1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause 3 * 4 * Copyright (c) 2001 Daniel Hartmeier 5 * Copyright (c) 2003 Cedric Berger 6 * Copyright (c) 2005 Henning Brauer <henning@openbsd.org> 7 * Copyright (c) 2005 Ryan McBride <mcbride@openbsd.org> 8 * Copyright (c) 2012 Gleb Smirnoff <glebius@FreeBSD.org> 9 * All rights reserved. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 15 * - Redistributions of source code must retain the above copyright 16 * notice, this list of conditions and the following disclaimer. 17 * - Redistributions in binary form must reproduce the above 18 * copyright notice, this list of conditions and the following 19 * disclaimer in the documentation and/or other materials provided 20 * with the distribution. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 23 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 24 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 25 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE 26 * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 27 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 28 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 29 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER 30 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN 32 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 33 * POSSIBILITY OF SUCH DAMAGE. 34 * 35 * $OpenBSD: pf_if.c,v 1.54 2008/06/14 16:55:28 mk Exp $ 36 */ 37 38 #include <sys/cdefs.h> 39 __FBSDID("$FreeBSD$"); 40 41 #include "opt_inet.h" 42 #include "opt_inet6.h" 43 44 #include <sys/param.h> 45 #include <sys/kernel.h> 46 #include <sys/eventhandler.h> 47 #include <sys/lock.h> 48 #include <sys/mbuf.h> 49 #include <sys/socket.h> 50 51 #include <net/if.h> 52 #include <net/if_var.h> 53 #include <net/vnet.h> 54 #include <net/pfvar.h> 55 #include <net/route.h> 56 57 VNET_DEFINE(struct pfi_kkif *, pfi_all); 58 VNET_DEFINE_STATIC(long, pfi_update); 59 #define V_pfi_update VNET(pfi_update) 60 #define PFI_BUFFER_MAX 0x10000 61 62 VNET_DECLARE(int, pf_vnet_active); 63 #define V_pf_vnet_active VNET(pf_vnet_active) 64 65 VNET_DEFINE_STATIC(struct pfr_addr *, pfi_buffer); 66 VNET_DEFINE_STATIC(int, pfi_buffer_cnt); 67 VNET_DEFINE_STATIC(int, pfi_buffer_max); 68 #define V_pfi_buffer VNET(pfi_buffer) 69 #define V_pfi_buffer_cnt VNET(pfi_buffer_cnt) 70 #define V_pfi_buffer_max VNET(pfi_buffer_max) 71 72 eventhandler_tag pfi_attach_cookie; 73 eventhandler_tag pfi_detach_cookie; 74 eventhandler_tag pfi_attach_group_cookie; 75 eventhandler_tag pfi_change_group_cookie; 76 eventhandler_tag pfi_detach_group_cookie; 77 eventhandler_tag pfi_ifaddr_event_cookie; 78 79 static void pfi_attach_ifnet(struct ifnet *, struct pfi_kkif *); 80 static void pfi_attach_ifgroup(struct ifg_group *, struct pfi_kkif *); 81 82 static void pfi_kkif_update(struct pfi_kkif *); 83 static void pfi_dynaddr_update(struct pfi_dynaddr *dyn); 84 static void pfi_table_update(struct pfr_ktable *, struct pfi_kkif *, int, 85 int); 86 static void pfi_instance_add(struct ifnet *, int, int); 87 static void pfi_address_add(struct sockaddr *, int, int); 88 static int pfi_kkif_compare(struct pfi_kkif *, struct pfi_kkif *); 89 static int pfi_skip_if(const char *, struct pfi_kkif *); 90 static int pfi_unmask(void *); 91 static void pfi_attach_ifnet_event(void * __unused, struct ifnet *); 92 static void pfi_detach_ifnet_event(void * __unused, struct ifnet *); 93 static void pfi_attach_group_event(void * __unused, struct ifg_group *); 94 static void pfi_change_group_event(void * __unused, char *); 95 static void pfi_detach_group_event(void * __unused, struct ifg_group *); 96 static void pfi_ifaddr_event(void * __unused, struct ifnet *); 97 98 