1 /* $OpenBSD: pf_if.c,v 1.54 2008/06/14 16:55:28 mk 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 strlcpy(kif->pfik_name, kif_name, sizeof(kif->pfik_name)); 214 kif->pfik_tzero = time_second; 215 TAILQ_INIT(&kif->pfik_dynaddrs); 216 217 RB_INSERT(pfi_ifhead, &pfi_ifs, kif); 218 return (kif); 219 } 220 221 void 222 pfi_kif_ref(struct pfi_kif *kif, enum pfi_kif_refs what) 223 { 224 switch (what) { 225 case PFI_KIF_REF_RULE: 226 kif->pfik_rules++; 227 break; 228 case PFI_KIF_REF_STATE: 229 kif->pfik_states++; 230 break; 231 default: 232 panic("pfi_kif_ref with unknown type"); 233 } 234 } 235 236 void 237 pfi_kif_unref(struct pfi_kif *kif, enum pfi_kif_refs what) 238 { 239 if (kif == NULL) 240 return; 241 242 switch (what) { 243 case PFI_KIF_REF_NONE: 244 break; 245 case PFI_KIF_REF_RULE: 246 if (kif->pfik_rules <= 0) { 247 kprintf("pfi_kif_unref: rules refcount <= 0\n"); 248 return; 249 } 250 kif->pfik_rules--; 251 break; 252 case PFI_KIF_REF_STATE: 253 if (kif->pfik_states <= 0) { 254 kprintf("pfi_kif_unref: state refcount <= 0\n"); 255 return; 256 } 257 kif->pfik_states--; 258 break; 259 default: 260 panic("pfi_kif_unref with unknown type"); 261 } 262 263 if (kif->pfik_ifp != NULL || kif->pfik_group != NULL || kif == pfi_all) 264 return; 265 266 if (kif->pfik_rules || kif->pfik_states) 267 return; 268 269 RB_REMOVE(pfi_ifhead, &pfi_ifs, kif); 270 kfree(kif, PFI_MTYPE); 271 } 272 273 int 274 pfi_kif_match(struct pfi_kif *rule_kif, struct pfi_kif *packet_kif) 275 { 276 struct ifg_list *p; 277 278 if (rule_kif == NULL || rule_kif == packet_kif) 279 return (1); 280 281 if (rule_kif->pfik_group != NULL) 282 TAILQ_FOREACH(p, &packet_kif->pfik_ifp->if_groups, ifgl_next) 283 if (p->ifgl_group == rule_kif->pfik_group) 284 return (1); 285 286 return (0); 287 } 288 289 void 290 pfi_attach_ifnet(struct ifnet *ifp) 291 { 292 struct pfi_kif *kif; 293 294 pfi_initialize(); 295 crit_enter(); 296 pfi_update++; 297 if ((kif = pfi_kif_get(ifp->if_xname)) == NULL) 298 panic("pfi_kif_get failed"); 299 300 kif->pfik_ifp = ifp; 301 ifp->if_pf_kif = (caddr_t)kif; 302 303 pfi_kif_update(kif); 304 305 crit_exit(); 306 } 307 308 void 309 pfi_detach_ifnet(struct ifnet *ifp) 310 { 311 struct pfi_kif *kif; 312 313 if ((kif = (struct pfi_kif *)ifp->if_pf_kif) == NULL) 314 return; 315 316 crit_enter(); 317 pfi_update++; 318 pfi_kif_update(kif); 319 320 kif->pfik_ifp = NULL; 321 ifp->if_pf_kif = NULL; 322 pfi_kif_unref(kif, PFI_KIF_REF_NONE); 323 crit_exit(); 324 } 325 326 void 327 pfi_attach_ifgroup(struct ifg_group *ifg) 328 { 329 struct pfi_kif *kif; 330 331 pfi_initialize(); 332 crit_enter(); 333 pfi_update++; 334 if ((kif = pfi_kif_get(ifg->ifg_group)) == NULL) 335 panic("pfi_kif_get failed"); 336 337 kif->pfik_group = ifg; 338 ifg->ifg_pf_kif = (caddr_t)kif; 339 340 crit_exit(); 341 } 342 343 void 344 pfi_detach_ifgroup(struct ifg_group *ifg) 345 { 346 struct pfi_kif *kif; 347 348 if ((kif = (struct pfi_kif *)ifg->ifg_pf_kif) == NULL) 349 return; 350 351 crit_enter(); 352 pfi_update++; 353 354 kif->pfik_group = NULL; 355 ifg->ifg_pf_kif = NULL; 356 pfi_kif_unref(kif, PFI_KIF_REF_NONE); 357 crit_exit(); 358 } 359 360 void 361 pfi_group_change(const char *group) 362 { 363 struct pfi_kif *kif; 364 365 crit_enter(); 366 pfi_update++; 367 if ((kif = pfi_kif_get(group)) == NULL) 368 panic("pfi_kif_get failed"); 369 370 pfi_kif_update(kif); 371 372 crit_exit(); 373 } 374 375 int 376 pfi_match_addr(struct pfi_dynaddr *dyn, struct pf_addr *a, sa_family_t af) 377 { 378 switch (af) { 379 #ifdef INET 380 case AF_INET: 381 switch (dyn->pfid_acnt4) { 382 case 0: 383 return (0); 384 case 1: 385 return (PF_MATCHA(0, &dyn->pfid_addr4, 386 &dyn->pfid_mask4, a, AF_INET)); 387 default: 388 return (pfr_match_addr(dyn->pfid_kt, a, AF_INET)); 389 } 390 break; 391 #endif /* INET */ 392 #ifdef INET6 393 case AF_INET6: 394 switch (dyn->pfid_acnt6) { 395 case 0: 396 return (0); 397 case 1: 398 return (PF_MATCHA(0, &dyn->pfid_addr6, 399 &dyn->pfid_mask6, a, AF_INET6)); 400 default: 401 return (pfr_match_addr(dyn->pfid_kt, a, AF_INET6)); 402 } 403 break; 404 #endif /* INET6 */ 405 default: 406 return (0); 407 } 408 } 409 410 int 411 pfi_dynaddr_setup(struct pf_addr_wrap *aw, sa_family_t af) 412 { 413 struct pfi_dynaddr *dyn; 414 char tblname[PF_TABLE_NAME_SIZE]; 415 struct pf_ruleset *ruleset = NULL; 416 int rv = 0; 417 418 if (aw->type != PF_ADDR_DYNIFTL) 419 return (0); 420 if ((dyn = pool_get(&pfi_addr_pl, PR_WAITOK | PR_LIMITFAIL | PR_ZERO)) 421 == NULL) 422 return (1); 423 424 crit_enter(); 425 if (!strcmp(aw->v.ifname, "self")) 426 dyn->pfid_kif = pfi_kif_get(IFG_ALL); 427 else 428 dyn->pfid_kif = pfi_kif_get(aw->v.ifname); 429 if (dyn->pfid_kif == NULL) { 430 rv = 1; 431 goto _bad; 432 } 433 pfi_kif_ref(dyn->pfid_kif, PFI_KIF_REF_RULE); 434 435 dyn->pfid_net = pfi_unmask(&aw->v.a.mask); 436 if (af == AF_INET && dyn->pfid_net == 32) 437 dyn->pfid_net = 128; 438 strlcpy(tblname, aw->v.ifname, sizeof(tblname)); 439 if (aw->iflags & PFI_AFLAG_NETWORK) 440 strlcat(tblname, ":network", sizeof(tblname)); 441 if (aw->iflags & PFI_AFLAG_BROADCAST) 442 strlcat(tblname, ":broadcast", sizeof(tblname)); 443 if (aw->iflags & PFI_AFLAG_PEER) 444 strlcat(tblname, ":peer", sizeof(tblname)); 445 if (aw->iflags & PFI_AFLAG_NOALIAS) 446 strlcat(tblname, ":0", sizeof(tblname)); 447 if (dyn->pfid_net != 128) 448 ksnprintf(tblname + strlen(tblname), 449 sizeof(tblname) - strlen(tblname), "/%d", dyn->pfid_net); 450 if ((ruleset = pf_find_or_create_ruleset(PF_RESERVED_ANCHOR)) == NULL) { 451 rv = 1; 452 goto _bad; 453 } 454 455 if ((dyn->pfid_kt = pfr_attach_table(ruleset, tblname)) == NULL) { 456 rv = 1; 457 goto _bad; 458 } 459 460 dyn->pfid_kt->pfrkt_flags |= PFR_TFLAG_ACTIVE; 461 dyn->pfid_iflags = aw->iflags; 462 dyn->pfid_af = af; 463 464 TAILQ_INSERT_TAIL(&dyn->pfid_kif->pfik_dynaddrs, dyn, entry); 465 aw->p.dyn = dyn; 466 pfi_kif_update(dyn->pfid_kif); 467 crit_exit(); 468 return (0); 469 470 _bad: 471 if (dyn->pfid_kt != NULL) 472 pfr_detach_table(dyn->pfid_kt); 473 if (ruleset != NULL) 474 pf_remove_if_empty_ruleset(ruleset); 475 if (dyn->pfid_kif != NULL) 476 pfi_kif_unref(dyn->pfid_kif, PFI_KIF_REF_RULE); 477 pool_put(&pfi_addr_pl, dyn); 478 crit_exit(); 479 return (rv); 480 } 481 482 void 483 pfi_kif_update(struct pfi_kif *kif) 484 { 485 struct ifg_list *ifgl; 486 struct pfi_dynaddr *p; 487 488 /* update all dynaddr */ 489 TAILQ_FOREACH(p, &kif->pfik_dynaddrs, entry) 490 pfi_dynaddr_update(p); 491 492 /* again for all groups kif is member of */ 493 if (kif->pfik_ifp != NULL) 494 TAILQ_FOREACH(ifgl, &kif->pfik_ifp->if_groups, ifgl_next) 495 pfi_kif_update((struct pfi_kif *) 496 ifgl->ifgl_group->ifg_pf_kif); 497 } 498 499 void 500 pfi_dynaddr_update(struct pfi_dynaddr *dyn) 501 { 502 struct pfi_kif *kif; 503 struct pfr_ktable *kt; 504 505 if (dyn == NULL || dyn->pfid_kif == NULL || dyn->pfid_kt == NULL) 506 panic("pfi_dynaddr_update"); 507 508 kif = dyn->pfid_kif; 509 kt = dyn->pfid_kt; 510 511 if (kt->pfrkt_larg != pfi_update) { 512 /* this table needs to be brought up-to-date */ 513 pfi_table_update(kt, kif, dyn->pfid_net, dyn->pfid_iflags); 514 kt->pfrkt_larg = pfi_update; 515 } 516 pfr_dynaddr_update(kt, dyn); 517 } 518 519 void 520 pfi_table_update(struct pfr_ktable *kt, struct pfi_kif *kif, int net, int flags) 521 { 522 int e, size2 = 0; 523 struct ifg_member *ifgm; 524 525 pfi_buffer_cnt = 0; 526 527 if (kif->pfik_ifp != NULL) 528 pfi_instance_add(kif->pfik_ifp, net, flags); 529 else if (kif->pfik_group != NULL) 530 TAILQ_FOREACH(ifgm, &kif->pfik_group->ifg_members, ifgm_next) 531 pfi_instance_add(ifgm->ifgm_ifp, net, flags); 532 533 if ((e = pfr_set_addrs(&kt->pfrkt_t, pfi_buffer, pfi_buffer_cnt, &size2, 534 NULL, NULL, NULL, 0, PFR_TFLAG_ALLMASK))) 535 kprintf("pfi_table_update: cannot set %d new addresses " 536 "into table %s: %d\n", pfi_buffer_cnt, kt->pfrkt_name, e); 537 } 538 539 void 540 pfi_instance_add(struct ifnet *ifp, int net, int flags) 541 { 542 struct ifaddr_container *ifac; 543 int got4 = 0, got6 = 0; 544 int net2, af; 545 546 if (ifp == NULL) 547 return; 548 TAILQ_FOREACH(ifac, &ifp->if_addrheads[mycpuid], ifa_link) { 549 struct ifaddr *ia = ifac->ifa; 550 551 if (ia->ifa_addr == NULL) 552 continue; 553 af = ia->ifa_addr->sa_family; 554 if (af != AF_INET && af != AF_INET6) 555 continue; 556 /* 557 * XXX: For point-to-point interfaces, (ifname:0) and IPv4, 558 * jump over address without a proper route to work 559 * around a problem with ppp not fully removing the 560 * address used during IPCP. 561 */ 562 if ((ifp->if_flags & IFF_POINTOPOINT) && 563 !(ia->ifa_flags & IFA_ROUTE) && 564 (flags & PFI_AFLAG_NOALIAS) && (af == AF_INET)) 565 continue; 566 if ((flags & PFI_AFLAG_BROADCAST) && af == AF_INET6) 567 continue; 568 if ((flags & PFI_AFLAG_BROADCAST) && 569 !(ifp->if_flags & IFF_BROADCAST)) 570 continue; 571 if ((flags & PFI_AFLAG_PEER) && 572 !(ifp->if_flags & IFF_POINTOPOINT)) 573 continue; 574 if ((flags & PFI_AFLAG_NETWORK) && af == AF_INET6 && 575 IN6_IS_ADDR_LINKLOCAL( 576 &((struct sockaddr_in6 *)ia->ifa_addr)->sin6_addr)) 577 continue; 578 if (flags & PFI_AFLAG_NOALIAS) { 579 if (af == AF_INET && got4) 580 continue; 581 if (af == AF_INET6 && got6) 582 continue; 583 } 584 if (af == AF_INET) 585 got4 = 1; 586 else if (af == AF_INET6) 587 got6 = 1; 588 net2 = net; 589 if (net2 == 128 && (flags & PFI_AFLAG_NETWORK)) { 590 if (af == AF_INET) 591 net2 = pfi_unmask(&((struct sockaddr_in *) 592 ia->ifa_netmask)->sin_addr); 593 else if (af == AF_INET6) 594 net2 = pfi_unmask(&((struct sockaddr_in6 *) 595 ia->ifa_netmask)->sin6_addr); 596 } 597 if (af == AF_INET && net2 > 32) 598 net2 = 32; 599 if (flags & PFI_AFLAG_BROADCAST) 600 pfi_address_add(ia->ifa_broadaddr, af, net2); 601 else if (flags & PFI_AFLAG_PEER) 602 pfi_address_add(ia->ifa_dstaddr, af, net2); 603 else 604 pfi_address_add(ia->ifa_addr, af, net2); 605 } 606 } 607 608 void 609 pfi_address_add(struct sockaddr *sa, int af, int net) 610 { 611 struct pfr_addr *p; 612 int i; 613 614 if (pfi_buffer_cnt >= pfi_buffer_max) { 615 int new_max = pfi_buffer_max * 2; 616 617 if (new_max > PFI_BUFFER_MAX) { 618 kprintf("pfi_address_add: address buffer full (%d/%d)\n", 619 pfi_buffer_cnt, PFI_BUFFER_MAX); 620 return; 621 } 622 p = kmalloc(new_max * sizeof(*pfi_buffer), PFI_MTYPE, M_WAITOK); 623 if (p == NULL) { 624 kprintf("pfi_address_add: no memory to grow buffer " 625 "(%d/%d)\n", pfi_buffer_cnt, PFI_BUFFER_MAX); 626 return; 627 } 628 memcpy(pfi_buffer, p, pfi_buffer_cnt * sizeof(*pfi_buffer)); 629 /* no need to zero buffer */ 630 kfree(pfi_buffer, PFI_MTYPE); 631 pfi_buffer = p; 632 pfi_buffer_max = new_max; 633 } 634 if (af == AF_INET && net > 32) 635 net = 128; 636 p = pfi_buffer + pfi_buffer_cnt++; 637 bzero(p, sizeof(*p)); 638 p->pfra_af = af; 639 p->pfra_net = net; 640 if (af == AF_INET) 641 p->pfra_ip4addr = ((struct sockaddr_in *)sa)->sin_addr; 642 else if (af == AF_INET6) { 643 p->pfra_ip6addr = ((struct sockaddr_in6 *)sa)->sin6_addr; 644 if (IN6_IS_SCOPE_EMBED(&p->pfra_ip6addr)) 645 p->pfra_ip6addr.s6_addr16[1] = 0; 646 } 647 /* mask network address bits */ 648 if (net < 128) 649 ((caddr_t)p)[p->pfra_net/8] &= ~(0xFF >> (p->pfra_net%8)); 650 for (i = (p->pfra_net+7)/8; i < sizeof(p->pfra_u); i++) 651 ((caddr_t)p)[i] = 0; 652 } 653 654 void 655 pfi_dynaddr_remove(struct pf_addr_wrap *aw) 656 { 657 if (aw->type != PF_ADDR_DYNIFTL || aw->p.dyn == NULL || 658 aw->p.dyn->pfid_kif == NULL || aw->p.dyn->pfid_kt == NULL) 659 return; 660 661 crit_enter(); 662 TAILQ_REMOVE(&aw->p.dyn->pfid_kif->pfik_dynaddrs, aw->p.dyn, entry); 663 pfi_kif_unref(aw->p.dyn->pfid_kif, PFI_KIF_REF_RULE); 664 aw->p.dyn->pfid_kif = NULL; 665 pfr_detach_table(aw->p.dyn->pfid_kt); 666 aw->p.dyn->pfid_kt = NULL; 667 pool_put(&pfi_addr_pl, aw->p.dyn); 668 aw->p.dyn = NULL; 669 crit_exit(); 670 } 671 672 void 673 pfi_dynaddr_copyout(struct pf_addr_wrap *aw) 674 { 675 if (aw->type != PF_ADDR_DYNIFTL || aw->p.dyn == NULL || 676 aw->p.dyn->pfid_kif == NULL) 677 return; 678 aw->p.dyncnt = aw->p.dyn->pfid_acnt4 + aw->p.dyn->pfid_acnt6; 679 } 680 681 void 682 pfi_kifaddr_update(void *v) 683 { 684 struct pfi_kif *kif = (struct pfi_kif *)v; 685 686 crit_enter(); 687 pfi_update++; 688 pfi_kif_update(kif); 689 crit_exit(); 690 } 691 692 int 693 pfi_if_compare(struct pfi_kif *p, struct pfi_kif *q) 694 { 695 return (strncmp(p->pfik_name, q->pfik_name, IFNAMSIZ)); 696 } 697 698 void 699 pfi_update_status(const char *name, struct pf_status *pfs) 700 { 701 struct pfi_kif *p; 702 struct pfi_kif_cmp key; 703 struct ifg_member p_member, *ifgm; 704 TAILQ_HEAD(, ifg_member) ifg_members; 705 int i, j, k; 706 707 strlcpy(key.pfik_ifname, name, sizeof(key.pfik_ifname)); 708 crit_enter(); 709 p = RB_FIND(pfi_ifhead, &pfi_ifs, (struct pfi_kif *)&key); 710 if (p == NULL) { 711 crit_exit(); 712 return; 713 } 714 if (p->pfik_group != NULL) { 715 bcopy(&p->pfik_group->ifg_members, &ifg_members, 716 sizeof(ifg_members)); 717 } else { 718 /* build a temporary list for p only */ 719 bzero(&p_member, sizeof(p_member)); 720 p_member.ifgm_ifp = p->pfik_ifp; 721 TAILQ_INIT(&ifg_members); 722 TAILQ_INSERT_TAIL(&ifg_members, &p_member, ifgm_next); 723 } 724 if (pfs) { 725 bzero(pfs->pcounters, sizeof(pfs->pcounters)); 726 bzero(pfs->bcounters, sizeof(pfs->bcounters)); 727 } 728 