| 1 | /* $OpenBSD: if_pfsync.c,v 1.73 2006/11/16 13:13:38 henning Exp $ */ |
| 2 | |
| 3 | /* |
| 4 | * Copyright (c) 2002 Michael Shalayeff |
| 5 | * All rights reserved. |
| 6 | * |
| 7 | * Redistribution and use in source and binary forms, with or without |
| 8 | * modification, are permitted provided that the following conditions |
| 9 | * are met: |
| 10 | * 1. Redistributions of source code must retain the above copyright |
| 11 | * notice, this list of conditions and the following disclaimer. |
| 12 | * 2. Redistributions in binary form must reproduce the above copyright |
| 13 | * notice, this list of conditions and the following disclaimer in the |
| 14 | * documentation and/or other materials provided with the distribution. |
| 15 | * |
| 16 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
| 17 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| 18 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
| 19 | * IN NO EVENT SHALL THE AUTHOR OR HIS RELATIVES BE LIABLE FOR ANY DIRECT, |
| 20 | * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES |
| 21 | * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR |
| 22 | * SERVICES; LOSS OF MIND, USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 23 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, |
| 24 | * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING |
| 25 | * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF |
| 26 | * THE POSSIBILITY OF SUCH DAMAGE. |
| 27 | */ |
| 28 | |
| 29 | #include "opt_inet.h" |
| 30 | #include "opt_inet6.h" |
| 31 | #include "use_carp.h" |
| 32 | |
| 33 | #include <sys/param.h> |
| 34 | #include <sys/endian.h> |
| 35 | #include <sys/proc.h> |
| 36 | #include <sys/priv.h> |
| 37 | #include <sys/systm.h> |
| 38 | #include <sys/time.h> |
| 39 | #include <sys/mbuf.h> |
| 40 | #include <sys/socket.h> |
| 41 | #include <sys/kernel.h> |
| 42 | #include <sys/malloc.h> |
| 43 | #include <sys/module.h> |
| 44 | #include <sys/sockio.h> |
| 45 | #include <sys/thread2.h> |
| 46 | #include <vm/vm_zone.h> |
| 47 | |
| 48 | #include <machine/inttypes.h> |
| 49 | |
| 50 | #include <net/if.h> |
| 51 | #include <net/if_types.h> |
| 52 | #include <net/route.h> |
| 53 | #include <net/bpf.h> |
| 54 | #include <netinet/in.h> |
| 55 | #include <netinet/if_ether.h> |
| 56 | #include <netinet/ip_carp.h> |
| 57 | #include <netinet/tcp.h> |
| 58 | #include <netinet/tcp_seq.h> |
| 59 | |
| 60 | #ifdef INET |
| 61 | #include <netinet/in_systm.h> |
| 62 | #include <netinet/in_var.h> |
| 63 | #include <netinet/ip.h> |
| 64 | #include <netinet/ip_var.h> |
| 65 | #endif |
| 66 | |
| 67 | #ifdef INET6 |
| 68 | #include <netinet6/nd6.h> |
| 69 | #endif /* INET6 */ |
| 70 | |
| 71 | #include <net/pf/pfvar.h> |
| 72 | #include <net/pf/if_pfsync.h> |
| 73 | |
| 74 | #define PFSYNCNAME "pfsync" |
| 75 | |
| 76 | #define PFSYNC_MINMTU \ |
| 77 | (sizeof(struct pfsync_header) + sizeof(struct pf_state)) |
| 78 | |
| 79 | #ifdef PFSYNCDEBUG |
| 80 | #define DPRINTF(x) do { if (pfsyncdebug) kprintf x ; } while (0) |
| 81 | int pfsyncdebug; |
| 82 | #else |
| 83 | #define DPRINTF(x) |
| 84 | #endif |
| 85 | |
| 86 | struct pfsync_softc *pfsyncif = NULL; |
| 87 | struct pfsyncstats pfsyncstats; |
| 88 | |
| 89 | void pfsyncattach(int); |
| 90 | static void pfsync_clone_destroy(struct ifnet *); |
| 91 | static int pfsync_clone_create(struct if_clone *, int, caddr_t); |
| 92 | void pfsync_setmtu(struct pfsync_softc *, int); |
| 93 | int pfsync_alloc_scrub_memory(struct pfsync_state_peer *, |
| 94 | struct pf_state_peer *); |
| 95 | int pfsync_insert_net_state(struct pfsync_state *, u_int8_t); |
| 96 | int pfsyncoutput(struct ifnet *, struct mbuf *, struct sockaddr *, |
| 97 | struct rtentry *); |
| 98 | int pfsyncioctl(struct ifnet *, u_long, caddr_t, struct ucred *); |
| 99 | void pfsyncstart(struct ifnet *); |
| 100 | |
| 101 | struct mbuf *pfsync_get_mbuf(struct pfsync_softc *, u_int8_t, void **); |
| 102 | int pfsync_request_update(struct pfsync_state_upd *, struct in_addr *); |
| 103 | int pfsync_sendout(struct pfsync_softc *); |
| 104 | int pfsync_sendout_mbuf(struct pfsync_softc *, struct mbuf *); |
| 105 | void pfsync_timeout(void *); |
| 106 | void pfsync_send_bus(struct pfsync_softc *, u_int8_t); |
| 107 | void pfsync_bulk_update(void *); |
| 108 | void pfsync_bulkfail(void *); |
| 109 | |
| 110 | static MALLOC_DEFINE(M_PFSYNC, PFSYNCNAME, "Packet Filter State Sync. Interface"); |
| 111 | static LIST_HEAD(pfsync_list, pfsync_softc) pfsync_list; |
| 112 | |
| 113 | int pfsync_sync_ok; |
| 114 | |
| 115 | struct if_clone pfsync_cloner = |
| 116 | IF_CLONE_INITIALIZER("pfsync", pfsync_clone_create, pfsync_clone_destroy, 1 ,1); |
| 117 | |
| 118 | void |
| 119 | pfsyncattach(int npfsync) |
| 120 | { |
| 121 | if_clone_attach(&pfsync_cloner); |
| 122 | } |
| 123 | static int |
| 124 | pfsync_clone_create(struct if_clone *ifc, int unit, caddr_t param __unused) |
| 125 | { |
| 126 | struct pfsync_softc *sc; |
| 127 | struct ifnet *ifp; |
| 128 | |
| 129 | lwkt_gettoken(&pf_token); |
| 130 | |
| 131 | MALLOC(sc, struct pfsync_softc *, sizeof(*sc), M_PFSYNC, |
| 132 | M_WAITOK|M_ZERO); |
| 133 | |
| 134 | pfsync_sync_ok = 1; |
| 135 | sc->sc_mbuf = NULL; |
| 136 | sc->sc_mbuf_net = NULL; |
| 137 | sc->sc_mbuf_tdb = NULL; |
| 138 | sc->sc_statep.s = NULL; |
| 139 | sc->sc_statep_net.s = NULL; |
| 140 | sc->sc_statep_tdb.t = NULL; |
| 141 | sc->sc_maxupdates = 128; |
| 142 | sc->sc_sync_peer.s_addr =htonl(INADDR_PFSYNC_GROUP); |
| 143 | sc->sc_sendaddr.s_addr = htonl(INADDR_PFSYNC_GROUP); |
| 144 | sc->sc_ureq_received = 0; |
| 145 | sc->sc_ureq_sent = 0; |
| 146 | sc->sc_bulk_send_next = NULL; |
| 147 | sc->sc_bulk_terminator = NULL; |
| 148 | |
| 149 | lwkt_reltoken(&pf_token); |
| 150 | ifp = &sc->sc_if; |
| 151 | ksnprintf(ifp->if_xname, sizeof ifp->if_xname, "pfsync%d", unit); |
| 152 | if_initname(ifp, ifc->ifc_name, unit); |
| 153 | ifp->if_ioctl = pfsyncioctl; |
| 154 | ifp->if_output = pfsyncoutput; |
| 155 | ifp->if_start = pfsyncstart; |
| 156 | ifp->if_type = IFT_PFSYNC; |
| 157 | ifp->if_snd.ifq_maxlen = ifqmaxlen; |
| 158 | ifp->if_hdrlen = PFSYNC_HDRLEN; |
| 159 | ifp->if_baudrate = IF_Mbps(100); |
| 160 | ifp->if_softc = sc; |
| 161 | pfsync_setmtu(sc, MCLBYTES); |
| 162 | callout_init(&sc->sc_tmo); |
| 163 | callout_init(&sc->sc_tdb_tmo); |
| 164 | callout_init(&sc->sc_bulk_tmo); |
| 165 | callout_init(&sc->sc_bulkfail_tmo); |
| 166 | if_attach(&sc->sc_if, NULL); |
| 167 | |
| 168 | LIST_INSERT_HEAD(&pfsync_list, sc, sc_next); |
| 169 | bpfattach(&sc->sc_if, DLT_PFSYNC, PFSYNC_HDRLEN); |
| 170 | |
| 171 | #if NCARP > 0 |
| 172 | if_addgroup(ifp, "carp"); |
| 173 | #endif |
| 174 | lwkt_gettoken(&pf_token); |
| 175 | |
| 176 | lwkt_reltoken(&pf_token); |
| 177 | return (0); |
| 178 | } |
| 179 | |
| 180 | static void |
| 181 | pfsync_clone_destroy(struct ifnet *ifp) |
| 182 | { |
| 183 | lwkt_gettoken(&pf_token); |
| 184 | lwkt_reltoken(&pf_token); |
