1 /* $OpenBSD: pf_if.c,v 1.63 2011/07/28 11:03:49 henning Exp $ */ 2 3 /* 4 * Copyright 2005 Henning Brauer <henning@openbsd.org> 5 * Copyright 2005 Ryan McBride <mcbride@openbsd.org> 6 * Copyright (c) 2001 Daniel Hartmeier 7 * Copyright (c) 2003 Cedric Berger 8 * All rights reserved. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 14 * - Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * - Redistributions in binary form must reproduce the above 17 * copyright notice, this list of conditions and the following 18 * disclaimer in the documentation and/or other materials provided 19 * with the distribution. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 22 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 23 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 24 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE 25 * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 26 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 27 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 28 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER 29 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN 31 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 32 * POSSIBILITY OF SUCH DAMAGE. 33 */ 34 35 #include <sys/param.h> 36 #include <sys/systm.h> 37 #include <sys/mbuf.h> 38 #include <sys/filio.h> 39 #include <sys/socket.h> 40 #include <sys/socketvar.h> 41 #include <sys/kernel.h> 42 #include <sys/device.h> 43 #include <sys/time.h> 44 #include <sys/pool.h> 45 #include <sys/syslog.h> 46 47 #include <net/if.h> 48 #include <net/if_types.h> 49 50 #include <netinet/in.h> 51 #include <netinet/in_var.h> 52 #include <netinet/in_systm.h> 53 #include <netinet/ip.h> 54 #include <netinet/ip_var.h> 55 56 #include <net/pfvar.h> 57 58 #ifdef INET6 59 #include <netinet/ip6.h> 60 #endif /* INET6 */ 61 62 struct pfi_kif *pfi_all = NULL; 63 struct pool pfi_addr_pl; 64 struct pfi_ifhead pfi_ifs; 65 long pfi_update = 1; 66 struct pfr_addr *pfi_buffer; 67 int pfi_buffer_cnt; 68 int pfi_buffer_max; 69 70 void pfi_kif_update(struct pfi_kif *); 71 void pfi_dynaddr_update(struct pfi_dynaddr *dyn); 72 void pfi_table_update(struct pfr_ktable *, struct pfi_kif *, 73 int, int); 74 void pfi_kifaddr_update(void *); 75 void pfi_instance_add(struct ifnet *, int, int); 76 void pfi_address_add(struct sockaddr *, int, int); 77 int pfi_if_compare(struct pfi_kif *, struct pfi_kif *); 78 int pfi_skip_if(const char *, struct pfi_kif *); 79 int pfi_unmask(void *); 80 81 RB_PROTOTYPE(pfi_ifhead, pfi_kif, pfik_tree, pfi_if_compare); 82 RB_GENERATE(pfi_ifhead, pfi_kif, pfik_tree, pfi_if_compare); 83 84 #define PFI_BUFFER_MAX 0x10000 85 #define PFI_MTYPE M_IFADDR 86 87 void 88 pfi_initialize(void) 89 { 90 if (pfi_all != NULL) /* already initialized */ 91 return; 92 93 pool_init(&pfi_addr_pl, sizeof(struct pfi_dynaddr), 0, 0, 0, 94 "pfiaddrpl", &pool_allocator_nointr); 95 pfi_buffer_max = 64; 96 pfi_buffer = malloc(pfi_buffer_max * sizeof(*pfi_buffer), 97 PFI_MTYPE, M_WAITOK); 98 99 if ((pfi_all = pfi_kif_get(IFG_ALL)) == NULL) 100 panic("pfi_kif_get for pfi_all failed"); 101 } 102 103 struct pfi_kif * 104 pfi_kif_get(const char *kif_name) 105 { 106 struct pfi_kif *kif; 107 struct pfi_kif_cmp s; 108 109 bzero(&s, sizeof(s)); 110 strlcpy(s.pfik_name, kif_name, sizeof(s.pfik_name)); 111 if ((kif = RB_FIND(pfi_ifhead, &pfi_ifs, (struct pfi_kif *)&s)) != NULL) 112 return (kif); 113 114 /* create new one */ 115 if ((kif = malloc(sizeof(*kif), PFI_MTYPE, M_DONTWAIT|M_ZERO)) == NULL) 116 return (NULL); 117 118 strlcpy(kif->pfik_name, kif_name, sizeof(kif->pfik_name)); 119 kif->pfik_tzero = time_second; 120 TAILQ_INIT(&kif->pfik_dynaddrs); 121 122 RB_INSERT(pfi_ifhead, &pfi_ifs, kif); 123 return (kif); 124 } 125 126 void 127 pfi_kif_ref(struct pfi_kif *kif, enum pfi_kif_refs what) 128 { 129 switch (what) { 130 case PFI_KIF_REF_RULE: 131 kif->pfik_rules++; 132 break; 133 case PFI_KIF_REF_STATE: 134 kif->pfik_states++; 135 break; 136 case PFI_KIF_REF_ROUTE: 137 kif->pfik_routes++; 138 break; 139 default: 140 panic("pfi_kif_ref with unknown type"); 141 } 142 } 143 144 void 145 pfi_kif_unref(struct pfi_kif *kif, enum pfi_kif_refs what) 146 { 147 if (kif == NULL) 148 return; 149 150 switch (what) { 151 case PFI_KIF_REF_NONE: 152 break; 153 case PFI_KIF_REF_RULE: 154 if (kif->pfik_rules <= 0) { 155 DPFPRINTF(LOG_ERR, 156 "pfi_kif_unref: rules refcount <= 0"); 157 return; 158 } 159 kif->pfik_rules--; 160 break; 161 case PFI_KIF_REF_STATE: 162 if (kif->pfik_states <= 0) { 163 DPFPRINTF(LOG_ERR, 164 "pfi_kif_unref: state refcount <= 0"); 165 return; 166 } 167 kif->pfik_states--; 168 break; 169 case PFI_KIF_REF_ROUTE: 170 if (kif->pfik_routes <= 0) { 171 DPFPRINTF(LOG_ERR, 172 "pfi_kif_unref: state refcount <= 0"); 173 return; 174 } 175 kif->pfik_routes--; 176 break; 177 default: 178 panic("pfi_kif_unref with unknown type"); 179 } 180 181 if (kif->pfik_ifp != NULL || kif->pfik_group != NULL || kif == pfi_all) 182 return; 183 184 if (kif->pfik_rules || kif->pfik_states || kif->pfik_routes) 185 return; 186 187 RB_REMOVE(pfi_ifhead, &pfi_ifs, kif); 188 free(kif, PFI_MTYPE); 189 } 190 191 int 192 pfi_kif_match(struct pfi_kif *rule_kif, struct pfi_kif *packet_kif) 193 { 194 struct ifg_list *p; 195 196 if (rule_kif == NULL || rule_kif == packet_kif) 197 return (1); 198 199 if (rule_kif->pfik_group != NULL) 200 TAILQ_FOREACH(p, &packet_kif->pfik_ifp->if_groups, ifgl_next) 201 if (p->ifgl_group == rule_kif->pfik_group) 202 return (1); 203 204 return (0); 205 } 206 207 void 208 pfi_attach_ifnet(struct ifnet *ifp) 209 { 210 struct pfi_kif *kif; 211 int s; 212 213 pfi_initialize(); 214 s = splsoftnet(); 215 pfi_update++; 216 if ((kif = pfi_kif_get(ifp->if_xname)) == NULL) 217 