1 /* $NetBSD: pfctl_parser.c,v 1.5 2004/11/14 11:26:48 yamt Exp $ */ 2 /* $OpenBSD: pfctl_parser.c,v 1.203 2004/07/16 23:44:25 frantzen 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 if (!opts) 899 printf(", "); 900 opts = 0; 901 printf("%s %u", pf_timeouts[i].name, 902 r->timeout[i]); 903 } 904 printf(")"); 905 } 906 if (r->rule_flag & PFRULE_FRAGMENT) 907 printf(" fragment"); 908 if (r->rule_flag & PFRULE_NODF) 909 printf(" no-df"); 910 if (r->rule_flag & PFRULE_RANDOMID) 911 printf(" random-id"); 912 if (r->min_ttl) 913 printf(" min-ttl %d", r->min_ttl); 914 if (r->max_mss) 915 printf(" max-mss %d", r->max_mss); 916 if (r->allow_opts) 917 printf(" allow-opts"); 918 if (r->action == PF_SCRUB) { 919 if (r->rule_flag & PFRULE_REASSEMBLE_TCP) 920 printf(" reassemble tcp"); 921 922 if (r->rule_flag & PFRULE_FRAGDROP) 923 printf(" fragment drop-ovl"); 924 else if (r->rule_flag & PFRULE_FRAGCROP) 925 printf(" fragment crop"); 926 else 927 printf(" fragment reassemble"); 928 } 929 if (r->label[0]) 930 printf(" label \"%s\"", r->label); 931 if (r->qname[0] && r->pqname[0]) 932 printf(" queue(%s, %s)", r->qname, r->pqname); 933 else if (r->qname[0]) 934 printf(" queue %s", r->qname); 935 if (r->tagname[0]) 936 printf(" tag %s", r->tagname); 937 if (r->match_tagname[0]) { 938 if (r->match_tag_not) 939 printf(" !"); 940 printf(" tagged %s", r->match_tagname); 941 } 942 if (!anchor_call[0] && (r->action == PF_NAT || 943 r->action == PF_BINAT || r->action == PF_RDR)) { 944 printf(" -> "); 945 print_pool(&r->rpool, r->rpool.proxy_port[0], 946 r->rpool.proxy_port[1], r->af, r->action); 947 } 948 printf("\n"); 949 } 950 951 void 952 print_tabledef(const char *name, int flags, int addrs, 953 struct node_tinithead *nodes) 954 { 955 struct node_tinit *ti, *nti; 956 struct node_host *h; 957 958 printf("table <%s>", name); 959 if (flags & PFR_TFLAG_CONST) 960 printf(" const"); 961 if (flags & PFR_TFLAG_PERSIST) 962 printf(" persist"); 963 SIMPLEQ_FOREACH(ti, nodes, entries) { 964 if (ti->file) { 965 printf(" file \"%s\"", ti->file); 966 continue; 967 } 968 printf(" {"); 969 for (;;) { 970 for (h = ti->host; h != NULL; h = h->next) { 971 printf(h->not ? " !" : " "); 972 print_addr(&h->addr, h->af, 0); 973 } 974 nti = SIMPLEQ_NEXT(ti, entries); 975 if (nti != NULL && nti->file == NULL) 976 ti = nti; /* merge lists */ 977 else 978 break; 979 } 980 printf(" }"); 981 } 982 if (addrs && SIMPLEQ_EMPTY(nodes)) 983 printf(" { }"); 984 printf("\n"); 985 } 986 987 int 988 parse_flags(char *s) 989 { 990 char *p, *q; 991 u_int8_t f = 0; 992 993 for (p = s; *p; p++) { 994 if ((q = strchr(tcpflags, *p)) == NULL) 995 return -1; 996 else 997 f |= 1 << (q - tcpflags); 998 } 999 return (f ? f : PF_TH_ALL); 1000 } 1001 1002 void 1003 set_ipmask(struct node_host *h, u_int8_t b) 1004 { 1005 struct pf_addr *m, *n; 1006 int i, j = 0; 1007 1008 m = &h->addr.v.a.mask; 1009 memset(m, 0, sizeof(*m)); 1010 1011 while (b >= 32) { 1012 m->addr32[j++] = 0xffffffff; 1013 b -= 32; 1014 } 1015 for (i = 31; i > 31-b; --i) 1016 m->addr32[j] |= (1 << i); 1017 