pf_if.c revision 1.21.22.1
1 /* $NetBSD: pf_if.c,v 1.21.22.1 2013/07/17 03:16:31 rmind 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 1.21.22.1 2013/07/17 03:16:31 rmind 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 if (pfi_all != NULL) /* already initialized */ 105 return; 106 107 #ifdef __NetBSD__ 108 pool_init(&pfi_addr_pl, sizeof(struct pfi_dynaddr), 0, 0, 0, 109 "pfiaddrpl", &pool_allocator_nointr, IPL_NONE); 110 #else 111 pool_init(&pfi_addr_pl, sizeof(struct pfi_dynaddr), 0, 0, 0, 112 "pfiaddrpl", &pool_allocator_nointr); 113 #endif /* !__NetBSD__ */ 114 pfi_buffer_max = 64; 115 pfi_buffer = malloc(pfi_buffer_max * sizeof(*pfi_buffer), 116 PFI_MTYPE, M_WAITOK); 117 118 if ((pfi_all = pfi_kif_get(IFG_ALL)) == NULL) 119 panic("pfi_kif_get for pfi_all failed"); 120 121 #ifdef __NetBSD__ 122 ifnet_t *ifp; 123 IFNET_FOREACH(ifp) { 124 pfi_init_groups(ifp); 125 pfi_attach_ifnet(ifp); 126 } 127 128 pfil_add_hook(pfil_ifnet_wrapper, NULL, PFIL_IFNET, &if_pfil); 129 pfil_add_hook(pfil_ifaddr_wrapper, NULL, PFIL_IFADDR, &if_pfil); 130 #endif /* __NetBSD__ */ 131 } 132 133 #ifdef _MODULE 134 void 135 pfi_destroy(void) 136 { 137 struct pfi_kif *p; 138 int i; 139 140 pfil_remove_hook(pfil_ifaddr_wrapper, NULL, PFIL_IFADDR, &if_pfil); 141 pfil_remove_hook(pfil_ifnet_wrapper, NULL, PFIL_IFNET, &if_pfil); 142 143 ifnet_t *ifp; 144 IFNET_FOREACH(ifp) { 145 if ((ifp = if_byindex(i)) != NULL) { 146 pfi_detach_ifnet(ifp); 147 pfi_destroy_groups(ifp); 148 } 149 } 150 151 while ((p = RB_MIN(pfi_ifhead, &pfi_ifs))) { 152 RB_REMOVE(pfi_ifhead, &pfi_ifs, p); 153 free(p, PFI_MTYPE); 154 } 155 156 pool_destroy(&pfi_addr_pl); 157 158 free(pfi_buffer, PFI_MTYPE); 159 } 160 #endif /* _MODULE */ 161 162 struct pfi_kif * 163 pfi_kif_get(const char *kif_name) 164 { 165 struct pfi_kif *kif; 166 struct pfi_kif_cmp s; 167 168 bzero(&s, sizeof(s)); 169 strlcpy(s.pfik_name, kif_name, sizeof(s.pfik_name)); 170 if ((kif = RB_FIND(pfi_ifhead, &pfi_ifs, (struct pfi_kif *)&s)) != NULL) 171 return (kif); 172 173 /* create new one */ 174 if ((kif = malloc(sizeof(*kif), PFI_MTYPE, M_NOWAIT|M_ZERO)) == NULL) 175 return (NULL); 176 177 strlcpy(kif->pfik_name, kif_name, sizeof(kif->pfik_name)); 178 #ifdef __NetBSD__ 179 /* time_second is not valid yet */ 180 kif->pfik_tzero = (time_second > 7200) ? time_second : 0; 181 #else 182 kif->pfik_tzero = time_second; 183 #endif /* !