pf_if.c revision 1.21.22.2
1 /* $NetBSD: pf_if.c,v 1.21.22.2 2013/08/28 23:59:27 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 1.21.22.2 2013/08/28 23:59:27 rmind Exp $"); 38 39 #ifdef _KERNEL_OPT 40 #include "opt_inet.h" 41 #endif 42 43 #include <sys/param.h> 44 #include <sys/systm.h> 45 #include <sys/mbuf.h> 46 #include <sys/filio.h> 47 #include <sys/socket.h> 48 #include <sys/socketvar.h> 49 #include <sys/kernel.h> 50 #include <sys/device.h> 51 #include <sys/time.h> 52 53 #include <net/if.h> 54 #include <net/if_types.h> 55 56 #include <netinet/in.h> 57 #include <netinet/in_var.h> 58 #include <netinet/in_systm.h> 59 #include <netinet/ip.h> 60 #include <netinet/ip_var.h> 61 62 #include <net/pfvar.h> 63 64 #ifdef INET6 65 #include <netinet/ip6.h> 66 #endif /* INET6 */ 67 68 struct pfi_kif *pfi_all = NULL; 69 struct pool pfi_addr_pl; 70 struct pfi_ifhead pfi_ifs; 71 long pfi_update = 1; 72 struct pfr_addr *pfi_buffer; 73 int pfi_buffer_cnt; 74 int pfi_buffer_max; 75 76 void pfi_kif_update(struct pfi_kif *); 77 void pfi_dynaddr_update(struct pfi_dynaddr *dyn); 78 void pfi_table_update(struct pfr_ktable *, struct pfi_kif *, 79 int, int); 80 void pfi_kifaddr_update(void *); 81 void pfi_instance_add(struct ifnet *, int, int); 82 void pfi_address_add(struct sockaddr *, int, int); 83 int pfi_if_compare(struct pfi_kif *, struct pfi_kif *); 84 int pfi_skip_if(const char *, struct pfi_kif *); 85 int pfi_unmask(void *); 86 #ifdef __NetBSD__ 87 void pfi_init_groups(struct ifnet *); 88 void pfi_destroy_groups(struct ifnet *); 89 90 int pfil_ifnet_wrapper(void *, struct mbuf **, struct ifnet *, int); 91 int pfil_ifaddr_wrapper(void *, struct mbuf **, struct ifnet *, int); 92 #endif 93 94 RB_PROTOTYPE(pfi_ifhead, pfi_kif, pfik_tree, pfi_if_compare); 95 RB_GENERATE(pfi_ifhead, pfi_kif, pfik_tree, pfi_if_compare); 96 97 #define PFI_BUFFER_MAX 0x10000 98 #define PFI_MTYPE M_IFADDR 99 100 void 101 pfi_initialize(void) 102 { 103 if (pfi_all != NULL) /* already initialized */ 104 return; 105 106 #ifdef __NetBSD__ 107 pool_init(&pfi_addr_pl, sizeof(struct pfi_dynaddr), 0, 0, 0, 108 "pfiaddrpl", &pool_allocator_nointr, IPL_NONE); 109 #else 110 pool_init(&pfi_addr_pl, sizeof(struct pfi_dynaddr), 0, 0, 0, 111 "pfiaddrpl", &pool_allocator_nointr); 112 #endif /* !