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 *, struct pfi_kif *); 80 static void pfi_attach_ifgroup(struct ifg_group *, struct pfi_kif *); 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 pfi_list kifs = LIST_HEAD_INITIALIZER(); 118 struct epoch_tracker et; 119 struct pfi_kif *kif; 120 struct ifg_group *ifg; 121 struct ifnet *ifp; 122 int nkifs; 123 124 V_pfi_buffer_max = 64; 125 V_pfi_buffer = malloc(V_pfi_buffer_max * sizeof(*V_pfi_buffer), 126 PFI_MTYPE, M_WAITOK); 127 128 nkifs = 1; /* one for V_pfi_all */ 129 IFNET_RLOCK(); 130 CK_STAILQ_FOREACH(ifg, &V_ifg_head, ifg_next) 131 nkifs++; 132 CK_STAILQ_FOREACH(ifp, &V_ifnet, if_link) 133 nkifs++; 134 135 for (int n = 0; n < nkifs; n++) { 136 kif = malloc(sizeof(*kif), PFI_MTYPE, M_WAITOK); 137 LIST_INSERT_HEAD(&kifs, kif, pfik_list); 138 } 139 140 NET_EPOCH_ENTER(et); 141 PF_RULES_WLOCK(); 142 kif = LIST_FIRST(&kifs); 143 LIST_REMOVE(kif, pfik_list); 144 V_pfi_all = pfi_kif_attach(kif, IFG_ALL); 145 CK_STAILQ_FOREACH(ifg, &V_ifg_head, ifg_next) { 146 kif = LIST_FIRST(&kifs); 147 LIST_REMOVE(kif, pfik_list); 148 pfi_attach_ifgroup(ifg, kif); 149 } 150 CK_STAILQ_FOREACH(ifp, &V_ifnet, if_link) { 151 kif = LIST_FIRST(&kifs); 152 LIST_REMOVE(kif, pfik_list); 153 pfi_attach_ifnet(ifp, kif); 154 } 155 PF_RULES_WUNLOCK(); 156 NET_EPOCH_EXIT(et); 157 IFNET_RUNLOCK(); 158 159 MPASS(LIST_EMPTY(&kifs)); 160 } 161 162 void 163 pfi_initialize(void) 164 { 165 166 pfi_attach_cookie = EVENTHANDLER_REGISTER(ifnet_arrival_event, 167 pfi_attach_ifnet_event, NULL, EVENTHANDLER_PRI_ANY); 168 pfi_detach_cookie = EVENTHANDLER_REGISTER(ifnet_departure_event, 169 pfi_detach_ifnet_event, NULL, EVENTHANDLER_PRI_ANY); 170 pfi_attach_group_cookie = EVENTHANDLER_REGISTER(group_attach_event, 171 pfi_attach_group_event, NULL, EVENTHANDLER_PRI_ANY); 172 pfi_change_group_cookie = EVENTHANDLER_REGISTER(group_change_event, 173 pfi_change_group_event, NULL, EVENTHANDLER_PRI_ANY); 174 pfi_detach_group_cookie = EVENTHANDLER_REGISTER(group_detach_event, 175 pfi_detach_group_event, NULL, EVENTHANDLER_PRI_ANY); 176 pfi_ifaddr_event_cookie = EVENTHANDLER_REGISTER(ifaddr_event, 177 pfi_ifaddr_event, NULL, EVENTHANDLER_PRI_ANY); 178 } 179 180 void 181 pfi_cleanup_vnet(void) 182 { 183 struct pfi_kif *kif; 184 185 PF_RULES_WASSERT(); 186 187 V_pfi_all = NULL; 188 while ((kif = RB_MIN(pfi_ifhead, &V_pfi_ifs))) { 189 RB_REMOVE(pfi_ifhead, &V_pfi_ifs, kif); 190 if (kif->pfik_group) 191 kif->pfik_group->ifg_pf_kif = NULL; 192 if (kif->pfik_ifp) { 193 if_rele(kif->pfik_ifp); 194 kif->pfik_ifp->if_pf_kif = NULL; 195 } 196 free(kif, PFI_MTYPE); 197 } 198 199 mtx_lock(&pfi_unlnkdkifs_mtx); 200 while ((kif = LIST_FIRST(&V_pfi_unlinked_kifs))) { 201 LIST_REMOVE(kif, pfik_list); 202 free(kif, PFI_MTYPE); 203 } 204 mtx_unlock(&pfi_unlnkdkifs_mtx); 205 206 free(V_pfi_buffer, PFI_MTYPE); 207 } 208 209 void 210 pfi_cleanup(void) 