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 #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 static int 457 pfsync_state_import(struct pfsync_state *sp, u_int8_t flags) 458 { 459 struct pfsync_softc *sc = V_pfsyncif; 460 #ifndef __NO_STRICT_ALIGNMENT 461 struct pfsync_state_key key[2]; 462 #endif 463 struct pfsync_state_key *kw, *ks; 464 struct pf_state *st = NULL; 465 struct pf_state_key *skw = NULL, *sks = NULL; 466 struct pf_krule *r = NULL; 467 struct pfi_kkif *kif; 468 int error; 469 470 PF_RULES_RASSERT(); 471 472 if (sp->creatorid == 0) { 473 if (V_pf_status.debug >= PF_DEBUG_MISC) 474 printf("%s: invalid creator id: %08x\n", __func__, 475 ntohl(sp->creatorid)); 476 return (EINVAL); 477 } 478 479 if ((kif = pfi_kkif_find(sp->ifname)) == NULL) { 480 if (V_pf_status.debug >= PF_DEBUG_MISC) 481 printf("%s: unknown interface: %s\n", __func__, 482 sp->ifname); 483 if (flags & PFSYNC_SI_IOCTL) 484 return (EINVAL); 485 return (0); /* skip this state */ 486 } 487 488 /* 489 * If the ruleset checksums match or the state is coming from the ioctl, 490 * it's safe to associate the state with the rule of that number. 491 */ 492 if (sp->rule != htonl(-1) && sp->anchor == htonl(-1) && 493 (flags & (PFSYNC_SI_IOCTL | PFSYNC_SI_CKSUM)) && ntohl(sp->rule) < 494 pf_main_ruleset.rules[PF_RULESET_FILTER].active.rcount) 495 r = pf_main_ruleset.rules[ 496 PF_RULESET_FILTER].active.ptr_array[ntohl(sp->rule)]; 497 else 498 r = &V_pf_default_rule; 499 500 if ((r->max_states && 501 counter_u64_fetch(r->states_cur) >= r->max_states)) 502 goto cleanup; 503 504 /* 505 * XXXGL: consider M_WAITOK in ioctl path after. 506 */ 507 if ((st = uma_zalloc(V_pf_state_z, M_NOWAIT | M_ZERO)) == NULL) 508 goto cleanup; 509 510 for (int i = 0; i < 2; i++) { 511 st->packets[i] = counter_u64_alloc(M_NOWAIT); 512 st->bytes[i] = counter_u64_alloc(M_NOWAIT); 513 if (st->packets[i] == NULL || st->bytes[i] == NULL) 514 goto cleanup; 515 } 516 517 if ((skw = uma_zalloc(V_pf_state_key_z, M_NOWAIT)) == NULL) 518 goto cleanup; 519 520 #ifndef __NO_STRICT_ALIGNMENT 521 bcopy(&sp->key, key, sizeof(struct pfsync_state_key) * 2); 522 kw = &key[PF_SK_WIRE]; 523 ks = &key[PF_SK_STACK]; 524 #else 525 kw = &sp->key[PF_SK_WIRE]; 526 ks = &sp->key[PF_SK_STACK]; 527 #endif 528 529 if (PF_ANEQ(&kw->addr[0], &ks->addr[0], sp->af) || 530 PF_ANEQ(&kw->addr[1], &ks->addr[1], sp->af) || 531 kw->port[0] != ks->port[0] || 532 kw->port[1] != ks->port[1]) { 533 sks = uma_zalloc(V_pf_state_key_z, M_NOWAIT); 534 if (sks == NULL) 535 goto cleanup; 536 } else 537 sks = skw; 538 539 /* allocate memory for scrub info */ 540 if (pfsync_alloc_scrub_memory(&sp->src, &st->src) || 541 pfsync_alloc_scrub_memory(&sp->dst, &st->dst)) 542 goto cleanup; 543 544 /* Copy to state key(s). */ 545 skw->addr[0] = kw->addr[0]; 546 skw->addr[1] = kw->addr[1]; 547 skw->port[0] = kw->port[0]; 548 skw->port[1] = kw->port[1]; 549 skw->proto = sp->proto; 550 skw->af = sp->af; 551 if (sks != skw) { 552 sks->addr[0] = ks->addr[0]; 553 sks->addr[1] = ks->addr[1]; 554 sks->port[0] = ks->port[0]; 555 sks->port[1] = ks->port[1]; 556 sks->proto = sp->proto; 557 sks->af = sp->af; 558 } 559 560 /* copy to state */ 561 bcopy(&sp->rt_addr, &st->rt_addr, sizeof(st->rt_addr)); 562 st->creation = time_uptime - ntohl(sp->creation); 563 st->expire = time_uptime; 564 if (sp->expire) { 565 uint32_t timeout; 566 567 timeout = r->timeout[sp->timeout]; 568 if (!timeout) 569 timeout = V_pf_default_rule.timeout[sp->timeout]; 570 571 /* sp->expire may have been adaptively scaled by export. */ 572 st->expire -= timeout - ntohl(sp->expire); 573 } 574 575 st->direction = sp->direction; 576 st->log = sp->log; 577 st->timeout = sp->timeout; 578 st->state_flags = sp->state_flags; 579 580 st->id = sp->id; 581 st->creatorid = sp->creatorid; 582 pf_state_peer_ntoh(&sp->src, &st->src); 583 pf_state_peer_ntoh(&sp->dst, &st->dst); 584 585 st->rule.ptr = r; 586 st->nat_rule.ptr = NULL; 587 st->anchor.ptr = NULL; 588 st->rt_kif = NULL; 589 590 st->pfsync_time = time_uptime; 591 st->sync_state = PFSYNC_S_NONE; 592 593 if (!(flags & PFSYNC_SI_IOCTL)) 594 st->state_flags |= PFSTATE_NOSYNC; 595 596 if ((error = pf_state_insert(kif, skw, sks, st)) != 0) 597 goto cleanup_state; 598 599 /* XXX when we have nat_rule/anchors, use STATE_INC_COUNTERS */ 600 counter_u64_add(r->states_cur, 1); 601 counter_u64_add(r->states_tot, 1); 602 603 if (!(flags & PFSYNC_SI_IOCTL)) { 604 st->state_flags &= ~PFSTATE_NOSYNC; 605 if (st->state_flags & PFSTATE_ACK) { 606 pfsync_q_ins(st, PFSYNC_S_IACK, true); 607 pfsync_push_all(sc); 608 } 609 } 610 st->state_flags &= ~PFSTATE_ACK; 611 PF_STATE_UNLOCK(st); 612 613 return (0); 614 615 cleanup: 616 error = ENOMEM; 617 if (skw == sks) 618 sks = NULL; 619 if (skw != NULL) 620 uma_zfree(V_pf_state_key_z, skw); 621 if (sks != NULL) 622 uma_zfree(V_pf_state_key_z, sks); 623 624 cleanup_state: /* pf_state_insert() frees the state keys. */ 625 if (st) { 626 for (int i = 0; i < 2; i++) { 627 if (st->packets[i] != NULL) 628 counter_u64_free(st->packets[i]); 629 if (st->bytes[i] != NULL) 630 counter_u64_free(st->bytes[i]); 631 } 632 if (st->dst.scrub) 633 uma_zfree(V_pf_state_scrub_z, st->dst.scrub); 634 if (st->src.scrub) 635 uma_zfree(V_pf_state_scrub_z, st->src.scrub); 636 uma_zfree(V_pf_state_z, st); 637 } 638 return (error); 639 } 640 641 static int 642 pfsync_input(struct mbuf **mp, int *offp __unused, int proto __unused) 643 { 644 struct pfsync_softc *sc = V_pfsyncif; 645 struct pfsync_pkt pkt; 646 struct mbuf *m = *mp; 647 struct ip *ip = mtod(m, struct ip *); 648 struct pfsync_header *ph; 649 struct pfsync_subheader subh; 650 651 int offset, len; 652 int rv; 653 uint16_t count; 654 655 PF_RULES_RLOCK_TRACKER; 656 657 *mp = NULL; 658 V_pfsyncstats.pfsyncs_ipackets++; 659 660 /* Verify that we have a sync interface configured. */ 661 if (!sc || !sc->sc_sync_if || !V_pf_status.running || 662 (sc->sc_ifp->if_drv_flags & IFF_DRV_RUNNING) == 0) 663 goto done; 664 665 /* verify that the packet came in on the right interface */ 666 if (sc->sc_sync_if != m->m_pkthdr.rcvif) { 667 V_pfsyncstats.pfsyncs_badif++; 668 goto done; 669 } 670 671 if_inc_counter(sc->sc_ifp, IFCOUNTER_IPACKETS, 1); 672 if_inc_counter(sc->sc_ifp, IFCOUNTER_IBYTES, m->m_pkthdr.len); 673 /* verify that the IP TTL is 255. */ 674 if (ip->ip_ttl != PFSYNC_DFLTTL) { 675 V_pfsyncstats.pfsyncs_badttl++; 676 goto done; 677 } 678 679 offset = ip->ip_hl << 2; 680 if (m->m_pkthdr.len < offset + sizeof(*ph)) { 681 V_pfsyncstats.pfsyncs_hdrops++; 682 goto done; 683 } 684 685 if (offset + sizeof(*ph) > m->m_len) { 686 if (m_pullup(m, offset + sizeof(*ph)) == NULL) { 687 V_pfsyncstats.pfsyncs_hdrops++; 688 return (IPPROTO_DONE); 689 } 690 ip = mtod(m, struct ip *); 691 } 692 ph = (struct pfsync_header *)((char *)ip + offset); 693 694 /* verify the version */ 695 if (ph->version != PFSYNC_VERSION) { 696 V_pfsyncstats.pfsyncs_badver++; 697 goto done; 698 } 699 700 len = ntohs(ph->len) + offset; 701 if (m->m_pkthdr.len < len) { 702 V_pfsyncstats.pfsyncs_badlen++; 703 goto done; 704 } 705 706 /* Cheaper to grab this now than having to mess with mbufs later */ 707 pkt.ip = ip; 708 pkt.src = ip->ip_src; 709 pkt.flags = 0; 710 711 /* 712 * Trusting pf_chksum during packet processing, as well as seeking 713 * in interface name tree, require holding PF_RULES_RLOCK(). 