unbound: Vendor import 1.18.0

Release notes at
    https://www.nlnetlabs.nl/news/2023/Aug/30/unbound-1.18.0-released/

Merge commit '401770e05c71ecb5ae61a59d316069b4b78bf622' into main

(cherry picked from commit 8f76bb7dad48538c6832c2fb466a433d2a3f8cd5)

148 files changed, 9439 insertions, 1708 deletions

diff --git a/contrib/unbound/Makefile.in b/contrib/unbound/Makefile.in
index bc021aa1eb00..0a2e7f9b6f08 100644
--- a/contrib/unbound/Makefile.in
+++ b/contrib/unbound/Makefile.in
@@ -122,15 +122,15 @@ iterator/iter_delegpt.c iterator/iter_donotq.c iterator/iter_fwd.c \
 iterator/iter_hints.c iterator/iter_priv.c iterator/iter_resptype.c \
 iterator/iter_scrub.c iterator/iter_utils.c services/listen_dnsport.c \
 services/localzone.c services/mesh.c services/modstack.c services/view.c \
-services/rpz.c \
+services/rpz.c util/rfc_1982.c \
 services/outbound_list.c services/outside_network.c util/alloc.c \
 util/config_file.c util/configlexer.c util/configparser.c \
 util/shm_side/shm_main.c services/authzone.c \
 util/fptr_wlist.c util/locks.c util/log.c util/mini_event.c util/module.c \
 util/netevent.c util/net_help.c util/random.c util/rbtree.c util/regional.c \
-util/rtt.c util/edns.c util/storage/dnstree.c util/storage/lookup3.c \
+util/rtt.c util/siphash.c util/edns.c util/storage/dnstree.c util/storage/lookup3.c \
 util/storage/lruhash.c util/storage/slabhash.c util/tcp_conn_limit.c \
-util/timehist.c util/tube.c util/proxy_protocol.c \
+util/timehist.c util/tube.c util/proxy_protocol.c util/timeval_func.c \
 util/ub_event.c util/ub_event_pluggable.c util/winsock_event.c \
 validator/autotrust.c validator/val_anchor.c validator/validator.c \
 validator/val_kcache.c validator/val_kentry.c validator/val_neg.c \
@@ -145,14 +145,14 @@ as112.lo msgparse.lo msgreply.lo packed_rrset.lo iterator.lo iter_delegpt.lo \
 iter_donotq.lo iter_fwd.lo iter_hints.lo iter_priv.lo iter_resptype.lo \
 iter_scrub.lo iter_utils.lo localzone.lo mesh.lo modstack.lo view.lo \
 outbound_list.lo alloc.lo config_file.lo configlexer.lo configparser.lo \
-fptr_wlist.lo edns.lo locks.lo log.lo mini_event.lo module.lo net_help.lo \
+fptr_wlist.lo siphash.lo edns.lo locks.lo log.lo mini_event.lo module.lo net_help.lo \
 random.lo rbtree.lo regional.lo rtt.lo dnstree.lo lookup3.lo lruhash.lo \
 slabhash.lo tcp_conn_limit.lo timehist.lo tube.lo winsock_event.lo \
-autotrust.lo val_anchor.lo rpz.lo proxy_protocol.lo \
+autotrust.lo val_anchor.lo rpz.lo rfc_1982.lo proxy_protocol.lo \
 validator.lo val_kcache.lo val_kentry.lo val_neg.lo val_nsec3.lo val_nsec.lo \
 val_secalgo.lo val_sigcrypt.lo val_utils.lo dns64.lo $(CACHEDB_OBJ) authzone.lo \
 $(SUBNET_OBJ) $(PYTHONMOD_OBJ) $(CHECKLOCK_OBJ) $(DNSTAP_OBJ) $(DNSCRYPT_OBJ) \
-$(IPSECMOD_OBJ) $(IPSET_OBJ) $(DYNLIBMOD_OBJ) respip.lo
+$(IPSECMOD_OBJ) $(IPSET_OBJ) $(DYNLIBMOD_OBJ) respip.lo timeval_func.lo
 COMMON_OBJ_WITHOUT_UB_EVENT=$(COMMON_OBJ_WITHOUT_NETCALL) netevent.lo listen_dnsport.lo \
 outside_network.lo
 COMMON_OBJ=$(COMMON_OBJ_WITHOUT_UB_EVENT) ub_event.lo
@@ -198,7 +198,7 @@ CHECKCONF_OBJ=unbound-checkconf.lo worker_cb.lo
 CHECKCONF_OBJ_LINK=$(CHECKCONF_OBJ) $(COMMON_OBJ_ALL_SYMBOLS) $(SLDNS_OBJ) \
 $(COMPAT_OBJ) @WIN_CHECKCONF_OBJ_LINK@
 CONTROL_SRC=smallapp/unbound-control.c
-CONTROL_OBJ=unbound-control.lo 
+CONTROL_OBJ=unbound-control.lo
 CONTROL_OBJ_LINK=$(CONTROL_OBJ) worker_cb.lo $(COMMON_OBJ_ALL_SYMBOLS) \
 $(SLDNS_OBJ) $(COMPAT_OBJ) @WIN_CONTROL_OBJ_LINK@
 HOST_SRC=smallapp/unbound-host.c
@@ -455,6 +455,7 @@ unbound-dnstap-socket.lo unbound-dnstap-socket.o: $(srcdir)/dnstap/unbound-dnsta
 dynlibmod.lo dynlibdmod.o: $(srcdir)/dynlibmod/dynlibmod.c config.h $(srcdir)/dynlibmod/dynlibmod.h
 cachedb.lo cachedb.o: $(srcdir)/cachedb/cachedb.c config.h $(srcdir)/cachedb/cachedb.h
 redis.lo redis.o: $(srcdir)/cachedb/redis.c config.h $(srcdir)/cachedb/redis.h
+timeval_func.lo timeval_func.o: $(srcdir)/util/timeval_func.c $(srcdir)/util/timeval_func.h
 
 # dnscrypt
 dnscrypt.lo dnscrypt.o: $(srcdir)/dnscrypt/dnscrypt.c config.h \
@@ -498,6 +499,7 @@ util/configlexer.c:  $(srcdir)/util/configlexer.lex util/configparser.h
 		echo "#include \"util/configyyrename.h\"" >> $@ ;\
 		$(LEX) -t $(srcdir)/util/configlexer.lex >> $@ ;\
 	fi
+	@if test ! -f $@; then echo "No $@ : need flex and bison to compile from source repository"; exit 1; fi
 
 util/configparser.c util/configparser.h:  $(srcdir)/util/configparser.y
 	@-if test ! -d util; then $(INSTALL) -d util; fi
@@ -516,7 +518,7 @@ distclean: clean
 	rm -f doc/example.conf doc/libunbound.3 doc/unbound-anchor.8 doc/unbound-checkconf.8 doc/unbound-control.8 doc/unbound.8 doc/unbound.conf.5 doc/unbound-host.1
 	rm -f smallapp/unbound-control-setup.sh dnstap/dnstap_config.h dnscrypt/dnscrypt_config.h contrib/libunbound.pc contrib/unbound.socket contrib/unbound.service
 	rm -f $(TEST_BIN)
-	rm -f Makefile 
+	rm -f Makefile
 
 maintainer-clean: distclean
 	rm -f util/configlexer.c util/configparser.c util/configparser.h
@@ -649,7 +651,7 @@ uninstall:	$(PYTHONMOD_UNINSTALL) $(PYUNBOUND_UNINSTALL) $(UNBOUND_EVENT_UNINSTA
 
 iana_update:
 	curl -o port-numbers.tmp https://www.iana.org/assignments/service-names-port-numbers/service-names-port-numbers.xml --compressed
-	if file port-numbers.tmp | grep 'gzip' >/dev/null; then zcat port-numbers.tmp; else cat port-numbers.tmp; fi | awk '/<record>/ {p=0;} /<protocol>udp/ {p=1;} /<protocol>[^u]/ {p=0;} /Decomissioned|Decommissioned|Removed|De-registered|unassigned|Unassigned|Reserved/ {u=1;} /<number>/ { if(u==1) {u=0;} else { if(p==1) { match($$0,/[0-9]+/); print substr($$0, RSTART, RLENGTH) ","}}}' | sort -nu > util/iana_ports.inc  
+	if file port-numbers.tmp | grep 'gzip' >/dev/null; then zcat port-numbers.tmp; else cat port-numbers.tmp; fi | awk '/<record>/ {p=0;} /<protocol>udp/ {p=1;} /<protocol>[^u]/ {p=0;} /Decomissioned|Decommissioned|Removed|De-registered|unassigned|Unassigned|Reserved/ {u=1;} /<number>/ { if(u==1) {u=0;} else { if(p==1) { match($$0,/[0-9]+/); print substr($$0, RSTART, RLENGTH) ","}}}' | sort -nu > util/iana_ports.inc
 	rm -f port-numbers.tmp
 
 # dependency generation
@@ -877,7 +879,7 @@ rpz.lo rpz.o: $(srcdir)/services/rpz.c config.h $(srcdir)/services/rpz.h $(srcdi
 outbound_list.lo outbound_list.o: $(srcdir)/services/outbound_list.c config.h \
  $(srcdir)/services/outbound_list.h $(srcdir)/services/outside_network.h $(srcdir)/util/rbtree.h \
  $(srcdir)/util/netevent.h $(srcdir)/dnscrypt/dnscrypt.h  \
- 
+
 outside_network.lo outside_network.o: $(srcdir)/services/outside_network.c config.h \
  $(srcdir)/services/outside_network.h $(srcdir)/util/rbtree.h $(srcdir)/util/netevent.h \
  $(srcdir)/dnscrypt/dnscrypt.h   \
@@ -915,7 +917,8 @@ config_file.lo config_file.o: $(srcdir)/util/config_file.c config.h $(srcdir)/ut
 configlexer.lo configlexer.o: util/configlexer.c config.h $(srcdir)/util/configyyrename.h \
  $(srcdir)/util/config_file.h util/configparser.h
 configparser.lo configparser.o: util/configparser.c config.h $(srcdir)/util/configyyrename.h \
- $(srcdir)/util/config_file.h $(srcdir)/util/net_help.h $(srcdir)/util/log.h
+ $(srcdir)/util/config_file.h $(srcdir)/util/net_help.h $(srcdir)/util/log.h $(srcdir)/sldns/str2wire.h \
+ $(srcdir)/sldns/rrdef.h
 shm_main.lo shm_main.o: $(srcdir)/util/shm_side/shm_main.c config.h $(srcdir)/util/shm_side/shm_main.h \
  $(srcdir)/libunbound/unbound.h $(srcdir)/daemon/daemon.h $(srcdir)/util/locks.h $(srcdir)/util/log.h \
  $(srcdir)/util/alloc.h $(srcdir)/services/modstack.h  \
@@ -928,7 +931,7 @@ shm_main.lo shm_main.o: $(srcdir)/util/shm_side/shm_main.c config.h $(srcdir)/ut
  $(srcdir)/services/view.h $(srcdir)/util/config_file.h $(srcdir)/services/authzone.h $(srcdir)/respip/respip.h \
  $(srcdir)/services/cache/rrset.h $(srcdir)/util/storage/slabhash.h $(srcdir)/services/cache/infra.h \
  $(srcdir)/util/rtt.h $(srcdir)/validator/validator.h $(srcdir)/validator/val_utils.h $(srcdir)/util/fptr_wlist.h \
- $(srcdir)/util/tube.h
+ $(srcdir)/util/tube.h $(srcdir)/util/timeval_func.h
 authzone.lo authzone.o: $(srcdir)/services/authzone.c config.h $(srcdir)/services/authzone.h \
  $(srcdir)/util/rbtree.h $(srcdir)/util/locks.h $(srcdir)/util/log.h $(srcdir)/services/mesh.h $(srcdir)/util/netevent.h \
  $(srcdir)/dnscrypt/dnscrypt.h  $(srcdir)/util/data/msgparse.h \
@@ -983,7 +986,7 @@ netevent.lo netevent.o: $(srcdir)/util/netevent.c config.h $(srcdir)/util/neteve
  $(srcdir)/services/modstack.h $(srcdir)/services/rpz.h $(srcdir)/services/localzone.h $(srcdir)/services/view.h \
  $(srcdir)/sldns/sbuffer.h $(srcdir)/util/config_file.h $(srcdir)/services/authzone.h $(srcdir)/daemon/stats.h \
  $(srcdir)/util/timehist.h $(srcdir)/libunbound/unbound.h $(srcdir)/respip/respip.h $(srcdir)/sldns/str2wire.h \
- $(srcdir)/dnstap/dnstap.h  $(srcdir)/services/listen_dnsport.h
+ $(srcdir)/dnstap/dnstap.h  $(srcdir)/services/listen_dnsport.h $(srcdir)/util/timeval_func.h
 proxy_protocol.lo proxy_protocol.o: $(srcdir)/util/proxy_protocol.c config.h \
  $(srcdir)/util/proxy_protocol.h $(srcdir)/sldns/sbuffer.h
 net_help.lo net_help.o: $(srcdir)/util/net_help.c config.h $(srcdir)/util/net_help.h $(srcdir)/util/log.h \
@@ -1006,6 +1009,8 @@ rtt.lo rtt.o: $(srcdir)/util/rtt.c config.h $(srcdir)/util/rtt.h $(srcdir)/itera
  $(srcdir)/services/outbound_list.h $(srcdir)/util/data/msgreply.h $(srcdir)/util/storage/lruhash.h \
  $(srcdir)/util/locks.h $(srcdir)/util/log.h $(srcdir)/util/data/packed_rrset.h $(srcdir)/util/module.h \
  $(srcdir)/util/data/msgparse.h $(srcdir)/sldns/pkthdr.h $(srcdir)/sldns/rrdef.h
+siphash.lo siphash.o: $(srcdir)/util/siphash.c
+rfc_1982.lo rfc_1982.o: $(srcdir)/util/rfc_1982.c
 edns.lo edns.o: $(srcdir)/util/edns.c config.h $(srcdir)/util/edns.h $(srcdir)/util/storage/dnstree.h \
  $(srcdir)/util/rbtree.h $(srcdir)/util/config_file.h $(srcdir)/util/netevent.h $(srcdir)/dnscrypt/dnscrypt.h \
   $(srcdir)/util/net_help.h $(srcdir)/util/log.h $(srcdir)/util/regional.h \
@@ -1186,7 +1191,7 @@ unitmain.lo unitmain.o: $(srcdir)/testcode/unitmain.c config.h $(srcdir)/sldns/r
  $(srcdir)/util/storage/dnstree.h $(srcdir)/util/rbtree.h $(srcdir)/util/netevent.h $(srcdir)/dnscrypt/dnscrypt.h \
   $(srcdir)/util/random.h $(srcdir)/respip/respip.h \
  $(srcdir)/services/localzone.h $(srcdir)/services/view.h $(srcdir)/sldns/sbuffer.h \
- $(srcdir)/services/outside_network.h 
+ $(srcdir)/services/outside_network.h
 unitmsgparse.lo unitmsgparse.o: $(srcdir)/testcode/unitmsgparse.c config.h $(srcdir)/util/log.h \
  $(srcdir)/testcode/unitmain.h $(srcdir)/util/data/msgparse.h $(srcdir)/util/storage/lruhash.h \
  $(srcdir)/util/locks.h $(srcdir)/sldns/pkthdr.h $(srcdir)/sldns/rrdef.h $(srcdir)/util/data/msgreply.h \
@@ -1321,7 +1326,7 @@ unbound.lo unbound.o: $(srcdir)/daemon/unbound.c config.h $(srcdir)/util/log.h $
 worker.lo worker.o: $(srcdir)/daemon/worker.c config.h $(srcdir)/util/log.h $(srcdir)/util/net_help.h \
  $(srcdir)/util/random.h $(srcdir)/daemon/worker.h $(srcdir)/libunbound/worker.h $(srcdir)/sldns/sbuffer.h \
  $(srcdir)/util/data/packed_rrset.h $(srcdir)/util/storage/lruhash.h $(srcdir)/util/locks.h \
- $(srcdir)/util/netevent.h $(srcdir)/dnscrypt/dnscrypt.h  \
+ $(srcdir)/util/netevent.h $(srcdir)/dnscrypt/dnscrypt.h $(srcdir)/util/timeval_func.h \
  $(srcdir)/util/alloc.h $(srcdir)/util/data/msgreply.h $(srcdir)/util/data/msgparse.h $(srcdir)/sldns/pkthdr.h \
  $(srcdir)/sldns/rrdef.h $(srcdir)/daemon/stats.h $(srcdir)/util/timehist.h $(srcdir)/libunbound/unbound.h \
  $(srcdir)/util/module.h $(srcdir)/dnstap/dnstap.h  $(srcdir)/daemon/daemon.h \
@@ -1343,7 +1348,7 @@ testbound.lo testbound.o: $(srcdir)/testcode/testbound.c config.h $(srcdir)/test
  $(srcdir)/daemon/remote.h $(srcdir)/libunbound/worker.h $(srcdir)/sldns/sbuffer.h \
  $(srcdir)/util/data/packed_rrset.h $(srcdir)/util/storage/lruhash.h $(srcdir)/util/locks.h $(srcdir)/util/log.h \
  $(srcdir)/util/config_file.h $(srcdir)/sldns/keyraw.h $(srcdir)/daemon/unbound.c $(srcdir)/daemon/daemon.h \
- $(srcdir)/util/alloc.h $(srcdir)/services/modstack.h  \
+ $(srcdir)/util/alloc.h $(srcdir)/util/timeval_func.h $(srcdir)/services/modstack.h  \
  $(srcdir)/util/storage/slabhash.h $(srcdir)/services/listen_dnsport.h $(srcdir)/services/cache/rrset.h \
  $(srcdir)/services/cache/infra.h $(srcdir)/util/storage/dnstree.h $(srcdir)/util/rtt.h \
  $(srcdir)/util/data/msgreply.h $(srcdir)/util/fptr_wlist.h $(srcdir)/util/module.h \
@@ -1357,7 +1362,7 @@ testpkts.lo testpkts.o: $(srcdir)/testcode/testpkts.c config.h $(srcdir)/testcod
 worker.lo worker.o: $(srcdir)/daemon/worker.c config.h $(srcdir)/util/log.h $(srcdir)/util/net_help.h \
  $(srcdir)/util/random.h $(srcdir)/daemon/worker.h $(srcdir)/libunbound/worker.h $(srcdir)/sldns/sbuffer.h \
  $(srcdir)/util/data/packed_rrset.h $(srcdir)/util/storage/lruhash.h $(srcdir)/util/locks.h \
- $(srcdir)/util/netevent.h $(srcdir)/dnscrypt/dnscrypt.h  \
+ $(srcdir)/util/netevent.h $(srcdir)/dnscrypt/dnscrypt.h $(srcdir)/util/timeval_func.h \
  $(srcdir)/util/alloc.h $(srcdir)/util/data/msgreply.h $(srcdir)/util/data/msgparse.h $(srcdir)/sldns/pkthdr.h \
  $(srcdir)/sldns/rrdef.h $(srcdir)/daemon/stats.h $(srcdir)/util/timehist.h $(srcdir)/libunbound/unbound.h \
  $(srcdir)/util/module.h $(srcdir)/dnstap/dnstap.h  $(srcdir)/daemon/daemon.h \
@@ -1409,7 +1414,7 @@ stats.lo stats.o: $(srcdir)/daemon/stats.c config.h $(srcdir)/daemon/stats.h $(s
  $(srcdir)/validator/val_kcache.h $(srcdir)/validator/val_neg.h
 replay.lo replay.o: $(srcdir)/testcode/replay.c config.h $(srcdir)/util/log.h $(srcdir)/util/net_help.h \
  $(srcdir)/util/config_file.h $(srcdir)/testcode/replay.h $(srcdir)/util/netevent.h $(srcdir)/dnscrypt/dnscrypt.h \
-  $(srcdir)/testcode/testpkts.h $(srcdir)/util/rbtree.h \
+  $(srcdir)/testcode/testpkts.h $(srcdir)/util/rbtree.h $(srcdir)/util/timeval_func.h \
  $(srcdir)/testcode/fake_event.h $(srcdir)/sldns/str2wire.h $(srcdir)/sldns/rrdef.h
 fake_event.lo fake_event.o: $(srcdir)/testcode/fake_event.c config.h $(srcdir)/testcode/fake_event.h \
  $(srcdir)/util/netevent.h $(srcdir)/dnscrypt/dnscrypt.h  \
@@ -1417,7 +1422,7 @@ fake_event.lo fake_event.o: $(srcdir)/testcode/fake_event.c config.h $(srcdir)/t
  $(srcdir)/util/locks.h $(srcdir)/sldns/pkthdr.h $(srcdir)/sldns/rrdef.h $(srcdir)/util/data/msgreply.h \
  $(srcdir)/util/data/packed_rrset.h $(srcdir)/util/data/msgencode.h $(srcdir)/util/data/dname.h \
  $(srcdir)/util/edns.h $(srcdir)/util/storage/dnstree.h $(srcdir)/util/rbtree.h $(srcdir)/util/config_file.h \
- $(srcdir)/services/listen_dnsport.h $(srcdir)/services/outside_network.h \
+ $(srcdir)/services/listen_dnsport.h $(srcdir)/services/outside_network.h $(srcdir)/util/timeval_func.h \
   $(srcdir)/services/cache/infra.h $(srcdir)/util/rtt.h \
  $(srcdir)/testcode/replay.h $(srcdir)/testcode/testpkts.h $(srcdir)/util/fptr_wlist.h $(srcdir)/util/module.h \
  $(srcdir)/util/tube.h $(srcdir)/services/mesh.h $(srcdir)/services/modstack.h $(srcdir)/services/rpz.h \
diff --git a/contrib/unbound/README.md b/contrib/unbound/README.md
index c3d9bc2492ef..c220da030458 100644
--- a/contrib/unbound/README.md
+++ b/contrib/unbound/README.md
@@ -1,6 +1,6 @@
 # Unbound
 
-[![Travis Build Status](https://travis-ci.org/NLnetLabs/unbound.svg?branch=master)](https://travis-ci.org/NLnetLabs/unbound)
+[![Github Build Status](https://github.com/NLnetLabs/unbound/actions/workflows/ci.yml/badge.svg?branch=master)](https://github.com/NLnetLabs/unbound/actions)
 [![Packaging status](https://repology.org/badge/tiny-repos/unbound.svg)](https://repology.org/project/unbound/versions)
 [![Fuzzing Status](https://oss-fuzz-build-logs.storage.googleapis.com/badges/unbound.svg)](https://bugs.chromium.org/p/oss-fuzz/issues/list?sort=-opened&can=1&q=proj:unbound)
 [![Documentation Status](https://readthedocs.org/projects/unbound/badge/?version=latest)](https://unbound.readthedocs.io/en/latest/?badge=latest)
diff --git a/contrib/unbound/acx_nlnetlabs.m4 b/contrib/unbound/acx_nlnetlabs.m4
index cf436ec54bb6..f27615bd8bce 100644
--- a/contrib/unbound/acx_nlnetlabs.m4
+++ b/contrib/unbound/acx_nlnetlabs.m4
@@ -2,7 +2,9 @@
 # Copyright 2009, Wouter Wijngaards, NLnet Labs.   
 # BSD licensed.
 #
-# Version 44
+# Version 46
+# 2023-05-04 fix to remove unused whitespace.
+# 2023-01-26 fix -Wstrict-prototypes.
 # 2022-09-01 fix checking if nonblocking sockets work on OpenBSD.
 # 2021-08-17 fix sed script in ssldir split handling.
 # 2021-08-17 fix for openssl to detect split version, with ssldir_include
@@ -187,7 +189,7 @@ dnl cache=`echo $1 | sed 'y%.=/+- %___p__%'`
 AC_CACHE_VAL(cv_prog_cc_flag_needed_$cache,
 [
 echo '$2' > conftest.c
-echo 'void f(){}' >>conftest.c
+echo 'void f(void){}' >>conftest.c
 if test -z "`$CC $CPPFLAGS $CFLAGS $ERRFLAG -c conftest.c 2>&1`"; then
 eval "cv_prog_cc_flag_needed_$cache=no"
 else
@@ -233,7 +235,7 @@ dnl DEPFLAG: set to flag that generates dependencies.
 AC_DEFUN([ACX_DEPFLAG],
 [
 AC_MSG_CHECKING([$CC dependency flag])
-echo 'void f(){}' >conftest.c
+echo 'void f(void){}' >conftest.c
 if test "`$CC -MM conftest.c 2>&1`" = "conftest.o: conftest.c"; then
 	DEPFLAG="-MM"
 else 
@@ -272,7 +274,7 @@ ACX_CHECK_COMPILER_FLAG_NEEDED($C99FLAG -D__EXTENSIONS__ -D_BSD_SOURCE -D_DEFAUL
 #include <getopt.h>
 #endif
 
-int test() {
+int test(void) {
 	int a;
 	char **opts = NULL;
 	struct timeval tv;
@@ -309,7 +311,7 @@ ACX_CHECK_COMPILER_FLAG_NEEDED($C99FLAG -D__EXTENSIONS__ -D_BSD_SOURCE -D_DEFAUL
 #include <getopt.h>
 #endif
 
-int test() {
+int test(void) {
 	int a;
 	char **opts = NULL;
 	struct timeval tv;
@@ -335,7 +337,7 @@ ACX_CHECK_COMPILER_FLAG_NEEDED($C99FLAG,
 [
 #include <stdbool.h>
 #include <ctype.h>
-int test() {
+int test(void) {
         int a = 0;
         return a;
 }
@@ -345,7 +347,7 @@ ACX_CHECK_COMPILER_FLAG_NEEDED(-D_BSD_SOURCE -D_DEFAULT_SOURCE,
 [
 #include <ctype.h>
 
-int test() {
+int test(void) {
         int a;
         a = isascii(32);
         return a;
@@ -356,7 +358,7 @@ ACX_CHECK_COMPILER_FLAG_NEEDED(-D_GNU_SOURCE,
 [
 #include <netinet/in.h>
 
-int test() {
+int test(void) {
         struct in6_pktinfo inf;
 	int a = (int)sizeof(inf);
         return a;
@@ -370,7 +372,7 @@ ACX_CHECK_COMPILER_FLAG_NEEDED(-D_GNU_SOURCE -D_FRSRESGID,
 [
 #include <unistd.h>
 
-int test() {
+int test(void) {
 	int a = setresgid(0,0,0);
 	a = setresuid(0,0,0);
         return a;
@@ -385,7 +387,7 @@ ACX_CHECK_COMPILER_FLAG_NEEDED(-D_POSIX_C_SOURCE=200112,
 #endif
 #include <netdb.h>
 
-int test() {
+int test(void) {
         int a = 0;
         char *t;
         time_t time = 0;
@@ -413,7 +415,7 @@ ACX_CHECK_COMPILER_FLAG_NEEDED(-D__EXTENSIONS__,
 #include <getopt.h>
 #endif
 
-int test() {
+int test(void) {
         int a;
         char **opts = NULL;
         struct timeval tv;
@@ -475,7 +477,7 @@ fi
 dnl Setup ATTR_FORMAT config.h parts.
 dnl make sure you call ACX_CHECK_FORMAT_ATTRIBUTE also.
 AC_DEFUN([AHX_CONFIG_FORMAT_ATTRIBUTE],
-[ 
+[
 #ifdef HAVE_ATTR_FORMAT
 #  define ATTR_FORMAT(archetype, string_index, first_to_check) \
     __attribute__ ((format (archetype, string_index, first_to_check)))
@@ -834,7 +836,7 @@ dnl try to see if an additional _LARGEFILE_SOURCE 1 is needed to get fseeko
 ACX_CHECK_COMPILER_FLAG_NEEDED(-D_LARGEFILE_SOURCE=1,
 [
 #include <stdio.h>
-int test() {
+int test(void) {
         int a = fseeko(stdin, 0, 0);
         return a;
 }
@@ -859,7 +861,7 @@ char* (*f) () = getaddrinfo;
 #ifdef __cplusplus
 }
 #endif
-int main() {
+int main(void) {
         ;
         return 0;
 }
@@ -923,7 +925,7 @@ cache=`echo $1 | sed 'y%.=/+-%___p_%'`
 AC_CACHE_VAL(cv_cc_deprecated_$cache,
 [
 echo '$3' >conftest.c
-echo 'void f(){ $2 }' >>conftest.c
+echo 'void f(void){ $2 }' >>conftest.c
 if test -z "`$CC $CPPFLAGS $CFLAGS -c conftest.c 2>&1 | grep -e deprecated -e unavailable`"; then
 eval "cv_cc_deprecated_$cache=no"
 else
@@ -1317,7 +1319,7 @@ AC_DEFUN([AHX_CONFIG_W32_FD_SET_T],
 #ifdef HAVE_WINSOCK2_H
 #define FD_SET_T (u_int)
 #else
-#define FD_SET_T 
+#define FD_SET_T
 #endif
 ])
 
@@ -1355,7 +1357,7 @@ dnl $3: define value, 1
 AC_DEFUN([AHX_CONFIG_FLAG_OMITTED],
 [#if defined($1) && !defined($2)
 #define $2 $3
-[#]endif ])
+[#]endif])
 
 dnl Wrapper for AHX_CONFIG_FLAG_OMITTED for -D style flags
 dnl $1: the -DNAME or -DNAME=value string.
diff --git a/contrib/unbound/acx_python.m4 b/contrib/unbound/acx_python.m4
index 16c0c6fd943f..c945d6c8989e 100644
--- a/contrib/unbound/acx_python.m4
+++ b/contrib/unbound/acx_python.m4
@@ -17,33 +17,62 @@ AC_DEFUN([AC_PYTHON_DEVEL],[
 		PYTHON_VERSION=`$PYTHON -c "import sys; \
 			print(sys.version.split()[[0]])"`
 	fi
+	# calculate the version number components.
+	[
+	v="$PYTHON_VERSION"
+	PYTHON_VERSION_MAJOR=`echo $v | sed 's/[^0-9].*//'`
+	if test -z "$PYTHON_VERSION_MAJOR"; then PYTHON_VERSION_MAJOR="0"; fi
+	v=`echo $v | sed -e 's/^[0-9]*$//' -e 's/[0-9]*[^0-9]//'`
+	PYTHON_VERSION_MINOR=`echo $v | sed 's/[^0-9].*//'`
+	if test -z "$PYTHON_VERSION_MINOR"; then PYTHON_VERSION_MINOR="0"; fi
+	v=`echo $v | sed -e 's/^[0-9]*$//' -e 's/[0-9]*[^0-9]//'`
+	PYTHON_VERSION_PATCH=`echo $v | sed 's/[^0-9].*//'`
+	if test -z "$PYTHON_VERSION_PATCH"; then PYTHON_VERSION_PATCH="0"; fi
+	]
 
-	# Check if you have sysconfig
-	AC_MSG_CHECKING([for the sysconfig Python module])
-        if ac_sysconfig_result=`$PYTHON -c "import sysconfig" 2>&1`; then
+	# For some systems, sysconfig exists, but has the wrong paths,
+	# on Debian 10, for python 2.7 and 3.7. So, we check the version,
+	# and for older versions try distutils.sysconfig first. For newer
+	# versions>=3.10, where distutils.sysconfig is deprecated, use
+	# sysconfig first and then attempt the other one.
+	py_distutils_first="no"
+	if test $PYTHON_VERSION_MAJOR -lt 3; then
+		py_distutils_first="yes"
+	fi
+	if test $PYTHON_VERSION_MAJOR -eq 3 -a $PYTHON_VERSION_MINOR -lt 10; then
+		py_distutils_first="yes"
+	fi
+
+	# Check if you have the first module
+	if test "$py_distutils_first" = "yes"; then m="distutils"; else m="sysconfig"; fi
+	sysconfig_module=""
+	AC_MSG_CHECKING([for the $m Python module])
+        if ac_modulecheck_result1=`$PYTHON -c "import $m" 2>&1`; then
                 AC_MSG_RESULT([yes])
-		sysconfig_module="sysconfig"
-		# if yes, use sysconfig, because distutils is deprecated.
+		sysconfig_module="$m"
 	else
                 AC_MSG_RESULT([no])
-		# if no, try to use distutils
+	fi
 
-		#
-		# Check if you have distutils, else fail
-		#
-		AC_MSG_CHECKING([for the distutils Python package])
-		if ac_distutils_result=`$PYTHON -c "import distutils" 2>&1`; then
+	# if not found, try the other one.
+	if test -z "$sysconfig_module"; then
+		if test "$py_distutils_first" = "yes"; then m2="sysconfig"; else m2="distutils"; fi
+		AC_MSG_CHECKING([for the $m2 Python module])
+		if ac_modulecheck_result2=`$PYTHON -c "import $m2" 2>&1`; then
 			AC_MSG_RESULT([yes])
+			sysconfig_module="$m2"
 		else
 			AC_MSG_RESULT([no])
-			AC_MSG_ERROR([cannot import Python module "distutils".
-	Please check your Python installation. The error was:
-	$ac_distutils_result])
+			AC_MSG_ERROR([cannot import Python module "$m", or "$m2".
+	Please check your Python installation. The errors are:
+	$m
+	$ac_modulecheck_result1
+	$m2
+	$ac_modulecheck_result2])
 			PYTHON_VERSION=""
 		fi
-
-		sysconfig_module="distutils.sysconfig"
 	fi
+	if test "$sysconfig_module" = "distutils"; then sysconfig_module="distutils.sysconfig"; fi
 
         #
         # Check for Python include path
diff --git a/contrib/unbound/cachedb/cachedb.c b/contrib/unbound/cachedb/cachedb.c
index 245daa986967..30645268ca23 100644
--- a/contrib/unbound/cachedb/cachedb.c
+++ b/contrib/unbound/cachedb/cachedb.c
@@ -102,7 +102,6 @@ static int
 testframe_init(struct module_env* env, struct cachedb_env* cachedb_env)
 {
 	struct testframe_moddata* d;
-	(void)env;
 	verbose(VERB_ALGO, "testframe_init");
 	d = (struct testframe_moddata*)calloc(1,
 		sizeof(struct testframe_moddata));
@@ -111,6 +110,15 @@ testframe_init(struct module_env* env, struct cachedb_env* cachedb_env)
 		log_err("out of memory");
 		return 0;
 	}
+	/* Register an EDNS option (65534) to bypass the worker cache lookup
+	 * for testing */
+	if(!edns_register_option(LDNS_EDNS_UNBOUND_CACHEDB_TESTFRAME_TEST,
+		1 /* bypass cache */,
+		0 /* no aggregation */, env)) {
+		log_err("testframe_init, could not register test opcode");
+		free(d);
+		return 0;
+	}
 	lock_basic_init(&d->lock);
 	lock_protect(&d->lock, d, sizeof(*d));
 	return 1;
@@ -218,6 +226,8 @@ static int
 cachedb_apply_cfg(struct cachedb_env* cachedb_env, struct config_file* cfg)
 {
 	const char* backend_str = cfg->cachedb_backend;
+	if(!backend_str || *backend_str==0)
+		return 1;
 	cachedb_env->backend = cachedb_find_backend(backend_str);
 	if(!cachedb_env->backend) {
 		log_err("cachedb: cannot find backend name '%s'", backend_str);
@@ -228,7 +238,7 @@ cachedb_apply_cfg(struct cachedb_env* cachedb_env, struct config_file* cfg)
 	return 1;
 }
 
-int 
+int
 cachedb_init(struct module_env* env, int id)
 {
 	struct cachedb_env* cachedb_env = (struct cachedb_env*)calloc(1,
@@ -267,19 +277,16 @@ cachedb_init(struct module_env* env, int id)
 	return 1;
 }
 
-void 
+void
 cachedb_deinit(struct module_env* env, int id)
 {
 	struct cachedb_env* cachedb_env;
 	if(!env || !env->modinfo[id])
 		return;
 	cachedb_env = (struct cachedb_env*)env->modinfo[id];
-	/* free contents */
-	/* TODO */
 	if(cachedb_env->enabled) {
 		(*cachedb_env->backend->deinit)(env, cachedb_env);
 	}
-
 	free(cachedb_env);
 	env->modinfo[id] = NULL;
 }
@@ -406,6 +413,14 @@ prep_data(struct module_qstate* qstate, struct sldns_buffer* buf)
 	if(qstate->return_msg->rep->ttl == 0 &&
 		!qstate->env->cfg->serve_expired)
 		return 0;
+
+	/* The EDE is added to the out-list so it is encoded in the cached message */
+	if (qstate->env->cfg->ede && qstate->return_msg->rep->reason_bogus != LDNS_EDE_NONE) {
+		edns_opt_list_append_ede(&edns.opt_list_out, qstate->env->scratch,
+					qstate->return_msg->rep->reason_bogus,
+					qstate->return_msg->rep->reason_bogus_str);
+	}
+
 	if(verbosity >= VERB_ALGO)
 		log_dns_msg("cachedb encoding", &qstate->return_msg->qinfo,
 	                qstate->return_msg->rep);
@@ -502,6 +517,7 @@ parse_data(struct module_qstate* qstate, struct sldns_buffer* buf)
 {
 	struct msg_parse* prs;
 	struct edns_data edns;
+	struct edns_option* ede;
 	uint64_t timestamp, expiry;
 	time_t adjust;
 	size_t lim = sldns_buffer_limit(buf);
@@ -539,6 +555,24 @@ parse_data(struct module_qstate* qstate, struct sldns_buffer* buf)
 	if(!qstate->return_msg)
 		return 0;
 	
+	/* We find the EDE in the in-list after parsing */
+	if(qstate->env->cfg->ede &&
+		(ede = edns_opt_list_find(edns.opt_list_in, LDNS_EDNS_EDE))) {
+		if(ede->opt_len >= 2) {
+			qstate->return_msg->rep->reason_bogus =
+				sldns_read_uint16(ede->opt_data);
+		}
+		/* allocate space and store the error string and it's size */
+		if(ede->opt_len > 2) {
+			size_t ede_len = ede->opt_len - 2;
+			qstate->return_msg->rep->reason_bogus_str = regional_alloc(
+				qstate->region, sizeof(char) * (ede_len+1));
+			memcpy(qstate->return_msg->rep->reason_bogus_str,
+				ede->opt_data+2, ede_len);
+			qstate->return_msg->rep->reason_bogus_str[ede_len] = 0;
+		}
+	}
+
 	qstate->return_rcode = LDNS_RCODE_NOERROR;
 
 	/* see how much of the TTL expired, and remove it */
@@ -630,11 +664,15 @@ cachedb_extcache_store(struct module_qstate* qstate, struct cachedb_env* ie)
  * See if unbound's internal cache can answer the query
  */
 static int
-cachedb_intcache_lookup(struct module_qstate* qstate)
+cachedb_intcache_lookup(struct module_qstate* qstate, struct cachedb_env* cde)
 {
 	uint8_t* dpname=NULL;
 	size_t dpnamelen=0;
 	struct dns_msg* msg;
+	/* for testframe bypass this lookup */
+	if(cde->backend == &testframe_backend) {
+		return 0;
+	}
 	if(iter_stub_fwd_no_cache(qstate, &qstate->qinfo,
 		&dpname, &dpnamelen))
 		return 0; /* no cache for these queries */
@@ -693,6 +731,7 @@ cachedb_handle_query(struct module_qstate* qstate,
 	struct cachedb_qstate* ATTR_UNUSED(iq),
 	struct cachedb_env* ie, int id)
 {
+	qstate->is_cachedb_answer = 0;
 	/* check if we are enabled, and skip if so */
 	if(!ie->enabled) {
 		/* pass request to next module */
@@ -709,7 +748,7 @@ cachedb_handle_query(struct module_qstate* qstate,
 
 	/* lookup inside unbound's internal cache.
 	 * This does not look for expired entries. */
-	if(cachedb_intcache_lookup(qstate)) {
+	if(cachedb_intcache_lookup(qstate, ie)) {
 		if(verbosity >= VERB_ALGO) {
 			if(qstate->return_msg->rep)
 				log_dns_msg("cachedb internal cache lookup",
@@ -746,6 +785,7 @@ cachedb_handle_query(struct module_qstate* qstate,
 				qstate->ext_state[id] = module_wait_module;
 				return;
 		}
+		qstate->is_cachedb_answer = 1;
 		/* we are done with the query */
 		qstate->ext_state[id] = module_finished;
 		return;
@@ -768,6 +808,7 @@ static void
 cachedb_handle_response(struct module_qstate* qstate,
 	struct cachedb_qstate* ATTR_UNUSED(iq), struct cachedb_env* ie, int id)
 {
+	qstate->is_cachedb_answer = 0;
 	/* check if we are not enabled or instructed to not cache, and skip */
 	if(!ie->enabled || qstate->no_cache_store) {
 		/* we are done with the query */
diff --git a/contrib/unbound/cachedb/redis.c b/contrib/unbound/cachedb/redis.c
index 16c3741f786b..93a575a4c6d2 100644
--- a/contrib/unbound/cachedb/redis.c
+++ b/contrib/unbound/cachedb/redis.c
@@ -56,6 +56,8 @@ struct redis_moddata {
 	int numctxs;		/* number of ctx entries */
 	const char* server_host; /* server's IP address or host name */
 	int server_port;	 /* server's TCP port */
+	const char* server_path; /* server's unix path, or "", NULL if unused */
+	const char* server_password; /* server's AUTH password, or "", NULL if unused */
 	struct timeval timeout;	 /* timeout for connection setup and commands */
 };
 
@@ -67,8 +69,13 @@ redis_connect(const struct redis_moddata* moddata)
 {
 	redisContext* ctx;
 
-	ctx = redisConnectWithTimeout(moddata->server_host,
-		moddata->server_port, moddata->timeout);
+	if(moddata->server_path && moddata->server_path[0]!=0) {
+		ctx = redisConnectUnixWithTimeout(moddata->server_path,
+			moddata->timeout);
+	} else {
+		ctx = redisConnectWithTimeout(moddata->server_host,
+			moddata->server_port, moddata->timeout);
+	}
 	if(!ctx || ctx->err) {
 		const char *errstr = "out of memory";
 		if(ctx)
@@ -80,6 +87,17 @@ redis_connect(const struct redis_moddata* moddata)
 		log_err("failed to set redis timeout");
 		goto fail;
 	}
+	if(moddata->server_password && moddata->server_password[0]!=0) {
+		redisReply* rep;
+		rep = redisCommand(ctx, "AUTH %s", moddata->server_password);
+		if(!rep || rep->type == REDIS_REPLY_ERROR) {
+			log_err("failed to authenticate with password");
+			freeReplyObject(rep);
+			goto fail;
+		}
+		freeReplyObject(rep);
+	}
+	verbose(VERB_OPS, "Connection to Redis established");
 	return ctx;
 
   fail:
@@ -94,7 +112,7 @@ redis_init(struct module_env* env, struct cachedb_env* cachedb_env)
 	int i;
 	struct redis_moddata* moddata = NULL;
 
-	verbose(VERB_ALGO, "redis_init");
+	verbose(VERB_OPS, "Redis initialization");
 
 	moddata = calloc(1, sizeof(struct redis_moddata));
 	if(!moddata) {
@@ -112,6 +130,8 @@ redis_init(struct module_env* env, struct cachedb_env* cachedb_env)
 	 * we don't have to free it in this module. */
 	moddata->server_host = env->cfg->redis_server_host;
 	moddata->server_port = env->cfg->redis_server_port;
+	moddata->server_path = env->cfg->redis_server_path;
+	moddata->server_password = env->cfg->redis_server_password;
 	moddata->timeout.tv_sec = env->cfg->redis_timeout / 1000;
 	moddata->timeout.tv_usec = (env->cfg->redis_timeout % 1000) * 1000;
 	for(i = 0; i < moddata->numctxs; i++)
@@ -154,7 +174,7 @@ redis_deinit(struct module_env* env, struct cachedb_env* cachedb_env)
 		cachedb_env->backend_data;
 	(void)env;
 
-	verbose(VERB_ALGO, "redis_deinit");
+	verbose(VERB_OPS, "Redis deinitialization");
 
 	if(!moddata)
 		return;
diff --git a/contrib/unbound/compat/getentropy_solaris.c b/contrib/unbound/compat/getentropy_solaris.c
index 5e3b1cbbbd30..1ff8162917b3 100644
--- a/contrib/unbound/compat/getentropy_solaris.c
+++ b/contrib/unbound/compat/getentropy_solaris.c
@@ -47,7 +47,7 @@
 #define SHA512_Update SHA512Update
 #define SHA512_Final SHA512Final
 #else
-#include "openssl/sha.h"
+#include <openssl/sha.h>
 #endif
 
 #include <sys/vfs.h>
diff --git a/contrib/unbound/config.guess b/contrib/unbound/config.guess
index 980b02083815..b187213930f1 100755
--- a/contrib/unbound/config.guess
+++ b/contrib/unbound/config.guess
@@ -1,10 +1,10 @@
 #! /bin/sh
 # Attempt to guess a canonical system name.
-#   Copyright 1992-2022 Free Software Foundation, Inc.
+#   Copyright 1992-2023 Free Software Foundation, Inc.
 
 # shellcheck disable=SC2006,SC2268 # see below for rationale
 
-timestamp='2022-09-17'
+timestamp='2023-07-20'
 
 # This file is free software; you can redistribute it and/or modify it
 # under the terms of the GNU General Public License as published by
@@ -47,7 +47,7 @@ me=`echo "$0" | sed -e 's,.*/,,'`
 usage="\
 Usage: $0 [OPTION]
 
-Output the configuration name of the system \`$me' is run on.
+Output the configuration name of the system '$me' is run on.
 
 Options:
   -h, --help         print this help, then exit
@@ -60,13 +60,13 @@ version="\
 GNU config.guess ($timestamp)
 
 Originally written by Per Bothner.
-Copyright 1992-2022 Free Software Foundation, Inc.
+Copyright 1992-2023 Free Software Foundation, Inc.
 
 This is free software; see the source for copying conditions.  There is NO
 warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE."
 
 help="
-Try \`$me --help' for more information."
+Try '$me --help' for more information."
 
 # Parse command line
 while test $# -gt 0 ; do
@@ -102,8 +102,8 @@ GUESS=
 # temporary files to be created and, as you can see below, it is a
 # headache to deal with in a portable fashion.
 
-# Historically, `CC_FOR_BUILD' used to be named `HOST_CC'. We still
-# use `HOST_CC' if defined, but it is deprecated.
+# Historically, 'CC_FOR_BUILD' used to be named 'HOST_CC'. We still
+# use 'HOST_CC' if defined, but it is deprecated.
 
 # Portable tmp directory creation inspired by the Autoconf team.
 
@@ -459,7 +459,7 @@ case $UNAME_MACHINE:$UNAME_SYSTEM:$UNAME_RELEASE:$UNAME_VERSION in
 		UNAME_RELEASE=`uname -v`
 		;;
 	esac
-	# Japanese Language versions have a version number like `4.1.3-JL'.
+	# Japanese Language versions have a version number like '4.1.3-JL'.
 	SUN_REL=`echo "$UNAME_RELEASE" | sed -e 's/-/_/'`
 	GUESS=sparc-sun-sunos$SUN_REL
 	;;
@@ -976,7 +976,27 @@ EOF
 	GUESS=$UNAME_MACHINE-unknown-minix
 	;;
     aarch64:Linux:*:*)
-	GUESS=$UNAME_MACHINE-unknown-linux-$LIBC
+	set_cc_for_build
+	CPU=$UNAME_MACHINE
+	LIBCABI=$LIBC
+	if test "$CC_FOR_BUILD" != no_compiler_found; then
+	    ABI=64
+	    sed 's/^	    //' << EOF > "$dummy.c"
+	    #ifdef __ARM_EABI__
+	    #ifdef __ARM_PCS_VFP
+	    ABI=eabihf
+	    #else
+	    ABI=eabi
+	    #endif
+	    #endif
+EOF
+	    cc_set_abi=`$CC_FOR_BUILD -E "$dummy.c" 2>/dev/null | grep '^ABI' | sed 's, ,,g'`
+	    eval "$cc_set_abi"
+	    case $ABI in
+		eabi | eabihf) CPU=armv8l; LIBCABI=$LIBC$ABI ;;
+	    esac
+	fi
+	GUESS=$CPU-unknown-linux-$LIBCABI
 	;;
     aarch64_be:Linux:*:*)
 	UNAME_MACHINE=aarch64_be
@@ -1042,6 +1062,15 @@ EOF
     k1om:Linux:*:*)
 	GUESS=$UNAME_MACHINE-unknown-linux-$LIBC
 	;;
+    kvx:Linux:*:*)
+	GUESS=$UNAME_MACHINE-unknown-linux-$LIBC
+	;;
+    kvx:cos:*:*)
+	GUESS=$UNAME_MACHINE-unknown-cos
+	;;
+    kvx:mbr:*:*)
+	GUESS=$UNAME_MACHINE-unknown-mbr
+	;;
     loongarch32:Linux:*:* | loongarch64:Linux:*:*)
 	GUESS=$UNAME_MACHINE-unknown-linux-$LIBC
 	;;
@@ -1197,7 +1226,7 @@ EOF
 	GUESS=$UNAME_MACHINE-pc-sysv4.2uw$UNAME_VERSION
 	;;
     i*86:OS/2:*:*)
-	# If we were able to find `uname', then EMX Unix compatibility
+	# If we were able to find 'uname', then EMX Unix compatibility
 	# is probably installed.
 	GUESS=$UNAME_MACHINE-pc-os2-emx
 	;;
@@ -1338,7 +1367,7 @@ EOF
 		GUESS=ns32k-sni-sysv
 	fi
 	;;
-    PENTIUM:*:4.0*:*)	# Unisys `ClearPath HMP IX 4000' SVR4/MP effort
+    PENTIUM:*:4.0*:*)	# Unisys 'ClearPath HMP IX 4000' SVR4/MP effort
 			# says <Richard.M.Bartel@ccMail.Census.GOV>
 	GUESS=i586-unisys-sysv4
 	;;
diff --git a/contrib/unbound/config.h.in b/contrib/unbound/config.h.in
index 2caecf30d040..f31354d01408 100644
--- a/contrib/unbound/config.h.in
+++ b/contrib/unbound/config.h.in
@@ -364,6 +364,9 @@
 /* Define if we have LibreSSL */
 #undef HAVE_LIBRESSL
 
+/* Define to 1 if you have the <linux/net_tstamp.h> header file. */
+#undef HAVE_LINUX_NET_TSTAMP_H
+
 /* Define to 1 if you have the `localtime_r' function. */
 #undef HAVE_LOCALTIME_R
 
@@ -1068,39 +1071,39 @@
 
 #if defined(OMITTED__D_GNU_SOURCE) && !defined(_GNU_SOURCE)
 #define _GNU_SOURCE 1
-#endif 
+#endif
 
 #if defined(OMITTED__D_BSD_SOURCE) && !defined(_BSD_SOURCE)
 #define _BSD_SOURCE 1
-#endif 
+#endif
 
 #if defined(OMITTED__D_DEFAULT_SOURCE) && !defined(_DEFAULT_SOURCE)
 #define _DEFAULT_SOURCE 1
-#endif 
+#endif
 
 #if defined(OMITTED__D__EXTENSIONS__) && !defined(__EXTENSIONS__)
 #define __EXTENSIONS__ 1
-#endif 
+#endif
 
 #if defined(OMITTED__D_POSIX_C_SOURCE_200112) && !defined(_POSIX_C_SOURCE)
 #define _POSIX_C_SOURCE 200112
-#endif 
+#endif
 
 #if defined(OMITTED__D_XOPEN_SOURCE_600) && !defined(_XOPEN_SOURCE)
 #define _XOPEN_SOURCE 600
-#endif 
+#endif
 
 #if defined(OMITTED__D_XOPEN_SOURCE_EXTENDED_1) && !defined(_XOPEN_SOURCE_EXTENDED)
 #define _XOPEN_SOURCE_EXTENDED 1
-#endif 
+#endif
 
 #if defined(OMITTED__D_ALL_SOURCE) && !defined(_ALL_SOURCE)
 #define _ALL_SOURCE 1
-#endif 
+#endif
 
 #if defined(OMITTED__D_LARGEFILE_SOURCE_1) && !defined(_LARGEFILE_SOURCE)
 #define _LARGEFILE_SOURCE 1
-#endif 
+#endif
 
 
 
@@ -1184,7 +1187,7 @@
 #endif
 
 
- 
+
 #ifdef HAVE_ATTR_FORMAT
 #  define ATTR_FORMAT(archetype, string_index, first_to_check) \
     __attribute__ ((format (archetype, string_index, first_to_check)))
@@ -1294,7 +1297,7 @@ void* reallocarray(void *ptr, size_t nmemb, size_t size);
 #ifdef HAVE_WINSOCK2_H
 #define FD_SET_T (u_int)
 #else
-#define FD_SET_T 
+#define FD_SET_T
 #endif
 
 
diff --git a/contrib/unbound/config.h.in~ b/contrib/unbound/config.h.in~
new file mode 100644
index 000000000000..f31354d01408
--- /dev/null
+++ b/contrib/unbound/config.h.in~
@@ -0,0 +1,1456 @@
+/* config.h.in.  Generated from configure.ac by autoheader.  */
+
+/* apply the noreturn attribute to a function that exits the program */
+#undef ATTR_NORETURN
+
+/* apply the weak attribute to a symbol */
+#undef ATTR_WEAK
+
+/* Directory to chroot to */
+#undef CHROOT_DIR
+
+/* Define this to enable client subnet option. */
+#undef CLIENT_SUBNET
+
+/* Do sha512 definitions in config.h */
+#undef COMPAT_SHA512
+
+/* Command line arguments used with configure */
+#undef CONFCMDLINE
+
+/* Pathname to the Unbound configuration file */
+#undef CONFIGFILE
+
+/* Define this if on macOSX10.4-darwin8 and setreuid and setregid do not work
+   */
+#undef DARWIN_BROKEN_SETREUID
+
+/* Whether daemon is deprecated */
+#undef DEPRECATED_DAEMON
+
+/* Deprecate RSA 1024 bit length, makes that an unsupported key */
+#undef DEPRECATE_RSA_1024
+
+/* Define this to enable kernel based UDP source port randomization. */
+#undef DISABLE_EXPLICIT_PORT_RANDOMISATION
+
+/* default dnstap socket path */
+#undef DNSTAP_SOCKET_PATH
+
+/* Define if you want to use debug lock checking (slow). */
+#undef ENABLE_LOCK_CHECKS
+
+/* Define this if you enabled-allsymbols from libunbound to link binaries to
+   it for smaller install size, but the libunbound export table is polluted by
+   internal symbols */
+#undef EXPORT_ALL_SYMBOLS
+
+/* Define to 1 if you have the `accept4' function. */
+#undef HAVE_ACCEPT4
+
+/* Define to 1 if you have the `arc4random' function. */
+#undef HAVE_ARC4RANDOM
+
+/* Define to 1 if you have the `arc4random_uniform' function. */
+#undef HAVE_ARC4RANDOM_UNIFORM
+
+/* Define to 1 if you have the <arpa/inet.h> header file. */
+#undef HAVE_ARPA_INET_H
+
+/* Whether the C compiler accepts the "format" attribute */
+#undef HAVE_ATTR_FORMAT
+
+/* Whether the C compiler accepts the "noreturn" attribute */
+#undef HAVE_ATTR_NORETURN
+
+/* Whether the C compiler accepts the "unused" attribute */
+#undef HAVE_ATTR_UNUSED
+
+/* Whether the C compiler accepts the "weak" attribute */
+#undef HAVE_ATTR_WEAK
+
+/* If we have be64toh */
+#undef HAVE_BE64TOH
+
+/* Define to 1 if you have the `BIO_set_callback_ex' function. */
+#undef HAVE_BIO_SET_CALLBACK_EX
+
+/* Define to 1 if you have the <bsd/stdlib.h> header file. */
+#undef HAVE_BSD_STDLIB_H
+
+/* Define to 1 if you have the <bsd/string.h> header file. */
+#undef HAVE_BSD_STRING_H
+
+/* Define to 1 if you have the `chown' function. */
+#undef HAVE_CHOWN
+
+/* Define to 1 if you have the `chroot' function. */
+#undef HAVE_CHROOT
+
+/* Define to 1 if you have the `CRYPTO_cleanup_all_ex_data' function. */
+#undef HAVE_CRYPTO_CLEANUP_ALL_EX_DATA
+
+/* Define to 1 if you have the `CRYPTO_THREADID_set_callback' function. */
+#undef HAVE_CRYPTO_THREADID_SET_CALLBACK
+
+/* Define to 1 if you have the `ctime_r' function. */
+#undef HAVE_CTIME_R
+
+/* Define to 1 if you have the `daemon' function. */
+#undef HAVE_DAEMON
+
+/* Define to 1 if you have the declaration of `arc4random', and to 0 if you
+   don't. */
+#undef HAVE_DECL_ARC4RANDOM
+
+/* Define to 1 if you have the declaration of `arc4random_uniform', and to 0
+   if you don't. */
+#undef HAVE_DECL_ARC4RANDOM_UNIFORM
+
+/* Define to 1 if you have the declaration of `evsignal_assign', and to 0 if
+   you don't. */
+#undef HAVE_DECL_EVSIGNAL_ASSIGN
+
+/* Define to 1 if you have the declaration of `inet_ntop', and to 0 if you
+   don't. */
+#undef HAVE_DECL_INET_NTOP
+
+/* Define to 1 if you have the declaration of `inet_pton', and to 0 if you
+   don't. */
+#undef HAVE_DECL_INET_PTON
+
+/* Define to 1 if you have the declaration of `nghttp2_session_server_new',
+   and to 0 if you don't. */
+#undef HAVE_DECL_NGHTTP2_SESSION_SERVER_NEW
+
+/* Define to 1 if you have the declaration of `NID_ED25519', and to 0 if you
+   don't. */
+#undef HAVE_DECL_NID_ED25519
+
+/* Define to 1 if you have the declaration of `NID_ED448', and to 0 if you
+   don't. */
+#undef HAVE_DECL_NID_ED448
+
+/* Define to 1 if you have the declaration of `NID_secp384r1', and to 0 if you
+   don't. */
+#undef HAVE_DECL_NID_SECP384R1
+
+/* Define to 1 if you have the declaration of `NID_X9_62_prime256v1', and to 0
+   if you don't. */
+#undef HAVE_DECL_NID_X9_62_PRIME256V1
+
+/* Define to 1 if you have the declaration of `reallocarray', and to 0 if you
+   don't. */
+#undef HAVE_DECL_REALLOCARRAY
+
+/* Define to 1 if you have the declaration of `redisConnect', and to 0 if you
+   don't. */
+#undef HAVE_DECL_REDISCONNECT
+
+/* Define to 1 if you have the declaration of `sk_SSL_COMP_pop_free', and to 0
+   if you don't. */
+#undef HAVE_DECL_SK_SSL_COMP_POP_FREE
+
+/* Define to 1 if you have the declaration of
+   `SSL_COMP_get_compression_methods', and to 0 if you don't. */
+#undef HAVE_DECL_SSL_COMP_GET_COMPRESSION_METHODS
+
+/* Define to 1 if you have the declaration of `SSL_CTX_set_ecdh_auto', and to
+   0 if you don't. */
+#undef HAVE_DECL_SSL_CTX_SET_ECDH_AUTO
+
+/* Define to 1 if you have the declaration of `strlcat', and to 0 if you
+   don't. */
+#undef HAVE_DECL_STRLCAT
+
+/* Define to 1 if you have the declaration of `strlcpy', and to 0 if you
+   don't. */
+#undef HAVE_DECL_STRLCPY
+
+/* Define to 1 if you have the declaration of `XML_StopParser', and to 0 if
+   you don't. */
+#undef HAVE_DECL_XML_STOPPARSER
+
+/* Define to 1 if you have the <dlfcn.h> header file. */
+#undef HAVE_DLFCN_H
+
+/* Define to 1 if you have the `DSA_SIG_set0' function. */
+#undef HAVE_DSA_SIG_SET0
+
+/* Define to 1 if you have the <endian.h> header file. */
+#undef HAVE_ENDIAN_H
+
+/* Define to 1 if you have the `endprotoent' function. */
+#undef HAVE_ENDPROTOENT
+
+/* Define to 1 if you have the `endpwent' function. */
+#undef HAVE_ENDPWENT
+
+/* Define to 1 if you have the `endservent' function. */
+#undef HAVE_ENDSERVENT
+
+/* Define to 1 if you have the `ENGINE_cleanup' function. */
+#undef HAVE_ENGINE_CLEANUP
+
+/* Define to 1 if you have the `ERR_free_strings' function. */
+#undef HAVE_ERR_FREE_STRINGS
+
+/* Define to 1 if you have the `ERR_load_crypto_strings' function. */
+#undef HAVE_ERR_LOAD_CRYPTO_STRINGS
+
+/* Define to 1 if you have the `event_assign' function. */
+#undef HAVE_EVENT_ASSIGN
+
+/* Define to 1 if you have the `event_base_free' function. */
+#undef HAVE_EVENT_BASE_FREE
+
+/* Define to 1 if you have the `event_base_get_method' function. */
+#undef HAVE_EVENT_BASE_GET_METHOD
+
+/* Define to 1 if you have the `event_base_new' function. */
+#undef HAVE_EVENT_BASE_NEW
+
+/* Define to 1 if you have the `event_base_once' function. */
+#undef HAVE_EVENT_BASE_ONCE
+
+/* Define to 1 if you have the <event.h> header file. */
+#undef HAVE_EVENT_H
+
+/* Define to 1 if you have the `EVP_aes_256_cbc' function. */
+#undef HAVE_EVP_AES_256_CBC
+
+/* Define to 1 if you have the `EVP_cleanup' function. */
+#undef HAVE_EVP_CLEANUP
+
+/* Define to 1 if you have the `EVP_default_properties_is_fips_enabled'
+   function. */
+#undef HAVE_EVP_DEFAULT_PROPERTIES_IS_FIPS_ENABLED
+
+/* Define to 1 if you have the `EVP_DigestVerify' function. */
+#undef HAVE_EVP_DIGESTVERIFY
+
+/* Define to 1 if you have the `EVP_dss1' function. */
+#undef HAVE_EVP_DSS1
+
+/* Define to 1 if you have the `EVP_EncryptInit_ex' function. */
+#undef HAVE_EVP_ENCRYPTINIT_EX
+
+/* Define to 1 if you have the `EVP_MAC_CTX_set_params' function. */
+#undef HAVE_EVP_MAC_CTX_SET_PARAMS
+
+/* Define to 1 if you have the `EVP_MD_CTX_new' function. */
+#undef HAVE_EVP_MD_CTX_NEW
+
+/* Define to 1 if you have the `EVP_sha1' function. */
+#undef HAVE_EVP_SHA1
+
+/* Define to 1 if you have the `EVP_sha256' function. */
+#undef HAVE_EVP_SHA256
+
+/* Define to 1 if you have the `EVP_sha512' function. */
+#undef HAVE_EVP_SHA512
+
+/* Define to 1 if you have the `ev_default_loop' function. */
+#undef HAVE_EV_DEFAULT_LOOP
+
+/* Define to 1 if you have the `ev_loop' function. */
+#undef HAVE_EV_LOOP
+
+/* Define to 1 if you have the <expat.h> header file. */
+#undef HAVE_EXPAT_H
+
+/* Define to 1 if you have the `explicit_bzero' function. */
+#undef HAVE_EXPLICIT_BZERO
+
+/* Define to 1 if you have the `fcntl' function. */
+#undef HAVE_FCNTL
+
+/* Define to 1 if you have the `FIPS_mode' function. */
+#undef HAVE_FIPS_MODE
+
+/* Define to 1 if you have the `fork' function. */
+#undef HAVE_FORK
+
+/* Define to 1 if fseeko (and presumably ftello) exists and is declared. */
+#undef HAVE_FSEEKO
+
+/* Define to 1 if you have the `fsync' function. */
+#undef HAVE_FSYNC
+
+/* Whether getaddrinfo is available */
+#undef HAVE_GETADDRINFO
+
+/* Define to 1 if you have the `getauxval' function. */
+#undef HAVE_GETAUXVAL
+
+/* Define to 1 if you have the `getentropy' function. */
+#undef HAVE_GETENTROPY
+
+/* Define to 1 if you have the `getifaddrs' function. */
+#undef HAVE_GETIFADDRS
+
+/* Define to 1 if you have the <getopt.h> header file. */
+#undef HAVE_GETOPT_H
+
+/* Define to 1 if you have the `getpwnam' function. */
+#undef HAVE_GETPWNAM
+
+/* Define to 1 if you have the `getrlimit' function. */
+#undef HAVE_GETRLIMIT
+
+/* Define to 1 if you have the `gettid' function. */
+#undef HAVE_GETTID
+
+/* Define to 1 if you have the `glob' function. */
+#undef HAVE_GLOB
+
+/* Define to 1 if you have the <glob.h> header file. */
+#undef HAVE_GLOB_H
+
+/* Define to 1 if you have the `gmtime_r' function. */
+#undef HAVE_GMTIME_R
+
+/* Define to 1 if you have the <grp.h> header file. */
+#undef HAVE_GRP_H
+
+/* Define to 1 if you have the <hiredis/hiredis.h> header file. */
+#undef HAVE_HIREDIS_HIREDIS_H
+
+/* Define to 1 if you have the `HMAC_Init_ex' function. */
+#undef HAVE_HMAC_INIT_EX
+
+/* If we have htobe64 */
+#undef HAVE_HTOBE64
+
+/* Define to 1 if you have the <ifaddrs.h> header file. */
+#undef HAVE_IFADDRS_H
+
+/* Define to 1 if you have the `if_nametoindex' function. */
+#undef HAVE_IF_NAMETOINDEX
+
+/* Define to 1 if you have the `inet_aton' function. */
+#undef HAVE_INET_ATON
+
+/* Define to 1 if you have the `inet_ntop' function. */
+#undef HAVE_INET_NTOP
+
+/* Define to 1 if you have the `inet_pton' function. */
+#undef HAVE_INET_PTON
+
+/* Define to 1 if you have the `initgroups' function. */
+#undef HAVE_INITGROUPS
+
+/* Define to 1 if you have the <inttypes.h> header file. */
+#undef HAVE_INTTYPES_H
+
+/* if the function 'ioctlsocket' is available */
+#undef HAVE_IOCTLSOCKET
+
+/* Define to 1 if you have the <iphlpapi.h> header file. */
+#undef HAVE_IPHLPAPI_H
+
+/* Define to 1 if you have the `isblank' function. */
+#undef HAVE_ISBLANK
+
+/* Define to 1 if you have the `kill' function. */
+#undef HAVE_KILL
+
+/* Use portable libbsd functions */
+#undef HAVE_LIBBSD
+
+/* Define to 1 if you have the <libkern/OSByteOrder.h> header file. */
+#undef HAVE_LIBKERN_OSBYTEORDER_H
+
+/* Define if we have LibreSSL */
+#undef HAVE_LIBRESSL
+
+/* Define to 1 if you have the <linux/net_tstamp.h> header file. */
+#undef HAVE_LINUX_NET_TSTAMP_H
+
+/* Define to 1 if you have the `localtime_r' function. */
+#undef HAVE_LOCALTIME_R
+
+/* Define to 1 if you have the <login_cap.h> header file. */
+#undef HAVE_LOGIN_CAP_H
+
+/* If have GNU libc compatible malloc */
+#undef HAVE_MALLOC
+
+/* Define to 1 if you have the `memmove' function. */
+#undef HAVE_MEMMOVE
+
+/* Define to 1 if you have the <memory.h> header file. */
+#undef HAVE_MEMORY_H
+
+/* Define to 1 if you have the <netdb.h> header file. */
+#undef HAVE_NETDB_H
+
+/* Define to 1 if you have the <netinet/in.h> header file. */
+#undef HAVE_NETINET_IN_H
+
+/* Define to 1 if you have the <netinet/tcp.h> header file. */
+#undef HAVE_NETINET_TCP_H
+
+/* Define to 1 if you have the <netioapi.h> header file. */
+#undef HAVE_NETIOAPI_H
+
+/* Use libnettle for crypto */
+#undef HAVE_NETTLE
+
+/* Define to 1 if you have the <nettle/dsa-compat.h> header file. */
+#undef HAVE_NETTLE_DSA_COMPAT_H
+
+/* Define to 1 if you have the <nettle/eddsa.h> header file. */
+#undef HAVE_NETTLE_EDDSA_H
+
+/* Define to 1 if you have the <net/if.h> header file. */
+#undef HAVE_NET_IF_H
+
+/* Define this to use nghttp2 client. */
+#undef HAVE_NGHTTP2
+
+/* Define to 1 if you have the <nghttp2/nghttp2.h> header file. */
+#undef HAVE_NGHTTP2_NGHTTP2_H
+
+/* Use libnss for crypto */
+#undef HAVE_NSS
+
+/* Define to 1 if you have the `OpenSSL_add_all_digests' function. */
+#undef HAVE_OPENSSL_ADD_ALL_DIGESTS
+
+/* Define to 1 if you have the <openssl/bn.h> header file. */
+#undef HAVE_OPENSSL_BN_H
+
+/* Define to 1 if you have the `OPENSSL_config' function. */
+#undef HAVE_OPENSSL_CONFIG
+
+/* Define to 1 if you have the <openssl/conf.h> header file. */
+#undef HAVE_OPENSSL_CONF_H
+
+/* Define to 1 if you have the <openssl/core_names.h> header file. */
+#undef HAVE_OPENSSL_CORE_NAMES_H
+
+/* Define to 1 if you have the <openssl/dh.h> header file. */
+#undef HAVE_OPENSSL_DH_H
+
+/* Define to 1 if you have the <openssl/dsa.h> header file. */
+#undef HAVE_OPENSSL_DSA_H
+
+/* Define to 1 if you have the <openssl/engine.h> header file. */
+#undef HAVE_OPENSSL_ENGINE_H
+
+/* Define to 1 if you have the <openssl/err.h> header file. */
+#undef HAVE_OPENSSL_ERR_H
+
+/* Define to 1 if you have the `OPENSSL_init_crypto' function. */
+#undef HAVE_OPENSSL_INIT_CRYPTO
+
+/* Define to 1 if you have the `OPENSSL_init_ssl' function. */
+#undef HAVE_OPENSSL_INIT_SSL
+
+/* Define to 1 if you have the <openssl/param_build.h> header file. */
+#undef HAVE_OPENSSL_PARAM_BUILD_H
+
+/* Define to 1 if you have the <openssl/rand.h> header file. */
+#undef HAVE_OPENSSL_RAND_H
+
+/* Define to 1 if you have the <openssl/rsa.h> header file. */
+#undef HAVE_OPENSSL_RSA_H
+
+/* Define to 1 if you have the <openssl/ssl.h> header file. */
+#undef HAVE_OPENSSL_SSL_H
+
+/* Define to 1 if you have the `OSSL_PARAM_BLD_new' function. */
+#undef HAVE_OSSL_PARAM_BLD_NEW
+
+/* Define to 1 if you have the `poll' function. */
+#undef HAVE_POLL
+
+/* Define to 1 if you have the <poll.h> header file. */
+#undef HAVE_POLL_H
+
+/* Define if you have POSIX threads libraries and header files. */
+#undef HAVE_PTHREAD
+
+/* Have PTHREAD_PRIO_INHERIT. */
+#undef HAVE_PTHREAD_PRIO_INHERIT
+
+/* Define to 1 if the system has the type `pthread_rwlock_t'. */
+#undef HAVE_PTHREAD_RWLOCK_T
+
+/* Define to 1 if the system has the type `pthread_spinlock_t'. */
+#undef HAVE_PTHREAD_SPINLOCK_T
+
+/* Define to 1 if you have the <pwd.h> header file. */
+#undef HAVE_PWD_H
+
+/* Define if you have Python libraries and header files. */
+#undef HAVE_PYTHON
+
+/* Define to 1 if you have the `random' function. */
+#undef HAVE_RANDOM
+
+/* Define to 1 if you have the `RAND_cleanup' function. */
+#undef HAVE_RAND_CLEANUP
+
+/* If we have reallocarray(3) */
+#undef HAVE_REALLOCARRAY
+
+/* Define to 1 if you have the `recvmsg' function. */
+#undef HAVE_RECVMSG
+
+/* Define to 1 if you have the `sendmsg' function. */
+#undef HAVE_SENDMSG
+
+/* Define to 1 if you have the `setregid' function. */
+#undef HAVE_SETREGID
+
+/* Define to 1 if you have the `setresgid' function. */
+#undef HAVE_SETRESGID
+
+/* Define to 1 if you have the `setresuid' function. */
+#undef HAVE_SETRESUID
+
+/* Define to 1 if you have the `setreuid' function. */
+#undef HAVE_SETREUID
+
+/* Define to 1 if you have the `setrlimit' function. */
+#undef HAVE_SETRLIMIT
+
+/* Define to 1 if you have the `setsid' function. */
+#undef HAVE_SETSID
+
+/* Define to 1 if you have the `setusercontext' function. */
+#undef HAVE_SETUSERCONTEXT
+
+/* Define to 1 if you have the `SHA512_Update' function. */
+#undef HAVE_SHA512_UPDATE
+
+/* Define to 1 if you have the `shmget' function. */
+#undef HAVE_SHMGET
+
+/* Define to 1 if you have the `sigprocmask' function. */
+#undef HAVE_SIGPROCMASK
+
+/* Define to 1 if you have the `sleep' function. */
+#undef HAVE_SLEEP
+
+/* Define to 1 if you have the `snprintf' function. */
+#undef HAVE_SNPRINTF
+
+/* Define to 1 if you have the `socketpair' function. */
+#undef HAVE_SOCKETPAIR
+
+/* Using Solaris threads */
+#undef HAVE_SOLARIS_THREADS
+
+/* Define to 1 if you have the `srandom' function. */
+#undef HAVE_SRANDOM
+
+/* Define if you have the SSL libraries installed. */
+#undef HAVE_SSL
+
+/* Define to 1 if you have the `SSL_CTX_set_alpn_protos' function. */
+#undef HAVE_SSL_CTX_SET_ALPN_PROTOS
+
+/* Define to 1 if you have the `SSL_CTX_set_alpn_select_cb' function. */
+#undef HAVE_SSL_CTX_SET_ALPN_SELECT_CB
+
+/* Define to 1 if you have the `SSL_CTX_set_ciphersuites' function. */
+#undef HAVE_SSL_CTX_SET_CIPHERSUITES
+
+/* Define to 1 if you have the `SSL_CTX_set_security_level' function. */
+#undef HAVE_SSL_CTX_SET_SECURITY_LEVEL
+
+/* Define to 1 if you have the `SSL_CTX_set_tlsext_ticket_key_evp_cb'
+   function. */
+#undef HAVE_SSL_CTX_SET_TLSEXT_TICKET_KEY_EVP_CB
+
+/* Define to 1 if you have the `SSL_get0_alpn_selected' function. */
+#undef HAVE_SSL_GET0_ALPN_SELECTED
+
+/* Define to 1 if you have the `SSL_get0_peername' function. */
+#undef HAVE_SSL_GET0_PEERNAME
+
+/* Define to 1 if you have the `SSL_get1_peer_certificate' function. */
+#undef HAVE_SSL_GET1_PEER_CERTIFICATE
+
+/* Define to 1 if you have the `SSL_set1_host' function. */
+#undef HAVE_SSL_SET1_HOST
+
+/* Define to 1 if you have the <stdarg.h> header file. */
+#undef HAVE_STDARG_H
+
+/* Define to 1 if you have the <stdbool.h> header file. */
+#undef HAVE_STDBOOL_H
+
+/* Define to 1 if you have the <stdint.h> header file. */
+#undef HAVE_STDINT_H
+
+/* Define to 1 if you have the <stdlib.h> header file. */
+#undef HAVE_STDLIB_H
+
+/* Define to 1 if you have the `strftime' function. */
+#undef HAVE_STRFTIME
+
+/* Define to 1 if you have the <strings.h> header file. */
+#undef HAVE_STRINGS_H
+
+/* Define to 1 if you have the <string.h> header file. */
+#undef HAVE_STRING_H
+
+/* Define to 1 if you have the `strlcat' function. */
+#undef HAVE_STRLCAT
+
+/* Define to 1 if you have the `strlcpy' function. */
+#undef HAVE_STRLCPY
+
+/* Define to 1 if you have the `strptime' function. */
+#undef HAVE_STRPTIME
+
+/* Define to 1 if you have the `strsep' function. */
+#undef HAVE_STRSEP
+
+/* Define to 1 if `ipi_spec_dst' is a member of `struct in_pktinfo'. */
+#undef HAVE_STRUCT_IN_PKTINFO_IPI_SPEC_DST
+
+/* Define to 1 if `sun_len' is a member of `struct sockaddr_un'. */
+#undef HAVE_STRUCT_SOCKADDR_UN_SUN_LEN
+
+/* Define if you have Swig libraries and header files. */
+#undef HAVE_SWIG
+
+/* Define to 1 if you have the <syslog.h> header file. */
+#undef HAVE_SYSLOG_H
+
+/* Define to 1 if systemd should be used */
+#undef HAVE_SYSTEMD
+
+/* Define to 1 if you have the <sys/endian.h> header file. */
+#undef HAVE_SYS_ENDIAN_H
+
+/* Define to 1 if you have the <sys/ipc.h> header file. */
+#undef HAVE_SYS_IPC_H
+
+/* Define to 1 if you have the <sys/param.h> header file. */
+#undef HAVE_SYS_PARAM_H
+
+/* Define to 1 if you have the <sys/resource.h> header file. */
+#undef HAVE_SYS_RESOURCE_H
+
+/* Define to 1 if you have the <sys/select.h> header file. */
+#undef HAVE_SYS_SELECT_H
+
+/* Define to 1 if you have the <sys/sha2.h> header file. */
+#undef HAVE_SYS_SHA2_H
+
+/* Define to 1 if you have the <sys/shm.h> header file. */
+#undef HAVE_SYS_SHM_H
+
+/* Define to 1 if you have the <sys/socket.h> header file. */
+#undef HAVE_SYS_SOCKET_H
+
+/* Define to 1 if you have the <sys/stat.h> header file. */
+#undef HAVE_SYS_STAT_H
+
+/* Define to 1 if you have the <sys/sysctl.h> header file. */
+#undef HAVE_SYS_SYSCTL_H
+
+/* Define to 1 if you have the <sys/types.h> header file. */
+#undef HAVE_SYS_TYPES_H
+
+/* Define to 1 if you have the <sys/uio.h> header file. */
+#undef HAVE_SYS_UIO_H
+
+/* Define to 1 if you have the <sys/un.h> header file. */
+#undef HAVE_SYS_UN_H
+
+/* Define to 1 if you have the <sys/wait.h> header file. */
+#undef HAVE_SYS_WAIT_H
+
+/* Define to 1 if you have the <TargetConditionals.h> header file. */
+#undef HAVE_TARGETCONDITIONALS_H
+
+/* Define to 1 if you have the <time.h> header file. */
+#undef HAVE_TIME_H
+
+/* Define to 1 if you have the `tzset' function. */
+#undef HAVE_TZSET
+
+/* Define to 1 if you have the <unistd.h> header file. */
+#undef HAVE_UNISTD_H
+
+/* Define to 1 if you have the `usleep' function. */
+#undef HAVE_USLEEP
+
+/* Define to 1 if you have the `vfork' function. */
+#undef HAVE_VFORK
+
+/* Define to 1 if you have the <vfork.h> header file. */
+#undef HAVE_VFORK_H
+
+/* Define to 1 if you have the <windows.h> header file. */
+#undef HAVE_WINDOWS_H
+
+/* Using Windows threads */
+#undef HAVE_WINDOWS_THREADS
+
+/* Define to 1 if you have the <winsock2.h> header file. */
+#undef HAVE_WINSOCK2_H
+
+/* Define to 1 if `fork' works. */
+#undef HAVE_WORKING_FORK
+
+/* Define to 1 if `vfork' works. */
+#undef HAVE_WORKING_VFORK
+
+/* Define to 1 if you have the `writev' function. */
+#undef HAVE_WRITEV
+
+/* Define to 1 if you have the <ws2tcpip.h> header file. */
+#undef HAVE_WS2TCPIP_H
+
+/* Define to 1 if you have the `X509_VERIFY_PARAM_set1_host' function. */
+#undef HAVE_X509_VERIFY_PARAM_SET1_HOST
+
+/* Define to 1 if you have the `_beginthreadex' function. */
+#undef HAVE__BEGINTHREADEX
+
+/* If HMAC_Init_ex() returns void */
+#undef HMAC_INIT_EX_RETURNS_VOID
+
+/* if lex has yylex_destroy */
+#undef LEX_HAS_YYLEX_DESTROY
+
+/* Define to the sub-directory where libtool stores uninstalled libraries. */
+#undef LT_OBJDIR
+
+/* Define to the maximum message length to pass to syslog. */
+#undef MAXSYSLOGMSGLEN
+
+/* Define if memcmp() does not compare unsigned bytes */
+#undef MEMCMP_IS_BROKEN
+
+/* Define if mkdir has one argument. */
+#undef MKDIR_HAS_ONE_ARG
+
+/* Define if the network stack does not fully support nonblocking io (causes
+   lower performance). */
+#undef NONBLOCKING_IS_BROKEN
+
+/* Put -D_ALL_SOURCE define in config.h */
+#undef OMITTED__D_ALL_SOURCE
+
+/* Put -D_BSD_SOURCE define in config.h */
+#undef OMITTED__D_BSD_SOURCE
+
+/* Put -D_DEFAULT_SOURCE define in config.h */
+#undef OMITTED__D_DEFAULT_SOURCE
+
+/* Put -D_GNU_SOURCE define in config.h */
+#undef OMITTED__D_GNU_SOURCE
+
+/* Put -D_LARGEFILE_SOURCE=1 define in config.h */
+#undef OMITTED__D_LARGEFILE_SOURCE_1
+
+/* Put -D_POSIX_C_SOURCE=200112 define in config.h */
+#undef OMITTED__D_POSIX_C_SOURCE_200112
+
+/* Put -D_XOPEN_SOURCE=600 define in config.h */
+#undef OMITTED__D_XOPEN_SOURCE_600
+
+/* Put -D_XOPEN_SOURCE_EXTENDED=1 define in config.h */
+#undef OMITTED__D_XOPEN_SOURCE_EXTENDED_1
+
+/* Put -D__EXTENSIONS__ define in config.h */
+#undef OMITTED__D__EXTENSIONS__
+
+/* Define to the address where bug reports for this package should be sent. */
+#undef PACKAGE_BUGREPORT
+
+/* Define to the full name of this package. */
+#undef PACKAGE_NAME
+
+/* Define to the full name and version of this package. */
+#undef PACKAGE_STRING
+
+/* Define to the one symbol short name of this package. */
+#undef PACKAGE_TARNAME
+
+/* Define to the home page for this package. */
+#undef PACKAGE_URL
+
+/* Define to the version of this package. */
+#undef PACKAGE_VERSION
+
+/* default pidfile location */
+#undef PIDFILE
+
+/* Define to necessary symbol if this constant uses a non-standard name on
+   your system. */
+#undef PTHREAD_CREATE_JOINABLE
+
+/* Return type of signal handlers, but autoconf 2.70 says 'your code may
+   safely assume C89 semantics that RETSIGTYPE is void.' */
+#undef RETSIGTYPE
+
+/* if REUSEPORT is enabled by default */
+#undef REUSEPORT_DEFAULT
+
+/* default rootkey location */
+#undef ROOT_ANCHOR_FILE
+
+/* default rootcert location */
+#undef ROOT_CERT_FILE
+
+/* version number for resource files */
+#undef RSRC_PACKAGE_VERSION
+
+/* Directory to chdir to */
+#undef RUN_DIR
+
+/* Shared data */
+#undef SHARE_DIR
+
+/* The size of `pthread_t', as computed by sizeof. */
+#undef SIZEOF_PTHREAD_T
+
+/* The size of `size_t', as computed by sizeof. */
+#undef SIZEOF_SIZE_T
+
+/* The size of `time_t', as computed by sizeof. */
+#undef SIZEOF_TIME_T
+
+/* The size of `unsigned long', as computed by sizeof. */
+#undef SIZEOF_UNSIGNED_LONG
+
+/* define if (v)snprintf does not return length needed, (but length used) */
+#undef SNPRINTF_RET_BROKEN
+
+/* Define to 1 if libsodium supports sodium_set_misuse_handler */
+#undef SODIUM_MISUSE_HANDLER
+
+/* Define to 1 if you have the ANSI C header files. */
+#undef STDC_HEADERS
+
+/* use default strptime. */
+#undef STRPTIME_WORKS
+
+/* Use win32 resources and API */
+#undef UB_ON_WINDOWS
+
+/* the SYSLOG_FACILITY to use, default LOG_DAEMON */
+#undef UB_SYSLOG_FACILITY
+
+/* default username */
+#undef UB_USERNAME
+
+/* use to enable lightweight alloc assertions, for debug use */
+#undef UNBOUND_ALLOC_LITE
+
+/* use malloc not regions, for debug use */
+#undef UNBOUND_ALLOC_NONREGIONAL
+
+/* use statistics for allocs and frees, for debug use */
+#undef UNBOUND_ALLOC_STATS
+
+/* define this to enable debug checks. */
+#undef UNBOUND_DEBUG
+
+/* Define to 1 to use cachedb support */
+#undef USE_CACHEDB
+
+/* Define to 1 to enable dnscrypt support */
+#undef USE_DNSCRYPT
+
+/* Define to 1 to enable dnscrypt with xchacha20 support */
+#undef USE_DNSCRYPT_XCHACHA20
+
+/* Define to 1 to enable dnstap support */
+#undef USE_DNSTAP
+
+/* Define this to enable DSA support. */
+#undef USE_DSA
+
+/* Define this to enable ECDSA support. */
+#undef USE_ECDSA
+
+/* Define this to enable an EVP workaround for older openssl */
+#undef USE_ECDSA_EVP_WORKAROUND
+
+/* Define this to enable ED25519 support. */
+#undef USE_ED25519
+
+/* Define this to enable ED448 support. */
+#undef USE_ED448
+
+/* Define this to enable GOST support. */
+#undef USE_GOST
+
+/* Define to 1 to use ipsecmod support. */
+#undef USE_IPSECMOD
+
+/* Define to 1 to use ipset support */
+#undef USE_IPSET
+
+/* Define if you enable libevent */
+#undef USE_LIBEVENT
+
+/* Define this to enable use of /proc/sys/net/ipv4/ip_local_port_range as a
+   default outgoing port range. This is only for the libunbound on Linux and
+   does not affect unbound resolving daemon itself. This may severely limit
+   the number of available outgoing ports and thus decrease randomness. Define
+   this only when the target system restricts (e.g. some of SELinux enabled
+   distributions) the use of non-ephemeral ports. */
+#undef USE_LINUX_IP_LOCAL_PORT_RANGE
+
+/* Define if you want to use internal select based events */
+#undef USE_MINI_EVENT
+
+/* Define this to enable client TCP Fast Open. */
+#undef USE_MSG_FASTOPEN
+
+/* Define this to enable client TCP Fast Open. */
+#undef USE_OSX_MSG_FASTOPEN
+
+/* Define this to use hiredis client. */
+#undef USE_REDIS
+
+/* Define this to enable SHA1 support. */
+#undef USE_SHA1
+
+/* Define this to enable SHA256 and SHA512 support. */
+#undef USE_SHA2
+
+/* Enable extensions on AIX 3, Interix.  */
+#ifndef _ALL_SOURCE
+# undef _ALL_SOURCE
+#endif
+/* Enable GNU extensions on systems that have them.  */
+#ifndef _GNU_SOURCE
+# undef _GNU_SOURCE
+#endif
+/* Enable threading extensions on Solaris.  */
+#ifndef _POSIX_PTHREAD_SEMANTICS
+# undef _POSIX_PTHREAD_SEMANTICS
+#endif
+/* Enable extensions on HP NonStop.  */
+#ifndef _TANDEM_SOURCE
+# undef _TANDEM_SOURCE
+#endif
+/* Enable general extensions on Solaris.  */
+#ifndef __EXTENSIONS__
+# undef __EXTENSIONS__
+#endif
+
+
+/* Define this to enable server TCP Fast Open. */
+#undef USE_TCP_FASTOPEN
+
+/* Whether the windows socket API is used */
+#undef USE_WINSOCK
+
+/* the version of the windows API enabled */
+#undef WINVER
+
+/* Define if you want dynlib module. */
+#undef WITH_DYNLIBMODULE
+
+/* Define if you want Python module. */
+#undef WITH_PYTHONMODULE
+
+/* Define if you want PyUnbound. */
+#undef WITH_PYUNBOUND
+
+/* Define to 1 if `lex' declares `yytext' as a `char *' by default, not a
+   `char[]'. */
+#undef YYTEXT_POINTER
+
+/* Enable large inode numbers on Mac OS X 10.5.  */
+#ifndef _DARWIN_USE_64_BIT_INODE
+# define _DARWIN_USE_64_BIT_INODE 1
+#endif
+
+/* Number of bits in a file offset, on hosts where this is settable. */
+#undef _FILE_OFFSET_BITS
+
+/* Define to 1 to make fseeko visible on some hosts (e.g. glibc 2.2). */
+#undef _LARGEFILE_SOURCE
+
+/* Define for large files, on AIX-style hosts. */
+#undef _LARGE_FILES
+
+/* Define to 1 if on MINIX. */
+#undef _MINIX
+
+/* Enable for compile on Minix */
+#undef _NETBSD_SOURCE
+
+/* Define to 2 if the system does not provide POSIX.1 features except with
+   this defined. */
+#undef _POSIX_1_SOURCE
+
+/* Define to 1 if you need to in order for `stat' and other things to work. */
+#undef _POSIX_SOURCE
+
+/* defined to use gcc ansi snprintf and sscanf that understands %lld when
+   compiled for windows. */
+#undef __USE_MINGW_ANSI_STDIO
+
+/* Define to empty if `const' does not conform to ANSI C. */
+#undef const
+
+/* Define to `int' if <sys/types.h> doesn't define. */
+#undef gid_t
+
+/* in_addr_t */
+#undef in_addr_t
+
+/* in_port_t */
+#undef in_port_t
+
+/* Define to `__inline__' or `__inline' if that's what the C compiler
+   calls it, or to nothing if 'inline' is not supported under any name.  */
+#ifndef __cplusplus
+#undef inline
+#endif
+
+/* Define to `short' if <sys/types.h> does not define. */
+#undef int16_t
+
+/* Define to `int' if <sys/types.h> does not define. */
+#undef int32_t
+
+/* Define to `long long' if <sys/types.h> does not define. */
+#undef int64_t
+
+/* Define to `signed char' if <sys/types.h> does not define. */
+#undef int8_t
+
+/* Define if replacement function should be used. */
+#undef malloc
+
+/* Define to `long int' if <sys/types.h> does not define. */
+#undef off_t
+
+/* Define to `int' if <sys/types.h> does not define. */
+#undef pid_t
+
+/* Define to 'int' if not defined */
+#undef rlim_t
+
+/* Define to `unsigned int' if <sys/types.h> does not define. */
+#undef size_t
+
+/* Define to 'int' if not defined */
+#undef socklen_t
+
+/* Define to `int' if <sys/types.h> does not define. */
+#undef ssize_t
+
+/* Define to 'unsigned char if not defined */
+#undef u_char
+
+/* Define to `int' if <sys/types.h> doesn't define. */
+#undef uid_t
+
+/* Define to `unsigned short' if <sys/types.h> does not define. */
+#undef uint16_t
+
+/* Define to `unsigned int' if <sys/types.h> does not define. */
+#undef uint32_t
+
+/* Define to `unsigned long long' if <sys/types.h> does not define. */
+#undef uint64_t
+
+/* Define to `unsigned char' if <sys/types.h> does not define. */
+#undef uint8_t
+
+/* Define as `fork' if `vfork' does not work. */
+#undef vfork
+
+#if defined(OMITTED__D_GNU_SOURCE) && !defined(_GNU_SOURCE)
+#define _GNU_SOURCE 1
+#endif
+
+#if defined(OMITTED__D_BSD_SOURCE) && !defined(_BSD_SOURCE)
+#define _BSD_SOURCE 1
+#endif
+
+#if defined(OMITTED__D_DEFAULT_SOURCE) && !defined(_DEFAULT_SOURCE)
+#define _DEFAULT_SOURCE 1
+#endif
+
+#if defined(OMITTED__D__EXTENSIONS__) && !defined(__EXTENSIONS__)
+#define __EXTENSIONS__ 1
+#endif
+
+#if defined(OMITTED__D_POSIX_C_SOURCE_200112) && !defined(_POSIX_C_SOURCE)
+#define _POSIX_C_SOURCE 200112
+#endif
+
+#if defined(OMITTED__D_XOPEN_SOURCE_600) && !defined(_XOPEN_SOURCE)
+#define _XOPEN_SOURCE 600
+#endif
+
+#if defined(OMITTED__D_XOPEN_SOURCE_EXTENDED_1) && !defined(_XOPEN_SOURCE_EXTENDED)
+#define _XOPEN_SOURCE_EXTENDED 1
+#endif
+
+#if defined(OMITTED__D_ALL_SOURCE) && !defined(_ALL_SOURCE)
+#define _ALL_SOURCE 1
+#endif
+
+#if defined(OMITTED__D_LARGEFILE_SOURCE_1) && !defined(_LARGEFILE_SOURCE)
+#define _LARGEFILE_SOURCE 1
+#endif
+
+
+
+
+#ifndef _OPENBSD_SOURCE
+#define _OPENBSD_SOURCE 1
+#endif
+
+#ifndef UNBOUND_DEBUG
+# ifndef NDEBUG
+#  define NDEBUG
+# endif
+#endif
+
+/** Use small-ldns codebase */
+#define USE_SLDNS 1
+#ifdef HAVE_SSL
+#  define LDNS_BUILD_CONFIG_HAVE_SSL 1
+#endif
+
+#include <stdio.h>
+#include <string.h>
+#include <unistd.h>
+#include <assert.h>
+
+#if STDC_HEADERS
+#include <stdlib.h>
+#include <stddef.h>
+#endif
+
+#ifdef HAVE_STDARG_H
+#include <stdarg.h>
+#endif
+
+#ifdef HAVE_STDINT_H
+#include <stdint.h>
+#endif
+
+#include <errno.h>
+
+#if HAVE_SYS_PARAM_H
+#include <sys/param.h>
+#endif
+
+#ifdef HAVE_SYS_SOCKET_H
+#include <sys/socket.h>
+#endif
+
+#ifdef HAVE_SYS_UIO_H
+#include <sys/uio.h>
+#endif
+
+#ifdef HAVE_NETINET_IN_H
+#include <netinet/in.h>
+#endif
+
+#ifdef HAVE_NETINET_TCP_H
+#include <netinet/tcp.h>
+#endif
+
+#ifdef HAVE_ARPA_INET_H
+#include <arpa/inet.h>
+#endif
+
+#ifdef HAVE_WINSOCK2_H
+#include <winsock2.h>
+#endif
+
+#ifdef HAVE_WS2TCPIP_H
+#include <ws2tcpip.h>
+#endif
+
+#if !defined(USE_WINSOCK) || !defined(HAVE_SNPRINTF) || defined(SNPRINTF_RET_BROKEN) || defined(__USE_MINGW_ANSI_STDIO)
+#define ARG_LL "%ll"
+#else
+#define ARG_LL "%I64"
+#endif
+
+#ifndef AF_LOCAL
+#define AF_LOCAL AF_UNIX
+#endif
+
+
+
+#ifdef HAVE_ATTR_FORMAT
+#  define ATTR_FORMAT(archetype, string_index, first_to_check) \
+    __attribute__ ((format (archetype, string_index, first_to_check)))
+#else /* !HAVE_ATTR_FORMAT */
+#  define ATTR_FORMAT(archetype, string_index, first_to_check) /* empty */
+#endif /* !HAVE_ATTR_FORMAT */
+
+
+#if defined(DOXYGEN)
+#  define ATTR_UNUSED(x)  x
+#elif defined(__cplusplus)
+#  define ATTR_UNUSED(x)
+#elif defined(HAVE_ATTR_UNUSED)
+#  define ATTR_UNUSED(x)  x __attribute__((unused))
+#else /* !HAVE_ATTR_UNUSED */
+#  define ATTR_UNUSED(x)  x
+#endif /* !HAVE_ATTR_UNUSED */
+
+
+#ifndef HAVE_FSEEKO
+#define fseeko fseek
+#define ftello ftell
+#endif /* HAVE_FSEEKO */
+
+
+#ifndef MAXHOSTNAMELEN
+#define MAXHOSTNAMELEN 256
+#endif
+
+#if !defined(HAVE_SNPRINTF) || defined(SNPRINTF_RET_BROKEN)
+#define snprintf snprintf_unbound
+#define vsnprintf vsnprintf_unbound
+#include <stdarg.h>
+int snprintf (char *str, size_t count, const char *fmt, ...);
+int vsnprintf (char *str, size_t count, const char *fmt, va_list arg);
+#endif /* HAVE_SNPRINTF or SNPRINTF_RET_BROKEN */
+
+#ifndef HAVE_INET_PTON
+#define inet_pton inet_pton_unbound
+int inet_pton(int af, const char* src, void* dst);
+#endif /* HAVE_INET_PTON */
+
+
+#ifndef HAVE_INET_NTOP
+#define inet_ntop inet_ntop_unbound
+const char *inet_ntop(int af, const void *src, char *dst, size_t size);
+#endif
+
+
+#ifndef HAVE_INET_ATON
+#define inet_aton inet_aton_unbound
+int inet_aton(const char *cp, struct in_addr *addr);
+#endif
+
+
+#ifndef HAVE_MEMMOVE
+#define memmove memmove_unbound
+void *memmove(void *dest, const void *src, size_t n);
+#endif
+
+
+#ifndef HAVE_STRLCAT
+#define strlcat strlcat_unbound
+size_t strlcat(char *dst, const char *src, size_t siz);
+#endif
+
+
+#ifndef HAVE_STRLCPY
+#define strlcpy strlcpy_unbound
+size_t strlcpy(char *dst, const char *src, size_t siz);
+#endif
+
+
+#ifndef HAVE_GMTIME_R
+#define gmtime_r gmtime_r_unbound
+struct tm *gmtime_r(const time_t *timep, struct tm *result);
+#endif
+
+
+#ifndef HAVE_REALLOCARRAY
+#define reallocarray reallocarrayunbound
+void* reallocarray(void *ptr, size_t nmemb, size_t size);
+#endif
+
+
+#if !defined(HAVE_SLEEP) || defined(HAVE_WINDOWS_H)
+#define sleep(x) Sleep((x)*1000) /* on win32 */
+#endif /* HAVE_SLEEP */
+
+
+#ifndef HAVE_USLEEP
+#define usleep(x) Sleep((x)/1000 + 1) /* on win32 */
+#endif /* HAVE_USLEEP */
+
+
+#ifndef HAVE_RANDOM
+#define random rand /* on win32, for tests only (bad random) */
+#endif /* HAVE_RANDOM */
+
+
+#ifndef HAVE_SRANDOM
+#define srandom(x) srand(x) /* on win32, for tests only (bad random) */
+#endif /* HAVE_SRANDOM */
+
+
+/* detect if we need to cast to unsigned int for FD_SET to avoid warnings */
+#ifdef HAVE_WINSOCK2_H
+#define FD_SET_T (u_int)
+#else
+#define FD_SET_T
+#endif
+
+
+#ifndef IPV6_MIN_MTU
+#define IPV6_MIN_MTU 1280
+#endif /* IPV6_MIN_MTU */
+
+
+#ifdef MEMCMP_IS_BROKEN
+#include "compat/memcmp.h"
+#define memcmp memcmp_unbound
+int memcmp(const void *x, const void *y, size_t n);
+#endif
+
+
+
+#ifndef HAVE_CTIME_R
+#define ctime_r unbound_ctime_r
+char *ctime_r(const time_t *timep, char *buf);
+#endif
+
+#ifndef HAVE_STRSEP
+#define strsep unbound_strsep
+char *strsep(char **stringp, const char *delim);
+#endif
+
+#ifndef HAVE_ISBLANK
+#define isblank unbound_isblank
+int isblank(int c);
+#endif
+
+#ifndef HAVE_EXPLICIT_BZERO
+#define explicit_bzero unbound_explicit_bzero
+void explicit_bzero(void* buf, size_t len);
+#endif
+
+#if defined(HAVE_INET_NTOP) && !HAVE_DECL_INET_NTOP
+const char *inet_ntop(int af, const void *src, char *dst, size_t size);
+#endif
+
+#if defined(HAVE_INET_PTON) && !HAVE_DECL_INET_PTON
+int inet_pton(int af, const char* src, void* dst);
+#endif
+
+#if !defined(HAVE_STRPTIME) || !defined(STRPTIME_WORKS)
+#define strptime unbound_strptime
+struct tm;
+char *strptime(const char *s, const char *format, struct tm *tm);
+#endif
+
+#if !HAVE_DECL_REALLOCARRAY
+void *reallocarray(void *ptr, size_t nmemb, size_t size);
+#endif
+
+#ifdef HAVE_LIBBSD
+#include <bsd/string.h>
+#include <bsd/stdlib.h>
+#endif
+
+#ifdef HAVE_LIBRESSL
+#  if !HAVE_DECL_STRLCPY
+size_t strlcpy(char *dst, const char *src, size_t siz);
+#  endif
+#  if !HAVE_DECL_STRLCAT
+size_t strlcat(char *dst, const char *src, size_t siz);
+#  endif
+#  if !HAVE_DECL_ARC4RANDOM && defined(HAVE_ARC4RANDOM)
+uint32_t arc4random(void);
+#  endif
+#  if !HAVE_DECL_ARC4RANDOM_UNIFORM && defined(HAVE_ARC4RANDOM_UNIFORM)
+uint32_t arc4random_uniform(uint32_t upper_bound);
+#  endif
+#endif /* HAVE_LIBRESSL */
+#ifndef HAVE_ARC4RANDOM
+int getentropy(void* buf, size_t len);
+uint32_t arc4random(void);
+void arc4random_buf(void* buf, size_t n);
+void _ARC4_LOCK(void);
+void _ARC4_UNLOCK(void);
+void _ARC4_LOCK_DESTROY(void);
+#endif
+#ifndef HAVE_ARC4RANDOM_UNIFORM
+uint32_t arc4random_uniform(uint32_t upper_bound);
+#endif
+#ifdef COMPAT_SHA512
+#ifndef SHA512_DIGEST_LENGTH
+#define SHA512_BLOCK_LENGTH		128
+#define SHA512_DIGEST_LENGTH		64
+#define SHA512_DIGEST_STRING_LENGTH	(SHA512_DIGEST_LENGTH * 2 + 1)
+typedef struct _SHA512_CTX {
+	uint64_t	state[8];
+	uint64_t	bitcount[2];
+	uint8_t	buffer[SHA512_BLOCK_LENGTH];
+} SHA512_CTX;
+#endif /* SHA512_DIGEST_LENGTH */
+void SHA512_Init(SHA512_CTX*);
+void SHA512_Update(SHA512_CTX*, void*, size_t);
+void SHA512_Final(uint8_t[SHA512_DIGEST_LENGTH], SHA512_CTX*);
+unsigned char *SHA512(void* data, unsigned int data_len, unsigned char *digest);
+#endif /* COMPAT_SHA512 */
+
+
+
+#if defined(HAVE_EVENT_H) && !defined(HAVE_EVENT_BASE_ONCE) && !(defined(HAVE_EV_LOOP) || defined(HAVE_EV_DEFAULT_LOOP)) && (defined(HAVE_PTHREAD) || defined(HAVE_SOLARIS_THREADS))
+   /* using version of libevent that is not threadsafe. */
+#  define LIBEVENT_SIGNAL_PROBLEM 1
+#endif
+
+#ifndef CHECKED_INET6
+#  define CHECKED_INET6
+#  ifdef AF_INET6
+#    define INET6
+#  else
+#    define AF_INET6        28
+#  endif
+#endif /* CHECKED_INET6 */
+
+#ifndef HAVE_GETADDRINFO
+struct sockaddr_storage;
+#include "compat/fake-rfc2553.h"
+#endif
+
+#ifdef UNBOUND_ALLOC_STATS
+#  define malloc(s) unbound_stat_malloc_log(s, __FILE__, __LINE__, __func__)
+#  define calloc(n,s) unbound_stat_calloc_log(n, s, __FILE__, __LINE__, __func__)
+#  define free(p) unbound_stat_free_log(p, __FILE__, __LINE__, __func__)
+#  define realloc(p,s) unbound_stat_realloc_log(p, s, __FILE__, __LINE__, __func__)
+void *unbound_stat_malloc(size_t size);
+void *unbound_stat_calloc(size_t nmemb, size_t size);
+void unbound_stat_free(void *ptr);
+void *unbound_stat_realloc(void *ptr, size_t size);
+void *unbound_stat_malloc_log(size_t size, const char* file, int line,
+	const char* func);
+void *unbound_stat_calloc_log(size_t nmemb, size_t size, const char* file,
+	int line, const char* func);
+void unbound_stat_free_log(void *ptr, const char* file, int line,
+	const char* func);
+void *unbound_stat_realloc_log(void *ptr, size_t size, const char* file,
+	int line, const char* func);
+#elif defined(UNBOUND_ALLOC_LITE)
+#  include "util/alloc.h"
+#endif /* UNBOUND_ALLOC_LITE and UNBOUND_ALLOC_STATS */
+
+/** default port for DNS traffic. */
+#define UNBOUND_DNS_PORT 53
+/** default port for DNS over TLS traffic. */
+#define UNBOUND_DNS_OVER_TLS_PORT 853
+/** default port for DNS over HTTPS traffic. */
+#define UNBOUND_DNS_OVER_HTTPS_PORT 443
+/** default port for unbound control traffic, registered port with IANA,
+    ub-dns-control  8953/tcp    unbound dns nameserver control */
+#define UNBOUND_CONTROL_PORT 8953
+/** the version of unbound-control that this software implements */
+#define UNBOUND_CONTROL_VERSION 1
+
+
diff --git a/contrib/unbound/config.sub b/contrib/unbound/config.sub
index baf1512b3c03..6ae25027537a 100755
--- a/contrib/unbound/config.sub
+++ b/contrib/unbound/config.sub
@@ -1,10 +1,10 @@
 #! /bin/sh
 # Configuration validation subroutine script.
-#   Copyright 1992-2022 Free Software Foundation, Inc.
+#   Copyright 1992-2023 Free Software Foundation, Inc.
 
 # shellcheck disable=SC2006,SC2268 # see below for rationale
 
-timestamp='2022-09-17'
+timestamp='2023-07-31'
 
 # This file is free software; you can redistribute it and/or modify it
 # under the terms of the GNU General Public License as published by
@@ -76,13 +76,13 @@ Report bugs and patches to <config-patches@gnu.org>."
 version="\
 GNU config.sub ($timestamp)
 
-Copyright 1992-2022 Free Software Foundation, Inc.
+Copyright 1992-2023 Free Software Foundation, Inc.
 
 This is free software; see the source for copying conditions.  There is NO
 warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE."
 
 help="
-Try \`$me --help' for more information."
+Try '$me --help' for more information."
 
