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 uint8_t *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 free(b->b_plus, M_PFSYNC); 478 b->b_plus = NULL; 479 b->b_pluslen = 0; 480 481 callout_drain(&b->b_tmo); 482 } 483 484 callout_drain(&sc->sc_bulkfail_tmo); 485 callout_drain(&sc->sc_bulk_tmo); 486 487 if (!(sc->sc_flags & PFSYNCF_OK) && carp_demote_adj_p) 488 (*carp_demote_adj_p)(-V_pfsync_carp_adj, "pfsync destroy"); 489 bpfdetach(ifp); 490 if_detach(ifp); 491 492 pfsync_drop(sc); 493 494 if_free(ifp); 495 pfsync_multicast_cleanup(sc); 496 mtx_destroy(&sc->sc_mtx); 497 mtx_destroy(&sc->sc_bulk_mtx); 498 499 free(sc->sc_buckets, M_PFSYNC); 500 free(sc, M_PFSYNC); 501 502 V_pfsyncif = NULL; 503 } 504 505 static int 506 pfsync_alloc_scrub_memory(struct pfsync_state_peer *s, 507 struct pf_state_peer *d) 508 { 509 if (s->scrub.scrub_flag && d->scrub == NULL) { 510 d->scrub = uma_zalloc(V_pf_state_scrub_z, M_NOWAIT | M_ZERO); 511 if (d->scrub == NULL) 512 return (ENOMEM); 513 } 514 515 return (0); 516 } 517 518 static int 519 pfsync_state_import(union pfsync_state_union *sp, int flags, int msg_version) 520 { 521 struct pfsync_softc *sc = V_pfsyncif; 522 #ifndef __NO_STRICT_ALIGNMENT 523 struct pfsync_state_key key[2]; 524 #endif 525 struct pfsync_state_key *kw, *ks; 526 struct pf_kstate *st = NULL; 527 struct pf_state_key *skw = NULL, *sks = NULL; 528 struct pf_krule *r = NULL; 529 struct pfi_kkif *kif; 530 int error; 531 532 PF_RULES_RASSERT(); 533 534 if (sp->pfs_1301.creatorid == 0) { 535 if (V_pf_status.debug >= PF_DEBUG_MISC) 536 printf("%s: invalid creator id: %08x\n", __func__, 537 ntohl(sp->pfs_1301.creatorid)); 538 return (EINVAL); 539 } 540 541 if ((kif = pfi_kkif_find(sp->pfs_1301.ifname)) == NULL) { 542 if (V_pf_status.debug >= PF_DEBUG_MISC) 543 printf("%s: unknown interface: %s\n", __func__, 544 sp->pfs_1301.ifname); 545 if (flags & PFSYNC_SI_IOCTL) 546 return (EINVAL); 547 return (0); /* skip this state */ 548 } 549 550 /* 551 * If the ruleset checksums match or the state is coming from the ioctl, 552 * it's safe to associate the state with the rule of that number. 553 */ 554 if (sp->pfs_1301.rule != htonl(-1) && sp->pfs_1301.anchor == htonl(-1) && 555 (flags & (PFSYNC_SI_IOCTL | PFSYNC_SI_CKSUM)) && ntohl(sp->pfs_1301.rule) < 556 pf_main_ruleset.rules[PF_RULESET_FILTER].active.rcount) 557 r = pf_main_ruleset.rules[ 558 PF_RULESET_FILTER].active.ptr_array[ntohl(sp->pfs_1301.rule)]; 559 else 560 r = &V_pf_default_rule; 561 562 if ((r->max_states && 563 counter_u64_fetch(r->states_cur) >= r->max_states)) 564 goto cleanup; 565 566 /* 567 * XXXGL: consider M_WAITOK in ioctl path after. 568 */ 569 st = pf_alloc_state(M_NOWAIT); 570 if (__predict_false(st == NULL)) 571 goto cleanup; 572 573 if ((skw = uma_zalloc(V_pf_state_key_z, M_NOWAIT)) == NULL) 574 goto cleanup; 575 576 #ifndef __NO_STRICT_ALIGNMENT 577 bcopy(&sp->pfs_1301.key, key, sizeof(struct pfsync_state_key) * 2); 578 kw = &key[PF_SK_WIRE]; 579 ks = &key[PF_SK_STACK]; 580 #else 581 kw = &sp->pfs_1301.key[PF_SK_WIRE]; 582 ks = &sp->pfs_1301.key[PF_SK_STACK]; 583 #endif 584 585 if (PF_ANEQ(&kw->addr[0], &ks->addr[0], sp->pfs_1301.af) || 586 PF_ANEQ(&kw->addr[1], &ks->addr[1], sp->pfs_1301.af) || 587 kw->port[0] != ks->port[0] || 588 kw->port[1] != ks->port[1]) { 589 sks = uma_zalloc(V_pf_state_key_z, M_NOWAIT); 590 if (sks == NULL) 591 goto cleanup; 592 } else 593 sks = skw; 594 595 /* allocate memory for scrub info */ 596 if (pfsync_alloc_scrub_memory(&sp->pfs_1301.src, &st->src) || 597 pfsync_alloc_scrub_memory(&sp->pfs_1301.dst, &st->dst)) 598 goto cleanup; 599 600 /* Copy to state key(s). */ 601 skw->addr[0] = kw->addr[0]; 602 skw->addr[1] = kw->addr[1]; 603 skw->port[0] = kw->port[0]; 604 skw->port[1] = kw->port[1]; 605 skw->proto = sp->pfs_1301.proto; 606 skw->af = sp->pfs_1301.af; 607 if (sks != skw) { 608 sks->addr[0] = ks->addr[0]; 609 sks->addr[1] = ks->addr[1]; 610 sks->port[0] = ks->port[0]; 611 sks->port[1] = ks->port[1]; 612 sks->proto = sp->pfs_1301.proto; 613 sks->af = sp->pfs_1301.af; 614 } 615 616 /* copy to state */ 617 bcopy(&sp->pfs_1301.rt_addr, &st->rt_addr, sizeof(st->rt_addr)); 618 st->creation = (time_uptime - ntohl(sp->pfs_1301.creation)) * 1000; 619 st->expire = pf_get_uptime(); 620 if (sp->pfs_1301.expire) { 621 uint32_t timeout; 622 623 timeout = r->timeout[sp->pfs_1301.timeout]; 624 if (!timeout) 625 timeout = V_pf_default_rule.timeout[sp->pfs_1301.timeout]; 626 627 /* sp->expire may have been adaptively scaled by export. */ 628 st->expire -= (timeout - ntohl(sp->pfs_1301.expire)) * 1000; 629 } 630 631 st->direction = sp->pfs_1301.direction; 632 st->act.log = sp->pfs_1301.log; 633 st->timeout = sp->pfs_1301.timeout; 634 635 switch (msg_version) { 636 case PFSYNC_MSG_VERSION_1301: 637 st->state_flags = sp->pfs_1301.state_flags; 638 /* 639 * In FreeBSD 13 pfsync lacks many attributes. Copy them 640 * from the rule if possible. If rule can't be matched 641 * clear any set options as we can't recover their 642 * parameters. 643 */ 644 if (r == &V_pf_default_rule) { 645 st->state_flags &= ~PFSTATE_SETMASK; 646 } else { 647 /* 648 * Similar to pf_rule_to_actions(). This code 649 * won't set the actions properly if they come 650 * from multiple "match" rules as only rule 651 * creating the state is send over pfsync. 652 */ 653 st->act.qid = r->qid; 654 st->act.pqid = r->pqid; 655 st->act.rtableid = r->rtableid; 656 if (r->scrub_flags & PFSTATE_SETTOS) 657 st->act.set_tos = r->set_tos; 658 st->act.min_ttl = r->min_ttl; 659 st->act.max_mss = r->max_mss; 660 st->state_flags |= (r->scrub_flags & 661 (PFSTATE_NODF|PFSTATE_RANDOMID| 662 PFSTATE_SETTOS|PFSTATE_SCRUB_TCP| 663 PFSTATE_SETPRIO)); 664 if (r->dnpipe || r->dnrpipe) { 665 if (r->free_flags & PFRULE_DN_IS_PIPE) 666 st->state_flags |= PFSTATE_DN_IS_PIPE; 667 else 668 st->state_flags &= ~PFSTATE_DN_IS_PIPE; 669 } 670 st->act.dnpipe = r->dnpipe; 671 st->act.dnrpipe = r->dnrpipe; 672 } 673 break; 674 case PFSYNC_MSG_VERSION_1400: 675 st->state_flags = ntohs(sp->pfs_1400.state_flags); 676 st->act.qid = ntohs(sp->pfs_1400.qid); 677 st->act.pqid = ntohs(sp->pfs_1400.pqid); 678 st->act.dnpipe = ntohs(sp->pfs_1400.dnpipe); 679 st->act.dnrpipe = ntohs(sp->pfs_1400.dnrpipe); 680 st->act.rtableid = ntohl(sp->pfs_1400.rtableid); 681 st->act.min_ttl = sp->pfs_1400.min_ttl; 682 st->act.set_tos = sp->pfs_1400.set_tos; 683 st->act.max_mss = ntohs(sp->pfs_1400.max_mss); 684 st->act.set_prio[0] = sp->pfs_1400.set_prio[0]; 685 st->act.set_prio[1] = sp->pfs_1400.set_prio[1]; 686 st->rt = sp->pfs_1400.rt; 687 if (st->rt && (st->rt_kif = pfi_kkif_find(sp->pfs_1400.rt_ifname)) == NULL) { 688 if (V_pf_status.debug >= PF_DEBUG_MISC) 689 printf("%s: unknown route interface: %s\n", 690 __func__, sp->pfs_1400.rt_ifname); 691 if (flags & PFSYNC_SI_IOCTL) 692 error = EINVAL; 693 else 694 error = 0; 695 goto cleanup_keys; 696 } 697 break; 698 default: 699 panic("%s: Unsupported pfsync_msg_version %d", 700 __func__, msg_version); 701 } 702 703 st->id = sp->pfs_1301.id; 704 st->creatorid = sp->pfs_1301.creatorid; 705 pf_state_peer_ntoh(&sp->pfs_1301.src, &st->src); 706 pf_state_peer_ntoh(&sp->pfs_1301.dst, &st->dst); 707 708 st->rule.ptr = r; 709 st->nat_rule.ptr = NULL; 710 st->anchor.ptr = NULL; 711 712 st->pfsync_time = time_uptime; 713 st->sync_state = PFSYNC_S_NONE; 714 715 if (!(flags & PFSYNC_SI_IOCTL)) 716 st->state_flags |= PFSTATE_NOSYNC; 717 718 if ((error = pf_state_insert(kif, kif, skw, sks, st)) != 0) 719 goto cleanup_state; 720 721 /* XXX when we have nat_rule/anchors, use STATE_INC_COUNTERS */ 722 counter_u64_add(r->states_cur, 1); 723 counter_u64_add(r->states_tot, 1); 724 725 if (!(flags & PFSYNC_SI_IOCTL)) { 726 st->state_flags &= ~PFSTATE_NOSYNC; 727 if (st->state_flags & PFSTATE_ACK) { 728 struct pfsync_bucket *b = pfsync_get_bucket(sc, st); 729 PFSYNC_BUCKET_LOCK(b); 730 pfsync_q_ins(st, PFSYNC_S_IACK, true); 731 PFSYNC_BUCKET_UNLOCK(b); 732 733 pfsync_push_all(sc); 734 } 735 } 736 st->state_flags &= ~PFSTATE_ACK; 737 PF_STATE_UNLOCK(st); 738 739 return (0); 740 741 cleanup: 742 error = ENOMEM; 743 cleanup_keys: 744 if (skw == sks) 745 sks = NULL; 746 uma_zfree(V_pf_state_key_z, skw); 747 uma_zfree(V_pf_state_key_z, sks); 748 749 cleanup_state: /* pf_state_insert() frees the state keys. */ 750 if (st) { 751 st->timeout = PFTM_UNLINKED; /* appease an assert */ 752 pf_free_state(st); 753 } 754 return (error); 755 } 756 757 #ifdef INET 758 static int 759 pfsync_input(struct mbuf **mp, int *offp __unused, int proto __unused) 760 { 761 struct pfsync_softc *sc = V_pfsyncif; 762 struct mbuf *m = *mp; 763 struct ip *ip = mtod(m, struct ip *); 764 struct pfsync_header *ph; 765 struct pfsync_subheader subh; 766 767 int offset, len, flags = 0; 768 int rv; 769 uint16_t count; 770 771 PF_RULES_RLOCK_TRACKER; 772 773 *mp = NULL; 774 V_pfsyncstats.pfsyncs_ipackets++; 775 776 /* Verify that we have a sync interface configured. */ 777 if (!sc || !sc->sc_sync_if || !V_pf_status.running || 778 (sc->sc_ifp->if_drv_flags & IFF_DRV_RUNNING) == 0) 779 goto done; 780 781 /* verify that the packet came in on the right interface */ 782 if (sc->sc_sync_if != m->m_pkthdr.rcvif) { 783 V_pfsyncstats.pfsyncs_badif++; 784 goto done; 785 } 786 787 if_inc_counter(sc->sc_ifp, IFCOUNTER_IPACKETS, 1); 788 if_inc_counter(sc->sc_ifp, IFCOUNTER_IBYTES, m->m_pkthdr.len); 789 /* verify that the IP TTL is 255. */ 790 if (ip->ip_ttl != PFSYNC_DFLTTL) { 791 V_pfsyncstats.pfsyncs_badttl++; 792 goto done; 793 } 794 795 offset = ip->ip_hl << 2; 796 if (m->m_pkthdr.len < offset + sizeof(*ph)) { 797 V_pfsyncstats.pfsyncs_hdrops++; 798 goto done; 799 } 800 801 if (offset + sizeof(*ph) > m->m_len) { 802 if (m_pullup(m, offset + sizeof(*ph)) == NULL) { 803 V_pfsyncstats.pfsyncs_hdrops++; 804 return (IPPROTO_DONE); 805 } 806 ip = mtod(m, struct ip *); 807 } 808 ph = (struct pfsync_header *)((char *)ip + offset); 809 810 /* verify the version */ 811 if (ph->version != PFSYNC_VERSION) { 812 V_pfsyncstats.pfsyncs_badver++; 813 goto done; 814 } 815 816 len = ntohs(ph->len) + offset; 817 if (m->m_pkthdr.len < len) { 818 V_pfsyncstats.pfsyncs_badlen++; 819 goto done; 820 } 821 822 /* 823 * Trusting pf_chksum during packet processing, as well as seeking 824 * in interface name tree, require holding PF_RULES_RLOCK(). 