714 */ 715 PF_RULES_RLOCK(); 716 if (!bcmp(&ph->pfcksum, &V_pf_status.pf_chksum, PF_MD5_DIGEST_LENGTH)) 717 pkt.flags |= PFSYNC_SI_CKSUM; 718 719 offset += sizeof(*ph); 720 while (offset <= len - sizeof(subh)) { 721 m_copydata(m, offset, sizeof(subh), (caddr_t)&subh); 722 offset += sizeof(subh); 723 724 if (subh.action >= PFSYNC_ACT_MAX) { 725 V_pfsyncstats.pfsyncs_badact++; 726 PF_RULES_RUNLOCK(); 727 goto done; 728 } 729 730 count = ntohs(subh.count); 731 V_pfsyncstats.pfsyncs_iacts[subh.action] += count; 732 rv = (*pfsync_acts[subh.action])(&pkt, m, offset, count); 733 if (rv == -1) { 734 PF_RULES_RUNLOCK(); 735 return (IPPROTO_DONE); 736 } 737 738 offset += rv; 739 } 740 PF_RULES_RUNLOCK(); 741 742 done: 743 m_freem(m); 744 return (IPPROTO_DONE); 745 } 746 747 static int 748 pfsync_in_clr(struct pfsync_pkt *pkt, struct mbuf *m, int offset, int count) 749 { 750 struct pfsync_clr *clr; 751 struct mbuf *mp; 752 int len = sizeof(*clr) * count; 753 int i, offp; 754 u_int32_t creatorid; 755 756 mp = m_pulldown(m, offset, len, &offp); 757 if (mp == NULL) { 758 V_pfsyncstats.pfsyncs_badlen++; 759 return (-1); 760 } 761 clr = (struct pfsync_clr *)(mp->m_data + offp); 762 763 for (i = 0; i < count; i++) { 764 creatorid = clr[i].creatorid; 765 766 if (clr[i].ifname[0] != '\0' && 767 pfi_kkif_find(clr[i].ifname) == NULL) 768 continue; 769 770 for (int i = 0; i <= pf_hashmask; i++) { 771 struct pf_idhash *ih = &V_pf_idhash[i]; 772 struct pf_state *s; 773 relock: 774 PF_HASHROW_LOCK(ih); 775 LIST_FOREACH(s, &ih->states, entry) { 776 if (s->creatorid == creatorid) { 777 s->state_flags |= PFSTATE_NOSYNC; 778 pf_unlink_state(s, PF_ENTER_LOCKED); 779 goto relock; 780 } 781 } 782 PF_HASHROW_UNLOCK(ih); 783 } 784 } 785 786 return (len); 787 } 788 789 static int 790 pfsync_in_ins(struct pfsync_pkt *pkt, struct mbuf *m, int offset, int count) 791 { 792 struct mbuf *mp; 793 struct pfsync_state *sa, *sp; 794 int len = sizeof(*sp) * count; 795 int i, offp; 796 797 mp = m_pulldown(m, offset, len, &offp); 798 if (mp == NULL) { 799 V_pfsyncstats.pfsyncs_badlen++; 800 return (-1); 801 } 802 sa = (struct pfsync_state *)(mp->m_data + offp); 803 804 for (i = 0; i < count; i++) { 805 sp = &sa[i]; 806 807 /* Check for invalid values. */ 808 if (sp->timeout >= PFTM_MAX || 809 sp->src.state > PF_TCPS_PROXY_DST || 810 sp->dst.state > PF_TCPS_PROXY_DST || 811 sp->direction > PF_OUT || 812 (sp->af != AF_INET && sp->af != AF_INET6)) { 813 if (V_pf_status.debug >= PF_DEBUG_MISC) 814 printf("%s: invalid value\n", __func__); 815 V_pfsyncstats.pfsyncs_badval++; 816 continue; 817 } 818 819 if (pfsync_state_import(sp, pkt->flags) == ENOMEM) 820 /* Drop out, but process the rest of the actions. */ 821 break; 822 } 823 824 return (len); 825 } 826 827 static int 828 pfsync_in_iack(struct pfsync_pkt *pkt, struct mbuf *m, int offset, int count) 829 { 830 struct pfsync_ins_ack *ia, *iaa; 831 struct pf_state *st; 832 833 struct mbuf *mp; 834 int len = count * sizeof(*ia); 835 int offp, i; 836 837 mp = m_pulldown(m, offset, len, &offp); 838 if (mp == NULL) { 839 V_pfsyncstats.pfsyncs_badlen++; 840 return (-1); 841 } 842 iaa = (struct pfsync_ins_ack *)(mp->m_data + offp); 843 844 for (i = 0; i < count; i++) { 845 ia = &iaa[i]; 846 847 st = pf_find_state_byid(ia->id, ia->creatorid); 848 if (st == NULL) 849 continue; 850 851 if (st->state_flags & PFSTATE_ACK) { 852 pfsync_undefer_state(st, 0); 853 } 854 PF_STATE_UNLOCK(st); 855 } 856 /* 857 * XXX this is not yet implemented, but we know the size of the 858 * message so we can skip it. 859 */ 860 861 return (count * sizeof(struct pfsync_ins_ack)); 862 } 863 864 static int 865 pfsync_upd_tcp(struct pf_state *st, struct pfsync_state_peer *src, 866 struct pfsync_state_peer *dst) 867 { 868 int sync = 0; 869 870 PF_STATE_LOCK_ASSERT(st); 871 872 /* 873 * The state should never go backwards except 874 * for syn-proxy states. Neither should the 875 * sequence window slide backwards. 876 */ 877 if ((st->src.state > src->state && 878 (st->src.state < PF_TCPS_PROXY_SRC || 879 src->state >= PF_TCPS_PROXY_SRC)) || 880 881 (st->src.state == src->state && 882 SEQ_GT(st->src.seqlo, ntohl(src->seqlo)))) 883 sync++; 884 else 885 pf_state_peer_ntoh(src, &st->src); 886 887 if ((st->dst.state > dst->state) || 888 889 (st->dst.state >= TCPS_SYN_SENT && 890 SEQ_GT(st->dst.seqlo, ntohl(dst->seqlo)))) 891 sync++; 892 else 893 pf_state_peer_ntoh(dst, &st->dst); 894 895 return (sync); 896 } 897 898 static int 899 pfsync_in_upd(struct pfsync_pkt *pkt, struct mbuf *m, int offset, int count) 900 { 901 struct pfsync_softc *sc = V_pfsyncif; 902 struct pfsync_state *sa, *sp; 903 struct pf_state *st; 904 int sync; 905 906 struct mbuf *mp; 907 int len = count * sizeof(*sp); 908 int offp, i; 909 910 mp = m_pulldown(m, offset, len, &offp); 911 if (mp == NULL) { 912 V_pfsyncstats.pfsyncs_badlen++; 913 return (-1); 914 } 915 sa = (struct pfsync_state *)(mp->m_data + offp); 916 917 for (i = 0; i < count; i++) { 918 sp = &sa[i]; 919 920 /* check for invalid values */ 921 if (sp->timeout >= PFTM_MAX || 922 sp->src.state > PF_TCPS_PROXY_DST || 923 sp->dst.state > PF_TCPS_PROXY_DST) { 924 if (V_pf_status.debug >= PF_DEBUG_MISC) { 925 printf("pfsync_input: PFSYNC_ACT_UPD: " 926 "invalid value\n"); 927 } 928 V_pfsyncstats.pfsyncs_badval++; 929 continue; 930 } 931 932 st = pf_find_state_byid(sp->id, sp->creatorid); 933 if (st == NULL) { 934 /* insert the update */ 935 if (pfsync_state_import(sp, pkt->flags)) 936 V_pfsyncstats.pfsyncs_badstate++; 937 continue; 938 } 939 940 if (st->state_flags & PFSTATE_ACK) { 941 pfsync_undefer_state(st, 1); 942 } 943 944 if (st->key[PF_SK_WIRE]->proto == IPPROTO_TCP) 945 sync = pfsync_upd_tcp(st, &sp->src, &sp->dst); 946 else { 947 sync = 0; 948 949 /* 950 * Non-TCP protocol state machine always go 951 * forwards 952 */ 953 if (st->src.state > sp->src.state) 954 sync++; 955 else 956 pf_state_peer_ntoh(&sp->src, &st->src); 957 if (st->dst.state > sp->dst.state) 958 sync++; 959 else 960 pf_state_peer_ntoh(&sp->dst, &st->dst); 961 } 962 if (sync < 2) { 963 pfsync_alloc_scrub_memory(&sp->dst, &st->dst); 964 pf_state_peer_ntoh(&sp->dst, &st->dst); 965 st->expire = time_uptime; 966 st->timeout = sp->timeout; 967 } 968 st->pfsync_time = time_uptime; 969 970 if (sync) { 971 V_pfsyncstats.pfsyncs_stale++; 972 973 pfsync_update_state(st); 974 PF_STATE_UNLOCK(st); 975 