panic("pfi_kif_get failed"); 218 219 kif->pfik_ifp = ifp; 220 ifp->if_pf_kif = (caddr_t)kif; 221 222 if ((kif->pfik_ah_cookie = hook_establish(ifp->if_addrhooks, 1, 223 pfi_kifaddr_update, kif)) == NULL) 224 panic("pfi_attach_ifnet: cannot allocate '%s' address hook", 225 ifp->if_xname); 226 227 pfi_kif_update(kif); 228 229 splx(s); 230 } 231 232 void 233 pfi_detach_ifnet(struct ifnet *ifp) 234 { 235 int s; 236 struct pfi_kif *kif; 237 238 if ((kif = (struct pfi_kif *)ifp->if_pf_kif) == NULL) 239 return; 240 241 s = splsoftnet(); 242 pfi_update++; 243 hook_disestablish(ifp->if_addrhooks, kif->pfik_ah_cookie); 244 pfi_kif_update(kif); 245 246 kif->pfik_ifp = NULL; 247 ifp->if_pf_kif = NULL; 248 pfi_kif_unref(kif, PFI_KIF_REF_NONE); 249 splx(s); 250 } 251 252 void 253 pfi_attach_ifgroup(struct ifg_group *ifg) 254 { 255 struct pfi_kif *kif; 256 int s; 257 258 pfi_initialize(); 259 s = splsoftnet(); 260 pfi_update++; 261 if ((kif = pfi_kif_get(ifg->ifg_group)) == NULL) 262 panic("pfi_kif_get failed"); 263 264 kif->pfik_group = ifg; 265 ifg->ifg_pf_kif = (caddr_t)kif; 266 267 splx(s); 268 } 269 270 void 271 pfi_detach_ifgroup(struct ifg_group *ifg) 272 { 273 int s; 274 struct pfi_kif *kif; 275 276 if ((kif = (struct pfi_kif *)ifg->ifg_pf_kif) == NULL) 277 return; 278 279 s = splsoftnet(); 280 pfi_update++; 281 282 kif->pfik_group = NULL; 283 ifg->ifg_pf_kif = NULL; 284 pfi_kif_unref(kif, PFI_KIF_REF_NONE); 285 splx(s); 286 } 287 288 void 289 pfi_group_change(const char *group) 290 { 291 struct pfi_kif *kif; 292 int s; 293 294 s = splsoftnet(); 295 pfi_update++; 296 if ((kif = pfi_kif_get(group)) == NULL) 297 panic("pfi_kif_get failed"); 298 299 pfi_kif_update(kif); 300 301 splx(s); 302 } 303 304 int 305 pfi_match_addr(struct pfi_dynaddr *dyn, struct pf_addr *a, sa_family_t af) 306 { 307 switch (af) { 308 #ifdef INET 309 case AF_INET: 310 switch (dyn->pfid_acnt4) { 311 case 0: 312 return (0); 313 case 1: 314 return (PF_MATCHA(0, &dyn->pfid_addr4, 315 &dyn->pfid_mask4, a, AF_INET)); 316 default: 317 return (pfr_match_addr(dyn->pfid_kt, a, AF_INET)); 318 } 319 break; 320 #endif /* INET */ 321 #ifdef INET6 322 case AF_INET6: 323 switch (dyn->pfid_acnt6) { 324 case 0: 325 return (0); 326 case 1: 327 return (PF_MATCHA(0, &dyn->pfid_addr6, 328 &dyn->pfid_mask6, a, AF_INET6)); 329 default: 330 return (pfr_match_addr(dyn->pfid_kt, a, AF_INET6)); 331 } 332 break; 333 #endif /* INET6 */ 334 default: 335 return (0); 336 } 337 } 338 339 int 340 pfi_dynaddr_setup(struct pf_addr_wrap *aw, sa_family_t af) 341 { 342 struct pfi_dynaddr *dyn; 343 char tblname[PF_TABLE_NAME_SIZE]; 344 struct pf_ruleset *ruleset = NULL; 345 int s, rv = 0; 346 347 if (aw->type != PF_ADDR_DYNIFTL) 348 return (0); 349 if ((dyn = pool_get(&pfi_addr_pl, PR_WAITOK | PR_LIMITFAIL | PR_ZERO)) 350 == NULL) 351 return (1); 352 353 s = splsoftnet(); 354 if (!strcmp(aw->v.ifname, "self")) 355 dyn->pfid_kif = pfi_kif_get(IFG_ALL); 356 else 357 dyn->pfid_kif = pfi_kif_get(aw->v.ifname); 358 if (dyn->pfid_kif == NULL) { 359 rv = 1; 360 goto _bad; 361 } 362 pfi_kif_ref(dyn->pfid_kif, PFI_KIF_REF_RULE); 363 364 dyn->pfid_net = pfi_unmask(&aw->v.a.mask); 365 if (af == AF_INET && dyn->pfid_net == 32) 366 dyn->pfid_net = 128; 367 strlcpy(tblname, aw->v.ifname, sizeof(tblname)); 368 if (aw->iflags & PFI_AFLAG_NETWORK) 369 strlcat(tblname, ":network", sizeof(tblname)); 370 if (aw->iflags & PFI_AFLAG_BROADCAST) 371 strlcat(tblname, ":broadcast", sizeof(tblname)); 372 if (aw->iflags & PFI_AFLAG_PEER) 373 strlcat(tblname, ":peer", sizeof(tblname)); 374 if (aw->iflags & PFI_AFLAG_NOALIAS) 375 strlcat(tblname, ":0", sizeof(tblname)); 376 if (dyn->pfid_net != 128) 377 snprintf(tblname + strlen(tblname), 378 sizeof(tblname) - strlen(tblname), "/%d", dyn->pfid_net); 379 if ((ruleset = pf_find_or_create_ruleset(PF_RESERVED_ANCHOR)) == NULL) { 380 rv = 1; 381 goto _bad; 382 } 383 384 if ((dyn->pfid_kt = pfr_attach_table(ruleset, tblname, 1)) == NULL) { 385 rv = 1; 386 goto _bad; 387 } 388 389 dyn->pfid_kt->pfrkt_flags |= PFR_TFLAG_ACTIVE; 390 dyn->pfid_iflags = aw->iflags; 391 dyn->pfid_af = af; 392 393 TAILQ_INSERT_TAIL(&dyn->pfid_kif->pfik_dynaddrs, dyn, entry); 394 aw->p.dyn = dyn; 395 pfi_kif_update(dyn->pfid_kif); 396 splx(s); 397 return (0); 398 399 _bad: 400 if (dyn->pfid_kt != NULL) 401 pfr_detach_table(dyn->pfid_kt); 402 if (ruleset != NULL) 403 pf_remove_if_empty_ruleset(ruleset); 404 if (dyn->pfid_kif != NULL) 405 pfi_kif_unref(dyn->pfid_kif, PFI_KIF_REF_RULE); 406 pool_put(&pfi_addr_pl, dyn); 407 splx(s); 408 return (rv); 409 } 410 411 void 412 pfi_kif_update(struct pfi_kif *kif) 413 { 414 struct ifg_list *ifgl; 415 struct pfi_dynaddr *p; 416 417 /* update all dynaddr */ 418 TAILQ_FOREACH(p, &kif->pfik_dynaddrs, entry) 419 pfi_dynaddr_update(p); 420 421 /* again for all groups kif is member of */ 422 if (kif->pfik_ifp != NULL) 423 TAILQ_FOREACH(ifgl, &kif->pfik_ifp->if_groups, ifgl_next) 424 pfi_kif_update((struct pfi_kif *) 425 ifgl->ifgl_group->ifg_pf_kif); 426 } 427 428 void 429 pfi_dynaddr_update(struct pfi_dynaddr *dyn) 430 { 431 struct pfi_kif *kif; 432 struct pfr_ktable *kt; 433 434 if (dyn == NULL || dyn->pfid_kif == NULL || dyn->pfid_kt == NULL) 435 panic("pfi_dynaddr_update"); 436 437 kif = dyn->pfid_kif; 438 kt = dyn->pfid_kt; 439 440 if (kt->pfrkt_larg != pfi_update) { 441 /* this table needs to be brought up-to-date */ 442 pfi_table_update(kt, kif, dyn->pfid_net, dyn->pfid_iflags); 443 kt->pfrkt_larg = pfi_update; 444 } 445 pfr_dynaddr_update(kt, dyn); 446 } 447 448 void 449 pfi_table_update(struct pfr_ktable *kt, struct pfi_kif *kif, int net, int flags) 450 { 451 int e, size2 = 0; 452 struct ifg_member *ifgm; 453 454 pfi_buffer_cnt = 0; 455 456 if (kif->pfik_ifp != NULL) 