sys/net/pf/if_pfsync.c

   1 /*      $OpenBSD: if_pfsync.c,v 1.98 2008/06/29 08:42:15 mcbride Exp $  */
   2
   3 /*
   4  * Copyright (c) 2002 Michael Shalayeff
   5  * All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in the
  14  *    documentation and/or other materials provided with the distribution.
  15  *
  16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  17  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  18  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  19  * IN NO EVENT SHALL THE AUTHOR OR HIS RELATIVES BE LIABLE FOR ANY DIRECT,
  20  * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
  21  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
  22  * SERVICES; LOSS OF MIND, USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  23  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  24  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
  25  * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
  26  * THE POSSIBILITY OF SUCH DAMAGE.
  27  */
  28
  29 #include "opt_inet.h"
  30 #include "opt_inet6.h"
  31 #include "opt_carp.h"
  32
  33 #include <sys/param.h>
  34 #include <sys/endian.h>
  35 #include <sys/proc.h>
  36 #include <sys/priv.h>
  37 #include <sys/systm.h>
  38 #include <sys/time.h>
  39 #include <sys/mbuf.h>
  40 #include <sys/socket.h>
  41 #include <sys/kernel.h>
  42 #include <sys/malloc.h>
  43 #include <sys/module.h>
  44 #include <sys/sockio.h>
  45 #include <sys/thread2.h>
  46
  47 #include <machine/inttypes.h>
  48
  49 #include <net/if.h>
  50 #include <net/if_types.h>
  51 #include <net/route.h>
  52 #include <net/bpf.h>
  53 #include <netinet/in.h>
  54 #include <netinet/if_ether.h>
  55 #include <netinet/ip_carp.h>
  56 #include <netinet/tcp.h>
  57 #include <netinet/tcp_seq.h>
  58
  59 #ifdef  INET
  60 #include <netinet/in_systm.h>
  61 #include <netinet/in_var.h>
  62 #include <netinet/ip.h>
  63 #include <netinet/ip_var.h>
  64 #endif
  65
  66 #ifdef INET6
  67 #include <netinet6/nd6.h>
  68 #endif /* INET6 */
  69
  70 #include <net/pf/pfvar.h>
  71 #include <net/pf/if_pfsync.h>
  72
  73 #define PFSYNCNAME      "pfsync"
  74
  75 #define PFSYNC_MINMTU   \
  76     (sizeof(struct pfsync_header) + sizeof(struct pf_state))
  77
  78 #ifdef PFSYNCDEBUG
  79 #define DPRINTF(x)    do { if (pfsyncdebug) kprintf x ; } while (0)
  80 int pfsyncdebug;
  81 #else
  82 #define DPRINTF(x)
  83 #endif
  84
  85 struct pfsync_softc     *pfsyncif = NULL;
  86 struct pfsyncstats       pfsyncstats;
  87
  88 void    pfsyncattach(int);
  89 static int      pfsync_clone_destroy(struct ifnet *);
  90 static int      pfsync_clone_create(struct if_clone *, int, caddr_t);
  91 void    pfsync_setmtu(struct pfsync_softc *, int);
  92 int     pfsync_alloc_scrub_memory(struct pfsync_state_peer *,
  93             struct pf_state_peer *);
  94 int     pfsyncoutput(struct ifnet *, struct mbuf *, struct sockaddr *,
  95             struct rtentry *);
  96 int     pfsyncioctl(struct ifnet *, u_long, caddr_t, struct ucred *);
  97 void    pfsyncstart(struct ifnet *);
  98
  99 struct mbuf *pfsync_get_mbuf(struct pfsync_softc *, u_int8_t, void **);
 100 int     pfsync_request_update(struct pfsync_state_upd *, struct in_addr *);
 101 int     pfsync_sendout(struct pfsync_softc *);
 102 int     pfsync_sendout_mbuf(struct pfsync_softc *, struct mbuf *);
 103 void    pfsync_timeout(void *);
 104 void    pfsync_send_bus(struct pfsync_softc *, u_int8_t);
 105 void    pfsync_bulk_update(void *);
 106 void    pfsync_bulkfail(void *);
 107
 108 static MALLOC_DEFINE(M_PFSYNC, PFSYNCNAME, "Packet Filter State Sync. Interface");
 109 static LIST_HEAD(pfsync_list, pfsync_softc) pfsync_list;
 110
 111 int     pfsync_sync_ok;
 112
 113 struct if_clone pfsync_cloner =
 114     IF_CLONE_INITIALIZER("pfsync", pfsync_clone_create, pfsync_clone_destroy, 1 ,1);
 115
 116 void
 117 pfsyncattach(int npfsync)
 118 {
 119         if_clone_attach(&pfsync_cloner);
 120 }
 121 static int
 122 pfsync_clone_create(struct if_clone *ifc, int unit, caddr_t param __unused)
 123 {
 124         struct pfsync_softc *sc;
 125         struct ifnet *ifp;
 126
 127         lwkt_gettoken(&pf_token);
 128
 129         MALLOC(sc, struct pfsync_softc *, sizeof(*sc), M_PFSYNC,
 130             M_WAITOK|M_ZERO);
 131         pfsync_sync_ok = 1;
 132         sc->sc_mbuf = NULL;
 133         sc->sc_mbuf_net = NULL;
 134         sc->sc_mbuf_tdb = NULL;
 135         sc->sc_statep.s = NULL;
 136         sc->sc_statep_net.s = NULL;
 137         sc->sc_statep_tdb.t = NULL;
 138         sc->sc_maxupdates = 128;
 139         sc->sc_sync_peer.s_addr =htonl(INADDR_PFSYNC_GROUP);
 140         sc->sc_sendaddr.s_addr = htonl(INADDR_PFSYNC_GROUP);
 141         sc->sc_ureq_received = 0;
 142         sc->sc_ureq_sent = 0;
 143         sc->sc_bulk_send_next = NULL;
 144         sc->sc_bulk_terminator = NULL;
 145         sc->sc_imo.imo_max_memberships = IP_MAX_MEMBERSHIPS;
 146         lwkt_reltoken(&pf_token);
 147         ifp = &sc->sc_if;
 148         ksnprintf(ifp->if_xname, sizeof ifp->if_xname, "pfsync%d", unit);
 149         if_initname(ifp, ifc->ifc_name, unit);
 150         ifp->if_ioctl = pfsyncioctl;
 151         ifp->if_output = pfsyncoutput;
 152         ifp->if_start = pfsyncstart;
 153         ifp->if_type = IFT_PFSYNC;
 154         ifp->if_snd.ifq_maxlen = ifqmaxlen;
 155         ifp->if_hdrlen = PFSYNC_HDRLEN;
 156         ifp->if_baudrate = IF_Mbps(100);
 157         ifp->if_softc = sc;
 158         pfsync_setmtu(sc, MCLBYTES);
 159         callout_init(&sc->sc_tmo);
 160         /* callout_init(&sc->sc_tdb_tmo); XXX we don't support tdb (yet) */
 161         callout_init(&sc->sc_bulk_tmo);
 162         callout_init(&sc->sc_bulkfail_tmo);
 163         if_attach(ifp, NULL);
 164
 165         LIST_INSERT_HEAD(&pfsync_list, sc, sc_next);
 166
 167
 168 #if NCARP > 0
 169         if_addgroup(ifp, "carp");
 170 #endif
 171
 172 #if NBPFILTER > 0
 173         bpfattach(&sc->sc_if, DLT_PFSYNC, PFSYNC_HDRLEN);
 174 #endif
 175         lwkt_gettoken(&pf_token);
 176
 177         lwkt_reltoken(&pf_token);
 178         return (0);
 179 }
 180
 181 static int
 182 pfsync_clone_destroy(struct ifnet *ifp)
 183 {
 184         lwkt_gettoken(&pf_token);
 185         lwkt_reltoken(&pf_token);
 186
 187         struct pfsync_softc *sc = ifp->if_softc;
 188         callout_stop(&sc->sc_tmo);
 189         /* callout_stop(&sc->sc_tdb_tmo); XXX we don't support tdb (yet) */
 190         callout_stop(&sc->sc_bulk_tmo);
 191         callout_stop(&sc->sc_bulkfail_tmo);
 192 #if NCARP > 0
 193         if (!pfsync_sync_ok)
 194                 carp_group_demote_adj(&sc->sc_if, -1);
 195 #endif
 196 #if NBPFILTER > 0
 197         bpfdetach(ifp);
 198 #endif
 199         if_detach(ifp);
 200         lwkt_gettoken(&pf_token);
 201         LIST_REMOVE(sc, sc_next);
 202         kfree(sc, M_PFSYNC);
 203         lwkt_reltoken(&pf_token);
 204
 205
 206         return 0;
 207 }
 208
 209 /*
 210  * Start output on the pfsync interface.
