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 | CTLFLAG_MPSAFE, 0, 277 "PFSYNC"); 278 SYSCTL_STRUCT(_net_pfsync, OID_AUTO, stats, CTLFLAG_VNET | CTLFLAG_RW, 279 &VNET_NAME(pfsyncstats), pfsyncstats, 280 "PFSYNC statistics (struct pfsyncstats, net/if_pfsync.h)"); 281 SYSCTL_INT(_net_pfsync, OID_AUTO, carp_demotion_factor, CTLFLAG_RW, 282 &VNET_NAME(pfsync_carp_adj), 0, "pfsync's CARP demotion factor adjustment"); 283 SYSCTL_ULONG(_net_pfsync, OID_AUTO, pfsync_buckets, CTLFLAG_RDTUN, 284 &pfsync_buckets, 0, "Number of pfsync hash buckets"); 285 286 static int pfsync_clone_create(struct if_clone *, int, caddr_t); 287 static void pfsync_clone_destroy(struct ifnet *); 288 static int pfsync_alloc_scrub_memory(struct pfsync_state_peer *, 289 struct pf_state_peer *); 290 static int pfsyncoutput(struct ifnet *, struct mbuf *, 291 const struct sockaddr *, struct route *); 292 static int pfsyncioctl(struct ifnet *, u_long, caddr_t); 293 294 static int pfsync_defer(struct pf_state *, struct mbuf *); 295 static void pfsync_undefer(struct pfsync_deferral *, int); 296 static void pfsync_undefer_state(struct pf_state *, int); 297 static void pfsync_defer_tmo(void *); 298 299 static void pfsync_request_update(u_int32_t, u_int64_t); 300 static bool pfsync_update_state_req(struct pf_state *); 301 302 static void pfsync_drop(struct pfsync_softc *); 303 static void pfsync_sendout(int, int); 304 static void pfsync_send_plus(void *, size_t); 305 306 static void pfsync_bulk_start(void); 307 static void pfsync_bulk_status(u_int8_t); 308 static void pfsync_bulk_update(void *); 309 static void pfsync_bulk_fail(void *); 310 311 static void pfsync_detach_ifnet(struct ifnet *); 312 #ifdef IPSEC 313 static void pfsync_update_net_tdb(struct pfsync_tdb *); 314 #endif 315 static struct pfsync_bucket *pfsync_get_bucket(struct pfsync_softc *, 316 struct pf_state *); 317 318 319 #define PFSYNC_MAX_BULKTRIES 12 320 321 VNET_DEFINE(struct if_clone *, pfsync_cloner); 322 #define V_pfsync_cloner VNET(pfsync_cloner) 323 324 static int 325 pfsync_clone_create(struct if_clone *ifc, int unit, caddr_t param) 326 { 327 struct pfsync_softc *sc; 328 struct ifnet *ifp; 329 struct pfsync_bucket *b; 330 int c, q; 331 332 if (unit != 0) 333 return (EINVAL); 334 335 if (! pfsync_buckets) 336 pfsync_buckets = mp_ncpus * 2; 337 338 sc = malloc(sizeof(struct pfsync_softc), M_PFSYNC, M_WAITOK | M_ZERO); 339 sc->sc_flags |= PFSYNCF_OK; 340 sc->sc_maxupdates = 128; 341 342 ifp = sc->sc_ifp = if_alloc(IFT_PFSYNC); 343 if (ifp == NULL) { 344 free(sc, M_PFSYNC); 345 return (ENOSPC); 346 } 347 if_initname(ifp, pfsyncname, unit); 348 ifp->if_softc = sc; 349 ifp->if_ioctl = pfsyncioctl; 350 ifp->if_output = pfsyncoutput; 351 ifp->if_type = IFT_PFSYNC; 352 ifp->if_hdrlen = sizeof(struct pfsync_header); 353 ifp->if_mtu = ETHERMTU; 354 mtx_init(&sc->sc_mtx, pfsyncname, NULL, MTX_DEF); 355 mtx_init(&sc->sc_bulk_mtx, "pfsync bulk", NULL, MTX_DEF); 356 callout_init_mtx(&sc->sc_bulk_tmo, &sc->sc_bulk_mtx, 0); 357 callout_init_mtx(&sc->sc_bulkfail_tmo, &sc->sc_bulk_mtx, 0); 358 359 if_attach(ifp); 360 361 bpfattach(ifp, DLT_PFSYNC, PFSYNC_HDRLEN); 362 363 sc->sc_buckets = mallocarray(pfsync_buckets, sizeof(*sc->sc_buckets), 364 M_PFSYNC, M_ZERO | M_WAITOK); 365 for (c = 0; c < pfsync_buckets; c++) { 366 b = &sc->sc_buckets[c]; 367 mtx_init(&b->b_mtx, "pfsync bucket", NULL, MTX_DEF); 368 369 b->b_id = c; 370 b->b_sc = sc; 371 b->b_len = PFSYNC_MINPKT; 372 373 for (q = 0; q < PFSYNC_S_COUNT; q++) 374 TAILQ_INIT(&b->b_qs[q]); 375 376 TAILQ_INIT(&b->b_upd_req_list); 377 TAILQ_INIT(&b->b_deferrals); 378 379 callout_init(&b->b_tmo, 1); 380 381 b->b_snd.ifq_maxlen = ifqmaxlen; 382 } 383 384 V_pfsyncif = sc; 385 386 return (0); 387 } 388 389 static void 390 pfsync_clone_destroy(struct ifnet *ifp) 391 { 392 struct pfsync_softc *sc = ifp->if_softc; 393 struct pfsync_bucket *b; 394 int c; 395 396 for (c = 0; c < pfsync_buckets; c++) { 397 b = &sc->sc_buckets[c]; 398 /* 399 * At this stage, everything should have already been 400 * cleared by pfsync_uninit(), and we have only to 401 * drain callouts. 402 */ 403 while (b->b_deferred > 0) { 404 struct pfsync_deferral *pd = 405 TAILQ_FIRST(&b->b_deferrals); 406 407 TAILQ_REMOVE(&b->b_deferrals, pd, pd_entry); 408 b->b_deferred--; 409 if (callout_stop(&pd->pd_tmo) > 0) { 410 pf_release_state(pd->pd_st); 411 m_freem(pd->pd_m); 412 free(pd, M_PFSYNC); 413 } else { 414 pd->pd_refs++; 415 callout_drain(&pd->pd_tmo); 416 free(pd, M_PFSYNC); 417 } 418 } 419 420 callout_drain(&b->b_tmo); 421 } 422 423 callout_drain(&sc->sc_bulkfail_tmo); 424 callout_drain(&sc->sc_bulk_tmo); 425 426 if (!(sc->sc_flags & PFSYNCF_OK) && carp_demote_adj_p) 427 (*carp_demote_adj_p)(-V_pfsync_carp_adj, "pfsync destroy"); 428 bpfdetach(ifp); 429 if_detach(ifp); 430 431 pfsync_drop(sc); 432 433 if_free(ifp); 434 pfsync_multicast_cleanup(sc); 435 mtx_destroy(&sc->sc_mtx); 436 mtx_destroy(&sc->sc_bulk_mtx); 437 438 free(sc->sc_buckets, M_PFSYNC); 439 free(sc, M_PFSYNC); 440 441 V_pfsyncif = NULL; 442 } 443 444 static int 445 pfsync_alloc_scrub_memory(struct pfsync_state_peer *s, 446 struct pf_state_peer *d) 447 { 448 if (s->scrub.scrub_flag && d->scrub == NULL) { 449 d->scrub = uma_zalloc(V_pf_state_scrub_z, M_NOWAIT | M_ZERO); 450 if (d->scrub == NULL) 451 return (ENOMEM); 452 } 453 454 return (0); 455 } 456 457 458 static int 459 pfsync_state_import(struct pfsync_state *sp, u_int8_t flags) 460 { 461 struct pfsync_softc *sc = V_pfsyncif; 462 #ifndef __NO_STRICT_ALIGNMENT 463 struct pfsync_state_key key[2]; 464 #endif 465 struct pfsync_state_key *kw, *ks; 466 struct pf_state *st = NULL; 467 struct pf_state_key *skw = NULL, *sks = NULL; 468 struct pf_rule *r = NULL; 469 struct pfi_kif *kif; 470 int error; 471 472 PF_RULES_RASSERT(); 473 474 if (sp->creatorid == 0) { 475 if (V_pf_status.debug >= PF_DEBUG_MISC) 476 printf("%s: invalid creator id: %08x\n", __func__, 477 ntohl(sp->creatorid)); 478 return (EINVAL); 479 } 480 481 if ((kif = pfi_kif_find(sp->ifname)) == NULL) { 482 if (V_pf_status.debug >= PF_DEBUG_MISC) 483 printf("%s: unknown interface: %s\n", __func__, 484 sp->ifname); 485 if (flags & PFSYNC_SI_IOCTL) 486 return (EINVAL); 487 return (0); /* skip this state */ 488 } 489 490 /* 491 * If the ruleset checksums match or the state is coming from the ioctl, 492 * it's safe to associate the state with the rule of that number. 493 */ 494 if (sp->rule != htonl(-1) && sp->anchor == htonl(-1) && 495 (flags & (PFSYNC_SI_IOCTL | PFSYNC_SI_CKSUM)) && ntohl(sp->rule) < 496 pf_main_ruleset.rules[PF_RULESET_FILTER].active.rcount) 497 r = pf_main_ruleset.rules[ 498 PF_RULESET_FILTER].active.ptr_array[ntohl(sp->rule)]; 499 else 500 r = &V_pf_default_rule; 501 502 if ((r->max_states && 503 counter_u64_fetch(r->states_cur) >= r->max_states)) 504 goto cleanup; 505 506 /* 507 * XXXGL: consider M_WAITOK in ioctl path after. 