1 /* $NetBSD: pfctl_parser.c,v 1.6 2004/11/21 18:01:14 peter Exp $ */ 2 /* $OpenBSD: pfctl_parser.c,v 1.203.2.1 2004/11/13 23:52:14 brad Exp $ */ 3 4 /* 5 * Copyright (c) 2001 Daniel Hartmeier 6 * Copyright (c) 2002,2003 Henning Brauer 7 * All rights reserved. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 13 * - Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * - Redistributions in binary form must reproduce the above 16 * copyright notice, this list of conditions and the following 17 * disclaimer in the documentation and/or other materials provided 18 * with the distribution. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 21 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 22 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 23 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE 24 * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 26 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 27 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER 28 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN 30 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 31 * POSSIBILITY OF SUCH DAMAGE. 32 * 33 */ 34 35 #include <sys/types.h> 36 #include <sys/ioctl.h> 37 #include <sys/socket.h> 38 #include <net/if.h> 39 #include <netinet/in.h> 40 #include <netinet/in_systm.h> 41 #include <netinet/ip.h> 42 #include <netinet/ip_icmp.h> 43 #include <netinet/icmp6.h> 44 #include <net/pfvar.h> 45 #include <arpa/inet.h> 46 47 #include <stdio.h> 48 #include <stdlib.h> 49 #include <string.h> 50 #include <ctype.h> 51 #include <netdb.h> 52 #include <stdarg.h> 53 #include <errno.h> 54 #include <err.h> 55 #include <ifaddrs.h> 56 #ifdef __NetBSD__ 57 #include <limits.h> 58 #endif 59 60 #include "pfctl_parser.h" 61 #include "pfctl.h" 62 63 void print_op (u_int8_t, const char *, const char *); 64 void print_port (u_int8_t, u_int16_t, u_int16_t, const char *); 65 void print_ugid (u_int8_t, unsigned, unsigned, const char *, unsigned); 66 void print_flags (u_int8_t); 67 void print_fromto(struct pf_rule_addr *, pf_osfp_t, 68 struct pf_rule_addr *, u_int8_t, u_int8_t, int); 69 int ifa_skip_if(const char *filter, struct node_host *p); 70 71 struct node_host *host_if(const char *, int); 72 struct node_host *host_v4(const char *, int); 73 struct node_host *host_v6(const char *, int); 74 struct node_host *host_dns(const char *, int, int); 75 76 const char *tcpflags = "FSRPAUEW"; 77 78 static const struct icmptypeent icmp_type[] = { 79 { "echoreq", ICMP_ECHO }, 80 { "echorep", ICMP_ECHOREPLY }, 81 { "unreach", ICMP_UNREACH }, 82 { "squench", ICMP_SOURCEQUENCH }, 83 { "redir", ICMP_REDIRECT }, 84 #ifdef ICMP_ALTHOSTADDR 85 { "althost", ICMP_ALTHOSTADDR }, 86 #endif 87 { "routeradv", ICMP_ROUTERADVERT }, 88 { "routersol", ICMP_ROUTERSOLICIT }, 89 { "timex", ICMP_TIMXCEED }, 90 { "paramprob", ICMP_PARAMPROB }, 91 { "timereq", ICMP_TSTAMP }, 92 { "timerep", ICMP_TSTAMPREPLY }, 93 { "inforeq", ICMP_IREQ }, 94 { "inforep", ICMP_IREQREPLY }, 95 { "maskreq", ICMP_MASKREQ }, 96 { "maskrep", ICMP_MASKREPLY }, 97 #ifdef ICMP_TRACEROUTE 98 { "trace", ICMP_TRACEROUTE }, 99 #endif 100 #ifdef ICMP_DATACONVERR 101 { "dataconv", ICMP_DATACONVERR }, 102 #endif 103 #ifdef ICMP_MOBILE_REDIRECT 104 { "mobredir", ICMP_MOBILE_REDIRECT }, 105 #endif 106 #ifdef ICMP_IPV6_WHEREAREYOU 107 { "ipv6-where", ICMP_IPV6_WHEREAREYOU }, 108 #endif 109 #ifdef ICMP_IPV6_IAMHERE 110 { "ipv6-here", ICMP_IPV6_IAMHERE }, 111 #endif 112 #ifdef ICMP_MOBILE_REGREQUEST 113 { "mobregreq", ICMP_MOBILE_REGREQUEST }, 114 #endif 115 #ifdef ICMP_MOBILE_REGREPLY 116 { "mobregrep", ICMP_MOBILE_REGREPLY }, 117 #endif 118 #ifdef ICMP_SKIP 119 { "skip", ICMP_SKIP }, 120 #endif 121 #ifdef ICMP_PHOTURIS 122 { "photuris", ICMP_PHOTURIS } 123 #endif 124 }; 125 126 static const struct icmptypeent icmp6_type[] = { 127 { "unreach", ICMP6_DST_UNREACH }, 128 { "toobig", ICMP6_PACKET_TOO_BIG }, 129 { "timex", ICMP6_TIME_EXCEEDED }, 130 { "paramprob", ICMP6_PARAM_PROB }, 131 { "echoreq", ICMP6_ECHO_REQUEST }, 132 { "echorep", ICMP6_ECHO_REPLY }, 133 { "groupqry", ICMP6_MEMBERSHIP_QUERY }, 134 { "listqry", MLD_LISTENER_QUERY }, 135 { "grouprep", ICMP6_MEMBERSHIP_REPORT }, 136 { "listenrep", MLD_LISTENER_REPORT }, 137 { "groupterm", ICMP6_MEMBERSHIP_REDUCTION }, 138 { "listendone", MLD_LISTENER_DONE }, 139 { "routersol", ND_ROUTER_SOLICIT }, 140 { "routeradv", ND_ROUTER_ADVERT }, 141 { "neighbrsol", ND_NEIGHBOR_SOLICIT }, 142 { "neighbradv", ND_NEIGHBOR_ADVERT }, 143 { "redir", ND_REDIRECT }, 144 { "routrrenum", ICMP6_ROUTER_RENUMBERING }, 145 { "wrureq", ICMP6_WRUREQUEST }, 146 { "wrurep", ICMP6_WRUREPLY }, 147 { "fqdnreq", ICMP6_FQDN_QUERY }, 148 { "fqdnrep", ICMP6_FQDN_REPLY }, 149 { "niqry", ICMP6_NI_QUERY }, 150 { "nirep", ICMP6_NI_REPLY }, 151 { "mtraceresp", MLD_MTRACE_RESP }, 152 { "mtrace", MLD_MTRACE } 153 }; 154 155 static const struct icmpcodeent icmp_code[] = { 156 { "net-unr", ICMP_UNREACH, ICMP_UNREACH_NET }, 157 { "host-unr", ICMP_UNREACH, ICMP_UNREACH_HOST }, 158 { "proto-unr", ICMP_UNREACH, ICMP_UNREACH_PROTOCOL }, 159 { "port-unr", ICMP_UNREACH, ICMP_UNREACH_PORT }, 160 { "needfrag", ICMP_UNREACH, ICMP_UNREACH_NEEDFRAG }, 161 { "srcfail", ICMP_UNREACH, ICMP_UNREACH_SRCFAIL }, 162 { "net-unk", ICMP_UNREACH, ICMP_UNREACH_NET_UNKNOWN }, 163 { "host-unk", ICMP_UNREACH, ICMP_UNREACH_HOST_UNKNOWN }, 164 { "isolate", ICMP_UNREACH, ICMP_UNREACH_ISOLATED }, 165 { "net-prohib", ICMP_UNREACH, ICMP_UNREACH_NET_PROHIB }, 166 { "host-prohib", ICMP_UNREACH, ICMP_UNREACH_HOST_PROHIB }, 167 { "net-tos", ICMP_UNREACH, ICMP_UNREACH_TOSNET }, 168 { "host-tos", ICMP_UNREACH, ICMP_UNREACH_TOSHOST }, 169 #ifdef ICMP_UNREACH_FILTER_PROHIB 170 { "filter-prohib", ICMP_UNREACH, ICMP_UNREACH_FILTER_PROHIB }, 171 #endif 172 #ifdef ICMP_UNREACH_HOST_PRECEDENCE 173 { "host-preced", ICMP_UNREACH, ICMP_UNREACH_HOST_PRECEDENCE }, 174 #endif 175 #ifdef ICMP_UNREACH_PRECEDENCE_CUTOFF 176 { "cutoff-preced", ICMP_UNREACH, ICMP_UNREACH_PRECEDENCE_CUTOFF }, 177 #endif 178 { "redir-net", ICMP_REDIRECT, ICMP_REDIRECT_NET }, 179 { "redir-host", ICMP_REDIRECT, ICMP_REDIRECT_HOST }, 180 { "redir-tos-net", ICMP_REDIRECT, ICMP_REDIRECT_TOSNET }, 181 { "redir-tos-host", ICMP_REDIRECT, ICMP_REDIRECT_TOSHOST }, 182 #ifdef ICMP_ROUTERADVERT_NORMAL 183 { "normal-adv", ICMP_ROUTERADVERT, ICMP_ROUTERADVERT_NORMAL }, 184 #endif 185 #ifdef ICMP_ROUTERADVERT_NOROUTE_COMMON 186 { "common-adv", ICMP_ROUTERADVERT, ICMP_ROUTERADVERT_NOROUTE_COMMON }, 187 #endif 188 { "transit", ICMP_TIMXCEED, ICMP_TIMXCEED_INTRANS }, 189 { "reassemb", ICMP_TIMXCEED, ICMP_TIMXCEED_REASS }, 190 #ifdef ICMP_PARAMPROB_ERRATPTR 191 { "badhead", ICMP_PARAMPROB, ICMP_PARAMPROB_ERRATPTR }, 192 #endif 193 { "optmiss", ICMP_PARAMPROB, ICMP_PARAMPROB_OPTABSENT }, 194 #ifdef ICMP_PARAMPROB_LENGTH 195 { "badlen", ICMP_PARAMPROB, ICMP_PARAMPROB_LENGTH }, 196 #endif 197 #ifdef ICMP_PHOTURIS 198 { "unknown-ind", ICMP_PHOTURIS, ICMP_PHOTURIS_UNKNOWN_INDEX }, 199 { "auth-fail", ICMP_PHOTURIS, ICMP_PHOTURIS_AUTH_FAILED }, 200 { "decrypt-fail", ICMP_PHOTURIS, ICMP_PHOTURIS_DECRYPT_FAILED } 201 #endif 202 }; 203 204 static const struct icmpcodeent icmp6_code[] = { 205 { "admin-unr", ICMP6_DST_UNREACH, ICMP6_DST_UNREACH_ADMIN }, 206 { "noroute-unr", ICMP6_DST_UNREACH, ICMP6_DST_UNREACH_NOROUTE }, 207 { "notnbr-unr", ICMP6_DST_UNREACH, ICMP6_DST_UNREACH_NOTNEIGHBOR }, 208 { "beyond-unr", ICMP6_DST_UNREACH, ICMP6_DST_UNREACH_BEYONDSCOPE }, 209 { "addr-unr", ICMP6_DST_UNREACH, ICMP6_DST_UNREACH_ADDR }, 210 { "port-unr", ICMP6_DST_UNREACH, ICMP6_DST_UNREACH_NOPORT }, 211 { "transit", ICMP6_TIME_EXCEEDED, ICMP6_TIME_EXCEED_TRANSIT }, 212 { "reassemb", ICMP6_TIME_EXCEEDED, ICMP6_TIME_EXCEED_REASSEMBLY }, 213 { "badhead", ICMP6_PARAM_PROB, ICMP6_PARAMPROB_HEADER }, 214 { "nxthdr", ICMP6_PARAM_PROB, ICMP6_PARAMPROB_NEXTHEADER }, 215 { "redironlink", ND_REDIRECT, ND_REDIRECT_ONLINK }, 216 { "redirrouter", ND_REDIRECT, ND_REDIRECT_ROUTER } 217 }; 218 219 const struct pf_timeout pf_timeouts[] = { 220 { "tcp.first", PFTM_TCP_FIRST_PACKET }, 221 { "tcp.opening", PFTM_TCP_OPENING }, 222 { "tcp.established", PFTM_TCP_ESTABLISHED }, 223 { "tcp.closing", PFTM_TCP_CLOSING }, 224 { "tcp.finwait", PFTM_TCP_FIN_WAIT }, 225 { "tcp.closed", PFTM_TCP_CLOSED }, 226 { "tcp.tsdiff", PFTM_TS_DIFF }, 227 { "udp.first", PFTM_UDP_FIRST_PACKET }, 228 { "udp.single", PFTM_UDP_SINGLE }, 229 { "udp.multiple", PFTM_UDP_MULTIPLE }, 230 { "icmp.first", PFTM_ICMP_FIRST_PACKET }, 231 { "icmp.error", PFTM_ICMP_ERROR_REPLY }, 232 { "other.first", PFTM_OTHER_FIRST_PACKET }, 233 { "other.single", PFTM_OTHER_SINGLE }, 234 { "other.multiple", PFTM_OTHER_MULTIPLE }, 235 { "frag", PFTM_FRAG }, 236 { "interval", PFTM_INTERVAL }, 237 { "adaptive.start", PFTM_ADAPTIVE_START }, 238 { "adaptive.end", PFTM_ADAPTIVE_END }, 239 { "src.track", PFTM_SRC_NODE }, 240 { NULL, 0 } 241 }; 242 243 const struct icmptypeent * 244 geticmptypebynumber(u_int8_t type, sa_family_t af) 245 { 246 unsigned int i; 247 248 if (af != AF_INET6) { 249 for (i=0; i < (sizeof (icmp_type) / sizeof(icmp_type[0])); 250 i++) { 251 if (type == icmp_type[i].type) 252 return (&icmp_type[i]); 253 } 254 } else { 255 for (i=0; i < (sizeof (icmp6_type) / 256 sizeof(icmp6_type[0])); i++) { 257 if (type == icmp6_type[i].type) 258 return (&icmp6_type[i]); 259 } 260 } 261 return (NULL); 262 } 263 264 const struct icmptypeent * 265 geticmptypebyname(char *w, sa_family_t af) 266 { 267 unsigned int i; 268 269 if (af != AF_INET6) { 270 for (i=0; i < (sizeof (icmp_type) / sizeof(icmp_type[0])); 271 i++) { 272 if (!strcmp(w, icmp_type[i].name)) 273 return (&icmp_type[i]); 274 } 275 } else { 276 for (i=0; i < (sizeof (icmp6_type) / 277 sizeof(icmp6_type[0])); i++) { 278 if (!strcmp(w, icmp6_type[i].name)) 279 return (&icmp6_type[i]); 280 } 281 } 282 return (NULL); 283 } 284 285 const struct icmpcodeent * 286 geticmpcodebynumber(u_int8_t type, u_int8_t code, sa_family_t af) 287 { 288 unsigned int i; 289 290 if (af != AF_INET6) { 291 for (i=0; i < (sizeof (icmp_code) / sizeof(icmp_code[0])); 292 i++) { 293 if (type == icmp_code[i].type && 294 code == icmp_code[i].code) 295 return (&icmp_code[i]); 296 } 297 } else { 298 for (i=0; i < (sizeof (icmp6_code) / 299 sizeof(icmp6_code[0])); i++) { 300 if (type == icmp6_code[i].type && 301 code == icmp6_code[i].code) 302 return (&icmp6_code[i]); 303 } 304 } 305 return (NULL); 306 } 307 308 const struct icmpcodeent * 309 geticmpcodebyname(u_long type, char *w, sa_family_t af) 310 { 311 unsigned int i; 312 313 if (af != AF_INET6) { 314 for (i=0; i < (sizeof (icmp_code) / sizeof(icmp_code[0])); 315 i++) { 316 if (type == icmp_code[i].type && 317 !strcmp(w, icmp_code[i].name)) 318 return (&icmp_code[i]); 319 } 320 } else { 321 for (i=0; i < (sizeof (icmp6_code) / 322 sizeof(icmp6_code[0])); i++) { 323 if (type == icmp6_code[i].type && 324 !strcmp(w, icmp6_code[i].name)) 325 return (&icmp6_code[i]); 326 } 327 } 328 return (NULL); 329 } 330 331 void 332 print_op(u_int8_t op, const char *a1, const char *a2) 333 { 334 if (op == PF_OP_IRG) 335 printf(" %s >< %s", a1, a2); 336 else if (op == PF_OP_XRG) 337 printf(" %s <> %s", a1, a2); 338 else if (op == PF_OP_EQ) 339 printf(" = %s", a1); 340 else if (op == PF_OP_NE) 341 printf(" != %s", a1); 342 else if (op == PF_OP_LT) 343 printf(" < %s", a1); 344 else if (op == PF_OP_LE) 345 printf(" <= %s", a1); 346 else if (op == PF_OP_GT) 347 printf(" > %s", a1); 348 else if (op == PF_OP_GE) 349 printf(" >= %s", a1); 350 else if (op == PF_OP_RRG) 351 printf(" %s:%s", a1, a2); 352 } 353 354 void 355 print_port(u_int8_t op, u_int16_t p1, u_int16_t p2, const char *proto) 356 { 357 char a1[6], a2[6]; 358 struct servent *s; 359 360 s = getservbyport(p1, proto); 361 p1 = ntohs(p1); 362 p2 = ntohs(p2); 363 snprintf(a1, sizeof(a1), "%u", p1); 364 snprintf(a2, sizeof(a2), "%u", p2); 365 printf(" port"); 366 if (s != NULL && (op == PF_OP_EQ || op == PF_OP_NE)) 367 print_op(op, s->s_name, a2); 368 else 369 print_op(op, a1, a2); 370 } 371 372 void 373 print_ugid(u_int8_t op, unsigned u1, unsigned u2, const char *t, unsigned umax) 374 { 375 char a1[11], a2[11]; 376 377 snprintf(a1, sizeof(a1), "%u", u1); 378 snprintf(a2, sizeof(a2), "%u", u2); 379 printf(" %s", t); 380 if (u1 == umax && (op == PF_OP_EQ || op == PF_OP_NE)) 381 print_op(op, "unknown", a2); 382 else 383 print_op(op, a1, a2); 384 } 385 386 void 387 print_flags(u_int8_t f) 388 { 389 int i; 390 391 for (i = 0; tcpflags[i]; ++i) 392 if (f & (1 << i)) 393 printf("%c", tcpflags[i]); 394 } 395 396 void 397 print_fromto(struct pf_rule_addr *src, pf_osfp_t osfp, struct pf_rule_addr *dst, 398 sa_family_t af, u_int8_t proto, int verbose) 399 { 400 char buf[PF_OSFP_LEN*3]; 401 if (src->addr.type == PF_ADDR_ADDRMASK && 402 dst->addr.type == PF_ADDR_ADDRMASK && 403 PF_AZERO(&src->addr.v.a.addr, AF_INET6) && 404 PF_AZERO(&src->addr.v.a.mask, AF_INET6) && 405 PF_AZERO(&dst->addr.v.a.addr, AF_INET6) && 406 PF_AZERO(&dst->addr.v.a.mask, AF_INET6) && 407 !src->neg && !dst->neg && 408 !src->port_op && !dst->port_op && 409 osfp == PF_OSFP_ANY) 410 printf(" all"); 411 else { 412 printf(" from "); 413 if (src->neg) 414 printf("! "); 415 print_addr(&src->addr, af, verbose); 416 if (src->port_op) 417 print_port(src->port_op, src->port[0], 418 src->port[1], 419 proto == IPPROTO_TCP ? "tcp" : "udp"); 420 if (osfp != PF_OSFP_ANY) 421 printf(" os \"%s\"", pfctl_lookup_fingerprint(osfp, buf, 422 sizeof(buf))); 423 424 printf(" to "); 425 if (dst->neg) 426 printf("! "); 427 print_addr(&dst->addr, af, verbose); 428 if (dst->port_op) 429 print_port(dst->port_op, dst->port[0], 430 dst->port[1], 431 proto == IPPROTO_TCP ? "tcp" : "udp"); 432 } 433 } 434 435 void 436 print_pool(struct pf_pool *pool, u_int16_t p1, u_int16_t p2, 437 sa_family_t af, int id) 438 { 439 struct pf_pooladdr *pooladdr; 440 441 if ((TAILQ_FIRST(&pool->list) != NULL) && 442 TAILQ_NEXT(TAILQ_FIRST(&pool->list), entries) != NULL) 443 printf("{ "); 444 TAILQ_FOREACH(pooladdr, &pool->list, entries){ 445 switch (id) { 446 case PF_NAT: 447 case PF_RDR: 448 case PF_BINAT: 449 print_addr(&pooladdr->addr, af, 0); 450 break; 451 case PF_PASS: 452 if (PF_AZERO(&pooladdr->addr.v.a.addr, af)) 453 printf("%s", pooladdr->ifname); 454 else { 455 printf("(%s ", pooladdr->ifname); 456 print_addr(&pooladdr->addr, af, 0); 457 printf(")"); 458 } 459 break; 460 default: 461 break; 462 } 463 if (TAILQ_NEXT(pooladdr, entries) != NULL) 464 printf(", "); 465 else if (TAILQ_NEXT(TAILQ_FIRST(&pool->list), entries) != NULL) 466 printf(" }"); 467 } 468 switch (id) { 469 case PF_NAT: 470 if ((p1 != PF_NAT_PROXY_PORT_LOW || 471 p2 != PF_NAT_PROXY_PORT_HIGH) && (p1 != 0 || p2 != 0)) { 472 if (p1 == p2) 473 printf(" port %u", p1); 474 else 475 printf(" port %u:%u", p1, p2); 476 } 477 break; 478 case PF_RDR: 479 if (p1) { 480 printf(" port %u", p1); 481 if (p2 && (p2 != p1)) 482 printf(":%u", p2); 483 } 484 break; 485 default: 486 break; 487 } 488 switch (pool->opts & PF_POOL_TYPEMASK) { 489 case PF_POOL_NONE: 490 break; 491 case PF_POOL_BITMASK: 492 printf(" bitmask"); 493 break; 494 case PF_POOL_RANDOM: 495 printf(" random"); 496 break; 497 case PF_POOL_SRCHASH: 498 printf(" source-hash 0x%08x%08x%08x%08x", 499 pool->key.key32[0], pool->key.key32[1], 500 pool->key.key32[2], pool->key.key32[3]); 501 break; 502 case PF_POOL_ROUNDROBIN: 503 printf(" round-robin"); 504 break; 505 } 506 if (pool->opts & PF_POOL_STICKYADDR) 507 printf(" sticky-address"); 508 if (id == PF_NAT && p1 == 0 && p2 == 0) 509 printf(" static-port"); 510 } 511 512 const char *pf_reasons[PFRES_MAX+1] = PFRES_NAMES; 513 const char *pf_fcounters[FCNT_MAX+1] = FCNT_NAMES; 514 const char *pf_scounters[FCNT_MAX+1] = FCNT_NAMES; 515 516 void 517 print_status(struct pf_status *s, int opts) 518 { 519 char statline[80], *running; 520 time_t runtime; 521 int i; 522 523 runtime = time(NULL) - s->since; 524 running = s->running ? "Enabled" : "Disabled"; 525 526 if (s->since) { 527 unsigned sec, min, hrs, day = runtime; 528 529 sec = day % 60; 530 day /= 60; 531 min = day % 60; 532 day /= 60; 533 hrs = day % 24; 534 day /= 24; 535 snprintf(statline, sizeof(statline), 536 "Status: %s for %u days %.2u:%.2u:%.2u", 537 running, day, hrs, min, sec); 538 } else 539 snprintf(statline, sizeof(statline), "Status: %s", running); 540 printf("%-44s", statline); 541 switch (s->debug) { 542 case PF_DEBUG_NONE: 543 printf("%15s\n\n", "Debug: None"); 544 break; 545 case PF_DEBUG_URGENT: 546 printf("%15s\n\n", "Debug: Urgent"); 547 break; 548 case PF_DEBUG_MISC: 549 printf("%15s\n\n", "Debug: Misc"); 550 break; 551 case PF_DEBUG_NOISY: 552 printf("%15s\n\n", "Debug: Loud"); 553 break; 554 } 555 