1 /* $OpenBSD: if_pfsync.c,v 1.315 2023/05/18 12:10:04 sashan 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_DEFER_NSEC 20000000ULL 97 98 #define PFSYNC_MINPKT ( \ 99 sizeof(struct ip) + \ 100 sizeof(struct pfsync_header)) 101 102 int pfsync_upd_tcp(struct pf_state *, struct pfsync_state_peer *, 103 struct pfsync_state_peer *); 104 105 int pfsync_in_clr(caddr_t, int, int, int); 106 int pfsync_in_iack(caddr_t, int, int, int); 107 int pfsync_in_upd_c(caddr_t, int, int, int); 108 int pfsync_in_ureq(caddr_t, int, int, int); 109 int pfsync_in_del(caddr_t, int, int, int); 110 int pfsync_in_del_c(caddr_t, int, int, int); 111 int pfsync_in_bus(caddr_t, int, int, int); 112 int pfsync_in_tdb(caddr_t, int, int, int); 113 int pfsync_in_ins(caddr_t, int, int, int); 114 int pfsync_in_upd(caddr_t, int, int, int); 115 int pfsync_in_eof(caddr_t, int, int, int); 116 117 int pfsync_in_error(caddr_t, int, int, int); 118 119 void pfsync_update_state_locked(struct pf_state *); 120 121 const struct { 122 int (*in)(caddr_t, int, int, int); 123 size_t len; 124 } pfsync_acts[] = { 125 /* PFSYNC_ACT_CLR */ 126 { pfsync_in_clr, sizeof(struct pfsync_clr) }, 127 /* PFSYNC_ACT_OINS */ 128 { pfsync_in_error, 0 }, 129 /* PFSYNC_ACT_INS_ACK */ 130 { pfsync_in_iack, sizeof(struct pfsync_ins_ack) }, 131 /* PFSYNC_ACT_OUPD */ 132 { pfsync_in_error, 0 }, 133 /* PFSYNC_ACT_UPD_C */ 134 { pfsync_in_upd_c, sizeof(struct pfsync_upd_c) }, 135 /* PFSYNC_ACT_UPD_REQ */ 136 { pfsync_in_ureq, sizeof(struct pfsync_upd_req) }, 137 /* PFSYNC_ACT_DEL */ 138 { pfsync_in_del, sizeof(struct pfsync_state) }, 139 /* PFSYNC_ACT_DEL_C */ 140 { pfsync_in_del_c, sizeof(struct pfsync_del_c) }, 141 /* PFSYNC_ACT_INS_F */ 142 { pfsync_in_error, 0 }, 143 /* PFSYNC_ACT_DEL_F */ 144 { pfsync_in_error, 0 }, 145 /* PFSYNC_ACT_BUS */ 146 { pfsync_in_bus, sizeof(struct pfsync_bus) }, 147 /* PFSYNC_ACT_OTDB */ 148 { pfsync_in_error, 0 }, 149 /* PFSYNC_ACT_EOF */ 150 { pfsync_in_error, 0 }, 151 /* PFSYNC_ACT_INS */ 152 { pfsync_in_ins, sizeof(struct pfsync_state) }, 153 /* PFSYNC_ACT_UPD */ 154 { pfsync_in_upd, sizeof(struct pfsync_state) }, 155 /* PFSYNC_ACT_TDB */ 156 { pfsync_in_tdb, sizeof(struct pfsync_tdb) }, 157 }; 158 159 struct pfsync_q { 160 void (*write)(struct pf_state *, void *); 161 size_t len; 162 u_int8_t action; 163 }; 164 165 /* we have one of these for every PFSYNC_S_ */ 166 void pfsync_out_state(struct pf_state *, void *); 167 void pfsync_out_iack(struct pf_state *, void *); 168 void pfsync_out_upd_c(struct pf_state *, void *); 169 void pfsync_out_del(struct pf_state *, void *); 170 171 struct pfsync_q pfsync_qs[] = { 172 { pfsync_out_iack, sizeof(struct pfsync_ins_ack), PFSYNC_ACT_INS_ACK }, 173 { pfsync_out_upd_c, sizeof(struct pfsync_upd_c), PFSYNC_ACT_UPD_C }, 174 { pfsync_out_del, sizeof(struct pfsync_del_c), PFSYNC_ACT_DEL_C }, 175 { pfsync_out_state, sizeof(struct pfsync_state), PFSYNC_ACT_INS }, 176 { pfsync_out_state, sizeof(struct pfsync_state), PFSYNC_ACT_UPD } 177 }; 178 179 void pfsync_q_ins(struct pf_state *, int); 180 void pfsync_q_del(struct pf_state *); 181 182 struct pfsync_upd_req_item { 183 TAILQ_ENTRY(pfsync_upd_req_item) ur_entry; 184 TAILQ_ENTRY(pfsync_upd_req_item) ur_snap; 185 struct pfsync_upd_req ur_msg; 186 }; 187 TAILQ_HEAD(pfsync_upd_reqs, pfsync_upd_req_item); 188 189 struct pfsync_deferral { 190 TAILQ_ENTRY(pfsync_deferral) pd_entry; 191 struct pf_state *pd_st; 192 struct mbuf *pd_m; 193 uint64_t pd_deadline; 194 }; 195 TAILQ_HEAD(pfsync_deferrals, pfsync_deferral); 196 197 #define PFSYNC_PLSIZE MAX(sizeof(struct pfsync_upd_req_item), \ 198 sizeof(struct pfsync_deferral)) 199 200 void pfsync_out_tdb(struct tdb *, void *); 201 202 struct pfsync_softc { 203 struct ifnet sc_if; 204 unsigned int sc_sync_ifidx; 205 206 struct pool sc_pool; 207 208 struct ip_moptions sc_imo; 209 210 struct in_addr sc_sync_peer; 211 u_int8_t sc_maxupdates; 212 213 struct ip sc_template; 214 215 struct pf_state_queue sc_qs[PFSYNC_S_COUNT]; 216 struct mutex sc_st_mtx; 217 size_t sc_len; 218 219 struct pfsync_upd_reqs sc_upd_req_list; 220 struct mutex sc_upd_req_mtx; 221 222 int sc_initial_bulk; 223 int sc_link_demoted; 224 225 int sc_defer; 226 struct pfsync_deferrals sc_deferrals; 227 u_int sc_deferred; 228 struct mutex sc_deferrals_mtx; 229 struct timeout sc_deferrals_tmo; 230 231 void *sc_plus; 232 size_t sc_pluslen; 233 234 u_int32_t sc_ureq_sent; 235 int sc_bulk_tries; 236 struct timeout sc_bulkfail_tmo; 237 238 u_int32_t sc_ureq_received; 239 struct pf_state *sc_bulk_next; 240 struct pf_state *sc_bulk_last; 241 struct timeout sc_bulk_tmo; 242 243 TAILQ_HEAD(, tdb) sc_tdb_q; 244 struct mutex sc_tdb_mtx; 245 246 struct task sc_ltask; 247 struct task sc_dtask; 248 249 struct timeout sc_tmo; 250 }; 251 252 struct pfsync_snapshot { 253 struct pfsync_softc *sn_sc; 254 struct pf_state_queue sn_qs[PFSYNC_S_COUNT]; 255 struct pfsync_upd_reqs sn_upd_req_list; 256 TAILQ_HEAD(, tdb) sn_tdb_q; 257 size_t sn_len; 258 void *sn_plus; 259 size_t sn_pluslen; 260 }; 261 262 struct pfsync_softc *pfsyncif = NULL; 263 struct cpumem *pfsynccounters; 264 265 void pfsyncattach(int); 266 int pfsync_clone_create(struct if_clone *, int); 267 int pfsync_clone_destroy(struct ifnet *); 268 void pfsync_update_net_tdb(struct pfsync_tdb *); 269 int pfsyncoutput(struct ifnet *, struct mbuf *, struct sockaddr *, 270 struct rtentry *); 271 int pfsyncioctl(struct ifnet *, u_long, caddr_t); 272 void pfsyncstart(struct ifqueue *); 273 void pfsync_syncdev_state(void *); 274 void pfsync_ifdetach(void *); 275 276 void pfsync_deferred(struct pf_state *, int); 277 void pfsync_undefer(struct pfsync_deferral *, int); 278 void pfsync_deferrals_tmo(void *); 279 280 void pfsync_cancel_full_update(struct pfsync_softc *); 281 void pfsync_request_full_update(struct pfsync_softc *); 282 void pfsync_request_update(u_int32_t, u_int64_t); 283 void pfsync_update_state_req(struct pf_state *); 284 285 void pfsync_drop(struct pfsync_softc *); 286 void pfsync_sendout(void); 287 void pfsync_send_plus(void *, size_t); 288 void pfsync_timeout(void *); 289 void pfsync_tdb_timeout(void *); 290 291 void pfsync_bulk_start(void); 292 void pfsync_bulk_status(u_int8_t); 293 void pfsync_bulk_update(void *); 294 void pfsync_bulk_fail(void *); 295 296 void pfsync_grab_snapshot(struct pfsync_snapshot *, struct pfsync_softc *); 297 void pfsync_drop_snapshot(struct pfsync_snapshot *); 298 299 void pfsync_send_dispatch(void *); 300 void pfsync_send_pkt(struct mbuf *); 301 302 static struct mbuf_queue pfsync_mq; 303 static struct task pfsync_task = 304 TASK_INITIALIZER(pfsync_send_dispatch, &pfsync_mq); 305 306 #define PFSYNC_MAX_BULKTRIES 12 307 int pfsync_sync_ok; 308 309 struct if_clone pfsync_cloner = 310 IF_CLONE_INITIALIZER("pfsync", pfsync_clone_create, pfsync_clone_destroy); 311 312 void 313 pfsyncattach(int npfsync) 314 { 315 if_clone_attach(&pfsync_cloner); 316 pfsynccounters = counters_alloc(pfsyncs_ncounters); 317 mq_init(&pfsync_mq, 4096, IPL_MPFLOOR); 318 } 319 320 int 321 pfsync_clone_create(struct if_clone *ifc, int unit) 322 { 323 struct pfsync_softc *sc; 324 struct ifnet *ifp; 325 int q; 326 327 if (unit != 0) 328 return (EINVAL); 329 330 pfsync_sync_ok = 1; 331 332 sc = malloc(sizeof(*pfsyncif), M_DEVBUF, M_WAITOK|M_ZERO); 333 for (q = 0; q < PFSYNC_S_COUNT; q++) 334 TAILQ_INIT(&sc->sc_qs[q]); 335 mtx_init(&sc->sc_st_mtx, IPL_MPFLOOR); 336 337 pool_init(&sc->sc_pool, PFSYNC_PLSIZE, 0, IPL_MPFLOOR, 0, "pfsync", 338 NULL); 339 TAILQ_INIT(&sc->sc_upd_req_list); 340 mtx_init(&sc->sc_upd_req_mtx, IPL_MPFLOOR); 341 TAILQ_INIT(&sc->sc_deferrals); 342 mtx_init(&sc->sc_deferrals_mtx, IPL_MPFLOOR); 343 timeout_set_proc(&sc->sc_deferrals_tmo, pfsync_deferrals_tmo, sc); 344 task_set(&sc->sc_ltask, pfsync_syncdev_state, sc); 345 task_set(&sc->sc_dtask, pfsync_ifdetach, sc); 346 sc->sc_deferred = 0; 347 348 TAILQ_INIT(&sc->sc_tdb_q); 349 mtx_init(&sc->sc_tdb_mtx, IPL_MPFLOOR); 350 351 sc->sc_len = PFSYNC_MINPKT; 352 sc->sc_maxupdates = 128; 353 354 sc->sc_imo.imo_membership = mallocarray(IP_MIN_MEMBERSHIPS, 355 sizeof(struct in_multi *), M_IPMOPTS, M_WAITOK|M_ZERO); 356 sc->sc_imo.imo_max_memberships = IP_MIN_MEMBERSHIPS; 357 358 