pf_if.c revision 1.20
1 /* $NetBSD: pf_if.c,v 1.20 2009/12/06 16:46:11 dsl 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 1.20 2009/12/06 16:46:11 dsl 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 struct pfi_kif * 142 pfi_kif_get(const char *kif_name) 143 { 144 struct pfi_kif *kif; 145 struct pfi_kif_cmp s; 146 147 bzero(&s, sizeof(s)); 148 strlcpy(s.pfik_name, kif_name, sizeof(s.pfik_name)); 149 if ((kif = RB_FIND(pfi_ifhead, &pfi_ifs, (struct pfi_kif *)&s)) != NULL) 150 return (kif); 151 152 /* create new one */ 153 if ((kif = malloc(sizeof(*kif), PFI_MTYPE, M_NOWAIT|M_ZERO)) == NULL) 154 return (NULL); 155 156 strlcpy(kif->pfik_name, kif_name, sizeof(kif->pfik_name)); 157 #ifdef __NetBSD__ 158 /* time_second is not valid yet */ 159 kif->pfik_tzero = (time_second > 7200) ? time_second : 0; 160 #else 161 kif->pfik_tzero = time_second; 162 #endif /* !__NetBSD__ */ 163 TAILQ_INIT(&kif->pfik_dynaddrs); 164 165 RB_INSERT(pfi_ifhead, &pfi_ifs, kif); 166 return (kif); 167 } 168 169 void 170 pfi_kif_ref(struct pfi_kif *kif, enum pfi_kif_refs what) 171 { 172 switch (what) { 173 case PFI_KIF_REF_RULE: 174 kif->pfik_rules++; 175 break; 176 case PFI_KIF_REF_STATE: 177 kif->pfik_states++; 178 break; 179 default: 180 panic("pfi_kif_ref with unknown type"); 181 } 182 } 183 184 void 185 pfi_kif_unref(struct pfi_kif *kif, enum pfi_kif_refs what) 186 { 187 if (kif == NULL) 188 return; 189 190 switch (what) { 191 case PFI_KIF_REF_NONE: 192 break; 193 case PFI_KIF_REF_RULE: 194 if (kif->pfik_rules <= 0) { 195 printf("pfi_kif_unref: rules refcount <= 0\n"); 196 return; 197 } 198 kif->pfik_rules--; 199 break; 200 case PFI_KIF_REF_STATE: 201 if (kif->pfik_states <= 0) { 202 printf("pfi_kif_unref: state refcount <= 0\n"); 203 return; 204 } 205 kif->pfik_states--; 206 break; 207 default: 208 panic("pfi_kif_unref with unknown type"); 209 } 210 211 if (kif->pfik_ifp != NULL || kif->pfik_group != NULL || kif == pfi_all) 212 return; 213 214 if (kif->pfik_rules || kif->pfik_states) 215 return; 216 217 RB_REMOVE(pfi_ifhead, &pfi_ifs, kif); 218 free(kif, PFI_MTYPE); 219 } 220 221 int 222 pfi_kif_match(struct pfi_kif *rule_kif, struct pfi_kif *packet_kif) 223 { 224 struct ifg_list *p; 225 226 if (rule_kif == NULL || rule_kif == packet_kif) 227 return (1); 228 229 if (rule_kif->pfik_group != NULL) { 230 struct ifg_list_head *ifgh = 231 if_get_groups(packet_kif->pfik_ifp); 232 233 TAILQ_FOREACH(p, ifgh, ifgl_next) 234 if (p->ifgl_group == rule_kif->pfik_group) 235 return (1); 236 } 237 238 return (0); 239 } 240 241 void 242 pfi_attach_ifnet(struct ifnet *ifp) 