1 /* $OpenBSD: pf_if.c,v 1.96 2018/12/10 16:48:15 kn 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 <sys/param.h> 36 #include <sys/systm.h> 37 #include <sys/mbuf.h> 38 #include <sys/filio.h> 39 #include <sys/socket.h> 40 #include <sys/socketvar.h> 41 #include <sys/kernel.h> 42 #include <sys/device.h> 43 #include <sys/time.h> 44 #include <sys/pool.h> 45 #include <sys/syslog.h> 46 47 #include <net/if.h> 48 #include <net/if_var.h> 49 50 #include <netinet/in.h> 51 #include <netinet/ip.h> 52 #include <netinet/ip_var.h> 53 54 #include <net/pfvar.h> 55 56 #ifdef INET6 57 #include <netinet/ip6.h> 58 #endif /* INET6 */ 59 60 struct pfi_kif *pfi_all = NULL; 61 struct pool pfi_addr_pl; 62 struct pfi_ifhead pfi_ifs; 63 long pfi_update = 1; 64 struct pfr_addr *pfi_buffer; 65 int pfi_buffer_cnt; 66 int pfi_buffer_max; 67 68 void pfi_kif_update(struct pfi_kif *); 69 void pfi_dynaddr_update(struct pfi_dynaddr *dyn); 70 void pfi_table_update(struct pfr_ktable *, struct pfi_kif *, 71 u_int8_t, int); 72 void pfi_kifaddr_update(void *); 73 void pfi_instance_add(struct ifnet *, u_int8_t, int); 74 void pfi_address_add(struct sockaddr *, sa_family_t, u_int8_t); 75 int pfi_if_compare(struct pfi_kif *, struct pfi_kif *); 76 int pfi_skip_if(const char *, struct pfi_kif *); 77 int pfi_unmask(void *); 78 79 RB_PROTOTYPE(pfi_ifhead, pfi_kif, pfik_tree, pfi_if_compare); 80 RB_GENERATE(pfi_ifhead, pfi_kif, pfik_tree, pfi_if_compare); 81 82 #define PFI_BUFFER_MAX 0x10000 83 #define PFI_MTYPE M_IFADDR 84 85 void 86 pfi_initialize(void) 87 { 88 if (pfi_all != NULL) /* already initialized */ 89 return; 90 91 pool_init(&pfi_addr_pl, sizeof(struct pfi_dynaddr), 0, IPL_SOFTNET, 0, 92 "pfiaddrpl", NULL); 93 pfi_buffer_max = 64; 94 pfi_buffer = mallocarray(pfi_buffer_max, sizeof(*pfi_buffer), 95 PFI_MTYPE, M_WAITOK); 96 97 if ((pfi_all = pfi_kif_get(IFG_ALL)) == NULL) 98 panic("pfi_kif_get for pfi_all failed"); 99 } 100 101 struct pfi_kif * 102 pfi_kif_find(const char *kif_name) 103 { 104 struct pfi_kif_cmp s; 105 106 memset(&s, 0, sizeof(s)); 107 strlcpy(s.pfik_name, kif_name, sizeof(s.pfik_name)); 108 return (RB_FIND(pfi_ifhead, &pfi_ifs, (struct pfi_kif *)&s)); 109 } 110 111 struct pfi_kif * 112 pfi_kif_get(const char *kif_name) 113 { 114 struct pfi_kif *kif; 115 116 if ((kif = pfi_kif_find(kif_name))) 117 return (kif); 118 119 /* create new one */ 120 if ((kif = malloc(sizeof(*kif), PFI_MTYPE, M_NOWAIT|M_ZERO)) == NULL) 121 return (NULL); 122 123 strlcpy(kif->pfik_name, kif_name, sizeof(kif->pfik_name)); 124 kif->pfik_tzero = time_second; 125 TAILQ_INIT(&kif->pfik_dynaddrs); 126 127 if (!strcmp(kif->pfik_name, "any")) { 128 /* both so it works in the ioctl and the regular case */ 129 kif->pfik_flags |= PFI_IFLAG_ANY; 130 kif->pfik_flags_new |= PFI_IFLAG_ANY; 