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_all(struct pfsync_softc *); 349 static void pfsync_drop(struct pfsync_softc *, int); 350 static void pfsync_sendout(int, int); 351 static void pfsync_send_plus(void *, size_t); 352 353 static void pfsync_bulk_start(void); 354 static void pfsync_bulk_status(u_int8_t); 355 static void pfsync_bulk_update(void *); 356 static void pfsync_bulk_fail(void *); 357 358 static void pfsync_detach_ifnet(struct ifnet *); 359 360 static int pfsync_pfsyncreq_to_kstatus(struct pfsyncreq *, 361 struct pfsync_kstatus *); 362 static int pfsync_kstatus_to_softc(struct pfsync_kstatus *, 363 struct pfsync_softc *); 364 365 #ifdef IPSEC 366 static void pfsync_update_net_tdb(struct pfsync_tdb *); 367 #endif 368 static struct pfsync_bucket *pfsync_get_bucket(struct pfsync_softc *, 369 struct pf_kstate *); 370 371 #define PFSYNC_MAX_BULKTRIES 12 372 373 VNET_DEFINE(struct if_clone *, pfsync_cloner); 374 #define V_pfsync_cloner VNET(pfsync_cloner) 375 376 const struct in6_addr in6addr_linklocal_pfsync_group = 377 {{{ 0xff, 0x12, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 378 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xf0 }}}; 379 static int 380 pfsync_clone_create(struct if_clone *ifc, int unit, caddr_t param) 381 { 382 struct pfsync_softc *sc; 383 struct ifnet *ifp; 384 struct pfsync_bucket *b; 385 int c; 386 enum pfsync_q_id q; 387 388 if (unit != 0) 389 return (EINVAL); 390 391 if (! pfsync_buckets) 392 pfsync_buckets = mp_ncpus * 2; 393 394 sc = malloc(sizeof(struct pfsync_softc), M_PFSYNC, M_WAITOK | M_ZERO); 395 sc->sc_flags |= PFSYNCF_OK; 396 sc->sc_maxupdates = 128; 397 sc->sc_version = PFSYNC_MSG_VERSION_DEFAULT; 398 399 ifp = sc->sc_ifp = if_alloc(IFT_PFSYNC); 400 if_initname(ifp, pfsyncname, unit); 401 ifp->if_softc = sc; 402 ifp->if_ioctl = pfsyncioctl; 403 ifp->if_output = pfsyncoutput; 404 ifp->if_type = IFT_PFSYNC; 405 ifp->if_hdrlen = sizeof(struct pfsync_header); 406 ifp->if_mtu = ETHERMTU; 407 mtx_init(&sc->sc_mtx, pfsyncname, NULL, MTX_DEF); 408 mtx_init(&sc->sc_bulk_mtx, "pfsync bulk", NULL, MTX_DEF); 409 callout_init_mtx(&sc->sc_bulk_tmo, &sc->sc_bulk_mtx, 0); 410 callout_init_mtx(&sc->sc_bulkfail_tmo, &sc->sc_bulk_mtx, 0); 411 412 if_attach(ifp); 413 414 bpfattach(ifp, DLT_PFSYNC, PFSYNC_HDRLEN); 415 416 sc->sc_buckets = mallocarray(pfsync_buckets, sizeof(*sc->sc_buckets), 417 M_PFSYNC, M_ZERO | M_WAITOK); 418 for (c = 0; c < pfsync_buckets; c++) { 419 b = &sc->sc_buckets[c]; 420 mtx_init(&b->b_mtx, "pfsync bucket", NULL, MTX_DEF); 421 422 b->b_id = c; 423 b->b_sc = sc; 424 b->b_len = PFSYNC_MINPKT; 425 426 for (q = 0; q < PFSYNC_Q_COUNT; q++) 427 TAILQ_INIT(&b->b_qs[q]); 428 429 TAILQ_INIT(&b->b_upd_req_list); 430 TAILQ_INIT(&b->b_deferrals); 431 432 callout_init(&b->b_tmo, 1); 433 434 b->b_snd.ifq_maxlen = ifqmaxlen; 435 } 436 437 V_pfsyncif = sc; 438 439 return (0); 440 } 441 442 static void 443 pfsync_clone_destroy(struct ifnet *ifp) 444 { 445 struct pfsync_softc *sc = ifp->if_softc; 446 struct pfsync_bucket *b; 447 int c, ret; 448 449 for (c = 0; c < pfsync_buckets; c++) { 450 b = &sc->sc_buckets[c]; 451 /* 452 * At this stage, everything should have already been 453 * cleared by pfsync_uninit(), and we have only to 454 * drain callouts. 455 */ 456 PFSYNC_BUCKET_LOCK(b); 457 while (b->b_deferred > 0) { 458 struct pfsync_deferral *pd = 459 TAILQ_FIRST(&b->b_deferrals); 460 461 ret = callout_stop(&pd->pd_tmo); 462 PFSYNC_BUCKET_UNLOCK(b); 463 if (ret > 0) { 464 pfsync_undefer(pd, 1); 465 } else { 466 callout_drain(&pd->pd_tmo); 467 } 468 PFSYNC_BUCKET_LOCK(b); 469 } 470 MPASS(b->b_deferred == 0); 471 MPASS(TAILQ_EMPTY(&b->b_deferrals)); 472 PFSYNC_BUCKET_UNLOCK(b); 473 474 free(b->b_plus, M_PFSYNC); 475 b->b_plus = NULL; 476 b->b_pluslen = 0; 477 478 callout_drain(&b->b_tmo); 479 } 480 481 callout_drain(&sc->sc_bulkfail_tmo); 482 callout_drain(&sc->sc_bulk_tmo); 483 484 if (!(sc->sc_flags & PFSYNCF_OK) && carp_demote_adj_p) 485 (*carp_demote_adj_p)(-V_pfsync_carp_adj, "pfsync destroy"); 486 bpfdetach(ifp); 487 if_detach(ifp); 488 489 pfsync_drop_all(sc); 490 491 if_free(ifp); 492 pfsync_multicast_cleanup(sc); 493 mtx_destroy(&sc->sc_mtx); 494 mtx_destroy(&sc->sc_bulk_mtx); 495 496 free(sc->sc_buckets, M_PFSYNC); 497 free(sc, M_PFSYNC); 498 499 V_pfsyncif = NULL; 500 } 501 502 static int 503 pfsync_alloc_scrub_memory(struct pfsync_state_peer *s, 504 struct pf_state_peer *d) 505 { 506 if (s->scrub.scrub_flag && d->scrub == NULL) { 507 d->scrub = uma_zalloc(V_pf_state_scrub_z, M_NOWAIT | M_ZERO); 508 if (d->scrub == NULL) 509 return (ENOMEM); 510 } 511 512 return (0); 513 } 514 515 static int 516 pfsync_state_import(union pfsync_state_union *sp, int flags, int msg_version) 517 { 518 struct pfsync_softc *sc = V_pfsyncif; 519 #ifndef __NO_STRICT_ALIGNMENT 520 struct pfsync_state_key key[2]; 521 #endif 522 struct pfsync_state_key *kw, *ks; 523 struct pf_kstate *st = NULL; 524 struct pf_state_key *skw = NULL, *sks = NULL; 525 struct pf_krule *r = NULL; 526 struct pfi_kkif *kif; 527 int error; 528 529 PF_RULES_RASSERT(); 530 531 if (sp->pfs_1301.creatorid == 0) { 532 if (V_pf_status.debug >= PF_DEBUG_MISC) 533 printf("%s: invalid creator id: %08x\n", __func__, 534 ntohl(sp->pfs_1301.creatorid)); 535 return (EINVAL); 536 } 537 538 if ((kif = pfi_kkif_find(sp->pfs_1301.ifname)) == NULL) { 539 if (V_pf_status.debug >= PF_DEBUG_MISC) 540 printf("%s: unknown interface: %s\n", __func__, 541 sp->pfs_1301.ifname); 542 if (flags & PFSYNC_SI_IOCTL) 543 return (EINVAL); 544 return (0); /* skip this state */ 545 } 546 547 /* 548 * If the ruleset checksums match or the state is coming from the ioctl, 549 * it's safe to associate the state with the rule of that number. 550 */ 551 if (sp->pfs_1301.rule != htonl(-1) && sp->pfs_1301.anchor == htonl(-1) && 552 (flags & (PFSYNC_SI_IOCTL | PFSYNC_SI_CKSUM)) && ntohl(sp->pfs_1301.rule) < 553 pf_main_ruleset.rules[PF_RULESET_FILTER].active.rcount) 554 r = pf_main_ruleset.rules[ 555 PF_RULESET_FILTER].active.ptr_array[ntohl(sp->pfs_1301.rule)]; 556 else 557 r = &V_pf_default_rule; 558 559 if ((r->max_states && 560 counter_u64_fetch(r->states_cur) >= r->max_states)) 561 goto cleanup; 562 563 /* 564 * XXXGL: consider M_WAITOK in ioctl path after. 565 */ 566 st = pf_alloc_state(M_NOWAIT); 567 if (__predict_false(st == NULL)) 568 goto cleanup; 569 570 if ((skw = uma_zalloc(V_pf_state_key_z, M_NOWAIT)) == NULL) 571 goto cleanup; 572 573 #ifndef __NO_STRICT_ALIGNMENT 574 bcopy(&sp->pfs_1301.key, key, sizeof(struct pfsync_state_key) * 2); 575 kw = &key[PF_SK_WIRE]; 576 ks = &key[PF_SK_STACK]; 577 #else 578 kw = &sp->pfs_1301.key[PF_SK_WIRE]; 579 ks = &sp->pfs_1301.key[PF_SK_STACK]; 580 #endif 581 582 if (PF_ANEQ(&kw->addr[0], &ks->addr[0], sp->pfs_1301.af) || 583 PF_ANEQ(&kw->addr[1], &ks->addr[1], sp->pfs_1301.af) || 584 kw->port[0] != ks->port[0] || 585 kw->port[1] != ks->port[1]) { 586 sks = uma_zalloc(V_pf_state_key_z, M_NOWAIT); 587 if (sks == NULL) 588 goto cleanup; 589 } else 590 sks = skw; 591 592 /* allocate memory for scrub info */ 593 if (pfsync_alloc_scrub_memory(&sp->pfs_1301.src, &st->src) || 594 pfsync_alloc_scrub_memory(&sp->pfs_1301.dst, &st->dst)) 595 goto cleanup; 596 597 /* Copy to state key(s). */ 598 skw->addr[0] = kw->addr[0]; 599 skw->addr[1] = kw->addr[1]; 600 skw->port[0] = kw->port[0]; 601 skw->port[1] = kw->port[1]; 602 skw->proto = sp->pfs_1301.proto; 603 skw->af = sp->pfs_1301.af; 604 if (sks != skw) { 605 sks->addr[0] = ks->addr[0]; 606 sks->addr[1] = ks->addr[1]; 607 sks->port[0] = ks->port[0]; 608 sks->port[1] = ks->port[1]; 609 sks->proto = sp->pfs_1301.proto; 610 sks->af = sp->pfs_1301.af; 611 } 612 613 /* copy to state */ 614 bcopy(&sp->pfs_1301.rt_addr, &st->rt_addr, sizeof(st->rt_addr)); 615 st->creation = (time_uptime - ntohl(sp->pfs_1301.creation)) * 1000; 616 st->expire = pf_get_uptime(); 617 if (sp->pfs_1301.expire) { 618 uint32_t timeout; 619 620 timeout = r->timeout[sp->pfs_1301.timeout]; 621 if (!timeout) 622 timeout = V_pf_default_rule.timeout[sp->pfs_1301.timeout]; 623 624 /* sp->expire may have been adaptively scaled by export. */ 625 st->expire -= (timeout - ntohl(sp->pfs_1301.expire)) * 1000; 626 } 627 628 st->direction = sp->pfs_1301.direction; 629 st->act.log = sp->pfs_1301.log; 630 st->timeout = sp->pfs_1301.timeout; 631 632 switch (msg_version) { 633 case PFSYNC_MSG_VERSION_1301: 634 st->state_flags = sp->pfs_1301.state_flags; 635 /* 636 * In FreeBSD 13 pfsync lacks many attributes. Copy them 637 * from the rule if possible. If rule can't be matched 638 * clear any set options as we can't recover their 639 * parameters. 640 */ 641 if (r == &V_pf_default_rule) { 642 st->state_flags &= ~PFSTATE_SETMASK; 643 } else { 644 /* 645 * Similar to pf_rule_to_actions(). This code 646 * won't set the actions properly if they come 647 * from multiple "match" rules as only rule 648 * creating the state is send over pfsync. 