pfctl_parser.c revision 1.3
1 /* $NetBSD: pfctl_parser.c,v 1.3 2004/06/24 11:05:10 hannken Exp $ */ 2 /* $OpenBSD: pfctl_parser.c,v 1.194.2.1 2004/05/05 04:00:50 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 { "udp.first", PFTM_UDP_FIRST_PACKET }, 227 { "udp.single", PFTM_UDP_SINGLE }, 228 { "udp.multiple", PFTM_UDP_MULTIPLE }, 229 { "icmp.first", PFTM_ICMP_FIRST_PACKET }, 230 { "icmp.error", PFTM_ICMP_ERROR_REPLY }, 231 { "other.first", PFTM_OTHER_FIRST_PACKET }, 232 { "other.single", PFTM_OTHER_SINGLE }, 233 { "other.multiple", PFTM_OTHER_MULTIPLE }, 234 { "frag", PFTM_FRAG }, 235 { "interval", PFTM_INTERVAL }, 236 { "adaptive.start", PFTM_ADAPTIVE_START }, 237 { "adaptive.end", PFTM_ADAPTIVE_END }, 238 { "src.track", PFTM_SRC_NODE }, 239 { NULL, 0 } 240 }; 241 242 const struct icmptypeent * 243 geticmptypebynumber(u_int8_t type, sa_family_t af) 244 { 245 unsigned int i; 246 247 if (af != AF_INET6) { 248 for (i=0; i < (sizeof (icmp_type) / sizeof(icmp_type[0])); 249 i++) { 250 if (type == icmp_type[i].type) 251 return (&icmp_type[i]); 252 } 253 } else { 254 for (i=0; i < (sizeof (icmp6_type) / 255 sizeof(icmp6_type[0])); i++) { 256 if (type == icmp6_type[i].type) 257 return (&icmp6_type[i]); 258 } 259 } 260 return (NULL); 261 } 262 263 const struct icmptypeent * 264 geticmptypebyname(char *w, sa_family_t af) 265 { 266 unsigned int i; 267 268 if (af != AF_INET6) { 269 for (i=0; i < (sizeof (icmp_type) / sizeof(icmp_type[0])); 270 i++) { 271 if (!strcmp(w, icmp_type[i].name)) 272 return (&icmp_type[i]); 273 } 274 } else { 275 for (i=0; i < (sizeof (icmp6_type) / 276 sizeof(icmp6_type[0])); i++) { 277 if (!strcmp(w, icmp6_type[i].name)) 278 return (&icmp6_type[i]); 279 } 280 } 281 return (NULL); 282 } 283 284 const struct icmpcodeent * 285 geticmpcodebynumber(u_int8_t type, u_int8_t code, sa_family_t af) 286 { 287 unsigned int i; 288 289 if (af != AF_INET6) { 290 for (i=0; i < (sizeof (icmp_code) / sizeof(icmp_code[0])); 291 i++) { 292 if (type == icmp_code[i].type && 293 code == icmp_code[i].code) 294 return (&icmp_code[i]); 295 } 296 } else { 297 for (i=0; i < (sizeof (icmp6_code) / 298 sizeof(icmp6_code[0])); i++) { 299 if (type == icmp6_code[i].type && 300 code == icmp6_code[i].code) 301 return (&icmp6_code[i]); 302 } 303 } 304 return (NULL); 305 } 306 307 const struct icmpcodeent * 308 geticmpcodebyname(u_long type, char *w, sa_family_t af) 309 { 310 unsigned int i; 311 312 if (af != AF_INET6) { 313 for (i=0; i < (sizeof (icmp_code) / sizeof(icmp_code[0])); 314 i++) { 315 if (type == icmp_code[i].type && 316 !strcmp(w, icmp_code[i].name)) 317 return (&icmp_code[i]); 318 } 319 } else { 320 for (i=0; i < (sizeof (icmp6_code) / 321 sizeof(icmp6_code[0])); i++) { 322 if (type == icmp6_code[i].type && 323 !strcmp(w, icmp6_code[i].name)) 324 return (&icmp6_code[i]); 325 } 326 } 327 return (NULL); 328 } 329 330 void 331 print_op(u_int8_t op, const char *a1, const char *a2) 332 { 333 if (op == PF_OP_IRG) 334 printf(" %s >< %s", a1, a2); 335 else if (op == PF_OP_XRG) 336 printf(" %s <> %s", a1, a2); 337 else if (op == PF_OP_EQ) 338 printf(" = %s", a1); 339 else if (op == PF_OP_NE) 340 printf(" != %s", a1); 341 