1 /*- 2 * SPDX-License-Identifier: (BSD-2-Clause-FreeBSD AND ISC) 3 * 4 * Copyright (c) 2002 Michael Shalayeff 5 * Copyright (c) 2012 Gleb Smirnoff <glebius@FreeBSD.org> 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 20 * IN NO EVENT SHALL THE AUTHOR OR HIS RELATIVES BE LIABLE FOR ANY DIRECT, 21 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 22 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 23 * SERVICES; LOSS OF MIND, USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 25 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 26 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF 27 * THE POSSIBILITY OF SUCH DAMAGE. 28 */ 29 30 /*- 31 * Copyright (c) 2009 David Gwynne <dlg@openbsd.org> 32 * 33 * Permission to use, copy, modify, and distribute this software for any 34 * purpose with or without fee is hereby granted, provided that the above 35 * copyright notice and this permission notice appear in all copies. 36 * 37 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 38 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 39 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 40 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 41 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 42 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 43 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 44 */ 45 46 /* 47 * $OpenBSD: if_pfsync.c,v 1.110 2009/02/24 05:39:19 dlg Exp $ 48 * 49 * Revisions picked from OpenBSD after revision 1.110 import: 50 * 1.119 - don't m_copydata() beyond the len of mbuf in pfsync_input() 51 * 1.118, 1.124, 1.148, 1.149, 1.151, 1.171 - fixes to bulk updates 52 * 1.120, 1.175 - use monotonic time_uptime 53 * 1.122 - reduce number of updates for non-TCP sessions 54 * 1.125, 1.127 - rewrite merge or stale processing 55 * 1.128 - cleanups 56 * 1.146 - bzero() mbuf before sparsely filling it with data 57 * 1.170 - SIOCSIFMTU checks 58 * 1.126, 1.142 - deferred packets processing 59 * 1.173 - correct expire time processing 60 */ 61 62 #include <sys/cdefs.h> 63 __FBSDID("$FreeBSD$"); 64 65 #include "opt_inet.h" 66 #include "opt_inet6.h" 67 #include "opt_pf.h" 68 69 #include <sys/param.h> 70 #include <sys/bus.h> 71 #include <sys/endian.h> 72 #include <sys/interrupt.h> 73 #include <sys/kernel.h> 74 #include <sys/lock.h> 75 #include <sys/mbuf.h> 76 #include <sys/module.h> 77 #include <sys/mutex.h> 78 #include <sys/priv.h> 79 #include <sys/protosw.h> 80 #include <sys/smp.h> 81 #include <sys/socket.h> 82 #include <sys/sockio.h> 83 #include <sys/sysctl.h> 84 #include <sys/syslog.h> 85 86 #include <net/bpf.h> 87 #include <net/if.h> 88 #include <net/if_var.h> 89 #include <net/if_clone.h> 90 #include <net/if_types.h> 91 #include <net/vnet.h> 92 #include <net/pfvar.h> 93 #include <net/if_pfsync.h> 94 95 #include <netinet/if_ether.h> 96 #include <netinet/in.h> 97 #include <netinet/in_var.h> 98 #include <netinet/ip.h> 99 #include <netinet/ip_carp.h> 100 #include <netinet/ip_var.h> 101 #include <netinet/tcp.h> 102 #include <netinet/tcp_fsm.h> 103 #include <netinet/tcp_seq.h> 104 105 #define PFSYNC_MINPKT ( \ 106 sizeof(struct ip) + \ 107 sizeof(struct pfsync_header) + \ 108 sizeof(struct pfsync_subheader) ) 109 110 struct pfsync_bucket; 111 112 struct pfsync_pkt { 113 struct ip *ip; 114 struct in_addr src; 115 u_int8_t flags; 116 }; 117 118 static int pfsync_upd_tcp(struct pf_state *, struct pfsync_state_peer *, 119 struct pfsync_state_peer *); 120 static int pfsync_in_clr(struct pfsync_pkt *, struct mbuf *, int, int); 121 static int pfsync_in_ins(struct pfsync_pkt *, struct mbuf *, int, int); 122 static int pfsync_in_iack(struct pfsync_pkt *, struct mbuf *, int, int); 123 static int pfsync_in_upd(struct pfsync_pkt *, struct mbuf *, int, int); 124 static int pfsync_in_upd_c(struct pfsync_pkt *, struct mbuf *, int, int); 125 static int pfsync_in_ureq(struct pfsync_pkt *, struct mbuf *, int, int); 126 static int pfsync_in_del(struct pfsync_pkt *, struct mbuf *, int, int); 127 static int pfsync_in_del_c(struct pfsync_pkt *, struct mbuf *, int, int); 128 static int pfsync_in_bus(struct pfsync_pkt *, struct mbuf *, int, int); 129 static int pfsync_in_tdb(struct pfsync_pkt *, struct mbuf *, int, int); 130 static int pfsync_in_eof(struct pfsync_pkt *, struct mbuf *, int, int); 131 static int pfsync_in_error(struct pfsync_pkt *, struct mbuf *, int, int); 132 133 static int (*pfsync_acts[])(struct pfsync_pkt *, struct mbuf *, int, int) = { 134 pfsync_in_clr, /* PFSYNC_ACT_CLR */ 135 pfsync_in_ins, /* PFSYNC_ACT_INS */ 136 pfsync_in_iack, /* PFSYNC_ACT_INS_ACK */ 137 pfsync_in_upd, /* PFSYNC_ACT_UPD */ 138 pfsync_in_upd_c, /* PFSYNC_ACT_UPD_C */ 139 pfsync_in_ureq, /* PFSYNC_ACT_UPD_REQ */ 140 pfsync_in_del, /* PFSYNC_ACT_DEL */ 141 pfsync_in_del_c, /* PFSYNC_ACT_DEL_C */ 142 pfsync_in_error, /* PFSYNC_ACT_INS_F */ 143 pfsync_in_error, /* PFSYNC_ACT_DEL_F */ 144 pfsync_in_bus, /* PFSYNC_ACT_BUS */ 145 pfsync_in_tdb, /* PFSYNC_ACT_TDB */ 146 pfsync_in_eof /* PFSYNC_ACT_EOF */ 147 }; 148 149 struct pfsync_q { 150 void (*write)(struct pf_state *, void *); 151 size_t len; 152 u_int8_t action; 153 }; 154 155 /* we have one of these for every PFSYNC_S_ */ 156 static void pfsync_out_state(struct pf_state *, void *); 157 static void pfsync_out_iack(struct pf_state *, void *); 158 static void pfsync_out_upd_c(struct pf_state *, void *); 159 static void pfsync_out_del(struct pf_state *, void *); 160 161 static struct pfsync_q pfsync_qs[] = { 162 { pfsync_out_state, sizeof(struct pfsync_state), PFSYNC_ACT_INS }, 163 { pfsync_out_iack, sizeof(struct pfsync_ins_ack), PFSYNC_ACT_INS_ACK }, 164 { pfsync_out_state, sizeof(struct pfsync_state), PFSYNC_ACT_UPD }, 165 { pfsync_out_upd_c, sizeof(struct pfsync_upd_c), PFSYNC_ACT_UPD_C }, 166 { pfsync_out_del, sizeof(struct pfsync_del_c), PFSYNC_ACT_DEL_C } 167 }; 168 169 static void pfsync_q_ins(struct pf_state *, int, bool); 170 static void pfsync_q_del(struct pf_state *, bool, struct pfsync_bucket *); 171 172 static void pfsync_update_state(struct pf_state *); 173 174 struct pfsync_upd_req_item { 175 TAILQ_ENTRY(pfsync_upd_req_item) ur_entry; 176 struct pfsync_upd_req ur_msg; 177 }; 178 179 struct pfsync_deferral { 180 struct pfsync_softc *pd_sc; 181 TAILQ_ENTRY(pfsync_deferral) pd_entry; 182 u_int pd_refs; 183 struct callout pd_tmo; 184 185 struct pf_state *pd_st; 186 struct mbuf *pd_m; 187 }; 188 189 struct pfsync_sofct; 190 191 struct pfsync_bucket 192 { 193 int b_id; 194 struct pfsync_softc *b_sc; 195 struct mtx b_mtx; 196 struct callout b_tmo; 197 int b_flags; 198 #define PFSYNCF_BUCKET_PUSH 0x00000001 199 200 size_t b_len; 201 TAILQ_HEAD(, pf_state) b_qs[PFSYNC_S_COUNT]; 202 TAILQ_HEAD(, pfsync_upd_req_item) b_upd_req_list; 203 TAILQ_HEAD(, pfsync_deferral) b_deferrals; 204 u_int b_deferred; 205 void *b_plus; 206 size_t b_pluslen; 207 208 struct ifaltq b_snd; 209 }; 210 211 struct pfsync_softc { 212 /* Configuration */ 213 struct ifnet *sc_ifp; 214 struct ifnet *sc_sync_if; 215 struct ip_moptions sc_imo; 216 struct in_addr sc_sync_peer; 217 uint32_t sc_flags; 218 #define PFSYNCF_OK 0x00000001 219 #define PFSYNCF_DEFER 0x00000002 220 uint8_t sc_maxupdates; 221 struct ip sc_template; 222 struct mtx sc_mtx; 223 224 /* Queued data */ 225 struct pfsync_bucket *sc_buckets; 226 227 /* Bulk update info */ 228 struct mtx sc_bulk_mtx; 229 uint32_t sc_ureq_sent; 230 int sc_bulk_tries; 231 uint32_t sc_ureq_received; 232 int sc_bulk_hashid; 233 uint64_t sc_bulk_stateid; 234 uint32_t sc_bulk_creatorid; 235 struct callout sc_bulk_tmo; 236 struct callout sc_bulkfail_tmo; 237 }; 238 239 #define PFSYNC_LOCK(sc) mtx_lock(&(sc)->sc_mtx) 240 #define PFSYNC_UNLOCK(sc) mtx_unlock(&(sc)->sc_mtx) 241 #define PFSYNC_LOCK_ASSERT(sc) mtx_assert(&(sc)->sc_mtx, MA_OWNED) 242 243 #define PFSYNC_BUCKET_LOCK(b) mtx_lock(&(b)->b_mtx) 244 #define PFSYNC_BUCKET_UNLOCK(b) mtx_unlock(&(b)->b_mtx) 245 #define PFSYNC_BUCKET_LOCK_ASSERT(b) mtx_assert(&(b)->b_mtx, MA_OWNED) 246 247 #define PFSYNC_BLOCK(sc) mtx_lock(&(sc)->sc_bulk_mtx) 248 #define PFSYNC_BUNLOCK(sc) mtx_unlock(&(sc)->sc_bulk_mtx) 249 #define PFSYNC_BLOCK_ASSERT(sc) mtx_assert(&(sc)->sc_bulk_mtx, MA_OWNED) 250 251 static const char pfsyncname[] = "pfsync"; 252 static MALLOC_DEFINE(M_PFSYNC, pfsyncname, "pfsync(4) data"); 253 VNET_DEFINE_STATIC(struct pfsync_softc *, pfsyncif) = NULL; 254 #define V_pfsyncif VNET(pfsyncif) 255 VNET_DEFINE_STATIC(void *, pfsync_swi_cookie) = NULL; 256 #define V_pfsync_swi_cookie VNET(pfsync_swi_cookie) 257 VNET_DEFINE_STATIC(struct pfsyncstats, pfsyncstats); 258 #define V_pfsyncstats VNET(pfsyncstats) 259 