457 pfi_instance_add(kif->pfik_ifp, net, flags); 458 else if (kif->pfik_group != NULL) 459 TAILQ_FOREACH(ifgm, &kif->pfik_group->ifg_members, ifgm_next) 460 pfi_instance_add(ifgm->ifgm_ifp, net, flags); 461 462 if ((e = pfr_set_addrs(&kt->pfrkt_t, pfi_buffer, pfi_buffer_cnt, &size2, 463 NULL, NULL, NULL, 0, PFR_TFLAG_ALLMASK))) 464 DPFPRINTF(LOG_ERR, 465 "pfi_table_update: cannot set %d new addresses " 466 "into table %s: %d", pfi_buffer_cnt, kt->pfrkt_name, e); 467 } 468 469 void 470 pfi_instance_add(struct ifnet *ifp, int net, int flags) 471 { 472 struct ifaddr *ia; 473 int got4 = 0, got6 = 0; 474 int net2, af; 475 476 if (ifp == NULL) 477 return; 478 TAILQ_FOREACH(ia, &ifp->if_addrlist, ifa_list) { 479 if (ia->ifa_addr == NULL) 480 continue; 481 af = ia->ifa_addr->sa_family; 482 if (af != AF_INET && af != AF_INET6) 483 continue; 484 if ((flags & PFI_AFLAG_BROADCAST) && af == AF_INET6) 485 continue; 486 if ((flags & PFI_AFLAG_BROADCAST) && 487 !(ifp->if_flags & IFF_BROADCAST)) 488 continue; 489 if ((flags & PFI_AFLAG_PEER) && 490 !(ifp->if_flags & IFF_POINTOPOINT)) 491 continue; 492 if ((flags & PFI_AFLAG_NETWORK) && af == AF_INET6 && 493 IN6_IS_ADDR_LINKLOCAL( 494 &((struct sockaddr_in6 *)ia->ifa_addr)->sin6_addr)) 495 continue; 496 if (flags & PFI_AFLAG_NOALIAS) { 497 if (af == AF_INET && got4) 498 continue; 499 if (af == AF_INET6 && got6) 500 continue; 501 } 502 if (af == AF_INET) 503 got4 = 1; 504 else if (af == AF_INET6) 505 got6 = 1; 506 net2 = net; 507 if (net2 == 128 && (flags & PFI_AFLAG_NETWORK)) { 508 if (af == AF_INET) 509 net2 = pfi_unmask(&((struct sockaddr_in *) 510 ia->ifa_netmask)->sin_addr); 511 else if (af == AF_INET6) 512 net2 = pfi_unmask(&((struct sockaddr_in6 *) 513 ia->ifa_netmask)->sin6_addr); 514 } 515 if (af == AF_INET && net2 > 32) 516 net2 = 32; 517 if (flags & PFI_AFLAG_BROADCAST) 518 pfi_address_add(ia->ifa_broadaddr, af, net2); 519 else if (flags & PFI_AFLAG_PEER) 520 pfi_address_add(ia->ifa_dstaddr, af, net2); 521 else 522 pfi_address_add(ia->ifa_addr, af, net2); 523 } 524 } 525 526 void 527 pfi_address_add(struct sockaddr *sa, int af, int net) 528 { 529 struct pfr_addr *p; 530 int i; 531 532 if (pfi_buffer_cnt >= pfi_buffer_max) { 533 int new_max = pfi_buffer_max * 2; 534 535 if (new_max > PFI_BUFFER_MAX) { 536 DPFPRINTF(LOG_ERR, 537 "pfi_address_add: address buffer full (%d/%d)", 538 pfi_buffer_cnt, PFI_BUFFER_MAX); 539 return; 540 } 541 p = malloc(new_max * sizeof(*pfi_buffer), PFI_MTYPE, 542 M_DONTWAIT); 543 if (p == NULL) { 544 DPFPRINTF(LOG_ERR, 545 "pfi_address_add: no memory to grow buffer " 546 "(%d/%d)", pfi_buffer_cnt, PFI_BUFFER_MAX); 547 return; 548 } 549 memcpy(p, pfi_buffer, pfi_buffer_max * sizeof(*pfi_buffer)); 550 /* no need to zero buffer */ 551 free(pfi_buffer, PFI_MTYPE); 552 pfi_buffer = p; 553 pfi_buffer_max = new_max; 554 } 555 if (af == AF_INET && net > 32) 