Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
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sys/netpfil/pf/pf_if.c
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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: releng/11.0/sys/netpfil/pf/pf_if.c 302156 2016-06-23 21:34:38Z bz $"); 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/rwlock.h> 48 #include <sys/socket.h> 49 50 #include <net/if.h> 51 #include <net/if_var.h> 52 #include <net/vnet.h> 53 #include <net/pfvar.h> 54 #include <net/route.h> 55 56 VNET_DEFINE(struct pfi_kif *, pfi_all); 57 static VNET_DEFINE(long, pfi_update); 58 #define V_pfi_update VNET(pfi_update) 59 #define PFI_BUFFER_MAX 0x10000 60 61 VNET_DECLARE(int, pf_vnet_active); 62 #define V_pf_vnet_active VNET(pf_vnet_active) 63 64 static VNET_DEFINE(struct pfr_addr *, pfi_buffer); 65 static VNET_DEFINE(int, pfi_buffer_cnt); 66 static VNET_DEFINE(int, pfi_buffer_max); 67 #define V_pfi_buffer VNET(pfi_buffer) 68 #define V_pfi_buffer_cnt VNET(pfi_buffer_cnt) 69 #define V_pfi_buffer_max VNET(pfi_buffer_max) 70 71 eventhandler_tag pfi_attach_cookie; 72 eventhandler_tag pfi_detach_cookie; 73 eventhandler_tag pfi_attach_group_cookie; 74 eventhandler_tag pfi_change_group_cookie; 75 eventhandler_tag pfi_detach_group_cookie; 76 eventhandler_tag pfi_ifaddr_event_cookie; 77 78 static void pfi_attach_ifnet(struct ifnet *); 79 static void pfi_attach_ifgroup(struct ifg_group *); 80 81 static void pfi_kif_update(struct pfi_kif *); 82 static void pfi_dynaddr_update(struct pfi_dynaddr *dyn); 83 static void pfi_table_update(struct pfr_ktable *, struct pfi_kif *, int, 84 int); 85 static void pfi_instance_add(struct ifnet *, int, int); 86 static void pfi_address_add(struct sockaddr *, int, int); 87 static int pfi_if_compare(struct pfi_kif *, struct pfi_kif *); 88 static int pfi_skip_if(const char *, struct pfi_kif *); 89 static int pfi_unmask(void *); 90 static void pfi_attach_ifnet_event(void * __unused, struct ifnet *); 91 static void pfi_detach_ifnet_event(void * __unused, struct ifnet *); 92 static void pfi_attach_group_event(void *, struct ifg_group *); 93 static void pfi_change_group_event(void *, char *); 94 static void pfi_detach_group_event(void *, struct ifg_group *); 95 static void pfi_ifaddr_event(void * __unused, struct ifnet *); 96 97 RB_HEAD(pfi_ifhead, pfi_kif); 98 static RB_PROTOTYPE(pfi_ifhead, pfi_kif, pfik_tree, pfi_if_compare); 99 static RB_GENERATE(pfi_ifhead, pfi_kif, pfik_tree, pfi_if_compare); 100 static VNET_DEFINE(struct pfi_ifhead, pfi_ifs); 101 #define V_pfi_ifs VNET(pfi_ifs) 102 103 #define PFI_BUFFER_MAX 0x10000 104 MALLOC_DEFINE(PFI_MTYPE, "pf_ifnet", "pf(4) interface database"); 105 106 LIST_HEAD(pfi_list, pfi_kif); 107 static VNET_DEFINE(struct pfi_list, pfi_unlinked_kifs); 108 #define V_pfi_unlinked_kifs VNET(pfi_unlinked_kifs) 109 static struct mtx pfi_unlnkdkifs_mtx; 110 MTX_SYSINIT(pfi_unlnkdkifs_mtx, &pfi_unlnkdkifs_mtx, "pf unlinked interfaces", 111 MTX_DEF); 112 113 void 114 