1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause 3 * 4 * Copyright (c) 2001 Daniel Hartmeier 5 * Copyright (c) 2003 Cedric Berger 6 * Copyright (c) 2005 Henning Brauer <henning@openbsd.org> 7 * Copyright (c) 2005 Ryan McBride <mcbride@openbsd.org> 8 * Copyright (c) 2012 Gleb Smirnoff <glebius@FreeBSD.org> 9 * All rights reserved. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 15 * - Redistributions of source code must retain the above copyright 16 * notice, this list of conditions and the following disclaimer. 17 * - Redistributions in binary form must reproduce the above 18 * copyright notice, this list of conditions and the following 19 * disclaimer in the documentation and/or other materials provided 20 * with the distribution. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 23 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 24 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 25 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE 26 * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 27 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 28 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 29 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER 30 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN 32 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 33 * POSSIBILITY OF SUCH DAMAGE. 34 * 35 * $OpenBSD: pf_if.c,v 1.54 2008/06/14 16:55:28 mk Exp $ 36 */ 37 38 #include <sys/cdefs.h> 39 __FBSDID("$FreeBSD$"); 40 41 #include "opt_inet.h" 42 #include "opt_inet6.h" 43 44 #include <sys/param.h> 45 #include <sys/kernel.h> 46 #include <sys/eventhandler.h> 47 #include <sys/lock.h> 48 #include <sys/mbuf.h> 49 #include <sys/socket.h> 50 51 #include <net/if.h> 52 #include <net/if_var.h> 53 #include <net/vnet.h> 54 #include <net/pfvar.h> 55 #include <net/route.h> 56 57 VNET_DEFINE(struct pfi_kif *, pfi_all); 58 VNET_DEFINE_STATIC(long, pfi_update); 59 #define V_pfi_update VNET(pfi_update) 60 #define PFI_BUFFER_MAX 0x10000 61 62 VNET_DECLARE(int, pf_vnet_active); 63 #define V_pf_vnet_active VNET(pf_vnet_active) 64 65 VNET_DEFINE_STATIC(struct pfr_addr *, pfi_buffer); 66 VNET_DEFINE_STATIC(int, pfi_buffer_cnt); 67 VNET_DEFINE_STATIC(int, pfi_buffer_max); 68 #define V_pfi_buffer VNET(pfi_buffer) 69 #define V_pfi_buffer_cnt VNET(pfi_buffer_cnt) 70 #define V_pfi_buffer_max VNET(pfi_buffer_max) 71 72 eventhandler_tag pfi_attach_cookie; 73 eventhandler_tag pfi_detach_cookie; 74 eventhandler_tag pfi_attach_group_cookie; 75 eventhandler_tag pfi_change_group_cookie; 76 eventhandler_tag pfi_detach_group_cookie; 77 eventhandler_tag pfi_ifaddr_event_cookie; 78 79 static void pfi_attach_ifnet(struct ifnet *); 80 static void pfi_attach_ifgroup(struct ifg_group *); 81 82 static void pfi_kif_update(struct pfi_kif *); 83 static void pfi_dynaddr_update(struct pfi_dynaddr *dyn); 84 static void pfi_table_update(struct pfr_ktable *, struct pfi_kif *, int, 85 int); 86 static void pfi_instance_add(struct ifnet *, int, int); 87 static void pfi_address_add(struct sockaddr *, int, int); 88 static int pfi_if_compare(struct pfi_kif *, struct pfi_kif *); 89 static int pfi_skip_if(const char *, struct pfi_kif *); 90 static int pfi_unmask(void *); 91 static void