508 */ 509 if ((st = uma_zalloc(V_pf_state_z, M_NOWAIT | M_ZERO)) == NULL) 510 goto cleanup; 511 512 if ((skw = uma_zalloc(V_pf_state_key_z, M_NOWAIT)) == NULL) 513 goto cleanup; 514 515 #ifndef __NO_STRICT_ALIGNMENT 516 bcopy(&sp->key, key, sizeof(struct pfsync_state_key) * 2); 517 kw = &key[PF_SK_WIRE]; 518 ks = &key[PF_SK_STACK]; 519 #else 520 kw = &sp->key[PF_SK_WIRE]; 521 ks = &sp->key[PF_SK_STACK]; 522 #endif 523 524 if (PF_ANEQ(&kw->addr[0], &ks->addr[0], sp->af) || 525 PF_ANEQ(&kw->addr[1], &ks->addr[1], sp->af) || 526 kw->port[0] != ks->port[0] || 527 kw->port[1] != ks->port[1]) { 528 sks = uma_zalloc(V_pf_state_key_z, M_NOWAIT); 529 if (sks == NULL) 530 goto cleanup; 531 } else 532 sks = skw; 533 534 /* allocate memory for scrub info */ 535 if (pfsync_alloc_scrub_memory(&sp->src, &st->src) || 536 pfsync_alloc_scrub_memory(&sp->dst, &st->dst)) 537 goto cleanup; 538 539 /* Copy to state key(s). */ 540 skw->addr[0] = kw->addr[0]; 541 skw->addr[1] = kw->addr[1]; 542 skw->port[0] = kw->port[0]; 543 skw->port[1] = kw->port[1]; 544 skw->proto = sp->proto; 545 skw->af = sp->af; 546 if (sks != skw) { 547 sks->addr[0] = ks->addr[0]; 548 sks->addr[1] = ks->addr[1]; 549 sks->port[0] = ks->port[0]; 550 sks->port[1] = ks->port[1]; 551 sks->proto = sp->proto; 552 sks->af = sp->af; 553 } 554 555 /* copy to state */ 556 bcopy(&sp->rt_addr, &st->rt_addr, sizeof(st->rt_addr)); 557 st->creation = time_uptime - ntohl(sp->creation); 558 st->expire = time_uptime; 559 if (sp->expire) { 560 uint32_t timeout; 561 562 timeout = r->timeout[sp->timeout]; 563 if (!timeout) 564 timeout = V_pf_default_rule.timeout[sp->timeout]; 565 566 /* sp->expire may have been adaptively scaled by export. */ 567 st->expire -= timeout - ntohl(sp->expire); 568 } 569 570 st->direction = sp->direction; 571 st->log = sp->log; 572 st->timeout = sp->timeout; 573 st->state_flags = sp->state_flags; 574 575 st->id = sp->id; 576 st->creatorid = sp->creatorid; 577 pf_state_peer_ntoh(&sp->src, &st->src); 578 pf_state_peer_ntoh(&sp->dst, &st->dst); 579 580 st->rule.ptr = r; 581 st->nat_rule.ptr = NULL; 582 st->anchor.ptr = NULL; 583 st->rt_kif = NULL; 584 585 st->pfsync_time = time_uptime; 586 st->sync_state = PFSYNC_S_NONE; 587 588 if (!(flags & PFSYNC_SI_IOCTL)) 589 st->state_flags |= PFSTATE_NOSYNC; 590 591 if ((error = pf_state_insert(kif, skw, sks, st)) != 0) 592 goto cleanup_state; 593 594 /* XXX when we have nat_rule/anchors, use STATE_INC_COUNTERS */ 595 counter_u64_add(r->states_cur, 1); 596 counter_u64_add(r->states_tot, 1); 597 598 if (!(flags & PFSYNC_SI_IOCTL)) { 599 st->state_flags &= ~PFSTATE_NOSYNC; 600 if (st->state_flags & PFSTATE_ACK) { 601 pfsync_q_ins(st, PFSYNC_S_IACK, true); 602 pfsync_push_all(sc); 603 } 604 } 605 st->state_flags &= ~PFSTATE_ACK; 606 PF_STATE_UNLOCK(st); 607 608 return (0); 609 610 cleanup: 611 error = ENOMEM; 612 if (skw == sks) 613 sks = NULL; 614 if (skw != NULL) 615 uma_zfree(V_pf_state_key_z, skw); 616 if (sks != NULL) 617 uma_zfree(V_pf_state_key_z, sks); 618 619 cleanup_state: /* pf_state_insert() frees the state keys. */ 620 if (st) { 621 if (st->dst.scrub) 622 uma_zfree(V_pf_state_scrub_z, st->dst.scrub); 623 if (st->src.scrub) 624 uma_zfree(V_pf_state_scrub_z, st->src.scrub); 625 uma_zfree(V_pf_state_z, st); 626 } 627 return (error); 628 } 629 630 static int 631 pfsync_input(struct mbuf **mp, int *offp __unused, int proto __unused) 632 { 633 struct pfsync_softc *sc = V_pfsyncif; 634 struct pfsync_pkt pkt; 635 struct mbuf *m = *mp; 636 struct ip *ip = mtod(m, struct ip *); 637 struct pfsync_header *ph; 638 struct pfsync_subheader subh; 639 640 int offset, len; 641 int rv; 642 uint16_t count; 643 644 PF_RULES_RLOCK_TRACKER; 645 646 *mp = NULL; 647 V_pfsyncstats.pfsyncs_ipackets++; 648 649 /* Verify that we have a sync interface configured. */ 650 if (!sc || !sc->sc_sync_if || !V_pf_status.running || 651 (sc->sc_ifp->if_drv_flags & IFF_DRV_RUNNING) == 0) 652 goto done; 653 654 /* verify that the packet came in on the right interface */ 655 if (sc->sc_sync_if != m->m_pkthdr.rcvif) { 656 V_pfsyncstats.pfsyncs_badif++; 657 goto done; 658 } 659 660 if_inc_counter(sc->sc_ifp, IFCOUNTER_IPACKETS, 1); 661 if_inc_counter(sc->sc_ifp, IFCOUNTER_IBYTES, m->m_pkthdr.len); 662 /* verify that the IP TTL is 255. */ 663 if (ip->ip_ttl != PFSYNC_DFLTTL) { 664 V_pfsyncstats.pfsyncs_badttl++; 665 goto done; 666 } 667 668 offset = ip->ip_hl << 2; 669 if (m->m_pkthdr.len < offset + sizeof(*ph)) { 670 V_pfsyncstats.pfsyncs_hdrops++; 671 goto done; 672 } 673 674 if (offset + sizeof(*ph) > m->m_len) { 675 if (m_pullup(m, offset + sizeof(*ph)) == NULL) { 676 V_pfsyncstats.pfsyncs_hdrops++; 677 return (IPPROTO_DONE); 678 } 679 ip = mtod(m, struct ip *); 680 } 681 ph = (struct pfsync_header *)((char *)ip + offset); 682 683 /* verify the version */ 684 if (ph->version != PFSYNC_VERSION) { 685 V_pfsyncstats.pfsyncs_badver++; 686 goto done; 687 } 688 689 len = ntohs(ph->len) + offset; 690 if (m->m_pkthdr.len < len) { 691 V_pfsyncstats.pfsyncs_badlen++; 692 goto done; 693 } 694 695 /* Cheaper to grab this now than having to mess with mbufs later */ 696 pkt.ip = ip; 697 pkt.src = ip->ip_src; 698 pkt.flags = 0; 699 700 /* 701 * Trusting pf_chksum during packet processing, as well as seeking 702 * in interface name tree, require holding PF_RULES_RLOCK(). 703 */ 704 PF_RULES_RLOCK(); 705 if (!bcmp(&ph->pfcksum, &V_pf_status.pf_chksum, PF_MD5_DIGEST_LENGTH)) 706 pkt.flags |= PFSYNC_SI_CKSUM; 707 708 offset += sizeof(*ph); 709 while (offset <= len - sizeof(subh)) { 710 m_copydata(m, offset, sizeof(subh), (caddr_t)&subh); 711 offset += sizeof(subh); 712 713 if (subh.action >= PFSYNC_ACT_MAX) { 714 V_pfsyncstats.pfsyncs_badact++; 715 PF_RULES_RUNLOCK(); 716 goto done; 717 } 718 719 count = ntohs(subh.count); 720 V_pfsyncstats.pfsyncs_iacts[subh.action] += count; 721 rv = (*pfsync_acts[subh.action])(&pkt, m, offset, count); 722 if (rv == -1) { 723 PF_RULES_RUNLOCK(); 724 return (IPPROTO_DONE); 725 } 726 727 offset += rv; 728 } 729 PF_RULES_RUNLOCK(); 730 731 done: 732 m_freem(m); 733 return (IPPROTO_DONE); 734 } 735 736 static int 737 pfsync_in_clr(struct pfsync_pkt *pkt, struct mbuf *m, int offset, int count) 738 { 739 struct pfsync_clr *clr; 740 struct mbuf *mp; 741 int len = sizeof(*clr) * count; 742 int i, offp; 743 u_int32_t creatorid; 744 745 mp = m_pulldown(m, offset, len, &offp); 746 if (mp == NULL) { 747 V_pfsyncstats.pfsyncs_badlen++; 748 return (-1); 749 } 750 clr = (struct pfsync_clr *)(mp->m_data + offp); 751 752 for (i = 0; i < count; i++) { 753 creatorid = clr[i].creatorid; 754 755 if (clr[i].ifname[0] != '\0' && 756 pfi_kif_find(clr[i].ifname) == NULL) 757 continue; 758 759 for (int i = 0; i <= pf_hashmask; i++) { 760 struct pf_idhash *ih = &V_pf_idhash[i]; 761 struct pf_state *s; 762 relock: 763 PF_HASHROW_LOCK(ih); 764 LIST_FOREACH(s, &ih->states, entry) { 765 if (s->creatorid == creatorid) { 766 s->state_flags |= PFSTATE_NOSYNC; 767 pf_unlink_state(s, PF_ENTER_LOCKED); 768 goto relock; 769 } 770 } 771 PF_HASHROW_UNLOCK(ih); 772 } 773 } 774 775 return (len); 776 } 777 778 static int 779 pfsync_in_ins(struct pfsync_pkt *pkt, struct mbuf *m, int offset, int count) 780 { 781 struct mbuf *mp; 782 struct pfsync_state *sa, *sp; 783 int len = sizeof(*sp) * count; 784 int i, offp; 785 786 mp = m_pulldown(m, offset, len, &offp); 787 if (mp == NULL) { 788 V_pfsyncstats.pfsyncs_badlen++; 789 return (-1); 790 } 791 sa = (struct pfsync_state *)(mp->m_data + offp); 792 793 for (i = 0; i < count; i++) { 794 sp = &sa[i]; 795 796 /* Check for invalid values. */ 797 if (sp->timeout >= PFTM_MAX || 798 sp->src.state > PF_TCPS_PROXY_DST || 799 sp->dst.state > PF_TCPS_PROXY_DST || 800 sp->direction > PF_OUT || 801 (sp->af != AF_INET && sp->af != AF_INET6)) { 802 if (V_pf_status.debug >= PF_DEBUG_MISC) 803 printf("%s: invalid value\n", __func__); 804 V_pfsyncstats.pfsyncs_badval++; 805 continue; 806 } 807 808 if (pfsync_state_import(sp, pkt->flags) == ENOMEM) 809 /* Drop out, but process the rest of the actions. */ 810 break; 811 } 812 813 return (len); 814 } 815 816 static int 817 pfsync_in_iack(struct pfsync_pkt *pkt, struct mbuf *m, int offset, int count) 818 { 819 struct pfsync_ins_ack *ia, *iaa; 820 struct pf_state *st; 821 822 struct mbuf *mp; 823 int len = count * sizeof(*ia); 824 int offp, i; 825 826 mp = m_pulldown(m, offset, len, &offp); 827 if (mp == NULL) { 828 V_pfsyncstats.pfsyncs_badlen++; 829 return (-1); 830 } 831 iaa = (struct pfsync_ins_ack *)(mp->m_data + offp); 832 833 for (i = 0; i < count; i++) { 834 ia = &iaa[i]; 835 836 st = pf_find_state_byid(ia->id, ia->creatorid); 837 if (st == NULL) 838 continue; 839 840 if (st->state_flags & PFSTATE_ACK) { 841 pfsync_undefer_state(st, 0); 842 } 843 PF_STATE_UNLOCK(st); 844 } 845 /* 846 * XXX this is not yet implemented, but we know the size of the 847 * message so we can skip it. 848 */ 849 850 return (count * sizeof(struct pfsync_ins_ack)); 851 } 852 853 static int 854 pfsync_upd_tcp(struct pf_state *st, struct pfsync_state_peer *src, 855 struct pfsync_state_peer *dst) 856 { 857 int sync = 0; 858 859 PF_STATE_LOCK_ASSERT(st); 860 861 /* 862 * The state should never go backwards except 863 * for syn-proxy states. Neither should the 864 * sequence window slide backwards. 865 */ 866 if ((st->src.state > src->state && 867 (st->src.state < PF_TCPS_PROXY_SRC || 868 src->state >= PF_TCPS_PROXY_SRC)) || 869 870 (st->src.state == src->state && 871 SEQ_GT(st->src.seqlo, ntohl(src->seqlo)))) 872 sync++; 873 else 874 pf_state_peer_ntoh(src, &st->src); 875 876 if ((st->dst.state > dst->state) || 877 878 (st->dst.state >= TCPS_SYN_SENT && 879 SEQ_GT(st->dst.seqlo, ntohl(dst->seqlo)))) 880 sync++; 881 else 882 pf_state_peer_ntoh(dst, &st->dst); 883 884 return (sync); 885 } 886 887 static int 888 pfsync_in_upd(struct pfsync_pkt *pkt, struct mbuf *m, int offset, int count) 889 { 890 struct pfsync_softc *sc = V_pfsyncif; 891 struct pfsync_state *sa, *sp; 892 struct pf_state *st; 893 int sync; 894 895 struct mbuf *mp; 896 int len = count * sizeof(*sp); 897 int offp, i; 898 899 mp = m_pulldown(m, offset, len, &offp); 900 if (mp == NULL) { 901 V_pfsyncstats.pfsyncs_badlen++; 902 return (-1); 903 } 904 sa = (struct pfsync_state *)(mp->m_data + offp); 905 906 for (i = 0; i < count; i++) { 907 sp = &sa[i]; 908 909 /* check for invalid values */ 910 if (sp->timeout >= PFTM_MAX || 911 sp->src.state > PF_TCPS_PROXY_DST || 912 sp->dst.state > PF_TCPS_PROXY_DST) { 913 if (V_pf_status.debug >= PF_DEBUG_MISC) { 914 printf("pfsync_input: PFSYNC_ACT_UPD: " 915 "invalid value\n"); 916 } 917 V_pfsyncstats.pfsyncs_badval++; 918 continue; 919 } 920 921 st = pf_find_state_byid(sp->id, sp->creatorid); 922 if (st == NULL) { 923 /* insert the update */ 924 if (pfsync_state_import(sp, pkt->flags)) 925 V_pfsyncstats.pfsyncs_badstate++; 926 continue; 927 } 928 929 if (st->state_flags & PFSTATE_ACK) { 930 pfsync_undefer_state(st, 1); 931 } 932 933 if (st->key[PF_SK_WIRE]->proto == IPPROTO_TCP) 934 sync = pfsync_upd_tcp(st, &sp->src, &sp->dst); 935 else { 936 sync = 0; 937 938 /* 939 * Non-TCP protocol state machine always go 940 * forwards 941 */ 942 if (st->src.state > sp->src.state) 943 sync++; 944 else 945 pf_state_peer_ntoh(&sp->src, &st->src); 946 if (st->dst.state > sp->dst.state) 947 sync++; 948 else 949 pf_state_peer_ntoh(&sp->dst, &st->dst); 950 } 951 if (sync < 2) { 952 pfsync_alloc_scrub_memory(&sp->dst, &st->dst); 953 pf_state_peer_ntoh(&sp->dst, &st->dst); 954 st->expire = time_uptime; 955 st->timeout = sp->timeout; 956 } 957 st->pfsync_time = time_uptime; 958 959 if (sync) { 960 V_pfsyncstats.pfsyncs_stale++; 961 962 pfsync_update_state(st); 963 PF_STATE_UNLOCK(st); 964 pfsync_push_all(sc); 965 continue; 966 } 967 PF_STATE_UNLOCK(st); 968 } 969 970 return (len); 971 } 972 973 static int 974 pfsync_in_upd_c(struct pfsync_pkt *pkt, struct mbuf *m, int offset, int count) 975 { 976 struct pfsync_softc *sc = V_pfsyncif; 977 struct pfsync_upd_c *ua, *up; 978 struct pf_state *st; 979 int len = count * sizeof(*up); 980 int sync; 981 struct mbuf *mp; 982 int offp, i; 983 984 mp = m_pulldown(m, offset, len, &offp); 985 if (mp == NULL) { 986 V_pfsyncstats.pfsyncs_badlen++; 987 return (-1); 988 } 989 ua = (struct pfsync_upd_c *)(mp->m_data + offp); 990 991 for (i = 0; i < count; i++) { 992 up = &ua[i]; 993 994 /* check for invalid values */ 995 if (up->timeout >= PFTM_MAX || 996 up->src.state > PF_TCPS_PROXY_DST || 997 up->dst.state > PF_TCPS_PROXY_DST) { 998 if (V_pf_status.debug >= PF_DEBUG_MISC) { 999 printf("pfsync_input: " 1000 "PFSYNC_ACT_UPD_C: " 1001 "invalid value\n"); 1002 } 1003 V_pfsyncstats.pfsyncs_badval++; 1004 continue; 1005 } 1006 1007 st = pf_find_state_byid(up->id, up->creatorid); 1008 if (st == NULL) { 1009 /* We don't have this state. Ask for it. */ 1010 PFSYNC_BUCKET_LOCK(&sc->sc_buckets[0]); 1011 pfsync_request_update(up->creatorid, up->id); 1012 PFSYNC_BUCKET_UNLOCK(&sc->sc_buckets[0]); 1013 continue; 1014 } 1015 1016 if (st->state_flags & PFSTATE_ACK) { 1017 pfsync_undefer_state(st, 1); 1018 } 1019 1020 if (st->key[PF_SK_WIRE]->proto == IPPROTO_TCP) 1021 sync = pfsync_upd_tcp(st, &up->src, &up->dst); 1022 else { 1023 sync = 0; 1024 1025 /* 1026 * Non-TCP protocol state machine always go 1027 * forwards 1028 */ 1029 if (st->src.state > up->src.state) 1030 sync++; 1031 else 1032 pf_state_peer_ntoh(&up->src, &st->src); 1033 if (st->dst.state > up->dst.state) 1034 sync++; 1035 else 1036 pf_state_peer_ntoh(&up->dst, &st->dst); 1037 } 1038 if (sync < 2) { 1039 pfsync_alloc_scrub_memory(&up->dst, &st->dst); 1040 pf_state_peer_ntoh(&up->dst, &st->dst); 1041 st->expire = time_uptime; 1042 st->timeout = up->timeout; 1043 } 1044 st->pfsync_time = time_uptime; 1045 1046 if (sync) { 1047 V_pfsyncstats.pfsyncs_stale++; 1048 1049 pfsync_update_state(st); 1050 PF_STATE_UNLOCK(st); 1051 pfsync_push_all(sc); 1052 continue; 1053 } 1054 PF_STATE_UNLOCK(st); 1055 } 1056 1057 return (len); 1058 } 1059 1060 static int 1061 pfsync_in_ureq(struct pfsync_pkt *pkt, struct mbuf *m, int offset, int count) 1062 { 1063 struct pfsync_upd_req *ur, *ura; 1064 struct mbuf *mp; 1065 int len = count * sizeof(*ur); 1066 int i, offp; 1067 1068 struct pf_state *st; 1069 1070 mp = m_pulldown(m, offset, len, &offp); 1071 if (mp == NULL) { 1072 V_pfsyncstats.pfsyncs_badlen++; 1073 return (-1); 1074 } 1075 ura = (struct pfsync_upd_req *)(mp->m_data + offp); 1076 1077 for (i = 0; i < count; i++) { 1078 ur = &ura[i]; 1079 1080 if (ur->id == 0 && ur->creatorid == 0) 1081 pfsync_bulk_start(); 1082 else { 1083 st = pf_find_state_byid(ur->id, ur->creatorid); 1084 if (st == NULL) { 1085 V_pfsyncstats.pfsyncs_badstate++; 1086 continue; 1087 } 1088 if (st->state_flags & PFSTATE_NOSYNC) { 1089 PF_STATE_UNLOCK(st); 1090 continue; 1091 } 1092 1093 pfsync_update_state_req(st); 1094 PF_STATE_UNLOCK(st); 1095 } 1096 } 1097 1098 return (len); 1099 } 1100 1101 static int 1102 pfsync_in_del(struct pfsync_pkt *pkt, struct mbuf *m, int offset, int count) 1103 { 1104 struct mbuf *mp; 1105 struct pfsync_state *sa, *sp; 1106 struct pf_state *st; 1107 int len = count * sizeof(*sp); 1108 int offp, i; 1109 1110 mp = m_pulldown(m, offset, len, &offp); 1111 if (mp == NULL) { 1112 V_pfsyncstats.pfsyncs_badlen++; 1113 return (-1); 1114 } 1115 sa = (struct pfsync_state *)(mp->m_data + offp); 1116 1117 for (i = 0; i < count; i++) { 1118 sp = &sa[i]; 1119 1120 st = pf_find_state_byid(sp->id, sp->creatorid); 1121 if (st == NULL) { 1122 V_pfsyncstats.pfsyncs_badstate++; 1123 continue; 1124 } 