pf_if.c revision 276756
1/*- 2 * Copyright (c) 2001 Daniel Hartmeier 3 * Copyright (c) 2003 Cedric Berger 4 * Copyright (c) 2005 Henning Brauer <henning@openbsd.org> 5 * Copyright (c) 2005 Ryan McBride <mcbride@openbsd.org> 6 * Copyright (c) 2012 Gleb Smirnoff <glebius@FreeBSD.org> 7 * All rights reserved. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 13 * - Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * - Redistributions in binary form must reproduce the above 16 * copyright notice, this list of conditions and the following 17 * disclaimer in the documentation and/or other materials provided 18 * with the distribution. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 21 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 22 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 23 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE 24 * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 26 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 27 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER 28 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN 30 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 31 * POSSIBILITY OF SUCH DAMAGE. 32 * 33 * $OpenBSD: pf_if.c,v 1.54 2008/06/14 16:55:28 mk Exp $ 34 */ 35 36#include <sys/cdefs.h> 37__FBSDID("$FreeBSD: head/sys/netpfil/pf/pf_if.c 276756 2015-01-06 16:47:02Z rodrigc $"); 38 39#include "opt_inet.h" 40#include "opt_inet6.h" 41 42#include <sys/param.h> 43#include <sys/kernel.h> 44#include <sys/lock.h> 45#include <sys/mbuf.h> 46#include <sys/rwlock.h> 47#include <sys/socket.h> 48 49#include <net/if.h> 50#include <net/if_var.h> 51#include <net/vnet.h> 52#include <net/pfvar.h> 53#include <net/route.h> 54 55VNET_DEFINE(struct pfi_kif *, pfi_all); 56static VNET_DEFINE(long, pfi_update); 57#define V_pfi_update VNET(pfi_update) 58#define PFI_BUFFER_MAX 0x10000 59 60static VNET_DEFINE(struct pfr_addr *, pfi_buffer); 61static VNET_DEFINE(int, pfi_buffer_cnt); 62static VNET_DEFINE(int, pfi_buffer_max); 63#define V_pfi_buffer VNET(pfi_buffer) 64#define V_pfi_buffer_cnt VNET(pfi_buffer_cnt) 65#define V_pfi_buffer_max VNET(pfi_buffer_max) 66 67eventhandler_tag pfi_attach_cookie; 68eventhandler_tag pfi_detach_cookie; 69eventhandler_tag pfi_attach_group_cookie; 70eventhandler_tag pfi_change_group_cookie; 71eventhandler_tag pfi_detach_group_cookie; 72eventhandler_tag pfi_ifaddr_event_cookie; 73 74static void pfi_attach_ifnet(struct ifnet *); 75static void pfi_attach_ifgroup(struct ifg_group *); 76 77static void pfi_kif_update(struct pfi_kif *); 78static void pfi_dynaddr_update(struct pfi_dynaddr *dyn); 79static void pfi_table_update(struct pfr_ktable *, struct pfi_kif *, int, 80 int); 81static void pfi_instance_add(struct ifnet *, int, int); 82static void pfi_address_add(struct sockaddr *, int, int); 83static int pfi_if_compare(struct pfi_kif *, struct pfi_kif *); 84static int pfi_skip_if(const char *, struct pfi_kif *); 85static int pfi_unmask(void *); 86static void pfi_attach_ifnet_event(void * __unused, struct ifnet *); 87static void pfi_detach_ifnet_event(void * __unused, struct ifnet *); 88static void pfi_attach_group_event(void *, struct ifg_group *); 89static void pfi_change_group_event(void *, char *); 90static void pfi_detach_group_event(void *, struct ifg_group *); 91static void pfi_ifaddr_event(void * __unused, struct ifnet *); 92 93RB_HEAD(pfi_ifhead, pfi_kif); 94static RB_PROTOTYPE(pfi_ifhead, pfi_kif, pfik_tree, pfi_if_compare); 95static RB_GENERATE(pfi_ifhead, pfi_kif, pfik_tree, pfi_if_compare); 96static VNET_DEFINE(struct pfi_ifhead, pfi_ifs); 97#define V_pfi_ifs VNET(pfi_ifs) 98 99#define PFI_BUFFER_MAX 0x10000 100MALLOC_DEFINE(PFI_MTYPE, "pf_ifnet", "pf(4) interface database"); 101 102LIST_HEAD(pfi_list, pfi_kif); 103static VNET_DEFINE(struct pfi_list, pfi_unlinked_kifs); 104#define V_pfi_unlinked_kifs VNET(pfi_unlinked_kifs) 105 106static struct mtx pfi_unlnkdkifs_mtx; 107MTX_SYSINIT(pfi_unlnkdkifs_mtx, &pfi_unlnkdkifs_mtx, "pf unlinked interfaces", 108 MTX_DEF); 109 110void 111pfi_vnet_initialize(void) 112{ 113 struct ifg_group *ifg; 114 struct ifnet *ifp; 115 struct pfi_kif *kif; 116 117 V_pfi_buffer_max = 64; 118 V_pfi_buffer = malloc(V_pfi_buffer_max * sizeof(*V_pfi_buffer), 119 PFI_MTYPE, M_WAITOK); 120 121 if (IS_DEFAULT_VNET(curvnet)) 122 mtx_init(&pfi_unlnkdkifs_mtx, "pf unlinked interfaces", NULL, MTX_DEF); 123 124 kif = malloc(sizeof(*kif), PFI_MTYPE, M_WAITOK); 125 PF_RULES_WLOCK(); 126 V_pfi_all = pfi_kif_attach(kif, IFG_ALL); 127 PF_RULES_WUNLOCK(); 128 129 IFNET_RLOCK(); 130 TAILQ_FOREACH(ifg, &V_ifg_head, ifg_next) 131 pfi_attach_ifgroup(ifg); 132 TAILQ_FOREACH(ifp, &V_ifnet, if_link) 133 pfi_attach_ifnet(ifp); 134 IFNET_RUNLOCK(); 135 136 if (IS_DEFAULT_VNET(curvnet)) { 137 pfi_attach_cookie = EVENTHANDLER_REGISTER(ifnet_arrival_event, 138 pfi_attach_ifnet_event, NULL, EVENTHANDLER_PRI_ANY); 139 pfi_detach_cookie = EVENTHANDLER_REGISTER(ifnet_departure_event, 140 pfi_detach_ifnet_event, NULL, EVENTHANDLER_PRI_ANY); 141 pfi_attach_group_cookie = EVENTHANDLER_REGISTER(group_attach_event, 142 pfi_attach_group_event, curvnet, EVENTHANDLER_PRI_ANY); 143 pfi_change_group_cookie = EVENTHANDLER_REGISTER(group_change_event, 144 pfi_change_group_event, curvnet, EVENTHANDLER_PRI_ANY); 145 pfi_detach_group_cookie = EVENTHANDLER_REGISTER(group_detach_event, 146 pfi_detach_group_event, curvnet, EVENTHANDLER_PRI_ANY); 147 pfi_ifaddr_event_cookie = EVENTHANDLER_REGISTER(ifaddr_event, 148 pfi_ifaddr_event, NULL, EVENTHANDLER_PRI_ANY); 149 } 150} 151 152void 153pfi_cleanup(void) 154{ 155 struct pfi_kif *p; 156 157 EVENTHANDLER_DEREGISTER(ifnet_arrival_event, pfi_attach_cookie); 158 EVENTHANDLER_DEREGISTER(ifnet_departure_event, pfi_detach_cookie); 159 EVENTHANDLER_DEREGISTER(group_attach_event, pfi_attach_group_cookie); 160 EVENTHANDLER_DEREGISTER(group_change_event, pfi_change_group_cookie); 161 EVENTHANDLER_DEREGISTER(group_detach_event, pfi_detach_group_cookie); 162 EVENTHANDLER_DEREGISTER(ifaddr_event, pfi_ifaddr_event_cookie); 