1 /* $OpenBSD: pfctl_parser.c,v 1.240 2008/06/10 20:55:02 mcbride Exp $ */ 2 3 /*- 4 * SPDX-License-Identifier: BSD-2-Clause 5 * 6 * Copyright (c) 2001 Daniel Hartmeier 7 * Copyright (c) 2002,2003 Henning Brauer 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 36 #include <sys/cdefs.h> 37 __FBSDID("$FreeBSD$"); 38 39 #include <sys/types.h> 40 #include <sys/ioctl.h> 41 #include <sys/socket.h> 42 #include <sys/param.h> 43 #include <sys/proc.h> 44 #include <net/if.h> 45 #include <netinet/in.h> 46 #include <netinet/in_systm.h> 47 #include <netinet/ip.h> 48 #include <netinet/ip_icmp.h> 49 #include <netinet/icmp6.h> 50 #include <net/pfvar.h> 51 #include <arpa/inet.h> 52 53 #include <search.h> 54 #include <stdio.h> 55 #include <stdlib.h> 56 #include <string.h> 57 #include <ctype.h> 58 #include <netdb.h> 59 #include <stdarg.h> 60 #include <errno.h> 61 #include <err.h> 62 #include <ifaddrs.h> 63 #include <unistd.h> 64 65 #include "pfctl_parser.h" 66 #include "pfctl.h" 67 68 void print_op (u_int8_t, const char *, const char *); 69 void print_port (u_int8_t, u_int16_t, u_int16_t, const char *, int); 70 void print_ugid (u_int8_t, unsigned, unsigned, const char *, unsigned); 71 void print_flags (u_int8_t); 72 void print_fromto(struct pf_rule_addr *, pf_osfp_t, 73 struct pf_rule_addr *, u_int8_t, u_int8_t, int, int); 74 int ifa_skip_if(const char *filter, struct node_host *p); 75 76 struct node_host *host_if(const char *, int); 77 struct node_host *host_v4(const char *, int); 78 struct node_host *host_v6(const char *, int); 79 struct node_host *host_dns(const char *, int, int); 80 81 const char * const tcpflags = "FSRPAUEW"; 82 83 static const struct icmptypeent icmp_type[] = { 84 { "echoreq", ICMP_ECHO }, 85 { "echorep", ICMP_ECHOREPLY }, 86 { "unreach", ICMP_UNREACH }, 87 { "squench", ICMP_SOURCEQUENCH }, 88 { "redir", ICMP_REDIRECT }, 89 { "althost", ICMP_ALTHOSTADDR }, 90 { "routeradv", ICMP_ROUTERADVERT }, 91 { "routersol", ICMP_ROUTERSOLICIT }, 92 { "timex", ICMP_TIMXCEED }, 93 { "paramprob", ICMP_PARAMPROB }, 94 { "timereq", ICMP_TSTAMP }, 95 { "timerep", ICMP_TSTAMPREPLY }, 96 { "inforeq", ICMP_IREQ }, 97 { "inforep", ICMP_IREQREPLY }, 98 { "maskreq", ICMP_MASKREQ }, 99 { "maskrep", ICMP_MASKREPLY }, 100 { "trace", ICMP_TRACEROUTE }, 101 { "dataconv", ICMP_DATACONVERR }, 102 { "mobredir", ICMP_MOBILE_REDIRECT }, 103 { "ipv6-where", ICMP_IPV6_WHEREAREYOU }, 104 { "ipv6-here", ICMP_IPV6_IAMHERE }, 105 { "mobregreq", ICMP_MOBILE_REGREQUEST }, 106 { "mobregrep", ICMP_MOBILE_REGREPLY }, 107 { "skip", ICMP_SKIP }, 108 { "photuris", ICMP_PHOTURIS } 109 }; 110 111 static const struct icmptypeent icmp6_type[] = { 112 { "unreach", ICMP6_DST_UNREACH }, 113 { "toobig", ICMP6_PACKET_TOO_BIG }, 114 { "timex", ICMP6_TIME_EXCEEDED }, 115 { "paramprob", ICMP6_PARAM_PROB }, 116 { "echoreq", ICMP6_ECHO_REQUEST }, 117 { "echorep", ICMP6_ECHO_REPLY }, 118 { "groupqry", ICMP6_MEMBERSHIP_QUERY }, 119 { "listqry", MLD_LISTENER_QUERY }, 120 { "grouprep", ICMP6_MEMBERSHIP_REPORT }, 121 { "listenrep", MLD_LISTENER_REPORT }, 122 { "groupterm", ICMP6_MEMBERSHIP_REDUCTION }, 123 { "listendone", MLD_LISTENER_DONE }, 124 { "routersol", ND_ROUTER_SOLICIT }, 125 { "routeradv", ND_ROUTER_ADVERT }, 126 { "neighbrsol", ND_NEIGHBOR_SOLICIT }, 127 { "neighbradv", ND_NEIGHBOR_ADVERT }, 128 { "redir", ND_REDIRECT }, 129 { "routrrenum", ICMP6_ROUTER_RENUMBERING }, 130 { "wrureq", ICMP6_WRUREQUEST }, 131 { "wrurep", ICMP6_WRUREPLY }, 132 { "fqdnreq", ICMP6_FQDN_QUERY }, 133 { "fqdnrep", ICMP6_FQDN_REPLY }, 134 { "niqry", ICMP6_NI_QUERY }, 135 { "nirep", ICMP6_NI_REPLY }, 136 { "mtraceresp", MLD_MTRACE_RESP }, 137 { "mtrace", MLD_MTRACE } 138 }; 139 140 static const struct icmpcodeent icmp_code[] = { 141 { "net-unr", ICMP_UNREACH, ICMP_UNREACH_NET }, 142 { "host-unr", ICMP_UNREACH, ICMP_UNREACH_HOST }, 143 { "proto-unr", ICMP_UNREACH, ICMP_UNREACH_PROTOCOL }, 144 { "port-unr", ICMP_UNREACH, ICMP_UNREACH_PORT }, 145 { "needfrag", ICMP_UNREACH, ICMP_UNREACH_NEEDFRAG }, 146 { "srcfail", ICMP_UNREACH, ICMP_UNREACH_SRCFAIL }, 147 { "net-unk", ICMP_UNREACH, ICMP_UNREACH_NET_UNKNOWN }, 148 { "host-unk", ICMP_UNREACH, ICMP_UNREACH_HOST_UNKNOWN }, 149 { "isolate", ICMP_UNREACH, ICMP_UNREACH_ISOLATED }, 150 { "net-prohib", ICMP_UNREACH, ICMP_UNREACH_NET_PROHIB }, 151 { "host-prohib", ICMP_UNREACH, ICMP_UNREACH_HOST_PROHIB }, 152 { "net-tos", ICMP_UNREACH, ICMP_UNREACH_TOSNET }, 153 { "host-tos", ICMP_UNREACH, ICMP_UNREACH_TOSHOST }, 154 { "filter-prohib", ICMP_UNREACH, ICMP_UNREACH_FILTER_PROHIB }, 155 { "host-preced", ICMP_UNREACH, ICMP_UNREACH_HOST_PRECEDENCE }, 156 { "cutoff-preced", ICMP_UNREACH, ICMP_UNREACH_PRECEDENCE_CUTOFF }, 157 { "redir-net", ICMP_REDIRECT, ICMP_REDIRECT_NET }, 158 { "redir-host", ICMP_REDIRECT, ICMP_REDIRECT_HOST }, 159 { "redir-tos-net", ICMP_REDIRECT, ICMP_REDIRECT_TOSNET }, 160 { "redir-tos-host", ICMP_REDIRECT, ICMP_REDIRECT_TOSHOST }, 161 { "normal-adv", ICMP_ROUTERADVERT, ICMP_ROUTERADVERT_NORMAL }, 162 { "common-adv", ICMP_ROUTERADVERT, ICMP_ROUTERADVERT_NOROUTE_COMMON }, 163 { "transit", ICMP_TIMXCEED, ICMP_TIMXCEED_INTRANS }, 164 { "reassemb", ICMP_TIMXCEED, ICMP_TIMXCEED_REASS }, 165 { "badhead", ICMP_PARAMPROB, ICMP_PARAMPROB_ERRATPTR }, 166 { "optmiss", ICMP_PARAMPROB, ICMP_PARAMPROB_OPTABSENT }, 167 { "badlen", ICMP_PARAMPROB, ICMP_PARAMPROB_LENGTH }, 168 { "unknown-ind", ICMP_PHOTURIS, ICMP_PHOTURIS_UNKNOWN_INDEX }, 169 { "auth-fail", ICMP_PHOTURIS, ICMP_PHOTURIS_AUTH_FAILED }, 170 { "decrypt-fail", ICMP_PHOTURIS, ICMP_PHOTURIS_DECRYPT_FAILED } 171 }; 172 173 static const struct icmpcodeent icmp6_code[] = { 174 { "admin-unr", ICMP6_DST_UNREACH, ICMP6_DST_UNREACH_ADMIN }, 175 { "noroute-unr", ICMP6_DST_UNREACH, ICMP6_DST_UNREACH_NOROUTE }, 176 { "notnbr-unr", ICMP6_DST_UNREACH, ICMP6_DST_UNREACH_NOTNEIGHBOR }, 177 { "beyond-unr", ICMP6_DST_UNREACH, ICMP6_DST_UNREACH_BEYONDSCOPE }, 178 { "addr-unr", ICMP6_DST_UNREACH, ICMP6_DST_UNREACH_ADDR }, 179 { "port-unr", ICMP6_DST_UNREACH, ICMP6_DST_UNREACH_NOPORT }, 180 { "transit", ICMP6_TIME_EXCEEDED, ICMP6_TIME_EXCEED_TRANSIT }, 181 { "reassemb", ICMP6_TIME_EXCEEDED, ICMP6_TIME_EXCEED_REASSEMBLY }, 182 { "badhead", ICMP6_PARAM_PROB, ICMP6_PARAMPROB_HEADER }, 183 { "nxthdr", ICMP6_PARAM_PROB, ICMP6_PARAMPROB_NEXTHEADER }, 184 { "redironlink", ND_REDIRECT, ND_REDIRECT_ONLINK }, 185 { "redirrouter", ND_REDIRECT, ND_REDIRECT_ROUTER } 186 }; 187 188 const struct