pf_if.c revision 1.26
1 /* $NetBSD: pf_if.c,v 1.26 2014/05/17 21:00:33 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 1.26 2014/05/17 21:00:33 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 ifnet_t *ifp; 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_FOREACH(ifp) { 143 pfi_detach_ifnet(ifp); 144 pfi_destroy_groups(ifp); 145 } 146 147 while ((p = RB_MIN(pfi_ifhead, &pfi_ifs))) { 148 RB_REMOVE(pfi_ifhead, &pfi_ifs, p); 149 free(p, PFI_MTYPE); 150 } 151 152 pool_destroy(&pfi_addr_pl); 153 154 free(pfi_buffer, PFI_MTYPE); 155 } 156 #endif /* _MODULE */ 157 158 struct pfi_kif * 159 pfi_kif_get(const char *kif_name) 160 { 161 struct pfi_kif *kif; 162 struct pfi_kif_cmp s; 163 164 bzero(&s, sizeof(s)); 165 strlcpy(s.pfik_name, kif_name, sizeof(s.pfik_name)); 166 if ((kif = RB_FIND(pfi_ifhead, &pfi_ifs, (struct pfi_kif *)&s)) != NULL) 167 return (kif); 168 169 /* create new one */ 170 if ((kif = malloc(sizeof(*kif), PFI_MTYPE, M_NOWAIT|M_ZERO)) == NULL) 171 return (NULL); 172 173 strlcpy(kif->pfik_name, kif_name, sizeof(kif->pfik_name)); 174 #ifdef __NetBSD__ 175 /* time_second is not valid yet */ 176 kif->pfik_tzero = (time_second > 7200) ? time_second : 0; 177 #else 178 kif->pfik_tzero = time_second; 179 #endif /* !__NetBSD__ */ 180 TAILQ_INIT(&kif->pfik_dynaddrs); 181 182 RB_INSERT(pfi_ifhead, &pfi_ifs, kif); 183 return (kif); 184 } 185 186 void 187 pfi_kif_ref(struct pfi_kif *kif, enum pfi_kif_refs what) 188 { 189 switch (what) { 190 case PFI_KIF_REF_RULE: 191 kif->pfik_rules++; 192 break; 193 case PFI_KIF_REF_STATE: 194 kif->pfik_states++; 195 break; 196 default: 197 panic("pfi_kif_ref with unknown type"); 198 } 199 } 200 201 void 202 pfi_kif_unref(struct pfi_kif *kif, enum pfi_kif_refs what) 203 { 204 if (kif == NULL) 205 return; 206 207 switch (what) { 208 case PFI_KIF_REF_NONE: 209 break; 210 case PFI_KIF_REF_RULE: 211 if (kif->pfik_rules <= 0) { 212 printf("pfi_kif_unref: rules refcount <= 0\n"); 213 return; 214 } 215 kif->pfik_rules--; 216 break; 217 case PFI_KIF_REF_STATE: 218 if (kif->pfik_states <= 0) { 219 printf("pfi_kif_unref: state refcount <= 0\n"); 220 return; 221 } 222 kif->pfik_states--; 223 break; 224 default: 225 panic("pfi_kif_unref with unknown type"); 226 } 227 228 if (kif->pfik_ifp != NULL || kif->pfik_group != NULL || kif == pfi_all) 229 return; 230 231 if (kif->pfik_rules || kif->pfik_states) 232 return; 233 234 RB_REMOVE(pfi_ifhead, &pfi_ifs, kif); 235 free(kif, PFI_MTYPE); 236 } 237 238 int 239 pfi_kif_match(struct pfi_kif *rule_kif, struct pfi_kif *packet_kif) 240 { 241 struct ifg_list *p; 242 243 if (rule_kif == NULL || rule_kif == packet_kif) 244 