pfi_initialize_vnet(void) 115 { 116 struct ifg_group *ifg; 117 struct ifnet *ifp; 118 struct pfi_kif *kif; 119 120 V_pfi_buffer_max = 64; 121 V_pfi_buffer = malloc(V_pfi_buffer_max * sizeof(*V_pfi_buffer), 122 PFI_MTYPE, M_WAITOK); 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 } 136 137 void 138 pfi_initialize(void) 139 { 140 141 pfi_attach_cookie = EVENTHANDLER_REGISTER(ifnet_arrival_event, 142 pfi_attach_ifnet_event, NULL, EVENTHANDLER_PRI_ANY); 143 pfi_detach_cookie = EVENTHANDLER_REGISTER(ifnet_departure_event, 144 pfi_detach_ifnet_event, NULL, EVENTHANDLER_PRI_ANY); 145 pfi_attach_group_cookie = EVENTHANDLER_REGISTER(group_attach_event, 146 pfi_attach_group_event, curvnet, EVENTHANDLER_PRI_ANY); 147 pfi_change_group_cookie = EVENTHANDLER_REGISTER(group_change_event, 148 pfi_change_group_event, curvnet, EVENTHANDLER_PRI_ANY); 149 pfi_detach_group_cookie = EVENTHANDLER_REGISTER(group_detach_event, 150 pfi_detach_group_event, curvnet, EVENTHANDLER_PRI_ANY); 151 pfi_ifaddr_event_cookie = EVENTHANDLER_REGISTER(ifaddr_event, 152 pfi_ifaddr_event, NULL, EVENTHANDLER_PRI_ANY); 153 } 154 155 void 156 pfi_cleanup_vnet(void) 157 { 158 struct pfi_kif *kif; 159 160 PF_RULES_WASSERT(); 161 162 V_pfi_all = NULL; 163 while ((kif = RB_MIN(pfi_ifhead, &V_pfi_ifs))) { 164 RB_REMOVE(pfi_ifhead, &V_pfi_ifs, kif); 165 if (kif->pfik_group) 166 kif->pfik_group->ifg_pf_kif = NULL; 167 if (kif->pfik_ifp) 168 kif->pfik_ifp->if_pf_kif = NULL; 169 free(kif, PFI_MTYPE); 170 } 171 172 mtx_lock(&pfi_unlnkdkifs_mtx); 173 while ((kif = LIST_FIRST(&V_pfi_unlinked_kifs))) { 174 LIST_REMOVE(kif, pfik_list); 175 free(kif, PFI_MTYPE); 176 } 177 mtx_unlock(&pfi_unlnkdkifs_mtx); 178 179 free(V_pfi_buffer, PFI_MTYPE); 180 } 181 182 void 183 pfi_cleanup(void) 184 { 185 186 EVENTHANDLER_DEREGISTER(ifnet_arrival_event, pfi_attach_cookie); 187 EVENTHANDLER_DEREGISTER(ifnet_departure_event, pfi_detach_cookie); 188 EVENTHANDLER_DEREGISTER(group_attach_event, pfi_attach_group_cookie); 189 EVENTHANDLER_DEREGISTER(group_change_event, pfi_change_group_cookie); 190 EVENTHANDLER_DEREGISTER(group_detach_event, pfi_detach_group_cookie); 191 EVENTHANDLER_DEREGISTER(ifaddr_event, pfi_ifaddr_event_cookie); 192 } 193 194 struct pfi_kif * 195 pfi_kif_find(const char *kif_name) 196 { 197 struct pfi_kif_cmp s; 198 199 PF_RULES_ASSERT(); 200 201 bzero(&s, sizeof(s)); 202 strlcpy(s.pfik_name, kif_name, sizeof(s.pfik_name)); 203 204 return (RB_FIND(pfi_ifhead, &V_pfi_ifs, (struct pfi_kif *)&s)); 205 } 206 207 struct pfi_kif * 208 pfi_kif_attach(struct pfi_kif *kif, const char *kif_name) 209 { 210 struct pfi_kif *kif1; 211 212 PF_RULES_WASSERT(); 213 KASSERT(kif != NULL, ("%s: null kif", __func__)); 214 215 kif1 = pfi_kif_find(kif_name); 216 if (kif1 != NULL) { 217 free(kif, PFI_MTYPE); 218 return (kif1); 219 } 220 221 bzero(kif, sizeof(*kif)); 222 strlcpy(kif->pfik_name, kif_name, sizeof(kif->pfik_name)); 223 /* 224 * It seems that the value of time_second is in unintialzied state 225 * when pf sets interface statistics clear time in boot phase if pf 226 * was statically linked to kernel. Instead of setting the bogus 227 * time value have pfi_get_ifaces handle this case. In 228 * pfi_get_ifaces it uses time_second if it sees the time is 0. 