825 */ 826 PF_RULES_RLOCK(); 827 if (!bcmp(&ph->pfcksum, &V_pf_status.pf_chksum, PF_MD5_DIGEST_LENGTH)) 828 flags = PFSYNC_SI_CKSUM; 829 830 offset += sizeof(*ph); 831 while (offset <= len - sizeof(subh)) { 832 m_copydata(m, offset, sizeof(subh), (caddr_t)&subh); 833 offset += sizeof(subh); 834 835 if (subh.action >= PFSYNC_ACT_MAX) { 836 V_pfsyncstats.pfsyncs_badact++; 837 PF_RULES_RUNLOCK(); 838 goto done; 839 } 840 841 count = ntohs(subh.count); 842 V_pfsyncstats.pfsyncs_iacts[subh.action] += count; 843 rv = (*pfsync_acts[subh.action])(m, offset, count, flags, subh.action); 844 if (rv == -1) { 845 PF_RULES_RUNLOCK(); 846 return (IPPROTO_DONE); 847 } 848 849 offset += rv; 850 } 851 PF_RULES_RUNLOCK(); 852 853 done: 854 m_freem(m); 855 return (IPPROTO_DONE); 856 } 857 #endif 858 859 #ifdef INET6 860 static int 861 pfsync6_input(struct mbuf **mp, int *offp __unused, int proto __unused) 862 { 863 struct pfsync_softc *sc = V_pfsyncif; 864 struct mbuf *m = *mp; 865 struct ip6_hdr *ip6 = mtod(m, struct ip6_hdr *); 866 struct pfsync_header *ph; 867 struct pfsync_subheader subh; 868 869 int offset, len, flags = 0; 870 int rv; 871 uint16_t count; 872 873 PF_RULES_RLOCK_TRACKER; 874 875 *mp = NULL; 876 V_pfsyncstats.pfsyncs_ipackets++; 877 878 /* Verify that we have a sync interface configured. */ 879 if (!sc || !sc->sc_sync_if || !V_pf_status.running || 880 (sc->sc_ifp->if_drv_flags & IFF_DRV_RUNNING) == 0) 881 goto done; 882 883 /* verify that the packet came in on the right interface */ 884 if (sc->sc_sync_if != m->m_pkthdr.rcvif) { 885 V_pfsyncstats.pfsyncs_badif++; 886 goto done; 887 } 888 889 if_inc_counter(sc->sc_ifp, IFCOUNTER_IPACKETS, 1); 890 if_inc_counter(sc->sc_ifp, IFCOUNTER_IBYTES, m->m_pkthdr.len); 891 /* verify that the IP TTL is 255. */ 892 if (ip6->ip6_hlim != PFSYNC_DFLTTL) { 893 V_pfsyncstats.pfsyncs_badttl++; 894 goto done; 895 } 896 897 898 offset = sizeof(*ip6); 899 if (m->m_pkthdr.len < offset + sizeof(*ph)) { 900 V_pfsyncstats.pfsyncs_hdrops++; 901 goto done; 902 } 903 904 if (offset + sizeof(*ph) > m->m_len) { 905 if (m_pullup(m, offset + sizeof(*ph)) == NULL) { 906 V_pfsyncstats.pfsyncs_hdrops++; 907 return (IPPROTO_DONE); 908 } 909 ip6 = mtod(m, struct ip6_hdr *); 910 } 911 ph = (struct pfsync_header *)((char *)ip6 + offset); 912 913 /* verify the version */ 914 if (ph->version != PFSYNC_VERSION) { 915 V_pfsyncstats.pfsyncs_badver++; 916 goto done; 917 } 918 919 len = ntohs(ph->len) + offset; 920 if (m->m_pkthdr.len < len) { 921 V_pfsyncstats.pfsyncs_badlen++; 922 goto done; 923 } 924 925 /* 926 * Trusting pf_chksum during packet processing, as well as seeking 927 * in interface name tree, require holding PF_RULES_RLOCK(). 928 */ 929 PF_RULES_RLOCK(); 930 if (!bcmp(&ph->pfcksum, &V_pf_status.pf_chksum, PF_MD5_DIGEST_LENGTH)) 931 flags = PFSYNC_SI_CKSUM; 932 933 offset += sizeof(*ph); 934 while (offset <= len - sizeof(subh)) { 935 m_copydata(m, offset, sizeof(subh), (caddr_t)&subh); 936 offset += sizeof(subh); 937 938 if (subh.action >= PFSYNC_ACT_MAX) { 939 V_pfsyncstats.pfsyncs_badact++; 940 PF_RULES_RUNLOCK(); 941 goto done; 942 } 943 944 count = ntohs(subh.count); 945 V_pfsyncstats.pfsyncs_iacts[subh.action] += count; 946 rv = (*pfsync_acts[subh.action])(m, offset, count, flags, subh.action); 947 if (rv == -1) { 948 PF_RULES_RUNLOCK(); 949 return (IPPROTO_DONE); 950 } 951 952 offset += rv; 953 } 954 PF_RULES_RUNLOCK(); 955 956 done: 957 m_freem(m); 958 return (IPPROTO_DONE); 959 } 960 #endif 961 962 static int 963 pfsync_in_clr(struct mbuf *m, int offset, int count, int flags, int action) 964 { 965 struct pfsync_clr *clr; 966 struct mbuf *mp; 967 int len = sizeof(*clr) * count; 968 int i, offp; 969 u_int32_t creatorid; 970 971 mp = m_pulldown(m, offset, len, &offp); 972 if (mp == NULL) { 973 V_pfsyncstats.pfsyncs_badlen++; 974 return (-1); 975 } 976 clr = (struct pfsync_clr *)(mp->m_data + offp); 977 978 for (i = 0; i < count; i++) { 979 creatorid = clr[i].creatorid; 980 981 if (clr[i].ifname[0] != '\0' && 982 pfi_kkif_find(clr[i].ifname) == NULL) 983 continue; 984 985 for (int i = 0; i <= pf_hashmask; i++) { 986 struct pf_idhash *ih = &V_pf_idhash[i]; 987 struct pf_kstate *s; 988 relock: 989 PF_HASHROW_LOCK(ih); 990 LIST_FOREACH(s, &ih->states, entry) { 991 if (s->creatorid == creatorid) { 992 s->state_flags |= PFSTATE_NOSYNC; 993 pf_unlink_state(s); 994 goto relock; 995 } 996 } 997 PF_HASHROW_UNLOCK(ih); 998 } 999 } 1000 1001 return (len); 1002 } 1003 1004 static int 1005 pfsync_in_ins(struct mbuf *m, int offset, int count, int flags, int action) 1006 { 1007 struct mbuf *mp; 1008 union pfsync_state_union *sa, *sp; 1009 int i, offp, total_len, msg_version, msg_len; 1010 1011 switch (action) { 1012 case PFSYNC_ACT_INS_1301: 1013 msg_len = sizeof(struct pfsync_state_1301); 1014 total_len = msg_len * count; 1015 msg_version = PFSYNC_MSG_VERSION_1301; 1016 break; 1017 case PFSYNC_ACT_INS_1400: 1018 msg_len = sizeof(struct pfsync_state_1400); 1019 total_len = msg_len * count; 1020 msg_version = PFSYNC_MSG_VERSION_1400; 1021 break; 1022 default: 1023 V_pfsyncstats.pfsyncs_badact++; 1024 return (-1); 1025 } 1026 1027 mp = m_pulldown(m, offset, total_len, &offp); 1028 if (mp == NULL) { 1029 V_pfsyncstats.pfsyncs_badlen++; 1030 return (-1); 1031 } 1032 sa = (union pfsync_state_union *)(mp->m_data + offp); 1033 1034 for (i = 0; i < count; i++) { 1035 sp = (union pfsync_state_union *)((char *)sa + msg_len * i); 1036 1037 /* Check for invalid values. */ 1038 if (sp->pfs_1301.timeout >= PFTM_MAX || 1039 sp->pfs_1301.src.state > PF_TCPS_PROXY_DST || 1040 sp->pfs_1301.dst.state > PF_TCPS_PROXY_DST || 1041 sp->pfs_1301.direction > PF_OUT || 1042 (sp->pfs_1301.af != AF_INET && 1043 sp->pfs_1301.af != AF_INET6)) { 1044 if (V_pf_status.debug >= PF_DEBUG_MISC) 1045 printf("%s: invalid value\n", __func__); 1046 V_pfsyncstats.pfsyncs_badval++; 1047 continue; 1048 } 1049 1050 if (pfsync_state_import(sp, flags, msg_version) == ENOMEM) 1051 /* Drop out, but process the rest of the actions. */ 1052 break; 1053 } 1054 1055 return (total_len); 1056 } 1057 1058 static int 1059 pfsync_in_iack(struct mbuf *m, int offset, int count, int flags, int action) 1060 { 1061 struct pfsync_ins_ack *ia, *iaa; 1062 struct pf_kstate *st; 1063 1064 struct mbuf *mp; 1065 int len = count * sizeof(*ia); 1066 int offp, i; 1067 1068 mp = m_pulldown(m, offset, len, &offp); 1069 if (mp == NULL) { 1070 V_pfsyncstats.pfsyncs_badlen++; 1071 return (-1); 1072 } 1073 iaa = (struct pfsync_ins_ack *)(mp->m_data + offp); 1074 1075 for (i = 0; i < count; i++) { 1076 ia = &iaa[i]; 1077 1078 st = pf_find_state_byid(ia->id, ia->creatorid); 1079 if (st == NULL) 1080 continue; 1081 1082 if (st->state_flags & PFSTATE_ACK) { 1083 pfsync_undefer_state(st, 0); 1084 } 1085 PF_STATE_UNLOCK(st); 1086 } 1087 /* 1088 * XXX this is not yet implemented, but we know the size of the 1089 * message so we can skip it. 1090 */ 1091 1092 return (count * sizeof(struct pfsync_ins_ack)); 1093 } 1094 1095 static int 1096 pfsync_upd_tcp(struct pf_kstate *st, struct pfsync_state_peer *src, 1097 struct pfsync_state_peer *dst) 1098 { 1099 int sync = 0; 1100 1101 PF_STATE_LOCK_ASSERT(st); 1102 1103 /* 1104 * The state should never go backwards except 1105 * for syn-proxy states. Neither should the 1106 * sequence window slide backwards. 