1 /* $OpenBSD: pf_if.c,v 1.46 2006/12/13 09:01:59 itojun Exp $ */ 2 3 /* 4 * Copyright 2005 Henning Brauer <henning@openbsd.org> 5 * Copyright 2005 Ryan McBride <mcbride@openbsd.org> 6 * Copyright (c) 2001 Daniel Hartmeier 7 * Copyright (c) 2003 Cedric Berger 8 * All rights reserved. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 14 * - Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * - Redistributions in binary form must reproduce the above 17 * copyright notice, this list of conditions and the following 18 * disclaimer in the documentation and/or other materials provided 19 * with the distribution. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 22 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 23 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 24 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE 25 * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 26 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 27 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 28 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER 29 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN 31 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 32 * POSSIBILITY OF SUCH DAMAGE. 33 */ 34 35 #include "opt_inet.h" 36 #include "opt_inet6.h" 37 38 #include <sys/param.h> 39 #include <sys/systm.h> 40 #include <sys/malloc.h> 41 #include <sys/mbuf.h> 42 #include <sys/eventhandler.h> 43 #include <sys/filio.h> 44 #include <sys/socket.h> 45 #include <sys/socketvar.h> 46 #include <sys/kernel.h> 47 #include <sys/thread2.h> 48 #include <sys/time.h> 49 #include <vm/vm_zone.h> 50 51 #include <net/if.h> 52 #include <net/if_types.h> 53 #include <net/route.h> 54 55 #include <netinet/in.h> 56 #include <netinet/in_var.h> 57 #include <netinet/in_systm.h> 58 #include <netinet/ip.h> 59 #include <netinet/ip_var.h> 60 61 #include <net/pf/pfvar.h> 62 63 #ifdef INET6 64 #include <netinet/ip6.h> 65 #endif /* INET6 */ 66 67 struct pfi_kif *pfi_all = NULL; 68 struct pfi_statehead pfi_statehead; 69 vm_zone_t pfi_addr_pl; 70 struct pfi_ifhead pfi_ifs; 71 long pfi_update = 1; 72 struct pfr_addr *pfi_buffer; 73 int pfi_buffer_cnt; 74 int pfi_buffer_max; 75 76 eventhandler_tag pfi_clone_cookie = NULL; 77 eventhandler_tag pfi_attach_cookie = NULL; 78 eventhandler_tag pfi_detach_cookie = NULL; 79 80 void pfi_kif_update(struct pfi_kif *); 81 void pfi_dynaddr_update(struct pfi_dynaddr *dyn); 82 void pfi_table_update(struct pfr_ktable *, struct pfi_kif *, 83 int, int); 84 void pfi_kifaddr_update(void *); 85 void pfi_instance_add(struct ifnet *, int, int); 86 void pfi_address_add(struct sockaddr *, int, int); 87 int pfi_if_compare(struct pfi_kif *, struct pfi_kif *); 88 int pfi_skip_if(const char *, struct pfi_kif *); 89 