1 /* $OpenBSD: pf_if.c,v 1.73 2014/07/12 18:44:22 tedu 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_systm.h> 52 #include <netinet/ip.h> 53 #include <netinet/ip_var.h> 54 55 #include <net/pfvar.h> 56 57 #ifdef INET6 58 #include <netinet/ip6.h> 59 #endif /* INET6 */ 60 61 struct pfi_kif *pfi_all = NULL; 62 struct pool pfi_addr_pl; 63 struct pfi_ifhead pfi_ifs; 64 long pfi_update = 1; 65 struct pfr_addr *pfi_buffer; 66 int pfi_buffer_cnt; 67 int pfi_buffer_max; 68 69 void pfi_kif_update(struct pfi_kif *); 70 void pfi_dynaddr_update(struct pfi_dynaddr *dyn); 71 void pfi_table_update(struct pfr_ktable *, struct pfi_kif *, 72 int, int); 73 void pfi_kifaddr_update(void *); 74 void pfi_instance_add(struct ifnet *, int, int); 75 void pfi_address_add(struct sockaddr *, int, int); 76 int pfi_if_compare(struct pfi_kif *, struct pfi_kif *); 77 int pfi_skip_if(const char *, struct pfi_kif *); 78 int pfi_unmask(void *); 79 80 RB_PROTOTYPE(pfi_ifhead, pfi_kif, pfik_tree, pfi_if_compare); 81 RB_GENERATE(pfi_ifhead, pfi_kif, pfik_tree, pfi_if_compare); 82 83 #define PFI_BUFFER_MAX 0x10000 84 #define PFI_MTYPE M_IFADDR 85 86 void 87 pfi_initialize(void) 88 { 89 if (pfi_all != NULL) /* already initialized */ 90 return; 91 92 pool_init(&pfi_addr_pl, sizeof(struct pfi_dynaddr), 0, 0, 0, 93 "pfiaddrpl", &pool_allocator_nointr); 94 pfi_buffer_max = 64; 95 pfi_buffer = malloc(pfi_buffer_max * sizeof(*pfi_buffer), 96 PFI_MTYPE, M_WAITOK); 97 98 if ((pfi_all = pfi_kif_get(IFG_ALL)) == NULL) 99 panic("pfi_kif_get for pfi_all failed"); 100 } 101 102 struct pfi_kif * 103 pfi_kif_get(const char *kif_name) 104 { 105 struct pfi_kif *kif; 106 struct pfi_kif_cmp s; 107 108 bzero(&s, sizeof(s)); 109 strlcpy(s.pfik_name, kif_name, sizeof(s.pfik_name)); 110 if ((kif = RB_FIND(pfi_ifhead, &pfi_ifs, (struct pfi_kif *)&s)) != NULL) 111 return (kif); 112 113 /* create new one */ 114 if ((kif = malloc(sizeof(*kif), PFI_MTYPE, M_NOWAIT|M_ZERO)) == NULL) 115 return (NULL); 116 117 strlcpy(kif->pfik_name, kif_name, sizeof(kif->pfik_name)); 118 kif->pfik_tzero = time_second; 119 TAILQ_INIT(&kif->pfik_dynaddrs); 120 121 if (!strcmp(kif->pfik_name, "any")) { 122 /* both so it works in the ioctl and the regular case */ 123 kif->pfik_flags |= PFI_IFLAG_ANY; 124 kif->pfik_flags_new |= PFI_IFLAG_ANY; 125 } 126 127 RB_INSERT(pfi_ifhead, &pfi_ifs, kif); 128 return (kif); 129 } 130 131 void 132 pfi_kif_ref(struct pfi_kif *kif, enum pfi_kif_refs what) 133 { 134 switch (what) { 135 case PFI_KIF_REF_RULE: 136 kif->pfik_rules++; 137 break; 138 case PFI_KIF_REF_STATE: 139 kif->pfik_states++; 140 break; 141 case PFI_KIF_REF_ROUTE: 142 kif->pfik_routes++; 143 break; 144 default: 145 panic("pfi_kif_ref with unknown type"); 