pf_if.c revision 189106
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#include "opt_route.h" 39 40#include <sys/cdefs.h> 41__FBSDID("$FreeBSD: head/sys/contrib/pf/net/pf_if.c 189106 2009-02-27 14:12:05Z bz $"); 42#endif 43 44#include <sys/param.h> 45#include <sys/systm.h> 46#ifdef __FreeBSD__ 47#include <sys/malloc.h> 48#endif 49#include <sys/mbuf.h> 50#include <sys/filio.h> 51#include <sys/socket.h> 52#include <sys/socketvar.h> 53#include <sys/kernel.h> 54#ifndef __FreeBSD__ 55#include <sys/device.h> 56#endif 57#include <sys/time.h> 58#ifdef __FreeBSD__ 59#include <sys/vimage.h> 60#endif 61 62#include <net/if.h> 63#include <net/if_types.h> 64#ifdef __FreeBSD__ 65#include <net/route.h> 66#include <net/vnet.h> 67#endif 68 69#include <netinet/in.h> 70#include <netinet/in_var.h> 71#include <netinet/in_systm.h> 72#include <netinet/ip.h> 73#include <netinet/ip_var.h> 74 75#include <net/pfvar.h> 76 77#ifdef INET6 78#include <netinet/ip6.h> 79#endif /* INET6 */ 80 81struct pfi_kif *pfi_all = NULL; 82struct pfi_statehead pfi_statehead; 83#ifdef __FreeBSD__ 84uma_zone_t pfi_addr_pl; 85#else 86struct pool pfi_addr_pl; 87#endif 88struct pfi_ifhead pfi_ifs; 89long pfi_update = 1; 90struct pfr_addr *pfi_buffer; 91int pfi_buffer_cnt; 92int pfi_buffer_max; 93#ifdef __FreeBSD__ 94eventhandler_tag pfi_attach_cookie = NULL; 95eventhandler_tag pfi_detach_cookie = NULL; 96eventhandler_tag pfi_attach_group_cookie = NULL; 97eventhandler_tag pfi_change_group_cookie = NULL; 98eventhandler_tag pfi_detach_group_cookie = NULL; 99eventhandler_tag pfi_ifaddr_event_cookie = NULL; 100#endif 101 102void pfi_kif_update(struct pfi_kif *); 103void pfi_dynaddr_update(struct pfi_dynaddr *dyn); 104void pfi_table_update(struct pfr_ktable *, struct pfi_kif *, 105 int, int); 106void pfi_kifaddr_update(void *); 107void pfi_instance_add(struct ifnet *, int, int); 108void pfi_address_add(struct sockaddr *, int, int); 109int pfi_if_compare(struct pfi_kif *, struct pfi_kif *); 110int pfi_skip_if(const char *, struct pfi_kif *); 111int pfi_unmask(void *); 112#ifdef __FreeBSD__ 113void pfi_attach_ifnet_event(void * __unused, struct ifnet *); 114void pfi_detach_ifnet_event(void * __unused, struct ifnet *); 115void pfi_attach_group_event(void * __unused, struct ifg_group *); 116void pfi_change_group_event(void * __unused, char *); 117void pfi_detach_group_event(void * __unused, struct ifg_group *); 118void pfi_ifaddr_event(void * __unused, struct ifnet *); 119 120#ifdef VIMAGE_GLOBALS 121extern struct ifgrouphead ifg_head; 122#endif 123#endif 124 125RB_PROTOTYPE(pfi_ifhead, pfi_kif, pfik_tree, pfi_if_compare); 126RB_GENERATE(pfi_ifhead, pfi_kif, pfik_tree, pfi_if_compare); 127 128#define PFI_BUFFER_MAX 0x10000 129#define PFI_MTYPE M_IFADDR 130 131void 132pfi_initialize(void) 133{ 134 INIT_VNET_NET(curvnet); 135 136 if (pfi_all != NULL) /* already initialized */ 137 return; 138 139 TAILQ_INIT(&pfi_statehead); 