pf_if.c revision 1.15.8.3
1 /* $NetBSD: pf_if.c,v 1.15.8.3 2008/04/21 20:26:51 peter 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 1.15.8.3 2008/04/21 20:26:51 peter 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 void pfi_init_groups(struct ifnet *); 89 void pfi_destroy_groups(struct ifnet *); 90 91 int pfil_ifnet_wrapper(void *, struct mbuf **, struct ifnet *, int); 92 int pfil_ifaddr_wrapper(void *, struct mbuf **, struct ifnet *, int); 93 #endif 94 95 RB_PROTOTYPE(pfi_ifhead, pfi_kif, pfik_tree, pfi_if_compare); 96 RB_GENERATE(pfi_ifhead, pfi_kif, pfik_tree, pfi_if_compare); 97 98 #define PFI_BUFFER_MAX 0x10000 99 #define PFI_MTYPE M_IFADDR 100 101 void 102 pfi_initialize(void) 103 { 104 #ifdef __NetBSD__ 105 int i; 106 #endif /* __NetBSD__ */ 107 108 if (pfi_all != NULL) /* already initialized */ 109 return; 110 111 #ifdef __NetBSD__ 112 pool_init(&pfi_addr_pl, sizeof(struct pfi_dynaddr), 0, 0, 0, 113 "pfiaddrpl", &pool_allocator_nointr, IPL_NONE); 114 #else 115 pool_init(&pfi_addr_pl, sizeof(struct pfi_dynaddr), 0, 0, 0, 116 "pfiaddrpl", &pool_allocator_nointr); 117 #endif /* !__NetBSD__ */ 118 pfi_buffer_max = 64; 119 pfi_buffer = malloc(pfi_buffer_max * sizeof(*pfi_buffer), 120 PFI_MTYPE, M_WAITOK); 121 122 if ((pfi_all = pfi_kif_get(IFG_ALL)) == NULL) 123 panic("pfi_kif_get for pfi_all failed"); 124 125 #ifdef __NetBSD__ 126 for (i = 0; i < if_indexlim; i++) { 127 struct ifnet *ifp = ifindex2ifnet[i]; 128 129 if (ifp != NULL) { 130 pfi_init_groups(ifp); 131 132 pfi_attach_ifnet(ifp); 133 } 134 } 135 136 pfil_add_hook(pfil_ifnet_wrapper, NULL, PFIL_IFNET, &if_pfil); 137 pfil_add_hook(pfil_ifaddr_wrapper, NULL, PFIL_IFADDR, &if_pfil); 138 #endif /* __NetBSD__ */ 139 } 140 141 #ifdef _LKM 142 void 143 pfi_destroy(void) 144 { 145 int i; 146 147 pfil_remove_hook(pfil_ifaddr_wrapper, NULL, PFIL_IFADDR, &if_pfil); 148 pfil_remove_hook(pfil_ifnet_wrapper, NULL, PFIL_IFNET, &if_pfil); 149 150 for (i = 0; i < if_indexlim; i++) { 151 struct ifnet *ifp = ifindex2ifnet[i]; 152 153 if (ifp != NULL) { 154 pfi_detach_ifnet(ifp); 155 156 pfi_destroy_groups(ifp); 157 } 158 } 159 160 pool_destroy(&pfi_addr_pl); 161 162 free(pfi_buffer, PFI_MTYPE); 163 } 164 #endif /* _LKM */ 165 166 struct pfi_kif * 167 pfi_kif_get(const char *kif_name) 168 { 169 struct pfi_kif *kif; 170 struct pfi_kif_cmp s; 171 172 bzero(&s, sizeof(s)); 173 strlcpy(s.pfik_name, kif_name, sizeof(s.pfik_name)); 174 if ((kif = RB_FIND(pfi_ifhead, &pfi_ifs, (struct pfi_kif *)&s)) != NULL) 175 return (kif); 176 177 /* create new one */ 178 if ((kif = malloc(sizeof(*kif), PFI_MTYPE, M_DONTWAIT)) == NULL) 179 return (NULL); 180 181 bzero(kif, sizeof(*kif)); 182 strlcpy(kif->pfik_name, kif_name, sizeof(kif->pfik_name)); 183 #ifdef __NetBSD__ 184 /* time_second is not valid yet */ 185 kif->pfik_tzero = (time_second > 7200) ? time_second : 0; 186 #else 187 kif->pfik_tzero = time_second; 188 #endif /* !