 211  */
 212 void
 213 pfsyncstart(struct ifnet *ifp)
 214 {
 215         crit_enter();
 216         IF_DROP(&ifp->if_snd);
 217         IF_DRAIN(&ifp->if_snd);
 218         crit_exit();
 219 }
 220
 221 int
 222 pfsync_alloc_scrub_memory(struct pfsync_state_peer *s,
 223     struct pf_state_peer *d)
 224 {
 225         if (s->scrub.scrub_flag && d->scrub == NULL) {
 226                 d->scrub = kmalloc(sizeof(struct pf_state_scrub), M_PFSYNC, M_NOWAIT|M_ZERO);
 227
 228                 if (d->scrub == NULL)
 229                         return (ENOMEM);
 230         }
 231
 232         return (0);
 233 }
 234
 235 void
 236 pfsync_state_export(struct pfsync_state *sp, struct pf_state *st)
 237 {
 238         bzero(sp, sizeof(struct pfsync_state));
 239
 240         /* copy from state key */
 241         sp->key[PF_SK_WIRE].addr[0] = st->key[PF_SK_WIRE]->addr[0];
 242         sp->key[PF_SK_WIRE].addr[1] = st->key[PF_SK_WIRE]->addr[1];
 243         sp->key[PF_SK_WIRE].port[0] = st->key[PF_SK_WIRE]->port[0];
 244         sp->key[PF_SK_WIRE].port[1] = st->key[PF_SK_WIRE]->port[1];
 245         sp->key[PF_SK_STACK].addr[0] = st->key[PF_SK_STACK]->addr[0];
 246         sp->key[PF_SK_STACK].addr[1] = st->key[PF_SK_STACK]->addr[1];
 247         sp->key[PF_SK_STACK].port[0] = st->key[PF_SK_STACK]->port[0];
 248         sp->key[PF_SK_STACK].port[1] = st->key[PF_SK_STACK]->port[1];
 249         sp->proto = st->key[PF_SK_WIRE]->proto;
 250         sp->af = st->key[PF_SK_WIRE]->af;
 251
 252         /* copy from state */
 253         strlcpy(sp->ifname, st->kif->pfik_name, sizeof(sp->ifname));
 254         bcopy(&st->rt_addr, &sp->rt_addr, sizeof(sp->rt_addr));
 255         sp->creation = htonl(time_second - st->creation);
 256         sp->expire = pf_state_expires(st);
 257         if (sp->expire <= time_second)
 258                 sp->expire = htonl(0);
 259         else
 260                 sp->expire = htonl(sp->expire - time_second);
 261
 262         sp->direction = st->direction;
 263         sp->log = st->log;
 264         sp->timeout = st->timeout;
 265         sp->state_flags = st->state_flags;
 266         if (st->src_node)
 267                 sp->sync_flags |= PFSYNC_FLAG_SRCNODE;
 268         if (st->nat_src_node)
 269                 sp->sync_flags |= PFSYNC_FLAG_NATSRCNODE;
 270
 271         bcopy(&st->id, &sp->id, sizeof(sp->id));
 272         sp->creatorid = st->creatorid;
 273         pf_state_peer_hton(&st->src, &sp->src);
 274         pf_state_peer_hton(&st->dst, &sp->dst);
 275
 276         if (st->rule.ptr == NULL)
 277                 sp->rule = htonl(-1);
 278         else
 279                 sp->rule = htonl(st->rule.ptr->nr);
 280         if (st->anchor.ptr == NULL)
 281                 sp->anchor = htonl(-1);
 282         else
 283                 sp->anchor = htonl(st->anchor.ptr->nr);
 284         if (st->nat_rule.ptr == NULL)
 285                 sp->nat_rule = htonl(-1);
 286         else
 287                 sp->nat_rule = htonl(st->nat_rule.ptr->nr);
 288
 289         pf_state_counter_hton(st->packets[0], sp->packets[0]);
 290         pf_state_counter_hton(st->packets[1], sp->packets[1]);
 291         pf_state_counter_hton(st->bytes[0], sp->bytes[0]);
 292         pf_state_counter_hton(st->bytes[1], sp->bytes[1]);
 293
 294 }
 295
 296 int
 297 pfsync_state_import(struct pfsync_state *sp, u_int8_t flags)
 298 {
 299         struct pf_state *st = NULL;
 300         struct pf_state_key *skw = NULL, *sks = NULL;
 301         struct pf_rule *r = NULL;
 302         struct pfi_kif  *kif;
 303         int pool_flags;
 304         int error;
 305
 306         if (sp->creatorid == 0 && pf_status.debug >= PF_DEBUG_MISC) {
 307                 kprintf("pfsync_insert_net_state: invalid creator id:"
 308                     " %08x\n", ntohl(sp->creatorid));
 309                 return (EINVAL);
 310         }
 311
 312         if ((kif = pfi_kif_get(sp->ifname)) == NULL) {
 313                 if (pf_status.debug >= PF_DEBUG_MISC)
 314                         kprintf("pfsync_insert_net_state: "
 315                             "unknown interface: %s\n", sp->ifname);
 316                 if (flags & PFSYNC_SI_IOCTL)
 317                         return (EINVAL);
 318                 return (0);     /* skip this state */
 319         }
 320
 321         /*
 322          * If the ruleset checksums match or the state is coming from the ioctl,
 323          * it's safe to associate the state with the rule of that number.
 324          */
 325         if (sp->rule != htonl(-1) && sp->anchor == htonl(-1) &&
 326             (flags & (PFSYNC_SI_IOCTL | PFSYNC_SI_CKSUM)) && ntohl(sp->rule) <
 327             pf_main_ruleset.rules[PF_RULESET_FILTER].active.rcount)
 328                 r = pf_main_ruleset.rules[
 329                     PF_RULESET_FILTER].active.ptr_array[ntohl(sp->rule)];
 330         else
 331                 r = &pf_default_rule;
 332
 333         if ((r->max_states && r->states_cur >= r->max_states))
 334                 goto cleanup;
 335
 336         if (flags & PFSYNC_SI_IOCTL)
 337                 pool_flags = M_WAITOK | M_NULLOK | M_ZERO;
 338         else
 339                 pool_flags = M_WAITOK | M_ZERO;
 340
 341         if ((st = kmalloc(sizeof(struct pf_state), M_PFSYNC, pool_flags)) == NULL)
 342                 goto cleanup;
 343
 344         if ((skw = pf_alloc_state_key(pool_flags)) == NULL)
 345                 goto cleanup;
 346
 347         if (PF_ANEQ(&sp->key[PF_SK_WIRE].addr[0],
 348             &sp->key[PF_SK_STACK].addr[0], sp->af) ||
 349             PF_ANEQ(&sp->key[PF_SK_WIRE].addr[1],
 350             &sp->key[PF_SK_STACK].addr[1], sp->af) ||
 351             sp->key[PF_SK_WIRE].port[0] != sp->key[PF_SK_STACK].port[0] ||
 352             sp->key[PF_SK_WIRE].port[1] != sp->key[PF_SK_STACK].port[1]) {
 353                 if ((sks = pf_alloc_state_key(pool_flags)) == NULL)
 354                         goto cleanup;
 355         } else
 356                 sks = skw;
 357
 358         /* allocate memory for scrub info */
 359         if (pfsync_alloc_scrub_memory(&sp->src, &st->src) ||
 360             pfsync_alloc_scrub_memory(&sp->dst, &st->dst))
 361                 goto cleanup;
 362
 363         /* copy to state key(s) */
 364         skw->addr[0] = sp->key[PF_SK_WIRE].addr[0];
 365         skw->addr[1] = sp->key[PF_SK_WIRE].addr[1];
 366         skw->port[0] = sp->key[PF_SK_WIRE].port[0];
 367         skw->port[1] = sp->key[PF_SK_WIRE].port[1];
 368         skw->proto = sp->proto;
 369         skw->af = sp->af;
 370         if (sks != skw) {
 371                 sks->addr[0] = sp->key[PF_SK_STACK].addr[0];
 372                 sks->addr[1] = sp->key[PF_SK_STACK].addr[1];
 373                 sks->port[0] = sp->key[PF_SK_STACK].port[0];
 374                 sks->port[1] = sp->key[PF_SK_STACK].port[1];
 375                 sks->proto = sp->proto;
 376                 sks->af = sp->af;
 377         }
 378
 379         /* copy to state */
 380         bcopy(&sp->rt_addr, &st->rt_addr, sizeof(st->rt_addr));
 381         st->creation = time_second - ntohl(sp->creation);
 382         st->expire = time_second;
 383         if (sp->expire) {
 384                 /* XXX No adaptive scaling. */
 385                 st->expire -= r->timeout[sp->timeout] - ntohl(sp->expire);
 386         }
 387
 388         st->expire = ntohl(sp->expire) + time_second;
 389         st->direction = sp->direction;
 390         st->log = sp->log;
 391         st->timeout = sp->timeout;
 392         st->state_flags = sp->state_flags;
 393         if (!(flags & PFSYNC_SI_IOCTL))
 394                 st->sync_flags = PFSTATE_FROMSYNC;
 395
 396         bcopy(sp->id, &st->id, sizeof(st->id));
 397         st->creatorid = sp->creatorid;
 398         pf_state_peer_ntoh(&sp->src, &st->src);
 399         pf_state_peer_ntoh(&sp->dst, &st->dst);
 400
 401         st->rule.ptr = r;
 402         st->nat_rule.ptr = NULL;
 403         st->anchor.ptr = NULL;
 404         st->rt_kif = NULL;
 405
 406         st->pfsync_time = 0;
 407
 408
 409         /* XXX when we have nat_rule/anchors, use STATE_INC_COUNTERS */
 410         r->states_cur++;
 411         r->states_tot++;
 412
 413         if ((error = pf_state_insert(kif, skw, sks, st)) != 0) {
 414                 /* XXX when we have nat_rule/anchors, use STATE_DEC_COUNTERS */
 415                 r->states_cur--;
 416                 goto cleanup_state;
 417         }
 418
 419         return (0);
 420
 421  cleanup:
 422         error = ENOMEM;
 423         if (skw == sks)
 424                 sks = NULL;
 425         if (skw != NULL)
 426                 kfree(skw, M_PFSYNC);
 427         if (sks != NULL)
 428                 kfree(sks, M_PFSYNC);
 429
 430  cleanup_state: /* pf_state_insert frees the state keys */
 431         if (st) {
 432                 if (st->dst.scrub)
 433                         kfree(st->dst.scrub, M_PFSYNC);
 434                 if (st->src.scrub)
 435                         kfree(st->src.scrub, M_PFSYNC);
 436                 kfree(st, M_PFSYNC);
 437         }
 438         return (error);
 439 }
 440
 441 void
 442 pfsync_input(struct mbuf *m, ...)
