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 static VNET_DEFINE(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 static VNET_DEFINE(struct pfr_addr *, pfi_buffer); 66 static VNET_DEFINE(int, pfi_buffer_cnt); 67 static VNET_DEFINE(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 static VNET_DEFINE(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 static VNET_DEFINE(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 kif->pfik_ifp->if_pf_kif = NULL; 170 free(kif, PFI_MTYPE); 171 } 172 173 mtx_lock(&pfi_unlnkdkifs_mtx); 174 while ((kif = LIST_FIRST(&V_pfi_unlinked_kifs))) { 175 LIST_REMOVE(kif, pfik_list); 176 free(kif, PFI_MTYPE); 177 } 178 mtx_unlock(&pfi_unlnkdkifs_mtx); 179 180 free(V_pfi_buffer, PFI_MTYPE); 181 } 182 183 void 184 pfi_cleanup(void) 185 { 186 187 EVENTHANDLER_DEREGISTER(ifnet_arrival_event, pfi_attach_cookie); 188 EVENTHANDLER_DEREGISTER(ifnet_departure_event, pfi_detach_cookie); 189 EVENTHANDLER_DEREGISTER(group_attach_event, pfi_attach_group_cookie); 190 EVENTHANDLER_DEREGISTER(group_change_event, pfi_change_group_cookie); 191 EVENTHANDLER_DEREGISTER(group_detach_event, pfi_detach_group_cookie); 192 EVENTHANDLER_DEREGISTER(ifaddr_event, pfi_ifaddr_event_cookie); 193 } 194 195 struct pfi_kif * 196 pfi_kif_find(const char *kif_name) 197 { 198 struct pfi_kif_cmp s; 199 200 PF_RULES_ASSERT(); 201 202 bzero(&s, sizeof(s)); 203 strlcpy(s.pfik_name, kif_name, sizeof(s.pfik_name)); 204 205 return (RB_FIND(pfi_ifhead, &V_pfi_ifs, (struct pfi_kif *)&s)); 206 } 207 208 struct pfi_kif * 209 pfi_kif_attach(struct pfi_kif *kif, const char *kif_name) 210 { 211 struct pfi_kif *kif1; 212 213 PF_RULES_WASSERT(); 214 KASSERT(kif != NULL, ("%s: null kif", __func__)); 215 216 kif1 = pfi_kif_find(kif_name); 217 if (kif1 != NULL) { 218 free(kif, PFI_MTYPE); 219 return (kif1); 220 } 221 222 bzero(kif, sizeof(*kif)); 223 strlcpy(kif->pfik_name, kif_name, sizeof(kif->pfik_name)); 224 /* 225 * It seems that the value of time_second is in unintialzied state 226 * when pf sets interface statistics clear time in boot phase if pf 227 * was statically linked to kernel. Instead of setting the bogus 228 * time value have pfi_get_ifaces handle this case. In 229 * pfi_get_ifaces it uses time_second if it sees the time is 0. 230 */ 231 kif->pfik_tzero = time_second > 1 ? time_second : 0; 232 TAILQ_INIT(&kif->pfik_dynaddrs); 233 234 RB_INSERT(pfi_ifhead, &V_pfi_ifs, kif); 235 236 return (kif); 237 } 238 239 void 240 pfi_kif_ref(struct pfi_kif *kif) 241 { 242 243 PF_RULES_WASSERT(); 244 kif->pfik_rulerefs++; 245 } 246 247 void 248 pfi_kif_unref(struct pfi_kif *kif) 249 { 250 251 PF_RULES_WASSERT(); 252 KASSERT(kif->pfik_rulerefs > 0, ("%s: %p has zero refs", __func__, kif)); 253 254 kif->pfik_rulerefs--; 255 256 if (kif->pfik_rulerefs > 0) 257 