| 185 | #if NBPFILTER > 0 |
| 186 | bpfdetach(ifp); |
| 187 | #endif |
| 188 | if_detach(ifp); |
| 189 | lwkt_gettoken(&pf_token); |
| 190 | kfree(pfsyncif, M_DEVBUF); |
| 191 | pfsyncif = NULL; |
| 192 | } |
| 193 | |
| 194 | /* |
| 195 | * Start output on the pfsync interface. |
| 196 | */ |
| 197 | void |
| 198 | pfsyncstart(struct ifnet *ifp) |
| 199 | { |
| 200 | crit_enter(); |
| 201 | IF_DROP(&ifp->if_snd); |
| 202 | IF_DRAIN(&ifp->if_snd); |
| 203 | crit_exit(); |
| 204 | } |
| 205 | |
| 206 | int |
| 207 | pfsync_alloc_scrub_memory(struct pfsync_state_peer *s, |
| 208 | struct pf_state_peer *d) |
| 209 | { |
| 210 | if (s->scrub.scrub_flag && d->scrub == NULL) { |
| 211 | d->scrub = pool_get(&pf_state_scrub_pl, PR_NOWAIT); |
| 212 | if (d->scrub == NULL) |
| 213 | return (ENOMEM); |
| 214 | bzero(d->scrub, sizeof(*d->scrub)); |
| 215 | } |
| 216 | |
| 217 | return (0); |
| 218 | } |
| 219 | |
| 220 | int |
| 221 | pfsync_insert_net_state(struct pfsync_state *sp, u_int8_t chksum_flag) |
| 222 | { |
| 223 | struct pf_state *st = NULL; |
| 224 | struct pf_state_key *sk = NULL; |
| 225 | struct pf_rule *r = NULL; |
| 226 | struct pfi_kif *kif; |
| 227 | |
| 228 | if (sp->creatorid == 0 && pf_status.debug >= PF_DEBUG_MISC) { |
| 229 | kprintf("pfsync_insert_net_state: invalid creator id:" |
| 230 | " %08x\n", ntohl(sp->creatorid)); |
| 231 | return (EINVAL); |
| 232 | } |
| 233 | |
| 234 | kif = pfi_kif_get(sp->ifname); |
| 235 | if (kif == NULL) { |
| 236 | if (pf_status.debug >= PF_DEBUG_MISC) |
| 237 | kprintf("pfsync_insert_net_state: " |
| 238 | "unknown interface: %s\n", sp->ifname); |
| 239 | /* skip this state */ |
| 240 | return (0); |
| 241 | } |
| 242 | |
| 243 | /* |
| 244 | * If the ruleset checksums match, it's safe to associate the state |
| 245 | * with the rule of that number. |
| 246 | */ |
| 247 | if (sp->rule != htonl(-1) && sp->anchor == htonl(-1) && chksum_flag && |
| 248 | ntohl(sp->rule) < |
| 249 | pf_main_ruleset.rules[PF_RULESET_FILTER].active.rcount) |
| 250 | r = pf_main_ruleset.rules[ |
| 251 | PF_RULESET_FILTER].active.ptr_array[ntohl(sp->rule)]; |
| 252 | else |
| 253 | r = &pf_default_rule; |
| 254 | |
| 255 | if (!r->max_states || r->states < r->max_states) |
| 256 | st = pool_get(&pf_state_pl, PR_NOWAIT); |
| 257 | if (st == NULL) { |
| 258 | pfi_kif_unref(kif, PFI_KIF_REF_NONE); |
| 259 | return (ENOMEM); |
| 260 | } |
| 261 | bzero(st, sizeof(*st)); |
| 262 | |
| 263 | if ((sk = pf_alloc_state_key(st)) == NULL) { |
| 264 | pool_put(&pf_state_pl, st); |
| 265 | pfi_kif_unref(kif, PFI_KIF_REF_NONE); |
| 266 | return (ENOMEM); |
| 267 | } |
| 268 | |
| 269 | /* allocate memory for scrub info */ |
| 270 | if (pfsync_alloc_scrub_memory(&sp->src, &st->src) || |
| 271 | pfsync_alloc_scrub_memory(&sp->dst, &st->dst)) { |
| 272 | pfi_kif_unref(kif, PFI_KIF_REF_NONE); |
| 273 | if (st->src.scrub) |
| 274 | pool_put(&pf_state_scrub_pl, st->src.scrub); |
| 275 | pool_put(&pf_state_pl, st); |
| 276 | pool_put(&pf_state_key_pl, sk); |
| 277 | return (ENOMEM); |
| 278 | } |
| 279 | |
| 280 | st->rule.ptr = r; |
| 281 | /* XXX get pointers to nat_rule and anchor */ |
| 282 | |
| 283 | /* XXX when we have nat_rule/anchors, use STATE_INC_COUNTERS */ |
| 284 | r->states++; |
| 285 | |
| 286 | /* fill in the rest of the state entry */ |
| 287 | pf_state_host_ntoh(&sp->lan, &sk->lan); |
| 288 | pf_state_host_ntoh(&sp->gwy, &sk->gwy); |
| 289 | pf_state_host_ntoh(&sp->ext, &sk->ext); |
| 290 | |
| 291 | pf_state_peer_ntoh(&sp->src, &st->src); |
| 292 | pf_state_peer_ntoh(&sp->dst, &st->dst); |
| 293 | |
| 294 | bcopy(&sp->rt_addr, &st->rt_addr, sizeof(st->rt_addr)); |
| 295 | st->creation = time_second - ntohl(sp->creation); |
| 296 | st->expire = ntohl(sp->expire) + time_second; |
| 297 | |
| 298 | sk->af = sp->af; |
| 299 | sk->proto = sp->proto; |
| 300 | sk->direction = sp->direction; |
| 301 | st->log = sp->log; |
| 302 | st->timeout = sp->timeout; |
| 303 | st->allow_opts = sp->allow_opts; |
| 304 | |
| 305 | bcopy(sp->id, &st->id, sizeof(st->id)); |
| 306 | st->creatorid = sp->creatorid; |
| 307 | st->sync_flags = PFSTATE_FROMSYNC; |
| 308 | |
| 309 | if (pf_insert_state(kif, st)) { |
| 310 | pfi_kif_unref(kif, PFI_KIF_REF_NONE); |
| 311 | /* XXX when we have nat_rule/anchors, use STATE_DEC_COUNTERS */ |
| 312 | r->states--; |
| 313 | if (st->dst.scrub) |
| 314 | pool_put(&pf_state_scrub_pl, st->dst.scrub); |
| 315 | if (st->src.scrub) |
| 316 | pool_put(&pf_state_scrub_pl, st->src.scrub); |
| 317 | pool_put(&pf_state_pl, st); |
| 318 | return (EINVAL); |
| 319 | } |
| 320 | |
| 321 | return (0); |
| 322 | } |
| 323 | |
| 324 | void |
| 325 | pfsync_input(struct mbuf *m, ...) |
| 326 | { |
| 327 | struct ip *ip = mtod(m, struct ip *); |
| 328 | struct pfsync_header *ph; |
| 329 | struct pfsync_softc *sc = pfsyncif; |
| 330 | struct pf_state *st; |
| 331 | struct pf_state_key *sk; |
| 332 | struct pf_state_cmp id_key; |
| 333 | struct pfsync_state *sp; |
| 334 | struct pfsync_state_upd *up; |
| 335 | struct pfsync_state_del *dp; |
| 336 | struct pfsync_state_clr *cp; |
| 337 | struct pfsync_state_upd_req *rup; |
| 338 | struct pfsync_state_bus *bus; |
| 339 | #ifdef IPSEC |
| 340 | struct pfsync_tdb *pt; |
| 341 | #endif |
| 342 | struct in_addr src; |
| 343 | struct mbuf *mp; |
| 344 | int iplen, action, error, i, count, offp, sfail, stale = 0; |
| 345 | u_int8_t chksum_flag = 0; |
| 346 | |
| 347 | /* This function is not yet called from anywhere */ |
| 348 | /* Still we assume for safety that pf_token must be held */ |
| 349 | ASSERT_LWKT_TOKEN_HELD(&pf_token); |
| 350 | |
| 351 | pfsyncstats.pfsyncs_ipackets++; |
| 352 | |
| 353 | /* verify that we have a sync interface configured */ |
| 354 | if (!sc || !sc->sc_sync_ifp || !pf_status.running) |
| 355 | goto done; |
| 356 | |
| 357 | /* verify that the packet came in on the right interface */ |
| 358 | if (sc->sc_sync_ifp != m->m_pkthdr.rcvif) { |
| 359 | pfsyncstats.pfsyncs_badif++; |
| 360 | goto done; |
| 361 | } |
| 362 | |
| 363 | /* verify that the IP TTL is 255. */ |
| 364 | if (ip->ip_ttl != PFSYNC_DFLTTL) { |
| 365 | pfsyncstats.pfsyncs_badttl++; |
| 366 | goto done; |
| 367 | } |
| 368 | |
| 369 | iplen = ip->ip_hl << 2; |
| 370 | |
| 371 | if (m->m_pkthdr.len < iplen + sizeof(*ph)) { |
| 372 | pfsyncstats.pfsyncs_hdrops++; |
| 373 | goto done; |
| 374 | } |
| 375 | |
| 376 | if (iplen + sizeof(*ph) > m->m_len) { |
| 377 | if ((m = m_pullup(m, iplen + sizeof(*ph))) == NULL) { |
| 378 | pfsyncstats.pfsyncs_hdrops++; |
| 379 | goto done; |
| 380 | } |
| 381 | ip = mtod(m, struct ip *); |
| 382 | } |
| 383 | ph = (struct pfsync_header *)((char *)ip + iplen); |
| 384 | |
| 385 | /* verify the version */ |
| 386 | if (ph->version != PFSYNC_VERSION) { |
| 387 | pfsyncstats.pfsyncs_badver++; |
| 388 | goto done; |
| 389 | } |
| 390 | |
| 391 | action = ph->action; |
| 392 | count = ph->count; |
| 393 | |
