1 /*- 2 * SPDX-License-Identifier: (BSD-2-Clause AND ISC) 3 * 4 * Copyright (c) 2002 Michael Shalayeff 5 * Copyright (c) 2012 Gleb Smirnoff <glebius@FreeBSD.org> 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 20 * IN NO EVENT SHALL THE AUTHOR OR HIS RELATIVES BE LIABLE FOR ANY DIRECT, 21 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 22 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 23 * SERVICES; LOSS OF MIND, USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 25 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 26 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF 27 * THE POSSIBILITY OF SUCH DAMAGE. 28 */ 29 30 /*- 31 * Copyright (c) 2009 David Gwynne <dlg@openbsd.org> 32 * 33 * Permission to use, copy, modify, and distribute this software for any 34 * purpose with or without fee is hereby granted, provided that the above 35 * copyright notice and this permission notice appear in all copies. 36 * 37 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 38 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 39 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 40 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 41 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 42 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 43 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 44 */ 45 46 /* 47 * $OpenBSD: if_pfsync.c,v 1.110 2009/02/24 05:39:19 dlg Exp $ 48 * 49 * Revisions picked from OpenBSD after revision 1.110 import: 50 * 1.119 - don't m_copydata() beyond the len of mbuf in pfsync_input() 51 * 1.118, 1.124, 1.148, 1.149, 1.151, 1.171 - fixes to bulk updates 52 * 1.120, 1.175 - use monotonic time_uptime 53 * 1.122 - reduce number of updates for non-TCP sessions 54 * 1.125, 1.127 - rewrite merge or stale processing 55 * 1.128 - cleanups 56 * 1.146 - bzero() mbuf before sparsely filling it with data 57 * 1.170 - SIOCSIFMTU checks 58 * 1.126, 1.142 - deferred packets processing 59 * 1.173 - correct expire time processing 60 */ 61 62 #include <sys/cdefs.h> 63 #include "opt_inet.h" 64 #include "opt_inet6.h" 65 #include "opt_pf.h" 66 67 #include <sys/param.h> 68 #include <sys/bus.h> 69 #include <sys/endian.h> 70 #include <sys/interrupt.h> 71 #include <sys/kernel.h> 72 #include <sys/lock.h> 73 #include <sys/mbuf.h> 74 #include <sys/module.h> 75 #include <sys/mutex.h> 76 #include <sys/nv.h> 77 #include <sys/priv.h> 78 #include <sys/smp.h> 79 #include <sys/socket.h> 80 #include <sys/sockio.h> 81 #include <sys/sysctl.h> 82 #include <sys/syslog.h> 83 84 #include <net/bpf.h> 85 #include <net/if.h> 86 #include <net/if_var.h> 87 #include <net/if_clone.h> 88 #include <net/if_private.h> 89 #include <net/if_types.h> 90 #include <net/vnet.h> 91 #include <net/pfvar.h> 92 #include <net/route.h> 93 #include <net/if_pfsync.h> 94 95 #include <netinet/if_ether.h> 96 #include <netinet/in.h> 97 #include <netinet/in_var.h> 98 #include <netinet6/in6_var.h> 99 #include <netinet/ip.h> 100 #include <netinet/ip6.h> 101 #include <netinet/ip_carp.h> 102 #include <netinet/ip_var.h> 103 #include <netinet/tcp.h> 104 #include <netinet/tcp_fsm.h> 105 #include <netinet/tcp_seq.h> 106 107 #include <netinet/ip6.h> 108 #include <netinet6/ip6_var.h> 109 #include <netinet6/scope6_var.h> 110 111 #include <netpfil/pf/pfsync_nv.h> 112 113 struct pfsync_bucket; 114 struct pfsync_softc; 115 116 union inet_template { 117 struct ip ipv4; 118 struct ip6_hdr ipv6; 119 }; 120 121 #define PFSYNC_MINPKT ( \ 122 sizeof(union inet_template) + \ 123 sizeof(struct pfsync_header) + \ 124 sizeof(struct pfsync_subheader) ) 125 126 static int pfsync_upd_tcp(struct pf_kstate *, struct pfsync_state_peer *, 127 struct pfsync_state_peer *); 128 static int pfsync_in_clr(struct mbuf *, int, int, int, int); 129 static int pfsync_in_ins(struct mbuf *, int, int, int, int); 130 static int pfsync_in_iack(struct mbuf *, int, int, int, int); 131 static int pfsync_in_upd(struct mbuf *, int, int, int, int); 132 static int pfsync_in_upd_c(struct mbuf *, int, int, int, int); 133 static int pfsync_in_ureq(struct mbuf *, int, int, int, int); 134 static int pfsync_in_del_c(struct mbuf *, int, int, int, int); 135 static int pfsync_in_bus(struct mbuf *, int, int, int, int); 136 static int pfsync_in_tdb(struct mbuf *, int, int, int, int); 137 static int pfsync_in_eof(struct mbuf *, int, int, int, int); 138 static int pfsync_in_error(struct mbuf *, int, int, int, int); 139 140 static int (*pfsync_acts[])(struct mbuf *, int, int, int, int) = { 141 pfsync_in_clr, /* PFSYNC_ACT_CLR */ 142 pfsync_in_ins, /* PFSYNC_ACT_INS_1301 */ 143 pfsync_in_iack, /* PFSYNC_ACT_INS_ACK */ 144 pfsync_in_upd, /* PFSYNC_ACT_UPD_1301 */ 145 pfsync_in_upd_c, /* PFSYNC_ACT_UPD_C */ 146 pfsync_in_ureq, /* PFSYNC_ACT_UPD_REQ */ 147 pfsync_in_error, /* PFSYNC_ACT_DEL */ 148 pfsync_in_del_c, /* PFSYNC_ACT_DEL_C */ 149 pfsync_in_error, /* PFSYNC_ACT_INS_F */ 150 pfsync_in_error, /* PFSYNC_ACT_DEL_F */ 151 pfsync_in_bus, /* PFSYNC_ACT_BUS */ 152 pfsync_in_tdb, /* PFSYNC_ACT_TDB */ 153 pfsync_in_eof, /* PFSYNC_ACT_EOF */ 154 pfsync_in_ins, /* PFSYNC_ACT_INS_1400 */ 155 pfsync_in_upd, /* PFSYNC_ACT_UPD_1400 */ 156 }; 157 158 struct pfsync_q { 159 void (*write)(struct pf_kstate *, void *); 160 size_t len; 161 u_int8_t action; 162 }; 163 164 /* We have the following sync queues */ 165 enum pfsync_q_id { 166 PFSYNC_Q_INS_1301, 167 PFSYNC_Q_INS_1400, 168 PFSYNC_Q_IACK, 169 PFSYNC_Q_UPD_1301, 170 PFSYNC_Q_UPD_1400, 171 PFSYNC_Q_UPD_C, 172 PFSYNC_Q_DEL_C, 173 PFSYNC_Q_COUNT, 174 }; 175 176 /* Functions for building messages for given queue */ 177 static void pfsync_out_state_1301(struct pf_kstate *, void *); 178 static void pfsync_out_state_1400(struct pf_kstate *, void *); 179 static void pfsync_out_iack(struct pf_kstate *, void *); 180 static void pfsync_out_upd_c(struct pf_kstate *, void *); 181 static void pfsync_out_del_c(struct pf_kstate *, void *); 182 183 /* Attach those functions to queue */ 184 static struct pfsync_q pfsync_qs[] = { 185 { pfsync_out_state_1301, sizeof(struct pfsync_state_1301), PFSYNC_ACT_INS_1301 }, 186 { pfsync_out_state_1400, sizeof(struct pfsync_state_1400), PFSYNC_ACT_INS_1400 }, 187 { pfsync_out_iack, sizeof(struct pfsync_ins_ack), PFSYNC_ACT_INS_ACK }, 188 { pfsync_out_state_1301, sizeof(struct pfsync_state_1301), PFSYNC_ACT_UPD_1301 }, 189 { pfsync_out_state_1400, sizeof(struct pfsync_state_1400), PFSYNC_ACT_UPD_1400 }, 190 { pfsync_out_upd_c, sizeof(struct pfsync_upd_c), PFSYNC_ACT_UPD_C }, 191 { pfsync_out_del_c, sizeof(struct pfsync_del_c), PFSYNC_ACT_DEL_C } 192 }; 193 194 /* Map queue to pf_kstate->sync_state */ 195 static u_int8_t pfsync_qid_sstate[] = { 196 PFSYNC_S_INS, /* PFSYNC_Q_INS_1301 */ 197 PFSYNC_S_INS, /* PFSYNC_Q_INS_1400 */ 198 PFSYNC_S_IACK, /* PFSYNC_Q_IACK */ 199 PFSYNC_S_UPD, /* PFSYNC_Q_UPD_1301 */ 200 PFSYNC_S_UPD, /* PFSYNC_Q_UPD_1400 */ 201 PFSYNC_S_UPD_C, /* PFSYNC_Q_UPD_C */ 202 PFSYNC_S_DEL_C, /* PFSYNC_Q_DEL_C */ 203 }; 204 205 /* Map pf_kstate->sync_state to queue */ 206 static enum pfsync_q_id pfsync_sstate_to_qid(u_int8_t); 207 208 static void pfsync_q_ins(struct pf_kstate *, int sync_state, bool); 209 static void pfsync_q_del(struct pf_kstate *, bool, struct pfsync_bucket *); 210 211 static void pfsync_update_state(struct pf_kstate *); 212 static void pfsync_tx(struct pfsync_softc *, struct mbuf *); 213 214 struct pfsync_upd_req_item { 215 TAILQ_ENTRY(pfsync_upd_req_item) ur_entry; 216 struct pfsync_upd_req ur_msg; 217 }; 218 219 struct pfsync_deferral { 220 struct pfsync_softc *pd_sc; 221 TAILQ_ENTRY(pfsync_deferral) pd_entry; 222 struct callout pd_tmo; 223 224 struct pf_kstate *pd_st; 225 struct mbuf *pd_m; 226 }; 227 228 struct pfsync_bucket 229 { 230 int b_id; 231 struct pfsync_softc *b_sc; 232 struct mtx b_mtx; 233 struct callout b_tmo; 234 int b_flags; 235 #define PFSYNCF_BUCKET_PUSH 0x00000001 236 237 size_t b_len; 238 TAILQ_HEAD(, pf_kstate) b_qs[PFSYNC_Q_COUNT]; 239 TAILQ_HEAD(, pfsync_upd_req_item) b_upd_req_list; 240 TAILQ_HEAD(, pfsync_deferral) b_deferrals; 241 u_int b_deferred; 242 void *b_plus; 243 size_t b_pluslen; 244 245 struct ifaltq b_snd; 246 }; 247 248 struct pfsync_softc { 249 /* Configuration */ 250 struct ifnet *sc_ifp; 251 struct ifnet *sc_sync_if; 252 struct ip_moptions sc_imo; 253 struct ip6_moptions sc_im6o; 254 struct sockaddr_storage sc_sync_peer; 255 uint32_t sc_flags; 256 uint8_t sc_maxupdates; 257 union inet_template sc_template; 258 struct mtx sc_mtx; 259 uint32_t sc_version; 260 261 /* Queued data */ 262 struct pfsync_bucket *sc_buckets; 263 264 /* Bulk update info */ 265 struct mtx sc_bulk_mtx; 266 uint32_t sc_ureq_sent; 267 int sc_bulk_tries; 268 uint32_t sc_ureq_received; 269 int sc_bulk_hashid; 270 uint64_t sc_bulk_stateid; 271 uint32_t sc_bulk_creatorid; 272 struct callout sc_bulk_tmo; 273 struct callout sc_bulkfail_tmo; 274 }; 275 276 #define PFSYNC_LOCK(sc) mtx_lock(&(sc)->sc_mtx) 277 #define PFSYNC_UNLOCK(sc) mtx_unlock(&(sc)->sc_mtx) 278 #define PFSYNC_LOCK_ASSERT(sc) mtx_assert(&(sc)->sc_mtx, MA_OWNED) 279 280 #define PFSYNC_BUCKET_LOCK(b) mtx_lock(&(b)->b_mtx) 281 #define PFSYNC_BUCKET_UNLOCK(b) mtx_unlock(&(b)->b_mtx) 282 #define PFSYNC_BUCKET_LOCK_ASSERT(b) mtx_assert(&(b)->b_mtx, MA_OWNED) 283 284 #define PFSYNC_BLOCK(sc) mtx_lock(&(sc)->sc_bulk_mtx) 285 #define PFSYNC_BUNLOCK(sc) mtx_unlock(&(sc)->sc_bulk_mtx) 286 #define PFSYNC_BLOCK_ASSERT(sc) mtx_assert(&(sc)->sc_bulk_mtx, MA_OWNED) 287 288 #define PFSYNC_DEFER_TIMEOUT 20 289 290 static const char pfsyncname[] = "pfsync"; 291 static MALLOC_DEFINE(M_PFSYNC, pfsyncname, "pfsync(4) data"); 292 VNET_DEFINE_STATIC(struct pfsync_softc *, pfsyncif) = NULL; 293 #define V_pfsyncif VNET(pfsyncif) 294 VNET_DEFINE_STATIC(void *, pfsync_swi_cookie) = NULL; 295 #define V_pfsync_swi_cookie VNET(pfsync_swi_cookie) 296 VNET_DEFINE_STATIC(struct intr_event *, pfsync_swi_ie); 297 #define V_pfsync_swi_ie VNET(pfsync_swi_ie) 298 VNET_DEFINE_STATIC(struct pfsyncstats, pfsyncstats); 299 #define V_pfsyncstats VNET(pfsyncstats) 300 VNET_DEFINE_STATIC(int, pfsync_carp_adj) = CARP_MAXSKEW; 301 #define V_pfsync_carp_adj VNET(pfsync_carp_adj) 302 VNET_DEFINE_STATIC(unsigned int, pfsync_defer_timeout) = PFSYNC_DEFER_TIMEOUT; 303 #define V_pfsync_defer_timeout VNET(pfsync_defer_timeout) 304 305 static void pfsync_timeout(void *); 306 static void pfsync_push(struct pfsync_bucket *); 307 static void pfsync_push_all(struct pfsync_softc *); 308 static void pfsyncintr(void *); 309 static int pfsync_multicast_setup(struct pfsync_softc *, struct ifnet *, 310 struct in_mfilter *, struct in6_mfilter *); 311 static void pfsync_multicast_cleanup(struct pfsync_softc *); 312 static void pfsync_pointers_init(void); 313 static void pfsync_pointers_uninit(void); 314 static int pfsync_init(void); 315 static void pfsync_uninit(void); 316 317 static unsigned long pfsync_buckets; 318 319 SYSCTL_NODE(_net, OID_AUTO, pfsync, CTLFLAG_RW | CTLFLAG_MPSAFE, 0, 320 "PFSYNC"); 321 