649 */ 650 st->act.qid = r->qid; 651 st->act.pqid = r->pqid; 652 st->act.rtableid = r->rtableid; 653 if (r->scrub_flags & PFSTATE_SETTOS) 654 st->act.set_tos = r->set_tos; 655 st->act.min_ttl = r->min_ttl; 656 st->act.max_mss = r->max_mss; 657 st->state_flags |= (r->scrub_flags & 658 (PFSTATE_NODF|PFSTATE_RANDOMID| 659 PFSTATE_SETTOS|PFSTATE_SCRUB_TCP| 660 PFSTATE_SETPRIO)); 661 if (r->dnpipe || r->dnrpipe) { 662 if (r->free_flags & PFRULE_DN_IS_PIPE) 663 st->state_flags |= PFSTATE_DN_IS_PIPE; 664 else 665 st->state_flags &= ~PFSTATE_DN_IS_PIPE; 666 } 667 st->act.dnpipe = r->dnpipe; 668 st->act.dnrpipe = r->dnrpipe; 669 } 670 break; 671 case PFSYNC_MSG_VERSION_1400: 672 st->state_flags = ntohs(sp->pfs_1400.state_flags); 673 st->act.qid = ntohs(sp->pfs_1400.qid); 674 st->act.pqid = ntohs(sp->pfs_1400.pqid); 675 st->act.dnpipe = ntohs(sp->pfs_1400.dnpipe); 676 st->act.dnrpipe = ntohs(sp->pfs_1400.dnrpipe); 677 st->act.rtableid = ntohl(sp->pfs_1400.rtableid); 678 st->act.min_ttl = sp->pfs_1400.min_ttl; 679 st->act.set_tos = sp->pfs_1400.set_tos; 680 st->act.max_mss = ntohs(sp->pfs_1400.max_mss); 681 st->act.set_prio[0] = sp->pfs_1400.set_prio[0]; 682 st->act.set_prio[1] = sp->pfs_1400.set_prio[1]; 683 st->rt = sp->pfs_1400.rt; 684 if (st->rt && (st->rt_kif = pfi_kkif_find(sp->pfs_1400.rt_ifname)) == NULL) { 685 if (V_pf_status.debug >= PF_DEBUG_MISC) 686 printf("%s: unknown route interface: %s\n", 687 __func__, sp->pfs_1400.rt_ifname); 688 if (flags & PFSYNC_SI_IOCTL) 689 error = EINVAL; 690 else 691 error = 0; 692 goto cleanup_keys; 693 } 694 break; 695 default: 696 panic("%s: Unsupported pfsync_msg_version %d", 697 __func__, msg_version); 698 } 699 700 st->id = sp->pfs_1301.id; 701 st->creatorid = sp->pfs_1301.creatorid; 702 pf_state_peer_ntoh(&sp->pfs_1301.src, &st->src); 703 pf_state_peer_ntoh(&sp->pfs_1301.dst, &st->dst); 704 705 st->rule = r; 706 st->nat_rule = NULL; 707 st->anchor = NULL; 708 709 st->pfsync_time = time_uptime; 710 st->sync_state = PFSYNC_S_NONE; 711 712 if (!(flags & PFSYNC_SI_IOCTL)) 713 st->state_flags |= PFSTATE_NOSYNC; 714 715 if ((error = pf_state_insert(kif, kif, skw, sks, st)) != 0) 716 goto cleanup_state; 717 718 /* XXX when we have nat_rule/anchors, use STATE_INC_COUNTERS */ 719 counter_u64_add(r->states_cur, 1); 720 counter_u64_add(r->states_tot, 1); 721 722 if (!(flags & PFSYNC_SI_IOCTL)) { 723 st->state_flags &= ~PFSTATE_NOSYNC; 724 if (st->state_flags & PFSTATE_ACK) { 725 struct pfsync_bucket *b = pfsync_get_bucket(sc, st); 726 PFSYNC_BUCKET_LOCK(b); 727 pfsync_q_ins(st, PFSYNC_S_IACK, true); 728 PFSYNC_BUCKET_UNLOCK(b); 729 730 pfsync_push_all(sc); 731 } 732 } 733 st->state_flags &= ~PFSTATE_ACK; 734 PF_STATE_UNLOCK(st); 735 736 return (0); 737 738 cleanup: 739 error = ENOMEM; 740 cleanup_keys: 741 if (skw == sks) 742 sks = NULL; 743 uma_zfree(V_pf_state_key_z, skw); 744 uma_zfree(V_pf_state_key_z, sks); 745 746 cleanup_state: /* pf_state_insert() frees the state keys. */ 747 if (st) { 748 st->timeout = PFTM_UNLINKED; /* appease an assert */ 749 pf_free_state(st); 750 } 751 return (error); 752 } 753 754 #ifdef INET 755 static int 756 pfsync_input(struct mbuf **mp, int *offp __unused, int proto __unused) 757 { 758 struct pfsync_softc *sc = V_pfsyncif; 759 struct mbuf *m = *mp; 760 struct ip *ip = mtod(m, struct ip *); 761 struct pfsync_header *ph; 762 struct pfsync_subheader subh; 763 764 int offset, len, flags = 0; 765 int rv; 766 uint16_t count; 767 768 PF_RULES_RLOCK_TRACKER; 769 770 *mp = NULL; 771 V_pfsyncstats.pfsyncs_ipackets++; 772 773 /* Verify that we have a sync interface configured. */ 774 if (!sc || !sc->sc_sync_if || !V_pf_status.running || 775 (sc->sc_ifp->if_drv_flags & IFF_DRV_RUNNING) == 0) 776 goto done; 777 778 /* verify that the packet came in on the right interface */ 779 if (sc->sc_sync_if != m->m_pkthdr.rcvif) { 780 V_pfsyncstats.pfsyncs_badif++; 781 goto done; 782 } 783 784 if_inc_counter(sc->sc_ifp, IFCOUNTER_IPACKETS, 1); 785 if_inc_counter(sc->sc_ifp, IFCOUNTER_IBYTES, m->m_pkthdr.len); 786 /* verify that the IP TTL is 255. */ 787 if (ip->ip_ttl != PFSYNC_DFLTTL) { 788 V_pfsyncstats.pfsyncs_badttl++; 789 goto done; 790 } 791 792 offset = ip->ip_hl << 2; 793 if (m->m_pkthdr.len < offset + sizeof(*ph)) { 794 V_pfsyncstats.pfsyncs_hdrops++; 795 goto done; 796 } 797 798 if (offset + sizeof(*ph) > m->m_len) { 799 if (m_pullup(m, offset + sizeof(*ph)) == NULL) { 800 V_pfsyncstats.pfsyncs_hdrops++; 801 return (IPPROTO_DONE); 802 } 803 ip = mtod(m, struct ip *); 804 } 805 ph = (struct pfsync_header *)((char *)ip + offset); 806 807 /* verify the version */ 808 if (ph->version != PFSYNC_VERSION) { 809 V_pfsyncstats.pfsyncs_badver++; 810 goto done; 811 } 812 813 len = ntohs(ph->len) + offset; 814 if (m->m_pkthdr.len < len) { 815 V_pfsyncstats.pfsyncs_badlen++; 816 goto done; 817 } 818 819 /* 820 * Trusting pf_chksum during packet processing, as well as seeking 821 * in interface name tree, require holding PF_RULES_RLOCK(). 822 */ 823 PF_RULES_RLOCK(); 824 if (!bcmp(&ph->pfcksum, &V_pf_status.pf_chksum, PF_MD5_DIGEST_LENGTH)) 825 flags = PFSYNC_SI_CKSUM; 826 827 offset += sizeof(*ph); 828 while (offset <= len - sizeof(subh)) { 829 m_copydata(m, offset, sizeof(subh), (caddr_t)&subh); 830 offset += sizeof(subh); 831 832 if (subh.action >= PFSYNC_ACT_MAX) { 833 V_pfsyncstats.pfsyncs_badact++; 834 PF_RULES_RUNLOCK(); 835 goto done; 836 } 837 838 count = ntohs(subh.count); 839 V_pfsyncstats.pfsyncs_iacts[subh.action] += count; 840 rv = (*pfsync_acts[subh.action])(m, offset, count, flags, subh.action); 841 if (rv == -1) { 842 PF_RULES_RUNLOCK(); 843 return (IPPROTO_DONE); 844 } 845 846 offset += rv; 847 } 848 PF_RULES_RUNLOCK(); 849 850 done: 851 m_freem(m); 852 return (IPPROTO_DONE); 853 } 854 #endif 855 856 #ifdef INET6 857 static int 858 pfsync6_input(struct mbuf **mp, int *offp __unused, int proto __unused) 859 { 860 struct pfsync_softc *sc = V_pfsyncif; 861 struct mbuf *m = *mp; 862 struct ip6_hdr *ip6 = mtod(m, struct ip6_hdr *); 863 struct pfsync_header *ph; 864 struct pfsync_subheader subh; 865 866 int offset, len, flags = 0; 867 int rv; 868 uint16_t count; 869 870 PF_RULES_RLOCK_TRACKER; 871 872 *mp = NULL; 873 V_pfsyncstats.pfsyncs_ipackets++; 874 875 /* Verify that we have a sync interface configured. */ 876 if (!sc || !sc->sc_sync_if || !V_pf_status.running || 877 (sc->sc_ifp->if_drv_flags & IFF_DRV_RUNNING) == 0) 878 goto done; 879 880 /* verify that the packet came in on the right interface */ 881 if (sc->sc_sync_if != m->m_pkthdr.rcvif) { 882 V_pfsyncstats.pfsyncs_badif++; 883 goto done; 884 } 885 886 if_inc_counter(sc->sc_ifp, IFCOUNTER_IPACKETS, 1); 887 if_inc_counter(sc->sc_ifp, IFCOUNTER_IBYTES, m->m_pkthdr.len); 888 /* verify that the IP TTL is 255. */ 889 if (ip6->ip6_hlim != PFSYNC_DFLTTL) { 890 V_pfsyncstats.pfsyncs_badttl++; 891 goto done; 892 } 893 894 895 offset = sizeof(*ip6); 896 if (m->m_pkthdr.len < offset + sizeof(*ph)) { 897 V_pfsyncstats.pfsyncs_hdrops++; 898 goto done; 899 } 900 901 if (offset + sizeof(*ph) > m->m_len) { 902 if (m_pullup(m, offset + sizeof(*ph)) == NULL) { 903 V_pfsyncstats.pfsyncs_hdrops++; 904 return (IPPROTO_DONE); 905 } 906 ip6 = mtod(m, struct ip6_hdr *); 907 } 908 ph = (struct pfsync_header *)((char *)ip6 + offset); 909 910 /* verify the version */ 911 if (ph->version != PFSYNC_VERSION) { 912 V_pfsyncstats.pfsyncs_badver++; 913 goto done; 914 } 915 916 len = ntohs(ph->len) + offset; 917 if (m->m_pkthdr.len < len) { 918 V_pfsyncstats.pfsyncs_badlen++; 919 goto done; 920 } 921 922 /* 923 * Trusting pf_chksum during packet processing, as well as seeking 924 * in interface name tree, require holding PF_RULES_RLOCK(). 925 */ 926 PF_RULES_RLOCK(); 927 if (!bcmp(&ph->pfcksum, &V_pf_status.pf_chksum, PF_MD5_DIGEST_LENGTH)) 928 flags = PFSYNC_SI_CKSUM; 929 930 offset += sizeof(*ph); 931 while (offset <= len - sizeof(subh)) { 932 m_copydata(m, offset, sizeof(subh), (caddr_t)&subh); 933 offset += sizeof(subh); 934 935 if (subh.action >= PFSYNC_ACT_MAX) { 936 V_pfsyncstats.pfsyncs_badact++; 937 PF_RULES_RUNLOCK(); 938 goto done; 939 } 940 941 count = ntohs(subh.count); 942 V_pfsyncstats.pfsyncs_iacts[subh.action] += count; 943 rv = (*pfsync_acts[subh.action])(m, offset, count, flags, subh.action); 944 if (rv == -1) { 945 PF_RULES_RUNLOCK(); 946 return (IPPROTO_DONE); 947 } 948 949 offset += rv; 950 } 951 PF_RULES_RUNLOCK(); 952 953 done: 954 m_freem(m); 955 return (IPPROTO_DONE); 956 } 957 #endif 958 959 static int 960 pfsync_in_clr(struct mbuf *m, int offset, int count, int flags, int action) 961 { 962 struct pfsync_clr *clr; 963 struct mbuf *mp; 964 int len = sizeof(*clr) * count; 965 int i, offp; 966 u_int32_t creatorid; 967 968 mp = m_pulldown(m, offset, len, &offp); 969 if (mp == NULL) { 970 V_pfsyncstats.pfsyncs_badlen++; 971 return (-1); 972 } 973 clr = (struct pfsync_clr *)(mp->m_data + offp); 974 975 for (i = 0; i < count; i++) { 976 creatorid = clr[i].creatorid; 977 978 if (clr[i].ifname[0] != '\0' && 979 pfi_kkif_find(clr[i].ifname) == NULL) 980 continue; 981 982 for (int i = 0; i <= V_pf_hashmask; i++) { 983 struct pf_idhash *ih = &V_pf_idhash[i]; 984 struct pf_kstate *s; 985 relock: 986 PF_HASHROW_LOCK(ih); 987 LIST_FOREACH(s, &ih->states, entry) { 988 if (s->creatorid == creatorid) { 989 s->state_flags |= PFSTATE_NOSYNC; 990 pf_unlink_state(s); 991 goto relock; 992 } 993 } 994 PF_HASHROW_UNLOCK(ih); 995 } 996 } 997 998 return (len); 999 } 1000 1001 static int 1002 pfsync_in_ins(struct mbuf *m, int offset, int count, int flags, int action) 1003 { 1004 struct mbuf *mp; 1005 union pfsync_state_union *sa, *sp; 1006 int i, offp, total_len, msg_version, msg_len; 1007 1008 switch (action) { 1009 case PFSYNC_ACT_INS_1301: 1010 msg_len = sizeof(struct pfsync_state_1301); 1011 total_len = msg_len * count; 1012 msg_version = PFSYNC_MSG_VERSION_1301; 1013 break; 1014 case PFSYNC_ACT_INS_1400: 1015 msg_len = sizeof(struct pfsync_state_1400); 1016 total_len = msg_len * count; 1017 msg_version = PFSYNC_MSG_VERSION_1400; 1018 break; 1019 default: 1020 V_pfsyncstats.pfsyncs_badact++; 1021 return (-1); 1022 } 1023 1024 mp = m_pulldown(m, offset, total_len, &offp); 1025 if (mp == NULL) { 1026 V_pfsyncstats.pfsyncs_badlen++; 1027 return (-1); 1028 } 1029 sa = (union pfsync_state_union *)(mp->m_data + offp); 1030 1031 for (i = 0; i < count; i++) { 1032 sp = (union pfsync_state_union *)((char *)sa + msg_len * i); 1033 1034 /* Check for invalid values. */ 1035 if (sp->pfs_1301.timeout >= PFTM_MAX || 1036 sp->pfs_1301.src.state > PF_TCPS_PROXY_DST || 1037 sp->pfs_1301.dst.state > PF_TCPS_PROXY_DST || 1038 sp->pfs_1301.direction > PF_OUT || 1039 (sp->pfs_1301.af != AF_INET && 1040 sp->pfs_1301.af != AF_INET6)) { 1041 if (V_pf_status.debug >= PF_DEBUG_MISC) 1042 printf("%s: invalid value\n", __func__); 1043 V_pfsyncstats.pfsyncs_badval++; 1044 continue; 1045 } 1046 1047 if (pfsync_state_import(sp, flags, msg_version) == ENOMEM) 1048 /* Drop out, but process the rest of the actions. */ 1049 break; 1050 } 1051 1052 return (total_len); 1053 } 1054 1055 static int 1056 pfsync_in_iack(struct mbuf *m, int offset, int count, int flags, int action) 1057 { 1058 struct pfsync_ins_ack *ia, *iaa; 1059 struct pf_kstate *st; 1060 1061 struct mbuf *mp; 1062 int len = count * sizeof(*ia); 1063 int offp, i; 1064 1065 mp = m_pulldown(m, offset, len, &offp); 1066 if (mp == NULL) { 1067 V_pfsyncstats.pfsyncs_badlen++; 1068 return (-1); 1069 } 1070 iaa = (struct pfsync_ins_ack *)(mp->m_data + offp); 1071 1072 for (i = 0; i < count; i++) { 1073 ia = &iaa[i]; 1074 1075 st = pf_find_state_byid(ia->id, ia->creatorid); 1076 if (st == NULL) 1077 continue; 1078 1079 if (st->state_flags & PFSTATE_ACK) { 1080 pfsync_undefer_state(st, 0); 1081 } 1082 PF_STATE_UNLOCK(st); 1083 } 1084 /* 1085 * XXX this is not yet implemented, but we know the size of the 1086 * message so we can skip it. 1087 */ 1088 1089 return (count * sizeof(struct pfsync_ins_ack)); 1090 } 1091 1092 static int 1093 pfsync_upd_tcp(struct pf_kstate *st, struct pfsync_state_peer *src, 1094 struct pfsync_state_peer *dst) 1095 { 1096 int sync = 0; 1097 1098 PF_STATE_LOCK_ASSERT(st); 1099 1100 /* 1101 * The state should never go backwards except 1102 * for syn-proxy states. Neither should the 1103 * sequence window slide backwards. 1104 */ 1105 if ((st->src.state > src->state && 1106 (st->src.state < PF_TCPS_PROXY_SRC || 1107 src->state >= PF_TCPS_PROXY_SRC)) || 1108 1109 (st->src.state == src->state && 1110 SEQ_GT(st->src.seqlo, ntohl(src->seqlo)))) 1111 sync++; 1112 else 1113 pf_state_peer_ntoh(src, &st->src); 1114 1115 if ((st->dst.state > dst->state) || 1116 1117 (st->dst.state >= TCPS_SYN_SENT && 1118 SEQ_GT(st->dst.seqlo, ntohl(dst->seqlo)))) 1119 sync++; 1120 else 1121 pf_state_peer_ntoh(dst, &st->dst); 1122 1123 return (sync); 1124 } 1125 1126 static int 1127 pfsync_in_upd(struct mbuf *m, int offset, int count, int flags, int action) 1128 { 1129 struct pfsync_softc *sc = V_pfsyncif; 1130 union pfsync_state_union *sa, *sp; 1131 struct pf_kstate *st; 1132 struct mbuf *mp; 1133 int sync, offp, i, total_len, msg_len, msg_version; 1134 1135 switch (action) { 1136 case PFSYNC_ACT_UPD_1301: 1137 msg_len = sizeof(struct pfsync_state_1301); 1138 total_len = msg_len * count; 1139 msg_version = PFSYNC_MSG_VERSION_1301; 1140 break; 1141 case PFSYNC_ACT_UPD_1400: 1142 msg_len = sizeof(struct pfsync_state_1400); 1143 total_len = msg_len * count; 1144 msg_version = PFSYNC_MSG_VERSION_1400; 1145 break; 1146 default: 1147 V_pfsyncstats.pfsyncs_badact++; 1148 return (-1); 1149 } 1150 1151 mp = m_pulldown(m, offset, total_len, &offp); 1152 if (mp == NULL) { 1153 V_pfsyncstats.pfsyncs_badlen++; 1154 return (-1); 1155 } 1156 sa = (union pfsync_state_union *)(mp->m_data + offp); 1157 1158 for (i = 0; i < count; i++) { 1159 sp = (union pfsync_state_union *)((char *)sa + msg_len * i); 1160 1161 /* check for invalid values */ 1162 if (sp->pfs_1301.timeout >= PFTM_MAX || 1163 sp->pfs_1301.src.state > PF_TCPS_PROXY_DST || 1164 sp->pfs_1301.dst.state > PF_TCPS_PROXY_DST) { 1165 if (V_pf_status.debug >= PF_DEBUG_MISC) { 1166 printf("pfsync_input: PFSYNC_ACT_UPD: " 1167 "invalid value\n"); 1168 } 1169 V_pfsyncstats.pfsyncs_badval++; 1170 continue; 1171 } 1172 1173 st = pf_find_state_byid(sp->pfs_1301.id, sp->pfs_1301.creatorid); 1174 if (st == NULL) { 1175 /* insert the update */ 1176 if (pfsync_state_import(sp, flags, msg_version)) 1177 V_pfsyncstats.pfsyncs_badstate++; 1178 continue; 1179 } 1180 1181 if (st->state_flags & PFSTATE_ACK) { 1182 pfsync_undefer_state(st, 1); 1183 } 1184 1185 if (st->key[PF_SK_WIRE]->proto == IPPROTO_TCP) 1186 sync = pfsync_upd_tcp(st, &sp->pfs_1301.src, &sp->pfs_1301.dst); 1187 else { 1188 sync = 0; 1189 1190 /* 1191 * Non-TCP protocol state machine always go 1192 * forwards 1193 */ 1194 if (st->src.state > sp->pfs_1301.src.state) 1195 sync++; 1196 else 1197 pf_state_peer_ntoh(&sp->pfs_1301.src, &st->src); 1198 if (st->dst.state > sp->pfs_1301.dst.state) 1199 sync++; 1200 else 1201 pf_state_peer_ntoh(&sp->pfs_1301.dst, &st->dst); 1202 } 1203 if (sync < 2) { 1204 pfsync_alloc_scrub_memory(&sp->pfs_1301.dst, &st->dst); 1205 pf_state_peer_ntoh(&sp->pfs_1301.dst, &st->dst); 1206 st->expire = pf_get_uptime(); 1207 st->timeout = sp->pfs_1301.timeout; 1208 } 1209 st->pfsync_time = time_uptime; 1210 1211 if (sync) { 1212 V_pfsyncstats.pfsyncs_stale++; 1213 1214 pfsync_update_state(st); 1215 PF_STATE_UNLOCK(st); 1216 pfsync_push_all(sc); 1217 continue; 1218 } 1219 PF_STATE_UNLOCK(st); 1220 } 1221 1222 return (total_len); 1223 } 1224 1225 static int 1226 pfsync_in_upd_c(struct mbuf *m, int offset, int count, int flags, int action) 1227 { 1228 struct pfsync_softc *sc = V_pfsyncif; 1229 struct pfsync_upd_c *ua, *up; 1230 struct pf_kstate *st; 1231 int len = count * sizeof(*up); 1232 int sync; 1233 struct mbuf *mp; 1234 int offp, i; 1235 1236 mp = m_pulldown(m, offset, len, &offp); 1237 if (mp == NULL) { 1238 V_pfsyncstats.pfsyncs_badlen++; 1239 return (-1); 1240 } 1241 ua = (struct pfsync_upd_c *)(mp->m_data + offp); 1242 1243 for (i = 0; i < count; i++) { 1244 up = &ua[i]; 1245 1246 /* check for invalid values */ 1247 if (up->timeout >= PFTM_MAX || 1248 up->src.state > PF_TCPS_PROXY_DST || 1249 up->dst.state > PF_TCPS_PROXY_DST) { 1250 if (V_pf_status.debug >= PF_DEBUG_MISC) { 1251 printf("pfsync_input: " 1252 "PFSYNC_ACT_UPD_C: " 1253 "invalid value\n"); 1254 } 1255 V_pfsyncstats.pfsyncs_badval++; 1256 continue; 1257 } 1258 1259 st = pf_find_state_byid(up->id, up->creatorid); 1260 if (st == NULL) { 1261 /* We don't have this state. Ask for it. */ 1262 PFSYNC_BUCKET_LOCK(&sc->sc_buckets[0]); 1263 pfsync_request_update(up->creatorid, up->id); 1264 PFSYNC_BUCKET_UNLOCK(&sc->sc_buckets[0]); 1265 continue; 1266 } 1267 1268 if (st->state_flags & PFSTATE_ACK) { 1269 pfsync_undefer_state(st, 1); 1270 } 1271 1272 if (st->key[PF_SK_WIRE]->proto == IPPROTO_TCP) 1273 sync = pfsync_upd_tcp(st, &up->src, &up->dst); 1274 else { 1275 sync = 0; 1276 1277 /* 1278 * Non-TCP protocol state machine always go 1279 * forwards 1280 */ 1281 if (st->src.state > up->src.state) 1282 sync++; 1283 else 1284 pf_state_peer_ntoh(&up->src, &st->src); 1285 if (st->dst.state > up->dst.state) 1286 sync++; 1287 else 1288 pf_state_peer_ntoh(&up->dst, &st->dst); 1289 } 1290 if (sync < 2) { 1291 pfsync_alloc_scrub_memory(&up->dst, &st->dst); 1292 pf_state_peer_ntoh(&up->dst, &st->dst); 1293 st->expire = pf_get_uptime(); 1294 st->timeout = up->timeout; 1295 } 1296 st->pfsync_time = time_uptime; 1297 1298 if (sync) { 1299 V_pfsyncstats.pfsyncs_stale++; 1300 1301 pfsync_update_state(st); 1302 PF_STATE_UNLOCK(st); 1303 pfsync_push_all(sc); 1304 continue; 1305 } 1306 PF_STATE_UNLOCK(st); 1307 } 1308 1309 return (len); 1310 } 1311 1312 static int 1313 pfsync_in_ureq(struct mbuf *m, int offset, int count, int flags, int action) 1314 { 1315 struct pfsync_upd_req *ur, *ura; 1316 struct mbuf *mp; 1317 int len = count * sizeof(*ur); 1318 int i, offp; 1319 1320 struct pf_kstate *st; 1321 1322 mp = m_pulldown(m, offset, len, &offp); 1323 if (mp == NULL) { 1324 V_pfsyncstats.pfsyncs_badlen++; 1325 return (-1); 1326 } 1327 ura = (struct pfsync_upd_req *)(mp->m_data + offp); 1328 1329 for (i = 0; i < count; i++) { 1330 ur = &ura[i]; 1331 1332 if (ur->id == 0 && ur->creatorid == 0) 1333 pfsync_bulk_start(); 1334 else { 1335 st = pf_find_state_byid(ur->id, ur->creatorid); 1336 if (st == NULL) { 1337 V_pfsyncstats.pfsyncs_badstate++; 1338 continue; 1339 } 1340 if (st->state_flags & PFSTATE_NOSYNC) { 1341 PF_STATE_UNLOCK(st); 1342 continue; 1343 } 1344 1345 pfsync_update_state_req(st); 1346 PF_STATE_UNLOCK(st); 1347 } 1348 } 1349 1350 return (len); 1351 } 1352 1353 static int 1354 pfsync_in_del_c(struct mbuf *m, int offset, int count, int flags, int action) 1355 { 1356 struct mbuf *mp; 1357 struct pfsync_del_c *sa, *sp; 1358 struct pf_kstate *st; 1359 int len = count * sizeof(*sp); 1360 int offp, i; 1361 1362 mp = m_pulldown(m, offset, len, &offp); 1363 if (mp == NULL) { 1364 V_pfsyncstats.pfsyncs_badlen++; 1365 return (-1); 1366 } 1367 sa = (struct pfsync_del_c *)(mp->m_data + offp); 1368 1369 for (i = 0; i < count; i++) { 1370 sp = &sa[i]; 1371 1372 st = pf_find_state_byid(sp->id, sp->creatorid); 1373 if (st == NULL) { 1374 V_pfsyncstats.pfsyncs_badstate++; 1375 continue; 1376 } 1377 1378 st->state_flags |= PFSTATE_NOSYNC; 1379 pf_unlink_state(st); 1380 } 1381 1382 return (len); 1383 } 1384 1385 static int 1386 pfsync_in_bus(struct mbuf *m, int offset, int count, int flags, int action) 1387 { 1388 struct pfsync_softc *sc = V_pfsyncif; 1389 struct pfsync_bus *bus; 1390 struct mbuf *mp; 1391 int len = count * sizeof(*bus); 1392 int offp; 1393 1394 PFSYNC_BLOCK(sc); 1395 1396 /* If we're not waiting for a bulk update, who cares. */ 1397 if (sc->sc_ureq_sent == 0) { 1398 PFSYNC_BUNLOCK(sc); 1399 return (len); 1400 } 1401 1402 mp = m_pulldown(m, offset, len, &offp); 1403 if (mp == NULL) { 1404 PFSYNC_BUNLOCK(sc); 1405 V_pfsyncstats.pfsyncs_badlen++; 1406 return (-1); 1407 } 1408 bus = (struct pfsync_bus *)(mp->m_data + offp); 1409 1410 switch (bus->status) { 1411 case PFSYNC_BUS_START: 1412 callout_reset(&sc->sc_bulkfail_tmo, 4 * hz + 1413 V_pf_limits[PF_LIMIT_STATES].limit / 1414 ((sc->sc_ifp->if_mtu - PFSYNC_MINPKT) / 1415 sizeof(union pfsync_state_union)), 1416 pfsync_bulk_fail, sc); 1417 if (V_pf_status.debug >= PF_DEBUG_MISC) 1418 printf("pfsync: received bulk update start\n"); 1419 break; 1420 1421 case PFSYNC_BUS_END: 1422 if (time_uptime - ntohl(bus->endtime) >= 1423 sc->sc_ureq_sent) { 1424 /* that's it, we're happy */ 1425 sc->sc_ureq_sent = 0; 1426 sc->sc_bulk_tries = 0; 1427 callout_stop(&sc->sc_bulkfail_tmo); 1428 if (!