printf("Hostid: 0x%08x\n\n", ntohl(s->hostid)); 556 if (s->ifname[0] != 0) { 557 printf("Interface Stats for %-16s %5s %16s\n", 558 s->ifname, "IPv4", "IPv6"); 559 printf(" %-25s %14llu %16llu\n", "Bytes In", 560 (unsigned long long)s->bcounters[0][0], 561 (unsigned long long)s->bcounters[1][0]); 562 printf(" %-25s %14llu %16llu\n", "Bytes Out", 563 (unsigned long long)s->bcounters[0][1], 564 (unsigned long long)s->bcounters[1][1]); 565 printf(" Packets In\n"); 566 printf(" %-23s %14llu %16llu\n", "Passed", 567 (unsigned long long)s->pcounters[0][0][PF_PASS], 568 (unsigned long long)s->pcounters[1][0][PF_PASS]); 569 printf(" %-23s %14llu %16llu\n", "Blocked", 570 (unsigned long long)s->pcounters[0][0][PF_DROP], 571 (unsigned long long)s->pcounters[1][0][PF_DROP]); 572 printf(" Packets Out\n"); 573 printf(" %-23s %14llu %16llu\n", "Passed", 574 (unsigned long long)s->pcounters[0][1][PF_PASS], 575 (unsigned long long)s->pcounters[1][1][PF_PASS]); 576 printf(" %-23s %14llu %16llu\n\n", "Blocked", 577 (unsigned long long)s->pcounters[0][1][PF_DROP], 578 (unsigned long long)s->pcounters[1][1][PF_DROP]); 579 } 580 printf("%-27s %14s %16s\n", "State Table", "Total", "Rate"); 581 printf(" %-25s %14u %14s\n", "current entries", s->states, ""); 582 for (i = 0; i < FCNT_MAX; i++) { 583 printf(" %-25s %14llu ", pf_fcounters[i], 584 (unsigned long long)s->fcounters[i]); 585 if (runtime > 0) 586 printf("%14.1f/s\n", 587 (double)s->fcounters[i] / (double)runtime); 588 else 589 printf("%14s\n", ""); 590 } 591 if (opts & PF_OPT_VERBOSE) { 592 printf("Source Tracking Table\n"); 593 printf(" %-25s %14u %14s\n", "current entries", 594 s->src_nodes, ""); 595 for (i = 0; i < SCNT_MAX; i++) { 596 printf(" %-25s %14lld ", pf_scounters[i], 597 (unsigned long long)s->scounters[i]); 598 if (runtime > 0) 599 printf("%14.1f/s\n", 600 (double)s->scounters[i] / (double)runtime); 601 else 602 printf("%14s\n", ""); 603 } 604 } 605 printf("Counters\n"); 606 for (i = 0; i < PFRES_MAX; i++) { 607 printf(" %-25s %14llu ", pf_reasons[i], 608 (unsigned long long)s->counters[i]); 609 if (runtime > 0) 610 printf("%14.1f/s\n", 611 (double)s->counters[i] / (double)runtime); 612 else 613 printf("%14s\n", ""); 614 } 615 } 616 617 void 618 print_src_node(struct pf_src_node *sn, int opts) 619 { 620 struct pf_addr_wrap aw; 621 int min, sec; 622 623 memset(&aw, 0, sizeof(aw)); 624 if (sn->af == AF_INET) 625 aw.v.a.mask.addr32[0] = 0xffffffff; 626 else 627 memset(&aw.v.a.mask, 0xff, sizeof(aw.v.a.mask)); 628 629 aw.v.a.addr = sn->addr; 630 print_addr(&aw, sn->af, opts & PF_OPT_VERBOSE2); 631 printf(" -> "); 632 aw.v.a.addr = sn->raddr; 633 print_addr(&aw, sn->af, opts & PF_OPT_VERBOSE2); 634 printf(" (%d states)\n", sn->states); 635 if (opts & PF_OPT_VERBOSE) { 636 sec = sn->creation % 60; 637 sn->creation /= 60; 638 min = sn->creation % 60; 639 sn->creation /= 60; 640 printf(" age %.2u:%.2u:%.2u", sn->creation, min, sec); 641 if (sn->states == 0) { 642 sec = sn->expire % 60; 643 sn->expire /= 60; 644 min = sn->expire % 60; 645 sn->expire /= 60; 646 printf(", expires in %.2u:%.2u:%.2u", 647 sn->expire, min, sec); 648 } 649 printf(", %u pkts, %u bytes", sn->packets, sn->bytes); 650 switch (sn->ruletype) { 651 case PF_NAT: 652 if (sn->rule.nr != -1) 653 printf(", nat rule %u", sn->rule.nr); 654 break; 655 case PF_RDR: 656 if (sn->rule.nr != -1) 657 printf(", rdr rule %u", sn->rule.nr); 658 break; 659 case PF_PASS: 660 if (sn->rule.nr != -1) 661 printf(", filter rule %u", sn->rule.nr); 662 break; 663 } 664 printf("\n"); 665 } 666 } 667 668 void 669 print_rule(struct pf_rule *r, const char *anchor_call, int verbose) 670 { 671 static const char *actiontypes[] = { "pass", "block", "scrub", "nat", 672 "no nat", "binat", "no binat", "rdr", "no rdr" }; 673 static const char *anchortypes[] = { "anchor", "anchor", "anchor", 674 "nat-anchor", "nat-anchor", "binat-anchor", "binat-anchor", 675 "rdr-anchor", "rdr-anchor" }; 676 int i, opts; 677 678 if (verbose) 679 printf("@%d ", r->nr); 680 if (r->action > PF_NORDR) 681 printf("action(%d)", r->action); 682 else if (anchor_call[0]) 683 printf("%s %s", anchortypes[r->action], anchor_call); 684 else { 685 printf("%s", actiontypes[r->action]); 686 if (r->natpass) 687 printf(" pass"); 688 } 689 if (r->action == PF_DROP) { 690 if (r->rule_flag & PFRULE_RETURN) 691 printf(" return"); 692 else if (r->rule_flag & PFRULE_RETURNRST) { 693 if (!r->return_ttl) 694 printf(" return-rst"); 695 else 696 printf(" return-rst(ttl %d)", r->return_ttl); 697 } else if (r->rule_flag & PFRULE_RETURNICMP) { 698 const struct icmpcodeent *ic, *ic6; 699 700 ic = geticmpcodebynumber(r->return_icmp >> 8, 701 r->return_icmp & 255, AF_INET); 702 ic6 = geticmpcodebynumber(r->return_icmp6 >> 8, 703 r->return_icmp6 & 255, AF_INET6); 704 705 switch (r->af) { 706 case AF_INET: 707 printf(" return-icmp"); 708 if (ic == NULL) 709 printf("(%u)", r->return_icmp & 255); 710 else 711 printf("(%s)", ic->name); 712 break; 713 case AF_INET6: 714 printf(" return-icmp6"); 715 if (ic6 == NULL) 716 printf("(%u)", r->return_icmp6 & 255); 717 else 718 printf("(%s)", ic6->name); 719 break; 720 default: 721 printf(" return-icmp"); 722 if (ic == NULL) 723 printf("(%u, ", r->return_icmp & 255); 724 else 725 printf("(%s, ", ic->name); 726 if (ic6 == NULL) 727 printf("%u)", r->return_icmp6 & 255); 728 else 729 printf("%s)", ic6->name); 730 break; 731 } 732 } else 733 printf(" drop"); 734 } 735 if (r->direction == PF_IN) 736 printf(" in"); 737 else if (r->direction == PF_OUT) 738 printf(" out"); 739 if (r->log == 1) 740 printf(" log"); 741 else if (r->log == 2) 742 printf(" log-all"); 743 if (r->quick) 744 printf(" quick"); 745 if (r->ifname[0]) { 746 if (r->ifnot) 747 printf(" on ! %s", r->ifname); 748 else 749 printf(" on %s", r->ifname); 750 } 751 if (r->rt) { 752 if (r->rt == PF_ROUTETO) 753 printf(" route-to"); 754 else if (r->rt == PF_REPLYTO) 755 printf(" reply-to"); 756 else if (r->rt == PF_DUPTO) 757 printf(" dup-to"); 758 else if (r->rt == PF_FASTROUTE) 759 printf(" fastroute"); 760 if (r->rt != PF_FASTROUTE) { 761 printf(" "); 762 print_pool(&r->rpool, 0, 0, r->af, PF_PASS); 763 } 764 } 765 if (r->af) { 766 if (r->af == AF_INET) 767 printf(" inet"); 768 else 769 printf(" inet6"); 770 } 771 if (r->proto) { 772 struct protoent *p; 773 774 if ((p = getprotobynumber(r->proto)) != NULL) 775 printf(" proto %s", p->p_name); 776 else 777 printf(" proto %u", r->proto); 778 } 779 print_fromto(&r->src, r->os_fingerprint, &r->dst, r->af, r->proto, 780 verbose); 781 if (r->uid.op) 782 print_ugid(r->uid.op, r->uid.uid[0], r->uid.uid[1], "user", 783 UID_MAX); 784 if (r->gid.op) 785 print_ugid(r->gid.op, r->gid.gid[0], r->gid.gid[1], "group", 786 GID_MAX); 787 if (r->flags || r->flagset) { 788 printf(" flags "); 789 print_flags(r->flags); 790 printf("/"); 791 print_flags(r->flagset); 792 } 793 if (r->type) { 794 const struct icmptypeent *it; 795 796 it = geticmptypebynumber(r->type-1, r->af); 797 if (r->af != AF_INET6) 798 printf(" icmp-type"); 799 else 800 printf(" icmp6-type"); 801 if (it != NULL) 802 printf(" %s", it->name); 803 else 804 printf(" %u", r->type-1); 805 if (r->code) { 806 const struct icmpcodeent *ic; 807 808 ic = geticmpcodebynumber(r->type-1, r->code-1, r->af); 809 if (ic != NULL) 810 printf(" code %s", ic->name); 811 else 812 printf(" code %u", r->code-1); 813 } 814 } 815 if (r->tos) 816 printf(" tos 0x%2.2x", r->tos); 817 if (r->keep_state == PF_STATE_NORMAL) 818 printf(" keep state"); 819 else if (r->keep_state == PF_STATE_MODULATE) 820 printf(" modulate state"); 821 else if (r->keep_state == PF_STATE_SYNPROXY) 822 printf(" synproxy state"); 823 if (r->prob) { 824 char buf[20]; 825 826 snprintf(buf, sizeof(buf), "%f", r->prob*100.0/(UINT_MAX+1.0)); 827 for (i = strlen(buf)-1; i > 0; i--) { 828 if (buf[i] == '0') 829 buf[i] = '\0'; 830 else { 831 if (buf[i] == '.') 832 buf[i] = '\0'; 833 break; 834 } 835 } 836 printf(" probability %s%%", buf); 837 } 838 opts = 0; 839 if (r->max_states || r->max_src_nodes || r->max_src_states) 840 opts = 1; 841 if (r->rule_flag & PFRULE_NOSYNC) 842 opts = 1; 843 if (r->rule_flag & PFRULE_SRCTRACK) 844 opts = 1; 845 if (r->rule_flag & (PFRULE_IFBOUND | PFRULE_GRBOUND)) 846 opts = 1; 847 for (i = 0; !opts && i < PFTM_MAX; ++i) 848 if (r->timeout[i]) 849 opts = 1; 850 if (opts) { 851 printf(" ("); 852 if (r->max_states) { 853 printf("max %u", r->max_states); 854 opts = 0; 855 } 856 if (r->rule_flag & PFRULE_NOSYNC) { 857 if (!opts) 858 printf(", "); 859 printf("no-sync"); 860 opts = 0; 861 } 862 if (r->rule_flag & PFRULE_SRCTRACK) { 863 if (!opts) 864 printf(", "); 865 printf("source-track"); 866 if (r->rule_flag & PFRULE_RULESRCTRACK) 867 printf(" rule"); 868 else 869 printf(" global"); 870 opts = 0; 871 } 872 if (r->max_src_states) { 873 if (!opts) 874 printf(", "); 875 printf("max-src-states %u", r->max_src_states); 876 opts = 0; 877 } 878 if (r->max_src_nodes) { 879 if (!opts) 880 printf(", "); 881 printf("max-src-nodes %u", r->max_src_nodes); 882 opts = 0; 883 } 884 if (r->rule_flag & PFRULE_IFBOUND) { 885 if (!opts) 886 printf(", "); 887 printf("if-bound"); 888 opts = 0; 889 } 890 if (r->rule_flag & PFRULE_GRBOUND) { 891 if (!opts) 892 printf(", "); 893 printf("group-bound"); 894 opts = 0; 895 } 896 for (i = 0; i < PFTM_MAX; ++i) 897 if (r->timeout[i]) { 898 int j; 899 900 if (!opts) 901 printf(", "); 902 opts = 0; 903 for (j = 0; j < sizeof(pf_timeouts) / 904 sizeof(pf_timeouts[0]); ++j) 905 if (pf_timeouts[j].timeout == i) 906 break; 907 printf("%s %u", j == PFTM_MAX ? "inv.timeout" : 908 pf_timeouts[j].name, r->timeout[i]); 909 } 910 printf(")"); 911 } 912 if (r->rule_flag & PFRULE_FRAGMENT) 913 printf(" fragment"); 914 if (r->rule_flag & PFRULE_NODF) 915 printf(" no-df"); 916 if (r->rule_flag & PFRULE_RANDOMID) 917 printf(" random-id"); 918 if (r->min_ttl) 919 printf(" min-ttl %d", r->min_ttl); 920 if (r->max_mss) 921 printf(" max-mss %d", r->max_mss); 922 if (r->allow_opts) 923 printf(" allow-opts"); 924 if (r->action == PF_SCRUB) { 925 if (r->rule_flag & PFRULE_REASSEMBLE_TCP) 926 printf(" reassemble tcp"); 927 928 if (r->rule_flag & PFRULE_FRAGDROP) 929 printf(" fragment drop-ovl"); 930 else if (r->rule_flag & PFRULE_FRAGCROP) 931 printf(" fragment crop"); 932 else 933 printf(" fragment reassemble"); 934 } 935 if (r->label[0]) 936 printf(" label \"%s\"", r->label); 937 if (r->qname[0] && r->pqname[0]) 938 printf(" queue(%s, %s)", r->qname, r->pqname); 939 else if (r->qname[0]) 940 printf(" queue %s", r->qname); 941 if (r->tagname[0]) 942 printf(" tag %s", r->tagname); 943 if (r->match_tagname[0]) { 944 if (r->match_tag_not) 945 printf(" !"); 946 printf(" tagged %s", r->match_tagname); 947 } 948 if (!anchor_call[0] && (r->action == PF_NAT || 949 r->action == PF_BINAT || r->action == PF_RDR)) { 950 printf(" -> "); 951 print_pool(&r->rpool, r->rpool.proxy_port[0], 952 r->rpool.proxy_port[1], r->af, r->action); 953 } 954 printf("\n"); 955 } 956 957 void 958 print_tabledef(const char *name, int flags, int addrs, 959 struct node_tinithead *nodes) 960 { 961 struct node_tinit *ti, *nti; 962 