SYSCTL_STRUCT(_net_pfsync, OID_AUTO, stats, CTLFLAG_VNET | CTLFLAG_RW, 322 &VNET_NAME(pfsyncstats), pfsyncstats, 323 "PFSYNC statistics (struct pfsyncstats, net/if_pfsync.h)"); 324 SYSCTL_INT(_net_pfsync, OID_AUTO, carp_demotion_factor, CTLFLAG_VNET | CTLFLAG_RW, 325 &VNET_NAME(pfsync_carp_adj), 0, "pfsync's CARP demotion factor adjustment"); 326 SYSCTL_ULONG(_net_pfsync, OID_AUTO, pfsync_buckets, CTLFLAG_RDTUN, 327 &pfsync_buckets, 0, "Number of pfsync hash buckets"); 328 SYSCTL_UINT(_net_pfsync, OID_AUTO, defer_delay, CTLFLAG_VNET | CTLFLAG_RW, 329 &VNET_NAME(pfsync_defer_timeout), 0, "Deferred packet timeout (in ms)"); 330 331 static int pfsync_clone_create(struct if_clone *, int, caddr_t); 332 static void pfsync_clone_destroy(struct ifnet *); 333 static int pfsync_alloc_scrub_memory(struct pfsync_state_peer *, 334 struct pf_state_peer *); 335 static int pfsyncoutput(struct ifnet *, struct mbuf *, 336 const struct sockaddr *, struct route *); 337 static int pfsyncioctl(struct ifnet *, u_long, caddr_t); 338 339 static int pfsync_defer(struct pf_kstate *, struct mbuf *); 340 static void pfsync_undefer(struct pfsync_deferral *, int); 341 static void pfsync_undefer_state_locked(struct pf_kstate *, int); 342 static void pfsync_undefer_state(struct pf_kstate *, int); 343 static void pfsync_defer_tmo(void *); 344 345 static void pfsync_request_update(u_int32_t, u_int64_t); 346 static bool pfsync_update_state_req(struct pf_kstate *); 347 348 static void pfsync_drop(struct pfsync_softc *); 349 static void pfsync_sendout(int, int); 350 static void pfsync_send_plus(void *, size_t); 351 352 static void pfsync_bulk_start(void); 353 static void pfsync_bulk_status(u_int8_t); 354 static void pfsync_bulk_update(void *); 355 static void pfsync_bulk_fail(void *); 356 357 static void pfsync_detach_ifnet(struct ifnet *); 358 359 static int pfsync_pfsyncreq_to_kstatus(struct pfsyncreq *, 360 struct pfsync_kstatus *); 361 static int pfsync_kstatus_to_softc(struct pfsync_kstatus *, 362 struct pfsync_softc *); 363 364 #ifdef IPSEC 365 static void pfsync_update_net_tdb(struct pfsync_tdb *); 366 #endif 367 static struct pfsync_bucket *pfsync_get_bucket(struct pfsync_softc *, 368 struct pf_kstate *); 369 370 #define PFSYNC_MAX_BULKTRIES 12 371 372 VNET_DEFINE(struct if_clone *, pfsync_cloner); 373 #define V_pfsync_cloner VNET(pfsync_cloner) 374 375 const struct in6_addr in6addr_linklocal_pfsync_group = 376 {{{ 0xff, 0x12, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 377 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xf0 }}}; 378 static int 379 pfsync_clone_create(struct if_clone *ifc, int unit, caddr_t param) 380 { 381 struct pfsync_softc *sc; 382 struct ifnet *ifp; 383 struct pfsync_bucket *b; 384 int c; 385 enum pfsync_q_id q; 386 387 if (unit != 0) 388 return (EINVAL); 389 390 if (! pfsync_buckets) 391 pfsync_buckets = mp_ncpus * 2; 392 393 sc = malloc(sizeof(struct pfsync_softc), M_PFSYNC, M_WAITOK | M_ZERO); 394 sc->sc_flags |= PFSYNCF_OK; 395 sc->sc_maxupdates = 128; 396 sc->sc_version = PFSYNC_MSG_VERSION_DEFAULT; 397 398 ifp = sc->sc_ifp = if_alloc(IFT_PFSYNC); 399 if (ifp == NULL) { 400 free(sc, M_PFSYNC); 401 return (ENOSPC); 402 } 403 if_initname(ifp, pfsyncname, unit); 404 ifp->if_softc = sc; 405 ifp->if_ioctl = pfsyncioctl; 406 ifp->if_output = pfsyncoutput; 407 ifp->if_type = IFT_PFSYNC; 408 ifp->if_hdrlen = sizeof(struct pfsync_header); 409 ifp->if_mtu = ETHERMTU; 410 mtx_init(&sc->sc_mtx, pfsyncname, NULL, MTX_DEF); 411 mtx_init(&sc->sc_bulk_mtx, "pfsync bulk", NULL, MTX_DEF); 412 callout_init_mtx(&sc->sc_bulk_tmo, &sc->sc_bulk_mtx, 0); 413 callout_init_mtx(&sc->sc_bulkfail_tmo, &sc->sc_bulk_mtx, 0); 414 415 if_attach(ifp); 416 417 bpfattach(ifp, DLT_PFSYNC, PFSYNC_HDRLEN); 418 419 sc->sc_buckets = mallocarray(pfsync_buckets, sizeof(*sc->sc_buckets), 420 M_PFSYNC, M_ZERO | M_WAITOK); 421 for (c = 0; c < pfsync_buckets; c++) { 422 b = &sc->sc_buckets[c]; 423 mtx_init(&b->b_mtx, "pfsync bucket", NULL, MTX_DEF); 424 425 b->b_id = c; 426 b->b_sc = sc; 427 b->b_len = PFSYNC_MINPKT; 428 429 for (q = 0; q < PFSYNC_Q_COUNT; q++) 430 TAILQ_INIT(&b->b_qs[q]); 431 432 TAILQ_INIT(&b->b_upd_req_list); 433 TAILQ_INIT(&b->b_deferrals); 434 435 callout_init(&b->b_tmo, 1); 436 437 b->b_snd.ifq_maxlen = ifqmaxlen; 438 } 439 440 V_pfsyncif = sc; 441 442 return (0); 443 } 444 445 static void 446 pfsync_clone_destroy(struct ifnet *ifp) 447 { 448 struct pfsync_softc *sc = ifp->if_softc; 449 struct pfsync_bucket *b; 450 int c, ret; 451 452 for (c = 0; c < pfsync_buckets; c++) { 453 b = &sc->sc_buckets[c]; 454 /* 455 * At this stage, everything should have already been 456 * cleared by pfsync_uninit(), and we have only to 457 * drain callouts. 458 */ 459 PFSYNC_BUCKET_LOCK(b); 460 while (b->b_deferred > 0) { 461 struct pfsync_deferral *pd = 462 TAILQ_FIRST(&b->b_deferrals); 463 464 ret = callout_stop(&pd->pd_tmo); 465 PFSYNC_BUCKET_UNLOCK(b); 466 if (ret > 0) { 467 pfsync_undefer(pd, 1); 468 } else { 469 callout_drain(&pd->pd_tmo); 470 } 471 PFSYNC_BUCKET_LOCK(b); 472 } 473 MPASS(b->b_deferred == 0); 474 MPASS(TAILQ_EMPTY(&b->b_deferrals)); 475 PFSYNC_BUCKET_UNLOCK(b); 476 477 callout_drain(&b->b_tmo); 478 } 479 480 callout_drain(&sc->sc_bulkfail_tmo); 481 callout_drain(&sc->sc_bulk_tmo); 482 483 if (!(sc->sc_flags & PFSYNCF_OK) && carp_demote_adj_p) 484 (*carp_demote_adj_p)(-V_pfsync_carp_adj, "pfsync destroy"); 485 bpfdetach(ifp); 486 if_detach(ifp); 487 488 pfsync_drop(sc); 489 490 if_free(ifp); 491 pfsync_multicast_cleanup(sc); 492 mtx_destroy(&sc->sc_mtx); 493 mtx_destroy(&sc->sc_bulk_mtx); 494 495 free(sc->sc_buckets, M_PFSYNC); 496 free(sc, M_PFSYNC); 497 498 V_pfsyncif = NULL; 499 } 500 501 static int 502 pfsync_alloc_scrub_memory(struct pfsync_state_peer *s, 503 struct pf_state_peer *d) 504 { 505 if (s->scrub.scrub_flag && d->scrub == NULL) { 506 d->scrub = uma_zalloc(V_pf_state_scrub_z, M_NOWAIT | M_ZERO); 507 if (d->scrub == NULL) 508 return (ENOMEM); 509 } 510 511 return (0); 512 } 513 514 static int 515 pfsync_state_import(union pfsync_state_union *sp, int flags, int msg_version) 516 { 517 struct pfsync_softc *sc = V_pfsyncif; 518 #ifndef __NO_STRICT_ALIGNMENT 519 struct pfsync_state_key key[2]; 520 #endif 521 struct pfsync_state_key *kw, *ks; 522 struct pf_kstate *st = NULL; 523 struct pf_state_key *skw = NULL, *sks = NULL; 524 struct pf_krule *r = NULL; 525 struct pfi_kkif *kif; 526 int error; 527 528 PF_RULES_RASSERT(); 529 530 if (sp->pfs_1301.creatorid == 0) { 531 if (V_pf_status.debug >= PF_DEBUG_MISC) 532 printf("%s: invalid creator id: %08x\n", __func__, 533 ntohl(sp->pfs_1301.creatorid)); 534 return (EINVAL); 535 } 536 537 if ((kif = pfi_kkif_find(sp->pfs_1301.ifname)) == NULL) { 538 if (V_pf_status.debug >= PF_DEBUG_MISC) 539 printf("%s: unknown interface: %s\n", __func__, 540 sp->pfs_1301.ifname); 541 if (flags & PFSYNC_SI_IOCTL) 542 return (EINVAL); 543 return (0); /* skip this state */ 544 } 545 546 /* 547 * If the ruleset checksums match or the state is coming from the ioctl, 548 * it's safe to associate the state with the rule of that number. 549 */ 550 if (sp->pfs_1301.rule != htonl(-1) && sp->pfs_1301.anchor == htonl(-1) && 551 (flags & (PFSYNC_SI_IOCTL | PFSYNC_SI_CKSUM)) && ntohl(sp->pfs_1301.rule) < 552 pf_main_ruleset.rules[PF_RULESET_FILTER].active.rcount) 553 r = pf_main_ruleset.rules[ 554 PF_RULESET_FILTER].active.ptr_array[ntohl(sp->pfs_1301.rule)]; 555 else 556 r = &V_pf_default_rule; 557 558 if ((r->max_states && 559 counter_u64_fetch(r->states_cur) >= r->max_states)) 560 goto cleanup; 561 562 /* 563 * XXXGL: consider M_WAITOK in ioctl path after. 564 */ 565 st = pf_alloc_state(M_NOWAIT); 566 if (__predict_false(st == NULL)) 567 goto cleanup; 568 569 if ((skw = uma_zalloc(V_pf_state_key_z, M_NOWAIT)) == NULL) 570 goto cleanup; 571 572 #ifndef __NO_STRICT_ALIGNMENT 573 bcopy(&sp->pfs_1301.key, key, sizeof(struct pfsync_state_key) * 2); 574 kw = &key[PF_SK_WIRE]; 575 ks = &key[PF_SK_STACK]; 576 #else 577 kw = &sp->pfs_1301.key[PF_SK_WIRE]; 578 ks = &sp->pfs_1301.key[PF_SK_STACK]; 579 #endif 580 581 if (PF_ANEQ(&kw->addr[0], &ks->addr[0], sp->pfs_1301.af) || 582 PF_ANEQ(&kw->addr[1], &ks->addr[1], sp->pfs_1301.af) || 583 kw->port[0] != ks->port[0] || 584 kw->port[1] != ks->port[1]) { 585 sks = uma_zalloc(V_pf_state_key_z, M_NOWAIT); 586 if (sks == NULL) 587 goto cleanup; 588 } else 589 sks = skw; 590 591 /* allocate memory for scrub info */ 592 if (pfsync_alloc_scrub_memory(&sp->pfs_1301.src, &st->src) || 593 pfsync_alloc_scrub_memory(&sp->pfs_1301.dst, &st->dst)) 594 goto cleanup; 595 596 /* Copy to state key(s). */ 597 skw->addr[0] = kw->addr[0]; 598 skw->addr[1] = kw->addr[1]; 599 skw->port[0] = kw->port[0]; 600 skw->port[1] = kw->port[1]; 601 skw->proto = sp->pfs_1301.proto; 602 skw->af = sp->pfs_1301.af; 603 if (sks != skw) { 604 sks->addr[0] = ks->addr[0]; 605 sks->addr[1] = ks->addr[1]; 606 sks->port[0] = ks->port[0]; 607 sks->port[1] = ks->port[1]; 608 sks->proto = sp->pfs_1301.proto; 609 sks->af = sp->pfs_1301.af; 610 } 611 612 /* copy to state */ 613 bcopy(&sp->pfs_1301.rt_addr, &st->rt_addr, sizeof(st->rt_addr)); 614 st->creation = time_uptime - ntohl(sp->pfs_1301.creation); 615 st->expire = time_uptime; 616 if (sp->pfs_1301.expire) { 617 uint32_t timeout; 618 619 timeout = r->timeout[sp->pfs_1301.timeout]; 620 if (!timeout) 621 timeout = V_pf_default_rule.timeout[sp->pfs_1301.timeout]; 622 623 /* sp->expire may have been adaptively scaled by export. */ 624 st->expire -= timeout - ntohl(sp->pfs_1301.expire); 625 } 626 627 st->direction = sp->pfs_1301.direction; 628 st->act.log = sp->pfs_1301.log; 629 st->timeout = sp->pfs_1301.timeout; 630 631 switch (msg_version) { 632 case PFSYNC_MSG_VERSION_1301: 633 st->state_flags = sp->pfs_1301.state_flags; 634 /* 635 * In FreeBSD 13 pfsync lacks many attributes. Copy them 636 * from the rule if possible. If rule can't be matched 637 * clear any set options as we can't recover their 638 * parameters. 639 */ 640 if (r == &V_pf_default_rule) { 641 st->state_flags &= ~PFSTATE_SETMASK; 642 } else { 643 /* 644 * Similar to pf_rule_to_actions(). This code 645 * won't set the actions properly if they come 646 * from multiple "match" rules as only rule 647 * creating the state is send over pfsync. 