211 { 212 213 EVENTHANDLER_DEREGISTER(ifnet_arrival_event, pfi_attach_cookie); 214 EVENTHANDLER_DEREGISTER(ifnet_departure_event, pfi_detach_cookie); 215 EVENTHANDLER_DEREGISTER(group_attach_event, pfi_attach_group_cookie); 216 EVENTHANDLER_DEREGISTER(group_change_event, pfi_change_group_cookie); 217 EVENTHANDLER_DEREGISTER(group_detach_event, pfi_detach_group_cookie); 218 EVENTHANDLER_DEREGISTER(ifaddr_event, pfi_ifaddr_event_cookie); 219 } 220 221 struct pfi_kif * 222 pfi_kif_find(const char *kif_name) 223 { 224 struct pfi_kif_cmp s; 225 226 PF_RULES_ASSERT(); 227 228 bzero(&s, sizeof(s)); 229 strlcpy(s.pfik_name, kif_name, sizeof(s.pfik_name)); 230 231 return (RB_FIND(pfi_ifhead, &V_pfi_ifs, (struct pfi_kif *)&s)); 232 } 233 234 struct pfi_kif * 235 pfi_kif_attach(struct pfi_kif *kif, const char *kif_name) 236 { 237 struct pfi_kif *kif1; 238 239 PF_RULES_WASSERT(); 240 KASSERT(kif != NULL, ("%s: null kif", __func__)); 241 242 kif1 = pfi_kif_find(kif_name); 243 if (kif1 != NULL) { 244 free(kif, PFI_MTYPE); 245 return (kif1); 246 } 247 248 bzero(kif, sizeof(*kif)); 249 strlcpy(kif->pfik_name, kif_name, sizeof(kif->pfik_name)); 250 /* 251 * It seems that the value of time_second is in unintialzied state 252 * when pf sets interface statistics clear time in boot phase if pf 253 * was statically linked to kernel. Instead of setting the bogus 254 * time value have pfi_get_ifaces handle this case. In 255 * pfi_get_ifaces it uses time_second if it sees the time is 0. 256 */ 257 kif->pfik_tzero = time_second > 1 ? time_second : 0; 258 TAILQ_INIT(&kif->pfik_dynaddrs); 259 260 RB_INSERT(pfi_ifhead, &V_pfi_ifs, kif); 261 262 return (kif); 263 } 264 265 void 266 pfi_kif_ref(struct pfi_kif *kif) 267 { 268 269 PF_RULES_WASSERT(); 270 kif->pfik_rulerefs++; 271 } 272 273 void 274 pfi_kif_unref(struct pfi_kif *kif) 275 { 276 277 PF_RULES_WASSERT(); 278 KASSERT(kif->pfik_rulerefs > 0, ("%s: %p has zero refs", __func__, kif)); 279 280 kif->pfik_rulerefs--; 281 282 if (kif->pfik_rulerefs > 0) 283 return; 284 285 /* kif referencing an existing ifnet or group should exist. */ 286 if (kif->pfik_ifp != NULL || kif->pfik_group != NULL || kif == V_pfi_all) 287 return; 288 289 RB_REMOVE(pfi_ifhead, &V_pfi_ifs, kif); 290 291 kif->pfik_flags |= PFI_IFLAG_REFS; 292 293 mtx_lock(&pfi_unlnkdkifs_mtx); 294 LIST_INSERT_HEAD(&V_pfi_unlinked_kifs, kif, pfik_list); 295 mtx_unlock(&pfi_unlnkdkifs_mtx); 296 } 297 298 void 299 pfi_kif_purge(void) 300 { 301 struct pfi_kif *kif, *kif1; 302 303 /* 304 * Do naive mark-and-sweep garbage collecting of old kifs. 305 * Reference flag is raised by pf_purge_expired_states(). 306 */ 307 mtx_lock(&pfi_unlnkdkifs_mtx); 308 LIST_FOREACH_SAFE(kif, &V_pfi_unlinked_kifs, pfik_list, kif1) { 309 if (!