 443 {
 444         struct ip *ip = mtod(m, struct ip *);
 445         struct pfsync_header *ph;
 446         struct pfsync_softc *sc = pfsyncif;
 447         struct pf_state *st;
 448         struct pf_state_key *sk;
 449         struct pf_state_item *si;
 450         struct pf_state_cmp id_key;
 451         struct pfsync_state *sp;
 452         struct pfsync_state_upd *up;
 453         struct pfsync_state_del *dp;
 454         struct pfsync_state_clr *cp;
 455         struct pfsync_state_upd_req *rup;
 456         struct pfsync_state_bus *bus;
 457 #ifdef IPSEC
 458         struct pfsync_tdb *pt;
 459 #endif
 460         struct in_addr src;
 461         struct mbuf *mp;
 462         int iplen, action, error, i, count, offp, sfail, stale = 0;
 463         u_int8_t flags = 0;
 464
 465         /* This function is not yet called from anywhere */
 466         /* Still we assume for safety that pf_token must be held */
 467         ASSERT_LWKT_TOKEN_HELD(&pf_token);
 468
 469         pfsyncstats.pfsyncs_ipackets++;
 470
 471         /* verify that we have a sync interface configured */
 472         if (!sc || !sc->sc_sync_ifp || !pf_status.running)
 473                 goto done;
 474
 475         /* verify that the packet came in on the right interface */
 476         if (sc->sc_sync_ifp != m->m_pkthdr.rcvif) {
 477                 pfsyncstats.pfsyncs_badif++;
 478                 goto done;
 479         }
 480
 481         /* verify that the IP TTL is 255.  */
 482         if (ip->ip_ttl != PFSYNC_DFLTTL) {
 483                 pfsyncstats.pfsyncs_badttl++;
 484                 goto done;
 485         }
 486
 487         iplen = ip->ip_hl << 2;
 488
 489         if (m->m_pkthdr.len < iplen + sizeof(*ph)) {
 490                 pfsyncstats.pfsyncs_hdrops++;
 491                 goto done;
 492         }
 493
 494         if (iplen + sizeof(*ph) > m->m_len) {
 495                 if ((m = m_pullup(m, iplen + sizeof(*ph))) == NULL) {
 496                         pfsyncstats.pfsyncs_hdrops++;
 497                         goto done;
 498                 }
 499                 ip = mtod(m, struct ip *);
 500         }
 501         ph = (struct pfsync_header *)((char *)ip + iplen);
 502
 503         /* verify the version */
 504         if (ph->version != PFSYNC_VERSION) {
 505                 pfsyncstats.pfsyncs_badver++;
 506                 goto done;
 507         }
 508
 509         action = ph->action;
 510         count = ph->count;
 511
 512         /* make sure it's a valid action code */
 513         if (action >= PFSYNC_ACT_MAX) {
 514                 pfsyncstats.pfsyncs_badact++;
 515                 goto done;
 516         }
 517
 518         /* Cheaper to grab this now than having to mess with mbufs later */
 519         src = ip->ip_src;
 520
 521         if (!bcmp(&ph->pf_chksum, &pf_status.pf_chksum, PF_MD5_DIGEST_LENGTH))
 522                 flags |= PFSYNC_SI_CKSUM;
 523
 524         switch (action) {
 525         case PFSYNC_ACT_CLR: {
 526                 struct pf_state *nexts;
 527                 struct pf_state_key *nextsk;
 528                 struct pfi_kif *kif;
 529                 u_int32_t creatorid;
 530                 if ((mp = m_pulldown(m, iplen + sizeof(*ph),
 531                     sizeof(*cp), &offp)) == NULL) {
 532                         pfsyncstats.pfsyncs_badlen++;
 533                         return;
 534                 }
 535                 cp = (struct pfsync_state_clr *)(mp->m_data + offp);
 536                 creatorid = cp->creatorid;
 537
 538                 crit_enter();
 539                 if (cp->ifname[0] == '\0') {
 540                         for (st = RB_MIN(pf_state_tree_id, &tree_id);
 541                             st; st = nexts) {
 542                                 nexts = RB_NEXT(pf_state_tree_id, &tree_id, st);
 543                                 if (st->creatorid == creatorid) {
 544                                         st->sync_flags |= PFSTATE_FROMSYNC;
 545                                         pf_unlink_state(st);
 546                                 }
 547                         }
 548                 } else {
 549                         if ((kif = pfi_kif_get(cp->ifname)) == NULL) {
 550                                 crit_exit();
 551                                 return;
 552                         }
 553                         /* XXX correct? */
 554                         for (sk = RB_MIN(pf_state_tree,
 555                             &pf_statetbl); sk; sk = nextsk) {
 556                                 nextsk = RB_NEXT(pf_state_tree,
 557                                     &pf_statetbl, sk);
 558                                 TAILQ_FOREACH(si, &sk->states, entry) {
 559                                         if (si->s->creatorid == creatorid) {
 560                                                 si->s->sync_flags |=
 561                                                     PFSTATE_FROMSYNC;
 562                                                 pf_unlink_state(si->s);
 563                                         }
 564                                 }
 565                         }
 566                 }
 567                 crit_exit();
 568
 569                 break;
 570         }
 571         case PFSYNC_ACT_INS:
 572                 if ((mp = m_pulldown(m, iplen + sizeof(*ph),
 573                     count * sizeof(*sp), &offp)) == NULL) {
 574                         pfsyncstats.pfsyncs_badlen++;
 575                         return;
 576                 }
 577
 578                 crit_enter();
 579                 for (i = 0, sp = (struct pfsync_state *)(mp->m_data + offp);
 580                     i < count; i++, sp++) {
 581                         /* check for invalid values */
 582                         if (sp->timeout >= PFTM_MAX ||
 583                             sp->src.state > PF_TCPS_PROXY_DST ||
 584                             sp->dst.state > PF_TCPS_PROXY_DST ||
 585                             sp->direction > PF_OUT ||
 586                             (sp->af != AF_INET && sp->af != AF_INET6)) {
 587                                 if (pf_status.debug >= PF_DEBUG_MISC)
 588                                         kprintf("pfsync_insert: PFSYNC_ACT_INS: "
 589                                             "invalid value\n");
 590                                 pfsyncstats.pfsyncs_badval++;
 591                                 continue;
 592                         }
 593
 594                         if ((error = pfsync_state_import(sp, flags))) {
 595                                 if (error == ENOMEM) {
 596                                         crit_exit();
 597                                         goto done;
 598                                 }
 599                                 continue;
 600                         }
 601                 }
 602                 crit_exit();
 603                 break;
 604         case PFSYNC_ACT_UPD:
 605                 if ((mp = m_pulldown(m, iplen + sizeof(*ph),
 606                     count * sizeof(*sp), &offp)) == NULL) {
 607                         pfsyncstats.pfsyncs_badlen++;
 608                         return;
 609                 }
 610
 611                 crit_enter();
 612                 for (i = 0, sp = (struct pfsync_state *)(mp->m_data + offp);
 613                     i < count; i++, sp++) {
 614                         int flags = PFSYNC_FLAG_STALE;
 615
 616                         /* check for invalid values */
 617                         if (sp->timeout >= PFTM_MAX ||
 618                             sp->src.state > PF_TCPS_PROXY_DST ||
 619                             sp->dst.state > PF_TCPS_PROXY_DST) {
 620                                 if (pf_status.debug >= PF_DEBUG_MISC)
 621                                         kprintf("pfsync_insert: PFSYNC_ACT_UPD: "
 622                                             "invalid value\n");
 623                                 pfsyncstats.pfsyncs_badval++;
 624                                 continue;
 625                         }
 626
 627                         bcopy(sp->id, &id_key.id, sizeof(id_key.id));
 628                         id_key.creatorid = sp->creatorid;
 629
 630                         st = pf_find_state_byid(&id_key);
 631                         if (st == NULL) {
 632                                 /* insert the update */
 633                                 if (pfsync_state_import(sp, flags))
 634                                         pfsyncstats.pfsyncs_badstate++;
 635                                 continue;
 636                         }
 637                         sk = st->key[PF_SK_WIRE];       /* XXX right one? */
 638                         sfail = 0;
 639                         if (sk->proto == IPPROTO_TCP) {
 640                                 /*
 641                                  * The state should never go backwards except
 642                                  * for syn-proxy states.  Neither should the
 643                                  * sequence window slide backwards.