int pfi_unmask(void *); 90 void pfi_kifaddr_update_event(void *, struct ifnet *, 91 enum ifaddr_event, struct ifaddr *); 92 /*XXX jl void pfi_attach_clone_event(void *, struct if_clone *);*/ 93 void pfi_attach_ifnet_event(void *, struct ifnet *); 94 void pfi_detach_ifnet_event(void *, struct ifnet *); 95 96 RB_PROTOTYPE(pfi_ifhead, pfi_kif, pfik_tree, pfi_if_compare); 97 RB_GENERATE(pfi_ifhead, pfi_kif, pfik_tree, pfi_if_compare); 98 99 #define PFI_BUFFER_MAX 0x10000 100 MALLOC_DEFINE(PFI_MTYPE, "pf_if", "pf interface table"); 101 102 void 103 pfi_initialize(void) 104 { 105 struct ifnet *ifp; 106 107 if (pfi_all != NULL) /* already initialized */ 108 return; 109 110 TAILQ_INIT(&pfi_statehead); 111 pfi_buffer_max = 64; 112 pfi_buffer = kmalloc(pfi_buffer_max * sizeof(*pfi_buffer), 113 PFI_MTYPE, M_WAITOK); 114 115 if ((pfi_all = pfi_kif_get(IFG_ALL)) == NULL) 116 panic("pfi_kif_get for pfi_all failed"); 117 118 TAILQ_FOREACH(ifp, &ifnet, if_link) { 119 if (ifp->if_dunit != IF_DUNIT_NONE) 120 pfi_attach_ifnet(ifp); 121 } 122 pfi_attach_cookie = EVENTHANDLER_REGISTER(ifnet_attach_event, 123 pfi_attach_ifnet_event, NULL, EVENTHANDLER_PRI_ANY); 124 pfi_detach_cookie = EVENTHANDLER_REGISTER(ifnet_detach_event, 125 pfi_detach_ifnet_event, NULL, EVENTHANDLER_PRI_ANY); 126 /* XXX jl pfi_clone_cookie = EVENTHANDLER_REGISTER(if_clone_event, 127 pfi_attach_clone_event, NULL, EVENTHANDLER_PRI_ANY); */ 128 129 if ((pfi_all = pfi_kif_get(IFG_ALL)) == NULL) 130 panic("pfi_kif_get for pfi_all failed"); 131 } 132 133 void 134 pfi_cleanup(void) 135 { 136 struct pfi_kif *p, key; 137 struct ifnet *ifp; 138 139 EVENTHANDLER_DEREGISTER(ifnet_attach_event, pfi_attach_cookie); 140 EVENTHANDLER_DEREGISTER(ifnet_detach_event, pfi_detach_cookie); 141 EVENTHANDLER_DEREGISTER(if_clone_event, pfi_clone_cookie); 142 143 /* release PFI_IFLAG_INSTANCE */ 144 TAILQ_FOREACH(ifp, &ifnet, if_link) { 145 strlcpy(key.pfik_name, ifp->if_xname, sizeof(key.pfik_name)); 146 p = RB_FIND(pfi_ifhead, &pfi_ifs, &key); 147 if (p != NULL) 148 pfi_detach_ifnet(ifp); 149 } 150 151 /* XXX clear all other interface group */ 152 while ((p = RB_MIN(pfi_ifhead, &pfi_ifs))) { 153 RB_REMOVE(pfi_ifhead, &pfi_ifs, p); 154 155 kfree(p, PFI_MTYPE); 156 } 157 kfree(pfi_buffer, PFI_MTYPE); 158 pfi_buffer = NULL; 159 pfi_all = NULL; 160 } 161 162 /* 163 * Wrapper functions for FreeBSD eventhandler 164 */ 165 void 166 pfi_kifaddr_update_event(void *arg, struct ifnet *ifp, 167 enum ifaddr_event event __unused, struct ifaddr *ifa __unused) 168 { 169 struct pfi_kif *p = arg; 170 171 /* 172 * Check to see if it is 'our' interface as we do not have per 173 * interface hooks and thus get an update for every interface. 