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_kstate *, 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_kstate *, 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_kstate *, void *); 157 static void pfsync_out_iack(struct pf_kstate *, void *); 158 static void pfsync_out_upd_c(struct pf_kstate *, void *); 159 static void pfsync_out_del(struct pf_kstate *, 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_kstate *, int, bool); 170 static void pfsync_q_del(struct pf_kstate *, bool, struct pfsync_bucket *); 171 172 static void pfsync_update_state(struct pf_kstate *); 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_kstate *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_kstate) 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_kstate *, struct mbuf *); 295 static void pfsync_undefer(struct pfsync_deferral *, int); 296 static void pfsync_undefer_state(struct pf_kstate *, 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_kstate *); 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_kstate *); 317 318 #define PFSYNC_MAX_BULKTRIES 12 319 #define PFSYNC_DEFER_TIMEOUT ((20 * hz) / 1000) 320 321 VNET_DEFINE(struct if_clone *, pfsync_cloner); 322 #define V_pfsync_cloner VNET(pfsync_cloner) 323 324 static int 325 pfsync_clone_create(struct if_clone *ifc, int unit, caddr_t param) 326 { 327 struct pfsync_softc *sc; 328 struct ifnet *ifp; 329 struct pfsync_bucket *b; 330 int c, q; 331 332 if (unit != 0) 333 return (EINVAL); 334 335 if (! pfsync_buckets) 336 pfsync_buckets = mp_ncpus * 2; 337 338 sc = malloc(sizeof(struct pfsync_softc), M_PFSYNC, M_WAITOK | M_ZERO); 339 sc->sc_flags |= PFSYNCF_OK; 340 sc->sc_maxupdates = 128; 341 342 ifp = sc->sc_ifp = if_alloc(IFT_PFSYNC); 343 if (ifp == NULL) { 344 free(sc, M_PFSYNC); 345 return (ENOSPC); 346 } 347 if_initname(ifp, pfsyncname, unit); 348 ifp->if_softc = sc; 349 ifp->if_ioctl = pfsyncioctl; 350 ifp->if_output = pfsyncoutput; 351 ifp->if_type = IFT_PFSYNC; 352 ifp->if_hdrlen = sizeof(struct pfsync_header); 353 ifp->if_mtu = ETHERMTU; 354 mtx_init(&sc->sc_mtx, pfsyncname, NULL, MTX_DEF); 355 mtx_init(&sc->sc_bulk_mtx, "pfsync bulk", NULL, MTX_DEF); 356 callout_init_mtx(&sc->sc_bulk_tmo, &sc->sc_bulk_mtx, 0); 357 callout_init_mtx(&sc->sc_bulkfail_tmo, &sc->sc_bulk_mtx, 0); 358 359 if_attach(ifp); 360 361 bpfattach(ifp, DLT_PFSYNC, PFSYNC_HDRLEN); 362 363 sc->sc_buckets = mallocarray(pfsync_buckets, sizeof(*sc->sc_buckets), 364 M_PFSYNC, M_ZERO | M_WAITOK); 365 for (c = 0; c < pfsync_buckets; c++) { 366 b = &sc->sc_buckets[c]; 367 mtx_init(&b->b_mtx, "pfsync bucket", NULL, MTX_DEF); 368 369 b->b_id = c; 370 b->b_sc = sc; 371 b->b_len = PFSYNC_MINPKT; 372 373 for (q = 0; q < PFSYNC_S_COUNT; q++) 374 TAILQ_INIT(&b->b_qs[q]); 375 376 TAILQ_INIT(&b->b_upd_req_list); 377 TAILQ_INIT(&b->b_deferrals); 378 379 callout_init(&b->b_tmo, 1); 380 381 b->b_snd.ifq_maxlen = ifqmaxlen; 382 } 383 384 V_pfsyncif = sc; 385 386 return (0); 387 } 388 389 static void 390 pfsync_clone_destroy(struct ifnet *ifp) 391 { 392 struct pfsync_softc *sc = ifp->if_softc; 393 struct pfsync_bucket *b; 394 int c; 395 396 for (c = 0; c < pfsync_buckets; c++) { 397 b = &sc->sc_buckets[c]; 398 /* 399 * At this stage, everything should have already been 400 * cleared by pfsync_uninit(), and we have only to 401 * drain callouts. 402 */ 403 while (b->b_deferred > 0) { 404 struct pfsync_deferral *pd = 405 TAILQ_FIRST(&b->b_deferrals); 406 407 TAILQ_REMOVE(&b->b_deferrals, pd, pd_entry); 408 b->b_deferred--; 409 if (callout_stop(&pd->pd_tmo) > 0) { 410 pf_release_state(pd->pd_st); 411 m_freem(pd->pd_m); 412 free(pd, M_PFSYNC); 413 } else { 414 pd->pd_refs++; 415 callout_drain(&pd->pd_tmo); 416 free(pd, M_PFSYNC); 417 } 418 } 419 420 callout_drain(&b->b_tmo); 421 } 422 423 callout_drain(&sc->sc_bulkfail_tmo); 424 callout_drain(&sc->sc_bulk_tmo); 425 426 if (!(sc->sc_flags & PFSYNCF_OK) && carp_demote_adj_p) 427 (*carp_demote_adj_p)(-V_pfsync_carp_adj, "pfsync destroy"); 428 bpfdetach(ifp); 429 if_detach(ifp); 430 431 pfsync_drop(sc); 432 433 if_free(ifp); 434 pfsync_multicast_cleanup(sc); 435 mtx_destroy(&sc->sc_mtx); 436 mtx_destroy(&sc->sc_bulk_mtx); 437 438 free(sc->sc_buckets, M_PFSYNC); 439 free(sc, M_PFSYNC); 440 441 V_pfsyncif = NULL; 442 } 443 444 static int 445 pfsync_alloc_scrub_memory(struct pfsync_state_peer *s, 446 struct pf_state_peer *d) 447 { 448 if (s->scrub.scrub_flag && d->scrub == NULL) { 449 d->scrub = uma_zalloc(V_pf_state_scrub_z, M_NOWAIT | M_ZERO); 450 if (d->scrub == NULL) 451 return (ENOMEM); 452 } 453 454 return (0); 455 } 456 457 static int 458 pfsync_state_import(struct pfsync_state *sp, u_int8_t flags) 459 { 460 struct pfsync_softc *sc = V_pfsyncif; 461 #ifndef __NO_STRICT_ALIGNMENT 462 struct pfsync_state_key key[2]; 463 #endif 464 struct pfsync_state_key *kw, *ks; 465 struct pf_kstate *st = NULL; 466 struct pf_state_key *skw = NULL, *sks = NULL; 467 struct pf_krule *r = NULL; 468 struct pfi_kkif *kif; 469 int error; 470 471 PF_RULES_RASSERT(); 472 473 if (sp->creatorid == 0) { 474 if (V_pf_status.debug >= PF_DEBUG_MISC) 475 printf("%s: invalid creator id: %08x\n", __func__, 476 ntohl(sp->creatorid)); 477 return (EINVAL); 478 } 479 480 if ((kif = pfi_kkif_find(sp->ifname)) == NULL) { 481 if (V_pf_status.debug >= PF_DEBUG_MISC) 482 printf("%s: unknown interface: %s\n", __func__, 483 sp->ifname); 484 if (flags & PFSYNC_SI_IOCTL) 485 return (EINVAL); 486 return (0); /* skip this state */ 487 } 488 489 /* 490 * If the ruleset checksums match or the state is coming from the ioctl, 491 * it's safe to associate the state with the rule of that number. 492 */ 493 if (sp->rule != htonl(-1) && sp->anchor == htonl(-1) && 494 (flags & (PFSYNC_SI_IOCTL | PFSYNC_SI_CKSUM)) && ntohl(sp->rule) < 495 pf_main_ruleset.rules[PF_RULESET_FILTER].active.rcount) 496 r = pf_main_ruleset.rules[ 497 PF_RULESET_FILTER].active.ptr_array[ntohl(sp->rule)]; 498 else 499 r = &V_pf_default_rule; 500 501 if ((r->max_states && 502 counter_u64_fetch(r->states_cur) >= r->max_states)) 503 goto cleanup; 504 505 /* 506 * XXXGL: consider M_WAITOK in ioctl path after. 507 */ 508 st = pf_alloc_state(M_NOWAIT); 509 if (__predict_false(st == NULL)) 510 goto cleanup; 511 512 if ((skw = uma_zalloc(V_pf_state_key_z, M_NOWAIT)) == NULL) 513 goto cleanup; 514 515 #ifndef __NO_STRICT_ALIGNMENT 516 bcopy(&sp->key, key, sizeof(struct pfsync_state_key) * 2); 517 kw = &key[PF_SK_WIRE]; 518 ks = &key[PF_SK_STACK]; 519 #else 520 kw = &sp->key[PF_SK_WIRE]; 521 ks = &sp->key[PF_SK_STACK]; 522 #endif 523 524 if (PF_ANEQ(&kw->addr[0], &ks->addr[0], sp->af) || 525 PF_ANEQ(&kw->addr[1], &ks->addr[1], sp->af) || 526 kw->port[0] != ks->port[0] || 527 kw->port[1] != ks->port[1]) { 528 sks = uma_zalloc(V_pf_state_key_z, M_NOWAIT); 529 if (sks == NULL) 530 goto cleanup; 531 } else 532 sks = skw; 533 534 /* allocate memory for scrub info */ 535 if (pfsync_alloc_scrub_memory(&sp->src, &st->src) || 536 pfsync_alloc_scrub_memory(&sp->dst, &st->dst)) 537 goto cleanup; 538 539 /* Copy to state key(s). */ 540 skw->addr[0] = kw->addr[0]; 541 skw->addr[1] = kw->addr[1]; 542 skw->port[0] = kw->port[0]; 543 skw->port[1] = kw->port[1]; 544 skw->proto = sp->proto; 545 skw->af = sp->af; 546 if (sks != skw) { 547 sks->addr[0] = ks->addr[0]; 548 sks->addr[1] = ks->addr[1]; 549 sks->port[0] = ks->port[0]; 550 sks->port[1] = ks->port[1]; 551 sks->proto = sp->proto; 552 sks->af = sp->af; 553 } 554 555 /* copy to state */ 556 bcopy(&sp->rt_addr, &st->rt_addr, sizeof(st->rt_addr)); 557 st->creation = time_uptime - ntohl(sp->creation); 558 st->expire = time_uptime; 559 if (sp->expire) { 560 uint32_t timeout; 561 562 timeout = r->timeout[sp->timeout]; 563 if (!timeout) 564 timeout = V_pf_default_rule.timeout[sp->timeout]; 565 566 /* sp->expire may have been adaptively scaled by export. */ 567 st->expire -= timeout - ntohl(sp->expire); 568 } 569 570 st->direction = sp->direction; 571 st->log = sp->log; 572 st->timeout = sp->timeout; 573 st->state_flags = sp->state_flags; 574 575 st->id = sp->id; 576 st->creatorid = sp->creatorid; 577 pf_state_peer_ntoh(&sp->src, &st->src); 578 pf_state_peer_ntoh(&sp->dst, &st->dst); 579 580 st->rule.ptr = r; 581 st->nat_rule.ptr = NULL; 582 st->anchor.ptr = NULL; 583 st->rt_kif = NULL; 584 585 st->pfsync_time = time_uptime; 586 st->sync_state = PFSYNC_S_NONE; 587 588 if (!