pf_if.c revision 1.18
1 /* $NetBSD: pf_if.c,v 1.18 2008/12/19 18:49:38 cegger 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 1.18 2008/12/19 18:49:38 cegger 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 struct pfi_kif *p; 146 int i; 147 148 pfil_remove_hook(pfil_ifaddr_wrapper, NULL, PFIL_IFADDR, &if_pfil); 149 pfil_remove_hook(pfil_ifnet_wrapper, NULL, PFIL_IFNET, &if_pfil); 150 151 for (i = 0; i < if_indexlim; i++) { 152 struct ifnet *ifp = ifindex2ifnet[i]; 153 154 if (ifp != NULL) { 155 pfi_detach_ifnet(ifp); 156 157 pfi_destroy_groups(ifp); 158 } 159 } 160 161 while ((p = RB_MIN(pfi_ifhead, &pfi_ifs))) { 162 RB_REMOVE(pfi_ifhead, &pfi_ifs, p); 163 free(p, PFI_MTYPE); 164 } 165 166 pool_destroy(&pfi_addr_pl); 167 168 free(pfi_buffer, PFI_MTYPE); 169 } 170 #endif /* _LKM */ 171 172 struct pfi_kif * 173 pfi_kif_get(const char *kif_name) 174 { 175 struct pfi_kif *kif; 176 struct pfi_kif_cmp s; 177 178 bzero(&s, sizeof(s)); 179 strlcpy(s.pfik_name, kif_name, sizeof(s.pfik_name)); 180 if ((kif = RB_FIND(pfi_ifhead, &pfi_ifs, (struct pfi_kif *)&s)) != NULL) 181 return (kif); 182 183 /* create new one */ 184 if ((kif = malloc(sizeof(*kif), PFI_MTYPE, M_NOWAIT|M_ZERO)) == NULL) 185 return (NULL); 186 187 strlcpy(kif->pfik_name, kif_name, sizeof(kif->pfik_name)); 188 #ifdef __NetBSD__ 189 /* time_second is not valid yet */ 190 kif->pfik_tzero = (time_second > 7200) ? time_second : 0; 191 #else 192 kif->pfik_tzero = time_second; 193 #endif /* !__NetBSD__ */ 194 TAILQ_INIT(&kif->pfik_dynaddrs); 195 196 RB_INSERT(pfi_ifhead, &pfi_ifs, kif); 197 return (kif); 198 } 199 200 void 201 pfi_kif_ref(struct pfi_kif *kif, enum pfi_kif_refs what) 202 { 203 switch (what) { 204 case PFI_KIF_REF_RULE: 205 kif->pfik_rules++; 206 break; 207 case PFI_KIF_REF_STATE: 208 kif->pfik_states++; 209 break; 210 default: 211 panic("pfi_kif_ref with unknown type"); 212 } 213 } 214 215 void 216 pfi_kif_unref(struct pfi_kif *kif, enum pfi_kif_refs what) 217 { 218 if (kif == NULL) 219 return; 220 221 switch (what) { 222 case PFI_KIF_REF_NONE: 223 break; 224 case PFI_KIF_REF_RULE: 225 if (kif->pfik_rules <= 0) { 226 printf("pfi_kif_unref: rules refcount <= 0\n"); 227 return; 228 } 229 kif->pfik_rules--; 230 break; 231 case PFI_KIF_REF_STATE: 232 if (kif->pfik_states <= 0) { 233 printf("pfi_kif_unref: state refcount <= 0\n"); 234 return; 235 } 236 kif->pfik_states--; 237 break; 238 default: 239 panic("pfi_kif_unref with unknown type"); 240 } 241 242 if (kif->pfik_ifp != NULL || kif->pfik_group != NULL || kif == pfi_all) 243 return; 244 245 if (kif->pfik_rules || kif->pfik_states) 246 return; 247 248 RB_REMOVE(pfi_ifhead, &pfi_ifs, kif); 249 