174 */ 175 if (p && p->pfik_ifp == ifp) 176 pfi_kifaddr_update(p); 177 } 178 179 /* XXX jl 180 void 181 pfi_attach_clone_event(void *arg __unused, struct if_clone *ifc) 182 { 183 pfi_attach_clone(ifc); 184 } 185 */ 186 187 void 188 pfi_attach_ifnet_event(void *arg __unused, struct ifnet *ifp) 189 { 190 if (ifp->if_dunit != IF_DUNIT_NONE) 191 pfi_attach_ifnet(ifp); 192 } 193 194 void 195 pfi_detach_ifnet_event(void *arg __unused, struct ifnet *ifp) 196 { 197 pfi_detach_ifnet(ifp); 198 } 199 200 struct pfi_kif * 201 pfi_kif_get(const char *kif_name) 202 { 203 struct pfi_kif *kif; 204 struct pfi_kif_cmp s; 205 206 bzero(&s, sizeof(s)); 207 strlcpy(s.pfik_ifname, kif_name, sizeof(s.pfik_ifname)); 208 if ((kif = RB_FIND(pfi_ifhead, &pfi_ifs, (struct pfi_kif *)&s)) != NULL) 209 return (kif); 210 211 /* create new one */ 212 if ((kif = kmalloc(sizeof(*kif), PFI_MTYPE, M_WAITOK)) == NULL) 213 return (NULL); 214 215 bzero(kif, sizeof(*kif)); 216 strlcpy(kif->pfik_name, kif_name, sizeof(kif->pfik_name)); 217 kif->pfik_tzero = time_second; 218 TAILQ_INIT(&kif->pfik_dynaddrs); 219 220 RB_INSERT(pfi_ifhead, &pfi_ifs, kif); 221 return (kif); 222 } 223 224 void 225 pfi_kif_ref(struct pfi_kif *kif, enum pfi_kif_refs what) 226 { 227 switch (what) { 228 case PFI_KIF_REF_RULE: 229 kif->pfik_rules++; 230 break; 231 case PFI_KIF_REF_STATE: 232 if (!kif->pfik_states++) 233 TAILQ_INSERT_TAIL(&pfi_statehead, kif, pfik_w_states); 234 break; 235 default: 236 panic("pfi_kif_ref with unknown type"); 237 } 238 } 239 240 void 241 pfi_kif_unref(struct pfi_kif *kif, enum pfi_kif_refs what) 242 { 243 if (kif == NULL) 244 return; 245 246 switch (what) { 247 case PFI_KIF_REF_NONE: 248 break; 249 case PFI_KIF_REF_RULE: 250 if (kif->pfik_rules <= 0) { 251 kprintf("pfi_kif_unref: rules refcount <= 0\n"); 252 return; 253 } 254 kif->pfik_rules--; 255 break; 256 case PFI_KIF_REF_STATE: 257 if (kif->pfik_states <= 0) { 258 kprintf("pfi_kif_unref: state refcount <= 0\n"); 259 return; 260 } 261 if (!--kif->pfik_states) 262 TAILQ_REMOVE(&pfi_statehead, kif, pfik_w_states); 263 break; 264 default: 265 panic("pfi_kif_unref with unknown type"); 266 } 267 268 if (kif->pfik_ifp != NULL || kif->pfik_group != NULL || kif == pfi_all) 269 return; 270 271 if (kif->pfik_rules || kif->pfik_states) 272 return; 273 274 RB_REMOVE(pfi_ifhead, &pfi_ifs, kif); 275 kfree(kif, PFI_MTYPE); 276 } 277 278 int 279 pfi_kif_match(struct pfi_kif *rule_kif, struct pfi_kif *packet_kif) 280 { 281 struct ifg_list *p; 282 283 if (rule_kif == NULL || rule_kif == packet_kif) 284 return (1); 285 286 if (rule_kif->pfik_group != NULL) 287 TAILQ_FOREACH(p, &packet_kif->pfik_ifp->if_groups, ifgl_next) 288 if (p->ifgl_group == rule_kif->pfik_group) 289 return (1); 290 291 return (0); 292 } 293 294 void 295 pfi_attach_ifnet(struct ifnet *ifp) 