1 /* $OpenBSD: pf_if.c,v 1.82 2015/11/20 03:35:23 dlg 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, 0, 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 bzero(&s, 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: state 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, 0); 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 int s; 227 228 pfi_initialize(); 229 s = splsoftnet(); 230 pfi_update++; 231 if ((kif = pfi_kif_get(ifp->if_xname)) == NULL) 232 panic("pfi_kif_get failed"); 233 234 kif->pfik_ifp = ifp; 235 ifp->if_pf_kif = (caddr_t)kif; 236 237 if ((kif->pfik_ah_cookie = hook_establish(ifp->if_addrhooks, 1, 238 pfi_kifaddr_update, kif)) == NULL) 239 panic("pfi_attach_ifnet: cannot allocate '%s' address hook", 240 ifp->if_xname); 241 242 pfi_kif_update(kif); 243 244 splx(s); 245 } 246 247 void 248 pfi_detach_ifnet(struct ifnet *ifp) 249 { 250 int s; 251 struct pfi_kif *kif; 252 253 if ((kif = (struct pfi_kif *)ifp->if_pf_kif) == NULL) 254 return; 255 256 s = splsoftnet(); 257 pfi_update++; 258 hook_disestablish(ifp->if_addrhooks, kif->pfik_ah_cookie); 259 pfi_kif_update(kif); 260 261 kif->pfik_ifp = NULL; 262 ifp->if_pf_kif = NULL; 263 pfi_kif_unref(kif, PFI_KIF_REF_NONE); 264 265 splx(s); 266 } 267 268 void 269 pfi_attach_ifgroup(struct ifg_group *ifg) 270 { 271 struct pfi_kif *kif; 272 int s; 273 274 pfi_initialize(); 275 s = splsoftnet(); 276 pfi_update++; 277 if ((kif = pfi_kif_get(ifg->ifg_group)) == NULL) 278 panic("pfi_kif_get failed"); 279 280 kif->pfik_group = ifg; 281 ifg->ifg_pf_kif = (caddr_t)kif; 282 283 splx(s); 284 } 285 286 void 287 pfi_detach_ifgroup(struct ifg_group *ifg) 288 { 289 int s; 290 struct pfi_kif *kif; 291 292 if ((kif = (struct pfi_kif *)ifg->ifg_pf_kif) == NULL) 293 return; 294 295 s = splsoftnet(); 296 pfi_update++; 297 298 kif->pfik_group = NULL; 299 ifg->ifg_pf_kif = NULL; 300 pfi_kif_unref(kif, PFI_KIF_REF_NONE); 301 splx(s); 302 } 303 304 void 305 pfi_group_change(const char *group) 306 { 307 struct pfi_kif *kif; 308 int s; 309 310 s = splsoftnet(); 311 pfi_update++; 312 if ((kif = pfi_kif_get(group)) == NULL) 313 panic("pfi_kif_get failed"); 314 315 pfi_kif_update(kif); 316 317 splx(s); 318 } 319 320 int 321 pfi_match_addr(struct pfi_dynaddr *dyn, struct pf_addr *a, sa_family_t af) 322 { 323 switch (af) { 324 case AF_INET: 325 switch (dyn->pfid_acnt4) { 326 case 0: 327 return (0); 328 case 1: 329 return (PF_MATCHA(0, &dyn->pfid_addr4, 330 &dyn->pfid_mask4, a, AF_INET)); 331 default: 332 return (pfr_match_addr(dyn->pfid_kt, a, AF_INET)); 333 } 334 break; 335 #ifdef INET6 336 case AF_INET6: 337 switch (dyn->pfid_acnt6) { 338 case 0: 339 return (0); 340 case 1: 341 return (PF_MATCHA(0, &dyn->pfid_addr6, 342 &dyn->pfid_mask6, a, AF_INET6)); 343 default: 344 return (pfr_match_addr(dyn->pfid_kt, a, AF_INET6)); 345 } 346 break; 347 #endif /* INET6 */ 348 default: 349 return (0); 350 } 351 } 352 353 int 354 pfi_dynaddr_setup(struct pf_addr_wrap *aw, sa_family_t af) 355 { 356 struct pfi_dynaddr *dyn; 357 char