free(kif, PFI_MTYPE); 250 } 251 252 int 253 pfi_kif_match(struct pfi_kif *rule_kif, struct pfi_kif *packet_kif) 254 { 255 struct ifg_list *p; 256 257 if (rule_kif == NULL || rule_kif == packet_kif) 258 return (1); 259 260 if (rule_kif->pfik_group != NULL) { 261 struct ifg_list_head *ifgh = 262 if_get_groups(packet_kif->pfik_ifp); 263 264 TAILQ_FOREACH(p, ifgh, ifgl_next) 265 if (p->ifgl_group == rule_kif->pfik_group) 266 return (1); 267 } 268 269 return (0); 270 } 271 272 void 273 pfi_attach_ifnet(struct ifnet *ifp) 274 { 275 struct pfi_kif *kif; 276 int s; 277 278 pfi_initialize(); 279 s = splsoftnet(); 280 pfi_update++; 281 if ((kif = pfi_kif_get(ifp->if_xname)) == NULL) 282 panic("pfi_kif_get failed"); 283 284 kif->pfik_ifp = ifp; 285 ifp->if_pf_kif = kif; 286 287 #ifndef __NetBSD__ 288 if ((kif->pfik_ah_cookie = hook_establish(ifp->if_addrhooks, 1, 289 pfi_kifaddr_update, kif)) == NULL) 290 panic("pfi_attach_ifnet: cannot allocate '%s' address hook", 291 ifp->if_xname); 292 #endif /* !__NetBSD__ */ 293 294 pfi_kif_update(kif); 295 296 splx(s); 297 } 298 299 void 300 pfi_detach_ifnet(struct ifnet *ifp) 301 { 302 int s; 303 struct pfi_kif *kif; 304 305 if ((kif = (struct pfi_kif *)ifp->if_pf_kif) == NULL) 306 return; 307 308 s = splsoftnet(); 309 pfi_update++; 310 #ifndef __NetBSD__ 311 hook_disestablish(ifp->if_addrhooks, kif->pfik_ah_cookie); 312 #endif /* !__NetBSD__ */ 313 pfi_kif_update(kif); 314 315 kif->pfik_ifp = NULL; 316 ifp->if_pf_kif = NULL; 317 pfi_kif_unref(kif, PFI_KIF_REF_NONE); 318 splx(s); 319 } 320 321 void 322 pfi_attach_ifgroup(struct ifg_group *ifg) 323 { 324 struct pfi_kif *kif; 325 int s; 326 327 pfi_initialize(); 328 s = splsoftnet(); 329 pfi_update++; 330 if ((kif = pfi_kif_get(ifg->ifg_group)) == NULL) 331 panic("pfi_kif_get failed"); 332 333 kif->pfik_group = ifg; 334 ifg->ifg_pf_kif = kif; 335 336 splx(s); 337 } 338 339 void 340 pfi_detach_ifgroup(struct ifg_group *ifg) 341 { 342 int s; 343 struct pfi_kif *kif; 344 345 if ((kif = (struct pfi_kif *)ifg->ifg_pf_kif) == NULL) 346 return; 347 348 s = splsoftnet(); 349 pfi_update++; 350 351 kif->pfik_group = NULL; 352 ifg->ifg_pf_kif = NULL; 353 pfi_kif_unref(kif, PFI_KIF_REF_NONE); 354 splx(s); 355 } 356 357 void 358 pfi_group_change(const char *group) 359 { 360 struct pfi_kif *kif; 361 int s; 362 363 s = splsoftnet(); 364 pfi_update++; 365 if ((kif = pfi_kif_get(group)) == NULL) 366 panic("pfi_kif_get failed"); 367 368 pfi_kif_update(kif); 369 370 splx(s); 371 } 372 373 int 374 pfi_match_addr(struct pfi_dynaddr *dyn, struct pf_addr *a, sa_family_t af) 375 { 376 switch (af) { 377 #ifdef INET 378 case AF_INET: 379 switch (dyn->pfid_acnt4) { 380 case 0: 381 return (0); 382 case 1: 383 return (PF_MATCHA(0, &dyn->pfid_addr4, 384 &dyn->pfid_mask4, a, AF_INET)); 385 default: 386 return (pfr_match_addr(dyn->pfid_kt, a, AF_INET)); 387 } 388 break; 389 #endif /* INET */ 390 #ifdef INET6 391 case AF_INET6: 392 switch (dyn->pfid_acnt6) { 393 case 0: 394 return (0); 395 case 1: 396 return (PF_MATCHA(0, &dyn->pfid_addr6, 397 &dyn->pfid_mask6, a, AF_INET6)); 398 default: 399 return (pfr_match_addr(dyn->pfid_kt, a, AF_INET6)); 400 } 401 break; 402 #endif /* INET6 */ 403 default: 404 return (0); 405 } 406 } 407 408 int 409 pfi_dynaddr_setup(struct pf_addr_wrap *aw, sa_family_t af) 410 { 411 struct pfi_dynaddr *dyn; 412 char tblname[PF_TABLE_NAME_SIZE]; 413 struct pf_ruleset *ruleset = NULL; 414 int s, rv = 0; 415 416 if (aw->type != PF_ADDR_DYNIFTL) 417 return (0); 418 if ((dyn = pool_get(&pfi_addr_pl, PR_NOWAIT)) == NULL) 419 return (1); 420 bzero(dyn, sizeof(*dyn)); 421 422 s = splsoftnet(); 423 if (!strcmp(aw->v.ifname, "self")) 424 dyn->pfid_kif = pfi_kif_get(IFG_ALL); 425 else 426 dyn->pfid_kif = pfi_kif_get(aw->v.ifname); 427 if (dyn->pfid_kif == NULL) { 428 rv = 1; 429 goto _bad; 430 } 431 pfi_kif_ref(dyn->pfid_kif, PFI_KIF_REF_RULE); 432 433 dyn->pfid_net = pfi_unmask(&aw->v.a.mask); 434 if (af == AF_INET && dyn->pfid_net == 32) 435 dyn->pfid_net = 128; 436 strlcpy(tblname, aw->v.ifname, sizeof(tblname)); 437 if (aw->iflags & PFI_AFLAG_NETWORK) 438 strlcat(tblname, ":network", sizeof(tblname)); 439 if (aw->iflags & PFI_AFLAG_BROADCAST) 440 strlcat(tblname, ":broadcast", sizeof(tblname)); 441 if (aw->iflags & PFI_AFLAG_PEER) 442 strlcat(tblname, ":peer", sizeof(tblname)); 443 if (aw->iflags & PFI_AFLAG_NOALIAS) 444 strlcat(tblname, ":0", sizeof(tblname)); 445 if (dyn->pfid_net != 128) 446 snprintf(tblname + strlen(tblname), 447 sizeof(tblname) - strlen(tblname), "/%d", dyn->pfid_net); 448 if ((ruleset = pf_find_or_create_ruleset(PF_RESERVED_ANCHOR)) == NULL) { 449 rv = 1; 450 goto _bad; 451 } 452 453 if ((dyn->pfid_kt = pfr_attach_table(ruleset, tblname)) == NULL) { 454 rv = 1; 455 goto _bad; 456 } 457 458 dyn->pfid_kt->pfrkt_flags |= PFR_TFLAG_ACTIVE; 459 dyn->pfid_iflags = aw->iflags; 460 dyn->pfid_af = af; 461 462 TAILQ_INSERT_TAIL(&dyn->pfid_kif->pfik_dynaddrs, dyn, entry); 463 aw->p.dyn = dyn; 464 pfi_kif_update(dyn->pfid_kif); 465 splx(s); 466 return (0); 467 468 _bad: 469 if (dyn->pfid_kt != NULL) 470 pfr_detach_table(dyn->pfid_kt); 471 if (ruleset != NULL) 472 pf_remove_if_empty_ruleset(ruleset); 473 if (dyn->pfid_kif != NULL) 474 pfi_kif_unref(dyn->pfid_kif, PFI_KIF_REF_RULE); 475 pool_put(&pfi_addr_pl, dyn); 476 splx(s); 477 return (rv); 478 } 479 480 void 481 pfi_kif_update(struct