pf_if.c revision 238498
1/* $OpenBSD: pf_if.c,v 1.54 2008/06/14 16:55:28 mk 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 238498 2012-07-15 19:10:00Z glebius $"); 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#ifndef __FreeBSD__ 58#include <sys/pool.h> 59#endif 60 61#include <net/if.h> 62#include <net/if_types.h> 63#ifdef __FreeBSD__ 64#include <net/vnet.h> 65#endif 66 67#include <netinet/in.h> 68#include <netinet/in_var.h> 69#include <netinet/in_systm.h> 70#include <netinet/ip.h> 71#include <netinet/ip_var.h> 72 73#include <net/pfvar.h> 74 75#ifdef INET6 76#include <netinet/ip6.h> 77#endif /* INET6 */ 78 79#ifdef __FreeBSD__ 80VNET_DEFINE(struct pfi_kif *, pfi_all); 81VNET_DEFINE(uma_zone_t, pfi_addr_pl); 82VNET_DEFINE(struct pfi_ifhead, pfi_ifs); 83#define V_pfi_ifs VNET(pfi_ifs) 84VNET_DEFINE(long, pfi_update); 85#define V_pfi_update VNET(pfi_update) 86VNET_DEFINE(struct pfr_addr *, pfi_buffer); 87#define V_pfi_buffer VNET(pfi_buffer) 88VNET_DEFINE(int, pfi_buffer_cnt); 89#define V_pfi_buffer_cnt VNET(pfi_buffer_cnt) 90VNET_DEFINE(int, pfi_buffer_max); 91#define V_pfi_buffer_max VNET(pfi_buffer_max) 92#else 93struct pfi_kif *pfi_all = NULL; 94struct pool pfi_addr_pl; 95struct pfi_ifhead pfi_ifs; 96long pfi_update = 1; 97struct pfr_addr *pfi_buffer; 98int pfi_buffer_cnt; 99int pfi_buffer_max; 100#endif 101#ifdef __FreeBSD__ 102eventhandler_tag pfi_attach_cookie; 103eventhandler_tag pfi_detach_cookie; 104eventhandler_tag pfi_attach_group_cookie; 105eventhandler_tag pfi_change_group_cookie; 106eventhandler_tag pfi_detach_group_cookie; 107eventhandler_tag pfi_ifaddr_event_cookie; 108#endif 109 110void pfi_kif_update(struct pfi_kif *); 111void pfi_dynaddr_update(struct pfi_dynaddr *dyn); 112void pfi_table_update(struct pfr_ktable *, struct pfi_kif *, 113 int, int); 114void pfi_kifaddr_update(void *); 115void pfi_instance_add(struct ifnet *, int, int); 116void pfi_address_add(struct sockaddr *, int, int); 117int pfi_if_compare(struct pfi_kif *, struct pfi_kif *); 118int pfi_skip_if(const char *, struct pfi_kif *); 119int pfi_unmask(void *); 120#ifdef __FreeBSD__ 121void pfi_attach_ifnet_event(void * __unused, struct ifnet *); 122void pfi_detach_ifnet_event(void * __unused, struct ifnet *); 123void pfi_attach_group_event(void *, struct ifg_group *); 124void pfi_change_group_event(void *, char *); 125void pfi_detach_group_event(void *, struct ifg_group *); 126void pfi_ifaddr_event(void * __unused, struct ifnet *); 127#endif 128 129RB_PROTOTYPE(pfi_ifhead, pfi_kif, pfik_tree, pfi_if_compare); 130RB_GENERATE(pfi_ifhead, pfi_kif, pfik_tree, pfi_if_compare); 131 132#define PFI_BUFFER_MAX 0x10000 133#define PFI_MTYPE M_IFADDR 134 135void 136pfi_initialize(void) 137{ 138#ifdef __FreeBSD__ 139 if (V_pfi_all != NULL) /* already initialized */ 140#else 141 if (pfi_all != NULL) /* already initialized */ 142#endif 143 return; 144 145#ifndef __FreeBSD__ 146 pool_init(&V_pfi_addr_pl, sizeof(struct pfi_dynaddr), 0, 0, 0, 147 "pfiaddrpl", &pool_allocator_nointr); 148#endif 149#ifdef __FreeBSD__ 150 V_pfi_buffer_max = 64; 151 V_pfi_buffer = malloc(V_pfi_buffer_max * sizeof(*V_pfi_buffer), 152 PFI_MTYPE, M_WAITOK); 153 154 if ((V_pfi_all = pfi_kif_get(IFG_ALL)) == NULL) 155#else 156 pfi_buffer_max = 64; 157 pfi_buffer = malloc(pfi_buffer_max * sizeof(*pfi_buffer), 158 PFI_MTYPE, M_WAITOK); 159 160 if ((pfi_all = pfi_kif_get(IFG_ALL)) == NULL) 161#endif 162 panic("pfi_kif_get for pfi_all failed"); 163#ifdef __FreeBSD__ 164 struct ifg_group *ifg; 165 struct ifnet *ifp; 166 167 IFNET_RLOCK(); 168 TAILQ_FOREACH(ifg, &V_ifg_head, ifg_next) 169 pfi_attach_ifgroup(ifg); 170 TAILQ_FOREACH(ifp, &V_ifnet, if_link) 171 pfi_attach_ifnet(ifp); 172 IFNET_RUNLOCK(); 173 174 pfi_attach_cookie = EVENTHANDLER_REGISTER(ifnet_arrival_event, 175 pfi_attach_ifnet_event, NULL, EVENTHANDLER_PRI_ANY); 176 pfi_detach_cookie = EVENTHANDLER_REGISTER(ifnet_departure_event, 177 pfi_detach_ifnet_event, NULL, EVENTHANDLER_PRI_ANY); 178 pfi_attach_group_cookie = EVENTHANDLER_REGISTER(group_attach_event, 179 pfi_attach_group_event, curvnet, EVENTHANDLER_PRI_ANY); 180 pfi_change_group_cookie = EVENTHANDLER_REGISTER(group_change_event, 181 pfi_change_group_event, curvnet, EVENTHANDLER_PRI_ANY); 182 pfi_detach_group_cookie = EVENTHANDLER_REGISTER(group_detach_event, 183 pfi_detach_group_event, curvnet, EVENTHANDLER_PRI_ANY); 184 pfi_ifaddr_event_cookie = EVENTHANDLER_REGISTER(ifaddr_event, 185 pfi_ifaddr_event, NULL, EVENTHANDLER_PRI_ANY); 186#endif 187} 188 189#ifdef __FreeBSD__ 190void 191pfi_cleanup(void) 192{ 193 struct pfi_kif *p; 194 195 PF_UNLOCK(); 196 EVENTHANDLER_DEREGISTER(ifnet_arrival_event, pfi_attach_cookie); 197 EVENTHANDLER_DEREGISTER(ifnet_departure_event, pfi_detach_cookie); 198 EVENTHANDLER_DEREGISTER(group_attach_event, pfi_attach_group_cookie); 199 EVENTHANDLER_DEREGISTER(group_change_event, pfi_change_group_cookie); 200 EVENTHANDLER_DEREGISTER(group_detach_event, pfi_detach_group_cookie); 201 EVENTHANDLER_DEREGISTER(ifaddr_event, pfi_ifaddr_event_cookie); 202 PF_LOCK(); 203 204 V_pfi_all = NULL; 205 while ((p = RB_MIN(pfi_ifhead, &V_pfi_ifs))) { 206 if (p->pfik_rules || p->pfik_states) { 207 printf("pfi_cleanup: dangling refs for %s\n", 208 p->pfik_name); 209 } 210 211 RB_REMOVE(pfi_ifhead, &V_pfi_ifs, p); 212 free(p, PFI_MTYPE); 213 } 214 215 free(V_pfi_buffer, PFI_MTYPE); 216} 217#endif 218 219struct pfi_kif * 220pfi_kif_get(const char *kif_name) 221{ 222 struct pfi_kif *kif; 223 struct pfi_kif_cmp s; 224 225 bzero(&s, sizeof(s)); 226 strlcpy(s.pfik_name, kif_name, sizeof(s.pfik_name)); 227#ifdef __FreeBSD__ 228 if ((kif = RB_FIND(pfi_ifhead, &V_pfi_ifs, (struct pfi_kif *)&s)) != NULL) 229#else 230 if ((kif = RB_FIND(pfi_ifhead, &pfi_ifs, (struct pfi_kif *)&s)) != NULL) 231#endif 232 return (kif); 233 234 /* create new one */ 235#ifdef __FreeBSD__ 236 if ((kif = malloc(sizeof(*kif), PFI_MTYPE, M_NOWAIT | M_ZERO)) == NULL) 237#else 238 if ((kif = malloc(sizeof(*kif), PFI_MTYPE, M_DONTWAIT|M_ZERO)) == NULL) 239#endif 240 return (NULL); 241 242 strlcpy(kif->pfik_name, kif_name, sizeof(kif->pfik_name)); 243#ifdef __FreeBSD__ 244 /* 245 * It seems that the value of time_second is in unintialzied state 246 * when pf sets interface statistics clear time in boot phase if pf 247 * was statically linked to kernel. Instead of setting the bogus 248 * time value have pfi_get_ifaces handle this case. In 249 * pfi_get_ifaces it uses boottime.tv_sec if it sees the time is 0. 