140#ifndef __FreeBSD__ 141 pool_init(&pfi_addr_pl, sizeof(struct pfi_dynaddr), 0, 0, 0, 142 "pfiaddrpl", &pool_allocator_nointr); 143#endif 144 pfi_buffer_max = 64; 145 pfi_buffer = malloc(pfi_buffer_max * sizeof(*pfi_buffer), 146 PFI_MTYPE, M_WAITOK); 147 148 if ((pfi_all = pfi_kif_get(IFG_ALL)) == NULL) 149 panic("pfi_kif_get for pfi_all failed"); 150 151#ifdef __FreeBSD__ 152 struct ifg_group *ifg; 153 struct ifnet *ifp; 154 155 IFNET_RLOCK(); 156 TAILQ_FOREACH(ifg, &V_ifg_head, ifg_next) 157 pfi_attach_ifgroup(ifg); 158 TAILQ_FOREACH(ifp, &V_ifnet, if_link) 159 pfi_attach_ifnet(ifp); 160 IFNET_RUNLOCK(); 161 162 pfi_attach_cookie = EVENTHANDLER_REGISTER(ifnet_arrival_event, 163 pfi_attach_ifnet_event, NULL, EVENTHANDLER_PRI_ANY); 164 pfi_detach_cookie = EVENTHANDLER_REGISTER(ifnet_departure_event, 165 pfi_detach_ifnet_event, NULL, EVENTHANDLER_PRI_ANY); 166 pfi_attach_group_cookie = EVENTHANDLER_REGISTER(group_attach_event, 167 pfi_attach_group_event, NULL, EVENTHANDLER_PRI_ANY); 168 pfi_change_group_cookie = EVENTHANDLER_REGISTER(group_change_event, 169 pfi_change_group_event, NULL, EVENTHANDLER_PRI_ANY); 170 pfi_detach_group_cookie = EVENTHANDLER_REGISTER(group_detach_event, 171 pfi_detach_group_event, NULL, EVENTHANDLER_PRI_ANY); 172 pfi_ifaddr_event_cookie = EVENTHANDLER_REGISTER(ifaddr_event, 173 pfi_ifaddr_event, NULL, EVENTHANDLER_PRI_ANY); 174#endif 175} 176 177#ifdef __FreeBSD__ 178void 179pfi_cleanup(void) 180{ 181 struct pfi_kif *p; 182 183 PF_UNLOCK(); 184 EVENTHANDLER_DEREGISTER(ifnet_arrival_event, pfi_attach_cookie); 185 EVENTHANDLER_DEREGISTER(ifnet_departure_event, pfi_detach_cookie); 186 EVENTHANDLER_DEREGISTER(group_attach_event, pfi_attach_group_cookie); 187 EVENTHANDLER_DEREGISTER(group_change_event, pfi_change_group_cookie); 188 EVENTHANDLER_DEREGISTER(group_detach_event, pfi_detach_group_cookie); 189 EVENTHANDLER_DEREGISTER(ifaddr_event, pfi_ifaddr_event_cookie); 190 PF_LOCK(); 191 192 pfi_all = NULL; 193 while ((p = RB_MIN(pfi_ifhead, &pfi_ifs))) { 194 if (p->pfik_rules || p->pfik_states) { 195 printf("pfi_cleanup: dangling refs for %s\n", 196 p->pfik_name); 197 } 198 199 RB_REMOVE(pfi_ifhead, &pfi_ifs, p); 200 free(p, PFI_MTYPE); 201 } 202 203 free(pfi_buffer, PFI_MTYPE); 204} 205#endif 206 207struct pfi_kif * 208pfi_kif_get(const char *kif_name) 209{ 210 struct pfi_kif *kif; 211 struct pfi_kif_cmp s; 212 213 bzero(&s, sizeof(s)); 214 strlcpy(s.pfik_name, kif_name, sizeof(s.pfik_name)); 215 if ((kif = RB_FIND(pfi_ifhead, &pfi_ifs, (struct pfi_kif *)&s)) != NULL) 216 return (kif); 217 218 /* create new one */ 219#ifdef __FreeBSD__ 220 if ((kif = malloc(sizeof(*kif), PFI_MTYPE, M_NOWAIT)) == NULL) 221#else 222 if ((kif = malloc(sizeof(*kif), PFI_MTYPE, M_DONTWAIT)) == NULL) 223#endif 224 return (NULL); 225 226 bzero(kif, sizeof(*kif)); 227 strlcpy(kif->pfik_name, kif_name, sizeof(kif->pfik_name)); 228#ifdef __FreeBSD__ 229 /* 230 * It seems that the value of time_second is in unintialzied state 231 * when pf sets interface statistics clear time in boot phase if pf 232 * was statically linked to kernel. Instead of setting the bogus 233 * time value have pfi_get_ifaces handle this case. In 234 * pfi_get_ifaces it uses boottime.tv_sec if it sees the time is 0. 