1/* $NetBSD: pf_if.c,v 1.33 2017/03/14 09:03:08 ozaki-r 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@openbsd.org> 6 * Copyright 2005 Ryan McBride <mcbride@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 1.33 2017/03/14 09:03:08 ozaki-r 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 68struct pfi_kif *pfi_all = NULL; 69struct pool pfi_addr_pl; 70struct pfi_ifhead pfi_ifs; 71long pfi_update = 1; 72struct pfr_addr *pfi_buffer; 73int pfi_buffer_cnt; 74int pfi_buffer_max; 75 76void pfi_kif_update(struct pfi_kif *); 77void pfi_dynaddr_update(struct pfi_dynaddr *dyn); 78void pfi_table_update(struct pfr_ktable *, struct pfi_kif *, 79 int, int); 80void pfi_kifaddr_update(void *); 81void pfi_instance_add(struct ifnet *, int, int); 82void pfi_address_add(struct sockaddr *, int, int); 83int pfi_if_compare(struct pfi_kif *, struct pfi_kif *); 84int pfi_skip_if(const char *, struct pfi_kif *); 85int pfi_unmask(void *); 86#ifdef __NetBSD__ 87void pfi_init_groups(struct ifnet *); 88void pfi_destroy_groups(struct ifnet *); 89 90void pfil_ifnet_wrapper(void *, u_long, void *); 91void pfil_ifaddr_wrapper(void *, u_long, void *); 92#endif 93 94RB_PROTOTYPE(pfi_ifhead, pfi_kif, pfik_tree, pfi_if_compare); 95RB_GENERATE(pfi_ifhead, pfi_kif, pfik_tree, pfi_if_compare); 96 97#define PFI_BUFFER_MAX 0x10000 98#define PFI_MTYPE M_IFADDR 99 100void 101pfi_initialize(void) 102{ 103 int s; 104 int bound; 105 106 if (pfi_all != NULL) /* already initialized */ 107 return; 108 109#ifdef __NetBSD__ 110 pool_init(&pfi_addr_pl, sizeof(struct pfi_dynaddr), 0, 0, 0, 111 "pfiaddrpl", &pool_allocator_nointr, IPL_NONE); 112#else 113 pool_init(&pfi_addr_pl, sizeof(struct pfi_dynaddr), 0, 0, 0, 114 "pfiaddrpl", &pool_allocator_nointr); 115#endif /* !__NetBSD__ */ 116 pfi_buffer_max = 64; 117 pfi_buffer = malloc(pfi_buffer_max * sizeof(*pfi_buffer), 118 PFI_MTYPE, M_WAITOK); 119 120 if ((pfi_all = pfi_kif_get(IFG_ALL)) == NULL) 121 panic("pfi_kif_get for pfi_all failed"); 122 123#ifdef __NetBSD__ 124 ifnet_t *ifp; 125 bound = curlwp_bind(); 126 s = pserialize_read_enter(); 127 IFNET_READER_FOREACH(ifp) { 128 struct psref psref; 129 if_acquire(ifp, &psref); 130 pserialize_read_exit(s); 131 132 pfi_init_groups(ifp); 133 pfi_attach_ifnet(ifp); 134 135 s = pserialize_read_enter(); 136 if_release(ifp, &psref); 137 } 138 pserialize_read_exit(s); 139 curlwp_bindx(bound); 140 141 pfil_add_ihook(pfil_ifnet_wrapper, NULL, PFIL_IFNET, if_pfil); 142 pfil_add_ihook(pfil_ifaddr_wrapper, NULL, PFIL_IFADDR, if_pfil); 143#endif /* __NetBSD__ */ 144} 145 146#ifdef _MODULE 147void 148pfi_destroy(void) 149{ 150 struct pfi_kif *p; 151 ifnet_t *ifp; 152 int s; 153 int bound; 154 155 pfil_remove_ihook(pfil_ifaddr_wrapper, NULL, PFIL_IFADDR, if_pfil); 156 pfil_remove_ihook(pfil_ifnet_wrapper, NULL, PFIL_IFNET, if_pfil); 157 158 bound = curlwp_bind(); 159 s = pserialize_read_enter(); 160 IFNET_READER_FOREACH(ifp) { 161 struct psref psref; 162 if_acquire(ifp, &psref); 163 pserialize_read_exit(s); 164 165 pfi_detach_ifnet(ifp); 166 pfi_destroy_groups(ifp); 167 168 s = pserialize_read_enter(); 169 if_release(ifp, &psref); 170 } 171 pserialize_read_exit(s); 172 curlwp_bindx(bound); 173 174 while ((p = RB_MIN(pfi_ifhead, &pfi_ifs))) { 175 RB_REMOVE(pfi_ifhead, &pfi_ifs, p); 176 free(p, PFI_MTYPE); 177 } 178 179 pool_destroy(&pfi_addr_pl); 180 181 free(pfi_buffer, PFI_MTYPE); 182} 183#endif /* _MODULE */ 184 185struct pfi_kif * 186pfi_kif_get(const char *kif_name) 187{ 188 struct pfi_kif *kif; 189 struct pfi_kif_cmp s; 190 191 bzero(&s, sizeof(s)); 192 strlcpy(s.pfik_name, kif_name, sizeof(s.pfik_name)); 193 if ((kif = RB_FIND(pfi_ifhead, &pfi_ifs, (struct pfi_kif *)&s)) != NULL) 194 return (kif); 195 196 /* create new one */ 197 if ((kif = malloc(sizeof(*kif), PFI_MTYPE, M_NOWAIT|M_ZERO)) == NULL) 198 return (NULL); 199 200 strlcpy(kif->pfik_name, kif_name, sizeof(kif->pfik_name)); 201#ifdef __NetBSD__ 202 /* time_second is not valid yet */ 203 kif->pfik_tzero = (time_second > 7200) ? time_second : 0; 204#else 205 kif->pfik_tzero = time_second; 206#endif /* !__NetBSD__ */ 207 TAILQ_INIT(&kif->pfik_dynaddrs); 208 209 RB_INSERT(pfi_ifhead, &pfi_ifs, kif); 210 return (kif); 211} 212 213void 214pfi_kif_ref(struct pfi_kif *kif, enum pfi_kif_refs what) 215{ 216 switch (what) { 217 case PFI_KIF_REF_RULE: 218 kif->pfik_rules++; 219 break; 220 case PFI_KIF_REF_STATE: 221 kif->pfik_states++; 222 break; 223 default: 224 panic("pfi_kif_ref with unknown type"); 225 } 226} 227 228void 229pfi_kif_unref(struct pfi_kif *kif, enum pfi_kif_refs what) 230{ 231 if (kif == NULL) 232 return; 233 234 switch (what) { 235 case PFI_KIF_REF_NONE: 236 break; 237 case PFI_KIF_REF_RULE: 238 if (kif->pfik_rules <= 0) { 239 printf("pfi_kif_unref: rules refcount <= 0\n"); 240 return; 241 } 242 kif->pfik_rules--; 243 break; 244 case PFI_KIF_REF_STATE: 245 if (kif->pfik_states <= 0) { 246 printf("pfi_kif_unref: state refcount <= 0\n"); 247 return; 248 } 249 kif->pfik_states--; 250 break; 251 default: 252 panic("pfi_kif_unref with unknown type"); 253 } 254 255 if (kif->pfik_ifp != NULL || kif->pfik_group != NULL || kif == pfi_all) 256 return; 257 258 if (kif->pfik_rules || kif->pfik_states) 259 return; 260 261 RB_REMOVE(pfi_ifhead, &pfi_ifs, kif); 262 free(kif, PFI_MTYPE); 263} 