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