if (b) 1018 m->addr32[j] = htonl(m->addr32[j]); 1019 1020 /* Mask off bits of the address that will never be used. */ 1021 n = &h->addr.v.a.addr; 1022 if (h->addr.type == PF_ADDR_ADDRMASK) 1023 for (i = 0; i < 4; i++) 1024 n->addr32[i] = n->addr32[i] & m->addr32[i]; 1025 } 1026 1027 int 1028 check_netmask(struct node_host *h, sa_family_t af) 1029 { 1030 struct node_host *n = NULL; 1031 struct pf_addr *m; 1032 1033 for (n = h; n != NULL; n = n->next) { 1034 if (h->addr.type == PF_ADDR_TABLE) 1035 continue; 1036 m = &h->addr.v.a.mask; 1037 /* fix up netmask for dynaddr */ 1038 if (af == AF_INET && h->addr.type == PF_ADDR_DYNIFTL && 1039 unmask(m, AF_INET6) > 32) 1040 set_ipmask(n, 32); 1041 /* netmasks > 32 bit are invalid on v4 */ 1042 if (af == AF_INET && 1043 (m->addr32[1] || m->addr32[2] || m->addr32[3])) { 1044 fprintf(stderr, "netmask %u invalid for IPv4 address\n", 1045 unmask(m, AF_INET6)); 1046 return (1); 1047 } 1048 } 1049 return (0); 1050 } 1051 1052 /* interface lookup routines */ 1053 1054 struct node_host *iftab; 1055 1056 void 1057 ifa_load(void) 1058 { 1059 struct ifaddrs *ifap, *ifa; 1060 struct node_host *n = NULL, *h = NULL; 1061 1062 if (getifaddrs(&ifap) < 0) 1063 err(1, "getifaddrs"); 1064 1065 for (ifa = ifap; ifa; ifa = ifa->ifa_next) { 1066 if (!(ifa->ifa_addr->sa_family == AF_INET || 1067 ifa->ifa_addr->sa_family == AF_INET6 || 1068 ifa->ifa_addr->sa_family == AF_LINK)) 1069 continue; 1070 n = calloc(1, sizeof(struct node_host)); 1071 if (n == NULL) 1072 err(1, "address: calloc"); 1073 n->af = ifa->ifa_addr->sa_family; 1074 n->ifa_flags = ifa->ifa_flags; 1075 #ifdef __KAME__ 1076 if (n->af == AF_INET6 && 1077 IN6_IS_ADDR_LINKLOCAL(&((struct sockaddr_in6 *) 1078 ifa->ifa_addr)->sin6_addr) && 1079 ((struct sockaddr_in6 *)ifa->ifa_addr)->sin6_scope_id == 1080 0) { 1081 struct sockaddr_in6 *sin6; 1082 1083 sin6 = (struct sockaddr_in6 *)ifa->ifa_addr; 1084 sin6->sin6_scope_id = sin6->sin6_addr.s6_addr[2] << 8 | 1085 sin6->sin6_addr.s6_addr[3]; 1086 sin6->sin6_addr.s6_addr[2] = 0; 1087 sin6->sin6_addr.s6_addr[3] = 0; 1088 } 1089 #endif 1090 n->ifindex = 0; 1091 if (n->af == AF_INET) { 1092 memcpy(&n->addr.v.a.addr, &((struct sockaddr_in *) 1093 ifa->ifa_addr)->sin_addr.s_addr, 1094 sizeof(struct in_addr)); 1095 memcpy(&n->addr.v.a.mask, &((struct sockaddr_in *) 1096 ifa->ifa_netmask)->sin_addr.s_addr, 1097 sizeof(struct in_addr)); 1098 if (ifa->ifa_broadaddr != NULL) 1099 memcpy(&n->bcast, &((struct sockaddr_in *) 1100 ifa->ifa_broadaddr)->sin_addr.s_addr, 1101 sizeof(struct in_addr)); 1102 if (ifa->ifa_dstaddr != NULL) 1103 memcpy(&n->peer, &((struct sockaddr_in *) 1104 ifa->ifa_dstaddr)->sin_addr.s_addr, 1105 sizeof(struct in_addr)); 1106 } else if (n->af == AF_INET6) { 1107 memcpy(&n->addr.v.a.addr, &((struct sockaddr_in6 *) 1108 ifa->ifa_addr)->sin6_addr.s6_addr, 1109 sizeof(struct in6_addr)); 1110 memcpy(&n->addr.v.a.mask, &((struct sockaddr_in6 *) 1111 ifa->ifa_netmask)->sin6_addr.s6_addr, 1112 sizeof(struct in6_addr)); 1113 if (ifa->ifa_broadaddr != NULL) 1114 memcpy(&n->bcast, &((struct