 644                                  */
 645                                 if (st->src.state > sp->src.state &&
 646                                     (st->src.state < PF_TCPS_PROXY_SRC ||
 647                                     sp->src.state >= PF_TCPS_PROXY_SRC))
 648                                         sfail = 1;
 649                                 else if (SEQ_GT(st->src.seqlo,
 650                                     ntohl(sp->src.seqlo)))
 651                                         sfail = 3;
 652                                 else if (st->dst.state > sp->dst.state) {
 653                                         /* There might still be useful
 654                                          * information about the src state here,
 655                                          * so import that part of the update,
 656                                          * then "fail" so we send the updated
 657                                          * state back to the peer who is missing
 658                                          * our what we know. */
 659                                         pf_state_peer_ntoh(&sp->src, &st->src);
 660                                         /* XXX do anything with timeouts? */
 661                                         sfail = 7;
 662                                         flags = 0;
 663                                 } else if (st->dst.state >= TCPS_SYN_SENT &&
 664                                     SEQ_GT(st->dst.seqlo, ntohl(sp->dst.seqlo)))
 665                                         sfail = 4;
 666                         } else {
 667                                 /*
 668                                  * Non-TCP protocol state machine always go
 669                                  * forwards
 670                                  */
 671                                 if (st->src.state > sp->src.state)
 672                                         sfail = 5;
 673                                 else if (st->dst.state > sp->dst.state)
 674                                         sfail = 6;
 675                         }
 676                         if (sfail) {
 677                                 if (pf_status.debug >= PF_DEBUG_MISC)
 678                                         kprintf("pfsync: %s stale update "
 679                                             "(%d) id: %016jx "
 680                                             "creatorid: %08x\n",
 681                                             (sfail < 7 ?  "ignoring"
 682                                              : "partial"), sfail,
 683                                             (uintmax_t)be64toh(st->id),
 684                                             ntohl(st->creatorid));
 685                                 pfsyncstats.pfsyncs_stale++;
 686
 687                                 if (!(sp->sync_flags & PFSTATE_STALE)) {
 688                                         /* we have a better state, send it */
 689                                         if (sc->sc_mbuf != NULL && !stale)
 690                                                 pfsync_sendout(sc);
 691                                         stale++;
 692                                         if (!st->sync_flags)
 693                                                 pfsync_pack_state(
 694                                                     PFSYNC_ACT_UPD, st, flags);
 695                                 }
 696                                 continue;
 697                         }
 698                         pfsync_alloc_scrub_memory(&sp->dst, &st->dst);
 699                         pf_state_peer_ntoh(&sp->src, &st->src);
 700                         pf_state_peer_ntoh(&sp->dst, &st->dst);
 701                         st->expire = ntohl(sp->expire) + time_second;
 702                         st->timeout = sp->timeout;
 703                 }
 704                 if (stale && sc->sc_mbuf != NULL)
 705                         pfsync_sendout(sc);
 706                 crit_exit();
 707                 break;
 708         /*
 709          * It's not strictly necessary for us to support the "uncompressed"
 710          * delete action, but it's relatively simple and maintains consistency.
 711          */
 712         case PFSYNC_ACT_DEL:
 713                 if ((mp = m_pulldown(m, iplen + sizeof(*ph),
 714                     count * sizeof(*sp), &offp)) == NULL) {
 715                         pfsyncstats.pfsyncs_badlen++;
 716                         return;
 717                 }
 718
 719                 crit_enter();
 720                 for (i = 0, sp = (struct pfsync_state *)(mp->m_data + offp);
 721                     i < count; i++, sp++) {
 722                         bcopy(sp->id, &id_key.id, sizeof(id_key.id));
 723                         id_key.creatorid = sp->creatorid;
 724
 725                         st = pf_find_state_byid(&id_key);
 726                         if (st == NULL) {
 727                                 pfsyncstats.pfsyncs_badstate++;
 728                                 continue;
 729                         }
 730                         st->sync_flags |= PFSTATE_FROMSYNC;
 731                         pf_unlink_state(st);
 732                 }
 733                 crit_exit();
 734                 break;
 735         case PFSYNC_ACT_UPD_C: {
 736                 int update_requested = 0;
 737
 738                 if ((mp = m_pulldown(m, iplen + sizeof(*ph),
 739                     count * sizeof(*up), &offp)) == NULL) {
 740                         pfsyncstats.pfsyncs_badlen++;
 741                         return;
 742                 }
 743
 744                 crit_enter();
 745                 for (i = 0, up = (struct pfsync_state_upd *)(mp->m_data + offp);
 746                     i < count; i++, up++) {
 747                         /* check for invalid values */
 748                         if (up->timeout >= PFTM_MAX ||
 749                             up->src.state > PF_TCPS_PROXY_DST ||
 750                             up->dst.state > PF_TCPS_PROXY_DST) {
 751                                 if (pf_status.debug >= PF_DEBUG_MISC)
 752                                         kprintf("pfsync_insert: "
 753                                             "PFSYNC_ACT_UPD_C: "
 754                                             "invalid value\n");
 755                                 pfsyncstats.pfsyncs_badval++;
 756                                 continue;
 757                         }
 758
 759                         bcopy(up->id, &id_key.id, sizeof(id_key.id));
 760                         id_key.creatorid = up->creatorid;
 761
 762                         st = pf_find_state_byid(&id_key);
 763                         if (st == NULL) {
 764                                 /* We don't have this state. Ask for it. */
 765                                 error = pfsync_request_update(up, &src);
 766                                 if (error == ENOMEM) {
 767                                         crit_exit();
 768                                         goto done;
 769                                 }
 770                                 update_requested = 1;
 771                                 pfsyncstats.pfsyncs_badstate++;
 772                                 continue;
 773                         }
 774                         sk = st->key[PF_SK_WIRE]; /* XXX right one? */
 775                         sfail = 0;
 776                         if (sk->proto == IPPROTO_TCP) {
 777                                 /*
 778                                  * The state should never go backwards except
 779                                  * for syn-proxy states.  Neither should the
 780                                  * sequence window slide backwards.
 781                                  */
 782                                 if (st->src.state > up->src.state &&
 783                                     (st->src.state < PF_TCPS_PROXY_SRC ||
 784                                     up->src.state >= PF_TCPS_PROXY_SRC))
 785                                         sfail = 1;
 786                                 else if (st->dst.state > up->dst.state)
 787                                         sfail = 2;
 788                                 else if (SEQ_GT(st->src.seqlo,
 789                                     ntohl(up->src.seqlo)))
 790                                         sfail = 3;
 791                                 else if (st->dst.state >= TCPS_SYN_SENT &&
 792                                     SEQ_GT(st->dst.seqlo, ntohl(up->dst.seqlo)))
 793                                         sfail = 4;
 794                         } else {
 795                                 /*
 796                                  * Non-TCP protocol state machine always go
 797                                  * forwards
 798                                  */
 799                                 if (st->src.state > up->src.state)
 800                                         sfail = 5;
 801                                 else if (st->dst.state > up->dst.state)
 802                                         sfail = 6;
 803                         }
 804                         if (sfail) {
 805                                 if (pf_status.debug >= PF_DEBUG_MISC)
 806                                         kprintf("pfsync: ignoring stale update "
 807                                             "(%d) id: %016" PRIx64 " "
 808                                             "creatorid: %08x\n", sfail,
 809                                             be64toh(st->id),
 810                                             ntohl(st->creatorid));
 811                                 pfsyncstats.pfsyncs_stale++;
 812
 813                                 /* we have a better state, send it out */
 814                                 if ((!stale || update_requested) &&
 815                                     sc->sc_mbuf != NULL) {
 816                                         pfsync_sendout(sc);
 817                                         update_requested = 0;
 818                                 }
 819                                 stale++;
 820                                 if (!st->sync_flags)
 821                                         pfsync_pack_state(PFSYNC_ACT_UPD, st,
 822                                             PFSYNC_FLAG_STALE);
 823                                 continue;
 824                         }
 825                         pfsync_alloc_scrub_memory(&up->dst, &st->dst);
 826                         pf_state_peer_ntoh(&up->src, &st->src);