VNET_DEFINE_STATIC(int, pfsync_carp_adj) = CARP_MAXSKEW; 260 #define V_pfsync_carp_adj VNET(pfsync_carp_adj) 261 262 static void pfsync_timeout(void *); 263 static void pfsync_push(struct pfsync_bucket *); 264 static void pfsync_push_all(struct pfsync_softc *); 265 static void pfsyncintr(void *); 266 static int pfsync_multicast_setup(struct pfsync_softc *, struct ifnet *, 267 struct in_mfilter *imf); 268 static void pfsync_multicast_cleanup(struct pfsync_softc *); 269 static void pfsync_pointers_init(void); 270 static void pfsync_pointers_uninit(void); 271 static int pfsync_init(void); 272 static void pfsync_uninit(void); 273 274 static unsigned long pfsync_buckets; 275 276 SYSCTL_NODE(_net, OID_AUTO, pfsync, CTLFLAG_RW, 0, "PFSYNC"); 277 SYSCTL_STRUCT(_net_pfsync, OID_AUTO, stats, CTLFLAG_VNET | CTLFLAG_RW, 278 &VNET_NAME(pfsyncstats), pfsyncstats, 279 "PFSYNC statistics (struct pfsyncstats, net/if_pfsync.h)"); 280 SYSCTL_INT(_net_pfsync, OID_AUTO, carp_demotion_factor, CTLFLAG_RW, 281 &VNET_NAME(pfsync_carp_adj), 0, "pfsync's CARP demotion factor adjustment"); 282 SYSCTL_ULONG(_net_pfsync, OID_AUTO, pfsync_buckets, CTLFLAG_RDTUN, 283 &pfsync_buckets, 0, "Number of pfsync hash buckets"); 284 285 static int pfsync_clone_create(struct if_clone *, int, caddr_t); 286 static void pfsync_clone_destroy(struct ifnet *); 287 static int pfsync_alloc_scrub_memory(struct pfsync_state_peer *, 288 struct pf_state_peer *); 289 static int pfsyncoutput(struct ifnet *, struct mbuf *, 290 const struct sockaddr *, struct route *); 291 static int pfsyncioctl(struct ifnet *, u_long, caddr_t); 292 293 static int pfsync_defer(struct pf_state *, struct mbuf *); 294 static void pfsync_undefer(struct pfsync_deferral *, int); 295 static void pfsync_undefer_state(struct pf_state *, int); 296 static void pfsync_defer_tmo(void *); 297 298 static void pfsync_request_update(u_int32_t, u_int64_t); 299 static bool pfsync_update_state_req(struct pf_state *); 300 301 static void pfsync_drop(struct pfsync_softc *); 302 static void pfsync_sendout(int, int); 303 static void pfsync_send_plus(void *, size_t); 304 305 static void pfsync_bulk_start(void); 306 static void pfsync_bulk_status(u_int8_t); 307 static void pfsync_bulk_update(void *); 308 static void pfsync_bulk_fail(void *); 309 310 static void pfsync_detach_ifnet(struct ifnet *); 311 #ifdef IPSEC 312 static void pfsync_update_net_tdb(struct pfsync_tdb *); 313 #endif 314 static struct pfsync_bucket *pfsync_get_bucket(struct pfsync_softc *, 315 struct pf_state *); 316 317 318 #define PFSYNC_MAX_BULKTRIES 12 319 320 VNET_DEFINE(struct if_clone *, pfsync_cloner); 321 #define V_pfsync_cloner VNET(pfsync_cloner) 322 323 static int 324 pfsync_clone_create(struct if_clone *ifc, int unit, caddr_t param) 325 { 326 struct pfsync_softc *sc; 327 struct ifnet *ifp; 328 struct pfsync_bucket *b; 329 int c, q; 330 331 if (unit != 0) 332 return (EINVAL); 333 334 if (! pfsync_buckets) 335 pfsync_buckets = mp_ncpus * 2; 336 337 sc = malloc(sizeof(struct pfsync_softc), M_PFSYNC, M_WAITOK | M_ZERO); 338 sc->sc_flags |= PFSYNCF_OK; 339 sc->sc_maxupdates = 128; 340 341 ifp = sc->sc_ifp = if_alloc(IFT_PFSYNC); 342 if (ifp == NULL) { 343 free(sc, M_PFSYNC); 344 return (ENOSPC); 345 } 346 if_initname(ifp, pfsyncname, unit); 347 ifp->if_softc = sc; 348 ifp->if_ioctl = pfsyncioctl; 349 ifp->if_output = pfsyncoutput; 350 ifp->if_type = IFT_PFSYNC; 351 ifp->if_hdrlen = sizeof(struct pfsync_header); 352 ifp->if_mtu = ETHERMTU; 353 mtx_init(&sc->sc_mtx, pfsyncname, NULL, MTX_DEF); 354 mtx_init(&sc->sc_bulk_mtx, "pfsync bulk", NULL, MTX_DEF); 355 callout_init_mtx(&sc->sc_bulk_tmo, &sc->sc_bulk_mtx, 0); 356 callout_init_mtx(&sc->sc_bulkfail_tmo, &sc->sc_bulk_mtx, 0); 357 358 if_attach(ifp); 359 360 bpfattach(ifp, DLT_PFSYNC, PFSYNC_HDRLEN); 361 362 sc->sc_buckets = mallocarray(pfsync_buckets, sizeof(*sc->sc_buckets), 363 M_PFSYNC, M_ZERO | M_WAITOK); 364 for (c = 0; c < pfsync_buckets; c++) { 365 b = &sc->sc_buckets[c]; 366 mtx_init(&b->b_mtx, "pfsync bucket", NULL, MTX_DEF); 367 368 b->b_id = c; 369 b->b_sc = sc; 370 b->b_len = PFSYNC_MINPKT; 371 372 for (q = 0; q < PFSYNC_S_COUNT; q++) 373 TAILQ_INIT(&b->b_qs[q]); 374 375 TAILQ_INIT(&b->b_upd_req_list); 376 TAILQ_INIT(&b->b_deferrals); 377 378 callout_init(&b->b_tmo, 1); 379 380 b->b_snd.ifq_maxlen = ifqmaxlen; 381 } 382 383 V_pfsyncif = sc; 384 385 return (0); 386 } 387 388 static void 389 pfsync_clone_destroy(struct ifnet *ifp) 390 { 391 struct pfsync_softc *sc = ifp->if_softc; 392 struct pfsync_bucket *b; 393 int c; 394 395 for (c = 0; c < pfsync_buckets; c++) { 396 b = &sc->sc_buckets[c]; 397 /* 398 * At this stage, everything should have already been 399 * cleared by pfsync_uninit(), and we have only to 400 * drain callouts. 401 */ 402 while (b->b_deferred > 0) { 403 struct pfsync_deferral *pd = 404 TAILQ_FIRST(&b->b_deferrals); 405 406 TAILQ_REMOVE(&b->b_deferrals, pd, pd_entry); 407 b->b_deferred--; 408 if (callout_stop(&pd->pd_tmo) > 0) { 409 pf_release_state(pd->pd_st); 410 m_freem(pd->pd_m); 411 free(pd, M_PFSYNC); 412 } else { 413 pd->pd_refs++; 414 callout_drain(&pd->pd_tmo); 415 free(pd, M_PFSYNC); 416 } 417 } 418 419 callout_drain(&b->b_tmo); 420 } 421 422 callout_drain(&sc->sc_bulkfail_tmo); 423 callout_drain(&sc->sc_bulk_tmo); 424 425 if (!(sc->sc_flags & PFSYNCF_OK) && carp_demote_adj_p) 426 (*carp_demote_adj_p)(-V_pfsync_carp_adj, "pfsync destroy"); 427 bpfdetach(ifp); 428 if_detach(ifp); 429 430 pfsync_drop(sc); 431 432 if_free(ifp); 433 pfsync_multicast_cleanup(sc); 434 mtx_destroy(&sc->sc_mtx); 435 mtx_destroy(&sc->sc_bulk_mtx); 436 437 free(sc->sc_buckets, M_PFSYNC); 438 free(sc, M_PFSYNC); 439 440 V_pfsyncif = NULL; 441 } 442 443 static int 444 pfsync_alloc_scrub_memory(struct pfsync_state_peer *s, 445 struct pf_state_peer *d) 446 { 447 if (s->scrub.scrub_flag && d->scrub == NULL) { 448 d->scrub = uma_zalloc(V_pf_state_scrub_z, M_NOWAIT | M_ZERO); 449 if (d->scrub == NULL) 450 return (ENOMEM); 451 } 452 453 return (0); 454 } 455 456 457 static int 458 pfsync_state_import(struct pfsync_state *sp, u_int8_t flags) 459 { 460 struct pfsync_softc *sc = V_pfsyncif; 461 #ifndef __NO_STRICT_ALIGNMENT 462 struct pfsync_state_key key[2]; 463 #endif 464 struct pfsync_state_key *kw, *ks; 465 struct pf_state *st = NULL; 466 struct pf_state_key *skw = NULL, *sks = NULL; 467 struct pf_rule *r = NULL; 468 struct pfi_kif *kif; 469 int error; 470 471 PF_RULES_RASSERT(); 472 473 if (sp->creatorid == 0) { 474 if (V_pf_status.debug >= PF_DEBUG_MISC) 475 printf("%s: invalid creator id: %08x\n", __func__, 476 ntohl(sp->creatorid)); 477 return (EINVAL); 478 } 479 480 if ((kif = pfi_kif_find(sp->ifname)) == NULL) { 481 if (V_pf_status.debug >= PF_DEBUG_MISC) 482 printf("%s: unknown interface: %s\n", __func__, 483 sp->ifname); 484 if (flags & PFSYNC_SI_IOCTL) 485 return (EINVAL); 486 return (0); /* skip this state */ 487 } 488 489 /* 490 * If the ruleset checksums match or the state is coming from the ioctl, 491 * it's safe to associate the state with the rule of that number. 492 */ 493 if (sp->rule != htonl(-1) && sp->anchor == htonl(-1) && 494 (flags & (PFSYNC_SI_IOCTL | PFSYNC_SI_CKSUM)) && ntohl(sp->rule) < 495 pf_main_ruleset.rules[PF_RULESET_FILTER].active.rcount) 496 r = pf_main_ruleset.rules[ 497 PF_RULESET_FILTER].active.ptr_array[ntohl(sp->rule)]; 498 else 499 r = &V_pf_default_rule; 500 501 if ((r->max_states && 502 counter_u64_fetch(r->states_cur) >= r->max_states)) 503 goto cleanup; 504 505 /* 506 * XXXGL: consider M_WAITOK in ioctl path after. 