Merge ping6 to ping

There is now a single ping binary, which chooses to use ICMP or ICMPv4
based on the -4 and -6 options, and the format of the address.

Submitted by:	Ján Sučan <sucanjan@gmail.com>
Sponsored by:	Google LLC (Google Summer of Code 2019)
MFC after:	Never
Differential Revision:	https://reviews.freebsd.org/D21377

7 files changed, 0 insertions, 3585 deletions

diff --git a/sbin/ping6/Makefile b/sbin/ping6/Makefile
deleted file mode 100644
index b658f32f06e9..000000000000
--- a/sbin/ping6/Makefile
+++ /dev/null
@@ -1,27 +0,0 @@
-# $FreeBSD$
-
-.include <src.opts.mk>
-
-PACKAGE=runtime
-PROG=	ping6
-MAN=	ping6.8
-
-CFLAGS+=-DIPSEC -DKAME_SCOPEID
-
-BINOWN=	root
-BINMODE=4555
-
-LIBADD=	ipsec m md
-
-.if ${MK_DYNAMICROOT} == "no"
-.warning ${PROG} built without libcasper support
-.elif ${MK_CASPER} != "no" && !defined(RESCUE)
-LIBADD+=	casper
-LIBADD+=	cap_dns
-CFLAGS+=-DWITH_CASPER
-.endif
-
-HAS_TESTS=
-SUBDIR.${MK_TESTS}+= tests
-
-.include <bsd.prog.mk>
diff --git a/sbin/ping6/Makefile.depend b/sbin/ping6/Makefile.depend
deleted file mode 100644
index 725e99740168..000000000000
--- a/sbin/ping6/Makefile.depend
+++ /dev/null
@@ -1,22 +0,0 @@
-# $FreeBSD$
-# Autogenerated - do NOT edit!
-
-DIRDEPS = \
-	include \
-	include/arpa \
-	include/xlocale \
-	lib/${CSU_DIR} \
-	lib/libc \
-	lib/libcapsicum \
-	lib/libcompiler_rt \
-	lib/libipsec \
-	lib/libmd \
-	lib/libnv \
-	lib/msun \
-
-
-.include <dirdeps.mk>
-
-.if ${DEP_RELDIR} == ${_DEP_RELDIR}
-# local dependencies - needed for -jN in clean tree
-.endif
diff --git a/sbin/ping6/ping6.8 b/sbin/ping6/ping6.8
deleted file mode 100644
index 0e355e581370..000000000000
--- a/sbin/ping6/ping6.8
+++ /dev/null
@@ -1,567 +0,0 @@
-.\"	$KAME: ping6.8,v 1.58 2003/06/20 12:00:22 itojun Exp $
-.\"
-.\" Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
-.\" All rights reserved.
-.\"
-.\" Redistribution and use in source and binary forms, with or without
-.\" modification, are permitted provided that the following conditions
-.\" are met:
-.\" 1. Redistributions of source code must retain the above copyright
-.\"    notice, this list of conditions and the following disclaimer.
-.\" 2. 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.
-.\" 3. Neither the name of the project 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 PROJECT 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 PROJECT 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.
-.\"
-.\" $FreeBSD$
-.\"
-.Dd October 2, 2020
-.Dt PING6 8
-.Os
-.Sh NAME
-.Nm ping6
-.Nd send
-.Tn ICMPv6 ECHO_REQUEST
-packets to network hosts
-.Sh SYNOPSIS
-.Nm
-.\" without ipsec, or new ipsec
-.Op Fl aAdDfHnNoOquvyY
-.\" old ipsec
-.\" .Op Fl ADdEfmnNqRtvwW
-.Bk -words
-.Op Fl b Ar bufsiz
-.Ek
-.Bk -words
-.Op Fl C Ar pcp
-.Ek
-.Bk -words
-.Op Fl c Ar count
-.Ek
-.Bk -words
-.Op Fl e Ar gateway
-.Ek
-.Bk -words
-.Op Fl I Ar interface
-.Ek
-.Bk -words
-.Op Fl i Ar wait
-.Ek
-.Bk -words
-.Op Fl k Ar addrtype
-.Ek
-.Bk -words
-.Op Fl l Ar preload
-.Ek
-.Bk -words
-.Op Fl m Ar hoplimit
-.Ek
-.Bk -words
-.\" new ipsec
-.Op Fl P Ar policy
-.Ek
-.Bk -words
-.Op Fl p Ar pattern
-.Ek
-.Bk -words
-.Op Fl S Ar sourceaddr
-.Ek
-.Bk -words
-.Op Fl s Ar packetsize
-.Ek
-.Bk -words
-.Op Fl t Ar timeout
-.Ek
-.Bk -words
-.Op Fl W Ar waittime
-.Ek
-.Bk -words
-.Op Fl z Ar tclass
-.Ek
-.Bk -words
-.Op Ar hops ...
-.Ek
-.Bk -words
-.Ar host
-.Ek
-.Sh DESCRIPTION
-The
-.Nm
-utility uses the
-.Tn ICMPv6
-protocol's mandatory
-.Tn ICMP6_ECHO_REQUEST
-datagram to elicit an
-.Tn ICMP6_ECHO_REPLY
-from a host or gateway.
-.Tn ICMP6_ECHO_REQUEST
-datagrams (``pings'') have an IPv6 header,
-and
-.Tn ICMPv6
-header formatted as documented in RFC2463.
-The options are as follows:
-.Bl -tag -width Ds
-.\" old ipsec
-.\" .It Fl Z
-.\" Enables transport-mode IPsec authentication header
-.\" (experimental).
-.It Fl k Ar addrtype
-Generate ICMPv6 Node Information Node Addresses query, rather than echo-request.
-.Ar addrtype
-must be a string constructed of the following characters.
-.Bl -tag -width Ds -compact
-.It Ic a
-requests unicast addresses from all of the responder's interfaces.
-If the character is omitted,
-only those addresses which belong to the interface which has the
-responder's address are requests.
-.It Ic c
-requests responder's IPv4-compatible and IPv4-mapped addresses.
-.It Ic g
-requests responder's global-scope addresses.
-.It Ic s
-requests responder's site-local addresses.
-.It Ic l
-requests responder's link-local addresses.
-.It Ic A
-requests responder's anycast addresses.
-Without this character, the responder will return unicast addresses only.
-With this character, the responder will return anycast addresses only.
-Note that the specification does not specify how to get responder's
-anycast addresses.
-This is an experimental option.
-.El
-.It Fl b Ar bufsiz
-Set socket buffer size.
-.It Fl C Ar pcp
-Add an 802.1p Ethernet Priority Code Point when sending a packet.
-0..7 uses that specific PCP, -1 uses the interface default PCP (or none).
-.It Fl c Ar count
-Stop after sending
-(and receiving)
-.Ar count
-.Tn ECHO_RESPONSE
-packets.
-.It Fl D
-Disable IPv6 fragmentation.
-.It Fl d
-Set the
-.Dv SO_DEBUG
-option on the socket being used.
-.\" .It Fl E
-.\" Enables transport-mode IPsec encapsulated security payload
-.\" (experimental).
-.It Fl f
-Flood ping.
-Outputs packets as fast as they come back or one hundred times per second,
-whichever is more.
-For every
-.Tn ECHO_REQUEST
-sent a period
-.Dq \&.
-is printed, while for every
-.Tn ECHO_REPLY
-received a backspace is printed.
-This provides a rapid display of how many packets are being dropped.
-Only the super-user may use this option.
-.Bf -emphasis
-This can be very hard on a network and should be used with caution.
-.Ef
-.It Fl e Ar gateway
-Specifies to use
-.Ar gateway
-as the next hop to the destination.
-The gateway must be a neighbor of the sending node.
-.It Fl H
-Specifies to try reverse-lookup of IPv6 addresses.
-The
-.Nm
-utility does not try reverse-lookup unless the option is specified.
-.It Fl m Ar hoplimit
-Set the IPv6 hoplimit.
-.It Fl I Ar interface
-Source packets with the given interface address.
-This flag applies if the ping destination is a multicast address,
-or link-local/site-local unicast address.
-.It Fl i Ar wait
-Wait
-.Ar wait
-seconds
-.Em between sending each packet .
-The default is to wait for one second between each packet.
-This option is incompatible with the
-.Fl f
-option.
-.It Fl W Ar waittime
-Time in milliseconds to wait for a reply for each packet sent.
-If a reply arrives later,
-the packet is not printed as replied,
-but considered as replied when calculating statistics.
-.It Fl t Ar timeout
-Specify a timeout,
-in seconds,
-before ping exits regardless of how many packets have been received.
-.It Fl l Ar preload
-If
-.Ar preload
-is specified,
-.Nm
-sends that many packets as fast as possible before falling into its normal
-mode of behavior.
-Only the super-user may use this option.
-.It Fl u
-By default,
-.Nm
-asks the kernel to fragment packets to fit into the minimum IPv6 MTU.
-The
-.Fl u
-option
-will suppress the behavior in the following two levels:
-when the option is specified once, the behavior will be disabled for
-unicast packets.
-When the option is more than once, it will be disabled for both
-unicast and multicast packets.
-.It Fl n
-Numeric output only.
-No attempt will be made to lookup symbolic names from addresses in the reply.
-.It Fl N
-Probe node information multicast group address
-.Pq Li ff02::2:ffxx:xxxx .
-.Ar host
-must be string hostname of the target
-(must not be a numeric IPv6 address).
-Node information multicast group will be computed based on given
-.Ar host ,
-and will be used as the final destination.
-Since node information multicast group is a link-local multicast group,
-outgoing interface needs to be specified by
-.Fl I
-option.
-.Pp
-When specified twice, the address
-.Pq Li ff02::2:xxxx:xxxx
-is used instead.
-The former is in RFC 4620, the latter is in an old Internet Draft
-draft-ietf-ipngwg-icmp-name-lookup.
-Note that KAME-derived implementations including
-.Fx
-use the latter.
-.It Fl o
-Exit successfully after receiving one reply packet.
-.It Fl p Ar pattern
-You may specify up to 16
-.Dq pad
-bytes to fill out the packet you send.
-This is useful for diagnosing data-dependent problems in a network.
-For example,
-.Dq Li \-p ff
-will cause the sent packet to be filled with all
-ones.
-.\" new ipsec
-.It Fl P Ar policy
-.Ar policy
-specifies IPsec policy to be used for the probe.
-.It Fl q
-Quiet output.
-Nothing is displayed except the summary lines at startup time and
-when finished.
-.It Fl a
-Audible.
-Include a bell
-.Tn ( ASCII
-0x07)
-character in the output when any packet is received.
-.It Fl A
-Audible.
-Output a bell
-.Tn ( ASCII
-0x07)
-character when no packet is received before the next packet
-is transmitted.
-To cater for round-trip times that are longer than the interval
-between transmissions, further missing packets cause a bell only
-if the maximum number of unreceived packets has increased.
-.It Fl S Ar sourceaddr
-Specifies the source address of request packets.
-The source address must be one of the unicast addresses of the sending node,
-and must be numeric.
-.It Fl s Ar packetsize
-Specifies the number of data bytes to be sent.
-The default is 56, which translates into 64
-.Tn ICMP
-data bytes when combined
-with the 8 bytes of
-.Tn ICMP
-header data.
-You may need to specify
-.Fl b
-as well to extend socket buffer size.
-.It Fl O
-Generate ICMPv6 Node Information supported query types query,
-rather than echo-request.
-.Fl s
-has no effect if
-.Fl O
-is specified.
-.It Fl v
-Verbose output.
-.Tn ICMP
-packets other than
-.Tn ECHO_RESPONSE
-that are received are listed.
-.It Fl y
-Generate ICMPv6 Node Information DNS Name query, rather than echo-request.
-.Fl s
-has no effect if
-.Fl y
-is specified.
-.It Fl Y
-Same as
-.Fl y ,
-but with old packet format based on 03 draft.
-This option is present for backward compatibility.
-.Fl s
-has no effect if
-.Fl y
-is specified.
-.It Fl z Ar tclass
-Use the specified traffic class when sending.
-.It Ar hops
-IPv6 addresses for intermediate nodes,
-which will be put into type 0 routing header.
-.It Ar host
-IPv6 address of the final destination node.
-.El
-.Pp
-When using
-.Nm
-for fault isolation, it should first be run on the local host, to verify
-that the local network interface is up and running.
-Then, hosts and gateways further and further away should be
-.Dq pinged .
-Round-trip times and packet loss statistics are computed.
-If duplicate packets are received, they are not included in the packet
-loss calculation, although the round trip time of these packets is used
-in calculating the round-trip time statistics.
-When the specified number of packets have been sent
-(and received)
-or if the program is terminated with a
-.Dv SIGINT ,
-a brief summary is displayed, showing the number of packets sent and
-received, and the minimum, mean, maximum, and standard deviation of
-the round-trip times.
-.Pp
-If
-.Nm
-receives a
-.Dv SIGINFO
-(see the
-.Cm status
-argument for
-.Xr stty 1 )
-signal, the current number of packets sent and received, and the
-minimum, mean, maximum, and standard deviation of the round-trip times
-will be written to the standard output in the same format as the
-standard completion message.
-.Pp
-This program is intended for use in network testing, measurement and
-management.
-Because of the load it can impose on the network, it is unwise to use
-.Nm
-during normal operations or from automated scripts.
-.\" .Sh ICMP PACKET DETAILS
-.\" An IP header without options is 20 bytes.
-.\" An
-.\" .Tn ICMP
-.\" .Tn ECHO_REQUEST
-.\" packet contains an additional 8 bytes worth of
-.\" .Tn ICMP
-.\" header followed by an arbitrary amount of data.
-.\" When a
-.\" .Ar packetsize
-.\" is given, this indicated the size of this extra piece of data
-.\" (the default is 56).
-.\" Thus the amount of data received inside of an IP packet of type
-.\" .Tn ICMP
-.\" .Tn ECHO_REPLY
-.\" will always be 8 bytes more than the requested data space
-.\" (the
-.\" .Tn ICMP
-.\" header).
-.\" .Pp
-.\" If the data space is at least eight bytes large,
-.\" .Nm
-.\" uses the first eight bytes of this space to include a timestamp which
-.\" it uses in the computation of round trip times.
-.\" If less than eight bytes of pad are specified, no round trip times are
-.\" given.
-.Sh DUPLICATE AND DAMAGED PACKETS
-The
-.Nm
-utility will report duplicate and damaged packets.
-Duplicate packets should never occur when pinging a unicast address,
-and seem to be caused by
-inappropriate link-level retransmissions.
-Duplicates may occur in many situations and are rarely
-(if ever)
-a good sign, although the presence of low levels of duplicates may not
-always be cause for alarm.
-Duplicates are expected when pinging a broadcast or multicast address,
-since they are not really duplicates but replies from different hosts
-to the same request.
-.Pp
-Damaged packets are obviously serious cause for alarm and often
-indicate broken hardware somewhere in the
-.Nm
-packet's path
-(in the network or in the hosts).
-.Sh TRYING DIFFERENT DATA PATTERNS
-The
-(inter)network
-layer should never treat packets differently depending on the data
-contained in the data portion.
-Unfortunately, data-dependent problems have been known to sneak into
-networks and remain undetected for long periods of time.
-In many cases the particular pattern that will have problems is something
-that does not have sufficient
-.Dq transitions ,
-such as all ones or all zeros, or a pattern right at the edge, such as
-almost all zeros.
-It is not
-necessarily enough to specify a data pattern of all zeros (for example)
-on the command line because the pattern that is of interest is
-at the data link level, and the relationship between what you type and
-what the controllers transmit can be complicated.
-.Pp
-This means that if you have a data-dependent problem you will probably
-have to do a lot of testing to find it.
-If you are lucky, you may manage to find a file that either
-cannot
-be sent across your network or that takes much longer to transfer than
-other similar length files.
-You can then examine this file for repeated patterns that you can test
-using the
-.Fl p
-option of
-.Nm .
-.Sh EXIT STATUS
-The
-.Nm
-utility returns 0 on success (the host is alive),
-2 if the transmission was successful but no responses were received,
-any other non-zero value if the arguments are incorrect or
-another error has occurred.
-.Sh EXAMPLES
-Normally,
-.Nm
-works just like
-.Xr ping 8
-would work; the following will send ICMPv6 echo request to
-.Li dst.foo.com .