RB_HEAD(pfi_ifhead, pfi_kkif); 99 static RB_PROTOTYPE(pfi_ifhead, pfi_kkif, pfik_tree, pfi_kkif_compare); 100 static RB_GENERATE(pfi_ifhead, pfi_kkif, pfik_tree, pfi_kkif_compare); 101 VNET_DEFINE_STATIC(struct pfi_ifhead, pfi_ifs); 102 #define V_pfi_ifs VNET(pfi_ifs) 103 104 #define PFI_BUFFER_MAX 0x10000 105 MALLOC_DEFINE(PFI_MTYPE, "pf_ifnet", "pf(4) interface database"); 106 107 LIST_HEAD(pfi_list, pfi_kkif); 108 VNET_DEFINE_STATIC(struct pfi_list, pfi_unlinked_kifs); 109 #define V_pfi_unlinked_kifs VNET(pfi_unlinked_kifs) 110 static struct mtx pfi_unlnkdkifs_mtx; 111 MTX_SYSINIT(pfi_unlnkdkifs_mtx, &pfi_unlnkdkifs_mtx, "pf unlinked interfaces", 112 MTX_DEF); 113 114 void 115 pfi_initialize_vnet(void) 116 { 117 struct pfi_list kifs = LIST_HEAD_INITIALIZER(); 118 struct epoch_tracker et; 119 struct pfi_kkif *kif; 120 struct ifg_group *ifg; 121 struct ifnet *ifp; 122 int nkifs; 123 124 V_pfi_buffer_max = 64; 125 V_pfi_buffer = malloc(V_pfi_buffer_max * sizeof(*V_pfi_buffer), 126 PFI_MTYPE, M_WAITOK); 127 128 nkifs = 1; /* one for V_pfi_all */ 129 IFNET_RLOCK(); 130 CK_STAILQ_FOREACH(ifg, &V_ifg_head, ifg_next) 131 nkifs++; 132 CK_STAILQ_FOREACH(ifp, &V_ifnet, if_link) 133 nkifs++; 134 135 for (int n = 0; n < nkifs; n++) { 136 kif = pf_kkif_create(M_WAITOK); 137 LIST_INSERT_HEAD(&kifs, kif, pfik_list); 138 } 139 140 NET_EPOCH_ENTER(et); 141 PF_RULES_WLOCK(); 142 kif = LIST_FIRST(&kifs); 143 LIST_REMOVE(kif, pfik_list); 144 V_pfi_all = pfi_kkif_attach(kif, IFG_ALL); 145 CK_STAILQ_FOREACH(ifg, &V_ifg_head, ifg_next) { 146 kif = LIST_FIRST(&kifs); 147 LIST_REMOVE(kif, pfik_list); 148 pfi_attach_ifgroup(ifg, kif); 149 } 150 CK_STAILQ_FOREACH(ifp, &V_ifnet, if_link) { 151 kif = LIST_FIRST(&kifs); 152 LIST_REMOVE(kif, pfik_list); 153 pfi_attach_ifnet(ifp, kif); 154 } 155 PF_RULES_WUNLOCK(); 156 NET_EPOCH_EXIT(et); 157 IFNET_RUNLOCK(); 158 159 MPASS(LIST_EMPTY(&kifs)); 160 } 161 162 void 163 pfi_initialize(void) 164 { 165 166 pfi_attach_cookie = EVENTHANDLER_REGISTER(ifnet_arrival_event, 167 pfi_attach_ifnet_event, NULL, EVENTHANDLER_PRI_ANY); 168 pfi_detach_cookie = EVENTHANDLER_REGISTER(ifnet_departure_event, 169 pfi_detach_ifnet_event, NULL, EVENTHANDLER_PRI_ANY); 170 pfi_attach_group_cookie = EVENTHANDLER_REGISTER(group_attach_event, 171 pfi_attach_group_event, NULL, EVENTHANDLER_PRI_ANY); 172 pfi_change_group_cookie = EVENTHANDLER_REGISTER(group_change_event, 173 pfi_change_group_event, NULL, EVENTHANDLER_PRI_ANY); 174 pfi_detach_group_cookie = EVENTHANDLER_REGISTER(group_detach_event, 175 pfi_detach_group_event, NULL, EVENTHANDLER_PRI_ANY); 176 pfi_ifaddr_event_cookie = EVENTHANDLER_REGISTER(ifaddr_event, 177 pfi_ifaddr_event, NULL, EVENTHANDLER_PRI_ANY); 178 } 179 180 void 181 pfi_cleanup_vnet(void) 182 { 183 struct pfi_kkif *kif; 184 185 PF_RULES_WASSERT(); 186 187 V_pfi_all = NULL; 188 while ((kif = RB_MIN(pfi_ifhead, &V_pfi_ifs))) { 189 RB_REMOVE(pfi_ifhead, &V_pfi_ifs, kif); 190 if (kif->pfik_group) 191 kif->pfik_group->ifg_pf_kif = NULL; 192 if (kif->pfik_ifp) { 193 if_rele(kif->pfik_ifp); 194 kif->pfik_ifp->if_pf_kif = NULL; 195 } 196 pf_kkif_free(kif); 197 } 198 199 mtx_lock(&pfi_unlnkdkifs_mtx); 200 while ((kif = LIST_FIRST(&V_pfi_unlinked_kifs))) { 201 LIST_REMOVE(kif, pfik_list); 202 pf_kkif_free(kif); 203 } 204 mtx_unlock(&pfi_unlnkdkifs_mtx); 205 206 free(V_pfi_buffer, PFI_MTYPE); 207 } 208 209 void 210 pfi_cleanup(void) 211 { 212 213 EVENTHANDLER_DEREGISTER(ifnet_arrival_event, pfi_attach_cookie); 214 EVENTHANDLER_DEREGISTER(ifnet_departure_event, pfi_detach_cookie); 215 EVENTHANDLER_DEREGISTER(group_attach_event, pfi_attach_group_cookie); 216 EVENTHANDLER_DEREGISTER(group_change_event, pfi_change_group_cookie); 217 