243 { 244 struct pfi_kif *kif; 245 int s; 246 247 pfi_initialize(); 248 s = splsoftnet(); 249 pfi_update++; 250 if ((kif = pfi_kif_get(ifp->if_xname)) == NULL) 251 panic("pfi_kif_get failed"); 252 253 kif->pfik_ifp = ifp; 254 ifp->if_pf_kif = kif; 255 256 #ifndef __NetBSD__ 257 if ((kif->pfik_ah_cookie = hook_establish(ifp->if_addrhooks, 1, 258 pfi_kifaddr_update, kif)) == NULL) 259 panic("pfi_attach_ifnet: cannot allocate '%s' address hook", 260 ifp->if_xname); 261 #endif /* !__NetBSD__ */ 262 263 pfi_kif_update(kif); 264 265 splx(s); 266 } 267 268 void 269 pfi_detach_ifnet(struct ifnet *ifp) 270 { 271 int s; 272 struct pfi_kif *kif; 273 274 if ((kif = (struct pfi_kif *)ifp->if_pf_kif) == NULL) 275 return; 276 277 s = splsoftnet(); 278 pfi_update++; 279 #ifndef __NetBSD__ 280 hook_disestablish(ifp->if_addrhooks, kif->pfik_ah_cookie); 281 #endif /* !__NetBSD__ */ 282 pfi_kif_update(kif); 283 284 kif->pfik_ifp = NULL; 285 ifp->if_pf_kif = NULL; 286 pfi_kif_unref(kif, PFI_KIF_REF_NONE); 287 splx(s); 288 } 289 290 void 291 pfi_attach_ifgroup(struct ifg_group *ifg) 292 { 293 struct pfi_kif *kif; 294 int s; 295 296 pfi_initialize(); 297 s = splsoftnet(); 298 pfi_update++; 299 if ((kif = pfi_kif_get(ifg->ifg_group)) == NULL) 300 panic("pfi_kif_get failed"); 301 302 kif->pfik_group = ifg; 303 ifg->ifg_pf_kif = kif; 304 305 splx(s); 306 } 307 308 void 309 pfi_detach_ifgroup(struct ifg_group *ifg) 310 { 311 int s; 312 struct pfi_kif *kif; 313 314 if ((kif = (struct pfi_kif *)ifg->ifg_pf_kif) == NULL) 315 return; 316 317 s = splsoftnet(); 318 pfi_update++; 319 320 kif->pfik_group = NULL; 321 ifg->ifg_pf_kif = NULL; 322 pfi_kif_unref(kif, PFI_KIF_REF_NONE); 323 splx(s); 324 } 325 326 void 327 pfi_group_change(const char *group) 328 { 329 struct pfi_kif *kif; 330 int s; 331 332 s = splsoftnet(); 333 pfi_update++; 334 if ((kif = pfi_kif_get(group)) == NULL) 335 panic("pfi_kif_get failed"); 336 337 pfi_kif_update(kif); 338 339 splx(s); 340 } 341 342 int 343 pfi_match_addr(struct pfi_dynaddr *dyn, struct pf_addr *a, sa_family_t af) 344 { 345 switch (af) { 346 #ifdef INET 347 case AF_INET: 348 switch (dyn->pfid_acnt4) { 349 case 0: 350 return (0); 351 case 1: 352 return (PF_MATCHA(0, &dyn->pfid_addr4, 353 &dyn->pfid_mask4, a, AF_INET)); 354 default: 355 return (pfr_match_addr(dyn->pfid_kt, a, AF_INET)); 356 } 357 break; 358 #endif /* INET */ 359 #ifdef INET6 360 case AF_INET6: 361 switch (dyn->pfid_acnt6) { 362 case 0: 363 return (0); 364 case 1: 365 return (PF_MATCHA(0, &dyn->pfid_addr6, 366 &dyn->pfid_mask6, a, AF_INET6)); 367 default: 368 return (pfr_match_addr(dyn->pfid_kt, a, AF_INET6)); 369 } 370 break; 371 #endif /* INET6 */ 372 default: 373 return (0); 374 } 375 } 376 377 int 378 pfi_dynaddr_setup(struct pf_addr_wrap *aw, sa_family_t af) 379 { 380 struct pfi_dynaddr *dyn; 381 char tblname[PF_TABLE_NAME_SIZE]; 382 struct pf_ruleset *ruleset = NULL; 383 int s, rv = 0; 384 385 if (aw->type != PF_ADDR_DYNIFTL) 386 return (0); 387 if ((dyn = pool_get(&pfi_addr_pl, PR_NOWAIT)) == NULL) 388 return (1); 389 bzero(dyn, sizeof(*dyn)); 390 391 s = splsoftnet(); 392 if (!strcmp(aw->v.ifname, "self")) 393 dyn->pfid_kif = pfi_kif_get(IFG_ALL); 394 else 395 dyn->pfid_kif = pfi_kif_get(aw->v.ifname); 396 if (dyn->pfid_kif == NULL) { 397 rv = 1; 398 goto _bad; 399 } 400 pfi_kif_ref(dyn->pfid_kif, PFI_KIF_REF_RULE); 401 402 dyn->pfid_net = pfi_unmask(&aw->v.a.mask); 403 if (af == AF_INET && dyn->pfid_net == 32) 404 dyn->pfid_net = 128; 405 strlcpy(tblname, aw->v.ifname, sizeof(tblname)); 406 if (aw->iflags & PFI_AFLAG_NETWORK) 407 strlcat(tblname, ":network", sizeof(tblname)); 408 if (aw->iflags & PFI_AFLAG_BROADCAST) 409 strlcat(tblname, ":broadcast", sizeof(tblname)); 410 if (aw->iflags & PFI_AFLAG_PEER) 411 strlcat(tblname, ":peer", sizeof(tblname)); 412 if (aw->iflags & PFI_AFLAG_NOALIAS) 413 strlcat(tblname, ":0", sizeof(tblname)); 414 if (dyn->pfid_net != 128) 415 snprintf(tblname + strlen(tblname), 416 sizeof(tblname) - strlen(tblname), "/%d", dyn->pfid_net); 417 if ((ruleset = pf_find_or_create_ruleset(PF_RESERVED_ANCHOR)) == NULL) { 418 rv = 1; 419 goto _bad; 420 } 421 422 if ((dyn->pfid_kt = pfr_attach_table(ruleset, tblname)) == NULL) { 423 rv = 1; 424 goto _bad; 425 } 426 427 dyn->pfid_kt->pfrkt_flags |= PFR_TFLAG_ACTIVE; 428 dyn->pfid_iflags = aw->iflags; 429 dyn->pfid_af = af; 430 431 TAILQ_INSERT_TAIL(&dyn->pfid_kif->pfik_dynaddrs, dyn, entry); 432 aw->p.dyn = dyn; 433 pfi_kif_update(dyn->pfid_kif); 434 splx(s); 435 return (0); 436 437 _bad: 438 if (dyn->pfid_kt != NULL) 439 pfr_detach_table(dyn->pfid_kt); 440 if (ruleset != NULL) 441 pf_remove_if_empty_ruleset(ruleset); 442 if (dyn->pfid_kif != NULL) 443 pfi_kif_unref(dyn->pfid_kif, PFI_KIF_REF_RULE); 444 pool_put(&pfi_addr_pl, dyn); 445 splx(s); 446 return (rv); 447 } 448 449 void 450 pfi_kif_update(struct pfi_kif *kif) 451 { 452 struct ifg_list *ifgl; 453 struct pfi_dynaddr *p; 454 455 /* update all dynaddr */ 456 TAILQ_FOREACH(p, &kif->pfik_dynaddrs, entry) 457 pfi_dynaddr_update(p); 458 459 /* again for all groups kif is member of */ 460 if (kif->pfik_ifp != NULL) { 461 struct ifg_list_head *ifgh = if_get_groups(kif->pfik_ifp); 462 463 