648 */ 649 st->act.qid = r->qid; 650 st->act.pqid = r->pqid; 651 st->act.rtableid = r->rtableid; 652 if (r->scrub_flags & PFSTATE_SETTOS) 653 st->act.set_tos = r->set_tos; 654 st->act.min_ttl = r->min_ttl; 655 st->act.max_mss = r->max_mss; 656 st->state_flags |= (r->scrub_flags & 657 (PFSTATE_NODF|PFSTATE_RANDOMID| 658 PFSTATE_SETTOS|PFSTATE_SCRUB_TCP| 659 PFSTATE_SETPRIO)); 660 if (r->dnpipe || r->dnrpipe) { 661 if (r->free_flags & PFRULE_DN_IS_PIPE) 662 st->state_flags |= PFSTATE_DN_IS_PIPE; 663 else 664 st->state_flags &= ~PFSTATE_DN_IS_PIPE; 665 } 666 st->act.dnpipe = r->dnpipe; 667 st->act.dnrpipe = r->dnrpipe; 668 } 669 break; 670 case PFSYNC_MSG_VERSION_1400: 671 st->state_flags = ntohs(sp->pfs_1400.state_flags); 672 st->act.qid = ntohs(sp->pfs_1400.qid); 673 st->act.pqid = ntohs(sp->pfs_1400.pqid); 674 st->act.dnpipe = ntohs(sp->pfs_1400.dnpipe); 675 st->act.dnrpipe = ntohs(sp->pfs_1400.dnrpipe); 676 st->act.rtableid = ntohl(sp->pfs_1400.rtableid); 677 st->act.min_ttl = sp->pfs_1400.min_ttl; 678 st->act.set_tos = sp->pfs_1400.set_tos; 679 st->act.max_mss = ntohs(sp->pfs_1400.max_mss); 680 st->act.set_prio[0] = sp->pfs_1400.set_prio[0]; 681 st->act.set_prio[1] = sp->pfs_1400.set_prio[1]; 682 st->rt = sp->pfs_1400.rt; 683 if (st->rt && (st->rt_kif = pfi_kkif_find(sp->pfs_1400.rt_ifname)) == NULL) { 684 if (V_pf_status.debug >= PF_DEBUG_MISC) 685 printf("%s: unknown route interface: %s\n", 686 __func__, sp->pfs_1400.rt_ifname); 687 if (flags & PFSYNC_SI_IOCTL) 688 error = EINVAL; 689 else 690 error = 0; 691 goto cleanup_keys; 692 } 693 break; 694 default: 695 panic("%s: Unsupported pfsync_msg_version %d", 696 __func__, msg_version); 697 } 698 699 st->id = sp->pfs_1301.id; 700 st->creatorid = sp->pfs_1301.creatorid; 701 pf_state_peer_ntoh(&sp->pfs_1301.src, &st->src); 702 pf_state_peer_ntoh(&sp->pfs_1301.dst, &st->dst); 703 704 st->rule.ptr = r; 705 st->nat_rule.ptr = NULL; 706 st->anchor.ptr = NULL; 707 708 st->pfsync_time = time_uptime; 709 st->sync_state = PFSYNC_S_NONE; 710 711 if (!(flags & PFSYNC_SI_IOCTL)) 712 st->state_flags |= PFSTATE_NOSYNC; 713 714 if ((error = pf_state_insert(kif, kif, skw, sks, st)) != 0) 715 goto cleanup_state; 716 717 /* XXX when we have nat_rule/anchors, use STATE_INC_COUNTERS */ 718 counter_u64_add(r->states_cur, 1); 719 counter_u64_add(r->states_tot, 1); 720 721 if (!(flags & PFSYNC_SI_IOCTL)) { 722 st->state_flags &= ~PFSTATE_NOSYNC; 723 if (st->state_flags & PFSTATE_ACK) { 724 struct pfsync_bucket *b = pfsync_get_bucket(sc, st); 725 PFSYNC_BUCKET_LOCK(b); 726 pfsync_q_ins(st, PFSYNC_S_IACK, true); 727 PFSYNC_BUCKET_UNLOCK(b); 728 729 pfsync_push_all(sc); 730 } 731 } 732 st->state_flags &= ~PFSTATE_ACK; 733 PF_STATE_UNLOCK(st); 734 735 return (0); 736 737 cleanup: 738 error = ENOMEM; 739 cleanup_keys: 740 if (skw == sks) 741 sks = NULL; 742 uma_zfree(V_pf_state_key_z, skw); 743 uma_zfree(V_pf_state_key_z, sks); 744 745 cleanup_state: /* pf_state_insert() frees the state keys. */ 746 if (st) { 747 st->timeout = PFTM_UNLINKED; /* appease an assert */ 748 pf_free_state(st); 749 } 750 return (error); 751 } 752 753 #ifdef INET 754 static int 755 pfsync_input(struct mbuf **mp, int *offp __unused, int proto __unused) 756 { 757 struct pfsync_softc *sc = V_pfsyncif; 758 struct mbuf *m = *mp; 759 struct ip *ip = mtod(m, struct ip *); 760 struct pfsync_header *ph; 761 struct pfsync_subheader subh; 762 763 int offset, len, flags = 0; 764 int rv; 765 uint16_t count; 766 767 PF_RULES_RLOCK_TRACKER; 768 769 *mp = NULL; 770 V_pfsyncstats.pfsyncs_ipackets++; 771 772 /* Verify that we have a sync interface configured. */ 773 if (!sc || !sc->sc_sync_if || !V_pf_status.running || 774 (sc->sc_ifp->if_drv_flags & IFF_DRV_RUNNING) == 0) 775 goto done; 776 777 /* verify that the packet came in on the right interface */ 778 if (sc->sc_sync_if != m->m_pkthdr.rcvif) { 779 V_pfsyncstats.pfsyncs_badif++; 780 goto done; 781 } 782 783 if_inc_counter(sc->sc_ifp, IFCOUNTER_IPACKETS, 1); 784 if_inc_counter(sc->sc_ifp, IFCOUNTER_IBYTES, m->m_pkthdr.len); 785 /* verify that the IP TTL is 255. */ 786 if (ip->ip_ttl != PFSYNC_DFLTTL) { 787 V_pfsyncstats.pfsyncs_badttl++; 788 goto done; 789 } 790 791 offset = ip->ip_hl << 2; 792 if (m->m_pkthdr.len < offset + sizeof(*ph)) { 793 V_pfsyncstats.pfsyncs_hdrops++; 794 goto done; 795 } 796 797 if (offset + sizeof(*ph) > m->m_len) { 798 if (m_pullup(m, offset + sizeof(*ph)) == NULL) { 799 V_pfsyncstats.pfsyncs_hdrops++; 800 return (IPPROTO_DONE); 801 } 802 ip = mtod(m, struct ip *); 803 } 804 ph = (struct pfsync_header *)((char *)ip + offset); 805 806 /* verify the version */ 807 if (ph->version != PFSYNC_VERSION) { 808 V_pfsyncstats.pfsyncs_badver++; 809 goto done; 810 } 811 812 len = ntohs(ph->len) + offset; 813 if (m->m_pkthdr.len < len) { 814 V_pfsyncstats.pfsyncs_badlen++; 815 goto done; 816 } 817 818 /* 819 * Trusting pf_chksum during packet processing, as well as seeking 820 * in interface name tree, require holding PF_RULES_RLOCK(). 821 */ 822 PF_RULES_RLOCK(); 823 if (!bcmp(&ph->pfcksum, &V_pf_status.pf_chksum, PF_MD5_DIGEST_LENGTH)) 824 flags = PFSYNC_SI_CKSUM; 825 826 offset += sizeof(*ph); 827 while (offset <= len - sizeof(subh)) { 828 m_copydata(m, offset, sizeof(subh), (caddr_t)&subh); 829 offset += sizeof(subh); 830 831 if (subh.action >= PFSYNC_ACT_MAX) { 832 V_pfsyncstats.pfsyncs_badact++; 833 PF_RULES_RUNLOCK(); 834 goto done; 835 } 836 837 count = ntohs(subh.count); 838 V_pfsyncstats.pfsyncs_iacts[subh.action] += count; 839 rv = (*pfsync_acts[subh.action])(m, offset, count, flags, subh.action); 840 if (rv == -1) { 841 PF_RULES_RUNLOCK(); 842 return (IPPROTO_DONE); 843 } 844 845 offset += rv; 846 } 847 PF_RULES_RUNLOCK(); 848 849 done: 850 m_freem(m); 851 return (IPPROTO_DONE); 852 } 853 #endif 854 855 #ifdef INET6 856 static int 857 pfsync6_input(struct mbuf **mp, int *offp __unused, int proto __unused) 858 { 859 struct pfsync_softc *sc = V_pfsyncif; 860 struct mbuf *m = *mp; 861 struct ip6_hdr *ip6 = mtod(m, struct ip6_hdr *); 862 struct pfsync_header *ph; 863 struct pfsync_subheader subh; 864 865 int offset, len, flags = 0; 866 int rv; 867 uint16_t count; 868 869 PF_RULES_RLOCK_TRACKER; 870 871 *mp = NULL; 872 V_pfsyncstats.pfsyncs_ipackets++; 873 874 /* Verify that we have a sync interface configured. */ 875 if (!sc || !sc->sc_sync_if || !V_pf_status.running || 876 (sc->sc_ifp->if_drv_flags & IFF_DRV_RUNNING) == 0) 877 goto done; 878 879 /* verify that the packet came in on the right interface */ 880 if (sc->sc_sync_if != m->m_pkthdr.rcvif) { 881 V_pfsyncstats.pfsyncs_badif++; 882 goto done; 883 } 884 885 if_inc_counter(sc->sc_ifp, IFCOUNTER_IPACKETS, 1); 886 if_inc_counter(sc->sc_ifp, IFCOUNTER_IBYTES, m->m_pkthdr.len); 887 /* verify that the IP TTL is 255. */ 888 if (ip6->ip6_hlim != PFSYNC_DFLTTL) { 889 V_pfsyncstats.pfsyncs_badttl++; 890 goto done; 891 } 892 893 894 offset = sizeof(*ip6); 895 if (m->m_pkthdr.len < offset + sizeof(*ph)) { 896 V_pfsyncstats.pfsyncs_hdrops++; 897 goto done; 898 } 899 900 if (offset + sizeof(*ph) > m->m_len) { 901 if (m_pullup(m, offset + sizeof(*ph)) == NULL) { 902 V_pfsyncstats.pfsyncs_hdrops++; 903 return (IPPROTO_DONE); 904 } 905 ip6 = mtod(m, struct ip6_hdr *); 906 } 907 ph = (struct pfsync_header *)((char *)ip6 + offset); 908 909 /* verify the version */ 910 if (ph->version != PFSYNC_VERSION) { 911 V_pfsyncstats.pfsyncs_badver++; 912 goto done; 913 } 914 915 len = ntohs(ph->len) + offset; 916 if (m->m_pkthdr.len < len) { 917 V_pfsyncstats.pfsyncs_badlen++; 918 goto done; 919 } 920 921 /* 922 * Trusting pf_chksum during packet processing, as well as seeking 923 * in interface name tree, require holding PF_RULES_RLOCK(). 924 */ 925 PF_RULES_RLOCK(); 926 if (!bcmp(&ph->pfcksum, &V_pf_status.pf_chksum, PF_MD5_DIGEST_LENGTH)) 927 flags = PFSYNC_SI_CKSUM; 928 929 offset += sizeof(*ph); 930 while (offset <= len - sizeof(subh)) { 931 m_copydata(m, offset, sizeof(subh), (caddr_t)&subh); 932 offset += sizeof(subh); 933 934 if (subh.action >= PFSYNC_ACT_MAX) { 935 V_pfsyncstats.pfsyncs_badact++; 936 PF_RULES_RUNLOCK(); 937 goto done; 938 } 939 940 count = ntohs(subh.count); 941 V_pfsyncstats.pfsyncs_iacts[subh.action] += count; 942 rv = (*pfsync_acts[subh.action])(m, offset, count, flags, subh.action); 943 if (rv == -1) { 944 PF_RULES_RUNLOCK(); 945 return (IPPROTO_DONE); 946 } 947 948 offset += rv; 949 } 950 PF_RULES_RUNLOCK(); 951 952 done: 953 m_freem(m); 954 return (IPPROTO_DONE); 955 } 956 #endif 957 958 static int 959 pfsync_in_clr(struct mbuf *m, int offset, int count, int flags, int action) 960 { 961 struct pfsync_clr *clr; 962 struct mbuf *mp; 963 int len = sizeof(*clr) * count; 964 int i, offp; 965 u_int32_t creatorid; 966 967 mp = m_pulldown(m, offset, len, &offp); 968 if (mp == NULL) { 969 V_pfsyncstats.pfsyncs_badlen++; 970 return (-1); 971 } 972 clr = (struct pfsync_clr *)(mp->m_data + offp); 973 974 for (i = 0; i < count; i++) { 975 creatorid = clr[i].creatorid; 976 977 if (clr[i].ifname[0] != '\0' && 978 pfi_kkif_find(clr[i].ifname) == NULL) 979 continue; 980 981 for (int i = 0; i <= pf_hashmask; i++) { 982 struct pf_idhash *ih = &V_pf_idhash[i]; 983 struct pf_kstate *s; 984 relock: 985 PF_HASHROW_LOCK(ih); 986 LIST_FOREACH(s, &ih->states, entry) { 987 if (s->creatorid == creatorid) { 988 s->state_flags |= PFSTATE_NOSYNC; 989 pf_unlink_state(s); 990 goto relock; 991 } 992 } 993 PF_HASHROW_UNLOCK(ih); 994 } 995 } 996 997 return (len); 998 } 999 1000 static int 1001 pfsync_in_ins(struct mbuf *m, int offset, int count, int flags, int action) 1002 { 1003 struct mbuf *mp; 1004 union pfsync_state_union *sa, *sp; 1005 int i, offp, len, msg_version; 1006 1007 switch (action) { 1008 case PFSYNC_ACT_INS_1301: 1009 len = sizeof(struct pfsync_state_1301) * count; 1010 msg_version = PFSYNC_MSG_VERSION_1301; 1011 break; 1012 case PFSYNC_ACT_INS_1400: 1013 len = sizeof(struct pfsync_state_1400) * count; 1014 msg_version = PFSYNC_MSG_VERSION_1400; 1015 break; 1016 default: 1017 V_pfsyncstats.pfsyncs_badact++; 1018 return (-1); 1019 } 1020 1021 mp = m_pulldown(m, offset, len, &offp); 1022 if (mp == NULL) { 1023 V_pfsyncstats.pfsyncs_badlen++; 1024 return (-1); 1025 } 1026 sa = (union pfsync_state_union *)(mp->m_data + offp); 1027 1028 for (i = 0; i < count; i++) { 1029 sp = &sa[i]; 1030 1031 /* Check for invalid values. */ 1032 if (sp->pfs_1301.timeout >= PFTM_MAX || 1033 sp->pfs_1301.src.state > PF_TCPS_PROXY_DST || 1034 sp->pfs_1301.dst.state > PF_TCPS_PROXY_DST || 1035 sp->pfs_1301.direction > PF_OUT || 1036 (sp->pfs_1301.af != AF_INET && 1037 sp->pfs_1301.af != AF_INET6)) { 1038 if (V_pf_status.debug >= PF_DEBUG_MISC) 1039 printf("%s: invalid value\n", __func__); 1040 V_pfsyncstats.pfsyncs_badval++; 1041 continue; 1042 } 1043 1044 if (pfsync_state_import(sp, flags, msg_version) == ENOMEM) 1045 /* Drop out, but process the rest of the actions. */ 1046 break; 1047 } 1048 1049 return (len); 1050 } 1051 1052 static int 1053 pfsync_in_iack(struct mbuf *m, int offset, int count, int flags, int action) 1054 { 1055 struct pfsync_ins_ack *ia, *iaa; 1056 struct pf_kstate *st; 1057 1058 struct mbuf *mp; 1059 int len = count * sizeof(*ia); 1060 int offp, i; 1061 1062 mp = m_pulldown(m, offset, len, &offp); 1063 if (mp == NULL) { 1064 V_pfsyncstats.pfsyncs_badlen++; 1065 return (-1); 1066 } 1067 iaa = (struct pfsync_ins_ack *)(mp->m_data + offp); 1068 1069 for (i = 0; i < count; i++) { 1070 ia = &iaa[i]; 1071 1072 st = pf_find_state_byid(ia->id, ia->creatorid); 1073 if (st == NULL) 1074 continue; 1075 1076 if (st->state_flags & PFSTATE_ACK) { 1077 pfsync_undefer_state(st, 0); 1078 } 1079 PF_STATE_UNLOCK(st); 1080 } 1081 /* 1082 * XXX this is not yet implemented, but we know the size of the 1083 * message so we can skip it. 1084 */ 1085 1086 return (count * sizeof(struct pfsync_ins_ack)); 1087 } 1088 1089 static int 1090 pfsync_upd_tcp(struct pf_kstate *st, struct pfsync_state_peer *src, 1091 struct pfsync_state_peer *dst) 1092 { 1093 int sync = 0; 1094 1095 PF_STATE_LOCK_ASSERT(st); 1096 1097 /* 1098 * The state should never go backwards except 1099 * for syn-proxy states. Neither should the 1100 * sequence window slide backwards. 