(flags & PFSYNC_SI_IOCTL)) 589 st->state_flags |= PFSTATE_NOSYNC; 590 591 if ((error = pf_state_insert(kif, kif, skw, sks, st)) != 0) 592 goto cleanup_state; 593 594 /* XXX when we have nat_rule/anchors, use STATE_INC_COUNTERS */ 595 counter_u64_add(r->states_cur, 1); 596 counter_u64_add(r->states_tot, 1); 597 598 if (!(flags & PFSYNC_SI_IOCTL)) { 599 st->state_flags &= ~PFSTATE_NOSYNC; 600 if (st->state_flags & PFSTATE_ACK) { 601 pfsync_q_ins(st, PFSYNC_S_IACK, true); 602 pfsync_push_all(sc); 603 } 604 } 605 st->state_flags &= ~PFSTATE_ACK; 606 PF_STATE_UNLOCK(st); 607 608 return (0); 609 610 cleanup: 611 error = ENOMEM; 612 if (skw == sks) 613 sks = NULL; 614 if (skw != NULL) 615 uma_zfree(V_pf_state_key_z, skw); 616 if (sks != NULL) 617 uma_zfree(V_pf_state_key_z, sks); 618 619 cleanup_state: /* pf_state_insert() frees the state keys. */ 620 if (st) { 621 pf_free_state(st); 622 } 623 return (error); 624 } 625 626 static int 627 pfsync_input(struct mbuf **mp, int *offp __unused, int proto __unused) 628 { 629 struct pfsync_softc *sc = V_pfsyncif; 630 struct pfsync_pkt pkt; 631 struct mbuf *m = *mp; 632 struct ip *ip = mtod(m, struct ip *); 633 struct pfsync_header *ph; 634 struct pfsync_subheader subh; 635 636 int offset, len; 637 int rv; 638 uint16_t count; 639 640 PF_RULES_RLOCK_TRACKER; 641 642 *mp = NULL; 643 V_pfsyncstats.pfsyncs_ipackets++; 644 645 /* Verify that we have a sync interface configured. */ 646 if (!sc || !sc->sc_sync_if || !V_pf_status.running || 647 (sc->sc_ifp->if_drv_flags & IFF_DRV_RUNNING) == 0) 648 goto done; 649 650 /* verify that the packet came in on the right interface */ 651 if (sc->sc_sync_if != m->m_pkthdr.rcvif) { 652 V_pfsyncstats.pfsyncs_badif++; 653 goto done; 654 } 655 656 if_inc_counter(sc->sc_ifp, IFCOUNTER_IPACKETS, 1); 657 if_inc_counter(sc->sc_ifp, IFCOUNTER_IBYTES, m->m_pkthdr.len); 658 /* verify that the IP TTL is 255. */ 659 if (ip->ip_ttl != PFSYNC_DFLTTL) { 660 V_pfsyncstats.pfsyncs_badttl++; 661 goto done; 662 } 663 664 offset = ip->ip_hl << 2; 665 if (m->m_pkthdr.len < offset + sizeof(*ph)) { 666 V_pfsyncstats.pfsyncs_hdrops++; 667 goto done; 668 } 669 670 if (offset + sizeof(*ph) > m->m_len) { 671 if (m_pullup(m, offset + sizeof(*ph)) == NULL) { 672 V_pfsyncstats.pfsyncs_hdrops++; 673 return (IPPROTO_DONE); 674 } 675 ip = mtod(m, struct ip *); 676 } 677 ph = (struct pfsync_header *)((char *)ip + offset); 678 679 /* verify the version */ 680 if (ph->version != PFSYNC_VERSION) { 681 V_pfsyncstats.pfsyncs_badver++; 682 goto done; 683 } 684 685 len = ntohs(ph->len) + offset; 686 if (m->m_pkthdr.len < len) { 687 V_pfsyncstats.pfsyncs_badlen++; 688 goto done; 689 } 690 691 /* Cheaper to grab this now than having to mess with mbufs later */ 692 pkt.ip = ip; 693 pkt.src = ip->ip_src; 694 pkt.flags = 0; 695 696 /* 697 * Trusting pf_chksum during packet processing, as well as seeking 698 * in interface name tree, require holding PF_RULES_RLOCK(). 699 */ 700 PF_RULES_RLOCK(); 701 if (!bcmp(&ph->pfcksum, &V_pf_status.pf_chksum, PF_MD5_DIGEST_LENGTH)) 702 pkt.flags |= PFSYNC_SI_CKSUM; 703 704 offset += sizeof(*ph); 705 while (offset <= len - sizeof(subh)) { 706 m_copydata(m, offset, sizeof(subh), (caddr_t)&subh); 707 offset += sizeof(subh); 708 709 if (subh.action >= PFSYNC_ACT_MAX) { 710 V_pfsyncstats.pfsyncs_badact++; 711 PF_RULES_RUNLOCK(); 712 goto done; 713 } 714 715 count = ntohs(subh.count); 716 V_pfsyncstats.pfsyncs_iacts[subh.action] += count; 717 rv = (*pfsync_acts[subh.action])(&pkt, m, offset, count); 718 if (rv == -1) { 719 PF_RULES_RUNLOCK(); 720 return (IPPROTO_DONE); 721 } 722 723 offset += rv; 724 } 725 PF_RULES_RUNLOCK(); 726 727 done: 728 m_freem(m); 729 return (IPPROTO_DONE); 730 } 731 732 static int 733 pfsync_in_clr(struct pfsync_pkt *pkt, struct mbuf *m, int offset, int count) 734 { 735 struct pfsync_clr *clr; 736 struct mbuf *mp; 737 int len = sizeof(*clr) * count; 738 int i, offp; 739 u_int32_t creatorid; 740 741 mp = m_pulldown(m, offset, len, &offp); 742 if (mp == NULL) { 743 V_pfsyncstats.pfsyncs_badlen++; 744 return (-1); 745 } 746 clr = (struct pfsync_clr *)(mp->m_data + offp); 747 748 for (i = 0; i < count; i++) { 749 creatorid = clr[i].creatorid; 750 751 if (clr[i].ifname[0] != '\0' && 752 pfi_kkif_find(clr[i].ifname) == NULL) 753 continue; 754 755 for (int i = 0; i <= pf_hashmask; i++) { 756 struct pf_idhash *ih = &V_pf_idhash[i]; 757 struct pf_kstate *s; 758 relock: 759 PF_HASHROW_LOCK(ih); 760 LIST_FOREACH(s, &ih->states, entry) { 761 if (s->creatorid == creatorid) { 762 s->state_flags |= PFSTATE_NOSYNC; 763 pf_unlink_state(s); 764 goto relock; 765 } 766 } 767 PF_HASHROW_UNLOCK(ih); 768 } 769 } 770 771 return (len); 772 } 773 774 static int 775 pfsync_in_ins(struct pfsync_pkt *pkt, struct mbuf *m, int offset, int count) 776 { 777 struct mbuf *mp; 778 struct pfsync_state *sa, *sp; 779 int len = sizeof(*sp) * count; 780 int i, offp; 781 782 mp = m_pulldown(m, offset, len, &offp); 783 if (mp == NULL) { 784 V_pfsyncstats.pfsyncs_badlen++; 785 return (-1); 786 } 787 sa = (struct pfsync_state *)(mp->m_data + offp); 788 789 for (i = 0; i < count; i++) { 790 sp = &sa[i]; 791 792 /* Check for invalid values. */ 793 if (sp->timeout >= PFTM_MAX || 794 sp->src.state > PF_TCPS_PROXY_DST || 795 sp->dst.state > PF_TCPS_PROXY_DST || 796 sp->direction > PF_OUT || 797 (sp->af != AF_INET && sp->af != AF_INET6)) { 798 if (V_pf_status.debug >= PF_DEBUG_MISC) 799 printf("%s: invalid value\n", __func__); 800 V_pfsyncstats.pfsyncs_badval++; 801 continue; 802 } 803 804 if (pfsync_state_import(sp, pkt->flags) == ENOMEM) 805 /* Drop out, but process the rest of the actions. */ 806 break; 807 } 808 809 return (len); 810 } 811 812 static int 813 pfsync_in_iack(struct pfsync_pkt *pkt, struct mbuf *m, int offset, int count) 814 { 815 struct pfsync_ins_ack *ia, *iaa; 816 struct pf_kstate *st; 817 818 struct mbuf *mp; 819 int len = count * sizeof(*ia); 820 int offp, i; 821 822 mp = m_pulldown(m, offset, len, &offp); 823 if (mp == NULL) { 824 V_pfsyncstats.pfsyncs_badlen++; 825 return (-1); 826 } 827 iaa = (struct pfsync_ins_ack *)(mp->m_data + offp); 828 829 for (i = 0; i < count; i++) { 830 ia = &iaa[i]; 831 832 st = pf_find_state_byid(ia->id, ia->creatorid); 833 if (st == NULL) 834 continue; 835 836 if (st->state_flags & PFSTATE_ACK) { 837 pfsync_undefer_state(st, 0); 838 } 839 PF_STATE_UNLOCK(st); 840 } 841 /* 842 * XXX this is not yet implemented, but we know the size of the 843 * message so we can skip it. 844 */ 845 846 return (count * sizeof(struct pfsync_ins_ack)); 847 } 848 849 static int 850 pfsync_upd_tcp(struct pf_kstate *st, struct pfsync_state_peer *src, 851 struct pfsync_state_peer *dst) 852 { 853 int sync = 0; 854 855 PF_STATE_LOCK_ASSERT(st); 856 857 /* 858 * The state should never go backwards except 859 * for syn-proxy states. Neither should the 860 * sequence window slide backwards. 