264 265int 266pfi_kif_match(struct pfi_kif *rule_kif, struct pfi_kif *packet_kif) 267{ 268 struct ifg_list *p; 269 270 if (rule_kif == NULL || rule_kif == packet_kif) 271 return (1); 272 273 if (rule_kif->pfik_group != NULL) { 274 struct ifg_list_head *ifgh = 275 if_get_groups(packet_kif->pfik_ifp); 276 277 TAILQ_FOREACH(p, ifgh, ifgl_next) 278 if (p->ifgl_group == rule_kif->pfik_group) 279 return (1); 280 } 281 282 return (0); 283} 284 285void 286pfi_attach_ifnet(struct ifnet *ifp) 287{ 288 struct pfi_kif *kif; 289 int s; 290 291 pfi_initialize(); 292 s = splsoftnet(); 293 pfi_update++; 294 if ((kif = pfi_kif_get(ifp->if_xname)) == NULL) 295 panic("pfi_kif_get failed"); 296 297 kif->pfik_ifp = ifp; 298 ifp->if_pf_kif = kif; 299 300#ifndef __NetBSD__ 301 if ((kif->pfik_ah_cookie = hook_establish(ifp->if_addrhooks, 1, 302 pfi_kifaddr_update, kif)) == NULL) 303 panic("pfi_attach_ifnet: cannot allocate '%s' address hook", 304 ifp->if_xname); 305#endif /* !__NetBSD__ */ 306 307 pfi_kif_update(kif); 308 309 splx(s); 310} 311 312void 313pfi_detach_ifnet(struct ifnet *ifp) 314{ 315 int s; 316 struct pfi_kif *kif; 317 318 if ((kif = (struct pfi_kif *)ifp->if_pf_kif) == NULL) 319 return; 320 321 s = splsoftnet(); 322 pfi_update++; 323#ifndef __NetBSD__ 324 hook_disestablish(ifp->if_addrhooks, kif->pfik_ah_cookie); 325#endif /* !__NetBSD__ */ 326 pfi_kif_update(kif); 327 328 kif->pfik_ifp = NULL; 329 ifp->if_pf_kif = NULL; 330 pfi_kif_unref(kif, PFI_KIF_REF_NONE); 331 splx(s); 332} 333 334void 335pfi_attach_ifgroup(struct ifg_group *ifg) 336{ 337 struct pfi_kif *kif; 338 int s; 339 340 pfi_initialize(); 341 s = splsoftnet(); 342 pfi_update++; 343 if ((kif = pfi_kif_get(ifg->ifg_group)) == NULL) 344 panic("pfi_kif_get failed"); 345 346 kif->pfik_group = ifg; 347 ifg->ifg_pf_kif = kif; 348 349 splx(s); 350} 351 352void 353pfi_detach_ifgroup(struct ifg_group *ifg) 354{ 355 int s; 356 struct pfi_kif *kif; 357 358 if ((kif = (struct pfi_kif *)ifg->ifg_pf_kif) == NULL) 359 return; 360 361 s = splsoftnet(); 362 pfi_update++; 363 364 kif->pfik_group = NULL; 365 ifg->ifg_pf_kif = NULL; 366 pfi_kif_unref(kif, PFI_KIF_REF_NONE); 367 splx(s); 368} 369 370void 371pfi_group_change(const char *group) 372{ 373 struct pfi_kif *kif; 374 int s; 375 376 s = splsoftnet(); 377 pfi_update++; 378 if ((kif = pfi_kif_get(group)) == NULL) 379 panic("pfi_kif_get failed"); 380 381 pfi_kif_update(kif); 382 383 splx(s); 384} 385 386int 387pfi_match_addr(struct pfi_dynaddr *dyn, struct pf_addr *a, sa_family_t af) 388{ 389 switch (af) { 390#ifdef INET 391 case AF_INET: 392 switch (dyn->pfid_acnt4) { 393 case 0: 394 return (0); 395 case 1: 