pf_if.c revision 1.1.1.4
1 /* $NetBSD: pf_if.c,v 1.1.1.4 2009/12/01 07:03:13 martti Exp $ */ 2 /* $OpenBSD: pf_if.c,v 1.47 2007/07/13 09:17:48 markus Exp $ */ 3 4 /* 5 * Copyright 2005 Henning Brauer <henning (at) openbsd.org> 6 * Copyright 2005 Ryan McBride <mcbride (at) openbsd.org> 7 * Copyright (c) 2001 Daniel Hartmeier 8 * Copyright (c) 2003 Cedric Berger 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 36 #include <sys/param.h> 37 #include <sys/systm.h> 38 #include <sys/mbuf.h> 39 #include <sys/filio.h> 40 #include <sys/socket.h> 41 #include <sys/socketvar.h> 42 #include <sys/kernel.h> 43 #include <sys/device.h> 44 #include <sys/time.h> 45 46 #include <net/if.h> 47 #include <net/if_types.h> 48 49 #include <netinet/in.h> 50 #include <netinet/in_var.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_DONTWAIT)) == NULL) 115 return (NULL); 116 117 bzero(kif, sizeof(*kif)); 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 default: 137 panic("pfi_kif_ref with unknown type"); 138 } 139 } 140 141 void 142 pfi_kif_unref(struct pfi_kif *kif, enum pfi_kif_refs what) 143 { 144 if (kif == NULL) 145 return; 146 147 switch (what) { 148 case PFI_KIF_REF_NONE: 149 break; 150 case PFI_KIF_REF_RULE: 151 if (kif->pfik_rules <= 0) { 152 printf("pfi_kif_unref: rules refcount <= 0\n"); 153 return; 154 } 155 kif->pfik_rules--; 156 break; 157 case PFI_KIF_REF_STATE: 158 if (kif->pfik_states <= 0) { 159 printf("pfi_kif_unref: state refcount <= 0\n"); 160 return; 161 } 162 kif->pfik_states--; 163 break; 164 default: 165 panic("pfi_kif_unref with unknown type"); 166 } 167 168 if (kif->pfik_ifp != NULL || kif->pfik_group != NULL || kif == pfi_all) 169 return; 170 171 if (kif->pfik_rules || kif->pfik_states) 172 return; 173 174 RB_REMOVE(pfi_ifhead, &pfi_ifs, kif); 175 free(kif, PFI_MTYPE); 176 } 177 178 int 179 pfi_kif_match(struct pfi_kif *rule_kif, struct pfi_kif *packet_kif) 180 { 181 struct ifg_list *p; 182 183 if (rule_kif == NULL || rule_kif == packet_kif) 184 return (1); 185 186 if (rule_kif->pfik_group != NULL) 187 TAILQ_FOREACH(p, &packet_kif->pfik_ifp->if_groups, ifgl_next) 188 if (p->ifgl_group == rule_kif->pfik_group) 189 return (1); 190 191 return (0); 192 } 193 194 void 195 pfi_attach_ifnet(struct ifnet *ifp) 196 { 197 struct pfi_kif *kif; 198 int s; 199 200 pfi_initialize(); 201 s = splsoftnet(); 202 pfi_update++; 203 if ((kif = pfi_kif_get(ifp->if_xname)) == NULL) 204 panic("pfi_kif_get failed"); 205 206 kif->pfik_ifp = ifp; 207 ifp->if_pf_kif = (caddr_t)kif; 208 209 if ((kif->pfik_ah_cookie = hook_establish(ifp->if_addrhooks, 1, 210 pfi_kifaddr_update, kif)) == NULL) 211 panic("pfi_attach_ifnet: cannot allocate '%s' address hook", 212 ifp->if_xname); 213 214 pfi_kif_update(kif); 215 216 splx(s); 217 } 218 219 void 220 pfi_detach_ifnet(struct ifnet *ifp) 221 { 222 int s; 223 struct pfi_kif *kif; 224 225 if ((kif = (struct pfi_kif *)ifp->if_pf_kif) == NULL) 226 return; 227 228 s = splsoftnet(); 229 pfi_update++; 230 hook_disestablish(ifp->if_addrhooks, kif->pfik_ah_cookie); 231 pfi_kif_update(kif); 232 233 kif->pfik_ifp = NULL; 234 ifp->if_pf_kif = NULL; 235 pfi_kif_unref(kif, PFI_KIF_REF_NONE); 236 splx(s); 237 } 238 239 void 240 pfi_attach_ifgroup(struct ifg_group *ifg) 241 { 242 struct pfi_kif *kif; 243 int s; 244 245 pfi_initialize(); 246 s = splsoftnet(); 247 pfi_update++; 248 if ((kif = pfi_kif_get(ifg->ifg_group)) == NULL) 249 panic("pfi_kif_get failed"); 250 251 kif->pfik_group = ifg; 252 ifg->ifg_pf_kif = (caddr_t)kif; 253 254 splx(s); 255 } 256 257 void 258 pfi_detach_ifgroup(struct ifg_group *ifg) 259 { 260 int s; 261 struct pfi_kif *kif; 262 263 if ((kif = (struct pfi_kif *)ifg->ifg_pf_kif) == NULL) 264 return; 265 266 s = splsoftnet(); 267 pfi_update++; 268 269 kif->pfik_group = NULL; 270 ifg->ifg_pf_kif = NULL; 271 pfi_kif_unref(kif, PFI_KIF_REF_NONE); 272 splx(s); 273 } 274 275 void 276 pfi_group_change(const char *group) 277 { 278 struct pfi_kif *kif; 279 int s; 280 281 s = splsoftnet(); 282 pfi_update++; 283 if ((kif = pfi_kif_get(group)) == NULL) 284 panic("pfi_kif_get failed"); 285 286 pfi_kif_update(kif); 287 288 splx(s); 289 } 290 291 int 292 pfi_match_addr(struct pfi_dynaddr *dyn, struct pf_addr *a, sa_family_t af) 293 { 294 switch (af) { 295 #ifdef INET 296 case AF_INET: 297 switch (dyn->pfid_acnt4) { 298 case 0: 299 return (0); 300 case 1: 301 return (PF_MATCHA(0, &dyn->pfid_addr4, 302 &dyn->pfid_mask4, a, AF_INET)); 303 default: 304 return (pfr_match_addr(dyn->pfid_kt, a, AF_INET)); 305 } 306 break; 307 #endif /* INET */ 308 #ifdef INET6 309 case AF_INET6: 310 switch (dyn->pfid_acnt6) { 311 case 0: 312 return (0); 313 case 1: 314 return (PF_MATCHA(0, &dyn->pfid_addr6, 315 &dyn->pfid_mask6, a, AF_INET6)); 316 default: 317 return (pfr_match_addr(dyn->pfid_kt, a, AF_INET6)); 318 } 319 break; 320 #endif /* INET6 */ 321 default: 322 return (0); 323 } 324 } 325 326 int 327 pfi_dynaddr_setup(struct pf_addr_wrap *aw, sa_family_t af) 328 { 329 struct pfi_dynaddr *dyn; 330 char tblname[PF_TABLE_NAME_SIZE]; 331 struct pf_ruleset *ruleset = NULL; 332 int s, rv = 0; 333 334 if (aw->type != PF_ADDR_DYNIFTL) 335 return (0); 336 if ((dyn = pool_get(&pfi_addr_pl, PR_NOWAIT)) == NULL) 337 return (1); 338 bzero(dyn, sizeof(*dyn)); 339 340 s = splsoftnet(); 341 if (!strcmp(aw->v.ifname, "self")) 342 dyn->pfid_kif = pfi_kif_get(IFG_ALL); 343 else 344 dyn->pfid_kif = pfi_kif_get(aw->v.ifname); 345 if (dyn->pfid_kif == NULL) { 346 rv = 1; 347 goto _bad; 348 } 349 pfi_kif_ref(dyn->pfid_kif, PFI_KIF_REF_RULE); 350 351 dyn->pfid_net = pfi_unmask(&aw->v.a.mask); 352 if (af == AF_INET && dyn->pfid_net == 32) 353 dyn->pfid_net = 128; 354 strlcpy(tblname, aw->v.ifname, sizeof(tblname)); 355 if (aw->iflags & PFI_AFLAG_NETWORK) 356 strlcat(tblname, ":network", sizeof(tblname)); 357 if (aw->iflags & PFI_AFLAG_BROADCAST) 358 strlcat(tblname, ":broadcast", sizeof(tblname)); 359 if (aw->iflags & PFI_AFLAG_PEER) 360 strlcat(tblname, ":peer", sizeof(tblname)); 361 if (aw->iflags & PFI_AFLAG_NOALIAS) 362 strlcat(tblname, ":0", sizeof(tblname)); 363 if (dyn->pfid_net != 128) 364 snprintf(tblname + strlen(tblname), 365 sizeof(tblname) - strlen(tblname), "/%d", dyn->pfid_net); 366 if ((ruleset = pf_find_or_create_ruleset(PF_RESERVED_ANCHOR)) == NULL) { 367 rv = 1; 368 goto _bad; 369 } 370 371 if ((dyn->pfid_kt = pfr_attach_table(ruleset, tblname)) == NULL) { 372 rv = 1; 373 goto _bad; 374 } 375 376 dyn->pfid_kt->pfrkt_flags |= PFR_TFLAG_ACTIVE; 377 dyn->pfid_iflags = aw->iflags; 378 dyn->pfid_af = af; 379 380 TAILQ_INSERT_TAIL(&dyn->pfid_kif->pfik_dynaddrs, dyn, entry); 381 aw->p.dyn = dyn; 382 pfi_kif_update(dyn->pfid_kif); 383 splx(s); 384 return (0); 385 386 _bad: 387 if (dyn->pfid_kt != NULL) 388 pfr_detach_table(dyn->pfid_kt); 389 if (ruleset != NULL) 390 pf_remove_if_empty_ruleset(ruleset); 391 if (dyn->pfid_kif != NULL) 392 pfi_kif_unref(dyn->pfid_kif, PFI_KIF_REF_RULE); 393 pool_put(&pfi_addr_pl, dyn); 394 splx(s); 395 return (rv); 396 } 397 398 void 399 pfi_kif_update(struct pfi_kif *kif) 400 { 401 struct ifg_list *ifgl; 402 struct pfi_dynaddr *p; 403 404 /* update all dynaddr */ 405 TAILQ_FOREACH(p, &kif->pfik_dynaddrs, entry) 406 pfi_dynaddr_update(p); 407 408 /* again for all groups kif is member of */ 409 if (kif->pfik_ifp != NULL) 410 TAILQ_FOREACH(ifgl, &kif->pfik_ifp->if_groups, ifgl_next) 411 pfi_kif_update((struct pfi_kif *) 412 ifgl->ifgl_group->ifg_pf_kif); 413 } 414 415 void 416 pfi_dynaddr_update(struct pfi_dynaddr *dyn) 417 { 418 struct pfi_kif *kif; 419 struct pfr_ktable *kt; 420 421 if (dyn == NULL || dyn->pfid_kif == NULL || dyn->pfid_kt == NULL) 422 panic("pfi_dynaddr_update"); 423 424 kif = dyn->pfid_kif; 425 kt = dyn->pfid_kt; 426 427 if (kt->pfrkt_larg != pfi_update) { 428 /* this table needs to be brought up-to-date */ 429 pfi_table_update(kt, kif, dyn->pfid_net, dyn->pfid_iflags); 430 kt->pfrkt_larg = pfi_update; 431 } 432 pfr_dynaddr_update(kt, dyn); 433 } 434 435 void 436 pfi_table_update(struct pfr_ktable *kt, struct pfi_kif *kif, int net, int flags) 437 { 438 int e, size2 = 0; 439 struct ifg_member *ifgm; 440 441 pfi_buffer_cnt = 0; 442 443 if (kif->pfik_ifp != NULL) 444 pfi_instance_add(kif->pfik_ifp, net, flags); 445 else if (kif->pfik_group != NULL) 446 TAILQ_FOREACH(ifgm, &kif->pfik_group->ifg_members, ifgm_next) 447 pfi_instance_add(ifgm->ifgm_ifp, net, flags); 448 449 if ((e = pfr_set_addrs(&kt->pfrkt_t, pfi_buffer, pfi_buffer_cnt, &size2, 450 NULL, NULL, NULL, 0, PFR_TFLAG_ALLMASK))) 451 printf("pfi_table_update: cannot set %d new addresses " 452 "into table %s: %d\n", pfi_buffer_cnt, kt->pfrkt_name, e); 453 } 454 455 void 456 pfi_instance_add(struct ifnet *ifp, int net, int flags) 457 { 458 struct ifaddr *ia; 459 int got4 = 0, got6 = 0; 460 int net2, af; 461 462 if (ifp == NULL) 463 return; 464 TAILQ_FOREACH(ia, &ifp->if_addrlist, ifa_list) { 465 if (ia->ifa_addr == NULL) 466 continue; 467 af = ia->ifa_addr->sa_family; 468 if (af != AF_INET && af != AF_INET6) 469 continue; 470 if ((flags & PFI_AFLAG_BROADCAST) && af == AF_INET6) 471 continue; 472 if ((flags & PFI_AFLAG_BROADCAST) && 473 !(ifp->if_flags & IFF_BROADCAST)) 474 continue; 475 if ((flags & PFI_AFLAG_PEER) && 476 !(ifp->if_flags & IFF_POINTOPOINT)) 477 continue; 478 if ((flags & PFI_AFLAG_NETWORK) && af == AF_INET6 && 479 IN6_IS_ADDR_LINKLOCAL( 480 &((struct sockaddr_in6 *)ia->ifa_addr)->sin6_addr)) 481 continue; 482 if (flags & PFI_AFLAG_NOALIAS) { 483 if (af == AF_INET && got4) 484 continue; 485 if (af == AF_INET6 && got6) 486 continue; 487 } 488 if (af == AF_INET) 489 got4 = 1; 490 else if (af == AF_INET6) 491 got6 = 1; 492 net2 = net; 493 if (net2 == 128 && (flags & PFI_AFLAG_NETWORK)) { 494 if (af == AF_INET) 495 net2 = pfi_unmask(&((struct sockaddr_in *) 496 ia->ifa_netmask)->sin_addr); 497 else if (af == AF_INET6) 498 net2 = pfi_unmask(&((struct sockaddr_in6 *) 499 ia->ifa_netmask)->sin6_addr); 500 } 501 if (af == AF_INET && net2 > 32) 502 net2 = 32; 503 if (flags & PFI_AFLAG_BROADCAST) 504 pfi_address_add(ia->ifa_broadaddr, af, net2); 505 else if (flags & PFI_AFLAG_PEER) 506 pfi_address_add(ia->ifa_dstaddr, af, net2); 507 else 508 pfi_address_add(ia->ifa_addr, af, net2); 509 } 510 } 511 512 void 513 pfi_address_add(struct sockaddr *sa, int af, int net) 514 { 515 struct pfr_addr *p; 516 int i; 517 518 if (pfi_buffer_cnt >= pfi_buffer_max) { 519 int new_max = pfi_buffer_max * 2; 520 521 if (new_max > PFI_BUFFER_MAX) { 522 printf("pfi_address_add: address buffer full (%d/%d)\n", 523 pfi_buffer_cnt, PFI_BUFFER_MAX); 524 return; 525 } 526 p = malloc(new_max * sizeof(*pfi_buffer), PFI_MTYPE, 527 M_DONTWAIT); 528 if (p == NULL) { 529 printf("pfi_address_add: no memory to