EVENTHANDLER_DEREGISTER(group_detach_event, pfi_detach_group_cookie); 218 EVENTHANDLER_DEREGISTER(ifaddr_event, pfi_ifaddr_event_cookie); 219 } 220 221 struct pfi_kkif* 222 pf_kkif_create(int flags) 223 { 224 struct pfi_kkif *kif; 225 226 kif = malloc(sizeof(*kif), PFI_MTYPE, flags | M_ZERO); 227 if (! kif) 228 return (kif); 229 230 for (int i = 0; i < 2; i++) { 231 for (int j = 0; j < 2; j++) { 232 for (int k = 0; k < 2; k++) { 233 kif->pfik_packets[i][j][k] = 234 counter_u64_alloc(flags); 235 kif->pfik_bytes[i][j][k] = 236 counter_u64_alloc(flags); 237 238 if (! kif->pfik_packets[i][j][k] || 239 ! kif->pfik_bytes[i][j][k]) { 240 pf_kkif_free(kif); 241 return (NULL); 242 } 243 } 244 } 245 } 246 247 return (kif); 248 } 249 250 void 251 pf_kkif_free(struct pfi_kkif *kif) 252 { 253 if (! kif) 254 return; 255 256 for (int i = 0; i < 2; i++) { 257 for (int j = 0; j < 2; j++) { 258 for (int k = 0; k < 2; k++) { 259 counter_u64_free(kif->pfik_packets[i][j][k]); 260 counter_u64_free(kif->pfik_bytes[i][j][k]); 261 } 262 } 263 } 264 265 free(kif, PFI_MTYPE); 266 } 267 268 void 269 pf_kkif_zero(struct pfi_kkif *kif) 270 { 271 272 for (int i = 0; i < 2; i++) { 273 for (int j = 0; j < 2; j++) { 274 for (int k = 0; k < 2; k++) { 275 counter_u64_zero(kif->pfik_packets[i][j][k]); 276 counter_u64_zero(kif->pfik_bytes[i][j][k]); 277 } 278 } 279 } 280 kif->pfik_tzero = time_second; 281 } 282 283 struct pfi_kkif * 284 pfi_kkif_find(const char *kif_name) 285 { 286 struct pfi_kif_cmp s; 287 288 PF_RULES_ASSERT(); 289 290 bzero(&s, sizeof(s)); 291 strlcpy(s.pfik_name, kif_name, sizeof(s.pfik_name)); 292 293 return (RB_FIND(pfi_ifhead, &V_pfi_ifs, (struct pfi_kkif *)&s)); 294 } 295 296 struct pfi_kkif * 297 pfi_kkif_attach(struct pfi_kkif *kif, const char *kif_name) 298 { 299 struct pfi_kkif *kif1; 300 301 PF_RULES_WASSERT(); 302 KASSERT(kif != NULL, ("%s: null kif", __func__)); 303 304 kif1 = pfi_kkif_find(kif_name); 305 if (kif1 != NULL) { 306 pf_kkif_free(kif); 307 return (kif1); 308 } 309 310 pf_kkif_zero(kif); 311 strlcpy(kif->pfik_name, kif_name, sizeof(kif->pfik_name)); 312 /* 313 * It seems that the value of time_second is in unintialzied state 314 * when pf sets interface statistics clear time in boot phase if pf 315 * was statically linked to kernel. Instead of setting the bogus 316 * time value have pfi_get_ifaces handle this case. In 317 * pfi_get_ifaces it uses time_second if it sees the time is 0. 318 */ 319 kif->pfik_tzero = time_second > 1 ? time_second : 0; 320 TAILQ_INIT(&kif->pfik_dynaddrs); 321 322 RB_INSERT(pfi_ifhead, &V_pfi_ifs, kif); 323 324 return (kif); 325 } 326 327 void 328 pfi_kkif_ref(struct pfi_kkif *kif) 329 { 330 331 PF_RULES_WASSERT(); 332 kif->pfik_rulerefs++; 333 } 334 335 void 336 pfi_kkif_unref(struct pfi_kkif *kif) 337 { 338 339 PF_RULES_WASSERT(); 340 KASSERT(kif->pfik_rulerefs > 0, ("%s: %p has zero refs", __func__, kif)); 341 342 kif->pfik_rulerefs--; 343 344 if (kif->pfik_rulerefs > 0) 345 return; 346 347 /* kif referencing an existing ifnet or group or holding flags should 348 * exist. */ 349 if (kif->pfik_ifp != NULL || kif->pfik_group != NULL || 350 kif == V_pfi_all || kif->pfik_flags != 0) 351 return; 352 353 RB_REMOVE(pfi_ifhead, &V_pfi_ifs, kif); 354 355 kif->pfik_flags |= PFI_IFLAG_REFS; 356 357 mtx_lock(&pfi_unlnkdkifs_mtx); 358 LIST_INSERT_HEAD(&V_pfi_unlinked_kifs, kif, pfik_list); 359 mtx_unlock(&pfi_unlnkdkifs_mtx); 360 } 361 362 void 363 pfi_kkif_purge(void) 364 { 365 struct pfi_kkif *kif, *kif1; 366 367 /* 368 * Do naive mark-and-sweep garbage collecting of old kifs. 369 * Reference flag is raised by pf_purge_expired_states(). 370 */ 371 mtx_lock(&pfi_unlnkdkifs_mtx); 372 LIST_FOREACH_SAFE(kif, &V_pfi_unlinked_kifs, pfik_list, kif1) { 373 if (!