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 uint8_t sc_maxupdates; 219 struct ip sc_template; 220 struct mtx sc_mtx; 221 222 /* Queued data */ 223 struct pfsync_bucket *sc_buckets; 224 225 /* Bulk update info */ 226 struct mtx sc_bulk_mtx; 227 uint32_t sc_ureq_sent; 228 int sc_bulk_tries; 229 uint32_t sc_ureq_received; 230 int sc_bulk_hashid; 231 uint64_t sc_bulk_stateid; 232 uint32_t sc_bulk_creatorid; 233 struct callout sc_bulk_tmo; 234 struct callout sc_bulkfail_tmo; 235 }; 236 237 #define PFSYNC_LOCK(sc) mtx_lock(&(sc)->sc_mtx) 238 #define PFSYNC_UNLOCK(sc) mtx_unlock(&(sc)->sc_mtx) 239 #define PFSYNC_LOCK_ASSERT(sc) mtx_assert(&(sc)->sc_mtx, MA_OWNED) 240 241 #define PFSYNC_BUCKET_LOCK(b) mtx_lock(&(b)->b_mtx) 242 #define PFSYNC_BUCKET_UNLOCK(b) mtx_unlock(&(b)->b_mtx) 243 #define PFSYNC_BUCKET_LOCK_ASSERT(b) mtx_assert(&(b)->b_mtx, MA_OWNED) 244 245 #define PFSYNC_BLOCK(sc) mtx_lock(&(sc)->sc_bulk_mtx) 246 #define PFSYNC_BUNLOCK(sc) mtx_unlock(&(sc)->sc_bulk_mtx) 247 #define PFSYNC_BLOCK_ASSERT(sc) mtx_assert(&(sc)->sc_bulk_mtx, MA_OWNED) 248 249 static const char pfsyncname[] = "pfsync"; 250 static MALLOC_DEFINE(M_PFSYNC, pfsyncname, "pfsync(4) data"); 251 VNET_DEFINE_STATIC(struct pfsync_softc *, pfsyncif) = NULL; 252 #define V_pfsyncif VNET(pfsyncif) 253 VNET_DEFINE_STATIC(void *, pfsync_swi_cookie) = NULL; 254 #define V_pfsync_swi_cookie VNET(pfsync_swi_cookie) 255 VNET_DEFINE_STATIC(struct intr_event *, pfsync_swi_ie); 256 #define V_pfsync_swi_ie VNET(pfsync_swi_ie) 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, 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 counter_u64_free(st->packets[i]); 628 counter_u64_free(st->bytes[i]); 629 } 630 if (st->dst.scrub) 631 uma_zfree(V_pf_state_scrub_z, st->dst.scrub); 632 if (st->src.scrub) 633 uma_zfree(V_pf_state_scrub_z, st->src.scrub); 634 uma_zfree(V_pf_state_z, st); 635 } 636 return (error); 637 } 638 639 static int 640 pfsync_input(struct mbuf **mp, int *offp __unused, int proto __unused) 641 { 642 struct pfsync_softc *sc = V_pfsyncif; 643 struct pfsync_pkt pkt; 644 struct mbuf *m = *mp; 645 struct ip *ip = mtod(m, struct ip *); 646 struct pfsync_header *ph; 647 struct pfsync_subheader subh; 648 649 int offset, len; 650 int rv; 651 uint16_t count; 652 653 PF_RULES_RLOCK_TRACKER; 654 655 *mp = NULL; 656 V_pfsyncstats.pfsyncs_ipackets++; 657 658 /* Verify that we have a sync interface configured. */ 659 if (!sc || !sc->sc_sync_if || !V_pf_status.running || 660 (sc->sc_ifp->if_drv_flags & IFF_DRV_RUNNING) == 0) 661 goto done; 662 663 /* verify that the packet came in on the right interface */ 664 if (sc->sc_sync_if != m->m_pkthdr.rcvif) { 665 V_pfsyncstats.pfsyncs_badif++; 666 goto done; 667 } 668 669 if_inc_counter(sc->sc_ifp, IFCOUNTER_IPACKETS, 1); 670 if_inc_counter(sc->sc_ifp, IFCOUNTER_IBYTES, m->m_pkthdr.len); 671 /* verify that the IP TTL is 255. */ 672 if (ip->ip_ttl != PFSYNC_DFLTTL) { 673 V_pfsyncstats.pfsyncs_badttl++; 674 goto done; 675 } 676 677 offset = ip->ip_hl << 2; 678 if (m->m_pkthdr.len < offset + sizeof(*ph)) { 679 V_pfsyncstats.pfsyncs_hdrops++; 680 goto done; 681 } 682 683 if (offset + sizeof(*ph) > m->m_len) { 684 if (m_pullup(m, offset + sizeof(*ph)) == NULL) { 685 V_pfsyncstats.pfsyncs_hdrops++; 686 return (IPPROTO_DONE); 687 } 688 ip = mtod(m, struct ip *); 689 } 690 ph = (struct pfsync_header *)((char *)ip + offset); 691 692 /* verify the version */ 693 if (ph->version != PFSYNC_VERSION) { 694 V_pfsyncstats.pfsyncs_badver++; 695 goto done; 696 } 697 698 len = ntohs(ph->len) + offset; 699 if (m->m_pkthdr.len < len) { 700 V_pfsyncstats.pfsyncs_badlen++; 701 goto done; 702 } 703 704 /* Cheaper to grab this now than having to mess with mbufs later */ 705 pkt.ip = ip; 706 pkt.src = ip->ip_src; 707 pkt.flags = 0; 708 709 /* 710 * Trusting pf_chksum during packet processing, as well as seeking 711 * in interface name tree, require holding PF_RULES_RLOCK(). 712 */ 713 PF_RULES_RLOCK(); 714 if (!bcmp(&ph->pfcksum, &V_pf_status.pf_chksum, PF_MD5_DIGEST_LENGTH)) 715 pkt.flags |= PFSYNC_SI_CKSUM; 716 717 offset += sizeof(*ph); 718 while (offset <= len - sizeof(subh)) { 719 m_copydata(m, offset, sizeof(subh), (caddr_t)&subh); 720 offset += sizeof(subh); 721 722 if (subh.action >= PFSYNC_ACT_MAX) { 723 V_pfsyncstats.pfsyncs_badact++; 724 PF_RULES_RUNLOCK(); 725 goto done; 726 } 727 728 count = ntohs(subh.count); 729 V_pfsyncstats.pfsyncs_iacts[subh.action] += count; 730 rv = (*pfsync_acts[subh.action])(&pkt, m, offset, count); 731 if (rv == -1) { 732 PF_RULES_RUNLOCK(); 733 return (IPPROTO_DONE); 734 } 735 736 offset += rv; 737 } 738 PF_RULES_RUNLOCK(); 739 740 done: 741 m_freem(m); 742 return (IPPROTO_DONE); 743 } 744 745 static int 746 pfsync_in_clr(struct pfsync_pkt *pkt, struct mbuf *m, int offset, int count) 747 { 748 struct pfsync_clr *clr; 749 struct mbuf *mp; 750 int len = sizeof(*clr) * count; 751 int i, offp; 752 u_int32_t creatorid; 753 754 mp = m_pulldown(m, offset, len, &offp); 755 if (mp == NULL) { 756 V_pfsyncstats.pfsyncs_badlen++; 757 return (-1); 758 } 759 clr = (struct pfsync_clr *)(mp->m_data + offp); 760 761 for (i = 0; i < count; i++) { 762 creatorid = clr[i].creatorid; 763 764 if (clr[i].ifname[0] != '\0' && 765 pfi_kkif_find(clr[i].ifname) == NULL) 766 continue; 767 768 for (int i = 0; i <= pf_hashmask; i++) { 769 struct pf_idhash *ih = &V_pf_idhash[i]; 770 struct pf_state *s; 771 relock: 772 PF_HASHROW_LOCK(ih); 773 LIST_FOREACH(s, &ih->states, entry) { 774 if (s->creatorid == creatorid) { 775 s->state_flags |= PFSTATE_NOSYNC; 776 pf_unlink_state(s, PF_ENTER_LOCKED); 777 goto relock; 778 } 779 } 780 PF_HASHROW_UNLOCK(ih); 781 } 782 } 783 784 return (len); 785 } 786 787 static int 788 pfsync_in_ins(struct pfsync_pkt *pkt, struct mbuf *m, int offset, int count) 789 { 790 struct mbuf *mp; 791 struct pfsync_state *sa, *sp; 792 int len = sizeof(*sp) * count; 793 int i, offp; 794 795 mp = m_pulldown(m, offset, len, &offp); 796 if (mp == NULL) { 797 V_pfsyncstats.pfsyncs_badlen++; 798 return (-1); 799 } 800 sa = (struct pfsync_state *)(mp->m_data + offp); 801 802 for (i = 0; i < count; i++) { 803 sp = &sa[i]; 804 805 /* Check for invalid values. */ 806 if (sp->timeout >= PFTM_MAX || 807 sp->src.state > PF_TCPS_PROXY_DST || 808 sp->dst.state > PF_TCPS_PROXY_DST || 809 sp->direction > PF_OUT || 810 (sp->af != AF_INET && sp->af != AF_INET6)) { 811 if (V_pf_status.debug >= PF_DEBUG_MISC) 812 printf("%s: invalid