1 /* $OpenBSD: if_pfsync.c,v 1.288 2021/03/10 10:21:48 jsg Exp $ */ 2 3 /* 4 * Copyright (c) 2002 Michael Shalayeff 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 19 * IN NO EVENT SHALL THE AUTHOR OR HIS RELATIVES BE LIABLE FOR ANY DIRECT, 20 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 21 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 22 * SERVICES; LOSS OF MIND, USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 24 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 25 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF 26 * THE POSSIBILITY OF SUCH DAMAGE. 27 */ 28 29 /* 30 * Copyright (c) 2009 David Gwynne <dlg@openbsd.org> 31 * 32 * Permission to use, copy, modify, and distribute this software for any 33 * purpose with or without fee is hereby granted, provided that the above 34 * copyright notice and this permission notice appear in all copies. 35 * 36 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 37 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 38 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 39 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 40 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 41 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 42 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 43 */ 44 45 #include <sys/param.h> 46 #include <sys/systm.h> 47 #include <sys/time.h> 48 #include <sys/malloc.h> 49 #include <sys/mbuf.h> 50 #include <sys/socket.h> 51 #include <sys/ioctl.h> 52 #include <sys/timeout.h> 53 #include <sys/kernel.h> 54 #include <sys/sysctl.h> 55 #include <sys/pool.h> 56 #include <sys/syslog.h> 57 58 #include <net/if.h> 59 #include <net/if_types.h> 60 #include <net/bpf.h> 61 #include <net/netisr.h> 62 63 #include <netinet/in.h> 64 #include <netinet/if_ether.h> 65 #include <netinet/ip.h> 66 #include <netinet/in_var.h> 67 #include <netinet/ip_var.h> 68 #include <netinet/ip_ipsp.h> 69 #include <netinet/ip_icmp.h> 70 #include <netinet/icmp6.h> 71 #include <netinet/tcp.h> 72 #include <netinet/tcp_seq.h> 73 #include <netinet/tcp_fsm.h> 74 #include <netinet/udp.h> 75 76 #ifdef INET6 77 #include <netinet6/in6_var.h> 78 #include <netinet/ip6.h> 79 #include <netinet6/ip6_var.h> 80 #include <netinet6/nd6.h> 81 #endif /* INET6 */ 82 83 #include "carp.h" 84 #if NCARP > 0 85 #include <netinet/ip_carp.h> 86 #endif 87 88 #define PF_DEBUGNAME "pfsync: " 89 #include <net/pfvar.h> 90 #include <net/pfvar_priv.h> 91 #include <net/if_pfsync.h> 92 93 #include "bpfilter.h" 94 #include "pfsync.h" 95 96 #define PFSYNC_MINPKT ( \ 97 sizeof(struct ip) + \ 98 sizeof(struct pfsync_header)) 99 100 int pfsync_upd_tcp(struct pf_state *, struct pfsync_state_peer *, 101 struct pfsync_state_peer *); 102 103 int pfsync_in_clr(caddr_t, int, int, int); 104 int pfsync_in_iack(caddr_t, int, int, int); 105 int pfsync_in_upd_c(caddr_t, int, int, int); 106 int pfsync_in_ureq(caddr_t, int, int, int); 107 int pfsync_in_del(caddr_t, int, int, int); 108 int pfsync_in_del_c(caddr_t, int, int, int); 109 int pfsync_in_bus(caddr_t, int, int, int); 110 int pfsync_in_tdb(caddr_t, int, int, int); 111 int pfsync_in_ins(caddr_t, int, int, int); 112 int pfsync_in_upd(caddr_t, int, int, int); 113 int pfsync_in_eof(caddr_t, int, int, int); 114 115 int pfsync_in_error(caddr_t, int, int, int); 116 117 void pfsync_update_state_locked(struct pf_state *); 118 119 struct { 120 int (*in)(caddr_t, int, int, int); 121 size_t len; 122 } pfsync_acts[] = { 123 /* PFSYNC_ACT_CLR */ 124 { pfsync_in_clr, sizeof(struct pfsync_clr) }, 125 /* PFSYNC_ACT_OINS */ 126 { pfsync_in_error, 0 }, 127 /* PFSYNC_ACT_INS_ACK */ 128 { pfsync_in_iack, sizeof(struct pfsync_ins_ack) }, 129 /* PFSYNC_ACT_OUPD */ 130 { pfsync_in_error, 0 }, 131 /* PFSYNC_ACT_UPD_C */ 132 { pfsync_in_upd_c, sizeof(struct pfsync_upd_c) }, 133 /* PFSYNC_ACT_UPD_REQ */ 134 { pfsync_in_ureq, sizeof(struct pfsync_upd_req) }, 135 /* PFSYNC_ACT_DEL */ 136 { pfsync_in_del, sizeof(struct pfsync_state) }, 137 /* PFSYNC_ACT_DEL_C */ 138 { pfsync_in_del_c, sizeof(struct pfsync_del_c) }, 139 /* PFSYNC_ACT_INS_F */ 140 { pfsync_in_error, 0 }, 141 /* PFSYNC_ACT_DEL_F */ 142 { pfsync_in_error, 0 }, 143 /* PFSYNC_ACT_BUS */ 144 { pfsync_in_bus, sizeof(struct pfsync_bus) }, 145 /* PFSYNC_ACT_OTDB */ 146 { pfsync_in_error, 0 }, 147 /* PFSYNC_ACT_EOF */ 148 { pfsync_in_error, 0 }, 149 /* PFSYNC_ACT_INS */ 150 { pfsync_in_ins, sizeof(struct pfsync_state) }, 151 /* PFSYNC_ACT_UPD */ 152 { pfsync_in_upd, sizeof(struct pfsync_state) }, 153 /* PFSYNC_ACT_TDB */ 154 { pfsync_in_tdb, sizeof(struct pfsync_tdb) }, 155 }; 156 157 struct pfsync_q { 158 void (*write)(struct pf_state *, void *); 159 size_t len; 160 u_int8_t action; 161 }; 162 163 /* we have one of these for every PFSYNC_S_ */ 164 void pfsync_out_state(struct pf_state *, void *); 165 void pfsync_out_iack(struct pf_state *, void *); 166 void pfsync_out_upd_c(struct pf_state *, void *); 167 void pfsync_out_del(struct pf_state *, void *); 168 169 struct pfsync_q pfsync_qs[] = { 170 { pfsync_out_iack, sizeof(struct pfsync_ins_ack), PFSYNC_ACT_INS_ACK }, 171 { pfsync_out_upd_c, sizeof(struct pfsync_upd_c), PFSYNC_ACT_UPD_C }, 172 { pfsync_out_del, sizeof(struct pfsync_del_c), PFSYNC_ACT_DEL_C }, 173 { pfsync_out_state, sizeof(struct pfsync_state), PFSYNC_ACT_INS }, 174 { pfsync_out_state, sizeof(struct pfsync_state), PFSYNC_ACT_UPD } 175 }; 176 177 void pfsync_q_ins(struct pf_state *, int); 178 void pfsync_q_del(struct pf_state *); 179 180 struct pfsync_upd_req_item { 181 TAILQ_ENTRY(pfsync_upd_req_item) ur_entry; 182 struct pfsync_upd_req ur_msg; 183 }; 184 TAILQ_HEAD(pfsync_upd_reqs, pfsync_upd_req_item); 185 186 struct pfsync_deferral { 187 TAILQ_ENTRY(pfsync_deferral) pd_entry; 188 struct pf_state *pd_st; 189 struct mbuf *pd_m; 190 struct timeout pd_tmo; 191 }; 192 TAILQ_HEAD(pfsync_deferrals, pfsync_deferral); 193 194 #define PFSYNC_PLSIZE MAX(sizeof(struct pfsync_upd_req_item), \ 195 sizeof(struct pfsync_deferral)) 196 197 void pfsync_out_tdb(struct tdb *, void *); 198 199 struct pfsync_softc { 200 struct ifnet sc_if; 201 unsigned int sc_sync_ifidx; 202 203 struct pool sc_pool; 204 205 struct ip_moptions sc_imo; 206 207 struct in_addr sc_sync_peer; 208 u_int8_t sc_maxupdates; 209 210 struct ip sc_template; 211 212 struct pf_state_queue sc_qs[PFSYNC_S_COUNT]; 213 struct mutex sc_mtx[PFSYNC_S_COUNT]; 214 size_t sc_len; 215 216 struct pfsync_upd_reqs sc_upd_req_list; 217 struct mutex sc_upd_req_mtx; 218 219 int sc_initial_bulk; 220 int sc_link_demoted; 221 222 int sc_defer; 223 struct pfsync_deferrals sc_deferrals; 224 u_int sc_deferred; 225 struct mutex sc_deferrals_mtx; 226 227 void *sc_plus; 228 size_t sc_pluslen; 229 230 u_int32_t sc_ureq_sent; 231 int sc_bulk_tries; 232 struct timeout sc_bulkfail_tmo; 233 234 u_int32_t sc_ureq_received; 235 struct pf_state *sc_bulk_next; 236 struct pf_state *sc_bulk_last; 237 struct timeout sc_bulk_tmo; 238 239 TAILQ_HEAD(, tdb) sc_tdb_q; 240 struct mutex sc_tdb_mtx; 241 242 struct task sc_ltask; 243 struct task sc_dtask; 244 245 struct timeout sc_tmo; 246 }; 247 248 struct pfsync_snapshot { 249 struct pfsync_softc *sn_sc; 250 struct pf_state_queue sn_qs[PFSYNC_S_COUNT]; 251 struct pfsync_upd_reqs sn_upd_req_list; 252 TAILQ_HEAD(, tdb) sn_tdb_q; 253 size_t sn_len; 254 void *sn_plus; 255 size_t sn_pluslen; 256 }; 257 258 struct pfsync_softc *pfsyncif = NULL; 259 struct cpumem *pfsynccounters; 260 261 void pfsyncattach(int); 262 int pfsync_clone_create(struct if_clone *, int); 263 int pfsync_clone_destroy(struct ifnet *); 264 int pfsync_alloc_scrub_memory(struct pfsync_state_peer *, 265 struct pf_state_peer *); 266 void pfsync_update_net_tdb(struct pfsync_tdb *); 267 int pfsyncoutput(struct ifnet *, struct mbuf *, struct sockaddr *, 268 struct rtentry *); 269 int pfsyncioctl(struct ifnet *, u_long, caddr_t); 270 void pfsyncstart(struct ifqueue *); 271 void pfsync_syncdev_state(void *); 272 void pfsync_ifdetach(void *); 273 274 void pfsync_deferred(struct pf_state *, int); 275 void pfsync_undefer(struct pfsync_deferral *, int); 276 void pfsync_defer_tmo(void *); 277 278 void pfsync_cancel_full_update(struct pfsync_softc *); 279 void pfsync_request_full_update(struct pfsync_softc *); 280 void pfsync_request_update(u_int32_t, u_int64_t); 281 void pfsync_update_state_req(struct pf_state *); 282 283 void pfsync_drop(struct pfsync_softc *); 284 void pfsync_sendout(void); 285 void pfsync_send_plus(void *, size_t); 286 void pfsync_timeout(void *); 287 void pfsync_tdb_timeout(void *); 288 289 void pfsync_bulk_start(void); 290 void pfsync_bulk_status(u_int8_t); 291 void pfsync_bulk_update(void *); 292 void pfsync_bulk_fail(void *); 293 294 void pfsync_grab_snapshot(struct pfsync_snapshot *, struct pfsync_softc *); 295 void pfsync_drop_snapshot(struct pfsync_snapshot *); 296 297 void