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: stable/11/sys/netpfil/pf/pf_if.c 344964 2019-03-09 10:28:36Z kp $"); 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/eventhandler.h> 45#include <sys/lock.h> 46#include <sys/mbuf.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 60VNET_DECLARE(int, pf_vnet_active); 61#define V_pf_vnet_active VNET(pf_vnet_active) 62 63static VNET_DEFINE(struct pfr_addr *, pfi_buffer); 64static VNET_DEFINE(int, pfi_buffer_cnt); 65static VNET_DEFINE(int, pfi_buffer_max); 66#define V_pfi_buffer VNET(pfi_buffer) 67#define V_pfi_buffer_cnt VNET(pfi_buffer_cnt) 68#define V_pfi_buffer_max VNET(pfi_buffer_max) 69 70eventhandler_tag pfi_attach_cookie; 71eventhandler_tag pfi_detach_cookie; 72eventhandler_tag pfi_attach_group_cookie; 73eventhandler_tag pfi_change_group_cookie; 74eventhandler_tag pfi_detach_group_cookie; 75eventhandler_tag pfi_ifaddr_event_cookie; 76 77static void pfi_attach_ifnet(struct ifnet *); 78static void pfi_attach_ifgroup(struct ifg_group *); 79 80static void pfi_kif_update(struct pfi_kif *); 81static void pfi_dynaddr_update(struct pfi_dynaddr *dyn); 82static void pfi_table_update(struct pfr_ktable *, struct pfi_kif *, int, 83 int); 84static void pfi_instance_add(struct ifnet *, int, int); 85static void pfi_address_add(struct sockaddr *, int, int); 86static int pfi_if_compare(struct pfi_kif *, struct pfi_kif *); 87static int pfi_skip_if(const char *, struct pfi_kif *); 88static int pfi_unmask(void *); 89static void pfi_attach_ifnet_event(void * __unused, struct ifnet *); 90static void pfi_detach_ifnet_event(void * __unused, struct ifnet *); 91static void pfi_attach_group_event(void *, struct ifg_group *); 92static void pfi_change_group_event(void *, char *); 93static void pfi_detach_group_event(void *, struct ifg_group *); 94static void pfi_ifaddr_event(void * __unused, struct ifnet *); 95 96RB_HEAD(pfi_ifhead, pfi_kif); 97static RB_PROTOTYPE(pfi_ifhead, pfi_kif, pfik_tree, pfi_if_compare); 98static RB_GENERATE(pfi_ifhead, pfi_kif, pfik_tree, pfi_if_compare); 99static VNET_DEFINE(struct pfi_ifhead, pfi_ifs); 100#define V_pfi_ifs VNET(pfi_ifs) 101 102#define PFI_BUFFER_MAX 0x10000 103MALLOC_DEFINE(PFI_MTYPE, "pf_ifnet", "pf(4) interface database"); 104 105LIST_HEAD(pfi_list, pfi_kif); 106static VNET_DEFINE(struct pfi_list, pfi_unlinked_kifs); 107#define V_pfi_unlinked_kifs VNET(pfi_unlinked_kifs) 108static struct mtx pfi_unlnkdkifs_mtx; 109MTX_SYSINIT(pfi_unlnkdkifs_mtx, &pfi_unlnkdkifs_mtx, "pf unlinked interfaces", 110 MTX_DEF); 111 112void 113pfi_initialize_vnet(void) 114{ 115 struct ifg_group *ifg; 116 struct ifnet *ifp; 117 struct pfi_kif *kif; 118 119 V_pfi_buffer_max = 64; 120 V_pfi_buffer = malloc(V_pfi_buffer_max * sizeof(*V_pfi_buffer), 121 PFI_MTYPE, M_WAITOK); 122 123 kif = malloc(sizeof(*kif), PFI_MTYPE, M_WAITOK); 124 PF_RULES_WLOCK(); 125 V_pfi_all = pfi_kif_attach(kif, IFG_ALL); 126 PF_RULES_WUNLOCK(); 127 128 IFNET_RLOCK(); 129 TAILQ_FOREACH(ifg, &V_ifg_head, ifg_next) 130 pfi_attach_ifgroup(ifg); 