-.Bd -literal -offset indent
-ping6 -n dst.foo.com
-.Ed
-.Pp
-The following will probe hostnames for all nodes on the network link attached to
-.Li wi0
-interface.
-The address
-.Li ff02::1
-is named the link-local all-node multicast address, and the packet would
-reach every node on the network link.
-.Bd -literal -offset indent
-ping6 -y ff02::1%wi0
-.Ed
-.Pp
-The following will probe addresses assigned to the destination node,
-.Li dst.foo.com .
-.Bd -literal -offset indent
-ping6 -k agl dst.foo.com
-.Ed
-.Sh SEE ALSO
-.Xr netstat 1 ,
-.Xr icmp6 4 ,
-.Xr inet6 4 ,
-.Xr ip6 4 ,
-.Xr ifconfig 8 ,
-.Xr ping 8 ,
-.Xr routed 8 ,
-.Xr traceroute 8 ,
-.Xr traceroute6 8
-.Rs
-.%A A. Conta
-.%A S. Deering
-.%T "Internet Control Message Protocol (ICMPv6) for the Internet Protocol Version 6 (IPv6) Specification"
-.%N RFC2463
-.%D December 1998
-.Re
-.Rs
-.%A Matt Crawford
-.%T "IPv6 Node Information Queries"
-.%N draft-ietf-ipngwg-icmp-name-lookups-09.txt
-.%D May 2002
-.%O work in progress material
-.Re
-.Sh HISTORY
-The
-.Xr ping 8
-utility appeared in
-.Bx 4.3 .
-The
-.Nm
-utility with IPv6 support first appeared in the WIDE Hydrangea IPv6
-protocol stack kit.
-.Pp
-IPv6 and IPsec support based on the KAME Project
-.Pq Pa http://www.kame.net/
-stack was initially integrated into
-.Fx 4.0 .
-.Sh BUGS
-The
-.Nm
-utility
-is intentionally separate from
-.Xr ping 8 .
-.Pp
-There have been many discussions on why we separate
-.Nm
-and
-.Xr ping 8 .
-Some people argued that it would be more convenient to uniform the
-ping command for both IPv4 and IPv6.
-The followings are an answer to the request.
-.Pp
-From a developer's point of view:
-since the underling raw sockets API is totally different between IPv4
-and IPv6, we would end up having two types of code base.
-There would actually be less benefit to uniform the two commands
-into a single command from the developer's standpoint.
-.Pp
-From an operator's point of view: unlike ordinary network applications
-like remote login tools, we are usually aware of address family when using
-network management tools.
-We do not just want to know the reachability to the host, but want to know the
-reachability to the host via a particular network protocol such as
-IPv6.
-Thus, even if we had a unified
-.Xr ping 8
-command for both IPv4 and IPv6, we would usually type a
-.Fl 6
-or
-.Fl 4
-option (or something like those) to specify the particular address family.
-This essentially means that we have two different commands.
diff --git a/sbin/ping6/ping6.c b/sbin/ping6/ping6.c
deleted file mode 100644
index dba9f81ca87d..000000000000
--- a/sbin/ping6/ping6.c
+++ /dev/null
@@ -1,2902 +0,0 @@
-/*	$KAME: ping6.c,v 1.169 2003/07/25 06:01:47 itojun Exp $	*/
-
-/*-
- * SPDX-License-Identifier: BSD-3-Clause
- *
- * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. 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.
- * 3. Neither the name of the project 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 PROJECT 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 PROJECT 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.
- */
-
-/*	BSDI	ping.c,v 2.3 1996/01/21 17:56:50 jch Exp	*/
-
-/*
- * Copyright (c) 1989, 1993
- *	The Regents of the University of California.  All rights reserved.
- *
- * This code is derived from software contributed to Berkeley by
- * Mike Muuss.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. 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.
- * 3. Neither the name of the University 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 REGENTS 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 REGENTS 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.
- */
-
-#if 0
-#ifndef lint
-static const char copyright[] =
-"@(#) Copyright (c) 1989, 1993\n\
-	The Regents of the University of California.  All rights reserved.\n";
-#endif /* not lint */
-
-#ifndef lint
-static char sccsid[] = "@(#)ping.c	8.1 (Berkeley) 6/5/93";
-#endif /* not lint */
-#endif
-
-#include <sys/cdefs.h>
-__FBSDID("$FreeBSD$");
-
-/*
- * Using the InterNet Control Message Protocol (ICMP) "ECHO" facility,
- * measure round-trip-delays and packet loss across network paths.
- *
- * Author -
- *	Mike Muuss
- *	U. S. Army Ballistic Research Laboratory
- *	December, 1983
- *
- * Status -
- *	Public Domain.  Distribution Unlimited.
- * Bugs -
- *	More statistics could always be gathered.
- *	This program has to run SUID to ROOT to access the ICMP socket.
- */
-/*
- * NOTE:
- * USE_SIN6_SCOPE_ID assumes that sin6_scope_id has the same semantics
- * as IPV6_PKTINFO.  Some people object it (sin6_scope_id specifies *link*
- * while IPV6_PKTINFO specifies *interface*.  Link is defined as collection of
- * network attached to 1 or more interfaces)
- */
-
-#include <sys/param.h>
-#include <sys/capsicum.h>
-#include <sys/uio.h>
-#include <sys/socket.h>
-
-#include <net/if.h>
-#include <net/route.h>
-
-#include <netinet/in.h>
-#include <netinet/ip6.h>
-#include <netinet/icmp6.h>
-#include <arpa/inet.h>
-#include <arpa/nameser.h>
-#include <netdb.h>
-
-#include <capsicum_helpers.h>
-#include <casper/cap_dns.h>
-#include <libcasper.h>
-
-#include <ctype.h>
-#include <err.h>
-#include <errno.h>
-#include <fcntl.h>
-#include <math.h>
-#include <signal.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <sysexits.h>
-#include <time.h>
-#include <unistd.h>
-
-#ifdef IPSEC
-#include <netipsec/ah.h>
-#include <netipsec/ipsec.h>
-#endif
-
-#include <md5.h>
-
-struct tv32 {
-	u_int32_t tv32_sec;
-	u_int32_t tv32_nsec;
-};
-
-#define MAXPACKETLEN	131072
-#define	IP6LEN		40
-#define ICMP6ECHOLEN	8	/* icmp echo header len excluding time */
-#define ICMP6ECHOTMLEN sizeof(struct tv32)
-#define ICMP6_NIQLEN	(ICMP6ECHOLEN + 8)
-# define CONTROLLEN	10240	/* ancillary data buffer size RFC3542 20.1 */
-/* FQDN case, 64 bits of nonce + 32 bits ttl */
-#define ICMP6_NIRLEN	(ICMP6ECHOLEN + 12)
-#define	EXTRA		256	/* for AH and various other headers. weird. */
-#define	DEFDATALEN	ICMP6ECHOTMLEN
-#define MAXDATALEN	MAXPACKETLEN - IP6LEN - ICMP6ECHOLEN
-#define	NROUTES		9		/* number of record route slots */
-#define	MAXWAIT		10000		/* max ms to wait for response */
-#define	MAXALARM	(60 * 60)	/* max seconds for alarm timeout */
-
-#define	A(bit)		rcvd_tbl[(bit)>>3]	/* identify byte in array */
-#define	B(bit)		(1 << ((bit) & 0x07))	/* identify bit in byte */
-#define	SET(bit)	(A(bit) |= B(bit))
-#define	CLR(bit)	(A(bit) &= (~B(bit)))
-#define	TST(bit)	(A(bit) & B(bit))
-
-#define	F_FLOOD		0x0001
-#define	F_INTERVAL	0x0002
-#define	F_PINGFILLED	0x0008
-#define	F_QUIET		0x0010
-#define	F_RROUTE	0x0020
-#define	F_SO_DEBUG	0x0040
-#define	F_VERBOSE	0x0100
-#ifdef IPSEC
-#ifdef IPSEC_POLICY_IPSEC
-#define	F_POLICY	0x0400
-#else
-#define F_AUTHHDR	0x0200
-#define F_ENCRYPT	0x0400
-#endif /*IPSEC_POLICY_IPSEC*/
-#endif /*IPSEC*/
-#define F_NODEADDR	0x0800
-#define F_FQDN		0x1000
-#define F_INTERFACE	0x2000
-#define F_SRCADDR	0x4000
-#define F_HOSTNAME	0x10000
-#define F_FQDNOLD	0x20000
-#define F_NIGROUP	0x40000
-#define F_SUPTYPES	0x80000
-#define F_NOMINMTU	0x100000
-#define F_ONCE		0x200000
-#define F_AUDIBLE	0x400000
-#define F_MISSED	0x800000
-#define F_DONTFRAG	0x1000000
-#define F_NOUSERDATA	(F_NODEADDR | F_FQDN | F_FQDNOLD | F_SUPTYPES)
-#define	F_WAITTIME	0x2000000
-static u_int options;
-
-#define IN6LEN		sizeof(struct in6_addr)
-#define SA6LEN		sizeof(struct sockaddr_in6)
-#define DUMMY_PORT	10101
-
-#define SIN6(s)	((struct sockaddr_in6 *)(s))
-
-/*
- * MAX_DUP_CHK is the number of bits in received table, i.e. the maximum
- * number of received sequence numbers we can keep track of.  Change 128
- * to 8192 for complete accuracy...
- */
-#define	MAX_DUP_CHK	(8 * 8192)
-static int mx_dup_ck = MAX_DUP_CHK;
-static char rcvd_tbl[MAX_DUP_CHK / 8];
-
-static struct sockaddr_in6 dst;	/* who to ping6 */
-static struct sockaddr_in6 src;	/* src addr of this packet */
-static socklen_t srclen;
-static size_t datalen = DEFDATALEN;
-static int ssend;		/* send socket file descriptor */
-static int srecv;		/* receive socket file descriptor */
-static u_char outpack[MAXPACKETLEN];
-static char BSPACE = '\b';	/* characters written for flood */
-static char BBELL = '\a';	/* characters written for AUDIBLE */
-static char DOT = '.';
-static char *hostname;
-static int ident;		/* process id to identify our packets */
-static u_int8_t nonce[8];	/* nonce field for node information */
-static int hoplimit = -1;	/* hoplimit */
-static int tclass = -1;		/* traffic class */
-static int pcp = -2;		/* vlan priority code point */
-static u_char *packet = NULL;
-static cap_channel_t *capdns;
-
-/* counters */
-static long nmissedmax;		/* max value of ntransmitted - nreceived - 1 */
-static long npackets;		/* max packets to transmit */
-static long nreceived;		/* # of packets we got back */
-static long nrepeats;		/* number of duplicates */
-static long ntransmitted;	/* sequence # for outbound packets = #sent */
-static long ntransmitfailures;	/* number of transmit failures */
-static int interval = 1000;	/* interval between packets in ms */
-static int waittime = MAXWAIT;	/* timeout for each packet */
-static long nrcvtimeout = 0;	/* # of packets we got back after waittime */
-
-/* timing */
-static int timing;		/* flag to do timing */
-static double tmin = 999999999.0;	/* minimum round trip time */
-static double tmax = 0.0;	/* maximum round trip time */
-static double tsum = 0.0;	/* sum of all times, for doing average */
-static double tsumsq = 0.0;	/* sum of all times squared, for std. dev. */
-
-/* for node addresses */
-static u_short naflags;
-
-/* for ancillary data(advanced API) */
-static struct msghdr smsghdr;
-static struct iovec smsgiov;
-static char *scmsg = 0;
-
-static volatile sig_atomic_t seenint;
-#ifdef SIGINFO
-static volatile sig_atomic_t seeninfo;
-#endif
-
-int	 main(int, char *[]);
-static cap_channel_t *capdns_setup(void);
-static void	 fill(char *, char *);
-static int	 get_hoplim(struct msghdr *);
-static int	 get_pathmtu(struct msghdr *);
-static struct in6_pktinfo *get_rcvpktinfo(struct msghdr *);
-static void	 onsignal(int);
-static void	 onint(int);
-static size_t	 pingerlen(void);
-static int	 pinger(void);
-static const char *pr_addr(struct sockaddr *, int);
-static void	 pr_icmph(struct icmp6_hdr *, u_char *);
-static void	 pr_iph(struct ip6_hdr *);
-static void	 pr_suptypes(struct icmp6_nodeinfo *, size_t);
-static void	 pr_nodeaddr(struct icmp6_nodeinfo *, int);
-static int	 myechoreply(const struct icmp6_hdr *);
-static int	 mynireply(const struct icmp6_nodeinfo *);
-static const char *dnsdecode(const u_char *, const u_char *, const u_char *,
-    char *, size_t);
-static void	 pr_pack(u_char *, int, struct msghdr *);
-static void	 pr_exthdrs(struct msghdr *);
-static void	 pr_ip6opt(void *, size_t);
-static void	 pr_rthdr(void *, size_t);
-static int	 pr_bitrange(u_int32_t, int, int);
-static void	 pr_retip(struct ip6_hdr *, u_char *);
-static void	 summary(void);
-static int	 setpolicy(int, char *);
-static char	*nigroup(char *, int);
-static void	 usage(void);
-
-int
-main(int argc, char *argv[])
-{
-	struct timespec last, intvl;
-	struct sockaddr_in6 from, *sin6;
-	struct addrinfo hints, *res;
-	struct sigaction si_sa;