1125 st->state_flags |= PFSTATE_NOSYNC; 1126 pf_unlink_state(st, PF_ENTER_LOCKED); 1127 } 1128 1129 return (len); 1130 } 1131 1132 static int 1133 pfsync_in_del_c(struct pfsync_pkt *pkt, struct mbuf *m, int offset, int count) 1134 { 1135 struct mbuf *mp; 1136 struct pfsync_del_c *sa, *sp; 1137 struct pf_state *st; 1138 int len = count * sizeof(*sp); 1139 int offp, i; 1140 1141 mp = m_pulldown(m, offset, len, &offp); 1142 if (mp == NULL) { 1143 V_pfsyncstats.pfsyncs_badlen++; 1144 return (-1); 1145 } 1146 sa = (struct pfsync_del_c *)(mp->m_data + offp); 1147 1148 for (i = 0; i < count; i++) { 1149 sp = &sa[i]; 1150 1151 st = pf_find_state_byid(sp->id, sp->creatorid); 1152 if (st == NULL) { 1153 V_pfsyncstats.pfsyncs_badstate++; 1154 continue; 1155 } 1156 1157 st->state_flags |= PFSTATE_NOSYNC; 1158 pf_unlink_state(st, PF_ENTER_LOCKED); 1159 } 1160 1161 return (len); 1162 } 1163 1164 static int 1165 pfsync_in_bus(struct pfsync_pkt *pkt, struct mbuf *m, int offset, int count) 1166 { 1167 struct pfsync_softc *sc = V_pfsyncif; 1168 struct pfsync_bus *bus; 1169 struct mbuf *mp; 1170 int len = count * sizeof(*bus); 1171 int offp; 1172 1173 PFSYNC_BLOCK(sc); 1174 1175 /* If we're not waiting for a bulk update, who cares. */ 1176 if (sc->sc_ureq_sent == 0) { 1177 PFSYNC_BUNLOCK(sc); 1178 return (len); 1179 } 1180 1181 mp = m_pulldown(m, offset, len, &offp); 1182 if (mp == NULL) { 1183 PFSYNC_BUNLOCK(sc); 1184 V_pfsyncstats.pfsyncs_badlen++; 1185 return (-1); 1186 } 1187 bus = (struct pfsync_bus *)(mp->m_data + offp); 1188 1189 switch (bus->status) { 1190 case PFSYNC_BUS_START: 1191 callout_reset(&sc->sc_bulkfail_tmo, 4 * hz + 1192 V_pf_limits[PF_LIMIT_STATES].limit / 1193 ((sc->sc_ifp->if_mtu - PFSYNC_MINPKT) / 1194 sizeof(struct pfsync_state)), 1195 pfsync_bulk_fail, sc); 1196 if (V_pf_status.debug >= PF_DEBUG_MISC) 1197 printf("pfsync: received bulk update start\n"); 1198 break; 1199 1200 case PFSYNC_BUS_END: 1201 if (time_uptime - ntohl(bus->endtime) >= 1202 sc->sc_ureq_sent) { 1203 /* that's it, we're happy */ 1204 sc->sc_ureq_sent = 0; 1205 sc->sc_bulk_tries = 0; 1206 callout_stop(&sc->sc_bulkfail_tmo); 1207 if (!(sc->sc_flags & PFSYNCF_OK) && carp_demote_adj_p) 1208 (*carp_demote_adj_p)(-V_pfsync_carp_adj, 1209 "pfsync bulk done"); 1210 sc->sc_flags |= PFSYNCF_OK; 1211 if (V_pf_status.debug >= PF_DEBUG_MISC) 1212 printf("pfsync: received valid " 1213 "bulk update end\n"); 1214 } else { 1215 if (V_pf_status.debug >= PF_DEBUG_MISC) 1216 printf("pfsync: received invalid " 1217 "bulk update end: bad timestamp\n"); 1218 } 1219 break; 1220 } 1221 PFSYNC_BUNLOCK(sc); 1222 1223 return (len); 1224 } 1225 1226 static int 1227 pfsync_in_tdb(struct pfsync_pkt *pkt, struct mbuf *m, int offset, int count) 1228 { 1229 int len = count * sizeof(struct pfsync_tdb); 1230 1231 #if defined(IPSEC) 1232 struct pfsync_tdb *tp; 1233 struct mbuf *mp; 1234 int offp; 1235 int i; 1236 int s; 1237 1238 mp = m_pulldown(m, offset, len, &offp); 1239 if (mp == NULL) { 1240 V_pfsyncstats.pfsyncs_badlen++; 1241 return (-1); 1242 } 1243 tp = (struct pfsync_tdb *)(mp->m_data + offp); 1244 1245 for (i = 0; i < count; i++) 1246 pfsync_update_net_tdb(&tp[i]); 1247 #endif 1248 1249 return (len); 1250 } 1251 1252 #if defined(IPSEC) 1253 /* Update an in-kernel tdb. Silently fail if no tdb is found. */ 1254 static void 1255 pfsync_update_net_tdb(struct pfsync_tdb *pt) 1256 { 1257 struct tdb *tdb; 1258 int s; 1259 1260 /* check for invalid values */ 1261 if (ntohl(pt->spi) <= SPI_RESERVED_MAX || 1262 (pt->dst.sa.sa_family != AF_INET && 1263 pt->dst.sa.sa_family != AF_INET6)) 1264 goto bad; 1265 1266 tdb = gettdb(pt->spi, &pt->dst, pt->sproto); 1267 if (tdb) { 1268 pt->rpl = ntohl(pt->rpl); 1269 pt->cur_bytes = (unsigned long long)be64toh(pt->cur_bytes); 1270 1271 /* Neither replay nor byte counter should ever decrease. */ 1272 if (pt->rpl < tdb->tdb_rpl || 1273 pt->cur_bytes < tdb->tdb_cur_bytes) { 1274 goto bad; 1275 } 1276 1277 tdb->tdb_rpl = pt->rpl; 1278 tdb->tdb_cur_bytes = pt->cur_bytes; 1279 } 1280 return; 1281 1282 bad: 1283 if (V_pf_status.debug >= PF_DEBUG_MISC) 1284 printf("pfsync_insert: PFSYNC_ACT_TDB_UPD: " 1285 "invalid value\n"); 1286 V_pfsyncstats.pfsyncs_badstate++; 1287 return; 1288 } 1289 #endif 1290 1291 1292 static int 1293 pfsync_in_eof(struct pfsync_pkt *pkt, struct mbuf *m, int offset, int count) 1294 { 1295 /* check if we are at the right place in the packet */ 1296 if (offset != m->m_pkthdr.len) 1297 V_pfsyncstats.pfsyncs_badlen++; 1298 1299 /* we're done. free and let the caller return */ 1300 m_freem(m); 1301 return (-1); 1302 } 1303 1304 static int 1305 pfsync_in_error(struct pfsync_pkt *pkt, struct mbuf *m, int offset, int count) 1306 { 1307 V_pfsyncstats.pfsyncs_badact++; 1308 1309 m_freem(m); 1310 return (-1); 1311 } 1312 1313 static int 1314 pfsyncoutput(struct ifnet *ifp, struct mbuf *m, const struct sockaddr *dst, 1315 struct route *rt) 1316 { 1317 m_freem(m); 1318 return (0); 1319 } 1320 1321 /* ARGSUSED */ 1322 static int 1323 pfsyncioctl(struct ifnet *ifp, u_long cmd, caddr_t data) 1324 { 1325 struct pfsync_softc *sc = ifp->if_softc; 1326 struct ifreq *ifr = (struct ifreq *)data; 1327 struct pfsyncreq pfsyncr; 1328 int error; 1329 int c; 1330 1331 switch (cmd) { 1332 case SIOCSIFFLAGS: 1333 PFSYNC_LOCK(sc); 1334 if (ifp->if_flags & IFF_UP) { 1335 ifp->if_drv_flags |= IFF_DRV_RUNNING; 1336 PFSYNC_UNLOCK(sc); 1337 pfsync_pointers_init(); 1338 } else { 1339 ifp->if_drv_flags &= ~IFF_DRV_RUNNING; 1340 PFSYNC_UNLOCK(sc); 1341 pfsync_pointers_uninit(); 1342 } 1343 break; 1344 case SIOCSIFMTU: 1345 if (!sc->sc_sync_if || 1346 ifr->ifr_mtu <= PFSYNC_MINPKT || 1347 ifr->ifr_mtu > sc->sc_sync_if->if_mtu) 1348 return (EINVAL); 1349 if (ifr->ifr_mtu < ifp->if_mtu) { 1350 for (c = 0; c < pfsync_buckets; c++) { 1351 PFSYNC_BUCKET_LOCK(&sc->sc_buckets[c]); 1352 if (sc->sc_buckets[c].b_len > PFSYNC_MINPKT) 1353 pfsync_sendout(1, c); 1354 PFSYNC_BUCKET_UNLOCK(&sc->sc_buckets[c]); 1355 } 1356 } 1357 ifp->if_mtu = ifr->ifr_mtu; 1358 break; 1359 case SIOCGETPFSYNC: 1360 bzero(&pfsyncr, sizeof(pfsyncr)); 1361 PFSYNC_LOCK(sc); 1362 if (sc->sc_sync_if) { 1363 strlcpy(pfsyncr.pfsyncr_syncdev, 1364 sc->sc_sync_if->if_xname, IFNAMSIZ); 1365 } 1366 pfsyncr.pfsyncr_syncpeer = sc->sc_sync_peer; 1367 pfsyncr.pfsyncr_maxupdates = sc->sc_maxupdates; 1368 pfsyncr.pfsyncr_defer = (PFSYNCF_DEFER == 1369 (sc->sc_flags & PFSYNCF_DEFER)); 1370 PFSYNC_UNLOCK(sc); 1371 return (copyout(&pfsyncr, ifr_data_get_ptr(ifr), 1372 sizeof(pfsyncr))); 1373 1374 case SIOCSETPFSYNC: 1375 { 1376 struct in_mfilter *imf = NULL; 1377 struct ifnet *sifp; 1378 struct ip *ip; 1379 1380 if ((error = priv_check(curthread, PRIV_NETINET_PF)) != 0) 1381 return (error); 1382 if ((error = copyin(ifr_data_get_ptr(ifr), &pfsyncr, 1383 sizeof(pfsyncr)))) 1384 return (error); 1385 1386 if (pfsyncr.pfsyncr_maxupdates > 255) 1387 return (EINVAL); 1388 1389 if (pfsyncr.pfsyncr_syncdev[0] == 0) 1390 sifp = NULL; 1391 else if ((sifp = ifunit_ref(pfsyncr.pfsyncr_syncdev)) == NULL) 1392 return (EINVAL); 1393 1394 if (sifp != NULL && ( 1395 pfsyncr.pfsyncr_syncpeer.s_addr == 0 || 1396 pfsyncr.pfsyncr_syncpeer.s_addr == 1397 htonl(INADDR_PFSYNC_GROUP))) 1398 imf = ip_mfilter_alloc(M_WAITOK, 0, 0); 1399 1400 PFSYNC_LOCK(sc); 1401 if (pfsyncr.pfsyncr_syncpeer.s_addr == 0) 1402 sc->sc_sync_peer.s_addr = htonl(INADDR_PFSYNC_GROUP); 1403 else 1404 sc->sc_sync_peer.s_addr = 1405 pfsyncr.pfsyncr_syncpeer.s_addr; 1406 