131 TAILQ_FOREACH(ifp, &V_ifnet, if_link) 132 pfi_attach_ifnet(ifp); 133 IFNET_RUNLOCK(); 134} 135 136void 137pfi_initialize(void) 138{ 139 140 pfi_attach_cookie = EVENTHANDLER_REGISTER(ifnet_arrival_event, 141 pfi_attach_ifnet_event, NULL, EVENTHANDLER_PRI_ANY); 142 pfi_detach_cookie = EVENTHANDLER_REGISTER(ifnet_departure_event, 143 pfi_detach_ifnet_event, NULL, EVENTHANDLER_PRI_ANY); 144 pfi_attach_group_cookie = EVENTHANDLER_REGISTER(group_attach_event, 145 pfi_attach_group_event, curvnet, EVENTHANDLER_PRI_ANY); 146 pfi_change_group_cookie = EVENTHANDLER_REGISTER(group_change_event, 147 pfi_change_group_event, curvnet, EVENTHANDLER_PRI_ANY); 148 pfi_detach_group_cookie = EVENTHANDLER_REGISTER(group_detach_event, 149 pfi_detach_group_event, curvnet, EVENTHANDLER_PRI_ANY); 150 pfi_ifaddr_event_cookie = EVENTHANDLER_REGISTER(ifaddr_event, 151 pfi_ifaddr_event, NULL, EVENTHANDLER_PRI_ANY); 152} 153 154void 155pfi_cleanup_vnet(void) 156{ 157 struct pfi_kif *kif; 158 159 PF_RULES_WASSERT(); 160 161 V_pfi_all = NULL; 162 while ((kif = RB_MIN(pfi_ifhead, &V_pfi_ifs))) { 163 RB_REMOVE(pfi_ifhead, &V_pfi_ifs, kif); 164 if (kif->pfik_group) 165 kif->pfik_group->ifg_pf_kif = NULL; 166 if (kif->pfik_ifp) { 167 if_rele(kif->pfik_ifp); 168 kif->pfik_ifp->if_pf_kif = NULL; 169 } 170 free(kif, PFI_MTYPE); 171 } 172 173 mtx_lock(&pfi_unlnkdkifs_mtx); 174 while ((kif = LIST_FIRST(&V_pfi_unlinked_kifs))) { 175 LIST_REMOVE(kif, pfik_list); 176 free(kif, PFI_MTYPE); 177 } 178 mtx_unlock(&pfi_unlnkdkifs_mtx); 179 180 free(V_pfi_buffer, PFI_MTYPE); 181} 182 183void 184pfi_cleanup(void) 185{ 186 187 EVENTHANDLER_DEREGISTER(ifnet_arrival_event, pfi_attach_cookie); 188 EVENTHANDLER_DEREGISTER(ifnet_departure_event, pfi_detach_cookie); 189 EVENTHANDLER_DEREGISTER(group_attach_event, pfi_attach_group_cookie); 190 EVENTHANDLER_DEREGISTER(group_change_event, pfi_change_group_cookie); 191 EVENTHANDLER_DEREGISTER(group_detach_event, pfi_detach_group_cookie); 192 EVENTHANDLER_DEREGISTER(ifaddr_event, pfi_ifaddr_event_cookie); 193} 194 195struct pfi_kif * 196pfi_kif_find(const char *kif_name) 197{ 198 struct pfi_kif_cmp s; 199 200 PF_RULES_ASSERT(); 201 202 bzero(&s, sizeof(s)); 203 strlcpy(s.pfik_name, kif_name, sizeof(s.pfik_name)); 204 205 return (RB_FIND(pfi_ifhead, &V_pfi_ifs, (struct pfi_kif *)&s)); 206} 207 208struct pfi_kif * 209pfi_kif_attach(struct pfi_kif *kif, const char *kif_name) 210{ 211 struct pfi_kif *kif1; 212 213 PF_RULES_WASSERT(); 214 KASSERT(kif != NULL, ("%s: null kif", __func__)); 215 216 kif1 = pfi_kif_find(kif_name); 217 if (kif1 != NULL) { 218 free(kif, PFI_MTYPE); 219 return (kif1); 220 } 221 222 bzero(kif, sizeof(*kif)); 223 strlcpy(kif->pfik_name, kif_name, sizeof(kif->pfik_name)); 224 /* 225 * It seems that the value of time_second is in unintialzied state 226 * when pf sets interface statistics clear time in boot phase if pf 227 * was statically linked to kernel. Instead of setting the bogus 228 * time value have pfi_get_ifaces handle this case. In 229 * pfi_get_ifaces it uses time_second if it sees the time is 0. 