__NetBSD__ */ 189 TAILQ_INIT(&kif->pfik_dynaddrs); 190 191 RB_INSERT(pfi_ifhead, &pfi_ifs, kif); 192 return (kif); 193 } 194 195 void 196 pfi_kif_ref(struct pfi_kif *kif, enum pfi_kif_refs what) 197 { 198 switch (what) { 199 case PFI_KIF_REF_RULE: 200 kif->pfik_rules++; 201 break; 202 case PFI_KIF_REF_STATE: 203 kif->pfik_states++; 204 break; 205 default: 206 panic("pfi_kif_ref with unknown type"); 207 } 208 } 209 210 void 211 pfi_kif_unref(struct pfi_kif *kif, enum pfi_kif_refs what) 212 { 213 if (kif == NULL) 214 return; 215 216 switch (what) { 217 case PFI_KIF_REF_NONE: 218 break; 219 case PFI_KIF_REF_RULE: 220 if (kif->pfik_rules <= 0) { 221 printf("pfi_kif_unref: rules refcount <= 0\n"); 222 return; 223 } 224 kif->pfik_rules--; 225 break; 226 case PFI_KIF_REF_STATE: 227 if (kif->pfik_states <= 0) { 228 printf("pfi_kif_unref: state refcount <= 0\n"); 229 return; 230 } 231 kif->pfik_states--; 232 break; 233 default: 234 panic("pfi_kif_unref with unknown type"); 235 } 236 237 if (kif->pfik_ifp != NULL || kif->pfik_group != NULL || kif == pfi_all) 238 return; 239 240 if (kif->pfik_rules || kif->pfik_states) 241 return; 242 243 RB_REMOVE(pfi_ifhead, &pfi_ifs, kif); 244 free(kif, PFI_MTYPE); 245 } 246 247 int 248 pfi_kif_match(struct pfi_kif *rule_kif, struct pfi_kif *packet_kif) 249 { 250 struct ifg_list *p; 251 252 if (rule_kif == NULL || rule_kif == packet_kif) 253 return (1); 254 255 if (rule_kif->pfik_group != NULL) { 256 struct ifg_list_head *ifgh = 257 if_get_groups(packet_kif->pfik_ifp); 258 259 TAILQ_FOREACH(p, ifgh, ifgl_next) 260 if (p->ifgl_group == rule_kif->pfik_group) 261 return (1); 262 } 263 264 return (0); 265 } 266 267 void 268 pfi_attach_ifnet(struct ifnet *ifp) 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(ifp->if_xname)) == NULL) 277 panic("pfi_kif_get failed"); 278 279 kif->pfik_ifp = ifp; 280 ifp->if_pf_kif = kif; 281 282 #ifndef __NetBSD__ 283 if ((kif->pfik_ah_cookie = hook_establish(ifp->if_addrhooks, 1, 284 pfi_kifaddr_update, kif)) == NULL) 285 panic("pfi_attach_ifnet: cannot allocate '%s' address hook", 286 ifp->if_xname); 287 #endif /* !__NetBSD__ */ 288 289 pfi_kif_update(kif); 290 291 splx(s); 292 } 293 294 void 295 pfi_detach_ifnet(struct ifnet *ifp) 296 { 297 int s; 298 struct pfi_kif *kif; 299 300 if ((kif = (struct pfi_kif *)ifp->if_pf_kif) == NULL) 301 return; 302 303 s = splsoftnet(); 304 pfi_update++; 305 #ifndef __NetBSD__ 306 hook_disestablish(ifp->if_addrhooks, kif->pfik_ah_cookie); 307 #endif /* !