1107 */ 1108 if ((st->src.state > src->state && 1109 (st->src.state < PF_TCPS_PROXY_SRC || 1110 src->state >= PF_TCPS_PROXY_SRC)) || 1111 1112 (st->src.state == src->state && 1113 SEQ_GT(st->src.seqlo, ntohl(src->seqlo)))) 1114 sync++; 1115 else 1116 pf_state_peer_ntoh(src, &st->src); 1117 1118 if ((st->dst.state > dst->state) || 1119 1120 (st->dst.state >= TCPS_SYN_SENT && 1121 SEQ_GT(st->dst.seqlo, ntohl(dst->seqlo)))) 1122 sync++; 1123 else 1124 pf_state_peer_ntoh(dst, &st->dst); 1125 1126 return (sync); 1127 } 1128 1129 static int 1130 pfsync_in_upd(struct mbuf *m, int offset, int count, int flags, int action) 1131 { 1132 struct pfsync_softc *sc = V_pfsyncif; 1133 union pfsync_state_union *sa, *sp; 1134 struct pf_kstate *st; 1135 struct mbuf *mp; 1136 int sync, offp, i, total_len, msg_len, msg_version; 1137 1138 switch (action) { 1139 case PFSYNC_ACT_UPD_1301: 1140 msg_len = sizeof(struct pfsync_state_1301); 1141 total_len = msg_len * count; 1142 msg_version = PFSYNC_MSG_VERSION_1301; 1143 break; 1144 case PFSYNC_ACT_UPD_1400: 1145 msg_len = sizeof(struct pfsync_state_1400); 1146 total_len = msg_len * count; 1147 msg_version = PFSYNC_MSG_VERSION_1400; 1148 break; 1149 default: 1150 V_pfsyncstats.pfsyncs_badact++; 1151 return (-1); 1152 } 1153 1154 mp = m_pulldown(m, offset, total_len, &offp); 1155 if (mp == NULL) { 1156 V_pfsyncstats.pfsyncs_badlen++; 1157 return (-1); 1158 } 1159 sa = (union pfsync_state_union *)(mp->m_data + offp); 1160 1161 for (i = 0; i < count; i++) { 1162 sp = (union pfsync_state_union *)((char *)sa + msg_len * i); 1163 1164 /* check for invalid values */ 1165 if (sp->pfs_1301.timeout >= PFTM_MAX || 1166 sp->pfs_1301.src.state > PF_TCPS_PROXY_DST || 1167 sp->pfs_1301.dst.state > PF_TCPS_PROXY_DST) { 1168 if (V_pf_status.debug >= PF_DEBUG_MISC) { 1169 printf("pfsync_input: PFSYNC_ACT_UPD: " 1170 "invalid value\n"); 1171 } 1172 V_pfsyncstats.pfsyncs_badval++; 1173 continue; 1174 } 1175 1176 st = pf_find_state_byid(sp->pfs_1301.id, sp->pfs_1301.creatorid); 1177 if (st == NULL) { 1178 /* insert the update */ 1179 if (pfsync_state_import(sp, flags, msg_version)) 1180 V_pfsyncstats.pfsyncs_badstate++; 1181 continue; 1182 } 1183 1184 if (st->state_flags & PFSTATE_ACK) { 1185 pfsync_undefer_state(st, 1); 1186 } 1187 1188 if (st->key[PF_SK_WIRE]->proto == IPPROTO_TCP) 1189 sync = pfsync_upd_tcp(st, &sp->pfs_1301.src, &sp->pfs_1301.dst); 1190 else { 1191 sync = 0; 1192 1193 /* 1194 * Non-TCP protocol state machine always go 1195 * forwards 1196 */ 1197 if (st->src.state > sp->pfs_1301.src.state) 1198 sync++; 1199 else 1200 pf_state_peer_ntoh(&sp->pfs_1301.src, &st->src); 1201 if (st->dst.state > sp->pfs_1301.dst.state) 1202 sync++; 1203 else 1204 pf_state_peer_ntoh(&sp->pfs_1301.dst, &st->dst); 1205 } 1206 if (sync < 2) { 1207 pfsync_alloc_scrub_memory(&sp->pfs_1301.dst, &st->dst); 1208 pf_state_peer_ntoh(&sp->pfs_1301.dst, &st->dst); 1209 st->expire = pf_get_uptime(); 1210 st->timeout = sp->pfs_1301.timeout; 1211 } 1212 st->pfsync_time = time_uptime; 1213 1214 if (sync) { 1215 V_pfsyncstats.pfsyncs_stale++; 1216 1217 pfsync_update_state(st); 1218 PF_STATE_UNLOCK(st); 1219 pfsync_push_all(sc); 1220 continue; 1221 } 1222 PF_STATE_UNLOCK(st); 1223 } 1224 1225 return (total_len); 1226 } 1227 1228 static int 1229 pfsync_in_upd_c(struct mbuf *m, int offset, int count, int flags, int action) 1230 { 1231 struct pfsync_softc *sc = V_pfsyncif; 1232 struct pfsync_upd_c *ua, *up; 1233 struct pf_kstate *st; 1234 int len = count * sizeof(*up); 1235 int sync; 1236 struct mbuf *mp; 1237 int offp, i; 1238 1239 mp = m_pulldown(m, offset, len, &offp); 1240 if (mp == NULL) { 1241 V_pfsyncstats.pfsyncs_badlen++; 1242 return (-1); 1243 } 1244 ua = (struct pfsync_upd_c *)(mp->m_data + offp); 1245 1246 for (i = 0; i < count; i++) { 1247 up = &ua[i]; 1248 1249 /* check for invalid values */ 1250 if (up->timeout >= PFTM_MAX || 1251 up->src.state > PF_TCPS_PROXY_DST || 1252 up->dst.state > PF_TCPS_PROXY_DST) { 1253 if (V_pf_status.debug >= PF_DEBUG_MISC) { 1254 printf("pfsync_input: " 1255 "PFSYNC_ACT_UPD_C: " 1256 "invalid value\n"); 1257 } 1258 V_pfsyncstats.pfsyncs_badval++; 1259 continue; 1260 } 1261 1262 st = pf_find_state_byid(up->id, up->creatorid); 1263 if (st == NULL) { 1264 /* We don't have this state. Ask for it. */ 1265 PFSYNC_BUCKET_LOCK(&sc->sc_buckets[0]); 1266 pfsync_request_update(up->creatorid, up->id); 1267 PFSYNC_BUCKET_UNLOCK(&sc->sc_buckets[0]); 1268 continue; 1269 } 1270 1271 if (st->state_flags & PFSTATE_ACK) { 1272 pfsync_undefer_state(st, 1); 1273 } 1274 1275 if (st->key[PF_SK_WIRE]->proto == IPPROTO_TCP) 1276 sync = pfsync_upd_tcp(st, &up->src, &up->dst); 1277 else { 1278 sync = 0; 1279 1280 /* 1281 * Non-TCP protocol state machine always go 1282 * forwards 1283 */ 1284 if (st->src.state > up->src.state) 1285 sync++; 1286 else 1287 pf_state_peer_ntoh(&up->src, &st->src); 1288 if (st->dst.state > up->dst.state) 1289 sync++; 1290 else 1291 pf_state_peer_ntoh(&up->dst, &st->dst); 1292 } 1293 if (sync < 2) { 1294 pfsync_alloc_scrub_memory(&up->dst, &st->dst); 1295 pf_state_peer_ntoh(&up->dst, &st->dst); 1296 st->expire = pf_get_uptime(); 1297 st->timeout = up->timeout; 1298 } 1299 st->pfsync_time = time_uptime; 1300 1301 if (sync) { 1302 V_pfsyncstats.pfsyncs_stale++; 1303 1304 pfsync_update_state(st); 1305 PF_STATE_UNLOCK(st); 1306 pfsync_push_all(sc); 1307 continue; 1308 } 1309 PF_STATE_UNLOCK(st); 1310 } 1311 1312 return (len); 1313 } 1314 1315 static int 1316 pfsync_in_ureq(struct mbuf *m, int offset, int count, int flags, int action) 1317 { 1318 struct pfsync_upd_req *ur, *ura; 1319 struct mbuf *mp; 1320 int len = count * sizeof(*ur); 1321 int i, offp; 1322 1323 struct pf_kstate *st; 1324 1325 mp = m_pulldown(m, offset, len, &offp); 1326 if (mp == NULL) { 1327 V_pfsyncstats.pfsyncs_badlen++; 1328 return (-1); 1329 } 1330 ura = (struct pfsync_upd_req *)(mp->m_data + offp); 1331 1332 for (i = 0; i < count; i++) { 1333 ur = &ura[i]; 1334 1335 if (ur->id == 0 && ur->creatorid == 0) 1336 pfsync_bulk_start(); 1337 else { 1338 st = pf_find_state_byid(ur->id, ur->creatorid); 1339 if (st == NULL) { 1340 V_pfsyncstats.pfsyncs_badstate++; 1341 continue; 1342 } 1343 if (st->state_flags & PFSTATE_NOSYNC) { 1344 PF_STATE_UNLOCK(st); 1345 continue; 1346 } 1347 1348 pfsync_update_state_req(st); 1349 PF_STATE_UNLOCK(st); 1350 } 1351 } 1352 1353 return (len); 1354 } 1355 1356 static int 1357 pfsync_in_del_c(struct mbuf *m, int offset, int count, int flags, int action) 1358 { 1359 struct mbuf *mp; 1360 struct pfsync_del_c *sa, *sp; 1361 struct pf_kstate *st; 1362 int len = count * sizeof(*sp); 1363 int offp, i; 1364 1365 mp = m_pulldown(m, offset, len, &offp); 1366 if (mp == NULL) { 1367 V_pfsyncstats.pfsyncs_badlen++; 1368 return (-1); 1369 } 1370 sa = (struct pfsync_del_c *)(mp->m_data + offp); 1371 1372 for (i = 0; i < count; i++) { 1373 sp = &sa[i]; 1374 1375 st = pf_find_state_byid(sp->id, sp->creatorid); 1376 if (st == NULL) { 1377 V_pfsyncstats.pfsyncs_badstate++; 1378 continue; 1379 } 1380 1381 st->state_flags |= PFSTATE_NOSYNC; 1382 pf_unlink_state(st); 1383 } 1384 1385 return (len); 1386 } 1387 1388 static int 1389 pfsync_in_bus(struct mbuf *m, int offset, int count, int flags, int action) 1390 { 1391 struct pfsync_softc *sc = V_pfsyncif; 1392 struct pfsync_bus *bus; 1393 struct mbuf *mp; 1394 int len = count * sizeof(*bus); 1395 int offp; 1396 1397 PFSYNC_BLOCK(sc); 1398 1399 /* If we're not waiting for a bulk update, who cares. */ 1400 if (sc->sc_ureq_sent == 0) { 1401 PFSYNC_BUNLOCK(sc); 1402 return (len); 1403 } 1404 1405 mp = m_pulldown(m, offset, len, &offp); 1406 if (mp == NULL) { 1407 PFSYNC_BUNLOCK(sc); 1408 V_pfsyncstats.pfsyncs_badlen++; 1409 return (-1); 1410 } 1411 bus = (struct pfsync_bus *)(mp->m_data + offp); 1412 1413 switch (bus->status) { 1414 case PFSYNC_BUS_START: 1415 callout_reset(&sc->sc_bulkfail_tmo, 4 * hz + 1416 V_pf_limits[PF_LIMIT_STATES].limit / 1417 ((sc->sc_ifp->if_mtu - PFSYNC_MINPKT) / 1418 sizeof(union pfsync_state_union)), 1419 pfsync_bulk_fail, sc); 1420 if (V_pf_status.debug >= PF_DEBUG_MISC) 1421 printf("pfsync: received bulk update start\n"); 1422 break; 1423 1424 case PFSYNC_BUS_END: 1425 if (time_uptime - ntohl(bus->endtime) >= 1426 sc->sc_ureq_sent) { 1427 /* that's it, we're happy */ 1428 sc->sc_ureq_sent = 0; 1429 sc->sc_bulk_tries = 0; 1430 callout_stop(&sc->sc_bulkfail_tmo); 1431 if (!