230 */ 231 kif->pfik_tzero = time_second > 1 ? time_second : 0; 232 TAILQ_INIT(&kif->pfik_dynaddrs); 233 234 RB_INSERT(pfi_ifhead, &V_pfi_ifs, kif); 235 236 return (kif); 237} 238 239void 240pfi_kif_ref(struct pfi_kif *kif) 241{ 242 243 PF_RULES_WASSERT(); 244 kif->pfik_rulerefs++; 245} 246 247void 248pfi_kif_unref(struct pfi_kif *kif) 249{ 250 251 PF_RULES_WASSERT(); 252 KASSERT(kif->pfik_rulerefs > 0, ("%s: %p has zero refs", __func__, kif)); 253 254 kif->pfik_rulerefs--; 255 256 if (kif->pfik_rulerefs > 0) 257 return; 258 259 /* kif referencing an existing ifnet or group should exist. */ 260 if (kif->pfik_ifp != NULL || kif->pfik_group != NULL || kif == V_pfi_all) 261 return; 262 263 RB_REMOVE(pfi_ifhead, &V_pfi_ifs, kif); 264 265 kif->pfik_flags |= PFI_IFLAG_REFS; 266 267 mtx_lock(&pfi_unlnkdkifs_mtx); 268 LIST_INSERT_HEAD(&V_pfi_unlinked_kifs, kif, pfik_list); 269 mtx_unlock(&pfi_unlnkdkifs_mtx); 270} 271 272void 273pfi_kif_purge(void) 274{ 275 struct pfi_kif *kif, *kif1; 276 277 /* 278 * Do naive mark-and-sweep garbage collecting of old kifs. 279 * Reference flag is raised by pf_purge_expired_states(). 280 */ 281 mtx_lock(&pfi_unlnkdkifs_mtx); 282 LIST_FOREACH_SAFE(kif, &V_pfi_unlinked_kifs, pfik_list, kif1) { 283 if (!(kif->pfik_flags & PFI_IFLAG_REFS)) { 284 LIST_REMOVE(kif, pfik_list); 285 free(kif, PFI_MTYPE); 286 } else 287 kif->pfik_flags &= ~PFI_IFLAG_REFS; 288 } 289 mtx_unlock(&pfi_unlnkdkifs_mtx); 290} 291 292int 293pfi_kif_match(struct pfi_kif *rule_kif, struct pfi_kif *packet_kif) 294{ 295 struct ifg_list *p; 296 297 if (rule_kif == NULL || rule_kif == packet_kif) 298 return (1); 299 300 if (rule_kif->pfik_group != NULL) 301 /* XXXGL: locking? */ 302 TAILQ_FOREACH(p, &packet_kif->pfik_ifp->if_groups, ifgl_next) 303 if (p->ifgl_group == rule_kif->pfik_group) 304 return (1); 305 306 return (0); 307} 308 309static void 310pfi_attach_ifnet(struct ifnet *ifp) 311{ 312 struct pfi_kif *kif; 313 314 kif = malloc(sizeof(*kif), PFI_MTYPE, M_WAITOK); 315 316 PF_RULES_WLOCK(); 317 V_pfi_update++; 318 kif = pfi_kif_attach(kif, ifp->if_xname); 319 320 if_ref(ifp); 321 322 kif->pfik_ifp = ifp; 323 ifp->if_pf_kif = kif; 324 325 pfi_kif_update(kif); 326 PF_RULES_WUNLOCK(); 327} 328 329static void 330pfi_attach_ifgroup(struct ifg_group *ifg) 331{ 332 struct pfi_kif *kif; 333 334 kif = malloc(sizeof(*kif), PFI_MTYPE, M_WAITOK); 335 336 PF_RULES_WLOCK(); 337 V_pfi_update++; 338 kif = pfi_kif_attach(kif, ifg->ifg_group); 339 340 kif->pfik_group = ifg; 341 ifg->ifg_pf_kif = kif; 342 PF_RULES_WUNLOCK(); 343} 344 345int 346pfi_match_addr(struct pfi_dynaddr *dyn, struct pf_addr *a, sa_family_t af) 347{ 348 switch (af) { 349#ifdef INET 350 case AF_INET: 351 switch (dyn->pfid_acnt4) { 352 case 0: 353 return (0); 354 case 1: 355 return (PF_MATCHA(0, &dyn->pfid_addr4, 356 &dyn->pfid_mask4, a, AF_INET)); 357 default: 358 return (pfr_match_addr(dyn->pfid_kt, a, AF_INET)); 359 } 360 break; 361#endif /* INET */ 362#ifdef INET6 363 case AF_INET6: 364 switch (dyn->pfid_acnt6) { 365 case 0: 366 return (0); 367 case 1: 368 return (PF_MATCHA(0, &dyn->pfid_addr6, 369 &dyn->pfid_mask6, a, AF_INET6)); 370 default: 371 return (pfr_match_addr(dyn->pfid_kt, a, AF_INET6)); 372 } 373 break; 374#endif /* INET6 */ 375 default: 376 return (0); 377 } 378} 379 380int 381pfi_dynaddr_setup(struct pf_addr_wrap *aw, sa_family_t af) 382{ 383 struct pfi_dynaddr *dyn; 384 char tblname[PF_TABLE_NAME_SIZE]; 385 struct pf_ruleset *ruleset = NULL; 386 struct pfi_kif *kif; 387 int rv = 0; 388 389 PF_RULES_WASSERT(); 390 KASSERT(aw->type == PF_ADDR_DYNIFTL, ("%s: type %u", 391 __func__, aw->type)); 392 KASSERT(aw->p.dyn == NULL, ("%s: dyn is %p", __func__, aw->p.dyn)); 393 394 if ((dyn = malloc(sizeof(*dyn), PFI_MTYPE, M_NOWAIT | M_ZERO)) == NULL) 395 return (ENOMEM); 396 397 if ((kif = malloc(sizeof(*kif), PFI_MTYPE, M_NOWAIT)) == NULL) { 398 free(dyn, PFI_MTYPE); 399 return (ENOMEM); 400 } 401 402 if (!strcmp(aw->v.ifname, "self")) 403 dyn->pfid_kif = pfi_kif_attach(kif, IFG_ALL); 404 else 405 dyn->pfid_kif = pfi_kif_attach(kif, aw->v.ifname); 406 pfi_kif_ref(dyn->pfid_kif); 407 408 dyn->pfid_net = pfi_unmask(&aw->v.a.mask); 409 if (af == AF_INET && dyn->pfid_net == 32) 410 dyn->pfid_net = 128; 411 strlcpy(tblname, aw->v.ifname, sizeof(tblname)); 412 if (aw->iflags & PFI_AFLAG_NETWORK) 413 strlcat(tblname, ":network", sizeof(tblname)); 414 if (aw->iflags & PFI_AFLAG_BROADCAST) 415 strlcat(tblname, ":broadcast", sizeof(tblname)); 416 if (aw->iflags & PFI_AFLAG_PEER) 417 strlcat(tblname, ":peer", sizeof(tblname)); 418 if (aw->iflags & PFI_AFLAG_NOALIAS) 419 strlcat(tblname, ":0", sizeof(tblname)); 420 if (dyn->pfid_net != 128) 421 snprintf(tblname + strlen(tblname), 422 sizeof(tblname) - strlen(tblname), "/%d", dyn->pfid_net); 423 if ((ruleset = pf_find_or_create_ruleset(PF_RESERVED_ANCHOR)) == NULL) { 424 rv = ENOMEM; 425 goto _bad; 426 } 427 428 if ((dyn->pfid_kt = pfr_attach_table(ruleset, tblname)) == NULL) { 429 rv = ENOMEM; 430 goto _bad; 431 } 432 433 dyn->pfid_kt->pfrkt_flags |= PFR_TFLAG_ACTIVE; 434 dyn->pfid_iflags = aw->iflags; 435 dyn->pfid_af = af; 436 437 TAILQ_INSERT_TAIL(&dyn->pfid_kif->pfik_dynaddrs, dyn, entry); 438 aw->p.dyn = dyn; 439 pfi_kif_update(dyn->pfid_kif); 440 441 return (0); 442 443_bad: 444 if (dyn->pfid_kt != NULL) 445 pfr_detach_table(dyn->pfid_kt); 446 if (ruleset != NULL) 447 pf_remove_if_empty_ruleset(ruleset); 448 if (dyn->pfid_kif != NULL) 449 pfi_kif_unref(dyn->pfid_kif); 450 free(dyn, PFI_MTYPE); 451 452 return (rv); 453} 454 455static void 456pfi_kif_update(struct pfi_kif *kif) 457{ 458 struct ifg_list *ifgl; 459 struct pfi_dynaddr *p; 460 461 PF_RULES_WASSERT(); 462 463 /* update all dynaddr */ 464 TAILQ_FOREACH(p, &kif->pfik_dynaddrs, entry) 465 pfi_dynaddr_update(p); 466 467 /* again for all groups kif is member of */ 468 if (kif->pfik_ifp != NULL) { 469 IF_ADDR_RLOCK(kif->pfik_ifp); 470 TAILQ_FOREACH(ifgl, &kif->pfik_ifp->if_groups, ifgl_next) 471 