163 164 V_pfi_all = NULL; 165 while ((p = RB_MIN(pfi_ifhead, &V_pfi_ifs))) { 166 RB_REMOVE(pfi_ifhead, &V_pfi_ifs, p); 167 free(p, PFI_MTYPE); 168 } 169 170 while ((p = LIST_FIRST(&V_pfi_unlinked_kifs))) { 171 LIST_REMOVE(p, pfik_list); 172 free(p, PFI_MTYPE); 173 } 174 175 free(V_pfi_buffer, PFI_MTYPE); 176} 177 178struct pfi_kif * 179pfi_kif_find(const char *kif_name) 180{ 181 struct pfi_kif_cmp s; 182 183 PF_RULES_ASSERT(); 184 185 bzero(&s, sizeof(s)); 186 strlcpy(s.pfik_name, kif_name, sizeof(s.pfik_name)); 187 188 return (RB_FIND(pfi_ifhead, &V_pfi_ifs, (struct pfi_kif *)&s)); 189} 190 191struct pfi_kif * 192pfi_kif_attach(struct pfi_kif *kif, const char *kif_name) 193{ 194 struct pfi_kif *kif1; 195 196 PF_RULES_WASSERT(); 197 KASSERT(kif != NULL, ("%s: null kif", __func__)); 198 199 kif1 = pfi_kif_find(kif_name); 200 if (kif1 != NULL) { 201 free(kif, PFI_MTYPE); 202 return (kif1); 203 } 204 205 bzero(kif, sizeof(*kif)); 206 strlcpy(kif->pfik_name, kif_name, sizeof(kif->pfik_name)); 207 /* 208 * It seems that the value of time_second is in unintialzied state 209 * when pf sets interface statistics clear time in boot phase if pf 210 * was statically linked to kernel. Instead of setting the bogus 211 * time value have pfi_get_ifaces handle this case. In 212 * pfi_get_ifaces it uses time_second if it sees the time is 0. 213 */ 214 kif->pfik_tzero = time_second > 1 ? time_second : 0; 215 TAILQ_INIT(&kif->pfik_dynaddrs); 216 217 RB_INSERT(pfi_ifhead, &V_pfi_ifs, kif); 218 219 return (kif); 220} 221 222void 223pfi_kif_ref(struct pfi_kif *kif) 224{ 225 226 PF_RULES_WASSERT(); 227 kif->pfik_rulerefs++; 228} 229 230void 231pfi_kif_unref(struct pfi_kif *kif) 232{ 233 234 PF_RULES_WASSERT(); 235 KASSERT(kif->pfik_rulerefs > 0, ("%s: %p has zero refs", __func__, kif)); 236 237 kif->pfik_rulerefs--; 238 239 if (kif->pfik_rulerefs > 0) 240 return; 241 242 /* kif referencing an existing ifnet or group should exist. */ 243 if (kif->pfik_ifp != NULL || kif->pfik_group != NULL || kif == V_pfi_all) 244 return; 245 246 RB_REMOVE(pfi_ifhead, &V_pfi_ifs, kif); 247 248 kif->pfik_flags |= PFI_IFLAG_REFS; 249 250 mtx_lock(&pfi_unlnkdkifs_mtx); 251 LIST_INSERT_HEAD(&V_pfi_unlinked_kifs, kif, pfik_list); 252 mtx_unlock(&pfi_unlnkdkifs_mtx); 253} 254 255void 256pfi_kif_purge(void) 257{ 258 struct pfi_kif *kif, *kif1; 259 260 /* 261 * Do naive mark-and-sweep garbage collecting of old kifs. 262 * Reference flag is raised by pf_purge_expired_states(). 263 */ 264 mtx_lock(&pfi_unlnkdkifs_mtx); 265 LIST_FOREACH_SAFE(kif, &V_pfi_unlinked_kifs, pfik_list, kif1) { 266 if (!