value\n", __func__); 813 V_pfsyncstats.pfsyncs_badval++; 814 continue; 815 } 816 817 if (pfsync_state_import(sp, pkt->flags) == ENOMEM) 818 /* Drop out, but process the rest of the actions. */ 819 break; 820 } 821 822 return (len); 823 } 824 825 static int 826 pfsync_in_iack(struct pfsync_pkt *pkt, struct mbuf *m, int offset, int count) 827 { 828 struct pfsync_ins_ack *ia, *iaa; 829 struct pf_state *st; 830 831 struct mbuf *mp; 832 int len = count * sizeof(*ia); 833 int offp, i; 834 835 mp = m_pulldown(m, offset, len, &offp); 836 if (mp == NULL) { 837 V_pfsyncstats.pfsyncs_badlen++; 838 return (-1); 839 } 840 iaa = (struct pfsync_ins_ack *)(mp->m_data + offp); 841 842 for (i = 0; i < count; i++) { 843 ia = &iaa[i]; 844 845 st = pf_find_state_byid(ia->id, ia->creatorid); 846 if (st == NULL) 847 continue; 848 849 if (st->state_flags & PFSTATE_ACK) { 850 pfsync_undefer_state(st, 0); 851 } 852 PF_STATE_UNLOCK(st); 853 } 854 /* 855 * XXX this is not yet implemented, but we know the size of the 856 * message so we can skip it. 857 */ 858 859 return (count * sizeof(struct pfsync_ins_ack)); 860 } 861 862 static int 863 pfsync_upd_tcp(struct pf_state *st, struct pfsync_state_peer *src, 864 struct pfsync_state_peer *dst) 865 { 866 int sync = 0; 867 868 PF_STATE_LOCK_ASSERT(st); 869 870 /* 871 * The state should never go backwards except 872 * for syn-proxy states. Neither should the 873 * sequence window slide backwards. 874 */ 875 if ((st->src.state > src->state && 876 (st->src.state < PF_TCPS_PROXY_SRC || 877 src->state >= PF_TCPS_PROXY_SRC)) || 878 879 (st->src.state == src->state && 880 SEQ_GT(st->src.seqlo, ntohl(src->seqlo)))) 881 sync++; 882 else 883 pf_state_peer_ntoh(src, &st->src); 884 885 if ((st->dst.state > dst->state) || 886 887 (st->dst.state >= TCPS_SYN_SENT && 888 SEQ_GT(st->dst.seqlo, ntohl(dst->seqlo)))) 889 sync++; 890 else 891 pf_state_peer_ntoh(dst, &st->dst); 892 893 return (sync); 894 } 895 896 static int 897 pfsync_in_upd(struct pfsync_pkt *pkt, struct mbuf *m, int offset, int count) 898 { 899 struct pfsync_softc *sc = V_pfsyncif; 900 struct pfsync_state *sa, *sp; 901 struct pf_state *st; 902 int sync; 903 904 struct mbuf *mp; 905 int len = count * sizeof(*sp); 906 int offp, i; 907 908 mp = m_pulldown(m, offset, len, &offp); 909 if (mp == NULL) { 910 V_pfsyncstats.pfsyncs_badlen++; 911 return (-1); 912 } 913 sa = (struct pfsync_state *)(mp->m_data + offp); 914 915 for (i = 0; i < count; i++) { 916 sp = &sa[i]; 917 918 /* check for invalid values */ 919 if (sp->timeout >= PFTM_MAX || 920 sp->src.state > PF_TCPS_PROXY_DST || 921 sp->dst.state > PF_TCPS_PROXY_DST) { 922 if (V_pf_status.debug >= PF_DEBUG_MISC) { 923 printf("pfsync_input: PFSYNC_ACT_UPD: " 924 "invalid value\n"); 925 } 926 V_pfsyncstats.pfsyncs_badval++; 927 continue; 928 } 929 930 st = pf_find_state_byid(sp->id, sp->creatorid); 931 if (st == NULL) { 932 /* insert the update */ 933 if (pfsync_state_import(sp, pkt->flags)) 934 V_pfsyncstats.pfsyncs_badstate++; 935 continue; 936 } 937 938 if (st->state_flags & PFSTATE_ACK) { 939 pfsync_undefer_state(st, 1); 940 } 941 942 if (st->key[PF_SK_WIRE]->proto == IPPROTO_TCP) 943 sync = pfsync_upd_tcp(st, &sp->src, &sp->dst); 944 else { 945 sync = 0; 946 947 /* 948 * Non-TCP protocol state machine always go 949 * forwards 950 */ 951 if (st->src.state > sp->src.state) 952 sync++; 953 else 954 pf_state_peer_ntoh(&sp->src, &st->src); 955 if (st->dst.state > sp->dst.state) 956 sync++; 957 else 958 pf_state_peer_ntoh(&sp->dst, &st->dst); 959 } 960 if (sync < 2) { 961 pfsync_alloc_scrub_memory(&sp->dst, &st->dst); 962 pf_state_peer_ntoh(&sp->dst, &st->dst); 963 st->expire = time_uptime; 964 st->timeout = sp->timeout; 965 } 966 st->pfsync_time = time_uptime; 967 968 if (sync) { 969 V_pfsyncstats.pfsyncs_stale++; 970 971 pfsync_update_state(st); 972 PF_STATE_UNLOCK(st); 973 pfsync_push_all(sc); 974 continue; 975 } 976 PF_STATE_UNLOCK(st); 977 } 978 979 return (len); 980 } 981 982 static int 983 pfsync_in_upd_c(struct pfsync_pkt *pkt, struct mbuf *m, int offset, int count) 984 { 985 struct pfsync_softc *sc = V_pfsyncif; 986 struct pfsync_upd_c *ua, *up; 987 struct pf_state *st; 988 int len = count * sizeof(*up); 989 int sync; 990 struct mbuf *mp; 991 int offp, i; 992 993 mp = m_pulldown(m, offset, len, &offp); 994 if (mp == NULL) { 995 V_pfsyncstats.pfsyncs_badlen++; 996 return (-1); 997 } 998 ua = (struct pfsync_upd_c *)(mp->m_data + offp); 999 1000 for (i = 0; i < count; i++) { 1001 up = &ua[i]; 1002 1003 /* check for invalid values */ 1004 if (up->timeout >= PFTM_MAX || 1005 up->src.state > PF_TCPS_PROXY_DST || 1006 up->dst.state > PF_TCPS_PROXY_DST) { 1007 if (V_pf_status.debug >= PF_DEBUG_MISC) { 1008 printf("pfsync_input: " 1009 "PFSYNC_ACT_UPD_C: " 1010 "invalid value\n"); 1011 } 1012 V_pfsyncstats.pfsyncs_badval++; 1013 continue; 1014 } 1015 1016 st = pf_find_state_byid(up->id, up->creatorid); 1017 if (st == NULL) { 1018 /* We don't have this state. Ask for it. */ 1019 PFSYNC_BUCKET_LOCK(&sc->sc_buckets[0]); 1020 pfsync_request_update(up->creatorid, up->id); 1021 PFSYNC_BUCKET_UNLOCK(&sc->sc_buckets[0]); 1022 continue; 1023 } 1024 1025 if (st->state_flags & PFSTATE_ACK) { 1026 pfsync_undefer_state(st, 1); 1027 } 1028 1029 if (st->key[PF_SK_WIRE]->proto == IPPROTO_TCP) 1030 sync = pfsync_upd_tcp(st, &up->src, &up->dst); 1031 else { 1032 sync = 0; 1033 1034 /* 1035 * Non-TCP protocol state machine always go 1036 * forwards 1037 */ 1038 if (st->src.state > up->src.state) 1039 sync++; 1040 else 1041 pf_state_peer_ntoh(&up->src, &st->src); 1042 if (st->dst.state > up->dst.state) 1043 sync++; 1044 else 1045 pf_state_peer_ntoh(&up->dst, &st->dst); 1046 } 1047 if (sync < 2) { 1048 pfsync_alloc_scrub_memory(&up->dst, &st->dst); 1049 pf_state_peer_ntoh(&up->dst, &st->dst); 1050 st->expire = time_uptime; 1051 st->timeout = up->timeout; 1052 } 1053 st->pfsync_time = time_uptime; 1054 1055 if (sync) { 1056 V_pfsyncstats.pfsyncs_stale++; 1057 1058 pfsync_update_state(st); 1059 PF_STATE_UNLOCK(st); 1060 pfsync_push_all(sc); 1061 continue; 1062 } 1063 PF_STATE_UNLOCK(st); 1064 } 1065 1066 return (len); 1067 } 1068 1069 static int 1070 pfsync_in_ureq(struct pfsync_pkt *pkt, struct mbuf *m, int offset, int count) 1071 { 1072 struct pfsync_upd_req *ur, *ura; 1073 struct mbuf *mp; 1074 int len = count * sizeof(*ur); 1075 int i, offp; 1076 1077 struct pf_state *st; 1078 1079 mp = m_pulldown(m, offset, len, &offp); 1080 if (mp == NULL) { 