146 } 147 } 148 149 void 150 pfi_kif_unref(struct pfi_kif *kif, enum pfi_kif_refs what) 151 { 152 if (kif == NULL) 153 return; 154 155 switch (what) { 156 case PFI_KIF_REF_NONE: 157 break; 158 case PFI_KIF_REF_RULE: 159 if (kif->pfik_rules <= 0) { 160 DPFPRINTF(LOG_ERR, 161 "pfi_kif_unref: rules refcount <= 0"); 162 return; 163 } 164 kif->pfik_rules--; 165 break; 166 case PFI_KIF_REF_STATE: 167 if (kif->pfik_states <= 0) { 168 DPFPRINTF(LOG_ERR, 169 "pfi_kif_unref: state refcount <= 0"); 170 return; 171 } 172 kif->pfik_states--; 173 break; 174 case PFI_KIF_REF_ROUTE: 175 if (kif->pfik_routes <= 0) { 176 DPFPRINTF(LOG_ERR, 177 "pfi_kif_unref: state refcount <= 0"); 178 return; 179 } 180 kif->pfik_routes--; 181 break; 182 default: 183 panic("pfi_kif_unref with unknown type"); 184 } 185 186 if (kif->pfik_ifp != NULL || kif->pfik_group != NULL || kif == pfi_all) 187 return; 188 189 if (kif->pfik_rules || kif->pfik_states || kif->pfik_routes) 190 return; 191 192 RB_REMOVE(pfi_ifhead, &pfi_ifs, kif); 193 free(kif, PFI_MTYPE, 0); 194 } 195 196 int 197 pfi_kif_match(struct pfi_kif *rule_kif, struct pfi_kif *packet_kif) 198 { 199 struct ifg_list *p; 200 201 if (rule_kif == NULL || rule_kif == packet_kif) 202 return (1); 203 204 if (rule_kif->pfik_group != NULL) 205 TAILQ_FOREACH(p, &packet_kif->pfik_ifp->if_groups, ifgl_next) 206 if (p->ifgl_group == rule_kif->pfik_group) 207 return (1); 208 209 if (rule_kif->pfik_flags & PFI_IFLAG_ANY && packet_kif->pfik_ifp && 210 !(packet_kif->pfik_ifp->if_flags & IFF_LOOPBACK)) 211 return (1); 212 213 return (0); 214 } 215 216 void 217 pfi_attach_ifnet(struct ifnet *ifp) 218 { 219 struct pfi_kif *kif; 220 int s; 221 222 pfi_initialize(); 223 s = splsoftnet(); 224 pfi_update++; 225 if ((kif = pfi_kif_get(ifp->if_xname)) == NULL) 226 panic("pfi_kif_get failed"); 227 228 kif->pfik_ifp = ifp; 229 ifp->if_pf_kif = (caddr_t)kif; 230 231 if ((kif->pfik_ah_cookie = hook_establish(ifp->if_addrhooks, 1, 232 pfi_kifaddr_update, kif)) == NULL) 233 panic("pfi_attach_ifnet: cannot allocate '%s' address hook", 234 ifp->if_xname); 235 236 pfi_kif_update(kif); 237 238 splx(s); 239 } 240 241 void 242 pfi_detach_ifnet(struct ifnet *ifp) 243 { 244 int s; 245 struct pfi_kif *kif; 246 247 if ((kif = (struct pfi_kif *)ifp->if_pf_kif) == NULL) 248 return; 249 250 s = splsoftnet(); 251 pfi_update++; 252 hook_disestablish(ifp->if_addrhooks, kif->pfik_ah_cookie); 253 pfi_kif_update(kif); 254 255 if (HFSC_ENABLED(&ifp->if_snd)) { 256 pf_remove_queues(ifp); 257 pf_free_queues(pf_queues_active, ifp); 258 } 259 260 kif->pfik_ifp = NULL; 261 ifp->if_pf_kif = NULL; 262 pfi_kif_unref(kif, PFI_KIF_REF_NONE); 263 264 splx(s); 265 } 266 267 void 268 pfi_attach_ifgroup(struct