__NetBSD__ */ 113 pfi_buffer_max = 64; 114 pfi_buffer = malloc(pfi_buffer_max * sizeof(*pfi_buffer), 115 PFI_MTYPE, M_WAITOK); 116 117 if ((pfi_all = pfi_kif_get(IFG_ALL)) == NULL) 118 panic("pfi_kif_get for pfi_all failed"); 119 120 #ifdef __NetBSD__ 121 ifnet_t *ifp; 122 IFNET_FOREACH(ifp) { 123 pfi_init_groups(ifp); 124 pfi_attach_ifnet(ifp); 125 } 126 127 pfil_add_hook(pfil_ifnet_wrapper, NULL, PFIL_IFNET, if_pfil); 128 pfil_add_hook(pfil_ifaddr_wrapper, NULL, PFIL_IFADDR, if_pfil); 129 #endif /* __NetBSD__ */ 130 } 131 132 #ifdef _MODULE 133 void 134 pfi_destroy(void) 135 { 136 struct pfi_kif *p; 137 int i; 138 139 pfil_remove_hook(pfil_ifaddr_wrapper, NULL, PFIL_IFADDR, if_pfil); 140 pfil_remove_hook(pfil_ifnet_wrapper, NULL, PFIL_IFNET, if_pfil); 141 142 ifnet_t *ifp; 143 IFNET_FOREACH(ifp) { 144 if ((ifp = if_byindex(i)) != NULL) { 145 pfi_detach_ifnet(ifp); 146 pfi_destroy_groups(ifp); 147 } 148 } 149 150 while ((p = RB_MIN(pfi_ifhead, &pfi_ifs))) { 151 RB_REMOVE(pfi_ifhead, &pfi_ifs, p); 152 free(p, PFI_MTYPE); 153 } 154 155 pool_destroy(&pfi_addr_pl); 156 157 free(pfi_buffer, PFI_MTYPE); 158 } 159 #endif /* _MODULE */ 160 161 struct pfi_kif * 162 pfi_kif_get(const char *kif_name) 163 { 164 struct pfi_kif *kif; 165 struct pfi_kif_cmp s; 166 167 bzero(&s, sizeof(s)); 168 strlcpy(s.pfik_name, kif_name, sizeof(s.pfik_name)); 169 if ((kif = RB_FIND(pfi_ifhead, &pfi_ifs, (struct pfi_kif *)&s)) != NULL) 170 return (kif); 171 172 /* create new one */ 173 if ((kif = malloc(sizeof(*kif), PFI_MTYPE, M_NOWAIT|M_ZERO)) == NULL) 174 return (NULL); 175 176 strlcpy(kif->pfik_name, kif_name, sizeof(kif->pfik_name)); 177 #ifdef __NetBSD__ 178 /* time_second is not valid yet */ 179 kif->pfik_tzero = (time_second > 7200) ? time_second : 0; 180 #else 181 kif->pfik_tzero = time_second; 182 #endif /* !__NetBSD__ */ 183 TAILQ_INIT(&kif->pfik_dynaddrs); 184 185 RB_INSERT(pfi_ifhead, &pfi_ifs, kif); 186 return (kif); 187 } 188 189 void 190 pfi_kif_ref(struct pfi_kif *kif, enum pfi_kif_refs what) 191 { 192 switch (what) { 193 case PFI_KIF_REF_RULE: 194 kif->pfik_rules++; 195 break; 196 case PFI_KIF_REF_STATE: 197 kif->pfik_states++; 198 break; 199 default: 200 panic("pfi_kif_ref with unknown type"); 201 } 202 } 203 204 void 205 pfi_kif_unref(struct pfi_kif *kif, enum pfi_kif_refs what) 206 { 207 if (kif == NULL) 208 return; 209 210 switch (what) { 211 case PFI_KIF_REF_NONE: 212 break; 213 case PFI_KIF_REF_RULE: 214 if (kif->pfik_rules <= 0) { 215 printf("pfi_kif_unref: rules refcount <= 0\n"); 216 return; 217 } 218 kif->pfik_rules--; 219 break; 220 case PFI_KIF_REF_STATE: 221 if (kif->pfik_states <= 0) { 222 printf("pfi_kif_unref: state refcount <= 0\n"); 223 return; 224 } 225 kif->pfik_states--; 226 break; 227 default: 228 panic("pfi_kif_unref with unknown type"); 229 } 230 231 if (kif->pfik_ifp != NULL || kif->pfik_group != NULL || kif == pfi_all) 232 return; 233 234 if (kif->pfik_rules || kif->pfik_states) 235 return; 236 237 RB_REMOVE(pfi_ifhead, &pfi_ifs, kif); 238 free(kif, PFI_MTYPE); 239 } 240 241 int 242 