pf_if.c revision 1.15.8.1
1 /* $NetBSD: pf_if.c,v 1.15.8.1 2008/04/19 08:33:27 yamt 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/cdefs.h> 37 __KERNEL_RCSID(0, "$NetBSD: pf_if.c,v 1.15.8.1 2008/04/19 08:33:27 yamt Exp $"); 38 39 #ifdef _KERNEL_OPT 40 #include "opt_inet.h" 41 #include "opt_pfil_hooks.h" 42 #endif 43 44 #include <sys/param.h> 45 #include <sys/systm.h> 46 #include <sys/mbuf.h> 47 #include <sys/filio.h> 48 #include <sys/socket.h> 49 #include <sys/socketvar.h> 50 #include <sys/kernel.h> 51 #include <sys/device.h> 52 #include <sys/time.h> 53 54 #include <net/if.h> 55 #include <net/if_types.h> 56 57 #include <netinet/in.h> 58 #include <netinet/in_var.h> 59 #include <netinet/in_systm.h> 60 #include <netinet/ip.h> 61 #include <netinet/ip_var.h> 62 63 #include <net/pfvar.h> 64 65 #ifdef INET6 66 #include <netinet/ip6.h> 67 #endif /* INET6 */ 68 69 struct pfi_kif *pfi_all = NULL; 70 struct pool pfi_addr_pl; 71 struct pfi_ifhead pfi_ifs; 72 long pfi_update = 1; 73 struct pfr_addr *pfi_buffer; 74 int pfi_buffer_cnt; 75 int pfi_buffer_max; 76 77 void pfi_kif_update(struct pfi_kif *); 78 void pfi_dynaddr_update(struct pfi_dynaddr *dyn); 79 void pfi_table_update(struct pfr_ktable *, struct pfi_kif *, 80 int, int); 81 void pfi_kifaddr_update(void *); 82 void pfi_instance_add(struct ifnet *, int, int); 83 void pfi_address_add(struct sockaddr *, int, int); 84 int pfi_if_compare(struct pfi_kif *, struct pfi_kif *); 85 int pfi_skip_if(const char *, struct pfi_kif *); 86 int pfi_unmask(void *); 87 #ifdef __NetBSD__ 88 int pfil_ifnet_wrapper(void *, struct mbuf **, struct ifnet *, int); 89 int pfil_ifaddr_wrapper(void *, struct mbuf **, struct ifnet *, int); 90 #endif 91 92 RB_PROTOTYPE(pfi_ifhead, pfi_kif, pfik_tree, pfi_if_compare); 93 RB_GENERATE(pfi_ifhead, pfi_kif, pfik_tree, pfi_if_compare); 94 95 #define PFI_BUFFER_MAX 0x10000 96 #define PFI_MTYPE M_IFADDR 97 98 void 99 pfi_initialize(void) 100 { 101 #ifdef __NetBSD__ 102 int i; 103 #endif /* __NetBSD__ */ 104 105 if (pfi_all != NULL) /* already initialized */ 106 return; 107 108 #ifdef __NetBSD__ 109 pool_init(&pfi_addr_pl, sizeof(struct pfi_dynaddr), 0, 0, 0, 110 "pfiaddrpl", &pool_allocator_nointr, IPL_NONE); 111 #else 112 pool_init(&pfi_addr_pl, sizeof(struct pfi_dynaddr), 0, 0, 0, 113 "pfiaddrpl", &pool_allocator_nointr); 114 #endif /* !