pf_if.c revision 173825
1/* $OpenBSD: pf_if.c,v 1.46 2006/12/13 09:01:59 itojun Exp $ */ 2 3/* 4 * Copyright 2005 Henning Brauer <henning@openbsd.org> 5 * Copyright 2005 Ryan McBride <mcbride@openbsd.org> 6 * Copyright (c) 2001 Daniel Hartmeier 7 * Copyright (c) 2003 Cedric Berger 8 * All rights reserved. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 14 * - Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * - Redistributions in binary form must reproduce the above 17 * copyright notice, this list of conditions and the following 18 * disclaimer in the documentation and/or other materials provided 19 * with the distribution. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 22 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 23 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 24 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE 25 * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 26 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 27 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 28 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER 29 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN 31 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 32 * POSSIBILITY OF SUCH DAMAGE. 33 */ 34 35#if defined(__FreeBSD__) 36#include "opt_inet.h" 37#include "opt_inet6.h" 38 39#include <sys/cdefs.h> 40__FBSDID("$FreeBSD: head/sys/contrib/pf/net/pf_if.c 173825 2007-11-21 16:08:06Z mlaier $"); 41#endif 42 43#include <sys/param.h> 44#include <sys/systm.h> 45#ifdef __FreeBSD__ 46#include <sys/malloc.h> 47#endif 48#include <sys/mbuf.h> 49#include <sys/filio.h> 50#include <sys/socket.h> 51#include <sys/socketvar.h> 52#include <sys/kernel.h> 53#ifndef __FreeBSD__ 54#include <sys/device.h> 55#endif 56#include <sys/time.h> 57 58#include <net/if.h> 59#include <net/if_types.h> 60 61#include <netinet/in.h> 62#include <netinet/in_var.h> 63#include <netinet/in_systm.h> 64#include <netinet/ip.h> 65#include <netinet/ip_var.h> 66 67#include <net/pfvar.h> 68 69#ifdef INET6 70#include <netinet/ip6.h> 71#endif /* INET6 */ 72 73struct pfi_kif *pfi_all = NULL; 74struct pfi_statehead pfi_statehead; 75#ifdef __FreeBSD__ 76uma_zone_t pfi_addr_pl; 77#else 78struct pool pfi_addr_pl; 79#endif 80struct pfi_ifhead pfi_ifs; 81long pfi_update = 1; 82struct pfr_addr *pfi_buffer; 83int pfi_buffer_cnt; 84int pfi_buffer_max; 85#ifdef __FreeBSD__ 86eventhandler_tag pfi_attach_cookie = NULL; 87eventhandler_tag pfi_detach_cookie = NULL; 88eventhandler_tag pfi_attach_group_cookie = NULL; 89eventhandler_tag pfi_change_group_cookie = NULL; 90eventhandler_tag pfi_detach_group_cookie = NULL; 91eventhandler_tag pfi_ifaddr_event_cookie = NULL; 92#endif 93 94void pfi_kif_update(struct pfi_kif *); 95void pfi_dynaddr_update(struct pfi_dynaddr *dyn); 96void pfi_table_update(struct pfr_ktable *, struct pfi_kif *, 97 int, int); 98void pfi_kifaddr_update(void *); 99void pfi_instance_add(struct ifnet *, int, int); 100void pfi_address_add(struct sockaddr *, int, int); 101int pfi_if_compare(struct