TAILQ_FOREACH(ifgm, &ifg_members, ifgm_next) { 729 if (ifgm->ifgm_ifp == NULL) 730 continue; 731 p = (struct pfi_kif *)ifgm->ifgm_ifp->if_pf_kif; 732 733 /* just clear statistics */ 734 if (pfs == NULL) { 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 continue; 739 } 740 for (i = 0; i < 2; i++) 741 for (j = 0; j < 2; j++) 742 for (k = 0; k < 2; k++) { 743 pfs->pcounters[i][j][k] += 744 p->pfik_packets[i][j][k]; 745 pfs->bcounters[i][j] += 746 p->pfik_bytes[i][j][k]; 747 } 748 } 749 crit_exit(); 750 } 751 752 int 753 pfi_get_ifaces(const char *name, struct pfi_kif *buf, int *size) 754 { 755 struct pfi_kif *p, *nextp; 756 int n = 0; 757 758 crit_enter(); 759 for (p = RB_MIN(pfi_ifhead, &pfi_ifs); p; p = nextp) { 760 nextp = RB_NEXT(pfi_ifhead, &pfi_ifs, p); 761 if (pfi_skip_if(name, p)) 762 continue; 763 if (*size > n++) { 764 if (!p->pfik_tzero) 765 p->pfik_tzero = time_second; 766 pfi_kif_ref(p, PFI_KIF_REF_RULE); 767 if (copyout(p, buf++, sizeof(*buf))) { 768 pfi_kif_unref(p, PFI_KIF_REF_RULE); 769 crit_exit(); 770 return (EFAULT); 771 } 772 nextp = RB_NEXT(pfi_ifhead, &pfi_ifs, p); 773 pfi_kif_unref(p, PFI_KIF_REF_RULE); 774 } 775 } 776 crit_exit(); 777 *size = n; 778 return (0); 779 } 780 781 int 782 pfi_skip_if(const char *filter, struct pfi_kif *p) 783 { 784 int n; 785 786 if (filter == NULL || !*filter) 787 return (0); 788 if (!strcmp(p->pfik_name, filter)) 789 return (0); /* exact match */ 790 n = strlen(filter); 791 if (n < 1 || n >= IFNAMSIZ) 792 return (1); /* sanity check */ 793 if (filter[n-1] >= '0' && filter[n-1] <= '9') 794 return (1); /* only do exact match in that case */ 795 if (strncmp(p->pfik_name, filter, n)) 796 return (1); /* prefix doesn't match */ 797 return (p->pfik_name[n] < '0' || p->pfik_name[n] > '9'); 798 } 799 800 int 801 pfi_set_flags(const char *name, int flags) 802 { 803 struct pfi_kif *p; 804 805 crit_enter(); 806 RB_FOREACH(p, pfi_ifhead, &pfi_ifs) { 807 if (pfi_skip_if(name, p)) 808 continue; 809 p->pfik_flags |= flags; 810 } 811 crit_exit(); 812 return (0); 813 } 814 815 int 816 pfi_clear_flags(const char *name, int flags) 817 { 818 struct pfi_kif *p; 819 820 crit_enter(); 821 RB_FOREACH(p, pfi_ifhead, &pfi_ifs) { 822 if (pfi_skip_if(name, p)) 823 continue; 824 p->pfik_flags &= ~flags; 825 } 826 crit_exit(); 827 return (0); 828 } 829 830 /* from pf_print_state.c */ 831 int 832 pfi_unmask(void *addr) 833 { 834 struct pf_addr *m = addr; 835 int i = 31, j = 0, b = 0; 836 u_int32_t tmp; 837 838 while (j < 4 && m->addr32[j] == 0xffffffff) { 839 b += 32; 840 j++; 841 } 842 if (j < 4) { 843 tmp = ntohl(m->addr32[j]); 844 for (i = 31; tmp & (1 << i); --i) 845 b++; 846 } 847 return (b); 848 } 849 850