(kif->pfik_flags & PFI_IFLAG_REFS)) { 374 LIST_REMOVE(kif, pfik_list); 375 pf_kkif_free(kif); 376 } else 377 kif->pfik_flags &= ~PFI_IFLAG_REFS; 378 } 379 mtx_unlock(&pfi_unlnkdkifs_mtx); 380 } 381 382 int 383 pfi_kkif_match(struct pfi_kkif *rule_kif, struct pfi_kkif *packet_kif) 384 { 385 struct ifg_list *p; 386 387 NET_EPOCH_ASSERT(); 388 389 if (rule_kif == NULL || rule_kif == packet_kif) 390 return (1); 391 392 if (rule_kif->pfik_group != NULL) { 393 CK_STAILQ_FOREACH(p, &packet_kif->pfik_ifp->if_groups, ifgl_next) 394 if (p->ifgl_group == rule_kif->pfik_group) 395 return (1); 396 } 397 398 return (0); 399 } 400 401 static void 402 pfi_attach_ifnet(struct ifnet *ifp, struct pfi_kkif *kif) 403 { 404 405 PF_RULES_WASSERT(); 406 407 V_pfi_update++; 408 kif = pfi_kkif_attach(kif, ifp->if_xname); 409 if_ref(ifp); 410 kif->pfik_ifp = ifp; 411 ifp->if_pf_kif = kif; 412 pfi_kkif_update(kif); 413 } 414 415 static void 416 pfi_attach_ifgroup(struct ifg_group *ifg, struct pfi_kkif *kif) 417 { 418 419 PF_RULES_WASSERT(); 420 421 V_pfi_update++; 422 kif = pfi_kkif_attach(kif, ifg->ifg_group); 423 kif->pfik_group = ifg; 424 ifg->ifg_pf_kif = kif; 425 } 426 427 int 428 pfi_match_addr(struct pfi_dynaddr *dyn, struct pf_addr *a, sa_family_t af) 429 { 430 switch (af) { 431 #ifdef INET 432 case AF_INET: 433 switch (dyn->pfid_acnt4) { 434 case 0: 435 return (0); 436 case 1: 437 return (PF_MATCHA(0, &dyn->pfid_addr4, 438 &dyn->pfid_mask4, a, AF_INET)); 439 default: 440 return (pfr_match_addr(dyn->pfid_kt, a, AF_INET)); 441 } 442 break; 443 #endif /* INET */ 444 #ifdef INET6 445 case AF_INET6: 446 switch (dyn->pfid_acnt6) { 447 case 0: 448 return (0); 449 case 1: 450 return (PF_MATCHA(0, &dyn->pfid_addr6, 451 &dyn->pfid_mask6, a, AF_INET6)); 452 default: 453 return (pfr_match_addr(dyn->pfid_kt, a, AF_INET6)); 454 } 455 break; 456 #endif /* INET6 */ 457 default: 458 return (0); 459 } 460 } 461 462 int 463 pfi_dynaddr_setup(struct pf_addr_wrap *aw, sa_family_t af) 464 { 465 struct epoch_tracker et; 466 struct pfi_dynaddr *dyn; 467 char tblname[PF_TABLE_NAME_SIZE]; 468 struct pf_kruleset *ruleset = NULL; 469 struct pfi_kkif *kif; 470 int rv = 0; 471 472 PF_RULES_WASSERT(); 473 KASSERT(aw->type == PF_ADDR_DYNIFTL, ("%s: type %u", 474 __func__, aw->type)); 475 KASSERT(aw->p.dyn == NULL, ("%s: dyn is %p", __func__, aw->p.dyn)); 476 477 if ((dyn = malloc(sizeof(*dyn), PFI_MTYPE, M_NOWAIT | M_ZERO)) == NULL) 478 return (ENOMEM); 479 480 if ((kif = pf_kkif_create(M_NOWAIT)) == NULL) { 481 free(dyn, PFI_MTYPE); 482 return (ENOMEM); 483 } 484 485 if (!strcmp(aw->v.ifname, "self")) 486 dyn->pfid_kif = pfi_kkif_attach(kif, IFG_ALL); 487 else 488 dyn->pfid_kif = pfi_kkif_attach(kif, aw->v.ifname); 489 pfi_kkif_ref(dyn->pfid_kif); 490 491 dyn->pfid_net = pfi_unmask(&aw->v.a.mask); 492 if (af == AF_INET && dyn->pfid_net == 32) 493 dyn->pfid_net = 128; 494 strlcpy(tblname, aw->v.ifname, sizeof(tblname)); 495 if (aw->iflags & PFI_AFLAG_NETWORK) 496 strlcat(tblname, ":network", sizeof(tblname)); 497 if (aw->iflags & PFI_AFLAG_BROADCAST) 498 strlcat(tblname, ":broadcast", sizeof(tblname)); 499 if (aw->iflags & PFI_AFLAG_PEER) 500 strlcat(tblname, ":peer", sizeof(tblname)); 501 if (aw->iflags & PFI_AFLAG_NOALIAS) 502 strlcat(tblname, ":0", sizeof(tblname)); 503 if (dyn->pfid_net != 128) 504 snprintf(tblname + strlen(tblname), 505 sizeof(tblname) - strlen(tblname), "/%d", dyn->pfid_net); 506 if ((ruleset = pf_find_or_create_kruleset(PF_RESERVED_ANCHOR)) == NULL) { 507 rv = ENOMEM; 508 goto _bad; 509 } 510 511 if ((dyn->pfid_kt = pfr_attach_table(ruleset, tblname)) == NULL) { 512 rv = ENOMEM; 513 goto _bad; 514 } 515 516 