507 */ 508 if ((st = uma_zalloc(V_pf_state_z, M_NOWAIT | M_ZERO)) == NULL) 509 goto cleanup; 510 511 if ((skw = uma_zalloc(V_pf_state_key_z, M_NOWAIT)) == NULL) 512 goto cleanup; 513 514 #ifndef __NO_STRICT_ALIGNMENT 515 bcopy(&sp->key, key, sizeof(struct pfsync_state_key) * 2); 516 kw = &key[PF_SK_WIRE]; 517 ks = &key[PF_SK_STACK]; 518 #else 519 kw = &sp->key[PF_SK_WIRE]; 520 ks = &sp->key[PF_SK_STACK]; 521 #endif 522 523 if (PF_ANEQ(&kw->addr[0], &ks->addr[0], sp->af) || 524 PF_ANEQ(&kw->addr[1], &ks->addr[1], sp->af) || 525 kw->port[0] != ks->port[0] || 526 kw->port[1] != ks->port[1]) { 527 sks = uma_zalloc(V_pf_state_key_z, M_NOWAIT); 528 if (sks == NULL) 529 goto cleanup; 530 } else 531 sks = skw; 532 533 /* allocate memory for scrub info */ 534 if (pfsync_alloc_scrub_memory(&sp->src, &st->src) || 535 pfsync_alloc_scrub_memory(&sp->dst, &st->dst)) 536 goto cleanup; 537 538 /* Copy to state key(s). */ 539 skw->addr[0] = kw->addr[0]; 540 skw->addr[1] = kw->addr[1]; 541 skw->port[0] = kw->port[0]; 542 skw->port[1] = kw->port[1]; 543 skw->proto = sp->proto; 544 skw->af = sp->af; 545 if (sks != skw) { 546 sks->addr[0] = ks->addr[0]; 547 sks->addr[1] = ks->addr[1]; 548 sks->port[0] = ks->port[0]; 549 sks->port[1] = ks->port[1]; 550 sks->proto = sp->proto; 551 sks->af = sp->af; 552 } 553 554 /* copy to state */ 555 bcopy(&sp->rt_addr, &st->rt_addr, sizeof(st->rt_addr)); 556 st->creation = time_uptime - ntohl(sp->creation); 557 st->expire = time_uptime; 558 if (sp->expire) { 559 uint32_t timeout; 560 561 timeout = r->timeout[sp->timeout]; 562 if (!timeout) 563 timeout = V_pf_default_rule.timeout[sp->timeout]; 564 565 /* sp->expire may have been adaptively scaled by export. */ 566 st->expire -= timeout - ntohl(sp->expire); 567 } 568 569 st->direction = sp->direction; 570 st->log = sp->log; 571 st->timeout = sp->timeout; 572 st->state_flags = sp->state_flags; 573 574 st->id = sp->id; 575 st->creatorid = sp->creatorid; 576 pf_state_peer_ntoh(&sp->src, &st->src); 577 pf_state_peer_ntoh(&sp->dst, &st->dst); 578 579 st->rule.ptr = r; 580 st->nat_rule.ptr = NULL; 581 st->anchor.ptr = NULL; 582 st->rt_kif = NULL; 583 584 st->pfsync_time = time_uptime; 585 st->sync_state = PFSYNC_S_NONE; 586 587 if (!(flags & PFSYNC_SI_IOCTL)) 588 st->state_flags |= PFSTATE_NOSYNC; 589 590 if ((error = pf_state_insert(kif, skw, sks, st)) != 0) 591 goto cleanup_state; 592 593 /* XXX when we have nat_rule/anchors, use STATE_INC_COUNTERS */ 594 counter_u64_add(r->states_cur, 1); 595 counter_u64_add(r->states_tot, 1); 596 597 if (!(flags & PFSYNC_SI_IOCTL)) { 598 st->state_flags &= ~PFSTATE_NOSYNC; 599 if (st->state_flags & PFSTATE_ACK) { 600 pfsync_q_ins(st, PFSYNC_S_IACK, true); 601 pfsync_push_all(sc); 602 } 603 } 604 st->state_flags &= ~PFSTATE_ACK; 605 PF_STATE_UNLOCK(st); 606 607 return (0); 608 609 cleanup: 610 error = ENOMEM; 611 if (skw == sks) 612 sks = NULL; 613 if (skw != NULL) 614 uma_zfree(V_pf_state_key_z, skw); 615 if (sks != NULL) 616 uma_zfree(V_pf_state_key_z, sks); 617 618 cleanup_state: /* pf_state_insert() frees the state keys. */ 619 if (st) { 620 if (st->dst.scrub) 621 uma_zfree(V_pf_state_scrub_z, st->dst.scrub); 622 if (st->src.scrub) 623 uma_zfree(V_pf_state_scrub_z, st->src.scrub); 624 uma_zfree(V_pf_state_z, st); 625 } 626 return (error); 627 } 628 629 static int 630 pfsync_input(struct mbuf **mp, int *offp __unused, int proto __unused) 631 { 632 struct pfsync_softc *sc = V_pfsyncif; 633 struct pfsync_pkt pkt; 634 struct mbuf *m = *mp; 635 struct ip *ip = mtod(m, struct ip *); 636 struct pfsync_header *ph; 637 struct pfsync_subheader subh; 638 639 int offset, len; 640 int rv; 641 uint16_t count; 642 643 PF_RULES_RLOCK_TRACKER; 644 645 *mp = NULL; 646 V_pfsyncstats.pfsyncs_ipackets++; 647 648 /* Verify that we have a sync interface configured. */ 649 if (!sc || !sc->sc_sync_if || !V_pf_status.running || 650 (sc->sc_ifp->if_drv_flags & IFF_DRV_RUNNING) == 0) 651 goto done; 652 653 /* verify that the packet came in on the right interface */ 654 if (sc->sc_sync_if != m->m_pkthdr.rcvif) { 655 V_pfsyncstats.pfsyncs_badif++; 656 goto done; 657 } 658 659 if_inc_counter(sc->sc_ifp, IFCOUNTER_IPACKETS, 1); 660 if_inc_counter(sc->sc_ifp, IFCOUNTER_IBYTES, m->m_pkthdr.len); 661 /* verify that the IP TTL is 255. */ 662 if (ip->ip_ttl != PFSYNC_DFLTTL) { 663 V_pfsyncstats.pfsyncs_badttl++; 664 goto done; 665 } 666 667 offset = ip->ip_hl << 2; 668 if (m->m_pkthdr.len < offset + sizeof(*ph)) { 669 V_pfsyncstats.pfsyncs_hdrops++; 670 goto done; 671 } 672 673 if (offset + sizeof(*ph) > m->m_len) { 674 if (m_pullup(m, offset + sizeof(*ph)) == NULL) { 675 V_pfsyncstats.pfsyncs_hdrops++; 676 return (IPPROTO_DONE); 677 } 678 ip = mtod(m, struct ip *); 679 } 680 ph = (struct pfsync_header *)((char *)ip + offset); 681 682 /* verify the version */ 683 if (ph->version != PFSYNC_VERSION) { 684 V_pfsyncstats.pfsyncs_badver++; 685 goto done; 686 } 687 688 len = ntohs(ph->len) + offset; 689 if (m->m_pkthdr.len < len) { 690 V_pfsyncstats.pfsyncs_badlen++; 691 goto done; 692 } 693 694 /* Cheaper to grab this now than having to mess with mbufs later */ 695 pkt.ip = ip; 696 pkt.src = ip->ip_src; 697 pkt.flags = 0; 698 699 /* 700 * Trusting pf_chksum during packet processing, as well as seeking 701 * in interface name tree, require holding PF_RULES_RLOCK(). 702 */ 703 PF_RULES_RLOCK(); 704 if (!bcmp(&ph->pfcksum, &V_pf_status.pf_chksum, PF_MD5_DIGEST_LENGTH)) 705 pkt.flags |= PFSYNC_SI_CKSUM; 706 707 offset += sizeof(*ph); 708 while (offset <= len - sizeof(subh)) { 709 m_copydata(m, offset, sizeof(subh), (caddr_t)&subh); 710 offset += sizeof(subh); 711 712 if (subh.action >= PFSYNC_ACT_MAX) { 713 V_pfsyncstats.pfsyncs_badact++; 714 PF_RULES_RUNLOCK(); 715 goto done; 716 } 717 718 count = ntohs(subh.count); 719 V_pfsyncstats.pfsyncs_iacts[subh.action] += count; 720 rv = (*pfsync_acts[subh.action])(&pkt, m, offset, count); 721 if (rv == -1) { 722 PF_RULES_RUNLOCK(); 723 return (IPPROTO_DONE); 724 } 725 726 offset += rv; 727 } 728 PF_RULES_RUNLOCK(); 729 730 done: 731 m_freem(m); 732 return (IPPROTO_DONE); 733 } 734 735 static int 736 pfsync_in_clr(struct pfsync_pkt *pkt, struct mbuf *m, int offset, int count) 737 { 738 struct pfsync_clr *clr; 739 struct mbuf *mp; 740 int len = sizeof(*clr) * count; 741 int i, offp; 742 u_int32_t creatorid; 743 744 mp = m_pulldown(m, offset, len, &offp); 745 if (mp == NULL) { 746 V_pfsyncstats.pfsyncs_badlen++; 747 return (-1); 748 } 749 clr = (struct pfsync_clr *)(mp->m_data + offp); 750 751 for (i = 0; i < count; i++) { 752 creatorid = clr[i].creatorid; 753 754 if (clr[i].ifname[0] != '\0' && 755 pfi_kif_find(clr[i].ifname) == NULL) 756 continue; 757 758 for (int i = 0; i <= pf_hashmask; i++) { 759 struct pf_idhash *ih = &V_pf_idhash[i]; 760 struct pf_state *s; 761 relock: 762 PF_HASHROW_LOCK(ih); 763 LIST_FOREACH(s, &ih->states, entry) { 764 if (s->creatorid == creatorid) { 765 s->state_flags |= PFSTATE_NOSYNC; 766 pf_unlink_state(s, PF_ENTER_LOCKED); 767 goto relock; 768 } 769 } 770 PF_HASHROW_UNLOCK(ih); 771 } 772 } 773 774 return (len); 775 } 776 777 static int 778 pfsync_in_ins(struct pfsync_pkt *pkt, struct mbuf *m, int offset, int count) 779 { 780 struct mbuf *mp; 781 struct pfsync_state *sa, *sp; 782 int len = sizeof(*sp) * count; 783 int i, offp; 784 785 mp = m_pulldown(m, offset, len, &offp); 786 if (mp == NULL) { 787 V_pfsyncstats.pfsyncs_badlen++; 788 return (-1); 789 } 790 sa = (struct pfsync_state *)(mp->m_data + offp); 791 792 for (i = 0; i < count; i++) { 793 sp = &sa[i]; 794 795 /* Check for invalid values. */ 796 if (sp->timeout >= PFTM_MAX || 797 sp->src.state > PF_TCPS_PROXY_DST || 798 sp->dst.state > PF_TCPS_PROXY_DST || 799 sp->direction > PF_OUT || 800 (sp->af != AF_INET && sp->af != AF_INET6)) { 801 if (V_pf_status.debug >= PF_DEBUG_MISC) 802 printf("%s: invalid value\n", __func__); 803 V_pfsyncstats.pfsyncs_badval++; 804 continue; 805 } 806 807 if (pfsync_state_import(sp, pkt->flags) == ENOMEM) 808 /* Drop out, but process the rest of the actions. */ 809 break; 810 } 811 812 return (len); 813 } 814 815 static int 816 pfsync_in_iack(struct pfsync_pkt *pkt, struct mbuf *m, int offset, int count) 817 { 818 struct pfsync_ins_ack *ia, *iaa; 819 struct pf_state *st; 820 821 struct mbuf *mp; 822 int len = count * sizeof(*ia); 823 int offp, i; 824 825 mp = m_pulldown(m, offset, len, &offp); 826 if (mp == NULL) { 827 V_pfsyncstats.pfsyncs_badlen++; 828 return (-1); 829 } 830 iaa = (struct pfsync_ins_ack *)(mp->m_data + offp); 831 832 for (i = 0; i < count; i++) { 833 ia = &iaa[i]; 834 835 st = pf_find_state_byid(ia->id, ia->creatorid); 836 if (st == NULL) 837 continue; 838 839 if (st->state_flags & PFSTATE_ACK) { 840 pfsync_undefer_state(st, 0); 841 } 842 PF_STATE_UNLOCK(st); 843 } 844 /* 845 * XXX this is not yet implemented, but we know the size of the 846 * message so we can skip it. 847 */ 848 849 return (count * sizeof(struct pfsync_ins_ack)); 850 } 851 852 static int 853 pfsync_upd_tcp(struct pf_state *st, struct pfsync_state_peer *src, 854 struct pfsync_state_peer *dst) 855 { 856 int sync = 0; 857 858 PF_STATE_LOCK_ASSERT(st); 859 860 /* 861 * The state should never go backwards except 862 * for syn-proxy states. Neither should the 863 * sequence window slide backwards. 