396 return (PF_MATCHA(0, &dyn->pfid_addr4, 397 &dyn->pfid_mask4, a, AF_INET)); 398 default: 399 return (pfr_match_addr(dyn->pfid_kt, a, AF_INET)); 400 } 401 break; 402#endif /* INET */ 403#ifdef INET6 404 case AF_INET6: 405 switch (dyn->pfid_acnt6) { 406 case 0: 407 return (0); 408 case 1: 409 return (PF_MATCHA(0, &dyn->pfid_addr6, 410 &dyn->pfid_mask6, a, AF_INET6)); 411 default: 412 return (pfr_match_addr(dyn->pfid_kt, a, AF_INET6)); 413 } 414 break; 415#endif /* INET6 */ 416 default: 417 return (0); 418 } 419} 420 421int 422pfi_dynaddr_setup(struct pf_addr_wrap *aw, sa_family_t af) 423{ 424 struct pfi_dynaddr *dyn; 425 char tblname[PF_TABLE_NAME_SIZE]; 426 struct pf_ruleset *ruleset = NULL; 427 int s, rv = 0; 428 429 if (aw->type != PF_ADDR_DYNIFTL) 430 return (0); 431 if ((dyn = pool_get(&pfi_addr_pl, PR_NOWAIT)) == NULL) 432 return (1); 433 bzero(dyn, sizeof(*dyn)); 434 435 s = splsoftnet(); 436 if (!strcmp(aw->v.ifname, "self")) 437 dyn->pfid_kif = pfi_kif_get(IFG_ALL); 438 else 439 dyn->pfid_kif = pfi_kif_get(aw->v.ifname); 440 if (dyn->pfid_kif == NULL) { 441 rv = 1; 442 goto _bad; 443 } 444 pfi_kif_ref(dyn->pfid_kif, PFI_KIF_REF_RULE); 445 446 dyn->pfid_net = pfi_unmask(&aw->v.a.mask); 447 if (af == AF_INET && dyn->pfid_net == 32) 448 dyn->pfid_net = 128; 449 strlcpy(tblname, aw->v.ifname, sizeof(tblname)); 450 if (aw->iflags & PFI_AFLAG_NETWORK) 451 strlcat(tblname, ":network", sizeof(tblname)); 452 if (aw->iflags & PFI_AFLAG_BROADCAST) 453 strlcat(tblname, ":broadcast", sizeof(tblname)); 454 if (aw->iflags & PFI_AFLAG_PEER) 455 strlcat(tblname, ":peer", sizeof(tblname)); 456 if (aw->iflags & PFI_AFLAG_NOALIAS) 457 strlcat(tblname, ":0", sizeof(tblname)); 458 if (dyn->pfid_net != 128) 459 snprintf(tblname + strlen(tblname), 460 sizeof(tblname) - strlen(tblname), "/%d", dyn->pfid_net); 461 if ((ruleset = pf_find_or_create_ruleset(PF_RESERVED_ANCHOR)) == NULL) { 462 rv = 1; 463 goto _bad; 464 } 465 466 if ((dyn->pfid_kt = pfr_attach_table(ruleset, tblname)) == NULL) { 467 rv = 1; 468 goto _bad; 469 } 470 471 dyn->pfid_kt->pfrkt_flags |= PFR_TFLAG_ACTIVE; 472 dyn->pfid_iflags = aw->iflags; 473 dyn->pfid_af = af; 474 475 TAILQ_INSERT_TAIL(&dyn->pfid_kif->pfik_dynaddrs, dyn, entry); 476 aw->p.dyn = dyn; 477 pfi_kif_update(dyn->pfid_kif); 478 splx(s); 479 return (0); 480 481_bad: 482 if (dyn->pfid_kt != NULL) 483 pfr_detach_table(dyn->pfid_kt); 484 if (ruleset != NULL) 485 pf_remove_if_empty_ruleset(ruleset); 486 if (dyn->pfid_kif != NULL) 487 pfi_kif_unref(dyn->pfid_kif, PFI_KIF_REF_RULE); 488 pool_put(&pfi_addr_pl, dyn); 489 splx(s); 490 return (rv); 491} 492 493void 494pfi_kif_update(struct