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 IF_ADDR_RLOCK(packet_kif->pfik_ifp); 304 CK_STAILQ_FOREACH(p, &packet_kif->pfik_ifp->if_groups, ifgl_next) 305 if (p->ifgl_group == rule_kif->pfik_group) { 306 IF_ADDR_RUNLOCK(packet_kif->pfik_ifp); 307 return (1); 308 } 309 IF_ADDR_RUNLOCK(packet_kif->pfik_ifp); 310 } 311 312 313 return (0); 314 } 315 316 static void 317 pfi_attach_ifnet(struct ifnet *ifp) 318 { 319 struct pfi_kif *kif; 320 321 kif = malloc(sizeof(*kif), PFI_MTYPE, M_WAITOK); 322 323 PF_RULES_WLOCK(); 324 V_pfi_update++; 325 kif = pfi_kif_attach(kif, ifp->if_xname); 326 327 if_ref(ifp); 328 329 kif->pfik_ifp = ifp; 330 ifp->if_pf_kif = kif; 331 332 pfi_kif_update(kif); 333 PF_RULES_WUNLOCK(); 334 } 335 336 static void 337 pfi_attach_ifgroup(struct ifg_group *ifg) 338 { 339 struct pfi_kif *kif; 340 341 kif = malloc(sizeof(*kif), PFI_MTYPE, M_WAITOK); 342 343 PF_RULES_WLOCK(); 344 V_pfi_update++; 345 kif = pfi_kif_attach(kif, ifg->ifg_group); 346 347 kif->pfik_group = ifg; 348 ifg->ifg_pf_kif = kif; 349 PF_RULES_WUNLOCK(); 350 } 351 352 int 353 pfi_match_addr(struct pfi_dynaddr *dyn, struct pf_addr *a, sa_family_t af) 354 { 355 switch (af) { 356 #ifdef INET 357 case AF_INET: 358 switch (dyn->pfid_acnt4) { 359 case 0: 360 return (0); 361 case 1: 362 return (PF_MATCHA(0, &dyn->pfid_addr4, 363 &dyn->pfid_mask4, a, AF_INET)); 364 default: 365 return (pfr_match_addr(dyn->pfid_kt, a, AF_INET)); 366 } 367 break; 368 #endif /* INET */ 369 #ifdef INET6 370 case AF_INET6: 371 switch (dyn->pfid_acnt6) { 372 case 0: 373 return (0); 374 case 1: 375 return (PF_MATCHA(0, &dyn->pfid_addr6, 376 &dyn->pfid_mask6, a, AF_INET6)); 377 default: 378 return (pfr_match_addr(dyn->pfid_kt, a, AF_INET6)); 379 } 380 break; 381 #endif /* INET6 */ 382 default: 383 return (0); 384 } 385 } 386 387 int 388 pfi_dynaddr_setup(struct pf_addr_wrap *aw, sa_family_t af) 389 { 390 struct pfi_dynaddr *dyn; 391 char tblname[PF_TABLE_NAME_SIZE]; 392 struct pf_ruleset *ruleset = NULL; 393 struct pfi_kif *kif; 394 int rv = 0; 395 396 PF_RULES_WASSERT(); 397 KASSERT(aw->type == PF_ADDR_DYNIFTL, ("%s: type %u", 398 __func__, aw->type)); 399 KASSERT(aw->p.dyn == NULL, ("%s: dyn is %p", __func__, aw->p.dyn)); 400 401 if ((dyn = malloc(sizeof(*dyn), PFI_MTYPE, M_NOWAIT | M_ZERO)) == NULL) 402 return (ENOMEM); 403 404 if ((kif = malloc(sizeof(*kif), PFI_MTYPE, M_NOWAIT)) == NULL) { 405 free(dyn, PFI_MTYPE); 406 return (ENOMEM); 407 } 408 409 if (!strcmp(aw->v.ifname, "self")) 410 dyn->pfid_kif = pfi_kif_attach(kif, IFG_ALL); 411 else 412 dyn->pfid_kif = pfi_kif_attach(kif, aw->v.ifname); 413 pfi_kif_ref(dyn->pfid_kif); 414 415 dyn->pfid_net = pfi_unmask(&aw->v.a.mask); 416 if (af == AF_INET && dyn->pfid_net == 32) 417 dyn->pfid_net = 128; 418 strlcpy(tblname, aw->v.ifname, sizeof(tblname)); 419 if (aw->iflags & PFI_AFLAG_NETWORK) 420 strlcat(tblname, ":network", sizeof(tblname)); 421 if (aw->iflags & PFI_AFLAG_BROADCAST) 422 strlcat(tblname, ":broadcast", sizeof(tblname)); 423 if (aw->iflags & PFI_AFLAG_PEER) 424 strlcat(tblname, ":peer", sizeof(tblname)); 425 if (aw->iflags & PFI_AFLAG_NOALIAS) 426 strlcat(tblname, ":0", sizeof(tblname)); 427 if (dyn->pfid_net != 128) 428 snprintf(tblname + strlen(tblname), 429 sizeof(tblname) - strlen(tblname), "/%d", dyn->pfid_net); 430 if ((ruleset = pf_find_or_create_ruleset(PF_RESERVED_ANCHOR)) == NULL) { 431 rv = ENOMEM; 432 goto _bad; 433 } 434 435 if ((dyn->pfid_kt = pfr_attach_table(ruleset, tblname)) == NULL) { 436 rv = ENOMEM; 437 goto _bad; 438 } 439 440 dyn->pfid_kt->pfrkt_flags |= PFR_TFLAG_ACTIVE; 441 dyn->pfid_iflags = aw->iflags; 442 dyn->pfid_af = af; 443 444 TAILQ_INSERT_TAIL(&dyn->pfid_kif->pfik_dynaddrs, dyn, entry); 445 aw->p.dyn = dyn; 446 pfi_kif_update(dyn->pfid_kif); 447 448 return (0); 449 450 _bad: 451 if (dyn->pfid_kt != NULL) 452 pfr_detach_table(dyn->pfid_kt); 453 if (ruleset != NULL) 454 pf_remove_if_empty_ruleset(ruleset); 455 if (dyn->pfid_kif != NULL) 456 pfi_kif_unref(dyn->pfid_kif); 457 free(dyn, PFI_MTYPE); 458 459 return (rv); 460 } 461 462 static void 463 pfi_kif_update(struct pfi_kif *kif) 464 { 465 struct ifg_list *ifgl; 466 struct pfi_dynaddr *p; 467 468 PF_RULES_WASSERT(); 469 470 /* update all dynaddr */ 471 TAILQ_FOREACH(p, &kif->pfik_dynaddrs, entry) 472 pfi_dynaddr_update(p); 473 474 /* again for all groups kif is member of */ 475 if (kif->pfik_ifp != NULL) { 476 IF_ADDR_RLOCK(kif->pfik_ifp); 477 CK_STAILQ_FOREACH(ifgl, &kif->pfik_ifp->if_groups, ifgl_next) 478 pfi_kif_update((struct pfi_kif *) 479 ifgl->ifgl_group->ifg_pf_kif); 480 IF_ADDR_RUNLOCK(kif->pfik_ifp); 481 } 482 } 483 484 static void 485 pfi_dynaddr_update(struct pfi_dynaddr *dyn) 486 { 487 struct pfi_kif *kif; 488 struct pfr_ktable *kt; 489 490 PF_RULES_WASSERT(); 491 KASSERT(dyn && dyn->pfid_kif && dyn->pfid_kt, 492 ("%s: bad argument", __func__)); 493 494 kif = dyn->pfid_kif; 495 kt = dyn->pfid_kt; 496 497 if (kt->pfrkt_larg != V_pfi_update) { 498 /* this table needs to be brought up-to-date */ 499 pfi_table_update(kt, kif, dyn->pfid_net, dyn->pfid_iflags); 500 kt->pfrkt_larg = V_pfi_update; 501 } 502 pfr_dynaddr_update(kt, dyn); 503 } 504 505 static void 506 pfi_table_update(struct pfr_ktable *kt, struct pfi_kif *kif, int net, int flags) 507 { 508 int e, size2 = 0; 509 struct ifg_member *ifgm; 510 511 V_pfi_buffer_cnt = 0; 512 513 if (kif->pfik_ifp != NULL) 514 pfi_instance_add(kif->pfik_ifp, net, flags); 515 