-	int cc, i;
-	int almost_done, ch, hold, packlen, preload, optval, error;
-	int nig_oldmcprefix = -1;
-	u_char *datap;
-	char *e, *target, *ifname = NULL, *gateway = NULL;
-	int ip6optlen = 0;
-	struct cmsghdr *scmsgp = NULL;
-	/* For control (ancillary) data received from recvmsg() */
-	u_char cm[CONTROLLEN];
-#if defined(SO_SNDBUF) && defined(SO_RCVBUF)
-	u_long lsockbufsize;
-	int sockbufsize = 0;
-#endif
-	int usepktinfo = 0;
-	struct in6_pktinfo pktinfo;
-	char *cmsg_pktinfo = NULL;
-	struct ip6_rthdr *rthdr = NULL;
-#ifdef IPSEC_POLICY_IPSEC
-	char *policy_in = NULL;
-	char *policy_out = NULL;
-#endif
-	double t;
-	u_long alarmtimeout;
-	size_t rthlen;
-#ifdef IPV6_USE_MIN_MTU
-	int mflag = 0;
-#endif
-	cap_rights_t rights_srecv;
-	cap_rights_t rights_ssend;
-	cap_rights_t rights_stdin;
-
-	/* just to be sure */
-	memset(&smsghdr, 0, sizeof(smsghdr));
-	memset(&smsgiov, 0, sizeof(smsgiov));
-	memset(&pktinfo, 0, sizeof(pktinfo));
-
-	intvl.tv_sec = interval / 1000;
-	intvl.tv_nsec = interval % 1000 * 1000000;
-
-	alarmtimeout = preload = 0;
-	datap = &outpack[ICMP6ECHOLEN + ICMP6ECHOTMLEN];
-	capdns = capdns_setup();
-#ifndef IPSEC
-#define ADDOPTS
-#else
-#ifdef IPSEC_POLICY_IPSEC
-#define ADDOPTS	"P:"
-#else
-#define ADDOPTS	"ZE"
-#endif /*IPSEC_POLICY_IPSEC*/
-#endif
-	while ((ch = getopt(argc, argv,
-	    "k:b:C:c:DdfHe:m:I:i:l:unNop:qaAS:s:OvyYW:t:z:" ADDOPTS)) != -1) {
-#undef ADDOPTS
-		switch (ch) {
-		case 'k':
-		{
-			char *cp;
-
-			options &= ~F_NOUSERDATA;
-			options |= F_NODEADDR;
-			for (cp = optarg; *cp != '\0'; cp++) {
-				switch (*cp) {
-				case 'a':
-					naflags |= NI_NODEADDR_FLAG_ALL;
-					break;
-				case 'c':
-				case 'C':
-					naflags |= NI_NODEADDR_FLAG_COMPAT;
-					break;
-				case 'l':
-				case 'L':
-					naflags |= NI_NODEADDR_FLAG_LINKLOCAL;
-					break;
-				case 's':
-				case 'S':
-					naflags |= NI_NODEADDR_FLAG_SITELOCAL;
-					break;
-				case 'g':
-				case 'G':
-					naflags |= NI_NODEADDR_FLAG_GLOBAL;
-					break;
-				case 'A': /* experimental. not in the spec */
-#ifdef NI_NODEADDR_FLAG_ANYCAST
-					naflags |= NI_NODEADDR_FLAG_ANYCAST;
-					break;
-#else
-					errx(1,
-"-a A is not supported on the platform");
-					/*NOTREACHED*/
-#endif
-				default:
-					usage();
-					/*NOTREACHED*/
-				}
-			}
-			break;
-		}
-		case 'b':
-#if defined(SO_SNDBUF) && defined(SO_RCVBUF)
-			errno = 0;
-			e = NULL;
-			lsockbufsize = strtoul(optarg, &e, 10);
-			sockbufsize = (int)lsockbufsize;
-			if (errno || !*optarg || *e ||
-			    lsockbufsize > INT_MAX)
-				errx(1, "invalid socket buffer size");
-#else
-			errx(1,
-"-b option ignored: SO_SNDBUF/SO_RCVBUF socket options not supported");
-#endif
-			break;
-		case 'C':		/* vlan priority code point */
-			pcp = strtol(optarg, &e, 10);
-			if (*optarg == '\0' || *e != '\0')
-				errx(1, "illegal vlan pcp %s", optarg);
-			if (7 < pcp || pcp < -1)
-				errx(1, "illegal vlan pcp -- %s", optarg);
-			break;
-		case 'c':
-			npackets = strtol(optarg, &e, 10);
-			if (npackets <= 0 || *optarg == '\0' || *e != '\0')
-				errx(1,
-				    "illegal number of packets -- %s", optarg);
-			break;
-		case 'D':
-			options |= F_DONTFRAG;
-			break;
-		case 'd':
-			options |= F_SO_DEBUG;
-			break;
-		case 'f':
-			if (getuid()) {
-				errno = EPERM;
-				errx(1, "Must be superuser to flood ping");
-			}
-			options |= F_FLOOD;
-			setbuf(stdout, (char *)NULL);
-			break;
-		case 'e':
-			gateway = optarg;
-			break;
-		case 'H':
-			options |= F_HOSTNAME;
-			break;
-		case 'm':		/* hoplimit */
-			hoplimit = strtol(optarg, &e, 10);
-			if (*optarg == '\0' || *e != '\0')
-				errx(1, "illegal hoplimit %s", optarg);
-			if (255 < hoplimit || hoplimit < -1)
-				errx(1,
-				    "illegal hoplimit -- %s", optarg);
-			break;
-		case 'I':
-			ifname = optarg;
-			options |= F_INTERFACE;
-#ifndef USE_SIN6_SCOPE_ID
-			usepktinfo++;
-#endif
-			break;
-		case 'i':		/* wait between sending packets */
-			t = strtod(optarg, &e);
-			if (*optarg == '\0' || *e != '\0')
-				errx(1, "illegal timing interval %s", optarg);
-			if (t < 1 && getuid()) {
-				errx(1, "%s: only root may use interval < 1s",
-				    strerror(EPERM));
-			}
-			intvl.tv_sec = (time_t)t;
-			intvl.tv_nsec =
-			    (long)((t - intvl.tv_sec) * 1000000000);
-			if (intvl.tv_sec < 0)
-				errx(1, "illegal timing interval %s", optarg);
-			/* less than 1/hz does not make sense */
-			if (intvl.tv_sec == 0 && intvl.tv_nsec < 1000) {
-				warnx("too small interval, raised to .000001");
-				intvl.tv_nsec = 1000;
-			}
-			options |= F_INTERVAL;
-			break;
-		case 'l':
-			if (getuid()) {
-				errno = EPERM;
-				errx(1, "Must be superuser to preload");
-			}
-			preload = strtol(optarg, &e, 10);
-			if (preload < 0 || *optarg == '\0' || *e != '\0')
-				errx(1, "illegal preload value -- %s", optarg);
-			break;
-		case 'u':
-#ifdef IPV6_USE_MIN_MTU
-			mflag++;
-			break;
-#else
-			errx(1, "-%c is not supported on this platform", ch);
-			/*NOTREACHED*/
-#endif
-		case 'n':
-			options &= ~F_HOSTNAME;
-			break;
-		case 'N':
-			options |= F_NIGROUP;
-			nig_oldmcprefix++;
-			break;
-		case 'o':
-			options |= F_ONCE;
-			break;
-		case 'p':		/* fill buffer with user pattern */
-			options |= F_PINGFILLED;
-			fill((char *)datap, optarg);
-				break;
-		case 'q':
-			options |= F_QUIET;
-			break;
-		case 'a':
-			options |= F_AUDIBLE;
-			break;
-		case 'A':
-			options |= F_MISSED;
-			break;
-		case 'S':
-			memset(&hints, 0, sizeof(struct addrinfo));
-			hints.ai_flags = AI_NUMERICHOST; /* allow hostname? */
-			hints.ai_family = AF_INET6;
-			hints.ai_socktype = SOCK_RAW;
-			hints.ai_protocol = IPPROTO_ICMPV6;
-
-			error = cap_getaddrinfo(capdns, optarg, NULL, &hints, &res);
-			if (error) {
-				errx(1, "invalid source address: %s",
-				     gai_strerror(error));
-			}
-			/*
-			 * res->ai_family must be AF_INET6 and res->ai_addrlen
-			 * must be sizeof(src).
-			 */
-			memcpy(&src, res->ai_addr, res->ai_addrlen);
-			srclen = res->ai_addrlen;
-			freeaddrinfo(res);
-			options |= F_SRCADDR;
-			break;
-		case 's':		/* size of packet to send */
-			datalen = strtol(optarg, &e, 10);
-			if (datalen <= 0 || *optarg == '\0' || *e != '\0')
-				errx(1, "illegal datalen value -- %s", optarg);
-			if (datalen > MAXDATALEN) {
-				errx(1,
-				    "datalen value too large, maximum is %d",
-				    MAXDATALEN);
-			}
-			break;
-		case 'O':
-			options &= ~F_NOUSERDATA;
-			options |= F_SUPTYPES;
-			break;
-		case 'v':
-			options |= F_VERBOSE;
-			break;
-		case 'y':
-			options &= ~F_NOUSERDATA;
-			options |= F_FQDN;
-			break;
-		case 'Y':
-			options &= ~F_NOUSERDATA;
-			options |= F_FQDNOLD;
-			break;
-		case 'W':
-			t = strtod(optarg, &e);
-			if (*e || e == optarg || t > (double)INT_MAX)
-				err(EX_USAGE, "invalid timing interval: `%s'",
-				    optarg);
-			options |= F_WAITTIME;
-			waittime = (int)t;
-			break;
-		case 't':
-			alarmtimeout = strtoul(optarg, &e, 0);
-			if ((alarmtimeout < 1) || (alarmtimeout == ULONG_MAX))
-				errx(EX_USAGE, "invalid timeout: `%s'",
-				    optarg);
-			if (alarmtimeout > MAXALARM)
-				errx(EX_USAGE, "invalid timeout: `%s' > %d",
-				    optarg, MAXALARM);
-			{
-				struct itimerval itv;
-
-				timerclear(&itv.it_interval);
-				timerclear(&itv.it_value);
-				itv.it_value.tv_sec = (time_t)alarmtimeout;
-				if (setitimer(ITIMER_REAL, &itv, NULL) != 0)
-					err(1, "setitimer");
-			}
-			break;
-		case 'z':		/* traffic class */
-			tclass = strtol(optarg, &e, 10);
-			if (*optarg == '\0' || *e != '\0')
-				errx(1, "illegal traffic class %s", optarg);
-			if (255 < tclass || tclass < -1)
-				errx(1,
-				    "illegal traffic class -- %s", optarg);
-			break;
-#ifdef IPSEC
-#ifdef IPSEC_POLICY_IPSEC
-		case 'P':
-			options |= F_POLICY;
-			if (!strncmp("in", optarg, 2)) {
-				if ((policy_in = strdup(optarg)) == NULL)
-					errx(1, "strdup");
-			} else if (!strncmp("out", optarg, 3)) {
-				if ((policy_out = strdup(optarg)) == NULL)
-					errx(1, "strdup");
-			} else
-				errx(1, "invalid security policy");
-			break;
-#else
-		case 'Z':
-			options |= F_AUTHHDR;
-			break;
-		case 'E':
-			options |= F_ENCRYPT;
-			break;
-#endif /*IPSEC_POLICY_IPSEC*/
-#endif /*IPSEC*/
-		default:
-			usage();
-			/*NOTREACHED*/
-		}
-	}
-
-	argc -= optind;
-	argv += optind;
-
-	if (argc < 1) {
-		usage();
-		/*NOTREACHED*/
-	}
-
-	if (argc > 1) {
-#ifdef IPV6_RECVRTHDR	/* 2292bis */
-		rthlen = CMSG_SPACE(inet6_rth_space(IPV6_RTHDR_TYPE_0,
-		    argc - 1));
-#else  /* RFC2292 */
-		rthlen = inet6_rthdr_space(IPV6_RTHDR_TYPE_0, argc - 1);
-#endif
-		if (rthlen == 0) {
-			errx(1, "too many intermediate hops");
-			/*NOTREACHED*/
-		}
-		ip6optlen += rthlen;
-	}
-
-	if (options & F_NIGROUP) {
-		target = nigroup(argv[argc - 1], nig_oldmcprefix);
-		if (target == NULL) {
-			usage();
-			/*NOTREACHED*/
-		}
-	} else
-		target = argv[argc - 1];
-
-	/* cap_getaddrinfo */
-	memset(&hints, 0, sizeof(struct addrinfo));
-	hints.ai_flags = AI_CANONNAME;
-	hints.ai_family = AF_INET6;
-	hints.ai_socktype = SOCK_RAW;
-	hints.ai_protocol = IPPROTO_ICMPV6;
-
-	error = cap_getaddrinfo(capdns, target, NULL, &hints, &res);
-	if (error)
-		errx(1, "%s", gai_strerror(error));
-	if (res->ai_canonname)
-		hostname = strdup(res->ai_canonname);
-	else
-		hostname = target;
-
-	if (!res->ai_addr)
-		errx(1, "cap_getaddrinfo failed");
-
-	(void)memcpy(&dst, res->ai_addr, res->ai_addrlen);
-
-	if ((ssend = socket(res->ai_family, res->ai_socktype,
-	    res->ai_protocol)) < 0)
-		err(1, "socket ssend");
-	if ((srecv = socket(res->ai_family, res->ai_socktype,
-	    res->ai_protocol)) < 0)
-		err(1, "socket srecv");
-	freeaddrinfo(res);
-
-	/* set the source address if specified. */
-	if ((options & F_SRCADDR) != 0) {
-		/* properly fill sin6_scope_id */
-		if (IN6_IS_ADDR_LINKLOCAL(&src.sin6_addr) && (
-		    IN6_IS_ADDR_LINKLOCAL(&dst.sin6_addr) ||
-		    IN6_IS_ADDR_MC_LINKLOCAL(&dst.sin6_addr) ||
-		    IN6_IS_ADDR_MC_NODELOCAL(&dst.sin6_addr))) {
-			if (src.sin6_scope_id == 0)
-				src.sin6_scope_id = dst.sin6_scope_id;
-			if (dst.sin6_scope_id == 0)
-				dst.sin6_scope_id = src.sin6_scope_id;
-		}
-		if (bind(ssend, (struct sockaddr *)&src, srclen) != 0)
-			err(1, "bind");
-	}
-	/* set the gateway (next hop) if specified */
-	if (gateway) {
-		memset(&hints, 0, sizeof(hints));
-		hints.ai_family = AF_INET6;
-		hints.ai_socktype = SOCK_RAW;
-		hints.ai_protocol = IPPROTO_ICMPV6;
-
-		error = cap_getaddrinfo(capdns, gateway, NULL, &hints, &res);
-		if (error) {
-			errx(1, "cap_getaddrinfo for the gateway %s: %s",
-			     gateway, gai_strerror(error));
-		}
-		if (res->ai_next && (options & F_VERBOSE))
-			warnx("gateway resolves to multiple addresses");
-
-		if (setsockopt(ssend, IPPROTO_IPV6, IPV6_NEXTHOP,
-		    res->ai_addr, res->ai_addrlen)) {
-			err(1, "setsockopt(IPV6_NEXTHOP)");
-		}
-
-		freeaddrinfo(res);
-	}
-
-	/*
-	 * let the kerel pass extension headers of incoming packets,
-	 * for privileged socket options
-	 */
-	if ((options & F_VERBOSE) != 0) {
-		int opton = 1;
-
-#ifdef IPV6_RECVHOPOPTS
-		if (setsockopt(srecv, IPPROTO_IPV6, IPV6_RECVHOPOPTS, &opton,
-		    sizeof(opton)))
-			err(1, "setsockopt(IPV6_RECVHOPOPTS)");