pf_timeout pf_timeouts[] = { 189 { "tcp.first", PFTM_TCP_FIRST_PACKET }, 190 { "tcp.opening", PFTM_TCP_OPENING }, 191 { "tcp.established", PFTM_TCP_ESTABLISHED }, 192 { "tcp.closing", PFTM_TCP_CLOSING }, 193 { "tcp.finwait", PFTM_TCP_FIN_WAIT }, 194 { "tcp.closed", PFTM_TCP_CLOSED }, 195 { "tcp.tsdiff", PFTM_TS_DIFF }, 196 { "udp.first", PFTM_UDP_FIRST_PACKET }, 197 { "udp.single", PFTM_UDP_SINGLE }, 198 { "udp.multiple", PFTM_UDP_MULTIPLE }, 199 { "icmp.first", PFTM_ICMP_FIRST_PACKET }, 200 { "icmp.error", PFTM_ICMP_ERROR_REPLY }, 201 { "other.first", PFTM_OTHER_FIRST_PACKET }, 202 { "other.single", PFTM_OTHER_SINGLE }, 203 { "other.multiple", PFTM_OTHER_MULTIPLE }, 204 { "frag", PFTM_FRAG }, 205 { "interval", PFTM_INTERVAL }, 206 { "adaptive.start", PFTM_ADAPTIVE_START }, 207 { "adaptive.end", PFTM_ADAPTIVE_END }, 208 { "src.track", PFTM_SRC_NODE }, 209 { NULL, 0 } 210 }; 211 212 static struct hsearch_data isgroup_map; 213 214 static __attribute__((constructor)) void 215 pfctl_parser_init(void) 216 { 217 /* 218 * As hdestroy() will never be called on these tables, it will be 219 * safe to use references into the stored data as keys. 220 */ 221 if (hcreate_r(0, &isgroup_map) == 0) 222 err(1, "Failed to create interface group query response map"); 223 } 224 225 const struct icmptypeent * 226 geticmptypebynumber(u_int8_t type, sa_family_t af) 227 { 228 unsigned int i; 229 230 if (af != AF_INET6) { 231 for (i=0; i < nitems(icmp_type); i++) { 232 if (type == icmp_type[i].type) 233 return (&icmp_type[i]); 234 } 235 } else { 236 for (i=0; i < nitems(icmp6_type); i++) { 237 if (type == icmp6_type[i].type) 238 return (&icmp6_type[i]); 239 } 240 } 241 return (NULL); 242 } 243 244 const struct icmptypeent * 245 geticmptypebyname(char *w, sa_family_t af) 246 { 247 unsigned int i; 248 249 if (af != AF_INET6) { 250 for (i=0; i < nitems(icmp_type); i++) { 251 if (!strcmp(w, icmp_type[i].name)) 252 return (&icmp_type[i]); 253 } 254 } else { 255 for (i=0; i < nitems(icmp6_type); i++) { 256 if (!strcmp(w, icmp6_type[i].name)) 257 return (&icmp6_type[i]); 258 } 259 } 260 return (NULL); 261 } 262 263 const struct icmpcodeent * 264 geticmpcodebynumber(u_int8_t type, u_int8_t code, sa_family_t af) 265 { 266 unsigned int i; 267 268 if (af != AF_INET6) { 269 for (i=0; i < nitems(icmp_code); i++) { 270 if (type == icmp_code[i].type && 271 code == icmp_code[i].code) 272 return (&icmp_code[i]); 273 } 274 } else { 275 for (i=0; i < nitems(icmp6_code); i++) { 276 if (type == icmp6_code[i].type && 277 code == icmp6_code[i].code) 278 return (&icmp6_code[i]); 279 } 280 } 281 return (NULL); 282 } 283 284 const struct icmpcodeent * 285 geticmpcodebyname(u_long type, char *w, sa_family_t af) 286 { 287 unsigned int i; 288 289 if (af != AF_INET6) { 290 for (i=0; i < nitems(icmp_code); i++) { 291 if (type == icmp_code[i].type && 292 !strcmp(w, icmp_code[i].name)) 293 return (&icmp_code[i]); 294 } 295 } else { 296 for (i=0; i < nitems(icmp6_code); i++) { 297 if (type == icmp6_code[i].type && 298 !strcmp(w, icmp6_code[i].name)) 299 return (&icmp6_code[i]); 300 } 301 } 302 return (NULL); 303 } 304 305 void 306 print_op(u_int8_t op, const char *a1, const char *a2) 307 { 308 if (op == PF_OP_IRG) 309 printf(" %s >< %s", a1, a2); 310 else if (op == PF_OP_XRG) 311 printf(" %s <> %s", a1, a2); 312 else if (op == PF_OP_EQ) 313 printf(" = %s", a1); 314 else if (op == PF_OP_NE) 315 printf(" != %s", a1); 316 else if (op == PF_OP_LT) 317 printf(" < %s", a1); 318 else if (op == PF_OP_LE) 319 printf(" <= %s", a1); 320 else if (op == PF_OP_GT) 321 printf(" > %s", a1); 322 else if (op == PF_OP_GE) 323 printf(" >= %s", a1); 324 else if (op == PF_OP_RRG) 325 printf(" %s:%s", a1, a2); 326 } 327 328 void 329 print_port(u_int8_t op, u_int16_t p1, u_int16_t p2, const char *proto, int numeric) 330 { 331 char a1[6], a2[6]; 332 struct servent *s; 333 334 if (!numeric) 335 s = getservbyport(p1, proto); 336 else 337 s = NULL; 338 p1 = ntohs(p1); 339 p2 = ntohs(p2); 340 snprintf(a1, sizeof(a1), "%u", p1); 341 snprintf(a2, sizeof(a2), "%u", p2); 342 printf(" port"); 343 if (s != NULL && (op == PF_OP_EQ || op == PF_OP_NE)) 344 print_op(op, s->s_name, a2); 345 else 346 print_op(op, a1, a2); 347 } 348 349 void 350 print_ugid(u_int8_t op, unsigned u1, unsigned u2, const char *t, unsigned umax) 351 { 352 char a1[11], a2[11]; 353 354 snprintf(a1, sizeof(a1), "%u", u1); 355 snprintf(a2, sizeof(a2), "%u", u2); 356 printf(" %s", t); 357 if (u1 == umax && (op == PF_OP_EQ || op == PF_OP_NE)) 358 print_op(op, "unknown", a2); 359 else 360 print_op(op, a1, a2); 361 } 362 363 void 364 print_flags(u_int8_t f) 365 { 366 int i; 367 368 for (i = 0; tcpflags[i]; ++i) 369 if (f & (1 << i)) 370 printf("%c", tcpflags[i]); 371 } 372 373 void 374 print_fromto(struct pf_rule_addr *src, pf_osfp_t osfp, struct pf_rule_addr *dst, 375 sa_family_t af, u_int8_t proto, int verbose, int numeric) 376 { 377 char buf[PF_OSFP_LEN*3]; 378 if (src->addr.type == PF_ADDR_ADDRMASK && 379 dst->addr.type == PF_ADDR_ADDRMASK && 380 PF_AZERO(&src->addr.v.a.addr, AF_INET6) && 381 PF_AZERO(&src->addr.v.a.mask, AF_INET6) && 382 PF_AZERO(&dst->addr.v.a.addr, AF_INET6) && 383 PF_AZERO(&dst->addr.v.a.mask, AF_INET6) && 384 !src->neg && !dst->neg && 385 !src->port_op && !dst->port_op && 386 osfp == PF_OSFP_ANY) 387 printf(" all"); 388 else { 389 printf(" from "); 390 if (src->neg) 391 printf("! "); 392 print_addr(&src->addr, af, verbose); 393 if (src->port_op) 394 print_port(src->port_op, src->port[0], 395 src->port[1], 396 proto == IPPROTO_TCP ? "tcp" : "udp", 397 numeric); 398 if (osfp != PF_OSFP_ANY) 399 printf(" os \"%s\"", pfctl_lookup_fingerprint(osfp, buf, 400 sizeof(buf))); 401 402 printf(" to "); 403 if (dst->neg) 404 printf("! "); 405 print_addr(&dst->addr, af, verbose); 406 if (dst->port_op) 407 print_port(dst->port_op, dst->port[0], 408 dst->port[1], 409 proto == IPPROTO_TCP ? "tcp" : "udp", 410 numeric); 411 } 412 } 413 414 void 415 print_pool(struct pfctl_pool *pool, u_int16_t p1, u_int16_t p2, 416 sa_family_t af, int id) 417 { 418 struct pf_pooladdr *pooladdr; 419 420 if ((TAILQ_FIRST(&pool->list) != NULL) && 421 TAILQ_NEXT(TAILQ_FIRST(&pool->list), entries) != NULL) 422 printf("{ "); 423 TAILQ_FOREACH(pooladdr, &pool->list, entries){ 424 switch (id) { 425 case PF_NAT: 426 case PF_RDR: 427 case PF_BINAT: 428 print_addr(&pooladdr->addr, af, 0); 429 break; 430 case PF_PASS: 431 if (PF_AZERO(&pooladdr->addr.v.a.addr, af)) 432 printf("%s", pooladdr->ifname); 433 else { 434 printf("(%s ", pooladdr->ifname); 435 print_addr(&pooladdr->addr, af, 0); 436 printf(")"); 437 } 438 break; 439 default: 440 break; 441 } 442 if (TAILQ_NEXT(pooladdr, entries) != NULL) 443 printf(", "); 444 else if (TAILQ_NEXT(TAILQ_FIRST(&pool->list), entries) != NULL) 445 printf(" }"); 446 } 447 switch (id) { 448 case PF_NAT: 449 if ((p1 != PF_NAT_PROXY_PORT_LOW || 450 p2 != PF_NAT_PROXY_PORT_HIGH) && (p1 != 0 || p2 != 0)) { 451 if (p1 == p2) 452 printf(" port %u", p1); 453 else 454 printf(" port %u:%u", p1, p2); 455 } 456 break; 457 case PF_RDR: 458 if (p1) { 459 printf(" port %u", p1); 460 if (p2 && (p2 != p1)) 461 printf(":%u", p2); 462 } 463 break; 464 default: 465 break; 466 } 467 switch (pool->opts & PF_POOL_TYPEMASK) { 468 case PF_POOL_NONE: 469 break; 470 case PF_POOL_BITMASK: 471 printf(" bitmask"); 472 break; 473 case PF_POOL_RANDOM: 474 printf(" random"); 475 break; 476 case PF_POOL_SRCHASH: 477 printf(" source-hash 0x%08x%08x%08x%08x", 478 pool->key.key32[0], pool->key.key32[1], 479 pool->key.key32[2], pool->key.key32[3]); 480 break; 481 case PF_POOL_ROUNDROBIN: 482 printf(" round-robin"); 483 break; 484 } 485 if (pool->opts & PF_POOL_STICKYADDR) 486 printf(" sticky-address"); 487 if (id == PF_NAT && p1 == 0 && p2 == 0) 488 printf(" static-port"); 489 if (pool->mape.offset > 0) 490 printf(" map-e-portset %u/%u/%u", 491 pool->mape.offset, pool->mape.psidlen, pool->mape.psid); 492 } 493 494 const char * const pf_reasons[PFRES_MAX+1] = PFRES_NAMES; 495 const char * const pf_lcounters[LCNT_MAX+1] = LCNT_NAMES; 496 const char * const pf_fcounters[FCNT_MAX+1] = FCNT_NAMES; 497 const char * const pf_scounters[FCNT_MAX+1] = FCNT_NAMES; 498 499 void 500 print_status(struct pfctl_status *s, struct pfctl_syncookies *cookies, int opts) 501 { 502 struct pfctl_status_counter *c; 503 char statline[80], *running; 504 time_t runtime; 505 int i; 506 char buf[PF_MD5_DIGEST_LENGTH * 2 + 1]; 507 static const char hex[] = "0123456789abcdef"; 508 509 runtime = time(NULL) - s->since; 510 running = s->running ? "Enabled" : "Disabled"; 511 512 if (s->since) { 513 unsigned int sec, min, hrs, day = runtime; 514 515 sec = day % 60; 516 day /= 60; 517 min = day % 60; 518 day /= 60; 519 hrs = day % 24; 520 day /= 24; 521 snprintf(statline, sizeof(statline), 522 "Status: %s for %u days %.2u:%.2u:%.2u", 523 running, day, hrs, min, sec); 524 } else 525 snprintf(statline, sizeof(statline), "Status: %s", running); 526 printf("%-44s", statline); 527 switch (s->debug) { 528 case PF_DEBUG_NONE: 529 printf("%15s\n\n", "Debug: None"); 530 break; 531 case PF_DEBUG_URGENT: 532 printf("%15s\n\n", "Debug: Urgent"); 533 break; 534 case PF_DEBUG_MISC: 535 printf("%15s\n\n", "Debug: Misc"); 536 break; 537 case PF_DEBUG_NOISY: 538 printf("%15s\n\n", "Debug: Loud"); 539 break; 540 } 541 542 if (opts & PF_OPT_VERBOSE) { 543 printf("Hostid: 0x%08x\n", ntohl(s->hostid)); 544 545 for (i = 0; i < PF_MD5_DIGEST_LENGTH; i++) { 546 buf[i + i] = hex[s->pf_chksum[i] >> 4]; 547 buf[i + i + 1] = hex[s->pf_chksum[i] & 0x0f]; 548 } 549 buf[i + i] = '\0'; 550 printf("Checksum: 0x%s\n\n", buf); 551 } 552 553 if (s->ifname[0] != 0) { 554 printf("Interface Stats for %-16s %5s %16s\n", 555 s->ifname, "IPv4", "IPv6"); 556 printf(" %-25s %14llu %16llu\n", "Bytes In", 557 (unsigned long long)s->bcounters[0][0], 558 (unsigned long long)s->bcounters[1][0]); 559 printf(" %-25s %14llu %16llu\n", "Bytes Out", 560 (unsigned long long)s->bcounters[0][1], 561 (unsigned long long)s->bcounters[1][1]); 562 printf(" Packets In\n"); 563 printf(" %-23s %14llu %16llu\n", "Passed", 564 (unsigned long long)s->pcounters[0][0][PF_PASS], 565 (unsigned long long)s->pcounters[1][0][PF_PASS]); 566 printf(" %-23s %14llu %16llu\n", "Blocked", 567 (unsigned long long)s->pcounters[0][0][PF_DROP], 568 (unsigned long long)s->pcounters[1][0][PF_DROP]); 569 printf(" Packets Out\n"); 570 printf(" %-23s %14llu %16llu\n", "Passed", 571 (unsigned long long)s->pcounters[0][1][PF_PASS], 572 (unsigned long long)s->pcounters[1][1][PF_PASS]); 573 printf(" %-23s %14llu %16llu\n\n", "Blocked", 574 (unsigned long long)s->pcounters[0][1][PF_DROP], 575 (unsigned long long)s->pcounters[1][1][PF_DROP]); 576 } 577 printf("%-27s %14s %16s\n", "State Table", "Total", "Rate"); 578 printf(" %-25s %14ju %14s\n", "current entries", s->states, ""); 579 TAILQ_FOREACH(c, &s->fcounters, entry) { 580 printf(" %-25s %14ju ", c->name, c->counter); 581 if (runtime > 0) 582 printf("%14.1f/s\n", 583 (double)c->counter / (double)runtime); 584 else 585 printf("%14s\n", ""); 586 } 587 if (opts & PF_OPT_VERBOSE) { 588 printf("Source Tracking Table\n"); 589 printf(" %-25s %14ju %14s\n", "current entries", 590 s->src_nodes, ""); 591 TAILQ_FOREACH(c, &s->scounters, entry) { 592 printf(" %-25s %14ju ", c->name, c->counter); 593 if (runtime > 0) 594 printf("%14.1f/s\n", 595 (double)c->counter / (double)runtime); 596 else 597 printf("%14s\n", ""); 598 } 599 } 600 printf("Counters\n"); 601 TAILQ_FOREACH(c, &s->counters, entry) { 602 printf(" %-25s %14ju ", c->name, c->counter); 603 if (runtime > 0) 604 printf("%14.1f/s\n", 605 (double)c->counter / (double)runtime); 606 else 607 printf("%14s\n", ""); 608 } 609 if (opts & PF_OPT_VERBOSE) { 610 printf("Limit Counters\n"); 611 TAILQ_FOREACH(c, &s->lcounters, entry) { 612 printf(" %-25s %14ju ", c->name, c->counter); 613 if (runtime > 0) 614 printf("%14.1f/s\n", 615 (double)c->counter / (double)runtime); 616 else 617 printf("%14s\n", ""); 618 } 619 620 printf("Syncookies\n"); 621 printf(" %-25s %s\n", "mode", 622 cookies->mode == PFCTL_SYNCOOKIES_NEVER ? 623 "never" : "always"); 624 } 625 } 626 627 void 628 print_running(struct pfctl_status *status) 629 { 630 printf("%s\n", status->running ? "Enabled" : "Disabled"); 631 } 632 633 void 634 print_src_node(struct pf_src_node *sn, int opts) 635 { 636 struct pf_addr_wrap aw; 637 int min, sec; 638 639 memset(&aw, 0, sizeof(aw)); 640 if (sn->af == AF_INET) 641 aw.v.a.mask.addr32[0] = 0xffffffff; 642 else 643 memset(&aw.v.a.mask, 0xff, sizeof(aw.v.a.mask)); 644 645 aw.v.a.addr = sn->addr; 646 print_addr(&aw, sn->af, opts & PF_OPT_VERBOSE2); 647 printf(" -> "); 648 aw.v.a.addr = sn->raddr; 649 print_addr(&aw, sn->af, opts & PF_OPT_VERBOSE2); 650 printf(" ( states %u, connections %u, rate %u.