235 */ 236 kif->pfik_tzero = time_second > 1 ? time_second : 0; 237#else 238 kif->pfik_tzero = time_second; 239#endif 240 TAILQ_INIT(&kif->pfik_dynaddrs); 241 242 RB_INSERT(pfi_ifhead, &pfi_ifs, kif); 243 return (kif); 244} 245 246void 247pfi_kif_ref(struct pfi_kif *kif, enum pfi_kif_refs what) 248{ 249 switch (what) { 250 case PFI_KIF_REF_RULE: 251 kif->pfik_rules++; 252 break; 253 case PFI_KIF_REF_STATE: 254 if (!kif->pfik_states++) 255 TAILQ_INSERT_TAIL(&pfi_statehead, kif, pfik_w_states); 256 break; 257 default: 258 panic("pfi_kif_ref with unknown type"); 259 } 260} 261 262void 263pfi_kif_unref(struct pfi_kif *kif, enum pfi_kif_refs what) 264{ 265 if (kif == NULL) 266 return; 267 268 switch (what) { 269 case PFI_KIF_REF_NONE: 270 break; 271 case PFI_KIF_REF_RULE: 272 if (kif->pfik_rules <= 0) { 273 printf("pfi_kif_unref: rules refcount <= 0\n"); 274 return; 275 } 276 kif->pfik_rules--; 277 break; 278 case PFI_KIF_REF_STATE: 279 if (kif->pfik_states <= 0) { 280 printf("pfi_kif_unref: state refcount <= 0\n"); 281 return; 282 } 283 if (!--kif->pfik_states) 284 TAILQ_REMOVE(&pfi_statehead, kif, pfik_w_states); 285 break; 286 default: 287 panic("pfi_kif_unref with unknown type"); 288 } 289 290 if (kif->pfik_ifp != NULL || kif->pfik_group != NULL || kif == pfi_all) 291 return; 292 293 if (kif->pfik_rules || kif->pfik_states) 294 return; 295 296 RB_REMOVE(pfi_ifhead, &pfi_ifs, kif); 297 free(kif, PFI_MTYPE); 298} 299 300int 301pfi_kif_match(struct pfi_kif *rule_kif, struct pfi_kif *packet_kif) 302{ 303 struct ifg_list *p; 304 305 if (rule_kif == NULL || rule_kif == packet_kif) 306 return (1); 307 308 if (rule_kif->pfik_group != NULL) 309 TAILQ_FOREACH(p, &packet_kif->pfik_ifp->if_groups, ifgl_next) 310 if (p->ifgl_group == rule_kif->pfik_group) 311 return (1); 312 313 return (0); 314} 315 316void 317pfi_attach_ifnet(struct ifnet *ifp) 318{ 319 struct pfi_kif *kif; 320 int s; 321 322 pfi_initialize(); 323 s = splsoftnet(); 324 pfi_update++; 325 if ((kif = pfi_kif_get(ifp->if_xname)) == NULL) 326 panic("pfi_kif_get failed"); 327 328 kif->pfik_ifp = ifp; 329 ifp->if_pf_kif = (caddr_t)kif; 330 331#ifndef __FreeBSD__ 332 if ((kif->pfik_ah_cookie = hook_establish(ifp->if_addrhooks, 1, 333 pfi_kifaddr_update, kif)) == NULL) 334 panic("pfi_attach_ifnet: cannot allocate '%s' address hook", 335 ifp->if_xname); 336#endif 337 338 pfi_kif_update(kif); 339 340 splx(s); 341} 342 343void 344pfi_detach_ifnet(struct ifnet *ifp) 345{ 346 int s; 347 struct pfi_kif *kif; 348 349 if ((kif = (struct pfi_kif *)ifp->if_pf_kif) == NULL) 350 return; 351 352 s = splsoftnet(); 353 pfi_update++; 