pfsync_send_dispatch(void *); 298 void pfsync_send_pkt(struct mbuf *); 299 300 static struct mbuf_queue pfsync_mq; 301 static struct task pfsync_task = 302 TASK_INITIALIZER(pfsync_send_dispatch, &pfsync_mq); 303 304 #define PFSYNC_MAX_BULKTRIES 12 305 int pfsync_sync_ok; 306 307 struct if_clone pfsync_cloner = 308 IF_CLONE_INITIALIZER("pfsync", pfsync_clone_create, pfsync_clone_destroy); 309 310 void 311 pfsyncattach(int npfsync) 312 { 313 if_clone_attach(&pfsync_cloner); 314 pfsynccounters = counters_alloc(pfsyncs_ncounters); 315 mq_init(&pfsync_mq, 4096, IPL_SOFTNET); 316 } 317 318 int 319 pfsync_clone_create(struct if_clone *ifc, int unit) 320 { 321 struct pfsync_softc *sc; 322 struct ifnet *ifp; 323 int q; 324 static const char *mtx_names[] = { 325 "iack_mtx", 326 "upd_c_mtx", 327 "del_mtx", 328 "ins_mtx", 329 "upd_mtx", 330 "" }; 331 332 if (unit != 0) 333 return (EINVAL); 334 335 pfsync_sync_ok = 1; 336 337 sc = malloc(sizeof(*pfsyncif), M_DEVBUF, M_WAITOK|M_ZERO); 338 for (q = 0; q < PFSYNC_S_COUNT; q++) { 339 TAILQ_INIT(&sc->sc_qs[q]); 340 mtx_init_flags(&sc->sc_mtx[q], IPL_SOFTNET, mtx_names[q], 0); 341 } 342 343 pool_init(&sc->sc_pool, PFSYNC_PLSIZE, 0, IPL_SOFTNET, 0, "pfsync", 344 NULL); 345 TAILQ_INIT(&sc->sc_upd_req_list); 346 mtx_init(&sc->sc_upd_req_mtx, IPL_SOFTNET); 347 TAILQ_INIT(&sc->sc_deferrals); 348 mtx_init(&sc->sc_deferrals_mtx, IPL_SOFTNET); 349 task_set(&sc->sc_ltask, pfsync_syncdev_state, sc); 350 task_set(&sc->sc_dtask, pfsync_ifdetach, sc); 351 sc->sc_deferred = 0; 352 353 TAILQ_INIT(&sc->sc_tdb_q); 354 mtx_init(&sc->sc_tdb_mtx, IPL_SOFTNET); 355 356 sc->sc_len = PFSYNC_MINPKT; 357 sc->sc_maxupdates = 128; 358 359 sc->sc_imo.imo_membership = mallocarray(IP_MIN_MEMBERSHIPS, 360 sizeof(struct in_multi *), M_IPMOPTS, M_WAITOK|M_ZERO); 361 sc->sc_imo.imo_max_memberships = IP_MIN_MEMBERSHIPS; 362 363 ifp = &sc->sc_if; 364 snprintf(ifp->if_xname, sizeof ifp->if_xname, "pfsync%d", unit); 365 ifp->if_softc = sc; 366 ifp->if_ioctl = pfsyncioctl; 367 ifp->if_output = pfsyncoutput; 368 ifp->if_qstart = pfsyncstart; 369 ifp->if_type = IFT_PFSYNC; 370 ifp->if_hdrlen = sizeof(struct pfsync_header); 371 ifp->if_mtu = ETHERMTU; 372 ifp->if_xflags = IFXF_CLONED | IFXF_MPSAFE; 373 timeout_set_proc(&sc->sc_tmo, pfsync_timeout, NULL); 374 timeout_set_proc(&sc->sc_bulk_tmo, pfsync_bulk_update, NULL); 375 timeout_set_proc(&sc->sc_bulkfail_tmo, pfsync_bulk_fail, NULL); 376 377 if_attach(ifp); 378 if_alloc_sadl(ifp); 379 380 #if NCARP > 0 381 if_addgroup(ifp, "carp"); 382 #endif 383 384 #if NBPFILTER > 0 385 bpfattach(&sc->sc_if.if_bpf, ifp, DLT_PFSYNC, PFSYNC_HDRLEN); 386 #endif 387 388 pfsyncif = sc; 389 390 return (0); 391 } 392 393 int 394 pfsync_clone_destroy(struct ifnet *ifp) 395 { 396 struct pfsync_softc *sc = ifp->if_softc; 397 struct ifnet *ifp0; 398 struct pfsync_deferral *pd; 399 struct pfsync_deferrals deferrals; 400 401 NET_LOCK(); 402 403 #if NCARP > 0 404 if (!pfsync_sync_ok) 405 carp_group_demote_adj(&sc->sc_if, -1, "pfsync destroy"); 406 if (sc->sc_link_demoted) 407 carp_group_demote_adj(&sc->sc_if, -1, "pfsync destroy"); 408 #endif 409 if ((ifp0 = if_get(sc->sc_sync_ifidx)) != NULL) { 410 if_linkstatehook_del(ifp0, &sc->sc_ltask); 411 if_detachhook_del(ifp0, &sc->sc_dtask); 412 } 413 if_put(ifp0); 414 415 /* XXXSMP breaks atomicity */ 416 NET_UNLOCK(); 417 if_detach(ifp); 418 NET_LOCK(); 419 420 pfsync_drop(sc); 421 422 if (sc->sc_deferred > 0) { 423 TAILQ_INIT(&deferrals); 424 mtx_enter(&sc->sc_deferrals_mtx); 425 TAILQ_CONCAT(&deferrals, &sc->sc_deferrals, pd_entry); 426 sc->sc_deferred = 0; 427 mtx_leave(&sc->sc_deferrals_mtx); 428 429 while (!TAILQ_EMPTY(&deferrals)) { 430 pd = TAILQ_FIRST(&deferrals); 431 TAILQ_REMOVE(&deferrals, pd, pd_entry); 432 pfsync_undefer(pd, 0); 433 } 434 } 435 436 pfsyncif = NULL; 437 timeout_del(&sc->sc_bulkfail_tmo); 438 timeout_del(&sc->sc_bulk_tmo); 439 timeout_del(&sc->sc_tmo); 440 441 NET_UNLOCK(); 442 443 pool_destroy(&sc->sc_pool); 444 free(sc->sc_imo.imo_membership, M_IPMOPTS, 445 sc->sc_imo.imo_max_memberships * sizeof(struct in_multi *)); 446 free(sc, M_DEVBUF, sizeof(*sc)); 447 448 return (0); 449 } 450 451 /* 452 * Start output on the pfsync interface. 453 */ 454 void 455 pfsyncstart(struct ifqueue *ifq) 456 { 457 ifq_purge(ifq); 458 } 459 460 void 461 pfsync_syncdev_state(void *arg) 462 { 463 struct pfsync_softc *sc = arg; 464 struct ifnet *ifp; 465 466 if ((sc->sc_if.if_flags & IFF_UP) == 0) 467 return; 468 if ((ifp = if_get(sc->sc_sync_ifidx)) == NULL) 469 return; 470 471 if (ifp->if_link_state == LINK_STATE_DOWN) { 472 sc->sc_if.if_flags &= ~IFF_RUNNING; 473 if (!sc->sc_link_demoted) { 474 #if NCARP > 0 475 carp_group_demote_adj(&sc->sc_if, 1, 476 "pfsync link state down"); 477 #endif 478 sc->sc_link_demoted = 1; 479 } 480 481 /* drop everything */ 482 timeout_del(&sc->sc_tmo); 483 pfsync_drop(sc); 484 485 pfsync_cancel_full_update(sc); 486 } else if (sc->sc_link_demoted) { 487 sc->sc_if.if_flags |= IFF_RUNNING; 488 489 pfsync_request_full_update(sc); 490 } 491 492 if_put(ifp); 493 } 494 495 void 496 pfsync_ifdetach(void *arg) 497 { 498 struct pfsync_softc *sc = arg; 499 struct ifnet *ifp; 500 501 if ((ifp = if_get(sc->sc_sync_ifidx)) != NULL) { 502 if_linkstatehook_del(ifp, &sc->sc_ltask); 503 if_detachhook_del(ifp, &sc->sc_dtask); 504 } 505 if_put(ifp); 506 507 sc->sc_sync_ifidx = 0; 508 } 509 510 int 511 pfsync_alloc_scrub_memory(struct pfsync_state_peer *s, 512 struct pf_state_peer *d) 513 { 514 if (s->scrub.scrub_flag && d->scrub == NULL) { 515 d->scrub = pool_get(&pf_state_scrub_pl, PR_NOWAIT | PR_ZERO); 516 if (d->scrub == NULL) 517 return (ENOMEM); 518 } 519 520 return (0); 521 } 522 523 void 524 pfsync_state_export(struct pfsync_state *sp, struct pf_state *st) 525 { 526 pf_state_export(sp, st); 527 } 528 529 int 530 pfsync_state_import(struct pfsync_state *sp, int flags) 531 { 532 struct pf_state *st = NULL; 533 struct pf_state_key *skw = NULL, *sks = NULL; 534 struct pf_rule *r = NULL; 535 struct pfi_kif *kif; 536 int pool_flags; 537 int error = ENOMEM; 538 int n = 0; 539 540 if (sp->creatorid == 0) { 541 DPFPRINTF(LOG_NOTICE, "pfsync_state_import: " 542 "invalid creator id: %08x", ntohl(sp->creatorid)); 543 return (EINVAL); 544 } 545 546 if ((kif = pfi_kif_get(sp->ifname)) == NULL) { 547 DPFPRINTF(LOG_NOTICE, "pfsync_state_import: " 548 "unknown interface: %s", sp->ifname); 549 if (flags & PFSYNC_SI_IOCTL) 550 return (EINVAL); 551 return (0); /* skip this state */ 552 } 553 554 if (sp->af == 0) 555 return (0); /* skip this state */ 556 557 /* 558 * If the ruleset checksums match or the state is coming from the ioctl, 559 * it's safe to associate the state with the rule of that number. 560 */ 561 if (sp->rule != htonl(-1) && sp->anchor == htonl(-1) && 562 (flags & (PFSYNC_SI_IOCTL | PFSYNC_SI_CKSUM)) && ntohl(sp->rule) < 563 pf_main_ruleset.rules.active.rcount) { 564 TAILQ_FOREACH(r, pf_main_ruleset.rules.active.ptr, entries) 565 if (ntohl(sp->rule) == n++) 566 break; 567 } else 568 r = &pf_default_rule; 569 570 if ((r->max_states && r->states_cur >= r->max_states)) 571 goto cleanup; 572 573 if (flags & PFSYNC_SI_IOCTL) 574 pool_flags = PR_WAITOK | PR_LIMITFAIL | PR_ZERO; 575 else 576 pool_flags = PR_NOWAIT | PR_LIMITFAIL | PR_ZERO; 577 578 if ((st = pool_get(&pf_state_pl, pool_flags)) == NULL) 579 goto cleanup; 580 581 if ((skw = pf_alloc_state_key(pool_flags)) == NULL) 582 goto cleanup; 583 584 if ((sp->key[PF_SK_WIRE].af && 585 (sp->key[PF_SK_WIRE].af != sp->key[PF_SK_STACK].af)) || 586 PF_ANEQ(&sp->key[PF_SK_WIRE].addr[0], 587 &sp->key[PF_SK_STACK].addr[0], sp->af) || 588 PF_ANEQ(&sp->key[PF_SK_WIRE].addr[1], 589 &sp->key[PF_SK_STACK].addr[1], sp->af) || 590 sp->key[PF_SK_WIRE].port[0] != sp->key[PF_SK_STACK].port[0] || 591 sp->key[PF_SK_WIRE].port[1] != sp->key[PF_SK_STACK].port[1] || 592 sp->key[PF_SK_WIRE].rdomain != sp->key[PF_SK_STACK].rdomain) { 593 if ((sks = pf_alloc_state_key(pool_flags)) == NULL) 594 goto cleanup; 595 } else 596 sks = skw; 597 598 /* allocate memory for scrub info */ 599 if (pfsync_alloc_scrub_memory(&sp->src, &st->src) || 600 pfsync_alloc_scrub_memory(&sp->dst, &st->dst)) 601 goto cleanup; 602 603 /* copy to state key(s) */ 604 skw->addr[0] = sp->key[PF_SK_WIRE].addr[0]; 605 skw->addr[1] = sp->key[PF_SK_WIRE].addr[1]; 606 skw->port[0] = sp->key[PF_SK_WIRE].port[0]; 607 skw->port[1] = sp->key[PF_SK_WIRE].port[1]; 608 skw->rdomain = ntohs(sp->key[PF_SK_WIRE].rdomain); 609 PF_REF_INIT(skw->refcnt); 610 skw->proto = sp->proto; 611 if (!(skw->af = sp->key[PF_SK_WIRE].af)) 612 skw->af = sp->af; 613 if (sks != skw) { 614 sks->addr[0] = sp->key[PF_SK_STACK].addr[0]; 615 sks->addr[1] = sp->key[PF_SK_STACK].addr[1]; 616 sks->port[0] = sp->key[PF_SK_STACK].port[0]; 617 sks->port[1] = sp->key[PF_SK_STACK].port[1]; 618 sks->rdomain = ntohs(sp->key[PF_SK_STACK].rdomain); 619 PF_REF_INIT(sks->refcnt); 620 if (!