pfi_kif *, struct pfi_kif *); 102int pfi_skip_if(const char *, struct pfi_kif *); 103int pfi_unmask(void *); 104#ifdef __FreeBSD__ 105void pfi_attach_ifnet_event(void * __unused, struct ifnet *); 106void pfi_detach_ifnet_event(void * __unused, struct ifnet *); 107void pfi_attach_group_event(void * __unused, struct ifg_group *); 108void pfi_change_group_event(void * __unused, char *); 109void pfi_detach_group_event(void * __unused, struct ifg_group *); 110void pfi_ifaddr_event(void * __unused, struct ifnet *); 111 112extern struct ifgrouphead ifg_head; 113#endif 114 115RB_PROTOTYPE(pfi_ifhead, pfi_kif, pfik_tree, pfi_if_compare); 116RB_GENERATE(pfi_ifhead, pfi_kif, pfik_tree, pfi_if_compare); 117 118#define PFI_BUFFER_MAX 0x10000 119#define PFI_MTYPE M_IFADDR 120 121void 122pfi_initialize(void) 123{ 124 if (pfi_all != NULL) /* already initialized */ 125 return; 126 127 TAILQ_INIT(&pfi_statehead); 128#ifndef __FreeBSD__ 129 pool_init(&pfi_addr_pl, sizeof(struct pfi_dynaddr), 0, 0, 0, 130 "pfiaddrpl", &pool_allocator_nointr); 131#endif 132 pfi_buffer_max = 64; 133 pfi_buffer = malloc(pfi_buffer_max * sizeof(*pfi_buffer), 134 PFI_MTYPE, M_WAITOK); 135 136 if ((pfi_all = pfi_kif_get(IFG_ALL)) == NULL) 137 panic("pfi_kif_get for pfi_all failed"); 138 139#ifdef __FreeBSD__ 140 struct ifg_group *ifg; 141 struct ifnet *ifp; 142 143 IFNET_RLOCK(); 144 TAILQ_FOREACH(ifg, &ifg_head, ifg_next) 145 pfi_attach_ifgroup(ifg); 146 TAILQ_FOREACH(ifp, &ifnet, if_link) 147 pfi_attach_ifnet(ifp); 148 IFNET_RUNLOCK(); 149 150 pfi_attach_cookie = EVENTHANDLER_REGISTER(ifnet_arrival_event, 151 pfi_attach_ifnet_event, NULL, EVENTHANDLER_PRI_ANY); 152 pfi_detach_cookie = EVENTHANDLER_REGISTER(ifnet_departure_event, 153 pfi_detach_ifnet_event, NULL, EVENTHANDLER_PRI_ANY); 154 pfi_attach_group_cookie = EVENTHANDLER_REGISTER(group_attach_event, 155 pfi_attach_group_event, NULL, EVENTHANDLER_PRI_ANY); 156 pfi_change_group_cookie = EVENTHANDLER_REGISTER(group_change_event, 157 pfi_change_group_event, NULL, EVENTHANDLER_PRI_ANY); 158 pfi_detach_group_cookie = EVENTHANDLER_REGISTER(group_detach_event, 159 pfi_detach_group_event, NULL, EVENTHANDLER_PRI_ANY); 160 pfi_ifaddr_event_cookie = EVENTHANDLER_REGISTER(ifaddr_event, 161 pfi_ifaddr_event, NULL, EVENTHANDLER_PRI_ANY); 162#endif 163} 164 165#ifdef __FreeBSD__ 166void 167pfi_cleanup(void) 168{ 169 struct pfi_kif *p; 170 171 PF_UNLOCK(); 172 EVENTHANDLER_DEREGISTER(ifnet_arrival_event, pfi_attach_cookie); 173 EVENTHANDLER_DEREGISTER(ifnet_departure_event, pfi_detach_cookie); 174 EVENTHANDLER_DEREGISTER(group_attach_event, pfi_attach_group_cookie); 175 EVENTHANDLER_DEREGISTER(group_change_event, pfi_change_group_cookie); 176 EVENTHANDLER_DEREGISTER(group_detach_event, pfi_detach_group_cookie); 177 EVENTHANDLER_DEREGISTER(ifaddr_event, pfi_ifaddr_event_cookie); 178 PF_LOCK(); 179 180 pfi_all = NULL; 181 while ((p = RB_MIN(pfi_ifhead, &pfi_ifs))) { 182 if (p->pfik_rules || p->pfik_states) { 183 printf("pfi_cleanup: dangling refs for %s\n", 184 p->pfik_name); 185 } 186 