 # Parse command line
 while test $# -gt 0 ; do
@@ -130,7 +130,7 @@ IFS=$saved_IFS
 # Separate into logical components for further validation
 case $1 in
 	*-*-*-*-*)
-		echo Invalid configuration \`"$1"\': more than four components >&2
+		echo "Invalid configuration '$1': more than four components" >&2
 		exit 1
 		;;
 	*-*-*-*)
@@ -145,7 +145,8 @@ case $1 in
 			nto-qnx* | linux-* | uclinux-uclibc* \
 			| uclinux-gnu* | kfreebsd*-gnu* | knetbsd*-gnu* | netbsd*-gnu* \
 			| netbsd*-eabi* | kopensolaris*-gnu* | cloudabi*-eabi* \
-			| storm-chaos* | os2-emx* | rtmk-nova* | managarm-*)
+			| storm-chaos* | os2-emx* | rtmk-nova* | managarm-* \
+			| windows-* )
 				basic_machine=$field1
 				basic_os=$maybe_os
 				;;
@@ -943,7 +944,7 @@ $basic_machine
 EOF
 		IFS=$saved_IFS
 		;;
-	# We use `pc' rather than `unknown'
+	# We use 'pc' rather than 'unknown'
 	# because (1) that's what they normally are, and
 	# (2) the word "unknown" tends to confuse beginning users.
 	i*86 | x86_64)
@@ -1075,7 +1076,7 @@ case $cpu-$vendor in
 	pentium-* | p5-* | k5-* | k6-* | nexgen-* | viac3-*)
 		cpu=i586
 		;;
-	pentiumpro-* | p6-* | 6x86-* | athlon-* | athalon_*-*)
+	pentiumpro-* | p6-* | 6x86-* | athlon-* | athlon_*-*)
 		cpu=i686
 		;;
 	pentiumii-* | pentium2-* | pentiumiii-* | pentium3-*)
@@ -1205,6 +1206,7 @@ case $cpu-$vendor in
 			| i370 | i*86 | i860 | i960 | ia16 | ia64 \
 			| ip2k | iq2000 \
 			| k1om \
+			| kvx \
 			| le32 | le64 \
 			| lm32 \
 			| loongarch32 | loongarch64 \
@@ -1213,31 +1215,7 @@ case $cpu-$vendor in
 			| m6811 | m68hc11 | m6812 | m68hc12 | m68hcs12x \
 			| m88110 | m88k | maxq | mb | mcore | mep | metag \
 			| microblaze | microblazeel \
-			| mips | mipsbe | mipseb | mipsel | mipsle \
-			| mips16 \
-			| mips64 | mips64eb | mips64el \
-			| mips64octeon | mips64octeonel \
-			| mips64orion | mips64orionel \
-			| mips64r5900 | mips64r5900el \
-			| mips64vr | mips64vrel \
-			| mips64vr4100 | mips64vr4100el \
-			| mips64vr4300 | mips64vr4300el \
-			| mips64vr5000 | mips64vr5000el \
-			| mips64vr5900 | mips64vr5900el \
-			| mipsisa32 | mipsisa32el \
-			| mipsisa32r2 | mipsisa32r2el \
-			| mipsisa32r3 | mipsisa32r3el \
-			| mipsisa32r5 | mipsisa32r5el \
-			| mipsisa32r6 | mipsisa32r6el \
-			| mipsisa64 | mipsisa64el \
-			| mipsisa64r2 | mipsisa64r2el \
-			| mipsisa64r3 | mipsisa64r3el \
-			| mipsisa64r5 | mipsisa64r5el \
-			| mipsisa64r6 | mipsisa64r6el \
-			| mipsisa64sb1 | mipsisa64sb1el \
-			| mipsisa64sr71k | mipsisa64sr71kel \
-			| mipsr5900 | mipsr5900el \
-			| mipstx39 | mipstx39el \
+			| mips* \
 			| mmix \
 			| mn10200 | mn10300 \
 			| moxie \
@@ -1285,7 +1263,7 @@ case $cpu-$vendor in
 				;;
 
 			*)
-				echo Invalid configuration \`"$1"\': machine \`"$cpu-$vendor"\' not recognized 1>&2
+				echo "Invalid configuration '$1': machine '$cpu-$vendor' not recognized" 1>&2
 				exit 1
 				;;
 		esac
@@ -1732,7 +1710,7 @@ case $os in
 	     | hpux* | unos* | osf* | luna* | dgux* | auroraux* | solaris* \
 	     | sym* |  plan9* | psp* | sim* | xray* | os68k* | v88r* \
 	     | hiux* | abug | nacl* | netware* | windows* \
-	     | os9* | macos* | osx* | ios* \
+	     | os9* | macos* | osx* | ios* | tvos* | watchos* \
 	     | mpw* | magic* | mmixware* | mon960* | lnews* \
 	     | amigaos* | amigados* | msdos* | newsos* | unicos* | aof* \
 	     | aos* | aros* | cloudabi* | sortix* | twizzler* \
@@ -1758,7 +1736,7 @@ case $os in
 	     | onefs* | tirtos* | phoenix* | fuchsia* | redox* | bme* \
 	     | midnightbsd* | amdhsa* | unleashed* | emscripten* | wasi* \
 	     | nsk* | powerunix* | genode* | zvmoe* | qnx* | emx* | zephyr* \
-	     | fiwix* | mlibc* )
+	     | fiwix* | mlibc* | cos* | mbr* )
 		;;
 	# This one is extra strict with allowed versions
 	sco3.2v2 | sco3.2v[4-9]* | sco5v6*)
@@ -1766,11 +1744,11 @@ case $os in
 		;;
 	none)
 		;;
-	kernel* )
+	kernel* | msvc* )
 		# Restricted further below
 		;;
 	*)
-		echo Invalid configuration \`"$1"\': OS \`"$os"\' not recognized 1>&2
+		echo "Invalid configuration '$1': OS '$os' not recognized" 1>&2
 		exit 1
 		;;
 esac
@@ -1785,18 +1763,24 @@ case $kernel-$os in
 		;;
 	managarm-mlibc* | managarm-kernel* )
 		;;
+	windows*-gnu* | windows*-msvc*)
+		;;
 	-dietlibc* | -newlib* | -musl* | -relibc* | -uclibc* | -mlibc* )
 		# These are just libc implementations, not actual OSes, and thus
 		# require a kernel.
-		echo "Invalid configuration \`$1': libc \`$os' needs explicit kernel." 1>&2
+		echo "Invalid configuration '$1': libc '$os' needs explicit kernel." 1>&2
 		exit 1
 		;;
 	-kernel* )
-		echo "Invalid configuration \`$1': \`$os' needs explicit kernel." 1>&2
+		echo "Invalid configuration '$1': '$os' needs explicit kernel." 1>&2
 		exit 1
 		;;
 	*-kernel* )
-		echo "Invalid configuration \`$1': \`$kernel' does not support \`$os'." 1>&2
+		echo "Invalid configuration '$1': '$kernel' does not support '$os'." 1>&2
+		exit 1
+		;;
+	*-msvc* )
+		echo "Invalid configuration '$1': '$os' needs 'windows'." 1>&2
 		exit 1
 		;;
 	kfreebsd*-gnu* | kopensolaris*-gnu*)
@@ -1809,11 +1793,15 @@ case $kernel-$os in
 		;;
 	*-eabi* | *-gnueabi*)
 		;;
+	none-coff* | none-elf*)
+		# None (no kernel, i.e. freestanding / bare metal),
+		# can be paired with an output format "OS"
+		;;
 	-*)
 		# Blank kernel with real OS is always fine.
 		;;
 	*-*)
-		echo "Invalid configuration \`$1': Kernel \`$kernel' not known to work with OS \`$os'." 1>&2
+		echo "Invalid configuration '$1': Kernel '$kernel' not known to work with OS '$os'." 1>&2
 		exit 1
 		;;
 esac
diff --git a/contrib/unbound/configure b/contrib/unbound/configure
index 5823e49f2f80..a77094ff7671 100755
--- a/contrib/unbound/configure
+++ b/contrib/unbound/configure
@@ -1,6 +1,6 @@
 #! /bin/sh
 # Guess values for system-dependent variables and create Makefiles.
-# Generated by GNU Autoconf 2.69 for unbound 1.17.1.
+# Generated by GNU Autoconf 2.69 for unbound 1.18.0.
 #
 # Report bugs to <unbound-bugs@nlnetlabs.nl or https://github.com/NLnetLabs/unbound/issues>.
 #
@@ -591,8 +591,8 @@ MAKEFLAGS=
 # Identity of this package.
 PACKAGE_NAME='unbound'
 PACKAGE_TARNAME='unbound'
-PACKAGE_VERSION='1.17.1'
-PACKAGE_STRING='unbound 1.17.1'
+PACKAGE_VERSION='1.18.0'
+PACKAGE_STRING='unbound 1.18.0'
 PACKAGE_BUGREPORT='unbound-bugs@nlnetlabs.nl or https://github.com/NLnetLabs/unbound/issues'
 PACKAGE_URL=''
 
@@ -1477,7 +1477,7 @@ if test "$ac_init_help" = "long"; then
   # Omit some internal or obsolete options to make the list less imposing.
   # This message is too long to be a string in the A/UX 3.1 sh.
   cat <<_ACEOF
-\`configure' configures unbound 1.17.1 to adapt to many kinds of systems.
+\`configure' configures unbound 1.18.0 to adapt to many kinds of systems.
 
 Usage: $0 [OPTION]... [VAR=VALUE]...
 
@@ -1543,7 +1543,7 @@ fi
 
 if test -n "$ac_init_help"; then
   case $ac_init_help in
-     short | recursive ) echo "Configuration of unbound 1.17.1:";;
+     short | recursive ) echo "Configuration of unbound 1.18.0:";;
    esac
   cat <<\_ACEOF
 
@@ -1785,7 +1785,7 @@ fi
 test -n "$ac_init_help" && exit $ac_status
 if $ac_init_version; then
   cat <<\_ACEOF
-unbound configure 1.17.1
+unbound configure 1.18.0
 generated by GNU Autoconf 2.69
 
 Copyright (C) 2012 Free Software Foundation, Inc.
@@ -2494,7 +2494,7 @@ cat >config.log <<_ACEOF
 This file contains any messages produced by compilers while
 running configure, to aid debugging if configure makes a mistake.
 
-It was created by unbound $as_me 1.17.1, which was
+It was created by unbound $as_me 1.18.0, which was
 generated by GNU Autoconf 2.69.  Invocation command line was
 
   $ $0 $@
@@ -2844,13 +2844,13 @@ ac_compiler_gnu=$ac_cv_c_compiler_gnu
 
 UNBOUND_VERSION_MAJOR=1
 
-UNBOUND_VERSION_MINOR=17
+UNBOUND_VERSION_MINOR=18
 
-UNBOUND_VERSION_MICRO=1
+UNBOUND_VERSION_MICRO=0
 
 
 LIBUNBOUND_CURRENT=9
-LIBUNBOUND_REVISION=21
+LIBUNBOUND_REVISION=22
 LIBUNBOUND_AGE=1
 # 1.0.0 had 0:12:0
 # 1.0.1 had 0:13:0
@@ -2939,6 +2939,7 @@ LIBUNBOUND_AGE=1
 # 1.16.3 had 9:19:1
 # 1.17.0 had 9:20:1
 # 1.17.1 had 9:21:1
+# 1.18.0 had 9:22:1
 
 #   Current  -- the number of the binary API that we're implementing
 #   Revision -- which iteration of the implementation of the binary
@@ -5145,7 +5146,7 @@ ac_compiler_gnu=$ac_cv_c_compiler_gnu
 
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking $CC dependency flag" >&5
 $as_echo_n "checking $CC dependency flag... " >&6; }
-echo 'void f(){}' >conftest.c
+echo 'void f(void){}' >conftest.c
 if test "`$CC -MM conftest.c 2>&1`" = "conftest.o: conftest.c"; then
 	DEPFLAG="-MM"
 else
@@ -5327,7 +5328,7 @@ echo '
 #include <getopt.h>
 #endif
 
-int test() {
+int test(void) {
 	int a;
 	char **opts = NULL;
 	struct timeval tv;
@@ -5348,7 +5349,7 @@ int test() {
 	return a;
 }
 ' > conftest.c
-echo 'void f(){}' >>conftest.c
+echo 'void f(void){}' >>conftest.c
 if test -z "`$CC $CPPFLAGS $CFLAGS $ERRFLAG -c conftest.c 2>&1`"; then
 eval "cv_prog_cc_flag_needed_$cache=no"
 else
@@ -5418,7 +5419,7 @@ echo '
 #include <getopt.h>
 #endif
 
-int test() {
+int test(void) {
 	int a;
 	char **opts = NULL;
 	struct timeval tv;
@@ -5439,7 +5440,7 @@ int test() {
 	return a;
 }
 ' > conftest.c
-echo 'void f(){}' >>conftest.c
+echo 'void f(void){}' >>conftest.c
 if test -z "`$CC $CPPFLAGS $CFLAGS $ERRFLAG -c conftest.c 2>&1`"; then
 eval "cv_prog_cc_flag_needed_$cache=no"
 else
@@ -5498,12 +5499,12 @@ else
 echo '
 #include <stdbool.h>
 #include <ctype.h>
-int test() {
+int test(void) {
         int a = 0;
         return a;
 }
 ' > conftest.c
-echo 'void f(){}' >>conftest.c
+echo 'void f(void){}' >>conftest.c
 if test -z "`$CC $CPPFLAGS $CFLAGS $ERRFLAG -c conftest.c 2>&1`"; then
 eval "cv_prog_cc_flag_needed_$cache=no"
 else
@@ -5562,13 +5563,13 @@ else
 echo '
 #include <ctype.h>
 
-int test() {
+int test(void) {
         int a;
         a = isascii(32);
         return a;
 }
 ' > conftest.c
-echo 'void f(){}' >>conftest.c
+echo 'void f(void){}' >>conftest.c
 if test -z "`$CC $CPPFLAGS $CFLAGS $ERRFLAG -c conftest.c 2>&1`"; then
 eval "cv_prog_cc_flag_needed_$cache=no"
 else
@@ -5627,13 +5628,13 @@ else
 echo '
 #include <netinet/in.h>
 
-int test() {
+int test(void) {
         struct in6_pktinfo inf;
 	int a = (int)sizeof(inf);
         return a;
 }
 ' > conftest.c
-echo 'void f(){}' >>conftest.c
+echo 'void f(void){}' >>conftest.c
 if test -z "`$CC $CPPFLAGS $CFLAGS $ERRFLAG -c conftest.c 2>&1`"; then
 eval "cv_prog_cc_flag_needed_$cache=no"
 else
@@ -5695,13 +5696,13 @@ else
 echo '
 #include <unistd.h>
 
-int test() {
+int test(void) {
 	int a = setresgid(0,0,0);
 	a = setresuid(0,0,0);
         return a;
 }
 ' > conftest.c
-echo 'void f(){}' >>conftest.c
+echo 'void f(void){}' >>conftest.c
 if test -z "`$CC $CPPFLAGS $CFLAGS $ERRFLAG -c conftest.c 2>&1`"; then
 eval "cv_prog_cc_flag_needed_$cache=no"
 else
@@ -5764,7 +5765,7 @@ echo '
 #endif
 #include <netdb.h>
 
-int test() {
+int test(void) {
         int a = 0;
         char *t;
         time_t time = 0;
@@ -5777,7 +5778,7 @@ int test() {
         return a;
 }
 ' > conftest.c
-echo 'void f(){}' >>conftest.c
+echo 'void f(void){}' >>conftest.c
 if test -z "`$CC $CPPFLAGS $CFLAGS $ERRFLAG -c conftest.c 2>&1`"; then
 eval "cv_prog_cc_flag_needed_$cache=no"
 else
@@ -5846,7 +5847,7 @@ echo '
 #include <getopt.h>
 #endif
 
-int test() {
+int test(void) {
         int a;
         char **opts = NULL;
         struct timeval tv;
@@ -5859,7 +5860,7 @@ int test() {
         return a;
 }
 ' > conftest.c
-echo 'void f(){}' >>conftest.c
+echo 'void f(void){}' >>conftest.c
 if test -z "`$CC $CPPFLAGS $CFLAGS $ERRFLAG -c conftest.c 2>&1`"; then
 eval "cv_prog_cc_flag_needed_$cache=no"
 else
@@ -6610,6 +6611,11 @@ $as_echo "no" >&6; };
 	fi
 
 fi
+if test "$LEX" = "" -o "$LEX" = ":"; then
+	if test ! -f util/configlexer.c; then
+		as_fn_error $? "no lex and no util/configlexer.c: need flex and bison to compile from source repository." "$LINENO" 5
+	fi
+fi
 for ac_prog in 'bison -y' byacc
 do
   # Extract the first word of "$ac_prog", so it can be a program name with args.
@@ -6653,6 +6659,11 @@ fi
 done
 test -n "$YACC" || YACC="yacc"
 
+if test "$YACC" = "" -o "$YACC" = ":"; then
+	if test ! -f util/configparser.c; then
+		as_fn_error $? "no yacc and no util/configparser.c: need flex and bison to compile from source repository." "$LINENO" 5
+	fi
+fi
 # Extract the first word of "doxygen", so it can be a program name with args.
 set dummy doxygen; ac_word=$2
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
@@ -14877,6 +14888,21 @@ fi
 done
 
 
+# Check for Linux timestamping headers
+for ac_header in linux/net_tstamp.h
+do :
+  ac_fn_c_check_header_compile "$LINENO" "linux/net_tstamp.h" "ac_cv_header_linux_net_tstamp_h" "$ac_includes_default
+"
+if test "x$ac_cv_header_linux_net_tstamp_h" = xyes; then :
+  cat >>confdefs.h <<_ACEOF
+#define HAVE_LINUX_NET_TSTAMP_H 1
+_ACEOF
+
+fi
+
+done
+
+
 # check for types.
 # Using own tests for int64* because autoconf builtin only give 32bit.
 ac_fn_c_check_type "$LINENO" "int8_t" "ac_cv_type_int8_t" "$ac_includes_default"
@@ -15954,12 +15980,12 @@ else
 
 echo '
 #include <stdio.h>
-int test() {
+int test(void) {
         int a = fseeko(stdin, 0, 0);
         return a;
 }
 ' > conftest.c
-echo 'void f(){}' >>conftest.c
+echo 'void f(void){}' >>conftest.c
 if test -z "`$CC $CPPFLAGS $CFLAGS $ERRFLAG -c conftest.c 2>&1`"; then
 eval "cv_prog_cc_flag_needed_$cache=no"
 else
@@ -17541,39 +17567,68 @@ fi
 		PYTHON_VERSION=`$PYTHON -c "import sys; \
 			print(sys.version.split()[0])"`
 	fi
+	# calculate the version number components.
+
+	v="$PYTHON_VERSION"
+	PYTHON_VERSION_MAJOR=`echo $v | sed 's/[^0-9].*//'`
+	if test -z "$PYTHON_VERSION_MAJOR"; then PYTHON_VERSION_MAJOR="0"; fi
+	v=`echo $v | sed -e 's/^[0-9]*$//' -e 's/[0-9]*[^0-9]//'`
+	PYTHON_VERSION_MINOR=`echo $v | sed 's/[^0-9].*//'`
+	if test -z "$PYTHON_VERSION_MINOR"; then PYTHON_VERSION_MINOR="0"; fi
+	v=`echo $v | sed -e 's/^[0-9]*$//' -e 's/[0-9]*[^0-9]//'`
+	PYTHON_VERSION_PATCH=`echo $v | sed 's/[^0-9].*//'`
+	if test -z "$PYTHON_VERSION_PATCH"; then PYTHON_VERSION_PATCH="0"; fi
+
+
+	# For some systems, sysconfig exists, but has the wrong paths,
+	# on Debian 10, for python 2.7 and 3.7. So, we check the version,
+	# and for older versions try distutils.sysconfig first. For newer
+	# versions>=3.10, where distutils.sysconfig is deprecated, use
+	# sysconfig first and then attempt the other one.
+	py_distutils_first="no"
+	if test $PYTHON_VERSION_MAJOR -lt 3; then
+		py_distutils_first="yes"
+	fi
+	if test $PYTHON_VERSION_MAJOR -eq 3 -a $PYTHON_VERSION_MINOR -lt 10; then
+		py_distutils_first="yes"
+	fi
 
-	# Check if you have sysconfig
-	{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for the sysconfig Python module" >&5
-$as_echo_n "checking for the sysconfig Python module... " >&6; }
-        if ac_sysconfig_result=`$PYTHON -c "import sysconfig" 2>&1`; then
+	# Check if you have the first module
+	if test "$py_distutils_first" = "yes"; then m="distutils"; else m="sysconfig"; fi
+	sysconfig_module=""
+	{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for the $m Python module" >&5
+$as_echo_n "checking for the $m Python module... " >&6; }
+        if ac_modulecheck_result1=`$PYTHON -c "import $m" 2>&1`; then
                 { $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
 $as_echo "yes" >&6; }
-		sysconfig_module="sysconfig"
-		# if yes, use sysconfig, because distutils is deprecated.
+		sysconfig_module="$m"
 	else
                 { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
 $as_echo "no" >&6; }
-		# if no, try to use distutils
-
-		#
-		# Check if you have distutils, else fail
-		#
-		{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for the distutils Python package" >&5
-$as_echo_n "checking for the distutils Python package... " >&6; }
-		if ac_distutils_result=`$PYTHON -c "import distutils" 2>&1`; then
+	fi
+
+	# if not found, try the other one.
+	if test -z "$sysconfig_module"; then
+		if test "$py_distutils_first" = "yes"; then m2="sysconfig"; else m2="distutils"; fi
+		{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for the $m2 Python module" >&5
+$as_echo_n "checking for the $m2 Python module... " >&6; }
+		if ac_modulecheck_result2=`$PYTHON -c "import $m2" 2>&1`; then
 			{ $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
 $as_echo "yes" >&6; }
+			sysconfig_module="$m2"
 		else
 			{ $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
 $as_echo "no" >&6; }
-			as_fn_error $? "cannot import Python module \"distutils\".
-	Please check your Python installation. The error was:
-	$ac_distutils_result" "$LINENO" 5
+			as_fn_error $? "cannot import Python module \"$m\", or \"$m2\".
+	Please check your Python installation. The errors are:
+	$m
+	$ac_modulecheck_result1
+	$m2
+	$ac_modulecheck_result2" "$LINENO" 5
 			PYTHON_VERSION=""
 		fi
-
-		sysconfig_module="distutils.sysconfig"
 	fi
+	if test "$sysconfig_module" = "distutils"; then sysconfig_module="distutils.sysconfig"; fi
 
         #
         # Check for Python include path
@@ -17705,7 +17760,14 @@ ac_compiler_gnu=$ac_cv_c_compiler_gnu
         #
 
    if test ! -z "$PYTHON_VERSION"; then
-	if test `$PYTHON -c "print('$PYTHON_VERSION' >= '2.4.0')"` = "False"; then
+	badversion="no"
+	if test "$PYTHON_VERSION_MAJOR" -lt 2; then
+		badversion="yes"
+	fi
+	if test "$PYTHON_VERSION_MAJOR" -eq 2 -a "$PYTHON_VERSION_MINOR" -lt 4; then
+		badversion="yes"
+	fi
+	if test "$badversion" = "yes"; then
 		as_fn_error $? "Python version >= 2.4.0 is required" "$LINENO" 5
 	fi
 
@@ -20174,7 +20236,7 @@ char* (*f) () = getaddrinfo;
 #ifdef __cplusplus
 }
 #endif
-int main() {
+int main(void) {
         ;
         return 0;
 }
@@ -20448,7 +20510,7 @@ echo '
 #include <stdlib.h>
 #include <unistd.h>
 ' >conftest.c
-echo 'void f(){ (void)daemon(0, 0); }' >>conftest.c
+echo 'void f(void){ (void)daemon(0, 0); }' >>conftest.c
 if test -z "`$CC $CPPFLAGS $CFLAGS -c conftest.c 2>&1 | grep -e deprecated -e unavailable`"; then
 eval "cv_cc_deprecated_$cache=no"
 else
@@ -22086,7 +22148,7 @@ _ACEOF
 
 
 
-version=1.17.1
+version=1.18.0
 
 date=`date +'%b %e, %Y'`
 
@@ -22605,7 +22667,7 @@ cat >>$CONFIG_STATUS <<\_ACEOF || ac_write_fail=1
 # report actual input values of CONFIG_FILES etc. instead of their
 # values after options handling.
 ac_log="
-This file was extended by unbound $as_me 1.17.1, which was
+This file was extended by unbound $as_me 1.18.0, which was
 generated by GNU Autoconf 2.69.  Invocation command line was
 
   CONFIG_FILES    = $CONFIG_FILES
@@ -22671,7 +22733,7 @@ _ACEOF
 cat >>$CONFIG_STATUS <<_ACEOF || ac_write_fail=1
 ac_cs_config="`$as_echo "$ac_configure_args" | sed 's/^ //; s/[\\""\`\$]/\\\\&/g'`"
 ac_cs_version="\\
-unbound config.status 1.17.1
+unbound config.status 1.18.0
 configured by $0, generated by GNU Autoconf 2.69,
   with options \\"\$ac_cs_config\\"
 
diff --git a/contrib/unbound/configure.ac b/contrib/unbound/configure.ac
index 2c7583310f20..098988f55f8a 100644
--- a/contrib/unbound/configure.ac
+++ b/contrib/unbound/configure.ac
@@ -10,15 +10,15 @@ sinclude(dnscrypt/dnscrypt.m4)
 
 # must be numbers. ac_defun because of later processing
 m4_define([VERSION_MAJOR],[1])
-m4_define([VERSION_MINOR],[17])
-m4_define([VERSION_MICRO],[1])
+m4_define([VERSION_MINOR],[18])
+m4_define([VERSION_MICRO],[0])
 AC_INIT([unbound],m4_defn([VERSION_MAJOR]).m4_defn([VERSION_MINOR]).m4_defn([VERSION_MICRO]),[unbound-bugs@nlnetlabs.nl or https://github.com/NLnetLabs/unbound/issues],[unbound])
 AC_SUBST(UNBOUND_VERSION_MAJOR, [VERSION_MAJOR])
 AC_SUBST(UNBOUND_VERSION_MINOR, [VERSION_MINOR])
 AC_SUBST(UNBOUND_VERSION_MICRO, [VERSION_MICRO])
 
 LIBUNBOUND_CURRENT=9
-LIBUNBOUND_REVISION=21
+LIBUNBOUND_REVISION=22
 LIBUNBOUND_AGE=1
 # 1.0.0 had 0:12:0
 # 1.0.1 had 0:13:0
@@ -107,6 +107,7 @@ LIBUNBOUND_AGE=1
 # 1.16.3 had 9:19:1
 # 1.17.0 had 9:20:1
 # 1.17.1 had 9:21:1
+# 1.18.0 had 9:22:1
 
 #   Current  -- the number of the binary API that we're implementing
 #   Revision -- which iteration of the implementation of the binary
@@ -156,7 +157,7 @@ esac
 
 # are we on MinGW?
 if uname -s 2>&1 | grep MINGW >/dev/null; then on_mingw="yes"
-else 
+else
 	if echo $host | grep mingw >/dev/null; then on_mingw="yes"
 	else on_mingw="no"; fi
 fi
@@ -185,9 +186,9 @@ ub_conf_dir=`AS_DIRNAME(["$ub_conf_file"])`
 AC_SUBST(ub_conf_dir)
 
 # Determine run, chroot directory and pidfile locations
-AC_ARG_WITH(run-dir, 
-    AS_HELP_STRING([--with-run-dir=path],[set default directory to chdir to (by default dir part of cfg file)]), 
-    UNBOUND_RUN_DIR="$withval", 
+AC_ARG_WITH(run-dir,
+    AS_HELP_STRING([--with-run-dir=path],[set default directory to chdir to (by default dir part of cfg file)]),
+    UNBOUND_RUN_DIR="$withval",
 if test $on_mingw = no; then
     UNBOUND_RUN_DIR=`dirname "$ub_conf_file"`
 else
@@ -198,9 +199,9 @@ AC_SUBST(UNBOUND_RUN_DIR)
 ACX_ESCAPE_BACKSLASH($UNBOUND_RUN_DIR, hdr_run)
 AC_DEFINE_UNQUOTED(RUN_DIR, ["$hdr_run"], [Directory to chdir to])
 
-AC_ARG_WITH(chroot-dir, 
-    AS_HELP_STRING([--with-chroot-dir=path],[set default directory to chroot to (by default same as run-dir)]), 
-    UNBOUND_CHROOT_DIR="$withval", 
+AC_ARG_WITH(chroot-dir,
+    AS_HELP_STRING([--with-chroot-dir=path],[set default directory to chroot to (by default same as run-dir)]),
+    UNBOUND_CHROOT_DIR="$withval",
 if test $on_mingw = no; then
     UNBOUND_CHROOT_DIR="$UNBOUND_RUN_DIR"
 else
@@ -218,9 +219,9 @@ AC_ARG_WITH(share-dir,
 AC_SUBST(UNBOUND_SHARE_DIR)
 AC_DEFINE_UNQUOTED(SHARE_DIR, ["$UNBOUND_SHARE_DIR"], [Shared data])
 
-AC_ARG_WITH(pidfile, 
-    AS_HELP_STRING([--with-pidfile=filename],[set default pathname to unbound pidfile (default run-dir/unbound.pid)]), 
-    UNBOUND_PIDFILE="$withval", 
+AC_ARG_WITH(pidfile,
+    AS_HELP_STRING([--with-pidfile=filename],[set default pathname to unbound pidfile (default run-dir/unbound.pid)]),
+    UNBOUND_PIDFILE="$withval",
 if test $on_mingw = no; then
     UNBOUND_PIDFILE="$UNBOUND_RUN_DIR/unbound.pid"
 else
@@ -231,9 +232,9 @@ AC_SUBST(UNBOUND_PIDFILE)
 ACX_ESCAPE_BACKSLASH($UNBOUND_PIDFILE, hdr_pid)
 AC_DEFINE_UNQUOTED(PIDFILE, ["$hdr_pid"], [default pidfile location])
 
-AC_ARG_WITH(rootkey-file, 
-    AS_HELP_STRING([--with-rootkey-file=filename],[set default pathname to root key file (default run-dir/root.key). This file is read and written.]), 
-    UNBOUND_ROOTKEY_FILE="$withval", 
+AC_ARG_WITH(rootkey-file,
+    AS_HELP_STRING([--with-rootkey-file=filename],[set default pathname to root key file (default run-dir/root.key). This file is read and written.]),
+    UNBOUND_ROOTKEY_FILE="$withval",
 if test $on_mingw = no; then
     UNBOUND_ROOTKEY_FILE="$UNBOUND_RUN_DIR/root.key"
 else
@@ -244,9 +245,9 @@ AC_SUBST(UNBOUND_ROOTKEY_FILE)
 ACX_ESCAPE_BACKSLASH($UNBOUND_ROOTKEY_FILE, hdr_rkey)
 AC_DEFINE_UNQUOTED(ROOT_ANCHOR_FILE, ["$hdr_rkey"], [default rootkey location])
 
-AC_ARG_WITH(rootcert-file, 
-    AS_HELP_STRING([--with-rootcert-file=filename],[set default pathname to root update certificate file (default run-dir/icannbundle.pem).  This file need not exist if you are content with the builtin.]), 
-    UNBOUND_ROOTCERT_FILE="$withval", 
+AC_ARG_WITH(rootcert-file,
+    AS_HELP_STRING([--with-rootcert-file=filename],[set default pathname to root update certificate file (default run-dir/icannbundle.pem).  This file need not exist if you are content with the builtin.]),
+    UNBOUND_ROOTCERT_FILE="$withval",
 if test $on_mingw = no; then
     UNBOUND_ROOTCERT_FILE="$UNBOUND_RUN_DIR/icannbundle.pem"
 else
@@ -257,9 +258,9 @@ AC_SUBST(UNBOUND_ROOTCERT_FILE)
 ACX_ESCAPE_BACKSLASH($UNBOUND_ROOTCERT_FILE, hdr_rpem)
 AC_DEFINE_UNQUOTED(ROOT_CERT_FILE, ["$hdr_rpem"], [default rootcert location])
 
-AC_ARG_WITH(username, 
-    AS_HELP_STRING([--with-username=user],[set default user that unbound changes to (default user is unbound)]), 
-    UNBOUND_USERNAME="$withval", 
+AC_ARG_WITH(username,
+    AS_HELP_STRING([--with-username=user],[set default user that unbound changes to (default user is unbound)]),
+    UNBOUND_USERNAME="$withval",
     UNBOUND_USERNAME="unbound")
 AC_SUBST(UNBOUND_USERNAME)
 AC_DEFINE_UNQUOTED(UB_USERNAME, ["$UNBOUND_USERNAME"], [default username])
@@ -285,7 +286,7 @@ ACX_DETERMINE_EXT_FLAGS_UNBOUND
 # debug mode flags warnings
 AC_ARG_ENABLE(checking, AS_HELP_STRING([--enable-checking],[Enable warnings, asserts, makefile-dependencies]))
 AC_ARG_ENABLE(debug, AS_HELP_STRING([--enable-debug],[same as enable-checking]))
-if test "$enable_debug" = "yes"; then debug_enabled="$enable_debug"; 
+if test "$enable_debug" = "yes"; then debug_enabled="$enable_debug";
 else debug_enabled="$enable_checking"; fi
 AC_SUBST(debug_enabled)
 case "$debug_enabled" in
@@ -388,7 +389,17 @@ fi
 if test "$LEX" != "" -a "$LEX" != ":"; then
 ACX_YYLEX_OPTION
 fi
+if test "$LEX" = "" -o "$LEX" = ":"; then
+	if test ! -f util/configlexer.c; then
+		AC_MSG_ERROR([no lex and no util/configlexer.c: need flex and bison to compile from source repository.])
+	fi
+fi
 AC_PROG_YACC
+if test "$YACC" = "" -o "$YACC" = ":"; then
+	if test ! -f util/configparser.c; then
+		AC_MSG_ERROR([no yacc and no util/configparser.c: need flex and bison to compile from source repository.])
+	fi
+fi
 AC_CHECK_PROG(doxygen, doxygen, doxygen)
 AC_CHECK_TOOL(STRIP, strip)
 ACX_LIBTOOL_C_ONLY
@@ -453,6 +464,9 @@ AC_CHECK_HEADERS([netioapi.h],,, [AC_INCLUDES_DEFAULT
 #endif
 ])
 
+# Check for Linux timestamping headers
+AC_CHECK_HEADERS([linux/net_tstamp.h],,, [AC_INCLUDES_DEFAULT])
+
 # check for types.  
 # Using own tests for int64* because autoconf builtin only give 32bit.
 AC_CHECK_TYPE(int8_t, signed char)
@@ -548,11 +562,11 @@ sinclude(systemd.m4)
 # Include systemd.m4 - end
 
 # set memory allocation checking if requested
-AC_ARG_ENABLE(alloc-checks, AS_HELP_STRING([--enable-alloc-checks],[ enable to memory allocation statistics, for debug purposes ]), 
+AC_ARG_ENABLE(alloc-checks, AS_HELP_STRING([--enable-alloc-checks],[ enable to memory allocation statistics, for debug purposes ]),
 	, )
-AC_ARG_ENABLE(alloc-lite, AS_HELP_STRING([--enable-alloc-lite],[ enable for lightweight alloc assertions, for debug purposes ]), 
+AC_ARG_ENABLE(alloc-lite, AS_HELP_STRING([--enable-alloc-lite],[ enable for lightweight alloc assertions, for debug purposes ]),
 	, )
-AC_ARG_ENABLE(alloc-nonregional, AS_HELP_STRING([--enable-alloc-nonregional],[ enable nonregional allocs, slow but exposes regional allocations to other memory purifiers, for debug purposes ]), 
+AC_ARG_ENABLE(alloc-nonregional, AS_HELP_STRING([--enable-alloc-nonregional],[ enable nonregional allocs, slow but exposes regional allocations to other memory purifiers, for debug purposes ]),
 	, )
 if test x_$enable_alloc_nonregional = x_yes; then
 	AC_DEFINE(UNBOUND_ALLOC_NONREGIONAL, 1, [use malloc not regions, for debug use])
@@ -585,7 +599,7 @@ if test "$on_mingw" = "yes"; then
 ])],
 	AC_MSG_RESULT(yes)
 	AC_DEFINE(HAVE_WINDOWS_THREADS, 1, [Using Windows threads])
-,	
+,
 	AC_MSG_RESULT(no)
 )
 
@@ -596,7 +610,7 @@ else
 # check this first, so that the pthread lib does not get linked in via
 # libssl or libpython, and thus distorts the tests, and we end up using
 # the non-threadsafe C libraries.
-AC_ARG_WITH(pthreads, AS_HELP_STRING([--with-pthreads],[use pthreads library, or --without-pthreads to disable threading support.]), 
+AC_ARG_WITH(pthreads, AS_HELP_STRING([--with-pthreads],[use pthreads library, or --without-pthreads to disable threading support.]),
  [ ],[ withval="yes" ])
 ub_have_pthreads=no
 if test x_$withval != x_no; then
@@ -623,7 +637,7 @@ int main(void) {return 0;}
 		# first compile
 		echo "$CC $CFLAGS -c conftest.c -o conftest.o" >&AS_MESSAGE_LOG_FD
 		$CC $CFLAGS -c conftest.c -o conftest.o 2>&AS_MESSAGE_LOG_FD >&AS_MESSAGE_LOG_FD
-		if test $? = 0; then 
+		if test $? = 0; then
 			# then link
 			echo "$CC $CFLAGS -Werror $LDFLAGS $LIBS -o conftest contest.o" >&AS_MESSAGE_LOG_FD
 			$CC $CFLAGS -Werror $LDFLAGS $LIBS -o conftest conftest.o 2>&AS_MESSAGE_LOG_FD >&AS_MESSAGE_LOG_FD
@@ -644,7 +658,7 @@ int main(void) {return 0;}
 		])
 fi
 
-# check solaris thread library 
+# check solaris thread library
 AC_ARG_WITH(solaris-threads, AS_HELP_STRING([--with-solaris-threads],[use solaris native thread library.]), [ ],[ withval="no" ])
 ub_have_sol_threads=no
 if test x_$withval != x_no; then
@@ -658,8 +672,8 @@ if test x_$withval != x_no; then
 		ACX_CHECK_COMPILER_FLAG(mt, [CFLAGS="$CFLAGS -mt"],
 			[CFLAGS="$CFLAGS -D_REENTRANT"])
 		ub_have_sol_threads=yes
-	] , [ 
-		AC_MSG_ERROR([no solaris threads found.]) 
+	] , [
+		AC_MSG_ERROR([no solaris threads found.])
 	])
 	fi
 fi
@@ -734,7 +748,14 @@ if test x_$ub_test_python != x_no; then
    ac_save_LIBS="$LIBS" dnl otherwise AC_PYTHON_DEVEL thrashes $LIBS
    AC_PYTHON_DEVEL
    if test ! -z "$PYTHON_VERSION"; then
-	if test `$PYTHON -c "print('$PYTHON_VERSION' >= '2.4.0')"` = "False"; then
+	badversion="no"
+	if test "$PYTHON_VERSION_MAJOR" -lt 2; then
+		badversion="yes"
+	fi
+	if test "$PYTHON_VERSION_MAJOR" -eq 2 -a "$PYTHON_VERSION_MINOR" -lt 4; then
+		badversion="yes"
+	fi
+	if test "$badversion" = "yes"; then
 		AC_MSG_ERROR([Python version >= 2.4.0 is required])
 	fi
 
@@ -1085,7 +1106,7 @@ int load_gost_id(void)
 	EVP_PKEY_asn1_get0_info(&gost_id, NULL, NULL, NULL, NULL, meth);
 	return gost_id;
 }
-int main(void) { 
+int main(void) {
 	EVP_MD_CTX* ctx;
 	const EVP_MD* md;
 	unsigned char digest[64]; /* its a 256-bit digest, so uses 32 bytes */
@@ -1529,7 +1550,7 @@ if test x_$enable_fully_static = x_yes; then
 fi
 
 # set lock checking if requested
-AC_ARG_ENABLE(lock_checks, AS_HELP_STRING([--enable-lock-checks],[ enable to check lock and unlock calls, for debug purposes ]), 
+AC_ARG_ENABLE(lock_checks, AS_HELP_STRING([--enable-lock-checks],[ enable to check lock and unlock calls, for debug purposes ]),
 	, )
 if test x_$enable_lock_checks = x_yes; then
 	AC_DEFINE(ENABLE_LOCK_CHECKS, 1, [Define if you want to use debug lock checking (slow).])
@@ -1980,11 +2001,11 @@ AC_ARG_WITH(libunbound-only, AS_HELP_STRING([--with-libunbound-only],[do not bui
 	fi
 ])
 if test $ALLTARGET = "alltargets"; then
-	if test $USE_NSS = "yes"; then 
-		AC_MSG_ERROR([--with-nss can only be used in combination with --with-libunbound-only.])	
+	if test $USE_NSS = "yes"; then
+		AC_MSG_ERROR([--with-nss can only be used in combination with --with-libunbound-only.])
 	fi
 	if test $USE_NETTLE = "yes"; then
-		AC_MSG_ERROR([--with-nettle can only be used in combination with --with-libunbound-only.])	
+		AC_MSG_ERROR([--with-nettle can only be used in combination with --with-libunbound-only.])
 	fi
 fi
 
@@ -1995,7 +2016,7 @@ ACX_STRIP_EXT_FLAGS
 if test -n "$LATE_LDFLAGS"; then
   LDFLAGS="$LATE_LDFLAGS $LDFLAGS"
 fi
-# remove start spaces 
+# remove start spaces
 LDFLAGS=`echo "$LDFLAGS"|sed -e 's/^ *//'`
 LIBS=`echo "$LIBS"|sed -e 's/^ *//'`
 
diff --git a/contrib/unbound/contrib/Dockerfile.tests b/contrib/unbound/contrib/Dockerfile.tests
index 417daccb21f9..4d13210216b2 100644
--- a/contrib/unbound/contrib/Dockerfile.tests
+++ b/contrib/unbound/contrib/Dockerfile.tests
@@ -1,10 +1,8 @@
 FROM gcc:latest
 WORKDIR /usr/src/unbound
-RUN apt-get update
 # install semantic parser & lexical analyzer
-RUN apt-get install -y bison flex
 # install packages used in tests
-RUN apt-get install -y ldnsutils dnsutils xxd splint doxygen netcat
+RUN apt-get update && apt-get install -y bison flex ldnsutils dnsutils xxd splint doxygen netcat-openbsd
 # accept short rsa keys, which are used in tests
 RUN sed -i 's/SECLEVEL=2/SECLEVEL=1/g' /usr/lib/ssl/openssl.cnf
 
diff --git a/contrib/unbound/contrib/README b/contrib/unbound/contrib/README
index ef2a0ab885dd..2427a02947fd 100644
--- a/contrib/unbound/contrib/README
+++ b/contrib/unbound/contrib/README
@@ -55,3 +55,6 @@ distribution but may be helpful.
   contributed by Andreas Schulze.
 * metrics.awk: awk script that can convert unbound-control stats to
   Prometheus metrics format output.
+* unbound.init_yocto: An init script to start and stop the server. Put it
+  in /etc/init.d/unbound to use it. It is for the Yocto Project, in
+  embedded systems, contributed by beni-sandu.
diff --git a/contrib/unbound/contrib/aaaa-filter-iterator.patch b/contrib/unbound/contrib/aaaa-filter-iterator.patch
index 5513133722db..cb6dabc44856 100644
--- a/contrib/unbound/contrib/aaaa-filter-iterator.patch
+++ b/contrib/unbound/contrib/aaaa-filter-iterator.patch
@@ -105,9 +105,9 @@ index 2482a1f4..bd5ba243 100644
 --- a/iterator/iter_utils.c
 +++ b/iterator/iter_utils.c
 @@ -177,6 +177,7 @@ iter_apply_cfg(struct iter_env* iter_env, struct config_file* cfg)
- 	iter_env->supports_ipv6 = cfg->do_ip6;
- 	iter_env->supports_ipv4 = cfg->do_ip4;
  	iter_env->outbound_msg_retry = cfg->outbound_msg_retry;
+ 	iter_env->max_sent_count = cfg->max_sent_count;
+ 	iter_env->max_query_restarts = cfg->max_query_restarts;
 +	iter_env->aaaa_filter = cfg->aaaa_filter;
  	return 1;
  }
diff --git a/contrib/unbound/contrib/unbound.init_yocto b/contrib/unbound/contrib/unbound.init_yocto
new file mode 100644
index 000000000000..4eba752bc55c
--- /dev/null
+++ b/contrib/unbound/contrib/unbound.init_yocto
@@ -0,0 +1,139 @@
+#!/bin/sh
+#
+# unbound	This shell script takes care of starting and stopping
+#		unbound (DNS server).
+#
+# chkconfig:   - 14 86
+# description:	unbound is a Domain Name Server (DNS) \
+#		that is used to resolve host names to IP addresses.
+
+### BEGIN INIT INFO
+# Provides: $named unbound
+# Required-Start: $network $local_fs
+# Required-Stop: $network $local_fs
+# Should-Start: $syslog
+# Should-Stop: $syslog
+# Short-Description: unbound recursive Domain Name Server.
+# Description:  unbound is a Domain Name Server (DNS) 
+#		that is used to resolve host names to IP addresses.
+### END INIT INFO
+
+# Source function library.
+. /etc/init.d/functions
+
+exec="/usr/sbin/unbound"
+prog="unbound"
+config="/etc/unbound/unbound.conf"
+pidfile="/var/unbound/unbound.pid"
+rootdir="/var/unbound"
+
+[ -e /etc/sysconfig/$prog ] && . /etc/sysconfig/$prog
+
+lockfile=/var/lock/subsys/$prog
+
+start() {
+    [ -x $exec ] || exit 5
+    [ -f $config ] || exit 6
+    echo -n $"Starting $prog: "
+
+    # setup root jail
+    if [ -s /etc/localtime ]; then 
+	[ -d ${rootdir}/etc ] || mkdir -p ${rootdir}/etc ;
+	if [ ! -e ${rootdir}/etc/localtime ] || ! /usr/bin/cmp -s /etc/localtime ${rootdir}/etc/localtime; then
+	    cp -fp /etc/localtime ${rootdir}/etc/localtime
+	fi;
+    fi;
+    if [ -s /etc/resolv.conf ]; then
+	[ -d ${rootdir}/etc ] || mkdir -p ${rootdir}/etc ;
+	if [ ! -e ${rootdir}/etc/resolv.conf ] || ! /usr/bin/cmp -s /etc/resolv.conf ${rootdir}/etc/resolv.conf; then
+	    cp -fp /etc/resolv.conf ${rootdir}/etc/resolv.conf
+	fi;
+    fi;
+    if ! egrep -q '^/[^[:space:]]+[[:space:]]+'${rootdir}'/dev/log' /proc/mounts; then
+	[ -d ${rootdir}/dev ] || mkdir -p ${rootdir}/dev ;
+	[ -e ${rootdir}/dev/log ] || touch ${rootdir}/dev/log
+	mount --bind -n /dev/log ${rootdir}/dev/log >/dev/null 2>&1;
+    fi;
+    if ! egrep -q '^/[^[:space:]]+[[:space:]]+'${rootdir}'/dev/random' /proc/mounts; then
+	[ -d ${rootdir}/dev ] || mkdir -p ${rootdir}/dev ;
+	[ -e ${rootdir}/dev/random ] || touch ${rootdir}/dev/random
+	mount --bind -n /dev/random ${rootdir}/dev/random >/dev/null 2>&1;
+    fi;
+
+    # if not running, start it up here
+    daemonize $exec
+    retval=$?
+    echo
+    [ $retval -eq 0 ] && touch $lockfile
+    return $retval
+}
+
+stop() {
+    echo -n $"Stopping $prog: "
+    # stop it here, often "killproc $prog"
+    killproc $prog
+    retval=$?
+    echo
+    [ $retval -eq 0 ] && rm -f $lockfile
+    if egrep -q '^/[^[:space:]]+[[:space:]]+'${rootdir}'/dev/log' /proc/mounts; then
+	umount ${rootdir}/dev/log >/dev/null 2>&1
+    fi;
+    if egrep -q '^/[^[:space:]]+[[:space:]]+'${rootdir}'/dev/random' /proc/mounts; then
+	umount ${rootdir}/dev/random >/dev/null 2>&1
+    fi;
+    return $retval
+}
+
+restart() {
+    stop
+    start
+}
+
+reload() {
+    kill -HUP `cat $pidfile`
+}
+
+force_reload() {
+    restart
+}
+
+rh_status() {
+    # run checks to determine if the service is running or use generic status
+    status $prog
+}
+
+rh_status_q() {
+    rh_status -p $pidfile >/dev/null 2>&1
+}
+
+case "$1" in
+    start)
+        rh_status_q && exit 0
+        $1
+        ;;
+    stop)
+        rh_status_q || exit 0
+        $1
+        ;;
+    restart)
+        $1
+        ;;
+    reload)
+        rh_status_q || exit 7
+        $1
+        ;;
+    force-reload)
+        force_reload
+        ;;
+    status)
+        rh_status
+        ;;
+    condrestart|try-restart)
+        rh_status_q || exit 0
+        restart
+        ;;
+    *)
+        echo $"Usage: $0 {start|stop|status|restart|condrestart|try-restart|reload|force-reload}"
+        exit 2
+esac
+exit $?
diff --git a/contrib/unbound/daemon/acl_list.c b/contrib/unbound/daemon/acl_list.c
index f3961dbbb7ad..83cfd7ddf939 100644
--- a/contrib/unbound/daemon/acl_list.c
+++ b/contrib/unbound/daemon/acl_list.c
@@ -109,6 +109,8 @@ parse_acl_access(const char* str, enum acl_access* control)
 		*control = acl_allow_snoop;
 	else if(strcmp(str, "allow_setrd") == 0)
 		*control = acl_allow_setrd;
+	else if (strcmp(str, "allow_cookie") == 0)
+		*control = acl_allow_cookie;
 	else {
 		log_err("access control type %s unknown", str);
 		return 0;
diff --git a/contrib/unbound/daemon/acl_list.h b/contrib/unbound/daemon/acl_list.h
index c717179baf5e..9da43bef37e5 100644
--- a/contrib/unbound/daemon/acl_list.h
+++ b/contrib/unbound/daemon/acl_list.h
@@ -64,8 +64,12 @@ enum acl_access {
 	acl_allow,
 	/** allow full access for all queries, recursion and cache snooping */
 	acl_allow_snoop,
-	/** allow full access for recursion queries and set RD flag regardless of request */
-	acl_allow_setrd
+	/** allow full access for recursion queries and set RD flag regardless
+	 *  of request */
+	acl_allow_setrd,
+	/** allow full access for recursion (+RD) queries if valid cookie
+	 *  present or stateful transport */
+	acl_allow_cookie
 };
 
 /**
diff --git a/contrib/unbound/daemon/cachedump.c b/contrib/unbound/daemon/cachedump.c
index 943eb63f326c..61ee1d29133f 100644
--- a/contrib/unbound/daemon/cachedump.c
+++ b/contrib/unbound/daemon/cachedump.c
@@ -166,8 +166,7 @@ dump_msg_ref(RES* ssl, struct ub_packed_rrset_key* k)
 
 /** dump message entry */
 static int
-dump_msg(RES* ssl, struct query_info* k, struct reply_info* d, 
-	time_t now)
+dump_msg(RES* ssl, struct query_info* k, struct reply_info* d, time_t now)
 {
 	size_t i;
 	char* nm, *tp, *cl;
@@ -192,13 +191,15 @@ dump_msg(RES* ssl, struct query_info* k, struct reply_info* d,
 	}
 	
 	/* meta line */
-	if(!ssl_printf(ssl, "msg %s %s %s %d %d " ARG_LL "d %d %u %u %u\n",
+	if(!ssl_printf(ssl, "msg %s %s %s %d %d " ARG_LL "d %d %u %u %u %d %s\n",
 			nm, cl, tp,
 			(int)d->flags, (int)d->qdcount, 
 			(long long)(d->ttl-now), (int)d->security,
-			(unsigned)d->an_numrrsets, 
+			(unsigned)d->an_numrrsets,
 			(unsigned)d->ns_numrrsets,
-			(unsigned)d->ar_numrrsets)) {
+			(unsigned)d->ar_numrrsets,
+			(int)d->reason_bogus,
+			d->reason_bogus_str?d->reason_bogus_str:"")) {
 		free(nm);
 		free(tp);
 		free(cl);
@@ -633,6 +634,9 @@ load_msg(RES* ssl, sldns_buffer* buf, struct worker* worker)
 	long long ttl;
 	size_t i;
 	int go_on = 1;
+	int ede;
+	int consumed = 0;
+	char* ede_str = NULL;
 
 	regional_free_all(region);
 
@@ -647,11 +651,16 @@ load_msg(RES* ssl, sldns_buffer* buf, struct worker* worker)
 	}
 
 	/* read remainder of line */
-	if(sscanf(s, " %u %u " ARG_LL "d %u %u %u %u", &flags, &qdcount, &ttl, 
-		&security, &an, &ns, &ar) != 7) {
+	/* note the last space before any possible EDE text */
+	if(sscanf(s, " %u %u " ARG_LL "d %u %u %u %u %d %n", &flags, &qdcount, &ttl,
+		&security, &an, &ns, &ar, &ede, &consumed) != 8) {
 		log_warn("error cannot parse numbers: %s", s);
 		return 0;
 	}
+	/* there may be EDE text after the numbers */
+	if(consumed > 0 && (size_t)consumed < strlen(s))
+		ede_str = s + consumed;
+	memset(&rep, 0, sizeof(rep));
 	rep.flags = (uint16_t)flags;
 	rep.qdcount = (uint16_t)qdcount;
 	rep.ttl = (time_t)ttl;
@@ -666,6 +675,8 @@ load_msg(RES* ssl, sldns_buffer* buf, struct worker* worker)
 	rep.ns_numrrsets = (size_t)ns;
 	rep.ar_numrrsets = (size_t)ar;
 	rep.rrset_count = (size_t)an+(size_t)ns+(size_t)ar;
+	rep.reason_bogus = (sldns_ede_code)ede;
+	rep.reason_bogus_str = ede_str?(char*)regional_strdup(region, ede_str):NULL;
 	rep.rrsets = (struct ub_packed_rrset_key**)regional_alloc_zero(
 		region, sizeof(struct ub_packed_rrset_key*)*rep.rrset_count);
 
@@ -860,7 +871,8 @@ int print_deleg_lookup(RES* ssl, struct worker* worker, uint8_t* nm,
 		/* go up? */
 		if(iter_dp_is_useless(&qinfo, BIT_RD, dp,
 			(worker->env.cfg->do_ip4 && worker->back->num_ip4 != 0),
-			(worker->env.cfg->do_ip6 && worker->back->num_ip6 != 0))) {
+			(worker->env.cfg->do_ip6 && worker->back->num_ip6 != 0),
+			worker->env.cfg->do_nat64)) {
 			print_dp_main(ssl, dp, msg);
 			print_dp_details(ssl, worker, dp);
 			if(!ssl_printf(ssl, "cache delegation was "
diff --git a/contrib/unbound/daemon/remote.c b/contrib/unbound/daemon/remote.c
index 7c5a036f343d..4990fc8e9195 100644
--- a/contrib/unbound/daemon/remote.c
+++ b/contrib/unbound/daemon/remote.c
@@ -4,22 +4,22 @@
  * Copyright (c) 2008, NLnet Labs. All rights reserved.
  *
  * This software is open source.
- * 
+ *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
- * 
+ *
  * Redistributions of source code must retain the above copyright notice,
  * this list of conditions and the following disclaimer.
- * 
+ *
  * Redistributions in binary form must reproduce the above copyright notice,
  * this list of conditions and the following disclaimer in the documentation
  * and/or other materials provided with the distribution.
- * 
+ *
  * Neither the name of the NLNET LABS nor the names of its contributors may
  * be used to endorse or promote products derived from this software without
  * specific prior written permission.
- * 
+ *
  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
@@ -38,7 +38,7 @@
  *
  * This file contains the remote control functionality for the daemon.
  * The remote control can be performed using either the commandline
- * unbound-control tool, or a TLS capable web browser. 
+ * unbound-control tool, or a TLS capable web browser.
  * The channel is secured using TLSv1, and certificates.
  * Both the server and the client(control tool) have their own keys.
  */
@@ -87,6 +87,7 @@
 #include "sldns/parseutil.h"
 #include "sldns/wire2str.h"
 #include "sldns/sbuffer.h"
+#include "util/timeval_func.h"
 
 #ifdef HAVE_SYS_TYPES_H
 #  include <sys/types.h>
@@ -106,47 +107,6 @@
 /** what to put on statistics lines between var and value, ": " or "=" */
 #define SQ "="
 
-/** subtract timers and the values do not overflow or become negative */
-static void
-timeval_subtract(struct timeval* d, const struct timeval* end, 
-	const struct timeval* start)
-{
-#ifndef S_SPLINT_S
-	time_t end_usec = end->tv_usec;
-	d->tv_sec = end->tv_sec - start->tv_sec;
-	if(end_usec < start->tv_usec) {
-		end_usec += 1000000;
-		d->tv_sec--;
-	}
-	d->tv_usec = end_usec - start->tv_usec;
-#endif
-}
-
-/** divide sum of timers to get average */
-static void
-timeval_divide(struct timeval* avg, const struct timeval* sum, long long d)
-{
-#ifndef S_SPLINT_S
-	size_t leftover;
-	if(d <= 0) {
-		avg->tv_sec = 0;
-		avg->tv_usec = 0;
-		return;
-	}
-	avg->tv_sec = sum->tv_sec / d;
-	avg->tv_usec = sum->tv_usec / d;
-	/* handle fraction from seconds divide */
-	leftover = sum->tv_sec - avg->tv_sec*d;
-	if(leftover <= 0)
-		leftover = 0;
-	avg->tv_usec += (((long long)leftover)*((long long)1000000))/d;
-	if(avg->tv_sec < 0)
-		avg->tv_sec = 0;
-	if(avg->tv_usec < 0)
-		avg->tv_usec = 0;
-#endif
-}
-
 static int
 remote_setup_ctx(struct daemon_remote* rc, struct config_file* cfg)
 {
@@ -201,7 +161,7 @@ remote_setup_ctx(struct daemon_remote* rc, struct config_file* cfg)
 struct daemon_remote*
 daemon_remote_create(struct config_file* cfg)
 {
-	struct daemon_remote* rc = (struct daemon_remote*)calloc(1, 
+	struct daemon_remote* rc = (struct daemon_remote*)calloc(1,
 		sizeof(*rc));
 	if(!rc) {
 		log_err("out of memory in daemon_remote_create");
@@ -410,7 +370,7 @@ accept_open(struct daemon_remote* rc, int fd)
 	n->next = rc->accept_list;
 	rc->accept_list = n;
 	/* open commpt */
-	n->com = comm_point_create_raw(rc->worker->base, fd, 0, 
+	n->com = comm_point_create_raw(rc->worker->base, fd, 0,
 		&remote_accept_callback, rc);
 	if(!n->com)
 		return 0;
@@ -419,7 +379,7 @@ accept_open(struct daemon_remote* rc, int fd)
 	return 1;
 }
 
-int daemon_remote_open_accept(struct daemon_remote* rc, 
+int daemon_remote_open_accept(struct daemon_remote* rc,
 	struct listen_port* ports, struct worker* worker)
 {
 	struct listen_port* p;
@@ -437,7 +397,7 @@ void daemon_remote_stop_accept(struct daemon_remote* rc)
 {
 	struct listen_list* p;
 	for(p=rc->accept_list; p; p=p->next) {
-		comm_point_stop_listening(p->com);	
+		comm_point_stop_listening(p->com);
 	}
 }
 
@@ -445,11 +405,11 @@ void daemon_remote_start_accept(struct daemon_remote* rc)
 {
 	struct listen_list* p;
 	for(p=rc->accept_list; p; p=p->next) {
-		comm_point_start_listening(p->com, -1, -1);	
+		comm_point_start_listening(p->com, -1, -1);
 	}
 }
 
-int remote_accept_callback(struct comm_point* c, void* arg, int err, 
+int remote_accept_callback(struct comm_point* c, void* arg, int err,
 	struct comm_reply* ATTR_UNUSED(rep))
 {
 	struct daemon_remote* rc = (struct daemon_remote*)arg;
@@ -481,7 +441,7 @@ int remote_accept_callback(struct comm_point* c, void* arg, int err,
 	}
 	n->fd = newfd;
 	/* start in reading state */
-	n->c = comm_point_create_raw(rc->worker->base, newfd, 0, 
+	n->c = comm_point_create_raw(rc->worker->base, newfd, 0,
 		&remote_control_callback, n);
 	if(!n->c) {
 		log_err("out of memory");
@@ -521,7 +481,7 @@ int remote_accept_callback(struct comm_point* c, void* arg, int err,
 	rc->busy_list = n;
 	rc->active ++;
 
-	/* perform the first nonblocking read already, for windows, 
+	/* perform the first nonblocking read already, for windows,
 	 * so it can return wouldblock. could be faster too. */
 	(void)remote_control_callback(n->c, n, NETEVENT_NOERROR, NULL);
 	return 0;
@@ -558,7 +518,7 @@ int
 ssl_print_text(RES* res, const char* text)
 {
 	int r;
-	if(!res) 
+	if(!res)
 		return 0;
 	if(res->ssl) {
 		ERR_clear_error();
@@ -660,7 +620,7 @@ static char*
 skipwhite(char* str)
 {
 	/* EOS \0 is not a space */
-	while( isspace((unsigned char)*str) ) 
+	while( isspace((unsigned char)*str) )
 		str++;
 	return str;
 }
@@ -708,20 +668,30 @@ static int
 print_stats(RES* ssl, const char* nm, struct ub_stats_info* s)
 {
 	struct timeval sumwait, avg;
-	if(!ssl_printf(ssl, "%s.num.queries"SQ"%lu\n", nm, 
+	if(!ssl_printf(ssl, "%s.num.queries"SQ"%lu\n", nm,
 		(unsigned long)s->svr.num_queries)) return 0;
 	if(!ssl_printf(ssl, "%s.num.queries_ip_ratelimited"SQ"%lu\n", nm,
 		(unsigned long)s->svr.num_queries_ip_ratelimited)) return 0;
-	if(!ssl_printf(ssl, "%s.num.cachehits"SQ"%lu\n", nm, 
-		(unsigned long)(s->svr.num_queries 
+	if(!ssl_printf(ssl, "%s.num.queries_cookie_valid"SQ"%lu\n", nm,
+		(unsigned long)s->svr.num_queries_cookie_valid)) return 0;
+	if(!ssl_printf(ssl, "%s.num.queries_cookie_client"SQ"%lu\n", nm,
+		(unsigned long)s->svr.num_queries_cookie_client)) return 0;
+	if(!ssl_printf(ssl, "%s.num.queries_cookie_invalid"SQ"%lu\n", nm,
+		(unsigned long)s->svr.num_queries_cookie_invalid)) return 0;
+	if(!ssl_printf(ssl, "%s.num.cachehits"SQ"%lu\n", nm,
+		(unsigned long)(s->svr.num_queries
 			- s->svr.num_queries_missed_cache))) return 0;
-	if(!ssl_printf(ssl, "%s.num.cachemiss"SQ"%lu\n", nm, 
+	if(!ssl_printf(ssl, "%s.num.cachemiss"SQ"%lu\n", nm,
 		(unsigned long)s->svr.num_queries_missed_cache)) return 0;
-	if(!ssl_printf(ssl, "%s.num.prefetch"SQ"%lu\n", nm, 
+	if(!ssl_printf(ssl, "%s.num.prefetch"SQ"%lu\n", nm,
 		(unsigned long)s->svr.num_queries_prefetch)) return 0;
+	if(!ssl_printf(ssl, "%s.num.queries_timed_out"SQ"%lu\n", nm,
+		(unsigned long)s->svr.num_queries_timed_out)) return 0;
+	if(!ssl_printf(ssl, "%s.query.queue_time_us.max"SQ"%lu\n", nm,
+		(unsigned long)s->svr.max_query_time_us)) return 0;
 	if(!ssl_printf(ssl, "%s.num.expired"SQ"%lu\n", nm,
 		(unsigned long)s->svr.ans_expired)) return 0;
-	if(!ssl_printf(ssl, "%s.num.recursivereplies"SQ"%lu\n", nm, 
+	if(!ssl_printf(ssl, "%s.num.recursivereplies"SQ"%lu\n", nm,
 		(unsigned long)s->mesh_replies_sent)) return 0;
 #ifdef USE_DNSCRYPT
 	if(!ssl_printf(ssl, "%s.num.dnscrypt.crypted"SQ"%lu\n", nm,
@@ -755,7 +725,7 @@ print_stats(RES* ssl, const char* nm, struct ub_stats_info* s)
 	timeval_divide(&avg, &sumwait, s->mesh_replies_sent);
 	if(!ssl_printf(ssl, "%s.recursion.time.avg"SQ ARG_LL "d.%6.6d\n", nm,
 		(long long)avg.tv_sec, (int)avg.tv_usec)) return 0;
-	if(!ssl_printf(ssl, "%s.recursion.time.median"SQ"%g\n", nm, 
+	if(!ssl_printf(ssl, "%s.recursion.time.median"SQ"%g\n", nm,
 		s->mesh_time_median)) return 0;
 	if(!ssl_printf(ssl, "%s.tcpusage"SQ"%lu\n", nm,
 		(unsigned long)s->svr.tcp_accept_usage)) return 0;
@@ -780,7 +750,7 @@ print_longnum(RES* ssl, const char* desc, size_t x)
 		/* more than a Gb */
 		size_t front = x / (size_t)1000000;
 		size_t back = x % (size_t)1000000;
-		return ssl_printf(ssl, "%s%u%6.6u\n", desc, 
+		return ssl_printf(ssl, "%s%u%6.6u\n", desc,
 			(unsigned)front, (unsigned)back);
 	} else {
 		return ssl_printf(ssl, "%s%lu\n", desc, (unsigned long)x);
@@ -880,11 +850,11 @@ print_uptime(RES* ssl, struct worker* worker, int reset)
 	timeval_subtract(&dt, &now, &worker->daemon->time_last_stat);
 	if(reset)
 		worker->daemon->time_last_stat = now;
-	if(!ssl_printf(ssl, "time.now"SQ ARG_LL "d.%6.6d\n", 
+	if(!ssl_printf(ssl, "time.now"SQ ARG_LL "d.%6.6d\n",
 		(long long)now.tv_sec, (unsigned)now.tv_usec)) return 0;
-	if(!ssl_printf(ssl, "time.up"SQ ARG_LL "d.%6.6d\n", 
+	if(!ssl_printf(ssl, "time.up"SQ ARG_LL "d.%6.6d\n",
 		(long long)up.tv_sec, (unsigned)up.tv_usec)) return 0;
-	if(!ssl_printf(ssl, "time.elapsed"SQ ARG_LL "d.%6.6d\n", 
+	if(!ssl_printf(ssl, "time.elapsed"SQ ARG_LL "d.%6.6d\n",
 		(long long)dt.tv_sec, (unsigned)dt.tv_usec)) return 0;
 	return 1;
 }
@@ -902,7 +872,7 @@ print_hist(RES* ssl, struct ub_stats_info* s)
 	}
 	timehist_import(hist, s->svr.hist, NUM_BUCKETS_HIST);
 	for(i=0; i<hist->num; i++) {
-		if(!ssl_printf(ssl, 
+		if(!ssl_printf(ssl,
 			"histogram.%6.6d.%6.6d.to.%6.6d.%6.6d=%lu\n",
 			(int)hist->buckets[i].lower.tv_sec,
 			(int)hist->buckets[i].lower.tv_usec,
@@ -945,11 +915,11 @@ print_ext(RES* ssl, struct ub_stats_info* s, int inhibit_zero)
 		} else {
 			snprintf(nm, sizeof(nm), "TYPE%d", i);
 		}
-		if(!ssl_printf(ssl, "num.query.type.%s"SQ"%lu\n", 
+		if(!ssl_printf(ssl, "num.query.type.%s"SQ"%lu\n",
 			nm, (unsigned long)s->svr.qtype[i])) return 0;
 	}
 	if(!inhibit_zero || s->svr.qtype_big) {
-		if(!ssl_printf(ssl, "num.query.type.other"SQ"%lu\n", 
+		if(!ssl_printf(ssl, "num.query.type.other"SQ"%lu\n",
 			(unsigned long)s->svr.qtype_big)) return 0;
 	}
 	/* CLASS */
@@ -962,11 +932,11 @@ print_ext(RES* ssl, struct ub_stats_info* s, int inhibit_zero)
 		} else {
 			snprintf(nm, sizeof(nm), "CLASS%d", i);
 		}
-		if(!ssl_printf(ssl, "num.query.class.%s"SQ"%lu\n", 
+		if(!ssl_printf(ssl, "num.query.class.%s"SQ"%lu\n",
 			nm, (unsigned long)s->svr.qclass[i])) return 0;
 	}
 	if(!inhibit_zero || s->svr.qclass_big) {
-		if(!ssl_printf(ssl, "num.query.class.other"SQ"%lu\n", 
+		if(!ssl_printf(ssl, "num.query.class.other"SQ"%lu\n",
 			(unsigned long)s->svr.qclass_big)) return 0;
 	}
 	/* OPCODE */
@@ -979,44 +949,44 @@ print_ext(RES* ssl, struct ub_stats_info* s, int inhibit_zero)
 		} else {
 			snprintf(nm, sizeof(nm), "OPCODE%d", i);
 		}
-		if(!ssl_printf(ssl, "num.query.opcode.%s"SQ"%lu\n", 
+		if(!ssl_printf(ssl, "num.query.opcode.%s"SQ"%lu\n",
 			nm, (unsigned long)s->svr.qopcode[i])) return 0;
 	}
 	/* transport */
-	if(!ssl_printf(ssl, "num.query.tcp"SQ"%lu\n", 
+	if(!ssl_printf(ssl, "num.query.tcp"SQ"%lu\n",
 		(unsigned long)s->svr.qtcp)) return 0;
-	if(!ssl_printf(ssl, "num.query.tcpout"SQ"%lu\n", 
+	if(!ssl_printf(ssl, "num.query.tcpout"SQ"%lu\n",
 		(unsigned long)s->svr.qtcp_outgoing)) return 0;
 	if(!ssl_printf(ssl, "num.query.udpout"SQ"%lu\n",
 		(unsigned long)s->svr.qudp_outgoing)) return 0;
-	if(!ssl_printf(ssl, "num.query.tls"SQ"%lu\n", 
+	if(!ssl_printf(ssl, "num.query.tls"SQ"%lu\n",
 		(unsigned long)s->svr.qtls)) return 0;
-	if(!ssl_printf(ssl, "num.query.tls.resume"SQ"%lu\n", 
+	if(!ssl_printf(ssl, "num.query.tls.resume"SQ"%lu\n",
 		(unsigned long)s->svr.qtls_resume)) return 0;
-	if(!ssl_printf(ssl, "num.query.ipv6"SQ"%lu\n", 
+	if(!ssl_printf(ssl, "num.query.ipv6"SQ"%lu\n",
 		(unsigned long)s->svr.qipv6)) return 0;
 	if(!ssl_printf(ssl, "num.query.https"SQ"%lu\n",
 		(unsigned long)s->svr.qhttps)) return 0;
 	/* flags */
-	if(!ssl_printf(ssl, "num.query.flags.QR"SQ"%lu\n", 
+	if(!ssl_printf(ssl, "num.query.flags.QR"SQ"%lu\n",
 		(unsigned long)s->svr.qbit_QR)) return 0;
-	if(!ssl_printf(ssl, "num.query.flags.AA"SQ"%lu\n", 
+	if(!ssl_printf(ssl, "num.query.flags.AA"SQ"%lu\n",
 		(unsigned long)s->svr.qbit_AA)) return 0;
-	if(!ssl_printf(ssl, "num.query.flags.TC"SQ"%lu\n", 
+	if(!ssl_printf(ssl, "num.query.flags.TC"SQ"%lu\n",
 		(unsigned long)s->svr.qbit_TC)) return 0;
-	if(!ssl_printf(ssl, "num.query.flags.RD"SQ"%lu\n", 
+	if(!ssl_printf(ssl, "num.query.flags.RD"SQ"%lu\n",
 		(unsigned long)s->svr.qbit_RD)) return 0;
-	if(!ssl_printf(ssl, "num.query.flags.RA"SQ"%lu\n", 
+	if(!ssl_printf(ssl, "num.query.flags.RA"SQ"%lu\n",
 		(unsigned long)s->svr.qbit_RA)) return 0;
-	if(!ssl_printf(ssl, "num.query.flags.Z"SQ"%lu\n", 
+	if(!ssl_printf(ssl, "num.query.flags.Z"SQ"%lu\n",
 		(unsigned long)s->svr.qbit_Z)) return 0;
-	if(!ssl_printf(ssl, "num.query.flags.AD"SQ"%lu\n", 
+	if(!ssl_printf(ssl, "num.query.flags.AD"SQ"%lu\n",
 		(unsigned long)s->svr.qbit_AD)) return 0;
-	if(!ssl_printf(ssl, "num.query.flags.CD"SQ"%lu\n", 
+	if(!ssl_printf(ssl, "num.query.flags.CD"SQ"%lu\n",
 		(unsigned long)s->svr.qbit_CD)) return 0;
-	if(!ssl_printf(ssl, "num.query.edns.present"SQ"%lu\n", 
+	if(!ssl_printf(ssl, "num.query.edns.present"SQ"%lu\n",
 		(unsigned long)s->svr.qEDNS)) return 0;
-	if(!ssl_printf(ssl, "num.query.edns.DO"SQ"%lu\n", 
+	if(!ssl_printf(ssl, "num.query.edns.DO"SQ"%lu\n",
 		(unsigned long)s->svr.qEDNS_DO)) return 0;
 
 	/* RCODE */
@@ -1030,31 +1000,31 @@ print_ext(RES* ssl, struct ub_stats_info* s, int inhibit_zero)
 		} else {
 			snprintf(nm, sizeof(nm), "RCODE%d", i);
 		}
-		if(!ssl_printf(ssl, "num.answer.rcode.%s"SQ"%lu\n", 
+		if(!ssl_printf(ssl, "num.answer.rcode.%s"SQ"%lu\n",
 			nm, (unsigned long)s->svr.ans_rcode[i])) return 0;
 	}
 	if(!inhibit_zero || s->svr.ans_rcode_nodata) {
-		if(!ssl_printf(ssl, "num.answer.rcode.nodata"SQ"%lu\n", 
+		if(!ssl_printf(ssl, "num.answer.rcode.nodata"SQ"%lu\n",
 			(unsigned long)s->svr.ans_rcode_nodata)) return 0;
 	}
 	/* iteration */
-	if(!ssl_printf(ssl, "num.query.ratelimited"SQ"%lu\n", 
+	if(!ssl_printf(ssl, "num.query.ratelimited"SQ"%lu\n",
 		(unsigned long)s->svr.queries_ratelimited)) return 0;
 	/* validation */
-	if(!ssl_printf(ssl, "num.answer.secure"SQ"%lu\n", 
+	if(!ssl_printf(ssl, "num.answer.secure"SQ"%lu\n",
 		(unsigned long)s->svr.ans_secure)) return 0;
-	if(!ssl_printf(ssl, "num.answer.bogus"SQ"%lu\n", 
+	if(!ssl_printf(ssl, "num.answer.bogus"SQ"%lu\n",
 		(unsigned long)s->svr.ans_bogus)) return 0;
-	if(!ssl_printf(ssl, "num.rrset.bogus"SQ"%lu\n", 
+	if(!ssl_printf(ssl, "num.rrset.bogus"SQ"%lu\n",
 		(unsigned long)s->svr.rrset_bogus)) return 0;
-	if(!ssl_printf(ssl, "num.query.aggressive.NOERROR"SQ"%lu\n", 
+	if(!ssl_printf(ssl, "num.query.aggressive.NOERROR"SQ"%lu\n",
 		(unsigned long)s->svr.num_neg_cache_noerror)) return 0;
-	if(!ssl_printf(ssl, "num.query.aggressive.NXDOMAIN"SQ"%lu\n", 
+	if(!ssl_printf(ssl, "num.query.aggressive.NXDOMAIN"SQ"%lu\n",
 		(unsigned long)s->svr.num_neg_cache_nxdomain)) return 0;
 	/* threat detection */
-	if(!ssl_printf(ssl, "unwanted.queries"SQ"%lu\n", 
+	if(!ssl_printf(ssl, "unwanted.queries"SQ"%lu\n",
 		(unsigned long)s->svr.unwanted_queries)) return 0;
-	if(!ssl_printf(ssl, "unwanted.replies"SQ"%lu\n", 
+	if(!ssl_printf(ssl, "unwanted.replies"SQ"%lu\n",
 		(unsigned long)s->svr.unwanted_replies)) return 0;
 	/* cache counts */
 	if(!ssl_printf(ssl, "msg.cache.count"SQ"%u\n",
@@ -1065,6 +1035,11 @@ print_ext(RES* ssl, struct ub_stats_info* s, int inhibit_zero)
 		(unsigned)s->svr.infra_cache_count)) return 0;
 	if(!ssl_printf(ssl, "key.cache.count"SQ"%u\n",
 		(unsigned)s->svr.key_cache_count)) return 0;
+	/* max collisions */
+	if(!ssl_printf(ssl, "msg.cache.max_collisions"SQ"%u\n",
+		(unsigned)s->svr.msg_cache_max_collisions)) return 0;
+	if(!ssl_printf(ssl, "rrset.cache.max_collisions"SQ"%u\n",
+		(unsigned)s->svr.rrset_cache_max_collisions)) return 0;
 	/* applied RPZ actions */
 	for(i=0; i<UB_STATS_RPZ_ACTION_NUM; i++) {
 		if(i == RPZ_NO_OVERRIDE_ACTION)
@@ -1095,6 +1070,10 @@ print_ext(RES* ssl, struct ub_stats_info* s, int inhibit_zero)
 	if(!ssl_printf(ssl, "num.query.subnet_cache"SQ"%lu\n",
 		(unsigned long)s->svr.num_query_subnet_cache)) return 0;
 #endif /* CLIENT_SUBNET */
+#ifdef USE_CACHEDB
+	if(!ssl_printf(ssl, "num.query.cachedb"SQ"%lu\n",
+		(unsigned long)s->svr.num_query_cachedb)) return 0;
+#endif /* USE_CACHEDB */
 	return 1;
 }
 
@@ -1119,7 +1098,7 @@ do_stats(RES* ssl, struct worker* worker, int reset)
 	}
 	/* print the thread statistics */
 	total.mesh_time_median /= (double)daemon->num;
-	if(!print_stats(ssl, "total", &total)) 
+	if(!print_stats(ssl, "total", &total))
 		return;
 	if(!print_uptime(ssl, worker, reset))
 		return;
@@ -1208,7 +1187,7 @@ perform_zone_add(RES* ssl, struct local_zones* zones, char* arg)
 		return 0;
 	}
 	lock_rw_wrlock(&zones->lock);
-	if((z=local_zones_find(zones, nm, nmlen, 
+	if((z=local_zones_find(zones, nm, nmlen,
 		nmlabs, LDNS_RR_CLASS_IN))) {
 		/* already present in tree */
 		lock_rw_wrlock(&z->lock);
@@ -1218,7 +1197,7 @@ perform_zone_add(RES* ssl, struct local_zones* zones, char* arg)
 		lock_rw_unlock(&zones->lock);
 		return 1;
 	}
-	if(!local_zones_add_zone(zones, nm, nmlen, 
+	if(!local_zones_add_zone(zones, nm, nmlen,
 		nmlabs, LDNS_RR_CLASS_IN, t)) {
 		lock_rw_unlock(&zones->lock);
 		ssl_printf(ssl, "error out of memory\n");
@@ -1267,7 +1246,7 @@ perform_zone_remove(RES* ssl, struct local_zones* zones, char* arg)
 	if(!parse_arg_name(ssl, arg, &nm, &nmlen, &nmlabs))
 		return 0;
 	lock_rw_wrlock(&zones->lock);
-	if((z=local_zones_find(zones, nm, nmlen, 
+	if((z=local_zones_find(zones, nm, nmlen,
 		nmlabs, LDNS_RR_CLASS_IN))) {
 		/* present in tree */
 		local_zones_del_zone(zones, z);
@@ -1608,8 +1587,11 @@ do_flush_type(RES* ssl, struct worker* worker, char* arg)
 	if(!parse_arg_name(ssl, arg, &nm, &nmlen, &nmlabs))
 		return;
 	t = sldns_get_rr_type_by_name(arg2);
+	if(t == 0 && strcmp(arg2, "TYPE0") != 0) {
+		return;
+	}
 	do_cache_remove(worker, nm, nmlen, t, LDNS_RR_CLASS_IN);
-	
+
 	free(nm);
 	send_ok(ssl);
 }
@@ -1719,7 +1701,7 @@ zone_del_rrset(struct lruhash_entry* e, void* arg)
 	struct del_info* inf = (struct del_info*)arg;
 	struct ub_packed_rrset_key* k = (struct ub_packed_rrset_key*)e->key;
 	if(dname_subdomain_c(k->rk.dname, inf->name)) {
-		struct packed_rrset_data* d = 
+		struct packed_rrset_data* d =
 			(struct packed_rrset_data*)e->data;
 		if(d->ttl > inf->expired) {
 			d->ttl = inf->expired;
@@ -1783,21 +1765,21 @@ do_flush_zone(RES* ssl, struct worker* worker, char* arg)
 	inf.num_rrsets = 0;
 	inf.num_msgs = 0;
 	inf.num_keys = 0;
-	slabhash_traverse(&worker->env.rrset_cache->table, 1, 
+	slabhash_traverse(&worker->env.rrset_cache->table, 1,
 		&zone_del_rrset, &inf);
 
 	slabhash_traverse(worker->env.msg_cache, 1, &zone_del_msg, &inf);
 
 	/* and validator cache */
 	if(worker->env.key_cache) {
-		slabhash_traverse(worker->env.key_cache->slab, 1, 
+		slabhash_traverse(worker->env.key_cache->slab, 1,
 			&zone_del_kcache, &inf);
 	}
 
 	free(nm);
 
 	(void)ssl_printf(ssl, "ok removed %lu rrsets, %lu messages "
-		"and %lu key entries\n", (unsigned long)inf.num_rrsets, 
+		"and %lu key entries\n", (unsigned long)inf.num_rrsets,
 		(unsigned long)inf.num_msgs, (unsigned long)inf.num_keys);
 }
 
@@ -1852,19 +1834,19 @@ do_flush_bogus(RES* ssl, struct worker* worker)
 	inf.num_rrsets = 0;
 	inf.num_msgs = 0;
 	inf.num_keys = 0;
-	slabhash_traverse(&worker->env.rrset_cache->table, 1, 
+	slabhash_traverse(&worker->env.rrset_cache->table, 1,
 		&bogus_del_rrset, &inf);
 
 	slabhash_traverse(worker->env.msg_cache, 1, &bogus_del_msg, &inf);
 
 	/* and validator cache */
 	if(worker->env.key_cache) {
-		slabhash_traverse(worker->env.key_cache->slab, 1, 
+		slabhash_traverse(worker->env.key_cache->slab, 1,
 			&bogus_del_kcache, &inf);
 	}
 
 	(void)ssl_printf(ssl, "ok removed %lu rrsets, %lu messages "
-		"and %lu key entries\n", (unsigned long)inf.num_rrsets, 
+		"and %lu key entries\n", (unsigned long)inf.num_rrsets,
 		(unsigned long)inf.num_msgs, (unsigned long)inf.num_keys);
 }
 
@@ -1927,19 +1909,19 @@ do_flush_negative(RES* ssl, struct worker* worker)
 	inf.num_rrsets = 0;
 	inf.num_msgs = 0;
 	inf.num_keys = 0;
-	slabhash_traverse(&worker->env.rrset_cache->table, 1, 
+	slabhash_traverse(&worker->env.rrset_cache->table, 1,
 		&negative_del_rrset, &inf);
 
 	slabhash_traverse(worker->env.msg_cache, 1, &negative_del_msg, &inf);
 
 	/* and validator cache */
 	if(worker->env.key_cache) {
-		slabhash_traverse(worker->env.key_cache->slab, 1, 
+		slabhash_traverse(worker->env.key_cache->slab, 1,
 			&negative_del_kcache, &inf);
 	}
 
 	(void)ssl_printf(ssl, "ok removed %lu rrsets, %lu messages "
-		"and %lu key entries\n", (unsigned long)inf.num_rrsets, 
+		"and %lu key entries\n", (unsigned long)inf.num_rrsets,
 		(unsigned long)inf.num_msgs, (unsigned long)inf.num_keys);
 }
 
@@ -1964,7 +1946,7 @@ do_flush_name(RES* ssl, struct worker* w, char* arg)
 	do_cache_remove(w, nm, nmlen, LDNS_RR_TYPE_NAPTR, LDNS_RR_CLASS_IN);
 	do_cache_remove(w, nm, nmlen, LDNS_RR_TYPE_SVCB, LDNS_RR_CLASS_IN);
 	do_cache_remove(w, nm, nmlen, LDNS_RR_TYPE_HTTPS, LDNS_RR_CLASS_IN);
-	
+
 	free(nm);
 	send_ok(ssl);
 }
@@ -2334,7 +2316,7 @@ do_status(RES* ssl, struct worker* worker)
 	uptime = (time_t)time(NULL) - (time_t)worker->daemon->time_boot.tv_sec;
 	if(!ssl_printf(ssl, "uptime: " ARG_LL "d seconds\n", (long long)uptime))
 		return;
-	if(!ssl_printf(ssl, "options:%s%s%s%s\n" , 
+	if(!ssl_printf(ssl, "options:%s%s%s%s\n" ,
 		(worker->daemon->reuseport?" reuseport":""),
 		(worker->daemon->rc->accept_list?" control":""),
 		(worker->daemon->rc->accept_list && worker->daemon->rc->use_cert?"(ssl)":""),
@@ -2348,7 +2330,7 @@ do_status(RES* ssl, struct worker* worker)
 
 /** get age for the mesh state */
 static void
-get_mesh_age(struct mesh_state* m, char* buf, size_t len, 
+get_mesh_age(struct mesh_state* m, char* buf, size_t len,
 	struct module_env* env)
 {
 	if(m->reply_list) {
@@ -2367,7 +2349,7 @@ get_mesh_age(struct mesh_state* m, char* buf, size_t len,
 
 /** get status of a mesh state */
 static void
-get_mesh_status(struct mesh_area* mesh, struct mesh_state* m, 
+get_mesh_status(struct mesh_area* mesh, struct mesh_state* m,
 	char* buf, size_t len)
 {
 	enum module_ext_state s = m->s.ext_state[m->s.curmod];
@@ -2389,7 +2371,7 @@ get_mesh_status(struct mesh_area* mesh, struct mesh_state* m,
 			snprintf(buf, len, " ");
 			l = strlen(buf);
 			buf += l; len -= l;
-			addr_to_str(&e->qsent->addr, e->qsent->addrlen, 
+			addr_to_str(&e->qsent->addr, e->qsent->addrlen,
 				buf, len);
 			l = strlen(buf);
 			buf += l; len -= l;
@@ -2442,7 +2424,7 @@ do_dump_requestlist(RES* ssl, struct worker* worker)
 		dname_str(m->s.qinfo.qname, buf);
 		get_mesh_age(m, timebuf, sizeof(timebuf), &worker->env);
 		get_mesh_status(mesh, m, statbuf, sizeof(statbuf));
-		if(!ssl_printf(ssl, "%3d %4s %2s %s %s %s\n", 
+		if(!ssl_printf(ssl, "%3d %4s %2s %s %s %s\n",
 			num, (t?t:"TYPE??"), (c?c:"CLASS??"), buf, timebuf,
 			statbuf)) {
 			free(t);
@@ -2632,7 +2614,7 @@ do_auth_zone_transfer(RES* ssl, struct worker* worker, char* arg)
 	free(nm);
 	send_ok(ssl);
 }
-	
+
 /** do the set_option command */
 static void
 do_set_option(RES* ssl, struct worker* worker, char* arg)
@@ -2770,7 +2752,7 @@ do_list_local_zones(RES* ssl, struct local_zones* zones)
 	RBTREE_FOR(z, struct local_zone*, &zones->ztree) {
 		lock_rw_rdlock(&z->lock);
 		dname_str(z->name, buf);
-		if(!ssl_printf(ssl, "%s %s\n", buf, 
+		if(!ssl_printf(ssl, "%s %s\n", buf,
 			local_zone_type2str(z->type))) {
 			/* failure to print */
 			lock_rw_unlock(&z->lock);
@@ -2999,7 +2981,7 @@ static void
 distribute_cmd(struct daemon_remote* rc, RES* ssl, char* cmd)
 {
 	int i;
-	if(!cmd || !ssl) 
+	if(!cmd || !ssl)
 		return;
 	/* skip i=0 which is me */
 	for(i=1; i<rc->worker->daemon->num; i++) {
@@ -3022,7 +3004,7 @@ cmdcmp(char* p, const char* cmd, size_t len)
 
 /** execute a remote control command */
 static void
-execute_cmd(struct daemon_remote* rc, RES* ssl, char* cmd, 
+execute_cmd(struct daemon_remote* rc, RES* ssl, char* cmd,
 	struct worker* worker)
 {
 	char* p = skipwhite(cmd);
@@ -3206,7 +3188,7 @@ execute_cmd(struct daemon_remote* rc, RES* ssl, char* cmd,
 	}
 }
 
-void 
+void
 daemon_remote_exec(struct worker* worker)
 {
 	/* read the cmd string */
@@ -3315,7 +3297,7 @@ remote_handshake_later(struct daemon_remote* rc, struct rc_state* s,
 	return 0;
 }
 
-int remote_control_callback(struct comm_point* c, void* arg, int err, 
+int remote_control_callback(struct comm_point* c, void* arg, int err,
 	struct comm_reply* ATTR_UNUSED(rep))
 {
 	RES res;
@@ -3323,7 +3305,7 @@ int remote_control_callback(struct comm_point* c, void* arg, int err,
 	struct daemon_remote* rc = s->rc;
 	int r;
 	if(err != NETEVENT_NOERROR) {
-		if(err==NETEVENT_TIMEOUT) 
+		if(err==NETEVENT_TIMEOUT)
 			log_err("remote control timed out");
 		clean_point(rc, s);
 		return 0;
diff --git a/contrib/unbound/daemon/remote.h b/contrib/unbound/daemon/remote.h
index 217ea21e80c1..4902803f5e42 100644
--- a/contrib/unbound/daemon/remote.h
+++ b/contrib/unbound/daemon/remote.h
@@ -46,7 +46,7 @@
 #ifndef DAEMON_REMOTE_H
 #define DAEMON_REMOTE_H
 #ifdef HAVE_OPENSSL_SSL_H
-#include "openssl/ssl.h"
+#include <openssl/ssl.h>
 #endif
 struct config_file;
 struct listen_list;
diff --git a/contrib/unbound/daemon/stats.c b/contrib/unbound/daemon/stats.c
index 6b3834977844..4855bf1c1d2d 100644
--- a/contrib/unbound/daemon/stats.c
+++ b/contrib/unbound/daemon/stats.c
@@ -4,22 +4,22 @@
  * Copyright (c) 2007, NLnet Labs. All rights reserved.
  *
  * This software is open source.
- * 
+ *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
- * 
+ *
  * Redistributions of source code must retain the above copyright notice,
  * this list of conditions and the following disclaimer.
- * 
+ *
  * Redistributions in binary form must reproduce the above copyright notice,
  * this list of conditions and the following disclaimer in the documentation
  * and/or other materials provided with the distribution.
- * 
+ *
  * Neither the name of the NLNET LABS nor the names of its contributors may
  * be used to endorse or promote products derived from this software without
  * specific prior written permission.
- * 
+ *
  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
@@ -116,8 +116,8 @@ void server_stats_log(struct ub_server_stats* stats, struct worker* worker,
 	log_info("server stats for thread %d: %u queries, "
 		"%u answers from cache, %u recursions, %u prefetch, %u rejected by "
 		"ip ratelimiting",
-		threadnum, (unsigned)stats->num_queries, 
-		(unsigned)(stats->num_queries - 
+		threadnum, (unsigned)stats->num_queries,
+		(unsigned)(stats->num_queries -
 			stats->num_queries_missed_cache),
 		(unsigned)stats->num_queries_missed_cache,
 		(unsigned)stats->num_queries_prefetch,
@@ -279,7 +279,7 @@ server_stats_compile(struct worker* worker, struct ub_stats_info* s, int reset)
 		s->svr.ans_rcode[i] += (long long)worker->env.mesh->ans_rcode[i];
 	for(i=0; i<UB_STATS_RPZ_ACTION_NUM; i++)
 		s->svr.rpz_action[i] += (long long)worker->env.mesh->rpz_action[i];
-	timehist_export(worker->env.mesh->histogram, s->svr.hist, 
+	timehist_export(worker->env.mesh->histogram, s->svr.hist,
 		NUM_BUCKETS_HIST);
 	/* values from outside network */
 	s->svr.unwanted_replies = (long long)worker->back->unwanted_replies;
@@ -293,8 +293,10 @@ server_stats_compile(struct worker* worker, struct ub_stats_info* s, int reset)
 	s->svr.queries_ratelimited = (long long)get_queries_ratelimit(worker, reset);
 
 	/* get cache sizes */
-	s->svr.msg_cache_count = (long long)count_slabhash_entries(worker->env.msg_cache);
-	s->svr.rrset_cache_count = (long long)count_slabhash_entries(&worker->env.rrset_cache->table);
+	get_slabhash_stats(worker->env.msg_cache,
+		&s->svr.msg_cache_count, &s->svr.msg_cache_max_collisions);
+	get_slabhash_stats(&worker->env.rrset_cache->table,
+		&s->svr.rrset_cache_count, &s->svr.rrset_cache_max_collisions);
 	s->svr.infra_cache_count = (long long)count_slabhash_entries(worker->env.infra_cache->hosts);
 	if(worker->env.key_cache)
 		s->svr.key_cache_count = (long long)count_slabhash_entries(worker->env.key_cache->slab);
@@ -354,6 +356,11 @@ server_stats_compile(struct worker* worker, struct ub_stats_info* s, int reset)
 	s->svr.num_query_subnet = 0;
 	s->svr.num_query_subnet_cache = 0;
 #endif
+#ifdef USE_CACHEDB
+	s->svr.num_query_cachedb = (long long)worker->env.mesh->ans_cachedb;
+#else
+	s->svr.num_query_cachedb = 0;
+#endif
 
 	/* get tcp accept usage */
 	s->svr.tcp_accept_usage = 0;
@@ -419,7 +426,7 @@ void server_stats_reply(struct worker* worker, int reset)
 	struct ub_stats_info s;
 	server_stats_compile(worker, &s, reset);
 	verbose(VERB_ALGO, "write stats replymsg");
-	if(!tube_write_msg(worker->daemon->workers[0]->cmd, 
+	if(!tube_write_msg(worker->daemon->workers[0]->cmd,
 		(uint8_t*)&s, sizeof(s), 0))
 		fatal_exit("could not write stat values over cmd channel");
 }
@@ -428,8 +435,14 @@ void server_stats_add(struct ub_stats_info* total, struct ub_stats_info* a)
 {
 	total->svr.num_queries += a->svr.num_queries;
 	total->svr.num_queries_ip_ratelimited += a->svr.num_queries_ip_ratelimited;
+	total->svr.num_queries_cookie_valid += a->svr.num_queries_cookie_valid;
+	total->svr.num_queries_cookie_client += a->svr.num_queries_cookie_client;
+	total->svr.num_queries_cookie_invalid += a->svr.num_queries_cookie_invalid;
 	total->svr.num_queries_missed_cache += a->svr.num_queries_missed_cache;
 	total->svr.num_queries_prefetch += a->svr.num_queries_prefetch;
+	total->svr.num_queries_timed_out += a->svr.num_queries_timed_out;
+	if (total->svr.max_query_time_us < a->svr.max_query_time_us)
+		total->svr.max_query_time_us = a->svr.max_query_time_us;
 	total->svr.sum_query_list_size += a->svr.sum_query_list_size;
 	total->svr.ans_expired += a->svr.ans_expired;
 #ifdef USE_DNSCRYPT
@@ -471,6 +484,9 @@ void server_stats_add(struct ub_stats_info* total, struct ub_stats_info* a)
 		total->svr.unwanted_replies += a->svr.unwanted_replies;
 		total->svr.unwanted_queries += a->svr.unwanted_queries;
 		total->svr.tcp_accept_usage += a->svr.tcp_accept_usage;
+#ifdef USE_CACHEDB
+		total->svr.num_query_cachedb += a->svr.num_query_cachedb;
+#endif
 		for(i=0; i<UB_STATS_QTYPE_NUM; i++)
 			total->svr.qtype[i] += a->svr.qtype[i];
 		for(i=0; i<UB_STATS_QCLASS_NUM; i++)
@@ -514,7 +530,7 @@ void server_stats_insquery(struct ub_server_stats* stats, struct comm_point* c,
 		if(c->ssl != NULL) {
 			stats->qtls++;
 #ifdef HAVE_SSL
-			if(SSL_session_reused(c->ssl)) 
+			if(SSL_session_reused(c->ssl))
 				stats->qtls_resume++;
 #endif
 			if(c->type == comm_http)
@@ -555,3 +571,16 @@ void server_stats_insrcode(struct ub_server_stats* stats, sldns_buffer* buf)
 			stats->ans_rcode_nodata ++;
 	}
 }
+
+void server_stats_downstream_cookie(struct ub_server_stats* stats,
+	struct edns_data* edns)
+{
+	if(!(edns->edns_present && edns->cookie_present)) return;
+	if(edns->cookie_valid) {
+		stats->num_queries_cookie_valid++;
+	} else if(edns->cookie_client) {
+		stats->num_queries_cookie_client++;
+	} else {
+		stats->num_queries_cookie_invalid++;
+	}
+}
diff --git a/contrib/unbound/daemon/stats.h b/contrib/unbound/daemon/stats.h
index 4e5e6cf8aed5..47bb20d7f8a7 100644
--- a/contrib/unbound/daemon/stats.h
+++ b/contrib/unbound/daemon/stats.h
@@ -126,4 +126,11 @@ void server_stats_insquery(struct ub_server_stats* stats, struct comm_point* c,
  */
 void server_stats_insrcode(struct ub_server_stats* stats, struct sldns_buffer* buf);
 
+/**
+ * Add DNS Cookie stats for this query
+ * @param stats: the stats
+ * @param edns: edns record
+ */
+void server_stats_downstream_cookie(struct ub_server_stats* stats,
+	struct edns_data* edns);
 #endif /* DAEMON_STATS_H */
diff --git a/contrib/unbound/daemon/worker.c b/contrib/unbound/daemon/worker.c
index 99dcf9940004..8c6fa3b9af33 100644
--- a/contrib/unbound/daemon/worker.c
+++ b/contrib/unbound/daemon/worker.c
@@ -4,22 +4,22 @@
  * Copyright (c) 2007, NLnet Labs. All rights reserved.
  *
  * This software is open source.
- * 
+ *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
- * 
+ *
  * Redistributions of source code must retain the above copyright notice,
  * this list of conditions and the following disclaimer.
- * 
+ *
  * Redistributions in binary form must reproduce the above copyright notice,
  * this list of conditions and the following disclaimer in the documentation
  * and/or other materials provided with the distribution.
- * 
+ *
  * Neither the name of the NLNET LABS nor the names of its contributors may
  * be used to endorse or promote products derived from this software without
  * specific prior written permission.
- * 
+ *
  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
@@ -68,6 +68,7 @@
 #include "util/fptr_wlist.h"
 #include "util/tube.h"
 #include "util/edns.h"
+#include "util/timeval_func.h"
 #include "iterator/iter_fwd.h"
 #include "iterator/iter_hints.h"
 #include "iterator/iter_utils.h"
@@ -112,7 +113,7 @@
 
 /** Report on memory usage by this thread and global */
 static void
-worker_mem_report(struct worker* ATTR_UNUSED(worker), 
+worker_mem_report(struct worker* ATTR_UNUSED(worker),
 	struct serviced_query* ATTR_UNUSED(cur_serv))
 {
 #ifdef UNBOUND_ALLOC_STATS
@@ -125,7 +126,7 @@ worker_mem_report(struct worker* ATTR_UNUSED(worker),
 #ifdef CLIENT_SUBNET
 	size_t subnet = 0;
 #endif /* CLIENT_SUBNET */
-	if(verbosity < VERB_ALGO) 
+	if(verbosity < VERB_ALGO)
 		return;
 	front = listen_get_mem(worker->front);
 	back = outnet_get_mem(worker->back);
@@ -154,10 +155,10 @@ worker_mem_report(struct worker* ATTR_UNUSED(worker),
 				(&worker->env, i);
 	}
 	me = sizeof(*worker) + sizeof(*worker->base) + sizeof(*worker->comsig)
-		+ comm_point_get_mem(worker->cmd_com) 
-		+ sizeof(worker->rndstate) 
-		+ regional_get_mem(worker->scratchpad) 
-		+ sizeof(*worker->env.scratch_buffer) 
+		+ comm_point_get_mem(worker->cmd_com)
+		+ sizeof(worker->rndstate)
+		+ regional_get_mem(worker->scratchpad)
+		+ sizeof(*worker->env.scratch_buffer)
 		+ sldns_buffer_capacity(worker->env.scratch_buffer)
 		+ forwards_get_mem(worker->env.fwds)
 		+ hints_get_mem(worker->env.hints);
@@ -172,7 +173,7 @@ worker_mem_report(struct worker* ATTR_UNUSED(worker),
 	log_info("Memory conditions: %u front=%u back=%u mesh=%u msg=%u "
 		"rrset=%u infra=%u iter=%u val=%u subnet=%u anchors=%u "
 		"alloccache=%u globalalloccache=%u me=%u",
-		(unsigned)total, (unsigned)front, (unsigned)back, 
+		(unsigned)total, (unsigned)front, (unsigned)back,
 		(unsigned)mesh, (unsigned)msg, (unsigned)rrset, (unsigned)infra,
 		(unsigned)iter, (unsigned)val,
 		(unsigned)subnet, (unsigned)anch, (unsigned)ac,
@@ -181,13 +182,13 @@ worker_mem_report(struct worker* ATTR_UNUSED(worker),
 	log_info("Memory conditions: %u front=%u back=%u mesh=%u msg=%u "
 		"rrset=%u infra=%u iter=%u val=%u anchors=%u "
 		"alloccache=%u globalalloccache=%u me=%u",
-		(unsigned)total, (unsigned)front, (unsigned)back, 
-		(unsigned)mesh, (unsigned)msg, (unsigned)rrset, 
+		(unsigned)total, (unsigned)front, (unsigned)back,
+		(unsigned)mesh, (unsigned)msg, (unsigned)rrset,
 		(unsigned)infra, (unsigned)iter, (unsigned)val, (unsigned)anch,
 		(unsigned)ac, (unsigned)superac, (unsigned)me);
 #endif /* CLIENT_SUBNET */
 	log_info("Total heap memory estimate: %u  total-alloc: %u  "
-		"total-free: %u", (unsigned)total, 
+		"total-free: %u", (unsigned)total,
 		(unsigned)unbound_mem_alloc, (unsigned)unbound_mem_freed);
 #else /* no UNBOUND_ALLOC_STATS */
 	size_t val = 0;
@@ -227,7 +228,7 @@ worker_mem_report(struct worker* ATTR_UNUSED(worker),
 #endif /* UNBOUND_ALLOC_STATS */
 }
 
-void 
+void
 worker_send_cmd(struct worker* worker, enum worker_commands cmd)
 {
 	uint32_t c = (uint32_t)htonl(cmd);
@@ -236,8 +237,8 @@ worker_send_cmd(struct worker* worker, enum worker_commands cmd)
 	}
 }
 
-int 
-worker_handle_service_reply(struct comm_point* c, void* arg, int error, 
+int
+worker_handle_service_reply(struct comm_point* c, void* arg, int error,
 	struct comm_reply* reply_info)
 {
 	struct outbound_entry* e = (struct outbound_entry*)arg;
@@ -252,13 +253,13 @@ worker_handle_service_reply(struct comm_point* c, void* arg, int error,
 	}
 	/* sanity check. */
 	if(!LDNS_QR_WIRE(sldns_buffer_begin(c->buffer))
-		|| LDNS_OPCODE_WIRE(sldns_buffer_begin(c->buffer)) != 
+		|| LDNS_OPCODE_WIRE(sldns_buffer_begin(c->buffer)) !=
 			LDNS_PACKET_QUERY
 		|| LDNS_QDCOUNT(sldns_buffer_begin(c->buffer)) > 1) {
 		/* error becomes timeout for the module as if this reply
 		 * never arrived. */
 		verbose(VERB_ALGO, "worker: bad reply handled as timeout");
-		mesh_report_reply(worker->env.mesh, e, reply_info, 
+		mesh_report_reply(worker->env.mesh, e, reply_info,
 			NETEVENT_TIMEOUT);
 		worker_mem_report(worker, sq);
 		return 0;
@@ -288,64 +289,86 @@ worker_err_ratelimit(struct worker* worker, int err)
 	return err;
 }
 
+/**
+ * Structure holding the result of the worker_check_request function.
+ * Based on configuration it could be called up to four times; ideally should
+ * be called once.
+ */
+struct check_request_result {
+	int checked;
+	int value;
+};
 /** check request sanity.
  * @param pkt: the wire packet to examine for sanity.
  * @param worker: parameters for checking.
- * @return error code, 0 OK, or -1 discard.
+ * @param out: struct to update with the result.
 */
-static int 
-worker_check_request(sldns_buffer* pkt, struct worker* worker)
+static void
+worker_check_request(sldns_buffer* pkt, struct worker* worker,
+	struct check_request_result* out)
 {
+	if(out->checked) return;
+	out->checked = 1;
 	if(sldns_buffer_limit(pkt) < LDNS_HEADER_SIZE) {
 		verbose(VERB_QUERY, "request too short, discarded");
-		return -1;
+		out->value = -1;
+		return;
 	}
-	if(sldns_buffer_limit(pkt) > NORMAL_UDP_SIZE && 
+	if(sldns_buffer_limit(pkt) > NORMAL_UDP_SIZE &&
 		worker->daemon->cfg->harden_large_queries) {
 		verbose(VERB_QUERY, "request too large, discarded");
-		return -1;
+		out->value = -1;
+		return;
 	}
 	if(LDNS_QR_WIRE(sldns_buffer_begin(pkt))) {
 		verbose(VERB_QUERY, "request has QR bit on, discarded");
-		return -1;
+		out->value = -1;
+		return;
 	}
 	if(LDNS_TC_WIRE(sldns_buffer_begin(pkt))) {
 		LDNS_TC_CLR(sldns_buffer_begin(pkt));
 		verbose(VERB_QUERY, "request bad, has TC bit on");
-		return worker_err_ratelimit(worker, LDNS_RCODE_FORMERR);
+		out->value = worker_err_ratelimit(worker, LDNS_RCODE_FORMERR);
+		return;
 	}
 	if(LDNS_OPCODE_WIRE(sldns_buffer_begin(pkt)) != LDNS_PACKET_QUERY &&
 		LDNS_OPCODE_WIRE(sldns_buffer_begin(pkt)) != LDNS_PACKET_NOTIFY) {
-		verbose(VERB_QUERY, "request unknown opcode %d", 
+		verbose(VERB_QUERY, "request unknown opcode %d",
 			LDNS_OPCODE_WIRE(sldns_buffer_begin(pkt)));
-		return worker_err_ratelimit(worker, LDNS_RCODE_NOTIMPL);
+		out->value = worker_err_ratelimit(worker, LDNS_RCODE_NOTIMPL);
+		return;
 	}
 	if(LDNS_QDCOUNT(sldns_buffer_begin(pkt)) != 1) {
-		verbose(VERB_QUERY, "request wrong nr qd=%d", 
+		verbose(VERB_QUERY, "request wrong nr qd=%d",
 			LDNS_QDCOUNT(sldns_buffer_begin(pkt)));
-		return worker_err_ratelimit(worker, LDNS_RCODE_FORMERR);
+		out->value = worker_err_ratelimit(worker, LDNS_RCODE_FORMERR);
+		return;
 	}
-	if(LDNS_ANCOUNT(sldns_buffer_begin(pkt)) != 0 && 
+	if(LDNS_ANCOUNT(sldns_buffer_begin(pkt)) != 0 &&
 		(LDNS_ANCOUNT(sldns_buffer_begin(pkt)) != 1 ||
 		LDNS_OPCODE_WIRE(sldns_buffer_begin(pkt)) != LDNS_PACKET_NOTIFY)) {
-		verbose(VERB_QUERY, "request wrong nr an=%d", 
+		verbose(VERB_QUERY, "request wrong nr an=%d",
 			LDNS_ANCOUNT(sldns_buffer_begin(pkt)));
-		return worker_err_ratelimit(worker, LDNS_RCODE_FORMERR);
+		out->value = worker_err_ratelimit(worker, LDNS_RCODE_FORMERR);
+		return;
 	}
 	if(LDNS_NSCOUNT(sldns_buffer_begin(pkt)) != 0) {
-		verbose(VERB_QUERY, "request wrong nr ns=%d", 
+		verbose(VERB_QUERY, "request wrong nr ns=%d",
 			LDNS_NSCOUNT(sldns_buffer_begin(pkt)));
-		return worker_err_ratelimit(worker, LDNS_RCODE_FORMERR);
+		out->value = worker_err_ratelimit(worker, LDNS_RCODE_FORMERR);
+		return;
 	}
 	if(LDNS_ARCOUNT(sldns_buffer_begin(pkt)) > 1) {
-		verbose(VERB_QUERY, "request wrong nr ar=%d", 
+		verbose(VERB_QUERY, "request wrong nr ar=%d",
 			LDNS_ARCOUNT(sldns_buffer_begin(pkt)));
-		return worker_err_ratelimit(worker, LDNS_RCODE_FORMERR);
+		out->value = worker_err_ratelimit(worker, LDNS_RCODE_FORMERR);
+		return;
 	}
-	return 0;
+	out->value = 0;
+	return;
 }
 
-void 
+void
 worker_handle_control_cmd(struct tube* ATTR_UNUSED(tube), uint8_t* msg,
 	size_t len, int error, void* arg)
 {
@@ -388,7 +411,7 @@ worker_handle_control_cmd(struct tube* ATTR_UNUSED(tube), uint8_t* msg,
 