(sc->sc_flags & PFSYNCF_OK) && carp_demote_adj_p) 1429 (*carp_demote_adj_p)(-V_pfsync_carp_adj, 1430 "pfsync bulk done"); 1431 sc->sc_flags |= PFSYNCF_OK; 1432 if (V_pf_status.debug >= PF_DEBUG_MISC) 1433 printf("pfsync: received valid " 1434 "bulk update end\n"); 1435 } else { 1436 if (V_pf_status.debug >= PF_DEBUG_MISC) 1437 printf("pfsync: received invalid " 1438 "bulk update end: bad timestamp\n"); 1439 } 1440 break; 1441 } 1442 PFSYNC_BUNLOCK(sc); 1443 1444 return (len); 1445 } 1446 1447 static int 1448 pfsync_in_tdb(struct mbuf *m, int offset, int count, int flags, int action) 1449 { 1450 int len = count * sizeof(struct pfsync_tdb); 1451 1452 #if defined(IPSEC) 1453 struct pfsync_tdb *tp; 1454 struct mbuf *mp; 1455 int offp; 1456 int i; 1457 int s; 1458 1459 mp = m_pulldown(m, offset, len, &offp); 1460 if (mp == NULL) { 1461 V_pfsyncstats.pfsyncs_badlen++; 1462 return (-1); 1463 } 1464 tp = (struct pfsync_tdb *)(mp->m_data + offp); 1465 1466 for (i = 0; i < count; i++) 1467 pfsync_update_net_tdb(&tp[i]); 1468 #endif 1469 1470 return (len); 1471 } 1472 1473 #if defined(IPSEC) 1474 /* Update an in-kernel tdb. Silently fail if no tdb is found. */ 1475 static void 1476 pfsync_update_net_tdb(struct pfsync_tdb *pt) 1477 { 1478 struct tdb *tdb; 1479 int s; 1480 1481 /* check for invalid values */ 1482 if (ntohl(pt->spi) <= SPI_RESERVED_MAX || 1483 (pt->dst.sa.sa_family != AF_INET && 1484 pt->dst.sa.sa_family != AF_INET6)) 1485 goto bad; 1486 1487 tdb = gettdb(pt->spi, &pt->dst, pt->sproto); 1488 if (tdb) { 1489 pt->rpl = ntohl(pt->rpl); 1490 pt->cur_bytes = (unsigned long long)be64toh(pt->cur_bytes); 1491 1492 /* Neither replay nor byte counter should ever decrease. */ 1493 if (pt->rpl < tdb->tdb_rpl || 1494 pt->cur_bytes < tdb->tdb_cur_bytes) { 1495 goto bad; 1496 } 1497 1498 tdb->tdb_rpl = pt->rpl; 1499 tdb->tdb_cur_bytes = pt->cur_bytes; 1500 } 1501 return; 1502 1503 bad: 1504 if (V_pf_status.debug >= PF_DEBUG_MISC) 1505 printf("pfsync_insert: PFSYNC_ACT_TDB_UPD: " 1506 "invalid value\n"); 1507 V_pfsyncstats.pfsyncs_badstate++; 1508 return; 1509 } 1510 #endif 1511 1512 static int 1513 pfsync_in_eof(struct mbuf *m, int offset, int count, int flags, int action) 1514 { 1515 /* check if we are at the right place in the packet */ 1516 if (offset != m->m_pkthdr.len) 1517 V_pfsyncstats.pfsyncs_badlen++; 1518 1519 /* we're done. free and let the caller return */ 1520 m_freem(m); 1521 return (-1); 1522 } 1523 1524 static int 1525 pfsync_in_error(struct mbuf *m, int offset, int count, int flags, int action) 1526 { 1527 V_pfsyncstats.pfsyncs_badact++; 1528 1529 m_freem(m); 1530 return (-1); 1531 } 1532 1533 static int 1534 pfsyncoutput(struct ifnet *ifp, struct mbuf *m, const struct sockaddr *dst, 1535 struct route *rt) 1536 { 1537 m_freem(m); 1538 return (0); 1539 } 1540 1541 /* ARGSUSED */ 1542 static int 1543 pfsyncioctl(struct ifnet *ifp, u_long cmd, caddr_t data) 1544 { 1545 struct pfsync_softc *sc = ifp->if_softc; 1546 struct ifreq *ifr = (struct ifreq *)data; 1547 struct pfsyncreq pfsyncr; 1548 size_t nvbuflen; 1549 int error; 1550 int c; 1551 1552 switch (cmd) { 1553 case SIOCSIFFLAGS: 1554 PFSYNC_LOCK(sc); 1555 if (ifp->if_flags & IFF_UP) { 1556 ifp->if_drv_flags |= IFF_DRV_RUNNING; 1557 PFSYNC_UNLOCK(sc); 1558 pfsync_pointers_init(); 1559 } else { 1560 ifp->if_drv_flags &= ~IFF_DRV_RUNNING; 1561 PFSYNC_UNLOCK(sc); 1562 pfsync_pointers_uninit(); 1563 } 1564 break; 1565 case SIOCSIFMTU: 1566 if (!sc->sc_sync_if || 1567 ifr->ifr_mtu <= PFSYNC_MINPKT || 1568 ifr->ifr_mtu > sc->sc_sync_if->if_mtu) 1569 return (EINVAL); 1570 if (ifr->ifr_mtu < ifp->if_mtu) { 1571 for (c = 0; c < pfsync_buckets; c++) { 1572 PFSYNC_BUCKET_LOCK(&sc->sc_buckets[c]); 1573 if (sc->sc_buckets[c].b_len > PFSYNC_MINPKT) 1574 pfsync_sendout(1, c); 1575 PFSYNC_BUCKET_UNLOCK(&sc->sc_buckets[c]); 1576 } 1577 } 1578 ifp->if_mtu = ifr->ifr_mtu; 1579 break; 1580 case SIOCGETPFSYNC: 1581 bzero(&pfsyncr, sizeof(pfsyncr)); 1582 PFSYNC_LOCK(sc); 1583 if (sc->sc_sync_if) { 1584 strlcpy(pfsyncr.pfsyncr_syncdev, 1585 sc->sc_sync_if->if_xname, IFNAMSIZ); 1586 } 1587 pfsyncr.pfsyncr_syncpeer = ((struct sockaddr_in *)&sc->sc_sync_peer)->sin_addr; 1588 pfsyncr.pfsyncr_maxupdates = sc->sc_maxupdates; 1589 pfsyncr.pfsyncr_defer = sc->sc_flags; 1590 PFSYNC_UNLOCK(sc); 1591 return (copyout(&pfsyncr, ifr_data_get_ptr(ifr), 1592 sizeof(pfsyncr))); 1593 1594 case SIOCGETPFSYNCNV: 1595 { 1596 nvlist_t *nvl_syncpeer; 1597 nvlist_t *nvl = nvlist_create(0); 1598 1599 if (nvl == NULL) 1600 return (ENOMEM); 1601 1602 if (sc->sc_sync_if) 1603 nvlist_add_string(nvl, "syncdev", sc->sc_sync_if->if_xname); 1604 nvlist_add_number(nvl, "maxupdates", sc->sc_maxupdates); 1605 nvlist_add_number(nvl, "flags", sc->sc_flags); 1606 nvlist_add_number(nvl, "version", sc->sc_version); 1607 if ((nvl_syncpeer = pfsync_sockaddr_to_syncpeer_nvlist(&sc->sc_sync_peer)) != NULL) 1608 nvlist_add_nvlist(nvl, "syncpeer", nvl_syncpeer); 1609 1610 void *packed = NULL; 1611 packed = nvlist_pack(nvl, &nvbuflen); 1612 if (packed == NULL) { 1613 free(packed, M_NVLIST); 1614 nvlist_destroy(nvl); 1615 return (ENOMEM); 1616 } 1617 1618 if (nvbuflen > ifr->ifr_cap_nv.buf_length) { 1619 ifr->ifr_cap_nv.length = nvbuflen; 1620 ifr->ifr_cap_nv.buffer = NULL; 1621 free(packed, M_NVLIST); 1622 nvlist_destroy(nvl); 1623 return (EFBIG); 1624 } 1625 1626 ifr->ifr_cap_nv.length = nvbuflen; 1627 error = copyout(packed, ifr->ifr_cap_nv.buffer, nvbuflen); 1628 1629 nvlist_destroy(nvl); 1630 nvlist_destroy(nvl_syncpeer); 1631 free(packed, M_NVLIST); 1632 break; 1633 } 1634 1635 case SIOCSETPFSYNC: 1636 { 1637 struct pfsync_kstatus status; 1638 1639 if ((error = priv_check(curthread, PRIV_NETINET_PF)) != 0) 1640 return (error); 1641 if ((error = copyin(ifr_data_get_ptr(ifr), &pfsyncr, 1642 sizeof(pfsyncr)))) 1643 return (error); 1644 1645 memset((char *)&status, 0, sizeof(struct pfsync_kstatus)); 1646 pfsync_pfsyncreq_to_kstatus(&pfsyncr, &status); 1647 1648 error = pfsync_kstatus_to_softc(&status, sc); 1649 return (error); 1650 } 1651 case SIOCSETPFSYNCNV: 1652 { 1653 struct pfsync_kstatus status; 1654 void *data; 1655 nvlist_t *nvl; 1656 1657 if ((error = priv_check(curthread, PRIV_NETINET_PF)) != 0) 1658 return (error); 1659 if (ifr->ifr_cap_nv.length > IFR_CAP_NV_MAXBUFSIZE) 1660 return (EINVAL); 1661 1662 data = malloc(ifr->ifr_cap_nv.length, M_TEMP, M_WAITOK); 1663 1664 if ((error = copyin(ifr->ifr_cap_nv.buffer, data, 1665 ifr->ifr_cap_nv.length)) != 0) { 1666 free(data, M_TEMP); 1667 return (error); 1668 } 1669 1670 if ((nvl = nvlist_unpack(data, ifr->ifr_cap_nv.length, 0)) == NULL) { 1671 free(data, M_TEMP); 1672 return (EINVAL); 1673 } 1674 1675 memset((char *)&status, 0, sizeof(struct pfsync_kstatus)); 1676 pfsync_nvstatus_to_kstatus(nvl, &status); 1677 1678 nvlist_destroy(nvl); 1679 free(data, M_TEMP); 1680 1681 error = pfsync_kstatus_to_softc(&status, sc); 1682 return (error); 1683 } 1684 default: 1685 return (ENOTTY); 1686 } 1687 1688 return (0); 1689 } 1690 1691 static void 1692 pfsync_out_state_1301(struct pf_kstate *st, void *buf) 1693 { 1694 union pfsync_state_union *sp = buf; 1695 1696 pfsync_state_export(sp, st, PFSYNC_MSG_VERSION_1301); 1697 } 1698 1699 static void 1700 pfsync_out_state_1400(struct pf_kstate *st, void *buf) 1701 { 1702 union pfsync_state_union *sp = buf; 1703 1704 pfsync_state_export(sp, st, PFSYNC_MSG_VERSION_1400); 1705 } 1706 1707 static void 1708 pfsync_out_iack(struct pf_kstate *st, void *buf) 1709 { 1710 struct pfsync_ins_ack *iack = buf; 1711 1712 iack->id = st->id; 1713 iack->creatorid = st->creatorid; 1714 } 1715 1716 static void 1717 pfsync_out_upd_c(struct pf_kstate *st, void *buf) 1718 { 1719 struct pfsync_upd_c *up = buf; 1720 1721 bzero(up, sizeof(*up)); 1722 up->id = st->id; 1723 pf_state_peer_hton(&st->src, &up->src); 1724 pf_state_peer_hton(&st->dst, &up->dst); 1725 up->creatorid = st->creatorid; 1726 up->timeout = st->timeout; 1727 } 1728 1729 static void 1730 pfsync_out_del_c(struct pf_kstate *st, void *buf) 1731 { 1732 struct pfsync_del_c *dp = buf; 1733 1734 dp->id = st->id; 1735 dp->creatorid = st->creatorid; 1736 st->state_flags |= PFSTATE_NOSYNC; 1737 } 1738 1739 static void 1740 pfsync_drop_all(struct pfsync_softc *sc) 1741 { 1742 struct pfsync_bucket *b; 1743 int c; 1744 1745 for (c = 0; c < pfsync_buckets; c++) { 1746 b = &sc->sc_buckets[c]; 1747 1748 PFSYNC_BUCKET_LOCK(b); 1749 pfsync_drop(sc, c); 1750 PFSYNC_BUCKET_UNLOCK(b); 1751 } 1752 } 1753 1754 static void 