pfi_kif_match(struct pfi_kif *rule_kif, struct pfi_kif *packet_kif) 243 { 244 struct ifg_list *p; 245 246 if (rule_kif == NULL || rule_kif == packet_kif) 247 return (1); 248 249 if (rule_kif->pfik_group != NULL) { 250 struct ifg_list_head *ifgh = 251 if_get_groups(packet_kif->pfik_ifp); 252 253 TAILQ_FOREACH(p, ifgh, ifgl_next) 254 if (p->ifgl_group == rule_kif->pfik_group) 255 return (1); 256 } 257 258 return (0); 259 } 260 261 void 262 pfi_attach_ifnet(struct ifnet *ifp) 263 { 264 struct pfi_kif *kif; 265 int s; 266 267 pfi_initialize(); 268 s = splsoftnet(); 269 pfi_update++; 270 if ((kif = pfi_kif_get(ifp->if_xname)) == NULL) 271 panic("pfi_kif_get failed"); 272 273 kif->pfik_ifp = ifp; 274 ifp->if_pf_kif = kif; 275 276 #ifndef __NetBSD__ 277 if ((kif->pfik_ah_cookie = hook_establish(ifp->if_addrhooks, 1, 278 pfi_kifaddr_update, kif)) == NULL) 279 panic("pfi_attach_ifnet: cannot allocate '%s' address hook", 280 ifp->if_xname); 281 #endif /* !__NetBSD__ */ 282 283 pfi_kif_update(kif); 284 285 splx(s); 286 } 287 288 void 289 pfi_detach_ifnet(struct ifnet *ifp) 290 { 291 int s; 292 struct pfi_kif *kif; 293 294 if ((kif = (struct pfi_kif *)ifp->if_pf_kif) == NULL) 295 return; 296 297 s = splsoftnet(); 298 pfi_update++; 299 #ifndef __NetBSD__ 300 hook_disestablish(ifp->if_addrhooks, kif->pfik_ah_cookie); 301 #endif /* !__NetBSD__ */ 302 pfi_kif_update(kif); 303 304 kif->pfik_ifp = NULL; 305 ifp->if_pf_kif = NULL; 306 pfi_kif_unref(kif, PFI_KIF_REF_NONE); 307 splx(s); 308 } 309 310 void 311 pfi_attach_ifgroup(struct ifg_group *ifg) 312 { 313 struct pfi_kif *kif; 314 int s; 315 316 pfi_initialize(); 317 s = splsoftnet(); 318 pfi_update++; 319 if ((kif = pfi_kif_get(ifg->ifg_group)) == NULL) 320 panic("pfi_kif_get failed"); 321 322 kif->pfik_group = ifg; 323 ifg->ifg_pf_kif = kif; 324 325 splx(s); 326 } 327 328 void 329 pfi_detach_ifgroup(struct ifg_group *ifg) 330 { 331 int s; 332 struct pfi_kif *kif; 333 334 if ((kif = (struct pfi_kif *)ifg->ifg_pf_kif) == NULL) 335 return; 336 337 s = splsoftnet(); 338 pfi_update++; 339 340 kif->pfik_group = NULL; 341 ifg->ifg_pf_kif = NULL; 342 pfi_kif_unref(kif, PFI_KIF_REF_NONE); 343 splx(s); 344 } 345 346 void 347 pfi_group_change(const char *group) 348 { 349 struct pfi_kif *kif; 350 int s; 351 352 s = splsoftnet(); 353 pfi_update++; 354 if ((kif = pfi_kif_get(group)) == NULL) 355 panic("pfi_kif_get failed"); 356 357 pfi_kif_update(kif); 358 359 splx(s); 360 } 361 362 int 363 pfi_match_addr(struct pfi_dynaddr *dyn, struct pf_addr *a, sa_family_t af) 364 { 365 switch (af) { 366 #ifdef INET 367 case AF_INET: 368 switch (dyn->pfid_acnt4) { 369 case 0: 370 return (0); 371 case 1: 372 return (PF_MATCHA(0, &dyn->pfid_addr4, 373 &dyn->pfid_mask4, a, AF_INET)); 374 default: 375 return (pfr_match_addr(dyn->pfid_kt, a, AF_INET)); 376 } 377 break; 378 #endif /* INET */ 379 #ifdef INET6 380 case AF_INET6: 381 switch (dyn->pfid_acnt6) { 382 case 0: 383 return (0); 384 case 1: 385 return (PF_MATCHA(0, &dyn->pfid_addr6, 386 &dyn->pfid_mask6, a, AF_INET6)); 387 default: 388 return (pfr_match_addr(dyn->pfid_kt, a, AF_INET6)); 389 } 390 break; 391 #endif /* INET6 */ 392 default: 393 return (0); 394 } 395 } 396 397 int 398 pfi_dynaddr_setup(struct pf_addr_wrap *aw, sa_family_t af) 399 { 400 struct pfi_dynaddr *dyn; 401 char tblname[PF_TABLE_NAME_SIZE]; 402 struct pf_ruleset *ruleset = NULL; 403 int s, rv = 0; 404 405 if (aw->type != PF_ADDR_DYNIFTL) 406 return (0); 407 if ((dyn = pool_get(&pfi_addr_pl, PR_NOWAIT)) == NULL) 408 return (1); 409 bzero(dyn, sizeof(*dyn)); 410 411 s = splsoftnet(); 412 if (!strcmp(aw->v.ifname, "self")) 413 dyn->pfid_kif = pfi_kif_get(IFG_ALL); 414 else 415 dyn->pfid_kif = pfi_kif_get(aw->v.ifname); 416 if (dyn->pfid_kif == NULL) { 417 rv = 1; 418 goto _bad; 419 } 420 pfi_kif_ref(dyn->pfid_kif, PFI_KIF_REF_RULE); 421 422 dyn->pfid_net = pfi_unmask(&aw->v.a.mask); 423 if (af == AF_INET && dyn->pfid_net == 32) 424 dyn->pfid_net = 128; 425 strlcpy(tblname, aw->v.ifname, sizeof(tblname)); 426 if (aw->iflags & PFI_AFLAG_NETWORK) 427 strlcat(tblname, ":network", sizeof(tblname)); 428 if (aw->iflags & PFI_AFLAG_BROADCAST) 429 strlcat(tblname, ":broadcast", sizeof(tblname)); 430 if (aw->iflags & PFI_AFLAG_PEER) 431 strlcat(tblname, ":peer", sizeof(tblname)); 432 if (aw->iflags & PFI_AFLAG_NOALIAS) 433 strlcat(tblname, ":0", sizeof(tblname)); 434 if (dyn->pfid_net != 128) 435 snprintf(tblname + strlen(tblname), 436 sizeof(tblname) - strlen(tblname), "/%d", dyn->pfid_net); 437 if ((ruleset = pf_find_or_create_ruleset(PF_RESERVED_ANCHOR)) == NULL) { 438 rv = 1; 439 goto _bad; 440 } 441 442 if ((dyn->pfid_kt = pfr_attach_table(ruleset, tblname)) == NULL) { 443 rv = 1; 444 goto _bad; 445 } 446 447 dyn->pfid_kt->pfrkt_flags |= PFR_TFLAG_ACTIVE; 448 dyn->pfid_iflags = aw->iflags; 449 dyn->pfid_af = af; 450 451 TAILQ_INSERT_TAIL(&dyn->pfid_kif->pfik_dynaddrs, dyn, entry); 452 aw->p.dyn = dyn; 453 pfi_kif_update(dyn->pfid_kif); 454 splx(s); 455 return (0); 456 457 _bad: 458 if (dyn->pfid_kt != NULL) 459 pfr_detach_table(dyn->pfid_kt); 460 if (ruleset != NULL) 461 pf_remove_if_empty_ruleset(ruleset); 462 if (dyn->pfid_kif != NULL) 463 pfi_kif_unref(dyn->pfid_kif, PFI_KIF_REF_RULE); 464 pool_put(&pfi_addr_pl, dyn); 465 splx(s); 466 return (rv); 467 } 468 469 void 470 pfi_kif_update(struct pfi_kif *kif) 471 { 