861 */ 862 if ((st->src.state > src->state && 863 (st->src.state < PF_TCPS_PROXY_SRC || 864 src->state >= PF_TCPS_PROXY_SRC)) || 865 866 (st->src.state == src->state && 867 SEQ_GT(st->src.seqlo, ntohl(src->seqlo)))) 868 sync++; 869 else 870 pf_state_peer_ntoh(src, &st->src); 871 872 if ((st->dst.state > dst->state) || 873 874 (st->dst.state >= TCPS_SYN_SENT && 875 SEQ_GT(st->dst.seqlo, ntohl(dst->seqlo)))) 876 sync++; 877 else 878 pf_state_peer_ntoh(dst, &st->dst); 879 880 return (sync); 881 } 882 883 static int 884 pfsync_in_upd(struct pfsync_pkt *pkt, struct mbuf *m, int offset, int count) 885 { 886 struct pfsync_softc *sc = V_pfsyncif; 887 struct pfsync_state *sa, *sp; 888 struct pf_kstate *st; 889 int sync; 890 891 struct mbuf *mp; 892 int len = count * sizeof(*sp); 893 int offp, i; 894 895 mp = m_pulldown(m, offset, len, &offp); 896 if (mp == NULL) { 897 V_pfsyncstats.pfsyncs_badlen++; 898 return (-1); 899 } 900 sa = (struct pfsync_state *)(mp->m_data + offp); 901 902 for (i = 0; i < count; i++) { 903 sp = &sa[i]; 904 905 /* check for invalid values */ 906 if (sp->timeout >= PFTM_MAX || 907 sp->src.state > PF_TCPS_PROXY_DST || 908 sp->dst.state > PF_TCPS_PROXY_DST) { 909 if (V_pf_status.debug >= PF_DEBUG_MISC) { 910 printf("pfsync_input: PFSYNC_ACT_UPD: " 911 "invalid value\n"); 912 } 913 V_pfsyncstats.pfsyncs_badval++; 914 continue; 915 } 916 917 st = pf_find_state_byid(sp->id, sp->creatorid); 918 if (st == NULL) { 919 /* insert the update */ 920 if (pfsync_state_import(sp, pkt->flags)) 921 V_pfsyncstats.pfsyncs_badstate++; 922 continue; 923 } 924 925 if (st->state_flags & PFSTATE_ACK) { 926 pfsync_undefer_state(st, 1); 927 } 928 929 if (st->key[PF_SK_WIRE]->proto == IPPROTO_TCP) 930 sync = pfsync_upd_tcp(st, &sp->src, &sp->dst); 931 else { 932 sync = 0; 933 934 /* 935 * Non-TCP protocol state machine always go 936 * forwards 937 */ 938 if (st->src.state > sp->src.state) 939 sync++; 940 else 941 pf_state_peer_ntoh(&sp->src, &st->src); 942 if (st->dst.state > sp->dst.state) 943 sync++; 944 else 945 pf_state_peer_ntoh(&sp->dst, &st->dst); 946 } 947 if (sync < 2) { 948 pfsync_alloc_scrub_memory(&sp->dst, &st->dst); 949 pf_state_peer_ntoh(&sp->dst, &st->dst); 950 st->expire = time_uptime; 951 st->timeout = sp->timeout; 952 } 953 st->pfsync_time = time_uptime; 954 955 if (sync) { 956 V_pfsyncstats.pfsyncs_stale++; 957 958 pfsync_update_state(st); 959 PF_STATE_UNLOCK(st); 960 pfsync_push_all(sc); 961 continue; 962 } 963 PF_STATE_UNLOCK(st); 964 } 965 966 return (len); 967 } 968 969 static int 970 pfsync_in_upd_c(struct pfsync_pkt *pkt, struct mbuf *m, int offset, int count) 971 { 972 struct pfsync_softc *sc = V_pfsyncif; 973 struct pfsync_upd_c *ua, *up; 974 struct pf_kstate *st; 975 int len = count * sizeof(*up); 976 int sync; 977 struct mbuf *mp; 978 int offp, i; 979 980 mp = m_pulldown(m, offset, len, &offp); 981 if (mp == NULL) { 982 V_pfsyncstats.pfsyncs_badlen++; 983 return (-1); 984 } 985 ua = (struct pfsync_upd_c *)(mp->m_data + offp); 986 987 for (i = 0; i < count; i++) { 988 up = &ua[i]; 989 990 /* check for invalid values */ 991 if (up->timeout >= PFTM_MAX || 992 up->src.state > PF_TCPS_PROXY_DST || 993 up->dst.state > PF_TCPS_PROXY_DST) { 994 if (V_pf_status.debug >= PF_DEBUG_MISC) { 995 printf("pfsync_input: " 996 "PFSYNC_ACT_UPD_C: " 997 "invalid value\n"); 998 } 999 V_pfsyncstats.pfsyncs_badval++; 1000 continue; 1001 } 1002 1003 st = pf_find_state_byid(up->id, up->creatorid); 1004 if (st == NULL) { 1005 /* We don't have this state. Ask for it. */ 1006 PFSYNC_BUCKET_LOCK(&sc->sc_buckets[0]); 1007 pfsync_request_update(up->creatorid, up->id); 1008 PFSYNC_BUCKET_UNLOCK(&sc->sc_buckets[0]); 1009 continue; 1010 } 1011 1012 if (st->state_flags & PFSTATE_ACK) { 1013 pfsync_undefer_state(st, 1); 1014 } 1015 1016 if (st->key[PF_SK_WIRE]->proto == IPPROTO_TCP) 1017 sync = pfsync_upd_tcp(st, &up->src, &up->dst); 1018 else { 1019 sync = 0; 1020 1021 /* 1022 * Non-TCP protocol state machine always go 1023 * forwards 1024 */ 1025 if (st->src.state > up->src.state) 1026 sync++; 1027 else 1028 pf_state_peer_ntoh(&up->src, &st->src); 1029 if (st->dst.state > up->dst.state) 1030 sync++; 1031 else 1032 pf_state_peer_ntoh(&up->dst, &st->dst); 1033 } 1034 if (sync < 2) { 1035 pfsync_alloc_scrub_memory(&up->dst, &st->dst); 1036 pf_state_peer_ntoh(&up->dst, &st->dst); 1037 st->expire = time_uptime; 1038 st->timeout = up->timeout; 1039 } 1040 st->pfsync_time = time_uptime; 1041 1042 if (sync) { 1043 V_pfsyncstats.pfsyncs_stale++; 1044 1045 pfsync_update_state(st); 1046 PF_STATE_UNLOCK(st); 1047 pfsync_push_all(sc); 1048 continue; 1049 } 1050 PF_STATE_UNLOCK(st); 1051 } 1052 1053 return (len); 1054 } 1055 1056 static int 1057 pfsync_in_ureq(struct pfsync_pkt *pkt, struct mbuf *m, int offset, int count) 1058 { 1059 struct pfsync_upd_req *ur, *ura; 1060 struct mbuf *mp; 1061 int len = count * sizeof(*ur); 1062 int i, offp; 1063 1064 struct pf_kstate *st; 1065 1066 mp = m_pulldown(m, offset, len, &offp); 1067 if (mp == NULL) { 1068 V_pfsyncstats.pfsyncs_badlen++; 1069 return (-1); 1070 } 1071 ura = (struct pfsync_upd_req *)(mp->m_data + offp); 1072 1073 for (i = 0; i < count; i++) { 1074 ur = &ura[i]; 1075 1076 if (ur->id == 0 && ur->creatorid == 0) 1077 pfsync_bulk_start(); 1078 else { 1079 st = pf_find_state_byid(ur->id, ur->creatorid); 1080 if (st == NULL) { 1081 V_pfsyncstats.pfsyncs_badstate++; 1082 continue; 1083 } 1084 if (st->state_flags & PFSTATE_NOSYNC) { 1085 PF_STATE_UNLOCK(st); 1086 continue; 1087 } 1088 1089 pfsync_update_state_req(st); 1090 PF_STATE_UNLOCK(st); 1091 } 1092 } 1093 1094 return (len); 1095 } 1096 1097 static int 1098 pfsync_in_del(struct pfsync_pkt *pkt, struct mbuf *m, int offset, int count) 1099 { 1100 struct mbuf *mp; 1101 struct pfsync_state *sa, *sp; 1102 struct pf_kstate *st; 1103 int len = count * sizeof(*sp); 1104 int offp, i; 1105 1106 mp = m_pulldown(m, offset, len, &offp); 1107 if (mp == NULL) { 1108 V_pfsyncstats.pfsyncs_badlen++; 1109 return (-1); 1110 } 1111 sa = (struct pfsync_state *)(mp->m_data + offp); 1112 1113 for (i = 0; i < count; i++) { 1114 sp = &sa[i]; 1115 1116 st = pf_find_state_byid(sp->id, sp->creatorid); 1117 if (st == NULL) { 1118 V_pfsyncstats.pfsyncs_badstate++; 1119 continue; 1120 } 1121 st->state_flags |= PFSTATE_NOSYNC; 1122 pf_unlink_state(st); 1123 } 1124 1125 return (len); 1126 } 1127 1128 static int 1129 pfsync_in_del_c(struct pfsync_pkt *pkt, struct mbuf *m, int offset, int count) 1130 { 1131 struct mbuf *mp; 1132 struct pfsync_del_c *sa, *sp; 1133 struct pf_kstate *st; 1134 int len = count * sizeof(*sp); 1135 int offp, i; 1136 1137 mp = m_pulldown(m, offset, len, &offp); 1138 if (mp == NULL) { 1139 V_pfsyncstats.pfsyncs_badlen++; 1140 return (-1); 1141 } 1142 sa = (struct pfsync_del_c *)(mp->m_data + offp); 1143 1144 for (i = 0; i < count; i++) { 1145 sp = &sa[i]; 1146 1147 st = pf_find_state_byid(sp->id, sp->creatorid); 1148 if (st == NULL) { 1149 