diff options
Diffstat (limited to 'sys/contrib/pf/net/if_pfsync.c')
| -rw-r--r-- | sys/contrib/pf/net/if_pfsync.c | 3474 |
1 files changed, 3474 insertions, 0 deletions
diff --git a/sys/contrib/pf/net/if_pfsync.c b/sys/contrib/pf/net/if_pfsync.c new file mode 100644 index 000000000000..7da6c2e9c2b8 --- /dev/null +++ b/sys/contrib/pf/net/if_pfsync.c @@ -0,0 +1,3474 @@ +/* $OpenBSD: if_pfsync.c,v 1.110 2009/02/24 05:39:19 dlg Exp $ */ + +/* + * Copyright (c) 2002 Michael Shalayeff + * 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 ``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 HIS RELATIVES 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 MIND, 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. + */ + +/* + * Copyright (c) 2009 David Gwynne <dlg@openbsd.org> + * + * Permission to use, copy, modify, and distribute this software for any + * purpose with or without fee is hereby granted, provided that the above + * copyright notice and this permission notice appear in all copies. + * + * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES + * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR + * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES + * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN + * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF + * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. + */ + +/* + * Revisions picked from OpenBSD after revision 1.110 import: + * 1.118, 1.124, 1.148, 1.149, 1.151, 1.171 - fixes to bulk updates + * 1.120, 1.175 - use monotonic time_uptime + * 1.122 - reduce number of updates for non-TCP sessions + * 1.128 - cleanups + * 1.146 - bzero() mbuf before sparsely filling it with data + * 1.170 - SIOCSIFMTU checks + * 1.126, 1.142 - deferred packets processing + * 1.173 - correct expire time processing + */ + +#ifdef __FreeBSD__ +#include "opt_inet.h" +#include "opt_inet6.h" +#include "opt_pf.h" + +#include <sys/cdefs.h> +__FBSDID("$FreeBSD$"); + +#define NBPFILTER 1 +#endif /* __FreeBSD__ */ + +#include <sys/param.h> +#include <sys/kernel.h> +#ifdef __FreeBSD__ +#include <sys/bus.h> +#include <sys/interrupt.h> +#include <sys/priv.h> +#endif +#include <sys/proc.h> +#include <sys/systm.h> +#include <sys/time.h> +#include <sys/mbuf.h> +#include <sys/socket.h> +#ifdef __FreeBSD__ +#include <sys/endian.h> +#include <sys/malloc.h> +#include <sys/module.h> +#include <sys/sockio.h> +#include <sys/taskqueue.h> +#include <sys/lock.h> +#include <sys/mutex.h> +#include <sys/protosw.h> +#else +#include <sys/ioctl.h> +#include <sys/timeout.h> +#endif +#include <sys/sysctl.h> +#ifndef __FreeBSD__ +#include <sys/pool.h> +#endif + +#include <net/if.h> +#ifdef __FreeBSD__ +#include <net/if_clone.h> +#endif +#include <net/if_types.h> +#include <net/route.h> +#include <net/bpf.h> +#include <net/netisr.h> +#ifdef __FreeBSD__ +#include <net/vnet.h> +#endif + +#include <netinet/in.h> +#include <netinet/if_ether.h> +#include <netinet/tcp.h> +#include <netinet/tcp_seq.h> + +#ifdef INET +#include <netinet/in_systm.h> +#include <netinet/in_var.h> +#include <netinet/ip.h> +#include <netinet/ip_var.h> +#endif + +#ifdef INET6 +#include <netinet6/nd6.h> +#endif /* INET6 */ + +#ifdef __FreeBSD__ +#include <netinet/ip_carp.h> +#else +#include "carp.h" +#if NCARP > 0 +#include <netinet/ip_carp.h> +#endif +#endif + +#include <net/pfvar.h> +#include <net/if_pfsync.h> + +#ifndef __FreeBSD__ +#include "bpfilter.h" +#include "pfsync.h" +#endif + +#define PFSYNC_MINPKT ( \ + sizeof(struct ip) + \ + sizeof(struct pfsync_header) + \ + sizeof(struct pfsync_subheader) + \ + sizeof(struct pfsync_eof)) + +struct pfsync_pkt { + struct ip *ip; + struct in_addr src; + u_int8_t flags; +}; + +int pfsync_input_hmac(struct mbuf *, int); + +int pfsync_upd_tcp(struct pf_state *, struct pfsync_state_peer *, + struct pfsync_state_peer *); + +int pfsync_in_clr(struct pfsync_pkt *, struct mbuf *, int, int); +int pfsync_in_ins(struct pfsync_pkt *, struct mbuf *, int, int); +int pfsync_in_iack(struct pfsync_pkt *, struct mbuf *, int, int); +int pfsync_in_upd(struct pfsync_pkt *, struct mbuf *, int, int); +int pfsync_in_upd_c(struct pfsync_pkt *, struct mbuf *, int, int); +int pfsync_in_ureq(struct pfsync_pkt *, struct mbuf *, int, int); +int pfsync_in_del(struct pfsync_pkt *, struct mbuf *, int, int); +int pfsync_in_del_c(struct pfsync_pkt *, struct mbuf *, int, int); +int pfsync_in_bus(struct pfsync_pkt *, struct mbuf *, int, int); +int pfsync_in_tdb(struct pfsync_pkt *, struct mbuf *, int, int); +int pfsync_in_eof(struct pfsync_pkt *, struct mbuf *, int, int); + +int pfsync_in_error(struct pfsync_pkt *, struct mbuf *, int, int); + +int (*pfsync_acts[])(struct pfsync_pkt *, struct mbuf *, int, int) = { + pfsync_in_clr, /* PFSYNC_ACT_CLR */ + pfsync_in_ins, /* PFSYNC_ACT_INS */ + pfsync_in_iack, /* PFSYNC_ACT_INS_ACK */ + pfsync_in_upd, /* PFSYNC_ACT_UPD */ + pfsync_in_upd_c, /* PFSYNC_ACT_UPD_C */ + pfsync_in_ureq, /* PFSYNC_ACT_UPD_REQ */ + pfsync_in_del, /* PFSYNC_ACT_DEL */ + pfsync_in_del_c, /* PFSYNC_ACT_DEL_C */ + pfsync_in_error, /* PFSYNC_ACT_INS_F */ + pfsync_in_error, /* PFSYNC_ACT_DEL_F */ + pfsync_in_bus, /* PFSYNC_ACT_BUS */ + pfsync_in_tdb, /* PFSYNC_ACT_TDB */ + pfsync_in_eof /* PFSYNC_ACT_EOF */ +}; + +struct pfsync_q { + int (*write)(struct pf_state *, struct mbuf *, int); + size_t len; + u_int8_t action; +}; + +/* we have one of these for every PFSYNC_S_ */ +int pfsync_out_state(struct pf_state *, struct mbuf *, int); +int pfsync_out_iack(struct pf_state *, struct mbuf *, int); +int pfsync_out_upd_c(struct pf_state *, struct mbuf *, int); +int pfsync_out_del(struct pf_state *, struct mbuf *, int); + +struct pfsync_q pfsync_qs[] = { + { pfsync_out_state, sizeof(struct pfsync_state), PFSYNC_ACT_INS }, + { pfsync_out_iack, sizeof(struct pfsync_ins_ack), PFSYNC_ACT_INS_ACK }, + { pfsync_out_state, sizeof(struct pfsync_state), PFSYNC_ACT_UPD }, + { pfsync_out_upd_c, sizeof(struct pfsync_upd_c), PFSYNC_ACT_UPD_C }, + { pfsync_out_del, sizeof(struct pfsync_del_c), PFSYNC_ACT_DEL_C } +}; + +void pfsync_q_ins(struct pf_state *, int); +void pfsync_q_del(struct pf_state *); + +struct pfsync_upd_req_item { + TAILQ_ENTRY(pfsync_upd_req_item) ur_entry; + struct pfsync_upd_req ur_msg; +}; +TAILQ_HEAD(pfsync_upd_reqs, pfsync_upd_req_item); + +struct pfsync_deferral { + TAILQ_ENTRY(pfsync_deferral) pd_entry; + struct pf_state *pd_st; + struct mbuf *pd_m; +#ifdef __FreeBSD__ + struct callout pd_tmo; +#else + struct timeout pd_tmo; +#endif +}; +TAILQ_HEAD(pfsync_deferrals, pfsync_deferral); + +#define PFSYNC_PLSIZE MAX(sizeof(struct pfsync_upd_req_item), \ + sizeof(struct pfsync_deferral)) + +#ifdef notyet +int pfsync_out_tdb(struct tdb *, struct mbuf *, int); +#endif + +struct pfsync_softc { +#ifdef __FreeBSD__ + struct ifnet *sc_ifp; +#else + struct ifnet sc_if; +#endif + struct ifnet *sc_sync_if; + +#ifdef __FreeBSD__ + uma_zone_t sc_pool; +#else + struct pool sc_pool; +#endif + + struct ip_moptions sc_imo; + + struct in_addr sc_sync_peer; + u_int8_t sc_maxupdates; +#ifdef __FreeBSD__ + int pfsync_sync_ok; +#endif + + struct ip sc_template; + + struct pf_state_queue sc_qs[PFSYNC_S_COUNT]; + size_t sc_len; + + struct pfsync_upd_reqs sc_upd_req_list; + + int sc_defer; + struct pfsync_deferrals sc_deferrals; + u_int sc_deferred; + + void *sc_plus; + size_t sc_pluslen; + + u_int32_t sc_ureq_sent; + int sc_bulk_tries; +#ifdef __FreeBSD__ + struct callout sc_bulkfail_tmo; +#else + struct timeout sc_bulkfail_tmo; +#endif + + u_int32_t sc_ureq_received; + struct pf_state *sc_bulk_next; + struct pf_state *sc_bulk_last; +#ifdef __FreeBSD__ + struct callout sc_bulk_tmo; +#else + struct timeout sc_bulk_tmo; +#endif + + TAILQ_HEAD(, tdb) sc_tdb_q; + +#ifdef __FreeBSD__ + struct callout sc_tmo; +#else + struct timeout sc_tmo; +#endif +}; + +#ifdef __FreeBSD__ +static MALLOC_DEFINE(M_PFSYNC, "pfsync", "pfsync data"); +static VNET_DEFINE(struct pfsync_softc *, pfsyncif) = NULL; +#define V_pfsyncif VNET(pfsyncif) +static VNET_DEFINE(void *, pfsync_swi_cookie) = NULL; +#define V_pfsync_swi_cookie VNET(pfsync_swi_cookie) +static VNET_DEFINE(struct pfsyncstats, pfsyncstats); +#define V_pfsyncstats VNET(pfsyncstats) +static VNET_DEFINE(int, pfsync_carp_adj) = CARP_MAXSKEW; +#define V_pfsync_carp_adj VNET(pfsync_carp_adj) + +static void pfsyncintr(void *); +static int pfsync_multicast_setup(struct pfsync_softc *); +static void pfsync_multicast_cleanup(struct pfsync_softc *); +static int pfsync_init(void); +static void pfsync_uninit(void); +static void pfsync_sendout1(int); + +#define schednetisr(NETISR_PFSYNC) swi_sched(V_pfsync_swi_cookie, 0) + +SYSCTL_NODE(_net, OID_AUTO, pfsync, CTLFLAG_RW, 0, "PFSYNC"); +SYSCTL_VNET_STRUCT(_net_pfsync, OID_AUTO, stats, CTLFLAG_RW, + &VNET_NAME(pfsyncstats), pfsyncstats, + "PFSYNC statistics (struct pfsyncstats, net/if_pfsync.h)"); +SYSCTL_INT(_net_pfsync, OID_AUTO, carp_demotion_factor, CTLFLAG_RW, + &VNET_NAME(pfsync_carp_adj), 0, "pfsync's CARP demotion factor adjustment"); +#else +struct pfsync_softc *pfsyncif = NULL; +struct pfsyncstats pfsyncstats; +#define V_pfsyncstats pfsyncstats +#endif + +void pfsyncattach(int); +#ifdef __FreeBSD__ +int pfsync_clone_create(struct if_clone *, int, caddr_t); +void pfsync_clone_destroy(struct ifnet *); +#else +int pfsync_clone_create(struct if_clone *, int); +int pfsync_clone_destroy(struct ifnet *); +#endif +int pfsync_alloc_scrub_memory(struct pfsync_state_peer *, + struct pf_state_peer *); +void pfsync_update_net_tdb(struct pfsync_tdb *); +int pfsyncoutput(struct ifnet *, struct mbuf *, struct sockaddr *, +#ifdef __FreeBSD__ + struct route *); +#else + struct rtentry *); +#endif +int pfsyncioctl(struct ifnet *, u_long, caddr_t); +void pfsyncstart(struct ifnet *); + +struct mbuf *pfsync_if_dequeue(struct ifnet *); + +void pfsync_deferred(struct pf_state *, int); +void pfsync_undefer(struct pfsync_deferral *, int); +void pfsync_defer_tmo(void *); + +void pfsync_request_update(u_int32_t, u_int64_t); +void pfsync_update_state_req(struct pf_state *); + +void pfsync_drop(struct pfsync_softc *); +void pfsync_sendout(void); +void pfsync_send_plus(void *, size_t); +void pfsync_timeout(void *); +void pfsync_tdb_timeout(void *); + +void pfsync_bulk_start(void); +void pfsync_bulk_status(u_int8_t); +void pfsync_bulk_update(void *); +void pfsync_bulk_fail(void *); + +#ifdef __FreeBSD__ +/* XXX: ugly */ +#define betoh64 (unsigned long long)be64toh +#define timeout_del callout_stop +#endif + +#define PFSYNC_MAX_BULKTRIES 12 +#ifndef __FreeBSD__ +int pfsync_sync_ok; +#endif + +#ifdef __FreeBSD__ +VNET_DEFINE(struct ifc_simple_data, pfsync_cloner_data); +VNET_DEFINE(struct if_clone, pfsync_cloner); +#define V_pfsync_cloner_data VNET(pfsync_cloner_data) +#define V_pfsync_cloner VNET(pfsync_cloner) +IFC_SIMPLE_DECLARE(pfsync, 1); +#else +struct if_clone pfsync_cloner = + IF_CLONE_INITIALIZER("pfsync", pfsync_clone_create, pfsync_clone_destroy); +#endif + +void +pfsyncattach(int npfsync) +{ + if_clone_attach(&pfsync_cloner); +} +int +#ifdef __FreeBSD__ +pfsync_clone_create(struct if_clone *ifc, int unit, caddr_t param) +#else +pfsync_clone_create(struct if_clone *ifc, int unit) +#endif +{ + struct pfsync_softc *sc; + struct ifnet *ifp; + int q; + + if (unit != 0) + return (EINVAL); + +#ifdef __FreeBSD__ + sc = malloc(sizeof(struct pfsync_softc), M_PFSYNC, M_WAITOK | M_ZERO); + sc->pfsync_sync_ok = 1; +#else + pfsync_sync_ok = 1; + sc = malloc(sizeof(*pfsyncif), M_DEVBUF, M_NOWAIT | M_ZERO); +#endif + + for (q = 0; q < PFSYNC_S_COUNT; q++) + TAILQ_INIT(&sc->sc_qs[q]); + +#ifdef __FreeBSD__ + sc->sc_pool = uma_zcreate("pfsync", PFSYNC_PLSIZE, NULL, NULL, NULL, + NULL, UMA_ALIGN_PTR, 0); +#else + pool_init(&sc->sc_pool, PFSYNC_PLSIZE, 0, 0, 0, "pfsync", NULL); +#endif + TAILQ_INIT(&sc->sc_upd_req_list); + TAILQ_INIT(&sc->sc_deferrals); + sc->sc_deferred = 0; + + TAILQ_INIT(&sc->sc_tdb_q); + + sc->sc_len = PFSYNC_MINPKT; + sc->sc_maxupdates = 128; + +#ifndef __FreeBSD__ + sc->sc_imo.imo_membership = (struct in_multi **)malloc( + (sizeof(struct in_multi *) * IP_MIN_MEMBERSHIPS), M_IPMOPTS, + M_WAITOK | M_ZERO); + sc->sc_imo.imo_max_memberships = IP_MIN_MEMBERSHIPS; +#endif + +#ifdef __FreeBSD__ + ifp = sc->sc_ifp = if_alloc(IFT_PFSYNC); + if (ifp == NULL) { + uma_zdestroy(sc->sc_pool); + free(sc, M_PFSYNC); + return (ENOSPC); + } + if_initname(ifp, ifc->ifc_name, unit); +#else + ifp = &sc->sc_if; + snprintf(ifp->if_xname, sizeof ifp->if_xname, "pfsync%d", unit); +#endif + ifp->if_softc = sc; + ifp->if_ioctl = pfsyncioctl; + ifp->if_output = pfsyncoutput; + ifp->if_start = pfsyncstart; + ifp->if_type = IFT_PFSYNC; + ifp->if_snd.ifq_maxlen = ifqmaxlen; + ifp->if_hdrlen = sizeof(struct pfsync_header); + ifp->if_mtu = ETHERMTU; +#ifdef __FreeBSD__ + callout_init(&sc->sc_tmo, CALLOUT_MPSAFE); + callout_init_mtx(&sc->sc_bulk_tmo, &pf_task_mtx, 0); + callout_init(&sc->sc_bulkfail_tmo, CALLOUT_MPSAFE); +#else + timeout_set(&sc->sc_tmo, pfsync_timeout, sc); + timeout_set(&sc->sc_bulk_tmo, pfsync_bulk_update, sc); + timeout_set(&sc->sc_bulkfail_tmo, pfsync_bulk_fail, sc); +#endif + + if_attach(ifp); +#ifndef __FreeBSD__ + if_alloc_sadl(ifp); + +#if NCARP > 0 + if_addgroup(ifp, "carp"); +#endif +#endif + +#if NBPFILTER > 0 +#ifdef __FreeBSD__ + bpfattach(ifp, DLT_PFSYNC, PFSYNC_HDRLEN); +#else + bpfattach(&sc->sc_if.if_bpf, ifp, DLT_PFSYNC, PFSYNC_HDRLEN); +#endif +#endif + +#ifdef __FreeBSD__ + V_pfsyncif = sc; +#else + pfsyncif = sc; +#endif + + return (0); +} + +#ifdef __FreeBSD__ +void +#else +int +#endif +pfsync_clone_destroy(struct ifnet *ifp) +{ + struct pfsync_softc *sc = ifp->if_softc; + +#ifdef __FreeBSD__ + PF_LOCK(); +#endif + timeout_del(&sc->sc_bulkfail_tmo); + timeout_del(&sc->sc_bulk_tmo); + timeout_del(&sc->sc_tmo); +#ifdef __FreeBSD__ + PF_UNLOCK(); + if (!sc->pfsync_sync_ok && carp_demote_adj_p) + (*carp_demote_adj_p)(-V_pfsync_carp_adj, "pfsync destroy"); +#else +#if NCARP > 0 + if (!pfsync_sync_ok) + carp_group_demote_adj(&sc->sc_if, -1); +#endif +#endif +#if NBPFILTER > 0 + bpfdetach(ifp); +#endif + if_detach(ifp); + + pfsync_drop(sc); + + while (sc->sc_deferred > 0) + pfsync_undefer(TAILQ_FIRST(&sc->sc_deferrals), 0); + +#ifdef __FreeBSD__ + UMA_DESTROY(sc->sc_pool); +#else + pool_destroy(&sc->sc_pool); +#endif +#ifdef __FreeBSD__ + if_free(ifp); + if (sc->sc_imo.imo_membership) + pfsync_multicast_cleanup(sc); + free(sc, M_PFSYNC); +#else + free(sc->sc_imo.imo_membership, M_IPMOPTS); + free(sc, M_DEVBUF); +#endif + +#ifdef __FreeBSD__ + V_pfsyncif = NULL; +#else + pfsyncif = NULL; +#endif + +#ifndef __FreeBSD__ + return (0); +#endif +} + +struct mbuf * +pfsync_if_dequeue(struct ifnet *ifp) +{ + struct mbuf *m; +#ifndef __FreeBSD__ + int s; +#endif + +#ifdef __FreeBSD__ + IF_LOCK(&ifp->if_snd); + _IF_DROP(&ifp->if_snd); + _IF_DEQUEUE(&ifp->if_snd, m); + IF_UNLOCK(&ifp->if_snd); +#else + s = splnet(); + IF_DEQUEUE(&ifp->if_snd, m); + splx(s); +#endif + + return (m); +} + +/* + * Start output on the pfsync interface. + */ +void +pfsyncstart(struct ifnet *ifp) +{ + struct mbuf *m; + + while ((m = pfsync_if_dequeue(ifp)) != NULL) { +#ifndef __FreeBSD__ + IF_DROP(&ifp->if_snd); +#endif + m_freem(m); + } +} + +int +pfsync_alloc_scrub_memory(struct pfsync_state_peer *s, + struct pf_state_peer *d) +{ + if (s->scrub.scrub_flag && d->scrub == NULL) { +#ifdef __FreeBSD__ + d->scrub = pool_get(&V_pf_state_scrub_pl, PR_NOWAIT | PR_ZERO); +#else + d->scrub = pool_get(&pf_state_scrub_pl, PR_NOWAIT | PR_ZERO); +#endif + if (d->scrub == NULL) + return (ENOMEM); + } + + return (0); +} + +#ifndef __FreeBSD__ +void +pfsync_state_export(struct pfsync_state *sp, struct pf_state *st) +{ + bzero(sp, sizeof(struct pfsync_state)); + + /* copy from state key */ + sp->key[PF_SK_WIRE].addr[0] = st->key[PF_SK_WIRE]->addr[0]; + sp->key[PF_SK_WIRE].addr[1] = st->key[PF_SK_WIRE]->addr[1]; + sp->key[PF_SK_WIRE].port[0] = st->key[PF_SK_WIRE]->port[0]; + sp->key[PF_SK_WIRE].port[1] = st->key[PF_SK_WIRE]->port[1]; + sp->key[PF_SK_STACK].addr[0] = st->key[PF_SK_STACK]->addr[0]; + sp->key[PF_SK_STACK].addr[1] = st->key[PF_SK_STACK]->addr[1]; + sp->key[PF_SK_STACK].port[0] = st->key[PF_SK_STACK]->port[0]; + sp->key[PF_SK_STACK].port[1] = st->key[PF_SK_STACK]->port[1]; + sp->proto = st->key[PF_SK_WIRE]->proto; + sp->af = st->key[PF_SK_WIRE]->af; + + /* copy from state */ + strlcpy(sp->ifname, st->kif->pfik_name, sizeof(sp->ifname)); + bcopy(&st->rt_addr, &sp->rt_addr, sizeof(sp->rt_addr)); + sp->creation = htonl(time_uptime - st->creation); + sp->expire = pf_state_expires(st); + if (sp->expire <= time_second) + sp->expire = htonl(0); + else + sp->expire = htonl(sp->expire - time_second); + + sp->direction = st->direction; + sp->log = st->log; + sp->timeout = st->timeout; + sp->state_flags = st->state_flags; + if (st->src_node) + sp->sync_flags |= PFSYNC_FLAG_SRCNODE; + if (st->nat_src_node) + sp->sync_flags |= PFSYNC_FLAG_NATSRCNODE; + + bcopy(&st->id, &sp->id, sizeof(sp->id)); + sp->creatorid = st->creatorid; + pf_state_peer_hton(&st->src, &sp->src); + pf_state_peer_hton(&st->dst, &sp->dst); + + if (st->rule.ptr == NULL) + sp->rule = htonl(-1); + else + sp->rule = htonl(st->rule.ptr->nr); + if (st->anchor.ptr == NULL) + sp->anchor = htonl(-1); + else + sp->anchor = htonl(st->anchor.ptr->nr); + if (st->nat_rule.ptr == NULL) + sp->nat_rule = htonl(-1); + else + sp->nat_rule = htonl(st->nat_rule.ptr->nr); + + pf_state_counter_hton(st->packets[0], sp->packets[0]); + pf_state_counter_hton(st->packets[1], sp->packets[1]); + pf_state_counter_hton(st->bytes[0], sp->bytes[0]); + pf_state_counter_hton(st->bytes[1], sp->bytes[1]); + +} +#endif + +int +pfsync_state_import(struct pfsync_state *sp, u_int8_t flags) +{ + struct pf_state *st = NULL; + struct pf_state_key *skw = NULL, *sks = NULL; + struct pf_rule *r = NULL; + struct pfi_kif *kif; + int pool_flags; + int error; + +#ifdef __FreeBSD__ + PF_LOCK_ASSERT(); + + if (sp->creatorid == 0 && V_pf_status.debug >= PF_DEBUG_MISC) { +#else + if (sp->creatorid == 0 && pf_status.debug >= PF_DEBUG_MISC) { +#endif + printf("pfsync_state_import: invalid creator id:" + " %08x\n", ntohl(sp->creatorid)); + return (EINVAL); + } + + if ((kif = pfi_kif_get(sp->ifname)) == NULL) { +#ifdef __FreeBSD__ + if (V_pf_status.debug >= PF_DEBUG_MISC) +#else + if (pf_status.debug >= PF_DEBUG_MISC) +#endif + printf("pfsync_state_import: " + "unknown interface: %s\n", sp->ifname); + if (flags & PFSYNC_SI_IOCTL) + return (EINVAL); + return (0); /* skip this state */ + } + + /* + * If the ruleset checksums match or the state is coming from the ioctl, + * it's safe to associate the state with the rule of that number. + */ + if (sp->rule != htonl(-1) && sp->anchor == htonl(-1) && + (flags & (PFSYNC_SI_IOCTL | PFSYNC_SI_CKSUM)) && ntohl(sp->rule) < + pf_main_ruleset.rules[PF_RULESET_FILTER].active.rcount) + r = pf_main_ruleset.rules[ + PF_RULESET_FILTER].active.ptr_array[ntohl(sp->rule)]; + else +#ifdef __FreeBSD__ + r = &V_pf_default_rule; +#else + r = &pf_default_rule; +#endif + + if ((r->max_states && r->states_cur >= r->max_states)) + goto cleanup; + +#ifdef __FreeBSD__ + if (flags & PFSYNC_SI_IOCTL) + pool_flags = PR_WAITOK | PR_ZERO; + else + pool_flags = PR_NOWAIT | PR_ZERO; + + if ((st = pool_get(&V_pf_state_pl, pool_flags)) == NULL) + goto cleanup; +#else + if (flags & PFSYNC_SI_IOCTL) + pool_flags = PR_WAITOK | PR_LIMITFAIL | PR_ZERO; + else + pool_flags = PR_LIMITFAIL | PR_ZERO; + + if ((st = pool_get(&pf_state_pl, pool_flags)) == NULL) + goto cleanup; +#endif + + if ((skw = pf_alloc_state_key(pool_flags)) == NULL) + goto cleanup; + + if (PF_ANEQ(&sp->key[PF_SK_WIRE].addr[0], + &sp->key[PF_SK_STACK].addr[0], sp->af) || + PF_ANEQ(&sp->key[PF_SK_WIRE].addr[1], + &sp->key[PF_SK_STACK].addr[1], sp->af) || + sp->key[PF_SK_WIRE].port[0] != sp->key[PF_SK_STACK].port[0] || + sp->key[PF_SK_WIRE].port[1] != sp->key[PF_SK_STACK].port[1]) { + if ((sks = pf_alloc_state_key(pool_flags)) == NULL) + goto cleanup; + } else + sks = skw; + + /* allocate memory for scrub info */ + if (pfsync_alloc_scrub_memory(&sp->src, &st->src) || + pfsync_alloc_scrub_memory(&sp->dst, &st->dst)) + goto cleanup; + + /* copy to state key(s) */ + skw->addr[0] = sp->key[PF_SK_WIRE].addr[0]; + skw->addr[1] = sp->key[PF_SK_WIRE].addr[1]; + skw->port[0] = sp->key[PF_SK_WIRE].port[0]; + skw->port[1] = sp->key[PF_SK_WIRE].port[1]; + skw->proto = sp->proto; + skw->af = sp->af; + if (sks != skw) { + sks->addr[0] = sp->key[PF_SK_STACK].addr[0]; + sks->addr[1] = sp->key[PF_SK_STACK].addr[1]; + sks->port[0] = sp->key[PF_SK_STACK].port[0]; + sks->port[1] = sp->key[PF_SK_STACK].port[1]; + sks->proto = sp->proto; + sks->af = sp->af; + } + + /* copy to state */ + bcopy(&sp->rt_addr, &st->rt_addr, sizeof(st->rt_addr)); + st->creation = time_uptime - ntohl(sp->creation); + st->expire = time_second; + if (sp->expire) { + uint32_t timeout; + + timeout = r->timeout[sp->timeout]; + if (!timeout) +#ifdef __FreeBSD__ + timeout = V_pf_default_rule.timeout[sp->timeout]; +#else + timeout = pf_default_rule.timeout[sp->timeout]; +#endif + + /* sp->expire may have been adaptively scaled by export. */ + st->expire -= timeout - ntohl(sp->expire); + } + + st->direction = sp->direction; + st->log = sp->log; + st->timeout = sp->timeout; + st->state_flags = sp->state_flags; + + bcopy(sp->id, &st->id, sizeof(st->id)); + st->creatorid = sp->creatorid; + pf_state_peer_ntoh(&sp->src, &st->src); + pf_state_peer_ntoh(&sp->dst, &st->dst); + + st->rule.ptr = r; + st->nat_rule.ptr = NULL; + st->anchor.ptr = NULL; + st->rt_kif = NULL; + + st->pfsync_time = time_uptime; + st->sync_state = PFSYNC_S_NONE; + + /* XXX when we have nat_rule/anchors, use STATE_INC_COUNTERS */ + r->states_cur++; + r->states_tot++; + + if (!ISSET(flags, PFSYNC_SI_IOCTL)) + SET(st->state_flags, PFSTATE_NOSYNC); + + if ((error = pf_state_insert(kif, skw, sks, st)) != 0) { + /* XXX when we have nat_rule/anchors, use STATE_DEC_COUNTERS */ + r->states_cur--; + goto cleanup_state; + } + + if (!ISSET(flags, PFSYNC_SI_IOCTL)) { + CLR(st->state_flags, PFSTATE_NOSYNC); + if (ISSET(st->state_flags, PFSTATE_ACK)) { + pfsync_q_ins(st, PFSYNC_S_IACK); + schednetisr(NETISR_PFSYNC); + } + } + CLR(st->state_flags, PFSTATE_ACK); + + return (0); + +cleanup: + error = ENOMEM; + if (skw == sks) + sks = NULL; +#ifdef __FreeBSD__ + if (skw != NULL) + pool_put(&V_pf_state_key_pl, skw); + if (sks != NULL) + pool_put(&V_pf_state_key_pl, sks); +#else + if (skw != NULL) + pool_put(&pf_state_key_pl, skw); + if (sks != NULL) + pool_put(&pf_state_key_pl, sks); +#endif + +cleanup_state: /* pf_state_insert frees the state keys */ + if (st) { +#ifdef __FreeBSD__ + if (st->dst.scrub) + pool_put(&V_pf_state_scrub_pl, st->dst.scrub); + if (st->src.scrub) + pool_put(&V_pf_state_scrub_pl, st->src.scrub); + pool_put(&V_pf_state_pl, st); +#else + if (st->dst.scrub) + pool_put(&pf_state_scrub_pl, st->dst.scrub); + if (st->src.scrub) + pool_put(&pf_state_scrub_pl, st->src.scrub); + pool_put(&pf_state_pl, st); +#endif + } + return (error); +} + +void +#ifdef __FreeBSD__ +pfsync_input(struct mbuf *m, __unused int off) +#else +pfsync_input(struct mbuf *m, ...) +#endif +{ +#ifdef __FreeBSD__ + struct pfsync_softc *sc = V_pfsyncif; +#else + struct pfsync_softc *sc = pfsyncif; +#endif + struct pfsync_pkt pkt; + struct ip *ip = mtod(m, struct ip *); + struct pfsync_header *ph; + struct pfsync_subheader subh; + + int offset; + int rv; + + V_pfsyncstats.pfsyncs_ipackets++; + + /* verify that we have a sync interface configured */ +#ifdef __FreeBSD__ + if (!sc || !sc->sc_sync_if || !V_pf_status.running) +#else + if (!sc || !sc->sc_sync_if || !pf_status.running) +#endif + goto done; + + /* verify that the packet came in on the right interface */ + if (sc->sc_sync_if != m->m_pkthdr.rcvif) { + V_pfsyncstats.pfsyncs_badif++; + goto done; + } + +#ifdef __FreeBSD__ + sc->sc_ifp->if_ipackets++; + sc->sc_ifp->if_ibytes += m->m_pkthdr.len; +#else + sc->sc_if.if_ipackets++; + sc->sc_if.if_ibytes += m->m_pkthdr.len; +#endif + /* verify that the IP TTL is 255. */ + if (ip->ip_ttl != PFSYNC_DFLTTL) { + V_pfsyncstats.pfsyncs_badttl++; + goto done; + } + + offset = ip->ip_hl << 2; + if (m->m_pkthdr.len < offset + sizeof(*ph)) { + V_pfsyncstats.pfsyncs_hdrops++; + goto done; + } + + if (offset + sizeof(*ph) > m->m_len) { + if (m_pullup(m, offset + sizeof(*ph)) == NULL) { + V_pfsyncstats.pfsyncs_hdrops++; + return; + } + ip = mtod(m, struct ip *); + } + ph = (struct pfsync_header *)((char *)ip + offset); + + /* verify the version */ + if (ph->version != PFSYNC_VERSION) { + V_pfsyncstats.pfsyncs_badver++; + goto done; + } + +#if 0 + if (pfsync_input_hmac(m, offset) != 0) { + /* XXX stats */ + goto done; + } +#endif + + /* Cheaper to grab this now than having to mess with mbufs later */ + pkt.ip = ip; + pkt.src = ip->ip_src; + pkt.flags = 0; + +#ifdef __FreeBSD__ + if (!bcmp(&ph->pfcksum, &V_pf_status.pf_chksum, PF_MD5_DIGEST_LENGTH)) +#else + if (!bcmp(&ph->pfcksum, &pf_status.pf_chksum, PF_MD5_DIGEST_LENGTH)) +#endif + pkt.flags |= PFSYNC_SI_CKSUM; + + offset += sizeof(*ph); + for (;;) { + m_copydata(m, offset, sizeof(subh), (caddr_t)&subh); + offset += sizeof(subh); + + if (subh.action >= PFSYNC_ACT_MAX) { + V_pfsyncstats.pfsyncs_badact++; + goto done; + } + + rv = (*pfsync_acts[subh.action])(&pkt, m, offset, + ntohs(subh.count)); + if (rv == -1) + return; + + offset += rv; + } + +done: + m_freem(m); +} + +int +pfsync_in_clr(struct pfsync_pkt *pkt, struct mbuf *m, int offset, int count) +{ + struct pfsync_clr *clr; + struct mbuf *mp; + int len = sizeof(*clr) * count; + int i, offp; + + struct pf_state *st, *nexts; + struct pf_state_key *sk, *nextsk; + struct pf_state_item *si; + u_int32_t creatorid; + int s; + + mp = m_pulldown(m, offset, len, &offp); + if (mp == NULL) { + V_pfsyncstats.pfsyncs_badlen++; + return (-1); + } + clr = (struct pfsync_clr *)(mp->m_data + offp); + + s = splsoftnet(); +#ifdef __FreeBSD__ + PF_LOCK(); +#endif + for (i = 0; i < count; i++) { + creatorid = clr[i].creatorid; + + if (clr[i].ifname[0] == '\0') { +#ifdef __FreeBSD__ + for (st = RB_MIN(pf_state_tree_id, &V_tree_id); + st; st = nexts) { + nexts = RB_NEXT(pf_state_tree_id, &V_tree_id, st); +#else + for (st = RB_MIN(pf_state_tree_id, &tree_id); + st; st = nexts) { + nexts = RB_NEXT(pf_state_tree_id, &tree_id, st); +#endif + if (st->creatorid == creatorid) { + SET(st->state_flags, PFSTATE_NOSYNC); + pf_unlink_state(st); + } + } + } else { + if (pfi_kif_get(clr[i].ifname) == NULL) + continue; + + /* XXX correct? */ +#ifdef __FreeBSD__ + for (sk = RB_MIN(pf_state_tree, &V_pf_statetbl); +#else + for (sk = RB_MIN(pf_state_tree, &pf_statetbl); +#endif + sk; sk = nextsk) { + nextsk = RB_NEXT(pf_state_tree, +#ifdef __FreeBSD__ + &V_pf_statetbl, sk); +#else + &pf_statetbl, sk); +#endif + TAILQ_FOREACH(si, &sk->states, entry) { + if (si->s->creatorid == creatorid) { + SET(si->s->state_flags, + PFSTATE_NOSYNC); + pf_unlink_state(si->s); + } + } + } + } + } +#ifdef __FreeBSD__ + PF_UNLOCK(); +#endif + splx(s); + + return (len); +} + +int +pfsync_in_ins(struct pfsync_pkt *pkt, struct mbuf *m, int offset, int count) +{ + struct mbuf *mp; + struct pfsync_state *sa, *sp; + int len = sizeof(*sp) * count; + int i, offp; + + int s; + + mp = m_pulldown(m, offset, len, &offp); + if (mp == NULL) { + V_pfsyncstats.pfsyncs_badlen++; + return (-1); + } + sa = (struct pfsync_state *)(mp->m_data + offp); + + s = splsoftnet(); +#ifdef __FreeBSD__ + PF_LOCK(); +#endif + for (i = 0; i < count; i++) { + sp = &sa[i]; + + /* check for invalid values */ + if (sp->timeout >= PFTM_MAX || + sp->src.state > PF_TCPS_PROXY_DST || + sp->dst.state > PF_TCPS_PROXY_DST || + sp->direction > PF_OUT || + (sp->af != AF_INET && sp->af != AF_INET6)) { +#ifdef __FreeBSD__ + if (V_pf_status.debug >= PF_DEBUG_MISC) { +#else + if (pf_status.debug >= PF_DEBUG_MISC) { +#endif + printf("pfsync_input: PFSYNC5_ACT_INS: " + "invalid value\n"); + } + V_pfsyncstats.pfsyncs_badval++; + continue; + } + + if (pfsync_state_import(sp, pkt->flags) == ENOMEM) { + /* drop out, but process the rest of the actions */ + break; + } + } +#ifdef __FreeBSD__ + PF_UNLOCK(); +#endif + splx(s); + + return (len); +} + +int +pfsync_in_iack(struct pfsync_pkt *pkt, struct mbuf *m, int offset, int count) +{ + struct pfsync_ins_ack *ia, *iaa; + struct pf_state_cmp id_key; + struct pf_state *st; + + struct mbuf *mp; + int len = count * sizeof(*ia); + int offp, i; + int s; + + mp = m_pulldown(m, offset, len, &offp); + if (mp == NULL) { + V_pfsyncstats.pfsyncs_badlen++; + return (-1); + } + iaa = (struct pfsync_ins_ack *)(mp->m_data + offp); + + s = splsoftnet(); +#ifdef __FreeBSD__ + PF_LOCK(); +#endif + for (i = 0; i < count; i++) { + ia = &iaa[i]; + + bcopy(&ia->id, &id_key.id, sizeof(id_key.id)); + id_key.creatorid = ia->creatorid; + + st = pf_find_state_byid(&id_key); + if (st == NULL) + continue; + + if (ISSET(st->state_flags, PFSTATE_ACK)) + pfsync_deferred(st, 0); + } +#ifdef __FreeBSD__ + PF_UNLOCK(); +#endif + splx(s); + /* + * XXX this is not yet implemented, but we know the size of the + * message so we can skip it. + */ + + return (count * sizeof(struct pfsync_ins_ack)); +} + +int +pfsync_upd_tcp(struct pf_state *st, struct pfsync_state_peer *src, + struct pfsync_state_peer *dst) +{ + int sfail = 0; + + /* + * The state should never go backwards except + * for syn-proxy states. Neither should the + * sequence window slide backwards. + */ + if (st->src.state > src->state && + (st->src.state < PF_TCPS_PROXY_SRC || + src->state >= PF_TCPS_PROXY_SRC)) + sfail = 1; + else if (SEQ_GT(st->src.seqlo, ntohl(src->seqlo))) + sfail = 3; + else if (st->dst.state > dst->state) { + /* There might still be useful + * information about the src state here, + * so import that part of the update, + * then "fail" so we send the updated + * state back to the peer who is missing + * our what we know. */ + pf_state_peer_ntoh(src, &st->src); + /* XXX do anything with timeouts? */ + sfail = 7; + } else if (st->dst.state >= TCPS_SYN_SENT && + SEQ_GT(st->dst.seqlo, ntohl(dst->seqlo))) + sfail = 4; + + return (sfail); +} + +int +pfsync_in_upd(struct pfsync_pkt *pkt, struct mbuf *m, int offset, int count) +{ + struct pfsync_state *sa, *sp; + struct pf_state_cmp id_key; + struct pf_state_key *sk; + struct pf_state *st; + int sfail; + + struct mbuf *mp; + int len = count * sizeof(*sp); + int offp, i; + int s; + + mp = m_pulldown(m, offset, len, &offp); + if (mp == NULL) { + V_pfsyncstats.pfsyncs_badlen++; + return (-1); + } + sa = (struct pfsync_state *)(mp->m_data + offp); + + s = splsoftnet(); +#ifdef __FreeBSD__ + PF_LOCK(); +#endif + for (i = 0; i < count; i++) { + sp = &sa[i]; + + /* check for invalid values */ + if (sp->timeout >= PFTM_MAX || + sp->src.state > PF_TCPS_PROXY_DST || + sp->dst.state > PF_TCPS_PROXY_DST) { +#ifdef __FreeBSD__ + if (V_pf_status.debug >= PF_DEBUG_MISC) { +#else + if (pf_status.debug >= PF_DEBUG_MISC) { +#endif + printf("pfsync_input: PFSYNC_ACT_UPD: " + "invalid value\n"); + } + V_pfsyncstats.pfsyncs_badval++; + continue; + } + + bcopy(sp->id, &id_key.id, sizeof(id_key.id)); + id_key.creatorid = sp->creatorid; + + st = pf_find_state_byid(&id_key); + if (st == NULL) { + /* insert the update */ + if (pfsync_state_import(sp, 0)) + V_pfsyncstats.pfsyncs_badstate++; + continue; + } + + if (ISSET(st->state_flags, PFSTATE_ACK)) + pfsync_deferred(st, 1); + + sk = st->key[PF_SK_WIRE]; /* XXX right one? */ + sfail = 0; + if (sk->proto == IPPROTO_TCP) + sfail = pfsync_upd_tcp(st, &sp->src, &sp->dst); + else { + /* + * Non-TCP protocol state machine always go + * forwards + */ + if (st->src.state > sp->src.state) + sfail = 5; + else if (st->dst.state > sp->dst.state) + sfail = 6; + } + + if (sfail) { +#ifdef __FreeBSD__ + if (V_pf_status.debug >= PF_DEBUG_MISC) { +#else + if (pf_status.debug >= PF_DEBUG_MISC) { +#endif + printf("pfsync: %s stale update (%d)" + " id: %016llx creatorid: %08x\n", + (sfail < 7 ? "ignoring" : "partial"), + sfail, betoh64(st->id), + ntohl(st->creatorid)); + } + V_pfsyncstats.pfsyncs_stale++; + + pfsync_update_state(st); + schednetisr(NETISR_PFSYNC); + continue; + } + pfsync_alloc_scrub_memory(&sp->dst, &st->dst); + pf_state_peer_ntoh(&sp->src, &st->src); + pf_state_peer_ntoh(&sp->dst, &st->dst); + st->expire = time_second; + st->timeout = sp->timeout; + st->pfsync_time = time_uptime; + } +#ifdef __FreeBSD__ + PF_UNLOCK(); +#endif + splx(s); + + return (len); +} + +int +pfsync_in_upd_c(struct pfsync_pkt *pkt, struct mbuf *m, int offset, int count) +{ + struct pfsync_upd_c *ua, *up; + struct pf_state_key *sk; + struct pf_state_cmp id_key; + struct pf_state *st; + + int len = count * sizeof(*up); + int sfail; + + struct mbuf *mp; + int offp, i; + int s; + + mp = m_pulldown(m, offset, len, &offp); + if (mp == NULL) { + V_pfsyncstats.pfsyncs_badlen++; + return (-1); + } + ua = (struct pfsync_upd_c *)(mp->m_data + offp); + + s = splsoftnet(); +#ifdef __FreeBSD__ + PF_LOCK(); +#endif + for (i = 0; i < count; i++) { + up = &ua[i]; + + /* check for invalid values */ + if (up->timeout >= PFTM_MAX || + up->src.state > PF_TCPS_PROXY_DST || + up->dst.state > PF_TCPS_PROXY_DST) { +#ifdef __FreeBSD__ + if (V_pf_status.debug >= PF_DEBUG_MISC) { +#else + if (pf_status.debug >= PF_DEBUG_MISC) { +#endif + printf("pfsync_input: " + "PFSYNC_ACT_UPD_C: " + "invalid value\n"); + } + V_pfsyncstats.pfsyncs_badval++; + continue; + } + + bcopy(&up->id, &id_key.id, sizeof(id_key.id)); + id_key.creatorid = up->creatorid; + + st = pf_find_state_byid(&id_key); + if (st == NULL) { + /* We don't have this state. Ask for it. */ + pfsync_request_update(id_key.creatorid, id_key.id); + continue; + } + + if (ISSET(st->state_flags, PFSTATE_ACK)) + pfsync_deferred(st, 1); + + sk = st->key[PF_SK_WIRE]; /* XXX right one? */ + sfail = 0; + if (sk->proto == IPPROTO_TCP) + sfail = pfsync_upd_tcp(st, &up->src, &up->dst); + else { + /* + * Non-TCP protocol state machine always go forwards + */ + if (st->src.state > up->src.state) + sfail = 5; + else if (st->dst.state > up->dst.state) + sfail = 6; + } + + if (sfail) { +#ifdef __FreeBSD__ + if (V_pf_status.debug >= PF_DEBUG_MISC) { +#else + if (pf_status.debug >= PF_DEBUG_MISC) { +#endif + printf("pfsync: ignoring stale update " + "(%d) id: %016llx " + "creatorid: %08x\n", sfail, + betoh64(st->id), + ntohl(st->creatorid)); + } + V_pfsyncstats.pfsyncs_stale++; + + pfsync_update_state(st); + schednetisr(NETISR_PFSYNC); + continue; + } + pfsync_alloc_scrub_memory(&up->dst, &st->dst); + pf_state_peer_ntoh(&up->src, &st->src); + pf_state_peer_ntoh(&up->dst, &st->dst); + st->expire = time_second; + st->timeout = up->timeout; + st->pfsync_time = time_uptime; + } +#ifdef __FreeBSD__ + PF_UNLOCK(); +#endif + splx(s); + + return (len); +} + +int +pfsync_in_ureq(struct pfsync_pkt *pkt, struct mbuf *m, int offset, int count) +{ + struct pfsync_upd_req *ur, *ura; + struct mbuf *mp; + int len = count * sizeof(*ur); + int i, offp; + + struct pf_state_cmp id_key; + struct pf_state *st; + + mp = m_pulldown(m, offset, len, &offp); + if (mp == NULL) { + V_pfsyncstats.pfsyncs_badlen++; + return (-1); + } + ura = (struct pfsync_upd_req *)(mp->m_data + offp); + +#ifdef __FreeBSD__ + PF_LOCK(); +#endif + for (i = 0; i < count; i++) { + ur = &ura[i]; + + bcopy(&ur->id, &id_key.id, sizeof(id_key.id)); + id_key.creatorid = ur->creatorid; + + if (id_key.id == 0 && id_key.creatorid == 0) + pfsync_bulk_start(); + else { + st = pf_find_state_byid(&id_key); + if (st == NULL) { + V_pfsyncstats.pfsyncs_badstate++; + continue; + } + if (ISSET(st->state_flags, PFSTATE_NOSYNC)) + continue; + + pfsync_update_state_req(st); + } + } +#ifdef __FreeBSD__ + PF_UNLOCK(); +#endif + + return (len); +} + +int +pfsync_in_del(struct pfsync_pkt *pkt, struct mbuf *m, int offset, int count) +{ + struct mbuf *mp; + struct pfsync_state *sa, *sp; + struct pf_state_cmp id_key; + struct pf_state *st; + int len = count * sizeof(*sp); + int offp, i; + int s; + + mp = m_pulldown(m, offset, len, &offp); + if (mp == NULL) { + V_pfsyncstats.pfsyncs_badlen++; + return (-1); + } + sa = (struct pfsync_state *)(mp->m_data + offp); + + s = splsoftnet(); +#ifdef __FreeBSD__ + PF_LOCK(); +#endif + for (i = 0; i < count; i++) { + sp = &sa[i]; + + bcopy(sp->id, &id_key.id, sizeof(id_key.id)); + id_key.creatorid = sp->creatorid; + + st = pf_find_state_byid(&id_key); + if (st == NULL) { + V_pfsyncstats.pfsyncs_badstate++; + continue; + } + SET(st->state_flags, PFSTATE_NOSYNC); + pf_unlink_state(st); + } +#ifdef __FreeBSD__ + PF_UNLOCK(); +#endif + splx(s); + + return (len); +} + +int +pfsync_in_del_c(struct pfsync_pkt *pkt, struct mbuf *m, int offset, int count) +{ + struct mbuf *mp; + struct pfsync_del_c *sa, *sp; + struct pf_state_cmp id_key; + struct pf_state *st; + int len = count * sizeof(*sp); + int offp, i; + int s; + + mp = m_pulldown(m, offset, len, &offp); + if (mp == NULL) { + V_pfsyncstats.pfsyncs_badlen++; + return (-1); + } + sa = (struct pfsync_del_c *)(mp->m_data + offp); + + s = splsoftnet(); +#ifdef __FreeBSD__ + PF_LOCK(); +#endif + for (i = 0; i < count; i++) { + sp = &sa[i]; + + bcopy(&sp->id, &id_key.id, sizeof(id_key.id)); + id_key.creatorid = sp->creatorid; + + st = pf_find_state_byid(&id_key); + if (st == NULL) { + V_pfsyncstats.pfsyncs_badstate++; + continue; + } + + SET(st->state_flags, PFSTATE_NOSYNC); + pf_unlink_state(st); + } +#ifdef __FreeBSD__ + PF_UNLOCK(); +#endif + splx(s); + + return (len); +} + +int +pfsync_in_bus(struct pfsync_pkt *pkt, struct mbuf *m, int offset, int count) +{ +#ifdef __FreeBSD__ + struct pfsync_softc *sc = V_pfsyncif; +#else + struct pfsync_softc *sc = pfsyncif; +#endif + struct pfsync_bus *bus; + struct mbuf *mp; + int len = count * sizeof(*bus); + int offp; + + /* If we're not waiting for a bulk update, who cares. */ + if (sc->sc_ureq_sent == 0) + return (len); + + mp = m_pulldown(m, offset, len, &offp); + if (mp == NULL) { + V_pfsyncstats.pfsyncs_badlen++; + return (-1); + } + bus = (struct pfsync_bus *)(mp->m_data + offp); + + switch (bus->status) { + case PFSYNC_BUS_START: +#ifdef __FreeBSD__ + callout_reset(&sc->sc_bulkfail_tmo, 4 * hz + + V_pf_pool_limits[PF_LIMIT_STATES].limit / + ((sc->sc_ifp->if_mtu - PFSYNC_MINPKT) / + sizeof(struct pfsync_state)), + pfsync_bulk_fail, V_pfsyncif); +#else + timeout_add(&sc->sc_bulkfail_tmo, 4 * hz + + pf_pool_limits[PF_LIMIT_STATES].limit / + ((sc->sc_if.if_mtu - PFSYNC_MINPKT) / + sizeof(struct pfsync_state))); +#endif +#ifdef __FreeBSD__ + if (V_pf_status.debug >= PF_DEBUG_MISC) +#else + if (pf_status.debug >= PF_DEBUG_MISC) +#endif + printf("pfsync: received bulk update start\n"); + break; + + case PFSYNC_BUS_END: + if (time_uptime - ntohl(bus->endtime) >= + sc->sc_ureq_sent) { + /* that's it, we're happy */ + sc->sc_ureq_sent = 0; + sc->sc_bulk_tries = 