-#else  /* old adv. API */
-		if (setsockopt(srecv, IPPROTO_IPV6, IPV6_HOPOPTS, &opton,
-		    sizeof(opton)))
-			err(1, "setsockopt(IPV6_HOPOPTS)");
-#endif
-#ifdef IPV6_RECVDSTOPTS
-		if (setsockopt(srecv, IPPROTO_IPV6, IPV6_RECVDSTOPTS, &opton,
-		    sizeof(opton)))
-			err(1, "setsockopt(IPV6_RECVDSTOPTS)");
-#else  /* old adv. API */
-		if (setsockopt(srecv, IPPROTO_IPV6, IPV6_DSTOPTS, &opton,
-		    sizeof(opton)))
-			err(1, "setsockopt(IPV6_DSTOPTS)");
-#endif
-#ifdef IPV6_RECVRTHDRDSTOPTS
-		if (setsockopt(srecv, IPPROTO_IPV6, IPV6_RECVRTHDRDSTOPTS, &opton,
-		    sizeof(opton)))
-			err(1, "setsockopt(IPV6_RECVRTHDRDSTOPTS)");
-#endif
-	}
-
-	/* revoke root privilege */
-	if (seteuid(getuid()) != 0)
-		err(1, "seteuid() failed");
-	if (setuid(getuid()) != 0)
-		err(1, "setuid() failed");
-
-	if ((options & F_FLOOD) && (options & F_INTERVAL))
-		errx(1, "-f and -i incompatible options");
-
-	if ((options & F_NOUSERDATA) == 0) {
-		if (datalen >= sizeof(struct tv32)) {
-			/* we can time transfer */
-			timing = 1;
-		} else
-			timing = 0;
-		/* in F_VERBOSE case, we may get non-echoreply packets*/
-		if (options & F_VERBOSE)
-			packlen = 2048 + IP6LEN + ICMP6ECHOLEN + EXTRA;
-		else
-			packlen = datalen + IP6LEN + ICMP6ECHOLEN + EXTRA;
-	} else {
-		/* suppress timing for node information query */
-		timing = 0;
-		datalen = 2048;
-		packlen = 2048 + IP6LEN + ICMP6ECHOLEN + EXTRA;
-	}
-
-	if (!(packet = (u_char *)malloc((u_int)packlen)))
-		err(1, "Unable to allocate packet");
-	if (!(options & F_PINGFILLED))
-		for (i = ICMP6ECHOLEN; i < packlen; ++i)
-			*datap++ = i;
-
-	ident = getpid() & 0xFFFF;
-	arc4random_buf(nonce, sizeof(nonce));
-	optval = 1;
-	if (options & F_DONTFRAG)
-		if (setsockopt(ssend, IPPROTO_IPV6, IPV6_DONTFRAG,
-		    &optval, sizeof(optval)) == -1)
-			err(1, "IPV6_DONTFRAG");
-	hold = 1;
-
-	if (options & F_SO_DEBUG) {
-		(void)setsockopt(ssend, SOL_SOCKET, SO_DEBUG, (char *)&hold,
-		    sizeof(hold));
-		(void)setsockopt(srecv, SOL_SOCKET, SO_DEBUG, (char *)&hold,
-		    sizeof(hold));
-	}
-	optval = IPV6_DEFHLIM;
-	if (IN6_IS_ADDR_MULTICAST(&dst.sin6_addr))
-		if (setsockopt(ssend, IPPROTO_IPV6, IPV6_MULTICAST_HOPS,
-		    &optval, sizeof(optval)) == -1)
-			err(1, "IPV6_MULTICAST_HOPS");
-#ifdef IPV6_USE_MIN_MTU
-	if (mflag != 1) {
-		optval = mflag > 1 ? 0 : 1;
-
-		if (setsockopt(ssend, IPPROTO_IPV6, IPV6_USE_MIN_MTU,
-		    &optval, sizeof(optval)) == -1)
-			err(1, "setsockopt(IPV6_USE_MIN_MTU)");
-	}
-#ifdef IPV6_RECVPATHMTU
-	else {
-		optval = 1;
-		if (setsockopt(srecv, IPPROTO_IPV6, IPV6_RECVPATHMTU,
-		    &optval, sizeof(optval)) == -1)
-			err(1, "setsockopt(IPV6_RECVPATHMTU)");
-	}
-#endif /* IPV6_RECVPATHMTU */
-#endif /* IPV6_USE_MIN_MTU */
-
-#ifdef IPSEC
-#ifdef IPSEC_POLICY_IPSEC
-	if (options & F_POLICY) {
-		if (setpolicy(srecv, policy_in) < 0)
-			errx(1, "%s", ipsec_strerror());
-		if (setpolicy(ssend, policy_out) < 0)
-			errx(1, "%s", ipsec_strerror());
-	}
-#else
-	if (options & F_AUTHHDR) {
-		optval = IPSEC_LEVEL_REQUIRE;
-#ifdef IPV6_AUTH_TRANS_LEVEL
-		if (setsockopt(ssend, IPPROTO_IPV6, IPV6_AUTH_TRANS_LEVEL,
-		    &optval, sizeof(optval)) == -1)
-			err(1, "setsockopt(IPV6_AUTH_TRANS_LEVEL)");
-		if (setsockopt(srecv, IPPROTO_IPV6, IPV6_AUTH_TRANS_LEVEL,
-		     &optval, sizeof(optval)) == -1)
-			err(1, "setsockopt(IPV6_AUTH_TRANS_LEVEL)");
-#else /* old def */
-		if (setsockopt(ssend, IPPROTO_IPV6, IPV6_AUTH_LEVEL,
-		    &optval, sizeof(optval)) == -1)
-			err(1, "setsockopt(IPV6_AUTH_LEVEL)");
-		if (setsockopt(srecv, IPPROTO_IPV6, IPV6_AUTH_LEVEL,
-		    &optval, sizeof(optval)) == -1)
-			err(1, "setsockopt(IPV6_AUTH_LEVEL)");
-#endif
-	}
-	if (options & F_ENCRYPT) {
-		optval = IPSEC_LEVEL_REQUIRE;
-		if (setsockopt(ssend, IPPROTO_IPV6, IPV6_ESP_TRANS_LEVEL,
-		    &optval, sizeof(optval)) == -1)
-			err(1, "setsockopt(IPV6_ESP_TRANS_LEVEL)");
-		if (setsockopt(srecv, IPPROTO_IPV6, IPV6_ESP_TRANS_LEVEL,
-		    &optval, sizeof(optval)) == -1)
-			err(1, "setsockopt(IPV6_ESP_TRANS_LEVEL)");
-	}
-#endif /*IPSEC_POLICY_IPSEC*/
-#endif
-
-#ifdef ICMP6_FILTER
-    {
-	struct icmp6_filter filt;
-	if (!(options & F_VERBOSE)) {
-		ICMP6_FILTER_SETBLOCKALL(&filt);
-		if ((options & F_FQDN) || (options & F_FQDNOLD) ||
-		    (options & F_NODEADDR) || (options & F_SUPTYPES))
-			ICMP6_FILTER_SETPASS(ICMP6_NI_REPLY, &filt);
-		else
-			ICMP6_FILTER_SETPASS(ICMP6_ECHO_REPLY, &filt);
-	} else {
-		ICMP6_FILTER_SETPASSALL(&filt);
-	}
-	if (setsockopt(srecv, IPPROTO_ICMPV6, ICMP6_FILTER, &filt,
-	    sizeof(filt)) < 0)
-		err(1, "setsockopt(ICMP6_FILTER)");
-    }
-#endif /*ICMP6_FILTER*/
-
-	/* let the kerel pass extension headers of incoming packets */
-	if ((options & F_VERBOSE) != 0) {
-		int opton = 1;
-
-#ifdef IPV6_RECVRTHDR
-		if (setsockopt(srecv, IPPROTO_IPV6, IPV6_RECVRTHDR, &opton,
-		    sizeof(opton)))
-			err(1, "setsockopt(IPV6_RECVRTHDR)");
-#else  /* old adv. API */
-		if (setsockopt(srecv, IPPROTO_IPV6, IPV6_RTHDR, &opton,
-		    sizeof(opton)))
-			err(1, "setsockopt(IPV6_RTHDR)");
-#endif
-	}
-
-/*
-	optval = 1;
-	if (IN6_IS_ADDR_MULTICAST(&dst.sin6_addr))
-		if (setsockopt(ssend, IPPROTO_IPV6, IPV6_MULTICAST_LOOP,
-		    &optval, sizeof(optval)) == -1)
-			err(1, "IPV6_MULTICAST_LOOP");
-*/
-
-	/* Specify the outgoing interface and/or the source address */
-	if (usepktinfo)
-		ip6optlen += CMSG_SPACE(sizeof(struct in6_pktinfo));
-
-	if (hoplimit != -1)
-		ip6optlen += CMSG_SPACE(sizeof(int));
-
-	/* set IP6 packet options */
-	if (ip6optlen) {
-		if ((scmsg = (char *)malloc(ip6optlen)) == NULL)
-			errx(1, "can't allocate enough memory");
-		smsghdr.msg_control = (caddr_t)scmsg;
-		smsghdr.msg_controllen = ip6optlen;
-		scmsgp = CMSG_FIRSTHDR(&smsghdr);
-	}
-	if (usepktinfo) {
-		cmsg_pktinfo = CMSG_DATA(scmsgp);
-		scmsgp->cmsg_len = CMSG_LEN(sizeof(struct in6_pktinfo));
-		scmsgp->cmsg_level = IPPROTO_IPV6;
-		scmsgp->cmsg_type = IPV6_PKTINFO;
-		scmsgp = CMSG_NXTHDR(&smsghdr, scmsgp);
-	}
-
-	/* set the outgoing interface */
-	if (ifname) {
-#ifndef USE_SIN6_SCOPE_ID
-		/* pktinfo must have already been allocated */
-		if ((pktinfo.ipi6_ifindex = if_nametoindex(ifname)) == 0)
-			errx(1, "%s: invalid interface name", ifname);
-#else
-		if ((dst.sin6_scope_id = if_nametoindex(ifname)) == 0)
-			errx(1, "%s: invalid interface name", ifname);
-#endif
-	}
-	if (hoplimit != -1) {
-		scmsgp->cmsg_len = CMSG_LEN(sizeof(int));
-		scmsgp->cmsg_level = IPPROTO_IPV6;
-		scmsgp->cmsg_type = IPV6_HOPLIMIT;
-		memcpy(CMSG_DATA(scmsgp), &hoplimit, sizeof(hoplimit));
-
-		scmsgp = CMSG_NXTHDR(&smsghdr, scmsgp);
-	}
-
-	if (tclass != -1) {
-		if (setsockopt(ssend, IPPROTO_IPV6, IPV6_TCLASS,
-		    &tclass, sizeof(tclass)) == -1)
-			err(1, "setsockopt(IPV6_TCLASS)");
-	}
-
-	if (pcp != -2) {
-		if (setsockopt(ssend, IPPROTO_IPV6, IPV6_VLAN_PCP,
-		    &pcp, sizeof(pcp)) == -1)
-			err(1, "setsockopt(IPV6_VLAN_PCP)");
-	}
-
-	if (argc > 1) {	/* some intermediate addrs are specified */
-		int hops;
-		int rthdrlen;
-
-		rthdrlen = inet6_rth_space(IPV6_RTHDR_TYPE_0, argc - 1);
-		scmsgp->cmsg_len = CMSG_LEN(rthdrlen);
-		scmsgp->cmsg_level = IPPROTO_IPV6;
-		scmsgp->cmsg_type = IPV6_RTHDR;
-		rthdr = (struct ip6_rthdr *)CMSG_DATA(scmsgp);
-		rthdr = inet6_rth_init((void *)rthdr, rthdrlen,
-		    IPV6_RTHDR_TYPE_0, argc - 1);
-		if (rthdr == NULL)
-			errx(1, "can't initialize rthdr");
-
-		for (hops = 0; hops < argc - 1; hops++) {
-			memset(&hints, 0, sizeof(hints));
-			hints.ai_family = AF_INET6;
-
-			if ((error = cap_getaddrinfo(capdns, argv[hops], NULL, &hints,
-			    &res)))
-				errx(1, "%s", gai_strerror(error));
-			if (res->ai_addr->sa_family != AF_INET6)
-				errx(1,
-				    "bad addr family of an intermediate addr");
-			sin6 = (struct sockaddr_in6 *)(void *)res->ai_addr;
-			if (inet6_rth_add(rthdr, &sin6->sin6_addr))
-				errx(1, "can't add an intermediate node");
-			freeaddrinfo(res);
-		}
-
-		scmsgp = CMSG_NXTHDR(&smsghdr, scmsgp);
-	}
-
-	/* From now on we will use only reverse DNS lookups. */
-#ifdef WITH_CASPER
-	if (capdns != NULL) {
-		const char *types[1];
-
-		types[0] = "ADDR2NAME";
-		if (cap_dns_type_limit(capdns, types, nitems(types)) < 0)
-			err(1, "unable to limit access to system.dns service");
-	}
-#endif
-	if (!(options & F_SRCADDR)) {
-		/*
-		 * get the source address. XXX since we revoked the root
-		 * privilege, we cannot use a raw socket for this.
-		 */
-		int dummy;
-		socklen_t len = sizeof(src);
-
-		if ((dummy = socket(AF_INET6, SOCK_DGRAM, 0)) < 0)
-			err(1, "UDP socket");
-
-		src.sin6_family = AF_INET6;
-		src.sin6_addr = dst.sin6_addr;
-		src.sin6_port = ntohs(DUMMY_PORT);
-		src.sin6_scope_id = dst.sin6_scope_id;
-
-		if (usepktinfo &&
-		    setsockopt(dummy, IPPROTO_IPV6, IPV6_PKTINFO,
-		    (void *)&pktinfo, sizeof(pktinfo)))
-			err(1, "UDP setsockopt(IPV6_PKTINFO)");
-
-		if (hoplimit != -1 &&
-		    setsockopt(dummy, IPPROTO_IPV6, IPV6_UNICAST_HOPS,
-		    (void *)&hoplimit, sizeof(hoplimit)))
-			err(1, "UDP setsockopt(IPV6_UNICAST_HOPS)");
-
-		if (hoplimit != -1 &&
-		    setsockopt(dummy, IPPROTO_IPV6, IPV6_MULTICAST_HOPS,
-		    (void *)&hoplimit, sizeof(hoplimit)))
-			err(1, "UDP setsockopt(IPV6_MULTICAST_HOPS)");
-
-		if (rthdr &&
-		    setsockopt(dummy, IPPROTO_IPV6, IPV6_RTHDR,
-		    (void *)rthdr, (rthdr->ip6r_len + 1) << 3))
-			err(1, "UDP setsockopt(IPV6_RTHDR)");
-
-		if (connect(dummy, (struct sockaddr *)&src, len) < 0)
-			err(1, "UDP connect");
-
-		if (getsockname(dummy, (struct sockaddr *)&src, &len) < 0)
-			err(1, "getsockname");
-
-		close(dummy);
-	}
-
-	/* Save pktinfo in the ancillary data. */
-	if (usepktinfo)
-		memcpy(cmsg_pktinfo, &pktinfo, sizeof(pktinfo));
-
-	if (connect(ssend, (struct sockaddr *)&dst, sizeof(dst)) != 0)
-		err(1, "connect() ssend");
-
-	caph_cache_catpages();
-	if (caph_enter_casper() < 0)
-		err(1, "caph_enter_casper");
-
-	cap_rights_init(&rights_stdin);
-	if (caph_rights_limit(STDIN_FILENO, &rights_stdin) < 0)
-		err(1, "caph_rights_limit stdin");
-	if (caph_limit_stdout() < 0)
-		err(1, "caph_limit_stdout");
-	if (caph_limit_stderr() < 0)
-		err(1, "caph_limit_stderr");
-
-	cap_rights_init(&rights_srecv, CAP_RECV, CAP_EVENT, CAP_SETSOCKOPT);
-	if (caph_rights_limit(srecv, &rights_srecv) < 0)
-		err(1, "caph_rights_limit srecv");
-	cap_rights_init(&rights_ssend, CAP_SEND, CAP_SETSOCKOPT);
-	if (caph_rights_limit(ssend, &rights_ssend) < 0)
-		err(1, "caph_rights_limit ssend");
-
-#if defined(SO_SNDBUF) && defined(SO_RCVBUF)
-	if (sockbufsize) {
-		if (datalen > (size_t)sockbufsize)
-			warnx("you need -b to increase socket buffer size");
-		if (setsockopt(ssend, SOL_SOCKET, SO_SNDBUF, &sockbufsize,
-		    sizeof(sockbufsize)) < 0)
-			err(1, "setsockopt(SO_SNDBUF)");
-		if (setsockopt(srecv, SOL_SOCKET, SO_RCVBUF, &sockbufsize,
-		    sizeof(sockbufsize)) < 0)
-			err(1, "setsockopt(SO_RCVBUF)");
-	}
-	else {
-		if (datalen > 8 * 1024)	/*XXX*/
-			warnx("you need -b to increase socket buffer size");
-		/*
-		 * When pinging the broadcast address, you can get a lot of
-		 * answers. Doing something so evil is useful if you are trying
-		 * to stress the ethernet, or just want to fill the arp cache
-		 * to get some stuff for /etc/ethers.