V_pfsyncstats.pfsyncs_badstate++; 1150 continue; 1151 } 1152 1153 st->state_flags |= PFSTATE_NOSYNC; 1154 pf_unlink_state(st); 1155 } 1156 1157 return (len); 1158 } 1159 1160 static int 1161 pfsync_in_bus(struct pfsync_pkt *pkt, struct mbuf *m, int offset, int count) 1162 { 1163 struct pfsync_softc *sc = V_pfsyncif; 1164 struct pfsync_bus *bus; 1165 struct mbuf *mp; 1166 int len = count * sizeof(*bus); 1167 int offp; 1168 1169 PFSYNC_BLOCK(sc); 1170 1171 /* If we're not waiting for a bulk update, who cares. */ 1172 if (sc->sc_ureq_sent == 0) { 1173 PFSYNC_BUNLOCK(sc); 1174 return (len); 1175 } 1176 1177 mp = m_pulldown(m, offset, len, &offp); 1178 if (mp == NULL) { 1179 PFSYNC_BUNLOCK(sc); 1180 V_pfsyncstats.pfsyncs_badlen++; 1181 return (-1); 1182 } 1183 bus = (struct pfsync_bus *)(mp->m_data + offp); 1184 1185 switch (bus->status) { 1186 case PFSYNC_BUS_START: 1187 callout_reset(&sc->sc_bulkfail_tmo, 4 * hz + 1188 V_pf_limits[PF_LIMIT_STATES].limit / 1189 ((sc->sc_ifp->if_mtu - PFSYNC_MINPKT) / 1190 sizeof(struct pfsync_state)), 1191 pfsync_bulk_fail, sc); 1192 if (V_pf_status.debug >= PF_DEBUG_MISC) 1193 printf("pfsync: received bulk update start\n"); 1194 break; 1195 1196 case PFSYNC_BUS_END: 1197 if (time_uptime - ntohl(bus->endtime) >= 1198 sc->sc_ureq_sent) { 1199 /* that's it, we're happy */ 1200 sc->sc_ureq_sent = 0; 1201 sc->sc_bulk_tries = 0; 1202 callout_stop(&sc->sc_bulkfail_tmo); 1203 if (!(sc->sc_flags & PFSYNCF_OK) && carp_demote_adj_p) 1204 (*carp_demote_adj_p)(-V_pfsync_carp_adj, 1205 "pfsync bulk done"); 1206 sc->sc_flags |= PFSYNCF_OK; 1207 if (V_pf_status.debug >= PF_DEBUG_MISC) 1208 printf("pfsync: received valid " 1209 "bulk update end\n"); 1210 } else { 1211 if (V_pf_status.debug >= PF_DEBUG_MISC) 1212 printf("pfsync: received invalid " 1213 "bulk update end: bad timestamp\n"); 1214 } 1215 break; 1216 } 1217 PFSYNC_BUNLOCK(sc); 1218 1219 return (len); 1220 } 1221 1222 static int 1223 pfsync_in_tdb(struct pfsync_pkt *pkt, struct mbuf *m, int offset, int count) 1224 { 1225 int len = count * sizeof(struct pfsync_tdb); 1226 1227 #if defined(IPSEC) 1228 struct pfsync_tdb *tp; 1229 struct mbuf *mp; 1230 int offp; 1231 int i; 1232 int s; 1233 1234 mp = m_pulldown(m, offset, len, &offp); 1235 if (mp == NULL) { 1236 V_pfsyncstats.pfsyncs_badlen++; 1237 return (-1); 1238 } 1239 tp = (struct pfsync_tdb *)(mp->m_data + offp); 1240 1241 for (i = 0; i < count; i++) 1242 pfsync_update_net_tdb(&tp[i]); 1243 #endif 1244 1245 return (len); 1246 } 1247 1248 #if defined(IPSEC) 1249 /* Update an in-kernel tdb. Silently fail if no tdb is found. */ 1250 static void 1251 pfsync_update_net_tdb(struct pfsync_tdb *pt) 1252 { 1253 struct tdb *tdb; 1254 int s; 1255 1256 /* check for invalid values */ 1257 if (ntohl(pt->spi) <= SPI_RESERVED_MAX || 1258 (pt->dst.sa.sa_family != AF_INET && 1259 pt->dst.sa.sa_family != AF_INET6)) 1260 goto bad; 1261 1262 tdb = gettdb(pt->spi, &pt->dst, pt->sproto); 1263 if (tdb) { 1264 pt->rpl = ntohl(pt->rpl); 1265 pt->cur_bytes = (unsigned long long)be64toh(pt->cur_bytes); 1266 1267 /* Neither replay nor byte counter should ever decrease. */ 1268 if (pt->rpl < tdb->tdb_rpl || 1269 pt->cur_bytes < tdb->tdb_cur_bytes) { 1270 goto bad; 1271 } 1272 1273 tdb->tdb_rpl = pt->rpl; 1274 tdb->tdb_cur_bytes = pt->cur_bytes; 1275 } 1276 return; 1277 1278 bad: 1279 if (V_pf_status.debug >= PF_DEBUG_MISC) 1280 printf("pfsync_insert: PFSYNC_ACT_TDB_UPD: " 1281 "invalid value\n"); 1282 V_pfsyncstats.pfsyncs_badstate++; 1283 return; 1284 } 1285 #endif 1286 1287 static int 1288 pfsync_in_eof(struct pfsync_pkt *pkt, struct mbuf *m, int offset, int count) 1289 { 1290 /* check if we are at the right place in the packet */ 1291 if (offset != m->m_pkthdr.len) 1292 V_pfsyncstats.pfsyncs_badlen++; 1293 1294 /* we're done. free and let the caller return */ 1295 m_freem(m); 1296 return (-1); 1297 } 1298 1299 static int 1300 pfsync_in_error(struct pfsync_pkt *pkt, struct mbuf *m, int offset, int count) 1301 { 1302 V_pfsyncstats.pfsyncs_badact++; 1303 1304 m_freem(m); 1305 return (-1); 1306 } 1307 1308 static int 1309 pfsyncoutput(struct ifnet *ifp, struct mbuf *m, const struct sockaddr *dst, 1310 struct route *rt) 1311 { 1312 m_freem(m); 1313 return (0); 1314 } 1315 1316 /* ARGSUSED */ 1317 static int 1318 pfsyncioctl(struct ifnet *ifp, u_long cmd, caddr_t data) 1319 { 1320 struct pfsync_softc *sc = ifp->if_softc; 1321 struct ifreq *ifr = (struct ifreq *)data; 1322 struct pfsyncreq pfsyncr; 1323 int error; 1324 int c; 1325 1326 switch (cmd) { 1327 case SIOCSIFFLAGS: 1328 PFSYNC_LOCK(sc); 1329 if (ifp->if_flags & IFF_UP) { 1330 ifp->if_drv_flags |= IFF_DRV_RUNNING; 1331 PFSYNC_UNLOCK(sc); 1332 pfsync_pointers_init(); 1333 } else { 1334 ifp->if_drv_flags &= ~IFF_DRV_RUNNING; 1335 PFSYNC_UNLOCK(sc); 1336 pfsync_pointers_uninit(); 1337 } 1338 break; 1339 case SIOCSIFMTU: 1340 if (!sc->sc_sync_if || 1341 ifr->ifr_mtu <= PFSYNC_MINPKT || 1342 ifr->ifr_mtu > sc->sc_sync_if->if_mtu) 1343 return (EINVAL); 1344 if (ifr->ifr_mtu < ifp->if_mtu) { 1345 for (c = 0; c < pfsync_buckets; c++) { 1346 PFSYNC_BUCKET_LOCK(&sc->sc_buckets[c]); 1347 if (sc->sc_buckets[c].b_len > PFSYNC_MINPKT) 1348 pfsync_sendout(1, c); 1349 PFSYNC_BUCKET_UNLOCK(&sc->sc_buckets[c]); 1350 } 1351 } 1352 ifp->if_mtu = ifr->ifr_mtu; 1353 break; 1354 case SIOCGETPFSYNC: 1355 bzero(&pfsyncr, sizeof(pfsyncr)); 1356 PFSYNC_LOCK(sc); 1357 if (sc->sc_sync_if) { 1358 strlcpy(pfsyncr.pfsyncr_syncdev, 1359 sc->sc_sync_if->if_xname, IFNAMSIZ); 1360 } 1361 pfsyncr.pfsyncr_syncpeer = sc->sc_sync_peer; 1362 pfsyncr.pfsyncr_maxupdates = sc->sc_maxupdates; 1363 pfsyncr.pfsyncr_defer = sc->sc_flags; 1364 PFSYNC_UNLOCK(sc); 1365 return (copyout(&pfsyncr, ifr_data_get_ptr(ifr), 1366 sizeof(pfsyncr))); 1367 1368 case SIOCSETPFSYNC: 1369 { 1370 struct in_mfilter *imf = NULL; 1371 struct ifnet *sifp; 1372 struct ip *ip; 1373 1374 if ((error = priv_check(curthread, PRIV_NETINET_PF)) != 0) 1375 return (error); 1376 if ((error = copyin(ifr_data_get_ptr(ifr), &pfsyncr, 1377 sizeof(pfsyncr)))) 1378 return (error); 1379 1380 if (pfsyncr.pfsyncr_maxupdates > 255) 1381 return (EINVAL); 1382 1383 if (pfsyncr.pfsyncr_syncdev[0] == 0) 1384 sifp = NULL; 1385 else if ((sifp = ifunit_ref(pfsyncr.pfsyncr_syncdev)) == NULL) 1386 return (EINVAL); 1387 1388 if (sifp != NULL && ( 1389 pfsyncr.pfsyncr_syncpeer.s_addr == 0 || 1390 pfsyncr.pfsyncr_syncpeer.s_addr == 1391 htonl(INADDR_PFSYNC_GROUP))) 1392 imf = ip_mfilter_alloc(M_WAITOK, 0, 0); 1393 1394 PFSYNC_LOCK(sc); 1395 if (pfsyncr.pfsyncr_syncpeer.s_addr == 0) 1396 sc->sc_sync_peer.s_addr = htonl(INADDR_PFSYNC_GROUP); 1397 else 1398 sc->sc_sync_peer.s_addr = 1399 pfsyncr.pfsyncr_syncpeer.s_addr; 1400 1401 sc->sc_maxupdates = pfsyncr.pfsyncr_maxupdates; 1402 if (pfsyncr.pfsyncr_defer & PFSYNCF_DEFER) { 1403 sc->sc_flags |= PFSYNCF_DEFER; 1404 V_pfsync_defer_ptr = pfsync_defer; 1405 } else { 1406 sc->sc_flags &= ~PFSYNCF_DEFER; 1407 V_pfsync_defer_ptr = NULL; 1408 } 1409 1410 if (sifp == NULL) { 1411 if (sc->sc_sync_if) 1412 if_rele(sc->sc_sync_if); 1413 sc->sc_sync_if = NULL; 1414 pfsync_multicast_cleanup(sc); 1415 PFSYNC_UNLOCK(sc); 1416 break; 1417 } 1418 1419 for (c = 0; c < pfsync_buckets; c++) { 1420 PFSYNC_BUCKET_LOCK(&sc->sc_buckets[c]); 1421 if (sc->sc_buckets[c].b_len > PFSYNC_MINPKT && 1422 (sifp->if_mtu < sc->sc_ifp->if_mtu || 1423 (sc->sc_sync_if != NULL && 1424 sifp->if_mtu < sc->sc_sync_if->if_mtu) || 1425 sifp->if_mtu < MCLBYTES - sizeof(struct ip))) 1426 pfsync_sendout(1, c); 1427 PFSYNC_BUCKET_UNLOCK(&sc->sc_buckets[c]); 1428 } 1429 1430 pfsync_multicast_cleanup(sc); 1431 1432 if (sc->sc_sync_peer.s_addr == htonl(INADDR_PFSYNC_GROUP)) { 1433 error = pfsync_multicast_setup(sc, sifp, imf); 1434 if (error) { 1435 if_rele(sifp); 1436 ip_mfilter_free(imf); 1437 PFSYNC_UNLOCK(sc); 1438 return (error); 1439 } 1440 } 1441 if (sc->sc_sync_if) 1442 if_rele(sc->sc_sync_if); 1443 sc->sc_sync_if = sifp; 1444 1445 ip = &sc->sc_template; 1446 bzero(ip, sizeof(*ip)); 1447 ip->ip_v = IPVERSION; 1448 ip->ip_hl = sizeof(sc->sc_template) >> 2; 1449 ip->ip_tos = IPTOS_LOWDELAY; 1450 /* len and id are set later. */ 1451 ip->ip_off = htons(IP_DF); 1452 ip->ip_ttl = PFSYNC_DFLTTL; 1453 ip->ip_p = IPPROTO_PFSYNC; 1454 ip->ip_src.s_addr = INADDR_ANY; 1455 ip->ip_dst.s_addr = sc->sc_sync_peer.s_addr; 1456 1457 /* Request a full state table update. */ 1458 if ((sc->sc_flags & PFSYNCF_OK) && carp_demote_adj_p) 1459 (*carp_demote_adj_p)(V_pfsync_carp_adj, 1460 "pfsync bulk start"); 1461 sc->sc_flags &= ~PFSYNCF_OK; 1462 if (V_pf_status.debug >= PF_DEBUG_MISC) 1463 printf("pfsync: requesting bulk update\n"); 1464 PFSYNC_UNLOCK(sc); 1465 PFSYNC_BUCKET_LOCK(&sc->sc_buckets[0]); 1466 pfsync_request_update(0, 0); 1467 PFSYNC_BUCKET_UNLOCK(&sc->sc_buckets[0]); 1468 PFSYNC_BLOCK(sc); 1469 sc->sc_ureq_sent = time_uptime; 1470 callout_reset(&sc->sc_bulkfail_tmo, 5 * hz, pfsync_bulk_fail, 1471 sc); 1472 PFSYNC_BUNLOCK(sc); 1473 1474 break; 1475 } 1476 default: 1477 return (ENOTTY); 1478 } 1479 1480 return (0); 1481 } 1482 1483 static void 1484 pfsync_out_state(struct pf_kstate *st, void *buf) 1485 { 1486 struct pfsync_state *sp = buf; 1487 1488 pfsync_state_export(sp, st); 1489 } 1490 1491 static void 1492 pfsync_out_iack(struct pf_kstate *st, void *buf) 1493 { 1494 struct pfsync_ins_ack *iack = buf; 1495 1496 iack->id = st->id; 1497 iack->creatorid = st->creatorid; 1498 } 1499 1500 static void 1501 pfsync_out_upd_c(struct pf_kstate *st, void *buf) 1502 { 1503 struct pfsync_upd_c *up = buf; 1504 1505 bzero(up, sizeof(*up)); 1506 up->id = st->id; 1507 pf_state_peer_hton(&st->src, &up->src); 1508 pf_state_peer_hton(&st->dst, &up->dst); 1509 up->creatorid = st->creatorid; 1510 up->timeout = st->timeout; 1511 } 1512 1513 static void 1514 pfsync_out_del(struct pf_kstate *st, void *buf) 1515 { 1516 struct pfsync_del_c *dp = buf; 1517 1518 dp->id = st->id; 1519 dp->creatorid = st->creatorid; 1520 st->state_flags |= PFSTATE_NOSYNC; 1521 } 1522 1523 static void 1524 pfsync_drop(struct pfsync_softc *sc) 1525 { 1526 struct pf_kstate *st, *next; 1527 struct pfsync_upd_req_item *ur; 1528 struct pfsync_bucket *b; 1529 int c, q; 1530 1531 for (c = 0; c < pfsync_buckets; c++) { 1532 b = &sc->sc_buckets[c]; 1533 for (q = 0; q < PFSYNC_S_COUNT; q++) { 1534 if (TAILQ_EMPTY(&b->b_qs[q])) 1535 continue; 1536 1537 TAILQ_FOREACH_SAFE(st, &b->b_qs[q], sync_list, next) { 1538 KASSERT(st->sync_state == q, 1539 ("%s: st->sync_state == q", 1540 __func__)); 1541 st->sync_state = PFSYNC_S_NONE; 1542 pf_release_state(st); 1543 } 1544 TAILQ_INIT(&b->b_qs[q]); 1545 } 1546 1547 while ((ur = TAILQ_FIRST(&b->b_upd_req_list)) != NULL) { 1548 TAILQ_REMOVE(&b->b_upd_req_list, ur, ur_entry); 1549 free(ur, M_PFSYNC); 1550 } 1551 1552 b->b_len = PFSYNC_MINPKT; 1553 b->b_plus = NULL; 1554 } 1555 } 1556 1557 static void 1558 pfsync_sendout(int schedswi, int c) 1559 { 1560 struct pfsync_softc *sc = V_pfsyncif; 1561 struct ifnet *ifp = sc->sc_ifp; 1562 struct mbuf *m; 1563 struct ip *ip; 1564 struct pfsync_header *ph; 1565 struct pfsync_subheader *subh; 1566 struct pf_kstate *st, *st_next; 1567 struct pfsync_upd_req_item *ur; 1568 struct pfsync_bucket *b = &sc->sc_buckets[c]; 1569 int offset; 1570 int q, count = 0; 1571 1572 KASSERT(sc != NULL, ("%s: null sc", __func__)); 1573 KASSERT(b->b_len > PFSYNC_MINPKT, 1574 ("%s: sc_len %zu", __func__, b->b_len)); 1575 PFSYNC_BUCKET_LOCK_ASSERT(b); 1576 1577 if (ifp->if_bpf == NULL && sc->sc_sync_if == NULL) { 1578 pfsync_drop(sc); 1579 return; 1580 } 1581 1582 m = m_get2(max_linkhdr + b->b_len, M_NOWAIT, MT_DATA, M_PKTHDR); 1583 if (m == NULL) { 1584 if_inc_counter(sc->sc_ifp, IFCOUNTER_OERRORS, 1); 1585 V_pfsyncstats.pfsyncs_onomem++; 1586 return; 1587 } 1588 m->m_data += max_linkhdr; 1589 m->m_len = m->m_pkthdr.len = b->b_len; 1590 1591 /* build the ip header */ 1592 ip = (struct ip *)m->m_data; 1593 bcopy(&sc->sc_template, ip, sizeof(*ip)); 1594 offset = sizeof(*ip); 1595 1596 ip->ip_len = htons(m->m_pkthdr.len); 1597 ip_fillid(ip); 1598 1599 /* build the pfsync header */ 1600 ph = (struct pfsync_header *)(m->m_data + offset); 1601 bzero(ph, sizeof(*ph)); 1602 offset += sizeof(*ph); 1603 1604 ph->version = PFSYNC_VERSION; 1605 ph->len = htons(b->b_len - sizeof(*ip)); 1606 bcopy(V_pf_status.pf_chksum, ph->pfcksum, PF_MD5_DIGEST_LENGTH); 1607 1608 /* walk the queues */ 1609 for (q = 0; q < PFSYNC_S_COUNT; q++) { 1610 if (TAILQ_EMPTY(&b->b_qs[q])) 1611 continue; 1612 1613 subh = (struct pfsync_subheader *)(m->m_data + offset); 1614 offset += sizeof(*subh); 1615 1616 count = 0; 1617 TAILQ_FOREACH_SAFE(st, &b->b_qs[q], sync_list, st_next) { 1618 KASSERT(st->sync_state == q, 1619 ("%s: st->sync_state == q", 1620 __func__)); 1621 /* 1622 * XXXGL: some of write methods do unlocked reads 1623 * of state data :( 1624 */ 1625 pfsync_qs[q].write(st, m->m_data + offset); 1626 offset += pfsync_qs[q].len; 1627 st->sync_state = PFSYNC_S_NONE; 1628 pf_release_state(st); 1629 count++; 1630 } 1631 TAILQ_INIT(&b->b_qs[q]); 1632 1633 bzero(subh, sizeof(*subh)); 1634 subh->action = pfsync_qs[q].action; 1635 subh->count = htons(count); 1636 V_pfsyncstats.pfsyncs_oacts[pfsync_qs[q].action] += count; 1637 } 1638 1639 if (!TAILQ_EMPTY(&b->b_upd_req_list)) { 1640 subh = (struct pfsync_subheader *)(m->m_data + offset); 1641 offset += sizeof(*subh); 1642 1643 count = 0; 1644 while ((ur = TAILQ_FIRST(&b->b_upd_req_list)) != NULL) { 1645 TAILQ_REMOVE(&b->b_upd_req_list, ur, ur_entry); 1646 1647 bcopy(&ur->ur_msg, m->m_data + offset, 1648 sizeof(ur->ur_msg)); 1649 offset += sizeof(ur->ur_msg); 1650 free(ur, M_PFSYNC); 1651 count++; 1652 } 1653 1654 bzero(subh, sizeof(*subh)); 1655 subh->action = PFSYNC_ACT_UPD_REQ; 1656 subh->count = htons(count); 1657 V_pfsyncstats.pfsyncs_oacts[PFSYNC_ACT_UPD_REQ] += count; 1658 } 1659 1660 /* has someone built a custom region for us to add? */ 1661 if (b->b_plus != NULL) { 1662 bcopy(b->b_plus, m->m_data + offset, b->b_pluslen); 1663 offset += b->b_pluslen; 1664 1665 b->b_plus = NULL; 1666 } 1667 1668 subh = (struct pfsync_subheader *)(m->m_data + offset); 1669 offset += sizeof(*subh); 1670 1671 bzero(subh, sizeof(*subh)); 1672 subh->action = PFSYNC_ACT_EOF; 1673 subh->count = htons(1); 1674 V_pfsyncstats.pfsyncs_oacts[PFSYNC_ACT_EOF]++; 1675 1676 /* we're done, let's put it on the wire */ 1677 if (ifp->if_bpf) { 1678 m->m_data += sizeof(*ip); 1679 m->m_len = m->m_pkthdr.len = b->b_len - sizeof(*ip); 1680 BPF_MTAP(ifp, m); 1681 m->m_data -= sizeof(*ip); 1682 m->m_len = m->m_pkthdr.len = b->b_len; 1683 } 1684 1685 if (sc->sc_sync_if == NULL) { 1686 b->b_len = PFSYNC_MINPKT; 1687 m_freem(m); 1688 return; 1689 } 1690 1691 if_inc_counter(sc->sc_ifp, IFCOUNTER_OPACKETS, 1); 1692 if_inc_counter(sc->sc_ifp, IFCOUNTER_OBYTES, m->m_pkthdr.len); 1693 b->b_len = PFSYNC_MINPKT; 1694 1695 if (!