__NetBSD__ */ 308 pfi_kif_update(kif); 309 310 kif->pfik_ifp = NULL; 311 ifp->if_pf_kif = NULL; 312 pfi_kif_unref(kif, PFI_KIF_REF_NONE); 313 splx(s); 314 } 315 316 void 317 pfi_attach_ifgroup(struct ifg_group *ifg) 318 { 319 struct pfi_kif *kif; 320 int s; 321 322 pfi_initialize(); 323 s = splsoftnet(); 324 pfi_update++; 325 if ((kif = pfi_kif_get(ifg->ifg_group)) == NULL) 326 panic("pfi_kif_get failed"); 327 328 kif->pfik_group = ifg; 329 ifg->ifg_pf_kif = kif; 330 331 splx(s); 332 } 333 334 void 335 pfi_detach_ifgroup(struct ifg_group *ifg) 336 { 337 int s; 338 struct pfi_kif *kif; 339 340 if ((kif = (struct pfi_kif *)ifg->ifg_pf_kif) == NULL) 341 return; 342 343 s = splsoftnet(); 344 pfi_update++; 345 346 kif->pfik_group = NULL; 347 ifg->ifg_pf_kif = NULL; 348 pfi_kif_unref(kif, PFI_KIF_REF_NONE); 349 splx(s); 350 } 351 352 void 353 pfi_group_change(const char *group) 354 { 355 struct pfi_kif *kif; 356 int s; 357 358 s = splsoftnet(); 359 pfi_update++; 360 if ((kif = pfi_kif_get(group)) == NULL) 361 panic("pfi_kif_get failed"); 362 363 pfi_kif_update(kif); 364 365 splx(s); 366 } 367 368 int 369 pfi_match_addr(struct pfi_dynaddr *dyn, struct pf_addr *a, sa_family_t af) 370 { 371 switch (af) { 372 #ifdef INET 373 case AF_INET: 374 switch (dyn->pfid_acnt4) { 375 case 0: 376 return (0); 377 case 1: 378 return (PF_MATCHA(0, &dyn->pfid_addr4, 379 &dyn->pfid_mask4, a, AF_INET)); 380 default: 381 return (pfr_match_addr(dyn->pfid_kt, a, AF_INET)); 382 } 383 break; 384 #endif /* INET */ 385 #ifdef INET6 386 case AF_INET6: 387 switch (dyn->pfid_acnt6) { 388 case 0: 389 return (0); 390 case 1: 391 return (PF_MATCHA(0, &dyn->pfid_addr6, 392 &dyn->pfid_mask6, a, AF_INET6)); 393 default: 394 return (pfr_match_addr(dyn->pfid_kt, a, AF_INET6)); 395 } 396 break; 397 #endif /* INET6 */ 398 default: 399 return (0); 400 } 401 } 402 403 int 404 pfi_dynaddr_setup(struct pf_addr_wrap *aw, sa_family_t af) 405 { 406 struct pfi_dynaddr *dyn; 407 char tblname[PF_TABLE_NAME_SIZE]; 408 struct pf_ruleset *ruleset = NULL; 409 int s, rv = 0; 410 411 if (aw->type != PF_ADDR_DYNIFTL) 412 return (0); 413 if ((dyn = pool_get(&pfi_addr_pl, PR_NOWAIT)) == NULL) 414 return (1); 415 bzero(dyn, sizeof(*dyn)); 416 417 s = splsoftnet(); 418 if (!strcmp(aw->v.ifname, "self")) 419 dyn->pfid_kif = pfi_kif_get(IFG_ALL); 420 else 421 dyn->pfid_kif = pfi_kif_get(aw->v.ifname); 422 if (dyn->pfid_kif == NULL) { 423 rv = 1; 424 goto _bad; 425 } 426 pfi_kif_ref(dyn->pfid_kif, PFI_KIF_REF_RULE); 427 428 dyn->pfid_net = pfi_unmask(&aw->v.a.mask); 429 if (af == AF_INET && dyn->pfid_net == 32) 430 dyn->pfid_net = 128; 431 strlcpy(tblname, aw->v.ifname, sizeof(tblname)); 432 if (aw->iflags & PFI_AFLAG_NETWORK) 433 strlcat(tblname, ":network", sizeof(tblname)); 434 if (aw->iflags & PFI_AFLAG_BROADCAST) 435 strlcat(tblname, ":broadcast", sizeof(tblname)); 436 if (aw->iflags & PFI_AFLAG_PEER) 437 strlcat(tblname, ":peer", sizeof(tblname)); 438 if (aw->iflags & PFI_AFLAG_NOALIAS) 439 strlcat(tblname, ":0", sizeof(tblname)); 440 if (dyn->pfid_net != 128) 441 snprintf(tblname + strlen(tblname), 442 sizeof(tblname) - strlen(tblname), "/%d", dyn->pfid_net); 443 if ((ruleset = pf_find_or_create_ruleset(PF_RESERVED_ANCHOR)) == NULL) { 