472 struct ifg_list *ifgl; 473 struct pfi_dynaddr *p; 474 475 /* update all dynaddr */ 476 TAILQ_FOREACH(p, &kif->pfik_dynaddrs, entry) 477 pfi_dynaddr_update(p); 478 479 /* again for all groups kif is member of */ 480 if (kif->pfik_ifp != NULL) { 481 struct ifg_list_head *ifgh = if_get_groups(kif->pfik_ifp); 482 483 TAILQ_FOREACH(ifgl, ifgh, ifgl_next) 484 pfi_kif_update((struct pfi_kif *) 485 ifgl->ifgl_group->ifg_pf_kif); 486 } 487 } 488 489 void 490 pfi_dynaddr_update(struct pfi_dynaddr *dyn) 491 { 492 struct pfi_kif *kif; 493 struct pfr_ktable *kt; 494 495 if (dyn == NULL || dyn->pfid_kif == NULL || dyn->pfid_kt == NULL) 496 panic("pfi_dynaddr_update"); 497 498 kif = dyn->pfid_kif; 499 kt = dyn->pfid_kt; 500 501 if (kt->pfrkt_larg != pfi_update) { 502 /* this table needs to be brought up-to-date */ 503 pfi_table_update(kt, kif, dyn->pfid_net, dyn->pfid_iflags); 504 kt->pfrkt_larg = pfi_update; 505 } 506 pfr_dynaddr_update(kt, dyn); 507 } 508 509 void 510 pfi_table_update(struct pfr_ktable *kt, struct pfi_kif *kif, int net, int flags) 511 { 512 int e, size2 = 0; 513 struct ifg_member *ifgm; 514 515 pfi_buffer_cnt = 0; 516 517 if (kif->pfik_ifp != NULL) 518 pfi_instance_add(kif->pfik_ifp, net, flags); 519 else if (kif->pfik_group != NULL) 520 TAILQ_FOREACH(ifgm, &kif->pfik_group->ifg_members, ifgm_next) 521 pfi_instance_add(ifgm->ifgm_ifp, net, flags); 522 523 if ((e = pfr_set_addrs(&kt->pfrkt_t, pfi_buffer, pfi_buffer_cnt, &size2, 524 NULL, NULL, NULL, 0, PFR_TFLAG_ALLMASK))) 525 printf("pfi_table_update: cannot set %d new addresses " 526 "into table %s: %d\n", pfi_buffer_cnt, kt->pfrkt_name, e); 527 } 528 529 void 530 pfi_instance_add(struct ifnet *ifp, int net, int flags) 531 { 532 struct ifaddr *ia; 533 int got4 = 0, got6 = 0; 534 int net2, af; 535 536 if (ifp == NULL) 537 return; 538 IFADDR_FOREACH(ia, ifp) { 539 if (ia->ifa_addr == NULL) 540 continue; 541 af = ia->ifa_addr->sa_family; 542 if (af != AF_INET && af != AF_INET6) 543 continue; 544 if ((flags & PFI_AFLAG_BROADCAST) && af == AF_INET6) 545 continue; 546 if ((flags & PFI_AFLAG_BROADCAST) && 547 !(ifp->if_flags & IFF_BROADCAST)) 548 continue; 549 if ((flags & PFI_AFLAG_PEER) && 550 !(ifp->if_flags & IFF_POINTOPOINT)) 551 continue; 552 if ((flags & PFI_AFLAG_NETWORK) && af == AF_INET6 && 553 IN6_IS_ADDR_LINKLOCAL( 554 &((struct sockaddr_in6 *)ia->ifa_addr)->sin6_addr)) 555 continue; 556 if (flags & PFI_AFLAG_NOALIAS) { 557 if (af == AF_INET && got4) 558 continue; 559 if (af == AF_INET6 && got6) 560 continue; 561 } 562 if (af == AF_INET) 563 got4 = 1; 564 else if (af == AF_INET6) 565 got6 = 1; 566 net2 = net; 567 if (net2 == 128 && (flags & PFI_AFLAG_NETWORK)) { 