else if (kif->pfik_group != NULL) { 516 IFNET_RLOCK_NOSLEEP(); 517 CK_STAILQ_FOREACH(ifgm, &kif->pfik_group->ifg_members, ifgm_next) 518 pfi_instance_add(ifgm->ifgm_ifp, net, flags); 519 IFNET_RUNLOCK_NOSLEEP(); 520 } 521 522 if ((e = pfr_set_addrs(&kt->pfrkt_t, V_pfi_buffer, V_pfi_buffer_cnt, &size2, 523 NULL, NULL, NULL, 0, PFR_TFLAG_ALLMASK))) 524 printf("%s: cannot set %d new addresses into table %s: %d\n", 525 __func__, V_pfi_buffer_cnt, kt->pfrkt_name, e); 526 } 527 528 static void 529 pfi_instance_add(struct ifnet *ifp, int net, int flags) 530 { 531 struct ifaddr *ia; 532 int got4 = 0, got6 = 0; 533 int net2, af; 534 535 IF_ADDR_RLOCK(ifp); 536 CK_STAILQ_FOREACH(ia, &ifp->if_addrhead, ifa_link) { 537 if (ia->ifa_addr == NULL) 538 continue; 539 af = ia->ifa_addr->sa_family; 540 if (af != AF_INET && af != AF_INET6) 541 continue; 542 /* 543 * XXX: For point-to-point interfaces, (ifname:0) and IPv4, 544 * jump over addresses without a proper route to work 545 * around a problem with ppp not fully removing the 546 * address used during IPCP. 547 */ 548 if ((ifp->if_flags & IFF_POINTOPOINT) && 549 !(ia->ifa_flags & IFA_ROUTE) && 550 (flags & PFI_AFLAG_NOALIAS) && (af == AF_INET)) 551 continue; 552 if ((flags & PFI_AFLAG_BROADCAST) && af == AF_INET6) 553 continue; 554 if ((flags & PFI_AFLAG_BROADCAST) && 555 !(ifp->if_flags & IFF_BROADCAST)) 556 continue; 557 if ((flags & PFI_AFLAG_PEER) && 558 !(ifp->if_flags & IFF_POINTOPOINT)) 559 continue; 560 if ((flags & (PFI_AFLAG_NETWORK | PFI_AFLAG_NOALIAS)) && 561 af == AF_INET6 && 562 IN6_IS_ADDR_LINKLOCAL( 563 &((struct sockaddr_in6 *)ia->ifa_addr)->sin6_addr)) 564 continue; 565 if (flags & PFI_AFLAG_NOALIAS) { 566 if (af == AF_INET && got4) 567 continue; 568 if (af == AF_INET6 && got6) 569 continue; 570 } 571 if (af == AF_INET) 572 got4 = 1; 573 else if (af == AF_INET6) 574 got6 = 1; 575 net2 = net; 576 if (net2 == 128 && (flags & PFI_AFLAG_NETWORK)) { 577 if (af == AF_INET) 578 net2 = pfi_unmask(&((struct sockaddr_in *) 579 ia->ifa_netmask)->sin_addr); 580 else if (af == AF_INET6) 581 net2 = pfi_unmask(&((struct sockaddr_in6 *) 582 ia->ifa_netmask)->sin6_addr); 583 } 584 if (af == AF_INET && net2 > 32) 585 net2 = 32; 586 if (flags & PFI_AFLAG_BROADCAST) 587 pfi_address_add(ia->ifa_broadaddr, af, net2); 588 else if (flags & PFI_AFLAG_PEER) 589 pfi_address_add(ia->ifa_dstaddr, af, net2); 590 else 591 pfi_address_add(ia->ifa_addr, af, net2); 592 } 593 IF_ADDR_RUNLOCK(ifp); 594 } 595 596 static void 597 pfi_address_add(struct sockaddr *sa, int af, int net) 598 { 599 struct pfr_addr *p; 600 int i; 601 602 if (V_pfi_buffer_cnt >= V_pfi_buffer_max) { 603 int new_max = V_pfi_buffer_max * 2; 604 605 if (new_max > PFI_BUFFER_MAX) { 