pfi_attach_ifnet_event(void * __unused, struct ifnet *); 92 static void pfi_detach_ifnet_event(void * __unused, struct ifnet *); 93 static void pfi_attach_group_event(void * __unused, struct ifg_group *); 94 static void pfi_change_group_event(void * __unused, char *); 95 static void pfi_detach_group_event(void * __unused, struct ifg_group *); 96 static void pfi_ifaddr_event(void * __unused, struct ifnet *); 97 98 RB_HEAD(pfi_ifhead, pfi_kif); 99 static RB_PROTOTYPE(pfi_ifhead, pfi_kif, pfik_tree, pfi_if_compare); 100 static RB_GENERATE(pfi_ifhead, pfi_kif, pfik_tree, pfi_if_compare); 101 VNET_DEFINE_STATIC(struct pfi_ifhead, pfi_ifs); 102 #define V_pfi_ifs VNET(pfi_ifs) 103 104 #define PFI_BUFFER_MAX 0x10000 105 MALLOC_DEFINE(PFI_MTYPE, "pf_ifnet", "pf(4) interface database"); 106 107 LIST_HEAD(pfi_list, pfi_kif); 108 VNET_DEFINE_STATIC(struct pfi_list, pfi_unlinked_kifs); 109 #define V_pfi_unlinked_kifs VNET(pfi_unlinked_kifs) 110 static struct mtx pfi_unlnkdkifs_mtx; 111 MTX_SYSINIT(pfi_unlnkdkifs_mtx, &pfi_unlnkdkifs_mtx, "pf unlinked interfaces", 112 MTX_DEF); 113 114 void 115 pfi_initialize_vnet(void) 116 { 117 struct ifg_group *ifg; 118 struct ifnet *ifp; 119 struct pfi_kif *kif; 120 121 V_pfi_buffer_max = 64; 122 V_pfi_buffer = malloc(V_pfi_buffer_max * sizeof(*V_pfi_buffer), 123 PFI_MTYPE, M_WAITOK); 124 125 kif = malloc(sizeof(*kif), PFI_MTYPE, M_WAITOK); 126 PF_RULES_WLOCK(); 127 V_pfi_all = pfi_kif_attach(kif, IFG_ALL); 128 PF_RULES_WUNLOCK(); 129 130 IFNET_RLOCK(); 131 CK_STAILQ_FOREACH(ifg, &V_ifg_head, ifg_next) 132 pfi_attach_ifgroup(ifg); 133 CK_STAILQ_FOREACH(ifp, &V_ifnet, if_link) 134 pfi_attach_ifnet(ifp); 135 IFNET_RUNLOCK(); 136 } 137 138 void 139 pfi_initialize(void) 140 { 141 142 pfi_attach_cookie = EVENTHANDLER_REGISTER(ifnet_arrival_event, 143 pfi_attach_ifnet_event, NULL, EVENTHANDLER_PRI_ANY); 144 pfi_detach_cookie = EVENTHANDLER_REGISTER(ifnet_departure_event, 145 pfi_detach_ifnet_event, NULL, EVENTHANDLER_PRI_ANY); 146 pfi_attach_group_cookie = EVENTHANDLER_REGISTER(group_attach_event, 147 pfi_attach_group_event, NULL, EVENTHANDLER_PRI_ANY); 148 pfi_change_group_cookie = EVENTHANDLER_REGISTER(group_change_event, 149 pfi_change_group_event, NULL, EVENTHANDLER_PRI_ANY); 150 pfi_detach_group_cookie = EVENTHANDLER_REGISTER(group_detach_event, 151 pfi_detach_group_event, NULL, EVENTHANDLER_PRI_ANY); 152 pfi_ifaddr_event_cookie = EVENTHANDLER_REGISTER(ifaddr_event, 153 pfi_ifaddr_event, NULL, EVENTHANDLER_PRI_ANY); 154 } 155 156 void 157 pfi_cleanup_vnet(void) 158 { 159 struct pfi_kif *kif; 160 161 PF_RULES_WASSERT(); 162 163 V_pfi_all = NULL; 164 while ((kif = RB_MIN(pfi_ifhead, &V_pfi_ifs))) { 165 RB_REMOVE(pfi_ifhead, &V_pfi_ifs, kif); 166 if (kif->pfik_group) 167 kif->pfik_group->ifg_pf_kif = NULL; 168 if (kif->pfik_ifp) { 169 if_rele(kif->pfik_ifp); 170 kif->pfik_ifp->if_pf_kif = NULL; 171 } 172 free(kif, PFI_MTYPE); 173 } 174 175 mtx_lock(&pfi_unlnkdkifs_mtx); 176 while ((kif = LIST_FIRST(&V_pfi_unlinked_kifs))) { 177 LIST_REMOVE(kif, pfik_list); 178 free(kif, PFI_MTYPE); 179 } 180 mtx_unlock(&pfi_unlnkdkifs_mtx); 181 182 free(V_pfi_buffer, PFI_MTYPE); 183 } 184 185 void 186 pfi_cleanup(void) 187 { 188 189 EVENTHANDLER_DEREGISTER(ifnet_arrival_event, pfi_attach_cookie); 