ifg_group *ifg) 269 { 270 struct pfi_kif *kif; 271 int s; 272 273 pfi_initialize(); 274 s = splsoftnet(); 275 pfi_update++; 276 if ((kif = pfi_kif_get(ifg->ifg_group)) == NULL) 277 panic("pfi_kif_get failed"); 278 279 kif->pfik_group = ifg; 280 ifg->ifg_pf_kif = (caddr_t)kif; 281 282 splx(s); 283 } 284 285 void 286 pfi_detach_ifgroup(struct ifg_group *ifg) 287 { 288 int s; 289 struct pfi_kif *kif; 290 291 if ((kif = (struct pfi_kif *)ifg->ifg_pf_kif) == NULL) 292 return; 293 294 s = splsoftnet(); 295 pfi_update++; 296 297 kif->pfik_group = NULL; 298 ifg->ifg_pf_kif = NULL; 299 pfi_kif_unref(kif, PFI_KIF_REF_NONE); 300 splx(s); 301 } 302 303 void 304 pfi_group_change(const char *group) 305 { 306 struct pfi_kif *kif; 307 int s; 308 309 s = splsoftnet(); 310 pfi_update++; 311 if ((kif = pfi_kif_get(group)) == NULL) 312 panic("pfi_kif_get failed"); 313 314 pfi_kif_update(kif); 315 316 splx(s); 317 } 318 319 int 320 pfi_match_addr(struct pfi_dynaddr *dyn, struct pf_addr *a, sa_family_t af) 321 { 322 switch (af) { 323 #ifdef INET 324 case AF_INET: 325 switch (dyn->pfid_acnt4) { 326 case 0: 327 return (0); 328 case 1: 329 return (PF_MATCHA(0, &dyn->pfid_addr4, 330 &dyn->pfid_mask4, a, AF_INET)); 331 default: 332 return (pfr_match_addr(dyn->pfid_kt, a, AF_INET)); 333 } 334 break; 335 #endif /* INET */ 336 #ifdef INET6 337 case AF_INET6: 338 switch (dyn->pfid_acnt6) { 339 case 0: 340 return (0); 341 case 1: 342 return (PF_MATCHA(0, &dyn->pfid_addr6, 343 &dyn->pfid_mask6, a, AF_INET6)); 344 default: 345 return (pfr_match_addr(dyn->pfid_kt, a, AF_INET6)); 346 } 347 break; 348 #endif /* INET6 */ 349 default: 350 return (0); 351 } 352 } 353 354 int 355 pfi_dynaddr_setup(struct pf_addr_wrap *aw, sa_family_t af) 356 { 357 struct pfi_dynaddr *dyn; 358 char tblname[PF_TABLE_NAME_SIZE]; 359 struct pf_ruleset *ruleset = NULL; 360 int s, rv = 0; 361 362 if (aw->type != PF_ADDR_DYNIFTL) 363 return (0); 364 if ((dyn = pool_get(&pfi_addr_pl, PR_WAITOK | PR_LIMITFAIL | PR_ZERO)) 365 == NULL) 366 return (1); 367 368 s = splsoftnet(); 369 if (!strcmp(aw->v.ifname, "self")) 370 dyn->pfid_kif = pfi_kif_get(IFG_ALL); 371 else 372 dyn->pfid_kif = pfi_kif_get(aw->v.ifname); 373 if (dyn->pfid_kif == NULL) { 374 rv = 1; 375 goto _bad; 376 } 377 pfi_kif_ref(dyn->pfid_kif, PFI_KIF_REF_RULE); 378 379 dyn->pfid_net = pfi_unmask(&aw->v.a.mask); 380 if (af == AF_INET && dyn->pfid_net == 32) 381 dyn->pfid_net = 128; 382 strlcpy(tblname, aw->v.ifname, sizeof(tblname)); 383 if (aw->iflags & PFI_AFLAG_NETWORK) 384 strlcat(tblname, ":network", sizeof(tblname)); 385 if (aw->iflags & PFI_AFLAG_BROADCAST) 386 strlcat(tblname, ":broadcast", sizeof(tblname)); 387 if (aw->iflags & PFI_AFLAG_PEER) 388 