1081 V_pfsyncstats.pfsyncs_badlen++; 1082 return (-1); 1083 } 1084 ura = (struct pfsync_upd_req *)(mp->m_data + offp); 1085 1086 for (i = 0; i < count; i++) { 1087 ur = &ura[i]; 1088 1089 if (ur->id == 0 && ur->creatorid == 0) 1090 pfsync_bulk_start(); 1091 else { 1092 st = pf_find_state_byid(ur->id, ur->creatorid); 1093 if (st == NULL) { 1094 V_pfsyncstats.pfsyncs_badstate++; 1095 continue; 1096 } 1097 if (st->state_flags & PFSTATE_NOSYNC) { 1098 PF_STATE_UNLOCK(st); 1099 continue; 1100 } 1101 1102 pfsync_update_state_req(st); 1103 PF_STATE_UNLOCK(st); 1104 } 1105 } 1106 1107 return (len); 1108 } 1109 1110 static int 1111 pfsync_in_del(struct pfsync_pkt *pkt, struct mbuf *m, int offset, int count) 1112 { 1113 struct mbuf *mp; 1114 struct pfsync_state *sa, *sp; 1115 struct pf_state *st; 1116 int len = count * sizeof(*sp); 1117 int offp, i; 1118 1119 mp = m_pulldown(m, offset, len, &offp); 1120 if (mp == NULL) { 1121 V_pfsyncstats.pfsyncs_badlen++; 1122 return (-1); 1123 } 1124 sa = (struct pfsync_state *)(mp->m_data + offp); 1125 1126 for (i = 0; i < count; i++) { 1127 sp = &sa[i]; 1128 1129 st = pf_find_state_byid(sp->id, sp->creatorid); 1130 if (st == NULL) { 1131 V_pfsyncstats.pfsyncs_badstate++; 1132 continue; 1133 } 1134 st->state_flags |= PFSTATE_NOSYNC; 1135 pf_unlink_state(st, PF_ENTER_LOCKED); 1136 } 1137 1138 return (len); 1139 } 1140 1141 static int 1142 pfsync_in_del_c(struct pfsync_pkt *pkt, struct mbuf *m, int offset, int count) 1143 { 1144 struct mbuf *mp; 1145 struct pfsync_del_c *sa, *sp; 1146 struct pf_state *st; 1147 int len = count * sizeof(*sp); 1148 int offp, i; 1149 1150 mp = m_pulldown(m, offset, len, &offp); 1151 if (mp == NULL) { 1152 V_pfsyncstats.pfsyncs_badlen++; 1153 return (-1); 1154 } 1155 sa = (struct pfsync_del_c *)(mp->m_data + offp); 1156 1157 for (i = 0; i < count; i++) { 1158 sp = &sa[i]; 1159 1160 st = pf_find_state_byid(sp->id, sp->creatorid); 1161 if (st == NULL) { 1162 V_pfsyncstats.pfsyncs_badstate++; 1163 continue; 1164 } 1165 1166 st->state_flags |= PFSTATE_NOSYNC; 1167 pf_unlink_state(st, PF_ENTER_LOCKED); 1168 } 1169 1170 return (len); 1171 } 1172 1173 static int 1174 pfsync_in_bus(struct pfsync_pkt *pkt, struct mbuf *m, int offset, int count) 1175 { 1176 struct pfsync_softc *sc = V_pfsyncif; 1177 struct pfsync_bus *bus; 1178 struct mbuf *mp; 1179 int len = count * sizeof(*bus); 1180 int offp; 1181 1182 PFSYNC_BLOCK(sc); 1183 1184 /* If we're not waiting for a bulk update, who cares. */ 1185 if (sc->sc_ureq_sent == 0) { 1186 PFSYNC_BUNLOCK(sc); 1187 return (len); 1188 } 1189 1190 mp = m_pulldown(m, offset, len, &offp); 1191 if (mp == NULL) { 1192 PFSYNC_BUNLOCK(sc); 1193 V_pfsyncstats.pfsyncs_badlen++; 1194 return (-1); 1195 } 1196 bus = (struct pfsync_bus *)(mp->m_data + offp); 1197 1198 switch (bus->status) { 1199 case PFSYNC_BUS_START: 1200 callout_reset(&sc->sc_bulkfail_tmo, 4 * hz + 1201 V_pf_limits[PF_LIMIT_STATES].limit / 1202 ((sc->sc_ifp->if_mtu - PFSYNC_MINPKT) / 1203 sizeof(struct pfsync_state)), 1204 pfsync_bulk_fail, sc); 1205 if (V_pf_status.debug >= PF_DEBUG_MISC) 1206 printf("pfsync: received bulk update start\n"); 1207 break; 1208 1209 case PFSYNC_BUS_END: 1210 if (time_uptime - ntohl(bus->endtime) >= 1211 sc->sc_ureq_sent) { 1212 /* that's it, we're happy */ 1213 sc->sc_ureq_sent = 0; 1214 sc->sc_bulk_tries = 0; 1215 callout_stop(&sc->sc_bulkfail_tmo); 1216 if (!(sc->sc_flags & PFSYNCF_OK) && carp_demote_adj_p) 1217 (*carp_demote_adj_p)(-V_pfsync_carp_adj, 1218 "pfsync bulk done"); 1219 sc->sc_flags |= PFSYNCF_OK; 1220 if (V_pf_status.debug >= PF_DEBUG_MISC) 1221 printf("pfsync: received valid " 1222 "bulk update end\n"); 1223 } else { 1224 if (V_pf_status.debug >= PF_DEBUG_MISC) 1225 printf("pfsync: received invalid " 1226 "bulk update end: bad timestamp\n"); 1227 } 1228 break; 1229 } 1230 PFSYNC_BUNLOCK(sc); 1231 1232 return (len); 1233 } 1234 1235 static int 1236 pfsync_in_tdb(struct pfsync_pkt *pkt, struct mbuf *m, int offset, int count) 1237 { 1238 int len = count * sizeof(struct pfsync_tdb); 1239 1240 #if defined(IPSEC) 1241 struct pfsync_tdb *tp; 1242 struct mbuf *mp; 1243 int offp; 1244 int i; 1245 int s; 1246 1247 mp = m_pulldown(m, offset, len, &offp); 1248 if (mp == NULL) { 1249 V_pfsyncstats.pfsyncs_badlen++; 1250 return (-1); 1251 } 1252 tp = (struct pfsync_tdb *)(mp->m_data + offp); 1253 1254 for (i = 0; i < count; i++) 1255 pfsync_update_net_tdb(&tp[i]); 1256 #endif 1257 1258 return (len); 1259 } 1260 1261 #if defined(IPSEC) 1262 /* Update an in-kernel tdb. Silently fail if no tdb is found. */ 1263 static void 1264 pfsync_update_net_tdb(struct pfsync_tdb *pt) 1265 { 1266 struct tdb *tdb; 1267 int s; 1268 1269 /* check for invalid values */ 1270 if (ntohl(pt->spi) <= SPI_RESERVED_MAX || 1271 (pt->dst.sa.sa_family != AF_INET && 1272 pt->dst.sa.sa_family != AF_INET6)) 1273 goto bad; 1274 1275 tdb = gettdb(pt->spi, &pt->dst, pt->sproto); 1276 if (tdb) { 1277 pt->rpl = ntohl(pt->rpl); 1278 pt->cur_bytes = (unsigned long long)be64toh(pt->cur_bytes); 1279 1280 /* Neither replay nor byte counter should ever decrease. */ 1281 if (pt->rpl < tdb->tdb_rpl || 1282 pt->cur_bytes < tdb->tdb_cur_bytes) { 1283 goto bad; 1284 } 1285 1286 tdb->tdb_rpl = pt->rpl; 1287 tdb->tdb_cur_bytes = pt->cur_bytes; 1288 } 1289 return; 1290 1291 bad: 1292 if (V_pf_status.debug >= PF_DEBUG_MISC) 1293 printf("pfsync_insert: PFSYNC_ACT_TDB_UPD: " 1294 "invalid value\n"); 1295 V_pfsyncstats.pfsyncs_badstate++; 1296 return; 1297 } 1298 #endif 1299 1300 static int 1301 pfsync_in_eof(struct pfsync_pkt *pkt, struct mbuf *m, int offset, int count) 1302 { 1303 /* check if we are at the right place in the packet */ 1304 if (offset != m->m_pkthdr.len) 1305 V_pfsyncstats.pfsyncs_badlen++; 1306 1307 /* we're done. free and let the caller return */ 1308 m_freem(m); 1309 return (-1); 1310 } 1311 1312 static int 1313 pfsync_in_error(struct pfsync_pkt *pkt, struct mbuf *m, int offset, int count) 1314 { 1315 V_pfsyncstats.pfsyncs_badact++; 1316 1317 m_freem(m); 1318 return (-1); 1319 } 1320 1321 static int 1322 pfsyncoutput(struct ifnet *ifp, struct mbuf *m, const struct sockaddr *dst, 1323 struct route *rt) 1324 { 1325 m_freem(m); 1326 return (0); 1327 } 1328 1329 /* ARGSUSED */ 1330 static int 1331 pfsyncioctl(struct ifnet *ifp, u_long cmd, caddr_t data) 1332 { 1333 struct pfsync_softc *sc = ifp->if_softc; 1334 struct ifreq *ifr = (struct ifreq *)data; 1335 struct pfsyncreq pfsyncr; 1336 int