ifp = &sc->sc_if; 359 snprintf(ifp->if_xname, sizeof ifp->if_xname, "pfsync%d", unit); 360 ifp->if_softc = sc; 361 ifp->if_ioctl = pfsyncioctl; 362 ifp->if_output = pfsyncoutput; 363 ifp->if_qstart = pfsyncstart; 364 ifp->if_type = IFT_PFSYNC; 365 ifp->if_hdrlen = sizeof(struct pfsync_header); 366 ifp->if_mtu = ETHERMTU; 367 ifp->if_xflags = IFXF_CLONED | IFXF_MPSAFE; 368 timeout_set_proc(&sc->sc_tmo, pfsync_timeout, NULL); 369 timeout_set_proc(&sc->sc_bulk_tmo, pfsync_bulk_update, NULL); 370 timeout_set_proc(&sc->sc_bulkfail_tmo, pfsync_bulk_fail, NULL); 371 372 if_attach(ifp); 373 if_alloc_sadl(ifp); 374 375 #if NCARP > 0 376 if_addgroup(ifp, "carp"); 377 #endif 378 379 #if NBPFILTER > 0 380 bpfattach(&sc->sc_if.if_bpf, ifp, DLT_PFSYNC, PFSYNC_HDRLEN); 381 #endif 382 383 pfsyncif = sc; 384 385 return (0); 386 } 387 388 int 389 pfsync_clone_destroy(struct ifnet *ifp) 390 { 391 struct pfsync_softc *sc = ifp->if_softc; 392 struct ifnet *ifp0; 393 struct pfsync_deferral *pd; 394 struct pfsync_deferrals deferrals; 395 396 NET_LOCK(); 397 398 #if NCARP > 0 399 if (!pfsync_sync_ok) 400 carp_group_demote_adj(&sc->sc_if, -1, "pfsync destroy"); 401 if (sc->sc_link_demoted) 402 carp_group_demote_adj(&sc->sc_if, -1, "pfsync destroy"); 403 #endif 404 if ((ifp0 = if_get(sc->sc_sync_ifidx)) != NULL) { 405 if_linkstatehook_del(ifp0, &sc->sc_ltask); 406 if_detachhook_del(ifp0, &sc->sc_dtask); 407 } 408 if_put(ifp0); 409 410 /* XXXSMP breaks atomicity */ 411 NET_UNLOCK(); 412 if_detach(ifp); 413 NET_LOCK(); 414 415 pfsync_drop(sc); 416 417 if (sc->sc_deferred > 0) { 418 TAILQ_INIT(&deferrals); 419 mtx_enter(&sc->sc_deferrals_mtx); 420 TAILQ_CONCAT(&deferrals, &sc->sc_deferrals, pd_entry); 421 sc->sc_deferred = 0; 422 mtx_leave(&sc->sc_deferrals_mtx); 423 424 while ((pd = TAILQ_FIRST(&deferrals)) != NULL) { 425 TAILQ_REMOVE(&deferrals, pd, pd_entry); 426 pfsync_undefer(pd, 0); 427 } 428 } 429 430 pfsyncif = NULL; 431 timeout_del(&sc->sc_bulkfail_tmo); 432 timeout_del(&sc->sc_bulk_tmo); 433 timeout_del(&sc->sc_tmo); 434 435 NET_UNLOCK(); 436 437 pool_destroy(&sc->sc_pool); 438 free(sc->sc_imo.imo_membership, M_IPMOPTS, 439 sc->sc_imo.imo_max_memberships * sizeof(struct in_multi *)); 440 free(sc, M_DEVBUF, sizeof(*sc)); 441 442 return (0); 443 } 444 445 /* 446 * Start output on the pfsync interface. 447 */ 448 void 449 pfsyncstart(struct ifqueue *ifq) 450 { 451 ifq_purge(ifq); 452 } 453 454 void 455 pfsync_syncdev_state(void *arg) 456 { 457 struct pfsync_softc *sc = arg; 458 struct ifnet *ifp; 459 460 if ((sc->sc_if.if_flags & IFF_UP) == 0) 461 return; 462 if ((ifp = if_get(sc->sc_sync_ifidx)) == NULL) 463 return; 464 465 if (ifp->if_link_state == LINK_STATE_DOWN) { 466 sc->sc_if.if_flags &= ~IFF_RUNNING; 467 if (!sc->sc_link_demoted) { 468 #if NCARP > 0 469 carp_group_demote_adj(&sc->sc_if, 1, 470 "pfsync link state down"); 471 #endif 472 sc->sc_link_demoted = 1; 473 } 474 475 /* drop everything */ 476 timeout_del(&sc->sc_tmo); 477 pfsync_drop(sc); 478 479 pfsync_cancel_full_update(sc); 480 } else if (sc->sc_link_demoted) { 481 sc->sc_if.if_flags |= IFF_RUNNING; 482 483 pfsync_request_full_update(sc); 484 } 485 486 if_put(ifp); 487 } 488 489 void 490 pfsync_ifdetach(void *arg) 491 { 492 struct pfsync_softc *sc = arg; 493 struct ifnet *ifp; 494 495 if ((ifp = if_get(sc->sc_sync_ifidx)) != NULL) { 496 if_linkstatehook_del(ifp, &sc->sc_ltask); 497 if_detachhook_del(ifp, &sc->sc_dtask); 498 } 499 if_put(ifp); 500 501 sc->sc_sync_ifidx = 0; 502 } 503 504 int 505 pfsync_input(struct mbuf **mp, int *offp, int proto, int af) 506 { 507 struct mbuf *n, *m = *mp; 508 struct pfsync_softc *sc = pfsyncif; 509 struct ip *ip = mtod(m, struct ip *); 510 struct pfsync_header *ph; 511 struct pfsync_subheader subh; 512 int offset, noff, len, count, mlen, flags = 0; 513 int e; 514 515 NET_ASSERT_LOCKED(); 516 517 pfsyncstat_inc(pfsyncs_ipackets); 518 519 /* verify that we have a sync interface configured */ 520 if (sc == NULL || !ISSET(sc->sc_if.if_flags, IFF_RUNNING) || 521 sc->sc_sync_ifidx == 0 || !pf_status.running) 522 goto done; 523 524 /* verify that the packet came in on the right interface */ 525 if (sc->sc_sync_ifidx != m->m_pkthdr.ph_ifidx) { 526 pfsyncstat_inc(pfsyncs_badif); 527 goto done; 528 } 529 530 sc->sc_if.if_ipackets++; 531 sc->sc_if.if_ibytes += m->m_pkthdr.len; 532 533 /* verify that the IP TTL is 255. */ 534 if (ip->ip_ttl != PFSYNC_DFLTTL) { 535 pfsyncstat_inc(pfsyncs_badttl); 536 goto done; 537 } 538 539 offset = ip->ip_hl << 2; 540 n = m_pulldown(m, offset, sizeof(*ph), &noff); 541 if (n == NULL) { 542 pfsyncstat_inc(pfsyncs_hdrops); 543 return IPPROTO_DONE; 544 } 545 ph = (struct pfsync_header *)(n->m_data + noff); 546 547 /* verify the version */ 548 if (ph->version != PFSYNC_VERSION) { 549 pfsyncstat_inc(pfsyncs_badver); 550 goto done; 551 } 552 len = ntohs(ph->len) + offset; 553 if (m->m_pkthdr.len < len) { 554 pfsyncstat_inc(pfsyncs_badlen); 555 goto done; 556 } 557 558 if (!bcmp(&ph->pfcksum, &pf_status.pf_chksum, PF_MD5_DIGEST_LENGTH)) 559 flags = PFSYNC_SI_CKSUM; 560 561 offset += sizeof(*ph); 562 while (offset <= len - sizeof(subh)) { 563 m_copydata(m, offset, sizeof(subh), &subh); 564 offset += sizeof(subh); 565 566 mlen = subh.len << 2; 567 count = ntohs(subh.count); 568 569 if (subh.action >= PFSYNC_ACT_MAX || 570 subh.action >= nitems(pfsync_acts) || 571 mlen < pfsync_acts[subh.action].len) { 572 /* 573 * subheaders are always followed by at least one 574 * message, so if the peer is new 575 * enough to tell us how big its messages are then we 576 * know enough to skip them. 577 */ 578 if (count > 0 && mlen > 0) { 579 offset += count * mlen; 580 continue; 581 } 582 pfsyncstat_inc(pfsyncs_badact); 583 goto done; 584 } 585 586 n = m_pulldown(m, offset, mlen * count, &noff); 587 if (n == NULL) { 588 pfsyncstat_inc(pfsyncs_badlen); 589 return IPPROTO_DONE; 590 } 591 592 e = pfsync_acts[subh.action].in(n->m_data + noff, mlen, count, 593 flags); 594 if (e != 0) 595 goto done; 596 597 offset += mlen * count; 598 } 599 600 done: 601 m_freem(m); 602 return IPPROTO_DONE; 603 } 604 605 int 606 pfsync_in_clr(caddr_t buf, int len, int count, int flags) 607 { 608 struct pfsync_clr *clr; 609 struct pf_state *st, *nexts; 610 struct pfi_kif *kif; 611 u_int32_t creatorid; 612 int i; 613 614 PF_LOCK(); 615 for (i = 0; i < count; i++) { 616 clr = (struct pfsync_clr *)buf + len * i; 617 kif = NULL; 618 creatorid = clr->creatorid; 619 if (strlen(clr->ifname) && 620 (kif = pfi_kif_find(clr->ifname)) == NULL) 621 continue; 622 623 PF_STATE_ENTER_WRITE(); 624 RBT_FOREACH_SAFE(st, pf_state_tree_id, &tree_id, nexts) { 625 if (st->creatorid == creatorid && 626 ((kif && st->kif == kif) || !kif)) { 627 SET(st->state_flags, PFSTATE_NOSYNC); 628 pf_remove_state(st); 629 } 630 } 631 PF_STATE_EXIT_WRITE(); 632 } 633 PF_UNLOCK(); 634 635 return (0); 636 } 637 638 int 639 pfsync_in_ins(caddr_t buf, int len, int count, int flags) 640 { 641 struct pfsync_state *sp; 642 sa_family_t af1, af2; 643 int i; 644 645 PF_LOCK(); 646 for (i = 0; i < count; i++) { 647 sp = (struct pfsync_state *)(buf + len * i); 648 af1 = sp->key[0].af; 649 af2 = sp->key[1].af; 650 651 /* check for invalid values */ 652 if (sp->timeout >= PFTM_MAX || 653 sp->src.state > PF_TCPS_PROXY_DST || 654 sp->dst.state > PF_TCPS_PROXY_DST || 655 sp->direction > PF_OUT || 656 (((af1 || af2) && 657 ((af1 != AF_INET && af1 != AF_INET6) || 658 (af2 != AF_INET && af2 != AF_INET6))) || 659 (sp->af != AF_INET && sp->af != AF_INET6))) { 660 DPFPRINTF(LOG_NOTICE, 661 "pfsync_input: PFSYNC5_ACT_INS: invalid value"); 662 pfsyncstat_inc(pfsyncs_badval); 663 continue; 664 } 665 666 if (pf_state_import(sp, flags) == ENOMEM) { 667 /* drop out, but process the rest of the actions */ 668 break; 669 } 670 } 671 PF_UNLOCK(); 672 673 return (0); 674 } 675 676 int 677 pfsync_in_iack(caddr_t buf, int len, int count, int flags) 678 { 679 struct pfsync_ins_ack *ia; 680 struct pf_state_cmp id_key; 681 struct pf_state *st; 682 int i; 683 684 for (i = 0; i < count; i++) { 685 ia = (struct pfsync_ins_ack *)(buf + len * i); 686 687 id_key.id = ia->id; 688 id_key.creatorid = ia->creatorid; 689 690 PF_STATE_ENTER_READ(); 691 st = pf_find_state_byid(&id_key); 692 pf_state_ref(st); 693 PF_STATE_EXIT_READ(); 694 if (st == NULL) 695 continue; 696 697 if (ISSET(st->state_flags, PFSTATE_ACK)) 698 pfsync_deferred(st, 0); 699 700 pf_state_unref(st); 701 } 702 703 return (0); 704 } 705 706 int 707 pfsync_upd_tcp(struct pf_state *st, struct pfsync_state_peer *src, 708 struct pfsync_state_peer *dst) 709 { 710 int sync = 0; 711 712 /* 713 * The state should never go backwards except 714 * for syn-proxy states. Neither should the 715 * sequence window slide backwards. 