444 rv = 1; 445 goto _bad; 446 } 447 448 if ((dyn->pfid_kt = pfr_attach_table(ruleset, tblname)) == NULL) { 449 rv = 1; 450 goto _bad; 451 } 452 453 dyn->pfid_kt->pfrkt_flags |= PFR_TFLAG_ACTIVE; 454 dyn->pfid_iflags = aw->iflags; 455 dyn->pfid_af = af; 456 457 TAILQ_INSERT_TAIL(&dyn->pfid_kif->pfik_dynaddrs, dyn, entry); 458 aw->p.dyn = dyn; 459 pfi_kif_update(dyn->pfid_kif); 460 splx(s); 461 return (0); 462 463 _bad: 464 if (dyn->pfid_kt != NULL) 465 pfr_detach_table(dyn->pfid_kt); 466 if (ruleset != NULL) 467 pf_remove_if_empty_ruleset(ruleset); 468 if (dyn->pfid_kif != NULL) 469 pfi_kif_unref(dyn->pfid_kif, PFI_KIF_REF_RULE); 470 pool_put(&pfi_addr_pl, dyn); 471 splx(s); 472 return (rv); 473 } 474 475 void 476 pfi_kif_update(struct pfi_kif *kif) 477 { 478 struct ifg_list *ifgl; 479 struct pfi_dynaddr *p; 480 481 /* update all dynaddr */ 482 TAILQ_FOREACH(p, &kif->pfik_dynaddrs, entry) 483 pfi_dynaddr_update(p); 484 485 /* again for all groups kif is member of */ 486 if (kif->pfik_ifp != NULL) { 487 struct ifg_list_head *ifgh = if_get_groups(kif->pfik_ifp); 488 489 TAILQ_FOREACH(ifgl, ifgh, ifgl_next) 490 pfi_kif_update((struct pfi_kif *) 491 ifgl->ifgl_group->ifg_pf_kif); 492 } 493 } 494 495 void 496 pfi_dynaddr_update(struct pfi_dynaddr *dyn) 497 { 498 struct pfi_kif *kif; 499 struct pfr_ktable *kt; 500 501 if (dyn == NULL || dyn->pfid_kif == NULL || dyn->pfid_kt == NULL) 502 panic("pfi_dynaddr_update"); 503 504 kif = dyn->pfid_kif; 505 kt = dyn->pfid_kt; 506 507 if (kt->pfrkt_larg != pfi_update) { 508 /* this table needs to be brought up-to-date */ 509 pfi_table_update(kt, kif, dyn->pfid_net, dyn->pfid_iflags); 510 kt->pfrkt_larg = pfi_update; 511 } 512 pfr_dynaddr_update(kt, dyn); 513 } 514 515 void 516 pfi_table_update(struct pfr_ktable *kt, struct pfi_kif *kif, int net, int flags) 517 { 518 int e, size2 = 0; 519 struct ifg_member *ifgm; 520 521 pfi_buffer_cnt = 0; 522 523 if (kif->pfik_ifp != NULL) 524 pfi_instance_add(kif->pfik_ifp, net, flags); 525 else if (kif->pfik_group != NULL) 526 TAILQ_FOREACH(ifgm, &kif->pfik_group->ifg_members, ifgm_next) 527 pfi_instance_add(ifgm->ifgm_ifp, net, flags); 528 529 if ((e = pfr_set_addrs(&kt->pfrkt_t, pfi_buffer, pfi_buffer_cnt, &size2, 530 NULL, NULL, NULL, 0, PFR_TFLAG_ALLMASK))) 531 printf("pfi_table_update: cannot set %d new addresses " 532 "into table %s: %d\n", pfi_buffer_cnt, kt->pfrkt_name, e); 533 } 534 535 void 536 pfi_instance_add(struct ifnet *ifp, int net, int flags) 537 { 538 struct ifaddr *ia; 539 int got4 = 0, got6 = 0; 540 int net2, af; 541 542 if (ifp == NULL) 543 return; 544 IFADDR_FOREACH(ia, ifp) { 545 if (ia->ifa_addr == NULL) 546 continue; 547 af = ia->ifa_addr->sa_family; 548 if (af != AF_INET && af != AF_INET6) 549 continue; 550 if ((flags & PFI_AFLAG_BROADCAST) && af == AF_INET6) 551 continue; 552 if ((flags & PFI_AFLAG_BROADCAST) && 553 !