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