864 */ 865 if ((st->src.state > src->state && 866 (st->src.state < PF_TCPS_PROXY_SRC || 867 src->state >= PF_TCPS_PROXY_SRC)) || 868 869 (st->src.state == src->state && 870 SEQ_GT(st->src.seqlo, ntohl(src->seqlo)))) 871 sync++; 872 else 873 pf_state_peer_ntoh(src, &st->src); 874 875 if ((st->dst.state > dst->state) || 876 877 (st->dst.state >= TCPS_SYN_SENT && 878 SEQ_GT(st->dst.seqlo, ntohl(dst->seqlo)))) 879 sync++; 880 else 881 pf_state_peer_ntoh(dst, &st->dst); 882 883 return (sync); 884 } 885 886 static int 887 pfsync_in_upd(struct pfsync_pkt *pkt, struct mbuf *m, int offset, int count) 888 { 889 struct pfsync_softc *sc = V_pfsyncif; 890 struct pfsync_state *sa, *sp; 891 struct pf_state *st; 892 int sync; 893 894 struct mbuf *mp; 895 int len = count * sizeof(*sp); 896 int offp, i; 897 898 mp = m_pulldown(m, offset, len, &offp); 899 if (mp == NULL) { 900 V_pfsyncstats.pfsyncs_badlen++; 901 return (-1); 902 } 903 sa = (struct pfsync_state *)(mp->m_data + offp); 904 905 for (i = 0; i < count; i++) { 906 sp = &sa[i]; 907 908 /* check for invalid values */ 909 if (sp->timeout >= PFTM_MAX || 910 sp->src.state > PF_TCPS_PROXY_DST || 911 sp->dst.state > PF_TCPS_PROXY_DST) { 912 if (V_pf_status.debug >= PF_DEBUG_MISC) { 913 printf("pfsync_input: PFSYNC_ACT_UPD: " 914 "invalid value\n"); 915 } 916 V_pfsyncstats.pfsyncs_badval++; 917 continue; 918 } 919 920 st = pf_find_state_byid(sp->id, sp->creatorid); 921 if (st == NULL) { 922 /* insert the update */ 923 if (pfsync_state_import(sp, pkt->flags)) 924 V_pfsyncstats.pfsyncs_badstate++; 925 continue; 926 } 927 928 if (st->state_flags & PFSTATE_ACK) { 929 pfsync_undefer_state(st, 1); 930 } 931 932 if (st->key[PF_SK_WIRE]->proto == IPPROTO_TCP) 933 sync = pfsync_upd_tcp(st, &sp->src, &sp->dst); 934 else { 935 sync = 0; 936 937 /* 938 * Non-TCP protocol state machine always go 939 * forwards 940 */ 941 if (st->src.state > sp->src.state) 942 sync++; 943 else 944 pf_state_peer_ntoh(&sp->src, &st->src); 945 if (st->dst.state > sp->dst.state) 946 sync++; 947 else 948 pf_state_peer_ntoh(&sp->dst, &st->dst); 949 } 950 if (sync < 2) { 951 pfsync_alloc_scrub_memory(&sp->dst, &st->dst); 952 pf_state_peer_ntoh(&sp->dst, &st->dst); 953 st->expire = time_uptime; 954 st->timeout = sp->timeout; 955 } 956 st->pfsync_time = time_uptime; 957 958 if (sync) { 959 V_pfsyncstats.pfsyncs_stale++; 960 961 pfsync_update_state(st); 962 PF_STATE_UNLOCK(st); 963 pfsync_push_all(sc); 964 continue; 965 } 966 PF_STATE_UNLOCK(st); 967 } 968 969 return (len); 970 } 971 972 static int 973 pfsync_in_upd_c(struct pfsync_pkt *pkt, struct mbuf *m, int offset, int count) 974 { 975 struct pfsync_softc *sc = V_pfsyncif; 976 struct pfsync_upd_c *ua, *up; 977 struct pf_state *st; 978 int len = count * sizeof(*up); 979 int sync; 980 struct mbuf *mp; 981 int offp, i; 982 983 mp = m_pulldown(m, offset, len, &offp); 984 if (mp == NULL) { 985 V_pfsyncstats.pfsyncs_badlen++; 986 return (-1); 987 } 988 ua = (struct pfsync_upd_c *)(mp->m_data + offp); 989 990 for (i = 0; i < count; i++) { 991 up = &ua[i]; 992 993 /* check for invalid values */ 994 if (up->timeout >= PFTM_MAX || 995 up->src.state > PF_TCPS_PROXY_DST || 996 up->dst.state > PF_TCPS_PROXY_DST) { 997 if (V_pf_status.debug >= PF_DEBUG_MISC) { 998 printf("pfsync_input: " 999 "PFSYNC_ACT_UPD_C: " 1000 "invalid value\n"); 1001 } 1002 V_pfsyncstats.pfsyncs_badval++; 1003 continue; 1004 } 1005 1006 st = pf_find_state_byid(up->id, up->creatorid); 1007 if (st == NULL) { 1008 /* We don't have this state. Ask for it. */ 1009 PFSYNC_BUCKET_LOCK(&sc->sc_buckets[0]); 1010 pfsync_request_update(up->creatorid, up->id); 1011 PFSYNC_BUCKET_UNLOCK(&sc->sc_buckets[0]); 1012 continue; 1013 } 1014 1015 if (st->state_flags & PFSTATE_ACK) { 1016 pfsync_undefer_state(st, 1); 1017 } 1018 1019 if (st->key[PF_SK_WIRE]->proto == IPPROTO_TCP) 1020 sync = pfsync_upd_tcp(st, &up->src, &up->dst); 1021 else { 1022 sync = 0; 1023 1024 /* 1025 * Non-TCP protocol state machine always go 1026 * forwards 1027 */ 1028 if (st->src.state > up->src.state) 1029 sync++; 1030 else 1031 pf_state_peer_ntoh(&up->src, &st->src); 1032 if (st->dst.state > up->dst.state) 1033 sync++; 1034 else 1035 pf_state_peer_ntoh(&up->dst, &st->dst); 1036 } 1037 if (sync < 2) { 1038 pfsync_alloc_scrub_memory(&up->dst, &st->dst); 1039 pf_state_peer_ntoh(&up->dst, &st->dst); 1040 st->expire = time_uptime; 1041 st->timeout = up->timeout; 1042 } 1043 st->pfsync_time = time_uptime; 1044 1045 if (sync) { 1046 V_pfsyncstats.pfsyncs_stale++; 1047 1048 pfsync_update_state(st); 1049 PF_STATE_UNLOCK(st); 1050 pfsync_push_all(sc); 1051 continue; 1052 } 1053 PF_STATE_UNLOCK(st); 1054 } 1055 1056 return (len); 1057 } 1058 1059 static int 1060 pfsync_in_ureq(struct pfsync_pkt *pkt, struct mbuf *m, int offset, int count) 1061 { 1062 struct pfsync_upd_req *ur, *ura; 1063 struct mbuf *mp; 1064 int len = count * sizeof(*ur); 1065 int i, offp; 1066 1067 struct pf_state *st; 1068 1069 mp = m_pulldown(m, offset, len, &offp); 1070 if (mp == NULL) { 1071 V_pfsyncstats.pfsyncs_badlen++; 1072 return (-1); 1073 } 1074 ura = (struct pfsync_upd_req *)(mp->m_data + offp); 1075 1076 for (i = 0; i < count; i++) { 1077 ur = &ura[i]; 1078 1079 if (ur->id == 0 && ur->creatorid == 0) 1080 pfsync_bulk_start(); 1081 else { 1082 st = pf_find_state_byid(ur->id, ur->creatorid); 1083 if (st == NULL) { 1084 V_pfsyncstats.pfsyncs_badstate++; 1085 continue; 1086 } 1087 if (st->state_flags & PFSTATE_NOSYNC) { 1088 PF_STATE_UNLOCK(st); 1089 continue; 1090 } 1091 1092 pfsync_update_state_req(st); 1093 PF_STATE_UNLOCK(st); 1094 } 1095 } 1096 1097 return (len); 1098 } 1099 1100 static int 1101 pfsync_in_del(struct pfsync_pkt *pkt, struct mbuf *m, int offset, int count) 1102 { 1103 struct mbuf *mp; 1104 struct pfsync_state *sa, *sp; 1105 struct pf_state *st; 1106 int len = count * sizeof(*sp); 1107 int offp, i; 1108 1109 mp = m_pulldown(m, offset, len, &offp); 1110 if (mp == NULL) { 1111 V_pfsyncstats.pfsyncs_badlen++; 1112 return (-1); 1113 } 1114 sa = (struct pfsync_state *)(mp->m_data + offp); 1115 1116 for (i = 0; i < count; i++) { 1117 sp = &sa[i]; 1118 1119 st = pf_find_state_byid(sp->id, sp->creatorid); 1120 if (st == NULL) { 1121 V_pfsyncstats.pfsyncs_badstate++; 1122 continue; 1123 } 1124 st->state_flags |= PFSTATE_NOSYNC; 1125 pf_unlink_state(st, PF_ENTER_LOCKED); 1126 } 1127 1128 return (len); 1129 } 1130 1131 static int 1132 pfsync_in_del_c(struct pfsync_pkt *pkt, struct mbuf *m, int offset, int count) 1133 { 1134 struct mbuf *mp; 1135 struct pfsync_del_c *sa, *sp; 1136 struct pf_state *st; 1137 int len = count * sizeof(*sp); 1138 int offp, i; 1139 1140 mp = m_pulldown(m, offset, len, &offp); 1141 if (mp == NULL) { 1142 V_pfsyncstats.pfsyncs_badlen++; 1143 return (-1); 1144 } 1145 sa = (struct pfsync_del_c *)(mp->m_data + offp); 1146 1147 for (i = 0; i < count; i++) { 1148 sp = &sa[i]; 1149 1150 st = pf_find_state_byid(sp->id, sp->creatorid); 1151 if (st == NULL) { 1152 V_pfsyncstats.pfsyncs_badstate++; 1153 continue; 1154 } 1155 1156 st->state_flags |= PFSTATE_NOSYNC; 1157 pf_unlink_state(st, PF_ENTER_LOCKED); 1158 } 1159 1160 return (len); 1161 } 1162 1163 static int 1164 pfsync_in_bus(struct pfsync_pkt *pkt, struct mbuf *m, int offset, int count) 1165 { 1166 struct pfsync_softc *sc = V_pfsyncif; 1167 struct pfsync_bus *bus; 1168 struct mbuf *mp; 1169 int len = count * sizeof(*bus); 1170 int offp; 1171 1172 PFSYNC_BLOCK(sc); 1173 1174 /* If we're not waiting for a bulk update, who cares. */ 1175 if (sc->sc_ureq_sent == 0) { 1176 PFSYNC_BUNLOCK(sc); 1177 return (len); 1178 } 1179 1180 mp = m_pulldown(m, offset, len, &offp); 1181 if (mp == NULL) { 1182 PFSYNC_BUNLOCK(sc); 1183 V_pfsyncstats.pfsyncs_badlen++; 1184 return (-1); 1185 } 1186 bus = (struct pfsync_bus *)(mp->m_data + offp); 1187 1188 switch (bus->status) { 1189 case PFSYNC_BUS_START: 1190 callout_reset(&sc->sc_bulkfail_tmo, 4 * hz + 1191 V_pf_limits[PF_LIMIT_STATES].limit / 1192 ((sc->sc_ifp->if_mtu - PFSYNC_MINPKT) / 1193 sizeof(struct pfsync_state)), 1194 pfsync_bulk_fail, sc); 1195 if (V_pf_status.debug >= PF_DEBUG_MISC) 1196 printf("pfsync: received bulk update start\n"); 1197 break; 1198 1199 case PFSYNC_BUS_END: 1200 if (time_uptime - ntohl(bus->endtime) >= 1201 sc->sc_ureq_sent) { 1202 /* that's it, we're happy */ 1203 sc->sc_ureq_sent = 0; 1204 sc->sc_bulk_tries = 0; 1205 callout_stop(&sc->sc_bulkfail_tmo); 1206 if (!