(ifp->if_flags & IFF_BROADCAST)) 554 continue; 555 if ((flags & PFI_AFLAG_PEER) && 556 !(ifp->if_flags & IFF_POINTOPOINT)) 557 continue; 558 if ((flags & PFI_AFLAG_NETWORK) && af == AF_INET6 && 559 IN6_IS_ADDR_LINKLOCAL( 560 &((struct sockaddr_in6 *)ia->ifa_addr)->sin6_addr)) 561 continue; 562 if (flags & PFI_AFLAG_NOALIAS) { 563 if (af == AF_INET && got4) 564 continue; 565 if (af == AF_INET6 && got6) 566 continue; 567 } 568 if (af == AF_INET) 569 got4 = 1; 570 else if (af == AF_INET6) 571 got6 = 1; 572 net2 = net; 573 if (net2 == 128 && (flags & PFI_AFLAG_NETWORK)) { 574 if (af == AF_INET) 575 net2 = pfi_unmask(&((struct sockaddr_in *) 576 ia->ifa_netmask)->sin_addr); 577 else if (af == AF_INET6) 578 net2 = pfi_unmask(&((struct sockaddr_in6 *) 579 ia->ifa_netmask)->sin6_addr); 580 } 581 if (af == AF_INET && net2 > 32) 582 net2 = 32; 583 if (flags & PFI_AFLAG_BROADCAST) 584 pfi_address_add(ia->ifa_broadaddr, af, net2); 585 else if (flags & PFI_AFLAG_PEER) 586 pfi_address_add(ia->ifa_dstaddr, af, net2); 587 else 588 pfi_address_add(ia->ifa_addr, af, net2); 589 } 590 } 591 592 void 593 pfi_address_add(struct sockaddr *sa, int af, int net) 594 { 595 struct pfr_addr *p; 596 int i; 597 598 if (pfi_buffer_cnt >= pfi_buffer_max) { 599 int new_max = pfi_buffer_max * 2; 600 601 if (new_max > PFI_BUFFER_MAX) { 602 printf("pfi_address_add: address buffer full (%d/%d)\n", 603 pfi_buffer_cnt, PFI_BUFFER_MAX); 604 return; 605 } 606 p = malloc(new_max * sizeof(*pfi_buffer), PFI_MTYPE, 607 M_DONTWAIT); 608 if (p == NULL) { 609 printf("pfi_address_add: no memory to grow buffer " 610 "(%d/%d)\n", pfi_buffer_cnt, PFI_BUFFER_MAX); 611 return; 612 } 613 memcpy(pfi_buffer, p, pfi_buffer_cnt * sizeof(*pfi_buffer)); 614 /* no need to zero buffer */ 615 free(pfi_buffer, PFI_MTYPE); 616 pfi_buffer = p; 617 pfi_buffer_max = new_max; 618 } 619 if (af == AF_INET && net > 32) 620 net = 128; 621 p = pfi_buffer + pfi_buffer_cnt++; 622 bzero(p, sizeof(*p)); 623 p->pfra_af = af; 624 p->pfra_net = net; 625 if (af == AF_INET) 626 p->pfra_ip4addr = ((struct sockaddr_in *)sa)->sin_addr; 627 else if (af == AF_INET6) { 628 p->pfra_ip6addr = ((struct sockaddr_in6 *)sa)->sin6_addr; 629 if (IN6_IS_SCOPE_EMBEDDABLE(&p->pfra_ip6addr)) 630 p->pfra_ip6addr.s6_addr16[1] = 0; 631 } 632 /* mask network address bits */ 633 if (net < 128) 634 ((char *)p)[p->pfra_net/8] &= ~(0xFF >> (p->pfra_net%8)); 635 for (i = (p->pfra_net+7)/8; i < sizeof(p->pfra_u); i++) 636 ((char *)p)[i] = 0; 637 } 638 639 void 640 pfi_dynaddr_remove(struct pf_addr_wrap *aw) 641 { 642 int s; 643 644 if (aw->type != PF_ADDR_DYNIFTL || aw->p.dyn == NULL || 645 aw->p.dyn->pfid_kif == NULL || aw->p.dyn->pfid_kt == NULL) 646 return; 647 648 s = splsoftnet(); 649 TAILQ_REMOVE(&aw->p.dyn->pfid_kif->pfik_dynaddrs, aw->p.dyn, entry); 650 pfi_kif_unref(aw->p.dyn->pfid_kif, PFI_KIF_REF_RULE); 