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 50 #include <net/if.h> 51 #include <net/if_types.h> 52 #include <net/route.h> 53 54 #include <netinet/in.h> 55 #include <netinet/in_var.h> 56 #include <netinet/in_systm.h> 57 #include <netinet/ip.h> 58 #include <netinet/ip_var.h> 59 60 #include <net/pf/pfvar.h> 61 62 #ifdef INET6 63 #include <netinet/ip6.h> 64 #endif /* INET6 */ 65 66 struct pfi_kif *pfi_all = NULL; 67 struct pfi_ifhead pfi_ifs; 68 long pfi_update = 1; 69 struct pfr_addr *pfi_buffer; 70 int pfi_buffer_cnt; 71 int pfi_buffer_max; 72 73 eventhandler_tag pfi_clone_cookie = NULL; 74 eventhandler_tag pfi_attach_cookie = NULL; 75 eventhandler_tag pfi_detach_cookie = NULL; 76 77 void pfi_kif_update(struct pfi_kif *); 78 void pfi_dynaddr_update(struct pfi_dynaddr *dyn); 79 void pfi_table_update(struct pfr_ktable *, struct pfi_kif *, 80 int, int); 81 void pfi_kifaddr_update(void *); 82 void pfi_instance_add(struct ifnet *, int, int); 83 void pfi_address_add(struct sockaddr *, int, int); 84 int pfi_if_compare(struct pfi_kif *, struct pfi_kif *); 85 int pfi_skip_if(const char *, struct pfi_kif *); 86 int pfi_unmask(void *); 87 void pfi_kifaddr_update_event(void *, struct ifnet *, 88 enum ifaddr_event, struct ifaddr *); 89 /*XXX jl void pfi_attach_clone_event(void *, struct if_clone *);*/ 90 void pfi_attach_ifnet_event(void *, struct ifnet *); 91 void pfi_detach_ifnet_event(void *, struct ifnet *); 92 93 RB_PROTOTYPE(pfi_ifhead, pfi_kif, pfik_tree, pfi_if_compare); 94 RB_GENERATE(pfi_ifhead, pfi_kif, pfik_tree, pfi_if_compare); 95 96 #define PFI_BUFFER_MAX 0x10000 97 MALLOC_DEFINE(PFI_MTYPE, "pf_if", "pf interface table"); 98 static MALLOC_DEFINE(M_PFIADDRPL, "pfiaddrpl", "pf interface address pool list"); 99 100 101 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 /* XXX ALMOST MPSAFE */ 117 ifnet_lock(); 118 TAILQ_FOREACH(ifp, &ifnetlist, if_link) { 119 if (ifp->if_dunit != IF_DUNIT_NONE) 120 pfi_attach_ifnet(ifp); 121 } 122 ifnet_unlock(); 123 pfi_attach_cookie = EVENTHANDLER_REGISTER(ifnet_attach_event, 124 pfi_attach_ifnet_event, NULL, EVENTHANDLER_PRI_ANY); 125 pfi_detach_cookie = EVENTHANDLER_REGISTER(ifnet_detach_event, 126 pfi_detach_ifnet_event, NULL, EVENTHANDLER_PRI_ANY); 127 /* XXX jl pfi_clone_cookie = EVENTHANDLER_REGISTER(if_clone_event, 128 pfi_attach_clone_event, NULL, EVENTHANDLER_PRI_ANY); */ 129 130 if ((pfi_all = pfi_kif_get(IFG_ALL)) == NULL) 131 panic("pfi_kif_get for pfi_all failed"); 132 } 133 134 void 135 pfi_cleanup(void) 136 { 137 struct pfi_kif *p, key; 138 struct ifnet *ifp; 139 140 EVENTHANDLER_DEREGISTER(ifnet_attach_event, pfi_attach_cookie); 141 