568 if (af == AF_INET) 569 net2 = pfi_unmask(&((struct sockaddr_in *) 570 ia->ifa_netmask)->sin_addr); 571 else if (af == AF_INET6) 572 net2 = pfi_unmask(&((struct sockaddr_in6 *) 573 ia->ifa_netmask)->sin6_addr); 574 } 575 if (af == AF_INET && net2 > 32) 576 net2 = 32; 577 if (flags & PFI_AFLAG_BROADCAST) 578 pfi_address_add(ia->ifa_broadaddr, af, net2); 579 else if (flags & PFI_AFLAG_PEER) 580 pfi_address_add(ia->ifa_dstaddr, af, net2); 581 else 582 pfi_address_add(ia->ifa_addr, af, net2); 583 } 584 } 585 586 void 587 pfi_address_add(struct sockaddr *sa, int af, int net) 588 { 589 struct pfr_addr *p; 590 int i; 591 592 if (pfi_buffer_cnt >= pfi_buffer_max) { 593 int new_max = pfi_buffer_max * 2; 594 595 if (new_max > PFI_BUFFER_MAX) { 596 printf("pfi_address_add: address buffer full (%d/%d)\n", 597 pfi_buffer_cnt, PFI_BUFFER_MAX); 598 return; 599 } 600 p = malloc(new_max * sizeof(*pfi_buffer), PFI_MTYPE, M_NOWAIT); 601 if (p == NULL) { 602 printf("pfi_address_add: no memory to grow buffer " 603 "(%d/%d)\n", pfi_buffer_cnt, PFI_BUFFER_MAX); 604 return; 605 } 606 memcpy(p, pfi_buffer, pfi_buffer_cnt * sizeof(*pfi_buffer)); 607 /* no need to zero buffer */ 608 free(pfi_buffer, PFI_MTYPE); 609 pfi_buffer = p; 610 pfi_buffer_max = new_max; 611 } 612 if (af == AF_INET && net > 32) 613 net = 128; 614 p = pfi_buffer + pfi_buffer_cnt++; 615 bzero(p, sizeof(*p)); 616 p->pfra_af = af; 617 p->pfra_net = net; 618 if (af == AF_INET) 619 p->pfra_ip4addr = ((struct sockaddr_in *)sa)->sin_addr; 620 else if (af == AF_INET6) { 621 p->pfra_ip6addr = ((struct sockaddr_in6 *)sa)->sin6_addr; 622 if (IN6_IS_SCOPE_EMBEDDABLE(&p->pfra_ip6addr)) 623 p->pfra_ip6addr.s6_addr16[1] = 0; 624 } 625 /* mask network address bits */ 626 if (net < 128) 627 ((char *)p)[p->pfra_net/8] &= ~(0xFF >> (p->pfra_net%8)); 628 for (i = (p->pfra_net+7)/8; i < sizeof(p->pfra_u); i++) 629 ((char *)p)[i] = 0; 630 } 631 632 void 633 pfi_dynaddr_remove(struct pf_addr_wrap *aw) 634 { 635 int s; 636 637 if (aw->type != PF_ADDR_DYNIFTL || aw->p.dyn == NULL || 638 aw->p.dyn->pfid_kif == NULL || aw->p.dyn->pfid_kt == NULL) 639 return; 640 641 s = splsoftnet(); 642 TAILQ_REMOVE(&aw->p.dyn->pfid_kif->pfik_dynaddrs, aw->p.dyn, entry); 643 pfi_kif_unref(aw->p.dyn->pfid_kif, PFI_KIF_REF_RULE); 644 aw->p.dyn->pfid_kif = NULL; 645 pfr_detach_table(aw->p.dyn->pfid_kt); 646 aw->p.dyn->pfid_kt = NULL; 647 pool_put(&pfi_addr_pl, aw->p.dyn); 648 aw->p.dyn = NULL; 649 splx(s); 650 } 651 652 void 653 pfi_dynaddr_copyout(struct pf_addr_wrap *aw) 654 { 655 if (aw->type != PF_ADDR_DYNIFTL || aw->p.dyn == NULL || 656 aw->p.dyn->pfid_kif == NULL) 657 return; 658 aw->p.dyncnt = aw->p.dyn->pfid_acnt4 + aw->p.dyn->pfid_acnt6; 659 } 660 661 void 662 pfi_kifaddr_update(void *v) 663 { 664 int s; 665 struct pfi_kif *kif = (struct pfi_kif *)v; 666 667 s = splsoftnet(); 668 pfi_update++; 669 pfi_kif_update(kif); 670 splx(s); 671 } 672 673 int 674 pfi_if_compare(struct pfi_kif *p, struct pfi_kif *q) 675 { 676 return (strncmp(p->pfik_name, q->pfik_name, IFNAMSIZ)); 677 } 678 679 void 680 pfi_fill_oldstatus(struct pf_status *pfs) 681 { 682 struct pfi_kif *p; 683 struct pfi_kif_cmp key; 684 int i, j, k, s; 685 686 strlcpy(key.pfik_name, pfs->ifname, sizeof(key.pfik_name)); 687 s = splsoftnet(); 688 p = RB_FIND(pfi_ifhead, &pfi_ifs, (struct pfi_kif *)&key); 689 if (p == NULL) { 690 splx(s); 691 return; 692 } 693 bzero(pfs->pcounters, sizeof(pfs->pcounters)); 694 bzero(pfs->bcounters, sizeof(pfs->bcounters)); 695 for (i = 0; i < 2; i++) 696 for (j = 0; j < 2; j++) 697 for (k = 0; k < 2; k++) { 698 pfs->pcounters[i][j][k] = 699 p->pfik_packets[i][j][k]; 700 pfs->bcounters[i][j] += 701 p->pfik_bytes[i][j][k]; 702 } 703 splx(s); 704 } 705 706 int 707 pfi_clr_istats(const char *name) 708 { 709 struct pfi_kif *p; 710 int s; 711 712 s = splsoftnet(); 713 RB_FOREACH(p, pfi_ifhead, &pfi_ifs) { 714 if (pfi_skip_if(name, p)) 715 continue; 716 bzero(p->pfik_packets, sizeof(p->pfik_packets)); 717 bzero(p->pfik_bytes, sizeof(p->pfik_bytes)); 718 p->pfik_tzero = time_second; 719 } 720 splx(s); 721 722 return (0); 723 } 724 725 int 726 pfi_get_ifaces(const char *name, struct pfi_kif *buf, int *size) 727 { 728 struct pfi_kif *p, *nextp; 729 int s, n = 0; 730 731 s = splsoftnet(); 732 for (p = RB_MIN(pfi_ifhead, &pfi_ifs); p; p = nextp) { 733 nextp = RB_NEXT(pfi_ifhead, &pfi_ifs, p); 734 if (pfi_skip_if(name, p)) 735 continue; 736 if (*size > n++) { 737 if (!p->pfik_tzero) 738 p->pfik_tzero = time_second; 739 pfi_kif_ref(p, PFI_KIF_REF_RULE); 740 if (copyout(p, buf++, sizeof(*buf))) { 741 pfi_kif_unref(p, PFI_KIF_REF_RULE); 742 splx(s); 743 return (EFAULT); 744 } 745 nextp = RB_NEXT(pfi_ifhead, &pfi_ifs, p); 746 pfi_kif_unref(p, PFI_KIF_REF_RULE); 747 } 748 } 749 splx(s); 750 *size = n; 751 return (0); 752 } 753 754 int 755 pfi_skip_if(const char *filter, struct pfi_kif *p) 756 { 757 int n; 758 759 if (filter == NULL || !*filter) 760 return (0); 761 if (!strcmp(p->pfik_name, filter)) 762 return (0); /* exact match */ 763 n = strlen(filter); 764 if (n < 1 || n >= IFNAMSIZ) 765 return (1); /* sanity check */ 766 if (filter[n-1] >= '0' && filter[n-1] <= '9') 767 return (1); /* only do exact match in that case */ 768 if (strncmp(p->pfik_name, filter, n)) 769 return (1); /* prefix doesn't match */ 770 return (p->pfik_name[n] < '0' || p->pfik_name[n] > '9'); 