229 */ 230 kif->pfik_tzero = time_second > 1 ? time_second : 0; 231 TAILQ_INIT(&kif->pfik_dynaddrs); 232 233 RB_INSERT(pfi_ifhead, &V_pfi_ifs, kif); 234 235 return (kif); 236 } 237 238 void 239 pfi_kif_ref(struct pfi_kif *kif) 240 { 241 242 PF_RULES_WASSERT(); 243 kif->pfik_rulerefs++; 244 } 245 246 void 247 pfi_kif_unref(struct pfi_kif *kif) 248 { 249 250 PF_RULES_WASSERT(); 251 KASSERT(kif->pfik_rulerefs > 0, ("%s: %p has zero refs", __func__, kif)); 252 253 kif->pfik_rulerefs--; 254 255 if (kif->pfik_rulerefs > 0) 256 return; 257 258 /* kif referencing an existing ifnet or group should exist. */ 259 if (kif->pfik_ifp != NULL || kif->pfik_group != NULL || kif == V_pfi_all) 260 return; 261 262 RB_REMOVE(pfi_ifhead, &V_pfi_ifs, kif); 263 264 kif->pfik_flags |= PFI_IFLAG_REFS; 265 266 mtx_lock(&pfi_unlnkdkifs_mtx); 267 LIST_INSERT_HEAD(&V_pfi_unlinked_kifs, kif, pfik_list); 268 mtx_unlock(&pfi_unlnkdkifs_mtx); 269 } 270 271 void 272 pfi_kif_purge(void) 273 { 274 struct pfi_kif *kif, *kif1; 275 276 /* 277 * Do naive mark-and-sweep garbage collecting of old kifs. 278 * Reference flag is raised by pf_purge_expired_states(). 279 */ 280 mtx_lock(&pfi_unlnkdkifs_mtx); 281 LIST_FOREACH_SAFE(kif, &V_pfi_unlinked_kifs, pfik_list, kif1) { 282 if (!(kif->pfik_flags & PFI_IFLAG_REFS)) { 283 LIST_REMOVE(kif, pfik_list); 284 free(kif, PFI_MTYPE); 285 } else 286 kif->pfik_flags &= ~PFI_IFLAG_REFS; 287 } 288 mtx_unlock(&pfi_unlnkdkifs_mtx); 289 } 290 291 int 292 pfi_kif_match(struct pfi_kif *rule_kif, struct pfi_kif *packet_kif) 293 { 294 struct ifg_list *p; 295 296 if (rule_kif == NULL || rule_kif == packet_kif) 297 return (1); 298 299 if (rule_kif->pfik_group != NULL) 300 /* XXXGL: locking? */ 301 TAILQ_FOREACH(p, &packet_kif->pfik_ifp->if_groups, ifgl_next) 302 if (p->ifgl_group == rule_kif->pfik_group) 303 return (1); 304 305 return (0); 306 } 307 308 static void 309 pfi_attach_ifnet(struct ifnet *ifp) 310 { 311 struct pfi_kif *kif; 312 313 kif = malloc(sizeof(*kif), PFI_MTYPE, M_WAITOK); 314 315 PF_RULES_WLOCK(); 316 V_pfi_update++; 317 kif = pfi_kif_attach(kif, ifp->if_xname); 318 319 kif->pfik_ifp = ifp; 320 ifp->if_pf_kif = kif; 321 322 pfi_kif_update(kif); 323 PF_RULES_WUNLOCK(); 324 } 325 326 static void 327 pfi_attach_ifgroup(struct ifg_group *ifg) 328 { 329 struct pfi_kif *kif; 330 331 kif = malloc(sizeof(*kif), PFI_MTYPE, M_WAITOK); 332 333 PF_RULES_WLOCK(); 334 V_pfi_update++; 335 kif = pfi_kif_attach(kif, ifg->ifg_group); 336 337 kif->pfik_group = ifg; 338 ifg->ifg_pf_kif = kif; 339 PF_RULES_WUNLOCK(); 340 } 341 342 int 343 pfi_match_addr(struct pfi_dynaddr *dyn, struct pf_addr *a, sa_family_t af) 344 { 345 switch (af) { 346 #ifdef INET 347 case AF_INET: 348 switch (dyn->pfid_acnt4) { 349 case 