return (1); 245 246 if (rule_kif->pfik_group != NULL) { 247 struct ifg_list_head *ifgh = 248 if_get_groups(packet_kif->pfik_ifp); 249 250 TAILQ_FOREACH(p, ifgh, ifgl_next) 251 if (p->ifgl_group == rule_kif->pfik_group) 252 return (1); 253 } 254 255 return (0); 256 } 257 258 void 259 pfi_attach_ifnet(struct ifnet *ifp) 260 { 261 struct pfi_kif *kif; 262 int s; 263 264 pfi_initialize(); 265 s = splsoftnet(); 266 pfi_update++; 267 if ((kif = pfi_kif_get(ifp->if_xname)) == NULL) 268 panic("pfi_kif_get failed"); 269 270 kif->pfik_ifp = ifp; 271 ifp->if_pf_kif = kif; 272 273 #ifndef __NetBSD__ 274 if ((kif->pfik_ah_cookie = hook_establish(ifp->if_addrhooks, 1, 275 pfi_kifaddr_update, kif)) == NULL) 276 panic("pfi_attach_ifnet: cannot allocate '%s' address hook", 277 ifp->if_xname); 278 #endif /* !__NetBSD__ */ 279 280 pfi_kif_update(kif); 281 282 splx(s); 283 } 284 285 void 286 pfi_detach_ifnet(struct ifnet *ifp) 287 { 288 int s; 289 struct pfi_kif *kif; 290 291 if ((kif = (struct pfi_kif *)ifp->if_pf_kif) == NULL) 292 return; 293 294 s = splsoftnet(); 295 pfi_update++; 296 #ifndef __NetBSD__ 297 hook_disestablish(ifp->if_addrhooks, kif->pfik_ah_cookie); 298 #endif /* !__NetBSD__ */ 299 pfi_kif_update(kif); 300 301 kif->pfik_ifp = NULL; 302 ifp->if_pf_kif = NULL; 303 pfi_kif_unref(kif, PFI_KIF_REF_NONE); 304 splx(s); 305 } 306 307 void 308 pfi_attach_ifgroup(struct ifg_group *ifg) 309 { 310 struct pfi_kif *kif; 311 int s; 312 313 pfi_initialize(); 314 s = splsoftnet(); 315 pfi_update++; 316 if ((kif = pfi_kif_get(ifg->ifg_group)) == NULL) 317 panic("pfi_kif_get failed"); 318 319 kif->pfik_group = ifg; 320 ifg->ifg_pf_kif = kif; 321 322 splx(s); 323 } 324 325 void 326 pfi_detach_ifgroup(struct ifg_group *ifg) 327 { 328 int s; 329 struct pfi_kif *kif; 330 331 if ((kif = (struct pfi_kif *)ifg->ifg_pf_kif) == NULL) 332 return; 333 334 s = splsoftnet(); 335 pfi_update++; 336 337 kif->pfik_group = NULL; 338 ifg->ifg_pf_kif = NULL; 339 pfi_kif_unref(kif, PFI_KIF_REF_NONE); 340 splx(s); 341 } 342 343 void 344 pfi_group_change(const char *group) 345 { 346 struct pfi_kif *kif; 347 int s; 348 349 s = splsoftnet(); 350 pfi_update++; 351 if ((kif = pfi_kif_get(group)) == NULL) 352 panic("pfi_kif_get failed"); 353 354 pfi_kif_update(kif); 355 356 splx(s); 357 } 358 359 int 360 pfi_match_addr(struct pfi_dynaddr *dyn, struct pf_addr *a, sa_family_t af) 361 { 362 switch (af) { 363 #ifdef INET 364 case AF_INET: 365 switch (dyn->pfid_acnt4) { 366 case 0: 367 return (0); 368 case 1: 369 return (PF_MATCHA(0, &dyn->pfid_addr4, 370 &dyn->pfid_mask4, a, AF_INET)); 371 default: 372 return (pfr_match_addr(dyn->pfid_kt, a, AF_INET)); 