struct node_host *h; 963 964 printf("table <%s>", name); 965 if (flags & PFR_TFLAG_CONST) 966 printf(" const"); 967 if (flags & PFR_TFLAG_PERSIST) 968 printf(" persist"); 969 SIMPLEQ_FOREACH(ti, nodes, entries) { 970 if (ti->file) { 971 printf(" file \"%s\"", ti->file); 972 continue; 973 } 974 printf(" {"); 975 for (;;) { 976 for (h = ti->host; h != NULL; h = h->next) { 977 printf(h->not ? " !" : " "); 978 print_addr(&h->addr, h->af, 0); 979 } 980 nti = SIMPLEQ_NEXT(ti, entries); 981 if (nti != NULL && nti->file == NULL) 982 ti = nti; /* merge lists */ 983 else 984 break; 985 } 986 printf(" }"); 987 } 988 if (addrs && SIMPLEQ_EMPTY(nodes)) 989 printf(" { }"); 990 printf("\n"); 991 } 992 993 int 994 parse_flags(char *s) 995 { 996 char *p, *q; 997 u_int8_t f = 0; 998 999 for (p = s; *p; p++) { 1000 if ((q = strchr(tcpflags, *p)) == NULL) 1001 return -1; 1002 else 1003 f |= 1 << (q - tcpflags); 1004 } 1005 return (f ? f : PF_TH_ALL); 1006 } 1007 1008 void 1009 set_ipmask(struct node_host *h, u_int8_t b) 1010 { 1011 struct pf_addr *m, *n; 1012 int i, j = 0; 1013 1014 m = &h->addr.v.a.mask; 1015 memset(m, 0, sizeof(*m)); 1016 1017 while (b >= 32) { 1018 m->addr32[j++] = 0xffffffff; 1019 b -= 32; 1020 } 1021 for (i = 31; i > 31-b; --i) 1022 m->addr32[j] |= (1 << i); 1023 if (b) 1024 m->addr32[j] = htonl(m->addr32[j]); 1025 1026 /* Mask off bits of the address that will never be used. */ 1027 n = &h->addr.v.a.addr; 1028 if (h->addr.type == PF_ADDR_ADDRMASK) 1029 for (i = 0; i < 4; i++) 1030 n->addr32[i] = n->addr32[i] & m->addr32[i]; 1031 } 1032 1033 int 1034 check_netmask(struct node_host *h, sa_family_t af) 1035 { 1036 struct node_host *n = NULL; 1037 struct pf_addr *m; 1038 1039 for (n = h; n != NULL; n = n->next) { 1040 if (h->addr.type == PF_ADDR_TABLE) 1041 continue; 1042 m = &h->addr.v.a.mask; 1043 /* fix up netmask for dynaddr */ 1044 if (af == AF_INET && h->addr.type == PF_ADDR_DYNIFTL && 1045 unmask(m, AF_INET6) > 32) 1046 set_ipmask(n, 32); 1047 /* netmasks > 32 bit are invalid on v4 */ 1048 if (af == AF_INET && 1049 (m->addr32[1] || m->addr32[2] || m->addr32[3])) { 1050 fprintf(stderr, "netmask %u invalid for IPv4 address\n", 1051 unmask(m, AF_INET6)); 1052 return (1); 1053 } 1054 } 1055 return (0); 1056 } 1057 1058 /* interface lookup routines */ 1059 1060 struct node_host *iftab; 1061 1062 void 1063 ifa_load(void) 1064 { 1065 struct ifaddrs *ifap, *ifa; 1066 struct node_host *n = NULL, *h = NULL; 1067 1068 if (getifaddrs(&ifap) < 0) 1069 err(1, "getifaddrs"); 1070 1071 for (ifa = ifap; ifa; ifa = ifa->ifa_next) { 1072 if (!(ifa->ifa_addr->sa_family == AF_INET || 1073 ifa->ifa_addr->sa_family == AF_INET6 || 1074 ifa->ifa_addr->sa_family == AF_LINK)) 1075 continue; 1076 n = calloc(1, sizeof(struct node_host)); 1077 if (n == NULL) 1078 err(1, "address: calloc"); 1079 n->af = ifa->ifa_addr->sa_family; 1080 n->ifa_flags = ifa->ifa_flags; 1081 #ifdef __KAME__ 1082 if (n->af == AF_INET6 && 1083 IN6_IS_ADDR_LINKLOCAL(&((struct sockaddr_in6 *) 1084 ifa->ifa_addr)->sin6_addr) && 1085 ((struct sockaddr_in6 *)ifa->ifa_addr)->sin6_scope_id == 1086 0) { 1087 struct sockaddr_in6 *sin6; 1088 1089 sin6 = (struct sockaddr_in6 *)ifa->ifa_addr; 1090 sin6->sin6_scope_id = sin6->sin6_addr.s6_addr[2] << 8 | 1091 sin6->sin6_addr.s6_addr[3]; 1092 sin6->sin6_addr.s6_addr[2] = 0; 1093 sin6->sin6_addr.s6_addr[3] = 0; 1094 } 1095 #endif 1096 n->ifindex = 0; 1097 if (n->af == AF_INET) { 1098 memcpy(&n->addr.v.a.addr, &((struct sockaddr_in *) 1099 ifa->ifa_addr)->sin_addr.s_addr, 1100 sizeof(struct in_addr)); 1101 memcpy(&n->addr.v.a.mask, &((struct sockaddr_in *) 1102 ifa->ifa_netmask)->sin_addr.s_addr, 1103 sizeof(struct in_addr)); 1104 if (ifa->ifa_broadaddr != NULL) 1105 memcpy(&n->bcast, &((struct sockaddr_in *) 1106 ifa->ifa_broadaddr)->sin_addr.s_addr, 1107 sizeof(struct in_addr)); 1108 if (ifa->ifa_dstaddr != NULL) 1109 memcpy(&n->peer, &((struct sockaddr_in *) 1110 ifa->ifa_dstaddr)->sin_addr.s_addr, 1111 sizeof(struct in_addr)); 1112 } else if (n->af == AF_INET6) { 1113 memcpy(&n->addr.v.a.addr, &((struct sockaddr_in6 *) 1114 ifa->ifa_addr)->sin6_addr.s6_addr, 1115 sizeof(struct in6_addr)); 1116 memcpy(&n->addr.v.a.mask, &((struct sockaddr_in6 *) 1117 ifa->ifa_netmask)->sin6_addr.s6_addr, 1118 sizeof(struct in6_addr)); 1119 if (ifa->ifa_broadaddr != NULL) 1120 memcpy(&n->bcast, &((struct sockaddr_in6 *) 1121 ifa->ifa_broadaddr)->sin6_addr.s6_addr, 1122 sizeof(struct in6_addr)); 1123 if (ifa->ifa_dstaddr != NULL) 1124 memcpy(&n->peer, &((struct sockaddr_in6 *) 1125 ifa->ifa_dstaddr)->sin6_addr.s6_addr, 1126 sizeof(struct in6_addr)); 1127 n->ifindex = ((struct sockaddr_in6 *) 1128 ifa->ifa_addr)->sin6_scope_id; 1129 } 1130 if ((n->ifname = strdup(ifa->ifa_name)) == NULL) 1131 err(1, "ifa_load: strdup"); 1132 n->next = NULL; 1133 n->tail = n; 1134 if (h == NULL) 1135 h = n; 1136 else { 1137 h->tail->next = n; 1138 h->tail = n; 1139 } 1140 } 1141 1142 iftab = h; 1143 freeifaddrs(ifap); 1144 } 1145 1146 struct node_host * 1147 ifa_exists(const char *ifa_name, int group_ok) 1148 { 1149 struct node_host *n; 1150 1151 if (iftab == NULL) 1152 ifa_load(); 1153 1154 for (n = iftab; n; n = n->next) { 1155 if (n->af == AF_LINK && !strncmp(n->ifname, ifa_name, IFNAMSIZ)) 1156 return (n); 1157 } 1158 1159 return (NULL); 1160 } 1161 1162 struct node_host * 1163 ifa_lookup(const char *ifa_name, int flags) 1164 { 1165 struct node_host *p = NULL, *h = NULL, *n = NULL; 1166 int got4 = 0, got6 = 0; 1167 const char *last_if = NULL; 1168 1169 if (!strncmp(ifa_name, "self", IFNAMSIZ)) 1170 ifa_name = NULL; 1171 1172 if (iftab == NULL) 1173 ifa_load(); 1174 1175 for (p = iftab; p; p = p->next) { 1176 if (ifa_skip_if(ifa_name, p)) 1177 continue; 1178 if ((flags & PFI_AFLAG_BROADCAST) && p->af != AF_INET) 1179 continue; 1180 if ((flags & PFI_AFLAG_BROADCAST) && 1181 !