| 394 | /* make sure it's a valid action code */ |
| 395 | if (action >= PFSYNC_ACT_MAX) { |
| 396 | pfsyncstats.pfsyncs_badact++; |
| 397 | goto done; |
| 398 | } |
| 399 | |
| 400 | /* Cheaper to grab this now than having to mess with mbufs later */ |
| 401 | src = ip->ip_src; |
| 402 | |
| 403 | if (!bcmp(&ph->pf_chksum, &pf_status.pf_chksum, PF_MD5_DIGEST_LENGTH)) |
| 404 | chksum_flag++; |
| 405 | |
| 406 | switch (action) { |
| 407 | case PFSYNC_ACT_CLR: { |
| 408 | struct pf_state *nexts; |
| 409 | struct pf_state_key *nextsk; |
| 410 | struct pfi_kif *kif; |
| 411 | u_int32_t creatorid; |
| 412 | if ((mp = m_pulldown(m, iplen + sizeof(*ph), |
| 413 | sizeof(*cp), &offp)) == NULL) { |
| 414 | pfsyncstats.pfsyncs_badlen++; |
| 415 | return; |
| 416 | } |
| 417 | cp = (struct pfsync_state_clr *)(mp->m_data + offp); |
| 418 | creatorid = cp->creatorid; |
| 419 | |
| 420 | crit_enter(); |
| 421 | if (cp->ifname[0] == '\0') { |
| 422 | for (st = RB_MIN(pf_state_tree_id, &tree_id); |
| 423 | st; st = nexts) { |
| 424 | nexts = RB_NEXT(pf_state_tree_id, &tree_id, st); |
| 425 | if (st->creatorid == creatorid) { |
| 426 | st->sync_flags |= PFSTATE_FROMSYNC; |
| 427 | pf_unlink_state(st); |
| 428 | } |
| 429 | } |
| 430 | } else { |
| 431 | if ((kif = pfi_kif_get(cp->ifname)) == NULL) { |
| 432 | crit_exit(); |
| 433 | return; |
| 434 | } |
| 435 | for (sk = RB_MIN(pf_state_tree_lan_ext, |
| 436 | &pf_statetbl_lan_ext); sk; sk = nextsk) { |
| 437 | nextsk = RB_NEXT(pf_state_tree_lan_ext, |
| 438 | &pf_statetbl_lan_ext, sk); |
| 439 | TAILQ_FOREACH(st, &sk->states, next) { |
| 440 | if (st->creatorid == creatorid) { |
| 441 | st->sync_flags |= |
| 442 | PFSTATE_FROMSYNC; |
| 443 | pf_unlink_state(st); |
| 444 | } |
| 445 | } |
| 446 | } |
| 447 | } |
| 448 | crit_exit(); |
| 449 | |
| 450 | break; |
| 451 | } |
| 452 | case PFSYNC_ACT_INS: |
| 453 | if ((mp = m_pulldown(m, iplen + sizeof(*ph), |
| 454 | count * sizeof(*sp), &offp)) == NULL) { |
| 455 | pfsyncstats.pfsyncs_badlen++; |
| 456 | return; |
| 457 | } |
| 458 | |
| 459 | crit_enter(); |
| 460 | for (i = 0, sp = (struct pfsync_state *)(mp->m_data + offp); |
| 461 | i < count; i++, sp++) { |
| 462 | /* check for invalid values */ |
| 463 | if (sp->timeout >= PFTM_MAX || |
| 464 | sp->src.state > PF_TCPS_PROXY_DST || |
| 465 | sp->dst.state > PF_TCPS_PROXY_DST || |
| 466 | sp->direction > PF_OUT || |
| 467 | (sp->af != AF_INET && sp->af != AF_INET6)) { |
| 468 | if (pf_status.debug >= PF_DEBUG_MISC) |
| 469 | kprintf("pfsync_insert: PFSYNC_ACT_INS: " |
| 470 | "invalid value\n"); |
| 471 | pfsyncstats.pfsyncs_badstate++; |
| 472 | continue; |
| 473 | } |
| 474 | |
| 475 | if ((error = pfsync_insert_net_state(sp, |
| 476 | chksum_flag))) { |
| 477 | if (error == ENOMEM) { |
| 478 | crit_exit(); |
| 479 | goto done; |
| 480 | } |
| 481 | continue; |
| 482 | } |
| 483 | } |
| 484 | crit_exit(); |
| 485 | break; |
| 486 | case PFSYNC_ACT_UPD: |
| 487 | if ((mp = m_pulldown(m, iplen + sizeof(*ph), |
| 488 | count * sizeof(*sp), &offp)) == NULL) { |
| 489 | pfsyncstats.pfsyncs_badlen++; |
| 490 | return; |
| 491 | } |
| 492 | |
| 493 | crit_enter(); |
| 494 | for (i = 0, sp = (struct pfsync_state *)(mp->m_data + offp); |
| 495 | i < count; i++, sp++) { |
| 496 | int flags = PFSYNC_FLAG_STALE; |
| 497 | |
| 498 | /* check for invalid values */ |
| 499 | if (sp->timeout >= PFTM_MAX || |
| 500 | sp->src.state > PF_TCPS_PROXY_DST || |
| 501 | sp->dst.state > PF_TCPS_PROXY_DST) { |
| 502 | if (pf_status.debug >= PF_DEBUG_MISC) |
| 503 | kprintf("pfsync_insert: PFSYNC_ACT_UPD: " |
| 504 | "invalid value\n"); |
| 505 | pfsyncstats.pfsyncs_badstate++; |
| 506 | continue; |
| 507 | } |
| 508 | |
| 509 | bcopy(sp->id, &id_key.id, sizeof(id_key.id)); |
| 510 | id_key.creatorid = sp->creatorid; |
| 511 | |
| 512 | st = pf_find_state_byid(&id_key); |
| 513 | if (st == NULL) { |
| 514 | /* insert the update */ |
| 515 | if (pfsync_insert_net_state(sp, chksum_flag)) |
| 516 | pfsyncstats.pfsyncs_badstate++; |
| 517 | continue; |
| 518 | } |
| 519 | sk = st->state_key; |
| 520 | sfail = 0; |
| 521 | if (sk->proto == IPPROTO_TCP) { |
| 522 | /* |
| 523 | * The state should never go backwards except |
| 524 | * for syn-proxy states. Neither should the |
| 525 | * sequence window slide backwards. |
| 526 | */ |
| 527 | if (st->src.state > sp->src.state && |
| 528 | (st->src.state < PF_TCPS_PROXY_SRC || |
| 529 | sp->src.state >= PF_TCPS_PROXY_SRC)) |
| 530 | sfail = 1; |
| 531 | else if (SEQ_GT(st->src.seqlo, |
| 532 | ntohl(sp->src.seqlo))) |
| 533 | sfail = 3; |
| 534 | else if (st->dst.state > sp->dst.state) { |
| 535 | /* There might still be useful |
| 536 | * information about the src state here, |
| 537 | * so import that part of the update, |
| 538 | * then "fail" so we send the updated |
| 539 | * state back to the peer who is missing |
| 540 | * our what we know. */ |
| 541 | pf_state_peer_ntoh(&sp->src, &st->src); |
| 542 | /* XXX do anything with timeouts? */ |
| 543 | sfail = 7; |
| 544 | flags = 0; |
| 545 | } else if (st->dst.state >= TCPS_SYN_SENT && |
| 546 | SEQ_GT(st->dst.seqlo, ntohl(sp->dst.seqlo))) |
| 547 | sfail = 4; |
| 548 | } else { |
| 549 | /* |
| 550 | * Non-TCP protocol state machine always go |
| 551 | * forwards |
| 552 | */ |
| 553 | if (st->src.state > sp->src.state) |
| 554 | sfail = 5; |
| 555 | else if (st->dst.state > sp->dst.state) |
| 556 | sfail = 6; |
| 557 | } |
| 558 | if (sfail) { |
| 559 | if (pf_status.debug >= PF_DEBUG_MISC) |
| 560 | kprintf("pfsync: %s stale update " |
| 561 | "(%d) id: %016jx " |
| 562 | "creatorid: %08x\n", |
| 563 | (sfail < 7 ? "ignoring" |
| 564 | : "partial"), sfail, |
| 565 | (uintmax_t)be64toh(st->id), |
| 566 | ntohl(st->creatorid)); |
| 567 | pfsyncstats.pfsyncs_badstate++; |
| 568 | |
| 569 | if (!(sp->sync_flags & PFSTATE_STALE)) { |
| 570 | /* we have a better state, send it */ |
| 571 | if (sc->sc_mbuf != NULL && !stale) |
| 572 | pfsync_sendout(sc); |
| 573 | stale++; |
| 574 | if (!st->sync_flags) |
| 575 | pfsync_pack_state( |
| 576 | PFSYNC_ACT_UPD, st, flags); |
| 577 | } |
| 578 | continue; |
| 579 | } |
| 580 | pfsync_alloc_scrub_memory(&sp->dst, &st->dst); |
| 581 | pf_state_peer_ntoh(&sp->src, &st->src); |
| 582 | pf_state_peer_ntoh(&sp->dst, &st->dst); |
| 583 | st->expire = ntohl(sp->expire) + time_second; |
| 584 | st->timeout = sp->timeout; |
| 585 | } |
| 586 | if (stale && sc->sc_mbuf != NULL) |
| 587 | pfsync_sendout(sc); |
| 588 | crit_exit(); |
| 589 | break; |
| 590 | /* |
| 591 | * It's not strictly necessary for us to support the "uncompressed" |
| 592 | * delete action, but it's relatively simple and maintains consistency. |
| 593 | */ |
| 594 | case PFSYNC_ACT_DEL: |
| 595 | if ((mp = m_pulldown(m, iplen + sizeof(*ph), |
| 596 | count * sizeof(*sp), &offp)) == NULL) { |
| 597 | pfsyncstats.pfsyncs_badlen++; |
| 598 | return; |
| 599 | } |
| 600 | |
| 601 | crit_enter(); |
| 602 | for (i = 0, sp = (struct pfsync_state *)(mp->m_data + offp); |