(kif->pfik_flags & PFI_IFLAG_REFS)) { 310 LIST_REMOVE(kif, pfik_list); 311 free(kif, PFI_MTYPE); 312 } else 313 kif->pfik_flags &= ~PFI_IFLAG_REFS; 314 } 315 mtx_unlock(&pfi_unlnkdkifs_mtx); 316 } 317 318 int 319 pfi_kif_match(struct pfi_kif *rule_kif, struct pfi_kif *packet_kif) 320 { 321 struct ifg_list *p; 322 323 NET_EPOCH_ASSERT(); 324 325 if (rule_kif == NULL || rule_kif == packet_kif) 326 return (1); 327 328 if (rule_kif->pfik_group != NULL) { 329 CK_STAILQ_FOREACH(p, &packet_kif->pfik_ifp->if_groups, ifgl_next) 330 if (p->ifgl_group == rule_kif->pfik_group) 331 return (1); 332 } 333 334 return (0); 335 } 336 337 static void 338 pfi_attach_ifnet(struct ifnet *ifp, struct pfi_kif *kif) 339 { 340 341 PF_RULES_WASSERT(); 342 343 V_pfi_update++; 344 kif = pfi_kif_attach(kif, ifp->if_xname); 345 if_ref(ifp); 346 kif->pfik_ifp = ifp; 347 ifp->if_pf_kif = kif; 348 pfi_kif_update(kif); 349 } 350 351 static void 352 pfi_attach_ifgroup(struct ifg_group *ifg, struct pfi_kif *kif) 353 { 354 355 PF_RULES_WASSERT(); 356 357 V_pfi_update++; 358 kif = pfi_kif_attach(kif, ifg->ifg_group); 359 kif->pfik_group = ifg; 360 ifg->ifg_pf_kif = kif; 361 } 362 363 int 364 pfi_match_addr(struct pfi_dynaddr *dyn, struct pf_addr *a, sa_family_t af) 365 { 366 switch (af) { 367 #ifdef INET 368 case AF_INET: 369 switch (dyn->pfid_acnt4) { 370 case 0: 371 return (0); 372 case 1: 373 return (PF_MATCHA(0, &dyn->pfid_addr4, 374 &dyn->pfid_mask4, a, AF_INET)); 375 default: 376 return (pfr_match_addr(dyn->pfid_kt, a, AF_INET)); 377 } 378 break; 379 #endif /* INET */ 380 #ifdef INET6 381 case AF_INET6: 382 switch (dyn->pfid_acnt6) { 383 case 0: 384 return (0); 385 case 1: 386 return (PF_MATCHA(0, &dyn->pfid_addr6, 387 &dyn->pfid_mask6, a, AF_INET6)); 388 default: 389 return (pfr_match_addr(dyn->pfid_kt, a, AF_INET6)); 390 } 391 break; 392 #endif /* INET6 */ 393 default: 394 return (0); 395 } 396 } 397 398 int 399 pfi_dynaddr_setup(struct pf_addr_wrap *aw, sa_family_t af) 400 { 401 struct epoch_tracker et; 402 struct pfi_dynaddr *dyn; 403 char tblname[PF_TABLE_NAME_SIZE]; 404 struct pf_ruleset *ruleset = NULL; 405 struct pfi_kif *kif; 406 int rv = 0; 407 408 PF_RULES_WASSERT(); 409 KASSERT(aw->type == PF_ADDR_DYNIFTL, ("%s: type %u", 410 __func__, aw->type)); 411 KASSERT(aw->p.dyn == NULL, ("%s: dyn is %p", __func__, aw->p.dyn)); 412 413 if ((dyn = malloc(sizeof(*dyn), PFI_MTYPE, M_NOWAIT | M_ZERO)) == NULL) 414 return (ENOMEM); 415 416 if ((kif = malloc(sizeof(*kif), PFI_MTYPE, M_NOWAIT)) == NULL) { 417 free(dyn, PFI_MTYPE); 418 return (ENOMEM); 419 } 420 421 if (!strcmp(aw->v.ifname, "self")) 422 dyn->pfid_kif = pfi_kif_attach(kif, IFG_ALL); 423 else 424 dyn->pfid_kif = pfi_kif_attach(kif, aw->v.ifname); 425 pfi_kif_ref(dyn->pfid_kif); 426 427 dyn->pfid_net = pfi_unmask(&aw->v.a.mask); 428 if (af == AF_INET && dyn->pfid_net == 32) 429 dyn->pfid_net = 128; 430 strlcpy(tblname, aw->v.ifname, sizeof(tblname)); 431 if (aw->iflags & PFI_AFLAG_NETWORK) 432 strlcat(tblname, ":network", sizeof(tblname)); 433 if (aw->iflags & PFI_AFLAG_BROADCAST) 434 strlcat(tblname, ":broadcast", sizeof(tblname)); 435 if (aw->iflags & PFI_AFLAG_PEER) 436 strlcat(tblname, ":peer", sizeof(tblname)); 437 if (aw->iflags & PFI_AFLAG_NOALIAS) 438 strlcat(tblname, ":0", sizeof(tblname)); 439 if (dyn->pfid_net != 128) 440 snprintf(tblname + strlen(tblname), 441 sizeof(tblname) - strlen(tblname), "/%d", dyn->pfid_net); 442 if ((ruleset = pf_find_or_create_ruleset(PF_RESERVED_ANCHOR)) == NULL) { 443 rv = ENOMEM; 444 goto _bad; 445 } 446 447 if ((dyn->pfid_kt = pfr_attach_table(ruleset, tblname)) == NULL) { 448 rv = ENOMEM; 449 goto _bad; 450 } 451 452 dyn->pfid_kt->pfrkt_flags |= PFR_TFLAG_ACTIVE; 453 dyn->pfid_iflags = aw->iflags; 454 dyn->pfid_af = af; 455 456 TAILQ_INSERT_TAIL(&dyn->pfid_kif->pfik_dynaddrs, dyn, entry); 457 aw->p.dyn = dyn; 458 NET_EPOCH_ENTER(et); 459 pfi_kif_update(dyn->pfid_kif); 460 NET_EPOCH_EXIT(et); 461 462 return (0); 463 464 _bad: 465 if (dyn->pfid_kt != NULL) 466 pfr_detach_table(dyn->pfid_kt); 467 if (ruleset != NULL) 468 pf_remove_if_empty_ruleset(ruleset); 469 if (dyn->pfid_kif != NULL) 470 pfi_kif_unref(dyn->pfid_kif); 471 free(dyn, PFI_MTYPE); 472 473 return (rv); 474 } 475 476 static void 477 pfi_kif_update(struct pfi_kif *kif) 478 { 479 struct ifg_list *ifgl; 480 struct ifg_member *ifgm; 481 struct pfi_dynaddr *p; 482 struct pfi_kif *tmpkif; 483 484 NET_EPOCH_ASSERT(); 485 PF_RULES_WASSERT(); 486 487 /* update all dynaddr */ 488 TAILQ_FOREACH(p, &kif->pfik_dynaddrs, entry) 489 pfi_dynaddr_update(p); 490 491 /* Apply group flags to new members. */ 492 if (kif->pfik_group != NULL) { 493 CK_STAILQ_FOREACH(ifgm, &kif->pfik_group->ifg_members, 494 ifgm_next) { 495 tmpkif = (struct pfi_kif *)ifgm->ifgm_ifp->if_pf_kif; 496 if (tmpkif == NULL) 497 continue; 498 499 tmpkif->pfik_flags |= kif->pfik_flags; 500 } 501 } 502 503 /* again for all groups kif is member of */ 504 if (kif->pfik_ifp != NULL) { 505 CK_STAILQ_FOREACH(ifgl, &kif->pfik_ifp->if_groups, ifgl_next) 506 pfi_kif_update((struct pfi_kif *) 507 ifgl->ifgl_group->ifg_pf_kif); 508 } 509 } 510 511 static void 512 pfi_dynaddr_update(struct pfi_dynaddr *dyn) 513 { 514 struct pfi_kif *kif; 515 struct pfr_ktable *kt; 516 517 PF_RULES_WASSERT(); 518 KASSERT(dyn && dyn->pfid_kif && dyn->pfid_kt, 519 ("%s: bad argument", __func__)); 520 521 kif = dyn->pfid_kif; 522 kt = dyn->pfid_kt; 523 524 if (kt->pfrkt_larg != V_pfi_update) { 525 /* this table needs to be brought up-to-date */ 526 pfi_table_update(kt, kif, dyn->pfid_net, dyn->pfid_iflags); 527 kt->pfrkt_larg = V_pfi_update; 528 } 529 pfr_dynaddr_update(kt, dyn); 530 } 531 532 static void 533 pfi_table_update(struct pfr_ktable *kt, struct pfi_kif *kif, int net, int flags) 534 { 535 int e, size2 = 0; 536 struct ifg_member *ifgm; 537 538 NET_EPOCH_ASSERT(); 539 540 V_pfi_buffer_cnt = 0; 541 542 if (kif->pfik_ifp != NULL) 543 