190 EVENTHANDLER_DEREGISTER(ifnet_departure_event, pfi_detach_cookie); 191 EVENTHANDLER_DEREGISTER(group_attach_event, pfi_attach_group_cookie); 192 EVENTHANDLER_DEREGISTER(group_change_event, pfi_change_group_cookie); 193 EVENTHANDLER_DEREGISTER(group_detach_event, pfi_detach_group_cookie); 194 EVENTHANDLER_DEREGISTER(ifaddr_event, pfi_ifaddr_event_cookie); 195 } 196 197 struct pfi_kif * 198 pfi_kif_find(const char *kif_name) 199 { 200 struct pfi_kif_cmp s; 201 202 PF_RULES_ASSERT(); 203 204 bzero(&s, sizeof(s)); 205 strlcpy(s.pfik_name, kif_name, sizeof(s.pfik_name)); 206 207 return (RB_FIND(pfi_ifhead, &V_pfi_ifs, (struct pfi_kif *)&s)); 208 } 209 210 struct pfi_kif * 211 pfi_kif_attach(struct pfi_kif *kif, const char *kif_name) 212 { 213 struct pfi_kif *kif1; 214 215 PF_RULES_WASSERT(); 216 KASSERT(kif != NULL, ("%s: null kif", __func__)); 217 218 kif1 = pfi_kif_find(kif_name); 219 if (kif1 != NULL) { 220 free(kif, PFI_MTYPE); 221 return (kif1); 222 } 223 224 bzero(kif, sizeof(*kif)); 225 strlcpy(kif->pfik_name, kif_name, sizeof(kif->pfik_name)); 226 /* 227 * It seems that the value of time_second is in unintialzied state 228 * when pf sets interface statistics clear time in boot phase if pf 229 * was statically linked to kernel. Instead of setting the bogus 230 * time value have pfi_get_ifaces handle this case. In 231 * pfi_get_ifaces it uses time_second if it sees the time is 0. 232 */ 233 kif->pfik_tzero = time_second > 1 ? time_second : 0; 234 TAILQ_INIT(&kif->pfik_dynaddrs); 235 236 RB_INSERT(pfi_ifhead, &V_pfi_ifs, kif); 237 238 return (kif); 239 } 240 241 void 242 pfi_kif_ref(struct pfi_kif *kif) 243 { 244 245 PF_RULES_WASSERT(); 246 kif->pfik_rulerefs++; 247 } 248 249 void 250 pfi_kif_unref(struct pfi_kif *kif) 251 { 252 253 PF_RULES_WASSERT(); 254 KASSERT(kif->pfik_rulerefs > 0, ("%s: %p has zero refs", __func__, kif)); 255 256 kif->pfik_rulerefs--; 257 258 if (kif->pfik_rulerefs > 0) 259 return; 260 261 /* kif referencing an existing ifnet or group should exist. */ 262 if (kif->pfik_ifp != NULL || kif->pfik_group != NULL || kif == V_pfi_all) 263 return; 264 265 RB_REMOVE(pfi_ifhead, &V_pfi_ifs, kif); 266 267 kif->pfik_flags |= PFI_IFLAG_REFS; 268 269 mtx_lock(&pfi_unlnkdkifs_mtx); 270 LIST_INSERT_HEAD(&V_pfi_unlinked_kifs, kif, pfik_list); 271 mtx_unlock(&pfi_unlnkdkifs_mtx); 272 } 273 274 void 275 pfi_kif_purge(void) 276 { 277 struct pfi_kif *kif, *kif1; 278 279 /* 280 * Do naive mark-and-sweep garbage collecting of old kifs. 281 * Reference flag is raised by pf_purge_expired_states(). 282 */ 283 mtx_lock(&pfi_unlnkdkifs_mtx); 284 LIST_FOREACH_SAFE(kif, &V_pfi_unlinked_kifs, pfik_list, kif1) { 285 if (!(kif->pfik_flags & PFI_IFLAG_REFS)) { 286 LIST_REMOVE(kif, pfik_list); 287 free(kif, PFI_MTYPE); 288 } else 289 kif->pfik_flags &= ~PFI_IFLAG_REFS; 290 } 291 mtx_unlock(&pfi_unlnkdkifs_mtx); 292 } 293 294 int 295 pfi_kif_match(struct pfi_kif *rule_kif, struct pfi_kif *packet_kif) 296 { 297 struct ifg_list *p; 298 299 if (rule_kif == NULL || rule_kif == packet_kif) 300 return (1); 301 302 if (rule_kif->pfik_group != NULL) { 303 struct epoch_tracker et; 304 305 NET_EPOCH_ENTER(et); 306 CK_STAILQ_FOREACH(p, &packet_kif->pfik_ifp->if_groups, ifgl_next) 