error; 1337 int c; 1338 1339 switch (cmd) { 1340 case SIOCSIFFLAGS: 1341 PFSYNC_LOCK(sc); 1342 if (ifp->if_flags & IFF_UP) { 1343 ifp->if_drv_flags |= IFF_DRV_RUNNING; 1344 PFSYNC_UNLOCK(sc); 1345 pfsync_pointers_init(); 1346 } else { 1347 ifp->if_drv_flags &= ~IFF_DRV_RUNNING; 1348 PFSYNC_UNLOCK(sc); 1349 pfsync_pointers_uninit(); 1350 } 1351 break; 1352 case SIOCSIFMTU: 1353 if (!sc->sc_sync_if || 1354 ifr->ifr_mtu <= PFSYNC_MINPKT || 1355 ifr->ifr_mtu > sc->sc_sync_if->if_mtu) 1356 return (EINVAL); 1357 if (ifr->ifr_mtu < ifp->if_mtu) { 1358 for (c = 0; c < pfsync_buckets; c++) { 1359 PFSYNC_BUCKET_LOCK(&sc->sc_buckets[c]); 1360 if (sc->sc_buckets[c].b_len > PFSYNC_MINPKT) 1361 pfsync_sendout(1, c); 1362 PFSYNC_BUCKET_UNLOCK(&sc->sc_buckets[c]); 1363 } 1364 } 1365 ifp->if_mtu = ifr->ifr_mtu; 1366 break; 1367 case SIOCGETPFSYNC: 1368 bzero(&pfsyncr, sizeof(pfsyncr)); 1369 PFSYNC_LOCK(sc); 1370 if (sc->sc_sync_if) { 1371 strlcpy(pfsyncr.pfsyncr_syncdev, 1372 sc->sc_sync_if->if_xname, IFNAMSIZ); 1373 } 1374 pfsyncr.pfsyncr_syncpeer = sc->sc_sync_peer; 1375 pfsyncr.pfsyncr_maxupdates = sc->sc_maxupdates; 1376 pfsyncr.pfsyncr_defer = sc->sc_flags; 1377 PFSYNC_UNLOCK(sc); 1378 return (copyout(&pfsyncr, ifr_data_get_ptr(ifr), 1379 sizeof(pfsyncr))); 1380 1381 case SIOCSETPFSYNC: 1382 { 1383 struct in_mfilter *imf = NULL; 1384 struct ifnet *sifp; 1385 struct ip *ip; 1386 1387 if ((error = priv_check(curthread, PRIV_NETINET_PF)) != 0) 1388 return (error); 1389 if ((error = copyin(ifr_data_get_ptr(ifr), &pfsyncr, 1390 sizeof(pfsyncr)))) 1391 return (error); 1392 1393 if (pfsyncr.pfsyncr_maxupdates > 255) 1394 return (EINVAL); 1395 1396 if (pfsyncr.pfsyncr_syncdev[0] == 0) 1397 sifp = NULL; 1398 else if ((sifp = ifunit_ref(pfsyncr.pfsyncr_syncdev)) == NULL) 1399 return (EINVAL); 1400 1401 if (sifp != NULL && ( 1402 pfsyncr.pfsyncr_syncpeer.s_addr == 0 || 1403 pfsyncr.pfsyncr_syncpeer.s_addr == 1404 htonl(INADDR_PFSYNC_GROUP))) 1405 imf = ip_mfilter_alloc(M_WAITOK, 0, 0); 1406 1407 PFSYNC_LOCK(sc); 1408 if (pfsyncr.pfsyncr_syncpeer.s_addr == 0) 1409 sc->sc_sync_peer.s_addr = htonl(INADDR_PFSYNC_GROUP); 1410 else 1411 sc->sc_sync_peer.s_addr = 1412 pfsyncr.pfsyncr_syncpeer.s_addr; 1413 1414 sc->sc_maxupdates = pfsyncr.pfsyncr_maxupdates; 1415 if (pfsyncr.pfsyncr_defer) { 1416 sc->sc_flags |= PFSYNCF_DEFER; 1417 V_pfsync_defer_ptr = pfsync_defer; 1418 } else { 1419 sc->sc_flags &= ~PFSYNCF_DEFER; 1420 V_pfsync_defer_ptr = NULL; 1421 } 1422 1423 if (sifp == NULL) { 1424 if (sc->sc_sync_if) 1425 if_rele(sc->sc_sync_if); 1426 sc->sc_sync_if = NULL; 1427 pfsync_multicast_cleanup(sc); 1428 PFSYNC_UNLOCK(sc); 1429 break; 1430 } 1431 1432 for (c = 0; c < pfsync_buckets; c++) { 1433 PFSYNC_BUCKET_LOCK(&sc->sc_buckets[c]); 1434 if (sc->sc_buckets[c].b_len > PFSYNC_MINPKT && 1435 (sifp->if_mtu < sc->sc_ifp->if_mtu || 1436 (sc->sc_sync_if != NULL && 1437 sifp->if_mtu < sc->sc_sync_if->if_mtu) || 1438 sifp->if_mtu < MCLBYTES - sizeof(struct ip))) 1439 pfsync_sendout(1, c); 1440 PFSYNC_BUCKET_UNLOCK(&sc->sc_buckets[c]); 1441 } 1442 1443 pfsync_multicast_cleanup(sc); 1444 1445 if (sc->sc_sync_peer.s_addr == htonl(INADDR_PFSYNC_GROUP)) { 1446 error = pfsync_multicast_setup(sc, sifp, imf); 1447 if (error) { 1448 if_rele(sifp); 1449 ip_mfilter_free(imf); 1450 PFSYNC_UNLOCK(sc); 1451 return (error); 1452 } 1453 } 1454 if (sc->sc_sync_if) 1455 if_rele(sc->sc_sync_if); 1456 sc->sc_sync_if = sifp; 1457 1458 ip = &sc->sc_template; 1459 bzero(ip, sizeof(*ip)); 1460 ip->ip_v = IPVERSION; 1461 ip->ip_hl = sizeof(sc->sc_template) >> 2; 1462 ip->ip_tos = IPTOS_LOWDELAY; 1463 /* len and id are set later. */ 1464 ip->ip_off = htons(IP_DF); 1465 ip->ip_ttl = PFSYNC_DFLTTL; 1466 ip->ip_p = IPPROTO_PFSYNC; 1467 ip->ip_src.s_addr = INADDR_ANY; 1468 ip->ip_dst.s_addr = sc->sc_sync_peer.s_addr; 1469 1470 /* Request a full state table update. */ 1471 if ((sc->sc_flags & PFSYNCF_OK) && carp_demote_adj_p) 1472 (*carp_demote_adj_p)(V_pfsync_carp_adj, 1473 "pfsync bulk start"); 1474 sc->sc_flags &= ~PFSYNCF_OK; 1475 if (V_pf_status.debug >= PF_DEBUG_MISC) 1476 printf("pfsync: requesting bulk update\n"); 1477 PFSYNC_UNLOCK(sc); 1478 PFSYNC_BUCKET_LOCK(&sc->sc_buckets[0]); 1479 pfsync_request_update(0, 0); 1480 PFSYNC_BUCKET_UNLOCK(&sc->sc_buckets[0]); 1481 PFSYNC_BLOCK(sc); 1482 sc->sc_ureq_sent = time_uptime; 1483 callout_reset(&sc->sc_bulkfail_tmo, 5 * hz, pfsync_bulk_fail, 1484 sc); 1485 PFSYNC_BUNLOCK(sc); 1486 1487 break; 1488 } 1489 default: 1490 return (ENOTTY); 1491 } 1492 1493 return (0); 1494 } 1495 1496 static void 1497 pfsync_out_state(struct pf_state *st, void *buf) 1498 { 1499 struct pfsync_state *sp = buf; 1500 1501 pfsync_state_export(sp, st); 1502 } 1503 1504 static void 1505 pfsync_out_iack(struct pf_state *st, void *buf) 1506 { 1507 struct pfsync_ins_ack *iack = buf; 1508 1509 iack->id = st->id; 1510 iack->creatorid = st->creatorid; 1511 } 1512 1513 static void 1514 pfsync_out_upd_c(struct pf_state *st, void *buf) 1515 { 1516 struct pfsync_upd_c *up = buf; 1517 1518 bzero(up, sizeof(*up)); 1519 up->id = st->id; 1520 pf_state_peer_hton(&st->src, &up->src); 1521 pf_state_peer_hton(&st->dst, &up->dst); 1522 up->creatorid = st->creatorid; 1523 up->timeout = st->timeout; 1524 } 1525 1526 static void 1527 pfsync_out_del(struct pf_state *st, void *buf) 1528 { 1529 struct pfsync_del_c *dp = buf; 1530 1531 dp->id = st->id; 1532 dp->creatorid = st->creatorid; 1533 st->state_flags |= PFSTATE_NOSYNC; 1534 } 1535 1536 static void 1537 pfsync_drop(struct pfsync_softc *sc) 1538 { 1539 struct pf_state *st, *next; 1540 struct pfsync_upd_req_item *ur; 1541 struct pfsync_bucket *b; 1542 int c, q; 1543 1544 for (c = 0; c < pfsync_buckets; c++) { 1545 b = &sc->sc_buckets[c]; 1546 for (q = 0; q < PFSYNC_S_COUNT; q++) { 1547 if (TAILQ_EMPTY(&b->b_qs[q])) 1548 continue; 1549 1550 TAILQ_FOREACH_SAFE(st, &b->b_qs[q], sync_list, next) { 1551 KASSERT(st->sync_state == q, 1552 ("%s: st->sync_state == q", 1553 __func__)); 1554 st->sync_state = PFSYNC_S_NONE; 1555 pf_release_state(st); 1556 } 1557 TAILQ_INIT(&b->b_qs[q]); 1558 } 1559 1560 while ((ur = TAILQ_FIRST(&b->b_upd_req_list)) != NULL) { 1561 TAILQ_REMOVE(&b->b_upd_req_list, ur, ur_entry); 1562 free(ur, M_PFSYNC); 1563 } 1564 1565 b->b_len = PFSYNC_MINPKT; 1566 b->b_plus = NULL; 1567 } 1568 } 1569 1570 static void 1571 pfsync_sendout(int schedswi, int c) 1572 { 1573 struct pfsync_softc *sc = V_pfsyncif; 1574 struct ifnet *ifp = sc->sc_ifp; 1575 struct mbuf *m; 1576 struct ip *ip; 1577 struct pfsync_header *ph; 1578 struct pfsync_subheader *subh; 1579 struct pf_state *st, *st_next; 1580 struct pfsync_upd_req_item *ur; 1581 struct pfsync_bucket *b = &sc->sc_buckets[c]; 1582 int offset; 1583 int q, count = 0; 1584 1585 KASSERT(sc != NULL, ("%s: null sc", __func__)); 1586 KASSERT(b->b_len > PFSYNC_MINPKT, 1587 ("%s: sc_len %zu", __func__, b->b_len)); 1588 PFSYNC_BUCKET_LOCK_ASSERT(b); 1589 1590 if (ifp->if_bpf == NULL && sc->sc_sync_if == NULL) { 1591 pfsync_drop(sc); 1592 return; 1593 } 1594 1595 m = m_get2(max_linkhdr + b->b_len, M_NOWAIT, MT_DATA, M_PKTHDR); 1596 if (m == NULL) { 1597 if_inc_counter(sc->sc_ifp, IFCOUNTER_OERRORS, 1); 1598 V_pfsyncstats.pfsyncs_onomem++; 1599 return; 1600 } 1601 m->m_data += max_linkhdr; 1602 m->m_len = m->m_pkthdr.len = b->b_len; 1603 1604 /* build the ip header */ 1605 ip = (struct ip *)m->m_data; 1606 bcopy(&sc->sc_template, ip, sizeof(*ip)); 1607 offset = sizeof(*ip); 1608 1609 ip->ip_len = htons(m->m_pkthdr.len); 1610 ip_fillid(ip); 1611 1612 /* build the pfsync header */ 1613 ph = (struct pfsync_header *)(m->m_data + offset); 1614 bzero(ph, sizeof(*ph)); 1615 offset += sizeof(*ph); 1616 1617 ph->version = PFSYNC_VERSION; 1618 ph->len = htons(b->b_len - sizeof(*ip)); 1619 bcopy(V_pf_status.pf_chksum, ph->pfcksum, PF_MD5_DIGEST_LENGTH); 1620 1621 /* walk the queues */ 1622 for (q = 0; q < PFSYNC_S_COUNT; q++) { 1623 if (TAILQ_EMPTY(&b->b_qs[q])) 1624 continue; 1625 1626 subh = (struct pfsync_subheader *)(m->m_data + offset); 1627 offset += sizeof(*subh); 1628 1629 count = 0; 1630 TAILQ_FOREACH_SAFE(st, &b->b_qs[q], sync_list, st_next) { 1631 KASSERT(st->sync_state == q, 1632 ("%s: st->sync_state == q", 1633 __func__)); 1634 /* 1635 * XXXGL: some of write methods do unlocked reads 1636 * of state data :( 1637 */ 1638 pfsync_qs[q].write(st, m->m_data + offset); 1639 offset += pfsync_qs[q].len; 1640 st->sync_state = PFSYNC_S_NONE; 1641 pf_release_state(st); 1642 count++; 1643 } 1644 TAILQ_INIT(&b->b_qs[q]); 1645 1646 bzero(subh, sizeof(*subh)); 1647 subh->action = pfsync_qs[q].action; 1648 subh->count = htons(count); 1649 V_pfsyncstats.pfsyncs_oacts[pfsync_qs[q].action] += count; 1650 } 1651 1652 if (!TAILQ_EMPTY(&b->b_upd_req_list)) { 1653 subh = (struct pfsync_subheader *)(m->m_data + offset); 1654 offset += sizeof(*subh); 1655 1656 count = 0; 1657 while ((ur = TAILQ_FIRST(&b->b_upd_req_list)) != NULL) { 1658 TAILQ_REMOVE(&b->b_upd_req_list, ur, ur_entry); 1659 1660 bcopy(&ur->ur_msg, m->m_data + offset, 1661 sizeof(ur->ur_msg)); 1662 offset += sizeof(ur->ur_msg); 1663 free(ur, M_PFSYNC); 1664 count++; 1665 } 1666 1667 bzero(subh, sizeof(*subh)); 1668 subh->action = PFSYNC_ACT_UPD_REQ; 1669 subh->count = htons(count); 1670 V_pfsyncstats.pfsyncs_oacts[PFSYNC_ACT_UPD_REQ] += count; 1671 } 1672 1673 /* has someone built a custom region for us to add? */ 1674 if (b->b_plus != NULL) { 1675 bcopy(b->b_plus, m->m_data + offset, b->b_pluslen); 1676 offset += b->b_pluslen; 1677 1678 b->b_plus = NULL; 1679 } 1680 1681 subh = (struct pfsync_subheader *)(m->m_data + offset); 1682 offset += sizeof(*subh); 1683 1684 bzero(subh, sizeof(*subh)); 1685 subh->action = PFSYNC_ACT_EOF; 1686 subh->count = htons(1); 1687 V_pfsyncstats.pfsyncs_oacts[PFSYNC_ACT_EOF]++; 1688 1689 /* we're done, let's put it on the wire */ 1690 if (ifp->if_bpf) { 1691 m->m_data += sizeof(*ip); 1692 m->m_len = m->m_pkthdr.len = b->b_len - sizeof(*ip); 1693 BPF_MTAP(ifp, m); 1694 m->m_data -= sizeof(*ip); 1695 m->m_len = m->m_pkthdr.len = b->b_len; 1696 } 1697 1698 if (sc->sc_sync_if == NULL) { 1699 b->b_len = PFSYNC_MINPKT; 1700 m_freem(m); 1701 return; 1702 } 1703 1704 if_inc_counter(sc->sc_ifp, IFCOUNTER_OPACKETS, 1); 1705 if_inc_counter(sc->sc_ifp, IFCOUNTER_OBYTES, m->m_pkthdr.len); 1706 b->b_len = PFSYNC_MINPKT; 1707 1708 if (!_IF_QFULL(&b->b_snd)) 1709 _IF_ENQUEUE(&b->b_snd, m); 1710 else { 1711 m_freem(m); 1712 if_inc_counter(sc->sc_ifp, IFCOUNTER_OQDROPS, 1); 1713 } 1714 if (schedswi) 1715 swi_sched(V_pfsync_swi_cookie, 0); 1716 } 1717 1718 static void 1719 pfsync_insert_state(struct pf_state *st) 1720 { 1721 struct pfsync_softc *sc = V_pfsyncif; 1722 struct pfsync_bucket *b = pfsync_get_bucket(sc, st); 1723 1724 if (st->state_flags & PFSTATE_NOSYNC) 1725 return; 1726 1727 if ((st->rule.ptr->rule_flag & PFRULE_NOSYNC) || 1728 st->key[PF_SK_WIRE]->proto == IPPROTO_PFSYNC) { 1729 st->state_flags |= PFSTATE_NOSYNC; 1730 return; 1731 } 1732 1733 KASSERT(st->sync_state == PFSYNC_S_NONE, 1734 ("%s: st->sync_state %u", __func__, st->sync_state)); 1735 1736 PFSYNC_BUCKET_LOCK(b); 1737 if (b->b_len == PFSYNC_MINPKT) 1738 callout_reset(&b->b_tmo, 1 * hz, pfsync_timeout, b); 1739 1740 pfsync_q_ins(st, PFSYNC_S_INS, true); 1741 PFSYNC_BUCKET_UNLOCK(b); 1742 1743 st->sync_updates = 0; 1744 } 1745 1746 static int 1747 pfsync_defer(struct pf_state *st, struct mbuf *m) 1748 { 1749 struct pfsync_softc *sc = V_pfsyncif; 1750 struct pfsync_deferral *pd; 1751 struct pfsync_bucket *b = pfsync_get_bucket(sc, st); 1752 1753 if (m->m_flags & (M_BCAST|M_MCAST)) 1754 return (0); 1755 1756 PFSYNC_LOCK(sc); 1757 1758 if (sc == NULL || !(sc->sc_ifp->if_flags & IFF_DRV_RUNNING) || 1759 !(sc->sc_flags & PFSYNCF_DEFER)) { 1760 PFSYNC_UNLOCK(sc); 1761 return (0); 1762 } 1763 1764 if (b->b_deferred >= 128) 1765 pfsync_undefer(TAILQ_FIRST(&b->b_deferrals), 0); 1766 1767 pd = malloc(sizeof(*pd), M_PFSYNC, M_NOWAIT); 1768 if (pd == NULL) 1769 return (0); 1770 b->b_deferred++; 1771 1772 m->m_flags |= M_SKIP_FIREWALL; 1773 st->state_flags |= PFSTATE_ACK; 1774 1775 pd->pd_sc = sc; 1776 pd->pd_refs = 0; 1777 pd->pd_st = st; 1778 pf_ref_state(st); 1779 pd->pd_m = m; 1780 1781 TAILQ_INSERT_TAIL(&b->b_deferrals, pd, pd_entry); 1782 callout_init_mtx(&pd->pd_tmo, &b->b_mtx, CALLOUT_RETURNUNLOCKED); 1783 callout_reset(&pd->pd_tmo, 10, pfsync_defer_tmo, pd); 1784 1785 pfsync_push(b); 1786 1787 return (1); 1788 } 1789 1790 static void 1791 pfsync_undefer(struct pfsync_deferral *pd, int drop) 1792 { 1793 struct pfsync_softc *sc = pd->pd_sc; 1794 struct mbuf *m = pd->pd_m; 1795 struct pf_state *st = pd->pd_st; 1796 struct pfsync_bucket *b = pfsync_get_bucket(sc, st); 1797 1798 PFSYNC_BUCKET_LOCK_ASSERT(b); 1799 1800 TAILQ_REMOVE(&b->b_deferrals, pd, pd_entry); 1801 b->b_deferred--; 1802 pd->pd_st->state_flags &= ~PFSTATE_ACK; /* XXX: locking! */ 1803 free(pd, M_PFSYNC); 1804 pf_release_state(st); 