-		 */
-		hold = 48 * 1024;
-		setsockopt(srecv, SOL_SOCKET, SO_RCVBUF, (char *)&hold,
-		    sizeof(hold));
-	}
-#endif
-
-	optval = 1;
-#ifndef USE_SIN6_SCOPE_ID
-#ifdef IPV6_RECVPKTINFO
-	if (setsockopt(srecv, IPPROTO_IPV6, IPV6_RECVPKTINFO, &optval,
-	    sizeof(optval)) < 0)
-		warn("setsockopt(IPV6_RECVPKTINFO)"); /* XXX err? */
-#else  /* old adv. API */
-	if (setsockopt(srecv, IPPROTO_IPV6, IPV6_PKTINFO, &optval,
-	    sizeof(optval)) < 0)
-		warn("setsockopt(IPV6_PKTINFO)"); /* XXX err? */
-#endif
-#endif /* USE_SIN6_SCOPE_ID */
-#ifdef IPV6_RECVHOPLIMIT
-	if (setsockopt(srecv, IPPROTO_IPV6, IPV6_RECVHOPLIMIT, &optval,
-	    sizeof(optval)) < 0)
-		warn("setsockopt(IPV6_RECVHOPLIMIT)"); /* XXX err? */
-#else  /* old adv. API */
-	if (setsockopt(srecv, IPPROTO_IPV6, IPV6_HOPLIMIT, &optval,
-	    sizeof(optval)) < 0)
-		warn("setsockopt(IPV6_HOPLIMIT)"); /* XXX err? */
-#endif
-
-	cap_rights_clear(&rights_srecv, CAP_SETSOCKOPT);
-	if (caph_rights_limit(srecv, &rights_srecv) < 0)
-		err(1, "caph_rights_limit srecv setsockopt");
-	cap_rights_clear(&rights_ssend, CAP_SETSOCKOPT);
-	if (caph_rights_limit(ssend, &rights_ssend) < 0)
-		err(1, "caph_rights_limit ssend setsockopt");
-
-	printf("PING6(%lu=40+8+%lu bytes) ", (unsigned long)(40 + pingerlen()),
-	    (unsigned long)(pingerlen() - 8));
-	printf("%s --> ", pr_addr((struct sockaddr *)&src, sizeof(src)));
-	printf("%s\n", pr_addr((struct sockaddr *)&dst, sizeof(dst)));
-
-	if (preload == 0)
-		pinger();
-	else {
-		if (npackets != 0 && preload > npackets)
-			preload = npackets;
-		while (preload--)
-			pinger();
-	}
-	clock_gettime(CLOCK_MONOTONIC, &last);
-
-	sigemptyset(&si_sa.sa_mask);
-	si_sa.sa_flags = 0;
-	si_sa.sa_handler = onsignal;
-	if (sigaction(SIGINT, &si_sa, 0) == -1)
-		err(EX_OSERR, "sigaction SIGINT");
-	seenint = 0;
-#ifdef SIGINFO
-	if (sigaction(SIGINFO, &si_sa, 0) == -1)
-		err(EX_OSERR, "sigaction SIGINFO");
-	seeninfo = 0;
-#endif
-	if (alarmtimeout > 0) {
-		if (sigaction(SIGALRM, &si_sa, 0) == -1)
-			err(EX_OSERR, "sigaction SIGALRM");
-	}
-	if (options & F_FLOOD) {
-		intvl.tv_sec = 0;
-		intvl.tv_nsec = 10000000;
-	}
-
-	almost_done = 0;
-	while (seenint == 0) {
-		struct timespec now, timeout;
-		struct msghdr m;
-		struct iovec iov[2];
-		fd_set rfds;
-		int n;
-
-		/* signal handling */
-		if (seenint)
-			onint(SIGINT);
-#ifdef SIGINFO
-		if (seeninfo) {
-			summary();
-			seeninfo = 0;
-			continue;
-		}
-#endif
-		FD_ZERO(&rfds);
-		FD_SET(srecv, &rfds);
-		clock_gettime(CLOCK_MONOTONIC, &now);
-		timespecadd(&last, &intvl, &timeout);
-		timespecsub(&timeout, &now, &timeout);
-		if (timeout.tv_sec < 0)
-			timespecclear(&timeout);
-
-		n = pselect(srecv + 1, &rfds, NULL, NULL, &timeout, NULL);
-		if (n < 0)
-			continue;	/* EINTR */
-		if (n == 1) {
-			m.msg_name = (caddr_t)&from;
-			m.msg_namelen = sizeof(from);
-			memset(&iov, 0, sizeof(iov));
-			iov[0].iov_base = (caddr_t)packet;
-			iov[0].iov_len = packlen;
-			m.msg_iov = iov;
-			m.msg_iovlen = 1;
-			memset(cm, 0, CONTROLLEN);
-			m.msg_control = (void *)cm;
-			m.msg_controllen = CONTROLLEN;
-
-			cc = recvmsg(srecv, &m, 0);
-			if (cc < 0) {
-				if (errno != EINTR) {
-					warn("recvmsg");
-					sleep(1);
-				}
-				continue;
-			} else if (cc == 0) {
-				int mtu;
-
-				/*
-				 * receive control messages only. Process the
-				 * exceptions (currently the only possibility is
-				 * a path MTU notification.)
-				 */
-				if ((mtu = get_pathmtu(&m)) > 0) {
-					if ((options & F_VERBOSE) != 0) {
-						printf("new path MTU (%d) is "
-						    "notified\n", mtu);
-					}
-				}
-				continue;
-			} else {
-				/*
-				 * an ICMPv6 message (probably an echoreply)
-				 * arrived.
-				 */
-				pr_pack(packet, cc, &m);
-			}
-			if (((options & F_ONCE) != 0 && nreceived > 0) ||
-			    (npackets > 0 && nreceived >= npackets))
-				break;
-		}
-		if (n == 0 || (options & F_FLOOD)) {
-			if (npackets == 0 || ntransmitted < npackets)
-				pinger();
-			else {
-				if (almost_done)
-					break;
-				almost_done = 1;
-			/*
-			 * If we're not transmitting any more packets,
-			 * change the timer to wait two round-trip times
-			 * if we've received any packets or (waittime)
-			 * milliseconds if we haven't.
-			 */
-				intvl.tv_nsec = 0;
-				if (nreceived) {
-					intvl.tv_sec = 2 * tmax / 1000;
-					if (intvl.tv_sec == 0)
-						intvl.tv_sec = 1;
-				} else {
-					intvl.tv_sec = waittime / 1000;
-					intvl.tv_nsec =
-						waittime % 1000 * 1000000;
-				}
-			}
-			clock_gettime(CLOCK_MONOTONIC, &last);
-			if (ntransmitted - nreceived - 1 > nmissedmax) {
-				nmissedmax = ntransmitted - nreceived - 1;
-				if (options & F_MISSED)
-					(void)write(STDOUT_FILENO, &BBELL, 1);
-			}
-		}
-	}
-	sigemptyset(&si_sa.sa_mask);
-	si_sa.sa_flags = 0;
-	si_sa.sa_handler = SIG_IGN;
-	sigaction(SIGINT, &si_sa, 0);
-	sigaction(SIGALRM, &si_sa, 0);
-	summary();
-
-        if(packet != NULL)
-                free(packet);
-
-	if (nreceived > 0)
-		exit(0);
-	else if (ntransmitted > ntransmitfailures)
-		exit(2);
-	else
-		exit(EX_OSERR);
-}
-
-static void
-onsignal(int sig)
-{
-
-	switch (sig) {
-	case SIGINT:
-	case SIGALRM:
-		seenint++;
-		break;
-#ifdef SIGINFO
-	case SIGINFO:
-		seeninfo++;
-		break;
-#endif
-	}
-}
-
-/*
- * pinger --
- *	Compose and transmit an ICMP ECHO REQUEST packet.  The IP packet
- * will be added on by the kernel.  The ID field is our UNIX process ID,
- * and the sequence number is an ascending integer.  The first 8 bytes
- * of the data portion are used to hold a UNIX "timespec" struct in VAX
- * byte-order, to compute the round-trip time.
- */
-static size_t
-pingerlen(void)
-{
-	size_t l;
-
-	if (options & F_FQDN)
-		l = ICMP6_NIQLEN + sizeof(dst.sin6_addr);
-	else if (options & F_FQDNOLD)
-		l = ICMP6_NIQLEN;
-	else if (options & F_NODEADDR)
-		l = ICMP6_NIQLEN + sizeof(dst.sin6_addr);
-	else if (options & F_SUPTYPES)
-		l = ICMP6_NIQLEN;
-	else
-		l = ICMP6ECHOLEN + datalen;
-
-	return l;
-}
-
-static int
-pinger(void)
-{
-	struct icmp6_hdr *icp;
-	struct iovec iov[2];
-	int i, cc;
-	struct icmp6_nodeinfo *nip;
-	uint16_t seq;
-
-	if (npackets && ntransmitted >= npackets)
-		return(-1);	/* no more transmission */
-
-	icp = (struct icmp6_hdr *)outpack;
-	nip = (struct icmp6_nodeinfo *)outpack;
-	memset(icp, 0, sizeof(*icp));
-	icp->icmp6_cksum = 0;
-	seq = ntransmitted++;
-	CLR(seq % mx_dup_ck);
-
-	if (options & F_FQDN) {
-		uint16_t s;
-
-		icp->icmp6_type = ICMP6_NI_QUERY;
-		icp->icmp6_code = ICMP6_NI_SUBJ_IPV6;
-		nip->ni_qtype = htons(NI_QTYPE_FQDN);
-		nip->ni_flags = htons(0);
-
-		memcpy(nip->icmp6_ni_nonce, nonce,
-		    sizeof(nip->icmp6_ni_nonce));
-		s = htons(seq);
-		memcpy(nip->icmp6_ni_nonce, &s, sizeof(s));
-
-		memcpy(&outpack[ICMP6_NIQLEN], &dst.sin6_addr,
-		    sizeof(dst.sin6_addr));
-		cc = ICMP6_NIQLEN + sizeof(dst.sin6_addr);
-		datalen = 0;
-	} else if (options & F_FQDNOLD) {
-		uint16_t s;
-		/* packet format in 03 draft - no Subject data on queries */
-		icp->icmp6_type = ICMP6_NI_QUERY;
-		icp->icmp6_code = 0;	/* code field is always 0 */
-		nip->ni_qtype = htons(NI_QTYPE_FQDN);
-		nip->ni_flags = htons(0);
-
-		memcpy(nip->icmp6_ni_nonce, nonce,
-		    sizeof(nip->icmp6_ni_nonce));
-		s = htons(seq);
-		memcpy(nip->icmp6_ni_nonce, &s, sizeof(s));
-
-		cc = ICMP6_NIQLEN;
-		datalen = 0;
-	} else if (options & F_NODEADDR) {
-		uint16_t s;
-
-		icp->icmp6_type = ICMP6_NI_QUERY;
-		icp->icmp6_code = ICMP6_NI_SUBJ_IPV6;
-		nip->ni_qtype = htons(NI_QTYPE_NODEADDR);
-		nip->ni_flags = naflags;
-
-		memcpy(nip->icmp6_ni_nonce, nonce,
-		    sizeof(nip->icmp6_ni_nonce));
-		s = htons(seq);
-		memcpy(nip->icmp6_ni_nonce, &s, sizeof(s));
-
-		memcpy(&outpack[ICMP6_NIQLEN], &dst.sin6_addr,
-		    sizeof(dst.sin6_addr));
-		cc = ICMP6_NIQLEN + sizeof(dst.sin6_addr);
-		datalen = 0;
-	} else if (options & F_SUPTYPES) {
-		uint16_t s;
-
-		icp->icmp6_type = ICMP6_NI_QUERY;
-		icp->icmp6_code = ICMP6_NI_SUBJ_FQDN;	/*empty*/
-		nip->ni_qtype = htons(NI_QTYPE_SUPTYPES);
-		/* we support compressed bitmap */
-		nip->ni_flags = NI_SUPTYPE_FLAG_COMPRESS;
-
-		memcpy(nip->icmp6_ni_nonce, nonce,
-		    sizeof(nip->icmp6_ni_nonce));
-		s = htons(seq);
-		memcpy(nip->icmp6_ni_nonce, &s, sizeof(s));
-
-		cc = ICMP6_NIQLEN;
-		datalen = 0;
-	} else {
-		icp->icmp6_type = ICMP6_ECHO_REQUEST;
-		icp->icmp6_code = 0;
-		icp->icmp6_id = htons(ident);
-		icp->icmp6_seq = htons(seq);
-		if (timing) {
-			struct timespec tv;
-			struct tv32 tv32;
-			(void)clock_gettime(CLOCK_MONOTONIC, &tv);
-			/*
-			 * Truncate seconds down to 32 bits in order
-			 * to fit the timestamp within 8 bytes of the
-			 * packet. We're only concerned with
-			 * durations, not absolute times.
-			 */
-			tv32.tv32_sec = (uint32_t)htonl(tv.tv_sec);
-			tv32.tv32_nsec = (uint32_t)htonl(tv.tv_nsec);
-			memcpy(&outpack[ICMP6ECHOLEN], &tv32, sizeof(tv32));
-		}
-		cc = ICMP6ECHOLEN + datalen;
-	}
-
-#ifdef DIAGNOSTIC
-	if (pingerlen() != cc)
-		errx(1, "internal error; length mismatch");
-#endif
-
-	memset(&iov, 0, sizeof(iov));
-	iov[0].iov_base = (caddr_t)outpack;
-	iov[0].iov_len = cc;
-	smsghdr.msg_iov = iov;
-	smsghdr.msg_iovlen = 1;
-
-	i = sendmsg(ssend, &smsghdr, 0);
-
-	if (i < 0 || i != cc)  {
-		if (i < 0) {
-			ntransmitfailures++;
-			warn("sendmsg");
-		}
-		(void)printf("ping6: wrote %s %d chars, ret=%d\n",
-		    hostname, cc, i);
-	}
-	if (!(options & F_QUIET) && options & F_FLOOD)
-		(void)write(STDOUT_FILENO, &DOT, 1);
-
-	return(0);
-}
-
-static int
-myechoreply(const struct icmp6_hdr *icp)
-{
-	if (ntohs(icp->icmp6_id) == ident)
-		return 1;
-	else
-		return 0;
-}
-
-static int
-mynireply(const struct icmp6_nodeinfo *nip)
-{
-	if (memcmp(nip->icmp6_ni_nonce + sizeof(u_int16_t),
-	    nonce + sizeof(u_int16_t),
-	    sizeof(nonce) - sizeof(u_int16_t)) == 0)
-		return 1;
-	else
-		return 0;
-}
-
-/*
- * Decode a name from a DNS message.
- *
- * Format of the message is described in RFC 1035 subsection 4.1.4.
- *
- * Arguments:
- *   sp     - Pointer to a DNS pointer octet or to the first octet of a label
- *            in the message.
- *   ep     - Pointer to the end of the message (one step past the last octet).
- *   base   - Pointer to the beginning of the message.
- *   buf    - Buffer into which the decoded name will be saved.
- *   bufsiz - Size of the buffer 'buf'.
- *
- * Return value:
- *   Pointer to an octet immediately following the ending zero octet
- *   of the decoded label, or NULL if an error occured.
- */
-static const char *
-dnsdecode(const u_char *sp, const u_char *ep, const u_char *base, char *buf,
-	size_t bufsiz)
-{
-	int i;
-	const u_char *cp;
-	char cresult[MAXDNAME + 1];
-	const u_char *comp;
-	int l;
-
-	cp = sp;
-	*buf = '\0';
-
-	if (cp >= ep)
-		return NULL;
-	while (cp < ep) {
-		i = *cp;
-		if (i == 0 || cp != sp) {
-			if (strlcat((char *)buf, ".", bufsiz) >= bufsiz)
-				return NULL;	/*result overrun*/
-		}
-		if (i == 0)
-			break;
-		cp++;
-
-		if ((i & 0xc0) == 0xc0 && cp - base > (i & 0x3f)) {
-			/* DNS compression */
-			if (!base)
-				return NULL;
-
-			comp = base + (i & 0x3f);
-			if (dnsdecode(comp, cp, base, cresult,
-			    sizeof(cresult)) == NULL)
-				return NULL;
-			if (strlcat(buf, cresult, bufsiz) >= bufsiz)
-				return NULL;	/*result overrun*/
-			break;
-		} else if ((i & 0x3f) == i) {
-			if (i > ep - cp)
-				return NULL;	/*source overrun*/
-			while (i-- > 0 && cp < ep) {
-				l = snprintf(cresult, sizeof(cresult),
-				    isprint(*cp) ? "%c" : "\\%03o", *cp & 0xff);
-				if ((size_t)l >= sizeof(cresult) || l < 0)
-					return NULL;
-				if (strlcat(buf, cresult, bufsiz) >= bufsiz)
-					return NULL;	/*result overrun*/
-				cp++;
-			}
-		} else
-			return NULL;	/*invalid label*/
-	}
-	if (i != 0)
-		return NULL;	/*not terminated*/
-	cp++;
-	return cp;
-}
-
-/*
- * pr_pack --
- *	Print out the packet, if it came from us.  This logic is necessary
- * because ALL readers of the ICMP socket get a copy of ALL ICMP packets
- * which arrive ('tis only fair).  This permits multiple copies of this
- * program to be run without having intermingled output (or statistics!).