pfi_kif *kif) 495{ 496 struct ifg_list *ifgl; 497 struct pfi_dynaddr *p; 498 499 /* update all dynaddr */ 500 TAILQ_FOREACH(p, &kif->pfik_dynaddrs, entry) 501 pfi_dynaddr_update(p); 502 503 /* again for all groups kif is member of */ 504 if (kif->pfik_ifp != NULL) { 505 struct ifg_list_head *ifgh = if_get_groups(kif->pfik_ifp); 506 507 TAILQ_FOREACH(ifgl, ifgh, ifgl_next) 508 pfi_kif_update((struct pfi_kif *) 509 ifgl->ifgl_group->ifg_pf_kif); 510 } 511} 512 513void 514pfi_dynaddr_update(struct pfi_dynaddr *dyn) 515{ 516 struct pfi_kif *kif; 517 struct pfr_ktable *kt; 518 519 if (dyn == NULL || dyn->pfid_kif == NULL || dyn->pfid_kt == NULL) 520 panic("pfi_dynaddr_update"); 521 522 kif = dyn->pfid_kif; 523 kt = dyn->pfid_kt; 524 525 if (kt->pfrkt_larg != pfi_update) { 526 /* this table needs to be brought up-to-date */ 527 pfi_table_update(kt, kif, dyn->pfid_net, dyn->pfid_iflags); 528 kt->pfrkt_larg = pfi_update; 529 } 530 pfr_dynaddr_update(kt, dyn); 531} 532 533void 534pfi_table_update(struct pfr_ktable *kt, struct pfi_kif *kif, int net, int flags) 535{ 536 int e, size2 = 0; 537 struct ifg_member *ifgm; 538 539 pfi_buffer_cnt = 0; 540 541 if (kif->pfik_ifp != NULL) 542 pfi_instance_add(kif->pfik_ifp, net, flags); 543 else if (kif->pfik_group != NULL) 544 TAILQ_FOREACH(ifgm, &kif->pfik_group->ifg_members, ifgm_next) 545 pfi_instance_add(ifgm->ifgm_ifp, net, flags); 546 547 if ((e = pfr_set_addrs(&kt->pfrkt_t, pfi_buffer, pfi_buffer_cnt, &size2, 548 NULL, NULL, NULL, 0, PFR_TFLAG_ALLMASK))) 549 printf("pfi_table_update: cannot set %d new addresses " 550 "into table %s: %d\n", pfi_buffer_cnt, kt->pfrkt_name, e); 551} 552 553void 554pfi_instance_add(struct ifnet *ifp, int net, int flags) 555{ 556 struct ifaddr *ia; 557 int got4 = 0, got6 = 0; 558 int net2, af; 559 int s; 560 561 if (ifp == NULL) 562 return; 563 564 /* Depends on pfi_address_add doesn't sleep */ 565 s = pserialize_read_enter(); 566 IFADDR_READER_FOREACH(ia, ifp) { 567 af = ia->ifa_addr->sa_family; 568 if (af != AF_INET && af != AF_INET6) 569 continue; 570 if ((flags & PFI_AFLAG_BROADCAST) && af == AF_INET6) 571 continue; 572 if ((flags & PFI_AFLAG_BROADCAST) && 573 !(ifp->if_flags & IFF_BROADCAST)) 574 continue; 575 if ((flags & PFI_AFLAG_PEER) && 576 !