250 */ 251 kif->pfik_tzero = time_second > 1 ? time_second : 0; 252#else 253 kif->pfik_tzero = time_second; 254#endif 255 TAILQ_INIT(&kif->pfik_dynaddrs); 256 257#ifdef __FreeBSD__ 258 RB_INSERT(pfi_ifhead, &V_pfi_ifs, kif); 259#else 260 RB_INSERT(pfi_ifhead, &pfi_ifs, kif); 261#endif 262 263 return (kif); 264} 265 266void 267pfi_kif_ref(struct pfi_kif *kif, enum pfi_kif_refs what) 268{ 269 switch (what) { 270 case PFI_KIF_REF_RULE: 271 kif->pfik_rules++; 272 break; 273 case PFI_KIF_REF_STATE: 274 kif->pfik_states++; 275 break; 276 default: 277 panic("pfi_kif_ref with unknown type"); 278 } 279} 280 281void 282pfi_kif_unref(struct pfi_kif *kif, enum pfi_kif_refs what) 283{ 284 if (kif == NULL) 285 return; 286 287 switch (what) { 288 case PFI_KIF_REF_NONE: 289 break; 290 case PFI_KIF_REF_RULE: 291 if (kif->pfik_rules <= 0) { 292 printf("pfi_kif_unref: rules refcount <= 0\n"); 293 return; 294 } 295 kif->pfik_rules--; 296 break; 297 case PFI_KIF_REF_STATE: 298 if (kif->pfik_states <= 0) { 299 printf("pfi_kif_unref: state refcount <= 0\n"); 300 return; 301 } 302 kif->pfik_states--; 303 break; 304 default: 305 panic("pfi_kif_unref with unknown type"); 306 } 307 308#ifdef __FreeBSD__ 309 if (kif->pfik_ifp != NULL || kif->pfik_group != NULL || kif == V_pfi_all) 310#else 311 if (kif->pfik_ifp != NULL || kif->pfik_group != NULL || kif == pfi_all) 312#endif 313 return; 314 315 if (kif->pfik_rules || kif->pfik_states) 316 return; 317 318#ifdef __FreeBSD__ 319 RB_REMOVE(pfi_ifhead, &V_pfi_ifs, kif); 320#else 321 RB_REMOVE(pfi_ifhead, &pfi_ifs, kif); 322#endif 323 free(kif, PFI_MTYPE); 324} 325 326int 327pfi_kif_match(struct pfi_kif *rule_kif, struct pfi_kif *packet_kif) 328{ 329 struct ifg_list *p; 330 331 if (rule_kif == NULL || rule_kif == packet_kif) 332 return (1); 333 334 if (rule_kif->pfik_group != NULL) 335 TAILQ_FOREACH(p, &packet_kif->pfik_ifp->if_groups, ifgl_next) 336 if (p->ifgl_group == rule_kif->pfik_group) 337 return (1); 338 339 return (0); 340} 341 342void 343pfi_attach_ifnet(struct ifnet *ifp) 344{ 345 struct pfi_kif *kif; 346 int s; 347 348 pfi_initialize(); 349 s = splsoftnet(); 350#ifdef __FreeBSD__ 351 V_pfi_update++; 352#else 353 pfi_update++; 354#endif 355 if ((kif = pfi_kif_get(ifp->if_xname)) == NULL) 356 panic("pfi_kif_get failed"); 357 358 kif->pfik_ifp = ifp; 359 ifp->if_pf_kif = (caddr_t)kif; 360 361#ifndef __FreeBSD__ 362 if ((kif->pfik_ah_cookie = hook_establish(ifp->if_addrhooks, 1, 363 pfi_kifaddr_update, kif)) == NULL) 364 panic("pfi_attach_ifnet: cannot allocate '%s' address hook", 365 ifp->if_xname); 366#endif 367 368 pfi_kif_update(kif); 369 370 splx(s); 371} 372 373void 374pfi_detach_ifnet(struct ifnet *ifp) 375{ 376 int s; 377 struct pfi_kif *kif; 378 379 if ((kif = (struct pfi_kif *)ifp->if_pf_kif) == NULL) 380 return; 381 382 s = splsoftnet(); 383#ifdef __FreeBSD__ 384 V_pfi_update++; 385#else 386 pfi_update++; 387#endif 388#ifndef __FreeBSD__ 389 hook_disestablish(ifp->if_addrhooks, kif->pfik_ah_cookie); 390#endif 391 pfi_kif_update(kif); 392 393 kif->pfik_ifp = NULL; 394 ifp->if_pf_kif = NULL; 395 pfi_kif_unref(kif, PFI_KIF_REF_NONE); 396 splx(s); 397} 398 399void 400pfi_attach_ifgroup(struct ifg_group *ifg) 401{ 402 struct pfi_kif *kif; 403 int s; 404 405 pfi_initialize(); 406 s = splsoftnet(); 407#ifdef __FreeBSD__ 408 V_pfi_update++; 409#else 410 pfi_update++; 411#endif 412 if ((kif = pfi_kif_get(ifg->ifg_group)) == NULL) 413 panic("pfi_kif_get failed"); 414 415 kif->pfik_group = ifg; 416 ifg->ifg_pf_kif = (caddr_t)kif; 417 418 splx(s); 419} 420 421void 422pfi_detach_ifgroup(struct ifg_group *ifg) 423{ 424 int s; 425 struct pfi_kif *kif; 426 427 if ((kif = (struct pfi_kif *)ifg->ifg_pf_kif) == NULL) 428 return; 429 430 s = splsoftnet(); 431#ifdef __FreeBSD__ 432 V_pfi_update++; 433#else 434 pfi_update++; 435#endif 436 437 kif->pfik_group = NULL; 438 ifg->ifg_pf_kif = NULL; 439 pfi_kif_unref(kif, PFI_KIF_REF_NONE); 440 splx(s); 441} 442 443void 444pfi_group_change(const char *group) 445{ 446 struct pfi_kif *kif; 447 int s; 448 449 s = splsoftnet(); 450#ifdef __FreeBSD__ 451 V_pfi_update++; 452#else 453 pfi_update++; 454#endif 455 if ((kif = pfi_kif_get(group)) == NULL) 456 panic("pfi_kif_get failed"); 457 458 pfi_kif_update(kif); 459 460 splx(s); 461} 462 463int 464pfi_match_addr(struct pfi_dynaddr *dyn, struct pf_addr *a, sa_family_t af) 465{ 466 switch (af) { 467#ifdef INET 468 case AF_INET: 469 switch (dyn->pfid_acnt4) { 470 case 0: 471 return (0); 472 case 1: 473 return (PF_MATCHA(0, &dyn->pfid_addr4, 474 &dyn->pfid_mask4, a, AF_INET)); 475 default: 476 return (pfr_match_addr(dyn->pfid_kt, a, AF_INET)); 477 } 478 break; 479#endif /* INET */ 480#ifdef INET6 481 case AF_INET6: 482 switch (dyn->pfid_acnt6) { 483 case 0: 484 return (0); 485 case 1: 486 return (PF_MATCHA(0, &dyn->pfid_addr6, 487 &dyn->pfid_mask6, a, AF_INET6)); 488 default: 489 return (pfr_match_addr(dyn->pfid_kt, a, AF_INET6)); 490 } 491 break; 492#endif /* INET6 */ 493 default: 494 return (0); 495 } 496} 497 498int 499pfi_dynaddr_setup(struct pf_addr_wrap *aw, sa_family_t af) 500{ 501 struct pfi_dynaddr *dyn; 502 char tblname[PF_TABLE_NAME_SIZE]; 503 struct pf_ruleset *ruleset = NULL; 504 int s, rv = 0; 505 506 if (aw->type != PF_ADDR_DYNIFTL) 507 return (0); 508#ifdef __FreeBSD__ 509 if ((dyn = pool_get(&V_pfi_addr_pl, PR_NOWAIT | PR_ZERO)) 510#else 511 if ((dyn = pool_get(&pfi_addr_pl, PR_WAITOK | PR_LIMITFAIL | PR_ZERO)) 512#endif 513 == NULL) 514 return (1); 515 516 s = splsoftnet(); 517 if (!strcmp(aw->v.ifname, "self")) 518 dyn->pfid_kif = pfi_kif_get(IFG_ALL); 519 else 520 dyn->pfid_kif = pfi_kif_get(aw->v.ifname); 521 if (dyn->pfid_kif == NULL) { 522 rv = 1; 523 goto _bad; 524 } 525 pfi_kif_ref(dyn->pfid_kif, PFI_KIF_REF_RULE); 526 527 dyn->pfid_net = pfi_unmask(&aw->v.a.mask); 528 if (af == AF_INET && dyn->pfid_net == 32) 529 dyn->pfid_net = 128; 530 strlcpy(tblname, aw->v.ifname, sizeof(tblname)); 531 if (aw->iflags & PFI_AFLAG_NETWORK) 532 strlcat(tblname, ":network", sizeof(tblname)); 533 if (aw->iflags & PFI_AFLAG_BROADCAST) 534 strlcat(tblname, ":broadcast", sizeof(tblname)); 535 if (aw->iflags & PFI_AFLAG_PEER) 536 strlcat(tblname, ":peer", sizeof(tblname)); 537 if (aw->iflags & PFI_AFLAG_NOALIAS) 538 strlcat(tblname, ":0", sizeof(tblname)); 539 if (dyn->pfid_net != 128) 540 snprintf(tblname + strlen(tblname), 541 sizeof(tblname) - strlen(tblname), "/%d", dyn->pfid_net); 542 if ((ruleset = pf_find_or_create_ruleset(PF_RESERVED_ANCHOR)) == NULL) { 543 rv = 1; 544 goto _bad; 545 } 546 547 if ((dyn->pfid_kt = pfr_attach_table(ruleset, tblname, 1)) == NULL) { 548 rv = 1; 549 goto _bad; 550 } 551 552 dyn->pfid_kt->pfrkt_flags |= PFR_TFLAG_ACTIVE; 553 dyn->pfid_iflags = aw->iflags; 554 dyn->pfid_af = af; 555 556 TAILQ_INSERT_TAIL(&dyn->pfid_kif->pfik_dynaddrs, dyn, entry); 557 aw->p.dyn = dyn; 558 pfi_kif_update(dyn->pfid_kif); 559 splx(s); 560 return (0); 561 562_bad: 563 if (dyn->pfid_kt != NULL) 564 pfr_detach_table(dyn->pfid_kt); 565 if (ruleset != NULL) 566 pf_remove_if_empty_ruleset(ruleset); 567 if (dyn->pfid_kif != NULL) 568 pfi_kif_unref(dyn->pfid_kif, PFI_KIF_REF_RULE); 569#ifdef __FreeBSD__ 570 pool_put(&V_pfi_addr_pl, dyn); 571#else 572 pool_put(&pfi_addr_pl, dyn); 573#endif 574 splx(s); 575 return (rv); 576} 577 578void 579pfi_kif_update(struct pfi_kif *kif) 580{ 581 struct ifg_list *ifgl; 582 struct pfi_dynaddr *p; 583 584 /* update all dynaddr */ 585 TAILQ_FOREACH(p, &kif->pfik_dynaddrs, entry) 586 pfi_dynaddr_update(p); 587 588 /* again for all groups kif is member of */ 589 if (kif->pfik_ifp != NULL) 590 TAILQ_FOREACH(ifgl, &kif->pfik_ifp->if_groups, ifgl_next) 591 pfi_kif_update((struct pfi_kif *) 592 ifgl->ifgl_group->ifg_pf_kif); 593} 594 595void 596pfi_dynaddr_update(struct pfi_dynaddr *dyn) 597{ 598 struct pfi_kif *kif; 599 struct pfr_ktable *kt; 600 601 if (dyn == NULL || dyn->pfid_kif == NULL || dyn->pfid_kt == NULL) 602 panic("pfi_dynaddr_update"); 603 604 kif = dyn->pfid_kif; 605 kt = dyn->pfid_kt; 606 607#ifdef __FreeBSD__ 608 if (kt->pfrkt_larg != V_pfi_update) { 609#else 610 if (kt->pfrkt_larg != pfi_update) { 611#endif 612 /* this table needs to be brought up-to-date */ 613 pfi_table_update(kt, kif, dyn->pfid_net, dyn->pfid_iflags); 614#ifdef __FreeBSD__ 615 kt->pfrkt_larg = V_pfi_update; 616#else 617 kt->pfrkt_larg = pfi_update; 618#endif 619 } 620 pfr_dynaddr_update(kt, dyn); 621} 622 623void 624pfi_table_update(struct pfr_ktable *kt, struct pfi_kif *kif, int net, int flags) 625{ 626 int e, size2 = 0; 627 struct ifg_member *ifgm; 628 629#ifdef __FreeBSD__ 630 V_pfi_buffer_cnt = 0; 631#else 632 pfi_buffer_cnt = 0; 633#endif 634 635 if (kif->pfik_ifp != NULL) 636 pfi_instance_add(kif->pfik_ifp, net, flags); 637 else if (kif->pfik_group != NULL) 638 TAILQ_FOREACH(ifgm, &kif->pfik_group->ifg_members, ifgm_next) 639 pfi_instance_add(ifgm->ifgm_ifp, net, flags); 640 641#ifdef __FreeBSD__ 642 if ((e = pfr_set_addrs(&kt->pfrkt_t, V_pfi_buffer, V_pfi_buffer_cnt, &size2, 643 NULL, NULL, NULL, 0, PFR_TFLAG_ALLMASK))) 644 printf("pfi_table_update: cannot set %d new addresses " 645 "into table %s: %d\n", V_pfi_buffer_cnt, kt->pfrkt_name, e); 646#else 647 if ((e = pfr_set_addrs(&kt->pfrkt_t, pfi_buffer, pfi_buffer_cnt, &size2, 648 NULL, NULL, NULL, 0, PFR_TFLAG_ALLMASK))) 649 printf("pfi_table_update: cannot set %d new addresses " 650 "into table %s: %d\n", pfi_buffer_cnt, kt->pfrkt_name, e); 651#endif 652} 653 654void 655pfi_instance_add(struct ifnet *ifp, int net, int flags) 656{ 657 struct ifaddr *ia; 658 int got4 = 0, got6 = 0; 659 int net2, af; 660 661 if (ifp == NULL) 662 return; 663 TAILQ_FOREACH(ia, &ifp->if_addrlist, ifa_list) { 664 if (ia->ifa_addr == NULL) 665 continue; 666 af = ia->ifa_addr->sa_family; 667 if (af != AF_INET && af != AF_INET6) 668 continue; 669#ifdef __FreeBSD__ 670 /* 671 * XXX: For point-to-point interfaces, (ifname:0) and IPv4, 672 * jump over addresses without a proper route to work 673 * around a problem with ppp not fully removing the 674 * address used during IPCP. 675 */ 676 if ((ifp->if_flags & IFF_POINTOPOINT) && 677 !(ia->ifa_flags & IFA_ROUTE) && 678 (flags & PFI_AFLAG_NOALIAS) && (af == AF_INET)) 679 continue; 680#endif 681 if ((flags & PFI_AFLAG_BROADCAST) && af == AF_INET6) 682 continue; 683 if ((flags & PFI_AFLAG_BROADCAST) && 684 !(ifp->if_flags & IFF_BROADCAST)) 685 continue; 686 if ((flags & PFI_AFLAG_PEER) && 687 !