0; + timeout_del(&sc->sc_bulkfail_tmo); +#ifdef __FreeBSD__ + if (!sc->pfsync_sync_ok && carp_demote_adj_p) + (*carp_demote_adj_p)(-V_pfsync_carp_adj, + "pfsync bulk done"); + sc->pfsync_sync_ok = 1; +#else +#if NCARP > 0 + if (!pfsync_sync_ok) + carp_group_demote_adj(&sc->sc_if, -1); +#endif + pfsync_sync_ok = 1; +#endif +#ifdef __FreeBSD__ + if (V_pf_status.debug >= PF_DEBUG_MISC) +#else + if (pf_status.debug >= PF_DEBUG_MISC) +#endif + printf("pfsync: received valid " + "bulk update end\n"); + } else { +#ifdef __FreeBSD__ + if (V_pf_status.debug >= PF_DEBUG_MISC) +#else + if (pf_status.debug >= PF_DEBUG_MISC) +#endif + printf("pfsync: received invalid " + "bulk update end: bad timestamp\n"); + } + break; + } + + return (len); +} + +int +pfsync_in_tdb(struct pfsync_pkt *pkt, struct mbuf *m, int offset, int count) +{ + int len = count * sizeof(struct pfsync_tdb); + +#if defined(IPSEC) + struct pfsync_tdb *tp; + struct mbuf *mp; + int offp; + int i; + int s; + + mp = m_pulldown(m, offset, len, &offp); + if (mp == NULL) { + V_pfsyncstats.pfsyncs_badlen++; + return (-1); + } + tp = (struct pfsync_tdb *)(mp->m_data + offp); + + s = splsoftnet(); +#ifdef __FreeBSD__ + PF_LOCK(); +#endif + for (i = 0; i < count; i++) + pfsync_update_net_tdb(&tp[i]); +#ifdef __FreeBSD__ + PF_UNLOCK(); +#endif + splx(s); +#endif + + return (len); +} + +#if defined(IPSEC) +/* Update an in-kernel tdb. Silently fail if no tdb is found. */ +void +pfsync_update_net_tdb(struct pfsync_tdb *pt) +{ + struct tdb *tdb; + int s; + + /* check for invalid values */ + if (ntohl(pt->spi) <= SPI_RESERVED_MAX || + (pt->dst.sa.sa_family != AF_INET && + pt->dst.sa.sa_family != AF_INET6)) + goto bad; + + s = spltdb(); + tdb = gettdb(pt->spi, &pt->dst, pt->sproto); + if (tdb) { + pt->rpl = ntohl(pt->rpl); + pt->cur_bytes = betoh64(pt->cur_bytes); + + /* Neither replay nor byte counter should ever decrease. */ + if (pt->rpl < tdb->tdb_rpl || + pt->cur_bytes < tdb->tdb_cur_bytes) { + splx(s); + goto bad; + } + + tdb->tdb_rpl = pt->rpl; + tdb->tdb_cur_bytes = pt->cur_bytes; + } + splx(s); + return; + +bad: +#ifdef __FreeBSD__ + if (V_pf_status.debug >= PF_DEBUG_MISC) +#else + if (pf_status.debug >= PF_DEBUG_MISC) +#endif + printf("pfsync_insert: PFSYNC_ACT_TDB_UPD: " + "invalid value\n"); + V_pfsyncstats.pfsyncs_badstate++; + return; +} +#endif + + +int +pfsync_in_eof(struct pfsync_pkt *pkt, struct mbuf *m, int offset, int count) +{ + /* check if we are at the right place in the packet */ + if (offset != m->m_pkthdr.len - sizeof(struct pfsync_eof)) + V_pfsyncstats.pfsyncs_badact++; + + /* we're done. free and let the caller return */ + m_freem(m); + return (-1); +} + +int +pfsync_in_error(struct pfsync_pkt *pkt, struct mbuf *m, int offset, int count) +{ + V_pfsyncstats.pfsyncs_badact++; + + m_freem(m); + return (-1); +} + +int +pfsyncoutput(struct ifnet *ifp, struct mbuf *m, struct sockaddr *dst, +#ifdef __FreeBSD__ + struct route *rt) +#else + struct rtentry *rt) +#endif +{ + m_freem(m); + return (0); +} + +/* ARGSUSED */ +int +pfsyncioctl(struct ifnet *ifp, u_long cmd, caddr_t data) +{ +#ifndef __FreeBSD__ + struct proc *p = curproc; +#endif + struct pfsync_softc *sc = ifp->if_softc; + struct ifreq *ifr = (struct ifreq *)data; + struct ip_moptions *imo = &sc->sc_imo; + struct pfsyncreq pfsyncr; + struct ifnet *sifp; + struct ip *ip; + int s, error; + + switch (cmd) { +#if 0 + case SIOCSIFADDR: + case SIOCAIFADDR: + case SIOCSIFDSTADDR: +#endif + case SIOCSIFFLAGS: +#ifdef __FreeBSD__ + if (ifp->if_flags & IFF_UP) + ifp->if_drv_flags |= IFF_DRV_RUNNING; + else + ifp->if_drv_flags &= ~IFF_DRV_RUNNING; +#else + if (ifp->if_flags & IFF_UP) + ifp->if_flags |= IFF_RUNNING; + else + ifp->if_flags &= ~IFF_RUNNING; +#endif + break; + case SIOCSIFMTU: + if (!sc->sc_sync_if || + ifr->ifr_mtu <= PFSYNC_MINPKT || + ifr->ifr_mtu > sc->sc_sync_if->if_mtu) + return (EINVAL); + if (ifr->ifr_mtu < ifp->if_mtu) { + s = splnet(); +#ifdef __FreeBSD__ + PF_LOCK(); +#endif + pfsync_sendout(); +#ifdef __FreeBSD__ + PF_UNLOCK(); +#endif + splx(s); + } + ifp->if_mtu = ifr->ifr_mtu; + break; + case SIOCGETPFSYNC: + bzero(&pfsyncr, sizeof(pfsyncr)); + if (sc->sc_sync_if) { + strlcpy(pfsyncr.pfsyncr_syncdev, + sc->sc_sync_if->if_xname, IFNAMSIZ); + } + pfsyncr.pfsyncr_syncpeer = sc->sc_sync_peer; + pfsyncr.pfsyncr_maxupdates = sc->sc_maxupdates; + pfsyncr.pfsyncr_defer = sc->sc_defer; + return (copyout(&pfsyncr, ifr->ifr_data, sizeof(pfsyncr))); + + case SIOCSETPFSYNC: +#ifdef __FreeBSD__ + if ((error = priv_check(curthread, PRIV_NETINET_PF)) != 0) +#else + if ((error = suser(p, p->p_acflag)) != 0) +#endif + return (error); + if ((error = copyin(ifr->ifr_data, &pfsyncr, sizeof(pfsyncr)))) + return (error); + +#ifdef __FreeBSD__ + PF_LOCK(); +#endif + if (pfsyncr.pfsyncr_syncpeer.s_addr == 0) +#ifdef __FreeBSD__ + sc->sc_sync_peer.s_addr = htonl(INADDR_PFSYNC_GROUP); +#else + sc->sc_sync_peer.s_addr = INADDR_PFSYNC_GROUP; +#endif + else + sc->sc_sync_peer.s_addr = + pfsyncr.pfsyncr_syncpeer.s_addr; + + if (pfsyncr.pfsyncr_maxupdates > 255) +#ifdef __FreeBSD__ + { + PF_UNLOCK(); +#endif + return (EINVAL); +#ifdef __FreeBSD__ + } +#endif + sc->sc_maxupdates = pfsyncr.pfsyncr_maxupdates; + sc->sc_defer = pfsyncr.pfsyncr_defer; + + if (pfsyncr.pfsyncr_syncdev[0] == 0) { + sc->sc_sync_if = NULL; +#ifdef __FreeBSD__ + PF_UNLOCK(); + if (imo->imo_membership) + pfsync_multicast_cleanup(sc); +#else + if (imo->imo_num_memberships > 0) { + in_delmulti(imo->imo_membership[ + --imo->imo_num_memberships]); + imo->imo_multicast_ifp = NULL; + } +#endif + break; + } + +#ifdef __FreeBSD__ + PF_UNLOCK(); +#endif + if ((sifp = ifunit(pfsyncr.pfsyncr_syncdev)) == NULL) + return (EINVAL); + +#ifdef __FreeBSD__ + PF_LOCK(); +#endif + s = splnet(); +#ifdef __FreeBSD__ + if (sifp->if_mtu < sc->sc_ifp->if_mtu || +#else + if (sifp->if_mtu < sc->sc_if.if_mtu || +#endif + (sc->sc_sync_if != NULL && + sifp->if_mtu < sc->sc_sync_if->if_mtu) || + sifp->if_mtu < MCLBYTES - sizeof(struct ip)) + pfsync_sendout(); + sc->sc_sync_if = sifp; + +#ifdef __FreeBSD__ + if (imo->imo_membership) { + PF_UNLOCK(); + pfsync_multicast_cleanup(sc); + PF_LOCK(); + } +#else + if (imo->imo_num_memberships > 0) { + in_delmulti(imo->imo_membership[--imo->imo_num_memberships]); + imo->imo_multicast_ifp = NULL; + } +#endif + +#ifdef __FreeBSD__ + if (sc->sc_sync_if && + sc->sc_sync_peer.s_addr == htonl(INADDR_PFSYNC_GROUP)) { + PF_UNLOCK(); + error = pfsync_multicast_setup(sc); + if (error) + return (error); + PF_LOCK(); + } +#else + if (sc->sc_sync_if && + sc->sc_sync_peer.s_addr == INADDR_PFSYNC_GROUP) { + struct in_addr addr; + + if (!(sc->sc_sync_if->if_flags & IFF_MULTICAST)) { + sc->sc_sync_if = NULL; + splx(s); + return (EADDRNOTAVAIL); + } + + addr.s_addr = INADDR_PFSYNC_GROUP; + + if ((imo->imo_membership[0] = + in_addmulti(&addr, sc->sc_sync_if)) == NULL) { + sc->sc_sync_if = NULL; + splx(s); + return (ENOBUFS); + } + imo->imo_num_memberships++; + imo->imo_multicast_ifp = sc->sc_sync_if; + imo->imo_multicast_ttl = PFSYNC_DFLTTL; + imo->imo_multicast_loop = 0; + } +#endif /* !__FreeBSD__ */ + + ip = &sc->sc_template; + bzero(ip, sizeof(*ip)); + ip->ip_v = IPVERSION; + ip->ip_hl = sizeof(sc->sc_template) >> 2; + ip->ip_tos = IPTOS_LOWDELAY; + /* len and id are set later */ +#ifdef __FreeBSD__ + ip->ip_off = IP_DF; +#else + ip->ip_off = htons(IP_DF); +#endif + ip->ip_ttl = PFSYNC_DFLTTL; + ip->ip_p = IPPROTO_PFSYNC; + ip->ip_src.s_addr = INADDR_ANY; + ip->ip_dst.s_addr = sc->sc_sync_peer.s_addr; + + if (sc->sc_sync_if) { + /* Request a full state table update. */ + sc->sc_ureq_sent = time_uptime; +#ifdef __FreeBSD__ + if (sc->pfsync_sync_ok && carp_demote_adj_p) + (*carp_demote_adj_p)(V_pfsync_carp_adj, + "pfsync bulk start"); + sc->pfsync_sync_ok = 0; +#else +#if NCARP > 0 + if (pfsync_sync_ok) + carp_group_demote_adj(&sc->sc_if, 1); +#endif + pfsync_sync_ok = 0; +#endif +#ifdef __FreeBSD__ + if (V_pf_status.debug >= PF_DEBUG_MISC) +#else + if (pf_status.debug >= PF_DEBUG_MISC) +#endif + printf("pfsync: requesting bulk update\n"); +#ifdef __FreeBSD__ + callout_reset(&sc->sc_bulkfail_tmo, 5 * hz, + pfsync_bulk_fail, V_pfsyncif); +#else + timeout_add_sec(&sc->sc_bulkfail_tmo, 5); +#endif + pfsync_request_update(0, 0); + } +#ifdef __FreeBSD__ + PF_UNLOCK(); +#endif + splx(s); + + break; + + default: + return (ENOTTY); + } + + return (0); +} + +int +pfsync_out_state(struct pf_state *st, struct mbuf *m, int offset) +{ + struct pfsync_state *sp = (struct pfsync_state *)(m->m_data + offset); + + pfsync_state_export(sp, st); + + return (sizeof(*sp)); +} + +int +pfsync_out_iack(struct pf_state *st, struct mbuf *m, int offset) +{ + struct pfsync_ins_ack *iack = + (struct pfsync_ins_ack *)(m->m_data + offset); + + iack->id = st->id; + iack->creatorid = st->creatorid; + + return (sizeof(*iack)); +} + +int +pfsync_out_upd_c(struct pf_state *st, struct mbuf *m, int offset) +{ + struct pfsync_upd_c *up = (struct pfsync_upd_c *)(m->m_data + offset); + + bzero(up, sizeof(*up)); + up->id = st->id; + pf_state_peer_hton(&st->src, &up->src); + pf_state_peer_hton(&st->dst, &up->dst); + up->creatorid = st->creatorid; + up->timeout = st->timeout; + + return (sizeof(*up)); +} + +int +pfsync_out_del(struct pf_state *st, struct mbuf *m, int offset) +{ + struct pfsync_del_c *dp = (struct pfsync_del_c *)(m->m_data + offset); + + dp->id = st->id; + dp->creatorid = st->creatorid; + + SET(st->state_flags, PFSTATE_NOSYNC); + + return (sizeof(*dp)); +} + +void +pfsync_drop(struct pfsync_softc *sc) +{ + struct pf_state *st; + struct pfsync_upd_req_item *ur; +#ifdef notyet + struct tdb *t; +#endif + int q; + + for (q = 0; q < PFSYNC_S_COUNT; q++) { + if (TAILQ_EMPTY(&sc->sc_qs[q])) + continue; + + TAILQ_FOREACH(st, &sc->sc_qs[q], sync_list) { +#ifdef PFSYNC_DEBUG +#ifdef __FreeBSD__ + KASSERT(st->sync_state == q, + ("%s: st->sync_state == q", + __FUNCTION__)); +#else + KASSERT(st->sync_state == q); +#endif +#endif + st->sync_state = PFSYNC_S_NONE; + } + TAILQ_INIT(&sc->sc_qs[q]); + } + + while ((ur = TAILQ_FIRST(&sc->sc_upd_req_list)) != NULL) { + TAILQ_REMOVE(&sc->sc_upd_req_list, ur, ur_entry); + pool_put(&sc->sc_pool, ur); + } + + sc->sc_plus = NULL; + +#ifdef notyet + if (!TAILQ_EMPTY(&sc->sc_tdb_q)) { + TAILQ_FOREACH(t, &sc->sc_tdb_q, tdb_sync_entry) + CLR(t->tdb_flags, TDBF_PFSYNC); + + TAILQ_INIT(&sc->sc_tdb_q); + } +#endif + + sc->sc_len = PFSYNC_MINPKT; +} + +#ifdef __FreeBSD__ +void pfsync_sendout() +{ + pfsync_sendout1(1); +} + +static void +pfsync_sendout1(int schedswi) +{ + struct pfsync_softc *sc = V_pfsyncif; +#else +void +pfsync_sendout(void) +{ + struct pfsync_softc *sc = pfsyncif; +#endif +#if NBPFILTER > 0 +#ifdef __FreeBSD__ + struct ifnet *ifp = sc->sc_ifp; +#else + struct ifnet *ifp = &sc->sc_if; +#endif +#endif + struct mbuf *m; + struct ip *ip; + struct pfsync_header *ph; + struct pfsync_subheader *subh; + struct pf_state *st; + struct pfsync_upd_req_item *ur; +#ifdef notyet + struct tdb *t; +#endif + int offset; + int q, count = 0; + +#ifdef __FreeBSD__ + PF_LOCK_ASSERT(); +#else + splassert(IPL_NET); +#endif + + if (sc == NULL || sc->sc_len == PFSYNC_MINPKT) + return; + +#if NBPFILTER > 0 + if (ifp->if_bpf == NULL && sc->sc_sync_if == NULL) { +#else + if (sc->sc_sync_if == NULL) { +#endif + pfsync_drop(sc); + return; + } + +#ifdef __FreeBSD__ + m = m_get2(M_NOWAIT, MT_DATA, M_PKTHDR, max_linkhdr + sc->sc_len); + if (m == NULL) { + sc->sc_ifp->if_oerrors++; + V_pfsyncstats.pfsyncs_onomem++; + return; + } +#else + MGETHDR(m, M_DONTWAIT, MT_DATA); + if (m == NULL) { + sc->sc_if.if_oerrors++; + pfsyncstats.pfsyncs_onomem++; + pfsync_drop(sc); + return; + } + + if (max_linkhdr + sc->sc_len > MHLEN) { + MCLGETI(m, M_DONTWAIT, NULL, max_linkhdr + sc->sc_len); + if (!ISSET(m->m_flags, M_EXT)) { + m_free(m); + sc->sc_if.if_oerrors++; + pfsyncstats.pfsyncs_onomem++; + pfsync_drop(sc); + return; + } + } +#endif + m->m_data += max_linkhdr; + m->m_len = m->m_pkthdr.len = sc->sc_len; + + /* build the ip header */ + ip = (struct ip *)m->m_data; + bcopy(&sc->sc_template, ip, sizeof(*ip)); + offset = sizeof(*ip); + +#ifdef __FreeBSD__ + ip->ip_len = m->m_pkthdr.len; +#else + ip->ip_len = htons(m->m_pkthdr.len); +#endif + ip->ip_id = htons(ip_randomid()); + + /* build the pfsync header */ + ph = (struct pfsync_header *)(m->m_data + offset); + bzero(ph, sizeof(*ph)); + offset += sizeof(*ph); + + ph->version = PFSYNC_VERSION; + ph->len = htons(sc->sc_len - sizeof(*ip)); +#ifdef __FreeBSD__ + bcopy(V_pf_status.pf_chksum, ph->pfcksum, PF_MD5_DIGEST_LENGTH); +#else + bcopy(pf_status.pf_chksum, ph->pfcksum, PF_MD5_DIGEST_LENGTH); +#endif + + /* walk the queues */ + for (q = 0; q < PFSYNC_S_COUNT; q++) { + if (TAILQ_EMPTY(&sc->sc_qs[q])) + continue; + + subh = (struct pfsync_subheader *)(m->m_data + offset); + offset += sizeof(*subh); + + count = 0; + TAILQ_FOREACH(st, &sc->sc_qs[q], sync_list) { +#ifdef PFSYNC_DEBUG +#ifdef __FreeBSD__ + KASSERT(st->sync_state == q, + ("%s: st->sync_state == q", + __FUNCTION__)); +#else + KASSERT(st->sync_state == q); +#endif +#endif + + offset += pfsync_qs[q].write(st, m, offset); + st->sync_state = PFSYNC_S_NONE; + count++; + } + TAILQ_INIT(&sc->sc_qs[q]); + + bzero(subh, sizeof(*subh)); + subh->action = pfsync_qs[q].action; + subh->count = htons(count); + } + + if (!TAILQ_EMPTY(&sc->sc_upd_req_list)) { + subh = (struct pfsync_subheader *)(m->m_data + offset); + offset += sizeof(*subh); + + count = 0; + while ((ur = TAILQ_FIRST(&sc->sc_upd_req_list)) != NULL) { + TAILQ_REMOVE(&sc->sc_upd_req_list, ur, ur_entry); + + bcopy(&ur->ur_msg, m->m_data + offset, + sizeof(ur->ur_msg)); + offset += sizeof(ur->ur_msg); + + pool_put(&sc->sc_pool, ur); + + count++; + } + + bzero(subh, sizeof(*subh)); + subh->action = PFSYNC_ACT_UPD_REQ; + subh->count = htons(count); + } + + /* has someone built a custom region for us to add? */ + if (sc->sc_plus != NULL) { + bcopy(sc->sc_plus, m->m_data + offset, sc->sc_pluslen); + offset += sc->sc_pluslen; + + sc->sc_plus = NULL; + } + +#ifdef notyet + if (!TAILQ_EMPTY(&sc->sc_tdb_q)) { + subh = (struct pfsync_subheader *)(m->m_data + offset); + offset += sizeof(*subh); + + count = 0; + TAILQ_FOREACH(t, &sc->sc_tdb_q, tdb_sync_entry) { + offset += pfsync_out_tdb(t, m, offset); + CLR(t->tdb_flags, TDBF_PFSYNC); + + count++; + } + TAILQ_INIT(&sc->sc_tdb_q); + + bzero(subh, sizeof(*subh)); + subh->action = PFSYNC_ACT_TDB; + subh->count = htons(count); + } +#endif + + subh = (struct pfsync_subheader *)(m->m_data + offset); + offset += sizeof(*subh); + + bzero(subh, sizeof(*subh)); + subh->action = PFSYNC_ACT_EOF; + subh->count = htons(1); + + /* XXX write checksum in EOF here */ + + /* we're done, let's put it on the wire */ +#if NBPFILTER > 0 + if (ifp->if_bpf) { + m->m_data += sizeof(*ip); + m->m_len = m->m_pkthdr.len = sc->sc_len - sizeof(*ip); +#ifdef __FreeBSD__ + BPF_MTAP(ifp, m); +#else + bpf_mtap(ifp->if_bpf, m, BPF_DIRECTION_OUT); +#endif + m->m_data -= sizeof(*ip); + m->m_len = m->m_pkthdr.len = sc->sc_len; + } + + if (sc->sc_sync_if == NULL) { + sc->sc_len = PFSYNC_MINPKT; + m_freem(m); + return; + } +#endif + +#ifdef __FreeBSD__ + sc->sc_ifp->if_opackets++; + sc->sc_ifp->if_obytes += m->m_pkthdr.len; + sc->sc_len = PFSYNC_MINPKT; + + if (!_IF_QFULL(&sc->sc_ifp->if_snd)) + _IF_ENQUEUE(&sc->sc_ifp->if_snd, m); + else { + m_freem(m); + sc->sc_ifp->if_snd.ifq_drops++; + } + if (schedswi) + swi_sched(V_pfsync_swi_cookie, 0); +#else + sc->sc_if.if_opackets++; + sc->sc_if.if_obytes += m->m_pkthdr.len; + + if (ip_output(m, NULL, NULL, IP_RAWOUTPUT, &sc->sc_imo, NULL) == 0) + pfsyncstats.pfsyncs_opackets++; + else + pfsyncstats.pfsyncs_oerrors++; + + /* start again */ + sc->sc_len = PFSYNC_MINPKT; +#endif +} + +void +pfsync_insert_state(struct pf_state *st) +{ +#ifdef __FreeBSD__ + struct pfsync_softc *sc = V_pfsyncif; +#else + struct pfsync_softc *sc = pfsyncif; +#endif + +#ifdef __FreeBSD__ + PF_LOCK_ASSERT(); +#else + splassert(IPL_SOFTNET); +#endif + + if (ISSET(st->rule.ptr->rule_flag, PFRULE_NOSYNC) || + st->key[PF_SK_WIRE]->proto == IPPROTO_PFSYNC) { + SET(st->state_flags, PFSTATE_NOSYNC); + return; + } + + if (sc == NULL || ISSET(st->state_flags, PFSTATE_NOSYNC)) + return; + +#ifdef PFSYNC_DEBUG +#ifdef __FreeBSD__ + KASSERT(st->sync_state == PFSYNC_S_NONE, + ("%s: st->sync_state == PFSYNC_S_NONE", __FUNCTION__)); +#else + KASSERT(st->sync_state == PFSYNC_S_NONE); +#endif +#endif + + if (sc->sc_len == PFSYNC_MINPKT) +#ifdef __FreeBSD__ + callout_reset(&sc->sc_tmo, 1 * hz, pfsync_timeout, + V_pfsyncif); +#else + timeout_add_sec(&sc->sc_tmo, 1); +#endif + + pfsync_q_ins(st, PFSYNC_S_INS); + + st->sync_updates = 0; +} + +int defer = 10; + +int +pfsync_defer(struct pf_state *st, struct mbuf *m) +{ +#ifdef __FreeBSD__ + struct pfsync_softc *sc = V_pfsyncif; +#else + struct pfsync_softc *sc = pfsyncif; +#endif + struct pfsync_deferral *pd; + +#ifdef __FreeBSD__ + PF_LOCK_ASSERT(); +#else + splassert(IPL_SOFTNET); +#endif + + if (!sc->sc_defer || m->m_flags & (M_BCAST|M_MCAST)) + return (0); + + if (sc->sc_deferred >= 128) + pfsync_undefer(TAILQ_FIRST(&sc->sc_deferrals), 0); + + pd = pool_get(&sc->sc_pool, M_NOWAIT); + if (pd == NULL) + return (0); + sc->sc_deferred++; + +#ifdef __FreeBSD__ + m->m_flags |= M_SKIP_FIREWALL; +#else + m->m_pkthdr.pf.flags |= PF_TAG_GENERATED; +#endif + SET(st->state_flags, PFSTATE_ACK); + + pd->pd_st = st; + pd->pd_m = m; + + TAILQ_INSERT_TAIL(&sc->sc_deferrals, pd, pd_entry); +#ifdef __FreeBSD__ + callout_init(&pd->pd_tmo, CALLOUT_MPSAFE); + callout_reset(&pd->pd_tmo, defer, pfsync_defer_tmo, + pd); +#else + timeout_set(&pd->pd_tmo, pfsync_defer_tmo, pd); + timeout_add(&pd->pd_tmo, defer); +#endif + + swi_sched(V_pfsync_swi_cookie, 0); + + return (1); +} + +void +pfsync_undefer(struct pfsync_deferral *pd, int drop) +{ +#ifdef __FreeBSD__ + struct pfsync_softc *sc = V_pfsyncif; +#else + struct pfsync_softc *sc = pfsyncif; +#endif + int s; + +#ifdef __FreeBSD__ + PF_LOCK_ASSERT(); +#else + splassert(IPL_SOFTNET); +#endif + + TAILQ_REMOVE(&sc->sc_deferrals, pd, pd_entry); + sc->sc_deferred--; + + CLR(pd->pd_st->state_flags, PFSTATE_ACK); + timeout_del(&pd->pd_tmo); /* bah */ + if (drop) + m_freem(pd->pd_m); + else { + s = splnet(); +#ifdef __FreeBSD__ + /* XXX: use pf_defered?! */ + PF_UNLOCK(); +#endif + ip_output(pd->pd_m, (void *)NULL, (void *)NULL, 0, + (void *)NULL, (void *)NULL); +#ifdef __FreeBSD__ + PF_LOCK(); +#endif + splx(s); + } + + pool_put(&sc->sc_pool, pd); +} + +void +pfsync_defer_tmo(void *arg) +{ +#if defined(__FreeBSD__) && defined(VIMAGE) + struct pfsync_deferral *pd = arg; +#endif + int s; + + s = splsoftnet(); +#ifdef __FreeBSD__ + CURVNET_SET(pd->pd_m->m_pkthdr.rcvif->if_vnet); /* XXX */ + PF_LOCK(); +#endif + pfsync_undefer(arg, 0); +#ifdef __FreeBSD__ + PF_UNLOCK(); + CURVNET_RESTORE(); +#endif + splx(s); +} + +void +pfsync_deferred(struct pf_state *st, int drop) +{ +#ifdef __FreeBSD__ + struct pfsync_softc *sc = V_pfsyncif; +#else + struct pfsync_softc *sc = pfsyncif; +#endif + struct pfsync_deferral *pd; + + TAILQ_FOREACH(pd, &sc->sc_deferrals, pd_entry) { + if (pd->pd_st == st) { + pfsync_undefer(pd, drop); + return; + } + } + + panic("pfsync_send_deferred: unable to find deferred state"); +} + +u_int pfsync_upds = 0; + +void +pfsync_update_state(struct pf_state *st) +{ +#ifdef __FreeBSD__ + struct pfsync_softc *sc = V_pfsyncif; +#else + struct pfsync_softc *sc = pfsyncif; +#endif + int sync = 0; + +#ifdef __FreeBSD__ + PF_LOCK_ASSERT(); +#else + splassert(IPL_SOFTNET); +#endif + + if (sc == NULL) + return; + + if (ISSET(st->state_flags, PFSTATE_ACK)) + pfsync_deferred(st, 0); + if (ISSET(st->state_flags, PFSTATE_NOSYNC)) { + if (st->sync_state != PFSYNC_S_NONE) + pfsync_q_del(st); + return; + } + + if (sc->sc_len == PFSYNC_MINPKT) +#ifdef __FreeBSD__ + callout_reset(&sc->sc_tmo, 1 * hz, pfsync_timeout, + V_pfsyncif); +#else + timeout_add_sec(&sc->sc_tmo, 1); +#endif + + switch (st->sync_state) { + case PFSYNC_S_UPD_C: + case PFSYNC_S_UPD: + case PFSYNC_S_INS: + /* we're already handling it */ + + if (st->key[PF_SK_WIRE]->proto == IPPROTO_TCP) { + st->sync_updates++; + if (st->sync_updates >= sc->sc_maxupdates) + sync = 1; + } + break; + + case PFSYNC_S_IACK: + pfsync_q_del(st); + case PFSYNC_S_NONE: + pfsync_q_ins(st, PFSYNC_S_UPD_C); + st->sync_updates = 0; + break; + + default: + panic("pfsync_update_state: unexpected sync state %d", + st->sync_state); + } + + if (sync || (time_uptime - st->pfsync_time) < 2) { + pfsync_upds++; + schednetisr(NETISR_PFSYNC); + } +} + +void +pfsync_request_update(u_int32_t creatorid, u_int64_t id) +{ +#ifdef __FreeBSD__ + struct pfsync_softc *sc = V_pfsyncif; +#else + struct pfsync_softc *sc = pfsyncif; +#endif + struct pfsync_upd_req_item *item; + size_t nlen = sizeof(struct pfsync_upd_req); + int s; + + PF_LOCK_ASSERT(); + + /* + * this code does nothing to prevent multiple update requests for the + * same state being generated. + */ + + item = pool_get(&sc->sc_pool, PR_NOWAIT); + if (item == NULL) { + /* XXX stats */ + return; + } + + item->ur_msg.id = id; + item->ur_msg.creatorid = creatorid; + + if (TAILQ_EMPTY(&sc->sc_upd_req_list)) + nlen += sizeof(struct pfsync_subheader); + +#ifdef __FreeBSD__ + if (sc->sc_len + nlen > sc->sc_ifp->if_mtu) { +#else + if (sc->sc_len + nlen > sc->sc_if.if_mtu) { +#endif + s = splnet(); + pfsync_sendout(); + splx(s); + + nlen = sizeof(struct pfsync_subheader) + + sizeof(struct pfsync_upd_req); + } + + TAILQ_INSERT_TAIL(&sc->sc_upd_req_list, item, ur_entry); + sc->sc_len += nlen; + + schednetisr(NETISR_PFSYNC); +} + +void +pfsync_update_state_req(struct pf_state *st) +{ +#ifdef __FreeBSD__ + struct pfsync_softc *sc = V_pfsyncif; +#else + struct pfsync_softc *sc = pfsyncif; +#endif + + PF_LOCK_ASSERT(); + + if (sc == NULL) + panic("pfsync_update_state_req: nonexistant instance"); + + if (ISSET(st->state_flags, PFSTATE_NOSYNC)) { + if (st->sync_state != PFSYNC_S_NONE) + pfsync_q_del(st); + return; + } + + switch (st->sync_state) { + case PFSYNC_S_UPD_C: + case PFSYNC_S_IACK: + pfsync_q_del(st); + case PFSYNC_S_NONE: + pfsync_q_ins(st, PFSYNC_S_UPD); + schednetisr(NETISR_PFSYNC); + return; + + case PFSYNC_S_INS: + case PFSYNC_S_UPD: + case PFSYNC_S_DEL: + /* we're already handling it */ + return; + + default: + panic("pfsync_update_state_req: unexpected sync state %d", + st->sync_state); + } +} + +void +pfsync_delete_state(struct pf_state *st) +{ +#ifdef __FreeBSD__ + struct pfsync_softc *sc = V_pfsyncif; +#else + struct pfsync_softc *sc = pfsyncif; +#endif + +#ifdef __FreeBSD__ + PF_LOCK_ASSERT(); +#else + splassert(IPL_SOFTNET); +#endif + + if (sc == NULL) + return; + + if (ISSET(st->state_flags, PFSTATE_ACK)) + pfsync_deferred(st, 1); + if (ISSET(st->state_flags, PFSTATE_NOSYNC)) { + if (st->sync_state != PFSYNC_S_NONE) + pfsync_q_del(st); + return; + } + + if (sc->sc_len == PFSYNC_MINPKT) +#ifdef __FreeBSD__ + callout_reset(&sc->sc_tmo, 1 * hz, pfsync_timeout, + V_pfsyncif); +#else + timeout_add_sec(&sc->sc_tmo, 1); +#endif + + switch (st->sync_state) { + case PFSYNC_S_INS: + /* we never got to tell the world so just forget about it */ + pfsync_q_del(st); + return; + + case PFSYNC_S_UPD_C: + case PFSYNC_S_UPD: + case PFSYNC_S_IACK: + pfsync_q_del(st); + /* FALLTHROUGH to putting it on the del list */ + + case PFSYNC_S_NONE: + pfsync_q_ins(st, PFSYNC_S_DEL); + return; + + default: + panic("pfsync_delete_state: unexpected sync state %d", + st->sync_state); + } +} + +void +pfsync_clear_states(u_int32_t creatorid, const char *ifname) +{ + struct { + struct pfsync_subheader subh; + struct pfsync_clr clr; + } __packed r; + +#ifdef __FreeBSD__ + struct pfsync_softc *sc = V_pfsyncif; +#else + struct pfsync_softc *sc = pfsyncif; +#endif + +#ifdef __FreeBSD__ + PF_LOCK_ASSERT(); +#else + splassert(IPL_SOFTNET); +#endif + + if (sc == NULL) + return; + + bzero(&r, sizeof(r)); + + r.subh.action = PFSYNC_ACT_CLR; + r.subh.count = htons(1); + + strlcpy(r.clr.ifname, ifname, sizeof(r.clr.ifname)); + r.clr.creatorid = creatorid; + + pfsync_send_plus(&r, sizeof(r)); +} + +void +pfsync_q_ins(struct pf_state *st, int q) +{ +#ifdef __FreeBSD__ + struct pfsync_softc *sc = V_pfsyncif; +#else + struct pfsync_softc *sc = pfsyncif; +#endif + size_t nlen = pfsync_qs[q].len; + int s; + + PF_LOCK_ASSERT(); + +#ifdef __FreeBSD__ + KASSERT(st->sync_state == PFSYNC_S_NONE, + ("%s: st->sync_state == PFSYNC_S_NONE", __FUNCTION__)); +#else + KASSERT(st->sync_state == PFSYNC_S_NONE); +#endif + +#if 1 || defined(PFSYNC_DEBUG) + if (sc->sc_len < PFSYNC_MINPKT) +#ifdef __FreeBSD__ + panic("pfsync pkt len is too low %zu", sc->sc_len); +#else + panic("pfsync pkt len is too low %d", sc->sc_len); +#endif +#endif + if (TAILQ_EMPTY(&sc->sc_qs[q])) + nlen += sizeof(struct pfsync_subheader); + +#ifdef __FreeBSD__ + if (sc->sc_len + nlen > sc->sc_ifp->if_mtu) { +#else + if (sc->sc_len + nlen > sc->sc_if.if_mtu) { +#endif + s = splnet(); + pfsync_sendout(); + splx(s); + + nlen = sizeof(struct pfsync_subheader) + pfsync_qs[q].len; + } + + sc->sc_len += nlen; + TAILQ_INSERT_TAIL(&sc->sc_qs[q], st, sync_list); + st->sync_state = q; +} + +void +pfsync_q_del(struct pf_state *st) +{ +#ifdef __FreeBSD__ + struct pfsync_softc *sc = V_pfsyncif; +#else + struct pfsync_softc *sc = pfsyncif; +#endif + int q = st->sync_state; + +#ifdef __FreeBSD__ + KASSERT(st->sync_state != PFSYNC_S_NONE, + ("%s: st->sync_state != PFSYNC_S_NONE", __FUNCTION__)); +#else + KASSERT(st->sync_state != PFSYNC_S_NONE); +#endif + + sc->sc_len -= pfsync_qs[q].len; + TAILQ_REMOVE(&sc->sc_qs[q], st, sync_list); + st->sync_state = PFSYNC_S_NONE; + + if (TAILQ_EMPTY(&sc->sc_qs[q])) + sc->sc_len -= sizeof(struct pfsync_subheader); +} + +#ifdef notyet +void +pfsync_update_tdb(struct tdb *t, int output) +{ +#ifdef __FreeBSD__ + struct pfsync_softc *sc = V_pfsyncif; +#else + struct pfsync_softc *sc = pfsyncif; +#endif + size_t nlen = sizeof(struct pfsync_tdb); + int s; + + if (sc == NULL) + return; + + if (!ISSET(t->tdb_flags, TDBF_PFSYNC)) { + if (TAILQ_EMPTY(&sc->sc_tdb_q)) + nlen += sizeof(struct pfsync_subheader); + + if (sc->sc_len + nlen > sc->sc_if.if_mtu) { + s = splnet(); + PF_LOCK(); + pfsync_sendout(); + PF_UNLOCK(); + splx(s); + + nlen = sizeof(struct pfsync_subheader) + + sizeof(struct pfsync_tdb); + } + + sc->sc_len += nlen; + TAILQ_INSERT_TAIL(&sc->sc_tdb_q, t, tdb_sync_entry); + SET(t->tdb_flags, TDBF_PFSYNC); + t->tdb_updates = 0; + } else { + if (++t->tdb_updates >= sc->sc_maxupdates) + schednetisr(NETISR_PFSYNC); + } + + if (output) + SET(t->tdb_flags, TDBF_PFSYNC_RPL); + else + CLR(t->tdb_flags, TDBF_PFSYNC_RPL); +} + +void +pfsync_delete_tdb(struct tdb *t) +{ +#ifdef __FreeBSD__ + struct pfsync_softc *sc = V_pfsyncif; +#else + struct pfsync_softc *sc = pfsyncif; +#endif + + if (sc == NULL || !ISSET(t->tdb_flags, TDBF_PFSYNC)) + return; + + sc->sc_len -= sizeof(struct pfsync_tdb); + TAILQ_REMOVE(&sc->sc_tdb_q, t, tdb_sync_entry); + CLR(t->tdb_flags, TDBF_PFSYNC); + + if (TAILQ_EMPTY(&sc->sc_tdb_q)) + sc->sc_len -= sizeof(struct pfsync_subheader); +} + +int +pfsync_out_tdb(struct tdb *t, struct mbuf *m, int offset) +{ + struct pfsync_tdb *ut = (struct pfsync_tdb *)(m->m_data + offset); + + bzero(ut, sizeof(*ut)); + ut->spi = t->tdb_spi; + bcopy(&t->tdb_dst, &ut->dst, sizeof(ut->dst)); + /* + * When a failover happens, the master's rpl is probably above + * what we see here (we may be up to a second late), so + * increase it a bit for outbound tdbs to manage most such + * situations. + * + * For now, just add an offset that is likely to be larger + * than the number of packets we can see in one second. The RFC + * just says the next packet must have a higher seq value. + * + * XXX What is a good algorithm for this? We could use + * a rate-determined increase, but to know it, we would have + * to extend struct tdb. + * XXX pt->rpl can wrap over MAXINT, but if so the real tdb + * will soon be replaced anyway. For now, just don't handle + * this edge case. + */ +#define RPL_INCR 16384 + ut->rpl = htonl(t->tdb_rpl + (ISSET(t->tdb_flags, TDBF_PFSYNC_RPL) ? + RPL_INCR : 0)); + ut->cur_bytes = htobe64(t->tdb_cur_bytes); + ut->sproto = t->tdb_sproto; + + return (sizeof(*ut)); +} +#endif + +void +pfsync_bulk_start(void) +{ +#ifdef __FreeBSD__ + struct pfsync_softc *sc = V_pfsyncif; +#else + struct pfsync_softc *sc = pfsyncif; +#endif + +#ifdef __FreeBSD__ + if (V_pf_status.debug >= PF_DEBUG_MISC) +#else + if (pf_status.debug >= PF_DEBUG_MISC) +#endif + printf("pfsync: received bulk update request\n"); + +#ifdef __FreeBSD__ + PF_LOCK_ASSERT(); + if (TAILQ_EMPTY(&V_state_list)) +#else + if (TAILQ_EMPTY(&state_list)) +#endif + pfsync_bulk_status(PFSYNC_BUS_END); + else { + sc->sc_ureq_received = time_uptime; + if (sc->sc_bulk_next == NULL) +#ifdef __FreeBSD__ + sc->sc_bulk_next = TAILQ_FIRST(&V_state_list); +#else + sc->sc_bulk_next = TAILQ_FIRST(&state_list); +#endif + sc->sc_bulk_last = sc->sc_bulk_next; + + pfsync_bulk_status(PFSYNC_BUS_START); + callout_reset(&sc->sc_bulk_tmo, 1, pfsync_bulk_update, sc); + } +} + +void +pfsync_bulk_update(void *arg) +{ + struct pfsync_softc *sc = arg; + struct pf_state *st = sc->sc_bulk_next; + int i = 0; + int s; + + PF_LOCK_ASSERT(); + + s = splsoftnet(); +#ifdef __FreeBSD__ + CURVNET_SET(sc->sc_ifp->if_vnet); +#endif + for (;;) { + if (st->sync_state == PFSYNC_S_NONE && + st->timeout < PFTM_MAX && + st->pfsync_time <= sc->sc_ureq_received) { + pfsync_update_state_req(st); + i++; + } + + st = TAILQ_NEXT(st, entry_list); + if (st == NULL) +#ifdef __FreeBSD__ + st = TAILQ_FIRST(&V_state_list); +#else + st = TAILQ_FIRST(&state_list); +#endif + + if (st == sc->sc_bulk_last) { + /* we're done */ + sc->sc_bulk_next = NULL; + sc->sc_bulk_last = NULL; + pfsync_bulk_status(PFSYNC_BUS_END); + break; + } + +#ifdef __FreeBSD__ + if (i > 1 && (sc->sc_ifp->if_mtu - sc->sc_len) < +#else + if (i > 1 && (sc->sc_if.if_mtu - sc->sc_len) < +#endif + sizeof(struct pfsync_state)) { + /* we've filled a packet */ + sc->sc_bulk_next = st; +#ifdef __FreeBSD__ + callout_reset(&sc->sc_bulk_tmo, 1, + pfsync_bulk_update, sc); +#else + timeout_add(&sc->sc_bulk_tmo, 1); +#endif + break; + } + } + +#ifdef __FreeBSD__ + CURVNET_RESTORE(); +#endif + splx(s); +} + +void +pfsync_bulk_status(u_int8_t status) +{ + struct { + struct pfsync_subheader subh; + struct pfsync_bus bus; + } __packed r; + +#ifdef __FreeBSD__ + struct pfsync_softc *sc = V_pfsyncif; +#else + struct pfsync_softc *sc = pfsyncif; +#endif + + PF_LOCK_ASSERT(); + + bzero(&r, sizeof(r)); + + r.subh.action = PFSYNC_ACT_BUS; + r.subh.count = htons(1); + +#ifdef __FreeBSD__ + r.bus.creatorid = V_pf_status.hostid; +#else + r.bus.creatorid = pf_status.hostid; +#endif + r.bus.endtime = htonl(time_uptime - sc->sc_ureq_received); + r.bus.status = status; + + pfsync_send_plus(&r, sizeof(r)); +} + +void +pfsync_bulk_fail(void *arg) +{ + struct pfsync_softc *sc = arg; + +#ifdef __FreeBSD__ + CURVNET_SET(sc->sc_ifp->if_vnet); +#endif + + if (sc->sc_bulk_tries++ < PFSYNC_MAX_BULKTRIES) { + /* Try again */ +#ifdef __FreeBSD__ + callout_reset(&sc->sc_bulkfail_tmo, 5 * hz, + pfsync_bulk_fail, V_pfsyncif); +#else + timeout_add_sec(&sc->sc_bulkfail_tmo, 5); +#endif + PF_LOCK(); + pfsync_request_update(0, 0); + PF_UNLOCK(); + } else { + /* Pretend like the transfer was ok */ + sc->sc_ureq_sent = 0; + sc->sc_bulk_tries = 0; +#ifdef __FreeBSD__ + if (!sc->pfsync_sync_ok && carp_demote_adj_p) + (*carp_demote_adj_p)(-V_pfsync_carp_adj, + "pfsync bulk fail"); + sc->pfsync_sync_ok = 1; +#else +#if NCARP > 0 + if (!pfsync_sync_ok) + carp_group_demote_adj(&sc->sc_if, -1); +#endif + pfsync_sync_ok = 1; +#endif +#ifdef __FreeBSD__ + if (V_pf_status.debug >= PF_DEBUG_MISC) +#else + if (pf_status.debug >= PF_DEBUG_MISC) +#endif + printf("pfsync: failed to receive bulk update\n"); + } + +#ifdef __FreeBSD__ + CURVNET_RESTORE(); +#endif +} + +void +pfsync_send_plus(void *plus, size_t pluslen) +{ +#ifdef __FreeBSD__ + struct pfsync_softc *sc = V_pfsyncif; +#else + struct pfsync_softc *sc = pfsyncif; +#endif + int s; + + PF_LOCK_ASSERT(); + +#ifdef __FreeBSD__ + if (sc->sc_len + pluslen > sc->sc_ifp->if_mtu) { +#else + if (sc->sc_len + pluslen > sc->sc_if.if_mtu) { +#endif + s = splnet(); + pfsync_sendout(); + splx(s); + } + + sc->sc_plus = plus; + sc->sc_len += (sc->sc_pluslen = pluslen); + + s = splnet(); + pfsync_sendout(); + splx(s); +} + +int +pfsync_up(void) +{ +#ifdef __FreeBSD__ + struct pfsync_softc *sc = V_pfsyncif; +#else + struct pfsync_softc *sc = pfsyncif; +#endif + +#ifdef __FreeBSD__ + if (sc == NULL || !ISSET(sc->sc_ifp->if_flags, IFF_DRV_RUNNING)) +#else + if (sc == NULL || !ISSET(sc->sc_if.if_flags, IFF_RUNNING)) +#endif + return (0); + + return (1); +} + +int +pfsync_state_in_use(struct pf_state *st) +{ +#ifdef __FreeBSD__ + struct pfsync_softc *sc = V_pfsyncif; +#else + struct pfsync_softc *sc = pfsyncif; +#endif + + if (sc == NULL) + return (0); + + if (st->sync_state != PFSYNC_S_NONE || + st == sc->sc_bulk_next || + st == sc->sc_bulk_last) + return (1); + + return (0); +} + +u_int pfsync_ints; +u_int pfsync_tmos; + +void +pfsync_timeout(void *arg) +{ +#if defined(__FreeBSD__) && defined(VIMAGE) + struct pfsync_softc *sc = arg; +#endif + int s; + +#ifdef __FreeBSD__ + CURVNET_SET(sc->sc_ifp->if_vnet); +#endif + + pfsync_tmos++; + + s = splnet(); +#ifdef __FreeBSD__ + PF_LOCK(); +#endif + pfsync_sendout(); +#ifdef __FreeBSD__ + PF_UNLOCK(); +#endif + splx(s); + +#ifdef __FreeBSD__ + CURVNET_RESTORE(); +#endif +} + +/* this is a softnet/netisr handler */ +void +#ifdef __FreeBSD__ +pfsyncintr(void *arg) +{ + struct pfsync_softc *sc = arg; + struct mbuf *m, *n; + + CURVNET_SET(sc->sc_ifp->if_vnet); + pfsync_ints++; + + PF_LOCK(); + if (sc->sc_len > PFSYNC_MINPKT) + pfsync_sendout1(0); + _IF_DEQUEUE_ALL(&sc->sc_ifp->if_snd, m); + PF_UNLOCK(); + + for (; m != NULL; m = n) { + + n = m->m_nextpkt; + m->m_nextpkt = NULL; + if (ip_output(m, NULL, NULL, IP_RAWOUTPUT, &sc->sc_imo, NULL) + == 0) + V_pfsyncstats.pfsyncs_opackets++; + else + V_pfsyncstats.pfsyncs_oerrors++; + } + CURVNET_RESTORE(); +} +#else +pfsyncintr(void) +{ + int s; + + pfsync_ints++; + + s = splnet(); + pfsync_sendout(); + splx(s); +} +#endif + +int +pfsync_sysctl(int *name, u_int namelen, void *oldp, size_t *oldlenp, void *newp, + size_t newlen) +{ + +#ifdef notyet + /* All sysctl names at this level are terminal. */ + if (namelen != 1) + return (ENOTDIR); + + switch (name[0]) { + case PFSYNCCTL_STATS: + if (newp != NULL) + return (EPERM); + return (sysctl_struct(oldp, oldlenp, newp, newlen, + &V_pfsyncstats, sizeof(V_pfsyncstats))); + } +#endif + return (ENOPROTOOPT); +} + +#ifdef __FreeBSD__ +static int +pfsync_multicast_setup(struct pfsync_softc *sc) +{ + struct ip_moptions *imo = &sc->sc_imo; + int error; + + if (!(sc->sc_sync_if->if_flags & IFF_MULTICAST)) { + sc->sc_sync_if = NULL; + return (EADDRNOTAVAIL); + } + + imo->imo_membership = (struct in_multi **)malloc( + (sizeof(struct in_multi *) * IP_MIN_MEMBERSHIPS), M_PFSYNC, + M_WAITOK | M_ZERO); + imo->imo_max_memberships = IP_MIN_MEMBERSHIPS; + imo->imo_multicast_vif = -1; + + if ((error = in_joingroup(sc->sc_sync_if, &sc->sc_sync_peer, NULL, + &imo->imo_membership[0])) != 0) { + free(imo->imo_membership, M_PFSYNC); + return (error); + } + imo->imo_num_memberships++; + imo->imo_multicast_ifp = sc->sc_sync_if; + imo->imo_multicast_ttl = PFSYNC_DFLTTL; + imo->imo_multicast_loop = 0; + + return (0); +} + +static void +pfsync_multicast_cleanup(struct pfsync_softc *sc) +{ + struct ip_moptions *imo = &sc->sc_imo; + + in_leavegroup(imo->imo_membership[0], NULL); + free(imo->imo_membership, M_PFSYNC); + imo->imo_membership = NULL; + imo->imo_multicast_ifp = NULL; +} + +#ifdef INET +extern struct domain inetdomain; +static struct protosw in_pfsync_protosw = { + .pr_type = SOCK_RAW, + .pr_domain = &inetdomain, + .pr_protocol = IPPROTO_PFSYNC, + .pr_flags = PR_ATOMIC|PR_ADDR, + .pr_input = pfsync_input, + .pr_output = (pr_output_t *)rip_output, + .pr_ctloutput = rip_ctloutput, + .pr_usrreqs = &rip_usrreqs +}; +#endif + +static int +pfsync_init() +{ + VNET_ITERATOR_DECL(vnet_iter); + int error = 0; + + VNET_LIST_RLOCK(); + VNET_FOREACH(vnet_iter) { + CURVNET_SET(vnet_iter); + V_pfsync_cloner = pfsync_cloner; + V_pfsync_cloner_data = pfsync_cloner_data; + V_pfsync_cloner.ifc_data = &V_pfsync_cloner_data; + if_clone_attach(&V_pfsync_cloner); + error = swi_add(NULL, "pfsync", pfsyncintr, V_pfsyncif, + SWI_NET, INTR_MPSAFE, &V_pfsync_swi_cookie); + CURVNET_RESTORE(); + if (error) + goto fail_locked; + } + VNET_LIST_RUNLOCK(); +#ifdef INET + error = pf_proto_register(PF_INET, &in_pfsync_protosw); + if (error) + goto fail; + error = ipproto_register(IPPROTO_PFSYNC); + if (error) { + pf_proto_unregister(PF_INET, IPPROTO_PFSYNC, SOCK_RAW); + goto fail; + } +#endif + PF_LOCK(); + pfsync_state_import_ptr = pfsync_state_import; + pfsync_up_ptr = pfsync_up; + pfsync_insert_state_ptr = pfsync_insert_state; + pfsync_update_state_ptr = pfsync_update_state; + pfsync_delete_state_ptr = pfsync_delete_state; + pfsync_clear_states_ptr = pfsync_clear_states; + pfsync_state_in_use_ptr = pfsync_state_in_use; + pfsync_defer_ptr = pfsync_defer; + PF_UNLOCK(); + + return (0); + +fail: + VNET_LIST_RLOCK(); +fail_locked: + VNET_FOREACH(vnet_iter) { + CURVNET_SET(vnet_iter); + if (V_pfsync_swi_cookie) { + swi_remove(V_pfsync_swi_cookie); + if_clone_detach(&V_pfsync_cloner); + } + CURVNET_RESTORE(); + } + VNET_LIST_RUNLOCK(); + + return (error); +} + +static void +pfsync_uninit() +{ + VNET_ITERATOR_DECL(vnet_iter); + + PF_LOCK(); + pfsync_state_import_ptr = NULL; + pfsync_up_ptr = NULL; + pfsync_insert_state_ptr = NULL; + pfsync_update_state_ptr = NULL; + pfsync_delete_state_ptr = NULL; + pfsync_clear_states_ptr = NULL; + pfsync_state_in_use_ptr = NULL; + pfsync_defer_ptr = NULL; + PF_UNLOCK(); + + ipproto_unregister(IPPROTO_PFSYNC); + pf_proto_unregister(PF_INET, IPPROTO_PFSYNC, SOCK_RAW); + VNET_LIST_RLOCK(); + VNET_FOREACH(vnet_iter) { + CURVNET_SET(vnet_iter); + swi_remove(V_pfsync_swi_cookie); + if_clone_detach(&V_pfsync_cloner); + CURVNET_RESTORE(); + } + VNET_LIST_RUNLOCK(); +} + +static int +pfsync_modevent(module_t mod, int type, void *data) +{ + int error = 0; + + switch (type) { + case MOD_LOAD: + error = pfsync_init(); + break; + case MOD_QUIESCE: + /* + * Module should not be unloaded due to race conditions. + */ + error = EPERM; + break; + case MOD_UNLOAD: + pfsync_uninit(); + break; + default: + error = EINVAL; + break; + } + + return (error); +} + +static moduledata_t pfsync_mod = { + "pfsync", + pfsync_modevent, + 0 +}; + +#define PFSYNC_MODVER 1 + +DECLARE_MODULE(pfsync, pfsync_mod, SI_SUB_PROTO_DOMAIN, SI_ORDER_ANY); +MODULE_VERSION(pfsync, PFSYNC_MODVER); +MODULE_DEPEND(pfsync, pf, PF_MODVER, PF_MODVER, PF_MODVER); +#endif /* __FreeBSD__ */ |