187 RB_REMOVE(pfi_ifhead, &pfi_ifs, p); 188 free(p, PFI_MTYPE); 189 } 190 191 free(pfi_buffer, PFI_MTYPE); 192} 193#endif 194 195struct pfi_kif * 196pfi_kif_get(const char *kif_name) 197{ 198 struct pfi_kif *kif; 199 struct pfi_kif_cmp s; 200 201 bzero(&s, sizeof(s)); 202 strlcpy(s.pfik_name, kif_name, sizeof(s.pfik_name)); 203 if ((kif = RB_FIND(pfi_ifhead, &pfi_ifs, (struct pfi_kif *)&s)) != NULL) 204 return (kif); 205 206 /* create new one */ 207#ifdef __FreeBSD__ 208 if ((kif = malloc(sizeof(*kif), PFI_MTYPE, M_NOWAIT)) == NULL) 209#else 210 if ((kif = malloc(sizeof(*kif), PFI_MTYPE, M_DONTWAIT)) == NULL) 211#endif 212 return (NULL); 213 214 bzero(kif, sizeof(*kif)); 215 strlcpy(kif->pfik_name, kif_name, sizeof(kif->pfik_name)); 216#ifdef __FreeBSD__ 217 /* 218 * It seems that the value of time_second is in unintialzied state 219 * when pf sets interface statistics clear time in boot phase if pf 220 * was statically linked to kernel. Instead of setting the bogus 221 * time value have pfi_get_ifaces handle this case. In 222 * pfi_get_ifaces it uses boottime.tv_sec if it sees the time is 0. 223 */ 224 kif->pfik_tzero = time_second > 1 ? time_second : 0; 225#else 226 kif->pfik_tzero = time_second; 227#endif 228 TAILQ_INIT(&kif->pfik_dynaddrs); 229 230 RB_INSERT(pfi_ifhead, &pfi_ifs, kif); 231 return (kif); 232} 233 234void 235pfi_kif_ref(struct pfi_kif *kif, enum pfi_kif_refs what) 236{ 237 switch (what) { 238 case PFI_KIF_REF_RULE: 239 kif->pfik_rules++; 240 break; 241 case PFI_KIF_REF_STATE: 242 if (!kif->pfik_states++) 243 TAILQ_INSERT_TAIL(&pfi_statehead, kif, pfik_w_states); 244 break; 245 default: 246 panic("pfi_kif_ref with unknown type"); 247 } 248} 249 250void 251pfi_kif_unref(struct pfi_kif *kif, enum pfi_kif_refs what) 252{ 253 if (kif == NULL) 254 return; 255 256 switch (what) { 257 case PFI_KIF_REF_NONE: 258 break; 259 case PFI_KIF_REF_RULE: 260 if (kif->pfik_rules <= 0) { 261 printf("pfi_kif_unref: rules refcount <= 0\n"); 262 return; 263 } 264 kif->pfik_rules--; 265 break; 266 case PFI_KIF_REF_STATE: 267 if (kif->pfik_states <= 0) { 268 printf("pfi_kif_unref: state refcount <= 0\n"); 269 return; 270 } 271 if (!--kif->pfik_states) 272 TAILQ_REMOVE(&pfi_statehead, kif, pfik_w_states); 273 break; 274 default: 275 panic("pfi_kif_unref with unknown type"); 276 } 277 278 if (kif->pfik_ifp != NULL || kif->pfik_group != NULL || kif == pfi_all) 279 return; 280 281 if (kif->pfik_rules || kif->pfik_states) 282 return; 283 284 RB_REMOVE(pfi_ifhead, &pfi_ifs, kif); 285 free(kif, PFI_MTYPE); 286} 287 288int 289pfi_kif_match(struct pfi_kif *rule_kif, struct pfi_kif *packet_kif) 290{ 291 struct ifg_list *p; 292 293 if (rule_kif == NULL || rule_kif == packet_kif) 294 return (1); 295 296 if (rule_kif->pfik_group != NULL) 297 TAILQ_FOREACH(p, &packet_kif->pfik_ifp->if_groups, ifgl_next) 298 if (p->ifgl_group == rule_kif->pfik_group) 299 return (1); 300 301 return (0); 302} 303 304void 305pfi_attach_ifnet(struct ifnet *ifp) 306{ 307 struct pfi_kif *kif; 308 int s; 309 310 pfi_initialize(); 