1101 */ 1102 if ((st->src.state > src->state && 1103 (st->src.state < PF_TCPS_PROXY_SRC || 1104 src->state >= PF_TCPS_PROXY_SRC)) || 1105 1106 (st->src.state == src->state && 1107 SEQ_GT(st->src.seqlo, ntohl(src->seqlo)))) 1108 sync++; 1109 else 1110 pf_state_peer_ntoh(src, &st->src); 1111 1112 if ((st->dst.state > dst->state) || 1113 1114 (st->dst.state >= TCPS_SYN_SENT && 1115 SEQ_GT(st->dst.seqlo, ntohl(dst->seqlo)))) 1116 sync++; 1117 else 1118 pf_state_peer_ntoh(dst, &st->dst); 1119 1120 return (sync); 1121 } 1122 1123 static int 1124 pfsync_in_upd(struct mbuf *m, int offset, int count, int flags, int action) 1125 { 1126 struct pfsync_softc *sc = V_pfsyncif; 1127 union pfsync_state_union *sa, *sp; 1128 struct pf_kstate *st; 1129 struct mbuf *mp; 1130 int sync, offp, i, len, msg_version; 1131 1132 switch (action) { 1133 case PFSYNC_ACT_UPD_1301: 1134 len = sizeof(struct pfsync_state_1301) * count; 1135 msg_version = PFSYNC_MSG_VERSION_1301; 1136 break; 1137 case PFSYNC_ACT_UPD_1400: 1138 len = sizeof(struct pfsync_state_1400) * count; 1139 msg_version = PFSYNC_MSG_VERSION_1400; 1140 break; 1141 default: 1142 V_pfsyncstats.pfsyncs_badact++; 1143 return (-1); 1144 } 1145 1146 mp = m_pulldown(m, offset, len, &offp); 1147 if (mp == NULL) { 1148 V_pfsyncstats.pfsyncs_badlen++; 1149 return (-1); 1150 } 1151 sa = (union pfsync_state_union *)(mp->m_data + offp); 1152 1153 for (i = 0; i < count; i++) { 1154 sp = &sa[i]; 1155 1156 /* check for invalid values */ 1157 if (sp->pfs_1301.timeout >= PFTM_MAX || 1158 sp->pfs_1301.src.state > PF_TCPS_PROXY_DST || 1159 sp->pfs_1301.dst.state > PF_TCPS_PROXY_DST) { 1160 if (V_pf_status.debug >= PF_DEBUG_MISC) { 1161 printf("pfsync_input: PFSYNC_ACT_UPD: " 1162 "invalid value\n"); 1163 } 1164 V_pfsyncstats.pfsyncs_badval++; 1165 continue; 1166 } 1167 1168 st = pf_find_state_byid(sp->pfs_1301.id, sp->pfs_1301.creatorid); 1169 if (st == NULL) { 1170 /* insert the update */ 1171 if (pfsync_state_import(sp, flags, msg_version)) 1172 V_pfsyncstats.pfsyncs_badstate++; 1173 continue; 1174 } 1175 1176 if (st->state_flags & PFSTATE_ACK) { 1177 pfsync_undefer_state(st, 1); 1178 } 1179 1180 if (st->key[PF_SK_WIRE]->proto == IPPROTO_TCP) 1181 sync = pfsync_upd_tcp(st, &sp->pfs_1301.src, &sp->pfs_1301.dst); 1182 else { 1183 sync = 0; 1184 1185 /* 1186 * Non-TCP protocol state machine always go 1187 * forwards 1188 */ 1189 if (st->src.state > sp->pfs_1301.src.state) 1190 sync++; 1191 else 1192 pf_state_peer_ntoh(&sp->pfs_1301.src, &st->src); 1193 if (st->dst.state > sp->pfs_1301.dst.state) 1194 sync++; 1195 else 1196 pf_state_peer_ntoh(&sp->pfs_1301.dst, &st->dst); 1197 } 1198 if (sync < 2) { 1199 pfsync_alloc_scrub_memory(&sp->pfs_1301.dst, &st->dst); 1200 pf_state_peer_ntoh(&sp->pfs_1301.dst, &st->dst); 1201 st->expire = time_uptime; 1202 st->timeout = sp->pfs_1301.timeout; 1203 } 1204 st->pfsync_time = time_uptime; 1205 1206 if (sync) { 1207 V_pfsyncstats.pfsyncs_stale++; 1208 1209 pfsync_update_state(st); 1210 PF_STATE_UNLOCK(st); 1211 pfsync_push_all(sc); 1212 continue; 1213 } 1214 PF_STATE_UNLOCK(st); 1215 } 1216 1217 return (len); 1218 } 1219 1220 static int 1221 pfsync_in_upd_c(struct mbuf *m, int offset, int count, int flags, int action) 1222 { 1223 struct pfsync_softc *sc = V_pfsyncif; 1224 struct pfsync_upd_c *ua, *up; 1225 struct pf_kstate *st; 1226 int len = count * sizeof(*up); 1227 int sync; 1228 struct mbuf *mp; 1229 int offp, i; 1230 1231 mp = m_pulldown(m, offset, len, &offp); 1232 if (mp == NULL) { 1233 V_pfsyncstats.pfsyncs_badlen++; 1234 return (-1); 1235 } 1236 ua = (struct pfsync_upd_c *)(mp->m_data + offp); 1237 1238 for (i = 0; i < count; i++) { 1239 up = &ua[i]; 1240 1241 /* check for invalid values */ 1242 if (up->timeout >= PFTM_MAX || 1243 up->src.state > PF_TCPS_PROXY_DST || 1244 up->dst.state > PF_TCPS_PROXY_DST) { 1245 if (V_pf_status.debug >= PF_DEBUG_MISC) { 1246 printf("pfsync_input: " 1247 "PFSYNC_ACT_UPD_C: " 1248 "invalid value\n"); 1249 } 1250 V_pfsyncstats.pfsyncs_badval++; 1251 continue; 1252 } 1253 1254 st = pf_find_state_byid(up->id, up->creatorid); 1255 if (st == NULL) { 1256 /* We don't have this state. Ask for it. */ 1257 PFSYNC_BUCKET_LOCK(&sc->sc_buckets[0]); 1258 pfsync_request_update(up->creatorid, up->id); 1259 PFSYNC_BUCKET_UNLOCK(&sc->sc_buckets[0]); 1260 continue; 1261 } 1262 1263 if (st->state_flags & PFSTATE_ACK) { 1264 pfsync_undefer_state(st, 1); 1265 } 1266 1267 if (st->key[PF_SK_WIRE]->proto == IPPROTO_TCP) 1268 sync = pfsync_upd_tcp(st, &up->src, &up->dst); 1269 else { 1270 sync = 0; 1271 1272 /* 1273 * Non-TCP protocol state machine always go 1274 * forwards 1275 */ 1276 if (st->src.state > up->src.state) 1277 sync++; 1278 else 1279 pf_state_peer_ntoh(&up->src, &st->src); 1280 if (st->dst.state > up->dst.state) 1281 sync++; 1282 else 1283 pf_state_peer_ntoh(&up->dst, &st->dst); 1284 } 1285 if (sync < 2) { 1286 pfsync_alloc_scrub_memory(&up->dst, &st->dst); 1287 pf_state_peer_ntoh(&up->dst, &st->dst); 1288 st->expire = time_uptime; 1289 st->timeout = up->timeout; 1290 } 1291 st->pfsync_time = time_uptime; 1292 1293 if (sync) { 1294 V_pfsyncstats.pfsyncs_stale++; 1295 1296 pfsync_update_state(st); 1297 PF_STATE_UNLOCK(st); 1298 pfsync_push_all(sc); 1299 continue; 1300 } 1301 PF_STATE_UNLOCK(st); 1302 } 1303 1304 return (len); 1305 } 1306 1307 static int 1308 pfsync_in_ureq(struct mbuf *m, int offset, int count, int flags, int action) 1309 { 1310 struct pfsync_upd_req *ur, *ura; 1311 struct mbuf *mp; 1312 int len = count * sizeof(*ur); 1313 int i, offp; 1314 1315 struct pf_kstate *st; 1316 1317 mp = m_pulldown(m, offset, len, &offp); 1318 if (mp == NULL) { 1319 V_pfsyncstats.pfsyncs_badlen++; 1320 return (-1); 1321 } 1322 ura = (struct pfsync_upd_req *)(mp->m_data + offp); 1323 1324 for (i = 0; i < count; i++) { 1325 ur = &ura[i]; 1326 1327 if (ur->id == 0 && ur->creatorid == 0) 1328 pfsync_bulk_start(); 1329 else { 1330 st = pf_find_state_byid(ur->id, ur->creatorid); 1331 if (st == NULL) { 1332 V_pfsyncstats.pfsyncs_badstate++; 1333 continue; 1334 } 1335 if (st->state_flags & PFSTATE_NOSYNC) { 1336 PF_STATE_UNLOCK(st); 1337 continue; 1338 } 1339 1340 pfsync_update_state_req(st); 1341 PF_STATE_UNLOCK(st); 1342 } 1343 } 1344 1345 return (len); 1346 } 1347 1348 static int 1349 pfsync_in_del_c(struct mbuf *m, int offset, int count, int flags, int action) 1350 { 1351 struct mbuf *mp; 1352 struct pfsync_del_c *sa, *sp; 1353 struct pf_kstate *st; 1354 int len = count * sizeof(*sp); 1355 int offp, i; 1356 1357 mp = m_pulldown(m, offset, len, &offp); 1358 if (mp == NULL) { 1359 V_pfsyncstats.pfsyncs_badlen++; 1360 return (-1); 1361 } 1362 sa = (struct pfsync_del_c *)(mp->m_data + offp); 1363 1364 for (i = 0; i < count; i++) { 1365 sp = &sa[i]; 1366 1367 st = pf_find_state_byid(sp->id, sp->creatorid); 1368 if (st == NULL) { 1369 V_pfsyncstats.pfsyncs_badstate++; 1370 continue; 1371 } 1372 1373 st->state_flags |= PFSTATE_NOSYNC; 1374 pf_unlink_state(st); 1375 } 1376 1377 return (len); 1378 } 1379 1380 static int 1381 pfsync_in_bus(struct mbuf *m, int offset, int count, int flags, int action) 1382 { 1383 struct pfsync_softc *sc = V_pfsyncif; 1384 struct pfsync_bus *bus; 1385 struct mbuf *mp; 1386 int len = count * sizeof(*bus); 1387 int offp; 1388 1389 PFSYNC_BLOCK(sc); 1390 1391 /* If we're not waiting for a bulk update, who cares. */ 1392 if (sc->sc_ureq_sent == 0) { 1393 PFSYNC_BUNLOCK(sc); 1394 return (len); 1395 } 1396 1397 mp = m_pulldown(m, offset, len, &offp); 1398 if (mp == NULL) { 1399 PFSYNC_BUNLOCK(sc); 1400 V_pfsyncstats.pfsyncs_badlen++; 1401 return (-1); 1402 } 1403 bus = (struct pfsync_bus *)(mp->m_data + offp); 1404 1405 switch (bus->status) { 1406 case PFSYNC_BUS_START: 1407 callout_reset(&sc->sc_bulkfail_tmo, 4 * hz + 1408 V_pf_limits[PF_LIMIT_STATES].limit / 1409 ((sc->sc_ifp->if_mtu - PFSYNC_MINPKT) / 1410 sizeof(union pfsync_state_union)), 1411 pfsync_bulk_fail, sc); 1412 if (V_pf_status.debug >= PF_DEBUG_MISC) 1413 printf("pfsync: received bulk update start\n"); 1414 break; 1415 1416 case PFSYNC_BUS_END: 1417 if (time_uptime - ntohl(bus->endtime) >= 1418 sc->sc_ureq_sent) { 1419 /* that's it, we're happy */ 1420 sc->sc_ureq_sent = 0; 1421 sc->sc_bulk_tries = 0; 1422 callout_stop(&sc->sc_bulkfail_tmo); 1423 if (!(sc->sc_flags & PFSYNCF_OK) && carp_demote_adj_p) 1424 (*carp_demote_adj_p)(-V_pfsync_carp_adj, 1425 "pfsync bulk done"); 1426 sc->sc_flags |= PFSYNCF_OK; 1427 if (V_pf_status.debug >= PF_DEBUG_MISC) 1428 printf("pfsync: received valid " 1429 "bulk update end\n"); 1430 } else { 1431 if (V_pf_status.debug >= PF_DEBUG_MISC) 1432 printf("pfsync: received invalid " 1433 "bulk update end: bad timestamp\n"); 1434 } 1435 break; 1436 } 1437 PFSYNC_BUNLOCK(sc); 1438 1439 return (len); 1440 } 1441 1442 static int 1443 pfsync_in_tdb(struct mbuf *m, int offset, int count, int flags, int action) 1444 { 1445 int len = count * sizeof(struct pfsync_tdb); 1446 1447 #if defined(IPSEC) 1448 struct pfsync_tdb *tp; 1449 struct mbuf *mp; 1450 int offp; 1451 int i; 1452 int s; 1453 1454 mp = m_pulldown(m, offset, len, &offp); 1455 if (mp == NULL) { 1456 V_pfsyncstats.pfsyncs_badlen++; 1457 return (-1); 1458 } 1459 tp = (struct pfsync_tdb *)(mp->m_data + offp); 1460 1461 for (i = 0; i < count; i++) 1462 pfsync_update_net_tdb(&tp[i]); 1463 #endif 1464 1465 return (len); 1466 } 1467 1468 #if defined(IPSEC) 1469 /* Update an in-kernel tdb. Silently fail if no tdb is found. */ 1470 static void 1471 pfsync_update_net_tdb(struct pfsync_tdb *pt) 1472 { 1473 struct tdb *tdb; 1474 int s; 1475 1476 /* check for invalid values */ 1477 if (ntohl(pt->spi) <= SPI_RESERVED_MAX || 1478 (pt->dst.sa.sa_family != AF_INET && 1479 pt->dst.sa.sa_family != AF_INET6)) 1480 goto bad; 1481 1482 tdb = gettdb(pt->spi, &pt->dst, pt->sproto); 1483 if (tdb) { 1484 pt->rpl = ntohl(pt->rpl); 1485 pt->cur_bytes = (unsigned long long)be64toh(pt->cur_bytes); 1486 1487 /* Neither replay nor byte counter should ever decrease. */ 1488 if (pt->rpl < tdb->tdb_rpl || 1489 pt->cur_bytes < tdb->tdb_cur_bytes) { 1490 goto bad; 1491 } 1492 1493 tdb->tdb_rpl = pt->rpl; 1494 tdb->tdb_cur_bytes = pt->cur_bytes; 1495 } 1496 return; 1497 1498 bad: 1499 if (V_pf_status.debug >= PF_DEBUG_MISC) 1500 printf("pfsync_insert: PFSYNC_ACT_TDB_UPD: " 1501 "invalid value\n"); 1502 V_pfsyncstats.pfsyncs_badstate++; 1503 return; 1504 } 1505 #endif 1506 1507 static int 1508 pfsync_in_eof(struct mbuf *m, int