sockaddr_in6 *) 1115 ifa->ifa_broadaddr)->sin6_addr.s6_addr, 1116 sizeof(struct in6_addr)); 1117 if (ifa->ifa_dstaddr != NULL) 1118 memcpy(&n->peer, &((struct sockaddr_in6 *) 1119 ifa->ifa_dstaddr)->sin6_addr.s6_addr, 1120 sizeof(struct in6_addr)); 1121 n->ifindex = ((struct sockaddr_in6 *) 1122 ifa->ifa_addr)->sin6_scope_id; 1123 } 1124 if ((n->ifname = strdup(ifa->ifa_name)) == NULL) 1125 err(1, "ifa_load: strdup"); 1126 n->next = NULL; 1127 n->tail = n; 1128 if (h == NULL) 1129 h = n; 1130 else { 1131 h->tail->next = n; 1132 h->tail = n; 1133 } 1134 } 1135 1136 iftab = h; 1137 freeifaddrs(ifap); 1138 } 1139 1140 struct node_host * 1141 ifa_exists(const char *ifa_name, int group_ok) 1142 { 1143 struct node_host *n; 1144 1145 if (iftab == NULL) 1146 ifa_load(); 1147 1148 for (n = iftab; n; n = n->next) { 1149 if (n->af == AF_LINK && !strncmp(n->ifname, ifa_name, IFNAMSIZ)) 1150 return (n); 1151 } 1152 1153 return (NULL); 1154 } 1155 1156 struct node_host * 1157 ifa_lookup(const char *ifa_name, int flags) 1158 { 1159 struct node_host *p = NULL, *h = NULL, *n = NULL; 1160 int got4 = 0, got6 = 0; 1161 const char *last_if = NULL; 1162 1163 if (!strncmp(ifa_name, "self", IFNAMSIZ)) 1164 ifa_name = NULL; 1165 1166 if (iftab == NULL) 1167 ifa_load(); 1168 1169 for (p = iftab; p; p = p->next) { 1170 if (ifa_skip_if(ifa_name, p)) 1171 continue; 1172 if ((flags & PFI_AFLAG_BROADCAST) && p->af != AF_INET) 1173 continue; 1174 if ((flags & PFI_AFLAG_BROADCAST) && 1175 !(p->ifa_flags & IFF_BROADCAST)) 1176 continue; 1177 if ((flags & PFI_AFLAG_PEER) && 1178 !(p->ifa_flags & IFF_POINTOPOINT)) 1179 continue; 1180 if ((flags & PFI_AFLAG_NETWORK) && p->ifindex > 0) 1181 continue; 1182 if (last_if == NULL || strcmp(last_if, p->ifname)) 1183 got4 = got6 = 0; 1184 last_if = p->ifname; 1185 if ((flags & PFI_AFLAG_NOALIAS) && p->af == AF_INET && got4) 1186 continue; 1187 if ((flags & PFI_AFLAG_NOALIAS) && p->af == AF_INET6 && got6) 1188 continue; 1189 if (p->af == AF_INET) 1190 got4 = 1; 1191 else 1192 got6 = 1; 1193 n = calloc(1, sizeof(struct node_host)); 1194 if (n == NULL) 1195 err(1, "address: calloc"); 1196 n->af = p->af; 1197 if (flags & PFI_AFLAG_BROADCAST) 1198 memcpy(&n->addr.v.a.addr, &p->bcast, 1199 sizeof(struct pf_addr)); 1200 else if (flags & PFI_AFLAG_PEER) 1201 memcpy(&n->addr.v.a.addr, &p->peer, 1202 sizeof(struct pf_addr)); 1203 else 1204 memcpy(&n->addr.v.a.addr, &p->addr.v.a.addr, 1205 sizeof(struct pf_addr)); 1206 if (flags & PFI_AFLAG_NETWORK) 1207 set_ipmask(n, unmask(&p->addr.v.a.mask, n->af)); 1208 else { 1209 if (n->af == AF_INET) { 1210 if (p->ifa_flags & IFF_LOOPBACK && 1211 p->ifa_flags & IFF_LINK1) 1212 memcpy(&n->addr.v.a.mask, 1213 &p->addr.v.a.mask, 1214 sizeof(struct pf_addr)); 1215 else 1216 set_ipmask(n, 32); 1217 } else 1218 set_ipmask(n, 128); 1219 } 1220 n->ifindex = p->ifindex; 1221 1222 n->next = NULL; 1223 n->tail = n; 1224 if (h == NULL) 1225 h = n; 1226 else { 1227 h->tail->next = n; 1228 h->tail = n; 1229 } 1230 } 1231 return (h); 1232 } 1233 1234 int 1235 ifa_skip_if(const char *filter, struct node_host *p) 1236 { 1237 int n; 1238 1239 if (p->af != AF_INET && p->af != AF_INET6) 1240 return (1); 1241 if (filter == NULL || !