(p->ifa_flags & IFF_BROADCAST)) 1182 continue; 1183 if ((flags & PFI_AFLAG_PEER) && 1184 !(p->ifa_flags & IFF_POINTOPOINT)) 1185 continue; 1186 if ((flags & PFI_AFLAG_NETWORK) && p->ifindex > 0) 1187 continue; 1188 if (last_if == NULL || strcmp(last_if, p->ifname)) 1189 got4 = got6 = 0; 1190 last_if = p->ifname; 1191 if ((flags & PFI_AFLAG_NOALIAS) && p->af == AF_INET && got4) 1192 continue; 1193 if ((flags & PFI_AFLAG_NOALIAS) && p->af == AF_INET6 && got6) 1194 continue; 1195 if (p->af == AF_INET) 1196 got4 = 1; 1197 else 1198 got6 = 1; 1199 n = calloc(1, sizeof(struct node_host)); 1200 if (n == NULL) 1201 err(1, "address: calloc"); 1202 n->af = p->af; 1203 if (flags & PFI_AFLAG_BROADCAST) 1204 memcpy(&n->addr.v.a.addr, &p->bcast, 1205 sizeof(struct pf_addr)); 1206 else if (flags & PFI_AFLAG_PEER) 1207 memcpy(&n->addr.v.a.addr, &p->peer, 1208 sizeof(struct pf_addr)); 1209 else 1210 memcpy(&n->addr.v.a.addr, &p->addr.v.a.addr, 1211 sizeof(struct pf_addr)); 1212 if (flags & PFI_AFLAG_NETWORK) 1213 set_ipmask(n, unmask(&p->addr.v.a.mask, n->af)); 1214 else { 1215 if (n->af == AF_INET) { 1216 if (p->ifa_flags & IFF_LOOPBACK && 1217 p->ifa_flags & IFF_LINK1) 1218 memcpy(&n->addr.v.a.mask, 1219 &p->addr.v.a.mask, 1220 sizeof(struct pf_addr)); 1221 else 1222 set_ipmask(n, 32); 1223 } else 1224 set_ipmask(n, 128); 1225 } 1226 n->ifindex = p->ifindex; 1227 1228 n->next = NULL; 1229 n->tail = n; 1230 if (h == NULL) 1231 h = n; 1232 else { 1233 h->tail->next = n; 1234 h->tail = n; 1235 } 1236 } 1237 return (h); 1238 } 1239 1240 int 1241 ifa_skip_if(const char *filter, struct node_host *p) 1242 { 1243 int n; 1244 1245 if (p->af != AF_INET && p->af != AF_INET6) 1246 return (1); 1247 if (filter == NULL || !*filter) 1248 return (0); 1249 if (!strcmp(p->ifname, filter)) 1250 return (0); /* exact match */ 1251 n = strlen(filter); 1252 if (n < 1 || n >= IFNAMSIZ) 1253 return (1); /* sanity check */ 1254 if (filter[n-1] >= '0' && filter[n-1] <= '9') 1255 return (1); /* only do exact match in that case */ 1256 if (strncmp(p->ifname, filter, n)) 1257 return (1); /* prefix doesn't match */ 1258 return (p->ifname[n] < '0' || p->ifname[n] > '9'); 1259 } 1260 1261 1262 struct node_host * 1263 host(const char *s) 1264 { 1265 struct node_host *h = NULL; 1266 int mask, v4mask, v6mask, cont = 1; 1267 char *p, *q, *ps; 1268 1269 if ((p = strrchr(s, '/')) != NULL) { 1270 mask = strtol(p+1, &q, 0); 1271 if (!q || *q || mask > 128 || q == (p+1)) { 1272 fprintf(stderr, "invalid netmask\n"); 1273 return (NULL); 1274 } 1275 if ((ps = malloc(strlen(s) - strlen(p) + 1)) == NULL) 1276 err(1, "host: malloc"); 1277 strlcpy(ps, s, strlen(s) - strlen(p) + 1); 1278 v4mask = v6mask = mask; 1279 } else { 1280 if ((ps = strdup(s)) == NULL) 1281 err(1, "host: strdup"); 1282 v4mask = 32; 1283 v6mask = 128; 1284 mask = -1; 1285 } 1286 1287 /* interface with this name exists? */ 1288 if (cont && (h = host_if(ps, mask)) != NULL) 1289 cont = 0; 1290 1291 /* IPv4 address? */ 1292 if (cont && (h = host_v4(s, mask)) != NULL) 1293 cont = 0; 1294 1295 /* IPv6 address? */ 1296 if (cont && (h = host_v6(ps, v6mask)) != NULL) 1297 cont = 0; 1298 1299 /* dns lookup */ 1300 if (cont && (h = host_dns(ps, v4mask, v6mask)) != NULL) 1301 cont = 0; 1302 free(ps); 1303 1304 if (h == NULL || cont == 1) { 1305 fprintf(stderr, "no IP address found for %s\n", s); 1306 return (NULL); 1307 } 1308 return (h); 1309 } 1310 1311 struct node_host * 1312 host_if(const char *s, int mask) 1313 { 1314 struct node_host *n, *h = NULL; 1315 char *p, *ps; 1316 int flags = 0; 1317 1318 if ((ps = strdup(s)) == NULL) 1319 err(1, "host_if: strdup"); 1320 while ((p = strrchr(ps, ':')) != NULL) { 1321 if (!strcmp(p+1, "network")) 1322 flags |= PFI_AFLAG_NETWORK; 1323 else if (!strcmp(p+1, "broadcast")) 1324 flags |= PFI_AFLAG_BROADCAST; 1325 else if (!strcmp(p+1, "peer")) 1326 flags |= PFI_AFLAG_PEER; 1327 else if (!strcmp(p+1, "0")) 1328 flags |= PFI_AFLAG_NOALIAS; 1329 else { 1330 free(ps); 1331 return (NULL); 1332 } 1333 *p = '\0'; 1334 } 1335 if (flags & (flags - 1) & PFI_AFLAG_MODEMASK) { /* Yep! */ 1336 fprintf(stderr, "illegal combination of interface modifiers\n"); 1337 free(ps); 1338 return (NULL); 1339 } 1340 if ((flags & (PFI_AFLAG_NETWORK|PFI_AFLAG_BROADCAST)) && mask > -1) { 1341 fprintf(stderr, "network or broadcast lookup, but " 1342 "extra netmask given\n"); 1343 free(ps); 1344 return (NULL); 1345 } 1346 if (ifa_exists(ps, 1) || !strncmp(ps, "self", IFNAMSIZ)) { 1347 /* interface with this name exists */ 1348 h = ifa_lookup(ps, flags); 1349 for (n = h; n != NULL && mask > -1; n = n->next) 1350 set_ipmask(n, mask); 1351 } 1352 1353 free(ps); 1354 return (h); 1355 } 1356 1357 struct node_host * 1358 host_v4(const char *s, int mask) 1359 { 1360 struct node_host *h = NULL; 1361 struct in_addr ina; 1362 int bits = 32; 1363 1364 memset(&ina, 0, sizeof(struct in_addr)); 1365 if (strrchr(s, '/') != NULL) { 1366 if ((bits = inet_net_pton(AF_INET, s, &ina, sizeof(ina))) == -1) 1367 return (NULL); 1368 } else { 1369 if (inet_pton(AF_INET, s, &ina) != 1) 1370 return (NULL); 1371 } 1372 1373 h = calloc(1, sizeof(struct node_host)); 1374 if (h == NULL) 1375 err(1, "address: calloc"); 1376 h->ifname = NULL; 1377 h->af = AF_INET; 1378 