pf_if.c revision 1.15.8.2
1 /* $NetBSD: pf_if.c,v 1.15.8.2 2008/04/20 21:08:27 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 1.15.8.2 2008/04/20 21:08:27 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 { 145 146 pfil_remove_hook(pfil_ifaddr_wrapper, NULL, PFIL_IFADDR, &if_pfil); 147 pfil_remove_hook(pfil_ifnet_wrapper, NULL, PFIL_IFNET, &if_pfil); 148 149 for (i = 0; i < if_indexlim; i++) { 150 struct ifnet *ifp = ifindex2ifnet[i]; 151 152 if (ifp != NULL) { 153 pfi_detach_ifnet(ifp); 154 155 pfi_destroy_groups(ifp); 156 } 157 } 158 159 pool_destroy(&pfi_addr_pl); 160 161 free(pfi_buffer, PFI_MTYPE); 162 } 163 #endif /* _LKM */ 164 165 struct pfi_kif * 166 pfi_kif_get(const char *kif_name) 167 { 168 struct pfi_kif *kif; 169 struct pfi_kif_cmp s; 170 171 bzero(&s, sizeof(s)); 172 strlcpy(s.pfik_name, kif_name, sizeof(s.pfik_name)); 173 if ((kif = RB_FIND(pfi_ifhead, &pfi_ifs, (struct pfi_kif *)&s)) != NULL) 174 return (kif); 175 176 /* create new one */ 177 if ((kif = malloc(sizeof(*kif), PFI_MTYPE, M_DONTWAIT)) == NULL) 178 return (NULL); 179 180 bzero(kif, sizeof(*kif)); 181 strlcpy(kif->pfik_name, kif_name, sizeof(kif->pfik_name)); 182 #ifdef __NetBSD__ 183 /* time_second is not valid yet */ 184 kif->pfik_tzero = (time_second > 7200) ? time_second : 0; 185 #else 186 kif->pfik_tzero = time_second; 187 #endif /* !__NetBSD__ */ 188 TAILQ_INIT(&kif->pfik_dynaddrs); 189 190 RB_INSERT(pfi_ifhead, &pfi_ifs, kif); 191 return (kif); 192 } 193 194 void 195 pfi_kif_ref(struct pfi_kif *kif, enum pfi_kif_refs what) 196 { 197 switch (what) { 198 case PFI_KIF_REF_RULE: 199 kif->pfik_rules++; 200 break; 201 case PFI_KIF_REF_STATE: 202 kif->pfik_states++; 203 break; 204 default: 205 panic("pfi_kif_ref with unknown type"); 206 } 207 } 208 209 void 210 pfi_kif_unref(struct pfi_kif *kif, enum pfi_kif_refs what) 211 { 212 if (kif == NULL) 213 return; 214 215 switch (what) { 216 case PFI_KIF_REF_NONE: 217 break; 218 case PFI_KIF_REF_RULE: 219 if (kif->pfik_rules <= 0) { 220 printf("pfi_kif_unref: rules refcount <= 0\n"); 221 return; 222 } 223 kif->pfik_rules--; 224 break; 225 case PFI_KIF_REF_STATE: 226 if (kif->pfik_states <= 0) { 227 printf("pfi_kif_unref: state refcount <= 0\n"); 228 return; 229 } 230 kif->pfik_states--; 231 break; 232 default: 233 panic("pfi_kif_unref with unknown type"); 234 } 235 236 if (kif->pfik_ifp != NULL || kif->pfik_group != NULL || kif == pfi_all) 237 return; 238 239 if (kif->pfik_rules || kif->pfik_states) 240 return; 241 242 RB_REMOVE(pfi_ifhead, &pfi_ifs, kif); 243 free(kif, PFI_MTYPE); 244 } 245 246 int 247 pfi_kif_match(struct pfi_kif *rule_kif, struct pfi_kif *packet_kif) 248 { 249 