strlcat(tblname, ":peer", sizeof(tblname)); 389 if (aw->iflags & PFI_AFLAG_NOALIAS) 390 strlcat(tblname, ":0", sizeof(tblname)); 391 if (dyn->pfid_net != 128) 392 snprintf(tblname + strlen(tblname), 393 sizeof(tblname) - strlen(tblname), "/%d", dyn->pfid_net); 394 if ((ruleset = pf_find_or_create_ruleset(PF_RESERVED_ANCHOR)) == NULL) { 395 rv = 1; 396 goto _bad; 397 } 398 399 if ((dyn->pfid_kt = pfr_attach_table(ruleset, tblname, 1)) == NULL) { 400 rv = 1; 401 goto _bad; 402 } 403 404 dyn->pfid_kt->pfrkt_flags |= PFR_TFLAG_ACTIVE; 405 dyn->pfid_iflags = aw->iflags; 406 dyn->pfid_af = af; 407 408 TAILQ_INSERT_TAIL(&dyn->pfid_kif->pfik_dynaddrs, dyn, entry); 409 aw->p.dyn = dyn; 410 pfi_kif_update(dyn->pfid_kif); 411 splx(s); 412 return (0); 413 414 _bad: 415 if (dyn->pfid_kt != NULL) 416 pfr_detach_table(dyn->pfid_kt); 417 if (ruleset != NULL) 418 pf_remove_if_empty_ruleset(ruleset); 419 if (dyn->pfid_kif != NULL) 420 pfi_kif_unref(dyn->pfid_kif, PFI_KIF_REF_RULE); 421 pool_put(&pfi_addr_pl, dyn); 422 splx(s); 423 return (rv); 424 } 425 426 void 427 pfi_kif_update(struct pfi_kif *kif) 428 { 429 struct ifg_list *ifgl; 430 struct pfi_dynaddr *p; 431 432 /* update all dynaddr */ 433 TAILQ_FOREACH(p, &kif->pfik_dynaddrs, entry) 434 pfi_dynaddr_update(p); 435 436 /* again for all groups kif is member of */ 437 if (kif->pfik_ifp != NULL) 438 TAILQ_FOREACH(ifgl, &kif->pfik_ifp->if_groups, ifgl_next) 439 pfi_kif_update((struct pfi_kif *) 440 ifgl->ifgl_group->ifg_pf_kif); 441 } 442 443 void 444 pfi_dynaddr_update(struct pfi_dynaddr *dyn) 445 { 446 struct pfi_kif *kif; 447 struct pfr_ktable *kt; 448 449 if (dyn == NULL || dyn->pfid_kif == NULL || dyn->pfid_kt == NULL) 450 panic("pfi_dynaddr_update"); 451 452 kif = dyn->pfid_kif; 453 kt = dyn->pfid_kt; 454 455 if (kt->pfrkt_larg != pfi_update) { 456 /* this table needs to be brought up-to-date */ 457 pfi_table_update(kt, kif, dyn->pfid_net, dyn->pfid_iflags); 458 kt->pfrkt_larg = pfi_update; 459 } 460 pfr_dynaddr_update(kt, dyn); 461 } 462 463 void 464 pfi_table_update(struct pfr_ktable *kt, struct pfi_kif *kif, int net, int flags) 465 { 466 int e, size2 = 0; 467 struct ifg_member *ifgm; 468 469 pfi_buffer_cnt = 0; 470 471 if (kif->pfik_ifp != NULL) 472 pfi_instance_add(kif->pfik_ifp, net, flags); 473 else if (kif->pfik_group != NULL) 474 TAILQ_FOREACH(ifgm, &kif->pfik_group->ifg_members, ifgm_next) 475 pfi_instance_add(ifgm->ifgm_ifp, net, flags); 476 477 if ((e = pfr_set_addrs(&kt->pfrkt_t, pfi_buffer, pfi_buffer_cnt, &size2, 478 NULL, NULL, NULL, 0, PFR_TFLAG_ALLMASK))) 479 DPFPRINTF(LOG_ERR, 480 "pfi_table_update: cannot set %d new addresses " 481 "into table %s: %d", pfi_buffer_cnt, kt->pfrkt_name, e); 482 } 483 484 void 485 pfi_instance_add(struct