373 } 374 break; 375 #endif /* INET */ 376 #ifdef INET6 377 case AF_INET6: 378 switch (dyn->pfid_acnt6) { 379 case 0: 380 return (0); 381 case 1: 382 return (PF_MATCHA(0, &dyn->pfid_addr6, 383 &dyn->pfid_mask6, a, AF_INET6)); 384 default: 385 return (pfr_match_addr(dyn->pfid_kt, a, AF_INET6)); 386 } 387 break; 388 #endif /* INET6 */ 389 default: 390 return (0); 391 } 392 } 393 394 int 395 pfi_dynaddr_setup(struct pf_addr_wrap *aw, sa_family_t af) 396 { 397 struct pfi_dynaddr *dyn; 398 char tblname[PF_TABLE_NAME_SIZE]; 399 struct pf_ruleset *ruleset = NULL; 400 int s, rv = 0; 401 402 if (aw->type != PF_ADDR_DYNIFTL) 403 return (0); 404 if ((dyn = pool_get(&pfi_addr_pl, PR_NOWAIT)) == NULL) 405 return (1); 406 bzero(dyn, sizeof(*dyn)); 407 408 s = splsoftnet(); 409 if (!strcmp(aw->v.ifname, "self")) 410 dyn->pfid_kif = pfi_kif_get(IFG_ALL); 411 else 412 dyn->pfid_kif = pfi_kif_get(aw->v.ifname); 413 if (dyn->pfid_kif == NULL) { 414 rv = 1; 415 goto _bad; 416 } 417 pfi_kif_ref(dyn->pfid_kif, PFI_KIF_REF_RULE); 418 419 dyn->pfid_net = pfi_unmask(&aw->v.a.mask); 420 if (af == AF_INET && dyn->pfid_net == 32) 421 dyn->pfid_net = 128; 422 strlcpy(tblname, aw->v.ifname, sizeof(tblname)); 423 if (aw->iflags & PFI_AFLAG_NETWORK) 424 strlcat(tblname, ":network", sizeof(tblname)); 425 if (aw->iflags & PFI_AFLAG_BROADCAST) 426 strlcat(tblname, ":broadcast", sizeof(tblname)); 427 if (aw->iflags & PFI_AFLAG_PEER) 428 strlcat(tblname, ":peer", sizeof(tblname)); 429 if (aw->iflags & PFI_AFLAG_NOALIAS) 430 strlcat(tblname, ":0", sizeof(tblname)); 431 if (dyn->pfid_net != 128) 432 snprintf(tblname + strlen(tblname), 433 sizeof(tblname) - strlen(tblname), "/%d", dyn->pfid_net); 434 if ((ruleset = pf_find_or_create_ruleset(PF_RESERVED_ANCHOR)) == NULL) { 435 rv = 1; 436 goto _bad; 437 } 438 439 if ((dyn->pfid_kt = pfr_attach_table(ruleset, tblname)) == NULL) { 440 rv = 1; 441 goto _bad; 442 } 443 444 dyn->pfid_kt->pfrkt_flags |= PFR_TFLAG_ACTIVE; 445 dyn->pfid_iflags = aw->iflags; 446 dyn->pfid_af = af; 447 448 TAILQ_INSERT_TAIL(&dyn->pfid_kif->pfik_dynaddrs, dyn, entry); 449 aw->p.dyn = dyn; 450 pfi_kif_update(dyn->pfid_kif); 451 splx(s); 452 return (0); 453 454 _bad: 455 if (dyn->pfid_kt != NULL) 456 pfr_detach_table(dyn->pfid_kt); 457 if (ruleset != NULL) 458 pf_remove_if_empty_ruleset(ruleset); 459 if (dyn->pfid_kif != NULL) 460 pfi_kif_unref(dyn->pfid_kif, PFI_KIF_REF_RULE); 461 pool_put(&pfi_addr_pl, dyn); 462 splx(s); 463 return (rv); 464 } 465 466 void 467 pfi_kif_update(struct pfi_kif *kif) 468 { 469 struct ifg_list *ifgl; 470 struct pfi_dynaddr *p; 471 472 /* update all dynaddr */ 473 