TAILQ_FOREACH(ifgl, ifgh, ifgl_next) 464 pfi_kif_update((struct pfi_kif *) 465 ifgl->ifgl_group->ifg_pf_kif); 466 } 467 } 468 469 void 470 pfi_dynaddr_update(struct pfi_dynaddr *dyn) 471 { 472 struct pfi_kif *kif; 473 struct pfr_ktable *kt; 474 475 if (dyn == NULL || dyn->pfid_kif == NULL || dyn->pfid_kt == NULL) 476 panic("pfi_dynaddr_update"); 477 478 kif = dyn->pfid_kif; 479 kt = dyn->pfid_kt; 480 481 if (kt->pfrkt_larg != pfi_update) { 482 /* this table needs to be brought up-to-date */ 483 pfi_table_update(kt, kif, dyn->pfid_net, dyn->pfid_iflags); 484 kt->pfrkt_larg = pfi_update; 485 } 486 pfr_dynaddr_update(kt, dyn); 487 } 488 489 void 490 pfi_table_update(struct pfr_ktable *kt, struct pfi_kif *kif, int net, int flags) 491 { 492 int e, size2 = 0; 493 struct ifg_member *ifgm; 494 495 pfi_buffer_cnt = 0; 496 497 if (kif->pfik_ifp != NULL) 498 pfi_instance_add(kif->pfik_ifp, net, flags); 499 else if (kif->pfik_group != NULL) 500 TAILQ_FOREACH(ifgm, &kif->pfik_group->ifg_members, ifgm_next) 501 pfi_instance_add(ifgm->ifgm_ifp, net, flags); 502 503 if ((e = pfr_set_addrs(&kt->pfrkt_t, pfi_buffer, pfi_buffer_cnt, &size2, 504 NULL, NULL, NULL, 0, PFR_TFLAG_ALLMASK))) 505 printf("pfi_table_update: cannot set %d new addresses " 506 "into table %s: %d\n", pfi_buffer_cnt, kt->pfrkt_name, e); 507 } 508 509 void 510 pfi_instance_add(struct ifnet *ifp, int net, int flags) 511 { 512 struct ifaddr *ia; 513 int got4 = 0, got6 = 0; 514 int net2, af; 515 516 if (ifp == NULL) 517 return; 518 IFADDR_FOREACH(ia, ifp) { 519 if (ia->ifa_addr == NULL) 520 continue; 521 af = ia->ifa_addr->sa_family; 522 if (af != AF_INET && af != AF_INET6) 523 continue; 524 if ((flags & PFI_AFLAG_BROADCAST) && af == AF_INET6) 525 continue; 526 if ((flags & PFI_AFLAG_BROADCAST) && 527 !(ifp->if_flags & IFF_BROADCAST)) 528 continue; 529 if ((flags & PFI_AFLAG_PEER) && 530 !(ifp->if_flags & IFF_POINTOPOINT)) 531 continue; 532 if ((flags & PFI_AFLAG_NETWORK) && af == AF_INET6 && 533 IN6_IS_ADDR_LINKLOCAL( 534 &((struct sockaddr_in6 *)ia->ifa_addr)->sin6_addr)) 535 continue; 536 if (flags & PFI_AFLAG_NOALIAS) { 537 if (af == AF_INET && got4) 538 continue; 539 if (af == AF_INET6 && got6) 540 continue; 541 } 542 if (af == AF_INET) 543 got4 = 1; 544 else if (af == AF_INET6) 545 got6 = 1; 546 net2 = net; 547 if (net2 == 128 && (flags & PFI_AFLAG_NETWORK)) { 548 if (af == AF_INET) 549 net2 = pfi_unmask(&((struct sockaddr_in *) 550 ia->ifa_netmask)->sin_addr); 551 else if (af == AF_INET6) 552 net2 = pfi_unmask(&((struct sockaddr_in6 *) 553 ia->ifa_netmask)->sin6_addr); 554 } 555 if (af == AF_INET && net2 > 32) 556 net2 = 32; 557 if (flags & PFI_AFLAG_BROADCAST) 558 pfi_address_add(ia->ifa_broadaddr, af, net2); 559 else if (flags & PFI_AFLAG_PEER) 560 pfi_address_add(ia->ifa_dstaddr, af, net2); 561 else 562 pfi_address_add(ia->ifa_addr, af, net2); 563 } 564 } 565 566 void 567 pfi_address_add(struct sockaddr *sa, int af, int net) 568 { 569 struct pfr_addr *p; 570 int i; 571 572 if (pfi_buffer_cnt >= pfi_buffer_max) { 573 int new_max = pfi_buffer_max * 2; 574 575 if (new_max > PFI_BUFFER_MAX) { 576 printf("pfi_address_add: address buffer full (%d/%d)\n", 577 pfi_buffer_cnt, PFI_BUFFER_MAX); 578 return; 579 } 580 p = malloc(new_max * sizeof(*pfi_buffer), PFI_MTYPE, M_NOWAIT); 581 if (p == NULL) { 582 printf("pfi_address_add: no memory to grow buffer " 583 "(%d/%d)\n", pfi_buffer_cnt, PFI_BUFFER_MAX); 584 return; 585 } 586 memcpy(p, pfi_buffer, pfi_buffer_cnt * sizeof(*pfi_buffer)); 587 /* no need to zero buffer */ 588 free(pfi_buffer, PFI_MTYPE); 589 pfi_buffer = p; 590 pfi_buffer_max = new_max; 591 } 592 if (af == AF_INET && net > 32) 593 net = 128; 594 p = pfi_buffer + pfi_buffer_cnt++; 595 bzero(p, sizeof(*p)); 596 p->pfra_af = af; 597 p->pfra_net = net; 598 if (af == AF_INET) 599 p->pfra_ip4addr = ((struct sockaddr_in *)sa)->sin_addr; 600 else if (af == AF_INET6) { 601 p->pfra_ip6addr = ((struct sockaddr_in6 *)sa)->sin6_addr; 602 if (IN6_IS_SCOPE_EMBEDDABLE(&p->pfra_ip6addr)) 603 p->pfra_ip6addr.s6_addr16[1] = 0; 604 } 605 /* mask network address bits */ 606 if (net < 128) 607 ((char *)p)[p->pfra_net/8] &= ~(0xFF >> (p->pfra_net%8)); 608 for (i = (p->pfra_net+7)/8; i < sizeof(p->pfra_u); i++) 609 ((char *)p)[i] = 0; 610 } 611 612 void 613 pfi_dynaddr_remove(struct pf_addr_wrap *aw) 614 { 615 int s; 616 617 if (aw->type != PF_ADDR_DYNIFTL || aw->p.dyn == NULL || 618 aw->p.dyn->pfid_kif == NULL || aw->p.dyn->pfid_kt == NULL) 619 return; 620 621 s = splsoftnet(); 622 TAILQ_REMOVE(&aw->p.dyn->pfid_kif->pfik_dynaddrs, aw->p.dyn, entry); 623 pfi_kif_unref(aw->p.dyn->pfid_kif, PFI_KIF_REF_RULE); 624 aw->p.dyn->pfid_kif = NULL; 625 pfr_detach_table(aw->p.dyn->pfid_kt); 626 aw->p.dyn->pfid_kt = NULL; 627 pool_put(&pfi_addr_pl, aw->p.dyn); 628 aw->p.dyn = NULL; 629 splx(s); 630 } 631 632 void 633 pfi_dynaddr_copyout(struct pf_addr_wrap *aw) 634 { 635 if (aw->type != PF_ADDR_DYNIFTL || aw->p.dyn == NULL || 636 aw->p.dyn->pfid_kif == NULL) 637 return; 638 aw->p.dyncnt = aw->p.dyn->pfid_acnt4 + aw->p.dyn->pfid_acnt6; 639 } 640 641 void 642 pfi_kifaddr_update(void *v) 643 { 644 int s; 645 struct pfi_kif *kif = (struct pfi_kif *)v; 646 647 s = splsoftnet(); 648 pfi_update++; 649 pfi_kif_update(kif); 650 splx(s); 651 } 652 653 int 654 pfi_if_compare(struct pfi_kif *p, struct pfi_kif *q) 655 { 656 return (strncmp(p->pfik_name, q->pfik_name, IFNAMSIZ)); 657 } 658 659 void 660 pfi_fill_oldstatus(struct pf_status *pfs) 661 { 662 struct pfi_kif *p; 663 struct pfi_kif_cmp key; 664 int i, j, k, s; 665 666 strlcpy(key.pfik_name, pfs->ifname, sizeof(key.pfik_name)); 667 s = splsoftnet(); 668 p = RB_FIND(pfi_ifhead, &pfi_ifs, (struct pfi_kif *)&key); 669 if (p == NULL) { 670 splx(s); 671 return; 672 } 673 bzero(pfs->pcounters, sizeof(pfs->pcounters)); 674 bzero(pfs->bcounters, sizeof(pfs->bcounters)); 675 for (i = 0; i < 2; i++) 676 for (j = 0; j < 2; j++) 677 for (k = 0; k < 2; k++) { 678 pfs->pcounters[i][j][k] = 679 p->pfik_packets[i][j][k]; 680 pfs->bcounters[i][j] += 681 p->pfik_bytes[i][j][k]; 682 } 683 splx(s); 684 } 685 686 int 687 pfi_clr_istats(const char *name) 688 { 689 struct pfi_kif *p; 690 int s; 691 692 s = splsoftnet(); 693 RB_FOREACH(p, pfi_ifhead, &pfi_ifs) { 694 if (pfi_skip_if(name, p)) 695 continue; 696 bzero(p->pfik_packets, sizeof(p->pfik_packets)); 697 bzero(p->pfik_bytes, sizeof(p->pfik_bytes)); 698 p->pfik_tzero = time_second; 699 } 700 splx(s); 701 702 return (0); 703 } 704 705 int 706 pfi_get_ifaces(const char *name, struct pfi_kif *buf, int *size) 707 { 708 struct pfi_kif *p, *nextp; 709 int s, n = 0; 710 711 s = splsoftnet(); 712 for (p = RB_MIN(pfi_ifhead, &pfi_ifs); p; p = nextp) { 713 nextp = RB_NEXT(pfi_ifhead, &pfi_ifs, p); 714 if (pfi_skip_if(name, p)) 715 continue; 716 if (*size > n++) { 717 if (!p->pfik_tzero) 718 p->pfik_tzero = time_second; 719 pfi_kif_ref(p, PFI_KIF_REF_RULE); 720 if (copyout(p, buf++, sizeof(*buf))) { 721 pfi_kif_unref(p, PFI_KIF_REF_RULE); 722 splx(s); 723 return (EFAULT); 724 } 725 nextp = RB_NEXT(pfi_ifhead, &pfi_ifs, p); 726 pfi_kif_unref(p, PFI_KIF_REF_RULE); 727 } 728 } 729 splx(s); 730 *size = n; 731 return (0); 732 } 733 734 int 735 pfi_skip_if(const char *filter, struct pfi_kif *p) 736 { 737 int n; 738 739 if (filter == NULL || !*filter) 740 return (0); 741 if (!strcmp(p->pfik_name, filter)) 742 return (0); /* exact match */ 743 n = strlen(filter); 744 if (n < 1 || n >= IFNAMSIZ) 745 return (1); /* sanity check */ 746 if (filter[n-1] >= '0' && filter[n-1] <= '9') 747 return (1); /* only do exact match in that case */ 748 if (strncmp(p->pfik_name, filter, n)) 749 return (1); /* prefix doesn't match */ 750 return (p->pfik_name[n] < '0' || p->pfik_name[n] > '9'); 751 } 752 753 int 754 pfi_set_flags(const char *name, int flags) 