return; 258 259 /* kif referencing an existing ifnet or group should exist. */ 260 if (kif->pfik_ifp != NULL || kif->pfik_group != NULL || kif == V_pfi_all) 261 return; 262 263 RB_REMOVE(pfi_ifhead, &V_pfi_ifs, kif); 264 265 kif->pfik_flags |= PFI_IFLAG_REFS; 266 267 mtx_lock(&pfi_unlnkdkifs_mtx); 268 LIST_INSERT_HEAD(&V_pfi_unlinked_kifs, kif, pfik_list); 269 mtx_unlock(&pfi_unlnkdkifs_mtx); 270 } 271 272 void 273 pfi_kif_purge(void) 274 { 275 struct pfi_kif *kif, *kif1; 276 277 /* 278 * Do naive mark-and-sweep garbage collecting of old kifs. 279 * Reference flag is raised by pf_purge_expired_states(). 280 */ 281 mtx_lock(&pfi_unlnkdkifs_mtx); 282 LIST_FOREACH_SAFE(kif, &V_pfi_unlinked_kifs, pfik_list, kif1) { 283 if (!(kif->pfik_flags & PFI_IFLAG_REFS)) { 284 LIST_REMOVE(kif, pfik_list); 285 free(kif, PFI_MTYPE); 286 } else 287 kif->pfik_flags &= ~PFI_IFLAG_REFS; 288 } 289 mtx_unlock(&pfi_unlnkdkifs_mtx); 290 } 291 292 int 293 pfi_kif_match(struct pfi_kif *rule_kif, struct pfi_kif *packet_kif) 294 { 295 struct ifg_list *p; 296 297 if (rule_kif == NULL || rule_kif == packet_kif) 298 return (1); 299 300 if (rule_kif->pfik_group != NULL) 301 /* XXXGL: locking? */ 302 CK_STAILQ_FOREACH(p, &packet_kif->pfik_ifp->if_groups, ifgl_next) 303 if (p->ifgl_group == rule_kif->pfik_group) 304 return (1); 305 306 return (0); 307 } 308 309 static void 310 pfi_attach_ifnet(struct ifnet *ifp) 311 { 312 struct pfi_kif *kif; 313 314 kif = malloc(sizeof(*kif), PFI_MTYPE, M_WAITOK); 315 316 PF_RULES_WLOCK(); 317 V_pfi_update++; 318 kif = pfi_kif_attach(kif, ifp->if_xname); 319 320 kif->pfik_ifp = ifp; 321 ifp->if_pf_kif = kif; 322 323 pfi_kif_update(kif); 324 PF_RULES_WUNLOCK(); 325 } 326 327 static void 328 pfi_attach_ifgroup(struct ifg_group *ifg) 329 { 330 struct pfi_kif *kif; 331 332 kif = malloc(sizeof(*kif), PFI_MTYPE, M_WAITOK); 333 334 PF_RULES_WLOCK(); 335 V_pfi_update++; 336 kif = pfi_kif_attach(kif, ifg->ifg_group); 337 338 kif->pfik_group = ifg; 339 ifg->ifg_pf_kif = kif; 340 PF_RULES_WUNLOCK(); 341 } 342 343 int 344 pfi_match_addr(struct pfi_dynaddr *dyn, struct pf_addr *a, sa_family_t af) 345 { 346 switch (af) { 347 #ifdef INET 348 case AF_INET: 349 switch (dyn->pfid_acnt4) { 350 case 0: 351 return (0); 352 case 1: 353 return (PF_MATCHA(0, &dyn->pfid_addr4, 354 &dyn->pfid_mask4, a, AF_INET)); 355 default: 356 return (pfr_match_addr(dyn->pfid_kt, a, AF_INET)); 357 } 358 break; 359 #endif /* INET */ 360 #ifdef INET6 361 case AF_INET6: 362 switch (dyn->pfid_acnt6) { 363 case 0: 364 return (0); 365 case 1: 366 return (PF_MATCHA(0, &dyn->pfid_addr6, 367 &dyn->pfid_mask6, a, AF_INET6)); 368 default: 369 return (pfr_match_addr(dyn->pfid_kt, a, AF_INET6)); 370 } 371 break; 372 #endif /* INET6 */ 373 default: 374 return (0); 375 } 376 } 377 378 int 379 pfi_dynaddr_setup(struct