pfi_kif *kif) 482 { 483 struct ifg_list *ifgl; 484 struct pfi_dynaddr *p; 485 486 /* update all dynaddr */ 487 TAILQ_FOREACH(p, &kif->pfik_dynaddrs, entry) 488 pfi_dynaddr_update(p); 489 490 /* again for all groups kif is member of */ 491 if (kif->pfik_ifp != NULL) { 492 struct ifg_list_head *ifgh = if_get_groups(kif->pfik_ifp); 493 494 TAILQ_FOREACH(ifgl, ifgh, ifgl_next) 495 pfi_kif_update((struct pfi_kif *) 496 ifgl->ifgl_group->ifg_pf_kif); 497 } 498 } 499 500 void 501 pfi_dynaddr_update(struct pfi_dynaddr *dyn) 502 { 503 struct pfi_kif *kif; 504 struct pfr_ktable *kt; 505 506 if (dyn == NULL || dyn->pfid_kif == NULL || dyn->pfid_kt == NULL) 507 panic("pfi_dynaddr_update"); 508 509 kif = dyn->pfid_kif; 510 kt = dyn->pfid_kt; 511 512 if (kt->pfrkt_larg != pfi_update) { 513 /* this table needs to be brought up-to-date */ 514 pfi_table_update(kt, kif, dyn->pfid_net, dyn->pfid_iflags); 515 kt->pfrkt_larg = pfi_update; 516 } 517 pfr_dynaddr_update(kt, dyn); 518 } 519 520 void 521 pfi_table_update(struct pfr_ktable *kt, struct pfi_kif *kif, int net, int flags) 522 { 523 int e, size2 = 0; 524 struct ifg_member *ifgm; 525 526 pfi_buffer_cnt = 0; 527 528 if (kif->pfik_ifp != NULL) 529 pfi_instance_add(kif->pfik_ifp, net, flags); 530 else if (kif->pfik_group != NULL) 531 TAILQ_FOREACH(ifgm, &kif->pfik_group->ifg_members, ifgm_next) 532 pfi_instance_add(ifgm->ifgm_ifp, net, flags); 533 534 if ((e = pfr_set_addrs(&kt->pfrkt_t, pfi_buffer, pfi_buffer_cnt, &size2, 535 NULL, NULL, NULL, 0, PFR_TFLAG_ALLMASK))) 536 printf("pfi_table_update: cannot set %d new addresses " 537 "into table %s: %d\n", pfi_buffer_cnt, kt->pfrkt_name, e); 538 } 539 540 void 541 pfi_instance_add(struct ifnet *ifp, int net, int flags) 542 { 543 struct ifaddr *ia; 544 int got4 = 0, got6 = 0; 545 int net2, af; 546 547 if (ifp == NULL) 548 return; 549 IFADDR_FOREACH(ia, ifp) { 550 if (ia->ifa_addr == NULL) 551 continue; 552 af = ia->ifa_addr->sa_family; 553 if (af != AF_INET && af != AF_INET6) 554 continue; 555 if ((flags & PFI_AFLAG_BROADCAST) && af == AF_INET6) 556 continue; 557 if ((flags & PFI_AFLAG_BROADCAST) && 558 !(ifp->if_flags & IFF_BROADCAST)) 559 continue; 560 if ((flags & PFI_AFLAG_PEER) && 561 !(ifp->if_flags & IFF_POINTOPOINT)) 562 continue; 563 if ((flags & PFI_AFLAG_NETWORK) && af == AF_INET6 && 564 IN6_IS_ADDR_LINKLOCAL( 565 &((struct sockaddr_in6 *)ia->ifa_addr)->sin6_addr)) 566 continue; 567 if (flags & PFI_AFLAG_NOALIAS) { 568 if (af == AF_INET && got4) 569 continue; 570 if (af == AF_INET6 && got6) 571 continue; 572 } 573 if (af == AF_INET) 574 got4 = 1; 575 else if (af == AF_INET6) 576 got6 = 1; 577 net2 = net; 578 if (net2 == 128 && (flags & PFI_AFLAG_NETWORK)) { 579 if (af == AF_INET) 580 net2 = pfi_unmask(&((struct sockaddr_in *) 581 ia->ifa_netmask)->sin_addr); 582 else if (af == AF_INET6) 583 net2 = pfi_unmask(&((struct sockaddr_in6 *) 584 ia->ifa_netmask)->sin6_addr); 585 } 586 if (af == AF_INET && net2 > 32) 587 net2 = 32; 588 if (flags & PFI_AFLAG_BROADCAST) 589 pfi_address_add(ia->ifa_broadaddr, af, net2); 590 else if (flags & PFI_AFLAG_PEER) 591 pfi_address_add(ia->ifa_dstaddr, af, net2); 592 else 593 pfi_address_add(ia->ifa_addr, af, net2); 594 } 595 } 596 597 void 598 pfi_address_add(struct sockaddr *sa, int af, int net) 599 { 600 struct pfr_addr *p; 601 int i; 602 603 if (pfi_buffer_cnt >= pfi_buffer_max) { 604 int new_max = pfi_buffer_max * 2; 605 606 if (new_max > PFI_BUFFER_MAX) { 607 printf("pfi_address_add: address buffer full (%d/%d)\n", 608 pfi_buffer_cnt, PFI_BUFFER_MAX); 609 return; 610 } 611 p = malloc(new_max * sizeof(*pfi_buffer), PFI_MTYPE, M_NOWAIT); 612 if (p == NULL) { 613 printf("pfi_address_add: no memory to grow buffer " 614 "(%d/%d)\n", pfi_buffer_cnt, PFI_BUFFER_MAX); 615 return; 616 } 617 memcpy(pfi_buffer, p, pfi_buffer_cnt * sizeof(*pfi_buffer)); 618 /* no need to zero buffer */ 619 free(pfi_buffer, PFI_MTYPE); 620 pfi_buffer = p; 621 pfi_buffer_max = new_max; 622 } 623 if (af == AF_INET && net > 32) 624 net = 128; 625 p = pfi_buffer + pfi_buffer_cnt++; 626 bzero(p, sizeof(*p)); 627 p->pfra_af = af; 628 p->pfra_net = net; 629 if (af == AF_INET) 630 p->pfra_ip4addr = ((struct sockaddr_in *)sa)->sin_addr; 631 else if (af == AF_INET6) { 632 p->pfra_ip6addr = ((struct sockaddr_in6 *)sa)->sin6_addr; 633 if (IN6_IS_SCOPE_EMBEDDABLE(&p->pfra_ip6addr)) 634 p->pfra_ip6addr.s6_addr16[1] = 0; 635 } 636 /* mask network address bits */ 637 if (net < 128) 638 ((char *)p)[p->pfra_net/8] &= ~(0xFF >> (p->pfra_net%8)); 639 for (i = (p->pfra_net+7)/8; i < sizeof(p->pfra_u); i++) 640 ((char *)p)[i] = 0; 641 } 642 643 void 644 pfi_dynaddr_remove(struct pf_addr_wrap *aw) 645 { 646 int s; 647 648 if (aw->type != PF_ADDR_DYNIFTL || aw->p.dyn == NULL || 649 aw->p.dyn->pfid_kif == NULL || aw->p.dyn->pfid_kt == NULL) 650 return; 651 652 s = splsoftnet(); 653 TAILQ_REMOVE(&aw->p.dyn->pfid_kif->pfik_dynaddrs, aw->p.dyn, entry); 654 pfi_kif_unref(aw->p.dyn->pfid_kif, PFI_KIF_REF_RULE); 655 aw->p.dyn->pfid_kif = NULL; 656 pfr_detach_table(aw->p.dyn->pfid_kt); 657 aw->p.dyn->pfid_kt = NULL; 658 pool_put(&pfi_addr_pl, aw->p.dyn); 659 aw->p.dyn = NULL; 660 splx(s); 661 } 662 663 void 664 pfi_dynaddr_copyout(struct pf_addr_wrap *aw) 665 { 666 if (aw->type != PF_ADDR_DYNIFTL || aw->p.dyn == NULL || 667 aw->p.dyn->pfid_kif == NULL) 668 return; 669 aw->p.dyncnt = aw->p.dyn->pfid_acnt4 + aw->p.dyn->pfid_acnt6; 670 } 671 672 void 673 pfi_kifaddr_update(void *v) 674 { 675 int s; 676 struct pfi_kif *kif = (struct pfi_kif *)v; 677 678 s = splsoftnet(); 679 pfi_update++; 680 pfi_kif_update(kif); 681 splx(s); 682 } 683 684 int 685 pfi_if_compare(struct pfi_kif *p, struct pfi_kif *q) 686 { 687 return (strncmp(p->pfik_name, q->pfik_name, IFNAMSIZ)); 688 } 689 690 void 691 pfi_fill_oldstatus(struct pf_status *pfs) 692 { 693 struct pfi_kif *p; 694 struct pfi_kif_cmp key; 695 int i, j, k, s; 696 697 strlcpy(key.pfik_name, pfs->ifname, sizeof(key.pfik_name)); 698 s = splsoftnet(); 699 p = RB_FIND(pfi_ifhead, &pfi_ifs, (struct pfi_kif *)&key); 700 if (p == NULL) { 701 splx(s); 702 return; 703 } 704 bzero(pfs->pcounters, sizeof(pfs->pcounters)); 705 bzero(pfs->bcounters, sizeof(pfs->bcounters)); 706 for (i = 0; i < 2; i++) 707 for (j = 0; j < 2; j++) 708 for (k = 0; k < 2; k++) { 709 pfs->pcounters[i][j][k] = 710 p->pfik_packets[i][j][k]; 711 pfs->bcounters[i][j] += 712 p->pfik_bytes[i][j][k]; 713 } 714 splx(s); 715 } 716 717 int 718 pfi_clr_istats(const char *name) 719 { 720 struct pfi_kif *p; 721 int s; 722 723 s = splsoftnet(); 724 RB_FOREACH(p, pfi_ifhead, &pfi_ifs) { 725 if (pfi_skip_if(name, p)) 726 continue; 727 bzero(p->pfik_packets, sizeof(p->pfik_packets)); 728 bzero(p->pfik_bytes, sizeof(p->pfik_bytes)); 729 p->pfik_tzero = time_second; 730 } 731 splx(s); 732 733 return (0); 734 } 735 736 int 737 pfi_get_ifaces(const char *name, struct pfi_kif *buf, int *size) 738 { 739 struct pfi_kif *p, *nextp; 740 int s, n = 0; 741 742 s = splsoftnet(); 743 for (p = RB_MIN(pfi_ifhead, &pfi_ifs); p; p = nextp) { 744 nextp = RB_NEXT(pfi_ifhead, &pfi_ifs, p); 745 if (pfi_skip_if(name, p)) 746 continue; 747 if (*size > n++) { 748 if (!p->pfik_tzero) 749 p->pfik_tzero = time_second; 750 pfi_kif_ref(p, PFI_KIF_REF_RULE); 751 if (copyout(p, buf++, sizeof(*buf))) { 752 pfi_kif_unref(p, PFI_KIF_REF_RULE); 753 splx(s); 754 return (EFAULT); 755 } 756 nextp = RB_NEXT(pfi_ifhead, &pfi_ifs, p); 757 pfi_kif_unref(p, PFI_KIF_REF_RULE); 758 } 759 } 760 splx(s); 761 *size = n; 762 return (0); 763 } 764 765 int 766 pfi_skip_if(const char *filter, struct pfi_kif *p) 767 { 768 int n; 769 770 if (filter == NULL || !*filter) 771 return (0); 772 if (!strcmp(p->pfik_name, filter)) 773 return (0); /* exact match */ 774 n = strlen(filter); 775 if (n < 1 || n >= IFNAMSIZ) 776 return (1); /* sanity check */ 777 if (filter[n-1] >= '0' && filter[n-1] <= '9') 778 return (1); /* only do exact match in that case */ 779 if (strncmp(p->pfik_name, filter, n)) 780 return (1); /* prefix doesn't match */ 781 return (p->pfik_name[n] < '0' || p->pfik_name[n] > '9'); 