__NetBSD__ */ 184 TAILQ_INIT(&kif->pfik_dynaddrs); 185 186 RB_INSERT(pfi_ifhead, &pfi_ifs, kif); 187 return (kif); 188 } 189 190 void 191 pfi_kif_ref(struct pfi_kif *kif, enum pfi_kif_refs what) 192 { 193 switch (what) { 194 case PFI_KIF_REF_RULE: 195 kif->pfik_rules++; 196 break; 197 case PFI_KIF_REF_STATE: 198 kif->pfik_states++; 199 break; 200 default: 201 panic("pfi_kif_ref with unknown type"); 202 } 203 } 204 205 void 206 pfi_kif_unref(struct pfi_kif *kif, enum pfi_kif_refs what) 207 { 208 if (kif == NULL) 209 return; 210 211 switch (what) { 212 case PFI_KIF_REF_NONE: 213 break; 214 case PFI_KIF_REF_RULE: 215 if (kif->pfik_rules <= 0) { 216 printf("pfi_kif_unref: rules refcount <= 0\n"); 217 return; 218 } 219 kif->pfik_rules--; 220 break; 221 case PFI_KIF_REF_STATE: 222 if (kif->pfik_states <= 0) { 223 printf("pfi_kif_unref: state refcount <= 0\n"); 224 return; 225 } 226 kif->pfik_states--; 227 break; 228 default: 229 panic("pfi_kif_unref with unknown type"); 230 } 231 232 if (kif->pfik_ifp != NULL || kif->pfik_group != NULL || kif == pfi_all) 233 return; 234 235 if (kif->pfik_rules || kif->pfik_states) 236 return; 237 238 RB_REMOVE(pfi_ifhead, &pfi_ifs, kif); 239 free(kif, PFI_MTYPE); 240 } 241 242 int 243 pfi_kif_match(struct pfi_kif *rule_kif, struct pfi_kif *packet_kif) 244 { 245 struct ifg_list *p; 246 247 if (rule_kif == NULL || rule_kif == packet_kif) 248 return (1); 249 250 if (rule_kif->pfik_group != NULL) { 251 struct ifg_list_head *ifgh = 252 if_get_groups(packet_kif->pfik_ifp); 253 254 TAILQ_FOREACH(p, ifgh, ifgl_next) 255 if (p->ifgl_group == rule_kif->pfik_group) 256 return (1); 257 } 258 259 return (0); 260 } 261 262 void 263 pfi_attach_ifnet(struct ifnet *ifp) 264 { 265 struct pfi_kif *kif; 266 int s; 267 268 pfi_initialize(); 269 s = splsoftnet(); 270 pfi_update++; 271 if ((kif = pfi_kif_get(ifp->if_xname)) == NULL) 272 panic("pfi_kif_get failed"); 273 274 kif->pfik_ifp = ifp; 275 ifp->if_pf_kif = kif; 276 277 #ifndef __NetBSD__ 278 if ((kif->pfik_ah_cookie = hook_establish(ifp->if_addrhooks, 1, 279 pfi_kifaddr_update, kif)) == NULL) 280 panic("pfi_attach_ifnet: cannot allocate '%s' address hook", 281 ifp->if_xname); 282 #endif /* !__NetBSD__ */ 283 284 pfi_kif_update(kif); 285 286 splx(s); 287 } 288 289 void 290 pfi_detach_ifnet(struct ifnet *ifp) 291 { 292 int s; 293 struct pfi_kif *kif; 294 295 if ((kif = (struct pfi_kif *)ifp->if_pf_kif) == NULL) 296 return; 297 298 s = splsoftnet(); 299 pfi_update++; 300 #ifndef __NetBSD__ 301 hook_disestablish(ifp->if_addrhooks, kif->pfik_ah_cookie); 302 #endif /* !__NetBSD__ */ 303 pfi_kif_update(kif); 304 305 kif->pfik_ifp = NULL; 306 ifp->if_pf_kif = NULL; 307 pfi_kif_unref(kif, PFI_KIF_REF_NONE); 308 splx(s); 309 } 310 311 void 312 pfi_attach_ifgroup(struct ifg_group *ifg) 313 { 314 struct pfi_kif *kif; 315 int s; 316 317 pfi_initialize(); 318 s = splsoftnet(); 319 pfi_update++; 320 if ((kif = pfi_kif_get(ifg->ifg_group)) == NULL) 321 panic("pfi_kif_get failed"); 322 323 kif->pfik_group = ifg; 324 ifg->ifg_pf_kif = kif; 325 326 splx(s); 327 } 328 329 void 330 pfi_detach_ifgroup(struct ifg_group *ifg) 331 { 332 int s; 333 struct pfi_kif *kif; 334 335 if ((kif = (struct pfi_kif *)ifg->ifg_pf_kif) == NULL) 