354#ifndef __FreeBSD__ 355 hook_disestablish(ifp->if_addrhooks, kif->pfik_ah_cookie); 356#endif 357 pfi_kif_update(kif); 358 359 kif->pfik_ifp = NULL; 360 ifp->if_pf_kif = NULL; 361 pfi_kif_unref(kif, PFI_KIF_REF_NONE); 362 splx(s); 363} 364 365void 366pfi_attach_ifgroup(struct ifg_group *ifg) 367{ 368 struct pfi_kif *kif; 369 int s; 370 371 pfi_initialize(); 372 s = splsoftnet(); 373 pfi_update++; 374 if ((kif = pfi_kif_get(ifg->ifg_group)) == NULL) 375 panic("pfi_kif_get failed"); 376 377 kif->pfik_group = ifg; 378 ifg->ifg_pf_kif = (caddr_t)kif; 379 380 splx(s); 381} 382 383void 384pfi_detach_ifgroup(struct ifg_group *ifg) 385{ 386 int s; 387 struct pfi_kif *kif; 388 389 if ((kif = (struct pfi_kif *)ifg->ifg_pf_kif) == NULL) 390 return; 391 392 s = splsoftnet(); 393 pfi_update++; 394 395 kif->pfik_group = NULL; 396 ifg->ifg_pf_kif = NULL; 397 pfi_kif_unref(kif, PFI_KIF_REF_NONE); 398 splx(s); 399} 400 401void 402pfi_group_change(const char *group) 403{ 404 struct pfi_kif *kif; 405 int s; 406 407 s = splsoftnet(); 408 pfi_update++; 409 if ((kif = pfi_kif_get(group)) == NULL) 410 panic("pfi_kif_get failed"); 411 412 pfi_kif_update(kif); 413 414 splx(s); 415} 416 417int 418pfi_match_addr(struct pfi_dynaddr *dyn, struct pf_addr *a, sa_family_t af) 419{ 420 switch (af) { 421#ifdef INET 422 case AF_INET: 423 switch (dyn->pfid_acnt4) { 424 case 0: 425 return (0); 426 case 1: 427 return (PF_MATCHA(0, &dyn->pfid_addr4, 428 &dyn->pfid_mask4, a, AF_INET)); 429 default: 430 return (pfr_match_addr(dyn->pfid_kt, a, AF_INET)); 431 } 432 break; 433#endif /* INET */ 434#ifdef INET6 435 case AF_INET6: 436 switch (dyn->pfid_acnt6) { 437 case 0: 438 return (0); 439 case 1: 440 return (PF_MATCHA(0, &dyn->pfid_addr6, 441 &dyn->pfid_mask6, a, AF_INET6)); 442 default: 443 return (pfr_match_addr(dyn->pfid_kt, a, AF_INET6)); 444 } 445 break; 446#endif /* INET6 */ 447 default: 448 return (0); 449 } 450} 451 452int 453pfi_dynaddr_setup(struct pf_addr_wrap *aw, sa_family_t af) 454{ 455 struct pfi_dynaddr *dyn; 456 char tblname[PF_TABLE_NAME_SIZE]; 457 struct pf_ruleset *ruleset = NULL; 458 int s, rv = 0; 459 460 if (aw->type != PF_ADDR_DYNIFTL) 461 return (0); 462 if ((dyn = pool_get(&pfi_addr_pl, PR_NOWAIT)) == NULL) 463 return (1); 464 bzero(dyn, sizeof(*dyn)); 465 466 s = splsoftnet(); 467 if (!strcmp(aw->v.ifname, "self")) 468 dyn->pfid_kif = pfi_kif_get(IFG_ALL); 469 else 470 dyn->pfid_kif = pfi_kif_get(aw->v.ifname); 471 if (dyn->pfid_kif == NULL) { 472 rv = 1; 473 goto _bad; 474 } 475 pfi_kif_ref(dyn->pfid_kif, PFI_KIF_REF_RULE); 476 477 dyn->pfid_net = pfi_unmask(&aw->v.a.mask); 478 if (af == AF_INET && dyn->pfid_net == 32) 479 dyn->pfid_net = 128; 480 strlcpy(tblname, aw->v.ifname, sizeof(tblname)); 481 if (aw->iflags & PFI_AFLAG_NETWORK) 482 strlcat(tblname, ":network", sizeof(tblname)); 483 if (aw->iflags & PFI_AFLAG_BROADCAST) 484 strlcat(tblname, ":broadcast", sizeof(tblname)); 485 