pfsync_push_all(sc); 976 continue; 977 } 978 PF_STATE_UNLOCK(st); 979 } 980 981 return (len); 982 } 983 984 static int 985 pfsync_in_upd_c(struct pfsync_pkt *pkt, struct mbuf *m, int offset, int count) 986 { 987 struct pfsync_softc *sc = V_pfsyncif; 988 struct pfsync_upd_c *ua, *up; 989 struct pf_state *st; 990 int len = count * sizeof(*up); 991 int sync; 992 struct mbuf *mp; 993 int offp, i; 994 995 mp = m_pulldown(m, offset, len, &offp); 996 if (mp == NULL) { 997 V_pfsyncstats.pfsyncs_badlen++; 998 return (-1); 999 } 1000 ua = (struct pfsync_upd_c *)(mp->m_data + offp); 1001 1002 for (i = 0; i < count; i++) { 1003 up = &ua[i]; 1004 1005 /* check for invalid values */ 1006 if (up->timeout >= PFTM_MAX || 1007 up->src.state > PF_TCPS_PROXY_DST || 1008 up->dst.state > PF_TCPS_PROXY_DST) { 1009 if (V_pf_status.debug >= PF_DEBUG_MISC) { 1010 printf("pfsync_input: " 1011 "PFSYNC_ACT_UPD_C: " 1012 "invalid value\n"); 1013 } 1014 V_pfsyncstats.pfsyncs_badval++; 1015 continue; 1016 } 1017 1018 st = pf_find_state_byid(up->id, up->creatorid); 1019 if (st == NULL) { 1020 /* We don't have this state. Ask for it. */ 1021 PFSYNC_BUCKET_LOCK(&sc->sc_buckets[0]); 1022 pfsync_request_update(up->creatorid, up->id); 1023 PFSYNC_BUCKET_UNLOCK(&sc->sc_buckets[0]); 1024 continue; 1025 } 1026 1027 if (st->state_flags & PFSTATE_ACK) { 1028 pfsync_undefer_state(st, 1); 1029 } 1030 1031 if (st->key[PF_SK_WIRE]->proto == IPPROTO_TCP) 1032 sync = pfsync_upd_tcp(st, &up->src, &up->dst); 1033 else { 1034 sync = 0; 1035 1036 /* 1037 * Non-TCP protocol state machine always go 1038 * forwards 1039 */ 1040 if (st->src.state > up->src.state) 1041 sync++; 1042 else 1043 pf_state_peer_ntoh(&up->src, &st->src); 1044 if (st->dst.state > up->dst.state) 1045 sync++; 1046 else 1047 pf_state_peer_ntoh(&up->dst, &st->dst); 1048 } 1049 if (sync < 2) { 1050 pfsync_alloc_scrub_memory(&up->dst, &st->dst); 1051 pf_state_peer_ntoh(&up->dst, &st->dst); 1052 st->expire = time_uptime; 1053 st->timeout = up->timeout; 1054 } 1055 st->pfsync_time = time_uptime; 1056 1057 if (sync) { 1058 V_pfsyncstats.pfsyncs_stale++; 1059 1060 pfsync_update_state(st); 1061 PF_STATE_UNLOCK(st); 1062 pfsync_push_all(sc); 1063 continue; 1064 } 1065 PF_STATE_UNLOCK(st); 1066 } 1067 1068 return (len); 1069 } 1070 1071 static int 1072 pfsync_in_ureq(struct pfsync_pkt *pkt, struct mbuf *m, int offset, int count) 1073 { 1074 struct pfsync_upd_req *ur, *ura; 1075 struct mbuf *mp; 1076 int len = count * sizeof(*ur); 1077 int i, offp; 1078 1079 struct pf_state *st; 1080 1081 mp = m_pulldown(m, offset, len, &offp); 1082 if (mp == NULL) { 1083 V_pfsyncstats.pfsyncs_badlen++; 1084 return (-1); 1085 } 1086 ura = (struct pfsync_upd_req *)(mp->m_data + offp); 1087 1088 for (i = 0; i < count; i++) { 1089 ur = &ura[i]; 1090 1091 if (ur->id == 0 && ur->creatorid == 0) 1092 pfsync_bulk_start(); 1093 else { 1094 st = pf_find_state_byid(ur->id, ur->creatorid); 1095 if (st == NULL) { 1096 V_pfsyncstats.pfsyncs_badstate++; 1097 continue; 1098 } 1099 if (st->state_flags & PFSTATE_NOSYNC) { 1100 PF_STATE_UNLOCK(st); 1101 continue; 1102 } 1103 1104 pfsync_update_state_req(st); 1105 PF_STATE_UNLOCK(st); 1106 } 1107 } 1108 1109 return (len); 1110 } 1111 1112 static int 1113 pfsync_in_del(struct pfsync_pkt *pkt, struct mbuf *m, int offset, int count) 1114 { 1115 struct mbuf *mp; 1116 struct pfsync_state *sa, *sp; 1117 struct pf_state *st; 1118 int len = count * sizeof(*sp); 1119 int offp, i; 1120 1121 mp = m_pulldown(m, offset, len, &offp); 1122 if (mp == NULL) { 1123 V_pfsyncstats.pfsyncs_badlen++; 1124 return (-1); 1125 } 1126 sa = (struct pfsync_state *)(mp->m_data + offp); 1127 1128 for (i = 0; i < count; i++) { 1129 sp = &sa[i]; 1130 1131 st = pf_find_state_byid(sp->id, sp->creatorid); 1132 if (st == NULL) { 1133 V_pfsyncstats.pfsyncs_badstate++; 1134 continue; 1135 } 1136 st->state_flags |= PFSTATE_NOSYNC; 1137 pf_unlink_state(st, PF_ENTER_LOCKED); 1138 } 1139 1140 return (len); 1141 } 1142 1143 static int 1144 pfsync_in_del_c(struct pfsync_pkt *pkt, struct mbuf *m, int offset, int count) 1145 { 1146 struct mbuf *mp; 1147 struct pfsync_del_c *sa, *sp; 1148 struct pf_state *st; 1149 int len = count * sizeof(*sp); 1150 int offp, i; 1151 1152 mp = m_pulldown(m, offset, len, &offp); 1153 if (mp == NULL) { 1154 V_pfsyncstats.pfsyncs_badlen++; 1155 return (-1); 1156 } 1157 sa = (struct pfsync_del_c *)(mp->m_data + offp); 1158 1159 for (i = 0; i < count; i++) { 1160 sp = &sa[i]; 1161 1162 st = pf_find_state_byid(sp->id, sp->creatorid); 1163 if (st == NULL) { 1164 V_pfsyncstats.pfsyncs_badstate++; 1165 continue; 1166 } 1167 1168 st->state_flags |= PFSTATE_NOSYNC; 1169 pf_unlink_state(st, PF_ENTER_LOCKED); 1170 } 1171 1172 return (len); 1173 } 1174 1175 static int 1176 pfsync_in_bus(struct pfsync_pkt *pkt, struct mbuf *m, int offset, int count) 1177 { 1178 struct pfsync_softc *sc = V_pfsyncif; 1179 struct pfsync_bus *bus; 1180 struct mbuf *mp; 1181 int len = count * sizeof(*bus); 1182 int offp; 1183 1184 PFSYNC_BLOCK(sc); 1185 1186 /* If we're not waiting for a bulk update, who cares. */ 1187 if (sc->sc_ureq_sent == 0) { 1188 PFSYNC_BUNLOCK(sc); 1189 return (len); 1190 } 1191 1192 mp = m_pulldown(m, offset, len, &offp); 1193 if (mp == NULL) { 1194 PFSYNC_BUNLOCK(sc); 1195 V_pfsyncstats.pfsyncs_badlen++; 1196 return (-1); 1197 } 1198 bus = (struct pfsync_bus *)(mp->m_data + offp); 1199 1200 switch (bus->status) { 1201 case PFSYNC_BUS_START: 1202 callout_reset(&sc->sc_bulkfail_tmo, 4 * hz + 1203 V_pf_limits[PF_LIMIT_STATES].limit / 1204 ((sc->sc_ifp->if_mtu - PFSYNC_MINPKT) / 1205 sizeof(struct pfsync_state)), 1206 pfsync_bulk_fail, sc); 1207 if (V_pf_status.debug >= PF_DEBUG_MISC) 1208 printf("pfsync: received bulk update start\n"); 1209 break; 1210 1211 case PFSYNC_BUS_END: 1212 if (time_uptime - ntohl(bus->endtime) >= 1213 sc->sc_ureq_sent) { 1214 /* that's it, we're happy */ 1215 sc->sc_ureq_sent = 0; 1216 sc->sc_bulk_tries = 0; 1217 callout_stop(&sc->sc_bulkfail_tmo); 1218 if (!