336 return; 337 338 s = splsoftnet(); 339 pfi_update++; 340 341 kif->pfik_group = NULL; 342 ifg->ifg_pf_kif = NULL; 343 pfi_kif_unref(kif, PFI_KIF_REF_NONE); 344 splx(s); 345 } 346 347 void 348 pfi_group_change(const char *group) 349 { 350 struct pfi_kif *kif; 351 int s; 352 353 s = splsoftnet(); 354 pfi_update++; 355 if ((kif = pfi_kif_get(group)) == NULL) 356 panic("pfi_kif_get failed"); 357 358 pfi_kif_update(kif); 359 360 splx(s); 361 } 362 363 int 364 pfi_match_addr(struct pfi_dynaddr *dyn, struct pf_addr *a, sa_family_t af) 365 { 366 switch (af) { 367 #ifdef INET 368 case AF_INET: 369 switch (dyn->pfid_acnt4) { 370 case 0: 371 return (0); 372 case 1: 373 return (PF_MATCHA(0, &dyn->pfid_addr4, 374 &dyn->pfid_mask4, a, AF_INET)); 375 default: 376 return (pfr_match_addr(dyn->pfid_kt, a, AF_INET)); 377 } 378 break; 379 #endif /* INET */ 380 #ifdef INET6 381 case AF_INET6: 382 switch (dyn->pfid_acnt6) { 383 case 0: 384 return (0); 385 case 1: 386 return (PF_MATCHA(0, &dyn->pfid_addr6, 387 &dyn->pfid_mask6, a, AF_INET6)); 388 default: 389 return (pfr_match_addr(dyn->pfid_kt, a, AF_INET6)); 390 } 391 break; 392 #endif /* INET6 */ 393 default: 394 return (0); 395 } 396 } 397 398 int 399 pfi_dynaddr_setup(struct pf_addr_wrap *aw, sa_family_t af) 400 { 401 struct pfi_dynaddr *dyn; 402 char tblname[PF_TABLE_NAME_SIZE]; 403 struct pf_ruleset *ruleset = NULL; 404 int s, rv = 0; 405 406 if (aw->type != PF_ADDR_DYNIFTL) 407 return (0); 408 if ((dyn = pool_get(&pfi_addr_pl, PR_NOWAIT)) == NULL) 409 return (1); 410 bzero(dyn, sizeof(*dyn)); 411 412 s = splsoftnet(); 413 if (!strcmp(aw->v.ifname, "self")) 414 dyn->pfid_kif = pfi_kif_get(IFG_ALL); 415 else 416 dyn->pfid_kif = pfi_kif_get(aw->v.ifname); 417 if (dyn->pfid_kif == NULL) { 418 rv = 1; 419 goto _bad; 420 } 421 pfi_kif_ref(dyn->pfid_kif, PFI_KIF_REF_RULE); 422 423 dyn->pfid_net = pfi_unmask(&aw->v.a.mask); 424 if (af == AF_INET && dyn->pfid_net == 32) 425 dyn->pfid_net = 128; 426 strlcpy(tblname, aw->v.ifname, sizeof(tblname)); 427 if (aw->iflags & PFI_AFLAG_NETWORK) 428 strlcat(tblname, ":network", sizeof(tblname)); 429 if (aw->iflags & PFI_AFLAG_BROADCAST) 430 strlcat(tblname, ":broadcast", sizeof(tblname)); 431 if (aw->iflags & PFI_AFLAG_PEER) 432 strlcat(tblname, ":peer", sizeof(tblname)); 433 if (aw->iflags & PFI_AFLAG_NOALIAS) 434 strlcat(tblname, ":0", sizeof(tblname)); 435 if (dyn->pfid_net != 128) 436 snprintf(tblname + strlen(tblname), 437 sizeof(tblname) - strlen(tblname), "/%d", dyn->pfid_net); 438 if ((ruleset = pf_find_or_create_ruleset(PF_RESERVED_ANCHOR)) == NULL) { 439 rv = 1; 440 goto _bad; 441 } 442 443 if ((dyn->pfid_kt = pfr_attach_table(ruleset, tblname)) == NULL) { 444 rv = 1; 445 goto _bad; 446 } 447 448 dyn->pfid_kt->pfrkt_flags |= PFR_TFLAG_ACTIVE; 449 dyn->pfid_iflags = aw->iflags; 450 dyn->pfid_af = af; 451 452 TAILQ_INSERT_TAIL(&dyn->pfid_kif->pfik_dynaddrs, dyn, entry); 453 aw->p.dyn = dyn; 454 pfi_kif_update(dyn->pfid_kif); 455 splx(s); 456 return (0); 457 458 _bad: 459 if (dyn->pfid_kt != NULL) 460 pfr_detach_table(dyn->pfid_kt); 461 if (ruleset != NULL) 462 pf_remove_if_empty_ruleset(ruleset); 463 if (dyn->pfid_kif != NULL) 464 pfi_kif_unref(dyn->pfid_kif, PFI_KIF_REF_RULE); 465 pool_put(&pfi_addr_pl, dyn); 466 splx(s); 467 return (rv); 468 } 469 470 void 471 pfi_kif_update(struct pfi_kif *kif) 472 { 473 struct ifg_list *ifgl; 474 struct pfi_dynaddr *p; 475 476 /* update all dynaddr */ 477 TAILQ_FOREACH(p, &kif->pfik_dynaddrs, entry) 478 pfi_dynaddr_update(p); 479 480 /* again for all groups kif is member of */ 481 if (kif->pfik_ifp != NULL) { 482 struct ifg_list_head *ifgh = if_get_groups(kif->pfik_ifp); 483 484 TAILQ_FOREACH(ifgl, ifgh, ifgl_next) 485 pfi_kif_update((struct pfi_kif *) 486 ifgl->ifgl_group->ifg_pf_kif); 487 } 488 } 489 490 void 491 pfi_dynaddr_update(struct pfi_dynaddr *dyn) 492 { 493 struct pfi_kif *kif; 494 struct pfr_ktable *kt; 495 496 if (dyn == NULL || dyn->pfid_kif == NULL || dyn->pfid_kt == NULL) 497 panic("pfi_dynaddr_update"); 498 499 kif = dyn->pfid_kif; 500 kt = dyn->pfid_kt; 501 502 if (kt->pfrkt_larg != pfi_update) { 503 /* this table needs to be brought up-to-date */ 504 pfi_table_update(kt, kif, dyn->pfid_net, dyn->pfid_iflags); 505 kt->pfrkt_larg = pfi_update; 506 } 507 pfr_dynaddr_update(kt, dyn); 508 } 509 510 void 511 pfi_table_update(struct pfr_ktable *kt, struct pfi_kif *kif, int net, int flags) 512 { 513 int e, size2 = 0; 514 struct ifg_member *ifgm; 515 516 pfi_buffer_cnt = 0; 517 518 if (kif->pfik_ifp != NULL) 519 pfi_instance_add(kif->pfik_ifp, net, flags); 520 else if (kif->pfik_group != NULL) 521 TAILQ_FOREACH(ifgm, &kif->pfik_group->ifg_members, ifgm_next) 522 pfi_instance_add(ifgm->ifgm_ifp, net, flags); 523 524 if ((e = pfr_set_addrs(&kt->pfrkt_t, pfi_buffer, pfi_buffer_cnt, &size2, 525 NULL, NULL, NULL, 0, PFR_TFLAG_ALLMASK))) 526 printf("pfi_table_update: cannot set %d new addresses " 527 "into table %s: %d\n", pfi_buffer_cnt, kt->pfrkt_name, e); 528 } 529 530 void 531 pfi_instance_add(struct ifnet *ifp, int net, int flags) 532 { 533 struct ifaddr *ia; 534 int got4 = 0, got6 = 0; 535 int net2, af; 536 537 if (ifp == NULL) 538 return; 539 IFADDR_FOREACH(ia, ifp) { 540 if (ia->ifa_addr == NULL) 541 continue; 542 af = ia->ifa_addr->sa_family; 543 if (af != AF_INET && af != AF_INET6) 544 continue; 545 if ((flags & PFI_AFLAG_BROADCAST) && af == AF_INET6) 546 continue; 547 if ((flags & PFI_AFLAG_BROADCAST) && 548 !(ifp->if_flags & IFF_BROADCAST)) 549 continue; 550 if ((flags & PFI_AFLAG_PEER) && 551 !