131 } 132 133 RB_INSERT(pfi_ifhead, &pfi_ifs, kif); 134 return (kif); 135 } 136 137 void 138 pfi_kif_ref(struct pfi_kif *kif, enum pfi_kif_refs what) 139 { 140 switch (what) { 141 case PFI_KIF_REF_RULE: 142 kif->pfik_rules++; 143 break; 144 case PFI_KIF_REF_STATE: 145 kif->pfik_states++; 146 break; 147 case PFI_KIF_REF_ROUTE: 148 kif->pfik_routes++; 149 break; 150 default: 151 panic("pfi_kif_ref with unknown type"); 152 } 153 } 154 155 void 156 pfi_kif_unref(struct pfi_kif *kif, enum pfi_kif_refs what) 157 { 158 if (kif == NULL) 159 return; 160 161 switch (what) { 162 case PFI_KIF_REF_NONE: 163 break; 164 case PFI_KIF_REF_RULE: 165 if (kif->pfik_rules <= 0) { 166 DPFPRINTF(LOG_ERR, 167 "pfi_kif_unref: rules refcount <= 0"); 168 return; 169 } 170 kif->pfik_rules--; 171 break; 172 case PFI_KIF_REF_STATE: 173 if (kif->pfik_states <= 0) { 174 DPFPRINTF(LOG_ERR, 175 "pfi_kif_unref: state refcount <= 0"); 176 return; 177 } 178 kif->pfik_states--; 179 break; 180 case PFI_KIF_REF_ROUTE: 181 if (kif->pfik_routes <= 0) { 182 DPFPRINTF(LOG_ERR, 183 "pfi_kif_unref: route refcount <= 0"); 184 return; 185 } 186 kif->pfik_routes--; 187 break; 188 default: 189 panic("pfi_kif_unref with unknown type"); 190 } 191 192 if (kif->pfik_ifp != NULL || kif->pfik_group != NULL || kif == pfi_all) 193 return; 194 195 if (kif->pfik_rules || kif->pfik_states || kif->pfik_routes) 196 return; 197 198 RB_REMOVE(pfi_ifhead, &pfi_ifs, kif); 199 free(kif, PFI_MTYPE, sizeof(*kif)); 200 } 201 202 int 203 pfi_kif_match(struct pfi_kif *rule_kif, struct pfi_kif *packet_kif) 204 { 205 struct ifg_list *p; 206 207 if (rule_kif == NULL || rule_kif == packet_kif) 208 return (1); 209 210 if (rule_kif->pfik_group != NULL) 211 TAILQ_FOREACH(p, &packet_kif->pfik_ifp->if_groups, ifgl_next) 212 if (p->ifgl_group == rule_kif->pfik_group) 213 return (1); 214 215 if (rule_kif->pfik_flags & PFI_IFLAG_ANY && packet_kif->pfik_ifp && 216 !(packet_kif->pfik_ifp->if_flags & IFF_LOOPBACK)) 217 return (1); 218 219 return (0); 220 } 221 222 void 223 pfi_attach_ifnet(struct ifnet *ifp) 224 { 225 struct pfi_kif *kif; 226 227 pfi_initialize(); 228 pfi_update++; 229 if ((kif = pfi_kif_get(ifp->if_xname)) == NULL) 230 panic("%s: pfi_kif_get failed", __func__); 231 232 kif->pfik_ifp = ifp; 233 ifp->if_pf_kif = (caddr_t)kif; 234 235 if ((kif->pfik_ah_cookie = hook_establish(ifp->if_addrhooks, 1, 236 pfi_kifaddr_update, kif)) == NULL) 237 panic("pfi_attach_ifnet: cannot allocate '%s' address hook", 238 ifp->if_xname); 239 240 pfi_kif_update(kif); 241 } 242 243 void 244 pfi_detach_ifnet(struct ifnet *ifp) 245 { 246 struct pfi_kif *kif; 247 248 if ((kif = (struct pfi_kif *)ifp->if_pf_kif) == NULL) 249 return; 250 251 pfi_update++; 252 hook_disestablish(ifp->if_addrhooks, kif->pfik_ah_cookie); 253 