tblname[PF_TABLE_NAME_SIZE]; 358 struct pf_ruleset *ruleset = NULL; 359 int s, rv = 0; 360 361 if (aw->type != PF_ADDR_DYNIFTL) 362 return (0); 363 if ((dyn = pool_get(&pfi_addr_pl, PR_WAITOK | PR_LIMITFAIL | PR_ZERO)) 364 == NULL) 365 return (1); 366 367 s = splsoftnet(); 368 if (!strcmp(aw->v.ifname, "self")) 369 dyn->pfid_kif = pfi_kif_get(IFG_ALL); 370 else 371 dyn->pfid_kif = pfi_kif_get(aw->v.ifname); 372 if (dyn->pfid_kif == NULL) { 373 rv = 1; 374 goto _bad; 375 } 376 pfi_kif_ref(dyn->pfid_kif, PFI_KIF_REF_RULE); 377 378 dyn->pfid_net = pfi_unmask(&aw->v.a.mask); 379 if (af == AF_INET && dyn->pfid_net == 32) 380 dyn->pfid_net = 128; 381 strlcpy(tblname, aw->v.ifname, sizeof(tblname)); 382 if (aw->iflags & PFI_AFLAG_NETWORK) 383 strlcat(tblname, ":network", sizeof(tblname)); 384 if (aw->iflags & PFI_AFLAG_BROADCAST) 385 strlcat(tblname, ":broadcast", sizeof(tblname)); 386 if (aw->iflags & PFI_AFLAG_PEER) 387 strlcat(tblname, ":peer", sizeof(tblname)); 388 if (aw->iflags & PFI_AFLAG_NOALIAS) 389 strlcat(tblname, ":0", sizeof(tblname)); 390 if (dyn->pfid_net != 128) 391 snprintf(tblname + strlen(tblname), 392 sizeof(tblname) - strlen(tblname), "/%d", dyn->pfid_net); 393 if ((ruleset = pf_find_or_create_ruleset(PF_RESERVED_ANCHOR)) == NULL) { 394 rv = 1; 395 goto _bad; 396 } 397 398 if ((dyn->pfid_kt = pfr_attach_table(ruleset, tblname, 1)) == NULL) { 399 rv = 1; 400 goto _bad; 401 } 402 403 dyn->pfid_kt->pfrkt_flags |= PFR_TFLAG_ACTIVE; 404 dyn->pfid_iflags = aw->iflags; 405 dyn->pfid_af = af; 406 407 TAILQ_INSERT_TAIL(&dyn->pfid_kif->pfik_dynaddrs, dyn, entry); 408 aw->p.dyn = dyn; 409 pfi_kif_update(dyn->pfid_kif); 410 splx(s); 411 return (0); 412 413 _bad: 414 if (dyn->pfid_kt != NULL) 415 pfr_detach_table(dyn->pfid_kt); 416 if (ruleset != NULL) 417 pf_remove_if_empty_ruleset(ruleset); 418 if (dyn->pfid_kif != NULL) 419 pfi_kif_unref(dyn->pfid_kif, PFI_KIF_REF_RULE); 420 pool_put(&pfi_addr_pl, dyn); 421 splx(s); 422 return (rv); 423 } 424 425 void 426 pfi_kif_update(struct pfi_kif *kif) 427 { 428 struct ifg_list *ifgl; 429 struct pfi_dynaddr *p; 430 431 /* update all dynaddr */ 432 TAILQ_FOREACH(p, &kif->pfik_dynaddrs, entry) 433 pfi_dynaddr_update(p); 434 435 /* again for all groups kif is member of */ 436 if (kif->pfik_ifp != NULL) 437 TAILQ_FOREACH(ifgl, &kif->pfik_ifp->if_groups, ifgl_next) 438 pfi_kif_update((struct pfi_kif *) 439 ifgl->ifgl_group->ifg_pf_kif); 440 } 441 442 void 443 pfi_dynaddr_update(struct pfi_dynaddr *dyn) 444 { 445 struct pfi_kif *kif; 446 struct pfr_ktable *kt; 447 448 if (dyn == NULL || dyn->pfid_kif == NULL || dyn->pfid_kt == NULL) 449 panic("pfi_dynaddr_update"); 450 451 kif = dyn->pfid_kif; 452 kt = dyn->pfid_kt; 453 454 if (kt->pfrkt_larg != pfi_update) { 455 /* this table needs to be brought up-to-date */ 456 pfi_table_update(kt, kif, dyn->pfid_net, dyn->pfid_iflags); 457 kt->pfrkt_larg = pfi_update; 458 } 459 pfr_dynaddr_update(kt, dyn); 460 } 461 462 void 463 pfi_table_update(struct pfr_ktable *kt, struct pfi_kif *kif, u_int8_t