%u/%us )\n", sn->states, 651 sn->conn, sn->conn_rate.count / 1000, 652 (sn->conn_rate.count % 1000) / 100, sn->conn_rate.seconds); 653 if (opts & PF_OPT_VERBOSE) { 654 sec = sn->creation % 60; 655 sn->creation /= 60; 656 min = sn->creation % 60; 657 sn->creation /= 60; 658 printf(" age %.2u:%.2u:%.2u", sn->creation, min, sec); 659 if (sn->states == 0) { 660 sec = sn->expire % 60; 661 sn->expire /= 60; 662 min = sn->expire % 60; 663 sn->expire /= 60; 664 printf(", expires in %.2u:%.2u:%.2u", 665 sn->expire, min, sec); 666 } 667 printf(", %llu pkts, %llu bytes", 668 #ifdef __FreeBSD__ 669 (unsigned long long)(sn->packets[0] + sn->packets[1]), 670 (unsigned long long)(sn->bytes[0] + sn->bytes[1])); 671 #else 672 sn->packets[0] + sn->packets[1], 673 sn->bytes[0] + sn->bytes[1]); 674 #endif 675 switch (sn->ruletype) { 676 case PF_NAT: 677 if (sn->rule.nr != -1) 678 printf(", nat rule %u", sn->rule.nr); 679 break; 680 case PF_RDR: 681 if (sn->rule.nr != -1) 682 printf(", rdr rule %u", sn->rule.nr); 683 break; 684 case PF_PASS: 685 if (sn->rule.nr != -1) 686 printf(", filter rule %u", sn->rule.nr); 687 break; 688 } 689 printf("\n"); 690 } 691 } 692 693 void 694 print_rule(struct pfctl_rule *r, const char *anchor_call, int verbose, int numeric) 695 { 696 static const char *actiontypes[] = { "pass", "block", "scrub", 697 "no scrub", "nat", "no nat", "binat", "no binat", "rdr", "no rdr" }; 698 static const char *anchortypes[] = { "anchor", "anchor", "anchor", 699 "anchor", "nat-anchor", "nat-anchor", "binat-anchor", 700 "binat-anchor", "rdr-anchor", "rdr-anchor" }; 701 int i, opts; 702 703 if (verbose) 704 printf("@%d ", r->nr); 705 if (r->action == PF_MATCH) 706 printf("match"); 707 else if (r->action > PF_NORDR) 708 printf("action(%d)", r->action); 709 else if (anchor_call[0]) { 710 if (anchor_call[0] == '_') { 711 printf("%s", anchortypes[r->action]); 712 } else 713 printf("%s \"%s\"", anchortypes[r->action], 714 anchor_call); 715 } else { 716 printf("%s", actiontypes[r->action]); 717 if (r->natpass) 718 printf(" pass"); 719 } 720 if (r->action == PF_DROP) { 721 if (r->rule_flag & PFRULE_RETURN) 722 printf(" return"); 723 else if (r->rule_flag & PFRULE_RETURNRST) { 724 if (!r->return_ttl) 725 printf(" return-rst"); 726 else 727 printf(" return-rst(ttl %d)", r->return_ttl); 728 } else if (r->rule_flag & PFRULE_RETURNICMP) { 729 const struct icmpcodeent *ic, *ic6; 730 731 ic = geticmpcodebynumber(r->return_icmp >> 8, 732 r->return_icmp & 255, AF_INET); 733 ic6 = geticmpcodebynumber(r->return_icmp6 >> 8, 734 r->return_icmp6 & 255, AF_INET6); 735 736 switch (r->af) { 737 case AF_INET: 738 printf(" return-icmp"); 739 if (ic == NULL) 740 printf("(%u)", r->return_icmp & 255); 741 else 742 printf("(%s)", ic->name); 743 break; 744 case AF_INET6: 745 printf(" return-icmp6"); 746 if (ic6 == NULL) 747 printf("(%u)", r->return_icmp6 & 255); 748 else 749 printf("(%s)", ic6->name); 750 break; 751 default: 752 printf(" return-icmp"); 753 if (ic == NULL) 754 printf("(%u, ", r->return_icmp & 255); 755 else 756 printf("(%s, ", ic->name); 757 if (ic6 == NULL) 758 printf("%u)", r->return_icmp6 & 255); 759 else 760 printf("%s)", ic6->name); 761 break; 762 } 763 } else 764 printf(" drop"); 765 } 766 if (r->direction == PF_IN) 767 printf(" in"); 768 else if (r->direction == PF_OUT) 769 printf(" out"); 770 if (r->log) { 771 printf(" log"); 772 if (r->log & ~PF_LOG || r->logif) { 773 int count = 0; 774 775 printf(" ("); 776 if (r->log & PF_LOG_ALL) 777 printf("%sall", count++ ? ", " : ""); 778 if (r->log & PF_LOG_SOCKET_LOOKUP) 779 printf("%suser", count++ ? ", " : ""); 780 if (r->logif) 781 printf("%sto pflog%u", count++ ? ", " : "", 782 r->logif); 783 printf(")"); 784 } 785 } 786 if (r->quick) 787 printf(" quick"); 788 if (r->ifname[0]) { 789 if (r->ifnot) 790 printf(" on ! %s", r->ifname); 791 else 792 printf(" on %s", r->ifname); 793 } 794 if (r->rt) { 795 if (r->rt == PF_ROUTETO) 796 printf(" route-to"); 797 else if (r->rt == PF_REPLYTO) 798 printf(" reply-to"); 799 else if (r->rt == PF_DUPTO) 800 printf(" dup-to"); 801 printf(" "); 802 print_pool(&r->rpool, 0, 0, r->af, PF_PASS); 803 } 804 if (r->af) { 805 if (r->af == AF_INET) 806 printf(" inet"); 807 else 808 printf(" inet6"); 809 } 810 if (r->proto) { 811 const char *protoname; 812 813 if ((protoname = pfctl_proto2name(r->proto)) != NULL) 814 printf(" proto %s", protoname); 815 else 816 printf(" proto %u", r->proto); 817 } 818 print_fromto(&r->src, r->os_fingerprint, &r->dst, r->af, r->proto, 819 verbose, numeric); 820 if (r->uid.op) 821 print_ugid(r->uid.op, r->uid.uid[0], r->uid.uid[1], "user", 822 UID_MAX); 823 if (r->gid.op) 824 print_ugid(r->gid.op, r->gid.gid[0], r->gid.gid[1], "group", 825 GID_MAX); 826 if (r->flags || r->flagset) { 827 printf(" flags "); 828 print_flags(r->flags); 829 printf("/"); 830 print_flags(r->flagset); 831 } else if (r->action == PF_PASS && 832 (!r->proto || r->proto == IPPROTO_TCP) && 833 !(r->rule_flag & PFRULE_FRAGMENT) && 834 !anchor_call[0] && r->keep_state) 835 printf(" flags any"); 836 if (r->type) { 837 const struct icmptypeent *it; 838 839 it = geticmptypebynumber(r->type-1, r->af); 840 if (r->af != AF_INET6) 841 printf(" icmp-type"); 842 else 843 printf(" icmp6-type"); 844 if (it != NULL) 845 printf(" %s", it->name); 846 else 847 printf(" %u", r->type-1); 848 if (r->code) { 849 const struct icmpcodeent *ic; 850 851 ic = geticmpcodebynumber(r->type-1, r->code-1, r->af); 852 if (ic != NULL) 853 printf(" code %s", ic->name); 854 else 855 printf(" code %u", r->code-1); 856 } 857 } 858 if (r->tos) 859 printf(" tos 0x%2.2x", r->tos); 860 if (r->prio) 861 printf(" prio %u", r->prio == PF_PRIO_ZERO ? 0 : r->prio); 862 if (r->scrub_flags & PFSTATE_SETMASK) { 863 char *comma = ""; 864 printf(" set ("); 865 if (r->scrub_flags & PFSTATE_SETPRIO) { 866 if (r->set_prio[0] == r->set_prio[1]) 867 printf("%s prio %u", comma, r->set_prio[0]); 868 else 869 printf("%s prio(%u, %u)", comma, r->set_prio[0], 870 r->set_prio[1]); 871 comma = ","; 872 } 873 printf(" )"); 874 } 875 if (!r->keep_state && r->action == PF_PASS && !anchor_call[0]) 876 printf(" no state"); 877 else if (r->keep_state == PF_STATE_NORMAL) 878 printf(" keep state"); 879 else if (r->keep_state == PF_STATE_MODULATE) 880 printf(" modulate state"); 881 else if (r->keep_state == PF_STATE_SYNPROXY) 882 printf(" synproxy state"); 883 if (r->prob) { 884 char buf[20]; 885 886 snprintf(buf, sizeof(buf), "%f", r->prob*100.0/(UINT_MAX+1.0)); 887 for (i = strlen(buf)-1; i > 0; i--) { 888 if (buf[i] == '0') 889 buf[i] = '\0'; 890 else { 891 if (buf[i] == '.') 