__NetBSD__ */ 115 pfi_buffer_max = 64; 116 pfi_buffer = malloc(pfi_buffer_max * sizeof(*pfi_buffer), 117 PFI_MTYPE, M_WAITOK); 118 119 if ((pfi_all = pfi_kif_get(IFG_ALL)) == NULL) 120 panic("pfi_kif_get for pfi_all failed"); 121 122 #ifdef __NetBSD__ 123 for (i = 0; i < if_indexlim; i++) { 124 struct ifnet *ifp = ifindex2ifnet[i]; 125 126 if (ifp != NULL) { 127 if_init_groups(ifp); 128 if_addgroup(ifp, IFG_ALL); 129 130 pfi_attach_ifnet(ifp); 131 } 132 } 133 134 pfil_add_hook(pfil_ifnet_wrapper, NULL, PFIL_IFNET, &if_pfil); 135 pfil_add_hook(pfil_ifaddr_wrapper, NULL, PFIL_IFADDR, &if_pfil); 136 #endif /* __NetBSD__ */ 137 } 138 139 #ifdef _LKM 140 void 141 pfi_destroy(void) 142 { 143 144 pfil_remove_hook(pfil_ifaddr_wrapper, NULL, PFIL_IFADDR, &if_pfil); 145 pfil_remove_hook(pfil_ifnet_wrapper, NULL, PFIL_IFNET, &if_pfil); 146 147 for (i = 0; i < if_indexlim; i++) { 148 struct ifnet *ifp = ifindex2ifnet[i]; 149 150 if (ifp != NULL) { 151 pfi_detach_ifnet(ifindex2ifnet[i]); 152 153 if_delgroup(ifp, IFG_ALL); 154 if_destroy_groups(ifp); 155 } 156 } 157 158 pool_destroy(&pfi_addr_pl); 159 160 free(pfi_buffer, PFI_MTYPE); 161 } 162 #endif /* _LKM */ 163 164 struct pfi_kif * 165 pfi_kif_get(const char *kif_name) 166 { 167 struct pfi_kif *kif; 168 struct pfi_kif_cmp s; 169 170 bzero(&s, sizeof(s)); 171 strlcpy(s.pfik_name, kif_name, sizeof(s.pfik_name)); 172 if ((kif = RB_FIND(pfi_ifhead, &pfi_ifs, (struct pfi_kif *)&s)) != NULL) 173 return (kif); 174 175 /* create new one */ 176 if ((kif = malloc(sizeof(*kif), PFI_MTYPE, M_DONTWAIT)) == NULL) 177 return (NULL); 178 179 bzero(kif, sizeof(*kif)); 180 strlcpy(kif->pfik_name, kif_name, sizeof(kif->pfik_name)); 181 #ifdef __NetBSD__ 182 /* time_second is not valid yet */ 183 kif->pfik_tzero = (time_second > 7200) ? time_second : 0; 184 #else 185 kif->pfik_tzero = time_second; 186 #endif /* !__NetBSD__ */ 187 TAILQ_INIT(&kif->pfik_dynaddrs); 188 189 RB_INSERT(pfi_ifhead, &pfi_ifs, kif); 190 return (kif); 191 } 192 193 void 194 pfi_kif_ref(struct pfi_kif *kif, enum pfi_kif_refs what) 195 { 196 switch (what) { 197 case PFI_KIF_REF_RULE: 198 kif->pfik_rules++; 199 break; 200 case PFI_KIF_REF_STATE: 201 kif->pfik_states++; 202 break; 203 default: 204 panic("pfi_kif_ref with unknown type"); 205 } 206 } 207 208 void 209 pfi_kif_unref(struct pfi_kif *kif, enum pfi_kif_refs what) 210 { 211 if (kif == NULL) 212 return; 213 214 switch (what) { 215 case PFI_KIF_REF_NONE: 216 break; 217 case PFI_KIF_REF_RULE: 218 if (kif->pfik_rules <= 0) { 219 printf("pfi_kif_unref: rules refcount <= 0\n"); 220 return; 221 } 222 kif->pfik_rules--; 223 break; 224 case PFI_KIF_REF_STATE: 225 if (kif->pfik_states <= 0) { 226 printf("pfi_kif_unref: state refcount <= 0\n"); 227 return; 228 } 229 kif->pfik_states--; 230 break; 231 default: 232 panic("pfi_kif_unref with unknown type"); 233 } 234 235 if (kif->pfik_ifp != NULL || kif->pfik_group != NULL || kif == pfi_all) 236 return; 237 238 if (kif->pfik_rules || kif->pfik_states) 239 return; 240 241 RB_REMOVE(pfi_ifhead, &pfi_ifs, kif); 242 free(kif, PFI_MTYPE); 243 } 244 245 int 246 pfi_kif_match(struct pfi_kif *rule_kif, struct pfi_kif *packet_kif) 247 { 248 struct ifg_list *p; 249 250 if (rule_kif == NULL || rule_kif == packet_kif) 251 return (1); 252 253 if (rule_kif->pfik_group != NULL) { 254 struct ifg_list_head *ifgh = 255 if_get_groups(packet_kif->pfik_ifp); 256 257 TAILQ_FOREACH(p, ifgh, ifgl_next) 258 if (p->ifgl_group == rule_kif->pfik_group) 259 return (1); 260 } 261 262 return (0); 263 } 264 265 void 266 pfi_attach_ifnet(struct ifnet *ifp) 267 { 268 struct pfi_kif *kif; 269 int s; 270 271 pfi_initialize(); 272 s = splsoftnet(); 273 pfi_update++; 274 if ((kif = pfi_kif_get(ifp->if_xname)) == NULL) 275 panic("pfi_kif_get failed"); 276 277 kif->pfik_ifp = ifp; 278 ifp->if_pf_kif = kif; 279 280 #ifndef __NetBSD__ 281 if ((kif->pfik_ah_cookie = hook_establish(ifp->if_addrhooks, 1, 282 pfi_kifaddr_update, kif)) == NULL) 283 panic("pfi_attach_ifnet: cannot allocate '%s' address hook", 284 ifp->if_xname); 285 #endif /* !__NetBSD__ */ 286 287 pfi_kif_update(kif); 288 289 splx(s); 290 } 291 292 void 293 pfi_detach_ifnet(struct ifnet *ifp) 294 { 295 int s; 296 struct pfi_kif *kif; 297 298 if ((kif = (struct pfi_kif *)ifp->if_pf_kif) == NULL) 299 return; 300 301 s = splsoftnet(); 302 pfi_update++; 303 #ifndef __NetBSD__ 304 hook_disestablish(ifp->if_addrhooks, kif->pfik_ah_cookie); 305 #endif /* !__NetBSD__ */ 306 pfi_kif_update(kif); 307 308 kif->pfik_ifp = NULL; 309 ifp->if_pf_kif = NULL; 310 pfi_kif_unref(kif, PFI_KIF_REF_NONE); 311 splx(s); 312 } 313 314 void 315 pfi_attach_ifgroup(struct ifg_group *ifg) 316 { 317 struct pfi_kif *kif; 318 int s; 319 320 pfi_initialize(); 321 s = splsoftnet(); 322 pfi_update++; 323 if ((kif = pfi_kif_get(ifg->ifg_group)) == NULL) 324 panic("pfi_kif_get failed"); 325 326 kif->pfik_group = ifg; 327 ifg->ifg_pf_kif = kif; 328 329 splx(s); 330 } 331 332 void 333 pfi_detach_ifgroup(struct ifg_group *ifg) 334 { 335 int s; 336 struct pfi_kif *kif; 337 338 if ((kif = (struct pfi_kif *)ifg->ifg_pf_kif) == NULL) 339 return; 340 341 s = splsoftnet(); 342 pfi_update++; 343 344 kif->pfik_group = NULL; 345 ifg->ifg_pf_kif = NULL; 346 pfi_kif_unref(kif, PFI_KIF_REF_NONE); 347 splx(s); 348 } 349 350 void 351 pfi_group_change(const char *group) 352 { 353 struct pfi_kif *kif; 354 int s; 355 356 s = splsoftnet(); 357 pfi_update++; 358 if ((kif = pfi_kif_get(group)) == NULL) 359 panic("pfi_kif_get