1407 sc->sc_maxupdates = pfsyncr.pfsyncr_maxupdates; 1408 if (pfsyncr.pfsyncr_defer) { 1409 sc->sc_flags |= PFSYNCF_DEFER; 1410 V_pfsync_defer_ptr = pfsync_defer; 1411 } else { 1412 sc->sc_flags &= ~PFSYNCF_DEFER; 1413 V_pfsync_defer_ptr = NULL; 1414 } 1415 1416 if (sifp == NULL) { 1417 if (sc->sc_sync_if) 1418 if_rele(sc->sc_sync_if); 1419 sc->sc_sync_if = NULL; 1420 pfsync_multicast_cleanup(sc); 1421 PFSYNC_UNLOCK(sc); 1422 break; 1423 } 1424 1425 for (c = 0; c < pfsync_buckets; c++) { 1426 PFSYNC_BUCKET_LOCK(&sc->sc_buckets[c]); 1427 if (sc->sc_buckets[c].b_len > PFSYNC_MINPKT && 1428 (sifp->if_mtu < sc->sc_ifp->if_mtu || 1429 (sc->sc_sync_if != NULL && 1430 sifp->if_mtu < sc->sc_sync_if->if_mtu) || 1431 sifp->if_mtu < MCLBYTES - sizeof(struct ip))) 1432 pfsync_sendout(1, c); 1433 PFSYNC_BUCKET_UNLOCK(&sc->sc_buckets[c]); 1434 } 1435 1436 pfsync_multicast_cleanup(sc); 1437 1438 if (sc->sc_sync_peer.s_addr == htonl(INADDR_PFSYNC_GROUP)) { 1439 error = pfsync_multicast_setup(sc, sifp, imf); 1440 if (error) { 1441 if_rele(sifp); 1442 ip_mfilter_free(imf); 1443 PFSYNC_UNLOCK(sc); 1444 return (error); 1445 } 1446 } 1447 if (sc->sc_sync_if) 1448 if_rele(sc->sc_sync_if); 1449 sc->sc_sync_if = sifp; 1450 1451 ip = &sc->sc_template; 1452 bzero(ip, sizeof(*ip)); 1453 ip->ip_v = IPVERSION; 1454 ip->ip_hl = sizeof(sc->sc_template) >> 2; 1455 ip->ip_tos = IPTOS_LOWDELAY; 1456 /* len and id are set later. */ 1457 ip->ip_off = htons(IP_DF); 1458 ip->ip_ttl = PFSYNC_DFLTTL; 1459 ip->ip_p = IPPROTO_PFSYNC; 1460 ip->ip_src.s_addr = INADDR_ANY; 1461 ip->ip_dst.s_addr = sc->sc_sync_peer.s_addr; 1462 1463 /* Request a full state table update. */ 1464 if ((sc->sc_flags & PFSYNCF_OK) && carp_demote_adj_p) 1465 (*carp_demote_adj_p)(V_pfsync_carp_adj, 1466 "pfsync bulk start"); 1467 sc->sc_flags &= ~PFSYNCF_OK; 1468 if (V_pf_status.debug >= PF_DEBUG_MISC) 1469 printf("pfsync: requesting bulk update\n"); 1470 PFSYNC_UNLOCK(sc); 1471 PFSYNC_BUCKET_LOCK(&sc->sc_buckets[0]); 1472 pfsync_request_update(0, 0); 1473 PFSYNC_BUCKET_UNLOCK(&sc->sc_buckets[0]); 1474 PFSYNC_BLOCK(sc); 1475 sc->sc_ureq_sent = time_uptime; 1476 callout_reset(&sc->sc_bulkfail_tmo, 5 * hz, pfsync_bulk_fail, 1477 sc); 1478 PFSYNC_BUNLOCK(sc); 1479 1480 break; 1481 } 1482 default: 1483 return (ENOTTY); 1484 } 1485 1486 return (0); 1487 } 1488 1489 static void 1490 pfsync_out_state(struct pf_state *st, void *buf) 1491 { 1492 struct pfsync_state *sp = buf; 1493 1494 pfsync_state_export(sp, st); 1495 } 1496 1497 static void 1498 pfsync_out_iack(struct pf_state *st, void *buf) 1499 { 1500 struct pfsync_ins_ack *iack = buf; 1501 1502 iack->id = st->id; 1503 iack->creatorid = st->creatorid; 1504 } 1505 1506 static void 1507 pfsync_out_upd_c(struct pf_state *st, void *buf) 1508 { 1509 struct pfsync_upd_c *up = buf; 1510 1511 bzero(up, sizeof(*up)); 1512 up->id = st->id; 1513 pf_state_peer_hton(&st->src, &up->src); 1514 pf_state_peer_hton(&st->dst, &up->dst); 1515 up->creatorid = st->creatorid; 1516 up->timeout = st->timeout; 1517 } 1518 1519 static void 1520 pfsync_out_del(struct pf_state *st, void *buf) 1521 { 1522 struct pfsync_del_c *dp = buf; 1523 1524 dp->id = st->id; 1525 dp->creatorid = st->creatorid; 1526 st->state_flags |= PFSTATE_NOSYNC; 1527 } 1528 1529 static void 1530 pfsync_drop(struct pfsync_softc *sc) 1531 { 1532 struct pf_state *st, *next; 1533 struct pfsync_upd_req_item *ur; 1534 struct pfsync_bucket *b; 1535 int c, q; 1536 1537 for (c = 0; c < pfsync_buckets; c++) { 1538 b = &sc->sc_buckets[c]; 1539 for (q = 0; q < PFSYNC_S_COUNT; q++) { 1540 if (TAILQ_EMPTY(&b->b_qs[q])) 1541 continue; 1542 1543 TAILQ_FOREACH_SAFE(st, &b->b_qs[q], sync_list, next) { 1544 KASSERT(st->sync_state == q, 1545 ("%s: st->sync_state == q", 1546 __func__)); 1547 st->sync_state = PFSYNC_S_NONE; 1548 pf_release_state(st); 1549 } 1550 TAILQ_INIT(&b->b_qs[q]); 1551 } 1552 1553 while ((ur = TAILQ_FIRST(&b->b_upd_req_list)) != NULL) { 1554 TAILQ_REMOVE(&b->b_upd_req_list, ur, ur_entry); 1555 free(ur, M_PFSYNC); 1556 } 1557 1558 b->b_len = PFSYNC_MINPKT; 1559 b->b_plus = NULL; 1560 } 1561 } 1562 1563 static void 1564 pfsync_sendout(int schedswi, int c) 1565 { 1566 struct pfsync_softc *sc = V_pfsyncif; 1567 struct ifnet *ifp = sc->sc_ifp; 1568 struct mbuf *m; 1569 struct ip *ip; 1570 struct pfsync_header *ph; 1571 struct pfsync_subheader *subh; 1572 struct pf_state *st, *st_next; 1573 struct pfsync_upd_req_item *ur; 1574 struct pfsync_bucket *b = &sc->sc_buckets[c]; 1575 int offset; 1576 int q, count = 0; 1577 1578 KASSERT(sc != NULL, ("%s: null sc", __func__)); 1579 KASSERT(b->b_len > PFSYNC_MINPKT, 1580 ("%s: sc_len %zu", __func__, b->b_len)); 1581 PFSYNC_BUCKET_LOCK_ASSERT(b); 1582 1583 if (ifp->if_bpf == NULL && sc->sc_sync_if == NULL) { 1584 pfsync_drop(sc); 1585 return; 1586 } 1587 1588 m = m_get2(max_linkhdr + b->b_len, M_NOWAIT, MT_DATA, M_PKTHDR); 1589 if (m == NULL) { 1590 if_inc_counter(sc->sc_ifp, IFCOUNTER_OERRORS, 1); 1591 V_pfsyncstats.pfsyncs_onomem++; 1592 return; 1593 } 1594 m->m_data += max_linkhdr; 1595 m->m_len = m->m_pkthdr.len = b->b_len; 1596 1597 /* build the ip header */ 1598 ip = (struct ip *)m->m_data; 1599 bcopy(&sc->sc_template, ip, sizeof(*ip)); 1600 offset = sizeof(*ip); 1601 1602 ip->ip_len = htons(m->m_pkthdr.len); 1603 ip_fillid(ip); 1604 1605 /* build the pfsync header */ 1606 ph = (struct pfsync_header *)(m->m_data + offset); 1607 bzero(ph, sizeof(*ph)); 1608 offset += sizeof(*ph); 1609 1610 ph->version = PFSYNC_VERSION; 1611 ph->len = htons(b->b_len - sizeof(*ip)); 1612 bcopy(V_pf_status.pf_chksum, ph->pfcksum, PF_MD5_DIGEST_LENGTH); 1613 1614 /* walk the queues */ 1615 for (q = 0; q < PFSYNC_S_COUNT; q++) { 1616 if (TAILQ_EMPTY(&b->b_qs[q])) 1617 continue; 1618 1619 subh = (struct pfsync_subheader *)(m->m_data + offset); 1620 offset += sizeof(*subh); 1621 1622 count = 0; 1623 TAILQ_FOREACH_SAFE(st, &b->b_qs[q], sync_list, st_next) { 1624 KASSERT(st->sync_state == q, 1625 ("%s: st->sync_state == q", 1626 __func__)); 1627 /* 1628 * XXXGL: some of write methods do unlocked reads 1629 * of state data :( 1630 */ 1631 pfsync_qs[q].write(st, m->m_data + offset); 1632 offset += pfsync_qs[q].len; 1633 st->sync_state = PFSYNC_S_NONE; 1634 pf_release_state(st); 1635 count++; 1636 } 1637 TAILQ_INIT(&b->b_qs[q]); 1638 1639 bzero(subh, sizeof(*subh)); 1640 subh->action = pfsync_qs[q].action; 1641 subh->count = htons(count); 1642 V_pfsyncstats.pfsyncs_oacts[pfsync_qs[q].action] += count; 1643 } 1644 1645 if (!TAILQ_EMPTY(&b->b_upd_req_list)) { 1646 subh = (struct pfsync_subheader *)(m->m_data + offset); 1647 offset += sizeof(*subh); 1648 1649 count = 0; 1650 while ((ur = TAILQ_FIRST(&b->b_upd_req_list)) != NULL) { 1651 TAILQ_REMOVE(&b->b_upd_req_list, ur, ur_entry); 1652 1653 bcopy(&ur->ur_msg, m->m_data + offset, 1654 sizeof(ur->ur_msg)); 1655 offset += sizeof(ur->ur_msg); 1656 free(ur, M_PFSYNC); 1657 count++; 1658 } 1659 1660 bzero(subh, sizeof(*subh)); 1661 subh->action = PFSYNC_ACT_UPD_REQ; 1662 subh->count = htons(count); 1663 V_pfsyncstats.pfsyncs_oacts[PFSYNC_ACT_UPD_REQ] += count; 1664 } 1665 1666 /* has someone built a custom region for us to add? */ 1667 if (b->b_plus != NULL) { 1668 bcopy(b->b_plus, m->m_data + offset, b->b_pluslen); 1669 offset += b->b_pluslen; 1670 1671 b->b_plus = NULL; 1672 } 1673 1674 subh = (struct pfsync_subheader *)(m->m_data + offset); 1675 offset += sizeof(*subh); 1676 1677 bzero(subh, sizeof(*subh)); 1678 subh->action = PFSYNC_ACT_EOF; 1679 subh->count = htons(1); 1680 V_pfsyncstats.pfsyncs_oacts[PFSYNC_ACT_EOF]++; 1681 1682 /* we're done, let's put it on the wire */ 1683 if (ifp->if_bpf) { 1684 m->m_data += sizeof(*ip); 1685 m->m_len = m->m_pkthdr.len = b->b_len - sizeof(*ip); 1686 BPF_MTAP(ifp, m); 1687 m->m_data -= sizeof(*ip); 1688 m->m_len = m->m_pkthdr.len = b->b_len; 1689 } 1690 1691 if (sc->sc_sync_if == NULL) { 1692 b->b_len = PFSYNC_MINPKT; 1693 m_freem(m); 1694 return; 1695 } 1696 1697 if_inc_counter(sc->sc_ifp, IFCOUNTER_OPACKETS, 1); 1698 if_inc_counter(sc->sc_ifp, IFCOUNTER_OBYTES, m->m_pkthdr.len); 1699 b->b_len = PFSYNC_MINPKT; 1700 1701 if (!