struct ifg_list *p; 250 251 if (rule_kif == NULL || rule_kif == packet_kif) 252 return (1); 253 254 if (rule_kif->pfik_group != NULL) { 255 struct ifg_list_head *ifgh = 256 if_get_groups(packet_kif->pfik_ifp); 257 258 TAILQ_FOREACH(p, ifgh, ifgl_next) 259 if (p->ifgl_group == rule_kif->pfik_group) 260 return (1); 261 } 262 263 return (0); 264 } 265 266 void 267 pfi_attach_ifnet(struct ifnet *ifp) 268 { 269 struct pfi_kif *kif; 270 int s; 271 272 pfi_initialize(); 273 s = splsoftnet(); 274 pfi_update++; 275 if ((kif = pfi_kif_get(ifp->if_xname)) == NULL) 276 panic("pfi_kif_get failed"); 277 278 kif->pfik_ifp = ifp; 279 ifp->if_pf_kif = kif; 280 281 #ifndef __NetBSD__ 282 if ((kif->pfik_ah_cookie = hook_establish(ifp->if_addrhooks, 1, 283 pfi_kifaddr_update, kif)) == NULL) 284 panic("pfi_attach_ifnet: cannot allocate '%s' address hook", 285 ifp->if_xname); 286 #endif /* !__NetBSD__ */ 287 288 pfi_kif_update(kif); 289 290 splx(s); 291 } 292 293 void 294 pfi_detach_ifnet(struct ifnet *ifp) 295 { 296 int s; 297 struct pfi_kif *kif; 298 299 if ((kif = (struct pfi_kif *)ifp->if_pf_kif) == NULL) 300 return; 301 302 s = splsoftnet(); 303 pfi_update++; 304 #ifndef __NetBSD__ 305 hook_disestablish(ifp->if_addrhooks, kif->pfik_ah_cookie); 306 #endif /* !__NetBSD__ */ 307 pfi_kif_update(kif); 308 309 kif->pfik_ifp = NULL; 310 ifp->if_pf_kif = NULL; 311 pfi_kif_unref(kif, PFI_KIF_REF_NONE); 312 splx(s); 313 } 314 315 void 316 pfi_attach_ifgroup(struct ifg_group *ifg) 317 { 318 struct pfi_kif *kif; 319 int s; 320 321 pfi_initialize(); 322 s = splsoftnet(); 323 pfi_update++; 324 if ((kif = pfi_kif_get(ifg->ifg_group)) == NULL) 325 panic("pfi_kif_get failed"); 326 327 kif->pfik_group = ifg; 328 ifg->ifg_pf_kif = kif; 329 330 splx(s); 331 } 332 333 void 334 pfi_detach_ifgroup(struct ifg_group *ifg) 335 { 336 int s; 337 struct pfi_kif *kif; 338 339 if ((kif = (struct pfi_kif *)ifg->ifg_pf_kif) == NULL) 340 return; 341 342 s = splsoftnet(); 343 pfi_update++; 344 345 kif->pfik_group = NULL; 346 ifg->ifg_pf_kif = NULL; 347 pfi_kif_unref(kif, PFI_KIF_REF_NONE); 348 splx(s); 349 } 350 351 void 352 pfi_group_change(const char *group) 353 { 354 struct pfi_kif *kif; 355 int s; 356 357 s = splsoftnet(); 358 pfi_update++; 359 if ((kif = pfi_kif_get(group)) == NULL) 360 panic("pfi_kif_get failed"); 361 362 pfi_kif_update(kif); 363 364 splx(s); 365 } 366 367 int 368 pfi_match_addr(struct pfi_dynaddr *dyn, struct pf_addr *a, sa_family_t af) 369 { 370 switch (af) { 371 #ifdef INET 372 case AF_INET: 373 switch (dyn->pfid_acnt4) { 374 case 0: 375 return (0); 376 case 1: 377 return (PF_MATCHA(0, &dyn->pfid_addr4, 378 &dyn->pfid_mask4, a, AF_INET)); 