grow buffer " 530 "(%d/%d)\n", pfi_buffer_cnt, PFI_BUFFER_MAX); 531 return; 532 } 533 memcpy(pfi_buffer, p, pfi_buffer_cnt * sizeof(*pfi_buffer)); 534 /* no need to zero buffer */ 535 free(pfi_buffer, PFI_MTYPE); 536 pfi_buffer = p; 537 pfi_buffer_max = new_max; 538 } 539 if (af == AF_INET && net > 32) 540 net = 128; 541 p = pfi_buffer + pfi_buffer_cnt++; 542 bzero(p, sizeof(*p)); 543 p->pfra_af = af; 544 p->pfra_net = net; 545 if (af == AF_INET) 546 p->pfra_ip4addr = ((struct sockaddr_in *)sa)->sin_addr; 547 else if (af == AF_INET6) { 548 p->pfra_ip6addr = ((struct sockaddr_in6 *)sa)->sin6_addr; 549 if (IN6_IS_SCOPE_EMBED(&p->pfra_ip6addr)) 550 p->pfra_ip6addr.s6_addr16[1] = 0; 551 } 552 /* mask network address bits */ 553 if (net < 128) 554 ((caddr_t)p)[p->pfra_net/8] &= ~(0xFF >> (p->pfra_net%8)); 555 for (i = (p->pfra_net+7)/8; i < sizeof(p->pfra_u); i++) 556 ((caddr_t)p)[i] = 0; 557 } 558 559 void 560 pfi_dynaddr_remove(struct pf_addr_wrap *aw) 561 { 562 int s; 563 564 if (aw->type != PF_ADDR_DYNIFTL || aw->p.dyn == NULL || 565 aw->p.dyn->pfid_kif == NULL || aw->p.dyn->pfid_kt == NULL) 566 return; 567 568 s = splsoftnet(); 569 TAILQ_REMOVE(&aw->p.dyn->pfid_kif->pfik_dynaddrs, aw->p.dyn, entry); 570 pfi_kif_unref(aw->p.dyn->pfid_kif, PFI_KIF_REF_RULE); 571 aw->p.dyn->pfid_kif = NULL; 572 pfr_detach_table(aw->p.dyn->pfid_kt); 573 aw->p.dyn->pfid_kt = NULL; 574 pool_put(&pfi_addr_pl, aw->p.dyn); 575 aw->p.dyn = NULL; 576 splx(s); 577 } 578 579 void 580 pfi_dynaddr_copyout(struct pf_addr_wrap *aw) 581 { 582 if (aw->type != PF_ADDR_DYNIFTL || aw->p.dyn == NULL || 583 aw->p.dyn->pfid_kif == NULL) 584 return; 585 aw->p.dyncnt = aw->p.dyn->pfid_acnt4 + aw->p.dyn->pfid_acnt6; 586 } 587 588 void 589 pfi_kifaddr_update(void *v) 590 { 591 int s; 592 struct pfi_kif *kif = (struct pfi_kif *)v; 593 594 s = splsoftnet(); 595 pfi_update++; 596 pfi_kif_update(kif); 597 splx(s); 598 } 599 600 int 601 pfi_if_compare(struct pfi_kif *p, struct pfi_kif *q) 602 { 603 return (strncmp(p->pfik_name, q->pfik_name, IFNAMSIZ)); 604 } 605 606 void 607 pfi_fill_oldstatus(struct pf_status *pfs) 608 { 609 struct pfi_kif *p; 610 struct pfi_kif_cmp key; 611 int i, j, k, s; 612 613 strlcpy(key.pfik_name, pfs->ifname, sizeof(key.pfik_name)); 614 s = splsoftnet(); 615 p = RB_FIND(pfi_ifhead, &pfi_ifs, (struct pfi_kif *)&key); 616 if (p == NULL) { 617 splx(s); 618 return; 619 } 620 bzero(pfs->pcounters, sizeof(pfs->pcounters)); 621 bzero(pfs->bcounters, sizeof(pfs->bcounters)); 622 for (i = 0; i < 2; i++) 623 for (j = 0; j < 2; j++) 624 for (k = 0; k < 2; k++) { 625 pfs->pcounters[i][j][k] = 626 p->pfik_packets[i][j][k]; 627 pfs->bcounters[i][j] += 628 