pfi_kif_update(kif); 254 255 kif->pfik_ifp = NULL; 256 ifp->if_pf_kif = NULL; 257 pfi_kif_unref(kif, PFI_KIF_REF_NONE); 258 } 259 260 void 261 pfi_attach_ifgroup(struct ifg_group *ifg) 262 { 263 struct pfi_kif *kif; 264 265 pfi_initialize(); 266 pfi_update++; 267 if ((kif = pfi_kif_get(ifg->ifg_group)) == NULL) 268 panic("%s: pfi_kif_get failed", __func__); 269 270 kif->pfik_group = ifg; 271 ifg->ifg_pf_kif = (caddr_t)kif; 272 } 273 274 void 275 pfi_detach_ifgroup(struct ifg_group *ifg) 276 { 277 struct pfi_kif *kif; 278 279 if ((kif = (struct pfi_kif *)ifg->ifg_pf_kif) == NULL) 280 return; 281 282 pfi_update++; 283 284 kif->pfik_group = NULL; 285 ifg->ifg_pf_kif = NULL; 286 pfi_kif_unref(kif, PFI_KIF_REF_NONE); 287 } 288 289 void 290 pfi_group_change(const char *group) 291 { 292 struct pfi_kif *kif; 293 294 pfi_update++; 295 if ((kif = pfi_kif_get(group)) == NULL) 296 panic("%s: pfi_kif_get failed", __func__); 297 298 pfi_kif_update(kif); 299 } 300 301 void 302 pfi_group_addmember(const char *group, struct ifnet *ifp) 303 { 304 struct pfi_kif *gkif, *ikif; 305 306 if ((gkif = pfi_kif_get(group)) == NULL || 307 (ikif = pfi_kif_get(ifp->if_xname)) == NULL) 308 panic("%s: pfi_kif_get failed", __func__); 309 ikif->pfik_flags |= gkif->pfik_flags; 310 311 pfi_group_change(group); 312 } 313 314 int 315 pfi_match_addr(struct pfi_dynaddr *dyn, struct pf_addr *a, sa_family_t af) 316 { 317 switch (af) { 318 case AF_INET: 319 switch (dyn->pfid_acnt4) { 320 case 0: 321 return (0); 322 case 1: 323 return (pf_match_addr(0, &dyn->pfid_addr4, 324 &dyn->pfid_mask4, a, AF_INET)); 325 default: 326 return (pfr_match_addr(dyn->pfid_kt, a, AF_INET)); 327 } 328 break; 329 #ifdef INET6 330 case AF_INET6: 331 switch (dyn->pfid_acnt6) { 332 case 0: 333 return (0); 334 case 1: 335 return (pf_match_addr(0, &dyn->pfid_addr6, 336 &dyn->pfid_mask6, a, AF_INET6)); 337 default: 338 return (pfr_match_addr(dyn->pfid_kt, a, AF_INET6)); 339 } 340 break; 341 #endif /* INET6 */ 342 default: 343 return (0); 344 } 345 } 346 347 int 348 pfi_dynaddr_setup(struct pf_addr_wrap *aw, sa_family_t af) 349 { 350 struct pfi_dynaddr *dyn; 351 char tblname[PF_TABLE_NAME_SIZE]; 352 struct pf_ruleset *ruleset = NULL; 353 int rv = 0; 354 355 if (aw->type != PF_ADDR_DYNIFTL) 356 return (0); 357 if ((dyn = pool_get(&pfi_addr_pl, PR_WAITOK | PR_LIMITFAIL | PR_ZERO)) 358 == NULL) 359 return (1); 360 361 if (!strcmp(aw->v.ifname, "self")) 362 dyn->pfid_kif = pfi_kif_get(IFG_ALL); 363 else 364 dyn->pfid_kif = pfi_kif_get(aw->v.ifname); 365 if (dyn->pfid_kif == NULL) { 366 rv = 1; 367 goto _bad; 368 } 369 pfi_kif_ref(dyn->pfid_kif, PFI_KIF_REF_RULE); 370 371 dyn->pfid_net = pfi_unmask(&aw->v.a.mask); 372 if (af == AF_INET && dyn->pfid_net == 32) 373 dyn->pfid_net = 128; 374 strlcpy(tblname, aw->v.ifname, sizeof(tblname)); 