| 603 | i < count; i++, sp++) { |
| 604 | bcopy(sp->id, &id_key.id, sizeof(id_key.id)); |
| 605 | id_key.creatorid = sp->creatorid; |
| 606 | |
| 607 | st = pf_find_state_byid(&id_key); |
| 608 | if (st == NULL) { |
| 609 | pfsyncstats.pfsyncs_badstate++; |
| 610 | continue; |
| 611 | } |
| 612 | st->sync_flags |= PFSTATE_FROMSYNC; |
| 613 | pf_unlink_state(st); |
| 614 | } |
| 615 | crit_exit(); |
| 616 | break; |
| 617 | case PFSYNC_ACT_UPD_C: { |
| 618 | int update_requested = 0; |
| 619 | |
| 620 | if ((mp = m_pulldown(m, iplen + sizeof(*ph), |
| 621 | count * sizeof(*up), &offp)) == NULL) { |
| 622 | pfsyncstats.pfsyncs_badlen++; |
| 623 | return; |
| 624 | } |
| 625 | |
| 626 | crit_enter(); |
| 627 | for (i = 0, up = (struct pfsync_state_upd *)(mp->m_data + offp); |
| 628 | i < count; i++, up++) { |
| 629 | /* check for invalid values */ |
| 630 | if (up->timeout >= PFTM_MAX || |
| 631 | up->src.state > PF_TCPS_PROXY_DST || |
| 632 | up->dst.state > PF_TCPS_PROXY_DST) { |
| 633 | if (pf_status.debug >= PF_DEBUG_MISC) |
| 634 | kprintf("pfsync_insert: " |
| 635 | "PFSYNC_ACT_UPD_C: " |
| 636 | "invalid value\n"); |
| 637 | pfsyncstats.pfsyncs_badstate++; |
| 638 | continue; |
| 639 | } |
| 640 | |
| 641 | bcopy(up->id, &id_key.id, sizeof(id_key.id)); |
| 642 | id_key.creatorid = up->creatorid; |
| 643 | |
| 644 | st = pf_find_state_byid(&id_key); |
| 645 | if (st == NULL) { |
| 646 | /* We don't have this state. Ask for it. */ |
| 647 | error = pfsync_request_update(up, &src); |
| 648 | if (error == ENOMEM) { |
| 649 | crit_exit(); |
| 650 | goto done; |
| 651 | } |
| 652 | update_requested = 1; |
| 653 | pfsyncstats.pfsyncs_badstate++; |
| 654 | continue; |
| 655 | } |
| 656 | sk = st->state_key; |
| 657 | sfail = 0; |
| 658 | if (sk->proto == IPPROTO_TCP) { |
| 659 | /* |
| 660 | * The state should never go backwards except |
| 661 | * for syn-proxy states. Neither should the |
| 662 | * sequence window slide backwards. |
| 663 | */ |
| 664 | if (st->src.state > up->src.state && |
| 665 | (st->src.state < PF_TCPS_PROXY_SRC || |
| 666 | up->src.state >= PF_TCPS_PROXY_SRC)) |
| 667 | sfail = 1; |
| 668 | else if (st->dst.state > up->dst.state) |
| 669 | sfail = 2; |
| 670 | else if (SEQ_GT(st->src.seqlo, |
| 671 | ntohl(up->src.seqlo))) |
| 672 | sfail = 3; |
| 673 | else if (st->dst.state >= TCPS_SYN_SENT && |
| 674 | SEQ_GT(st->dst.seqlo, ntohl(up->dst.seqlo))) |
| 675 | sfail = 4; |
| 676 | } else { |
| 677 | /* |
| 678 | * Non-TCP protocol state machine always go |
| 679 | * forwards |
| 680 | */ |
| 681 | if (st->src.state > up->src.state) |
| 682 | sfail = 5; |
| 683 | else if (st->dst.state > up->dst.state) |
| 684 | sfail = 6; |
| 685 | } |
| 686 | if (sfail) { |
| 687 | if (pf_status.debug >= PF_DEBUG_MISC) |
| 688 | kprintf("pfsync: ignoring stale update " |
| 689 | "(%d) id: %016llx " |
| 690 | "creatorid: %08x\n", sfail, |
| 691 | be64toh(st->id), |
| 692 | ntohl(st->creatorid)); |
| 693 | pfsyncstats.pfsyncs_badstate++; |
| 694 | |
| 695 | /* we have a better state, send it out */ |
| 696 | if ((!stale || update_requested) && |
| 697 | sc->sc_mbuf != NULL) { |
| 698 | pfsync_sendout(sc); |
| 699 | update_requested = 0; |
| 700 | } |
| 701 | stale++; |
| 702 | if (!st->sync_flags) |
| 703 | pfsync_pack_state(PFSYNC_ACT_UPD, st, |
| 704 | PFSYNC_FLAG_STALE); |
| 705 | continue; |
| 706 | } |
| 707 | pfsync_alloc_scrub_memory(&up->dst, &st->dst); |
| 708 | pf_state_peer_ntoh(&up->src, &st->src); |
| 709 | pf_state_peer_ntoh(&up->dst, &st->dst); |
| 710 | st->expire = ntohl(up->expire) + time_second; |
| 711 | st->timeout = up->timeout; |
| 712 | } |
| 713 | if ((update_requested || stale) && sc->sc_mbuf) |
| 714 | pfsync_sendout(sc); |
| 715 | crit_exit(); |
| 716 | break; |
| 717 | } |
| 718 | case PFSYNC_ACT_DEL_C: |
| 719 | if ((mp = m_pulldown(m, iplen + sizeof(*ph), |
| 720 | count * sizeof(*dp), &offp)) == NULL) { |
| 721 | pfsyncstats.pfsyncs_badlen++; |
| 722 | return; |
| 723 | } |
| 724 | |
| 725 | crit_enter(); |
| 726 | for (i = 0, dp = (struct pfsync_state_del *)(mp->m_data + offp); |
| 727 | i < count; i++, dp++) { |
| 728 | bcopy(dp->id, &id_key.id, sizeof(id_key.id)); |
| 729 | id_key.creatorid = dp->creatorid; |
| 730 | |
| 731 | st = pf_find_state_byid(&id_key); |
| 732 | if (st == NULL) { |
| 733 | pfsyncstats.pfsyncs_badstate++; |
| 734 | continue; |
| 735 | } |
| 736 | st->sync_flags |= PFSTATE_FROMSYNC; |
| 737 | pf_unlink_state(st); |
| 738 | } |
| 739 | crit_exit(); |
| 740 | break; |
| 741 | case PFSYNC_ACT_INS_F: |
| 742 | case PFSYNC_ACT_DEL_F: |
| 743 | /* not implemented */ |
| 744 | break; |
| 745 | case PFSYNC_ACT_UREQ: |
| 746 | if ((mp = m_pulldown(m, iplen + sizeof(*ph), |
| 747 | count * sizeof(*rup), &offp)) == NULL) { |
| 748 | pfsyncstats.pfsyncs_badlen++; |
| 749 | return; |
| 750 | } |
| 751 | |
| 752 | crit_enter(); |
| 753 | if (sc->sc_mbuf != NULL) |
| 754 | pfsync_sendout(sc); |
| 755 | for (i = 0, |
| 756 | rup = (struct pfsync_state_upd_req *)(mp->m_data + offp); |
| 757 | i < count; i++, rup++) { |
| 758 | bcopy(rup->id, &id_key.id, sizeof(id_key.id)); |
| 759 | id_key.creatorid = rup->creatorid; |
| 760 | |
| 761 | if (id_key.id == 0 && id_key.creatorid == 0) { |
| 762 | sc->sc_ureq_received = mycpu->gd_time_seconds; |
| 763 | if (sc->sc_bulk_send_next == NULL) |
| 764 | sc->sc_bulk_send_next = |
| 765 | TAILQ_FIRST(&state_list); |
| 766 | sc->sc_bulk_terminator = sc->sc_bulk_send_next; |
| 767 | if (pf_status.debug >= PF_DEBUG_MISC) |
| 768 | kprintf("pfsync: received " |
| 769 | "bulk update request\n"); |
| 770 | pfsync_send_bus(sc, PFSYNC_BUS_START); |
| 771 | lwkt_reltoken(&pf_token); |
| 772 | callout_reset(&sc->sc_bulk_tmo, 1 * hz, |
| 773 | pfsync_bulk_update, |
| 774 | LIST_FIRST(&pfsync_list)); |
| 775 | lwkt_gettoken(&pf_token); |
| 776 | } else { |
| 777 | st = pf_find_state_byid(&id_key); |
| 778 | if (st == NULL) { |
| 779 | pfsyncstats.pfsyncs_badstate++; |
| 780 | continue; |
| 781 | } |
| 782 | if (!st->sync_flags) |
| 783 | pfsync_pack_state(PFSYNC_ACT_UPD, |
| 784 | st, 0); |
| 785 | } |
| 786 | } |
| 787 | if (sc->sc_mbuf != NULL) |
| 788 | pfsync_sendout(sc); |
| 789 | crit_exit(); |
| 790 | break; |
| 791 | case PFSYNC_ACT_BUS: |
| 792 | /* If we're not waiting for a bulk update, who cares. */ |
| 793 | if (sc->sc_ureq_sent == 0) |
| 794 | break; |
| 795 | |
| 796 | if ((mp = m_pulldown(m, iplen + sizeof(*ph), |
| 797 | sizeof(*bus), &offp)) == NULL) { |
| 798 | pfsyncstats.pfsyncs_badlen++; |
| 799 | return; |
| 800 | } |
| 801 | bus = (struct pfsync_state_bus *)(mp->m_data + offp); |
| 802 | switch (bus->status) { |
| 803 | case PFSYNC_BUS_START: |
| 804 | lwkt_reltoken(&pf_token); |
| 805 | callout_reset(&sc->sc_bulkfail_tmo, |
| 806 | pf_pool_limits[PF_LIMIT_STATES].limit / |
| 807 | (PFSYNC_BULKPACKETS * sc->sc_maxcount), |
| 808 | pfsync_bulkfail, LIST_FIRST(&pfsync_list)); |
| 809 | lwkt_gettoken(&pf_token); |