0: 350 return (0); 351 case 1: 352 return (PF_MATCHA(0, &dyn->pfid_addr4, 353 &dyn->pfid_mask4, a, AF_INET)); 354 default: 355 return (pfr_match_addr(dyn->pfid_kt, a, AF_INET)); 356 } 357 break; 358 #endif /* INET */ 359 #ifdef INET6 360 case AF_INET6: 361 switch (dyn->pfid_acnt6) { 362 case 0: 363 return (0); 364 case 1: 365 return (PF_MATCHA(0, &dyn->pfid_addr6, 366 &dyn->pfid_mask6, a, AF_INET6)); 367 default: 368 return (pfr_match_addr(dyn->pfid_kt, a, AF_INET6)); 369 } 370 break; 371 #endif /* INET6 */ 372 default: 373 return (0); 374 } 375 } 376 377 int 378 pfi_dynaddr_setup(struct pf_addr_wrap *aw, sa_family_t af) 379 { 380 struct pfi_dynaddr *dyn; 381 char tblname[PF_TABLE_NAME_SIZE]; 382 struct pf_ruleset *ruleset = NULL; 383 struct pfi_kif *kif; 384 int rv = 0; 385 386 PF_RULES_WASSERT(); 387 KASSERT(aw->type == PF_ADDR_DYNIFTL, ("%s: type %u", 388 __func__, aw->type)); 389 KASSERT(aw->p.dyn == NULL, ("%s: dyn is %p", __func__, aw->p.dyn)); 390 391 if ((dyn = malloc(sizeof(*dyn), PFI_MTYPE, M_NOWAIT | M_ZERO)) == NULL) 392 return (ENOMEM); 393 394 if ((kif = malloc(sizeof(*kif), PFI_MTYPE, M_NOWAIT)) == NULL) { 395 free(dyn, PFI_MTYPE); 396 return (ENOMEM); 397 } 398 399 if (!strcmp(aw->v.ifname, "self")) 400 dyn->pfid_kif = pfi_kif_attach(kif, IFG_ALL); 401 else 402 dyn->pfid_kif = pfi_kif_attach(kif, aw->v.ifname); 403 pfi_kif_ref(dyn->pfid_kif); 404 405 dyn->pfid_net = pfi_unmask(&aw->v.a.mask); 406 if (af == AF_INET && dyn->pfid_net == 32) 407 dyn->pfid_net = 128; 408 strlcpy(tblname, aw->v.ifname, sizeof(tblname)); 409 if (aw->iflags & PFI_AFLAG_NETWORK) 410 strlcat(tblname, ":network", sizeof(tblname)); 411 if (aw->iflags & PFI_AFLAG_BROADCAST) 412 strlcat(tblname, ":broadcast", sizeof(tblname)); 413 if (aw->iflags & PFI_AFLAG_PEER) 414 strlcat(tblname, ":peer", sizeof(tblname)); 415 if (aw->iflags & PFI_AFLAG_NOALIAS) 416 strlcat(tblname, ":0", sizeof(tblname)); 417 if (dyn->pfid_net != 128) 418 snprintf(tblname + strlen(tblname), 419 sizeof(tblname) - strlen(tblname), "/%d", dyn->pfid_net); 420 if ((ruleset = pf_find_or_create_ruleset(PF_RESERVED_ANCHOR)) == NULL) { 421 rv = ENOMEM; 422 goto _bad; 423 } 424 425 if ((dyn->pfid_kt = pfr_attach_table(ruleset, tblname)) == NULL) { 426 rv = ENOMEM; 427 goto _bad; 428 } 429 430 dyn->pfid_kt->pfrkt_flags |= PFR_TFLAG_ACTIVE; 431 dyn->pfid_iflags = aw->iflags; 432 dyn->pfid_af = af; 433 434 TAILQ_INSERT_TAIL(&dyn->pfid_kif->pfik_dynaddrs, dyn, entry); 435 aw->p.dyn = dyn; 436 pfi_kif_update(dyn->pfid_kif); 437 438 return (0); 439 440 _bad: 441 if (dyn->pfid_kt != NULL) 442 pfr_detach_table(dyn->pfid_kt); 443 if (ruleset != NULL) 444 pf_remove_if_empty_ruleset(ruleset); 445 if (dyn->pfid_kif != NULL) 446 pfi_kif_unref(dyn->pfid_kif); 447 free(dyn, PFI_MTYPE); 448 449 return (rv); 450 } 451 452 static void 453 pfi_kif_update(struct pfi_kif *kif) 454 { 455 struct ifg_list *ifgl; 456 struct pfi_dynaddr *p; 457 458 PF_RULES_WASSERT(); 459 460 /* update all dynaddr */ 461 