else if (op == PF_OP_LT) 342 printf(" < %s", a1); 343 else if (op == PF_OP_LE) 344 printf(" <= %s", a1); 345 else if (op == PF_OP_GT) 346 printf(" > %s", a1); 347 else if (op == PF_OP_GE) 348 printf(" >= %s", a1); 349 else if (op == PF_OP_RRG) 350 printf(" %s:%s", a1, a2); 351 } 352 353 void 354 print_port(u_int8_t op, u_int16_t p1, u_int16_t p2, const char *proto) 355 { 356 char a1[6], a2[6]; 357 struct servent *s; 358 359 s = getservbyport(p1, proto); 360 p1 = ntohs(p1); 361 p2 = ntohs(p2); 362 snprintf(a1, sizeof(a1), "%u", p1); 363 snprintf(a2, sizeof(a2), "%u", p2); 364 printf(" port"); 365 if (s != NULL && (op == PF_OP_EQ || op == PF_OP_NE)) 366 print_op(op, s->s_name, a2); 367 else 368 print_op(op, a1, a2); 369 } 370 371 void 372 print_ugid(u_int8_t op, unsigned u1, unsigned u2, const char *t, unsigned umax) 373 { 374 char a1[11], a2[11]; 375 376 snprintf(a1, sizeof(a1), "%u", u1); 377 snprintf(a2, sizeof(a2), "%u", u2); 378 printf(" %s", t); 379 if (u1 == umax && (op == PF_OP_EQ || op == PF_OP_NE)) 380 print_op(op, "unknown", a2); 381 else 382 print_op(op, a1, a2); 383 } 384 385 void 386 print_flags(u_int8_t f) 387 { 388 int i; 389 390 for (i = 0; tcpflags[i]; ++i) 391 if (f & (1 << i)) 392 printf("%c", tcpflags[i]); 393 } 394 395 void 396 print_fromto(struct pf_rule_addr *src, pf_osfp_t osfp, struct pf_rule_addr *dst, 397 sa_family_t af, u_int8_t proto, int verbose) 398 { 399 char buf[PF_OSFP_LEN*3]; 400 if (src->addr.type == PF_ADDR_ADDRMASK && 401 dst->addr.type == PF_ADDR_ADDRMASK && 402 PF_AZERO(&src->addr.v.a.addr, AF_INET6) && 403 PF_AZERO(&src->addr.v.a.mask, AF_INET6) && 404 PF_AZERO(&dst->addr.v.a.addr, AF_INET6) && 405 PF_AZERO(&dst->addr.v.a.mask, AF_INET6) && 406 !src->not && !dst->not && 407 !src->port_op && !dst->port_op && 408 osfp == PF_OSFP_ANY) 409 printf(" all"); 410 else { 411 printf(" from "); 412 if (src->not) 413 printf("! "); 414 print_addr(&src->addr, af, verbose); 415 if (src->port_op) 416 print_port(src->port_op, src->port[0], 417 src->port[1], 418 proto == IPPROTO_TCP ? "tcp" : "udp"); 419 if (osfp != PF_OSFP_ANY) 420 printf(" os \"%s\"", pfctl_lookup_fingerprint(osfp, buf, 421 sizeof(buf))); 422 423 printf(" to "); 424 if (dst->not) 425 printf("! "); 426 print_addr(&dst->addr, af, verbose); 427 if (dst->port_op) 428 print_port(dst->port_op, dst->port[0], 429 dst->port[1], 430 proto == IPPROTO_TCP ? "tcp" : "udp"); 431 } 432 } 433 434 void 435 print_pool(struct pf_pool *pool, u_int16_t p1, u_int16_t p2, 436 sa_family_t af, int id) 437 { 438 struct pf_pooladdr *pooladdr; 439 440 if ((TAILQ_FIRST(&pool->list) != NULL) && 441 TAILQ_NEXT(TAILQ_FIRST(&pool->list), entries) != NULL) 442 printf("{ "); 443 TAILQ_FOREACH(pooladdr, &pool->list, entries){ 444 switch (id) { 445 case PF_NAT: 446 case PF_RDR: 447 case PF_BINAT: 448 print_addr(&pooladdr->addr, af, 0); 449 break; 450 case PF_PASS: 451 if (PF_AZERO(&pooladdr->addr.v.a.addr, af)) 452 printf("%s", pooladdr->ifname); 453 else { 454 printf("(%s ", pooladdr->ifname); 455 print_addr(&pooladdr->addr, af, 0); 456 printf(")"); 457 } 458 break; 459 default: 460 break; 461 } 462 if (TAILQ_NEXT(pooladdr, entries) != NULL) 463 printf(", "); 