pfi_kif_update((struct pfi_kif *) 472 ifgl->ifgl_group->ifg_pf_kif); 473 IF_ADDR_RUNLOCK(kif->pfik_ifp); 474 } 475} 476 477static void 478pfi_dynaddr_update(struct pfi_dynaddr *dyn) 479{ 480 struct pfi_kif *kif; 481 struct pfr_ktable *kt; 482 483 PF_RULES_WASSERT(); 484 KASSERT(dyn && dyn->pfid_kif && dyn->pfid_kt, 485 ("%s: bad argument", __func__)); 486 487 kif = dyn->pfid_kif; 488 kt = dyn->pfid_kt; 489 490 if (kt->pfrkt_larg != V_pfi_update) { 491 /* this table needs to be brought up-to-date */ 492 pfi_table_update(kt, kif, dyn->pfid_net, dyn->pfid_iflags); 493 kt->pfrkt_larg = V_pfi_update; 494 } 495 pfr_dynaddr_update(kt, dyn); 496} 497 498static void 499pfi_table_update(struct pfr_ktable *kt, struct pfi_kif *kif, int net, int flags) 500{ 501 int e, size2 = 0; 502 struct ifg_member *ifgm; 503 504 V_pfi_buffer_cnt = 0; 505 506 if (kif->pfik_ifp != NULL) 507 pfi_instance_add(kif->pfik_ifp, net, flags); 508 else if (kif->pfik_group != NULL) { 509 IFNET_RLOCK_NOSLEEP(); 510 TAILQ_FOREACH(ifgm, &kif->pfik_group->ifg_members, ifgm_next) 511 pfi_instance_add(ifgm->ifgm_ifp, net, flags); 512 IFNET_RUNLOCK_NOSLEEP(); 513 } 514 515 if ((e = pfr_set_addrs(&kt->pfrkt_t, V_pfi_buffer, V_pfi_buffer_cnt, &size2, 516 NULL, NULL, NULL, 0, PFR_TFLAG_ALLMASK))) 517 printf("%s: cannot set %d new addresses into table %s: %d\n", 518 __func__, V_pfi_buffer_cnt, kt->pfrkt_name, e); 519} 520 521static void 522pfi_instance_add(struct ifnet *ifp, int net, int flags) 523{ 524 struct ifaddr *ia; 525 int got4 = 0, got6 = 0; 526 int net2, af; 527 528 IF_ADDR_RLOCK(ifp); 529 TAILQ_FOREACH(ia, &ifp->if_addrhead, ifa_list) { 530 if (ia->ifa_addr == NULL) 531 continue; 532 af = ia->ifa_addr->sa_family; 533 if (af != AF_INET && af != AF_INET6) 534 continue; 535 /* 536 * XXX: For point-to-point interfaces, (ifname:0) and IPv4, 537 * jump over addresses without a proper route to work 538 * around a problem with ppp not fully removing the 539 * address used during IPCP. 540 */ 541 if ((ifp->if_flags & IFF_POINTOPOINT) && 542 !(ia->ifa_flags & IFA_ROUTE) && 543 (flags & PFI_AFLAG_NOALIAS) && (af == AF_INET)) 544 continue; 545 if ((flags & PFI_AFLAG_BROADCAST) && af == AF_INET6) 546 continue; 547 if ((flags & PFI_AFLAG_BROADCAST) && 548 !(ifp->if_flags & IFF_BROADCAST)) 549 continue; 550 if ((flags & PFI_AFLAG_PEER) && 551 !(ifp->if_flags & IFF_POINTOPOINT)) 552 continue; 553 if ((flags & PFI_AFLAG_NETWORK) && af == AF_INET6 && 554 IN6_IS_ADDR_LINKLOCAL( 555 &((struct sockaddr_in6 *)ia->ifa_addr)->sin6_addr)) 556 continue; 557 if (flags & PFI_AFLAG_NOALIAS) { 558 if (af == AF_INET && got4) 559 continue; 560 if (af == AF_INET6 && got6) 561 continue; 562 } 563 if (af == AF_INET) 564 got4 = 1; 565 else if (af == AF_INET6) 566 got6 = 1; 567 net2 = net; 568 if (net2 == 128 && (flags & PFI_AFLAG_NETWORK)) { 569 if (af == AF_INET) 570 net2 = pfi_unmask(&((struct sockaddr_in *) 571 ia->ifa_netmask)->sin_addr); 572 else if (af == AF_INET6) 573 net2 = pfi_unmask(&((struct sockaddr_in6 *) 574 ia->ifa_netmask)->sin6_addr); 