(kif->pfik_flags & PFI_IFLAG_REFS)) { 267 LIST_REMOVE(kif, pfik_list); 268 free(kif, PFI_MTYPE); 269 } else 270 kif->pfik_flags &= ~PFI_IFLAG_REFS; 271 } 272 mtx_unlock(&pfi_unlnkdkifs_mtx); 273} 274 275int 276pfi_kif_match(struct pfi_kif *rule_kif, struct pfi_kif *packet_kif) 277{ 278 struct ifg_list *p; 279 280 if (rule_kif == NULL || rule_kif == packet_kif) 281 return (1); 282 283 if (rule_kif->pfik_group != NULL) 284 /* XXXGL: locking? */ 285 TAILQ_FOREACH(p, &packet_kif->pfik_ifp->if_groups, ifgl_next) 286 if (p->ifgl_group == rule_kif->pfik_group) 287 return (1); 288 289 return (0); 290} 291 292static void 293pfi_attach_ifnet(struct ifnet *ifp) 294{ 295 struct pfi_kif *kif; 296 297 kif = malloc(sizeof(*kif), PFI_MTYPE, M_WAITOK); 298 299 PF_RULES_WLOCK(); 300 V_pfi_update++; 301 kif = pfi_kif_attach(kif, ifp->if_xname); 302 303 kif->pfik_ifp = ifp; 304 ifp->if_pf_kif = kif; 305 306 pfi_kif_update(kif); 307 PF_RULES_WUNLOCK(); 308} 309 310static void 311pfi_attach_ifgroup(struct ifg_group *ifg) 312{ 313 struct pfi_kif *kif; 314 315 kif = malloc(sizeof(*kif), PFI_MTYPE, M_WAITOK); 316 317 PF_RULES_WLOCK(); 318 V_pfi_update++; 319 kif = pfi_kif_attach(kif, ifg->ifg_group); 320 321 kif->pfik_group = ifg; 322 ifg->ifg_pf_kif = kif; 323 PF_RULES_WUNLOCK(); 324} 325 326int 327pfi_match_addr(struct pfi_dynaddr *dyn, struct pf_addr *a, sa_family_t af) 328{ 329 switch (af) { 330#ifdef INET 331 case AF_INET: 332 switch (dyn->pfid_acnt4) { 333 case 0: 334 return (0); 335 case 1: 336 return (PF_MATCHA(0, &dyn->pfid_addr4, 337 &dyn->pfid_mask4, a, AF_INET)); 338 default: 339 return (pfr_match_addr(dyn->pfid_kt, a, AF_INET)); 340 } 341 break; 342#endif /* INET */ 343#ifdef INET6 344 case AF_INET6: 345 switch (dyn->pfid_acnt6) { 346 case 0: 347 return (0); 348 case 1: 349 return (PF_MATCHA(0, &dyn->pfid_addr6, 350 &dyn->pfid_mask6, a, AF_INET6)); 351 default: 352 return (pfr_match_addr(dyn->pfid_kt, a, AF_INET6)); 353 } 354 break; 355#endif /* INET6 */ 356 default: 357 return (0); 358 } 359} 360 361int 362pfi_dynaddr_setup(struct pf_addr_wrap *aw, sa_family_t af) 363{ 364 struct pfi_dynaddr *dyn; 365 char tblname[PF_TABLE_NAME_SIZE]; 366 struct pf_ruleset *ruleset = NULL; 367 struct pfi_kif *kif; 368 int rv = 0; 369 370 PF_RULES_WASSERT(); 371 KASSERT(aw->type == PF_ADDR_DYNIFTL, ("%s: type %u", 372 __func__, aw->type)); 373 KASSERT(aw->p.dyn == NULL, ("%s: dyn is %p", __func__, aw->p.dyn)); 374 375 if ((dyn = malloc(sizeof(*dyn), PFI_MTYPE, M_NOWAIT | M_ZERO)) == NULL) 376 return (ENOMEM); 377 378 if ((kif = malloc(sizeof(*kif), PFI_MTYPE, M_NOWAIT)) == NULL) { 379 free(dyn, PFI_MTYPE); 380 return (ENOMEM); 381 } 382 383 if (!strcmp(aw->v.ifname, "self")) 384 dyn->pfid_kif = pfi_kif_attach(kif, IFG_ALL); 385 else 386 dyn->pfid_kif = pfi_kif_attach(kif, aw->v.ifname); 387 pfi_kif_ref(dyn->pfid_kif); 388 389 dyn->pfid_net = pfi_unmask(&aw->v.a.mask); 390 if (af == AF_INET && dyn->pfid_net == 32) 391 dyn->pfid_net = 128; 392 strlcpy(tblname, aw->v.ifname, sizeof(tblname)); 393 if (aw->iflags & PFI_AFLAG_NETWORK) 394 strlcat(tblname, ":network", sizeof(tblname)); 395 if (aw->iflags & PFI_AFLAG_BROADCAST) 396 strlcat(tblname, ":broadcast", sizeof(tblname)); 397 if (aw->iflags & PFI_AFLAG_PEER) 398 strlcat(tblname, ":peer", sizeof(tblname)); 399 if (aw->iflags & PFI_AFLAG_NOALIAS) 400 strlcat(tblname, ":0", sizeof(tblname)); 401 if (dyn->pfid_net != 128) 402 snprintf(tblname + strlen(tblname), 403 sizeof(tblname) - strlen(tblname), "/%d", dyn->pfid_net); 404 if ((ruleset = pf_find_or_create_ruleset(PF_RESERVED_ANCHOR)) == NULL) { 405 rv = ENOMEM; 406 goto _bad; 407 } 408 409 if ((dyn->pfid_kt = pfr_attach_table(ruleset, tblname)) == NULL) { 410 rv = ENOMEM; 411 goto _bad; 412 } 413 414 dyn->pfid_kt->pfrkt_flags |= PFR_TFLAG_ACTIVE; 415 dyn->pfid_iflags = aw->iflags; 416 dyn->pfid_af = af; 417 418 TAILQ_INSERT_TAIL(&dyn->pfid_kif->pfik_dynaddrs, dyn, entry); 419 aw->p.dyn = dyn; 420 pfi_kif_update(dyn->pfid_kif); 421 422 return (0); 423 424_bad: 425 if (dyn->pfid_kt != NULL) 426 pfr_detach_table(dyn->pfid_kt); 427 if (ruleset != NULL) 428 pf_remove_if_empty_ruleset(ruleset); 429 if (dyn->pfid_kif != NULL) 430 pfi_kif_unref(dyn->pfid_kif); 431 free(dyn, PFI_MTYPE); 432 433 return (rv); 434} 435 436static void 437pfi_kif_update(struct pfi_kif *kif) 438{ 439 struct ifg_list *ifgl; 440 struct pfi_dynaddr *p; 441 442 PF_RULES_WASSERT(); 443 444 /* update all dynaddr */ 445 TAILQ_FOREACH(p, &kif->pfik_dynaddrs, entry) 446 pfi_dynaddr_update(p); 447 448 /* again for all groups kif is member of */ 449 if (kif->pfik_ifp != NULL) { 450 IF_ADDR_RLOCK(kif->pfik_ifp); 451 TAILQ_FOREACH(ifgl, &kif->pfik_ifp->if_groups, ifgl_next) 452 pfi_kif_update((struct pfi_kif *) 453 ifgl->ifgl_group->ifg_pf_kif); 454 IF_ADDR_RUNLOCK(kif->pfik_ifp); 455 } 456} 457 458static void 459pfi_dynaddr_update(struct pfi_dynaddr *dyn) 460{ 461 struct pfi_kif *kif; 462 struct pfr_ktable *kt; 463 464 PF_RULES_WASSERT(); 465 KASSERT(dyn && dyn->pfid_kif && dyn->pfid_kt, 466 ("%s: bad argument", __func__)); 467 468 kif = dyn->pfid_kif; 469 kt = dyn->pfid_kt; 470 471 if (kt->pfrkt_larg != V_pfi_update) { 472 /* this table needs to be brought up-to-date */ 473 pfi_table_update(kt, kif, dyn->pfid_net, dyn->pfid_iflags); 474 kt->pfrkt_larg = V_pfi_update; 475 } 476 pfr_dynaddr_update(kt, dyn); 477} 478 479static void 480pfi_table_update(struct pfr_ktable *kt, struct pfi_kif *kif, int net, int flags) 481{ 482 int e, size2 = 0; 483 struct ifg_member *ifgm; 484 485 V_pfi_buffer_cnt = 0; 486 487 if (kif->pfik_ifp != NULL) 488 pfi_instance_add(kif->pfik_ifp, net, flags); 489 else if (kif->pfik_group != NULL) { 490 IFNET_RLOCK_NOSLEEP(); 491 TAILQ_FOREACH(ifgm, &kif->pfik_group->ifg_members, ifgm_next) 492 pfi_instance_add(ifgm->ifgm_ifp, net, flags); 493 IFNET_RUNLOCK_NOSLEEP(); 494 } 495 496 if ((e = pfr_set_addrs(&kt->pfrkt_t, V_pfi_buffer, V_pfi_buffer_cnt, &size2, 497 NULL, NULL, NULL, 0, PFR_TFLAG_ALLMASK))) 498 printf("%s: cannot set %d new addresses into table %s: %d\n", 499 __func__, V_pfi_buffer_cnt, kt->pfrkt_name, e); 500} 501 502static void 503pfi_instance_add(struct ifnet *ifp, int net, int flags) 504{ 505 struct ifaddr *ia; 506 int got4 = 0, got6 = 0; 507 int net2, af; 508 509 IF_ADDR_RLOCK(ifp); 510 TAILQ_FOREACH(ia, &ifp->if_addrhead, ifa_list) { 511 if (ia->ifa_addr == NULL) 512 continue; 513 af = ia->ifa_addr->sa_family; 514 if (af != AF_INET && af != AF_INET6) 515 continue; 516 /* 517 * XXX: For point-to-point interfaces, (ifname:0) and IPv4, 518 * jump over addresses without a proper route to work 519 * around a problem with ppp not fully removing the 520 * address used during IPCP. 521 */ 522 if ((ifp->if_flags & IFF_POINTOPOINT) && 523 !