307 if (p->ifgl_group == rule_kif->pfik_group) { 308 NET_EPOCH_EXIT(et); 309 return (1); 310 } 311 NET_EPOCH_EXIT(et); 312 } 313 314 315 return (0); 316 } 317 318 static void 319 pfi_attach_ifnet(struct ifnet *ifp) 320 { 321 struct pfi_kif *kif; 322 323 kif = malloc(sizeof(*kif), PFI_MTYPE, M_WAITOK); 324 325 PF_RULES_WLOCK(); 326 V_pfi_update++; 327 kif = pfi_kif_attach(kif, ifp->if_xname); 328 329 if_ref(ifp); 330 331 kif->pfik_ifp = ifp; 332 ifp->if_pf_kif = kif; 333 334 pfi_kif_update(kif); 335 PF_RULES_WUNLOCK(); 336 } 337 338 static void 339 pfi_attach_ifgroup(struct ifg_group *ifg) 340 { 341 struct pfi_kif *kif; 342 343 kif = malloc(sizeof(*kif), PFI_MTYPE, M_WAITOK); 344 345 PF_RULES_WLOCK(); 346 V_pfi_update++; 347 kif = pfi_kif_attach(kif, ifg->ifg_group); 348 349 kif->pfik_group = ifg; 350 ifg->ifg_pf_kif = kif; 351 PF_RULES_WUNLOCK(); 352 } 353 354 int 355 pfi_match_addr(struct pfi_dynaddr *dyn, struct pf_addr *a, sa_family_t af) 356 { 357 switch (af) { 358 #ifdef INET 359 case AF_INET: 360 switch (dyn->pfid_acnt4) { 361 case 0: 362 return (0); 363 case 1: 364 return (PF_MATCHA(0, &dyn->pfid_addr4, 365 &dyn->pfid_mask4, a, AF_INET)); 366 default: 367 return (pfr_match_addr(dyn->pfid_kt, a, AF_INET)); 368 } 369 break; 370 #endif /* INET */ 371 #ifdef INET6 372 case AF_INET6: 373 switch (dyn->pfid_acnt6) { 374 case 0: 375 return (0); 376 case 1: 377 return (PF_MATCHA(0, &dyn->pfid_addr6, 378 &dyn->pfid_mask6, a, AF_INET6)); 379 default: 380 return (pfr_match_addr(dyn->pfid_kt, a, AF_INET6)); 381 } 382 break; 383 #endif /* INET6 */ 384 default: 385 return (0); 386 } 387 } 388 389 int 390 pfi_dynaddr_setup(struct pf_addr_wrap *aw, sa_family_t af) 391 { 392 struct pfi_dynaddr *dyn; 393 char tblname[PF_TABLE_NAME_SIZE]; 394 struct pf_ruleset *ruleset = NULL; 395 struct pfi_kif *kif; 396 int rv = 0; 397 398 PF_RULES_WASSERT(); 399 KASSERT(aw->type == PF_ADDR_DYNIFTL, ("%s: type %u", 400 __func__, aw->type)); 401 KASSERT(aw->p.dyn == NULL, ("%s: dyn is %p", __func__, aw->p.dyn)); 402 403 if ((dyn = malloc(sizeof(*dyn), PFI_MTYPE, M_NOWAIT | M_ZERO)) == NULL) 404 return (ENOMEM); 405 406 if ((kif = malloc(sizeof(*kif), PFI_MTYPE, M_NOWAIT)) == NULL) { 407 free(dyn, PFI_MTYPE); 408 return (ENOMEM); 409 } 410 411 if (!strcmp(aw->v.ifname, "self")) 412 dyn->pfid_kif = pfi_kif_attach(kif, IFG_ALL); 413 else 414 dyn->pfid_kif = pfi_kif_attach(kif, aw->v.ifname); 415 pfi_kif_ref(dyn->pfid_kif); 416 417 dyn->pfid_net = pfi_unmask(&aw->v.a.mask); 418 if (af == AF_INET && dyn->pfid_net == 32) 419 dyn->pfid_net = 128; 420 strlcpy(tblname, aw->v.ifname, sizeof(tblname)); 421 if (aw->iflags & PFI_AFLAG_NETWORK) 422 strlcat(tblname, ":network", sizeof(tblname)); 423 if (aw->iflags & PFI_AFLAG_BROADCAST) 424 strlcat(tblname, ":broadcast", sizeof(tblname)); 425 if (aw->iflags & PFI_AFLAG_PEER) 426 strlcat(tblname, ":peer", sizeof(tblname)); 427 if (aw->iflags & PFI_AFLAG_NOALIAS) 428 strlcat(tblname, ":0", sizeof(tblname)); 429 if (dyn->pfid_net != 128) 430 snprintf(tblname + strlen(tblname), 431 sizeof(tblname) - strlen(tblname), "/%d", dyn->pfid_net); 432 if ((ruleset = pf_find_or_create_ruleset(PF_RESERVED_ANCHOR)) == NULL) { 433 rv = ENOMEM; 434 goto _bad; 435 } 436 