p->pfik_bytes[i][j][k]; 629 } 630 splx(s); 631 } 632 633 int 634 pfi_clr_istats(const char *name) 635 { 636 struct pfi_kif *p; 637 int s; 638 639 s = splsoftnet(); 640 RB_FOREACH(p, pfi_ifhead, &pfi_ifs) { 641 if (pfi_skip_if(name, p)) 642 continue; 643 bzero(p->pfik_packets, sizeof(p->pfik_packets)); 644 bzero(p->pfik_bytes, sizeof(p->pfik_bytes)); 645 p->pfik_tzero = time_second; 646 } 647 splx(s); 648 649 return (0); 650 } 651 652 int 653 pfi_get_ifaces(const char *name, struct pfi_kif *buf, int *size) 654 { 655 struct pfi_kif *p, *nextp; 656 int s, n = 0; 657 658 s = splsoftnet(); 659 for (p = RB_MIN(pfi_ifhead, &pfi_ifs); p; p = nextp) { 660 nextp = RB_NEXT(pfi_ifhead, &pfi_ifs, p); 661 if (pfi_skip_if(name, p)) 662 continue; 663 if (*size > n++) { 664 if (!p->pfik_tzero) 665 p->pfik_tzero = time_second; 666 pfi_kif_ref(p, PFI_KIF_REF_RULE); 667 if (copyout(p, buf++, sizeof(*buf))) { 668 pfi_kif_unref(p, PFI_KIF_REF_RULE); 669 splx(s); 670 return (EFAULT); 671 } 672 nextp = RB_NEXT(pfi_ifhead, &pfi_ifs, p); 673 pfi_kif_unref(p, PFI_KIF_REF_RULE); 674 } 675 } 676 splx(s); 677 *size = n; 678 return (0); 679 } 680 681 int 682 pfi_skip_if(const char *filter, struct pfi_kif *p) 683 { 684 int n; 685 686 if (filter == NULL || !*filter) 687 return (0); 688 if (!strcmp(p->pfik_name, filter)) 689 return (0); /* exact match */ 690 n = strlen(filter); 691 if (n < 1 || n >= IFNAMSIZ) 692 return (1); /* sanity check */ 693 if (filter[n-1] >= '0' && filter[n-1] <= '9') 694 return (1); /* only do exact match in that case */ 695 if (strncmp(p->pfik_name, filter, n)) 696 return (1); /* prefix doesn't match */ 697 return (p->pfik_name[n] < '0' || p->pfik_name[n] > '9'); 698 } 699 700 int 701 pfi_set_flags(const char *name, int flags) 702 { 703 struct pfi_kif *p; 704 int s; 705 706 s = splsoftnet(); 707 RB_FOREACH(p, pfi_ifhead, &pfi_ifs) { 708 if (pfi_skip_if(name, p)) 709 continue; 710 p->pfik_flags |= flags; 711 } 712 splx(s); 713 return (0); 714 } 715 716 int 717 pfi_clear_flags(const char *name, int flags) 718 { 719 struct pfi_kif *p; 720 int s; 721 722 s = splsoftnet(); 723 RB_FOREACH(p, pfi_ifhead, &pfi_ifs) { 724 if (pfi_skip_if(name, p)) 725 continue; 726 p->pfik_flags &= ~flags; 727 } 728 splx(s); 729 return (0); 730 } 731 732 /* from pf_print_state.c */ 733 int 734 pfi_unmask(void *addr) 735 { 736 struct pf_addr *m = addr; 737 int i = 31, j = 0, b = 0; 738 u_int32_t tmp; 739 740 while (j < 4 && m->addr32[j] == 0xffffffff) { 741 b += 32; 742 j++; 743 } 744 if (j < 4) { 745 tmp = ntohl(m->addr32[j]); 746 for (i = 31; tmp & (1 << i); --i) 747 b++; 748 } 749 return (b); 750 } 751 752
Indexes created Sun Oct 12 09:09:55 GMT 2025