ifnet *ifp, int net, int flags) 486 { 487 struct ifaddr *ifa; 488 int got4 = 0, got6 = 0; 489 int net2, af; 490 491 if (ifp == NULL) 492 return; 493 TAILQ_FOREACH(ifa, &ifp->if_addrlist, ifa_list) { 494 if (ifa->ifa_addr == NULL) 495 continue; 496 af = ifa->ifa_addr->sa_family; 497 if (af != AF_INET && af != AF_INET6) 498 continue; 499 if ((flags & PFI_AFLAG_BROADCAST) && af == AF_INET6) 500 continue; 501 if ((flags & PFI_AFLAG_BROADCAST) && 502 !(ifp->if_flags & IFF_BROADCAST)) 503 continue; 504 if ((flags & PFI_AFLAG_PEER) && 505 !(ifp->if_flags & IFF_POINTOPOINT)) 506 continue; 507 if ((flags & PFI_AFLAG_NETWORK) && af == AF_INET6 && 508 IN6_IS_ADDR_LINKLOCAL( 509 &((struct sockaddr_in6 *)ifa->ifa_addr)->sin6_addr)) 510 continue; 511 if (flags & PFI_AFLAG_NOALIAS) { 512 if (af == AF_INET && got4) 513 continue; 514 if (af == AF_INET6 && got6) 515 continue; 516 } 517 if (af == AF_INET) 518 got4 = 1; 519 else if (af == AF_INET6) 520 got6 = 1; 521 net2 = net; 522 if (net2 == 128 && (flags & PFI_AFLAG_NETWORK)) { 523 if (af == AF_INET) 524 net2 = pfi_unmask(&((struct sockaddr_in *) 525 ifa->ifa_netmask)->sin_addr); 526 else if (af == AF_INET6) 527 net2 = pfi_unmask(&((struct sockaddr_in6 *) 528 ifa->ifa_netmask)->sin6_addr); 529 } 530 if (af == AF_INET && net2 > 32) 531 net2 = 32; 532 if (flags & PFI_AFLAG_BROADCAST) 533 pfi_address_add(ifa->ifa_broadaddr, af, net2); 534 else if (flags & PFI_AFLAG_PEER) 535 pfi_address_add(ifa->ifa_dstaddr, af, net2); 536 else 537 pfi_address_add(ifa->ifa_addr, af, net2); 538 } 539 } 540 541 void 542 pfi_address_add(struct sockaddr *sa, int af, int net) 543 { 544 struct pfr_addr *p; 545 int i; 546 547 if (pfi_buffer_cnt >= pfi_buffer_max) { 548 int new_max = pfi_buffer_max * 2; 549 550 if (new_max > PFI_BUFFER_MAX) { 551 DPFPRINTF(LOG_ERR, 552 "pfi_address_add: address buffer full (%d/%d)", 553 pfi_buffer_cnt, PFI_BUFFER_MAX); 554 return; 555 } 556 p = malloc(new_max * sizeof(*pfi_buffer), PFI_MTYPE, 557 M_DONTWAIT); 558 if (p == NULL) { 559 DPFPRINTF(LOG_ERR, 560 "pfi_address_add: no memory to grow buffer " 561 "(%d/%d)", pfi_buffer_cnt, PFI_BUFFER_MAX); 562 return; 563 } 564 memcpy(p, pfi_buffer, pfi_buffer_max * sizeof(*pfi_buffer)); 565 /* no need to zero buffer */ 566 free(pfi_buffer, PFI_MTYPE, 0); 567 pfi_buffer = p; 568 pfi_buffer_max = new_max; 569 } 570 if (af == AF_INET && net > 32) 571 net = 128; 572 p = pfi_buffer + pfi_buffer_cnt++; 573 bzero(p, sizeof(*p)); 574 p->pfra_af = af; 575 p->pfra_net = net; 576 if (af == AF_INET) 577 p->pfra_ip4addr = ((struct sockaddr_in *)sa)->sin_addr; 578 else if (af == AF_INET6) { 579 p->pfra_ip6addr = ((struct sockaddr_in6 *)sa)->sin6_addr; 580 if (IN6_IS_SCOPE_EMBED(&p->pfra_ip6addr)) 581 