(sks->af = sp->key[PF_SK_STACK].af)) 621 sks->af = sp->af; 622 if (sks->af != skw->af) { 623 switch (sp->proto) { 624 case IPPROTO_ICMP: 625 sks->proto = IPPROTO_ICMPV6; 626 break; 627 case IPPROTO_ICMPV6: 628 sks->proto = IPPROTO_ICMP; 629 break; 630 default: 631 sks->proto = sp->proto; 632 } 633 } else 634 sks->proto = sp->proto; 635 636 if (((sks->af != AF_INET) && (sks->af != AF_INET6)) || 637 ((skw->af != AF_INET) && (skw->af != AF_INET6))) { 638 error = EINVAL; 639 goto cleanup; 640 } 641 642 } else if ((sks->af != AF_INET) && (sks->af != AF_INET6)) { 643 error = EINVAL; 644 goto cleanup; 645 } 646 st->rtableid[PF_SK_WIRE] = ntohl(sp->rtableid[PF_SK_WIRE]); 647 st->rtableid[PF_SK_STACK] = ntohl(sp->rtableid[PF_SK_STACK]); 648 649 /* copy to state */ 650 st->rt_addr = sp->rt_addr; 651 st->rt = sp->rt; 652 st->creation = getuptime() - ntohl(sp->creation); 653 st->expire = getuptime(); 654 if (ntohl(sp->expire)) { 655 u_int32_t timeout; 656 657 timeout = r->timeout[sp->timeout]; 658 if (!timeout) 659 timeout = pf_default_rule.timeout[sp->timeout]; 660 661 /* sp->expire may have been adaptively scaled by export. */ 662 st->expire -= timeout - ntohl(sp->expire); 663 } 664 665 st->direction = sp->direction; 666 st->log = sp->log; 667 st->timeout = sp->timeout; 668 st->state_flags = ntohs(sp->state_flags); 669 st->max_mss = ntohs(sp->max_mss); 670 st->min_ttl = sp->min_ttl; 671 st->set_tos = sp->set_tos; 672 st->set_prio[0] = sp->set_prio[0]; 673 st->set_prio[1] = sp->set_prio[1]; 674 675 st->id = sp->id; 676 st->creatorid = sp->creatorid; 677 pf_state_peer_ntoh(&sp->src, &st->src); 678 pf_state_peer_ntoh(&sp->dst, &st->dst); 679 680 st->rule.ptr = r; 681 st->anchor.ptr = NULL; 682 683 st->pfsync_time = getuptime(); 684 st->sync_state = PFSYNC_S_NONE; 685 686 refcnt_init(&st->refcnt); 687 688 /* XXX when we have anchors, use STATE_INC_COUNTERS */ 689 r->states_cur++; 690 r->states_tot++; 691 692 if (!ISSET(flags, PFSYNC_SI_IOCTL)) 693 SET(st->state_flags, PFSTATE_NOSYNC); 694 695 /* 696 * We just set PFSTATE_NOSYNC bit, which prevents 697 * pfsync_insert_state() to insert state to pfsync. 698 */ 699 if (pf_state_insert(kif, &skw, &sks, st) != 0) { 700 /* XXX when we have anchors, use STATE_DEC_COUNTERS */ 701 r->states_cur--; 702 error = EEXIST; 703 goto cleanup_state; 704 } 705 706 if (!ISSET(flags, PFSYNC_SI_IOCTL)) { 707 CLR(st->state_flags, PFSTATE_NOSYNC); 708 if (ISSET(st->state_flags, PFSTATE_ACK)) { 709 pfsync_q_ins(st, PFSYNC_S_IACK); 710 schednetisr(NETISR_PFSYNC); 711 } 712 } 713 CLR(st->state_flags, PFSTATE_ACK); 714 715 return (0); 716 717 cleanup: 718 if (skw == sks) 719 sks = NULL; 720 if (skw != NULL) 721 pool_put(&pf_state_key_pl, skw); 722 if (sks != NULL) 723 pool_put(&pf_state_key_pl, sks); 724 725 cleanup_state: /* pf_state_insert frees the state keys */ 726 if (st) { 727 if (st->dst.scrub) 728 pool_put(&pf_state_scrub_pl, st->dst.scrub); 729 if (st->src.scrub) 730 pool_put(&pf_state_scrub_pl, st->src.scrub); 731 pool_put(&pf_state_pl, st); 732 } 733 return (error); 734 } 735 736 int 737 pfsync_input(struct mbuf **mp, int *offp, int proto, int af) 738 { 739 struct mbuf *n, *m = *mp; 740 struct pfsync_softc *sc = pfsyncif; 741 struct ip *ip = mtod(m, struct ip *); 742 struct pfsync_header *ph; 743 struct pfsync_subheader subh; 744 int offset, noff, len, count, mlen, flags = 0; 745 int e; 746 747 NET_ASSERT_LOCKED(); 748 749 pfsyncstat_inc(pfsyncs_ipackets); 750 751 /* verify that we have a sync interface configured */ 752 if (sc == NULL || !ISSET(sc->sc_if.if_flags, IFF_RUNNING) || 753 sc->sc_sync_ifidx == 0 || !pf_status.running) 754 goto done; 755 756 /* verify that the packet came in on the right interface */ 757 if (sc->sc_sync_ifidx != m->m_pkthdr.ph_ifidx) { 758 pfsyncstat_inc(pfsyncs_badif); 759 goto done; 760 } 761 762 sc->sc_if.if_ipackets++; 763 sc->sc_if.if_ibytes += m->m_pkthdr.len; 764 765 /* verify that the IP TTL is 255. */ 766 if (ip->ip_ttl != PFSYNC_DFLTTL) { 767 pfsyncstat_inc(pfsyncs_badttl); 768 goto done; 769 } 770 771 offset = ip->ip_hl << 2; 772 n = m_pulldown(m, offset, sizeof(*ph), &noff); 773 if (n == NULL) { 774 pfsyncstat_inc(pfsyncs_hdrops); 775 return IPPROTO_DONE; 776 } 777 ph = (struct pfsync_header *)(n->m_data + noff); 778 779 /* verify the version */ 780 if (ph->version != PFSYNC_VERSION) { 781 pfsyncstat_inc(pfsyncs_badver); 782 goto done; 783 } 784 len = ntohs(ph->len) + offset; 785 if (m->m_pkthdr.len < len) { 786 pfsyncstat_inc(pfsyncs_badlen); 787 goto done; 788 } 789 790 if (!bcmp(&ph->pfcksum, &pf_status.pf_chksum, PF_MD5_DIGEST_LENGTH)) 791 flags = PFSYNC_SI_CKSUM; 792 793 offset += sizeof(*ph); 794 while (offset <= len - sizeof(subh)) { 795 m_copydata(m, offset, sizeof(subh), &subh); 796 offset += sizeof(subh); 797 798 mlen = subh.len << 2; 799 count = ntohs(subh.count); 800 801 if (subh.action >= PFSYNC_ACT_MAX || 802 subh.action >= nitems(pfsync_acts) || 803 mlen < pfsync_acts[subh.action].len) { 804 /* 805 * subheaders are always followed by at least one 806 * message, so if the peer is new 807 * enough to tell us how big its messages are then we 808 * know enough to skip them. 809 */ 810 if (count > 0 && mlen > 0) { 811 offset += count * mlen; 812 continue; 813 } 814 pfsyncstat_inc(pfsyncs_badact); 815 goto done; 816 } 817 818 n = m_pulldown(m, offset, mlen * count, &noff); 819 if (n == NULL) { 820 pfsyncstat_inc(pfsyncs_badlen); 821 return IPPROTO_DONE; 822 } 823 824 e = pfsync_acts[subh.action].in(n->m_data + noff, mlen, count, 825 flags); 826 if (e != 0) 827 goto done; 828 829 offset += mlen * count; 830 } 831 832 done: 833 m_freem(m); 834 return IPPROTO_DONE; 835 } 836 837 int 838 pfsync_in_clr(caddr_t buf, int len, int count, int flags) 839 { 840 struct pfsync_clr *clr; 841 struct pf_state *st, *nexts; 842 struct pfi_kif *kif; 843 u_int32_t creatorid; 844 int i; 845 846 PF_LOCK(); 847 for (i = 0; i < count; i++) { 848 clr = (struct pfsync_clr *)buf + len * i; 849 kif = NULL; 850 creatorid = clr->creatorid; 851 if (strlen(clr->ifname) && 852 (kif = pfi_kif_find(clr->ifname)) == NULL) 853 continue; 854 855 PF_STATE_ENTER_WRITE(); 856 for (st = RB_MIN(pf_state_tree_id, &tree_id); st; st = nexts) { 857 nexts = RB_NEXT(pf_state_tree_id, &tree_id, st); 858 if (st->creatorid == creatorid && 859 ((kif && st->kif == kif) || !kif)) { 860 SET(st->state_flags, PFSTATE_NOSYNC); 861 pf_remove_state(st); 862 } 863 } 864 PF_STATE_EXIT_WRITE(); 865 } 866 PF_UNLOCK(); 867 868 return (0); 869 } 870 871 int 872 pfsync_in_ins(caddr_t buf, int len, int count, int flags) 873 { 874 struct pfsync_state *sp; 875 sa_family_t af1, af2; 876 int i; 877 878 PF_LOCK(); 879 for (i = 0; i < count; i++) { 880 sp = (struct pfsync_state *)(buf + len * i); 881 af1 = sp->key[0].af; 882 af2 = sp->key[1].af; 883 884 /* check for invalid values */ 885 if (sp->timeout >= PFTM_MAX || 886 sp->src.state > PF_TCPS_PROXY_DST || 887 sp->dst.state > PF_TCPS_PROXY_DST || 888 sp->direction > PF_OUT || 889 (((af1 || af2) && 890 ((af1 != AF_INET && af1 != AF_INET6) || 891 (af2 != AF_INET && af2 != AF_INET6))) || 892 (sp->af != AF_INET && sp->af != AF_INET6))) { 893 DPFPRINTF(LOG_NOTICE, 894 "pfsync_input: PFSYNC5_ACT_INS: invalid value"); 895 pfsyncstat_inc(pfsyncs_badval); 896 continue; 897 } 898 899 if (pfsync_state_import(sp, flags) == ENOMEM) { 900 /* drop out, but process the rest of the actions */ 901 break; 902 } 903 } 904 PF_UNLOCK(); 905 906 return (0); 907 } 908 909 int 910 pfsync_in_iack(caddr_t buf, int len, int count, int flags) 911 { 912 struct pfsync_ins_ack *ia; 913 struct pf_state_cmp id_key; 914 struct pf_state *st; 915 int i; 916 917 for (i = 0; i < count; i++) { 918 ia = (struct pfsync_ins_ack *)(buf + len * i); 919 920 id_key.id = ia->id; 921 id_key.creatorid = ia->creatorid; 922 923 PF_STATE_ENTER_READ(); 924 st = pf_find_state_byid(&id_key); 925 pf_state_ref(st); 926 PF_STATE_EXIT_READ(); 927 if (st == NULL) 928 continue; 929 930 if (ISSET(st->state_flags, PFSTATE_ACK)) 931 pfsync_deferred(st, 0); 932 933 pf_state_unref(st); 934 } 935 936 return (0); 937 } 938 939 int 940 pfsync_upd_tcp(struct pf_state *st, struct pfsync_state_peer *src, 941 struct pfsync_state_peer *dst) 942 { 943 int sync = 0; 944 945 /* 946 * The state should never go backwards except 947 * for syn-proxy states. Neither should the 948 * sequence window slide backwards. 