651 aw->p.dyn->pfid_kif = NULL; 652 pfr_detach_table(aw->p.dyn->pfid_kt); 653 aw->p.dyn->pfid_kt = NULL; 654 pool_put(&pfi_addr_pl, aw->p.dyn); 655 aw->p.dyn = NULL; 656 splx(s); 657 } 658 659 void 660 pfi_dynaddr_copyout(struct pf_addr_wrap *aw) 661 { 662 if (aw->type != PF_ADDR_DYNIFTL || aw->p.dyn == NULL || 663 aw->p.dyn->pfid_kif == NULL) 664 return; 665 aw->p.dyncnt = aw->p.dyn->pfid_acnt4 + aw->p.dyn->pfid_acnt6; 666 } 667 668 void 669 pfi_kifaddr_update(void *v) 670 { 671 int s; 672 struct pfi_kif *kif = (struct pfi_kif *)v; 673 674 s = splsoftnet(); 675 pfi_update++; 676 pfi_kif_update(kif); 677 splx(s); 678 } 679 680 int 681 pfi_if_compare(struct pfi_kif *p, struct pfi_kif *q) 682 { 683 return (strncmp(p->pfik_name, q->pfik_name, IFNAMSIZ)); 684 } 685 686 void 687 pfi_fill_oldstatus(struct pf_status *pfs) 688 { 689 struct pfi_kif *p; 690 struct pfi_kif_cmp key; 691 int i, j, k, s; 692 693 strlcpy(key.pfik_name, pfs->ifname, sizeof(key.pfik_name)); 694 s = splsoftnet(); 695 p = RB_FIND(pfi_ifhead, &pfi_ifs, (struct pfi_kif *)&key); 696 if (p == NULL) { 697 splx(s); 698 return; 699 } 700 bzero(pfs->pcounters, sizeof(pfs->pcounters)); 701 bzero(pfs->bcounters, sizeof(pfs->bcounters)); 702 for (i = 0; i < 2; i++) 703 for (j = 0; j < 2; j++) 704 for (k = 0; k < 2; k++) { 705 pfs->pcounters[i][j][k] = 706 p->pfik_packets[i][j][k]; 707 pfs->bcounters[i][j] += 708 p->pfik_bytes[i][j][k]; 709 } 710 splx(s); 711 } 712 713 int 714 pfi_clr_istats(const char *name) 715 { 716 struct pfi_kif *p; 717 int s; 718 719 s = splsoftnet(); 720 RB_FOREACH(p, pfi_ifhead, &pfi_ifs) { 721 if (pfi_skip_if(name, p)) 722 continue; 723 bzero(p->pfik_packets, sizeof(p->pfik_packets)); 724 bzero(p->pfik_bytes, sizeof(p->pfik_bytes)); 725 p->pfik_tzero = time_second; 726 } 727 splx(s); 728 729 return (0); 730 } 731 732 int 733 pfi_get_ifaces(const char *name, struct pfi_kif *buf, int *size) 734 { 735 struct pfi_kif *p, *nextp; 736 int s, n = 0; 737 738 s = splsoftnet(); 739 for (p = RB_MIN(pfi_ifhead, &pfi_ifs); p; p = nextp) { 740 nextp = RB_NEXT(pfi_ifhead, &pfi_ifs, p); 741 if (pfi_skip_if(name, p)) 742 continue; 743 if (*size > n++) { 744 if (!p->pfik_tzero) 745 p->pfik_tzero = time_second; 746 pfi_kif_ref(p, PFI_KIF_REF_RULE); 747 if (copyout(p, buf++, sizeof(*buf))) { 748 pfi_kif_unref(p, PFI_KIF_REF_RULE); 749 splx(s); 750 return (EFAULT); 751 } 752 nextp = RB_NEXT(pfi_ifhead, &pfi_ifs, p); 753 pfi_kif_unref(p, PFI_KIF_REF_RULE); 754 } 755 } 756 splx(s); 757 *size = n; 758 return (0); 759 } 760 761 int 762 pfi_skip_if(const char *filter, struct pfi_kif *p) 763 { 764 int n; 765 766 if (filter == NULL || !