offset, int count, int flags, int action) 1509 { 1510 /* check if we are at the right place in the packet */ 1511 if (offset != m->m_pkthdr.len) 1512 V_pfsyncstats.pfsyncs_badlen++; 1513 1514 /* we're done. free and let the caller return */ 1515 m_freem(m); 1516 return (-1); 1517 } 1518 1519 static int 1520 pfsync_in_error(struct mbuf *m, int offset, int count, int flags, int action) 1521 { 1522 V_pfsyncstats.pfsyncs_badact++; 1523 1524 m_freem(m); 1525 return (-1); 1526 } 1527 1528 static int 1529 pfsyncoutput(struct ifnet *ifp, struct mbuf *m, const struct sockaddr *dst, 1530 struct route *rt) 1531 { 1532 m_freem(m); 1533 return (0); 1534 } 1535 1536 /* ARGSUSED */ 1537 static int 1538 pfsyncioctl(struct ifnet *ifp, u_long cmd, caddr_t data) 1539 { 1540 struct pfsync_softc *sc = ifp->if_softc; 1541 struct ifreq *ifr = (struct ifreq *)data; 1542 struct pfsyncreq pfsyncr; 1543 size_t nvbuflen; 1544 int error; 1545 int c; 1546 1547 switch (cmd) { 1548 case SIOCSIFFLAGS: 1549 PFSYNC_LOCK(sc); 1550 if (ifp->if_flags & IFF_UP) { 1551 ifp->if_drv_flags |= IFF_DRV_RUNNING; 1552 PFSYNC_UNLOCK(sc); 1553 pfsync_pointers_init(); 1554 } else { 1555 ifp->if_drv_flags &= ~IFF_DRV_RUNNING; 1556 PFSYNC_UNLOCK(sc); 1557 pfsync_pointers_uninit(); 1558 } 1559 break; 1560 case SIOCSIFMTU: 1561 if (!sc->sc_sync_if || 1562 ifr->ifr_mtu <= PFSYNC_MINPKT || 1563 ifr->ifr_mtu > sc->sc_sync_if->if_mtu) 1564 return (EINVAL); 1565 if (ifr->ifr_mtu < ifp->if_mtu) { 1566 for (c = 0; c < pfsync_buckets; c++) { 1567 PFSYNC_BUCKET_LOCK(&sc->sc_buckets[c]); 1568 if (sc->sc_buckets[c].b_len > PFSYNC_MINPKT) 1569 pfsync_sendout(1, c); 1570 PFSYNC_BUCKET_UNLOCK(&sc->sc_buckets[c]); 1571 } 1572 } 1573 ifp->if_mtu = ifr->ifr_mtu; 1574 break; 1575 case SIOCGETPFSYNC: 1576 bzero(&pfsyncr, sizeof(pfsyncr)); 1577 PFSYNC_LOCK(sc); 1578 if (sc->sc_sync_if) { 1579 strlcpy(pfsyncr.pfsyncr_syncdev, 1580 sc->sc_sync_if->if_xname, IFNAMSIZ); 1581 } 1582 pfsyncr.pfsyncr_syncpeer = ((struct sockaddr_in *)&sc->sc_sync_peer)->sin_addr; 1583 pfsyncr.pfsyncr_maxupdates = sc->sc_maxupdates; 1584 pfsyncr.pfsyncr_defer = sc->sc_flags; 1585 PFSYNC_UNLOCK(sc); 1586 return (copyout(&pfsyncr, ifr_data_get_ptr(ifr), 1587 sizeof(pfsyncr))); 1588 1589 case SIOCGETPFSYNCNV: 1590 { 1591 nvlist_t *nvl_syncpeer; 1592 nvlist_t *nvl = nvlist_create(0); 1593 1594 if (nvl == NULL) 1595 return (ENOMEM); 1596 1597 if (sc->sc_sync_if) 1598 nvlist_add_string(nvl, "syncdev", sc->sc_sync_if->if_xname); 1599 nvlist_add_number(nvl, "maxupdates", sc->sc_maxupdates); 1600 nvlist_add_number(nvl, "flags", sc->sc_flags); 1601 nvlist_add_number(nvl, "version", sc->sc_version); 1602 if ((nvl_syncpeer = pfsync_sockaddr_to_syncpeer_nvlist(&sc->sc_sync_peer)) != NULL) 1603 nvlist_add_nvlist(nvl, "syncpeer", nvl_syncpeer); 1604 1605 void *packed = NULL; 1606 packed = nvlist_pack(nvl, &nvbuflen); 1607 if (packed == NULL) { 1608 free(packed, M_NVLIST); 1609 nvlist_destroy(nvl); 1610 return (ENOMEM); 1611 } 1612 1613 if (nvbuflen > ifr->ifr_cap_nv.buf_length) { 1614 ifr->ifr_cap_nv.length = nvbuflen; 1615 ifr->ifr_cap_nv.buffer = NULL; 1616 free(packed, M_NVLIST); 1617 nvlist_destroy(nvl); 1618 return (EFBIG); 1619 } 1620 1621 ifr->ifr_cap_nv.length = nvbuflen; 1622 error = copyout(packed, ifr->ifr_cap_nv.buffer, nvbuflen); 1623 1624 nvlist_destroy(nvl); 1625 nvlist_destroy(nvl_syncpeer); 1626 free(packed, M_NVLIST); 1627 break; 1628 } 1629 1630 case SIOCSETPFSYNC: 1631 { 1632 struct pfsync_kstatus status; 1633 1634 if ((error = priv_check(curthread, PRIV_NETINET_PF)) != 0) 1635 return (error); 1636 if ((error = copyin(ifr_data_get_ptr(ifr), &pfsyncr, 1637 sizeof(pfsyncr)))) 1638 return (error); 1639 1640 memset((char *)&status, 0, sizeof(struct pfsync_kstatus)); 1641 pfsync_pfsyncreq_to_kstatus(&pfsyncr, &status); 1642 1643 error = pfsync_kstatus_to_softc(&status, sc); 1644 return (error); 1645 } 1646 case SIOCSETPFSYNCNV: 1647 { 1648 struct pfsync_kstatus status; 1649 void *data; 1650 nvlist_t *nvl; 1651 1652 if ((error = priv_check(curthread, PRIV_NETINET_PF)) != 0) 1653 return (error); 1654 if (ifr->ifr_cap_nv.length > IFR_CAP_NV_MAXBUFSIZE) 1655 return (EINVAL); 1656 1657 data = malloc(ifr->ifr_cap_nv.length, M_TEMP, M_WAITOK); 1658 1659 if ((error = copyin(ifr->ifr_cap_nv.buffer, data, 1660 ifr->ifr_cap_nv.length)) != 0) { 1661 free(data, M_TEMP); 1662 return (error); 1663 } 1664 1665 if ((nvl = nvlist_unpack(data, ifr->ifr_cap_nv.length, 0)) == NULL) { 1666 free(data, M_TEMP); 1667 return (EINVAL); 1668 } 1669 1670 memset((char *)&status, 0, sizeof(struct pfsync_kstatus)); 1671 pfsync_nvstatus_to_kstatus(nvl, &status); 1672 1673 nvlist_destroy(nvl); 1674 free(data, M_TEMP); 1675 1676 error = pfsync_kstatus_to_softc(&status, sc); 1677 return (error); 1678 } 1679 default: 1680 return (ENOTTY); 1681 } 1682 1683 return (0); 1684 } 1685 1686 static void 1687 pfsync_out_state_1301(struct pf_kstate *st, void *buf) 1688 { 1689 union pfsync_state_union *sp = buf; 1690 1691 pfsync_state_export(sp, st, PFSYNC_MSG_VERSION_1301); 1692 } 1693 1694 static void 1695 pfsync_out_state_1400(struct pf_kstate *st, void *buf) 1696 { 1697 union pfsync_state_union *sp = buf; 1698 1699 pfsync_state_export(sp, st, PFSYNC_MSG_VERSION_1400); 1700 } 1701 1702 static void 1703 pfsync_out_iack(struct pf_kstate *st, void *buf) 1704 { 1705 struct pfsync_ins_ack *iack = buf; 1706 1707 iack->id = st->id; 1708 iack->creatorid = st->creatorid; 1709 } 1710 1711 static void 1712 pfsync_out_upd_c(struct pf_kstate *st, void *buf) 1713 { 1714 struct pfsync_upd_c *up = buf; 1715 1716 bzero(up, sizeof(*up)); 1717 up->id = st->id; 1718 pf_state_peer_hton(&st->src, &up->src); 1719 pf_state_peer_hton(&st->dst, &up->dst); 1720 up->creatorid = st->creatorid; 1721 up->timeout = st->timeout; 1722 } 1723 1724 static void 1725 pfsync_out_del_c(struct pf_kstate *st, void *buf) 1726 { 1727 struct pfsync_del_c *dp = buf; 1728 1729 dp->id = st->id; 1730 dp->creatorid = st->creatorid; 1731 st->state_flags |= PFSTATE_NOSYNC; 1732 } 1733 1734 static void 1735 pfsync_drop(struct pfsync_softc *sc) 1736 { 1737 struct pf_kstate *st, *next; 1738 struct pfsync_upd_req_item *ur; 1739 struct pfsync_bucket *b; 1740 int c; 1741 enum pfsync_q_id q; 1742 1743 for (c = 0; c < pfsync_buckets; c++) { 1744 b = &sc->sc_buckets[c]; 1745 for (q = 0; q < PFSYNC_Q_COUNT; q++) { 1746 if (TAILQ_EMPTY(&b->b_qs[q])) 1747 continue; 1748 1749 TAILQ_FOREACH_SAFE(st, &b->b_qs[q], sync_list, next) { 1750 KASSERT(st->sync_state == pfsync_qid_sstate[q], 1751 ("%s: st->sync_state == q", 1752 __func__)); 1753 st->sync_state = PFSYNC_S_NONE; 1754 pf_release_state(st); 1755 } 1756 TAILQ_INIT(&b->b_qs[q]); 1757 } 1758 1759 while ((ur = TAILQ_FIRST(&b->b_upd_req_list)) != NULL) { 1760 TAILQ_REMOVE(&b->b_upd_req_list, ur, ur_entry); 1761 free(ur, M_PFSYNC); 1762 } 1763 1764 b->b_len = PFSYNC_MINPKT; 1765 b->b_plus = NULL; 1766 } 1767 } 1768 1769 static void 1770 pfsync_sendout(int schedswi, int c) 1771 { 1772 struct pfsync_softc *sc = V_pfsyncif; 1773 struct ifnet *ifp = sc->sc_ifp; 1774 struct mbuf *m; 1775 struct pfsync_header *ph; 1776 struct pfsync_subheader *subh; 1777 struct pf_kstate *st, *st_next; 1778 struct pfsync_upd_req_item *ur; 1779 struct pfsync_bucket *b = &sc->sc_buckets[c]; 1780 int aflen, offset, count = 0; 1781 enum pfsync_q_id q; 1782 1783 KASSERT(sc != NULL, ("%s: null sc", __func__)); 1784 KASSERT(b->b_len > PFSYNC_MINPKT, 1785 ("%s: sc_len %zu", __func__, b->b_len)); 1786 PFSYNC_BUCKET_LOCK_ASSERT(b); 1787 1788 if (ifp->if_bpf == NULL && sc->sc_sync_if == NULL) { 1789 pfsync_drop(sc); 1790 return; 1791 } 1792 1793 m = m_get2(max_linkhdr + b->b_len, M_NOWAIT, MT_DATA, M_PKTHDR); 1794 if (m == NULL) { 1795 if_inc_counter(sc->sc_ifp, IFCOUNTER_OERRORS, 1); 1796 V_pfsyncstats.pfsyncs_onomem++; 1797 return; 1798 } 1799 m->m_data += max_linkhdr; 1800 m->m_len = m->m_pkthdr.len = b->b_len; 1801 1802 /* build the ip header */ 1803 switch (sc->sc_sync_peer.ss_family) { 1804 #ifdef INET 1805 case AF_INET: 1806 { 1807 struct ip *ip; 1808 1809 ip = mtod(m, struct ip *); 1810 bcopy(&sc->sc_template.ipv4, ip, sizeof(*ip)); 1811 aflen = offset = sizeof(*ip); 1812 1813 ip->ip_len = htons(m->m_pkthdr.len); 1814 ip_fillid(ip); 1815 break; 1816 } 1817 #endif 1818 #ifdef INET6 1819 case AF_INET6: 1820 { 1821 struct ip6_hdr *ip6; 1822 1823 ip6 = mtod(m, struct ip6_hdr *); 1824 bcopy(&sc->sc_template.ipv6, ip6, sizeof(*ip6)); 1825 aflen = offset = sizeof(*ip6); 1826 1827 ip6->ip6_plen = htons(m->m_pkthdr.len); 1828 break; 1829 } 1830 #endif 1831 default: 1832 m_freem(m); 1833 return; 1834 } 1835 1836 /* build the pfsync header */ 1837 ph = (struct pfsync_header *)(m->m_data + offset); 1838 bzero(ph, sizeof(*ph)); 1839 offset += sizeof(*ph); 1840 1841 ph->version = PFSYNC_VERSION; 1842 ph->len = htons(b->b_len - aflen); 1843 bcopy(V_pf_status.pf_chksum, ph->pfcksum, PF_MD5_DIGEST_LENGTH); 1844 1845 /* walk the queues */ 1846 for (q = 0; q < PFSYNC_Q_COUNT; q++) { 1847 if (TAILQ_EMPTY(&b->b_qs[q])) 1848 continue; 1849 1850 subh = (struct pfsync_subheader *)(m->m_data + offset); 1851 offset += sizeof(*subh); 1852 1853 count = 0; 1854 TAILQ_FOREACH_SAFE(st, &b->b_qs[q], sync_list, st_next) { 1855 KASSERT(st->sync_state == pfsync_qid_sstate[q], 1856 ("%s: st->sync_state == q", 1857 __func__)); 1858 /* 1859 * XXXGL: some of write methods do unlocked reads 1860 * of state data :( 1861 */ 1862 pfsync_qs[q].write(st, m->m_data + offset); 1863 offset += pfsync_qs[q].len; 1864 st->sync_state = PFSYNC_S_NONE; 1865 pf_release_state(st); 1866 count++; 1867 } 1868 TAILQ_INIT(&b->b_qs[q]); 1869 1870 bzero(subh, sizeof(*subh)); 1871 subh->action = pfsync_qs[q].action; 1872 subh->count = htons(count); 1873 V_pfsyncstats.pfsyncs_oacts[pfsync_qs[q].action] += count; 1874 } 1875 1876 if (!TAILQ_EMPTY(&b->b_upd_req_list)) { 1877 subh = (struct pfsync_subheader *)(m->m_data + offset); 1878 offset += sizeof(*subh); 1879 1880 count = 0; 1881 while ((ur = TAILQ_FIRST(&b->b_upd_req_list)) != NULL) { 1882 TAILQ_REMOVE(&b->b_upd_req_list, ur, ur_entry); 1883 1884 bcopy(&ur->ur_msg, m->m_data + offset, 1885 sizeof(ur->ur_msg)); 1886 offset += sizeof(ur->ur_msg); 1887 free(ur, M_PFSYNC); 1888 count++; 1889 } 1890 1891 bzero(subh, sizeof(*subh)); 1892 subh->action = PFSYNC_ACT_UPD_REQ; 1893 subh->count = htons(count); 1894 V_pfsyncstats.pfsyncs_oacts[PFSYNC_ACT_UPD_REQ] += count; 1895 } 1896 1897 /* has someone built a custom region for us to add? */ 1898 if (b->b_plus != NULL) { 1899 bcopy(b->b_plus, m->m_data + offset, b->b_pluslen); 1900 offset += b->b_pluslen; 1901 1902 b->b_plus = NULL; 1903 } 1904 1905 subh = (struct pfsync_subheader *)(m->m_data + offset); 1906 offset += sizeof(*subh); 1907 1908 bzero(subh, sizeof(*subh)); 1909 subh->action = PFSYNC_ACT_EOF; 1910 subh->count = htons(1); 1911 V_pfsyncstats.pfsyncs_oacts[PFSYNC_ACT_EOF]++; 1912 1913 /* we're done, let's put it on the wire */ 1914 if (ifp->if_bpf) { 1915 m->m_data += aflen; 1916 m->m_len = m->m_pkthdr.len = b->b_len - aflen; 1917 BPF_MTAP(ifp, m); 1918 m->m_data -= aflen; 1919 m->m_len = m->m_pkthdr.len = b->b_len; 1920 } 1921 1922 if (sc->sc_sync_if == NULL) { 1923 b->b_len = PFSYNC_MINPKT; 1924 m_freem(m); 1925 return; 1926 } 1927 1928 if_inc_counter(sc->sc_ifp, IFCOUNTER_OPACKETS, 1); 1929 if_inc_counter(sc->sc_ifp, IFCOUNTER_OBYTES, m->m_pkthdr.len); 1930 b->b_len = PFSYNC_MINPKT; 1931 1932 if (!