464 else if (TAILQ_NEXT(TAILQ_FIRST(&pool->list), entries) != NULL) 465 printf(" }"); 466 } 467 switch (id) { 468 case PF_NAT: 469 if ((p1 != PF_NAT_PROXY_PORT_LOW || 470 p2 != PF_NAT_PROXY_PORT_HIGH) && (p1 != 0 || p2 != 0)) { 471 if (p1 == p2) 472 printf(" port %u", p1); 473 else 474 printf(" port %u:%u", p1, p2); 475 } 476 break; 477 case PF_RDR: 478 if (p1) { 479 printf(" port %u", p1); 480 if (p2 && (p2 != p1)) 481 printf(":%u", p2); 482 } 483 break; 484 default: 485 break; 486 } 487 switch (pool->opts & PF_POOL_TYPEMASK) { 488 case PF_POOL_NONE: 489 break; 490 case PF_POOL_BITMASK: 491 printf(" bitmask"); 492 break; 493 case PF_POOL_RANDOM: 494 printf(" random"); 495 break; 496 case PF_POOL_SRCHASH: 497 printf(" source-hash 0x%08x%08x%08x%08x", 498 pool->key.key32[0], pool->key.key32[1], 499 pool->key.key32[2], pool->key.key32[3]); 500 break; 501 case PF_POOL_ROUNDROBIN: 502 printf(" round-robin"); 503 break; 504 } 505 if (pool->opts & PF_POOL_STICKYADDR) 506 printf(" sticky-address"); 507 if (id == PF_NAT && p1 == 0 && p2 == 0) 508 printf(" static-port"); 509 } 510 511 const char *pf_reasons[PFRES_MAX+1] = PFRES_NAMES; 512 const char *pf_fcounters[FCNT_MAX+1] = FCNT_NAMES; 513 const char *pf_scounters[FCNT_MAX+1] = FCNT_NAMES; 514 515 void 516 print_status(struct pf_status *s, int opts) 517 { 518 char statline[80], *running; 519 time_t runtime; 520 int i; 521 522 runtime = time(NULL) - s->since; 523 running = s->running ? "Enabled" : "Disabled"; 524 525 if (s->since) { 526 unsigned sec, min, hrs, day = runtime; 527 528 sec = day % 60; 529 day /= 60; 530 min = day % 60; 531 day /= 60; 532 hrs = day % 24; 533 day /= 24; 534 snprintf(statline, sizeof(statline), 535 "Status: %s for %u days %.2u:%.2u:%.2u", 536 running, day, hrs, min, sec); 537 } else 538 snprintf(statline, sizeof(statline), "Status: %s", running); 539 printf("%-44s", statline); 540 switch (s->debug) { 541 case PF_DEBUG_NONE: 542 printf("%15s\n\n", "Debug: None"); 543 break; 544 case PF_DEBUG_URGENT: 545 printf("%15s\n\n", "Debug: Urgent"); 546 break; 547 case PF_DEBUG_MISC: 548 printf("%15s\n\n", "Debug: Misc"); 549 break; 550 case PF_DEBUG_NOISY: 551 printf("%15s\n\n", "Debug: Loud"); 552 break; 553 } 554 printf("Hostid: 0x%08x\n\n", ntohl(s->hostid)); 555 if (s->ifname[0] != 0) { 556 printf("Interface Stats for %-16s %5s %16s\n", 557 s->ifname, "IPv4", "IPv6"); 558 printf(" %-25s %14llu %16llu\n", "Bytes In", 559 (unsigned long long)s->bcounters[0][0], 560 (unsigned long long)s->bcounters[1][0]); 561 printf(" %-25s %14llu %16llu\n", "Bytes Out", 562 (unsigned long long)s->bcounters[0][1], 563 (unsigned long long)s->bcounters[1][1]); 564 printf(" Packets In\n"); 565 printf(" %-23s %14llu %16llu\n", "Passed", 566 (unsigned long long)s->pcounters[0][0][PF_PASS], 567 (unsigned long long)s->pcounters[1][0][PF_PASS]); 568 printf(" %-23s %14llu %16llu\n", "Blocked", 569 (unsigned long long)s->pcounters[0][0][PF_DROP], 570 (unsigned long long)s->pcounters[1][0][PF_DROP]); 571 printf(" Packets Out\n"); 572 printf(" %-23s %14llu %16llu\n", "Passed", 573 (unsigned long long)s->pcounters[0][1][PF_PASS], 574 (unsigned long long)s->pcounters[1][1][PF_PASS]); 