(ifp->if_flags & IFF_POINTOPOINT)) 688 continue; 689 if ((flags & PFI_AFLAG_NETWORK) && af == AF_INET6 && 690 IN6_IS_ADDR_LINKLOCAL( 691 &((struct sockaddr_in6 *)ia->ifa_addr)->sin6_addr)) 692 continue; 693 if (flags & PFI_AFLAG_NOALIAS) { 694 if (af == AF_INET && got4) 695 continue; 696 if (af == AF_INET6 && got6) 697 continue; 698 } 699 if (af == AF_INET) 700 got4 = 1; 701 else if (af == AF_INET6) 702 got6 = 1; 703 net2 = net; 704 if (net2 == 128 && (flags & PFI_AFLAG_NETWORK)) { 705 if (af == AF_INET) 706 net2 = pfi_unmask(&((struct sockaddr_in *) 707 ia->ifa_netmask)->sin_addr); 708 else if (af == AF_INET6) 709 net2 = pfi_unmask(&((struct sockaddr_in6 *) 710 ia->ifa_netmask)->sin6_addr); 711 } 712 if (af == AF_INET && net2 > 32) 713 net2 = 32; 714 if (flags & PFI_AFLAG_BROADCAST) 715 pfi_address_add(ia->ifa_broadaddr, af, net2); 716 else if (flags & PFI_AFLAG_PEER) 717 pfi_address_add(ia->ifa_dstaddr, af, net2); 718 else 719 pfi_address_add(ia->ifa_addr, af, net2); 720 } 721} 722 723void 724pfi_address_add(struct sockaddr *sa, int af, int net) 725{ 726 struct pfr_addr *p; 727 int i; 728 729#ifdef __FreeBSD__ 730 if (V_pfi_buffer_cnt >= V_pfi_buffer_max) { 731 int new_max = V_pfi_buffer_max * 2; 732#else 733 if (pfi_buffer_cnt >= pfi_buffer_max) { 734 int new_max = pfi_buffer_max * 2; 735#endif 736 737 if (new_max > PFI_BUFFER_MAX) { 738 printf("pfi_address_add: address buffer full (%d/%d)\n", 739#ifdef __FreeBSD__ 740 V_pfi_buffer_cnt, PFI_BUFFER_MAX); 741#else 742 pfi_buffer_cnt, PFI_BUFFER_MAX); 743#endif 744 return; 745 } 746 p = malloc(new_max * sizeof(*V_pfi_buffer), PFI_MTYPE, 747#ifdef __FreeBSD__ 748 M_NOWAIT); 749#else 750 M_DONTWAIT); 751#endif 752 if (p == NULL) { 753 printf("pfi_address_add: no memory to grow buffer " 754#ifdef __FreeBSD__ 755 "(%d/%d)\n", V_pfi_buffer_cnt, PFI_BUFFER_MAX); 756#else 757 "(%d/%d)\n", pfi_buffer_cnt, PFI_BUFFER_MAX); 758#endif 759 return; 760 } 761#ifdef __FreeBSD__ 762 memcpy(V_pfi_buffer, p, V_pfi_buffer_cnt * sizeof(*V_pfi_buffer)); 763 /* no need to zero buffer */ 764 free(V_pfi_buffer, PFI_MTYPE); 765 V_pfi_buffer = p; 766 V_pfi_buffer_max = new_max; 767#else 768 memcpy(pfi_buffer, p, pfi_buffer_cnt * sizeof(*pfi_buffer)); 769 /* no need to zero buffer */ 770 free(pfi_buffer, PFI_MTYPE); 771 pfi_buffer = p; 772 pfi_buffer_max = new_max; 773#endif 774 } 775 if (af == AF_INET && net > 32) 776 net = 128; 777#ifdef __FreeBSD__ 778 p = V_pfi_buffer + V_pfi_buffer_cnt++; 779#else 780 p = pfi_buffer + pfi_buffer_cnt++; 781#endif 782 bzero(p, sizeof(*p)); 783 p->pfra_af = af; 784 p->pfra_net = net; 785 if (af == AF_INET) 786 p->pfra_ip4addr = ((struct sockaddr_in *)sa)->sin_addr; 787 else if (af == AF_INET6) { 788 p->pfra_ip6addr = ((struct sockaddr_in6 *)sa)->sin6_addr; 789 if (IN6_IS_SCOPE_EMBED(&p->pfra_ip6addr)) 790 p->pfra_ip6addr.s6_addr16[1] = 0; 791 } 792 /* mask network address bits */ 793 if (net < 128) 794 ((caddr_t)p)[p->pfra_net/8] &= ~(0xFF >> (p->pfra_net%8)); 795 for (i = (p->pfra_net+7)/8; i < sizeof(p->pfra_u); i++) 796 ((caddr_t)p)[i] = 0; 797} 798 799void 800pfi_dynaddr_remove(struct pf_addr_wrap *aw) 801{ 802 int s; 803 804 if (aw->type != PF_ADDR_DYNIFTL || aw->p.dyn == NULL || 805 aw->p.dyn->pfid_kif == NULL || aw->p.dyn->pfid_kt == NULL) 806 return; 807 808 s = splsoftnet(); 809 TAILQ_REMOVE(&aw->p.dyn->pfid_kif->pfik_dynaddrs, aw->p.dyn, entry); 810 pfi_kif_unref(aw->p.dyn->pfid_kif, PFI_KIF_REF_RULE); 