1805 1806 if (drop) 1807 m_freem(m); 1808 else { 1809 _IF_ENQUEUE(&b->b_snd, m); 1810 pfsync_push(b); 1811 } 1812 } 1813 1814 static void 1815 pfsync_defer_tmo(void *arg) 1816 { 1817 struct epoch_tracker et; 1818 struct pfsync_deferral *pd = arg; 1819 struct pfsync_softc *sc = pd->pd_sc; 1820 struct mbuf *m = pd->pd_m; 1821 struct pf_state *st = pd->pd_st; 1822 struct pfsync_bucket *b = pfsync_get_bucket(sc, st); 1823 1824 PFSYNC_BUCKET_LOCK_ASSERT(b); 1825 1826 NET_EPOCH_ENTER(et); 1827 CURVNET_SET(m->m_pkthdr.rcvif->if_vnet); 1828 1829 TAILQ_REMOVE(&b->b_deferrals, pd, pd_entry); 1830 b->b_deferred--; 1831 pd->pd_st->state_flags &= ~PFSTATE_ACK; /* XXX: locking! */ 1832 if (pd->pd_refs == 0) 1833 free(pd, M_PFSYNC); 1834 PFSYNC_UNLOCK(sc); 1835 1836 ip_output(m, NULL, NULL, 0, NULL, NULL); 1837 1838 pf_release_state(st); 1839 1840 CURVNET_RESTORE(); 1841 NET_EPOCH_EXIT(et); 1842 } 1843 1844 static void 1845 pfsync_undefer_state(struct pf_state *st, int drop) 1846 { 1847 struct pfsync_softc *sc = V_pfsyncif; 1848 struct pfsync_deferral *pd; 1849 struct pfsync_bucket *b = pfsync_get_bucket(sc, st); 1850 1851 PFSYNC_BUCKET_LOCK(b); 1852 1853 TAILQ_FOREACH(pd, &b->b_deferrals, pd_entry) { 1854 if (pd->pd_st == st) { 1855 if (callout_stop(&pd->pd_tmo) > 0) 1856 pfsync_undefer(pd, drop); 1857 1858 PFSYNC_BUCKET_UNLOCK(b); 1859 return; 1860 } 1861 } 1862 PFSYNC_BUCKET_UNLOCK(b); 1863 1864 panic("%s: unable to find deferred state", __func__); 1865 } 1866 1867 static struct pfsync_bucket* 1868 pfsync_get_bucket(struct pfsync_softc *sc, struct pf_state *st) 1869 { 1870 int c = PF_IDHASH(st) % pfsync_buckets; 1871 return &sc->sc_buckets[c]; 1872 } 1873 1874 static void 1875 pfsync_update_state(struct pf_state *st) 1876 { 1877 struct pfsync_softc *sc = V_pfsyncif; 1878 bool sync = false, ref = true; 1879 struct pfsync_bucket *b = pfsync_get_bucket(sc, st); 1880 1881 PF_STATE_LOCK_ASSERT(st); 1882 PFSYNC_BUCKET_LOCK(b); 1883 1884 if (st->state_flags & PFSTATE_ACK) 1885 pfsync_undefer_state(st, 0); 1886 if (st->state_flags & PFSTATE_NOSYNC) { 1887 if (st->sync_state != PFSYNC_S_NONE) 1888 pfsync_q_del(st, true, b); 1889 PFSYNC_BUCKET_UNLOCK(b); 1890 return; 1891 } 1892 1893 if (b->b_len == PFSYNC_MINPKT) 1894 callout_reset(&b->b_tmo, 1 * hz, pfsync_timeout, b); 1895 1896 switch (st->sync_state) { 1897 case PFSYNC_S_UPD_C: 1898 case PFSYNC_S_UPD: 1899 case PFSYNC_S_INS: 1900 /* we're already handling it */ 1901 1902 if (st->key[PF_SK_WIRE]->proto == IPPROTO_TCP) { 1903 st->sync_updates++; 1904 if (st->sync_updates >= sc->sc_maxupdates) 1905 sync = true; 1906 } 1907 break; 1908 1909 case PFSYNC_S_IACK: 1910 pfsync_q_del(st, false, b); 1911 ref = false; 1912 /* FALLTHROUGH */ 1913 1914 case PFSYNC_S_NONE: 1915 pfsync_q_ins(st, PFSYNC_S_UPD_C, ref); 1916 st->sync_updates = 0; 1917 break; 1918 1919 default: 1920 panic("%s: unexpected sync state %d", __func__, st->sync_state); 1921 } 1922 1923 if (sync || (time_uptime - st->pfsync_time) < 2) 1924 pfsync_push(b); 1925 1926 PFSYNC_BUCKET_UNLOCK(b); 1927 } 1928 1929 static void 1930 pfsync_request_update(u_int32_t creatorid, u_int64_t id) 1931 { 1932 struct pfsync_softc *sc = V_pfsyncif; 1933 struct pfsync_bucket *b = &sc->sc_buckets[0]; 1934 struct pfsync_upd_req_item *item; 1935 size_t nlen = sizeof(struct pfsync_upd_req); 1936 1937 PFSYNC_BUCKET_LOCK_ASSERT(b); 1938 1939 /* 1940 * This code does a bit to prevent multiple update requests for the 1941 * same state being generated. It searches current subheader queue, 1942 * but it doesn't lookup into queue of already packed datagrams. 1943 */ 1944 TAILQ_FOREACH(item, &b->b_upd_req_list, ur_entry) 1945 if (item->ur_msg.id == id && 1946 item->ur_msg.creatorid == creatorid) 1947 return; 1948 1949 item = malloc(sizeof(*item), M_PFSYNC, M_NOWAIT); 1950 if (item == NULL) 1951 return; /* XXX stats */ 1952 1953 item->ur_msg.id = id; 1954 item->ur_msg.creatorid = creatorid; 1955 1956 if (TAILQ_EMPTY(&b->b_upd_req_list)) 1957 nlen += sizeof(struct pfsync_subheader); 1958 1959 if (b->b_len + nlen > sc->sc_ifp->if_mtu) { 1960 pfsync_sendout(0, 0); 1961 1962 nlen = sizeof(struct pfsync_subheader) + 1963 sizeof(struct pfsync_upd_req); 1964 } 1965 1966 TAILQ_INSERT_TAIL(&b->b_upd_req_list, item, ur_entry); 1967 b->b_len += nlen; 1968 1969 pfsync_push(b); 1970 } 1971 1972 static bool 1973 pfsync_update_state_req(struct pf_state *st) 1974 { 1975 struct pfsync_softc *sc = V_pfsyncif; 1976 bool ref = true, full = false; 1977 struct pfsync_bucket *b = pfsync_get_bucket(sc, st); 1978 1979 PF_STATE_LOCK_ASSERT(st); 1980 PFSYNC_BUCKET_LOCK(b); 1981 1982 if (st->state_flags & PFSTATE_NOSYNC) { 1983 if (st->sync_state != PFSYNC_S_NONE) 1984 pfsync_q_del(st, true, b); 1985 PFSYNC_BUCKET_UNLOCK(b); 1986 return (full); 1987 } 1988 1989 switch (st->sync_state) { 1990 case PFSYNC_S_UPD_C: 1991 case PFSYNC_S_IACK: 1992 pfsync_q_del(st, false, b); 1993 ref = false; 1994 /* FALLTHROUGH */ 1995 1996 case PFSYNC_S_NONE: 1997 pfsync_q_ins(st, PFSYNC_S_UPD, ref); 1998 pfsync_push(b); 1999 break; 2000 2001 case PFSYNC_S_INS: 2002 case PFSYNC_S_UPD: 2003 case PFSYNC_S_DEL: 2004 /* we're already handling it */ 2005 break; 2006 2007 default: 2008 panic("%s: unexpected sync state %d", __func__, st->sync_state); 2009 } 2010 2011 if ((sc->sc_ifp->if_mtu - b->b_len) < sizeof(struct pfsync_state)) 2012 full = true; 2013 2014 PFSYNC_BUCKET_UNLOCK(b); 2015 2016 return (full); 2017 } 2018 2019 static void 2020 pfsync_delete_state(struct pf_state *st) 2021 { 2022 struct pfsync_softc *sc = V_pfsyncif; 2023 struct pfsync_bucket *b = pfsync_get_bucket(sc, st); 2024 bool ref = true; 2025 2026 PFSYNC_BUCKET_LOCK(b); 2027 if (st->state_flags & PFSTATE_ACK) 2028 pfsync_undefer_state(st, 1); 2029 if (st->state_flags & PFSTATE_NOSYNC) { 2030 if (st->sync_state != PFSYNC_S_NONE) 2031 pfsync_q_del(st, true, b); 2032 PFSYNC_BUCKET_UNLOCK(b); 2033 return; 2034 } 2035 2036 if (b->b_len == PFSYNC_MINPKT) 2037 callout_reset(&b->b_tmo, 1 * hz, pfsync_timeout, b); 2038 2039 switch (st->sync_state) { 2040 case PFSYNC_S_INS: 2041 /* We never got to tell the world so just forget about it. */ 2042 pfsync_q_del(st, true, b); 2043 break; 2044 2045 case PFSYNC_S_UPD_C: 2046 case PFSYNC_S_UPD: 2047 case PFSYNC_S_IACK: 2048 pfsync_q_del(st, false, b); 2049 ref = false; 2050 /* FALLTHROUGH */ 2051 2052 case PFSYNC_S_NONE: 2053 pfsync_q_ins(st, PFSYNC_S_DEL, ref); 2054 break; 2055 2056 default: 2057 panic("%s: unexpected