p->pfra_ip6addr.s6_addr16[1] = 0; 582 } 583 /* mask network address bits */ 584 if (net < 128) 585 ((caddr_t)p)[p->pfra_net/8] &= ~(0xFF >> (p->pfra_net%8)); 586 for (i = (p->pfra_net+7)/8; i < sizeof(p->pfra_u); i++) 587 ((caddr_t)p)[i] = 0; 588 } 589 590 void 591 pfi_dynaddr_remove(struct pf_addr_wrap *aw) 592 { 593 int s; 594 595 if (aw->type != PF_ADDR_DYNIFTL || aw->p.dyn == NULL || 596 aw->p.dyn->pfid_kif == NULL || aw->p.dyn->pfid_kt == NULL) 597 return; 598 599 s = splsoftnet(); 600 TAILQ_REMOVE(&aw->p.dyn->pfid_kif->pfik_dynaddrs, aw->p.dyn, entry); 601 pfi_kif_unref(aw->p.dyn->pfid_kif, PFI_KIF_REF_RULE); 602 aw->p.dyn->pfid_kif = NULL; 603 pfr_detach_table(aw->p.dyn->pfid_kt); 604 aw->p.dyn->pfid_kt = NULL; 605 pool_put(&pfi_addr_pl, aw->p.dyn); 606 aw->p.dyn = NULL; 607 splx(s); 608 } 609 610 void 611 pfi_dynaddr_copyout(struct pf_addr_wrap *aw) 612 { 613 if (aw->type != PF_ADDR_DYNIFTL || aw->p.dyn == NULL || 614 aw->p.dyn->pfid_kif == NULL) 615 return; 616 aw->p.dyncnt = aw->p.dyn->pfid_acnt4 + aw->p.dyn->pfid_acnt6; 617 } 618 619 void 620 pfi_kifaddr_update(void *v) 621 { 622 int s; 623 struct pfi_kif *kif = (struct pfi_kif *)v; 624 625 s = splsoftnet(); 626 pfi_update++; 627 pfi_kif_update(kif); 628 splx(s); 629 } 630 631 int 632 pfi_if_compare(struct pfi_kif *p, struct pfi_kif *q) 633 { 634 return (strncmp(p->pfik_name, q->pfik_name, IFNAMSIZ)); 635 } 636 637 void 638 pfi_update_status(const char *name, struct pf_status *pfs) 639 { 640 struct pfi_kif *p; 641 struct pfi_kif_cmp key; 642 struct ifg_member p_member, *ifgm; 643 TAILQ_HEAD(, ifg_member) ifg_members; 644 int i, j, k, s; 645 646 s = splsoftnet(); 647 if (*name == '\0' && pfs == NULL) { 648 RB_FOREACH(p, pfi_ifhead, &pfi_ifs) { 649 bzero(p->pfik_packets, sizeof(p->pfik_packets)); 650 bzero(p->pfik_bytes, sizeof(p->pfik_bytes)); 651 p->pfik_tzero = time_second; 652 } 653 splx(s); 654 return; 655 } 656 657 strlcpy(key.pfik_name, name, sizeof(key.pfik_name)); 658 p = RB_FIND(pfi_ifhead, &pfi_ifs, (struct pfi_kif *)&key); 659 if (p == NULL) { 660 splx(s); 661 return; 662 } 663 if (p->pfik_group != NULL) { 664 memcpy(&ifg_members, &p->pfik_group->ifg_members, 665 sizeof(ifg_members)); 666 } else { 667 /* build a temporary list for p only */ 668 bzero(&p_member, sizeof(p_member)); 669 p_member.ifgm_ifp = p->pfik_ifp; 670 TAILQ_INIT(&ifg_members); 671 TAILQ_INSERT_TAIL(&ifg_members, &p_member, ifgm_next); 672 } 673 if (pfs) { 674 bzero(pfs->pcounters, sizeof(pfs->pcounters)); 675 bzero(pfs->bcounters, sizeof(pfs->bcounters)); 676 } 677 TAILQ_FOREACH(ifgm, &ifg_members, ifgm_next) { 678 if (ifgm->ifgm_ifp == NULL) 679 continue; 680 p = (struct pfi_kif *)ifgm->ifgm_ifp->if_pf_kif; 681 682 /* just clear