h->addr.v.a.addr.addr32[0] = ina.s_addr; 1379 set_ipmask(h, bits); 1380 h->next = NULL; 1381 h->tail = h; 1382 1383 return (h); 1384 } 1385 1386 struct node_host * 1387 host_v6(const char *s, int mask) 1388 { 1389 struct addrinfo hints, *res; 1390 struct node_host *h = NULL; 1391 1392 memset(&hints, 0, sizeof(hints)); 1393 hints.ai_family = AF_INET6; 1394 hints.ai_socktype = SOCK_DGRAM; /*dummy*/ 1395 hints.ai_flags = AI_NUMERICHOST; 1396 if (getaddrinfo(s, "0", &hints, &res) == 0) { 1397 h = calloc(1, sizeof(struct node_host)); 1398 if (h == NULL) 1399 err(1, "address: calloc"); 1400 h->ifname = NULL; 1401 h->af = AF_INET6; 1402 memcpy(&h->addr.v.a.addr, 1403 &((struct sockaddr_in6 *)res->ai_addr)->sin6_addr, 1404 sizeof(h->addr.v.a.addr)); 1405 h->ifindex = 1406 ((struct sockaddr_in6 *)res->ai_addr)->sin6_scope_id; 1407 set_ipmask(h, mask); 1408 freeaddrinfo(res); 1409 h->next = NULL; 1410 h->tail = h; 1411 } 1412 1413 return (h); 1414 } 1415 1416 struct node_host * 1417 host_dns(const char *s, int v4mask, int v6mask) 1418 { 1419 struct addrinfo hints, *res0, *res; 1420 struct node_host *n, *h = NULL; 1421 int error, noalias = 0; 1422 int got4 = 0, got6 = 0; 1423 char *p, *ps; 1424 1425 if ((ps = strdup(s)) == NULL) 1426 err(1, "host_dns: strdup"); 1427 if ((p = strrchr(ps, ':')) != NULL && !strcmp(p, ":0")) { 1428 noalias = 1; 1429 *p = '\0'; 1430 } 1431 memset(&hints, 0, sizeof(hints)); 1432 hints.ai_family = PF_UNSPEC; 1433 hints.ai_socktype = SOCK_STREAM; /* DUMMY */ 1434 error = getaddrinfo(ps, NULL, &hints, &res0); 1435 if (error) { 1436 free(ps); 1437 return (h); 1438 } 1439 1440 for (res = res0; res; res = res->ai_next) { 1441 if (res->ai_family != AF_INET && 1442 res->ai_family != AF_INET6) 1443 continue; 1444 if (noalias) { 1445 if (res->ai_family == AF_INET) { 1446 if (got4) 1447 continue; 1448 got4 = 1; 1449 } else { 1450 if (got6) 1451 continue; 1452 got6 = 1; 1453 } 1454 } 1455 n = calloc(1, sizeof(struct node_host)); 1456 if (n == NULL) 1457 err(1, "host_dns: calloc"); 1458 n->ifname = NULL; 1459 n->af = res->ai_family; 1460 if (res->ai_family == AF_INET) { 1461 memcpy(&n->addr.v.a.addr, 1462 &((struct sockaddr_in *) 1463 res->ai_addr)->sin_addr.s_addr, 1464 sizeof(struct in_addr)); 1465 set_ipmask(n, v4mask); 1466 } else { 1467 memcpy(&n->addr.v.a.addr, 1468 &((struct sockaddr_in6 *) 1469 res->ai_addr)->sin6_addr.s6_addr, 1470 sizeof(struct in6_addr)); 1471 n->ifindex = 1472 ((struct sockaddr_in6 *) 1473 res->ai_addr)->sin6_scope_id; 1474 set_ipmask(n, v6mask); 1475 } 1476 n->next = NULL; 1477 n->tail = n; 1478 if (h == NULL) 1479 h = n; 1480 else { 1481 h->tail->next = n; 1482 h->tail = n; 1483 } 1484 } 1485 freeaddrinfo(res0); 1486 free(ps); 1487 1488 return (h); 1489 } 1490 1491 /* 1492 * convert a hostname to a list of addresses and put them in the given buffer. 1493 * test: 1494 * if set to 1, only simple addresses are accepted (no netblock, no "!"). 1495 */ 1496 int 1497 append_addr(struct pfr_buffer *b, char *s, int test) 1498 { 1499 char *r; 1500 struct node_host *h, *n; 1501 int rv, not = 0; 1502 1503 for (r = s; *r == '!'; r++) 1504 not = !not; 1505 if ((n = host(r)) == NULL) { 1506 errno = 0; 1507 return (-1); 1508 } 1509 rv = append_addr_host(b, n, test, not); 1510 do { 1511 h = n; 1512 n = n->next; 1513 free(h); 1514 } while (n != NULL); 1515 return (rv); 1516 } 1517 1518 /* 1519 * same as previous function, but with a pre-parsed input and the ability 1520 * to "negate" the result. Does not free the node_host list. 1521 * not: 1522 * setting it to 1 is equivalent to adding "!" in front of parameter s. 1523 */ 1524 int 1525 append_addr_host(struct pfr_buffer *b, struct node_host *n, int test, int not) 1526 { 1527 int bits; 1528 struct pfr_addr addr; 1529 1530 do { 1531 bzero(&addr, sizeof(addr)); 1532 addr.pfra_not = n->not ^ not; 1533 addr.pfra_af = n->af; 1534 addr.pfra_net = unmask(&n->addr.v.a.mask, n->af); 1535 switch (n->af) { 1536 case AF_INET: 1537 addr.pfra_ip4addr.s_addr = n->addr.v.a.addr.addr32[0]; 1538 bits = 32; 1539 break; 1540 case AF_INET6: 1541 memcpy(&addr.pfra_ip6addr, &n->addr.v.a.addr.v6, 1542 sizeof(struct in6_addr)); 1543 bits = 128; 1544 break; 1545 default: 1546 errno = EINVAL; 1547 return (-1); 1548 } 1549 if ((test && (not || addr.pfra_net != bits)) || 1550 addr.pfra_net > bits) { 1551 errno = EINVAL; 1552 return (-1); 1553 } 1554 if (pfr_buf_add(b, &addr)) 1555 return (-1); 1556 } while ((n = n->next) != NULL); 1557 1558 return (0); 1559 } 1560 1561 int 1562 pfctl_add_trans(struct pfr_buffer *buf, int rs_num, const char *anchor) 1563 { 1564 struct pfioc_trans_e trans; 1565 1566 bzero(&trans, sizeof(trans)); 1567 trans.rs_num = rs_num; 1568 if (strlcpy(trans.anchor, anchor, 1569 sizeof(trans.anchor)) >= sizeof(trans.anchor)) 1570 errx(1, "pfctl_add_trans: strlcpy"); 1571 1572 return pfr_buf_add(buf, &trans); 1573 } 1574 1575 u_int32_t 1576 pfctl_get_ticket(struct pfr_buffer *buf, int rs_num, const char *anchor) 1577 { 1578 struct pfioc_trans_e *p; 1579 1580 PFRB_FOREACH(p, buf) 1581 if (rs_num == p->rs_num && !strcmp(anchor, p->anchor)) 1582 return (p->ticket); 1583 errx(1, "pfctl_get_ticket: assertion failed"); 1584 } 1585 1586 int 1587 pfctl_trans(int dev, struct pfr_buffer *buf, u_long cmd, int from) 1588 { 1589 struct pfioc_trans trans; 1590 1591 bzero(&trans, sizeof(trans)); 1592 trans.size = buf->pfrb_size - from; 1593 trans.esize = sizeof(struct pfioc_trans_e); 1594 trans.array = ((struct pfioc_trans_e *)buf->pfrb_caddr) + from; 1595 return ioctl(dev, cmd, &trans); 1596 } 1597