(ifp->if_flags & IFF_POINTOPOINT)) 552 continue; 553 if ((flags & PFI_AFLAG_NETWORK) && af == AF_INET6 && 554 IN6_IS_ADDR_LINKLOCAL( 555 &((struct sockaddr_in6 *)ia->ifa_addr)->sin6_addr)) 556 continue; 557 if (flags & PFI_AFLAG_NOALIAS) { 558 if (af == AF_INET && got4) 559 continue; 560 if (af == AF_INET6 && got6) 561 continue; 562 } 563 if (af == AF_INET) 564 got4 = 1; 565 else if (af == AF_INET6) 566 got6 = 1; 567 net2 = net; 568 if (net2 == 128 && (flags & PFI_AFLAG_NETWORK)) { 569 if (af == AF_INET) 570 net2 = pfi_unmask(&((struct sockaddr_in *) 571 ia->ifa_netmask)->sin_addr); 572 else if (af == AF_INET6) 573 net2 = pfi_unmask(&((struct sockaddr_in6 *) 574 ia->ifa_netmask)->sin6_addr); 575 } 576 if (af == AF_INET && net2 > 32) 577 net2 = 32; 578 if (flags & PFI_AFLAG_BROADCAST) 579 pfi_address_add(ia->ifa_broadaddr, af, net2); 580 else if (flags & PFI_AFLAG_PEER) 581 pfi_address_add(ia->ifa_dstaddr, af, net2); 582 else 583 pfi_address_add(ia->ifa_addr, af, net2); 584 } 585 } 586 587 void 588 pfi_address_add(struct sockaddr *sa, int af, int net) 589 { 590 struct pfr_addr *p; 591 int i; 592 593 if (pfi_buffer_cnt >= pfi_buffer_max) { 594 int new_max = pfi_buffer_max * 2; 595 596 if (new_max > PFI_BUFFER_MAX) { 597 printf("pfi_address_add: address buffer full (%d/%d)\n", 598 pfi_buffer_cnt, PFI_BUFFER_MAX); 599 return; 600 } 601 p = malloc(new_max * sizeof(*pfi_buffer), PFI_MTYPE, M_NOWAIT); 602 if (p == NULL) { 603 printf("pfi_address_add: no memory to grow buffer " 604 "(%d/%d)\n", pfi_buffer_cnt, PFI_BUFFER_MAX); 605 return; 606 } 607 memcpy(p, pfi_buffer, pfi_buffer_cnt * sizeof(*pfi_buffer)); 608 /* no need to zero buffer */ 609 free(pfi_buffer, PFI_MTYPE); 610 pfi_buffer = p; 611 pfi_buffer_max = new_max; 612 } 613 if (af == AF_INET && net > 32) 614 net = 128; 615 p = pfi_buffer + pfi_buffer_cnt++; 616 bzero(p, sizeof(*p)); 617 p->pfra_af = af; 618 p->pfra_net = net; 619 if (af == AF_INET) 620 p->pfra_ip4addr = ((struct sockaddr_in *)sa)->sin_addr; 621 else if (af == AF_INET6) { 622 p->pfra_ip6addr = ((struct sockaddr_in6 *)sa)->sin6_addr; 623 if (IN6_IS_SCOPE_EMBEDDABLE(&p->pfra_ip6addr)) 624 p->pfra_ip6addr.s6_addr16[1] = 0; 625 } 626 /* mask network address bits */ 627 if (net < 128) 628 ((char *)p)[p->pfra_net/8] &= ~(0xFF >> (p->pfra_net%8)); 629 for (i = (p->pfra_net+7)/8; i < sizeof(p->pfra_u); i++) 630 ((char *)p)[i] = 0; 631 } 632 633 void 634 pfi_dynaddr_remove(struct pf_addr_wrap *aw) 635 { 636 int s; 637 638 if (aw->type != PF_ADDR_DYNIFTL || aw->p.dyn == NULL || 639 aw->p.dyn->pfid_kif == NULL || aw->p.dyn->pfid_kt == NULL) 640 return; 641 642 s = splsoftnet(); 643 TAILQ_REMOVE(&aw->p.dyn->pfid_kif->pfik_dynaddrs, aw->p.dyn, entry); 644 pfi_kif_unref(aw->p.dyn->pfid_kif, PFI_KIF_REF_RULE); 645 aw->p.dyn->pfid_kif = NULL; 646 pfr_detach_table(aw->p.dyn->pfid_kt); 647 aw->p.dyn->pfid_kt = NULL; 648 