575 } 576 if (af == AF_INET && net2 > 32) 577 net2 = 32; 578 if (flags & PFI_AFLAG_BROADCAST) 579 pfi_address_add(ia->ifa_broadaddr, af, net2); 580 else if (flags & PFI_AFLAG_PEER) 581 pfi_address_add(ia->ifa_dstaddr, af, net2); 582 else 583 pfi_address_add(ia->ifa_addr, af, net2); 584 } 585 IF_ADDR_RUNLOCK(ifp); 586} 587 588static void 589pfi_address_add(struct sockaddr *sa, int af, int net) 590{ 591 struct pfr_addr *p; 592 int i; 593 594 if (V_pfi_buffer_cnt >= V_pfi_buffer_max) { 595 int new_max = V_pfi_buffer_max * 2; 596 597 if (new_max > PFI_BUFFER_MAX) { 598 printf("%s: address buffer full (%d/%d)\n", __func__, 599 V_pfi_buffer_cnt, PFI_BUFFER_MAX); 600 return; 601 } 602 p = malloc(new_max * sizeof(*V_pfi_buffer), PFI_MTYPE, 603 M_NOWAIT); 604 if (p == NULL) { 605 printf("%s: no memory to grow buffer (%d/%d)\n", 606 __func__, V_pfi_buffer_cnt, PFI_BUFFER_MAX); 607 return; 608 } 609 memcpy(p, V_pfi_buffer, V_pfi_buffer_max * sizeof(*V_pfi_buffer)); 610 /* no need to zero buffer */ 611 free(V_pfi_buffer, PFI_MTYPE); 612 V_pfi_buffer = p; 613 V_pfi_buffer_max = new_max; 614 } 615 if (af == AF_INET && net > 32) 616 net = 128; 617 p = V_pfi_buffer + V_pfi_buffer_cnt++; 618 bzero(p, sizeof(*p)); 619 p->pfra_af = af; 620 p->pfra_net = net; 621 if (af == AF_INET) 622 p->pfra_ip4addr = ((struct sockaddr_in *)sa)->sin_addr; 623 else if (af == AF_INET6) { 624 p->pfra_ip6addr = ((struct sockaddr_in6 *)sa)->sin6_addr; 625 if (IN6_IS_SCOPE_EMBED(&p->pfra_ip6addr)) 626 p->pfra_ip6addr.s6_addr16[1] = 0; 627 } 628 /* mask network address bits */ 629 if (net < 128) 630 ((caddr_t)p)[p->pfra_net/8] &= ~(0xFF >> (p->pfra_net%8)); 631 for (i = (p->pfra_net+7)/8; i < sizeof(p->pfra_u); i++) 632 ((caddr_t)p)[i] = 0; 633} 634 635void 636pfi_dynaddr_remove(struct pfi_dynaddr *dyn) 637{ 638 639 KASSERT(dyn->pfid_kif != NULL, ("%s: null pfid_kif", __func__)); 640 KASSERT(dyn->pfid_kt != NULL, ("%s: null pfid_kt", __func__)); 641 642 TAILQ_REMOVE(&dyn->pfid_kif->pfik_dynaddrs, dyn, entry); 643 pfi_kif_unref(dyn->pfid_kif); 644 pfr_detach_table(dyn->pfid_kt); 645 free(dyn, PFI_MTYPE); 646} 647 648void 649pfi_dynaddr_copyout(struct pf_addr_wrap *aw) 650{ 651 652 KASSERT(aw->type == PF_ADDR_DYNIFTL, 653 ("%s: type %u", __func__, aw->type)); 654 655 if (aw->p.dyn == NULL || aw->p.dyn->pfid_kif == NULL) 656 return; 657 aw->p.dyncnt = aw->p.dyn->pfid_acnt4 + aw->p.dyn->pfid_acnt6; 658} 659 660static int 661pfi_if_compare(struct pfi_kif *p, struct pfi_kif *q) 662{ 663 return (strncmp(p->pfik_name, q->pfik_name, IFNAMSIZ)); 664} 665 666void 667pfi_update_status(const char *name, struct pf_status *pfs) 668{ 669 struct pfi_kif *p; 670 struct pfi_kif_cmp key; 671 struct ifg_member p_member, *ifgm; 672 TAILQ_HEAD(, ifg_member) ifg_members; 673 int i, j, k; 674 675 strlcpy(key.pfik_name, name, sizeof(key.pfik_name)); 676 p = RB_FIND(pfi_ifhead, &V_pfi_ifs, (struct pfi_kif *)&key); 677 if (p == NULL) 678 return; 679 680 if (p->pfik_group != NULL) { 681 bcopy(&p->pfik_group->ifg_members, &ifg_members, 