375 if (aw->iflags & PFI_AFLAG_NETWORK) 376 strlcat(tblname, ":network", sizeof(tblname)); 377 if (aw->iflags & PFI_AFLAG_BROADCAST) 378 strlcat(tblname, ":broadcast", sizeof(tblname)); 379 if (aw->iflags & PFI_AFLAG_PEER) 380 strlcat(tblname, ":peer", sizeof(tblname)); 381 if (aw->iflags & PFI_AFLAG_NOALIAS) 382 strlcat(tblname, ":0", sizeof(tblname)); 383 if (dyn->pfid_net != 128) 384 snprintf(tblname + strlen(tblname), 385 sizeof(tblname) - strlen(tblname), "/%d", dyn->pfid_net); 386 if ((ruleset = pf_find_or_create_ruleset(PF_RESERVED_ANCHOR)) == NULL) { 387 rv = 1; 388 goto _bad; 389 } 390 391 if ((dyn->pfid_kt = pfr_attach_table(ruleset, tblname, 1)) == NULL) { 392 rv = 1; 393 goto _bad; 394 } 395 396 dyn->pfid_kt->pfrkt_flags |= PFR_TFLAG_ACTIVE; 397 dyn->pfid_iflags = aw->iflags; 398 dyn->pfid_af = af; 399 400 TAILQ_INSERT_TAIL(&dyn->pfid_kif->pfik_dynaddrs, dyn, entry); 401 aw->p.dyn = dyn; 402 pfi_kif_update(dyn->pfid_kif); 403 return (0); 404 405 _bad: 406 if (dyn->pfid_kt != NULL) 407 pfr_detach_table(dyn->pfid_kt); 408 if (ruleset != NULL) 409 pf_remove_if_empty_ruleset(ruleset); 410 if (dyn->pfid_kif != NULL) 411 pfi_kif_unref(dyn->pfid_kif, PFI_KIF_REF_RULE); 412 pool_put(&pfi_addr_pl, dyn); 413 return (rv); 414 } 415 416 void 417 pfi_kif_update(struct pfi_kif *kif) 418 { 419 struct ifg_list *ifgl; 420 struct pfi_dynaddr *p; 421 422 /* update all dynaddr */ 423 TAILQ_FOREACH(p, &kif->pfik_dynaddrs, entry) 424 pfi_dynaddr_update(p); 425 426 /* again for all groups kif is member of */ 427 if (kif->pfik_ifp != NULL) 428 TAILQ_FOREACH(ifgl, &kif->pfik_ifp->if_groups, ifgl_next) 429 pfi_kif_update((struct pfi_kif *) 430 ifgl->ifgl_group->ifg_pf_kif); 431 } 432 433 void 434 pfi_dynaddr_update(struct pfi_dynaddr *dyn) 435 { 436 struct pfi_kif *kif; 437 struct pfr_ktable *kt; 438 439 if (dyn == NULL || dyn->pfid_kif == NULL || dyn->pfid_kt == NULL) 440 panic("pfi_dynaddr_update"); 441 442 kif = dyn->pfid_kif; 443 kt = dyn->pfid_kt; 444 445 if (kt->pfrkt_larg != pfi_update) { 446 /* this table needs to be brought up-to-date */ 447 pfi_table_update(kt, kif, dyn->pfid_net, dyn->pfid_iflags); 448 kt->pfrkt_larg = pfi_update; 449 } 450 pfr_dynaddr_update(kt, dyn); 451 } 452 453 void 454 pfi_table_update(struct pfr_ktable *kt, struct pfi_kif *kif, u_int8_t net, int flags) 455 { 456 int e, size2 = 0; 457 struct ifg_member *ifgm; 458 459 pfi_buffer_cnt = 0; 460 461 if (kif->pfik_ifp != NULL) 462 pfi_instance_add(kif->pfik_ifp, net, flags); 463 else if (kif->pfik_group != NULL) 464 TAILQ_FOREACH(ifgm, &kif->pfik_group->ifg_members, ifgm_next) 465 pfi_instance_add(ifgm->ifgm_ifp, net, flags); 466 467 if ((e = pfr_set_addrs(&kt->pfrkt_t, pfi_buffer, pfi_buffer_cnt, &size2, 468 NULL, NULL, NULL, 0, PFR_TFLAG_ALLMASK))) 