_IF_QFULL(&b->b_snd)) 1696 _IF_ENQUEUE(&b->b_snd, m); 1697 else { 1698 m_freem(m); 1699 if_inc_counter(sc->sc_ifp, IFCOUNTER_OQDROPS, 1); 1700 } 1701 if (schedswi) 1702 swi_sched(V_pfsync_swi_cookie, 0); 1703 } 1704 1705 static void 1706 pfsync_insert_state(struct pf_kstate *st) 1707 { 1708 struct pfsync_softc *sc = V_pfsyncif; 1709 struct pfsync_bucket *b = pfsync_get_bucket(sc, st); 1710 1711 if (st->state_flags & PFSTATE_NOSYNC) 1712 return; 1713 1714 if ((st->rule.ptr->rule_flag & PFRULE_NOSYNC) || 1715 st->key[PF_SK_WIRE]->proto == IPPROTO_PFSYNC) { 1716 st->state_flags |= PFSTATE_NOSYNC; 1717 return; 1718 } 1719 1720 KASSERT(st->sync_state == PFSYNC_S_NONE, 1721 ("%s: st->sync_state %u", __func__, st->sync_state)); 1722 1723 PFSYNC_BUCKET_LOCK(b); 1724 if (b->b_len == PFSYNC_MINPKT) 1725 callout_reset(&b->b_tmo, 1 * hz, pfsync_timeout, b); 1726 1727 pfsync_q_ins(st, PFSYNC_S_INS, true); 1728 PFSYNC_BUCKET_UNLOCK(b); 1729 1730 st->sync_updates = 0; 1731 } 1732 1733 static int 1734 pfsync_defer(struct pf_kstate *st, struct mbuf *m) 1735 { 1736 struct pfsync_softc *sc = V_pfsyncif; 1737 struct pfsync_deferral *pd; 1738 struct pfsync_bucket *b = pfsync_get_bucket(sc, st); 1739 1740 if (m->m_flags & (M_BCAST|M_MCAST)) 1741 return (0); 1742 1743 if (sc == NULL) 1744 return (0); 1745 1746 PFSYNC_LOCK(sc); 1747 1748 if (!(sc->sc_ifp->if_drv_flags & IFF_DRV_RUNNING) || 1749 !(sc->sc_flags & PFSYNCF_DEFER)) { 1750 PFSYNC_UNLOCK(sc); 1751 return (0); 1752 } 1753 1754 PFSYNC_BUCKET_LOCK(b); 1755 PFSYNC_UNLOCK(sc); 1756 1757 if (b->b_deferred >= 128) 1758 pfsync_undefer(TAILQ_FIRST(&b->b_deferrals), 0); 1759 1760 pd = malloc(sizeof(*pd), M_PFSYNC, M_NOWAIT); 1761 if (pd == NULL) { 1762 PFSYNC_BUCKET_UNLOCK(b); 1763 return (0); 1764 } 1765 b->b_deferred++; 1766 1767 m->m_flags |= M_SKIP_FIREWALL; 1768 st->state_flags |= PFSTATE_ACK; 1769 1770 pd->pd_sc = sc; 1771 pd->pd_refs = 0; 1772 pd->pd_st = st; 1773 pf_ref_state(st); 1774 pd->pd_m = m; 1775 1776 TAILQ_INSERT_TAIL(&b->b_deferrals, pd, pd_entry); 1777 callout_init_mtx(&pd->pd_tmo, &b->b_mtx, CALLOUT_RETURNUNLOCKED); 1778 callout_reset(&pd->pd_tmo, PFSYNC_DEFER_TIMEOUT, pfsync_defer_tmo, pd); 1779 1780 pfsync_push(b); 1781 PFSYNC_BUCKET_UNLOCK(b); 1782 1783 return (1); 1784 } 1785 1786 static void 1787 pfsync_undefer(struct pfsync_deferral *pd, int drop) 1788 { 1789 struct pfsync_softc *sc = pd->pd_sc; 1790 struct mbuf *m = pd->pd_m; 1791 struct pf_kstate *st = pd->pd_st; 1792 struct pfsync_bucket *b = pfsync_get_bucket(sc, st); 1793 1794 PFSYNC_BUCKET_LOCK_ASSERT(b); 1795 1796 TAILQ_REMOVE(&b->b_deferrals, pd, pd_entry); 1797 b->b_deferred--; 1798 pd->pd_st->state_flags &= ~PFSTATE_ACK; /* XXX: locking! */ 1799 free(pd, M_PFSYNC); 1800 pf_release_state(st); 1801 1802 if (drop) 1803 m_freem(m); 1804 else { 1805 _IF_ENQUEUE(&b->b_snd, m); 1806 pfsync_push(b); 1807 } 1808 } 1809 1810 static void 1811 pfsync_defer_tmo(void *arg) 1812 { 1813 struct epoch_tracker et; 1814 struct pfsync_deferral *pd = arg; 1815 struct pfsync_softc *sc = pd->pd_sc; 1816 struct mbuf *m = pd->pd_m; 1817 struct pf_kstate *st = pd->pd_st; 1818 struct pfsync_bucket *b = pfsync_get_bucket(sc, st); 1819 1820 PFSYNC_BUCKET_LOCK_ASSERT(b); 1821 1822 NET_EPOCH_ENTER(et); 1823 CURVNET_SET(m->m_pkthdr.rcvif->if_vnet); 1824 1825 TAILQ_REMOVE(&b->b_deferrals, pd, pd_entry); 1826 b->b_deferred--; 1827 pd->pd_st->state_flags &= ~PFSTATE_ACK; /* XXX: locking! */ 1828 if (pd->pd_refs == 0) 1829 free(pd, M_PFSYNC); 1830 PFSYNC_BUCKET_UNLOCK(b); 1831 1832 ip_output(m, NULL, NULL, 0, NULL, NULL); 1833 1834 pf_release_state(st); 1835 1836 CURVNET_RESTORE(); 1837 NET_EPOCH_EXIT(et); 1838 } 1839 1840 static void 1841 pfsync_undefer_state(struct pf_kstate *st, int drop) 1842 { 1843 struct pfsync_softc *sc = V_pfsyncif; 1844 struct pfsync_deferral *pd; 1845 struct pfsync_bucket *b = pfsync_get_bucket(sc, st); 1846 1847 PFSYNC_BUCKET_LOCK(b); 1848 1849 TAILQ_FOREACH(pd, &b->b_deferrals, pd_entry) { 1850 if (pd->pd_st == st) { 1851 if (callout_stop(&pd->pd_tmo) > 0) 1852 pfsync_undefer(pd, drop); 1853 1854 PFSYNC_BUCKET_UNLOCK(b); 1855 return; 1856 } 1857 } 1858 PFSYNC_BUCKET_UNLOCK(b); 1859 1860 panic("%s: unable to find deferred state", __func__); 1861 } 1862 1863 static struct pfsync_bucket* 1864 pfsync_get_bucket(struct pfsync_softc *sc, struct pf_kstate *st) 1865 { 1866 int c = PF_IDHASH(st) % pfsync_buckets; 1867 return &sc->sc_buckets[c]; 1868 } 1869 1870 static void 1871 pfsync_update_state(struct pf_kstate *st) 1872 { 1873 struct pfsync_softc *sc = V_pfsyncif; 1874 bool sync = false, ref = true; 1875 struct pfsync_bucket *b = pfsync_get_bucket(sc, st); 1876 1877 PF_STATE_LOCK_ASSERT(st); 1878 PFSYNC_BUCKET_LOCK(b); 1879 1880 if (st->state_flags & PFSTATE_ACK) 1881 pfsync_undefer_state(st, 0); 1882 if (st->state_flags & PFSTATE_NOSYNC) { 1883 if (st->sync_state != PFSYNC_S_NONE) 1884 pfsync_q_del(st, true, b); 1885 PFSYNC_BUCKET_UNLOCK(b); 1886 return; 1887 } 1888 1889 if (b->b_len == PFSYNC_MINPKT) 1890 callout_reset(&b->b_tmo, 1 * hz, pfsync_timeout, b); 1891 1892 switch (st->sync_state) { 1893 case PFSYNC_S_UPD_C: 1894 case PFSYNC_S_UPD: 1895 case PFSYNC_S_INS: 1896 /* we're already handling it */ 1897 1898 if (st->key[PF_SK_WIRE]->proto == IPPROTO_TCP) { 1899 st->sync_updates++; 1900 if (st->sync_updates >= sc->sc_maxupdates) 1901 sync = true; 1902 } 1903 break; 1904 1905 case PFSYNC_S_IACK: 1906 pfsync_q_del(st, false, b); 1907 ref = false; 1908 /* FALLTHROUGH */ 1909 1910 case PFSYNC_S_NONE: 1911 pfsync_q_ins(st, PFSYNC_S_UPD_C, ref); 1912 st->sync_updates = 0; 1913 break; 1914 1915 default: 1916 panic("%s: unexpected sync state %d", __func__, st->sync_state); 1917 } 1918 1919 if (sync || (time_uptime - st->pfsync_time) < 2) 1920 pfsync_push(b); 1921 1922 PFSYNC_BUCKET_UNLOCK(b); 1923 } 1924 1925 static void 1926 pfsync_request_update(u_int32_t creatorid, u_int64_t id) 1927 { 1928 struct pfsync_softc *sc = V_pfsyncif; 1929 struct pfsync_bucket *b = &sc->sc_buckets[0]; 1930 struct pfsync_upd_req_item *item; 1931 size_t nlen = sizeof(struct pfsync_upd_req); 1932 1933 PFSYNC_BUCKET_LOCK_ASSERT(b); 1934 1935 /* 1936 * This code does a bit to prevent multiple update requests for the 1937 * same state being generated. It searches current subheader queue, 1938 * but it doesn't lookup into queue of already packed datagrams. 