716 */ 717 if ((st->src.state > src->state && 718 (st->src.state < PF_TCPS_PROXY_SRC || 719 src->state >= PF_TCPS_PROXY_SRC)) || 720 721 (st->src.state == src->state && 722 SEQ_GT(st->src.seqlo, ntohl(src->seqlo)))) 723 sync++; 724 else 725 pf_state_peer_ntoh(src, &st->src); 726 727 if ((st->dst.state > dst->state) || 728 729 (st->dst.state >= TCPS_SYN_SENT && 730 SEQ_GT(st->dst.seqlo, ntohl(dst->seqlo)))) 731 sync++; 732 else 733 pf_state_peer_ntoh(dst, &st->dst); 734 735 return (sync); 736 } 737 738 int 739 pfsync_in_upd(caddr_t buf, int len, int count, int flags) 740 { 741 struct pfsync_state *sp; 742 struct pf_state_cmp id_key; 743 struct pf_state *st; 744 int sync, error; 745 int i; 746 747 for (i = 0; i < count; i++) { 748 sp = (struct pfsync_state *)(buf + len * i); 749 750 /* check for invalid values */ 751 if (sp->timeout >= PFTM_MAX || 752 sp->src.state > PF_TCPS_PROXY_DST || 753 sp->dst.state > PF_TCPS_PROXY_DST) { 754 DPFPRINTF(LOG_NOTICE, 755 "pfsync_input: PFSYNC_ACT_UPD: invalid value"); 756 pfsyncstat_inc(pfsyncs_badval); 757 continue; 758 } 759 760 id_key.id = sp->id; 761 id_key.creatorid = sp->creatorid; 762 763 PF_STATE_ENTER_READ(); 764 st = pf_find_state_byid(&id_key); 765 pf_state_ref(st); 766 PF_STATE_EXIT_READ(); 767 if (st == NULL) { 768 /* insert the update */ 769 PF_LOCK(); 770 error = pf_state_import(sp, flags); 771 if (error) 772 pfsyncstat_inc(pfsyncs_badstate); 773 PF_UNLOCK(); 774 continue; 775 } 776 777 if (ISSET(st->state_flags, PFSTATE_ACK)) 778 pfsync_deferred(st, 1); 779 780 if (st->key[PF_SK_WIRE]->proto == IPPROTO_TCP) 781 sync = pfsync_upd_tcp(st, &sp->src, &sp->dst); 782 else { 783 sync = 0; 784 785 /* 786 * Non-TCP protocol state machine always go 787 * forwards 788 */ 789 if (st->src.state > sp->src.state) 790 sync++; 791 else 792 pf_state_peer_ntoh(&sp->src, &st->src); 793 794 if (st->dst.state > sp->dst.state) 795 sync++; 796 else 797 pf_state_peer_ntoh(&sp->dst, &st->dst); 798 } 799 800 if (sync < 2) { 801 pf_state_alloc_scrub_memory(&sp->dst, &st->dst); 802 pf_state_peer_ntoh(&sp->dst, &st->dst); 803 st->expire = getuptime(); 804 st->timeout = sp->timeout; 805 } 806 st->pfsync_time = getuptime(); 807 808 if (sync) { 809 pfsyncstat_inc(pfsyncs_stale); 810 811 pfsync_update_state(st); 812 schednetisr(NETISR_PFSYNC); 813 } 814 815 pf_state_unref(st); 816 } 817 818 return (0); 819 } 820 821 int 822 pfsync_in_upd_c(caddr_t buf, int len, int count, int flags) 823 { 824 struct pfsync_upd_c *up; 825 struct pf_state_cmp id_key; 826 struct pf_state *st; 827 828 int sync; 829 830 int i; 831 832 for (i = 0; i < count; i++) { 833 up = (struct pfsync_upd_c *)(buf + len * i); 834 835 /* check for invalid values */ 836 if (up->timeout >= PFTM_MAX || 837 up->src.state > PF_TCPS_PROXY_DST || 838 up->dst.state > PF_TCPS_PROXY_DST) { 839 DPFPRINTF(LOG_NOTICE, 840 "pfsync_input: PFSYNC_ACT_UPD_C: invalid value"); 841 pfsyncstat_inc(pfsyncs_badval); 842 continue; 843 } 844 845 id_key.id = up->id; 846 id_key.creatorid = up->creatorid; 847 848 PF_STATE_ENTER_READ(); 849 st = pf_find_state_byid(&id_key); 850 pf_state_ref(st); 851 PF_STATE_EXIT_READ(); 852 if (st == NULL) { 853 /* We don't have this state. Ask for it. */ 854 pfsync_request_update(id_key.creatorid, id_key.id); 855 continue; 856 } 857 858 if (ISSET(st->state_flags, PFSTATE_ACK)) 859 pfsync_deferred(st, 1); 860 861 if (st->key[PF_SK_WIRE]->proto == IPPROTO_TCP) 862 sync = pfsync_upd_tcp(st, &up->src, &up->dst); 863 else { 864 sync = 0; 865 /* 866 * Non-TCP protocol state machine always go 867 * forwards 868 */ 869 if (st->src.state > up->src.state) 870 sync++; 871 else 872 pf_state_peer_ntoh(&up->src, &st->src); 873 874 if (st->dst.state > up->dst.state) 875 sync++; 876 else 877 pf_state_peer_ntoh(&up->dst, &st->dst); 878 } 879 if (sync < 2) { 880 pf_state_alloc_scrub_memory(&up->dst, &st->dst); 881 pf_state_peer_ntoh(&up->dst, &st->dst); 882 st->expire = getuptime(); 883 st->timeout = up->timeout; 884 } 885 st->pfsync_time = getuptime(); 886 887 if (sync) { 888 pfsyncstat_inc(pfsyncs_stale); 889 890 pfsync_update_state(st); 891 schednetisr(NETISR_PFSYNC); 892 } 893 894 pf_state_unref(st); 895 } 896 897 return (0); 898 } 899 900 int 901 pfsync_in_ureq(caddr_t buf, int len, int count, int flags) 902 { 903 struct pfsync_upd_req *ur; 904 int i; 905 906 struct pf_state_cmp id_key; 907 struct pf_state *st; 908 909 for (i = 0; i < count; i++) { 910 ur = (struct pfsync_upd_req *)(buf + len * i); 911 912 id_key.id = ur->id; 913 id_key.creatorid = ur->creatorid; 914 915 if (id_key.id == 0 && id_key.creatorid == 0) 916 pfsync_bulk_start(); 917 else { 918 PF_STATE_ENTER_READ(); 919 st = pf_find_state_byid(&id_key); 920 pf_state_ref(st); 921 PF_STATE_EXIT_READ(); 922 if (st == NULL) { 923 pfsyncstat_inc(pfsyncs_badstate); 924 continue; 925 } 926 if (ISSET(st->state_flags, PFSTATE_NOSYNC)) { 927 pf_state_unref(st); 928 continue; 929 } 930 931 pfsync_update_state_req(st); 932 pf_state_unref(st); 933 } 934 } 935 936 return (0); 937 } 938 939 int 940 pfsync_in_del(caddr_t buf, int len, int count, int flags) 941 { 942 struct pfsync_state *sp; 943 struct pf_state_cmp id_key; 944 struct pf_state *st; 945 int i; 946 947 PF_STATE_ENTER_WRITE(); 948 for (i = 0; i < count; i++) { 949 sp = (struct pfsync_state *)(buf + len * i); 950 951 id_key.id = sp->id; 952 id_key.creatorid = sp->creatorid; 953 954 st = pf_find_state_byid(&id_key); 955 if (st == NULL) { 956 pfsyncstat_inc(pfsyncs_badstate); 957 continue; 958 } 959 SET(st->state_flags, PFSTATE_NOSYNC); 960 pf_remove_state(st); 961 } 962 PF_STATE_EXIT_WRITE(); 963 964 return (0); 965 } 966 967 int 968 pfsync_in_del_c(caddr_t buf, int len, int count, int flags) 969 { 970 struct pfsync_del_c *sp; 971 struct pf_state_cmp id_key; 972 struct pf_state *st; 973 int i; 974 975 PF_LOCK(); 976 PF_STATE_ENTER_WRITE(); 977 for (i = 0; i < count; i++) { 978 sp = (struct pfsync_del_c *)(buf + len * i); 979 980 id_key.id = sp->id; 981 id_key.creatorid = sp->creatorid; 982 983 st = pf_find_state_byid(&id_key); 984 if (st == NULL) { 985 pfsyncstat_inc(pfsyncs_badstate); 986 continue; 987 } 988 989 SET(st->state_flags, PFSTATE_NOSYNC); 990 pf_remove_state(st); 991 } 992 PF_STATE_EXIT_WRITE(); 993 PF_UNLOCK(); 994 995 return (0); 996 } 997 998 int 999 pfsync_in_bus(caddr_t buf, int len, int count, int flags) 1000 { 1001 struct pfsync_softc *sc = pfsyncif; 1002 struct pfsync_bus *bus; 1003 1004 /* If we're not waiting for a bulk update, who cares. */ 1005 if (sc->sc_ureq_sent == 0) 1006 return (0); 1007 1008 bus = (struct pfsync_bus *)buf; 1009 1010 switch (bus->status) { 1011 case PFSYNC_BUS_START: 1012 timeout_add(&sc->sc_bulkfail_tmo, 4 * hz + 1013 pf_pool_limits[PF_LIMIT_STATES].limit / 1014 ((sc->sc_if.if_mtu - PFSYNC_MINPKT) / 1015 sizeof(struct pfsync_state))); 1016 DPFPRINTF(LOG_INFO, "received bulk update start"); 1017 break; 1018 1019 case PFSYNC_BUS_END: 1020 if (getuptime() - ntohl(bus->endtime) >= 1021 sc->sc_ureq_sent) { 1022 /* that's it, we're happy */ 1023 sc->sc_ureq_sent = 0; 1024 sc->sc_bulk_tries = 0; 1025 timeout_del(&sc->sc_bulkfail_tmo); 1026 #if NCARP > 0 1027 if (!pfsync_sync_ok) 1028 carp_group_demote_adj(&sc->sc_if, -1, 1029 sc->sc_link_demoted ? 