771 } 772 773 int 774 pfi_set_flags(const char *name, int flags) 775 { 776 struct pfi_kif *p; 777 int s; 778 779 s = splsoftnet(); 780 RB_FOREACH(p, pfi_ifhead, &pfi_ifs) { 781 if (pfi_skip_if(name, p)) 782 continue; 783 p->pfik_flags |= flags; 784 } 785 splx(s); 786 return (0); 787 } 788 789 int 790 pfi_clear_flags(const char *name, int flags) 791 { 792 struct pfi_kif *p; 793 int s; 794 795 s = splsoftnet(); 796 RB_FOREACH(p, pfi_ifhead, &pfi_ifs) { 797 if (pfi_skip_if(name, p)) 798 continue; 799 p->pfik_flags &= ~flags; 800 } 801 splx(s); 802 return (0); 803 } 804 805 /* from pf_print_state.c */ 806 int 807 pfi_unmask(void *addr) 808 { 809 struct pf_addr *m = addr; 810 int i = 31, j = 0, b = 0; 811 u_int32_t tmp; 812 813 while (j < 4 && m->addr32[j] == 0xffffffff) { 814 b += 32; 815 j++; 816 } 817 if (j < 4) { 818 tmp = ntohl(m->addr32[j]); 819 for (i = 31; tmp & (1 << i); --i) 820 b++; 821 } 822 return (b); 823 } 824 825 #ifdef __NetBSD__ 826 static void 827 pfi_copy_group(char *dest, const char *src, ssize_t sz) 828 { 829 while (sz > 1 && *src && !(*src >= '0' && *src <= '9')) { 830 *dest++ = *src++; 831 sz--; 832 } 833 if (sz > 0) 834 *dest++ = '\0'; 835 } 836 837 void 838 pfi_init_groups(struct ifnet *ifp) 839 { 840 char group[IFNAMSIZ]; 841 842 if_init_groups(ifp); 843 if_addgroup(ifp, IFG_ALL); 844 845 pfi_copy_group(group, ifp->if_xname, sizeof(group)); 846 if_addgroup(ifp, group); 847 } 848 849 void 850 pfi_destroy_groups(struct ifnet *ifp) 851 { 852 char group[IFNAMSIZ]; 853 854 pfi_copy_group(group, ifp->if_xname, sizeof(group)); 855 if_delgroup(ifp, group); 856 857 if_delgroup(ifp, IFG_ALL); 858 if_destroy_groups(ifp); 859 } 860 861 int 862 pfil_ifnet_wrapper(void *arg, struct mbuf **mp, struct ifnet *ifp, int dir) 863 { 864 u_long cmd = (u_long)mp; 865 866 switch (cmd) { 867 case PFIL_IFNET_ATTACH: 868 pfi_init_groups(ifp); 869 870 pfi_attach_ifnet(ifp); 871 break; 872 case PFIL_IFNET_DETACH: 873 pfi_detach_ifnet(ifp); 874 875 pfi_destroy_groups(ifp); 876 break; 877 default: 878 panic("pfil_ifnet_wrapper: unexpected cmd %lu", cmd); 879 } 880 881 return (0); 882 } 883 884 int 885 pfil_ifaddr_wrapper(void *arg, struct mbuf **mp, struct ifnet *ifp, int dir) 886 { 887 u_long cmd = (u_long)mp; 888 889 switch (cmd) { 890 case SIOCSIFADDR: 891 case SIOCAIFADDR: 892 case SIOCDIFADDR: 893 #ifdef INET6 894 case SIOCAIFADDR_IN6: 895 case SIOCDIFADDR_IN6: 896 #endif /* INET6 */ 897 pfi_kifaddr_update(ifp->if_pf_kif); 898 break; 899 default: 900 panic("pfil_ifaddr_wrapper: unexpected ioctl %lu", cmd); 901 } 902 903 return (0); 904 } 905 #endif /* __NetBSD__ */ 906
Indexes created Sun Oct 12 05:10:08 GMT 2025