pool_put(&pfi_addr_pl, aw->p.dyn); 649 aw->p.dyn = NULL; 650 splx(s); 651 } 652 653 void 654 pfi_dynaddr_copyout(struct pf_addr_wrap *aw) 655 { 656 if (aw->type != PF_ADDR_DYNIFTL || aw->p.dyn == NULL || 657 aw->p.dyn->pfid_kif == NULL) 658 return; 659 aw->p.dyncnt = aw->p.dyn->pfid_acnt4 + aw->p.dyn->pfid_acnt6; 660 } 661 662 void 663 pfi_kifaddr_update(void *v) 664 { 665 int s; 666 struct pfi_kif *kif = (struct pfi_kif *)v; 667 668 s = splsoftnet(); 669 pfi_update++; 670 pfi_kif_update(kif); 671 splx(s); 672 } 673 674 int 675 pfi_if_compare(struct pfi_kif *p, struct pfi_kif *q) 676 { 677 return (strncmp(p->pfik_name, q->pfik_name, IFNAMSIZ)); 678 } 679 680 void 681 pfi_fill_oldstatus(struct pf_status *pfs) 682 { 683 struct pfi_kif *p; 684 struct pfi_kif_cmp key; 685 int i, j, k, s; 686 687 strlcpy(key.pfik_name, pfs->ifname, sizeof(key.pfik_name)); 688 s = splsoftnet(); 689 p = RB_FIND(pfi_ifhead, &pfi_ifs, (struct pfi_kif *)&key); 690 if (p == NULL) { 691 splx(s); 692 return; 693 } 694 bzero(pfs->pcounters, sizeof(pfs->pcounters)); 695 bzero(pfs->bcounters, sizeof(pfs->bcounters)); 696 for (i = 0; i < 2; i++) 697 for (j = 0; j < 2; j++) 698 for (k = 0; k < 2; k++) { 699 pfs->pcounters[i][j][k] = 700 p->pfik_packets[i][j][k]; 701 pfs->bcounters[i][j] += 702 p->pfik_bytes[i][j][k]; 703 } 704 splx(s); 705 } 706 707 int 708 pfi_clr_istats(const char *name) 709 { 710 struct pfi_kif *p; 711 int s; 712 713 s = splsoftnet(); 714 RB_FOREACH(p, pfi_ifhead, &pfi_ifs) { 715 if (pfi_skip_if(name, p)) 716 continue; 717 bzero(p->pfik_packets, sizeof(p->pfik_packets)); 718 bzero(p->pfik_bytes, sizeof(p->pfik_bytes)); 719 p->pfik_tzero = time_second; 720 } 721 splx(s); 722 723 return (0); 724 } 725 726 int 727 pfi_get_ifaces(const char *name, struct pfi_kif *buf, int *size) 728 { 729 struct pfi_kif *p, *nextp; 730 int s, n = 0; 731 732 s = splsoftnet(); 733 for (p = RB_MIN(pfi_ifhead, &pfi_ifs); p; p = nextp) { 734 nextp = RB_NEXT(pfi_ifhead, &pfi_ifs, p); 735 if (pfi_skip_if(name, p)) 736 continue; 737 if (*size > n++) { 738 if (!p->pfik_tzero) 739 p->pfik_tzero = time_second; 740 pfi_kif_ref(p, PFI_KIF_REF_RULE); 741 if (copyout(p, buf++, sizeof(*buf))) { 742 pfi_kif_unref(p, PFI_KIF_REF_RULE); 743 splx(s); 744 return (EFAULT); 745 } 746 nextp = RB_NEXT(pfi_ifhead, &pfi_ifs, p); 747 pfi_kif_unref(p, PFI_KIF_REF_RULE); 748 } 749 } 750 splx(s); 751 *size = n; 752 return (0); 753 } 754 755 int 756 pfi_skip_if(const char *filter, struct pfi_kif *p) 757 { 758 int n; 759 760 if (filter == NULL || !