_IF_QFULL(&b->b_snd)) 1933 _IF_ENQUEUE(&b->b_snd, m); 1934 else { 1935 m_freem(m); 1936 if_inc_counter(sc->sc_ifp, IFCOUNTER_OQDROPS, 1); 1937 } 1938 if (schedswi) 1939 swi_sched(V_pfsync_swi_cookie, 0); 1940 } 1941 1942 static void 1943 pfsync_insert_state(struct pf_kstate *st) 1944 { 1945 struct pfsync_softc *sc = V_pfsyncif; 1946 struct pfsync_bucket *b = pfsync_get_bucket(sc, st); 1947 1948 if (st->state_flags & PFSTATE_NOSYNC) 1949 return; 1950 1951 if ((st->rule.ptr->rule_flag & PFRULE_NOSYNC) || 1952 st->key[PF_SK_WIRE]->proto == IPPROTO_PFSYNC) { 1953 st->state_flags |= PFSTATE_NOSYNC; 1954 return; 1955 } 1956 1957 KASSERT(st->sync_state == PFSYNC_S_NONE, 1958 ("%s: st->sync_state %u", __func__, st->sync_state)); 1959 1960 PFSYNC_BUCKET_LOCK(b); 1961 if (b->b_len == PFSYNC_MINPKT) 1962 callout_reset(&b->b_tmo, 1 * hz, pfsync_timeout, b); 1963 1964 pfsync_q_ins(st, PFSYNC_S_INS, true); 1965 PFSYNC_BUCKET_UNLOCK(b); 1966 1967 st->sync_updates = 0; 1968 } 1969 1970 static int 1971 pfsync_defer(struct pf_kstate *st, struct mbuf *m) 1972 { 1973 struct pfsync_softc *sc = V_pfsyncif; 1974 struct pfsync_deferral *pd; 1975 struct pfsync_bucket *b; 1976 1977 if (m->m_flags & (M_BCAST|M_MCAST)) 1978 return (0); 1979 1980 if (sc == NULL) 1981 return (0); 1982 1983 b = pfsync_get_bucket(sc, st); 1984 1985 PFSYNC_LOCK(sc); 1986 1987 if (!(sc->sc_ifp->if_drv_flags & IFF_DRV_RUNNING) || 1988 !(sc->sc_flags & PFSYNCF_DEFER)) { 1989 PFSYNC_UNLOCK(sc); 1990 return (0); 1991 } 1992 1993 PFSYNC_BUCKET_LOCK(b); 1994 PFSYNC_UNLOCK(sc); 1995 1996 if (b->b_deferred >= 128) 1997 pfsync_undefer(TAILQ_FIRST(&b->b_deferrals), 0); 1998 1999 pd = malloc(sizeof(*pd), M_PFSYNC, M_NOWAIT); 2000 if (pd == NULL) { 2001 PFSYNC_BUCKET_UNLOCK(b); 2002 return (0); 2003 } 2004 b->b_deferred++; 2005 2006 m->m_flags |= M_SKIP_FIREWALL; 2007 st->state_flags |= PFSTATE_ACK; 2008 2009 pd->pd_sc = sc; 2010 pd->pd_st = st; 2011 pf_ref_state(st); 2012 pd->pd_m = m; 2013 2014 TAILQ_INSERT_TAIL(&b->b_deferrals, pd, pd_entry); 2015 callout_init_mtx(&pd->pd_tmo, &b->b_mtx, CALLOUT_RETURNUNLOCKED); 2016 callout_reset(&pd->pd_tmo, (V_pfsync_defer_timeout * hz) / 1000, 2017 pfsync_defer_tmo, pd); 2018 2019 pfsync_push(b); 2020 PFSYNC_BUCKET_UNLOCK(b); 2021 2022 return (1); 2023 } 2024 2025 static void 2026 pfsync_undefer(struct pfsync_deferral *pd, int drop) 2027 { 2028 struct pfsync_softc *sc = pd->pd_sc; 2029 struct mbuf *m = pd->pd_m; 2030 struct pf_kstate *st = pd->pd_st; 2031 struct pfsync_bucket *b = pfsync_get_bucket(sc, st); 2032 2033 PFSYNC_BUCKET_LOCK_ASSERT(b); 2034 2035 TAILQ_REMOVE(&b->b_deferrals, pd, pd_entry); 2036 b->b_deferred--; 2037 pd->pd_st->state_flags &= ~PFSTATE_ACK; /* XXX: locking! */ 2038 free(pd, M_PFSYNC); 2039 pf_release_state(st); 2040 2041 if (drop) 2042 m_freem(m); 2043 else { 2044 _IF_ENQUEUE(&b->b_snd, m); 2045 pfsync_push(b); 2046 } 2047 } 2048 2049 static void 2050 pfsync_defer_tmo(void *arg) 2051 { 2052 struct epoch_tracker et; 2053 struct pfsync_deferral *pd = arg; 2054 struct pfsync_softc *sc = pd->pd_sc; 2055 struct mbuf *m = pd->pd_m; 2056 struct pf_kstate *st = pd->pd_st; 2057 struct pfsync_bucket *b = pfsync_get_bucket(sc, st); 2058 2059 PFSYNC_BUCKET_LOCK_ASSERT(b); 2060 2061 TAILQ_REMOVE(&b->b_deferrals, pd, pd_entry); 2062 b->b_deferred--; 2063 pd->pd_st->state_flags &= ~PFSTATE_ACK; /* XXX: locking! */ 2064 PFSYNC_BUCKET_UNLOCK(b); 2065 free(pd, M_PFSYNC); 2066 2067 if (sc->sc_sync_if == NULL) { 2068 pf_release_state(st); 2069 m_freem(m); 2070 return; 2071 } 2072 2073 NET_EPOCH_ENTER(et); 2074 CURVNET_SET(sc->sc_sync_if->if_vnet); 2075 2076 pfsync_tx(sc, m); 2077 2078 pf_release_state(st); 2079 2080 CURVNET_RESTORE(); 2081 NET_EPOCH_EXIT(et); 2082 } 2083 2084 static void 2085 pfsync_undefer_state_locked(struct pf_kstate *st, int drop) 2086 { 2087 struct pfsync_softc *sc = V_pfsyncif; 2088 struct pfsync_deferral *pd; 2089 struct pfsync_bucket *b = pfsync_get_bucket(sc, st); 2090 2091 PFSYNC_BUCKET_LOCK_ASSERT(b); 2092 2093 TAILQ_FOREACH(pd, &b->b_deferrals, pd_entry) { 2094 if (pd->pd_st == st) { 2095 if (callout_stop(&pd->pd_tmo) > 0) 2096 pfsync_undefer(pd, drop); 2097 2098 return; 2099 } 2100 } 2101 2102 panic("%s: unable to find deferred state", __func__); 2103 } 2104 2105 static void 2106 pfsync_undefer_state(struct pf_kstate *st, int drop) 2107 { 2108 struct pfsync_softc *sc = V_pfsyncif; 2109 struct pfsync_bucket *b = pfsync_get_bucket(sc, st); 2110 2111 PFSYNC_BUCKET_LOCK(b); 2112 pfsync_undefer_state_locked(st, drop); 2113 PFSYNC_BUCKET_UNLOCK(b); 2114 } 2115 2116 static struct pfsync_bucket* 2117 pfsync_get_bucket(struct pfsync_softc *sc, struct pf_kstate *st) 2118 { 2119 int c = PF_IDHASH(st) % pfsync_buckets; 2120 return &sc->sc_buckets[c]; 2121 } 2122 2123 static void 2124 pfsync_update_state(struct pf_kstate *st) 2125 { 2126 struct pfsync_softc *sc = V_pfsyncif; 2127 bool sync = false, ref = true; 2128 struct pfsync_bucket *b = pfsync_get_bucket(sc, st); 2129 2130 PF_STATE_LOCK_ASSERT(st); 2131 PFSYNC_BUCKET_LOCK(b); 2132 2133 if (st->state_flags & PFSTATE_ACK) 2134 pfsync_undefer_state_locked(st, 0); 2135 if (st->state_flags & PFSTATE_NOSYNC) { 2136 if (st->sync_state != PFSYNC_S_NONE) 2137 pfsync_q_del(st, true, b); 2138 PFSYNC_BUCKET_UNLOCK(b); 2139 return; 2140 } 2141 2142 if (b->b_len == PFSYNC_MINPKT) 2143 callout_reset(&b->b_tmo, 1 * hz, pfsync_timeout, b); 2144 2145 switch (st->sync_state) { 2146 case PFSYNC_S_UPD_C: 2147 case PFSYNC_S_UPD: 2148 case PFSYNC_S_INS: 2149 /* we're already handling it */ 2150 2151 if (st->key[PF_SK_WIRE]->proto == IPPROTO_TCP) { 2152 st->sync_updates++; 2153 if (st->sync_updates >= sc->sc_maxupdates) 2154 sync = true; 2155 } 2156 break; 2157 2158 case PFSYNC_S_IACK: 2159 pfsync_q_del(st, false, b); 2160 ref = false; 2161 /* FALLTHROUGH */ 2162 2163 case PFSYNC_S_NONE: 2164 pfsync_q_ins(st, PFSYNC_S_UPD_C, ref); 2165 st->sync_updates = 0; 2166 break; 2167 2168 default: 2169 panic("%s: unexpected sync state %d", __func__, st->sync_state); 2170 } 2171 2172 if (sync || (time_uptime - st->pfsync_time) < 2) 2173 pfsync_push(b); 2174 2175 PFSYNC_BUCKET_UNLOCK(b); 2176 } 2177 2178 static void 2179 pfsync_request_update(u_int32_t creatorid, u_int64_t id) 2180 { 2181 struct pfsync_softc *sc = V_pfsyncif; 2182 struct pfsync_bucket *b = &sc->sc_buckets[0]; 2183 struct pfsync_upd_req_item *item; 2184 size_t nlen = sizeof(struct pfsync_upd_req); 2185 2186 PFSYNC_BUCKET_LOCK_ASSERT(b); 2187 2188 /* 2189 * This code does a bit to prevent multiple update requests for the 2190 * same state being generated. It searches current subheader queue, 2191 * but it doesn't lookup into queue of already packed datagrams. 2192 */ 2193 TAILQ_FOREACH(item, &b->b_upd_req_list, ur_entry) 2194 if (item->ur_msg.id == id && 2195 item->ur_msg.creatorid == creatorid) 2196 return; 2197 2198 item = malloc(sizeof(*item), M_PFSYNC, M_NOWAIT); 2199 if (item == NULL) 2200 return; /* XXX stats */ 2201 2202 item->ur_msg.id = id; 2203 item->ur_msg.creatorid = creatorid; 2204 2205 if (TAILQ_EMPTY(&b->b_upd_req_list)) 2206 nlen += sizeof(struct pfsync_subheader); 2207 2208 if (b->b_len + nlen > sc->sc_ifp->if_mtu) { 2209 pfsync_sendout(0, 0); 2210 2211 nlen = sizeof(struct pfsync_subheader) + 2212 sizeof(struct pfsync_upd_req); 2213 } 2214 2215 TAILQ_INSERT_TAIL(&b->b_upd_req_list, item, ur_entry); 2216 b->b_len += nlen; 2217 2218 pfsync_push(b); 2219 } 2220 2221 static bool 2222 pfsync_update_state_req(struct pf_kstate *st) 2223 { 2224 struct pfsync_softc *sc = V_pfsyncif; 2225 bool ref = true, full = false; 2226 struct pfsync_bucket *b = pfsync_get_bucket(sc, st); 2227 2228 PF_STATE_LOCK_ASSERT(st); 2229 PFSYNC_BUCKET_LOCK(b); 2230 2231 if (st->state_flags & PFSTATE_NOSYNC) { 2232 if (st->sync_state != PFSYNC_S_NONE) 2233 pfsync_q_del(st, true, b); 2234 PFSYNC_BUCKET_UNLOCK(b); 2235 return (full); 2236 } 2237 2238 switch (st->sync_state) { 2239 case PFSYNC_S_UPD_C: 2240 case PFSYNC_S_IACK: 2241 pfsync_q_del(st, false, b); 2242 ref = false; 2243 /* FALLTHROUGH */ 2244 2245 case PFSYNC_S_NONE: 2246 pfsync_q_ins(st, PFSYNC_S_UPD, ref); 2247 pfsync_push(b); 2248 break; 2249 2250 case PFSYNC_S_INS: 2251 case PFSYNC_S_UPD: 2252 case PFSYNC_S_DEL_C: 2253 /* we're already handling it */ 2254 break; 2255 2256 default: 2257 panic("%s: unexpected sync state %d", __func__, st->sync_state); 2258 } 2259 2260 if ((sc->sc_ifp->if_mtu - b->b_len) < sizeof(union pfsync_state_union)) 2261 full = true; 2262 2263 PFSYNC_BUCKET_UNLOCK(b); 2264 2265 return (full); 2266 } 2267 2268 static void 2269 pfsync_delete_state(struct pf_kstate *st) 2270 { 2271 struct pfsync_softc *sc = V_pfsyncif; 2272 struct pfsync_bucket *b = pfsync_get_bucket(sc, st); 2273 bool ref = true; 2274 2275 PFSYNC_BUCKET_LOCK(b); 2276 if (st->state_flags & PFSTATE_ACK) 2277 pfsync_undefer_state_locked(st, 1); 2278 if (st->state_flags & PFSTATE_NOSYNC) { 2279 if (st->sync_state != PFSYNC_S_NONE) 2280 pfsync_q_del(st, true, b); 2281 PFSYNC_BUCKET_UNLOCK(b); 2282 return; 2283 } 2284 2285 if (b->b_len == PFSYNC_MINPKT) 2286 callout_reset(&b->b_tmo, 1 * hz, pfsync_timeout, b); 2287 2288 switch (st->sync_state) { 2289 case PFSYNC_S_INS: 2290 /* We never got to tell the world so just forget about it. */ 2291 pfsync_q_del(st, true, b); 2292 break; 2293 2294 case PFSYNC_S_UPD_C: 2295 case PFSYNC_S_UPD: 2296 case PFSYNC_S_IACK: 2297 pfsync_q_del(st, false, b); 2298 ref = false; 2299 /* FALLTHROUGH */ 2300 2301 case PFSYNC_S_NONE: 2302 pfsync_q_ins(st, PFSYNC_S_DEL_C, ref); 2303 break; 2304 2305 default: 2306 panic("%s: unexpected sync state %d", __func__, st->sync_state); 2307 } 2308 2309 PFSYNC_BUCKET_UNLOCK(b); 2310 } 2311 2312 static void 2313 pfsync_clear_states(u_int32_t creatorid, const char *ifname) 2314 { 2315 struct { 2316 struct pfsync_subheader subh; 2317 struct pfsync_clr clr; 2318 } __packed r; 2319 2320 bzero(&r, sizeof(r)); 2321 2322 r.subh.action = PFSYNC_ACT_CLR; 2323 r.subh.count = htons(1); 2324 V_pfsyncstats.pfsyncs_oacts[PFSYNC_ACT_CLR]++; 2325 2326 strlcpy(r.clr.ifname, ifname, sizeof(r.clr.ifname)); 2327 r.clr.creatorid = creatorid; 2328 2329 pfsync_send_plus(&r, sizeof(r)); 2330 } 2331 2332 static enum pfsync_q_id 2333 pfsync_sstate_to_qid(u_int8_t sync_state) 2334 { 2335 struct pfsync_softc *sc = V_pfsyncif; 2336 2337 switch (sync_state) { 2338 case PFSYNC_S_INS: 2339 switch (sc->sc_version) { 2340 case PFSYNC_MSG_VERSION_1301: 2341 return PFSYNC_Q_INS_1301; 2342 case PFSYNC_MSG_VERSION_1400: 2343 return PFSYNC_Q_INS_1400; 2344 } 2345 