 /** check if a delegation is secure */
 static enum sec_status
-check_delegation_secure(struct reply_info *rep) 
+check_delegation_secure(struct reply_info *rep)
 {
 	/* return smallest security status */
 	size_t i;
@@ -424,10 +447,10 @@ deleg_remove_nonsecure_additional(struct reply_info* rep)
 		s = ((struct packed_rrset_data*)rep->rrsets[i]->entry.data)
 			->security;
 		if(s != sec_status_secure) {
-			memmove(rep->rrsets+i, rep->rrsets+i+1, 
-				sizeof(struct ub_packed_rrset_key*)* 
+			memmove(rep->rrsets+i, rep->rrsets+i+1,
+				sizeof(struct ub_packed_rrset_key*)*
 				(rep->rrset_count - i - 1));
-			rep->ar_numrrsets--; 
+			rep->ar_numrrsets--;
 			rep->rrset_count--;
 			i--;
 		}
@@ -437,27 +460,28 @@ deleg_remove_nonsecure_additional(struct reply_info* rep)
 /** answer nonrecursive query from the cache */
 static int
 answer_norec_from_cache(struct worker* worker, struct query_info* qinfo,
-	uint16_t id, uint16_t flags, struct comm_reply* repinfo, 
+	uint16_t id, uint16_t flags, struct comm_reply* repinfo,
 	struct edns_data* edns)
 {
 	/* for a nonrecursive query return either:
 	 * 	o an error (servfail; we try to avoid this)
 	 * 	o a delegation (closest we have; this routine tries that)
-	 * 	o the answer (checked by answer_from_cache) 
+	 * 	o the answer (checked by answer_from_cache)
 	 *
-	 * So, grab a delegation from the rrset cache. 
+	 * So, grab a delegation from the rrset cache.
 	 * Then check if it needs validation, if so, this routine fails,
 	 * so that iterator can prime and validator can verify rrsets.
 	 */
 	uint16_t udpsize = edns->udp_size;
 	int secure = 0;
 	time_t timenow = *worker->env.now;
-	int must_validate = (!(flags&BIT_CD) || worker->env.cfg->ignore_cd)
+	int has_cd_bit = (flags&BIT_CD);
+	int must_validate = (!has_cd_bit || worker->env.cfg->ignore_cd)
 		&& worker->env.need_to_validate;
 	struct dns_msg *msg = NULL;
 	struct delegpt *dp;
 
-	dp = dns_cache_find_delegation(&worker->env, qinfo->qname, 
+	dp = dns_cache_find_delegation(&worker->env, qinfo->qname,
 		qinfo->qname_len, qinfo->qtype, qinfo->qclass,
 		worker->scratchpad, &msg, timenow, 0, NULL, 0);
 	if(!dp) { /* no delegation, need to reprime */
@@ -470,7 +494,7 @@ answer_norec_from_cache(struct worker* worker, struct query_info* qinfo,
 	if(must_validate) {
 		switch(check_delegation_secure(msg->rep)) {
 		case sec_status_unchecked:
-			/* some rrsets have not been verified yet, go and 
+			/* some rrsets have not been verified yet, go and
 			 * let validator do that */
 			return 0;
 		case sec_status_bogus:
@@ -484,13 +508,14 @@ answer_norec_from_cache(struct worker* worker, struct query_info* qinfo,
 				msg->rep, LDNS_RCODE_SERVFAIL, edns, repinfo, worker->scratchpad,
 				worker->env.now_tv))
 					return 0;
-			/* TODO store the reason for the bogus reply in cache
-			 * and implement in here instead of the hardcoded EDE */
-			if (worker->env.cfg->ede) {
-				EDNS_OPT_LIST_APPEND_EDE(&edns->opt_list_out,
-					worker->scratchpad, LDNS_EDE_DNSSEC_BOGUS, "");
+			/* Attach the cached EDE (RFC8914) */
+			if(worker->env.cfg->ede &&
+				msg->rep->reason_bogus != LDNS_EDE_NONE) {
+				edns_opt_list_append_ede(&edns->opt_list_out,
+					worker->scratchpad, msg->rep->reason_bogus,
+					msg->rep->reason_bogus_str);
 			}
-			error_encode(repinfo->c->buffer, LDNS_RCODE_SERVFAIL, 
+			error_encode(repinfo->c->buffer, LDNS_RCODE_SERVFAIL,
 				&msg->qinfo, id, flags, edns);
 			if(worker->stats.extended) {
 				worker->stats.ans_bogus++;
@@ -522,6 +547,16 @@ answer_norec_from_cache(struct worker* worker, struct query_info* qinfo,
 		worker->env.now_tv))
 			return 0;
 	msg->rep->flags |= BIT_QR|BIT_RA;
+	/* Attach the cached EDE (RFC8914) if CD bit is set and the answer is
+	 * bogus. */
+	if(worker->env.cfg->ede && has_cd_bit &&
+		(check_delegation_secure(msg->rep) == sec_status_bogus ||
+		check_delegation_secure(msg->rep) == sec_status_secure_sentinel_fail) &&
+		msg->rep->reason_bogus != LDNS_EDE_NONE) {
+		edns_opt_list_append_ede(&edns->opt_list_out,
+			worker->scratchpad, msg->rep->reason_bogus,
+			msg->rep->reason_bogus_str);
+	}
 	if(!reply_info_answer_encode(&msg->qinfo, msg->rep, id, flags,
 		repinfo->c->buffer, 0, 1, worker->scratchpad,
 		udpsize, edns, (int)(edns->bits & EDNS_DO), secure)) {
@@ -529,7 +564,7 @@ answer_norec_from_cache(struct worker* worker, struct query_info* qinfo,
 			LDNS_RCODE_SERVFAIL, edns, repinfo, worker->scratchpad,
 			worker->env.now_tv))
 				edns->opt_list_inplace_cb_out = NULL;
-		error_encode(repinfo->c->buffer, LDNS_RCODE_SERVFAIL, 
+		error_encode(repinfo->c->buffer, LDNS_RCODE_SERVFAIL,
 			&msg->qinfo, id, flags, edns);
 	}
 	if(worker->stats.extended) {
@@ -565,9 +600,10 @@ apply_respip_action(struct worker* worker, const struct query_info* qinfo,
 
 	/* xxx_deny actions mean dropping the reply, unless the original reply
 	 * was redirected to response-ip data. */
-	if((actinfo.action == respip_deny ||
+	if(actinfo.action == respip_always_deny ||
+		((actinfo.action == respip_deny ||
 		actinfo.action == respip_inform_deny) &&
-		*encode_repp == rep)
+		*encode_repp == rep))
 		*encode_repp = NULL;
 
 	/* If address info is returned, it means the action should be an
@@ -611,7 +647,8 @@ answer_from_cache(struct worker* worker, struct query_info* qinfo,
 	uint16_t udpsize = edns->udp_size;
 	struct reply_info* encode_rep = rep;
 	struct reply_info* partial_rep = *partial_repp;
-	int must_validate = (!(flags&BIT_CD) || worker->env.cfg->ignore_cd)
+	int has_cd_bit = (flags&BIT_CD);
+	int must_validate = (!has_cd_bit || worker->env.cfg->ignore_cd)
 		&& worker->env.need_to_validate;
 	*partial_repp = NULL;  /* avoid accidental further pass */
 
@@ -669,11 +706,11 @@ answer_from_cache(struct worker* worker, struct query_info* qinfo,
 			LDNS_RCODE_SERVFAIL, edns, repinfo, worker->scratchpad,
 			worker->env.now_tv))
 			goto bail_out;
-		/* TODO store the reason for the bogus reply in cache
-		 * and implement in here instead of the hardcoded EDE */
-		if (worker->env.cfg->ede) {
-			EDNS_OPT_LIST_APPEND_EDE(&edns->opt_list_out,
-				worker->scratchpad, LDNS_EDE_DNSSEC_BOGUS, "");
+		/* Attach the cached EDE (RFC8914) */
+		if(worker->env.cfg->ede && rep->reason_bogus != LDNS_EDE_NONE) {
+			edns_opt_list_append_ede(&edns->opt_list_out,
+					worker->scratchpad, rep->reason_bogus,
+					rep->reason_bogus_str);
 		}
 		error_encode(repinfo->c->buffer, LDNS_RCODE_SERVFAIL,
 			qinfo, id, flags, edns);
@@ -705,10 +742,6 @@ answer_from_cache(struct worker* worker, struct query_info* qinfo,
 	edns->udp_size = EDNS_ADVERTISED_SIZE;
 	edns->ext_rcode = 0;
 	edns->bits &= EDNS_DO;
-	if(!inplace_cb_reply_cache_call(&worker->env, qinfo, NULL, rep,
-		(int)(flags&LDNS_RCODE_MASK), edns, repinfo, worker->scratchpad,
-		worker->env.now_tv))
-		goto bail_out;
 	*alias_rrset = NULL; /* avoid confusion if caller set it to non-NULL */
 	if((worker->daemon->use_response_ip || worker->daemon->use_rpz) &&
 		!partial_rep && !apply_respip_action(worker, qinfo, cinfo, rep,
@@ -738,11 +771,24 @@ answer_from_cache(struct worker* worker, struct query_info* qinfo,
 				goto bail_out;
 		}
 	} else {
-		if (*is_expired_answer == 1 &&
+		if(*is_expired_answer == 1 &&
 			worker->env.cfg->ede_serve_expired && worker->env.cfg->ede) {
 			EDNS_OPT_LIST_APPEND_EDE(&edns->opt_list_out,
 				worker->scratchpad, LDNS_EDE_STALE_ANSWER, "");
 		}
+		/* Attach the cached EDE (RFC8914) if CD bit is set and the
+		 * answer is bogus. */
+		if(*is_secure_answer == 0 &&
+			worker->env.cfg->ede && has_cd_bit &&
+			encode_rep->reason_bogus != LDNS_EDE_NONE) {
+			edns_opt_list_append_ede(&edns->opt_list_out,
+				worker->scratchpad, encode_rep->reason_bogus,
+				encode_rep->reason_bogus_str);
+		}
+		if(!inplace_cb_reply_cache_call(&worker->env, qinfo, NULL, encode_rep,
+			(int)(flags&LDNS_RCODE_MASK), edns, repinfo, worker->scratchpad,
+			worker->env.now_tv))
+			goto bail_out;
 		if(!reply_info_answer_encode(qinfo, encode_rep, id, flags,
 			repinfo->c->buffer, timenow, 1, worker->scratchpad,
 			udpsize, edns, (int)(edns->bits & EDNS_DO),
@@ -763,7 +809,7 @@ answer_from_cache(struct worker* worker, struct query_info* qinfo,
 	return 1;
 
 bail_out:
-	rrset_array_unlock_touch(worker->env.rrset_cache, 
+	rrset_array_unlock_touch(worker->env.rrset_cache,
 		worker->scratchpad, rep->ref, rep->rrset_count);
 	return 0;
 }
@@ -793,7 +839,8 @@ reply_and_prefetch(struct worker* worker, struct query_info* qinfo,
 	if(modstack_find(&worker->env.mesh->mods, "subnetcache") != -1
 		&& worker->env.unique_mesh) {
 		mesh_new_prefetch(worker->env.mesh, qinfo, flags, leeway +
-			PREFETCH_EXPIRY_ADD, rpz_passthru, repinfo, opt_list);
+			PREFETCH_EXPIRY_ADD, rpz_passthru,
+			&repinfo->client_addr, opt_list);
 		return;
 	}
 #endif
@@ -947,12 +994,12 @@ answer_chaos(struct worker* w, struct query_info* qinfo,
 	struct config_file* cfg = w->env.cfg;
 	if(qinfo->qtype != LDNS_RR_TYPE_ANY && qinfo->qtype != LDNS_RR_TYPE_TXT)
 		return 0;
-	if(query_dname_compare(qinfo->qname, 
+	if(query_dname_compare(qinfo->qname,
 		(uint8_t*)"\002id\006server") == 0 ||
-		query_dname_compare(qinfo->qname, 
+		query_dname_compare(qinfo->qname,
 		(uint8_t*)"\010hostname\004bind") == 0)
 	{
-		if(cfg->hide_identity) 
+		if(cfg->hide_identity)
 			return 0;
 		if(cfg->identity==NULL || cfg->identity[0]==0) {
 			char buf[MAXHOSTNAMELEN+1];
@@ -967,12 +1014,12 @@ answer_chaos(struct worker* w, struct query_info* qinfo,
 		else 	chaos_replyonestr(pkt, cfg->identity, edns, w, repinfo);
 		return 1;
 	}
-	if(query_dname_compare(qinfo->qname, 
+	if(query_dname_compare(qinfo->qname,
 		(uint8_t*)"\007version\006server") == 0 ||
-		query_dname_compare(qinfo->qname, 
+		query_dname_compare(qinfo->qname,
 		(uint8_t*)"\007version\004bind") == 0)
 	{
-		if(cfg->hide_version) 
+		if(cfg->hide_version)
 			return 0;
 		if(cfg->version==NULL || cfg->version[0]==0)
 			chaos_replyonestr(pkt, PACKAGE_STRING, edns, w, repinfo);
@@ -1056,7 +1103,8 @@ static int
 deny_refuse(struct comm_point* c, enum acl_access acl,
 	enum acl_access deny, enum acl_access refuse,
 	struct worker* worker, struct comm_reply* repinfo,
-	struct acl_addr* acladdr, int ede)
+	struct acl_addr* acladdr, int ede,
+	struct check_request_result* check_result)
 {
 	if(acl == deny) {
 		if(verbosity >= VERB_ALGO) {
@@ -1079,9 +1127,16 @@ deny_refuse(struct comm_point* c, enum acl_access acl,
 
 		if(worker->stats.extended)
 			worker->stats.unwanted_queries++;
-		if(worker_check_request(c->buffer, worker) == -1) {
+		worker_check_request(c->buffer, worker, check_result);
+		if(check_result->value != 0) {
+			if(check_result->value != -1) {
+				LDNS_QR_SET(sldns_buffer_begin(c->buffer));
+				LDNS_RCODE_SET(sldns_buffer_begin(c->buffer),
+					check_result->value);
+				return 1;
+			}
 			comm_point_drop_reply(repinfo);
-			return 0; /* discard this */
+			return 0;
 		}
 		/* worker_check_request() above guarantees that the buffer contains at
 		 * least a header and that qdcount == 1
@@ -1131,7 +1186,7 @@ deny_refuse(struct comm_point* c, enum acl_access acl,
 			return 1;
 		}
 		LDNS_QR_SET(sldns_buffer_begin(c->buffer));
-		LDNS_RCODE_SET(sldns_buffer_begin(c->buffer), 
+		LDNS_RCODE_SET(sldns_buffer_begin(c->buffer),
 			LDNS_RCODE_REFUSED);
 
 		sldns_buffer_skip(c->buffer, (ssize_t)sizeof(uint16_t)); /* skip qtype */
@@ -1146,7 +1201,7 @@ deny_refuse(struct comm_point* c, enum acl_access acl,
 		/* Skip through the RR records */
 		if(LDNS_ANCOUNT(sldns_buffer_begin(c->buffer)) != 0 ||
 			LDNS_NSCOUNT(sldns_buffer_begin(c->buffer)) != 0) {
-			if(!skip_pkt_rrs(c->buffer, 
+			if(!skip_pkt_rrs(c->buffer,
 				((int)LDNS_ANCOUNT(sldns_buffer_begin(c->buffer)))+
 				((int)LDNS_NSCOUNT(sldns_buffer_begin(c->buffer))))) {
 				LDNS_RCODE_SET(sldns_buffer_begin(c->buffer),
@@ -1235,7 +1290,8 @@ deny_refuse(struct comm_point* c, enum acl_access acl,
 static int
 deny_refuse_all(struct comm_point* c, enum acl_access* acl,
 	struct worker* worker, struct comm_reply* repinfo,
-	struct acl_addr** acladdr, int ede, int check_proxy)
+	struct acl_addr** acladdr, int ede, int check_proxy,
+	struct check_request_result* check_result)
 {
 	if(check_proxy) {
 		*acladdr = acl_addr_lookup(worker->daemon->acl,
@@ -1250,16 +1306,51 @@ deny_refuse_all(struct comm_point* c, enum acl_access* acl,
 	}
 	*acl = acl_get_control(*acladdr);
 	return deny_refuse(c, *acl, acl_deny, acl_refuse, worker, repinfo,
-		*acladdr, ede);
+		*acladdr, ede, check_result);
 }
 
 static int
 deny_refuse_non_local(struct comm_point* c, enum acl_access acl,
 	struct worker* worker, struct comm_reply* repinfo,
-	struct acl_addr* acladdr, int ede)
+	struct acl_addr* acladdr, int ede,
+	struct check_request_result* check_result)
 {
 	return deny_refuse(c, acl, acl_deny_non_local, acl_refuse_non_local,
-		worker, repinfo, acladdr, ede);
+		worker, repinfo, acladdr, ede, check_result);
+}
+
+/* Returns 1 if the ip rate limit check can happen before EDNS parsing,
+ * else 0 */
+static int
+pre_edns_ip_ratelimit_check(enum acl_access acl)
+{
+	if(acl == acl_allow_cookie) return 0;
+	return 1;
+}
+
+/* Check if the query is blocked by source IP rate limiting.
+ * Returns 1 if it passes the check, 0 otherwise. */
+static int
+check_ip_ratelimit(struct worker* worker, struct sockaddr_storage* addr,
+	socklen_t addrlen, int has_cookie, sldns_buffer* pkt)
+{
+	if(!infra_ip_ratelimit_inc(worker->env.infra_cache, addr, addrlen,
+			*worker->env.now, has_cookie,
+			worker->env.cfg->ip_ratelimit_backoff, pkt)) {
+		/* See if we can pass through with slip factor */
+		if(!has_cookie && worker->env.cfg->ip_ratelimit_factor != 0 &&
+			ub_random_max(worker->env.rnd,
+			worker->env.cfg->ip_ratelimit_factor) == 0) {
+			char addrbuf[128];
+			addr_to_str(addr, addrlen, addrbuf, sizeof(addrbuf));
+			verbose(VERB_QUERY, "ip_ratelimit allowed through for "
+				"ip address %s because of slip in "
+				"ip_ratelimit_factor", addrbuf);
+			return 1;
+		}
+		return 0;
+	}
+	return 1;
 }
 
 int
@@ -1275,11 +1366,13 @@ worker_handle_request(struct comm_point* c, void* arg, int error,
 	struct edns_option* original_edns_list = NULL;
 	enum acl_access acl;
 	struct acl_addr* acladdr;
+	int pre_edns_ip_ratelimit = 1;
 	int rc = 0;
 	int need_drop = 0;
 	int is_expired_answer = 0;
 	int is_secure_answer = 0;
 	int rpz_passthru = 0;
+	long long wait_queue_time = 0;
 	/* We might have to chase a CNAME chain internally, in which case
 	 * we'll have up to two replies and combine them to build a complete
 	 * answer.  These variables control this case. */
@@ -1288,6 +1381,8 @@ worker_handle_request(struct comm_point* c, void* arg, int error,
 	struct query_info* lookup_qinfo = &qinfo;
 	struct query_info qinfo_tmp; /* placeholder for lookup_qinfo */
 	struct respip_client_info* cinfo = NULL, cinfo_tmp;
+	struct timeval wait_time;
+	struct check_request_result check_result = {0,0};
 	memset(&qinfo, 0, sizeof(qinfo));
 
 	if((error != NETEVENT_NOERROR && error != NETEVENT_DONE)|| !repinfo) {
@@ -1295,6 +1390,20 @@ worker_handle_request(struct comm_point* c, void* arg, int error,
 		verbose(VERB_ALGO, "handle request called with err=%d", error);
 		return 0;
 	}
+
+	if (worker->env.cfg->sock_queue_timeout && timeval_isset(&c->recv_tv)) {
+		timeval_subtract(&wait_time, worker->env.now_tv, &c->recv_tv);
+		wait_queue_time = wait_time.tv_sec * 1000000 +  wait_time.tv_usec;
+		if (worker->stats.max_query_time_us < wait_queue_time)
+			worker->stats.max_query_time_us = wait_queue_time;
+		if(wait_queue_time >
+			(long long)(worker->env.cfg->sock_queue_timeout * 1000000)) {
+			/* count and drop queries that were sitting in the socket queue too long */
+			worker->stats.num_queries_timed_out++;
+			return 0;
+		}
+	}
+
 #ifdef USE_DNSCRYPT
 	repinfo->max_udp_size = worker->daemon->cfg->max_udp_size;
 	if(!dnsc_handle_curved_request(worker->daemon->dnscenv, repinfo)) {
@@ -1304,7 +1413,8 @@ worker_handle_request(struct comm_point* c, void* arg, int error,
 	if(c->dnscrypt && !repinfo->is_dnscrypted) {
 		char buf[LDNS_MAX_DOMAINLEN+1];
 		/* Check if this is unencrypted and asking for certs */
-		if(worker_check_request(c->buffer, worker) != 0) {
+		worker_check_request(c->buffer, worker, &check_result);
+		if(check_result.value != 0) {
 			verbose(VERB_ALGO,
 				"dnscrypt: worker check request: bad query.");
 			log_addr(VERB_CLIENT,"from",&repinfo->client_addr,
@@ -1346,31 +1456,34 @@ worker_handle_request(struct comm_point* c, void* arg, int error,
 	if(worker->dtenv.log_client_query_messages) {
 		log_addr(VERB_ALGO, "request from client", &repinfo->client_addr, repinfo->client_addrlen);
 		log_addr(VERB_ALGO, "to local addr", (void*)repinfo->c->socket->addr->ai_addr, repinfo->c->socket->addr->ai_addrlen);
-		dt_msg_send_client_query(&worker->dtenv, &repinfo->client_addr, (void*)repinfo->c->socket->addr->ai_addr, c->type, c->buffer);
+		dt_msg_send_client_query(&worker->dtenv, &repinfo->client_addr, (void*)repinfo->c->socket->addr->ai_addr, c->type, c->buffer,
+		((worker->env.cfg->sock_queue_timeout && timeval_isset(&c->recv_tv))?&c->recv_tv:NULL));
 	}
 #endif
 	/* Check deny/refuse ACLs */
 	if(repinfo->is_proxied) {
 		if((ret=deny_refuse_all(c, &acl, worker, repinfo, &acladdr,
-			worker->env.cfg->ede, 1)) != -1) {
+			worker->env.cfg->ede, 1, &check_result)) != -1) {
 			if(ret == 1)
 				goto send_reply;
 			return ret;
 		}
 	}
 	if((ret=deny_refuse_all(c, &acl, worker, repinfo, &acladdr,
-		worker->env.cfg->ede, 0)) != -1) {
+		worker->env.cfg->ede, 0, &check_result)) != -1) {
 		if(ret == 1)
 			goto send_reply;
 		return ret;
 	}
 
-	if((ret=worker_check_request(c->buffer, worker)) != 0) {
+	worker_check_request(c->buffer, worker, &check_result);
+	if(check_result.value != 0) {
 		verbose(VERB_ALGO, "worker check request: bad query.");
 		log_addr(VERB_CLIENT,"from",&repinfo->client_addr, repinfo->client_addrlen);
-		if(ret != -1) {
+		if(check_result.value != -1) {
 			LDNS_QR_SET(sldns_buffer_begin(c->buffer));
-			LDNS_RCODE_SET(sldns_buffer_begin(c->buffer), ret);
+			LDNS_RCODE_SET(sldns_buffer_begin(c->buffer),
+				check_result.value);
 			return 1;
 		}
 		comm_point_drop_reply(repinfo);
@@ -1378,33 +1491,21 @@ worker_handle_request(struct comm_point* c, void* arg, int error,
 	}
 
 	worker->stats.num_queries++;
-
-	/* check if this query should be dropped based on source ip rate limiting
-	 * NOTE: we always check the repinfo->client_address. IP ratelimiting is
-	 *       implicitly disabled for proxies. */
-	if(!infra_ip_ratelimit_inc(worker->env.infra_cache,
-			&repinfo->client_addr, repinfo->client_addrlen,
-			*worker->env.now,
-			worker->env.cfg->ip_ratelimit_backoff, c->buffer)) {
-		/* See if we are passed through with slip factor */
-		if(worker->env.cfg->ip_ratelimit_factor != 0 &&
-			ub_random_max(worker->env.rnd,
-			worker->env.cfg->ip_ratelimit_factor) == 0) {
-			char addrbuf[128];
-			addr_to_str(&repinfo->client_addr,
-				repinfo->client_addrlen, addrbuf,
-				sizeof(addrbuf));
-			verbose(VERB_QUERY, "ip_ratelimit allowed through for "
-				"ip address %s because of slip in "
-				"ip_ratelimit_factor", addrbuf);
-		} else {
+	pre_edns_ip_ratelimit = pre_edns_ip_ratelimit_check(acl);
+
+	/* If the IP rate limiting check needs extra EDNS information (e.g.,
+	 * DNS Cookies) postpone the check until after EDNS is parsed. */
+	if(pre_edns_ip_ratelimit) {
+		/* NOTE: we always check the repinfo->client_address.
+		 *       IP ratelimiting is implicitly disabled for proxies. */
+		if(!check_ip_ratelimit(worker, &repinfo->client_addr,
+			repinfo->client_addrlen, 0, c->buffer)) {
 			worker->stats.num_queries_ip_ratelimited++;
 			comm_point_drop_reply(repinfo);
 			return 0;
 		}
 	}
 
-	/* see if query is in the cache */
 	if(!query_info_parse(&qinfo, c->buffer)) {
 		verbose(VERB_ALGO, "worker parse request: formerror.");
 		log_addr(VERB_CLIENT, "from", &repinfo->client_addr,
@@ -1416,7 +1517,7 @@ worker_handle_request(struct comm_point* c, void* arg, int error,
 		}
 		sldns_buffer_rewind(c->buffer);
 		LDNS_QR_SET(sldns_buffer_begin(c->buffer));
-		LDNS_RCODE_SET(sldns_buffer_begin(c->buffer), 
+		LDNS_RCODE_SET(sldns_buffer_begin(c->buffer),
 			LDNS_RCODE_FORMERR);
 		goto send_reply;
 	}
@@ -1425,21 +1526,21 @@ worker_handle_request(struct comm_point* c, void* arg, int error,
 		addr_to_str(&repinfo->client_addr, repinfo->client_addrlen, ip, sizeof(ip));
 		log_query_in(ip, qinfo.qname, qinfo.qtype, qinfo.qclass);
 	}
-	if(qinfo.qtype == LDNS_RR_TYPE_AXFR || 
+	if(qinfo.qtype == LDNS_RR_TYPE_AXFR ||
 		qinfo.qtype == LDNS_RR_TYPE_IXFR) {
 		verbose(VERB_ALGO, "worker request: refused zone transfer.");
 		log_addr(VERB_CLIENT, "from", &repinfo->client_addr,
 			repinfo->client_addrlen);
 		sldns_buffer_rewind(c->buffer);
 		LDNS_QR_SET(sldns_buffer_begin(c->buffer));
-		LDNS_RCODE_SET(sldns_buffer_begin(c->buffer), 
+		LDNS_RCODE_SET(sldns_buffer_begin(c->buffer),
 			LDNS_RCODE_REFUSED);
 		if(worker->stats.extended) {
 			worker->stats.qtype[qinfo.qtype]++;
 		}
 		goto send_reply;
 	}
-	if(qinfo.qtype == LDNS_RR_TYPE_OPT || 
+	if(qinfo.qtype == LDNS_RR_TYPE_OPT ||
 		qinfo.qtype == LDNS_RR_TYPE_TSIG ||
 		qinfo.qtype == LDNS_RR_TYPE_TKEY ||
 		qinfo.qtype == LDNS_RR_TYPE_MAILA ||
@@ -1454,23 +1555,23 @@ worker_handle_request(struct comm_point* c, void* arg, int error,
 		}
 		sldns_buffer_rewind(c->buffer);
 		LDNS_QR_SET(sldns_buffer_begin(c->buffer));
-		LDNS_RCODE_SET(sldns_buffer_begin(c->buffer), 
+		LDNS_RCODE_SET(sldns_buffer_begin(c->buffer),
 			LDNS_RCODE_FORMERR);
 		if(worker->stats.extended) {
 			worker->stats.qtype[qinfo.qtype]++;
 		}
 		goto send_reply;
 	}
-	if((ret=parse_edns_from_query_pkt(c->buffer, &edns, worker->env.cfg, c,
-					worker->scratchpad)) != 0) {
+	if((ret=parse_edns_from_query_pkt(
+			c->buffer, &edns, worker->env.cfg, c, repinfo,
+			(worker->env.now ? *worker->env.now : time(NULL)),
+			worker->scratchpad)) != 0) {
 		struct edns_data reply_edns;
 		verbose(VERB_ALGO, "worker parse edns: formerror.");
 		log_addr(VERB_CLIENT, "from", &repinfo->client_addr,
 			repinfo->client_addrlen);
 		memset(&reply_edns, 0, sizeof(reply_edns));
 		reply_edns.edns_present = 1;
-		reply_edns.udp_size = EDNS_ADVERTISED_SIZE;
-		LDNS_RCODE_SET(sldns_buffer_begin(c->buffer), ret);
 		error_encode(c->buffer, ret, &qinfo,
 			*(uint16_t*)(void *)sldns_buffer_begin(c->buffer),
 			sldns_buffer_read_u16_at(c->buffer, 2), &reply_edns);
@@ -1479,23 +1580,15 @@ worker_handle_request(struct comm_point* c, void* arg, int error,
 	}
 	if(edns.edns_present) {
 		if(edns.edns_version != 0) {
-			edns.ext_rcode = (uint8_t)(EDNS_RCODE_BADVERS>>4);
-			edns.edns_version = EDNS_ADVERTISED_VERSION;
-			edns.udp_size = EDNS_ADVERTISED_SIZE;
-			edns.bits &= EDNS_DO;
 			edns.opt_list_in = NULL;
 			edns.opt_list_out = NULL;
 			edns.opt_list_inplace_cb_out = NULL;
-			edns.padding_block_size = 0;
 			verbose(VERB_ALGO, "query with bad edns version.");
 			log_addr(VERB_CLIENT, "from", &repinfo->client_addr,
 				repinfo->client_addrlen);
-			error_encode(c->buffer, EDNS_RCODE_BADVERS&0xf, &qinfo,
+			extended_error_encode(c->buffer, EDNS_RCODE_BADVERS, &qinfo,
 				*(uint16_t*)(void *)sldns_buffer_begin(c->buffer),
-				sldns_buffer_read_u16_at(c->buffer, 2), NULL);
-			if(sldns_buffer_capacity(c->buffer) >=
-			   sldns_buffer_limit(c->buffer)+calc_edns_field_size(&edns))
-				attach_edns_record(c->buffer, &edns);
+				sldns_buffer_read_u16_at(c->buffer, 2), 0, &edns);
 			regional_free_all(worker->scratchpad);
 			goto send_reply;
 		}
@@ -1508,6 +1601,62 @@ worker_handle_request(struct comm_point* c, void* arg, int error,
 			edns.udp_size = NORMAL_UDP_SIZE;
 		}
 	}
+
+	/* Get stats for cookies */
+	server_stats_downstream_cookie(&worker->stats, &edns);
+
+	/* If the IP rate limiting check was postponed, check now. */
+	if(!pre_edns_ip_ratelimit) {
+		/* NOTE: we always check the repinfo->client_address.
+		 *       IP ratelimiting is implicitly disabled for proxies. */
+		if(!check_ip_ratelimit(worker, &repinfo->client_addr,
+			repinfo->client_addrlen, edns.cookie_valid,
+			c->buffer)) {
+			worker->stats.num_queries_ip_ratelimited++;
+			comm_point_drop_reply(repinfo);
+			return 0;
+		}
+	}
+
+	/* "if, else if" sequence below deals with downstream DNS Cookies */
+	if(acl != acl_allow_cookie)
+		; /* pass; No cookie downstream processing whatsoever */
+
+	else if(edns.cookie_valid)
+		; /* pass; Valid cookie is good! */
+
+	else if(c->type != comm_udp)
+		; /* pass; Stateful transport */
+
+	else if(edns.cookie_present) {
+		/* Cookie present, but not valid: Cookie was bad! */
+		extended_error_encode(c->buffer,
+			LDNS_EXT_RCODE_BADCOOKIE, &qinfo,
+			*(uint16_t*)(void *)
+			sldns_buffer_begin(c->buffer),
+			sldns_buffer_read_u16_at(c->buffer, 2),
+			0, &edns);
+		regional_free_all(worker->scratchpad);
+		goto send_reply;
+	} else {
+		/* Cookie required, but no cookie present on UDP */
+		verbose(VERB_ALGO, "worker request: "
+			"need cookie or stateful transport");
+		log_addr(VERB_ALGO, "from",&repinfo->remote_addr
+		                          , repinfo->remote_addrlen);
+		EDNS_OPT_LIST_APPEND_EDE(&edns.opt_list_out,
+			worker->scratchpad, LDNS_EDE_OTHER,
+			"DNS Cookie needed for UDP replies");
+		error_encode(c->buffer,
+			(LDNS_RCODE_REFUSED|BIT_TC), &qinfo,
+			*(uint16_t*)(void *)
+			sldns_buffer_begin(c->buffer),
+			sldns_buffer_read_u16_at(c->buffer, 2),
+			&edns);
+		regional_free_all(worker->scratchpad);
+		goto send_reply;
+	}
+
 	if(edns.udp_size > worker->daemon->cfg->max_udp_size &&
 		c->type == comm_udp) {
 		verbose(VERB_QUERY,
@@ -1523,10 +1672,10 @@ worker_handle_request(struct comm_point* c, void* arg, int error,
 			repinfo->client_addrlen);
 		LDNS_QR_SET(sldns_buffer_begin(c->buffer));
 		LDNS_TC_SET(sldns_buffer_begin(c->buffer));
-		LDNS_RCODE_SET(sldns_buffer_begin(c->buffer), 
+		LDNS_RCODE_SET(sldns_buffer_begin(c->buffer),
 			LDNS_RCODE_SERVFAIL);
 		sldns_buffer_set_position(c->buffer, LDNS_HEADER_SIZE);
-		sldns_buffer_write_at(c->buffer, 4, 
+		sldns_buffer_write_at(c->buffer, 4,
 			(uint8_t*)"\0\0\0\0\0\0\0\0", 8);
 		sldns_buffer_flip(c->buffer);
 		regional_free_all(worker->scratchpad);
@@ -1593,7 +1742,7 @@ worker_handle_request(struct comm_point* c, void* arg, int error,
 	/* We've looked in our local zones. If the answer isn't there, we
 	 * might need to bail out based on ACLs now. */
 	if((ret=deny_refuse_non_local(c, acl, worker, repinfo, acladdr,
-		worker->env.cfg->ede)) != -1)
+		worker->env.cfg->ede, &check_result)) != -1)
 	{
 		regional_free_all(worker->scratchpad);
 		if(ret == 1)
@@ -1612,7 +1761,7 @@ worker_handle_request(struct comm_point* c, void* arg, int error,
 	 * ACLs allow the snooping. */
 	if(!(LDNS_RD_WIRE(sldns_buffer_begin(c->buffer))) &&
 		acl != acl_allow_snoop ) {
-		if (worker->env.cfg->ede) {
+		if(worker->env.cfg->ede) {
 			EDNS_OPT_LIST_APPEND_EDE(&edns.opt_list_out,
 				worker->scratchpad, LDNS_EDE_NOT_AUTHORITATIVE, "");
 		}
@@ -1745,8 +1894,8 @@ lookup_cache:
 
 		if(!LDNS_RD_WIRE(sldns_buffer_begin(c->buffer))) {
 			if(answer_norec_from_cache(worker, &qinfo,
-				*(uint16_t*)(void *)sldns_buffer_begin(c->buffer), 
-				sldns_buffer_read_u16_at(c->buffer, 2), repinfo, 
+				*(uint16_t*)(void *)sldns_buffer_begin(c->buffer),
+				sldns_buffer_read_u16_at(c->buffer, 2), repinfo,
 				&edns)) {
 				regional_free_all(worker->scratchpad);
 				goto send_reply;
@@ -1825,10 +1974,10 @@ send_reply_rc:
 	return rc;
 }
 
-void 
+void
 worker_sighandler(int sig, void* arg)
 {
-	/* note that log, print, syscalls here give race conditions. 
+	/* note that log, print, syscalls here give race conditions.
 	 * And cause hangups if the log-lock is held by the application. */
 	struct worker* worker = (struct worker*)arg;
 	switch(sig) {
@@ -1903,13 +2052,13 @@ void worker_probe_timer_cb(void* arg)
 		comm_timer_set(worker->env.probe_timer, &tv);
 }
 
-struct worker* 
+struct worker*
 worker_create(struct daemon* daemon, int id, int* ports, int n)
 {
 	unsigned int seed;
-	struct worker* worker = (struct worker*)calloc(1, 
+	struct worker* worker = (struct worker*)calloc(1,
 		sizeof(struct worker));
-	if(!worker) 
+	if(!worker)
 		return NULL;
 	worker->numports = n;
 	worker->ports = (int*)memdup(ports, sizeof(int)*n);
@@ -1937,7 +2086,7 @@ worker_create(struct daemon* daemon, int id, int* ports, int n)
 }
 
 int
-worker_init(struct worker* worker, struct config_file *cfg, 
+worker_init(struct worker* worker, struct config_file *cfg,
 	struct listen_port* ports, int do_sigs)
 {
 #ifdef USE_DNSTAP
@@ -1970,9 +2119,9 @@ worker_init(struct worker* worker, struct config_file *cfg,
 #endif
 		ub_thread_sig_unblock(SIGTERM);
 #ifndef LIBEVENT_SIGNAL_PROBLEM
-		worker->comsig = comm_signal_create(worker->base, 
+		worker->comsig = comm_signal_create(worker->base,
 			worker_sighandler, worker);
-		if(!worker->comsig 
+		if(!worker->comsig
 #ifdef SIGHUP
 			|| !comm_signal_bind(worker->comsig, SIGHUP)
 #endif
@@ -1989,7 +2138,7 @@ worker_init(struct worker* worker, struct config_file *cfg,
 			return 0;
 		}
 #endif /* LIBEVENT_SIGNAL_PROBLEM */
-		if(!daemon_remote_open_accept(worker->daemon->rc, 
+		if(!daemon_remote_open_accept(worker->daemon->rc,
 			worker->daemon->rc_ports, worker)) {
 			worker_delete(worker);
 			return 0;
@@ -2023,8 +2172,8 @@ worker_init(struct worker* worker, struct config_file *cfg,
 		return 0;
 	}
 	worker->back = outside_network_create(worker->base,
-		cfg->msg_buffer_size, (size_t)cfg->outgoing_num_ports, 
-		cfg->out_ifs, cfg->num_out_ifs, cfg->do_ip4, cfg->do_ip6, 
+		cfg->msg_buffer_size, (size_t)cfg->outgoing_num_ports,
+		cfg->out_ifs, cfg->num_out_ifs, cfg->do_ip4, cfg->do_ip6,
 		cfg->do_tcp?cfg->outgoing_num_tcp:0, cfg->ip_dscp,
 		worker->daemon->env->infra_cache, worker->rndstate,
 		cfg->use_caps_bits_for_id, worker->ports, worker->numports,
@@ -2049,13 +2198,13 @@ worker_init(struct worker* worker, struct config_file *cfg,
 		worker_delete(worker);
 		return 0;
 	}
-	worker->stat_timer = comm_timer_create(worker->base, 
+	worker->stat_timer = comm_timer_create(worker->base,
 		worker_stat_timer_cb, worker);
 	if(!worker->stat_timer) {
 		log_err("could not create statistics timer");
 	}
 
-	/* we use the msg_buffer_size as a good estimate for what the 
+	/* we use the msg_buffer_size as a good estimate for what the
 	 * user wants for memory usage sizes */
 	worker->scratchpad = regional_create_custom(cfg->msg_buffer_size);
 	if(!worker->scratchpad) {
@@ -2164,23 +2313,23 @@ worker_init(struct worker* worker, struct config_file *cfg,
 	worker_mem_report(worker, NULL);
 	/* if statistics enabled start timer */
 	if(worker->env.cfg->stat_interval > 0) {
-		verbose(VERB_ALGO, "set statistics interval %d secs", 
+		verbose(VERB_ALGO, "set statistics interval %d secs",
 			worker->env.cfg->stat_interval);
 		worker_restart_timer(worker);
 	}
 	return 1;
 }
 
-void 
+void
 worker_work(struct worker* worker)
 {
 	comm_base_dispatch(worker->base);
 }
 
-void 
+void
 worker_delete(struct worker* worker)
 {
-	if(!worker) 
+	if(!worker)
 		return;
 	if(worker->env.mesh && verbosity >= VERB_OPS) {
 		server_stats_log(&worker->stats, worker, worker->thread_num);
@@ -2232,7 +2381,7 @@ worker_send_query(struct query_info* qinfo, uint16_t flags, int dnssec,
 	struct worker* worker = q->env->worker;
 	struct outbound_entry* e = (struct outbound_entry*)regional_alloc(
 		q->region, sizeof(*e));
-	if(!e) 
+	if(!e)
 		return NULL;
 	e->qstate = q;
 	e->qsent = outnet_serviced_query(worker->back, qinfo, flags, dnssec,
@@ -2246,7 +2395,7 @@ worker_send_query(struct query_info* qinfo, uint16_t flags, int dnssec,
 	return e;
 }
 
-void 
+void
 worker_alloc_cleanup(void* arg)
 {
 	struct worker* worker = (struct worker*)arg;
@@ -2294,7 +2443,7 @@ struct outbound_entry* libworker_send_query(
 	return 0;
 }
 
-int libworker_handle_service_reply(struct comm_point* ATTR_UNUSED(c), 
+int libworker_handle_service_reply(struct comm_point* ATTR_UNUSED(c),
 	void* ATTR_UNUSED(arg), int ATTR_UNUSED(error),
         struct comm_reply* ATTR_UNUSED(reply_info))
 {
diff --git a/contrib/unbound/dns64/dns64.c b/contrib/unbound/dns64/dns64.c
index 4b98b609e2d3..1e31f51e831f 100644
--- a/contrib/unbound/dns64/dns64.c
+++ b/contrib/unbound/dns64/dns64.c
@@ -59,7 +59,7 @@
  ******************************************************************************/
 
 /**
- * This is the default DNS64 prefix that is used whent he dns64 module is listed
+ * This is the default DNS64 prefix that is used when the dns64 module is listed
  * in module-config but when the dns64-prefix variable is not present.
  */
 static const char DEFAULT_DNS64_PREFIX[] = "64:ff9b::/96";
@@ -841,7 +841,7 @@ dns64_adjust_a(int id, struct module_qstate* super, struct module_qstate* qstate
 	cp = construct_reply_info_base(super->region, rep->flags, rep->qdcount,
 		rep->ttl, rep->prefetch_ttl, rep->serve_expired_ttl,
 		rep->an_numrrsets, rep->ns_numrrsets, rep->ar_numrrsets,
-		rep->rrset_count, rep->security);
+		rep->rrset_count, rep->security, LDNS_EDE_NONE);
 	if(!cp)
 		return;
 
diff --git a/contrib/unbound/dnstap/dnstap.c b/contrib/unbound/dnstap/dnstap.c
index 5c0cde1d5588..d15eb9b004b2 100644
--- a/contrib/unbound/dnstap/dnstap.c
+++ b/contrib/unbound/dnstap/dnstap.c
@@ -388,12 +388,15 @@ dt_msg_send_client_query(struct dt_env *env,
 			 struct sockaddr_storage *qsock,
 			 struct sockaddr_storage *rsock,
 			 enum comm_point_type cptype,
-			 sldns_buffer *qmsg)
+			 sldns_buffer *qmsg,
+			 struct timeval* tstamp)
 {
 	struct dt_msg dm;
 	struct timeval qtime;
 
-	gettimeofday(&qtime, NULL);
+	if(tstamp)
+		memcpy(&qtime, tstamp, sizeof(qtime));
+	else 	gettimeofday(&qtime, NULL);
 
 	/* type */
 	dt_msg_init(env, &dm, DNSTAP__MESSAGE__TYPE__CLIENT_QUERY);
diff --git a/contrib/unbound/dnstap/dnstap.h b/contrib/unbound/dnstap/dnstap.h
index 449fae727eac..169bdc2c6815 100644
--- a/contrib/unbound/dnstap/dnstap.h
+++ b/contrib/unbound/dnstap/dnstap.h
@@ -126,13 +126,15 @@ dt_delete(struct dt_env *env);
  * @param rsock: local (service) address/port.
  * @param cptype: comm_udp or comm_tcp.
  * @param qmsg: query message.
+ * @param tstamp: timestamp or NULL if none provided.
  */
 void
 dt_msg_send_client_query(struct dt_env *env,
 			 struct sockaddr_storage *qsock,
 			 struct sockaddr_storage *rsock,
 			 enum comm_point_type cptype,
-			 struct sldns_buffer *qmsg);
+			 struct sldns_buffer *qmsg,
+			 struct timeval* tstamp);
 
 /**
  * Create and send a new dnstap "Message" event of type CLIENT_RESPONSE.
diff --git a/contrib/unbound/dnstap/unbound-dnstap-socket.c b/contrib/unbound/dnstap/unbound-dnstap-socket.c
index 3bf889463eac..d172a6744a07 100644
--- a/contrib/unbound/dnstap/unbound-dnstap-socket.c
+++ b/contrib/unbound/dnstap/unbound-dnstap-socket.c
@@ -61,6 +61,7 @@
 #include "services/listen_dnsport.h"
 #include "sldns/sbuffer.h"
 #include "sldns/wire2str.h"
+#include "sldns/pkthdr.h"
 #ifdef USE_DNSTAP
 #include <protobuf-c/protobuf-c.h>
 #include "dnstap/dnstap.pb-c.h"
@@ -448,6 +449,7 @@ static char* q_of_msg(ProtobufCBinaryData message)
 	char buf[300];
 	/* header, name, type, class minimum to get the query tuple */
 	if(message.len < 12 + 1 + 4 + 4) return NULL;
+	if(LDNS_QDCOUNT(message.data) < 1) return NULL;
 	if(sldns_wire2str_rrquestion_buf(message.data+12, message.len-12,
 		buf, sizeof(buf)) != 0) {
 		/* remove trailing newline, tabs to spaces */
@@ -502,7 +504,7 @@ static char* tv_to_str(protobuf_c_boolean has_time_sec, uint64_t time_sec,
 	time_t time_t_sec;
 	memset(&tv, 0, sizeof(tv));
 	if(has_time_sec) tv.tv_sec = time_sec;
-	if(has_time_nsec) tv.tv_usec = time_nsec;
+	if(has_time_nsec) tv.tv_usec = time_nsec/1000;
 
 	buf[0]=0;
 	time_t_sec = tv.tv_sec;
@@ -789,7 +791,7 @@ static int reply_with_accept(struct tap_data* data)
 
 /** reply with FINISH control frame to bidirectional client,
  * returns 0 on error */
-static int reply_with_finish(int fd)
+static int reply_with_finish(struct tap_data* data)
 {
 #ifdef USE_DNSTAP
 	size_t len = 0;
@@ -799,21 +801,34 @@ static int reply_with_finish(int fd)
 		return 0;
 	}
 
-	fd_set_block(fd);
-	if(send(fd, finishframe, len, 0) == -1) {
-		log_err("send failed: %s", sock_strerror(errno));
-		fd_set_nonblock(fd);
-		free(finishframe);
-		return 0;
+	fd_set_block(data->fd);
+	if(data->ssl) {
+		int r;
+		if((r=SSL_write(data->ssl, finishframe, len)) <= 0) {
+			if(SSL_get_error(data->ssl, r) == SSL_ERROR_ZERO_RETURN)
+				log_err("SSL_write, peer closed connection");
+			else
+				log_err("could not SSL_write");
+			fd_set_nonblock(data->fd);
+			free(finishframe);
+			return 0;
+		}
+	} else {
+		if(send(data->fd, finishframe, len, 0) == -1) {
+			log_err("send failed: %s", sock_strerror(errno));
+			fd_set_nonblock(data->fd);
+			free(finishframe);
+			return 0;
+		}
 	}
 	if(verbosity) log_info("sent control frame(finish)");
 
-	fd_set_nonblock(fd);
+	fd_set_nonblock(data->fd);
 	free(finishframe);
 	return 1;
 #else
 	log_err("no dnstap compiled, no reply");
-	(void)fd;
+	(void)data;
 	return 0;
 #endif
 }
@@ -933,7 +948,7 @@ static int tap_handshake(struct tap_data* data)
 #endif /* HAVE_SSL */
 
 /** callback for dnstap listener */
-void dtio_tap_callback(int fd, short ATTR_UNUSED(bits), void* arg)
+void dtio_tap_callback(int ATTR_UNUSED(fd), short ATTR_UNUSED(bits), void* arg)
 {
 	struct tap_data* data = (struct tap_data*)arg;
 	if(verbosity>=3) log_info("tap callback");
@@ -1016,7 +1031,7 @@ void dtio_tap_callback(int fd, short ATTR_UNUSED(bits), void* arg)
 		}
 	} else if(data->len >= 4 && sldns_read_uint32(data->frame) ==
 		FSTRM_CONTROL_FRAME_STOP && data->is_bidirectional) {
-		if(!reply_with_finish(fd)) {
+		if(!reply_with_finish(data)) {
 			tap_data_free(data);
 			return;
 		}
diff --git a/contrib/unbound/doc/Changelog b/contrib/unbound/doc/Changelog
index 899026352434..a7c9c40026e5 100644
--- a/contrib/unbound/doc/Changelog
+++ b/contrib/unbound/doc/Changelog
@@ -1,3 +1,326 @@
+25 August 2023: Wouter
+	- Fix compile error on NetBSD in util/netevent.h.
+
+23 August 2023: Wouter
+	- Tag for 1.18.0rc1 release.
+
+22 August 2023: Wouter
+	- Set version number to 1.18.0.
+
+21 August 2023: Wouter
+	- Debug Windows ci workflow.
+	- Fix windows ci workflow to install bison and flex.
+	- Fix for #925: unbound.service: Main process exited, code=killed,
+	  status=11/SEGV. Fixes cachedb configuration handling.
+	- Fix #923: processQueryResponse() THROWAWAY should be mindful of
+	  fail_reply.
+	- Fix unit test for unbound-control to work when threads are disabled,
+	  and fix cache dump check.
+
+18 August 2023: Wouter
+	- Fix for iter_dec_attempts that could cause a hang, part of
+	  capsforid and qname minimisation, depending on the settings.
+	- Fix uninitialized memory passed in padding bytes of cmsg to sendmsg.
+	- Fix stat_values test to work with dig that enables DNS cookies.
+
+17 August 2023: Wouter
+	- Merge PR #762: Downstream DNS Server Cookies a la RFC7873 and
+	  RFC9018. Create server cookies for clients that send client cookies.
+	  This needs to be explicitly turned on in the config file with:
+	  `answer-cookie: yes`. A `cookie-secret:` can be configured for
+	  anycast setups. Without one, a random cookie secret is generated.
+	  The acl option `allow_cookie` allows queries with either a valid
+	  cookie or over a stateful transport. The statistics output has
+	  `queries_cookie_valid` and `queries_cookie_client` and
+	  `queries_cookie_invalid` information. The `ip\-ratelimit\-cookie:`
+	  value determines a rate limit for queries with cookies, if desired.
+	- Fix regional_alloc_init for potential unaligned source of the copy.
+	- Fix ip_ratelimit test to work with dig that enables DNS cookies.
+
+2 August 2023: George
+	- Move a cache reply callback in worker.c closer to the cache reply
+	  generation.
+
+1 August 2023: George
+	- Merge #911 from natalie-reece: Exclude EDE before other EDNS options
+	  when there isn't enough space.
+	- For #911: Try to trim EXTRA-TEXT (and LDNS_EDE_OTHER options
+	  altogether) before giving up on attaching EDE options.
+	- More braces and formatting for Fix for EDNS EDE size calculation to
+	  avoid future bugs.
+	- Fix to use the now cached EDE, if any, for CD_bit queries.
+
+1 August 2023: Wouter
+	- Fix for EDNS EDE size calculation.
+
+31 July 2023: George
+	- Merge #790 from Tom Carpay: Add support for EDE caching in cachedb
+	  and subnetcache.
+
+31 July 2023: Wouter
+	- iana portlist update.
+
+30 July 2023: George
+	- Merge #759 from Tom Carpay: Add EDE (RFC8914) caching.
+
+28 July 2023: George
+	- Fix unused variable compile warning for kernel timestamps in
+	  netevent.c
+
+21 July 2023: George
+	- Merge #857 from eaglegai: fix potential memory leaks when errors
+	  happen.
+	- For #857: fix mixed declarations and code.
+	- Merge #118 from mibere: Changed verbosity level for Redis init &
+	  deinit.
+	- Merge #390 from Frank Riley: Add missing callbacks to the python
+	  module.
+	- Cleaner failure code for callback functions in interface.i.
+	- Merge #889 from borisVanhoof: Free memory in error case + remove
+	  unused function.
+	- For #889: use netcat-openbsd instead of netcat-traditional.
+	- For #889: Account for num_detached_states before possible
+	  mesh_state_delete when erroring out.
+
+20 July 2023: George
+	- Merge #909 from headshog: Numeric truncation when parsing TYPEXX and
+	  CLASSXX representation.
+	- For #909: Fix return values.
+	- Merge #901 from Sergei Trofimovich: config: improve handling of
+	  unknown modules.
+
+20 July 2023: Wouter
+	- For #909: Fix RR class comparison.
+
+14 July 2023: George
+	- More clear description of the different auth-zone behaviors on the
+	  man page.
+
+13 July 2023: George
+	- Merge #880 from chipitsine: services/authzone.c: remove redundant
+	  check.
+
+11 July 2023: George
+	- Merge #664 from tilan7763: Add prefetch support for subnet cache
+	  entries.
+	- For #664: Easier code flow for subnetcache prefetching.
+	- For #664: Add testcase.
+	- For #664: Rename subnet_prefetch tests to subnet_global_prefetch to
+	  differentiate from the new subnet prefetch support.
+
+3 July 2023: George
+	- Merge #739: Add SVCB dohpath support.
+	- Code cleanup for sldns_str2wire_svcparam_key_lookup.
+	- Merge #802: add validation EDEs to queries where the CD bit is set.
+	- For #802: Cleanup comments and add RCODE check for CD bit test case.
+	- Skip the 00-lint test. splint is not maintained; it either does not
+	  work or produces false positives. Static analysis is handled in the
+	  clang test.
+
+3 July 2023: Wouter
+	- Fix #906: warning: ‘Py_SetProgramName’ is deprecated.
+	- Fix dereference of NULL variable warning in mesh_do_callback.
+
+29 June 2023: George
+	- More fixes for reference counting for python module and clean up
+	  failure code.
+	- Merge #827 from rcmcdonald91: Eliminate unnecessary Python reloading
+	  which causes memory leaks.
+
+29 June 2023: Wouter
+	- Fix python modules with multiple scripts, by incrementing reference
+	  counts.
+
+27 June 2023: George
+	- Merge #892: Add cachedb hit stat. Introduces 'num.query.cachedb' as
+	  a new statistical counter.
+	- Remove warning about unknown cast-function-type warning pragma.
+
+22 June 2023: Wouter
+	- Merge #903: contrib: add yocto compatible init script.
+
+15 June 2023: Philip
+	- Fix for issue #887 (Timeouts to forward servers on BSD based
+	  system with ASLR)
+	- Probably fixes #516 (Stream reuse does not work on Windows) as well
+
+14 June 2023: George
+	- Properly handle all return values of worker_check_request during
+	  early EDE code.
+	- Do not check the incoming request more than once.
+
+12 June 2023: Wouter
+	- Merge #896: Fix: #895: pythonmodule: add all site-packages
+	  directories to sys.path.
+	- Fix #895: python + sysconfig gives ANOTHER path comparing to
+	  distutils.
+	- Fix for uncertain unit test for doh buffer size events.
+
+25 May 2023: Wouter
+	- Fix unbound-dnstap-socket printout when no query is present.
+	- Fix unbound-dnstap-socket time fraction conversion for printout.
+
+19 May 2023: Wouter
+	- Fix RPZ removal of client-ip, nsip, nsdname triggers from IXFR.
+	- Fix to remove unused variables from RPZ clientip data structure.
+
+16 May 2023: Wouter
+	- Fix #888: [FR] Use kernel timestamps for dnstap.
+	- Fix to print debug log for ancillary data with correct IP address.
+
+11 May 2023: Wouter
+	- Fix warning in windows compile, in set_recvtimestamp.
+
+4 May 2023: Wouter
+	- Fix #885: Error: util/configlexer.c: No such file or directory,
+	  adds error messages explaining to install flex and bison.
+	- Fix to remove unused whitespace from acx_nlnetlabs.m4 and config.h.
+	- Fix doxygen in addr_to_nat64 header definition.
+
+1 May 2023: George
+	- Merge #722 from David 'eqvinox' Lamparter: NAT64 support.
+	- For #722: minor fixes, formatting, refactoring.
+
+1 May 2023: Wouter
+	- Fix RPZ IP responses with trigger rpz-drop on cache entries, that
+	  they are dropped.
+
+26 April 2023: Philip
+	- Fix issue #860: Bad interaction with 0 TTL records and serve-expired
+
+26 April 2023: Wouter
+	- Merge #882 from vvfedorenko: Features/dropqueuedpackets, with
+	  sock-queue-timeout option that drops packets that have been in the
+	  socket queue for too long. Added statistics num.queries_timed_out
+	  and query.queue_time_us.max that track the socket queue timeouts.
+	- Fix for #882: small changes, date updated in Copyright for
+	  util/timeval_func.c and util/timeval_func.h. Man page entries and
+	  example entry.
+	- Fix for #882: document variable to stop doxygen warning.
+
+19 April 2023: Wouter
+	- Fix for #878: Invalid IP address in unbound.conf causes Segmentation
+	  Fault on OpenBSD.
+
+14 April 2023: Wouter
+	- Merge #875: change obsolete txt URL in unbound-anchor.c to point
+	  to RFC 7958, and Fix #874.
+
+13 April 2023: Wouter
+	- Fix build badge, from failing travis link to github ci action link.
+
+6 April 2023: Wouter
+	- Fix for #870: Add test case for the qname minimisation and CNAME.
+
+4 April 2023: Wouter
+	- Fix #870: NXDOMAIN instead of NOERROR rcode when asked for existing
+	  CNAME record.
+
+24 March 2023: Philip
+	- Fix issue #676: Unencrypted query is sent when
+	  forward-tls-upstream: yes is used without tls-cert-bundle
+	- Extra consistency check to make sure that when TLS is requested,
+	  either we set up a TLS connection or we return an error.
+
+21 March 2023: Philip
+	- Fix issue #851: reserved identifier violation 
+
+20 March 2023: Wouter
+	- iana portlist update.
+
+17 March 2023: George
+	- Fix #812, fix #846, by using the SSL_OP_IGNORE_UNEXPECTED_EOF option
+	  to ignore the unexpected eof while reading in openssl >= 3.
+
+16 March 2023: Wouter
+	- Fix ssl.h include brackets, instead of quotes.
+
+14 March 2023: Wouter
+	- Fix unbound-dnstap-socket test program to reply the finish frame
+	  over a TLS connection correctly.
+
+23 February 2023: Wouter
+	- Fix for #852: Completion of error handling.
+
+21 February 2023: Philip
+       - Fix #825: Unexpected behavior with client-subnet-always-forward
+         and serve-expired
+
+10 February 2023: George
+	- Clean up iterator/iterator.c::error_response_cache() and allow for
+	  better interaction with serve-expired, prefetch and cached error
+	  responses.
+
+9 February 2023: George
+	- Allow TTL refresh of expired error responses.
+	- Add testcase for refreshing expired error responses.
+
+9 February 2023: Wouter
+	- Fix to ignore entirely empty responses, and try at another authority.
+	  This turns completely empty responses, a type of noerror/nodata into
+	  a servfail, but they do not conform to RFC2308, and the retry can
+	  fetch improved content.
+	- Fix unit tests for spurious empty messages.
+	- Fix consistency of unit test without roundrobin answers for the
+	  cnametooptout unit test.
+	- Fix to git ignore the library symbol file that configure can create.
+
+8 February 2023: Wouter
+	- Fix #841: Unbound won't build with aaaa-filter-iterator.patch.
+
+30 January 2023: George
+	- Add duration variable for speed_local.test.
+
+26 January 2023: Wouter
+	- Fix acx_nlnetlabs.m4 for -Wstrict-prototypes.
+
+23 January 2023: George
+	- Fix #833: [FR] Ability to set the Redis password.
+
+23 January 2023: Wouter
+	- Fix #835: [FR] Ability to use Redis unix sockets.
+
+20 January 2023: Wouter
+	- Merge #819: Added new static zone type block_a to suppress all A
+	  queries for specific zones.
+
+19 January 2023: Wouter
+	- Set max-udp-size default to 1232. This is the same default value as
+	  the default value for edns-buffer-size. It restricts client edns
+	  buffer size choices, and makes unbound behave similar to other DNS
+	  resolvers. The new choice, down from 4096 means it is harder to get
+	  large responses from Unbound. Thanks to Xiang Li, from NISL Lab,
+	  Tsinghua University.
+	- Add harden-unknown-additional option. It removes
+	  unknown records from the authority section and additional section.
+	  Thanks to Xiang Li, from NISL Lab, Tsinghua University.
+	- Set default for harden-unknown-additional to no. So that it does
+	  not hamper future protocol developments.
+	- Fix test for new default.
+
+18 January 2023: Wouter
+	- Fix not following cleared RD flags potentially enables amplification
+	  DDoS attacks, reported by Xiang Li and Wei Xu from NISL Lab,
+	  Tsinghua University. The fix stops query loops, by refusing to send
+	  RD=0 queries to a forwarder, they still get answered from cache.
+
+13 January 2023: Wouter
+	- Merge #826: Аdd a metric about the maximum number of collisions in
+	  lrushah.
+	- Improve documentation for #826, describe the large collisions amount.
+
+9 January 2023: Wouter
+	- Fix python module install path detection.
+	- Fix python version detection in configure.
+
+6 January 2023: Wouter
+	- Fix #823: Response change to NODATA for some ANY queries since
+	  1.12, tested on 1.16.1.
+	- Fix wildcard in hyperlocal zone service degradation, reported
+	  by Sergey Kacheev. This fix is included in 1.17.1rc2.
+	  That became 1.17.1 on 12 Jan 2023, the code repo continues
+	  with 1.17.2. 1.17.1 excludes fix #823, it is included forwards.
+
 5 January 2023: Wouter
 	- Tag for 1.17.1 release.
 
diff --git a/contrib/unbound/doc/README b/contrib/unbound/doc/README
index faab92bcb077..8bc8765d464f 100644
--- a/contrib/unbound/doc/README
+++ b/contrib/unbound/doc/README
@@ -1,4 +1,4 @@
-README for Unbound 1.17.1
+README for Unbound 1.18.0
 Copyright 2007 NLnet Labs
 http://unbound.net
 
diff --git a/contrib/unbound/doc/README.DNS64 b/contrib/unbound/doc/README.DNS64
index 49446ac575d1..71e2310ed9aa 100644
--- a/contrib/unbound/doc/README.DNS64
+++ b/contrib/unbound/doc/README.DNS64
@@ -28,3 +28,23 @@ prefix. For example:
     ;; ANSWER SECTION:
     jazz-v4.viagenie.ca.        86400   IN      AAAA    64:ff9b::ce7b:1f02
 
+
+NAT64 support was added by David Lamparter in 2022; license(s) of the
+surrounding code apply.  Note that NAT64 is closely related but functionally
+orthogonal to DNS64;  it allows Unbound to send outgoing queries to IPv4-only
+servers over IPv6 through the configured NAT64 prefix.  This allows running
+an Unbound instance on an IPv6-only host without breaking every single domain
+that only has IPv4 servers.  Whether that Unbound instance also does DNS64 is
+an independent choice.
+
+To enable NAT64 in Unbound, add to unbound.conf's "server" section:
+
+    do-nat64: yes
+
+The NAT64 prefix defaults to the DNS64 prefix, which in turn defaults to the
+standard 64:FF9B::/96 prefix.  You can reconfigure it with:
+
+    nat64-prefix: 64:FF9B::/96
+
+To test NAT64 operation, pick a domain that only has IPv4 reachability for its
+nameservers and try resolving any names in that domain.
diff --git a/contrib/unbound/doc/example.conf.in b/contrib/unbound/doc/example.conf.in
index 8cf3d868285e..849e6d28446f 100644
--- a/contrib/unbound/doc/example.conf.in
+++ b/contrib/unbound/doc/example.conf.in
@@ -1,7 +1,7 @@
 #
 # Example configuration file.
 #
-# See unbound.conf(5) man page, version 1.17.1.
+# See unbound.conf(5) man page, version 1.18.0.
 #
 # this is a comment.
 
@@ -143,8 +143,8 @@ server:
 	# edns-buffer-size: 1232
 
 	# Maximum UDP response size (not applied to TCP response).
-	# Suggested values are 512 to 4096. Default is 4096. 65536 disables it.
-	# max-udp-size: 4096
+	# Suggested values are 512 to 4096. Default is 1232. 65536 disables it.
+	# max-udp-size: 1232
 
 	# max memory to use for stream(tcp and tls) waiting result buffers.
 	# stream-wait-size: 4m
@@ -243,6 +243,18 @@ server:
 	# Enable IPv6, "yes" or "no".
 	# do-ip6: yes
 
+	# If running unbound on an IPv6-only host, domains that only have
+	# IPv4 servers would become unresolveable.  If NAT64 is available in
+	# the network, unbound can use NAT64 to reach these servers with
+	# the following option.  This is NOT needed for enabling DNS64 on a
+	# system that has IPv4 connectivity.
+	# Consider also enabling prefer-ip6 to prefer native IPv6 connections
+	# to nameservers.
+	# do-nat64: no
+
+	# NAT64 prefix.  Defaults to using dns64-prefix value.
+	# nat64-prefix: 64:ff9b::0/96
+
 	# Enable UDP, "yes" or "no".
 	# do-udp: yes
 
@@ -274,6 +286,10 @@ server:
 	# Timeout for EDNS TCP keepalive, in msec.
 	# edns-tcp-keepalive-timeout: 120000
 
+	# UDP queries that have waited in the socket buffer for a long time
+	# can be dropped. Default is 0, disabled. In seconds, such as 3.
+	# sock-queue-timeout: 0
+
 	# Use systemd socket activation for UDP, TCP, and control sockets.
 	# use-systemd: no
 
@@ -503,6 +519,10 @@ server:
 	# to validate the zone.
 	# harden-algo-downgrade: no
 
+	# Harden against unknown records in the authority section and the
+	# additional section.
+	# harden-unknown-additional: no
+
 	# Sent minimum amount of information to upstream servers to enhance
 	# privacy. Only sent minimum required labels of the QNAME and set QTYPE
 	# to A when possible.
@@ -810,6 +830,8 @@ server:
 	# o always_transparent, always_refuse, always_nxdomain, always_nodata,
 	#   always_deny resolve in that way but ignore local data for
 	#   that name
+	# o block_a resolves all records normally but returns
+	#   NODATA for A queries and ignores local data for that name
 	# o always_null returns 0.0.0.0 or ::0 for any name in the zone.
 	# o noview breaks out of that view towards global local-zones.
 	#
@@ -1206,6 +1228,10 @@ remote-control:
 #     redis-server-host: 127.0.0.1
 #     # redis server's TCP port
 #     redis-server-port: 6379
+#     # if the server uses a unix socket, set its path, or "" when not used.
+#     # redis-server-path: "/var/lib/redis/redis-server.sock"
+#     # if the server uses an AUTH password, specify here, or "" when not used.
+#     # redis-server-password: ""
 #     # timeout (in ms) for communication with the redis server
 #     redis-timeout: 100
 #     # set timeout on redis records based on DNS response TTL
diff --git a/contrib/unbound/doc/libunbound.3.in b/contrib/unbound/doc/libunbound.3.in
index 19a213e1aa6f..429ac93407fd 100644
--- a/contrib/unbound/doc/libunbound.3.in
+++ b/contrib/unbound/doc/libunbound.3.in
@@ -1,4 +1,4 @@
-.TH "libunbound" "3" "Jan 12, 2023" "NLnet Labs" "unbound 1.17.1"
+.TH "libunbound" "3" "Aug 30, 2023" "NLnet Labs" "unbound 1.18.0"
 .\"
 .\" libunbound.3 -- unbound library functions manual
 .\"
@@ -44,7 +44,7 @@
 .B ub_ctx_zone_remove,
 .B ub_ctx_data_add,
 .B ub_ctx_data_remove
-\- Unbound DNS validating resolver 1.17.1 functions.
+\- Unbound DNS validating resolver 1.18.0 functions.
 .SH "SYNOPSIS"
 .B #include <unbound.h>
 .LP
diff --git a/contrib/unbound/doc/unbound-anchor.8.in b/contrib/unbound/doc/unbound-anchor.8.in
index 9bba2522a19c..4e862fc89c79 100644
--- a/contrib/unbound/doc/unbound-anchor.8.in
+++ b/contrib/unbound/doc/unbound-anchor.8.in
@@ -1,4 +1,4 @@
-.TH "unbound-anchor" "8" "Jan 12, 2023" "NLnet Labs" "unbound 1.17.1"
+.TH "unbound-anchor" "8" "Aug 30, 2023" "NLnet Labs" "unbound 1.18.0"
 .\"
 .\" unbound-anchor.8 -- unbound anchor maintenance utility manual
 .\"
diff --git a/contrib/unbound/doc/unbound-checkconf.8.in b/contrib/unbound/doc/unbound-checkconf.8.in
index 128f1cebd94b..6a2c2cc94eea 100644
--- a/contrib/unbound/doc/unbound-checkconf.8.in
+++ b/contrib/unbound/doc/unbound-checkconf.8.in
@@ -1,4 +1,4 @@
-.TH "unbound-checkconf" "8" "Jan 12, 2023" "NLnet Labs" "unbound 1.17.1"
+.TH "unbound-checkconf" "8" "Aug 30, 2023" "NLnet Labs" "unbound 1.18.0"
 .\"
 .\" unbound-checkconf.8 -- unbound configuration checker manual
 .\"
diff --git a/contrib/unbound/doc/unbound-control.8.in b/contrib/unbound/doc/unbound-control.8.in
index 10be612fe20e..db4eb72308a6 100644
--- a/contrib/unbound/doc/unbound-control.8.in
+++ b/contrib/unbound/doc/unbound-control.8.in
@@ -1,4 +1,4 @@
-.TH "unbound-control" "8" "Jan 12, 2023" "NLnet Labs" "unbound 1.17.1"
+.TH "unbound-control" "8" "Aug 30, 2023" "NLnet Labs" "unbound 1.18.0"
 .\"
 .\" unbound-control.8 -- unbound remote control manual
 .\"
@@ -369,6 +369,15 @@ number of queries received by thread
 .I threadX.num.queries_ip_ratelimited
 number of queries rate limited by thread
 .TP
+.I threadX.num.queries_cookie_valid
+number of queries with a valid DNS Cookie by thread
+.TP
+.I threadX.num.queries_cookie_client
+number of queries with a client part only DNS Cookie by thread
+.TP
+.I threadX.num.queries_cookie_invalid
+number of queries with an invalid DNS Cookie by thread
+.TP
 .I threadX.num.cachehits
 number of queries that were successfully answered using a cache lookup
 .TP
@@ -398,6 +407,14 @@ as a cache response was sent.
 .I threadX.num.expired
 number of replies that served an expired cache entry.
 .TP
+.I threadX.num.queries_timed_out
+number of queries that are dropped because they waited in the UDP socket buffer
+for too long.
+.TP
+.I threadX.query.queue_time_us.max
+The maximum wait time for packets in the socket buffer, in microseconds. This
+is only reported when sock-queue-timeout is enabled.
+.TP
 .I threadX.num.recursivereplies
 The number of replies sent to queries that needed recursive processing. Could be smaller than threadX.num.cachemiss if due to timeouts no replies were sent for some queries.
 .TP
@@ -438,6 +455,18 @@ buffers are full.
 .I total.num.queries
 summed over threads.
 .TP
+.I total.num.queries_ip_ratelimited
+summed over threads.
+.TP
+.I total.num.queries_cookie_valid
+summed over threads.
+.TP
+.I total.num.queries_cookie_client
+summed over threads.
+.TP
+.I total.num.queries_cookie_invalid
+summed over threads.
+.TP
 .I total.num.cachehits
 summed over threads.
 .TP
@@ -462,6 +491,12 @@ summed over threads.
 .I total.num.expired
 summed over threads.
 .TP
+.I total.num.queries_timed_out
+summed over threads.
+.TP
+.I total.query.queue_time_us.max
+the maximum of the thread values.
+.TP
 .I total.num.recursivereplies
 summed over threads.
 .TP
@@ -597,7 +632,7 @@ ratelimiting.
 .TP
 .I num.query.dnscrypt.shared_secret.cachemiss
 The number of dnscrypt queries that did not find a shared secret in the cache.
-The can be use to compute the shared secret hitrate.
+This can be used to compute the shared secret hitrate.
 .TP
 .I num.query.dnscrypt.replay
 The number of dnscrypt queries that found a nonce hit in the nonce cache and
@@ -653,6 +688,18 @@ timing and protocol support information.
 The number of items in the key cache.  These are DNSSEC keys, one item
 per delegation point, and their validation status.
 .TP
+.I msg.cache.max_collisions
+The maximum number of hash table collisions in the msg cache. This is the
+number of hashes that are identical when a new element is inserted in the
+hash table. If the value is very large, like hundreds, something is wrong
+with the performance of the hash table, hash values are incorrect or malicious.
+.TP
+.I rrset.cache.max_collisions
+The maximum number of hash table collisions in the rrset cache. This is the
+number of hashes that are identical when a new element is inserted in the
+hash table. If the value is very large, like hundreds, something is wrong
+with the performance of the hash table, hash values are incorrect or malicious.
+.TP
 .I dnscrypt_shared_secret.cache.count
 The number of items in the shared secret cache. These are precomputed shared
 secrets for a given client public key/server secret key pair. Shared secrets
@@ -692,7 +739,12 @@ Number of queries that got an answer that contained EDNS client subnet data.
 .I num.query.subnet_cache
 Number of queries answered from the edns client subnet cache.  These are
 counted as cachemiss by the main counters, but hit the client subnet
-specific cache, after getting processed by the edns client subnet module.
+specific cache after getting processed by the edns client subnet module.
+.TP
+.I num.query.cachedb
+Number of queries answered from the external cache of cachedb.
+These are counted as cachemiss by the main counters, but hit the cachedb
+external cache after getting processed by the cachedb module.
 .TP
 .I num.rpz.action.<rpz_action>
 Number of queries answered using configured RPZ policy, per RPZ action type.
diff --git a/contrib/unbound/doc/unbound-host.1.in b/contrib/unbound/doc/unbound-host.1.in
index 0af5777f0492..e4fe718ab071 100644
--- a/contrib/unbound/doc/unbound-host.1.in
+++ b/contrib/unbound/doc/unbound-host.1.in
@@ -1,4 +1,4 @@
-.TH "unbound\-host" "1" "Jan 12, 2023" "NLnet Labs" "unbound 1.17.1"
+.TH "unbound\-host" "1" "Aug 30, 2023" "NLnet Labs" "unbound 1.18.0"
 .\"
 .\" unbound-host.1 -- unbound DNS lookup utility
 .\"
diff --git a/contrib/unbound/doc/unbound.8.in b/contrib/unbound/doc/unbound.8.in
index 498690805c85..7b955a92e542 100644
--- a/contrib/unbound/doc/unbound.8.in
+++ b/contrib/unbound/doc/unbound.8.in
@@ -1,4 +1,4 @@
-.TH "unbound" "8" "Jan 12, 2023" "NLnet Labs" "unbound 1.17.1"
+.TH "unbound" "8" "Aug 30, 2023" "NLnet Labs" "unbound 1.18.0"
 .\"
 .\" unbound.8 -- unbound manual
 .\"
@@ -9,7 +9,7 @@
 .\"
 .SH "NAME"
 .B unbound
-\- Unbound DNS validating resolver 1.17.1.
+\- Unbound DNS validating resolver 1.18.0.
 .SH "SYNOPSIS"
 .B unbound
 .RB [ \-h ]
diff --git a/contrib/unbound/doc/unbound.conf.5.in b/contrib/unbound/doc/unbound.conf.5.in
index 3844d52551c6..1c785ea5fa6a 100644
--- a/contrib/unbound/doc/unbound.conf.5.in
+++ b/contrib/unbound/doc/unbound.conf.5.in
@@ -1,4 +1,4 @@
-.TH "unbound.conf" "5" "Jan 12, 2023" "NLnet Labs" "unbound 1.17.1"
+.TH "unbound.conf" "5" "Aug 30, 2023" "NLnet Labs" "unbound 1.18.0"
 .\"
 .\" unbound.conf.5 -- unbound.conf manual
 .\"
@@ -233,7 +233,8 @@ number).
 .B max\-udp\-size: \fI<number>
 Maximum UDP response size (not applied to TCP response).  65536 disables the
 udp response size maximum, and uses the choice from the client, always.
-Suggested values are 512 to 4096. Default is 4096.
+Suggested values are 512 to 4096. Default is 1232. The default value is the
+same as the default for edns\-buffer\-size.
 .TP
 .B stream\-wait\-size: \fI<number>
 Number of bytes size maximum to use for waiting stream buffers.  Default is
@@ -504,6 +505,14 @@ configured, and finally to 0 if the number of free buffers falls below
 A minimum actual timeout of 200 milliseconds is observed regardless of the
 advertised timeout.
 .TP
+.B sock\-queue\-timeout: \fI<sec>\fR
+UDP queries that have waited in the socket buffer for a long time can be
+dropped. Default is 0, disabled. The time is set in seconds, 3 could be a
+good value to ignore old queries that likely the client does not need a reply
+for any more. This could happen if the host has not been able to service
+the queries for a while, i.e. Unbound is not running, and then is enabled
+again. It uses timestamp socket options.
+.TP
 .B tcp\-upstream: \fI<yes or no>
 Enable or disable whether the upstream queries use TCP only for transport.
 Default is no.  Useful in tunneling scenarios. If set to no you can specify
@@ -692,17 +701,17 @@ This option is experimental at this time.
 .B access\-control: \fI<IP netblock> <action>
 The netblock is given as an IP4 or IP6 address with /size appended for a
 classless network block. The action can be \fIdeny\fR, \fIrefuse\fR,
-\fIallow\fR, \fIallow_setrd\fR, \fIallow_snoop\fR, \fIdeny_non_local\fR or
-\fIrefuse_non_local\fR.
+\fIallow\fR, \fIallow_setrd\fR, \fIallow_snoop\fR, \fIallow_cookie\fR,
+\fIdeny_non_local\fR or \fIrefuse_non_local\fR.
 The most specific netblock match is used, if none match \fIrefuse\fR is used.
 The order of the access\-control statements therefore does not matter.
 .IP
-The action \fIdeny\fR stops queries from hosts from that netblock.
+The \fIdeny\fR action stops queries from hosts from that netblock.
 .IP
-The action \fIrefuse\fR stops queries too, but sends a DNS rcode REFUSED
+The \fIrefuse\fR action stops queries too, but sends a DNS rcode REFUSED
 error message back.
 .IP
-The action \fIallow\fR gives access to clients from that netblock.
+The \fIallow\fR action gives access to clients from that netblock.
 It gives only access for recursion clients (which is
 what almost all clients need).  Nonrecursive queries are refused.
 .IP
@@ -722,13 +731,27 @@ may be useful if another DNS server must forward requests for specific
 zones to a resolver DNS server, but only supports stub domains and
 sends queries to the resolver DNS server with the RD bit cleared.
 .IP
-The action \fIallow_snoop\fR gives nonrecursive access too.  This give
+The \fIallow_snoop\fR action gives nonrecursive access too.  This give
 both recursive and non recursive access.  The name \fIallow_snoop\fR refers
 to cache snooping, a technique to use nonrecursive queries to examine
 the cache contents (for malicious acts).  However, nonrecursive queries can
 also be a valuable debugging tool (when you want to examine the cache
 contents). In that case use \fIallow_snoop\fR for your administration host.
 .IP
+The \fIallow_cookie\fR action allows access to UDP queries that contain a
+valid DNS Cookie as specified in RFC 7873 and RFC 9018, when the
+\fBanswer\-cookie\fR option is enabled.
+UDP queries containing only a DNS Client Cookie and no Server Cookie, or an
+invalid DNS Cookie, will receive a BADCOOKIE response including a newly
+generated DNS Cookie, allowing clients to retry with that DNS Cookie.
+The \fIallow_cookie\fR action will also accept requests over stateful
+transports, regardless of the presence of an DNS Cookie and regardless of the
+\fBanswer\-cookie\fR setting.
+If \fBip\-ratelimit\fR is used, clients with a valid DNS Cookie will bypass the
+ratelimit.
+If a ratelimit for such clients is still needed, \fBip\-ratelimit\-cookie\fR
+can be used instead.
+.IP
 By default only localhost is \fIallow\fRed, the rest is \fIrefuse\fRd.
 The default is \fIrefuse\fRd, because that is protocol\-friendly. The DNS
 protocol is not designed to handle dropped packets due to policy, and
@@ -1019,6 +1042,12 @@ validate the zone.  Default is no.  Zone signers must produce zones
 that allow this feature to work, but sometimes they do not, and turning
 this option off avoids that validation failure.
 .TP
+.B harden\-unknown\-additional: \fI<yes or no>
+Harden against unknown records in the authority section and additional
+section. Default is no. If no, such records are copied from the upstream
+and presented to the client together with the answer. If yes, it could
+hamper future protocol developments that want to add records.
+.TP
 .B use\-caps\-for\-id: \fI<yes or no>
 Use 0x20\-encoded random bits in the query to foil spoof attempts.
 This perturbs the lowercase and uppercase of query names sent to
@@ -1391,10 +1420,10 @@ address space are not validated.  This is usually required whenever
 Configure a local zone. The type determines the answer to give if
 there is no match from local\-data. The types are deny, refuse, static,
 transparent, redirect, nodefault, typetransparent, inform, inform_deny,
-inform_redirect, always_transparent, always_refuse, always_nxdomain, always_null, noview,
-and are explained below. After that the default settings are listed. Use
-local\-data: to enter data into the local zone. Answers for local zones
-are authoritative DNS answers. By default the zones are class IN.
+inform_redirect, always_transparent, block_a, always_refuse, always_nxdomain,
+always_null, noview, and are explained below. After that the default settings
+are listed. Use local\-data: to enter data into the local zone. Answers for
+local zones are authoritative DNS answers. By default the zones are class IN.
 .IP
 If you need more complicated authoritative data, with referrals, wildcards,
 CNAME/DNAME support, or DNSSEC authoritative service, setup a stub\-zone for
@@ -1469,6 +1498,12 @@ Ie. answer queries with fixed data and also log the machines that ask.
 \h'5'\fIalways_transparent\fR
 Like transparent, but ignores local data and resolves normally.
 .TP 10
+\h'5'\fIblock_a\fR
+Like transparent, but ignores local data and resolves normally all query
+types excluding A. For A queries it unconditionally returns NODATA.
+Useful in cases when there is a need to explicitly force all apps to use
+IPv6 protocol and avoid any queries to IPv4.
+.TP 10
 \h'5'\fIalways_refuse\fR
 Like refuse, but ignores local data and refuses the query.
 .TP 10
@@ -1785,11 +1820,27 @@ A value of 0 will disable ratelimiting for domain names that end in this name.
 .TP 5
 .B ip\-ratelimit: \fI<number or 0>
 Enable global ratelimiting of queries accepted per IP address.
-If 0, the default, it is disabled.  This option is experimental at this time.
+This option is experimental at this time.
 The ratelimit is in queries per second that are allowed.  More queries are
 completely dropped and will not receive a reply, SERVFAIL or otherwise.
 IP ratelimiting happens before looking in the cache. This may be useful for
 mitigating amplification attacks.
+Default is 0 (disabled).
+.TP 5
+.B ip\-ratelimit\-cookie: \fI<number or 0>
+Enable global ratelimiting of queries accepted per IP address with a valid DNS
+Cookie.
+This option is experimental at this time.
+The ratelimit is in queries per second that are allowed.
+More queries are completely dropped and will not receive a reply, SERVFAIL or
+otherwise.
+IP ratelimiting happens before looking in the cache.
+This option could be useful in combination with \fIallow_cookie\fR in an
+attempt to mitigate other amplification attacks than UDP reflections (e.g.,
+attacks targeting Unbound itself) which are already handled with DNS Cookies.
+If used, the value is suggested to be higher than \fBip\-ratelimit\fR e.g.,
+tenfold.
+Default is 0 (disabled).
 .TP 5
 .B ip\-ratelimit\-size: \fI<memory size>
 Give the size of the data structure in which the current ongoing rates are
@@ -1858,6 +1909,18 @@ Set the number of servers that should be used for fast server selection. Only
 use the fastest specified number of servers with the fast\-server\-permil
 option, that turns this on or off. The default is to use the fastest 3 servers.
 .TP 5
+.B answer\-cookie: \fI<yes or no>
+If enabled, Unbound will answer to requests containing DNS Cookies as
+specified in RFC 7873 and RFC 9018.
+Default is no.
+.TP 5
+.B cookie\-secret: \fI<128 bit hex string>
+Server's secret for DNS Cookie generation.
+Useful to explicitly set for servers in an anycast deployment that need to
+share the secret in order to verify each other's Server Cookies.
+An example hex string would be "000102030405060708090a0b0c0d0e0f".
+Default is a 128 bits random secret generated at startup time.
+.TP 5
 .B edns\-client\-string: \fI<IP netblock> <string>
 Include an EDNS0 option containing configured ascii string in queries with
 destination address matching the configured IP netblock.  This configuration
@@ -2091,13 +2154,32 @@ useful when you want immediate changes to be visible.
 Authority zones are configured with \fBauth\-zone:\fR, and each one must
 have a \fBname:\fR.  There can be multiple ones, by listing multiple auth\-zone clauses, each with a different name, pertaining to that part of the namespace.
 The authority zone with the name closest to the name looked up is used.
-Authority zones are processed after \fBlocal\-zones\fR and before
-cache (\fBfor\-downstream:\fR \fIyes\fR), and when used in this manner
-make Unbound respond like an authority server.  Authority zones are also
-processed after cache, just before going to the network to fetch
-information for recursion (\fBfor\-upstream:\fR \fIyes\fR), and when used
-in this manner provide a local copy of an authority server that speeds up
-lookups of that data.
+Authority zones can be processed on two distinct, non-exclusive, configurable
+stages.
+.LP
+With \fBfor\-downstream:\fR \fIyes\fR (default), authority zones are processed
+after \fBlocal\-zones\fR and before cache.
+When used in this manner, Unbound responds like an authority server with no
+further processing other than returning an answer from the zone contents.
+A notable example, in this case, is CNAME records which are returned verbatim
+to downstream clients without further resolution.
+.LP
+With \fBfor\-upstream:\fR \fIyes\fR (default), authority zones are processed
+after the cache lookup, just before going to the network to fetch
+information for recursion.
+When used in this manner they provide a local copy of an authority server
+that speeds up lookups for that data during resolving.
+.LP
+If both options are enabled (default), client queries for an authority zone are
+answered authoritatively from Unbound, while internal queries that require data
+from the authority zone consult the local zone data instead of going to the
+network.
+.LP
+An interesting configuration is \fBfor\-downstream:\fR \fIno\fR,
+\fBfor\-upstream:\fR \fIyes\fR that allows for hyperlocal behavior where both
+client and internal queries consult the local zone data while resolving.
+In this case, the aforementioned CNAME example will result in a thoroughly
+resolved answer.
 .LP
 Authority zones can be read from zonefile.  And can be kept updated via
 AXFR and IXFR.  After update the zonefile is rewritten.  The update mechanism
@@ -2291,6 +2373,21 @@ List domain for which the AAAA records are ignored and the A record is
 used by dns64 processing instead.  Can be entered multiple times, list a
 new domain for which it applies, one per line.  Applies also to names
 underneath the name given.
+.SS "NAT64 Operation"
+.LP
+NAT64 operation allows using a NAT64 prefix for outbound requests to IPv4-only
+servers.  It is controlled by two options in the \fBserver:\fR section:
+.TP
+.B do\-nat64: \fI<yes or no>\fR
+Use NAT64 to reach IPv4-only servers.
+Consider also enabling \fBprefer\-ip6\fR to prefer native IPv6 connections to
+nameservers.
+Default no.
+.TP
+.B nat64\-prefix: \fI<IPv6 prefix>\fR
+Use a specific NAT64 prefix to reach IPv4-only servers.  Defaults to using
+the prefix configured in \fBdns64\-prefix\fR, which in turn defaults to
+64:ff9b::/96.  The prefix length must be one of /32, /40, /48, /56, /64 or /96.
 .SS "DNSCrypt Options"
 .LP
 The
@@ -2586,6 +2683,16 @@ This option defaults to "127.0.0.1".
 The TCP port number of the Redis server.
 This option defaults to 6379.
 .TP
+.B redis-server-path: \fI<unix socket path>\fR
+The unix socket path to connect to the redis server. Off by default, and it
+can be set to "" to turn this off. Unix sockets may have better throughput
+than the IP address option.
+.TP
+.B redis-server-password: \fI"<password>"\fR
+The Redis AUTH password to use for the redis server.
+Only relevant if Redis is configured for client password authorisation.
+Off by default, and it can be set to "" to turn this off.
+.TP
 .B redis-timeout: \fI<msec>\fR
 The period until when Unbound waits for a response from the Redis sever.
 If this timeout expires Unbound closes the connection, treats it as
diff --git a/contrib/unbound/edns-subnet/subnetmod.c b/contrib/unbound/edns-subnet/subnetmod.c
index 458a89702269..13fd669b5d52 100644
--- a/contrib/unbound/edns-subnet/subnetmod.c
+++ b/contrib/unbound/edns-subnet/subnetmod.c
@@ -352,7 +352,7 @@ update_cache(struct module_qstate *qstate, int id)
 		((struct subnet_qstate*)qstate->minfo[id])->qinfo_hash :
 		query_info_hash(&qstate->qinfo, qstate->query_flags);
 	/* Step 1, general qinfo lookup */
-	struct lruhash_entry *lru_entry = slabhash_lookup(subnet_msg_cache, h,
+	struct lruhash_entry* lru_entry = slabhash_lookup(subnet_msg_cache, h,
 		&qstate->qinfo, 1);
 	int need_to_insert = (lru_entry == NULL);
 	if (!lru_entry) {
@@ -396,7 +396,7 @@ update_cache(struct module_qstate *qstate, int id)
 		log_err("subnetcache: cache insertion failed");
 		return;
 	}
-	
+
 	/* store RRsets */
 	for(i=0; i<rep->rrset_count; i++) {
 		rep->ref[i].key = rep->rrsets[i];
@@ -421,7 +421,7 @@ update_cache(struct module_qstate *qstate, int id)
 
 /** Lookup in cache and reply true iff reply is sent. */
 static int
-lookup_and_reply(struct module_qstate *qstate, int id, struct subnet_qstate *sq)
+lookup_and_reply(struct module_qstate *qstate, int id, struct subnet_qstate *sq, int prefetch)
 {
 	struct lruhash_entry *e;
 	struct module_env *env = qstate->env;
@@ -473,6 +473,10 @@ lookup_and_reply(struct module_qstate *qstate, int id, struct subnet_qstate *sq)
 			INET6_SIZE);
 		sq->ecs_client_out.subnet_validdata = 1;
 	}
+
+	if (prefetch && *qstate->env->now >= ((struct reply_info *)node->elem)->prefetch_ttl) {
+		qstate->need_refetch = 1;
+	}
 	return 1;
 }
 
@@ -509,7 +513,7 @@ eval_response(struct module_qstate *qstate, int id, struct subnet_qstate *sq)
 		 * module_finished */
 		return module_finished;
 	}
-	
+
 	/* We have not asked for subnet data */
 	if (!sq->subnet_sent) {
 		if (s_in->subnet_validdata)
@@ -518,7 +522,7 @@ eval_response(struct module_qstate *qstate, int id, struct subnet_qstate *sq)
 			cp_edns_bad_response(c_out, c_in);
 		return module_finished;
 	}
-	
+
 	/* subnet sent but nothing came back */
 	if (!s_in->subnet_validdata) {
 		/* The authority indicated no support for edns subnet. As a
@@ -535,11 +539,11 @@ eval_response(struct module_qstate *qstate, int id, struct subnet_qstate *sq)
 			cp_edns_bad_response(c_out, c_in);
 		return module_finished;
 	}
-	
+
 	/* Being here means we have asked for and got a subnet specific 
 	 * answer. Also, the answer from the authority is not yet cached 
 	 * anywhere. */
-	
+
 	/* can we accept response? */
 	if(s_out->subnet_addr_fam != s_in->subnet_addr_fam ||
 		s_out->subnet_source_mask != s_in->subnet_source_mask ||
@@ -779,6 +783,11 @@ subnetmod_operate(struct module_qstate *qstate, enum module_ev event,
 				&qstate->mesh_info->reply_list->query_reply.client_addr,
 				&sq->ecs_client_in, qstate->env->cfg);
 		}
+		else if(qstate->client_addr.ss_family != AF_UNSPEC) {
+			subnet_option_from_ss(
+				&qstate->client_addr,
+				&sq->ecs_client_in, qstate->env->cfg);
+		}
 		
 		if(sq->ecs_client_in.subnet_validdata == 0) {
 			/* No clients are interested in result or we could not
@@ -802,7 +811,9 @@ subnetmod_operate(struct module_qstate *qstate, enum module_ev event,
 
 		if(!sq->started_no_cache_lookup && !qstate->blacklist) {
 			lock_rw_wrlock(&sne->biglock);
-			if(lookup_and_reply(qstate, id, sq)) {
+			if(qstate->mesh_info->reply_list &&
+				lookup_and_reply(qstate, id, sq,
+				qstate->env->cfg->prefetch)) {
 				sne->num_msg_cache++;
 				lock_rw_unlock(&sne->biglock);
 				verbose(VERB_QUERY, "subnetcache: answered from cache");
diff --git a/contrib/unbound/iterator/iter_delegpt.c b/contrib/unbound/iterator/iter_delegpt.c
index fd07aaa13355..c8b9a3ffe29d 100644
--- a/contrib/unbound/iterator/iter_delegpt.c
+++ b/contrib/unbound/iterator/iter_delegpt.c
@@ -321,6 +321,45 @@ void delegpt_log(enum verbosity_value v, struct delegpt* dp)
 	}
 }
 
+int
+delegpt_addr_on_result_list(struct delegpt* dp, struct delegpt_addr* find)
+{
+	struct delegpt_addr* a = dp->result_list;
+	while(a) {
+		if(a == find)
+			return 1;
+		a = a->next_result;
+	}
+	return 0;
+}
+
+void
+delegpt_usable_list_remove_addr(struct delegpt* dp, struct delegpt_addr* del)
+{
+	struct delegpt_addr* usa = dp->usable_list, *prev = NULL;
+	while(usa) {
+		if(usa == del) {
+			/* snip off the usable list */
+			if(prev)
+				prev->next_usable = usa->next_usable;
+			else	dp->usable_list = usa->next_usable;
+			return;
+		}
+		prev = usa;
+		usa = usa->next_usable;
+	}
+}
+
+void
+delegpt_add_to_result_list(struct delegpt* dp, struct delegpt_addr* a)
+{
+	if(delegpt_addr_on_result_list(dp, a))
+		return;
+	delegpt_usable_list_remove_addr(dp, a);
+	a->next_result = dp->result_list;
+	dp->result_list = a;
+}
+
 void 
 delegpt_add_unused_targets(struct delegpt* dp)
 {
diff --git a/contrib/unbound/iterator/iter_delegpt.h b/contrib/unbound/iterator/iter_delegpt.h
index 586597a69a1f..49f6f6b8130f 100644
--- a/contrib/unbound/iterator/iter_delegpt.h
+++ b/contrib/unbound/iterator/iter_delegpt.h
@@ -457,4 +457,29 @@ int delegpt_add_target_mlc(struct delegpt* dp, uint8_t* name, size_t namelen,
 /** get memory in use by dp */
 size_t delegpt_get_mem(struct delegpt* dp);
 
+/**
+ * See if the addr is on the result list.
+ * @param dp: delegation point.
+ * @param find: the pointer is searched for on the result list.
+ * @return 1 if found, 0 if not found.
+ */
+int delegpt_addr_on_result_list(struct delegpt* dp, struct delegpt_addr* find);
+
+/**
+ * Remove the addr from the usable list.
+ * @param dp: the delegation point.
+ * @param del: the addr to remove from the list, the pointer is searched for.
+ */
+void delegpt_usable_list_remove_addr(struct delegpt* dp,
+	struct delegpt_addr* del);
+
+/**
+ * Add the delegpt_addr back to the result list, if it is not already on
+ * the result list. Also removes it from the usable list.
+ * @param dp: delegation point.
+ * @param a: addr to add, nothing happens if it is already on the result list.
+ *	It is removed from the usable list.
+ */
+void delegpt_add_to_result_list(struct delegpt* dp, struct delegpt_addr* a);
+
 #endif /* ITERATOR_ITER_DELEGPT_H */
diff --git a/contrib/unbound/iterator/iter_resptype.c b/contrib/unbound/iterator/iter_resptype.c
index c2b824a0f9b8..e85595b843d3 100644
--- a/contrib/unbound/iterator/iter_resptype.c
+++ b/contrib/unbound/iterator/iter_resptype.c
@@ -284,6 +284,13 @@ response_type_from_server(int rdset,
 
 	/* If we've gotten this far, this is NOERROR/NODATA (which could 
 	 * be an entirely empty message) */
+	/* but ignore entirely empty messages, noerror/nodata has a soa
+	 * negative ttl value in the authority section, this makes it try
+	 * again at another authority. And turns it from a 5 second empty
+	 * message into a 5 second servfail response. */
+	if(msg->rep->an_numrrsets == 0 && msg->rep->ns_numrrsets == 0 &&
+		msg->rep->ar_numrrsets == 0)
+		return RESPONSE_TYPE_THROWAWAY;
 	/* check if recursive answer; saying it has empty cache */
 	if( (msg->rep->flags&BIT_RA) && !(msg->rep->flags&BIT_AA) && !rdset)
 		return RESPONSE_TYPE_REC_LAME;
diff --git a/contrib/unbound/iterator/iter_scrub.c b/contrib/unbound/iterator/iter_scrub.c
index f093c1bf999a..d1fedcd0f908 100644
--- a/contrib/unbound/iterator/iter_scrub.c
+++ b/contrib/unbound/iterator/iter_scrub.c
@@ -346,6 +346,26 @@ soa_in_auth(struct msg_parse* msg)
 	return 0;
 }
 
+/** Check if type is allowed in the authority section */
+static int
+type_allowed_in_authority_section(uint16_t tp)
+{
+	if(tp == LDNS_RR_TYPE_SOA || tp == LDNS_RR_TYPE_NS ||
+		tp == LDNS_RR_TYPE_DS || tp == LDNS_RR_TYPE_NSEC ||
+		tp == LDNS_RR_TYPE_NSEC3)
+		return 1;
+	return 0;
+}
+
+/** Check if type is allowed in the additional section */
+static int
+type_allowed_in_additional_section(uint16_t tp)
+{
+	if(tp == LDNS_RR_TYPE_A || tp == LDNS_RR_TYPE_AAAA)
+		return 1;
+	return 0;
+}
+
 /**
  * This routine normalizes a response. This includes removing "irrelevant"
  * records from the answer and additional sections and (re)synthesizing
@@ -355,11 +375,13 @@ soa_in_auth(struct msg_parse* msg)
  * @param msg: msg to normalize.
  * @param qinfo: original query.
  * @param region: where to allocate synthesized CNAMEs.
+ * @param env: module env with config options.
  * @return 0 on error.
  */
 static int
 scrub_normalize(sldns_buffer* pkt, struct msg_parse* msg, 
-	struct query_info* qinfo, struct regional* region)
+	struct query_info* qinfo, struct regional* region,
+	struct module_env* env)
 {
 	uint8_t* sname = qinfo->qname;
 	size_t snamelen = qinfo->qname_len;
@@ -511,6 +533,7 @@ scrub_normalize(sldns_buffer* pkt, struct msg_parse* msg,
 
 	/* Mark additional names from AUTHORITY */
 	while(rrset && rrset->section == LDNS_SECTION_AUTHORITY) {
+		/* protect internals of recursor by making sure to del these */
 		if(rrset->type==LDNS_RR_TYPE_DNAME ||
 			rrset->type==LDNS_RR_TYPE_CNAME ||
 			rrset->type==LDNS_RR_TYPE_A ||
@@ -519,6 +542,13 @@ scrub_normalize(sldns_buffer* pkt, struct msg_parse* msg,
 				"RRset:", pkt, msg, prev, &rrset);
 			continue;
 		}
+		/* Allowed list of types in the authority section */
+		if(env->cfg->harden_unknown_additional &&
+			!type_allowed_in_authority_section(rrset->type)) {
+			remove_rrset("normalize: removing irrelevant "
+				"RRset:", pkt, msg, prev, &rrset);
+			continue;
+		}
 		/* only one NS set allowed in authority section */
 		if(rrset->type==LDNS_RR_TYPE_NS) {
 			/* NS set must be pertinent to the query */
@@ -576,7 +606,6 @@ scrub_normalize(sldns_buffer* pkt, struct msg_parse* msg,
 	 * found in ANSWER and AUTHORITY. */
 	/* These records have not been marked OK previously */
 	while(rrset && rrset->section == LDNS_SECTION_ADDITIONAL) {
-		/* FIXME: what about other types? */
 		if(rrset->type==LDNS_RR_TYPE_A || 
 			rrset->type==LDNS_RR_TYPE_AAAA) 
 		{
@@ -589,6 +618,7 @@ scrub_normalize(sldns_buffer* pkt, struct msg_parse* msg,
 				continue;
 			}
 		}
+		/* protect internals of recursor by making sure to del these */
 		if(rrset->type==LDNS_RR_TYPE_DNAME || 
 			rrset->type==LDNS_RR_TYPE_CNAME ||
 			rrset->type==LDNS_RR_TYPE_NS) {
@@ -596,6 +626,13 @@ scrub_normalize(sldns_buffer* pkt, struct msg_parse* msg,
 				"RRset:", pkt, msg, prev, &rrset);
 			continue;
 		}
+		/* Allowed list of types in the additional section */
+		if(env->cfg->harden_unknown_additional &&
+			!type_allowed_in_additional_section(rrset->type)) {
+			remove_rrset("normalize: removing irrelevant "
+				"RRset:", pkt, msg, prev, &rrset);
+			continue;
+		}
 		prev = rrset;
 		rrset = rrset->rrset_all_next;
 	}
@@ -846,7 +883,7 @@ scrub_message(sldns_buffer* pkt, struct msg_parse* msg,
 	}
 
 	/* normalize the response, this cleans up the additional.  */
-	if(!scrub_normalize(pkt, msg, qinfo, region))
+	if(!scrub_normalize(pkt, msg, qinfo, region, env))
 		return 0;
 	/* delete all out-of-zone information */
 	if(!scrub_sanitize(pkt, msg, qinfo, zonename, env, ie))
diff --git a/contrib/unbound/iterator/iter_utils.c b/contrib/unbound/iterator/iter_utils.c
index b2a2309ab4b1..10a8ec3eb08f 100644
--- a/contrib/unbound/iterator/iter_utils.c
+++ b/contrib/unbound/iterator/iter_utils.c
@@ -71,6 +71,11 @@
 /** time when nameserver glue is said to be 'recent' */
 #define SUSPICION_RECENT_EXPIRY 86400
 
+/** if NAT64 is enabled and no NAT64 prefix is configured, first fall back to
+ * DNS64 prefix.  If that is not configured, fall back to this default value.
+ */
+static const char DEFAULT_NAT64_PREFIX[] = "64:ff9b::/96";
+
 /** fillup fetch policy array */
 static void
 fetch_fill(struct iter_env* ie, const char* str)
@@ -142,6 +147,7 @@ caps_white_apply_cfg(rbtree_type* ntree, struct config_file* cfg)
 int
 iter_apply_cfg(struct iter_env* iter_env, struct config_file* cfg)
 {
+	const char *nat64_prefix;
 	int i;
 	/* target fetch policy */
 	if(!read_fetch_policy(iter_env, cfg->target_fetch_policy))
@@ -172,8 +178,32 @@ iter_apply_cfg(struct iter_env* iter_env, struct config_file* cfg)
 		}
 
 	}
+
+	nat64_prefix = cfg->nat64_prefix;
+	if(!nat64_prefix)
+		nat64_prefix = cfg->dns64_prefix;
+	if(!nat64_prefix)
+		nat64_prefix = DEFAULT_NAT64_PREFIX;
+	if(!netblockstrtoaddr(nat64_prefix, 0, &iter_env->nat64_prefix_addr,
+		&iter_env->nat64_prefix_addrlen,
+		&iter_env->nat64_prefix_net)) {
+		log_err("cannot parse nat64-prefix netblock: %s", nat64_prefix);
+		return 0;
+	}
+	if(!addr_is_ip6(&iter_env->nat64_prefix_addr,
+		iter_env->nat64_prefix_addrlen)) {
+		log_err("nat64-prefix is not IPv6: %s", cfg->nat64_prefix);
+		return 0;
+	}
+	if(!prefixnet_is_nat64(iter_env->nat64_prefix_net)) {
+		log_err("nat64-prefix length it not 32, 40, 48, 56, 64 or 96: %s",
+			nat64_prefix);
+		return 0;
+	}
+
 	iter_env->supports_ipv6 = cfg->do_ip6;
 	iter_env->supports_ipv4 = cfg->do_ip4;
+	iter_env->use_nat64 = cfg->do_nat64;
 	iter_env->outbound_msg_retry = cfg->outbound_msg_retry;
 	iter_env->max_sent_count = cfg->max_sent_count;
 	iter_env->max_query_restarts = cfg->max_query_restarts;
@@ -240,7 +270,8 @@ iter_filter_unsuitable(struct iter_env* iter_env, struct module_env* env,
 	if(!iter_env->supports_ipv6 && addr_is_ip6(&a->addr, a->addrlen)) {
 		return -1; /* there is no ip6 available */
 	}
-	if(!iter_env->supports_ipv4 && !addr_is_ip6(&a->addr, a->addrlen)) {
+	if(!iter_env->supports_ipv4 && !iter_env->use_nat64 &&
+	   !addr_is_ip6(&a->addr, a->addrlen)) {
 		return -1; /* there is no ip4 available */
 	}
 	/* check lameness - need zone , class info */
@@ -747,10 +778,15 @@ iter_mark_pside_cycle_targets(struct module_qstate* qstate, struct delegpt* dp)
 
 int
 iter_dp_is_useless(struct query_info* qinfo, uint16_t qflags,
-	struct delegpt* dp, int supports_ipv4, int supports_ipv6)
+	struct delegpt* dp, int supports_ipv4, int supports_ipv6,
+	int use_nat64)
 {
 	struct delegpt_ns* ns;
 	struct delegpt_addr* a;
+
+	if(supports_ipv6 && use_nat64)
+		supports_ipv4 = 1;
+
 	/* check:
 	 *      o RD qflag is on.
 	 *      o no addresses are provided.
@@ -1310,8 +1346,7 @@ void iter_dec_attempts(struct delegpt* dp, int d, int outbound_msg_retry)
 	for(a=dp->target_list; a; a = a->next_target) {
 		if(a->attempts >= outbound_msg_retry) {
 			/* add back to result list */
-			a->next_result = dp->result_list;
-			dp->result_list = a;
+			delegpt_add_to_result_list(dp, a);
 		}
 		if(a->attempts > d)
 			a->attempts -= d;
diff --git a/contrib/unbound/iterator/iter_utils.h b/contrib/unbound/iterator/iter_utils.h
index 850be96a6e16..fa860fa682fc 100644
--- a/contrib/unbound/iterator/iter_utils.h
+++ b/contrib/unbound/iterator/iter_utils.h
@@ -189,10 +189,13 @@ void iter_mark_pside_cycle_targets(struct module_qstate* qstate,
  * 	if not, then the IPv4 addresses are useless.
  * @param supports_ipv6: if we support ipv6 for lookups to the target.
  * 	if not, then the IPv6 addresses are useless.
+ * @param use_nat64: if we support NAT64 for lookups to the target.
+ *	if yes, IPv4 addresses are useful even if we don't support IPv4.
  * @return true if dp is useless.
  */
-int iter_dp_is_useless(struct query_info* qinfo, uint16_t qflags, 
-	struct delegpt* dp, int supports_ipv4, int supports_ipv6);
+int iter_dp_is_useless(struct query_info* qinfo, uint16_t qflags,
+	struct delegpt* dp, int supports_ipv4, int supports_ipv6,
+	int use_nat64);
 