net, int flags) 464 { 465 int e, size2 = 0; 466 struct ifg_member *ifgm; 467 468 pfi_buffer_cnt = 0; 469 470 if (kif->pfik_ifp != NULL) 471 pfi_instance_add(kif->pfik_ifp, net, flags); 472 else if (kif->pfik_group != NULL) 473 TAILQ_FOREACH(ifgm, &kif->pfik_group->ifg_members, ifgm_next) 474 pfi_instance_add(ifgm->ifgm_ifp, net, flags); 475 476 if ((e = pfr_set_addrs(&kt->pfrkt_t, pfi_buffer, pfi_buffer_cnt, &size2, 477 NULL, NULL, NULL, 0, PFR_TFLAG_ALLMASK))) 478 DPFPRINTF(LOG_ERR, 479 "pfi_table_update: cannot set %d new addresses " 480 "into table %s: %d", pfi_buffer_cnt, kt->pfrkt_name, e); 481 } 482 483 void 484 pfi_instance_add(struct ifnet *ifp, u_int8_t net, int flags) 485 { 486 struct ifaddr *ifa; 487 int got4 = 0, got6 = 0; 488 int net2, af; 489 490 if (ifp == NULL) 491 return; 492 TAILQ_FOREACH(ifa, &ifp->if_addrlist, ifa_list) { 493 if (ifa->ifa_addr == NULL) 494 continue; 495 af = ifa->ifa_addr->sa_family; 496 if (af != AF_INET && af != AF_INET6) 497 continue; 498 if ((flags & PFI_AFLAG_BROADCAST) && af == AF_INET6) 499 continue; 500 if ((flags & PFI_AFLAG_BROADCAST) && 501 !(ifp->if_flags & IFF_BROADCAST)) 502 continue; 503 if ((flags & PFI_AFLAG_PEER) && 504 !(ifp->if_flags & IFF_POINTOPOINT)) 505 continue; 506 if ((flags & PFI_AFLAG_NETWORK) && af == AF_INET6 && 507 IN6_IS_ADDR_LINKLOCAL( 508 &((struct sockaddr_in6 *)ifa->ifa_addr)->sin6_addr)) 509 continue; 510 if (flags & PFI_AFLAG_NOALIAS) { 511 if (af == AF_INET && got4) 512 continue; 513 if (af == AF_INET6 && got6) 514 continue; 515 } 516 if (af == AF_INET) 517 got4 = 1; 518 else if (af == AF_INET6) 519 got6 = 1; 520 net2 = net; 521 if (net2 == 128 && (flags & PFI_AFLAG_NETWORK)) { 522 if (af == AF_INET) 523 net2 = pfi_unmask(&((struct sockaddr_in *) 524 ifa->ifa_netmask)->sin_addr); 525 else if (af == AF_INET6) 526 net2 = pfi_unmask(&((struct sockaddr_in6 *) 527 ifa->ifa_netmask)->sin6_addr); 528 } 529 if (af == AF_INET && net2 > 32) 530 net2 = 32; 531 if (flags & PFI_AFLAG_BROADCAST) 532 pfi_address_add(ifa->ifa_broadaddr, af, net2); 533 else if (flags & PFI_AFLAG_PEER) 534 pfi_address_add(ifa->ifa_dstaddr, af, net2); 535 else 536 pfi_address_add(ifa->ifa_addr, af, net2); 537 } 538 } 539 540 void 541 pfi_address_add(struct sockaddr *sa, sa_family_t af, u_int8_t net) 542 { 543 struct pfr_addr *p; 544 int i; 545 546 if (pfi_buffer_cnt >= pfi_buffer_max) { 547 int new_max = pfi_buffer_max * 2; 548 549 if (new_max > PFI_BUFFER_MAX) { 550 DPFPRINTF(LOG_ERR, 551 "pfi_address_add: address buffer full (%d/%d)", 552 pfi_buffer_cnt, PFI_BUFFER_MAX); 553 return; 554 } 555 p = mallocarray(new_max, sizeof(*pfi_buffer), PFI_MTYPE, 556 M_DONTWAIT); 557 if (p == NULL) { 558 DPFPRINTF(LOG_ERR, 559 "pfi_address_add: no memory to grow buffer " 560 "(%d/%d)", pfi_buffer_cnt, PFI_BUFFER_MAX); 561 return; 562 } 563 memcpy(p, pfi_buffer, pfi_buffer_max * sizeof(*pfi_buffer)); 564 /* no need to zero buffer */ 565 free(pfi_buffer, PFI_MTYPE, 0); 566 pfi_buffer = p; 567 pfi_buffer_max = new_max; 568 } 569 if (af == AF_INET && net > 32) 570 net = 128; 571 p = pfi_buffer + pfi_buffer_cnt++; 572 bzero(p, sizeof(*p)); 573 p->pfra_af = af; 574 p->pfra_net = net; 575 if (af == AF_INET) 576 p->pfra_ip4addr = ((struct sockaddr_in *)sa)->sin_addr; 577 else if (af == AF_INET6) { 578 p->pfra_ip6addr = ((struct sockaddr_in6 *)sa)->sin6_addr; 579 if (IN6_IS_SCOPE_EMBED(&p->pfra_ip6addr)) 580 p->pfra_ip6addr.s6_addr16[1] = 0; 581 } 582 /* mask network address bits */ 583 if (net < 128) 584 ((caddr_t)p)[p->pfra_net/8] &= ~(0xFF >> (p->pfra_net%8)); 585 for (i = (p->pfra_net+7)/8; i < sizeof(p->pfra_u); i++) 586 ((caddr_t)p)[i] = 0; 587 } 588 589 void 590 pfi_dynaddr_remove(struct pf_addr_wrap *aw) 591 { 592 int s; 593 594 if (aw->type != PF_ADDR_DYNIFTL || aw->p.dyn == NULL || 595 aw->p.dyn->pfid_kif == NULL || aw->p.dyn->pfid_kt == NULL) 596 return; 597 598 s = splsoftnet(); 599 TAILQ_REMOVE(&aw->p.dyn->pfid_kif->pfik_dynaddrs, aw->p.dyn, entry); 600 pfi_kif_unref(aw->p.dyn->pfid_kif, PFI_KIF_REF_RULE); 601 aw->p.dyn->pfid_kif = NULL; 602 pfr_detach_table(aw->p.dyn->pfid_kt); 603 aw->p.dyn->pfid_kt = NULL; 604 pool_put(&pfi_addr_pl, aw->p.dyn); 605 aw->p.dyn = NULL; 606 splx(s); 607 } 608 609 void 610 pfi_dynaddr_copyout(struct pf_addr_wrap *aw) 611 { 612 if (aw->type != PF_ADDR_DYNIFTL || aw->p.dyn == NULL || 613 aw->p.dyn->pfid_kif == NULL) 614 return; 615 aw->p.dyncnt = aw->p.dyn->pfid_acnt4 + aw->p.dyn->pfid_acnt6; 616 } 617 618 void 619 pfi_kifaddr_update(void *v) 620 { 621 int s; 622 struct pfi_kif *kif = (struct pfi_kif *)v; 623 624 s = splsoftnet(); 625 pfi_update++; 626 pfi_kif_update(kif); 627 splx(s); 628 } 629 630 int 631 pfi_if_compare(struct pfi_kif *p, struct pfi_kif *q) 632 { 633 return (strncmp(p->pfik_name, q->pfik_name, IFNAMSIZ)); 634 } 635 636 void 637 pfi_update_status(const char *name, struct pf_status *pfs) 638 { 639 struct pfi_kif *p; 640 struct pfi_kif_cmp key; 641 struct ifg_member p_member, *ifgm; 642 TAILQ_HEAD(, ifg_member) ifg_members; 643 int i, j, k, s; 644 645 s = splsoftnet(); 646 if (*name == '\0' && pfs == NULL) { 647 RB_FOREACH(p, pfi_ifhead, &pfi_ifs) { 648 bzero(p->pfik_packets, sizeof(p->pfik_packets)); 649 bzero(p->pfik_bytes, sizeof(p->pfik_bytes)); 650 p->pfik_tzero = time_second; 651 } 652 splx(s); 653 return; 654 } 655 656 strlcpy(key.pfik_name, name, sizeof(key.pfik_name)); 657 p = RB_FIND(pfi_ifhead, &pfi_ifs, (struct pfi_kif *)&key); 658 if (p == NULL) { 659 splx(s); 660 return; 661 } 662 if (p->pfik_group != NULL) { 663 memcpy(&ifg_members, &p->pfik_group->ifg_members, 664 sizeof(ifg_members)); 665 } else { 666 /* build a temporary list for p only */ 667 bzero(&p_member, sizeof(p_member)); 668 p_member.ifgm_ifp = p->pfik_ifp; 669 TAILQ_INIT(&ifg_members); 670 TAILQ_INSERT_TAIL(&ifg_members, &p_member, ifgm_next); 671 } 672 if (pfs) { 673 bzero(pfs->pcounters, sizeof(pfs->pcounters)); 674 bzero(pfs->bcounters, sizeof(pfs->bcounters)); 675 } 676 TAILQ_FOREACH(ifgm, &ifg_members, ifgm_next) { 677 if (ifgm->ifgm_ifp == NULL) 678 continue; 679 