(sc->sc_flags & PFSYNCF_OK) && carp_demote_adj_p) 1432 (*carp_demote_adj_p)(-V_pfsync_carp_adj, 1433 "pfsync bulk done"); 1434 sc->sc_flags |= PFSYNCF_OK; 1435 if (V_pf_status.debug >= PF_DEBUG_MISC) 1436 printf("pfsync: received valid " 1437 "bulk update end\n"); 1438 } else { 1439 if (V_pf_status.debug >= PF_DEBUG_MISC) 1440 printf("pfsync: received invalid " 1441 "bulk update end: bad timestamp\n"); 1442 } 1443 break; 1444 } 1445 PFSYNC_BUNLOCK(sc); 1446 1447 return (len); 1448 } 1449 1450 static int 1451 pfsync_in_tdb(struct mbuf *m, int offset, int count, int flags, int action) 1452 { 1453 int len = count * sizeof(struct pfsync_tdb); 1454 1455 #if defined(IPSEC) 1456 struct pfsync_tdb *tp; 1457 struct mbuf *mp; 1458 int offp; 1459 int i; 1460 int s; 1461 1462 mp = m_pulldown(m, offset, len, &offp); 1463 if (mp == NULL) { 1464 V_pfsyncstats.pfsyncs_badlen++; 1465 return (-1); 1466 } 1467 tp = (struct pfsync_tdb *)(mp->m_data + offp); 1468 1469 for (i = 0; i < count; i++) 1470 pfsync_update_net_tdb(&tp[i]); 1471 #endif 1472 1473 return (len); 1474 } 1475 1476 #if defined(IPSEC) 1477 /* Update an in-kernel tdb. Silently fail if no tdb is found. */ 1478 static void 1479 pfsync_update_net_tdb(struct pfsync_tdb *pt) 1480 { 1481 struct tdb *tdb; 1482 int s; 1483 1484 /* check for invalid values */ 1485 if (ntohl(pt->spi) <= SPI_RESERVED_MAX || 1486 (pt->dst.sa.sa_family != AF_INET && 1487 pt->dst.sa.sa_family != AF_INET6)) 1488 goto bad; 1489 1490 tdb = gettdb(pt->spi, &pt->dst, pt->sproto); 1491 if (tdb) { 1492 pt->rpl = ntohl(pt->rpl); 1493 pt->cur_bytes = (unsigned long long)be64toh(pt->cur_bytes); 1494 1495 /* Neither replay nor byte counter should ever decrease. */ 1496 if (pt->rpl < tdb->tdb_rpl || 1497 pt->cur_bytes < tdb->tdb_cur_bytes) { 1498 goto bad; 1499 } 1500 1501 tdb->tdb_rpl = pt->rpl; 1502 tdb->tdb_cur_bytes = pt->cur_bytes; 1503 } 1504 return; 1505 1506 bad: 1507 if (V_pf_status.debug >= PF_DEBUG_MISC) 1508 printf("pfsync_insert: PFSYNC_ACT_TDB_UPD: " 1509 "invalid value\n"); 1510 V_pfsyncstats.pfsyncs_badstate++; 1511 return; 1512 } 1513 #endif 1514 1515 static int 1516 pfsync_in_eof(struct mbuf *m, int offset, int count, int flags, int action) 1517 { 1518 /* check if we are at the right place in the packet */ 1519 if (offset != m->m_pkthdr.len) 1520 V_pfsyncstats.pfsyncs_badlen++; 1521 1522 /* we're done. free and let the caller return */ 1523 m_freem(m); 1524 return (-1); 1525 } 1526 1527 static int 1528 pfsync_in_error(struct mbuf *m, int offset, int count, int flags, int action) 1529 { 1530 V_pfsyncstats.pfsyncs_badact++; 1531 1532 m_freem(m); 1533 return (-1); 1534 } 1535 1536 static int 1537 pfsyncoutput(struct ifnet *ifp, struct mbuf *m, const struct sockaddr *dst, 1538 struct route *rt) 1539 { 1540 m_freem(m); 1541 return (0); 1542 } 1543 1544 /* ARGSUSED */ 1545 static int 1546 pfsyncioctl(struct ifnet *ifp, u_long cmd, caddr_t data) 1547 { 1548 struct pfsync_softc *sc = ifp->if_softc; 1549 struct ifreq *ifr = (struct ifreq *)data; 1550 struct pfsyncreq pfsyncr; 1551 size_t nvbuflen; 1552 int error; 1553 int c; 1554 1555 switch (cmd) { 1556 case SIOCSIFFLAGS: 1557 PFSYNC_LOCK(sc); 1558 if (ifp->if_flags & IFF_UP) { 1559 ifp->if_drv_flags |= IFF_DRV_RUNNING; 1560 PFSYNC_UNLOCK(sc); 1561 pfsync_pointers_init(); 1562 } else { 1563 ifp->if_drv_flags &= ~IFF_DRV_RUNNING; 1564 PFSYNC_UNLOCK(sc); 1565 pfsync_pointers_uninit(); 1566 } 1567 break; 1568 case SIOCSIFMTU: 1569 if (!sc->sc_sync_if || 1570 ifr->ifr_mtu <= PFSYNC_MINPKT || 1571 ifr->ifr_mtu > sc->sc_sync_if->if_mtu) 1572 return (EINVAL); 1573 if (ifr->ifr_mtu < ifp->if_mtu) { 1574 for (c = 0; c < pfsync_buckets; c++) { 1575 PFSYNC_BUCKET_LOCK(&sc->sc_buckets[c]); 1576 if (sc->sc_buckets[c].b_len > PFSYNC_MINPKT) 1577 pfsync_sendout(1, c); 1578 PFSYNC_BUCKET_UNLOCK(&sc->sc_buckets[c]); 1579 } 1580 } 1581 ifp->if_mtu = ifr->ifr_mtu; 1582 break; 1583 case SIOCGETPFSYNC: 1584 bzero(&pfsyncr, sizeof(pfsyncr)); 1585 PFSYNC_LOCK(sc); 1586 if (sc->sc_sync_if) { 1587 strlcpy(pfsyncr.pfsyncr_syncdev, 1588 sc->sc_sync_if->if_xname, IFNAMSIZ); 1589 } 1590 pfsyncr.pfsyncr_syncpeer = ((struct sockaddr_in *)&sc->sc_sync_peer)->sin_addr; 1591 pfsyncr.pfsyncr_maxupdates = sc->sc_maxupdates; 1592 pfsyncr.pfsyncr_defer = sc->sc_flags; 1593 PFSYNC_UNLOCK(sc); 1594 return (copyout(&pfsyncr, ifr_data_get_ptr(ifr), 1595 sizeof(pfsyncr))); 1596 1597 case SIOCGETPFSYNCNV: 1598 { 1599 nvlist_t *nvl_syncpeer; 1600 nvlist_t *nvl = nvlist_create(0); 1601 1602 if (nvl == NULL) 1603 return (ENOMEM); 1604 1605 if (sc->sc_sync_if) 1606 nvlist_add_string(nvl, "syncdev", sc->sc_sync_if->if_xname); 1607 nvlist_add_number(nvl, "maxupdates", sc->sc_maxupdates); 1608 nvlist_add_number(nvl, "flags", sc->sc_flags); 1609 nvlist_add_number(nvl, "version", sc->sc_version); 1610 if ((nvl_syncpeer = pfsync_sockaddr_to_syncpeer_nvlist(&sc->sc_sync_peer)) != NULL) 1611 nvlist_add_nvlist(nvl, "syncpeer", nvl_syncpeer); 1612 1613 void *packed = NULL; 1614 packed = nvlist_pack(nvl, &nvbuflen); 1615 if (packed == NULL) { 1616 free(packed, M_NVLIST); 1617 nvlist_destroy(nvl); 1618 return (ENOMEM); 1619 } 1620 1621 if (nvbuflen > ifr->ifr_cap_nv.buf_length) { 1622 ifr->ifr_cap_nv.length = nvbuflen; 1623 ifr->ifr_cap_nv.buffer = NULL; 1624 free(packed, M_NVLIST); 1625 nvlist_destroy(nvl); 1626 return (EFBIG); 1627 } 1628 1629 ifr->ifr_cap_nv.length = nvbuflen; 1630 error = copyout(packed, ifr->ifr_cap_nv.buffer, nvbuflen); 1631 1632 nvlist_destroy(nvl); 1633 nvlist_destroy(nvl_syncpeer); 1634 free(packed, M_NVLIST); 1635 break; 1636 } 1637 1638 case SIOCSETPFSYNC: 1639 { 1640 struct pfsync_kstatus status; 1641 1642 if ((error = priv_check(curthread, PRIV_NETINET_PF)) != 0) 1643 return (error); 1644 if ((error = copyin(ifr_data_get_ptr(ifr), &pfsyncr, 1645 sizeof(pfsyncr)))) 1646 return (error); 1647 1648 memset((char *)&status, 0, sizeof(struct pfsync_kstatus)); 1649 pfsync_pfsyncreq_to_kstatus(&pfsyncr, &status); 1650 1651 error = pfsync_kstatus_to_softc(&status, sc); 1652 return (error); 1653 } 1654 case SIOCSETPFSYNCNV: 1655 { 1656 struct pfsync_kstatus status; 1657 void *data; 1658 nvlist_t *nvl; 1659 1660 if ((error = priv_check(curthread, PRIV_NETINET_PF)) != 0) 1661 return (error); 1662 if (ifr->ifr_cap_nv.length > IFR_CAP_NV_MAXBUFSIZE) 1663 return (EINVAL); 1664 1665 data = malloc(ifr->ifr_cap_nv.length, M_TEMP, M_WAITOK); 1666 1667 if ((error = copyin(ifr->ifr_cap_nv.buffer, data, 1668 ifr->ifr_cap_nv.length)) != 0) { 1669 free(data, M_TEMP); 1670 return (error); 1671 } 1672 1673 if ((nvl = nvlist_unpack(data, ifr->ifr_cap_nv.length, 0)) == NULL) { 1674 free(data, M_TEMP); 1675 return (EINVAL); 1676 } 1677 1678 memset((char *)&status, 0, sizeof(struct pfsync_kstatus)); 1679 pfsync_nvstatus_to_kstatus(nvl, &status); 1680 1681 nvlist_destroy(nvl); 1682 free(data, M_TEMP); 1683 1684 error = pfsync_kstatus_to_softc(&status, sc); 1685 return (error); 1686 } 1687 default: 1688 return (ENOTTY); 1689 } 1690 1691 return (0); 1692 } 1693 1694 static void 1695 pfsync_out_state_1301(struct pf_kstate *st, void *buf) 1696 { 1697 union pfsync_state_union *sp = buf; 1698 1699 pfsync_state_export(sp, st, PFSYNC_MSG_VERSION_1301); 1700 } 1701 1702 static void 1703 pfsync_out_state_1400(struct pf_kstate *st, void *buf) 1704 { 1705 union pfsync_state_union *sp = buf; 1706 1707 pfsync_state_export(sp, st, PFSYNC_MSG_VERSION_1400); 1708 } 1709 1710 static void 1711 pfsync_out_iack(struct pf_kstate *st, void *buf) 1712 { 1713 struct pfsync_ins_ack *iack = buf; 1714 1715 iack->id = st->id; 1716 iack->creatorid = st->creatorid; 1717 } 1718 1719 static void 1720 pfsync_out_upd_c(struct pf_kstate *st, void *buf) 1721 { 1722 struct pfsync_upd_c *up = buf; 1723 1724 bzero(up, sizeof(*up)); 1725 up->id = st->id; 1726 pf_state_peer_hton(&st->src, &up->src); 1727 pf_state_peer_hton(&st->dst, &up->dst); 1728 up->creatorid = st->creatorid; 1729 up->timeout = st->timeout; 1730 } 1731 1732 static void 1733 pfsync_out_del_c(struct pf_kstate *st, void *buf) 1734 { 1735 struct pfsync_del_c *dp = buf; 1736 1737 dp->id = st->id; 1738 dp->creatorid = st->creatorid; 1739 st->state_flags |= PFSTATE_NOSYNC; 1740 } 1741 1742 static void 1743 pfsync_drop(struct pfsync_softc *sc) 1744 { 1745 struct pf_kstate *st, *next; 1746 struct pfsync_upd_req_item *ur; 1747 struct pfsync_bucket *b; 1748 int c; 1749 enum pfsync_q_id q; 1750 1751 for (c = 0; c < pfsync_buckets; c++) { 1752 b = &sc->sc_buckets[c]; 1753 for (q = 0; q < PFSYNC_Q_COUNT; q++) { 1754 if (TAILQ_EMPTY(&b->b_qs[q])) 1755 continue; 1756 1757 TAILQ_FOREACH_SAFE(st, &b->b_qs[q], sync_list, next) { 1758 KASSERT(st->sync_state == pfsync_qid_sstate[q], 1759 ("%s: st->sync_state == q", 1760 __func__)); 1761 st->sync_state = PFSYNC_S_NONE; 1762 pf_release_state(st); 1763 } 1764 TAILQ_INIT(&b->b_qs[q]); 1765 } 1766 1767 while ((ur = TAILQ_FIRST(&b->b_upd_req_list)) != NULL) { 1768 TAILQ_REMOVE(&b->b_upd_req_list, ur, ur_entry); 1769 free(ur, M_PFSYNC); 1770 } 1771 1772 b->b_len = PFSYNC_MINPKT; 1773 free(b->b_plus, M_PFSYNC); 1774 b->b_plus = NULL; 1775 b->b_pluslen = 0; 1776 } 1777 } 1778 1779 static void 1780 pfsync_sendout(int schedswi, int c) 1781 { 1782 struct pfsync_softc *sc = V_pfsyncif; 1783 struct ifnet *ifp = sc->sc_ifp; 1784 struct mbuf *m; 1785 struct pfsync_header *ph; 1786 struct pfsync_subheader *subh; 1787 struct pf_kstate *st, *st_next; 1788 struct pfsync_upd_req_item *ur; 1789 struct pfsync_bucket *b = &sc->sc_buckets[c]; 1790 size_t len; 1791 int aflen, offset, count = 0; 1792 enum pfsync_q_id q; 1793 1794 KASSERT(sc != NULL, ("%s: null sc", __func__)); 1795 KASSERT(b->b_len > PFSYNC_MINPKT, 1796 ("%s: sc_len %zu", __func__, b->b_len)); 1797 PFSYNC_BUCKET_LOCK_ASSERT(b); 1798 1799 if (ifp->if_bpf == NULL && sc->sc_sync_if == NULL) { 1800 pfsync_drop(sc); 1801 return; 1802 } 1803 1804 m = m_get2(max_linkhdr + b->b_len, M_NOWAIT, MT_DATA, M_PKTHDR); 1805 if (m == NULL) { 1806 if_inc_counter(sc->sc_ifp, IFCOUNTER_OERRORS, 1); 1807 V_pfsyncstats.pfsyncs_onomem++; 1808 return; 1809 } 1810 m->m_data += max_linkhdr; 1811 bzero(m->m_data, b->b_len); 1812 1813 len = b->b_len; 1814 1815 /* build the ip header */ 1816 switch (sc->sc_sync_peer.ss_family) { 1817 #ifdef INET 1818 