break; 2346 case PFSYNC_S_IACK: 2347 return PFSYNC_Q_IACK; 2348 case PFSYNC_S_UPD: 2349 switch (sc->sc_version) { 2350 case PFSYNC_MSG_VERSION_1301: 2351 return PFSYNC_Q_UPD_1301; 2352 case PFSYNC_MSG_VERSION_1400: 2353 return PFSYNC_Q_UPD_1400; 2354 } 2355 break; 2356 case PFSYNC_S_UPD_C: 2357 return PFSYNC_Q_UPD_C; 2358 case PFSYNC_S_DEL_C: 2359 return PFSYNC_Q_DEL_C; 2360 default: 2361 panic("%s: Unsupported st->sync_state 0x%02x", 2362 __func__, sync_state); 2363 } 2364 2365 panic("%s: Unsupported pfsync_msg_version %d", 2366 __func__, sc->sc_version); 2367 } 2368 2369 static void 2370 pfsync_q_ins(struct pf_kstate *st, int sync_state, bool ref) 2371 { 2372 enum pfsync_q_id q = pfsync_sstate_to_qid(sync_state); 2373 struct pfsync_softc *sc = V_pfsyncif; 2374 size_t nlen = pfsync_qs[q].len; 2375 struct pfsync_bucket *b = pfsync_get_bucket(sc, st); 2376 2377 PFSYNC_BUCKET_LOCK_ASSERT(b); 2378 2379 KASSERT(st->sync_state == PFSYNC_S_NONE, 2380 ("%s: st->sync_state %u", __func__, st->sync_state)); 2381 KASSERT(b->b_len >= PFSYNC_MINPKT, ("pfsync pkt len is too low %zu", 2382 b->b_len)); 2383 2384 if (TAILQ_EMPTY(&b->b_qs[q])) 2385 nlen += sizeof(struct pfsync_subheader); 2386 2387 if (b->b_len + nlen > sc->sc_ifp->if_mtu) { 2388 pfsync_sendout(1, b->b_id); 2389 2390 nlen = sizeof(struct pfsync_subheader) + pfsync_qs[q].len; 2391 } 2392 2393 b->b_len += nlen; 2394 TAILQ_INSERT_TAIL(&b->b_qs[q], st, sync_list); 2395 st->sync_state = pfsync_qid_sstate[q]; 2396 if (ref) 2397 pf_ref_state(st); 2398 } 2399 2400 static void 2401 pfsync_q_del(struct pf_kstate *st, bool unref, struct pfsync_bucket *b) 2402 { 2403 enum pfsync_q_id q; 2404 2405 PFSYNC_BUCKET_LOCK_ASSERT(b); 2406 KASSERT(st->sync_state != PFSYNC_S_NONE, 2407 ("%s: st->sync_state != PFSYNC_S_NONE", __func__)); 2408 2409 q = pfsync_sstate_to_qid(st->sync_state); 2410 b->b_len -= pfsync_qs[q].len; 2411 TAILQ_REMOVE(&b->b_qs[q], st, sync_list); 2412 st->sync_state = PFSYNC_S_NONE; 2413 if (unref) 2414 pf_release_state(st); 2415 2416 if (TAILQ_EMPTY(&b->b_qs[q])) 2417 b->b_len -= sizeof(struct pfsync_subheader); 2418 } 2419 2420 static void 2421 pfsync_bulk_start(void) 2422 { 2423 struct pfsync_softc *sc = V_pfsyncif; 2424 2425 if (V_pf_status.debug >= PF_DEBUG_MISC) 2426 printf("pfsync: received bulk update request\n"); 2427 2428 PFSYNC_BLOCK(sc); 2429 2430 sc->sc_ureq_received = time_uptime; 2431 sc->sc_bulk_hashid = 0; 2432 sc->sc_bulk_stateid = 0; 2433 pfsync_bulk_status(PFSYNC_BUS_START); 2434 callout_reset(&sc->sc_bulk_tmo, 1, pfsync_bulk_update, sc); 2435 PFSYNC_BUNLOCK(sc); 2436 } 2437 2438 static void 2439 pfsync_bulk_update(void *arg) 2440 { 2441 struct pfsync_softc *sc = arg; 2442 struct pf_kstate *s; 2443 int i; 2444 2445 PFSYNC_BLOCK_ASSERT(sc); 2446 CURVNET_SET(sc->sc_ifp->if_vnet); 2447 2448 /* 2449 * Start with last state from previous invocation. 2450 * It may had gone, in this case start from the 2451 * hash slot. 2452 */ 2453 s = pf_find_state_byid(sc->sc_bulk_stateid, sc->sc_bulk_creatorid); 2454 2455 if (s != NULL) 2456 i = PF_IDHASH(s); 2457 else 2458 i = sc->sc_bulk_hashid; 2459 2460 for (; i <= pf_hashmask; i++) { 2461 struct pf_idhash *ih = &V_pf_idhash[i]; 2462 2463 if (s != NULL) 2464 PF_HASHROW_ASSERT(ih); 2465 else { 2466 PF_HASHROW_LOCK(ih); 2467 s = LIST_FIRST(&ih->states); 2468 } 2469 2470 for (; s; s = LIST_NEXT(s, entry)) { 2471 if (s->sync_state == PFSYNC_S_NONE && 2472 s->timeout < PFTM_MAX && 2473 s->pfsync_time <= sc->sc_ureq_received) { 2474 if (pfsync_update_state_req(s)) { 2475 /* We've filled a packet. */ 2476 sc->sc_bulk_hashid = i; 2477 sc->sc_bulk_stateid = s->id; 2478 sc->sc_bulk_creatorid = s->creatorid; 2479 PF_HASHROW_UNLOCK(ih); 2480 callout_reset(&sc->sc_bulk_tmo, 1, 2481 pfsync_bulk_update, sc); 2482 goto full; 2483 } 2484 } 2485 } 2486 PF_HASHROW_UNLOCK(ih); 2487 } 2488 2489 /* We're done. */ 2490 pfsync_bulk_status(PFSYNC_BUS_END); 2491 full: 2492 CURVNET_RESTORE(); 2493 } 2494 2495 static void 2496 pfsync_bulk_status(u_int8_t status) 2497 { 2498 struct { 2499 struct pfsync_subheader subh; 2500 struct pfsync_bus bus; 2501 } __packed r; 2502 2503 struct pfsync_softc *sc = V_pfsyncif; 2504 2505 bzero(&r, sizeof(r)); 2506 2507 r.subh.action = PFSYNC_ACT_BUS; 2508 r.subh.count = htons(1); 2509 V_pfsyncstats.pfsyncs_oacts[PFSYNC_ACT_BUS]++; 2510 2511 r.bus.creatorid = V_pf_status.hostid; 2512 r.bus.endtime = htonl(time_uptime - sc->sc_ureq_received); 2513 r.bus.status = status; 2514 2515 pfsync_send_plus(&r, sizeof(r)); 2516 } 2517 2518 static void 2519 pfsync_bulk_fail(void *arg) 2520 { 2521 struct pfsync_softc *sc = arg; 2522 struct pfsync_bucket *b = &sc->sc_buckets[0]; 2523 2524 CURVNET_SET(sc->sc_ifp->if_vnet); 2525 2526 PFSYNC_BLOCK_ASSERT(sc); 2527 2528 if (sc->sc_bulk_tries++ < PFSYNC_MAX_BULKTRIES) { 2529 /* Try again */ 2530 callout_reset(&sc->sc_bulkfail_tmo, 5 * hz, 2531 pfsync_bulk_fail, V_pfsyncif); 2532 PFSYNC_BUCKET_LOCK(b); 2533 pfsync_request_update(0, 0); 2534 PFSYNC_BUCKET_UNLOCK(b); 2535 } else { 2536 /* Pretend like the transfer was ok. */ 2537 sc->sc_ureq_sent = 0; 2538 sc->sc_bulk_tries = 0; 2539 PFSYNC_LOCK(sc); 2540 if (!(sc->sc_flags & PFSYNCF_OK) && carp_demote_adj_p) 2541 (*carp_demote_adj_p)(-V_pfsync_carp_adj, 2542 "pfsync bulk fail"); 2543 sc->sc_flags |= PFSYNCF_OK; 2544 PFSYNC_UNLOCK(sc); 2545 if (V_pf_status.debug >= PF_DEBUG_MISC) 2546 printf("pfsync: failed to receive bulk update\n"); 2547 } 2548 2549 CURVNET_RESTORE(); 2550 } 2551 2552 static void 2553 pfsync_send_plus(void *plus, size_t pluslen) 2554 { 2555 struct pfsync_softc *sc = V_pfsyncif; 2556 struct pfsync_bucket *b = &sc->sc_buckets[0]; 2557 2558 PFSYNC_BUCKET_LOCK(b); 2559 2560 if (b->b_len + pluslen > sc->sc_ifp->if_mtu) 2561 pfsync_sendout(1, b->b_id); 2562 2563 b->b_plus = plus; 2564 b->b_len += (b->b_pluslen = pluslen); 2565 2566 pfsync_sendout(1, b->b_id); 2567 PFSYNC_BUCKET_UNLOCK(b); 2568 } 2569 2570 static void 2571 pfsync_timeout(void *arg) 2572 { 2573 struct pfsync_bucket *b = arg; 2574 2575 CURVNET_SET(b->b_sc->sc_ifp->if_vnet); 2576 PFSYNC_BUCKET_LOCK(b); 2577 pfsync_push(b); 2578 PFSYNC_BUCKET_UNLOCK(b); 2579 CURVNET_RESTORE(); 2580 } 2581 2582 static void 2583 pfsync_push(struct pfsync_bucket *b) 2584 { 2585 2586 PFSYNC_BUCKET_LOCK_ASSERT(b); 2587 2588 b->b_flags |= PFSYNCF_BUCKET_PUSH; 2589 swi_sched(V_pfsync_swi_cookie, 0); 2590 } 2591 2592 static void 2593 pfsync_push_all(struct pfsync_softc *sc) 2594 { 2595 int c; 2596 struct pfsync_bucket *b; 2597 2598 for (c = 0; c < pfsync_buckets; c++) { 2599 b = &sc->sc_buckets[c]; 2600 2601 PFSYNC_BUCKET_LOCK(b); 2602 pfsync_push(b); 2603 PFSYNC_BUCKET_UNLOCK(b); 2604 } 2605 } 2606 2607 static void 2608 pfsync_tx(struct pfsync_softc *sc, struct mbuf *m) 2609 { 2610 struct ip *ip; 2611 int af, error = 0; 2612 2613 ip = mtod(m, struct ip *); 2614 MPASS(ip->ip_v == IPVERSION || ip->ip_v == (IPV6_VERSION >> 4)); 2615 2616 af = ip->ip_v == IPVERSION ? AF_INET : AF_INET6; 2617 2618 /* 2619 * We distinguish between a deferral packet and our 2620 * own pfsync packet based on M_SKIP_FIREWALL 2621 * flag. This is XXX. 2622 */ 2623 switch (af) { 2624 #ifdef INET 2625 case AF_INET: 2626 if (m->m_flags & M_SKIP_FIREWALL) { 2627 error = ip_output(m, NULL, NULL, 0, 2628 NULL, NULL); 2629 } else { 2630 error = ip_output(m, NULL, NULL, 2631 IP_RAWOUTPUT, &sc->sc_imo, NULL); 2632 } 2633 break; 2634 #endif 2635 #ifdef INET6 2636 case AF_INET6: 2637 if (m->m_flags & M_SKIP_FIREWALL) { 2638 error = ip6_output(m, NULL, NULL, 0, 2639 NULL, NULL, NULL); 2640 } else { 2641 error = ip6_output(m, NULL, NULL, 0, 2642 &sc->sc_im6o, NULL, NULL); 2643 } 2644 break; 2645 #endif 2646 } 2647 2648 if (error == 0) 2649 V_pfsyncstats.pfsyncs_opackets++; 2650 else 2651 V_pfsyncstats.pfsyncs_oerrors++; 2652 2653 } 2654 2655 static void 2656 pfsyncintr(void *arg) 2657 { 2658 struct epoch_tracker et; 2659 struct pfsync_softc *sc = arg; 2660 struct pfsync_bucket *b; 2661 struct mbuf *m, *n; 2662 int c; 2663 2664 NET_EPOCH_ENTER(et); 2665 CURVNET_SET(sc->sc_ifp->if_vnet); 2666 2667 for (c = 0; c < pfsync_buckets; c++) { 2668 b = &sc->sc_buckets[c]; 2669 2670 PFSYNC_BUCKET_LOCK(b); 2671 if ((b->b_flags & PFSYNCF_BUCKET_PUSH) && b->b_len > PFSYNC_MINPKT) { 2672 pfsync_sendout(0, b->b_id); 2673 b->b_flags &= ~PFSYNCF_BUCKET_PUSH; 2674 } 2675 _IF_DEQUEUE_ALL(&b->b_snd, m); 2676 PFSYNC_BUCKET_UNLOCK(b); 2677 2678 for (; m != NULL; m = n) { 2679 n = m->m_nextpkt; 2680 m->m_nextpkt = NULL; 2681 2682 pfsync_tx(sc, m); 2683 } 2684 } 2685 CURVNET_RESTORE(); 2686 NET_EPOCH_EXIT(et); 2687 } 2688 2689 static int 2690 pfsync_multicast_setup(struct pfsync_softc *sc, struct ifnet *ifp, 2691 struct in_mfilter* imf, struct in6_mfilter* im6f) 2692 { 2693 #ifdef INET 2694 struct ip_moptions *imo = &sc->sc_imo; 2695 #endif 2696 #ifdef INET6 2697 struct ip6_moptions *im6o = &sc->sc_im6o; 2698 struct sockaddr_in6 *syncpeer_sa6 = NULL; 2699 #endif 2700 2701 if (!(ifp->if_flags & IFF_MULTICAST)) 2702 return (EADDRNOTAVAIL); 2703 2704 switch (sc->sc_sync_peer.ss_family) { 2705 #ifdef INET 2706 case AF_INET: 2707 { 2708 int error; 2709 2710 ip_mfilter_init(&imo->imo_head); 2711 imo->imo_multicast_vif = -1; 2712 if ((error = in_joingroup(ifp, 2713 &((struct sockaddr_in *)&sc->sc_sync_peer)->sin_addr, NULL, 2714 &imf->imf_inm)) != 0) 2715 return (error); 2716 2717 ip_mfilter_insert(&imo->imo_head, imf); 2718 imo->imo_multicast_ifp = ifp; 2719 imo->imo_multicast_ttl = PFSYNC_DFLTTL; 2720 imo->imo_multicast_loop = 0; 2721 break; 2722 } 2723 #endif 2724 #ifdef INET6 2725 case AF_INET6: 2726 { 2727 int error; 2728 2729 syncpeer_sa6 = (struct sockaddr_in6 *)&sc->sc_sync_peer; 2730 if ((error = in6_setscope(&syncpeer_sa6->sin6_addr, ifp, NULL))) 2731 return (error); 2732 2733 ip6_mfilter_init(&im6o->im6o_head); 2734 if ((error = in6_joingroup(ifp, &syncpeer_sa6->sin6_addr, NULL, 2735 &(im6f->im6f_in6m), 0)) != 0) 2736 return (error); 2737 2738 ip6_mfilter_insert(&im6o->im6o_head, im6f); 2739 im6o->im6o_multicast_ifp = ifp; 2740 im6o->im6o_multicast_hlim = PFSYNC_DFLTTL; 2741 im6o->im6o_multicast_loop = 0; 2742 break; 2743 } 2744 #endif 2745 } 2746 2747 return (0); 2748 } 2749 2750 static void 2751 pfsync_multicast_cleanup(struct pfsync_softc *sc) 2752 { 2753 #ifdef INET 2754 struct ip_moptions *imo = &sc->sc_imo; 2755 struct in_mfilter *imf; 2756 2757 while ((imf = ip_mfilter_first(&imo->imo_head)) != NULL) { 2758 ip_mfilter_remove(&imo->imo_head, imf); 2759 in_leavegroup(imf->imf_inm, NULL); 2760 ip_mfilter_free(imf); 2761 } 2762 imo->imo_multicast_ifp = NULL; 2763 #endif 2764 2765 #ifdef INET6 2766 struct ip6_moptions *im6o = &sc->sc_im6o; 2767 struct in6_mfilter *im6f; 2768 2769 while ((im6f = ip6_mfilter_first(&im6o->im6o_head)) != NULL) { 2770 ip6_mfilter_remove(&im6o->im6o_head, im6f); 2771 in6_leavegroup(im6f->im6f_in6m, NULL); 2772 ip6_mfilter_free(im6f); 2773 } 2774 im6o->im6o_multicast_ifp = NULL; 2775 #endif 2776 } 2777 2778 void 2779 pfsync_detach_ifnet(struct ifnet *ifp) 2780 { 2781 struct pfsync_softc *sc = V_pfsyncif; 2782 2783 if (sc == NULL) 2784 return; 2785 2786 PFSYNC_LOCK(sc); 2787 2788 if (sc->sc_sync_if == ifp) { 2789 /* We don't need mutlicast cleanup here, because the interface 2790 * is going away. We do need to ensure we don't try to do 2791 * cleanup later. 