469 DPFPRINTF(LOG_ERR, 470 "pfi_table_update: cannot set %d new addresses " 471 "into table %s: %d", pfi_buffer_cnt, kt->pfrkt_name, e); 472 } 473 474 void 475 pfi_instance_add(struct ifnet *ifp, u_int8_t net, int flags) 476 { 477 struct ifaddr *ifa; 478 int got4 = 0, got6 = 0; 479 int net2, af; 480 481 if (ifp == NULL) 482 return; 483 TAILQ_FOREACH(ifa, &ifp->if_addrlist, ifa_list) { 484 if (ifa->ifa_addr == NULL) 485 continue; 486 af = ifa->ifa_addr->sa_family; 487 if (af != AF_INET && af != AF_INET6) 488 continue; 489 if ((flags & PFI_AFLAG_BROADCAST) && af == AF_INET6) 490 continue; 491 if ((flags & PFI_AFLAG_BROADCAST) && 492 !(ifp->if_flags & IFF_BROADCAST)) 493 continue; 494 if ((flags & PFI_AFLAG_PEER) && 495 !(ifp->if_flags & IFF_POINTOPOINT)) 496 continue; 497 if ((flags & PFI_AFLAG_NETWORK) && af == AF_INET6 && 498 IN6_IS_ADDR_LINKLOCAL( 499 &((struct sockaddr_in6 *)ifa->ifa_addr)->sin6_addr)) 500 continue; 501 if (flags & PFI_AFLAG_NOALIAS) { 502 if (af == AF_INET && got4) 503 continue; 504 if (af == AF_INET6 && got6) 505 continue; 506 } 507 if (af == AF_INET) 508 got4 = 1; 509 else if (af == AF_INET6) 510 got6 = 1; 511 net2 = net; 512 if (net2 == 128 && (flags & PFI_AFLAG_NETWORK)) { 513 if (af == AF_INET) 514 net2 = pfi_unmask(&((struct sockaddr_in *) 515 ifa->ifa_netmask)->sin_addr); 516 else if (af == AF_INET6) 517 net2 = pfi_unmask(&((struct sockaddr_in6 *) 518 ifa->ifa_netmask)->sin6_addr); 519 } 520 if (af == AF_INET && net2 > 32) 521 net2 = 32; 522 if (flags & PFI_AFLAG_BROADCAST) 523 pfi_address_add(ifa->ifa_broadaddr, af, net2); 524 else if (flags & PFI_AFLAG_PEER) 525 pfi_address_add(ifa->ifa_dstaddr, af, net2); 526 else 527 pfi_address_add(ifa->ifa_addr, af, net2); 528 } 529 } 530 531 void 532 pfi_address_add(struct sockaddr *sa, sa_family_t af, u_int8_t net) 533 { 534 struct pfr_addr *p; 535 int i; 536 537 if (pfi_buffer_cnt >= pfi_buffer_max) { 538 int new_max = pfi_buffer_max * 2; 539 540 if (new_max > PFI_BUFFER_MAX) { 541 DPFPRINTF(LOG_ERR, 542 "pfi_address_add: address buffer full (%d/%d)", 543 pfi_buffer_cnt, PFI_BUFFER_MAX); 544 return; 545 } 546 p = mallocarray(new_max, sizeof(*pfi_buffer), PFI_MTYPE, 547 M_DONTWAIT); 548 if (p == NULL) { 549 DPFPRINTF(LOG_ERR, 550 "pfi_address_add: no memory to grow buffer " 551 "(%d/%d)", pfi_buffer_cnt, PFI_BUFFER_MAX); 552 return; 553 } 554 memcpy(p, pfi_buffer, pfi_buffer_max * sizeof(*pfi_buffer)); 555 /* no need to zero buffer */ 556 free(pfi_buffer, PFI_MTYPE, pfi_buffer_max * sizeof(*pfi_buffer)); 557 pfi_buffer = p; 558 pfi_buffer_max = new_max; 559 } 560 if (af == AF_INET && net > 32) 561 net = 128; 562 p = pfi_buffer + pfi_buffer_cnt++; 563 memset(p, 0, sizeof(*p)); 564 p->pfra_af = af; 565 p->pfra_net = net; 566 if (af == AF_INET) 567 p->pfra_ip4addr = ((struct sockaddr_in *)sa)->sin_addr; 568 else if (af == AF_INET6) { 569 p->pfra_ip6addr = ((struct sockaddr_in6 *)sa)->sin6_addr; 570 if (IN6_IS_SCOPE_EMBED(&p->pfra_ip6addr)) 571 p->pfra_ip6addr.s6_addr16[1] = 0; 572 } 573 /* mask network address bits */ 574 if (net < 128) 575 ((caddr_t)p)[p->pfra_net/8] &= ~(0xFF >> (p->pfra_net%8)); 576 for (i = (p->pfra_net+7)/8; i < sizeof(p->pfra_u); i++) 577 ((caddr_t)p)[i] = 0; 578 } 579 580 void 581 pfi_dynaddr_remove(struct pf_addr_wrap *aw) 582 { 583 if (aw->type != PF_ADDR_DYNIFTL || aw->p.dyn == NULL || 584 aw->p.dyn->pfid_kif == NULL || aw->p.dyn->pfid_kt == NULL) 585 return; 586 587 TAILQ_REMOVE(&aw->p.dyn->pfid_kif->pfik_dynaddrs, aw->p.dyn, entry); 588 pfi_kif_unref(aw->p.dyn->pfid_kif, PFI_KIF_REF_RULE); 589 aw->p.dyn->pfid_kif = NULL; 590 pfr_detach_table(aw->p.dyn->pfid_kt); 591 aw->p.dyn->pfid_kt = NULL; 592 pool_put(&pfi_addr_pl, aw->p.dyn); 593 aw->p.dyn = NULL; 594 } 595 596 void 597 pfi_dynaddr_copyout(struct pf_addr_wrap *aw) 598 { 599 if (aw->type != PF_ADDR_DYNIFTL || aw->p.dyn == NULL || 600 aw->p.dyn->pfid_kif == NULL) 601 return; 602 aw->p.dyncnt = aw->p.dyn->pfid_acnt4 + aw->p.dyn->pfid_acnt6; 603 } 604 605 void 606 pfi_kifaddr_update(void *v) 607 { 608 struct pfi_kif *kif = (struct pfi_kif *)v; 609 610 NET_ASSERT_LOCKED(); 611 612 pfi_update++; 613 pfi_kif_update(kif); 614 } 615 616 int 617 pfi_if_compare(struct pfi_kif *p, struct pfi_kif *q) 618 { 619 return (strncmp(p->pfik_name, q->pfik_name, IFNAMSIZ)); 620 } 621 622 void 623 pfi_update_status(const char *name, struct pf_status *pfs) 624 { 625 struct pfi_kif *p; 626 struct pfi_kif_cmp key; 627 struct ifg_member p_member, *ifgm; 628 TAILQ_HEAD(, ifg_member) ifg_members; 629 int i, j, k; 630 631 if (*name == '\0' && pfs == NULL) { 632 RB_FOREACH(p, pfi_ifhead, &pfi_ifs) { 633 memset(p->pfik_packets, 0, sizeof(p->pfik_packets)); 634 memset(p->pfik_bytes, 0, sizeof(p->pfik_bytes)); 635 p->pfik_tzero = time_second; 636 } 637 return; 638 } 639 640 strlcpy(key.pfik_name, name, sizeof(key.pfik_name)); 641 p = RB_FIND(pfi_ifhead, &pfi_ifs, (struct pfi_kif *)&key); 642 if (p == NULL) { 643 return; 644 } 645 if (p->pfik_group != NULL) { 646 memcpy(&ifg_members, &p->pfik_group->ifg_members, 647 sizeof(ifg_members)); 648 } else { 649 /* build a temporary list for p only */ 650 memset(&p_member, 0, sizeof(p_member)); 651 p_member.ifgm_ifp = p->pfik_ifp; 652 TAILQ_INIT(&ifg_members); 653 TAILQ_INSERT_TAIL(&ifg_members, &p_member, ifgm_next); 654 } 655 if (pfs) { 656 memset(pfs->pcounters, 0, sizeof(pfs->pcounters)); 657 memset(pfs->bcounters, 0, sizeof(pfs->bcounters)); 658 } 659 TAILQ_FOREACH(ifgm, &ifg_members, ifgm_next) { 660 if (ifgm->ifgm_ifp == NULL) 661 continue; 662 p = (struct pfi_kif *)ifgm->ifgm_ifp->if_pf_kif; 