case AF_INET: 1819 { 1820 struct ip *ip; 1821 1822 ip = mtod(m, struct ip *); 1823 bcopy(&sc->sc_template.ipv4, ip, sizeof(*ip)); 1824 aflen = offset = sizeof(*ip); 1825 1826 len -= sizeof(union inet_template) - sizeof(struct ip); 1827 ip->ip_len = htons(len); 1828 ip_fillid(ip); 1829 break; 1830 } 1831 #endif 1832 #ifdef INET6 1833 case AF_INET6: 1834 { 1835 struct ip6_hdr *ip6; 1836 1837 ip6 = mtod(m, struct ip6_hdr *); 1838 bcopy(&sc->sc_template.ipv6, ip6, sizeof(*ip6)); 1839 aflen = offset = sizeof(*ip6); 1840 1841 len -= sizeof(union inet_template) - sizeof(struct ip6_hdr); 1842 ip6->ip6_plen = htons(len); 1843 break; 1844 } 1845 #endif 1846 default: 1847 m_freem(m); 1848 return; 1849 } 1850 m->m_len = m->m_pkthdr.len = len; 1851 1852 /* build the pfsync header */ 1853 ph = (struct pfsync_header *)(m->m_data + offset); 1854 offset += sizeof(*ph); 1855 1856 ph->version = PFSYNC_VERSION; 1857 ph->len = htons(len - aflen); 1858 bcopy(V_pf_status.pf_chksum, ph->pfcksum, PF_MD5_DIGEST_LENGTH); 1859 1860 /* walk the queues */ 1861 for (q = 0; q < PFSYNC_Q_COUNT; q++) { 1862 if (TAILQ_EMPTY(&b->b_qs[q])) 1863 continue; 1864 1865 subh = (struct pfsync_subheader *)(m->m_data + offset); 1866 offset += sizeof(*subh); 1867 1868 count = 0; 1869 TAILQ_FOREACH_SAFE(st, &b->b_qs[q], sync_list, st_next) { 1870 KASSERT(st->sync_state == pfsync_qid_sstate[q], 1871 ("%s: st->sync_state == q", 1872 __func__)); 1873 /* 1874 * XXXGL: some of write methods do unlocked reads 1875 * of state data :( 1876 */ 1877 pfsync_qs[q].write(st, m->m_data + offset); 1878 offset += pfsync_qs[q].len; 1879 st->sync_state = PFSYNC_S_NONE; 1880 pf_release_state(st); 1881 count++; 1882 } 1883 TAILQ_INIT(&b->b_qs[q]); 1884 1885 subh->action = pfsync_qs[q].action; 1886 subh->count = htons(count); 1887 V_pfsyncstats.pfsyncs_oacts[pfsync_qs[q].action] += count; 1888 } 1889 1890 if (!TAILQ_EMPTY(&b->b_upd_req_list)) { 1891 subh = (struct pfsync_subheader *)(m->m_data + offset); 1892 offset += sizeof(*subh); 1893 1894 count = 0; 1895 while ((ur = TAILQ_FIRST(&b->b_upd_req_list)) != NULL) { 1896 TAILQ_REMOVE(&b->b_upd_req_list, ur, ur_entry); 1897 1898 bcopy(&ur->ur_msg, m->m_data + offset, 1899 sizeof(ur->ur_msg)); 1900 offset += sizeof(ur->ur_msg); 1901 free(ur, M_PFSYNC); 1902 count++; 1903 } 1904 1905 subh->action = PFSYNC_ACT_UPD_REQ; 1906 subh->count = htons(count); 1907 V_pfsyncstats.pfsyncs_oacts[PFSYNC_ACT_UPD_REQ] += count; 1908 } 1909 1910 /* has someone built a custom region for us to add? */ 1911 if (b->b_plus != NULL) { 1912 bcopy(b->b_plus, m->m_data + offset, b->b_pluslen); 1913 offset += b->b_pluslen; 1914 1915 free(b->b_plus, M_PFSYNC); 1916 b->b_plus = NULL; 1917 b->b_pluslen = 0; 1918 } 1919 1920 subh = (struct pfsync_subheader *)(m->m_data + offset); 1921 offset += sizeof(*subh); 1922 1923 subh->action = PFSYNC_ACT_EOF; 1924 subh->count = htons(1); 1925 V_pfsyncstats.pfsyncs_oacts[PFSYNC_ACT_EOF]++; 1926 1927 /* we're done, let's put it on the wire */ 1928 if (ifp->if_bpf) { 1929 m->m_data += aflen; 1930 m->m_len = m->m_pkthdr.len = len - aflen; 1931 BPF_MTAP(ifp, m); 1932 m->m_data -= aflen; 1933 m->m_len = m->m_pkthdr.len = len; 1934 } 1935 1936 if (sc->sc_sync_if == NULL) { 1937 b->b_len = PFSYNC_MINPKT; 1938 m_freem(m); 1939 return; 1940 } 1941 1942 if_inc_counter(sc->sc_ifp, IFCOUNTER_OPACKETS, 1); 1943 if_inc_counter(sc->sc_ifp, IFCOUNTER_OBYTES, m->m_pkthdr.len); 1944 b->b_len = PFSYNC_MINPKT; 1945 1946 if (!_IF_QFULL(&b->b_snd)) 1947 _IF_ENQUEUE(&b->b_snd, m); 1948 else { 1949 m_freem(m); 1950 if_inc_counter(sc->sc_ifp, IFCOUNTER_OQDROPS, 1); 1951 } 1952 if (schedswi) 1953 swi_sched(V_pfsync_swi_cookie, 0); 1954 } 1955 1956 static void 1957 pfsync_insert_state(struct pf_kstate *st) 1958 { 1959 struct pfsync_softc *sc = V_pfsyncif; 1960 struct pfsync_bucket *b = pfsync_get_bucket(sc, st); 1961 1962 if (st->state_flags & PFSTATE_NOSYNC) 1963 return; 1964 1965 if ((st->rule.ptr->rule_flag & PFRULE_NOSYNC) || 1966 st->key[PF_SK_WIRE]->proto == IPPROTO_PFSYNC) { 1967 st->state_flags |= PFSTATE_NOSYNC; 1968 return; 1969 } 1970 1971 KASSERT(st->sync_state == PFSYNC_S_NONE, 1972 ("%s: st->sync_state %u", __func__, st->sync_state)); 1973 1974 PFSYNC_BUCKET_LOCK(b); 1975 if (b->b_len == PFSYNC_MINPKT) 1976 callout_reset(&b->b_tmo, 1 * hz, pfsync_timeout, b); 1977 1978 pfsync_q_ins(st, PFSYNC_S_INS, true); 1979 PFSYNC_BUCKET_UNLOCK(b); 1980 1981 st->sync_updates = 0; 1982 } 1983 1984 static int 1985 pfsync_defer(struct pf_kstate *st, struct mbuf *m) 1986 { 1987 struct pfsync_softc *sc = V_pfsyncif; 1988 struct pfsync_deferral *pd; 1989 struct pfsync_bucket *b; 1990 1991 if (m->m_flags & (M_BCAST|M_MCAST)) 1992 return (0); 1993 1994 if (sc == NULL) 1995 return (0); 1996 1997 b = pfsync_get_bucket(sc, st); 1998 1999 PFSYNC_LOCK(sc); 2000 2001 if (!(sc->sc_ifp->if_drv_flags & IFF_DRV_RUNNING) || 2002 !(sc->sc_flags & PFSYNCF_DEFER)) { 2003 PFSYNC_UNLOCK(sc); 2004 return (0); 2005 } 2006 2007 PFSYNC_BUCKET_LOCK(b); 2008 PFSYNC_UNLOCK(sc); 2009 2010 if (b->b_deferred >= 128) 2011 pfsync_undefer(TAILQ_FIRST(&b->b_deferrals), 0); 2012 2013 pd = malloc(sizeof(*pd), M_PFSYNC, M_NOWAIT); 2014 if (pd == NULL) { 2015 PFSYNC_BUCKET_UNLOCK(b); 2016 return (0); 2017 } 2018 b->b_deferred++; 2019 2020 m->m_flags |= M_SKIP_FIREWALL; 2021 st->state_flags |= PFSTATE_ACK; 2022 2023 pd->pd_sc = sc; 2024 pd->pd_st = st; 2025 pf_ref_state(st); 2026 pd->pd_m = m; 2027 2028 TAILQ_INSERT_TAIL(&b->b_deferrals, pd, pd_entry); 2029 callout_init_mtx(&pd->pd_tmo, &b->b_mtx, CALLOUT_RETURNUNLOCKED); 2030 callout_reset(&pd->pd_tmo, (V_pfsync_defer_timeout * hz) / 1000, 2031 pfsync_defer_tmo, pd); 2032 2033 pfsync_push(b); 2034 PFSYNC_BUCKET_UNLOCK(b); 2035 2036 return (1); 2037 } 2038 2039 static void 2040 pfsync_undefer(struct pfsync_deferral *pd, int drop) 2041 { 2042 struct pfsync_softc *sc = pd->pd_sc; 2043 struct mbuf *m = pd->pd_m; 2044 struct pf_kstate *st = pd->pd_st; 2045 struct pfsync_bucket *b = pfsync_get_bucket(sc, st); 2046 2047 PFSYNC_BUCKET_LOCK_ASSERT(b); 2048 2049 TAILQ_REMOVE(&b->b_deferrals, pd, pd_entry); 2050 b->b_deferred--; 2051 pd->pd_st->state_flags &= ~PFSTATE_ACK; /* XXX: locking! */ 2052 free(pd, M_PFSYNC); 2053 pf_release_state(st); 2054 2055 if (drop) 2056 m_freem(m); 2057 else { 2058 _IF_ENQUEUE(&b->b_snd, m); 2059 pfsync_push(b); 2060 } 2061 } 2062 2063 static void 2064 pfsync_defer_tmo(void *arg) 2065 { 2066 struct epoch_tracker et; 2067 struct pfsync_deferral *pd = arg; 2068 struct pfsync_softc *sc = pd->pd_sc; 2069 struct mbuf *m = pd->pd_m; 2070 struct pf_kstate *st = pd->pd_st; 2071 struct pfsync_bucket *b = pfsync_get_bucket(sc, st); 2072 2073 PFSYNC_BUCKET_LOCK_ASSERT(b); 2074 2075 TAILQ_REMOVE(&b->b_deferrals, pd, pd_entry); 2076 b->b_deferred--; 2077 pd->pd_st->state_flags &= ~PFSTATE_ACK; /* XXX: locking! */ 2078 PFSYNC_BUCKET_UNLOCK(b); 2079 free(pd, M_PFSYNC); 2080 2081 if (sc->sc_sync_if == NULL) { 2082 pf_release_state(st); 2083 m_freem(m); 2084 return; 2085 } 2086 2087 NET_EPOCH_ENTER(et); 2088 CURVNET_SET(sc->sc_sync_if->if_vnet); 2089 2090 pfsync_tx(sc, m); 2091 2092 pf_release_state(st); 2093 2094 CURVNET_RESTORE(); 2095 NET_EPOCH_EXIT(et); 2096 } 2097 2098 static void 2099 pfsync_undefer_state_locked(struct pf_kstate *st, int drop) 2100 { 2101 struct pfsync_softc *sc = V_pfsyncif; 2102 struct pfsync_deferral *pd; 2103 struct pfsync_bucket *b = pfsync_get_bucket(sc, st); 2104 2105 PFSYNC_BUCKET_LOCK_ASSERT(b); 2106 2107 TAILQ_FOREACH(pd, &b->b_deferrals, pd_entry) { 2108 if (pd->pd_st == st) { 2109 if (callout_stop(&pd->pd_tmo) > 0) 2110 pfsync_undefer(pd, drop); 2111 2112 return; 2113 } 2114 } 2115 2116 panic("%s: unable to find deferred state", __func__); 2117 } 2118 2119 static void 2120 pfsync_undefer_state(struct pf_kstate *st, int drop) 2121 { 2122 struct pfsync_softc *sc = V_pfsyncif; 2123 struct pfsync_bucket *b = pfsync_get_bucket(sc, st); 2124 2125 PFSYNC_BUCKET_LOCK(b); 2126 pfsync_undefer_state_locked(st, drop); 2127 PFSYNC_BUCKET_UNLOCK(b); 2128 } 2129 2130 static struct pfsync_bucket* 2131 pfsync_get_bucket(struct pfsync_softc *sc, struct pf_kstate *st) 2132 { 2133 int c = PF_IDHASH(st) % pfsync_buckets; 2134 return &sc->sc_buckets[c]; 2135 } 2136 2137 static void 2138 pfsync_update_state(struct pf_kstate *st) 2139 { 2140 struct pfsync_softc *sc = V_pfsyncif; 2141 bool sync = false, ref = true; 2142 struct pfsync_bucket *b = pfsync_get_bucket(sc, st); 2143 2144 PF_STATE_LOCK_ASSERT(st); 2145 PFSYNC_BUCKET_LOCK(b); 2146 2147 if (st->state_flags & PFSTATE_ACK) 2148 pfsync_undefer_state_locked(st, 0); 2149 if (st->state_flags & PFSTATE_NOSYNC) { 2150 if (st->sync_state != PFSYNC_S_NONE) 2151 pfsync_q_del(st, true, b); 2152 PFSYNC_BUCKET_UNLOCK(b); 2153 return; 2154 } 2155 2156 if (b->b_len == PFSYNC_MINPKT) 2157 callout_reset(&b->b_tmo, 1 * hz, pfsync_timeout, b); 2158 2159 switch (st->sync_state) { 2160 case PFSYNC_S_UPD_C: 2161 case PFSYNC_S_UPD: 2162 case PFSYNC_S_INS: 2163 /* we're already handling it */ 2164 2165 if (st->key[PF_SK_WIRE]->proto == IPPROTO_TCP) { 2166 st->sync_updates++; 2167 if (st->sync_updates >= sc->sc_maxupdates) 2168 sync = true; 2169 } 2170 break; 2171 2172 case PFSYNC_S_IACK: 2173 pfsync_q_del(st, false, b); 2174 ref = false; 2175 /* FALLTHROUGH */ 2176 2177 case PFSYNC_S_NONE: 2178 pfsync_q_ins(st, PFSYNC_S_UPD_C, ref); 2179 st->sync_updates = 0; 2180 break; 2181 2182 default: 2183 panic("%s: unexpected sync state %d", __func__, st->sync_state); 2184 } 2185 2186 if (sync || (time_uptime - st->pfsync_time) < 2) 2187 pfsync_push(b); 2188 2189 PFSYNC_BUCKET_UNLOCK(b); 2190 } 2191 2192 static void 2193 pfsync_request_update(u_int32_t creatorid, u_int64_t id) 2194 { 2195 struct pfsync_softc *sc = V_pfsyncif; 2196 struct pfsync_bucket *b = &sc->sc_buckets[0]; 2197 struct pfsync_upd_req_item *item; 2198 size_t nlen = sizeof(struct pfsync_upd_req); 2199 2200 PFSYNC_BUCKET_LOCK_ASSERT(b); 2201 2202 /* 2203 * This code does a bit to prevent multiple update requests for the 2204 * same state being generated. It searches current subheader queue, 2205 * but it doesn't lookup into queue of already packed datagrams. 