*filter) 767 return (0); 768 if (!strcmp(p->pfik_name, filter)) 769 return (0); /* exact match */ 770 n = strlen(filter); 771 if (n < 1 || n >= IFNAMSIZ) 772 return (1); /* sanity check */ 773 if (filter[n-1] >= '0' && filter[n-1] <= '9') 774 return (1); /* only do exact match in that case */ 775 if (strncmp(p->pfik_name, filter, n)) 776 return (1); /* prefix doesn't match */ 777 return (p->pfik_name[n] < '0' || p->pfik_name[n] > '9'); 778 } 779 780 int 781 pfi_set_flags(const char *name, int flags) 782 { 783 struct pfi_kif *p; 784 int s; 785 786 s = splsoftnet(); 787 RB_FOREACH(p, pfi_ifhead, &pfi_ifs) { 788 if (pfi_skip_if(name, p)) 789 continue; 790 p->pfik_flags |= flags; 791 } 792 splx(s); 793 return (0); 794 } 795 796 int 797 pfi_clear_flags(const char *name, int flags) 798 { 799 struct pfi_kif *p; 800 int s; 801 802 s = splsoftnet(); 803 RB_FOREACH(p, pfi_ifhead, &pfi_ifs) { 804 if (pfi_skip_if(name, p)) 805 continue; 806 p->pfik_flags &= ~flags; 807 } 808 splx(s); 809 return (0); 810 } 811 812 /* from pf_print_state.c */ 813 int 814 pfi_unmask(void *addr) 815 { 816 struct pf_addr *m = addr; 817 int i = 31, j = 0, b = 0; 818 u_int32_t tmp; 819 820 while (j < 4 && m->addr32[j] == 0xffffffff) { 821 b += 32; 822 j++; 823 } 824 if (j < 4) { 825 tmp = ntohl(m->addr32[j]); 826 for (i = 31; tmp & (1 << i); --i) 827 b++; 828 } 829 return (b); 830 } 831 832 #ifdef __NetBSD__ 833 static void 834 pfi_copy_group(char *dest, const char *src, ssize_t sz) 835 { 836 while (sz > 1 && *src && !(*src >= '0' && *src <= '9')) { 837 *dest++ = *src++; 838 sz--; 839 } 840 if (sz > 0) 841 *dest++ = '\0'; 842 } 843 844 void 845 pfi_init_groups(struct ifnet *ifp) 846 { 847 char group[IFNAMSIZ]; 848 849 if_init_groups(ifp); 850 if_addgroup(ifp, IFG_ALL); 851 852 pfi_copy_group(group, ifp->if_xname, sizeof(group)); 853 if_addgroup(ifp, group); 854 } 855 856 void 857 pfi_destroy_groups(struct ifnet *ifp) 858 { 859 char group[IFNAMSIZ]; 860 861 pfi_copy_group(group, ifp->if_xname, sizeof(group)); 862 if_delgroup(ifp, group); 863 864 if_delgroup(ifp, IFG_ALL); 865 if_destroy_groups(ifp); 866 } 867 868 int 869 pfil_ifnet_wrapper(void *arg, struct mbuf **mp, struct ifnet *ifp, int dir) 870 { 871 u_long cmd = (u_long)mp; 872 873 switch (cmd) { 874 case PFIL_IFNET_ATTACH: 875 pfi_init_groups(ifp); 876 877 pfi_attach_ifnet(ifp); 878 break; 879 case PFIL_IFNET_DETACH: 880 pfi_detach_ifnet(ifp); 881 882 pfi_destroy_groups(ifp); 883 break; 884 default: 885 panic("pfil_ifnet_wrapper: unexpected cmd %lu", cmd); 886 } 887 888 return (0); 889 } 890 891 int 892 pfil_ifaddr_wrapper(void *arg, struct mbuf **mp, struct ifnet *ifp, int dir) 893 { 894 u_long cmd = (u_long)mp; 895 896 switch (cmd) { 897 case SIOCSIFADDR: 898 case SIOCAIFADDR: 899 case SIOCDIFADDR: 900 #ifdef INET6 901 case SIOCAIFADDR_IN6: 902 case SIOCDIFADDR_IN6: 903 #endif /* INET6 */ 904 pfi_kifaddr_update(ifp->if_pf_kif); 905 break; 906 default: 907 panic("pfil_ifaddr_wrapper: unexpected ioctl %lu", cmd); 908 } 909 910 return (0); 911 } 912 #endif /* __NetBSD__ */ 913
Indexes created Tue Oct 14 06:10:07 GMT 2025