| 810 | if (pf_status.debug >= PF_DEBUG_MISC) |
| 811 | kprintf("pfsync: received bulk " |
| 812 | "update start\n"); |
| 813 | break; |
| 814 | case PFSYNC_BUS_END: |
| 815 | if (mycpu->gd_time_seconds - ntohl(bus->endtime) >= |
| 816 | sc->sc_ureq_sent) { |
| 817 | /* that's it, we're happy */ |
| 818 | sc->sc_ureq_sent = 0; |
| 819 | sc->sc_bulk_tries = 0; |
| 820 | lwkt_reltoken(&pf_token); |
| 821 | callout_stop(&sc->sc_bulkfail_tmo); |
| 822 | lwkt_gettoken(&pf_token); |
| 823 | #if NCARP > 0 |
| 824 | if (!pfsync_sync_ok) { |
| 825 | lwkt_reltoken(&pf_token); |
| 826 | carp_group_demote_adj(&sc->sc_if, -1); |
| 827 | lwkt_gettoken(&pf_token); |
| 828 | } |
| 829 | #endif |
| 830 | pfsync_sync_ok = 1; |
| 831 | if (pf_status.debug >= PF_DEBUG_MISC) |
| 832 | kprintf("pfsync: received valid " |
| 833 | "bulk update end\n"); |
| 834 | } else { |
| 835 | if (pf_status.debug >= PF_DEBUG_MISC) |
| 836 | kprintf("pfsync: received invalid " |
| 837 | "bulk update end: bad timestamp\n"); |
| 838 | } |
| 839 | break; |
| 840 | } |
| 841 | break; |
| 842 | #ifdef IPSEC |
| 843 | case PFSYNC_ACT_TDB_UPD: |
| 844 | if ((mp = m_pulldown(m, iplen + sizeof(*ph), |
| 845 | count * sizeof(*pt), &offp)) == NULL) { |
| 846 | pfsyncstats.pfsyncs_badlen++; |
| 847 | return; |
| 848 | } |
| 849 | crit_enter(); |
| 850 | for (i = 0, pt = (struct pfsync_tdb *)(mp->m_data + offp); |
| 851 | i < count; i++, pt++) |
| 852 | pfsync_update_net_tdb(pt); |
| 853 | crit_exit(); |
| 854 | break; |
| 855 | #endif |
| 856 | } |
| 857 | |
| 858 | done: |
| 859 | if (m) |
| 860 | m_freem(m); |
| 861 | } |
| 862 | |
| 863 | int |
| 864 | pfsyncoutput(struct ifnet *ifp, struct mbuf *m, struct sockaddr *dst, |
| 865 | struct rtentry *rt) |
| 866 | { |
| 867 | m_freem(m); |
| 868 | return (0); |
| 869 | } |
| 870 | |
| 871 | /* ARGSUSED */ |
| 872 | int |
| 873 | pfsyncioctl(struct ifnet *ifp, u_long cmd, caddr_t data, struct ucred *cr) |
| 874 | { |
| 875 | struct pfsync_softc *sc = ifp->if_softc; |
| 876 | struct ifreq *ifr = (struct ifreq *)data; |
| 877 | struct ip_moptions *imo = &sc->sc_imo; |
| 878 | struct pfsyncreq pfsyncr; |
| 879 | struct ifnet *sifp; |
| 880 | int error; |
| 881 | |
| 882 | lwkt_gettoken(&pf_token); |
| 883 | |
| 884 | switch (cmd) { |
| 885 | case SIOCSIFADDR: |
| 886 | case SIOCAIFADDR: |
| 887 | case SIOCSIFDSTADDR: |
| 888 | case SIOCSIFFLAGS: |
| 889 | if (ifp->if_flags & IFF_UP) |
| 890 | ifp->if_flags |= IFF_RUNNING; |
| 891 | else |
| 892 | ifp->if_flags &= ~IFF_RUNNING; |
| 893 | break; |
| 894 | case SIOCSIFMTU: |
| 895 | if (ifr->ifr_mtu < PFSYNC_MINMTU) { |
| 896 | lwkt_reltoken(&pf_token); |
| 897 | return (EINVAL); |
| 898 | } |
| 899 | if (ifr->ifr_mtu > MCLBYTES) |
| 900 | ifr->ifr_mtu = MCLBYTES; |
| 901 | crit_enter(); |
| 902 | if (ifr->ifr_mtu < ifp->if_mtu) |
| 903 | pfsync_sendout(sc); |
| 904 | pfsync_setmtu(sc, ifr->ifr_mtu); |
| 905 | crit_exit(); |
| 906 | break; |
| 907 | case SIOCGETPFSYNC: |
| 908 | bzero(&pfsyncr, sizeof(pfsyncr)); |
| 909 | if (sc->sc_sync_ifp) |
| 910 | strlcpy(pfsyncr.pfsyncr_syncdev, |
| 911 | sc->sc_sync_ifp->if_xname, IFNAMSIZ); |
| 912 | pfsyncr.pfsyncr_syncpeer = sc->sc_sync_peer; |
| 913 | pfsyncr.pfsyncr_maxupdates = sc->sc_maxupdates; |
| 914 | lwkt_reltoken(&pf_token); |
| 915 | if ((error = copyout(&pfsyncr, ifr->ifr_data, sizeof(pfsyncr)))) |
| 916 | return (error); |
| 917 | lwkt_gettoken(&pf_token); |
| 918 | break; |
| 919 | case SIOCSETPFSYNC: |
| 920 | if ((error = priv_check_cred(cr, PRIV_ROOT, NULL_CRED_OKAY)) != 0) { |
| 921 | lwkt_reltoken(&pf_token); |
| 922 | return (error); |
| 923 | } |
| 924 | if ((error = copyin(ifr->ifr_data, &pfsyncr, sizeof(pfsyncr)))) { |
| 925 | lwkt_reltoken(&pf_token); |
| 926 | return (error); |
| 927 | } |
| 928 | |
| 929 | if (pfsyncr.pfsyncr_syncpeer.s_addr == 0) |
| 930 | sc->sc_sync_peer.s_addr = INADDR_PFSYNC_GROUP; |
| 931 | else |
| 932 | sc->sc_sync_peer.s_addr = |
| 933 | pfsyncr.pfsyncr_syncpeer.s_addr; |
| 934 | |
| 935 | if (pfsyncr.pfsyncr_maxupdates > 255) { |
| 936 | lwkt_reltoken(&pf_token); |
| 937 | return (EINVAL); |
| 938 | } |
| 939 | sc->sc_maxupdates = pfsyncr.pfsyncr_maxupdates; |
| 940 | |
| 941 | if (pfsyncr.pfsyncr_syncdev[0] == 0) { |
| 942 | sc->sc_sync_ifp = NULL; |
| 943 | if (sc->sc_mbuf_net != NULL) { |
| 944 | /* Don't keep stale pfsync packets around. */ |
| 945 | crit_enter(); |
| 946 | m_freem(sc->sc_mbuf_net); |
| 947 | sc->sc_mbuf_net = NULL; |
| 948 | sc->sc_statep_net.s = NULL; |
| 949 | crit_exit(); |
| 950 | } |
| 951 | if (imo->imo_num_memberships > 0) { |
| 952 | in_delmulti(imo->imo_membership[--imo->imo_num_memberships]); |
| 953 | imo->imo_multicast_ifp = NULL; |
| 954 | } |
| 955 | break; |
| 956 | } |
| 957 | |
| 958 | if ((sifp = ifunit(pfsyncr.pfsyncr_syncdev)) == NULL) { |
| 959 | lwkt_reltoken(&pf_token); |
| 960 | return (EINVAL); |
| 961 | } |
| 962 | |
| 963 | crit_enter(); |
| 964 | if (sifp->if_mtu < sc->sc_if.if_mtu || |
| 965 | (sc->sc_sync_ifp != NULL && |
| 966 | sifp->if_mtu < sc->sc_sync_ifp->if_mtu) || |
| 967 | sifp->if_mtu < MCLBYTES - sizeof(struct ip)) |
| 968 | pfsync_sendout(sc); |
| 969 | sc->sc_sync_ifp = sifp; |
| 970 | |
| 971 | pfsync_setmtu(sc, sc->sc_if.if_mtu); |
| 972 | |
| 973 | if (imo->imo_num_memberships > 0) { |
| 974 | in_delmulti(imo->imo_membership[--imo->imo_num_memberships]); |
| 975 | imo->imo_multicast_ifp = NULL; |
| 976 | } |
| 977 | |
| 978 | if (sc->sc_sync_ifp && |
| 979 | sc->sc_sync_peer.s_addr == INADDR_PFSYNC_GROUP) { |
| 980 | struct in_addr addr; |
| 981 | |
| 982 | if (!(sc->sc_sync_ifp->if_flags & IFF_MULTICAST)) { |
| 983 | sc->sc_sync_ifp = NULL; |
| 984 | lwkt_reltoken(&pf_token); |
| 985 | crit_exit(); |
| 986 | return (EADDRNOTAVAIL); |
| 987 | } |
| 988 | |
| 989 | addr.s_addr = INADDR_PFSYNC_GROUP; |
| 990 | |
| 991 | if ((imo->imo_membership[0] = |
| 992 | in_addmulti(&addr, sc->sc_sync_ifp)) == NULL) { |
| 993 | sc->sc_sync_ifp = NULL; |
| 994 | lwkt_reltoken(&pf_token); |
| 995 | crit_exit(); |
| 996 | return (ENOBUFS); |
| 997 | } |
| 998 | imo->imo_num_memberships++; |
| 999 | imo->imo_multicast_ifp = sc->sc_sync_ifp; |
| 1000 | imo->imo_multicast_ttl = PFSYNC_DFLTTL; |
| 1001 | imo->imo_multicast_loop = 0; |
| 1002 | } |
| 1003 | |
| 1004 | if (sc->sc_sync_ifp || |
| 1005 | sc->sc_sendaddr.s_addr != INADDR_PFSYNC_GROUP) { |
| 1006 | /* Request a full state table update. */ |
| 1007 | sc->sc_ureq_sent = mycpu->gd_time_seconds; |
| 1008 | #if NCARP > 0 |
| 1009 | if (pfsync_sync_ok) |
| 1010 | carp_group_demote_adj(&sc->sc_if, 1); |
| 1011 | #endif |
| 1012 | pfsync_sync_ok = 0; |
| 1013 | if (pf_status.debug >= PF_DEBUG_MISC) |
| 1014 | kprintf("pfsync: requesting bulk update\n"); |
| 1015 | lwkt_reltoken(&pf_token); |
| 1016 | callout_reset(&sc->sc_bulkfail_tmo, 5 * hz, |
| 1017 | pfsync_bulkfail, LIST_FIRST(&pfsync_list)); |
| 1018 | lwkt_gettoken(&pf_token); |
| 1019 | error = pfsync_request_update(NULL, NULL); |