(sc->sc_flags & PFSYNCF_OK) && carp_demote_adj_p) 1207 (*carp_demote_adj_p)(-V_pfsync_carp_adj, 1208 "pfsync bulk done"); 1209 sc->sc_flags |= PFSYNCF_OK; 1210 if (V_pf_status.debug >= PF_DEBUG_MISC) 1211 printf("pfsync: received valid " 1212 "bulk update end\n"); 1213 } else { 1214 if (V_pf_status.debug >= PF_DEBUG_MISC) 1215 printf("pfsync: received invalid " 1216 "bulk update end: bad timestamp\n"); 1217 } 1218 break; 1219 } 1220 PFSYNC_BUNLOCK(sc); 1221 1222 return (len); 1223 } 1224 1225 static int 1226 pfsync_in_tdb(struct pfsync_pkt *pkt, struct mbuf *m, int offset, int count) 1227 { 1228 int len = count * sizeof(struct pfsync_tdb); 1229 1230 #if defined(IPSEC) 1231 struct pfsync_tdb *tp; 1232 struct mbuf *mp; 1233 int offp; 1234 int i; 1235 int s; 1236 1237 mp = m_pulldown(m, offset, len, &offp); 1238 if (mp == NULL) { 1239 V_pfsyncstats.pfsyncs_badlen++; 1240 return (-1); 1241 } 1242 tp = (struct pfsync_tdb *)(mp->m_data + offp); 1243 1244 for (i = 0; i < count; i++) 1245 pfsync_update_net_tdb(&tp[i]); 1246 #endif 1247 1248 return (len); 1249 } 1250 1251 #if defined(IPSEC) 1252 /* Update an in-kernel tdb. Silently fail if no tdb is found. */ 1253 static void 1254 pfsync_update_net_tdb(struct pfsync_tdb *pt) 1255 { 1256 struct tdb *tdb; 1257 int s; 1258 1259 /* check for invalid values */ 1260 if (ntohl(pt->spi) <= SPI_RESERVED_MAX || 1261 (pt->dst.sa.sa_family != AF_INET && 1262 pt->dst.sa.sa_family != AF_INET6)) 1263 goto bad; 1264 1265 tdb = gettdb(pt->spi, &pt->dst, pt->sproto); 1266 if (tdb) { 1267 pt->rpl = ntohl(pt->rpl); 1268 pt->cur_bytes = (unsigned long long)be64toh(pt->cur_bytes); 1269 1270 /* Neither replay nor byte counter should ever decrease. */ 1271 if (pt->rpl < tdb->tdb_rpl || 1272 pt->cur_bytes < tdb->tdb_cur_bytes) { 1273 goto bad; 1274 } 1275 1276 tdb->tdb_rpl = pt->rpl; 1277 tdb->tdb_cur_bytes = pt->cur_bytes; 1278 } 1279 return; 1280 1281 bad: 1282 if (V_pf_status.debug >= PF_DEBUG_MISC) 1283 printf("pfsync_insert: PFSYNC_ACT_TDB_UPD: " 1284 "invalid value\n"); 1285 V_pfsyncstats.pfsyncs_badstate++; 1286 return; 1287 } 1288 #endif 1289 1290 1291 static int 1292 pfsync_in_eof(struct pfsync_pkt *pkt, struct mbuf *m, int offset, int count) 1293 { 1294 /* check if we are at the right place in the packet */ 1295 if (offset != m->m_pkthdr.len) 1296 V_pfsyncstats.pfsyncs_badlen++; 1297 1298 /* we're done. free and let the caller return */ 1299 m_freem(m); 1300 return (-1); 1301 } 1302 1303 static int 1304 pfsync_in_error(struct pfsync_pkt *pkt, struct mbuf *m, int offset, int count) 1305 { 1306 V_pfsyncstats.pfsyncs_badact++; 1307 1308 m_freem(m); 1309 return (-1); 1310 } 1311 1312 static int 1313 pfsyncoutput(struct ifnet *ifp, struct mbuf *m, const struct sockaddr *dst, 1314 struct route *rt) 1315 { 1316 m_freem(m); 1317 return (0); 1318 } 1319 1320 /* ARGSUSED */ 1321 static int 1322 pfsyncioctl(struct ifnet *ifp, u_long cmd, caddr_t data) 1323 { 1324 struct pfsync_softc *sc = ifp->if_softc; 1325 struct ifreq *ifr = (struct ifreq *)data; 1326 struct pfsyncreq pfsyncr; 1327 int error; 1328 int c; 1329 1330 switch (cmd) { 1331 case SIOCSIFFLAGS: 1332 PFSYNC_LOCK(sc); 1333 if (ifp->if_flags & IFF_UP) { 1334 ifp->if_drv_flags |= IFF_DRV_RUNNING; 1335 PFSYNC_UNLOCK(sc); 1336 pfsync_pointers_init(); 1337 } else { 1338 ifp->if_drv_flags &= ~IFF_DRV_RUNNING; 1339 PFSYNC_UNLOCK(sc); 1340 pfsync_pointers_uninit(); 1341 } 1342 break; 1343 case SIOCSIFMTU: 1344 if (!sc->sc_sync_if || 1345 ifr->ifr_mtu <= PFSYNC_MINPKT || 1346 ifr->ifr_mtu > sc->sc_sync_if->if_mtu) 1347 return (EINVAL); 1348 if (ifr->ifr_mtu < ifp->if_mtu) { 1349 for (c = 0; c < pfsync_buckets; c++) { 1350 PFSYNC_BUCKET_LOCK(&sc->sc_buckets[c]); 1351 if (sc->sc_buckets[c].b_len > PFSYNC_MINPKT) 1352 pfsync_sendout(1, c); 1353 PFSYNC_BUCKET_UNLOCK(&sc->sc_buckets[c]); 1354 } 1355 } 1356 ifp->if_mtu = ifr->ifr_mtu; 1357 break; 1358 case SIOCGETPFSYNC: 1359 bzero(&pfsyncr, sizeof(pfsyncr)); 1360 PFSYNC_LOCK(sc); 1361 if (sc->sc_sync_if) { 1362 strlcpy(pfsyncr.pfsyncr_syncdev, 1363 sc->sc_sync_if->if_xname, IFNAMSIZ); 1364 } 1365 pfsyncr.pfsyncr_syncpeer = sc->sc_sync_peer; 1366 pfsyncr.pfsyncr_maxupdates = sc->sc_maxupdates; 1367 pfsyncr.pfsyncr_defer = (PFSYNCF_DEFER == 1368 (sc->sc_flags & PFSYNCF_DEFER)); 1369 PFSYNC_UNLOCK(sc); 1370 return (copyout(&pfsyncr, ifr_data_get_ptr(ifr), 1371 sizeof(pfsyncr))); 1372 1373 case SIOCSETPFSYNC: 1374 { 1375 struct in_mfilter *imf = NULL; 1376 struct ifnet *sifp; 1377 struct ip *ip; 1378 1379 if ((error = priv_check(curthread, PRIV_NETINET_PF)) != 0) 1380 return (error); 1381 if ((error = copyin(ifr_data_get_ptr(ifr), &pfsyncr, 1382 sizeof(pfsyncr)))) 1383 return (error); 1384 1385 if (pfsyncr.pfsyncr_maxupdates > 255) 1386 return (EINVAL); 1387 1388 if (pfsyncr.pfsyncr_syncdev[0] == 0) 1389 sifp = NULL; 1390 else if ((sifp = ifunit_ref(pfsyncr.pfsyncr_syncdev)) == NULL) 1391 return (EINVAL); 1392 1393 if (sifp != NULL && ( 1394 pfsyncr.pfsyncr_syncpeer.s_addr == 0 || 1395 pfsyncr.pfsyncr_syncpeer.s_addr == 1396 htonl(INADDR_PFSYNC_GROUP))) 1397 imf = ip_mfilter_alloc(M_WAITOK, 0, 0); 1398 1399 PFSYNC_LOCK(sc); 1400 if (pfsyncr.pfsyncr_syncpeer.s_addr == 0) 1401 sc->sc_sync_peer.s_addr = htonl(INADDR_PFSYNC_GROUP); 1402 else 1403 sc->sc_sync_peer.s_addr = 1404 pfsyncr.pfsyncr_syncpeer.s_addr; 1405 1406 sc->sc_maxupdates = pfsyncr.pfsyncr_maxupdates; 1407 if (pfsyncr.pfsyncr_defer) { 1408 sc->sc_flags |= PFSYNCF_DEFER; 1409 V_pfsync_defer_ptr = pfsync_defer; 1410 } else { 1411 sc->sc_flags &= ~PFSYNCF_DEFER; 1412 V_pfsync_defer_ptr = NULL; 1413 } 1414 1415 if (sifp == NULL) { 1416 if (sc->sc_sync_if) 1417 if_rele(sc->sc_sync_if); 1418 sc->sc_sync_if = NULL; 1419 pfsync_multicast_cleanup(sc); 1420 PFSYNC_UNLOCK(sc); 1421 break; 1422 } 1423 1424 for (c = 0; c < pfsync_buckets; c++) { 1425 PFSYNC_BUCKET_LOCK(&sc->sc_buckets[c]); 1426 if (sc->sc_buckets[c].b_len > PFSYNC_MINPKT && 1427 (sifp->if_mtu < sc->sc_ifp->if_mtu || 1428 (sc->sc_sync_if != NULL && 1429 sifp->if_mtu < sc->sc_sync_if->if_mtu) || 1430 sifp->if_mtu < MCLBYTES - sizeof(struct ip))) 1431 pfsync_sendout(1, c); 1432 PFSYNC_BUCKET_UNLOCK(&sc->sc_buckets[c]); 1433 } 1434 1435 pfsync_multicast_cleanup(sc); 1436 1437 if (sc->sc_sync_peer.s_addr == htonl(INADDR_PFSYNC_GROUP)) { 1438 error = pfsync_multicast_setup(sc, sifp, imf); 1439 if (error) { 1440 if_rele(sifp); 1441 ip_mfilter_free(imf); 1442 PFSYNC_UNLOCK(sc); 1443 return (error); 1444 } 1445 } 1446 if (sc->sc_sync_if) 1447 if_rele(sc->sc_sync_if); 1448 sc->sc_sync_if = sifp; 1449 1450 ip = &sc->sc_template; 1451 bzero(ip, sizeof(*ip)); 1452 ip->ip_v = IPVERSION; 1453 ip->ip_hl = sizeof(sc->sc_template) >> 2; 1454 ip->ip_tos = IPTOS_LOWDELAY; 1455 /* len and id are set later. */ 1456 ip->ip_off = htons(IP_DF); 1457 ip->ip_ttl = PFSYNC_DFLTTL; 1458 ip->ip_p = IPPROTO_PFSYNC; 1459 ip->ip_src.s_addr = INADDR_ANY; 1460 ip->ip_dst.s_addr = sc->sc_sync_peer.s_addr; 1461 1462 /* Request a full state table update. */ 1463 if ((sc->sc_flags & PFSYNCF_OK) && carp_demote_adj_p) 1464 (*carp_demote_adj_p)(V_pfsync_carp_adj, 1465 "pfsync bulk start"); 1466 sc->sc_flags &= ~PFSYNCF_OK; 1467 if (V_pf_status.debug >= PF_DEBUG_MISC) 1468 printf("pfsync: requesting bulk update\n"); 1469 PFSYNC_UNLOCK(sc); 1470 PFSYNC_BUCKET_LOCK(&sc->sc_buckets[0]); 1471 pfsync_request_update(0, 0); 1472 PFSYNC_BUCKET_UNLOCK(&sc->sc_buckets[0]); 1473 PFSYNC_BLOCK(sc); 1474 sc->sc_ureq_sent = time_uptime; 1475 callout_reset(&sc->sc_bulkfail_tmo, 5 * hz, pfsync_bulk_fail, 1476 sc); 1477 PFSYNC_BUNLOCK(sc); 1478 1479 break; 1480 } 1481 default: 1482 return (ENOTTY); 1483 } 1484 1485 return (0); 1486 } 1487 1488 static void 1489 pfsync_out_state(struct pf_state *st, void *buf) 1490 { 1491 struct pfsync_state *sp = buf; 1492 1493 pfsync_state_export(sp, st); 1494 } 1495 1496 static void 1497 pfsync_out_iack(struct pf_state *st, void *buf) 1498 { 1499 struct pfsync_ins_ack *iack = buf; 1500 1501 iack->id = st->id; 1502 iack->creatorid = st->creatorid; 1503 } 1504 1505 static void 1506 pfsync_out_upd_c(struct pf_state *st, void *buf) 1507 { 1508 struct pfsync_upd_c *up = buf; 1509 1510 bzero(up, sizeof(*up)); 1511 up->id = st->id; 1512 pf_state_peer_hton(&st->src, &up->src); 1513 pf_state_peer_hton(&st->dst, &up->dst); 1514 up->creatorid = st->creatorid; 1515 up->timeout = st->timeout; 1516 } 1517 1518 static void 1519 pfsync_out_del(struct pf_state *st, void *buf) 1520 { 1521 struct pfsync_del_c *dp = buf; 1522 1523 dp->id = st->id; 1524 dp->creatorid = st->creatorid; 1525 st->state_flags |= PFSTATE_NOSYNC; 1526 } 1527 1528 static void 1529 pfsync_drop(struct pfsync_softc *sc) 1530 { 1531 struct pf_state *st, *next; 1532 struct pfsync_upd_req_item *ur; 1533 struct pfsync_bucket *b; 1534 int c, q; 1535 1536 for (c = 0; c < pfsync_buckets; c++) { 1537 b = &sc->sc_buckets[c]; 1538 for (q = 0; q < PFSYNC_S_COUNT; q++) { 1539 if (TAILQ_EMPTY(&b->b_qs[q])) 1540 continue; 1541 1542 TAILQ_FOREACH_SAFE(st, &b->b_qs[q], sync_list, next) { 1543 KASSERT(st->sync_state == q, 1544 ("%s: st->sync_state == q", 1545 __func__)); 1546 st->sync_state = PFSYNC_S_NONE; 1547 pf_release_state(st); 1548 } 1549 TAILQ_INIT(&b->b_qs[q]); 1550 } 1551 1552 while ((ur = TAILQ_FIRST(&b->b_upd_req_list)) != NULL) { 1553 TAILQ_REMOVE(&b->b_upd_req_list, ur, ur_entry); 1554 free(ur, M_PFSYNC); 1555 } 1556 1557 b->b_len = PFSYNC_MINPKT; 1558 b->b_plus = NULL; 1559 } 1560 } 1561 1562 static void 1563 pfsync_sendout(int schedswi, int c) 1564 { 1565 struct pfsync_softc *sc = V_pfsyncif; 1566 struct ifnet *ifp = sc->sc_ifp; 1567 struct mbuf *m; 1568 struct ip *ip; 1569 struct pfsync_header *ph; 1570 struct pfsync_subheader *subh; 1571 struct pf_state *st, *st_next; 1572 struct pfsync_upd_req_item *ur; 1573 struct pfsync_bucket *b = &sc->sc_buckets[c]; 1574 int offset; 1575 int q, count = 0; 1576 1577 KASSERT(sc != NULL, ("%s: null sc", __func__)); 1578 KASSERT(b->b_len > PFSYNC_MINPKT, 1579 ("%s: sc_len %zu", __func__, b->b_len)); 1580 PFSYNC_BUCKET_LOCK_ASSERT(b); 1581 1582 if (ifp->if_bpf == NULL && sc->sc_sync_if == NULL) { 1583 pfsync_drop(sc); 1584 return; 1585 } 1586 1587 m = m_get2(max_linkhdr + b->b_len, M_NOWAIT, MT_DATA, M_PKTHDR); 1588 if (m == NULL) { 1589 if_inc_counter(sc->sc_ifp, IFCOUNTER_OERRORS, 1); 1590 V_pfsyncstats.pfsyncs_onomem++; 1591 return; 1592 } 1593 m->m_data += max_linkhdr; 1594 m->m_len = m->m_pkthdr.len = b->b_len; 1595 1596 /* build the ip header */ 1597 ip = (struct ip *)m->m_data; 1598 bcopy(&sc->sc_template, ip, sizeof(*ip)); 1599 offset = sizeof(*ip); 1600 1601 ip->ip_len = htons(m->m_pkthdr.len); 1602 ip_fillid(ip); 1603 1604 /* build the pfsync header */ 1605 ph = (struct pfsync_header *)(m->m_data + offset); 1606 bzero(ph, sizeof(*ph)); 1607 offset += sizeof(*ph); 1608 1609 ph->version = PFSYNC_VERSION; 1610 ph->len = htons(b->b_len - sizeof(*ip)); 1611 bcopy(V_pf_status.pf_chksum, ph->pfcksum, PF_MD5_DIGEST_LENGTH); 1612 1613 /* walk the queues */ 1614 for (q = 0; q < PFSYNC_S_COUNT; q++) { 1615 if (TAILQ_EMPTY(&b->b_qs[q])) 1616 continue; 1617 1618 subh = (struct pfsync_subheader *)(m->m_data + offset); 1619 offset += sizeof(*subh); 1620 1621 count = 0; 1622 TAILQ_FOREACH_SAFE(st, &b->b_qs[q], sync_list, st_next) { 1623 KASSERT(st->sync_state == q, 1624 ("%s: st->sync_state == q", 1625 __func__)); 1626 /* 1627 * XXXGL: some of write methods do unlocked reads 1628 * of state data :( 1629 */ 1630 pfsync_qs[q].write(st, m->m_data + offset); 1631 offset += pfsync_qs[q].len; 1632 st->sync_state = PFSYNC_S_NONE; 1633 pf_release_state(st); 1634 count++; 1635 } 1636 TAILQ_INIT(&b->b_qs[q]); 1637 1638 bzero(subh, sizeof(*subh)); 1639 subh->action = pfsync_qs[q].action; 1640 subh->count = htons(count); 1641 V_pfsyncstats.pfsyncs_oacts[pfsync_qs[q].action] += count; 1642 } 1643 1644 if (!TAILQ_EMPTY(&b->b_upd_req_list)) { 1645 subh = (struct pfsync_subheader *)(m->m_data + offset); 1646 offset += sizeof(*subh); 1647 1648 count = 0; 1649 while ((ur = TAILQ_FIRST(&b->b_upd_req_list)) != NULL) { 1650 TAILQ_REMOVE(&b->b_upd_req_list, ur, ur_entry); 1651 1652 bcopy(&ur->ur_msg, m->m_data + offset, 1653 sizeof(ur->ur_msg)); 1654 offset += sizeof(ur->ur_msg); 1655 free(ur, M_PFSYNC); 1656 count++; 1657 } 1658 1659 bzero(subh, sizeof(*subh)); 1660 subh->action = PFSYNC_ACT_UPD_REQ; 1661 subh->count = htons(count); 1662 V_pfsyncstats.pfsyncs_oacts[PFSYNC_ACT_UPD_REQ] += count; 1663 } 1664 1665 /* has someone built a custom region for us to add? */ 1666 if (b->b_plus != NULL) { 1667 bcopy(b->b_plus, m->m_data + offset, b->b_pluslen); 1668 offset += b->b_pluslen; 1669 1670 b->b_plus = NULL; 1671 } 1672 1673 subh = (struct pfsync_subheader *)(m->m_data + offset); 1674 offset += sizeof(*subh); 1675 1676 bzero(subh, sizeof(*subh)); 1677 subh->action = PFSYNC_ACT_EOF; 1678 subh->count = htons(1); 1679 V_pfsyncstats.pfsyncs_oacts[PFSYNC_ACT_EOF]++; 1680 1681 /* we're done, let's put it on the wire */ 1682 if (ifp->if_bpf) { 1683 m->m_data += sizeof(*ip); 1684 m->m_len = m->m_pkthdr.len = b->b_len - sizeof(*ip); 1685 BPF_MTAP(ifp, m); 1686 m->m_data -= sizeof(*ip); 1687 m->m_len = m->m_pkthdr.len = b->b_len; 1688 } 1689 1690 if (sc->sc_sync_if == NULL) { 1691 b->b_len = PFSYNC_MINPKT; 1692 m_freem(m); 1693 return; 1694 } 1695 1696 if_inc_counter(sc->sc_ifp, IFCOUNTER_OPACKETS, 1); 1697 if_inc_counter(sc->sc_ifp, IFCOUNTER_OBYTES, m->m_pkthdr.len); 1698 b->b_len = PFSYNC_MINPKT; 1699 1700 if (!_IF_QFULL(&b->b_snd)) 1701 _IF_ENQUEUE(&b->b_snd, m); 1702 else { 1703 m_freem(m); 1704 if_inc_counter(sc->sc_ifp, IFCOUNTER_OQDROPS, 1); 1705 } 1706 if (schedswi) 1707 swi_sched(V_pfsync_swi_cookie, 0); 1708 } 1709 1710 static void 1711 pfsync_insert_state(struct pf_state *st) 1712 { 1713 struct pfsync_softc *sc = V_pfsyncif; 1714 struct pfsync_bucket *b = pfsync_get_bucket(sc, st); 1715 1716 if (st->state_flags & PFSTATE_NOSYNC) 1717 return; 1718 1719 if ((st->rule.ptr->rule_flag & PFRULE_NOSYNC) || 1720 st->key[PF_SK_WIRE]->proto == IPPROTO_PFSYNC) { 1721 st->state_flags |= PFSTATE_NOSYNC; 1722 return; 1723 } 1724 1725 KASSERT(st->sync_state == PFSYNC_S_NONE, 1726 ("%s: st->sync_state %u", __func__, st->sync_state)); 1727 1728 PFSYNC_BUCKET_LOCK(b); 1729 if (b->b_len == PFSYNC_MINPKT) 1730 callout_reset(&b->b_tmo, 1 * hz, pfsync_timeout, b); 1731 1732 pfsync_q_ins(st, PFSYNC_S_INS, true); 1733 PFSYNC_BUCKET_UNLOCK(b); 1734 1735 st->sync_updates = 0; 1736 } 1737 1738 static int 1739 pfsync_defer(struct pf_state *st, struct mbuf *m) 1740 { 1741 struct pfsync_softc *sc = V_pfsyncif; 1742 struct pfsync_deferral *pd; 1743 struct pfsync_bucket *b = pfsync_get_bucket(sc, st); 1744 1745 if (m->m_flags & (M_BCAST|M_MCAST)) 1746 return (0); 1747 1748 PFSYNC_LOCK(sc); 1749 1750 if (sc == NULL || !(sc->sc_ifp->if_flags & IFF_DRV_RUNNING) || 1751 !(sc->sc_flags & PFSYNCF_DEFER)) { 1752 PFSYNC_UNLOCK(sc); 1753 return (0); 1754 } 1755 1756 if (b->b_deferred >= 128) 1757 pfsync_undefer(TAILQ_FIRST(&b->b_deferrals), 0); 1758 1759 pd = malloc(sizeof(*pd), M_PFSYNC, M_NOWAIT); 1760 if (pd == NULL) 1761 return (0); 1762 b->b_deferred++; 1763 1764 m->m_flags |= M_SKIP_FIREWALL; 1765 st->state_flags |= PFSTATE_ACK; 1766 1767 pd->pd_sc = sc; 1768 pd->pd_refs = 0; 1769 pd->pd_st = st; 1770 pf_ref_state(st); 1771 pd->pd_m = m; 1772 1773 TAILQ_INSERT_TAIL(&b->b_deferrals, pd, pd_entry); 1774 callout_init_mtx(&pd->pd_tmo, &b->b_mtx, CALLOUT_RETURNUNLOCKED); 1775 callout_reset(&pd->pd_tmo, 10, pfsync_defer_tmo, pd); 1776 1777 pfsync_push(b); 1778 1779 return (1); 1780 } 1781 1782 static void 1783 pfsync_undefer(struct pfsync_deferral *pd, int drop) 1784 { 1785 struct pfsync_softc *sc = pd->pd_sc; 1786 struct mbuf *m = pd->pd_m; 1787 struct pf_state *st = pd->pd_st; 1788 struct pfsync_bucket *b = pfsync_get_bucket(sc, st); 1789 1790 PFSYNC_BUCKET_LOCK_ASSERT(b); 1791 1792 TAILQ_REMOVE(&b->b_deferrals, pd, pd_entry); 1793 b->b_deferred--; 1794 pd->pd_st->state_flags &= ~PFSTATE_ACK; /* XXX: locking! */ 1795 free(pd, M_PFSYNC); 1796 pf_release_state(st); 1797 1798 if (drop) 1799 m_freem(m); 1800 else { 1801 _IF_ENQUEUE(&b->b_snd, m); 1802 pfsync_push(b); 1803 } 1804 } 1805 1806 static void 1807 pfsync_defer_tmo(void *arg) 1808 { 1809 struct pfsync_deferral *pd = arg; 1810 struct pfsync_softc *sc = pd->pd_sc; 1811 struct mbuf *m = pd->pd_m; 1812 struct pf_state *st = pd->pd_st; 1813 struct pfsync_bucket *b = pfsync_get_bucket(sc, st); 1814 1815 PFSYNC_BUCKET_LOCK_ASSERT(b); 1816 1817 CURVNET_SET(m->m_pkthdr.rcvif->if_vnet); 1818 1819 TAILQ_REMOVE(&b->b_deferrals, pd, pd_entry); 1820 b->b_deferred--; 1821 pd->pd_st->state_flags &= ~PFSTATE_ACK; /* XXX: locking! */ 1822 if (pd->pd_refs == 0) 1823 free(pd, M_PFSYNC); 1824 PFSYNC_UNLOCK(sc); 1825 1826 ip_output(m, NULL, NULL, 0, NULL, NULL); 1827 1828 pf_release_state(st); 1829 1830 CURVNET_RESTORE(); 1831 } 1832 1833 static void 1834 pfsync_undefer_state(struct pf_state *st, int drop) 1835 { 1836 struct pfsync_softc *sc = V_pfsyncif; 1837 struct pfsync_deferral *pd; 1838 struct pfsync_bucket *b = pfsync_get_bucket(sc, st); 1839 1840 PFSYNC_BUCKET_LOCK(b); 1841 1842 TAILQ_FOREACH(pd, &b->b_deferrals, pd_entry) { 1843 if (pd->pd_st == st) { 1844 if (callout_stop(&pd->pd_tmo) > 0) 1845 pfsync_undefer(pd, drop); 1846 1847 PFSYNC_BUCKET_UNLOCK(b); 1848 return; 1849 } 1850 } 1851 PFSYNC_BUCKET_UNLOCK(b); 1852 1853 panic("%s: unable to find deferred state", __func__); 1854 } 1855 1856 static struct pfsync_bucket* 1857 pfsync_get_bucket(struct pfsync_softc *sc, struct pf_state *st) 1858 { 1859 int c = PF_IDHASH(st) % pfsync_buckets; 1860 return &sc->sc_buckets[c]; 1861 } 1862 1863 static void 1864 pfsync_update_state(struct pf_state *st) 1865 { 1866 struct pfsync_softc *sc = V_pfsyncif; 1867 bool sync = false, ref = true; 1868 struct pfsync_bucket *b = pfsync_get_bucket(sc, st); 1869 1870 PF_STATE_LOCK_ASSERT(st); 