437 if ((dyn->pfid_kt = pfr_attach_table(ruleset, tblname)) == NULL) { 438 rv = ENOMEM; 439 goto _bad; 440 } 441 442 dyn->pfid_kt->pfrkt_flags |= PFR_TFLAG_ACTIVE; 443 dyn->pfid_iflags = aw->iflags; 444 dyn->pfid_af = af; 445 446 TAILQ_INSERT_TAIL(&dyn->pfid_kif->pfik_dynaddrs, dyn, entry); 447 aw->p.dyn = dyn; 448 pfi_kif_update(dyn->pfid_kif); 449 450 return (0); 451 452 _bad: 453 if (dyn->pfid_kt != NULL) 454 pfr_detach_table(dyn->pfid_kt); 455 if (ruleset != NULL) 456 pf_remove_if_empty_ruleset(ruleset); 457 if (dyn->pfid_kif != NULL) 458 pfi_kif_unref(dyn->pfid_kif); 459 free(dyn, PFI_MTYPE); 460 461 return (rv); 462 } 463 464 static void 465 pfi_kif_update(struct pfi_kif *kif) 466 { 467 struct ifg_list *ifgl; 468 struct pfi_dynaddr *p; 469 470 PF_RULES_WASSERT(); 471 472 /* update all dynaddr */ 473 TAILQ_FOREACH(p, &kif->pfik_dynaddrs, entry) 474 pfi_dynaddr_update(p); 475 476 /* again for all groups kif is member of */ 477 if (kif->pfik_ifp != NULL) { 478 struct epoch_tracker et; 479 480 NET_EPOCH_ENTER(et); 481 CK_STAILQ_FOREACH(ifgl, &kif->pfik_ifp->if_groups, ifgl_next) 482 pfi_kif_update((struct pfi_kif *) 483 ifgl->ifgl_group->ifg_pf_kif); 484 NET_EPOCH_EXIT(et); 485 } 486 } 487 488 static void 489 pfi_dynaddr_update(struct pfi_dynaddr *dyn) 490 { 491 struct pfi_kif *kif; 492 struct pfr_ktable *kt; 493 494 PF_RULES_WASSERT(); 495 KASSERT(dyn && dyn->pfid_kif && dyn->pfid_kt, 496 ("%s: bad argument", __func__)); 497 498 kif = dyn->pfid_kif; 499 kt = dyn->pfid_kt; 500 501 if (kt->pfrkt_larg != V_pfi_update) { 502 /* this table needs to be brought up-to-date */ 503 pfi_table_update(kt, kif, dyn->pfid_net, dyn->pfid_iflags); 504 kt->pfrkt_larg = V_pfi_update; 505 } 506 pfr_dynaddr_update(kt, dyn); 507 } 508 509 static void 510 pfi_table_update(struct pfr_ktable *kt, struct pfi_kif *kif, int net, int flags) 511 { 512 int e, size2 = 0; 513 struct ifg_member *ifgm; 514 515 V_pfi_buffer_cnt = 0; 516 517 if (kif->pfik_ifp != NULL) 518 pfi_instance_add(kif->pfik_ifp, net, flags); 519 else if (kif->pfik_group != NULL) { 520 struct epoch_tracker et; 521 522 NET_EPOCH_ENTER(et); 523 CK_STAILQ_FOREACH(ifgm, &kif->pfik_group->ifg_members, ifgm_next) 524 pfi_instance_add(ifgm->ifgm_ifp, net, flags); 525 NET_EPOCH_EXIT(et); 526 } 527 528 if ((e = pfr_set_addrs(&kt->pfrkt_t, V_pfi_buffer, V_pfi_buffer_cnt, &size2, 529 NULL, NULL, NULL, 0, PFR_TFLAG_ALLMASK))) 530 printf("%s: cannot set %d new addresses into table %s: %d\n", 531 __func__, V_pfi_buffer_cnt, kt->pfrkt_name, e); 532 } 533 534 static void 535 pfi_instance_add(struct ifnet *ifp, int net, int flags) 536 { 537 struct epoch_tracker et; 538 struct ifaddr *ia; 539 int got4 = 0, got6 = 0; 540 int net2, af; 541 542 NET_EPOCH_ENTER(et); 543 CK_STAILQ_FOREACH(ia, &ifp->if_addrhead, ifa_link) { 544 if (ia->ifa_addr == NULL) 545 continue; 546 af = ia->ifa_addr->sa_family; 547 if (af != AF_INET && af != AF_INET6) 548 continue; 549 /* 550 * XXX: For point-to-point interfaces, (ifname:0) and IPv4, 551 * jump over addresses without a proper route to work 552 * around a problem with ppp not fully removing the 553 * address used during IPCP. 554 */ 555 if ((ifp->if_flags & IFF_POINTOPOINT) && 556 !