2792 */ 2793 ip_mfilter_init(&sc->sc_imo.imo_head); 2794 sc->sc_imo.imo_multicast_ifp = NULL; 2795 sc->sc_im6o.im6o_multicast_ifp = NULL; 2796 sc->sc_sync_if = NULL; 2797 } 2798 2799 PFSYNC_UNLOCK(sc); 2800 } 2801 2802 static int 2803 pfsync_pfsyncreq_to_kstatus(struct pfsyncreq *pfsyncr, struct pfsync_kstatus *status) 2804 { 2805 struct sockaddr_storage sa; 2806 status->maxupdates = pfsyncr->pfsyncr_maxupdates; 2807 status->flags = pfsyncr->pfsyncr_defer; 2808 2809 strlcpy(status->syncdev, pfsyncr->pfsyncr_syncdev, IFNAMSIZ); 2810 2811 memset(&sa, 0, sizeof(sa)); 2812 if (pfsyncr->pfsyncr_syncpeer.s_addr != 0) { 2813 struct sockaddr_in *in = (struct sockaddr_in *)&sa; 2814 in->sin_family = AF_INET; 2815 in->sin_len = sizeof(*in); 2816 in->sin_addr.s_addr = pfsyncr->pfsyncr_syncpeer.s_addr; 2817 } 2818 status->syncpeer = sa; 2819 2820 return 0; 2821 } 2822 2823 static int 2824 pfsync_kstatus_to_softc(struct pfsync_kstatus *status, struct pfsync_softc *sc) 2825 { 2826 struct ifnet *sifp; 2827 struct in_mfilter *imf = NULL; 2828 struct in6_mfilter *im6f = NULL; 2829 int error; 2830 int c; 2831 2832 if ((status->maxupdates < 0) || (status->maxupdates > 255)) 2833 return (EINVAL); 2834 2835 if (status->syncdev[0] == '\0') 2836 sifp = NULL; 2837 else if ((sifp = ifunit_ref(status->syncdev)) == NULL) 2838 return (EINVAL); 2839 2840 switch (status->syncpeer.ss_family) { 2841 #ifdef INET 2842 case AF_UNSPEC: 2843 case AF_INET: { 2844 struct sockaddr_in *status_sin; 2845 status_sin = (struct sockaddr_in *)&(status->syncpeer); 2846 if (sifp != NULL) { 2847 if (status_sin->sin_addr.s_addr == 0 || 2848 status_sin->sin_addr.s_addr == 2849 htonl(INADDR_PFSYNC_GROUP)) { 2850 status_sin->sin_family = AF_INET; 2851 status_sin->sin_len = sizeof(*status_sin); 2852 status_sin->sin_addr.s_addr = 2853 htonl(INADDR_PFSYNC_GROUP); 2854 } 2855 2856 if (IN_MULTICAST(ntohl(status_sin->sin_addr.s_addr))) { 2857 imf = ip_mfilter_alloc(M_WAITOK, 0, 0); 2858 } 2859 } 2860 break; 2861 } 2862 #endif 2863 #ifdef INET6 2864 case AF_INET6: { 2865 struct sockaddr_in6 *status_sin6; 2866 status_sin6 = (struct sockaddr_in6*)&(status->syncpeer); 2867 if (sifp != NULL) { 2868 if (IN6_IS_ADDR_UNSPECIFIED(&status_sin6->sin6_addr) || 2869 IN6_ARE_ADDR_EQUAL(&status_sin6->sin6_addr, 2870 &in6addr_linklocal_pfsync_group)) { 2871 status_sin6->sin6_family = AF_INET6; 2872 status_sin6->sin6_len = sizeof(*status_sin6); 2873 status_sin6->sin6_addr = 2874 in6addr_linklocal_pfsync_group; 2875 } 2876 2877 if (IN6_IS_ADDR_MULTICAST(&status_sin6->sin6_addr)) { 2878 im6f = ip6_mfilter_alloc(M_WAITOK, 0, 0); 2879 } 2880 } 2881 break; 2882 } 2883 #endif 2884 } 2885 2886 PFSYNC_LOCK(sc); 2887 2888 switch (status->version) { 2889 case PFSYNC_MSG_VERSION_UNSPECIFIED: 2890 sc->sc_version = PFSYNC_MSG_VERSION_DEFAULT; 2891 break; 2892 case PFSYNC_MSG_VERSION_1301: 2893 case PFSYNC_MSG_VERSION_1400: 2894 sc->sc_version = status->version; 2895 break; 2896 default: 2897 PFSYNC_UNLOCK(sc); 2898 return (EINVAL); 2899 } 2900 2901 switch (status->syncpeer.ss_family) { 2902 case AF_INET: { 2903 struct sockaddr_in *status_sin = (struct sockaddr_in *)&(status->syncpeer); 2904 struct sockaddr_in *sc_sin = (struct sockaddr_in *)&sc->sc_sync_peer; 2905 sc_sin->sin_family = AF_INET; 2906 sc_sin->sin_len = sizeof(*sc_sin); 2907 if (status_sin->sin_addr.s_addr == 0) { 2908 sc_sin->sin_addr.s_addr = htonl(INADDR_PFSYNC_GROUP); 2909 } else { 2910 sc_sin->sin_addr.s_addr = status_sin->sin_addr.s_addr; 2911 } 2912 break; 2913 } 2914 case AF_INET6: { 2915 struct sockaddr_in6 *status_sin = (struct sockaddr_in6 *)&(status->syncpeer); 2916 struct sockaddr_in6 *sc_sin = (struct sockaddr_in6 *)&sc->sc_sync_peer; 2917 sc_sin->sin6_family = AF_INET6; 2918 sc_sin->sin6_len = sizeof(*sc_sin); 2919 if(IN6_IS_ADDR_UNSPECIFIED(&status_sin->sin6_addr)) { 2920 sc_sin->sin6_addr = in6addr_linklocal_pfsync_group; 2921 } else { 2922 sc_sin->sin6_addr = status_sin->sin6_addr; 2923 } 2924 break; 2925 } 2926 } 2927 2928 sc->sc_maxupdates = status->maxupdates; 2929 if (status->flags & PFSYNCF_DEFER) { 2930 sc->sc_flags |= PFSYNCF_DEFER; 2931 V_pfsync_defer_ptr = pfsync_defer; 2932 } else { 2933 sc->sc_flags &= ~PFSYNCF_DEFER; 2934 V_pfsync_defer_ptr = NULL; 2935 } 2936 2937 if (sifp == NULL) { 2938 if (sc->sc_sync_if) 2939 if_rele(sc->sc_sync_if); 2940 sc->sc_sync_if = NULL; 2941 pfsync_multicast_cleanup(sc); 2942 PFSYNC_UNLOCK(sc); 2943 return (0); 2944 } 2945 2946 for (c = 0; c < pfsync_buckets; c++) { 2947 PFSYNC_BUCKET_LOCK(&sc->sc_buckets[c]); 2948 if (sc->sc_buckets[c].b_len > PFSYNC_MINPKT && 2949 (sifp->if_mtu < sc->sc_ifp->if_mtu || 2950 (sc->sc_sync_if != NULL && 2951 sifp->if_mtu < sc->sc_sync_if->if_mtu) || 2952 sifp->if_mtu < MCLBYTES - sizeof(struct ip))) 2953 pfsync_sendout(1, c); 2954 PFSYNC_BUCKET_UNLOCK(&sc->sc_buckets[c]); 2955 } 2956 2957 pfsync_multicast_cleanup(sc); 2958 2959 if (((sc->sc_sync_peer.ss_family == AF_INET) && 2960 IN_MULTICAST(ntohl(((struct sockaddr_in *) 2961 &sc->sc_sync_peer)->sin_addr.s_addr))) || 2962 ((sc->sc_sync_peer.ss_family == AF_INET6) && 2963 IN6_IS_ADDR_MULTICAST(&((struct sockaddr_in6*) 2964 &sc->sc_sync_peer)->sin6_addr))) { 2965 error = pfsync_multicast_setup(sc, sifp, imf, im6f); 2966 if (error) { 2967 if_rele(sifp); 2968 PFSYNC_UNLOCK(sc); 2969 #ifdef INET 2970 if (imf != NULL) 2971 ip_mfilter_free(imf); 2972 #endif 2973 #ifdef INET6 2974 if (im6f != NULL) 2975 ip6_mfilter_free(im6f); 2976 #endif 2977 return (error); 2978 } 2979 } 2980 if (sc->sc_sync_if) 2981 if_rele(sc->sc_sync_if); 2982 sc->sc_sync_if = sifp; 2983 2984 switch (sc->sc_sync_peer.ss_family) { 2985 #ifdef INET 2986 case AF_INET: { 2987 struct ip *ip; 2988 ip = &sc->sc_template.ipv4; 2989 bzero(ip, sizeof(*ip)); 2990 ip->ip_v = IPVERSION; 2991 ip->ip_hl = sizeof(sc->sc_template.ipv4) >> 2; 2992 ip->ip_tos = IPTOS_LOWDELAY; 2993 /* len and id are set later. */ 2994 ip->ip_off = htons(IP_DF); 2995 ip->ip_ttl = PFSYNC_DFLTTL; 2996 ip->ip_p = IPPROTO_PFSYNC; 2997 ip->ip_src.s_addr = INADDR_ANY; 2998 ip->ip_dst = ((struct sockaddr_in *)&sc->sc_sync_peer)->sin_addr; 2999 break; 3000 } 3001 #endif 3002 #ifdef INET6 3003 case AF_INET6: { 3004 struct ip6_hdr *ip6; 3005 ip6 = &sc->sc_template.ipv6; 3006 bzero(ip6, sizeof(*ip6)); 3007 ip6->ip6_vfc = IPV6_VERSION; 3008 ip6->ip6_hlim = PFSYNC_DFLTTL; 3009 ip6->ip6_nxt = IPPROTO_PFSYNC; 3010 ip6->ip6_dst = ((struct sockaddr_in6 *)&sc->sc_sync_peer)->sin6_addr; 3011 3012 struct epoch_tracker et; 3013 NET_EPOCH_ENTER(et); 3014 in6_selectsrc_addr(if_getfib(sc->sc_sync_if), &ip6->ip6_dst, 0, 3015 sc->sc_sync_if, &ip6->ip6_src, NULL); 3016 NET_EPOCH_EXIT(et); 3017 break; 3018 } 3019 #endif 3020 } 3021 3022 /* Request a full state table update. */ 3023 if ((sc->sc_flags & PFSYNCF_OK) && carp_demote_adj_p) 3024 (*carp_demote_adj_p)(V_pfsync_carp_adj, 3025 "pfsync bulk start"); 3026 sc->sc_flags &= ~PFSYNCF_OK; 3027 if (V_pf_status.debug >= PF_DEBUG_MISC) 3028 printf("pfsync: requesting bulk update\n"); 3029 PFSYNC_UNLOCK(sc); 3030 PFSYNC_BUCKET_LOCK(&sc->sc_buckets[0]); 3031 pfsync_request_update(0, 0); 3032 PFSYNC_BUCKET_UNLOCK(&sc->sc_buckets[0]); 3033 PFSYNC_BLOCK(sc); 3034 sc->sc_ureq_sent = time_uptime; 3035 callout_reset(&sc->sc_bulkfail_tmo, 5 * hz, pfsync_bulk_fail, sc); 3036 PFSYNC_BUNLOCK(sc); 3037 return (0); 3038 } 3039 3040 static void 3041 pfsync_pointers_init(void) 3042 { 3043 3044 PF_RULES_WLOCK(); 3045 V_pfsync_state_import_ptr = pfsync_state_import; 3046 V_pfsync_insert_state_ptr = pfsync_insert_state; 3047 V_pfsync_update_state_ptr = pfsync_update_state; 3048 V_pfsync_delete_state_ptr = pfsync_delete_state; 3049 V_pfsync_clear_states_ptr = pfsync_clear_states; 3050 V_pfsync_defer_ptr = pfsync_defer; 3051 PF_RULES_WUNLOCK(); 3052 } 3053 3054 static void 3055 pfsync_pointers_uninit(void) 3056 { 3057 3058 PF_RULES_WLOCK(); 3059 V_pfsync_state_import_ptr = NULL; 3060 V_pfsync_insert_state_ptr = NULL; 3061 V_pfsync_update_state_ptr = NULL; 3062 V_pfsync_delete_state_ptr = NULL; 3063 V_pfsync_clear_states_ptr = NULL; 3064 V_pfsync_defer_ptr = NULL; 3065 PF_RULES_WUNLOCK(); 3066 } 3067 3068 static void 3069 vnet_pfsync_init(const void *unused __unused) 3070 { 3071 int error; 3072 3073 V_pfsync_cloner = if_clone_simple(pfsyncname, 3074 pfsync_clone_create, pfsync_clone_destroy, 1); 3075 error = swi_add(&V_pfsync_swi_ie, pfsyncname, pfsyncintr, V_pfsyncif, 3076 SWI_NET, INTR_MPSAFE, &V_pfsync_swi_cookie); 3077 if (error) { 3078 if_clone_detach(V_pfsync_cloner); 3079 log(LOG_INFO, "swi_add() failed in %s\n", __func__); 3080 } 3081 3082 pfsync_pointers_init(); 3083 } 3084 VNET_SYSINIT(vnet_pfsync_init, SI_SUB_PROTO_FIREWALL, SI_ORDER_ANY, 3085 vnet_pfsync_init, NULL); 3086 3087 static void 3088 vnet_pfsync_uninit(const void *unused __unused) 3089 { 3090 int ret __diagused; 3091 3092 pfsync_pointers_uninit(); 3093 3094 if_clone_detach(V_pfsync_cloner); 3095 ret = swi_remove(V_pfsync_swi_cookie); 3096 MPASS(ret == 0); 3097 ret = intr_event_destroy(V_pfsync_swi_ie); 3098 MPASS(ret == 0); 3099 } 3100 3101 VNET_SYSUNINIT(vnet_pfsync_uninit, SI_SUB_PROTO_FIREWALL, SI_ORDER_FOURTH, 3102 vnet_pfsync_uninit, NULL); 3103 3104 static int 3105 pfsync_init(void) 3106 { 3107 int error; 3108 3109 pfsync_detach_ifnet_ptr = pfsync_detach_ifnet; 3110 3111 #ifdef INET 3112 error = ipproto_register(IPPROTO_PFSYNC, pfsync_input, NULL); 3113 if (error) 3114 return (error); 3115 #endif 3116 #ifdef INET6 3117 error = ip6proto_register(IPPROTO_PFSYNC, pfsync6_input, NULL); 3118 if (error) { 3119 ipproto_unregister(IPPROTO_PFSYNC); 3120 return (error); 3121 } 3122 #endif 3123 3124 return (0); 3125 } 3126 3127 static void 3128 pfsync_uninit(void) 3129 { 3130 pfsync_detach_ifnet_ptr = NULL; 3131 3132 #ifdef INET 3133 ipproto_unregister(IPPROTO_PFSYNC); 3134 #endif 3135 #ifdef INET6 3136 ip6proto_unregister(IPPROTO_PFSYNC); 3137 #endif 3138 } 3139 3140 static int 3141 pfsync_modevent(module_t mod, int type, void *data) 3142 { 3143 int error = 0; 3144 3145 switch (type) { 3146 case MOD_LOAD: 3147 error = pfsync_init(); 3148 break; 3149 case MOD_UNLOAD: 3150 pfsync_uninit(); 3151 break; 3152 default: 3153 error = EINVAL; 3154 break; 3155 } 3156 3157 return (error); 3158 } 3159 3160 static moduledata_t pfsync_mod = { 3161 pfsyncname, 3162 pfsync_modevent, 3163 0 3164 }; 3165 3166 #define PFSYNC_MODVER 1 3167 3168 /* Stay on FIREWALL as we depend on pf being initialized and on inetdomain. */ 3169 DECLARE_MODULE(pfsync, pfsync_mod, SI_SUB_PROTO_FIREWALL, SI_ORDER_ANY); 3170 MODULE_VERSION(pfsync, PFSYNC_MODVER); 3171 MODULE_DEPEND(pfsync, pf, PF_MODVER, PF_MODVER, PF_MODVER); 3172