892 buf[i] = '\0'; 893 break; 894 } 895 } 896 printf(" probability %s%%", buf); 897 } 898 opts = 0; 899 if (r->max_states || r->max_src_nodes || r->max_src_states) 900 opts = 1; 901 if (r->rule_flag & PFRULE_NOSYNC) 902 opts = 1; 903 if (r->rule_flag & PFRULE_SRCTRACK) 904 opts = 1; 905 if (r->rule_flag & PFRULE_IFBOUND) 906 opts = 1; 907 if (r->rule_flag & PFRULE_STATESLOPPY) 908 opts = 1; 909 for (i = 0; !opts && i < PFTM_MAX; ++i) 910 if (r->timeout[i]) 911 opts = 1; 912 if (opts) { 913 printf(" ("); 914 if (r->max_states) { 915 printf("max %u", r->max_states); 916 opts = 0; 917 } 918 if (r->rule_flag & PFRULE_NOSYNC) { 919 if (!opts) 920 printf(", "); 921 printf("no-sync"); 922 opts = 0; 923 } 924 if (r->rule_flag & PFRULE_SRCTRACK) { 925 if (!opts) 926 printf(", "); 927 printf("source-track"); 928 if (r->rule_flag & PFRULE_RULESRCTRACK) 929 printf(" rule"); 930 else 931 printf(" global"); 932 opts = 0; 933 } 934 if (r->max_src_states) { 935 if (!opts) 936 printf(", "); 937 printf("max-src-states %u", r->max_src_states); 938 opts = 0; 939 } 940 if (r->max_src_conn) { 941 if (!opts) 942 printf(", "); 943 printf("max-src-conn %u", r->max_src_conn); 944 opts = 0; 945 } 946 if (r->max_src_conn_rate.limit) { 947 if (!opts) 948 printf(", "); 949 printf("max-src-conn-rate %u/%u", 950 r->max_src_conn_rate.limit, 951 r->max_src_conn_rate.seconds); 952 opts = 0; 953 } 954 if (r->max_src_nodes) { 955 if (!opts) 956 printf(", "); 957 printf("max-src-nodes %u", r->max_src_nodes); 958 opts = 0; 959 } 960 if (r->overload_tblname[0]) { 961 if (!opts) 962 printf(", "); 963 printf("overload <%s>", r->overload_tblname); 964 if (r->flush) 965 printf(" flush"); 966 if (r->flush & PF_FLUSH_GLOBAL) 967 printf(" global"); 968 } 969 if (r->rule_flag & PFRULE_IFBOUND) { 970 if (!opts) 971 printf(", "); 972 printf("if-bound"); 973 opts = 0; 974 } 975 if (r->rule_flag & PFRULE_STATESLOPPY) { 976 if (!opts) 977 printf(", "); 978 printf("sloppy"); 979 opts = 0; 980 } 981 for (i = 0; i < PFTM_MAX; ++i) 982 if (r->timeout[i]) { 983 int j; 984 985 if (!opts) 986 printf(", "); 987 opts = 0; 988 for (j = 0; pf_timeouts[j].name != NULL; 989 ++j) 990 if (pf_timeouts[j].timeout == i) 991 break; 992 printf("%s %u", pf_timeouts[j].name == NULL ? 993 "inv.timeout" : pf_timeouts[j].name, 994 r->timeout[i]); 995 } 996 printf(")"); 997 } 998 if (r->rule_flag & PFRULE_FRAGMENT) 999 printf(" fragment"); 1000 if (r->rule_flag & PFRULE_NODF) 1001 printf(" no-df"); 1002 if (r->rule_flag & PFRULE_RANDOMID) 1003 printf(" random-id"); 1004 if (r->min_ttl) 1005 printf(" min-ttl %d", r->min_ttl); 1006 if (r->max_mss) 1007 printf(" max-mss %d", r->max_mss); 1008 if (r->rule_flag & PFRULE_SET_TOS) 1009 printf(" set-tos 0x%2.2x", r->set_tos); 1010 if (r->allow_opts) 1011 printf(" allow-opts"); 1012 if (r->action == PF_SCRUB) { 1013 if (r->rule_flag & PFRULE_REASSEMBLE_TCP) 1014 printf(" reassemble tcp"); 1015 1016 printf(" fragment reassemble"); 1017 } 1018 i = 0; 1019 while (r->label[i][0]) 1020 printf(" label \"%s\"", r->label[i++]); 1021 if (r->qname[0] && r->pqname[0]) 1022 printf(" queue(%s, %s)", r->qname, r->pqname); 1023 else if (r->qname[0]) 1024 printf(" queue %s", r->qname); 1025 if (r->tagname[0]) 1026 printf(" tag %s", r->tagname); 1027 if (r->match_tagname[0]) { 1028 if (r->match_tag_not) 1029 printf(" !"); 1030 printf(" tagged %s", r->match_tagname); 1031 } 1032 if (r->rtableid != -1) 1033 printf(" rtable %u", r->rtableid); 1034 if (r->divert.port) { 1035 #ifdef __FreeBSD__ 1036 printf(" divert-to %u", ntohs(r->divert.port)); 1037 #else 1038 if (PF_AZERO(&r->divert.addr, r->af)) { 1039 printf(" divert-reply"); 1040 } else { 1041 /* XXX cut&paste from print_addr */ 1042 char buf[48]; 1043 1044 printf(" divert-to "); 1045 if (inet_ntop(r->af, &r->divert.addr, buf, 1046 sizeof(buf)) == NULL) 1047 printf("?"); 1048 else 1049 printf("%s", buf); 1050 printf(" port %u", ntohs(r->divert.port)); 1051 } 1052 #endif 1053 } 1054 if (!anchor_call[0] && (r->action == PF_NAT || 1055 r->action == PF_BINAT || r->action == PF_RDR)) { 1056 printf(" -> "); 1057 print_pool(&r->rpool, r->rpool.proxy_port[0], 1058 r->rpool.proxy_port[1], r->af, r->action); 1059 } 1060 } 1061 1062 void 1063 print_tabledef(const char *name, int flags, int addrs, 1064 struct node_tinithead *nodes) 1065 { 1066 struct node_tinit *ti, *nti; 1067 struct node_host *h; 1068 1069 printf("table <%s>", name); 1070 if (flags & PFR_TFLAG_CONST) 1071 printf(" const"); 1072 if (flags & PFR_TFLAG_PERSIST) 1073 printf(" persist"); 1074 if (flags & PFR_TFLAG_COUNTERS) 1075 printf(" counters"); 1076 SIMPLEQ_FOREACH(ti, nodes, entries) { 1077 if (ti->file) { 1078 printf(" file \"%s\"", ti->file); 1079 continue; 1080 } 1081 printf(" {"); 1082 for (;;) { 1083 for (h = ti->host; h != NULL; h = h->next) { 1084 printf(h->not ? " !" : " "); 1085 print_addr(&h->addr, h->af, 0); 1086 } 1087 nti = SIMPLEQ_NEXT(ti, entries); 1088 if (nti != NULL && nti->file == NULL) 1089 ti = nti; /* merge lists */ 1090 else 1091 break; 1092 } 1093 printf(" }"); 1094 } 1095 if (addrs && SIMPLEQ_EMPTY(nodes)) 1096 printf(" { }"); 1097 printf("\n"); 1098 } 1099 1100 int 1101 parse_flags(char *s) 1102 { 1103 char *p, *q; 1104 u_int8_t f = 0; 1105 1106 for (p = s; *p; p++) { 1107 if ((q = strchr(tcpflags, *p)) == NULL) 1108 return -1; 1109 else 1110 f |= 1 << (q - tcpflags); 1111 } 1112 return (f ? f : PF_TH_ALL); 1113 } 1114 1115 void 1116 set_ipmask(struct node_host *h, u_int8_t b) 1117 { 1118 struct pf_addr *m, *n; 1119 int i, j = 0; 1120 1121 m = &h->addr.v.a.mask; 1122 memset(m, 0, sizeof(*m)); 1123 1124 while (b >= 32) { 1125 m->addr32[j++] = 0xffffffff; 1126 b -= 32; 1127 } 1128 for (i = 31; i > 31-b; --i) 1129 m->addr32[j] |= (1 << i); 1130 if (b) 1131 m->addr32[j] = htonl(m->addr32[j]); 1132 1133 /* Mask off bits of the address that will never be used. */ 1134 n = &h->addr.v.a.addr; 1135 if (h->addr.type == PF_ADDR_ADDRMASK) 1136 for (i = 0; i < 4; i++) 1137 n->addr32[i] = n->addr32[i] & m->addr32[i]; 1138 } 1139 1140 int 1141 check_netmask(struct node_host *h, sa_family_t af) 1142 { 1143 struct node_host *n = NULL; 1144 struct pf_addr *m; 1145 1146 for (n = h; n != NULL; n = n->next) { 1147 if (h->addr.type == PF_ADDR_TABLE) 1148 continue; 1149 m = &h->addr.v.a.mask; 1150 /* fix up netmask for dynaddr */ 1151 if (af == AF_INET && h->addr.type == PF_ADDR_DYNIFTL && 1152 unmask(m, AF_INET6) > 32) 1153 set_ipmask(n, 32); 1154 /* netmasks > 32 bit are invalid on v4 */ 1155 if (af == AF_INET && 1156 (m->addr32[1] || m->addr32[2] || m->addr32[3])) { 1157 fprintf(stderr, "netmask %u invalid for IPv4 address\n", 1158 unmask(m, AF_INET6)); 1159 return (1); 1160 } 1161 } 1162 return (0); 1163 } 1164 1165 /* interface lookup routines */ 1166 1167 static struct node_host *iftab; 1168 1169 /* 1170 * Retrieve the list of groups this interface is a member of and make sure 1171 * each group is in the group map. 1172 */ 1173 static void 1174 ifa_add_groups_to_map(char *ifa_name) 1175 { 1176 int s, len; 1177 struct ifgroupreq ifgr; 1178 struct ifg_req *ifg; 1179 1180 s = get_query_socket(); 1181 1182 /* Get size of group list for this interface */ 1183 memset(&ifgr, 0, sizeof(ifgr)); 1184 strlcpy(ifgr.ifgr_name, ifa_name, IFNAMSIZ); 1185 if (ioctl(s, SIOCGIFGROUP, (caddr_t)&ifgr) == -1) 1186 err(1, "SIOCGIFGROUP"); 1187 1188 /* Retrieve group list for this interface */ 1189 len = ifgr.ifgr_len; 1190 ifgr.ifgr_groups = 1191 (struct ifg_req *)calloc(len / sizeof(struct ifg_req), 1192 sizeof(struct ifg_req)); 1193 if (ifgr.ifgr_groups == NULL) 1194 err(1, "calloc"); 1195 if (ioctl(s, SIOCGIFGROUP, (caddr_t)&ifgr) == -1) 1196 err(1, "SIOCGIFGROUP"); 1197 1198 ifg = ifgr.ifgr_groups; 1199 for (; ifg && len >= sizeof(struct ifg_req); ifg++) { 1200 len -= sizeof(struct ifg_req); 1201 if (strcmp(ifg->ifgrq_group, "all")) { 1202 ENTRY item; 1203 ENTRY *ret_item; 1204 int *answer; 1205 1206 item.key = ifg->ifgrq_group; 1207 if (hsearch_r(item, FIND, &ret_item, &isgroup_map) == 0) { 1208 struct ifgroupreq ifgr2; 1209 1210 /* Don't know the answer yet */ 1211 if ((answer = malloc(sizeof(int))) == NULL) 1212 err(1, "malloc"); 1213 1214 bzero(&ifgr2, sizeof(ifgr2)); 1215 strlcpy(ifgr2.ifgr_name, ifg->ifgrq_group, 1216 sizeof(ifgr2.ifgr_name)); 1217 if (ioctl(s, SIOCGIFGMEMB, (caddr_t)&ifgr2) == 0) 1218 *answer = ifgr2.ifgr_len; 1219 else 1220 *answer = 0; 1221 1222 item.key = strdup(ifg->ifgrq_group); 1223 item.data = answer; 1224 if (hsearch_r(item, ENTER, &ret_item, 1225 &isgroup_map) == 0) 1226 err(1, "interface group query response" 1227 " map insert"); 1228 } 1229 } 1230 } 1231 free(ifgr.ifgr_groups); 1232 } 1233 1234 void 1235 ifa_load(void) 1236 { 1237 struct ifaddrs *ifap, *ifa; 1238 struct node_host *n = NULL, *h = NULL; 1239 1240 if (getifaddrs(&ifap) < 0) 1241 err(1, "getifaddrs"); 1242 1243 for (ifa = ifap; ifa; ifa = ifa->ifa_next) { 1244 if (!(ifa->ifa_addr->sa_family == AF_INET || 1245 ifa->ifa_addr->sa_family == AF_INET6 || 1246 ifa->ifa_addr->sa_family == AF_LINK)) 1247 continue; 1248 n = calloc(1, sizeof(struct node_host)); 1249 if (n == NULL) 1250 err(1, "address: calloc"); 1251 n->af = ifa->ifa_addr->sa_family; 1252 n->ifa_flags = ifa->ifa_flags; 1253 #ifdef __KAME__ 1254 if (n->af == AF_INET6 && 1255 IN6_IS_ADDR_LINKLOCAL(&((struct sockaddr_in6 *) 1256 ifa->ifa_addr)->sin6_addr) && 1257 ((struct sockaddr_in6 *)ifa->ifa_addr)->sin6_scope_id == 1258 0) { 1259 struct sockaddr_in6 *sin6; 1260 1261 sin6 = (struct sockaddr_in6 *)ifa->ifa_addr; 1262 sin6->sin6_scope_id = sin6->sin6_addr.s6_addr[2] << 8 | 1263 sin6->sin6_addr.s6_addr[3]; 1264 sin6->sin6_addr.s6_addr[2] = 0; 1265 sin6->sin6_addr.s6_addr[3] = 0; 1266 } 1267 #endif 1268 n->ifindex = 0; 1269 if (n->af == AF_INET) { 1270 memcpy(&n->addr.v.a.addr, &((struct sockaddr_in *) 1271 ifa->ifa_addr)->sin_addr.s_addr, 1272 sizeof(struct in_addr)); 1273 memcpy(&n->addr.v.a.mask, &((struct sockaddr_in *) 1274 ifa->ifa_netmask)->sin_addr.s_addr, 1275 sizeof(struct in_addr)); 1276 if (ifa->ifa_broadaddr != NULL) 1277 memcpy(&n->bcast, &((struct sockaddr_in *) 1278 ifa->ifa_broadaddr)->sin_addr.s_addr, 1279 sizeof(struct in_addr)); 1280 if (ifa->ifa_dstaddr != NULL) 1281 memcpy(&n->peer, &((struct sockaddr_in *) 1282 ifa->ifa_dstaddr)->sin_addr.s_addr, 1283 sizeof(struct in_addr)); 1284 } else if (n->af == AF_INET6) { 1285 memcpy(&n->addr.v.a.addr, &((struct sockaddr_in6 *) 1286 ifa->ifa_addr)->sin6_addr.s6_addr, 1287 sizeof(struct in6_addr)); 1288 memcpy(&n->addr.v.a.mask, &((struct sockaddr_in6 *) 1289 ifa->ifa_netmask)->sin6_addr.s6_addr, 1290 sizeof(struct in6_addr)); 1291 if (ifa->ifa_broadaddr != NULL) 1292 memcpy(&n->bcast, &((struct sockaddr_in6 *) 1293 ifa->ifa_broadaddr)->sin6_addr.s6_addr, 1294 sizeof(struct in6_addr)); 1295 if (ifa->ifa_dstaddr != NULL) 1296 memcpy(&n->peer, &((struct sockaddr_in6 *) 1297 ifa->ifa_dstaddr)->sin6_addr.s6_addr, 1298 sizeof(struct in6_addr)); 1299 n->ifindex = ((struct sockaddr_in6 *) 1300 ifa->ifa_addr)->sin6_scope_id; 1301 } else if (n->af == AF_LINK) { 1302 ifa_add_groups_to_map(ifa->ifa_name); 1303 } 1304 if ((n->ifname = strdup(ifa->ifa_name)) == NULL) 1305 err(1, "ifa_load: strdup"); 1306 n->next = NULL; 1307 n->tail = n; 1308 if (h == NULL) 1309 h = n; 1310 else { 1311 h->tail->next = n; 1312 h->tail = n; 1313 } 1314 } 1315 1316 iftab = h; 1317 freeifaddrs(ifap); 1318 } 1319 1320 static int 1321 get_socket_domain(void) 1322 { 1323 int sdom; 1324 1325 sdom = AF_UNSPEC; 1326 #ifdef WITH_INET6 1327 if (sdom == AF_UNSPEC && feature_present("inet6")) 1328 sdom = AF_INET6; 1329 #endif 1330 #ifdef WITH_INET 1331 if (sdom == AF_UNSPEC && feature_present("inet")) 1332 sdom = AF_INET; 1333 #endif 1334 if (sdom == AF_UNSPEC) 1335 sdom = AF_LINK; 1336 1337 return (sdom); 1338 } 1339 1340 int 1341 get_query_socket(void) 1342 { 1343 static int s = -1; 1344 1345 if (s == -1) { 1346 if ((s = socket(get_socket_domain(), SOCK_DGRAM, 0)) == -1) 1347 err(1, "socket"); 1348 } 1349 1350 return (s); 1351 } 1352 1353 /* 1354 * Returns the response len if the name is a group, otherwise returns 0. 