(sc->sc_flags & PFSYNCF_OK) && carp_demote_adj_p) 1219 (*carp_demote_adj_p)(-V_pfsync_carp_adj, 1220 "pfsync bulk done"); 1221 sc->sc_flags |= PFSYNCF_OK; 1222 if (V_pf_status.debug >= PF_DEBUG_MISC) 1223 printf("pfsync: received valid " 1224 "bulk update end\n"); 1225 } else { 1226 if (V_pf_status.debug >= PF_DEBUG_MISC) 1227 printf("pfsync: received invalid " 1228 "bulk update end: bad timestamp\n"); 1229 } 1230 break; 1231 } 1232 PFSYNC_BUNLOCK(sc); 1233 1234 return (len); 1235 } 1236 1237 static int 1238 pfsync_in_tdb(struct pfsync_pkt *pkt, struct mbuf *m, int offset, int count) 1239 { 1240 int len = count * sizeof(struct pfsync_tdb); 1241 1242 #if defined(IPSEC) 1243 struct pfsync_tdb *tp; 1244 struct mbuf *mp; 1245 int offp; 1246 int i; 1247 int s; 1248 1249 mp = m_pulldown(m, offset, len, &offp); 1250 if (mp == NULL) { 1251 V_pfsyncstats.pfsyncs_badlen++; 1252 return (-1); 1253 } 1254 tp = (struct pfsync_tdb *)(mp->m_data + offp); 1255 1256 for (i = 0; i < count; i++) 1257 pfsync_update_net_tdb(&tp[i]); 1258 #endif 1259 1260 return (len); 1261 } 1262 1263 #if defined(IPSEC) 1264 /* Update an in-kernel tdb. Silently fail if no tdb is found. */ 1265 static void 1266 pfsync_update_net_tdb(struct pfsync_tdb *pt) 1267 { 1268 struct tdb *tdb; 1269 int s; 1270 1271 /* check for invalid values */ 1272 if (ntohl(pt->spi) <= SPI_RESERVED_MAX || 1273 (pt->dst.sa.sa_family != AF_INET && 1274 pt->dst.sa.sa_family != AF_INET6)) 1275 goto bad; 1276 1277 tdb = gettdb(pt->spi, &pt->dst, pt->sproto); 1278 if (tdb) { 1279 pt->rpl = ntohl(pt->rpl); 1280 pt->cur_bytes = (unsigned long long)be64toh(pt->cur_bytes); 1281 1282 /* Neither replay nor byte counter should ever decrease. */ 1283 if (pt->rpl < tdb->tdb_rpl || 1284 pt->cur_bytes < tdb->tdb_cur_bytes) { 1285 goto bad; 1286 } 1287 1288 tdb->tdb_rpl = pt->rpl; 1289 tdb->tdb_cur_bytes = pt->cur_bytes; 1290 } 1291 return; 1292 1293 bad: 1294 if (V_pf_status.debug >= PF_DEBUG_MISC) 1295 printf("pfsync_insert: PFSYNC_ACT_TDB_UPD: " 1296 "invalid value\n"); 1297 V_pfsyncstats.pfsyncs_badstate++; 1298 return; 1299 } 1300 #endif 1301 1302 static int 1303 pfsync_in_eof(struct pfsync_pkt *pkt, struct mbuf *m, int offset, int count) 1304 { 1305 /* check if we are at the right place in the packet */ 1306 if (offset != m->m_pkthdr.len) 1307 V_pfsyncstats.pfsyncs_badlen++; 1308 1309 /* we're done. free and let the caller return */ 1310 m_freem(m); 1311 return (-1); 1312 } 1313 1314 static int 1315 pfsync_in_error(struct pfsync_pkt *pkt, struct mbuf *m, int offset, int count) 1316 { 1317 V_pfsyncstats.pfsyncs_badact++; 1318 1319 m_freem(m); 1320 return (-1); 1321 } 1322 1323 static int 1324 pfsyncoutput(struct ifnet *ifp, struct mbuf *m, const struct sockaddr *dst, 1325 struct route *rt) 1326 { 1327 m_freem(m); 1328 return (0); 1329 } 1330 1331 /* ARGSUSED */ 1332 static int 1333 pfsyncioctl(struct ifnet *ifp, u_long cmd, caddr_t data) 1334 { 1335 struct pfsync_softc *sc = ifp->if_softc; 1336 struct ifreq *ifr = (struct ifreq *)data; 1337 struct pfsyncreq pfsyncr; 1338 int error; 1339 int c; 1340 1341 switch (cmd) { 1342 case SIOCSIFFLAGS: 1343 PFSYNC_LOCK(sc); 1344 if (ifp->if_flags & IFF_UP) { 1345 ifp->if_drv_flags |= IFF_DRV_RUNNING; 1346 PFSYNC_UNLOCK(sc); 1347 pfsync_pointers_init(); 1348 } else { 1349 ifp->if_drv_flags &= ~IFF_DRV_RUNNING; 1350 PFSYNC_UNLOCK(sc); 1351 pfsync_pointers_uninit(); 1352 } 1353 break; 1354 case SIOCSIFMTU: 1355 if (!sc->sc_sync_if || 1356 ifr->ifr_mtu <= PFSYNC_MINPKT || 1357 ifr->ifr_mtu > sc->sc_sync_if->if_mtu) 1358 return (EINVAL); 1359 if (ifr->ifr_mtu < ifp->if_mtu) { 1360 for (c = 0; c < pfsync_buckets; c++) { 1361 PFSYNC_BUCKET_LOCK(&sc->sc_buckets[c]); 1362 if (sc->sc_buckets[c].b_len > PFSYNC_MINPKT) 1363 pfsync_sendout(1, c); 1364 PFSYNC_BUCKET_UNLOCK(&sc->sc_buckets[c]); 1365 } 1366 } 1367 ifp->if_mtu = ifr->ifr_mtu; 1368 break; 1369 case SIOCGETPFSYNC: 1370 bzero(&pfsyncr, sizeof(pfsyncr)); 1371 PFSYNC_LOCK(sc); 1372 if (sc->sc_sync_if) { 1373 strlcpy(pfsyncr.pfsyncr_syncdev, 1374 sc->sc_sync_if->if_xname, IFNAMSIZ); 1375 } 1376 pfsyncr.pfsyncr_syncpeer = sc->sc_sync_peer; 1377 pfsyncr.pfsyncr_maxupdates = sc->sc_maxupdates; 1378 pfsyncr.pfsyncr_defer = (PFSYNCF_DEFER == 1379 (sc->sc_flags & PFSYNCF_DEFER)); 1380 PFSYNC_UNLOCK(sc); 1381 return (copyout(&pfsyncr, ifr_data_get_ptr(ifr), 1382 sizeof(pfsyncr))); 1383 1384 case SIOCSETPFSYNC: 1385 { 1386 struct in_mfilter *imf = NULL; 1387 struct ifnet *sifp; 1388 struct ip *ip; 1389 1390 if ((error = priv_check(curthread, PRIV_NETINET_PF)) != 0) 1391 return (error); 1392 if ((error = copyin(ifr_data_get_ptr(ifr), &pfsyncr, 1393 sizeof(pfsyncr)))) 1394 return (error); 1395 1396 if (pfsyncr.pfsyncr_maxupdates > 255) 1397 return (EINVAL); 1398 1399 if (pfsyncr.pfsyncr_syncdev[0] == 0) 1400 sifp = NULL; 1401 else if ((sifp = ifunit_ref(pfsyncr.pfsyncr_syncdev)) == NULL) 1402 return (EINVAL); 1403 1404 if (sifp != NULL && ( 1405 pfsyncr.pfsyncr_syncpeer.s_addr == 0 || 1406 pfsyncr.pfsyncr_syncpeer.s_addr == 1407 htonl(INADDR_PFSYNC_GROUP))) 1408 imf = ip_mfilter_alloc(M_WAITOK, 0, 0); 1409 1410 PFSYNC_LOCK(sc); 1411 if (pfsyncr.pfsyncr_syncpeer.s_addr == 0) 1412 sc->sc_sync_peer.s_addr = htonl(INADDR_PFSYNC_GROUP); 1413 else 1414 sc->sc_sync_peer.s_addr = 1415 pfsyncr.pfsyncr_syncpeer.s_addr; 1416 1417 sc->sc_maxupdates = pfsyncr.pfsyncr_maxupdates; 1418 if (pfsyncr.pfsyncr_defer) { 1419 sc->sc_flags |= PFSYNCF_DEFER; 1420 V_pfsync_defer_ptr = pfsync_defer; 1421 } else { 1422 sc->sc_flags &= ~PFSYNCF_DEFER; 1423 V_pfsync_defer_ptr = NULL; 1424 } 1425 1426 if (sifp == NULL) { 1427 if (sc->sc_sync_if) 1428 if_rele(sc->sc_sync_if); 1429 sc->sc_sync_if = NULL; 1430 pfsync_multicast_cleanup(sc); 1431 PFSYNC_UNLOCK(sc); 1432 break; 1433 } 1434 1435 for (c = 0; c < pfsync_buckets; c++) { 1436 PFSYNC_BUCKET_LOCK(&sc->sc_buckets[c]); 1437 if (sc->sc_buckets[c].b_len > PFSYNC_MINPKT && 1438 (sifp->if_mtu < sc->sc_ifp->if_mtu || 1439 (sc->sc_sync_if != NULL && 1440 sifp->if_mtu < sc->sc_sync_if->if_mtu) || 1441 sifp->if_mtu < MCLBYTES - sizeof(struct ip))) 1442 pfsync_sendout(1, c); 1443 PFSYNC_BUCKET_UNLOCK(&sc->sc_buckets[c]); 1444 } 1445 1446 pfsync_multicast_cleanup(sc); 1447 1448 if (sc->sc_sync_peer.s_addr == htonl(INADDR_PFSYNC_GROUP)) { 1449 error = pfsync_multicast_setup(sc, sifp, imf); 1450 if (error) { 1451 if_rele(sifp); 1452 ip_mfilter_free(imf); 1453 PFSYNC_UNLOCK(sc); 1454 return (error); 1455 } 1456 } 1457 if (sc->sc_sync_if) 1458 if_rele(sc->sc_sync_if); 1459 sc->sc_sync_if = sifp; 1460 1461 ip = &sc->sc_template; 1462 bzero(ip, sizeof(*ip)); 1463 ip->ip_v = IPVERSION; 1464 ip->ip_hl = sizeof(sc->sc_template) >> 2; 1465 ip->ip_tos = IPTOS_LOWDELAY; 1466 /* len and id are set later. */ 1467 ip->ip_off = htons(IP_DF); 1468 ip->ip_ttl = PFSYNC_DFLTTL; 1469 ip->ip_p = IPPROTO_PFSYNC; 1470 ip->ip_src.s_addr = INADDR_ANY; 1471 ip->ip_dst.s_addr = sc->sc_sync_peer.s_addr; 1472 1473 /* Request a full state table update. */ 1474 if ((sc->sc_flags & PFSYNCF_OK) && carp_demote_adj_p) 1475 (*carp_demote_adj_p)(V_pfsync_carp_adj, 1476 "pfsync bulk start"); 1477 sc->sc_flags &= ~PFSYNCF_OK; 1478 if (V_pf_status.debug >= PF_DEBUG_MISC) 1479 printf("pfsync: requesting bulk update\n"); 1480 PFSYNC_UNLOCK(sc); 1481 PFSYNC_BUCKET_LOCK(&sc->sc_buckets[0]); 1482 pfsync_request_update(0, 0); 1483 PFSYNC_BUCKET_UNLOCK(&sc->sc_buckets[0]); 1484 PFSYNC_BLOCK(sc); 1485 sc->sc_ureq_sent = time_uptime; 1486 callout_reset(&sc->sc_bulkfail_tmo, 5 * hz, pfsync_bulk_fail, 1487 sc); 1488 PFSYNC_BUNLOCK(sc); 1489 1490 break; 1491 } 1492 default: 1493 return (ENOTTY); 1494 } 1495 1496 return (0); 1497 } 1498 1499 static void 1500 pfsync_out_state(struct pf_state *st, void *buf) 1501 { 1502 struct