TAILQ_FOREACH(p, &kif->pfik_dynaddrs, entry) 474 pfi_dynaddr_update(p); 475 476 /* again for all groups kif is member of */ 477 if (kif->pfik_ifp != NULL) { 478 struct ifg_list_head *ifgh = if_get_groups(kif->pfik_ifp); 479 480 TAILQ_FOREACH(ifgl, ifgh, ifgl_next) 481 pfi_kif_update((struct pfi_kif *) 482 ifgl->ifgl_group->ifg_pf_kif); 483 } 484 } 485 486 void 487 pfi_dynaddr_update(struct pfi_dynaddr *dyn) 488 { 489 struct pfi_kif *kif; 490 struct pfr_ktable *kt; 491 492 if (dyn == NULL || dyn->pfid_kif == NULL || dyn->pfid_kt == NULL) 493 panic("pfi_dynaddr_update"); 494 495 kif = dyn->pfid_kif; 496 kt = dyn->pfid_kt; 497 498 if (kt->pfrkt_larg != pfi_update) { 499 /* this table needs to be brought up-to-date */ 500 pfi_table_update(kt, kif, dyn->pfid_net, dyn->pfid_iflags); 501 kt->pfrkt_larg = pfi_update; 502 } 503 pfr_dynaddr_update(kt, dyn); 504 } 505 506 void 507 pfi_table_update(struct pfr_ktable *kt, struct pfi_kif *kif, int net, int flags) 508 { 509 int e, size2 = 0; 510 struct ifg_member *ifgm; 511 512 pfi_buffer_cnt = 0; 513 514 if (kif->pfik_ifp != NULL) 515 pfi_instance_add(kif->pfik_ifp, net, flags); 516 else if (kif->pfik_group != NULL) 517 TAILQ_FOREACH(ifgm, &kif->pfik_group->ifg_members, ifgm_next) 518 pfi_instance_add(ifgm->ifgm_ifp, net, flags); 519 520 if ((e = pfr_set_addrs(&kt->pfrkt_t, pfi_buffer, pfi_buffer_cnt, &size2, 521 NULL, NULL, NULL, 0, PFR_TFLAG_ALLMASK))) 522 printf("pfi_table_update: cannot set %d new addresses " 523 "into table %s: %d\n", pfi_buffer_cnt, kt->pfrkt_name, e); 524 } 525 526 void 527 pfi_instance_add(struct ifnet *ifp, int net, int flags) 528 { 529 struct ifaddr *ia; 530 int got4 = 0, got6 = 0; 531 int net2, af; 532 533 if (ifp == NULL) 534 return; 535 IFADDR_FOREACH(ia, ifp) { 536 if (ia->ifa_addr == NULL) 537 continue; 538 af = ia->ifa_addr->sa_family; 539 if (af != AF_INET && af != AF_INET6) 540 continue; 541 if ((flags & PFI_AFLAG_BROADCAST) && af == AF_INET6) 542 continue; 543 if ((flags & PFI_AFLAG_BROADCAST) && 544 !(ifp->if_flags & IFF_BROADCAST)) 545 continue; 546 if ((flags & PFI_AFLAG_PEER) && 547 !(ifp->if_flags & IFF_POINTOPOINT)) 548 continue; 549 if ((flags & PFI_AFLAG_NETWORK) && af == AF_INET6 && 550 IN6_IS_ADDR_LINKLOCAL( 551 &((struct sockaddr_in6 *)ia->ifa_addr)->sin6_addr)) 552 continue; 553 if (flags & PFI_AFLAG_NOALIAS) { 554 if (af == AF_INET && got4) 555 continue; 556 if (af == AF_INET6 && got6) 557 continue; 558 } 559 if (af == AF_INET) 560 got4 = 1; 561 else if (af == AF_INET6) 562 got6 = 1; 563 net2 = net; 564 if (net2 == 128 && (flags & PFI_AFLAG_NETWORK)) { 565 if (af == AF_INET) 566 net2 = pfi_unmask(&((struct sockaddr_in *) 567 