1355 */ 1356 static int 1357 is_a_group(char *name) 1358 { 1359 ENTRY item; 1360 ENTRY *ret_item; 1361 1362 item.key = name; 1363 if (hsearch_r(item, FIND, &ret_item, &isgroup_map) == 0) 1364 return (0); 1365 1366 return (*(int *)ret_item->data); 1367 } 1368 1369 struct node_host * 1370 ifa_exists(char *ifa_name) 1371 { 1372 struct node_host *n; 1373 1374 if (iftab == NULL) 1375 ifa_load(); 1376 1377 /* check whether this is a group */ 1378 if (is_a_group(ifa_name)) { 1379 /* fake a node_host */ 1380 if ((n = calloc(1, sizeof(*n))) == NULL) 1381 err(1, "calloc"); 1382 if ((n->ifname = strdup(ifa_name)) == NULL) 1383 err(1, "strdup"); 1384 return (n); 1385 } 1386 1387 for (n = iftab; n; n = n->next) { 1388 if (n->af == AF_LINK && !strncmp(n->ifname, ifa_name, IFNAMSIZ)) 1389 return (n); 1390 } 1391 1392 return (NULL); 1393 } 1394 1395 struct node_host * 1396 ifa_grouplookup(char *ifa_name, int flags) 1397 { 1398 struct ifg_req *ifg; 1399 struct ifgroupreq ifgr; 1400 int s, len; 1401 struct node_host *n, *h = NULL; 1402 1403 s = get_query_socket(); 1404 len = is_a_group(ifa_name); 1405 if (len == 0) 1406 return (NULL); 1407 bzero(&ifgr, sizeof(ifgr)); 1408 strlcpy(ifgr.ifgr_name, ifa_name, sizeof(ifgr.ifgr_name)); 1409 ifgr.ifgr_len = len; 1410 if ((ifgr.ifgr_groups = calloc(1, len)) == NULL) 1411 err(1, "calloc"); 1412 if (ioctl(s, SIOCGIFGMEMB, (caddr_t)&ifgr) == -1) 1413 err(1, "SIOCGIFGMEMB"); 1414 1415 for (ifg = ifgr.ifgr_groups; ifg && len >= sizeof(struct ifg_req); 1416 ifg++) { 1417 len -= sizeof(struct ifg_req); 1418 if ((n = ifa_lookup(ifg->ifgrq_member, flags)) == NULL) 1419 continue; 1420 if (h == NULL) 1421 h = n; 1422 else { 1423 h->tail->next = n; 1424 h->tail = n->tail; 1425 } 1426 } 1427 free(ifgr.ifgr_groups); 1428 1429 return (h); 1430 } 1431 1432 struct node_host * 1433 ifa_lookup(char *ifa_name, int flags) 1434 { 1435 struct node_host *p = NULL, *h = NULL, *n = NULL; 1436 int got4 = 0, got6 = 0; 1437 const char *last_if = NULL; 1438 1439 /* first load iftab and isgroup_map */ 1440 if (iftab == NULL) 1441 ifa_load(); 1442 1443 if ((h = ifa_grouplookup(ifa_name, flags)) != NULL) 1444 return (h); 1445 1446 if (!strncmp(ifa_name, "self", IFNAMSIZ)) 1447 ifa_name = NULL; 1448 1449 for (p = iftab; p; p = p->next) { 1450 if (ifa_skip_if(ifa_name, p)) 1451 continue; 1452 if ((flags & PFI_AFLAG_BROADCAST) && p->af != AF_INET) 1453 continue; 1454 if ((flags & PFI_AFLAG_BROADCAST) && 1455 !(p->ifa_flags & IFF_BROADCAST)) 1456 continue; 1457 if ((flags & PFI_AFLAG_PEER) && 1458 !(p->ifa_flags & IFF_POINTOPOINT)) 1459 continue; 1460 if ((flags & PFI_AFLAG_NETWORK) && p->ifindex > 0) 1461 continue; 1462 if (last_if == NULL || strcmp(last_if, p->ifname)) 1463 got4 = got6 = 0; 1464 last_if = p->ifname; 1465 if ((flags & PFI_AFLAG_NOALIAS) && p->af == AF_INET && got4) 1466 continue; 1467 if ((flags & PFI_AFLAG_NOALIAS) && p->af == AF_INET6 && 1468 IN6_IS_ADDR_LINKLOCAL(&p->addr.v.a.addr.v6)) 1469 continue; 1470 if ((flags & PFI_AFLAG_NOALIAS) && p->af == AF_INET6 && got6) 1471 continue; 1472 if (p->af == AF_INET) 1473 got4 = 1; 1474 else 1475 got6 = 1; 1476 n = calloc(1, sizeof(struct node_host)); 1477 if (n == NULL) 1478 err(1, "address: calloc"); 1479 n->af = p->af; 1480 if (flags & PFI_AFLAG_BROADCAST) 1481 memcpy(&n->addr.v.a.addr, &p->bcast, 1482 sizeof(struct pf_addr)); 1483 else if (flags & PFI_AFLAG_PEER) 1484 memcpy(&n->addr.v.a.addr, &p->peer, 1485 sizeof(struct pf_addr)); 1486 else 1487 memcpy(&n->addr.v.a.addr, &p->addr.v.a.addr, 1488 sizeof(struct pf_addr)); 1489 if (flags & PFI_AFLAG_NETWORK) 1490 set_ipmask(n, unmask(&p->addr.v.a.mask, n->af)); 1491 else { 1492 if (n->af == AF_INET) { 1493 if (p->ifa_flags & IFF_LOOPBACK && 1494 p->ifa_flags & IFF_LINK1) 1495 memcpy(&n->addr.v.a.mask, 1496 &p->addr.v.a.mask, 1497 sizeof(struct pf_addr)); 1498 else 1499 set_ipmask(n, 32); 1500 } else 1501 set_ipmask(n, 128); 1502 } 1503 n->ifindex = p->ifindex; 1504 n->ifname = strdup(p->ifname); 1505 1506 n->next = NULL; 1507 n->tail = n; 1508 if (h == NULL) 1509 h = n; 1510 else { 1511 h->tail->next = n; 1512 h->tail = n; 1513 } 1514 } 1515 return (h); 1516 } 1517 1518 int 1519 ifa_skip_if(const char *filter, struct node_host *p) 1520 { 1521 int n; 1522 1523 if (p->af != AF_INET && p->af != AF_INET6) 1524 return (1); 1525 if (filter == NULL || !*filter) 1526 return (0); 1527 if (!strcmp(p->ifname, filter)) 1528 return (0); /* exact match */ 1529 n = strlen(filter); 1530 if (n < 1 || n >= IFNAMSIZ) 1531 return (1); /* sanity check */ 1532 if (filter[n-1] >= '0' && filter[n-1] <= '9') 1533 return (1); /* only do exact match in that case */ 1534 if (strncmp(p->ifname, filter, n)) 1535 return (1); /* prefix doesn't match */ 1536 return (p->ifname[n] < '0' || p->ifname[n] > '9'); 1537 } 1538 1539 1540 struct node_host * 1541 host(const char *s) 1542 { 1543 struct node_host *h = NULL; 1544 int mask, v4mask, v6mask, cont = 1; 1545 char *p, *q, *ps; 1546 1547 if ((p = strrchr(s, '/')) != NULL) { 1548 mask = strtol(p+1, &q, 0); 1549 if (!q || *q || mask > 128 || q == (p+1)) { 1550 fprintf(stderr, "invalid netmask '%s'\n", p); 1551 return (NULL); 1552 } 1553 if ((ps = malloc(strlen(s) - strlen(p) + 1)) == NULL) 1554 err(1, "host: malloc"); 1555 strlcpy(ps, s, strlen(s) - strlen(p) + 1); 1556 v4mask = v6mask = mask; 1557 } else { 1558 if ((ps = strdup(s)) == NULL) 1559 err(1, "host: strdup"); 1560 v4mask = 32; 1561 v6mask = 128; 1562 mask = -1; 1563 } 1564 1565 /* IPv4 address? */ 1566 if (cont && (h = host_v4(s, mask)) != NULL) 1567 cont = 0; 1568 1569 /* IPv6 address? */ 1570 if (cont && (h = host_v6(ps, v6mask)) != NULL) 1571 cont = 0; 1572 1573 /* interface with this name exists? */ 1574 /* expensive with thousands of interfaces - prioritze IPv4/6 check */ 1575 if (cont && (h = host_if(ps, mask)) != NULL) 1576 cont = 0; 1577 1578 /* dns lookup */ 1579 if (cont && (h = host_dns(ps, v4mask, v6mask)) != NULL) 1580 cont = 0; 1581 free(ps); 1582 1583 if (h == NULL || cont == 1) { 1584 fprintf(stderr, "no IP address found for %s\n", s); 1585 return (NULL); 1586 } 1587 return (h); 1588 } 1589 1590 struct node_host * 1591 host_if(const char *s, int mask) 1592 { 1593 struct node_host *n, *h = NULL; 1594 char *p, *ps; 1595 int flags = 0; 1596 1597 if ((ps = strdup(s)) == NULL) 1598 err(1, "host_if: strdup"); 1599 while ((p = strrchr(ps, ':')) != NULL) { 1600 if (!strcmp(p+1, "network")) 1601 flags |= PFI_AFLAG_NETWORK; 1602 else if (!strcmp(p+1, "broadcast")) 1603 flags |= PFI_AFLAG_BROADCAST; 1604 else if (!strcmp(p+1, "peer")) 1605 flags |= PFI_AFLAG_PEER; 1606 else if (!strcmp(p+1, "0")) 1607 flags |= PFI_AFLAG_NOALIAS; 1608 else { 1609 free(ps); 1610 return (NULL); 1611 } 1612 *p = '\0'; 1613 } 1614 if (flags & (flags - 1) & PFI_AFLAG_MODEMASK) { /* Yep! */ 1615 fprintf(stderr, "illegal combination of interface modifiers\n"); 1616 free(ps); 1617 return (NULL); 1618 } 1619 if ((flags & (PFI_AFLAG_NETWORK|PFI_AFLAG_BROADCAST)) && mask > -1) { 1620 fprintf(stderr, "network or broadcast lookup, but " 1621 "extra netmask given\n"); 1622 