379 default: 380 return (pfr_match_addr(dyn->pfid_kt, a, AF_INET)); 381 } 382 break; 383 #endif /* INET */ 384 #ifdef INET6 385 case AF_INET6: 386 switch (dyn->pfid_acnt6) { 387 case 0: 388 return (0); 389 case 1: 390 return (PF_MATCHA(0, &dyn->pfid_addr6, 391 &dyn->pfid_mask6, a, AF_INET6)); 392 default: 393 return (pfr_match_addr(dyn->pfid_kt, a, AF_INET6)); 394 } 395 break; 396 #endif /* INET6 */ 397 default: 398 return (0); 399 } 400 } 401 402 int 403 pfi_dynaddr_setup(struct pf_addr_wrap *aw, sa_family_t af) 404 { 405 struct pfi_dynaddr *dyn; 406 char tblname[PF_TABLE_NAME_SIZE]; 407 struct pf_ruleset *ruleset = NULL; 408 int s, rv = 0; 409 410 if (aw->type != PF_ADDR_DYNIFTL) 411 return (0); 412 if ((dyn = pool_get(&pfi_addr_pl, PR_NOWAIT)) == NULL) 413 return (1); 414 bzero(dyn, sizeof(*dyn)); 415 416 s = splsoftnet(); 417 if (!strcmp(aw->v.ifname, "self")) 418 dyn->pfid_kif = pfi_kif_get(IFG_ALL); 419 else 420 dyn->pfid_kif = pfi_kif_get(aw->v.ifname); 421 if (dyn->pfid_kif == NULL) { 422 rv = 1; 423 goto _bad; 424 } 425 pfi_kif_ref(dyn->pfid_kif, PFI_KIF_REF_RULE); 426 427 dyn->pfid_net = pfi_unmask(&aw->v.a.mask); 428 if (af == AF_INET && dyn->pfid_net == 32) 429 dyn->pfid_net = 128; 430 strlcpy(tblname, aw->v.ifname, sizeof(tblname)); 431 if (aw->iflags & PFI_AFLAG_NETWORK) 432 strlcat(tblname, ":network", sizeof(tblname)); 433 if (aw->iflags & PFI_AFLAG_BROADCAST) 434 strlcat(tblname, ":broadcast", sizeof(tblname)); 435 if (aw->iflags & PFI_AFLAG_PEER) 436 strlcat(tblname, ":peer", sizeof(tblname)); 437 if (aw->iflags & PFI_AFLAG_NOALIAS) 438 strlcat(tblname, ":0", sizeof(tblname)); 439 if (dyn->pfid_net != 128) 440 snprintf(tblname + strlen(tblname), 441 sizeof(tblname) - strlen(tblname), "/%d", dyn->pfid_net); 442 if ((ruleset = pf_find_or_create_ruleset(PF_RESERVED_ANCHOR)) == NULL) { 443 rv = 1; 444 goto _bad; 445 } 446 447 if ((dyn->pfid_kt = pfr_attach_table(ruleset, tblname)) == NULL) { 448 rv = 1; 449 goto _bad; 450 } 451 452 dyn->pfid_kt->pfrkt_flags |= PFR_TFLAG_ACTIVE; 453 dyn->pfid_iflags = aw->iflags; 454 dyn->pfid_af = af; 455 456 TAILQ_INSERT_TAIL(&dyn->pfid_kif->pfik_dynaddrs, dyn, entry); 457 aw->p.dyn = dyn; 458 pfi_kif_update(dyn->pfid_kif); 459 splx(s); 460 return (0); 461 462 _bad: 463 if (dyn->pfid_kt != NULL) 464 pfr_detach_table(dyn->pfid_kt); 465 if (ruleset != NULL) 466 pf_remove_if_empty_ruleset(ruleset); 467 if (dyn->pfid_kif != NULL) 468 pfi_kif_unref(dyn->pfid_kif, PFI_KIF_REF_RULE); 469 pool_put(&pfi_addr_pl, dyn); 470 splx(s); 471 return (rv); 472 } 473 474 void 475 pfi_kif_update(struct pfi_kif *kif) 476 { 477 struct ifg_list *ifgl; 478 struct pfi_dynaddr *p; 