1939 */ 1940 TAILQ_FOREACH(item, &b->b_upd_req_list, ur_entry) 1941 if (item->ur_msg.id == id && 1942 item->ur_msg.creatorid == creatorid) 1943 return; 1944 1945 item = malloc(sizeof(*item), M_PFSYNC, M_NOWAIT); 1946 if (item == NULL) 1947 return; /* XXX stats */ 1948 1949 item->ur_msg.id = id; 1950 item->ur_msg.creatorid = creatorid; 1951 1952 if (TAILQ_EMPTY(&b->b_upd_req_list)) 1953 nlen += sizeof(struct pfsync_subheader); 1954 1955 if (b->b_len + nlen > sc->sc_ifp->if_mtu) { 1956 pfsync_sendout(0, 0); 1957 1958 nlen = sizeof(struct pfsync_subheader) + 1959 sizeof(struct pfsync_upd_req); 1960 } 1961 1962 TAILQ_INSERT_TAIL(&b->b_upd_req_list, item, ur_entry); 1963 b->b_len += nlen; 1964 1965 pfsync_push(b); 1966 } 1967 1968 static bool 1969 pfsync_update_state_req(struct pf_kstate *st) 1970 { 1971 struct pfsync_softc *sc = V_pfsyncif; 1972 bool ref = true, full = false; 1973 struct pfsync_bucket *b = pfsync_get_bucket(sc, st); 1974 1975 PF_STATE_LOCK_ASSERT(st); 1976 PFSYNC_BUCKET_LOCK(b); 1977 1978 if (st->state_flags & PFSTATE_NOSYNC) { 1979 if (st->sync_state != PFSYNC_S_NONE) 1980 pfsync_q_del(st, true, b); 1981 PFSYNC_BUCKET_UNLOCK(b); 1982 return (full); 1983 } 1984 1985 switch (st->sync_state) { 1986 case PFSYNC_S_UPD_C: 1987 case PFSYNC_S_IACK: 1988 pfsync_q_del(st, false, b); 1989 ref = false; 1990 /* FALLTHROUGH */ 1991 1992 case PFSYNC_S_NONE: 1993 pfsync_q_ins(st, PFSYNC_S_UPD, ref); 1994 pfsync_push(b); 1995 break; 1996 1997 case PFSYNC_S_INS: 1998 case PFSYNC_S_UPD: 1999 case PFSYNC_S_DEL: 2000 /* we're already handling it */ 2001 break; 2002 2003 default: 2004 panic("%s: unexpected sync state %d", __func__, st->sync_state); 2005 } 2006 2007 if ((sc->sc_ifp->if_mtu - b->b_len) < sizeof(struct pfsync_state)) 2008 full = true; 2009 2010 PFSYNC_BUCKET_UNLOCK(b); 2011 2012 return (full); 2013 } 2014 2015 static void 2016 pfsync_delete_state(struct pf_kstate *st) 2017 { 2018 struct pfsync_softc *sc = V_pfsyncif; 2019 struct pfsync_bucket *b = pfsync_get_bucket(sc, st); 2020 bool ref = true; 2021 2022 PFSYNC_BUCKET_LOCK(b); 2023 if (st->state_flags & PFSTATE_ACK) 2024 pfsync_undefer_state(st, 1); 2025 if (st->state_flags & PFSTATE_NOSYNC) { 2026 if (st->sync_state != PFSYNC_S_NONE) 2027 pfsync_q_del(st, true, b); 2028 PFSYNC_BUCKET_UNLOCK(b); 2029 return; 2030 } 2031 2032 if (b->b_len == PFSYNC_MINPKT) 2033 callout_reset(&b->b_tmo, 1 * hz, pfsync_timeout, b); 2034 2035 switch (st->sync_state) { 2036 case PFSYNC_S_INS: 2037 /* We never got to tell the world so just forget about it. */ 2038 pfsync_q_del(st, true, b); 2039 break; 2040 2041 case PFSYNC_S_UPD_C: 2042 case PFSYNC_S_UPD: 2043 case PFSYNC_S_IACK: 2044 pfsync_q_del(st, false, b); 2045 ref = false; 2046 /* FALLTHROUGH */ 2047 2048 case PFSYNC_S_NONE: 2049 pfsync_q_ins(st, PFSYNC_S_DEL, ref); 2050 break; 2051 2052 default: 2053 panic("%s: unexpected sync state %d", __func__, st->sync_state); 2054 } 2055 2056 PFSYNC_BUCKET_UNLOCK(b); 2057 } 2058 2059 static void 2060 pfsync_clear_states(u_int32_t creatorid, const char *ifname) 2061 { 2062 struct { 2063 struct pfsync_subheader subh; 2064 struct pfsync_clr clr; 2065 } __packed r; 2066 2067 bzero(&r, sizeof(r)); 2068 2069 r.subh.action = PFSYNC_ACT_CLR; 2070 r.subh.count = htons(1); 2071 V_pfsyncstats.pfsyncs_oacts[PFSYNC_ACT_CLR]++; 2072 2073 strlcpy(r.clr.ifname, ifname, sizeof(r.clr.ifname)); 2074 r.clr.creatorid = creatorid; 2075 2076 pfsync_send_plus(&r, sizeof(r)); 2077 } 2078 2079 static void 2080 pfsync_q_ins(struct pf_kstate *st, int q, bool ref) 2081 { 2082 struct pfsync_softc *sc = V_pfsyncif; 2083 size_t nlen = pfsync_qs[q].len; 2084 struct pfsync_bucket *b = pfsync_get_bucket(sc, st); 2085 2086 PFSYNC_BUCKET_LOCK_ASSERT(b); 2087 2088 KASSERT(st->sync_state == PFSYNC_S_NONE, 2089 ("%s: st->sync_state %u", __func__, st->sync_state)); 2090 KASSERT(b->b_len >= PFSYNC_MINPKT, ("pfsync pkt len is too low %zu", 2091 b->b_len)); 2092 2093 if (TAILQ_EMPTY(&b->b_qs[q])) 2094 nlen += sizeof(struct pfsync_subheader); 2095 2096 if (b->b_len + nlen > sc->sc_ifp->if_mtu) { 2097 pfsync_sendout(1, b->b_id); 2098 2099 nlen = sizeof(struct pfsync_subheader) + pfsync_qs[q].len; 2100 } 2101 2102 b->b_len += nlen; 2103 TAILQ_INSERT_TAIL(&b->b_qs[q], st, sync_list); 2104 st->sync_state = q; 2105 if (ref) 2106 pf_ref_state(st); 2107 } 2108 2109 static void 2110 pfsync_q_del(struct pf_kstate *st, bool unref, struct pfsync_bucket *b) 2111 { 2112 int q = st->sync_state; 2113 2114 PFSYNC_BUCKET_LOCK_ASSERT(b); 2115 KASSERT(st->sync_state != PFSYNC_S_NONE, 2116 ("%s: st->sync_state != PFSYNC_S_NONE", __func__)); 2117 2118 b->b_len -= pfsync_qs[q].len; 2119 TAILQ_REMOVE(&b->b_qs[q], st, sync_list); 2120 st->sync_state = PFSYNC_S_NONE; 2121 if (unref) 2122 pf_release_state(st); 2123 2124 if (TAILQ_EMPTY(&b->b_qs[q])) 2125 b->b_len -= sizeof(struct pfsync_subheader); 2126 } 2127 2128 static void 2129 pfsync_bulk_start(void) 2130 { 2131 struct pfsync_softc *sc = V_pfsyncif; 2132 2133 if (V_pf_status.debug >= PF_DEBUG_MISC) 2134 printf("pfsync: received bulk update request\n"); 2135 2136 PFSYNC_BLOCK(sc); 2137 2138 sc->sc_ureq_received = time_uptime; 2139 sc->sc_bulk_hashid = 0; 2140 sc->sc_bulk_stateid = 0; 2141 pfsync_bulk_status(PFSYNC_BUS_START); 2142 callout_reset(&sc->sc_bulk_tmo, 1, pfsync_bulk_update, sc); 2143 PFSYNC_BUNLOCK(sc); 2144 } 2145 2146 static void 2147 pfsync_bulk_update(void *arg) 2148 { 2149 struct pfsync_softc *sc = arg; 2150 struct pf_kstate *s; 2151 int i, sent = 0; 2152 2153 PFSYNC_BLOCK_ASSERT(sc); 2154 CURVNET_SET(sc->sc_ifp->if_vnet); 2155 2156 /* 2157 * Start with last state from previous invocation. 2158 * It may had gone, in this case start from the 2159 * hash slot. 2160 */ 2161 s = pf_find_state_byid(sc->sc_bulk_stateid, sc->sc_bulk_creatorid); 2162 2163 if (s != NULL) 2164 i = PF_IDHASH(s); 2165 else 2166 i = sc->sc_bulk_hashid; 2167 2168 for (; i <= pf_hashmask; i++) { 2169 struct pf_idhash *ih = &V_pf_idhash[i]; 2170 2171 if (s != NULL) 2172 PF_HASHROW_ASSERT(ih); 2173 else { 2174 PF_HASHROW_LOCK(ih); 2175 s = LIST_FIRST(&ih->states); 2176 } 2177 2178 for (; s; s = LIST_NEXT(s, entry)) { 2179 if (s->sync_state == PFSYNC_S_NONE && 2180 s->timeout < PFTM_MAX && 2181 s->pfsync_time <= sc->sc_ureq_received) { 2182 if (pfsync_update_state_req(s)) { 2183 /* We've filled a packet. */ 2184 sc->sc_bulk_hashid = i; 2185 sc->sc_bulk_stateid = s->id; 2186 sc->sc_bulk_creatorid = s->creatorid; 2187 PF_HASHROW_UNLOCK(ih); 2188 callout_reset(&sc->sc_bulk_tmo, 1, 2189 pfsync_bulk_update, sc); 2190 goto full; 2191 } 2192 sent++; 2193 } 2194 } 2195 PF_HASHROW_UNLOCK(ih); 2196 } 2197 2198 /* We're done. */ 2199 pfsync_bulk_status(PFSYNC_BUS_END); 2200 full: 2201 CURVNET_RESTORE(); 2202 } 2203 2204 static void 2205 pfsync_bulk_status(u_int8_t status) 2206 { 2207 struct { 2208 struct pfsync_subheader subh; 2209 struct pfsync_bus bus; 2210 } __packed r; 2211 2212 struct pfsync_softc *sc = V_pfsyncif; 2213 2214 bzero(&r, sizeof(r)); 2215 2216 r.subh.action = PFSYNC_ACT_BUS; 2217 r.subh.count = htons(1); 2218 V_pfsyncstats.pfsyncs_oacts[PFSYNC_ACT_BUS]++; 2219 2220 r.bus.creatorid = V_pf_status.hostid; 2221 r.bus.endtime = htonl(time_uptime - sc->sc_ureq_received); 2222 r.bus.status = status; 2223 2224 pfsync_send_plus(&r, sizeof(r)); 2225 } 2226 2227 static void 2228 pfsync_bulk_fail(void *arg) 2229 { 2230 struct pfsync_softc *sc = arg; 2231 struct pfsync_bucket *b = &sc->sc_buckets[0]; 2232 2233 CURVNET_SET(sc->sc_ifp->if_vnet); 2234 2235 PFSYNC_BLOCK_ASSERT(sc); 2236 2237 if (sc->sc_bulk_tries++ < PFSYNC_MAX_BULKTRIES) { 2238 /* Try again */ 2239 callout_reset(&sc->sc_bulkfail_tmo, 5 * hz, 2240 pfsync_bulk_fail, V_pfsyncif); 2241 PFSYNC_BUCKET_LOCK(b); 2242 pfsync_request_update(0, 0); 2243 PFSYNC_BUCKET_UNLOCK(b); 2244 } else { 2245 /* Pretend like the transfer was ok. */ 2246 sc->sc_ureq_sent = 0; 2247 sc->sc_bulk_tries = 0; 2248 PFSYNC_LOCK(sc); 2249 if (!