*filter) 1242 return (0); 1243 if (!strcmp(p->ifname, filter)) 1244 return (0); /* exact match */ 1245 n = strlen(filter); 1246 if (n < 1 || n >= IFNAMSIZ) 1247 return (1); /* sanity check */ 1248 if (filter[n-1] >= '0' && filter[n-1] <= '9') 1249 return (1); /* only do exact match in that case */ 1250 if (strncmp(p->ifname, filter, n)) 1251 return (1); /* prefix doesn't match */ 1252 return (p->ifname[n] < '0' || p->ifname[n] > '9'); 1253 } 1254 1255 1256 struct node_host * 1257 host(const char *s) 1258 { 1259 struct node_host *h = NULL; 1260 int mask, v4mask, v6mask, cont = 1; 1261 char *p, *q, *ps; 1262 1263 if ((p = strrchr(s, '/')) != NULL) { 1264 mask = strtol(p+1, &q, 0); 1265 if (!q || *q || mask > 128 || q == (p+1)) { 1266 fprintf(stderr, "invalid netmask\n"); 1267 return (NULL); 1268 } 1269 if ((ps = malloc(strlen(s) - strlen(p) + 1)) == NULL) 1270 err(1, "host: malloc"); 1271 strlcpy(ps, s, strlen(s) - strlen(p) + 1); 1272 v4mask = v6mask = mask; 1273 } else { 1274 if ((ps = strdup(s)) == NULL) 1275 err(1, "host: strdup"); 1276 v4mask = 32; 1277 v6mask = 128; 1278 mask = -1; 1279 } 1280 1281 /* interface with this name exists? */ 1282 if (cont && (h = host_if(ps, mask)) != NULL) 1283 cont = 0; 1284 1285 /* IPv4 address? */ 1286 if (cont && (h = host_v4(s, mask)) != NULL) 1287 cont = 0; 1288 1289 /* IPv6 address? */ 1290 if (cont && (h = host_v6(ps, v6mask)) != NULL) 1291 cont = 0; 1292 1293 /* dns lookup */ 1294 if (cont && (h = host_dns(ps, v4mask, v6mask)) != NULL) 1295 cont = 0; 1296 free(ps); 1297 1298 if (h == NULL || cont == 1) { 1299 fprintf(stderr, "no IP address found for %s\n", s); 1300 return (NULL); 1301 } 1302 return (h); 1303 } 1304 1305 struct node_host * 1306 host_if(const char *s, int mask) 1307 { 1308 struct node_host *n, *h = NULL; 1309 char *p, *ps; 1310 int flags = 0; 1311 1312 if ((ps = strdup(s)) == NULL) 1313 err(1, "host_if: strdup"); 1314 while ((p = strrchr(ps, ':')) != NULL) { 1315 if (!strcmp(p+1, "network")) 1316 flags |= PFI_AFLAG_NETWORK; 1317 else if (!strcmp(p+1, "broadcast")) 1318 flags |= PFI_AFLAG_BROADCAST; 1319 else if (!strcmp(p+1, "peer")) 1320 flags |= PFI_AFLAG_PEER; 1321 else if (!strcmp(p+1, "0")) 1322 flags |= PFI_AFLAG_NOALIAS; 1323 else { 1324 free(ps); 1325 return (NULL); 1326 } 1327 *p = '\0'; 1328 } 1329 if (flags & (flags - 1) & PFI_AFLAG_MODEMASK) { /* Yep! */ 1330 fprintf(stderr, "illegal combination of interface modifiers\n"); 1331 free(ps); 1332 return (NULL); 1333 } 1334 if ((flags & (PFI_AFLAG_NETWORK|PFI_AFLAG_BROADCAST)) && mask > -1) { 1335 fprintf(stderr, "network or broadcast lookup, but " 1336 "extra netmask given\n"); 1337 free(ps); 1338 return (NULL); 1339 } 1340 if (ifa_exists(ps, 1) || !strncmp(ps, "self", IFNAMSIZ)) { 1341 /* interface with this name exists */ 1342 h = ifa_lookup(ps, flags); 1343 for (n = h; n != NULL && mask > -1; n = n->next) 1344 set_ipmask(n, mask); 1345 } 1346 1347 free(ps); 