sync state %d", __func__, st->sync_state); 2058 } 2059 2060 PFSYNC_BUCKET_UNLOCK(b); 2061 } 2062 2063 static void 2064 pfsync_clear_states(u_int32_t creatorid, const char *ifname) 2065 { 2066 struct { 2067 struct pfsync_subheader subh; 2068 struct pfsync_clr clr; 2069 } __packed r; 2070 2071 bzero(&r, sizeof(r)); 2072 2073 r.subh.action = PFSYNC_ACT_CLR; 2074 r.subh.count = htons(1); 2075 V_pfsyncstats.pfsyncs_oacts[PFSYNC_ACT_CLR]++; 2076 2077 strlcpy(r.clr.ifname, ifname, sizeof(r.clr.ifname)); 2078 r.clr.creatorid = creatorid; 2079 2080 pfsync_send_plus(&r, sizeof(r)); 2081 } 2082 2083 static void 2084 pfsync_q_ins(struct pf_state *st, int q, bool ref) 2085 { 2086 struct pfsync_softc *sc = V_pfsyncif; 2087 size_t nlen = pfsync_qs[q].len; 2088 struct pfsync_bucket *b = pfsync_get_bucket(sc, st); 2089 2090 PFSYNC_BUCKET_LOCK_ASSERT(b); 2091 2092 KASSERT(st->sync_state == PFSYNC_S_NONE, 2093 ("%s: st->sync_state %u", __func__, st->sync_state)); 2094 KASSERT(b->b_len >= PFSYNC_MINPKT, ("pfsync pkt len is too low %zu", 2095 b->b_len)); 2096 2097 if (TAILQ_EMPTY(&b->b_qs[q])) 2098 nlen += sizeof(struct pfsync_subheader); 2099 2100 if (b->b_len + nlen > sc->sc_ifp->if_mtu) { 2101 pfsync_sendout(1, b->b_id); 2102 2103 nlen = sizeof(struct pfsync_subheader) + pfsync_qs[q].len; 2104 } 2105 2106 b->b_len += nlen; 2107 TAILQ_INSERT_TAIL(&b->b_qs[q], st, sync_list); 2108 st->sync_state = q; 2109 if (ref) 2110 pf_ref_state(st); 2111 } 2112 2113 static void 2114 pfsync_q_del(struct pf_state *st, bool unref, struct pfsync_bucket *b) 2115 { 2116 int q = st->sync_state; 2117 2118 PFSYNC_BUCKET_LOCK_ASSERT(b); 2119 KASSERT(st->sync_state != PFSYNC_S_NONE, 2120 ("%s: st->sync_state != PFSYNC_S_NONE", __func__)); 2121 2122 b->b_len -= pfsync_qs[q].len; 2123 TAILQ_REMOVE(&b->b_qs[q], st, sync_list); 2124 st->sync_state = PFSYNC_S_NONE; 2125 if (unref) 2126 pf_release_state(st); 2127 2128 if (TAILQ_EMPTY(&b->b_qs[q])) 2129 b->b_len -= sizeof(struct pfsync_subheader); 2130 } 2131 2132 static void 2133 pfsync_bulk_start(void) 2134 { 2135 struct pfsync_softc *sc = V_pfsyncif; 2136 2137 if (V_pf_status.debug >= PF_DEBUG_MISC) 2138 printf("pfsync: received bulk update request\n"); 2139 2140 PFSYNC_BLOCK(sc); 2141 2142 sc->sc_ureq_received = time_uptime; 2143 sc->sc_bulk_hashid = 0; 2144 sc->sc_bulk_stateid = 0; 2145 pfsync_bulk_status(PFSYNC_BUS_START); 2146 callout_reset(&sc->sc_bulk_tmo, 1, pfsync_bulk_update, sc); 2147 PFSYNC_BUNLOCK(sc); 2148 } 2149 2150 static void 2151 pfsync_bulk_update(void *arg) 2152 { 2153 struct pfsync_softc *sc = arg; 2154 struct pf_state *s; 2155 int i, sent = 0; 2156 2157 PFSYNC_BLOCK_ASSERT(sc); 2158 CURVNET_SET(sc->sc_ifp->if_vnet); 2159 2160 /* 2161 * Start with last state from previous invocation. 2162 * It may had gone, in this case start from the 2163 * hash slot. 2164 */ 2165 s = pf_find_state_byid(sc->sc_bulk_stateid, sc->sc_bulk_creatorid); 2166 2167 if (s != NULL) 2168 i = PF_IDHASH(s); 2169 else 2170 i = sc->sc_bulk_hashid; 2171 2172 for (; i <= pf_hashmask; i++) { 2173 struct pf_idhash *ih = &V_pf_idhash[i]; 2174 2175 if (s != NULL) 2176 PF_HASHROW_ASSERT(ih); 2177 else { 2178 PF_HASHROW_LOCK(ih); 2179 s = LIST_FIRST(&ih->states); 2180 } 2181 2182 for (; s; s = LIST_NEXT(s, entry)) { 2183 if (s->sync_state == PFSYNC_S_NONE && 2184 s->timeout < PFTM_MAX && 2185 s->pfsync_time <= sc->sc_ureq_received) { 2186 if (pfsync_update_state_req(s)) { 2187 /* We've filled a packet. */ 2188 sc->sc_bulk_hashid = i; 2189 sc->sc_bulk_stateid = s->id; 2190 sc->sc_bulk_creatorid = s->creatorid; 2191 PF_HASHROW_UNLOCK(ih); 2192 callout_reset(&sc->sc_bulk_tmo, 1, 2193 pfsync_bulk_update, sc); 2194 goto full; 2195 } 2196 sent++; 2197 } 2198 } 2199 PF_HASHROW_UNLOCK(ih); 2200 } 2201 2202 /* We're done. */ 2203 pfsync_bulk_status(PFSYNC_BUS_END); 2204 full: 2205 CURVNET_RESTORE(); 2206 } 2207 2208 static void 2209 pfsync_bulk_status(u_int8_t status) 2210 { 2211 struct { 2212 struct pfsync_subheader subh; 2213 struct pfsync_bus bus; 2214 } __packed r; 2215 2216 struct pfsync_softc *sc = V_pfsyncif; 2217 2218 bzero(&r, sizeof(r)); 2219 2220 r.subh.action = PFSYNC_ACT_BUS; 2221 r.subh.count = htons(1); 2222 V_pfsyncstats.pfsyncs_oacts[PFSYNC_ACT_BUS]++; 2223 2224 r.bus.creatorid = V_pf_status.hostid; 2225 r.bus.endtime = htonl(time_uptime - sc->sc_ureq_received); 2226 r.bus.status = status; 2227 2228 pfsync_send_plus(&r, sizeof(r)); 2229 } 2230 2231 static void 2232 pfsync_bulk_fail(void *arg) 2233 { 2234 struct pfsync_softc *sc = arg; 2235 struct pfsync_bucket *b = &sc->sc_buckets[0]; 2236 2237 CURVNET_SET(sc->sc_ifp->if_vnet); 2238 2239 PFSYNC_BLOCK_ASSERT(sc); 2240 2241 if (sc->sc_bulk_tries++ < PFSYNC_MAX_BULKTRIES) { 2242 /* Try again */ 2243 callout_reset(&sc->sc_bulkfail_tmo, 5 * hz, 2244 pfsync_bulk_fail, V_pfsyncif); 2245 PFSYNC_BUCKET_LOCK(b); 2246 pfsync_request_update(0, 0); 2247 PFSYNC_BUCKET_UNLOCK(b); 2248 } else { 2249 /* Pretend like the transfer was ok. */ 2250 sc->sc_ureq_sent = 0; 2251 sc->sc_bulk_tries = 0; 2252 PFSYNC_LOCK(sc); 2253 if (!(sc->sc_flags & PFSYNCF_OK) && carp_demote_adj_p) 2254 (*carp_demote_adj_p)(-V_pfsync_carp_adj, 2255 "pfsync bulk fail"); 2256 sc->sc_flags |= PFSYNCF_OK; 2257 PFSYNC_UNLOCK(sc); 2258 if (V_pf_status.debug >= PF_DEBUG_MISC) 2259 printf("pfsync: failed to receive bulk update\n"); 2260 } 2261 2262 CURVNET_RESTORE(); 2263 } 2264 2265 static void 2266 pfsync_send_plus(void *plus, size_t pluslen) 2267 { 2268 struct pfsync_softc *sc = V_pfsyncif; 2269 struct pfsync_bucket *b = &sc->sc_buckets[0]; 2270 2271 PFSYNC_BUCKET_LOCK(b); 2272 2273 if (b->b_len + pluslen > sc->sc_ifp->if_mtu) 2274 pfsync_sendout(1, b->b_id); 2275 2276 b->b_plus = plus; 2277 b->b_len += (b->b_pluslen = pluslen); 2278 2279 pfsync_sendout(1, b->b_id); 2280 PFSYNC_BUCKET_UNLOCK(b); 2281 } 2282 2283 static void 2284 pfsync_timeout(void *arg) 2285 { 2286 struct pfsync_bucket *b = arg; 2287 2288 CURVNET_SET(b->b_sc->sc_ifp->if_vnet); 2289 PFSYNC_BUCKET_LOCK(b); 2290 pfsync_push(b); 2291 PFSYNC_BUCKET_UNLOCK(b); 2292 CURVNET_RESTORE(); 2293 } 2294 2295 static void 2296 pfsync_push(struct pfsync_bucket *b) 2297 { 2298 2299 PFSYNC_BUCKET_LOCK_ASSERT(b); 2300 2301 b->b_flags |= PFSYNCF_BUCKET_PUSH; 2302 swi_sched(V_pfsync_swi_cookie, 0); 2303 } 2304 2305 static void 2306 pfsync_push_all(struct pfsync_softc *sc) 2307 { 2308 int c; 2309 struct pfsync_bucket *b; 2310 2311 for (c = 0; c < pfsync_buckets; c++) { 2312 b = &sc->sc_buckets[c]; 2313 2314 PFSYNC_BUCKET_LOCK(b); 2315 pfsync_push(b); 2316 PFSYNC_BUCKET_UNLOCK(b); 2317 } 2318 } 2319 2320 static void 2321 pfsyncintr(void *arg) 2322 { 2323 struct epoch_tracker et; 2324 struct pfsync_softc *sc = arg; 2325 struct pfsync_bucket *b; 2326 struct mbuf *m, *n; 2327 int c; 2328 2329 NET_EPOCH_ENTER(et); 2330 CURVNET_SET(sc->sc_ifp->if_vnet); 2331 2332 for (c = 0; c < pfsync_buckets; c++) { 2333 b = &sc->sc_buckets[c]; 2334 2335 PFSYNC_BUCKET_LOCK(b); 2336 if ((b->b_flags & PFSYNCF_BUCKET_PUSH) && b->b_len > PFSYNC_MINPKT) { 2337 pfsync_sendout(0, b->b_id); 2338 b->b_flags &= ~PFSYNCF_BUCKET_PUSH; 2339 } 2340 _IF_DEQUEUE_ALL(&b->b_snd, m); 2341 PFSYNC_BUCKET_UNLOCK(b); 2342 2343 for (; m != NULL; m = n) { 2344 n = m->m_nextpkt; 2345 m->m_nextpkt = NULL; 2346 2347 /* 2348 * We distinguish between a deferral packet and our 2349 * own pfsync packet based on M_SKIP_FIREWALL 2350 * flag. This is XXX. 2351 */ 2352 if (m->m_flags & M_SKIP_FIREWALL) 2353 ip_output(m, NULL, NULL, 0, NULL, NULL); 2354 else if (ip_output(m, NULL, NULL, IP_RAWOUTPUT, &sc->sc_imo, 2355 NULL) == 0) 2356 V_pfsyncstats.pfsyncs_opackets++; 2357 else 2358 V_pfsyncstats.pfsyncs_oerrors++; 2359 } 2360 } 2361 CURVNET_RESTORE(); 2362 NET_EPOCH_EXIT(et); 2363 } 2364 2365 static int 2366 pfsync_multicast_setup(struct pfsync_softc *sc, struct ifnet *ifp, 2367 struct in_mfilter *imf) 2368 { 2369 struct ip_moptions *imo = &sc->sc_imo; 2370 int error; 2371 2372 if (!(ifp->if_flags & IFF_MULTICAST)) 2373 return (EADDRNOTAVAIL); 2374 2375 imo->imo_multicast_vif = -1; 2376 2377 if ((error = in_joingroup(ifp, &sc->sc_sync_peer, NULL, 2378 &imf->imf_inm)) != 0) 2379 return (error); 2380 2381 ip_mfilter_init(&imo->imo_head); 2382 ip_mfilter_insert(&imo->imo_head, imf); 2383 imo->imo_multicast_ifp = ifp; 2384 imo->imo_multicast_ttl = PFSYNC_DFLTTL; 2385 imo->imo_multicast_loop = 0; 2386 2387 return (0); 2388 } 2389 2390 static void 2391 pfsync_multicast_cleanup(struct pfsync_softc *sc) 2392 { 2393 struct ip_moptions *imo = &sc->sc_imo; 2394 struct in_mfilter *imf; 2395 2396 while ((imf = ip_mfilter_first(&imo->imo_head)) != NULL) { 2397 ip_mfilter_remove(&imo->imo_head, imf); 2398 in_leavegroup(imf->imf_inm, NULL); 2399 ip_mfilter_free(imf); 2400 } 2401 imo->imo_multicast_ifp = NULL; 2402 } 2403 2404 void 2405 pfsync_detach_ifnet(struct ifnet *ifp) 2406 { 2407 struct pfsync_softc *sc = V_pfsyncif; 2408 2409 if (sc == NULL) 2410 return; 2411 2412 PFSYNC_LOCK(sc); 2413 2414 if (sc->sc_sync_if == ifp) { 2415 /* We don't need mutlicast cleanup here, because the interface 2416 * is going away. We do need to ensure we don't try to do 2417 * cleanup later. 2418 */ 2419 ip_mfilter_init(&sc->sc_imo.imo_head); 2420 sc->sc_imo.imo_multicast_ifp = NULL; 2421 sc->sc_sync_if = NULL; 2422 } 2423 2424 PFSYNC_UNLOCK(sc); 2425 } 2426 2427 #ifdef INET 2428 extern struct domain inetdomain; 2429 static struct protosw in_pfsync_protosw = { 2430 .pr_type = SOCK_RAW, 2431 .pr_domain = &inetdomain, 2432 .pr_protocol = IPPROTO_PFSYNC, 2433 .pr_flags = PR_ATOMIC|PR_ADDR, 2434 .pr_input = pfsync_input, 2435 .pr_output = rip_output, 2436 .pr_ctloutput = rip_ctloutput, 2437 .pr_usrreqs = &rip_usrreqs 2438 }; 2439 #endif 2440 2441 static void 2442 pfsync_pointers_init() 2443 { 2444 2445 PF_RULES_WLOCK(); 2446 V_pfsync_state_import_ptr = pfsync_state_import; 2447 V_pfsync_insert_state_ptr = pfsync_insert_state; 2448 V_pfsync_update_state_ptr = pfsync_update_state; 2449 V_pfsync_delete_state_ptr = pfsync_delete_state; 2450 V_pfsync_clear_states_ptr = pfsync_clear_states; 2451 V_pfsync_defer_ptr = pfsync_defer; 2452 PF_RULES_WUNLOCK(); 2453 } 2454 2455 static void 2456 pfsync_pointers_uninit() 2457 { 2458 2459 PF_RULES_WLOCK(); 2460 V_pfsync_state_import_ptr = NULL; 2461 V_pfsync_insert_state_ptr = NULL; 2462 V_pfsync_update_state_ptr = NULL; 2463 V_pfsync_delete_state_ptr = NULL; 2464 V_pfsync_clear_states_ptr = NULL; 2465 V_pfsync_defer_ptr = NULL; 2466 PF_RULES_WUNLOCK(); 2467 } 2468 2469 static void 2470 vnet_pfsync_init(const void *unused __unused) 2471 { 2472 int error; 2473 2474 V_pfsync_cloner = if_clone_simple(pfsyncname, 2475 pfsync_clone_create, pfsync_clone_destroy, 1); 2476 error = swi_add(&V_pfsync_swi_ie, pfsyncname, pfsyncintr, V_pfsyncif, 2477 SWI_NET, INTR_MPSAFE, &V_pfsync_swi_cookie); 2478 if (error) { 2479 if_clone_detach(V_pfsync_cloner); 2480 log(LOG_INFO, "swi_add() failed in %s\n", __func__); 2481 } 2482 2483 pfsync_pointers_init(); 2484 } 2485 VNET_SYSINIT(vnet_pfsync_init, SI_SUB_PROTO_FIREWALL, SI_ORDER_ANY, 2486 vnet_pfsync_init, NULL); 2487 2488 static void 2489 vnet_pfsync_uninit(const void *unused __unused) 2490 { 2491 int ret; 2492 2493 pfsync_pointers_uninit(); 2494 2495 if_clone_detach(V_pfsync_cloner); 2496 ret = swi_remove(V_pfsync_swi_cookie); 2497 MPASS(ret == 0); 2498 ret = intr_event_destroy(V_pfsync_swi_ie); 2499 MPASS(ret == 0); 2500 } 2501 2502 VNET_SYSUNINIT(vnet_pfsync_uninit, SI_SUB_PROTO_FIREWALL, SI_ORDER_FOURTH, 2503 vnet_pfsync_uninit, NULL); 2504 2505 static int 2506 pfsync_init() 2507 { 2508 #ifdef INET 2509 int error; 2510 2511 pfsync_detach_ifnet_ptr = pfsync_detach_ifnet; 2512 2513 error = pf_proto_register(PF_INET, &in_pfsync_protosw); 2514 if (error) 2515 return (error); 2516 error = ipproto_register(IPPROTO_PFSYNC); 2517 if (error) { 2518 pf_proto_unregister(PF_INET, IPPROTO_PFSYNC, SOCK_RAW); 2519 return (error); 2520 } 2521 #endif 2522 2523 return (0); 2524 } 2525 2526 static void 2527 pfsync_uninit() 2528 { 2529 pfsync_detach_ifnet_ptr = NULL; 2530 2531 #ifdef INET 2532 ipproto_unregister(IPPROTO_PFSYNC); 2533 pf_proto_unregister(PF_INET, IPPROTO_PFSYNC, SOCK_RAW); 2534 #endif 2535 } 2536 2537 static int 2538 pfsync_modevent(module_t mod, int type, void *data) 2539 { 2540 int error = 0; 2541 2542 switch (type) { 2543 case MOD_LOAD: 2544 error = pfsync_init(); 2545 break; 2546 case MOD_UNLOAD: 2547 pfsync_uninit(); 2548 break; 2549 default: 2550 error = EINVAL; 2551 break; 2552 } 2553 2554 return (error); 2555 } 2556 2557 static moduledata_t pfsync_mod = { 2558 pfsyncname, 2559 pfsync_modevent, 2560 0 2561 }; 2562 2563 #define PFSYNC_MODVER 1 2564 2565 /* Stay on FIREWALL as we depend on pf being initialized and on inetdomain. */ 2566 DECLARE_MODULE(pfsync, pfsync_mod, SI_SUB_PROTO_FIREWALL, SI_ORDER_ANY); 2567 MODULE_VERSION(pfsync, PFSYNC_MODVER); 2568 MODULE_DEPEND(pfsync, pf, PF_MODVER, PF_MODVER, PF_MODVER); 2569