575 printf(" %-23s %14llu %16llu\n\n", "Blocked", 576 (unsigned long long)s->pcounters[0][1][PF_DROP], 577 (unsigned long long)s->pcounters[1][1][PF_DROP]); 578 } 579 printf("%-27s %14s %16s\n", "State Table", "Total", "Rate"); 580 printf(" %-25s %14u %14s\n", "current entries", s->states, ""); 581 for (i = 0; i < FCNT_MAX; i++) { 582 printf(" %-25s %14llu ", pf_fcounters[i], 583 (unsigned long long)s->fcounters[i]); 584 if (runtime > 0) 585 printf("%14.1f/s\n", 586 (double)s->fcounters[i] / (double)runtime); 587 else 588 printf("%14s\n", ""); 589 } 590 if (opts & PF_OPT_VERBOSE) { 591 printf("Source Tracking Table\n"); 592 printf(" %-25s %14u %14s\n", "current entries", 593 s->src_nodes, ""); 594 for (i = 0; i < SCNT_MAX; i++) { 595 printf(" %-25s %14lld ", pf_scounters[i], 596 (unsigned long long)s->scounters[i]); 597 if (runtime > 0) 598 printf("%14.1f/s\n", 599 (double)s->scounters[i] / (double)runtime); 600 else 601 printf("%14s\n", ""); 602 } 603 } 604 printf("Counters\n"); 605 for (i = 0; i < PFRES_MAX; i++) { 606 printf(" %-25s %14llu ", pf_reasons[i], 607 (unsigned long long)s->counters[i]); 608 if (runtime > 0) 609 printf("%14.1f/s\n", 610 (double)s->counters[i] / (double)runtime); 611 else 612 printf("%14s\n", ""); 613 } 614 } 615 616 void 617 print_src_node(struct pf_src_node *sn, int opts) 618 { 619 struct pf_addr_wrap aw; 620 int min, sec; 621 622 memset(&aw, 0, sizeof(aw)); 623 if (sn->af == AF_INET) 624 aw.v.a.mask.addr32[0] = 0xffffffff; 625 else 626 memset(&aw.v.a.mask, 0xff, sizeof(aw.v.a.mask)); 627 628 aw.v.a.addr = sn->addr; 629 print_addr(&aw, sn->af, opts & PF_OPT_VERBOSE2); 630 printf(" -> "); 631 aw.v.a.addr = sn->raddr; 632 print_addr(&aw, sn->af, opts & PF_OPT_VERBOSE2); 633 printf(" (%d states)\n", sn->states); 634 if (opts & PF_OPT_VERBOSE) { 635 sec = sn->creation % 60; 636 sn->creation /= 60; 637 min = sn->creation % 60; 638 sn->creation /= 60; 639 printf(" age %.2u:%.2u:%.2u", sn->creation, min, sec); 640 if (sn->states == 0) { 641 sec = sn->expire % 60; 642 sn->expire /= 60; 643 min = sn->expire % 60; 644 sn->expire /= 60; 645 printf(", expires in %.2u:%.2u:%.2u", 646 sn->expire, min, sec); 647 } 648 printf(", %u pkts, %u bytes", sn->packets, sn->bytes); 649 switch (sn->ruletype) { 650 case PF_NAT: 651 if (sn->rule.nr != -1) 652 printf(", nat rule %u", sn->rule.nr); 653 break; 654 case PF_RDR: 655 if (sn->rule.nr != -1) 656 printf(", rdr rule %u", sn->rule.nr); 657 break; 658 case PF_PASS: 659 if (sn->rule.nr != -1) 660 printf(", filter rule %u", sn->rule.nr); 661 break; 662 } 663 printf("\n"); 664 } 665 } 666 667 void 668 print_rule(struct pf_rule *r, int verbose) 669 { 670 static const char *actiontypes[] = { "pass", "block", "scrub", "nat", 671 "no nat", "binat", "no binat", "rdr", "no rdr" }; 672 static const char *anchortypes[] = { "anchor", "anchor", "anchor", 673 "nat-anchor", "nat-anchor", "binat-anchor", "binat-anchor", 674 "rdr-anchor", "rdr-anchor" }; 675 int i, opts; 676 677 if (verbose) 678 printf("@%d ", r->nr); 679 if (r->action > PF_NORDR) 680 printf("action(%d)", r->action); 681 else if (r->anchorname[0]) 682 printf("%s %s", anchortypes[r->action], r->anchorname); 