296 { 297 struct pfi_kif *kif; 298 299 pfi_initialize(); 300 crit_enter(); 301 pfi_update++; 302 if ((kif = pfi_kif_get(ifp->if_xname)) == NULL) 303 panic("pfi_kif_get failed"); 304 305 kif->pfik_ifp = ifp; 306 ifp->if_pf_kif = (caddr_t)kif; 307 308 pfi_kif_update(kif); 309 310 crit_exit(); 311 } 312 313 void 314 pfi_detach_ifnet(struct ifnet *ifp) 315 { 316 struct pfi_kif *kif; 317 318 if ((kif = (struct pfi_kif *)ifp->if_pf_kif) == NULL) 319 return; 320 321 crit_enter(); 322 pfi_update++; 323 pfi_kif_update(kif); 324 325 kif->pfik_ifp = NULL; 326 ifp->if_pf_kif = NULL; 327 pfi_kif_unref(kif, PFI_KIF_REF_NONE); 328 crit_exit(); 329 } 330 331 void 332 pfi_attach_ifgroup(struct ifg_group *ifg) 333 { 334 struct pfi_kif *kif; 335 336 pfi_initialize(); 337 crit_enter(); 338 pfi_update++; 339 if ((kif = pfi_kif_get(ifg->ifg_group)) == NULL) 340 panic("pfi_kif_get failed"); 341 342 kif->pfik_group = ifg; 343 ifg->ifg_pf_kif = (caddr_t)kif; 344 345 crit_exit(); 346 } 347 348 void 349 pfi_detach_ifgroup(struct ifg_group *ifg) 350 { 351 struct pfi_kif *kif; 352 353 if ((kif = (struct pfi_kif *)ifg->ifg_pf_kif) == NULL) 354 return; 355 356 crit_enter(); 357 pfi_update++; 358 359 kif->pfik_group = NULL; 360 ifg->ifg_pf_kif = NULL; 361 pfi_kif_unref(kif, PFI_KIF_REF_NONE); 362 crit_exit(); 363 } 364 365 void 366 pfi_group_change(const char *group) 367 { 368 struct pfi_kif *kif; 369 370 crit_enter(); 371 pfi_update++; 372 if ((kif = pfi_kif_get(group)) == NULL) 373 panic("pfi_kif_get failed"); 374 375 pfi_kif_update(kif); 376 377 crit_exit(); 378 } 379 380 int 381 pfi_match_addr(struct pfi_dynaddr *dyn, struct pf_addr *a, sa_family_t af) 382 { 383 switch (af) { 384 #ifdef INET 385 case AF_INET: 386 switch (dyn->pfid_acnt4) { 387 case 0: 388 return (0); 389 case 1: 390 return (PF_MATCHA(0, &dyn->pfid_addr4, 391 &dyn->pfid_mask4, a, AF_INET)); 392 default: 393 return (pfr_match_addr(dyn->pfid_kt, a, AF_INET)); 394 } 395 break; 396 #endif /* INET */ 397 #ifdef INET6 398 case AF_INET6: 399 switch (dyn->pfid_acnt6) { 400 case 0: 401 return (0); 402 case 1: 403 return (PF_MATCHA(0, &dyn->pfid_addr6, 404 &dyn->pfid_mask6, a, AF_INET6)); 405 default: 406 return (pfr_match_addr(dyn->pfid_kt, a, AF_INET6)); 407 } 408 break; 409 #endif /* INET6 */ 410 default: 411 return (0); 412 } 413 } 414 415 int 416 pfi_dynaddr_setup(struct pf_addr_wrap *aw, sa_family_t af) 417 { 418 struct pfi_dynaddr *dyn; 419 char tblname[PF_TABLE_NAME_SIZE]; 420 struct pf_ruleset *ruleset = NULL; 421 int rv = 0; 422 423 if (aw->type != PF_ADDR_DYNIFTL) 424 return (0); 425 if ((dyn = pool_get(&pfi_addr_pl, PR_NOWAIT)) == NULL) 426 return (1); 427 bzero(dyn, sizeof(*dyn)); 428 429 crit_enter(); 430 if (!strcmp(aw->v.ifname, "self")) 431 dyn->pfid_kif = pfi_kif_get(IFG_ALL); 432 else 433 dyn->pfid_kif = pfi_kif_get(aw->v.ifname); 434 if (dyn->pfid_kif == NULL) { 435 rv = 1; 436 goto _bad; 437 } 438 pfi_kif_ref(dyn->pfid_kif, PFI_KIF_REF_RULE); 439 440 dyn->pfid_net = pfi_unmask(&aw->v.a.mask); 441 if (af == AF_INET && dyn->pfid_net == 32) 442 dyn->pfid_net = 128; 443 strlcpy(tblname, aw->v.ifname, sizeof(tblname)); 444 if (aw->iflags & PFI_AFLAG_NETWORK) 445 strlcat(tblname, ":network", sizeof(tblname)); 446 if (aw->iflags & PFI_AFLAG_BROADCAST) 447 strlcat(tblname, ":broadcast", sizeof(tblname)); 448 if (aw->iflags & PFI_AFLAG_PEER) 449 strlcat(tblname, ":peer", sizeof(tblname)); 450 if (aw->iflags & PFI_AFLAG_NOALIAS) 451 strlcat(tblname, ":0", sizeof(tblname)); 452 if (dyn->pfid_net != 128) 453 ksnprintf(tblname + strlen(tblname), 454 sizeof(tblname) - strlen(tblname), "/%d", dyn->pfid_net); 455 if ((ruleset = pf_find_or_create_ruleset(PF_RESERVED_ANCHOR)) == NULL) { 456 rv = 1; 457 goto _bad; 458 } 459 460 if ((dyn->pfid_kt = pfr_attach_table(ruleset, tblname)) == NULL) { 461 rv = 1; 462 goto _bad; 463 } 464 465 dyn->pfid_kt->pfrkt_flags |= PFR_TFLAG_ACTIVE; 466 dyn->pfid_iflags = aw->iflags; 467 dyn->pfid_af = af; 468 469 TAILQ_INSERT_TAIL(&dyn->pfid_kif->pfik_dynaddrs, dyn, entry); 470 aw->p.dyn = dyn; 471 pfi_kif_update(dyn->pfid_kif); 472 crit_exit(); 473 return (0); 474 475 _bad: 476 if (dyn->pfid_kt != NULL) 477 pfr_detach_table(dyn->pfid_kt); 478 if (ruleset != NULL) 479 pf_remove_if_empty_ruleset(ruleset); 480 if (dyn->pfid_kif != NULL) 481 pfi_kif_unref(dyn->pfid_kif, PFI_KIF_REF_RULE); 482 pool_put(&pfi_addr_pl, dyn); 483 crit_exit(); 484 return (rv); 485 } 486 487 void 488 pfi_kif_update(struct pfi_kif *kif) 489 { 490 struct ifg_list *ifgl; 491 struct pfi_dynaddr *p; 492 493 /* update all dynaddr */ 494 TAILQ_FOREACH(p, &kif->pfik_dynaddrs, entry) 495 pfi_dynaddr_update(p); 496 497 /* again for all groups kif is member of */ 498 if (kif->pfik_ifp != NULL) 499 TAILQ_FOREACH(ifgl, &kif->pfik_ifp->if_groups, ifgl_next) 500 pfi_kif_update((struct pfi_kif *) 501 ifgl->ifgl_group->ifg_pf_kif); 502 } 503 504 void 505 pfi_dynaddr_update(struct pfi_dynaddr *dyn) 506 { 507 struct pfi_kif *kif; 508 struct pfr_ktable *kt; 509 510 if (dyn == NULL || dyn->pfid_kif == NULL || dyn->pfid_kt == NULL) 511 panic("pfi_dynaddr_update"); 512 513 kif = dyn->pfid_kif; 514 kt = dyn->pfid_kt; 515 516 if (kt->pfrkt_larg != pfi_update) { 517 /* this table needs to be brought up-to-date */ 518 pfi_table_update(kt, kif, dyn->pfid_net, dyn->pfid_iflags); 519 kt->pfrkt_larg = pfi_update; 520 } 521 pfr_dynaddr_update(kt, dyn); 522 } 523 524 void 525 pfi_table_update(struct pfr_ktable *kt, struct pfi_kif *kif, int net, int flags) 526 { 527 int e, size2 = 0; 528 struct ifg_member *ifgm; 529 530 pfi_buffer_cnt = 0; 531 532 if (kif->pfik_ifp != NULL) 533 pfi_instance_add(kif->pfik_ifp, net, flags); 534 else if (kif->pfik_group != NULL) 535 TAILQ_FOREACH(ifgm, &kif->pfik_group->ifg_members, ifgm_next) 536 pfi_instance_add(ifgm->ifgm_ifp, net, flags); 537 538 if ((e = pfr_set_addrs(&kt->pfrkt_t, pfi_buffer, pfi_buffer_cnt, &size2, 539 NULL, NULL, NULL, 0, PFR_TFLAG_ALLMASK))) 540 kprintf("pfi_table_update: cannot set %d new addresses " 541 "into table %s: %d\n", pfi_buffer_cnt, kt->pfrkt_name, e); 542 } 543 544 void 545 pfi_instance_add(struct ifnet *ifp, int net, int flags) 546 { 547 struct ifaddr_container *ifac; 548 int got4 = 0, got6 = 0; 549 int net2, af; 550 551 if (ifp == NULL) 552 return; 553 TAILQ_FOREACH(ifac, &ifp->if_addrheads[mycpuid], ifa_link) { 554 struct ifaddr *ia = ifac->ifa; 555 556 if (ia->ifa_addr == NULL) 557 continue; 558 af = ia->ifa_addr->sa_family; 559 if (af != AF_INET && af != AF_INET6) 560 continue; 561 /* 562 * XXX: For point-to-point interfaces, (ifname:0) and IPv4, 563 * jump over address without a proper route to work 564 * around a problem with ppp not fully removing the 565 * address used during IPCP. 566 */ 567 if ((ifp->if_flags & IFF_POINTOPOINT) && 568 !(ia->ifa_flags & IFA_ROUTE) && 569 (flags & PFI_AFLAG_NOALIAS) && (af == AF_INET)) 570 continue; 571 if ((flags & PFI_AFLAG_BROADCAST) && af == AF_INET6) 572 continue; 573 if ((flags & PFI_AFLAG_BROADCAST) && 574 !(ifp->if_flags & IFF_BROADCAST)) 575 continue; 576 if ((flags & PFI_AFLAG_PEER) && 577 !(ifp->if_flags & IFF_POINTOPOINT)) 578 continue; 579 if ((flags & PFI_AFLAG_NETWORK) && af == AF_INET6 && 580 IN6_IS_ADDR_LINKLOCAL( 581 &((struct sockaddr_in6 *)ia->ifa_addr)->sin6_addr)) 582 continue; 583 if (flags & PFI_AFLAG_NOALIAS) { 584 if (af == AF_INET && got4) 585 continue; 586 if (af == AF_INET6 && got6) 587 continue; 588 } 589 if (af == AF_INET) 590 got4 = 1; 591 else if (af == AF_INET6) 592 got6 = 1; 593 net2 = net; 594 if (net2 == 128 && (flags & PFI_AFLAG_NETWORK)) { 595 if (af == AF_INET) 596 net2 = pfi_unmask(&((struct sockaddr_in *) 597 ia->ifa_netmask)->sin_addr); 598 else if (af == AF_INET6) 599 net2 = pfi_unmask(&((struct sockaddr_in6 *) 600 ia->ifa_netmask)->sin6_addr); 601 } 602 if (af == AF_INET && net2 > 32) 603 net2 = 32; 604 if (flags & PFI_AFLAG_BROADCAST) 605 pfi_address_add(ia->ifa_broadaddr, af, net2); 606 else if (flags & PFI_AFLAG_PEER) 607 pfi_address_add(ia->ifa_dstaddr, af, net2); 608 else 609 pfi_address_add(ia->ifa_addr, af, net2); 610 } 611 } 612 613 void 614 pfi_address_add(struct sockaddr *sa, int af, int net) 615 { 616 struct pfr_addr *p; 617 int i; 618 619 if (pfi_buffer_cnt >= pfi_buffer_max) { 620 int new_max = pfi_buffer_max * 2; 621 622 if (new_max > PFI_BUFFER_MAX) { 623 kprintf("pfi_address_add: address buffer full (%d/%d)\n", 624 pfi_buffer_cnt, PFI_BUFFER_MAX); 625 return; 626 } 627 p = kmalloc(new_max * sizeof(*pfi_buffer), PFI_MTYPE, M_WAITOK); 628 if (p == NULL) { 629 kprintf("pfi_address_add: no memory to grow buffer " 630 "(%d/%d)\n", pfi_buffer_cnt, PFI_BUFFER_MAX); 631 return; 632 } 633 memcpy(pfi_buffer, p, pfi_buffer_cnt * sizeof(*pfi_buffer)); 634 /* no need to zero buffer */ 635 kfree(pfi_buffer, PFI_MTYPE); 636 pfi_buffer = p; 637 pfi_buffer_max = new_max; 638 } 639 if (af == AF_INET && net > 32) 640 net = 128; 641 p = pfi_buffer + pfi_buffer_cnt++; 642 bzero(p, sizeof(*p)); 643 p->pfra_af = af; 644 p->pfra_net = net; 645 if (af == AF_INET) 646 p->pfra_ip4addr = ((struct sockaddr_in *)sa)->sin_addr; 647 else if (af == AF_INET6) { 648 p->pfra_ip6addr = ((struct sockaddr_in6 *)sa)->sin6_addr; 649 if (IN6_IS_SCOPE_EMBED(&p->pfra_ip6addr)) 650 p->pfra_ip6addr.s6_addr16[1] = 0; 651 } 652 /* mask network address bits */ 653 if (net < 128) 654 ((caddr_t)p)[p->pfra_net/8] &= ~(0xFF >> (p->pfra_net%8)); 655 for (i = (p->pfra_net+7)/8; i < sizeof(p->pfra_u); i++) 656 ((caddr_t)p)[i] = 0; 657 } 658 659 void 660 pfi_dynaddr_remove(struct pf_addr_wrap *aw) 661 { 662 if (aw->type != PF_ADDR_DYNIFTL || aw->p.dyn == NULL || 663 aw->p.dyn->pfid_kif == NULL || aw->p.dyn->pfid_kt == NULL) 664 return; 665 666 crit_enter(); 667 TAILQ_REMOVE(&aw->p.dyn->pfid_kif->pfik_dynaddrs, aw->p.dyn, entry); 668 pfi_kif_unref(aw->p.dyn->pfid_kif, PFI_KIF_REF_RULE); 669 aw->p.dyn->pfid_kif = NULL; 670 pfr_detach_table(aw->p.dyn->pfid_kt); 671 aw->p.dyn->pfid_kt = NULL; 672 pool_put(&pfi_addr_pl, aw->p.dyn); 673 aw->p.dyn = NULL; 674 crit_exit(); 675 } 676 677 void 678 pfi_dynaddr_copyout(struct pf_addr_wrap *aw) 679 { 680 if (aw->type != PF_ADDR_DYNIFTL || aw->p.dyn == NULL || 681 aw->p.dyn->pfid_kif == NULL) 682 return; 683 aw->p.dyncnt = aw->p.dyn->pfid_acnt4 + aw->p.dyn->pfid_acnt6; 684 } 685 686 void 687 pfi_kifaddr_update(void *v) 688 { 689 struct pfi_kif *kif = (struct pfi_kif *)v; 690 691 crit_enter(); 692 pfi_update++; 693 pfi_kif_update(kif); 694 crit_exit(); 695 } 696 697 int 698 pfi_if_compare(struct pfi_kif *p, struct pfi_kif *q) 699 { 700 return (strncmp(p->pfik_name, q->pfik_name, IFNAMSIZ)); 701 } 702 703 void 704 pfi_fill_oldstatus(struct pf_status *pfs) 705 { 706 struct pfi_kif *p; 707 struct pfi_kif_cmp key; 708 int i, j, k; 709 710 strlcpy(key.pfik_ifname, pfs->ifname, sizeof(key.pfik_ifname)); 711 crit_enter(); 712 p = RB_FIND(pfi_ifhead, &pfi_ifs, (struct pfi_kif *)&key); 713 if (p == NULL) { 714 crit_exit(); 715 return; 716 } 717 bzero(pfs->pcounters, sizeof(pfs->pcounters)); 718 bzero(pfs->bcounters, sizeof(pfs->bcounters)); 719 for (i = 0; i < 2; i++) 720 for (j = 0; j < 2; j++) 721 for (k = 0; k < 2; k++) { 722 pfs->pcounters[i][j][k] = 723 p->pfik_packets[i][j][k]; 724 pfs->bcounters[i][j] += 725 p->pfik_bytes[i][j][k]; 726 } 727 crit_exit(); 728 } 729 730 int 731 pfi_clr_istats(const char *name) 732 { 733 struct pfi_kif *p; 734 735 crit_enter(); 736 RB_FOREACH(p, pfi_ifhead, &pfi_ifs) { 737 if (pfi_skip_if(name, p)) 738 continue; 739 bzero(p->pfik_packets, sizeof(p->pfik_packets)); 740 bzero(p->pfik_bytes, sizeof(p->pfik_bytes)); 741 p->pfik_tzero = time_second; 742 } 743 crit_exit(); 744 745 return (0); 746 } 747 748 int 749 pfi_get_ifaces(const char *name, struct pfi_kif *buf, int *size) 750 { 751 struct pfi_kif *p, *nextp; 752 int n = 0; 753 754 crit_enter(); 755 for (p = RB_MIN(pfi_ifhead, &pfi_ifs); p; p = nextp) { 756 nextp = RB_NEXT(pfi_ifhead, &pfi_ifs, p); 757 if (pfi_skip_if(name, p)) 758 continue; 759 if (*size > n++) { 760 if (!p->pfik_tzero) 761 p->pfik_tzero = time_second; 762 pfi_kif_ref(p, PFI_KIF_REF_RULE); 763 if (copyout(p, buf++, sizeof(*buf))) { 764 pfi_kif_unref(p, PFI_KIF_REF_RULE); 765 crit_exit(); 766 return (EFAULT); 767 } 768 nextp = RB_NEXT(pfi_ifhead, &pfi_ifs, p); 769 pfi_kif_unref(p, PFI_KIF_REF_RULE); 770 } 771 } 772 crit_exit(); 773 *size = n; 774 return (0); 775 } 776 777 int 778 pfi_skip_if(const char *filter, struct pfi_kif *p) 779 { 780 int n; 781 782 if (filter == NULL || !*filter) 783 return (0); 784 if (!strcmp(p->pfik_name, filter)) 785 return (0); /* exact match */ 786 n = strlen(filter); 787 if (n < 1 || n >= IFNAMSIZ) 788 return (1); /* sanity check */ 789 if (filter[n-1] >= '0' && filter[n-1] <= '9') 790 return (1); /* only do exact match in that case */ 791 if (strncmp(p->pfik_name, filter, n)) 792 return (1); /* prefix doesn't match */ 793 return (p->pfik_name[n] < '0' || p->pfik_name[n] > '9'); 794 } 795 796 int 797 pfi_set_flags(const char *name, int flags) 798 { 799 struct pfi_kif *p; 800 801 crit_enter(); 802 RB_FOREACH(p, pfi_ifhead, &pfi_ifs) { 803 if (pfi_skip_if(name, p)) 804 continue; 805 p->pfik_flags |= flags; 806 } 807 crit_exit(); 808 return (0); 809 } 810 811 int 812 pfi_clear_flags(const char *name, int flags) 813 { 814 struct pfi_kif *p; 815 816 crit_enter(); 817 RB_FOREACH(p, pfi_ifhead, &pfi_ifs) { 818 if (pfi_skip_if(name, p)) 819 continue; 820 p->pfik_flags &= ~flags; 821 } 822 crit_exit(); 823 return (0); 824 } 825 826 /* from pf_print_state.c */ 827 int 828 pfi_unmask(void *addr) 829 { 830 struct pf_addr *m = addr; 831 int i = 31, j = 0, b = 0; 832 u_int32_t tmp; 833 834 while (j < 4 && m->addr32[j] == 0xffffffff) { 835 b += 32; 836 j++; 837 } 838 if (j < 4) { 839 tmp = ntohl(m->addr32[j]); 840 for (i = 31; tmp & (1 << i); --i) 841 b++; 842 } 843 return (b); 844 } 845 846