663 664 /* just clear statistics */ 665 if (pfs == NULL) { 666 memset(p->pfik_packets, 0, sizeof(p->pfik_packets)); 667 memset(p->pfik_bytes, 0, sizeof(p->pfik_bytes)); 668 p->pfik_tzero = time_second; 669 continue; 670 } 671 for (i = 0; i < 2; i++) 672 for (j = 0; j < 2; j++) 673 for (k = 0; k < 2; k++) { 674 pfs->pcounters[i][j][k] += 675 p->pfik_packets[i][j][k]; 676 pfs->bcounters[i][j] += 677 p->pfik_bytes[i][j][k]; 678 } 679 } 680 } 681 682 int 683 pfi_get_ifaces(const char *name, struct pfi_kif *buf, int *size) 684 { 685 struct pfi_kif *p, *nextp; 686 int n = 0; 687 688 for (p = RB_MIN(pfi_ifhead, &pfi_ifs); p; p = nextp) { 689 nextp = RB_NEXT(pfi_ifhead, &pfi_ifs, p); 690 if (pfi_skip_if(name, p)) 691 continue; 692 if (*size > n++) { 693 if (!p->pfik_tzero) 694 p->pfik_tzero = time_second; 695 pfi_kif_ref(p, PFI_KIF_REF_RULE); 696 if (copyout(p, buf++, sizeof(*buf))) { 697 pfi_kif_unref(p, PFI_KIF_REF_RULE); 698 return (EFAULT); 699 } 700 nextp = RB_NEXT(pfi_ifhead, &pfi_ifs, p); 701 pfi_kif_unref(p, PFI_KIF_REF_RULE); 702 } 703 } 704 *size = n; 705 return (0); 706 } 707 708 int 709 pfi_skip_if(const char *filter, struct pfi_kif *p) 710 { 711 struct ifg_list *i; 712 int n; 713 714 if (filter == NULL || !*filter) 715 return (0); 716 if (!strcmp(p->pfik_name, filter)) 717 return (0); /* exact match */ 718 n = strlen(filter); 719 if (n < 1 || n >= IFNAMSIZ) 720 return (1); /* sanity check */ 721 if (filter[n-1] >= '0' && filter[n-1] <= '9') 722 return (1); /* group names may not end in a digit */ 723 if (p->pfik_ifp != NULL) 724 TAILQ_FOREACH(i, &p->pfik_ifp->if_groups, ifgl_next) 725 if (!strncmp(i->ifgl_group->ifg_group, filter, IFNAMSIZ)) 726 return (0); /* iface is in group "filter" */ 727 return (1); 728 } 729 730 int 731 pfi_set_flags(const char *name, int flags) 732 { 733 struct pfi_kif *p; 734 735 RB_FOREACH(p, pfi_ifhead, &pfi_ifs) { 736 if (pfi_skip_if(name, p)) 737 continue; 738 p->pfik_flags_new = p->pfik_flags | flags; 739 } 740 return (0); 741 } 742 743 int 744 pfi_clear_flags(const char *name, int flags) 745 { 746 struct pfi_kif *p; 747 748 RB_FOREACH(p, pfi_ifhead, &pfi_ifs) { 749 if (pfi_skip_if(name, p)) 750 continue; 751 p->pfik_flags_new = p->pfik_flags & ~flags; 752 } 753 return (0); 754 } 755 756 void 757 pfi_xcommit(void) 758 { 759 struct pfi_kif *p; 760 761 RB_FOREACH(p, pfi_ifhead, &pfi_ifs) 762 p->pfik_flags = p->pfik_flags_new; 763 } 764 765 /* from pf_print_state.c */ 766 int 767 pfi_unmask(void *addr) 768 { 769 struct pf_addr *m = addr; 770 int i = 31, j = 0, b = 0; 771 u_int32_t tmp; 772 773 while (j < 4 && m->addr32[j] == 0xffffffff) { 774 b += 32; 775 j++; 776 } 777 if (j < 4) { 778 tmp = ntohl(m->addr32[j]); 779 for (i = 31; tmp & (1 << i); --i) 780 b++; 781 } 782 return (b); 783 } 784 785