| 1020 | if (error == ENOMEM) { |
| 1021 | lwkt_reltoken(&pf_token); |
| 1022 | crit_exit(); |
| 1023 | return (ENOMEM); |
| 1024 | } |
| 1025 | pfsync_sendout(sc); |
| 1026 | } |
| 1027 | crit_exit(); |
| 1028 | |
| 1029 | break; |
| 1030 | |
| 1031 | default: |
| 1032 | lwkt_reltoken(&pf_token); |
| 1033 | return (ENOTTY); |
| 1034 | } |
| 1035 | |
| 1036 | lwkt_reltoken(&pf_token); |
| 1037 | return (0); |
| 1038 | } |
| 1039 | |
| 1040 | void |
| 1041 | pfsync_setmtu(struct pfsync_softc *sc, int mtu_req) |
| 1042 | { |
| 1043 | int mtu; |
| 1044 | |
| 1045 | if (sc->sc_sync_ifp && sc->sc_sync_ifp->if_mtu < mtu_req) |
| 1046 | mtu = sc->sc_sync_ifp->if_mtu; |
| 1047 | else |
| 1048 | mtu = mtu_req; |
| 1049 | |
| 1050 | sc->sc_maxcount = (mtu - sizeof(struct pfsync_header)) / |
| 1051 | sizeof(struct pfsync_state); |
| 1052 | if (sc->sc_maxcount > 254) |
| 1053 | sc->sc_maxcount = 254; |
| 1054 | sc->sc_if.if_mtu = sizeof(struct pfsync_header) + |
| 1055 | sc->sc_maxcount * sizeof(struct pfsync_state); |
| 1056 | } |
| 1057 | |
| 1058 | struct mbuf * |
| 1059 | pfsync_get_mbuf(struct pfsync_softc *sc, u_int8_t action, void **sp) |
| 1060 | { |
| 1061 | struct pfsync_header *h; |
| 1062 | struct mbuf *m; |
| 1063 | int len; |
| 1064 | |
| 1065 | ASSERT_LWKT_TOKEN_HELD(&pf_token); |
| 1066 | |
| 1067 | MGETHDR(m, M_WAITOK, MT_DATA); |
| 1068 | if (m == NULL) { |
| 1069 | sc->sc_if.if_oerrors++; |
| 1070 | return (NULL); |
| 1071 | } |
| 1072 | |
| 1073 | switch (action) { |
| 1074 | case PFSYNC_ACT_CLR: |
| 1075 | len = sizeof(struct pfsync_header) + |
| 1076 | sizeof(struct pfsync_state_clr); |
| 1077 | break; |
| 1078 | case PFSYNC_ACT_UPD_C: |
| 1079 | len = (sc->sc_maxcount * sizeof(struct pfsync_state_upd)) + |
| 1080 | sizeof(struct pfsync_header); |
| 1081 | break; |
| 1082 | case PFSYNC_ACT_DEL_C: |
| 1083 | len = (sc->sc_maxcount * sizeof(struct pfsync_state_del)) + |
| 1084 | sizeof(struct pfsync_header); |
| 1085 | break; |
| 1086 | case PFSYNC_ACT_UREQ: |
| 1087 | len = (sc->sc_maxcount * sizeof(struct pfsync_state_upd_req)) + |
| 1088 | sizeof(struct pfsync_header); |
| 1089 | break; |
| 1090 | case PFSYNC_ACT_BUS: |
| 1091 | len = sizeof(struct pfsync_header) + |
| 1092 | sizeof(struct pfsync_state_bus); |
| 1093 | break; |
| 1094 | case PFSYNC_ACT_TDB_UPD: |
| 1095 | len = (sc->sc_maxcount * sizeof(struct pfsync_tdb)) + |
| 1096 | sizeof(struct pfsync_header); |
| 1097 | break; |
| 1098 | default: |
| 1099 | len = (sc->sc_maxcount * sizeof(struct pfsync_state)) + |
| 1100 | sizeof(struct pfsync_header); |
| 1101 | break; |
| 1102 | } |
| 1103 | |
| 1104 | if (len > MHLEN) { |
| 1105 | MCLGET(m, M_WAITOK); |
| 1106 | if ((m->m_flags & M_EXT) == 0) { |
| 1107 | m_free(m); |
| 1108 | sc->sc_if.if_oerrors++; |
| 1109 | return (NULL); |
| 1110 | } |
| 1111 | m->m_data += (MCLBYTES - len) &~ (sizeof(long) - 1); |
| 1112 | } else |
| 1113 | MH_ALIGN(m, len); |
| 1114 | |
| 1115 | m->m_pkthdr.rcvif = NULL; |
| 1116 | m->m_pkthdr.len = m->m_len = sizeof(struct pfsync_header); |
| 1117 | h = mtod(m, struct pfsync_header *); |
| 1118 | h->version = PFSYNC_VERSION; |
| 1119 | h->af = 0; |
| 1120 | h->count = 0; |
| 1121 | h->action = action; |
| 1122 | |
| 1123 | *sp = (void *)((char *)h + PFSYNC_HDRLEN); |
| 1124 | lwkt_reltoken(&pf_token); |
| 1125 | callout_reset(&sc->sc_tmo, hz, pfsync_timeout, |
| 1126 | LIST_FIRST(&pfsync_list)); |
| 1127 | lwkt_gettoken(&pf_token); |
| 1128 | return (m); |
| 1129 | } |
| 1130 | |
| 1131 | int |
| 1132 | pfsync_pack_state(u_int8_t action, struct pf_state *st, int flags) |
| 1133 | { |
| 1134 | struct ifnet *ifp = NULL; |
| 1135 | struct pfsync_softc *sc = pfsyncif; |
| 1136 | struct pfsync_header *h, *h_net; |
| 1137 | struct pfsync_state *sp = NULL; |
| 1138 | struct pfsync_state_upd *up = NULL; |
| 1139 | struct pfsync_state_del *dp = NULL; |
| 1140 | struct pf_state_key *sk = st->state_key; |
| 1141 | struct pf_rule *r; |
| 1142 | u_long secs; |
| 1143 | int ret = 0; |
| 1144 | u_int8_t i = 255, newaction = 0; |
| 1145 | |
| 1146 | if (sc == NULL) |
| 1147 | return (0); |
| 1148 | ifp = &sc->sc_if; |
| 1149 | |
| 1150 | /* |
| 1151 | * If a packet falls in the forest and there's nobody around to |
| 1152 | * hear, does it make a sound? |
| 1153 | */ |
| 1154 | if (ifp->if_bpf == NULL && sc->sc_sync_ifp == NULL && |
| 1155 | sc->sc_sync_peer.s_addr == INADDR_PFSYNC_GROUP) { |
| 1156 | /* Don't leave any stale pfsync packets hanging around. */ |
| 1157 | if (sc->sc_mbuf != NULL) { |
| 1158 | m_freem(sc->sc_mbuf); |
| 1159 | sc->sc_mbuf = NULL; |
| 1160 | sc->sc_statep.s = NULL; |
| 1161 | } |
| 1162 | return (0); |
| 1163 | } |
| 1164 | |
| 1165 | if (action >= PFSYNC_ACT_MAX) |
| 1166 | return (EINVAL); |
| 1167 | |
| 1168 | crit_enter(); |
| 1169 | if (sc->sc_mbuf == NULL) { |
| 1170 | if ((sc->sc_mbuf = pfsync_get_mbuf(sc, action, |
| 1171 | (void *)&sc->sc_statep.s)) == NULL) { |
| 1172 | crit_exit(); |
| 1173 | return (ENOMEM); |
| 1174 | } |
| 1175 | h = mtod(sc->sc_mbuf, struct pfsync_header *); |
| 1176 | } else { |
| 1177 | h = mtod(sc->sc_mbuf, struct pfsync_header *); |
| 1178 | if (h->action != action) { |
| 1179 | pfsync_sendout(sc); |
| 1180 | if ((sc->sc_mbuf = pfsync_get_mbuf(sc, action, |
| 1181 | (void *)&sc->sc_statep.s)) == NULL) { |
| 1182 | crit_exit(); |
| 1183 | return (ENOMEM); |
| 1184 | } |
| 1185 | h = mtod(sc->sc_mbuf, struct pfsync_header *); |
| 1186 | } else { |
| 1187 | /* |
| 1188 | * If it's an update, look in the packet to see if |
| 1189 | * we already have an update for the state. |
| 1190 | */ |
| 1191 | if (action == PFSYNC_ACT_UPD && sc->sc_maxupdates) { |
| 1192 | struct pfsync_state *usp = |
| 1193 | (void *)((char *)h + PFSYNC_HDRLEN); |
| 1194 | |
| 1195 | for (i = 0; i < h->count; i++) { |
| 1196 | if (!memcmp(usp->id, &st->id, |
| 1197 | PFSYNC_ID_LEN) && |
| 1198 | usp->creatorid == st->creatorid) { |
| 1199 | sp = usp; |
| 1200 | sp->updates++; |
| 1201 | break; |
| 1202 | } |
| 1203 | usp++; |
| 1204 | } |
| 1205 | } |
| 1206 | } |
| 1207 | } |
| 1208 | |
| 1209 | secs = time_second; |
| 1210 | |
| 1211 | st->pfsync_time = mycpu->gd_time_seconds;; |
| 1212 | |
| 1213 | if (sp == NULL) { |
| 1214 | /* not a "duplicate" update */ |
| 1215 | i = 255; |
| 1216 | sp = sc->sc_statep.s++; |
| 1217 | sc->sc_mbuf->m_pkthdr.len = |
| 1218 | sc->sc_mbuf->m_len += sizeof(struct pfsync_state); |
| 1219 | h->count++; |
| 1220 | bzero(sp, sizeof(*sp)); |
| 1221 | |
| 1222 | bcopy(&st->id, sp->id, sizeof(sp->id)); |
| 1223 | sp->creatorid = st->creatorid; |
| 1224 | |
| 1225 | strlcpy(sp->ifname, st->kif->pfik_name, sizeof(sp->ifname)); |
| 1226 | pf_state_host_hton(&sk->lan, &sp->lan); |
| 1227 | pf_state_host_hton(&sk->gwy, &sp->gwy); |
| 1228 | pf_state_host_hton(&sk->ext, &sp->ext); |
| 1229 | |
| 1230 | bcopy(&st->rt_addr, &sp->rt_addr, sizeof(sp->rt_addr)); |
| 1231 | |
| 1232 | sp->creation = htonl(secs - st->creation); |
