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