 827                         pf_state_peer_ntoh(&up->dst, &st->dst);
 828                         st->expire = ntohl(up->expire) + time_second;
 829                         st->timeout = up->timeout;
 830                 }
 831                 if ((update_requested || stale) && sc->sc_mbuf)
 832                         pfsync_sendout(sc);
 833                 crit_exit();
 834                 break;
 835         }
 836         case PFSYNC_ACT_DEL_C:
 837                 if ((mp = m_pulldown(m, iplen + sizeof(*ph),
 838                     count * sizeof(*dp), &offp)) == NULL) {
 839                         pfsyncstats.pfsyncs_badlen++;
 840                         return;
 841                 }
 842
 843                 crit_enter();
 844                 for (i = 0, dp = (struct pfsync_state_del *)(mp->m_data + offp);
 845                     i < count; i++, dp++) {
 846                         bcopy(dp->id, &id_key.id, sizeof(id_key.id));
 847                         id_key.creatorid = dp->creatorid;
 848
 849                         st = pf_find_state_byid(&id_key);
 850                         if (st == NULL) {
 851                                 pfsyncstats.pfsyncs_badstate++;
 852                                 continue;
 853                         }
 854                         st->sync_flags |= PFSTATE_FROMSYNC;
 855                         pf_unlink_state(st);
 856                 }
 857                 crit_exit();
 858                 break;
 859         case PFSYNC_ACT_INS_F:
 860         case PFSYNC_ACT_DEL_F:
 861                 /* not implemented */
 862                 break;
 863         case PFSYNC_ACT_UREQ:
 864                 if ((mp = m_pulldown(m, iplen + sizeof(*ph),
 865                     count * sizeof(*rup), &offp)) == NULL) {
 866                         pfsyncstats.pfsyncs_badlen++;
 867                         return;
 868                 }
 869
 870                 crit_enter();
 871                 if (sc->sc_mbuf != NULL)
 872                         pfsync_sendout(sc);
 873                 for (i = 0,
 874                     rup = (struct pfsync_state_upd_req *)(mp->m_data + offp);
 875                     i < count; i++, rup++) {
 876                         bcopy(rup->id, &id_key.id, sizeof(id_key.id));
 877                         id_key.creatorid = rup->creatorid;
 878
 879                         if (id_key.id == 0 && id_key.creatorid == 0) {
 880                                 sc->sc_ureq_received = mycpu->gd_time_seconds;
 881                                 if (sc->sc_bulk_send_next == NULL)
 882                                         sc->sc_bulk_send_next =
 883                                             TAILQ_FIRST(&state_list);
 884                                 sc->sc_bulk_terminator = sc->sc_bulk_send_next;
 885                                 if (pf_status.debug >= PF_DEBUG_MISC)
 886                                         kprintf("pfsync: received "
 887                                             "bulk update request\n");
 888                                 pfsync_send_bus(sc, PFSYNC_BUS_START);
 889                                 lwkt_reltoken(&pf_token);
 890                                 callout_init(&sc->sc_bulk_tmo);
 891                                 lwkt_gettoken(&pf_token);
 892                         } else {
 893                                 st = pf_find_state_byid(&id_key);
 894                                 if (st == NULL) {
 895                                         pfsyncstats.pfsyncs_badstate++;
 896                                         continue;
 897                                 }
 898                                 if (!st->sync_flags)
 899                                         pfsync_pack_state(PFSYNC_ACT_UPD,
 900                                             st, 0);
 901                         }
 902                 }
 903                 if (sc->sc_mbuf != NULL)
 904                         pfsync_sendout(sc);
 905                 crit_exit();
 906                 break;
 907         case PFSYNC_ACT_BUS:
 908                 /* If we're not waiting for a bulk update, who cares. */
 909                 if (sc->sc_ureq_sent == 0)
 910                         break;
 911
 912                 if ((mp = m_pulldown(m, iplen + sizeof(*ph),
 913                     sizeof(*bus), &offp)) == NULL) {
 914                         pfsyncstats.pfsyncs_badlen++;
 915                         return;
 916                 }
 917                 bus = (struct pfsync_state_bus *)(mp->m_data + offp);
 918                 switch (bus->status) {
 919                 case PFSYNC_BUS_START:
 920                         lwkt_reltoken(&pf_token);
 921                         callout_reset(&sc->sc_bulkfail_tmo,
 922                             pf_pool_limits[PF_LIMIT_STATES].limit /
 923                             (PFSYNC_BULKPACKETS * sc->sc_maxcount),
 924                             pfsync_bulkfail, LIST_FIRST(&pfsync_list));
 925                         lwkt_gettoken(&pf_token);
 926                         if (pf_status.debug >= PF_DEBUG_MISC)
 927                                 kprintf("pfsync: received bulk "
 928                                     "update start\n");
 929                         break;
 930                 case PFSYNC_BUS_END:
 931                         if (mycpu->gd_time_seconds - ntohl(bus->endtime) >=
 932                             sc->sc_ureq_sent) {
 933                                 /* that's it, we're happy */
 934                                 sc->sc_ureq_sent = 0;
 935                                 sc->sc_bulk_tries = 0;
 936                                 lwkt_reltoken(&pf_token);
 937                                 callout_stop(&sc->sc_bulkfail_tmo);
 938                                 lwkt_gettoken(&pf_token);
 939 #if NCARP > 0
 940                                 if (!pfsync_sync_ok) {
 941                                         lwkt_reltoken(&pf_token);
 942                                         carp_group_demote_adj(&sc->sc_if, -1);
 943                                         lwkt_gettoken(&pf_token);
 944                                 }
 945 #endif
 946                                 pfsync_sync_ok = 1;
 947                                 if (pf_status.debug >= PF_DEBUG_MISC)
 948                                         kprintf("pfsync: received valid "
 949                                             "bulk update end\n");
 950                         } else {
 951                                 if (pf_status.debug >= PF_DEBUG_MISC)
 952                                         kprintf("pfsync: received invalid "
 953                                             "bulk update end: bad timestamp\n");
 954                         }
 955                         break;
 956                 }
 957                 break;
 958 #ifdef IPSEC
 959         case PFSYNC_ACT_TDB_UPD:
 960                 if ((mp = m_pulldown(m, iplen + sizeof(*ph),
 961                     count * sizeof(*pt), &offp)) == NULL) {
 962                         pfsyncstats.pfsyncs_badlen++;
 963                         return;
 964                 }
 965                 crit_enter();
 966                 for (i = 0, pt = (struct pfsync_tdb *)(mp->m_data + offp);
 967                     i < count; i++, pt++)
 968                         pfsync_update_net_tdb(pt);
 969                 crit_exit();
 970                 break;
 971 #endif
 972         }
 973
 974 done:
 975         if (m)
 976                 m_freem(m);
 977 }
 978
 979 int
 980 pfsyncoutput(struct ifnet *ifp, struct mbuf *m, struct sockaddr *dst,
 981         struct rtentry *rt)
 982 {
 983         m_freem(m);
 984         return (0);
 985 }
 986
 987 /* ARGSUSED */
 988 int
 989 pfsyncioctl(struct ifnet *ifp, u_long cmd, caddr_t data, struct ucred *cr)
 990 {
 991         struct pfsync_softc *sc = ifp->if_softc;
 992         struct ifreq *ifr = (struct ifreq *)data;
 993         struct ip_moptions *imo = &sc->sc_imo;
 994         struct pfsyncreq pfsyncr;
 995         struct ifnet    *sifp;
 996         int error;
 997
 998         lwkt_gettoken(&pf_token);
 999
1000         switch (cmd) {
1001         case SIOCSIFADDR:
1002         case SIOCAIFADDR:
1003         case SIOCSIFDSTADDR:
1004         case SIOCSIFFLAGS:
1005                 if (ifp->if_flags & IFF_UP)
1006                         ifp->if_flags |= IFF_RUNNING;
1007                 else
1008                         ifp->if_flags &= ~IFF_RUNNING;
1009                 break;
1010         case SIOCSIFMTU:
1011                 if (ifr->ifr_mtu < PFSYNC_MINMTU) {
1012                         lwkt_reltoken(&pf_token);
1013                         return (EINVAL);
1014                 }
1015                 if (ifr->ifr_mtu > MCLBYTES)
1016                         ifr->ifr_mtu = MCLBYTES;
1017                 crit_enter();
1018                 if (ifr->ifr_mtu < ifp->if_mtu)
1019                         pfsync_sendout(sc);
1020                 pfsync_setmtu(sc, ifr->ifr_mtu);
1021                 crit_exit();
1022                 break;
1023         case SIOCGETPFSYNC:
1024                 bzero(&pfsyncr, sizeof(pfsyncr));
1025                 if (sc->sc_sync_ifp)
1026                         strlcpy(pfsyncr.pfsyncr_syncdev,
1027                             sc->sc_sync_ifp->if_xname, IFNAMSIZ);
1028                 pfsyncr.pfsyncr_syncpeer = sc->sc_sync_peer;
1029                 pfsyncr.pfsyncr_maxupdates = sc->sc_maxupdates;
1030                 lwkt_reltoken(&pf_token);
1031                 if ((error = copyout(&pfsyncr, ifr->ifr_data, sizeof(pfsyncr))))
1032                         return (error);
1033                 lwkt_gettoken(&pf_token);
1034                 break;
1035         case SIOCSETPFSYNC:
1036                 if ((error = priv_check_cred(cr, PRIV_ROOT, NULL_CRED_OKAY)) != 0) {
1037                         lwkt_reltoken(&pf_token);
1038                         return (error);
1039                 }
1040                 if ((error = copyin(ifr->ifr_data, &pfsyncr, sizeof(pfsyncr)))) {
1041                         lwkt_reltoken(&pf_token);
1042                         return (error);
1043                 }
1044
1045                 if (pfsyncr.pfsyncr_syncpeer.s_addr == 0)
1046                         sc->sc_sync_peer.s_addr = INADDR_PFSYNC_GROUP;
1047                 else
1048                         sc->sc_sync_peer.s_addr =
1049                             pfsyncr.pfsyncr_syncpeer.s_addr;
1050
1051                 if (pfsyncr.pfsyncr_maxupdates > 255) {