pfi_instance_add(kif->pfik_ifp, net, flags); 544 else if (kif->pfik_group != NULL) { 545 CK_STAILQ_FOREACH(ifgm, &kif->pfik_group->ifg_members, ifgm_next) 546 pfi_instance_add(ifgm->ifgm_ifp, net, flags); 547 } 548 549 if ((e = pfr_set_addrs(&kt->pfrkt_t, V_pfi_buffer, V_pfi_buffer_cnt, &size2, 550 NULL, NULL, NULL, 0, PFR_TFLAG_ALLMASK))) 551 printf("%s: cannot set %d new addresses into table %s: %d\n", 552 __func__, V_pfi_buffer_cnt, kt->pfrkt_name, e); 553 } 554 555 static void 556 pfi_instance_add(struct ifnet *ifp, int net, int flags) 557 { 558 struct ifaddr *ia; 559 int got4 = 0, got6 = 0; 560 int net2, af; 561 562 NET_EPOCH_ASSERT(); 563 564 CK_STAILQ_FOREACH(ia, &ifp->if_addrhead, ifa_link) { 565 if (ia->ifa_addr == NULL) 566 continue; 567 af = ia->ifa_addr->sa_family; 568 if (af != AF_INET && af != AF_INET6) 569 continue; 570 /* 571 * XXX: For point-to-point interfaces, (ifname:0) and IPv4, 572 * jump over addresses without a proper route to work 573 * around a problem with ppp not fully removing the 574 * address used during IPCP. 575 */ 576 if ((ifp->if_flags & IFF_POINTOPOINT) && 577 !(ia->ifa_flags & IFA_ROUTE) && 578 (flags & PFI_AFLAG_NOALIAS) && (af == AF_INET)) 579 continue; 580 if ((flags & PFI_AFLAG_BROADCAST) && af == AF_INET6) 581 continue; 582 if ((flags & PFI_AFLAG_BROADCAST) && 583 !(ifp->if_flags & IFF_BROADCAST)) 584 continue; 585 if ((flags & PFI_AFLAG_PEER) && 586 !(ifp->if_flags & IFF_POINTOPOINT)) 587 continue; 588 if ((flags & (PFI_AFLAG_NETWORK | PFI_AFLAG_NOALIAS)) && 589 af == AF_INET6 && 590 IN6_IS_ADDR_LINKLOCAL( 591 &((struct sockaddr_in6 *)ia->ifa_addr)->sin6_addr)) 592 continue; 593 if (flags & PFI_AFLAG_NOALIAS) { 594 if (af == AF_INET && got4) 595 continue; 596 if (af == AF_INET6 && got6) 597 continue; 598 } 599 if (af == AF_INET) 600 got4 = 1; 601 else if (af == AF_INET6) 602 got6 = 1; 603 net2 = net; 604 if (net2 == 128 && (flags & PFI_AFLAG_NETWORK)) { 605 if (af == AF_INET) 606 net2 = pfi_unmask(&((struct sockaddr_in *) 607 ia->ifa_netmask)->sin_addr); 608 else if (af == AF_INET6) 609 net2 = pfi_unmask(&((struct sockaddr_in6 *) 610 ia->ifa_netmask)->sin6_addr); 611 } 612 if (af == AF_INET && net2 > 32) 613 net2 = 32; 614 if (flags & PFI_AFLAG_BROADCAST) 615 pfi_address_add(ia->ifa_broadaddr, af, net2); 616 else if (flags & PFI_AFLAG_PEER) 617 pfi_address_add(ia->ifa_dstaddr, af, net2); 618 else 619 pfi_address_add(ia->ifa_addr, af, net2); 620 } 621 } 622 623 static void 624 pfi_address_add(struct sockaddr *sa, int af, int net) 625 { 626 struct pfr_addr *p; 627 int i; 628 629 if (V_pfi_buffer_cnt >= V_pfi_buffer_max) { 630 int new_max = V_pfi_buffer_max * 2; 631 632 if (new_max > PFI_BUFFER_MAX) { 633 printf("%s: address buffer full (%d/%d)\n", __func__, 634 V_pfi_buffer_cnt, PFI_BUFFER_MAX); 635 return; 636 } 637 p = malloc(new_max * sizeof(*V_pfi_buffer), PFI_MTYPE, 638 M_NOWAIT); 639 if (p == NULL) { 640 printf("%s: no memory to grow buffer (%d/%d)\n", 641 __func__, V_pfi_buffer_cnt, PFI_BUFFER_MAX); 642 return; 643 } 644 memcpy(p, V_pfi_buffer, V_pfi_buffer_max * sizeof(*V_pfi_buffer)); 645 /* no need to zero buffer */ 646 free(V_pfi_buffer, PFI_MTYPE); 647 V_pfi_buffer = p; 648 V_pfi_buffer_max = new_max; 649 } 650 if (af == AF_INET && net > 32) 651 net = 128; 652 p = V_pfi_buffer + V_pfi_buffer_cnt++; 653 bzero(p, sizeof(*p)); 654 p->pfra_af = af; 655 p->pfra_net = net; 656 if (af == AF_INET) 657 p->pfra_ip4addr = ((struct sockaddr_in *)sa)->sin_addr; 658 else if (af == AF_INET6) { 659 p->pfra_ip6addr = ((struct sockaddr_in6 *)sa)->sin6_addr; 660 if (IN6_IS_SCOPE_EMBED(&p->pfra_ip6addr)) 661 p->pfra_ip6addr.s6_addr16[1] = 0; 662 } 663 /* mask network address bits */ 664 if (net < 128) 665 ((caddr_t)p)[p->pfra_net/8] &= ~(0xFF >> (p->pfra_net%8)); 666 for (i = (p->pfra_net+7)/8; i < sizeof(p->pfra_u); i++) 667 ((caddr_t)p)[i] = 0; 668 } 669 670 void 671 pfi_dynaddr_remove(struct pfi_dynaddr *dyn) 672 { 673 674 KASSERT(dyn->pfid_kif != NULL, ("%s: null pfid_kif", __func__)); 675 KASSERT(dyn->pfid_kt != NULL, ("%s: null pfid_kt", __func__)); 676 677 TAILQ_REMOVE(&dyn->pfid_kif->pfik_dynaddrs, dyn, entry); 678 pfi_kif_unref(dyn->pfid_kif); 679 pfr_detach_table(dyn->pfid_kt); 680 free(dyn, PFI_MTYPE); 681 } 682 683 void 684 pfi_dynaddr_copyout(struct pf_addr_wrap *aw) 685 { 686 687 KASSERT(aw->type == PF_ADDR_DYNIFTL, 688 ("%s: type %u", __func__, aw->type)); 689 690 if (aw->p.dyn == NULL || aw->p.dyn->pfid_kif == NULL) 691 return; 692 aw->p.dyncnt = aw->p.dyn->pfid_acnt4 + aw->p.dyn->pfid_acnt6; 693 } 694 695 static int 696 pfi_if_compare(struct pfi_kif *p, struct pfi_kif *q) 697 { 698 return (strncmp(p->pfik_name, q->pfik_name, IFNAMSIZ)); 699 } 700 701 void 702 pfi_update_status(const char *name, struct pf_status *pfs) 703 { 704 struct pfi_kif *p; 705 struct pfi_kif_cmp key; 706 struct ifg_member p_member, *ifgm; 707 CK_STAILQ_HEAD(, ifg_member) ifg_members; 708 int i, j, k; 709 710 strlcpy(key.pfik_name, name, sizeof(key.pfik_name)); 711 p = RB_FIND(pfi_ifhead, &V_pfi_ifs, (struct pfi_kif *)&key); 712 if (p == NULL) 713 return; 714 715 if (p->pfik_group != NULL) { 716 bcopy(&p->pfik_group->ifg_members, &ifg_members, 717 sizeof(ifg_members)); 718 } else { 719 /* build a temporary list for p only */ 720 bzero(&p_member, sizeof(p_member)); 721 p_member.ifgm_ifp = p->pfik_ifp; 722 CK_STAILQ_INIT(&ifg_members); 723 CK_STAILQ_INSERT_TAIL(&ifg_members, &p_member, ifgm_next); 724 } 725 if (pfs) { 726 bzero(pfs->pcounters, sizeof(pfs->pcounters)); 727 bzero(pfs->bcounters, sizeof(pfs->bcounters)); 728 } 729 CK_STAILQ_FOREACH(ifgm, &ifg_members, ifgm_next) { 730 if (ifgm->ifgm_ifp == NULL || ifgm->ifgm_ifp->if_pf_kif == NULL) 731 continue; 732 p = (struct pfi_kif *)ifgm->ifgm_ifp->if_pf_kif; 733 734 /* just clear statistics */ 735 if (pfs == NULL) { 