pfsync_state *sp = buf; 1503 1504 pfsync_state_export(sp, st); 1505 } 1506 1507 static void 1508 pfsync_out_iack(struct pf_state *st, void *buf) 1509 { 1510 struct pfsync_ins_ack *iack = buf; 1511 1512 iack->id = st->id; 1513 iack->creatorid = st->creatorid; 1514 } 1515 1516 static void 1517 pfsync_out_upd_c(struct pf_state *st, void *buf) 1518 { 1519 struct pfsync_upd_c *up = buf; 1520 1521 bzero(up, sizeof(*up)); 1522 up->id = st->id; 1523 pf_state_peer_hton(&st->src, &up->src); 1524 pf_state_peer_hton(&st->dst, &up->dst); 1525 up->creatorid = st->creatorid; 1526 up->timeout = st->timeout; 1527 } 1528 1529 static void 1530 pfsync_out_del(struct pf_state *st, void *buf) 1531 { 1532 struct pfsync_del_c *dp = buf; 1533 1534 dp->id = st->id; 1535 dp->creatorid = st->creatorid; 1536 st->state_flags |= PFSTATE_NOSYNC; 1537 } 1538 1539 static void 1540 pfsync_drop(struct pfsync_softc *sc) 1541 { 1542 struct pf_state *st, *next; 1543 struct pfsync_upd_req_item *ur; 1544 struct pfsync_bucket *b; 1545 int c, q; 1546 1547 for (c = 0; c < pfsync_buckets; c++) { 1548 b = &sc->sc_buckets[c]; 1549 for (q = 0; q < PFSYNC_S_COUNT; q++) { 1550 if (TAILQ_EMPTY(&b->b_qs[q])) 1551 continue; 1552 1553 TAILQ_FOREACH_SAFE(st, &b->b_qs[q], sync_list, next) { 1554 KASSERT(st->sync_state == q, 1555 ("%s: st->sync_state == q", 1556 __func__)); 1557 st->sync_state = PFSYNC_S_NONE; 1558 pf_release_state(st); 1559 } 1560 TAILQ_INIT(&b->b_qs[q]); 1561 } 1562 1563 while ((ur = TAILQ_FIRST(&b->b_upd_req_list)) != NULL) { 1564 TAILQ_REMOVE(&b->b_upd_req_list, ur, ur_entry); 1565 free(ur, M_PFSYNC); 1566 } 1567 1568 b->b_len = PFSYNC_MINPKT; 1569 b->b_plus = NULL; 1570 } 1571 } 1572 1573 static void 1574 pfsync_sendout(int schedswi, int c) 1575 { 1576 struct pfsync_softc *sc = V_pfsyncif; 1577 struct ifnet *ifp = sc->sc_ifp; 1578 struct mbuf *m; 1579 struct ip *ip; 1580 struct pfsync_header *ph; 1581 struct pfsync_subheader *subh; 1582 struct pf_state *st, *st_next; 1583 struct pfsync_upd_req_item *ur; 1584 struct pfsync_bucket *b = &sc->sc_buckets[c]; 1585 int offset; 1586 int q, count = 0; 1587 1588 KASSERT(sc != NULL, ("%s: null sc", __func__)); 1589 KASSERT(b->b_len > PFSYNC_MINPKT, 1590 ("%s: sc_len %zu", __func__, b->b_len)); 1591 PFSYNC_BUCKET_LOCK_ASSERT(b); 1592 1593 if (ifp->if_bpf == NULL && sc->sc_sync_if == NULL) { 1594 pfsync_drop(sc); 1595 return; 1596 } 1597 1598 m = m_get2(max_linkhdr + b->b_len, M_NOWAIT, MT_DATA, M_PKTHDR); 1599 if (m == NULL) { 1600 if_inc_counter(sc->sc_ifp, IFCOUNTER_OERRORS, 1); 1601 V_pfsyncstats.pfsyncs_onomem++; 1602 return; 1603 } 1604 m->m_data += max_linkhdr; 1605 m->m_len = m->m_pkthdr.len = b->b_len; 1606 1607 /* build the ip header */ 1608 ip = (struct ip *)m->m_data; 1609 bcopy(&sc->sc_template, ip, sizeof(*ip)); 1610 offset = sizeof(*ip); 1611 1612 ip->ip_len = htons(m->m_pkthdr.len); 1613 ip_fillid(ip); 1614 1615 /* build the pfsync header */ 1616 ph = (struct pfsync_header *)(m->m_data + offset); 1617 bzero(ph, sizeof(*ph)); 1618 offset += sizeof(*ph); 1619 1620 ph->version = PFSYNC_VERSION; 1621 ph->len = htons(b->b_len - sizeof(*ip)); 1622 bcopy(V_pf_status.pf_chksum, ph->pfcksum, PF_MD5_DIGEST_LENGTH); 1623 1624 /* walk the queues */ 1625 for (q = 0; q < PFSYNC_S_COUNT; q++) { 1626 if (TAILQ_EMPTY(&b->b_qs[q])) 1627 continue; 1628 1629 subh = (struct pfsync_subheader *)(m->m_data + offset); 1630 offset += sizeof(*subh); 1631 1632 count = 0; 1633 TAILQ_FOREACH_SAFE(st, &b->b_qs[q], sync_list, st_next) { 1634 KASSERT(st->sync_state == q, 1635 ("%s: st->sync_state == q", 1636 __func__)); 1637 /* 1638 * XXXGL: some of write methods do unlocked reads 1639 * of state data :( 1640 */ 1641 pfsync_qs[q].write(st, m->m_data + offset); 1642 offset += pfsync_qs[q].len; 1643 st->sync_state = PFSYNC_S_NONE; 1644 pf_release_state(st); 1645 count++; 1646 } 1647 TAILQ_INIT(&b->b_qs[q]); 1648 1649 bzero(subh, sizeof(*subh)); 1650 subh->action = pfsync_qs[q].action; 1651 subh->count = htons(count); 1652 V_pfsyncstats.pfsyncs_oacts[pfsync_qs[q].action] += count; 1653 } 1654 1655 if (!TAILQ_EMPTY(&b->b_upd_req_list)) { 1656 subh = (struct pfsync_subheader *)(m->m_data + offset); 1657 offset += sizeof(*subh); 1658 1659 count = 0; 1660 while ((ur = TAILQ_FIRST(&b->b_upd_req_list)) != NULL) { 1661 TAILQ_REMOVE(&b->b_upd_req_list, ur, ur_entry); 1662 1663 bcopy(&ur->ur_msg, m->m_data + offset, 1664 sizeof(ur->ur_msg)); 1665 offset += sizeof(ur->ur_msg); 1666 free(ur, M_PFSYNC); 1667 count++; 1668 } 1669 1670 bzero(subh, sizeof(*subh)); 1671 subh->action = PFSYNC_ACT_UPD_REQ; 1672 subh->count = htons(count); 1673 V_pfsyncstats.pfsyncs_oacts[PFSYNC_ACT_UPD_REQ] += count; 1674 } 1675 1676 /* has someone built a custom region for us to add? */ 1677 if (b->b_plus != NULL) { 1678 bcopy(b->b_plus, m->m_data + offset, b->b_pluslen); 1679 offset += b->b_pluslen; 1680 1681 b->b_plus = NULL; 1682 } 1683 1684 subh = (struct pfsync_subheader *)(m->m_data + offset); 1685 offset += sizeof(*subh); 1686 1687 bzero(subh, sizeof(*subh)); 1688 subh->action = PFSYNC_ACT_EOF; 1689 subh->count = htons(1); 1690 V_pfsyncstats.pfsyncs_oacts[PFSYNC_ACT_EOF]++; 1691 1692 /* we're done, let's put it on the wire */ 1693 if (ifp->if_bpf) { 1694 m->m_data += sizeof(*ip); 1695 m->m_len = m->m_pkthdr.len = b->b_len - sizeof(*ip); 1696 BPF_MTAP(ifp, m); 1697 m->m_data -= sizeof(*ip); 1698 m->m_len = m->m_pkthdr.len = b->b_len; 1699 } 1700 1701 if (sc->sc_sync_if == NULL) { 1702 b->b_len = PFSYNC_MINPKT; 1703 m_freem(m); 1704 return; 1705 } 1706 1707 if_inc_counter(sc->sc_ifp, IFCOUNTER_OPACKETS, 1); 1708 if_inc_counter(sc->sc_ifp, IFCOUNTER_OBYTES, m->m_pkthdr.len); 1709 b->b_len = PFSYNC_MINPKT; 1710 1711 if (!_IF_QFULL(&b->b_snd)) 1712 _IF_ENQUEUE(&b->b_snd, m); 1713 else { 1714 m_freem(m); 1715 if_inc_counter(sc->sc_ifp, IFCOUNTER_OQDROPS, 1); 1716 } 1717 if (schedswi) 1718 swi_sched(V_pfsync_swi_cookie, 0); 1719 } 1720 1721 static void 1722 pfsync_insert_state(struct pf_state *st) 1723 { 1724 struct pfsync_softc *sc = V_pfsyncif; 1725 struct pfsync_bucket *b = pfsync_get_bucket(sc, st); 1726 1727 if (st->state_flags & PFSTATE_NOSYNC) 1728 return; 1729 1730 if ((st->rule.ptr->rule_flag & PFRULE_NOSYNC) || 1731 st->key[PF_SK_WIRE]->proto == IPPROTO_PFSYNC) { 1732 st->state_flags |= PFSTATE_NOSYNC; 1733 return; 1734 } 1735 1736 KASSERT(st->sync_state == PFSYNC_S_NONE, 1737 ("%s: st->sync_state %u", __func__, st->sync_state)); 1738 1739 PFSYNC_BUCKET_LOCK(b); 1740 if (b->b_len == PFSYNC_MINPKT) 1741 callout_reset(&b->b_tmo, 1 * hz, pfsync_timeout, b); 1742 1743 pfsync_q_ins(st, PFSYNC_S_INS, true); 1744 PFSYNC_BUCKET_UNLOCK(b); 1745 1746 st->sync_updates = 0; 1747 } 1748 1749 static int 1750 pfsync_defer(struct pf_state *st, struct mbuf *m) 1751 { 1752 struct pfsync_softc *sc = V_pfsyncif; 1753 struct pfsync_deferral *pd; 1754 struct pfsync_bucket *b = pfsync_get_bucket(sc, st); 1755 1756 if (m->m_flags & (M_BCAST|M_MCAST)) 1757 return (0); 1758 1759 PFSYNC_LOCK(sc); 1760 1761 if (sc == NULL || !