1755 pfsync_drop(struct pfsync_softc *sc, int c) 1756 { 1757 struct pf_kstate *st, *next; 1758 struct pfsync_upd_req_item *ur; 1759 struct pfsync_bucket *b; 1760 enum pfsync_q_id q; 1761 1762 b = &sc->sc_buckets[c]; 1763 PFSYNC_BUCKET_LOCK_ASSERT(b); 1764 1765 for (q = 0; q < PFSYNC_Q_COUNT; q++) { 1766 if (TAILQ_EMPTY(&b->b_qs[q])) 1767 continue; 1768 1769 TAILQ_FOREACH_SAFE(st, &b->b_qs[q], sync_list, next) { 1770 KASSERT(st->sync_state == pfsync_qid_sstate[q], 1771 ("%s: st->sync_state %d == q %d", 1772 __func__, st->sync_state, q)); 1773 st->sync_state = PFSYNC_S_NONE; 1774 pf_release_state(st); 1775 } 1776 TAILQ_INIT(&b->b_qs[q]); 1777 } 1778 1779 while ((ur = TAILQ_FIRST(&b->b_upd_req_list)) != NULL) { 1780 TAILQ_REMOVE(&b->b_upd_req_list, ur, ur_entry); 1781 free(ur, M_PFSYNC); 1782 } 1783 1784 b->b_len = PFSYNC_MINPKT; 1785 free(b->b_plus, M_PFSYNC); 1786 b->b_plus = NULL; 1787 b->b_pluslen = 0; 1788 } 1789 1790 static void 1791 pfsync_sendout(int schedswi, int c) 1792 { 1793 struct pfsync_softc *sc = V_pfsyncif; 1794 struct ifnet *ifp = sc->sc_ifp; 1795 struct mbuf *m; 1796 struct pfsync_header *ph; 1797 struct pfsync_subheader *subh; 1798 struct pf_kstate *st, *st_next; 1799 struct pfsync_upd_req_item *ur; 1800 struct pfsync_bucket *b = &sc->sc_buckets[c]; 1801 size_t len; 1802 int aflen, offset, count = 0; 1803 enum pfsync_q_id q; 1804 1805 KASSERT(sc != NULL, ("%s: null sc", __func__)); 1806 KASSERT(b->b_len > PFSYNC_MINPKT, 1807 ("%s: sc_len %zu", __func__, b->b_len)); 1808 PFSYNC_BUCKET_LOCK_ASSERT(b); 1809 1810 if (!bpf_peers_present(ifp->if_bpf) && sc->sc_sync_if == NULL) { 1811 pfsync_drop(sc, c); 1812 return; 1813 } 1814 1815 m = m_get2(max_linkhdr + b->b_len, M_NOWAIT, MT_DATA, M_PKTHDR); 1816 if (m == NULL) { 1817 if_inc_counter(sc->sc_ifp, IFCOUNTER_OERRORS, 1); 1818 V_pfsyncstats.pfsyncs_onomem++; 1819 return; 1820 } 1821 m->m_data += max_linkhdr; 1822 bzero(m->m_data, b->b_len); 1823 1824 len = b->b_len; 1825 1826 /* build the ip header */ 1827 switch (sc->sc_sync_peer.ss_family) { 1828 #ifdef INET 1829 case AF_INET: 1830 { 1831 struct ip *ip; 1832 1833 ip = mtod(m, struct ip *); 1834 bcopy(&sc->sc_template.ipv4, ip, sizeof(*ip)); 1835 aflen = offset = sizeof(*ip); 1836 1837 len -= sizeof(union inet_template) - sizeof(struct ip); 1838 ip->ip_len = htons(len); 1839 ip_fillid(ip); 1840 break; 1841 } 1842 #endif 1843 #ifdef INET6 1844 case AF_INET6: 1845 { 1846 struct ip6_hdr *ip6; 1847 1848 ip6 = mtod(m, struct ip6_hdr *); 1849 bcopy(&sc->sc_template.ipv6, ip6, sizeof(*ip6)); 1850 aflen = offset = sizeof(*ip6); 1851 1852 len -= sizeof(union inet_template) - sizeof(struct ip6_hdr); 1853 ip6->ip6_plen = htons(len); 1854 break; 1855 } 1856 #endif 1857 default: 1858 m_freem(m); 1859 pfsync_drop(sc, c); 1860 return; 1861 } 1862 m->m_len = m->m_pkthdr.len = len; 1863 1864 /* build the pfsync header */ 1865 ph = (struct pfsync_header *)(m->m_data + offset); 1866 offset += sizeof(*ph); 1867 1868 ph->version = PFSYNC_VERSION; 1869 ph->len = htons(len - aflen); 1870 bcopy(V_pf_status.pf_chksum, ph->pfcksum, PF_MD5_DIGEST_LENGTH); 1871 1872 /* walk the queues */ 1873 for (q = 0; q < PFSYNC_Q_COUNT; q++) { 1874 if (TAILQ_EMPTY(&b->b_qs[q])) 1875 continue; 1876 1877 subh = (struct pfsync_subheader *)(m->m_data + offset); 1878 offset += sizeof(*subh); 1879 1880 count = 0; 1881 TAILQ_FOREACH_SAFE(st, &b->b_qs[q], sync_list, st_next) { 1882 KASSERT(st->sync_state == pfsync_qid_sstate[q], 1883 ("%s: st->sync_state == q", 1884 __func__)); 1885 /* 1886 * XXXGL: some of write methods do unlocked reads 1887 * of state data :( 1888 */ 1889 pfsync_qs[q].write(st, m->m_data + offset); 1890 offset += pfsync_qs[q].len; 1891 st->sync_state = PFSYNC_S_NONE; 1892 pf_release_state(st); 1893 count++; 1894 } 1895 TAILQ_INIT(&b->b_qs[q]); 1896 1897 subh->action = pfsync_qs[q].action; 1898 subh->count = htons(count); 1899 V_pfsyncstats.pfsyncs_oacts[pfsync_qs[q].action] += count; 1900 } 1901 1902 if (!TAILQ_EMPTY(&b->b_upd_req_list)) { 1903 subh = (struct pfsync_subheader *)(m->m_data + offset); 1904 offset += sizeof(*subh); 1905 1906 count = 0; 1907 while ((ur = TAILQ_FIRST(&b->b_upd_req_list)) != NULL) { 1908 TAILQ_REMOVE(&b->b_upd_req_list, ur, ur_entry); 1909 1910 bcopy(&ur->ur_msg, m->m_data + offset, 1911 sizeof(ur->ur_msg)); 1912 offset += sizeof(ur->ur_msg); 1913 free(ur, M_PFSYNC); 1914 count++; 1915 } 1916 1917 subh->action = PFSYNC_ACT_UPD_REQ; 1918 subh->count = htons(count); 1919 V_pfsyncstats.pfsyncs_oacts[PFSYNC_ACT_UPD_REQ] += count; 1920 } 1921 1922 /* has someone built a custom region for us to add? */ 1923 if (b->b_plus != NULL) { 1924 bcopy(b->b_plus, m->m_data + offset, b->b_pluslen); 1925 offset += b->b_pluslen; 1926 1927 free(b->b_plus, M_PFSYNC); 1928 b->b_plus = NULL; 1929 b->b_pluslen = 0; 1930 } 1931 1932 subh = (struct pfsync_subheader *)(m->m_data + offset); 1933 offset += sizeof(*subh); 1934 1935 subh->action = PFSYNC_ACT_EOF; 1936 subh->count = htons(1); 1937 V_pfsyncstats.pfsyncs_oacts[PFSYNC_ACT_EOF]++; 1938 1939 /* we're done, let's put it on the wire */ 1940 if (bpf_peers_present(ifp->if_bpf)) { 1941 m->m_data += aflen; 1942 m->m_len = m->m_pkthdr.len = len - aflen; 1943 bpf_mtap(ifp->if_bpf, m); 1944 m->m_data -= aflen; 1945 m->m_len = m->m_pkthdr.len = len; 1946 } 1947 1948 if (sc->sc_sync_if == NULL) { 1949 b->b_len = PFSYNC_MINPKT; 1950 m_freem(m); 1951 return; 1952 } 1953 1954 if_inc_counter(sc->sc_ifp, IFCOUNTER_OPACKETS, 1); 1955 if_inc_counter(sc->sc_ifp, IFCOUNTER_OBYTES, m->m_pkthdr.len); 1956 b->b_len = PFSYNC_MINPKT; 1957 1958 if (!_IF_QFULL(&b->b_snd)) 1959 _IF_ENQUEUE(&b->b_snd, m); 1960 else { 1961 m_freem(m); 1962 if_inc_counter(sc->sc_ifp, IFCOUNTER_OQDROPS, 1); 1963 } 1964 if (schedswi) 1965 swi_sched(V_pfsync_swi_cookie, 0); 1966 } 1967 1968 static void 1969 pfsync_insert_state(struct pf_kstate *st) 1970 { 1971 struct pfsync_softc *sc = V_pfsyncif; 1972 struct pfsync_bucket *b = pfsync_get_bucket(sc, st); 1973 1974 if (st->state_flags & PFSTATE_NOSYNC) 1975 return; 1976 1977 if ((st->rule->rule_flag & PFRULE_NOSYNC) || 1978 st->key[PF_SK_WIRE]->proto == IPPROTO_PFSYNC) { 1979 st->state_flags |= PFSTATE_NOSYNC; 1980 return; 1981 } 1982 1983 KASSERT(st->sync_state == PFSYNC_S_NONE, 1984 ("%s: st->sync_state %u", __func__, st->sync_state)); 1985 1986 PFSYNC_BUCKET_LOCK(b); 1987 if (b->b_len == PFSYNC_MINPKT) 1988 callout_reset(&b->b_tmo, 1 * hz, pfsync_timeout, b); 1989 1990 pfsync_q_ins(st, PFSYNC_S_INS, true); 1991 PFSYNC_BUCKET_UNLOCK(b); 1992 1993 st->sync_updates = 0; 1994 } 1995 1996 static int 1997 pfsync_defer(struct pf_kstate *st, struct mbuf *m) 1998 { 1999 struct pfsync_softc *sc = V_pfsyncif; 2000 struct pfsync_deferral *pd; 2001 struct pfsync_bucket *b; 2002 2003 if (m->m_flags & (M_BCAST|M_MCAST)) 2004 return (0); 2005 2006 if (sc == NULL) 2007 return (0); 2008 2009 b = pfsync_get_bucket(sc, st); 2010 2011 PFSYNC_LOCK(sc); 2012 2013 if (!(sc->sc_ifp->if_drv_flags & IFF_DRV_RUNNING) || 2014 !(sc->sc_flags & PFSYNCF_DEFER)) { 2015 PFSYNC_UNLOCK(sc); 2016 return (0); 2017 } 2018 2019 PFSYNC_BUCKET_LOCK(b); 2020 PFSYNC_UNLOCK(sc); 2021 2022 if (b->b_deferred >= 128) 2023 pfsync_undefer(TAILQ_FIRST(&b->b_deferrals), 0); 2024 2025 pd = malloc(sizeof(*pd), M_PFSYNC, M_NOWAIT); 2026 if (pd == NULL) { 2027 PFSYNC_BUCKET_UNLOCK(b); 2028 return (0); 2029 } 2030 b->b_deferred++; 2031 2032 m->m_flags |= M_SKIP_FIREWALL; 2033 st->state_flags |= PFSTATE_ACK; 2034 2035 pd->pd_sc = sc; 2036 pd->pd_st = st; 2037 pf_ref_state(st); 2038 pd->pd_m = m; 2039 2040 TAILQ_INSERT_TAIL(&b->b_deferrals, pd, pd_entry); 2041 callout_init_mtx(&pd->pd_tmo, &b->b_mtx, CALLOUT_RETURNUNLOCKED); 2042 callout_reset(&pd->pd_tmo, (V_pfsync_defer_timeout * hz) / 1000, 2043 pfsync_defer_tmo, pd); 2044 2045 pfsync_push(b); 2046 PFSYNC_BUCKET_UNLOCK(b); 2047 2048 return (1); 2049 } 2050 2051 static void 2052 pfsync_undefer(struct pfsync_deferral *pd, int drop) 2053 { 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 free(pd, M_PFSYNC); 2065 pf_release_state(st); 2066 2067 if (drop) 2068 m_freem(m); 2069 else { 2070 _IF_ENQUEUE(&b->b_snd, m); 2071 pfsync_push(b); 2072 } 2073 } 2074 2075 static void 2076 pfsync_defer_tmo(void *arg) 2077 { 2078 struct epoch_tracker et; 2079 struct pfsync_deferral *pd = arg; 2080 struct pfsync_softc *sc = pd->pd_sc; 2081 struct mbuf *m = pd->pd_m; 2082 struct pf_kstate *st = pd->pd_st; 2083 struct pfsync_bucket *b; 2084 2085 CURVNET_SET(sc->sc_ifp->if_vnet); 2086 2087 b = pfsync_get_bucket(sc, st); 2088 2089 PFSYNC_BUCKET_LOCK_ASSERT(b); 2090 2091 TAILQ_REMOVE(&b->b_deferrals, pd, pd_entry); 2092 b->b_deferred--; 2093 pd->pd_st->state_flags &= ~PFSTATE_ACK; /* XXX: locking! */ 2094 PFSYNC_BUCKET_UNLOCK(b); 2095 free(pd, M_PFSYNC); 2096 2097 if (sc->sc_sync_if == NULL) { 2098 pf_release_state(st); 2099 m_freem(m); 2100 CURVNET_RESTORE(); 2101 return; 2102 } 2103 2104 NET_EPOCH_ENTER(et); 2105 2106 pfsync_tx(sc, m); 2107 2108 pf_release_state(st); 2109 2110 CURVNET_RESTORE(); 2111 NET_EPOCH_EXIT(et); 2112 } 2113 2114 static void 2115 pfsync_undefer_state_locked(struct pf_kstate *st, int drop) 2116 { 2117 struct pfsync_softc *sc = V_pfsyncif; 2118 struct pfsync_deferral *pd; 2119 struct pfsync_bucket *b = pfsync_get_bucket(sc, st); 2120 2121 PFSYNC_BUCKET_LOCK_ASSERT(b); 2122 2123 TAILQ_FOREACH(pd, &b->b_deferrals, pd_entry) { 2124 if (pd->pd_st == st) { 2125 if (callout_stop(&pd->pd_tmo) > 0) 2126 pfsync_undefer(pd, drop); 2127 2128 return; 2129 } 2130 } 2131 2132 panic("%s: unable to find deferred