(ifp->if_flags & IFF_POINTOPOINT)) 577 continue; 578 if ((flags & PFI_AFLAG_NETWORK) && af == AF_INET6 && 579 IN6_IS_ADDR_LINKLOCAL( 580 &((struct sockaddr_in6 *)ia->ifa_addr)->sin6_addr)) 581 continue; 582 if (flags & PFI_AFLAG_NOALIAS) { 583 if (af == AF_INET && got4) 584 continue; 585 if (af == AF_INET6 && got6) 586 continue; 587 } 588 if (af == AF_INET) 589 got4 = 1; 590 else if (af == AF_INET6) 591 got6 = 1; 592 net2 = net; 593 if (net2 == 128 && (flags & PFI_AFLAG_NETWORK)) { 594 if (af == AF_INET) 595 net2 = pfi_unmask(&((struct sockaddr_in *) 596 ia->ifa_netmask)->sin_addr); 597 else if (af == AF_INET6) 598 net2 = pfi_unmask(&((struct sockaddr_in6 *) 599 ia->ifa_netmask)->sin6_addr); 600 } 601 if (af == AF_INET && net2 > 32) 602 net2 = 32; 603 if (flags & PFI_AFLAG_BROADCAST) 604 pfi_address_add(ia->ifa_broadaddr, af, net2); 605 else if (flags & PFI_AFLAG_PEER) 606 pfi_address_add(ia->ifa_dstaddr, af, net2); 607 else 608 pfi_address_add(ia->ifa_addr, af, net2); 609 } 610 pserialize_read_exit(s); 611} 612 613void 614pfi_address_add(struct sockaddr *sa, int af, int net) 615{ 616 struct pfr_addr *p; 617 int i; 618 619 if (pfi_buffer_cnt >= pfi_buffer_max) { 620 int new_max = pfi_buffer_max * 2; 621 622 if (new_max > PFI_BUFFER_MAX) { 623 printf("pfi_address_add: address buffer full (%d/%d)\n", 624 pfi_buffer_cnt, PFI_BUFFER_MAX); 625 return; 626 } 627 p = malloc(new_max * sizeof(*pfi_buffer), PFI_MTYPE, M_NOWAIT); 628 if (p == NULL) { 629 printf("pfi_address_add: no memory to grow buffer " 630 "(%d/%d)\n", pfi_buffer_cnt, PFI_BUFFER_MAX); 631 return; 632 } 633 memcpy(p, pfi_buffer, pfi_buffer_cnt * sizeof(*pfi_buffer)); 634 /* no need to zero buffer */ 635 free(pfi_buffer, PFI_MTYPE); 636 pfi_buffer = p; 637 pfi_buffer_max = new_max; 638 } 639 if (af == AF_INET && net > 32) 640 net = 128; 641 p = pfi_buffer + pfi_buffer_cnt++; 642 bzero(p, sizeof(*p)); 643 p->pfra_af = af; 644 p->pfra_net = net; 645 if (af == AF_INET) 646 p->pfra_ip4addr = ((struct sockaddr_in *)sa)->sin_addr; 647 else if (af == AF_INET6) { 648 p->pfra_ip6addr = ((struct sockaddr_in6 *)sa)->sin6_addr; 649 if (IN6_IS_SCOPE_EMBEDDABLE(&p->pfra_ip6addr)) 650 p->pfra_ip6addr.s6_addr16[1] = 0; 651 } 652 /* mask network address bits */ 653 if (net < 128) 654 ((char *)p)[p->pfra_net/8] &= ~(0xFF >> (p->pfra_net%8)); 655 for (i = (p->pfra_net+7)/8; i < sizeof(p->pfra_u); i++) 656 ((char *)p)[i] = 0; 657} 658 659void 660pfi_dynaddr_remove(struct pf_addr_wrap *aw) 661{ 662 int s; 663 664 if (aw->type != PF_ADDR_DYNIFTL || aw->p.dyn == NULL || 665 aw->p.dyn->pfid_kif == NULL || aw->p.dyn->pfid_kt == NULL) 666 return; 667 668 s = splsoftnet(); 669 TAILQ_REMOVE(&aw->p.dyn->pfid_kif->pfik_dynaddrs, aw->p.dyn, entry); 670 pfi_kif_unref(aw->p.dyn->pfid_kif, PFI_KIF_REF_RULE); 671 aw->p.dyn->pfid_kif = NULL; 672 pfr_detach_table(aw->p.dyn->pfid_kt); 673 aw->p.dyn->pfid_kt = NULL; 674 pool_put(&pfi_addr_pl, aw->p.dyn); 675 aw->p.dyn = NULL; 676 splx(s); 677} 678 679void 680pfi_dynaddr_copyout(struct pf_addr_wrap *aw) 681{ 682 