479 480 /* update all dynaddr */ 481 TAILQ_FOREACH(p, &kif->pfik_dynaddrs, entry) 482 pfi_dynaddr_update(p); 483 484 /* again for all groups kif is member of */ 485 if (kif->pfik_ifp != NULL) { 486 struct ifg_list_head *ifgh = if_get_groups(kif->pfik_ifp); 487 488 TAILQ_FOREACH(ifgl, ifgh, ifgl_next) 489 pfi_kif_update((struct pfi_kif *) 490 ifgl->ifgl_group->ifg_pf_kif); 491 } 492 } 493 494 void 495 pfi_dynaddr_update(struct pfi_dynaddr *dyn) 496 { 497 struct pfi_kif *kif; 498 struct pfr_ktable *kt; 499 500 if (dyn == NULL || dyn->pfid_kif == NULL || dyn->pfid_kt == NULL) 501 panic("pfi_dynaddr_update"); 502 503 kif = dyn->pfid_kif; 504 kt = dyn->pfid_kt; 505 506 if (kt->pfrkt_larg != pfi_update) { 507 /* this table needs to be brought up-to-date */ 508 pfi_table_update(kt, kif, dyn->pfid_net, dyn->pfid_iflags); 509 kt->pfrkt_larg = pfi_update; 510 } 511 pfr_dynaddr_update(kt, dyn); 512 } 513 514 void 515 pfi_table_update(struct pfr_ktable *kt, struct pfi_kif *kif, int net, int flags) 516 { 517 int e, size2 = 0; 518 struct ifg_member *ifgm; 519 520 pfi_buffer_cnt = 0; 521 522 if (kif->pfik_ifp != NULL) 523 pfi_instance_add(kif->pfik_ifp, net, flags); 524 else if (kif->pfik_group != NULL) 525 TAILQ_FOREACH(ifgm, &kif->pfik_group->ifg_members, ifgm_next) 526 pfi_instance_add(ifgm->ifgm_ifp, net, flags); 527 528 if ((e = pfr_set_addrs(&kt->pfrkt_t, pfi_buffer, pfi_buffer_cnt, &size2, 529 NULL, NULL, NULL, 0, PFR_TFLAG_ALLMASK))) 530 printf("pfi_table_update: cannot set %d new addresses " 531 "into table %s: %d\n", pfi_buffer_cnt, kt->pfrkt_name, e); 532 } 533 534 void 535 pfi_instance_add(struct ifnet *ifp, int net, int flags) 536 { 537 struct ifaddr *ia; 538 int got4 = 0, got6 = 0; 539 int net2, af; 540 541 if (ifp == NULL) 542 return; 543 IFADDR_FOREACH(ia, ifp) { 544 if (ia->ifa_addr == NULL) 545 continue; 546 af = ia->ifa_addr->sa_family; 547 if (af != AF_INET && af != AF_INET6) 548 continue; 549 if ((flags & PFI_AFLAG_BROADCAST) && af == AF_INET6) 550 continue; 551 if ((flags & PFI_AFLAG_BROADCAST) && 552 !(ifp->if_flags & IFF_BROADCAST)) 553 continue; 554 if ((flags & PFI_AFLAG_PEER) && 555 !(ifp->if_flags & IFF_POINTOPOINT)) 556 continue; 557 if ((flags & PFI_AFLAG_NETWORK) && af == AF_INET6 && 558 IN6_IS_ADDR_LINKLOCAL( 559 &((struct sockaddr_in6 *)ia->ifa_addr)->sin6_addr)) 560 continue; 561 if (flags & PFI_AFLAG_NOALIAS) { 562 if (af == AF_INET && got4) 563 continue; 564 if (af == AF_INET6 && got6) 565 continue; 566 } 567 if (af == AF_INET) 568 got4 = 1; 569 else if (af == AF_INET6) 570 got6 = 1; 571 net2 = net; 572 if (net2 == 128 && (flags & PFI_AFLAG_NETWORK)) { 573 if (af == AF_INET) 574 net2 = pfi_unmask(&((struct sockaddr_in *) 575 ia->ifa_netmask)->sin_addr); 576 else if (af == AF_INET6) 577 net2 = pfi_unmask(&((struct sockaddr_in6 *) 578 ia->ifa_netmask)->sin6_addr); 579 } 580 if (af == AF_INET && net2 > 32) 581 net2 = 32; 582 if (flags & PFI_AFLAG_BROADCAST) 583 pfi_address_add(ia->ifa_broadaddr, af, net2); 584 else if (flags & PFI_AFLAG_PEER) 585 pfi_address_add(ia->ifa_dstaddr, af, net2); 586 else 587 pfi_address_add(ia->ifa_addr, af, net2); 588 } 589 } 590 591 void 592 pfi_address_add(struct sockaddr *sa, int af, int net) 593 { 594 struct pfr_addr *p; 595 int i; 596 597 if (pfi_buffer_cnt >= pfi_buffer_max) { 598 int new_max = pfi_buffer_max * 2; 599 600 if (new_max > PFI_BUFFER_MAX) { 601 printf("pfi_address_add: address buffer full (%d/%d)\n", 602 pfi_buffer_cnt, PFI_BUFFER_MAX); 603 return; 604 } 605 p = malloc(new_max * sizeof(*pfi_buffer), PFI_MTYPE, 606 M_DONTWAIT); 607 if (p == NULL) { 608 printf("pfi_address_add: no memory to grow buffer " 609 "(%d/%d)\n", pfi_buffer_cnt, PFI_BUFFER_MAX); 610 return; 611 } 612 memcpy(pfi_buffer, p, pfi_buffer_cnt * sizeof(*pfi_buffer)); 613 /* no need to zero buffer */ 614 free(pfi_buffer, PFI_MTYPE); 615 pfi_buffer = p; 616 pfi_buffer_max = new_max; 617 } 618 if (af == AF_INET && net > 32) 619 net = 128; 620 p = pfi_buffer + pfi_buffer_cnt++; 621 bzero(p, sizeof(*p)); 622 p->pfra_af = af; 623 p->pfra_net = net; 624 if (af == AF_INET) 625 p->pfra_ip4addr = ((struct sockaddr_in *)sa)->sin_addr; 626 else if (af == AF_INET6) { 627 p->pfra_ip6addr = ((struct sockaddr_in6 *)sa)->sin6_addr; 628 if (IN6_IS_SCOPE_EMBEDDABLE(&p->pfra_ip6addr)) 629 p->pfra_ip6addr.s6_addr16[1] = 0; 630 } 631 /* mask network address bits */ 632 if (net < 128) 633 ((char *)p)[p->pfra_net/8] &= ~(0xFF >> (p->pfra_net%8)); 634 for (i = (p->pfra_net+7)/8; i < sizeof(p->pfra_u); i++) 635 ((char *)p)[i] = 0; 636 } 637 638 void 639 pfi_dynaddr_remove(struct pf_addr_wrap *aw) 640 { 641 int s; 642 643 if (aw->type != PF_ADDR_DYNIFTL || aw->p.dyn == NULL || 644 aw->p.dyn->pfid_kif == NULL || aw->p.dyn->pfid_kt == NULL) 645 return; 646 647 s = splsoftnet(); 648 TAILQ_REMOVE(&aw->p.dyn->pfid_kif->pfik_dynaddrs, aw->p.dyn, entry); 649 pfi_kif_unref(aw->p.dyn->pfid_kif, PFI_KIF_REF_RULE); 650 aw->p.dyn->pfid_kif = NULL; 651 pfr_detach_table(aw->p.dyn->pfid_kt); 652 aw->p.dyn->pfid_kt = NULL; 653 pool_put(&pfi_addr_pl, aw->p.dyn); 654 aw->p.dyn = NULL; 655 splx(s); 656 } 657 658 void 659 pfi_dynaddr_copyout(struct pf_addr_wrap *aw) 660 { 661 if (aw->type != PF_ADDR_DYNIFTL || aw->p.dyn == NULL || 662 aw->p.dyn->pfid_kif == NULL) 663 return; 664 aw->p.dyncnt = aw->p.dyn->pfid_acnt4 + aw->p.dyn->pfid_acnt6; 