1348 return (h); 1349 } 1350 1351 struct node_host * 1352 host_v4(const char *s, int mask) 1353 { 1354 struct node_host *h = NULL; 1355 struct in_addr ina; 1356 int bits = 32; 1357 1358 memset(&ina, 0, sizeof(struct in_addr)); 1359 if (strrchr(s, '/') != NULL) { 1360 if ((bits = inet_net_pton(AF_INET, s, &ina, sizeof(ina))) == -1) 1361 return (NULL); 1362 } else { 1363 if (inet_pton(AF_INET, s, &ina) != 1) 1364 return (NULL); 1365 } 1366 1367 h = calloc(1, sizeof(struct node_host)); 1368 if (h == NULL) 1369 err(1, "address: calloc"); 1370 h->ifname = NULL; 1371 h->af = AF_INET; 1372 h->addr.v.a.addr.addr32[0] = ina.s_addr; 1373 set_ipmask(h, bits); 1374 h->next = NULL; 1375 h->tail = h; 1376 1377 return (h); 1378 } 1379 1380 struct node_host * 1381 host_v6(const char *s, int mask) 1382 { 1383 struct addrinfo hints, *res; 1384 struct node_host *h = NULL; 1385 1386 memset(&hints, 0, sizeof(hints)); 1387 hints.ai_family = AF_INET6; 1388 hints.ai_socktype = SOCK_DGRAM; /*dummy*/ 1389 hints.ai_flags = AI_NUMERICHOST; 1390 if (getaddrinfo(s, "0", &hints, &res) == 0) { 1391 h = calloc(1, sizeof(struct node_host)); 1392 if (h == NULL) 1393 err(1, "address: calloc"); 1394 h->ifname = NULL; 1395 h->af = AF_INET6; 1396 memcpy(&h->addr.v.a.addr, 1397 &((struct sockaddr_in6 *)res->ai_addr)->sin6_addr, 1398 sizeof(h->addr.v.a.addr)); 1399 h->ifindex = 1400 ((struct sockaddr_in6 *)res->ai_addr)->sin6_scope_id; 1401 set_ipmask(h, mask); 1402 freeaddrinfo(res); 1403 h->next = NULL; 1404 h->tail = h; 1405 } 1406 1407 return (h); 1408 } 1409 1410 struct node_host * 1411 host_dns(const char *s, int v4mask, int v6mask) 1412 { 1413 struct addrinfo hints, *res0, *res; 1414 struct node_host *n, *h = NULL; 1415 int error, noalias = 0; 1416 int got4 = 0, got6 = 0; 1417 char *p, *ps; 1418 1419 if ((ps = strdup(s)) == NULL) 1420 err(1, "host_dns: strdup"); 1421 if ((p = strrchr(ps, ':')) != NULL && !strcmp(p, ":0")) { 1422 noalias = 1; 1423 *p = '\0'; 1424 } 1425 memset(&hints, 0, sizeof(hints)); 1426 hints.ai_family = PF_UNSPEC; 1427 hints.ai_socktype = SOCK_STREAM; /* DUMMY */ 1428 error = getaddrinfo(ps, NULL, &hints, &res0); 1429 if (error) { 1430 free(ps); 1431 return (h); 1432 } 1433 1434 for (res = res0; res; res = res->ai_next) { 1435 if (res->ai_family != AF_INET && 1436 res->ai_family != AF_INET6) 1437 continue; 1438 if (noalias) { 1439 if (res->ai_family == AF_INET) { 1440 if (got4) 1441 continue; 1442 got4 = 1; 1443 } else { 1444 if (got6) 1445 continue; 1446 got6 = 1; 1447 } 1448 } 1449 n = calloc(1, sizeof(struct node_host)); 1450 if (n == NULL) 1451 err(1, "host_dns: calloc"); 1452 n->ifname = NULL; 1453 n->af = res->ai_family; 1454 if (res->ai_family == AF_INET) { 1455 memcpy(&n->addr.v.a.addr, 1456 &((struct sockaddr_in *) 1457 res->ai_addr)->sin_addr.s_addr, 1458 sizeof(struct in_addr)); 1459 set_ipmask(n, v4mask); 1460 } else { 1461 memcpy(&n->addr.v.a.addr, 1462 &((struct sockaddr_in6 *) 1463 res->ai_addr)->sin6_addr.s6_addr, 1464 sizeof(struct in6_addr)); 1465 n->ifindex = 1466 ((struct sockaddr_in6 *) 1467 res->ai_addr)->sin6_scope_id; 1468 set_ipmask(n, v6mask); 1469 } 1470 n->next = NULL; 1471 n->tail = n; 1472 if (h == NULL) 1473 h = n; 1474 else { 1475 h->tail->next = n; 1476 h->tail = n; 1477 } 1478 } 1479 freeaddrinfo(res0); 1480 free(ps); 1481 1482 return (h); 1483 } 1484 1485 /* 1486 * convert a hostname to a list of addresses and put them in the given buffer. 