if (aw->type != PF_ADDR_DYNIFTL || aw->p.dyn == NULL || 683 aw->p.dyn->pfid_kif == NULL) 684 return; 685 aw->p.dyncnt = aw->p.dyn->pfid_acnt4 + aw->p.dyn->pfid_acnt6; 686} 687 688void 689pfi_kifaddr_update(void *v) 690{ 691 int s; 692 struct pfi_kif *kif = (struct pfi_kif *)v; 693 694 s = splsoftnet(); 695 pfi_update++; 696 pfi_kif_update(kif); 697 splx(s); 698} 699 700int 701pfi_if_compare(struct pfi_kif *p, struct pfi_kif *q) 702{ 703 return (strncmp(p->pfik_name, q->pfik_name, IFNAMSIZ)); 704} 705 706void 707pfi_fill_oldstatus(struct pf_status *pfs) 708{ 709 struct pfi_kif *p; 710 struct pfi_kif_cmp key; 711 int i, j, k, s; 712 713 strlcpy(key.pfik_name, pfs->ifname, sizeof(key.pfik_name)); 714 s = splsoftnet(); 715 p = RB_FIND(pfi_ifhead, &pfi_ifs, (struct pfi_kif *)&key); 716 if (p == NULL) { 717 splx(s); 718 return; 719 } 720 bzero(pfs->pcounters, sizeof(pfs->pcounters)); 721 bzero(pfs->bcounters, sizeof(pfs->bcounters)); 722 for (i = 0; i < 2; i++) 723 for (j = 0; j < 2; j++) 724 for (k = 0; k < 2; k++) { 725 pfs->pcounters[i][j][k] = 726 p->pfik_packets[i][j][k]; 727 pfs->bcounters[i][j] += 728 p->pfik_bytes[i][j][k]; 729 } 730 splx(s); 731} 732 733int 734pfi_clr_istats(const char *name) 735{ 736 struct pfi_kif *p; 737 int s; 738 739 s = splsoftnet(); 740 RB_FOREACH(p, pfi_ifhead, &pfi_ifs) { 741 if (pfi_skip_if(name, p)) 742 continue; 743 bzero(p->pfik_packets, sizeof(p->pfik_packets)); 744 bzero(p->pfik_bytes, sizeof(p->pfik_bytes)); 745 p->pfik_tzero = time_second; 746 } 747 splx(s); 748 749 return (0); 750} 751 752int 753pfi_get_ifaces(const char *name, struct pfi_kif *buf, int *size) 754{ 755 struct pfi_kif *p, *nextp; 756 int s, n = 0; 757 758 s = splsoftnet(); 759 for (p = RB_MIN(pfi_ifhead, &pfi_ifs); p; p = nextp) { 760 nextp = RB_NEXT(pfi_ifhead, &pfi_ifs, p); 761 if (pfi_skip_if(name, p)) 762 continue; 763 if (*size > n++) { 764 if (!p->pfik_tzero) 765 p->pfik_tzero = time_second; 766 pfi_kif_ref(p, PFI_KIF_REF_RULE); 767 if (copyout(p, buf++, sizeof(*buf))) { 768 pfi_kif_unref(p, PFI_KIF_REF_RULE); 769 splx(s); 770 return (EFAULT); 771 } 772 nextp = RB_NEXT(pfi_ifhead, &pfi_ifs, p); 773 pfi_kif_unref(p, PFI_KIF_REF_RULE); 774 } 775 } 776 splx(s); 777 *size = n; 778 return (0); 779} 780 781int 782pfi_skip_if(const char *filter, struct pfi_kif *p) 783{ 784 int n; 785 786 if (filter == NULL || !