682 sizeof(ifg_members)); 683 } else { 684 /* build a temporary list for p only */ 685 bzero(&p_member, sizeof(p_member)); 686 p_member.ifgm_ifp = p->pfik_ifp; 687 TAILQ_INIT(&ifg_members); 688 TAILQ_INSERT_TAIL(&ifg_members, &p_member, ifgm_next); 689 } 690 if (pfs) { 691 bzero(pfs->pcounters, sizeof(pfs->pcounters)); 692 bzero(pfs->bcounters, sizeof(pfs->bcounters)); 693 } 694 TAILQ_FOREACH(ifgm, &ifg_members, ifgm_next) { 695 if (ifgm->ifgm_ifp == NULL || ifgm->ifgm_ifp->if_pf_kif == NULL) 696 continue; 697 p = (struct pfi_kif *)ifgm->ifgm_ifp->if_pf_kif; 698 699 /* just clear statistics */ 700 if (pfs == NULL) { 701 bzero(p->pfik_packets, sizeof(p->pfik_packets)); 702 bzero(p->pfik_bytes, sizeof(p->pfik_bytes)); 703 p->pfik_tzero = time_second; 704 continue; 705 } 706 for (i = 0; i < 2; i++) 707 for (j = 0; j < 2; j++) 708 for (k = 0; k < 2; k++) { 709 pfs->pcounters[i][j][k] += 710 p->pfik_packets[i][j][k]; 711 pfs->bcounters[i][j] += 712 p->pfik_bytes[i][j][k]; 713 } 714 } 715} 716 717void 718pfi_get_ifaces(const char *name, struct pfi_kif *buf, int *size) 719{ 720 struct pfi_kif *p, *nextp; 721 int n = 0; 722 723 for (p = RB_MIN(pfi_ifhead, &V_pfi_ifs); p; p = nextp) { 724 nextp = RB_NEXT(pfi_ifhead, &V_pfi_ifs, p); 725 if (pfi_skip_if(name, p)) 726 continue; 727 if (*size <= n++) 728 break; 729 if (!p->pfik_tzero) 730 p->pfik_tzero = time_second; 731 bcopy(p, buf++, sizeof(*buf)); 732 nextp = RB_NEXT(pfi_ifhead, &V_pfi_ifs, p); 733 } 734 *size = n; 735} 736 737static int 738pfi_skip_if(const char *filter, struct pfi_kif *p) 739{ 740 struct ifg_list *i; 741 int n; 742 743 if (filter == NULL || !*filter) 744 return (0); 745 if (!strcmp(p->pfik_name, filter)) 746 return (0); /* exact match */ 747 n = strlen(filter); 748 if (n < 1 || n >= IFNAMSIZ) 749 return (1); /* sanity check */ 750 if (filter[n-1] >= '0' && filter[n-1] <= '9') 751 return (1); /* group names may not end in a digit */ 752 if (p->pfik_ifp != NULL) { 753 IF_ADDR_RLOCK(p->pfik_ifp); 754 TAILQ_FOREACH(i, &p->pfik_ifp->if_groups, ifgl_next) { 755 if (!strncmp(i->ifgl_group->ifg_group, filter, 756 IFNAMSIZ)) { 757 IF_ADDR_RUNLOCK(p->pfik_ifp); 758 return (0); /* iface is in group "filter" */ 759 } 760 } 761 IF_ADDR_RUNLOCK(p->pfik_ifp); 762 } 763 return (1); 764} 765 766int 767pfi_set_flags(const char *name, int flags) 768{ 769 struct pfi_kif *p; 770 771 RB_FOREACH(p, pfi_ifhead, &V_pfi_ifs) { 772 if (pfi_skip_if(name, p)) 773 continue; 774 p->pfik_flags |= flags; 775 } 776 return (0); 777} 778 779int 780pfi_clear_flags(const char *name, int flags) 781{ 782 struct pfi_kif *p; 783 784 RB_FOREACH(p, pfi_ifhead, &V_pfi_ifs) { 785 if (pfi_skip_if(name, p)) 786 continue; 787 p->pfik_flags &= ~flags; 788 } 789 return (0); 790} 791 792/* from pf_print_state.c */ 793static int 794pfi_unmask(void *addr) 795{ 796 struct pf_addr *m = addr; 797 int i = 31, j = 0, b = 0; 798 u_int32_t tmp; 799 800 while (j < 4 && m->addr32[j] == 0xffffffff) { 801 b += 32; 802 j++; 803 } 804 if (j < 4) { 