1871 PFSYNC_BUCKET_LOCK(b); 1872 1873 if (st->state_flags & PFSTATE_ACK) 1874 pfsync_undefer_state(st, 0); 1875 if (st->state_flags & PFSTATE_NOSYNC) { 1876 if (st->sync_state != PFSYNC_S_NONE) 1877 pfsync_q_del(st, true, b); 1878 PFSYNC_BUCKET_UNLOCK(b); 1879 return; 1880 } 1881 1882 if (b->b_len == PFSYNC_MINPKT) 1883 callout_reset(&b->b_tmo, 1 * hz, pfsync_timeout, b); 1884 1885 switch (st->sync_state) { 1886 case PFSYNC_S_UPD_C: 1887 case PFSYNC_S_UPD: 1888 case PFSYNC_S_INS: 1889 /* we're already handling it */ 1890 1891 if (st->key[PF_SK_WIRE]->proto == IPPROTO_TCP) { 1892 st->sync_updates++; 1893 if (st->sync_updates >= sc->sc_maxupdates) 1894 sync = true; 1895 } 1896 break; 1897 1898 case PFSYNC_S_IACK: 1899 pfsync_q_del(st, false, b); 1900 ref = false; 1901 /* FALLTHROUGH */ 1902 1903 case PFSYNC_S_NONE: 1904 pfsync_q_ins(st, PFSYNC_S_UPD_C, ref); 1905 st->sync_updates = 0; 1906 break; 1907 1908 default: 1909 panic("%s: unexpected sync state %d", __func__, st->sync_state); 1910 } 1911 1912 if (sync || (time_uptime - st->pfsync_time) < 2) 1913 pfsync_push(b); 1914 1915 PFSYNC_BUCKET_UNLOCK(b); 1916 } 1917 1918 static void 1919 pfsync_request_update(u_int32_t creatorid, u_int64_t id) 1920 { 1921 struct pfsync_softc *sc = V_pfsyncif; 1922 struct pfsync_bucket *b = &sc->sc_buckets[0]; 1923 struct pfsync_upd_req_item *item; 1924 size_t nlen = sizeof(struct pfsync_upd_req); 1925 1926 PFSYNC_BUCKET_LOCK_ASSERT(b); 1927 1928 /* 1929 * This code does a bit to prevent multiple update requests for the 1930 * same state being generated. It searches current subheader queue, 1931 * but it doesn't lookup into queue of already packed datagrams. 1932 */ 1933 TAILQ_FOREACH(item, &b->b_upd_req_list, ur_entry) 1934 if (item->ur_msg.id == id && 1935 item->ur_msg.creatorid == creatorid) 1936 return; 1937 1938 item = malloc(sizeof(*item), M_PFSYNC, M_NOWAIT); 1939 if (item == NULL) 1940 return; /* XXX stats */ 1941 1942 item->ur_msg.id = id; 1943 item->ur_msg.creatorid = creatorid; 1944 1945 if (TAILQ_EMPTY(&b->b_upd_req_list)) 1946 nlen += sizeof(struct pfsync_subheader); 1947 1948 if (b->b_len + nlen > sc->sc_ifp->if_mtu) { 1949 pfsync_sendout(1, 0); 1950 1951 nlen = sizeof(struct pfsync_subheader) + 1952 sizeof(struct pfsync_upd_req); 1953 } 1954 1955 TAILQ_INSERT_TAIL(&b->b_upd_req_list, item, ur_entry); 1956 b->b_len += nlen; 1957 } 1958 1959 static bool 1960 pfsync_update_state_req(struct pf_state *st) 1961 { 1962 struct pfsync_softc *sc = V_pfsyncif; 1963 bool ref = true, full = false; 1964 struct pfsync_bucket *b = pfsync_get_bucket(sc, st); 1965 1966 PF_STATE_LOCK_ASSERT(st); 1967 PFSYNC_BUCKET_LOCK(b); 1968 1969 if (st->state_flags & PFSTATE_NOSYNC) { 1970 if (st->sync_state != PFSYNC_S_NONE) 1971 pfsync_q_del(st, true, b); 1972 PFSYNC_BUCKET_UNLOCK(b); 1973 return (full); 1974 } 1975 1976 switch (st->sync_state) { 1977 case PFSYNC_S_UPD_C: 1978 case PFSYNC_S_IACK: 1979 pfsync_q_del(st, false, b); 1980 ref = false; 1981 /* FALLTHROUGH */ 1982 1983 case PFSYNC_S_NONE: 1984 pfsync_q_ins(st, PFSYNC_S_UPD, ref); 1985 pfsync_push(b); 1986 break; 1987 1988 case PFSYNC_S_INS: 1989 case PFSYNC_S_UPD: 1990 case PFSYNC_S_DEL: 1991 /* we're already handling it */ 1992 break; 1993 1994 default: 1995 panic("%s: unexpected sync state %d", __func__, st->sync_state); 1996 } 1997 1998 if ((sc->sc_ifp->if_mtu - b->b_len) < sizeof(struct pfsync_state)) 1999 full = true; 2000 2001 PFSYNC_BUCKET_UNLOCK(b); 2002 2003 return (full); 2004 } 2005 2006 static void 2007 pfsync_delete_state(struct pf_state *st) 2008 { 2009 struct pfsync_softc *sc = V_pfsyncif; 2010 struct pfsync_bucket *b = pfsync_get_bucket(sc, st); 2011 bool ref = true; 2012 2013 PFSYNC_BUCKET_LOCK(b); 2014 if (st->state_flags & PFSTATE_ACK) 2015 pfsync_undefer_state(st, 1); 2016 if (st->state_flags & PFSTATE_NOSYNC) { 2017 if (st->sync_state != PFSYNC_S_NONE) 2018 pfsync_q_del(st, true, b); 2019 PFSYNC_BUCKET_UNLOCK(b); 2020 return; 2021 } 2022 2023 if (b->b_len == PFSYNC_MINPKT) 2024 callout_reset(&b->b_tmo, 1 * hz, pfsync_timeout, b); 2025 2026 switch (st->sync_state) { 2027 case PFSYNC_S_INS: 2028 /* We never got to tell the world so just forget about it. */ 2029 pfsync_q_del(st, true, b); 2030 break; 2031 2032 case PFSYNC_S_UPD_C: 2033 case PFSYNC_S_UPD: 2034 case PFSYNC_S_IACK: 2035 pfsync_q_del(st, false, b); 2036 ref = false; 2037 /* FALLTHROUGH */ 2038 2039 case PFSYNC_S_NONE: 2040 pfsync_q_ins(st, PFSYNC_S_DEL, ref); 2041 break; 2042 2043 default: 2044 panic("%s: unexpected sync state %d", __func__, st->sync_state); 2045 } 2046 2047 PFSYNC_BUCKET_UNLOCK(b); 2048 } 2049 2050 static void 2051 pfsync_clear_states(u_int32_t creatorid, const char *ifname) 2052 { 2053 struct { 2054 struct pfsync_subheader subh; 2055 struct pfsync_clr clr; 2056 } __packed r; 2057 2058 bzero(&r, sizeof(r)); 2059 2060 r.subh.action = PFSYNC_ACT_CLR; 2061 r.subh.count = htons(1); 2062 V_pfsyncstats.pfsyncs_oacts[PFSYNC_ACT_CLR]++; 2063 2064 strlcpy(r.clr.ifname, ifname, sizeof(r.clr.ifname)); 2065 r.clr.creatorid = creatorid; 2066 2067 pfsync_send_plus(&r, sizeof(r)); 2068 } 2069 2070 static void 2071 pfsync_q_ins(struct pf_state *st, int q, bool ref) 2072 { 2073 struct pfsync_softc *sc = V_pfsyncif; 2074 size_t nlen = pfsync_qs[q].len; 2075 struct pfsync_bucket *b = pfsync_get_bucket(sc, st); 2076 2077 PFSYNC_BUCKET_LOCK_ASSERT(b); 2078 2079 KASSERT(st->sync_state == PFSYNC_S_NONE, 2080 ("%s: st->sync_state %u", __func__, st->sync_state)); 2081 KASSERT(b->b_len >= PFSYNC_MINPKT, ("pfsync pkt len is too low %zu", 2082 b->b_len)); 2083 2084 if (TAILQ_EMPTY(&b->b_qs[q])) 2085 nlen += sizeof(struct pfsync_subheader); 2086 2087 if (b->b_len + nlen > sc->sc_ifp->if_mtu) { 2088 pfsync_sendout(1, b->b_id); 2089 2090 nlen = sizeof(struct pfsync_subheader) + pfsync_qs[q].len; 2091 } 2092 2093 b->b_len += nlen; 2094 TAILQ_INSERT_TAIL(&b->b_qs[q], st, sync_list); 2095 st->sync_state = q; 2096 if (ref) 2097 pf_ref_state(st); 2098 } 2099 2100 static void 2101 pfsync_q_del(struct pf_state *st, bool unref, struct pfsync_bucket *b) 2102 { 2103 int q = st->sync_state; 2104 2105 PFSYNC_BUCKET_LOCK_ASSERT(b); 2106 KASSERT(st->sync_state != PFSYNC_S_NONE, 2107 ("%s: st->sync_state != PFSYNC_S_NONE", __func__)); 2108 2109 b->b_len -= pfsync_qs[q].len; 2110 TAILQ_REMOVE(&b->b_qs[q], st, sync_list); 2111 st->sync_state = PFSYNC_S_NONE; 2112 if (unref) 2113 pf_release_state(st); 2114 2115 if (TAILQ_EMPTY(&b->b_qs[q])) 2116 b->b_len -= sizeof(struct pfsync_subheader); 2117 } 2118 2119 static void 2120 pfsync_bulk_start(void) 2121 { 2122 struct pfsync_softc *sc = V_pfsyncif; 2123 2124 if (V_pf_status.debug >= PF_DEBUG_MISC) 2125 printf("pfsync: received bulk update request\n"); 2126 2127 PFSYNC_BLOCK(sc); 2128 2129 sc->sc_ureq_received = time_uptime; 2130 sc->sc_bulk_hashid = 0; 2131 sc->sc_bulk_stateid = 0; 2132 pfsync_bulk_status(PFSYNC_BUS_START); 2133 callout_reset(&sc->sc_bulk_tmo, 1, pfsync_bulk_update, sc); 2134 PFSYNC_BUNLOCK(sc); 2135 } 2136 2137 static void 2138 pfsync_bulk_update(void *arg) 2139 { 2140 struct pfsync_softc *sc = arg; 2141 struct pf_state *s; 2142 int i, sent = 0; 2143 2144 PFSYNC_BLOCK_ASSERT(sc); 2145 CURVNET_SET(sc->sc_ifp->if_vnet); 2146 2147 /* 2148 * Start with last state from previous invocation. 2149 * It may had gone, in this case start from the 2150 * hash slot. 2151 */ 2152 s = pf_find_state_byid(sc->sc_bulk_stateid, sc->sc_bulk_creatorid); 2153 2154 if (s != NULL) 2155 i = PF_IDHASH(s); 2156 else 2157 i = sc->sc_bulk_hashid; 2158 2159 for (; i <= pf_hashmask; i++) { 2160 struct pf_idhash *ih = &V_pf_idhash[i]; 2161 2162 if (s != NULL) 2163 PF_HASHROW_ASSERT(ih); 2164 else { 2165 PF_HASHROW_LOCK(ih); 2166 s = LIST_FIRST(&ih->states); 2167 } 2168 2169 for (; s; s = LIST_NEXT(s, entry)) { 2170 if (s->sync_state == PFSYNC_S_NONE && 2171 s->timeout < PFTM_MAX && 2172 s->pfsync_time <= sc->sc_ureq_received) { 2173 if (pfsync_update_state_req(s)) { 2174 /* We've filled a packet. */ 2175 sc->sc_bulk_hashid = i; 2176 sc->sc_bulk_stateid = s->id; 2177 sc->sc_bulk_creatorid = s->creatorid; 2178 PF_HASHROW_UNLOCK(ih); 2179 callout_reset(&sc->sc_bulk_tmo, 1, 2180 pfsync_bulk_update, sc); 2181 goto full; 2182 } 2183 sent++; 2184 } 2185 } 2186 PF_HASHROW_UNLOCK(ih); 2187 } 2188 2189 /* We're done. */ 2190 pfsync_bulk_status(PFSYNC_BUS_END); 2191 full: 2192 CURVNET_RESTORE(); 2193 } 2194 2195 static void 2196 pfsync_bulk_status(u_int8_t status) 2197 { 2198 struct { 2199 struct pfsync_subheader subh; 2200 struct pfsync_bus bus; 2201 } __packed r; 2202 2203 struct pfsync_softc *sc = V_pfsyncif; 2204 2205 bzero(&r, sizeof(r)); 2206 2207 r.subh.action = PFSYNC_ACT_BUS; 2208 r.subh.count = htons(1); 2209 V_pfsyncstats.pfsyncs_oacts[PFSYNC_ACT_BUS]++; 2210 2211 r.bus.creatorid = V_pf_status.hostid; 2212 r.bus.endtime = htonl(time_uptime - sc->sc_ureq_received); 2213 r.bus.status = status; 2214 2215 pfsync_send_plus(&r, sizeof(r)); 2216 } 2217 2218 static void 2219 pfsync_bulk_fail(void *arg) 2220 { 2221 struct pfsync_softc *sc = arg; 2222 struct pfsync_bucket *b = &sc->sc_buckets[0]; 2223 2224 CURVNET_SET(sc->sc_ifp->if_vnet); 2225 2226 PFSYNC_BLOCK_ASSERT(sc); 2227 2228 if (sc->sc_bulk_tries++ < PFSYNC_MAX_BULKTRIES) { 2229 /* Try again */ 2230 callout_reset(&sc->sc_bulkfail_tmo, 5 * hz, 2231 pfsync_bulk_fail, V_pfsyncif); 2232 PFSYNC_BUCKET_LOCK(b); 2233 pfsync_request_update(0, 0); 2234 PFSYNC_BUCKET_UNLOCK(b); 2235 } else { 2236 /* Pretend like the transfer was ok. */ 2237 sc->sc_ureq_sent = 0; 2238 sc->sc_bulk_tries = 0; 2239 PFSYNC_LOCK(sc); 2240 if (!