*filter) 787 return (0); 788 if (!strcmp(p->pfik_name, filter)) 789 return (0); /* exact match */ 790 n = strlen(filter); 791 if (n < 1 || n >= IFNAMSIZ) 792 return (1); /* sanity check */ 793 if (filter[n-1] >= '0' && filter[n-1] <= '9') 794 return (1); /* only do exact match in that case */ 795 if (strncmp(p->pfik_name, filter, n)) 796 return (1); /* prefix doesn't match */ 797 return (p->pfik_name[n] < '0' || p->pfik_name[n] > '9'); 798} 799 800int 801pfi_set_flags(const char *name, int flags) 802{ 803 struct pfi_kif *p; 804 int s; 805 806 s = splsoftnet(); 807 RB_FOREACH(p, pfi_ifhead, &pfi_ifs) { 808 if (pfi_skip_if(name, p)) 809 continue; 810 p->pfik_flags |= flags; 811 } 812 splx(s); 813 return (0); 814} 815 816int 817pfi_clear_flags(const char *name, int flags) 818{ 819 struct pfi_kif *p; 820 int s; 821 822 s = splsoftnet(); 823 RB_FOREACH(p, pfi_ifhead, &pfi_ifs) { 824 if (pfi_skip_if(name, p)) 825 continue; 826 p->pfik_flags &= ~flags; 827 } 828 splx(s); 829 return (0); 830} 831 832/* from pf_print_state.c */ 833int 834pfi_unmask(void *addr) 835{ 836 struct pf_addr *m = addr; 837 int i = 31, j = 0, b = 0; 838 u_int32_t tmp; 839 840 while (j < 4 && m->addr32[j] == 0xffffffff) { 841 b += 32; 842 j++; 843 } 844 if (j < 4) { 845 tmp = ntohl(m->addr32[j]); 846 for (i = 31; tmp & (1 << i); --i) 847 b++; 848 } 849 return (b); 850} 851 852#ifdef __NetBSD__ 853static void 854pfi_copy_group(char *dest, const char *src, ssize_t sz) 855{ 856 while (sz > 1 && *src && !(*src >= '0' && *src <= '9')) { 857 *dest++ = *src++; 858 sz--; 859 } 860 if (sz > 0) 861 *dest++ = '\0'; 862} 863 864void 865pfi_init_groups(struct ifnet *ifp) 866{ 867 char group[IFNAMSIZ]; 868 869 if_init_groups(ifp); 870 if_addgroup(ifp, IFG_ALL); 871 872 pfi_copy_group(group, ifp->if_xname, sizeof(group)); 873 if_addgroup(ifp, group); 874} 875 876void 877pfi_destroy_groups(struct ifnet *ifp) 878{ 879 char group[IFNAMSIZ]; 880 881 pfi_copy_group(group, ifp->if_xname, sizeof(group)); 882 if_delgroup(ifp, group); 883 884 if_delgroup(ifp, IFG_ALL); 885 if_destroy_groups(ifp); 886} 887 888void 889pfil_ifnet_wrapper(void *arg, u_long cmd, void *arg2) 890{ 891 ifnet_t *ifp = arg2; 892 893 switch (cmd) { 894 case PFIL_IFNET_ATTACH: 895 pfi_init_groups(ifp); 896 897 pfi_attach_ifnet(ifp); 898 break; 899 case PFIL_IFNET_DETACH: 900 pfi_detach_ifnet(ifp); 901 902 pfi_destroy_groups(ifp); 903 break; 904 default: 905 panic("pfil_ifnet_wrapper: unexpected cmd %lu", cmd); 906 } 907} 908 909void 910pfil_ifaddr_wrapper(void *arg, u_long cmd, void *arg2) 911{ 912 struct ifaddr *ifa = arg2; 913 914 switch (cmd) { 915 case SIOCSIFADDR: 916 case SIOCAIFADDR: 917 case SIOCDIFADDR: 918#ifdef INET6 919 case SIOCAIFADDR_IN6: 920 case SIOCDIFADDR_IN6: 921#endif /* INET6 */ 922 pfi_kifaddr_update(ifa->ifa_ifp->if_pf_kif); 923 break; 924 default: 925 panic("pfil_ifaddr_wrapper: unexpected ioctl %lu", cmd); 926 } 927} 928#endif /* __NetBSD__ */ 929