- */
-static void
-pr_pack(u_char *buf, int cc, struct msghdr *mhdr)
-{
-#define safeputc(c)	printf((isprint((c)) ? "%c" : "\\%03o"), c)
-	struct icmp6_hdr *icp;
-	struct icmp6_nodeinfo *ni;
-	int i;
-	int hoplim;
-	struct sockaddr *from;
-	int fromlen;
-	const u_char *cp = NULL;
-	u_char *dp, *end = buf + cc;
-	struct in6_pktinfo *pktinfo = NULL;
-	struct timespec tv, tp;
-	struct tv32 tpp;
-	double triptime = 0;
-	int dupflag;
-	size_t off;
-	int oldfqdn;
-	u_int16_t seq;
-	char dnsname[MAXDNAME + 1];
-
-	(void)clock_gettime(CLOCK_MONOTONIC, &tv);
-
-	if (!mhdr || !mhdr->msg_name ||
-	    mhdr->msg_namelen != sizeof(struct sockaddr_in6) ||
-	    ((struct sockaddr *)mhdr->msg_name)->sa_family != AF_INET6) {
-		if (options & F_VERBOSE)
-			warnx("invalid peername");
-		return;
-	}
-	from = (struct sockaddr *)mhdr->msg_name;
-	fromlen = mhdr->msg_namelen;
-	if (cc < (int)sizeof(struct icmp6_hdr)) {
-		if (options & F_VERBOSE)
-			warnx("packet too short (%d bytes) from %s", cc,
-			    pr_addr(from, fromlen));
-		return;
-	}
-	if (((mhdr->msg_flags & MSG_CTRUNC) != 0) &&
-	    (options & F_VERBOSE) != 0)
-		warnx("some control data discarded, insufficient buffer size");
-	icp = (struct icmp6_hdr *)buf;
-	ni = (struct icmp6_nodeinfo *)buf;
-	off = 0;
-
-	if ((hoplim = get_hoplim(mhdr)) == -1) {
-		warnx("failed to get receiving hop limit");
-		return;
-	}
-	if ((pktinfo = get_rcvpktinfo(mhdr)) == NULL) {
-		warnx("failed to get receiving packet information");
-		return;
-	}
-
-	if (icp->icmp6_type == ICMP6_ECHO_REPLY && myechoreply(icp)) {
-		seq = ntohs(icp->icmp6_seq);
-		++nreceived;
-		if (timing) {
-			memcpy(&tpp, icp + 1, sizeof(tpp));
-			tp.tv_sec = ntohl(tpp.tv32_sec);
-			tp.tv_nsec = ntohl(tpp.tv32_nsec);
-			timespecsub(&tv, &tp, &tv);
-			triptime = ((double)tv.tv_sec) * 1000.0 +
-			    ((double)tv.tv_nsec) / 1000000.0;
-			tsum += triptime;
-			tsumsq += triptime * triptime;
-			if (triptime < tmin)
-				tmin = triptime;
-			if (triptime > tmax)
-				tmax = triptime;
-		}
-
-		if (TST(seq % mx_dup_ck)) {
-			++nrepeats;
-			--nreceived;
-			dupflag = 1;
-		} else {
-			SET(seq % mx_dup_ck);
-			dupflag = 0;
-		}
-
-		if (options & F_QUIET)
-			return;
-
-		if (options & F_WAITTIME && triptime > waittime) {
-			++nrcvtimeout;
-			return;
-		}
-
-		if (options & F_FLOOD)
-			(void)write(STDOUT_FILENO, &BSPACE, 1);
-		else {
-			if (options & F_AUDIBLE)
-				(void)write(STDOUT_FILENO, &BBELL, 1);
-			(void)printf("%d bytes from %s, icmp_seq=%u", cc,
-			    pr_addr(from, fromlen), seq);
-			(void)printf(" hlim=%d", hoplim);
-			if ((options & F_VERBOSE) != 0) {
-				struct sockaddr_in6 dstsa;
-
-				memset(&dstsa, 0, sizeof(dstsa));
-				dstsa.sin6_family = AF_INET6;
-				dstsa.sin6_len = sizeof(dstsa);
-				dstsa.sin6_scope_id = pktinfo->ipi6_ifindex;
-				dstsa.sin6_addr = pktinfo->ipi6_addr;
-				(void)printf(" dst=%s",
-				    pr_addr((struct sockaddr *)&dstsa,
-				    sizeof(dstsa)));
-			}
-			if (timing)
-				(void)printf(" time=%.3f ms", triptime);
-			if (dupflag)
-				(void)printf("(DUP!)");
-			/* check the data */
-			cp = buf + off + ICMP6ECHOLEN + ICMP6ECHOTMLEN;
-			dp = outpack + ICMP6ECHOLEN + ICMP6ECHOTMLEN;
-			for (i = 8; cp < end; ++i, ++cp, ++dp) {
-				if (*cp != *dp) {
-					(void)printf("\nwrong data byte #%d should be 0x%x but was 0x%x", i, *dp, *cp);
-					break;
-				}
-			}
-		}
-	} else if (icp->icmp6_type == ICMP6_NI_REPLY && mynireply(ni)) {
-		memcpy(&seq, ni->icmp6_ni_nonce, sizeof(seq));
-		seq = ntohs(seq);
-		++nreceived;
-		if (TST(seq % mx_dup_ck)) {
-			++nrepeats;
-			--nreceived;
-			dupflag = 1;
-		} else {
-			SET(seq % mx_dup_ck);
-			dupflag = 0;
-		}
-
-		if (options & F_QUIET)
-			return;
-
-		(void)printf("%d bytes from %s: ", cc, pr_addr(from, fromlen));
-
-		switch (ntohs(ni->ni_code)) {
-		case ICMP6_NI_SUCCESS:
-			break;
-		case ICMP6_NI_REFUSED:
-			printf("refused, type 0x%x", ntohs(ni->ni_type));
-			goto fqdnend;
-		case ICMP6_NI_UNKNOWN:
-			printf("unknown, type 0x%x", ntohs(ni->ni_type));
-			goto fqdnend;
-		default:
-			printf("unknown code 0x%x, type 0x%x",
-			    ntohs(ni->ni_code), ntohs(ni->ni_type));
-			goto fqdnend;
-		}
-
-		switch (ntohs(ni->ni_qtype)) {
-		case NI_QTYPE_NOOP:
-			printf("NodeInfo NOOP");
-			break;
-		case NI_QTYPE_SUPTYPES:
-			pr_suptypes(ni, end - (u_char *)ni);
-			break;
-		case NI_QTYPE_NODEADDR:
-			pr_nodeaddr(ni, end - (u_char *)ni);
-			break;
-		case NI_QTYPE_FQDN:
-		default:	/* XXX: for backward compatibility */
-			cp = (u_char *)ni + ICMP6_NIRLEN;
-			if (buf[off + ICMP6_NIRLEN] ==
-			    cc - off - ICMP6_NIRLEN - 1)
-				oldfqdn = 1;
-			else
-				oldfqdn = 0;
-			if (oldfqdn) {
-				cp++;	/* skip length */
-				while (cp < end) {
-					safeputc(*cp & 0xff);
-					cp++;
-				}
-			} else {
-				i = 0;
-				while (cp < end) {
-					cp = dnsdecode((const u_char *)cp, end,
-					    (const u_char *)(ni + 1), dnsname,
-					    sizeof(dnsname));
-					if (cp == NULL) {
-						printf("???");
-						break;
-					}
-					/*
-					 * name-lookup special handling for
-					 * truncated name
-					 */
-					if (cp + 1 <= end && !*cp &&
-					    strlen(dnsname) > 0) {
-						dnsname[strlen(dnsname) - 1] = '\0';
-						cp++;
-					}
-					printf("%s%s", i > 0 ? "," : "",
-					    dnsname);
-				}
-			}
-			if (options & F_VERBOSE) {
-				u_long t;
-				int32_t ttl;
-				int comma = 0;
-
-				(void)printf(" (");	/*)*/
-
-				switch (ni->ni_code) {
-				case ICMP6_NI_REFUSED:
-					(void)printf("refused");
-					comma++;
-					break;
-				case ICMP6_NI_UNKNOWN:
-					(void)printf("unknown qtype");
-					comma++;
-					break;
-				}
-
-				if ((end - (u_char *)ni) < ICMP6_NIRLEN) {
-					/* case of refusion, unknown */
-					/*(*/
-					putchar(')');
-					goto fqdnend;
-				}
-				memcpy(&t, &buf[off+ICMP6ECHOLEN+8], sizeof(t));
-				ttl = (int32_t)ntohl(t);
-				if (comma)
-					printf(",");
-				if (!(ni->ni_flags & NI_FQDN_FLAG_VALIDTTL)) {
-					(void)printf("TTL=%d:meaningless",
-					    (int)ttl);
-				} else {
-					if (ttl < 0) {
-						(void)printf("TTL=%d:invalid",
-						   ttl);
-					} else
-						(void)printf("TTL=%d", ttl);
-				}
-				comma++;
-
-				if (oldfqdn) {
-					if (comma)
-						printf(",");
-					printf("03 draft");
-					comma++;
-				} else {
-					cp = (u_char *)ni + ICMP6_NIRLEN;
-					if (cp == end) {
-						if (comma)
-							printf(",");
-						printf("no name");
-						comma++;
-					}
-				}
-
-				if (buf[off + ICMP6_NIRLEN] !=
-				    cc - off - ICMP6_NIRLEN - 1 && oldfqdn) {
-					if (comma)
-						printf(",");
-					(void)printf("invalid namelen:%d/%lu",
-					    buf[off + ICMP6_NIRLEN],
-					    (u_long)cc - off - ICMP6_NIRLEN - 1);
-					comma++;
-				}
-				/*(*/
-				putchar(')');
-			}
-		fqdnend:
-			;
-		}
-	} else {
-		/* We've got something other than an ECHOREPLY */
-		if (!(options & F_VERBOSE))
-			return;
-		(void)printf("%d bytes from %s: ", cc, pr_addr(from, fromlen));
-		pr_icmph(icp, end);
-	}
-
-	if (!(options & F_FLOOD)) {
-		(void)putchar('\n');
-		if (options & F_VERBOSE)
-			pr_exthdrs(mhdr);
-		(void)fflush(stdout);
-	}
-#undef safeputc
-}
-
-static void
-pr_exthdrs(struct msghdr *mhdr)
-{
-	ssize_t	bufsize;
-	void	*bufp;
-	struct cmsghdr *cm;
-
-	bufsize = 0;
-	bufp = mhdr->msg_control;
-	for (cm = (struct cmsghdr *)CMSG_FIRSTHDR(mhdr); cm;
-	     cm = (struct cmsghdr *)CMSG_NXTHDR(mhdr, cm)) {
-		if (cm->cmsg_level != IPPROTO_IPV6)
-			continue;
-
-		bufsize = CONTROLLEN - ((caddr_t)CMSG_DATA(cm) - (caddr_t)bufp);
-		if (bufsize <= 0)
-			continue;
-		switch (cm->cmsg_type) {
-		case IPV6_HOPOPTS:
-			printf("  HbH Options: ");
-			pr_ip6opt(CMSG_DATA(cm), (size_t)bufsize);
-			break;
-		case IPV6_DSTOPTS:
-#ifdef IPV6_RTHDRDSTOPTS
-		case IPV6_RTHDRDSTOPTS:
-#endif
-			printf("  Dst Options: ");
-			pr_ip6opt(CMSG_DATA(cm), (size_t)bufsize);
-			break;
-		case IPV6_RTHDR:
-			printf("  Routing: ");
-			pr_rthdr(CMSG_DATA(cm), (size_t)bufsize);
-			break;
-		}
-	}
-}
-
-static void
-pr_ip6opt(void *extbuf, size_t bufsize)
-{
-	struct ip6_hbh *ext;
-	int currentlen;
-	u_int8_t type;
-	socklen_t extlen, len;
-	void *databuf;
-	size_t offset;
-	u_int16_t value2;
-	u_int32_t value4;
-
-	ext = (struct ip6_hbh *)extbuf;
-	extlen = (ext->ip6h_len + 1) * 8;
-	printf("nxt %u, len %u (%lu bytes)\n", ext->ip6h_nxt,
-	    (unsigned int)ext->ip6h_len, (unsigned long)extlen);
-
-	/*
-	 * Bounds checking on the ancillary data buffer:
-	 *     subtract the size of a cmsg structure from the buffer size.
-	 */
-	if (bufsize < (extlen  + CMSG_SPACE(0))) {
-		extlen = bufsize - CMSG_SPACE(0);
-		warnx("options truncated, showing only %u (total=%u)",
-		    (unsigned int)(extlen / 8 - 1),
-		    (unsigned int)(ext->ip6h_len));
-	}
-
-	currentlen = 0;
-	while (1) {
-		currentlen = inet6_opt_next(extbuf, extlen, currentlen,
-		    &type, &len, &databuf);
-		if (currentlen == -1)
-			break;
-		switch (type) {
-		/*
-		 * Note that inet6_opt_next automatically skips any padding
-		 * optins.
-		 */
-		case IP6OPT_JUMBO:
-			offset = 0;
-			offset = inet6_opt_get_val(databuf, offset,
-			    &value4, sizeof(value4));
-			printf("    Jumbo Payload Opt: Length %u\n",
-			    (u_int32_t)ntohl(value4));
-			break;
-		case IP6OPT_ROUTER_ALERT:
-			offset = 0;
-			offset = inet6_opt_get_val(databuf, offset,
-						   &value2, sizeof(value2));
-			printf("    Router Alert Opt: Type %u\n",
-			    ntohs(value2));
-			break;
-		default:
-			printf("    Received Opt %u len %lu\n",
-			    type, (unsigned long)len);
-			break;
-		}
-	}
-	return;
-}
-
-static void
-pr_rthdr(void *extbuf, size_t bufsize)
-{
-	struct in6_addr *in6;
-	char ntopbuf[INET6_ADDRSTRLEN];
-	struct ip6_rthdr *rh = (struct ip6_rthdr *)extbuf;
-	int i, segments, origsegs, rthsize, size0, size1;
-
-	/* print fixed part of the header */
-	printf("nxt %u, len %u (%d bytes), type %u, ", rh->ip6r_nxt,
-	    rh->ip6r_len, (rh->ip6r_len + 1) << 3, rh->ip6r_type);
-	if ((segments = inet6_rth_segments(extbuf)) >= 0) {
-		printf("%d segments, ", segments);
-		printf("%d left\n", rh->ip6r_segleft);
-	} else {
-		printf("segments unknown, ");
-		printf("%d left\n", rh->ip6r_segleft);
-		return;
-	}
-
-	/*
-	 * Bounds checking on the ancillary data buffer. When calculating
-	 * the number of items to show keep in mind:
-	 *	- The size of the cmsg structure
-	 *	- The size of one segment (the size of a Type 0 routing header)
-	 *	- When dividing add a fudge factor of one in case the
-	 *	  dividend is not evenly divisible by the divisor
-	 */
-	rthsize = (rh->ip6r_len + 1) * 8;
-	if (bufsize < (rthsize + CMSG_SPACE(0))) {
-		origsegs = segments;
-		size0 = inet6_rth_space(IPV6_RTHDR_TYPE_0, 0);
-		size1 = inet6_rth_space(IPV6_RTHDR_TYPE_0, 1);
-		segments -= (rthsize - (bufsize - CMSG_SPACE(0))) /
-		    (size1 - size0) + 1;
-		warnx("segments truncated, showing only %d (total=%d)",
-		    segments, origsegs);
-	}
-
-	for (i = 0; i < segments; i++) {
-		in6 = inet6_rth_getaddr(extbuf, i);
-		if (in6 == NULL)
-			printf("   [%d]<NULL>\n", i);
-		else {
-			if (!inet_ntop(AF_INET6, in6, ntopbuf,
-			    sizeof(ntopbuf)))
-				strlcpy(ntopbuf, "?", sizeof(ntopbuf));
-			printf("   [%d]%s\n", i, ntopbuf);
-		}
-	}
-
-	return;
-
-}
-
-static int
-pr_bitrange(u_int32_t v, int soff, int ii)
-{
-	int off;
-	int i;
-
-	off = 0;
-	while (off < 32) {
-		/* shift till we have 0x01 */
-		if ((v & 0x01) == 0) {
-			if (ii > 1)
-				printf("-%u", soff + off - 1);
-			ii = 0;
-			switch (v & 0x0f) {
-			case 0x00:
-				v >>= 4;
-				off += 4;
-				continue;
-			case 0x08:
-				v >>= 3;
-				off += 3;
-				continue;
-			case 0x04: case 0x0c:
-				v >>= 2;
-				off += 2;
-				continue;
-			default:
-				v >>= 1;
-				off += 1;
-				continue;
-			}
-		}
-
-		/* we have 0x01 with us */
-		for (i = 0; i < 32 - off; i++) {
-			if ((v & (0x01 << i)) == 0)
-				break;
-		}
-		if (!ii)
-			printf(" %u", soff + off);
-		ii += i;
-		v >>= i; off += i;
-	}
-	return ii;
-}
-
-static void
-pr_suptypes(struct icmp6_nodeinfo *ni, size_t nilen)
-	/* ni->qtype must be SUPTYPES */
-{
-	size_t clen;
-	u_int32_t v;
-	const u_char *cp, *end;
-	u_int16_t cur;
-	struct cbit {
-		u_int16_t words;	/*32bit count*/
-		u_int16_t skip;
-	} cbit;
-#define MAXQTYPES	(1 << 16)
-	size_t off;
-	int b;
-
-	cp = (u_char *)(ni + 1);
-	end = ((u_char *)ni) + nilen;
-	cur = 0;
-	b = 0;
-
-	printf("NodeInfo Supported Qtypes");
-	if (options & F_VERBOSE) {
-		if (ni->ni_flags & NI_SUPTYPE_FLAG_COMPRESS)
-			printf(", compressed bitmap");
-		else
-			printf(", raw bitmap");
-	}
-
-	while (cp < end) {
-		clen = (size_t)(end - cp);
-		if ((ni->ni_flags & NI_SUPTYPE_FLAG_COMPRESS) == 0) {
-			if (clen == 0 || clen > MAXQTYPES / 8 ||
-			    clen % sizeof(v)) {
-				printf("???");
-				return;
-			}
-		} else {
-			if (clen < sizeof(cbit) || clen % sizeof(v))
-				return;
-			memcpy(&cbit, cp, sizeof(cbit));
-			if (sizeof(cbit) + ntohs(cbit.words) * sizeof(v) >
-			    clen)
-				return;
-			cp += sizeof(cbit);
-			clen = ntohs(cbit.words) * sizeof(v);
-			if (cur + clen * 8 + (u_long)ntohs(cbit.skip) * 32 >
-			    MAXQTYPES)
-				return;
-		}
-
-		for (off = 0; off < clen; off += sizeof(v)) {
-			memcpy(&v, cp + off, sizeof(v));
-			v = (u_int32_t)ntohl(v);
-			b = pr_bitrange(v, (int)(cur + off * 8), b);
-		}
-		/* flush the remaining bits */
-		b = pr_bitrange(0, (int)(cur + off * 8), b);
-
-		cp += clen;
-		cur += clen * 8;
-		if ((ni->ni_flags & NI_SUPTYPE_FLAG_COMPRESS) != 0)
-			cur += ntohs(cbit.skip) * 32;
-	}
-}
-
-static void
-pr_nodeaddr(struct icmp6_nodeinfo *ni, int nilen)
-	/* ni->qtype must be NODEADDR */
-{
-	u_char *cp = (u_char *)(ni + 1);
-	char ntop_buf[INET6_ADDRSTRLEN];
-	int withttl = 0;
-
-	nilen -= sizeof(struct icmp6_nodeinfo);
-
-	if (options & F_VERBOSE) {
-		switch (ni->ni_code) {
-		case ICMP6_NI_REFUSED:
-			(void)printf("refused");
-			break;
-		case ICMP6_NI_UNKNOWN:
-			(void)printf("unknown qtype");
-			break;
-		}
-		if (ni->ni_flags & NI_NODEADDR_FLAG_TRUNCATE)
-			(void)printf(" truncated");
-	}
-	putchar('\n');
-	if (nilen <= 0)
-		printf("  no address\n");
-
-	/*
-	 * In icmp-name-lookups 05 and later, TTL of each returned address
-	 * is contained in the resposne. We try to detect the version
-	 * by the length of the data, but note that the detection algorithm
-	 * is incomplete. We assume the latest draft by default.