949 */ 950 if ((st->src.state > src->state && 951 (st->src.state < PF_TCPS_PROXY_SRC || 952 src->state >= PF_TCPS_PROXY_SRC)) || 953 954 (st->src.state == src->state && 955 SEQ_GT(st->src.seqlo, ntohl(src->seqlo)))) 956 sync++; 957 else 958 pf_state_peer_ntoh(src, &st->src); 959 960 if ((st->dst.state > dst->state) || 961 962 (st->dst.state >= TCPS_SYN_SENT && 963 SEQ_GT(st->dst.seqlo, ntohl(dst->seqlo)))) 964 sync++; 965 else 966 pf_state_peer_ntoh(dst, &st->dst); 967 968 return (sync); 969 } 970 971 int 972 pfsync_in_upd(caddr_t buf, int len, int count, int flags) 973 { 974 struct pfsync_state *sp; 975 struct pf_state_cmp id_key; 976 struct pf_state *st; 977 int sync, error; 978 int i; 979 980 for (i = 0; i < count; i++) { 981 sp = (struct pfsync_state *)(buf + len * i); 982 983 /* check for invalid values */ 984 if (sp->timeout >= PFTM_MAX || 985 sp->src.state > PF_TCPS_PROXY_DST || 986 sp->dst.state > PF_TCPS_PROXY_DST) { 987 DPFPRINTF(LOG_NOTICE, 988 "pfsync_input: PFSYNC_ACT_UPD: invalid value"); 989 pfsyncstat_inc(pfsyncs_badval); 990 continue; 991 } 992 993 id_key.id = sp->id; 994 id_key.creatorid = sp->creatorid; 995 996 PF_STATE_ENTER_READ(); 997 st = pf_find_state_byid(&id_key); 998 pf_state_ref(st); 999 PF_STATE_EXIT_READ(); 1000 if (st == NULL) { 1001 /* insert the update */ 1002 PF_LOCK(); 1003 error = pfsync_state_import(sp, flags); 1004 if (error) 1005 pfsyncstat_inc(pfsyncs_badstate); 1006 PF_UNLOCK(); 1007 continue; 1008 } 1009 1010 if (ISSET(st->state_flags, PFSTATE_ACK)) 1011 pfsync_deferred(st, 1); 1012 1013 if (st->key[PF_SK_WIRE]->proto == IPPROTO_TCP) 1014 sync = pfsync_upd_tcp(st, &sp->src, &sp->dst); 1015 else { 1016 sync = 0; 1017 1018 /* 1019 * Non-TCP protocol state machine always go 1020 * forwards 1021 */ 1022 if (st->src.state > sp->src.state) 1023 sync++; 1024 else 1025 pf_state_peer_ntoh(&sp->src, &st->src); 1026 1027 if (st->dst.state > sp->dst.state) 1028 sync++; 1029 else 1030 pf_state_peer_ntoh(&sp->dst, &st->dst); 1031 } 1032 1033 if (sync < 2) { 1034 pfsync_alloc_scrub_memory(&sp->dst, &st->dst); 1035 pf_state_peer_ntoh(&sp->dst, &st->dst); 1036 st->expire = getuptime(); 1037 st->timeout = sp->timeout; 1038 } 1039 st->pfsync_time = getuptime(); 1040 1041 if (sync) { 1042 pfsyncstat_inc(pfsyncs_stale); 1043 1044 pfsync_update_state(st); 1045 schednetisr(NETISR_PFSYNC); 1046 } 1047 1048 pf_state_unref(st); 1049 } 1050 1051 return (0); 1052 } 1053 1054 int 1055 pfsync_in_upd_c(caddr_t buf, int len, int count, int flags) 1056 { 1057 struct pfsync_upd_c *up; 1058 struct pf_state_cmp id_key; 1059 struct pf_state *st; 1060 1061 int sync; 1062 1063 int i; 1064 1065 for (i = 0; i < count; i++) { 1066 up = (struct pfsync_upd_c *)(buf + len * i); 1067 1068 /* check for invalid values */ 1069 if (up->timeout >= PFTM_MAX || 1070 up->src.state > PF_TCPS_PROXY_DST || 1071 up->dst.state > PF_TCPS_PROXY_DST) { 1072 DPFPRINTF(LOG_NOTICE, 1073 "pfsync_input: PFSYNC_ACT_UPD_C: invalid value"); 1074 pfsyncstat_inc(pfsyncs_badval); 1075 continue; 1076 } 1077 1078 id_key.id = up->id; 1079 id_key.creatorid = up->creatorid; 1080 1081 PF_STATE_ENTER_READ(); 1082 st = pf_find_state_byid(&id_key); 1083 pf_state_ref(st); 1084 PF_STATE_EXIT_READ(); 1085 if (st == NULL) { 1086 /* We don't have this state. Ask for it. */ 1087 pfsync_request_update(id_key.creatorid, id_key.id); 1088 continue; 1089 } 1090 1091 if (ISSET(st->state_flags, PFSTATE_ACK)) 1092 pfsync_deferred(st, 1); 1093 1094 if (st->key[PF_SK_WIRE]->proto == IPPROTO_TCP) 1095 sync = pfsync_upd_tcp(st, &up->src, &up->dst); 1096 else { 1097 sync = 0; 1098 /* 1099 * Non-TCP protocol state machine always go 1100 * forwards 1101 */ 1102 if (st->src.state > up->src.state) 1103 sync++; 1104 else 1105 pf_state_peer_ntoh(&up->src, &st->src); 1106 1107 if (st->dst.state > up->dst.state) 1108 sync++; 1109 else 1110 pf_state_peer_ntoh(&up->dst, &st->dst); 1111 } 1112 if (sync < 2) { 1113 pfsync_alloc_scrub_memory(&up->dst, &st->dst); 1114 pf_state_peer_ntoh(&up->dst, &st->dst); 1115 st->expire = getuptime(); 1116 st->timeout = up->timeout; 1117 } 1118 st->pfsync_time = getuptime(); 1119 1120 if (sync) { 1121 pfsyncstat_inc(pfsyncs_stale); 1122 1123 pfsync_update_state(st); 1124 schednetisr(NETISR_PFSYNC); 1125 } 1126 1127 pf_state_unref(st); 1128 } 1129 1130 return (0); 1131 } 1132 1133 int 1134 pfsync_in_ureq(caddr_t buf, int len, int count, int flags) 1135 { 1136 struct pfsync_upd_req *ur; 1137 int i; 1138 1139 struct pf_state_cmp id_key; 1140 struct pf_state *st; 1141 1142 for (i = 0; i < count; i++) { 1143 ur = (struct pfsync_upd_req *)(buf + len * i); 1144 1145 id_key.id = ur->id; 1146 id_key.creatorid = ur->creatorid; 1147 1148 if (id_key.id == 0 && id_key.creatorid == 0) 1149 pfsync_bulk_start(); 1150 else { 1151 PF_STATE_ENTER_READ(); 1152 st = pf_find_state_byid(&id_key); 1153 pf_state_ref(st); 1154 PF_STATE_EXIT_READ(); 1155 if (st == NULL) { 1156 pfsyncstat_inc(pfsyncs_badstate); 1157 continue; 1158 } 1159 if (ISSET(st->state_flags, PFSTATE_NOSYNC)) { 1160 pf_state_unref(st); 1161 continue; 1162 } 1163 1164 pfsync_update_state_req(st); 1165 pf_state_unref(st); 1166 } 1167 } 1168 1169 return (0); 1170 } 1171 1172 int 1173 pfsync_in_del(caddr_t buf, int len, int count, int flags) 1174 { 1175 struct pfsync_state *sp; 1176 struct pf_state_cmp id_key; 1177 struct pf_state *st; 1178 int i; 1179 1180 PF_STATE_ENTER_WRITE(); 1181 for (i = 0; i < count; i++) { 1182 sp = (struct pfsync_state *)(buf + len * i); 1183 1184 id_key.id = sp->id; 1185 id_key.creatorid = sp->creatorid; 1186 1187 st = pf_find_state_byid(&id_key); 1188 if (st == NULL) { 1189 pfsyncstat_inc(pfsyncs_badstate); 1190 continue; 1191 } 1192 SET(st->state_flags, PFSTATE_NOSYNC); 1193 pf_remove_state(st); 1194 } 1195 PF_STATE_EXIT_WRITE(); 1196 1197 return (0); 1198 } 1199 1200 int 1201 pfsync_in_del_c(caddr_t buf, int len, int count, int flags) 1202 { 1203 struct pfsync_del_c *sp; 1204 struct pf_state_cmp id_key; 1205 struct pf_state *st; 1206 int i; 1207 1208 PF_LOCK(); 1209 PF_STATE_ENTER_WRITE(); 1210 for (i = 0; i < count; i++) { 1211 sp = (struct pfsync_del_c *)(buf + len * i); 1212 1213 id_key.id = sp->id; 1214 id_key.creatorid = sp->creatorid; 1215 1216 st = pf_find_state_byid(&id_key); 1217 if (st == NULL) { 1218 pfsyncstat_inc(pfsyncs_badstate); 1219 continue; 1220 } 1221 1222 SET(st->state_flags, PFSTATE_NOSYNC); 1223 pf_remove_state(st); 1224 } 1225 PF_STATE_EXIT_WRITE(); 1226 PF_UNLOCK(); 1227 1228 return (0); 1229 } 1230 1231 int 1232 pfsync_in_bus(caddr_t buf, int len, int count, int flags) 1233 { 1234 struct pfsync_softc *sc = pfsyncif; 1235 struct pfsync_bus *bus; 1236 1237 /* If we're not waiting for a bulk update, who cares. */ 1238 if (sc->sc_ureq_sent == 0) 1239 return (0); 1240 1241 bus = (struct pfsync_bus *)buf; 1242 1243 switch (bus->status) { 1244 case PFSYNC_BUS_START: 1245 timeout_add(&sc->sc_bulkfail_tmo, 4 * hz + 1246 pf_pool_limits[PF_LIMIT_STATES].limit / 1247 ((sc->sc_if.if_mtu - PFSYNC_MINPKT) / 1248 sizeof(struct pfsync_state))); 1249 DPFPRINTF(LOG_INFO, "received bulk update start"); 1250 break; 1251 1252 case PFSYNC_BUS_END: 1253 if (getuptime() - ntohl(bus->endtime) >= 1254 sc->sc_ureq_sent) { 1255 /* that's it, we're happy */ 1256 sc->sc_ureq_sent = 0; 1257 sc->sc_bulk_tries = 0; 1258 timeout_del(&sc->sc_bulkfail_tmo); 1259 #if NCARP > 0 1260 if (!pfsync_sync_ok) 1261 carp_group_demote_adj(&sc->sc_if, -1, 1262 sc->sc_link_demoted ? 1263 "pfsync link state up" : 1264 "pfsync bulk done"); 1265 if (sc->sc_initial_bulk) { 1266 carp_group_demote_adj(&sc->sc_if, -32, 1267 "pfsync init"); 1268 sc->sc_initial_bulk = 0; 1269 } 1270 #endif 1271 pfsync_sync_ok = 1; 1272 sc->sc_link_demoted = 0; 1273 DPFPRINTF(LOG_INFO, "received valid bulk update end"); 1274 } else { 1275 DPFPRINTF(LOG_WARNING, "received invalid " 1276 "bulk update end: bad timestamp"); 1277 } 1278 break; 1279 } 1280 1281 return (0); 1282 } 1283 1284 int 1285 pfsync_in_tdb(caddr_t buf, int len, int count, int flags) 1286 { 1287 #if defined(IPSEC) 1288 struct pfsync_tdb *tp; 1289 int i; 1290 1291 for (i = 0; i < count; i++) { 1292 tp = (struct pfsync_tdb *)(buf + len * i); 1293 pfsync_update_net_tdb(tp); 1294 } 1295 #endif 1296 1297 return (0); 1298 } 1299 1300 #if defined(IPSEC) 1301 /* Update an in-kernel tdb. Silently fail if no tdb is found. */ 1302 void 1303 pfsync_update_net_tdb(struct pfsync_tdb *pt) 1304 { 1305 struct tdb *tdb; 1306 1307 NET_ASSERT_LOCKED(); 1308 1309 /* check for invalid values */ 1310 if (ntohl(pt->spi) <= SPI_RESERVED_MAX || 1311 (pt->dst.sa.sa_family != AF_INET && 1312 pt->dst.sa.sa_family != AF_INET6)) 1313 goto bad; 1314 1315 tdb = gettdb(ntohs(pt->rdomain), pt->spi, 1316 (union sockaddr_union *)&pt->dst, pt->sproto); 1317 if (tdb) { 1318 pt->rpl = betoh64(pt->rpl); 1319 pt->cur_bytes = betoh64(pt->cur_bytes); 1320 1321 /* Neither replay nor byte counter should ever decrease. */ 1322 if (pt->rpl < tdb->tdb_rpl || 1323 pt->cur_bytes < tdb->tdb_cur_bytes) { 1324 goto bad; 1325 } 1326 1327 tdb->tdb_rpl = pt->rpl; 1328 tdb->tdb_cur_bytes = pt->cur_bytes; 1329 } 1330 return; 1331 1332 bad: 1333 DPFPRINTF(LOG_WARNING, "pfsync_insert: PFSYNC_ACT_TDB_UPD: " 1334 "invalid value"); 1335 pfsyncstat_inc(pfsyncs_badstate); 