EVENTHANDLER_DEREGISTER(ifnet_detach_event, pfi_detach_cookie); 142 EVENTHANDLER_DEREGISTER(if_clone_event, pfi_clone_cookie); 143 144 /* release PFI_IFLAG_INSTANCE */ 145 /* XXX ALMOST MPSAFE */ 146 ifnet_lock(); 147 TAILQ_FOREACH(ifp, &ifnetlist, if_link) { 148 strlcpy(key.pfik_name, ifp->if_xname, sizeof(key.pfik_name)); 149 p = RB_FIND(pfi_ifhead, &pfi_ifs, &key); 150 if (p != NULL) 151 pfi_detach_ifnet(ifp); 152 } 153 ifnet_unlock(); 154 155 /* XXX clear all other interface group */ 156 while ((p = RB_MIN(pfi_ifhead, &pfi_ifs))) { 157 RB_REMOVE(pfi_ifhead, &pfi_ifs, p); 158 159 kfree(p, PFI_MTYPE); 160 } 161 kfree(pfi_buffer, PFI_MTYPE); 162 pfi_buffer = NULL; 163 pfi_all = NULL; 164 } 165 166 /* 167 * Wrapper functions for FreeBSD eventhandler 168 */ 169 void 170 pfi_kifaddr_update_event(void *arg, struct ifnet *ifp, 171 enum ifaddr_event event __unused, struct ifaddr *ifa __unused) 172 { 173 struct pfi_kif *p = arg; 174 175 /* 176 * Check to see if it is 'our' interface as we do not have per 177 * interface hooks and thus get an update for every interface. 178 */ 179 if (p && p->pfik_ifp == ifp) 180 pfi_kifaddr_update(p); 181 } 182 183 /* XXX jl 184 void 185 pfi_attach_clone_event(void *arg __unused, struct if_clone *ifc) 186 { 187 pfi_attach_clone(ifc); 188 } 189 */ 190 191 void 192 pfi_attach_ifnet_event(void *arg __unused, struct ifnet *ifp) 193 { 194 if (ifp->if_dunit != IF_DUNIT_NONE) 195 pfi_attach_ifnet(ifp); 196 } 197 198 void 199 pfi_detach_ifnet_event(void *arg __unused, struct ifnet *ifp) 200 { 201 pfi_detach_ifnet(ifp); 202 } 203 204 struct pfi_kif * 205 pfi_kif_get(const char *kif_name) 206 { 207 struct pfi_kif *kif; 208 struct pfi_kif_cmp s; 209 210 bzero(&s, sizeof(s)); 211 strlcpy(s.pfik_ifname, kif_name, sizeof(s.pfik_ifname)); 212 if ((kif = RB_FIND(pfi_ifhead, &pfi_ifs, (struct pfi_kif *)&s)) != NULL) 213 return (kif); 214 215 /* create new one */ 216 if ((kif = kmalloc(sizeof(*kif), PFI_MTYPE, M_WAITOK | M_ZERO)) == NULL) 217 return (NULL); 218 219 strlcpy(kif->pfik_name, kif_name, sizeof(kif->pfik_name)); 220 kif->pfik_tzero = time_second; 221 TAILQ_INIT(&kif->pfik_dynaddrs); 222 223 RB_INSERT(pfi_ifhead, &pfi_ifs, kif); 224 return (kif); 225 } 226 227 void 228 pfi_kif_ref(struct pfi_kif *kif, enum pfi_kif_refs what) 229 { 230 switch (what) { 231 case PFI_KIF_REF_RULE: 232 kif->pfik_rules++; 233 break; 234 case PFI_KIF_REF_STATE: 235 kif->pfik_states++; 236 break; 237 default: 238 panic("pfi_kif_ref with unknown type"); 239 } 240 } 241 242 void 243 pfi_kif_unref(struct pfi_kif *kif, enum pfi_kif_refs what) 244 { 245 if (kif == NULL) 246 return; 247 248 switch (what) { 249 case PFI_KIF_REF_NONE: 250 break; 251 case