1030 "pfsync link state up" : 1031 "pfsync bulk done"); 1032 if (sc->sc_initial_bulk) { 1033 carp_group_demote_adj(&sc->sc_if, -32, 1034 "pfsync init"); 1035 sc->sc_initial_bulk = 0; 1036 } 1037 #endif 1038 pfsync_sync_ok = 1; 1039 sc->sc_link_demoted = 0; 1040 DPFPRINTF(LOG_INFO, "received valid bulk update end"); 1041 } else { 1042 DPFPRINTF(LOG_WARNING, "received invalid " 1043 "bulk update end: bad timestamp"); 1044 } 1045 break; 1046 } 1047 1048 return (0); 1049 } 1050 1051 int 1052 pfsync_in_tdb(caddr_t buf, int len, int count, int flags) 1053 { 1054 #if defined(IPSEC) 1055 struct pfsync_tdb *tp; 1056 int i; 1057 1058 for (i = 0; i < count; i++) { 1059 tp = (struct pfsync_tdb *)(buf + len * i); 1060 pfsync_update_net_tdb(tp); 1061 } 1062 #endif 1063 1064 return (0); 1065 } 1066 1067 #if defined(IPSEC) 1068 /* Update an in-kernel tdb. Silently fail if no tdb is found. */ 1069 void 1070 pfsync_update_net_tdb(struct pfsync_tdb *pt) 1071 { 1072 struct tdb *tdb; 1073 1074 NET_ASSERT_LOCKED(); 1075 1076 /* check for invalid values */ 1077 if (ntohl(pt->spi) <= SPI_RESERVED_MAX || 1078 (pt->dst.sa.sa_family != AF_INET && 1079 pt->dst.sa.sa_family != AF_INET6)) 1080 goto bad; 1081 1082 tdb = gettdb(ntohs(pt->rdomain), pt->spi, 1083 (union sockaddr_union *)&pt->dst, pt->sproto); 1084 if (tdb) { 1085 pt->rpl = betoh64(pt->rpl); 1086 pt->cur_bytes = betoh64(pt->cur_bytes); 1087 1088 /* Neither replay nor byte counter should ever decrease. */ 1089 if (pt->rpl < tdb->tdb_rpl || 1090 pt->cur_bytes < tdb->tdb_cur_bytes) { 1091 tdb_unref(tdb); 1092 goto bad; 1093 } 1094 1095 tdb->tdb_rpl = pt->rpl; 1096 tdb->tdb_cur_bytes = pt->cur_bytes; 1097 tdb_unref(tdb); 1098 } 1099 return; 1100 1101 bad: 1102 DPFPRINTF(LOG_WARNING, "pfsync_insert: PFSYNC_ACT_TDB_UPD: " 1103 "invalid value"); 1104 pfsyncstat_inc(pfsyncs_badstate); 1105 return; 1106 } 1107 #endif 1108 1109 1110 int 1111 pfsync_in_eof(caddr_t buf, int len, int count, int flags) 1112 { 1113 if (len > 0 || count > 0) 1114 pfsyncstat_inc(pfsyncs_badact); 1115 1116 /* we're done. let the caller return */ 1117 return (1); 1118 } 1119 1120 int 1121 pfsync_in_error(caddr_t buf, int len, int count, int flags) 1122 { 1123 pfsyncstat_inc(pfsyncs_badact); 1124 return (-1); 1125 } 1126 1127 int 1128 pfsyncoutput(struct ifnet *ifp, struct mbuf *m, struct sockaddr *dst, 1129 struct rtentry *rt) 1130 { 1131 m_freem(m); /* drop packet */ 1132 return (EAFNOSUPPORT); 1133 } 1134 1135 int 1136 pfsyncioctl(struct ifnet *ifp, u_long cmd, caddr_t data) 1137 { 1138 struct proc *p = curproc; 1139 struct pfsync_softc *sc = ifp->if_softc; 1140 struct ifreq *ifr = (struct ifreq *)data; 1141 struct ip_moptions *imo = &sc->sc_imo; 1142 struct pfsyncreq pfsyncr; 1143 struct ifnet *ifp0, *sifp; 1144 struct ip *ip; 1145 int error; 1146 1147 switch (cmd) { 1148 case SIOCSIFFLAGS: 1149 if ((ifp->if_flags & IFF_RUNNING) == 0 && 1150 (ifp->if_flags & IFF_UP)) { 1151 ifp->if_flags |= IFF_RUNNING; 1152 1153 #if NCARP > 0 1154 sc->sc_initial_bulk = 1; 1155 carp_group_demote_adj(&sc->sc_if, 32, "pfsync init"); 1156 #endif 1157 1158 pfsync_request_full_update(sc); 1159 } 1160 if ((ifp->if_flags & IFF_RUNNING) && 1161 (ifp->if_flags & IFF_UP) == 0) { 1162 ifp->if_flags &= ~IFF_RUNNING; 1163 1164 /* drop everything */ 1165 timeout_del(&sc->sc_tmo); 1166 pfsync_drop(sc); 1167 1168 pfsync_cancel_full_update(sc); 1169 } 1170 break; 1171 case SIOCSIFMTU: 1172 if ((ifp0 = if_get(sc->sc_sync_ifidx)) == NULL) 1173 return (EINVAL); 1174 error = 0; 1175 if (ifr->ifr_mtu <= PFSYNC_MINPKT || 1176 ifr->ifr_mtu > ifp0->if_mtu) { 1177 error = EINVAL; 1178 } 1179 if_put(ifp0); 1180 if (error) 1181 return error; 1182 if (ifr->ifr_mtu < ifp->if_mtu) 1183 pfsync_sendout(); 1184 ifp->if_mtu = ifr->ifr_mtu; 1185 break; 1186 case SIOCGETPFSYNC: 1187 bzero(&pfsyncr, sizeof(pfsyncr)); 1188 if ((ifp0 = if_get(sc->sc_sync_ifidx)) != NULL) { 1189 strlcpy(pfsyncr.pfsyncr_syncdev, 1190 ifp0->if_xname, IFNAMSIZ); 1191 } 1192 if_put(ifp0); 1193 pfsyncr.pfsyncr_syncpeer = sc->sc_sync_peer; 1194 pfsyncr.pfsyncr_maxupdates = sc->sc_maxupdates; 1195 pfsyncr.pfsyncr_defer = sc->sc_defer; 1196 return (copyout(&pfsyncr, ifr->ifr_data, sizeof(pfsyncr))); 1197 1198 case SIOCSETPFSYNC: 1199 if ((error = suser(p)) != 0) 1200 return (error); 1201 if ((error = copyin(ifr->ifr_data, &pfsyncr, sizeof(pfsyncr)))) 1202 return (error); 1203 1204 if (pfsyncr.pfsyncr_syncpeer.s_addr == 0) 1205 sc->sc_sync_peer.s_addr = INADDR_PFSYNC_GROUP; 1206 else 1207 sc->sc_sync_peer.s_addr = 1208 pfsyncr.pfsyncr_syncpeer.s_addr; 1209 1210 if (pfsyncr.pfsyncr_maxupdates > 255) 1211 return (EINVAL); 1212 sc->sc_maxupdates = pfsyncr.pfsyncr_maxupdates; 1213 1214 sc->sc_defer = pfsyncr.pfsyncr_defer; 1215 1216 if (pfsyncr.pfsyncr_syncdev[0] == 0) { 1217 if ((ifp0 = if_get(sc->sc_sync_ifidx)) != NULL) { 1218 if_linkstatehook_del(ifp0, &sc->sc_ltask); 1219 if_detachhook_del(ifp0, &sc->sc_dtask); 1220 } 1221 if_put(ifp0); 1222 sc->sc_sync_ifidx = 0; 1223 if (imo->imo_num_memberships > 0) { 1224 in_delmulti(imo->imo_membership[ 1225 --imo->imo_num_memberships]); 1226 imo->imo_ifidx = 0; 1227 } 1228 break; 1229 } 1230 1231 if ((sifp = if_unit(pfsyncr.pfsyncr_syncdev)) == NULL) 1232 return (EINVAL); 1233 1234 ifp0 = if_get(sc->sc_sync_ifidx); 1235 1236 if (sifp->if_mtu < sc->sc_if.if_mtu || (ifp0 != NULL && 1237 sifp->if_mtu < ifp0->if_mtu) || 1238 sifp->if_mtu < MCLBYTES - sizeof(struct ip)) 1239 pfsync_sendout(); 1240 1241 if (ifp0) { 1242 if_linkstatehook_del(ifp0, &sc->sc_ltask); 1243 if_detachhook_del(ifp0, &sc->sc_dtask); 1244 } 1245 if_put(ifp0); 1246 sc->sc_sync_ifidx = sifp->if_index; 1247 1248 if (imo->imo_num_memberships > 0) { 1249 in_delmulti(imo->imo_membership[--imo->imo_num_memberships]); 1250 imo->imo_ifidx = 0; 1251 } 1252 1253 if (sc->sc_sync_peer.s_addr == INADDR_PFSYNC_GROUP) { 1254 struct in_addr addr; 1255 1256 if (!(sifp->if_flags & IFF_MULTICAST)) { 1257 sc->sc_sync_ifidx = 0; 1258 if_put(sifp); 1259 return (EADDRNOTAVAIL); 1260 } 1261 1262 addr.s_addr = INADDR_PFSYNC_GROUP; 1263 1264 if ((imo->imo_membership[0] = 1265 in_addmulti(&addr, sifp)) == NULL) { 1266 sc->sc_sync_ifidx = 0; 1267 if_put(sifp); 1268 return (ENOBUFS); 1269 } 1270 imo->imo_num_memberships++; 1271 imo->imo_ifidx = sc->sc_sync_ifidx; 1272 imo->imo_ttl = PFSYNC_DFLTTL; 1273 imo->imo_loop = 0; 1274 } 1275 1276 ip = &sc->sc_template; 1277 bzero(ip, sizeof(*ip)); 1278 ip->ip_v = IPVERSION; 1279 ip->ip_hl = sizeof(sc->sc_template) >> 2; 1280 ip->ip_tos = IPTOS_LOWDELAY; 1281 /* len and id are set later */ 1282 ip->ip_off = htons(IP_DF); 1283 ip->ip_ttl = PFSYNC_DFLTTL; 1284 ip->ip_p = IPPROTO_PFSYNC; 1285 ip->ip_src.s_addr = INADDR_ANY; 1286 ip->ip_dst.s_addr = sc->sc_sync_peer.s_addr; 1287 1288 if_linkstatehook_add(sifp, &sc->sc_ltask); 1289 if_detachhook_add(sifp, &sc->sc_dtask); 1290 if_put(sifp); 1291 1292 pfsync_request_full_update(sc); 1293 1294 break; 1295 1296 default: 1297 return (ENOTTY); 1298 } 1299 1300 return (0); 1301 } 1302 1303 void 1304 pfsync_out_state(struct pf_state *st, void *buf) 1305 { 1306 struct pfsync_state *sp = buf; 1307 1308 pf_state_export(sp, st); 1309 } 1310 1311 void 1312 pfsync_out_iack(struct pf_state *st, void *buf) 1313 { 1314 struct pfsync_ins_ack *iack = buf; 1315 1316 iack->id = st->id; 1317 iack->creatorid = st->creatorid; 1318 } 1319 1320 void 1321 pfsync_out_upd_c(struct pf_state *st, void *buf) 1322 { 1323 struct pfsync_upd_c *up = buf; 1324 1325 bzero(up, sizeof(*up)); 1326 up->id = st->id; 1327 pf_state_peer_hton(&st->src, &up->src); 1328 pf_state_peer_hton(&st->dst, &up->dst); 1329 up->creatorid = st->creatorid; 1330 up->timeout = st->timeout; 1331 } 1332 1333 void 1334 pfsync_out_del(struct pf_state *st, void *buf) 1335 { 1336 struct pfsync_del_c *dp = buf; 1337 1338 dp->id = st->id; 1339 dp->creatorid = st->creatorid; 1340 1341 SET(st->state_flags, PFSTATE_NOSYNC); 1342 } 1343 1344 void 1345 pfsync_grab_snapshot(struct pfsync_snapshot *sn, struct pfsync_softc *sc) 1346 { 1347 int q; 1348 struct pf_state *st; 1349 struct pfsync_upd_req_item *ur; 1350 #if defined(IPSEC) 1351 struct tdb *tdb; 1352 #endif 1353 1354 sn->sn_sc = sc; 1355 1356 mtx_enter(&sc->sc_st_mtx); 1357 mtx_enter(&sc->sc_upd_req_mtx); 1358 mtx_enter(&sc->sc_tdb_mtx); 1359 1360 for (q = 0; q < PFSYNC_S_COUNT; q++) { 1361 TAILQ_INIT(&sn->sn_qs[q]); 1362 1363 while ((st = TAILQ_FIRST(&sc->sc_qs[q])) != NULL) { 1364 TAILQ_REMOVE(&sc->sc_qs[q], st, sync_list); 1365 mtx_enter(&st->mtx); 1366 if (st->snapped == 0) { 1367 TAILQ_INSERT_TAIL(&sn->sn_qs[q], st, sync_snap); 1368 st->snapped = 1; 1369 mtx_leave(&st->mtx); 1370 } else { 