 /**
  * See if qname has DNSSEC needs.  This is true if there is a trust anchor above
diff --git a/contrib/unbound/iterator/iterator.c b/contrib/unbound/iterator/iterator.c
index 33095b2b5c45..1548dfcaee62 100644
--- a/contrib/unbound/iterator/iterator.c
+++ b/contrib/unbound/iterator/iterator.c
@@ -255,7 +255,7 @@ error_supers(struct module_qstate* qstate, int id, struct module_qstate* super)
 				log_err("out of memory adding missing");
 		}
 		delegpt_mark_neg(dpns, qstate->qinfo.qtype);
-		if((dpns->got4 == 2 || !ie->supports_ipv4) &&
+		if((dpns->got4 == 2 || (!ie->supports_ipv4 && !ie->use_nat64)) &&
 			(dpns->got6 == 2 || !ie->supports_ipv6)) {
 			dpns->resolved = 1; /* mark as failed */
 			target_count_increase_nx(super_iq, 1);
@@ -302,81 +302,65 @@ error_response(struct module_qstate* qstate, int id, int rcode)
 static int
 error_response_cache(struct module_qstate* qstate, int id, int rcode)
 {
-	if(!qstate->no_cache_store) {
-		/* store in cache */
-		struct reply_info err;
-		if(qstate->prefetch_leeway > NORR_TTL) {
-			verbose(VERB_ALGO, "error response for prefetch in cache");
-			/* attempt to adjust the cache entry prefetch */
-			if(dns_cache_prefetch_adjust(qstate->env, &qstate->qinfo,
-				NORR_TTL, qstate->query_flags))
-				return error_response(qstate, id, rcode);
-			/* if that fails (not in cache), fall through to store err */
+	struct reply_info err;
+	struct msgreply_entry* msg;
+	if(qstate->no_cache_store) {
+		return error_response(qstate, id, rcode);
+	}
+	if(qstate->prefetch_leeway > NORR_TTL) {
+		verbose(VERB_ALGO, "error response for prefetch in cache");
+		/* attempt to adjust the cache entry prefetch */
+		if(dns_cache_prefetch_adjust(qstate->env, &qstate->qinfo,
+			NORR_TTL, qstate->query_flags))
+			return error_response(qstate, id, rcode);
+		/* if that fails (not in cache), fall through to store err */
+	}
+	if((msg=msg_cache_lookup(qstate->env,
+		qstate->qinfo.qname, qstate->qinfo.qname_len,
+		qstate->qinfo.qtype, qstate->qinfo.qclass,
+		qstate->query_flags, 0,
+		qstate->env->cfg->serve_expired_ttl_reset)) != NULL) {
+		struct reply_info* rep = (struct reply_info*)msg->entry.data;
+		if(qstate->env->cfg->serve_expired &&
+			qstate->env->cfg->serve_expired_ttl_reset && rep &&
+			*qstate->env->now + qstate->env->cfg->serve_expired_ttl
+			> rep->serve_expired_ttl) {
+			verbose(VERB_ALGO, "reset serve-expired-ttl for "
+				"response in cache");
+			rep->serve_expired_ttl = *qstate->env->now +
+				qstate->env->cfg->serve_expired_ttl;
 		}
-		if(qstate->env->cfg->serve_expired) {
-			/* if serving expired contents, and such content is
-			 * already available, don't overwrite this servfail */
-			struct msgreply_entry* msg;
-			if((msg=msg_cache_lookup(qstate->env,
-				qstate->qinfo.qname, qstate->qinfo.qname_len,
-				qstate->qinfo.qtype, qstate->qinfo.qclass,
-				qstate->query_flags, 0,
-				qstate->env->cfg->serve_expired_ttl_reset))
-				!= NULL) {
-				if(qstate->env->cfg->serve_expired_ttl_reset) {
-					struct reply_info* rep =
-						(struct reply_info*)msg->entry.data;
-					if(rep && *qstate->env->now +
-						qstate->env->cfg->serve_expired_ttl  >
-						rep->serve_expired_ttl) {
-						rep->serve_expired_ttl =
-							*qstate->env->now +
-							qstate->env->cfg->serve_expired_ttl;
-					}
-				}
-				lock_rw_unlock(&msg->entry.lock);
-				return error_response(qstate, id, rcode);
-			}
-			/* serving expired contents, but nothing is cached
-			 * at all, so the servfail cache entry is useful
-			 * (stops waste of time on this servfail NORR_TTL) */
-		} else {
-			/* don't overwrite existing (non-expired) data in
-			 * cache with a servfail */
-			struct msgreply_entry* msg;
-			if((msg=msg_cache_lookup(qstate->env,
-				qstate->qinfo.qname, qstate->qinfo.qname_len,
-				qstate->qinfo.qtype, qstate->qinfo.qclass,
-				qstate->query_flags, *qstate->env->now, 0))
-				!= NULL) {
-				struct reply_info* rep = (struct reply_info*)
-					msg->entry.data;
-				if(FLAGS_GET_RCODE(rep->flags) ==
-					LDNS_RCODE_NOERROR ||
-					FLAGS_GET_RCODE(rep->flags) ==
-					LDNS_RCODE_NXDOMAIN) {
-					/* we have a good entry,
-					 * don't overwrite */
-					lock_rw_unlock(&msg->entry.lock);
-					return error_response(qstate, id, rcode);
-				}
-				lock_rw_unlock(&msg->entry.lock);
-			}
-			
+		if(rep && (FLAGS_GET_RCODE(rep->flags) ==
+			LDNS_RCODE_NOERROR ||
+			FLAGS_GET_RCODE(rep->flags) ==
+			LDNS_RCODE_NXDOMAIN ||
+			FLAGS_GET_RCODE(rep->flags) ==
+			LDNS_RCODE_YXDOMAIN) &&
+			(qstate->env->cfg->serve_expired ||
+			*qstate->env->now <= rep->ttl)) {
+			/* we have a good entry, don't overwrite */
+			lock_rw_unlock(&msg->entry.lock);
+			return error_response(qstate, id, rcode);
 		}
-		memset(&err, 0, sizeof(err));
-		err.flags = (uint16_t)(BIT_QR | BIT_RA);
-		FLAGS_SET_RCODE(err.flags, rcode);
-		err.qdcount = 1;
-		err.ttl = NORR_TTL;
-		err.prefetch_ttl = PREFETCH_TTL_CALC(err.ttl);
-		err.serve_expired_ttl = NORR_TTL;
-		/* do not waste time trying to validate this servfail */
-		err.security = sec_status_indeterminate;
-		verbose(VERB_ALGO, "store error response in message cache");
-		iter_dns_store(qstate->env, &qstate->qinfo, &err, 0, 0, 0, NULL,
-			qstate->query_flags, qstate->qstarttime);
-	}
+		lock_rw_unlock(&msg->entry.lock);
+		/* nothing interesting is cached (already error response or
+		 * expired good record when we don't serve expired), so this
+		 * servfail cache entry is useful (stops waste of time on this
+		 * servfail NORR_TTL) */
+	}
+	/* store in cache */
+	memset(&err, 0, sizeof(err));
+	err.flags = (uint16_t)(BIT_QR | BIT_RA);
+	FLAGS_SET_RCODE(err.flags, rcode);
+	err.qdcount = 1;
+	err.ttl = NORR_TTL;
+	err.prefetch_ttl = PREFETCH_TTL_CALC(err.ttl);
+	err.serve_expired_ttl = NORR_TTL;
+	/* do not waste time trying to validate this servfail */
+	err.security = sec_status_indeterminate;
+	verbose(VERB_ALGO, "store error response in message cache");
+	iter_dns_store(qstate->env, &qstate->qinfo, &err, 0, 0, 0, NULL,
+		qstate->query_flags, qstate->qstarttime);
 	return error_response(qstate, id, rcode);
 }
 
@@ -590,6 +574,54 @@ handle_cname_response(struct module_qstate* qstate, struct iter_qstate* iq,
 	return 1;
 }
 
+/** fill fail address for later recovery */
+static void
+fill_fail_addr(struct iter_qstate* iq, struct sockaddr_storage* addr,
+	socklen_t addrlen)
+{
+	if(addrlen == 0) {
+		iq->fail_addr_type = 0;
+		return;
+	}
+	if(((struct sockaddr_in*)addr)->sin_family == AF_INET) {
+		iq->fail_addr_type = 4;
+		memcpy(&iq->fail_addr.in,
+			&((struct sockaddr_in*)addr)->sin_addr,
+			sizeof(iq->fail_addr.in));
+	}
+#ifdef AF_INET6
+	else if(((struct sockaddr_in*)addr)->sin_family == AF_INET6) {
+		iq->fail_addr_type = 6;
+		memcpy(&iq->fail_addr.in6,
+			&((struct sockaddr_in6*)addr)->sin6_addr,
+			sizeof(iq->fail_addr.in6));
+	}
+#endif
+	else {
+		iq->fail_addr_type = 0;
+	}
+}
+
+/** print fail addr to string */
+static void
+print_fail_addr(struct iter_qstate* iq, char* buf, size_t len)
+{
+	if(iq->fail_addr_type == 4) {
+		if(inet_ntop(AF_INET, &iq->fail_addr.in, buf,
+			(socklen_t)len) == 0)
+			(void)strlcpy(buf, "(inet_ntop error)", len);
+	}
+#ifdef AF_INET6
+	else if(iq->fail_addr_type == 6) {
+		if(inet_ntop(AF_INET6, &iq->fail_addr.in6, buf,
+			(socklen_t)len) == 0)
+			(void)strlcpy(buf, "(inet_ntop error)", len);
+	}
+#endif
+	else
+		(void)strlcpy(buf, "", len);
+}
+
 /** add response specific error information for log servfail */
 static void
 errinf_reply(struct module_qstate* qstate, struct iter_qstate* iq)
@@ -597,16 +629,14 @@ errinf_reply(struct module_qstate* qstate, struct iter_qstate* iq)
 	if(qstate->env->cfg->val_log_level < 2 && !qstate->env->cfg->log_servfail)
 		return;
 	if((qstate->reply && qstate->reply->remote_addrlen != 0) ||
-		(iq->fail_reply && iq->fail_reply->remote_addrlen != 0)) {
+		(iq->fail_addr_type != 0)) {
 		char from[256], frm[512];
 		if(qstate->reply && qstate->reply->remote_addrlen != 0)
 			addr_to_str(&qstate->reply->remote_addr,
 				qstate->reply->remote_addrlen, from,
 				sizeof(from));
 		else
-			addr_to_str(&iq->fail_reply->remote_addr,
-				iq->fail_reply->remote_addrlen, from,
-				sizeof(from));
+			print_fail_addr(iq, from, sizeof(from));
 		snprintf(frm, sizeof(frm), "from %s", from);
 		errinf(qstate, frm);
 	}
@@ -1137,7 +1167,7 @@ generate_a_aaaa_check(struct module_qstate* qstate, struct iter_qstate* iq,
  * Generate a NS check request to obtain authoritative information
  * on an NS rrset.
  *
- * @param qstate: the qtstate that triggered the need to prime.
+ * @param qstate: the qstate that triggered the need to prime.
  * @param iq: iterator query state.
  * @param id: module id.
  */
@@ -1451,6 +1481,19 @@ processInitRequest(struct module_qstate* qstate, struct iter_qstate* iq,
 			errinf(qstate, "malloc failure for forward zone");
 			return error_response(qstate, id, LDNS_RCODE_SERVFAIL);
 		}
+		if((qstate->query_flags&BIT_RD)==0) {
+			/* If the server accepts RD=0 queries and forwards
+			 * with RD=1, then if the server is listed as an NS
+			 * entry, it starts query loops. Stop that loop by
+			 * disallowing the query. The RD=0 was previously used
+			 * to check the cache with allow_snoop. For stubs,
+			 * the iterator pass would have primed the stub and
+			 * then cached information can be used for further
+			 * queries. */
+			verbose(VERB_ALGO, "cannot forward RD=0 query, to stop query loops");
+			errinf(qstate, "cannot forward RD=0 query");
+			return error_response(qstate, id, LDNS_RCODE_SERVFAIL);
+		}
 		iq->refetch_glue = 0;
 		iq->minimisation_state = DONOT_MINIMISE_STATE;
 		/* the request has been forwarded.
@@ -1560,18 +1603,19 @@ processInitRequest(struct module_qstate* qstate, struct iter_qstate* iq,
 
 		/* see if this dp not useless.
 		 * It is useless if:
-		 *	o all NS items are required glue. 
+		 *	o all NS items are required glue.
 		 *	  or the query is for NS item that is required glue.
 		 *	o no addresses are provided.
 		 *	o RD qflag is on.
 		 * Instead, go up one level, and try to get even further
-		 * If the root was useless, use safety belt information. 
+		 * If the root was useless, use safety belt information.
 		 * Only check cache returns, because replies for servers
 		 * could be useless but lead to loops (bumping into the
 		 * same server reply) if useless-checked.
 		 */
-		if(iter_dp_is_useless(&qstate->qinfo, qstate->query_flags, 
-			iq->dp, ie->supports_ipv4, ie->supports_ipv6)) {
+		if(iter_dp_is_useless(&qstate->qinfo, qstate->query_flags,
+			iq->dp, ie->supports_ipv4, ie->supports_ipv6,
+			ie->use_nat64)) {
 			struct delegpt* retdp = NULL;
 			if(!can_have_last_resort(qstate->env, iq->dp->name, iq->dp->namelen, iq->qchase.qclass, &retdp)) {
 				if(retdp) {
@@ -1932,7 +1976,7 @@ query_for_targets(struct module_qstate* qstate, struct iter_qstate* iq,
 				break;
 		}
 		/* Send the A request. */
-		if(ie->supports_ipv4 &&
+		if((ie->supports_ipv4 || ie->use_nat64) &&
 			((ns->lame && !ns->done_pside4) ||
 			(!ns->lame && !ns->got4))) {
 			if(!generate_target_query(qstate, iq, id, 
@@ -2085,14 +2129,14 @@ processLastResort(struct module_qstate* qstate, struct iter_qstate* iq,
 		/* if this nameserver is at a delegation point, but that
 		 * delegation point is a stub and we cannot go higher, skip*/
 		if( ((ie->supports_ipv6 && !ns->done_pside6) ||
-		    (ie->supports_ipv4 && !ns->done_pside4)) &&
+		    ((ie->supports_ipv4 || ie->use_nat64) && !ns->done_pside4)) &&
 		    !can_have_last_resort(qstate->env, ns->name, ns->namelen,
 			iq->qchase.qclass, NULL)) {
 			log_nametypeclass(VERB_ALGO, "cannot pside lookup ns "
 				"because it is also a stub/forward,",
 				ns->name, LDNS_RR_TYPE_NS, iq->qchase.qclass);
 			if(ie->supports_ipv6) ns->done_pside6 = 1;
-			if(ie->supports_ipv4) ns->done_pside4 = 1;
+			if(ie->supports_ipv4 || ie->use_nat64) ns->done_pside4 = 1;
 			continue;
 		}
 		/* query for parent-side A and AAAA for nameservers */
@@ -2117,7 +2161,7 @@ processLastResort(struct module_qstate* qstate, struct iter_qstate* iq,
 				return 0;
 			}
 		}
-		if(ie->supports_ipv4 && !ns->done_pside4) {
+		if((ie->supports_ipv4 || ie->use_nat64) && !ns->done_pside4) {
 			/* Send the A request. */
 			if(!generate_parentside_target_query(qstate, iq, id, 
 				ns->name, ns->namelen, 
@@ -2259,6 +2303,8 @@ processQueryTargets(struct module_qstate* qstate, struct iter_qstate* iq,
 	int tf_policy;
 	struct delegpt_addr* target;
 	struct outbound_entry* outq;
+	struct sockaddr_storage real_addr;
+	socklen_t real_addrlen;
 	int auth_fallback = 0;
 	uint8_t* qout_orig = NULL;
 	size_t qout_orig_len = 0;
@@ -2384,7 +2430,7 @@ processQueryTargets(struct module_qstate* qstate, struct iter_qstate* iq,
 	}
 	if(!ie->supports_ipv6)
 		delegpt_no_ipv6(iq->dp);
-	if(!ie->supports_ipv4)
+	if(!ie->supports_ipv4 && !ie->use_nat64)
 		delegpt_no_ipv4(iq->dp);
 	delegpt_log(VERB_ALGO, iq->dp);
 
@@ -2805,12 +2851,24 @@ processQueryTargets(struct module_qstate* qstate, struct iter_qstate* iq,
 	/* We have a valid target. */
 	if(verbosity >= VERB_QUERY) {
 		log_query_info(VERB_QUERY, "sending query:", &iq->qinfo_out);
-		log_name_addr(VERB_QUERY, "sending to target:", iq->dp->name, 
+		log_name_addr(VERB_QUERY, "sending to target:", iq->dp->name,
 			&target->addr, target->addrlen);
 		verbose(VERB_ALGO, "dnssec status: %s%s",
 			iq->dnssec_expected?"expected": "not expected",
 			iq->dnssec_lame_query?" but lame_query anyway": "");
 	}
+
+	real_addr = target->addr;
+	real_addrlen = target->addrlen;
+
+	if(ie->use_nat64 && target->addr.ss_family == AF_INET) {
+		addr_to_nat64(&target->addr, &ie->nat64_prefix_addr,
+			ie->nat64_prefix_addrlen, ie->nat64_prefix_net,
+			&real_addr, &real_addrlen);
+		log_name_addr(VERB_QUERY, "applied NAT64:",
+			iq->dp->name, &real_addr, real_addrlen);
+	}
+
 	fptr_ok(fptr_whitelist_modenv_send_query(qstate->env->send_query));
 	outq = (*qstate->env->send_query)(&iq->qinfo_out,
 		iq->chase_flags | (iq->chase_to_rd?BIT_RD:0),
@@ -2821,7 +2879,7 @@ processQueryTargets(struct module_qstate* qstate, struct iter_qstate* iq,
 		!qstate->blacklist&&(!iter_qname_indicates_dnssec(qstate->env,
 		&iq->qinfo_out)||target->attempts==1)?0:BIT_CD),
 		iq->dnssec_expected, iq->caps_fallback || is_caps_whitelisted(
-		ie, iq), sq_check_ratelimit, &target->addr, target->addrlen,
+		ie, iq), sq_check_ratelimit, &real_addr, real_addrlen,
 		iq->dp->name, iq->dp->namelen,
 		(iq->dp->tcp_upstream || qstate->env->cfg->tcp_upstream),
 		(iq->dp->ssl_upstream || qstate->env->cfg->ssl_upstream),
@@ -2838,7 +2896,7 @@ processQueryTargets(struct module_qstate* qstate, struct iter_qstate* iq,
 			return error_response(qstate, id, LDNS_RCODE_SERVFAIL);
 		}
 		log_addr(VERB_QUERY, "error sending query to auth server",
-			&target->addr, target->addrlen);
+			&real_addr, real_addrlen);
 		if(qstate->env->cfg->qname_minimisation)
 			iq->minimisation_state = SKIP_MINIMISE_STATE;
 		return next_state(iq, QUERYTARGETS_STATE);
@@ -2882,7 +2940,7 @@ static int
 processQueryResponse(struct module_qstate* qstate, struct iter_qstate* iq,
 	struct iter_env* ie, int id)
 {
-	int dnsseclame = 0;
+	int dnsseclame = 0, origtypecname = 0;
 	enum response_type type;
 
 	iq->num_current_queries--;
@@ -2965,6 +3023,8 @@ processQueryResponse(struct module_qstate* qstate, struct iter_qstate* iq,
 		/* YXDOMAIN is a permanent error, no need to retry */
 		type = RESPONSE_TYPE_ANSWER;
 	}
+	if(type == RESPONSE_TYPE_CNAME)
+		origtypecname = 1;
 	if(type == RESPONSE_TYPE_CNAME && iq->response->rep->an_numrrsets >= 1
 		&& ntohs(iq->response->rep->rrsets[0]->rk.type) == LDNS_RR_TYPE_DNAME) {
 		uint8_t* sname = NULL;
@@ -3050,11 +3110,14 @@ processQueryResponse(struct module_qstate* qstate, struct iter_qstate* iq,
 				iq->minimisation_state = DONOT_MINIMISE_STATE;
 			}
 			if(FLAGS_GET_RCODE(iq->response->rep->flags) ==
-				LDNS_RCODE_NXDOMAIN) {
+				LDNS_RCODE_NXDOMAIN && !origtypecname) {
 				/* Stop resolving when NXDOMAIN is DNSSEC
 				 * signed. Based on assumption that nameservers
 				 * serving signed zones do not return NXDOMAIN
 				 * for empty-non-terminals. */
+				/* If this response is actually a CNAME type,
+				 * the nxdomain rcode may not be for the qname,
+				 * and so it is not the final response. */
 				if(iq->dnssec_expected)
 					return final_state(iq);
 				/* Make subrequest to validate intermediate
@@ -3182,7 +3245,7 @@ processQueryResponse(struct module_qstate* qstate, struct iter_qstate* iq,
 		(*qstate->env->detach_subs)(qstate);
 		iq->num_target_queries = 0;
 		iq->response = NULL;
-		iq->fail_reply = NULL;
+		iq->fail_addr_type = 0;
 		verbose(VERB_ALGO, "cleared outbound list for next round");
 		return next_state(iq, QUERYTARGETS_STATE);
 	} else if(type == RESPONSE_TYPE_CNAME) {
@@ -3564,7 +3627,7 @@ processTargetResponse(struct module_qstate* qstate, int id,
 	} else {
 		verbose(VERB_ALGO, "iterator TargetResponse failed");
 		delegpt_mark_neg(dpns, qstate->qinfo.qtype);
-		if((dpns->got4 == 2 || !ie->supports_ipv4) &&
+		if((dpns->got4 == 2 || (!ie->supports_ipv4 && !ie->use_nat64)) &&
 			(dpns->got6 == 2 || !ie->supports_ipv6)) {
 			dpns->resolved = 1; /* fail the target */
 			/* do not count cached answers */
@@ -3809,6 +3872,9 @@ processFinished(struct module_qstate* qstate, struct iter_qstate* iq,
 	/* make sure QR flag is on */
 	iq->response->rep->flags |= BIT_QR;
 
+	/* explicitly set the EDE string to NULL */
+	iq->response->rep->reason_bogus_str = NULL;
+
 	/* we have finished processing this query */
 	qstate->ext_state[id] = module_finished;
 
@@ -3987,7 +4053,8 @@ process_response(struct module_qstate* qstate, struct iter_qstate* iq,
 	}
 
 	/* parse message */
-	iq->fail_reply = qstate->reply;
+	fill_fail_addr(iq, &qstate->reply->remote_addr,
+		qstate->reply->remote_addrlen);
 	prs = (struct msg_parse*)regional_alloc(qstate->env->scratch, 
 		sizeof(struct msg_parse));
 	if(!prs) {
diff --git a/contrib/unbound/iterator/iterator.h b/contrib/unbound/iterator/iterator.h
index 89038dc8a7e6..fad7f03e63de 100644
--- a/contrib/unbound/iterator/iterator.h
+++ b/contrib/unbound/iterator/iterator.h
@@ -103,7 +103,7 @@ extern int BLACKLIST_PENALTY;
 #define RTT_BAND 400
 
 /**
- * Global state for the iterator. 
+ * Global state for the iterator.
  */
 struct iter_env {
 	/** A flag to indicate whether or not we have an IPv6 route */
@@ -112,6 +112,18 @@ struct iter_env {
 	/** A flag to indicate whether or not we have an IPv4 route */
 	int supports_ipv4;
 
+	/** A flag to locally apply NAT64 to make IPv4 addrs into IPv6 */
+	int use_nat64;
+
+	/** NAT64 prefix address, cf. dns64_env->prefix_addr */
+	struct sockaddr_storage nat64_prefix_addr;
+
+	/** sizeof(sockaddr_in6) */
+	socklen_t nat64_prefix_addrlen;
+
+	/** CIDR mask length of NAT64 prefix */
+	int nat64_prefix_net;
+
 	/** A set of inetaddrs that should never be queried. */
 	struct iter_donotq* donotq;
 
@@ -439,7 +451,14 @@ struct iter_qstate {
 	/** true if there have been parse failures of reply packets */
 	int parse_failures;
 	/** a failure printout address for last received answer */
-	struct comm_reply* fail_reply;
+	union {
+		struct in_addr in;
+#ifdef AF_INET6
+		struct in6_addr in6;
+#endif
+	} fail_addr;
+	/** which fail_addr, 0 is nothing, 4 or 6 */
+	int fail_addr_type;
 };
 
 /**
diff --git a/contrib/unbound/libunbound/libworker.c b/contrib/unbound/libunbound/libworker.c
index b9ef02217a2f..104244937bf0 100644
--- a/contrib/unbound/libunbound/libworker.c
+++ b/contrib/unbound/libunbound/libworker.c
@@ -168,14 +168,12 @@ libworker_setup(struct ub_ctx* ctx, int is_bg, struct ub_event_base* eb)
 		hints_delete(w->env->hints);
 		w->env->hints = NULL;
 	}
-	if(cfg->ssl_upstream || (cfg->tls_cert_bundle && cfg->tls_cert_bundle[0]) || cfg->tls_win_cert) {
-		w->sslctx = connect_sslctx_create(NULL, NULL,
-			cfg->tls_cert_bundle, cfg->tls_win_cert);
-		if(!w->sslctx) {
-			/* to make the setup fail after unlock */
-			hints_delete(w->env->hints);
-			w->env->hints = NULL;
-		}
+	w->sslctx = connect_sslctx_create(NULL, NULL,
+		cfg->tls_cert_bundle, cfg->tls_win_cert);
+	if(!w->sslctx) {
+		/* to make the setup fail after unlock */
+		hints_delete(w->env->hints);
+		w->env->hints = NULL;
 	}
 	if(!w->is_bg || w->is_bg_thread) {
 		lock_basic_unlock(&ctx->cfglock);
@@ -605,6 +603,8 @@ setup_qinfo_edns(struct libworker* w, struct ctx_query* q,
 	edns->opt_list_out = NULL;
 	edns->opt_list_inplace_cb_out = NULL;
 	edns->padding_block_size = 0;
+	edns->cookie_present = 0;
+	edns->cookie_valid = 0;
 	if(sldns_buffer_capacity(w->back->udp_buff) < 65535)
 		edns->udp_size = (uint16_t)sldns_buffer_capacity(
 			w->back->udp_buff);
diff --git a/contrib/unbound/libunbound/unbound-event.h b/contrib/unbound/libunbound/unbound-event.h
index 5fa74df78186..5ca81908a904 100644
--- a/contrib/unbound/libunbound/unbound-event.h
+++ b/contrib/unbound/libunbound/unbound-event.h
@@ -52,8 +52,8 @@
  * unbound was compiled with, otherwise it wouldn't work, the event and
  * event_base structures would be different.
  */
-#ifndef _UB_UNBOUND_EVENT_H
-#define _UB_UNBOUND_EVENT_H
+#ifndef UB_UNBOUND_EVENT_H
+#define UB_UNBOUND_EVENT_H
 
 #ifdef __cplusplus
 extern "C" {
@@ -262,4 +262,4 @@ int ub_resolve_event(struct ub_ctx* ctx, const char* name, int rrtype,
 }
 #endif
 
-#endif /* _UB_UNBOUND_H */
+#endif /* UB_UNBOUND_EVENT_H */
diff --git a/contrib/unbound/libunbound/unbound.h b/contrib/unbound/libunbound/unbound.h
index c779d183e385..bb8e8acf033c 100644
--- a/contrib/unbound/libunbound/unbound.h
+++ b/contrib/unbound/libunbound/unbound.h
@@ -4,22 +4,22 @@
  * Copyright (c) 2007, NLnet Labs. All rights reserved.
  *
  * This software is open source.
- * 
+ *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
- * 
+ *
  * Redistributions of source code must retain the above copyright notice,
  * this list of conditions and the following disclaimer.
- * 
+ *
  * Redistributions in binary form must reproduce the above copyright notice,
  * this list of conditions and the following disclaimer in the documentation
  * and/or other materials provided with the distribution.
- * 
+ *
  * Neither the name of the NLNET LABS nor the names of its contributors may
  * be used to endorse or promote products derived from this software without
  * specific prior written permission.
- * 
+ *
  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
@@ -36,7 +36,7 @@
 /**
  * \file
  *
- * This file contains functions to resolve DNS queries and 
+ * This file contains functions to resolve DNS queries and
  * validate the answers. Synchronously and asynchronously.
  *
  * Several ways to use this interface from an application wishing
@@ -65,7 +65,7 @@
  *	... or process() calls my_callback() with results.
  *
  *      ... if the application has nothing more to do, wait for answer
- *      ub_wait(ctx); 
+ *      ub_wait(ctx);
  *
  * Application threaded. Blocking.
  *	Blocking, same as above. The current thread does the work.
@@ -83,7 +83,7 @@
  * CRYPTO_set_id_callback and CRYPTO_set_locking_callback.
  *
  * If no threading is compiled in, the above async example uses fork(2) to
- * create a process to perform the work. The forked process exits when the 
+ * create a process to perform the work. The forked process exits when the
  * calling process exits, or ctx_delete() is called.
  * Otherwise, for asynchronous with threading, a worker thread is created.
  *
@@ -94,8 +94,8 @@
  * The second calls another worker thread (or process) to perform the work.
  * And no buffers need to be set up, but a context-switch happens.
  */
-#ifndef _UB_UNBOUND_H
-#define _UB_UNBOUND_H
+#ifndef UB_UNBOUND_H
+#define UB_UNBOUND_H
 
 #ifdef __cplusplus
 extern "C" {
@@ -128,10 +128,10 @@ struct ub_result {
 	/** the class asked for */
 	int qclass;
 
-	/** 
-	 * a list of network order DNS rdata items, terminated with a 
+	/**
+	 * a list of network order DNS rdata items, terminated with a
 	 * NULL pointer, so that data[0] is the first result entry,
-	 * data[1] the second, and the last entry is NULL. 
+	 * data[1] the second, and the last entry is NULL.
 	 * If there was no data, data[0] is NULL.
 	 */
 	char** data;
@@ -139,8 +139,8 @@ struct ub_result {
 	/** the length in bytes of the data items, len[i] for data[i] */
 	int* len;
 
-	/** 
-	 * canonical name for the result (the final cname). 
+	/**
+	 * canonical name for the result (the final cname).
 	 * zero terminated string.
 	 * May be NULL if no canonical name exists.
 	 */
@@ -165,9 +165,9 @@ struct ub_result {
 	 */
 	int havedata;
 
-	/** 
+	/**
 	 * If there was no data, and the domain did not exist, this is true.
-	 * If it is false, and there was no data, then the domain name 
+	 * If it is false, and there was no data, then the domain name
 	 * is purported to exist, but the requested data type is not available.
 	 */
 	int nxdomain;
@@ -182,19 +182,19 @@ struct ub_result {
 	 */
 	int secure;
 
-	/** 
-	 * If the result was not secure (secure==0), and this result is due 
+	/**
+	 * If the result was not secure (secure==0), and this result is due
 	 * to a security failure, bogus is true.
 	 * This means the data has been actively tampered with, signatures
-	 * failed, expected signatures were not present, timestamps on 
+	 * failed, expected signatures were not present, timestamps on
 	 * signatures were out of date and so on.
 	 *
-	 * If !secure and !bogus, this can happen if the data is not secure 
-	 * because security is disabled for that domain name. 
+	 * If !secure and !bogus, this can happen if the data is not secure
+	 * because security is disabled for that domain name.
 	 * This means the data is from a domain where data is not signed.
 	 */
 	int bogus;
-	
+
 	/**
 	 * If the result is bogus this contains a string (zero terminated)
 	 * that describes the failure.  There may be other errors as well
@@ -222,7 +222,7 @@ struct ub_result {
  * The readable function definition looks like:
  * void my_callback(void* my_arg, int err, struct ub_result* result);
  * It is called with
- *	void* my_arg: your pointer to a (struct of) data of your choice, 
+ *	void* my_arg: your pointer to a (struct of) data of your choice,
  *		or NULL.
  *	int err: if 0 all is OK, otherwise an error occurred and no results
  *	     are forthcoming.
@@ -301,8 +301,8 @@ int ub_ctx_set_option(struct ub_ctx* ctx, const char* opt, const char* val);
  * 	This is a power-users interface that lets you specify all sorts
  * 	of options.
  * @param str: the string is malloced and returned here. NULL on error.
- * 	The caller must free() the string.  In cases with multiple 
- * 	entries (auto-trust-anchor-file), a newline delimited list is 
+ * 	The caller must free() the string.  In cases with multiple
+ * 	entries (auto-trust-anchor-file), a newline delimited list is
  * 	returned in the string.
  * @return 0 if OK else an error code (malloc failure, syntax error).
  */
@@ -321,10 +321,10 @@ int ub_ctx_get_option(struct ub_ctx* ctx, const char* opt, char** str);
 int ub_ctx_config(struct ub_ctx* ctx, const char* fname);
 
 /**
- * Set machine to forward DNS queries to, the caching resolver to use. 
- * IP4 or IP6 address. Forwards all DNS requests to that machine, which 
- * is expected to run a recursive resolver. If the proxy is not 
- * DNSSEC-capable, validation may fail. Can be called several times, in 
+ * Set machine to forward DNS queries to, the caching resolver to use.
+ * IP4 or IP6 address. Forwards all DNS requests to that machine, which
+ * is expected to run a recursive resolver. If the proxy is not
+ * DNSSEC-capable, validation may fail. Can be called several times, in
  * that case the addresses are used as backup servers.
  *
  * To read the list of nameservers from /etc/resolv.conf (from DHCP or so),
@@ -389,7 +389,7 @@ int ub_ctx_resolvconf(struct ub_ctx* ctx, const char* fname);
 
 /**
  * Read list of hosts from the filename given.
- * Usually "/etc/hosts". 
+ * Usually "/etc/hosts".
  * These addresses are not flagged as DNSSEC secure when queried for.
  *
  * @param ctx: context.
@@ -403,7 +403,7 @@ int ub_ctx_hosts(struct ub_ctx* ctx, const char* fname);
 /**
  * Add a trust anchor to the given context.
  * The trust anchor is a string, on one line, that holds a valid DNSKEY or
- * DS RR. 
+ * DS RR.
  * @param ctx: context.
  *	At this time it is only possible to add trusted keys before the
  *	first resolve is done.
@@ -465,7 +465,7 @@ int ub_ctx_debugout(struct ub_ctx* ctx, void* out);
  * Set debug verbosity for the context
  * Output is directed to stderr.
  * @param ctx: context.
- * @param d: debug level, 0 is off, 1 is very minimal, 2 is detailed, 
+ * @param d: debug level, 0 is off, 1 is very minimal, 2 is detailed,
  *	and 3 is lots.
  * @return 0 if OK, else error.
  */
@@ -474,10 +474,10 @@ int ub_ctx_debuglevel(struct ub_ctx* ctx, int d);
 /**
  * Set a context behaviour for asynchronous action.
  * @param ctx: context.
- * @param dothread: if true, enables threading and a call to resolve_async() 
+ * @param dothread: if true, enables threading and a call to resolve_async()
  *	creates a thread to handle work in the background.
  *	If false, a process is forked to handle work in the background.
- *	Changes to this setting after async() calls have been made have 
+ *	Changes to this setting after async() calls have been made have
  *	no effect (delete and re-create the context to change).
  * @return 0 if OK, else error.
  */
@@ -495,7 +495,7 @@ int ub_poll(struct ub_ctx* ctx);
 
 /**
  * Wait for a context to finish with results. Calls ub_process() after
- * the wait for you. After the wait, there are no more outstanding 
+ * the wait for you. After the wait, there are no more outstanding
  * asynchronous queries.
  * @param ctx: context.
  * @return: 0 if OK, else error.
@@ -530,11 +530,11 @@ int ub_process(struct ub_ctx* ctx);
  * @param rrtype: type of RR in host order, 1 is A (address).
  * @param rrclass: class of RR in host order, 1 is IN (for internet).
  * @param result: the result data is returned in a newly allocated result
- * 	structure. May be NULL on return, return value is set to an error 
+ * 	structure. May be NULL on return, return value is set to an error
  * 	in that case (out of memory).
  * @return 0 if OK, else error.
  */
-int ub_resolve(struct ub_ctx* ctx, const char* name, int rrtype, 
+int ub_resolve(struct ub_ctx* ctx, const char* name, int rrtype,
 	int rrclass, struct ub_result** result);
 
 /**
@@ -561,11 +561,11 @@ int ub_resolve(struct ub_ctx* ctx, const char* name, int rrtype,
  * 	If an error happens during processing, your callback will be called
  * 	with error set to a nonzero value (and result==NULL).
  * @param async_id: if you pass a non-NULL value, an identifier number is
- *	returned for the query as it is in progress. It can be used to 
+ *	returned for the query as it is in progress. It can be used to
  *	cancel the query.
  * @return 0 if OK, else error.
  */
-int ub_resolve_async(struct ub_ctx* ctx, const char* name, int rrtype, 
+int ub_resolve_async(struct ub_ctx* ctx, const char* name, int rrtype,
 	int rrclass, void* mydata, ub_callback_type callback, int* async_id);
 
 /**
@@ -589,7 +589,7 @@ int ub_cancel(struct ub_ctx* ctx, int async_id);
  */
 void ub_resolve_free(struct ub_result* result);
 
-/** 
+/**
  * Convert error value to a human readable string.
  * @param err: error code from one of the libunbound functions.
  * 	The error codes are from the type enum ub_ctx_err.
@@ -605,7 +605,7 @@ const char* ub_strerror(int err);
 int ub_ctx_print_local_zones(struct ub_ctx* ctx);
 
 /**
- * Add a new zone with the zonetype to the local authority info of the 
+ * Add a new zone with the zonetype to the local authority info of the
  * library.
  * @param ctx: context.  Is finalized by the routine.
  * @param zone_name: name of the zone in text, "example.com"
@@ -613,7 +613,7 @@ int ub_ctx_print_local_zones(struct ub_ctx* ctx);
  * @param zone_type: type of the zone (like for unbound.conf) in text.
  * @return 0 if OK, else error.
  */
-int ub_ctx_zone_add(struct ub_ctx* ctx, const char *zone_name, 
+int ub_ctx_zone_add(struct ub_ctx* ctx, const char *zone_name,
 	const char *zone_type);
 
 /**
@@ -649,7 +649,7 @@ int ub_ctx_data_remove(struct ub_ctx* ctx, const char *data);
  */
 const char* ub_version(void);
 
-/** 
+/**
  * Some global statistics that are not in struct stats_info,
  * this struct is shared on a shm segment (shm-key in unbound.conf)
  */
@@ -695,13 +695,22 @@ struct ub_server_stats {
 	long long num_queries;
 	/** number of queries that have been dropped/ratelimited by ip. */
 	long long num_queries_ip_ratelimited;
+	/** number of queries with a valid DNS Cookie. */
+	long long num_queries_cookie_valid;
+	/** number of queries with only the client part of the DNS Cookie. */
+	long long num_queries_cookie_client;
+	/** number of queries with invalid DNS Cookie. */
+	long long num_queries_cookie_invalid;
 	/** number of queries that had a cache-miss. */
 	long long num_queries_missed_cache;
 	/** number of prefetch queries - cachehits with prefetch */
 	long long num_queries_prefetch;
-
+	/** number of queries which are too late to process */
+	long long num_queries_timed_out;
+	/** the longest wait time in the queue */
+	long long max_query_time_us;
 	/**
-	 * Sum of the querylistsize of the worker for 
+	 * Sum of the querylistsize of the worker for
 	 * every query that missed cache. To calculate average.
 	 */
 	long long sum_query_list_size;
@@ -773,12 +782,12 @@ struct ub_server_stats {
 	long long tcp_accept_usage;
 	/** expired answers served from cache */
 	long long ans_expired;
-	/** histogram data exported to array 
+	/** histogram data exported to array
 	 * if the array is the same size, no data is lost, and
 	 * if all histograms are same size (is so by default) then
 	 * adding up works well. */
 	long long hist[UB_STATS_BUCKET_NUM];
-	
+
 	/** number of message cache entries */
 	long long msg_cache_count;
 	/** number of rrset cache entries */
@@ -788,6 +797,11 @@ struct ub_server_stats {
 	/** number of key cache entries */
 	long long key_cache_count;
 
+	/** maximum number of collisions in the msg cache */
+	long long msg_cache_max_collisions;
+	/** maximum number of collisions in the rrset cache */
+	long long rrset_cache_max_collisions;
+
 	/** number of queries that used dnscrypt */
 	long long num_query_dnscrypt_crypted;
 	/** number of queries that queried dnscrypt certificates */
@@ -819,6 +833,8 @@ struct ub_server_stats {
 	/** number of queries answered from edns-subnet specific data, and
 	 * the answer was from the edns-subnet cache. */
 	long long num_query_subnet_cache;
+	/** number of queries served from cachedb */
+	long long num_query_cachedb;
 	/** number of bytes in the stream wait buffers */
 	long long mem_stream_wait;
 	/** number of bytes in the HTTP2 query buffers */
@@ -831,7 +847,7 @@ struct ub_server_stats {
 	long long rpz_action[UB_STATS_RPZ_ACTION_NUM];
 };
 
-/** 
+/**
  * Statistics to send over the control pipe when asked
  * This struct is made to be memcopied, sent in binary.
  * shm mapped with (number+1) at num_threads+1, with first as total
@@ -860,4 +876,4 @@ struct ub_stats_info {
 }
 #endif
 
-#endif /* _UB_UNBOUND_H */
+#endif /* UB_UNBOUND_H */
diff --git a/contrib/unbound/services/authzone.c b/contrib/unbound/services/authzone.c
index 0cc73416ed6f..33cbef2c742b 100644
--- a/contrib/unbound/services/authzone.c
+++ b/contrib/unbound/services/authzone.c
@@ -1306,8 +1306,8 @@ az_remove_rr(struct auth_zone* z, uint8_t* rr, size_t rr_len,
 		auth_data_delete(node);
 	}
 	if(z->rpz) {
-		rpz_remove_rr(z->rpz, z->namelen, dname, dname_len, rr_type,
-			rr_class, rdata, rdatalen);
+		rpz_remove_rr(z->rpz, z->name, z->namelen, dname, dname_len,
+			rr_type, rr_class, rdata, rdatalen);
 	}
 	return 1;
 }
@@ -5420,6 +5420,8 @@ xfr_transfer_lookup_host(struct auth_xfer* xfr, struct module_env* env)
 	edns.opt_list_out = NULL;
 	edns.opt_list_inplace_cb_out = NULL;
 	edns.padding_block_size = 0;
+	edns.cookie_present = 0;
+	edns.cookie_valid = 0;
 	if(sldns_buffer_capacity(buf) < 65535)
 		edns.udp_size = (uint16_t)sldns_buffer_capacity(buf);
 	else	edns.udp_size = 65535;
@@ -6613,6 +6615,8 @@ xfr_probe_lookup_host(struct auth_xfer* xfr, struct module_env* env)
 	edns.opt_list_out = NULL;
 	edns.opt_list_inplace_cb_out = NULL;
 	edns.padding_block_size = 0;
+	edns.cookie_present = 0;
+	edns.cookie_valid = 0;
 	if(sldns_buffer_capacity(buf) < 65535)
 		edns.udp_size = (uint16_t)sldns_buffer_capacity(buf);
 	else	edns.udp_size = 65535;
@@ -7510,7 +7514,7 @@ static void add_rrlist_rrsigs_into_data(struct packed_rrset_data* data,
 		size_t j;
 		if(!rrlist[i])
 			continue;
-		if(rrlist[i] && rrlist[i]->type == LDNS_RR_TYPE_ZONEMD &&
+		if(rrlist[i]->type == LDNS_RR_TYPE_ZONEMD &&
 			query_dname_compare(z->name, node->name)==0) {
 			/* omit RRSIGs over type ZONEMD at apex */
 			continue;
diff --git a/contrib/unbound/services/cache/dns.c b/contrib/unbound/services/cache/dns.c
index 6fc9919ef4c0..9b4ad5888721 100644
--- a/contrib/unbound/services/cache/dns.c
+++ b/contrib/unbound/services/cache/dns.c
@@ -132,31 +132,6 @@ msg_cache_remove(struct module_env* env, uint8_t* qname, size_t qnamelen,
 	slabhash_remove(env->msg_cache, h, &k);
 }
 
-/** remove servfail msg cache entry */
-static void
-msg_del_servfail(struct module_env* env, struct query_info* qinfo,
-	uint32_t flags)
-{
-	struct msgreply_entry* e;
-	/* see if the entry is servfail, and then remove it, so that
-	 * lookups move from the cacheresponse stage to the recursionresponse
-	 * stage */
-	e = msg_cache_lookup(env, qinfo->qname, qinfo->qname_len,
-		qinfo->qtype, qinfo->qclass, flags, 0, 0);
-	if(!e) return;
-	/* we don't check for the ttl here, also expired servfail entries
-	 * are removed.  If the user uses serve-expired, they would still be
-	 * used to answer from cache */
-	if(FLAGS_GET_RCODE(((struct reply_info*)e->entry.data)->flags)
-		!= LDNS_RCODE_SERVFAIL) {
-		lock_rw_unlock(&e->entry.lock);
-		return;
-	}
-	lock_rw_unlock(&e->entry.lock);
-	msg_cache_remove(env, qinfo->qname, qinfo->qname_len, qinfo->qtype,
-		qinfo->qclass, flags);
-}
-
 void 
 dns_cache_store_msg(struct module_env* env, struct query_info* qinfo,
 	hashvalue_type hash, struct reply_info* rep, time_t leeway, int pside,
@@ -182,13 +157,20 @@ dns_cache_store_msg(struct module_env* env, struct query_info* qinfo,
 		/* we do not store the message, but we did store the RRs,
 		 * which could be useful for delegation information */
 		verbose(VERB_ALGO, "TTL 0: dropped msg from cache");
-		free(rep);
-		/* if the message is SERVFAIL in cache, remove that SERVFAIL,
+		reply_info_delete(rep, NULL);
+		/* if the message is in the cache, remove that msg,
 		 * so that the TTL 0 response can be returned for future
-		 * responses (i.e. don't get answered by the servfail from
+		 * responses (i.e. don't get answered from
 		 * cache, but instead go to recursion to get this TTL0
-		 * response). */
-		msg_del_servfail(env, qinfo, flags);
+		 * response).
+		 * Possible messages that could be in the cache:
+		 * - SERVFAIL
+		 * - NXDOMAIN
+		 * - NODATA
+		 * - an older record that is expired
+		 * - an older record that did not yet expire */
+		msg_cache_remove(env, qinfo->qname, qinfo->qname_len,
+			qinfo->qtype, qinfo->qclass, flags);
 		return;
 	}
 
@@ -610,6 +592,7 @@ gen_dns_msg(struct regional* region, struct query_info* q, size_t num)
 	if(!msg->rep)
 		return NULL;
 	msg->rep->reason_bogus = LDNS_EDE_NONE;
+	msg->rep->reason_bogus_str = NULL;
 	if(num > RR_COUNT_MAX)
 		return NULL; /* integer overflow protection */
 	msg->rep->rrsets = (struct ub_packed_rrset_key**)
@@ -672,6 +655,10 @@ tomsg(struct module_env* env, struct query_info* q, struct reply_info* r,
 	msg->rep->rrset_count = r->rrset_count;
 	msg->rep->authoritative = r->authoritative;
 	msg->rep->reason_bogus = r->reason_bogus;
+	if(r->reason_bogus_str) {
+		msg->rep->reason_bogus_str = regional_strdup(region, r->reason_bogus_str);
+	}
+
 	if(!rrset_array_lock(r->ref, r->rrset_count, now_control)) {
 		return NULL;
 	}
@@ -1075,7 +1062,6 @@ dns_cache_store(struct module_env* env, struct query_info* msgqinf,
 	/* ttl must be relative ;i.e. 0..86400 not  time(0)+86400.
 	 * the env->now is added to message and RRsets in this routine. */
 	/* the leeway is used to invalidate other rrsets earlier */
-
 	if(is_referral) {
 		/* store rrsets */
 		struct rrset_ref ref;
@@ -1092,7 +1078,7 @@ dns_cache_store(struct module_env* env, struct query_info* msgqinf,
 				((ntohs(ref.key->rk.type)==LDNS_RR_TYPE_NS
 				 && !pside) ? qstarttime:*env->now + leeway));
 		}
-		free(rep);
+		reply_info_delete(rep, NULL);
 		return 1;
 	} else {
 		/* store msg, and rrsets */
diff --git a/contrib/unbound/services/cache/infra.c b/contrib/unbound/services/cache/infra.c
index 537cb949cf88..31462d13ae0a 100644
--- a/contrib/unbound/services/cache/infra.c
+++ b/contrib/unbound/services/cache/infra.c
@@ -67,6 +67,11 @@ int infra_dp_ratelimit = 0;
  *  in queries per second. */
 int infra_ip_ratelimit = 0;
 
+/** ratelimit value for client ip addresses,
+ *  in queries per second.
+ *  For clients with a valid DNS Cookie. */
+int infra_ip_ratelimit_cookie = 0;
+
 size_t 
 infra_sizefunc(void* k, void* ATTR_UNUSED(d))
 {
@@ -1051,9 +1056,50 @@ infra_get_mem(struct infra_cache* infra)
 	return s;
 }
 
+/* Returns 1 if the limit has not been exceeded, 0 otherwise. */
+static int
+check_ip_ratelimit(struct sockaddr_storage* addr, socklen_t addrlen,
+	struct sldns_buffer* buffer, int premax, int max, int has_cookie)
+{
+	int limit;
+
+	if(has_cookie) limit = infra_ip_ratelimit_cookie;
+	else           limit = infra_ip_ratelimit;
+
+	/* Disabled */
+	if(limit == 0) return 1;
+
+	if(premax <= limit && max > limit) {
+		char client_ip[128], qnm[LDNS_MAX_DOMAINLEN+1+12+12];
+		addr_to_str(addr, addrlen, client_ip, sizeof(client_ip));
+		qnm[0]=0;
+		if(sldns_buffer_limit(buffer)>LDNS_HEADER_SIZE &&
+			LDNS_QDCOUNT(sldns_buffer_begin(buffer))!=0) {
+			(void)sldns_wire2str_rrquestion_buf(
+				sldns_buffer_at(buffer, LDNS_HEADER_SIZE),
+				sldns_buffer_limit(buffer)-LDNS_HEADER_SIZE,
+				qnm, sizeof(qnm));
+			if(strlen(qnm)>0 && qnm[strlen(qnm)-1]=='\n')
+				qnm[strlen(qnm)-1] = 0; /*remove newline*/
+			if(strchr(qnm, '\t'))
+				*strchr(qnm, '\t') = ' ';
+			if(strchr(qnm, '\t'))
+				*strchr(qnm, '\t') = ' ';
+			verbose(VERB_OPS, "ip_ratelimit exceeded %s %d%s %s",
+				client_ip, limit,
+				has_cookie?"(cookie)":"", qnm);
+		} else {
+			verbose(VERB_OPS, "ip_ratelimit exceeded %s %d%s (no query name)",
+				client_ip, limit,
+				has_cookie?"(cookie)":"");
+		}
+	}
+	return (max <= limit);
+}
+
 int infra_ip_ratelimit_inc(struct infra_cache* infra,
 	struct sockaddr_storage* addr, socklen_t addrlen, time_t timenow,
-	int backoff, struct sldns_buffer* buffer)
+	int has_cookie, int backoff, struct sldns_buffer* buffer)
 {
 	int max;
 	struct lruhash_entry* entry;
@@ -1070,31 +1116,8 @@ int infra_ip_ratelimit_inc(struct infra_cache* infra,
 		(*cur)++;
 		max = infra_rate_max(entry->data, timenow, backoff);
 		lock_rw_unlock(&entry->lock);
-
-		if(premax <= infra_ip_ratelimit && max > infra_ip_ratelimit) {
-			char client_ip[128], qnm[LDNS_MAX_DOMAINLEN+1+12+12];
-			addr_to_str(addr, addrlen, client_ip, sizeof(client_ip));
-			qnm[0]=0;
-			if(sldns_buffer_limit(buffer)>LDNS_HEADER_SIZE &&
-				LDNS_QDCOUNT(sldns_buffer_begin(buffer))!=0) {
-				(void)sldns_wire2str_rrquestion_buf(
-					sldns_buffer_at(buffer, LDNS_HEADER_SIZE),
-					sldns_buffer_limit(buffer)-LDNS_HEADER_SIZE,
-					qnm, sizeof(qnm));
-				if(strlen(qnm)>0 && qnm[strlen(qnm)-1]=='\n')
-					qnm[strlen(qnm)-1] = 0; /*remove newline*/
-				if(strchr(qnm, '\t'))
-					*strchr(qnm, '\t') = ' ';
-				if(strchr(qnm, '\t'))
-					*strchr(qnm, '\t') = ' ';
-				verbose(VERB_OPS, "ip_ratelimit exceeded %s %d %s",
-					client_ip, infra_ip_ratelimit, qnm);
-			} else {
-				verbose(VERB_OPS, "ip_ratelimit exceeded %s %d (no query name)",
-					client_ip, infra_ip_ratelimit);
-			}
-		}
-		return (max <= infra_ip_ratelimit);
+		return check_ip_ratelimit(addr, addrlen, buffer, premax, max,
+			has_cookie);
 	}
 
 	/* create */
diff --git a/contrib/unbound/services/cache/infra.h b/contrib/unbound/services/cache/infra.h
index faf7fd2f30e1..525073bf35bb 100644
--- a/contrib/unbound/services/cache/infra.h
+++ b/contrib/unbound/services/cache/infra.h
@@ -153,6 +153,8 @@ struct rate_key {
 
 /** ip ratelimit, 0 is off */
 extern int infra_ip_ratelimit;
+/** ip ratelimit for DNS Cookie clients, 0 is off */
+extern int infra_ip_ratelimit_cookie;
 
 /**
  * key for ip_ratelimit lookups, a source IP.
@@ -419,13 +421,14 @@ int infra_find_ratelimit(struct infra_cache* infra, uint8_t* name,
  *  @param addr: client address
  *  @param addrlen: client address length
  *  @param timenow: what time it is now.
+ *  @param has_cookie: if the request came with a DNS Cookie.
  *  @param backoff: if backoff is enabled.
  *  @param buffer: with query for logging.
  *  @return 1 if it could be incremented. 0 if the increment overshot the
  *  ratelimit and the query should be dropped. */
 int infra_ip_ratelimit_inc(struct infra_cache* infra,
 	struct sockaddr_storage* addr, socklen_t addrlen, time_t timenow,
-	int backoff, struct sldns_buffer* buffer);
+	int has_cookie, int backoff, struct sldns_buffer* buffer);
 
 /**
  * Get memory used by the infra cache.
diff --git a/contrib/unbound/services/listen_dnsport.c b/contrib/unbound/services/listen_dnsport.c
index 95606aff5d4e..60f9b41e5f6c 100644
--- a/contrib/unbound/services/listen_dnsport.c
+++ b/contrib/unbound/services/listen_dnsport.c
@@ -4,22 +4,22 @@
  * Copyright (c) 2007, NLnet Labs. All rights reserved.
  *
  * This software is open source.
- * 
+ *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
- * 
+ *
  * Redistributions of source code must retain the above copyright notice,
  * this list of conditions and the following disclaimer.
- * 
+ *
  * Redistributions in binary form must reproduce the above copyright notice,
  * this list of conditions and the following disclaimer in the documentation
  * and/or other materials provided with the distribution.
- * 
+ *
  * Neither the name of the NLNET LABS nor the names of its contributors may
  * be used to endorse or promote products derived from this software without
  * specific prior written permission.
- * 
+ *
  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
@@ -79,9 +79,11 @@
 #ifdef HAVE_NET_IF_H
 #include <net/if.h>
 #endif
-
+#ifdef HAVE_LINUX_NET_TSTAMP_H
+#include <linux/net_tstamp.h>
+#endif
 /** number of queued TCP connections for listen() */
-#define TCP_BACKLOG 256 
+#define TCP_BACKLOG 256
 
 #ifndef THREADS_DISABLED
 /** lock on the counter of stream buffer memory */
@@ -187,7 +189,7 @@ systemd_get_activated(int family, int socktype, int listen,
 			log_err("systemd sd_listen_fds(): %s", strerror(-r));
 		return -1;
 	}
-	
+
 	for(i = 0; i < r; i++) {
 		if(sd_is_socket(SD_LISTEN_FDS_START + i, family, socktype, listen)) {
 			s = SD_LISTEN_FDS_START + i;
@@ -253,7 +255,7 @@ create_udp_sock(int family, int socktype, struct sockaddr* addr,
 			return -1;
 		}
 #else
-		if(WSAGetLastError() == WSAEAFNOSUPPORT || 
+		if(WSAGetLastError() == WSAEAFNOSUPPORT ||
 			WSAGetLastError() == WSAEPROTONOSUPPORT) {
 			*noproto = 1;
 			return -1;
@@ -270,7 +272,7 @@ create_udp_sock(int family, int socktype, struct sockaddr* addr,
 #endif
 	if(listen) {
 #ifdef SO_REUSEADDR
-		if(setsockopt(s, SOL_SOCKET, SO_REUSEADDR, (void*)&on, 
+		if(setsockopt(s, SOL_SOCKET, SO_REUSEADDR, (void*)&on,
 			(socklen_t)sizeof(on)) < 0) {
 			log_err("setsockopt(.. SO_REUSEADDR ..) failed: %s",
 				sock_strerror(errno));
@@ -368,9 +370,9 @@ create_udp_sock(int family, int socktype, struct sockaddr* addr,
 		socklen_t slen = (socklen_t)sizeof(got);
 #  ifdef SO_RCVBUFFORCE
 		/* Linux specific: try to use root permission to override
-		 * system limits on rcvbuf. The limit is stored in 
+		 * system limits on rcvbuf. The limit is stored in
 		 * /proc/sys/net/core/rmem_max or sysctl net.core.rmem_max */
-		if(setsockopt(s, SOL_SOCKET, SO_RCVBUFFORCE, (void*)&rcv, 
+		if(setsockopt(s, SOL_SOCKET, SO_RCVBUFFORCE, (void*)&rcv,
 			(socklen_t)sizeof(rcv)) < 0) {
 			if(errno != EPERM) {
 				log_err("setsockopt(..., SO_RCVBUFFORCE, "
@@ -381,7 +383,7 @@ create_udp_sock(int family, int socktype, struct sockaddr* addr,
 				return -1;
 			}
 #  endif /* SO_RCVBUFFORCE */
-			if(setsockopt(s, SOL_SOCKET, SO_RCVBUF, (void*)&rcv, 
+			if(setsockopt(s, SOL_SOCKET, SO_RCVBUF, (void*)&rcv,
 				(socklen_t)sizeof(rcv)) < 0) {
 				log_err("setsockopt(..., SO_RCVBUF, "
 					"...) failed: %s", sock_strerror(errno));
@@ -392,7 +394,7 @@ create_udp_sock(int family, int socktype, struct sockaddr* addr,
 			}
 			/* check if we got the right thing or if system
 			 * reduced to some system max.  Warn if so */
-			if(getsockopt(s, SOL_SOCKET, SO_RCVBUF, (void*)&got, 
+			if(getsockopt(s, SOL_SOCKET, SO_RCVBUF, (void*)&got,
 				&slen) >= 0 && got < rcv/2) {
 				log_warn("so-rcvbuf %u was not granted. "
 					"Got %u. To fix: start with "
@@ -413,9 +415,9 @@ create_udp_sock(int family, int socktype, struct sockaddr* addr,
 		socklen_t slen = (socklen_t)sizeof(got);
 #  ifdef SO_SNDBUFFORCE
 		/* Linux specific: try to use root permission to override
-		 * system limits on sndbuf. The limit is stored in 
+		 * system limits on sndbuf. The limit is stored in
 		 * /proc/sys/net/core/wmem_max or sysctl net.core.wmem_max */
-		if(setsockopt(s, SOL_SOCKET, SO_SNDBUFFORCE, (void*)&snd, 
+		if(setsockopt(s, SOL_SOCKET, SO_SNDBUFFORCE, (void*)&snd,
 			(socklen_t)sizeof(snd)) < 0) {
 			if(errno != EPERM) {
 				log_err("setsockopt(..., SO_SNDBUFFORCE, "
@@ -426,7 +428,7 @@ create_udp_sock(int family, int socktype, struct sockaddr* addr,
 				return -1;
 			}
 #  endif /* SO_SNDBUFFORCE */
-			if(setsockopt(s, SOL_SOCKET, SO_SNDBUF, (void*)&snd, 
+			if(setsockopt(s, SOL_SOCKET, SO_SNDBUF, (void*)&snd,
 				(socklen_t)sizeof(snd)) < 0) {
 				log_err("setsockopt(..., SO_SNDBUF, "
 					"...) failed: %s", sock_strerror(errno));
@@ -437,7 +439,7 @@ create_udp_sock(int family, int socktype, struct sockaddr* addr,
 			}
 			/* check if we got the right thing or if system
 			 * reduced to some system max.  Warn if so */
-			if(getsockopt(s, SOL_SOCKET, SO_SNDBUF, (void*)&got, 
+			if(getsockopt(s, SOL_SOCKET, SO_SNDBUF, (void*)&got,
 				&slen) >= 0 && got < snd/2) {
 				log_warn("so-sndbuf %u was not granted. "
 					"Got %u. To fix: start with "
@@ -469,7 +471,7 @@ create_udp_sock(int family, int socktype, struct sockaddr* addr,
 #   endif
 			) {
 			int val=(v6only==2)?0:1;
-			if (setsockopt(s, IPPROTO_IPV6, IPV6_V6ONLY, 
+			if (setsockopt(s, IPPROTO_IPV6, IPV6_V6ONLY,
 				(void*)&val, (socklen_t)sizeof(val)) < 0) {
 				log_err("setsockopt(..., IPV6_V6ONLY"
 					", ...) failed: %s", sock_strerror(errno));
@@ -576,7 +578,7 @@ create_udp_sock(int family, int socktype, struct sockaddr* addr,
 		int action;
 #   if defined(IP_PMTUDISC_OMIT)
 		action = IP_PMTUDISC_OMIT;
-		if (setsockopt(s, IPPROTO_IP, IP_MTU_DISCOVER, 
+		if (setsockopt(s, IPPROTO_IP, IP_MTU_DISCOVER,
 			&action, (socklen_t)sizeof(action)) < 0) {
 
 			if (errno != EINVAL) {
@@ -609,7 +611,7 @@ create_udp_sock(int family, int socktype, struct sockaddr* addr,
 		/* the IP_DONTFRAG option if defined in the 11.0 OSX headers,
 		 * but does not work on that version, so we exclude it */
 		int off = 0;
-		if (setsockopt(s, IPPROTO_IP, IP_DONTFRAG, 
+		if (setsockopt(s, IPPROTO_IP, IP_DONTFRAG,
 			&off, (socklen_t)sizeof(off)) < 0) {
 			log_err("setsockopt(..., IP_DONTFRAG, ...) failed: %s",
 				strerror(errno));
@@ -647,7 +649,7 @@ create_udp_sock(int family, int socktype, struct sockaddr* addr,
 		if(WSAGetLastError() != WSAEADDRINUSE &&
 			WSAGetLastError() != WSAEADDRNOTAVAIL &&
 			!(WSAGetLastError() == WSAEACCES && verbosity < 4 && !listen)) {
-			log_err_addr("can't bind socket", 
+			log_err_addr("can't bind socket",
 				wsa_strerror(WSAGetLastError()),
 				(struct sockaddr_storage*)addr, addrlen);
 		}
@@ -749,7 +751,7 @@ create_tcp_accept_sock(struct addrinfo *addr, int v6only, int* noproto,
     }
 #endif
 #ifdef SO_REUSEADDR
-	if(setsockopt(s, SOL_SOCKET, SO_REUSEADDR, (void*)&on, 
+	if(setsockopt(s, SOL_SOCKET, SO_REUSEADDR, (void*)&on,
 		(socklen_t)sizeof(on)) < 0) {
 		log_err("setsockopt(.. SO_REUSEADDR ..) failed: %s",
 			sock_strerror(errno));
@@ -793,7 +795,7 @@ create_tcp_accept_sock(struct addrinfo *addr, int v6only, int* noproto,
 		&& !got_fd_from_systemd
 #  endif
 		) {
-		if(setsockopt(s, IPPROTO_IPV6, IPV6_V6ONLY, 
+		if(setsockopt(s, IPPROTO_IPV6, IPV6_V6ONLY,
 			(void*)&on, (socklen_t)sizeof(on)) < 0) {
 			log_err("setsockopt(..., IPV6_V6ONLY, ...) failed: %s",
 				sock_strerror(errno));
@@ -845,7 +847,7 @@ create_tcp_accept_sock(struct addrinfo *addr, int v6only, int* noproto,
 				addr->ai_addrlen);
 		}
 #else
-		log_err_addr("can't bind socket", 
+		log_err_addr("can't bind socket",
 			wsa_strerror(WSAGetLastError()),
 			(struct sockaddr_storage*)addr->ai_addr,
 			addr->ai_addrlen);
@@ -873,7 +875,7 @@ create_tcp_accept_sock(struct addrinfo *addr, int v6only, int* noproto,
 	/* 5 is recommended on linux */
 	qlen = 5;
 #endif
-	if ((setsockopt(s, IPPROTO_TCP, TCP_FASTOPEN, &qlen, 
+	if ((setsockopt(s, IPPROTO_TCP, TCP_FASTOPEN, &qlen,
 		  sizeof(qlen))) == -1 ) {
 #ifdef ENOPROTOOPT
 		/* squelch ENOPROTOOPT: freebsd server mode with kernel support
@@ -999,7 +1001,7 @@ err:
  * Create socket from getaddrinfo results
  */
 static int
-make_sock(int stype, const char* ifname, const char* port, 
+make_sock(int stype, const char* ifname, const char* port,
 	struct addrinfo *hints, int v6only, int* noip6, size_t rcv, size_t snd,
 	int* reuseport, int transparent, int tcp_mss, int nodelay, int freebind,
 	int use_systemd, int dscp, struct unbound_socket* ub_sock)
@@ -1015,10 +1017,10 @@ make_sock(int stype, const char* ifname, const char* port,
 			return -1;
 		}
 #endif
-		log_err("node %s:%s getaddrinfo: %s %s", 
+		log_err("node %s:%s getaddrinfo: %s %s",
 			ifname?ifname:"default", port, gai_strerror(r),
 #ifdef EAI_SYSTEM
-			r==EAI_SYSTEM?(char*)strerror(errno):""
+			(r==EAI_SYSTEM?(char*)strerror(errno):"")
 #else
 			""
 #endif
@@ -1055,7 +1057,7 @@ make_sock(int stype, const char* ifname, const char* port,
 
 /** make socket and first see if ifname contains port override info */
 static int
-make_sock_port(int stype, const char* ifname, const char* port, 
+make_sock_port(int stype, const char* ifname, const char* port,
 	struct addrinfo *hints, int v6only, int* noip6, size_t rcv, size_t snd,
 	int* reuseport, int transparent, int tcp_mss, int nodelay, int freebind,
 	int use_systemd, int dscp, struct unbound_socket* ub_sock)
@@ -1114,9 +1116,28 @@ port_insert(struct listen_port** list, int s, enum listen_type ftype,
 	return 1;
 }
 
+/** set fd to receive software timestamps */
+static int
+set_recvtimestamp(int s)
+{
+#ifdef HAVE_LINUX_NET_TSTAMP_H
+	int opt = SOF_TIMESTAMPING_RX_SOFTWARE | SOF_TIMESTAMPING_SOFTWARE;
+	if (setsockopt(s, SOL_SOCKET, SO_TIMESTAMPNS, (void*)&opt, (socklen_t)sizeof(opt)) < 0) {
+		log_err("setsockopt(..., SO_TIMESTAMPNS, ...) failed: %s",
+			strerror(errno));
+		return 0;
+	}
+	return 1;
+#else
+	log_err("packets timestamping is not supported on this platform");
+	(void)s;
+	return 0;
+#endif
+}
+
 /** set fd to receive source address packet info */
 static int
-set_recvpktinfo(int s, int family) 
+set_recvpktinfo(int s, int family)
 {
 #if defined(IPV6_RECVPKTINFO) || defined(IPV6_PKTINFO) || (defined(IP_RECVDSTADDR) && defined(IP_SENDSRCADDR)) || defined(IP_PKTINFO)
 	int on = 1;
@@ -1214,6 +1235,9 @@ if_is_ssl(const char* ifname, const char* port, int ssl_port,
  * @param use_systemd: if true, fetch sockets from systemd.
  * @param dnscrypt_port: dnscrypt service port number
  * @param dscp: DSCP to use.
+ * @param sock_queue_timeout: the sock_queue_timeout from config. Seconds to
+ * 	wait to discard if UDP packets have waited for long in the socket
+ * 	buffer.
  * @return: returns false on error.
  */
 static int
@@ -1223,7 +1247,8 @@ ports_create_if(const char* ifname, int do_auto, int do_udp, int do_tcp,
 	struct config_strlist* tls_additional_port, int https_port,
 	struct config_strlist* proxy_protocol_port,
 	int* reuseport, int transparent, int tcp_mss, int freebind,
-	int http2_nodelay, int use_systemd, int dnscrypt_port, int dscp)
+	int http2_nodelay, int use_systemd, int dnscrypt_port, int dscp,
+	int sock_queue_timeout)
 {
 	int s, noip6=0;
 	int is_https = if_is_https(ifname, port, https_port);
@@ -1252,7 +1277,8 @@ ports_create_if(const char* ifname, int do_auto, int do_udp, int do_tcp,
 		if((s = make_sock_port(SOCK_DGRAM, ifname, port, hints, 1,
 			&noip6, rcv, snd, reuseport, transparent,
 			tcp_mss, nodelay, freebind, use_systemd, dscp, ub_sock)) == -1) {
-			freeaddrinfo(ub_sock->addr);
+			if(ub_sock->addr)
+				freeaddrinfo(ub_sock->addr);
 			free(ub_sock);
 			if(noip6) {
 				log_warn("IPv6 protocol not available");
@@ -1263,15 +1289,20 @@ ports_create_if(const char* ifname, int do_auto, int do_udp, int do_tcp,
 		/* getting source addr packet info is highly non-portable */
 		if(!set_recvpktinfo(s, hints->ai_family)) {
 			sock_close(s);
-			freeaddrinfo(ub_sock->addr);
+			if(ub_sock->addr)
+				freeaddrinfo(ub_sock->addr);
 			free(ub_sock);
 			return 0;
 		}
+		if (sock_queue_timeout && !set_recvtimestamp(s)) {
+			log_warn("socket timestamping is not available");
+		}
 		if(!port_insert(list, s, is_dnscrypt
 			?listen_type_udpancil_dnscrypt:listen_type_udpancil,
 			is_pp2, ub_sock)) {
 			sock_close(s);
-			freeaddrinfo(ub_sock->addr);
+			if(ub_sock->addr)
+				freeaddrinfo(ub_sock->addr);
 			free(ub_sock);
 			return 0;
 		}
@@ -1283,7 +1314,8 @@ ports_create_if(const char* ifname, int do_auto, int do_udp, int do_tcp,
 		if((s = make_sock_port(SOCK_DGRAM, ifname, port, hints, 1,
 			&noip6, rcv, snd, reuseport, transparent,
 			tcp_mss, nodelay, freebind, use_systemd, dscp, ub_sock)) == -1) {
-			freeaddrinfo(ub_sock->addr);
+			if(ub_sock->addr)
+				freeaddrinfo(ub_sock->addr);
 			free(ub_sock);
 			if(noip6) {
 				log_warn("IPv6 protocol not available");
@@ -1291,11 +1323,15 @@ ports_create_if(const char* ifname, int do_auto, int do_udp, int do_tcp,
 			}
 			return 0;
 		}
+		if (sock_queue_timeout && !set_recvtimestamp(s)) {
+			log_warn("socket timestamping is not available");
+		}
 		if(!port_insert(list, s, is_dnscrypt
 			?listen_type_udp_dnscrypt:listen_type_udp,
 			is_pp2, ub_sock)) {
 			sock_close(s);
-			freeaddrinfo(ub_sock->addr);
+			if(ub_sock->addr)
+				freeaddrinfo(ub_sock->addr);
 			free(ub_sock);
 			return 0;
 		}
@@ -1318,7 +1354,8 @@ ports_create_if(const char* ifname, int do_auto, int do_udp, int do_tcp,
 		if((s = make_sock_port(SOCK_STREAM, ifname, port, hints, 1,
 			&noip6, 0, 0, reuseport, transparent, tcp_mss, nodelay,
 			freebind, use_systemd, dscp, ub_sock)) == -1) {
-			freeaddrinfo(ub_sock->addr);
+			if(ub_sock->addr)
+				freeaddrinfo(ub_sock->addr);
 			free(ub_sock);
 			if(noip6) {
 				/*log_warn("IPv6 protocol not available");*/
@@ -1330,7 +1367,8 @@ ports_create_if(const char* ifname, int do_auto, int do_udp, int do_tcp,
 			verbose(VERB_ALGO, "setup TCP for SSL service");
 		if(!port_insert(list, s, port_type, is_pp2, ub_sock)) {
 			sock_close(s);
-			freeaddrinfo(ub_sock->addr);
+			if(ub_sock->addr)
+				freeaddrinfo(ub_sock->addr);
 			free(ub_sock);
 			return 0;
 		}
@@ -1338,7 +1376,7 @@ ports_create_if(const char* ifname, int do_auto, int do_udp, int do_tcp,
 	return 1;
 }
 
-/** 
+/**
  * Add items to commpoint list in front.
  * @param c: commpoint to add.
  * @param front: listen struct.
@@ -1389,7 +1427,7 @@ void listen_desetup_locks(void)
 	}
 }
 
-struct listen_dnsport* 
+struct listen_dnsport*
 listen_create(struct comm_base* base, struct listen_port* ports,
 	size_t bufsize, int tcp_accept_count, int tcp_idle_timeout,
 	int harden_large_queries, uint32_t http_max_streams,
@@ -1525,10 +1563,10 @@ listen_list_delete(struct listen_list* list)
 	}
 }
 
-void 
+void
 listen_delete(struct listen_dnsport* front)
 {
-	if(!front) 
+	if(!front)
 		return;
 	listen_list_delete(front->cps);
 #ifdef USE_DNSCRYPT
@@ -1802,7 +1840,7 @@ listening_ports_open(struct config_file* cfg, char** ifs, int num_ifs,
 						reuseport, cfg->ip_transparent,
 						cfg->tcp_mss, cfg->ip_freebind,
 						cfg->http_nodelay, cfg->use_systemd,
-						cfg->dnscrypt_port, cfg->ip_dscp)) {
+						cfg->dnscrypt_port, cfg->ip_dscp, cfg->sock_queue_timeout)) {
 						listening_ports_free(list);
 						return NULL;
 					}
@@ -1819,7 +1857,7 @@ listening_ports_open(struct config_file* cfg, char** ifs, int num_ifs,
 						reuseport, cfg->ip_transparent,
 						cfg->tcp_mss, cfg->ip_freebind,
 						cfg->http_nodelay, cfg->use_systemd,
-						cfg->dnscrypt_port, cfg->ip_dscp)) {
+						cfg->dnscrypt_port, cfg->ip_dscp, cfg->sock_queue_timeout)) {
 						listening_ports_free(list);
 						return NULL;
 					}
@@ -1838,7 +1876,7 @@ listening_ports_open(struct config_file* cfg, char** ifs, int num_ifs,
 				reuseport, cfg->ip_transparent,
 				cfg->tcp_mss, cfg->ip_freebind,
 				cfg->http_nodelay, cfg->use_systemd,
-				cfg->dnscrypt_port, cfg->ip_dscp)) {
+				cfg->dnscrypt_port, cfg->ip_dscp, cfg->sock_queue_timeout)) {
 				listening_ports_free(list);
 				return NULL;
 			}
@@ -1854,7 +1892,7 @@ listening_ports_open(struct config_file* cfg, char** ifs, int num_ifs,
 				reuseport, cfg->ip_transparent,
 				cfg->tcp_mss, cfg->ip_freebind,
 				cfg->http_nodelay, cfg->use_systemd,
-				cfg->dnscrypt_port, cfg->ip_dscp)) {
+				cfg->dnscrypt_port, cfg->ip_dscp, cfg->sock_queue_timeout)) {
 				listening_ports_free(list);
 				return NULL;
 			}
@@ -1872,7 +1910,7 @@ listening_ports_open(struct config_file* cfg, char** ifs, int num_ifs,
 				reuseport, cfg->ip_transparent,
 				cfg->tcp_mss, cfg->ip_freebind,
 				cfg->http_nodelay, cfg->use_systemd,
-				cfg->dnscrypt_port, cfg->ip_dscp)) {
+				cfg->dnscrypt_port, cfg->ip_dscp, cfg->sock_queue_timeout)) {
 				listening_ports_free(list);
 				return NULL;
 			}
@@ -1888,7 +1926,7 @@ listening_ports_open(struct config_file* cfg, char** ifs, int num_ifs,
 				reuseport, cfg->ip_transparent,
 				cfg->tcp_mss, cfg->ip_freebind,
 				cfg->http_nodelay, cfg->use_systemd,
-				cfg->dnscrypt_port, cfg->ip_dscp)) {
+				cfg->dnscrypt_port, cfg->ip_dscp, cfg->sock_queue_timeout)) {
 				listening_ports_free(list);
 				return NULL;
 			}
@@ -1908,7 +1946,8 @@ void listening_ports_free(struct listen_port* list)
 		}
 		/* rc_ports don't have ub_socket */
 		if(list->socket) {
-			freeaddrinfo(list->socket->addr);
+			if(list->socket->addr)
+				freeaddrinfo(list->socket->addr);
 			free(list->socket);
 		}
 		free(list);
@@ -1919,8 +1958,8 @@ void listening_ports_free(struct listen_port* list)
 size_t listen_get_mem(struct listen_dnsport* listen)
 {
 	struct listen_list* p;
-	size_t s = sizeof(*listen) + sizeof(*listen->base) + 
-		sizeof(*listen->udp_buff) + 
+	size_t s = sizeof(*listen) + sizeof(*listen->base) +
+		sizeof(*listen->udp_buff) +
 		sldns_buffer_capacity(listen->udp_buff);
 #ifdef USE_DNSCRYPT
 	s += sizeof(*listen->dnscrypt_udp_buff);
@@ -2001,7 +2040,7 @@ void tcp_req_info_clear(struct tcp_req_info* req)
 	}
 	req->open_req_list = NULL;
 	req->num_open_req = 0;
-	
+
 	/* free pending writable result packets */
 	item = req->done_req_list;
 	while(item) {
@@ -2060,7 +2099,7 @@ tcp_req_info_setup_listen(struct tcp_req_info* req)
 		wr = 1;
 	if(!req->read_is_closed)
 		rd = 1;
-	
+
 	if(wr) {
 		req->cp->tcp_is_reading = 0;
 		comm_point_stop_listening(req->cp);
@@ -2196,7 +2235,7 @@ tcp_req_info_handle_readdone(struct tcp_req_info* req)
 	}
 	req->in_worker_handle = 0;
 	/* it should be waiting in the mesh for recursion.
-	 * If mesh failed to add a new entry and called commpoint_drop_reply. 
+	 * If mesh failed to add a new entry and called commpoint_drop_reply.
 	 * Then the mesh state has been cleared. */
 	if(req->is_drop) {
 		/* the reply has been dropped, stream has been closed. */
@@ -2256,7 +2295,7 @@ tcp_req_info_add_result(struct tcp_req_info* req, uint8_t* buf, size_t len)
 	last = req->done_req_list;
 	while(last && last->next)
 		last = last->next;
-	
+
 	/* create new element */
 	item = (struct tcp_req_done_item*)malloc(sizeof(*item));
 	if(!item) {
@@ -2615,7 +2654,7 @@ static int http2_query_read_done(struct http2_session* h2_session,
 			"buffer already assigned to stream");
 		return -1;
 	}
-    
+
     /* the c->buffer might be used by mesh_send_reply and no be cleard
 	 * need to be cleared before use */
 	sldns_buffer_clear(h2_session->c->buffer);
diff --git a/contrib/unbound/services/localzone.c b/contrib/unbound/services/localzone.c
index 3536b7aaa91b..44da22d785d9 100644
--- a/contrib/unbound/services/localzone.c
+++ b/contrib/unbound/services/localzone.c
@@ -1308,6 +1308,7 @@ local_encode(struct query_info* qinfo, struct module_env* env,
 	else	rep.ns_numrrsets = 1;
 	rep.rrset_count = 1;
 	rep.rrsets = &rrset;
+	rep.reason_bogus = LDNS_EDE_NONE;
 	udpsize = edns->udp_size;
 	edns->edns_version = EDNS_ADVERTISED_VERSION;
 	edns->udp_size = EDNS_ADVERTISED_SIZE;
@@ -1603,7 +1604,7 @@ local_zone_does_not_cover(struct local_zone* z, struct query_info* qinfo,
 	struct local_data key;
 	struct local_data* ld = NULL;
 	struct local_rrset* lr = NULL;
-	if(z->type == local_zone_always_transparent)
+	if(z->type == local_zone_always_transparent || z->type == local_zone_block_a)
 		return 1;
 	if(z->type != local_zone_transparent
 		&& z->type != local_zone_typetransparent
@@ -1680,6 +1681,16 @@ local_zones_zone_answer(struct local_zone* z, struct module_env* env,
 		|| lz_type == local_zone_always_transparent) {
 		/* no NODATA or NXDOMAINS for this zone type */
 		return 0;
+	} else if(lz_type == local_zone_block_a) {
+		/* Return NODATA for all A queries */
+		if(qinfo->qtype == LDNS_RR_TYPE_A) {
+			local_error_encode(qinfo, env, edns, repinfo, buf, temp,
+				LDNS_RCODE_NOERROR, (LDNS_RCODE_NOERROR|BIT_AA),
+				LDNS_EDE_NONE, NULL);
+				return 1;
+		}
+
+		return 0;
 	} else if(lz_type == local_zone_always_null) {
 		/* 0.0.0.0 or ::0 or noerror/nodata for this zone type,
 		 * used for blocklists. */
@@ -1846,7 +1857,8 @@ local_zones_answer(struct local_zones* zones, struct module_env* env,
 		if(z && (lzt == local_zone_transparent ||
 			lzt == local_zone_typetransparent ||
 			lzt == local_zone_inform ||
-			lzt == local_zone_always_transparent) &&
+			lzt == local_zone_always_transparent ||
+			lzt == local_zone_block_a) &&
 			local_zone_does_not_cover(z, qinfo, labs)) {
 			lock_rw_unlock(&z->lock);
 			z = NULL;
@@ -1894,6 +1906,7 @@ local_zones_answer(struct local_zones* zones, struct module_env* env,
 
 	if(lzt != local_zone_always_refuse
 		&& lzt != local_zone_always_transparent
+		&& lzt != local_zone_block_a
 		&& lzt != local_zone_always_nxdomain
 		&& lzt != local_zone_always_nodata
 		&& lzt != local_zone_always_deny
@@ -1924,6 +1937,7 @@ const char* local_zone_type2str(enum localzone_type t)
 		case local_zone_inform_deny: return "inform_deny";
 		case local_zone_inform_redirect: return "inform_redirect";
 		case local_zone_always_transparent: return "always_transparent";
+		case local_zone_block_a: return "block_a";
 		case local_zone_always_refuse: return "always_refuse";
 		case local_zone_always_nxdomain: return "always_nxdomain";
 		case local_zone_always_nodata: return "always_nodata";
@@ -1958,6 +1972,8 @@ int local_zone_str2type(const char* type, enum localzone_type* t)
 		*t = local_zone_inform_redirect;
 	else if(strcmp(type, "always_transparent") == 0)
 		*t = local_zone_always_transparent;
+	else if(strcmp(type, "block_a") == 0)
+		*t = local_zone_block_a;
 	else if(strcmp(type, "always_refuse") == 0)
 		*t = local_zone_always_refuse;
 	else if(strcmp(type, "always_nxdomain") == 0)
diff --git a/contrib/unbound/services/localzone.h b/contrib/unbound/services/localzone.h
index 19534f7509ed..4456893ee112 100644
--- a/contrib/unbound/services/localzone.h
+++ b/contrib/unbound/services/localzone.h
@@ -88,6 +88,8 @@ enum localzone_type {
 	local_zone_inform_redirect,
 	/** resolve normally, even when there is local data */	
 	local_zone_always_transparent,
+	/** resolve normally, even when there is local data but return NODATA for A queries */
+	local_zone_block_a,
 	/** answer with error, even when there is local data */	
 	local_zone_always_refuse,
 	/** answer with nxdomain, even when there is local data */
diff --git a/contrib/unbound/services/mesh.c b/contrib/unbound/services/mesh.c
index 9007b6e08c32..52d14a2d1f54 100644
--- a/contrib/unbound/services/mesh.c
+++ b/contrib/unbound/services/mesh.c
@@ -4,22 +4,22 @@
  * Copyright (c) 2007, NLnet Labs. All rights reserved.
  *
  * This software is open source.
- * 
+ *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
- * 
+ *
  * Redistributions of source code must retain the above copyright notice,
  * this list of conditions and the following disclaimer.
- * 
+ *
  * Redistributions in binary form must reproduce the above copyright notice,
  * this list of conditions and the following disclaimer in the documentation
  * and/or other materials provided with the distribution.
- * 
+ *
  * Neither the name of the NLNET LABS nor the names of its contributors may
  * be used to endorse or promote products derived from this software without
  * specific prior written permission.
- * 
+ *
  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
@@ -63,82 +63,13 @@
 #include "util/data/dname.h"
 #include "respip/respip.h"
 #include "services/listen_dnsport.h"
+#include "util/timeval_func.h"
 
 #ifdef CLIENT_SUBNET
 #include "edns-subnet/subnetmod.h"
 #include "edns-subnet/edns-subnet.h"
 #endif
 
-/** subtract timers and the values do not overflow or become negative */
-static void
-timeval_subtract(struct timeval* d, const struct timeval* end, const struct timeval* start)
-{
-#ifndef S_SPLINT_S
-	time_t end_usec = end->tv_usec;
-	d->tv_sec = end->tv_sec - start->tv_sec;
-	if(end_usec < start->tv_usec) {
-		end_usec += 1000000;
-		d->tv_sec--;
-	}
-	d->tv_usec = end_usec - start->tv_usec;
-#endif
-}
-
-/** add timers and the values do not overflow or become negative */
-static void
-timeval_add(struct timeval* d, const struct timeval* add)
-{
-#ifndef S_SPLINT_S
-	d->tv_sec += add->tv_sec;
-	d->tv_usec += add->tv_usec;
-	if(d->tv_usec >= 1000000 ) {
-		d->tv_usec -= 1000000;
-		d->tv_sec++;
-	}
-#endif
-}
-
-/** divide sum of timers to get average */
-static void
-timeval_divide(struct timeval* avg, const struct timeval* sum, size_t d)
-{
-#ifndef S_SPLINT_S
-	size_t leftover;
-	if(d <= 0) {
-		avg->tv_sec = 0;
-		avg->tv_usec = 0;
-		return;
-	}
-	avg->tv_sec = sum->tv_sec / d;
-	avg->tv_usec = sum->tv_usec / d;
-	/* handle fraction from seconds divide */
-	leftover = sum->tv_sec - avg->tv_sec*d;
-	if(leftover <= 0)
-		leftover = 0;
-	avg->tv_usec += (((long long)leftover)*((long long)1000000))/d;
-	if(avg->tv_sec < 0)
-		avg->tv_sec = 0;
-	if(avg->tv_usec < 0)
-		avg->tv_usec = 0;
-#endif
-}
-
-/** histogram compare of time values */
-static int
-timeval_smaller(const struct timeval* x, const struct timeval* y)
-{
-#ifndef S_SPLINT_S
-	if(x->tv_sec < y->tv_sec)
-		return 1;
-	else if(x->tv_sec == y->tv_sec) {
-		if(x->tv_usec <= y->tv_usec)
-			return 1;
-		else	return 0;
-	}
-	else	return 0;
-#endif
-}
-
 /**
  * Compare two response-ip client info entries for the purpose of mesh state
  * compare.  It returns 0 if ci_a and ci_b are considered equal; otherwise
@@ -249,7 +180,7 @@ mesh_state_ref_compare(const void* ap, const void* bp)
 	return mesh_state_compare(a->s, b->s);
 }
 
-struct mesh_area* 
+struct mesh_area*
 mesh_create(struct module_stack* stack, struct module_env* env)
 {
 	struct mesh_area* mesh = calloc(1, sizeof(struct mesh_area));
@@ -275,6 +206,7 @@ mesh_create(struct module_stack* stack, struct module_env* env)
 	mesh->stats_jostled = 0;
 	mesh->stats_dropped = 0;
 	mesh->ans_expired = 0;
+	mesh->ans_cachedb = 0;
 	mesh->max_reply_states = env->cfg->num_queries_per_thread;
 	mesh->max_forever_states = (mesh->max_reply_states+1)/2;
 #ifndef S_SPLINT_S
@@ -298,7 +230,7 @@ mesh_delete_helper(rbnode_type* n)
 	 * traversal and rbtree rebalancing do not work together */
 }
 
-void 
+void
 mesh_delete(struct mesh_area* mesh)
 {
 	if(!mesh)
@@ -341,7 +273,7 @@ int mesh_make_new_space(struct mesh_area* mesh, sldns_buffer* qbuf)
 	if(m && m->reply_list && m->list_select == mesh_jostle_list) {
 		/* how old is it? */
 		struct timeval age;
-		timeval_subtract(&age, mesh->env->now_tv, 
+		timeval_subtract(&age, mesh->env->now_tv,
 			&m->reply_list->start_time);
 		if(timeval_smaller(&mesh->jostle_max, &age)) {
 			/* its a goner */
@@ -517,6 +449,8 @@ void mesh_new_client(struct mesh_area* mesh, struct query_info* qinfo,
 			comm_point_send_reply(rep);
 			return;
 		}
+		/* set detached (it is now) */
+		mesh->num_detached_states++;
 		if(unique)
 			mesh_state_make_unique(s);
 		s->s.rpz_passthru = rpz_passthru;
@@ -525,13 +459,14 @@ void mesh_new_client(struct mesh_area* mesh, struct query_info* qinfo,
 			s->s.edns_opts_front_in = edns_opt_copy_region(edns->opt_list_in,
 				s->s.region);
 			if(!s->s.edns_opts_front_in) {
-				log_err("mesh_state_create: out of memory; SERVFAIL");
+				log_err("edns_opt_copy_region: out of memory; SERVFAIL");
 				if(!inplace_cb_reply_servfail_call(mesh->env, qinfo, NULL,
 					NULL, LDNS_RCODE_SERVFAIL, edns, rep, mesh->env->scratch, mesh->env->now_tv))
 						edns->opt_list_inplace_cb_out = NULL;
 				error_encode(r_buffer, LDNS_RCODE_SERVFAIL,
 					qinfo, qid, qflags, edns);
 				comm_point_send_reply(rep);
+				mesh_state_delete(&s->s);
 				return;
 			}
 		}
@@ -543,8 +478,6 @@ void mesh_new_client(struct mesh_area* mesh, struct query_info* qinfo,
 #endif
 		rbtree_insert(&mesh->all, &s->node);
 		log_assert(n != NULL);
-		/* set detached (it is now) */
-		mesh->num_detached_states++;
 		added = 1;
 	}
 	if(!s->reply_list && !s->cb_list) {
@@ -585,11 +518,11 @@ void mesh_new_client(struct mesh_area* mesh, struct query_info* qinfo,
 		/* move to either the forever or the jostle_list */
 		if(mesh->num_forever_states < mesh->max_forever_states) {
 			mesh->num_forever_states ++;
-			mesh_list_insert(s, &mesh->forever_first, 
+			mesh_list_insert(s, &mesh->forever_first,
 				&mesh->forever_last);
 			s->list_select = mesh_forever_list;
 		} else {
-			mesh_list_insert(s, &mesh->jostle_first, 
+			mesh_list_insert(s, &mesh->jostle_first,
 				&mesh->jostle_last);
 			s->list_select = mesh_jostle_list;
 		}
@@ -610,9 +543,9 @@ servfail_mem:
 	return;
 }
 
-int 
+int
 mesh_new_callback(struct mesh_area* mesh, struct query_info* qinfo,
-	uint16_t qflags, struct edns_data* edns, sldns_buffer* buf, 
+	uint16_t qflags, struct edns_data* edns, sldns_buffer* buf,
 	uint16_t qid, mesh_cb_func_type cb, void* cb_arg, int rpz_passthru)
 {
 	struct mesh_state* s = NULL;
@@ -637,6 +570,8 @@ mesh_new_callback(struct mesh_area* mesh, struct query_info* qinfo,
 		if(!s) {
 			return 0;
 		}
+		/* set detached (it is now) */
+		mesh->num_detached_states++;
 		if(unique)
 			mesh_state_make_unique(s);
 		s->s.rpz_passthru = rpz_passthru;
@@ -644,6 +579,7 @@ mesh_new_callback(struct mesh_area* mesh, struct query_info* qinfo,
 			s->s.edns_opts_front_in = edns_opt_copy_region(edns->opt_list_in,
 				s->s.region);
 			if(!s->s.edns_opts_front_in) {
+				mesh_state_delete(&s->s);
 				return 0;
 			}
 		}
@@ -654,8 +590,6 @@ mesh_new_callback(struct mesh_area* mesh, struct query_info* qinfo,
 #endif
 		rbtree_insert(&mesh->all, &s->node);
 		log_assert(n != NULL);
-		/* set detached (it is now) */
-		mesh->num_detached_states++;
 		added = 1;
 	}
 	if(!s->reply_list && !s->cb_list) {
@@ -672,6 +606,8 @@ mesh_new_callback(struct mesh_area* mesh, struct query_info* qinfo,
 	}
 	/* add serve expired timer if not already there */
 	if(timeout && !mesh_serve_expired_init(s, timeout)) {
+		if(added)
+			mesh_state_delete(&s->s);
 		return 0;
 	}
 	/* update statistics */
@@ -773,7 +709,7 @@ static void mesh_schedule_prefetch(struct mesh_area* mesh,
  * attached its own ECS data. */
 static void mesh_schedule_prefetch_subnet(struct mesh_area* mesh,
 	struct query_info* qinfo, uint16_t qflags, time_t leeway, int run,
-	int rpz_passthru, struct comm_reply* rep, struct edns_option* edns_list)
+	int rpz_passthru, struct sockaddr_storage* addr, struct edns_option* edns_list)
 {
 	struct mesh_state* s = NULL;
 	struct edns_option* opt = NULL;
@@ -803,20 +739,10 @@ static void mesh_schedule_prefetch_subnet(struct mesh_area* mesh,
 			return;
 		}
 	} else {
-		/* Fake the ECS data from the client's IP */
-		struct ecs_data ecs;
-		memset(&ecs, 0, sizeof(ecs));
-		subnet_option_from_ss(&rep->client_addr, &ecs, mesh->env->cfg);
-		if(ecs.subnet_validdata == 0) {
-			log_err("prefetch_subnet subnet_option_from_ss: invalid data");
-			return;
-		}
-		subnet_ecs_opt_list_append(&ecs, &s->s.edns_opts_front_in,
-			&s->s, s->s.region);
-		if(!s->s.edns_opts_front_in) {
-			log_err("prefetch_subnet subnet_ecs_opt_list_append: out of memory");
-			return;
-		}
+		/* Store the client's address. Later in the subnet module,
+		 * it is decided whether to include an ECS option or not.
+		 */
+		s->s.client_addr =  *addr;
 	}
 #ifdef UNBOUND_DEBUG
 	n =
@@ -863,14 +789,14 @@ static void mesh_schedule_prefetch_subnet(struct mesh_area* mesh,
 
 void mesh_new_prefetch(struct mesh_area* mesh, struct query_info* qinfo,
 	uint16_t qflags, time_t leeway, int rpz_passthru,
-	struct comm_reply* rep, struct edns_option* opt_list)
+	struct sockaddr_storage* addr, struct edns_option* opt_list)
 {
+	(void)addr;
 	(void)opt_list;
-	(void)rep;
 #ifdef CLIENT_SUBNET
-	if(rep)
+	if(addr)
 		mesh_schedule_prefetch_subnet(mesh, qinfo, qflags, leeway, 1,
-			rpz_passthru, rep, opt_list);
+			rpz_passthru, addr, opt_list);
 	else
 #endif
 		mesh_schedule_prefetch(mesh, qinfo, qflags, leeway, 1,
@@ -900,7 +826,7 @@ mesh_state_create(struct module_env* env, struct query_info* qinfo,
 	int i;
 	if(!region)
 		return NULL;
-	mstate = (struct mesh_state*)regional_alloc(region, 
+	mstate = (struct mesh_state*)regional_alloc(region,
 		sizeof(struct mesh_state));
 	if(!mstate) {
 		alloc_reg_release(env->alloc, region);
@@ -970,19 +896,13 @@ mesh_state_create(struct module_env* env, struct query_info* qinfo,
 	return mstate;
 }
 
-int
-mesh_state_is_unique(struct mesh_state* mstate)
-{
-	return mstate->unique != NULL;
-}
-
 void
 mesh_state_make_unique(struct mesh_state* mstate)
 {
 	mstate->unique = mstate;
 }
 
-void 
+void
 mesh_state_cleanup(struct mesh_state* mstate)
 {
 	struct mesh_area* mesh;
@@ -1028,7 +948,7 @@ mesh_state_cleanup(struct mesh_state* mstate)
 	alloc_reg_release(mstate->s.env->alloc, mstate->s.region);
 }
 
-void 
+void
 mesh_state_delete(struct module_qstate* qstate)
 {
 	struct mesh_area* mesh;
@@ -1041,10 +961,10 @@ mesh_state_delete(struct module_qstate* qstate)
 	mesh_detach_subs(&mstate->s);
 	if(mstate->list_select == mesh_forever_list) {
 		mesh->num_forever_states --;
-		mesh_list_remove(mstate, &mesh->forever_first, 
+		mesh_list_remove(mstate, &mesh->forever_first,
 			&mesh->forever_last);
 	} else if(mstate->list_select == mesh_jostle_list) {
-		mesh_list_remove(mstate, &mesh->jostle_first, 
+		mesh_list_remove(mstate, &mesh->jostle_first,
 			&mesh->jostle_last);
 	}
 	if(!mstate->reply_list && !mstate->cb_list
@@ -1116,7 +1036,7 @@ void mesh_detach_subs(struct module_qstate* qstate)
 		if(!ref->s->reply_list && !ref->s->cb_list
 			&& ref->s->super_set.count == 0) {
 			mesh->num_detached_states++;
-			log_assert(mesh->num_detached_states + 
+			log_assert(mesh->num_detached_states +
 				mesh->num_reply_states <= mesh->all.count);
 		}
 	}
@@ -1181,7 +1101,7 @@ int mesh_attach_sub(struct module_qstate* qstate, struct query_info* qinfo,
 	if(!mesh_state_attachment(qstate->mesh_info, sub))
 		return 0;
 	/* if it was a duplicate  attachment, the count was not zero before */
-	if(!sub->reply_list && !sub->cb_list && was_detached && 
+	if(!sub->reply_list && !sub->cb_list && was_detached &&
 		sub->super_set.count == 1) {
 		/* it used to be detached, before this one got added */
 		log_assert(mesh->num_detached_states > 0);
@@ -1251,7 +1171,7 @@ mesh_do_callback(struct mesh_state* m, int rcode, struct reply_info* rep,
 	else	secure = 0;
 	if(!rep && rcode == LDNS_RCODE_NOERROR)
 		rcode = LDNS_RCODE_SERVFAIL;
-	if(!rcode && (rep->security == sec_status_bogus ||
+	if(!rcode && rep && (rep->security == sec_status_bogus ||
 		rep->security == sec_status_secure_sentinel_fail)) {
 		if(!(reason = errinf_to_str_bogus(&m->s)))
 			rcode = LDNS_RCODE_SERVFAIL;
@@ -1280,10 +1200,10 @@ mesh_do_callback(struct mesh_state* m, int rcode, struct reply_info* rep,
 
 		if(!inplace_cb_reply_call(m->s.env, &m->s.qinfo, &m->s, rep,
 			LDNS_RCODE_NOERROR, &r->edns, NULL, m->s.region, start_time) ||
-			!reply_info_answer_encode(&m->s.qinfo, rep, r->qid, 
-			r->qflags, r->buf, 0, 1, 
-			m->s.env->scratch, udp_size, &r->edns, 
-			(int)(r->edns.bits & EDNS_DO), secure)) 
+			!reply_info_answer_encode(&m->s.qinfo, rep, r->qid,
+			r->qflags, r->buf, 0, 1,
+			m->s.env->scratch, udp_size, &r->edns,
+			(int)(r->edns.bits & EDNS_DO), secure))
 		{
 			fptr_ok(fptr_whitelist_mesh_cb(r->cb));
 			(*r->cb)(r->cb_arg, LDNS_RCODE_SERVFAIL, r->buf,
@@ -1291,7 +1211,8 @@ mesh_do_callback(struct mesh_state* m, int rcode, struct reply_info* rep,
 		} else {
 			fptr_ok(fptr_whitelist_mesh_cb(r->cb));
 			(*r->cb)(r->cb_arg, LDNS_RCODE_NOERROR, r->buf,
-				rep->security, reason, was_ratelimited);
+				(rep?rep->security:sec_status_unchecked),
+				reason, was_ratelimited);
 		}
 	}
 	free(reason);
@@ -1311,10 +1232,36 @@ mesh_is_rpz_respip_tcponly_action(struct mesh_state const* m)
 }
 
 static inline int
-mesh_is_udp(struct mesh_reply const* r) {
+mesh_is_udp(struct mesh_reply const* r)
+{
 	return r->query_reply.c->type == comm_udp;
 }
 
+static inline void
+mesh_find_and_attach_ede_and_reason(struct mesh_state* m,
+	struct reply_info* rep, struct mesh_reply* r)
+{
+	/* OLD note:
+	 * During validation the EDE code can be received via two
+	 * code paths. One code path fills the reply_info EDE, and
+	 * the other fills it in the errinf_strlist. These paths
+	 * intersect at some points, but where is opaque due to
+	 * the complexity of the validator. At the time of writing
+	 * we make the choice to prefer the EDE from errinf_strlist
+	 * but a compelling reason to do otherwise is just as valid
+	 * NEW note:
+	 * The compelling reason is that with caching support, the value
+	 * in the reply_info is cached.
+	 * The reason members of the reply_info struct should be
+	 * updated as they are already cached. No reason to
+	 * try and find the EDE information in errinf anymore.
+	 */
+	if(rep->reason_bogus != LDNS_EDE_NONE) {
+		edns_opt_list_append_ede(&r->edns.opt_list_out,
+			m->s.region, rep->reason_bogus, rep->reason_bogus_str);
+	}
+}
+
 /**
  * Send reply to mesh reply entry
  * @param m: mesh state to send it for.
@@ -1346,7 +1293,7 @@ mesh_send_reply(struct mesh_state* m, int rcode, struct reply_info* rep,
 
 	/* examine security status */
 	if(m->s.env->need_to_validate && (!(r->qflags&BIT_CD) ||
-		m->s.env->cfg->ignore_cd) && rep && 
+		m->s.env->cfg->ignore_cd) && rep &&
 		(rep->security <= sec_status_bogus ||
 		rep->security == sec_status_secure_sentinel_fail)) {
 		rcode = LDNS_RCODE_SERVFAIL;
@@ -1401,40 +1348,17 @@ mesh_send_reply(struct mesh_state* m, int rcode, struct reply_info* rep,
 			if(!inplace_cb_reply_servfail_call(m->s.env, &m->s.qinfo, &m->s,
 				rep, rcode, &r->edns, &r->query_reply, m->s.region, &r->start_time))
 					r->edns.opt_list_inplace_cb_out = NULL;
-		} else { 
+		} else {
 			if(!inplace_cb_reply_call(m->s.env, &m->s.qinfo, &m->s, rep, rcode,
 				&r->edns, &r->query_reply, m->s.region, &r->start_time))
 					r->edns.opt_list_inplace_cb_out = NULL;
 		}
-		/* Send along EDE BOGUS EDNS0 option when answer is bogus */
-		if(m->s.env->cfg->ede && rcode == LDNS_RCODE_SERVFAIL &&
-			m->s.env->need_to_validate && (!(r->qflags&BIT_CD) ||
-			m->s.env->cfg->ignore_cd) && rep &&
-			(rep->security <= sec_status_bogus ||
-			rep->security == sec_status_secure_sentinel_fail)) {
-			char *reason = m->s.env->cfg->val_log_level >= 2
-				? errinf_to_str_bogus(&m->s) : NULL;
-
-			/* During validation the EDE code can be received via two
-			 * code paths. One code path fills the reply_info EDE, and
-			 * the other fills it in the errinf_strlist. These paths
-			 * intersect at some points, but where is opaque due to
-			 * the complexity of the validator. At the time of writing
-			 * we make the choice to prefer the EDE from errinf_strlist
-			 * but a compelling reason to do otherwise is just as valid
-			 */
-			sldns_ede_code reason_bogus = errinf_to_reason_bogus(&m->s);
-			if ((reason_bogus == LDNS_EDE_DNSSEC_BOGUS &&
-				rep->reason_bogus != LDNS_EDE_NONE) ||
-				reason_bogus == LDNS_EDE_NONE) {
-					reason_bogus = rep->reason_bogus;
-			}
-
-			if(reason_bogus != LDNS_EDE_NONE) {
-				edns_opt_list_append_ede(&r->edns.opt_list_out,
-					m->s.region, reason_bogus, reason);
-			}
-			free(reason);
+		/* Send along EDE EDNS0 option when SERVFAILing; usually
+		 * DNSSEC validation failures */
+		/* Since we are SERVFAILing here, CD bit and rep->security
+		 * is already handled. */
+		if(m->s.env->cfg->ede && rep) {
+			mesh_find_and_attach_ede_and_reason(m, rep, r);
 		}
 		error_encode(r_buffer, rcode, &m->s.qinfo, r->qid,
 			r->qflags, &r->edns);
@@ -1449,12 +1373,22 @@ mesh_send_reply(struct mesh_state* m, int rcode, struct reply_info* rep,
 		r->edns.bits &= EDNS_DO;
 		m->s.qinfo.qname = r->qname;
 		m->s.qinfo.local_alias = r->local_alias;
+
+		/* Attach EDE without SERVFAIL if the validation failed.
+		 * Need to explicitly check for rep->security otherwise failed
+		 * validation paths may attach to a secure answer. */
+		if(m->s.env->cfg->ede && rep &&
+			(rep->security <= sec_status_bogus ||
+			rep->security == sec_status_secure_sentinel_fail)) {
+			mesh_find_and_attach_ede_and_reason(m, rep, r);
+		}
+
 		if(!inplace_cb_reply_call(m->s.env, &m->s.qinfo, &m->s, rep,
 			LDNS_RCODE_NOERROR, &r->edns, &r->query_reply, m->s.region, &r->start_time) ||
-			!reply_info_answer_encode(&m->s.qinfo, rep, r->qid, 
+			!reply_info_answer_encode(&m->s.qinfo, rep, r->qid,
 			r->qflags, r_buffer, 0, 1, m->s.env->scratch,
 			udp_size, &r->edns, (int)(r->edns.bits & EDNS_DO),
-			secure)) 
+			secure))
 		{
 			if(!inplace_cb_reply_servfail_call(m->s.env, &m->s.qinfo, &m->s,
 			rep, LDNS_RCODE_SERVFAIL, &r->edns, &r->query_reply, m->s.region, &r->start_time))
@@ -1503,6 +1437,7 @@ void mesh_query_done(struct mesh_state* mstate)
 	struct reply_info* rep = (mstate->s.return_msg?
 		mstate->s.return_msg->rep:NULL);
 	struct timeval tv = {0, 0};
+	int i = 0;
 	/* No need for the serve expired timer anymore; we are going to reply. */
 	if(mstate->s.serve_expired_data) {
 		comm_timer_delete(mstate->s.serve_expired_data->timer);
@@ -1522,6 +1457,7 @@ void mesh_query_done(struct mesh_state* mstate)
 		}
 	}
 	for(r = mstate->reply_list; r; r = r->next) {
+		i++;
 		tv = r->start_time;
 