606 printf("%s: address buffer full (%d/%d)\n", __func__, 607 V_pfi_buffer_cnt, PFI_BUFFER_MAX); 608 return; 609 } 610 p = malloc(new_max * sizeof(*V_pfi_buffer), PFI_MTYPE, 611 M_NOWAIT); 612 if (p == NULL) { 613 printf("%s: no memory to grow buffer (%d/%d)\n", 614 __func__, V_pfi_buffer_cnt, PFI_BUFFER_MAX); 615 return; 616 } 617 memcpy(p, V_pfi_buffer, V_pfi_buffer_max * sizeof(*V_pfi_buffer)); 618 /* no need to zero buffer */ 619 free(V_pfi_buffer, PFI_MTYPE); 620 V_pfi_buffer = p; 621 V_pfi_buffer_max = new_max; 622 } 623 if (af == AF_INET && net > 32) 624 net = 128; 625 p = V_pfi_buffer + V_pfi_buffer_cnt++; 626 bzero(p, sizeof(*p)); 627 p->pfra_af = af; 628 p->pfra_net = net; 629 if (af == AF_INET) 630 p->pfra_ip4addr = ((struct sockaddr_in *)sa)->sin_addr; 631 else if (af == AF_INET6) { 632 p->pfra_ip6addr = ((struct sockaddr_in6 *)sa)->sin6_addr; 633 if (IN6_IS_SCOPE_EMBED(&p->pfra_ip6addr)) 634 p->pfra_ip6addr.s6_addr16[1] = 0; 635 } 636 /* mask network address bits */ 637 if (net < 128) 638 ((caddr_t)p)[p->pfra_net/8] &= ~(0xFF >> (p->pfra_net%8)); 639 for (i = (p->pfra_net+7)/8; i < sizeof(p->pfra_u); i++) 640 ((caddr_t)p)[i] = 0; 641 } 642 643 void 644 pfi_dynaddr_remove(struct pfi_dynaddr *dyn) 645 { 646 647 KASSERT(dyn->pfid_kif != NULL, ("%s: null pfid_kif", __func__)); 648 KASSERT(dyn->pfid_kt != NULL, ("%s: null pfid_kt", __func__)); 649 650 TAILQ_REMOVE(&dyn->pfid_kif->pfik_dynaddrs, dyn, entry); 651 pfi_kif_unref(dyn->pfid_kif); 652 pfr_detach_table(dyn->pfid_kt); 653 free(dyn, PFI_MTYPE); 654 } 655 656 void 657 pfi_dynaddr_copyout(struct pf_addr_wrap *aw) 658 { 659 660 KASSERT(aw->type == PF_ADDR_DYNIFTL, 661 ("%s: type %u", __func__, aw->type)); 662 663 if (aw->p.dyn == NULL || aw->p.dyn->pfid_kif == NULL) 664 return; 665 aw->p.dyncnt = aw->p.dyn->pfid_acnt4 + aw->p.dyn->pfid_acnt6; 666 } 667 668 static int 669 pfi_if_compare(struct pfi_kif *p, struct pfi_kif *q) 670 { 671 return (strncmp(p->pfik_name, q->pfik_name, IFNAMSIZ)); 672 } 673 674 void 675 pfi_update_status(const char *name, struct pf_status *pfs) 676 { 677 struct pfi_kif *p; 678 struct pfi_kif_cmp key; 679 struct ifg_member p_member, *ifgm; 680 CK_STAILQ_HEAD(, ifg_member) ifg_members; 681 int i, j, k; 682 683 strlcpy(key.pfik_name, name, sizeof(key.pfik_name)); 684 p = RB_FIND(pfi_ifhead, &V_pfi_ifs, (struct pfi_kif *)&key); 685 if (p == NULL) 686 return; 687 688 if (p->pfik_group != NULL) { 689 bcopy(&p->pfik_group->ifg_members, &ifg_members, 690 sizeof(ifg_members)); 691 } else { 692 /* build a temporary list for p only */ 693 bzero(&p_member, sizeof(p_member)); 694 p_member.ifgm_ifp = p->pfik_ifp; 695 CK_STAILQ_INIT(&ifg_members); 696 CK_STAILQ_INSERT_TAIL(&ifg_members, &p_member, ifgm_next); 