1371 /* 1372 * item is on snapshot list already, so we can 1373 * skip it now. 1374 */ 1375 mtx_leave(&st->mtx); 1376 pf_state_unref(st); 1377 } 1378 } 1379 } 1380 1381 TAILQ_INIT(&sn->sn_upd_req_list); 1382 while ((ur = TAILQ_FIRST(&sc->sc_upd_req_list)) != NULL) { 1383 TAILQ_REMOVE(&sc->sc_upd_req_list, ur, ur_entry); 1384 TAILQ_INSERT_TAIL(&sn->sn_upd_req_list, ur, ur_snap); 1385 } 1386 1387 TAILQ_INIT(&sn->sn_tdb_q); 1388 #if defined(IPSEC) 1389 while ((tdb = TAILQ_FIRST(&sc->sc_tdb_q)) != NULL) { 1390 TAILQ_REMOVE(&sc->sc_tdb_q, tdb, tdb_sync_entry); 1391 TAILQ_INSERT_TAIL(&sn->sn_tdb_q, tdb, tdb_sync_snap); 1392 1393 mtx_enter(&tdb->tdb_mtx); 1394 KASSERT(!ISSET(tdb->tdb_flags, TDBF_PFSYNC_SNAPPED)); 1395 SET(tdb->tdb_flags, TDBF_PFSYNC_SNAPPED); 1396 mtx_leave(&tdb->tdb_mtx); 1397 } 1398 #endif 1399 1400 sn->sn_len = sc->sc_len; 1401 sc->sc_len = PFSYNC_MINPKT; 1402 1403 sn->sn_plus = sc->sc_plus; 1404 sc->sc_plus = NULL; 1405 sn->sn_pluslen = sc->sc_pluslen; 1406 sc->sc_pluslen = 0; 1407 1408 mtx_leave(&sc->sc_tdb_mtx); 1409 mtx_leave(&sc->sc_upd_req_mtx); 1410 mtx_leave(&sc->sc_st_mtx); 1411 } 1412 1413 void 1414 pfsync_drop_snapshot(struct pfsync_snapshot *sn) 1415 { 1416 struct pf_state *st; 1417 struct pfsync_upd_req_item *ur; 1418 #if defined(IPSEC) 1419 struct tdb *t; 1420 #endif 1421 int q; 1422 1423 for (q = 0; q < PFSYNC_S_COUNT; q++) { 1424 if (TAILQ_EMPTY(&sn->sn_qs[q])) 1425 continue; 1426 1427 while ((st = TAILQ_FIRST(&sn->sn_qs[q])) != NULL) { 1428 mtx_enter(&st->mtx); 1429 KASSERT(st->sync_state == q); 1430 KASSERT(st->snapped == 1); 1431 TAILQ_REMOVE(&sn->sn_qs[q], st, sync_snap); 1432 st->sync_state = PFSYNC_S_NONE; 1433 st->snapped = 0; 1434 mtx_leave(&st->mtx); 1435 pf_state_unref(st); 1436 } 1437 } 1438 1439 while ((ur = TAILQ_FIRST(&sn->sn_upd_req_list)) != NULL) { 1440 TAILQ_REMOVE(&sn->sn_upd_req_list, ur, ur_snap); 1441 pool_put(&sn->sn_sc->sc_pool, ur); 1442 } 1443 1444 #if defined(IPSEC) 1445 while ((t = TAILQ_FIRST(&sn->sn_tdb_q)) != NULL) { 1446 TAILQ_REMOVE(&sn->sn_tdb_q, t, tdb_sync_snap); 1447 mtx_enter(&t->tdb_mtx); 1448 KASSERT(ISSET(t->tdb_flags, TDBF_PFSYNC_SNAPPED)); 1449 CLR(t->tdb_flags, TDBF_PFSYNC_SNAPPED); 1450 CLR(t->tdb_flags, TDBF_PFSYNC); 1451 mtx_leave(&t->tdb_mtx); 1452 } 1453 #endif 1454 } 1455 1456 int 1457 pfsync_is_snapshot_empty(struct pfsync_snapshot *sn) 1458 { 1459 int q; 1460 1461 for (q = 0; q < PFSYNC_S_COUNT; q++) 1462 if (!TAILQ_EMPTY(&sn->sn_qs[q])) 1463 return (0); 1464 1465 if (!TAILQ_EMPTY(&sn->sn_upd_req_list)) 1466 return (0); 1467 1468 if (!TAILQ_EMPTY(&sn->sn_tdb_q)) 1469 return (0); 1470 1471 return (sn->sn_plus == NULL); 1472 } 1473 1474 void 1475 pfsync_drop(struct pfsync_softc *sc) 1476 { 1477 struct pfsync_snapshot sn; 1478 1479 pfsync_grab_snapshot(&sn, sc); 1480 pfsync_drop_snapshot(&sn); 1481 } 1482 1483 void 1484 pfsync_send_dispatch(void *xmq) 1485 { 1486 struct mbuf_queue *mq = xmq; 1487 struct pfsync_softc *sc; 1488 struct mbuf *m; 1489 struct mbuf_list ml; 1490 int error; 1491 1492 mq_delist(mq, &ml); 1493 if (ml_empty(&ml)) 1494 return; 1495 1496 NET_LOCK(); 1497 sc = pfsyncif; 1498 if (sc == NULL) { 1499 ml_purge(&ml); 1500 goto done; 1501 } 1502 1503 while ((m = ml_dequeue(&ml)) != NULL) { 1504 if ((error = ip_output(m, NULL, NULL, IP_RAWOUTPUT, 1505 &sc->sc_imo, NULL, 0)) == 0) 1506 pfsyncstat_inc(pfsyncs_opackets); 1507 else { 1508 DPFPRINTF(LOG_DEBUG, 1509 "ip_output() @ %s failed (%d)\n", __func__, error); 1510 pfsyncstat_inc(pfsyncs_oerrors); 1511 } 1512 } 1513 done: 1514 NET_UNLOCK(); 1515 } 1516 1517 void 1518 pfsync_send_pkt(struct mbuf *m) 1519 { 1520 if (mq_enqueue(&pfsync_mq, m) != 0) { 1521 pfsyncstat_inc(pfsyncs_oerrors); 1522 DPFPRINTF(LOG_DEBUG, "mq_enqueue() @ %s failed, queue full\n", 1523 __func__); 1524 } else 1525 task_add(net_tq(0), &pfsync_task); 1526 } 1527 1528 void 1529 pfsync_sendout(void) 1530 { 1531 struct pfsync_snapshot sn; 1532 struct pfsync_softc *sc = pfsyncif; 1533 #if NBPFILTER > 0 1534 struct ifnet *ifp = &sc->sc_if; 1535 #endif 1536 struct mbuf *m; 1537 struct ip *ip; 1538 struct pfsync_header *ph; 1539 struct pfsync_subheader *subh; 1540 struct pf_state *st; 1541 struct pfsync_upd_req_item *ur; 1542 int offset; 1543 int q, count = 0; 1544 1545 if (sc == NULL || sc->sc_len == PFSYNC_MINPKT) 1546 return; 1547 1548 if (!ISSET(sc->sc_if.if_flags, IFF_RUNNING) || 1549 #if NBPFILTER > 0 1550 (ifp->if_bpf == NULL && sc->sc_sync_ifidx == 0)) { 1551 #else 1552 sc->sc_sync_ifidx == 0) { 1553 #endif 1554 pfsync_drop(sc); 1555 return; 1556 } 1557 1558 pfsync_grab_snapshot(&sn, sc); 1559 1560 /* 1561 * Check below is sufficient to prevent us from sending empty packets, 1562 * but it does not stop us from sending short packets. 1563 */ 1564 if (pfsync_is_snapshot_empty(&sn)) 1565 return; 1566 1567 MGETHDR(m, M_DONTWAIT, MT_DATA); 1568 if (m == NULL) { 1569 sc->sc_if.if_oerrors++; 1570 pfsyncstat_inc(pfsyncs_onomem); 1571 pfsync_drop_snapshot(&sn); 1572 return; 1573 } 1574 1575 if (max_linkhdr + sn.sn_len > MHLEN) { 1576 MCLGETL(m, M_DONTWAIT, max_linkhdr + sn.sn_len); 1577 if (!ISSET(m->m_flags, M_EXT)) { 1578 m_free(m); 1579 sc->sc_if.if_oerrors++; 1580 pfsyncstat_inc(pfsyncs_onomem); 1581 pfsync_drop_snapshot(&sn); 1582 return; 1583 } 1584 } 1585 m->m_data += max_linkhdr; 1586 m->m_len = m->m_pkthdr.len = sn.sn_len; 1587 1588 /* build the ip header */ 1589 ip = mtod(m, struct ip *); 1590 bcopy(&sc->sc_template, ip, sizeof(*ip)); 1591 offset = sizeof(*ip); 1592 1593 ip->ip_len = htons(m->m_pkthdr.len); 1594 ip->ip_id = htons(ip_randomid()); 1595 1596 /* build the pfsync header */ 1597 ph = (struct pfsync_header *)(m->m_data + offset); 1598 bzero(ph, sizeof(*ph)); 1599 offset += sizeof(*ph); 1600 1601 ph->version = PFSYNC_VERSION; 1602 ph->len = htons(sn.sn_len - sizeof(*ip)); 1603 bcopy(pf_status.pf_chksum, ph->pfcksum, PF_MD5_DIGEST_LENGTH); 1604 1605 if (!TAILQ_EMPTY(&sn.sn_upd_req_list)) { 1606 subh = (struct pfsync_subheader *)(m->m_data + offset); 1607 offset += sizeof(*subh); 1608 1609 count = 0; 1610 while ((ur = TAILQ_FIRST(&sn.sn_upd_req_list)) != NULL) { 1611 TAILQ_REMOVE(&sn.sn_upd_req_list, ur, ur_snap); 1612 1613 bcopy(&ur->ur_msg, m->m_data + offset, 1614 sizeof(ur->ur_msg)); 1615 offset += sizeof(ur->ur_msg); 1616 1617 pool_put(&sc->sc_pool, ur); 1618 1619 count++; 1620 } 1621 1622 bzero(subh, sizeof(*subh)); 1623 subh->len = sizeof(ur->ur_msg) >> 2; 1624 subh->action = PFSYNC_ACT_UPD_REQ; 1625 subh->count = htons(count); 1626 } 1627 1628 /* has someone built a custom region for us to add? */ 1629 if (sn.sn_plus != NULL) { 1630 bcopy(sn.sn_plus, m->m_data + offset, sn.sn_pluslen); 1631 offset += sn.sn_pluslen; 1632 sn.sn_plus = NULL; /* XXX memory leak ? */ 1633 } 1634 1635 #if defined(IPSEC) 1636 if (!TAILQ_EMPTY(&sn.sn_tdb_q)) { 1637 struct tdb *t; 1638 1639 subh = (struct pfsync_subheader *)(m->m_data + offset); 1640 offset += sizeof(*subh); 1641 1642 count = 0; 1643 while ((t = TAILQ_FIRST(&sn.sn_tdb_q)) != NULL) { 1644 TAILQ_REMOVE(&sn.sn_tdb_q, t, tdb_sync_snap); 1645 pfsync_out_tdb(t, m->m_data + offset); 1646 offset += sizeof(struct pfsync_tdb); 1647 mtx_enter(&t->tdb_mtx); 1648 KASSERT(ISSET(t->tdb_flags, TDBF_PFSYNC_SNAPPED)); 1649 CLR(t->tdb_flags, TDBF_PFSYNC_SNAPPED); 1650 CLR(t->tdb_flags, TDBF_PFSYNC); 1651 mtx_leave(&t->tdb_mtx); 1652 tdb_unref(t); 1653 count++; 1654 } 1655 1656 bzero(subh, sizeof(*subh)); 1657 subh->action = PFSYNC_ACT_TDB; 1658 subh->len = sizeof(struct pfsync_tdb) >> 2; 1659 subh->count = htons(count); 1660 } 1661 #endif 1662 1663 /* walk the queues */ 1664 for (q = 0; q < PFSYNC_S_COUNT; q++) { 1665 if (TAILQ_EMPTY(&sn.sn_qs[q])) 1666 continue; 1667 1668 subh = (struct pfsync_subheader *)(m->m_data + offset); 1669 offset += sizeof(*subh); 1670 1671 count = 0; 1672 while ((st = TAILQ_FIRST(&sn.sn_qs[q])) != NULL) { 1673 mtx_enter(&st->mtx); 1674 TAILQ_REMOVE(&sn.sn_qs[q], st, sync_snap); 1675 KASSERT(st->sync_state == q); 1676 KASSERT(st->snapped == 1); 1677 st->sync_state = PFSYNC_S_NONE; 1678 st->snapped = 0; 1679 pfsync_qs[q].write(st, m->m_data + offset); 1680 offset += pfsync_qs[q].len; 1681 mtx_leave(&st->mtx); 1682 1683 pf_state_unref(st); 1684 count++; 