pf_addr_wrap *aw, sa_family_t af) 380 { 381 struct pfi_dynaddr *dyn; 382 char tblname[PF_TABLE_NAME_SIZE]; 383 struct pf_ruleset *ruleset = NULL; 384 struct pfi_kif *kif; 385 int rv = 0; 386 387 PF_RULES_WASSERT(); 388 KASSERT(aw->type == PF_ADDR_DYNIFTL, ("%s: type %u", 389 __func__, aw->type)); 390 KASSERT(aw->p.dyn == NULL, ("%s: dyn is %p", __func__, aw->p.dyn)); 391 392 if ((dyn = malloc(sizeof(*dyn), PFI_MTYPE, M_NOWAIT | M_ZERO)) == NULL) 393 return (ENOMEM); 394 395 if ((kif = malloc(sizeof(*kif), PFI_MTYPE, M_NOWAIT)) == NULL) { 396 free(dyn, PFI_MTYPE); 397 return (ENOMEM); 398 } 399 400 if (!strcmp(aw->v.ifname, "self")) 401 dyn->pfid_kif = pfi_kif_attach(kif, IFG_ALL); 402 else 403 dyn->pfid_kif = pfi_kif_attach(kif, aw->v.ifname); 404 pfi_kif_ref(dyn->pfid_kif); 405 406 dyn->pfid_net = pfi_unmask(&aw->v.a.mask); 407 if (af == AF_INET && dyn->pfid_net == 32) 408 dyn->pfid_net = 128; 409 strlcpy(tblname, aw->v.ifname, sizeof(tblname)); 410 if (aw->iflags & PFI_AFLAG_NETWORK) 411 strlcat(tblname, ":network", sizeof(tblname)); 412 if (aw->iflags & PFI_AFLAG_BROADCAST) 413 strlcat(tblname, ":broadcast", sizeof(tblname)); 414 if (aw->iflags & PFI_AFLAG_PEER) 415 strlcat(tblname, ":peer", sizeof(tblname)); 416 if (aw->iflags & PFI_AFLAG_NOALIAS) 417 strlcat(tblname, ":0", sizeof(tblname)); 418 if (dyn->pfid_net != 128) 419 snprintf(tblname + strlen(tblname), 420 sizeof(tblname) - strlen(tblname), "/%d", dyn->pfid_net); 421 if ((ruleset = pf_find_or_create_ruleset(PF_RESERVED_ANCHOR)) == NULL) { 422 rv = ENOMEM; 423 goto _bad; 424 } 425 426 if ((dyn->pfid_kt = pfr_attach_table(ruleset, tblname)) == NULL) { 427 rv = ENOMEM; 428 goto _bad; 429 } 430 431 dyn->pfid_kt->pfrkt_flags |= PFR_TFLAG_ACTIVE; 432 dyn->pfid_iflags = aw->iflags; 433 dyn->pfid_af = af; 434 435 TAILQ_INSERT_TAIL(&dyn->pfid_kif->pfik_dynaddrs, dyn, entry); 436 aw->p.dyn = dyn; 437 pfi_kif_update(dyn->pfid_kif); 438 439 return (0); 440 441 _bad: 442 if (dyn->pfid_kt != NULL) 443 pfr_detach_table(dyn->pfid_kt); 444 if (ruleset != NULL) 445 pf_remove_if_empty_ruleset(ruleset); 446 if (dyn->pfid_kif != NULL) 447 pfi_kif_unref(dyn->pfid_kif); 448 free(dyn, PFI_MTYPE); 449 450 return (rv); 451 } 452 453 static void 454 pfi_kif_update(struct pfi_kif *kif) 455 { 456 struct ifg_list *ifgl; 457 struct pfi_dynaddr *p; 458 459 PF_RULES_WASSERT(); 460 461 /* update all dynaddr */ 462 TAILQ_FOREACH(p, &kif->pfik_dynaddrs, entry) 463 pfi_dynaddr_update(p); 464 465 /* again for all groups kif is member of */ 466 if (kif->pfik_ifp != NULL) { 467 IF_ADDR_RLOCK(kif->pfik_ifp); 468 CK_STAILQ_FOREACH(ifgl, &kif->pfik_ifp->if_groups, ifgl_next) 469 pfi_kif_update((struct pfi_kif *) 470 ifgl->ifgl_group->ifg_pf_kif); 471 IF_ADDR_RUNLOCK(kif->pfik_ifp); 472 } 473 } 474 475 static void 476 