2206 */ 2207 TAILQ_FOREACH(item, &b->b_upd_req_list, ur_entry) 2208 if (item->ur_msg.id == id && 2209 item->ur_msg.creatorid == creatorid) 2210 return; 2211 2212 item = malloc(sizeof(*item), M_PFSYNC, M_NOWAIT); 2213 if (item == NULL) 2214 return; /* XXX stats */ 2215 2216 item->ur_msg.id = id; 2217 item->ur_msg.creatorid = creatorid; 2218 2219 if (TAILQ_EMPTY(&b->b_upd_req_list)) 2220 nlen += sizeof(struct pfsync_subheader); 2221 2222 if (b->b_len + nlen > sc->sc_ifp->if_mtu) { 2223 pfsync_sendout(0, 0); 2224 2225 nlen = sizeof(struct pfsync_subheader) + 2226 sizeof(struct pfsync_upd_req); 2227 } 2228 2229 TAILQ_INSERT_TAIL(&b->b_upd_req_list, item, ur_entry); 2230 b->b_len += nlen; 2231 2232 pfsync_push(b); 2233 } 2234 2235 static bool 2236 pfsync_update_state_req(struct pf_kstate *st) 2237 { 2238 struct pfsync_softc *sc = V_pfsyncif; 2239 bool ref = true, full = false; 2240 struct pfsync_bucket *b = pfsync_get_bucket(sc, st); 2241 2242 PF_STATE_LOCK_ASSERT(st); 2243 PFSYNC_BUCKET_LOCK(b); 2244 2245 if (st->state_flags & PFSTATE_NOSYNC) { 2246 if (st->sync_state != PFSYNC_S_NONE) 2247 pfsync_q_del(st, true, b); 2248 PFSYNC_BUCKET_UNLOCK(b); 2249 return (full); 2250 } 2251 2252 switch (st->sync_state) { 2253 case PFSYNC_S_UPD_C: 2254 case PFSYNC_S_IACK: 2255 pfsync_q_del(st, false, b); 2256 ref = false; 2257 /* FALLTHROUGH */ 2258 2259 case PFSYNC_S_NONE: 2260 pfsync_q_ins(st, PFSYNC_S_UPD, ref); 2261 pfsync_push(b); 2262 break; 2263 2264 case PFSYNC_S_INS: 2265 case PFSYNC_S_UPD: 2266 case PFSYNC_S_DEL_C: 2267 /* we're already handling it */ 2268 break; 2269 2270 default: 2271 panic("%s: unexpected sync state %d", __func__, st->sync_state); 2272 } 2273 2274 if ((sc->sc_ifp->if_mtu - b->b_len) < sizeof(union pfsync_state_union)) 2275 full = true; 2276 2277 PFSYNC_BUCKET_UNLOCK(b); 2278 2279 return (full); 2280 } 2281 2282 static void 2283 pfsync_delete_state(struct pf_kstate *st) 2284 { 2285 struct pfsync_softc *sc = V_pfsyncif; 2286 struct pfsync_bucket *b = pfsync_get_bucket(sc, st); 2287 bool ref = true; 2288 2289 PFSYNC_BUCKET_LOCK(b); 2290 if (st->state_flags & PFSTATE_ACK) 2291 pfsync_undefer_state_locked(st, 1); 2292 if (st->state_flags & PFSTATE_NOSYNC) { 2293 if (st->sync_state != PFSYNC_S_NONE) 2294 pfsync_q_del(st, true, b); 2295 PFSYNC_BUCKET_UNLOCK(b); 2296 return; 2297 } 2298 2299 if (b->b_len == PFSYNC_MINPKT) 2300 callout_reset(&b->b_tmo, 1 * hz, pfsync_timeout, b); 2301 2302 switch (st->sync_state) { 2303 case PFSYNC_S_INS: 2304 /* We never got to tell the world so just forget about it. */ 2305 pfsync_q_del(st, true, b); 2306 break; 2307 2308 case PFSYNC_S_UPD_C: 2309 case PFSYNC_S_UPD: 2310 case PFSYNC_S_IACK: 2311 pfsync_q_del(st, false, b); 2312 ref = false; 2313 /* FALLTHROUGH */ 2314 2315 case PFSYNC_S_NONE: 2316 pfsync_q_ins(st, PFSYNC_S_DEL_C, ref); 2317 break; 2318 2319 default: 2320 panic("%s: unexpected sync state %d", __func__, st->sync_state); 2321 } 2322 2323 PFSYNC_BUCKET_UNLOCK(b); 2324 } 2325 2326 static void 2327 pfsync_clear_states(u_int32_t creatorid, const char *ifname) 2328 { 2329 struct { 2330 struct pfsync_subheader subh; 2331 struct pfsync_clr clr; 2332 } __packed r; 2333 2334 bzero(&r, sizeof(r)); 2335 2336 r.subh.action = PFSYNC_ACT_CLR; 2337 r.subh.count = htons(1); 2338 V_pfsyncstats.pfsyncs_oacts[PFSYNC_ACT_CLR]++; 2339 2340 strlcpy(r.clr.ifname, ifname, sizeof(r.clr.ifname)); 2341 r.clr.creatorid = creatorid; 2342 2343 pfsync_send_plus(&r, sizeof(r)); 2344 } 2345 2346 static enum pfsync_q_id 2347 pfsync_sstate_to_qid(u_int8_t sync_state) 2348 { 2349 struct pfsync_softc *sc = V_pfsyncif; 2350 2351 switch (sync_state) { 2352 case PFSYNC_S_INS: 2353 switch (sc->sc_version) { 2354 case PFSYNC_MSG_VERSION_1301: 2355 return PFSYNC_Q_INS_1301; 2356 case PFSYNC_MSG_VERSION_1400: 2357 return PFSYNC_Q_INS_1400; 2358 } 2359 break; 2360 case PFSYNC_S_IACK: 2361 return PFSYNC_Q_IACK; 2362 case PFSYNC_S_UPD: 2363 switch (sc->sc_version) { 2364 case PFSYNC_MSG_VERSION_1301: 2365 return PFSYNC_Q_UPD_1301; 2366 case PFSYNC_MSG_VERSION_1400: 2367 return PFSYNC_Q_UPD_1400; 2368 } 2369 break; 2370 case PFSYNC_S_UPD_C: 2371 return PFSYNC_Q_UPD_C; 2372 case PFSYNC_S_DEL_C: 2373 return PFSYNC_Q_DEL_C; 2374 default: 2375 panic("%s: Unsupported st->sync_state 0x%02x", 2376 __func__, sync_state); 2377 } 2378 2379 panic("%s: Unsupported pfsync_msg_version %d", 2380 __func__, sc->sc_version); 2381 } 2382 2383 static void 2384 pfsync_q_ins(struct pf_kstate *st, int sync_state, bool ref) 2385 { 2386 enum pfsync_q_id q = pfsync_sstate_to_qid(sync_state); 2387 struct pfsync_softc *sc = V_pfsyncif; 2388 size_t nlen = pfsync_qs[q].len; 2389 struct pfsync_bucket *b = pfsync_get_bucket(sc, st); 2390 2391 PFSYNC_BUCKET_LOCK_ASSERT(b); 2392 2393 KASSERT(st->sync_state == PFSYNC_S_NONE, 2394 ("%s: st->sync_state %u", __func__, st->sync_state)); 2395 KASSERT(b->b_len >= PFSYNC_MINPKT, ("pfsync pkt len is too low %zu", 2396 b->b_len)); 2397 2398 if (TAILQ_EMPTY(&b->b_qs[q])) 2399 nlen += sizeof(struct pfsync_subheader); 2400 2401 if (b->b_len + nlen > sc->sc_ifp->if_mtu) { 2402 pfsync_sendout(1, b->b_id); 2403 2404 nlen = sizeof(struct pfsync_subheader) + pfsync_qs[q].len; 2405 } 2406 2407 b->b_len += nlen; 2408 TAILQ_INSERT_TAIL(&b->b_qs[q], st, sync_list); 2409 st->sync_state = pfsync_qid_sstate[q]; 2410 if (ref) 2411 pf_ref_state(st); 2412 } 2413 2414 static void 2415 pfsync_q_del(struct pf_kstate *st, bool unref, struct pfsync_bucket *b) 2416 { 2417 enum pfsync_q_id q; 2418 2419 PFSYNC_BUCKET_LOCK_ASSERT(b); 2420 KASSERT(st->sync_state != PFSYNC_S_NONE, 2421 ("%s: st->sync_state != PFSYNC_S_NONE", __func__)); 2422 2423 q = pfsync_sstate_to_qid(st->sync_state); 2424 b->b_len -= pfsync_qs[q].len; 2425 TAILQ_REMOVE(&b->b_qs[q], st, sync_list); 2426 st->sync_state = PFSYNC_S_NONE; 2427 if (unref) 2428 pf_release_state(st); 2429 2430 if (TAILQ_EMPTY(&b->b_qs[q])) 2431 b->b_len -= sizeof(struct pfsync_subheader); 2432 } 2433 2434 static void 2435 pfsync_bulk_start(void) 2436 { 2437 struct pfsync_softc *sc = V_pfsyncif; 2438 2439 if (V_pf_status.debug >= PF_DEBUG_MISC) 2440 printf("pfsync: received bulk update request\n"); 2441 2442 PFSYNC_BLOCK(sc); 2443 2444 sc->sc_ureq_received = time_uptime; 2445 sc->sc_bulk_hashid = 0; 2446 sc->sc_bulk_stateid = 0; 2447 pfsync_bulk_status(PFSYNC_BUS_START); 2448 callout_reset(&sc->sc_bulk_tmo, 1, pfsync_bulk_update, sc); 2449 PFSYNC_BUNLOCK(sc); 2450 } 2451 2452 static void 2453 pfsync_bulk_update(void *arg) 2454 { 2455 struct pfsync_softc *sc = arg; 2456 struct pf_kstate *s; 2457 int i; 2458 2459 PFSYNC_BLOCK_ASSERT(sc); 2460 CURVNET_SET(sc->sc_ifp->if_vnet); 2461 2462 /* 2463 * Start with last state from previous invocation. 2464 * It may had gone, in this case start from the 2465 * hash slot. 2466 */ 2467 s = pf_find_state_byid(sc->sc_bulk_stateid, sc->sc_bulk_creatorid); 2468 2469 if (s != NULL) 2470 i = PF_IDHASH(s); 2471 else 2472 i = sc->sc_bulk_hashid; 2473 2474 for (; i <= pf_hashmask; i++) { 2475 struct pf_idhash *ih = &V_pf_idhash[i]; 2476 2477 if (s != NULL) 2478 PF_HASHROW_ASSERT(ih); 2479 else { 2480 PF_HASHROW_LOCK(ih); 2481 s = LIST_FIRST(&ih->states); 2482 } 2483 2484 for (; s; s = LIST_NEXT(s, entry)) { 2485 if (s->sync_state == PFSYNC_S_NONE && 2486 s->timeout < PFTM_MAX && 2487 s->pfsync_time <= sc->sc_ureq_received) { 2488 if (pfsync_update_state_req(s)) { 2489 /* We've filled a packet. */ 2490 sc->sc_bulk_hashid = i; 2491 sc->sc_bulk_stateid = s->id; 2492 sc->sc_bulk_creatorid = s->creatorid; 2493 PF_HASHROW_UNLOCK(ih); 2494 callout_reset(&sc->sc_bulk_tmo, 1, 2495 pfsync_bulk_update, sc); 2496 goto full; 2497 } 2498 } 2499 } 2500 PF_HASHROW_UNLOCK(ih); 2501 } 2502 2503 /* We're done. */ 2504 pfsync_bulk_status(PFSYNC_BUS_END); 2505 full: 2506 CURVNET_RESTORE(); 2507 } 2508 2509 static void 2510 pfsync_bulk_status(u_int8_t status) 2511 { 2512 struct { 2513 struct pfsync_subheader subh; 2514 struct pfsync_bus bus; 2515 } __packed r; 2516 2517 struct pfsync_softc *sc = V_pfsyncif; 2518 2519 bzero(&r, sizeof(r)); 2520 2521 r.subh.action = PFSYNC_ACT_BUS; 2522 r.subh.count = htons(1); 2523 V_pfsyncstats.pfsyncs_oacts[PFSYNC_ACT_BUS]++; 2524 2525 r.bus.creatorid = V_pf_status.hostid; 2526 r.bus.endtime = htonl(time_uptime - sc->sc_ureq_received); 2527 r.bus.status = status; 2528 2529 pfsync_send_plus(&r, sizeof(r)); 2530 } 2531 2532 static void 2533 pfsync_bulk_fail(void *arg) 2534 { 2535 struct pfsync_softc *sc = arg; 2536 struct pfsync_bucket *b = &sc->sc_buckets[0]; 2537 2538 CURVNET_SET(sc->sc_ifp->if_vnet); 2539 2540 PFSYNC_BLOCK_ASSERT(sc); 2541 2542 if (sc->sc_bulk_tries++ < PFSYNC_MAX_BULKTRIES) { 2543 /* Try again */ 2544 callout_reset(&sc->sc_bulkfail_tmo, 5 * hz, 2545 pfsync_bulk_fail, V_pfsyncif); 2546 PFSYNC_BUCKET_LOCK(b); 2547 pfsync_request_update(0, 0); 2548 PFSYNC_BUCKET_UNLOCK(b); 2549 } else { 2550 /* Pretend like the transfer was ok. */ 2551 sc->sc_ureq_sent = 0; 2552 sc->sc_bulk_tries = 0; 2553 PFSYNC_LOCK(sc); 2554 if (!