736 bzero(p->pfik_packets, sizeof(p->pfik_packets)); 737 bzero(p->pfik_bytes, sizeof(p->pfik_bytes)); 738 p->pfik_tzero = time_second; 739 continue; 740 } 741 for (i = 0; i < 2; i++) 742 for (j = 0; j < 2; j++) 743 for (k = 0; k < 2; k++) { 744 pfs->pcounters[i][j][k] += 745 p->pfik_packets[i][j][k]; 746 pfs->bcounters[i][j] += 747 p->pfik_bytes[i][j][k]; 748 } 749 } 750 } 751 752 void 753 pfi_get_ifaces(const char *name, struct pfi_kif *buf, int *size) 754 { 755 struct epoch_tracker et; 756 struct pfi_kif *p, *nextp; 757 int n = 0; 758 759 NET_EPOCH_ENTER(et); 760 for (p = RB_MIN(pfi_ifhead, &V_pfi_ifs); p; p = nextp) { 761 nextp = RB_NEXT(pfi_ifhead, &V_pfi_ifs, p); 762 if (pfi_skip_if(name, p)) 763 continue; 764 if (*size <= n++) 765 break; 766 if (!p->pfik_tzero) 767 p->pfik_tzero = time_second; 768 bcopy(p, buf++, sizeof(*buf)); 769 nextp = RB_NEXT(pfi_ifhead, &V_pfi_ifs, p); 770 } 771 *size = n; 772 NET_EPOCH_EXIT(et); 773 } 774 775 static int 776 pfi_skip_if(const char *filter, struct pfi_kif *p) 777 { 778 struct ifg_list *i; 779 int n; 780 781 NET_EPOCH_ASSERT(); 782 783 if (filter == NULL || !*filter) 784 return (0); 785 if (!strcmp(p->pfik_name, filter)) 786 return (0); /* exact match */ 787 n = strlen(filter); 788 if (n < 1 || n >= IFNAMSIZ) 789 return (1); /* sanity check */ 790 if (filter[n-1] >= '0' && filter[n-1] <= '9') 791 return (1); /* group names may not end in a digit */ 792 if (p->pfik_ifp == NULL) 793 return (1); 794 CK_STAILQ_FOREACH(i, &p->pfik_ifp->if_groups, ifgl_next) 795 if (!strncmp(i->ifgl_group->ifg_group, filter, IFNAMSIZ)) 796 return (0); /* iface is in group "filter" */ 797 return (1); 798 } 799 800 int 801 pfi_set_flags(const char *name, int flags) 802 { 803 struct epoch_tracker et; 804 struct pfi_kif *p; 805 806 NET_EPOCH_ENTER(et); 807 RB_FOREACH(p, pfi_ifhead, &V_pfi_ifs) { 808 if (pfi_skip_if(name, p)) 809 continue; 810 p->pfik_flags |= flags; 811 } 812 NET_EPOCH_EXIT(et); 813 return (0); 814 } 815 816 int 817 pfi_clear_flags(const char *name, int flags) 818 { 819 struct epoch_tracker et; 820 struct pfi_kif *p; 821 822 NET_EPOCH_ENTER(et); 823 RB_FOREACH(p, pfi_ifhead, &V_pfi_ifs) { 824 if (pfi_skip_if(name, p)) 825 continue; 826 p->pfik_flags &= ~flags; 827 } 828 NET_EPOCH_EXIT(et); 829 return (0); 830 } 831 832 /* from pf_print_state.c */ 833 static int 834 pfi_unmask(void *addr) 835 { 836 struct pf_addr *m = addr; 837 int i = 31, j = 0, b = 0; 838 u_int32_t tmp; 839 840 while (j < 4 && m->addr32[j] == 0xffffffff) { 841 b += 32; 842 j++; 843 } 844 if (j < 4) { 845 tmp = ntohl(m->addr32[j]); 846 for (i = 31; tmp & (1 << i); --i) 847 b++; 848 } 849 return (b); 850 } 851 852 static void 853 pfi_attach_ifnet_event(void *arg __unused, struct ifnet *ifp) 854 { 855 struct epoch_tracker et; 856 struct pfi_kif *kif; 857 858 if (V_pf_vnet_active == 0) { 859 /* Avoid teardown race in the least expensive