_IF_QFULL(&b->b_snd)) 1702 _IF_ENQUEUE(&b->b_snd, m); 1703 else { 1704 m_freem(m); 1705 if_inc_counter(sc->sc_ifp, IFCOUNTER_OQDROPS, 1); 1706 } 1707 if (schedswi) 1708 swi_sched(V_pfsync_swi_cookie, 0); 1709 } 1710 1711 static void 1712 pfsync_insert_state(struct pf_state *st) 1713 { 1714 struct pfsync_softc *sc = V_pfsyncif; 1715 struct pfsync_bucket *b = pfsync_get_bucket(sc, st); 1716 1717 if (st->state_flags & PFSTATE_NOSYNC) 1718 return; 1719 1720 if ((st->rule.ptr->rule_flag & PFRULE_NOSYNC) || 1721 st->key[PF_SK_WIRE]->proto == IPPROTO_PFSYNC) { 1722 st->state_flags |= PFSTATE_NOSYNC; 1723 return; 1724 } 1725 1726 KASSERT(st->sync_state == PFSYNC_S_NONE, 1727 ("%s: st->sync_state %u", __func__, st->sync_state)); 1728 1729 PFSYNC_BUCKET_LOCK(b); 1730 if (b->b_len == PFSYNC_MINPKT) 1731 callout_reset(&b->b_tmo, 1 * hz, pfsync_timeout, b); 1732 1733 pfsync_q_ins(st, PFSYNC_S_INS, true); 1734 PFSYNC_BUCKET_UNLOCK(b); 1735 1736 st->sync_updates = 0; 1737 } 1738 1739 static int 1740 pfsync_defer(struct pf_state *st, struct mbuf *m) 1741 { 1742 struct pfsync_softc *sc = V_pfsyncif; 1743 struct pfsync_deferral *pd; 1744 struct pfsync_bucket *b = pfsync_get_bucket(sc, st); 1745 1746 if (m->m_flags & (M_BCAST|M_MCAST)) 1747 return (0); 1748 1749 PFSYNC_LOCK(sc); 1750 1751 if (sc == NULL || !(sc->sc_ifp->if_flags & IFF_DRV_RUNNING) || 1752 !(sc->sc_flags & PFSYNCF_DEFER)) { 1753 PFSYNC_UNLOCK(sc); 1754 return (0); 1755 } 1756 1757 if (b->b_deferred >= 128) 1758 pfsync_undefer(TAILQ_FIRST(&b->b_deferrals), 0); 1759 1760 pd = malloc(sizeof(*pd), M_PFSYNC, M_NOWAIT); 1761 if (pd == NULL) 1762 return (0); 1763 b->b_deferred++; 1764 1765 m->m_flags |= M_SKIP_FIREWALL; 1766 st->state_flags |= PFSTATE_ACK; 1767 1768 pd->pd_sc = sc; 1769 pd->pd_refs = 0; 1770 pd->pd_st = st; 1771 pf_ref_state(st); 1772 pd->pd_m = m; 1773 1774 TAILQ_INSERT_TAIL(&b->b_deferrals, pd, pd_entry); 1775 callout_init_mtx(&pd->pd_tmo, &b->b_mtx, CALLOUT_RETURNUNLOCKED); 1776 callout_reset(&pd->pd_tmo, 10, pfsync_defer_tmo, pd); 1777 1778 pfsync_push(b); 1779 1780 return (1); 1781 } 1782 1783 static void 1784 pfsync_undefer(struct pfsync_deferral *pd, int drop) 1785 { 1786 struct pfsync_softc *sc = pd->pd_sc; 1787 struct mbuf *m = pd->pd_m; 1788 struct pf_state *st = pd->pd_st; 1789 struct pfsync_bucket *b = pfsync_get_bucket(sc, st); 1790 1791 PFSYNC_BUCKET_LOCK_ASSERT(b); 1792 1793 TAILQ_REMOVE(&b->b_deferrals, pd, pd_entry); 1794 b->b_deferred--; 1795 pd->pd_st->state_flags &= ~PFSTATE_ACK; /* XXX: locking! */ 1796 free(pd, M_PFSYNC); 1797 pf_release_state(st); 1798 1799 if (drop) 1800 m_freem(m); 1801 else { 1802 _IF_ENQUEUE(&b->b_snd, m); 1803 pfsync_push(b); 1804 } 1805 } 1806 1807 static void 1808 pfsync_defer_tmo(void *arg) 1809 { 1810 struct epoch_tracker et; 1811 struct pfsync_deferral *pd = arg; 1812 struct pfsync_softc *sc = pd->pd_sc; 1813 struct mbuf *m = pd->pd_m; 1814 struct pf_state *st = pd->pd_st; 1815 struct pfsync_bucket *b = pfsync_get_bucket(sc, st); 1816 1817 PFSYNC_BUCKET_LOCK_ASSERT(b); 1818 1819 NET_EPOCH_ENTER(et); 1820 CURVNET_SET(m->m_pkthdr.rcvif->if_vnet); 1821 1822 TAILQ_REMOVE(&b->b_deferrals, pd, pd_entry); 1823 b->b_deferred--; 1824 pd->pd_st->state_flags &= ~PFSTATE_ACK; /* XXX: locking! */ 1825 if (pd->pd_refs == 0) 1826 free(pd, M_PFSYNC); 1827 PFSYNC_UNLOCK(sc); 1828 1829 ip_output(m, NULL, NULL, 0, NULL, NULL); 1830 1831 pf_release_state(st); 1832 1833 CURVNET_RESTORE(); 1834 NET_EPOCH_EXIT(et); 1835 } 1836 1837 static void 1838 pfsync_undefer_state(struct pf_state *st, int drop) 1839 { 1840 struct pfsync_softc *sc = V_pfsyncif; 1841 struct pfsync_deferral *pd; 1842 struct pfsync_bucket *b = pfsync_get_bucket(sc, st); 1843 1844 PFSYNC_BUCKET_LOCK(b); 1845 1846 TAILQ_FOREACH(pd, &b->b_deferrals, pd_entry) { 1847 if (pd->pd_st == st) { 1848 if (callout_stop(&pd->pd_tmo) > 0) 1849 pfsync_undefer(pd, drop); 1850 1851 PFSYNC_BUCKET_UNLOCK(b); 1852 return; 1853 } 1854 } 1855 PFSYNC_BUCKET_UNLOCK(b); 1856 1857 panic("%s: unable to find deferred state", __func__); 1858 } 1859 1860 static struct pfsync_bucket* 1861 pfsync_get_bucket(struct pfsync_softc *sc, struct pf_state *st) 1862 { 1863 int c = PF_IDHASH(st) % pfsync_buckets; 1864 return &sc->sc_buckets[c]; 1865 } 1866 1867 static void 1868 pfsync_update_state(struct pf_state *st) 1869 { 1870 struct pfsync_softc *sc = V_pfsyncif; 1871 bool sync = false, ref = true; 1872 struct pfsync_bucket *b = pfsync_get_bucket(sc, st); 1873 1874 PF_STATE_LOCK_ASSERT(st); 1875 PFSYNC_BUCKET_LOCK(b); 1876 1877 if (st->state_flags & PFSTATE_ACK) 1878 pfsync_undefer_state(st, 0); 1879 if (st->state_flags & PFSTATE_NOSYNC) { 1880 if (st->sync_state != PFSYNC_S_NONE) 1881 pfsync_q_del(st, true, b); 1882 PFSYNC_BUCKET_UNLOCK(b); 1883 return; 1884 } 1885 1886 if (b->b_len == PFSYNC_MINPKT) 1887 callout_reset(&b->b_tmo, 1 * hz, pfsync_timeout, b); 1888 1889 switch (st->sync_state) { 1890 case PFSYNC_S_UPD_C: 1891 case PFSYNC_S_UPD: 1892 case PFSYNC_S_INS: 1893 /* we're already handling it */ 1894 1895 if (st->key[PF_SK_WIRE]->proto == IPPROTO_TCP) { 1896 st->sync_updates++; 1897 if (st->sync_updates >= sc->sc_maxupdates) 1898 sync = true; 1899 } 1900 break; 1901 1902 case PFSYNC_S_IACK: 1903 pfsync_q_del(st, false, b); 1904 ref = false; 1905 /* FALLTHROUGH */ 1906 1907 case PFSYNC_S_NONE: 1908 pfsync_q_ins(st, PFSYNC_S_UPD_C, ref); 1909 st->sync_updates = 0; 1910 break; 1911 1912 default: 1913 panic("%s: unexpected sync state %d", __func__, st->sync_state); 1914 } 1915 1916 if (sync || (time_uptime - st->pfsync_time) < 2) 1917 pfsync_push(b); 1918 1919 PFSYNC_BUCKET_UNLOCK(b); 1920 } 1921 1922 static void 1923 pfsync_request_update(u_int32_t creatorid, u_int64_t id) 1924 { 1925 struct pfsync_softc *sc = V_pfsyncif; 1926 struct pfsync_bucket *b = &sc->sc_buckets[0]; 1927 struct pfsync_upd_req_item *item; 1928 size_t nlen = sizeof(struct pfsync_upd_req); 1929 1930 PFSYNC_BUCKET_LOCK_ASSERT(b); 1931 1932 /* 1933 * This code does a bit to prevent multiple update requests for the 1934 * same state being generated. It searches current subheader queue, 1935 * but it doesn't lookup into queue of already packed datagrams. 