ia->ifa_netmask)->sin_addr); 568 else if (af == AF_INET6) 569 net2 = pfi_unmask(&((struct sockaddr_in6 *) 570 ia->ifa_netmask)->sin6_addr); 571 } 572 if (af == AF_INET && net2 > 32) 573 net2 = 32; 574 if (flags & PFI_AFLAG_BROADCAST) 575 pfi_address_add(ia->ifa_broadaddr, af, net2); 576 else if (flags & PFI_AFLAG_PEER) 577 pfi_address_add(ia->ifa_dstaddr, af, net2); 578 else 579 pfi_address_add(ia->ifa_addr, af, net2); 580 } 581 } 582 583 void 584 pfi_address_add(struct sockaddr *sa, int af, int net) 585 { 586 struct pfr_addr *p; 587 int i; 588 589 if (pfi_buffer_cnt >= pfi_buffer_max) { 590 int new_max = pfi_buffer_max * 2; 591 592 if (new_max > PFI_BUFFER_MAX) { 593 printf("pfi_address_add: address buffer full (%d/%d)\n", 594 pfi_buffer_cnt, PFI_BUFFER_MAX); 595 return; 596 } 597 p = malloc(new_max * sizeof(*pfi_buffer), PFI_MTYPE, M_NOWAIT); 598 if (p == NULL) { 599 printf("pfi_address_add: no memory to grow buffer " 600 "(%d/%d)\n", pfi_buffer_cnt, PFI_BUFFER_MAX); 601 return; 602 } 603 memcpy(p, pfi_buffer, pfi_buffer_cnt * sizeof(*pfi_buffer)); 604 /* no need to zero buffer */ 605 free(pfi_buffer, PFI_MTYPE); 606 pfi_buffer = p; 607 pfi_buffer_max = new_max; 608 } 609 if (af == AF_INET && net > 32) 610 net = 128; 611 p = pfi_buffer + pfi_buffer_cnt++; 612 bzero(p, sizeof(*p)); 613 p->pfra_af = af; 614 p->pfra_net = net; 615 if (af == AF_INET) 616 p->pfra_ip4addr = ((struct sockaddr_in *)sa)->sin_addr; 617 else if (af == AF_INET6) { 618 p->pfra_ip6addr = ((struct sockaddr_in6 *)sa)->sin6_addr; 619 if (IN6_IS_SCOPE_EMBEDDABLE(&p->pfra_ip6addr)) 620 p->pfra_ip6addr.s6_addr16[1] = 0; 621 } 622 /* mask network address bits */ 623 if (net < 128) 624 ((char *)p)[p->pfra_net/8] &= ~(0xFF >> (p->pfra_net%8)); 625 for (i = (p->pfra_net+7)/8; i < sizeof(p->pfra_u); i++) 626 ((char *)p)[i] = 0; 627 } 628 629 void 630 pfi_dynaddr_remove(struct pf_addr_wrap *aw) 631 { 632 int s; 633 634 if (aw->type != PF_ADDR_DYNIFTL || aw->p.dyn == NULL || 635 aw->p.dyn->pfid_kif == NULL || aw->p.dyn->pfid_kt == NULL) 636 return; 637 638 s = splsoftnet(); 639 TAILQ_REMOVE(&aw->p.dyn->pfid_kif->pfik_dynaddrs, aw->p.dyn, entry); 640 pfi_kif_unref(aw->p.dyn->pfid_kif, PFI_KIF_REF_RULE); 641 aw->p.dyn->pfid_kif = NULL; 642 pfr_detach_table(aw->p.dyn->pfid_kt); 643 aw->p.dyn->pfid_kt = NULL; 644 pool_put(&pfi_addr_pl, aw->p.dyn); 645 aw->p.dyn = NULL; 646 splx(s); 647 } 648 649 void 650 pfi_dynaddr_copyout(struct pf_addr_wrap *aw) 651 { 652 if (aw->type != PF_ADDR_DYNIFTL || aw->p.dyn == NULL || 653 aw->p.dyn->pfid_kif == NULL) 654 return; 655 aw->p.dyncnt = aw->p.dyn->pfid_acnt4 + aw->p.dyn->pfid_acnt6; 656 } 657 658 void 659 