(sc->sc_flags & PFSYNCF_OK) && carp_demote_adj_p) 2250 (*carp_demote_adj_p)(-V_pfsync_carp_adj, 2251 "pfsync bulk fail"); 2252 sc->sc_flags |= PFSYNCF_OK; 2253 PFSYNC_UNLOCK(sc); 2254 if (V_pf_status.debug >= PF_DEBUG_MISC) 2255 printf("pfsync: failed to receive bulk update\n"); 2256 } 2257 2258 CURVNET_RESTORE(); 2259 } 2260 2261 static void 2262 pfsync_send_plus(void *plus, size_t pluslen) 2263 { 2264 struct pfsync_softc *sc = V_pfsyncif; 2265 struct pfsync_bucket *b = &sc->sc_buckets[0]; 2266 2267 PFSYNC_BUCKET_LOCK(b); 2268 2269 if (b->b_len + pluslen > sc->sc_ifp->if_mtu) 2270 pfsync_sendout(1, b->b_id); 2271 2272 b->b_plus = plus; 2273 b->b_len += (b->b_pluslen = pluslen); 2274 2275 pfsync_sendout(1, b->b_id); 2276 PFSYNC_BUCKET_UNLOCK(b); 2277 } 2278 2279 static void 2280 pfsync_timeout(void *arg) 2281 { 2282 struct pfsync_bucket *b = arg; 2283 2284 CURVNET_SET(b->b_sc->sc_ifp->if_vnet); 2285 PFSYNC_BUCKET_LOCK(b); 2286 pfsync_push(b); 2287 PFSYNC_BUCKET_UNLOCK(b); 2288 CURVNET_RESTORE(); 2289 } 2290 2291 static void 2292 pfsync_push(struct pfsync_bucket *b) 2293 { 2294 2295 PFSYNC_BUCKET_LOCK_ASSERT(b); 2296 2297 b->b_flags |= PFSYNCF_BUCKET_PUSH; 2298 swi_sched(V_pfsync_swi_cookie, 0); 2299 } 2300 2301 static void 2302 pfsync_push_all(struct pfsync_softc *sc) 2303 { 2304 int c; 2305 struct pfsync_bucket *b; 2306 2307 for (c = 0; c < pfsync_buckets; c++) { 2308 b = &sc->sc_buckets[c]; 2309 2310 PFSYNC_BUCKET_LOCK(b); 2311 pfsync_push(b); 2312 PFSYNC_BUCKET_UNLOCK(b); 2313 } 2314 } 2315 2316 static void 2317 pfsyncintr(void *arg) 2318 { 2319 struct epoch_tracker et; 2320 struct pfsync_softc *sc = arg; 2321 struct pfsync_bucket *b; 2322 struct mbuf *m, *n; 2323 int c; 2324 2325 NET_EPOCH_ENTER(et); 2326 CURVNET_SET(sc->sc_ifp->if_vnet); 2327 2328 for (c = 0; c < pfsync_buckets; c++) { 2329 b = &sc->sc_buckets[c]; 2330 2331 PFSYNC_BUCKET_LOCK(b); 2332 if ((b->b_flags & PFSYNCF_BUCKET_PUSH) && b->b_len > PFSYNC_MINPKT) { 2333 pfsync_sendout(0, b->b_id); 2334 b->b_flags &= ~PFSYNCF_BUCKET_PUSH; 2335 } 2336 _IF_DEQUEUE_ALL(&b->b_snd, m); 2337 PFSYNC_BUCKET_UNLOCK(b); 2338 2339 for (; m != NULL; m = n) { 2340 n = m->m_nextpkt; 2341 m->m_nextpkt = NULL; 2342 2343 /* 2344 * We distinguish between a deferral packet and our 2345 * own pfsync packet based on M_SKIP_FIREWALL 2346 * flag. This is XXX. 2347 */ 2348 if (m->m_flags & M_SKIP_FIREWALL) 2349 ip_output(m, NULL, NULL, 0, NULL, NULL); 2350 else if (ip_output(m, NULL, NULL, IP_RAWOUTPUT, &sc->sc_imo, 2351 NULL) == 0) 2352 V_pfsyncstats.pfsyncs_opackets++; 2353 else 2354 V_pfsyncstats.pfsyncs_oerrors++; 2355 } 2356 } 2357 CURVNET_RESTORE(); 2358 NET_EPOCH_EXIT(et); 2359 } 2360 2361 static int 2362 pfsync_multicast_setup(struct pfsync_softc *sc, struct ifnet *ifp, 2363 struct in_mfilter *imf) 2364 { 2365 struct ip_moptions *imo = &sc->sc_imo; 2366 int error; 2367 2368 if (!(ifp->if_flags & IFF_MULTICAST)) 2369 return (EADDRNOTAVAIL); 2370 2371 imo->imo_multicast_vif = -1; 2372 2373 if ((error = in_joingroup(ifp, &sc->sc_sync_peer, NULL, 2374 &imf->imf_inm)) != 0) 2375 return (error); 2376 2377 ip_mfilter_init(&imo->imo_head); 2378 ip_mfilter_insert(&imo->imo_head, imf); 2379 imo->imo_multicast_ifp = ifp; 2380 imo->imo_multicast_ttl = PFSYNC_DFLTTL; 2381 imo->imo_multicast_loop = 0; 2382 2383 return (0); 2384 } 2385 2386 static void 2387 pfsync_multicast_cleanup(struct pfsync_softc *sc) 2388 { 2389 struct ip_moptions *imo = &sc->sc_imo; 2390 struct in_mfilter *imf; 2391 2392 while ((imf = ip_mfilter_first(&imo->imo_head)) != NULL) { 2393 ip_mfilter_remove(&imo->imo_head, imf); 2394 in_leavegroup(imf->imf_inm, NULL); 2395 ip_mfilter_free(imf); 2396 } 2397 imo->imo_multicast_ifp = NULL; 2398 } 2399 2400 void 2401 pfsync_detach_ifnet(struct ifnet *ifp) 2402 { 2403 struct pfsync_softc *sc = V_pfsyncif; 2404 2405 if (sc == NULL) 2406 return; 2407 2408 PFSYNC_LOCK(sc); 2409 2410 if (sc->sc_sync_if == ifp) { 2411 /* We don't need mutlicast cleanup here, because the interface 2412 * is going away. We do need to ensure we don't try to do 2413 * cleanup later. 2414 */ 2415 ip_mfilter_init(&sc->sc_imo.imo_head); 2416 sc->sc_imo.imo_multicast_ifp = NULL; 2417 sc->sc_sync_if = NULL; 2418 } 2419 2420 PFSYNC_UNLOCK(sc); 2421 } 2422 2423 #ifdef INET 2424 extern struct domain inetdomain; 2425 static struct protosw in_pfsync_protosw = { 2426 .pr_type = SOCK_RAW, 2427 .pr_domain = &inetdomain, 2428 .pr_protocol = IPPROTO_PFSYNC, 2429 .pr_flags = PR_ATOMIC|PR_ADDR, 2430 .pr_input = pfsync_input, 2431 .pr_output = rip_output, 2432 .pr_ctloutput = rip_ctloutput, 2433 .pr_usrreqs = &rip_usrreqs 2434 }; 2435 #endif 2436 2437 static void 2438 pfsync_pointers_init() 2439 { 2440 2441 PF_RULES_WLOCK(); 2442 V_pfsync_state_import_ptr = pfsync_state_import; 2443 V_pfsync_insert_state_ptr = pfsync_insert_state; 2444 V_pfsync_update_state_ptr = pfsync_update_state; 2445 V_pfsync_delete_state_ptr = pfsync_delete_state; 2446 V_pfsync_clear_states_ptr = pfsync_clear_states; 2447 V_pfsync_defer_ptr = pfsync_defer; 2448 PF_RULES_WUNLOCK(); 2449 } 2450 2451 static void 2452 pfsync_pointers_uninit() 2453 { 2454 2455 PF_RULES_WLOCK(); 2456 V_pfsync_state_import_ptr = NULL; 2457 V_pfsync_insert_state_ptr = NULL; 2458 V_pfsync_update_state_ptr = NULL; 2459 V_pfsync_delete_state_ptr = NULL; 2460 V_pfsync_clear_states_ptr = NULL; 2461 V_pfsync_defer_ptr = NULL; 2462 PF_RULES_WUNLOCK(); 2463 } 2464 2465 static void 2466 vnet_pfsync_init(const void *unused __unused) 2467 { 2468 int error; 2469 2470 V_pfsync_cloner = if_clone_simple(pfsyncname, 2471 pfsync_clone_create, pfsync_clone_destroy, 1); 2472 error = swi_add(&V_pfsync_swi_ie, pfsyncname, pfsyncintr, V_pfsyncif, 2473 SWI_NET, INTR_MPSAFE, &V_pfsync_swi_cookie); 2474 if (error) { 2475 if_clone_detach(V_pfsync_cloner); 2476 log(LOG_INFO, "swi_add() failed in %s\n", __func__); 2477 } 2478 2479 pfsync_pointers_init(); 2480 } 2481 VNET_SYSINIT(vnet_pfsync_init, SI_SUB_PROTO_FIREWALL, SI_ORDER_ANY, 2482 vnet_pfsync_init, NULL); 2483 2484 static void 2485 vnet_pfsync_uninit(const void *unused __unused) 2486 { 2487 int ret __diagused; 2488 2489 pfsync_pointers_uninit(); 2490 2491 if_clone_detach(V_pfsync_cloner); 2492 ret = swi_remove(V_pfsync_swi_cookie); 2493 MPASS(ret == 0); 2494 ret = intr_event_destroy(V_pfsync_swi_ie); 2495 MPASS(ret == 0); 2496 } 2497 2498 VNET_SYSUNINIT(vnet_pfsync_uninit, SI_SUB_PROTO_FIREWALL, SI_ORDER_FOURTH, 2499 vnet_pfsync_uninit, NULL); 2500 2501 static int 2502 pfsync_init() 2503 { 2504 #ifdef INET 2505 int error; 2506 2507 pfsync_detach_ifnet_ptr = pfsync_detach_ifnet; 2508 2509 error = pf_proto_register(PF_INET, &in_pfsync_protosw); 2510 if (error) 2511 return (error); 2512 error = ipproto_register(IPPROTO_PFSYNC); 2513 if (error) { 2514 pf_proto_unregister(PF_INET, IPPROTO_PFSYNC, SOCK_RAW); 2515 return (error); 2516 } 2517 #endif 2518 2519 return (0); 2520 } 2521 2522 static void 2523 pfsync_uninit() 2524 { 2525 pfsync_detach_ifnet_ptr = NULL; 2526 2527 #ifdef INET 2528 ipproto_unregister(IPPROTO_PFSYNC); 2529 pf_proto_unregister(PF_INET, IPPROTO_PFSYNC, SOCK_RAW); 2530 #endif 2531 } 2532 2533 static int 2534 pfsync_modevent(module_t mod, int type, void *data) 2535 { 2536 int error = 0; 2537 2538 switch (type) { 2539 case MOD_LOAD: 2540 error = pfsync_init(); 2541 break; 2542 case MOD_UNLOAD: 2543 pfsync_uninit(); 2544 break; 2545 default: 2546 error = EINVAL; 2547 break; 2548 } 2549 2550 return (error); 2551 } 2552 2553 static moduledata_t pfsync_mod = { 2554 pfsyncname, 2555 pfsync_modevent, 2556 0 2557 }; 2558 2559 #define PFSYNC_MODVER 1 2560 2561 /* Stay on FIREWALL as we depend on pf being initialized and on inetdomain. */ 2562 DECLARE_MODULE(pfsync, pfsync_mod, SI_SUB_PROTO_FIREWALL, SI_ORDER_ANY); 2563 MODULE_VERSION(pfsync, PFSYNC_MODVER); 2564 MODULE_DEPEND(pfsync, pf, PF_MODVER, PF_MODVER, PF_MODVER); 2565