1336 return; 1337 } 1338 #endif 1339 1340 1341 int 1342 pfsync_in_eof(caddr_t buf, int len, int count, int flags) 1343 { 1344 if (len > 0 || count > 0) 1345 pfsyncstat_inc(pfsyncs_badact); 1346 1347 /* we're done. let the caller return */ 1348 return (1); 1349 } 1350 1351 int 1352 pfsync_in_error(caddr_t buf, int len, int count, int flags) 1353 { 1354 pfsyncstat_inc(pfsyncs_badact); 1355 return (-1); 1356 } 1357 1358 int 1359 pfsyncoutput(struct ifnet *ifp, struct mbuf *m, struct sockaddr *dst, 1360 struct rtentry *rt) 1361 { 1362 m_freem(m); /* drop packet */ 1363 return (EAFNOSUPPORT); 1364 } 1365 1366 int 1367 pfsyncioctl(struct ifnet *ifp, u_long cmd, caddr_t data) 1368 { 1369 struct proc *p = curproc; 1370 struct pfsync_softc *sc = ifp->if_softc; 1371 struct ifreq *ifr = (struct ifreq *)data; 1372 struct ip_moptions *imo = &sc->sc_imo; 1373 struct pfsyncreq pfsyncr; 1374 struct ifnet *ifp0, *sifp; 1375 struct ip *ip; 1376 int error; 1377 1378 switch (cmd) { 1379 case SIOCSIFFLAGS: 1380 if ((ifp->if_flags & IFF_RUNNING) == 0 && 1381 (ifp->if_flags & IFF_UP)) { 1382 ifp->if_flags |= IFF_RUNNING; 1383 1384 #if NCARP > 0 1385 sc->sc_initial_bulk = 1; 1386 carp_group_demote_adj(&sc->sc_if, 32, "pfsync init"); 1387 #endif 1388 1389 pfsync_request_full_update(sc); 1390 } 1391 if ((ifp->if_flags & IFF_RUNNING) && 1392 (ifp->if_flags & IFF_UP) == 0) { 1393 ifp->if_flags &= ~IFF_RUNNING; 1394 1395 /* drop everything */ 1396 timeout_del(&sc->sc_tmo); 1397 pfsync_drop(sc); 1398 1399 pfsync_cancel_full_update(sc); 1400 } 1401 break; 1402 case SIOCSIFMTU: 1403 if ((ifp0 = if_get(sc->sc_sync_ifidx)) == NULL) 1404 return (EINVAL); 1405 error = 0; 1406 if (ifr->ifr_mtu <= PFSYNC_MINPKT || 1407 ifr->ifr_mtu > ifp0->if_mtu) { 1408 error = EINVAL; 1409 } 1410 if_put(ifp0); 1411 if (error) 1412 return error; 1413 if (ifr->ifr_mtu < ifp->if_mtu) 1414 pfsync_sendout(); 1415 ifp->if_mtu = ifr->ifr_mtu; 1416 break; 1417 case SIOCGETPFSYNC: 1418 bzero(&pfsyncr, sizeof(pfsyncr)); 1419 if ((ifp0 = if_get(sc->sc_sync_ifidx)) != NULL) { 1420 strlcpy(pfsyncr.pfsyncr_syncdev, 1421 ifp0->if_xname, IFNAMSIZ); 1422 } 1423 if_put(ifp0); 1424 pfsyncr.pfsyncr_syncpeer = sc->sc_sync_peer; 1425 pfsyncr.pfsyncr_maxupdates = sc->sc_maxupdates; 1426 pfsyncr.pfsyncr_defer = sc->sc_defer; 1427 return (copyout(&pfsyncr, ifr->ifr_data, sizeof(pfsyncr))); 1428 1429 case SIOCSETPFSYNC: 1430 if ((error = suser(p)) != 0) 1431 return (error); 1432 if ((error = copyin(ifr->ifr_data, &pfsyncr, sizeof(pfsyncr)))) 1433 return (error); 1434 1435 if (pfsyncr.pfsyncr_syncpeer.s_addr == 0) 1436 sc->sc_sync_peer.s_addr = INADDR_PFSYNC_GROUP; 1437 else 1438 sc->sc_sync_peer.s_addr = 1439 pfsyncr.pfsyncr_syncpeer.s_addr; 1440 1441 if (pfsyncr.pfsyncr_maxupdates > 255) 1442 return (EINVAL); 1443 sc->sc_maxupdates = pfsyncr.pfsyncr_maxupdates; 1444 1445 sc->sc_defer = pfsyncr.pfsyncr_defer; 1446 1447 if (pfsyncr.pfsyncr_syncdev[0] == 0) { 1448 if ((ifp0 = if_get(sc->sc_sync_ifidx)) != NULL) { 1449 if_linkstatehook_del(ifp0, &sc->sc_ltask); 1450 if_detachhook_del(ifp0, &sc->sc_dtask); 1451 } 1452 if_put(ifp0); 1453 sc->sc_sync_ifidx = 0; 1454 if (imo->imo_num_memberships > 0) { 1455 in_delmulti(imo->imo_membership[ 1456 --imo->imo_num_memberships]); 1457 imo->imo_ifidx = 0; 1458 } 1459 break; 1460 } 1461 1462 if ((sifp = if_unit(pfsyncr.pfsyncr_syncdev)) == NULL) 1463 return (EINVAL); 1464 1465 ifp0 = if_get(sc->sc_sync_ifidx); 1466 1467 if (sifp->if_mtu < sc->sc_if.if_mtu || (ifp0 != NULL && 1468 sifp->if_mtu < ifp0->if_mtu) || 1469 sifp->if_mtu < MCLBYTES - sizeof(struct ip)) 1470 pfsync_sendout(); 1471 1472 if (ifp0) { 1473 if_linkstatehook_del(ifp0, &sc->sc_ltask); 1474 if_detachhook_del(ifp0, &sc->sc_dtask); 1475 } 1476 if_put(ifp0); 1477 sc->sc_sync_ifidx = sifp->if_index; 1478 1479 if (imo->imo_num_memberships > 0) { 1480 in_delmulti(imo->imo_membership[--imo->imo_num_memberships]); 1481 imo->imo_ifidx = 0; 1482 } 1483 1484 if (sc->sc_sync_peer.s_addr == INADDR_PFSYNC_GROUP) { 1485 struct in_addr addr; 1486 1487 if (!(sifp->if_flags & IFF_MULTICAST)) { 1488 sc->sc_sync_ifidx = 0; 1489 if_put(sifp); 1490 return (EADDRNOTAVAIL); 1491 } 1492 1493 addr.s_addr = INADDR_PFSYNC_GROUP; 1494 1495 if ((imo->imo_membership[0] = 1496 in_addmulti(&addr, sifp)) == NULL) { 1497 sc->sc_sync_ifidx = 0; 1498 if_put(sifp); 1499 return (ENOBUFS); 1500 } 1501 imo->imo_num_memberships++; 1502 imo->imo_ifidx = sc->sc_sync_ifidx; 1503 imo->imo_ttl = PFSYNC_DFLTTL; 1504 imo->imo_loop = 0; 1505 } 1506 1507 ip = &sc->sc_template; 1508 bzero(ip, sizeof(*ip)); 1509 ip->ip_v = IPVERSION; 1510 ip->ip_hl = sizeof(sc->sc_template) >> 2; 1511 ip->ip_tos = IPTOS_LOWDELAY; 1512 /* len and id are set later */ 1513 ip->ip_off = htons(IP_DF); 1514 ip->ip_ttl = PFSYNC_DFLTTL; 1515 ip->ip_p = IPPROTO_PFSYNC; 1516 ip->ip_src.s_addr = INADDR_ANY; 1517 ip->ip_dst.s_addr = sc->sc_sync_peer.s_addr; 1518 1519 if_linkstatehook_add(sifp, &sc->sc_ltask); 1520 if_detachhook_add(sifp, &sc->sc_dtask); 1521 if_put(sifp); 1522 1523 pfsync_request_full_update(sc); 1524 1525 break; 1526 1527 default: 1528 return (ENOTTY); 1529 } 1530 1531 return (0); 1532 } 1533 1534 void 1535 pfsync_out_state(struct pf_state *st, void *buf) 1536 { 1537 struct pfsync_state *sp = buf; 1538 1539 pfsync_state_export(sp, st); 1540 } 1541 1542 void 1543 pfsync_out_iack(struct pf_state *st, void *buf) 1544 { 1545 struct pfsync_ins_ack *iack = buf; 1546 1547 iack->id = st->id; 1548 iack->creatorid = st->creatorid; 1549 } 1550 1551 void 1552 pfsync_out_upd_c(struct pf_state *st, void *buf) 1553 { 1554 struct pfsync_upd_c *up = buf; 1555 1556 bzero(up, sizeof(*up)); 1557 up->id = st->id; 1558 pf_state_peer_hton(&st->src, &up->src); 1559 pf_state_peer_hton(&st->dst, &up->dst); 1560 up->creatorid = st->creatorid; 1561 up->timeout = st->timeout; 1562 } 1563 1564 void 1565 pfsync_out_del(struct pf_state *st, void *buf) 1566 { 1567 struct pfsync_del_c *dp = buf; 1568 1569 dp->id = st->id; 1570 dp->creatorid = st->creatorid; 1571 1572 SET(st->state_flags, PFSTATE_NOSYNC); 1573 } 1574 1575 void 1576 pfsync_grab_snapshot(struct pfsync_snapshot *sn, struct pfsync_softc *sc) 1577 { 1578 int q; 1579 1580 sn->sn_sc = sc; 1581 1582 for (q = 0; q < PFSYNC_S_COUNT; q++) 1583 mtx_enter(&sc->sc_mtx[q]); 1584 1585 mtx_enter(&sc->sc_upd_req_mtx); 1586 mtx_enter(&sc->sc_tdb_mtx); 1587 1588 for (q = 0; q < PFSYNC_S_COUNT; q++) { 1589 TAILQ_INIT(&sn->sn_qs[q]); 1590 TAILQ_CONCAT(&sn->sn_qs[q], &sc->sc_qs[q], sync_list); 1591 } 1592 1593 TAILQ_INIT(&sn->sn_upd_req_list); 1594 TAILQ_CONCAT(&sn->sn_upd_req_list, &sc->sc_upd_req_list, ur_entry); 1595 1596 TAILQ_INIT(&sn->sn_tdb_q); 1597 TAILQ_CONCAT(&sn->sn_tdb_q, &sc->sc_tdb_q, tdb_sync_entry); 1598 1599 sn->sn_len = sc->sc_len; 1600 sc->sc_len = PFSYNC_MINPKT; 1601 1602 sn->sn_plus = sc->sc_plus; 1603 sc->sc_plus = NULL; 1604 sn->sn_pluslen = sc->sc_pluslen; 1605 sc->sc_pluslen = 0; 1606 1607 mtx_leave(&sc->sc_tdb_mtx); 1608 mtx_leave(&sc->sc_upd_req_mtx); 1609 1610 for (q = (PFSYNC_S_COUNT - 1); q >= 0; q--) 1611 mtx_leave(&sc->sc_mtx[q]); 1612 } 1613 1614 void 1615 pfsync_drop_snapshot(struct pfsync_snapshot *sn) 1616 { 1617 struct pf_state *st; 1618 struct pfsync_upd_req_item *ur; 1619 struct tdb *t; 1620 int q; 1621 1622 1623 for (q = 0; q < PFSYNC_S_COUNT; q++) { 1624 if (TAILQ_EMPTY(&sn->sn_qs[q])) 1625 continue; 1626 1627 while ((st = TAILQ_FIRST(&sn->sn_qs[q])) != NULL) { 1628 TAILQ_REMOVE(&sn->sn_qs[q], st, sync_list); 1629 #ifdef PFSYNC_DEBUG 1630 KASSERT(st->sync_state == q); 1631 #endif 1632 st->sync_state = PFSYNC_S_NONE; 1633 pf_state_unref(st); 1634 } 1635 } 1636 1637 while ((ur = TAILQ_FIRST(&sn->sn_upd_req_list)) != NULL) { 1638 TAILQ_REMOVE(&sn->sn_upd_req_list, ur, ur_entry); 1639 pool_put(&sn->sn_sc->sc_pool, ur); 1640 } 1641 1642 while ((t = TAILQ_FIRST(&sn->sn_tdb_q)) != NULL) { 1643 TAILQ_REMOVE(&sn->sn_tdb_q, t, tdb_sync_entry); 1644 CLR(t->tdb_flags, TDBF_PFSYNC); 1645 } 1646 } 1647 1648 int 1649 pfsync_is_snapshot_empty(struct pfsync_snapshot *sn) 1650 { 1651 int q; 1652 1653 for (q = 0; q < PFSYNC_S_COUNT; q++) 1654 if (!TAILQ_EMPTY(&sn->sn_qs[q])) 1655 return (0); 1656 1657 if (!TAILQ_EMPTY(&sn->sn_upd_req_list)) 1658 return (0); 1659 1660 if (!TAILQ_EMPTY(&sn->sn_tdb_q)) 1661 return (0); 1662 1663 return (sn->sn_plus == NULL); 1664 } 1665 1666 void 1667 pfsync_drop(struct pfsync_softc *sc) 1668 { 1669 struct pfsync_snapshot sn; 1670 1671 pfsync_grab_snapshot(&sn, sc); 1672 pfsync_drop_snapshot(&sn); 1673 } 1674 1675 void 1676 pfsync_send_dispatch(void *xmq) 1677 { 1678 struct mbuf_queue *mq = xmq; 1679 struct pfsync_softc *sc; 1680 struct mbuf *m; 1681 struct mbuf_list ml; 1682 int error; 1683 1684 mq_delist(mq, &ml); 1685 if (ml_empty(&ml)) 1686 return; 1687 1688 NET_LOCK(); 1689 sc = pfsyncif; 1690 if (sc == NULL) { 1691 ml_purge(&ml); 1692 goto done; 1693 } 1694 1695 while ((m = ml_dequeue(&ml)) != NULL) { 1696 if ((error = ip_output(m, NULL, NULL, IP_RAWOUTPUT, 1697 &sc->sc_imo, NULL, 0)) == 0) 1698 pfsyncstat_inc(pfsyncs_opackets); 1699 else { 1700 DPFPRINTF(LOG_DEBUG, 1701 "ip_output() @ %s failed (%d)\n", __func__, error); 1702 pfsyncstat_inc(pfsyncs_oerrors); 1703 } 1704 } 1705 done: 1706 NET_UNLOCK(); 1707 } 1708 1709 void 1710 pfsync_send_pkt(struct mbuf *m) 1711 { 1712 if (mq_enqueue(&pfsync_mq, m) != 0) { 1713 pfsyncstat_inc(pfsyncs_oerrors); 1714 DPFPRINTF(LOG_DEBUG, "mq_enqueue() @ %s failed, queue full\n", 1715 __func__); 1716 } else 1717 task_add(net_tq(0), &pfsync_task); 1718 } 1719 1720 void 1721 pfsync_sendout(void) 1722 { 1723 struct pfsync_snapshot sn; 1724 struct pfsync_softc *sc = pfsyncif; 1725 #if NBPFILTER > 0 1726 struct ifnet *ifp = &sc->sc_if; 1727 #endif 1728 struct mbuf *m; 1729 struct ip *ip; 1730 struct pfsync_header *ph; 1731 struct pfsync_subheader *subh; 1732 struct pf_state *st; 1733 struct pfsync_upd_req_item *ur; 1734 struct tdb *t; 1735 int offset; 1736 int q, count = 0; 1737 1738 if (sc == NULL || sc->sc_len == PFSYNC_MINPKT) 1739 return; 1740 1741 if (!ISSET(sc->sc_if.if_flags, IFF_RUNNING) || 1742 #if NBPFILTER > 0 1743 (ifp->if_bpf == NULL && sc->sc_sync_ifidx == 0)) { 1744 #else 1745 sc->sc_sync_ifidx == 0) { 1746 #endif 1747 pfsync_drop(sc); 1748 return; 1749 } 1750 1751 pfsync_grab_snapshot(&sn, sc); 1752 1753 /* 1754 * Check below is sufficient to prevent us from sending empty packets, 1755 * but it does not stop us from sending short packets. 1756 */ 1757 if (pfsync_is_snapshot_empty(&sn)) 1758 return; 1759 1760 MGETHDR(m, M_DONTWAIT, MT_DATA); 1761 if (m == NULL) { 1762 sc->sc_if.if_oerrors++; 1763 pfsyncstat_inc(pfsyncs_onomem); 1764 pfsync_drop_snapshot(&sn); 1765 return; 1766 } 1767 1768 if (max_linkhdr + sn.sn_len > MHLEN) { 1769 MCLGETL(m, M_DONTWAIT, max_linkhdr + sn.sn_len); 1770 if (!ISSET(m->m_flags, M_EXT)) { 1771 m_free(m); 1772 sc->sc_if.if_oerrors++; 1773 pfsyncstat_inc(pfsyncs_onomem); 1774 pfsync_drop_snapshot(&sn); 1775 return; 1776 } 1777 } 1778 m->m_data += max_linkhdr; 1779 m->m_len = m->m_pkthdr.len = sn.sn_len; 1780 1781 /* build the ip header */ 1782 ip = mtod(m, struct ip *); 1783 bcopy(&sc->sc_template, ip, sizeof(*ip)); 1784 offset = sizeof(*ip); 1785 1786 ip->ip_len = htons(m->m_pkthdr.len); 1787 ip->ip_id = htons(ip_randomid()); 1788 1789 /* build the pfsync header */ 1790 ph = (struct pfsync_header *)(m->m_data + offset); 1791 bzero(ph, sizeof(*ph)); 1792 offset += sizeof(*ph); 1793 1794 ph->version = PFSYNC_VERSION; 1795 ph->len = htons(sn.sn_len - sizeof(*ip)); 1796 bcopy(pf_status.pf_chksum, ph->pfcksum, PF_MD5_DIGEST_LENGTH); 1797 1798 if (!TAILQ_EMPTY(&sn.sn_upd_req_list)) { 1799 subh = (struct pfsync_subheader *)(m->m_data + offset); 1800 offset += sizeof(*subh); 1801 1802 count = 0; 1803 while ((ur = TAILQ_FIRST(&sn.sn_upd_req_list)) != NULL) { 1804 TAILQ_REMOVE(&sn.sn_upd_req_list, ur, ur_entry); 1805 1806 bcopy(&ur->ur_msg, m->m_data + offset, 1807 sizeof(ur->ur_msg)); 1808 offset += sizeof(ur->ur_msg); 1809 1810 pool_put(&sc->sc_pool, ur); 1811 1812 count++; 1813 } 1814 1815 bzero(subh, sizeof(*subh)); 1816 subh->len = sizeof(ur->ur_msg) >> 2; 1817 subh->action = PFSYNC_ACT_UPD_REQ; 1818 subh->count = htons(count); 1819 } 1820 1821 /* has someone built a custom region for us to add? */ 1822 if (sn.sn_plus != NULL) { 1823 bcopy(sn.sn_plus, m->m_data + offset, sn.sn_pluslen); 1824 offset += sn.sn_pluslen; 1825 sn.sn_plus = NULL; /* XXX memory leak ? */ 1826 } 1827 1828 if (!TAILQ_EMPTY(&sn.sn_tdb_q)) { 1829 subh = (struct pfsync_subheader *)(m->m_data + offset); 1830 offset += sizeof(*subh); 1831 1832 count = 0; 1833 while ((t = TAILQ_FIRST(&sn.sn_tdb_q)) != NULL) { 1834 TAILQ_REMOVE(&sn.sn_tdb_q, t, tdb_sync_entry); 1835 pfsync_out_tdb(t, m->m_data + offset); 1836 offset += sizeof(struct pfsync_tdb); 1837 CLR(t->tdb_flags, TDBF_PFSYNC); 1838 count++; 1839 } 1840 1841 bzero(subh, sizeof(*subh)); 1842 subh->action = PFSYNC_ACT_TDB; 1843 subh->len = sizeof(struct pfsync_tdb) >> 2; 1844 subh->count = htons(count); 1845 } 1846 1847 /* walk the queues */ 1848 for (q = 0; q < PFSYNC_S_COUNT; q++) { 1849 if (TAILQ_EMPTY(&sn.sn_qs[q])) 1850 continue; 1851 1852 subh = (struct pfsync_subheader *)(m->m_data + offset); 1853 offset += sizeof(*subh); 1854 1855 count = 0; 1856 while ((st = TAILQ_FIRST(&sn.sn_qs[q])) != NULL) { 1857 TAILQ_REMOVE(&sn.sn_qs[q], st, sync_list); 1858 #ifdef PFSYNC_DEBUG 1859 KASSERT(st->sync_state == q); 1860 #endif 1861 st->sync_state = PFSYNC_S_NONE; 1862 pfsync_qs[q].write(st, m->m_data + offset); 1863 offset += pfsync_qs[q].len; 1864 1865 pf_state_unref(st); 1866 count++; 1867 } 1868 1869 bzero(subh, sizeof(*subh)); 1870 subh->action = pfsync_qs[q].action; 1871 subh->len = pfsync_qs[q].len >> 2; 1872 subh->count = htons(count); 1873 } 1874 1875 /* we're done, let's put it on the wire */ 1876 #if NBPFILTER > 0 1877 if (ifp->if_bpf) { 1878 m->m_data += sizeof(*ip); 1879 m->m_len = m->m_pkthdr.len = sn.sn_len - sizeof(*ip); 1880 bpf_mtap(ifp->if_bpf, m, BPF_DIRECTION_OUT); 1881 m->m_data -= sizeof(*ip); 1882 m->m_len = m->m_pkthdr.len = sn.sn_len; 1883 } 1884 1885 if (sc->sc_sync_ifidx == 0) { 1886 sc->sc_len = PFSYNC_MINPKT; 1887 m_freem(m); 1888 return; 1889 } 1890 #endif 1891 1892 sc->sc_if.if_opackets++; 1893 sc->sc_if.if_obytes += m->m_pkthdr.len; 1894 1895 m->m_pkthdr.ph_rtableid = sc->sc_if.if_rdomain; 1896 1897 pfsync_send_pkt(m); 1898 } 1899 1900 void 1901 pfsync_insert_state(struct pf_state *st) 1902 { 1903 struct pfsync_softc *sc = pfsyncif; 1904 1905 NET_ASSERT_LOCKED(); 1906 1907 if (ISSET(st->rule.ptr->rule_flag, PFRULE_NOSYNC) || 1908 st->key[PF_SK_WIRE]->proto == IPPROTO_PFSYNC) { 1909 SET(st->state_flags, PFSTATE_NOSYNC); 1910 return; 1911 } 1912 1913 if (sc == NULL || !ISSET(sc->sc_if.if_flags, IFF_RUNNING) || 1914 ISSET(st->state_flags, PFSTATE_NOSYNC)) 1915 return; 1916 1917 #ifdef PFSYNC_DEBUG 1918 KASSERT(st->sync_state == PFSYNC_S_NONE); 1919 #endif 1920 1921 if (sc->sc_len == PFSYNC_MINPKT) 1922 timeout_add_sec(&sc->sc_tmo, 1); 1923 1924 pfsync_q_ins(st, PFSYNC_S_INS); 1925 1926 st->sync_updates = 0; 1927 } 1928 1929 int 1930 pfsync_defer(struct pf_state *st, struct mbuf *m) 1931 { 1932 struct pfsync_softc *sc = pfsyncif; 1933 struct pfsync_deferral *pd; 1934 1935 NET_ASSERT_LOCKED(); 1936 1937 if (!sc->sc_defer || 1938 ISSET(st->state_flags, PFSTATE_NOSYNC) || 1939 m->m_flags & (M_BCAST|M_MCAST)) 1940 return (0); 1941 1942 if (sc->sc_deferred >= 128) { 1943 mtx_enter(&sc->sc_deferrals_mtx); 1944 pd = TAILQ_FIRST(&sc->sc_deferrals); 1945 TAILQ_REMOVE(&sc->sc_deferrals, pd, pd_entry); 1946 sc->sc_deferred--; 1947 mtx_leave(&sc->sc_deferrals_mtx); 1948 if (timeout_del(&pd->pd_tmo)) 1949 pfsync_undefer(pd, 0); 1950 } 1951 1952 pd = pool_get(&sc->sc_pool, M_NOWAIT); 1953 if (pd == NULL) 1954 return (0); 1955 1956 m->m_pkthdr.pf.flags |= PF_TAG_GENERATED; 1957 SET(st->state_flags, PFSTATE_ACK); 1958 1959 pd->pd_st = pf_state_ref(st); 1960 pd->pd_m = m; 1961 1962 mtx_enter(&sc->sc_deferrals_mtx); 1963 sc->sc_deferred++; 1964 TAILQ_INSERT_TAIL(&sc->sc_deferrals, pd, pd_entry); 1965 mtx_leave(&sc->sc_deferrals_mtx); 1966 1967 timeout_set_proc(&pd->pd_tmo, pfsync_defer_tmo, pd); 1968 timeout_add_msec(&pd->pd_tmo, 20); 1969 1970 schednetisr(NETISR_PFSYNC); 1971 1972 return (1); 1973 } 1974 1975 void 1976 pfsync_undefer_notify(struct pfsync_deferral *pd) 1977 { 1978 struct pf_pdesc pdesc; 1979 struct pf_state *st = pd->pd_st; 1980 1981 if (st->rt == PF_ROUTETO) { 1982 if (pf_setup_pdesc(&pdesc, st->key[PF_SK_WIRE]->af, 1983 st->direction, st->kif, pd->pd_m, NULL) != PF_PASS) { 1984 m_freem(pd->pd_m); 1985 return; 1986 } 1987 switch (st->key[PF_SK_WIRE]->af) { 1988 case AF_INET: 1989 pf_route(&pdesc, st); 1990 break; 1991 #ifdef INET6 1992 case AF_INET6: 1993 pf_route6(&pdesc, st); 1994 break; 1995 #endif /* INET6 */ 1996 default: 1997 unhandled_af(st->key[PF_SK_WIRE]->af); 1998 } 1999 pd->pd_m = pdesc.m; 2000 } else { 2001 switch (st->key[PF_SK_WIRE]->af) { 2002 case AF_INET: 2003 ip_output(pd->pd_m, NULL, NULL, 0, NULL, NULL, 0); 2004 break; 2005 #ifdef INET6 2006 case AF_INET6: 2007 ip6_output(pd->pd_m, NULL, NULL, 0, NULL, NULL); 2008 break; 2009 #endif /* INET6 */ 2010 default: 2011 unhandled_af(st->key[PF_SK_WIRE]->af); 2012 } 2013 2014 pd->pd_m = NULL; 2015 } 2016 } 2017 2018 void 2019 pfsync_free_deferral(struct pfsync_deferral *pd) 2020 { 2021 struct pfsync_softc *sc = pfsyncif; 2022 2023 pf_state_unref(pd->pd_st); 2024 if (pd->pd_m != NULL) 2025 m_freem(pd->pd_m); 2026 pool_put(&sc->sc_pool, pd); 2027 } 2028 2029 void 2030 pfsync_undefer(struct pfsync_deferral *pd, int drop) 2031 { 2032 struct pfsync_softc *sc = pfsyncif; 