way. */ 860 return; 861 } 862 kif = malloc(sizeof(*kif), PFI_MTYPE, M_WAITOK); 863 NET_EPOCH_ENTER(et); 864 PF_RULES_WLOCK(); 865 pfi_attach_ifnet(ifp, kif); 866 #ifdef ALTQ 867 pf_altq_ifnet_event(ifp, 0); 868 #endif 869 PF_RULES_WUNLOCK(); 870 NET_EPOCH_EXIT(et); 871 } 872 873 static void 874 pfi_detach_ifnet_event(void *arg __unused, struct ifnet *ifp) 875 { 876 struct epoch_tracker et; 877 struct pfi_kif *kif = (struct pfi_kif *)ifp->if_pf_kif; 878 879 if (pfsync_detach_ifnet_ptr) 880 pfsync_detach_ifnet_ptr(ifp); 881 882 if (kif == NULL) 883 return; 884 885 if (V_pf_vnet_active == 0) { 886 /* Avoid teardown race in the least expensive way. */ 887 return; 888 } 889 890 NET_EPOCH_ENTER(et); 891 PF_RULES_WLOCK(); 892 V_pfi_update++; 893 pfi_kif_update(kif); 894 895 if (kif->pfik_ifp) 896 if_rele(kif->pfik_ifp); 897 898 kif->pfik_ifp = NULL; 899 ifp->if_pf_kif = NULL; 900 #ifdef ALTQ 901 pf_altq_ifnet_event(ifp, 1); 902 #endif 903 PF_RULES_WUNLOCK(); 904 NET_EPOCH_EXIT(et); 905 } 906 907 static void 908 pfi_attach_group_event(void *arg __unused, struct ifg_group *ifg) 909 { 910 struct epoch_tracker et; 911 struct pfi_kif *kif; 912 913 if (V_pf_vnet_active == 0) { 914 /* Avoid teardown race in the least expensive way. */ 915 return; 916 } 917 kif = malloc(sizeof(*kif), PFI_MTYPE, M_WAITOK); 918 NET_EPOCH_ENTER(et); 919 PF_RULES_WLOCK(); 920 pfi_attach_ifgroup(ifg, kif); 921 PF_RULES_WUNLOCK(); 922 NET_EPOCH_EXIT(et); 923 } 924 925 static void 926 pfi_change_group_event(void *arg __unused, char *gname) 927 { 928 struct epoch_tracker et; 929 struct pfi_kif *kif; 930 931 if (V_pf_vnet_active == 0) { 932 /* Avoid teardown race in the least expensive way. */ 933 return; 934 } 935 936 kif = malloc(sizeof(*kif), PFI_MTYPE, M_WAITOK); 937 NET_EPOCH_ENTER(et); 938 PF_RULES_WLOCK(); 939 V_pfi_update++; 940 kif = pfi_kif_attach(kif, gname); 941 pfi_kif_update(kif); 942 PF_RULES_WUNLOCK(); 943 NET_EPOCH_EXIT(et); 944 } 945 946 static void 947 pfi_detach_group_event(void *arg __unused, struct ifg_group *ifg) 948 { 949 struct pfi_kif *kif = (struct pfi_kif *)ifg->ifg_pf_kif; 950 951 if (kif == NULL) 952 return; 953 954 if (V_pf_vnet_active == 0) { 955 /* Avoid teardown race in the least expensive way. */ 956 return; 957 } 958 PF_RULES_WLOCK(); 959 V_pfi_update++; 960 961 kif->pfik_group = NULL; 962 ifg->ifg_pf_kif = NULL; 963 PF_RULES_WUNLOCK(); 964 } 965 966 static void 967 pfi_ifaddr_event(void *arg __unused, struct ifnet *ifp) 968 { 969 970 KASSERT(ifp, ("ifp == NULL")); 971 972 if (ifp->if_pf_kif == NULL) 973 return; 974 975 if (V_pf_vnet_active == 0) { 976 /* Avoid teardown race in the least expensive way. */ 977 return; 978 } 979 PF_RULES_WLOCK(); 980 if (ifp->if_pf_kif) { 981 struct epoch_tracker et; 982 983 V_pfi_update++; 984 NET_EPOCH_ENTER(et); 985 pfi_kif_update(ifp->if_pf_kif); 986 NET_EPOCH_EXIT(et); 987 } 988 PF_RULES_WUNLOCK(); 989 } 990