-	 */
-	if (nilen % (sizeof(u_int32_t) + sizeof(struct in6_addr)) == 0)
-		withttl = 1;
-	while (nilen > 0) {
-		u_int32_t ttl = 0;
-
-		if (withttl) {
-			uint32_t t;
-
-			memcpy(&t, cp, sizeof(t));
-			ttl = (u_int32_t)ntohl(t);
-			cp += sizeof(u_int32_t);
-			nilen -= sizeof(u_int32_t);
-		}
-
-		if (inet_ntop(AF_INET6, cp, ntop_buf, sizeof(ntop_buf)) ==
-		    NULL)
-			strlcpy(ntop_buf, "?", sizeof(ntop_buf));
-		printf("  %s", ntop_buf);
-		if (withttl) {
-			if (ttl == 0xffffffff) {
-				/*
-				 * XXX: can this convention be applied to all
-				 * type of TTL (i.e. non-ND TTL)?
-				 */
-				printf("(TTL=infty)");
-			}
-			else
-				printf("(TTL=%u)", ttl);
-		}
-		putchar('\n');
-
-		nilen -= sizeof(struct in6_addr);
-		cp += sizeof(struct in6_addr);
-	}
-}
-
-static int
-get_hoplim(struct msghdr *mhdr)
-{
-	struct cmsghdr *cm;
-
-	for (cm = (struct cmsghdr *)CMSG_FIRSTHDR(mhdr); cm;
-	     cm = (struct cmsghdr *)CMSG_NXTHDR(mhdr, cm)) {
-		if (cm->cmsg_len == 0)
-			return(-1);
-
-		if (cm->cmsg_level == IPPROTO_IPV6 &&
-		    cm->cmsg_type == IPV6_HOPLIMIT &&
-		    cm->cmsg_len == CMSG_LEN(sizeof(int))) {
-			int r;
-
-			memcpy(&r, CMSG_DATA(cm), sizeof(r));
-			return(r);
-		}
-	}
-
-	return(-1);
-}
-
-static struct in6_pktinfo *
-get_rcvpktinfo(struct msghdr *mhdr)
-{
-	static struct in6_pktinfo pi;
-	struct cmsghdr *cm;
-
-	for (cm = (struct cmsghdr *)CMSG_FIRSTHDR(mhdr); cm;
-	     cm = (struct cmsghdr *)CMSG_NXTHDR(mhdr, cm)) {
-		if (cm->cmsg_len == 0)
-			return(NULL);
-
-		if (cm->cmsg_level == IPPROTO_IPV6 &&
-		    cm->cmsg_type == IPV6_PKTINFO &&
-		    cm->cmsg_len == CMSG_LEN(sizeof(struct in6_pktinfo))) {
-			memcpy(&pi, CMSG_DATA(cm), sizeof(pi));
-			return(&pi);
-		}
-	}
-
-	return(NULL);
-}
-
-static int
-get_pathmtu(struct msghdr *mhdr)
-{
-#ifdef IPV6_RECVPATHMTU
-	struct cmsghdr *cm;
-	struct ip6_mtuinfo mtuctl;
-
-	for (cm = (struct cmsghdr *)CMSG_FIRSTHDR(mhdr); cm;
-	     cm = (struct cmsghdr *)CMSG_NXTHDR(mhdr, cm)) {
-		if (cm->cmsg_len == 0)
-			return(0);
-
-		if (cm->cmsg_level == IPPROTO_IPV6 &&
-		    cm->cmsg_type == IPV6_PATHMTU &&
-		    cm->cmsg_len == CMSG_LEN(sizeof(struct ip6_mtuinfo))) {
-			memcpy(&mtuctl, CMSG_DATA(cm), sizeof(mtuctl));
-
-			/*
-			 * If the notified destination is different from
-			 * the one we are pinging, just ignore the info.
-			 * We check the scope ID only when both notified value
-			 * and our own value have non-0 values, because we may
-			 * have used the default scope zone ID for sending,
-			 * in which case the scope ID value is 0.
-			 */
-			if (!IN6_ARE_ADDR_EQUAL(&mtuctl.ip6m_addr.sin6_addr,
-						&dst.sin6_addr) ||
-			    (mtuctl.ip6m_addr.sin6_scope_id &&
-			     dst.sin6_scope_id &&
-			     mtuctl.ip6m_addr.sin6_scope_id !=
-			     dst.sin6_scope_id)) {
-				if ((options & F_VERBOSE) != 0) {
-					printf("path MTU for %s is notified. "
-					       "(ignored)\n",
-					   pr_addr((struct sockaddr *)&mtuctl.ip6m_addr,
-					   sizeof(mtuctl.ip6m_addr)));
-				}
-				return(0);
-			}
-
-			/*
-			 * Ignore an invalid MTU. XXX: can we just believe
-			 * the kernel check?
-			 */
-			if (mtuctl.ip6m_mtu < IPV6_MMTU)
-				return(0);
-
-			/* notification for our destination. return the MTU. */
-			return((int)mtuctl.ip6m_mtu);
-		}
-	}
-#endif
-	return(0);
-}
-
-/*
- * onint --
- *	SIGINT handler.
- */
-/* ARGSUSED */
-static void
-onint(int notused __unused)
-{
-	/*
-	 * When doing reverse DNS lookups, the seenint flag might not
-	 * be noticed for a while.  Just exit if we get a second SIGINT.
-	 */
-	if ((options & F_HOSTNAME) && seenint != 0)
-		_exit(nreceived ? 0 : 2);
-}
-
-/*
- * summary --
- *	Print out statistics.
- */
-static void
-summary(void)
-{
-
-	(void)printf("\n--- %s ping6 statistics ---\n", hostname);
-	(void)printf("%ld packets transmitted, ", ntransmitted);
-	(void)printf("%ld packets received, ", nreceived);
-	if (nrepeats)
-		(void)printf("+%ld duplicates, ", nrepeats);
-	if (ntransmitted) {
-		if (nreceived > ntransmitted)
-			(void)printf("-- somebody's duplicating packets!");
-		else
-			(void)printf("%.1f%% packet loss",
-			    ((((double)ntransmitted - nreceived) * 100.0) /
-			    ntransmitted));
-	}
-	if (nrcvtimeout)
-		printf(", %ld packets out of wait time", nrcvtimeout);
-	(void)putchar('\n');
-	if (nreceived && timing) {
-		/* Only display average to microseconds */
-		double num = nreceived + nrepeats;
-		double avg = tsum / num;
-		double dev = sqrt(tsumsq / num - avg * avg);
-		(void)printf(
-		    "round-trip min/avg/max/std-dev = %.3f/%.3f/%.3f/%.3f ms\n",
-		    tmin, avg, tmax, dev);
-		(void)fflush(stdout);
-	}
-	(void)fflush(stdout);
-}
-
-/*subject type*/
-static const char *niqcode[] = {
-	"IPv6 address",
-	"DNS label",	/*or empty*/
-	"IPv4 address",
-};
-
-/*result code*/
-static const char *nircode[] = {
-	"Success", "Refused", "Unknown",
-};
-
-
-/*
- * pr_icmph --
- *	Print a descriptive string about an ICMP header.
- */
-static void
-pr_icmph(struct icmp6_hdr *icp, u_char *end)
-{
-	char ntop_buf[INET6_ADDRSTRLEN];
-	struct nd_redirect *red;
-	struct icmp6_nodeinfo *ni;
-	char dnsname[MAXDNAME + 1];
-	const u_char *cp;
-	size_t l;
-
-	switch (icp->icmp6_type) {
-	case ICMP6_DST_UNREACH:
-		switch (icp->icmp6_code) {
-		case ICMP6_DST_UNREACH_NOROUTE:
-			(void)printf("No Route to Destination\n");
-			break;
-		case ICMP6_DST_UNREACH_ADMIN:
-			(void)printf("Destination Administratively "
-			    "Unreachable\n");
-			break;
-		case ICMP6_DST_UNREACH_BEYONDSCOPE:
-			(void)printf("Destination Unreachable Beyond Scope\n");
-			break;
-		case ICMP6_DST_UNREACH_ADDR:
-			(void)printf("Destination Host Unreachable\n");
-			break;
-		case ICMP6_DST_UNREACH_NOPORT:
-			(void)printf("Destination Port Unreachable\n");
-			break;
-		default:
-			(void)printf("Destination Unreachable, Bad Code: %d\n",
-			    icp->icmp6_code);
-			break;
-		}
-		/* Print returned IP header information */
-		pr_retip((struct ip6_hdr *)(icp + 1), end);
-		break;
-	case ICMP6_PACKET_TOO_BIG:
-		(void)printf("Packet too big mtu = %d\n",
-		    (int)ntohl(icp->icmp6_mtu));
-		pr_retip((struct ip6_hdr *)(icp + 1), end);
-		break;
-	case ICMP6_TIME_EXCEEDED:
-		switch (icp->icmp6_code) {
-		case ICMP6_TIME_EXCEED_TRANSIT:
-			(void)printf("Time to live exceeded\n");
-			break;
-		case ICMP6_TIME_EXCEED_REASSEMBLY:
-			(void)printf("Frag reassembly time exceeded\n");
-			break;
-		default:
-			(void)printf("Time exceeded, Bad Code: %d\n",
-			    icp->icmp6_code);
-			break;
-		}
-		pr_retip((struct ip6_hdr *)(icp + 1), end);
-		break;
-	case ICMP6_PARAM_PROB:
-		(void)printf("Parameter problem: ");
-		switch (icp->icmp6_code) {
-		case ICMP6_PARAMPROB_HEADER:
-			(void)printf("Erroneous Header ");
-			break;
-		case ICMP6_PARAMPROB_NEXTHEADER:
-			(void)printf("Unknown Nextheader ");
-			break;
-		case ICMP6_PARAMPROB_OPTION:
-			(void)printf("Unrecognized Option ");
-			break;
-		default:
-			(void)printf("Bad code(%d) ", icp->icmp6_code);
-			break;
-		}
-		(void)printf("pointer = 0x%02x\n",
-		    (u_int32_t)ntohl(icp->icmp6_pptr));
-		pr_retip((struct ip6_hdr *)(icp + 1), end);
-		break;
-	case ICMP6_ECHO_REQUEST:
-		(void)printf("Echo Request");
-		/* XXX ID + Seq + Data */
-		break;
-	case ICMP6_ECHO_REPLY:
-		(void)printf("Echo Reply");
-		/* XXX ID + Seq + Data */
-		break;
-	case ICMP6_MEMBERSHIP_QUERY:
-		(void)printf("Listener Query");
-		break;
-	case ICMP6_MEMBERSHIP_REPORT:
-		(void)printf("Listener Report");
-		break;
-	case ICMP6_MEMBERSHIP_REDUCTION:
-		(void)printf("Listener Done");
-		break;
-	case ND_ROUTER_SOLICIT:
-		(void)printf("Router Solicitation");
-		break;
-	case ND_ROUTER_ADVERT:
-		(void)printf("Router Advertisement");
-		break;
-	case ND_NEIGHBOR_SOLICIT:
-		(void)printf("Neighbor Solicitation");
-		break;
-	case ND_NEIGHBOR_ADVERT:
-		(void)printf("Neighbor Advertisement");
-		break;
-	case ND_REDIRECT:
-		red = (struct nd_redirect *)icp;
-		(void)printf("Redirect\n");
-		if (!inet_ntop(AF_INET6, &red->nd_rd_dst, ntop_buf,
-		    sizeof(ntop_buf)))
-			strlcpy(ntop_buf, "?", sizeof(ntop_buf));
-		(void)printf("Destination: %s", ntop_buf);
-		if (!inet_ntop(AF_INET6, &red->nd_rd_target, ntop_buf,
-		    sizeof(ntop_buf)))
-			strlcpy(ntop_buf, "?", sizeof(ntop_buf));
-		(void)printf(" New Target: %s", ntop_buf);
-		break;
-	case ICMP6_NI_QUERY:
-		(void)printf("Node Information Query");
-		/* XXX ID + Seq + Data */
-		ni = (struct icmp6_nodeinfo *)icp;
-		l = end - (u_char *)(ni + 1);
-		printf(", ");
-		switch (ntohs(ni->ni_qtype)) {
-		case NI_QTYPE_NOOP:
-			(void)printf("NOOP");
-			break;
-		case NI_QTYPE_SUPTYPES:
-			(void)printf("Supported qtypes");
-			break;
-		case NI_QTYPE_FQDN:
-			(void)printf("DNS name");
-			break;
-		case NI_QTYPE_NODEADDR:
-			(void)printf("nodeaddr");
-			break;
-		case NI_QTYPE_IPV4ADDR:
-			(void)printf("IPv4 nodeaddr");
-			break;
-		default:
-			(void)printf("unknown qtype");
-			break;
-		}
-		if (options & F_VERBOSE) {
-			switch (ni->ni_code) {
-			case ICMP6_NI_SUBJ_IPV6:
-				if (l == sizeof(struct in6_addr) &&
-				    inet_ntop(AF_INET6, ni + 1, ntop_buf,
-				    sizeof(ntop_buf)) != NULL) {
-					(void)printf(", subject=%s(%s)",
-					    niqcode[ni->ni_code], ntop_buf);
-				} else {
-#if 1
-					/* backward compat to -W */
-					(void)printf(", oldfqdn");
-#else
-					(void)printf(", invalid");
-#endif
-				}
-				break;
-			case ICMP6_NI_SUBJ_FQDN:
-				if (end == (u_char *)(ni + 1)) {
-					(void)printf(", no subject");
-					break;
-				}
-				printf(", subject=%s", niqcode[ni->ni_code]);
-				cp = (const u_char *)(ni + 1);
-				cp = dnsdecode(cp, end, NULL, dnsname,
-				    sizeof(dnsname));
-				if (cp != NULL)
-					printf("(%s)", dnsname);
-				else
-					printf("(invalid)");
-				break;
-			case ICMP6_NI_SUBJ_IPV4:
-				if (l == sizeof(struct in_addr) &&
-				    inet_ntop(AF_INET, ni + 1, ntop_buf,
-				    sizeof(ntop_buf)) != NULL) {
-					(void)printf(", subject=%s(%s)",
-					    niqcode[ni->ni_code], ntop_buf);
-				} else
-					(void)printf(", invalid");
-				break;
-			default:
-				(void)printf(", invalid");
-				break;
-			}
-		}
-		break;
-	case ICMP6_NI_REPLY:
-		(void)printf("Node Information Reply");
-		/* XXX ID + Seq + Data */
-		ni = (struct icmp6_nodeinfo *)icp;
-		printf(", ");
-		switch (ntohs(ni->ni_qtype)) {
-		case NI_QTYPE_NOOP:
-			(void)printf("NOOP");
-			break;
-		case NI_QTYPE_SUPTYPES:
-			(void)printf("Supported qtypes");
-			break;
-		case NI_QTYPE_FQDN:
-			(void)printf("DNS name");
-			break;
-		case NI_QTYPE_NODEADDR:
-			(void)printf("nodeaddr");
-			break;
-		case NI_QTYPE_IPV4ADDR:
-			(void)printf("IPv4 nodeaddr");
-			break;
-		default:
-			(void)printf("unknown qtype");
-			break;
-		}
-		if (options & F_VERBOSE) {
-			if (ni->ni_code > nitems(nircode))
-				printf(", invalid");
-			else
-				printf(", %s", nircode[ni->ni_code]);
-		}
-		break;
-	default:
-		(void)printf("Bad ICMP type: %d", icp->icmp6_type);
-	}
-}
-
-/*
- * pr_iph --
- *	Print an IP6 header.