(ia->ifa_flags & IFA_ROUTE) && 524 (flags & PFI_AFLAG_NOALIAS) && (af == AF_INET)) 525 continue; 526 if ((flags & PFI_AFLAG_BROADCAST) && af == AF_INET6) 527 continue; 528 if ((flags & PFI_AFLAG_BROADCAST) && 529 !(ifp->if_flags & IFF_BROADCAST)) 530 continue; 531 if ((flags & PFI_AFLAG_PEER) && 532 !(ifp->if_flags & IFF_POINTOPOINT)) 533 continue; 534 if ((flags & PFI_AFLAG_NETWORK) && af == AF_INET6 && 535 IN6_IS_ADDR_LINKLOCAL( 536 &((struct sockaddr_in6 *)ia->ifa_addr)->sin6_addr)) 537 continue; 538 if (flags & PFI_AFLAG_NOALIAS) { 539 if (af == AF_INET && got4) 540 continue; 541 if (af == AF_INET6 && got6) 542 continue; 543 } 544 if (af == AF_INET) 545 got4 = 1; 546 else if (af == AF_INET6) 547 got6 = 1; 548 net2 = net; 549 if (net2 == 128 && (flags & PFI_AFLAG_NETWORK)) { 550 if (af == AF_INET) 551 net2 = pfi_unmask(&((struct sockaddr_in *) 552 ia->ifa_netmask)->sin_addr); 553 else if (af == AF_INET6) 554 net2 = pfi_unmask(&((struct sockaddr_in6 *) 555 ia->ifa_netmask)->sin6_addr); 556 } 557 if (af == AF_INET && net2 > 32) 558 net2 = 32; 559 if (flags & PFI_AFLAG_BROADCAST) 560 pfi_address_add(ia->ifa_broadaddr, af, net2); 561 else if (flags & PFI_AFLAG_PEER) 562 pfi_address_add(ia->ifa_dstaddr, af, net2); 563 else 564 pfi_address_add(ia->ifa_addr, af, net2); 565 } 566 IF_ADDR_RUNLOCK(ifp); 567} 568 569static void 570pfi_address_add(struct sockaddr *sa, int af, int net) 571{ 572 struct pfr_addr *p; 573 int i; 574 575 if (V_pfi_buffer_cnt >= V_pfi_buffer_max) { 576 int new_max = V_pfi_buffer_max * 2; 577 578 if (new_max > PFI_BUFFER_MAX) { 579 printf("%s: address buffer full (%d/%d)\n", __func__, 580 V_pfi_buffer_cnt, PFI_BUFFER_MAX); 581 return; 582 } 583 p = malloc(new_max * sizeof(*V_pfi_buffer), PFI_MTYPE, 584 M_NOWAIT); 585 if (p == NULL) { 586 printf("%s: no memory to grow buffer (%d/%d)\n", 587 __func__, V_pfi_buffer_cnt, PFI_BUFFER_MAX); 588 return; 589 } 590 memcpy(V_pfi_buffer, p, V_pfi_buffer_cnt * sizeof(*V_pfi_buffer)); 591 /* no need to zero buffer */ 592 free(V_pfi_buffer, PFI_MTYPE); 593 V_pfi_buffer = p; 594 V_pfi_buffer_max = new_max; 595 } 596 if (af == AF_INET && net > 32) 597 net = 128; 598 p = V_pfi_buffer + V_pfi_buffer_cnt++; 599 bzero(p, sizeof(*p)); 600 p->pfra_af = af; 601 p->pfra_net = net; 602 if (af == AF_INET) 603 p->pfra_ip4addr = ((struct sockaddr_in *)sa)->sin_addr; 604 else if (af == AF_INET6) { 605 p->pfra_ip6addr = ((struct sockaddr_in6 *)sa)->sin6_addr; 606 if (IN6_IS_SCOPE_EMBED(&p->pfra_ip6addr)) 607 p->pfra_ip6addr.s6_addr16[1] = 0; 608 } 609 /* mask network address bits */ 610 if (net < 128) 611 ((caddr_t)p)[p->pfra_net/8] &= ~(0xFF >> (p->pfra_net%8)); 612 for (i = (p->pfra_net+7)/8; i < sizeof(p->pfra_u); i++) 613 ((caddr_t)p)[i] = 0; 614} 615 616void 617pfi_dynaddr_remove(struct pfi_dynaddr *dyn) 618{ 619 620 KASSERT(dyn->pfid_kif != NULL, ("%s: null pfid_kif", __func__)); 621 KASSERT(dyn->pfid_kt != NULL, ("%s: null pfid_kt", __func__)); 622 623 TAILQ_REMOVE(&dyn->pfid_kif->pfik_dynaddrs, dyn, entry); 624 pfi_kif_unref(dyn->pfid_kif); 625 pfr_detach_table(dyn->pfid_kt); 626 free(dyn, PFI_MTYPE); 627} 628 629void 630pfi_dynaddr_copyout(struct pf_addr_wrap *aw) 631{ 632 633 KASSERT(aw->type == PF_ADDR_DYNIFTL, 634 ("%s: type %u", __func__, aw->type)); 635 636 if (aw->p.dyn == NULL || aw->p.dyn->pfid_kif == NULL) 637 return; 638 aw->p.dyncnt = aw->p.dyn->pfid_acnt4 + aw->p.dyn->pfid_acnt6; 639} 640 641static int 642pfi_if_compare(struct pfi_kif *p, struct pfi_kif *q) 643{ 644 return (strncmp(p->pfik_name, q->pfik_name, IFNAMSIZ)); 645} 646 647void 648pfi_update_status(const char *name, struct pf_status *pfs) 649{ 650 struct pfi_kif *p; 651 struct pfi_kif_cmp key; 652 struct ifg_member p_member, *ifgm; 653 TAILQ_HEAD(, ifg_member) ifg_members; 654 int i, j, k; 655 656 strlcpy(key.pfik_name, name, sizeof(key.pfik_name)); 657 p = RB_FIND(pfi_ifhead, &V_pfi_ifs, (struct pfi_kif *)&key); 658 if (p == NULL) 659 return; 660 661 if (p->pfik_group != NULL) { 662 bcopy(&p->pfik_group->ifg_members, &ifg_members, 663 sizeof(ifg_members)); 664 } else { 665 /* build a temporary list for p only */ 666 bzero(&p_member, sizeof(p_member)); 667 p_member.ifgm_ifp = p->pfik_ifp; 668 TAILQ_INIT(&ifg_members); 669 TAILQ_INSERT_TAIL(&ifg_members, &p_member, ifgm_next); 670 } 671 if (pfs) { 672 bzero(pfs->pcounters, sizeof(pfs->pcounters)); 673 bzero(pfs->bcounters, sizeof(pfs->bcounters)); 674 } 675 TAILQ_FOREACH(ifgm, &ifg_members, ifgm_next) { 676 if (ifgm->ifgm_ifp == NULL) 677 continue; 678 p = (struct pfi_kif *)ifgm->ifgm_ifp->if_pf_kif; 679 680 /* just clear statistics */ 681 if (pfs == NULL) { 682 bzero(p->pfik_packets, sizeof(p->pfik_packets)); 683 bzero(p->pfik_bytes, sizeof(p->pfik_bytes)); 684 p->pfik_tzero = time_second; 685 continue; 686 } 687 for (i = 0; i < 2; i++) 688 for (j = 0; j < 2; j++) 689 for (k = 0; k < 2; k++) { 690 pfs->pcounters[i][j][k] += 691 p->pfik_packets[i][j][k]; 692 pfs->bcounters[i][j] += 693 p->pfik_bytes[i][j][k]; 694 } 695 } 696} 697 698void 699pfi_get_ifaces(const char *name, struct pfi_kif *buf, int *size) 700{ 701 struct pfi_kif *p, *nextp; 702 int n = 0; 703 704 for (p = RB_MIN(pfi_ifhead, &V_pfi_ifs); p; p = nextp) { 705 nextp = RB_NEXT(pfi_ifhead, &V_pfi_ifs, p); 706 if (pfi_skip_if(name, p)) 707 continue; 708 if (*size <= n++) 709 break; 710 if (!p->pfik_tzero) 711 p->pfik_tzero = time_second; 712 bcopy(p, buf++, sizeof(*buf)); 713 nextp = RB_NEXT(pfi_ifhead, &V_pfi_ifs, p); 714 } 715 *size = n; 716} 717 718static int 719pfi_skip_if(const char *filter, struct pfi_kif *p) 720{ 721 int n; 722 723 if (filter == NULL || !