 		/* if a response-ip address block has been stored the
@@ -1533,16 +1469,6 @@ void mesh_query_done(struct mesh_state* mstate)
 				mstate->s.qinfo.qclass, r->local_alias,
 				&r->query_reply.client_addr,
 				r->query_reply.client_addrlen);
-			if(mstate->s.env->cfg->stat_extended &&
-				mstate->s.respip_action_info->rpz_used) {
-				if(mstate->s.respip_action_info->rpz_disabled)
-					mstate->s.env->mesh->rpz_action[RPZ_DISABLED_ACTION]++;
-				if(mstate->s.respip_action_info->rpz_cname_override)
-					mstate->s.env->mesh->rpz_action[RPZ_CNAME_OVERRIDE_ACTION]++;
-				else
-					mstate->s.env->mesh->rpz_action[respip_action_to_rpz_action(
-						mstate->s.respip_action_info->action)]++;
-			}
 		}
 
 		/* if this query is determined to be dropped during the
@@ -1573,6 +1499,27 @@ void mesh_query_done(struct mesh_state* mstate)
 			prev_buffer = r_buffer;
 		}
 	}
+	/* Account for each reply sent. */
+	if(i > 0 && mstate->s.respip_action_info &&
+		mstate->s.respip_action_info->addrinfo &&
+		mstate->s.env->cfg->stat_extended &&
+		mstate->s.respip_action_info->rpz_used) {
+		if(mstate->s.respip_action_info->rpz_disabled)
+			mstate->s.env->mesh->rpz_action[RPZ_DISABLED_ACTION] += i;
+		if(mstate->s.respip_action_info->rpz_cname_override)
+			mstate->s.env->mesh->rpz_action[RPZ_CNAME_OVERRIDE_ACTION] += i;
+		else
+			mstate->s.env->mesh->rpz_action[respip_action_to_rpz_action(
+				mstate->s.respip_action_info->action)] += i;
+	}
+	if(!mstate->s.is_drop && i > 0) {
+		if(mstate->s.env->cfg->stat_extended
+			&& mstate->s.is_cachedb_answer) {
+			mstate->s.env->mesh->ans_cachedb += i;
+		}
+	}
+
+	/* Mesh area accounting */
 	if(mstate->reply_list) {
 		mstate->reply_list = NULL;
 		if(!mstate->reply_list && !mstate->cb_list) {
@@ -1585,6 +1532,7 @@ void mesh_query_done(struct mesh_state* mstate)
 			mstate->s.env->mesh->num_detached_states++;
 	}
 	mstate->replies_sent = 1;
+
 	while((c = mstate->cb_list) != NULL) {
 		/* take this cb off the list; so that the list can be
 		 * changed, eg. by adds from the callback routine */
@@ -1611,7 +1559,7 @@ void mesh_walk_supers(struct mesh_area* mesh, struct mesh_state* mstate)
 		/* callback the function to inform super of result */
 		fptr_ok(fptr_whitelist_mod_inform_super(
 			mesh->mods.mod[ref->s->s.curmod]->inform_super));
-		(*mesh->mods.mod[ref->s->s.curmod]->inform_super)(&mstate->s, 
+		(*mesh->mods.mod[ref->s->s.curmod]->inform_super)(&mstate->s,
 			ref->s->s.curmod, &ref->s->s);
 		/* copy state that is always relevant to super */
 		copy_state_to_super(&mstate->s, ref->s->s.curmod, &ref->s->s);
@@ -1635,7 +1583,7 @@ struct mesh_state* mesh_area_find(struct mesh_area* mesh,
 	 * desire aggregation).*/
 	key.unique = NULL;
 	key.s.client_info = cinfo;
-	
+
 	result = (struct mesh_state*)rbtree_search(&mesh->all, &key);
 	return result;
 }
@@ -1644,7 +1592,7 @@ int mesh_state_add_cb(struct mesh_state* s, struct edns_data* edns,
         sldns_buffer* buf, mesh_cb_func_type cb, void* cb_arg,
 	uint16_t qid, uint16_t qflags)
 {
-	struct mesh_cb* r = regional_alloc(s->s.region, 
+	struct mesh_cb* r = regional_alloc(s->s.region,
 		sizeof(struct mesh_cb));
 	if(!r)
 		return 0;
@@ -1776,7 +1724,7 @@ mesh_copy_qinfo(struct mesh_state* mstate, struct query_info** qinfop,
  * Handles module finished.
  * @param mesh: the mesh area.
  * @param mstate: currently active mesh state.
- * 	Deleted if finished, calls _done and _supers to 
+ * 	Deleted if finished, calls _done and _supers to
  * 	send replies to clients and inform other mesh states.
  * 	This in turn may create additional runnable mesh states.
  * @param s: state at which the current module exited.
@@ -1810,7 +1758,7 @@ mesh_continue(struct mesh_area* mesh, struct mesh_state* mstate,
 		}
 		if(s == module_restart_next) {
 			int curmod = mstate->s.curmod;
-			for(; mstate->s.curmod < mesh->mods.num; 
+			for(; mstate->s.curmod < mesh->mods.num;
 				mstate->s.curmod++) {
 				fptr_ok(fptr_whitelist_mod_clear(
 					mesh->mods.mod[mstate->s.curmod]->clear));
@@ -1842,9 +1790,21 @@ mesh_continue(struct mesh_area* mesh, struct mesh_state* mstate,
 	if(s == module_finished) {
 		if(mstate->s.curmod == 0) {
 			struct query_info* qinfo = NULL;
+			struct edns_option* opt_list = NULL;
+			struct sockaddr_storage addr;
 			uint16_t qflags;
 			int rpz_p = 0;
 
+#ifdef CLIENT_SUBNET
+			struct edns_option* ecs;
+			if(mstate->s.need_refetch && mstate->reply_list &&
+				modstack_find(&mesh->mods, "subnetcache") != -1 &&
+				mstate->s.env->unique_mesh) {
+				addr = mstate->reply_list->query_reply.client_addr;
+			} else
+#endif
+				memset(&addr, 0, sizeof(addr));
+
 			mesh_query_done(mstate);
 			mesh_walk_supers(mesh, mstate);
 
@@ -1854,13 +1814,28 @@ mesh_continue(struct mesh_area* mesh, struct mesh_state* mstate,
 			 * we need to make a copy of the query info here. */
 			if(mstate->s.need_refetch) {
 				mesh_copy_qinfo(mstate, &qinfo, &qflags);
+#ifdef CLIENT_SUBNET
+				/* Make also a copy of the ecs option if any */
+				if((ecs = edns_opt_list_find(
+					mstate->s.edns_opts_front_in,
+					mstate->s.env->cfg->client_subnet_opcode)) != NULL) {
+					(void)edns_opt_list_append(&opt_list,
+						ecs->opt_code, ecs->opt_len,
+						ecs->opt_data,
+						mstate->s.env->scratch);
+				}
+#endif
 				rpz_p = mstate->s.rpz_passthru;
 			}
 
-			mesh_state_delete(&mstate->s);
 			if(qinfo) {
-				mesh_schedule_prefetch(mesh, qinfo, qflags,
-					0, 1, rpz_p);
+				mesh_state_delete(&mstate->s);
+				mesh_new_prefetch(mesh, qinfo, qflags, 0,
+					rpz_p,
+					addr.ss_family!=AF_UNSPEC?&addr:NULL,
+					opt_list);
+			} else {
+				mesh_state_delete(&mstate->s);
 			}
 			return 0;
 		}
@@ -1888,7 +1863,7 @@ void mesh_run(struct mesh_area* mesh, struct mesh_state* mstate,
 		mstate->s.reply = NULL;
 		regional_free_all(mstate->s.env->scratch);
 		s = mstate->s.ext_state[mstate->s.curmod];
-		verbose(VERB_ALGO, "mesh_run: %s module exit state is %s", 
+		verbose(VERB_ALGO, "mesh_run: %s module exit state is %s",
 			mesh->mods.mod[mstate->s.curmod]->name, strextstate(s));
 		e = NULL;
 		if(mesh_continue(mesh, mstate, s, &ev))
@@ -1908,14 +1883,14 @@ void mesh_run(struct mesh_area* mesh, struct mesh_state* mstate,
 	}
 }
 
-void 
+void
 mesh_log_list(struct mesh_area* mesh)
 {
 	char buf[30];
 	struct mesh_state* m;
 	int num = 0;
 	RBTREE_FOR(m, struct mesh_state*, &mesh->all) {
-		snprintf(buf, sizeof(buf), "%d%s%s%s%s%s%s mod%d %s%s", 
+		snprintf(buf, sizeof(buf), "%d%s%s%s%s%s%s mod%d %s%s",
 			num++, (m->s.is_priming)?"p":"",  /* prime */
 			(m->s.is_valrec)?"v":"",  /* prime */
 			(m->s.query_flags&BIT_RD)?"RD":"",
@@ -1924,18 +1899,18 @@ mesh_log_list(struct mesh_area* mesh)
 			(m->sub_set.count!=0)?"c":"",  /* children */
 			m->s.curmod, (m->reply_list)?"rep":"", /*hasreply*/
 			(m->cb_list)?"cb":"" /* callbacks */
-			); 
+			);
 		log_query_info(VERB_ALGO, buf, &m->s.qinfo);
 	}
 }
 
-void 
+void
 mesh_stats(struct mesh_area* mesh, const char* str)
 {
 	verbose(VERB_DETAIL, "%s %u recursion states (%u with reply, "
 		"%u detached), %u waiting replies, %u recursion replies "
-		"sent, %d replies dropped, %d states jostled out", 
-		str, (unsigned)mesh->all.count, 
+		"sent, %d replies dropped, %d states jostled out",
+		str, (unsigned)mesh->all.count,
 		(unsigned)mesh->num_reply_states,
 		(unsigned)mesh->num_detached_states,
 		(unsigned)mesh->num_reply_addrs,
@@ -1944,7 +1919,7 @@ mesh_stats(struct mesh_area* mesh, const char* str)
 		(unsigned)mesh->stats_jostled);
 	if(mesh->replies_sent > 0) {
 		struct timeval avg;
-		timeval_divide(&avg, &mesh->replies_sum_wait, 
+		timeval_divide(&avg, &mesh->replies_sum_wait,
 			mesh->replies_sent);
 		log_info("average recursion processing time "
 			ARG_LL "d.%6.6d sec",
@@ -1954,7 +1929,7 @@ mesh_stats(struct mesh_area* mesh, const char* str)
 	}
 }
 
-void 
+void
 mesh_stats_clear(struct mesh_area* mesh)
 {
 	if(!mesh)
@@ -1968,12 +1943,13 @@ mesh_stats_clear(struct mesh_area* mesh)
 	mesh->ans_secure = 0;
 	mesh->ans_bogus = 0;
 	mesh->ans_expired = 0;
+	mesh->ans_cachedb = 0;
 	memset(&mesh->ans_rcode[0], 0, sizeof(size_t)*UB_STATS_RCODE_NUM);
 	memset(&mesh->rpz_action[0], 0, sizeof(size_t)*UB_STATS_RPZ_ACTION_NUM);
 	mesh->ans_nodata = 0;
 }
 
-size_t 
+size_t
 mesh_get_mem(struct mesh_area* mesh)
 {
 	struct mesh_state* m;
@@ -1987,7 +1963,7 @@ mesh_get_mem(struct mesh_area* mesh)
 	return s;
 }
 
-int 
+int
 mesh_detect_cycle(struct module_qstate* qstate, struct query_info* qinfo,
 	uint16_t flags, int prime, int valrec)
 {
@@ -2104,6 +2080,7 @@ mesh_serve_expired_callback(void* arg)
 	struct timeval tv = {0, 0};
 	int must_validate = (!(qstate->query_flags&BIT_CD)
 		|| qstate->env->cfg->ignore_cd) && qstate->env->need_to_validate;
+	int i = 0;
 	if(!qstate->serve_expired_data) return;
 	verbose(VERB_ALGO, "Serve expired: Trying to reply with expired data");
 	comm_timer_delete(qstate->serve_expired_data->timer);
@@ -2175,6 +2152,7 @@ mesh_serve_expired_callback(void* arg)
 		log_dns_msg("Serve expired lookup", &qstate->qinfo, msg->rep);
 
 	for(r = mstate->reply_list; r; r = r->next) {
+		i++;
 		tv = r->start_time;
 
 		/* If address info is returned, it means the action should be an
@@ -2184,16 +2162,6 @@ mesh_serve_expired_callback(void* arg)
 				qstate->qinfo.qtype, qstate->qinfo.qclass,
 				r->local_alias, &r->query_reply.client_addr,
 				r->query_reply.client_addrlen);
-
-			if(qstate->env->cfg->stat_extended && actinfo.rpz_used) {
-				if(actinfo.rpz_disabled)
-					qstate->env->mesh->rpz_action[RPZ_DISABLED_ACTION]++;
-				if(actinfo.rpz_cname_override)
-					qstate->env->mesh->rpz_action[RPZ_CNAME_OVERRIDE_ACTION]++;
-				else
-					qstate->env->mesh->rpz_action[
-						respip_action_to_rpz_action(actinfo.action)]++;
-			}
 		}
 
 		/* Add EDE Stale Answer (RCF8914). Ignore global ede as this is
@@ -2213,11 +2181,23 @@ mesh_serve_expired_callback(void* arg)
 			tcp_req_info_remove_mesh_state(r->query_reply.c->tcp_req_info, mstate);
 		prev = r;
 		prev_buffer = r_buffer;
-
-		/* Account for each reply sent. */
-		mesh->ans_expired++;
-
 	}
+	/* Account for each reply sent. */
+	if(i > 0) {
+		mesh->ans_expired += i;
+		if(actinfo.addrinfo && qstate->env->cfg->stat_extended &&
+			actinfo.rpz_used) {
+			if(actinfo.rpz_disabled)
+				qstate->env->mesh->rpz_action[RPZ_DISABLED_ACTION] += i;
+			if(actinfo.rpz_cname_override)
+				qstate->env->mesh->rpz_action[RPZ_CNAME_OVERRIDE_ACTION] += i;
+			else
+				qstate->env->mesh->rpz_action[
+					respip_action_to_rpz_action(actinfo.action)] += i;
+		}
+	}
+
+	/* Mesh area accounting */
 	if(mstate->reply_list) {
 		mstate->reply_list = NULL;
 		if(!mstate->reply_list && !mstate->cb_list) {
@@ -2228,6 +2208,7 @@ mesh_serve_expired_callback(void* arg)
 			}
 		}
 	}
+
 	while((c = mstate->cb_list) != NULL) {
 		/* take this cb off the list; so that the list can be
 		 * changed, eg. by adds from the callback routine */
diff --git a/contrib/unbound/services/mesh.h b/contrib/unbound/services/mesh.h
index 25121a67b3a5..d926cfc9dec3 100644
--- a/contrib/unbound/services/mesh.h
+++ b/contrib/unbound/services/mesh.h
@@ -114,6 +114,8 @@ struct mesh_area {
 	size_t stats_dropped;
 	/** stats, number of expired replies sent */
 	size_t ans_expired;
+	/** stats, number of cached replies from cachedb */
+	size_t ans_cachedb;
 	/** number of replies sent */
 	size_t replies_sent;
 	/** sum of waiting times for the replies */
@@ -335,13 +337,13 @@ int mesh_new_callback(struct mesh_area* mesh, struct query_info* qinfo,
  * @param leeway: TTL leeway what to expire earlier for this update.
  * @param rpz_passthru: if true, the rpz passthru was previously found and
  * 	further rpz processing is stopped.
- * @param rep: comm_reply for the client; to be used when subnet is enabled.
+ * @param addr: sockaddr_storage for the client; to be used with subnet.
  * @param opt_list: edns opt_list from the client; to be used when subnet is
  *	enabled.
  */
 void mesh_new_prefetch(struct mesh_area* mesh, struct query_info* qinfo,
 	uint16_t qflags, time_t leeway, int rpz_passthru,
-	struct comm_reply* rep, struct edns_option* opt_list);
+	struct sockaddr_storage* addr, struct edns_option* opt_list);
 
 /**
  * Handle new event from the wire. A serviced query has returned.
@@ -479,14 +481,6 @@ struct mesh_state* mesh_state_create(struct module_env* env,
 	uint16_t qflags, int prime, int valrec);
 
 /**
- * Check if the mesh state is unique.
- * A unique mesh state uses it's unique member to point to itself, else NULL.
- * @param mstate: mesh state to check.
- * @return true if the mesh state is unique, false otherwise.
- */
-int mesh_state_is_unique(struct mesh_state* mstate);
-
-/**
  * Make a mesh state unique.
  * A unique mesh state uses it's unique member to point to itself.
  * @param mstate: mesh state to check.
diff --git a/contrib/unbound/services/modstack.c b/contrib/unbound/services/modstack.c
index da8e623c16da..a90d7178c410 100644
--- a/contrib/unbound/services/modstack.c
+++ b/contrib/unbound/services/modstack.c
@@ -120,12 +120,16 @@ modstack_config(struct module_stack* stack, const char* module_conf)
 		stack->mod[i] = module_factory(&module_conf);
 		if(!stack->mod[i]) {
 			char md[256];
+			char * s = md;
 			snprintf(md, sizeof(md), "%s", module_conf);
-			if(strchr(md, ' ')) *(strchr(md, ' ')) = 0;
-			if(strchr(md, '\t')) *(strchr(md, '\t')) = 0;
+			/* Leading spaces are present on errors. */
+			while (*s && isspace((unsigned char)*s))
+				s++;
+			if(strchr(s, ' ')) *(strchr(s, ' ')) = 0;
+			if(strchr(s, '\t')) *(strchr(s, '\t')) = 0;
 			log_err("Unknown value in module-config, module: '%s'."
 				" This module is not present (not compiled in),"
-				" See the list of linked modules with unbound -V", md);
+				" See the list of linked modules with unbound -V", s);
 			return 0;
 		}
 	}
diff --git a/contrib/unbound/services/outside_network.c b/contrib/unbound/services/outside_network.c
index a4529ade52e0..2a219cbc6e92 100644
--- a/contrib/unbound/services/outside_network.c
+++ b/contrib/unbound/services/outside_network.c
@@ -551,8 +551,27 @@ reuse_tcp_find(struct outside_network* outnet, struct sockaddr_storage* addr,
 		log_assert(&key_p != ((struct reuse_tcp*)result)->pending);
 	}
 	/* not found, return null */
+
+	/* It is possible that we search for something before the first element
+	 * in the tree. Replace a null pointer with the first element.
+	 */
+	if (!result) {
+		verbose(VERB_CLIENT, "reuse_tcp_find: taking first");
+		result = rbtree_first(&outnet->tcp_reuse);
+	}
+
 	if(!result || result == RBTREE_NULL)
 		return NULL;
+
+	/* It is possible that we got the previous address, but that the
+	 * address we are looking for is in the tree. If the address we got
+	 * is less than the address we are looking, then take the next entry.
+	 */
+	if (reuse_cmp_addrportssl(result->key, &key_p.reuse) < 0) {
+		verbose(VERB_CLIENT, "reuse_tcp_find: key too low");
+		result = rbtree_next(result);
+	}
+
 	verbose(VERB_CLIENT, "reuse_tcp_find check inexact match");
 	/* inexact match, find one of possibly several connections to the
 	 * same destination address, with the correct port, ssl, and
@@ -620,6 +639,15 @@ outnet_tcp_take_into_use(struct waiting_tcp* w)
 	log_assert(w->addrlen > 0);
 	pend->c->tcp_do_toggle_rw = 0;
 	pend->c->tcp_do_close = 0;
+
+	/* Consistency check, if we have ssl_upstream but no sslctx, then
+	 * log an error and return failure.
+	 */
+	if (w->ssl_upstream && !w->outnet->sslctx) {
+		log_err("SSL upstream requested but no SSL context");
+		return 0;
+	}
+
 	/* open socket */
 	s = outnet_get_tcp_fd(&w->addr, w->addrlen, w->outnet->tcp_mss, w->outnet->ip_dscp);
 
diff --git a/contrib/unbound/services/rpz.c b/contrib/unbound/services/rpz.c
index e876f3f94834..6ce83cb66a35 100644
--- a/contrib/unbound/services/rpz.c
+++ b/contrib/unbound/services/rpz.c
@@ -1188,6 +1188,22 @@ rpz_find_zone(struct local_zones* zones, uint8_t* qname, size_t qname_len, uint1
 	return z;
 }
 
+/** Find entry for RR type in the list of rrsets for the clientip. */
+static struct local_rrset*
+rpz_find_synthesized_rrset(uint16_t qtype,
+	struct clientip_synthesized_rr* data)
+{
+	struct local_rrset* cursor = data->data;
+	while( cursor != NULL) {
+		struct packed_rrset_key* packed_rrset = &cursor->rrset->rk;
+		if(htons(qtype) == packed_rrset->type) {
+			return cursor;
+		}
+		cursor = cursor->next;
+	}
+	return NULL;
+}
+
 /**
  * Remove RR from RPZ's local-data
  * @param z: local-zone for RPZ, holding write lock
@@ -1270,15 +1286,15 @@ rpz_rrset_delete_rr(struct resp_addr* raddr, uint16_t rr_type, uint8_t* rdata,
 
 }
 
-/** Remove RR from RPZ's local-zone */
+/** Remove RR from rpz localzones structure */
 static void
-rpz_remove_qname_trigger(struct rpz* r, uint8_t* dname, size_t dnamelen,
-	enum rpz_action a, uint16_t rr_type, uint16_t rr_class,
-	uint8_t* rdatawl, size_t rdatalen)
+rpz_remove_local_zones_trigger(struct local_zones* zones, uint8_t* dname,
+	size_t dnamelen, enum rpz_action a, uint16_t rr_type,
+	uint16_t rr_class, uint8_t* rdatawl, size_t rdatalen)
 {
 	struct local_zone* z;
 	int delete_zone = 1;
-	z = rpz_find_zone(r->local_zones, dname, dnamelen, rr_class,
+	z = rpz_find_zone(zones, dname, dnamelen, rr_class,
 		1 /* only exact */, 1 /* wr lock */, 1 /* keep lock*/);
 	if(!z) {
 		verbose(VERB_ALGO, "rpz: cannot remove RR from IXFR, "
@@ -1290,15 +1306,24 @@ rpz_remove_qname_trigger(struct rpz* r, uint8_t* dname, size_t dnamelen,
 			dnamelen, rr_type, rdatawl, rdatalen);
 	else if(a != localzone_type_to_rpz_action(z->type)) {
 		lock_rw_unlock(&z->lock);
-		lock_rw_unlock(&r->local_zones->lock);
+		lock_rw_unlock(&zones->lock);
 		return;
 	}
 	lock_rw_unlock(&z->lock); 
 	if(delete_zone) {
-		local_zones_del_zone(r->local_zones, z);
+		local_zones_del_zone(zones, z);
 	}
-	lock_rw_unlock(&r->local_zones->lock); 
-	return;
+	lock_rw_unlock(&zones->lock);
+}
+
+/** Remove RR from RPZ's local-zone */
+static void
+rpz_remove_qname_trigger(struct rpz* r, uint8_t* dname, size_t dnamelen,
+	enum rpz_action a, uint16_t rr_type, uint16_t rr_class,
+	uint8_t* rdatawl, size_t rdatalen)
+{
+	rpz_remove_local_zones_trigger(r->local_zones, dname, dnamelen,
+		a, rr_type, rr_class, rdatawl, rdatalen);
 }
 
 static void
@@ -1335,15 +1360,159 @@ rpz_remove_response_ip_trigger(struct rpz* r, uint8_t* dname, size_t dnamelen,
 	lock_rw_unlock(&r->respip_set->lock);
 }
 
+/** find and remove type from list of local_rrset entries*/
+static void
+del_local_rrset_from_list(struct local_rrset** list_head, uint16_t dtype)
+{
+	struct local_rrset* prev=NULL, *p=*list_head;
+	while(p && ntohs(p->rrset->rk.type) != dtype) {
+		prev = p;
+		p = p->next;
+	}
+	if(!p)
+		return; /* rrset type not found */
+	/* unlink it */
+	if(prev) prev->next = p->next;
+	else *list_head = p->next;
+	/* no memory recycling for zone deletions ... */
+}
+
+/** Delete client-ip trigger RR from its RRset and perhaps also the rrset
+ * from the linked list. Returns if the local data is empty and the node can
+ * be deleted too, or not. */
+static int rpz_remove_clientip_rr(struct clientip_synthesized_rr* node,
+	uint16_t rr_type, uint8_t* rdatawl, size_t rdatalen)
+{
+	struct local_rrset* rrset;
+	struct packed_rrset_data* d;
+	size_t index;
+	rrset = rpz_find_synthesized_rrset(rr_type, node);
+	if(rrset == NULL)
+		return 0; /* type not found, ignore */
+	d = (struct packed_rrset_data*)rrset->rrset->entry.data;
+	if(!packed_rrset_find_rr(d, rdatawl, rdatalen, &index))
+		return 0; /* RR not found, ignore */
+	if(d->count == 1) {
+		/* regional alloc'd */
+		/* delete the type entry from the list */
+		del_local_rrset_from_list(&node->data, rr_type);
+		/* if the list is empty, the node can be removed too */
+		if(node->data == NULL)
+			return 1;
+	} else if (d->count > 1) {
+		if(!local_rrset_remove_rr(d, index))
+			return 0;
+	}
+	return 0;
+}
+
+/** remove trigger RR from clientip_syntheized set tree. */
+static void
+rpz_clientip_remove_trigger_rr(struct clientip_synthesized_rrset* set,
+	struct sockaddr_storage* addr, socklen_t addrlen, int net,
+	enum rpz_action a, uint16_t rr_type, uint8_t* rdatawl, size_t rdatalen)
+{
+	struct clientip_synthesized_rr* node;
+	int delete_node = 1;
+
+	lock_rw_wrlock(&set->lock);
+	node = (struct clientip_synthesized_rr*)addr_tree_find(&set->entries,
+		addr, addrlen, net);
+	if(node == NULL) {
+		/* netblock not found */
+		verbose(VERB_ALGO, "rpz: cannot remove RR from IXFR, "
+			"RPZ address, netblock not found");
+		lock_rw_unlock(&set->lock);
+		return;
+	}
+	lock_rw_wrlock(&node->lock);
+	if(a == RPZ_LOCAL_DATA_ACTION) {
+		/* remove RR, signal whether entry can be removed */
+		delete_node = rpz_remove_clientip_rr(node, rr_type, rdatawl,
+			rdatalen);
+	} else if(a != node->action) {
+		/* ignore the RR with different action specification */
+		delete_node = 0;
+	}
+	if(delete_node) {
+		rbtree_delete(&set->entries, node->node.node.key);
+	}
+	lock_rw_unlock(&set->lock);
+	lock_rw_unlock(&node->lock);
+	if(delete_node) {
+		lock_rw_destroy(&node->lock);
+	}
+}
+
+/** Remove clientip trigger RR from RPZ. */
+static void
+rpz_remove_clientip_trigger(struct rpz* r, uint8_t* dname, size_t dnamelen,
+	enum rpz_action a, uint16_t rr_type, uint8_t* rdatawl, size_t rdatalen)
+{
+	struct sockaddr_storage addr;
+	socklen_t addrlen;
+	int net, af;
+	if(a == RPZ_INVALID_ACTION)
+		return;
+	if(!netblockdnametoaddr(dname, dnamelen, &addr, &addrlen, &net, &af))
+		return;
+	rpz_clientip_remove_trigger_rr(r->client_set, &addr, addrlen, net,
+		a, rr_type, rdatawl, rdatalen);
+}
+
+/** Remove nsip trigger RR from RPZ. */
+static void
+rpz_remove_nsip_trigger(struct rpz* r, uint8_t* dname, size_t dnamelen,
+	enum rpz_action a, uint16_t rr_type, uint8_t* rdatawl, size_t rdatalen)
+{
+	struct sockaddr_storage addr;
+	socklen_t addrlen;
+	int net, af;
+	if(a == RPZ_INVALID_ACTION)
+		return;
+	if(!netblockdnametoaddr(dname, dnamelen, &addr, &addrlen, &net, &af))
+		return;
+	rpz_clientip_remove_trigger_rr(r->ns_set, &addr, addrlen, net,
+		a, rr_type, rdatawl, rdatalen);
+}
+
+/** Remove nsdname trigger RR from RPZ. */
+static void
+rpz_remove_nsdname_trigger(struct rpz* r, uint8_t* dname, size_t dnamelen,
+	enum rpz_action a, uint16_t rr_type, uint16_t rr_class,
+	uint8_t* rdatawl, size_t rdatalen)
+{
+	uint8_t* dname_stripped = NULL;
+	size_t dnamelen_stripped = 0;
+	if(a == RPZ_INVALID_ACTION)
+		return;
+	if(!rpz_strip_nsdname_suffix(dname, dnamelen, &dname_stripped,
+		&dnamelen_stripped))
+		return;
+	rpz_remove_local_zones_trigger(r->nsdname_zones, dname_stripped,
+		dnamelen_stripped, a, rr_type, rr_class, rdatawl, rdatalen);
+	free(dname_stripped);
+}
+
 void
-rpz_remove_rr(struct rpz* r, size_t aznamelen, uint8_t* dname, size_t dnamelen,
-	uint16_t rr_type, uint16_t rr_class, uint8_t* rdatawl, size_t rdatalen)
+rpz_remove_rr(struct rpz* r, uint8_t* azname, size_t aznamelen, uint8_t* dname,
+	size_t dnamelen, uint16_t rr_type, uint16_t rr_class, uint8_t* rdatawl,
+	size_t rdatalen)
 {
 	size_t policydnamelen;
 	enum rpz_trigger t;
 	enum rpz_action a;
 	uint8_t* policydname;
 
+	if(rpz_type_ignored(rr_type)) {
+		/* this rpz action is not valid, eg. this is the SOA or NS RR */
+		return;
+	}
+	if(!dname_subdomain_c(dname, azname)) {
+		/* not subdomain of the RPZ zone. */
+		return;
+	}
+
 	if(!(policydname = calloc(1, LDNS_MAX_DOMAINLEN + 1)))
 		return;
 
@@ -1358,13 +1527,28 @@ rpz_remove_rr(struct rpz* r, size_t aznamelen, uint8_t* dname, size_t dnamelen,
 		return;
 	}
 	t = rpz_dname_to_trigger(policydname, policydnamelen);
+	if(t == RPZ_INVALID_TRIGGER) {
+		/* skipping invalid trigger */
+		free(policydname);
+		return;
+	}
 	if(t == RPZ_QNAME_TRIGGER) {
 		rpz_remove_qname_trigger(r, policydname, policydnamelen, a,
 			rr_type, rr_class, rdatawl, rdatalen);
 	} else if(t == RPZ_RESPONSE_IP_TRIGGER) {
 		rpz_remove_response_ip_trigger(r, policydname, policydnamelen,
 			a, rr_type, rdatawl, rdatalen);
+	} else if(t == RPZ_CLIENT_IP_TRIGGER) {
+		rpz_remove_clientip_trigger(r, policydname, policydnamelen, a,
+			rr_type, rdatawl, rdatalen);
+	} else if(t == RPZ_NSIP_TRIGGER) {
+		rpz_remove_nsip_trigger(r, policydname, policydnamelen, a,
+			rr_type, rdatawl, rdatalen);
+	} else if(t == RPZ_NSDNAME_TRIGGER) {
+		rpz_remove_nsdname_trigger(r, policydname, policydnamelen, a,
+			rr_type, rr_class, rdatawl, rdatalen);
 	}
+	/* else it was an unsupported trigger, also skipped. */
 	free(policydname);
 }
 
@@ -1563,21 +1747,6 @@ rpz_local_encode(struct module_env* env, struct query_info* qinfo,
 	return 1;
 }
 
-static struct local_rrset*
-rpz_find_synthesized_rrset(uint16_t qtype,
-	struct clientip_synthesized_rr* data)
-{
-	struct local_rrset* cursor = data->data;
-	while( cursor != NULL) {
-		struct packed_rrset_key* packed_rrset = &cursor->rrset->rk;
-		if(htons(qtype) == packed_rrset->type) {
-			return cursor;
-		}
-		cursor = cursor->next;
-	}
-	return NULL;
-}
-
 /** allocate SOA record ubrrsetkey in region */
 static struct ub_packed_rrset_key*
 make_soa_ubrrset(struct auth_zone* auth_zone, struct auth_rrset* soa,
@@ -1713,7 +1882,8 @@ rpz_synthesize_nodata(struct rpz* ATTR_UNUSED(r), struct module_qstate* ms,
 					     0, /* ns */
 					     0, /* ar */
 					     0, /* total */
-					     sec_status_insecure);
+					     sec_status_insecure,
+					     LDNS_EDE_NONE);
 	if(msg->rep)
 		msg->rep->authoritative = 1;
 	if(!rpz_add_soa(msg->rep, ms, az))
@@ -1742,7 +1912,8 @@ rpz_synthesize_nxdomain(struct rpz* r, struct module_qstate* ms,
 					     0, /* ns */
 					     0, /* ar */
 					     0, /* total */
-					     sec_status_insecure);
+					     sec_status_insecure,
+					     LDNS_EDE_NONE);
 	if(msg->rep)
 		msg->rep->authoritative = 1;
 	if(!rpz_add_soa(msg->rep, ms, az))
@@ -1772,7 +1943,8 @@ rpz_synthesize_localdata_from_rrset(struct rpz* ATTR_UNUSED(r), struct module_qs
                                                    0, /* ns */
                                                    0, /* ar */
                                                    1, /* total */
-                                                   sec_status_insecure);
+                                                   sec_status_insecure,
+                                                   LDNS_EDE_NONE);
 	if(new_reply_info == NULL) {
 		log_err("out of memory");
 		return NULL;
diff --git a/contrib/unbound/services/rpz.h b/contrib/unbound/services/rpz.h
index 53781197aeec..e6d8bf566e16 100644
--- a/contrib/unbound/services/rpz.h
+++ b/contrib/unbound/services/rpz.h
@@ -84,10 +84,11 @@ enum rpz_action {
 	RPZ_CNAME_OVERRIDE_ACTION, /* RPZ CNAME action override*/
 };
 
-struct clientip_synthesized_rrset{
+struct clientip_synthesized_rrset {
 	struct regional* region;
 	struct rbtree_type entries;
-	lock_rw_type lock;	/* lock on the respip tree */
+	/** lock on the entries tree */
+	lock_rw_type lock;
 };
 
 struct clientip_synthesized_rr {
@@ -95,10 +96,6 @@ struct clientip_synthesized_rr {
 	struct addr_tree_node node;
 	/** lock on the node item */
 	lock_rw_type lock;
-	/** tag bitlist */
-	uint8_t* taglist;
-	/** length of the taglist (in bytes) */
-	size_t taglen;
 	/** action for this address span */
 	enum rpz_action action;
 	/** "local data" for this node */
@@ -152,6 +149,7 @@ int rpz_insert_rr(struct rpz* r, uint8_t* azname, size_t aznamelen, uint8_t* dna
 /**
  * Delete policy matching RR, used for IXFR.
  * @param r: the rpz to add the policy to.
+ * @param azname: dname of the auth-zone
  * @param aznamelen: the length of the auth-zone name
  * @param dname: dname of the RR
  * @param dnamelen: length of the dname
@@ -160,9 +158,9 @@ int rpz_insert_rr(struct rpz* r, uint8_t* azname, size_t aznamelen, uint8_t* dna
  * @param rdatawl: rdata of the RR, prepended with the rdata size
  * @param rdatalen: length if the RR, including the prepended rdata size
  */
-void rpz_remove_rr(struct rpz* r, size_t aznamelen, uint8_t* dname,
-	size_t dnamelen, uint16_t rr_type, uint16_t rr_class, uint8_t* rdatawl,
-	size_t rdatalen);
+void rpz_remove_rr(struct rpz* r, uint8_t* azname, size_t aznamelen,
+	uint8_t* dname, size_t dnamelen, uint16_t rr_type, uint16_t rr_class,
+	uint8_t* rdatawl, size_t rdatalen);
 
 /**
  * Walk over the RPZ zones to find and apply a QNAME trigger policy.
diff --git a/contrib/unbound/sldns/rrdef.c b/contrib/unbound/sldns/rrdef.c
index 322eff096c03..e81ebb1fc434 100644
--- a/contrib/unbound/sldns/rrdef.c
+++ b/contrib/unbound/sldns/rrdef.c
@@ -702,7 +702,11 @@ sldns_get_rr_type_by_name(const char *name)
 
 	/* TYPEXX representation */
 	if (strlen(name) > 4 && strncasecmp(name, "TYPE", 4) == 0) {
-		return atoi(name + 4);
+		unsigned int a = atoi(name + 4);
+		if (a > LDNS_RR_TYPE_LAST) {
+			return (enum sldns_enum_rr_type)0;
+		}
+		return a;
 	}
 
 	/* Normal types */
@@ -740,7 +744,11 @@ sldns_get_rr_class_by_name(const char *name)
 
 	/* CLASSXX representation */
 	if (strlen(name) > 5 && strncasecmp(name, "CLASS", 5) == 0) {
-		return atoi(name + 5);
+		unsigned int a = atoi(name + 5);
+		if (a > LDNS_RR_CLASS_LAST) {
+			return (enum sldns_enum_rr_class)0;
+		}
+		return a;
 	}
 
 	/* Normal types */
diff --git a/contrib/unbound/sldns/rrdef.h b/contrib/unbound/sldns/rrdef.h
index 98fb257dc8cd..f277fd67ab5a 100644
--- a/contrib/unbound/sldns/rrdef.h
+++ b/contrib/unbound/sldns/rrdef.h
@@ -433,10 +433,12 @@ enum sldns_enum_edns_option
 	LDNS_EDNS_DHU = 6, /* RFC6975 */
 	LDNS_EDNS_N3U = 7, /* RFC6975 */
 	LDNS_EDNS_CLIENT_SUBNET = 8, /* RFC7871 */
+	LDNS_EDNS_COOKIE = 10, /* RFC7873 */
 	LDNS_EDNS_KEEPALIVE = 11, /* draft-ietf-dnsop-edns-tcp-keepalive*/
 	LDNS_EDNS_PADDING = 12, /* RFC7830 */
 	LDNS_EDNS_EDE = 15, /* RFC8914 */
-	LDNS_EDNS_CLIENT_TAG = 16 /* draft-bellis-dnsop-edns-tags-01 */
+	LDNS_EDNS_CLIENT_TAG = 16, /* draft-bellis-dnsop-edns-tags-01 */
+	LDNS_EDNS_UNBOUND_CACHEDB_TESTFRAME_TEST = 65534
 };
 typedef enum sldns_enum_edns_option sldns_edns_option;
 
@@ -482,6 +484,9 @@ typedef enum sldns_enum_ede_code sldns_ede_code;
 #define LDNS_TSIG_ERROR_BADNAME  20
 #define LDNS_TSIG_ERROR_BADALG   21
 
+/** DNS Cookie extended rcode */
+#define LDNS_EXT_RCODE_BADCOOKIE 23
+
 /**
  * Contains all information about resource record types.
  *
diff --git a/contrib/unbound/sldns/str2wire.c b/contrib/unbound/sldns/str2wire.c
index 303d49ba6689..45e247613745 100644
--- a/contrib/unbound/sldns/str2wire.c
+++ b/contrib/unbound/sldns/str2wire.c
@@ -357,7 +357,7 @@ rrinternal_get_delims(sldns_rdf_type rdftype, size_t r_cnt, size_t r_max)
 					break;
 	default                       :	break;
 	}
-	return "\n\t "; 
+	return "\n\t ";
 }
 
 /* Syntactic sugar for sldns_rr_new_frm_str_internal */
@@ -448,7 +448,7 @@ rrinternal_parse_unknown(sldns_buffer* strbuf, char* token, size_t token_len,
 			sldns_buffer_position(strbuf));
 	}
 	hex_data_size = (size_t)atoi(token);
-	if(hex_data_size > LDNS_MAX_RDFLEN || 
+	if(hex_data_size > LDNS_MAX_RDFLEN ||
 		*rr_cur_len + hex_data_size > *rr_len) {
 		return RET_ERR(LDNS_WIREPARSE_ERR_BUFFER_TOO_SMALL,
 			sldns_buffer_position(strbuf));
@@ -567,7 +567,7 @@ sldns_parse_rdf_token(sldns_buffer* strbuf, char* token, size_t token_len,
 	/* check if not quoted yet, and we have encountered quotes */
 	if(!*quoted && sldns_rdf_type_maybe_quoted(rdftype) &&
 		slen >= 2 &&
-		(token[0] == '"' || token[0] == '\'') && 
+		(token[0] == '"' || token[0] == '\'') &&
 		(token[slen-1] == '"' || token[slen-1] == '\'')) {
 		/* move token two smaller (quotes) with endnull */
 		memmove(token, token+1, slen-2);
@@ -698,7 +698,7 @@ static int sldns_str2wire_check_svcbparams(uint8_t* rdata, uint16_t rdata_len)
 				mandatory = svcparams[i];
 		}
 
-		/* 4. verify that all the SvcParamKeys in mandatory are present */
+		/* Verify that all the SvcParamKeys in mandatory are present */
 		if(mandatory) {
 			/* Divide by sizeof(uint16_t)*/
 			uint16_t mandatory_nkeys = sldns_read_uint16(mandatory + 2) / sizeof(uint16_t);
@@ -785,7 +785,7 @@ rrinternal_parse_rdata(sldns_buffer* strbuf, char* token, size_t token_len,
 			token[2]=='\t')) {
 			was_unknown_rr_format = 1;
 			if((status=rrinternal_parse_unknown(strbuf, token,
-				token_len, rr, rr_len, &rr_cur_len, 
+				token_len, rr, rr_len, &rr_cur_len,
 				pre_data_pos)) != 0)
 				return status;
 		} else if(token_strlen > 0 || quoted) {
@@ -844,7 +844,7 @@ rrinternal_parse_rdata(sldns_buffer* strbuf, char* token, size_t token_len,
 	if (rr_type == LDNS_RR_TYPE_SVCB || rr_type == LDNS_RR_TYPE_HTTPS) {
 		size_t rdata_len = rr_cur_len - dname_len - 10;
 		uint8_t *rdata = rr+dname_len + 10;
-		
+
 		/* skip 1st rdata field SvcPriority (uint16_t) */
 		if (rdata_len < sizeof(uint16_t))
 			return LDNS_WIREPARSE_ERR_OK;
@@ -1123,36 +1123,40 @@ sldns_str2wire_svcparam_key_lookup(const char *key, size_t key_len)
 			return key_value;
 
 	} else switch (key_len) {
-	case sizeof("mandatory")-1:
-		if (!strncmp(key, "mandatory", sizeof("mandatory")-1))
-			return SVCB_KEY_MANDATORY;
-		if (!strncmp(key, "echconfig", sizeof("echconfig")-1))
-			return SVCB_KEY_ECH; /* allow "echconfig" as well as "ech" */
+	case 3:
+		if (!strncmp(key, "ech", key_len))
+			return SVCB_KEY_ECH;
 		break;
 
-	case sizeof("alpn")-1:
-		if (!strncmp(key, "alpn", sizeof("alpn")-1))
+	case 4:
+		if (!strncmp(key, "alpn", key_len))
 			return SVCB_KEY_ALPN;
-		if (!strncmp(key, "port", sizeof("port")-1))
+		if (!strncmp(key, "port", key_len))
 			return SVCB_KEY_PORT;
 		break;
 
-	case sizeof("no-default-alpn")-1:
-		if (!strncmp( key  , "no-default-alpn"
-		            , sizeof("no-default-alpn")-1))
-			return SVCB_KEY_NO_DEFAULT_ALPN;
+	case 7:
+		if (!strncmp(key, "dohpath", key_len))
+			return SVCB_KEY_DOHPATH;
 		break;
 
-	case sizeof("ipv4hint")-1:
-		if (!strncmp(key, "ipv4hint", sizeof("ipv4hint")-1))
+	case 8:
+		if (!strncmp(key, "ipv4hint", key_len))
 			return SVCB_KEY_IPV4HINT;
-		if (!strncmp(key, "ipv6hint", sizeof("ipv6hint")-1))
+		if (!strncmp(key, "ipv6hint", key_len))
 			return SVCB_KEY_IPV6HINT;
 		break;
 
-	case sizeof("ech")-1:
-		if (!strncmp(key, "ech", sizeof("ech")-1))
-			return SVCB_KEY_ECH;
+	case 9:
+		if (!strncmp(key, "mandatory", key_len))
+			return SVCB_KEY_MANDATORY;
+		if (!strncmp(key, "echconfig", key_len))
+			return SVCB_KEY_ECH; /* allow "echconfig" as well as "ech" */
+		break;
+
+	case 15:
+		if (!strncmp(key, "no-default-alpn", key_len))
+			return SVCB_KEY_NO_DEFAULT_ALPN;
 		break;
 
 	default:
@@ -1477,7 +1481,7 @@ sldns_str2wire_svcbparam_alpn_value(const char* val,
 	size_t      str_len;
 	size_t      dst_len;
 	size_t      val_len;
-	
+
 	val_len = strlen(val);
 
 	if (val_len > sizeof(unescaped_dst)) {
@@ -1511,7 +1515,34 @@ sldns_str2wire_svcbparam_alpn_value(const char* val,
 	sldns_write_uint16(rd + 2, dst_len);
 	memcpy(rd + 4, unescaped_dst, dst_len);
 	*rd_len = 4 + dst_len;
-	
+
+	return LDNS_WIREPARSE_ERR_OK;
+}
+
+static int
+sldns_str2wire_svcbparam_dohpath_value(const char* val,
+	uint8_t* rd, size_t* rd_len)
+{
+	size_t val_len;
+
+	/* RFC6570#section-2.1
+	 * "The characters outside of expressions in a URI Template string are
+	 * intended to be copied literally"
+	 * Practically this means we do not have to look for "double escapes"
+	 * like in the alpn value list.
+	 */
+
+	val_len = strlen(val);
+
+	if (*rd_len < 4 + val_len) {
+		return LDNS_WIREPARSE_ERR_BUFFER_TOO_SMALL;
+	}
+
+	sldns_write_uint16(rd, SVCB_KEY_DOHPATH);
+	sldns_write_uint16(rd + 2, val_len);
+	memcpy(rd + 4, val, val_len);
+	*rd_len = 4 + val_len;
+
 	return LDNS_WIREPARSE_ERR_OK;
 }
 
@@ -1535,6 +1566,7 @@ sldns_str2wire_svcparam_value(const char *key, size_t key_len,
 		case SVCB_KEY_PORT:
 		case SVCB_KEY_IPV4HINT:
 		case SVCB_KEY_IPV6HINT:
+		case SVCB_KEY_DOHPATH:
 			return LDNS_WIREPARSE_ERR_SVCB_MISSING_PARAM;
 #endif
 		default:
@@ -1566,6 +1598,8 @@ sldns_str2wire_svcparam_value(const char *key, size_t key_len,
 		return sldns_str2wire_svcbparam_ech_value(val, rd, rd_len);
 	case SVCB_KEY_ALPN:
 		return sldns_str2wire_svcbparam_alpn_value(val, rd, rd_len);
+	case SVCB_KEY_DOHPATH:
+		return sldns_str2wire_svcbparam_dohpath_value(val, rd, rd_len);
 	default:
 		str_len = strlen(val);
 		if (*rd_len < 4 + str_len)
@@ -1593,7 +1627,7 @@ static int sldns_str2wire_svcparam_buf(const char* str, uint8_t* rd, size_t* rd_
 	/* case: key=value */
 	if (eq_pos != NULL && eq_pos[1]) {
 		val_in = eq_pos + 1;
-		
+
 		/* unescape characters and "" blocks */
 		if (*val_in == '"') {
 			val_in++;
@@ -1610,11 +1644,11 @@ static int sldns_str2wire_svcparam_buf(const char* str, uint8_t* rd, size_t* rd_
 		}
 		*val_out = 0;
 
-		return sldns_str2wire_svcparam_value(str, eq_pos - str, 
-		                                         unescaped_val[0] ? unescaped_val : NULL, rd, rd_len);
+		return sldns_str2wire_svcparam_value(str, eq_pos - str,
+		        unescaped_val[0] ? unescaped_val : NULL, rd, rd_len);
 	}
 	/* case: key= */
-	else if (eq_pos != NULL && !(eq_pos[1])) { 
+	else if (eq_pos != NULL && !(eq_pos[1])) {
 		return sldns_str2wire_svcparam_value(str, eq_pos - str, NULL, rd, rd_len);
 	}
 	/* case: key */
diff --git a/contrib/unbound/sldns/str2wire.h b/contrib/unbound/sldns/str2wire.h
index baee4236fe55..5e4d146d3092 100644
--- a/contrib/unbound/sldns/str2wire.h
+++ b/contrib/unbound/sldns/str2wire.h
@@ -38,7 +38,8 @@ struct sldns_struct_lookup_table;
 #define SVCB_KEY_IPV4HINT		4
 #define SVCB_KEY_ECH			5
 #define SVCB_KEY_IPV6HINT		6
-#define SVCPARAMKEY_COUNT		7
+#define SVCB_KEY_DOHPATH		7
+#define SVCPARAMKEY_COUNT		8
 
 #define MAX_NUMBER_OF_SVCPARAMS	64
 
@@ -236,6 +237,7 @@ uint8_t* sldns_wirerr_get_rdatawl(uint8_t* rr, size_t len, size_t dname_len);
 #define LDNS_WIREPARSE_ERR_SVCB_NO_DEFAULT_ALPN_VALUE 385
 #define LDNS_WIREPARSE_ERR_SVCPARAM_BROKEN_RDATA 386
 
+
 /**
  * Get reference to a constant string for the (parse) error.
  * @param e: error return value
diff --git a/contrib/unbound/sldns/wire2str.c b/contrib/unbound/sldns/wire2str.c
index 74d1b62dfe8d..e6278ff560da 100644
--- a/contrib/unbound/sldns/wire2str.c
+++ b/contrib/unbound/sldns/wire2str.c
@@ -159,7 +159,7 @@ static sldns_lookup_table sldns_wireparse_errors_data[] = {
 		"Mandatory SvcParamKey is missing"},
 	{ LDNS_WIREPARSE_ERR_SVCB_MANDATORY_DUPLICATE_KEY,
 		"Keys in SvcParam mandatory MUST be unique" },
-	{ LDNS_WIREPARSE_ERR_SVCB_MANDATORY_IN_MANDATORY, 
+	{ LDNS_WIREPARSE_ERR_SVCB_MANDATORY_IN_MANDATORY,
 		"mandatory MUST not be included as mandatory parameter" },
 	{ LDNS_WIREPARSE_ERR_SVCB_PORT_VALUE_SYNTAX,
 		"Could not parse port SvcParamValue" },
@@ -224,7 +224,7 @@ sldns_lookup_table* sldns_tsig_errors = sldns_tsig_errors_data;
 /* draft-ietf-dnsop-svcb-https-06: 6. Initial SvcParamKeys */
 const char *svcparamkey_strs[] = {
 	"mandatory", "alpn", "no-default-alpn", "port",
-	"ipv4hint", "ech", "ipv6hint"
+	"ipv4hint", "ech", "ipv6hint", "dohpath"
 };
 
 char* sldns_wire2str_pkt(uint8_t* data, size_t len)
@@ -487,7 +487,7 @@ int sldns_wire2str_rr_scan(uint8_t** d, size_t* dlen, char** s, size_t* slen,
 	uint8_t* rr = *d;
 	size_t rrlen = *dlen, dname_off, rdlen, ordlen;
 	uint16_t rrtype = 0;
-	
+
 	if(*dlen >= 3 && (*d)[0]==0 &&
 		sldns_read_uint16((*d)+1)==LDNS_RR_TYPE_OPT) {
 		/* perform EDNS OPT processing */
@@ -1119,7 +1119,7 @@ static int sldns_wire2str_svcparam_alpn2str(char** s,
 			w += sldns_str_print(s, slen, "%s", ",");
 	}
 	w += sldns_str_print(s, slen, "\"");
-	
+
 	return w;
 }
 
@@ -1139,7 +1139,7 @@ static int sldns_wire2str_svcparam_ech2str(char** s,
 	(*s) += size;
 	(*slen) -= size;
 
-	w += sldns_str_print(s, slen, "\"");	
+	w += sldns_str_print(s, slen, "\"");
 
 	return w + size;
 }
@@ -1162,7 +1162,7 @@ int sldns_wire2str_svcparam_scan(uint8_t** d, size_t* dlen, char** s, size_t* sl
 
 	/* verify that we have data_len data */
 	if (data_len > *dlen)
-		return -1; 
+		return -1;
 
 	written_chars += sldns_print_svcparamkey(s, slen, svcparamkey);
 	if (!data_len) {
@@ -1174,6 +1174,7 @@ int sldns_wire2str_svcparam_scan(uint8_t** d, size_t* dlen, char** s, size_t* sl
 	 	case SVCB_KEY_IPV4HINT:
 	 	case SVCB_KEY_IPV6HINT:
 	 	case SVCB_KEY_MANDATORY:
+	 	case SVCB_KEY_DOHPATH:
 	 		return -1;
 	 	default:
 	 		return written_chars;
@@ -1201,6 +1202,8 @@ int sldns_wire2str_svcparam_scan(uint8_t** d, size_t* dlen, char** s, size_t* sl
 	case SVCB_KEY_ECH:
 		r = sldns_wire2str_svcparam_ech2str(s, slen, data_len, *d);
 		break;
+	case SVCB_KEY_DOHPATH:
+		/* fallthrough */
 	default:
 		r = sldns_str_print(s, slen, "=\"");
 
@@ -1222,7 +1225,7 @@ int sldns_wire2str_svcparam_scan(uint8_t** d, size_t* dlen, char** s, size_t* sl
 	}
 	if (r <= 0)
 		return -1; /* wireformat error */
-	
+
 	written_chars += r;
 	*d    += data_len;
 	*dlen -= data_len;
@@ -1551,7 +1554,7 @@ int sldns_wire2str_nsec_scan(uint8_t** d, size_t* dl, char** s, size_t* sl)
 	unsigned i, bit, window, block_len;
 	uint16_t t;
 	int w = 0;
-	
+
 	/* check for errors */
 	while(pl) {
 		if(pl < 2) return -1;
diff --git a/contrib/unbound/smallapp/unbound-anchor.c b/contrib/unbound/smallapp/unbound-anchor.c
index 027980be117a..e60831c2e160 100644
--- a/contrib/unbound/smallapp/unbound-anchor.c
+++ b/contrib/unbound/smallapp/unbound-anchor.c
@@ -1582,8 +1582,7 @@ xml_parse_setup(XML_Parser parser, struct xml_data* data, time_t now)
 
 /**
  * Perform XML parsing of the root-anchors file
- * Its format description can be read here
- * https://data.iana.org/root-anchors/draft-icann-dnssec-trust-anchor.txt
+ * Its format description can be found in RFC 7958.
  * It uses libexpat.
  * @param xml: BIO with xml data.
  * @param now: the current time for checking DS validity periods.
diff --git a/contrib/unbound/smallapp/unbound-checkconf.c b/contrib/unbound/smallapp/unbound-checkconf.c
index f6e55367790e..f03cc7c2e6ba 100644
--- a/contrib/unbound/smallapp/unbound-checkconf.c
+++ b/contrib/unbound/smallapp/unbound-checkconf.c
@@ -714,7 +714,7 @@ morechecks(struct config_file* cfg)
 			cfg->chrootdir, cfg);
 	}
 #endif
-	/* remove chroot setting so that modules are not stripping pathnames*/
+	/* remove chroot setting so that modules are not stripping pathnames */
 	free(cfg->chrootdir);
 	cfg->chrootdir = NULL;
 
diff --git a/contrib/unbound/smallapp/unbound-control.c b/contrib/unbound/smallapp/unbound-control.c
index 60455bf43b8b..54ff42f6ccc3 100644
--- a/contrib/unbound/smallapp/unbound-control.c
+++ b/contrib/unbound/smallapp/unbound-control.c
@@ -4,22 +4,22 @@
  * Copyright (c) 2008, NLnet Labs. All rights reserved.
  *
  * This software is open source.
- * 
+ *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
- * 
+ *
  * Redistributions of source code must retain the above copyright notice,
  * this list of conditions and the following disclaimer.
- * 
+ *
  * Redistributions in binary form must reproduce the above copyright notice,
  * this list of conditions and the following disclaimer in the documentation
  * and/or other materials provided with the distribution.
- * 
+ *
  * Neither the name of the NLNET LABS nor the names of its contributors may
  * be used to endorse or promote products derived from this software without
  * specific prior written permission.
- * 
+ *
  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
@@ -59,6 +59,7 @@
 #include "util/locks.h"
 #include "util/net_help.h"
 #include "util/shm_side/shm_main.h"
+#include "util/timeval_func.h"
 #include "daemon/stats.h"
 #include "sldns/wire2str.h"
 #include "sldns/pkthdr.h"
@@ -186,31 +187,6 @@ usage(void)
 #ifdef HAVE_SHMGET
 /** what to put on statistics lines between var and value, ": " or "=" */
 #define SQ "="
-/** divide sum of timers to get average */
-static void
-timeval_divide(struct timeval* avg, const struct timeval* sum, long long d)
-{
-#ifndef S_SPLINT_S
-	size_t leftover;
-	if(d <= 0) {
-		avg->tv_sec = 0;
-		avg->tv_usec = 0;
-		return;
-	}
-	avg->tv_sec = sum->tv_sec / d;
-	avg->tv_usec = sum->tv_usec / d;
-	/* handle fraction from seconds divide */
-	leftover = sum->tv_sec - avg->tv_sec*d;
-	if(leftover <= 0)
-		leftover = 0;
-	avg->tv_usec += (((long long)leftover)*((long long)1000000))/d;
-	if(avg->tv_sec < 0)
-		avg->tv_sec = 0;
-	if(avg->tv_usec < 0)
-		avg->tv_usec = 0;
-#endif
-}
-
 /** print unsigned long stats value */
 #define PR_UL_NM(str, var) printf("%s."str SQ"%lu\n", nm, (unsigned long)(var));
 #define PR_UL(str, var) printf(str SQ"%lu\n", (unsigned long)(var));
@@ -226,12 +202,20 @@ static void pr_stats(const char* nm, struct ub_stats_info* s)
 {
 	struct timeval sumwait, avg;
 	PR_UL_NM("num.queries", s->svr.num_queries);
-	PR_UL_NM("num.queries_ip_ratelimited", 
+	PR_UL_NM("num.queries_ip_ratelimited",
 		s->svr.num_queries_ip_ratelimited);
+	PR_UL_NM("num.queries_cookie_valid",
+		s->svr.num_queries_cookie_valid);
+	PR_UL_NM("num.queries_cookie_client",
+		s->svr.num_queries_cookie_client);
+	PR_UL_NM("num.queries_cookie_invalid",
+		s->svr.num_queries_cookie_invalid);
 	PR_UL_NM("num.cachehits",
 		s->svr.num_queries - s->svr.num_queries_missed_cache);
 	PR_UL_NM("num.cachemiss", s->svr.num_queries_missed_cache);
 	PR_UL_NM("num.prefetch", s->svr.num_queries_prefetch);
+	PR_UL_NM("num.queries_timed_out", s->svr.num_queries_timed_out);
+	PR_UL_NM("query.queue_time_us.max", s->svr.max_query_time_us);
 	PR_UL_NM("num.expired", s->svr.ans_expired);
 	PR_UL_NM("num.recursivereplies", s->mesh_replies_sent);
 #ifdef USE_DNSCRYPT
@@ -403,6 +387,9 @@ static void print_extended(struct ub_stats_info* s, int inhibit_zero)
 	PR_UL("rrset.cache.count", s->svr.rrset_cache_count);
 	PR_UL("infra.cache.count", s->svr.infra_cache_count);
 	PR_UL("key.cache.count", s->svr.key_cache_count);
+	/* max collisions */
+	PR_UL("msg.cache.max_collisions", s->svr.msg_cache_max_collisions);
+	PR_UL("rrset.cache.max_collisions", s->svr.rrset_cache_max_collisions);
 	/* applied RPZ actions */
 	for(i=0; i<UB_STATS_RPZ_ACTION_NUM; i++) {
 		if(i == RPZ_NO_OVERRIDE_ACTION)
@@ -426,6 +413,9 @@ static void print_extended(struct ub_stats_info* s, int inhibit_zero)
 	PR_UL("num.query.subnet", s->svr.num_query_subnet);
 	PR_UL("num.query.subnet_cache", s->svr.num_query_subnet_cache);
 #endif
+#ifdef USE_CACHEDB
+	PR_UL("num.query.cachedb", s->svr.num_query_cachedb);
+#endif
 }
 
 /** print statistics out of memory structures */
@@ -989,7 +979,7 @@ int main(int argc, char* argv[])
 		fatal_exit("could not exec unbound: %s",
 			strerror(ENOSYS));
 #else
-		if(execlp("unbound", "unbound", "-c", cfgfile, 
+		if(execlp("unbound", "unbound", "-c", cfgfile,
 			(char*)NULL) < 0) {
 			fatal_exit("could not exec unbound: %s",
 				strerror(errno));
diff --git a/contrib/unbound/smallapp/unbound-host.c b/contrib/unbound/smallapp/unbound-host.c
index d612575f3af2..8bffe46ced55 100644
--- a/contrib/unbound/smallapp/unbound-host.c
+++ b/contrib/unbound/smallapp/unbound-host.c
@@ -482,6 +482,7 @@ int main(int argc, char* argv[])
 		case '?':
 		case 'h':
 		default:
+			ub_ctx_delete(ctx);
 			usage();
 		}
 	}
@@ -495,8 +496,10 @@ int main(int argc, char* argv[])
 	}
 	argc -= optind;
 	argv += optind;
-	if(argc != 1)
+	if(argc != 1) {
+		ub_ctx_delete(ctx);
 		usage();
+	}
 