665 } 666 667 void 668 pfi_kifaddr_update(void *v) 669 { 670 int s; 671 struct pfi_kif *kif = (struct pfi_kif *)v; 672 673 s = splsoftnet(); 674 pfi_update++; 675 pfi_kif_update(kif); 676 splx(s); 677 } 678 679 int 680 pfi_if_compare(struct pfi_kif *p, struct pfi_kif *q) 681 { 682 return (strncmp(p->pfik_name, q->pfik_name, IFNAMSIZ)); 683 } 684 685 void 686 pfi_fill_oldstatus(struct pf_status *pfs) 687 { 688 struct pfi_kif *p; 689 struct pfi_kif_cmp key; 690 int i, j, k, s; 691 692 strlcpy(key.pfik_name, pfs->ifname, sizeof(key.pfik_name)); 693 s = splsoftnet(); 694 p = RB_FIND(pfi_ifhead, &pfi_ifs, (struct pfi_kif *)&key); 695 if (p == NULL) { 696 splx(s); 697 return; 698 } 699 bzero(pfs->pcounters, sizeof(pfs->pcounters)); 700 bzero(pfs->bcounters, sizeof(pfs->bcounters)); 701 for (i = 0; i < 2; i++) 702 for (j = 0; j < 2; j++) 703 for (k = 0; k < 2; k++) { 704 pfs->pcounters[i][j][k] = 705 p->pfik_packets[i][j][k]; 706 pfs->bcounters[i][j] += 707 p->pfik_bytes[i][j][k]; 708 } 709 splx(s); 710 } 711 712 int 713 pfi_clr_istats(const char *name) 714 { 715 struct pfi_kif *p; 716 int s; 717 718 s = splsoftnet(); 719 RB_FOREACH(p, pfi_ifhead, &pfi_ifs) { 720 if (pfi_skip_if(name, p)) 721 continue; 722 bzero(p->pfik_packets, sizeof(p->pfik_packets)); 723 bzero(p->pfik_bytes, sizeof(p->pfik_bytes)); 724 p->pfik_tzero = time_second; 725 } 726 splx(s); 727 728 return (0); 729 } 730 731 int 732 pfi_get_ifaces(const char *name, struct pfi_kif *buf, int *size) 733 { 734 struct pfi_kif *p, *nextp; 735 int s, n = 0; 736 737 s = splsoftnet(); 738 for (p = RB_MIN(pfi_ifhead, &pfi_ifs); p; p = nextp) { 739 nextp = RB_NEXT(pfi_ifhead, &pfi_ifs, p); 740 if (pfi_skip_if(name, p)) 741 continue; 742 if (*size > n++) { 743 if (!p->pfik_tzero) 744 p->pfik_tzero = time_second; 745 pfi_kif_ref(p, PFI_KIF_REF_RULE); 746 if (copyout(p, buf++, sizeof(*buf))) { 747 pfi_kif_unref(p, PFI_KIF_REF_RULE); 748 splx(s); 749 return (EFAULT); 750 } 751 nextp = RB_NEXT(pfi_ifhead, &pfi_ifs, p); 752 pfi_kif_unref(p, PFI_KIF_REF_RULE); 753 } 754 } 755 splx(s); 756 *size = n; 757 return (0); 758 } 759 760 int 761 pfi_skip_if(const char *filter, struct pfi_kif *p) 762 { 763 int n; 764 765 if (filter == NULL || !*filter) 766 return (0); 767 if (!strcmp(p->pfik_name, filter)) 768 return (0); /* exact match */ 769 n = strlen(filter); 770 if (n < 1 || n >= IFNAMSIZ) 771 return (1); /* sanity check */ 772 if (filter[n-1] >= '0' && filter[n-1] <= '9') 773 return (1); /* only do exact match in that case */ 774 if (strncmp(p->pfik_name, filter, n)) 775 return (1); /* prefix doesn't match */ 776 return (p->pfik_name[n] < '0' || p->pfik_name[n] > '9'); 