dyn->pfid_kt->pfrkt_flags |= PFR_TFLAG_ACTIVE; 517 dyn->pfid_iflags = aw->iflags; 518 dyn->pfid_af = af; 519 520 TAILQ_INSERT_TAIL(&dyn->pfid_kif->pfik_dynaddrs, dyn, entry); 521 aw->p.dyn = dyn; 522 NET_EPOCH_ENTER(et); 523 pfi_kkif_update(dyn->pfid_kif); 524 NET_EPOCH_EXIT(et); 525 526 return (0); 527 528 _bad: 529 if (dyn->pfid_kt != NULL) 530 pfr_detach_table(dyn->pfid_kt); 531 if (ruleset != NULL) 532 pf_remove_if_empty_kruleset(ruleset); 533 if (dyn->pfid_kif != NULL) 534 pfi_kkif_unref(dyn->pfid_kif); 535 free(dyn, PFI_MTYPE); 536 537 return (rv); 538 } 539 540 static void 541 pfi_kkif_update(struct pfi_kkif *kif) 542 { 543 struct ifg_list *ifgl; 544 struct ifg_member *ifgm; 545 struct pfi_dynaddr *p; 546 struct pfi_kkif *tmpkif; 547 548 NET_EPOCH_ASSERT(); 549 PF_RULES_WASSERT(); 550 551 /* update all dynaddr */ 552 TAILQ_FOREACH(p, &kif->pfik_dynaddrs, entry) 553 pfi_dynaddr_update(p); 554 555 /* Apply group flags to new members. */ 556 if (kif->pfik_group != NULL) { 557 CK_STAILQ_FOREACH(ifgm, &kif->pfik_group->ifg_members, 558 ifgm_next) { 559 tmpkif = (struct pfi_kkif *)ifgm->ifgm_ifp->if_pf_kif; 560 if (tmpkif == NULL) 561 continue; 562 563 tmpkif->pfik_flags |= kif->pfik_flags; 564 } 565 } 566 567 /* again for all groups kif is member of */ 568 if (kif->pfik_ifp != NULL) { 569 CK_STAILQ_FOREACH(ifgl, &kif->pfik_ifp->if_groups, ifgl_next) 570 pfi_kkif_update((struct pfi_kkif *) 571 ifgl->ifgl_group->ifg_pf_kif); 572 } 573 } 574 575 static void 576 pfi_dynaddr_update(struct pfi_dynaddr *dyn) 577 { 578 struct pfi_kkif *kif; 579 struct pfr_ktable *kt; 580 581 PF_RULES_WASSERT(); 582 KASSERT(dyn && dyn->pfid_kif && dyn->pfid_kt, 583 ("%s: bad argument", __func__)); 584 585 kif = dyn->pfid_kif; 586 kt = dyn->pfid_kt; 587 588 if (kt->pfrkt_larg != V_pfi_update) { 589 /* this table needs to be brought up-to-date */ 590 pfi_table_update(kt, kif, dyn->pfid_net, dyn->pfid_iflags); 591 kt->pfrkt_larg = V_pfi_update; 592 } 593 pfr_dynaddr_update(kt, dyn); 594 } 595 596 static void 597 pfi_table_update(struct pfr_ktable *kt, struct pfi_kkif *kif, int net, int flags) 598 { 599 int e, size2 = 0; 600 struct ifg_member *ifgm; 601 602 NET_EPOCH_ASSERT(); 603 604 V_pfi_buffer_cnt = 0; 605 606 if (kif->pfik_ifp != NULL) 607 pfi_instance_add(kif->pfik_ifp, net, flags); 608 else if (kif->pfik_group != NULL) { 609 CK_STAILQ_FOREACH(ifgm, &kif->pfik_group->ifg_members, ifgm_next) 610 pfi_instance_add(ifgm->ifgm_ifp, net, flags); 611 } 612 613 if ((e = pfr_set_addrs(&kt->pfrkt_t, V_pfi_buffer, V_pfi_buffer_cnt, &size2, 614 NULL, NULL, NULL, 0, PFR_TFLAG_ALLMASK))) 615 printf("%s: cannot set %d new addresses into table %s: %d\n", 616 __func__, V_pfi_buffer_cnt, kt->pfrkt_name, e); 617 } 618 619 static void 620 pfi_instance_add(struct ifnet *ifp, int net, int flags) 621 { 622 struct ifaddr *ia; 623 int got4 = 0, got6 = 0; 624 int net2, af; 625 626 NET_EPOCH_ASSERT(); 627 628 CK_STAILQ_FOREACH(ia, &ifp->if_addrhead, ifa_link) { 629 if (ia->ifa_addr == NULL) 630 continue; 631 af = ia->ifa_addr->sa_family; 632 if (af != AF_INET && af != AF_INET6) 633 continue; 634 /* 635 * XXX: For point-to-point interfaces, (ifname:0) and IPv4, 636 * jump over addresses without a proper route to work 637 * around a problem with ppp not fully removing the 638 * address used during IPCP. 639 */ 640 if ((ifp->if_flags & IFF_POINTOPOINT) && 641 !(ia->ifa_flags & IFA_ROUTE) && 642 (flags & PFI_AFLAG_NOALIAS) && (af == AF_INET)) 643 continue; 644 if ((flags & PFI_AFLAG_BROADCAST) && af == AF_INET6) 645 continue; 646 if ((flags & PFI_AFLAG_BROADCAST) && 647 !(ifp->if_flags & IFF_BROADCAST)) 648 continue; 649 if ((flags & PFI_AFLAG_PEER) && 650 !