(sc->sc_ifp->if_flags & IFF_DRV_RUNNING) || 1762 !(sc->sc_flags & PFSYNCF_DEFER)) { 1763 PFSYNC_UNLOCK(sc); 1764 return (0); 1765 } 1766 1767 if (b->b_deferred >= 128) 1768 pfsync_undefer(TAILQ_FIRST(&b->b_deferrals), 0); 1769 1770 pd = malloc(sizeof(*pd), M_PFSYNC, M_NOWAIT); 1771 if (pd == NULL) 1772 return (0); 1773 b->b_deferred++; 1774 1775 m->m_flags |= M_SKIP_FIREWALL; 1776 st->state_flags |= PFSTATE_ACK; 1777 1778 pd->pd_sc = sc; 1779 pd->pd_refs = 0; 1780 pd->pd_st = st; 1781 pf_ref_state(st); 1782 pd->pd_m = m; 1783 1784 TAILQ_INSERT_TAIL(&b->b_deferrals, pd, pd_entry); 1785 callout_init_mtx(&pd->pd_tmo, &b->b_mtx, CALLOUT_RETURNUNLOCKED); 1786 callout_reset(&pd->pd_tmo, 10, pfsync_defer_tmo, pd); 1787 1788 pfsync_push(b); 1789 1790 return (1); 1791 } 1792 1793 static void 1794 pfsync_undefer(struct pfsync_deferral *pd, int drop) 1795 { 1796 struct pfsync_softc *sc = pd->pd_sc; 1797 struct mbuf *m = pd->pd_m; 1798 struct pf_state *st = pd->pd_st; 1799 struct pfsync_bucket *b = pfsync_get_bucket(sc, st); 1800 1801 PFSYNC_BUCKET_LOCK_ASSERT(b); 1802 1803 TAILQ_REMOVE(&b->b_deferrals, pd, pd_entry); 1804 b->b_deferred--; 1805 pd->pd_st->state_flags &= ~PFSTATE_ACK; /* XXX: locking! */ 1806 free(pd, M_PFSYNC); 1807 pf_release_state(st); 1808 1809 if (drop) 1810 m_freem(m); 1811 else { 1812 _IF_ENQUEUE(&b->b_snd, m); 1813 pfsync_push(b); 1814 } 1815 } 1816 1817 static void 1818 pfsync_defer_tmo(void *arg) 1819 { 1820 struct epoch_tracker et; 1821 struct pfsync_deferral *pd = arg; 1822 struct pfsync_softc *sc = pd->pd_sc; 1823 struct mbuf *m = pd->pd_m; 1824 struct pf_state *st = pd->pd_st; 1825 struct pfsync_bucket *b = pfsync_get_bucket(sc, st); 1826 1827 PFSYNC_BUCKET_LOCK_ASSERT(b); 1828 1829 NET_EPOCH_ENTER(et); 1830 CURVNET_SET(m->m_pkthdr.rcvif->if_vnet); 1831 1832 TAILQ_REMOVE(&b->b_deferrals, pd, pd_entry); 1833 b->b_deferred--; 1834 pd->pd_st->state_flags &= ~PFSTATE_ACK; /* XXX: locking! */ 1835 if (pd->pd_refs == 0) 1836 free(pd, M_PFSYNC); 1837 PFSYNC_UNLOCK(sc); 1838 1839 ip_output(m, NULL, NULL, 0, NULL, NULL); 1840 1841 pf_release_state(st); 1842 1843 CURVNET_RESTORE(); 1844 NET_EPOCH_EXIT(et); 1845 } 1846 1847 static void 1848 pfsync_undefer_state(struct pf_state *st, int drop) 1849 { 1850 struct pfsync_softc *sc = V_pfsyncif; 1851 struct pfsync_deferral *pd; 1852 struct pfsync_bucket *b = pfsync_get_bucket(sc, st); 1853 1854 PFSYNC_BUCKET_LOCK(b); 1855 1856 TAILQ_FOREACH(pd, &b->b_deferrals, pd_entry) { 1857 if (pd->pd_st == st) { 1858 if (callout_stop(&pd->pd_tmo) > 0) 1859 pfsync_undefer(pd, drop); 1860 1861 PFSYNC_BUCKET_UNLOCK(b); 1862 return; 1863 } 1864 } 1865 PFSYNC_BUCKET_UNLOCK(b); 1866 1867 panic("%s: unable to find deferred state", __func__); 1868 } 1869 1870 static struct pfsync_bucket* 1871 pfsync_get_bucket(struct pfsync_softc *sc, struct pf_state *st) 1872 { 1873 int c = PF_IDHASH(st) % pfsync_buckets; 1874 return &sc->sc_buckets[c]; 1875 } 1876 1877 static void 1878 pfsync_update_state(struct pf_state *st) 1879 { 1880 struct pfsync_softc *sc = V_pfsyncif; 1881 bool sync = false, ref = true; 1882 struct pfsync_bucket *b = pfsync_get_bucket(sc, st); 1883 1884 PF_STATE_LOCK_ASSERT(st); 1885 PFSYNC_BUCKET_LOCK(b); 1886 1887 if (st->state_flags & PFSTATE_ACK) 1888 pfsync_undefer_state(st, 0); 1889 if (st->state_flags & PFSTATE_NOSYNC) { 1890 if (st->sync_state != PFSYNC_S_NONE) 1891 pfsync_q_del(st, true, b); 1892 PFSYNC_BUCKET_UNLOCK(b); 1893 return; 1894 } 1895 1896 if (b->b_len == PFSYNC_MINPKT) 1897 callout_reset(&b->b_tmo, 1 * hz, pfsync_timeout, b); 1898 1899 switch (st->sync_state) { 1900 case PFSYNC_S_UPD_C: 1901 case PFSYNC_S_UPD: 1902 case PFSYNC_S_INS: 1903 /* we're already handling it */ 1904 1905 if (st->key[PF_SK_WIRE]->proto == IPPROTO_TCP) { 1906 st->sync_updates++; 1907 if (st->sync_updates >= sc->sc_maxupdates) 1908 sync = true; 1909 } 1910 break; 1911 1912 case PFSYNC_S_IACK: 1913 pfsync_q_del(st, false, b); 1914 ref = false; 1915 /* FALLTHROUGH */ 1916 1917 case PFSYNC_S_NONE: 1918 pfsync_q_ins(st, PFSYNC_S_UPD_C, ref); 1919 st->sync_updates = 0; 1920 break; 1921 1922 default: 1923 panic("%s: unexpected sync state %d", __func__, st->sync_state); 1924 } 1925 1926 if (sync || (time_uptime - st->pfsync_time) < 2) 1927 pfsync_push(b); 1928 1929 PFSYNC_BUCKET_UNLOCK(b); 1930 } 1931 1932 static void 1933 pfsync_request_update(u_int32_t creatorid, u_int64_t id) 1934 { 1935 struct pfsync_softc *sc = V_pfsyncif; 1936 struct pfsync_bucket *b = &sc->sc_buckets[0]; 1937 struct pfsync_upd_req_item *item; 1938 size_t nlen = sizeof(struct pfsync_upd_req); 1939 1940 PFSYNC_BUCKET_LOCK_ASSERT(b); 1941 1942 /* 1943 * This code does a bit to prevent multiple update requests for the 1944 * same state being generated. It searches current subheader queue, 1945 * but it doesn't lookup into queue of already packed datagrams. 1946 */ 1947 TAILQ_FOREACH(item, &b->b_upd_req_list, ur_entry) 1948 if (item->ur_msg.id == id && 1949 item->ur_msg.creatorid == creatorid) 1950 return; 1951 1952 item = malloc(sizeof(*item), M_PFSYNC, M_NOWAIT); 1953 if (item == NULL) 1954 return; /* XXX stats */ 1955 1956 item->ur_msg.id = id; 1957 item->ur_msg.creatorid = creatorid; 1958 1959 if (TAILQ_EMPTY(&b->b_upd_req_list)) 1960 nlen += sizeof(struct pfsync_subheader); 1961 1962 if (b->b_len + nlen > sc->sc_ifp->if_mtu) { 1963 pfsync_sendout(1, 0); 1964 1965 nlen = sizeof(struct pfsync_subheader) + 1966 sizeof(struct pfsync_upd_req); 1967 } 1968 1969 TAILQ_INSERT_TAIL(&b->b_upd_req_list, item, ur_entry); 1970 b->b_len += nlen; 1971 } 1972 1973 static bool 1974 pfsync_update_state_req(struct pf_state *st) 1975 { 1976 struct pfsync_softc *sc = V_pfsyncif; 1977 bool ref = true, full = false; 1978 struct pfsync_bucket *b = pfsync_get_bucket(sc, st); 1979 1980 PF_STATE_LOCK_ASSERT(st); 1981 PFSYNC_BUCKET_LOCK(b); 1982 1983 if (st->state_flags & PFSTATE_NOSYNC) { 1984 if (st->sync_state != PFSYNC_S_NONE) 1985 pfsync_q_del(st, true, b); 1986 PFSYNC_BUCKET_UNLOCK(b); 1987 return (full); 1988 } 1989 1990 switch (st->sync_state) { 1991 case PFSYNC_S_UPD_C: 1992 case PFSYNC_S_IACK: 1993 pfsync_q_del(st, false, b); 1994 ref = false; 1995 /* FALLTHROUGH */ 1996 1997 case PFSYNC_S_NONE: 1998 pfsync_q_ins(st, PFSYNC_S_UPD, ref); 1999 pfsync_push(b); 2000 break; 2001 2002 case PFSYNC_S_INS: 2003 case PFSYNC_S_UPD: 2004 case PFSYNC_S_DEL: 2005 /* we're already handling it */ 2006 break; 2007 2008 default: 2009 panic("%s: unexpected sync state %d", __func__, st->sync_state); 2010 } 2011 2012 if ((sc->sc_ifp->if_mtu - b->b_len) < sizeof(struct pfsync_state)) 2013 full = true; 2014 2015 PFSYNC_BUCKET_UNLOCK(b); 2016 2017 return (full); 2018 } 2019 2020 static void 2021 pfsync_delete_state(struct pf_state *st) 2022 { 