697 } 698 if (pfs) { 699 bzero(pfs->pcounters, sizeof(pfs->pcounters)); 700 bzero(pfs->bcounters, sizeof(pfs->bcounters)); 701 } 702 CK_STAILQ_FOREACH(ifgm, &ifg_members, ifgm_next) { 703 if (ifgm->ifgm_ifp == NULL || ifgm->ifgm_ifp->if_pf_kif == NULL) 704 continue; 705 p = (struct pfi_kif *)ifgm->ifgm_ifp->if_pf_kif; 706 707 /* just clear statistics */ 708 if (pfs == NULL) { 709 bzero(p->pfik_packets, sizeof(p->pfik_packets)); 710 bzero(p->pfik_bytes, sizeof(p->pfik_bytes)); 711 p->pfik_tzero = time_second; 712 continue; 713 } 714 for (i = 0; i < 2; i++) 715 for (j = 0; j < 2; j++) 716 for (k = 0; k < 2; k++) { 717 pfs->pcounters[i][j][k] += 718 p->pfik_packets[i][j][k]; 719 pfs->bcounters[i][j] += 720 p->pfik_bytes[i][j][k]; 721 } 722 } 723 } 724 725 void 726 pfi_get_ifaces(const char *name, struct pfi_kif *buf, int *size) 727 { 728 struct pfi_kif *p, *nextp; 729 int n = 0; 730 731 for (p = RB_MIN(pfi_ifhead, &V_pfi_ifs); p; p = nextp) { 732 nextp = RB_NEXT(pfi_ifhead, &V_pfi_ifs, p); 733 if (pfi_skip_if(name, p)) 734 continue; 735 if (*size <= n++) 736 break; 737 if (!p->pfik_tzero) 738 p->pfik_tzero = time_second; 739 bcopy(p, buf++, sizeof(*buf)); 740 nextp = RB_NEXT(pfi_ifhead, &V_pfi_ifs, p); 741 } 742 *size = n; 743 } 744 745 static int 746 pfi_skip_if(const char *filter, struct pfi_kif *p) 747 { 748 struct ifg_list *i; 749 int n; 750 751 if (filter == NULL || !*filter) 752 return (0); 753 if (!strcmp(p->pfik_name, filter)) 754 return (0); /* exact match */ 755 n = strlen(filter); 756 if (n < 1 || n >= IFNAMSIZ) 757 return (1); /* sanity check */ 758 if (filter[n-1] >= '0' && filter[n-1] <= '9') 759 return (1); /* group names may not end in a digit */ 760 if (p->pfik_ifp != NULL) { 761 IF_ADDR_RLOCK(p->pfik_ifp); 762 CK_STAILQ_FOREACH(i, &p->pfik_ifp->if_groups, ifgl_next) { 763 if (!strncmp(i->ifgl_group->ifg_group, filter, 764 IFNAMSIZ)) { 765 IF_ADDR_RUNLOCK(p->pfik_ifp); 766 return (0); /* iface is in group "filter" */ 767 } 768 } 769 IF_ADDR_RUNLOCK(p->pfik_ifp); 770 } 771 return (1); 772 } 773 774 int 775 pfi_set_flags(const char *name, int flags) 776 { 777 struct pfi_kif *p; 778 779 RB_FOREACH(p, pfi_ifhead, &V_pfi_ifs) { 780 if (pfi_skip_if(name, p)) 781 continue; 782 p->pfik_flags |= flags; 783 } 784 return (0); 785 } 786 787 int 788 pfi_clear_flags(const char *name, int flags) 789 { 790 struct pfi_kif *p; 791 792 RB_FOREACH(p, pfi_ifhead, &V_pfi_ifs) { 793 if (pfi_skip_if(name, p)) 794 continue; 795 p->pfik_flags &= ~flags; 796 } 797 return (0); 798 } 799 800 /* from pf_print_state.c */ 801 static int 802 pfi_unmask(void *addr) 803 { 804 struct pf_addr *m = addr; 805 int i = 31, j = 0, b = 0; 806 u_int32_t tmp; 807 808 