(ia->ifa_flags & IFA_ROUTE) && 557 (flags & PFI_AFLAG_NOALIAS) && (af == AF_INET)) 558 continue; 559 if ((flags & PFI_AFLAG_BROADCAST) && af == AF_INET6) 560 continue; 561 if ((flags & PFI_AFLAG_BROADCAST) && 562 !(ifp->if_flags & IFF_BROADCAST)) 563 continue; 564 if ((flags & PFI_AFLAG_PEER) && 565 !(ifp->if_flags & IFF_POINTOPOINT)) 566 continue; 567 if ((flags & (PFI_AFLAG_NETWORK | PFI_AFLAG_NOALIAS)) && 568 af == AF_INET6 && 569 IN6_IS_ADDR_LINKLOCAL( 570 &((struct sockaddr_in6 *)ia->ifa_addr)->sin6_addr)) 571 continue; 572 if (flags & PFI_AFLAG_NOALIAS) { 573 if (af == AF_INET && got4) 574 continue; 575 if (af == AF_INET6 && got6) 576 continue; 577 } 578 if (af == AF_INET) 579 got4 = 1; 580 else if (af == AF_INET6) 581 got6 = 1; 582 net2 = net; 583 if (net2 == 128 && (flags & PFI_AFLAG_NETWORK)) { 584 if (af == AF_INET) 585 net2 = pfi_unmask(&((struct sockaddr_in *) 586 ia->ifa_netmask)->sin_addr); 587 else if (af == AF_INET6) 588 net2 = pfi_unmask(&((struct sockaddr_in6 *) 589 ia->ifa_netmask)->sin6_addr); 590 } 591 if (af == AF_INET && net2 > 32) 592 net2 = 32; 593 if (flags & PFI_AFLAG_BROADCAST) 594 pfi_address_add(ia->ifa_broadaddr, af, net2); 595 else if (flags & PFI_AFLAG_PEER) 596 pfi_address_add(ia->ifa_dstaddr, af, net2); 597 else 598 pfi_address_add(ia->ifa_addr, af, net2); 599 } 600 NET_EPOCH_EXIT(et); 601 } 602 603 static void 604 pfi_address_add(struct sockaddr *sa, int af, int net) 605 { 606 struct pfr_addr *p; 607 int i; 608 609 if (V_pfi_buffer_cnt >= V_pfi_buffer_max) { 610 int new_max = V_pfi_buffer_max * 2; 611 612 if (new_max > PFI_BUFFER_MAX) { 613 printf("%s: address buffer full (%d/%d)\n", __func__, 614 V_pfi_buffer_cnt, PFI_BUFFER_MAX); 615 return; 616 } 617 p = malloc(new_max * sizeof(*V_pfi_buffer), PFI_MTYPE, 618 M_NOWAIT); 619 if (p == NULL) { 620 printf("%s: no memory to grow buffer (%d/%d)\n", 621 __func__, V_pfi_buffer_cnt, PFI_BUFFER_MAX); 622 return; 623 } 624 memcpy(p, V_pfi_buffer, V_pfi_buffer_max * sizeof(*V_pfi_buffer)); 625 /* no need to zero buffer */ 626 free(V_pfi_buffer, PFI_MTYPE); 627 V_pfi_buffer = p; 628 V_pfi_buffer_max = new_max; 629 } 630 if (af == AF_INET && net > 32) 631 net = 128; 632 p = V_pfi_buffer + V_pfi_buffer_cnt++; 633 bzero(p, sizeof(*p)); 634 p->pfra_af = af; 635 p->pfra_net = net; 636 if (af == AF_INET) 637 p->pfra_ip4addr = ((struct sockaddr_in *)sa)->sin_addr; 638 else if (af == AF_INET6) { 639 p->pfra_ip6addr = ((struct sockaddr_in6 *)sa)->sin6_addr; 640 if (IN6_IS_SCOPE_EMBED(&p->pfra_ip6addr)) 641 p->pfra_ip6addr.s6_addr16[1] = 0; 642 } 643 /* mask network address bits */ 644 if (net < 128) 645 ((caddr_t)p)[p->pfra_net/8] &= ~(0xFF >> (p->pfra_net%8)); 646 for (i = (p->pfra_net+7)/8; i < sizeof(p->pfra_u); i++) 647 ((caddr_t)p)[i] = 0; 648 } 649 650 void 651 pfi_dynaddr_remove(struct pfi_dynaddr *dyn) 652 { 653 654 KASSERT(dyn->pfid_kif != NULL, ("%s: null pfid_kif", __func__)); 655 KASSERT(dyn->pfid_kt != NULL, ("%s: null pfid_kt", __func__)); 656 657 TAILQ_REMOVE(&dyn->pfid_kif->pfik_dynaddrs, dyn, entry); 658 pfi_kif_unref(dyn->pfid_kif); 659 pfr_detach_table(dyn->pfid_kt); 660 free(dyn, PFI_MTYPE); 661 } 662 663 void 664 pfi_dynaddr_copyout(struct pf_addr_wrap *aw) 665 { 666 667 KASSERT(aw->type == PF_ADDR_DYNIFTL, 668 ("%s: type %u", __func__, aw->type)); 669 670 if (aw->p.dyn == NULL || aw->p.dyn->pfid_kif == NULL) 671 return; 672 aw->p.dyncnt = aw->p.dyn->pfid_acnt4 + aw->p.dyn->pfid_acnt6; 673 } 674 675 static int 676 pfi_if_compare(struct pfi_kif *p, struct pfi_kif *q) 677 { 678 return (strncmp(p->pfik_name, q->pfik_name, IFNAMSIZ)); 679 } 680 681 void 682 pfi_update_status(const char *name, struct pf_status *pfs) 683 { 684 struct pfi_kif *p; 685 struct pfi_kif_cmp key; 686 struct ifg_member p_member, *ifgm; 687 CK_STAILQ_HEAD(, ifg_member) ifg_members; 688 int i, j, k; 689 690 strlcpy(key.pfik_name, name, sizeof(key.pfik_name)); 691 p = RB_FIND(pfi_ifhead, &V_pfi_ifs, (struct pfi_kif *)&key); 692 if (p == NULL) 693 return; 694 695 if (p->pfik_group != NULL) { 696 bcopy(&p->pfik_group->ifg_members, &ifg_members, 697 sizeof(ifg_members)); 698 } else { 699 /* build a temporary list for p only */ 700 bzero(&p_member, sizeof(p_member)); 701 p_member.ifgm_ifp = p->pfik_ifp; 702 CK_STAILQ_INIT(&ifg_members); 703 CK_STAILQ_INSERT_TAIL(&ifg_members, &p_member, ifgm_next); 704 } 705 if (pfs) { 706 bzero(pfs->pcounters, sizeof(pfs->pcounters)); 707 bzero(pfs->bcounters, sizeof(pfs->bcounters)); 708 } 709 CK_STAILQ_FOREACH(ifgm, &ifg_members, ifgm_next) { 710 if (ifgm->ifgm_ifp == NULL || ifgm->ifgm_ifp->if_pf_kif == NULL) 711 continue; 712 p = (struct pfi_kif *)ifgm->ifgm_ifp->if_pf_kif; 713 714 /* just clear statistics */ 715 if (pfs == NULL) { 716 bzero(p->pfik_packets, sizeof(p->pfik_packets)); 717 bzero(p->pfik_bytes, sizeof(p->pfik_bytes)); 718 p->pfik_tzero = time_second; 719 continue; 720 } 721 for (i = 0; i < 2; i++) 722 for (j = 0; j < 2; j++) 723 for (k = 0; k < 2; k++) { 724 pfs->pcounters[i][j][k] += 725 p->pfik_packets[i][j][k]; 726 pfs->bcounters[i][j] += 727 p->pfik_bytes[i][j][k]; 728 } 729 } 730 } 731 732 void 733 pfi_get_ifaces(const char *name, struct pfi_kif *buf, int *size) 734 { 735 struct pfi_kif *p, *nextp; 736 int n = 0; 737 738 for (p = RB_MIN(pfi_ifhead, &V_pfi_ifs); p; p = nextp) { 739 nextp = RB_NEXT(pfi_ifhead, &V_pfi_ifs, p); 740 if (pfi_skip_if(name, p)) 741 continue; 742 if (*size <= n++) 743 break; 744 if (!p->pfik_tzero) 745 p->pfik_tzero = time_second; 746 bcopy(p, buf++, sizeof(*buf)); 747 nextp = RB_NEXT(pfi_ifhead, &V_pfi_ifs, p); 748 } 749 *size = n; 750 } 751 752 static int 753 pfi_skip_if(const char *filter, struct pfi_kif *p) 754 { 755 struct ifg_list *i; 756 int n; 757 758 if (filter == NULL || !*filter) 759 return (0); 760 if (!strcmp(p->pfik_name, filter)) 761 return (0); /* exact match */ 762 n = strlen(filter); 763 if (n < 1 || n >= IFNAMSIZ) 764 return (1); /* sanity check */ 765 if (filter[n-1] >= '0' && filter[n-1] <= '9') 766 return (1); /* group names may not end in a digit */ 767 if (p->pfik_ifp != NULL) { 768 struct epoch_tracker et; 769 770 NET_EPOCH_ENTER(et); 771 CK_STAILQ_FOREACH(i, &p->pfik_ifp->if_groups, ifgl_next) { 772 if (!strncmp(i->ifgl_group->ifg_group, filter, 773 IFNAMSIZ)) { 774 NET_EPOCH_EXIT(et); 775 return (0); /* iface is in group "filter" */ 776 } 777 } 778 NET_EPOCH_EXIT(et); 779 } 780 return (1); 781 } 782 783 int 784 pfi_set_flags(const char *name, int flags) 785 { 786 struct pfi_kif *p; 787 788 RB_FOREACH(p, pfi_ifhead, &V_pfi_ifs) { 