pfi_kifaddr_update(void *v) 660 { 661 int s; 662 struct pfi_kif *kif = (struct pfi_kif *)v; 663 664 s = splsoftnet(); 665 pfi_update++; 666 pfi_kif_update(kif); 667 splx(s); 668 } 669 670 int 671 pfi_if_compare(struct pfi_kif *p, struct pfi_kif *q) 672 { 673 return (strncmp(p->pfik_name, q->pfik_name, IFNAMSIZ)); 674 } 675 676 void 677 pfi_fill_oldstatus(struct pf_status *pfs) 678 { 679 struct pfi_kif *p; 680 struct pfi_kif_cmp key; 681 int i, j, k, s; 682 683 strlcpy(key.pfik_name, pfs->ifname, sizeof(key.pfik_name)); 684 s = splsoftnet(); 685 p = RB_FIND(pfi_ifhead, &pfi_ifs, (struct pfi_kif *)&key); 686 if (p == NULL) { 687 splx(s); 688 return; 689 } 690 bzero(pfs->pcounters, sizeof(pfs->pcounters)); 691 bzero(pfs->bcounters, sizeof(pfs->bcounters)); 692 for (i = 0; i < 2; i++) 693 for (j = 0; j < 2; j++) 694 for (k = 0; k < 2; k++) { 695 pfs->pcounters[i][j][k] = 696 p->pfik_packets[i][j][k]; 697 pfs->bcounters[i][j] += 698 p->pfik_bytes[i][j][k]; 699 } 700 splx(s); 701 } 702 703 int 704 pfi_clr_istats(const char *name) 705 { 706 struct pfi_kif *p; 707 int s; 708 709 s = splsoftnet(); 710 RB_FOREACH(p, pfi_ifhead, &pfi_ifs) { 711 if (pfi_skip_if(name, p)) 712 continue; 713 bzero(p->pfik_packets, sizeof(p->pfik_packets)); 714 bzero(p->pfik_bytes, sizeof(p->pfik_bytes)); 715 p->pfik_tzero = time_second; 716 } 717 splx(s); 718 719 return (0); 720 } 721 722 int 723 pfi_get_ifaces(const char *name, struct pfi_kif *buf, int *size) 724 { 725 struct pfi_kif *p, *nextp; 726 int s, n = 0; 727 728 s = splsoftnet(); 729 for (p = RB_MIN(pfi_ifhead, &pfi_ifs); p; p = nextp) { 730 nextp = RB_NEXT(pfi_ifhead, &pfi_ifs, p); 731 if (pfi_skip_if(name, p)) 732 continue; 733 if (*size > n++) { 734 if (!p->pfik_tzero) 735 p->pfik_tzero = time_second; 736 pfi_kif_ref(p, PFI_KIF_REF_RULE); 737 if (copyout(p, buf++, sizeof(*buf))) { 738 pfi_kif_unref(p, PFI_KIF_REF_RULE); 739 splx(s); 740 return (EFAULT); 741 } 742 nextp = RB_NEXT(pfi_ifhead, &pfi_ifs, p); 743 pfi_kif_unref(p, PFI_KIF_REF_RULE); 744 } 745 } 746 splx(s); 747 *size = n; 748 return (0); 749 } 750 751 int 752 pfi_skip_if(const char *filter, struct pfi_kif *p) 753 { 754 int n; 755 756 if (filter == NULL || !*filter) 757 return (0); 758 if (!strcmp(p->pfik_name, filter)) 759 return (0); /* exact match */ 760 n = strlen(filter); 761 if (n < 1 || n >= IFNAMSIZ) 762 return (1); /* sanity check */ 763 if (filter[n-1] >= '0' && filter[n-1] <= '9') 764 return (1); /* only do exact match in that case */ 765 if (strncmp(p->pfik_name, filter, n)) 766 return (1); /* prefix doesn't match */ 767 return (p->pfik_name[n] < '0' || p->pfik_name[n] > '9'); 768 } 769 770 