2023 struct pfsync_softc *sc = V_pfsyncif; 2024 struct pfsync_bucket *b = pfsync_get_bucket(sc, st); 2025 bool ref = true; 2026 2027 PFSYNC_BUCKET_LOCK(b); 2028 if (st->state_flags & PFSTATE_ACK) 2029 pfsync_undefer_state(st, 1); 2030 if (st->state_flags & PFSTATE_NOSYNC) { 2031 if (st->sync_state != PFSYNC_S_NONE) 2032 pfsync_q_del(st, true, b); 2033 PFSYNC_BUCKET_UNLOCK(b); 2034 return; 2035 } 2036 2037 if (b->b_len == PFSYNC_MINPKT) 2038 callout_reset(&b->b_tmo, 1 * hz, pfsync_timeout, b); 2039 2040 switch (st->sync_state) { 2041 case PFSYNC_S_INS: 2042 /* We never got to tell the world so just forget about it. */ 2043 pfsync_q_del(st, true, b); 2044 break; 2045 2046 case PFSYNC_S_UPD_C: 2047 case PFSYNC_S_UPD: 2048 case PFSYNC_S_IACK: 2049 pfsync_q_del(st, false, b); 2050 ref = false; 2051 /* FALLTHROUGH */ 2052 2053 case PFSYNC_S_NONE: 2054 pfsync_q_ins(st, PFSYNC_S_DEL, ref); 2055 break; 2056 2057 default: 2058 panic("%s: unexpected sync state %d", __func__, st->sync_state); 2059 } 2060 2061 PFSYNC_BUCKET_UNLOCK(b); 2062 } 2063 2064 static void 2065 pfsync_clear_states(u_int32_t creatorid, const char *ifname) 2066 { 2067 struct { 2068 struct pfsync_subheader subh; 2069 struct pfsync_clr clr; 2070 } __packed r; 2071 2072 bzero(&r, sizeof(r)); 2073 2074 r.subh.action = PFSYNC_ACT_CLR; 2075 r.subh.count = htons(1); 2076 V_pfsyncstats.pfsyncs_oacts[PFSYNC_ACT_CLR]++; 2077 2078 strlcpy(r.clr.ifname, ifname, sizeof(r.clr.ifname)); 2079 r.clr.creatorid = creatorid; 2080 2081 pfsync_send_plus(&r, sizeof(r)); 2082 } 2083 2084 static void 2085 pfsync_q_ins(struct pf_state *st, int q, bool ref) 2086 { 2087 struct pfsync_softc *sc = V_pfsyncif; 2088 size_t nlen = pfsync_qs[q].len; 2089 struct pfsync_bucket *b = pfsync_get_bucket(sc, st); 2090 2091 PFSYNC_BUCKET_LOCK_ASSERT(b); 2092 2093 KASSERT(st->sync_state == PFSYNC_S_NONE, 2094 ("%s: st->sync_state %u", __func__, st->sync_state)); 2095 KASSERT(b->b_len >= PFSYNC_MINPKT, ("pfsync pkt len is too low %zu", 2096 b->b_len)); 2097 2098 if (TAILQ_EMPTY(&b->b_qs[q])) 2099 nlen += sizeof(struct pfsync_subheader); 2100 2101 if (b->b_len + nlen > sc->sc_ifp->if_mtu) { 2102 pfsync_sendout(1, b->b_id); 2103 2104 nlen = sizeof(struct pfsync_subheader) + pfsync_qs[q].len; 2105 } 2106 2107 b->b_len += nlen; 2108 TAILQ_INSERT_TAIL(&b->b_qs[q], st, sync_list); 2109 st->sync_state = q; 2110 if (ref) 2111 pf_ref_state(st); 2112 } 2113 2114 static void 2115 pfsync_q_del(struct pf_state *st, bool unref, struct pfsync_bucket *b) 2116 { 2117 int q = st->sync_state; 2118 2119 PFSYNC_BUCKET_LOCK_ASSERT(b); 2120 KASSERT(st->sync_state != PFSYNC_S_NONE, 2121 ("%s: st->sync_state != PFSYNC_S_NONE", __func__)); 2122 2123 b->b_len -= pfsync_qs[q].len; 2124 TAILQ_REMOVE(&b->b_qs[q], st, sync_list); 2125 st->sync_state = PFSYNC_S_NONE; 2126 if (unref) 2127 pf_release_state(st); 2128 2129 if (TAILQ_EMPTY(&b->b_qs[q])) 2130 b->b_len -= sizeof(struct pfsync_subheader); 2131 } 2132 2133 static void 2134 pfsync_bulk_start(void) 2135 { 2136 struct pfsync_softc *sc = V_pfsyncif; 2137 2138 if (V_pf_status.debug >= PF_DEBUG_MISC) 2139 printf("pfsync: received bulk update request\n"); 2140 2141 PFSYNC_BLOCK(sc); 2142 2143 sc->sc_ureq_received = time_uptime; 2144 sc->sc_bulk_hashid = 0; 2145 sc->sc_bulk_stateid = 0; 2146 pfsync_bulk_status(PFSYNC_BUS_START); 2147 callout_reset(&sc->sc_bulk_tmo, 1, pfsync_bulk_update, sc); 2148 PFSYNC_BUNLOCK(sc); 2149 } 2150 2151 static void 2152 pfsync_bulk_update(void *arg) 2153 { 2154 struct pfsync_softc *sc = arg; 2155 struct pf_state *s; 2156 int i, sent = 0; 2157 2158 PFSYNC_BLOCK_ASSERT(sc); 2159 CURVNET_SET(sc->sc_ifp->if_vnet); 2160 2161 /* 2162 * Start with last state from previous invocation. 2163 * It may had gone, in this case start from the 2164 * hash slot. 2165 */ 2166 s = pf_find_state_byid(sc->sc_bulk_stateid, sc->sc_bulk_creatorid); 2167 2168 if (s != NULL) 2169 i = PF_IDHASH(s); 2170 else 2171 i = sc->sc_bulk_hashid; 2172 2173 for (; i <= pf_hashmask; i++) { 2174 struct pf_idhash *ih = &V_pf_idhash[i]; 2175 2176 if (s != NULL) 2177 PF_HASHROW_ASSERT(ih); 2178 else { 2179 PF_HASHROW_LOCK(ih); 2180 s = LIST_FIRST(&ih->states); 2181 } 2182 2183 for (; s; s = LIST_NEXT(s, entry)) { 2184 if (s->sync_state == PFSYNC_S_NONE && 2185 s->timeout < PFTM_MAX && 2186 s->pfsync_time <= sc->sc_ureq_received) { 2187 if (pfsync_update_state_req(s)) { 2188 /* We've filled a packet. */ 2189 sc->sc_bulk_hashid = i; 2190 sc->sc_bulk_stateid = s->id; 2191 sc->sc_bulk_creatorid = s->creatorid; 2192 PF_HASHROW_UNLOCK(ih); 2193 callout_reset(&sc->sc_bulk_tmo, 1, 2194 pfsync_bulk_update, sc); 2195 goto full; 2196 } 2197 sent++; 2198 } 2199 } 2200 PF_HASHROW_UNLOCK(ih); 2201 } 2202 2203 /* We're done. */ 2204 pfsync_bulk_status(PFSYNC_BUS_END); 2205 full: 2206 CURVNET_RESTORE(); 2207 } 2208 2209 static void 2210 pfsync_bulk_status(u_int8_t status) 2211 { 2212 struct { 2213 struct pfsync_subheader subh; 2214 struct pfsync_bus bus; 2215 } __packed r; 2216 2217 struct pfsync_softc *sc = V_pfsyncif; 2218 2219 bzero(&r, sizeof(r)); 2220 2221 r.subh.action = PFSYNC_ACT_BUS; 2222 r.subh.count = htons(1); 2223 V_pfsyncstats.pfsyncs_oacts[PFSYNC_ACT_BUS]++; 2224 2225 r.bus.creatorid = V_pf_status.hostid; 2226 r.bus.endtime = htonl(time_uptime - sc->sc_ureq_received); 2227 r.bus.status = status; 2228 2229 pfsync_send_plus(&r, sizeof(r)); 2230 } 2231 2232 static void 2233 pfsync_bulk_fail(void *arg) 2234 { 2235 struct pfsync_softc *sc = arg; 2236 struct pfsync_bucket *b = &sc->sc_buckets[0]; 2237 2238 CURVNET_SET(sc->sc_ifp->if_vnet); 2239 2240 PFSYNC_BLOCK_ASSERT(sc); 2241 2242 if (sc->sc_bulk_tries++ < PFSYNC_MAX_BULKTRIES) { 2243 /* Try again */ 2244 callout_reset(&sc->sc_bulkfail_tmo, 5 * hz, 2245 pfsync_bulk_fail, V_pfsyncif); 2246 PFSYNC_BUCKET_LOCK(b); 2247 pfsync_request_update(0, 0); 2248 PFSYNC_BUCKET_UNLOCK(b); 2249 } else { 2250 /* Pretend like the transfer was ok. */ 2251 sc->sc_ureq_sent = 0; 2252 sc->sc_bulk_tries = 0; 2253 PFSYNC_LOCK(sc); 2254 if (!