state", __func__); 2133 } 2134 2135 static void 2136 pfsync_undefer_state(struct pf_kstate *st, int drop) 2137 { 2138 struct pfsync_softc *sc = V_pfsyncif; 2139 struct pfsync_bucket *b = pfsync_get_bucket(sc, st); 2140 2141 PFSYNC_BUCKET_LOCK(b); 2142 pfsync_undefer_state_locked(st, drop); 2143 PFSYNC_BUCKET_UNLOCK(b); 2144 } 2145 2146 static struct pfsync_bucket* 2147 pfsync_get_bucket(struct pfsync_softc *sc, struct pf_kstate *st) 2148 { 2149 int c = PF_IDHASH(st) % pfsync_buckets; 2150 return &sc->sc_buckets[c]; 2151 } 2152 2153 static void 2154 pfsync_update_state(struct pf_kstate *st) 2155 { 2156 struct pfsync_softc *sc = V_pfsyncif; 2157 bool sync = false, ref = true; 2158 struct pfsync_bucket *b = pfsync_get_bucket(sc, st); 2159 2160 PF_STATE_LOCK_ASSERT(st); 2161 PFSYNC_BUCKET_LOCK(b); 2162 2163 if (st->state_flags & PFSTATE_ACK) 2164 pfsync_undefer_state_locked(st, 0); 2165 if (st->state_flags & PFSTATE_NOSYNC) { 2166 if (st->sync_state != PFSYNC_S_NONE) 2167 pfsync_q_del(st, true, b); 2168 PFSYNC_BUCKET_UNLOCK(b); 2169 return; 2170 } 2171 2172 if (b->b_len == PFSYNC_MINPKT) 2173 callout_reset(&b->b_tmo, 1 * hz, pfsync_timeout, b); 2174 2175 switch (st->sync_state) { 2176 case PFSYNC_S_UPD_C: 2177 case PFSYNC_S_UPD: 2178 case PFSYNC_S_INS: 2179 /* we're already handling it */ 2180 2181 if (st->key[PF_SK_WIRE]->proto == IPPROTO_TCP) { 2182 st->sync_updates++; 2183 if (st->sync_updates >= sc->sc_maxupdates) 2184 sync = true; 2185 } 2186 break; 2187 2188 case PFSYNC_S_IACK: 2189 pfsync_q_del(st, false, b); 2190 ref = false; 2191 /* FALLTHROUGH */ 2192 2193 case PFSYNC_S_NONE: 2194 pfsync_q_ins(st, PFSYNC_S_UPD_C, ref); 2195 st->sync_updates = 0; 2196 break; 2197 2198 default: 2199 panic("%s: unexpected sync state %d", __func__, st->sync_state); 2200 } 2201 2202 if (sync || (time_uptime - st->pfsync_time) < 2) 2203 pfsync_push(b); 2204 2205 PFSYNC_BUCKET_UNLOCK(b); 2206 } 2207 2208 static void 2209 pfsync_request_update(u_int32_t creatorid, u_int64_t id) 2210 { 2211 struct pfsync_softc *sc = V_pfsyncif; 2212 struct pfsync_bucket *b = &sc->sc_buckets[0]; 2213 struct pfsync_upd_req_item *item; 2214 size_t nlen = sizeof(struct pfsync_upd_req); 2215 2216 PFSYNC_BUCKET_LOCK_ASSERT(b); 2217 2218 /* 2219 * This code does a bit to prevent multiple update requests for the 2220 * same state being generated. It searches current subheader queue, 2221 * but it doesn't lookup into queue of already packed datagrams. 2222 */ 2223 TAILQ_FOREACH(item, &b->b_upd_req_list, ur_entry) 2224 if (item->ur_msg.id == id && 2225 item->ur_msg.creatorid == creatorid) 2226 return; 2227 2228 item = malloc(sizeof(*item), M_PFSYNC, M_NOWAIT); 2229 if (item == NULL) 2230 return; /* XXX stats */ 2231 2232 item->ur_msg.id = id; 2233 item->ur_msg.creatorid = creatorid; 2234 2235 if (TAILQ_EMPTY(&b->b_upd_req_list)) 2236 nlen += sizeof(struct pfsync_subheader); 2237 2238 if (b->b_len + nlen > sc->sc_ifp->if_mtu) { 2239 pfsync_sendout(0, 0); 2240 2241 nlen = sizeof(struct pfsync_subheader) + 2242 sizeof(struct pfsync_upd_req); 2243 } 2244 2245 TAILQ_INSERT_TAIL(&b->b_upd_req_list, item, ur_entry); 2246 b->b_len += nlen; 2247 2248 pfsync_push(b); 2249 } 2250 2251 static bool 2252 pfsync_update_state_req(struct pf_kstate *st) 2253 { 2254 struct pfsync_softc *sc = V_pfsyncif; 2255 bool ref = true, full = false; 2256 struct pfsync_bucket *b = pfsync_get_bucket(sc, st); 2257 2258 PF_STATE_LOCK_ASSERT(st); 2259 PFSYNC_BUCKET_LOCK(b); 2260 2261 if (st->state_flags & PFSTATE_NOSYNC) { 2262 if (st->sync_state != PFSYNC_S_NONE) 2263 pfsync_q_del(st, true, b); 2264 PFSYNC_BUCKET_UNLOCK(b); 2265 return (full); 2266 } 2267 2268 switch (st->sync_state) { 2269 case PFSYNC_S_UPD_C: 2270 case PFSYNC_S_IACK: 2271 pfsync_q_del(st, false, b); 2272 ref = false; 2273 /* FALLTHROUGH */ 2274 2275 case PFSYNC_S_NONE: 2276 pfsync_q_ins(st, PFSYNC_S_UPD, ref); 2277 pfsync_push(b); 2278 break; 2279 2280 case PFSYNC_S_INS: 2281 case PFSYNC_S_UPD: 2282 case PFSYNC_S_DEL_C: 2283 /* we're already handling it */ 2284 break; 2285 2286 default: 2287 panic("%s: unexpected sync state %d", __func__, st->sync_state); 2288 } 2289 2290 if ((sc->sc_ifp->if_mtu - b->b_len) < sizeof(union pfsync_state_union)) 2291 full = true; 2292 2293 PFSYNC_BUCKET_UNLOCK(b); 2294 2295 return (full); 2296 } 2297 2298 static void 2299 pfsync_delete_state(struct pf_kstate *st) 2300 { 2301 struct pfsync_softc *sc = V_pfsyncif; 2302 struct pfsync_bucket *b = pfsync_get_bucket(sc, st); 2303 bool ref = true; 2304 2305 PFSYNC_BUCKET_LOCK(b); 2306 if (st->state_flags & PFSTATE_ACK) 2307 pfsync_undefer_state_locked(st, 1); 2308 if (st->state_flags & PFSTATE_NOSYNC) { 2309 if (st->sync_state != PFSYNC_S_NONE) 2310 pfsync_q_del(st, true, b); 2311 PFSYNC_BUCKET_UNLOCK(b); 2312 return; 2313 } 2314 2315 if (b->b_len == PFSYNC_MINPKT) 2316 callout_reset(&b->b_tmo, 1 * hz, pfsync_timeout, b); 2317 2318 switch (st->sync_state) { 2319 case PFSYNC_S_INS: 2320 /* We never got to tell the world so just forget about it. */ 2321 pfsync_q_del(st, true, b); 2322 break; 2323 2324 case PFSYNC_S_UPD_C: 2325 case PFSYNC_S_UPD: 2326 case PFSYNC_S_IACK: 2327 pfsync_q_del(st, false, b); 2328 ref = false; 2329 /* FALLTHROUGH */ 2330 2331 case PFSYNC_S_NONE: 2332 pfsync_q_ins(st, PFSYNC_S_DEL_C, ref); 2333 break; 2334 2335 default: 2336 panic("%s: unexpected sync state %d", __func__, st->sync_state); 2337 } 2338 2339 PFSYNC_BUCKET_UNLOCK(b); 2340 } 2341 2342 static void 2343 pfsync_clear_states(u_int32_t creatorid, const char *ifname) 2344 { 2345 struct { 2346 struct pfsync_subheader subh; 2347 struct pfsync_clr clr; 2348 } __packed r; 2349 2350 bzero(&r, sizeof(r)); 2351 2352 r.subh.action = PFSYNC_ACT_CLR; 2353 r.subh.count = htons(1); 2354 V_pfsyncstats.pfsyncs_oacts[PFSYNC_ACT_CLR]++; 2355 2356 strlcpy(r.clr.ifname, ifname, sizeof(r.clr.ifname)); 2357 r.clr.creatorid = creatorid; 2358 2359 pfsync_send_plus(&r, sizeof(r)); 2360 } 2361 2362 static enum pfsync_q_id 2363 pfsync_sstate_to_qid(u_int8_t sync_state) 2364 { 2365 struct pfsync_softc *sc = V_pfsyncif; 2366 2367 switch (sync_state) { 2368 case PFSYNC_S_INS: 2369 switch (sc->sc_version) { 2370 case PFSYNC_MSG_VERSION_1301: 2371 return PFSYNC_Q_INS_1301; 2372 case PFSYNC_MSG_VERSION_1400: 2373 return PFSYNC_Q_INS_1400; 2374 } 2375 break; 2376 case PFSYNC_S_IACK: 2377 return PFSYNC_Q_IACK; 2378 case PFSYNC_S_UPD: 2379 switch (sc->sc_version) { 2380 case PFSYNC_MSG_VERSION_1301: 2381 return PFSYNC_Q_UPD_1301; 2382 case PFSYNC_MSG_VERSION_1400: 2383 return PFSYNC_Q_UPD_1400; 2384 } 2385 break; 2386 case PFSYNC_S_UPD_C: 2387 return PFSYNC_Q_UPD_C; 2388 case PFSYNC_S_DEL_C: 2389 return PFSYNC_Q_DEL_C; 2390 default: 2391 panic("%s: Unsupported st->sync_state 0x%02x", 2392 __func__, sync_state); 2393 } 2394 2395 panic("%s: Unsupported pfsync_msg_version %d", 2396 __func__, sc->sc_version); 2397 } 2398 2399 static void 2400 pfsync_q_ins(struct pf_kstate *st, int sync_state, bool ref) 2401 { 2402 enum pfsync_q_id q = pfsync_sstate_to_qid(sync_state); 2403 struct pfsync_softc *sc = V_pfsyncif; 2404 size_t nlen = pfsync_qs[q].len; 2405 struct pfsync_bucket *b = pfsync_get_bucket(sc, st); 2406 2407 PFSYNC_BUCKET_LOCK_ASSERT(b); 2408 2409 KASSERT(st->sync_state == PFSYNC_S_NONE, 2410 ("%s: st->sync_state %u", __func__, st->sync_state)); 2411 KASSERT(b->b_len >= PFSYNC_MINPKT, ("pfsync pkt len is too low %zu", 2412 b->b_len)); 2413 2414 if (TAILQ_EMPTY(&b->b_qs[q])) 2415 nlen += sizeof(struct pfsync_subheader); 2416 2417 if (b->b_len + nlen > sc->sc_ifp->if_mtu) { 2418 pfsync_sendout(1, b->b_id); 2419 2420 nlen = sizeof(struct pfsync_subheader) + pfsync_qs[q].len; 2421 } 2422 2423 b->b_len += nlen; 2424 st->sync_state = pfsync_qid_sstate[q]; 2425 TAILQ_INSERT_TAIL(&b->b_qs[q], st, sync_list); 2426 if (ref) 2427 pf_ref_state(st); 2428 } 2429 2430 static void 2431 pfsync_q_del(struct pf_kstate *st, bool unref, struct pfsync_bucket *b) 2432 { 2433 enum pfsync_q_id q; 2434 2435 PFSYNC_BUCKET_LOCK_ASSERT(b); 2436 KASSERT(st->sync_state != PFSYNC_S_NONE, 2437 ("%s: st->sync_state != PFSYNC_S_NONE", __func__)); 2438 2439 q = pfsync_sstate_to_qid(st->sync_state); 2440 b->b_len -= pfsync_qs[q].len; 2441 TAILQ_REMOVE(&b->b_qs[q], st, sync_list); 2442 st->sync_state = PFSYNC_S_NONE; 2443 if (unref) 2444 pf_release_state(st); 2445 2446 if (TAILQ_EMPTY(&b->b_qs[q])) 2447 b->b_len -= sizeof(struct pfsync_subheader); 2448 } 2449 2450 static void 2451 pfsync_bulk_start(void) 2452 { 2453 struct pfsync_softc *sc = V_pfsyncif; 2454 2455 if (V_pf_status.debug >= PF_DEBUG_MISC) 2456 printf("pfsync: received bulk update request\n"); 2457 2458 PFSYNC_BLOCK(sc); 2459 2460 sc->sc_ureq_received = time_uptime; 2461 sc->sc_bulk_hashid = 0; 2462 sc->sc_bulk_stateid = 0; 2463 pfsync_bulk_status(PFSYNC_BUS_START); 2464 callout_reset(&sc->sc_bulk_tmo, 1, pfsync_bulk_update, sc); 2465 PFSYNC_BUNLOCK(sc); 2466 } 2467 2468 static void 2469 pfsync_bulk_update(void *arg) 2470 { 2471 struct pfsync_softc *sc = arg; 2472 struct pf_kstate *s; 2473 int i; 2474 2475 PFSYNC_BLOCK_ASSERT(sc); 2476 CURVNET_SET(sc->sc_ifp->if_vnet); 2477 2478 /* 2479 * Start with last state from previous invocation. 