777 } 778 779 int 780 pfi_set_flags(const char *name, int flags) 781 { 782 struct pfi_kif *p; 783 int s; 784 785 s = splsoftnet(); 786 RB_FOREACH(p, pfi_ifhead, &pfi_ifs) { 787 if (pfi_skip_if(name, p)) 788 continue; 789 p->pfik_flags |= flags; 790 } 791 splx(s); 792 return (0); 793 } 794 795 int 796 pfi_clear_flags(const char *name, int flags) 797 { 798 struct pfi_kif *p; 799 int s; 800 801 s = splsoftnet(); 802 RB_FOREACH(p, pfi_ifhead, &pfi_ifs) { 803 if (pfi_skip_if(name, p)) 804 continue; 805 p->pfik_flags &= ~flags; 806 } 807 splx(s); 808 return (0); 809 } 810 811 /* from pf_print_state.c */ 812 int 813 pfi_unmask(void *addr) 814 { 815 struct pf_addr *m = addr; 816 int i = 31, j = 0, b = 0; 817 u_int32_t tmp; 818 819 while (j < 4 && m->addr32[j] == 0xffffffff) { 820 b += 32; 821 j++; 822 } 823 if (j < 4) { 824 tmp = ntohl(m->addr32[j]); 825 for (i = 31; tmp & (1 << i); --i) 826 b++; 827 } 828 return (b); 829 } 830 831 #ifdef __NetBSD__ 832 static void 833 pfi_copy_group(char *dest, const char *src, ssize_t sz) 834 { 835 while (sz > 1 && *src && !(*src >= '0' && *src <= '9')) { 836 *dest++ = *src++; 837 sz--; 838 } 839 if (sz > 0) 840 *dest++ = '\0'; 841 } 842 843 void 844 pfi_init_groups(struct ifnet *ifp) 845 { 846 char group[IFNAMSIZ]; 847 848 if_init_groups(ifp); 849 if_addgroup(ifp, IFG_ALL); 850 851 pfi_copy_group(group, ifp->if_xname, sizeof(group)); 852 if_addgroup(ifp, group); 853 } 854 855 void 856 pfi_destroy_groups(struct ifnet *ifp) 857 { 858 char group[IFNAMSIZ]; 859 860 pfi_copy_group(group, ifp->if_xname, sizeof(group)); 861 if_delgroup(ifp, group); 862 863 if_delgroup(ifp, IFG_ALL); 864 if_destroy_groups(ifp); 865 } 866 867 int 868 pfil_ifnet_wrapper(void *arg, struct mbuf **mp, struct ifnet *ifp, int dir) 869 { 870 u_long cmd = (u_long)mp; 871 872 switch (cmd) { 873 case PFIL_IFNET_ATTACH: 874 pfi_init_groups(ifp); 875 876 pfi_attach_ifnet(ifp); 877 break; 878 case PFIL_IFNET_DETACH: 879 pfi_detach_ifnet(ifp); 880 881 pfi_destroy_groups(ifp); 882 break; 883 default: 884 panic("pfil_ifnet_wrapper: unexpected cmd %lu", cmd); 885 } 886 887 return (0); 888 } 889 890 int 891 pfil_ifaddr_wrapper(void *arg, struct mbuf **mp, struct ifnet *ifp, int dir) 892 { 893 u_long cmd = (u_long)mp; 894 895 switch (cmd) { 896 case SIOCSIFADDR: 897 case SIOCAIFADDR: 898 case SIOCDIFADDR: 899 #ifdef INET6 900 case SIOCAIFADDR_IN6: 901 case SIOCDIFADDR_IN6: 902 #endif /* INET6 */ 903 pfi_kifaddr_update(ifp->if_pf_kif); 904 break; 905 default: 906 panic("pfil_ifaddr_wrapper: unexpected ioctl %lu", cmd); 907 } 908 909 return (0); 910 } 911 #endif /* __NetBSD__ */ 912
Indexes created Sun Oct 12 22:09:51 GMT 2025