755 { 756 struct pfi_kif *p; 757 int s; 758 759 s = splsoftnet(); 760 RB_FOREACH(p, pfi_ifhead, &pfi_ifs) { 761 if (pfi_skip_if(name, p)) 762 continue; 763 p->pfik_flags |= flags; 764 } 765 splx(s); 766 return (0); 767 } 768 769 int 770 pfi_clear_flags(const char *name, int flags) 771 { 772 struct pfi_kif *p; 773 int s; 774 775 s = splsoftnet(); 776 RB_FOREACH(p, pfi_ifhead, &pfi_ifs) { 777 if (pfi_skip_if(name, p)) 778 continue; 779 p->pfik_flags &= ~flags; 780 } 781 splx(s); 782 return (0); 783 } 784 785 /* from pf_print_state.c */ 786 int 787 pfi_unmask(void *addr) 788 { 789 struct pf_addr *m = addr; 790 int i = 31, j = 0, b = 0; 791 u_int32_t tmp; 792 793 while (j < 4 && m->addr32[j] == 0xffffffff) { 794 b += 32; 795 j++; 796 } 797 if (j < 4) { 798 tmp = ntohl(m->addr32[j]); 799 for (i = 31; tmp & (1 << i); --i) 800 b++; 801 } 802 return (b); 803 } 804 805 #ifdef __NetBSD__ 806 static void 807 pfi_copy_group(char *dest, const char *src, ssize_t sz) 808 { 809 while (sz > 1 && *src && !(*src >= '0' && *src <= '9')) { 810 *dest++ = *src++; 811 sz--; 812 } 813 if (sz > 0) 814 *dest++ = '\0'; 815 } 816 817 void 818 pfi_init_groups(struct ifnet *ifp) 819 { 820 char group[IFNAMSIZ]; 821 822 if_init_groups(ifp); 823 if_addgroup(ifp, IFG_ALL); 824 825 pfi_copy_group(group, ifp->if_xname, sizeof(group)); 826 if_addgroup(ifp, group); 827 } 828 829 void 830 pfi_destroy_groups(struct ifnet *ifp) 831 { 832 char group[IFNAMSIZ]; 833 834 pfi_copy_group(group, ifp->if_xname, sizeof(group)); 835 if_delgroup(ifp, group); 836 837 if_delgroup(ifp, IFG_ALL); 838 if_destroy_groups(ifp); 839 } 840 841 int 842 pfil_ifnet_wrapper(void *arg, struct mbuf **mp, struct ifnet *ifp, int dir) 843 { 844 u_long cmd = (u_long)mp; 845 846 switch (cmd) { 847 case PFIL_IFNET_ATTACH: 848 pfi_init_groups(ifp); 849 850 pfi_attach_ifnet(ifp); 851 break; 852 case PFIL_IFNET_DETACH: 853 pfi_detach_ifnet(ifp); 854 855 pfi_destroy_groups(ifp); 856 break; 857 default: 858 panic("pfil_ifnet_wrapper: unexpected cmd %lu", cmd); 859 } 860 861 return (0); 862 } 863 864 int 865 pfil_ifaddr_wrapper(void *arg, struct mbuf **mp, struct ifnet *ifp, int dir) 866 { 867 u_long cmd = (u_long)mp; 868 869 switch (cmd) { 870 case SIOCSIFADDR: 871 case SIOCAIFADDR: 872 case SIOCDIFADDR: 873 #ifdef INET6 874 case SIOCAIFADDR_IN6: 875 case SIOCDIFADDR_IN6: 876 #endif /* INET6 */ 877 pfi_kifaddr_update(ifp->if_pf_kif); 878 break; 879 default: 880 panic("pfil_ifaddr_wrapper: unexpected ioctl %lu", cmd); 881 } 882 883 return (0); 884 } 885 #endif /* __NetBSD__ */ 886
Indexes created Fri Sep 26 20:09:58 GMT 2025