while (j < 4 && m->addr32[j] == 0xffffffff) { 809 b += 32; 810 j++; 811 } 812 if (j < 4) { 813 tmp = ntohl(m->addr32[j]); 814 for (i = 31; tmp & (1 << i); --i) 815 b++; 816 } 817 return (b); 818 } 819 820 static void 821 pfi_attach_ifnet_event(void *arg __unused, struct ifnet *ifp) 822 { 823 824 if (V_pf_vnet_active == 0) { 825 /* Avoid teardown race in the least expensive way. */ 826 return; 827 } 828 pfi_attach_ifnet(ifp); 829 #ifdef ALTQ 830 PF_RULES_WLOCK(); 831 pf_altq_ifnet_event(ifp, 0); 832 PF_RULES_WUNLOCK(); 833 #endif 834 } 835 836 static void 837 pfi_detach_ifnet_event(void *arg __unused, struct ifnet *ifp) 838 { 839 struct pfi_kif *kif = (struct pfi_kif *)ifp->if_pf_kif; 840 841 if (pfsync_detach_ifnet_ptr) 842 pfsync_detach_ifnet_ptr(ifp); 843 844 if (kif == NULL) 845 return; 846 847 if (V_pf_vnet_active == 0) { 848 /* Avoid teardown race in the least expensive way. */ 849 return; 850 } 851 852 PF_RULES_WLOCK(); 853 V_pfi_update++; 854 pfi_kif_update(kif); 855 856 if (kif->pfik_ifp) 857 if_rele(kif->pfik_ifp); 858 859 kif->pfik_ifp = NULL; 860 ifp->if_pf_kif = NULL; 861 #ifdef ALTQ 862 pf_altq_ifnet_event(ifp, 1); 863 #endif 864 PF_RULES_WUNLOCK(); 865 } 866 867 static void 868 pfi_attach_group_event(void *arg __unused, struct ifg_group *ifg) 869 { 870 871 if (V_pf_vnet_active == 0) { 872 /* Avoid teardown race in the least expensive way. */ 873 return; 874 } 875 pfi_attach_ifgroup(ifg); 876 } 877 878 static void 879 pfi_change_group_event(void *arg __unused, char *gname) 880 { 881 struct pfi_kif *kif; 882 883 if (V_pf_vnet_active == 0) { 884 /* Avoid teardown race in the least expensive way. */ 885 return; 886 } 887 888 kif = malloc(sizeof(*kif), PFI_MTYPE, M_WAITOK); 889 PF_RULES_WLOCK(); 890 V_pfi_update++; 891 kif = pfi_kif_attach(kif, gname); 892 pfi_kif_update(kif); 893 PF_RULES_WUNLOCK(); 894 } 895 896 static void 897 pfi_detach_group_event(void *arg __unused, struct ifg_group *ifg) 898 { 899 struct pfi_kif *kif = (struct pfi_kif *)ifg->ifg_pf_kif; 900 901 if (kif == NULL) 902 return; 903 904 if (V_pf_vnet_active == 0) { 905 /* Avoid teardown race in the least expensive way. */ 906 return; 907 } 908 PF_RULES_WLOCK(); 909 V_pfi_update++; 910 911 kif->pfik_group = NULL; 912 ifg->ifg_pf_kif = NULL; 913 PF_RULES_WUNLOCK(); 914 } 915 916 static void 917 pfi_ifaddr_event(void *arg __unused, struct ifnet *ifp) 918 { 919 920 KASSERT(ifp, ("ifp == NULL")); 921 922 if (ifp->if_pf_kif == NULL) 923 return; 924 925 if (V_pf_vnet_active == 0) { 926 /* Avoid teardown race in the least expensive way. */ 927 return; 928 } 929 PF_RULES_WLOCK(); 930 if (ifp->if_pf_kif) { 931 V_pfi_update++; 932 pfi_kif_update(ifp->if_pf_kif); 933 } 934 PF_RULES_WUNLOCK(); 935 } 936