failed"); 360 361 pfi_kif_update(kif); 362 363 splx(s); 364 } 365 366 int 367 pfi_match_addr(struct pfi_dynaddr *dyn, struct pf_addr *a, sa_family_t af) 368 { 369 switch (af) { 370 #ifdef INET 371 case AF_INET: 372 switch (dyn->pfid_acnt4) { 373 case 0: 374 return (0); 375 case 1: 376 return (PF_MATCHA(0, &dyn->pfid_addr4, 377 &dyn->pfid_mask4, a, AF_INET)); 378 default: 379 return (pfr_match_addr(dyn->pfid_kt, a, AF_INET)); 380 } 381 break; 382 #endif /* INET */ 383 #ifdef INET6 384 case AF_INET6: 385 switch (dyn->pfid_acnt6) { 386 case 0: 387 return (0); 388 case 1: 389 return (PF_MATCHA(0, &dyn->pfid_addr6, 390 &dyn->pfid_mask6, a, AF_INET6)); 391 default: 392 return (pfr_match_addr(dyn->pfid_kt, a, AF_INET6)); 393 } 394 break; 395 #endif /* INET6 */ 396 default: 397 return (0); 398 } 399 } 400 401 int 402 pfi_dynaddr_setup(struct pf_addr_wrap *aw, sa_family_t af) 403 { 404 struct pfi_dynaddr *dyn; 405 char tblname[PF_TABLE_NAME_SIZE]; 406 struct pf_ruleset *ruleset = NULL; 407 int s, rv = 0; 408 409 if (aw->type != PF_ADDR_DYNIFTL) 410 return (0); 411 if ((dyn = pool_get(&pfi_addr_pl, PR_NOWAIT)) == NULL) 412 return (1); 413 bzero(dyn, sizeof(*dyn)); 414 415 s = splsoftnet(); 416 if (!strcmp(aw->v.ifname, "self")) 417 dyn->pfid_kif = pfi_kif_get(IFG_ALL); 418 else 419 dyn->pfid_kif = pfi_kif_get(aw->v.ifname); 420 if (dyn->pfid_kif == NULL) { 421 rv = 1; 422 goto _bad; 423 } 424 pfi_kif_ref(dyn->pfid_kif, PFI_KIF_REF_RULE); 425 426 dyn->pfid_net = pfi_unmask(&aw->v.a.mask); 427 if (af == AF_INET && dyn->pfid_net == 32) 428 dyn->pfid_net = 128; 429 strlcpy(tblname, aw->v.ifname, sizeof(tblname)); 430 if (aw->iflags & PFI_AFLAG_NETWORK) 431 strlcat(tblname, ":network", sizeof(tblname)); 432 if (aw->iflags & PFI_AFLAG_BROADCAST) 433 strlcat(tblname, ":broadcast", sizeof(tblname)); 434 if (aw->iflags & PFI_AFLAG_PEER) 435 strlcat(tblname, ":peer", sizeof(tblname)); 436 if (aw->iflags & PFI_AFLAG_NOALIAS) 437 strlcat(tblname, ":0", sizeof(tblname)); 438 if (dyn->pfid_net != 128) 439 snprintf(tblname + strlen(tblname), 440 sizeof(tblname) - strlen(tblname), "/%d", dyn->pfid_net); 441 if ((ruleset = pf_find_or_create_ruleset(PF_RESERVED_ANCHOR)) == NULL) { 442 rv = 1; 443 goto _bad; 444 } 445 446 if ((dyn->pfid_kt = pfr_attach_table(ruleset, tblname)) == NULL) { 447 rv = 1; 448 goto _bad; 449 } 450 451 dyn->pfid_kt->pfrkt_flags |= PFR_TFLAG_ACTIVE; 452 dyn->pfid_iflags = aw->iflags; 453 dyn->pfid_af = af; 454 455 TAILQ_INSERT_TAIL(&dyn->pfid_kif->pfik_dynaddrs, dyn, entry); 456 aw->p.dyn = dyn; 457 pfi_kif_update(dyn->pfid_kif); 458 splx(s); 459 return (0); 460 461 _bad: 462 if (dyn->pfid_kt != NULL) 463 pfr_detach_table(dyn->pfid_kt); 464 if (ruleset != NULL) 465 pf_remove_if_empty_ruleset(ruleset); 466 if (dyn->pfid_kif != NULL) 467 pfi_kif_unref(dyn->pfid_kif, PFI_KIF_REF_RULE); 468 pool_put(&pfi_addr_pl, dyn); 469 splx(s); 470 return (rv); 471 } 472 473 void 474 pfi_kif_update(struct pfi_kif *kif) 475 { 476 struct ifg_list *ifgl; 477 struct pfi_dynaddr *p; 478 479 /* update all dynaddr */ 480 TAILQ_FOREACH(p, &kif->pfik_dynaddrs, entry) 481 pfi_dynaddr_update(p); 482 483 /* again for all groups kif is member of */ 484 if (kif->pfik_ifp != NULL) { 485 struct ifg_list_head *ifgh = if_get_groups(kif->pfik_ifp); 486 487 TAILQ_FOREACH(ifgl, ifgh, ifgl_next) 488 pfi_kif_update((struct pfi_kif *) 489 ifgl->ifgl_group->ifg_pf_kif); 490 } 491 } 492 493 void 494 pfi_dynaddr_update(struct pfi_dynaddr *dyn) 495 { 496 struct pfi_kif *kif; 497 struct pfr_ktable *kt; 498 499 if (dyn == NULL || dyn->pfid_kif == NULL || dyn->pfid_kt == NULL) 500 panic("pfi_dynaddr_update"); 501 502 kif = dyn->pfid_kif; 503 kt = dyn->pfid_kt; 504 505 if (kt->pfrkt_larg != pfi_update) { 506 /* this table needs to be brought up-to-date */ 507 pfi_table_update(kt, kif, dyn->pfid_net, dyn->pfid_iflags); 508 kt->pfrkt_larg = pfi_update; 509 } 510 pfr_dynaddr_update(kt, dyn); 511 } 512 513 void 514 pfi_table_update(struct pfr_ktable *kt, struct pfi_kif *kif, int net, int flags) 515 { 516 int e, size2 = 0; 517 struct ifg_member *ifgm; 518 519 pfi_buffer_cnt = 0; 520 521 if (kif->pfik_ifp != NULL) 522 pfi_instance_add(kif->pfik_ifp, net, flags); 523 else if (kif->pfik_group != NULL) 524 TAILQ_FOREACH(ifgm, &kif->pfik_group->ifg_members, ifgm_next) 525 pfi_instance_add(ifgm->ifgm_ifp, net, flags); 526 527 if ((e = pfr_set_addrs(&kt->pfrkt_t, pfi_buffer, pfi_buffer_cnt, &size2, 528 NULL, NULL, NULL, 0, PFR_TFLAG_ALLMASK))) 529 printf("pfi_table_update: cannot set %d new addresses " 530 "into table %s: %d\n", pfi_buffer_cnt, kt->pfrkt_name, e); 531 } 532 533 void 534 pfi_instance_add(struct ifnet *ifp, int net, int flags) 535 { 536 struct ifaddr *ia; 537 int got4 = 0, got6 = 0; 538 int net2, af; 539 540 if (ifp == NULL) 541 return; 542 IFADDR_FOREACH(ia, ifp) { 543 if (ia->ifa_addr == NULL) 544 continue; 545 af = ia->ifa_addr->sa_family; 546 if (af != AF_INET && af != AF_INET6) 547 continue; 548 if ((flags & PFI_AFLAG_BROADCAST) && af == AF_INET6) 549 continue; 550 if ((flags & PFI_AFLAG_BROADCAST) && 551 !(ifp->if_flags & IFF_BROADCAST)) 552 continue; 553 if ((flags & PFI_AFLAG_PEER) && 554 !