 #ifdef HAVE_SSL
 #ifdef HAVE_ERR_LOAD_CRYPTO_STRINGS
diff --git a/contrib/unbound/testdata/00-lint.tdir/00-lint.pre b/contrib/unbound/testdata/00-lint.tdir/00-lint.pre
new file mode 100644
index 000000000000..507f5e1e9454
--- /dev/null
+++ b/contrib/unbound/testdata/00-lint.tdir/00-lint.pre
@@ -0,0 +1,14 @@
+# #-- 00-lint.pre--#
+# source the master var file when it's there
+[ -f ../.tpkg.var.master ] && source ../.tpkg.var.master
+# use .tpkg.var.test for in test variable passing
+[ -f .tpkg.var.test ] && source .tpkg.var.test
+
+. ../common.sh
+PRE="../.."
+
+if test -f $PRE/unbound_test_00-lint ; then
+    echo test enabled
+else
+    skip_test "test skipped; clang linter preferred over splint"
+fi
diff --git a/contrib/unbound/testdata/cachedb_cached_ede.crpl b/contrib/unbound/testdata/cachedb_cached_ede.crpl
new file mode 100644
index 000000000000..5eade545105f
--- /dev/null
+++ b/contrib/unbound/testdata/cachedb_cached_ede.crpl
@@ -0,0 +1,91 @@
+; config options
+server:
+	target-fetch-policy: "0 0 0 0 0"
+	qname-minimisation: no
+	minimal-responses: no
+	module-config: "cachedb validator iterator"
+	trust-anchor-signaling: no
+	verbosity: 4
+	ede: yes
+	val-log-level: 2
+        trust-anchor: "example.nl. DS 50602 8 2 FA8EE175C47325F4BD46D8A4083C3EBEB11C977D689069F2B41F1A29B22446B1"
+	
+
+cachedb:
+	backend: "testframe"
+	secret-seed: "testvalue"
+
+stub-zone:
+	name: "example.nl"
+	stub-addr: 193.0.14.129
+CONFIG_END
+
+SCENARIO_BEGIN Test cachedb support for caching EDEs.
+
+RANGE_BEGIN 0 10
+	ADDRESS 193.0.14.129
+ENTRY_BEGIN
+MATCH opcode qtype qname
+ADJUST copy_id
+REPLY QR AA NOERROR
+SECTION QUESTION
+example.nl.	IN	DNSKEY
+SECTION ANSWER
+ENTRY_END
+
+ENTRY_BEGIN
+MATCH opcode qtype qname
+ADJUST copy_id
+REPLY QR AA NOERROR
+SECTION QUESTION
+example.nl.	IN	A
+SECTION ANSWER
+example.nl.	IN	A	1.2.3.4
+ENTRY_END
+RANGE_END
+
+; get the entry in cache.
+STEP 1 QUERY
+ENTRY_BEGIN
+REPLY RD DO
+SECTION QUESTION
+example.nl. IN A
+SECTION ADDITIONAL
+	HEX_EDNSDATA_BEGIN
+		FF FE 		; option code = 65534 (LDNS_EDNS_UNBOUND_CACHEDB_TESTFRAME_TEST)
+		00 00 		; option length
+	HEX_EDNSDATA_END
+ENTRY_END
+
+; get the answer for it
+STEP 10 CHECK_ANSWER
+ENTRY_BEGIN
+MATCH all ede=9
+REPLY QR RD RA DO SERVFAIL
+SECTION QUESTION
+example.nl. IN A
+ENTRY_END
+
+; query again for the cached entry
+STEP 20 QUERY
+ENTRY_BEGIN
+REPLY RD
+SECTION QUESTION
+example.nl. IN A
+SECTION ADDITIONAL
+	HEX_EDNSDATA_BEGIN
+		FF FE 		; option code = 65534 (LDNS_EDNS_UNBOUND_CACHEDB_TESTFRAME_TEST)
+		00 00 		; option length
+	HEX_EDNSDATA_END
+ENTRY_END
+
+; this must be a cached answer since stub is not answering in this range
+STEP 30 CHECK_ANSWER
+ENTRY_BEGIN
+MATCH all ede=9
+REPLY QR RD RA DO SERVFAIL
+SECTION QUESTION
+example.nl. IN A
+ENTRY_END
+
+SCENARIO_END
diff --git a/contrib/unbound/testdata/edns_downstream_cookies.rpl b/contrib/unbound/testdata/edns_downstream_cookies.rpl
new file mode 100644
index 000000000000..820bc5a7ca70
--- /dev/null
+++ b/contrib/unbound/testdata/edns_downstream_cookies.rpl
@@ -0,0 +1,235 @@
+; config options
+server:
+	answer-cookie: yes
+	cookie-secret: "000102030405060708090a0b0c0d0e0f"
+	access-control: 127.0.0.1 allow_cookie
+	access-control: 1.2.3.4 allow
+	local-data: "test. TXT test"
+
+CONFIG_END
+
+SCENARIO_BEGIN Test downstream DNS Cookies
+
+; Note: When a valid hash was required, it was generated by running this test
+; with an invalid one and checking the output for the valid one.
+; Actual hash generation is tested with unit tests.
+
+; Query without a client cookie ...
+STEP 0 QUERY
+ENTRY_BEGIN
+REPLY RD
+SECTION QUESTION
+test. IN TXT
+ENTRY_END
+; ... get TC and refused
+STEP 1 CHECK_ANSWER
+ENTRY_BEGIN
+MATCH all
+REPLY QR RD RA TC REFUSED
+SECTION QUESTION
+test. IN TXT
+ENTRY_END
+
+; Query without a client cookie on TCP ...
+STEP 10 QUERY
+ENTRY_BEGIN
+REPLY RD
+MATCH TCP
+SECTION QUESTION
+test. IN TXT
+ENTRY_END
+; ... get an answer
+STEP 11 CHECK_ANSWER
+ENTRY_BEGIN
+MATCH all
+REPLY QR RD RA AA NOERROR
+SECTION QUESTION
+test. IN TXT
+SECTION ANSWER
+test. IN TXT "test"
+ENTRY_END
+
+; Query with only a client cookie ...
+STEP 20 QUERY
+ENTRY_BEGIN
+REPLY RD
+SECTION QUESTION
+test. IN TXT
+SECTION ADDITIONAL
+HEX_EDNSDATA_BEGIN
+	00 0a			; Opcode 10
+	00 08			; Length 8
+	31 32 33 34 35 36 37 38	; Random bits
+HEX_EDNSDATA_END
+ENTRY_END
+; ... get BADCOOKIE and a new cookie
+STEP 21 CHECK_ANSWER
+ENTRY_BEGIN
+MATCH all server_cookie
+REPLY QR RD RA DO YXRRSET	; BADCOOKIE is an extended rcode
+SECTION QUESTION
+test. IN TXT
+ENTRY_END
+
+; Query with an invalid cookie ...
+STEP 30 QUERY
+ENTRY_BEGIN
+REPLY RD
+SECTION QUESTION
+test. IN TXT
+SECTION ADDITIONAL
+HEX_EDNSDATA_BEGIN
+	00 0a			; Opcode 10
+	00 18			; Length 24
+	31 32 33 34 35 36 37 38	; Random bits
+	02 00 00 00		; wrong version
+	00 00 00 00		; Timestamp
+	31 32 33 34 35 36 37 38	; wrong hash
+HEX_EDNSDATA_END
+ENTRY_END
+; ... get BADCOOKIE and a new cookie
+STEP 31 CHECK_ANSWER
+ENTRY_BEGIN
+MATCH all server_cookie
+REPLY QR RD RA DO YXRRSET	; BADCOOKIE is an extended rcode
+SECTION QUESTION
+test. IN TXT
+ENTRY_END
+
+; Query with an invalid cookie from a non-cookie protected address ...
+STEP 40 QUERY ADDRESS 1.2.3.4
+ENTRY_BEGIN
+REPLY RD
+SECTION QUESTION
+test. IN TXT
+SECTION ADDITIONAL
+HEX_EDNSDATA_BEGIN
+	00 0a			; Opcode 10
+	00 18			; Length 24
+	31 32 33 34 35 36 37 38	; Random bits
+	02 00 00 00		; wrong version
+	00 00 00 00		; Timestamp
+	31 32 33 34 35 36 37 38	; wrong hash
+HEX_EDNSDATA_END
+ENTRY_END
+; ... get answer and a cookie
+STEP 41 CHECK_ANSWER
+ENTRY_BEGIN
+MATCH all server_cookie
+REPLY QR RD RA AA DO NOERROR
+SECTION QUESTION
+test. IN TXT
+SECTION ANSWER
+test. IN TXT "test"
+ENTRY_END
+
+; Query with a valid cookie ...
+STEP 50 QUERY
+ENTRY_BEGIN
+REPLY RD
+SECTION QUESTION
+test. IN TXT
+SECTION ADDITIONAL
+HEX_EDNSDATA_BEGIN
+	00 0a			; Opcode 10
+	00 18			; Length 24
+	31 32 33 34 35 36 37 38	; Random bits
+	01 00 00 00		; Version/Reserved
+	00 00 00 00		; Timestamp
+	38 52 7b a8 c6 a4 ea 96	; Hash
+HEX_EDNSDATA_END
+ENTRY_END
+; ... get answer and the cookie
+STEP 51 CHECK_ANSWER
+ENTRY_BEGIN
+MATCH all server_cookie
+REPLY QR RD RA AA DO NOERROR
+SECTION QUESTION
+test. IN TXT
+SECTION ANSWER
+test. IN TXT "test"
+ENTRY_END
+
+; Query with a valid >30 minutes old cookie ...
+STEP 59 TIME_PASSES ELAPSE 1801
+STEP 60 QUERY
+ENTRY_BEGIN
+REPLY RD
+SECTION QUESTION
+test. IN TXT
+SECTION ADDITIONAL
+HEX_EDNSDATA_BEGIN
+	00 0a			; Opcode 10
+	00 18			; Length 24
+	31 32 33 34 35 36 37 38	; Random bits
+	01 00 00 00		; Version/Reserved
+	00 00 00 00		; Timestamp
+	38 52 7b a8 c6 a4 ea 96	; Hash
+HEX_EDNSDATA_END
+ENTRY_END
+; ... Get answer and a refreshed cookie
+;     (we don't check the re-freshness here; it has its own unit test)
+STEP 61 CHECK_ANSWER
+ENTRY_BEGIN
+MATCH all server_cookie
+REPLY QR RD RA AA DO NOERROR
+SECTION QUESTION
+test. IN TXT
+SECTION ANSWER
+test. IN TXT "test"
+ENTRY_END
+
+; Query with a hash-valid >60 minutes old cookie ...
+STEP 69 TIME_PASSES ELAPSE 3601
+STEP 70 QUERY
+ENTRY_BEGIN
+REPLY RD
+SECTION QUESTION
+test. IN TXT
+SECTION ADDITIONAL
+HEX_EDNSDATA_BEGIN
+	00 0a			; Opcode 10
+	00 18			; Length 24
+	31 32 33 34 35 36 37 38	; Random bits
+	01 00 00 00		; Version/Reserved
+	00 00 07 09		; Timestamp (1801)
+	77 81 38 e3 8f aa 72 86	; Hash
+HEX_EDNSDATA_END
+ENTRY_END
+; ... get BADCOOKIE and a new cookie
+STEP 71 CHECK_ANSWER
+ENTRY_BEGIN
+MATCH all server_cookie
+REPLY QR RD RA DO YXRRSET	; BADCOOKIE is an extended rcode
+SECTION QUESTION
+test. IN TXT
+ENTRY_END
+
+; Query with a valid future (<5 minutes) cookie ...
+STEP 80 QUERY
+ENTRY_BEGIN
+REPLY RD
+SECTION QUESTION
+test. IN TXT
+SECTION ADDITIONAL
+HEX_EDNSDATA_BEGIN
+	00 0a			; Opcode 10
+	00 18			; Length 24
+	31 32 33 34 35 36 37 38	; Random bits
+	01 00 00 00		; Version/Reserved
+	00 00 16 45		; Timestamp (1801 + 3601 + 299)
+	4a f5 0f df f0 e8 c7 09	; Hash
+HEX_EDNSDATA_END
+ENTRY_END
+; ... get an answer
+STEP 81 CHECK_ANSWER
+ENTRY_BEGIN
+MATCH all server_cookie
+REPLY QR RD RA AA DO NOERROR
+SECTION QUESTION
+test. IN TXT
+SECTION ANSWER
+test. IN TXT "test"
+ENTRY_END
+
+SCENARIO_END
diff --git a/contrib/unbound/testdata/ip_ratelimit.tdir/ip_ratelimit.conf b/contrib/unbound/testdata/ip_ratelimit.tdir/ip_ratelimit.conf
new file mode 100644
index 000000000000..ae7d0cda0d9d
--- /dev/null
+++ b/contrib/unbound/testdata/ip_ratelimit.tdir/ip_ratelimit.conf
@@ -0,0 +1,28 @@
+server:
+	verbosity: 5
+	# num-threads: 1
+	interface: 127.0.0.1
+	port: @PORT@
+	use-syslog: no
+	directory: .
+	pidfile: "unbound.pid"
+	chroot: ""
+	username: ""
+	local-data: "test. IN TXT localdata"
+
+	ip-ratelimit: 1
+	ip-ratelimit-cookie: 0
+	ip-ratelimit-factor: 0
+	ip-ratelimit-backoff: yes
+	answer-cookie: yes
+	access-control: 127.0.0.0/8 allow_cookie
+
+remote-control:
+	control-enable: yes
+	control-interface: 127.0.0.1
+	# control-interface: ::1
+	control-port: @CONTROL_PORT@
+	server-key-file: "unbound_server.key"
+	server-cert-file: "unbound_server.pem"
+	control-key-file: "unbound_control.key"
+	control-cert-file: "unbound_control.pem"
diff --git a/contrib/unbound/testdata/ip_ratelimit.tdir/ip_ratelimit.dsc b/contrib/unbound/testdata/ip_ratelimit.tdir/ip_ratelimit.dsc
new file mode 100644
index 000000000000..a6f6192360cd
--- /dev/null
+++ b/contrib/unbound/testdata/ip_ratelimit.tdir/ip_ratelimit.dsc
@@ -0,0 +1,16 @@
+BaseName: ip_ratelimit
+Version: 1.0
+Description: Test IP source ratelimit.
+CreationDate: Tue Aug 8 00:00:00 CET 2023
+Maintainer: Yorgos Thessalonikefs
+Category:
+Component:
+CmdDepends:
+Depends:
+Help:
+Pre: ip_ratelimit.pre
+Post: ip_ratelimit.post
+Test: ip_ratelimit.test
+AuxFiles:
+Passed:
+Failure:
diff --git a/contrib/unbound/testdata/ip_ratelimit.tdir/ip_ratelimit.post b/contrib/unbound/testdata/ip_ratelimit.tdir/ip_ratelimit.post
new file mode 100644
index 000000000000..1f86d008587d
--- /dev/null
+++ b/contrib/unbound/testdata/ip_ratelimit.tdir/ip_ratelimit.post
@@ -0,0 +1,13 @@
+# #-- ip_ratelimit.post --#
+# source the master var file when it's there
+[ -f ../.tpkg.var.master ] && source ../.tpkg.var.master
+# source the test var file when it's there
+[ -f .tpkg.var.test ] && source .tpkg.var.test
+#
+# do your teardown here
+. ../common.sh
+kill_pid $UNBOUND_PID
+if test -f unbound.log; then
+	echo ">>> unbound log"
+	cat unbound.log
+fi
diff --git a/contrib/unbound/testdata/ip_ratelimit.tdir/ip_ratelimit.pre b/contrib/unbound/testdata/ip_ratelimit.tdir/ip_ratelimit.pre
new file mode 100644
index 000000000000..c4589a0ea4fe
--- /dev/null
+++ b/contrib/unbound/testdata/ip_ratelimit.tdir/ip_ratelimit.pre
@@ -0,0 +1,24 @@
+# #-- ip_ratelimit.pre--#
+# source the master var file when it's there
+[ -f ../.tpkg.var.master ] && source ../.tpkg.var.master
+# use .tpkg.var.test for in test variable passing
+[ -f .tpkg.var.test ] && source .tpkg.var.test
+
+PRE="../.."
+. ../common.sh
+get_random_port 2
+UNBOUND_PORT=$RND_PORT
+CONTROL_PORT=$(($RND_PORT + 1))
+echo "UNBOUND_PORT=$UNBOUND_PORT" >> .tpkg.var.test
+echo "CONTROL_PORT=$CONTROL_PORT" >> .tpkg.var.test
+
+# make config file
+sed -e 's/@PORT\@/'$UNBOUND_PORT'/' -e 's/@CONTROL_PORT\@/'$CONTROL_PORT'/' < ip_ratelimit.conf > ub.conf
+# start unbound in the background
+$PRE/unbound -d -c ub.conf >unbound.log 2>&1 &
+UNBOUND_PID=$!
+echo "UNBOUND_PID=$UNBOUND_PID" >> .tpkg.var.test
+
+wait_unbound_up unbound.log
+
+cat .tpkg.var.test
diff --git a/contrib/unbound/testdata/ip_ratelimit.tdir/ip_ratelimit.test b/contrib/unbound/testdata/ip_ratelimit.tdir/ip_ratelimit.test
new file mode 100644
index 000000000000..f58b7edcbe2a
--- /dev/null
+++ b/contrib/unbound/testdata/ip_ratelimit.tdir/ip_ratelimit.test
@@ -0,0 +1,165 @@
+# #-- ip_ratelimit.test --#
+# source the master var file when it's there
+[ -f ../.tpkg.var.master ] && source ../.tpkg.var.master
+# use .tpkg.var.test for in test variable passing
+[ -f .tpkg.var.test ] && source .tpkg.var.test
+
+PRE="../.."
+. ../common.sh
+
+get_make
+(cd $PRE; $MAKE streamtcp)
+
+# These tests rely on second time precision. To combat false negatives the
+# tests run multiple times and we allow 1/3 of the runs to fail.
+total_runs=6
+success_threshold=4  # 2/3*total_runs
+
+if dig -h 2>&1 | grep "cookie" >/dev/null; then
+	nocookie="+nocookie"
+else
+	nocookie=""
+fi
+
+echo "> First get a valid cookie"
+dig @127.0.0.1 -p $UNBOUND_PORT +ednsopt=10:0102030405060708 $nocookie +tcp +retry=0 +time=1 test. TXT >outfile 2>&1
+if test "$?" -ne 0; then
+	echo "exit status not OK"
+	echo "> cat logfiles"
+	cat outfile
+	cat unbound.log
+	echo "Not OK"
+	exit 1
+fi
+if test `grep "COOKIE: " outfile | wc -l` -ne 1; then
+	echo "Could not get cookie"
+	echo "> cat logfiles"
+	cat outfile
+	cat unbound.log
+	echo "Not OK"
+	exit 1
+fi
+cookie=`grep "COOKIE: " outfile | cut -d ' ' -f 3`
+
+successes=0
+echo "> Three parallel queries with backoff and cookie"
+# For this test we send three parallel queries. The ratelimit should be reached
+# for that second. We send a query to verify that there is no reply.
+# Then for the next second we again send three parallel queries and we expect
+# none of them to be allowed through because of the backoff logic that keeps
+# rolling the RATE_WINDOW based on demand.
+# Again we send another query but with a valid cookie and we expect to receive
+# an answer.
+for i in $(seq 1 $total_runs); do
+	# Try to hit limit
+	$PRE/streamtcp -nu -f 127.0.0.1@$UNBOUND_PORT test. TXT IN test. TXT IN test. TXT IN >outfile 2>&1
+	if test "$?" -ne 0; then
+		echo "exit status not OK"
+		echo "> cat logfiles"
+		cat outfile
+		cat unbound.log
+		echo "Not OK"
+		exit 1
+	fi
+	# Expect no answer because of limit
+	dig @127.0.0.1 -p $UNBOUND_PORT $nocookie +retry=0 +time=1 test. TXT >outfile 2>&1
+	if test "$?" -eq 0; then
+		continue
+	fi
+	# Try to keep limit
+	$PRE/streamtcp -nu -f 127.0.0.1@$UNBOUND_PORT test. TXT IN test. TXT IN test. TXT IN >outfile 2>&1
+	if test "$?" -ne 0; then
+		echo "exit status not OK"
+		echo "> cat logfiles"
+		cat outfile
+		cat unbound.log
+		echo "Not OK"
+		exit 1
+	fi
+	# Expect answer because of DNS cookie
+	dig @127.0.0.1 -p $UNBOUND_PORT +ednsopt=10:$cookie $nocookie +retry=0 +time=1 test. TXT >outfile 2>&1
+	if test "$?" -ne 0; then
+		continue
+	fi
+	((successes++))
+	# We don't have to wait for all the runs to complete if we know
+	# we passed the threshold.
+	if test $successes -ge $success_threshold; then
+		break
+	fi
+done
+
+if test $successes -ge $success_threshold; then
+	echo "Three parallel queries with backoff and cookie OK"
+else
+	echo "Three parallel queries with backoff and cookie NOT OK"
+	echo "> cat logfiles"
+	cat outfile
+	cat unbound.log
+	echo "Three parallel queries with backoff and cookie NOT OK"
+	exit 1
+fi
+
+echo "> Activating ip-ratelimit-cookie"
+echo "$PRE/unbound-control -c ub.conf set_option ip-ratelimit-cookie: 1"
+$PRE/unbound-control -c ub.conf set_option ip-ratelimit-cookie: 1
+if test $? -ne 0; then
+	echo "wrong exit value after success"
+	exit 1
+fi
+
+successes=0
+echo "> Three parallel queries with backoff and cookie with ip-ratelimit-cookie"
+# This is the exact same test as above with the exception that we don't expect
+# an answer on the last query because ip-ratelimit-cookie is now enabled.
+for i in $(seq 1 $total_runs); do
+	# Try to hit limit
+	$PRE/streamtcp -nu -f 127.0.0.1@$UNBOUND_PORT test. TXT IN test. TXT IN test. TXT IN >outfile 2>&1
+	if test "$?" -ne 0; then
+		echo "exit status not OK"
+		echo "> cat logfiles"
+		cat outfile
+		cat unbound.log
+		echo "Not OK"
+		exit 1
+	fi
+	# Expect no answer because of limit
+	dig @127.0.0.1 -p $UNBOUND_PORT $nocookie +retry=0 +time=1 test. TXT >outfile 2>&1
+	if test "$?" -eq 0; then
+		continue
+	fi
+	# Try to keep limit
+	$PRE/streamtcp -nu -f 127.0.0.1@$UNBOUND_PORT test. TXT IN test. TXT IN test. TXT IN >outfile 2>&1
+	if test "$?" -ne 0; then
+		echo "exit status not OK"
+		echo "> cat logfiles"
+		cat outfile
+		cat unbound.log
+		echo "Not OK"
+		exit 1
+	fi
+	# Expect no answer because of ip-ratelimit-cookie
+	dig @127.0.0.1 -p $UNBOUND_PORT +ednsopt=10:$cookie $nocookie +retry=0 +time=1 test. TXT >outfile 2>&1
+	if test "$?" -eq 0; then
+		continue
+	fi
+	((successes++))
+	# We don't have to wait for all the runs to complete if we know
+	# we passed the threshold.
+	if test $successes -ge $success_threshold; then
+		break
+	fi
+done
+
+if test $successes -ge $success_threshold; then
+	echo "Three parallel queries with backoff and cookie with ip-ratelimit-cookie OK"
+else
+	echo "Three parallel queries with backoff and cookie with ip-ratelimit-cookie NOT OK"
+	echo "> cat logfiles"
+	cat outfile
+	cat unbound.log
+	echo "Three parallel queries with backoff and cookie with ip-ratelimit-cookie NOT OK"
+	exit 1
+fi
+
+exit 0
diff --git a/contrib/unbound/testdata/ip_ratelimit.tdir/unbound_control.key b/contrib/unbound/testdata/ip_ratelimit.tdir/unbound_control.key
new file mode 100644
index 000000000000..753a4ef6162e
--- /dev/null
+++ b/contrib/unbound/testdata/ip_ratelimit.tdir/unbound_control.key
@@ -0,0 +1,39 @@
+-----BEGIN RSA PRIVATE KEY-----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+ahTIKAjdprnxJfYINM580j8CGbXvX5LhIlm3O267D0Op+co3+7Ujy+cjsIuFQrP+
+1MqMgXSeBjzC1APivmps7HeFE+4w0k2PfN5wSMDNCzLo99PZuUG5XZ93OVOS5dpN
+b+WskdcD8NOoJy/X/5A08veEI/jYO/DyqQKBwQDDwUQCOWf41ecvJLtBHKmEnHDz
+ftzHino9DRKG8a9XaN4rmetnoWEaM2vHGX3pf3mwH+dAe8vJdAQueDhBKYeEpm6C
+TYNOpou1+Zs5s99BilCTNYo8fkMOAyqwRwmz9zgHS6QxXuPwsghKefLJGt6o6RFF
+tfWVTfLlYJ+I3GQe3ySsk3wjVz4oUTKiyiq5+KzD+HhEkS7u+RQ7Z0ZI2xd2cF8Y
+aN2hjKDpcOiFf3CDoqka5D1qMNLgIHO52AHww1UCgcA1h7o7AMpURRka6hyaODY0
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+7/cB4522Ft0imA3+9RK/qJTZ7Bd5fC4PKjOGNtUiqW/0L2rjeIiQ40bfWvWqgPKw
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+kT0GQ8u0QPzh2tjt/2ZnIfOBrl+QYERP0MofDZDjhUdq2wECgcB0Lu841+yP5cdR
+qbJhXO4zJNh7oWNcJlOuQp3ZMNFrA1oHpe9pmLukiROOy01k9WxIMQDzU5GSqRv3
+VLkYOIcbhJ3kClKAcM3j95SkKbU2H5/RENb3Ck52xtl4pNU1x/3PnVFZfDVuuHO9
+MZ9YBcIeK98MyP2jr5JtFKnOyPE7xKq0IHIhXadpbc2wjje5FtZ1cUtMyEECCXNa
+C1TpXebHGyXGpY9WdWXhjdE/1jPvfS+uO5WyuDpYPr339gsdq1g=
+-----END RSA PRIVATE KEY-----
diff --git a/contrib/unbound/testdata/ip_ratelimit.tdir/unbound_control.pem b/contrib/unbound/testdata/ip_ratelimit.tdir/unbound_control.pem
new file mode 100644
index 000000000000..a1edf7017f1d
--- /dev/null
+++ b/contrib/unbound/testdata/ip_ratelimit.tdir/unbound_control.pem
@@ -0,0 +1,22 @@
+-----BEGIN CERTIFICATE-----
+MIIDszCCAhsCFGD5193whHQ2bVdzbaQfdf1gc4SkMA0GCSqGSIb3DQEBCwUAMBIx
+EDAOBgNVBAMMB3VuYm91bmQwHhcNMjAwNzA4MTMzMjMwWhcNNDAwMzI1MTMzMjMw
+WjAaMRgwFgYDVQQDDA91bmJvdW5kLWNvbnRyb2wwggGiMA0GCSqGSIb3DQEBAQUA
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+A6a+UMdip6SMNv+85bYrFRAsbThpkwnWZZ91vAbQIpCRKMhIQNnWXvq+EzqZMzR/
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++i/XmXa+PgZX4pdHTR0CAwEAATANBgkqhkiG9w0BAQsFAAOCAYEAd++Wen6l8Ifj
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+ZiVOUldqSHD4kKrFO4nJYXZyipRbcXybsLiX9GP0GLemc3IgIvOXyJ2RPp06o/SJ
+pzlMlkcAfLJaSuEW57xRakhuNK7m051TKKzJzIEX+NFYOVdafFHS8VwGrYsdrFvD
+72tMfu+Fu55y3awdWWGc6YlaGogZiuMnJkvQphwgn+5qE/7CGEckoKEsH601rqIZ
+muaIc85+nEcHJeijd/ZlBN9zeltjFoMuqTUENgmv8+tUAdVm/UMY9Vjme6b43ydP
+uv6DS02+k9z8toxXworLiPr94BGaiGV1NxgwZKLZigYJt/Fi2Qte
+-----END CERTIFICATE-----
diff --git a/contrib/unbound/testdata/ip_ratelimit.tdir/unbound_server.key b/contrib/unbound/testdata/ip_ratelimit.tdir/unbound_server.key
new file mode 100644
index 000000000000..370a7bbb2f22
--- /dev/null
+++ b/contrib/unbound/testdata/ip_ratelimit.tdir/unbound_server.key
@@ -0,0 +1,39 @@
+-----BEGIN RSA PRIVATE KEY-----
+MIIG5AIBAAKCAYEAvjSVSN2QMXudpzukdLCqgg/IOhCX8KYkD0FFFfWcQjgKq5wI
+0x41iG32a6wbGanre4IX7VxaSPu9kkHfnGgynCk5nwDRedE/FLFhAU78PoT0+Nqq
+GRS7XVQ24vLmIz9Hqc2Ozx1um1BXBTmIT0UfN2e22I0LWQ6a3seZlEDRj45gnk7Z
+uh9MDgotaBdm+v1JAbupSf6Zis4VEH3JNdvVGE3O1DHEIeuuz/3BDhpf6WBDH+8K
+WaBe1ca4TZHr9ThL2gEMEfAQl0wXDwRWRoi3NjNMH+mw0L1rjwThI5GXqNIee7o5
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+A5UoZgRzXgzECelXSCTBFlMTnT48LfA9pMLydyjAz2UdPHs5Iv+TK5nnI+aJoeaP
+7kFZSngxdy1+A/bNAgMBAAECggGBALpTOIqQwVg4CFBylL/a8K1IWJTI/I65sklf
+XxYL7G7SB2HlEJ//z+E+F0+S4Vlao1vyLQ5QkgE82pAUB8FoMWvY1qF0Y8A5wtm6
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+gh8rgqbyo6hQkBW5Y90Wz824cqaYebZDaBR/xlVx/YwjKkohv8Bde2lpH/ZxRZ1Z
+5Sk2s6GJ/vU0L9RsJZgCgj4L6Coal1NMxuZtCXAlnOpiCdxSZgfqbshbTVz30KsG
+ZJG361Cua1ScdAHxlZBxT52/1Sm0zRC2hnxL7h4qo7Idmtzs40LAJvYOKekR0pPN
+oWeJfra7vgx/jVNvMFWoOoSLpidVO4g+ot4ery6tAoHAdW3rCic1C2zdnmH28Iw+
+s50l8Lk3mz+I5wgJd1zkzCO0DxZIoWPGA3g7cmCYr6N3KRsZMs4W9NAXgjpFGDkW
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+jepvSPHSsxVLFugL79h0eVIS5z4huW48i9xgU8VlHdgAcgEPIAOFcOw2BCu/s0Vp
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+MTTb+4sJjfqleWuvr1XNMeu2mBfXBQkWGZP1byBK0MvD/aQ2PWq92A==
+-----END RSA PRIVATE KEY-----
diff --git a/contrib/unbound/testdata/ip_ratelimit.tdir/unbound_server.pem b/contrib/unbound/testdata/ip_ratelimit.tdir/unbound_server.pem
new file mode 100644
index 000000000000..986807310f2b
--- /dev/null
+++ b/contrib/unbound/testdata/ip_ratelimit.tdir/unbound_server.pem
@@ -0,0 +1,22 @@
+-----BEGIN CERTIFICATE-----
+MIIDqzCCAhMCFBHWXeQ6ZIa9QcQbXLFfC6tj+KA+MA0GCSqGSIb3DQEBCwUAMBIx
+EDAOBgNVBAMMB3VuYm91bmQwHhcNMjAwNzA4MTMzMjI5WhcNNDAwMzI1MTMzMjI5
+WjASMRAwDgYDVQQDDAd1bmJvdW5kMIIBojANBgkqhkiG9w0BAQEFAAOCAY8AMIIB
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++nypHk/DOoC7DIM3ufN0yxPBsFo5TVowxfhdjZXJbbftd2TZv7AH8+XLA5UoZgRz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+-----END CERTIFICATE-----
diff --git a/contrib/unbound/testdata/iter_cname_minimise_nx.rpl b/contrib/unbound/testdata/iter_cname_minimise_nx.rpl
new file mode 100644
index 000000000000..080055208daf
--- /dev/null
+++ b/contrib/unbound/testdata/iter_cname_minimise_nx.rpl
@@ -0,0 +1,246 @@
+; config options
+server:
+	target-fetch-policy: "0 0 0 0 0"
+	qname-minimisation: yes
+	module-config: "validator iterator"
+	trust-anchor: "example.com.    3600    IN      DS      2854 3 1 46e4ffc6e9a4793b488954bd3f0cc6af0dfb201b"
+	val-override-date: "20070916134226"
+	fake-sha1: yes
+	trust-anchor-signaling: no
+
+stub-zone:
+	name: "."
+	stub-addr: 193.0.14.129         # K.ROOT-SERVERS.NET.
+CONFIG_END
+
+SCENARIO_BEGIN Test cname chain resolution of nxdomain with qname minimisation.
+; the qtype CNAME lookup has NXDOMAIN.
+
+; K.ROOT-SERVERS.NET.
+RANGE_BEGIN 0 100
+	ADDRESS 193.0.14.129
+ENTRY_BEGIN
+MATCH opcode qtype qname
+ADJUST copy_id
+REPLY QR NOERROR
+SECTION QUESTION
+. IN NS
+SECTION ANSWER
+. IN NS K.ROOT-SERVERS.NET.
+SECTION ADDITIONAL
+K.ROOT-SERVERS.NET.     IN      A       193.0.14.129
+ENTRY_END
+
+ENTRY_BEGIN
+MATCH opcode subdomain
+ADJUST copy_id copy_query
+REPLY QR NOERROR
+SECTION QUESTION
+com. IN NS
+SECTION AUTHORITY
+com.    IN NS   a.gtld-servers.net.
+SECTION ADDITIONAL
+a.gtld-servers.net.     IN      A       192.5.6.30
+ENTRY_END
+RANGE_END
+
+; a.gtld-servers.net.
+RANGE_BEGIN 0 100
+	ADDRESS 192.5.6.30
+ENTRY_BEGIN
+MATCH opcode qtype qname
+ADJUST copy_id
+REPLY QR NOERROR
+SECTION QUESTION
+com. IN NS
+SECTION ANSWER
+com.    IN NS   a.gtld-servers.net.
+SECTION ADDITIONAL
+a.gtld-servers.net.     IN      A       192.5.6.30
+ENTRY_END
+
+ENTRY_BEGIN
+MATCH opcode subdomain
+ADJUST copy_id copy_query
+REPLY QR NOERROR
+SECTION QUESTION
+example.com. IN NS
+SECTION AUTHORITY
+example.com.    IN NS   ns.example.com.
+SECTION ADDITIONAL
+ns.example.com. IN A 1.2.3.44
+ENTRY_END
+RANGE_END
+
+; ns.example.com.
+RANGE_BEGIN 0 100
+	ADDRESS 1.2.3.44
+ENTRY_BEGIN
+MATCH opcode qtype qname
+ADJUST copy_id
+REPLY QR NOERROR
+SECTION QUESTION
+example.com. IN NS
+SECTION ANSWER
+example.com.    IN NS   ns.example.com.
+example.com.    3600    IN      RRSIG   NS 3 2 3600 20070926134150 20070829134150 2854 example.com. MC0CFQCN+qHdJxoI/2tNKwsb08pra/G7aAIUAWA5sDdJTbrXA1/3OaesGBAO3sI= ;{id = 2854}
+SECTION ADDITIONAL
+ns.example.com.         IN      A       1.2.3.44
+ns.example.com.	3600	IN	RRSIG	A 3 3 3600 20070926134150 20070829134150 2854 example.com. AAZrcta3WCyz0iq2p78gmcPpXbmXPP9nQXM/czH1R9ilCaEoV8E27UU=
+ENTRY_END
+
+ENTRY_BEGIN
+MATCH opcode qtype qname
+ADJUST copy_id
+REPLY QR NOERROR
+SECTION QUESTION
+ns.example.com. IN A
+SECTION ANSWER
+ns.example.com. IN A    1.2.3.44
+ns.example.com.	3600	IN	RRSIG	A 3 3 3600 20070926134150 20070829134150 2854 example.com. AAZrcta3WCyz0iq2p78gmcPpXbmXPP9nQXM/czH1R9ilCaEoV8E27UU=
+SECTION AUTHORITY
+example.com.    IN NS   ns.example.com.
+example.com.    3600    IN      RRSIG   NS 3 2 3600 20070926134150 20070829134150 2854 example.com. MC0CFQCN+qHdJxoI/2tNKwsb08pra/G7aAIUAWA5sDdJTbrXA1/3OaesGBAO3sI= ;{id = 2854}
+ENTRY_END
+
+; response to DNSKEY priming query
+ENTRY_BEGIN
+MATCH opcode qtype qname
+ADJUST copy_id
+REPLY QR NOERROR
+SECTION QUESTION
+example.com. IN DNSKEY
+SECTION ANSWER
+example.com.    3600    IN      DNSKEY  256 3 3 ALXLUsWqUrY3JYER3T4TBJII s70j+sDS/UT2QRp61SE7S3E EXopNXoFE73JLRmvpi/UrOO/Vz4Se 6wXv/CYCKjGw06U4WRgR YXcpEhJROyNapmdIKSx hOzfLVE1gqA0PweZR8d tY3aNQSRn3sPpwJr6Mi /PqQKAMMrZ9ckJpf1+b QMOOvxgzz2U1GS18b3y ZKcgTMEaJzd/GZYzi/B N2DzQ0MsrSwYXfsNLFO Bbs8PJMW4LYIxeeOe6rUgkWOF 7CC9Dh/dduQ1QrsJhmZAEFfd6ByYV+ ;{id = 2854 (zsk), size = 1688b}
+example.com.    3600    IN      RRSIG   DNSKEY 3 2 3600 20070926134802 20070829134802 2854 example.com. MCwCFG1yhRNtTEa3Eno2zhVVuy2EJX3wAhQeLyUp6+UXcpC5qGNu9tkrTEgPUg== ;{id = 2854}
+SECTION AUTHORITY
+example.com.    IN NS   ns.example.com.
+example.com.    3600    IN      RRSIG   NS 3 2 3600 20070926134150 20070829134150 2854 example.com. MC0CFQCN+qHdJxoI/2tNKwsb08pra/G7aAIUAWA5sDdJTbrXA1/3OaesGBAO3sI= ;{id = 2854}
+SECTION ADDITIONAL
+ns.example.com.         IN      A       1.2.3.44
+ns.example.com.	3600	IN	RRSIG	A 3 3 3600 20070926134150 20070829134150 2854 example.com. AAZrcta3WCyz0iq2p78gmcPpXbmXPP9nQXM/czH1R9ilCaEoV8E27UU=
+ENTRY_END
+
+ENTRY_BEGIN
+MATCH opcode qtype qname
+ADJUST copy_id
+REPLY QR NOERROR
+SECTION QUESTION
+ns.example.com. IN AAAA
+SECTION AUTHORITY
+example.com.    IN NS   ns.example.com.
+example.com.    3600    IN      RRSIG   NS 3 2 3600 20070926134150 20070829134150 2854 example.com. MC0CFQCN+qHdJxoI/2tNKwsb08pra/G7aAIUAWA5sDdJTbrXA1/3OaesGBAO3sI= ;{id = 2854}
+SECTION ADDITIONAL
+ns.example.com. IN A   1.2.3.44
+ns.example.com.	3600	IN	RRSIG	A 3 3 3600 20070926134150 20070829134150 2854 example.com. AAZrcta3WCyz0iq2p78gmcPpXbmXPP9nQXM/czH1R9ilCaEoV8E27UU=
+ENTRY_END
+
+ENTRY_BEGIN
+MATCH opcode qtype qname
+ADJUST copy_id
+REPLY QR AA NXDOMAIN
+SECTION QUESTION
+www.example.com. IN A
+SECTION ANSWER
+SECTION AUTHORITY
+example.com. 300 IN SOA a. b. 1 2 3 4 300
+example.com.	300	IN	RRSIG	SOA 3 2 300 20070926134150 20070829134150 2854 example.com. AFPx1ZhcHixnxfB90ha4zgp7A+EdM8L63tUnVdlI5B14NiRIXONPDB4=
+v.example.com. IN NSEC x.example.com. A AAAA RRSIG NSEC
+v.example.com.	3600	IN	RRSIG	NSEC 3 3 3600 20070926134150 20070829134150 2854 example.com. AFT0Ao01lUN8Ppa9QPayQIN9ZtNIj4TzyhUQV31+FhNRK5uSQhiVwMc=
+example.com.	3600	IN	NSEC	abc.example.com. NS SOA RRSIG NSEC DNSKEY
+example.com.	3600	IN	RRSIG	NSEC 3 2 3600 20070926134150 20070829134150 2854 example.com. ABEOu6iietfjKY1MS0TutZZxUtRYA6XKsC1rMTrenwBF2darY3/Emco=
+ENTRY_END
+
+ENTRY_BEGIN
+MATCH opcode qtype qname
+ADJUST copy_id
+REPLY QR AA NXDOMAIN
+SECTION QUESTION
+c.example.com. IN A
+SECTION ANSWER
+c.example.com. 10 IN CNAME www.example.com.
+c.example.com.	10	IN	RRSIG	CNAME 3 3 10 20070926134150 20070829134150 2854 example.com. ABT7twnK5qkCBKnaOHxFthUOK+3rBge1wEMItoFPdf16OoVdfccYU2U=
+SECTION AUTHORITY
+example.com. 300 IN SOA a. b. 1 2 3 4 300
+example.com.	300	IN	RRSIG	SOA 3 2 300 20070926134150 20070829134150 2854 example.com. AFPx1ZhcHixnxfB90ha4zgp7A+EdM8L63tUnVdlI5B14NiRIXONPDB4=
+v.example.com. IN NSEC x.example.com. A AAAA RRSIG NSEC
+v.example.com.	3600	IN	RRSIG	NSEC 3 3 3600 20070926134150 20070829134150 2854 example.com. AFT0Ao01lUN8Ppa9QPayQIN9ZtNIj4TzyhUQV31+FhNRK5uSQhiVwMc=
+example.com.	3600	IN	NSEC	abc.example.com. NS SOA RRSIG NSEC DNSKEY
+example.com.	3600	IN	RRSIG	NSEC 3 2 3600 20070926134150 20070829134150 2854 example.com. ABEOu6iietfjKY1MS0TutZZxUtRYA6XKsC1rMTrenwBF2darY3/Emco=
+ENTRY_END
+
+ENTRY_BEGIN
+MATCH opcode qtype qname
+ADJUST copy_id
+REPLY QR NOERROR
+SECTION QUESTION
+c.example.com. IN CNAME
+SECTION ANSWER
+c.example.com. 10 IN CNAME www.example.com.
+c.example.com.	10	IN	RRSIG	CNAME 3 3 10 20070926134150 20070829134150 2854 example.com. ABT7twnK5qkCBKnaOHxFthUOK+3rBge1wEMItoFPdf16OoVdfccYU2U=
+ENTRY_END
+RANGE_END
+
+STEP 1 QUERY
+ENTRY_BEGIN
+REPLY RD DO
+SECTION QUESTION
+c.example.com. IN CNAME
+ENTRY_END
+
+STEP 20 CHECK_ANSWER
+ENTRY_BEGIN
+MATCH all
+REPLY QR RD RA AD DO NOERROR
+SECTION QUESTION
+c.example.com. IN CNAME
+SECTION ANSWER
+c.example.com. 10 IN CNAME www.example.com.
+c.example.com.	10	IN	RRSIG	CNAME 3 3 10 20070926134150 20070829134150 2854 example.com. ABT7twnK5qkCBKnaOHxFthUOK+3rBge1wEMItoFPdf16OoVdfccYU2U=
+ENTRY_END
+
+STEP 30 QUERY
+ENTRY_BEGIN
+REPLY RD DO
+SECTION QUESTION
+c.example.com. IN CNAME
+ENTRY_END
+
+STEP 40 CHECK_ANSWER
+ENTRY_BEGIN
+MATCH all
+REPLY QR RD RA AD DO NOERROR
+SECTION QUESTION
+c.example.com. IN CNAME
+SECTION ANSWER
+c.example.com. 10 IN CNAME www.example.com.
+c.example.com.	10	IN	RRSIG	CNAME 3 3 10 20070926134150 20070829134150 2854 example.com. ABT7twnK5qkCBKnaOHxFthUOK+3rBge1wEMItoFPdf16OoVdfccYU2U=
+ENTRY_END
+
+STEP 50 QUERY
+ENTRY_BEGIN
+REPLY RD DO
+SECTION QUESTION
+c.example.com. IN A
+ENTRY_END
+
+STEP 60 CHECK_ANSWER
+ENTRY_BEGIN
+MATCH all
+REPLY QR RD RA AD DO NXDOMAIN
+SECTION QUESTION
+c.example.com. IN A
+SECTION ANSWER
+c.example.com. 10 IN CNAME www.example.com.
+c.example.com.	10	IN	RRSIG	CNAME 3 3 10 20070926134150 20070829134150 2854 example.com. ABT7twnK5qkCBKnaOHxFthUOK+3rBge1wEMItoFPdf16OoVdfccYU2U=
+SECTION AUTHORITY
+example.com. 300 IN SOA a. b. 1 2 3 4 300
+example.com.	300	IN	RRSIG	SOA 3 2 300 20070926134150 20070829134150 2854 example.com. AFPx1ZhcHixnxfB90ha4zgp7A+EdM8L63tUnVdlI5B14NiRIXONPDB4=
+v.example.com. IN NSEC x.example.com. A AAAA RRSIG NSEC
+v.example.com.	3600	IN	RRSIG	NSEC 3 3 3600 20070926134150 20070829134150 2854 example.com. AFT0Ao01lUN8Ppa9QPayQIN9ZtNIj4TzyhUQV31+FhNRK5uSQhiVwMc=
+example.com.	3600	IN	NSEC	abc.example.com. NS SOA RRSIG NSEC DNSKEY
+example.com.	3600	IN	RRSIG	NSEC 3 2 3600 20070926134150 20070829134150 2854 example.com. ABEOu6iietfjKY1MS0TutZZxUtRYA6XKsC1rMTrenwBF2darY3/Emco=
+ENTRY_END
+ENTRY_END
+
+SCENARIO_END
diff --git a/contrib/unbound/testdata/iter_failreply.rpl b/contrib/unbound/testdata/iter_failreply.rpl
new file mode 100644
index 000000000000..393714196d89
--- /dev/null
+++ b/contrib/unbound/testdata/iter_failreply.rpl
@@ -0,0 +1,132 @@
+; config options
+server:
+	target-fetch-policy: "0 0 0 0 0"
+	qname-minimisation: "no"
+	minimal-responses: no
+	log-servfail: yes
+
+stub-zone:
+	name: "."
+	stub-addr: 193.0.14.129 	# K.ROOT-SERVERS.NET.
+CONFIG_END
+
+SCENARIO_BEGIN Test iterator fail_reply report
+
+; K.ROOT-SERVERS.NET.
+RANGE_BEGIN 0 100
+	ADDRESS 193.0.14.129 
+ENTRY_BEGIN
+MATCH opcode qtype qname
+ADJUST copy_id
+REPLY QR NOERROR
+SECTION QUESTION
+. IN NS
+SECTION ANSWER
+. IN NS	K.ROOT-SERVERS.NET.
+SECTION ADDITIONAL
+K.ROOT-SERVERS.NET.	IN	A	193.0.14.129
+ENTRY_END
+
+ENTRY_BEGIN
+MATCH opcode subdomain
+ADJUST copy_id copy_query
+REPLY QR NOERROR
+SECTION QUESTION
+example.com. IN NS
+SECTION AUTHORITY
+example.com.	IN NS	ns.example.com.
+example.com.	IN NS	ns2.example.net.
+SECTION ADDITIONAL
+ns.example.com. IN A 1.2.3.4
+ns.example.com. IN AAAA ::1
+ns2.example.net. IN AAAA ::1
+ENTRY_END
+
+ENTRY_BEGIN
+MATCH opcode qtype qname
+ADJUST copy_id
+REPLY QR AA NOERROR
+SECTION QUESTION
+ns2.example.net. IN A
+SECTION ANSWER
+ns2.example.net. IN A 1.2.3.5
+ENTRY_END
+
+ENTRY_BEGIN
+MATCH opcode qtype qname
+ADJUST copy_id
+REPLY QR AA NOERROR
+SECTION QUESTION
+ns2.example.net. IN AAAA
+SECTION ANSWER
+ns2.example.net. IN AAAA ::1
+ENTRY_END
+
+RANGE_END
+
+RANGE_END
+
+; ns.example.com.
+RANGE_BEGIN 0 100
+	ADDRESS 1.2.3.4
+ENTRY_BEGIN
+MATCH opcode qtype qname
+ADJUST copy_id
+REPLY QR SERVFAIL
+SECTION QUESTION
+www.example.com. IN A
+ENTRY_END
+
+ENTRY_BEGIN
+MATCH opcode qtype qname
+ADJUST copy_id
+REPLY QR SERVFAIL
+SECTION QUESTION
+ns.example.com. IN A
+ENTRY_END
+
+ENTRY_BEGIN
+MATCH opcode qtype qname
+ADJUST copy_id
+REPLY QR SERVFAIL
+SECTION QUESTION
+ns.example.com. IN AAAA
+ENTRY_END
+RANGE_END
+
+STEP 1 QUERY
+ENTRY_BEGIN
+REPLY RD
+SECTION QUESTION
+www.example.com. IN A
+ENTRY_END
+
+STEP 20 CHECK_OUT_QUERY
+ENTRY_BEGIN
+REPLY RD
+SECTION QUESTION
+www.example.com. IN A
+ENTRY_END
+
+STEP 21 TIMEOUT
+STEP 22 TIMEOUT
+STEP 23 TIMEOUT
+STEP 24 TIMEOUT
+STEP 25 TIMEOUT
+
+STEP 31 TIMEOUT
+STEP 32 TIMEOUT
+STEP 33 TIMEOUT
+STEP 34 TIMEOUT
+
+; recursion happens here.
+STEP 50 CHECK_ANSWER
+ENTRY_BEGIN
+MATCH all
+REPLY QR RD RA SERVFAIL
+SECTION QUESTION
+www.example.com. IN A
+SECTION ANSWER
+ENTRY_END
+
+SCENARIO_END
diff --git a/contrib/unbound/testdata/iter_ignore_empty.rpl b/contrib/unbound/testdata/iter_ignore_empty.rpl
new file mode 100644
index 000000000000..c70dd7e8df7b
--- /dev/null
+++ b/contrib/unbound/testdata/iter_ignore_empty.rpl
@@ -0,0 +1,198 @@
+; config options
+server:
+	target-fetch-policy: "0 0 0 0 0"
+	qname-minimisation: "no"
+	minimal-responses: no
+
+stub-zone:
+	name: "."
+	stub-addr: 193.0.14.129 	# K.ROOT-SERVERS.NET.
+CONFIG_END
+
+SCENARIO_BEGIN Test ignore of an empty response.
+
+; K.ROOT-SERVERS.NET.
+RANGE_BEGIN 0 100
+	ADDRESS 193.0.14.129 
+ENTRY_BEGIN
+MATCH opcode qtype qname
+ADJUST copy_id
+REPLY QR NOERROR
+SECTION QUESTION
+. IN NS
+SECTION ANSWER
+. IN NS	K.ROOT-SERVERS.NET.
+SECTION ADDITIONAL
+K.ROOT-SERVERS.NET.	IN	A	193.0.14.129
+ENTRY_END
+
+ENTRY_BEGIN
+MATCH opcode subdomain
+ADJUST copy_id copy_query
+REPLY QR NOERROR
+SECTION QUESTION
+com. IN NS
+SECTION AUTHORITY
+com.	IN NS	a.gtld-servers.net.
+SECTION ADDITIONAL
+a.gtld-servers.net.	IN 	A	192.5.6.30
+ENTRY_END
+RANGE_END
+
+; a.gtld-servers.net.
+RANGE_BEGIN 0 100
+	ADDRESS 192.5.6.30
+ENTRY_BEGIN
+MATCH opcode qtype qname
+ADJUST copy_id
+REPLY QR NOERROR
+SECTION QUESTION
+com. IN NS
+SECTION ANSWER
+com.	IN NS	a.gtld-servers.net.
+SECTION ADDITIONAL
+a.gtld-servers.net.	IN 	A	192.5.6.30
+ENTRY_END
+
+ENTRY_BEGIN
+MATCH opcode subdomain
+ADJUST copy_id copy_query
+REPLY QR NOERROR
+SECTION QUESTION
+example.com. IN NS
+SECTION AUTHORITY
+example.com.	IN NS	ns.example.com.
+example.com.	IN NS	ns2.example2.com.
+SECTION ADDITIONAL
+ns.example.com.		IN 	A	1.2.3.4
+ENTRY_END
+
+ENTRY_BEGIN
+MATCH opcode subdomain
+ADJUST copy_id copy_query
+REPLY QR NOERROR
+SECTION QUESTION
+example2.com. IN NS
+SECTION AUTHORITY
+example2.com.	IN NS	ns2.example2.com.
+SECTION ADDITIONAL
+ns2.example2.com.		IN 	A	1.2.3.5
+ENTRY_END
+RANGE_END
+
+; ns.example.com.
+RANGE_BEGIN 0 100
+	ADDRESS 1.2.3.4
+ENTRY_BEGIN
+MATCH opcode qtype qname
+ADJUST copy_id
+REPLY QR AA NOERROR
+SECTION QUESTION
+example.com. IN NS
+SECTION ANSWER
+example.com.	IN NS	ns.example.com.
+example.com.	IN NS	ns2.example.net.
+SECTION ADDITIONAL
+ns.example.com.		IN 	A	1.2.3.4
+ENTRY_END
+
+ENTRY_BEGIN
+MATCH opcode qtype qname
+ADJUST copy_id
+REPLY QR AA NOERROR
+SECTION QUESTION
+ns.example.com. IN A
+SECTION ANSWER
+ns.example.com.		IN 	A	1.2.3.4
+ENTRY_END
+
+ENTRY_BEGIN
+MATCH opcode qtype qname
+ADJUST copy_id
+REPLY QR AA NOERROR
+SECTION QUESTION
+ns.example.com. IN AAAA
+SECTION AUTHORITY
+example.com.	IN SOA ns root 4 14400 3600 604800 3600
+ENTRY_END
+
+ENTRY_BEGIN
+MATCH opcode qtype qname
+ADJUST copy_id
+REPLY QR AA NOERROR
+SECTION QUESTION
+www.example.com. IN A
+SECTION ANSWER
+SECTION AUTHORITY
+SECTION ADDITIONAL
+ENTRY_END
+RANGE_END
+
+; ns2.example2.com.
+RANGE_BEGIN 0 100
+	ADDRESS 1.2.3.5
+ENTRY_BEGIN
+MATCH opcode qtype qname
+ADJUST copy_id
+REPLY QR AA NOERROR
+SECTION QUESTION
+example2.com. IN NS
+SECTION ANSWER
+example2.com.	IN NS	ns2.example2.com.
+SECTION ADDITIONAL
+ns2.example2.com.		IN 	A	1.2.3.5
+ENTRY_END
+
+ENTRY_BEGIN
+MATCH opcode qtype qname
+ADJUST copy_id
+REPLY QR AA NOERROR
+SECTION QUESTION
+ns2.example2.com. IN A
+SECTION ANSWER
+ns2.example2.com.		IN 	A	1.2.3.5
+ENTRY_END
+
+ENTRY_BEGIN
+MATCH opcode qtype qname
+ADJUST copy_id
+REPLY QR AA NOERROR
+SECTION QUESTION
+ns2.example2.com. IN AAAA
+SECTION AUTHORITY
+example2.com.	IN SOA ns2 root 4 14400 3600 604800 3600
+ENTRY_END
+
+ENTRY_BEGIN
+MATCH opcode qtype qname
+ADJUST copy_id
+REPLY QR AA NOERROR
+SECTION QUESTION
+www.example.com. IN A
+SECTION ANSWER
+www.example.com. IN A	10.20.30.40
+ENTRY_END
+RANGE_END
+
+STEP 1 QUERY
+ENTRY_BEGIN
+REPLY RD
+SECTION QUESTION
+www.example.com. IN A
+ENTRY_END
+
+; recursion happens here.
+STEP 10 CHECK_ANSWER
+ENTRY_BEGIN
+MATCH all
+REPLY QR RD RA NOERROR
+SECTION QUESTION
+www.example.com. IN A
+SECTION ANSWER
+www.example.com. IN A	10.20.30.40
+ENTRY_END
+
+; wait for pending nameserver lookups.
+STEP 20 TRAFFIC
+
+SCENARIO_END
diff --git a/contrib/unbound/testdata/iter_nat64.rpl b/contrib/unbound/testdata/iter_nat64.rpl
new file mode 100644
index 000000000000..dde0a25596c1
--- /dev/null
+++ b/contrib/unbound/testdata/iter_nat64.rpl
@@ -0,0 +1,117 @@
+; config options
+server:
+	do-nat64: yes
+	target-fetch-policy: "0 0 0 0 0"
+
+stub-zone:
+	name: "."
+	stub-addr: 2001:db8::1
+CONFIG_END
+
+SCENARIO_BEGIN Test NAT64 transport for a v4-only server.
+
+RANGE_BEGIN 0 100
+	ADDRESS 2001:db8::1
+ENTRY_BEGIN
+MATCH opcode qtype qname
+ADJUST copy_id
+REPLY QR NOERROR
+SECTION QUESTION
+. IN NS
+SECTION ANSWER
+. IN NS	FAKE.ROOT.
+SECTION ADDITIONAL
+FAKE.ROOT.	IN	AAAA	2001:db8::1
+ENTRY_END
+
+ENTRY_BEGIN
+MATCH opcode subdomain
+ADJUST copy_id copy_query
+REPLY QR NOERROR
+SECTION QUESTION
+v4only. IN NS
+SECTION AUTHORITY
+v4only.	IN NS	ns.v4only.
+SECTION ADDITIONAL
+ns.v4only.	IN	A	192.0.2.1
+ENTRY_END
+
+RANGE_END
+
+; replies from NS over "NAT64"
+
+RANGE_BEGIN 0 100
+	ADDRESS 64:ff9b::c000:0201
+
+; A over NAT64
+ENTRY_BEGIN
+MATCH opcode qtype qname
+ADJUST copy_id
+REPLY AA QR NOERROR
+SECTION QUESTION
+ns.v4only. IN A
+SECTION ANSWER
+ns.v4only.	IN	A	192.0.2.1
+SECTION AUTHORITY
+v4only.		IN	NS	ns.v4only.
+ENTRY_END
+
+; no AAAA
+ENTRY_BEGIN
+MATCH opcode qtype qname
+ADJUST copy_id
+REPLY AA QR NOERROR
+SECTION QUESTION
+ns.v4only.	IN	AAAA
+SECTION AUTHORITY
+v4only.		IN	NS	ns.v4only.
+SECTION ADDITIONAL
+ns.v4only.	IN	A	192.0.2.1
+ENTRY_END
+
+ENTRY_BEGIN
+MATCH opcode qtype qname
+ADJUST copy_id
+REPLY AA QR NOERROR
+SECTION QUESTION
+v4only.		IN	NS
+SECTION ANSWER
+v4only.		IN	NS	ns.v4only.
+SECTION ADDITIONAL
+ns.v4only.	IN	A	192.0.2.1
+ENTRY_END
+
+ENTRY_BEGIN
+MATCH opcode qtype qname
+ADJUST copy_id
+REPLY AA QR NOERROR
+SECTION QUESTION
+test.v4only.	IN	A
+SECTION ANSWER
+test.v4only.	IN	A	192.0.2.2
+SECTION AUTHORITY
+v4only.		IN	NS	ns.v4only.
+SECTION ADDITIONAL
+ns.v4only.	IN	A	192.0.2.1
+ENTRY_END
+
+RANGE_END
+
+STEP 1 QUERY
+ENTRY_BEGIN
+REPLY RD
+SECTION QUESTION
+test.v4only. IN A
+ENTRY_END
+
+STEP 20 CHECK_ANSWER
+ENTRY_BEGIN
+MATCH all
+REPLY QR RD RA NOERROR
+SECTION QUESTION
+test.v4only.	IN	A
+SECTION ANSWER
+test.v4only.	IN	A	192.0.2.2
+ENTRY_END
+
+SCENARIO_END
diff --git a/contrib/unbound/testdata/iter_nat64_prefix.rpl b/contrib/unbound/testdata/iter_nat64_prefix.rpl
new file mode 100644
index 000000000000..ecb6508dcf55
--- /dev/null
+++ b/contrib/unbound/testdata/iter_nat64_prefix.rpl
@@ -0,0 +1,119 @@
+; config options
+server:
+	do-nat64: yes
+	nat64-prefix: 2001:db8:1234::/96
+	target-fetch-policy: "0 0 0 0 0"
+	do-ip4: no
+
+stub-zone:
+	name: "."
+	stub-addr: 2001:db8::1
+CONFIG_END
+
+SCENARIO_BEGIN Test NAT64 transport for a v4-only server, custom NAT64 prefix.
+
+RANGE_BEGIN 0 100
+	ADDRESS 2001:db8::1
+ENTRY_BEGIN
+MATCH opcode qtype qname
+ADJUST copy_id
+REPLY QR NOERROR
+SECTION QUESTION
+. IN NS
+SECTION ANSWER
+. IN NS	FAKE.ROOT.
+SECTION ADDITIONAL
+FAKE.ROOT.	IN	AAAA	2001:db8::1
+ENTRY_END
+
+ENTRY_BEGIN
+MATCH opcode subdomain
+ADJUST copy_id copy_query
+REPLY QR NOERROR
+SECTION QUESTION
+v4only. IN NS
+SECTION AUTHORITY
+v4only.	IN NS	ns.v4only.
+SECTION ADDITIONAL
+ns.v4only.	IN	A	192.0.2.1
+ENTRY_END
+
+RANGE_END
+
+; replies from NS over "NAT64"
+
+RANGE_BEGIN 0 100
+	ADDRESS 2001:db8:1234::c000:0201
+
+; A over NAT64
+ENTRY_BEGIN
+MATCH opcode qtype qname
+ADJUST copy_id
+REPLY AA QR NOERROR
+SECTION QUESTION
+ns.v4only. IN A
+SECTION ANSWER
+ns.v4only.	IN	A	192.0.2.1
+SECTION AUTHORITY
+v4only.		IN	NS	ns.v4only.
+ENTRY_END
+
+; no AAAA
+ENTRY_BEGIN
+MATCH opcode qtype qname
+ADJUST copy_id
+REPLY AA QR NOERROR
+SECTION QUESTION
+ns.v4only.	IN	AAAA
+SECTION AUTHORITY
+v4only.		IN	NS	ns.v4only.
+SECTION ADDITIONAL
+ns.v4only.	IN	A	192.0.2.1
+ENTRY_END
+
+ENTRY_BEGIN
+MATCH opcode qtype qname
+ADJUST copy_id
+REPLY AA QR NOERROR
+SECTION QUESTION
+v4only.		IN	NS
+SECTION ANSWER
+v4only.		IN	NS	ns.v4only.
+SECTION ADDITIONAL
+ns.v4only.	IN	A	192.0.2.1
+ENTRY_END
+
+ENTRY_BEGIN
+MATCH opcode qtype qname
+ADJUST copy_id
+REPLY AA QR NOERROR
+SECTION QUESTION
+test.v4only.	IN	A
+SECTION ANSWER
+test.v4only.	IN	A	192.0.2.2
+SECTION AUTHORITY
+v4only.		IN	NS	ns.v4only.
+SECTION ADDITIONAL
+ns.v4only.	IN	A	192.0.2.1
+ENTRY_END
+
+RANGE_END
+
+STEP 1 QUERY
+ENTRY_BEGIN
+REPLY RD
+SECTION QUESTION
+test.v4only. IN A
+ENTRY_END
+
+STEP 20 CHECK_ANSWER
+ENTRY_BEGIN
+MATCH all
+REPLY QR RD RA NOERROR
+SECTION QUESTION
+test.v4only.	IN	A
+SECTION ANSWER
+test.v4only.	IN	A	192.0.2.2
+ENTRY_END
+
+SCENARIO_END
diff --git a/contrib/unbound/testdata/iter_nat64_prefix48.rpl b/contrib/unbound/testdata/iter_nat64_prefix48.rpl
new file mode 100644
index 000000000000..e7c32e8ffc6a
--- /dev/null
+++ b/contrib/unbound/testdata/iter_nat64_prefix48.rpl
@@ -0,0 +1,118 @@
+; config options
+server:
+	do-nat64: yes
+	nat64-prefix: 2001:db8:2345::/48
+	target-fetch-policy: "0 0 0 0 0"
+
+stub-zone:
+	name: "."
+	stub-addr: 2001:db8::1
+CONFIG_END
+
+SCENARIO_BEGIN Test NAT64 transport, this time with /48 NAT64 prefix.
+
+RANGE_BEGIN 0 100
+	ADDRESS 2001:db8::1
+ENTRY_BEGIN
+MATCH opcode qtype qname
+ADJUST copy_id
+REPLY QR NOERROR
+SECTION QUESTION
+. IN NS
+SECTION ANSWER
+. IN NS	FAKE.ROOT.
+SECTION ADDITIONAL
+FAKE.ROOT.	IN	AAAA	2001:db8::1
+ENTRY_END
+
+ENTRY_BEGIN
+MATCH opcode subdomain
+ADJUST copy_id copy_query
+REPLY QR NOERROR
+SECTION QUESTION
+v4only. IN NS
+SECTION AUTHORITY
+v4only.	IN NS	ns.v4only.
+SECTION ADDITIONAL
+ns.v4only.	IN	A	192.0.2.1
+ENTRY_END
+
+RANGE_END
+
+; replies from NS over "NAT64"
+
+RANGE_BEGIN 0 100
+	ADDRESS 2001:db8:2345:c000:0002:0100::
+
+; A over NAT64
+ENTRY_BEGIN
+MATCH opcode qtype qname
+ADJUST copy_id
+REPLY AA QR NOERROR
+SECTION QUESTION
+ns.v4only. IN A
+SECTION ANSWER
+ns.v4only.	IN	A	192.0.2.1
+SECTION AUTHORITY
+v4only.		IN	NS	ns.v4only.
+ENTRY_END
+
+; no AAAA
+ENTRY_BEGIN
+MATCH opcode qtype qname
+ADJUST copy_id
+REPLY AA QR NOERROR
+SECTION QUESTION
+ns.v4only.	IN	AAAA
+SECTION AUTHORITY
+v4only.		IN	NS	ns.v4only.
+SECTION ADDITIONAL
+ns.v4only.	IN	A	192.0.2.1
+ENTRY_END
+
+ENTRY_BEGIN
+MATCH opcode qtype qname
+ADJUST copy_id
+REPLY AA QR NOERROR
+SECTION QUESTION
+v4only.		IN	NS
+SECTION ANSWER
+v4only.		IN	NS	ns.v4only.
+SECTION ADDITIONAL
+ns.v4only.	IN	A	192.0.2.1
+ENTRY_END
+
+ENTRY_BEGIN
+MATCH opcode qtype qname
+ADJUST copy_id
+REPLY AA QR NOERROR
+SECTION QUESTION
+test.v4only.	IN	A
+SECTION ANSWER
+test.v4only.	IN	A	192.0.2.2
+SECTION AUTHORITY
+v4only.		IN	NS	ns.v4only.
+SECTION ADDITIONAL
+ns.v4only.	IN	A	192.0.2.1
+ENTRY_END
+
+RANGE_END
+
+STEP 1 QUERY
+ENTRY_BEGIN
+REPLY RD
+SECTION QUESTION
+test.v4only. IN A
+ENTRY_END
+
+STEP 20 CHECK_ANSWER
+ENTRY_BEGIN
+MATCH all
+REPLY QR RD RA NOERROR
+SECTION QUESTION
+test.v4only.	IN	A
+SECTION ANSWER
+test.v4only.	IN	A	192.0.2.2
+ENTRY_END
+
+SCENARIO_END
diff --git a/contrib/unbound/testdata/serve_expired_0ttl_nodata.rpl b/contrib/unbound/testdata/serve_expired_0ttl_nodata.rpl
new file mode 100644
index 000000000000..45b51444bccd
--- /dev/null
+++ b/contrib/unbound/testdata/serve_expired_0ttl_nodata.rpl
@@ -0,0 +1,154 @@
+; config options
+server:
+	module-config: "validator iterator"
+	qname-minimisation: "no"
+	minimal-responses: no
+	serve-expired: yes
+	log-servfail: yes
+	ede: yes
+	ede-serve-expired: yes
+
+
+stub-zone:
+	name: "example.com"
+	stub-addr: 1.2.3.4
+CONFIG_END
+
+SCENARIO_BEGIN Test serve-expired with NXDOMAIN followed by 0 TTL
+; Scenario overview:
+; - query for 0ttl.example.com. IN A
+; - answer from upstream is NODATA; will be cached for the SOA negative TTL.
+; - check that the client gets the NODATA; also cached
+; - query again right after the TTL expired
+; - this time the server answers with a 0 TTL RRset
+; - check that we get the correct answer
+
+; ns.example.com.
+RANGE_BEGIN 0 20
+	ADDRESS 1.2.3.4
+	; response to A query
+	ENTRY_BEGIN
+		MATCH opcode qtype qname
+		ADJUST copy_id
+		REPLY QR AA NOERROR
+		SECTION QUESTION
+			0ttl.example.com. IN A
+		SECTION AUTHORITY
+			example.com IN SOA ns.example.com dns.example.com 1 7200 3600 2419200 10
+	ENTRY_END
+RANGE_END
+
+; ns.example.com.
+RANGE_BEGIN 30 100
+	ADDRESS 1.2.3.4
+	ENTRY_BEGIN
+		MATCH opcode qtype qname
+		ADJUST copy_id
+		REPLY QR NOERROR
+		SECTION QUESTION
+			example.com. 10 IN NS
+		SECTION ANSWER
+			example.com. 10 IN NS ns.example.com.
+		SECTION ADDITIONAL
+			ns.example.com. 10 IN A 1.2.3.4
+	ENTRY_END
+
+	ENTRY_BEGIN
+		MATCH opcode qtype qname
+		ADJUST copy_id
+		REPLY QR NOERROR
+		SECTION QUESTION
+			0ttl.example.com. IN A
+		SECTION ANSWER
+			0ttl.example.com. 0 IN A 5.6.7.8
+		SECTION AUTHORITY
+			example.com. 10 IN NS ns.example.com.
+		SECTION ADDITIONAL
+			ns.example.com. 10 IN A 1.2.3.4
+	ENTRY_END
+RANGE_END
+
+; Query with RD flag
+STEP 0 QUERY
+ENTRY_BEGIN
+	REPLY RD
+	SECTION QUESTION
+		0ttl.example.com. IN A
+ENTRY_END
+
+; Check that we get the NODATA (will be cached)
+STEP 10 CHECK_ANSWER
+ENTRY_BEGIN
+	MATCH all
+	REPLY QR RD RA NOERROR
+	SECTION QUESTION
+		0ttl.example.com. IN A
+	SECTION AUTHORITY
+		example.com IN SOA ns.example.com dns.example.com 1 7200 3600 2419200 10
+ENTRY_END
+
+; Query again
+STEP 20 QUERY
+ENTRY_BEGIN
+	REPLY RD
+	SECTION QUESTION
+		0ttl.example.com. IN A
+ENTRY_END
+
+; Check that we get the cached NODATA
+STEP 30 CHECK_ANSWER
+ENTRY_BEGIN
+	MATCH all
+	REPLY QR RD RA NOERROR
+	SECTION QUESTION
+		0ttl.example.com. IN A
+	SECTION AUTHORITY
+		example.com IN SOA ns.example.com dns.example.com 1 7200 3600 2419200 10
+ENTRY_END
+
+; Wait for the NXDOMAIN to expire
+STEP 31 TIME_PASSES ELAPSE 32
+
+; Query again
+STEP 40 QUERY
+ENTRY_BEGIN
+	REPLY RD
+	SECTION QUESTION
+		0ttl.example.com. IN A
+ENTRY_END
+
+; Check that we get the cached NODATA
+STEP 50 CHECK_ANSWER
+ENTRY_BEGIN
+	MATCH all
+	REPLY QR RD RA NOERROR
+	SECTION QUESTION
+		0ttl.example.com. IN A
+	SECTION AUTHORITY
+		example.com IN SOA ns.example.com dns.example.com 1 7200 3600 2419200 10
+ENTRY_END
+
+; Query again
+STEP 60 QUERY
+ENTRY_BEGIN
+	REPLY RD
+	SECTION QUESTION
+		0ttl.example.com. IN A
+ENTRY_END
+
+; Check that we got the correct answer
+STEP 70 CHECK_ANSWER
+ENTRY_BEGIN
+	MATCH all ttl
+	REPLY QR RD RA NOERROR
+	SECTION QUESTION
+		0ttl.example.com. IN A
+	SECTION ANSWER
+		0ttl.example.com. 0 IN A 5.6.7.8
+	SECTION AUTHORITY
+		example.com. 10 IN NS ns.example.com.
+	SECTION ADDITIONAL
+		ns.example.com. 10 IN A 1.2.3.4
+ENTRY_END
+
+SCENARIO_END
diff --git a/contrib/unbound/testdata/serve_expired_0ttl_nxdomain.rpl b/contrib/unbound/testdata/serve_expired_0ttl_nxdomain.rpl
new file mode 100644
index 000000000000..0fcde9f2ddb6
--- /dev/null
+++ b/contrib/unbound/testdata/serve_expired_0ttl_nxdomain.rpl
@@ -0,0 +1,154 @@
+; config options
+server:
+	module-config: "validator iterator"
+	qname-minimisation: "no"
+	minimal-responses: no
+	serve-expired: yes
+	log-servfail: yes
+	ede: yes
+	ede-serve-expired: yes
+
+
+stub-zone:
+	name: "example.com"
+	stub-addr: 1.2.3.4
+CONFIG_END
+
+SCENARIO_BEGIN Test serve-expired with NXDOMAIN followed by 0 TTL
+; Scenario overview:
+; - query for 0ttl.example.com. IN A
+; - answer from upstream is NXDOMAIN; will be cached for the SOA negative TTL.
+; - check that the client gets the NXDOMAIN; also cached
+; - query again right after the TTL expired
+; - this time the server answers with a 0 TTL RRset
+; - check that we get the correct answer
+
+; ns.example.com.
+RANGE_BEGIN 0 20
+	ADDRESS 1.2.3.4
+	; response to A query
+	ENTRY_BEGIN
+		MATCH opcode qtype qname
+		ADJUST copy_id
+		REPLY QR AA NXDOMAIN
+		SECTION QUESTION
+			0ttl.example.com. IN A
+		SECTION AUTHORITY
+			example.com IN SOA ns.example.com dns.example.com 1 7200 3600 2419200 10
+	ENTRY_END
+RANGE_END
+
+; ns.example.com.
+RANGE_BEGIN 30 100
+	ADDRESS 1.2.3.4
+	ENTRY_BEGIN
+		MATCH opcode qtype qname
+		ADJUST copy_id
+		REPLY QR NOERROR
+		SECTION QUESTION
+			example.com. 10 IN NS
+		SECTION ANSWER
+			example.com. 10 IN NS ns.example.com.
+		SECTION ADDITIONAL
+			ns.example.com. 10 IN A 1.2.3.4
+	ENTRY_END
+
+	ENTRY_BEGIN
+		MATCH opcode qtype qname
+		ADJUST copy_id
+		REPLY QR NOERROR
+		SECTION QUESTION
+			0ttl.example.com. IN A
+		SECTION ANSWER
+			0ttl.example.com. 0 IN A 5.6.7.8
+		SECTION AUTHORITY
+			example.com. 10 IN NS ns.example.com.
+		SECTION ADDITIONAL
+			ns.example.com. 10 IN A 1.2.3.4
+	ENTRY_END
+RANGE_END
+
+; Query with RD flag
+STEP 0 QUERY
+ENTRY_BEGIN
+	REPLY RD
+	SECTION QUESTION
+		0ttl.example.com. IN A
+ENTRY_END
+
+; Check that we get the SERVFAIL (will be cached)
+STEP 10 CHECK_ANSWER
+ENTRY_BEGIN
+	MATCH all
+	REPLY QR RD RA NXDOMAIN
+	SECTION QUESTION
+		0ttl.example.com. IN A
+	SECTION AUTHORITY
+		example.com IN SOA ns.example.com dns.example.com 1 7200 3600 2419200 10
+ENTRY_END
+
+; Query again
+STEP 20 QUERY
+ENTRY_BEGIN
+	REPLY RD
+	SECTION QUESTION
+		0ttl.example.com. IN A
+ENTRY_END
+
+; Check that we get the cached NXDOMAIN
+STEP 30 CHECK_ANSWER
+ENTRY_BEGIN
+	MATCH all
+	REPLY QR RD RA NXDOMAIN
+	SECTION QUESTION
+		0ttl.example.com. IN A
+	SECTION AUTHORITY
+		example.com IN SOA ns.example.com dns.example.com 1 7200 3600 2419200 10
+ENTRY_END
+
+; Wait for the NXDOMAIN to expire
+STEP 31 TIME_PASSES ELAPSE 32
+
+; Query again
+STEP 40 QUERY
+ENTRY_BEGIN
+	REPLY RD
+	SECTION QUESTION
+		0ttl.example.com. IN A
+ENTRY_END
+
+; Check that we get the cached NXDOMAIN
+STEP 50 CHECK_ANSWER
+ENTRY_BEGIN
+	MATCH all
+	REPLY QR RD RA NXDOMAIN
+	SECTION QUESTION
+		0ttl.example.com. IN A
+	SECTION AUTHORITY
+		example.com IN SOA ns.example.com dns.example.com 1 7200 3600 2419200 10
+ENTRY_END
+
+; Query again
+STEP 60 QUERY
+ENTRY_BEGIN
+	REPLY RD
+	SECTION QUESTION
+		0ttl.example.com. IN A
+ENTRY_END
+
+; Check that we got the correct answer
+STEP 70 CHECK_ANSWER
+ENTRY_BEGIN
+	MATCH all ttl
+	REPLY QR RD RA NOERROR
+	SECTION QUESTION
+		0ttl.example.com. IN A
+	SECTION ANSWER
+		0ttl.example.com. 0 IN A 5.6.7.8
+	SECTION AUTHORITY
+		example.com. 10 IN NS ns.example.com.
+	SECTION ADDITIONAL
+		ns.example.com. 10 IN A 1.2.3.4
+ENTRY_END
+
+SCENARIO_END
diff --git a/contrib/unbound/testdata/serve_expired_0ttl_servfail.rpl b/contrib/unbound/testdata/serve_expired_0ttl_servfail.rpl
new file mode 100644
index 000000000000..aad7aa8c984f
--- /dev/null
+++ b/contrib/unbound/testdata/serve_expired_0ttl_servfail.rpl
@@ -0,0 +1,129 @@
+; config options
+server:
+	module-config: "validator iterator"
+	qname-minimisation: "no"
+	minimal-responses: no
+	serve-expired: yes
+	log-servfail: yes
+	ede: yes
+	ede-serve-expired: yes
+
+
+stub-zone:
+	name: "example.com"
+	stub-addr: 1.2.3.4
+CONFIG_END
+
+SCENARIO_BEGIN Test serve-expired with SERVFAIL followed by 0 TTL
+; Scenario overview:
+; - query for 0ttl.example.com. IN A
+; - answer from upstream is SERVFAIL; will be cached for NORR_TTL(5)
+; - check that the client gets the SERVFAIL; also cached
+; - query again right after the TTL expired
+; - this time the server answers with a 0 TTL RRset
+; - check that we get the correct answer
+
+; ns.example.com.
+RANGE_BEGIN 0 20
+	ADDRESS 1.2.3.4
+	; response to A query
+	ENTRY_BEGIN
+		MATCH opcode qtype qname
+		ADJUST copy_id
+		REPLY QR AA SERVFAIL
+		SECTION QUESTION
+			0ttl.example.com. IN A
+	ENTRY_END
+RANGE_END
+
+; ns.example.com.
+RANGE_BEGIN 30 100
+	ADDRESS 1.2.3.4
+	ENTRY_BEGIN
+		MATCH opcode qtype qname
+		ADJUST copy_id
+		REPLY QR NOERROR
+		SECTION QUESTION
+			example.com. 10 IN NS
+		SECTION ANSWER
+			example.com. 10 IN NS ns.example.com.
+		SECTION ADDITIONAL
+			ns.example.com. 10 IN A 1.2.3.4
+	ENTRY_END
+
+	ENTRY_BEGIN
+		MATCH opcode qtype qname
+		ADJUST copy_id
+		REPLY QR NOERROR
+		SECTION QUESTION
+			0ttl.example.com. IN A
+		SECTION ANSWER
+			0ttl.example.com. 0 IN A 5.6.7.8
+		SECTION AUTHORITY
+			example.com. 10 IN NS ns.example.com.
+		SECTION ADDITIONAL
+			ns.example.com. 10 IN A 1.2.3.4
+	ENTRY_END
+RANGE_END
+
+; Query with RD flag
+STEP 0 QUERY
+ENTRY_BEGIN
+	REPLY RD
+	SECTION QUESTION
+		0ttl.example.com. IN A
+ENTRY_END
+
+; Check that we get the SERVFAIL (will be cached)
+STEP 10 CHECK_ANSWER
+ENTRY_BEGIN
+	MATCH all
+	REPLY QR RD RA SERVFAIL
+	SECTION QUESTION
+		0ttl.example.com. IN A
+ENTRY_END
+
+; Query again
+STEP 20 QUERY
+ENTRY_BEGIN
+	REPLY RD
+	SECTION QUESTION
+		0ttl.example.com. IN A
+ENTRY_END
+
+; Check that we get the cached SERVFAIL
+STEP 30 CHECK_ANSWER
+ENTRY_BEGIN
+	MATCH all
+	REPLY QR RD RA SERVFAIL
+	SECTION QUESTION
+		0ttl.example.com. IN A
+ENTRY_END
+
+; Wait for the SERVFAIL to expire
+STEP 31 TIME_PASSES ELAPSE 32
+
+; Query again
+STEP 40 QUERY
+ENTRY_BEGIN
+	REPLY RD
+	SECTION QUESTION
+		0ttl.example.com. IN A
+ENTRY_END
+
+; Check that we got the correct answer
+STEP 50 CHECK_ANSWER
+ENTRY_BEGIN
+	MATCH all ttl
+	REPLY QR RD RA NOERROR
+	SECTION QUESTION
+		0ttl.example.com. IN A
+	SECTION ANSWER
+		0ttl.example.com. 0 IN A 5.6.7.8
+	SECTION AUTHORITY
+		example.com. 10 IN NS ns.example.com.
+	SECTION ADDITIONAL
+		ns.example.com. 10 IN A 1.2.3.4
+ENTRY_END
+
+SCENARIO_END
diff --git a/contrib/unbound/testdata/serve_expired_cached_servfail_refresh.rpl b/contrib/unbound/testdata/serve_expired_cached_servfail_refresh.rpl
new file mode 100644
index 000000000000..664de9aa8732
--- /dev/null
+++ b/contrib/unbound/testdata/serve_expired_cached_servfail_refresh.rpl
@@ -0,0 +1,145 @@
+; config options
+server:
+	module-config: "validator iterator"
+	qname-minimisation: "no"
+	minimal-responses: no
+	serve-expired: yes
+	serve-expired-reply-ttl: 123
+	log-servfail: yes
+	ede: yes
+	ede-serve-expired: yes
+
+
+stub-zone:
+	name: "example.com"
+	stub-addr: 1.2.3.4
+CONFIG_END
+
+SCENARIO_BEGIN Test serve-expired with client-timeout and a SERVFAIL upstream reply
+; Scenario overview:
+; - query for example.com. IN A
+; - answer from upstream is SERVFAIL; will be cached for NORR_TTL(5)
+; - check that the client gets the SERVFAIL; also cached
+; - query again right after the TTL expired
+; - cached SERVFAIL should be ignored and upstream queried
+; - answer from upstream is still SERVFAIL; the cached error response will be
+;   refreshed for another NORR_TTL(5)
+; - check that the client gets the SERVFAIL
+; - query again; the upstream now has the answer available
+; - check that we get the refreshed cached response instead
+
+; ns.example.com.
+RANGE_BEGIN 0 50
+	ADDRESS 1.2.3.4
+	; response to A query
+	ENTRY_BEGIN
+		MATCH opcode qtype qname
+		ADJUST copy_id
+		REPLY QR AA SERVFAIL
+		SECTION QUESTION
+			example.com. IN A
+	ENTRY_END
+RANGE_END
+
+; ns.example.com.
+RANGE_BEGIN 60 100
+	ADDRESS 1.2.3.4
+	ENTRY_BEGIN
+		MATCH opcode qtype qname
+		ADJUST copy_id
+		REPLY QR NOERROR
+		SECTION QUESTION
+			example.com. 10 IN NS
+		SECTION ANSWER
+			example.com. 10 IN NS ns.example.com.
+		SECTION ADDITIONAL
+			ns.example.com. 10 IN A 1.2.3.4
+	ENTRY_END
+
+	ENTRY_BEGIN
+		MATCH opcode qtype qname
+		ADJUST copy_id
+		REPLY QR NOERROR
+		SECTION QUESTION
+			example.com. IN A
+		SECTION ANSWER
+			example.com. 10 IN A 5.6.7.8
+		SECTION AUTHORITY
+			example.com. 10 IN NS ns.example.com.
+		SECTION ADDITIONAL
+			ns.example.com. 10 IN A 1.2.3.4
+	ENTRY_END
+RANGE_END
+
+; Query with RD flag
+STEP 0 QUERY
+ENTRY_BEGIN
+	REPLY RD
+	SECTION QUESTION
+		example.com. IN A
+ENTRY_END
+
+; Check that we get the SERVFAIL (will be cached)
+STEP 10 CHECK_ANSWER
+ENTRY_BEGIN
+	MATCH all
+	REPLY QR RD RA SERVFAIL
+	SECTION QUESTION
+		example.com. IN A
+ENTRY_END
+
+; Query again
+STEP 20 QUERY
+ENTRY_BEGIN
+	REPLY RD
+	SECTION QUESTION
+		example.com. IN A
+ENTRY_END
+
+; Check that we get the cached SERVFAIL
+STEP 30 CHECK_ANSWER
+ENTRY_BEGIN
+	MATCH all
+	REPLY QR RD RA SERVFAIL
+	SECTION QUESTION
+		example.com. IN A
+ENTRY_END
+
+; Wait for the SERVFAIL to expire
+STEP 31 TIME_PASSES ELAPSE 6
+
+; Query again
+STEP 40 QUERY
+ENTRY_BEGIN
+	REPLY RD
+	SECTION QUESTION
+		example.com. IN A
+ENTRY_END
+
+; Check that we get the SERVFAIL (will be refreshed)
+STEP 50 CHECK_ANSWER
+ENTRY_BEGIN
+	MATCH all
+	REPLY QR RD RA SERVFAIL
+	SECTION QUESTION
+		example.com. IN A
+ENTRY_END
+
+; Query again, upstream has the real answer available
+STEP 60 QUERY
+ENTRY_BEGIN
+	REPLY RD
+	SECTION QUESTION
+		example.com. IN A
+ENTRY_END
+
+; Check that we get the refreshed cached SERVFAIL
+STEP 70 CHECK_ANSWER
+ENTRY_BEGIN
+	MATCH all
+	REPLY QR RD RA SERVFAIL
+	SECTION QUESTION
+		example.com. IN A
+ENTRY_END
+
+SCENARIO_END
diff --git a/contrib/unbound/testdata/stat_values.tdir/stat_values_cachedb.conf b/contrib/unbound/testdata/stat_values.tdir/stat_values_cachedb.conf
new file mode 100644
index 000000000000..b5e9b0e02932
--- /dev/null
+++ b/contrib/unbound/testdata/stat_values.tdir/stat_values_cachedb.conf
@@ -0,0 +1,36 @@
+server:
+	verbosity: 5
+	module-config: "cachedb iterator"
+	serve-expired: yes
+	num-threads: 1
+	interface: 127.0.0.1
+	port: @PORT@
+	use-syslog: no
+	directory: ""
+	pidfile: "unbound.pid"
+	chroot: ""
+	username: ""
+	do-not-query-localhost: no
+	extended-statistics: yes
+	identity: "stat_values"
+	outbound-msg-retry: 0
+	root-key-sentinel: no
+	trust-anchor-signaling: no
+
+	local-zone: local.zone static
+	local-data: "www.local.zone A 192.0.2.1"
+remote-control:
+	control-enable: yes
+	control-interface: 127.0.0.1
+	# control-interface: ::1
+	control-port: @CONTROL_PORT@
+	server-key-file: "unbound_server.key"
+	server-cert-file: "unbound_server.pem"
+	control-key-file: "unbound_control.key"
+	control-cert-file: "unbound_control.pem"
+forward-zone:
+	name: "."
+	forward-addr: "127.0.0.1@@TOPORT@"
+forward-zone:
+	name: "expired."
+	forward-addr: "127.0.0.1@@EXPIREDPORT@"
diff --git a/contrib/unbound/testdata/stat_values.tdir/stat_values_downstream_cookies.conf b/contrib/unbound/testdata/stat_values.tdir/stat_values_downstream_cookies.conf
new file mode 100644
index 000000000000..21e78829fc8e
--- /dev/null
+++ b/contrib/unbound/testdata/stat_values.tdir/stat_values_downstream_cookies.conf
@@ -0,0 +1,32 @@
+server:
+	verbosity: 5
+	module-config: "iterator"
+	num-threads: 1
+	interface: 127.0.0.1
+	port: @PORT@
+	use-syslog: no
+	directory: ""
+	pidfile: "unbound.pid"
+	chroot: ""
+	username: ""
+	extended-statistics: yes
+	identity: "stat_values"
+	outbound-msg-retry: 0
+	root-key-sentinel: no
+	trust-anchor-signaling: no
+
+	local-zone: local.zone static
+	local-data: "www.local.zone A 192.0.2.1"
+
+	answer-cookie: yes
+	access-control: 127.0.0.1 allow_cookie
+
+remote-control:
+	control-enable: yes
+	control-interface: 127.0.0.1
+	# control-interface: ::1
+	control-port: @CONTROL_PORT@
+	server-key-file: "unbound_server.key"
+	server-cert-file: "unbound_server.pem"
+	control-key-file: "unbound_control.key"
+	control-cert-file: "unbound_control.pem"
diff --git a/contrib/unbound/testdata/subnet_cached_ede.crpl b/contrib/unbound/testdata/subnet_cached_ede.crpl
new file mode 100644
index 000000000000..36bb28fcc180
--- /dev/null
+++ b/contrib/unbound/testdata/subnet_cached_ede.crpl
@@ -0,0 +1,114 @@
+; Ask the same question twice. Check to see second is answered
+; from cache
+
+server:
+	trust-anchor-signaling: no
+	target-fetch-policy: "0 0 0 0 0"
+	send-client-subnet: 1.2.3.4
+	max-client-subnet-ipv4: 17
+	module-config: "subnetcache validator iterator"
+	verbosity: 3
+	qname-minimisation: no
+	minimal-responses: no
+	ede: yes
+	val-log-level: 2
+        trust-anchor: "example.nl. DS 50602 8 2 FA8EE175C47325F4BD46D8A4083C3EBEB11C977D689069F2B41F1A29B22446B1"
+
+stub-zone:
+	name: "example.nl"
+	stub-addr:  1.2.3.4
+CONFIG_END
+
+SCENARIO_BEGIN Test subnetcache support for caching EDEs.
+
+; ns.example.com.
+RANGE_BEGIN 0 10
+	ADDRESS 1.2.3.4
+ENTRY_BEGIN
+MATCH opcode qtype qname
+ADJUST copy_id
+REPLY QR AA NOERROR
+SECTION QUESTION
+example.nl.	IN	DNSKEY
+SECTION ANSWER
+SECTION ADDITIONAL
+	HEX_EDNSDATA_BEGIN
+				; client is 127.0.0.1
+		00 08 		; OPC
+		00 07 		; option length
+		00 01 		; Family
+		11 00 		; source mask, scopemask
+		7f 00 00 	; address
+	HEX_EDNSDATA_END
+ENTRY_END
+
+ENTRY_BEGIN
+MATCH opcode qtype qname
+ADJUST copy_id
+REPLY QR AA NOERROR
+SECTION QUESTION
+example.nl.	IN	A
+SECTION ANSWER
+example.nl.	IN	A	1.2.3.4
+SECTION ADDITIONAL
+	HEX_EDNSDATA_BEGIN
+				; client is 127.0.0.1
+		00 08 		; OPC
+		00 07 		; option length
+		00 01 		; Family
+		11 00 		; source mask, scopemask
+		7f 00 00 	; address
+	HEX_EDNSDATA_END
+ENTRY_END
+RANGE_END
+			ns.example.com.		IN 	A	1.2.3.4
+	ENTRY_END
+RANGE_END
+
+; get the entry in cache.
+STEP 1 QUERY
+ENTRY_BEGIN
+REPLY RD DO
+SECTION QUESTION
+example.nl. IN A
+SECTION ADDITIONAL
+	HEX_EDNSDATA_BEGIN
+		00 08 00 07	; OPC, optlen
+		00 01 11 00	; ip4, scope 17, source 0
+		7f 00 00   	; 127.0.0.0/17
+	HEX_EDNSDATA_END
+ENTRY_END
+
+; get the answer for it
+STEP 10 CHECK_ANSWER
+ENTRY_BEGIN
+MATCH all ede=9
+REPLY QR RD RA DO SERVFAIL
+SECTION QUESTION
+example.nl. IN A
+ENTRY_END
+
+; query again for the cached entry
+STEP 20 QUERY
+ENTRY_BEGIN
+REPLY RD
+SECTION QUESTION
+example.nl. IN A
+SECTION ADDITIONAL
+	HEX_EDNSDATA_BEGIN
+		00 08 00 07	; OPC, optlen
+		00 01 11 00	; ip4, scope 17, source 0
+		7f 00 00   	; 127.0.0.0/17
+	HEX_EDNSDATA_END
+ENTRY_END
+
+; this must be a cached answer since stub is not answering in this range
+STEP 30 CHECK_ANSWER
+ENTRY_BEGIN
+MATCH all ede=9
+REPLY QR RD RA DO SERVFAIL
+SECTION QUESTION
+example.nl. IN A
+ENTRY_END
+
+SCENARIO_END
diff --git a/contrib/unbound/testdata/subnet_global_prefetch.crpl b/contrib/unbound/testdata/subnet_global_prefetch.crpl
new file mode 100644
index 000000000000..2f005d43b905
--- /dev/null
+++ b/contrib/unbound/testdata/subnet_global_prefetch.crpl
@@ -0,0 +1,236 @@
+; Check if the prefetch option works properly for messages stored in the global
+; cache for non-ECS clients. The prefetch query needs to result in an ECS
+; outgoing query based on the client's IP.
+
+server:
+	trust-anchor-signaling: no
+	target-fetch-policy: "0 0 0 0 0"
+	send-client-subnet: 1.2.3.4
+	max-client-subnet-ipv4: 21
+	module-config: "subnetcache iterator"
+	verbosity: 3
+	access-control: 127.0.0.1 allow_snoop
+	qname-minimisation: no
+	minimal-responses: no
+	prefetch: yes
+
+stub-zone:
+	name: "."
+	stub-addr: 193.0.14.129 	# K.ROOT-SERVERS.NET.
+CONFIG_END
+
+SCENARIO_BEGIN Test prefetch option for global cache with ECS enabled
+
+; K.ROOT-SERVERS.NET.
+RANGE_BEGIN 0 100
+	ADDRESS 193.0.14.129
+	ENTRY_BEGIN
+		MATCH opcode qtype qname ednsdata
+		ADJUST copy_id
+		REPLY QR NOERROR
+		SECTION QUESTION
+			. IN NS
+		SECTION ANSWER
+			. IN NS	K.ROOT-SERVERS.NET.
+		SECTION ADDITIONAL
+			HEX_EDNSDATA_BEGIN
+				;; we expect to receive empty
+			HEX_EDNSDATA_END
+			K.ROOT-SERVERS.NET.	IN	A	193.0.14.129
+	ENTRY_END
+
+	ENTRY_BEGIN
+		MATCH opcode qtype qname
+		ADJUST copy_id
+		REPLY QR NOERROR
+		SECTION QUESTION
+			www.example.com. IN A
+		SECTION AUTHORITY
+			com.	IN NS	a.gtld-servers.net.
+		SECTION ADDITIONAL
+			a.gtld-servers.net.	IN 	A	192.5.6.30
+	ENTRY_END
+RANGE_END
+
+; a.gtld-servers.net.
+RANGE_BEGIN 0 100
+	ADDRESS 192.5.6.30
+	ENTRY_BEGIN
+		MATCH opcode qtype qname ednsdata
+		ADJUST copy_id
+		REPLY QR NOERROR
+		SECTION QUESTION
+			com. IN NS
+		SECTION ANSWER
+			com.    IN NS   a.gtld-servers.net.
+		SECTION ADDITIONAL
+			HEX_EDNSDATA_BEGIN
+				;; we expect to receive empty
+			HEX_EDNSDATA_END
+			a.gtld-servers.net.     IN      A       192.5.6.30
+	ENTRY_END
+
+	ENTRY_BEGIN
+		MATCH opcode qtype qname
+		ADJUST copy_id
+		REPLY QR NOERROR
+		SECTION QUESTION
+			www.example.com. IN A
+		SECTION AUTHORITY
+			example.com.	IN NS	ns.example.com.
+		SECTION ADDITIONAL
+			ns.example.com.		IN 	A	1.2.3.4
+	ENTRY_END
+RANGE_END
+
+; ns.example.com.
+RANGE_BEGIN 0 10
+	ADDRESS 1.2.3.4
+	ENTRY_BEGIN
+		MATCH opcode qtype qname
+		ADJUST copy_id
+		REPLY QR NOERROR
+		SECTION QUESTION
+			example.com. IN NS
+		SECTION ANSWER
+			example.com.    IN NS   ns.example.com.
+		SECTION ADDITIONAL
+			HEX_EDNSDATA_BEGIN
+				;; we expect to receive empty
+			HEX_EDNSDATA_END
+			ns.example.com.         IN      A       1.2.3.4
+	ENTRY_END
+
+	; response to query of interest
+	ENTRY_BEGIN
+		MATCH opcode qtype qname
+		ADJUST copy_id
+		REPLY QR NOERROR
+		SECTION QUESTION
+			www.example.com. IN A
+		SECTION ANSWER
+			www.example.com. 10 IN A	10.20.30.40
+		SECTION AUTHORITY
+			example.com.	IN NS	ns.example.com.
+		SECTION ADDITIONAL
+			ns.example.com.		IN 	A	1.2.3.4
+	ENTRY_END
+RANGE_END
+
+; ns.example.com.
+RANGE_BEGIN 11 100
+	ADDRESS 1.2.3.4
+	ENTRY_BEGIN
+		MATCH opcode qtype qname
+		ADJUST copy_id
+		REPLY QR NOERROR
+		SECTION QUESTION
+			example.com. IN NS
+		SECTION ANSWER
+			example.com.    IN NS   ns.example.com.
+		SECTION ADDITIONAL
+			HEX_EDNSDATA_BEGIN
+				;; we expect to receive empty
+			HEX_EDNSDATA_END
+			ns.example.com.         IN      A       1.2.3.4
+	ENTRY_END
+
+	; response to query of interest
+	ENTRY_BEGIN
+		MATCH opcode qtype qname ednsdata
+		ADJUST copy_id copy_ednsdata_assume_clientsubnet
+		REPLY QR NOERROR
+		SECTION QUESTION
+			www.example.com. IN A
+		SECTION ANSWER
+			www.example.com. 10 IN A	10.20.30.40
+		SECTION AUTHORITY
+			example.com.	IN NS	ns.example.com.
+		SECTION ADDITIONAL
+			HEX_EDNSDATA_BEGIN
+						; client is 127.0.0.1
+				00 08 		; OPC
+				00 07 		; option length
+				00 01 		; Family
+				15 00 		; source mask, scopemask
+				7f 00 00 	; address
+			HEX_EDNSDATA_END
+			ns.example.com.		IN 	A	1.2.3.4
+	ENTRY_END
+RANGE_END
+
+STEP 1 QUERY
+ENTRY_BEGIN
+REPLY RD
+SECTION QUESTION
+www.example.com. IN A
+ENTRY_END
+
+; This answer should be in the global cache (because no ECS from upstream)
+STEP 2 CHECK_ANSWER
+ENTRY_BEGIN
+MATCH all
+REPLY QR RD RA NOERROR
+SECTION QUESTION
+www.example.com. IN A
+SECTION ANSWER
+www.example.com. IN A	10.20.30.40
+SECTION AUTHORITY
+example.com.	IN NS	ns.example.com.
+SECTION ADDITIONAL
+ns.example.com.		IN 	A	1.2.3.4
+ENTRY_END
+
+; Try to trigger a prefetch
+STEP 3 TIME_PASSES ELAPSE 9
+
+STEP 11 QUERY
+ENTRY_BEGIN
+REPLY RD
+SECTION QUESTION
+www.example.com. IN A
+ENTRY_END
+
+; This record came from the global cache and a prefetch was triggered.
+STEP 12 CHECK_ANSWER
+ENTRY_BEGIN
+MATCH all ttl
+REPLY QR RD RA NOERROR
+SECTION QUESTION
+www.example.com. IN A
+SECTION ANSWER
+www.example.com. 1 IN A	10.20.30.40
+SECTION AUTHORITY
+example.com.	3591 IN NS	ns.example.com.
+SECTION ADDITIONAL
+ns.example.com.	3591 IN 	A	1.2.3.4
+ENTRY_END
+
+; Allow time to pass so that the global cache record is expired.
+STEP 13 TIME_PASSES ELAPSE 2
+
+; Query again to verify that the record was prefetched and stored in the ECS
+; cache.
+STEP 15 QUERY
+ENTRY_BEGIN
+REPLY RD
+SECTION QUESTION
+www.example.com. IN A
+ENTRY_END
+
+; This record came from the ECS cache.
+STEP 16 CHECK_ANSWER
+ENTRY_BEGIN
+MATCH all ttl
+REPLY QR RD RA NOERROR
+SECTION QUESTION
+www.example.com. IN A
+SECTION ANSWER
+www.example.com. 8 IN A	10.20.30.40
+SECTION AUTHORITY
+example.com.	3598 IN NS	ns.example.com.
+SECTION ADDITIONAL
+ns.example.com.	3598 IN 	A	1.2.3.4
+ENTRY_END
+
+SCENARIO_END
diff --git a/contrib/unbound/testdata/subnet_global_prefetch_always_forward.crpl b/contrib/unbound/testdata/subnet_global_prefetch_always_forward.crpl
new file mode 100644
index 000000000000..ccfe5dfd6ea1
--- /dev/null
+++ b/contrib/unbound/testdata/subnet_global_prefetch_always_forward.crpl
@@ -0,0 +1,167 @@
+; Check if the prefetch option works properly when serve-expired is combined
+; with client-subnet-always-forward for non-ECS clients. The prefetch query
+; needs to result in an outgoing query without ECS.
+
+server:
+	trust-anchor-signaling: no
+	target-fetch-policy: "0 0 0 0 0"
+	serve-expired: yes
+	client-subnet-always-forward: yes
+	module-config: "subnetcache iterator"
+	verbosity: 3
+	access-control: 127.0.0.1 allow_snoop
+	qname-minimisation: no
+	minimal-responses: no
+
+stub-zone:
+	name: "."
+	stub-addr: 193.0.14.129 	# K.ROOT-SERVERS.NET.
+CONFIG_END
+
+SCENARIO_BEGIN Test serve-expired and client-subnet-always-forward without ECS in the request
+
+; K.ROOT-SERVERS.NET.
+RANGE_BEGIN 0 100
+	ADDRESS 193.0.14.129
+	ENTRY_BEGIN
+		MATCH opcode qtype qname ednsdata
+		ADJUST copy_id
+		REPLY QR NOERROR
+		SECTION QUESTION
+			. IN NS
+		SECTION ANSWER
+			. IN NS	K.ROOT-SERVERS.NET.
+		SECTION ADDITIONAL
+			K.ROOT-SERVERS.NET.	IN	A	193.0.14.129
+	ENTRY_END
+
+	ENTRY_BEGIN
+		MATCH opcode qtype qname
+		ADJUST copy_id
+		REPLY QR NOERROR
+		SECTION QUESTION
+			www.example.com. IN A
+		SECTION AUTHORITY
+			com.	IN NS	a.gtld-servers.net.
+		SECTION ADDITIONAL
+			a.gtld-servers.net.	IN 	A	192.5.6.30
+	ENTRY_END
+RANGE_END
+
+; a.gtld-servers.net.
+RANGE_BEGIN 0 100
+	ADDRESS 192.5.6.30
+	ENTRY_BEGIN
+		MATCH opcode qtype qname ednsdata
+		ADJUST copy_id
+		REPLY QR NOERROR
+		SECTION QUESTION
+			com. IN NS
+		SECTION ANSWER
+			com.    IN NS   a.gtld-servers.net.
+		SECTION ADDITIONAL
+			a.gtld-servers.net.     IN      A       192.5.6.30
+	ENTRY_END
+
+	ENTRY_BEGIN
+		MATCH opcode qtype qname
+		ADJUST copy_id
+		REPLY QR NOERROR
+		SECTION QUESTION
+			www.example.com. IN A
+		SECTION AUTHORITY
+			example.com.	IN NS	ns.example.com.
+		SECTION ADDITIONAL
+			ns.example.com.		IN 	A	1.2.3.4
+	ENTRY_END
+RANGE_END
+
+; ns.example.com.
+RANGE_BEGIN 0 100
+	ADDRESS 1.2.3.4
+	ENTRY_BEGIN
+		MATCH opcode qtype qname
+		ADJUST copy_id
+		REPLY QR NOERROR
+		SECTION QUESTION
+			example.com. IN NS
+		SECTION ANSWER
+			example.com.    IN NS   ns.example.com.
+		SECTION ADDITIONAL
+			ns.example.com.         IN      A       1.2.3.4
+	ENTRY_END
+
+	; response to query of interest
+	ENTRY_BEGIN
+		MATCH opcode qtype qname
+		ADJUST copy_id
+		REPLY QR NOERROR
+		SECTION QUESTION
+			www.example.com. IN A
+		SECTION ANSWER
+			www.example.com. 10 IN A	10.20.30.40
+		SECTION AUTHORITY
+			example.com.	IN NS	ns.example.com.
+		SECTION ADDITIONAL
+			ns.example.com.		IN 	A	1.2.3.4
+	ENTRY_END
+RANGE_END
+
+STEP 1 QUERY
+ENTRY_BEGIN
+REPLY RD
+SECTION QUESTION
+www.example.com. IN A
+ENTRY_END
+
+; This answer should be in the global cache
+STEP 2 CHECK_ANSWER
+ENTRY_BEGIN
+MATCH all
+REPLY QR RD RA NOERROR
+SECTION QUESTION
+www.example.com.	IN A
+SECTION ANSWER
+www.example.com.	IN A	10.20.30.40
+SECTION AUTHORITY
+example.com.		IN NS	ns.example.com.
+SECTION ADDITIONAL
+ns.example.com.		IN A	1.2.3.4
+ENTRY_END
+
+; Wait for the TTL to expire
+STEP 3 TIME_PASSES ELAPSE 20
+
+STEP 11 QUERY
+ENTRY_BEGIN
+REPLY RD
+SECTION QUESTION
+www.example.com. IN A
+ENTRY_END
+
+; This record came from the global cache and a prefetch was triggered
+STEP 12 CHECK_ANSWER
+ENTRY_BEGIN
+MATCH all ttl
+REPLY QR RD RA NOERROR
+SECTION QUESTION
+www.example.com.		IN A
+SECTION ANSWER
+www.example.com.	30	IN A	10.20.30.40
+SECTION AUTHORITY
+example.com.		3580	IN NS	ns.example.com.
+SECTION ADDITIONAL
+ns.example.com.		3580	IN A	1.2.3.4
+ENTRY_END
+
+STEP 13 CHECK_OUT_QUERY
+ENTRY_BEGIN
+        MATCH all
+	REPLY NOERROR DO
+        SECTION QUESTION
+                www.example.com. IN A
+ENTRY_END
+
+STEP 14 TRAFFIC
+
+SCENARIO_END
diff --git a/contrib/unbound/testdata/subnet_global_prefetch_expired.crpl b/contrib/unbound/testdata/subnet_global_prefetch_expired.crpl
new file mode 100644
index 000000000000..de1b780553a9
--- /dev/null
+++ b/contrib/unbound/testdata/subnet_global_prefetch_expired.crpl
@@ -0,0 +1,241 @@
+; Check if the prefetch option works properly for messages stored in the global
+; cache for non-ECS clients. The prefetch query needs to result in an ECS
+; outgoing query based on the client's IP.
+; Prefetch initiated via serve-expired.
+
+server:
+	trust-anchor-signaling: no
+	target-fetch-policy: "0 0 0 0 0"
+	send-client-subnet: 1.2.3.4
+	max-client-subnet-ipv4: 21
+	module-config: "subnetcache iterator"
+	verbosity: 3
+	access-control: 127.0.0.1 allow_snoop
+	qname-minimisation: no
+	minimal-responses: no
+	serve-expired: yes
+	serve-expired-ttl: 1
+	prefetch: yes
+
+stub-zone:
+	name: "."
+	stub-addr: 193.0.14.129 	# K.ROOT-SERVERS.NET.
+CONFIG_END
+
+SCENARIO_BEGIN Test prefetch option for global cache with ECS enabled (initiated via serve-expired)
+
+; K.ROOT-SERVERS.NET.
+RANGE_BEGIN 0 100
+	ADDRESS 193.0.14.129
+	ENTRY_BEGIN
+		MATCH opcode qtype qname ednsdata
+		ADJUST copy_id
+		REPLY QR NOERROR
+		SECTION QUESTION
+			. IN NS
+		SECTION ANSWER
+			. IN NS	K.ROOT-SERVERS.NET.
+		SECTION ADDITIONAL
+			HEX_EDNSDATA_BEGIN
+				;; we expect to receive empty
+			HEX_EDNSDATA_END
+			K.ROOT-SERVERS.NET.	IN	A	193.0.14.129
+	ENTRY_END
+
+	ENTRY_BEGIN
+		MATCH opcode qtype qname
+		ADJUST copy_id
+		REPLY QR NOERROR
+		SECTION QUESTION
+			www.example.com. IN A
+		SECTION AUTHORITY
+			com.	IN NS	a.gtld-servers.net.
+		SECTION ADDITIONAL
+			a.gtld-servers.net.	IN 	A	192.5.6.30
+	ENTRY_END
+RANGE_END
+
+; a.gtld-servers.net.
+RANGE_BEGIN 0 100
+	ADDRESS 192.5.6.30
+	ENTRY_BEGIN
+		MATCH opcode qtype qname ednsdata
+		ADJUST copy_id
+		REPLY QR NOERROR
+		SECTION QUESTION
+			com. IN NS
+		SECTION ANSWER
+			com.    IN NS   a.gtld-servers.net.
+		SECTION ADDITIONAL
+			HEX_EDNSDATA_BEGIN
+				;; we expect to receive empty
+			HEX_EDNSDATA_END
+			a.gtld-servers.net.     IN      A       192.5.6.30
+	ENTRY_END
+
+	ENTRY_BEGIN
+		MATCH opcode qtype qname
+		ADJUST copy_id
+		REPLY QR NOERROR
+		SECTION QUESTION
+			www.example.com. IN A
+		SECTION AUTHORITY
+			example.com.	IN NS	ns.example.com.
+		SECTION ADDITIONAL
+			ns.example.com.		IN 	A	1.2.3.4
+	ENTRY_END
+RANGE_END
+
+; ns.example.com.
+RANGE_BEGIN 0 10
+	ADDRESS 1.2.3.4
+	ENTRY_BEGIN
+		MATCH opcode qtype qname
+		ADJUST copy_id
+		REPLY QR NOERROR
+		SECTION QUESTION
+			example.com. IN NS
+		SECTION ANSWER
+			example.com.    IN NS   ns.example.com.
+		SECTION ADDITIONAL
+			HEX_EDNSDATA_BEGIN
+				;; we expect to receive empty
+			HEX_EDNSDATA_END
+			ns.example.com.         IN      A       1.2.3.4
+	ENTRY_END
+
+	; response to query of interest
+	ENTRY_BEGIN
+		MATCH opcode qtype qname
+		ADJUST copy_id
+		REPLY QR NOERROR
+		SECTION QUESTION
+			www.example.com. IN A
+		SECTION ANSWER
+			www.example.com. 10 IN A	10.20.30.40
+		SECTION AUTHORITY
+			example.com.	IN NS	ns.example.com.
+		SECTION ADDITIONAL
+			ns.example.com.		IN 	A	1.2.3.4
+	ENTRY_END
+RANGE_END
+
+; ns.example.com.
+RANGE_BEGIN 11 100
+	ADDRESS 1.2.3.4
+	ENTRY_BEGIN
+		MATCH opcode qtype qname
+		ADJUST copy_id
+		REPLY QR NOERROR
+		SECTION QUESTION
+			example.com. IN NS
+		SECTION ANSWER
+			example.com.    IN NS   ns.example.com.
+		SECTION ADDITIONAL
+			HEX_EDNSDATA_BEGIN
+				;; we expect to receive empty
+			HEX_EDNSDATA_END
+			ns.example.com.         IN      A       1.2.3.4
+	ENTRY_END
+
+	; response to query of interest
+	ENTRY_BEGIN
+		MATCH opcode qtype qname ednsdata
+		ADJUST copy_id copy_ednsdata_assume_clientsubnet
+		REPLY QR NOERROR
+		SECTION QUESTION
+			www.example.com. IN A
+		SECTION ANSWER
+			www.example.com. 10 IN A	10.20.30.40
+		SECTION AUTHORITY
+			example.com.	IN NS	ns.example.com.
+		SECTION ADDITIONAL
+			HEX_EDNSDATA_BEGIN
+						; client is 127.0.0.1
+				00 08 		; OPC
+				00 07 		; option length
+				00 01 		; Family
+				15 00 		; source mask, scopemask
+				7f 00 00 	; address
+			HEX_EDNSDATA_END
+			ns.example.com.		IN 	A	1.2.3.4
+	ENTRY_END
+RANGE_END
+
+STEP 1 QUERY
+ENTRY_BEGIN
+REPLY RD
+SECTION QUESTION
+www.example.com. IN A
+ENTRY_END
+
+; This answer should be in the global cache (because no ECS from upstream)
+STEP 2 CHECK_ANSWER
+ENTRY_BEGIN
+MATCH all
+REPLY QR RD RA NOERROR
+SECTION QUESTION
+www.example.com. IN A
+SECTION ANSWER
+www.example.com. IN A	10.20.30.40
+SECTION AUTHORITY
+example.com.	IN NS	ns.example.com.
+SECTION ADDITIONAL
+ns.example.com.		IN 	A	1.2.3.4
+ENTRY_END
+
+; Try to trigger a prefetch with expired data
+STEP 3 TIME_PASSES ELAPSE 11
+
+STEP 11 QUERY
+ENTRY_BEGIN
+REPLY RD
+SECTION QUESTION
+www.example.com. IN A
+ENTRY_END
+
+; This expired record came from the global cache and a prefetch is triggered.
+STEP 12 CHECK_ANSWER
+ENTRY_BEGIN
+MATCH all ttl
+REPLY QR RD RA NOERROR
+SECTION QUESTION
+www.example.com. IN A
+SECTION ANSWER
+www.example.com. 30 IN A	10.20.30.40
+SECTION AUTHORITY
+example.com.	3589 IN NS	ns.example.com.
+SECTION ADDITIONAL
+ns.example.com.	3589 IN 	A	1.2.3.4
+ENTRY_END
+
+;STEP 13 TRAFFIC
+; Allow enough time to pass so that the expired record from the global cache
+; cannot be used anymore.
+STEP 14 TIME_PASSES ELAPSE 1
+
+; Query again to verify that the record was prefetched and stored in the ECS
+; cache.
+STEP 15 QUERY
+ENTRY_BEGIN
+REPLY RD
+SECTION QUESTION
+www.example.com. IN A
+ENTRY_END
+
+; This record came from the ECS cache.
+STEP 16 CHECK_ANSWER
+ENTRY_BEGIN
+MATCH all ttl
+REPLY QR RD RA NOERROR
+SECTION QUESTION
+www.example.com. IN A
+SECTION ANSWER
+www.example.com. 9 IN A	10.20.30.40
+SECTION AUTHORITY
+example.com.	3599 IN NS	ns.example.com.
+SECTION ADDITIONAL
+ns.example.com.	3599 IN 	A	1.2.3.4
+ENTRY_END
+
+SCENARIO_END
diff --git a/contrib/unbound/testdata/val_any_negcache.rpl b/contrib/unbound/testdata/val_any_negcache.rpl
new file mode 100644
index 000000000000..77aacba8cc13
--- /dev/null
+++ b/contrib/unbound/testdata/val_any_negcache.rpl
@@ -0,0 +1,240 @@
+; config options
+; The island of trust is at example.com
+server:
+	trust-anchor: "example.com.    3600    IN      DS      2854 3 1 46e4ffc6e9a4793b488954bd3f0cc6af0dfb201b"
+	val-override-date: "20070916134226"
+	target-fetch-policy: "0 0 0 0 0"
+	qname-minimisation: "no"
+	fake-sha1: yes
+	trust-anchor-signaling: no
+	rrset-roundrobin: no
+	aggressive-nsec: yes
+	harden-unknown-additional: yes
+
+stub-zone:
+	name: "."
+	stub-addr: 193.0.14.129 	# K.ROOT-SERVERS.NET.
+CONFIG_END
+
+SCENARIO_BEGIN Test validator with response to qtype ANY and negative cache.
+
+; K.ROOT-SERVERS.NET.
+RANGE_BEGIN 0 100
+	ADDRESS 193.0.14.129 
+ENTRY_BEGIN
+MATCH opcode qtype qname
+ADJUST copy_id
+REPLY QR NOERROR
+SECTION QUESTION
+. IN NS
+SECTION ANSWER
+. IN NS	K.ROOT-SERVERS.NET.
+SECTION ADDITIONAL
+K.ROOT-SERVERS.NET.	IN	A	193.0.14.129
+ENTRY_END
+
+ENTRY_BEGIN
+MATCH opcode subdomain
+ADJUST copy_id copy_query
+REPLY QR NOERROR
+SECTION QUESTION
+com. IN NS
+SECTION AUTHORITY
+com.	IN NS	a.gtld-servers.net.
+SECTION ADDITIONAL
+a.gtld-servers.net.	IN 	A	192.5.6.30
+ENTRY_END
+RANGE_END
+
+; a.gtld-servers.net.
+RANGE_BEGIN 0 100
+	ADDRESS 192.5.6.30
+ENTRY_BEGIN
+MATCH opcode qtype qname
+ADJUST copy_id
+REPLY QR NOERROR
+SECTION QUESTION
+com. IN NS
+SECTION ANSWER
+com.    IN NS   a.gtld-servers.net.
+SECTION ADDITIONAL
+a.gtld-servers.net.     IN      A       192.5.6.30
+ENTRY_END
+
+ENTRY_BEGIN
+MATCH opcode subdomain
+ADJUST copy_id copy_query
+REPLY QR NOERROR
+SECTION QUESTION
+example.com. IN NS
+SECTION AUTHORITY
+example.com.	IN NS	ns.example.com.
+SECTION ADDITIONAL
+ns.example.com.		IN 	A	1.2.3.4
+ENTRY_END
+RANGE_END
+
+; ns.example.com.
+RANGE_BEGIN 0 100
+	ADDRESS 1.2.3.4
+ENTRY_BEGIN
+MATCH opcode qtype qname
+ADJUST copy_id
+REPLY QR NOERROR
+SECTION QUESTION
+example.com. IN NS
+SECTION ANSWER
+example.com.    IN NS   ns.example.com.
+example.com.    3600    IN      RRSIG   NS 3 2 3600 20070926134150 20070829134150 2854 example.com. MC0CFQCN+qHdJxoI/2tNKwsb08pra/G7aAIUAWA5sDdJTbrXA1/3OaesGBAO3sI= ;{id = 2854}
+SECTION ADDITIONAL
+ns.example.com.         IN      A       1.2.3.4
+ns.example.com. 3600    IN      RRSIG   A 3 3 3600 20070926135752 20070829135752 2854 example.com. MC0CFQCMSWxVehgOQLoYclB9PIAbNP229AIUeH0vNNGJhjnZiqgIOKvs1EhzqAo= ;{id = 2854}
+ENTRY_END
+
+; response to DNSKEY priming query
+ENTRY_BEGIN
+MATCH opcode qtype qname
+ADJUST copy_id
+REPLY QR NOERROR
+SECTION QUESTION
+example.com. IN DNSKEY
+SECTION ANSWER
+example.com.    3600    IN      DNSKEY  256 3 3 ALXLUsWqUrY3JYER3T4TBJII s70j+sDS/UT2QRp61SE7S3E EXopNXoFE73JLRmvpi/UrOO/Vz4Se 6wXv/CYCKjGw06U4WRgR YXcpEhJROyNapmdIKSx hOzfLVE1gqA0PweZR8d tY3aNQSRn3sPpwJr6Mi /PqQKAMMrZ9ckJpf1+b QMOOvxgzz2U1GS18b3y ZKcgTMEaJzd/GZYzi/B N2DzQ0MsrSwYXfsNLFO Bbs8PJMW4LYIxeeOe6rUgkWOF 7CC9Dh/dduQ1QrsJhmZAEFfd6ByYV+ ;{id = 2854 (zsk), size = 1688b}
+example.com.    3600    IN      RRSIG   DNSKEY 3 2 3600 20070926134802 20070829134802 2854 example.com. MCwCFG1yhRNtTEa3Eno2zhVVuy2EJX3wAhQeLyUp6+UXcpC5qGNu9tkrTEgPUg== ;{id = 2854}
+SECTION AUTHORITY
+example.com.	IN NS	ns.example.com.
+example.com.    3600    IN      RRSIG   NS 3 2 3600 20070926134150 20070829134150 2854 example.com. MC0CFQCN+qHdJxoI/2tNKwsb08pra/G7aAIUAWA5sDdJTbrXA1/3OaesGBAO3sI= ;{id = 2854}
+SECTION ADDITIONAL
+ns.example.com.		IN 	A	1.2.3.4
+ns.example.com. 3600    IN      RRSIG   A 3 3 3600 20070926135752 20070829135752 2854 example.com. MC0CFQCMSWxVehgOQLoYclB9PIAbNP229AIUeH0vNNGJhjnZiqgIOKvs1EhzqAo= ;{id = 2854}
+ENTRY_END
+
+; response with NODATA
+ENTRY_BEGIN
+MATCH opcode qtype qname
+ADJUST copy_id
+REPLY QR NOERROR
+SECTION QUESTION
+example.com. IN LOC
+SECTION AUTHORITY
+example.com.    86400   IN      SOA     open.example.com. hostmaster.example.com. 2007090400 28800 7200 604800 18000
+example.com.    86400   IN      RRSIG   SOA 3 2 86400 20070926134150 20070829134150 2854 example.com. MC0CFQCSs8KJepwaIp5vu++/0hk04lkXvgIUdphJSAE/MYob30WcRei9/nL49tE= ;{id = 2854}
+example.com.    18000   IN      NSEC    _sip._udp.example.com. A NS SOA MX TXT AAAA NAPTR RRSIG NSEC DNSKEY 
+example.com.    18000   IN      RRSIG   NSEC 3 2 18000 20070926134150 20070829134150 2854 example.com. MCwCFBzOGtpgq4uJ2jeuLPYl2HowIRzDAhQVXNz1haQ1mI7z9lt5gcvWW+lFhA== ;{id = 2854}
+ENTRY_END
+
+; response to query of interest
+ENTRY_BEGIN
+MATCH opcode qtype qname
+ADJUST copy_id
+REPLY QR NOERROR
+SECTION QUESTION
+example.com. IN ANY
+SECTION ANSWER
+example.com.    86400   IN      SOA     open.example.com. hostmaster.example.com. 2007090400 28800 7200 604800 18000
+example.com.    86400   IN      RRSIG   SOA 3 2 86400 20070926134150 20070829134150 2854 example.com. MC0CFQCSs8KJepwaIp5vu++/0hk04lkXvgIUdphJSAE/MYob30WcRei9/nL49tE= ;{id = 2854}
+example.com.    3600    IN      DNSKEY  256 3 3 ALXLUsWqUrY3JYER3T4TBJIIs70j+sDS/UT2QRp61SE7S3EEXopNXoFE73JLRmvpi/UrOO/Vz4Se6wXv/CYCKjGw06U4WRgRYXcpEhJROyNapmdIKSxhOzfLVE1gqA0PweZR8dtY3aNQSRn3sPpwJr6Mi/PqQKAMMrZ9ckJpf1+bQMOOvxgzz2U1GS18b3yZKcgTMEaJzd/GZYzi/BN2DzQ0MsrSwYXfsNLFOBbs8PJMW4LYIxeeOe6rUgkWOF7CC9Dh/dduQ1QrsJhmZAEFfd6ByYV+ ;{id = 2854 (zsk), size = 1688b}
+example.com.    3600    IN      RRSIG   DNSKEY 3 2 3600 20070926134150 20070829134150 2854 example.com. MCwCFHq7BNVAeLW+Uw/rkjVS08lrMDk/AhR+bvChHfiE4jLb6uoyE54/irCuqA== ;{id = 2854}
+example.com.    600     IN      NAPTR   20 0 "s" "SIP+D2U" "" _sip._udp.example.com.
+example.com.    600     IN      RRSIG   NAPTR 3 2 600 20070926134150 20070829134150 2854 example.com. MC0CFE8qs66bzuOyKmTIacamrmqabMRzAhUAn0MujX1LB0UpTHuLMgdgMgJJlq4= ;{id = 2854}
+example.com.    86400   IN      AAAA    2001:7b8:206:1::1
+example.com.    86400   IN      RRSIG   AAAA 3 2 86400 20070926134150 20070829134150 2854 example.com. MC0CFEqS4WHyqhUkv7t42TsBZJk/Q9paAhUAtTZ8GaXGpot0PmsM0oGzQU+2iw4= ;{id = 2854}
+example.com.    86400   IN      TXT     "Stichting NLnet Labs"
+example.com.    86400   IN      RRSIG   TXT 3 2 86400 20070926134150 20070829134150 2854 example.com. MCwCFH3otn2u8zXczBS8L0VKpyAYZGSkAhQLGaQclkzMAzlB5j73opFjdkh8TA== ;{id = 2854}
+example.com.    86400   IN      MX      100 v.net.example.
+example.com.    86400   IN      MX      50 open.example.com.
+example.com.    86400   IN      RRSIG   MX 3 2 86400 20070926134150 20070829134150 2854 example.com. MCwCFEKh3jeqh69zcOqWWv3GNKlMECPyAhR9HJkcPLqlyVWUccWDFJfGGcQfdg== ;{id = 2854}
+example.com.    86400   IN      NS      v.net.example.
+example.com.    86400   IN      NS      open.example.com.
+example.com.    86400   IN      NS      ns7.domain-registry.example.
+example.com.    86400   IN      RRSIG   NS 3 2 86400 20070926134150 20070829134150 2854 example.com. MC0CFQCaRn30X4neKW7KYoTa2kcsoOLgfgIURvKEyDczLypWlx99KpxzMxRYhEc= ;{id = 2854}
+example.com.    86400   IN      A       213.154.224.1
+example.com.    86400   IN      RRSIG   A 3 2 86400 20070926134150 20070829134150 2854 example.com. MCwCFH8kSLxmRTwzlGDxvF1e4y/gM+5dAhQkzyQ2a6Gf+CMaHzVScaUvTt9HhQ== ;{id = 2854}
+example.com.    18000   IN      NSEC    _sip._udp.example.com. A NS SOA MX TXT AAAA NAPTR RRSIG NSEC DNSKEY 
+example.com.    18000   IN      RRSIG   NSEC 3 2 18000 20070926134150 20070829134150 2854 example.com. MCwCFBzOGtpgq4uJ2jeuLPYl2HowIRzDAhQVXNz1haQ1mI7z9lt5gcvWW+lFhA== ;{id = 2854}
+SECTION AUTHORITY
+SECTION ADDITIONAL
+ns7.domain-registry.example. 80173   IN      A       62.4.86.230
+open.example.com.      600     IN      A       213.154.224.1
+open.example.com.      600     IN      AAAA    2001:7b8:206:1::53
+open.example.com.      600     IN      AAAA    2001:7b8:206:1::1
+v.net.example.        28800   IN      A       213.154.224.17
+v.net.example.        28800   IN      AAAA    2001:7b8:206:1:200:39ff:fe59:b187
+johnny.example.com.    600     IN      A       213.154.224.44
+open.example.com.       600     IN      RRSIG   A 3 3 600 20070926134150 20070829134150 2854 example.com. MC0CFQCh8bja923UJmg1+sYXMK8WIE4dpgIUQe9sZa0GOcUYSgb2rXoogF8af+Y= ;{id = 2854}
+open.example.com.       600     IN      RRSIG   AAAA 3 3 600 20070926134150 20070829134150 2854 example.com. MC0CFQCRGJgIS6kEVG7aJfovuG/q3cgOWwIUYEIFCnfRQlMIYWF7BKMQoMbdkE0= ;{id = 2854}
+johnny.example.com.     600     IN      RRSIG   A 3 3 600 20070926134150 20070829134150 2854 example.com. MCwCFAh0/zSpCd/9eMNz7AyfnuGQFD1ZAhQEpNFNw4XByNEcbi/vsVeii9kp7g== ;{id = 2854}
+_sip._udp.example.com.  600     IN      RRSIG   SRV 3 4 600 20070926134150 20070829134150 2854 example.com. MCwCFFSRVgOcq1ihVuO6MhCuzWs6SxpVAhRPHHCKy0JxymVkYeFOxTkbVSWMMw== ;{id = 2854}
+_sip._udp.example.com. 600     IN      SRV     0 0 5060 johnny.example.com.
+ENTRY_END
+RANGE_END
+
+STEP 1 QUERY
+ENTRY_BEGIN
+MATCH TCP
+REPLY RD DO
+SECTION QUESTION
+example.com. IN LOC
+ENTRY_END
+
+STEP 10 CHECK_ANSWER
+ENTRY_BEGIN
+MATCH all
+REPLY QR RD RA AD DO NOERROR
+SECTION QUESTION
+example.com. IN LOC
+SECTION ANSWER
+SECTION AUTHORITY
+example.com.    86400   IN      SOA     open.example.com. hostmaster.example.com. 2007090400 28800 7200 604800 18000
+example.com.    86400   IN      RRSIG   SOA 3 2 86400 20070926134150 20070829134150 2854 example.com. MC0CFQCSs8KJepwaIp5vu++/0hk04lkXvgIUdphJSAE/MYob30WcRei9/nL49tE= ;{id = 2854}
+example.com.    18000   IN      NSEC    _sip._udp.example.com. A NS SOA MX TXT AAAA NAPTR RRSIG NSEC DNSKEY 
+example.com.    18000   IN      RRSIG   NSEC 3 2 18000 20070926134150 20070829134150 2854 example.com. MCwCFBzOGtpgq4uJ2jeuLPYl2HowIRzDAhQVXNz1haQ1mI7z9lt5gcvWW+lFhA== ;{id = 2854}
+ENTRY_END
+
+STEP 20 QUERY
+ENTRY_BEGIN
+MATCH TCP
+REPLY RD DO
+SECTION QUESTION
+example.com. IN ANY
+ENTRY_END
+
+; recursion happens here.
+STEP 30 CHECK_ANSWER
+ENTRY_BEGIN
+MATCH all
+REPLY QR RD RA AD DO NOERROR
+SECTION QUESTION
+example.com. IN ANY
+SECTION ANSWER
+example.com.    86400   IN      SOA     open.example.com. hostmaster.example.com. 2007090400 28800 7200 604800 18000
+example.com.    86400   IN      RRSIG   SOA 3 2 86400 20070926134150 20070829134150 2854 example.com. MC0CFQCSs8KJepwaIp5vu++/0hk04lkXvgIUdphJSAE/MYob30WcRei9/nL49tE= ;{id = 2854}
+example.com.    3600    IN      DNSKEY  256 3 3 ALXLUsWqUrY3JYER3T4TBJIIs70j+sDS/UT2QRp61SE7S3EEXopNXoFE73JLRmvpi/UrOO/Vz4Se6wXv/CYCKjGw06U4WRgRYXcpEhJROyNapmdIKSxhOzfLVE1gqA0PweZR8dtY3aNQSRn3sPpwJr6Mi/PqQKAMMrZ9ckJpf1+bQMOOvxgzz2U1GS18b3yZKcgTMEaJzd/GZYzi/BN2DzQ0MsrSwYXfsNLFOBbs8PJMW4LYIxeeOe6rUgkWOF7CC9Dh/dduQ1QrsJhmZAEFfd6ByYV+ ;{id = 2854 (zsk), size = 1688b}
+example.com.    3600    IN      RRSIG   DNSKEY 3 2 3600 20070926134150 20070829134150 2854 example.com. MCwCFHq7BNVAeLW+Uw/rkjVS08lrMDk/AhR+bvChHfiE4jLb6uoyE54/irCuqA== ;{id = 2854}
+example.com.    600     IN      NAPTR   20 0 "s" "SIP+D2U" "" _sip._udp.example.com.
+example.com.    600     IN      RRSIG   NAPTR 3 2 600 20070926134150 20070829134150 2854 example.com. MC0CFE8qs66bzuOyKmTIacamrmqabMRzAhUAn0MujX1LB0UpTHuLMgdgMgJJlq4= ;{id = 2854}
+example.com.    86400   IN      AAAA    2001:7b8:206:1::1
+example.com.    86400   IN      RRSIG   AAAA 3 2 86400 20070926134150 20070829134150 2854 example.com. MC0CFEqS4WHyqhUkv7t42TsBZJk/Q9paAhUAtTZ8GaXGpot0PmsM0oGzQU+2iw4= ;{id = 2854}
+example.com.    86400   IN      TXT     "Stichting NLnet Labs"
+example.com.    86400   IN      RRSIG   TXT 3 2 86400 20070926134150 20070829134150 2854 example.com. MCwCFH3otn2u8zXczBS8L0VKpyAYZGSkAhQLGaQclkzMAzlB5j73opFjdkh8TA== ;{id = 2854}
+example.com.    86400   IN      MX      100 v.net.example.
+example.com.    86400   IN      MX      50 open.example.com.
+example.com.    86400   IN      RRSIG   MX 3 2 86400 20070926134150 20070829134150 2854 example.com. MCwCFEKh3jeqh69zcOqWWv3GNKlMECPyAhR9HJkcPLqlyVWUccWDFJfGGcQfdg== ;{id = 2854}
+example.com.    86400   IN      NS      v.net.example.
+example.com.    86400   IN      NS      open.example.com.
+example.com.    86400   IN      NS      ns7.domain-registry.example.
+example.com.    86400   IN      RRSIG   NS 3 2 86400 20070926134150 20070829134150 2854 example.com. MC0CFQCaRn30X4neKW7KYoTa2kcsoOLgfgIURvKEyDczLypWlx99KpxzMxRYhEc= ;{id = 2854}
+example.com.    86400   IN      A       213.154.224.1
+example.com.    86400   IN      RRSIG   A 3 2 86400 20070926134150 20070829134150 2854 example.com. MCwCFH8kSLxmRTwzlGDxvF1e4y/gM+5dAhQkzyQ2a6Gf+CMaHzVScaUvTt9HhQ== ;{id = 2854}
+example.com.    18000   IN      NSEC    _sip._udp.example.com. A NS SOA MX TXT AAAA NAPTR RRSIG NSEC DNSKEY 
+example.com.    18000   IN      RRSIG   NSEC 3 2 18000 20070926134150 20070829134150 2854 example.com. MCwCFBzOGtpgq4uJ2jeuLPYl2HowIRzDAhQVXNz1haQ1mI7z9lt5gcvWW+lFhA== ;{id = 2854}
+SECTION AUTHORITY
+SECTION ADDITIONAL
+open.example.com.      600     IN      A       213.154.224.1
+open.example.com.      600     IN      AAAA    2001:7b8:206:1::53
+open.example.com.      600     IN      AAAA    2001:7b8:206:1::1
+open.example.com.       600     IN      RRSIG   A 3 3 600 20070926134150 20070829134150 2854 example.com. MC0CFQCh8bja923UJmg1+sYXMK8WIE4dpgIUQe9sZa0GOcUYSgb2rXoogF8af+Y= ;{id = 2854}
+open.example.com.       600     IN      RRSIG   AAAA 3 3 600 20070926134150 20070829134150 2854 example.com. MC0CFQCRGJgIS6kEVG7aJfovuG/q3cgOWwIUYEIFCnfRQlMIYWF7BKMQoMbdkE0= ;{id = 2854}
+ENTRY_END
+
+SCENARIO_END
diff --git a/contrib/unbound/util/config_file.c b/contrib/unbound/util/config_file.c
index d0b9904e133d..71c6d245794f 100644
--- a/contrib/unbound/util/config_file.c
+++ b/contrib/unbound/util/config_file.c
@@ -4,22 +4,22 @@
  * Copyright (c) 2007, NLnet Labs. All rights reserved.
  *
  * This software is open source.
- * 
+ *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
- * 
+ *
  * Redistributions of source code must retain the above copyright notice,
  * this list of conditions and the following disclaimer.
- * 
+ *
  * Redistributions in binary form must reproduce the above copyright notice,
  * this list of conditions and the following disclaimer in the documentation
  * and/or other materials provided with the distribution.
- * 
+ *
  * Neither the name of the NLNET LABS nor the names of its contributors may
  * be used to endorse or promote products derived from this software without
  * specific prior written permission.
- * 
+ *
  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
@@ -55,6 +55,7 @@
 #include "util/regional.h"
 #include "util/fptr_wlist.h"
 #include "util/data/dname.h"
+#include "util/random.h"
 #include "util/rtt.h"
 #include "services/cache/infra.h"
 #include "sldns/wire2str.h"
@@ -87,7 +88,10 @@ struct config_parser_state* cfg_parser = 0;
 /** init ports possible for use */
 static void init_outgoing_availports(int* array, int num);
 
-struct config_file* 
+/** init cookie with random data */
+static void init_cookie_secret(uint8_t* cookie_secret, size_t cookie_secret_len);
+
+struct config_file*
 config_create(void)
 {
 	struct config_file* cfg;
@@ -116,6 +120,7 @@ config_create(void)
 	cfg->tcp_auth_query_timeout = 3 * 1000; /* 3s in millisecs */
 	cfg->do_tcp_keepalive = 0;
 	cfg->tcp_keepalive_timeout = 120 * 1000; /* 120s in millisecs */
+	cfg->sock_queue_timeout = 0; /* do not check timeout */
 	cfg->ssl_service_key = NULL;
 	cfg->ssl_service_pem = NULL;
 	cfg->ssl_port = UNBOUND_DNS_OVER_TLS_PORT;
@@ -153,7 +158,7 @@ config_create(void)
 	cfg->outgoing_num_ports = 48; /* windows is limited in num fds */
 	cfg->num_queries_per_thread = 24;
 	cfg->outgoing_num_tcp = 2; /* leaves 64-52=12 for: 4if,1stop,thread4 */
-	cfg->incoming_num_tcp = 2; 
+	cfg->incoming_num_tcp = 2;
 #endif
 	cfg->stream_wait_size = 4 * 1024 * 1024;
 	cfg->edns_buffer_size = 1232; /* from DNS flagday recommendation */
@@ -233,6 +238,7 @@ config_create(void)
 	cfg->harden_below_nxdomain = 1;
 	cfg->harden_referral_path = 0;
 	cfg->harden_algo_downgrade = 0;
+	cfg->harden_unknown_additional = 0;
 	cfg->use_caps_bits_for_id = 0;
 	cfg->caps_whitelist = NULL;
 	cfg->private_address = NULL;
@@ -300,14 +306,14 @@ config_create(void)
 	cfg->minimal_responses = 1;
 	cfg->rrset_roundrobin = 1;
 	cfg->unknown_server_time_limit = 376;
-	cfg->max_udp_size = 4096;
-	if(!(cfg->server_key_file = strdup(RUN_DIR"/unbound_server.key"))) 
+	cfg->max_udp_size = 1232; /* value taken from edns_buffer_size */
+	if(!(cfg->server_key_file = strdup(RUN_DIR"/unbound_server.key")))
 		goto error_exit;
-	if(!(cfg->server_cert_file = strdup(RUN_DIR"/unbound_server.pem"))) 
+	if(!(cfg->server_cert_file = strdup(RUN_DIR"/unbound_server.pem")))
 		goto error_exit;
-	if(!(cfg->control_key_file = strdup(RUN_DIR"/unbound_control.key"))) 
+	if(!(cfg->control_key_file = strdup(RUN_DIR"/unbound_control.key")))
 		goto error_exit;
-	if(!(cfg->control_cert_file = strdup(RUN_DIR"/unbound_control.pem"))) 
+	if(!(cfg->control_cert_file = strdup(RUN_DIR"/unbound_control.pem")))
 		goto error_exit;
 
 #ifdef CLIENT_SUBNET
@@ -315,7 +321,7 @@ config_create(void)
 #else
 	if(!(cfg->module_conf = strdup("validator iterator"))) goto error_exit;
 #endif
-	if(!(cfg->val_nsec3_key_iterations = 
+	if(!(cfg->val_nsec3_key_iterations =
 		strdup("1024 150 2048 150 4096 150"))) goto error_exit;
 #if defined(DNSTAP_SOCKET_PATH)
 	if(!(cfg->dnstap_socket_path = strdup(DNSTAP_SOCKET_PATH)))
@@ -324,6 +330,7 @@ config_create(void)
 	cfg->dnstap_bidirectional = 1;
 	cfg->dnstap_tls = 1;
 	cfg->disable_dnssec_lame_check = 0;
+	cfg->ip_ratelimit_cookie = 0;
 	cfg->ip_ratelimit = 0;
 	cfg->ratelimit = 0;
 	cfg->ip_ratelimit_slabs = 4;
@@ -367,11 +374,17 @@ config_create(void)
 	cfg->ipsecmod_whitelist = NULL;
 	cfg->ipsecmod_strict = 0;
 #endif
+	cfg->do_answer_cookie = 0;
+	memset(cfg->cookie_secret, 0, sizeof(cfg->cookie_secret));
+	cfg->cookie_secret_len = 16;
+	init_cookie_secret(cfg->cookie_secret, cfg->cookie_secret_len);
 #ifdef USE_CACHEDB
 	if(!(cfg->cachedb_backend = strdup("testframe"))) goto error_exit;
 	if(!(cfg->cachedb_secret = strdup("default"))) goto error_exit;
 #ifdef USE_REDIS
 	if(!(cfg->redis_server_host = strdup("127.0.0.1"))) goto error_exit;
+	cfg->redis_server_path = NULL;
+	cfg->redis_server_password = NULL;
 	cfg->redis_timeout = 100;
 	cfg->redis_server_port = 6379;
 	cfg->redis_expire_records = 0;
@@ -487,10 +500,10 @@ int config_set_option(struct config_file* cfg, const char* opt,
 		/* not supported, library must have 1 thread in bgworker */
 		return 0;
 	} else if(strcmp(opt, "outgoing-port-permit:") == 0) {
-		return cfg_mark_ports(val, 1, 
+		return cfg_mark_ports(val, 1,
 			cfg->outgoing_avail_ports, 65536);
 	} else if(strcmp(opt, "outgoing-port-avoid:") == 0) {
-		return cfg_mark_ports(val, 0, 
+		return cfg_mark_ports(val, 0,
 			cfg->outgoing_avail_ports, 65536);
 	} else if(strcmp(opt, "local-zone:") == 0) {
 		return cfg_parse_local_zone(cfg, val);
@@ -504,7 +517,7 @@ int config_set_option(struct config_file* cfg, const char* opt,
 			if(atoi(val) == 0) return 0;
 			cfg->val_date_override = (uint32_t)atoi(val);
 		}
-	} else if(strcmp(opt, "local-data-ptr:") == 0) { 
+	} else if(strcmp(opt, "local-data-ptr:") == 0) {
 		char* ptr = cfg_ptr_reverse((char*)opt);
 		return cfg_strlist_insert(&cfg->local_data, ptr);
 	} else if(strcmp(opt, "logfile:") == 0) {
@@ -540,6 +553,7 @@ int config_set_option(struct config_file* cfg, const char* opt,
 	else S_NUMBER_NONZERO("tcp-reuse-timeout:", tcp_reuse_timeout)
 	else S_YNO("edns-tcp-keepalive:", do_tcp_keepalive)
 	else S_NUMBER_NONZERO("edns-tcp-keepalive-timeout:", tcp_keepalive_timeout)
+	else S_NUMBER_OR_ZERO("sock-queue-timeout:", sock_queue_timeout)
 	else S_YNO("ssl-upstream:", ssl_upstream)
 	else S_YNO("tls-upstream:", ssl_upstream)
 	else S_STR("ssl-service-key:", ssl_service_key)
@@ -649,6 +663,7 @@ int config_set_option(struct config_file* cfg, const char* opt,
 	else S_YNO("harden-below-nxdomain:", harden_below_nxdomain)
 	else S_YNO("harden-referral-path:", harden_referral_path)
 	else S_YNO("harden-algo-downgrade:", harden_algo_downgrade)
+	else S_YNO("harden-unknown-additional:", harden_unknown_additional)
 	else S_YNO("use-caps-for-id:", use_caps_bits_for_id)
 	else S_STRLIST("caps-whitelist:", caps_whitelist)
 	else S_SIZET_OR_ZERO("unwanted-reply-threshold:", unwanted_threshold)
@@ -684,7 +699,7 @@ int config_set_option(struct config_file* cfg, const char* opt,
 	else if(strcmp(opt, "serve-expired-reply-ttl:") == 0)
 	{ IS_NUMBER_OR_ZERO; cfg->serve_expired_reply_ttl = atoi(val); SERVE_EXPIRED_REPLY_TTL=(time_t)cfg->serve_expired_reply_ttl;}
 	else S_NUMBER_OR_ZERO("serve-expired-client-timeout:", serve_expired_client_timeout)
-	else S_YNO("ede:", ede)	
+	else S_YNO("ede:", ede)
 	else S_YNO("ede-serve-expired:", ede_serve_expired)
 	else S_YNO("serve-original-ttl:", serve_original_ttl)
 	else S_STR("val-nsec3-keysize-iterations:", val_nsec3_key_iterations)
@@ -765,6 +780,10 @@ int config_set_option(struct config_file* cfg, const char* opt,
 	else S_POW2("dnscrypt-nonce-cache-slabs:",
 		dnscrypt_nonce_cache_slabs)
 #endif
+	else if(strcmp(opt, "ip-ratelimit-cookie:") == 0) {
+	    IS_NUMBER_OR_ZERO; cfg->ip_ratelimit_cookie = atoi(val);
+	    infra_ip_ratelimit_cookie=cfg->ip_ratelimit_cookie;
+	}
 	else if(strcmp(opt, "ip-ratelimit:") == 0) {
 	    IS_NUMBER_OR_ZERO; cfg->ip_ratelimit = atoi(val);
 	    infra_ip_ratelimit=cfg->ip_ratelimit;
@@ -812,7 +831,7 @@ int config_set_option(struct config_file* cfg, const char* opt,
 	{ IS_NUMBER_OR_ZERO; cfg->val_max_restart = (int32_t)atoi(val); }
 	else if (strcmp(opt, "outgoing-interface:") == 0) {
 		char* d = strdup(val);
-		char** oi = 
+		char** oi =
 		(char**)reallocarray(NULL, (size_t)cfg->num_out_ifs+1, sizeof(char*));
 		if(!d || !oi) { free(d); free(oi); return -1; }
 		if(cfg->out_ifs && cfg->num_out_ifs) {
@@ -907,7 +926,7 @@ config_collate_cat(struct config_strlist* list)
 	for(s=list; s; s=s->next)
 		total += strlen(s->str) + 1; /* len + newline */
 	left = total+1; /* one extra for nul at end */
-	r = malloc(left); 
+	r = malloc(left);
 	if(!r)
 		return NULL;
 	w = r;
@@ -986,7 +1005,7 @@ config_collate_cat(struct config_strlist* list)
 	}
 
 int
-config_get_option(struct config_file* cfg, const char* opt, 
+config_get_option(struct config_file* cfg, const char* opt,
 	void (*func)(char*,void*), void* arg)
 {
 	char buf[1024], nopt[64];
@@ -1062,6 +1081,7 @@ config_get_option(struct config_file* cfg, const char* opt,
 	else O_DEC(opt, "tcp-reuse-timeout", tcp_reuse_timeout)
 	else O_YNO(opt, "edns-tcp-keepalive", do_tcp_keepalive)
 	else O_DEC(opt, "edns-tcp-keepalive-timeout", tcp_keepalive_timeout)
+	else O_DEC(opt, "sock-queue-timeout", sock_queue_timeout)
 	else O_YNO(opt, "ssl-upstream", ssl_upstream)
 	else O_YNO(opt, "tls-upstream", ssl_upstream)
 	else O_STR(opt, "ssl-service-key", ssl_service_key)
@@ -1117,6 +1137,7 @@ config_get_option(struct config_file* cfg, const char* opt,
 	else O_YNO(opt, "harden-below-nxdomain", harden_below_nxdomain)
 	else O_YNO(opt, "harden-referral-path", harden_referral_path)
 	else O_YNO(opt, "harden-algo-downgrade", harden_algo_downgrade)
+	else O_YNO(opt, "harden-unknown-additional", harden_unknown_additional)
 	else O_YNO(opt, "use-caps-for-id", use_caps_bits_for_id)
 	else O_LST(opt, "caps-whitelist", caps_whitelist)
 	else O_DEC(opt, "unwanted-reply-threshold", unwanted_threshold)
@@ -1232,6 +1253,7 @@ config_get_option(struct config_file* cfg, const char* opt,
 	else O_LST(opt, "python-script", python_script)
 	else O_LST(opt, "dynlib-file", dynlib_file)
 	else O_YNO(opt, "disable-dnssec-lame-check", disable_dnssec_lame_check)
+	else O_DEC(opt, "ip-ratelimit-cookie", ip_ratelimit_cookie)
 	else O_DEC(opt, "ip-ratelimit", ip_ratelimit)
 	else O_DEC(opt, "ratelimit", ratelimit)
 	else O_MEM(opt, "ip-ratelimit-size", ip_ratelimit_size)
@@ -1287,6 +1309,8 @@ config_get_option(struct config_file* cfg, const char* opt,
 #ifdef USE_REDIS
 	else O_STR(opt, "redis-server-host", redis_server_host)
 	else O_DEC(opt, "redis-server-port", redis_server_port)
+	else O_STR(opt, "redis-server-path", redis_server_path)
+	else O_STR(opt, "redis-server-password", redis_server_password)
 	else O_DEC(opt, "redis-timeout", redis_timeout)
 	else O_YNO(opt, "redis-expire-records", redis_expire_records)
 #endif  /* USE_REDIS */
@@ -1322,7 +1346,7 @@ create_cfg_parser(struct config_file* cfg, char* filename, const char* chroot)
 	init_cfg_parse();
 }
 
-int 
+int
 config_read(struct config_file* cfg, const char* filename, const char* chroot)
 {
 	FILE *in;
@@ -1362,7 +1386,7 @@ config_read(struct config_file* cfg, const char* filename, const char* chroot)
 			if(r == GLOB_NOMATCH) {
 				verbose(VERB_QUERY, "include: "
 				"no matches for %s", fname);
-				return 1; 
+				return 1;
 			} else if(r == GLOB_NOSPACE) {
 				log_err("include: %s: "
 					"fnametern out of memory", fname);
@@ -1561,7 +1585,7 @@ config_del_strbytelist(struct config_strbytelist* p)
 	}
 }
 
-void 
+void
 config_delete(struct config_file* cfg)
 {
 	if(!cfg) return;
@@ -1638,6 +1662,7 @@ config_delete(struct config_file* cfg)
 	free(cfg->server_cert_file);
 	free(cfg->control_key_file);
 	free(cfg->control_cert_file);
+	free(cfg->nat64_prefix);
 	free(cfg->dns64_prefix);
 	config_delstrlist(cfg->dns64_ignore_aaaa);
 	free(cfg->dnstap_socket_path);
@@ -1663,6 +1688,8 @@ config_delete(struct config_file* cfg)
 	free(cfg->cachedb_secret);
 #ifdef USE_REDIS
 	free(cfg->redis_server_host);
+	free(cfg->redis_server_path);
+	free(cfg->redis_server_password);
 #endif  /* USE_REDIS */
 #endif  /* USE_CACHEDB */
 #ifdef USE_IPSET
@@ -1672,7 +1699,21 @@ config_delete(struct config_file* cfg)
 	free(cfg);
 }
 
-static void 
+static void
+init_cookie_secret(uint8_t* cookie_secret, size_t cookie_secret_len)
+{
+	struct ub_randstate *rand = ub_initstate(NULL);
+
+	if (!rand)
+		fatal_exit("could not init random generator");
+	while (cookie_secret_len) {
+		*cookie_secret++ = (uint8_t)ub_random(rand);
+		cookie_secret_len--;
+	}
+	ub_randfree(rand);
+}
+
+static void
 init_outgoing_availports(int* a, int num)
 {
 	/* generated with make iana_update */
@@ -1685,7 +1726,7 @@ init_outgoing_availports(int* a, int num)
 	for(i=1024; i<num; i++) {
 		a[i] = i;
 	}
-	/* create empty spot at 49152 to keep ephemeral ports available 
+	/* create empty spot at 49152 to keep ephemeral ports available
 	 * to other programs */
 	for(i=49152; i<49152+256; i++)
 		a[i] = 0;
@@ -1696,7 +1737,7 @@ init_outgoing_availports(int* a, int num)
 	}
 }
 
-int 
+int
 cfg_mark_ports(const char* str, int allow, int* avail, int num)
 {
 	char* mid = strchr(str, '-');
@@ -1741,7 +1782,7 @@ cfg_mark_ports(const char* str, int allow, int* avail, int num)
 	return 1;
 }
 
-int 
+int
 cfg_scan_ports(int* avail, int num)
 {
 	int i;
@@ -1858,7 +1899,7 @@ int cfg_strlist_append(struct config_strlist_head* list, char* item)
 	return 1;
 }
 
-int 
+int
 cfg_region_strlist_insert(struct regional* region,
 	struct config_strlist** head, char* item)
 {
@@ -1891,7 +1932,7 @@ cfg_strlist_find(struct config_strlist* head, const char *item)
 	return NULL;
 }
 
-int 
+int
 cfg_strlist_insert(struct config_strlist** head, char* item)
 {
 	struct config_strlist *s;
@@ -1921,7 +1962,7 @@ cfg_strlist_append_ex(struct config_strlist** head, char* item)
 		return 0;
 	s->str = item;
 	s->next = NULL;
-	
+
 	if (*head==NULL) {
 		*head = s;
 	} else {
@@ -1931,11 +1972,11 @@ cfg_strlist_append_ex(struct config_strlist** head, char* item)
 		}
 		last->next = s;
 	}
-	
-	return 1;  
+
+	return 1;
 }
 
-int 
+int
 cfg_str2list_insert(struct config_str2list** head, char* item, char* i2)
 {
 	struct config_str2list *s;
@@ -1957,7 +1998,7 @@ cfg_str2list_insert(struct config_str2list** head, char* item, char* i2)
 	return 1;
 }
 
-int 
+int
 cfg_str3list_insert(struct config_str3list** head, char* item, char* i2,
 	char* i3)
 {
@@ -1993,7 +2034,7 @@ cfg_strbytelist_insert(struct config_strbytelist** head, char* item,
 	return 1;
 }
 