(sc->sc_flags & PFSYNCF_OK) && carp_demote_adj_p) 2241 (*carp_demote_adj_p)(-V_pfsync_carp_adj, 2242 "pfsync bulk fail"); 2243 sc->sc_flags |= PFSYNCF_OK; 2244 PFSYNC_UNLOCK(sc); 2245 if (V_pf_status.debug >= PF_DEBUG_MISC) 2246 printf("pfsync: failed to receive bulk update\n"); 2247 } 2248 2249 CURVNET_RESTORE(); 2250 } 2251 2252 static void 2253 pfsync_send_plus(void *plus, size_t pluslen) 2254 { 2255 struct pfsync_softc *sc = V_pfsyncif; 2256 struct pfsync_bucket *b = &sc->sc_buckets[0]; 2257 2258 PFSYNC_BUCKET_LOCK(b); 2259 2260 if (b->b_len + pluslen > sc->sc_ifp->if_mtu) 2261 pfsync_sendout(1, b->b_id); 2262 2263 b->b_plus = plus; 2264 b->b_len += (b->b_pluslen = pluslen); 2265 2266 pfsync_sendout(1, b->b_id); 2267 PFSYNC_BUCKET_UNLOCK(b); 2268 } 2269 2270 static void 2271 pfsync_timeout(void *arg) 2272 { 2273 struct pfsync_bucket *b = arg; 2274 2275 CURVNET_SET(b->b_sc->sc_ifp->if_vnet); 2276 PFSYNC_BUCKET_LOCK(b); 2277 pfsync_push(b); 2278 PFSYNC_BUCKET_UNLOCK(b); 2279 CURVNET_RESTORE(); 2280 } 2281 2282 static void 2283 pfsync_push(struct pfsync_bucket *b) 2284 { 2285 2286 PFSYNC_BUCKET_LOCK_ASSERT(b); 2287 2288 b->b_flags |= PFSYNCF_BUCKET_PUSH; 2289 swi_sched(V_pfsync_swi_cookie, 0); 2290 } 2291 2292 static void 2293 pfsync_push_all(struct pfsync_softc *sc) 2294 { 2295 int c; 2296 struct pfsync_bucket *b; 2297 2298 for (c = 0; c < pfsync_buckets; c++) { 2299 b = &sc->sc_buckets[c]; 2300 2301 PFSYNC_BUCKET_LOCK(b); 2302 pfsync_push(b); 2303 PFSYNC_BUCKET_UNLOCK(b); 2304 } 2305 } 2306 2307 static void 2308 pfsyncintr(void *arg) 2309 { 2310 struct pfsync_softc *sc = arg; 2311 struct pfsync_bucket *b; 2312 struct mbuf *m, *n; 2313 int c; 2314 2315 CURVNET_SET(sc->sc_ifp->if_vnet); 2316 2317 for (c = 0; c < pfsync_buckets; c++) { 2318 b = &sc->sc_buckets[c]; 2319 2320 PFSYNC_BUCKET_LOCK(b); 2321 if ((b->b_flags & PFSYNCF_BUCKET_PUSH) && b->b_len > PFSYNC_MINPKT) { 2322 pfsync_sendout(0, b->b_id); 2323 b->b_flags &= ~PFSYNCF_BUCKET_PUSH; 2324 } 2325 _IF_DEQUEUE_ALL(&b->b_snd, m); 2326 PFSYNC_BUCKET_UNLOCK(b); 2327 2328 for (; m != NULL; m = n) { 2329 2330 n = m->m_nextpkt; 2331 m->m_nextpkt = NULL; 2332 2333 /* 2334 * We distinguish between a deferral packet and our 2335 * own pfsync packet based on M_SKIP_FIREWALL 2336 * flag. This is XXX. 2337 */ 2338 if (m->m_flags & M_SKIP_FIREWALL) 2339 ip_output(m, NULL, NULL, 0, NULL, NULL); 2340 else if (ip_output(m, NULL, NULL, IP_RAWOUTPUT, &sc->sc_imo, 2341 NULL) == 0) 2342 V_pfsyncstats.pfsyncs_opackets++; 2343 else 2344 V_pfsyncstats.pfsyncs_oerrors++; 2345 } 2346 } 2347 CURVNET_RESTORE(); 2348 } 2349 2350 static int 2351 pfsync_multicast_setup(struct pfsync_softc *sc, struct ifnet *ifp, 2352 struct in_mfilter *imf) 2353 { 2354 struct ip_moptions *imo = &sc->sc_imo; 2355 int error; 2356 2357 if (!(ifp->if_flags & IFF_MULTICAST)) 2358 return (EADDRNOTAVAIL); 2359 2360 imo->imo_multicast_vif = -1; 2361 2362 if ((error = in_joingroup(ifp, &sc->sc_sync_peer, NULL, 2363 &imf->imf_inm)) != 0) 2364 return (error); 2365 2366 ip_mfilter_init(&imo->imo_head); 2367 ip_mfilter_insert(&imo->imo_head, imf); 2368 imo->imo_multicast_ifp = ifp; 2369 imo->imo_multicast_ttl = PFSYNC_DFLTTL; 2370 imo->imo_multicast_loop = 0; 2371 2372 return (0); 2373 } 2374 2375 static void 2376 pfsync_multicast_cleanup(struct pfsync_softc *sc) 2377 { 2378 struct ip_moptions *imo = &sc->sc_imo; 2379 struct in_mfilter *imf; 2380 2381 while ((imf = ip_mfilter_first(&imo->imo_head)) != NULL) { 2382 ip_mfilter_remove(&imo->imo_head, imf); 2383 in_leavegroup(imf->imf_inm, NULL); 2384 ip_mfilter_free(imf); 2385 } 2386 imo->imo_multicast_ifp = NULL; 2387 } 2388 2389 void 2390 pfsync_detach_ifnet(struct ifnet *ifp) 2391 { 2392 struct pfsync_softc *sc = V_pfsyncif; 2393 2394 if (sc == NULL) 2395 return; 2396 2397 PFSYNC_LOCK(sc); 2398 2399 if (sc->sc_sync_if == ifp) { 2400 /* We don't need mutlicast cleanup here, because the interface 2401 * is going away. We do need to ensure we don't try to do 2402 * cleanup later. 2403 */ 2404 ip_mfilter_init(&sc->sc_imo.imo_head); 2405 sc->sc_imo.imo_multicast_ifp = NULL; 2406 sc->sc_sync_if = NULL; 2407 } 2408 2409 PFSYNC_UNLOCK(sc); 2410 } 2411 2412 #ifdef INET 2413 extern struct domain inetdomain; 2414 static struct protosw in_pfsync_protosw = { 2415 .pr_type = SOCK_RAW, 2416 .pr_domain = &inetdomain, 2417 .pr_protocol = IPPROTO_PFSYNC, 2418 .pr_flags = PR_ATOMIC|PR_ADDR, 2419 .pr_input = pfsync_input, 2420 .pr_output = rip_output, 2421 .pr_ctloutput = rip_ctloutput, 2422 .pr_usrreqs = &rip_usrreqs 2423 }; 2424 #endif 2425 2426 static void 2427 pfsync_pointers_init() 2428 { 2429 2430 PF_RULES_WLOCK(); 2431 V_pfsync_state_import_ptr = pfsync_state_import; 2432 V_pfsync_insert_state_ptr = pfsync_insert_state; 2433 V_pfsync_update_state_ptr = pfsync_update_state; 2434 V_pfsync_delete_state_ptr = pfsync_delete_state; 2435 V_pfsync_clear_states_ptr = pfsync_clear_states; 2436 V_pfsync_defer_ptr = pfsync_defer; 2437 PF_RULES_WUNLOCK(); 2438 } 2439 2440 static void 2441 pfsync_pointers_uninit() 2442 { 2443 2444 PF_RULES_WLOCK(); 2445 V_pfsync_state_import_ptr = NULL; 2446 V_pfsync_insert_state_ptr = NULL; 2447 V_pfsync_update_state_ptr = NULL; 2448 V_pfsync_delete_state_ptr = NULL; 2449 V_pfsync_clear_states_ptr = NULL; 2450 V_pfsync_defer_ptr = NULL; 2451 PF_RULES_WUNLOCK(); 2452 } 2453 2454 static void 2455 vnet_pfsync_init(const void *unused __unused) 2456 { 2457 int error; 2458 2459 V_pfsync_cloner = if_clone_simple(pfsyncname, 2460 pfsync_clone_create, pfsync_clone_destroy, 1); 2461 error = swi_add(NULL, pfsyncname, pfsyncintr, V_pfsyncif, 2462 SWI_NET, INTR_MPSAFE, &V_pfsync_swi_cookie); 2463 if (error) { 2464 if_clone_detach(V_pfsync_cloner); 2465 log(LOG_INFO, "swi_add() failed in %s\n", __func__); 2466 } 2467 2468 pfsync_pointers_init(); 2469 } 2470 VNET_SYSINIT(vnet_pfsync_init, SI_SUB_PROTO_FIREWALL, SI_ORDER_ANY, 2471 vnet_pfsync_init, NULL); 2472 2473 static void 2474 vnet_pfsync_uninit(const void *unused __unused) 2475 { 2476 2477 pfsync_pointers_uninit(); 2478 2479 if_clone_detach(V_pfsync_cloner); 2480 swi_remove(V_pfsync_swi_cookie); 2481 } 2482 2483 VNET_SYSUNINIT(vnet_pfsync_uninit, SI_SUB_PROTO_FIREWALL, SI_ORDER_FOURTH, 2484 vnet_pfsync_uninit, NULL); 2485 2486 static int 2487 pfsync_init() 2488 { 2489 #ifdef INET 2490 int error; 2491 2492 pfsync_detach_ifnet_ptr = pfsync_detach_ifnet; 2493 2494 error = pf_proto_register(PF_INET, &in_pfsync_protosw); 2495 if (error) 2496 return (error); 2497 error = ipproto_register(IPPROTO_PFSYNC); 2498 if (error) { 2499 pf_proto_unregister(PF_INET, IPPROTO_PFSYNC, SOCK_RAW); 2500 return (error); 2501 } 2502 #endif 2503 2504 return (0); 2505 } 2506 2507 static void 2508 pfsync_uninit() 2509 { 2510 pfsync_detach_ifnet_ptr = NULL; 2511 2512 #ifdef INET 2513 ipproto_unregister(IPPROTO_PFSYNC); 2514 pf_proto_unregister(PF_INET, IPPROTO_PFSYNC, SOCK_RAW); 2515 #endif 2516 } 2517 2518 static int 2519 pfsync_modevent(module_t mod, int type, void *data) 2520 { 2521 int error = 0; 2522 2523 switch (type) { 2524 case MOD_LOAD: 2525 error = pfsync_init(); 2526 break; 2527 case MOD_UNLOAD: 2528 pfsync_uninit(); 2529 break; 2530 default: 2531 error = EINVAL; 2532 break; 2533 } 2534 2535 return (error); 2536 } 2537 2538 static moduledata_t pfsync_mod = { 2539 pfsyncname, 2540 pfsync_modevent, 2541 0 2542 }; 2543 2544 #define PFSYNC_MODVER 1 2545 2546 /* Stay on FIREWALL as we depend on pf being initialized and on inetdomain. */ 2547 DECLARE_MODULE(pfsync, pfsync_mod, SI_SUB_PROTO_FIREWALL, SI_ORDER_ANY); 2548 MODULE_VERSION(pfsync, PFSYNC_MODVER); 2549 MODULE_DEPEND(pfsync, pf, PF_MODVER, PF_MODVER, PF_MODVER); 2550