1685 } 1686 1687 bzero(subh, sizeof(*subh)); 1688 subh->action = pfsync_qs[q].action; 1689 subh->len = pfsync_qs[q].len >> 2; 1690 subh->count = htons(count); 1691 } 1692 1693 /* we're done, let's put it on the wire */ 1694 #if NBPFILTER > 0 1695 if (ifp->if_bpf) { 1696 m->m_data += sizeof(*ip); 1697 m->m_len = m->m_pkthdr.len = sn.sn_len - sizeof(*ip); 1698 bpf_mtap(ifp->if_bpf, m, BPF_DIRECTION_OUT); 1699 m->m_data -= sizeof(*ip); 1700 m->m_len = m->m_pkthdr.len = sn.sn_len; 1701 } 1702 1703 if (sc->sc_sync_ifidx == 0) { 1704 sc->sc_len = PFSYNC_MINPKT; 1705 m_freem(m); 1706 return; 1707 } 1708 #endif 1709 1710 sc->sc_if.if_opackets++; 1711 sc->sc_if.if_obytes += m->m_pkthdr.len; 1712 1713 m->m_pkthdr.ph_rtableid = sc->sc_if.if_rdomain; 1714 1715 pfsync_send_pkt(m); 1716 } 1717 1718 void 1719 pfsync_insert_state(struct pf_state *st) 1720 { 1721 struct pfsync_softc *sc = pfsyncif; 1722 1723 NET_ASSERT_LOCKED(); 1724 1725 if (ISSET(st->rule.ptr->rule_flag, PFRULE_NOSYNC) || 1726 st->key[PF_SK_WIRE]->proto == IPPROTO_PFSYNC) { 1727 SET(st->state_flags, PFSTATE_NOSYNC); 1728 return; 1729 } 1730 1731 if (sc == NULL || !ISSET(sc->sc_if.if_flags, IFF_RUNNING) || 1732 ISSET(st->state_flags, PFSTATE_NOSYNC)) 1733 return; 1734 1735 if (sc->sc_len == PFSYNC_MINPKT) 1736 timeout_add_sec(&sc->sc_tmo, 1); 1737 1738 pfsync_q_ins(st, PFSYNC_S_INS); 1739 1740 st->sync_updates = 0; 1741 } 1742 1743 int 1744 pfsync_defer(struct pf_state *st, struct mbuf *m, struct pfsync_deferral **ppd) 1745 { 1746 struct pfsync_softc *sc = pfsyncif; 1747 struct pfsync_deferral *pd; 1748 unsigned int sched; 1749 1750 NET_ASSERT_LOCKED(); 1751 1752 if (!sc->sc_defer || 1753 ISSET(st->state_flags, PFSTATE_NOSYNC) || 1754 m->m_flags & (M_BCAST|M_MCAST)) 1755 return (0); 1756 1757 pd = pool_get(&sc->sc_pool, M_NOWAIT); 1758 if (pd == NULL) 1759 return (0); 1760 1761 /* 1762 * deferral queue grows faster, than timeout can consume, 1763 * we have to ask packet (caller) to help timer and dispatch 1764 * one deferral for us. 1765 * 1766 * We wish to call pfsync_undefer() here. Unfortunately we can't, 1767 * because pfsync_undefer() will be calling to ip_output(), 1768 * which in turn will call to pf_test(), which would then attempt 1769 * to grab PF_LOCK() we currently hold. 1770 */ 1771 if (sc->sc_deferred >= 128) { 1772 mtx_enter(&sc->sc_deferrals_mtx); 1773 *ppd = TAILQ_FIRST(&sc->sc_deferrals); 1774 if (*ppd != NULL) { 1775 TAILQ_REMOVE(&sc->sc_deferrals, *ppd, pd_entry); 1776 sc->sc_deferred--; 1777 } 1778 mtx_leave(&sc->sc_deferrals_mtx); 1779 } else 1780 *ppd = NULL; 1781 1782 m->m_pkthdr.pf.flags |= PF_TAG_GENERATED; 1783 SET(st->state_flags, PFSTATE_ACK); 1784 1785 pd->pd_st = pf_state_ref(st); 1786 pd->pd_m = m; 1787 1788 pd->pd_deadline = getnsecuptime() + PFSYNC_DEFER_NSEC; 1789 1790 mtx_enter(&sc->sc_deferrals_mtx); 1791 sched = TAILQ_EMPTY(&sc->sc_deferrals); 1792 1793 TAILQ_INSERT_TAIL(&sc->sc_deferrals, pd, pd_entry); 1794 sc->sc_deferred++; 1795 mtx_leave(&sc->sc_deferrals_mtx); 1796 1797 if (sched) 1798 timeout_add_nsec(&sc->sc_deferrals_tmo, PFSYNC_DEFER_NSEC); 1799 1800 schednetisr(NETISR_PFSYNC); 1801 1802 return (1); 1803 } 1804 1805 void 1806 pfsync_undefer_notify(struct pfsync_deferral *pd) 1807 { 1808 struct pf_pdesc pdesc; 1809 struct pf_state *st = pd->pd_st; 1810 1811 /* 1812 * pf_remove_state removes the state keys and sets st->timeout 1813 * to PFTM_UNLINKED. this is done under NET_LOCK which should 1814 * be held here, so we can use PFTM_UNLINKED as a test for 1815 * whether the state keys are set for the address family 1816 * lookup. 1817 */ 1818 1819 if (st->timeout == PFTM_UNLINKED) 1820 return; 1821 1822 if (st->rt == PF_ROUTETO) { 1823 if (pf_setup_pdesc(&pdesc, st->key[PF_SK_WIRE]->af, 1824 st->direction, st->kif, pd->pd_m, NULL) != PF_PASS) 1825 return; 1826 switch (st->key[PF_SK_WIRE]->af) { 1827 case AF_INET: 1828 pf_route(&pdesc, st); 1829 break; 1830 #ifdef INET6 1831 case AF_INET6: 1832 pf_route6(&pdesc, st); 1833 break; 1834 #endif /* INET6 */ 1835 default: 1836 unhandled_af(st->key[PF_SK_WIRE]->af); 1837 } 1838 pd->pd_m = pdesc.m; 1839 } else { 1840 switch (st->key[PF_SK_WIRE]->af) { 1841 case AF_INET: 1842 ip_output(pd->pd_m, NULL, NULL, 0, NULL, NULL, 0); 1843 break; 1844 #ifdef INET6 1845 case AF_INET6: 1846 ip6_output(pd->pd_m, NULL, NULL, 0, NULL, NULL); 1847 break; 1848 #endif /* INET6 */ 1849 default: 1850 unhandled_af(st->key[PF_SK_WIRE]->af); 1851 } 1852 1853 pd->pd_m = NULL; 1854 } 1855 } 1856 1857 void 1858 pfsync_free_deferral(struct pfsync_deferral *pd) 1859 { 1860 struct pfsync_softc *sc = pfsyncif; 1861 1862 pf_state_unref(pd->pd_st); 1863 m_freem(pd->pd_m); 1864 pool_put(&sc->sc_pool, pd); 1865 } 1866 1867 void 1868 pfsync_undefer(struct pfsync_deferral *pd, int drop) 1869 { 1870 struct pfsync_softc *sc = pfsyncif; 1871 1872 NET_ASSERT_LOCKED(); 1873 1874 if (sc == NULL) 1875 return; 1876 1877 CLR(pd->pd_st->state_flags, PFSTATE_ACK); 1878 if (!drop) 1879 pfsync_undefer_notify(pd); 1880 1881 pfsync_free_deferral(pd); 1882 } 1883 1884 void 1885 pfsync_deferrals_tmo(void *arg) 1886 { 1887 struct pfsync_softc *sc = arg; 1888 struct pfsync_deferral *pd; 1889 uint64_t now, nsec = 0; 1890 struct pfsync_deferrals pds = TAILQ_HEAD_INITIALIZER(pds); 1891 1892 now = getnsecuptime(); 1893 1894 mtx_enter(&sc->sc_deferrals_mtx); 1895 for (;;) { 1896 pd = TAILQ_FIRST(&sc->sc_deferrals); 1897 if (pd == NULL) 1898 break; 1899 1900 if (now < pd->pd_deadline) { 1901 nsec = pd->pd_deadline - now; 1902 break; 1903 } 1904 1905 TAILQ_REMOVE(&sc->sc_deferrals, pd, pd_entry); 1906 sc->sc_deferred--; 1907 TAILQ_INSERT_TAIL(&pds, pd, pd_entry); 1908 } 1909 mtx_leave(&sc->sc_deferrals_mtx); 1910 1911 if (nsec > 0) { 1912 /* we were looking at a pd, but it wasn't old enough */ 1913 timeout_add_nsec(&sc->sc_deferrals_tmo, nsec); 1914 } 1915 1916 if (TAILQ_EMPTY(&pds)) 1917 return; 1918 1919 NET_LOCK(); 1920 while ((pd = TAILQ_FIRST(&pds)) != NULL) { 1921 TAILQ_REMOVE(&pds, pd, pd_entry); 1922 1923 pfsync_undefer(pd, 0); 1924 } 1925 NET_UNLOCK(); 1926 } 1927 1928 void 1929 pfsync_deferred(struct pf_state *st, int drop) 1930 { 1931 struct pfsync_softc *sc = pfsyncif; 1932 struct pfsync_deferral *pd; 1933 1934 NET_ASSERT_LOCKED(); 1935 1936 mtx_enter(&sc->sc_deferrals_mtx); 1937 TAILQ_FOREACH(pd, &sc->sc_deferrals, pd_entry) { 1938 if (pd->pd_st == st) { 1939 TAILQ_REMOVE(&sc->sc_deferrals, pd, pd_entry); 1940 sc->sc_deferred--; 1941 break; 1942 } 1943 } 1944 mtx_leave(&sc->sc_deferrals_mtx); 1945 1946 if (pd != NULL) 1947 pfsync_undefer(pd, drop); 1948 } 1949 1950 void 1951 pfsync_update_state(struct pf_state *st) 1952 { 1953 struct pfsync_softc *sc = pfsyncif; 1954 int sync = 0; 1955 1956 NET_ASSERT_LOCKED(); 1957 1958 if (sc == NULL || !ISSET(sc->sc_if.if_flags, IFF_RUNNING)) 1959 return; 1960 1961 if (ISSET(st->state_flags, PFSTATE_ACK)) 1962 pfsync_deferred(st, 0); 1963 if (ISSET(st->state_flags, PFSTATE_NOSYNC)) { 1964 if (st->sync_state != PFSYNC_S_NONE) 1965 pfsync_q_del(st); 1966 return; 1967 } 1968 1969 if (sc->sc_len == PFSYNC_MINPKT) 1970 timeout_add_sec(&sc->sc_tmo, 1); 1971 1972 switch (st->sync_state) { 1973 case PFSYNC_S_UPD_C: 1974 case PFSYNC_S_UPD: 1975 case PFSYNC_S_INS: 1976 /* we're already handling it */ 1977 1978 if (st->key[PF_SK_WIRE]->proto == IPPROTO_TCP) { 1979 st->sync_updates++; 1980 if (st->sync_updates >= sc->sc_maxupdates) 1981 sync = 1; 1982 } 1983 break; 1984 1985 case PFSYNC_S_IACK: 1986 pfsync_q_del(st); 1987 case PFSYNC_S_NONE: 1988 pfsync_q_ins(st, PFSYNC_S_UPD_C); 1989 st->sync_updates = 0; 1990 break; 1991 1992 default: 1993 panic("pfsync_update_state: unexpected sync state %d", 1994 st->sync_state); 1995 } 1996 1997 if (sync || (getuptime() - st->pfsync_time) < 2) 1998 schednetisr(NETISR_PFSYNC); 1999 } 2000 2001 void 2002 pfsync_cancel_full_update(struct pfsync_softc *sc) 2003 { 2004 if (timeout_pending(&sc->sc_bulkfail_tmo) || 2005 timeout_pending(&sc->sc_bulk_tmo)) { 2006 #if NCARP > 0 2007 if (!pfsync_sync_ok) 2008 carp_group_demote_adj(&sc->sc_if, -1, 2009 "pfsync bulk cancelled"); 2010 if (sc->sc_initial_bulk) { 2011 carp_group_demote_adj(&sc->sc_if, -32, 2012 "pfsync init"); 2013 