free(ps); 1623 return (NULL); 1624 } 1625 if (ifa_exists(ps) || !strncmp(ps, "self", IFNAMSIZ)) { 1626 /* interface with this name exists */ 1627 h = ifa_lookup(ps, flags); 1628 for (n = h; n != NULL && mask > -1; n = n->next) 1629 set_ipmask(n, mask); 1630 } 1631 1632 free(ps); 1633 return (h); 1634 } 1635 1636 struct node_host * 1637 host_v4(const char *s, int mask) 1638 { 1639 struct node_host *h = NULL; 1640 struct in_addr ina; 1641 int bits = 32; 1642 1643 memset(&ina, 0, sizeof(struct in_addr)); 1644 if (strrchr(s, '/') != NULL) { 1645 if ((bits = inet_net_pton(AF_INET, s, &ina, sizeof(ina))) == -1) 1646 return (NULL); 1647 } else { 1648 if (inet_pton(AF_INET, s, &ina) != 1) 1649 return (NULL); 1650 } 1651 1652 h = calloc(1, sizeof(struct node_host)); 1653 if (h == NULL) 1654 err(1, "address: calloc"); 1655 h->ifname = NULL; 1656 h->af = AF_INET; 1657 h->addr.v.a.addr.addr32[0] = ina.s_addr; 1658 set_ipmask(h, bits); 1659 h->next = NULL; 1660 h->tail = h; 1661 1662 return (h); 1663 } 1664 1665 struct node_host * 1666 host_v6(const char *s, int mask) 1667 { 1668 struct addrinfo hints, *res; 1669 struct node_host *h = NULL; 1670 1671 memset(&hints, 0, sizeof(hints)); 1672 hints.ai_family = AF_INET6; 1673 hints.ai_socktype = SOCK_DGRAM; /*dummy*/ 1674 hints.ai_flags = AI_NUMERICHOST; 1675 if (getaddrinfo(s, "0", &hints, &res) == 0) { 1676 h = calloc(1, sizeof(struct node_host)); 1677 if (h == NULL) 1678 err(1, "address: calloc"); 1679 h->ifname = NULL; 1680 h->af = AF_INET6; 1681 memcpy(&h->addr.v.a.addr, 1682 &((struct sockaddr_in6 *)res->ai_addr)->sin6_addr, 1683 sizeof(h->addr.v.a.addr)); 1684 h->ifindex = 1685 ((struct sockaddr_in6 *)res->ai_addr)->sin6_scope_id; 1686 set_ipmask(h, mask); 1687 freeaddrinfo(res); 1688 h->next = NULL; 1689 h->tail = h; 1690 } 1691 1692 return (h); 1693 } 1694 1695 struct node_host * 1696 host_dns(const char *s, int v4mask, int v6mask) 1697 { 1698 struct addrinfo hints, *res0, *res; 1699 struct node_host *n, *h = NULL; 1700 int error, noalias = 0; 1701 int got4 = 0, got6 = 0; 1702 char *p, *ps; 1703 1704 if ((ps = strdup(s)) == NULL) 1705 err(1, "host_dns: strdup"); 1706 if ((p = strrchr(ps, ':')) != NULL && !strcmp(p, ":0")) { 1707 noalias = 1; 1708 *p = '\0'; 1709 } 1710 memset(&hints, 0, sizeof(hints)); 1711 hints.ai_family = PF_UNSPEC; 1712 hints.ai_socktype = SOCK_STREAM; /* DUMMY */ 1713 error = getaddrinfo(ps, NULL, &hints, &res0); 1714 if (error) { 1715 free(ps); 1716 return (h); 1717 } 1718 1719 for (res = res0; res; res = res->ai_next) { 1720 if (res->ai_family != AF_INET && 1721 res->ai_family != AF_INET6) 1722 continue; 1723 if (noalias) { 1724 if (res->ai_family == AF_INET) { 1725 if (got4) 1726 continue; 1727 got4 = 1; 1728 } else { 1729 if (got6) 1730 continue; 1731 got6 = 1; 1732 } 1733 } 1734 n = calloc(1, sizeof(struct node_host)); 1735 if (n == NULL) 1736 err(1, "host_dns: calloc"); 1737 n->ifname = NULL; 1738 n->af = res->ai_family; 1739 if (res->ai_family == AF_INET) { 1740 memcpy(&n->addr.v.a.addr, 1741 &((struct sockaddr_in *) 1742 res->ai_addr)->sin_addr.s_addr, 1743 sizeof(struct in_addr)); 1744 set_ipmask(n, v4mask); 1745 } else { 1746 memcpy(&n->addr.v.a.addr, 1747 &((struct sockaddr_in6 *) 1748 res->ai_addr)->sin6_addr.s6_addr, 1749 sizeof(struct in6_addr)); 1750 n->ifindex = 1751 ((struct sockaddr_in6 *) 1752 res->ai_addr)->sin6_scope_id; 1753 set_ipmask(n, v6mask); 1754 } 1755 n->next = NULL; 1756 n->tail = n; 1757 if (h == NULL) 1758 h = n; 1759 else { 1760 h->tail->next = n; 1761 h->tail = n; 1762 } 1763 } 1764 freeaddrinfo(res0); 1765 free(ps); 1766 1767 return (h); 1768 } 1769 1770 /* 1771 * convert a hostname to a list of addresses and put them in the given buffer. 1772 * test: 1773 * if set to 1, only simple addresses are accepted (no netblock, no "!"). 1774 */ 1775 int 1776 append_addr(struct pfr_buffer *b, char *s, int test) 1777 { 1778 char *r; 1779 struct node_host *h, *n; 1780 int rv, not = 0; 1781 1782 for (r = s; *r == '!'; r++) 1783 not = !not; 1784 if ((n = host(r)) == NULL) { 1785 errno = 0; 1786 return (-1); 1787 } 1788 rv = append_addr_host(b, n, test, not); 1789 do { 1790 h = n; 1791 n = n->next; 1792 free(h); 1793 } while (n != NULL); 1794 return (rv); 1795 } 1796 1797 /* 1798 * same as previous function, but with a pre-parsed input and the ability 1799 * to "negate" the result. Does not free the node_host list. 1800 * not: 1801 * setting it to 1 is equivalent to adding "!" in front of parameter s. 1802 */ 1803 int 1804 append_addr_host(struct pfr_buffer *b, struct node_host *n, int test, int not) 1805 { 1806 int bits; 1807 struct pfr_addr addr; 1808 1809 do { 1810 bzero(&addr, sizeof(addr)); 1811 addr.pfra_not = n->not ^ not; 1812 addr.pfra_af = n->af; 1813 addr.pfra_net = unmask(&n->addr.v.a.mask, n->af); 1814 switch (n->af) { 1815 case AF_INET: 1816 addr.pfra_ip4addr.s_addr = n->addr.v.a.addr.addr32[0]; 1817 bits = 32; 1818 break; 1819 case AF_INET6: 1820 memcpy(&addr.pfra_ip6addr, &n->addr.v.a.addr.v6, 1821 sizeof(struct in6_addr)); 1822 bits = 128; 1823 break; 1824 default: 1825 errno = EINVAL; 1826 return (-1); 1827 } 1828 if ((test && (not || addr.pfra_net != bits)) || 1829 addr.pfra_net > bits) { 1830 errno = EINVAL; 1831 return (-1); 1832 } 1833 if (pfr_buf_add(b, &addr)) 1834 return (-1); 1835 } while ((n = n->next) != NULL); 1836 1837 return (0); 1838 } 1839 1840 int 1841 pfctl_add_trans(struct pfr_buffer *buf, int rs_num, const char *anchor) 1842 { 1843 struct pfioc_trans_e trans; 1844 1845 bzero(&trans, sizeof(trans)); 1846 trans.rs_num = rs_num; 1847 if (strlcpy(trans.anchor, anchor, 1848 sizeof(trans.anchor)) >= sizeof(trans.anchor)) 1849 errx(1, "pfctl_add_trans: strlcpy"); 1850 1851 return pfr_buf_add(buf, &trans); 1852 } 1853 1854 u_int32_t 1855 pfctl_get_ticket(struct pfr_buffer *buf, int rs_num, const char *anchor) 1856 { 1857 struct pfioc_trans_e *p; 1858 1859 PFRB_FOREACH(p, buf) 1860 if (rs_num == p->rs_num && !strcmp(anchor, p->anchor)) 1861 return (p->ticket); 1862 errx(1, "pfctl_get_ticket: assertion failed"); 1863 } 1864 1865 int 1866 pfctl_trans(int dev, struct pfr_buffer *buf, u_long cmd, int from) 1867 { 1868 struct pfioc_trans trans; 1869 1870 bzero(&trans, sizeof(trans)); 1871 trans.size = buf->pfrb_size - from; 1872 trans.esize = sizeof(struct pfioc_trans_e); 1873 trans.array = ((struct pfioc_trans_e *)buf->pfrb_caddr) + from; 1874 return ioctl(dev, cmd, &trans); 1875 } 1876