TAILQ_FOREACH(p, &kif->pfik_dynaddrs, entry) 462 pfi_dynaddr_update(p); 463 464 /* again for all groups kif is member of */ 465 if (kif->pfik_ifp != NULL) { 466 IF_ADDR_RLOCK(kif->pfik_ifp); 467 TAILQ_FOREACH(ifgl, &kif->pfik_ifp->if_groups, ifgl_next) 468 pfi_kif_update((struct pfi_kif *) 469 ifgl->ifgl_group->ifg_pf_kif); 470 IF_ADDR_RUNLOCK(kif->pfik_ifp); 471 } 472 } 473 474 static void 475 pfi_dynaddr_update(struct pfi_dynaddr *dyn) 476 { 477 struct pfi_kif *kif; 478 struct pfr_ktable *kt; 479 480 PF_RULES_WASSERT(); 481 KASSERT(dyn && dyn->pfid_kif && dyn->pfid_kt, 482 ("%s: bad argument", __func__)); 483 484 kif = dyn->pfid_kif; 485 kt = dyn->pfid_kt; 486 487 if (kt->pfrkt_larg != V_pfi_update) { 488 /* this table needs to be brought up-to-date */ 489 pfi_table_update(kt, kif, dyn->pfid_net, dyn->pfid_iflags); 490 kt->pfrkt_larg = V_pfi_update; 491 } 492 pfr_dynaddr_update(kt, dyn); 493 } 494 495 static void 496 pfi_table_update(struct pfr_ktable *kt, struct pfi_kif *kif, int net, int flags) 497 { 498 int e, size2 = 0; 499 struct ifg_member *ifgm; 500 501 V_pfi_buffer_cnt = 0; 502 503 if (kif->pfik_ifp != NULL) 504 pfi_instance_add(kif->pfik_ifp, net, flags); 505 else if (kif->pfik_group != NULL) { 506 IFNET_RLOCK_NOSLEEP(); 507 TAILQ_FOREACH(ifgm, &kif->pfik_group->ifg_members, ifgm_next) 508 pfi_instance_add(ifgm->ifgm_ifp, net, flags); 509 IFNET_RUNLOCK_NOSLEEP(); 510 } 511 512 if ((e = pfr_set_addrs(&kt->pfrkt_t, V_pfi_buffer, V_pfi_buffer_cnt, &size2, 513 NULL, NULL, NULL, 0, PFR_TFLAG_ALLMASK))) 514 printf("%s: cannot set %d new addresses into table %s: %d\n", 515 __func__, V_pfi_buffer_cnt, kt->pfrkt_name, e); 516 } 517 518 static void 519 pfi_instance_add(struct ifnet *ifp, int net, int flags) 520 { 521 struct ifaddr *ia; 522 int got4 = 0, got6 = 0; 523 int net2, af; 524 525 IF_ADDR_RLOCK(ifp); 526 TAILQ_FOREACH(ia, &ifp->if_addrhead, ifa_list) { 527 if (ia->ifa_addr == NULL) 528 continue; 529 af = ia->ifa_addr->sa_family; 530 if (af != AF_INET && af != AF_INET6) 531 continue; 532 /* 533 * XXX: For point-to-point interfaces, (ifname:0) and IPv4, 534 * jump over addresses without a proper route to work 535 * around a problem with ppp not fully removing the 536 * address used during IPCP. 537 */ 538 if ((ifp->if_flags & IFF_POINTOPOINT) && 539 !(ia->ifa_flags & IFA_ROUTE) && 540 (flags & PFI_AFLAG_NOALIAS) && (af == AF_INET)) 541 continue; 542 if ((flags & PFI_AFLAG_BROADCAST) && af == AF_INET6) 543 continue; 544 if ((flags & PFI_AFLAG_BROADCAST) && 545 !(ifp->if_flags & IFF_BROADCAST)) 546 continue; 547 if ((flags & PFI_AFLAG_PEER) && 548 !