1052                         lwkt_reltoken(&pf_token);
1053                         return (EINVAL);
1054                 }
1055                 sc->sc_maxupdates = pfsyncr.pfsyncr_maxupdates;
1056
1057                 if (pfsyncr.pfsyncr_syncdev[0] == 0) {
1058                         sc->sc_sync_ifp = NULL;
1059                         if (sc->sc_mbuf_net != NULL) {
1060                                 /* Don't keep stale pfsync packets around. */
1061                                 crit_enter();
1062                                 m_freem(sc->sc_mbuf_net);
1063                                 sc->sc_mbuf_net = NULL;
1064                                 sc->sc_statep_net.s = NULL;
1065                                 crit_exit();
1066                         }
1067                         if (imo->imo_num_memberships > 0) {
1068                                 in_delmulti(imo->imo_membership[--imo->imo_num_memberships]);
1069                                 imo->imo_multicast_ifp = NULL;
1070                         }
1071                         break;
1072                 }
1073
1074                 if ((sifp = ifunit(pfsyncr.pfsyncr_syncdev)) == NULL) {
1075                         lwkt_reltoken(&pf_token);
1076                         return (EINVAL);
1077                 }
1078
1079                 crit_enter();
1080                 if (sifp->if_mtu < sc->sc_if.if_mtu ||
1081                     (sc->sc_sync_ifp != NULL &&
1082                     sifp->if_mtu < sc->sc_sync_ifp->if_mtu) ||
1083                     sifp->if_mtu < MCLBYTES - sizeof(struct ip))
1084                         pfsync_sendout(sc);
1085                 sc->sc_sync_ifp = sifp;
1086
1087                 pfsync_setmtu(sc, sc->sc_if.if_mtu);
1088
1089                 if (imo->imo_num_memberships > 0) {
1090                         in_delmulti(imo->imo_membership[--imo->imo_num_memberships]);
1091                         imo->imo_multicast_ifp = NULL;
1092                 }
1093
1094                 if (sc->sc_sync_ifp &&
1095                     sc->sc_sync_peer.s_addr == INADDR_PFSYNC_GROUP) {
1096                         struct in_addr addr;
1097
1098                         if (!(sc->sc_sync_ifp->if_flags & IFF_MULTICAST)) {
1099                                 sc->sc_sync_ifp = NULL;
1100                                 lwkt_reltoken(&pf_token);
1101                                 crit_exit();
1102                                 return (EADDRNOTAVAIL);
1103                         }
1104
1105                         addr.s_addr = INADDR_PFSYNC_GROUP;
1106
1107                         if ((imo->imo_membership[0] =
1108                             in_addmulti(&addr, sc->sc_sync_ifp)) == NULL) {
1109                                 sc->sc_sync_ifp = NULL;
1110                                 lwkt_reltoken(&pf_token);
1111                                 crit_exit();
1112                                 return (ENOBUFS);
1113                         }
1114                         imo->imo_num_memberships++;
1115                         imo->imo_multicast_ifp = sc->sc_sync_ifp;
1116                         imo->imo_multicast_ttl = PFSYNC_DFLTTL;
1117                         imo->imo_multicast_loop = 0;
1118                 }
1119
1120                 if (sc->sc_sync_ifp ||
1121                     sc->sc_sendaddr.s_addr != INADDR_PFSYNC_GROUP) {
1122                         /* Request a full state table update. */
1123                         sc->sc_ureq_sent = mycpu->gd_time_seconds;
1124 #if NCARP > 0
1125                         if (pfsync_sync_ok)
1126                                 carp_group_demote_adj(&sc->sc_if, 1);
1127 #endif
1128                         pfsync_sync_ok = 0;
1129                         if (pf_status.debug >= PF_DEBUG_MISC)
1130                                 kprintf("pfsync: requesting bulk update\n");
1131                         lwkt_reltoken(&pf_token);
1132                         callout_reset(&sc->sc_bulkfail_tmo, 5 * hz,
1133                             pfsync_bulkfail, LIST_FIRST(&pfsync_list));
1134                         lwkt_gettoken(&pf_token);
1135                         error = pfsync_request_update(NULL, NULL);
1136                         if (error == ENOMEM) {
1137                                 lwkt_reltoken(&pf_token);
1138                                 crit_exit();
1139                                 return (ENOMEM);
1140                         }
1141                         pfsync_sendout(sc);
1142                 }
1143                 crit_exit();
1144
1145                 break;
1146
1147         default:
1148                 lwkt_reltoken(&pf_token);
1149                 return (ENOTTY);
1150         }
1151
1152         lwkt_reltoken(&pf_token);
1153         return (0);
1154 }
1155
1156 void
1157 pfsync_setmtu(struct pfsync_softc *sc, int mtu_req)
1158 {
1159         int mtu;
1160
1161         if (sc->sc_sync_ifp && sc->sc_sync_ifp->if_mtu < mtu_req)
1162                 mtu = sc->sc_sync_ifp->if_mtu;
1163         else
1164                 mtu = mtu_req;
1165
1166         sc->sc_maxcount = (mtu - sizeof(struct pfsync_header)) /
1167             sizeof(struct pfsync_state);
1168         if (sc->sc_maxcount > 254)
1169             sc->sc_maxcount = 254;
1170         sc->sc_if.if_mtu = sizeof(struct pfsync_header) +
1171             sc->sc_maxcount * sizeof(struct pfsync_state);
1172 }
1173
1174 struct mbuf *
1175 pfsync_get_mbuf(struct pfsync_softc *sc, u_int8_t action, void **sp)
1176 {
1177         struct pfsync_header *h;
1178         struct mbuf *m;
1179         int len;
1180
1181         ASSERT_LWKT_TOKEN_HELD(&pf_token);
1182
1183         MGETHDR(m, M_WAITOK, MT_DATA);
1184         if (m == NULL) {
1185                 sc->sc_if.if_oerrors++;
1186                 return (NULL);
1187         }
1188
1189         switch (action) {
1190         case PFSYNC_ACT_CLR:
1191                 len = sizeof(struct pfsync_header) +
1192                     sizeof(struct pfsync_state_clr);
1193                 break;
1194         case PFSYNC_ACT_UPD_C:
1195                 len = (sc->sc_maxcount * sizeof(struct pfsync_state_upd)) +
1196                     sizeof(struct pfsync_header);
1197                 break;
1198         case PFSYNC_ACT_DEL_C:
1199                 len = (sc->sc_maxcount * sizeof(struct pfsync_state_del)) +
1200                     sizeof(struct pfsync_header);
1201                 break;
1202         case PFSYNC_ACT_UREQ:
1203                 len = (sc->sc_maxcount * sizeof(struct pfsync_state_upd_req)) +
1204                     sizeof(struct pfsync_header);
1205                 break;
1206         case PFSYNC_ACT_BUS:
1207                 len = sizeof(struct pfsync_header) +
1208                     sizeof(struct pfsync_state_bus);
1209                 break;
1210         case PFSYNC_ACT_TDB_UPD:
1211                 len = (sc->sc_maxcount * sizeof(struct pfsync_tdb)) +
1212                     sizeof(struct pfsync_header);
1213                 break;
1214         default:
1215                 len = (sc->sc_maxcount * sizeof(struct pfsync_state)) +
1216                     sizeof(struct pfsync_header);
1217                 break;
1218         }
1219
1220         if (len > MHLEN) {
1221                 MCLGET(m, M_WAITOK);
1222                 if ((m->m_flags & M_EXT) == 0) {
1223                         m_free(m);
1224                         sc->sc_if.if_oerrors++;
1225                         return (NULL);
1226                 }
1227                 m->m_data += (MCLBYTES - len) &~ (sizeof(long) - 1);
1228         } else
1229                 MH_ALIGN(m, len);
1230
1231         m->m_pkthdr.rcvif = NULL;
1232         m->m_pkthdr.len = m->m_len = sizeof(struct pfsync_header);
1233         h = mtod(m, struct pfsync_header *);
1234         h->version = PFSYNC_VERSION;
1235         h->af = 0;
1236         h->count = 0;
1237         h->action = action;
1238
1239         *sp = (void *)((char *)h + PFSYNC_HDRLEN);
1240         lwkt_reltoken(&pf_token);
1241         callout_reset(&sc->sc_tmo, hz, pfsync_timeout,
1242             LIST_FIRST(&pfsync_list));
1243         lwkt_gettoken(&pf_token);
1244         return (m);
1245 }
1246
1247 int
1248 pfsync_pack_state(u_int8_t action, struct pf_state *st, int flags)
1249 {
1250         struct ifnet *ifp = NULL;
1251         struct pfsync_softc *sc = pfsyncif;
1252         struct pfsync_header *h, *h_net;
1253         struct pfsync_state *sp = NULL;
1254         struct pfsync_state_upd *up = NULL;
1255         struct pfsync_state_del *dp = NULL;
1256         int ret = 0;
1257         u_int8_t i = 255, newaction = 0;
1258
1259         if (sc == NULL)
1260                 return (0);
1261         ifp = &sc->sc_if;
1262
1263         /*
1264          * If a packet falls in the forest and there's nobody around to
1265          * hear, does it make a sound?
1266          */
1267         if (ifp->if_bpf == NULL && sc->sc_sync_ifp == NULL &&
1268             sc->sc_sync_peer.s_addr == INADDR_PFSYNC_GROUP) {
1269                 /* Don't leave any stale pfsync packets hanging around. */
1270                 if (sc->sc_mbuf != NULL) {
1271                         m_freem(sc->sc_mbuf);
1272                         sc->sc_mbuf = NULL;
1273                         sc->sc_statep.s = NULL;
1274                 }
1275                 return (0);
1276         }
1277
1278         if (action >= PFSYNC_ACT_MAX)
1279                 return (EINVAL);
1280
1281         crit_enter();
1282         if (sc->sc_mbuf == NULL) {
1283                 if ((sc->sc_mbuf = pfsync_get_mbuf(sc, action,
1284                     (void *)&sc->sc_statep.s)) == NULL) {
1285                         crit_exit();
1286                         return (ENOMEM);
1287                 }
1288                 h = mtod(sc->sc_mbuf, struct pfsync_header *);
1289         } else {
1290                 h = mtod(sc->sc_mbuf, struct pfsync_header *);
1291                 if (h->action != action) {
1292                         pfsync_sendout(sc);
1293                         if ((sc->sc_mbuf = pfsync_get_mbuf(sc, action,
1294                             (void *)&sc->sc_statep.s)) == NULL) {
1295                                 crit_exit();
1296                                 return (ENOMEM);
1297                         }
1298                         h = mtod(sc->sc_mbuf, struct pfsync_header *);
1299                 } else {
1300                         /*
1301                          * If it's an update, look in the packet to see if
1302                          * we already have an update for the state.