1487 * test: 1488 * if set to 1, only simple addresses are accepted (no netblock, no "!"). 1489 */ 1490 int 1491 append_addr(struct pfr_buffer *b, char *s, int test) 1492 { 1493 char *r; 1494 struct node_host *h, *n; 1495 int rv, not = 0; 1496 1497 for (r = s; *r == '!'; r++) 1498 not = !not; 1499 if ((n = host(r)) == NULL) { 1500 errno = 0; 1501 return (-1); 1502 } 1503 rv = append_addr_host(b, n, test, not); 1504 do { 1505 h = n; 1506 n = n->next; 1507 free(h); 1508 } while (n != NULL); 1509 return (rv); 1510 } 1511 1512 /* 1513 * same as previous function, but with a pre-parsed input and the ability 1514 * to "negate" the result. Does not free the node_host list. 1515 * not: 1516 * setting it to 1 is equivalent to adding "!" in front of parameter s. 1517 */ 1518 int 1519 append_addr_host(struct pfr_buffer *b, struct node_host *n, int test, int not) 1520 { 1521 int bits; 1522 struct pfr_addr addr; 1523 1524 do { 1525 bzero(&addr, sizeof(addr)); 1526 addr.pfra_not = n->not ^ not; 1527 addr.pfra_af = n->af; 1528 addr.pfra_net = unmask(&n->addr.v.a.mask, n->af); 1529 switch (n->af) { 1530 case AF_INET: 1531 addr.pfra_ip4addr.s_addr = n->addr.v.a.addr.addr32[0]; 1532 bits = 32; 1533 break; 1534 case AF_INET6: 1535 memcpy(&addr.pfra_ip6addr, &n->addr.v.a.addr.v6, 1536 sizeof(struct in6_addr)); 1537 bits = 128; 1538 break; 1539 default: 1540 errno = EINVAL; 1541 return (-1); 1542 } 1543 if ((test && (not || addr.pfra_net != bits)) || 1544 addr.pfra_net > bits) { 1545 errno = EINVAL; 1546 return (-1); 1547 } 1548 if (pfr_buf_add(b, &addr)) 1549 return (-1); 1550 } while ((n = n->next) != NULL); 1551 1552 return (0); 1553 } 1554 1555 int 1556 pfctl_add_trans(struct pfr_buffer *buf, int rs_num, const char *anchor) 1557 { 1558 struct pfioc_trans_e trans; 1559 1560 bzero(&trans, sizeof(trans)); 1561 trans.rs_num = rs_num; 1562 if (strlcpy(trans.anchor, anchor, 1563 sizeof(trans.anchor)) >= sizeof(trans.anchor)) 1564 errx(1, "pfctl_add_trans: strlcpy"); 1565 1566 return pfr_buf_add(buf, &trans); 1567 } 1568 1569 u_int32_t 1570 pfctl_get_ticket(struct pfr_buffer *buf, int rs_num, const char *anchor) 1571 { 1572 struct pfioc_trans_e *p; 1573 1574 PFRB_FOREACH(p, buf) 1575 if (rs_num == p->rs_num && !strcmp(anchor, p->anchor)) 1576 return (p->ticket); 1577 errx(1, "pfctl_get_ticket: assertion failed"); 1578 } 1579 1580 int 1581 pfctl_trans(int dev, struct pfr_buffer *buf, u_long cmd, int from) 1582 { 1583 struct pfioc_trans trans; 1584 1585 bzero(&trans, sizeof(trans)); 1586 trans.size = buf->pfrb_size - from; 1587 trans.esize = sizeof(struct pfioc_trans_e); 1588 trans.array = ((struct pfioc_trans_e *)buf->pfrb_caddr) + from; 1589 return ioctl(dev, cmd, &trans); 1590 } 1591