556 net = 128; 557 p = pfi_buffer + pfi_buffer_cnt++; 558 bzero(p, sizeof(*p)); 559 p->pfra_af = af; 560 p->pfra_net = net; 561 if (af == AF_INET) 562 p->pfra_ip4addr = ((struct sockaddr_in *)sa)->sin_addr; 563 else if (af == AF_INET6) { 564 p->pfra_ip6addr = ((struct sockaddr_in6 *)sa)->sin6_addr; 565 if (IN6_IS_SCOPE_EMBED(&p->pfra_ip6addr)) 566 p->pfra_ip6addr.s6_addr16[1] = 0; 567 } 568 /* mask network address bits */ 569 if (net < 128) 570 ((caddr_t)p)[p->pfra_net/8] &= ~(0xFF >> (p->pfra_net%8)); 571 for (i = (p->pfra_net+7)/8; i < sizeof(p->pfra_u); i++) 572 ((caddr_t)p)[i] = 0; 573 } 574 575 void 576 pfi_dynaddr_remove(struct pf_addr_wrap *aw) 577 { 578 int s; 579 580 if (aw->type != PF_ADDR_DYNIFTL || aw->p.dyn == NULL || 581 aw->p.dyn->pfid_kif == NULL || aw->p.dyn->pfid_kt == NULL) 582 return; 583 584 s = splsoftnet(); 585 TAILQ_REMOVE(&aw->p.dyn->pfid_kif->pfik_dynaddrs, aw->p.dyn, entry); 586 pfi_kif_unref(aw->p.dyn->pfid_kif, PFI_KIF_REF_RULE); 587 aw->p.dyn->pfid_kif = NULL; 588 pfr_detach_table(aw->p.dyn->pfid_kt); 589 aw->p.dyn->pfid_kt = NULL; 590 pool_put(&pfi_addr_pl, aw->p.dyn); 591 aw->p.dyn = NULL; 592 splx(s); 593 } 594 595 void 596 pfi_dynaddr_copyout(struct pf_addr_wrap *aw) 597 { 598 if (aw->type != PF_ADDR_DYNIFTL || aw->p.dyn == NULL || 599 aw->p.dyn->pfid_kif == NULL) 600 return; 601 aw->p.dyncnt = aw->p.dyn->pfid_acnt4 + aw->p.dyn->pfid_acnt6; 602 } 603 604 void 605 pfi_kifaddr_update(void *v) 606 { 607 int s; 608 struct pfi_kif *kif = (struct pfi_kif *)v; 609 610 s = splsoftnet(); 611 pfi_update++; 612 pfi_kif_update(kif); 613 splx(s); 614 } 615 616 int 617 pfi_if_compare(struct pfi_kif *p, struct pfi_kif *q) 618 { 619 return (strncmp(p->pfik_name, q->pfik_name, IFNAMSIZ)); 620 } 621 622 void 623 pfi_update_status(const char *name, struct pf_status *pfs) 624 { 625 struct pfi_kif *p; 626 struct pfi_kif_cmp key; 627 struct ifg_member p_member, *ifgm; 628 TAILQ_HEAD(, ifg_member) ifg_members; 629 int i, j, k, s; 630 631 s = splsoftnet(); 632 if (*name == '\0' && pfs == NULL) { 633 RB_FOREACH(p, pfi_ifhead, &pfi_ifs) { 634 bzero(p->pfik_packets, sizeof(p->pfik_packets)); 635 bzero(p->pfik_bytes, sizeof(p->pfik_bytes)); 636 p->pfik_tzero = time_second; 637 } 638 return; 639 } 640 641 strlcpy(key.pfik_name, name, sizeof(key.pfik_name)); 642 p = RB_FIND(pfi_ifhead, &pfi_ifs, (struct pfi_kif *)&key); 643 if (p == NULL) { 644 splx(s); 645 return; 646 } 647 if (p->pfik_group != NULL) { 648 bcopy(&p->pfik_group->ifg_members, &ifg_members, 649 sizeof(ifg_members)); 650 } else { 651 /* build a temporary list for p only */ 652 bzero(&p_member, sizeof(p_member)); 653 p_member.ifgm_ifp = p->pfik_ifp; 654 TAILQ_INIT(&ifg_members); 655 TAILQ_INSERT_TAIL(&ifg_members, &p_member, ifgm_next); 656 } 657 if (pfs) { 658 bzero(pfs->pcounters, sizeof(pfs->pcounters)); 659 bzero(pfs->bcounters, sizeof(pfs->bcounters)); 