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