pfi_dynaddr_update(struct pfi_dynaddr *dyn) 477 { 478 struct pfi_kif *kif; 479 struct pfr_ktable *kt; 480 481 PF_RULES_WASSERT(); 482 KASSERT(dyn && dyn->pfid_kif && dyn->pfid_kt, 483 ("%s: bad argument", __func__)); 484 485 kif = dyn->pfid_kif; 486 kt = dyn->pfid_kt; 487 488 if (kt->pfrkt_larg != V_pfi_update) { 489 /* this table needs to be brought up-to-date */ 490 pfi_table_update(kt, kif, dyn->pfid_net, dyn->pfid_iflags); 491 kt->pfrkt_larg = V_pfi_update; 492 } 493 pfr_dynaddr_update(kt, dyn); 494 } 495 496 static void 497 pfi_table_update(struct pfr_ktable *kt, struct pfi_kif *kif, int net, int flags) 498 { 499 int e, size2 = 0; 500 struct ifg_member *ifgm; 501 502 V_pfi_buffer_cnt = 0; 503 504 if (kif->pfik_ifp != NULL) 505 pfi_instance_add(kif->pfik_ifp, net, flags); 506 else if (kif->pfik_group != NULL) { 507 IFNET_RLOCK_NOSLEEP(); 508 CK_STAILQ_FOREACH(ifgm, &kif->pfik_group->ifg_members, ifgm_next) 509 pfi_instance_add(ifgm->ifgm_ifp, net, flags); 510 IFNET_RUNLOCK_NOSLEEP(); 511 } 512 513 if ((e = pfr_set_addrs(&kt->pfrkt_t, V_pfi_buffer, V_pfi_buffer_cnt, &size2, 514 NULL, NULL, NULL, 0, PFR_TFLAG_ALLMASK))) 515 printf("%s: cannot set %d new addresses into table %s: %d\n", 516 __func__, V_pfi_buffer_cnt, kt->pfrkt_name, e); 517 } 518 519 static void 520 pfi_instance_add(struct ifnet *ifp, int net, int flags) 521 { 522 struct ifaddr *ia; 523 int got4 = 0, got6 = 0; 524 int net2, af; 525 526 IF_ADDR_RLOCK(ifp); 527 CK_STAILQ_FOREACH(ia, &ifp->if_addrhead, ifa_link) { 528 if (ia->ifa_addr == NULL) 529 continue; 530 af = ia->ifa_addr->sa_family; 531 if (af != AF_INET && af != AF_INET6) 532 continue; 533 /* 534 * XXX: For point-to-point interfaces, (ifname:0) and IPv4, 535 * jump over addresses without a proper route to work 536 * around a problem with ppp not fully removing the 537 * address used during IPCP. 538 */ 539 if ((ifp->if_flags & IFF_POINTOPOINT) && 540 !(ia->ifa_flags & IFA_ROUTE) && 541 (flags & PFI_AFLAG_NOALIAS) && (af == AF_INET)) 542 continue; 543 if ((flags & PFI_AFLAG_BROADCAST) && af == AF_INET6) 544 continue; 545 if ((flags & PFI_AFLAG_BROADCAST) && 546 !(ifp->if_flags & IFF_BROADCAST)) 547 continue; 548 if ((flags & PFI_AFLAG_PEER) && 549 !(ifp->if_flags & IFF_POINTOPOINT)) 550 continue; 551 if ((flags & PFI_AFLAG_NETWORK) && af == AF_INET6 && 552 IN6_IS_ADDR_LINKLOCAL( 553 &((struct sockaddr_in6 *)ia->ifa_addr)->sin6_addr)) 554 continue; 555 if (flags & PFI_AFLAG_NOALIAS) { 556 if (af == AF_INET && got4) 557 continue; 558 if (af == AF_INET6 && got6) 559 continue; 560 } 561 if (af == AF_INET) 562 got4 = 1; 563 else if (af == AF_INET6) 564 got6 = 1; 565 net2 = net; 566 if (net2 == 128 && (flags & PFI_AFLAG_NETWORK)) { 567 if (af == AF_INET) 568 net2 = pfi_unmask(&((struct sockaddr_in *) 569 ia->ifa_netmask)->sin_addr); 570 else if (af == AF_INET6) 571 net2 = pfi_unmask(&((struct sockaddr_in6 *) 572 ia->ifa_netmask)->sin6_addr); 573 } 574 if (af == AF_INET && net2 > 32) 575 net2 = 32; 576 if (flags & PFI_AFLAG_BROADCAST) 577 pfi_address_add(ia->ifa_broadaddr, af, net2); 578 else if (flags & PFI_AFLAG_PEER) 579 pfi_address_add(ia->ifa_dstaddr, af, net2); 580 else 581 pfi_address_add(ia->ifa_addr, af, net2); 582 } 583 IF_ADDR_RUNLOCK(ifp); 584 } 585 586 static void 587 pfi_address_add(struct sockaddr *sa, int af, int net) 588 { 589 struct pfr_addr *p; 590 int i; 591 592 if (V_pfi_buffer_cnt >= V_pfi_buffer_max) { 593 int new_max = V_pfi_buffer_max * 2; 594 595 if (new_max > PFI_BUFFER_MAX) { 596 printf("%s: address buffer full (%d/%d)\n", __func__, 597 V_pfi_buffer_cnt, PFI_BUFFER_MAX); 598 return; 599 } 600 p = malloc(new_max * sizeof(*V_pfi_buffer), PFI_MTYPE, 601 M_NOWAIT); 602 if (p == NULL) { 603 printf("%s: no memory to grow buffer (%d/%d)\n", 604 __func__, V_pfi_buffer_cnt, PFI_BUFFER_MAX); 605 return; 606 } 607 memcpy(p, V_pfi_buffer, V_pfi_buffer_max * sizeof(*V_pfi_buffer)); 608 /* no need to zero buffer */ 609 free(V_pfi_buffer, PFI_MTYPE); 610 V_pfi_buffer = p; 611 V_pfi_buffer_max = new_max; 612 } 613 if (af == AF_INET && net > 32) 614 net = 128; 615 p = V_pfi_buffer + V_pfi_buffer_cnt++; 616 bzero(p, sizeof(*p)); 617 p->pfra_af = af; 618 p->pfra_net = net; 619 if (af == AF_INET) 620 p->pfra_ip4addr = ((struct sockaddr_in *)sa)->sin_addr; 621 else if (af == AF_INET6) { 622 p->pfra_ip6addr = ((struct sockaddr_in6 *)sa)->sin6_addr; 623 if (IN6_IS_SCOPE_EMBED(&p->pfra_ip6addr)) 624 p->pfra_ip6addr.s6_addr16[1] = 0; 625 } 626 /* mask network address bits */ 627 if (net < 128) 628 ((caddr_t)p)[p->pfra_net/8] &= ~(0xFF >> (p->pfra_net%8)); 629 for (i = (p->pfra_net+7)/8; i < sizeof(p->pfra_u); i++) 630 ((caddr_t)p)[i] = 0; 631 } 632 633 void 634 pfi_dynaddr_remove(struct pfi_dynaddr *dyn) 635 { 636 637 KASSERT(dyn->pfid_kif != NULL, ("%s: null pfid_kif", __func__)); 638 KASSERT(dyn->pfid_kt != NULL, ("%s: null pfid_kt", __func__)); 639 640 TAILQ_REMOVE(&dyn->pfid_kif->pfik_dynaddrs, dyn, entry); 641 pfi_kif_unref(dyn->pfid_kif); 642 pfr_detach_table(dyn->pfid_kt); 643 free(dyn, PFI_MTYPE); 644 } 645 646 void 647 pfi_dynaddr_copyout(struct pf_addr_wrap *aw) 648 { 649 650 KASSERT(aw->type == PF_ADDR_DYNIFTL, 651 ("%s: type %u", __func__, aw->type)); 652 653 if (aw->p.dyn == NULL || aw->p.dyn->pfid_kif == NULL) 654 return; 655 aw->p.dyncnt = aw->p.dyn->pfid_acnt4 + aw->p.dyn->pfid_acnt6; 656 } 657 658 static int 659 pfi_if_compare(struct pfi_kif *p, struct pfi_kif *q) 660 { 661 return (strncmp(p->pfik_name, q->pfik_name, IFNAMSIZ)); 662 } 663 664 void 665 pfi_update_status(const char *name, struct pf_status *pfs) 666 { 667 struct pfi_kif *p; 668 struct pfi_kif_cmp key; 669 struct