*filter) 724 return (0); 725 if (!strcmp(p->pfik_name, filter)) 726 return (0); /* exact match */ 727 n = strlen(filter); 728 if (n < 1 || n >= IFNAMSIZ) 729 return (1); /* sanity check */ 730 if (filter[n-1] >= '0' && filter[n-1] <= '9') 731 return (1); /* only do exact match in that case */ 732 if (strncmp(p->pfik_name, filter, n)) 733 return (1); /* prefix doesn't match */ 734 return (p->pfik_name[n] < '0' || p->pfik_name[n] > '9'); 735} 736 737int 738pfi_set_flags(const char *name, int flags) 739{ 740 struct pfi_kif *p; 741 742 RB_FOREACH(p, pfi_ifhead, &V_pfi_ifs) { 743 if (pfi_skip_if(name, p)) 744 continue; 745 p->pfik_flags |= flags; 746 } 747 return (0); 748} 749 750int 751pfi_clear_flags(const char *name, int flags) 752{ 753 struct pfi_kif *p; 754 755 RB_FOREACH(p, pfi_ifhead, &V_pfi_ifs) { 756 if (pfi_skip_if(name, p)) 757 continue; 758 p->pfik_flags &= ~flags; 759 } 760 return (0); 761} 762 763/* from pf_print_state.c */ 764static int 765pfi_unmask(void *addr) 766{ 767 struct pf_addr *m = addr; 768 int i = 31, j = 0, b = 0; 769 u_int32_t tmp; 770 771 while (j < 4 && m->addr32[j] == 0xffffffff) { 772 b += 32; 773 j++; 774 } 775 if (j < 4) { 776 tmp = ntohl(m->addr32[j]); 777 for (i = 31; tmp & (1 << i); --i) 778 b++; 779 } 780 return (b); 781} 782 783static void 784pfi_attach_ifnet_event(void *arg __unused, struct ifnet *ifp) 785{ 786 787 CURVNET_SET(ifp->if_vnet); 788 pfi_attach_ifnet(ifp); 789#ifdef ALTQ 790 PF_RULES_WLOCK(); 791 pf_altq_ifnet_event(ifp, 0); 792 PF_RULES_WUNLOCK(); 793#endif 794 CURVNET_RESTORE(); 795} 796 797static void 798pfi_detach_ifnet_event(void *arg __unused, struct ifnet *ifp) 799{ 800 struct pfi_kif *kif = (struct pfi_kif *)ifp->if_pf_kif; 801 802 CURVNET_SET(ifp->if_vnet); 803 PF_RULES_WLOCK(); 804 V_pfi_update++; 805 pfi_kif_update(kif); 806 807 kif->pfik_ifp = NULL; 808 ifp->if_pf_kif = NULL; 809#ifdef ALTQ 810 pf_altq_ifnet_event(ifp, 1); 811#endif 812 PF_RULES_WUNLOCK(); 813 CURVNET_RESTORE(); 814} 815 816static void 817pfi_attach_group_event(void *arg , struct ifg_group *ifg) 818{ 819 820 CURVNET_SET((struct vnet *)arg); 821 pfi_attach_ifgroup(ifg); 822 CURVNET_RESTORE(); 823} 824 825static void 826pfi_change_group_event(void *arg, char *gname) 827{ 828 struct pfi_kif *kif; 829 830 kif = malloc(sizeof(*kif), PFI_MTYPE, M_WAITOK); 831 832 CURVNET_SET((struct vnet *)arg); 833 PF_RULES_WLOCK(); 834 V_pfi_update++; 835 kif = pfi_kif_attach(kif, gname); 836 pfi_kif_update(kif); 837 PF_RULES_WUNLOCK(); 838 CURVNET_RESTORE(); 839} 840 841static void 842pfi_detach_group_event(void *arg, struct ifg_group *ifg) 843{ 844 struct pfi_kif *kif = (struct pfi_kif *)ifg->ifg_pf_kif; 845 846 CURVNET_SET((struct vnet *)arg); 847 PF_RULES_WLOCK(); 848 V_pfi_update++; 849 850 kif->pfik_group = NULL; 851 ifg->ifg_pf_kif = NULL; 852 PF_RULES_WUNLOCK(); 853 CURVNET_RESTORE(); 854} 855 856static void 857pfi_ifaddr_event(void *arg __unused, struct ifnet *ifp) 858{ 859 860 CURVNET_SET(ifp->if_vnet); 861 PF_RULES_WLOCK(); 862 if (ifp && ifp->if_pf_kif) { 863 V_pfi_update++; 864 pfi_kif_update(ifp->if_pf_kif); 865 } 866 PF_RULES_WUNLOCK(); 867 CURVNET_RESTORE(); 868} 869