811 aw->p.dyn->pfid_kif = NULL; 812 pfr_detach_table(aw->p.dyn->pfid_kt); 813 aw->p.dyn->pfid_kt = NULL; 814#ifdef __FreeBSD__ 815 pool_put(&V_pfi_addr_pl, aw->p.dyn); 816#else 817 pool_put(&pfi_addr_pl, aw->p.dyn); 818#endif 819 aw->p.dyn = NULL; 820 splx(s); 821} 822 823void 824pfi_dynaddr_copyout(struct pf_addr_wrap *aw) 825{ 826 if (aw->type != PF_ADDR_DYNIFTL || aw->p.dyn == NULL || 827 aw->p.dyn->pfid_kif == NULL) 828 return; 829 aw->p.dyncnt = aw->p.dyn->pfid_acnt4 + aw->p.dyn->pfid_acnt6; 830} 831 832void 833pfi_kifaddr_update(void *v) 834{ 835 int s; 836 struct pfi_kif *kif = (struct pfi_kif *)v; 837 838 s = splsoftnet(); 839#ifdef __FreeBSD__ 840 V_pfi_update++; 841#else 842 pfi_update++; 843#endif 844 pfi_kif_update(kif); 845 splx(s); 846} 847 848int 849pfi_if_compare(struct pfi_kif *p, struct pfi_kif *q) 850{ 851 return (strncmp(p->pfik_name, q->pfik_name, IFNAMSIZ)); 852} 853 854void 855pfi_update_status(const char *name, struct pf_status *pfs) 856{ 857 struct pfi_kif *p; 858 struct pfi_kif_cmp key; 859 struct ifg_member p_member, *ifgm; 860 TAILQ_HEAD(, ifg_member) ifg_members; 861 int i, j, k, s; 862 863 strlcpy(key.pfik_name, name, sizeof(key.pfik_name)); 864 s = splsoftnet(); 865#ifdef __FreeBSD__ 866 p = RB_FIND(pfi_ifhead, &V_pfi_ifs, (struct pfi_kif *)&key); 867#else 868 p = RB_FIND(pfi_ifhead, &pfi_ifs, (struct pfi_kif *)&key); 869#endif 870 if (p == NULL) { 871 splx(s); 872 return; 873 } 874 if (p->pfik_group != NULL) { 875 bcopy(&p->pfik_group->ifg_members, &ifg_members, 876 sizeof(ifg_members)); 877 } else { 878 /* build a temporary list for p only */ 879 bzero(&p_member, sizeof(p_member)); 880 p_member.ifgm_ifp = p->pfik_ifp; 881 TAILQ_INIT(&ifg_members); 882 TAILQ_INSERT_TAIL(&ifg_members, &p_member, ifgm_next); 883 } 884 if (pfs) { 885 bzero(pfs->pcounters, sizeof(pfs->pcounters)); 886 bzero(pfs->bcounters, sizeof(pfs->bcounters)); 887 } 888 TAILQ_FOREACH(ifgm, &ifg_members, ifgm_next) { 889 if (ifgm->ifgm_ifp == NULL) 890 continue; 891 p = (struct pfi_kif *)ifgm->ifgm_ifp->if_pf_kif; 892 893 /* just clear statistics */ 894 if (pfs == NULL) { 895 bzero(p->pfik_packets, sizeof(p->pfik_packets)); 896 bzero(p->pfik_bytes, sizeof(p->pfik_bytes)); 897 p->pfik_tzero = time_second; 898 continue; 899 } 900 for (i = 0; i < 2; i++) 901 for (j = 0; j < 2; j++) 902 for (k = 0; k < 2; k++) { 903 pfs->pcounters[i][j][k] += 904 p->pfik_packets[i][j][k]; 905 pfs->bcounters[i][j] += 906 p->pfik_bytes[i][j][k]; 907 } 908 } 909 splx(s); 910} 911 912int 913pfi_get_ifaces(const char *name, struct pfi_kif *buf, int *size) 914{ 915 struct pfi_kif *p, *nextp; 916 int s, n = 0; 917#ifdef __FreeBSD__ 918 int error; 919#endif 920 921 s = splsoftnet(); 922#ifdef __FreeBSD__ 923 for (p = RB_MIN(pfi_ifhead, &V_pfi_ifs); p; p = nextp) { 924 nextp = RB_NEXT(pfi_ifhead, &V_pfi_ifs, p); 925#else 926 for (p = RB_MIN(pfi_ifhead, &pfi_ifs); p; p = nextp) { 927 nextp = RB_NEXT(pfi_ifhead, &pfi_ifs, p); 928#endif 929 if (pfi_skip_if(name, p)) 930 continue; 931 if (*size > n++) { 932 if (!p->pfik_tzero) 933 p->pfik_tzero = time_second; 934 pfi_kif_ref(p, PFI_KIF_REF_RULE); 935#ifdef __FreeBSD__ 936 PF_COPYOUT(p, buf++, sizeof(*buf), error); 937 if (error) { 938#else 939 if (copyout(p, buf++, sizeof(*buf))) { 940#endif 941 pfi_kif_unref(p, PFI_KIF_REF_RULE); 942 splx(s); 943 return (EFAULT); 944 } 945#ifdef __FreeBSD__ 946 nextp = RB_NEXT(pfi_ifhead, &V_pfi_ifs, p); 947#else 948 nextp = RB_NEXT(pfi_ifhead, &pfi_ifs, p); 949#endif 950 pfi_kif_unref(p, PFI_KIF_REF_RULE); 951 } 952 } 953 splx(s); 954 *size = n; 955 return (0); 956} 957 958int 959pfi_skip_if(const char *filter, struct pfi_kif *p) 960{ 961 int n; 962 963 if (filter == NULL || !