-time_t 
+time_t
 cfg_convert_timeval(const char* str)
 {
 	time_t t;
@@ -2001,7 +2042,7 @@ cfg_convert_timeval(const char* str)
 	memset(&tm, 0, sizeof(tm));
 	if(strlen(str) < 14)
 		return 0;
-	if(sscanf(str, "%4d%2d%2d%2d%2d%2d", &tm.tm_year, &tm.tm_mon, 
+	if(sscanf(str, "%4d%2d%2d%2d%2d%2d", &tm.tm_year, &tm.tm_mon,
 		&tm.tm_mday, &tm.tm_hour, &tm.tm_min, &tm.tm_sec) != 6)
 		return 0;
 	tm.tm_year -= 1900;
@@ -2018,7 +2059,7 @@ cfg_convert_timeval(const char* str)
 	return t;
 }
 
-int 
+int
 cfg_count_numbers(const char* s)
 {
 	/* format ::= (sp num)+ sp  */
@@ -2053,7 +2094,7 @@ static int isalldigit(const char* str, size_t l)
 	return 1;
 }
 
-int 
+int
 cfg_parse_memsize(const char* str, size_t* res)
 {
 	size_t len;
@@ -2069,11 +2110,11 @@ cfg_parse_memsize(const char* str, size_t* res)
 	/* check appended num */
 	while(len>0 && str[len-1]==' ')
 		len--;
-	if(len > 1 && str[len-1] == 'b') 
+	if(len > 1 && str[len-1] == 'b')
 		len--;
-	else if(len > 1 && str[len-1] == 'B') 
+	else if(len > 1 && str[len-1] == 'B')
 		len--;
-	
+
 	if(len > 1 && tolower((unsigned char)str[len-1]) == 'g')
 		mult = 1024*1024*1024;
 	else if(len > 1 && tolower((unsigned char)str[len-1]) == 'm')
@@ -2160,7 +2201,7 @@ uint8_t* config_parse_taglist(struct config_file* cfg, char* str,
 		log_err("out of memory");
 		return 0;
 	}
-	
+
 	/* parse */
 	s = str;
 	while((p=strsep(&s, " \t\n")) != NULL) {
@@ -2246,7 +2287,7 @@ int taglist_intersect(uint8_t* list1, size_t list1len, const uint8_t* list2,
 	return 0;
 }
 
-void 
+void
 config_apply(struct config_file* config)
 {
 	MAX_TTL = (time_t)config->max_ttl;
@@ -2288,7 +2329,7 @@ void config_lookup_uid(struct config_file* cfg)
 #endif
 }
 
-/** 
+/**
  * Calculate string length of full pathname in original filesys
  * @param fname: the path name to convert.
  * 	Must not be null or empty.
@@ -2302,7 +2343,7 @@ strlen_after_chroot(const char* fname, struct config_file* cfg, int use_chdir)
 {
 	size_t len = 0;
 	int slashit = 0;
-	if(cfg->chrootdir && cfg->chrootdir[0] && 
+	if(cfg->chrootdir && cfg->chrootdir[0] &&
 		strncmp(cfg->chrootdir, fname, strlen(cfg->chrootdir)) == 0) {
 		/* already full pathname, return it */
 		return strlen(fname);
@@ -2325,8 +2366,8 @@ strlen_after_chroot(const char* fname, struct config_file* cfg, int use_chdir)
 		/* prepend chdir */
 		if(slashit && cfg->directory[0] != '/')
 			len++;
-		if(cfg->chrootdir && cfg->chrootdir[0] && 
-			strncmp(cfg->chrootdir, cfg->directory, 
+		if(cfg->chrootdir && cfg->chrootdir[0] &&
+			strncmp(cfg->chrootdir, cfg->directory,
 			strlen(cfg->chrootdir)) == 0)
 			len += strlen(cfg->directory)-strlen(cfg->chrootdir);
 		else	len += strlen(cfg->directory);
@@ -2349,7 +2390,7 @@ fname_after_chroot(const char* fname, struct config_file* cfg, int use_chdir)
 		return NULL;
 	buf[0] = 0;
 	/* is fname already in chroot ? */
-	if(cfg->chrootdir && cfg->chrootdir[0] && 
+	if(cfg->chrootdir && cfg->chrootdir[0] &&
 		strncmp(cfg->chrootdir, fname, strlen(cfg->chrootdir)) == 0) {
 		/* already full pathname, return it */
 		(void)strlcpy(buf, fname, len);
@@ -2375,10 +2416,10 @@ fname_after_chroot(const char* fname, struct config_file* cfg, int use_chdir)
 		if(slashit && cfg->directory[0] != '/')
 			(void)strlcat(buf, "/", len);
 		/* is the directory already in the chroot? */
-		if(cfg->chrootdir && cfg->chrootdir[0] && 
-			strncmp(cfg->chrootdir, cfg->directory, 
+		if(cfg->chrootdir && cfg->chrootdir[0] &&
+			strncmp(cfg->chrootdir, cfg->directory,
 			strlen(cfg->chrootdir)) == 0)
-			(void)strlcat(buf, cfg->directory+strlen(cfg->chrootdir), 
+			(void)strlcat(buf, cfg->directory+strlen(cfg->chrootdir),
 				   len);
 		else (void)strlcat(buf, cfg->directory, len);
 		slashit = 1;
@@ -2415,7 +2456,7 @@ static char* last_space_pos(const char* str)
 	return (sp>tab)?sp:tab;
 }
 
-int 
+int
 cfg_parse_local_zone(struct config_file* cfg, const char* val)
 {
 	const char *type, *name_end, *name;
@@ -2450,11 +2491,11 @@ cfg_parse_local_zone(struct config_file* cfg, const char* val)
 	}
 
 	if(strcmp(type, "nodefault")==0) {
-		return cfg_strlist_insert(&cfg->local_zones_nodefault, 
+		return cfg_strlist_insert(&cfg->local_zones_nodefault,
 			strdup(name));
 #ifdef USE_IPSET
 	} else if(strcmp(type, "ipset")==0) {
-		return cfg_strlist_insert(&cfg->local_zones_ipset, 
+		return cfg_strlist_insert(&cfg->local_zones_ipset,
 			strdup(name));
 #endif
 	} else {
@@ -2509,7 +2550,7 @@ char* cfg_ptr_reverse(char* str)
 		const char* hex = "0123456789abcdef";
 		char *p = buf;
 		int i;
-		memmove(ad, &((struct sockaddr_in6*)&addr)->sin6_addr, 
+		memmove(ad, &((struct sockaddr_in6*)&addr)->sin6_addr,
 			sizeof(ad));
 		for(i=15; i>=0; i--) {
 			uint8_t b = ad[i];
@@ -2521,7 +2562,7 @@ char* cfg_ptr_reverse(char* str)
 		snprintf(buf+16*4, sizeof(buf)-16*4, "ip6.arpa. ");
 	} else {
 		uint8_t ad[4];
-		memmove(ad, &((struct sockaddr_in*)&addr)->sin_addr, 
+		memmove(ad, &((struct sockaddr_in*)&addr)->sin_addr,
 			sizeof(ad));
 		snprintf(buf, sizeof(buf), "%u.%u.%u.%u.in-addr.arpa. ",
 			(unsigned)ad[3], (unsigned)ad[2],
diff --git a/contrib/unbound/util/config_file.h b/contrib/unbound/util/config_file.h
index 87cb92cf0e03..452f3c6a78fb 100644
--- a/contrib/unbound/util/config_file.h
+++ b/contrib/unbound/util/config_file.h
@@ -4,22 +4,22 @@
  * Copyright (c) 2007, NLnet Labs. All rights reserved.
  *
  * This software is open source.
- * 
+ *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
- * 
+ *
  * Redistributions of source code must retain the above copyright notice,
  * this list of conditions and the following disclaimer.
- * 
+ *
  * Redistributions in binary form must reproduce the above copyright notice,
  * this list of conditions and the following disclaimer in the documentation
  * and/or other materials provided with the distribution.
- * 
+ *
  * Neither the name of the NLNET LABS nor the names of its contributors may
  * be used to endorse or promote products derived from this software without
  * specific prior written permission.
- * 
+ *
  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
@@ -88,6 +88,8 @@ struct config_file {
 	int do_ip4;
 	/** do ip6 query support. */
 	int do_ip6;
+	/** do nat64 on queries */
+	int do_nat64;
 	/** prefer ip4 upstream queries. */
 	int prefer_ip4;
 	/** prefer ip6 upstream queries. */
@@ -116,6 +118,8 @@ struct config_file {
 	int do_tcp_keepalive;
 	/** tcp keepalive timeout, in msec */
 	int tcp_keepalive_timeout;
+	/** timeout of packets sitting in the socket queue */
+	int sock_queue_timeout;
 	/** proxy protocol ports */
 	struct config_strlist* proxy_protocol_port;
 
@@ -232,7 +236,7 @@ struct config_file {
 	/** interface description strings (IP addresses) */
 	char **ifs;
 
-	/** number of outgoing interfaces to open. 
+	/** number of outgoing interfaces to open.
 	 * If 0 default all interfaces. */
 	int num_out_ifs;
 	/** outgoing interface description strings (IP addresses) */
@@ -251,7 +255,7 @@ struct config_file {
 	/** list of donotquery addresses, linked list */
 	struct config_strlist* donotqueryaddrs;
 #ifdef CLIENT_SUBNET
-	/** list of servers we send edns-client-subnet option to and 
+	/** list of servers we send edns-client-subnet option to and
 	 * accept option from, linked list */
 	struct config_strlist* client_subnet;
 	/** list of zones we send edns-client-subnet option for */
@@ -292,6 +296,9 @@ struct config_file {
 	int harden_referral_path;
 	/** harden against algorithm downgrade */
 	int harden_algo_downgrade;
+	/** harden against unknown records in the authority section and in
+	 * the additional section */
+	int harden_unknown_additional;
 	/** use 0x20 bits in query as random ID bits */
 	int use_caps_bits_for_id;
 	/** 0x20 whitelist, domains that do not use capsforid */
@@ -364,7 +371,7 @@ struct config_file {
 
 	/** the module configuration string */
 	char* module_conf;
-	
+
 	/** files with trusted DS and DNSKEYs in zonefile format, list */
 	struct config_strlist* trust_anchor_file_list;
 	/** list of trustanchor keys, linked list */
@@ -389,7 +396,7 @@ struct config_file {
 	/** max number of query restarts, number of IPs to probe */
 	int32_t val_max_restart;
 	/** this value sets the number of seconds before revalidating bogus */
-	int bogus_ttl; 
+	int bogus_ttl;
 	/** should validator clean additional section for secure msgs */
 	int val_clean_additional;
 	/** log bogus messages by the validator */
@@ -535,6 +542,9 @@ struct config_file {
 	/** ignore AAAAs for these domain names and use A record anyway */
 	struct config_strlist* dns64_ignore_aaaa;
 
+	/* NAT64 prefix; if unset defaults to dns64_prefix */
+	char* nat64_prefix;
+
 	/** true to enable dnstap support */
 	int dnstap;
 	/** using bidirectional frame streams if true */
@@ -580,6 +590,9 @@ struct config_file {
 
 	/** ratelimit for ip addresses. 0 is off, otherwise qps (unless overridden) */
 	int ip_ratelimit;
+	/** ratelimit for ip addresses with a valid DNS Cookie. 0 is off,
+	 *  otherwise qps (unless overridden) */
+	int ip_ratelimit_cookie;
 	/** number of slabs for ip_ratelimit cache */
 	size_t ip_ratelimit_slabs;
 	/** memory size in bytes for ip_ratelimit cache */
@@ -691,12 +704,23 @@ struct config_file {
 	char* redis_server_host;
 	/** redis server's TCP port */
 	int redis_server_port;
+	/** redis server's unix path. Or "", NULL if unused */
+	char* redis_server_path;
+	/** redis server's AUTH password. Or "", NULL if unused */
+	char* redis_server_password;
 	/** timeout (in ms) for communication with the redis server */
 	int redis_timeout;
 	/** set timeout on redis records based on DNS response ttl */
 	int redis_expire_records;
 #endif
 #endif
+	/** Downstream DNS Cookies */
+	/** do answer with server cookie when request contained cookie option */
+	int do_answer_cookie;
+	/** cookie secret */
+	uint8_t cookie_secret[40];
+	/** cookie secret length */
+	size_t  cookie_secret_len;
 
 	/* ipset module */
 #ifdef USE_IPSET
@@ -809,7 +833,7 @@ struct config_view {
 	struct config_strlist* local_zones_ipset;
 #endif
 	/** Fallback to global local_zones when there is no match in the view
-	 * view specific tree. 1 for yes, 0 for no */	
+	 * view specific tree. 1 for yes, 0 for no */
 	int isfirst;
 	/** predefined actions for particular IP address responses */
 	struct config_str2list* respip_actions;
@@ -884,7 +908,7 @@ struct config_file* config_create_forlib(void);
  * @param config: where options are stored into, must be freshly created.
  * @param filename: name of configfile. If NULL nothing is done.
  * @param chroot: if not NULL, the chroot dir currently in use (for include).
- * @return: false on error. In that case errno is set, ENOENT means 
+ * @return: false on error. In that case errno is set, ENOENT means
  * 	file not found.
  */
 int config_read(struct config_file* config, const char* filename,
@@ -919,16 +943,16 @@ void config_lookup_uid(struct config_file* config);
 int config_set_option(struct config_file* config, const char* option,
 	const char* value);
 
-/** 
+/**
  * Call print routine for the given option.
  * @param cfg: config.
- * @param opt: option name without trailing :. 
+ * @param opt: option name without trailing :.
  *	This is different from config_set_option.
  * @param func: print func, called as (str, arg) for every data element.
  * @param arg: user argument for print func.
  * @return false if the option name is not supported (syntax error).
  */
-int config_get_option(struct config_file* cfg, const char* opt, 
+int config_get_option(struct config_file* cfg, const char* opt,
 	void (*func)(char*,void*), void* arg);
 
 /**
@@ -948,7 +972,7 @@ int config_get_option_list(struct config_file* cfg, const char* opt,
  * @param str: string. malloced, caller must free it.
  * @return 0=OK, 1=syntax error, 2=malloc failed.
  */
-int config_get_option_collate(struct config_file* cfg, const char* opt, 
+int config_get_option_collate(struct config_file* cfg, const char* opt,
 	char** str);
 
 /**
@@ -1143,7 +1167,7 @@ int cfg_count_numbers(const char* str);
  * k=1024, m=1024*1024, g=1024*1024*1024.
  * @param str: string
  * @param res: result is stored here, size in bytes.
- * @return: true if parsed correctly, or 0 on a parse error (and an error 
+ * @return: true if parsed correctly, or 0 on a parse error (and an error
  * is logged).
  */
 int cfg_parse_memsize(const char* str, size_t* res);
@@ -1177,7 +1201,7 @@ int find_tag_id(struct config_file* cfg, const char* tag);
 /**
  * parse taglist from string into bytestring with bitlist.
  * @param cfg: the config structure (with tagnames)
- * @param str: the string to parse.  Parse puts 0 bytes in string. 
+ * @param str: the string to parse.  Parse puts 0 bytes in string.
  * @param listlen: returns length of in bytes.
  * @return malloced bytes with a bitlist of the tags.  or NULL on parse error
  * or malloc failure.
@@ -1220,7 +1244,7 @@ int cfg_parse_local_zone(struct config_file* cfg, const char* val);
  * @param allow: give true if this range is permitted.
  * @param avail: the array from cfg.
  * @param num: size of the array (65536).
- * @return: true if parsed correctly, or 0 on a parse error (and an error 
+ * @return: true if parsed correctly, or 0 on a parse error (and an error
  * is logged).
  */
 int cfg_mark_ports(const char* str, int allow, int* avail, int num);
@@ -1248,7 +1272,7 @@ void cfg_apply_local_port_policy(struct config_file* cfg, int num);
  */
 int cfg_scan_ports(int* avail, int num);
 
-/** 
+/**
  * Convert a filename to full pathname in original filesys
  * @param fname: the path name to convert.
  *      Must not be null or empty.
@@ -1257,7 +1281,7 @@ int cfg_scan_ports(int* avail, int num);
  * @return pointer to malloced buffer which is: [chroot][chdir]fname
  *      or NULL on malloc failure.
  */
-char* fname_after_chroot(const char* fname, struct config_file* cfg, 
+char* fname_after_chroot(const char* fname, struct config_file* cfg,
 	int use_chdir);
 
 /**
@@ -1342,4 +1366,3 @@ int if_is_dnscrypt(const char* ifname, const char* port, int dnscrypt_port);
 #endif
 
 #endif /* UTIL_CONFIG_FILE_H */
-
diff --git a/contrib/unbound/util/configlexer.lex b/contrib/unbound/util/configlexer.lex
index 4fcb622e453e..5b0775ad1980 100644
--- a/contrib/unbound/util/configlexer.lex
+++ b/contrib/unbound/util/configlexer.lex
@@ -210,9 +210,9 @@ SQANY     [^\'\n\r\\]|\\.
 %x	quotedstring singlequotedstr include include_quoted val include_toplevel include_toplevel_quoted
 
 %%
-<INITIAL,val>{SPACE}*	{ 
+<INITIAL,val>{SPACE}*	{
 	LEXOUT(("SP ")); /* ignore */ }
-<INITIAL,val>{SPACE}*{COMMENT}.*	{ 
+<INITIAL,val>{SPACE}*{COMMENT}.*	{
 	/* note that flex makes the longest match and '.' is any but not nl */
 	LEXOUT(("comment(%s) ", ub_c_text)); /* ignore */ }
 server{COLON}			{ YDVAR(0, VAR_SERVER) }
@@ -228,6 +228,7 @@ outgoing-num-tcp{COLON}		{ YDVAR(1, VAR_OUTGOING_NUM_TCP) }
 incoming-num-tcp{COLON}		{ YDVAR(1, VAR_INCOMING_NUM_TCP) }
 do-ip4{COLON}			{ YDVAR(1, VAR_DO_IP4) }
 do-ip6{COLON}			{ YDVAR(1, VAR_DO_IP6) }
+do-nat64{COLON}			{ YDVAR(1, VAR_DO_NAT64) }
 prefer-ip4{COLON}		{ YDVAR(1, VAR_PREFER_IP4) }
 prefer-ip6{COLON}		{ YDVAR(1, VAR_PREFER_IP6) }
 do-udp{COLON}			{ YDVAR(1, VAR_DO_UDP) }
@@ -241,6 +242,7 @@ tcp-reuse-timeout{COLON}	{ YDVAR(1, VAR_TCP_REUSE_TIMEOUT) }
 tcp-auth-query-timeout{COLON}	{ YDVAR(1, VAR_TCP_AUTH_QUERY_TIMEOUT) }
 edns-tcp-keepalive{COLON}	{ YDVAR(1, VAR_EDNS_TCP_KEEPALIVE) }
 edns-tcp-keepalive-timeout{COLON} { YDVAR(1, VAR_EDNS_TCP_KEEPALIVE_TIMEOUT) }
+sock-queue-timeout{COLON} { YDVAR(1, VAR_SOCK_QUEUE_TIMEOUT) }
 ssl-upstream{COLON}		{ YDVAR(1, VAR_SSL_UPSTREAM) }
 tls-upstream{COLON}		{ YDVAR(1, VAR_SSL_UPSTREAM) }
 ssl-service-key{COLON}		{ YDVAR(1, VAR_SSL_SERVICE_KEY) }
@@ -317,6 +319,7 @@ harden-dnssec-stripped{COLON}	{ YDVAR(1, VAR_HARDEN_DNSSEC_STRIPPED) }
 harden-below-nxdomain{COLON}	{ YDVAR(1, VAR_HARDEN_BELOW_NXDOMAIN) }
 harden-referral-path{COLON}	{ YDVAR(1, VAR_HARDEN_REFERRAL_PATH) }
 harden-algo-downgrade{COLON}	{ YDVAR(1, VAR_HARDEN_ALGO_DOWNGRADE) }
+harden-unknown-additional{COLON}	{ YDVAR(1, VAR_HARDEN_UNKNOWN_ADDITIONAL) }
 use-caps-for-id{COLON}		{ YDVAR(1, VAR_USE_CAPS_FOR_ID) }
 caps-whitelist{COLON}		{ YDVAR(1, VAR_CAPS_WHITELIST) }
 caps-exempt{COLON}		{ YDVAR(1, VAR_CAPS_WHITELIST) }
@@ -414,7 +417,7 @@ val-log-level{COLON}		{ YDVAR(1, VAR_VAL_LOG_LEVEL) }
 key-cache-size{COLON}		{ YDVAR(1, VAR_KEY_CACHE_SIZE) }
 key-cache-slabs{COLON}		{ YDVAR(1, VAR_KEY_CACHE_SLABS) }
 neg-cache-size{COLON}		{ YDVAR(1, VAR_NEG_CACHE_SIZE) }
-val-nsec3-keysize-iterations{COLON}	{ 
+val-nsec3-keysize-iterations{COLON}	{
 				  YDVAR(1, VAR_VAL_NSEC3_KEYSIZE_ITERATIONS) }
 zonemd-permissive-mode{COLON}	{ YDVAR(1, VAR_ZONEMD_PERMISSIVE_MODE) }
 zonemd-check{COLON}		{ YDVAR(1, VAR_ZONEMD_CHECK) }
@@ -463,6 +466,7 @@ max-udp-size{COLON}		{ YDVAR(1, VAR_MAX_UDP_SIZE) }
 dns64-prefix{COLON}		{ YDVAR(1, VAR_DNS64_PREFIX) }
 dns64-synthall{COLON}		{ YDVAR(1, VAR_DNS64_SYNTHALL) }
 dns64-ignore-aaaa{COLON}	{ YDVAR(1, VAR_DNS64_IGNORE_AAAA) }
+nat64-prefix{COLON}		{ YDVAR(1, VAR_NAT64_PREFIX) }
 define-tag{COLON}		{ YDVAR(1, VAR_DEFINE_TAG) }
 local-zone-tag{COLON}		{ YDVAR(2, VAR_LOCAL_ZONE_TAG) }
 access-control-tag{COLON}	{ YDVAR(2, VAR_ACCESS_CONTROL_TAG) }
@@ -504,6 +508,7 @@ dnstap-log-forwarder-response-messages{COLON}	{
 		YDVAR(1, VAR_DNSTAP_LOG_FORWARDER_RESPONSE_MESSAGES) }
 disable-dnssec-lame-check{COLON} { YDVAR(1, VAR_DISABLE_DNSSEC_LAME_CHECK) }
 ip-ratelimit{COLON}		{ YDVAR(1, VAR_IP_RATELIMIT) }
+ip-ratelimit-cookie{COLON}	{ YDVAR(1, VAR_IP_RATELIMIT_COOKIE) }
 ratelimit{COLON}		{ YDVAR(1, VAR_RATELIMIT) }
 ip-ratelimit-slabs{COLON}		{ YDVAR(1, VAR_IP_RATELIMIT_SLABS) }
 ratelimit-slabs{COLON}		{ YDVAR(1, VAR_RATELIMIT_SLABS) }
@@ -555,6 +560,8 @@ backend{COLON}			{ YDVAR(1, VAR_CACHEDB_BACKEND) }
 secret-seed{COLON}		{ YDVAR(1, VAR_CACHEDB_SECRETSEED) }
 redis-server-host{COLON}	{ YDVAR(1, VAR_CACHEDB_REDISHOST) }
 redis-server-port{COLON}	{ YDVAR(1, VAR_CACHEDB_REDISPORT) }
+redis-server-path{COLON}	{ YDVAR(1, VAR_CACHEDB_REDISPATH) }
+redis-server-password{COLON}	{ YDVAR(1, VAR_CACHEDB_REDISPASSWORD) }
 redis-timeout{COLON}		{ YDVAR(1, VAR_CACHEDB_REDISTIMEOUT) }
 redis-expire-records{COLON}	{ YDVAR(1, VAR_CACHEDB_REDISEXPIRERECORDS) }
 ipset{COLON}			{ YDVAR(0, VAR_IPSET) }
@@ -562,6 +569,8 @@ name-v4{COLON}			{ YDVAR(1, VAR_IPSET_NAME_V4) }
 name-v6{COLON}			{ YDVAR(1, VAR_IPSET_NAME_V6) }
 udp-upstream-without-downstream{COLON} { YDVAR(1, VAR_UDP_UPSTREAM_WITHOUT_DOWNSTREAM) }
 tcp-connection-limit{COLON}	{ YDVAR(2, VAR_TCP_CONNECTION_LIMIT) }
+answer-cookie{COLON}		{ YDVAR(1, VAR_ANSWER_COOKIE ) }
+cookie-secret{COLON}		{ YDVAR(1, VAR_COOKIE_SECRET) }
 edns-client-string{COLON}	{ YDVAR(2, VAR_EDNS_CLIENT_STRING) }
 edns-client-string-opcode{COLON} { YDVAR(1, VAR_EDNS_CLIENT_STRING_OPCODE) }
 nsid{COLON}			{ YDVAR(1, VAR_NSID ) }
diff --git a/contrib/unbound/util/configparser.y b/contrib/unbound/util/configparser.y
index f21c30815b3f..d8f25a67ebbf 100644
--- a/contrib/unbound/util/configparser.y
+++ b/contrib/unbound/util/configparser.y
@@ -47,6 +47,7 @@
 #include "util/configyyrename.h"
 #include "util/config_file.h"
 #include "util/net_help.h"
+#include "sldns/str2wire.h"
 
 int ub_c_lex(void);
 void ub_c_error(const char *message);
@@ -73,9 +74,10 @@ extern struct config_parser_state* cfg_parser;
 %token VAR_FORCE_TOPLEVEL
 %token VAR_SERVER VAR_VERBOSITY VAR_NUM_THREADS VAR_PORT
 %token VAR_OUTGOING_RANGE VAR_INTERFACE VAR_PREFER_IP4
-%token VAR_DO_IP4 VAR_DO_IP6 VAR_PREFER_IP6 VAR_DO_UDP VAR_DO_TCP
+%token VAR_DO_IP4 VAR_DO_IP6 VAR_DO_NAT64 VAR_PREFER_IP6 VAR_DO_UDP VAR_DO_TCP
 %token VAR_TCP_MSS VAR_OUTGOING_TCP_MSS VAR_TCP_IDLE_TIMEOUT
 %token VAR_EDNS_TCP_KEEPALIVE VAR_EDNS_TCP_KEEPALIVE_TIMEOUT
+%token VAR_SOCK_QUEUE_TIMEOUT
 %token VAR_CHROOT VAR_USERNAME VAR_DIRECTORY VAR_LOGFILE VAR_PIDFILE
 %token VAR_MSG_CACHE_SIZE VAR_MSG_CACHE_SLABS VAR_NUM_QUERIES_PER_THREAD
 %token VAR_RRSET_CACHE_SIZE VAR_RRSET_CACHE_SLABS VAR_OUTGOING_NUM_TCP
@@ -123,6 +125,7 @@ extern struct config_parser_state* cfg_parser;
 %token VAR_UNBLOCK_LAN_ZONES VAR_INSECURE_LAN_ZONES
 %token VAR_INFRA_CACHE_MIN_RTT VAR_INFRA_CACHE_MAX_RTT VAR_INFRA_KEEP_PROBING
 %token VAR_DNS64_PREFIX VAR_DNS64_SYNTHALL VAR_DNS64_IGNORE_AAAA
+%token VAR_NAT64_PREFIX
 %token VAR_DNSTAP VAR_DNSTAP_ENABLE VAR_DNSTAP_SOCKET_PATH VAR_DNSTAP_IP
 %token VAR_DNSTAP_TLS VAR_DNSTAP_TLS_SERVER_NAME VAR_DNSTAP_TLS_CERT_BUNDLE
 %token VAR_DNSTAP_TLS_CLIENT_KEY_FILE VAR_DNSTAP_TLS_CLIENT_CERT_FILE
@@ -175,12 +178,13 @@ extern struct config_parser_state* cfg_parser;
 %token VAR_IPSECMOD_MAX_TTL VAR_IPSECMOD_WHITELIST VAR_IPSECMOD_STRICT
 %token VAR_CACHEDB VAR_CACHEDB_BACKEND VAR_CACHEDB_SECRETSEED
 %token VAR_CACHEDB_REDISHOST VAR_CACHEDB_REDISPORT VAR_CACHEDB_REDISTIMEOUT
-%token VAR_CACHEDB_REDISEXPIRERECORDS
+%token VAR_CACHEDB_REDISEXPIRERECORDS VAR_CACHEDB_REDISPATH VAR_CACHEDB_REDISPASSWORD
 %token VAR_UDP_UPSTREAM_WITHOUT_DOWNSTREAM VAR_FOR_UPSTREAM
 %token VAR_AUTH_ZONE VAR_ZONEFILE VAR_MASTER VAR_URL VAR_FOR_DOWNSTREAM
 %token VAR_FALLBACK_ENABLED VAR_TLS_ADDITIONAL_PORT VAR_LOW_RTT VAR_LOW_RTT_PERMIL
 %token VAR_FAST_SERVER_PERMIL VAR_FAST_SERVER_NUM
 %token VAR_ALLOW_NOTIFY VAR_TLS_WIN_CERT VAR_TCP_CONNECTION_LIMIT
+%token VAR_ANSWER_COOKIE VAR_COOKIE_SECRET VAR_IP_RATELIMIT_COOKIE
 %token VAR_FORWARD_NO_CACHE VAR_STUB_NO_CACHE VAR_LOG_SERVFAIL VAR_DENY_ANY
 %token VAR_UNKNOWN_SERVER_TIME_LIMIT VAR_LOG_TAG_QUERYREPLY
 %token VAR_STREAM_WAIT_SIZE VAR_TLS_CIPHERS VAR_TLS_CIPHERSUITES VAR_TLS_USE_SNI
@@ -194,6 +198,7 @@ extern struct config_parser_state* cfg_parser;
 %token VAR_INTERFACE_ACTION VAR_INTERFACE_VIEW VAR_INTERFACE_TAG
 %token VAR_INTERFACE_TAG_ACTION VAR_INTERFACE_TAG_DATA
 %token VAR_PROXY_PROTOCOL_PORT VAR_STATISTICS_INHIBIT_ZERO
+%token VAR_HARDEN_UNKNOWN_ADDITIONAL
 
 %%
 toplevelvars: /* empty */ | toplevelvars toplevelvar ;
@@ -222,10 +227,11 @@ contents_server: contents_server content_server
 	| ;
 content_server: server_num_threads | server_verbosity | server_port |
 	server_outgoing_range | server_do_ip4 |
-	server_do_ip6 | server_prefer_ip4 | server_prefer_ip6 |
-	server_do_udp | server_do_tcp |
+	server_do_ip6 | server_do_nat64 | server_prefer_ip4 |
+	server_prefer_ip6 | server_do_udp | server_do_tcp |
 	server_tcp_mss | server_outgoing_tcp_mss | server_tcp_idle_timeout |
 	server_tcp_keepalive | server_tcp_keepalive_timeout |
+	server_sock_queue_timeout |
 	server_interface | server_chroot | server_username |
 	server_directory | server_logfile | server_pidfile |
 	server_msg_cache_size | server_msg_cache_slabs |
@@ -273,6 +279,7 @@ content_server: server_num_threads | server_verbosity | server_port |
 	server_so_reuseport | server_delay_close | server_udp_connect |
 	server_unblock_lan_zones | server_insecure_lan_zones |
 	server_dns64_prefix | server_dns64_synthall | server_dns64_ignore_aaaa |
+	server_nat64_prefix |
 	server_infra_cache_min_rtt | server_infra_cache_max_rtt | server_harden_algo_downgrade |
 	server_ip_transparent | server_ip_ratelimit | server_ratelimit |
 	server_ip_dscp | server_infra_keep_probing |
@@ -302,7 +309,7 @@ content_server: server_num_threads | server_verbosity | server_port |
 	server_serve_expired |
 	server_serve_expired_ttl | server_serve_expired_ttl_reset |
 	server_serve_expired_reply_ttl | server_serve_expired_client_timeout |
-	server_ede_serve_expired | server_serve_original_ttl | server_fake_dsa | 
+	server_ede_serve_expired | server_serve_original_ttl | server_fake_dsa |
 	server_log_identity | server_use_systemd |
 	server_response_ip_tag | server_response_ip | server_response_ip_data |
 	server_shm_enable | server_shm_key | server_fake_sha1 |
@@ -318,12 +325,14 @@ content_server: server_num_threads | server_verbosity | server_port |
 	server_unknown_server_time_limit | server_log_tag_queryreply |
 	server_stream_wait_size | server_tls_ciphers |
 	server_tls_ciphersuites | server_tls_session_ticket_keys |
+	server_answer_cookie | server_cookie_secret | server_ip_ratelimit_cookie |
 	server_tls_use_sni | server_edns_client_string |
 	server_edns_client_string_opcode | server_nsid |
 	server_zonemd_permissive_mode | server_max_reuse_tcp_queries |
 	server_tcp_reuse_timeout | server_tcp_auth_query_timeout |
 	server_interface_automatic_ports | server_ede |
-	server_proxy_protocol_port | server_statistics_inhibit_zero
+	server_proxy_protocol_port | server_statistics_inhibit_zero |
+	server_harden_unknown_additional
 	;
 stubstart: VAR_STUB_ZONE
 	{
@@ -486,7 +495,7 @@ rpz_signal_nxdomain_ra: VAR_RPZ_SIGNAL_NXDOMAIN_RA STRING_ARG
 rpzstart: VAR_RPZ
 	{
 		struct config_auth* s;
-		OUTYY(("\nP(rpz:)\n")); 
+		OUTYY(("\nP(rpz:)\n"));
 		cfg_parser->started_toplevel = 1;
 		s = (struct config_auth*)calloc(1, sizeof(struct config_auth));
 		if(s) {
@@ -502,7 +511,7 @@ rpzstart: VAR_RPZ
 		}
 	}
 	;
-contents_rpz: contents_rpz content_rpz 
+contents_rpz: contents_rpz content_rpz
 	| ;
 content_rpz: auth_name | auth_zonefile | rpz_tag | auth_master | auth_url |
 	   auth_allow_notify | rpz_action_override | rpz_cname_override |
@@ -850,6 +859,15 @@ server_do_ip6: VAR_DO_IP6 STRING_ARG
 		free($2);
 	}
 	;
+server_do_nat64: VAR_DO_NAT64 STRING_ARG
+	{
+		OUTYY(("P(server_do_nat64:%s)\n", $2));
+		if(strcmp($2, "yes") != 0 && strcmp($2, "no") != 0)
+			yyerror("expected yes or no.");
+		else cfg_parser->cfg->do_nat64 = (strcmp($2, "yes")==0);
+		free($2);
+	}
+	;
 server_do_udp: VAR_DO_UDP STRING_ARG
 	{
 		OUTYY(("P(server_do_udp:%s)\n", $2));
@@ -972,6 +990,19 @@ server_tcp_keepalive_timeout: VAR_EDNS_TCP_KEEPALIVE_TIMEOUT STRING_ARG
 		free($2);
 	}
 	;
+server_sock_queue_timeout: VAR_SOCK_QUEUE_TIMEOUT STRING_ARG
+	{
+		OUTYY(("P(server_sock_queue_timeout:%s)\n", $2));
+		if(atoi($2) == 0 && strcmp($2, "0") != 0)
+			yyerror("number expected");
+		else if (atoi($2) > 6553500)
+			cfg_parser->cfg->sock_queue_timeout = 6553500;
+		else if (atoi($2) < 1)
+			cfg_parser->cfg->sock_queue_timeout = 0;
+		else cfg_parser->cfg->sock_queue_timeout = atoi($2);
+		free($2);
+	}
+	;
 server_tcp_upstream: VAR_TCP_UPSTREAM STRING_ARG
 	{
 		OUTYY(("P(server_tcp_upstream:%s)\n", $2));
@@ -1132,7 +1163,7 @@ server_http_nodelay: VAR_HTTP_NODELAY STRING_ARG
 			yyerror("expected yes or no.");
 		else cfg_parser->cfg->http_nodelay = (strcmp($2, "yes")==0);
 		free($2);
-	}
+	};
 server_http_notls_downstream: VAR_HTTP_NOTLS_DOWNSTREAM STRING_ARG
 	{
 		OUTYY(("P(server_http_notls_downstream:%s)\n", $2));
@@ -1778,6 +1809,16 @@ server_harden_algo_downgrade: VAR_HARDEN_ALGO_DOWNGRADE STRING_ARG
 		free($2);
 	}
 	;
+server_harden_unknown_additional: VAR_HARDEN_UNKNOWN_ADDITIONAL STRING_ARG
+	{
+		OUTYY(("P(server_harden_unknown_additional:%s)\n", $2));
+		if(strcmp($2, "yes") != 0 && strcmp($2, "no") != 0)
+			yyerror("expected yes or no.");
+		else cfg_parser->cfg->harden_unknown_additional =
+			(strcmp($2, "yes")==0);
+		free($2);
+	}
+	;
 server_use_caps_for_id: VAR_USE_CAPS_FOR_ID STRING_ARG
 	{
 		OUTYY(("P(server_use_caps_for_id:%s)\n", $2));
@@ -2169,6 +2210,7 @@ server_permit_small_holddown: VAR_PERMIT_SMALL_HOLDDOWN STRING_ARG
 			(strcmp($2, "yes")==0);
 		free($2);
 	}
+	;
 server_key_cache_size: VAR_KEY_CACHE_SIZE STRING_ARG
 	{
 		OUTYY(("P(server_key_cache_size:%s)\n", $2));
@@ -2206,6 +2248,7 @@ server_local_zone: VAR_LOCAL_ZONE STRING_ARG STRING_ARG
 		   strcmp($3, "transparent")!=0 && strcmp($3, "nodefault")!=0
 		   && strcmp($3, "typetransparent")!=0
 		   && strcmp($3, "always_transparent")!=0
+		   && strcmp($3, "block_a")!=0
 		   && strcmp($3, "always_refuse")!=0
 		   && strcmp($3, "always_nxdomain")!=0
 		   && strcmp($3, "always_nodata")!=0
@@ -2218,7 +2261,7 @@ server_local_zone: VAR_LOCAL_ZONE STRING_ARG STRING_ARG
 			yyerror("local-zone type: expected static, deny, "
 				"refuse, redirect, transparent, "
 				"typetransparent, inform, inform_deny, "
-				"inform_redirect, always_transparent, "
+				"inform_redirect, always_transparent, block_a,"
 				"always_refuse, always_nxdomain, "
 				"always_nodata, always_deny, always_null, "
 				"noview, nodefault or ipset");
@@ -2333,6 +2376,13 @@ server_dns64_ignore_aaaa: VAR_DNS64_IGNORE_AAAA STRING_ARG
 			fatal_exit("out of memory adding dns64-ignore-aaaa");
 	}
 	;
+server_nat64_prefix: VAR_NAT64_PREFIX STRING_ARG
+	{
+		OUTYY(("P(nat64_prefix:%s)\n", $2));
+		free(cfg_parser->cfg->nat64_prefix);
+		cfg_parser->cfg->nat64_prefix = $2;
+	}
+	;
 server_define_tag: VAR_DEFINE_TAG STRING_ARG
 	{
 		char* p, *s = $2;
@@ -2518,6 +2568,15 @@ server_ip_ratelimit: VAR_IP_RATELIMIT STRING_ARG
 		free($2);
 	}
 	;
+server_ip_ratelimit_cookie: VAR_IP_RATELIMIT_COOKIE STRING_ARG
+	{
+		OUTYY(("P(server_ip_ratelimit_cookie:%s)\n", $2));
+		if(atoi($2) == 0 && strcmp($2, "0") != 0)
+			yyerror("number expected");
+		else cfg_parser->cfg->ip_ratelimit_cookie = atoi($2);
+		free($2);
+	}
+	;
 server_ratelimit: VAR_RATELIMIT STRING_ARG
 	{
 		OUTYY(("P(server_ratelimit:%s)\n", $2));
@@ -2713,7 +2772,7 @@ server_pad_responses: VAR_PAD_RESPONSES STRING_ARG
 		OUTYY(("P(server_pad_responses:%s)\n", $2));
 		if(strcmp($2, "yes") != 0 && strcmp($2, "no") != 0)
 			yyerror("expected yes or no.");
-		else cfg_parser->cfg->pad_responses = 
+		else cfg_parser->cfg->pad_responses =
 			(strcmp($2, "yes")==0);
 		free($2);
 	}
@@ -2732,7 +2791,7 @@ server_pad_queries: VAR_PAD_QUERIES STRING_ARG
 		OUTYY(("P(server_pad_queries:%s)\n", $2));
 		if(strcmp($2, "yes") != 0 && strcmp($2, "no") != 0)
 			yyerror("expected yes or no.");
-		else cfg_parser->cfg->pad_queries = 
+		else cfg_parser->cfg->pad_queries =
 			(strcmp($2, "yes")==0);
 		free($2);
 	}
@@ -3471,9 +3530,10 @@ py_script: VAR_PYTHON_SCRIPT STRING_ARG
 		if(!cfg_strlist_append_ex(&cfg_parser->cfg->python_script, $2))
 			yyerror("out of memory");
 	}
+	;
 dynlibstart: VAR_DYNLIB
-	{ 
-		OUTYY(("\nP(dynlib:)\n")); 
+	{
+		OUTYY(("\nP(dynlib:)\n"));
 		cfg_parser->started_toplevel = 1;
 	}
 	;
@@ -3487,6 +3547,7 @@ dl_file: VAR_DYNLIB_FILE STRING_ARG
 		if(!cfg_strlist_append_ex(&cfg_parser->cfg->dynlib_file, $2))
 			yyerror("out of memory");
 	}
+	;
 server_disable_dnssec_lame_check: VAR_DISABLE_DNSSEC_LAME_CHECK STRING_ARG
 	{
 		OUTYY(("P(disable_dnssec_lame_check:%s)\n", $2));
@@ -3547,7 +3608,6 @@ dnsc_dnscrypt_enable: VAR_DNSCRYPT_ENABLE STRING_ARG
 		free($2);
 	}
 	;
-
 dnsc_dnscrypt_port: VAR_DNSCRYPT_PORT STRING_ARG
 	{
 		OUTYY(("P(dnsc_dnscrypt_port:%s)\n", $2));
@@ -3641,7 +3701,7 @@ contents_cachedb: contents_cachedb content_cachedb
 	| ;
 content_cachedb: cachedb_backend_name | cachedb_secret_seed |
 	redis_server_host | redis_server_port | redis_timeout |
-	redis_expire_records
+	redis_expire_records | redis_server_path | redis_server_password
 	;
 cachedb_backend_name: VAR_CACHEDB_BACKEND STRING_ARG
 	{
@@ -3694,6 +3754,30 @@ redis_server_port: VAR_CACHEDB_REDISPORT STRING_ARG
 		free($2);
 	}
 	;
+redis_server_path: VAR_CACHEDB_REDISPATH STRING_ARG
+	{
+	#if defined(USE_CACHEDB) && defined(USE_REDIS)
+		OUTYY(("P(redis_server_path:%s)\n", $2));
+		free(cfg_parser->cfg->redis_server_path);
+		cfg_parser->cfg->redis_server_path = $2;
+	#else
+		OUTYY(("P(Compiled without cachedb or redis, ignoring)\n"));
+		free($2);
+	#endif
+	}
+	;
+redis_server_password: VAR_CACHEDB_REDISPASSWORD STRING_ARG
+	{
+	#if defined(USE_CACHEDB) && defined(USE_REDIS)
+		OUTYY(("P(redis_server_password:%s)\n", $2));
+		free(cfg_parser->cfg->redis_server_password);
+		cfg_parser->cfg->redis_server_password = $2;
+	#else
+		OUTYY(("P(Compiled without cachedb or redis, ignoring)\n"));
+		free($2);
+	#endif
+	}
+	;
 redis_timeout: VAR_CACHEDB_REDISTIMEOUT STRING_ARG
 	{
 	#if defined(USE_CACHEDB) && defined(USE_REDIS)
@@ -3731,6 +3815,31 @@ server_tcp_connection_limit: VAR_TCP_CONNECTION_LIMIT STRING_ARG STRING_ARG
 		}
 	}
 	;
+server_answer_cookie: VAR_ANSWER_COOKIE STRING_ARG
+	{
+		OUTYY(("P(server_answer_cookie:%s)\n", $2));
+		if(strcmp($2, "yes") != 0 && strcmp($2, "no") != 0)
+			yyerror("expected yes or no.");
+		else cfg_parser->cfg->do_answer_cookie = (strcmp($2, "yes")==0);
+		free($2);
+	}
+	;
+server_cookie_secret: VAR_COOKIE_SECRET STRING_ARG
+	{
+		uint8_t secret[32];
+		size_t secret_len = sizeof(secret);
+
+		OUTYY(("P(server_cookie_secret:%s)\n", $2));
+		if(sldns_str2wire_hex_buf($2, secret, &secret_len)
+		|| (secret_len != 16))
+			yyerror("expected 128 bit hex string");
+		else {
+			cfg_parser->cfg->cookie_secret_len = secret_len;
+			memcpy(cfg_parser->cfg->cookie_secret, secret, sizeof(secret));
+		}
+		free($2);
+	}
+	;
 	ipsetstart: VAR_IPSET
 		{
 			OUTYY(("\nP(ipset:)\n"));
@@ -3800,10 +3909,11 @@ validate_acl_action(const char* action)
 		strcmp(action, "refuse_non_local")!=0 &&
 		strcmp(action, "allow_setrd")!=0 &&
 		strcmp(action, "allow")!=0 &&
-		strcmp(action, "allow_snoop")!=0)
+		strcmp(action, "allow_snoop")!=0 &&
+		strcmp(action, "allow_cookie")!=0)
 	{
 		yyerror("expected deny, refuse, deny_non_local, "
-			"refuse_non_local, allow, allow_setrd or "
-			"allow_snoop as access control action");
+			"refuse_non_local, allow, allow_setrd, "
+			"allow_snoop or allow_cookie as access control action");
 	}
 }
diff --git a/contrib/unbound/util/data/msgencode.c b/contrib/unbound/util/data/msgencode.c
index fe21cfb86bd1..a170eb7b8a67 100644
--- a/contrib/unbound/util/data/msgencode.c
+++ b/contrib/unbound/util/data/msgencode.c
@@ -806,6 +806,95 @@ calc_edns_field_size(struct edns_data* edns)
 	return 1 + 2 + 2 + 4 + 2 + rdatalen;
 }
 
+uint16_t
+calc_edns_option_size(struct edns_data* edns, uint16_t code)
+{
+	size_t rdatalen = 0;
+	struct edns_option* opt;
+	if(!edns || !edns->edns_present)
+		return 0;
+	for(opt = edns->opt_list_inplace_cb_out; opt; opt = opt->next) {
+		if(opt->opt_code == code)
+			rdatalen += 4 + opt->opt_len;
+	}
+	for(opt = edns->opt_list_out; opt; opt = opt->next) {
+		if(opt->opt_code == code)
+			rdatalen += 4 + opt->opt_len;
+	}
+	return rdatalen;
+}
+
+uint16_t
+calc_ede_option_size(struct edns_data* edns, uint16_t* txt_size)
+{
+	size_t rdatalen = 0;
+	struct edns_option* opt;
+	*txt_size = 0;
+	if(!edns || !edns->edns_present)
+		return 0;
+	for(opt = edns->opt_list_inplace_cb_out; opt; opt = opt->next) {
+		if(opt->opt_code == LDNS_EDNS_EDE) {
+			rdatalen += 4 + opt->opt_len;
+			if(opt->opt_len > 2) *txt_size += opt->opt_len - 2;
+			if(opt->opt_len >= 2 && sldns_read_uint16(
+				opt->opt_data) == LDNS_EDE_OTHER) {
+				*txt_size += 4 + 2;
+			}
+		}
+	}
+	for(opt = edns->opt_list_out; opt; opt = opt->next) {
+		if(opt->opt_code == LDNS_EDNS_EDE) {
+			rdatalen += 4 + opt->opt_len;
+			if(opt->opt_len > 2) *txt_size += opt->opt_len - 2;
+			if(opt->opt_len >= 2 && sldns_read_uint16(
+				opt->opt_data) == LDNS_EDE_OTHER) {
+				*txt_size += 4 + 2;
+			}
+		}
+	}
+	return rdatalen;
+}
+
+/* Trims the EDE OPTION-DATA to not include any EXTRA-TEXT data.
+ * Also removes any LDNS_EDE_OTHER options from the list since they are useless
+ * without the extra text. */
+static void
+ede_trim_text(struct edns_option** list)
+{
+	struct edns_option* curr, *prev = NULL;
+	if(!list || !(*list)) return;
+	/* Unlink and repoint if LDNS_EDE_OTHER are first in list */
+	while(list && *list && (*list)->opt_code == LDNS_EDNS_EDE
+		&& (*list)->opt_len >= 2
+		&& sldns_read_uint16((*list)->opt_data) == LDNS_EDE_OTHER ) {
+		*list = (*list)->next;
+	}
+	if(!list || !(*list)) return;
+	curr = *list;
+	while(curr) {
+		if(curr->opt_code == LDNS_EDNS_EDE) {
+			if(curr->opt_len >= 2 && sldns_read_uint16(
+				curr->opt_data) == LDNS_EDE_OTHER) {
+				/* LDNS_EDE_OTHER cannot be the first option in
+				 * this while, so prev is always initialized at
+				 * this point from the other branches;
+				 * cut this option off */
+				prev->next = curr->next;
+				curr = curr->next;
+			} else if(curr->opt_len > 2) {
+				/* trim this option's EXTRA-TEXT */
+				curr->opt_len = 2;
+				prev = curr;
+				curr = curr->next;
+			}
+		} else {
+			/* continue */
+			prev = curr;
+			curr = curr->next;
+		}
+	}
+}
+
 static void
 attach_edns_record_max_msg_sz(sldns_buffer* pkt, struct edns_data* edns,
 	uint16_t max_msg_sz)
@@ -894,6 +983,7 @@ reply_info_answer_encode(struct query_info* qinf, struct reply_info* rep,
 {
 	uint16_t flags;
 	unsigned int attach_edns = 0;
+	uint16_t edns_field_size, ede_size, ede_txt_size;
 
 	if(!cached || rep->authoritative) {
 		/* original flags, copy RD and CD bits from query. */
@@ -916,25 +1006,39 @@ reply_info_answer_encode(struct query_info* qinf, struct reply_info* rep,
 	log_assert(flags & BIT_QR); /* QR bit must be on in our replies */
 	if(udpsize < LDNS_HEADER_SIZE)
 		return 0;
+	/* currently edns does not change during calculations;
+	 * calculate sizes once here */
+	edns_field_size = calc_edns_field_size(edns);
+	ede_size = calc_ede_option_size(edns, &ede_txt_size);
 	if(sldns_buffer_capacity(pkt) < udpsize)
 		udpsize = sldns_buffer_capacity(pkt);
-	if(udpsize < LDNS_HEADER_SIZE + calc_edns_field_size(edns)) {
+	/* EDEs are optional, try to fit anything else before them */
+	if(udpsize < LDNS_HEADER_SIZE + edns_field_size - ede_size) {
 		/* packet too small to contain edns, omit it. */
 		attach_edns = 0;
 	} else {
 		/* reserve space for edns record */
-		attach_edns = (unsigned int)calc_edns_field_size(edns);
-		udpsize -= attach_edns;
+		attach_edns = (unsigned int)edns_field_size - ede_size;
 	}
 
 	if(!reply_info_encode(qinf, rep, id, flags, pkt, timenow, region,
-		udpsize, dnssec, MINIMAL_RESPONSES)) {
+		udpsize - attach_edns, dnssec, MINIMAL_RESPONSES)) {
 		log_err("reply encode: out of memory");
 		return 0;
 	}
-	if(attach_edns && sldns_buffer_capacity(pkt) >=
-		sldns_buffer_limit(pkt)+attach_edns)
-		attach_edns_record_max_msg_sz(pkt, edns, udpsize+attach_edns);
+	if(attach_edns) {
+		if(udpsize >= sldns_buffer_limit(pkt) + edns_field_size)
+			attach_edns_record_max_msg_sz(pkt, edns, udpsize);
+		else if(udpsize >= sldns_buffer_limit(pkt) + edns_field_size - ede_txt_size) {
+			ede_trim_text(&edns->opt_list_inplace_cb_out);
+			ede_trim_text(&edns->opt_list_out);
+			attach_edns_record_max_msg_sz(pkt, edns, udpsize);
+		} else if(udpsize >= sldns_buffer_limit(pkt) + edns_field_size - ede_size) {
+			edns_opt_list_remove(&edns->opt_list_inplace_cb_out, LDNS_EDNS_EDE);
+			edns_opt_list_remove(&edns->opt_list_out, LDNS_EDNS_EDE);
+			attach_edns_record_max_msg_sz(pkt, edns, udpsize);
+		}
+	}
 	return 1;
 }
 
@@ -958,15 +1062,17 @@ qinfo_query_encode(sldns_buffer* pkt, struct query_info* qinfo)
 	sldns_buffer_flip(pkt);
 }
 
-void 
-error_encode(sldns_buffer* buf, int r, struct query_info* qinfo,
-	uint16_t qid, uint16_t qflags, struct edns_data* edns)
+void
+extended_error_encode(sldns_buffer* buf, uint16_t rcode,
+	struct query_info* qinfo, uint16_t qid, uint16_t qflags,
+	uint16_t xflags, struct edns_data* edns)
 {
 	uint16_t flags;
 
 	sldns_buffer_clear(buf);
 	sldns_buffer_write(buf, &qid, sizeof(uint16_t));
-	flags = (uint16_t)(BIT_QR | BIT_RA | r); /* QR and retcode*/
+	flags = (uint16_t)(BIT_QR | BIT_RA | (rcode & 0xF)); /* QR and retcode*/
+	flags |= xflags;
 	flags |= (qflags & (BIT_RD|BIT_CD)); /* copy RD and CD bit */
 	sldns_buffer_write_u16(buf, flags);
 	if(qinfo) flags = 1;
@@ -993,11 +1099,25 @@ error_encode(sldns_buffer* buf, int r, struct query_info* qinfo,
 		struct edns_data es = *edns;
 		es.edns_version = EDNS_ADVERTISED_VERSION;
 		es.udp_size = EDNS_ADVERTISED_SIZE;
-		es.ext_rcode = 0;
+		es.ext_rcode = (uint8_t)(rcode >> 4);
 		es.bits &= EDNS_DO;
 		if(sldns_buffer_limit(buf) + calc_edns_field_size(&es) >
-			edns->udp_size)
-			return;
+			edns->udp_size) {
+			edns_opt_list_remove(&es.opt_list_inplace_cb_out, LDNS_EDNS_EDE);
+			edns_opt_list_remove(&es.opt_list_out, LDNS_EDNS_EDE);
+			if(sldns_buffer_limit(buf) + calc_edns_field_size(&es) >
+				edns->udp_size) {
+				return;
+			}
+		}
 		attach_edns_record(buf, &es);
 	}
 }
+
+void
+error_encode(sldns_buffer* buf, int r, struct query_info* qinfo,
+	uint16_t qid, uint16_t qflags, struct edns_data* edns)
+{
+	extended_error_encode(buf, (r & 0x000F), qinfo, qid, qflags,
+		(r & 0xFFF0), edns);
+}
diff --git a/contrib/unbound/util/data/msgencode.h b/contrib/unbound/util/data/msgencode.h
index 30dc515cbe59..6aff06099ee9 100644
--- a/contrib/unbound/util/data/msgencode.h
+++ b/contrib/unbound/util/data/msgencode.h
@@ -109,6 +109,27 @@ void qinfo_query_encode(struct sldns_buffer* pkt, struct query_info* qinfo);
 uint16_t calc_edns_field_size(struct edns_data* edns);
 
 /**
+ * Calculate the size of a specific EDNS option in packet.
+ * @param edns: edns data or NULL.
+ * @param code: the opt code to get the size of.
+ * @return octets the option will take up.
+ */
+uint16_t calc_edns_option_size(struct edns_data* edns, uint16_t code);
+
+/**
+ * Calculate the size of the EDE option(s) in packet. Also calculate seperately
+ * the size of the EXTRA-TEXT field(s) in case we can trim them to fit.
+ * In this case include any LDNS_EDE_OTHER options in their entirety since they
+ * are useless without extra text.
+ * @param edns: edns data or NULL.
+ * @param txt_size: the size of the EXTRA-TEXT field(s); this includes
+ *	LDNS_EDE_OTHER in their entirety since they are useless without
+ *	extra text.
+ * @return octets the option will take up.
+ */
+uint16_t calc_ede_option_size(struct edns_data* edns, uint16_t* txt_size);
+
+/**
  * Attach EDNS record to buffer. Buffer has complete packet. There must
  * be enough room left for the EDNS record.
  * @param pkt: packet added to.
@@ -116,11 +137,11 @@ uint16_t calc_edns_field_size(struct edns_data* edns);
  */
 void attach_edns_record(struct sldns_buffer* pkt, struct edns_data* edns);
 
-/** 
+/**
  * Encode an error. With QR and RA set.
  *
  * @param pkt: where to store the packet.
- * @param r: RCODE value to encode.
+ * @param r: RCODE value to encode (may contain extra flags).
  * @param qinfo: if not NULL, the query is included.
  * @param qid: query ID to set in packet. network order.
  * @param qflags: original query flags (to copy RD and CD bits). host order.
@@ -130,4 +151,21 @@ void attach_edns_record(struct sldns_buffer* pkt, struct edns_data* edns);
 void error_encode(struct sldns_buffer* pkt, int r, struct query_info* qinfo,
 	uint16_t qid, uint16_t qflags, struct edns_data* edns);
 
+/**
+ * Encode an extended error. With QR and RA set.
+ *
+ * @param pkt: where to store the packet.
+ * @param rcode: Extended RCODE value to encode.
+ * @param qinfo: if not NULL, the query is included.
+ * @param qid: query ID to set in packet. network order.
+ * @param qflags: original query flags (to copy RD and CD bits). host order.
+ * @param xflags: extra flags to set (such as for example BIT_AA and/or BIT_TC)
+ * @param edns: if not NULL, this is the query edns info,
+ * 	and an edns reply is attached. Only attached if EDNS record fits reply.
+ * 	Without edns extended errors (i.e. > 15) will not be conveyed.
+ */
+void extended_error_encode(struct sldns_buffer* pkt, uint16_t rcode,
+	struct query_info* qinfo, uint16_t qid, uint16_t qflags,
+	uint16_t xflags, struct edns_data* edns);
+
 #endif /* UTIL_DATA_MSGENCODE_H */
diff --git a/contrib/unbound/util/data/msgparse.c b/contrib/unbound/util/data/msgparse.c
index 5bb69d6ed06f..b5414c6d0a55 100644
--- a/contrib/unbound/util/data/msgparse.c
+++ b/contrib/unbound/util/data/msgparse.c
@@ -45,6 +45,8 @@
 #include "util/netevent.h"
 #include "util/storage/lookup3.h"
 #include "util/regional.h"
+#include "util/rfc_1982.h"
+#include "util/edns.h"
 #include "sldns/rrdef.h"
 #include "sldns/sbuffer.h"
 #include "sldns/parseutil.h"
@@ -940,22 +942,11 @@ parse_packet(sldns_buffer* pkt, struct msg_parse* msg, struct regional* region)
 	return 0;
 }
 
-static int
-edns_opt_list_append_keepalive(struct edns_option** list, int msec,
-		struct regional* region)
-{
-	uint8_t data[2]; /* For keepalive value */
-	data[0] = (uint8_t)((msec >> 8) & 0xff);
-	data[1] = (uint8_t)(msec & 0xff);
-	return edns_opt_list_append(list, LDNS_EDNS_KEEPALIVE, sizeof(data),
-			data, region);
-}
-
 /** parse EDNS options from EDNS wireformat rdata */
 static int
 parse_edns_options_from_query(uint8_t* rdata_ptr, size_t rdata_len,
 	struct edns_data* edns, struct config_file* cfg, struct comm_point* c,
-	struct regional* region)
+	struct comm_reply* repinfo, uint32_t now, struct regional* region)
 {
 	/* To respond with a Keepalive option, the client connection must have
 	 * received one message with a TCP Keepalive EDNS option, and that
@@ -979,6 +970,10 @@ parse_edns_options_from_query(uint8_t* rdata_ptr, size_t rdata_len,
 	while(rdata_len >= 4) {
 		uint16_t opt_code = sldns_read_uint16(rdata_ptr);
 		uint16_t opt_len = sldns_read_uint16(rdata_ptr+2);
+		uint8_t server_cookie[40];
+		enum edns_cookie_val_status cookie_val_status;
+		int cookie_is_v4 = 1;
+
 		rdata_ptr += 4;
 		rdata_len -= 4;
 		if(opt_len > rdata_len)
@@ -1041,6 +1036,76 @@ parse_edns_options_from_query(uint8_t* rdata_ptr, size_t rdata_len,
 			edns->padding_block_size = cfg->pad_responses_block_size;
 			break;
 
+		case LDNS_EDNS_COOKIE:
+			if(!cfg || !cfg->do_answer_cookie || !repinfo)
+				break;
+			if(opt_len != 8 && (opt_len < 16 || opt_len > 40)) {
+				verbose(VERB_ALGO, "worker request: "
+					"badly formatted cookie");
+				return LDNS_RCODE_FORMERR;
+			}
+			edns->cookie_present = 1;
+
+			/* Copy client cookie, version and timestamp for
+			 * validation and creation purposes.
+			 */
+			if(opt_len >= 16) {
+				memmove(server_cookie, rdata_ptr, 16);
+			} else {
+				memset(server_cookie, 0, 16);
+				memmove(server_cookie, rdata_ptr, opt_len);
+			}
+
+			/* Copy client ip for validation and creation
+			 * purposes. It will be overwritten if (re)creation
+			 * is needed.
+			 */
+			if(repinfo->remote_addr.ss_family == AF_INET) {
+				memcpy(server_cookie + 16,
+					&((struct sockaddr_in*)&repinfo->remote_addr)->sin_addr, 4);
+			} else {
+				cookie_is_v4 = 0;
+				memcpy(server_cookie + 16,
+					&((struct sockaddr_in6*)&repinfo->remote_addr)->sin6_addr, 16);
+			}
+
+			cookie_val_status = edns_cookie_server_validate(
+				rdata_ptr, opt_len, cfg->cookie_secret,
+				cfg->cookie_secret_len, cookie_is_v4,
+				server_cookie, now);
+			switch(cookie_val_status) {
+			case COOKIE_STATUS_VALID:
+			case COOKIE_STATUS_VALID_RENEW:
+				edns->cookie_valid = 1;
+				/* Reuse cookie */
+				if(!edns_opt_list_append(
+					&edns->opt_list_out, LDNS_EDNS_COOKIE,
+					opt_len, rdata_ptr, region)) {
+					log_err("out of memory");
+					return LDNS_RCODE_SERVFAIL;
+				}
+				/* Cookie to be reused added to outgoing
+				 * options. Done!
+				 */
+				break;
+			case COOKIE_STATUS_CLIENT_ONLY:
+				edns->cookie_client = 1;
+				/* fallthrough */
+			case COOKIE_STATUS_FUTURE:
+			case COOKIE_STATUS_EXPIRED:
+			case COOKIE_STATUS_INVALID:
+			default:
+				edns_cookie_server_write(server_cookie,
+					cfg->cookie_secret, cookie_is_v4, now);
+				if(!edns_opt_list_append(&edns->opt_list_out,
+					LDNS_EDNS_COOKIE, 24, server_cookie,
+					region)) {
+					log_err("out of memory");
+					return LDNS_RCODE_SERVFAIL;
+				}
+				break;
+			}
+			break;
 		default:
 			break;
 		}
@@ -1115,6 +1180,8 @@ parse_extract_edns_from_response_msg(struct msg_parse* msg,
 	edns->opt_list_out = NULL;
 	edns->opt_list_inplace_cb_out = NULL;
 	edns->padding_block_size = 0;
+	edns->cookie_present = 0;
+	edns->cookie_valid = 0;
 
 	/* take the options */
 	rdata_len = found->rr_first->size-2;
@@ -1170,7 +1237,8 @@ skip_pkt_rrs(sldns_buffer* pkt, int num)
 
 int 
 parse_edns_from_query_pkt(sldns_buffer* pkt, struct edns_data* edns,
-	struct config_file* cfg, struct comm_point* c, struct regional* region)
+	struct config_file* cfg, struct comm_point* c,
+	struct comm_reply* repinfo, time_t now, struct regional* region)
 {
 	size_t rdata_len;
 	uint8_t* rdata_ptr;
@@ -1206,6 +1274,8 @@ parse_edns_from_query_pkt(sldns_buffer* pkt, struct edns_data* edns,
 	edns->opt_list_out = NULL;
 	edns->opt_list_inplace_cb_out = NULL;
 	edns->padding_block_size = 0;
+	edns->cookie_present = 0;
+	edns->cookie_valid = 0;
 
 	/* take the options */
 	rdata_len = sldns_buffer_read_u16(pkt);
@@ -1214,7 +1284,7 @@ parse_edns_from_query_pkt(sldns_buffer* pkt, struct edns_data* edns,
 	rdata_ptr = sldns_buffer_current(pkt);
 	/* ignore rrsigs */
 	return parse_edns_options_from_query(rdata_ptr, rdata_len, edns, cfg,
-			c, region);
+		c, repinfo, now, region);
 }
 
 void
diff --git a/contrib/unbound/util/data/msgparse.h b/contrib/unbound/util/data/msgparse.h
index 0c458e6e8e25..b7dc235d677c 100644
--- a/contrib/unbound/util/data/msgparse.h
+++ b/contrib/unbound/util/data/msgparse.h
@@ -72,6 +72,7 @@ struct regional;
 struct edns_option;
 struct config_file;
 struct comm_point;
+struct comm_reply;
 
 /** number of buckets in parse rrset hash table. Must be power of 2. */
 #define PARSE_TABLE_SIZE 32
@@ -217,8 +218,6 @@ struct rr_parse {
  * region.
  */
 struct edns_data {
-	/** if EDNS OPT record was present */
-	int edns_present;
 	/** Extended RCODE */
 	uint8_t ext_rcode;
 	/** The EDNS version number */
@@ -238,7 +237,15 @@ struct edns_data {
 	struct edns_option* opt_list_inplace_cb_out;
 	/** block size to pad */
 	uint16_t padding_block_size;
-};
+	/** if EDNS OPT record was present */
+	unsigned int edns_present   : 1;
+	/** if a cookie was present */
+	unsigned int cookie_present : 1;
+	/** if the cookie validated */
+	unsigned int cookie_valid   : 1;
+	/** if the cookie holds only the client part */
+	unsigned int cookie_client  : 1;
+};	
 
 /**
  * EDNS option
@@ -310,12 +317,15 @@ int skip_pkt_rrs(struct sldns_buffer* pkt, int num);
  *	initialised.
  * @param cfg: the configuration (with nsid value etc.)
  * @param c: commpoint to determine transport (if needed)
+ * @param repinfo: commreply to determine the client address
+ * @param now: current time
  * @param region: region to alloc results in (edns option contents)
  * @return: 0 on success, or an RCODE on error.
  *	RCODE formerr if OPT is badly formatted and so on.
  */
 int parse_edns_from_query_pkt(struct sldns_buffer* pkt, struct edns_data* edns,
-	struct config_file* cfg, struct comm_point* c, struct regional* region);
+	struct config_file* cfg, struct comm_point* c,
+	struct comm_reply* repinfo, time_t now, struct regional* region);
 
 /**
  * Calculate hash value for rrset in packet.
diff --git a/contrib/unbound/util/data/msgreply.c b/contrib/unbound/util/data/msgreply.c
index 1e6ee97040cf..920a0a939d06 100644
--- a/contrib/unbound/util/data/msgreply.c
+++ b/contrib/unbound/util/data/msgreply.c
@@ -94,7 +94,7 @@ parse_create_qinfo(sldns_buffer* pkt, struct msg_parse* msg,
 struct reply_info*
 construct_reply_info_base(struct regional* region, uint16_t flags, size_t qd,
 	time_t ttl, time_t prettl, time_t expttl, size_t an, size_t ns,
-	size_t ar, size_t total, enum sec_status sec)
+	size_t ar, size_t total, enum sec_status sec, sldns_ede_code reason_bogus)
 {
 	struct reply_info* rep;
 	/* rrset_count-1 because the first ref is part of the struct. */
@@ -117,7 +117,9 @@ construct_reply_info_base(struct regional* region, uint16_t flags, size_t qd,
 	rep->ar_numrrsets = ar;
 	rep->rrset_count = total;
 	rep->security = sec;
-	rep->reason_bogus = LDNS_EDE_NONE;
+	rep->reason_bogus = reason_bogus;
+	/* this is only allocated and used for caching on copy */
+	rep->reason_bogus_str = NULL;
 	rep->authoritative = 0;
 	/* array starts after the refs */
 	if(region)
@@ -137,7 +139,7 @@ parse_create_repinfo(struct msg_parse* msg, struct reply_info** rep,
 {
 	*rep = construct_reply_info_base(region, msg->flags, msg->qdcount, 0, 
 		0, 0, msg->an_rrsets, msg->ns_rrsets, msg->ar_rrsets, 
-		msg->rrset_count, sec_status_unchecked);
+		msg->rrset_count, sec_status_unchecked, LDNS_EDE_NONE);
 	if(!*rep)
 		return 0;
 	return 1;
@@ -182,7 +184,7 @@ make_new_reply_info(const struct reply_info* rep, struct regional* region,
 	new_rep = construct_reply_info_base(region, rep->flags,
 		rep->qdcount, rep->ttl, rep->prefetch_ttl,
 		rep->serve_expired_ttl, an_numrrsets, 0, 0, an_numrrsets,
-		sec_status_insecure);
+		sec_status_insecure, LDNS_EDE_NONE);
 	if(!new_rep)
 		return NULL;
 	if(!reply_info_alloc_rrset_keys(new_rep, NULL, region))
@@ -580,6 +582,10 @@ reply_info_parsedelete(struct reply_info* rep, struct alloc_cache* alloc)
 	for(i=0; i<rep->rrset_count; i++) {
 		ub_packed_rrset_parsedelete(rep->rrsets[i], alloc);
 	}
+	if(rep->reason_bogus_str) {
+		free(rep->reason_bogus_str);
+		rep->reason_bogus_str = NULL;
+	}
 	free(rep);
 }
 
@@ -661,6 +667,10 @@ void
 reply_info_delete(void* d, void* ATTR_UNUSED(arg))
 {
 	struct reply_info* r = (struct reply_info*)d;
+	if(r->reason_bogus_str) {
+		free(r->reason_bogus_str);
+		r->reason_bogus_str = NULL;
+	}
 	free(r);
 }
 
@@ -737,17 +747,36 @@ repinfo_copy_rrsets(struct reply_info* dest, struct reply_info* from,
 	return 1;
 }
 
-struct reply_info* 
-reply_info_copy(struct reply_info* rep, struct alloc_cache* alloc, 
+struct reply_info*
+reply_info_copy(struct reply_info* rep, struct alloc_cache* alloc,
 	struct regional* region)
 {
 	struct reply_info* cp;
-	cp = construct_reply_info_base(region, rep->flags, rep->qdcount, 
-		rep->ttl, rep->prefetch_ttl, rep->serve_expired_ttl, 
+	cp = construct_reply_info_base(region, rep->flags, rep->qdcount,
+		rep->ttl, rep->prefetch_ttl, rep->serve_expired_ttl,
 		rep->an_numrrsets, rep->ns_numrrsets, rep->ar_numrrsets,
-		rep->rrset_count, rep->security);
+		rep->rrset_count, rep->security, rep->reason_bogus);
 	if(!cp)
 		return NULL;
+
+	if(rep->reason_bogus_str && *rep->reason_bogus_str != 0) {
+		if(region) {
+			cp->reason_bogus_str = (char*)regional_alloc(region,
+				sizeof(char)
+				* (strlen(rep->reason_bogus_str)+1));
+		} else {
+			cp->reason_bogus_str = malloc(sizeof(char)
+				* (strlen(rep->reason_bogus_str)+1));
+		}
+		if(!cp->reason_bogus_str) {
+			if(!region)
+				reply_info_parsedelete(cp, alloc);
+			return NULL;
+		}
+		memcpy(cp->reason_bogus_str, rep->reason_bogus_str,
+			strlen(rep->reason_bogus_str)+1);
+	}
+
 	/* allocate ub_key structures special or not */
 	if(!reply_info_alloc_rrset_keys(cp, alloc, region)) {
 		if(!region)
@@ -1020,6 +1049,16 @@ int edns_opt_list_append_ede(struct edns_option** list, struct regional* region,
 	return 1;
 }
 
+int edns_opt_list_append_keepalive(struct edns_option** list, int msec,
+	struct regional* region)
+{
+	uint8_t data[2]; /* For keepalive value */
+	data[0] = (uint8_t)((msec >> 8) & 0xff);
+	data[1] = (uint8_t)(msec & 0xff);
+	return edns_opt_list_append(list, LDNS_EDNS_KEEPALIVE, sizeof(data),
+		data, region);
+}
+
 int edns_opt_list_append(struct edns_option** list, uint16_t code, size_t len,
 	uint8_t* data, struct regional* region)
 {
@@ -1195,7 +1234,7 @@ int inplace_cb_query_response_call(struct module_env* env,
 }
 
 struct edns_option* edns_opt_copy_region(struct edns_option* list,
-        struct regional* region)
+	struct regional* region)
 {
 	struct edns_option* result = NULL, *cur = NULL, *s;
 	while(list) {
@@ -1224,6 +1263,42 @@ struct edns_option* edns_opt_copy_region(struct edns_option* list,
 	return result;
 }
 
+struct edns_option* edns_opt_copy_filter_region(struct edns_option* list,
+	uint16_t* filter_list, size_t filter_list_len, struct regional* region)
+{
+	struct edns_option* result = NULL, *cur = NULL, *s;
+	size_t i;
+	while(list) {
+		for(i=0; i<filter_list_len; i++)
+			if(filter_list[i] == list->opt_code) goto found;
+		if(i == filter_list_len) goto next;
+found:
+		/* copy edns option structure */
+		s = regional_alloc_init(region, list, sizeof(*list));
+		if(!s) return NULL;
+		s->next = NULL;
+
+		/* copy option data */
+		if(s->opt_data) {
+			s->opt_data = regional_alloc_init(region, s->opt_data,
+				s->opt_len);
+			if(!s->opt_data)
+				return NULL;
+		}
+
+		/* link into list */
+		if(cur)
+			cur->next = s;
+		else	result = s;
+		cur = s;
+
+next:
+		/* examine next element */
+		list = list->next;
+	}
+	return result;
+}
+
 int edns_opt_compare(struct edns_option* p, struct edns_option* q)
 {
 	if(!p && !q) return 0;
diff --git a/contrib/unbound/util/data/msgreply.h b/contrib/unbound/util/data/msgreply.h
index 9538adc5a8b2..a9af3d7e657d 100644
--- a/contrib/unbound/util/data/msgreply.h
+++ b/contrib/unbound/util/data/msgreply.h
@@ -170,9 +170,17 @@ struct reply_info {
 
 	/**
 	 * EDE (rfc8914) code with reason for DNSSEC bogus status.
+	 * Used for caching the EDE.
 	 */
 	sldns_ede_code reason_bogus;
 
+        /**
+         * EDE (rfc8914) NULL-terminated string with human-readable reason
+	 * for DNSSEC bogus status.
+	 * Used for caching the EDE.
+         */
+        char* reason_bogus_str;
+
 	/**
 	 * Number of RRsets in each section.
 	 * The answer section. Add up the RRs in every RRset to calculate
@@ -240,13 +248,15 @@ struct msgreply_entry {
  * @param ar: ar count
  * @param total: total rrset count (presumably an+ns+ar).
  * @param sec: security status of the reply info.
+ * @param reason_bogus: the Extended DNS Error for DNSSEC bogus status
  * @return the reply_info base struct with the array for putting the rrsets
  * in.  The array has been zeroed.  Returns NULL on malloc failure.
  */
 struct reply_info*
 construct_reply_info_base(struct regional* region, uint16_t flags, size_t qd,
-		time_t ttl, time_t prettl, time_t expttl, size_t an, size_t ns,
-		size_t ar, size_t total, enum sec_status sec);
+	time_t ttl, time_t prettl, time_t expttl, size_t an, size_t ns,
+	size_t ar, size_t total, enum sec_status sec,
+	sldns_ede_code reason_bogus);
 
 /** 
  * Parse wire query into a queryinfo structure, return 0 on parse error. 
@@ -568,6 +578,16 @@ int edns_opt_list_append_ede(struct edns_option** list, struct regional* region,
 	sldns_ede_code code, const char *txt);
 
 /**
+ * Append edns keep alive option to edns options list
+ * @param list: the edns option list to append the edns option to.
+ * @param msec: the duration in msecs for the keep alive.
+ * @param region: region to allocate the new edns option.
+ * @return false on failure.
+ */
+int edns_opt_list_append_keepalive(struct edns_option** list, int msec,
+	struct regional* region);
+
+/**
  * Remove any option found on the edns option list that matches the code.
  * @param list: the list of edns options.
  * @param code: the opt code to remove.
@@ -719,6 +739,12 @@ struct edns_option* edns_opt_copy_region(struct edns_option* list,
 	struct regional* region);
 
 /**
+ * Copy a filtered edns option list allocated to the new region
+ */
+struct edns_option* edns_opt_copy_filter_region(struct edns_option* list,
+	uint16_t* filter_list, size_t filter_list_len, struct regional* region);
+
+/**
  * Copy edns option list allocated with malloc
  */
 struct edns_option* edns_opt_copy_alloc(struct edns_option* list);
diff --git a/contrib/unbound/util/edns.c b/contrib/unbound/util/edns.c
index e0819f1cd3b4..276b92e6cee8 100644
--- a/contrib/unbound/util/edns.c
+++ b/contrib/unbound/util/edns.c
@@ -45,8 +45,11 @@
 #include "util/netevent.h"
 #include "util/net_help.h"
 #include "util/regional.h"
+#include "util/rfc_1982.h"
+#include "util/siphash.h"
 #include "util/data/msgparse.h"
 #include "util/data/msgreply.h"
+#include "sldns/sbuffer.h"
 
 #if 0
 /* XXX: remove me */
@@ -133,3 +136,59 @@ edns_string_addr_lookup(rbtree_type* tree, struct sockaddr_storage* addr,
 	return (struct edns_string_addr*)addr_tree_lookup(tree, addr, addrlen);
 }
 
+uint8_t*
+edns_cookie_server_hash(const uint8_t* in, const uint8_t* secret, int v4,
+	uint8_t* hash)
+{
+	v4?siphash(in, 20, secret, hash, 8):siphash(in, 32, secret, hash, 8);
+	return hash;
+}
+
+void
+edns_cookie_server_write(uint8_t* buf, const uint8_t* secret, int v4,
+	uint32_t timestamp)
+{
+	uint8_t hash[8];
+	buf[ 8] = 1;   /* Version */
+	buf[ 9] = 0;   /* Reserved */
+	buf[10] = 0;   /* Reserved */
+	buf[11] = 0;   /* Reserved */
+	sldns_write_uint32(buf + 12, timestamp);
+	(void)edns_cookie_server_hash(buf, secret, v4, hash);
+	memcpy(buf + 16, hash, 8);
+}
+
+enum edns_cookie_val_status
+edns_cookie_server_validate(const uint8_t* cookie, size_t cookie_len,
+	const uint8_t* secret, size_t secret_len, int v4,
+	const uint8_t* hash_input, uint32_t now)
+{
+	uint8_t hash[8];
+	uint32_t timestamp;
+	uint32_t subt_1982 = 0; /* Initialize for the compiler; unused value */
+	int comp_1982;
+	if(cookie_len != 24)
+		/* RFC9018 cookies are 24 bytes long */
+		return COOKIE_STATUS_CLIENT_ONLY;
+	if(secret_len != 16 ||  /* RFC9018 cookies have 16 byte secrets */
+		cookie[8] != 1) /* RFC9018 cookies are cookie version 1 */
+		return COOKIE_STATUS_INVALID;
+	timestamp = sldns_read_uint32(cookie + 12);
+	if((comp_1982 = compare_1982(now, timestamp)) > 0
+		&& (subt_1982 = subtract_1982(timestamp, now)) > 3600)
+		/* Cookie is older than 1 hour (see RFC9018 Section 4.3.) */
+		return COOKIE_STATUS_EXPIRED;
+	if(comp_1982 <= 0 && subtract_1982(now, timestamp) > 300)
+		/* Cookie time is more than 5 minutes in the future.
+		 * (see RFC9018 Section 4.3.) */
+		return COOKIE_STATUS_FUTURE;
+	if(memcmp(edns_cookie_server_hash(hash_input, secret, v4, hash),
+		cookie + 16, 8) != 0)
+		/* Hashes do not match */
+		return COOKIE_STATUS_INVALID;
+	if(comp_1982 > 0 && subt_1982 > 1800)
+		/* Valid cookie but older than 30 minutes, so create a new one
+		 * anyway */
+		return COOKIE_STATUS_VALID_RENEW;
+	return COOKIE_STATUS_VALID;
+}
diff --git a/contrib/unbound/util/edns.h b/contrib/unbound/util/edns.h
index d9ded0b84dc4..5da0ecb290a7 100644
--- a/contrib/unbound/util/edns.h
+++ b/contrib/unbound/util/edns.h
@@ -75,6 +75,15 @@ struct edns_string_addr {
 	size_t string_len;
 };
 
+enum edns_cookie_val_status {
+	COOKIE_STATUS_CLIENT_ONLY = -3,
+	COOKIE_STATUS_FUTURE = -2,
+	COOKIE_STATUS_EXPIRED = -1,
+	COOKIE_STATUS_INVALID = 0,
+	COOKIE_STATUS_VALID = 1,
+	COOKIE_STATUS_VALID_RENEW = 2,
+};
+
 /**
  * Create structure to hold EDNS strings
  * @return: newly created edns_strings, NULL on alloc failure.
@@ -106,4 +115,54 @@ struct edns_string_addr*
 edns_string_addr_lookup(rbtree_type* tree, struct sockaddr_storage* addr,
 	socklen_t addrlen);
 
+/**
+ * Compute the interoperable DNS cookie (RFC9018) hash.
+ * @param in: buffer input for the hash generation. It needs to be:
+ *	Client Cookie | Version | Reserved | Timestamp | Client-IP
+ * @param secret: the server secret; implicit length of 16 octets.
+ * @param v4: if the client IP is v4 or v6.
+ * @param hash: buffer to write the hash to.
+ * return a pointer to the hash.
+ */
+uint8_t* edns_cookie_server_hash(const uint8_t* in, const uint8_t* secret,
+	int v4, uint8_t* hash);
+
+/**
+ * Write an interoperable DNS server cookie (RFC9018).
+ * @param buf: buffer to write to. It should have a size of at least 32 octets
+ *	as it doubles as the output buffer and the hash input buffer.
+ *	The first 8 octets are expected to be the Client Cookie and will be
+ *		left untouched.
+ *	The next 8 octets will be written with Version | Reserved | Timestamp.
+ *	The next 4 or 16 octets are expected to be the IPv4 or the IPv6 address
+ *		based on the v4 flag.
+ *	Thus the first 20 or 32 octets, based on the v4 flag, will be used as
+ *		the hash input.
+ *	The server hash (8 octets) will be written after the first 16 octets;
+ *		overwriting the address information.
+ *	The caller expects a complete, 24 octet long cookie in the buffer.
+ * @param secret: the server secret; implicit length of 16 octets.
+ * @param v4: if the client IP is v4 or v6.
+ * @param timestamp: the timestamp to use.
+ */
+void edns_cookie_server_write(uint8_t* buf, const uint8_t* secret, int v4,
+	uint32_t timestamp);
+
+/**
+ * Validate an interoperable DNS cookie (RFC9018).
+ * @param cookie: pointer to the cookie data.
+ * @param cookie_len: the length of the cookie data.
+ * @param secret: pointer to the server secret.
+ * @param secret_len: the length of the secret.
+ * @param v4: if the client IP is v4 or v6.
+ * @param hash_input: pointer to the hash input for validation. It needs to be:
+ *	Client Cookie | Version | Reserved | Timestamp | Client-IP
+ * @param now: the current time.
+ * return edns_cookie_val_status with the cookie validation status i.e.,
+ *	<=0 for invalid, else valid.
+ */
+enum edns_cookie_val_status edns_cookie_server_validate(const uint8_t* cookie,
+	size_t cookie_len, const uint8_t* secret, size_t secret_len, int v4,
+	const uint8_t* hash_input, uint32_t now);
+
 #endif
diff --git a/contrib/unbound/util/fptr_wlist.c b/contrib/unbound/util/fptr_wlist.c
index dc8ab6693876..3b88da2358e5 100644
--- a/contrib/unbound/util/fptr_wlist.c
+++ b/contrib/unbound/util/fptr_wlist.c
@@ -659,6 +659,10 @@ int fptr_whitelist_inplace_cb_edns_back_parsed(
 #else
 	(void)fptr;
 #endif
+#ifdef WITH_PYTHONMODULE
+    if(fptr == &python_inplace_cb_edns_back_parsed_call)
+        return 1;
+#endif
 #ifdef WITH_DYNLIBMODULE
     if(fptr == &dynlib_inplace_cb_edns_back_parsed)
             return 1;
@@ -675,6 +679,10 @@ int fptr_whitelist_inplace_cb_query_response(
 #else
 	(void)fptr;
 #endif
+#ifdef WITH_PYTHONMODULE
+    if(fptr == &python_inplace_cb_query_response)
+        return 1;
+#endif
 #ifdef WITH_DYNLIBMODULE
     if(fptr == &dynlib_inplace_cb_query_response)
             return 1;
diff --git a/contrib/unbound/util/iana_ports.inc b/contrib/unbound/util/iana_ports.inc
index b816f8a0464e..5cb127ed897b 100644
--- a/contrib/unbound/util/iana_ports.inc
+++ b/contrib/unbound/util/iana_ports.inc
@@ -674,6 +674,8 @@
 911,
 912,
 913,
+914,
+915,
 989,
 990,
 991,
@@ -1901,6 +1903,7 @@
 2256,
 2257,
 2258,
+2259,
 2260,
 2261,
 2262,
@@ -2010,6 +2013,7 @@
 2366,
 2367,
 2368,
+2369,
 2370,
 2372,
 2378,
diff --git a/contrib/unbound/util/module.c b/contrib/unbound/util/module.c
index 6698f94971b8..773dab853d2f 100644
--- a/contrib/unbound/util/module.c
+++ b/contrib/unbound/util/module.c
@@ -84,8 +84,10 @@ void errinf_ede(struct module_qstate* qstate,
 	const char* str, sldns_ede_code reason_bogus)
 {
 	struct errinf_strlist* p;
-	if((qstate->env->cfg->val_log_level < 2 && !qstate->env->cfg->log_servfail) || !str)
+	if(!str || (qstate->env->cfg->val_log_level < 2 &&
+		!qstate->env->cfg->log_servfail)) {
 		return;
+	}
 	p = (struct errinf_strlist*)regional_alloc(qstate->region, sizeof(*p));
 	if(!p) {
 		log_err("malloc failure in validator-error-info string");
@@ -152,15 +154,19 @@ char* errinf_to_str_bogus(struct module_qstate* qstate)
 	return p;
 }
 
+/* Try to find the latest (most specific) dnssec failure */
 sldns_ede_code errinf_to_reason_bogus(struct module_qstate* qstate)
 {
 	struct errinf_strlist* s;
+	sldns_ede_code ede = LDNS_EDE_NONE;
 	for(s=qstate->errinf; s; s=s->next) {
-		if (s->reason_bogus != LDNS_EDE_NONE) {
-			return s->reason_bogus;
-		}
+		if(s->reason_bogus == LDNS_EDE_NONE) continue;
+		if(ede != LDNS_EDE_NONE
+			&& ede != LDNS_EDE_DNSSEC_BOGUS
+			&& s->reason_bogus == LDNS_EDE_DNSSEC_BOGUS) continue;
+		ede = s->reason_bogus;
 	}
-	return LDNS_EDE_NONE;
+	return ede;
 }
 
 char* errinf_to_str_servfail(struct module_qstate* qstate)
diff --git a/contrib/unbound/util/module.h b/contrib/unbound/util/module.h
index 013c65b02dcf..5b6fcc93cf1e 100644
--- a/contrib/unbound/util/module.h
+++ b/contrib/unbound/util/module.h
@@ -619,6 +619,12 @@ struct module_qstate {
 	/** if this is a validation recursion query that does not get
 	 * validation itself */
 	int is_valrec;
+#ifdef CLIENT_SUBNET
+	/** the client network address is needed for the client-subnet option
+	 *  when prefetching, but we can't use reply_list in mesh_info, because
+	 *  we don't want to send a reply for the internal query. */
+        struct sockaddr_storage client_addr;
+#endif
 
 	/** comm_reply contains server replies */
 	struct comm_reply* reply;
@@ -671,6 +677,8 @@ struct module_qstate {
 	 * those servers. By comparing expiry time with qstarttime for type NS.
 	 */
 	time_t qstarttime;
+	/** whether a message from cachedb will be used for the reply */
+	int is_cachedb_answer;
 
 	/**
 	 * Attributes of clients that share the qstate that may affect IP-based
@@ -818,11 +826,11 @@ void errinf_dname(struct module_qstate* qstate, const char* str,
  *    This string is malloced and has to be freed by caller.
  */
 char* errinf_to_str_bogus(struct module_qstate* qstate);
+
 /**
- * Check the sldns_ede_code of the qstate.
+ * Check the sldns_ede_code of the qstate->errinf.
  * @param qstate: query state.
- * @return LDNS_EDE_DNSSEC_BOGUS by default, or the first explicitly set
- *   sldns_ede_code.
+ * @return the latest explicitly set sldns_ede_code or LDNS_EDE_NONE.
  */
 sldns_ede_code errinf_to_reason_bogus(struct module_qstate* qstate);
 
diff --git a/contrib/unbound/util/net_help.c b/contrib/unbound/util/net_help.c
index 54fad6986f3c..e559c9b2fa6a 100644
--- a/contrib/unbound/util/net_help.c
+++ b/contrib/unbound/util/net_help.c
@@ -779,8 +779,8 @@ addr_in_common(struct sockaddr_storage* addr1, int net1,
 	return match;
 }
 
-void 
-addr_to_str(struct sockaddr_storage* addr, socklen_t addrlen, 
+void
+addr_to_str(struct sockaddr_storage* addr, socklen_t addrlen,
 	char* buf, size_t len)
 {
 	int af = (int)((struct sockaddr_in*)addr)->sin_family;
@@ -792,7 +792,50 @@ addr_to_str(struct sockaddr_storage* addr, socklen_t addrlen,
 	}
 }
 
-int 
+int
+prefixnet_is_nat64(int prefixnet)
+{
+	return (prefixnet == 32 || prefixnet == 40 ||
+		prefixnet == 48 || prefixnet == 56 ||
+		prefixnet == 64 || prefixnet == 96);
+}
+
+void
+addr_to_nat64(const struct sockaddr_storage* addr,
+	const struct sockaddr_storage* nat64_prefix,
+	socklen_t nat64_prefixlen, int nat64_prefixnet,
+	struct sockaddr_storage* nat64_addr, socklen_t* nat64_addrlen)
+{
+	struct sockaddr_in *sin = (struct sockaddr_in *)addr;
+	struct sockaddr_in6 *sin6;
+	uint8_t *v4_byte;
+
+	/* This needs to be checked by the caller */
+	log_assert(addr->ss_family == AF_INET);
+	/* Current usage is only from config values; prefix lengths enforced
+	 * during config validation */
+	log_assert(prefixnet_is_nat64(nat64_prefixnet));
+
+	*nat64_addr = *nat64_prefix;
+	*nat64_addrlen = nat64_prefixlen;
+
+	sin6 = (struct sockaddr_in6 *)nat64_addr;
+	sin6->sin6_flowinfo = 0;
+	sin6->sin6_port = sin->sin_port;
+
+	nat64_prefixnet = nat64_prefixnet / 8;
+
+	v4_byte = (uint8_t *)&sin->sin_addr.s_addr;
+	for(int i = 0; i < 4; i++) {
+		if(nat64_prefixnet == 8) {
+			/* bits 64...71 are MBZ */
+			sin6->sin6_addr.s6_addr[nat64_prefixnet++] = 0;
+		}
+		sin6->sin6_addr.s6_addr[nat64_prefixnet++] = *v4_byte++;
+	}
+}
+
+int
 addr_is_ip4mapped(struct sockaddr_storage* addr, socklen_t addrlen)
 {
 	/* prefix for ipv4 into ipv6 mapping is ::ffff:x.x.x.x */
@@ -1005,6 +1048,16 @@ listen_sslctx_setup(void* ctxt)
 			log_crypto_err("could not set cipher list with SSL_CTX_set_cipher_list");
 	}
 #endif
+#if defined(SSL_OP_IGNORE_UNEXPECTED_EOF)
+	/* ignore errors when peers do not send the mandatory close_notify
+	 * alert on shutdown.
+	 * Relevant for openssl >= 3 */
+	if((SSL_CTX_set_options(ctx, SSL_OP_IGNORE_UNEXPECTED_EOF) &
+		SSL_OP_IGNORE_UNEXPECTED_EOF) != SSL_OP_IGNORE_UNEXPECTED_EOF) {
+		log_crypto_err("could not set SSL_OP_IGNORE_UNEXPECTED_EOF");
+		return 0;
+	}
+#endif
 
 	if((SSL_CTX_set_options(ctx, SSL_OP_CIPHER_SERVER_PREFERENCE) &
 		SSL_OP_CIPHER_SERVER_PREFERENCE) !=
@@ -1234,6 +1287,17 @@ void* connect_sslctx_create(char* key, char* pem, char* verifypem, int wincert)
 		return 0;
 	}
 #endif
+#if defined(SSL_OP_IGNORE_UNEXPECTED_EOF)
+	/* ignore errors when peers do not send the mandatory close_notify
+	 * alert on shutdown.
+	 * Relevant for openssl >= 3 */
+	if((SSL_CTX_set_options(ctx, SSL_OP_IGNORE_UNEXPECTED_EOF) &
+		SSL_OP_IGNORE_UNEXPECTED_EOF) != SSL_OP_IGNORE_UNEXPECTED_EOF) {
+		log_crypto_err("could not set SSL_OP_IGNORE_UNEXPECTED_EOF");
+		SSL_CTX_free(ctx);
+		return 0;
+	}
+#endif
 	if(key && key[0]) {
 		if(!SSL_CTX_use_certificate_chain_file(ctx, pem)) {
 			log_err("error in client certificate %s", pem);
diff --git a/contrib/unbound/util/net_help.h b/contrib/unbound/util/net_help.h
index f1881b3ed0ca..a9de910d5461 100644
--- a/contrib/unbound/util/net_help.h
+++ b/contrib/unbound/util/net_help.h
@@ -332,6 +332,29 @@ void addr_to_str(struct sockaddr_storage* addr, socklen_t addrlen,
 	char* buf, size_t len);
 
 /**
+ * Check if the prefix network length is one of the allowed 32, 40, 48, 56, 64,
+ * or 96.
+ * @param prefixnet: prefix network length to check.
+ * @return 1 on success, 0 on failure.
+ */
+int prefixnet_is_nat64(int prefixnet);
+
+/**
+ * Create a NAT64 address from a given address (needs to be IPv4) and a given
+ * NAT64 prefix. The NAT64 prefix net needs to be one of 32, 40, 48, 56, 64, 96.
+ * @param addr: IPv4 address.
+ * @param nat64_prefix: NAT64 prefix.
+ * @param nat64_prefixlen: NAT64 prefix len.
+ * @param nat64_prefixnet: NAT64 prefix mask.
+ * @param nat64_addr: the resulting NAT64 address.
+ * @param nat64_addrlen: the resulting NAT64 address length.
+ */
+void addr_to_nat64(const struct sockaddr_storage* addr,
+	const struct sockaddr_storage* nat64_prefix,
+	socklen_t nat64_prefixlen, int nat64_prefixnet,
+	struct sockaddr_storage* nat64_addr, socklen_t* nat64_addrlen);
+
+/**
  * See if sockaddr is an ipv6 mapped ipv4 address, "::ffff:0.0.0.0"
  * @param addr: address
  * @param addrlen: length of address
diff --git a/contrib/unbound/util/netevent.c b/contrib/unbound/util/netevent.c
index fe3d511643f8..204e4883cf27 100644
--- a/contrib/unbound/util/netevent.c
+++ b/contrib/unbound/util/netevent.c
@@ -4,22 +4,22 @@
  * Copyright (c) 2007, NLnet Labs. All rights reserved.
  *
  * This software is open source.
- * 
+ *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
- * 
+ *
  * Redistributions of source code must retain the above copyright notice,
  * this list of conditions and the following disclaimer.
- * 
+ *
  * Redistributions in binary form must reproduce the above copyright notice,
  * this list of conditions and the following disclaimer in the documentation
  * and/or other materials provided with the distribution.
- * 
+ *
  * Neither the name of the NLNET LABS nor the names of its contributors may
  * be used to endorse or promote products derived from this software without
  * specific prior written permission.
- * 
+ *
  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
@@ -46,6 +46,7 @@
 #include "util/tcp_conn_limit.h"
 #include "util/fptr_wlist.h"
 #include "util/proxy_protocol.h"
+#include "util/timeval_func.h"
 #include "sldns/pkthdr.h"
 #include "sldns/sbuffer.h"
 #include "sldns/str2wire.h"
@@ -71,7 +72,9 @@
 #ifdef HAVE_OPENSSL_ERR_H
 #include <openssl/err.h>
 #endif
-
+#ifdef HAVE_LINUX_NET_TSTAMP_H
+#include <linux/net_tstamp.h>
+#endif
 /* -------- Start of local definitions -------- */
 /** if CMSG_ALIGN is not defined on this platform, a workaround */
 #ifndef CMSG_ALIGN
@@ -114,6 +117,16 @@
 /** timeout in millisec to wait for write to unblock, packets dropped after.*/
 #define SEND_BLOCKED_WAIT_TIMEOUT 200
 
+/** Let's make timestamping code cleaner and redefine SO_TIMESTAMP* */
+#ifndef SO_TIMESTAMP
+#define SO_TIMESTAMP 29
+#endif
+#ifndef SO_TIMESTAMPNS
+#define SO_TIMESTAMPNS 35
+#endif
+#ifndef SO_TIMESTAMPING
+#define SO_TIMESTAMPING 37
+#endif
 /**
  * The internal event structure for keeping ub_event info for the event.
  * Possibly other structures (list, tree) this is part of.
@@ -177,7 +190,7 @@ static struct comm_point* comm_point_create_tcp_handler(
 
 /* -------- End of local definitions -------- */
 
-struct comm_base* 
+struct comm_base*
 comm_base_create(int sigs)
 {
 	struct comm_base* b = (struct comm_base*)calloc(1,
@@ -220,7 +233,7 @@ comm_base_create_event(struct ub_event_base* base)
 	return b;
 }
 
-void 
+void
 comm_base_delete(struct comm_base* b)
 {
 	if(!b)
@@ -237,7 +250,7 @@ comm_base_delete(struct comm_base* b)
 	free(b);
 }
 
-void 
+void
 comm_base_delete_no_base(struct comm_base* b)
 {
 	if(!b)
@@ -253,14 +266,14 @@ comm_base_delete_no_base(struct comm_base* b)
 	free(b);
 }
 
-void 
+void
 comm_base_timept(struct comm_base* b, time_t** tt, struct timeval** tv)
 {
 	*tt = &b->eb->secs;
 	*tv = &b->eb->now;
 }
 
-void 
+void
 comm_base_dispatch(struct comm_base* b)
 {
 	int retval;
@@ -470,7 +483,7 @@ comm_point_send_udp_msg(struct comm_point *c, sldns_buffer* packet,
 				(struct sockaddr_storage*)addr, addrlen);
 		return 0;
 	} else if((size_t)sent != sldns_buffer_remaining(packet)) {
-		log_err("sent %d in place of %d bytes", 
+		log_err("sent %d in place of %d bytes",
 			(int)sent, (int)sldns_buffer_remaining(packet));
 		return 0;
 	}
@@ -489,7 +502,7 @@ static void p_ancil(const char* str, struct comm_reply* r)
 	if(r->srctype == 6) {
 #ifdef IPV6_PKTINFO
 		char buf[1024];
-		if(inet_ntop(AF_INET6, &r->pktinfo.v6info.ipi6_addr, 
+		if(inet_ntop(AF_INET6, &r->pktinfo.v6info.ipi6_addr,
 			buf, (socklen_t)sizeof(buf)) == 0) {
 			(void)strlcpy(buf, "(inet_ntop error)", sizeof(buf));
 		}
@@ -499,13 +512,13 @@ static void p_ancil(const char* str, struct comm_reply* r)
 	} else if(r->srctype == 4) {
 #ifdef IP_PKTINFO
 		char buf1[1024], buf2[1024];
-		if(inet_ntop(AF_INET, &r->pktinfo.v4info.ipi_addr, 
+		if(inet_ntop(AF_INET, &r->pktinfo.v4info.ipi_addr,
 			buf1, (socklen_t)sizeof(buf1)) == 0) {
 			(void)strlcpy(buf1, "(inet_ntop error)", sizeof(buf1));
 		}
 		buf1[sizeof(buf1)-1]=0;
 #ifdef HAVE_STRUCT_IN_PKTINFO_IPI_SPEC_DST
-		if(inet_ntop(AF_INET, &r->pktinfo.v4info.ipi_spec_dst, 
+		if(inet_ntop(AF_INET, &r->pktinfo.v4info.ipi_spec_dst,
 			buf2, (socklen_t)sizeof(buf2)) == 0) {
 			(void)strlcpy(buf2, "(inet_ntop error)", sizeof(buf2));
 		}
@@ -517,7 +530,7 @@ static void p_ancil(const char* str, struct comm_reply* r)
 			buf1, buf2);
 #elif defined(IP_RECVDSTADDR)
 		char buf1[1024];
-		if(inet_ntop(AF_INET, &r->pktinfo.v4addr, 
+		if(inet_ntop(AF_INET, &r->pktinfo.v4addr,
 			buf1, (socklen_t)sizeof(buf1)) == 0) {
 			(void)strlcpy(buf1, "(inet_ntop error)", sizeof(buf1));
 		}
@@ -531,7 +544,7 @@ static void p_ancil(const char* str, struct comm_reply* r)
 /** send a UDP reply over specified interface*/
 static int
 comm_point_send_udp_msg_if(struct comm_point *c, sldns_buffer* packet,
-	struct sockaddr* addr, socklen_t addrlen, struct comm_reply* r) 
+	struct sockaddr* addr, socklen_t addrlen, struct comm_reply* r)
 {
 #if defined(AF_INET6) && defined(IPV6_PKTINFO) && defined(HAVE_SENDMSG)
 	ssize_t sent;
@@ -579,6 +592,11 @@ comm_point_send_udp_msg_if(struct comm_point *c, sldns_buffer* packet,
 		cmsg_data = CMSG_DATA(cmsg);
 		((struct in_pktinfo *) cmsg_data)->ipi_ifindex = 0;
 		cmsg->cmsg_len = CMSG_LEN(sizeof(struct in_pktinfo));
+		/* zero the padding bytes inserted by the CMSG_LEN */
+		if(sizeof(struct in_pktinfo) < cmsg->cmsg_len)
+			memset(((uint8_t*)(CMSG_DATA(cmsg))) +
+				sizeof(struct in_pktinfo), 0, cmsg->cmsg_len
+				- sizeof(struct in_pktinfo));
 #elif defined(IP_SENDSRCADDR)
 		msg.msg_controllen = CMSG_SPACE(sizeof(struct in_addr));
 		log_assert(msg.msg_controllen <= sizeof(control.buf));
@@ -587,6 +605,11 @@ comm_point_send_udp_msg_if(struct comm_point *c, sldns_buffer* packet,
 		memmove(CMSG_DATA(cmsg), &r->pktinfo.v4addr,
 			sizeof(struct in_addr));
 		cmsg->cmsg_len = CMSG_LEN(sizeof(struct in_addr));
+		/* zero the padding bytes inserted by the CMSG_LEN */
+		if(sizeof(struct in_addr) < cmsg->cmsg_len)
+			memset(((uint8_t*)(CMSG_DATA(cmsg))) +
+				sizeof(struct in_addr), 0, cmsg->cmsg_len
+				- sizeof(struct in_addr));
 #else
 		verbose(VERB_ALGO, "no IP_PKTINFO or IP_SENDSRCADDR");
 		msg.msg_control = NULL;
@@ -603,6 +626,11 @@ comm_point_send_udp_msg_if(struct comm_point *c, sldns_buffer* packet,
 		cmsg_data = CMSG_DATA(cmsg);
 		((struct in6_pktinfo *) cmsg_data)->ipi6_ifindex = 0;
 		cmsg->cmsg_len = CMSG_LEN(sizeof(struct in6_pktinfo));
+		/* zero the padding bytes inserted by the CMSG_LEN */
+		if(sizeof(struct in6_pktinfo) < cmsg->cmsg_len)
+			memset(((uint8_t*)(CMSG_DATA(cmsg))) +
+				sizeof(struct in6_pktinfo), 0, cmsg->cmsg_len
+				- sizeof(struct in6_pktinfo));
 	} else {
 		/* try to pass all 0 to use default route */
 		msg.msg_controllen = CMSG_SPACE(sizeof(struct in6_pktinfo));
@@ -611,9 +639,14 @@ comm_point_send_udp_msg_if(struct comm_point *c, sldns_buffer* packet,
 		cmsg->cmsg_type = IPV6_PKTINFO;
 		memset(CMSG_DATA(cmsg), 0, sizeof(struct in6_pktinfo));
 		cmsg->cmsg_len = CMSG_LEN(sizeof(struct in6_pktinfo));
+		/* zero the padding bytes inserted by the CMSG_LEN */
+		if(sizeof(struct in6_pktinfo) < cmsg->cmsg_len)
+			memset(((uint8_t*)(CMSG_DATA(cmsg))) +
+				sizeof(struct in6_pktinfo), 0, cmsg->cmsg_len
+				- sizeof(struct in6_pktinfo));
 	}
 #endif /* S_SPLINT_S */
-	if(verbosity >= VERB_ALGO)
+	if(verbosity >= VERB_ALGO && r->srctype != 0)
 		p_ancil("send_udp over interface", r);
 	sent = sendmsg(c->fd, &msg, 0);
 	if(sent == -1) {
@@ -695,7 +728,7 @@ comm_point_send_udp_msg_if(struct comm_point *c, sldns_buffer* packet,
 		if(!udp_send_errno_needs_log(addr, addrlen))
 			return 0;
 		verbose(VERB_OPS, "sendmsg failed: %s", strerror(errno));
-		log_addr(VERB_OPS, "remote address is", 
+		log_addr(VERB_OPS, "remote address is",
 			(struct sockaddr_storage*)addr, addrlen);
 #ifdef __NetBSD__
 		/* netbsd 7 has IP_PKTINFO for recv but not send */
@@ -705,7 +738,7 @@ comm_point_send_udp_msg_if(struct comm_point *c, sldns_buffer* packet,
 #endif
 		return 0;
 	} else if((size_t)sent != sldns_buffer_remaining(packet)) {
-		log_err("sent %d in place of %d bytes", 
+		log_err("sent %d in place of %d bytes",
 			(int)sent, (int)sldns_buffer_remaining(packet));
 		return 0;
 	}
@@ -817,7 +850,7 @@ done:
 	return 1;
 }
 
-void 
+void
 comm_point_udp_ancil_callback(int fd, short event, void* arg)
 {
 #if defined(AF_INET6) && defined(IPV6_PKTINFO) && defined(HAVE_RECVMSG)
@@ -833,6 +866,9 @@ comm_point_udp_ancil_callback(int fd, short event, void* arg)
 #ifndef S_SPLINT_S
 	struct cmsghdr* cmsg;
 #endif /* S_SPLINT_S */
+#ifdef HAVE_LINUX_NET_TSTAMP_H
+	struct timespec *ts;
+#endif /* HAVE_LINUX_NET_TSTAMP_H */
 
 	rep.c = (struct comm_point*)arg;
 	log_assert(rep.c->type == comm_udp);
@@ -843,6 +879,7 @@ comm_point_udp_ancil_callback(int fd, short event, void* arg)
 	ub_comm_base_now(rep.c->ev->base);
 	for(i=0; i<NUM_UDP_PER_SELECT; i++) {
 		sldns_buffer_clear(rep.c->buffer);
+		timeval_clear(&rep.c->recv_tv);
 		rep.remote_addrlen = (socklen_t)sizeof(rep.remote_addr);
 		log_assert(fd != -1);
 		log_assert(sldns_buffer_remaining(rep.c->buffer) > 0);
@@ -894,9 +931,23 @@ comm_point_udp_ancil_callback(int fd, short event, void* arg)
 					sizeof(struct in_addr));
 				break;
 #endif /* IP_PKTINFO or IP_RECVDSTADDR */
+#ifdef HAVE_LINUX_NET_TSTAMP_H
+			} else if( cmsg->cmsg_level == SOL_SOCKET &&
+				cmsg->cmsg_type == SO_TIMESTAMPNS) {
+				ts = (struct timespec *)CMSG_DATA(cmsg);
+				TIMESPEC_TO_TIMEVAL(&rep.c->recv_tv, ts);
+			} else if( cmsg->cmsg_level == SOL_SOCKET &&
+				cmsg->cmsg_type == SO_TIMESTAMPING) {
+				ts = (struct timespec *)CMSG_DATA(cmsg);
+				TIMESPEC_TO_TIMEVAL(&rep.c->recv_tv, ts);
+			} else if( cmsg->cmsg_level == SOL_SOCKET &&
+				cmsg->cmsg_type == SO_TIMESTAMP) {
+				memmove(&rep.c->recv_tv, CMSG_DATA(cmsg), sizeof(struct timeval));
+#endif /* HAVE_LINUX_NET_TSTAMP_H */
 			}
 		}
-		if(verbosity >= VERB_ALGO)
+
+		if(verbosity >= VERB_ALGO && rep.srctype != 0)
 			p_ancil("receive_udp on interface", &rep);
 #endif /* S_SPLINT_S */
 