- */
-static void
-pr_iph(struct ip6_hdr *ip6)
-{
-	u_int32_t flow = ip6->ip6_flow & IPV6_FLOWLABEL_MASK;
-	u_int8_t tc;
-	char ntop_buf[INET6_ADDRSTRLEN];
-
-	tc = *(&ip6->ip6_vfc + 1); /* XXX */
-	tc = (tc >> 4) & 0x0f;
-	tc |= (ip6->ip6_vfc << 4);
-
-	printf("Vr TC  Flow Plen Nxt Hlim\n");
-	printf(" %1x %02x %05x %04x  %02x   %02x\n",
-	    (ip6->ip6_vfc & IPV6_VERSION_MASK) >> 4, tc, (u_int32_t)ntohl(flow),
-	    ntohs(ip6->ip6_plen), ip6->ip6_nxt, ip6->ip6_hlim);
-	if (!inet_ntop(AF_INET6, &ip6->ip6_src, ntop_buf, sizeof(ntop_buf)))
-		strlcpy(ntop_buf, "?", sizeof(ntop_buf));
-	printf("%s->", ntop_buf);
-	if (!inet_ntop(AF_INET6, &ip6->ip6_dst, ntop_buf, sizeof(ntop_buf)))
-		strlcpy(ntop_buf, "?", sizeof(ntop_buf));
-	printf("%s\n", ntop_buf);
-}
-
-/*
- * pr_addr --
- *	Return an ascii host address as a dotted quad and optionally with
- * a hostname.
- */
-static const char *
-pr_addr(struct sockaddr *addr, int addrlen)
-{
-	static char buf[NI_MAXHOST];
-	int flag = 0;
-
-	if ((options & F_HOSTNAME) == 0)
-		flag |= NI_NUMERICHOST;
-
-	if (cap_getnameinfo(capdns, addr, addrlen, buf, sizeof(buf), NULL, 0,
-		flag) == 0)
-		return (buf);
-	else
-		return "?";
-}
-
-/*
- * pr_retip --
- *	Dump some info on a returned (via ICMPv6) IPv6 packet.
- */
-static void
-pr_retip(struct ip6_hdr *ip6, u_char *end)
-{
-	u_char *cp = (u_char *)ip6, nh;
-	int hlen;
-
-	if ((size_t)(end - (u_char *)ip6) < sizeof(*ip6)) {
-		printf("IP6");
-		goto trunc;
-	}
-	pr_iph(ip6);
-	hlen = sizeof(*ip6);
-
-	nh = ip6->ip6_nxt;
-	cp += hlen;
-	while (end - cp >= 8) {
-		struct ah ah;
-
-		switch (nh) {
-		case IPPROTO_HOPOPTS:
-			printf("HBH ");
-			hlen = (((struct ip6_hbh *)cp)->ip6h_len+1) << 3;
-			nh = ((struct ip6_hbh *)cp)->ip6h_nxt;
-			break;
-		case IPPROTO_DSTOPTS:
-			printf("DSTOPT ");
-			hlen = (((struct ip6_dest *)cp)->ip6d_len+1) << 3;
-			nh = ((struct ip6_dest *)cp)->ip6d_nxt;
-			break;
-		case IPPROTO_FRAGMENT:
-			printf("FRAG ");
-			hlen = sizeof(struct ip6_frag);
-			nh = ((struct ip6_frag *)cp)->ip6f_nxt;
-			break;
-		case IPPROTO_ROUTING:
-			printf("RTHDR ");
-			hlen = (((struct ip6_rthdr *)cp)->ip6r_len+1) << 3;
-			nh = ((struct ip6_rthdr *)cp)->ip6r_nxt;
-			break;
-#ifdef IPSEC
-		case IPPROTO_AH:
-			printf("AH ");
-			memcpy(&ah, cp, sizeof(ah));
-			hlen = (ah.ah_len+2) << 2;
-			nh = ah.ah_nxt;
-			break;
-#endif
-		case IPPROTO_ICMPV6:
-			printf("ICMP6: type = %d, code = %d\n",
-			    *cp, *(cp + 1));
-			return;
-		case IPPROTO_ESP:
-			printf("ESP\n");
-			return;
-		case IPPROTO_TCP:
-			printf("TCP: from port %u, to port %u (decimal)\n",
-			    (*cp * 256 + *(cp + 1)),
-			    (*(cp + 2) * 256 + *(cp + 3)));
-			return;
-		case IPPROTO_UDP:
-			printf("UDP: from port %u, to port %u (decimal)\n",
-			    (*cp * 256 + *(cp + 1)),
-			    (*(cp + 2) * 256 + *(cp + 3)));
-			return;
-		default:
-			printf("Unknown Header(%d)\n", nh);
-			return;
-		}
-
-		if ((cp += hlen) >= end)
-			goto trunc;
-	}
-	if (end - cp < 8)
-		goto trunc;
-
-	putchar('\n');
-	return;
-
-  trunc:
-	printf("...\n");
-	return;
-}
-
-static void
-fill(char *bp, char *patp)
-{
-	int ii, jj, kk;
-	int pat[16];
-	char *cp;
-
-	for (cp = patp; *cp; cp++)
-		if (!isxdigit(*cp))
-			errx(1, "patterns must be specified as hex digits");
-	ii = sscanf(patp,
-	    "%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x",
-	    &pat[0], &pat[1], &pat[2], &pat[3], &pat[4], &pat[5], &pat[6],
-	    &pat[7], &pat[8], &pat[9], &pat[10], &pat[11], &pat[12],
-	    &pat[13], &pat[14], &pat[15]);
-
-/* xxx */
-	if (ii > 0)
-		for (kk = 0;
-		    (size_t)kk <= MAXDATALEN - 8 + sizeof(struct tv32) + ii;
-		    kk += ii)
-			for (jj = 0; jj < ii; ++jj)
-				bp[jj + kk] = pat[jj];
-	if (!(options & F_QUIET)) {
-		(void)printf("PATTERN: 0x");
-		for (jj = 0; jj < ii; ++jj)
-			(void)printf("%02x", bp[jj] & 0xFF);
-		(void)printf("\n");
-	}
-}
-
-#ifdef IPSEC
-#ifdef IPSEC_POLICY_IPSEC
-static int
-setpolicy(int so __unused, char *policy)
-{
-	char *buf;
-
-	if (policy == NULL)
-		return 0;	/* ignore */
-
-	buf = ipsec_set_policy(policy, strlen(policy));
-	if (buf == NULL)
-		errx(1, "%s", ipsec_strerror());
-	if (setsockopt(ssend, IPPROTO_IPV6, IPV6_IPSEC_POLICY, buf,
-	    ipsec_get_policylen(buf)) < 0)
-		warnx("Unable to set IPsec policy");
-	free(buf);
-
-	return 0;
-}
-#endif
-#endif
-
-static char *
-nigroup(char *name, int nig_oldmcprefix)
-{
-	char *p;
-	char *q;
-	MD5_CTX ctxt;
-	u_int8_t digest[16];
-	u_int8_t c;
-	size_t l;
-	char hbuf[NI_MAXHOST];
-	struct in6_addr in6;
-	int valid;
-
-	p = strchr(name, '.');
-	if (!p)
-		p = name + strlen(name);
-	l = p - name;
-	if (l > 63 || l > sizeof(hbuf) - 1)
-		return NULL;	/*label too long*/
-	strncpy(hbuf, name, l);
-	hbuf[(int)l] = '\0';
-
-	for (q = name; *q; q++) {
-		if (isupper(*(unsigned char *)q))
-			*q = tolower(*(unsigned char *)q);
-	}
-
-	/* generate 16 bytes of pseudo-random value. */
-	memset(&ctxt, 0, sizeof(ctxt));
-	MD5Init(&ctxt);
-	c = l & 0xff;
-	MD5Update(&ctxt, &c, sizeof(c));
-	MD5Update(&ctxt, (unsigned char *)name, l);
-	MD5Final(digest, &ctxt);
-
-	if (nig_oldmcprefix) {
-		/* draft-ietf-ipngwg-icmp-name-lookup */
-		valid = inet_pton(AF_INET6, "ff02::2:0000:0000", &in6);
-	} else {
-		/* RFC 4620 */
-		valid = inet_pton(AF_INET6, "ff02::2:ff00:0000", &in6);
-	}
-	if (valid != 1)
-		return NULL;	/*XXX*/
-
-	if (nig_oldmcprefix) {
-		/* draft-ietf-ipngwg-icmp-name-lookup */
-		bcopy(digest, &in6.s6_addr[12], 4);
-	} else {
-		/* RFC 4620 */
-		bcopy(digest, &in6.s6_addr[13], 3);
-	}
-
-	if (inet_ntop(AF_INET6, &in6, hbuf, sizeof(hbuf)) == NULL)
-		return NULL;
-
-	return strdup(hbuf);
-}
-
-static void
-usage(void)
-{
-	(void)fprintf(stderr,
-#if defined(IPSEC) && !defined(IPSEC_POLICY_IPSEC)
-	    "Z"
-#endif
-	    "usage: ping6 [-"
-	    "aADd"
-#if defined(IPSEC) && !defined(IPSEC_POLICY_IPSEC)
-	    "E"
-#endif
-	    "fHnNoOq"
-#ifdef IPV6_USE_MIN_MTU
-	    "u"
-#endif
-	    "vyY] "
-	    "[-b bufsiz] [-c count] [-e gateway]\n"
-	    "             [-I interface] [-i wait] [-k addrtype] [-l preload] "
-	    "[-m hoplimit]\n"
-	    "             [-p pattern]"
-#if defined(IPSEC) && defined(IPSEC_POLICY_IPSEC)
-	    " [-P policy]"
-#endif
-	    " [-S sourceaddr] [-s packetsize]\n"
-	    "             [-t timeout] [-W waittime] [-z tclass] [hops ...] "
-	    "host\n");
-	exit(1);
-}
-
-static cap_channel_t *
-capdns_setup(void)
-{
-	cap_channel_t *capcas, *capdnsloc;
-#ifdef WITH_CASPER
-	const char *types[2];
-	int families[1];
-#endif
-	capcas = cap_init();
-	if (capcas == NULL)
-		err(1, "unable to create casper process");
-	capdnsloc = cap_service_open(capcas, "system.dns");
-	/* Casper capability no longer needed. */
-	cap_close(capcas);
-	if (capdnsloc == NULL)
-		err(1, "unable to open system.dns service");
-#ifdef WITH_CASPER
-	types[0] = "NAME2ADDR";
-	types[1] = "ADDR2NAME";
-	if (cap_dns_type_limit(capdnsloc, types, nitems(types)) < 0)
-		err(1, "unable to limit access to system.dns service");
-	families[0] = AF_INET6;
-	if (cap_dns_family_limit(capdnsloc, families, nitems(families)) < 0)
-		err(1, "unable to limit access to system.dns service");
-#endif
-	return (capdnsloc);
-}
diff --git a/sbin/ping6/tests/Makefile b/sbin/ping6/tests/Makefile
deleted file mode 100644
index f773d23c294a..000000000000
--- a/sbin/ping6/tests/Makefile
+++ /dev/null
@@ -1,8 +0,0 @@
-# $FreeBSD$
-
-PACKAGE= tests
-
-ATF_TESTS_SH+=	ping6_test
-${PACKAGE}FILES+= ping6_c1_s8_t1.out
-
-.include <bsd.test.mk>
diff --git a/sbin/ping6/tests/ping6_c1_s8_t1.out b/sbin/ping6/tests/ping6_c1_s8_t1.out
deleted file mode 100644
index 81c56e6cf586..000000000000
--- a/sbin/ping6/tests/ping6_c1_s8_t1.out
+++ /dev/null
@@ -1,6 +0,0 @@
-PING6(56=40+8+8 bytes) ::1 --> ::1
-16 bytes from ::1, icmp_seq=0 hlim= time= ms
-
---- localhost ping6 statistics ---
-1 packets transmitted, 1 packets received, 0.0% packet loss
-round-trip min/avg/max/std-dev = /// ms
diff --git a/sbin/ping6/tests/ping6_test.sh b/sbin/ping6/tests/ping6_test.sh
deleted file mode 100644
index d7721d620614..000000000000
--- a/sbin/ping6/tests/ping6_test.sh
+++ /dev/null
@@ -1,53 +0,0 @@
-#
-# SPDX-License-Identifier: BSD-2-Clause-FreeBSD
-#
-# Copyright (C) 2019 Jan Sucan <jansucan@FreeBSD.org>
-# All rights reserved.
-#
-# Redistribution and use in source and binary forms, with or without
-# modification, are permitted provided that the following conditions
-# are met:
-# 1. Redistributions of source code must retain the above copyright
-#    notice, this list of conditions and the following disclaimer.
-# 2. 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.
-#
-# THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
-#
-# $FreeBSD$
-
-atf_test_case ping6_c1_s8_t1
-ping6_c1_s8_t1_head() {
-    atf_set "descr" "Stop after receiving 1 ECHO_RESPONSE packet"
-}
-ping6_c1_s8_t1_body() {
-    if ! getaddrinfo -f inet6 localhost 1>/dev/null 2>&1; then
-	atf_skip "IPv6 is not configured"
-    fi
-    atf_check -s exit:0 -o save:std.out -e empty \
-	      ping6 -c 1 -s 8 -t 1 localhost
-    check_ping_statistics std.out $(atf_get_srcdir)/ping6_c1_s8_t1.out
-}
-
-atf_init_test_cases() {
-    atf_add_test_case ping6_c1_s8_t1
-}
-
-check_ping_statistics() {
-    sed -e 's/0.[0-9]\{3\}//g' \
-	-e 's/[1-9][0-9]*.[0-9]\{3\}//g' \
-	-e 's/hlim=[0-9][0-9]*/hlim=/' \
-	"$1" >"$1".filtered
-    atf_check -s exit:0 diff -u "$1".filtered "$2"
-}