660 } 661 TAILQ_FOREACH(ifgm, &ifg_members, ifgm_next) { 662 if (ifgm->ifgm_ifp == NULL) 663 continue; 664 p = (struct pfi_kif *)ifgm->ifgm_ifp->if_pf_kif; 665 666 /* just clear statistics */ 667 if (pfs == NULL) { 668 bzero(p->pfik_packets, sizeof(p->pfik_packets)); 669 bzero(p->pfik_bytes, sizeof(p->pfik_bytes)); 670 p->pfik_tzero = time_second; 671 continue; 672 } 673 for (i = 0; i < 2; i++) 674 for (j = 0; j < 2; j++) 675 for (k = 0; k < 2; k++) { 676 pfs->pcounters[i][j][k] += 677 p->pfik_packets[i][j][k]; 678 pfs->bcounters[i][j] += 679 p->pfik_bytes[i][j][k]; 680 } 681 } 682 splx(s); 683 } 684 685 int 686 pfi_get_ifaces(const char *name, struct pfi_kif *buf, int *size) 687 { 688 struct pfi_kif *p, *nextp; 689 int s, n = 0; 690 691 s = splsoftnet(); 692 for (p = RB_MIN(pfi_ifhead, &pfi_ifs); p; p = nextp) { 693 nextp = RB_NEXT(pfi_ifhead, &pfi_ifs, p); 694 if (pfi_skip_if(name, p)) 695 continue; 696 if (*size > n++) { 697 if (!p->pfik_tzero) 698 p->pfik_tzero = time_second; 699 pfi_kif_ref(p, PFI_KIF_REF_RULE); 700 if (copyout(p, buf++, sizeof(*buf))) { 701 pfi_kif_unref(p, PFI_KIF_REF_RULE); 702 splx(s); 703 return (EFAULT); 704 } 705 nextp = RB_NEXT(pfi_ifhead, &pfi_ifs, p); 706 pfi_kif_unref(p, PFI_KIF_REF_RULE); 707 } 708 } 709 splx(s); 710 *size = n; 711 return (0); 712 } 713 714 int 715 pfi_skip_if(const char *filter, struct pfi_kif *p) 716 { 717 struct ifg_list *i; 718 int n; 719 720 if (filter == NULL || !*filter) 721 return (0); 722 if (!strcmp(p->pfik_name, filter)) 723 return (0); /* exact match */ 724 n = strlen(filter); 725 if (n < 1 || n >= IFNAMSIZ) 726 return (1); /* sanity check */ 727 if (filter[n-1] >= '0' && filter[n-1] <= '9') 728 return (1); /* group names may not end in a digit */ 729 if (p->pfik_ifp != NULL) 730 TAILQ_FOREACH(i, &p->pfik_ifp->if_groups, ifgl_next) 731 if (!strncmp(i->ifgl_group->ifg_group, filter, IFNAMSIZ)) 732 return (0); /* iface is in group "filter" */ 733 return (1); 734 } 735 736 int 737 pfi_set_flags(const char *name, int flags) 738 { 739 struct pfi_kif *p; 740 int s; 741 742 s = splsoftnet(); 743 RB_FOREACH(p, pfi_ifhead, &pfi_ifs) { 744 if (pfi_skip_if(name, p)) 745 continue; 746 p->pfik_flags_new = p->pfik_flags | flags; 747 } 748 splx(s); 749 return (0); 750 } 751 752 int 753 pfi_clear_flags(const char *name, int flags) 754 { 755 struct pfi_kif *p; 756 int s; 757 758 s = splsoftnet(); 759 RB_FOREACH(p, pfi_ifhead, &pfi_ifs) { 760 if (pfi_skip_if(name, p)) 761 continue; 762 p->pfik_flags_new = p->pfik_flags & ~flags; 763 } 764 splx(s); 765 return (0); 766 } 767 768 void 769 pfi_xcommit(void) 770 { 771 struct pfi_kif *p; 772 int s; 773 774 s = splsoftnet(); 775 RB_FOREACH(p, pfi_ifhead, &pfi_ifs) 776 p->pfik_flags = p->pfik_flags_new; 777 splx(s); 778 } 779 780 /* from pf_print_state.c */ 781 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