(ifp->if_flags & IFF_POINTOPOINT)) 651 continue; 652 if ((flags & (PFI_AFLAG_NETWORK | PFI_AFLAG_NOALIAS)) && 653 af == AF_INET6 && 654 IN6_IS_ADDR_LINKLOCAL( 655 &((struct sockaddr_in6 *)ia->ifa_addr)->sin6_addr)) 656 continue; 657 if (flags & PFI_AFLAG_NOALIAS) { 658 if (af == AF_INET && got4) 659 continue; 660 if (af == AF_INET6 && got6) 661 continue; 662 } 663 if (af == AF_INET) 664 got4 = 1; 665 else if (af == AF_INET6) 666 got6 = 1; 667 net2 = net; 668 if (net2 == 128 && (flags & PFI_AFLAG_NETWORK)) { 669 if (af == AF_INET) 670 net2 = pfi_unmask(&((struct sockaddr_in *) 671 ia->ifa_netmask)->sin_addr); 672 else if (af == AF_INET6) 673 net2 = pfi_unmask(&((struct sockaddr_in6 *) 674 ia->ifa_netmask)->sin6_addr); 675 } 676 if (af == AF_INET && net2 > 32) 677 net2 = 32; 678 if (flags & PFI_AFLAG_BROADCAST) 679 pfi_address_add(ia->ifa_broadaddr, af, net2); 680 else if (flags & PFI_AFLAG_PEER) 681 pfi_address_add(ia->ifa_dstaddr, af, net2); 682 else 683 pfi_address_add(ia->ifa_addr, af, net2); 684 } 685 } 686 687 static void 688 pfi_address_add(struct sockaddr *sa, int af, int net) 689 { 690 struct pfr_addr *p; 691 int i; 692 693 if (V_pfi_buffer_cnt >= V_pfi_buffer_max) { 694 int new_max = V_pfi_buffer_max * 2; 695 696 if (new_max > PFI_BUFFER_MAX) { 697 printf("%s: address buffer full (%d/%d)\n", __func__, 698 V_pfi_buffer_cnt, PFI_BUFFER_MAX); 699 return; 700 } 701 p = malloc(new_max * sizeof(*V_pfi_buffer), PFI_MTYPE, 702 M_NOWAIT); 703 if (p == NULL) { 704 printf("%s: no memory to grow buffer (%d/%d)\n", 705 __func__, V_pfi_buffer_cnt, PFI_BUFFER_MAX); 706 return; 707 } 708 memcpy(p, V_pfi_buffer, V_pfi_buffer_max * sizeof(*V_pfi_buffer)); 709 /* no need to zero buffer */ 710 free(V_pfi_buffer, PFI_MTYPE); 711 V_pfi_buffer = p; 712 V_pfi_buffer_max = new_max; 713 } 714 if (af == AF_INET && net > 32) 715 net = 128; 716 p = V_pfi_buffer + V_pfi_buffer_cnt++; 717 bzero(p, sizeof(*p)); 718 p->pfra_af = af; 719 p->pfra_net = net; 720 if (af == AF_INET) 721 p->pfra_ip4addr = ((struct sockaddr_in *)sa)->sin_addr; 722 else if (af == AF_INET6) { 723 p->pfra_ip6addr = ((struct sockaddr_in6 *)sa)->sin6_addr; 724 if (IN6_IS_SCOPE_EMBED(&p->pfra_ip6addr)) 725 p->pfra_ip6addr.s6_addr16[1] = 0; 726 } 727 /* mask network address bits */ 728 if (net < 128) 729 ((caddr_t)p)[p->pfra_net/8] &= ~(0xFF >> (p->pfra_net%8)); 730 for (i = (p->pfra_net+7)/8; i < sizeof(p->pfra_u); i++) 731 ((caddr_t)p)[i] = 0; 732 } 733 734 void 735 pfi_dynaddr_remove(struct pfi_dynaddr *dyn) 736 { 737 738 KASSERT(dyn->pfid_kif != NULL, ("%s: null pfid_kif", __func__)); 739 KASSERT(dyn->pfid_kt != NULL, ("%s: null pfid_kt", __func__)); 740 741 TAILQ_REMOVE(&dyn->pfid_kif->pfik_dynaddrs, dyn, entry); 742 pfi_kkif_unref(dyn->pfid_kif); 743 pfr_detach_table(dyn->pfid_kt); 744 free(dyn, PFI_MTYPE); 745 } 746 747 void 748 pfi_dynaddr_copyout(struct pf_addr_wrap *aw) 749 { 750 751 KASSERT(aw->type == PF_ADDR_DYNIFTL, 752 ("%s: type %u", __func__, aw->type)); 753 754 if (aw->p.dyn == NULL || aw->p.dyn->pfid_kif == NULL) 755 return; 756 aw->p.dyncnt = aw->p.dyn->pfid_acnt4 + aw->p.dyn->pfid_acnt6; 757 } 758 759 static int 760 pfi_kkif_compare(struct pfi_kkif *p, struct pfi_kkif *q) 761 { 762 return (strncmp(p->pfik_name, q->pfik_name, IFNAMSIZ)); 763 } 764 765 void 766 pfi_update_status(const char *name, struct pf_status *pfs) 767 { 768 struct pfi_kkif *p; 769 struct pfi_kif_cmp key; 770 struct ifg_member p_member, *ifgm; 771 CK_STAILQ_HEAD(, ifg_member) ifg_members; 772 int i, j, k; 773 774 strlcpy(key.pfik_name, name, sizeof(key.pfik_name)); 775 p = RB_FIND(pfi_ifhead, &V_pfi_ifs, (struct pfi_kkif *)&key); 776 if (p == NULL) 777 return; 778 779 if (p->pfik_group != NULL) { 780 