sc->sc_initial_bulk = 0; 2014 } 2015 #endif 2016 pfsync_sync_ok = 1; 2017 DPFPRINTF(LOG_INFO, "cancelling bulk update"); 2018 } 2019 timeout_del(&sc->sc_bulkfail_tmo); 2020 timeout_del(&sc->sc_bulk_tmo); 2021 sc->sc_bulk_next = NULL; 2022 sc->sc_bulk_last = NULL; 2023 sc->sc_ureq_sent = 0; 2024 sc->sc_bulk_tries = 0; 2025 } 2026 2027 void 2028 pfsync_request_full_update(struct pfsync_softc *sc) 2029 { 2030 if (sc->sc_sync_ifidx != 0 && ISSET(sc->sc_if.if_flags, IFF_RUNNING)) { 2031 /* Request a full state table update. */ 2032 sc->sc_ureq_sent = getuptime(); 2033 #if NCARP > 0 2034 if (!sc->sc_link_demoted && pfsync_sync_ok) 2035 carp_group_demote_adj(&sc->sc_if, 1, 2036 "pfsync bulk start"); 2037 #endif 2038 pfsync_sync_ok = 0; 2039 DPFPRINTF(LOG_INFO, "requesting bulk update"); 2040 timeout_add(&sc->sc_bulkfail_tmo, 4 * hz + 2041 pf_pool_limits[PF_LIMIT_STATES].limit / 2042 ((sc->sc_if.if_mtu - PFSYNC_MINPKT) / 2043 sizeof(struct pfsync_state))); 2044 pfsync_request_update(0, 0); 2045 } 2046 } 2047 2048 void 2049 pfsync_request_update(u_int32_t creatorid, u_int64_t id) 2050 { 2051 struct pfsync_softc *sc = pfsyncif; 2052 struct pfsync_upd_req_item *item; 2053 size_t nlen, sclen; 2054 int retry; 2055 2056 /* 2057 * this code does nothing to prevent multiple update requests for the 2058 * same state being generated. 2059 */ 2060 2061 item = pool_get(&sc->sc_pool, PR_NOWAIT); 2062 if (item == NULL) { 2063 /* XXX stats */ 2064 return; 2065 } 2066 2067 item->ur_msg.id = id; 2068 item->ur_msg.creatorid = creatorid; 2069 2070 for (;;) { 2071 mtx_enter(&sc->sc_upd_req_mtx); 2072 2073 nlen = sizeof(struct pfsync_upd_req); 2074 if (TAILQ_EMPTY(&sc->sc_upd_req_list)) 2075 nlen += sizeof(struct pfsync_subheader); 2076 2077 sclen = atomic_add_long_nv(&sc->sc_len, nlen); 2078 retry = (sclen > sc->sc_if.if_mtu); 2079 if (retry) 2080 atomic_sub_long(&sc->sc_len, nlen); 2081 else 2082 TAILQ_INSERT_TAIL(&sc->sc_upd_req_list, item, ur_entry); 2083 2084 mtx_leave(&sc->sc_upd_req_mtx); 2085 2086 if (!retry) 2087 break; 2088 2089 pfsync_sendout(); 2090 } 2091 2092 schednetisr(NETISR_PFSYNC); 2093 } 2094 2095 void 2096 pfsync_update_state_req(struct pf_state *st) 2097 { 2098 struct pfsync_softc *sc = pfsyncif; 2099 2100 if (sc == NULL) 2101 panic("pfsync_update_state_req: nonexistent instance"); 2102 2103 if (ISSET(st->state_flags, PFSTATE_NOSYNC)) { 2104 if (st->sync_state != PFSYNC_S_NONE) 2105 pfsync_q_del(st); 2106 return; 2107 } 2108 2109 switch (st->sync_state) { 2110 case PFSYNC_S_UPD_C: 2111 case PFSYNC_S_IACK: 2112 pfsync_q_del(st); 2113 case PFSYNC_S_NONE: 2114 pfsync_q_ins(st, PFSYNC_S_UPD); 2115 schednetisr(NETISR_PFSYNC); 2116 return; 2117 2118 case PFSYNC_S_INS: 2119 case PFSYNC_S_UPD: 2120 case PFSYNC_S_DEL: 2121 /* we're already handling it */ 2122 return; 2123 2124 default: 2125 panic("pfsync_update_state_req: unexpected sync state %d", 2126 st->sync_state); 2127 } 2128 } 2129 2130 void 2131 pfsync_delete_state(struct pf_state *st) 2132 { 2133 struct pfsync_softc *sc = pfsyncif; 2134 2135 NET_ASSERT_LOCKED(); 2136 2137 if (sc == NULL || !ISSET(sc->sc_if.if_flags, IFF_RUNNING)) 2138 return; 2139 2140 if (ISSET(st->state_flags, PFSTATE_ACK)) 2141 pfsync_deferred(st, 1); 2142 if (ISSET(st->state_flags, PFSTATE_NOSYNC)) { 2143 if (st->sync_state != PFSYNC_S_NONE) 2144 pfsync_q_del(st); 2145 return; 2146 } 2147 2148 if (sc->sc_len == PFSYNC_MINPKT) 2149 timeout_add_sec(&sc->sc_tmo, 1); 2150 2151 switch (st->sync_state) { 2152 case PFSYNC_S_INS: 2153 /* we never got to tell the world so just forget about it */ 2154 pfsync_q_del(st); 2155 return; 2156 2157 case PFSYNC_S_UPD_C: 2158 case PFSYNC_S_UPD: 2159 case PFSYNC_S_IACK: 2160 pfsync_q_del(st); 2161 /* 2162 * FALLTHROUGH to putting it on the del list 2163 * Note on reference count bookkeeping: 2164 * pfsync_q_del() drops reference for queue 2165 * ownership. But the st entry survives, because 2166 * our caller still holds a reference. 2167 */ 2168 2169 case PFSYNC_S_NONE: 2170 /* 2171 * We either fall through here, or there is no reference to 2172 * st owned by pfsync queues at this point. 2173 * 2174 * Calling pfsync_q_ins() puts st to del queue. The pfsync_q_ins() 2175 * grabs a reference for delete queue. 2176 */ 2177 pfsync_q_ins(st, PFSYNC_S_DEL); 2178 return; 2179 2180 default: 2181 panic("pfsync_delete_state: unexpected sync state %d", 2182 st->sync_state); 2183 } 2184 } 2185 2186 void 2187 pfsync_clear_states(u_int32_t creatorid, const char *ifname) 2188 { 2189 struct pfsync_softc *sc = pfsyncif; 2190 struct { 2191 struct pfsync_subheader subh; 2192 struct pfsync_clr clr; 2193 } __packed r; 2194 2195 NET_ASSERT_LOCKED(); 2196 2197 if (sc == NULL || !ISSET(sc->sc_if.if_flags, IFF_RUNNING)) 2198 return; 2199 2200 bzero(&r, sizeof(r)); 2201 2202 r.subh.action = PFSYNC_ACT_CLR; 2203 r.subh.len = sizeof(struct pfsync_clr) >> 2; 2204 r.subh.count = htons(1); 2205 2206 strlcpy(r.clr.ifname, ifname, sizeof(r.clr.ifname)); 2207 r.clr.creatorid = creatorid; 2208 2209 pfsync_send_plus(&r, sizeof(r)); 2210 } 2211 2212 void 2213 pfsync_iack(struct pf_state *st) 2214 { 2215 pfsync_q_ins(st, PFSYNC_S_IACK); 2216 schednetisr(NETISR_PFSYNC); 2217 } 2218 2219 void 2220 pfsync_q_ins(struct pf_state *st, int q) 2221 { 2222 struct pfsync_softc *sc = pfsyncif; 2223 size_t nlen, sclen; 2224 2225 if (sc->sc_len < PFSYNC_MINPKT) 2226 panic("pfsync pkt len is too low %zd", sc->sc_len); 2227 do { 2228 mtx_enter(&sc->sc_st_mtx); 2229 mtx_enter(&st->mtx); 2230 2231 /* 2232 * There are either two threads trying to update the 2233 * the same state, or the state is just being processed 2234 * (is on snapshot queue). 2235 */ 2236 if (st->sync_state != PFSYNC_S_NONE) { 2237 mtx_leave(&st->mtx); 2238 mtx_leave(&sc->sc_st_mtx); 2239 break; 2240 } 2241 2242 nlen = pfsync_qs[q].len; 2243 2244 if (TAILQ_EMPTY(&sc->sc_qs[q])) 2245 nlen += sizeof(struct pfsync_subheader); 2246 2247 sclen = atomic_add_long_nv(&sc->sc_len, nlen); 2248 if (sclen > sc->sc_if.if_mtu) { 2249 atomic_sub_long(&sc->sc_len, nlen); 2250 mtx_leave(&st->mtx); 2251 mtx_leave(&sc->sc_st_mtx); 2252 pfsync_sendout(); 2253 continue; 2254 } 2255 2256 pf_state_ref(st); 2257 2258 TAILQ_INSERT_TAIL(&sc->sc_qs[q], st, sync_list); 2259 st->sync_state = q; 2260 mtx_leave(&st->mtx); 2261 mtx_leave(&sc->sc_st_mtx); 2262 } while (0); 2263 } 2264 2265 void 2266 pfsync_q_del(struct pf_state *st) 2267 { 2268 struct pfsync_softc *sc = pfsyncif; 2269 int q; 2270 2271 mtx_enter(&sc->sc_st_mtx); 2272 mtx_enter(&st->mtx); 2273 q = st->sync_state; 2274 /* 2275 * re-check under mutex 2276 * if state is snapped already, then just bail out, because we came 2277 * too late, the state is being just processed/dispatched to peer. 2278 */ 2279 if ((q == PFSYNC_S_NONE) || (st->snapped)) { 2280 mtx_leave(&st->mtx); 2281 mtx_leave(&sc->sc_st_mtx); 2282 return; 2283 } 2284 atomic_sub_long(&sc->sc_len, pfsync_qs[q].len); 2285 TAILQ_REMOVE(&sc->sc_qs[q], st, sync_list); 2286 if (TAILQ_EMPTY(&sc->sc_qs[q])) 2287 atomic_sub_long(&sc->sc_len, sizeof (struct pfsync_subheader)); 2288 st->sync_state = PFSYNC_S_NONE; 2289 mtx_leave(&st->mtx); 2290 mtx_leave(&sc->sc_st_mtx); 2291 2292 pf_state_unref(st); 2293 } 2294 2295 #if defined(IPSEC) 2296 void 2297 pfsync_update_tdb(struct tdb *t, int output) 2298 { 2299 struct pfsync_softc *sc = pfsyncif; 2300 size_t nlen, sclen; 2301 2302 if (sc == NULL) 2303 return; 2304 2305 if (!ISSET(t->tdb_flags, TDBF_PFSYNC)) { 2306 do { 2307 mtx_enter(&sc->sc_tdb_mtx); 2308 nlen = sizeof(struct pfsync_tdb); 2309 2310 mtx_enter(&t->tdb_mtx); 2311 if (ISSET(t->tdb_flags, TDBF_PFSYNC)) { 2312 /* we've lost race, no action for us then */ 2313 mtx_leave(&t->tdb_mtx); 2314 mtx_leave(&sc->sc_tdb_mtx); 2315 break; 2316 } 2317 2318 if (TAILQ_EMPTY(&sc->sc_tdb_q)) 2319 nlen += sizeof(struct pfsync_subheader); 2320 2321 sclen = atomic_add_long_nv(&sc->sc_len, nlen); 2322 if (sclen > sc->sc_if.if_mtu) { 2323 atomic_sub_long(&sc->sc_len, nlen); 2324 mtx_leave(&t->tdb_mtx); 2325 mtx_leave(&sc->sc_tdb_mtx); 2326 pfsync_sendout(); 2327 continue; 2328 } 2329 2330 TAILQ_INSERT_TAIL(&sc->sc_tdb_q, t, tdb_sync_entry); 2331 tdb_ref(t); 2332 SET(t->tdb_flags, TDBF_PFSYNC); 2333 