int 771 pfi_set_flags(const char *name, int flags) 772 { 773 struct pfi_kif *p; 774 int s; 775 776 s = splsoftnet(); 777 RB_FOREACH(p, pfi_ifhead, &pfi_ifs) { 778 if (pfi_skip_if(name, p)) 779 continue; 780 p->pfik_flags |= flags; 781 } 782 splx(s); 783 return (0); 784 } 785 786 int 787 pfi_clear_flags(const char *name, int flags) 788 { 789 struct pfi_kif *p; 790 int s; 791 792 s = splsoftnet(); 793 RB_FOREACH(p, pfi_ifhead, &pfi_ifs) { 794 if (pfi_skip_if(name, p)) 795 continue; 796 p->pfik_flags &= ~flags; 797 } 798 splx(s); 799 return (0); 800 } 801 802 /* from pf_print_state.c */ 803 int 804 pfi_unmask(void *addr) 805 { 806 struct pf_addr *m = addr; 807 int i = 31, j = 0, b = 0; 808 u_int32_t tmp; 809 810 while (j < 4 && m->addr32[j] == 0xffffffff) { 811 b += 32; 812 j++; 813 } 814 if (j < 4) { 815 tmp = ntohl(m->addr32[j]); 816 for (i = 31; tmp & (1 << i); --i) 817 b++; 818 } 819 return (b); 820 } 821 822 #ifdef __NetBSD__ 823 static void 824 pfi_copy_group(char *dest, const char *src, ssize_t sz) 825 { 826 while (sz > 1 && *src && !(*src >= '0' && *src <= '9')) { 827 *dest++ = *src++; 828 sz--; 829 } 830 if (sz > 0) 831 *dest++ = '\0'; 832 } 833 834 void 835 pfi_init_groups(struct ifnet *ifp) 836 { 837 char group[IFNAMSIZ]; 838 839 if_init_groups(ifp); 840 if_addgroup(ifp, IFG_ALL); 841 842 pfi_copy_group(group, ifp->if_xname, sizeof(group)); 843 if_addgroup(ifp, group); 844 } 845 846 void 847 pfi_destroy_groups(struct ifnet *ifp) 848 { 849 char group[IFNAMSIZ]; 850 851 pfi_copy_group(group, ifp->if_xname, sizeof(group)); 852 if_delgroup(ifp, group); 853 854 if_delgroup(ifp, IFG_ALL); 855 if_destroy_groups(ifp); 856 } 857 858 int 859 pfil_ifnet_wrapper(void *arg, struct mbuf **mp, struct ifnet *ifp, int dir) 860 { 861 u_long cmd = (u_long)mp; 862 863 switch (cmd) { 864 case PFIL_IFNET_ATTACH: 865 pfi_init_groups(ifp); 866 867 pfi_attach_ifnet(ifp); 868 break; 869 case PFIL_IFNET_DETACH: 870 pfi_detach_ifnet(ifp); 871 872 pfi_destroy_groups(ifp); 873 break; 874 default: 875 panic("pfil_ifnet_wrapper: unexpected cmd %lu", cmd); 876 } 877 878 return (0); 879 } 880 881 int 882 pfil_ifaddr_wrapper(void *arg, struct mbuf **mp, struct ifnet *ifp, int dir) 883 { 884 u_long cmd = (u_long)mp; 885 886 switch (cmd) { 887 case SIOCSIFADDR: 888 case SIOCAIFADDR: 889 case SIOCDIFADDR: 890 #ifdef INET6 891 case SIOCAIFADDR_IN6: 892 case SIOCDIFADDR_IN6: 893 #endif /* INET6 */ 894 pfi_kifaddr_update(ifp->if_pf_kif); 895 break; 896 default: 897 panic("pfil_ifaddr_wrapper: unexpected ioctl %lu", cmd); 898 } 899 900 return (0); 901 } 902 #endif /* __NetBSD__ */ 903
Indexes created Fri Sep 26 08:10:20 GMT 2025