(sc->sc_flags & PFSYNCF_OK) && carp_demote_adj_p) 2555 (*carp_demote_adj_p)(-V_pfsync_carp_adj, 2556 "pfsync bulk fail"); 2557 sc->sc_flags |= PFSYNCF_OK; 2558 PFSYNC_UNLOCK(sc); 2559 if (V_pf_status.debug >= PF_DEBUG_MISC) 2560 printf("pfsync: failed to receive bulk update\n"); 2561 } 2562 2563 CURVNET_RESTORE(); 2564 } 2565 2566 static void 2567 pfsync_send_plus(void *plus, size_t pluslen) 2568 { 2569 struct pfsync_softc *sc = V_pfsyncif; 2570 struct pfsync_bucket *b = &sc->sc_buckets[0]; 2571 uint8_t *newplus; 2572 2573 PFSYNC_BUCKET_LOCK(b); 2574 2575 if (b->b_len + pluslen > sc->sc_ifp->if_mtu) 2576 pfsync_sendout(1, b->b_id); 2577 2578 newplus = malloc(pluslen + b->b_pluslen, M_PFSYNC, M_NOWAIT); 2579 if (newplus == NULL) 2580 goto out; 2581 2582 if (b->b_plus != NULL) { 2583 memcpy(newplus, b->b_plus, b->b_pluslen); 2584 free(b->b_plus, M_PFSYNC); 2585 } else { 2586 MPASS(b->b_pluslen == 0); 2587 } 2588 memcpy(newplus + b->b_pluslen, plus, pluslen); 2589 2590 b->b_plus = newplus; 2591 b->b_pluslen += pluslen; 2592 b->b_len += pluslen; 2593 2594 pfsync_sendout(1, b->b_id); 2595 2596 out: 2597 PFSYNC_BUCKET_UNLOCK(b); 2598 } 2599 2600 static void 2601 pfsync_timeout(void *arg) 2602 { 2603 struct pfsync_bucket *b = arg; 2604 2605 CURVNET_SET(b->b_sc->sc_ifp->if_vnet); 2606 PFSYNC_BUCKET_LOCK(b); 2607 pfsync_push(b); 2608 PFSYNC_BUCKET_UNLOCK(b); 2609 CURVNET_RESTORE(); 2610 } 2611 2612 static void 2613 pfsync_push(struct pfsync_bucket *b) 2614 { 2615 2616 PFSYNC_BUCKET_LOCK_ASSERT(b); 2617 2618 b->b_flags |= PFSYNCF_BUCKET_PUSH; 2619 swi_sched(V_pfsync_swi_cookie, 0); 2620 } 2621 2622 static void 2623 pfsync_push_all(struct pfsync_softc *sc) 2624 { 2625 int c; 2626 struct pfsync_bucket *b; 2627 2628 for (c = 0; c < pfsync_buckets; c++) { 2629 b = &sc->sc_buckets[c]; 2630 2631 PFSYNC_BUCKET_LOCK(b); 2632 pfsync_push(b); 2633 PFSYNC_BUCKET_UNLOCK(b); 2634 } 2635 } 2636 2637 static void 2638 pfsync_tx(struct pfsync_softc *sc, struct mbuf *m) 2639 { 2640 struct ip *ip; 2641 int af, error = 0; 2642 2643 ip = mtod(m, struct ip *); 2644 MPASS(ip->ip_v == IPVERSION || ip->ip_v == (IPV6_VERSION >> 4)); 2645 2646 af = ip->ip_v == IPVERSION ? AF_INET : AF_INET6; 2647 2648 /* 2649 * We distinguish between a deferral packet and our 2650 * own pfsync packet based on M_SKIP_FIREWALL 2651 * flag. This is XXX. 2652 */ 2653 switch (af) { 2654 #ifdef INET 2655 case AF_INET: 2656 if (m->m_flags & M_SKIP_FIREWALL) { 2657 error = ip_output(m, NULL, NULL, 0, 2658 NULL, NULL); 2659 } else { 2660 error = ip_output(m, NULL, NULL, 2661 IP_RAWOUTPUT, &sc->sc_imo, NULL); 2662 } 2663 break; 2664 #endif 2665 #ifdef INET6 2666 case AF_INET6: 2667 if (m->m_flags & M_SKIP_FIREWALL) { 2668 error = ip6_output(m, NULL, NULL, 0, 2669 NULL, NULL, NULL); 2670 } else { 2671 error = ip6_output(m, NULL, NULL, 0, 2672 &sc->sc_im6o, NULL, NULL); 2673 } 2674 break; 2675 #endif 2676 } 2677 2678 if (error == 0) 2679 V_pfsyncstats.pfsyncs_opackets++; 2680 else 2681 V_pfsyncstats.pfsyncs_oerrors++; 2682 2683 } 2684 2685 static void 2686 pfsyncintr(void *arg) 2687 { 2688 struct epoch_tracker et; 2689 struct pfsync_softc *sc = arg; 2690 struct pfsync_bucket *b; 2691 struct mbuf *m, *n; 2692 int c; 2693 2694 NET_EPOCH_ENTER(et); 2695 CURVNET_SET(sc->sc_ifp->if_vnet); 2696 2697 for (c = 0; c < pfsync_buckets; c++) { 2698 b = &sc->sc_buckets[c]; 2699 2700 PFSYNC_BUCKET_LOCK(b); 2701 if ((b->b_flags & PFSYNCF_BUCKET_PUSH) && b->b_len > PFSYNC_MINPKT) { 2702 pfsync_sendout(0, b->b_id); 2703 b->b_flags &= ~PFSYNCF_BUCKET_PUSH; 2704 } 2705 _IF_DEQUEUE_ALL(&b->b_snd, m); 2706 PFSYNC_BUCKET_UNLOCK(b); 2707 2708 for (; m != NULL; m = n) { 2709 n = m->m_nextpkt; 2710 m->m_nextpkt = NULL; 2711 2712 pfsync_tx(sc, m); 2713 } 2714 } 2715 CURVNET_RESTORE(); 2716 NET_EPOCH_EXIT(et); 2717 } 2718 2719 static int 2720 pfsync_multicast_setup(struct pfsync_softc *sc, struct ifnet *ifp, 2721 struct in_mfilter* imf, struct in6_mfilter* im6f) 2722 { 2723 #ifdef INET 2724 struct ip_moptions *imo = &sc->sc_imo; 2725 #endif 2726 #ifdef INET6 2727 struct ip6_moptions *im6o = &sc->sc_im6o; 2728 struct sockaddr_in6 *syncpeer_sa6 = NULL; 2729 #endif 2730 2731 if (!(ifp->if_flags & IFF_MULTICAST)) 2732 return (EADDRNOTAVAIL); 2733 2734 switch (sc->sc_sync_peer.ss_family) { 2735 #ifdef INET 2736 case AF_INET: 2737 { 2738 int error; 2739 2740 ip_mfilter_init(&imo->imo_head); 2741 imo->imo_multicast_vif = -1; 2742 if ((error = in_joingroup(ifp, 2743 &((struct sockaddr_in *)&sc->sc_sync_peer)->sin_addr, NULL, 2744 &imf->imf_inm)) != 0) 2745 return (error); 2746 2747 ip_mfilter_insert(&imo->imo_head, imf); 2748 imo->imo_multicast_ifp = ifp; 2749 imo->imo_multicast_ttl = PFSYNC_DFLTTL; 2750 imo->imo_multicast_loop = 0; 2751 break; 2752 } 2753 #endif 2754 #ifdef INET6 2755 case AF_INET6: 2756 { 2757 int error; 2758 2759 syncpeer_sa6 = (struct sockaddr_in6 *)&sc->sc_sync_peer; 2760 if ((error = in6_setscope(&syncpeer_sa6->sin6_addr, ifp, NULL))) 2761 return (error); 2762 2763 ip6_mfilter_init(&im6o->im6o_head); 2764 if ((error = in6_joingroup(ifp, &syncpeer_sa6->sin6_addr, NULL, 2765 &(im6f->im6f_in6m), 0)) != 0) 2766 return (error); 2767 2768 ip6_mfilter_insert(&im6o->im6o_head, im6f); 2769 im6o->im6o_multicast_ifp = ifp; 2770 im6o->im6o_multicast_hlim = PFSYNC_DFLTTL; 2771 im6o->im6o_multicast_loop = 0; 2772 break; 2773 } 2774 #endif 2775 } 2776 2777 return (0); 2778 } 2779 2780 static void 2781 pfsync_multicast_cleanup(struct pfsync_softc *sc) 2782 { 2783 #ifdef INET 2784 struct ip_moptions *imo = &sc->sc_imo; 2785 struct in_mfilter *imf; 2786 2787 while ((imf = ip_mfilter_first(&imo->imo_head)) != NULL) { 2788 ip_mfilter_remove(&imo->imo_head, imf); 2789 in_leavegroup(imf->imf_inm, NULL); 2790 ip_mfilter_free(imf); 2791 } 2792 imo->imo_multicast_ifp = NULL; 2793 #endif 2794 2795 #ifdef INET6 2796 struct ip6_moptions *im6o = &sc->sc_im6o; 2797 struct in6_mfilter *im6f; 2798 2799 while ((im6f = ip6_mfilter_first(&im6o->im6o_head)) != NULL) { 2800 ip6_mfilter_remove(&im6o->im6o_head, im6f); 2801 in6_leavegroup(im6f->im6f_in6m, NULL); 2802 ip6_mfilter_free(im6f); 2803 } 2804 im6o->im6o_multicast_ifp = NULL; 2805 #endif 2806 } 2807 2808 void 2809 pfsync_detach_ifnet(struct ifnet *ifp) 2810 { 2811 struct pfsync_softc *sc = V_pfsyncif; 2812 2813 if (sc == NULL) 2814 return; 2815 2816 PFSYNC_LOCK(sc); 2817 2818 if (sc->sc_sync_if == ifp) { 2819 /* We don't need mutlicast cleanup here, because the interface 2820 * is going away. We do need to ensure we don't try to do 2821 * cleanup later. 2822 */ 2823 ip_mfilter_init(&sc->sc_imo.imo_head); 2824 sc->sc_imo.imo_multicast_ifp = NULL; 2825 sc->sc_im6o.im6o_multicast_ifp = NULL; 2826 sc->sc_sync_if = NULL; 2827 } 2828 2829 PFSYNC_UNLOCK(sc); 2830 } 2831 2832 static int 2833 pfsync_pfsyncreq_to_kstatus(struct pfsyncreq *pfsyncr, struct pfsync_kstatus *status) 2834 { 2835 struct sockaddr_storage sa; 2836 status->maxupdates = pfsyncr->pfsyncr_maxupdates; 2837 status->flags = pfsyncr->pfsyncr_defer; 2838 2839 strlcpy(status->syncdev, pfsyncr->pfsyncr_syncdev, IFNAMSIZ); 2840 2841 memset(&sa, 0, sizeof(sa)); 2842 if (pfsyncr->pfsyncr_syncpeer.s_addr != 0) { 2843 struct sockaddr_in *in = (struct sockaddr_in *)&sa; 2844 in->sin_family = AF_INET; 2845 in->sin_len = sizeof(*in); 2846 in->sin_addr.s_addr = pfsyncr->pfsyncr_syncpeer.s_addr; 2847 } 2848 status->syncpeer = sa; 2849 2850 return 0; 2851 } 2852 2853 static int 2854 pfsync_kstatus_to_softc(struct pfsync_kstatus *status, struct pfsync_softc *sc) 2855 { 2856 struct ifnet *sifp; 2857 struct in_mfilter *imf = NULL; 2858 struct in6_mfilter *im6f = NULL; 2859 int error; 2860 int c; 2861 2862 if ((status->maxupdates < 0) || (status->maxupdates > 255)) 2863 return (EINVAL); 2864 2865 if (status->syncdev[0] == '\0') 2866 sifp = NULL; 2867 else if ((sifp = ifunit_ref(status->syncdev)) == NULL) 2868 return (EINVAL); 2869 2870 switch (status->syncpeer.ss_family) { 2871 #ifdef INET 2872 case AF_UNSPEC: 2873 case AF_INET: { 2874 struct sockaddr_in *status_sin; 2875 status_sin = (struct sockaddr_in *)&(status->syncpeer); 2876 