PFI_KIF_REF_RULE: 252 if (kif->pfik_rules <= 0) { 253 kprintf("pfi_kif_unref: rules refcount <= 0\n"); 254 return; 255 } 256 kif->pfik_rules--; 257 break; 258 case PFI_KIF_REF_STATE: 259 if (kif->pfik_states <= 0) { 260 kprintf("pfi_kif_unref: state refcount <= 0\n"); 261 return; 262 } 263 kif->pfik_states--; 264 break; 265 default: 266 panic("pfi_kif_unref with unknown type"); 267 } 268 269 if (kif->pfik_ifp != NULL || kif->pfik_group != NULL || kif == pfi_all) 270 return; 271 272 if (kif->pfik_rules || kif->pfik_states) 273 return; 274 275 RB_REMOVE(pfi_ifhead, &pfi_ifs, kif); 276 kfree(kif, PFI_MTYPE); 277 } 278 279 int 280 pfi_kif_match(struct pfi_kif *rule_kif, struct pfi_kif *packet_kif) 281 { 282 struct ifg_list *p; 283 284 if (rule_kif == NULL || rule_kif == packet_kif) 285 return (1); 286 287 if (rule_kif->pfik_group != NULL) 288 TAILQ_FOREACH(p, &packet_kif->pfik_ifp->if_groups, ifgl_next) 289 if (p->ifgl_group == rule_kif->pfik_group) 290 return (1); 291 292 return (0); 293 } 294 295 void 296 pfi_attach_ifnet(struct ifnet *ifp) 297 { 298 struct pfi_kif *kif; 299 300 pfi_initialize(); 301 crit_enter(); 302 pfi_update++; 303 if ((kif = pfi_kif_get(ifp->if_xname)) == NULL) 304 panic("pfi_kif_get failed"); 305 306 kif->pfik_ifp = ifp; 307 ifp->if_pf_kif = (caddr_t)kif; 308 309 pfi_kif_update(kif); 310 311 crit_exit(); 312 } 313 314 void 315 pfi_detach_ifnet(struct ifnet *ifp) 316 { 317 struct pfi_kif *kif; 318 319 if ((kif = (struct pfi_kif *)ifp->if_pf_kif) == NULL) 320 return; 321 322 crit_enter(); 323 pfi_update++; 324 pfi_kif_update(kif); 325 326 kif->pfik_ifp = NULL; 327 ifp->if_pf_kif = NULL; 328 pfi_kif_unref(kif, PFI_KIF_REF_NONE); 329 crit_exit(); 330 } 331 332 void 333 pfi_attach_ifgroup(struct ifg_group *ifg) 334 { 335 struct pfi_kif *kif; 336 337 pfi_initialize(); 338 crit_enter(); 339 pfi_update++; 340 if ((kif = pfi_kif_get(ifg->ifg_group)) == NULL) 341 panic("pfi_kif_get failed"); 342 343 kif->pfik_group = ifg; 344 ifg->ifg_pf_kif = (caddr_t)kif; 345 346 crit_exit(); 347 } 348 349 void 350 pfi_detach_ifgroup(struct ifg_group *ifg) 351 { 352 struct pfi_kif *kif; 353 354 if ((kif = (struct pfi_kif *)ifg->ifg_pf_kif) == NULL) 355 return; 356 357 crit_enter(); 358 pfi_update++; 359 360 kif->pfik_group = NULL; 361 ifg->ifg_pf_kif = NULL; 362 pfi_kif_unref(kif, PFI_KIF_REF_NONE); 363 crit_exit(); 364 } 365 366 void 367 pfi_group_change(const char *group) 368 { 369 struct pfi_kif *kif; 370 371 crit_enter(); 372 pfi_update++; 373 if ((kif = pfi_kif_get(group)) == NULL) 374 panic("pfi_kif_get failed"); 375 376 pfi_kif_update(kif); 377 378 crit_exit(); 379 } 380 381 int 382 pfi_match_addr(struct pfi_dynaddr *dyn, struct pf_addr *a, sa_family_t af) 383 { 384 switch (af) { 385 #ifdef INET 386 case AF_INET: 387 switch (dyn->pfid_acnt4) { 388 case 0: 389 return (0); 390 case 1: 391 return (PF_MATCHA(0, &dyn->pfid_addr4, 392 &dyn->pfid_mask4, a, AF_INET)); 393 default: 394 return (pfr_match_addr(dyn->pfid_kt, a, AF_INET)); 395 } 396 break; 397 #endif /* INET */ 398 #ifdef INET6 399 case AF_INET6: 400 switch (dyn->pfid_acnt6) { 401 case 0: 402 return (0); 403 case 1: 404 return (PF_MATCHA(0, &dyn->pfid_addr6, 405 &dyn->pfid_mask6, a, AF_INET6)); 406 default: 407 return (pfr_match_addr(dyn->pfid_kt, a, AF_INET6)); 408 } 409 break; 410 #endif /* INET6 */ 411 default: 412 return (0); 413 } 414 } 415 416 int 417 pfi_dynaddr_setup(struct pf_addr_wrap *aw, sa_family_t af) 418 { 419 struct pfi_dynaddr *dyn; 420 char tblname[PF_TABLE_NAME_SIZE]; 421 struct pf_ruleset *ruleset = NULL; 422 int rv = 0; 423 424 if (aw->type != PF_ADDR_DYNIFTL) 425 return (0); 426 if ((dyn = kmalloc(sizeof(struct pfi_dynaddr), M_PFIADDRPL, M_WAITOK|M_NULLOK|M_ZERO)) 427 == NULL) 428 return (1); 429 430 crit_enter(); 431 if (!strcmp(aw->v.ifname, "self")) 432 dyn->pfid_kif = pfi_kif_get(IFG_ALL); 433 else 434 dyn->pfid_kif = pfi_kif_get(aw->v.ifname); 435 if (dyn->pfid_kif == NULL) { 436 rv = 1; 437 goto _bad; 438 } 439 pfi_kif_ref(dyn->pfid_kif, PFI_KIF_REF_RULE); 440 441 dyn->pfid_net = pfi_unmask(&aw->v.a.mask); 442 if (af == AF_INET && dyn->pfid_net == 32) 443 dyn->pfid_net = 128; 444 strlcpy(tblname, aw->v.ifname, sizeof(tblname)); 445 if (aw->iflags & PFI_AFLAG_NETWORK) 446 strlcat(tblname, ":network", sizeof(tblname)); 447 if (aw->iflags & PFI_AFLAG_BROADCAST) 448 strlcat(tblname, ":broadcast", sizeof(tblname)); 449 if (aw->iflags & PFI_AFLAG_PEER) 450 strlcat(tblname, ":peer", sizeof(tblname)); 451 if (aw->iflags & PFI_AFLAG_NOALIAS) 452 strlcat(tblname, ":0", sizeof(tblname)); 453 if (dyn->pfid_net != 128) 454 ksnprintf(tblname + strlen(tblname), 455 sizeof(tblname) - strlen(tblname), "/%d", dyn->pfid_net); 456 if ((ruleset = pf_find_or_create_ruleset(PF_RESERVED_ANCHOR)) == NULL) { 457 rv = 1; 458 goto _bad; 459 } 460 461 if ((dyn->pfid_kt = pfr_attach_table(ruleset, tblname)) == NULL) { 462 rv = 1; 463 goto _bad; 464 } 465 466 dyn->pfid_kt->pfrkt_flags |= PFR_TFLAG_ACTIVE; 467 dyn->pfid_iflags = aw->iflags; 468 dyn->pfid_af = af; 469 470 TAILQ_INSERT_TAIL(&dyn->pfid_kif->pfik_dynaddrs, dyn, entry); 471 aw->p.dyn = dyn; 472 pfi_kif_update(dyn->pfid_kif); 473 crit_exit(); 474 return (0); 475 476 _bad: 477 if (dyn->pfid_kt != NULL) 478 pfr_detach_table(dyn->pfid_kt); 479 if (ruleset != NULL) 480 pf_remove_if_empty_ruleset(ruleset); 481 if (dyn->pfid_kif != NULL) 482 pfi_kif_unref(dyn->pfid_kif, PFI_KIF_REF_RULE); 483 kfree(dyn, M_PFIADDRPL); 484 crit_exit(); 485 return (rv); 486 } 487 488 void 489 pfi_kif_update(struct pfi_kif *kif) 490 { 491 struct ifg_list *ifgl; 492 struct pfi_dynaddr *p; 493 494 /* update all dynaddr */ 495 TAILQ_FOREACH(p, &kif->pfik_dynaddrs, entry) 496 pfi_dynaddr_update(p); 497 498 /* again for all groups kif is member of */ 499 if (kif->pfik_ifp != NULL) 500 TAILQ_FOREACH(ifgl, &kif->pfik_ifp->if_groups, ifgl_next) 501 pfi_kif_update((struct pfi_kif *) 502 ifgl->ifgl_group->ifg_pf_kif); 503 } 504 505 void 506 pfi_dynaddr_update(struct pfi_dynaddr *dyn) 507 { 508 struct pfi_kif *kif; 509 struct pfr_ktable *kt; 510 511 if (dyn == NULL || dyn->pfid_kif == NULL || dyn->pfid_kt == NULL) 512 panic("pfi_dynaddr_update"); 513 514 kif = dyn->pfid_kif; 515 kt = dyn->pfid_kt; 516 517 if (kt->pfrkt_larg != pfi_update) { 518 /* this table needs to be brought up-to-date */ 519 pfi_table_update(kt, kif, dyn->pfid_net, dyn->pfid_iflags); 520 kt->pfrkt_larg = pfi_update; 521 } 522 pfr_dynaddr_update(kt, dyn); 523 } 524 525 void 526 pfi_table_update(struct pfr_ktable *kt, struct pfi_kif *kif, int net, int flags) 527 { 528 int e, size2 = 0; 529 struct ifg_member *ifgm; 530 531 pfi_buffer_cnt = 0; 532 533 if (kif->pfik_ifp != NULL) 534 pfi_instance_add(kif->pfik_ifp, net, flags); 535 else if (kif->pfik_group != NULL) 536 TAILQ_FOREACH(ifgm, &kif->pfik_group->ifg_members, ifgm_next) 537 pfi_instance_add(ifgm->ifgm_ifp, net, flags); 538 539 if ((e = pfr_set_addrs(&kt->pfrkt_t, pfi_buffer, pfi_buffer_cnt, &size2, 540 NULL, NULL, NULL, 0, PFR_TFLAG_ALLMASK))) 541 kprintf("pfi_table_update: cannot set %d new addresses " 542 "into table %s: %d\n", pfi_buffer_cnt, kt->pfrkt_name, e); 543 } 544 545 void 546 pfi_instance_add(struct ifnet *ifp, int net, int flags) 547 { 548 struct ifaddr_container *ifac; 549 int got4 = 0, got6 = 0; 550 int net2, af; 551 552 if (ifp == NULL) 553 return; 554 TAILQ_FOREACH(ifac, &ifp->if_addrheads[mycpuid], ifa_link) { 555 struct ifaddr *ia = ifac->ifa; 556 557 if (ia->ifa_addr == NULL) 558 continue; 559 af = ia->ifa_addr->sa_family; 560 if (af != AF_INET && af != AF_INET6) 561 continue; 562 /* 563 * XXX: For point-to-point interfaces, (ifname:0) and IPv4, 564 * jump over address without a proper route to work 565 * around a problem with ppp not fully removing the 566 * address used during IPCP. 567 */ 568 if ((ifp->if_flags & IFF_POINTOPOINT) && 569 !(ia->ifa_flags & IFA_ROUTE) && 570 (flags & PFI_AFLAG_NOALIAS) && (af == AF_INET)) 571 continue; 572 if ((flags & PFI_AFLAG_BROADCAST) && af == AF_INET6) 573 continue; 574 if ((flags & PFI_AFLAG_BROADCAST) && 575 !