805 tmp = ntohl(m->addr32[j]); 806 for (i = 31; tmp & (1 << i); --i) 807 b++; 808 } 809 return (b); 810} 811 812static void 813pfi_attach_ifnet_event(void *arg __unused, struct ifnet *ifp) 814{ 815 816 CURVNET_SET(ifp->if_vnet); 817 if (V_pf_vnet_active == 0) { 818 /* Avoid teardown race in the least expensive way. */ 819 CURVNET_RESTORE(); 820 return; 821 } 822 pfi_attach_ifnet(ifp); 823#ifdef ALTQ 824 PF_RULES_WLOCK(); 825 pf_altq_ifnet_event(ifp, 0); 826 PF_RULES_WUNLOCK(); 827#endif 828 CURVNET_RESTORE(); 829} 830 831static void 832pfi_detach_ifnet_event(void *arg __unused, struct ifnet *ifp) 833{ 834 struct pfi_kif *kif = (struct pfi_kif *)ifp->if_pf_kif; 835 836 if (pfsync_detach_ifnet_ptr) 837 pfsync_detach_ifnet_ptr(ifp); 838 839 if (kif == NULL) 840 return; 841 842 CURVNET_SET(ifp->if_vnet); 843 if (V_pf_vnet_active == 0) { 844 /* Avoid teardown race in the least expensive way. */ 845 CURVNET_RESTORE(); 846 return; 847 } 848 849 PF_RULES_WLOCK(); 850 V_pfi_update++; 851 pfi_kif_update(kif); 852 853 if (kif->pfik_ifp) 854 if_rele(kif->pfik_ifp); 855 856 kif->pfik_ifp = NULL; 857 ifp->if_pf_kif = NULL; 858#ifdef ALTQ 859 pf_altq_ifnet_event(ifp, 1); 860#endif 861 PF_RULES_WUNLOCK(); 862 CURVNET_RESTORE(); 863} 864 865static void 866pfi_attach_group_event(void *arg , struct ifg_group *ifg) 867{ 868 869 CURVNET_SET((struct vnet *)arg); 870 if (V_pf_vnet_active == 0) { 871 /* Avoid teardown race in the least expensive way. */ 872 CURVNET_RESTORE(); 873 return; 874 } 875 pfi_attach_ifgroup(ifg); 876 CURVNET_RESTORE(); 877} 878 879static void 880pfi_change_group_event(void *arg, char *gname) 881{ 882 struct pfi_kif *kif; 883 884 CURVNET_SET((struct vnet *)arg); 885 if (V_pf_vnet_active == 0) { 886 /* Avoid teardown race in the least expensive way. */ 887 CURVNET_RESTORE(); 888 return; 889 } 890 891 kif = malloc(sizeof(*kif), PFI_MTYPE, M_WAITOK); 892 PF_RULES_WLOCK(); 893 V_pfi_update++; 894 kif = pfi_kif_attach(kif, gname); 895 pfi_kif_update(kif); 896 PF_RULES_WUNLOCK(); 897 CURVNET_RESTORE(); 898} 899 900static void 901pfi_detach_group_event(void *arg, struct ifg_group *ifg) 902{ 903 struct pfi_kif *kif = (struct pfi_kif *)ifg->ifg_pf_kif; 904 905 if (kif == NULL) 906 return; 907 908 CURVNET_SET((struct vnet *)arg); 909 if (V_pf_vnet_active == 0) { 910 /* Avoid teardown race in the least expensive way. */ 911 CURVNET_RESTORE(); 912 return; 913 } 914 PF_RULES_WLOCK(); 915 V_pfi_update++; 916 917 kif->pfik_group = NULL; 918 ifg->ifg_pf_kif = NULL; 919 PF_RULES_WUNLOCK(); 920 CURVNET_RESTORE(); 921} 922 923static void 924pfi_ifaddr_event(void *arg __unused, struct ifnet *ifp) 925{ 926 if (ifp->if_pf_kif == NULL) 927 return; 928 929 CURVNET_SET(ifp->if_vnet); 930 if (V_pf_vnet_active == 0) { 931 /* Avoid teardown race in the least expensive way. */ 932 CURVNET_RESTORE(); 933 return; 934 } 935 PF_RULES_WLOCK(); 936 if (ifp && ifp->if_pf_kif) { 937 V_pfi_update++; 938 pfi_kif_update(ifp->if_pf_kif); 939 } 940 PF_RULES_WUNLOCK(); 941 CURVNET_RESTORE(); 942} 943