1303                          */
1304                         if (action == PFSYNC_ACT_UPD && sc->sc_maxupdates) {
1305                                 struct pfsync_state *usp =
1306                                     (void *)((char *)h + PFSYNC_HDRLEN);
1307
1308                                 for (i = 0; i < h->count; i++) {
1309                                         if (!memcmp(usp->id, &st->id,
1310                                             PFSYNC_ID_LEN) &&
1311                                             usp->creatorid == st->creatorid) {
1312                                                 sp = usp;
1313                                                 sp->updates++;
1314                                                 break;
1315                                         }
1316                                         usp++;
1317                                 }
1318                         }
1319                 }
1320         }
1321
1322         st->pfsync_time = mycpu->gd_time_seconds;;
1323
1324         if (sp == NULL) {
1325                 /* not a "duplicate" update */
1326                 i = 255;
1327                 sp = sc->sc_statep.s++;
1328                 sc->sc_mbuf->m_pkthdr.len =
1329                     sc->sc_mbuf->m_len += sizeof(struct pfsync_state);
1330                 h->count++;
1331                 bzero(sp, sizeof(*sp));
1332
1333                 pfsync_state_export(sp, st);
1334
1335                 if (flags & PFSYNC_FLAG_STALE)
1336                         sp->sync_flags |= PFSTATE_STALE;
1337         } else {
1338                 pf_state_peer_hton(&st->src, &sp->src);
1339                 pf_state_peer_hton(&st->dst, &sp->dst);
1340
1341                 if (st->expire <= time_second)
1342                         sp->expire = htonl(0);
1343                 else
1344                         sp->expire = htonl(st->expire - time_second);
1345         }
1346
1347         /* do we need to build "compressed" actions for network transfer? */
1348         if (sc->sc_sync_ifp && flags & PFSYNC_FLAG_COMPRESS) {
1349                 switch (action) {
1350                 case PFSYNC_ACT_UPD:
1351                         newaction = PFSYNC_ACT_UPD_C;
1352                         break;
1353                 case PFSYNC_ACT_DEL:
1354                         newaction = PFSYNC_ACT_DEL_C;
1355                         break;
1356                 default:
1357                         /* by default we just send the uncompressed states */
1358                         break;
1359                 }
1360         }
1361
1362         if (newaction) {
1363                 if (sc->sc_mbuf_net == NULL) {
1364                         if ((sc->sc_mbuf_net = pfsync_get_mbuf(sc, newaction,
1365                             (void *)&sc->sc_statep_net.s)) == NULL) {
1366                                 crit_exit();
1367                                 return (ENOMEM);
1368                         }
1369                 }
1370                 h_net = mtod(sc->sc_mbuf_net, struct pfsync_header *);
1371
1372                 switch (newaction) {
1373                 case PFSYNC_ACT_UPD_C:
1374                         if (i != 255) {
1375                                 up = (void *)((char *)h_net +
1376                                     PFSYNC_HDRLEN + (i * sizeof(*up)));
1377                                 up->updates++;
1378                         } else {
1379                                 h_net->count++;
1380                                 sc->sc_mbuf_net->m_pkthdr.len =
1381                                     sc->sc_mbuf_net->m_len += sizeof(*up);
1382                                 up = sc->sc_statep_net.u++;
1383
1384                                 bzero(up, sizeof(*up));
1385                                 bcopy(&st->id, up->id, sizeof(up->id));
1386                                 up->creatorid = st->creatorid;
1387                         }
1388                         up->timeout = st->timeout;
1389                         up->expire = sp->expire;
1390                         up->src = sp->src;
1391                         up->dst = sp->dst;
1392                         break;
1393                 case PFSYNC_ACT_DEL_C:
1394                         sc->sc_mbuf_net->m_pkthdr.len =
1395                             sc->sc_mbuf_net->m_len += sizeof(*dp);
1396                         dp = sc->sc_statep_net.d++;
1397                         h_net->count++;
1398
1399                         bzero(dp, sizeof(*dp));
1400                         bcopy(&st->id, dp->id, sizeof(dp->id));
1401                         dp->creatorid = st->creatorid;
1402                         break;
1403                 }
1404         }
1405
1406         if (h->count == sc->sc_maxcount ||
1407             (sc->sc_maxupdates && (sp->updates >= sc->sc_maxupdates)))
1408                 ret = pfsync_sendout(sc);
1409
1410         crit_exit();
1411         return (ret);
1412 }
1413
1414 int
1415 pfsync_request_update(struct pfsync_state_upd *up, struct in_addr *src)
1416 {
1417         struct ifnet *ifp = NULL;
1418         struct pfsync_header *h;
1419         struct pfsync_softc *sc = pfsyncif;
1420         struct pfsync_state_upd_req *rup;
1421         int ret = 0;
1422
1423         if (sc == NULL)
1424                 return (0);
1425
1426         ifp = &sc->sc_if;
1427         if (sc->sc_mbuf == NULL) {
1428                 if ((sc->sc_mbuf = pfsync_get_mbuf(sc, PFSYNC_ACT_UREQ,
1429                     (void *)&sc->sc_statep.s)) == NULL)
1430                         return (ENOMEM);
1431                 h = mtod(sc->sc_mbuf, struct pfsync_header *);
1432         } else {
1433                 h = mtod(sc->sc_mbuf, struct pfsync_header *);
1434                 if (h->action != PFSYNC_ACT_UREQ) {
1435                         pfsync_sendout(sc);
1436                         if ((sc->sc_mbuf = pfsync_get_mbuf(sc, PFSYNC_ACT_UREQ,
1437                             (void *)&sc->sc_statep.s)) == NULL)
1438                                 return (ENOMEM);
1439                         h = mtod(sc->sc_mbuf, struct pfsync_header *);
1440                 }
1441         }
1442
1443         if (src != NULL)
1444                 sc->sc_sendaddr = *src;
1445         sc->sc_mbuf->m_pkthdr.len = sc->sc_mbuf->m_len += sizeof(*rup);
1446         h->count++;
1447         rup = sc->sc_statep.r++;
1448         bzero(rup, sizeof(*rup));
1449         if (up != NULL) {
1450                 bcopy(up->id, rup->id, sizeof(rup->id));
1451                 rup->creatorid = up->creatorid;
1452         }
1453
1454         if (h->count == sc->sc_maxcount)
1455                 ret = pfsync_sendout(sc);
1456
1457         return (ret);
1458 }
1459
1460 int
1461 pfsync_clear_states(u_int32_t creatorid, char *ifname)
1462 {
1463         struct ifnet *ifp = NULL;
1464         struct pfsync_softc *sc = pfsyncif;
1465         struct pfsync_state_clr *cp;
1466         int ret;
1467
1468         if (sc == NULL)
1469                 return (0);
1470
1471         ifp = &sc->sc_if;
1472         crit_enter();
1473         if (sc->sc_mbuf != NULL)
1474                 pfsync_sendout(sc);
1475         if ((sc->sc_mbuf = pfsync_get_mbuf(sc, PFSYNC_ACT_CLR,
1476             (void *)&sc->sc_statep.c)) == NULL) {
1477                 crit_exit();
1478                 return (ENOMEM);
1479         }
1480         sc->sc_mbuf->m_pkthdr.len = sc->sc_mbuf->m_len += sizeof(*cp);
1481         cp = sc->sc_statep.c;
1482         cp->creatorid = creatorid;
1483         if (ifname != NULL)
1484                 strlcpy(cp->ifname, ifname, IFNAMSIZ);
1485
1486         ret = (pfsync_sendout(sc));
1487         crit_exit();
1488         return (ret);
1489 }
1490
1491 void
1492 pfsync_timeout(void *v)
1493 {
1494         struct pfsync_softc *sc = v;
1495
1496         crit_enter();
1497         pfsync_sendout(sc);
1498         crit_exit();
1499 }
1500
1501 void
1502 pfsync_send_bus(struct pfsync_softc *sc, u_int8_t status)
1503 {
1504         struct pfsync_state_bus *bus;
1505
1506         if (sc->sc_mbuf != NULL)
1507                 pfsync_sendout(sc);
1508
1509         if (pfsync_sync_ok &&
1510             (sc->sc_mbuf = pfsync_get_mbuf(sc, PFSYNC_ACT_BUS,
1511             (void *)&sc->sc_statep.b)) != NULL) {
1512                 sc->sc_mbuf->m_pkthdr.len = sc->sc_mbuf->m_len += sizeof(*bus);
1513                 bus = sc->sc_statep.b;
1514                 bus->creatorid = pf_status.hostid;
1515                 bus->status = status;
1516                 bus->endtime = htonl(mycpu->gd_time_seconds - sc->sc_ureq_received);
1517                 pfsync_sendout(sc);
1518         }
1519 }
1520
1521 void
1522 pfsync_bulk_update(void *v)
1523 {
1524         struct pfsync_softc *sc = v;
1525         int i = 0;
1526         struct pf_state *state;
1527
1528         ASSERT_LWKT_TOKEN_HELD(&pf_token);
1529
1530         crit_enter();
1531         if (sc->sc_mbuf != NULL)
1532                 pfsync_sendout(sc);
1533
1534         /*
1535          * Grab at most PFSYNC_BULKPACKETS worth of states which have not
1536          * been sent since the latest request was made.