789 if (pfi_skip_if(name, p)) 790 continue; 791 p->pfik_flags |= flags; 792 } 793 return (0); 794 } 795 796 int 797 pfi_clear_flags(const char *name, int flags) 798 { 799 struct pfi_kif *p; 800 801 RB_FOREACH(p, pfi_ifhead, &V_pfi_ifs) { 802 if (pfi_skip_if(name, p)) 803 continue; 804 p->pfik_flags &= ~flags; 805 } 806 return (0); 807 } 808 809 /* from pf_print_state.c */ 810 static int 811 pfi_unmask(void *addr) 812 { 813 struct pf_addr *m = addr; 814 int i = 31, j = 0, b = 0; 815 u_int32_t tmp; 816 817 while (j < 4 && m->addr32[j] == 0xffffffff) { 818 b += 32; 819 j++; 820 } 821 if (j < 4) { 822 tmp = ntohl(m->addr32[j]); 823 for (i = 31; tmp & (1 << i); --i) 824 b++; 825 } 826 return (b); 827 } 828 829 static void 830 pfi_attach_ifnet_event(void *arg __unused, struct ifnet *ifp) 831 { 832 833 if (V_pf_vnet_active == 0) { 834 /* Avoid teardown race in the least expensive way. */ 835 return; 836 } 837 pfi_attach_ifnet(ifp); 838 #ifdef ALTQ 839 PF_RULES_WLOCK(); 840 pf_altq_ifnet_event(ifp, 0); 841 PF_RULES_WUNLOCK(); 842 #endif 843 } 844 845 static void 846 pfi_detach_ifnet_event(void *arg __unused, struct ifnet *ifp) 847 { 848 struct pfi_kif *kif = (struct pfi_kif *)ifp->if_pf_kif; 849 850 if (pfsync_detach_ifnet_ptr) 851 pfsync_detach_ifnet_ptr(ifp); 852 853 if (kif == NULL) 854 return; 855 856 if (V_pf_vnet_active == 0) { 857 /* Avoid teardown race in the least expensive way. */ 858 return; 859 } 860 861 PF_RULES_WLOCK(); 862 V_pfi_update++; 863 pfi_kif_update(kif); 864 865 if (kif->pfik_ifp) 866 if_rele(kif->pfik_ifp); 867 868 kif->pfik_ifp = NULL; 869 ifp->if_pf_kif = NULL; 870 #ifdef ALTQ 871 pf_altq_ifnet_event(ifp, 1); 872 #endif 873 PF_RULES_WUNLOCK(); 874 } 875 876 static void 877 pfi_attach_group_event(void *arg __unused, struct ifg_group *ifg) 878 { 879 880 if (V_pf_vnet_active == 0) { 881 /* Avoid teardown race in the least expensive way. */ 882 return; 883 } 884 pfi_attach_ifgroup(ifg); 885 } 886 887 static void 888 pfi_change_group_event(void *arg __unused, char *gname) 889 { 890 struct pfi_kif *kif; 891 892 if (V_pf_vnet_active == 0) { 893 /* Avoid teardown race in the least expensive way. */ 894 return; 895 } 896 897 kif = malloc(sizeof(*kif), PFI_MTYPE, M_WAITOK); 898 PF_RULES_WLOCK(); 899 V_pfi_update++; 900 kif = pfi_kif_attach(kif, gname); 901 pfi_kif_update(kif); 902 PF_RULES_WUNLOCK(); 903 } 904 905 static void 906 pfi_detach_group_event(void *arg __unused, struct ifg_group *ifg) 907 { 908 struct pfi_kif *kif = (struct pfi_kif *)ifg->ifg_pf_kif; 909 910 if (kif == NULL) 911 return; 912 913 if (V_pf_vnet_active == 0) { 914 /* Avoid teardown race in the least expensive way. */ 915 return; 916 } 917 PF_RULES_WLOCK(); 918 V_pfi_update++; 919 920 kif->pfik_group = NULL; 921 ifg->ifg_pf_kif = NULL; 922 PF_RULES_WUNLOCK(); 923 } 924 925 static void 926 pfi_ifaddr_event(void *arg __unused, struct ifnet *ifp) 927 { 928 929 KASSERT(ifp, ("ifp == NULL")); 930 931 if (ifp->if_pf_kif == NULL) 932 return; 933 934 if (V_pf_vnet_active == 0) { 935 /* Avoid teardown race in the least expensive way. */ 936 return; 937 } 938 PF_RULES_WLOCK(); 939 if (ifp->if_pf_kif) { 940 V_pfi_update++; 941 pfi_kif_update(ifp->if_pf_kif); 942 } 943 PF_RULES_WUNLOCK(); 944 } 945