(ifp->if_flags & IFF_BROADCAST)) 576 continue; 577 if ((flags & PFI_AFLAG_PEER) && 578 !(ifp->if_flags & IFF_POINTOPOINT)) 579 continue; 580 if ((flags & PFI_AFLAG_NETWORK) && af == AF_INET6 && 581 IN6_IS_ADDR_LINKLOCAL( 582 &((struct sockaddr_in6 *)ia->ifa_addr)->sin6_addr)) 583 continue; 584 if (flags & PFI_AFLAG_NOALIAS) { 585 if (af == AF_INET && got4) 586 continue; 587 if (af == AF_INET6 && got6) 588 continue; 589 } 590 if (af == AF_INET) 591 got4 = 1; 592 else if (af == AF_INET6) 593 got6 = 1; 594 net2 = net; 595 if (net2 == 128 && (flags & PFI_AFLAG_NETWORK)) { 596 if (af == AF_INET) 597 net2 = pfi_unmask(&((struct sockaddr_in *) 598 ia->ifa_netmask)->sin_addr); 599 else if (af == AF_INET6) 600 net2 = pfi_unmask(&((struct sockaddr_in6 *) 601 ia->ifa_netmask)->sin6_addr); 602 } 603 if (af == AF_INET && net2 > 32) 604 net2 = 32; 605 if (flags & PFI_AFLAG_BROADCAST) 606 pfi_address_add(ia->ifa_broadaddr, af, net2); 607 else if (flags & PFI_AFLAG_PEER) 608 pfi_address_add(ia->ifa_dstaddr, af, net2); 609 else 610 pfi_address_add(ia->ifa_addr, af, net2); 611 } 612 } 613 614 void 615 pfi_address_add(struct sockaddr *sa, int af, int net) 616 { 617 struct pfr_addr *p; 618 int i; 619 620 if (pfi_buffer_cnt >= pfi_buffer_max) { 621 int new_max = pfi_buffer_max * 2; 622 623 if (new_max > PFI_BUFFER_MAX) { 624 kprintf("pfi_address_add: address buffer full (%d/%d)\n", 625 pfi_buffer_cnt, PFI_BUFFER_MAX); 626 return; 627 } 628 p = kmalloc(new_max * sizeof(*pfi_buffer), PFI_MTYPE, M_WAITOK); 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 kfree(aw->p.dyn, M_PFIADDRPL); 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_update_status(const char *name, struct pf_status *pfs) 701 { 702 struct pfi_kif *p; 703 struct pfi_kif_cmp key; 704 struct ifg_member p_member, *ifgm; 705 TAILQ_HEAD(, ifg_member) ifg_members; 706 int i, j, k; 707 708 strlcpy(key.pfik_ifname, name, sizeof(key.pfik_ifname)); 709 crit_enter(); 710 p = RB_FIND(pfi_ifhead, &pfi_ifs, (struct pfi_kif *)&key); 711 if (p == NULL) { 712 crit_exit(); 713 return; 714 } 715 if (p->pfik_group != NULL) { 716 bcopy(&p->pfik_group->ifg_members, &ifg_members, 717 sizeof(ifg_members)); 718 } else { 719 /* build a temporary list for p only */ 720 bzero(&p_member, sizeof(p_member)); 721 p_member.ifgm_ifp = p->pfik_ifp; 722 TAILQ_INIT(&ifg_members); 723 TAILQ_INSERT_TAIL(&ifg_members, &p_member, ifgm_next); 724 } 725 if (pfs) { 726 bzero(pfs->pcounters, sizeof(pfs->pcounters)); 727 bzero(pfs->bcounters, sizeof(pfs->bcounters)); 728 } 729 TAILQ_FOREACH(ifgm, &ifg_members, ifgm_next) { 730 if (ifgm->ifgm_ifp == NULL) 731 continue; 732 p = (struct