(ifp->if_flags & IFF_POINTOPOINT)) 555 continue; 556 if ((flags & PFI_AFLAG_NETWORK) && af == AF_INET6 && 557 IN6_IS_ADDR_LINKLOCAL( 558 &((struct sockaddr_in6 *)ia->ifa_addr)->sin6_addr)) 559 continue; 560 if (flags & PFI_AFLAG_NOALIAS) { 561 if (af == AF_INET && got4) 562 continue; 563 if (af == AF_INET6 && got6) 564 continue; 565 } 566 if (af == AF_INET) 567 got4 = 1; 568 else if (af == AF_INET6) 569 got6 = 1; 570 net2 = net; 571 if (net2 == 128 && (flags & PFI_AFLAG_NETWORK)) { 572 if (af == AF_INET) 573 net2 = pfi_unmask(&((struct sockaddr_in *) 574 ia->ifa_netmask)->sin_addr); 575 else if (af == AF_INET6) 576 net2 = pfi_unmask(&((struct sockaddr_in6 *) 577 ia->ifa_netmask)->sin6_addr); 578 } 579 if (af == AF_INET && net2 > 32) 580 net2 = 32; 581 if (flags & PFI_AFLAG_BROADCAST) 582 pfi_address_add(ia->ifa_broadaddr, af, net2); 583 else if (flags & PFI_AFLAG_PEER) 584 pfi_address_add(ia->ifa_dstaddr, af, net2); 585 else 586 pfi_address_add(ia->ifa_addr, af, net2); 587 } 588 } 589 590 void 591 pfi_address_add(struct sockaddr *sa, int af, int net) 592 { 593 struct pfr_addr *p; 594 int i; 595 596 if (pfi_buffer_cnt >= pfi_buffer_max) { 597 int new_max = pfi_buffer_max * 2; 598 599 if (new_max > PFI_BUFFER_MAX) { 600 printf("pfi_address_add: address buffer full (%d/%d)\n", 601 pfi_buffer_cnt, PFI_BUFFER_MAX); 602 return; 603 } 604 p = malloc(new_max * sizeof(*pfi_buffer), PFI_MTYPE, 605 M_DONTWAIT); 606 if (p == NULL) { 607 printf("pfi_address_add: no memory to grow buffer " 608 "(%d/%d)\n", pfi_buffer_cnt, PFI_BUFFER_MAX); 609 return; 610 } 611 memcpy(pfi_buffer, p, pfi_buffer_cnt * sizeof(*pfi_buffer)); 612 /* no need to zero buffer */ 613 free(pfi_buffer, PFI_MTYPE); 614 pfi_buffer = p; 615 pfi_buffer_max = new_max; 616 } 617 if (af == AF_INET && net > 32) 618 net = 128; 619 p = pfi_buffer + pfi_buffer_cnt++; 620 bzero(p, sizeof(*p)); 621 p->pfra_af = af; 622 p->pfra_net = net; 623 if (af == AF_INET) 624 p->pfra_ip4addr = ((struct sockaddr_in *)sa)->sin_addr; 625 else if (af == AF_INET6) { 626 p->pfra_ip6addr = ((struct sockaddr_in6 *)sa)->sin6_addr; 627 if (IN6_IS_SCOPE_EMBEDDABLE(&p->pfra_ip6addr)) 628 p->pfra_ip6addr.s6_addr16[1] = 0; 629 } 630 /* mask network address bits */ 631 if (net < 128) 632 ((char *)p)[p->pfra_net/8] &= ~(0xFF >> (p->pfra_net%8)); 633 for (i = (p->pfra_net+7)/8; i < sizeof(p->pfra_u); i++) 634 ((char *)p)[i] = 0; 635 } 636 637 void 638 pfi_dynaddr_remove(struct pf_addr_wrap *aw) 639 { 640 int s; 641 642 if (aw->type != PF_ADDR_DYNIFTL || aw->p.dyn == NULL || 643 aw->p.dyn->pfid_kif == NULL || aw->p.dyn->pfid_kt == NULL) 644 return; 645 646 s = splsoftnet(); 647 TAILQ_REMOVE(&aw->p.dyn->pfid_kif->pfik_dynaddrs, aw->p.dyn, entry); 