| 1233 | pf_state_counter_hton(st->packets[0], sp->packets[0]); |
| 1234 | pf_state_counter_hton(st->packets[1], sp->packets[1]); |
| 1235 | pf_state_counter_hton(st->bytes[0], sp->bytes[0]); |
| 1236 | pf_state_counter_hton(st->bytes[1], sp->bytes[1]); |
| 1237 | if ((r = st->rule.ptr) == NULL) |
| 1238 | sp->rule = htonl(-1); |
| 1239 | else |
| 1240 | sp->rule = htonl(r->nr); |
| 1241 | if ((r = st->anchor.ptr) == NULL) |
| 1242 | sp->anchor = htonl(-1); |
| 1243 | else |
| 1244 | sp->anchor = htonl(r->nr); |
| 1245 | sp->af = sk->af; |
| 1246 | sp->proto = sk->proto; |
| 1247 | sp->direction = sk->direction; |
| 1248 | sp->log = st->log; |
| 1249 | sp->allow_opts = st->allow_opts; |
| 1250 | sp->timeout = st->timeout; |
| 1251 | |
| 1252 | if (flags & PFSYNC_FLAG_STALE) |
| 1253 | sp->sync_flags |= PFSTATE_STALE; |
| 1254 | } |
| 1255 | |
| 1256 | pf_state_peer_hton(&st->src, &sp->src); |
| 1257 | pf_state_peer_hton(&st->dst, &sp->dst); |
| 1258 | |
| 1259 | if (st->expire <= secs) |
| 1260 | sp->expire = htonl(0); |
| 1261 | else |
| 1262 | sp->expire = htonl(st->expire - secs); |
| 1263 | |
| 1264 | /* do we need to build "compressed" actions for network transfer? */ |
| 1265 | if (sc->sc_sync_ifp && flags & PFSYNC_FLAG_COMPRESS) { |
| 1266 | switch (action) { |
| 1267 | case PFSYNC_ACT_UPD: |
| 1268 | newaction = PFSYNC_ACT_UPD_C; |
| 1269 | break; |
| 1270 | case PFSYNC_ACT_DEL: |
| 1271 | newaction = PFSYNC_ACT_DEL_C; |
| 1272 | break; |
| 1273 | default: |
| 1274 | /* by default we just send the uncompressed states */ |
| 1275 | break; |
| 1276 | } |
| 1277 | } |
| 1278 | |
| 1279 | if (newaction) { |
| 1280 | if (sc->sc_mbuf_net == NULL) { |
| 1281 | if ((sc->sc_mbuf_net = pfsync_get_mbuf(sc, newaction, |
| 1282 | (void *)&sc->sc_statep_net.s)) == NULL) { |
| 1283 | crit_exit(); |
| 1284 | return (ENOMEM); |
| 1285 | } |
| 1286 | } |
| 1287 | h_net = mtod(sc->sc_mbuf_net, struct pfsync_header *); |
| 1288 | |
| 1289 | switch (newaction) { |
| 1290 | case PFSYNC_ACT_UPD_C: |
| 1291 | if (i != 255) { |
| 1292 | up = (void *)((char *)h_net + |
| 1293 | PFSYNC_HDRLEN + (i * sizeof(*up))); |
| 1294 | up->updates++; |
| 1295 | } else { |
| 1296 | h_net->count++; |
| 1297 | sc->sc_mbuf_net->m_pkthdr.len = |
| 1298 | sc->sc_mbuf_net->m_len += sizeof(*up); |
| 1299 | up = sc->sc_statep_net.u++; |
| 1300 | |
| 1301 | bzero(up, sizeof(*up)); |
| 1302 | bcopy(&st->id, up->id, sizeof(up->id)); |
| 1303 | up->creatorid = st->creatorid; |
| 1304 | } |
| 1305 | up->timeout = st->timeout; |
| 1306 | up->expire = sp->expire; |
| 1307 | up->src = sp->src; |
| 1308 | up->dst = sp->dst; |
| 1309 | break; |
| 1310 | case PFSYNC_ACT_DEL_C: |
| 1311 | sc->sc_mbuf_net->m_pkthdr.len = |
| 1312 | sc->sc_mbuf_net->m_len += sizeof(*dp); |
| 1313 | dp = sc->sc_statep_net.d++; |
| 1314 | h_net->count++; |
| 1315 | |
| 1316 | bzero(dp, sizeof(*dp)); |
| 1317 | bcopy(&st->id, dp->id, sizeof(dp->id)); |
| 1318 | dp->creatorid = st->creatorid; |
| 1319 | break; |
| 1320 | } |
| 1321 | } |
| 1322 | |
| 1323 | if (h->count == sc->sc_maxcount || |
| 1324 | (sc->sc_maxupdates && (sp->updates >= sc->sc_maxupdates))) |
| 1325 | ret = pfsync_sendout(sc); |
| 1326 | |
| 1327 | crit_exit(); |
| 1328 | return (ret); |
| 1329 | } |
| 1330 | |
| 1331 | int |
| 1332 | pfsync_request_update(struct pfsync_state_upd *up, struct in_addr *src) |
| 1333 | { |
| 1334 | struct ifnet *ifp = NULL; |
| 1335 | struct pfsync_header *h; |
| 1336 | struct pfsync_softc *sc = pfsyncif; |
| 1337 | struct pfsync_state_upd_req *rup; |
| 1338 | int ret = 0; |
| 1339 | |
| 1340 | if (sc == NULL) |
| 1341 | return (0); |
| 1342 | |
| 1343 | ifp = &sc->sc_if; |
| 1344 | if (sc->sc_mbuf == NULL) { |
| 1345 | if ((sc->sc_mbuf = pfsync_get_mbuf(sc, PFSYNC_ACT_UREQ, |
| 1346 | (void *)&sc->sc_statep.s)) == NULL) |
| 1347 | return (ENOMEM); |
| 1348 | h = mtod(sc->sc_mbuf, struct pfsync_header *); |
| 1349 | } else { |
| 1350 | h = mtod(sc->sc_mbuf, struct pfsync_header *); |
| 1351 | if (h->action != PFSYNC_ACT_UREQ) { |
| 1352 | pfsync_sendout(sc); |
| 1353 | if ((sc->sc_mbuf = pfsync_get_mbuf(sc, PFSYNC_ACT_UREQ, |
| 1354 | (void *)&sc->sc_statep.s)) == NULL) |
| 1355 | return (ENOMEM); |
| 1356 | h = mtod(sc->sc_mbuf, struct pfsync_header *); |
| 1357 | } |
| 1358 | } |
| 1359 | |
| 1360 | if (src != NULL) |
| 1361 | sc->sc_sendaddr = *src; |
| 1362 | sc->sc_mbuf->m_pkthdr.len = sc->sc_mbuf->m_len += sizeof(*rup); |
| 1363 | h->count++; |
| 1364 | rup = sc->sc_statep.r++; |
| 1365 | bzero(rup, sizeof(*rup)); |
| 1366 | if (up != NULL) { |
| 1367 | bcopy(up->id, rup->id, sizeof(rup->id)); |
| 1368 | rup->creatorid = up->creatorid; |
| 1369 | } |
| 1370 | |
| 1371 | if (h->count == sc->sc_maxcount) |
| 1372 | ret = pfsync_sendout(sc); |
| 1373 | |
| 1374 | return (ret); |
| 1375 | } |
| 1376 | |
| 1377 | int |
| 1378 | pfsync_clear_states(u_int32_t creatorid, char *ifname) |
| 1379 | { |
| 1380 | struct ifnet *ifp = NULL; |
| 1381 | struct pfsync_softc *sc = pfsyncif; |
| 1382 | struct pfsync_state_clr *cp; |
| 1383 | int ret; |
| 1384 | |
| 1385 | if (sc == NULL) |
| 1386 | return (0); |
| 1387 | |
| 1388 | ifp = &sc->sc_if; |
| 1389 | crit_enter(); |
| 1390 | if (sc->sc_mbuf != NULL) |
| 1391 | pfsync_sendout(sc); |
| 1392 | if ((sc->sc_mbuf = pfsync_get_mbuf(sc, PFSYNC_ACT_CLR, |
| 1393 | (void *)&sc->sc_statep.c)) == NULL) { |
| 1394 | crit_exit(); |
| 1395 | return (ENOMEM); |
| 1396 | } |
| 1397 | sc->sc_mbuf->m_pkthdr.len = sc->sc_mbuf->m_len += sizeof(*cp); |
| 1398 | cp = sc->sc_statep.c; |
| 1399 | cp->creatorid = creatorid; |
| 1400 | if (ifname != NULL) |
| 1401 | strlcpy(cp->ifname, ifname, IFNAMSIZ); |
| 1402 | |
| 1403 | ret = (pfsync_sendout(sc)); |
| 1404 | crit_exit(); |
| 1405 | return (ret); |
| 1406 | } |
| 1407 | |
| 1408 | void |
| 1409 | pfsync_timeout(void *v) |
| 1410 | { |
| 1411 | struct pfsync_softc *sc = v; |
| 1412 | |
| 1413 | crit_enter(); |
| 1414 | pfsync_sendout(sc); |
| 1415 | crit_exit(); |
| 1416 | } |
| 1417 | |
| 1418 | void |
| 1419 | pfsync_send_bus(struct pfsync_softc *sc, u_int8_t status) |
| 1420 | { |
| 1421 | struct pfsync_state_bus *bus; |
| 1422 | |
| 1423 | if (sc->sc_mbuf != NULL) |
| 1424 | pfsync_sendout(sc); |
| 1425 | |
| 1426 | if (pfsync_sync_ok && |
| 1427 | (sc->sc_mbuf = pfsync_get_mbuf(sc, PFSYNC_ACT_BUS, |
| 1428 | (void *)&sc->sc_statep.b)) != NULL) { |
| 1429 | sc->sc_mbuf->m_pkthdr.len = sc->sc_mbuf->m_len += sizeof(*bus); |
| 1430 | bus = sc->sc_statep.b; |
| 1431 | bus->creatorid = pf_status.hostid; |
| 1432 | bus->status = status; |
| 1433 | bus->endtime = htonl(mycpu->gd_time_seconds - sc->sc_ureq_received); |
| 1434 | pfsync_sendout(sc); |
| 1435 | } |
| 1436 | } |
| 1437 | |
| 1438 | void |
| 1439 | pfsync_bulk_update(void *v) |
| 1440 | { |
| 1441 | struct pfsync_softc *sc = v; |
| 1442 | int i = 0; |
| 1443 | struct pf_state *state; |
| 1444 | |
| 1445 | ASSERT_LWKT_TOKEN_HELD(&pf_token); |
| 1446 | |