1537          */
1538         state = sc->sc_bulk_send_next;
1539         if (state)
1540                 do {
1541                         /* send state update if syncable and not already sent */
1542                         if (!state->sync_flags
1543                             && state->timeout < PFTM_MAX
1544                             && state->pfsync_time <= sc->sc_ureq_received) {
1545                                 pfsync_pack_state(PFSYNC_ACT_UPD, state, 0);
1546                                 i++;
1547                         }
1548
1549                         /* figure next state to send */
1550                         state = TAILQ_NEXT(state, entry_list);
1551
1552                         /* wrap to start of list if we hit the end */
1553                         if (!state)
1554                                 state = TAILQ_FIRST(&state_list);
1555                 } while (i < sc->sc_maxcount * PFSYNC_BULKPACKETS &&
1556                     state != sc->sc_bulk_terminator);
1557
1558         if (!state || state == sc->sc_bulk_terminator) {
1559                 /* we're done */
1560                 pfsync_send_bus(sc, PFSYNC_BUS_END);
1561                 sc->sc_ureq_received = 0;
1562                 sc->sc_bulk_send_next = NULL;
1563                 sc->sc_bulk_terminator = NULL;
1564                 lwkt_reltoken(&pf_token);
1565                 callout_stop(&sc->sc_bulk_tmo);
1566                 lwkt_gettoken(&pf_token);
1567                 if (pf_status.debug >= PF_DEBUG_MISC)
1568                         kprintf("pfsync: bulk update complete\n");
1569         } else {
1570                 /* look again for more in a bit */
1571                 lwkt_reltoken(&pf_token);
1572                 callout_reset(&sc->sc_bulk_tmo, 1, pfsync_timeout,
1573                             LIST_FIRST(&pfsync_list));
1574                 lwkt_gettoken(&pf_token);
1575                 sc->sc_bulk_send_next = state;
1576         }
1577         if (sc->sc_mbuf != NULL)
1578                 pfsync_sendout(sc);
1579         crit_exit();
1580 }
1581
1582 void
1583 pfsync_bulkfail(void *v)
1584 {
1585         struct pfsync_softc *sc = v;
1586         int error;
1587
1588         ASSERT_LWKT_TOKEN_HELD(&pf_token);
1589
1590         if (sc->sc_bulk_tries++ < PFSYNC_MAX_BULKTRIES) {
1591                 /* Try again in a bit */
1592                 lwkt_reltoken(&pf_token);
1593                 callout_reset(&sc->sc_bulkfail_tmo, 5 * hz, pfsync_bulkfail,
1594                     LIST_FIRST(&pfsync_list));
1595                 lwkt_gettoken(&pf_token);
1596                 crit_enter();
1597                 error = pfsync_request_update(NULL, NULL);
1598                 if (error == ENOMEM) {
1599                         if (pf_status.debug >= PF_DEBUG_MISC)
1600                                 kprintf("pfsync: cannot allocate mbufs for "
1601                                     "bulk update\n");
1602                 } else
1603                         pfsync_sendout(sc);
1604                 crit_exit();
1605         } else {
1606                 /* Pretend like the transfer was ok */
1607                 sc->sc_ureq_sent = 0;
1608                 sc->sc_bulk_tries = 0;
1609 #if NCARP > 0
1610                 if (!pfsync_sync_ok)
1611                         carp_group_demote_adj(&sc->sc_if, -1);
1612 #endif
1613                 pfsync_sync_ok = 1;
1614                 if (pf_status.debug >= PF_DEBUG_MISC)
1615                         kprintf("pfsync: failed to receive "
1616                             "bulk update status\n");
1617                 lwkt_reltoken(&pf_token);
1618                 callout_stop(&sc->sc_bulkfail_tmo);
1619                 lwkt_gettoken(&pf_token);
1620         }
1621 }
1622
1623 /* This must be called in splnet() */
1624 int
1625 pfsync_sendout(struct pfsync_softc *sc)
1626 {
1627 #if NBPFILTER > 0
1628         struct ifnet *ifp = &sc->sc_if;
1629 #endif
1630         struct mbuf *m;
1631
1632         ASSERT_LWKT_TOKEN_HELD(&pf_token);
1633
1634         lwkt_reltoken(&pf_token);
1635         callout_stop(&sc->sc_tmo);
1636         lwkt_gettoken(&pf_token);
1637
1638         if (sc->sc_mbuf == NULL)
1639                 return (0);
1640         m = sc->sc_mbuf;
1641         sc->sc_mbuf = NULL;
1642         sc->sc_statep.s = NULL;
1643
1644 #if NBPFILTER > 0
1645         if (ifp->if_bpf) {
1646                 lwkt_reltoken(&pf_token);
1647                 bpf_mtap(ifp->if_bpf, m, BPF_DIRECTION_OUT);
1648                 lwkt_gettoken(&pf_token);
1649         }
1650 #endif
1651
1652         if (sc->sc_mbuf_net) {
1653                 m_freem(m);
1654                 m = sc->sc_mbuf_net;
1655                 sc->sc_mbuf_net = NULL;
1656                 sc->sc_statep_net.s = NULL;
1657         }
1658
1659         return pfsync_sendout_mbuf(sc, m);
1660 }
1661
1662 int
1663 pfsync_sendout_mbuf(struct pfsync_softc *sc, struct mbuf *m)
1664 {
1665         struct sockaddr sa;
1666         struct ip *ip;
1667
1668         if (sc->sc_sync_ifp ||
1669             sc->sc_sync_peer.s_addr != INADDR_PFSYNC_GROUP) {
1670                 M_PREPEND(m, sizeof(struct ip), M_WAITOK);
1671                 if (m == NULL) {
1672                         pfsyncstats.pfsyncs_onomem++;
1673                         return (0);
1674                 }
1675                 ip = mtod(m, struct ip *);
1676                 ip->ip_v = IPVERSION;
1677                 ip->ip_hl = sizeof(*ip) >> 2;
1678                 ip->ip_tos = IPTOS_LOWDELAY;
1679                 ip->ip_len = htons(m->m_pkthdr.len);
1680                 ip->ip_id = htons(ip_randomid());
1681                 ip->ip_off = htons(IP_DF);
1682                 ip->ip_ttl = PFSYNC_DFLTTL;
1683                 ip->ip_p = IPPROTO_PFSYNC;
1684                 ip->ip_sum = 0;
1685
1686                 bzero(&sa, sizeof(sa));
1687                 ip->ip_src.s_addr = INADDR_ANY;
1688
1689                 if (sc->sc_sendaddr.s_addr == INADDR_PFSYNC_GROUP)
1690                         m->m_flags |= M_MCAST;
1691                 ip->ip_dst = sc->sc_sendaddr;
1692                 sc->sc_sendaddr.s_addr = sc->sc_sync_peer.s_addr;
1693
1694                 pfsyncstats.pfsyncs_opackets++;
1695
1696                 if (ip_output(m, NULL, NULL, IP_RAWOUTPUT, &sc->sc_imo, NULL))
1697                         pfsyncstats.pfsyncs_oerrors++;
1698         } else
1699                 m_freem(m);
1700
1701         return (0);
1702 }
1703
1704 static int
1705 pfsync_modevent(module_t mod, int type, void *data)
1706 {
1707         int error = 0;
1708
1709         struct pfsync_softc     *pfs_if, *tmp;
1710
1711         lwkt_gettoken(&pf_token);
1712
1713         switch (type) {
1714         case MOD_LOAD:
1715                 LIST_INIT(&pfsync_list);
1716                 lwkt_reltoken(&pf_token);
1717                 if_clone_attach(&pfsync_cloner);
1718                 lwkt_gettoken(&pf_token);
1719                 /* Override the function pointer for pf_ioctl.c */
1720                 break;
1721
1722         case MOD_UNLOAD:
1723                 lwkt_reltoken(&pf_token);
1724                 if_clone_detach(&pfsync_cloner);
1725                 lwkt_gettoken(&pf_token);
1726                 LIST_FOREACH_MUTABLE(pfs_if, &pfsync_list, sc_next, tmp) {
1727                         pfsync_clone_destroy(&pfs_if->sc_if);
1728                 }
1729                 break;
1730
1731         default:
1732                 error = EINVAL;
1733                 break;
1734         }
1735
1736         lwkt_reltoken(&pf_token);
1737         return error;
1738 }
1739
1740 static moduledata_t pfsync_mod = {
1741         "pfsync",
1742         pfsync_modevent,
1743         0
1744 };
1745
1746 #define PFSYNC_MODVER 44
1747
1748 DECLARE_MODULE(pfsync, pfsync_mod, SI_SUB_PSEUDO, SI_ORDER_ANY);
1749 MODULE_VERSION(pfsync, PFSYNC_MODVER);
1750
1751
1752