648 pfi_kif_unref(aw->p.dyn->pfid_kif, PFI_KIF_REF_RULE); 649 aw->p.dyn->pfid_kif = NULL; 650 pfr_detach_table(aw->p.dyn->pfid_kt); 651 aw->p.dyn->pfid_kt = NULL; 652 pool_put(&pfi_addr_pl, aw->p.dyn); 653 aw->p.dyn = NULL; 654 splx(s); 655 } 656 657 void 658 pfi_dynaddr_copyout(struct pf_addr_wrap *aw) 659 { 660 if (aw->type != PF_ADDR_DYNIFTL || aw->p.dyn == NULL || 661 aw->p.dyn->pfid_kif == NULL) 662 return; 663 aw->p.dyncnt = aw->p.dyn->pfid_acnt4 + aw->p.dyn->pfid_acnt6; 664 } 665 666 void 667 pfi_kifaddr_update(void *v) 668 { 669 int s; 670 struct pfi_kif *kif = (struct pfi_kif *)v; 671 672 s = splsoftnet(); 673 pfi_update++; 674 pfi_kif_update(kif); 675 splx(s); 676 } 677 678 int 679 pfi_if_compare(struct pfi_kif *p, struct pfi_kif *q) 680 { 681 return (strncmp(p->pfik_name, q->pfik_name, IFNAMSIZ)); 682 } 683 684 void 685 pfi_fill_oldstatus(struct pf_status *pfs) 686 { 687 struct pfi_kif *p; 688 struct pfi_kif_cmp key; 689 int i, j, k, s; 690 691 strlcpy(key.pfik_name, pfs->ifname, sizeof(key.pfik_name)); 692 s = splsoftnet(); 693 p = RB_FIND(pfi_ifhead, &pfi_ifs, (struct pfi_kif *)&key); 694 if (p == NULL) { 695 splx(s); 696 return; 697 } 698 bzero(pfs->pcounters, sizeof(pfs->pcounters)); 699 bzero(pfs->bcounters, sizeof(pfs->bcounters)); 700 for (i = 0; i < 2; i++) 701 for (j = 0; j < 2; j++) 702 for (k = 0; k < 2; k++) { 703 pfs->pcounters[i][j][k] = 704 p->pfik_packets[i][j][k]; 705 pfs->bcounters[i][j] += 706 p->pfik_bytes[i][j][k]; 707 } 708 splx(s); 709 } 710 711 int 712 pfi_clr_istats(const char *name) 713 { 714 struct pfi_kif *p; 715 int s; 716 717 s = splsoftnet(); 718 RB_FOREACH(p, pfi_ifhead, &pfi_ifs) { 719 if (pfi_skip_if(name, p)) 720 continue; 721 bzero(p->pfik_packets, sizeof(p->pfik_packets)); 722 bzero(p->pfik_bytes, sizeof(p->pfik_bytes)); 723 p->pfik_tzero = time_second; 724 } 725 splx(s); 726 727 return (0); 728 } 729 730 int 731 pfi_get_ifaces(const char *name, struct pfi_kif *buf, int *size) 732 { 733 struct pfi_kif *p, *nextp; 734 int s, n = 0; 735 736 s = splsoftnet(); 737 for (p = RB_MIN(pfi_ifhead, &pfi_ifs); p; p = nextp) { 738 nextp = RB_NEXT(pfi_ifhead, &pfi_ifs, p); 739 if (pfi_skip_if(name, p)) 740 continue; 741 if (*size > n++) { 742 if (!p->pfik_tzero) 743 p->pfik_tzero = time_second; 744 pfi_kif_ref(p, PFI_KIF_REF_RULE); 745 if (copyout(p, buf++, sizeof(*buf))) { 746 pfi_kif_unref(p, PFI_KIF_REF_RULE); 747 splx(s); 748 return (EFAULT); 749 } 750 nextp = RB_NEXT(pfi_ifhead, &pfi_ifs, p); 751 pfi_kif_unref(p, PFI_KIF_REF_RULE); 752 } 753 } 754 splx(s); 755 *size = n; 756 return (0); 757 } 758 759 int 760 pfi_skip_if(const char *filter, struct pfi_kif *p) 761 { 762 int n; 763 764 if (filter == NULL || !