2033 2034 NET_ASSERT_LOCKED(); 2035 2036 if (sc == NULL) 2037 return; 2038 2039 CLR(pd->pd_st->state_flags, PFSTATE_ACK); 2040 if (drop) { 2041 m_freem(pd->pd_m); 2042 pd->pd_m = NULL; 2043 } else 2044 pfsync_undefer_notify(pd); 2045 2046 pfsync_free_deferral(pd); 2047 } 2048 2049 void 2050 pfsync_defer_tmo(void *arg) 2051 { 2052 struct pfsync_softc *sc = pfsyncif; 2053 struct pfsync_deferral *pd = arg; 2054 2055 mtx_enter(&sc->sc_deferrals_mtx); 2056 TAILQ_REMOVE(&sc->sc_deferrals, pd, pd_entry); 2057 sc->sc_deferred--; 2058 mtx_leave(&sc->sc_deferrals_mtx); 2059 NET_LOCK(); 2060 pfsync_undefer(pd, 0); 2061 NET_UNLOCK(); 2062 } 2063 2064 void 2065 pfsync_deferred(struct pf_state *st, int drop) 2066 { 2067 struct pfsync_softc *sc = pfsyncif; 2068 struct pfsync_deferral *pd; 2069 2070 NET_ASSERT_LOCKED(); 2071 2072 mtx_enter(&sc->sc_deferrals_mtx); 2073 TAILQ_FOREACH(pd, &sc->sc_deferrals, pd_entry) { 2074 if (pd->pd_st == st) { 2075 if (timeout_del(&pd->pd_tmo)) { 2076 TAILQ_REMOVE(&sc->sc_deferrals, pd, pd_entry); 2077 sc->sc_deferred--; 2078 mtx_leave(&sc->sc_deferrals_mtx); 2079 pfsync_undefer(pd, drop); 2080 } else 2081 mtx_leave(&sc->sc_deferrals_mtx); 2082 return; 2083 } 2084 } 2085 mtx_leave(&sc->sc_deferrals_mtx); 2086 } 2087 2088 void 2089 pfsync_update_state(struct pf_state *st) 2090 { 2091 struct pfsync_softc *sc = pfsyncif; 2092 int sync = 0; 2093 2094 NET_ASSERT_LOCKED(); 2095 2096 if (sc == NULL || !ISSET(sc->sc_if.if_flags, IFF_RUNNING)) 2097 return; 2098 2099 if (ISSET(st->state_flags, PFSTATE_ACK)) 2100 pfsync_deferred(st, 0); 2101 if (ISSET(st->state_flags, PFSTATE_NOSYNC)) { 2102 if (st->sync_state != PFSYNC_S_NONE) 2103 pfsync_q_del(st); 2104 return; 2105 } 2106 2107 if (sc->sc_len == PFSYNC_MINPKT) 2108 timeout_add_sec(&sc->sc_tmo, 1); 2109 2110 switch (st->sync_state) { 2111 case PFSYNC_S_UPD_C: 2112 case PFSYNC_S_UPD: 2113 case PFSYNC_S_INS: 2114 /* we're already handling it */ 2115 2116 if (st->key[PF_SK_WIRE]->proto == IPPROTO_TCP) { 2117 st->sync_updates++; 2118 if (st->sync_updates >= sc->sc_maxupdates) 2119 sync = 1; 2120 } 2121 break; 2122 2123 case PFSYNC_S_IACK: 2124 pfsync_q_del(st); 2125 case PFSYNC_S_NONE: 2126 pfsync_q_ins(st, PFSYNC_S_UPD_C); 2127 st->sync_updates = 0; 2128 break; 2129 2130 default: 2131 panic("pfsync_update_state: unexpected sync state %d", 2132 st->sync_state); 2133 } 2134 2135 if (sync || (getuptime() - st->pfsync_time) < 2) 2136 schednetisr(NETISR_PFSYNC); 2137 } 2138 2139 void 2140 pfsync_cancel_full_update(struct pfsync_softc *sc) 2141 { 2142 if (timeout_pending(&sc->sc_bulkfail_tmo) || 2143 timeout_pending(&sc->sc_bulk_tmo)) { 2144 #if NCARP > 0 2145 if (!pfsync_sync_ok) 2146 carp_group_demote_adj(&sc->sc_if, -1, 2147 "pfsync bulk cancelled"); 2148 if (sc->sc_initial_bulk) { 2149 carp_group_demote_adj(&sc->sc_if, -32, 2150 "pfsync init"); 2151 sc->sc_initial_bulk = 0; 2152 } 2153 #endif 2154 pfsync_sync_ok = 1; 2155 DPFPRINTF(LOG_INFO, "cancelling bulk update"); 2156 } 2157 timeout_del(&sc->sc_bulkfail_tmo); 2158 timeout_del(&sc->sc_bulk_tmo); 2159 sc->sc_bulk_next = NULL; 2160 sc->sc_bulk_last = NULL; 2161 sc->sc_ureq_sent = 0; 2162 sc->sc_bulk_tries = 0; 2163 } 2164 2165 void 2166 pfsync_request_full_update(struct pfsync_softc *sc) 2167 { 2168 if (sc->sc_sync_ifidx != 0 && ISSET(sc->sc_if.if_flags, IFF_RUNNING)) { 2169 /* Request a full state table update. */ 2170 sc->sc_ureq_sent = getuptime(); 2171 #if NCARP > 0 2172 if (!sc->sc_link_demoted && pfsync_sync_ok) 2173 carp_group_demote_adj(&sc->sc_if, 1, 2174 "pfsync bulk start"); 2175 #endif 2176 pfsync_sync_ok = 0; 2177 DPFPRINTF(LOG_INFO, "requesting bulk update"); 2178 timeout_add(&sc->sc_bulkfail_tmo, 4 * hz + 2179 pf_pool_limits[PF_LIMIT_STATES].limit / 2180 ((sc->sc_if.if_mtu - PFSYNC_MINPKT) / 2181 sizeof(struct pfsync_state))); 2182 pfsync_request_update(0, 0); 2183 } 2184 } 2185 2186 void 2187 pfsync_request_update(u_int32_t creatorid, u_int64_t id) 2188 { 2189 struct pfsync_softc *sc = pfsyncif; 2190 struct pfsync_upd_req_item *item; 2191 size_t nlen, sc_len; 2192 2193 /* 2194 * this code does nothing to prevent multiple update requests for the 2195 * same state being generated. 2196 */ 2197 2198 item = pool_get(&sc->sc_pool, PR_NOWAIT); 2199 if (item == NULL) { 2200 /* XXX stats */ 2201 return; 2202 } 2203 2204 item->ur_msg.id = id; 2205 item->ur_msg.creatorid = creatorid; 2206 2207 do { 2208 mtx_enter(&sc->sc_upd_req_mtx); 2209 2210 nlen = sizeof(struct pfsync_upd_req); 2211 if (TAILQ_EMPTY(&sc->sc_upd_req_list)) 2212 nlen += sizeof(struct pfsync_subheader); 2213 2214 sc_len = atomic_add_long_nv(&sc->sc_len, nlen); 2215 if (sc_len > sc->sc_if.if_mtu) { 2216 atomic_sub_long(&sc->sc_len, nlen); 2217 mtx_leave(&sc->sc_upd_req_mtx); 2218 pfsync_sendout(); 2219 continue; 2220 } 2221 2222 TAILQ_INSERT_TAIL(&sc->sc_upd_req_list, item, ur_entry); 2223 mtx_leave(&sc->sc_upd_req_mtx); 2224 } while (0); 2225 2226 schednetisr(NETISR_PFSYNC); 2227 } 2228 2229 void 2230 pfsync_update_state_req(struct pf_state *st) 2231 { 2232 struct pfsync_softc *sc = pfsyncif; 2233 2234 if (sc == NULL) 2235 panic("pfsync_update_state_req: nonexistent instance"); 2236 2237 if (ISSET(st->state_flags, PFSTATE_NOSYNC)) { 2238 if (st->sync_state != PFSYNC_S_NONE) 2239 pfsync_q_del(st); 2240 return; 2241 } 2242 2243 switch (st->sync_state) { 2244 case PFSYNC_S_UPD_C: 2245 case PFSYNC_S_IACK: 2246 pfsync_q_del(st); 2247 case PFSYNC_S_NONE: 2248 pfsync_q_ins(st, PFSYNC_S_UPD); 2249 schednetisr(NETISR_PFSYNC); 2250 return; 2251 2252 case PFSYNC_S_INS: 2253 case PFSYNC_S_UPD: 2254 case PFSYNC_S_DEL: 2255 /* we're already handling it */ 2256 return; 2257 2258 default: 2259 panic("pfsync_update_state_req: unexpected sync state %d", 2260 st->sync_state); 2261 } 2262 } 2263 2264 void 2265 pfsync_delete_state(struct pf_state *st) 2266 { 2267 struct pfsync_softc *sc = pfsyncif; 2268 2269 NET_ASSERT_LOCKED(); 2270 2271 if (sc == NULL || !ISSET(sc->sc_if.if_flags, IFF_RUNNING)) 2272 return; 2273 2274 if (ISSET(st->state_flags, PFSTATE_ACK)) 2275 pfsync_deferred(st, 1); 2276 if (ISSET(st->state_flags, PFSTATE_NOSYNC)) { 2277 if (st->sync_state != PFSYNC_S_NONE) 2278 pfsync_q_del(st); 2279 return; 2280 } 2281 2282 if (sc->sc_len == PFSYNC_MINPKT) 2283 timeout_add_sec(&sc->sc_tmo, 1); 2284 2285 switch (st->sync_state) { 2286 case PFSYNC_S_INS: 2287 /* we never got to tell the world so just forget about it */ 2288 pfsync_q_del(st); 2289 return; 2290 2291 case PFSYNC_S_UPD_C: 2292 case PFSYNC_S_UPD: 2293 case PFSYNC_S_IACK: 2294 pfsync_q_del(st); 2295 /* 2296 * FALLTHROUGH to putting it on the del list 2297 * Note on reference count bookkeeping: 2298 * pfsync_q_del() drops reference for queue 2299 * ownership. But the st entry survives, because 2300 * our caller still holds a reference. 2301 */ 2302 2303 case PFSYNC_S_NONE: 2304 /* 2305 * We either fall through here, or there is no reference to 2306 * st owned by pfsync queues at this point. 2307 * 2308 * Calling pfsync_q_ins() puts st to del queue. The pfsync_q_ins() 2309 * grabs a reference for delete queue. 2310 */ 2311 pfsync_q_ins(st, PFSYNC_S_DEL); 2312 return; 2313 2314 default: 2315 panic("pfsync_delete_state: unexpected sync state %d", 2316 st->sync_state); 2317 } 2318 } 2319 2320 void 2321 pfsync_clear_states(u_int32_t creatorid, const char *ifname) 2322 { 2323 struct pfsync_softc *sc = pfsyncif; 2324 struct { 2325 struct pfsync_subheader subh; 2326 struct pfsync_clr clr; 2327 } __packed r; 2328 2329 NET_ASSERT_LOCKED(); 2330 2331 if (sc == NULL || !ISSET(sc->sc_if.if_flags, IFF_RUNNING)) 2332 return; 2333 2334 bzero(&r, sizeof(r)); 2335 2336 r.subh.action = PFSYNC_ACT_CLR; 2337 r.subh.len = sizeof(struct pfsync_clr) >> 2; 2338 r.subh.count = htons(1); 2339 2340 strlcpy(r.clr.ifname, ifname, sizeof(r.clr.ifname)); 2341 r.clr.creatorid = creatorid; 2342 2343 pfsync_send_plus(&r, sizeof(r)); 2344 } 2345 2346 void 2347 pfsync_q_ins(struct pf_state *st, int q) 2348 { 2349 struct pfsync_softc *sc = pfsyncif; 2350 size_t nlen, sc_len; 2351 2352 KASSERT(st->sync_state == PFSYNC_S_NONE); 2353 2354 #if defined(PFSYNC_DEBUG) 2355 if (sc->sc_len < PFSYNC_MINPKT) 2356 panic("pfsync pkt len is too low %zd", sc->sc_len); 2357 #endif 2358 do { 2359 mtx_enter(&sc->sc_mtx[q]); 2360 2361 /* 2362 * If two threads are competing to insert the same state, then 2363 * there must be just single winner. 