@@ -930,7 +981,7 @@ comm_point_udp_ancil_callback(int fd, short event, void* arg)
 #endif /* AF_INET6 && IPV6_PKTINFO && HAVE_RECVMSG */
 }
 
-void 
+void
 comm_point_udp_callback(int fd, short event, void* arg)
 {
 	struct comm_reply rep;
@@ -950,14 +1001,14 @@ comm_point_udp_callback(int fd, short event, void* arg)
 		rep.remote_addrlen = (socklen_t)sizeof(rep.remote_addr);
 		log_assert(fd != -1);
 		log_assert(sldns_buffer_remaining(rep.c->buffer) > 0);
-		rcv = recvfrom(fd, (void*)sldns_buffer_begin(rep.c->buffer), 
+		rcv = recvfrom(fd, (void*)sldns_buffer_begin(rep.c->buffer),
 			sldns_buffer_remaining(rep.c->buffer), MSG_DONTWAIT,
 			(struct sockaddr*)&rep.remote_addr, &rep.remote_addrlen);
 		if(rcv == -1) {
 #ifndef USE_WINSOCK
 			if(errno != EAGAIN && errno != EINTR
 				&& udp_recv_needs_log(errno))
-				log_err("recvfrom %d failed: %s", 
+				log_err("recvfrom %d failed: %s",
 					fd, strerror(errno));
 #else
 			if(WSAGetLastError() != WSAEINPROGRESS &&
@@ -1012,7 +1063,7 @@ int adjusted_tcp_timeout(struct comm_point* c)
 
 /** Use a new tcp handler for new query fd, set to read query */
 static void
-setup_tcp_handler(struct comm_point* c, int fd, int cur, int max) 
+setup_tcp_handler(struct comm_point* c, int fd, int cur, int max)
 {
 	int handler_usage;
 	log_assert(c->type == comm_tcp || c->type == comm_http);
@@ -1076,10 +1127,10 @@ int comm_point_perform_accept(struct comm_point* c,
 		/* EINTR is signal interrupt. others are closed connection. */
 		if(	errno == EINTR || errno == EAGAIN
 #ifdef EWOULDBLOCK
-			|| errno == EWOULDBLOCK 
+			|| errno == EWOULDBLOCK
 #endif
 #ifdef ECONNABORTED
-			|| errno == ECONNABORTED 
+			|| errno == ECONNABORTED
 #endif
 #ifdef EPROTO
 			|| errno == EPROTO
@@ -1253,7 +1304,7 @@ static int http2_submit_settings(struct http2_session* h2_session)
 #endif /* HAVE_NGHTTP2 */
 
 
-void 
+void
 comm_point_tcp_accept_callback(int fd, short event, void* arg)
 {
 	struct comm_point* c = (struct comm_point*)arg, *c_hdl;
@@ -2161,7 +2212,7 @@ comm_point_tcp_handle_read(int fd, struct comm_point* c, int short_ok)
 		log_err("in comm_point_tcp_handle_read buffer_remaining is "
 			"not > 0 as expected, continuing with (harmless) 0 "
 			"length recv");
-	r = recv(fd, (void*)sldns_buffer_current(c->buffer), 
+	r = recv(fd, (void*)sldns_buffer_current(c->buffer),
 		sldns_buffer_remaining(c->buffer), MSG_DONTWAIT);
 	if(r == 0) {
 		if(c->tcp_req_info)
@@ -2252,8 +2303,8 @@ recv_error:
 	return 0;
 }
 
-/** 
- * Handle tcp writing callback. 
+/**
+ * Handle tcp writing callback.
  * @param fd: file descriptor of socket.
  * @param c: comm point to write buffer out of.
  * @return: 0 on error
@@ -2277,7 +2328,7 @@ comm_point_tcp_handle_write(int fd, struct comm_point* c)
 		/* from Stevens, unix network programming, vol1, 3rd ed, p450*/
 		int error = 0;
 		socklen_t len = (socklen_t)sizeof(error);
-		if(getsockopt(fd, SOL_SOCKET, SO_ERROR, (void*)&error, 
+		if(getsockopt(fd, SOL_SOCKET, SO_ERROR, (void*)&error,
 			&len) < 0){
 #ifndef USE_WINSOCK
 			error = errno; /* on solaris errno is error */
@@ -2318,7 +2369,7 @@ comm_point_tcp_handle_write(int fd, struct comm_point* c)
 		return ssl_handle_it(c, 1);
 
 #ifdef USE_MSG_FASTOPEN
-	/* Only try this on first use of a connection that uses tfo, 
+	/* Only try this on first use of a connection that uses tfo,
 	   otherwise fall through to normal write */
 	/* Also, TFO support on WINDOWS not implemented at the moment */
 	if(c->tcp_do_fastopen == 1) {
@@ -2473,7 +2524,7 @@ comm_point_tcp_handle_write(int fd, struct comm_point* c)
 			if(WSAGetLastError() == WSAEWOULDBLOCK) {
 				ub_winsock_tcp_wouldblock(c->ev->ev,
 					UB_EV_WRITE);
-				return 1; 
+				return 1;
 			}
 			if(WSAGetLastError() == WSAECONNRESET && verbosity < 2)
 				return 0; /* silence reset by peer */
@@ -2522,7 +2573,7 @@ comm_point_tcp_handle_write(int fd, struct comm_point* c)
 			return 1;
 		if(WSAGetLastError() == WSAEWOULDBLOCK) {
 			ub_winsock_tcp_wouldblock(c->ev->ev, UB_EV_WRITE);
-			return 1; 
+			return 1;
 		}
 		if(WSAGetLastError() == WSAECONNRESET && verbosity < 2)
 			return 0; /* silence reset by peer */
@@ -2541,7 +2592,7 @@ comm_point_tcp_handle_write(int fd, struct comm_point* c)
 	if((!c->tcp_write_and_read && sldns_buffer_remaining(buffer) == 0) || (c->tcp_write_and_read && c->tcp_write_byte_count == c->tcp_write_pkt_len + 2)) {
 		tcp_callback_writer(c);
 	}
-	
+
 	return 1;
 }
 
@@ -2561,7 +2612,7 @@ tcp_req_info_read_again(int fd, struct comm_point* c)
 			if(!c->tcp_do_close) {
 				fptr_ok(fptr_whitelist_comm_point(
 					c->callback));
-				(void)(*c->callback)(c, c->cb_arg, 
+				(void)(*c->callback)(c, c->cb_arg,
 					NETEVENT_CLOSED, NULL);
 			}
 			return 0;
@@ -2618,7 +2669,7 @@ tcp_more_write_again(int fd, struct comm_point* c)
 	}
 }
 
-void 
+void
 comm_point_tcp_handle_callback(int fd, short event, void* arg)
 {
 	struct comm_point* c = (struct comm_point*)arg;
@@ -2783,7 +2834,7 @@ http_read_more(int fd, struct comm_point* c)
 {
 	ssize_t r;
 	log_assert(sldns_buffer_remaining(c->buffer) > 0);
-	r = recv(fd, (void*)sldns_buffer_current(c->buffer), 
+	r = recv(fd, (void*)sldns_buffer_current(c->buffer),
 		sldns_buffer_remaining(c->buffer), MSG_DONTWAIT);
 	if(r == 0) {
 		return 0;
@@ -3052,7 +3103,7 @@ http_chunked_segment(struct comm_point* c)
 		/* return and wait to read more */
 		return 1;
 	}
-	
+
 	/* callback of http reader for a new part of the data */
 	c->http_stored = 0;
 	sldns_buffer_set_position(c->buffer, 0);
@@ -3402,7 +3453,7 @@ http_check_connect(int fd, struct comm_point* c)
 	/* from Stevens, unix network programming, vol1, 3rd ed, p450*/
 	int error = 0;
 	socklen_t len = (socklen_t)sizeof(error);
-	if(getsockopt(fd, SOL_SOCKET, SO_ERROR, (void*)&error, 
+	if(getsockopt(fd, SOL_SOCKET, SO_ERROR, (void*)&error,
 		&len) < 0){
 #ifndef USE_WINSOCK
 		error = errno; /* on solaris errno is error */
@@ -3487,7 +3538,7 @@ http_write_more(int fd, struct comm_point* c)
 {
 	ssize_t r;
 	log_assert(sldns_buffer_remaining(c->buffer) > 0);
-	r = send(fd, (void*)sldns_buffer_current(c->buffer), 
+	r = send(fd, (void*)sldns_buffer_current(c->buffer),
 		sldns_buffer_remaining(c->buffer), 0);
 	if(r == -1) {
 #ifndef USE_WINSOCK
@@ -3498,7 +3549,7 @@ http_write_more(int fd, struct comm_point* c)
 			return 1;
 		if(WSAGetLastError() == WSAEWOULDBLOCK) {
 			ub_winsock_tcp_wouldblock(c->ev->ev, UB_EV_WRITE);
-			return 1; 
+			return 1;
 		}
 #endif
 		log_err_addr("http send r", sock_strerror(errno),
@@ -3619,8 +3670,8 @@ comm_point_http2_handle_write(int ATTR_UNUSED(fd), struct comm_point* c)
 #endif
 }
 
-/** 
- * Handle http writing callback. 
+/**
+ * Handle http writing callback.
  * @param fd: file descriptor of socket.
  * @param c: comm point to write buffer out of.
  * @return: 0 on error
@@ -3686,7 +3737,7 @@ comm_point_http_handle_write(int fd, struct comm_point* c)
 	return 1;
 }
 
-void 
+void
 comm_point_http_handle_callback(int fd, short event, void* arg)
 {
 	struct comm_point* c = (struct comm_point*)arg;
@@ -3739,7 +3790,7 @@ void comm_point_local_handle_callback(int fd, short event, void* arg)
 	if(event&UB_EV_READ) {
 		if(!comm_point_tcp_handle_read(fd, c, 1)) {
 			fptr_ok(fptr_whitelist_comm_point(c->callback));
-			(void)(*c->callback)(c, c->cb_arg, NETEVENT_CLOSED, 
+			(void)(*c->callback)(c, c->cb_arg, NETEVENT_CLOSED,
 				NULL);
 		}
 		return;
@@ -3747,21 +3798,21 @@ void comm_point_local_handle_callback(int fd, short event, void* arg)
 	log_err("Ignored event %d for localhdl.", event);
 }
 
-void comm_point_raw_handle_callback(int ATTR_UNUSED(fd), 
+void comm_point_raw_handle_callback(int ATTR_UNUSED(fd),
 	short event, void* arg)
 {
 	struct comm_point* c = (struct comm_point*)arg;
 	int err = NETEVENT_NOERROR;
 	log_assert(c->type == comm_raw);
 	ub_comm_base_now(c->ev->base);
-	
+
 	if(event&UB_EV_TIMEOUT)
 		err = NETEVENT_TIMEOUT;
 	fptr_ok(fptr_whitelist_comm_point_raw(c->callback));
 	(void)(*c->callback)(c, c->cb_arg, err, NULL);
 }
 
-struct comm_point* 
+struct comm_point*
 comm_point_create_udp(struct comm_base *base, int fd, sldns_buffer* buffer,
 	int pp2_enabled, comm_point_callback_type* callback,
 	void* callback_arg, struct unbound_socket* socket)
@@ -3809,7 +3860,11 @@ comm_point_create_udp(struct comm_base *base, int fd, sldns_buffer* buffer,
 	evbits = UB_EV_READ | UB_EV_PERSIST;
 	/* ub_event stuff */
 	c->ev->ev = ub_event_new(base->eb->base, c->fd, evbits,
+#ifdef USE_WINSOCK
 		comm_point_udp_callback, c);
+#else
+		comm_point_udp_ancil_callback, c);
+#endif
 	if(c->ev->ev == NULL) {
 		log_err("could not baseset udp event");
 		comm_point_delete(c);
@@ -3824,7 +3879,7 @@ comm_point_create_udp(struct comm_base *base, int fd, sldns_buffer* buffer,
 	return c;
 }
 
-struct comm_point* 
+struct comm_point*
 comm_point_create_udp_ancil(struct comm_base *base, int fd,
 	sldns_buffer* buffer, int pp2_enabled,
 	comm_point_callback_type* callback, void* callback_arg, struct unbound_socket* socket)
@@ -3887,8 +3942,8 @@ comm_point_create_udp_ancil(struct comm_base *base, int fd,
 	return c;
 }
 
-static struct comm_point* 
-comm_point_create_tcp_handler(struct comm_base *base, 
+static struct comm_point*
+comm_point_create_tcp_handler(struct comm_base *base,
 	struct comm_point* parent, size_t bufsize,
 	struct sldns_buffer* spoolbuf, comm_point_callback_type* callback,
 	void* callback_arg, struct unbound_socket* socket)
@@ -3985,8 +4040,8 @@ comm_point_create_tcp_handler(struct comm_base *base,
 	return c;
 }
 
-static struct comm_point* 
-comm_point_create_http_handler(struct comm_base *base, 
+static struct comm_point*
+comm_point_create_http_handler(struct comm_base *base,
 	struct comm_point* parent, size_t bufsize, int harden_large_queries,
 	uint32_t http_max_streams, char* http_endpoint,
 	comm_point_callback_type* callback, void* callback_arg,
@@ -4083,7 +4138,7 @@ comm_point_create_http_handler(struct comm_base *base,
 		return NULL;
 	}
 #endif
-	
+
 	/* add to parent free list */
 	c->tcp_free = parent->tcp_free;
 	parent->tcp_free = c;
@@ -4105,7 +4160,7 @@ comm_point_create_http_handler(struct comm_base *base,
 	return c;
 }
 
-struct comm_point* 
+struct comm_point*
 comm_point_create_tcp(struct comm_base *base, int fd, int num,
 	int idle_timeout, int harden_large_queries,
 	uint32_t http_max_streams, char* http_endpoint,
@@ -4203,11 +4258,11 @@ comm_point_create_tcp(struct comm_base *base, int fd, int num,
 			return NULL;
 		}
 	}
-	
+
 	return c;
 }
 
-struct comm_point* 
+struct comm_point*
 comm_point_create_tcp_out(struct comm_base *base, size_t bufsize,
         comm_point_callback_type* callback, void* callback_arg)
 {
@@ -4274,7 +4329,7 @@ comm_point_create_tcp_out(struct comm_base *base, size_t bufsize,
 	return c;
 }
 
-struct comm_point* 
+struct comm_point*
 comm_point_create_http_out(struct comm_base *base, size_t bufsize,
         comm_point_callback_type* callback, void* callback_arg,
 	sldns_buffer* temp)
@@ -4345,7 +4400,7 @@ comm_point_create_http_out(struct comm_base *base, size_t bufsize,
 	return c;
 }
 
-struct comm_point* 
+struct comm_point*
 comm_point_create_local(struct comm_base *base, int fd, size_t bufsize,
         comm_point_callback_type* callback, void* callback_arg)
 {
@@ -4413,8 +4468,8 @@ comm_point_create_local(struct comm_base *base, int fd, size_t bufsize,
 	return c;
 }
 
-struct comm_point* 
-comm_point_create_raw(struct comm_base* base, int fd, int writing, 
+struct comm_point*
+comm_point_create_raw(struct comm_base* base, int fd, int writing,
 	comm_point_callback_type* callback, void* callback_arg)
 {
 	struct comm_point* c = (struct comm_point*)calloc(1,
@@ -4478,7 +4533,7 @@ comm_point_create_raw(struct comm_base* base, int fd, int writing,
 	return c;
 }
 
-void 
+void
 comm_point_close(struct comm_point* c)
 {
 	if(!c)
@@ -4518,10 +4573,10 @@ comm_point_close(struct comm_point* c)
 	c->fd = -1;
 }
 
-void 
+void
 comm_point_delete(struct comm_point* c)
 {
-	if(!c) 
+	if(!c)
 		return;
 	if((c->type == comm_tcp || c->type == comm_http) && c->ssl) {
 #ifdef HAVE_SSL
@@ -4560,7 +4615,7 @@ comm_point_delete(struct comm_point* c)
 	free(c);
 }
 
-void 
+void
 comm_point_send_reply(struct comm_reply *repinfo)
 {
 	struct sldns_buffer* buffer;
@@ -4624,7 +4679,7 @@ comm_point_send_reply(struct comm_reply *repinfo)
 	}
 }
 
-void 
+void
 comm_point_drop_reply(struct comm_reply* repinfo)
 {
 	if(!repinfo)
@@ -4648,7 +4703,7 @@ comm_point_drop_reply(struct comm_reply* repinfo)
 	reclaim_tcp_handler(repinfo->c);
 }
 
-void 
+void
 comm_point_stop_listening(struct comm_point* c)
 {
 	verbose(VERB_ALGO, "comm point stop listening %d", c->fd);
@@ -4660,10 +4715,10 @@ comm_point_stop_listening(struct comm_point* c)
 	}
 }
 
-void 
+void
 comm_point_start_listening(struct comm_point* c, int newfd, int msec)
 {
-	verbose(VERB_ALGO, "comm point start listening %d (%d msec)", 
+	verbose(VERB_ALGO, "comm point start listening %d (%d msec)",
 		c->fd==-1?newfd:c->fd, msec);
 	if(c->type == comm_tcp_accept && !c->tcp_free) {
 		/* no use to start listening no free slots. */
@@ -4747,10 +4802,10 @@ void comm_point_listen_for_rw(struct comm_point* c, int rd, int wr)
 size_t comm_point_get_mem(struct comm_point* c)
 {
 	size_t s;
-	if(!c) 
+	if(!c)
 		return 0;
 	s = sizeof(*c) + sizeof(*c->ev);
-	if(c->timeout) 
+	if(c->timeout)
 		s += sizeof(*c->timeout);
 	if(c->type == comm_tcp || c->type == comm_local) {
 		s += sizeof(*c->buffer) + sldns_buffer_capacity(c->buffer);
@@ -4769,7 +4824,7 @@ size_t comm_point_get_mem(struct comm_point* c)
 	return s;
 }
 
-struct comm_timer* 
+struct comm_timer*
 comm_timer_create(struct comm_base* base, void (*cb)(void*), void* cb_arg)
 {
 	struct internal_timer *tm = (struct internal_timer*)calloc(1,
@@ -4782,7 +4837,7 @@ comm_timer_create(struct comm_base* base, void (*cb)(void*), void* cb_arg)
 	tm->base = base;
 	tm->super.callback = cb;
 	tm->super.cb_arg = cb_arg;
-	tm->ev = ub_event_new(base->eb->base, -1, UB_EV_TIMEOUT, 
+	tm->ev = ub_event_new(base->eb->base, -1, UB_EV_TIMEOUT,
 		comm_timer_callback, &tm->super);
 	if(tm->ev == NULL) {
 		log_err("timer_create: event_base_set failed.");
@@ -4792,7 +4847,7 @@ comm_timer_create(struct comm_base* base, void (*cb)(void*), void* cb_arg)
 	return &tm->super;
 }
 
-void 
+void
 comm_timer_disable(struct comm_timer* timer)
 {
 	if(!timer)
@@ -4801,7 +4856,7 @@ comm_timer_disable(struct comm_timer* timer)
 	timer->ev_timer->enabled = 0;
 }
 
-void 
+void
 comm_timer_set(struct comm_timer* timer, struct timeval* tv)
 {
 	log_assert(tv);
@@ -4813,7 +4868,7 @@ comm_timer_set(struct comm_timer* timer, struct timeval* tv)
 	timer->ev_timer->enabled = 1;
 }
 
-void 
+void
 comm_timer_delete(struct comm_timer* timer)
 {
 	if(!timer)
@@ -4826,7 +4881,7 @@ comm_timer_delete(struct comm_timer* timer)
 	free(timer->ev_timer);
 }
 
-void 
+void
 comm_timer_callback(int ATTR_UNUSED(fd), short event, void* arg)
 {
 	struct comm_timer* tm = (struct comm_timer*)arg;
@@ -4838,19 +4893,19 @@ comm_timer_callback(int ATTR_UNUSED(fd), short event, void* arg)
 	(*tm->callback)(tm->cb_arg);
 }
 
-int 
+int
 comm_timer_is_set(struct comm_timer* timer)
 {
 	return (int)timer->ev_timer->enabled;
 }
 
-size_t 
+size_t
 comm_timer_get_mem(struct comm_timer* ATTR_UNUSED(timer))
 {
 	return sizeof(struct internal_timer);
 }
 
-struct comm_signal* 
+struct comm_signal*
 comm_signal_create(struct comm_base* base,
         void (*callback)(int, void*), void* cb_arg)
 {
@@ -4867,7 +4922,7 @@ comm_signal_create(struct comm_base* base,
 	return com;
 }
 
-void 
+void
 comm_signal_callback(int sig, short event, void* arg)
 {
 	struct comm_signal* comsig = (struct comm_signal*)arg;
@@ -4878,10 +4933,10 @@ comm_signal_callback(int sig, short event, void* arg)
 	(*comsig->callback)(sig, comsig->cb_arg);
 }
 
-int 
+int
 comm_signal_bind(struct comm_signal* comsig, int sig)
 {
-	struct internal_signal* entry = (struct internal_signal*)calloc(1, 
+	struct internal_signal* entry = (struct internal_signal*)calloc(1,
 		sizeof(struct internal_signal));
 	if(!entry) {
 		log_err("malloc failed");
@@ -4908,7 +4963,7 @@ comm_signal_bind(struct comm_signal* comsig, int sig)
 	return 1;
 }
 
-void 
+void
 comm_signal_delete(struct comm_signal* comsig)
 {
 	struct internal_signal* p, *np;
diff --git a/contrib/unbound/util/netevent.h b/contrib/unbound/util/netevent.h
index 3e7849c13949..dc9619c163b0 100644
--- a/contrib/unbound/util/netevent.h
+++ b/contrib/unbound/util/netevent.h
@@ -4,22 +4,22 @@
  * Copyright (c) 2007, NLnet Labs. All rights reserved.
  *
  * This software is open source.
- * 
+ *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
- * 
+ *
  * Redistributions of source code must retain the above copyright notice,
  * this list of conditions and the following disclaimer.
- * 
+ *
  * Redistributions in binary form must reproduce the above copyright notice,
  * this list of conditions and the following disclaimer in the documentation
  * and/or other materials provided with the distribution.
- * 
+ *
  * Neither the name of the NLNET LABS nor the names of its contributors may
  * be used to endorse or promote products derived from this software without
  * specific prior written permission.
- * 
+ *
  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
@@ -60,6 +60,7 @@
 #ifndef NET_EVENT_H
 #define NET_EVENT_H
 
+#include <sys/time.h>
 #include "dnscrypt/dnscrypt.h"
 #ifdef HAVE_NGHTTP2_NGHTTP2_H
 #include <nghttp2/nghttp2.h>
@@ -83,7 +84,7 @@ struct internal_timer; /* A sub struct of the comm_timer super struct */
 enum listen_type;
 
 /** callback from communication point function type */
-typedef int comm_point_callback_type(struct comm_point*, void*, int, 
+typedef int comm_point_callback_type(struct comm_point*, void*, int,
 	struct comm_reply*);
 
 /** to pass no_error to callback function */
@@ -91,7 +92,7 @@ typedef int comm_point_callback_type(struct comm_point*, void*, int,
 /** to pass closed connection to callback function */
 #define NETEVENT_CLOSED -1
 /** to pass timeout happened to callback function */
-#define NETEVENT_TIMEOUT -2 
+#define NETEVENT_TIMEOUT -2
 /** to pass fallback from capsforID to callback function; 0x20 failed */
 #define NETEVENT_CAPSFAIL -3
 /** to pass done transfer to callback function; http file is complete */
@@ -165,8 +166,8 @@ struct comm_reply {
 	socklen_t client_addrlen;
 };
 
-/** 
- * Communication point to the network 
+/**
+ * Communication point to the network
  * These behaviours can be accomplished by setting the flags
  * and passing return values from the callback.
  *    udp frontside: called after readdone. sendafter.
@@ -206,7 +207,7 @@ struct comm_point {
 	int max_tcp_count;
 	/** current number of tcp handler in-use for this accept socket */
 	int cur_tcp_count;
-	/** malloced array of tcp handlers for a tcp-accept, 
+	/** malloced array of tcp handlers for a tcp-accept,
 	    of size max_tcp_count. */
 	struct comm_point** tcp_handlers;
 	/** linked list of free tcp_handlers to use for new queries.
@@ -271,9 +272,9 @@ struct comm_point {
 	/** is this a UDP, TCP-accept or TCP socket. */
 	enum comm_point_type {
 		/** UDP socket - handle datagrams. */
-		comm_udp, 
+		comm_udp,
 		/** TCP accept socket - only creates handlers if readable. */
-		comm_tcp_accept, 
+		comm_tcp_accept,
 		/** TCP handler socket - handle byteperbyte readwrite. */
 		comm_tcp,
 		/** HTTP handler socket */
@@ -282,7 +283,7 @@ struct comm_point {
 		comm_local,
 		/** raw - not DNS format - for pipe readers and writers */
 		comm_raw
-	} 
+	}
 		/** variable with type of socket, UDP,TCP-accept,TCP,pipe */
 		type;
 
@@ -303,7 +304,7 @@ struct comm_point {
 	/** if set the connection is NOT closed on delete. */
 	int do_not_close;
 
-	/** if set, the connection is closed on error, on timeout, 
+	/** if set, the connection is closed on error, on timeout,
 	    and after read/write completes. No callback is done. */
 	int tcp_do_close;
 
@@ -383,15 +384,16 @@ struct comm_point {
 	/** number of queries outstanding on this socket, used by
 	 * outside network for udp ports */
 	int inuse;
-
+	/** the timestamp when the packet was received by the kernel */
+	struct timeval recv_tv;
 	/** callback when done.
 	    tcp_accept does not get called back, is NULL then.
 	    If a timeout happens, callback with timeout=1 is called.
-	    If an error happens, callback is called with error set 
+	    If an error happens, callback is called with error set
 	    nonzero. If not NETEVENT_NOERROR, it is an errno value.
 	    If the connection is closed (by remote end) then the
 	    callback is called with error set to NETEVENT_CLOSED=-1.
-	    If a timeout happens on the connection, the error is set to 
+	    If a timeout happens on the connection, the error is set to
 	    NETEVENT_TIMEOUT=-2.
 	    The reply_info can be copied if the reply needs to happen at a
 	    later time. It consists of a struct with commpoint and address.
@@ -399,7 +401,7 @@ struct comm_point {
 	    Note the reply information is temporary and must be copied.
 	    NULL is passed for_reply info, in cases where error happened.
 
-	    declare as: 
+	    declare as:
 	    int my_callback(struct comm_point* c, void* my_arg, int error,
 		struct comm_reply *reply_info);
 
@@ -446,14 +448,14 @@ struct comm_signal {
 
 /**
  * Create a new comm base.
- * @param sigs: if true it attempts to create a default loop for 
+ * @param sigs: if true it attempts to create a default loop for
  *   signal handling.
  * @return: the new comm base. NULL on error.
  */
 struct comm_base* comm_base_create(int sigs);
 
 /**
- * Create comm base that uses the given ub_event_base (underlying pluggable 
+ * Create comm base that uses the given ub_event_base (underlying pluggable
  * event mechanism pointer).
  * @param base: underlying pluggable event base.
  * @return: the new comm base. NULL on error.
@@ -619,7 +621,7 @@ struct comm_point* comm_point_create_http_out(struct comm_base* base,
  * @return: the commpoint or NULL on error.
  */
 struct comm_point* comm_point_create_local(struct comm_base* base,
-	int fd, size_t bufsize, 
+	int fd, size_t bufsize,
 	comm_point_callback_type* callback, void* callback_arg);
 
 /**
@@ -632,7 +634,7 @@ struct comm_point* comm_point_create_local(struct comm_base* base,
  * @return: the commpoint or NULL on error.
  */
 struct comm_point* comm_point_create_raw(struct comm_base* base,
-	int fd, int writing, 
+	int fd, int writing,
 	comm_point_callback_type* callback, void* callback_arg);
 
 /**
@@ -722,7 +724,7 @@ size_t comm_point_get_mem(struct comm_point* c);
  * @param cb_arg: user callback argument.
  * @return: the new timer or NULL on error.
  */
-struct comm_timer* comm_timer_create(struct comm_base* base, 
+struct comm_timer* comm_timer_create(struct comm_base* base,
 	void (*cb)(void*), void* cb_arg);
 
 /**
@@ -792,7 +794,7 @@ void comm_signal_delete(struct comm_signal* comsig);
  *	if -1, error message has been printed if necessary, simply drop
  *	out of the reading handler.
  */
-int comm_point_perform_accept(struct comm_point* c, 
+int comm_point_perform_accept(struct comm_point* c,
 	struct sockaddr_storage* addr, socklen_t* addrlen);
 
 /**** internal routines ****/
@@ -801,7 +803,7 @@ int comm_point_perform_accept(struct comm_point* c,
  * This routine is published for checks and tests, and is only used internally.
  * handle libevent callback for udp comm point.
  * @param fd: file descriptor.
- * @param event: event bits from libevent: 
+ * @param event: event bits from libevent:
  *	EV_READ, EV_WRITE, EV_SIGNAL, EV_TIMEOUT.
  * @param arg: the comm_point structure.
  */
@@ -811,7 +813,7 @@ void comm_point_udp_callback(int fd, short event, void* arg);
  * This routine is published for checks and tests, and is only used internally.
  * handle libevent callback for udp ancillary data comm point.
  * @param fd: file descriptor.
- * @param event: event bits from libevent: 
+ * @param event: event bits from libevent:
  *	EV_READ, EV_WRITE, EV_SIGNAL, EV_TIMEOUT.
  * @param arg: the comm_point structure.
  */
@@ -821,7 +823,7 @@ void comm_point_udp_ancil_callback(int fd, short event, void* arg);
  * This routine is published for checks and tests, and is only used internally.
  * handle libevent callback for tcp accept comm point
  * @param fd: file descriptor.
- * @param event: event bits from libevent: 
+ * @param event: event bits from libevent:
  *	EV_READ, EV_WRITE, EV_SIGNAL, EV_TIMEOUT.
  * @param arg: the comm_point structure.
  */
@@ -831,7 +833,7 @@ void comm_point_tcp_accept_callback(int fd, short event, void* arg);
  * This routine is published for checks and tests, and is only used internally.
  * handle libevent callback for tcp data comm point
  * @param fd: file descriptor.
- * @param event: event bits from libevent: 
+ * @param event: event bits from libevent:
  *	EV_READ, EV_WRITE, EV_SIGNAL, EV_TIMEOUT.
  * @param arg: the comm_point structure.
  */
@@ -841,7 +843,7 @@ void comm_point_tcp_handle_callback(int fd, short event, void* arg);
  * This routine is published for checks and tests, and is only used internally.
  * handle libevent callback for tcp data comm point
  * @param fd: file descriptor.
- * @param event: event bits from libevent: 
+ * @param event: event bits from libevent:
  *	EV_READ, EV_WRITE, EV_SIGNAL, EV_TIMEOUT.
  * @param arg: the comm_point structure.
  */
@@ -955,7 +957,7 @@ void http2_stream_add_meshstate(struct http2_stream* h2_stream,
  * This routine is published for checks and tests, and is only used internally.
  * handle libevent callback for timer comm.
  * @param fd: file descriptor (always -1).
- * @param event: event bits from libevent: 
+ * @param event: event bits from libevent:
  *	EV_READ, EV_WRITE, EV_SIGNAL, EV_TIMEOUT.
  * @param arg: the comm_timer structure.
  */
@@ -965,7 +967,7 @@ void comm_timer_callback(int fd, short event, void* arg);
  * This routine is published for checks and tests, and is only used internally.
  * handle libevent callback for signal comm.
  * @param fd: file descriptor (used for the signal number).
- * @param event: event bits from libevent: 
+ * @param event: event bits from libevent:
  *	EV_READ, EV_WRITE, EV_SIGNAL, EV_TIMEOUT.
  * @param arg: the internal commsignal structure.
  */
@@ -975,7 +977,7 @@ void comm_signal_callback(int fd, short event, void* arg);
  * This routine is published for checks and tests, and is only used internally.
  * libevent callback for AF_UNIX fds
  * @param fd: file descriptor.
- * @param event: event bits from libevent: 
+ * @param event: event bits from libevent:
  *	EV_READ, EV_WRITE, EV_SIGNAL, EV_TIMEOUT.
  * @param arg: the comm_point structure.
  */
@@ -985,7 +987,7 @@ void comm_point_local_handle_callback(int fd, short event, void* arg);
  * This routine is published for checks and tests, and is only used internally.
  * libevent callback for raw fd access.
  * @param fd: file descriptor.
- * @param event: event bits from libevent: 
+ * @param event: event bits from libevent:
  *	EV_READ, EV_WRITE, EV_SIGNAL, EV_TIMEOUT.
  * @param arg: the comm_point structure.
  */
@@ -995,7 +997,7 @@ void comm_point_raw_handle_callback(int fd, short event, void* arg);
  * This routine is published for checks and tests, and is only used internally.
  * libevent callback for timeout on slow accept.
  * @param fd: file descriptor.
- * @param event: event bits from libevent: 
+ * @param event: event bits from libevent:
  *	EV_READ, EV_WRITE, EV_SIGNAL, EV_TIMEOUT.
  * @param arg: the comm_point structure.
  */
diff --git a/contrib/unbound/util/regional.c b/contrib/unbound/util/regional.c
index 93e911c5ec1a..44aee68b2023 100644
--- a/contrib/unbound/util/regional.c
+++ b/contrib/unbound/util/regional.c
@@ -186,7 +186,7 @@ regional_alloc_init(struct regional* r, const void *init, size_t size)
 {
 	void *s = regional_alloc(r, size);
 	if(!s) return NULL;
-	memcpy(s, init, size);
+	memmove(s, init, size);
 	return s;
 }
 
diff --git a/contrib/unbound/util/rfc_1982.c b/contrib/unbound/util/rfc_1982.c
new file mode 100644
index 000000000000..c28deded606b
--- /dev/null
+++ b/contrib/unbound/util/rfc_1982.c
@@ -0,0 +1,74 @@
+/*
+ * util/rfc_1982.c - RFC 1982 Serial Number Arithmetic
+ *
+ * Copyright (c) 2023, NLnet Labs. All rights reserved.
+ *
+ * This software is open source.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * Redistributions of source code must retain the above copyright notice,
+ * this list of conditions and the following disclaimer.
+ *
+ * Redistributions in binary form must reproduce the above copyright notice,
+ * this list of conditions and the following disclaimer in the documentation
+ * and/or other materials provided with the distribution.
+ *
+ * Neither the name of the NLNET LABS nor the names of its contributors may
+ * be used to endorse or promote products derived from this software without
+ * specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
+ * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/**
+ * \file
+ *
+ * This file contains functions for RFC 1982 serial number arithmetic.
+ */
+#include "config.h"
+
+int
+compare_1982(uint32_t a, uint32_t b)
+{
+	/* for 32 bit values */
+	const uint32_t cutoff = ((uint32_t) 1 << (32 - 1));
+
+	if (a == b) {
+		return 0;
+	} else if ((a < b && b - a < cutoff) || (a > b && a - b > cutoff)) {
+		return -1;
+	} else {
+		return 1;
+	}
+}
+
+uint32_t
+subtract_1982(uint32_t a, uint32_t b)
+{
+	/* for 32 bit values */
+	const uint32_t cutoff = ((uint32_t) 1 << (32 - 1));
+
+	if(a == b)
+		return 0;
+	if(a < b && b - a < cutoff) {
+		return b-a;
+	}
+	if(a > b && a - b > cutoff) {
+		return ((uint32_t)0xffffffff) - (a-b-1);
+	}
+	/* wrong case, b smaller than a */
+	return 0;
+}
diff --git a/contrib/unbound/util/rfc_1982.h b/contrib/unbound/util/rfc_1982.h
new file mode 100644
index 000000000000..bae383d0e010
--- /dev/null
+++ b/contrib/unbound/util/rfc_1982.h
@@ -0,0 +1,63 @@
+/*
+ * util/rfc_1982.h - RFC 1982 Serial Number Arithmetic
+ *
+ * Copyright (c) 2023, NLnet Labs. All rights reserved.
+ *
+ * This software is open source.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * Redistributions of source code must retain the above copyright notice,
+ * this list of conditions and the following disclaimer.
+ *
+ * Redistributions in binary form must reproduce the above copyright notice,
+ * this list of conditions and the following disclaimer in the documentation
+ * and/or other materials provided with the distribution.
+ *
+ * Neither the name of the NLNET LABS nor the names of its contributors may
+ * be used to endorse or promote products derived from this software without
+ * specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
+ * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/**
+ * \file
+ *
+ * This file contains functions for RFC 1982 serial number arithmetic.
+ */
+#ifndef RFC_1982_H
+#define RFC_1982_H
+
+/**
+ * RFC 1982 comparison, uses unsigned integers, and tries to avoid
+ * compiler optimization (eg. by avoiding a-b<0 comparisons).
+ * @param a: value to compare.
+ * @param b: value to compare.
+ * @return 0 if equal, 1 if a > b, else -1.
+ */
+int compare_1982(uint32_t a, uint32_t b);
+
+/**
+ * RFC 1982 subtraction, uses unsigned integers, and tries to avoid
+ * compiler optimization (eg. by avoiding a-b<0 comparisons).
+ * @param a: value to subtract from.
+ * @param b: value to subtract.
+ * @return the difference between them if we know that b is larger than a,
+ *	that is the distance between them in serial number arithmetic.
+ */
+uint32_t subtract_1982(uint32_t a, uint32_t b);
+
+#endif /* RFC_1982_H */
diff --git a/contrib/unbound/util/siphash.c b/contrib/unbound/util/siphash.c
new file mode 100644
index 000000000000..0e1b597d0523
--- /dev/null
+++ b/contrib/unbound/util/siphash.c
@@ -0,0 +1,187 @@
+/*
+   SipHash reference C implementation
+
+   Copyright (c) 2012-2016 Jean-Philippe Aumasson
+   <jeanphilippe.aumasson@gmail.com>
+   Copyright (c) 2012-2014 Daniel J. Bernstein <djb@cr.yp.to>
+
+   To the extent possible under law, the author(s) have dedicated all copyright
+   and related and neighboring rights to this software to the public domain
+   worldwide. This software is distributed without any warranty.
+
+   You should have received a copy of the CC0 Public Domain Dedication along
+   with
+   this software. If not, see
+   <http://creativecommons.org/publicdomain/zero/1.0/>.
+ */
+/**
+ * Edited slightly for integration in Unbound. Edits are noted with 'EDIT'.
+ */
+/** EDIT
+ * \#include <assert.h>
+ * \#include <stdint.h>
+ * \#include <stdio.h>
+ * \#include <string.h>
+ * Replaced the above includes with Unbound's config.h
+ */
+#include "config.h"
+
+/* default: SipHash-2-4 */
+#define cROUNDS 2
+#define dROUNDS 4
+
+#define ROTL(x, b) (uint64_t)(((x) << (b)) | ((x) >> (64 - (b))))
+
+#define U32TO8_LE(p, v)                                                        \
+    (p)[0] = (uint8_t)((v));                                                   \
+    (p)[1] = (uint8_t)((v) >> 8);                                              \
+    (p)[2] = (uint8_t)((v) >> 16);                                             \
+    (p)[3] = (uint8_t)((v) >> 24);
+
+#define U64TO8_LE(p, v)                                                        \
+    U32TO8_LE((p), (uint32_t)((v)));                                           \
+    U32TO8_LE((p) + 4, (uint32_t)((v) >> 32));
+
+#define U8TO64_LE(p)                                                           \
+    (((uint64_t)((p)[0])) | ((uint64_t)((p)[1]) << 8) |                        \
+     ((uint64_t)((p)[2]) << 16) | ((uint64_t)((p)[3]) << 24) |                 \
+     ((uint64_t)((p)[4]) << 32) | ((uint64_t)((p)[5]) << 40) |                 \
+     ((uint64_t)((p)[6]) << 48) | ((uint64_t)((p)[7]) << 56))
+
+#define SIPROUND                                                               \
+    do {                                                                       \
+        v0 += v1;                                                              \
+        v1 = ROTL(v1, 13);                                                     \
+        v1 ^= v0;                                                              \
+        v0 = ROTL(v0, 32);                                                     \
+        v2 += v3;                                                              \
+        v3 = ROTL(v3, 16);                                                     \
+        v3 ^= v2;                                                              \
+        v0 += v3;                                                              \
+        v3 = ROTL(v3, 21);                                                     \
+        v3 ^= v0;                                                              \
+        v2 += v1;                                                              \
+        v1 = ROTL(v1, 17);                                                     \
+        v1 ^= v2;                                                              \
+        v2 = ROTL(v2, 32);                                                     \
+    } while (0)
+
+#ifdef DEBUG
+#define TRACE                                                                  \
+    do {                                                                       \
+        printf("(%3d) v0 %08x %08x\n", (int)inlen, (uint32_t)(v0 >> 32),       \
+               (uint32_t)v0);                                                  \
+        printf("(%3d) v1 %08x %08x\n", (int)inlen, (uint32_t)(v1 >> 32),       \
+               (uint32_t)v1);                                                  \
+        printf("(%3d) v2 %08x %08x\n", (int)inlen, (uint32_t)(v2 >> 32),       \
+               (uint32_t)v2);                                                  \
+        printf("(%3d) v3 %08x %08x\n", (int)inlen, (uint32_t)(v3 >> 32),       \
+               (uint32_t)v3);                                                  \
+    } while (0)
+#else
+#define TRACE
+#endif
+
+int siphash(const uint8_t *in, const size_t inlen, const uint8_t *k,
+            uint8_t *out, const size_t outlen) {
+
+    uint64_t v0 = 0x736f6d6570736575ULL;
+    uint64_t v1 = 0x646f72616e646f6dULL;
+    uint64_t v2 = 0x6c7967656e657261ULL;
+    uint64_t v3 = 0x7465646279746573ULL;
+    uint64_t k0 = U8TO64_LE(k);
+    uint64_t k1 = U8TO64_LE(k + 8);
+    uint64_t m;
+    int i;
+    const uint8_t *end = in + inlen - (inlen % sizeof(uint64_t));
+    const int left = inlen & 7;
+    uint64_t b = ((uint64_t)inlen) << 56;
+    /** EDIT
+     * The following assert moved here from the top for C90 compliance.
+     */
+    assert((outlen == 8) || (outlen == 16));
+    v3 ^= k1;
+    v2 ^= k0;
+    v1 ^= k1;
+    v0 ^= k0;
+
+    if (outlen == 16)
+        v1 ^= 0xee;
+
+    for (; in != end; in += 8) {
+        m = U8TO64_LE(in);
+        v3 ^= m;
+
+        TRACE;
+        for (i = 0; i < cROUNDS; ++i)
+            SIPROUND;
+
+        v0 ^= m;
+    }
+
+    switch (left) {
+    case 7:
+        b |= ((uint64_t)in[6]) << 48;
+        /** EDIT annotate case statement fallthrough for gcc */
+        /* fallthrough */
+    case 6:
+        b |= ((uint64_t)in[5]) << 40;
+        /** EDIT annotate case statement fallthrough for gcc */
+        /* fallthrough */
+    case 5:
+        b |= ((uint64_t)in[4]) << 32;
+        /** EDIT annotate case statement fallthrough for gcc */
+        /* fallthrough */
+    case 4:
+        b |= ((uint64_t)in[3]) << 24;
+        /** EDIT annotate case statement fallthrough for gcc */
+        /* fallthrough */
+    case 3:
+        b |= ((uint64_t)in[2]) << 16;
+        /** EDIT annotate case statement fallthrough for gcc */
+        /* fallthrough */
+    case 2:
+        b |= ((uint64_t)in[1]) << 8;
+        /** EDIT annotate case statement fallthrough for gcc */
+        /* fallthrough */
+    case 1:
+        b |= ((uint64_t)in[0]);
+        break;
+    case 0:
+        break;
+    }
+
+    v3 ^= b;
+
+    TRACE;
+    for (i = 0; i < cROUNDS; ++i)
+        SIPROUND;
+
+    v0 ^= b;
+
+    if (outlen == 16)
+        v2 ^= 0xee;
+    else
+        v2 ^= 0xff;
+
+    TRACE;
+    for (i = 0; i < dROUNDS; ++i)
+        SIPROUND;
+
+    b = v0 ^ v1 ^ v2 ^ v3;
+    U64TO8_LE(out, b);
+
+    if (outlen == 8)
+        return 0;
+
+    v1 ^= 0xdd;
+
+    TRACE;
+    for (i = 0; i < dROUNDS; ++i)
+        SIPROUND;
+
+    b = v0 ^ v1 ^ v2 ^ v3;
+    U64TO8_LE(out + 8, b);
+
+    return 0;
+}
diff --git a/contrib/unbound/util/siphash.h b/contrib/unbound/util/siphash.h
new file mode 100644
index 000000000000..63da2175cabb
--- /dev/null
+++ b/contrib/unbound/util/siphash.h
@@ -0,0 +1,43 @@
+/*
+ * util/siphash.h - header for SipHash reference C implementation.
+ *
+ * Copyright (c) 2023, NLnet Labs. All rights reserved.
+ *
+ * This software is open source.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * Redistributions of source code must retain the above copyright notice,
+ * this list of conditions and the following disclaimer.
+ *
+ * Redistributions in binary form must reproduce the above copyright notice,
+ * this list of conditions and the following disclaimer in the documentation
+ * and/or other materials provided with the distribution.
+ *
+ * Neither the name of the NLNET LABS nor the names of its contributors may
+ * be used to endorse or promote products derived from this software without
+ * specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
+ * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+/**
+ * \file
+ * Contains the SipHash reference C implementation.
+ */
+#ifndef UTIL_SIPHASH_H
+#define UTIL_SIPHASH_H
+int siphash(const uint8_t *in, const size_t inlen, const uint8_t *k,
+            uint8_t *out, const size_t outlen);
+#endif /* UTIL_SIPHASH_H */
diff --git a/contrib/unbound/util/storage/lruhash.c b/contrib/unbound/util/storage/lruhash.c
index 3500a4ef0fe8..e17b180db8b8 100644
--- a/contrib/unbound/util/storage/lruhash.c
+++ b/contrib/unbound/util/storage/lruhash.c
@@ -81,6 +81,7 @@ lruhash_create(size_t start_size, size_t maxmem,
 	table->num = 0;
 	table->space_used = 0;
 	table->space_max = maxmem;
+	table->max_collisions = 0;
 	table->array = calloc(table->size, sizeof(struct lruhash_bin));
 	if(!table->array) {
 		lock_quick_destroy(&table->lock);
@@ -216,15 +217,19 @@ reclaim_space(struct lruhash* table, struct lruhash_entry** list)
 
 struct lruhash_entry* 
 bin_find_entry(struct lruhash* table, 
-	struct lruhash_bin* bin, hashvalue_type hash, void* key)
+	struct lruhash_bin* bin, hashvalue_type hash, void* key, size_t* collisions)
 {
+	size_t c = 0;
 	struct lruhash_entry* p = bin->overflow_list;
 	while(p) {
 		if(p->hash == hash && table->compfunc(p->key, key) == 0)
-			return p;
+			break;
+		c++;
 		p = p->overflow_next;
 	}
-	return NULL;
+	if (collisions != NULL)
+		*collisions = c;
+	return p;
 }
 
 void 
@@ -303,6 +308,7 @@ lruhash_insert(struct lruhash* table, hashvalue_type hash,
 	struct lruhash_bin* bin;
 	struct lruhash_entry* found, *reclaimlist=NULL;
 	size_t need_size;
+	size_t collisions;
 	fptr_ok(fptr_whitelist_hash_sizefunc(table->sizefunc));
 	fptr_ok(fptr_whitelist_hash_delkeyfunc(table->delkeyfunc));
 	fptr_ok(fptr_whitelist_hash_deldatafunc(table->deldatafunc));
@@ -317,12 +323,14 @@ lruhash_insert(struct lruhash* table, hashvalue_type hash,
 	lock_quick_lock(&bin->lock);
 
 	/* see if entry exists already */
-	if(!(found=bin_find_entry(table, bin, hash, entry->key))) {
+	if(!(found=bin_find_entry(table, bin, hash, entry->key, &collisions))) {
 		/* if not: add to bin */
 		entry->overflow_next = bin->overflow_list;
 		bin->overflow_list = entry;
 		lru_front(table, entry);
 		table->num++;
+		if (table->max_collisions < collisions)
+			table->max_collisions = collisions;
 		table->space_used += need_size;
 	} else {
 		/* if so: update data - needs a writelock */
@@ -362,7 +370,7 @@ lruhash_lookup(struct lruhash* table, hashvalue_type hash, void* key, int wr)
 	lock_quick_lock(&table->lock);
 	bin = &table->array[hash & table->size_mask];
 	lock_quick_lock(&bin->lock);
-	if((entry=bin_find_entry(table, bin, hash, key)))
+	if((entry=bin_find_entry(table, bin, hash, key, NULL)))
 		lru_touch(table, entry);
 	lock_quick_unlock(&table->lock);
 
@@ -389,7 +397,7 @@ lruhash_remove(struct lruhash* table, hashvalue_type hash, void* key)
 	lock_quick_lock(&table->lock);
 	bin = &table->array[hash & table->size_mask];
 	lock_quick_lock(&bin->lock);
-	if((entry=bin_find_entry(table, bin, hash, key))) {
+	if((entry=bin_find_entry(table, bin, hash, key, NULL))) {
 		bin_overflow_remove(bin, entry);
 		lru_remove(table, entry);
 	} else {
@@ -579,6 +587,7 @@ lruhash_insert_or_retrieve(struct lruhash* table, hashvalue_type hash,
 	struct lruhash_bin* bin;
 	struct lruhash_entry* found, *reclaimlist = NULL;
 	size_t need_size;
+	size_t collisions;
 	fptr_ok(fptr_whitelist_hash_sizefunc(table->sizefunc));
 	fptr_ok(fptr_whitelist_hash_delkeyfunc(table->delkeyfunc));
 	fptr_ok(fptr_whitelist_hash_deldatafunc(table->deldatafunc));
@@ -593,7 +602,7 @@ lruhash_insert_or_retrieve(struct lruhash* table, hashvalue_type hash,
 	lock_quick_lock(&bin->lock);
 
 	/* see if entry exists already */
-	if ((found = bin_find_entry(table, bin, hash, entry->key)) != NULL) {
+	if ((found = bin_find_entry(table, bin, hash, entry->key, &collisions)) != NULL) {
 		/* if so: keep the existing data - acquire a writelock */
 		lock_rw_wrlock(&found->lock);
 	}
@@ -604,6 +613,8 @@ lruhash_insert_or_retrieve(struct lruhash* table, hashvalue_type hash,
 		bin->overflow_list = entry;
 		lru_front(table, entry);
 		table->num++;
+		if (table->max_collisions < collisions)
+			table->max_collisions = collisions;
 		table->space_used += need_size;
 		/* return the entry that was presented, and lock it */
 		found = entry;
diff --git a/contrib/unbound/util/storage/lruhash.h b/contrib/unbound/util/storage/lruhash.h
index 4759b5001231..2086e4dec93e 100644
--- a/contrib/unbound/util/storage/lruhash.h
+++ b/contrib/unbound/util/storage/lruhash.h
@@ -178,6 +178,8 @@ struct lruhash {
 	size_t space_used;
 	/** the amount of space the hash table is maximally allowed to use. */
 	size_t space_max;
+	/** the maximum collisions were detected during the lruhash_insert operations. */
+	size_t max_collisions;
 };
 
 /**
@@ -357,10 +359,11 @@ void bin_delete(struct lruhash* table, struct lruhash_bin* bin);
  * @param bin: hash bin to look into.
  * @param hash: hash value to look for.
  * @param key: key to look for.
+ * @param collisions: how many collisions were found during the search.
  * @return: the entry or NULL if not found.
  */
 struct lruhash_entry* bin_find_entry(struct lruhash* table, 
-	struct lruhash_bin* bin, hashvalue_type hash, void* key);
+	struct lruhash_bin* bin, hashvalue_type hash, void* key, size_t* collisions);
 
 /**
  * Remove entry from bin overflow chain.
diff --git a/contrib/unbound/util/storage/slabhash.c b/contrib/unbound/util/storage/slabhash.c
index a6c3d0fa6490..7d376c4d684a 100644
--- a/contrib/unbound/util/storage/slabhash.c
+++ b/contrib/unbound/util/storage/slabhash.c
@@ -242,3 +242,21 @@ size_t count_slabhash_entries(struct slabhash* sh)
 	}
 	return cnt;
 }
+
+void get_slabhash_stats(struct slabhash* sh, long long* num, long long* collisions)
+{
+	size_t slab, cnt = 0, max_collisions = 0;
+
+	for(slab=0; slab<sh->size; slab++) {
+		lock_quick_lock(&sh->array[slab]->lock);
+		cnt += sh->array[slab]->num;
+		if (max_collisions < sh->array[slab]->max_collisions) {
+			max_collisions = sh->array[slab]->max_collisions;
+		}
+		lock_quick_unlock(&sh->array[slab]->lock);
+	}
+	if (num != NULL)
+		*num = cnt;
+	if (collisions != NULL)
+		*collisions = max_collisions;
+}
diff --git a/contrib/unbound/util/storage/slabhash.h b/contrib/unbound/util/storage/slabhash.h
index 4ecb60421678..dc5fc3603294 100644
--- a/contrib/unbound/util/storage/slabhash.h
+++ b/contrib/unbound/util/storage/slabhash.h
@@ -200,6 +200,15 @@ void slabhash_traverse(struct slabhash* table, int wr,
  */
 size_t count_slabhash_entries(struct slabhash* table);
 
+/**
+ * Retrieves number of items in slabhash and the current max collision level
+ * @param table: slabbed hash table.
+ * @param entries_count: where to save the current number of elements.
+ * @param max_collisions: where to save the current max collisions level.
+ */
+void get_slabhash_stats(struct slabhash* table,
+	long long* entries_count, long long* max_collisions);
+
 /* --- test representation --- */
 /** test structure contains test key */
 struct slabhash_testkey {
diff --git a/contrib/unbound/util/timehist.c b/contrib/unbound/util/timehist.c
index 61cc995fd8ef..2063fe80eead 100644
--- a/contrib/unbound/util/timehist.c
+++ b/contrib/unbound/util/timehist.c
@@ -4,22 +4,22 @@
  * Copyright (c) 2007, NLnet Labs. All rights reserved.
  *
  * This software is open source.
- * 
+ *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
- * 
+ *
  * Redistributions of source code must retain the above copyright notice,
  * this list of conditions and the following disclaimer.
- * 
+ *
  * Redistributions in binary form must reproduce the above copyright notice,
  * this list of conditions and the following disclaimer in the documentation
  * and/or other materials provided with the distribution.
- * 
+ *
  * Neither the name of the NLNET LABS nor the names of its contributors may
  * be used to endorse or promote products derived from this software without
  * specific prior written permission.
- * 
+ *
  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
@@ -46,6 +46,7 @@
 #include <sys/types.h>
 #include "util/timehist.h"
 #include "util/log.h"
+#include "util/timeval_func.h"
 
 /** special timestwo operation for time values in histogram setup */
 static void
@@ -83,12 +84,12 @@ dosetup(struct timehist* hist)
 
 struct timehist* timehist_setup(void)
 {
-	struct timehist* hist = (struct timehist*)calloc(1, 
+	struct timehist* hist = (struct timehist*)calloc(1,
 		sizeof(struct timehist));
 	if(!hist)
 		return NULL;
 	hist->num = NUM_BUCKETS_HIST;
-	hist->buckets = (struct th_buck*)calloc(hist->num, 
+	hist->buckets = (struct th_buck*)calloc(hist->num,
 		sizeof(struct th_buck));
 	if(!hist->buckets) {
 		free(hist);
@@ -114,23 +115,6 @@ void timehist_clear(struct timehist* hist)
 		hist->buckets[i].count = 0;
 }
 
-/** histogram compare of time values */
-static int
-timeval_smaller(const struct timeval* x, const struct timeval* y)
-{
-#ifndef S_SPLINT_S
-	if(x->tv_sec < y->tv_sec)
-		return 1;
-	else if(x->tv_sec == y->tv_sec) {
-		if(x->tv_usec <= y->tv_usec)
-			return 1;
-		else	return 0;
-	}
-	else	return 0;
-#endif
-}
-
-
 void timehist_insert(struct timehist* hist, struct timeval* tv)
 {
 	size_t i;
@@ -194,7 +178,7 @@ timehist_count(struct timehist* hist)
 	return res;
 }
 
-double 
+double
 timehist_quartile(struct timehist* hist, double q)
 {
 	double lookfor, passed, res;
@@ -209,22 +193,22 @@ timehist_quartile(struct timehist* hist, double q)
 	lookfor *= q;
 	passed = 0;
 	i = 0;
-	while(i+1 < hist->num && 
+	while(i+1 < hist->num &&
 		passed+(double)hist->buckets[i].count < lookfor) {
 		passed += (double)hist->buckets[i++].count;
 	}
 	/* got the right bucket */
 #ifndef S_SPLINT_S
-	low = (double)hist->buckets[i].lower.tv_sec + 
+	low = (double)hist->buckets[i].lower.tv_sec +
 		(double)hist->buckets[i].lower.tv_usec/1000000.;
-	up = (double)hist->buckets[i].upper.tv_sec + 
+	up = (double)hist->buckets[i].upper.tv_sec +
 		(double)hist->buckets[i].upper.tv_usec/1000000.;
 #endif
 	res = (lookfor - passed)*(up-low)/((double)hist->buckets[i].count);
 	return low+res;
 }
 
-void 
+void
 timehist_export(struct timehist* hist, long long* array, size_t sz)
 {
 	size_t i;
@@ -235,7 +219,7 @@ timehist_export(struct timehist* hist, long long* array, size_t sz)
 		array[i] = (long long)hist->buckets[i].count;
 }
 
-void 
+void
 timehist_import(struct timehist* hist, long long* array, size_t sz)
 {
 	size_t i;
diff --git a/contrib/unbound/util/timeval_func.c b/contrib/unbound/util/timeval_func.c
new file mode 100644
index 000000000000..90250e153d90
--- /dev/null
+++ b/contrib/unbound/util/timeval_func.c
@@ -0,0 +1,113 @@
+/*
+ * util/timeval_func.c - helpers to work with struct timeval values.
+ *
+ * Copyright (c) 2023, NLnet Labs. All rights reserved.
+ *
+ * This software is open source.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * Redistributions of source code must retain the above copyright notice,
+ * this list of conditions and the following disclaimer.
+ *
+ * Redistributions in binary form must reproduce the above copyright notice,
+ * this list of conditions and the following disclaimer in the documentation
+ * and/or other materials provided with the distribution.
+ *
+ * Neither the name of the NLNET LABS nor the names of its contributors may
+ * be used to endorse or promote products derived from this software without
+ * specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
+ * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/**
+ * \file
+ *
+ * This file contains helpers to manipulate struct timeval values.
+ */
+
+#include "config.h"
+#include "timeval_func.h"
+
+/** subtract timers and the values do not overflow or become negative */
+void
+timeval_subtract(struct timeval* d, const struct timeval* end, const struct timeval* start)
+{
+#ifndef S_SPLINT_S
+	time_t end_usec = end->tv_usec;
+	d->tv_sec = end->tv_sec - start->tv_sec;
+	if(end_usec < start->tv_usec) {
+		end_usec += 1000000;
+		d->tv_sec--;
+	}
+	d->tv_usec = end_usec - start->tv_usec;
+#endif
+}
+
+/** add timers and the values do not overflow or become negative */
+void
+timeval_add(struct timeval* d, const struct timeval* add)
+{
+#ifndef S_SPLINT_S
+	d->tv_sec += add->tv_sec;
+	d->tv_usec += add->tv_usec;
+	if(d->tv_usec >= 1000000 ) {
+		d->tv_usec -= 1000000;
+		d->tv_sec++;
+	}
+#endif
+}
+
+/** divide sum of timers to get average */
+void
+timeval_divide(struct timeval* avg, const struct timeval* sum, long long d)
+{
+#ifndef S_SPLINT_S
+	long long leftover;
+	if(d <= 0) {
+		avg->tv_sec = 0;
+		avg->tv_usec = 0;
+		return;
+	}
+	avg->tv_sec = sum->tv_sec / d;
+	avg->tv_usec = sum->tv_usec / d;
+	/* handle fraction from seconds divide */
+	leftover = sum->tv_sec - avg->tv_sec*d;
+	if(leftover <= 0)
+		leftover = 0;
+	avg->tv_usec += (((long long)leftover)*((long long)1000000))/d;
+	if(avg->tv_sec < 0)
+		avg->tv_sec = 0;
+	if(avg->tv_usec < 0)
+		avg->tv_usec = 0;
+#endif
+}
+
+/** histogram compare of time values */
+int
+timeval_smaller(const struct timeval* x, const struct timeval* y)
+{
+#ifndef S_SPLINT_S
+	if(x->tv_sec < y->tv_sec)
+		return 1;
+	else if(x->tv_sec == y->tv_sec) {
+		if(x->tv_usec <= y->tv_usec)
+			return 1;
+		else	return 0;
+	}
+	else	return 0;
+#endif
+}
diff --git a/contrib/unbound/util/timeval_func.h b/contrib/unbound/util/timeval_func.h
new file mode 100644
index 000000000000..819d1dd80fb7
--- /dev/null
+++ b/contrib/unbound/util/timeval_func.h
@@ -0,0 +1,53 @@
+/*
+ * util/timeval_func.h - definitions of helpers for struct timeval values.
+ *
+ * Copyright (c) 2023, NLnet Labs. All rights reserved.
+ *
+ * This software is open source.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * Redistributions of source code must retain the above copyright notice,
+ * this list of conditions and the following disclaimer.
+ *
+ * Redistributions in binary form must reproduce the above copyright notice,
+ * this list of conditions and the following disclaimer in the documentation
+ * and/or other materials provided with the distribution.
+ *
+ * Neither the name of the NLNET LABS nor the names of its contributors may
+ * be used to endorse or promote products derived from this software without
+ * specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
+ * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/**
+ * \file
+ *
+ * This file contains definitions of helpers to manipulate struct timeval
+ * values, implemented in the corresponding C file.
+ */
+#include <sys/time.h>
+
+#ifndef timeval_isset
+#define timeval_isset(tv) ((tv)->tv_sec || (tv)->tv_usec)
+#endif
+#ifndef timeval_clear
+#define timeval_clear(tv) ((tv)->tv_sec = (tv)->tv_usec = 0)
+#endif
+void timeval_subtract(struct timeval* d, const struct timeval* end, const struct timeval* start);
+void timeval_add(struct timeval* d, const struct timeval* add);
+void timeval_divide(struct timeval* avg, const struct timeval* sum, long long d);
+int timeval_smaller(const struct timeval* x, const struct timeval* y);
diff --git a/contrib/unbound/validator/autotrust.c b/contrib/unbound/validator/autotrust.c
index 3cdf9ceae851..3011a0ace7a2 100644
--- a/contrib/unbound/validator/autotrust.c
+++ b/contrib/unbound/validator/autotrust.c
@@ -2376,6 +2376,8 @@ probe_anchor(struct module_env* env, struct trust_anchor* tp)
 	edns.opt_list_out = NULL;
 	edns.opt_list_inplace_cb_out = NULL;
 	edns.padding_block_size = 0;
+	edns.cookie_present = 0;
+	edns.cookie_valid = 0;
 	if(sldns_buffer_capacity(buf) < 65535)
 		edns.udp_size = (uint16_t)sldns_buffer_capacity(buf);
 	else	edns.udp_size = 65535;
diff --git a/contrib/unbound/validator/val_kcache.c b/contrib/unbound/validator/val_kcache.c
index c190085b56ff..f5d49d24f2db 100644
--- a/contrib/unbound/validator/val_kcache.c
+++ b/contrib/unbound/validator/val_kcache.c
@@ -81,17 +81,11 @@ key_cache_delete(struct key_cache* kcache)
 
 void 
 key_cache_insert(struct key_cache* kcache, struct key_entry_key* kkey,
-	struct module_qstate* qstate)
+	int copy_reason)
 {
-	struct key_entry_key* k = key_entry_copy(kkey);
+	struct key_entry_key* k = key_entry_copy(kkey, copy_reason);
 	if(!k)
 		return;
-	if(key_entry_isbad(k) && qstate->errinf &&
-		qstate->env->cfg->val_log_level >= 2) {
-		/* on malloc failure there is simply no reason string */
-		key_entry_set_reason(k, errinf_to_str_bogus(qstate));
-		key_entry_set_reason_bogus(k, errinf_to_reason_bogus(qstate));
-	}
 	key_entry_hash(k);
 	slabhash_insert(kcache->slab, k->entry.hash, &k->entry, 
 		k->entry.data, NULL);
diff --git a/contrib/unbound/validator/val_kcache.h b/contrib/unbound/validator/val_kcache.h
index 76c9dd094d1a..df8de0999b3f 100644
--- a/contrib/unbound/validator/val_kcache.h
+++ b/contrib/unbound/validator/val_kcache.h
@@ -76,10 +76,10 @@ void key_cache_delete(struct key_cache* kcache);
  * @param kcache: the key cache.
  * @param kkey: key entry key, assumed malloced in a region, is copied
  * 	to perform update or insertion. Its data pointer is also copied.
- * @param qstate: store errinf reason in case its bad.
+ * @param copy_reason: if the reason string needs to be copied (allocated).
  */
 void key_cache_insert(struct key_cache* kcache, struct key_entry_key* kkey,
-	struct module_qstate* qstate);
+	int copy_reason);
 
 /**
  * Remove an entry from the key cache.
diff --git a/contrib/unbound/validator/val_kentry.c b/contrib/unbound/validator/val_kentry.c
index a47feba61a9f..85f026402fa3 100644
--- a/contrib/unbound/validator/val_kentry.c
+++ b/contrib/unbound/validator/val_kentry.c
@@ -152,7 +152,7 @@ key_entry_copy_toregion(struct key_entry_key* kkey, struct regional* region)
 }
 
 struct key_entry_key* 
-key_entry_copy(struct key_entry_key* kkey)
+key_entry_copy(struct key_entry_key* kkey, int copy_reason)
 {
 	struct key_entry_key* newk;
 	if(!kkey)
@@ -190,7 +190,7 @@ key_entry_copy(struct key_entry_key* kkey)
 			}
 			packed_rrset_ptr_fixup(newd->rrset_data);
 		}
-		if(d->reason) {
+		if(copy_reason && d->reason && *d->reason != 0) {
 			newd->reason = strdup(d->reason);
 			if(!newd->reason) {
 				free(newd->rrset_data);
@@ -199,6 +199,8 @@ key_entry_copy(struct key_entry_key* kkey)
 				free(newk);
 				return NULL;
 			}
+		} else {
+			newd->reason = NULL;
 		}
 		if(d->algo) {
 			newd->algo = (uint8_t*)strdup((char*)d->algo);
@@ -237,22 +239,6 @@ key_entry_isbad(struct key_entry_key* kkey)
 	return (int)(d->isbad);
 }
 
-void
-key_entry_set_reason(struct key_entry_key* kkey, char* reason)
-{
-	struct key_entry_data* d = (struct key_entry_data*)kkey->entry.data;
-	d->reason = reason;
-}
-
-void
-key_entry_set_reason_bogus(struct key_entry_key* kkey, sldns_ede_code ede)
-{
-	struct key_entry_data* d = (struct key_entry_data*)kkey->entry.data;
-	if (ede != LDNS_EDE_NONE) { /* reason_bogus init is LDNS_EDE_NONE already */
-		d->reason_bogus = ede;
-	}
-}
-
 char*
 key_entry_get_reason(struct key_entry_key* kkey)
 {
@@ -294,6 +280,7 @@ key_entry_setup(struct regional* region,
 struct key_entry_key* 
 key_entry_create_null(struct regional* region,
 	uint8_t* name, size_t namelen, uint16_t dclass, time_t ttl,
+	sldns_ede_code reason_bogus, const char* reason,
 	time_t now)
 {
 	struct key_entry_key* k;
@@ -302,8 +289,10 @@ key_entry_create_null(struct regional* region,
 		return NULL;
 	d->ttl = now + ttl;
 	d->isbad = 0;
-	d->reason = NULL;
-	d->reason_bogus = LDNS_EDE_NONE;
+	d->reason = (!reason || *reason == 0)
+		?NULL :(char*)regional_strdup(region, reason);
+		/* On allocation error we don't store the reason string */
+	d->reason_bogus = reason_bogus;
 	d->rrset_type = LDNS_RR_TYPE_DNSKEY;
 	d->rrset_data = NULL;
 	d->algo = NULL;
@@ -313,7 +302,9 @@ key_entry_create_null(struct regional* region,
 struct key_entry_key* 
 key_entry_create_rrset(struct regional* region,
 	uint8_t* name, size_t namelen, uint16_t dclass,
-	struct ub_packed_rrset_key* rrset, uint8_t* sigalg, time_t now)
+	struct ub_packed_rrset_key* rrset, uint8_t* sigalg,
+	sldns_ede_code reason_bogus, const char* reason,
+	time_t now)
 {
 	struct key_entry_key* k;
 	struct key_entry_data* d;
@@ -323,8 +314,10 @@ key_entry_create_rrset(struct regional* region,
 		return NULL;
 	d->ttl = rd->ttl + now;
 	d->isbad = 0;
-	d->reason = NULL;
-	d->reason_bogus = LDNS_EDE_NONE;
+	d->reason = (!reason || *reason == 0)
+		?NULL :(char*)regional_strdup(region, reason);
+		/* On allocation error we don't store the reason string */
+	d->reason_bogus = reason_bogus;
 	d->rrset_type = ntohs(rrset->rk.type);
 	d->rrset_data = (struct packed_rrset_data*)regional_alloc_init(region,
 		rd, packed_rrset_sizeof(rd));
@@ -341,7 +334,8 @@ key_entry_create_rrset(struct regional* region,
 
 struct key_entry_key* 
 key_entry_create_bad(struct regional* region,
-	uint8_t* name, size_t namelen, uint16_t dclass, time_t ttl, 
+	uint8_t* name, size_t namelen, uint16_t dclass, time_t ttl,
+	sldns_ede_code reason_bogus, const char* reason,
 	time_t now)
 {
 	struct key_entry_key* k;
@@ -350,8 +344,10 @@ key_entry_create_bad(struct regional* region,
 		return NULL;
 	d->ttl = now + ttl;
 	d->isbad = 1;
-	d->reason = NULL;
-	d->reason_bogus = LDNS_EDE_NONE;
+	d->reason = (!reason || *reason == 0)
+		?NULL :(char*)regional_strdup(region, reason);
+		/* On allocation error we don't store the reason string */
+	d->reason_bogus = reason_bogus;
 	d->rrset_type = LDNS_RR_TYPE_DNSKEY;
 	d->rrset_data = NULL;
 	d->algo = NULL;
diff --git a/contrib/unbound/validator/val_kentry.h b/contrib/unbound/validator/val_kentry.h
index ded45beaa71d..ca9f0dabceb2 100644
--- a/contrib/unbound/validator/val_kentry.h
+++ b/contrib/unbound/validator/val_kentry.h
@@ -120,9 +120,11 @@ struct key_entry_key* key_entry_copy_toregion(struct key_entry_key* kkey,
 /**
  * Copy a key entry, malloced.
  * @param kkey: the key entry key (and data pointer) to copy.
+ * @param copy_reason: if the reason string needs to be copied (allocated).
  * @return newly allocated entry or NULL on a failure to allocate memory.
  */
-struct key_entry_key* key_entry_copy(struct key_entry_key* kkey);
+struct key_entry_key* key_entry_copy(struct key_entry_key* kkey,
+	int copy_reason);
 
 /**
  * See if this is a null entry. Does not do locking.
@@ -146,23 +148,6 @@ int key_entry_isgood(struct key_entry_key* kkey);
 int key_entry_isbad(struct key_entry_key* kkey);
 
 /**
- * Set reason why a key is bad.
- * @param kkey: bad key.
- * @param reason: string to attach, you must allocate it.
- *    Not safe to call twice unless you deallocate it yourself.
- */
-void key_entry_set_reason(struct key_entry_key* kkey, char* reason);
-
-/**
- * Set the EDE (RFC8914) code why the key is bad, if it
- * exists (so not LDNS_EDE_NONE).
- * @param kkey: bad key.
- * @param ede: EDE code to attach to this key.
- */
-void key_entry_set_reason_bogus(struct key_entry_key* kkey, sldns_ede_code ede);
-
-
-/**
  * Get reason why a key is bad.
  * @param kkey: bad key
  * @return pointer to string.
@@ -184,11 +169,14 @@ sldns_ede_code key_entry_get_reason_bogus(struct key_entry_key* kkey);
  * @param namelen: length of name
  * @param dclass: class of key entry. (host order);
  * @param ttl: what ttl should the key have. relative.
+ * @param reason_bogus: accompanying EDE code.
+ * @param reason: accompanying NULL-terminated EDE string (or NULL).
  * @param now: current time (added to ttl).
  * @return new key entry or NULL on alloc failure
  */
 struct key_entry_key* key_entry_create_null(struct regional* region,
-	uint8_t* name, size_t namelen, uint16_t dclass, time_t ttl, 
+	uint8_t* name, size_t namelen, uint16_t dclass, time_t ttl,
+	sldns_ede_code reason_bogus, const char* reason,
 	time_t now);
 
 /**
@@ -199,12 +187,16 @@ struct key_entry_key* key_entry_create_null(struct regional* region,
  * @param dclass: class of key entry. (host order);
  * @param rrset: data for key entry. This is copied to the region.
  * @param sigalg: signalled algorithm list (or NULL).
+ * @param reason_bogus: accompanying EDE code (usually LDNS_EDE_NONE).
+ * @param reason: accompanying NULL-terminated EDE string (or NULL).
  * @param now: current time (added to ttl of rrset)
  * @return new key entry or NULL on alloc failure
  */
 struct key_entry_key* key_entry_create_rrset(struct regional* region,
-        uint8_t* name, size_t namelen, uint16_t dclass, 
-	struct ub_packed_rrset_key* rrset, uint8_t* sigalg, time_t now);
+	uint8_t* name, size_t namelen, uint16_t dclass,
+	struct ub_packed_rrset_key* rrset, uint8_t* sigalg,
+	sldns_ede_code reason_bogus, const char* reason,
+	time_t now);
 
 /**
  * Create a bad entry, in the given region.
@@ -213,11 +205,14 @@ struct key_entry_key* key_entry_create_rrset(struct regional* region,
  * @param namelen: length of name
  * @param dclass: class of key entry. (host order);
  * @param ttl: what ttl should the key have. relative.
+ * @param reason_bogus: accompanying EDE code.
+ * @param reason: accompanying NULL-terminated EDE string (or NULL).
  * @param now: current time (added to ttl).
  * @return new key entry or NULL on alloc failure
  */
 struct key_entry_key* key_entry_create_bad(struct regional* region,
 	uint8_t* name, size_t namelen, uint16_t dclass, time_t ttl,
+	sldns_ede_code reason_bogus, const char* reason,
 	time_t now);
 
 /**
diff --git a/contrib/unbound/validator/val_neg.c b/contrib/unbound/validator/val_neg.c
index 67699b1f7c1e..52bc68387260 100644
--- a/contrib/unbound/validator/val_neg.c
+++ b/contrib/unbound/validator/val_neg.c
@@ -43,7 +43,7 @@
  */
 #include "config.h"
 #ifdef HAVE_OPENSSL_SSL_H
-#include "openssl/ssl.h"
+#include <openssl/ssl.h>
 #define NSEC3_SHA_LEN SHA_DIGEST_LENGTH
 #else
 #define NSEC3_SHA_LEN 20
@@ -1407,6 +1407,11 @@ val_neg_getmsg(struct val_neg_cache* neg, struct query_info* qinfo,
 	/* Matching NSEC, use to generate No Data answer. Not creating answers
 	 * yet for No Data proven using wildcard. */
 	if(nsec && nsec_proves_nodata(nsec, qinfo, &nodata_wc) && !nodata_wc) {
+		/* do not create nodata answers for qtype ANY, it is a query
+		 * type, not an rrtype to disprove. Nameerrors are useful for
+		 * qtype ANY, in the else branch. */
+		if(qinfo->qtype == LDNS_RR_TYPE_ANY)
+			return NULL;
 		if(!(msg = dns_msg_create(qinfo->qname, qinfo->qname_len, 
 			qinfo->qtype, qinfo->qclass, region, 2))) 
 			return NULL;
diff --git a/contrib/unbound/validator/val_nsec.c b/contrib/unbound/validator/val_nsec.c
index 876bfab6dbbd..17c90d83f594 100644
--- a/contrib/unbound/validator/val_nsec.c
+++ b/contrib/unbound/validator/val_nsec.c
@@ -174,9 +174,10 @@ val_nsec_proves_no_ds(struct ub_packed_rrset_key* nsec,
 
 /** check security status from cache or verify rrset, returns true if secure */
 static int
-nsec_verify_rrset(struct module_env* env, struct val_env* ve, 
-	struct ub_packed_rrset_key* nsec, struct key_entry_key* kkey, 
-	char** reason, struct module_qstate* qstate)
+nsec_verify_rrset(struct module_env* env, struct val_env* ve,
+	struct ub_packed_rrset_key* nsec, struct key_entry_key* kkey,
+	char** reason, sldns_ede_code* reason_bogus,
+	struct module_qstate* qstate)
 {
 	struct packed_rrset_data* d = (struct packed_rrset_data*)
 		nsec->entry.data;
@@ -187,7 +188,7 @@ nsec_verify_rrset(struct module_env* env, struct val_env* ve,
 	if(d->security == sec_status_secure)
 		return 1;
 	d->security = val_verify_rrset_entry(env, ve, nsec, kkey, reason,
-		NULL, LDNS_SECTION_AUTHORITY, qstate);
+		reason_bogus, LDNS_SECTION_AUTHORITY, qstate);
 	if(d->security == sec_status_secure) {
 		rrset_update_sec_status(env->rrset_cache, nsec, *env->now);
 		return 1;
@@ -199,7 +200,7 @@ enum sec_status
 val_nsec_prove_nodata_dsreply(struct module_env* env, struct val_env* ve, 
 	struct query_info* qinfo, struct reply_info* rep, 
 	struct key_entry_key* kkey, time_t* proof_ttl, char** reason,
-	struct module_qstate* qstate)
+	sldns_ede_code* reason_bogus, struct module_qstate* qstate)
 {
 	struct ub_packed_rrset_key* nsec = reply_find_rrset_section_ns(
 		rep, qinfo->qname, qinfo->qname_len, LDNS_RR_TYPE_NSEC, 
@@ -216,7 +217,8 @@ val_nsec_prove_nodata_dsreply(struct module_env* env, struct val_env* ve,
 	 * 1) this is a delegation point and there is no DS
 	 * 2) this is not a delegation point */
 	if(nsec) {
-		if(!nsec_verify_rrset(env, ve, nsec, kkey, reason, qstate)) {
+		if(!nsec_verify_rrset(env, ve, nsec, kkey, reason,
+			reason_bogus, qstate)) {
 			verbose(VERB_ALGO, "NSEC RRset for the "
 				"referral did not verify.");
 			return sec_status_bogus;
@@ -225,6 +227,7 @@ val_nsec_prove_nodata_dsreply(struct module_env* env, struct val_env* ve,
 		if(sec == sec_status_bogus) {
 			/* something was wrong. */
 			*reason = "NSEC does not prove absence of DS";
+			*reason_bogus = LDNS_EDE_DNSSEC_BOGUS;
 			return sec;
 		} else if(sec == sec_status_insecure) {
 			/* this wasn't a delegation point. */
@@ -246,9 +249,11 @@ val_nsec_prove_nodata_dsreply(struct module_env* env, struct val_env* ve,
 		if(rep->rrsets[i]->rk.type != htons(LDNS_RR_TYPE_NSEC))
 			continue;
 		if(!nsec_verify_rrset(env, ve, rep->rrsets[i], kkey, reason,
-			qstate)) {
+			reason_bogus, qstate)) {
 			verbose(VERB_ALGO, "NSEC for empty non-terminal "
 				"did not verify.");
+			*reason = "NSEC for empty non-terminal "
+				"did not verify.";
 			return sec_status_bogus;
 		}
 		if(nsec_proves_nodata(rep->rrsets[i], qinfo, &wc)) {
diff --git a/contrib/unbound/validator/val_nsec.h b/contrib/unbound/validator/val_nsec.h
index 7117809d60ae..81844c908e54 100644
--- a/contrib/unbound/validator/val_nsec.h
+++ b/contrib/unbound/validator/val_nsec.h
@@ -44,6 +44,7 @@
 #ifndef VALIDATOR_VAL_NSEC_H
 #define VALIDATOR_VAL_NSEC_H
 #include "util/data/packed_rrset.h"
+#include "sldns/rrdef.h"
 struct val_env;
 struct module_env;
 struct module_qstate;
@@ -65,6 +66,7 @@ struct key_entry_key;
  * @param kkey: key entry to use for verification of signatures.
  * @param proof_ttl: if secure, the TTL of how long this proof lasts.
  * @param reason: string explaining why bogus.
+ * @param reason_bogus: relevant EDE code for validation failure.
  * @param qstate: qstate with region.
  * @return security status.
  *	SECURE: proved absence of DS.
@@ -75,7 +77,8 @@ struct key_entry_key;
 enum sec_status val_nsec_prove_nodata_dsreply(struct module_env* env,
 	struct val_env* ve, struct query_info* qinfo, 
 	struct reply_info* rep, struct key_entry_key* kkey,
-	time_t* proof_ttl, char** reason, struct module_qstate* qstate);
+	time_t* proof_ttl, char** reason, sldns_ede_code* reason_bogus,
+	struct module_qstate* qstate);
 
 /** 
  * nsec typemap check, takes an NSEC-type bitmap as argument, checks for type.
diff --git a/contrib/unbound/validator/val_sigcrypt.c b/contrib/unbound/validator/val_sigcrypt.c
index 5ab21e20e735..37730f179676 100644
--- a/contrib/unbound/validator/val_sigcrypt.c
+++ b/contrib/unbound/validator/val_sigcrypt.c
@@ -48,6 +48,7 @@
 #include "util/data/msgparse.h"
 #include "util/data/dname.h"
 #include "util/rbtree.h"
+#include "util/rfc_1982.h"
 #include "util/module.h"
 #include "util/net_help.h"
 #include "util/regional.h"
@@ -718,9 +719,9 @@ dnskey_verify_rrset(struct module_env* env, struct val_env* ve,
 	}
 	verbose(VERB_ALGO, "rrset failed to verify: all signatures are bogus");
 	if(!numchecked) {
-		*reason = "signature missing";
+		*reason = "signature for expected key and algorithm missing";
 		if(reason_bogus)
-			*reason_bogus = LDNS_EDE_RRSIGS_MISSING;
+			*reason_bogus = LDNS_EDE_DNSSEC_BOGUS;
 	} else if(numchecked == numindeterminate) {
 		verbose(VERB_ALGO, "rrset failed to verify due to algorithm "
 			"refusal by cryptolib");
@@ -1378,44 +1379,6 @@ sigdate_error(const char* str, int32_t expi, int32_t incep, int32_t now)
 			(unsigned)incep, (unsigned)now);
 }
 
-/** RFC 1982 comparison, uses unsigned integers, and tries to avoid
- * compiler optimization (eg. by avoiding a-b<0 comparisons),
- * this routine matches compare_serial(), for SOA serial number checks */
-static int
-compare_1982(uint32_t a, uint32_t b)
-{
-	/* for 32 bit values */
-        const uint32_t cutoff = ((uint32_t) 1 << (32 - 1));
-
-        if (a == b) {
-                return 0;
-        } else if ((a < b && b - a < cutoff) || (a > b && a - b > cutoff)) {
-                return -1;
-        } else {
-                return 1;
-        }
-}
-
-/** if we know that b is larger than a, return the difference between them,
- * that is the distance between them. in RFC1982 arith */
-static uint32_t
-subtract_1982(uint32_t a, uint32_t b)
-{
-	/* for 32 bit values */
-        const uint32_t cutoff = ((uint32_t) 1 << (32 - 1));
-
-	if(a == b)
-		return 0;
-	if(a < b && b - a < cutoff) {
-		return b-a;
-	}
-	if(a > b && a - b > cutoff) {
-		return ((uint32_t)0xffffffff) - (a-b-1);
-	}
-	/* wrong case, b smaller than a */
-	return 0;
-}
-
 /** check rrsig dates */
 static int
 check_dates(struct val_env* ve, uint32_t unow, uint8_t* expi_p,
diff --git a/contrib/unbound/validator/val_utils.c b/contrib/unbound/validator/val_utils.c
index e2319ee2399d..8b388882b82a 100644
--- a/contrib/unbound/validator/val_utils.c
+++ b/contrib/unbound/validator/val_utils.c
@@ -587,16 +587,18 @@ val_verify_new_DNSKEYs(struct regional* region, struct module_env* env,
 		return key_entry_create_rrset(region, 
 			ds_rrset->rk.dname, ds_rrset->rk.dname_len,
 			ntohs(ds_rrset->rk.rrset_class), dnskey_rrset,
-			downprot?sigalg:NULL, *env->now);
+			downprot?sigalg:NULL, LDNS_EDE_NONE, NULL,
+			*env->now);
 	} else if(sec == sec_status_insecure) {
 		return key_entry_create_null(region, ds_rrset->rk.dname,
-			ds_rrset->rk.dname_len, 
+			ds_rrset->rk.dname_len,
 			ntohs(ds_rrset->rk.rrset_class),
-			rrset_get_ttl(ds_rrset), *env->now);
+			rrset_get_ttl(ds_rrset), *reason_bogus, *reason,
+			*env->now);
 	}
 	return key_entry_create_bad(region, ds_rrset->rk.dname,
 		ds_rrset->rk.dname_len, ntohs(ds_rrset->rk.rrset_class),
-		BOGUS_KEY_TTL, *env->now);
+		BOGUS_KEY_TTL, *reason_bogus, *reason, *env->now);
 }
 
 enum sec_status
@@ -694,7 +696,7 @@ val_verify_DNSKEY_with_TA(struct module_env* env, struct val_env* ve,
 		has_useful_ta = 1;
 
 		sec = dnskey_verify_rrset(env, ve, dnskey_rrset,
-			ta_dnskey, i, reason, NULL, LDNS_SECTION_ANSWER, qstate);
+			ta_dnskey, i, reason, reason_bogus, LDNS_SECTION_ANSWER, qstate);
 		if(sec == sec_status_secure) {
 			if(!sigalg || algo_needs_set_secure(&needs,
 				(uint8_t)dnskey_get_algo(ta_dnskey, i))) {
@@ -743,16 +745,17 @@ val_verify_new_DNSKEYs_with_ta(struct regional* region, struct module_env* env,
 		return key_entry_create_rrset(region,
 			dnskey_rrset->rk.dname, dnskey_rrset->rk.dname_len,
 			ntohs(dnskey_rrset->rk.rrset_class), dnskey_rrset,
-			downprot?sigalg:NULL, *env->now);
+			downprot?sigalg:NULL, LDNS_EDE_NONE, NULL, *env->now);
 	} else if(sec == sec_status_insecure) {
 		return key_entry_create_null(region, dnskey_rrset->rk.dname,
 			dnskey_rrset->rk.dname_len,
 			ntohs(dnskey_rrset->rk.rrset_class),
-			rrset_get_ttl(dnskey_rrset), *env->now);
+			rrset_get_ttl(dnskey_rrset), *reason_bogus, *reason,
+			*env->now);
 	}
 	return key_entry_create_bad(region, dnskey_rrset->rk.dname,
 		dnskey_rrset->rk.dname_len, ntohs(dnskey_rrset->rk.rrset_class),
-		BOGUS_KEY_TTL, *env->now);
+		BOGUS_KEY_TTL, *reason_bogus, *reason, *env->now);
 }
 
 int
diff --git a/contrib/unbound/validator/validator.c b/contrib/unbound/validator/validator.c
index 1723afefe353..9de9d54db27c 100644
--- a/contrib/unbound/validator/validator.c
+++ b/contrib/unbound/validator/validator.c
@@ -70,16 +70,16 @@ static void process_ds_response(struct module_qstate* qstate,
 	struct query_info* qinfo, struct sock_list* origin);
 
 
-/* Updates the suplied EDE (RFC8914) code selectively so we don't loose
- * a more specific code
- */
+/* Updates the suplied EDE (RFC8914) code selectively so we don't lose
+ * a more specific code */
 static void
 update_reason_bogus(struct reply_info* rep, sldns_ede_code reason_bogus)
 {
-	if (rep->reason_bogus == LDNS_EDE_DNSSEC_BOGUS ||
-		rep->reason_bogus == LDNS_EDE_NONE) {
-		rep->reason_bogus = reason_bogus;
-	}
+	if(reason_bogus == LDNS_EDE_NONE) return;
+	if(reason_bogus == LDNS_EDE_DNSSEC_BOGUS
+		&& rep->reason_bogus != LDNS_EDE_NONE
+		&& rep->reason_bogus != LDNS_EDE_DNSSEC_BOGUS) return;
+	rep->reason_bogus = reason_bogus;
 }
 
 
@@ -1672,20 +1672,13 @@ processInit(struct module_qstate* qstate, struct val_qstate* vq,
 		vq->state = VAL_FINISHED_STATE;
 		return 1;
 	} else if(key_entry_isbad(vq->key_entry)) {
-		sldns_ede_code ede = LDNS_EDE_DNSSEC_BOGUS;
-
-		/* the key could have a more spefic EDE than just bogus */
-		if(key_entry_get_reason_bogus(vq->key_entry) != LDNS_EDE_NONE) {
-			ede = key_entry_get_reason_bogus(vq->key_entry);
-		}
-
+		/* Bad keys should have the relevant EDE code and text */
+		sldns_ede_code ede = key_entry_get_reason_bogus(vq->key_entry);
 		/* key is bad, chain is bad, reply is bogus */
 		errinf_dname(qstate, "key for validation", vq->key_entry->name);
 		errinf_ede(qstate, "is marked as invalid", ede);
-		if(key_entry_get_reason(vq->key_entry)) {
-			errinf(qstate, "because of a previous");
-			errinf(qstate, key_entry_get_reason(vq->key_entry));
-		}
+		errinf(qstate, "because of a previous");
+		errinf(qstate, key_entry_get_reason(vq->key_entry));
 
 		/* no retries, stop bothering the authority until timeout */
 		vq->restart_count = ve->max_restart;
@@ -1888,7 +1881,8 @@ processValidate(struct module_qstate* qstate, struct val_qstate* vq,
 		vq->chase_reply->security = sec_status_insecure;
 		val_mark_insecure(vq->chase_reply, vq->key_entry->name, 
 			qstate->env->rrset_cache, qstate->env);
-		key_cache_insert(ve->kcache, vq->key_entry, qstate);
+		key_cache_insert(ve->kcache, vq->key_entry,
+			qstate->env->cfg->val_log_level >= 2);
 		return 1;
 	}
 
@@ -1897,12 +1891,13 @@ processValidate(struct module_qstate* qstate, struct val_qstate* vq,
 			"of trust to keys for", vq->key_entry->name,
 			LDNS_RR_TYPE_DNSKEY, vq->key_entry->key_class);
 		vq->chase_reply->security = sec_status_bogus;
-
-		update_reason_bogus(vq->chase_reply, LDNS_EDE_DNSKEY_MISSING);
+		update_reason_bogus(vq->chase_reply,
+			key_entry_get_reason_bogus(vq->key_entry));
 		errinf_ede(qstate, "while building chain of trust",
-			LDNS_EDE_DNSKEY_MISSING);
+			key_entry_get_reason_bogus(vq->key_entry));
 		if(vq->restart_count >= ve->max_restart)
-			key_cache_insert(ve->kcache, vq->key_entry, qstate);
+			key_cache_insert(ve->kcache, vq->key_entry,
+				qstate->env->cfg->val_log_level >= 2);
 		return 1;
 	}
 
@@ -2151,9 +2146,19 @@ processFinished(struct module_qstate* qstate, struct val_qstate* vq,
 				log_query_info(NO_VERBOSE, "validation failure",
 					&qstate->qinfo);
 			else {
-				char* err = errinf_to_str_bogus(qstate);
-				if(err) log_info("%s", err);
-				free(err);
+				char* err_str = errinf_to_str_bogus(qstate);
+				if(err_str) {
+					size_t err_str_len = strlen(err_str);
+					log_info("%s", err_str);
+					/* allocate space and store the error
+					 * string */
+					vq->orig_msg->rep->reason_bogus_str = regional_alloc(
+						qstate->region,
+						sizeof(char) * (err_str_len+1));
+					memcpy(vq->orig_msg->rep->reason_bogus_str,
+						err_str, err_str_len+1);
+				}
+				free(err_str);
 			}
 		}
 		/*
@@ -2195,6 +2200,9 @@ processFinished(struct module_qstate* qstate, struct val_qstate* vq,
 			}
 		}
 	}
+
+	/* Update rep->reason_bogus as it is the one being cached */
+	update_reason_bogus(vq->orig_msg->rep, errinf_to_reason_bogus(qstate));
 	/* store results in cache */
 	if(qstate->query_flags&BIT_RD) {
 		/* if secure, this will override cache anyway, no need
@@ -2370,13 +2378,17 @@ primeResponseToKE(struct ub_packed_rrset_key* dnskey_rrset,
 		log_nametypeclass(VERB_OPS, "failed to prime trust anchor -- "
 			"could not fetch DNSKEY rrset", 
 			ta->name, LDNS_RR_TYPE_DNSKEY, ta->dclass);
+		reason_bogus = LDNS_EDE_DNSKEY_MISSING;
+		reason = "no DNSKEY rrset";
 		if(qstate->env->cfg->harden_dnssec_stripped) {
-			errinf_ede(qstate, "no DNSKEY rrset", LDNS_EDE_DNSKEY_MISSING);
+			errinf_ede(qstate, reason, reason_bogus);
 			kkey = key_entry_create_bad(qstate->region, ta->name,
 				ta->namelen, ta->dclass, BOGUS_KEY_TTL,
+				reason_bogus, reason,
 				*qstate->env->now);
 		} else 	kkey = key_entry_create_null(qstate->region, ta->name,
 				ta->namelen, ta->dclass, NULL_KEY_TTL,
+				reason_bogus, reason,
 				*qstate->env->now);
 		if(!kkey) {
 			log_err("out of memory: allocate fail prime key");
@@ -2409,9 +2421,11 @@ primeResponseToKE(struct ub_packed_rrset_key* dnskey_rrset,
 			errinf_ede(qstate, reason, reason_bogus);
 			kkey = key_entry_create_bad(qstate->region, ta->name,
 				ta->namelen, ta->dclass, BOGUS_KEY_TTL,
+				reason_bogus, reason,
 				*qstate->env->now);
 		} else 	kkey = key_entry_create_null(qstate->region, ta->name,
 				ta->namelen, ta->dclass, NULL_KEY_TTL,
+				reason_bogus, reason,
 				*qstate->env->now);
 		if(!kkey) {
 			log_err("out of memory: allocate null prime key");
@@ -2458,8 +2472,9 @@ ds_response_to_ke(struct module_qstate* qstate, struct val_qstate* vq,
 		/* errors here pretty much break validation */
 		verbose(VERB_DETAIL, "DS response was error, thus bogus");
 		errinf(qstate, rc);
-		errinf_ede(qstate, "no DS", LDNS_EDE_NETWORK_ERROR);
-
+		reason = "no DS";
+		reason_bogus = LDNS_EDE_NETWORK_ERROR;
+		errinf_ede(qstate, reason, reason_bogus);
 		goto return_bogus;
 	}
 
@@ -2473,7 +2488,8 @@ ds_response_to_ke(struct module_qstate* qstate, struct val_qstate* vq,
 		if(!ds) {
 			log_warn("internal error: POSITIVE DS response was "
 				"missing DS.");
-			errinf_ede(qstate, "no DS record", LDNS_EDE_DNSSEC_BOGUS);
+			reason = "no DS record";
+			errinf_ede(qstate, reason, reason_bogus);
 			goto return_bogus;
 		}
 		/* Verify only returns BOGUS or SECURE. If the rrset is 
@@ -2492,13 +2508,11 @@ ds_response_to_ke(struct module_qstate* qstate, struct val_qstate* vq,
 		if(!val_dsset_isusable(ds)) {
 			/* If they aren't usable, then we treat it like 
 			 * there was no DS. */
-
-			/* TODO add EDE Unsupported DS Digest Type; this needs
-			 * EDE to be added on non SERVFAIL answers. */
-
-			*ke = key_entry_create_null(qstate->region, 
-				qinfo->qname, qinfo->qname_len, qinfo->qclass, 
-				ub_packed_rrset_ttl(ds), *qstate->env->now);
+			*ke = key_entry_create_null(qstate->region,
+				qinfo->qname, qinfo->qname_len, qinfo->qclass,
+				ub_packed_rrset_ttl(ds),
+				LDNS_EDE_UNSUPPORTED_DS_DIGEST, NULL,
+				*qstate->env->now);
 			return (*ke) != NULL;
 		}
 
@@ -2506,7 +2520,7 @@ ds_response_to_ke(struct module_qstate* qstate, struct val_qstate* vq,
 		log_query_info(VERB_DETAIL, "validated DS", qinfo);
 		*ke = key_entry_create_rrset(qstate->region,
 			qinfo->qname, qinfo->qname_len, qinfo->qclass, ds,
-			NULL, *qstate->env->now);
+			NULL, LDNS_EDE_NONE, NULL, *qstate->env->now);
 		return (*ke) != NULL;
 	} else if(subtype == VAL_CLASS_NODATA || 
 		subtype == VAL_CLASS_NAMEERROR) {
@@ -2518,7 +2532,8 @@ ds_response_to_ke(struct module_qstate* qstate, struct val_qstate* vq,
 		/* make sure there are NSECs or NSEC3s with signatures */
 		if(!val_has_signed_nsecs(msg->rep, &reason)) {
 			verbose(VERB_ALGO, "no NSECs: %s", reason);
-			errinf_ede(qstate, reason, LDNS_EDE_NSEC_MISSING);
+			reason_bogus = LDNS_EDE_NSEC_MISSING;
+			errinf_ede(qstate, reason, reason_bogus);
 			goto return_bogus;
 		}
 
@@ -2530,7 +2545,7 @@ ds_response_to_ke(struct module_qstate* qstate, struct val_qstate* vq,
 		/* Try to prove absence of the DS with NSEC */
 		sec = val_nsec_prove_nodata_dsreply(
 			qstate->env, ve, qinfo, msg->rep, vq->key_entry, 
-			&proof_ttl, &reason, qstate);
+			&proof_ttl, &reason, &reason_bogus, qstate);
 		switch(sec) {
 			case sec_status_secure:
 				verbose(VERB_DETAIL, "NSEC RRset for the "
@@ -2538,6 +2553,7 @@ ds_response_to_ke(struct module_qstate* qstate, struct val_qstate* vq,
 				*ke = key_entry_create_null(qstate->region, 
 					qinfo->qname, qinfo->qname_len, 
 					qinfo->qclass, proof_ttl,
+					LDNS_EDE_NONE, NULL,
 					*qstate->env->now);
 				return (*ke) != NULL;
 			case sec_status_insecure:
@@ -2571,6 +2587,7 @@ ds_response_to_ke(struct module_qstate* qstate, struct val_qstate* vq,
 				*ke = key_entry_create_null(qstate->region, 
 					qinfo->qname, qinfo->qname_len, 
 					qinfo->qclass, proof_ttl,
+					LDNS_EDE_NONE, NULL,
 					*qstate->env->now);
 				return (*ke) != NULL;
 			case sec_status_indeterminate:
@@ -2593,7 +2610,8 @@ ds_response_to_ke(struct module_qstate* qstate, struct val_qstate* vq,
 		 * this is BOGUS. */
 		verbose(VERB_DETAIL, "DS %s ran out of options, so return "
 			"bogus", val_classification_to_string(subtype));
-		errinf(qstate, "no DS but also no proof of that");
+		reason = "no DS but also no proof of that";
+		errinf_ede(qstate, reason, reason_bogus);
 		goto return_bogus;
 	} else if(subtype == VAL_CLASS_CNAME || 
 		subtype == VAL_CLASS_CNAMENOANSWER) {
@@ -2605,22 +2623,25 @@ ds_response_to_ke(struct module_qstate* qstate, struct val_qstate* vq,
 		cname = reply_find_rrset_section_an(msg->rep, qinfo->qname,
 			qinfo->qname_len, LDNS_RR_TYPE_CNAME, qinfo->qclass);
 		if(!cname) {
-			errinf(qstate, "validator classified CNAME but no "
-				"CNAME of the queried name for DS");
+			reason = "validator classified CNAME but no "
+				"CNAME of the queried name for DS";
+			errinf_ede(qstate, reason, reason_bogus);
 			goto return_bogus;
 		}
 		if(((struct packed_rrset_data*)cname->entry.data)->rrsig_count
 			== 0) {
 		        if(msg->rep->an_numrrsets != 0 && ntohs(msg->rep->
 				rrsets[0]->rk.type)==LDNS_RR_TYPE_DNAME) {
-				errinf(qstate, "DS got DNAME answer");
+				reason = "DS got DNAME answer";
 			} else {
-				errinf(qstate, "DS got unsigned CNAME answer");
+				reason = "DS got unsigned CNAME answer";
 			}
+			errinf_ede(qstate, reason, reason_bogus);
 			goto return_bogus;
 		}
-		sec = val_verify_rrset_entry(qstate->env, ve, cname, 
-			vq->key_entry, &reason, NULL, LDNS_SECTION_ANSWER, qstate);
+		sec = val_verify_rrset_entry(qstate->env, ve, cname,
+			vq->key_entry, &reason, &reason_bogus,
+			LDNS_SECTION_ANSWER, qstate);
 		if(sec == sec_status_secure) {
 			verbose(VERB_ALGO, "CNAME validated, "
 				"proof that DS does not exist");
@@ -2629,12 +2650,13 @@ ds_response_to_ke(struct module_qstate* qstate, struct val_qstate* vq,
 			return 1;
 		}
 		errinf(qstate, "CNAME in DS response was not secure.");
-		errinf(qstate, reason);
+		errinf_ede(qstate, reason, reason_bogus);
 		goto return_bogus;
 	} else {
 		verbose(VERB_QUERY, "Encountered an unhandled type of "
 			"DS response, thus bogus.");
 		errinf(qstate, "no DS and");
+		reason = "no DS";
 		if(FLAGS_GET_RCODE(msg->rep->flags) != LDNS_RCODE_NOERROR) {
 			char rc[16];
 			rc[0]=0;
@@ -2647,8 +2669,8 @@ ds_response_to_ke(struct module_qstate* qstate, struct val_qstate* vq,
 	}
 return_bogus:
 	*ke = key_entry_create_bad(qstate->region, qinfo->qname,
-		qinfo->qname_len, qinfo->qclass, 
-		BOGUS_KEY_TTL, *qstate->env->now);
+		qinfo->qname_len, qinfo->qclass, BOGUS_KEY_TTL,
+		reason_bogus, reason, *qstate->env->now);
 	return (*ke) != NULL;
 }
 
@@ -2768,14 +2790,17 @@ process_dnskey_response(struct module_qstate* qstate, struct val_qstate* vq,
 			vq->restart_count++;
 			return;
 		}
-		vq->key_entry = key_entry_create_bad(qstate->region, 
+		reason = "No DNSKEY record";
+		reason_bogus = LDNS_EDE_DNSKEY_MISSING;
+		vq->key_entry = key_entry_create_bad(qstate->region,
 			qinfo->qname, qinfo->qname_len, qinfo->qclass,
-			BOGUS_KEY_TTL, *qstate->env->now);
+			BOGUS_KEY_TTL, reason_bogus, reason,
+			*qstate->env->now);
 		if(!vq->key_entry) {
 			log_err("alloc failure in missing dnskey response");
 			/* key_entry is NULL for failure in Validate */
 		}
-		errinf_ede(qstate, "No DNSKEY record", LDNS_EDE_DNSKEY_MISSING);
+		errinf_ede(qstate, reason, reason_bogus);
 		errinf_origin(qstate, origin);
 		errinf_dname(qstate, "for key", qinfo->qname);
 		vq->state = VAL_VALIDATE_STATE;
@@ -2822,7 +2847,8 @@ process_dnskey_response(struct module_qstate* qstate, struct val_qstate* vq,
 	qstate->errinf = NULL;
 
 	/* The DNSKEY validated, so cache it as a trusted key rrset. */
-	key_cache_insert(ve->kcache, vq->key_entry, qstate);
+	key_cache_insert(ve->kcache, vq->key_entry,
+		qstate->env->cfg->val_log_level >= 2);
 
 	/* If good, we stay in the FINDKEY state. */
 	log_query_info(VERB_DETAIL, "validated DNSKEY", qinfo);
@@ -2890,7 +2916,8 @@ process_prime_response(struct module_qstate* qstate, struct val_qstate* vq,
 		errinf_origin(qstate, origin);
 		errinf_dname(qstate, "for trust anchor", ta->name);
 		/* store the freshly primed entry in the cache */
-		key_cache_insert(ve->kcache, vq->key_entry, qstate);
+		key_cache_insert(ve->kcache, vq->key_entry,
+			qstate->env->cfg->val_log_level >= 2);
 	}
 
 	/* If the result of the prime is a null key, skip the FINDKEY state.*/
diff --git a/lib/libunbound/Makefile b/lib/libunbound/Makefile
index a8e2f8957296..64261ebad998 100644
--- a/lib/libunbound/Makefile
+++ b/lib/libunbound/Makefile
@@ -24,8 +24,10 @@ SRCS=	alloc.c as112.c authzone.c autotrust.c cachedb.c config_file.c \
 	msgreply.c net_help.c netevent.c outbound_list.c outside_network.c \
 	packed_rrset.c parse.c parseutil.c proxy_protocol.c \
 	random.c rbtree.c redis.c \
-	regional.c respip.c rpz.c rrdef.c rrset.c rtt.c sbuffer.c slabhash.c \
-	str2wire.c tcp_conn_limit.c timehist.c tube.c ub_event_pluggable.c \
+	regional.c respip.c rfc_1982.c rpz.c rrdef.c rrset.c rtt.c sbuffer.c \
+	siphash.c slabhash.c \
+	str2wire.c tcp_conn_limit.c timehist.c timeval_func.c \
+	tube.c ub_event_pluggable.c \
 	val_anchor.c val_kcache.c val_kentry.c val_neg.c val_nsec.c \
 	val_nsec3.c val_secalgo.c val_sigcrypt.c val_utils.c validator.c \
 	view.c winsock_event.c wire2str.c
diff --git a/usr.sbin/unbound/config.h b/usr.sbin/unbound/config.h
index 74a4796af1cd..ff9e17667e7d 100644
--- a/usr.sbin/unbound/config.h
+++ b/usr.sbin/unbound/config.h
@@ -793,7 +793,7 @@
 #define PACKAGE_NAME "unbound"
 
 /* Define to the full name and version of this package. */
-#define PACKAGE_STRING "unbound 1.17.1"
+#define PACKAGE_STRING "unbound 1.18.0"
 
 /* Define to the one symbol short name of this package. */
 #define PACKAGE_TARNAME "unbound"
@@ -802,7 +802,7 @@
 #define PACKAGE_URL ""
 
 /* Define to the version of this package. */
-#define PACKAGE_VERSION "1.17.1"
+#define PACKAGE_VERSION "1.18.0"
 
 /* default pidfile location */
 #define PIDFILE "/var/unbound/unbound.pid"
@@ -825,7 +825,7 @@
 #define ROOT_CERT_FILE "/var/unbound/icannbundle.pem"
 
 /* version number for resource files */
-#define RSRC_PACKAGE_VERSION 1,17,1,0
+#define RSRC_PACKAGE_VERSION 1,18,0,0
 
 /* Directory to chdir to */
 #define RUN_DIR "/var/unbound"