782 } 783 784 int 785 pfi_set_flags(const char *name, int flags) 786 { 787 struct pfi_kif *p; 788 int s; 789 790 s = splsoftnet(); 791 RB_FOREACH(p, pfi_ifhead, &pfi_ifs) { 792 if (pfi_skip_if(name, p)) 793 continue; 794 p->pfik_flags |= flags; 795 } 796 splx(s); 797 return (0); 798 } 799 800 int 801 pfi_clear_flags(const char *name, int flags) 802 { 803 struct pfi_kif *p; 804 int s; 805 806 s = splsoftnet(); 807 RB_FOREACH(p, pfi_ifhead, &pfi_ifs) { 808 if (pfi_skip_if(name, p)) 809 continue; 810 p->pfik_flags &= ~flags; 811 } 812 splx(s); 813 return (0); 814 } 815 816 /* from pf_print_state.c */ 817 int 818 pfi_unmask(void *addr) 819 { 820 struct pf_addr *m = addr; 821 int i = 31, j = 0, b = 0; 822 u_int32_t tmp; 823 824 while (j < 4 && m->addr32[j] == 0xffffffff) { 825 b += 32; 826 j++; 827 } 828 if (j < 4) { 829 tmp = ntohl(m->addr32[j]); 830 for (i = 31; tmp & (1 << i); --i) 831 b++; 832 } 833 return (b); 834 } 835 836 #ifdef __NetBSD__ 837 static void 838 pfi_copy_group(char *dest, const char *src, ssize_t sz) 839 { 840 while (sz > 1 && *src && !(*src >= '0' && *src <= '9')) { 841 *dest++ = *src++; 842 sz--; 843 } 844 if (sz > 0) 845 *dest++ = '\0'; 846 } 847 848 void 849 pfi_init_groups(struct ifnet *ifp) 850 { 851 char group[IFNAMSIZ]; 852 853 if_init_groups(ifp); 854 if_addgroup(ifp, IFG_ALL); 855 856 pfi_copy_group(group, ifp->if_xname, sizeof(group)); 857 if_addgroup(ifp, group); 858 } 859 860 void 861 pfi_destroy_groups(struct ifnet *ifp) 862 { 863 char group[IFNAMSIZ]; 864 865 pfi_copy_group(group, ifp->if_xname, sizeof(group)); 866 if_delgroup(ifp, group); 867 868 if_delgroup(ifp, IFG_ALL); 869 if_destroy_groups(ifp); 870 } 871 872 int 873 pfil_ifnet_wrapper(void *arg, struct mbuf **mp, struct ifnet *ifp, int dir) 874 { 875 u_long cmd = (u_long)mp; 876 877 switch (cmd) { 878 case PFIL_IFNET_ATTACH: 879 pfi_init_groups(ifp); 880 881 pfi_attach_ifnet(ifp); 882 break; 883 case PFIL_IFNET_DETACH: 884 pfi_detach_ifnet(ifp); 885 886 pfi_destroy_groups(ifp); 887 break; 888 default: 889 panic("pfil_ifnet_wrapper: unexpected cmd %lu", cmd); 890 } 891 892 return (0); 893 } 894 895 int 896 pfil_ifaddr_wrapper(void *arg, struct mbuf **mp, struct ifnet *ifp, int dir) 897 { 898 u_long cmd = (u_long)mp; 899 900 switch (cmd) { 901 case SIOCSIFADDR: 902 case SIOCAIFADDR: 903 case SIOCDIFADDR: 904 #ifdef INET6 905 case SIOCAIFADDR_IN6: 906 case SIOCDIFADDR_IN6: 907 #endif /* INET6 */ 908 pfi_kifaddr_update(ifp->if_pf_kif); 909 break; 910 default: 911 panic("pfil_ifaddr_wrapper: unexpected ioctl %lu", cmd); 912 } 913 914 return (0); 915 } 916 #endif /* __NetBSD__ */ 917
Indexes created Fri Sep 26 20:09:58 GMT 2025