mtx_leave(&t->tdb_mtx); 2334 2335 mtx_leave(&sc->sc_tdb_mtx); 2336 t->tdb_updates = 0; 2337 } while (0); 2338 } else { 2339 if (++t->tdb_updates >= sc->sc_maxupdates) 2340 schednetisr(NETISR_PFSYNC); 2341 } 2342 2343 mtx_enter(&t->tdb_mtx); 2344 if (output) 2345 SET(t->tdb_flags, TDBF_PFSYNC_RPL); 2346 else 2347 CLR(t->tdb_flags, TDBF_PFSYNC_RPL); 2348 mtx_leave(&t->tdb_mtx); 2349 } 2350 #endif 2351 2352 #if defined(IPSEC) 2353 void 2354 pfsync_delete_tdb(struct tdb *t) 2355 { 2356 struct pfsync_softc *sc = pfsyncif; 2357 size_t nlen; 2358 2359 if (sc == NULL || !ISSET(t->tdb_flags, TDBF_PFSYNC)) 2360 return; 2361 2362 mtx_enter(&sc->sc_tdb_mtx); 2363 2364 /* 2365 * if tdb entry is just being processed (found in snapshot), 2366 * then it can not be deleted. we just came too late 2367 */ 2368 if (ISSET(t->tdb_flags, TDBF_PFSYNC_SNAPPED)) { 2369 mtx_leave(&sc->sc_tdb_mtx); 2370 return; 2371 } 2372 2373 TAILQ_REMOVE(&sc->sc_tdb_q, t, tdb_sync_entry); 2374 2375 mtx_enter(&t->tdb_mtx); 2376 CLR(t->tdb_flags, TDBF_PFSYNC); 2377 mtx_leave(&t->tdb_mtx); 2378 2379 nlen = sizeof(struct pfsync_tdb); 2380 if (TAILQ_EMPTY(&sc->sc_tdb_q)) 2381 nlen += sizeof(struct pfsync_subheader); 2382 atomic_sub_long(&sc->sc_len, nlen); 2383 2384 mtx_leave(&sc->sc_tdb_mtx); 2385 2386 tdb_unref(t); 2387 } 2388 #endif 2389 2390 void 2391 pfsync_out_tdb(struct tdb *t, void *buf) 2392 { 2393 struct pfsync_tdb *ut = buf; 2394 2395 bzero(ut, sizeof(*ut)); 2396 ut->spi = t->tdb_spi; 2397 bcopy(&t->tdb_dst, &ut->dst, sizeof(ut->dst)); 2398 /* 2399 * When a failover happens, the master's rpl is probably above 2400 * what we see here (we may be up to a second late), so 2401 * increase it a bit for outbound tdbs to manage most such 2402 * situations. 2403 * 2404 * For now, just add an offset that is likely to be larger 2405 * than the number of packets we can see in one second. The RFC 2406 * just says the next packet must have a higher seq value. 2407 * 2408 * XXX What is a good algorithm for this? We could use 2409 * a rate-determined increase, but to know it, we would have 2410 * to extend struct tdb. 2411 * XXX pt->rpl can wrap over MAXINT, but if so the real tdb 2412 * will soon be replaced anyway. For now, just don't handle 2413 * this edge case. 2414 */ 2415 #define RPL_INCR 16384 2416 ut->rpl = htobe64(t->tdb_rpl + (ISSET(t->tdb_flags, TDBF_PFSYNC_RPL) ? 2417 RPL_INCR : 0)); 2418 ut->cur_bytes = htobe64(t->tdb_cur_bytes); 2419 ut->sproto = t->tdb_sproto; 2420 ut->rdomain = htons(t->tdb_rdomain); 2421 } 2422 2423 void 2424 pfsync_bulk_start(void) 2425 { 2426 struct pfsync_softc *sc = pfsyncif; 2427 2428 NET_ASSERT_LOCKED(); 2429 2430 /* 2431 * pf gc via pfsync_state_in_use reads sc_bulk_next and 2432 * sc_bulk_last while exclusively holding the pf_state_list 2433 * rwlock. make sure it can't race with us setting these 2434 * pointers. they basically act as hazards, and borrow the 2435 * lists state reference count. 2436 */ 2437 rw_enter_read(&pf_state_list.pfs_rwl); 2438 2439 /* get a consistent view of the list pointers */ 2440 mtx_enter(&pf_state_list.pfs_mtx); 2441 if (sc->sc_bulk_next == NULL) 2442 sc->sc_bulk_next = TAILQ_FIRST(&pf_state_list.pfs_list); 2443 2444 sc->sc_bulk_last = TAILQ_LAST(&pf_state_list.pfs_list, pf_state_queue); 2445 mtx_leave(&pf_state_list.pfs_mtx); 2446 2447 rw_exit_read(&pf_state_list.pfs_rwl); 2448 2449 DPFPRINTF(LOG_INFO, "received bulk update request"); 2450 2451 if (sc->sc_bulk_last == NULL) 2452 pfsync_bulk_status(PFSYNC_BUS_END); 2453 else { 2454 sc->sc_ureq_received = getuptime(); 2455 2456 pfsync_bulk_status(PFSYNC_BUS_START); 2457 timeout_add(&sc->sc_bulk_tmo, 0); 2458 } 2459 } 2460 2461 void 2462 pfsync_bulk_update(void *arg) 2463 { 2464 struct pfsync_softc *sc; 2465 struct pf_state *st; 2466 int i = 0; 2467 2468 NET_LOCK(); 2469 sc = pfsyncif; 2470 if (sc == NULL) 2471 goto out; 2472 2473 rw_enter_read(&pf_state_list.pfs_rwl); 2474 st = sc->sc_bulk_next; 2475 sc->sc_bulk_next = NULL; 2476 2477 if (st == NULL) { 2478 rw_exit_read(&pf_state_list.pfs_rwl); 2479 goto out; 2480 } 2481 2482 for (;;) { 2483 if (st->sync_state == PFSYNC_S_NONE && 2484 st->timeout < PFTM_MAX && 2485 st->pfsync_time <= sc->sc_ureq_received) { 2486 pfsync_update_state_req(st); 2487 i++; 2488 } 2489 2490 st = TAILQ_NEXT(st, entry_list); 2491 if ((st == NULL) || (st == sc->sc_bulk_last)) { 2492 /* we're done */ 2493 sc->sc_bulk_last = NULL; 2494 pfsync_bulk_status(PFSYNC_BUS_END); 2495 break; 2496 } 2497 2498 if (i > 1 && (sc->sc_if.if_mtu - sc->sc_len) < 2499 sizeof(struct pfsync_state)) { 2500 /* we've filled a packet */ 2501 sc->sc_bulk_next = st; 2502 timeout_add(&sc->sc_bulk_tmo, 1); 2503 break; 2504 } 2505 } 2506 2507 rw_exit_read(&pf_state_list.pfs_rwl); 2508 out: 2509 NET_UNLOCK(); 2510 } 2511 2512 void 2513 pfsync_bulk_status(u_int8_t status) 2514 { 2515 struct { 2516 struct pfsync_subheader subh; 2517 struct pfsync_bus bus; 2518 } __packed r; 2519 2520 struct pfsync_softc *sc = pfsyncif; 2521 2522 bzero(&r, sizeof(r)); 2523 2524 r.subh.action = PFSYNC_ACT_BUS; 2525 r.subh.len = sizeof(struct pfsync_bus) >> 2; 2526 r.subh.count = htons(1); 2527 2528 r.bus.creatorid = pf_status.hostid; 2529 r.bus.endtime = htonl(getuptime() - sc->sc_ureq_received); 2530 r.bus.status = status; 2531 2532 pfsync_send_plus(&r, sizeof(r)); 2533 } 2534 2535 void 2536 pfsync_bulk_fail(void *arg) 2537 { 2538 struct pfsync_softc *sc; 2539 2540 NET_LOCK(); 2541 sc = pfsyncif; 2542 if (sc == NULL) 2543 goto out; 2544 if (sc->sc_bulk_tries++ < PFSYNC_MAX_BULKTRIES) { 2545 /* Try again */ 2546 timeout_add_sec(&sc->sc_bulkfail_tmo, 5); 2547 pfsync_request_update(0, 0); 2548 } else { 2549 /* Pretend like the transfer was ok */ 2550 sc->sc_ureq_sent = 0; 2551 sc->sc_bulk_tries = 0; 2552 #if NCARP > 0 2553 if (!pfsync_sync_ok) 2554 carp_group_demote_adj(&sc->sc_if, -1, 2555 sc->sc_link_demoted ? 2556 "pfsync link state up" : 2557 "pfsync bulk fail"); 2558 if (sc->sc_initial_bulk) { 2559 carp_group_demote_adj(&sc->sc_if, -32, 2560 "pfsync init"); 2561 sc->sc_initial_bulk = 0; 2562 } 2563 #endif 2564 pfsync_sync_ok = 1; 2565 sc->sc_link_demoted = 0; 2566 DPFPRINTF(LOG_ERR, "failed to receive bulk update"); 2567 } 2568 out: 2569 NET_UNLOCK(); 2570 } 2571 2572 void 2573 pfsync_send_plus(void *plus, size_t pluslen) 2574 { 2575 struct pfsync_softc *sc = pfsyncif; 2576 2577 if (sc->sc_len + pluslen > sc->sc_if.if_mtu) 2578 pfsync_sendout(); 2579 2580 sc->sc_plus = plus; 2581 sc->sc_pluslen = pluslen; 2582 atomic_add_long(&sc->sc_len, pluslen); 2583 2584 pfsync_sendout(); 2585 } 2586 2587 int 2588 pfsync_is_up(void) 2589 { 2590 struct pfsync_softc *sc = pfsyncif; 2591 2592 if (sc == NULL || !ISSET(sc->sc_if.if_flags, IFF_RUNNING)) 2593 return (0); 2594 2595 return (1); 2596 } 2597 2598 int 2599 pfsync_state_in_use(struct pf_state *st) 2600 { 2601 struct pfsync_softc *sc = pfsyncif; 2602 2603 if (sc == NULL) 2604 return (0); 2605 2606 rw_assert_wrlock(&pf_state_list.pfs_rwl); 2607 2608 if (st->sync_state != PFSYNC_S_NONE || 2609 st == sc->sc_bulk_next || 2610 st == sc->sc_bulk_last) 2611 return (1); 2612 2613 return (0); 2614 } 2615 2616 void 2617 pfsync_timeout(void *arg) 2618 { 2619 NET_LOCK(); 2620 pfsync_sendout(); 2621 NET_UNLOCK(); 2622 } 2623 2624 /* this is a softnet/netisr handler */ 2625 void 2626 pfsyncintr(void) 2627 { 2628 pfsync_sendout(); 2629 } 2630 2631 int 2632 pfsync_sysctl_pfsyncstat(void *oldp, size_t *oldlenp, void *newp) 2633 { 2634 struct pfsyncstats pfsyncstat; 2635 2636 CTASSERT(sizeof(pfsyncstat) == (pfsyncs_ncounters * sizeof(uint64_t))); 2637 memset(&pfsyncstat, 0, sizeof pfsyncstat); 2638 counters_read(pfsynccounters, (uint64_t *)&pfsyncstat, 2639 pfsyncs_ncounters); 2640 return (sysctl_rdstruct(oldp, oldlenp, newp, 2641 &pfsyncstat, sizeof(pfsyncstat))); 2642 } 2643 2644 int 2645 pfsync_sysctl(int *name, u_int namelen, void *oldp, size_t *oldlenp, void *newp, 2646 size_t newlen) 2647 { 2648 /* All sysctl names at this level are terminal. */ 2649 if (namelen != 1) 2650 return (ENOTDIR); 2651 2652 switch (name[0]) { 2653 case PFSYNCCTL_STATS: 2654 return (pfsync_sysctl_pfsyncstat(oldp, oldlenp, newp)); 2655 default: 2656 return (ENOPROTOOPT); 2657 } 2658 } 2659