2364 */ 2365 if (st->sync_state != PFSYNC_S_NONE) { 2366 mtx_leave(&sc->sc_mtx[q]); 2367 break; 2368 } 2369 2370 nlen = pfsync_qs[q].len; 2371 2372 if (TAILQ_EMPTY(&sc->sc_qs[q])) 2373 nlen += sizeof(struct pfsync_subheader); 2374 2375 sc_len = atomic_add_long_nv(&sc->sc_len, nlen); 2376 if (sc_len > sc->sc_if.if_mtu) { 2377 atomic_sub_long(&sc->sc_len, nlen); 2378 mtx_leave(&sc->sc_mtx[q]); 2379 pfsync_sendout(); 2380 continue; 2381 } 2382 2383 pf_state_ref(st); 2384 2385 TAILQ_INSERT_TAIL(&sc->sc_qs[q], st, sync_list); 2386 st->sync_state = q; 2387 mtx_leave(&sc->sc_mtx[q]); 2388 } while (0); 2389 } 2390 2391 void 2392 pfsync_q_del(struct pf_state *st) 2393 { 2394 struct pfsync_softc *sc = pfsyncif; 2395 int q = st->sync_state; 2396 2397 KASSERT(st->sync_state != PFSYNC_S_NONE); 2398 2399 mtx_enter(&sc->sc_mtx[q]); 2400 atomic_sub_long(&sc->sc_len, pfsync_qs[q].len); 2401 TAILQ_REMOVE(&sc->sc_qs[q], st, sync_list); 2402 if (TAILQ_EMPTY(&sc->sc_qs[q])) 2403 atomic_sub_long(&sc->sc_len, sizeof (struct pfsync_subheader)); 2404 mtx_leave(&sc->sc_mtx[q]); 2405 2406 st->sync_state = PFSYNC_S_NONE; 2407 pf_state_unref(st); 2408 } 2409 2410 void 2411 pfsync_update_tdb(struct tdb *t, int output) 2412 { 2413 struct pfsync_softc *sc = pfsyncif; 2414 size_t nlen, sc_len; 2415 2416 if (sc == NULL) 2417 return; 2418 2419 if (!ISSET(t->tdb_flags, TDBF_PFSYNC)) { 2420 do { 2421 mtx_enter(&sc->sc_tdb_mtx); 2422 nlen = sizeof(struct pfsync_tdb); 2423 2424 if (TAILQ_EMPTY(&sc->sc_tdb_q)) 2425 nlen += sizeof(struct pfsync_subheader); 2426 2427 sc_len = atomic_add_long_nv(&sc->sc_len, nlen); 2428 if (sc_len > sc->sc_if.if_mtu) { 2429 atomic_sub_long(&sc->sc_len, nlen); 2430 mtx_leave(&sc->sc_tdb_mtx); 2431 pfsync_sendout(); 2432 continue; 2433 } 2434 2435 TAILQ_INSERT_TAIL(&sc->sc_tdb_q, t, tdb_sync_entry); 2436 mtx_leave(&sc->sc_tdb_mtx); 2437 2438 SET(t->tdb_flags, TDBF_PFSYNC); 2439 t->tdb_updates = 0; 2440 } while (0); 2441 } else { 2442 if (++t->tdb_updates >= sc->sc_maxupdates) 2443 schednetisr(NETISR_PFSYNC); 2444 } 2445 2446 if (output) 2447 SET(t->tdb_flags, TDBF_PFSYNC_RPL); 2448 else 2449 CLR(t->tdb_flags, TDBF_PFSYNC_RPL); 2450 } 2451 2452 void 2453 pfsync_delete_tdb(struct tdb *t) 2454 { 2455 struct pfsync_softc *sc = pfsyncif; 2456 size_t nlen; 2457 2458 if (sc == NULL || !ISSET(t->tdb_flags, TDBF_PFSYNC)) 2459 return; 2460 2461 mtx_enter(&sc->sc_tdb_mtx); 2462 2463 TAILQ_REMOVE(&sc->sc_tdb_q, t, tdb_sync_entry); 2464 CLR(t->tdb_flags, TDBF_PFSYNC); 2465 2466 nlen = sizeof(struct pfsync_tdb); 2467 if (TAILQ_EMPTY(&sc->sc_tdb_q)) 2468 nlen += sizeof(struct pfsync_subheader); 2469 atomic_sub_long(&sc->sc_len, nlen); 2470 2471 mtx_leave(&sc->sc_tdb_mtx); 2472 } 2473 2474 void 2475 pfsync_out_tdb(struct tdb *t, void *buf) 2476 { 2477 struct pfsync_tdb *ut = buf; 2478 2479 bzero(ut, sizeof(*ut)); 2480 ut->spi = t->tdb_spi; 2481 bcopy(&t->tdb_dst, &ut->dst, sizeof(ut->dst)); 2482 /* 2483 * When a failover happens, the master's rpl is probably above 2484 * what we see here (we may be up to a second late), so 2485 * increase it a bit for outbound tdbs to manage most such 2486 * situations. 2487 * 2488 * For now, just add an offset that is likely to be larger 2489 * than the number of packets we can see in one second. The RFC 2490 * just says the next packet must have a higher seq value. 2491 * 2492 * XXX What is a good algorithm for this? We could use 2493 * a rate-determined increase, but to know it, we would have 2494 * to extend struct tdb. 2495 * XXX pt->rpl can wrap over MAXINT, but if so the real tdb 2496 * will soon be replaced anyway. For now, just don't handle 2497 * this edge case. 2498 */ 2499 #define RPL_INCR 16384 2500 ut->rpl = htobe64(t->tdb_rpl + (ISSET(t->tdb_flags, TDBF_PFSYNC_RPL) ? 2501 RPL_INCR : 0)); 2502 ut->cur_bytes = htobe64(t->tdb_cur_bytes); 2503 ut->sproto = t->tdb_sproto; 2504 ut->rdomain = htons(t->tdb_rdomain); 2505 } 2506 2507 void 2508 pfsync_bulk_start(void) 2509 { 2510 struct pfsync_softc *sc = pfsyncif; 2511 2512 DPFPRINTF(LOG_INFO, "received bulk update request"); 2513 2514 if (TAILQ_EMPTY(&state_list)) 2515 pfsync_bulk_status(PFSYNC_BUS_END); 2516 else { 2517 sc->sc_ureq_received = getuptime(); 2518 2519 if (sc->sc_bulk_next == NULL) { 2520 PF_STATE_ENTER_READ(); 2521 sc->sc_bulk_next = TAILQ_FIRST(&state_list); 2522 pf_state_ref(sc->sc_bulk_next); 2523 PF_STATE_EXIT_READ(); 2524 } 2525 sc->sc_bulk_last = sc->sc_bulk_next; 2526 pf_state_ref(sc->sc_bulk_last); 2527 2528 pfsync_bulk_status(PFSYNC_BUS_START); 2529 timeout_add(&sc->sc_bulk_tmo, 0); 2530 } 2531 } 2532 2533 void 2534 pfsync_bulk_update(void *arg) 2535 { 2536 struct pfsync_softc *sc; 2537 struct pf_state *st, *st_next; 2538 int i = 0; 2539 2540 NET_LOCK(); 2541 sc = pfsyncif; 2542 if (sc == NULL) 2543 goto out; 2544 st = sc->sc_bulk_next; 2545 sc->sc_bulk_next = NULL; 2546 2547 for (;;) { 2548 if (st->sync_state == PFSYNC_S_NONE && 2549 st->timeout < PFTM_MAX && 2550 st->pfsync_time <= sc->sc_ureq_received) { 2551 pfsync_update_state_req(st); 2552 i++; 2553 } 2554 2555 /* 2556 * I wonder how we prevent infinite bulk update. IMO it can 2557 * happen when sc_bulk_last state expires before we iterate 2558 * through the whole list. 2559 */ 2560 PF_STATE_ENTER_READ(); 2561 st_next = TAILQ_NEXT(st, entry_list); 2562 pf_state_unref(st); 2563 st = st_next; 2564 if (st == NULL) 2565 st = TAILQ_FIRST(&state_list); 2566 pf_state_ref(st); 2567 PF_STATE_EXIT_READ(); 2568 2569 if ((st == NULL) || (st == sc->sc_bulk_last)) { 2570 /* we're done */ 2571 pf_state_unref(sc->sc_bulk_last); 2572 sc->sc_bulk_last = NULL; 2573 pfsync_bulk_status(PFSYNC_BUS_END); 2574 break; 2575 } 2576 2577 if (i > 1 && (sc->sc_if.if_mtu - sc->sc_len) < 2578 sizeof(struct pfsync_state)) { 2579 /* we've filled a packet */ 2580 sc->sc_bulk_next = st; 2581 timeout_add(&sc->sc_bulk_tmo, 1); 2582 break; 2583 } 2584 } 2585 out: 2586 NET_UNLOCK(); 2587 } 2588 2589 void 2590 pfsync_bulk_status(u_int8_t status) 2591 { 2592 struct { 2593 struct pfsync_subheader subh; 2594 struct pfsync_bus bus; 2595 } __packed r; 2596 2597 struct pfsync_softc *sc = pfsyncif; 2598 2599 bzero(&r, sizeof(r)); 2600 2601 r.subh.action = PFSYNC_ACT_BUS; 2602 r.subh.len = sizeof(struct pfsync_bus) >> 2; 2603 r.subh.count = htons(1); 2604 2605 r.bus.creatorid = pf_status.hostid; 2606 r.bus.endtime = htonl(getuptime() - sc->sc_ureq_received); 2607 r.bus.status = status; 2608 2609 pfsync_send_plus(&r, sizeof(r)); 2610 } 2611 2612 void 2613 pfsync_bulk_fail(void *arg) 2614 { 2615 struct pfsync_softc *sc; 2616 2617 NET_LOCK(); 2618 sc = pfsyncif; 2619 if (sc == NULL) 2620 goto out; 2621 if (sc->sc_bulk_tries++ < PFSYNC_MAX_BULKTRIES) { 2622 /* Try again */ 2623 timeout_add_sec(&sc->sc_bulkfail_tmo, 5); 2624 pfsync_request_update(0, 0); 2625 } else { 2626 /* Pretend like the transfer was ok */ 2627 sc->sc_ureq_sent = 0; 2628 sc->sc_bulk_tries = 0; 2629 #if NCARP > 0 2630 if (!pfsync_sync_ok) 2631 carp_group_demote_adj(&sc->sc_if, -1, 2632 sc->sc_link_demoted ? 2633 "pfsync link state up" : 2634 "pfsync bulk fail"); 2635 if (sc->sc_initial_bulk) { 2636 carp_group_demote_adj(&sc->sc_if, -32, 2637 "pfsync init"); 2638 sc->sc_initial_bulk = 0; 2639 } 2640 #endif 2641 pfsync_sync_ok = 1; 2642 sc->sc_link_demoted = 0; 2643 DPFPRINTF(LOG_ERR, "failed to receive bulk update"); 2644 } 2645 out: 2646 NET_UNLOCK(); 2647 } 2648 2649 void 2650 pfsync_send_plus(void *plus, size_t pluslen) 2651 { 2652 struct pfsync_softc *sc = pfsyncif; 2653 2654 if (sc->sc_len + pluslen > sc->sc_if.if_mtu) 2655 pfsync_sendout(); 2656 2657 sc->sc_plus = plus; 2658 sc->sc_len += (sc->sc_pluslen = pluslen); 2659 2660 pfsync_sendout(); 2661 } 2662 2663 int 2664 pfsync_up(void) 2665 { 2666 struct pfsync_softc *sc = pfsyncif; 2667 2668 if (sc == NULL || !ISSET(sc->sc_if.if_flags, IFF_RUNNING)) 2669 return (0); 2670 2671 return (1); 2672 } 2673 2674 int 2675 pfsync_state_in_use(struct pf_state *st) 2676 { 2677 struct pfsync_softc *sc = pfsyncif; 2678 2679 if (sc == NULL) 2680 return (0); 2681 2682 if (st->sync_state != PFSYNC_S_NONE || 2683 st == sc->sc_bulk_next || 2684 st == sc->sc_bulk_last) 2685 return (1); 2686 2687 return (0); 2688 } 2689 2690 void 2691 pfsync_timeout(void *arg) 2692 { 2693 NET_LOCK(); 2694 pfsync_sendout(); 2695 NET_UNLOCK(); 2696 } 2697 2698 /* this is a softnet/netisr handler */ 2699 void 2700 pfsyncintr(void) 2701 { 2702 pfsync_sendout(); 2703 } 2704 2705 int 2706 pfsync_sysctl_pfsyncstat(void *oldp, size_t *oldlenp, void *newp) 2707 { 2708 struct pfsyncstats pfsyncstat; 2709 2710 CTASSERT(sizeof(pfsyncstat) == (pfsyncs_ncounters * sizeof(uint64_t))); 2711 memset(&pfsyncstat, 0, sizeof pfsyncstat); 2712 counters_read(pfsynccounters, (uint64_t *)&pfsyncstat, 2713 pfsyncs_ncounters); 2714 return (sysctl_rdstruct(oldp, oldlenp, newp, 2715 &pfsyncstat, sizeof(pfsyncstat))); 2716 } 2717 2718 int 2719 pfsync_sysctl(int *name, u_int namelen, void *oldp, size_t *oldlenp, void *newp, 2720 size_t newlen) 2721 { 2722 /* All sysctl names at this level are terminal. */ 2723 if (namelen != 1) 2724 return (ENOTDIR); 2725 2726 switch (name[0]) { 2727 case PFSYNCCTL_STATS: 2728 return (pfsync_sysctl_pfsyncstat(oldp, oldlenp, newp)); 2729 default: 2730 return (ENOPROTOOPT); 2731 } 2732 } 2733