2480 * It may had gone, in this case start from the 2481 * hash slot. 2482 */ 2483 s = pf_find_state_byid(sc->sc_bulk_stateid, sc->sc_bulk_creatorid); 2484 2485 if (s != NULL) 2486 i = PF_IDHASH(s); 2487 else 2488 i = sc->sc_bulk_hashid; 2489 2490 for (; i <= V_pf_hashmask; i++) { 2491 struct pf_idhash *ih = &V_pf_idhash[i]; 2492 2493 if (s != NULL) 2494 PF_HASHROW_ASSERT(ih); 2495 else { 2496 PF_HASHROW_LOCK(ih); 2497 s = LIST_FIRST(&ih->states); 2498 } 2499 2500 for (; s; s = LIST_NEXT(s, entry)) { 2501 if (s->sync_state == PFSYNC_S_NONE && 2502 s->timeout < PFTM_MAX && 2503 s->pfsync_time <= sc->sc_ureq_received) { 2504 if (pfsync_update_state_req(s)) { 2505 /* We've filled a packet. */ 2506 sc->sc_bulk_hashid = i; 2507 sc->sc_bulk_stateid = s->id; 2508 sc->sc_bulk_creatorid = s->creatorid; 2509 PF_HASHROW_UNLOCK(ih); 2510 callout_reset(&sc->sc_bulk_tmo, 1, 2511 pfsync_bulk_update, sc); 2512 goto full; 2513 } 2514 } 2515 } 2516 PF_HASHROW_UNLOCK(ih); 2517 } 2518 2519 /* We're done. */ 2520 pfsync_bulk_status(PFSYNC_BUS_END); 2521 full: 2522 CURVNET_RESTORE(); 2523 } 2524 2525 static void 2526 pfsync_bulk_status(u_int8_t status) 2527 { 2528 struct { 2529 struct pfsync_subheader subh; 2530 struct pfsync_bus bus; 2531 } __packed r; 2532 2533 struct pfsync_softc *sc = V_pfsyncif; 2534 2535 bzero(&r, sizeof(r)); 2536 2537 r.subh.action = PFSYNC_ACT_BUS; 2538 r.subh.count = htons(1); 2539 V_pfsyncstats.pfsyncs_oacts[PFSYNC_ACT_BUS]++; 2540 2541 r.bus.creatorid = V_pf_status.hostid; 2542 r.bus.endtime = htonl(time_uptime - sc->sc_ureq_received); 2543 r.bus.status = status; 2544 2545 pfsync_send_plus(&r, sizeof(r)); 2546 } 2547 2548 static void 2549 pfsync_bulk_fail(void *arg) 2550 { 2551 struct pfsync_softc *sc = arg; 2552 struct pfsync_bucket *b = &sc->sc_buckets[0]; 2553 2554 CURVNET_SET(sc->sc_ifp->if_vnet); 2555 2556 PFSYNC_BLOCK_ASSERT(sc); 2557 2558 if (sc->sc_bulk_tries++ < PFSYNC_MAX_BULKTRIES) { 2559 /* Try again */ 2560 callout_reset(&sc->sc_bulkfail_tmo, 5 * hz, 2561 pfsync_bulk_fail, V_pfsyncif); 2562 PFSYNC_BUCKET_LOCK(b); 2563 pfsync_request_update(0, 0); 2564 PFSYNC_BUCKET_UNLOCK(b); 2565 } else { 2566 /* Pretend like the transfer was ok. */ 2567 sc->sc_ureq_sent = 0; 2568 sc->sc_bulk_tries = 0; 2569 PFSYNC_LOCK(sc); 2570 if (!(sc->sc_flags & PFSYNCF_OK) && carp_demote_adj_p) 2571 (*carp_demote_adj_p)(-V_pfsync_carp_adj, 2572 "pfsync bulk fail"); 2573 sc->sc_flags |= PFSYNCF_OK; 2574 PFSYNC_UNLOCK(sc); 2575 if (V_pf_status.debug >= PF_DEBUG_MISC) 2576 printf("pfsync: failed to receive bulk update\n"); 2577 } 2578 2579 CURVNET_RESTORE(); 2580 } 2581 2582 static void 2583 pfsync_send_plus(void *plus, size_t pluslen) 2584 { 2585 struct pfsync_softc *sc = V_pfsyncif; 2586 struct pfsync_bucket *b = &sc->sc_buckets[0]; 2587 uint8_t *newplus; 2588 2589 PFSYNC_BUCKET_LOCK(b); 2590 2591 if (b->b_len + pluslen > sc->sc_ifp->if_mtu) 2592 pfsync_sendout(1, b->b_id); 2593 2594 newplus = malloc(pluslen + b->b_pluslen, M_PFSYNC, M_NOWAIT); 2595 if (newplus == NULL) 2596 goto out; 2597 2598 if (b->b_plus != NULL) { 2599 memcpy(newplus, b->b_plus, b->b_pluslen); 2600 free(b->b_plus, M_PFSYNC); 2601 } else { 2602 MPASS(b->b_pluslen == 0); 2603 } 2604 memcpy(newplus + b->b_pluslen, plus, pluslen); 2605 2606 b->b_plus = newplus; 2607 b->b_pluslen += pluslen; 2608 b->b_len += pluslen; 2609 2610 pfsync_sendout(1, b->b_id); 2611 2612 out: 2613 PFSYNC_BUCKET_UNLOCK(b); 2614 } 2615 2616 static void 2617 pfsync_timeout(void *arg) 2618 { 2619 struct pfsync_bucket *b = arg; 2620 2621 CURVNET_SET(b->b_sc->sc_ifp->if_vnet); 2622 PFSYNC_BUCKET_LOCK(b); 2623 pfsync_push(b); 2624 PFSYNC_BUCKET_UNLOCK(b); 2625 CURVNET_RESTORE(); 2626 } 2627 2628 static void 2629 pfsync_push(struct pfsync_bucket *b) 2630 { 2631 2632 PFSYNC_BUCKET_LOCK_ASSERT(b); 2633 2634 b->b_flags |= PFSYNCF_BUCKET_PUSH; 2635 swi_sched(V_pfsync_swi_cookie, 0); 2636 } 2637 2638 static void 2639 pfsync_push_all(struct pfsync_softc *sc) 2640 { 2641 int c; 2642 struct pfsync_bucket *b; 2643 2644 for (c = 0; c < pfsync_buckets; c++) { 2645 b = &sc->sc_buckets[c]; 2646 2647 PFSYNC_BUCKET_LOCK(b); 2648 pfsync_push(b); 2649 PFSYNC_BUCKET_UNLOCK(b); 2650 } 2651 } 2652 2653 static void 2654 pfsync_tx(struct pfsync_softc *sc, struct mbuf *m) 2655 { 2656 struct ip *ip; 2657 int af, error = 0; 2658 2659 ip = mtod(m, struct ip *); 2660 MPASS(ip->ip_v == IPVERSION || ip->ip_v == (IPV6_VERSION >> 4)); 2661 2662 af = ip->ip_v == IPVERSION ? AF_INET : AF_INET6; 2663 2664 /* 2665 * We distinguish between a deferral packet and our 2666 * own pfsync packet based on M_SKIP_FIREWALL 2667 * flag. This is XXX. 2668 */ 2669 switch (af) { 2670 #ifdef INET 2671 case AF_INET: 2672 if (m->m_flags & M_SKIP_FIREWALL) { 2673 error = ip_output(m, NULL, NULL, 0, 2674 NULL, NULL); 2675 } else { 2676 error = ip_output(m, NULL, NULL, 2677 IP_RAWOUTPUT, &sc->sc_imo, NULL); 2678 } 2679 break; 2680 #endif 2681 #ifdef INET6 2682 case AF_INET6: 2683 if (m->m_flags & M_SKIP_FIREWALL) { 2684 error = ip6_output(m, NULL, NULL, 0, 2685 NULL, NULL, NULL); 2686 } else { 2687 error = ip6_output(m, NULL, NULL, 0, 2688 &sc->sc_im6o, NULL, NULL); 2689 } 2690 break; 2691 #endif 2692 } 2693 2694 if (error == 0) 2695 V_pfsyncstats.pfsyncs_opackets++; 2696 else 2697 V_pfsyncstats.pfsyncs_oerrors++; 2698 2699 } 2700 2701 static void 2702 pfsyncintr(void *arg) 2703 { 2704 struct epoch_tracker et; 2705 struct pfsync_softc *sc = arg; 2706 struct pfsync_bucket *b; 2707 struct mbuf *m, *n; 2708 int c; 2709 2710 NET_EPOCH_ENTER(et); 2711 CURVNET_SET(sc->sc_ifp->if_vnet); 2712 2713 for (c = 0; c < pfsync_buckets; c++) { 2714 b = &sc->sc_buckets[c]; 2715 2716 PFSYNC_BUCKET_LOCK(b); 2717 if ((b->b_flags & PFSYNCF_BUCKET_PUSH) && b->b_len > PFSYNC_MINPKT) { 2718 pfsync_sendout(0, b->b_id); 2719 b->b_flags &= ~PFSYNCF_BUCKET_PUSH; 2720 } 2721 _IF_DEQUEUE_ALL(&b->b_snd, m); 2722 PFSYNC_BUCKET_UNLOCK(b); 2723 2724 for (; m != NULL; m = n) { 2725 n = m->m_nextpkt; 2726 m->m_nextpkt = NULL; 2727 2728 pfsync_tx(sc, m); 2729 } 2730 } 2731 CURVNET_RESTORE(); 2732 NET_EPOCH_EXIT(et); 2733 } 2734 2735 static int 2736 pfsync_multicast_setup(struct pfsync_softc *sc, struct ifnet *ifp, 2737 struct in_mfilter* imf, struct in6_mfilter* im6f) 2738 { 2739 #ifdef INET 2740 struct ip_moptions *imo = &sc->sc_imo; 2741 #endif 2742 #ifdef INET6 2743 struct ip6_moptions *im6o = &sc->sc_im6o; 2744 struct sockaddr_in6 *syncpeer_sa6 = NULL; 2745 #endif 2746 2747 if (!(ifp->if_flags & IFF_MULTICAST)) 2748 return (EADDRNOTAVAIL); 2749 2750 switch (sc->sc_sync_peer.ss_family) { 2751 #ifdef INET 2752 case AF_INET: 2753 { 2754 int error; 2755 2756 ip_mfilter_init(&imo->imo_head); 2757 imo->imo_multicast_vif = -1; 2758 if ((error = in_joingroup(ifp, 2759 &((struct sockaddr_in *)&sc->sc_sync_peer)->sin_addr, NULL, 2760 &imf->imf_inm)) != 0) 2761 return (error); 2762 2763 ip_mfilter_insert(&imo->imo_head, imf); 2764 imo->imo_multicast_ifp = ifp; 2765 imo->imo_multicast_ttl = PFSYNC_DFLTTL; 2766 imo->imo_multicast_loop = 0; 2767 break; 2768 } 2769 #endif 2770 #ifdef INET6 2771 case AF_INET6: 2772 { 2773 int error; 2774 2775 syncpeer_sa6 = (struct sockaddr_in6 *)&sc->sc_sync_peer; 2776 if ((error = in6_setscope(&syncpeer_sa6->sin6_addr, ifp, NULL))) 2777 return (error); 2778 2779 ip6_mfilter_init(&im6o->im6o_head); 2780 if ((error = in6_joingroup(ifp, &syncpeer_sa6->sin6_addr, NULL, 2781 &(im6f->im6f_in6m), 0)) != 0) 2782 return (error); 2783 2784 ip6_mfilter_insert(&im6o->im6o_head, im6f); 2785 im6o->im6o_multicast_ifp = ifp; 2786 im6o->im6o_multicast_hlim = PFSYNC_DFLTTL; 2787 im6o->im6o_multicast_loop = 0; 2788 break; 2789 } 2790 #endif 2791 } 2792 2793 return (0); 2794 } 2795 2796 static void 2797 pfsync_multicast_cleanup(struct pfsync_softc *sc) 2798 { 2799 #ifdef INET 2800 struct ip_moptions *imo = &sc->sc_imo; 2801 struct in_mfilter *imf; 2802 2803 while ((imf = ip_mfilter_first(&imo->imo_head)) != NULL) { 2804 ip_mfilter_remove(&imo->imo_head, imf); 2805 in_leavegroup(imf->imf_inm, NULL); 2806 ip_mfilter_free(imf); 2807 } 2808 imo->imo_multicast_ifp = NULL; 2809 #endif 2810 2811 #ifdef INET6 2812 struct ip6_moptions *im6o = &sc->sc_im6o; 2813 struct in6_mfilter *im6f; 2814 2815 while ((im6f = ip6_mfilter_first(&im6o->im6o_head)) != NULL) { 2816 ip6_mfilter_remove(&im6o->im6o_head, im6f); 2817 in6_leavegroup(im6f->im6f_in6m, NULL); 2818 ip6_mfilter_free(im6f); 2819 } 2820 im6o->im6o_multicast_ifp = NULL; 2821 #endif 2822 } 2823 2824 void 2825 pfsync_detach_ifnet(struct ifnet *ifp) 2826 { 2827 struct pfsync_softc *sc = V_pfsyncif; 2828 2829 if (sc == NULL) 2830 return; 2831 2832 PFSYNC_LOCK(sc); 2833 2834 if (sc->sc_sync_if == ifp) { 2835 /* We don't need mutlicast cleanup here, because the interface 2836 * is going away. We do need to ensure we don't try to do 2837 * cleanup later. 