statistics */ 683 if (pfs == NULL) { 684 bzero(p->pfik_packets, sizeof(p->pfik_packets)); 685 bzero(p->pfik_bytes, sizeof(p->pfik_bytes)); 686 p->pfik_tzero = time_second; 687 continue; 688 } 689 for (i = 0; i < 2; i++) 690 for (j = 0; j < 2; j++) 691 for (k = 0; k < 2; k++) { 692 pfs->pcounters[i][j][k] += 693 p->pfik_packets[i][j][k]; 694 pfs->bcounters[i][j] += 695 p->pfik_bytes[i][j][k]; 696 } 697 } 698 splx(s); 699 } 700 701 int 702 pfi_get_ifaces(const char *name, struct pfi_kif *buf, int *size) 703 { 704 struct pfi_kif *p, *nextp; 705 int s, n = 0; 706 707 s = splsoftnet(); 708 for (p = RB_MIN(pfi_ifhead, &pfi_ifs); p; p = nextp) { 709 nextp = RB_NEXT(pfi_ifhead, &pfi_ifs, p); 710 if (pfi_skip_if(name, p)) 711 continue; 712 if (*size > n++) { 713 if (!p->pfik_tzero) 714 p->pfik_tzero = time_second; 715 pfi_kif_ref(p, PFI_KIF_REF_RULE); 716 if (copyout(p, buf++, sizeof(*buf))) { 717 pfi_kif_unref(p, PFI_KIF_REF_RULE); 718 splx(s); 719 return (EFAULT); 720 } 721 nextp = RB_NEXT(pfi_ifhead, &pfi_ifs, p); 722 pfi_kif_unref(p, PFI_KIF_REF_RULE); 723 } 724 } 725 splx(s); 726 *size = n; 727 return (0); 728 } 729 730 int 731 pfi_skip_if(const char *filter, struct pfi_kif *p) 732 { 733 struct ifg_list *i; 734 int n; 735 736 if (filter == NULL || !*filter) 737 return (0); 738 if (!strcmp(p->pfik_name, filter)) 739 return (0); /* exact match */ 740 n = strlen(filter); 741 if (n < 1 || n >= IFNAMSIZ) 742 return (1); /* sanity check */ 743 if (filter[n-1] >= '0' && filter[n-1] <= '9') 744 return (1); /* group names may not end in a digit */ 745 if (p->pfik_ifp != NULL) 746 TAILQ_FOREACH(i, &p->pfik_ifp->if_groups, ifgl_next) 747 if (!strncmp(i->ifgl_group->ifg_group, filter, IFNAMSIZ)) 748 return (0); /* iface is in group "filter" */ 749 return (1); 750 } 751 752 int 753 pfi_set_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 int 769 pfi_clear_flags(const char *name, int flags) 770 { 771 struct pfi_kif *p; 772 int s; 773 774 s = splsoftnet(); 775 RB_FOREACH(p, pfi_ifhead, &pfi_ifs) { 776 if (pfi_skip_if(name, p)) 777 continue; 778 p->pfik_flags_new = p->pfik_flags & ~flags; 779 } 780 splx(s); 781 return (0); 782 } 783 784 void 785 pfi_xcommit(void) 786 { 787 struct pfi_kif *p; 788 int s; 789 790 s = splsoftnet(); 791 RB_FOREACH(p, pfi_ifhead, &pfi_ifs) 792 p->pfik_flags = p->pfik_flags_new; 793 splx(s); 794 } 795 796 /* from pf_print_state.c */ 797 int 798 pfi_unmask(void *addr) 799 { 800 struct pf_addr *m = addr; 801 int i = 31, j = 0, b = 0; 802 u_int32_t tmp; 803 804 while (j < 4 && m->addr32[j] == 0xffffffff) { 805 b += 32; 806 j++; 807 } 808 if (j < 4) { 809 tmp = ntohl(m->addr32[j]); 810 for (i = 31; tmp & (1 << i); --i) 811 b++; 812 } 813 return (b); 814 } 815 816