311 s = splsoftnet(); 312 pfi_update++; 313 if ((kif = pfi_kif_get(ifp->if_xname)) == NULL) 314 panic("pfi_kif_get failed"); 315 316 kif->pfik_ifp = ifp; 317 ifp->if_pf_kif = (caddr_t)kif; 318 319#ifndef __FreeBSD__ 320 if ((kif->pfik_ah_cookie = hook_establish(ifp->if_addrhooks, 1, 321 pfi_kifaddr_update, kif)) == NULL) 322 panic("pfi_attach_ifnet: cannot allocate '%s' address hook", 323 ifp->if_xname); 324#endif 325 326 pfi_kif_update(kif); 327 328 splx(s); 329} 330 331void 332pfi_detach_ifnet(struct ifnet *ifp) 333{ 334 int s; 335 struct pfi_kif *kif; 336 337 if ((kif = (struct pfi_kif *)ifp->if_pf_kif) == NULL) 338 return; 339 340 s = splsoftnet(); 341 pfi_update++; 342#ifndef __FreeBSD__ 343 hook_disestablish(ifp->if_addrhooks, kif->pfik_ah_cookie); 344#endif 345 pfi_kif_update(kif); 346 347 kif->pfik_ifp = NULL; 348 ifp->if_pf_kif = NULL; 349 pfi_kif_unref(kif, PFI_KIF_REF_NONE); 350 splx(s); 351} 352 353void 354pfi_attach_ifgroup(struct ifg_group *ifg) 355{ 356 struct pfi_kif *kif; 357 int s; 358 359 pfi_initialize(); 360 s = splsoftnet(); 361 pfi_update++; 362 if ((kif = pfi_kif_get(ifg->ifg_group)) == NULL) 363 panic("pfi_kif_get failed"); 364 365 kif->pfik_group = ifg; 366 ifg->ifg_pf_kif = (caddr_t)kif; 367 368 splx(s); 369} 370 371void 372pfi_detach_ifgroup(struct ifg_group *ifg) 373{ 374 int s; 375 struct pfi_kif *kif; 376 377 if ((kif = (struct pfi_kif *)ifg->ifg_pf_kif) == NULL) 378 return; 379 380 s = splsoftnet(); 381 pfi_update++; 382 383 kif->pfik_group = NULL; 384 ifg->ifg_pf_kif = NULL; 385 pfi_kif_unref(kif, PFI_KIF_REF_NONE); 386 splx(s); 387} 388 389void 390pfi_group_change(const char *group) 391{ 392 struct pfi_kif *kif; 393 int s; 394 395 s = splsoftnet(); 396 pfi_update++; 397 if ((kif = pfi_kif_get(group)) == NULL) 398 panic("pfi_kif_get failed"); 399 400 pfi_kif_update(kif); 401 402 splx(s); 403} 404 405int 406pfi_match_addr(struct pfi_dynaddr *dyn, struct pf_addr *a, sa_family_t af) 407{ 408 switch (af) { 409#ifdef INET 410 case AF_INET: 411 switch (dyn->pfid_acnt4) { 412 case 0: 413 return (0); 414 case 1: 415 return (PF_MATCHA(0, &dyn->pfid_addr4, 416 &dyn->pfid_mask4, a, AF_INET)); 417 default: 418 return (pfr_match_addr(dyn->pfid_kt, a, AF_INET)); 419 } 420 break; 421#endif /* INET */ 422#ifdef INET6 423 case AF_INET6: 424 switch (dyn->pfid_acnt6) { 425 case 0: 426 return (0); 427 case 1: 428 return (PF_MATCHA(0, &dyn->pfid_addr6, 429 &dyn->pfid_mask6, a, AF_INET6)); 430 default: 431 return (pfr_match_addr(dyn->pfid_kt, a, AF_INET6)); 432 } 433 break; 434#endif /* INET6 */ 435 default: 436 return (0); 437 } 438} 439 440int 441pfi_dynaddr_setup(struct pf_addr_wrap *aw, sa_family_t af) 442{ 443 struct pfi_dynaddr *dyn; 444 char tblname[PF_TABLE_NAME_SIZE]; 445 struct pf_ruleset *ruleset = NULL; 446 int s, rv = 0; 447 448 if (aw->type != PF_ADDR_DYNIFTL) 449 return (0); 450 if ((dyn = pool_get(&pfi_addr_pl, PR_NOWAIT)) == NULL) 451 return (1); 452 bzero(dyn, sizeof(*dyn)); 453 454 s = splsoftnet(); 455 if (!strcmp(aw->v.ifname, "self")) 456 dyn->pfid_kif = pfi_kif_get(IFG_ALL); 457 else 458 dyn->pfid_kif = pfi_kif_get(aw->v.ifname); 459 if (dyn->pfid_kif == NULL) { 460 rv = 1; 461 goto _bad; 462 } 463 pfi_kif_ref(dyn->pfid_kif, PFI_KIF_REF_RULE); 464 465 dyn->pfid_net = pfi_unmask(&aw->v.a.mask); 466 if (af == AF_INET && dyn->pfid_net == 32) 467 dyn->pfid_net = 128; 468 strlcpy(tblname, aw->v.ifname, sizeof(tblname)); 469 if (aw->iflags & PFI_AFLAG_NETWORK) 470 strlcat(tblname, ":network", sizeof(tblname)); 471 if (aw->iflags & PFI_AFLAG_BROADCAST) 472 strlcat(tblname, ":broadcast", sizeof(tblname)); 473 if (aw->iflags & PFI_AFLAG_PEER) 474 strlcat(tblname, ":peer", sizeof(tblname)); 475 if (aw->iflags & PFI_AFLAG_NOALIAS) 476 strlcat(tblname, ":0", sizeof(tblname)); 477 if (dyn->pfid_net != 128) 478 snprintf(tblname + strlen(tblname), 479 sizeof(tblname) - strlen(tblname), "/%d", dyn->pfid_net); 480 if ((ruleset = pf_find_or_create_ruleset(PF_RESERVED_ANCHOR)) == NULL) { 481 rv = 1; 482 goto _bad; 483 } 484 485 if ((dyn->pfid_kt = pfr_attach_table(ruleset, tblname)) == NULL) { 486 rv = 1; 487 goto _bad; 488 } 489 490 dyn->pfid_kt->pfrkt_flags |= PFR_TFLAG_ACTIVE; 491 dyn->pfid_iflags = aw->iflags; 492 dyn->pfid_af = af; 493 494 TAILQ_INSERT_TAIL(&dyn->pfid_kif->pfik_dynaddrs, dyn, entry); 495 aw->p.dyn = dyn; 496 pfi_kif_update(dyn->pfid_kif); 497 splx(s); 498 return (0); 499 500_bad: 501 if (dyn->pfid_kt != NULL) 502 pfr_detach_table(dyn->pfid_kt); 503 if (ruleset != NULL) 504 pf_remove_if_empty_ruleset(ruleset); 505 if (dyn->pfid_kif != NULL) 506 pfi_kif_unref(dyn->pfid_kif, PFI_KIF_REF_RULE); 507 pool_put(&pfi_addr_pl, dyn); 508 splx(s); 509 return (rv); 510} 511 512void 513pfi_kif_update(struct pfi_kif *kif) 514{ 515 struct ifg_list *ifgl; 516 struct pfi_dynaddr *p; 517 518 /* update all dynaddr */ 519 TAILQ_FOREACH(p, &kif->pfik_dynaddrs, entry) 520 pfi_dynaddr_update(p); 521 522 /* again for all groups kif is member of */ 523 if (kif->pfik_ifp != NULL) 524 TAILQ_FOREACH(ifgl, &kif->pfik_ifp->if_groups, ifgl_next) 525 pfi_kif_update((struct pfi_kif *) 526 ifgl->ifgl_group->ifg_pf_kif); 527} 528 529void 530pfi_dynaddr_update(struct pfi_dynaddr *dyn) 531{ 532 struct pfi_kif *kif; 533 struct pfr_ktable *kt; 534 535 if (dyn == NULL || dyn->pfid_kif == NULL || dyn->pfid_kt == NULL) 536 panic("pfi_dynaddr_update"); 537 538 kif = dyn->pfid_kif; 539 kt = dyn->pfid_kt; 540 541 if (kt->pfrkt_larg != pfi_update) { 542 /* this table needs to be brought up-to-date */ 543 pfi_table_update(kt, kif, dyn->pfid_net, dyn->pfid_iflags); 544 kt->pfrkt_larg = pfi_update; 545 } 546 pfr_dynaddr_update(kt, dyn); 547} 548 549void 550pfi_table_update(struct pfr_ktable *kt, struct pfi_kif *kif, int net, int flags) 551{ 552 int e, size2 = 0; 553 struct ifg_member *ifgm; 554 555 pfi_buffer_cnt = 0; 556 557 if (kif->pfik_ifp != NULL) 558 pfi_instance_add(kif->pfik_ifp, net, flags); 559 else if (kif->pfik_group != NULL) 560 TAILQ_FOREACH(ifgm, &kif->pfik_group->ifg_members, ifgm_next) 561 pfi_instance_add(ifgm->ifgm_ifp, net, flags); 562 563 if ((e = pfr_set_addrs(&kt->pfrkt_t, pfi_buffer, pfi_buffer_cnt, &size2, 564 NULL, NULL, NULL, 0, PFR_TFLAG_ALLMASK))) 565 printf("pfi_table_update: cannot set %d new addresses " 566 "into table %s: %d\n", pfi_buffer_cnt, kt->pfrkt_name, e); 567} 568 569void 570pfi_instance_add(struct ifnet *ifp, int net, int flags) 571{ 572 struct ifaddr *ia; 573 int got4 = 0, got6 = 0; 574 int net2, af; 575 576 if (ifp == NULL) 577 return; 578 TAILQ_FOREACH(ia, &ifp->if_addrlist, ifa_list) { 579 if (ia->ifa_addr == NULL) 580 continue; 581 af = ia->ifa_addr->sa_family; 582 if (af != AF_INET && af != AF_INET6) 583 continue; 584#ifdef __FreeBSD__ 585 /* 586 * XXX: For point-to-point interfaces, (ifname:0) and IPv4, 587 * jump over addresses without a proper route to work 588 * around a problem with ppp not fully removing the 589 * address used during IPCP. 590 */ 591 if ((ifp->if_flags & IFF_POINTOPOINT) && 592 !(ia->ifa_flags & IFA_ROUTE) && 593 (flags & PFI_AFLAG_NOALIAS) && (af == AF_INET)) 594 continue; 595#endif 596 if ((flags & PFI_AFLAG_BROADCAST) && af == AF_INET6) 597 continue; 598 if ((flags & PFI_AFLAG_BROADCAST) && 599 !(ifp->if_flags & IFF_BROADCAST)) 600 continue; 601 if ((flags & PFI_AFLAG_PEER) && 602 !(ifp->if_flags & IFF_POINTOPOINT)) 603 continue; 604 if ((flags & PFI_AFLAG_NETWORK) && af == AF_INET6 && 605 IN6_IS_ADDR_LINKLOCAL( 606 &((struct sockaddr_in6 *)ia->ifa_addr)->sin6_addr)) 607 continue; 608 if (flags & PFI_AFLAG_NOALIAS) { 609 if (af == AF_INET && got4) 610 continue; 611 if (af == AF_INET6 && got6) 612 continue; 613 } 614 if (af == AF_INET) 615 got4 = 1; 616 else if (af == AF_INET6) 617 got6 = 1; 618 net2 = net; 619 if (net2 == 128 && (flags & PFI_AFLAG_NETWORK)) { 620 if (af == AF_INET) 621 net2 = pfi_unmask(&((struct sockaddr_in *) 622 ia->ifa_netmask)->sin_addr); 623 else if (af == AF_INET6) 624 net2 = pfi_unmask(&((struct sockaddr_in6 *) 625 ia->ifa_netmask)->sin6_addr); 626 } 627 if (af == AF_INET && net2 > 32) 628 net2 = 32; 629 if (flags & PFI_AFLAG_BROADCAST) 630 pfi_address_add(ia->ifa_broadaddr, af, net2); 631 else if (flags & PFI_AFLAG_PEER) 632 pfi_address_add(ia->ifa_dstaddr, af, net2); 633 else 634 pfi_address_add(ia->ifa_addr, af, net2); 635 } 636} 637 638void 639pfi_address_add(struct sockaddr *sa, int af, int net) 640{ 641 struct pfr_addr *p; 642 int i; 643 644 if (pfi_buffer_cnt >= pfi_buffer_max) { 645 int new_max = pfi_buffer_max * 2; 646 647 if (new_max > PFI_BUFFER_MAX) { 648 printf("pfi_address_add: address buffer full (%d/%d)\n", 649 pfi_buffer_cnt, PFI_BUFFER_MAX); 650 return; 651 } 652 p = malloc(new_max * sizeof(*pfi_buffer), PFI_MTYPE, 653#ifdef __FreeBSD__ 654 M_NOWAIT); 655#else 656 M_DONTWAIT); 657#endif 658 if (p == NULL) { 659 printf("pfi_address_add: no memory to grow buffer " 660 "(%d/%d)\n", pfi_buffer_cnt, PFI_BUFFER_MAX); 661 return; 662 } 663 memcpy(pfi_buffer, p, pfi_buffer_cnt * sizeof(*pfi_buffer)); 664 /* no need to zero buffer */ 665 free(pfi_buffer, PFI_MTYPE); 666 pfi_buffer = p; 667 pfi_buffer_max = new_max; 668 } 669 if (af == AF_INET && net > 32) 670 net = 128; 671 p = pfi_buffer + pfi_buffer_cnt++; 672 bzero(p, sizeof(*p)); 673 p->pfra_af = af; 674 p->pfra_net = net; 675 if (af == AF_INET) 676 p->pfra_ip4addr = ((struct sockaddr_in *)sa)->sin_addr; 677 else if (af == AF_INET6) { 678 p->pfra_ip6addr = ((struct sockaddr_in6 *)sa)->sin6_addr; 679 if (IN6_IS_SCOPE_EMBED(&p->pfra_ip6addr)) 680 p->pfra_ip6addr.s6_addr16[1] = 0; 681 } 682 /* mask network address bits */ 683 if (net < 128) 684 ((caddr_t)p)[p->pfra_net/8] &= ~(0xFF >> (p->pfra_net%8)); 685 for (i = (p->pfra_net+7)/8; i < sizeof(p->pfra_u); i++) 686 ((caddr_t)p)[i] = 0; 687} 688 689void 690pfi_dynaddr_remove(struct pf_addr_wrap *aw) 691{ 692 int s; 693 694 if (aw->type != PF_ADDR_DYNIFTL || aw->p.dyn == NULL || 695 aw->p.dyn->pfid_kif == NULL || aw->p.dyn->pfid_kt == NULL) 696 return; 697 698 s = splsoftnet(); 699 TAILQ_REMOVE(&aw->p.dyn->pfid_kif->pfik_dynaddrs, aw->p.dyn, entry); 700 pfi_kif_unref(aw->p.dyn->pfid_kif, PFI_KIF_REF_RULE); 701 aw->p.dyn->pfid_kif = NULL; 702 pfr_detach_table(aw->p.dyn->pfid_kt); 703 aw->p.dyn->pfid_kt = NULL; 704 pool_put(&pfi_addr_pl, aw->p.dyn); 705 aw->p.dyn = NULL; 706 splx(s); 707} 708 709void 710pfi_dynaddr_copyout(struct pf_addr_wrap *aw) 711{ 712 if (aw->type != PF_ADDR_DYNIFTL || aw->p.dyn == NULL || 713 aw->p.dyn->pfid_kif == NULL) 714 return; 715 aw->p.dyncnt = aw->p.dyn->pfid_acnt4 + aw->p.dyn->pfid_acnt6; 716} 717 718void 719pfi_kifaddr_update(void *v) 720{ 721 int s; 722 struct pfi_kif *kif = (struct pfi_kif *)v; 723 724 s = splsoftnet(); 725 pfi_update++; 726 pfi_kif_update(kif); 727 splx(s); 728} 729 730int 731pfi_if_compare(struct pfi_kif *p, struct pfi_kif *q) 732{ 733 return (strncmp(p->pfik_name, q->pfik_name, IFNAMSIZ)); 734} 735 736void 737pfi_fill_oldstatus(struct pf_status *pfs) 738{ 739 struct pfi_kif *p; 740 struct pfi_kif_cmp key; 741 int i, j, k, s; 742 743 strlcpy(key.pfik_name, pfs->ifname, sizeof(key.pfik_name)); 744 s = splsoftnet(); 745 p = RB_FIND(pfi_ifhead, &pfi_ifs, (struct pfi_kif *)&key); 746 if (p == NULL) { 747 splx(s); 748 return; 749 } 750 bzero(pfs->pcounters, sizeof(pfs->pcounters)); 751 bzero(pfs->bcounters, sizeof(pfs->bcounters)); 752 for (i = 0; i < 2; i++) 753 for (j = 0; j < 2; j++) 754 for (k = 0; k < 2; k++) { 755 pfs->pcounters[i][j][k] = 756 p->pfik_packets[i][j][k]; 757 pfs->bcounters[i][j] += 758 p->pfik_bytes[i][j][k]; 759 } 760 splx(s); 761} 762 763int 764pfi_clr_istats(const char *name) 765{ 766 struct pfi_kif *p; 767 int s; 768 769 s = splsoftnet(); 770 RB_FOREACH(p, pfi_ifhead, &pfi_ifs) { 771 if (pfi_skip_if(name, p)) 772 continue; 773 bzero(p->pfik_packets, sizeof(p->pfik_packets)); 774 bzero(p->pfik_bytes, sizeof(p->pfik_bytes)); 775 p->pfik_tzero = time_second; 776 } 777 splx(s); 778 779 return (0); 780} 781 782int 783pfi_get_ifaces(const char *name, struct pfi_kif *buf, int *size) 784{ 785 struct pfi_kif *p, *nextp; 786 int s, n = 0; 787#ifdef __FreeBSD__ 788 int error; 789#endif 790 791 s = splsoftnet(); 792 for (p = RB_MIN(pfi_ifhead, &pfi_ifs); p; p = nextp) { 793 nextp = RB_NEXT(pfi_ifhead, &pfi_ifs, p); 794 if (pfi_skip_if(name, p)) 795 continue; 796 if (*size > n++) { 797 if (!p->pfik_tzero) 798 p->pfik_tzero = time_second; 799 pfi_kif_ref(p, PFI_KIF_REF_RULE); 800#ifdef __FreeBSD__ 801 PF_COPYOUT(p, buf++, sizeof(*buf), error); 802 if (error) { 803#else 804 if (copyout(p, buf++, sizeof(*buf))) { 805#endif 806 pfi_kif_unref(p, PFI_KIF_REF_RULE); 807 splx(s); 808 return (EFAULT); 809 } 810 nextp = RB_NEXT(pfi_ifhead, &pfi_ifs, p); 811 pfi_kif_unref(p, PFI_KIF_REF_RULE); 812 } 813 } 814 splx(s); 815 *size = n; 816 return (0); 817} 818 819int 820pfi_skip_if(const char *filter, struct pfi_kif *p) 821{ 822 int n; 823 824 if (filter == NULL || !*filter) 825 return (0); 826 if (!strcmp(p->pfik_name, filter)) 827 return (0); /* exact match */ 828 n = strlen(filter); 829 if (n < 1 || n >= IFNAMSIZ) 830 return (1); /* sanity check */ 831 if (filter[n-1] >= '0' && filter[n-1] <= '9') 832 return (1); /* only do exact match in that case */ 833 if (strncmp(p->pfik_name, filter, n)) 834 return (1); /* prefix doesn't match */ 835 return (p->pfik_name[n] < '0' || p->pfik_name[n] > '9'); 836} 837 838int 839pfi_set_flags(const char *name, int flags) 840{ 841 struct pfi_kif *p; 842 int s; 843 844 s = splsoftnet(); 845 RB_FOREACH(p, pfi_ifhead, &pfi_ifs) { 846 if (pfi_skip_if(name, p)) 847 continue; 848 p->pfik_flags |= flags; 849 } 850 splx(s); 851 return (0); 852} 853 854int 855pfi_clear_flags(const char *name, int flags) 856{ 857 struct pfi_kif *p; 858 int s; 859 860 s = splsoftnet(); 861 RB_FOREACH(p, pfi_ifhead, &pfi_ifs) { 862 if (pfi_skip_if(name, p)) 863 continue; 864 p->pfik_flags &= ~flags; 865 } 866 splx(s); 867 return (0); 868} 869 870/* from pf_print_state.c */ 871int 872pfi_unmask(void *addr) 873{ 874 struct pf_addr *m = addr; 875 int i = 31, j = 0, b = 0; 876 u_int32_t tmp; 877 878 while (j < 4 && m->addr32[j] == 0xffffffff) { 879 b += 32; 880 j++; 881 } 882 if (j < 4) { 883 tmp = ntohl(m->addr32[j]); 884 for (i = 31; tmp & (1 << i); --i) 885 b++; 886 } 887 return (b); 888} 889 890#ifdef __FreeBSD__ 891void 892pfi_attach_ifnet_event(void *arg __unused, struct ifnet *ifp) 893{ 894 PF_LOCK(); 895 pfi_attach_ifnet(ifp); 896 PF_UNLOCK(); 897} 898 899void 900pfi_detach_ifnet_event(void *arg __unused, struct ifnet *ifp) 901{ 902 PF_LOCK(); 903 pfi_detach_ifnet(ifp); 904 PF_UNLOCK(); 905} 906 907void 908pfi_attach_group_event(void *arg __unused, struct ifg_group *ifg) 909{ 910 PF_LOCK(); 911 pfi_attach_ifgroup(ifg); 912 PF_UNLOCK(); 913} 914 915void 916pfi_change_group_event(void *arg __unused, char *gname) 917{ 918 PF_LOCK(); 919 pfi_group_change(gname); 920 PF_UNLOCK(); 921} 922 923void 924pfi_detach_group_event(void *arg __unused, struct ifg_group *ifg) 925{ 926 PF_LOCK(); 927 pfi_detach_ifgroup(ifg); 928 PF_UNLOCK(); 929} 930 931void 932pfi_ifaddr_event(void *arg __unused, struct ifnet *ifp) 933{ 934 PF_LOCK(); 935 if (ifp && ifp->if_pf_kif) 936 pfi_kifaddr_update(ifp->if_pf_kif); 937 PF_UNLOCK(); 938} 939#endif /* __FreeBSD__ */ 940