if (sifp != NULL) { 2877 if (status_sin->sin_addr.s_addr == 0 || 2878 status_sin->sin_addr.s_addr == 2879 htonl(INADDR_PFSYNC_GROUP)) { 2880 status_sin->sin_family = AF_INET; 2881 status_sin->sin_len = sizeof(*status_sin); 2882 status_sin->sin_addr.s_addr = 2883 htonl(INADDR_PFSYNC_GROUP); 2884 } 2885 2886 if (IN_MULTICAST(ntohl(status_sin->sin_addr.s_addr))) { 2887 imf = ip_mfilter_alloc(M_WAITOK, 0, 0); 2888 } 2889 } 2890 break; 2891 } 2892 #endif 2893 #ifdef INET6 2894 case AF_INET6: { 2895 struct sockaddr_in6 *status_sin6; 2896 status_sin6 = (struct sockaddr_in6*)&(status->syncpeer); 2897 if (sifp != NULL) { 2898 if (IN6_IS_ADDR_UNSPECIFIED(&status_sin6->sin6_addr) || 2899 IN6_ARE_ADDR_EQUAL(&status_sin6->sin6_addr, 2900 &in6addr_linklocal_pfsync_group)) { 2901 status_sin6->sin6_family = AF_INET6; 2902 status_sin6->sin6_len = sizeof(*status_sin6); 2903 status_sin6->sin6_addr = 2904 in6addr_linklocal_pfsync_group; 2905 } 2906 2907 if (IN6_IS_ADDR_MULTICAST(&status_sin6->sin6_addr)) { 2908 im6f = ip6_mfilter_alloc(M_WAITOK, 0, 0); 2909 } 2910 } 2911 break; 2912 } 2913 #endif 2914 } 2915 2916 PFSYNC_LOCK(sc); 2917 2918 switch (status->version) { 2919 case PFSYNC_MSG_VERSION_UNSPECIFIED: 2920 sc->sc_version = PFSYNC_MSG_VERSION_DEFAULT; 2921 break; 2922 case PFSYNC_MSG_VERSION_1301: 2923 case PFSYNC_MSG_VERSION_1400: 2924 sc->sc_version = status->version; 2925 break; 2926 default: 2927 PFSYNC_UNLOCK(sc); 2928 return (EINVAL); 2929 } 2930 2931 switch (status->syncpeer.ss_family) { 2932 case AF_INET: { 2933 struct sockaddr_in *status_sin = (struct sockaddr_in *)&(status->syncpeer); 2934 struct sockaddr_in *sc_sin = (struct sockaddr_in *)&sc->sc_sync_peer; 2935 sc_sin->sin_family = AF_INET; 2936 sc_sin->sin_len = sizeof(*sc_sin); 2937 if (status_sin->sin_addr.s_addr == 0) { 2938 sc_sin->sin_addr.s_addr = htonl(INADDR_PFSYNC_GROUP); 2939 } else { 2940 sc_sin->sin_addr.s_addr = status_sin->sin_addr.s_addr; 2941 } 2942 break; 2943 } 2944 case AF_INET6: { 2945 struct sockaddr_in6 *status_sin = (struct sockaddr_in6 *)&(status->syncpeer); 2946 struct sockaddr_in6 *sc_sin = (struct sockaddr_in6 *)&sc->sc_sync_peer; 2947 sc_sin->sin6_family = AF_INET6; 2948 sc_sin->sin6_len = sizeof(*sc_sin); 2949 if(IN6_IS_ADDR_UNSPECIFIED(&status_sin->sin6_addr)) { 2950 sc_sin->sin6_addr = in6addr_linklocal_pfsync_group; 2951 } else { 2952 sc_sin->sin6_addr = status_sin->sin6_addr; 2953 } 2954 break; 2955 } 2956 } 2957 2958 sc->sc_maxupdates = status->maxupdates; 2959 if (status->flags & PFSYNCF_DEFER) { 2960 sc->sc_flags |= PFSYNCF_DEFER; 2961 V_pfsync_defer_ptr = pfsync_defer; 2962 } else { 2963 sc->sc_flags &= ~PFSYNCF_DEFER; 2964 V_pfsync_defer_ptr = NULL; 2965 } 2966 2967 if (sifp == NULL) { 2968 if (sc->sc_sync_if) 2969 if_rele(sc->sc_sync_if); 2970 sc->sc_sync_if = NULL; 2971 pfsync_multicast_cleanup(sc); 2972 PFSYNC_UNLOCK(sc); 2973 return (0); 2974 } 2975 2976 for (c = 0; c < pfsync_buckets; c++) { 2977 PFSYNC_BUCKET_LOCK(&sc->sc_buckets[c]); 2978 if (sc->sc_buckets[c].b_len > PFSYNC_MINPKT && 2979 (sifp->if_mtu < sc->sc_ifp->if_mtu || 2980 (sc->sc_sync_if != NULL && 2981 sifp->if_mtu < sc->sc_sync_if->if_mtu) || 2982 sifp->if_mtu < MCLBYTES - sizeof(struct ip))) 2983 pfsync_sendout(1, c); 2984 PFSYNC_BUCKET_UNLOCK(&sc->sc_buckets[c]); 2985 } 2986 2987 pfsync_multicast_cleanup(sc); 2988 2989 if (((sc->sc_sync_peer.ss_family == AF_INET) && 2990 IN_MULTICAST(ntohl(((struct sockaddr_in *) 2991 &sc->sc_sync_peer)->sin_addr.s_addr))) || 2992 ((sc->sc_sync_peer.ss_family == AF_INET6) && 2993 IN6_IS_ADDR_MULTICAST(&((struct sockaddr_in6*) 2994 &sc->sc_sync_peer)->sin6_addr))) { 2995 error = pfsync_multicast_setup(sc, sifp, imf, im6f); 2996 if (error) { 2997 if_rele(sifp); 2998 PFSYNC_UNLOCK(sc); 2999 #ifdef INET 3000 if (imf != NULL) 3001 ip_mfilter_free(imf); 3002 #endif 3003 #ifdef INET6 3004 if (im6f != NULL) 3005 ip6_mfilter_free(im6f); 3006 #endif 3007 return (error); 3008 } 3009 } 3010 if (sc->sc_sync_if) 3011 if_rele(sc->sc_sync_if); 3012 sc->sc_sync_if = sifp; 3013 3014 switch (sc->sc_sync_peer.ss_family) { 3015 #ifdef INET 3016 case AF_INET: { 3017 struct ip *ip; 3018 ip = &sc->sc_template.ipv4; 3019 bzero(ip, sizeof(*ip)); 3020 ip->ip_v = IPVERSION; 3021 ip->ip_hl = sizeof(sc->sc_template.ipv4) >> 2; 3022 ip->ip_tos = IPTOS_LOWDELAY; 3023 /* len and id are set later. */ 3024 ip->ip_off = htons(IP_DF); 3025 ip->ip_ttl = PFSYNC_DFLTTL; 3026 ip->ip_p = IPPROTO_PFSYNC; 3027 ip->ip_src.s_addr = INADDR_ANY; 3028 ip->ip_dst = ((struct sockaddr_in *)&sc->sc_sync_peer)->sin_addr; 3029 break; 3030 } 3031 #endif 3032 #ifdef INET6 3033 case AF_INET6: { 3034 struct ip6_hdr *ip6; 3035 ip6 = &sc->sc_template.ipv6; 3036 bzero(ip6, sizeof(*ip6)); 3037 ip6->ip6_vfc = IPV6_VERSION; 3038 ip6->ip6_hlim = PFSYNC_DFLTTL; 3039 ip6->ip6_nxt = IPPROTO_PFSYNC; 3040 ip6->ip6_dst = ((struct sockaddr_in6 *)&sc->sc_sync_peer)->sin6_addr; 3041 3042 struct epoch_tracker et; 3043 NET_EPOCH_ENTER(et); 3044 in6_selectsrc_addr(if_getfib(sc->sc_sync_if), &ip6->ip6_dst, 0, 3045 sc->sc_sync_if, &ip6->ip6_src, NULL); 3046 NET_EPOCH_EXIT(et); 3047 break; 3048 } 3049 #endif 3050 } 3051 3052 /* Request a full state table update. */ 3053 if ((sc->sc_flags & PFSYNCF_OK) && carp_demote_adj_p) 3054 (*carp_demote_adj_p)(V_pfsync_carp_adj, 3055 "pfsync bulk start"); 3056 sc->sc_flags &= ~PFSYNCF_OK; 3057 if (V_pf_status.debug >= PF_DEBUG_MISC) 3058 printf("pfsync: requesting bulk update\n"); 3059 PFSYNC_UNLOCK(sc); 3060 PFSYNC_BUCKET_LOCK(&sc->sc_buckets[0]); 3061 pfsync_request_update(0, 0); 3062 PFSYNC_BUCKET_UNLOCK(&sc->sc_buckets[0]); 3063 PFSYNC_BLOCK(sc); 3064 sc->sc_ureq_sent = time_uptime; 3065 callout_reset(&sc->sc_bulkfail_tmo, 5 * hz, pfsync_bulk_fail, sc); 3066 PFSYNC_BUNLOCK(sc); 3067 return (0); 3068 } 3069 3070 static void 3071 pfsync_pointers_init(void) 3072 { 3073 3074 PF_RULES_WLOCK(); 3075 V_pfsync_state_import_ptr = pfsync_state_import; 3076 V_pfsync_insert_state_ptr = pfsync_insert_state; 3077 V_pfsync_update_state_ptr = pfsync_update_state; 3078 V_pfsync_delete_state_ptr = pfsync_delete_state; 3079 V_pfsync_clear_states_ptr = pfsync_clear_states; 3080 V_pfsync_defer_ptr = pfsync_defer; 3081 PF_RULES_WUNLOCK(); 3082 } 3083 3084 static void 3085 pfsync_pointers_uninit(void) 3086 { 3087 3088 PF_RULES_WLOCK(); 3089 V_pfsync_state_import_ptr = NULL; 3090 V_pfsync_insert_state_ptr = NULL; 3091 V_pfsync_update_state_ptr = NULL; 3092 V_pfsync_delete_state_ptr = NULL; 3093 V_pfsync_clear_states_ptr = NULL; 3094 V_pfsync_defer_ptr = NULL; 3095 PF_RULES_WUNLOCK(); 3096 } 3097 3098 static void 3099 vnet_pfsync_init(const void *unused __unused) 3100 { 3101 int error; 3102 3103 V_pfsync_cloner = if_clone_simple(pfsyncname, 3104 pfsync_clone_create, pfsync_clone_destroy, 1); 3105 error = swi_add(&V_pfsync_swi_ie, pfsyncname, pfsyncintr, V_pfsyncif, 3106 SWI_NET, INTR_MPSAFE, &V_pfsync_swi_cookie); 3107 if (error) { 3108 if_clone_detach(V_pfsync_cloner); 3109 log(LOG_INFO, "swi_add() failed in %s\n", __func__); 3110 } 3111 3112 pfsync_pointers_init(); 3113 } 3114 VNET_SYSINIT(vnet_pfsync_init, SI_SUB_PROTO_FIREWALL, SI_ORDER_ANY, 3115 vnet_pfsync_init, NULL); 3116 3117 static void 3118 vnet_pfsync_uninit(const void *unused __unused) 3119 { 3120 int ret __diagused; 3121 3122 pfsync_pointers_uninit(); 3123 3124 if_clone_detach(V_pfsync_cloner); 3125 ret = swi_remove(V_pfsync_swi_cookie); 3126 MPASS(ret == 0); 3127 ret = intr_event_destroy(V_pfsync_swi_ie); 3128 MPASS(ret == 0); 3129 } 3130 3131 VNET_SYSUNINIT(vnet_pfsync_uninit, SI_SUB_PROTO_FIREWALL, SI_ORDER_FOURTH, 3132 vnet_pfsync_uninit, NULL); 3133 3134 static int 3135 pfsync_init(void) 3136 { 3137 int error; 3138 3139 pfsync_detach_ifnet_ptr = pfsync_detach_ifnet; 3140 3141 #ifdef INET 3142 error = ipproto_register(IPPROTO_PFSYNC, pfsync_input, NULL); 3143 if (error) 3144 return (error); 3145 #endif 3146 #ifdef INET6 3147 error = ip6proto_register(IPPROTO_PFSYNC, pfsync6_input, NULL); 3148 if (error) { 3149 ipproto_unregister(IPPROTO_PFSYNC); 3150 return (error); 3151 } 3152 #endif 3153 3154 return (0); 3155 } 3156 3157 static void 3158 pfsync_uninit(void) 3159 { 3160 pfsync_detach_ifnet_ptr = NULL; 3161 3162 #ifdef INET 3163 ipproto_unregister(IPPROTO_PFSYNC); 3164 #endif 3165 #ifdef INET6 3166 ip6proto_unregister(IPPROTO_PFSYNC); 3167 #endif 3168 } 3169 3170 static int 3171 pfsync_modevent(module_t mod, int type, void *data) 3172 { 3173 int error = 0; 3174 3175 switch (type) { 3176 case MOD_LOAD: 3177 error = pfsync_init(); 3178 break; 3179 case MOD_UNLOAD: 3180 pfsync_uninit(); 3181 break; 3182 default: 3183 error = EINVAL; 3184 break; 3185 } 3186 3187 return (error); 3188 } 3189 3190 static moduledata_t pfsync_mod = { 3191 pfsyncname, 3192 pfsync_modevent, 3193 0 3194 }; 3195 3196 #define PFSYNC_MODVER 1 3197 3198 /* Stay on FIREWALL as we depend on pf being initialized and on inetdomain. */ 3199 DECLARE_MODULE(pfsync, pfsync_mod, SI_SUB_PROTO_FIREWALL, SI_ORDER_ANY); 3200 MODULE_VERSION(pfsync, PFSYNC_MODVER); 3201 MODULE_DEPEND(pfsync, pf, PF_MODVER, PF_MODVER, PF_MODVER); 3202