if (aw->iflags & PFI_AFLAG_PEER) 486 strlcat(tblname, ":peer", sizeof(tblname)); 487 if (aw->iflags & PFI_AFLAG_NOALIAS) 488 strlcat(tblname, ":0", sizeof(tblname)); 489 if (dyn->pfid_net != 128) 490 snprintf(tblname + strlen(tblname), 491 sizeof(tblname) - strlen(tblname), "/%d", dyn->pfid_net); 492 if ((ruleset = pf_find_or_create_ruleset(PF_RESERVED_ANCHOR)) == NULL) { 493 rv = 1; 494 goto _bad; 495 } 496 497 if ((dyn->pfid_kt = pfr_attach_table(ruleset, tblname)) == NULL) { 498 rv = 1; 499 goto _bad; 500 } 501 502 dyn->pfid_kt->pfrkt_flags |= PFR_TFLAG_ACTIVE; 503 dyn->pfid_iflags = aw->iflags; 504 dyn->pfid_af = af; 505 506 TAILQ_INSERT_TAIL(&dyn->pfid_kif->pfik_dynaddrs, dyn, entry); 507 aw->p.dyn = dyn; 508 pfi_kif_update(dyn->pfid_kif); 509 splx(s); 510 return (0); 511 512_bad: 513 if (dyn->pfid_kt != NULL) 514 pfr_detach_table(dyn->pfid_kt); 515 if (ruleset != NULL) 516 pf_remove_if_empty_ruleset(ruleset); 517 if (dyn->pfid_kif != NULL) 518 pfi_kif_unref(dyn->pfid_kif, PFI_KIF_REF_RULE); 519 pool_put(&pfi_addr_pl, dyn); 520 splx(s); 521 return (rv); 522} 523 524void 525pfi_kif_update(struct pfi_kif *kif) 526{ 527 struct ifg_list *ifgl; 528 struct pfi_dynaddr *p; 529 530 /* update all dynaddr */ 531 TAILQ_FOREACH(p, &kif->pfik_dynaddrs, entry) 532 pfi_dynaddr_update(p); 533 534 /* again for all groups kif is member of */ 535 if (kif->pfik_ifp != NULL) 536 TAILQ_FOREACH(ifgl, &kif->pfik_ifp->if_groups, ifgl_next) 537 pfi_kif_update((struct pfi_kif *) 538 ifgl->ifgl_group->ifg_pf_kif); 539} 540 541void 542pfi_dynaddr_update(struct pfi_dynaddr *dyn) 543{ 544 struct pfi_kif *kif; 545 struct pfr_ktable *kt; 546 547 if (dyn == NULL || dyn->pfid_kif == NULL || dyn->pfid_kt == NULL) 548 panic("pfi_dynaddr_update"); 549 550 kif = dyn->pfid_kif; 551 kt = dyn->pfid_kt; 552 553 if (kt->pfrkt_larg != pfi_update) { 554 /* this table needs to be brought up-to-date */ 555 pfi_table_update(kt, kif, dyn->pfid_net, dyn->pfid_iflags); 556 kt->pfrkt_larg = pfi_update; 557 } 558 pfr_dynaddr_update(kt, dyn); 559} 560 561void 562pfi_table_update(struct pfr_ktable *kt, struct pfi_kif *kif, int net, int flags) 563{ 564 int e, size2 = 0; 565 struct ifg_member *ifgm; 566 567 pfi_buffer_cnt = 0; 568 569 if (kif->pfik_ifp != NULL) 570 pfi_instance_add(kif->pfik_ifp, net, flags); 571 else if (kif->pfik_group != NULL) 572 TAILQ_FOREACH(ifgm, &kif->pfik_group->ifg_members, ifgm_next) 573 pfi_instance_add(ifgm->ifgm_ifp, net, flags); 574 575 if ((e = pfr_set_addrs(&kt->pfrkt_t, pfi_buffer, pfi_buffer_cnt, &size2, 576 NULL, NULL, NULL, 0, PFR_TFLAG_ALLMASK))) 577 printf("pfi_table_update: cannot set %d new addresses " 578 "into table %s: %d\n", pfi_buffer_cnt, kt->pfrkt_name, e); 579} 580 581void 582pfi_instance_add(struct ifnet *ifp, int net, int flags) 583{ 584 struct ifaddr *ia; 585 int got4 = 0, got6 = 0; 586 int net2, af; 587 588 if (ifp == NULL) 589 return; 590 TAILQ_FOREACH(ia, &ifp->if_addrlist, ifa_list) { 