(ifp->if_flags & IFF_POINTOPOINT)) 549 continue; 550 if ((flags & PFI_AFLAG_NETWORK) && af == AF_INET6 && 551 IN6_IS_ADDR_LINKLOCAL( 552 &((struct sockaddr_in6 *)ia->ifa_addr)->sin6_addr)) 553 continue; 554 if (flags & PFI_AFLAG_NOALIAS) { 555 if (af == AF_INET && got4) 556 continue; 557 if (af == AF_INET6 && got6) 558 continue; 559 } 560 if (af == AF_INET) 561 got4 = 1; 562 else if (af == AF_INET6) 563 got6 = 1; 564 net2 = net; 565 if (net2 == 128 && (flags & PFI_AFLAG_NETWORK)) { 566 if (af == AF_INET) 567 net2 = pfi_unmask(&((struct sockaddr_in *) 568 ia->ifa_netmask)->sin_addr); 569 else if (af == AF_INET6) 570 net2 = pfi_unmask(&((struct sockaddr_in6 *) 571 ia->ifa_netmask)->sin6_addr); 572 } 573 if (af == AF_INET && net2 > 32) 574 net2 = 32; 575 if (flags & PFI_AFLAG_BROADCAST) 576 pfi_address_add(ia->ifa_broadaddr, af, net2); 577 else if (flags & PFI_AFLAG_PEER) 578 pfi_address_add(ia->ifa_dstaddr, af, net2); 579 else 580 pfi_address_add(ia->ifa_addr, af, net2); 581 } 582 IF_ADDR_RUNLOCK(ifp); 583 } 584 585 static void 586 pfi_address_add(struct sockaddr *sa, int af, int net) 587 { 588 struct pfr_addr *p; 589 int i; 590 591 if (V_pfi_buffer_cnt >= V_pfi_buffer_max) { 592 int new_max = V_pfi_buffer_max * 2; 593 594 if (new_max > PFI_BUFFER_MAX) { 595 printf("%s: address buffer full (%d/%d)\n", __func__, 596 V_pfi_buffer_cnt, PFI_BUFFER_MAX); 597 return; 598 } 599 p = malloc(new_max * sizeof(*V_pfi_buffer), PFI_MTYPE, 600 M_NOWAIT); 601 if (p == NULL) { 602 printf("%s: no memory to grow buffer (%d/%d)\n", 603 __func__, V_pfi_buffer_cnt, PFI_BUFFER_MAX); 604 return; 605 } 606 memcpy(p, V_pfi_buffer, V_pfi_buffer_max * sizeof(*V_pfi_buffer)); 607 /* no need to zero buffer */ 608 free(V_pfi_buffer, PFI_MTYPE); 609 V_pfi_buffer = p; 610 V_pfi_buffer_max = new_max; 611 } 612 if (af == AF_INET && net > 32) 613 net = 128; 614 p = V_pfi_buffer + V_pfi_buffer_cnt++; 615 bzero(p, sizeof(*p)); 616 p->pfra_af = af; 617 p->pfra_net = net; 618 if (af == AF_INET) 619 p->pfra_ip4addr = ((struct sockaddr_in *)sa)->sin_addr; 620 else if (af == AF_INET6) { 621 p->pfra_ip6addr = ((struct sockaddr_in6 *)sa)->sin6_addr; 622 if (IN6_IS_SCOPE_EMBED(&p->pfra_ip6addr)) 623 p->pfra_ip6addr.s6_addr16[1] = 0; 624 } 625 /* mask network address bits */ 626 if (net < 128) 627 ((caddr_t)p)[p->pfra_net/8] &= ~(0xFF >> (p->pfra_net%8)); 628 for (i = (p->pfra_net+7)/8; i < sizeof(p->pfra_u); i++) 629 ((caddr_t)p)[i] = 0; 630 } 631 632 void 633 pfi_dynaddr_remove(struct pfi_dynaddr *dyn) 634 { 635 636 KASSERT(dyn->pfid_kif != NULL, ("%s: null pfid_kif", __func__)); 637 KASSERT(dyn->pfid_kt != NULL, ("%s: null pfid_kt", __func__)); 638 639 TAILQ_REMOVE(&dyn->pfid_kif->pfik_dynaddrs, dyn, entry); 640 pfi_kif_unref(dyn->pfid_kif); 641 pfr_detach_table(dyn->pfid_kt); 642 free(dyn, PFI_MTYPE); 643 } 644 645 void 646 pfi_dynaddr_copyout(struct pf_addr_wrap *aw) 647 { 648 649 KASSERT(aw->type == PF_ADDR_DYNIFTL, 650 ("%s: type %u", __func__, aw->type)); 651 652 if (aw->p.dyn == NULL || aw->p.dyn->pfid_kif == NULL) 653 return; 654 aw->p.dyncnt = aw->p.dyn->pfid_acnt4 + aw->p.dyn->pfid_acnt6; 655 } 656 657 static int 658 pfi_if_compare(struct pfi_kif *p, struct pfi_kif *q) 659 { 660 return (strncmp(p->pfik_name, q->pfik_name, IFNAMSIZ)); 661 } 662 663 void 664 pfi_update_status(const char *name, struct pf_status *pfs) 665 { 666 struct pfi_kif *p; 667 struct pfi_kif_cmp key; 668 