bcopy(&p->pfik_group->ifg_members, &ifg_members, 781 sizeof(ifg_members)); 782 } else { 783 /* build a temporary list for p only */ 784 bzero(&p_member, sizeof(p_member)); 785 p_member.ifgm_ifp = p->pfik_ifp; 786 CK_STAILQ_INIT(&ifg_members); 787 CK_STAILQ_INSERT_TAIL(&ifg_members, &p_member, ifgm_next); 788 } 789 if (pfs) { 790 bzero(pfs->pcounters, sizeof(pfs->pcounters)); 791 bzero(pfs->bcounters, sizeof(pfs->bcounters)); 792 } 793 CK_STAILQ_FOREACH(ifgm, &ifg_members, ifgm_next) { 794 if (ifgm->ifgm_ifp == NULL || ifgm->ifgm_ifp->if_pf_kif == NULL) 795 continue; 796 p = (struct pfi_kkif *)ifgm->ifgm_ifp->if_pf_kif; 797 798 /* just clear statistics */ 799 if (pfs == NULL) { 800 pf_kkif_zero(p); 801 continue; 802 } 803 for (i = 0; i < 2; i++) 804 for (j = 0; j < 2; j++) 805 for (k = 0; k < 2; k++) { 806 pfs->pcounters[i][j][k] += 807 counter_u64_fetch(p->pfik_packets[i][j][k]); 808 pfs->bcounters[i][j] += 809 counter_u64_fetch(p->pfik_bytes[i][j][k]); 810 } 811 } 812 } 813 814 static void 815 pf_kkif_to_kif(const struct pfi_kkif *kkif, struct pfi_kif *kif) 816 { 817 818 bzero(kif, sizeof(*kif)); 819 strlcpy(kif->pfik_name, kkif->pfik_name, sizeof(kif->pfik_name)); 820 for (int i = 0; i < 2; i++) { 821 for (int j = 0; j < 2; j++) { 822 for (int k = 0; k < 2; k++) { 823 kif->pfik_packets[i][j][k] = 824 counter_u64_fetch(kkif->pfik_packets[i][j][k]); 825 kif->pfik_bytes[i][j][k] = 826 counter_u64_fetch(kkif->pfik_bytes[i][j][k]); 827 } 828 } 829 } 830 kif->pfik_flags = kkif->pfik_flags; 831 kif->pfik_tzero = kkif->pfik_tzero; 832 kif->pfik_rulerefs = kkif->pfik_rulerefs; 833 } 834 835 void 836 pfi_get_ifaces(const char *name, struct pfi_kif *buf, int *size) 837 { 838 struct epoch_tracker et; 839 struct pfi_kkif *p, *nextp; 840 int n = 0; 841 842 NET_EPOCH_ENTER(et); 843 for (p = RB_MIN(pfi_ifhead, &V_pfi_ifs); p; p = nextp) { 844 nextp = RB_NEXT(pfi_ifhead, &V_pfi_ifs, p); 845 if (pfi_skip_if(name, p)) 846 continue; 847 if (*size <= n++) 848 break; 849 if (!p->pfik_tzero) 850 p->pfik_tzero = time_second; 851 pf_kkif_to_kif(p, buf++); 852 nextp = RB_NEXT(pfi_ifhead, &V_pfi_ifs, p); 853 } 854 *size = n; 855 NET_EPOCH_EXIT(et); 856 } 857 858 static int 859 pfi_skip_if(const char *filter, struct pfi_kkif *p) 860 { 861 struct ifg_list *i; 862 int n; 863 864 NET_EPOCH_ASSERT(); 865 866 if (filter == NULL || !*filter) 867 return (0); 868 if (!strcmp(p->pfik_name, filter)) 869 return (0); /* exact match */ 870 n = strlen(filter); 871 if (n < 1 || n >= IFNAMSIZ) 872 return (1); /* sanity check */ 873 if (filter[n-1] >= '0' && filter[n-1] <= '9') 874 return (1); /* group names may not end in a digit */ 875 if (p->pfik_ifp == NULL) 876 return (1); 877 CK_STAILQ_FOREACH(i, &p->pfik_ifp->if_groups, ifgl_next) 878 if (!strncmp(i->ifgl_group->ifg_group, filter, IFNAMSIZ)) 879 return (0); /* iface is in group "filter" */ 880 return (1); 881 } 882 883 int 884 pfi_set_flags(const char *name, int flags) 885 { 886 struct epoch_tracker et; 887 struct pfi_kkif *p, *kif; 888 889 kif = pf_kkif_create(M_NOWAIT); 890 if (kif == NULL) 891 return (ENOMEM); 892 893 NET_EPOCH_ENTER(et); 894 895 kif = pfi_kkif_attach(kif, name); 896 897 RB_FOREACH(p, pfi_ifhead, &V_pfi_ifs) { 898 if (pfi_skip_if(name, p)) 899 continue; 900 p->pfik_flags |= flags; 901 } 902 NET_EPOCH_EXIT(et); 903 return (0); 904 } 905 906 int 907 pfi_clear_flags(const char *name, int flags) 908 { 909 struct epoch_tracker et; 910 struct pfi_kkif *p, *tmp; 911 912 NET_EPOCH_ENTER(et); 913 RB_FOREACH_SAFE(p, pfi_ifhead, &V_pfi_ifs, tmp) { 914 if (pfi_skip_if(name, p)) 915 continue; 916 p->pfik_flags &= ~flags; 917 918 if (p->pfik_ifp == NULL && p->pfik_group == NULL && 919 p->pfik_flags == 0 && p->pfik_rulerefs == 0) { 920 /* Delete this kif. */ 921 RB_REMOVE(pfi_ifhead, &V_pfi_ifs, p); 922 pf_kkif_free(p); 923 } 924 } 925 NET_EPOCH_EXIT(et); 926 return (0); 927 } 928 929 /* from pf_print_state.c */ 930 static int 931 pfi_unmask(void *addr) 932 { 933 struct pf_addr *m = addr; 934 int i = 31, j = 0, b = 0; 935 u_int32_t tmp; 936 937 while (j < 4 && m->addr32[j] == 0xffffffff) { 938 b += 32; 939 j++; 940 } 941 if (j < 4) { 942 tmp = ntohl(m->addr32[j]); 943 for (i = 31; tmp & (1 << i); --i) 944 b++; 945 } 946 return (b); 947 } 948 949 static void 950 pfi_attach_ifnet_event(void *arg __unused, struct ifnet *ifp) 951 { 952 struct epoch_tracker et; 953 struct pfi_kkif *kif; 954 955 if (V_pf_vnet_active == 0) { 956 /* Avoid teardown race in the least expensive way. */ 957 return; 958 } 959 kif = pf_kkif_create(M_NOWAIT); 960 NET_EPOCH_ENTER(et); 961 PF_RULES_WLOCK(); 962 pfi_attach_ifnet(ifp, kif); 963 #ifdef ALTQ 964 pf_altq_ifnet_event(ifp, 0); 965 #endif 966 PF_RULES_WUNLOCK(); 967 NET_EPOCH_EXIT(et); 968 } 969 970 static void 971 pfi_detach_ifnet_event(void *arg __unused, struct ifnet *ifp) 972 { 973 struct epoch_tracker et; 974 struct pfi_kkif *kif = (struct pfi_kkif *)ifp->if_pf_kif; 975 976 if (pfsync_detach_ifnet_ptr) 977 pfsync_detach_ifnet_ptr(ifp); 978 979 if (kif == NULL) 980 return; 981 982 if (V_pf_vnet_active == 0) { 983 /* Avoid teardown race in the least expensive way. */ 984 return; 985 } 986 987 NET_EPOCH_ENTER(et); 988 PF_RULES_WLOCK(); 989 V_pfi_update++; 990 pfi_kkif_update(kif); 991 992 if (kif->pfik_ifp) 993 if_rele(kif->pfik_ifp); 994 995 kif->pfik_ifp = NULL; 996 ifp->if_pf_kif = NULL; 997 #ifdef ALTQ 998 pf_altq_ifnet_event(ifp, 1); 999 #endif 1000 PF_RULES_WUNLOCK(); 1001 NET_EPOCH_EXIT(et); 1002 } 1003 1004 static void 1005 pfi_attach_group_event(void *arg __unused, struct ifg_group *ifg) 1006 { 1007 struct epoch_tracker et; 1008 struct pfi_kkif *kif; 1009 1010 if (V_pf_vnet_active == 0) { 1011 /* Avoid teardown race in the least expensive way. */ 1012 return; 1013 } 1014 kif = pf_kkif_create(M_WAITOK); 1015 NET_EPOCH_ENTER(et); 1016 PF_RULES_WLOCK(); 1017 pfi_attach_ifgroup(ifg, kif); 1018 PF_RULES_WUNLOCK(); 1019 NET_EPOCH_EXIT(et); 1020 } 1021 1022 static void 1023 pfi_change_group_event(void *arg __unused, char *gname) 1024 { 1025 struct epoch_tracker et; 1026 struct pfi_kkif *kif; 1027 1028 if (V_pf_vnet_active == 0) { 1029 /* Avoid teardown race in the least expensive way. */ 1030 return; 1031 } 1032 1033 kif = pf_kkif_create(M_WAITOK); 1034 NET_EPOCH_ENTER(et); 1035 PF_RULES_WLOCK(); 1036 V_pfi_update++; 1037 kif = pfi_kkif_attach(kif, gname); 1038 pfi_kkif_update(kif); 1039 PF_RULES_WUNLOCK(); 1040 NET_EPOCH_EXIT(et); 1041 } 1042 1043 static void 1044 pfi_detach_group_event(void *arg __unused, struct ifg_group *ifg) 1045 { 1046 struct pfi_kkif *kif = (struct pfi_kkif *)ifg->ifg_pf_kif; 1047 1048 if (kif == NULL) 1049 return; 1050 1051 if (V_pf_vnet_active == 0) { 1052 /* Avoid teardown race in the least expensive way. */ 1053 return; 1054 } 1055 PF_RULES_WLOCK(); 1056 V_pfi_update++; 1057 1058 kif->pfik_group = NULL; 1059 ifg->ifg_pf_kif = NULL; 1060 PF_RULES_WUNLOCK(); 1061 } 1062 1063 static void 1064 pfi_ifaddr_event(void *arg __unused, struct ifnet *ifp) 1065 { 1066 1067 KASSERT(ifp, ("ifp == NULL")); 1068 1069 if (ifp->if_pf_kif == NULL) 1070 return; 1071 1072 if (V_pf_vnet_active == 0) { 1073 /* Avoid teardown race in the least expensive way. */ 1074 return; 1075 } 1076 PF_RULES_WLOCK(); 1077 if (ifp->if_pf_kif) { 1078 struct epoch_tracker et; 1079 1080 V_pfi_update++; 1081 NET_EPOCH_ENTER(et); 1082 pfi_kkif_update(ifp->if_pf_kif); 1083 NET_EPOCH_EXIT(et); 1084 } 1085 PF_RULES_WUNLOCK(); 1086 } 1087