(sc->sc_flags & PFSYNCF_OK) && carp_demote_adj_p) 2255 (*carp_demote_adj_p)(-V_pfsync_carp_adj, 2256 "pfsync bulk fail"); 2257 sc->sc_flags |= PFSYNCF_OK; 2258 PFSYNC_UNLOCK(sc); 2259 if (V_pf_status.debug >= PF_DEBUG_MISC) 2260 printf("pfsync: failed to receive bulk update\n"); 2261 } 2262 2263 CURVNET_RESTORE(); 2264 } 2265 2266 static void 2267 pfsync_send_plus(void *plus, size_t pluslen) 2268 { 2269 struct pfsync_softc *sc = V_pfsyncif; 2270 struct pfsync_bucket *b = &sc->sc_buckets[0]; 2271 2272 PFSYNC_BUCKET_LOCK(b); 2273 2274 if (b->b_len + pluslen > sc->sc_ifp->if_mtu) 2275 pfsync_sendout(1, b->b_id); 2276 2277 b->b_plus = plus; 2278 b->b_len += (b->b_pluslen = pluslen); 2279 2280 pfsync_sendout(1, b->b_id); 2281 PFSYNC_BUCKET_UNLOCK(b); 2282 } 2283 2284 static void 2285 pfsync_timeout(void *arg) 2286 { 2287 struct pfsync_bucket *b = arg; 2288 2289 CURVNET_SET(b->b_sc->sc_ifp->if_vnet); 2290 PFSYNC_BUCKET_LOCK(b); 2291 pfsync_push(b); 2292 PFSYNC_BUCKET_UNLOCK(b); 2293 CURVNET_RESTORE(); 2294 } 2295 2296 static void 2297 pfsync_push(struct pfsync_bucket *b) 2298 { 2299 2300 PFSYNC_BUCKET_LOCK_ASSERT(b); 2301 2302 b->b_flags |= PFSYNCF_BUCKET_PUSH; 2303 swi_sched(V_pfsync_swi_cookie, 0); 2304 } 2305 2306 static void 2307 pfsync_push_all(struct pfsync_softc *sc) 2308 { 2309 int c; 2310 struct pfsync_bucket *b; 2311 2312 for (c = 0; c < pfsync_buckets; c++) { 2313 b = &sc->sc_buckets[c]; 2314 2315 PFSYNC_BUCKET_LOCK(b); 2316 pfsync_push(b); 2317 PFSYNC_BUCKET_UNLOCK(b); 2318 } 2319 } 2320 2321 static void 2322 pfsyncintr(void *arg) 2323 { 2324 struct epoch_tracker et; 2325 struct pfsync_softc *sc = arg; 2326 struct pfsync_bucket *b; 2327 struct mbuf *m, *n; 2328 int c; 2329 2330 NET_EPOCH_ENTER(et); 2331 CURVNET_SET(sc->sc_ifp->if_vnet); 2332 2333 for (c = 0; c < pfsync_buckets; c++) { 2334 b = &sc->sc_buckets[c]; 2335 2336 PFSYNC_BUCKET_LOCK(b); 2337 if ((b->b_flags & PFSYNCF_BUCKET_PUSH) && b->b_len > PFSYNC_MINPKT) { 2338 pfsync_sendout(0, b->b_id); 2339 b->b_flags &= ~PFSYNCF_BUCKET_PUSH; 2340 } 2341 _IF_DEQUEUE_ALL(&b->b_snd, m); 2342 PFSYNC_BUCKET_UNLOCK(b); 2343 2344 for (; m != NULL; m = n) { 2345 n = m->m_nextpkt; 2346 m->m_nextpkt = NULL; 2347 2348 /* 2349 * We distinguish between a deferral packet and our 2350 * own pfsync packet based on M_SKIP_FIREWALL 2351 * flag. This is XXX. 2352 */ 2353 if (m->m_flags & M_SKIP_FIREWALL) 2354 ip_output(m, NULL, NULL, 0, NULL, NULL); 2355 else if (ip_output(m, NULL, NULL, IP_RAWOUTPUT, &sc->sc_imo, 2356 NULL) == 0) 2357 V_pfsyncstats.pfsyncs_opackets++; 2358 else 2359 V_pfsyncstats.pfsyncs_oerrors++; 2360 } 2361 } 2362 CURVNET_RESTORE(); 2363 NET_EPOCH_EXIT(et); 2364 } 2365 2366 static int 2367 pfsync_multicast_setup(struct pfsync_softc *sc, struct ifnet *ifp, 2368 struct in_mfilter *imf) 2369 { 2370 struct ip_moptions *imo = &sc->sc_imo; 2371 int error; 2372 2373 if (!(ifp->if_flags & IFF_MULTICAST)) 2374 return (EADDRNOTAVAIL); 2375 2376 imo->imo_multicast_vif = -1; 2377 2378 if ((error = in_joingroup(ifp, &sc->sc_sync_peer, NULL, 2379 &imf->imf_inm)) != 0) 2380 return (error); 2381 2382 ip_mfilter_init(&imo->imo_head); 2383 ip_mfilter_insert(&imo->imo_head, imf); 2384 imo->imo_multicast_ifp = ifp; 2385 imo->imo_multicast_ttl = PFSYNC_DFLTTL; 2386 imo->imo_multicast_loop = 0; 2387 2388 return (0); 2389 } 2390 2391 static void 2392 pfsync_multicast_cleanup(struct pfsync_softc *sc) 2393 { 2394 struct ip_moptions *imo = &sc->sc_imo; 2395 struct in_mfilter *imf; 2396 2397 while ((imf = ip_mfilter_first(&imo->imo_head)) != NULL) { 2398 ip_mfilter_remove(&imo->imo_head, imf); 2399 in_leavegroup(imf->imf_inm, NULL); 2400 ip_mfilter_free(imf); 2401 } 2402 imo->imo_multicast_ifp = NULL; 2403 } 2404 2405 void 2406 pfsync_detach_ifnet(struct ifnet *ifp) 2407 { 2408 struct pfsync_softc *sc = V_pfsyncif; 2409 2410 if (sc == NULL) 2411 return; 2412 2413 PFSYNC_LOCK(sc); 2414 2415 if (sc->sc_sync_if == ifp) { 2416 /* We don't need mutlicast cleanup here, because the interface 2417 * is going away. We do need to ensure we don't try to do 2418 * cleanup later. 2419 */ 2420 ip_mfilter_init(&sc->sc_imo.imo_head); 2421 sc->sc_imo.imo_multicast_ifp = NULL; 2422 sc->sc_sync_if = NULL; 2423 } 2424 2425 PFSYNC_UNLOCK(sc); 2426 } 2427 2428 #ifdef INET 2429 extern struct domain inetdomain; 2430 static struct protosw in_pfsync_protosw = { 2431 .pr_type = SOCK_RAW, 2432 .pr_domain = &inetdomain, 2433 .pr_protocol = IPPROTO_PFSYNC, 2434 .pr_flags = PR_ATOMIC|PR_ADDR, 2435 .pr_input = pfsync_input, 2436 .pr_output = rip_output, 2437 .pr_ctloutput = rip_ctloutput, 2438 .pr_usrreqs = &rip_usrreqs 2439 }; 2440 #endif 2441 2442 static void 2443 pfsync_pointers_init() 2444 { 2445 2446 PF_RULES_WLOCK(); 2447 V_pfsync_state_import_ptr = pfsync_state_import; 2448 V_pfsync_insert_state_ptr = pfsync_insert_state; 2449 V_pfsync_update_state_ptr = pfsync_update_state; 2450 V_pfsync_delete_state_ptr = pfsync_delete_state; 2451 V_pfsync_clear_states_ptr = pfsync_clear_states; 2452 V_pfsync_defer_ptr = pfsync_defer; 2453 PF_RULES_WUNLOCK(); 2454 } 2455 2456 static void 2457 pfsync_pointers_uninit() 2458 { 2459 2460 PF_RULES_WLOCK(); 2461 V_pfsync_state_import_ptr = NULL; 2462 V_pfsync_insert_state_ptr = NULL; 2463 V_pfsync_update_state_ptr = NULL; 2464 V_pfsync_delete_state_ptr = NULL; 2465 V_pfsync_clear_states_ptr = NULL; 2466 V_pfsync_defer_ptr = NULL; 2467 PF_RULES_WUNLOCK(); 2468 } 2469 2470 static void 2471 vnet_pfsync_init(const void *unused __unused) 2472 { 2473 int error; 2474 2475 V_pfsync_cloner = if_clone_simple(pfsyncname, 2476 pfsync_clone_create, pfsync_clone_destroy, 1); 2477 error = swi_add(NULL, pfsyncname, pfsyncintr, V_pfsyncif, 2478 SWI_NET, INTR_MPSAFE, &V_pfsync_swi_cookie); 2479 if (error) { 2480 if_clone_detach(V_pfsync_cloner); 2481 log(LOG_INFO, "swi_add() failed in %s\n", __func__); 2482 } 2483 2484 pfsync_pointers_init(); 2485 } 2486 VNET_SYSINIT(vnet_pfsync_init, SI_SUB_PROTO_FIREWALL, SI_ORDER_ANY, 2487 vnet_pfsync_init, NULL); 2488 2489 static void 2490 vnet_pfsync_uninit(const void *unused __unused) 2491 { 2492 2493 pfsync_pointers_uninit(); 2494 2495 if_clone_detach(V_pfsync_cloner); 2496 swi_remove(V_pfsync_swi_cookie); 2497 } 2498 2499 VNET_SYSUNINIT(vnet_pfsync_uninit, SI_SUB_PROTO_FIREWALL, SI_ORDER_FOURTH, 2500 vnet_pfsync_uninit, NULL); 2501 2502 static int 2503 pfsync_init() 2504 { 2505 #ifdef INET 2506 int error; 2507 2508 pfsync_detach_ifnet_ptr = pfsync_detach_ifnet; 2509 2510 error = pf_proto_register(PF_INET, &in_pfsync_protosw); 2511 if (error) 2512 return (error); 2513 error = ipproto_register(IPPROTO_PFSYNC); 2514 if (error) { 2515 pf_proto_unregister(PF_INET, IPPROTO_PFSYNC, SOCK_RAW); 2516 return (error); 2517 } 2518 #endif 2519 2520 return (0); 2521 } 2522 2523 static void 2524 pfsync_uninit() 2525 { 2526 pfsync_detach_ifnet_ptr = NULL; 2527 2528 #ifdef INET 2529 ipproto_unregister(IPPROTO_PFSYNC); 2530 pf_proto_unregister(PF_INET, IPPROTO_PFSYNC, SOCK_RAW); 2531 #endif 2532 } 2533 2534 static int 2535 pfsync_modevent(module_t mod, int type, void *data) 2536 { 2537 int error = 0; 2538 2539 switch (type) { 2540 case MOD_LOAD: 2541 error = pfsync_init(); 2542 break; 2543 case MOD_UNLOAD: 2544 pfsync_uninit(); 2545 break; 2546 default: 2547 error = EINVAL; 2548 break; 2549 } 2550 2551 return (error); 2552 } 2553 2554 static moduledata_t pfsync_mod = { 2555 pfsyncname, 2556 pfsync_modevent, 2557 0 2558 }; 2559 2560 #define PFSYNC_MODVER 1 2561 2562 /* Stay on FIREWALL as we depend on pf being initialized and on inetdomain. */ 2563 DECLARE_MODULE(pfsync, pfsync_mod, SI_SUB_PROTO_FIREWALL, SI_ORDER_ANY); 2564 MODULE_VERSION(pfsync, PFSYNC_MODVER); 2565 MODULE_DEPEND(pfsync, pf, PF_MODVER, PF_MODVER, PF_MODVER); 2566