1936 */ 1937 TAILQ_FOREACH(item, &b->b_upd_req_list, ur_entry) 1938 if (item->ur_msg.id == id && 1939 item->ur_msg.creatorid == creatorid) 1940 return; 1941 1942 item = malloc(sizeof(*item), M_PFSYNC, M_NOWAIT); 1943 if (item == NULL) 1944 return; /* XXX stats */ 1945 1946 item->ur_msg.id = id; 1947 item->ur_msg.creatorid = creatorid; 1948 1949 if (TAILQ_EMPTY(&b->b_upd_req_list)) 1950 nlen += sizeof(struct pfsync_subheader); 1951 1952 if (b->b_len + nlen > sc->sc_ifp->if_mtu) { 1953 pfsync_sendout(1, 0); 1954 1955 nlen = sizeof(struct pfsync_subheader) + 1956 sizeof(struct pfsync_upd_req); 1957 } 1958 1959 TAILQ_INSERT_TAIL(&b->b_upd_req_list, item, ur_entry); 1960 b->b_len += nlen; 1961 } 1962 1963 static bool 1964 pfsync_update_state_req(struct pf_state *st) 1965 { 1966 struct pfsync_softc *sc = V_pfsyncif; 1967 bool ref = true, full = false; 1968 struct pfsync_bucket *b = pfsync_get_bucket(sc, st); 1969 1970 PF_STATE_LOCK_ASSERT(st); 1971 PFSYNC_BUCKET_LOCK(b); 1972 1973 if (st->state_flags & PFSTATE_NOSYNC) { 1974 if (st->sync_state != PFSYNC_S_NONE) 1975 pfsync_q_del(st, true, b); 1976 PFSYNC_BUCKET_UNLOCK(b); 1977 return (full); 1978 } 1979 1980 switch (st->sync_state) { 1981 case PFSYNC_S_UPD_C: 1982 case PFSYNC_S_IACK: 1983 pfsync_q_del(st, false, b); 1984 ref = false; 1985 /* FALLTHROUGH */ 1986 1987 case PFSYNC_S_NONE: 1988 pfsync_q_ins(st, PFSYNC_S_UPD, ref); 1989 pfsync_push(b); 1990 break; 1991 1992 case PFSYNC_S_INS: 1993 case PFSYNC_S_UPD: 1994 case PFSYNC_S_DEL: 1995 /* we're already handling it */ 1996 break; 1997 1998 default: 1999 panic("%s: unexpected sync state %d", __func__, st->sync_state); 2000 } 2001 2002 if ((sc->sc_ifp->if_mtu - b->b_len) < sizeof(struct pfsync_state)) 2003 full = true; 2004 2005 PFSYNC_BUCKET_UNLOCK(b); 2006 2007 return (full); 2008 } 2009 2010 static void 2011 pfsync_delete_state(struct pf_state *st) 2012 { 2013 struct pfsync_softc *sc = V_pfsyncif; 2014 struct pfsync_bucket *b = pfsync_get_bucket(sc, st); 2015 bool ref = true; 2016 2017 PFSYNC_BUCKET_LOCK(b); 2018 if (st->state_flags & PFSTATE_ACK) 2019 pfsync_undefer_state(st, 1); 2020 if (st->state_flags & PFSTATE_NOSYNC) { 2021 if (st->sync_state != PFSYNC_S_NONE) 2022 pfsync_q_del(st, true, b); 2023 PFSYNC_BUCKET_UNLOCK(b); 2024 return; 2025 } 2026 2027 if (b->b_len == PFSYNC_MINPKT) 2028 callout_reset(&b->b_tmo, 1 * hz, pfsync_timeout, b); 2029 2030 switch (st->sync_state) { 2031 case PFSYNC_S_INS: 2032 /* We never got to tell the world so just forget about it. */ 2033 pfsync_q_del(st, true, b); 2034 break; 2035 2036 case PFSYNC_S_UPD_C: 2037 case PFSYNC_S_UPD: 2038 case PFSYNC_S_IACK: 2039 pfsync_q_del(st, false, b); 2040 ref = false; 2041 /* FALLTHROUGH */ 2042 2043 case PFSYNC_S_NONE: 2044 pfsync_q_ins(st, PFSYNC_S_DEL, ref); 2045 break; 2046 2047 default: 2048 panic("%s: unexpected sync state %d", __func__, st->sync_state); 2049 } 2050 2051 PFSYNC_BUCKET_UNLOCK(b); 2052 } 2053 2054 static void 2055 pfsync_clear_states(u_int32_t creatorid, const char *ifname) 2056 { 2057 struct { 2058 struct pfsync_subheader subh; 2059 struct pfsync_clr clr; 2060 } __packed r; 2061 2062 bzero(&r, sizeof(r)); 2063 2064 r.subh.action = PFSYNC_ACT_CLR; 2065 r.subh.count = htons(1); 2066 V_pfsyncstats.pfsyncs_oacts[PFSYNC_ACT_CLR]++; 2067 2068 strlcpy(r.clr.ifname, ifname, sizeof(r.clr.ifname)); 2069 r.clr.creatorid = creatorid; 2070 2071 pfsync_send_plus(&r, sizeof(r)); 2072 } 2073 2074 static void 2075 pfsync_q_ins(struct pf_state *st, int q, bool ref) 2076 { 2077 struct pfsync_softc *sc = V_pfsyncif; 2078 size_t nlen = pfsync_qs[q].len; 2079 struct pfsync_bucket *b = pfsync_get_bucket(sc, st); 2080 2081 PFSYNC_BUCKET_LOCK_ASSERT(b); 2082 2083 KASSERT(st->sync_state == PFSYNC_S_NONE, 2084 ("%s: st->sync_state %u", __func__, st->sync_state)); 2085 KASSERT(b->b_len >= PFSYNC_MINPKT, ("pfsync pkt len is too low %zu", 2086 b->b_len)); 2087 2088 if (TAILQ_EMPTY(&b->b_qs[q])) 2089 nlen += sizeof(struct pfsync_subheader); 2090 2091 if (b->b_len + nlen > sc->sc_ifp->if_mtu) { 2092 pfsync_sendout(1, b->b_id); 2093 2094 nlen = sizeof(struct pfsync_subheader) + pfsync_qs[q].len; 2095 } 2096 2097 b->b_len += nlen; 2098 TAILQ_INSERT_TAIL(&b->b_qs[q], st, sync_list); 2099 st->sync_state = q; 2100 if (ref) 2101 pf_ref_state(st); 2102 } 2103 2104 static void 2105 pfsync_q_del(struct pf_state *st, bool unref, struct pfsync_bucket *b) 2106 { 2107 int q = st->sync_state; 2108 2109 PFSYNC_BUCKET_LOCK_ASSERT(b); 2110 KASSERT(st->sync_state != PFSYNC_S_NONE, 2111 ("%s: st->sync_state != PFSYNC_S_NONE", __func__)); 2112 2113 b->b_len -= pfsync_qs[q].len; 2114 TAILQ_REMOVE(&b->b_qs[q], st, sync_list); 2115 st->sync_state = PFSYNC_S_NONE; 2116 if (unref) 2117 pf_release_state(st); 2118 2119 if (TAILQ_EMPTY(&b->b_qs[q])) 2120 b->b_len -= sizeof(struct pfsync_subheader); 2121 } 2122 2123 static void 2124 pfsync_bulk_start(void) 2125 { 2126 struct pfsync_softc *sc = V_pfsyncif; 2127 2128 if (V_pf_status.debug >= PF_DEBUG_MISC) 2129 printf("pfsync: received bulk update request\n"); 2130 2131 PFSYNC_BLOCK(sc); 2132 2133 sc->sc_ureq_received = time_uptime; 2134 sc->sc_bulk_hashid = 0; 2135 sc->sc_bulk_stateid = 0; 2136 pfsync_bulk_status(PFSYNC_BUS_START); 2137 callout_reset(&sc->sc_bulk_tmo, 1, pfsync_bulk_update, sc); 2138 PFSYNC_BUNLOCK(sc); 2139 } 2140 2141 static void 2142 pfsync_bulk_update(void *arg) 2143 { 2144 struct pfsync_softc *sc = arg; 2145 struct pf_state *s; 2146 int i, sent = 0; 2147 2148 PFSYNC_BLOCK_ASSERT(sc); 2149 CURVNET_SET(sc->sc_ifp->if_vnet); 2150 2151 /* 2152 * Start with last state from previous invocation. 2153 * It may had gone, in this case start from the 2154 * hash slot. 2155 */ 2156 s = pf_find_state_byid(sc->sc_bulk_stateid, sc->sc_bulk_creatorid); 2157 2158 if (s != NULL) 2159 i = PF_IDHASH(s); 2160 else 2161 i = sc->sc_bulk_hashid; 2162 2163 for (; i <= pf_hashmask; i++) { 2164 struct pf_idhash *ih = &V_pf_idhash[i]; 2165 2166 if (s != NULL) 2167 PF_HASHROW_ASSERT(ih); 2168 else { 2169 PF_HASHROW_LOCK(ih); 2170 s = LIST_FIRST(&ih->states); 2171 } 2172 2173 for (; s; s = LIST_NEXT(s, entry)) { 2174 if (s->sync_state == PFSYNC_S_NONE && 2175 s->timeout < PFTM_MAX && 2176 s->pfsync_time <= sc->sc_ureq_received) { 2177 if (pfsync_update_state_req(s)) { 2178 /* We've filled a packet. */ 2179 sc->sc_bulk_hashid = i; 2180 sc->sc_bulk_stateid = s->id; 2181 sc->sc_bulk_creatorid = s->creatorid; 2182 PF_HASHROW_UNLOCK(ih); 2183 callout_reset(&sc->sc_bulk_tmo, 1, 2184 pfsync_bulk_update, sc); 2185 goto full; 2186 } 2187 sent++; 2188 } 2189 } 2190 PF_HASHROW_UNLOCK(ih); 2191 } 2192 2193 /* We're done. */ 2194 pfsync_bulk_status(PFSYNC_BUS_END); 2195 full: 2196 CURVNET_RESTORE(); 2197 } 2198 2199 static void 2200 pfsync_bulk_status(u_int8_t status) 2201 { 2202 struct { 2203 struct pfsync_subheader subh; 2204 struct pfsync_bus bus; 2205 } __packed r; 2206 2207 struct pfsync_softc *sc = V_pfsyncif; 2208 2209 bzero(&r, sizeof(r)); 2210 2211 r.subh.action = PFSYNC_ACT_BUS; 2212 r.subh.count = htons(1); 2213 V_pfsyncstats.pfsyncs_oacts[PFSYNC_ACT_BUS]++; 2214 2215 r.bus.creatorid = V_pf_status.hostid; 2216 r.bus.endtime = htonl(time_uptime - sc->sc_ureq_received); 2217 r.bus.status = status; 2218 2219 pfsync_send_plus(&r, sizeof(r)); 2220 } 2221 2222 static void 2223 pfsync_bulk_fail(void *arg) 2224 { 2225 struct pfsync_softc *sc = arg; 2226 struct pfsync_bucket *b = &sc->sc_buckets[0]; 2227 2228 CURVNET_SET(sc->sc_ifp->if_vnet); 2229 2230 PFSYNC_BLOCK_ASSERT(sc); 2231 2232 if (sc->sc_bulk_tries++ < PFSYNC_MAX_BULKTRIES) { 2233 /* Try again */ 2234 callout_reset(&sc->sc_bulkfail_tmo, 5 * hz, 2235 pfsync_bulk_fail, V_pfsyncif); 2236 PFSYNC_BUCKET_LOCK(b); 2237 pfsync_request_update(0, 0); 2238 PFSYNC_BUCKET_UNLOCK(b); 2239 } else { 2240 /* Pretend like the transfer was ok. */ 2241 sc->sc_ureq_sent = 0; 2242 sc->sc_bulk_tries = 0; 2243 PFSYNC_LOCK(sc); 2244 if (!