2838 */ 2839 ip_mfilter_init(&sc->sc_imo.imo_head); 2840 sc->sc_imo.imo_multicast_ifp = NULL; 2841 sc->sc_im6o.im6o_multicast_ifp = NULL; 2842 sc->sc_sync_if = NULL; 2843 } 2844 2845 PFSYNC_UNLOCK(sc); 2846 } 2847 2848 static int 2849 pfsync_pfsyncreq_to_kstatus(struct pfsyncreq *pfsyncr, struct pfsync_kstatus *status) 2850 { 2851 struct sockaddr_storage sa; 2852 status->maxupdates = pfsyncr->pfsyncr_maxupdates; 2853 status->flags = pfsyncr->pfsyncr_defer; 2854 2855 strlcpy(status->syncdev, pfsyncr->pfsyncr_syncdev, IFNAMSIZ); 2856 2857 memset(&sa, 0, sizeof(sa)); 2858 if (pfsyncr->pfsyncr_syncpeer.s_addr != 0) { 2859 struct sockaddr_in *in = (struct sockaddr_in *)&sa; 2860 in->sin_family = AF_INET; 2861 in->sin_len = sizeof(*in); 2862 in->sin_addr.s_addr = pfsyncr->pfsyncr_syncpeer.s_addr; 2863 } 2864 status->syncpeer = sa; 2865 2866 return 0; 2867 } 2868 2869 static int 2870 pfsync_kstatus_to_softc(struct pfsync_kstatus *status, struct pfsync_softc *sc) 2871 { 2872 struct ifnet *sifp; 2873 struct in_mfilter *imf = NULL; 2874 struct in6_mfilter *im6f = NULL; 2875 int error; 2876 int c; 2877 2878 if ((status->maxupdates < 0) || (status->maxupdates > 255)) 2879 return (EINVAL); 2880 2881 if (status->syncdev[0] == '\0') 2882 sifp = NULL; 2883 else if ((sifp = ifunit_ref(status->syncdev)) == NULL) 2884 return (EINVAL); 2885 2886 switch (status->syncpeer.ss_family) { 2887 #ifdef INET 2888 case AF_UNSPEC: 2889 case AF_INET: { 2890 struct sockaddr_in *status_sin; 2891 status_sin = (struct sockaddr_in *)&(status->syncpeer); 2892 if (sifp != NULL) { 2893 if (status_sin->sin_addr.s_addr == 0 || 2894 status_sin->sin_addr.s_addr == 2895 htonl(INADDR_PFSYNC_GROUP)) { 2896 status_sin->sin_family = AF_INET; 2897 status_sin->sin_len = sizeof(*status_sin); 2898 status_sin->sin_addr.s_addr = 2899 htonl(INADDR_PFSYNC_GROUP); 2900 } 2901 2902 if (IN_MULTICAST(ntohl(status_sin->sin_addr.s_addr))) { 2903 imf = ip_mfilter_alloc(M_WAITOK, 0, 0); 2904 } 2905 } 2906 break; 2907 } 2908 #endif 2909 #ifdef INET6 2910 case AF_INET6: { 2911 struct sockaddr_in6 *status_sin6; 2912 status_sin6 = (struct sockaddr_in6*)&(status->syncpeer); 2913 if (sifp != NULL) { 2914 if (IN6_IS_ADDR_UNSPECIFIED(&status_sin6->sin6_addr) || 2915 IN6_ARE_ADDR_EQUAL(&status_sin6->sin6_addr, 2916 &in6addr_linklocal_pfsync_group)) { 2917 status_sin6->sin6_family = AF_INET6; 2918 status_sin6->sin6_len = sizeof(*status_sin6); 2919 status_sin6->sin6_addr = 2920 in6addr_linklocal_pfsync_group; 2921 } 2922 2923 if (IN6_IS_ADDR_MULTICAST(&status_sin6->sin6_addr)) { 2924 im6f = ip6_mfilter_alloc(M_WAITOK, 0, 0); 2925 } 2926 } 2927 break; 2928 } 2929 #endif 2930 } 2931 2932 PFSYNC_LOCK(sc); 2933 2934 switch (status->version) { 2935 case PFSYNC_MSG_VERSION_UNSPECIFIED: 2936 sc->sc_version = PFSYNC_MSG_VERSION_DEFAULT; 2937 break; 2938 case PFSYNC_MSG_VERSION_1301: 2939 case PFSYNC_MSG_VERSION_1400: 2940 sc->sc_version = status->version; 2941 break; 2942 default: 2943 PFSYNC_UNLOCK(sc); 2944 return (EINVAL); 2945 } 2946 2947 switch (status->syncpeer.ss_family) { 2948 case AF_INET: { 2949 struct sockaddr_in *status_sin = (struct sockaddr_in *)&(status->syncpeer); 2950 struct sockaddr_in *sc_sin = (struct sockaddr_in *)&sc->sc_sync_peer; 2951 sc_sin->sin_family = AF_INET; 2952 sc_sin->sin_len = sizeof(*sc_sin); 2953 if (status_sin->sin_addr.s_addr == 0) { 2954 sc_sin->sin_addr.s_addr = htonl(INADDR_PFSYNC_GROUP); 2955 } else { 2956 sc_sin->sin_addr.s_addr = status_sin->sin_addr.s_addr; 2957 } 2958 break; 2959 } 2960 case AF_INET6: { 2961 struct sockaddr_in6 *status_sin = (struct sockaddr_in6 *)&(status->syncpeer); 2962 struct sockaddr_in6 *sc_sin = (struct sockaddr_in6 *)&sc->sc_sync_peer; 2963 sc_sin->sin6_family = AF_INET6; 2964 sc_sin->sin6_len = sizeof(*sc_sin); 2965 if(IN6_IS_ADDR_UNSPECIFIED(&status_sin->sin6_addr)) { 2966 sc_sin->sin6_addr = in6addr_linklocal_pfsync_group; 2967 } else { 2968 sc_sin->sin6_addr = status_sin->sin6_addr; 2969 } 2970 break; 2971 } 2972 } 2973 2974 sc->sc_maxupdates = status->maxupdates; 2975 if (status->flags & PFSYNCF_DEFER) { 2976 sc->sc_flags |= PFSYNCF_DEFER; 2977 V_pfsync_defer_ptr = pfsync_defer; 2978 } else { 2979 sc->sc_flags &= ~PFSYNCF_DEFER; 2980 V_pfsync_defer_ptr = NULL; 2981 } 2982 2983 if (sifp == NULL) { 2984 if (sc->sc_sync_if) 2985 if_rele(sc->sc_sync_if); 2986 sc->sc_sync_if = NULL; 2987 pfsync_multicast_cleanup(sc); 2988 PFSYNC_UNLOCK(sc); 2989 return (0); 2990 } 2991 2992 for (c = 0; c < pfsync_buckets; c++) { 2993 PFSYNC_BUCKET_LOCK(&sc->sc_buckets[c]); 2994 if (sc->sc_buckets[c].b_len > PFSYNC_MINPKT && 2995 (sifp->if_mtu < sc->sc_ifp->if_mtu || 2996 (sc->sc_sync_if != NULL && 2997 sifp->if_mtu < sc->sc_sync_if->if_mtu) || 2998 sifp->if_mtu < MCLBYTES - sizeof(struct ip))) 2999 pfsync_sendout(1, c); 3000 PFSYNC_BUCKET_UNLOCK(&sc->sc_buckets[c]); 3001 } 3002 3003 pfsync_multicast_cleanup(sc); 3004 3005 if (((sc->sc_sync_peer.ss_family == AF_INET) && 3006 IN_MULTICAST(ntohl(((struct sockaddr_in *) 3007 &sc->sc_sync_peer)->sin_addr.s_addr))) || 3008 ((sc->sc_sync_peer.ss_family == AF_INET6) && 3009 IN6_IS_ADDR_MULTICAST(&((struct sockaddr_in6*) 3010 &sc->sc_sync_peer)->sin6_addr))) { 3011 error = pfsync_multicast_setup(sc, sifp, imf, im6f); 3012 if (error) { 3013 if_rele(sifp); 3014 PFSYNC_UNLOCK(sc); 3015 #ifdef INET 3016 if (imf != NULL) 3017 ip_mfilter_free(imf); 3018 #endif 3019 #ifdef INET6 3020 if (im6f != NULL) 3021 ip6_mfilter_free(im6f); 3022 #endif 3023 return (error); 3024 } 3025 } 3026 if (sc->sc_sync_if) 3027 if_rele(sc->sc_sync_if); 3028 sc->sc_sync_if = sifp; 3029 3030 switch (sc->sc_sync_peer.ss_family) { 3031 #ifdef INET 3032 case AF_INET: { 3033 struct ip *ip; 3034 ip = &sc->sc_template.ipv4; 3035 bzero(ip, sizeof(*ip)); 3036 ip->ip_v = IPVERSION; 3037 ip->ip_hl = sizeof(sc->sc_template.ipv4) >> 2; 3038 ip->ip_tos = IPTOS_LOWDELAY; 3039 /* len and id are set later. */ 3040 ip->ip_off = htons(IP_DF); 3041 ip->ip_ttl = PFSYNC_DFLTTL; 3042 ip->ip_p = IPPROTO_PFSYNC; 3043 ip->ip_src.s_addr = INADDR_ANY; 3044 ip->ip_dst = ((struct sockaddr_in *)&sc->sc_sync_peer)->sin_addr; 3045 break; 3046 } 3047 #endif 3048 #ifdef INET6 3049 case AF_INET6: { 3050 struct ip6_hdr *ip6; 3051 ip6 = &sc->sc_template.ipv6; 3052 bzero(ip6, sizeof(*ip6)); 3053 ip6->ip6_vfc = IPV6_VERSION; 3054 ip6->ip6_hlim = PFSYNC_DFLTTL; 3055 ip6->ip6_nxt = IPPROTO_PFSYNC; 3056 ip6->ip6_dst = ((struct sockaddr_in6 *)&sc->sc_sync_peer)->sin6_addr; 3057 3058 struct epoch_tracker et; 3059 NET_EPOCH_ENTER(et); 3060 in6_selectsrc_addr(if_getfib(sc->sc_sync_if), &ip6->ip6_dst, 0, 3061 sc->sc_sync_if, &ip6->ip6_src, NULL); 3062 NET_EPOCH_EXIT(et); 3063 break; 3064 } 3065 #endif 3066 } 3067 3068 /* Request a full state table update. */ 3069 if ((sc->sc_flags & PFSYNCF_OK) && carp_demote_adj_p) 3070 (*carp_demote_adj_p)(V_pfsync_carp_adj, 3071 "pfsync bulk start"); 3072 sc->sc_flags &= ~PFSYNCF_OK; 3073 if (V_pf_status.debug >= PF_DEBUG_MISC) 3074 printf("pfsync: requesting bulk update\n"); 3075 PFSYNC_UNLOCK(sc); 3076 PFSYNC_BUCKET_LOCK(&sc->sc_buckets[0]); 3077 pfsync_request_update(0, 0); 3078 PFSYNC_BUCKET_UNLOCK(&sc->sc_buckets[0]); 3079 PFSYNC_BLOCK(sc); 3080 sc->sc_ureq_sent = time_uptime; 3081 callout_reset(&sc->sc_bulkfail_tmo, 5 * hz, pfsync_bulk_fail, sc); 3082 PFSYNC_BUNLOCK(sc); 3083 return (0); 3084 } 3085 3086 static void 3087 pfsync_pointers_init(void) 3088 { 3089 3090 PF_RULES_WLOCK(); 3091 V_pfsync_state_import_ptr = pfsync_state_import; 3092 V_pfsync_insert_state_ptr = pfsync_insert_state; 3093 V_pfsync_update_state_ptr = pfsync_update_state; 3094 V_pfsync_delete_state_ptr = pfsync_delete_state; 3095 V_pfsync_clear_states_ptr = pfsync_clear_states; 3096 V_pfsync_defer_ptr = pfsync_defer; 3097 PF_RULES_WUNLOCK(); 3098 } 3099 3100 static void 3101 pfsync_pointers_uninit(void) 3102 { 3103 3104 PF_RULES_WLOCK(); 3105 V_pfsync_state_import_ptr = NULL; 3106 V_pfsync_insert_state_ptr = NULL; 3107 V_pfsync_update_state_ptr = NULL; 3108 V_pfsync_delete_state_ptr = NULL; 3109 V_pfsync_clear_states_ptr = NULL; 3110 V_pfsync_defer_ptr = NULL; 3111 PF_RULES_WUNLOCK(); 3112 } 3113 3114 static void 3115 vnet_pfsync_init(const void *unused __unused) 3116 { 3117 int error; 3118 3119 V_pfsync_cloner = if_clone_simple(pfsyncname, 3120 pfsync_clone_create, pfsync_clone_destroy, 1); 3121 error = swi_add(&V_pfsync_swi_ie, pfsyncname, pfsyncintr, V_pfsyncif, 3122 SWI_NET, INTR_MPSAFE, &V_pfsync_swi_cookie); 3123 if (error) { 3124 if_clone_detach(V_pfsync_cloner); 3125 log(LOG_INFO, "swi_add() failed in %s\n", __func__); 3126 } 3127 3128 pfsync_pointers_init(); 3129 } 3130 VNET_SYSINIT(vnet_pfsync_init, SI_SUB_PROTO_FIREWALL, SI_ORDER_ANY, 3131 vnet_pfsync_init, NULL); 3132 3133 static void 3134 vnet_pfsync_uninit(const void *unused __unused) 3135 { 3136 int ret __diagused; 3137 3138 pfsync_pointers_uninit(); 3139 3140 if_clone_detach(V_pfsync_cloner); 3141 ret = swi_remove(V_pfsync_swi_cookie); 3142 MPASS(ret == 0); 3143 ret = intr_event_destroy(V_pfsync_swi_ie); 3144 MPASS(ret == 0); 3145 } 3146 3147 VNET_SYSUNINIT(vnet_pfsync_uninit, SI_SUB_PROTO_FIREWALL, SI_ORDER_FOURTH, 3148 vnet_pfsync_uninit, NULL); 3149 3150 static int 3151 pfsync_init(void) 3152 { 3153 int error; 3154 3155 pfsync_detach_ifnet_ptr = pfsync_detach_ifnet; 3156 3157 #ifdef INET 3158 error = ipproto_register(IPPROTO_PFSYNC, pfsync_input, NULL); 3159 if (error) 3160 return (error); 3161 #endif 3162 #ifdef INET6 3163 error = ip6proto_register(IPPROTO_PFSYNC, pfsync6_input, NULL); 3164 if (error) { 3165 ipproto_unregister(IPPROTO_PFSYNC); 3166 return (error); 3167 } 3168 #endif 3169 3170 return (0); 3171 } 3172 3173 static void 3174 pfsync_uninit(void) 3175 { 3176 pfsync_detach_ifnet_ptr = NULL; 3177 3178 #ifdef INET 3179 ipproto_unregister(IPPROTO_PFSYNC); 3180 #endif 3181 #ifdef INET6 3182 ip6proto_unregister(IPPROTO_PFSYNC); 3183 #endif 3184 } 3185 3186 static int 3187 pfsync_modevent(module_t mod, int type, void *data) 3188 { 3189 int error = 0; 3190 3191 switch (type) { 3192 case MOD_LOAD: 3193 error = pfsync_init(); 3194 break; 3195 case MOD_UNLOAD: 3196 pfsync_uninit(); 3197 break; 3198 default: 3199 error = EINVAL; 3200 break; 3201 } 3202 3203 return (error); 3204 } 3205 3206 static moduledata_t pfsync_mod = { 3207 pfsyncname, 3208 pfsync_modevent, 3209 0 3210 }; 3211 3212 #define PFSYNC_MODVER 1 3213 3214 /* Stay on FIREWALL as we depend on pf being initialized and on inetdomain. */ 3215 DECLARE_MODULE(pfsync, pfsync_mod, SI_SUB_PROTO_FIREWALL, SI_ORDER_ANY); 3216 MODULE_VERSION(pfsync, PFSYNC_MODVER); 3217 MODULE_DEPEND(pfsync, pf, PF_MODVER, PF_MODVER, PF_MODVER); 3218