pfi_kif *)ifgm->ifgm_ifp->if_pf_kif; 733 734 /* just clear statistics */ 735 if (pfs == NULL) { 736 bzero(p->pfik_packets, sizeof(p->pfik_packets)); 737 bzero(p->pfik_bytes, sizeof(p->pfik_bytes)); 738 p->pfik_tzero = time_second; 739 continue; 740 } 741 for (i = 0; i < 2; i++) 742 for (j = 0; j < 2; j++) 743 for (k = 0; k < 2; k++) { 744 pfs->pcounters[i][j][k] += 745 p->pfik_packets[i][j][k]; 746 pfs->bcounters[i][j] += 747 p->pfik_bytes[i][j][k]; 748 } 749 } 750 crit_exit(); 751 } 752 753 int 754 pfi_get_ifaces(const char *name, struct pfi_kif *buf, int *size) 755 { 756 struct pfi_kif *p, *nextp; 757 int n = 0; 758 759 crit_enter(); 760 for (p = RB_MIN(pfi_ifhead, &pfi_ifs); p; p = nextp) { 761 nextp = RB_NEXT(pfi_ifhead, &pfi_ifs, p); 762 if (pfi_skip_if(name, p)) 763 continue; 764 if (*size > n++) { 765 if (!p->pfik_tzero) 766 p->pfik_tzero = time_second; 767 pfi_kif_ref(p, PFI_KIF_REF_RULE); 768 if (copyout(p, buf++, sizeof(*buf))) { 769 pfi_kif_unref(p, PFI_KIF_REF_RULE); 770 crit_exit(); 771 return (EFAULT); 772 } 773 nextp = RB_NEXT(pfi_ifhead, &pfi_ifs, p); 774 pfi_kif_unref(p, PFI_KIF_REF_RULE); 775 } 776 } 777 crit_exit(); 778 *size = n; 779 return (0); 780 } 781 782 int 783 pfi_skip_if(const char *filter, struct pfi_kif *p) 784 { 785 int n; 786 787 if (filter == NULL || !*filter) 788 return (0); 789 if (!strcmp(p->pfik_name, filter)) 790 return (0); /* exact match */ 791 n = strlen(filter); 792 if (n < 1 || n >= IFNAMSIZ) 793 return (1); /* sanity check */ 794 if (filter[n-1] >= '0' && filter[n-1] <= '9') 795 return (1); /* only do exact match in that case */ 796 if (strncmp(p->pfik_name, filter, n)) 797 return (1); /* prefix doesn't match */ 798 return (p->pfik_name[n] < '0' || p->pfik_name[n] > '9'); 799 } 800 801 int 802 pfi_set_flags(const char *name, int flags) 803 { 804 struct pfi_kif *p; 805 806 crit_enter(); 807 RB_FOREACH(p, pfi_ifhead, &pfi_ifs) { 808 if (pfi_skip_if(name, p)) 809 continue; 810 p->pfik_flags |= flags; 811 } 812 crit_exit(); 813 return (0); 814 } 815 816 int 817 pfi_clear_flags(const char *name, int flags) 818 { 819 struct pfi_kif *p; 820 821 crit_enter(); 822 RB_FOREACH(p, pfi_ifhead, &pfi_ifs) { 823 if (pfi_skip_if(name, p)) 824 continue; 825 p->pfik_flags &= ~flags; 826 } 827 crit_exit(); 828 return (0); 829 } 830 831 /* from pf_print_state.c */ 832 int 833 pfi_unmask(void *addr) 834 { 835 struct pf_addr *m = addr; 836 int i = 31, j = 0, b = 0; 837 u_int32_t tmp; 838 839 while (j < 4 && m->addr32[j] == 0xffffffff) { 840 b += 32; 841 j++; 842 } 843 if (j < 4) { 844 tmp = ntohl(m->addr32[j]); 845 for (i = 31; tmp & (1 << i); --i) 846 b++; 847 } 848 return (b); 849 } 850 851