ifg_member p_member, *ifgm; 670 CK_STAILQ_HEAD(, ifg_member) ifg_members; 671 int i, j, k; 672 673 strlcpy(key.pfik_name, name, sizeof(key.pfik_name)); 674 p = RB_FIND(pfi_ifhead, &V_pfi_ifs, (struct pfi_kif *)&key); 675 if (p == NULL) 676 return; 677 678 if (p->pfik_group != NULL) { 679 bcopy(&p->pfik_group->ifg_members, &ifg_members, 680 sizeof(ifg_members)); 681 } else { 682 /* build a temporary list for p only */ 683 bzero(&p_member, sizeof(p_member)); 684 p_member.ifgm_ifp = p->pfik_ifp; 685 CK_STAILQ_INIT(&ifg_members); 686 CK_STAILQ_INSERT_TAIL(&ifg_members, &p_member, ifgm_next); 687 } 688 if (pfs) { 689 bzero(pfs->pcounters, sizeof(pfs->pcounters)); 690 bzero(pfs->bcounters, sizeof(pfs->bcounters)); 691 } 692 CK_STAILQ_FOREACH(ifgm, &ifg_members, ifgm_next) { 693 if (ifgm->ifgm_ifp == NULL || ifgm->ifgm_ifp->if_pf_kif == NULL) 694 continue; 695 p = (struct pfi_kif *)ifgm->ifgm_ifp->if_pf_kif; 696 697 /* just clear statistics */ 698 if (pfs == NULL) { 699 bzero(p->pfik_packets, sizeof(p->pfik_packets)); 700 bzero(p->pfik_bytes, sizeof(p->pfik_bytes)); 701 p->pfik_tzero = time_second; 702 continue; 703 } 704 for (i = 0; i < 2; i++) 705 for (j = 0; j < 2; j++) 706 for (k = 0; k < 2; k++) { 707 pfs->pcounters[i][j][k] += 708 p->pfik_packets[i][j][k]; 709 pfs->bcounters[i][j] += 710 p->pfik_bytes[i][j][k]; 711 } 712 } 713 } 714 715 void 716 pfi_get_ifaces(const char *name, struct pfi_kif *buf, int *size) 717 { 718 struct pfi_kif *p, *nextp; 719 int n = 0; 720 721 for (p = RB_MIN(pfi_ifhead, &V_pfi_ifs); p; p = nextp) { 722 nextp = RB_NEXT(pfi_ifhead, &V_pfi_ifs, p); 723 if (pfi_skip_if(name, p)) 724 continue; 725 if (*size <= n++) 726 break; 727 if (!p->pfik_tzero) 728 p->pfik_tzero = time_second; 729 bcopy(p, buf++, sizeof(*buf)); 730 nextp = RB_NEXT(pfi_ifhead, &V_pfi_ifs, p); 731 } 732 *size = n; 733 } 734 735 static int 736 pfi_skip_if(const char *filter, struct pfi_kif *p) 737 { 738 int n; 739 740 if (filter == NULL || !*filter) 741 return (0); 742 if (!strcmp(p->pfik_name, filter)) 743 return (0); /* exact match */ 744 n = strlen(filter); 745 if (n < 1 || n >= IFNAMSIZ) 746 return (1); /* sanity check */ 747 if (filter[n-1] >= '0' && filter[n-1] <= '9') 748 return (1); /* only do exact match in that case */ 749 if (strncmp(p->pfik_name, filter, n)) 750 return (1); /* prefix doesn't match */ 751 return (p->pfik_name[n] < '0' || p->pfik_name[n] > '9'); 752 } 753 754 int 755 pfi_set_flags(const char *name, int flags) 756 { 757 struct pfi_kif *p; 758 759 RB_FOREACH(p, pfi_ifhead, &V_pfi_ifs) { 760 if (pfi_skip_if(name, p)) 761 continue; 762 p->pfik_flags |= flags; 763 } 764 return (0); 765 } 766 767 int 768 pfi_clear_flags(const char *name, int flags) 769 { 770 struct pfi_kif *p; 771 772 RB_FOREACH(p, pfi_ifhead, &V_pfi_ifs) { 773 if (pfi_skip_if(name, p)) 774 continue; 775 p->pfik_flags &= ~flags; 776 } 777 return (0); 778 } 779 780 /* from pf_print_state.c */ 781 static int 782 pfi_unmask(void *addr) 783 { 784 struct pf_addr *m = addr; 785 int i = 31, j = 0, b = 0; 786 u_int32_t tmp; 787 788 while (j < 4 && m->addr32[j] == 0xffffffff) { 789 b += 32; 790 j++; 791 } 792 if (j < 4) { 793 tmp = ntohl(m->addr32[j]); 794 for (i = 31; tmp & (1 << i); --i) 795 b++; 796 } 797 return (b); 798 } 799 800 static void 801 pfi_attach_ifnet_event(void *arg __unused, struct ifnet *ifp) 802 { 803 804 if (V_pf_vnet_active == 0) { 805 /* Avoid teardown race in the least expensive way. */ 806 return; 807 } 808 pfi_attach_ifnet(ifp); 809 #ifdef ALTQ 810 PF_RULES_WLOCK(); 811 pf_altq_ifnet_event(ifp, 0); 812 PF_RULES_WUNLOCK(); 813 #endif 814 } 815 816 static void 817 pfi_detach_ifnet_event(void *arg __unused, struct ifnet *ifp) 818 { 819 struct pfi_kif *kif = (struct pfi_kif *)ifp->if_pf_kif; 820 821 if (kif == NULL) 822 return; 823 824 if (V_pf_vnet_active == 0) { 825 /* Avoid teardown race in the least expensive way. */ 826 return; 827 } 828 PF_RULES_WLOCK(); 829 V_pfi_update++; 830 pfi_kif_update(kif); 831 832 kif->pfik_ifp = NULL; 833 ifp->if_pf_kif = NULL; 834 #ifdef ALTQ 835 pf_altq_ifnet_event(ifp, 1); 836 #endif 837 PF_RULES_WUNLOCK(); 838 } 839 840 static void 841 pfi_attach_group_event(void *arg __unused, struct ifg_group *ifg) 842 { 843 844 if (V_pf_vnet_active == 0) { 845 /* Avoid teardown race in the least expensive way. */ 846 return; 847 } 848 pfi_attach_ifgroup(ifg); 849 } 850 851 static void 852 pfi_change_group_event(void *arg __unused, char *gname) 853 { 854 struct pfi_kif *kif; 855 856 if (V_pf_vnet_active == 0) { 857 /* Avoid teardown race in the least expensive way. */ 858 return; 859 } 860 861 kif = malloc(sizeof(*kif), PFI_MTYPE, M_WAITOK); 862 PF_RULES_WLOCK(); 863 V_pfi_update++; 864 kif = pfi_kif_attach(kif, gname); 865 pfi_kif_update(kif); 866 PF_RULES_WUNLOCK(); 867 } 868 869 static void 870 pfi_detach_group_event(void *arg __unused, struct ifg_group *ifg) 871 { 872 struct pfi_kif *kif = (struct pfi_kif *)ifg->ifg_pf_kif; 873 874 if (kif == NULL) 875 return; 876 877 if (V_pf_vnet_active == 0) { 878 /* Avoid teardown race in the least expensive way. */ 879 return; 880 } 881 PF_RULES_WLOCK(); 882 V_pfi_update++; 883 884 kif->pfik_group = NULL; 885 ifg->ifg_pf_kif = NULL; 886 PF_RULES_WUNLOCK(); 887 } 888 889 static void 890 pfi_ifaddr_event(void *arg __unused, struct ifnet *ifp) 891 { 892 if (ifp->if_pf_kif == NULL) 893 return; 894 895 if (V_pf_vnet_active == 0) { 896 /* Avoid teardown race in the least expensive way. */ 897 return; 898 } 899 PF_RULES_WLOCK(); 900 if (ifp && ifp->if_pf_kif) { 901 V_pfi_update++; 902 pfi_kif_update(ifp->if_pf_kif); 903 } 904 PF_RULES_WUNLOCK(); 905 } 906