591 if (ia->ifa_addr == NULL) 592 continue; 593 af = ia->ifa_addr->sa_family; 594 if (af != AF_INET && af != AF_INET6) 595 continue; 596#ifdef __FreeBSD__ 597 /* 598 * XXX: For point-to-point interfaces, (ifname:0) and IPv4, 599 * jump over addresses without a proper route to work 600 * around a problem with ppp not fully removing the 601 * address used during IPCP. 602 */ 603 if ((ifp->if_flags & IFF_POINTOPOINT) && 604 !(ia->ifa_flags & IFA_ROUTE) && 605 (flags & PFI_AFLAG_NOALIAS) && (af == AF_INET)) 606 continue; 607#endif 608 if ((flags & PFI_AFLAG_BROADCAST) && af == AF_INET6) 609 continue; 610 if ((flags & PFI_AFLAG_BROADCAST) && 611 !(ifp->if_flags & IFF_BROADCAST)) 612 continue; 613 if ((flags & PFI_AFLAG_PEER) && 614 !(ifp->if_flags & IFF_POINTOPOINT)) 615 continue; 616 if ((flags & PFI_AFLAG_NETWORK) && af == AF_INET6 && 617 IN6_IS_ADDR_LINKLOCAL( 618 &((struct sockaddr_in6 *)ia->ifa_addr)->sin6_addr)) 619 continue; 620 if (flags & PFI_AFLAG_NOALIAS) { 621 if (af == AF_INET && got4) 622 continue; 623 if (af == AF_INET6 && got6) 624 continue; 625 } 626 if (af == AF_INET) 627 got4 = 1; 628 else if (af == AF_INET6) 629 got6 = 1; 630 net2 = net; 631 if (net2 == 128 && (flags & PFI_AFLAG_NETWORK)) { 632 if (af == AF_INET) 633 net2 = pfi_unmask(&((struct sockaddr_in *) 634 ia->ifa_netmask)->sin_addr); 635 else if (af == AF_INET6) 636 net2 = pfi_unmask(&((struct sockaddr_in6 *) 637 ia->ifa_netmask)->sin6_addr); 638 } 639 if (af == AF_INET && net2 > 32) 640 net2 = 32; 641 if (flags & PFI_AFLAG_BROADCAST) 642 pfi_address_add(ia->ifa_broadaddr, af, net2); 643 else if (flags & PFI_AFLAG_PEER) 644 pfi_address_add(ia->ifa_dstaddr, af, net2); 645 else 646 pfi_address_add(ia->ifa_addr, af, net2); 647 } 648} 649 650void 651pfi_address_add(struct sockaddr *sa, int af, int net) 652{ 653 struct pfr_addr *p; 654 int i; 655 656 if (pfi_buffer_cnt >= pfi_buffer_max) { 657 int new_max = pfi_buffer_max * 2; 658 659 if (new_max > PFI_BUFFER_MAX) { 660 printf("pfi_address_add: address buffer full (%d/%d)\n", 661 pfi_buffer_cnt, PFI_BUFFER_MAX); 662 return; 663 } 664 p = malloc(new_max * sizeof(*pfi_buffer), PFI_MTYPE, 665#ifdef __FreeBSD__ 666 M_NOWAIT); 667#else 668 M_DONTWAIT); 669#endif 670 if (p == NULL) { 671 printf("pfi_address_add: no memory to grow buffer " 672 "(%d/%d)\n", pfi_buffer_cnt, PFI_BUFFER_MAX); 673 return; 674 } 675 memcpy(pfi_buffer, p, pfi_buffer_cnt * sizeof(*pfi_buffer)); 676 /* no need to zero buffer */ 677 free(pfi_buffer, PFI_MTYPE); 678 pfi_buffer = p; 679 pfi_buffer_max = new_max; 680 } 681 if (af == AF_INET && net > 32) 682 net = 128; 683 p = pfi_buffer + pfi_buffer_cnt++; 684 bzero(p, sizeof(*p)); 685 p->pfra_af = af; 686 p->pfra_net = net; 687 if (af == AF_INET) 688 p->pfra_ip4addr = ((struct sockaddr_in *)sa)->sin_addr; 689 else if (af == AF_INET6) { 690 p->pfra_ip6addr = ((struct sockaddr_in6 *)sa)->sin6_addr; 691 if (IN6_IS_SCOPE_EMBED(&p->pfra_ip6addr)) 692 p->pfra_ip6addr.s6_addr16[1] = 0; 693 } 694 /* mask network address bits */ 695 if (net < 128) 696 ((caddr_t)p)[p->pfra_net/8] &= ~(0xFF >> (p->pfra_net%8)); 697 for (i = (p->pfra_net+7)/8; i < sizeof(p->pfra_u); i++) 698 ((caddr_t)p)[i] = 0; 699} 700 701void 702pfi_dynaddr_remove(struct pf_addr_wrap *aw) 703{ 704 int s; 705 706 if (aw->type != PF_ADDR_DYNIFTL || aw->p.dyn == NULL || 707 aw->p.dyn->pfid_kif == NULL || aw->p.dyn->pfid_kt == NULL) 708 return; 709 710 s = splsoftnet(); 711 TAILQ_REMOVE(&aw->p.dyn->pfid_kif->pfik_dynaddrs, aw->p.dyn, entry); 712 pfi_kif_unref(aw->p.dyn->pfid_kif, PFI_KIF_REF_RULE); 713 aw->p.dyn->pfid_kif = NULL; 714 pfr_detach_table(aw->p.dyn->pfid_kt); 715 aw->p.dyn->pfid_kt = NULL; 716 pool_put(&pfi_addr_pl, aw->p.dyn); 717 aw->p.dyn = NULL; 718 splx(s); 719} 720 721void 722pfi_dynaddr_copyout(struct pf_addr_wrap *aw) 723{ 724 if (aw->type != PF_ADDR_DYNIFTL || aw->p.dyn == NULL || 725 aw->p.dyn->pfid_kif == NULL) 726 return; 727 aw->p.dyncnt = aw->p.dyn->pfid_acnt4 + aw->p.dyn->pfid_acnt6; 728} 729 730void 731pfi_kifaddr_update(void *v) 732{ 733 int s; 734 struct pfi_kif *kif = (struct pfi_kif *)v; 735 736 s = splsoftnet(); 737 pfi_update++; 738 pfi_kif_update(kif); 739 splx(s); 740} 741 742int 743pfi_if_compare(struct pfi_kif *p, struct pfi_kif *q) 744{ 745 return (strncmp(p->pfik_name, q->pfik_name, IFNAMSIZ)); 746} 747 748void 749pfi_fill_oldstatus(struct pf_status *pfs) 750{ 751 struct pfi_kif *p; 752 struct pfi_kif_cmp key; 753 int i, j, k, s; 754 755 strlcpy(key.pfik_name, pfs->ifname, sizeof(key.pfik_name)); 756 s = splsoftnet(); 757 p = RB_FIND(pfi_ifhead, &pfi_ifs, (struct pfi_kif *)&key); 758 if (p == NULL) { 759 splx(s); 760 return; 761 } 762 bzero(pfs->pcounters, sizeof(pfs->pcounters)); 763 bzero(pfs->bcounters, sizeof(pfs->bcounters)); 764 for (i = 0; i < 2; i++) 765 for (j = 0; j < 2; j++) 766 for (k = 0; k < 2; k++) { 767 pfs->pcounters[i][j][k] = 768 p->pfik_packets[i][j][k]; 769 pfs->bcounters[i][j] += 770 p->pfik_bytes[i][j][k]; 771 } 772 splx(s); 773} 774 775int 776pfi_clr_istats(const char *name) 777{ 778 struct pfi_kif *p; 779 int s; 780 781 s = splsoftnet(); 782 RB_FOREACH(p, pfi_ifhead, &pfi_ifs) { 783 if (pfi_skip_if(name, p)) 784 continue; 785 bzero(p->pfik_packets, sizeof(p->pfik_packets)); 786 bzero(p->pfik_bytes, sizeof(p->pfik_bytes)); 787 p->pfik_tzero = time_second; 788 } 789 splx(s); 790 791 return (0); 792} 793 794int 795pfi_get_ifaces(const char *name, struct pfi_kif *buf, int *size) 796{ 797 struct pfi_kif *p, *nextp; 798 int s, n = 0; 799#ifdef __FreeBSD__ 800 int error; 801#endif 802 803 s = splsoftnet(); 804 for (p = RB_MIN(pfi_ifhead, &pfi_ifs); p; p = nextp) { 805 nextp = RB_NEXT(pfi_ifhead, &pfi_ifs, p); 806 if (pfi_skip_if(name, p)) 807 continue; 808 if (*size > n++) { 809 if (!p->pfik_tzero) 810 p->pfik_tzero = time_second; 811 pfi_kif_ref(p, PFI_KIF_REF_RULE); 812#ifdef __FreeBSD__ 813 PF_COPYOUT(p, buf++, sizeof(*buf), error); 814 if (error) { 815#else 816 if (copyout(p, buf++, sizeof(*buf))) { 817#endif 818 pfi_kif_unref(p, PFI_KIF_REF_RULE); 819 splx(s); 820 return (EFAULT); 821 } 822 nextp = RB_NEXT(pfi_ifhead, &pfi_ifs, p); 823 pfi_kif_unref(p, PFI_KIF_REF_RULE); 824 } 825 } 826 splx(s); 827 *size = n; 828 return (0); 829} 830 831int 832pfi_skip_if(const char *filter, struct pfi_kif *p) 833{ 834 int n; 835 836 if (filter == NULL || !*filter) 837 return (0); 838 if (!strcmp(p->pfik_name, filter)) 839 return (0); /* exact match */ 840 n = strlen(filter); 841 if (n < 1 || n >= IFNAMSIZ) 842 return (1); /* sanity check */ 843 if (filter[n-1] >= '0' && filter[n-1] <= '9') 844 return (1); /* only do exact match in that case */ 845 if (strncmp(p->pfik_name, filter, n)) 846 return (1); /* prefix doesn't match */ 847 return (p->pfik_name[n] < '0' || p->pfik_name[n] > '9'); 848} 849 850int 851pfi_set_flags(const char *name, int flags) 852{ 853 struct pfi_kif *p; 854 int s; 855 856 s = splsoftnet(); 857 RB_FOREACH(p, pfi_ifhead, &pfi_ifs) { 858 if (pfi_skip_if(name, p)) 859 continue; 860 p->pfik_flags |= flags; 861 } 862 splx(s); 863 return (0); 864} 865 866int 867pfi_clear_flags(const char *name, int flags) 868{ 869 struct pfi_kif *p; 870 int s; 871 872 s = splsoftnet(); 873 RB_FOREACH(p, pfi_ifhead, &pfi_ifs) { 874 if (pfi_skip_if(name, p)) 875 continue; 876 p->pfik_flags &= ~flags; 877 } 878 splx(s); 879 return (0); 880} 881 882/* from pf_print_state.c */ 883int 884pfi_unmask(void *addr) 885{ 886 struct pf_addr *m = addr; 887 int i = 31, j = 0, b = 0; 888 u_int32_t tmp; 889 890 while (j < 4 && m->addr32[j] == 0xffffffff) { 891 b += 32; 892 j++; 893 } 894 if (j < 4) { 895 tmp = ntohl(m->addr32[j]); 896 for (i = 31; tmp & (1 << i); --i) 897 b++; 898 } 899 return (b); 900} 901 902#ifdef __FreeBSD__ 903void 904pfi_attach_ifnet_event(void *arg __unused, struct ifnet *ifp) 905{ 906 PF_LOCK(); 907 pfi_attach_ifnet(ifp); 908#ifdef ALTQ 909 pf_altq_ifnet_event(ifp, 0); 910#endif 911 PF_UNLOCK(); 912} 913 914void 915pfi_detach_ifnet_event(void *arg __unused, struct ifnet *ifp) 916{ 917 PF_LOCK(); 918 pfi_detach_ifnet(ifp); 919#ifdef ALTQ 920 pf_altq_ifnet_event(ifp, 1); 921#endif 922 PF_UNLOCK(); 923} 924 925void 926pfi_attach_group_event(void *arg __unused, struct ifg_group *ifg) 927{ 928 PF_LOCK(); 929 pfi_attach_ifgroup(ifg); 930 PF_UNLOCK(); 931} 932 933void 934pfi_change_group_event(void *arg __unused, char *gname) 935{ 936 PF_LOCK(); 937 pfi_group_change(gname); 938 PF_UNLOCK(); 939} 940 941void 942pfi_detach_group_event(void *arg __unused, struct ifg_group *ifg) 943{ 944 PF_LOCK(); 945 pfi_detach_ifgroup(ifg); 946 PF_UNLOCK(); 947} 948 949void 950pfi_ifaddr_event(void *arg __unused, struct ifnet *ifp) 951{ 952 PF_LOCK(); 953 if (ifp && ifp->if_pf_kif) 954 pfi_kifaddr_update(ifp->if_pf_kif); 955 PF_UNLOCK(); 956} 957#endif /* __FreeBSD__ */ 958