*filter) 964 return (0); 965 if (!strcmp(p->pfik_name, filter)) 966 return (0); /* exact match */ 967 n = strlen(filter); 968 if (n < 1 || n >= IFNAMSIZ) 969 return (1); /* sanity check */ 970 if (filter[n-1] >= '0' && filter[n-1] <= '9') 971 return (1); /* only do exact match in that case */ 972 if (strncmp(p->pfik_name, filter, n)) 973 return (1); /* prefix doesn't match */ 974 return (p->pfik_name[n] < '0' || p->pfik_name[n] > '9'); 975} 976 977int 978pfi_set_flags(const char *name, int flags) 979{ 980 struct pfi_kif *p; 981 int s; 982 983 s = splsoftnet(); 984#ifdef __FreeBSD__ 985 RB_FOREACH(p, pfi_ifhead, &V_pfi_ifs) { 986#else 987 RB_FOREACH(p, pfi_ifhead, &pfi_ifs) { 988#endif 989 if (pfi_skip_if(name, p)) 990 continue; 991 p->pfik_flags |= flags; 992 } 993 splx(s); 994 return (0); 995} 996 997int 998pfi_clear_flags(const char *name, int flags) 999{ 1000 struct pfi_kif *p; 1001 int s; 1002 1003 s = splsoftnet(); 1004#ifdef __FreeBSD__ 1005 RB_FOREACH(p, pfi_ifhead, &V_pfi_ifs) { 1006#else 1007 RB_FOREACH(p, pfi_ifhead, &pfi_ifs) { 1008#endif 1009 if (pfi_skip_if(name, p)) 1010 continue; 1011 p->pfik_flags &= ~flags; 1012 } 1013 splx(s); 1014 return (0); 1015} 1016 1017/* from pf_print_state.c */ 1018int 1019pfi_unmask(void *addr) 1020{ 1021 struct pf_addr *m = addr; 1022 int i = 31, j = 0, b = 0; 1023 u_int32_t tmp; 1024 1025 while (j < 4 && m->addr32[j] == 0xffffffff) { 1026 b += 32; 1027 j++; 1028 } 1029 if (j < 4) { 1030 tmp = ntohl(m->addr32[j]); 1031 for (i = 31; tmp & (1 << i); --i) 1032 b++; 1033 } 1034 return (b); 1035} 1036 1037#ifdef __FreeBSD__ 1038void 1039pfi_attach_ifnet_event(void *arg __unused, struct ifnet *ifp) 1040{ 1041 1042 CURVNET_SET(ifp->if_vnet); 1043 PF_LOCK(); 1044 pfi_attach_ifnet(ifp); 1045#ifdef ALTQ 1046 pf_altq_ifnet_event(ifp, 0); 1047#endif 1048 PF_UNLOCK(); 1049 CURVNET_RESTORE(); 1050} 1051 1052void 1053pfi_detach_ifnet_event(void *arg __unused, struct ifnet *ifp) 1054{ 1055 1056 CURVNET_SET(ifp->if_vnet); 1057 PF_LOCK(); 1058 pfi_detach_ifnet(ifp); 1059#ifdef ALTQ 1060 pf_altq_ifnet_event(ifp, 1); 1061#endif 1062 PF_UNLOCK(); 1063 CURVNET_RESTORE(); 1064} 1065 1066void 1067pfi_attach_group_event(void *arg , struct ifg_group *ifg) 1068{ 1069 1070 CURVNET_SET((struct vnet *)arg); 1071 PF_LOCK(); 1072 pfi_attach_ifgroup(ifg); 1073 PF_UNLOCK(); 1074 CURVNET_RESTORE(); 1075} 1076 1077void 1078pfi_change_group_event(void *arg, char *gname) 1079{ 1080 1081 CURVNET_SET((struct vnet *)arg); 1082 PF_LOCK(); 1083 pfi_group_change(gname); 1084 PF_UNLOCK(); 1085 CURVNET_RESTORE(); 1086} 1087 1088void 1089pfi_detach_group_event(void *arg, struct ifg_group *ifg) 1090{ 1091 1092 CURVNET_SET((struct vnet *)arg); 1093 PF_LOCK(); 1094 pfi_detach_ifgroup(ifg); 1095 PF_UNLOCK(); 1096 CURVNET_RESTORE(); 1097} 1098 1099void 1100pfi_ifaddr_event(void *arg __unused, struct ifnet *ifp) 1101{ 1102 1103 CURVNET_SET(ifp->if_vnet); 1104 PF_LOCK(); 1105 if (ifp && ifp->if_pf_kif) 1106 pfi_kifaddr_update(ifp->if_pf_kif); 1107 PF_UNLOCK(); 1108 CURVNET_RESTORE(); 1109} 1110#endif /* __FreeBSD__ */ 1111