*filter) 765 return (0); 766 if (!strcmp(p->pfik_name, filter)) 767 return (0); /* exact match */ 768 n = strlen(filter); 769 if (n < 1 || n >= IFNAMSIZ) 770 return (1); /* sanity check */ 771 if (filter[n-1] >= '0' && filter[n-1] <= '9') 772 return (1); /* only do exact match in that case */ 773 if (strncmp(p->pfik_name, filter, n)) 774 return (1); /* prefix doesn't match */ 775 return (p->pfik_name[n] < '0' || p->pfik_name[n] > '9'); 776 } 777 778 int 779 pfi_set_flags(const char *name, int flags) 780 { 781 struct pfi_kif *p; 782 int s; 783 784 s = splsoftnet(); 785 RB_FOREACH(p, pfi_ifhead, &pfi_ifs) { 786 if (pfi_skip_if(name, p)) 787 continue; 788 p->pfik_flags |= flags; 789 } 790 splx(s); 791 return (0); 792 } 793 794 int 795 pfi_clear_flags(const char *name, int flags) 796 { 797 struct pfi_kif *p; 798 int s; 799 800 s = splsoftnet(); 801 RB_FOREACH(p, pfi_ifhead, &pfi_ifs) { 802 if (pfi_skip_if(name, p)) 803 continue; 804 p->pfik_flags &= ~flags; 805 } 806 splx(s); 807 return (0); 808 } 809 810 /* from pf_print_state.c */ 811 int 812 pfi_unmask(void *addr) 813 { 814 struct pf_addr *m = addr; 815 int i = 31, j = 0, b = 0; 816 u_int32_t tmp; 817 818 while (j < 4 && m->addr32[j] == 0xffffffff) { 819 b += 32; 820 j++; 821 } 822 if (j < 4) { 823 tmp = ntohl(m->addr32[j]); 824 for (i = 31; tmp & (1 << i); --i) 825 b++; 826 } 827 return (b); 828 } 829 830 #ifdef __NetBSD__ 831 int 832 pfil_ifnet_wrapper(void *arg, struct mbuf **mp, struct ifnet *ifp, int dir) 833 { 834 u_long cmd = (u_long)mp; 835 836 switch (cmd) { 837 case PFIL_IFNET_ATTACH: 838 if_init_groups(ifp); 839 if_addgroup(ifp, IFG_ALL); 840 /* XXXPF if_addgroup(ifp, ifp->if_xname); */ 841 842 pfi_attach_ifnet(ifp); 843 break; 844 case PFIL_IFNET_DETACH: 845 pfi_detach_ifnet(ifp); 846 847 if_delgroup(ifp, IFG_ALL); 848 if_destroy_groups(ifp); 849 break; 850 default: 851 panic("pfil_ifnet_wrapper: unexpected cmd %lu", cmd); 852 } 853 854 return (0); 855 } 856 857 int 858 pfil_ifaddr_wrapper(void *arg, struct mbuf **mp, struct ifnet *ifp, int dir) 859 { 860 u_long cmd = (u_long)mp; 861 862 switch (cmd) { 863 case SIOCSIFADDR: 864 case SIOCAIFADDR: 865 case SIOCDIFADDR: 866 #ifdef INET6 867 case SIOCAIFADDR_IN6: 868 case SIOCDIFADDR_IN6: 869 #endif /* INET6 */ 870 pfi_kifaddr_update(ifp->if_pf_kif); 871 break; 872 default: 873 panic("pfil_ifaddr_wrapper: unexpected ioctl %lu", cmd); 874 } 875 876 return (0); 877 } 878 #endif /* __NetBSD__ */ 879
Indexes created Sun Oct 12 09:09:55 GMT 2025