p = (struct pfi_kif *)ifgm->ifgm_ifp->if_pf_kif; 680 681 /* just clear statistics */ 682 if (pfs == NULL) { 683 bzero(p->pfik_packets, sizeof(p->pfik_packets)); 684 bzero(p->pfik_bytes, sizeof(p->pfik_bytes)); 685 p->pfik_tzero = time_second; 686 continue; 687 } 688 for (i = 0; i < 2; i++) 689 for (j = 0; j < 2; j++) 690 for (k = 0; k < 2; k++) { 691 pfs->pcounters[i][j][k] += 692 p->pfik_packets[i][j][k]; 693 pfs->bcounters[i][j] += 694 p->pfik_bytes[i][j][k]; 695 } 696 } 697 splx(s); 698 } 699 700 int 701 pfi_get_ifaces(const char *name, struct pfi_kif *buf, int *size) 702 { 703 struct pfi_kif *p, *nextp; 704 int s, n = 0; 705 706 s = splsoftnet(); 707 for (p = RB_MIN(pfi_ifhead, &pfi_ifs); p; p = nextp) { 708 nextp = RB_NEXT(pfi_ifhead, &pfi_ifs, p); 709 if (pfi_skip_if(name, p)) 710 continue; 711 if (*size > n++) { 712 if (!p->pfik_tzero) 713 p->pfik_tzero = time_second; 714 pfi_kif_ref(p, PFI_KIF_REF_RULE); 715 if (copyout(p, buf++, sizeof(*buf))) { 716 pfi_kif_unref(p, PFI_KIF_REF_RULE); 717 splx(s); 718 return (EFAULT); 719 } 720 nextp = RB_NEXT(pfi_ifhead, &pfi_ifs, p); 721 pfi_kif_unref(p, PFI_KIF_REF_RULE); 722 } 723 } 724 splx(s); 725 *size = n; 726 return (0); 727 } 728 729 int 730 pfi_skip_if(const char *filter, struct pfi_kif *p) 731 { 732 struct ifg_list *i; 733 int n; 734 735 if (filter == NULL || !*filter) 736 return (0); 737 if (!strcmp(p->pfik_name, filter)) 738 return (0); /* exact match */ 739 n = strlen(filter); 740 if (n < 1 || n >= IFNAMSIZ) 741 return (1); /* sanity check */ 742 if (filter[n-1] >= '0' && filter[n-1] <= '9') 743 return (1); /* group names may not end in a digit */ 744 if (p->pfik_ifp != NULL) 745 TAILQ_FOREACH(i, &p->pfik_ifp->if_groups, ifgl_next) 746 if (!strncmp(i->ifgl_group->ifg_group, filter, IFNAMSIZ)) 747 return (0); /* iface is in group "filter" */ 748 return (1); 749 } 750 751 int 752 pfi_set_flags(const char *name, int flags) 753 { 754 struct pfi_kif *p; 755 int s; 756 757 s = splsoftnet(); 758 RB_FOREACH(p, pfi_ifhead, &pfi_ifs) { 759 if (pfi_skip_if(name, p)) 760 continue; 761 p->pfik_flags_new = p->pfik_flags | flags; 762 } 763 splx(s); 764 return (0); 765 } 766 767 int 768 pfi_clear_flags(const char *name, int flags) 769 { 770 struct pfi_kif *p; 771 int s; 772 773 s = splsoftnet(); 774 RB_FOREACH(p, pfi_ifhead, &pfi_ifs) { 775 if (pfi_skip_if(name, p)) 776 continue; 777 p->pfik_flags_new = p->pfik_flags & ~flags; 778 } 779 splx(s); 780 return (0); 781 } 782 783 void 784 pfi_xcommit(void) 785 { 786 struct pfi_kif *p; 787 int s; 788 789 s = splsoftnet(); 790 RB_FOREACH(p, pfi_ifhead, &pfi_ifs) 791 p->pfik_flags = p->pfik_flags_new; 792 splx(s); 793 } 794 795 /* from pf_print_state.c */ 796 int 797 pfi_unmask(void *addr) 798 { 799 struct pf_addr *m = addr; 800 int i = 31, j = 0, b = 0; 801 u_int32_t tmp; 802 803 while (j < 4 && m->addr32[j] == 0xffffffff) { 804 b += 32; 805 j++; 806 } 807 if (j < 4) { 808 tmp = ntohl(m->addr32[j]); 809 for (i = 31; tmp & (1 << i); --i) 810 b++; 811 } 812 return (b); 813 } 814 815