*filter) 761 return (0); 762 if (!strcmp(p->pfik_name, filter)) 763 return (0); /* exact match */ 764 n = strlen(filter); 765 if (n < 1 || n >= IFNAMSIZ) 766 return (1); /* sanity check */ 767 if (filter[n-1] >= '0' && filter[n-1] <= '9') 768 return (1); /* only do exact match in that case */ 769 if (strncmp(p->pfik_name, filter, n)) 770 return (1); /* prefix doesn't match */ 771 return (p->pfik_name[n] < '0' || p->pfik_name[n] > '9'); 772 } 773 774 int 775 pfi_set_flags(const char *name, int flags) 776 { 777 struct pfi_kif *p; 778 int s; 779 780 s = splsoftnet(); 781 RB_FOREACH(p, pfi_ifhead, &pfi_ifs) { 782 if (pfi_skip_if(name, p)) 783 continue; 784 p->pfik_flags |= flags; 785 } 786 splx(s); 787 return (0); 788 } 789 790 int 791 pfi_clear_flags(const char *name, int flags) 792 { 793 struct pfi_kif *p; 794 int s; 795 796 s = splsoftnet(); 797 RB_FOREACH(p, pfi_ifhead, &pfi_ifs) { 798 if (pfi_skip_if(name, p)) 799 continue; 800 p->pfik_flags &= ~flags; 801 } 802 splx(s); 803 return (0); 804 } 805 806 /* from pf_print_state.c */ 807 int 808 pfi_unmask(void *addr) 809 { 810 struct pf_addr *m = addr; 811 int i = 31, j = 0, b = 0; 812 u_int32_t tmp; 813 814 while (j < 4 && m->addr32[j] == 0xffffffff) { 815 b += 32; 816 j++; 817 } 818 if (j < 4) { 819 tmp = ntohl(m->addr32[j]); 820 for (i = 31; tmp & (1 << i); --i) 821 b++; 822 } 823 return (b); 824 } 825 826 #ifdef __NetBSD__ 827 static void 828 pfi_copy_group(char *dest, const char *src, ssize_t sz) 829 { 830 while (sz > 1 && *src && !(*src >= '0' && *src <= '9')) { 831 *dest++ = *src++; 832 sz--; 833 } 834 if (sz > 0) 835 *dest++ = '\0'; 836 } 837 838 void 839 pfi_init_groups(struct ifnet *ifp) 840 { 841 char group[IFNAMSIZ]; 842 843 if_init_groups(ifp); 844 if_addgroup(ifp, IFG_ALL); 845 846 pfi_copy_group(group, ifp->if_xname, sizeof(group)); 847 if_addgroup(ifp, group); 848 } 849 850 void 851 pfi_destroy_groups(struct ifnet *ifp) 852 { 853 char group[IFNAMSIZ]; 854 855 pfi_copy_group(group, ifp->if_xname, sizeof(group)); 856 if_delgroup(ifp, group); 857 858 if_delgroup(ifp, IFG_ALL); 859 if_destroy_groups(ifp); 860 } 861 862 int 863 pfil_ifnet_wrapper(void *arg, struct mbuf **mp, struct ifnet *ifp, int dir) 864 { 865 u_long cmd = (u_long)mp; 866 867 switch (cmd) { 868 case PFIL_IFNET_ATTACH: 869 pfi_init_groups(ifp); 870 871 pfi_attach_ifnet(ifp); 872 break; 873 case PFIL_IFNET_DETACH: 874 pfi_detach_ifnet(ifp); 875 876 pfi_destroy_groups(ifp); 877 break; 878 default: 879 panic("pfil_ifnet_wrapper: unexpected cmd %lu", cmd); 880 } 881 882 return (0); 883 } 884 885 int 886 pfil_ifaddr_wrapper(void *arg, struct mbuf **mp, struct ifnet *ifp, int dir) 887 { 888 u_long cmd = (u_long)mp; 889 890 switch (cmd) { 891 case SIOCSIFADDR: 892 case SIOCAIFADDR: 893 case SIOCDIFADDR: 894 #ifdef INET6 895 case SIOCAIFADDR_IN6: 896 case SIOCDIFADDR_IN6: 897 #endif /* INET6 */ 898 pfi_kifaddr_update(ifp->if_pf_kif); 899 break; 900 default: 901 panic("pfil_ifaddr_wrapper: unexpected ioctl %lu", cmd); 902 } 903 904 return (0); 905 } 906 #endif /* __NetBSD__ */ 907
Indexes created Sun Oct 12 05:10:08 GMT 2025