struct ifg_member p_member, *ifgm; 669 TAILQ_HEAD(, ifg_member) ifg_members; 670 int i, j, k; 671 672 strlcpy(key.pfik_name, name, sizeof(key.pfik_name)); 673 p = RB_FIND(pfi_ifhead, &V_pfi_ifs, (struct pfi_kif *)&key); 674 if (p == NULL) 675 return; 676 677 if (p->pfik_group != NULL) { 678 bcopy(&p->pfik_group->ifg_members, &ifg_members, 679 sizeof(ifg_members)); 680 } else { 681 /* build a temporary list for p only */ 682 bzero(&p_member, sizeof(p_member)); 683 p_member.ifgm_ifp = p->pfik_ifp; 684 TAILQ_INIT(&ifg_members); 685 TAILQ_INSERT_TAIL(&ifg_members, &p_member, ifgm_next); 686 } 687 if (pfs) { 688 bzero(pfs->pcounters, sizeof(pfs->pcounters)); 689 bzero(pfs->bcounters, sizeof(pfs->bcounters)); 690 } 691 TAILQ_FOREACH(ifgm, &ifg_members, ifgm_next) { 692 if (ifgm->ifgm_ifp == NULL || ifgm->ifgm_ifp->if_pf_kif == NULL) 693 continue; 694 p = (struct pfi_kif *)ifgm->ifgm_ifp->if_pf_kif; 695 696 /* just clear statistics */ 697 if (pfs == NULL) { 698 bzero(p->pfik_packets, sizeof(p->pfik_packets)); 699 bzero(p->pfik_bytes, sizeof(p->pfik_bytes)); 700 p->pfik_tzero = time_second; 701 continue; 702 } 703 for (i = 0; i < 2; i++) 704 for (j = 0; j < 2; j++) 705 for (k = 0; k < 2; k++) { 706 pfs->pcounters[i][j][k] += 707 p->pfik_packets[i][j][k]; 708 pfs->bcounters[i][j] += 709 p->pfik_bytes[i][j][k]; 710 } 711 } 712 } 713 714 void 715 pfi_get_ifaces(const char *name, struct pfi_kif *buf, int *size) 716 { 717 struct pfi_kif *p, *nextp; 718 int n = 0; 719 720 for (p = RB_MIN(pfi_ifhead, &V_pfi_ifs); p; p = nextp) { 721 nextp = RB_NEXT(pfi_ifhead, &V_pfi_ifs, p); 722 if (pfi_skip_if(name, p)) 723 continue; 724 if (*size <= n++) 725 break; 726 if (!p->pfik_tzero) 727 p->pfik_tzero = time_second; 728 bcopy(p, buf++, sizeof(*buf)); 729 nextp = RB_NEXT(pfi_ifhead, &V_pfi_ifs, p); 730 } 731 *size = n; 732 } 733 734 static int 735 pfi_skip_if(const char *filter, struct pfi_kif *p) 736 { 737 int n; 738 739 if (filter == NULL || !*filter) 740 return (0); 741 if (!strcmp(p->pfik_name, filter)) 742 return (0); /* exact match */ 743 n = strlen(filter); 744 if (n < 1 || n >= IFNAMSIZ) 745 return (1); /* sanity check */ 746 if (filter[n-1] >= '' && filter[n-1] <= '9') 747 return (1); /* only do exact match in that case */ 748 if (strncmp(p->pfik_name, filter, n)) 749 return (1); /* prefix doesn't match */ 750 return (p->pfik_name[n] < '' || p->pfik_name[n] > '9'); 751 } 752 753 int 754 pfi_set_flags(const char *name, int flags) 755 { 756 struct pfi_kif *p; 757 758 RB_FOREACH(p, pfi_ifhead, &V_pfi_ifs) { 759 if (pfi_skip_if(name, p)) 760 continue; 761 p->pfik_flags |= flags; 762 } 763 return (0); 764 } 765 766 int 767 pfi_clear_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 } 778 779 /* from pf_print_state.c */ 780 static int 781 pfi_unmask(void *addr) 782 { 783 struct pf_addr *m = addr; 784 int i = 31, j = 0, b = 0; 785 u_int32_t tmp; 786 787 while (j < 4 && m->addr32[j] == 0xffffffff) { 788 b += 32; 789 j++; 790 } 791 if (j < 4) { 792 tmp = ntohl(m->addr32[j]); 793 for (i = 31; tmp & (1 << i); --i) 794 b++; 795 } 796 return (b); 797 } 798 799 static void 800 pfi_attach_ifnet_event(void *arg __unused, struct ifnet *ifp) 801 { 802 803 CURVNET_SET(ifp->if_vnet); 804 if (V_pf_vnet_active == 0) { 805 /* Avoid teardown race in the least expensive way. */ 806 CURVNET_RESTORE(); 807 return; 808 } 809 pfi_attach_ifnet(ifp); 810 #ifdef ALTQ 811 PF_RULES_WLOCK(); 812 pf_altq_ifnet_event(ifp, 0); 813 PF_RULES_WUNLOCK(); 814 #endif 815 CURVNET_RESTORE(); 816 } 817 818 static void 819 pfi_detach_ifnet_event(void *arg __unused, struct ifnet *ifp) 820 { 821 struct pfi_kif *kif = (struct pfi_kif *)ifp->if_pf_kif; 822 823 if (kif == NULL) 824 return; 825 826 CURVNET_SET(ifp->if_vnet); 827 if (V_pf_vnet_active == 0) { 828 /* Avoid teardown race in the least expensive way. */ 829 CURVNET_RESTORE(); 830 return; 831 } 832 PF_RULES_WLOCK(); 833 V_pfi_update++; 834 pfi_kif_update(kif); 835 836 kif->pfik_ifp = NULL; 837 ifp->if_pf_kif = NULL; 838 #ifdef ALTQ 839 pf_altq_ifnet_event(ifp, 1); 840 #endif 841 PF_RULES_WUNLOCK(); 842 CURVNET_RESTORE(); 843 } 844 845 static void 846 pfi_attach_group_event(void *arg , struct ifg_group *ifg) 847 { 848 849 CURVNET_SET((struct vnet *)arg); 850 if (V_pf_vnet_active == 0) { 851 /* Avoid teardown race in the least expensive way. */ 852 CURVNET_RESTORE(); 853 return; 854 } 855 pfi_attach_ifgroup(ifg); 856 CURVNET_RESTORE(); 857 } 858 859 static void 860 pfi_change_group_event(void *arg, char *gname) 861 { 862 struct pfi_kif *kif; 863 864 CURVNET_SET((struct vnet *)arg); 865 if (V_pf_vnet_active == 0) { 866 /* Avoid teardown race in the least expensive way. */ 867 CURVNET_RESTORE(); 868 return; 869 } 870 871 kif = malloc(sizeof(*kif), PFI_MTYPE, M_WAITOK); 872 PF_RULES_WLOCK(); 873 V_pfi_update++; 874 kif = pfi_kif_attach(kif, gname); 875 pfi_kif_update(kif); 876 PF_RULES_WUNLOCK(); 877 CURVNET_RESTORE(); 878 } 879 880 static void 881 pfi_detach_group_event(void *arg, struct ifg_group *ifg) 882 { 883 struct pfi_kif *kif = (struct pfi_kif *)ifg->ifg_pf_kif; 884 885 if (kif == NULL) 886 return; 887 888 CURVNET_SET((struct vnet *)arg); 889 if (V_pf_vnet_active == 0) { 890 /* Avoid teardown race in the least expensive way. */ 891 CURVNET_RESTORE(); 892 return; 893 } 894 PF_RULES_WLOCK(); 895 V_pfi_update++; 896 897 kif->pfik_group = NULL; 898 ifg->ifg_pf_kif = NULL; 899 PF_RULES_WUNLOCK(); 900 CURVNET_RESTORE(); 901 } 902 903 static void 904 pfi_ifaddr_event(void *arg __unused, struct ifnet *ifp) 905 { 906 if (ifp->if_pf_kif == NULL) 907 return; 908 909 CURVNET_SET(ifp->if_vnet); 910 if (V_pf_vnet_active == 0) { 911 /* Avoid teardown race in the least expensive way. */ 912 CURVNET_RESTORE(); 913 return; 914 } 915 PF_RULES_WLOCK(); 916 if (ifp && ifp->if_pf_kif) { 917 V_pfi_update++; 918 pfi_kif_update(ifp->if_pf_kif); 919 } 920 PF_RULES_WUNLOCK(); 921 CURVNET_RESTORE(); 922 }
Cache object: 2b731bffbe0f69227c820be30f87d8fb
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