(sc->sc_flags & PFSYNCF_OK) && carp_demote_adj_p) 2245 (*carp_demote_adj_p)(-V_pfsync_carp_adj, 2246 "pfsync bulk fail"); 2247 sc->sc_flags |= PFSYNCF_OK; 2248 PFSYNC_UNLOCK(sc); 2249 if (V_pf_status.debug >= PF_DEBUG_MISC) 2250 printf("pfsync: failed to receive bulk update\n"); 2251 } 2252 2253 CURVNET_RESTORE(); 2254 } 2255 2256 static void 2257 pfsync_send_plus(void *plus, size_t pluslen) 2258 { 2259 struct pfsync_softc *sc = V_pfsyncif; 2260 struct pfsync_bucket *b = &sc->sc_buckets[0]; 2261 2262 PFSYNC_BUCKET_LOCK(b); 2263 2264 if (b->b_len + pluslen > sc->sc_ifp->if_mtu) 2265 pfsync_sendout(1, b->b_id); 2266 2267 b->b_plus = plus; 2268 b->b_len += (b->b_pluslen = pluslen); 2269 2270 pfsync_sendout(1, b->b_id); 2271 PFSYNC_BUCKET_UNLOCK(b); 2272 } 2273 2274 static void 2275 pfsync_timeout(void *arg) 2276 { 2277 struct pfsync_bucket *b = arg; 2278 2279 CURVNET_SET(b->b_sc->sc_ifp->if_vnet); 2280 PFSYNC_BUCKET_LOCK(b); 2281 pfsync_push(b); 2282 PFSYNC_BUCKET_UNLOCK(b); 2283 CURVNET_RESTORE(); 2284 } 2285 2286 static void 2287 pfsync_push(struct pfsync_bucket *b) 2288 { 2289 2290 PFSYNC_BUCKET_LOCK_ASSERT(b); 2291 2292 b->b_flags |= PFSYNCF_BUCKET_PUSH; 2293 swi_sched(V_pfsync_swi_cookie, 0); 2294 } 2295 2296 static void 2297 pfsync_push_all(struct pfsync_softc *sc) 2298 { 2299 int c; 2300 struct pfsync_bucket *b; 2301 2302 for (c = 0; c < pfsync_buckets; c++) { 2303 b = &sc->sc_buckets[c]; 2304 2305 PFSYNC_BUCKET_LOCK(b); 2306 pfsync_push(b); 2307 PFSYNC_BUCKET_UNLOCK(b); 2308 } 2309 } 2310 2311 static void 2312 pfsyncintr(void *arg) 2313 { 2314 struct epoch_tracker et; 2315 struct pfsync_softc *sc = arg; 2316 struct pfsync_bucket *b; 2317 struct mbuf *m, *n; 2318 int c; 2319 2320 NET_EPOCH_ENTER(et); 2321 CURVNET_SET(sc->sc_ifp->if_vnet); 2322 2323 for (c = 0; c < pfsync_buckets; c++) { 2324 b = &sc->sc_buckets[c]; 2325 2326 PFSYNC_BUCKET_LOCK(b); 2327 if ((b->b_flags & PFSYNCF_BUCKET_PUSH) && b->b_len > PFSYNC_MINPKT) { 2328 pfsync_sendout(0, b->b_id); 2329 b->b_flags &= ~PFSYNCF_BUCKET_PUSH; 2330 } 2331 _IF_DEQUEUE_ALL(&b->b_snd, m); 2332 PFSYNC_BUCKET_UNLOCK(b); 2333 2334 for (; m != NULL; m = n) { 2335 2336 n = m->m_nextpkt; 2337 m->m_nextpkt = NULL; 2338 2339 /* 2340 * We distinguish between a deferral packet and our 2341 * own pfsync packet based on M_SKIP_FIREWALL 2342 * flag. This is XXX. 2343 */ 2344 if (m->m_flags & M_SKIP_FIREWALL) 2345 ip_output(m, NULL, NULL, 0, NULL, NULL); 2346 else if (ip_output(m, NULL, NULL, IP_RAWOUTPUT, &sc->sc_imo, 2347 NULL) == 0) 2348 V_pfsyncstats.pfsyncs_opackets++; 2349 else 2350 V_pfsyncstats.pfsyncs_oerrors++; 2351 } 2352 } 2353 CURVNET_RESTORE(); 2354 NET_EPOCH_EXIT(et); 2355 } 2356 2357 static int 2358 pfsync_multicast_setup(struct pfsync_softc *sc, struct ifnet *ifp, 2359 struct in_mfilter *imf) 2360 { 2361 struct ip_moptions *imo = &sc->sc_imo; 2362 int error; 2363 2364 if (!(ifp->if_flags & IFF_MULTICAST)) 2365 return (EADDRNOTAVAIL); 2366 2367 imo->imo_multicast_vif = -1; 2368 2369 if ((error = in_joingroup(ifp, &sc->sc_sync_peer, NULL, 2370 &imf->imf_inm)) != 0) 2371 return (error); 2372 2373 ip_mfilter_init(&imo->imo_head); 2374 ip_mfilter_insert(&imo->imo_head, imf); 2375 imo->imo_multicast_ifp = ifp; 2376 imo->imo_multicast_ttl = PFSYNC_DFLTTL; 2377 imo->imo_multicast_loop = 0; 2378 2379 return (0); 2380 } 2381 2382 static void 2383 pfsync_multicast_cleanup(struct pfsync_softc *sc) 2384 { 2385 struct ip_moptions *imo = &sc->sc_imo; 2386 struct in_mfilter *imf; 2387 2388 while ((imf = ip_mfilter_first(&imo->imo_head)) != NULL) { 2389 ip_mfilter_remove(&imo->imo_head, imf); 2390 in_leavegroup(imf->imf_inm, NULL); 2391 ip_mfilter_free(imf); 2392 } 2393 imo->imo_multicast_ifp = NULL; 2394 } 2395 2396 void 2397 pfsync_detach_ifnet(struct ifnet *ifp) 2398 { 2399 struct pfsync_softc *sc = V_pfsyncif; 2400 2401 if (sc == NULL) 2402 return; 2403 2404 PFSYNC_LOCK(sc); 2405 2406 if (sc->sc_sync_if == ifp) { 2407 /* We don't need mutlicast cleanup here, because the interface 2408 * is going away. We do need to ensure we don't try to do 2409 * cleanup later. 2410 */ 2411 ip_mfilter_init(&sc->sc_imo.imo_head); 2412 sc->sc_imo.imo_multicast_ifp = NULL; 2413 sc->sc_sync_if = NULL; 2414 } 2415 2416 PFSYNC_UNLOCK(sc); 2417 } 2418 2419 #ifdef INET 2420 extern struct domain inetdomain; 2421 static struct protosw in_pfsync_protosw = { 2422 .pr_type = SOCK_RAW, 2423 .pr_domain = &inetdomain, 2424 .pr_protocol = IPPROTO_PFSYNC, 2425 .pr_flags = PR_ATOMIC|PR_ADDR, 2426 .pr_input = pfsync_input, 2427 .pr_output = rip_output, 2428 .pr_ctloutput = rip_ctloutput, 2429 .pr_usrreqs = &rip_usrreqs 2430 }; 2431 #endif 2432 2433 static void 2434 pfsync_pointers_init() 2435 { 2436 2437 PF_RULES_WLOCK(); 2438 V_pfsync_state_import_ptr = pfsync_state_import; 2439 V_pfsync_insert_state_ptr = pfsync_insert_state; 2440 V_pfsync_update_state_ptr = pfsync_update_state; 2441 V_pfsync_delete_state_ptr = pfsync_delete_state; 2442 V_pfsync_clear_states_ptr = pfsync_clear_states; 2443 V_pfsync_defer_ptr = pfsync_defer; 2444 PF_RULES_WUNLOCK(); 2445 } 2446 2447 static void 2448 pfsync_pointers_uninit() 2449 { 2450 2451 PF_RULES_WLOCK(); 2452 V_pfsync_state_import_ptr = NULL; 2453 V_pfsync_insert_state_ptr = NULL; 2454 V_pfsync_update_state_ptr = NULL; 2455 V_pfsync_delete_state_ptr = NULL; 2456 V_pfsync_clear_states_ptr = NULL; 2457 V_pfsync_defer_ptr = NULL; 2458 PF_RULES_WUNLOCK(); 2459 } 2460 2461 static void 2462 vnet_pfsync_init(const void *unused __unused) 2463 { 2464 int error; 2465 2466 V_pfsync_cloner = if_clone_simple(pfsyncname, 2467 pfsync_clone_create, pfsync_clone_destroy, 1); 2468 error = swi_add(NULL, pfsyncname, pfsyncintr, V_pfsyncif, 2469 SWI_NET, INTR_MPSAFE, &V_pfsync_swi_cookie); 2470 if (error) { 2471 if_clone_detach(V_pfsync_cloner); 2472 log(LOG_INFO, "swi_add() failed in %s\n", __func__); 2473 } 2474 2475 pfsync_pointers_init(); 2476 } 2477 VNET_SYSINIT(vnet_pfsync_init, SI_SUB_PROTO_FIREWALL, SI_ORDER_ANY, 2478 vnet_pfsync_init, NULL); 2479 2480 static void 2481 vnet_pfsync_uninit(const void *unused __unused) 2482 { 2483 2484 pfsync_pointers_uninit(); 2485 2486 if_clone_detach(V_pfsync_cloner); 2487 swi_remove(V_pfsync_swi_cookie); 2488 } 2489 2490 VNET_SYSUNINIT(vnet_pfsync_uninit, SI_SUB_PROTO_FIREWALL, SI_ORDER_FOURTH, 2491 vnet_pfsync_uninit, NULL); 2492 2493 static int 2494 pfsync_init() 2495 { 2496 #ifdef INET 2497 int error; 2498 2499 pfsync_detach_ifnet_ptr = pfsync_detach_ifnet; 2500 2501 error = pf_proto_register(PF_INET, &in_pfsync_protosw); 2502 if (error) 2503 return (error); 2504 error = ipproto_register(IPPROTO_PFSYNC); 2505 if (error) { 2506 pf_proto_unregister(PF_INET, IPPROTO_PFSYNC, SOCK_RAW); 2507 return (error); 2508 } 2509 #endif 2510 2511 return (0); 2512 } 2513 2514 static void 2515 pfsync_uninit() 2516 { 2517 pfsync_detach_ifnet_ptr = NULL; 2518 2519 #ifdef INET 2520 ipproto_unregister(IPPROTO_PFSYNC); 2521 pf_proto_unregister(PF_INET, IPPROTO_PFSYNC, SOCK_RAW); 2522 #endif 2523 } 2524 2525 static int 2526 pfsync_modevent(module_t mod, int type, void *data) 2527 { 2528 int error = 0; 2529 2530 switch (type) { 2531 case MOD_LOAD: 2532 error = pfsync_init(); 2533 break; 2534 case MOD_UNLOAD: 2535 pfsync_uninit(); 2536 break; 2537 default: 2538 error = EINVAL; 2539 break; 2540 } 2541 2542 return (error); 2543 } 2544 2545 static moduledata_t pfsync_mod = { 2546 pfsyncname, 2547 pfsync_modevent, 2548 0 2549 }; 2550 2551 #define PFSYNC_MODVER 1 2552 2553 /* Stay on FIREWALL as we depend on pf being initialized and on inetdomain. */ 2554 DECLARE_MODULE(pfsync, pfsync_mod, SI_SUB_PROTO_FIREWALL, SI_ORDER_ANY); 2555 MODULE_VERSION(pfsync, PFSYNC_MODVER); 2556 MODULE_DEPEND(pfsync, pf, PF_MODVER, PF_MODVER, PF_MODVER); 2557