| 1447 | crit_enter(); |
| 1448 | if (sc->sc_mbuf != NULL) |
| 1449 | pfsync_sendout(sc); |
| 1450 | |
| 1451 | /* |
| 1452 | * Grab at most PFSYNC_BULKPACKETS worth of states which have not |
| 1453 | * been sent since the latest request was made. |
| 1454 | */ |
| 1455 | state = sc->sc_bulk_send_next; |
| 1456 | if (state) |
| 1457 | do { |
| 1458 | /* send state update if syncable and not already sent */ |
| 1459 | if (!state->sync_flags |
| 1460 | && state->timeout < PFTM_MAX |
| 1461 | && state->pfsync_time <= sc->sc_ureq_received) { |
| 1462 | pfsync_pack_state(PFSYNC_ACT_UPD, state, 0); |
| 1463 | i++; |
| 1464 | } |
| 1465 | |
| 1466 | /* figure next state to send */ |
| 1467 | state = TAILQ_NEXT(state, entry_list); |
| 1468 | |
| 1469 | /* wrap to start of list if we hit the end */ |
| 1470 | if (!state) |
| 1471 | state = TAILQ_FIRST(&state_list); |
| 1472 | } while (i < sc->sc_maxcount * PFSYNC_BULKPACKETS && |
| 1473 | state != sc->sc_bulk_terminator); |
| 1474 | |
| 1475 | if (!state || state == sc->sc_bulk_terminator) { |
| 1476 | /* we're done */ |
| 1477 | pfsync_send_bus(sc, PFSYNC_BUS_END); |
| 1478 | sc->sc_ureq_received = 0; |
| 1479 | sc->sc_bulk_send_next = NULL; |
| 1480 | sc->sc_bulk_terminator = NULL; |
| 1481 | lwkt_reltoken(&pf_token); |
| 1482 | callout_stop(&sc->sc_bulk_tmo); |
| 1483 | lwkt_gettoken(&pf_token); |
| 1484 | if (pf_status.debug >= PF_DEBUG_MISC) |
| 1485 | kprintf("pfsync: bulk update complete\n"); |
| 1486 | } else { |
| 1487 | /* look again for more in a bit */ |
| 1488 | lwkt_reltoken(&pf_token); |
| 1489 | callout_reset(&sc->sc_bulk_tmo, 1, pfsync_timeout, |
| 1490 | LIST_FIRST(&pfsync_list)); |
| 1491 | lwkt_gettoken(&pf_token); |
| 1492 | sc->sc_bulk_send_next = state; |
| 1493 | } |
| 1494 | if (sc->sc_mbuf != NULL) |
| 1495 | pfsync_sendout(sc); |
| 1496 | crit_exit(); |
| 1497 | } |
| 1498 | |
| 1499 | void |
| 1500 | pfsync_bulkfail(void *v) |
| 1501 | { |
| 1502 | struct pfsync_softc *sc = v; |
| 1503 | int error; |
| 1504 | |
| 1505 | ASSERT_LWKT_TOKEN_HELD(&pf_token); |
| 1506 | |
| 1507 | if (sc->sc_bulk_tries++ < PFSYNC_MAX_BULKTRIES) { |
| 1508 | /* Try again in a bit */ |
| 1509 | lwkt_reltoken(&pf_token); |
| 1510 | callout_reset(&sc->sc_bulkfail_tmo, 5 * hz, pfsync_bulkfail, |
| 1511 | LIST_FIRST(&pfsync_list)); |
| 1512 | lwkt_gettoken(&pf_token); |
| 1513 | crit_enter(); |
| 1514 | error = pfsync_request_update(NULL, NULL); |
| 1515 | if (error == ENOMEM) { |
| 1516 | if (pf_status.debug >= PF_DEBUG_MISC) |
| 1517 | kprintf("pfsync: cannot allocate mbufs for " |
| 1518 | "bulk update\n"); |
| 1519 | } else |
| 1520 | pfsync_sendout(sc); |
| 1521 | crit_exit(); |
| 1522 | } else { |
| 1523 | /* Pretend like the transfer was ok */ |
| 1524 | sc->sc_ureq_sent = 0; |
| 1525 | sc->sc_bulk_tries = 0; |
| 1526 | #if NCARP > 0 |
| 1527 | if (!pfsync_sync_ok) |
| 1528 | carp_group_demote_adj(&sc->sc_if, -1); |
| 1529 | #endif |
| 1530 | pfsync_sync_ok = 1; |
| 1531 | if (pf_status.debug >= PF_DEBUG_MISC) |
| 1532 | kprintf("pfsync: failed to receive " |
| 1533 | "bulk update status\n"); |
| 1534 | lwkt_reltoken(&pf_token); |
| 1535 | callout_stop(&sc->sc_bulkfail_tmo); |
| 1536 | lwkt_gettoken(&pf_token); |
| 1537 | } |
| 1538 | } |
| 1539 | |
| 1540 | /* This must be called in splnet() */ |
| 1541 | int |
| 1542 | pfsync_sendout(struct pfsync_softc *sc) |
| 1543 | { |
| 1544 | #if NBPFILTER > 0 |
| 1545 | struct ifnet *ifp = &sc->sc_if; |
| 1546 | #endif |
| 1547 | struct mbuf *m; |
| 1548 | |
| 1549 | ASSERT_LWKT_TOKEN_HELD(&pf_token); |
| 1550 | |
| 1551 | lwkt_reltoken(&pf_token); |
| 1552 | callout_stop(&sc->sc_tmo); |
| 1553 | lwkt_gettoken(&pf_token); |
| 1554 | |
| 1555 | if (sc->sc_mbuf == NULL) |
| 1556 | return (0); |
| 1557 | m = sc->sc_mbuf; |
| 1558 | sc->sc_mbuf = NULL; |
| 1559 | sc->sc_statep.s = NULL; |
| 1560 | |
| 1561 | #if NBPFILTER > 0 |
| 1562 | if (ifp->if_bpf) { |
| 1563 | lwkt_reltoken(&pf_token); |
| 1564 | bpf_mtap(ifp->if_bpf, m, BPF_DIRECTION_OUT); |
| 1565 | lwkt_gettoken(&pf_token); |
| 1566 | } |
| 1567 | #endif |
| 1568 | |
| 1569 | if (sc->sc_mbuf_net) { |
| 1570 | m_freem(m); |
| 1571 | m = sc->sc_mbuf_net; |
| 1572 | sc->sc_mbuf_net = NULL; |
| 1573 | sc->sc_statep_net.s = NULL; |
| 1574 | } |
| 1575 | |
| 1576 | return pfsync_sendout_mbuf(sc, m); |
| 1577 | } |
| 1578 | |
| 1579 | int |
| 1580 | pfsync_sendout_mbuf(struct pfsync_softc *sc, struct mbuf *m) |
| 1581 | { |
| 1582 | struct sockaddr sa; |
| 1583 | struct ip *ip; |
| 1584 | |
| 1585 | if (sc->sc_sync_ifp || |
| 1586 | sc->sc_sync_peer.s_addr != INADDR_PFSYNC_GROUP) { |
| 1587 | M_PREPEND(m, sizeof(struct ip), M_WAITOK); |
| 1588 | if (m == NULL) { |
| 1589 | pfsyncstats.pfsyncs_onomem++; |
| 1590 | return (0); |
| 1591 | } |
| 1592 | ip = mtod(m, struct ip *); |
| 1593 | ip->ip_v = IPVERSION; |
| 1594 | ip->ip_hl = sizeof(*ip) >> 2; |
| 1595 | ip->ip_tos = IPTOS_LOWDELAY; |
| 1596 | ip->ip_len = htons(m->m_pkthdr.len); |
| 1597 | ip->ip_id = htons(ip_randomid()); |
| 1598 | ip->ip_off = htons(IP_DF); |
| 1599 | ip->ip_ttl = PFSYNC_DFLTTL; |
| 1600 | ip->ip_p = IPPROTO_PFSYNC; |
| 1601 | ip->ip_sum = 0; |
| 1602 | |
| 1603 | bzero(&sa, sizeof(sa)); |
| 1604 | ip->ip_src.s_addr = INADDR_ANY; |
| 1605 | |
| 1606 | if (sc->sc_sendaddr.s_addr == INADDR_PFSYNC_GROUP) |
| 1607 | m->m_flags |= M_MCAST; |
| 1608 | ip->ip_dst = sc->sc_sendaddr; |
| 1609 | sc->sc_sendaddr.s_addr = sc->sc_sync_peer.s_addr; |
| 1610 | |
| 1611 | pfsyncstats.pfsyncs_opackets++; |
| 1612 | |
| 1613 | if (ip_output(m, NULL, NULL, IP_RAWOUTPUT, &sc->sc_imo, NULL)) |
| 1614 | pfsyncstats.pfsyncs_oerrors++; |
| 1615 | } else |
| 1616 | m_freem(m); |
| 1617 | |
| 1618 | return (0); |
| 1619 | } |
| 1620 | |
| 1621 | static int |
| 1622 | pfsync_modevent(module_t mod, int type, void *data) |
| 1623 | { |
| 1624 | int error = 0; |
| 1625 | |
| 1626 | lwkt_gettoken(&pf_token); |
| 1627 | |
| 1628 | switch (type) { |
| 1629 | case MOD_LOAD: |
| 1630 | LIST_INIT(&pfsync_list); |
| 1631 | lwkt_reltoken(&pf_token); |
| 1632 | if_clone_attach(&pfsync_cloner); |
| 1633 | lwkt_gettoken(&pf_token); |
| 1634 | break; |
| 1635 | |
| 1636 | case MOD_UNLOAD: |
| 1637 | lwkt_reltoken(&pf_token); |
| 1638 | if_clone_detach(&pfsync_cloner); |
| 1639 | lwkt_gettoken(&pf_token); |
| 1640 | while (!LIST_EMPTY(&pfsync_list)) |
| 1641 | pfsync_clone_destroy( |
| 1642 | &LIST_FIRST(&pfsync_list)->sc_if); |
| 1643 | break; |
| 1644 | |
| 1645 | default: |
| 1646 | error = EINVAL; |
| 1647 | break; |
| 1648 | } |
| 1649 | |
| 1650 | lwkt_reltoken(&pf_token); |
| 1651 | return error; |
| 1652 | } |
| 1653 | |
| 1654 | static moduledata_t pfsync_mod = { |
| 1655 | "pfsync", |
| 1656 | pfsync_modevent, |
| 1657 | 0 |
| 1658 | }; |
| 1659 | |
| 1660 | #define PFSYNC_MODVER 1 |
| 1661 | |
| 1662 | DECLARE_MODULE(pfsync, pfsync_mod, SI_SUB_PSEUDO, SI_ORDER_ANY); |
| 1663 | MODULE_VERSION(pfsync, PFSYNC_MODVER); |
| 1664 | |
| 1665 | |
| 1666 | |