683 else { 684 printf("%s", actiontypes[r->action]); 685 if (r->natpass) 686 printf(" pass"); 687 } 688 if (r->action == PF_DROP) { 689 if (r->rule_flag & PFRULE_RETURN) 690 printf(" return"); 691 else if (r->rule_flag & PFRULE_RETURNRST) { 692 if (!r->return_ttl) 693 printf(" return-rst"); 694 else 695 printf(" return-rst(ttl %d)", r->return_ttl); 696 } else if (r->rule_flag & PFRULE_RETURNICMP) { 697 const struct icmpcodeent *ic, *ic6; 698 699 ic = geticmpcodebynumber(r->return_icmp >> 8, 700 r->return_icmp & 255, AF_INET); 701 ic6 = geticmpcodebynumber(r->return_icmp6 >> 8, 702 r->return_icmp6 & 255, AF_INET6); 703 704 switch (r->af) { 705 case AF_INET: 706 printf(" return-icmp"); 707 if (ic == NULL) 708 printf("(%u)", r->return_icmp & 255); 709 else 710 printf("(%s)", ic->name); 711 break; 712 case AF_INET6: 713 printf(" return-icmp6"); 714 if (ic6 == NULL) 715 printf("(%u)", r->return_icmp6 & 255); 716 else 717 printf("(%s)", ic6->name); 718 break; 719 default: 720 printf(" return-icmp"); 721 if (ic == NULL) 722 printf("(%u, ", r->return_icmp & 255); 723 else 724 printf("(%s, ", ic->name); 725 if (ic6 == NULL) 726 printf("%u)", r->return_icmp6 & 255); 727 else 728 printf("%s)", ic6->name); 729 break; 730 } 731 } else 732 printf(" drop"); 733 } 734 if (r->direction == PF_IN) 735 printf(" in"); 736 else if (r->direction == PF_OUT) 737 printf(" out"); 738 if (r->log == 1) 739 printf(" log"); 740 else if (r->log == 2) 741 printf(" log-all"); 742 if (r->quick) 743 printf(" quick"); 744 if (r->ifname[0]) { 745 if (r->ifnot) 746 printf(" on ! %s", r->ifname); 747 else 748 printf(" on %s", r->ifname); 749 } 750 if (r->rt) { 751 if (r->rt == PF_ROUTETO) 752 printf(" route-to"); 753 else if (r->rt == PF_REPLYTO) 754 printf(" reply-to"); 755 else if (r->rt == PF_DUPTO) 756 printf(" dup-to"); 757 else if (r->rt == PF_FASTROUTE) 758 printf(" fastroute"); 759 if (r->rt != PF_FASTROUTE) { 760 printf(" "); 761 print_pool(&r->rpool, 0, 0, r->af, PF_PASS); 762 } 763 } 764 if (r->af) { 765 if (r->af == AF_INET) 766 printf(" inet"); 767 else 768 printf(" inet6"); 769 } 770 if (r->proto) { 771 struct protoent *p; 772 773 if ((p = getprotobynumber(r->proto)) != NULL) 774 printf(" proto %s", p->p_name); 775 else 776 printf(" proto %u", r->proto); 777 } 778 print_fromto(&r->src, r->os_fingerprint, &r->dst, r->af, r->proto, 779 verbose); 780 if (r->uid.op) 781 print_ugid(r->uid.op, r->uid.uid[0], r->uid.uid[1], "user", 782 UID_MAX); 783 if (r->gid.op) 784 print_ugid(r->gid.op, r->gid.gid[0], r->gid.gid[1], "group", 785 GID_MAX); 786 if (r->flags || r->flagset) { 787 printf(" flags "); 788 print_flags(r->flags); 789 printf("/"); 790 print_flags(r->flagset); 791 } 792 if (r->type) { 793 const struct icmptypeent *it; 794 795 it = geticmptypebynumber(r->type-1, r->af); 796 if (r->af != AF_INET6) 797 printf(" icmp-type"); 798 else 799 printf(" icmp6-type"); 800 if (it != NULL) 801 printf(" %s", it->name); 802 else 803 printf(" %u", r->type-1); 804 if (r->code) { 805 const struct icmpcodeent *ic; 806 807 ic = geticmpcodebynumber(r->type-1, r->code-1, r->af); 808 if (ic != NULL) 809 printf(" code %s", ic->name); 810 else 811 printf(" code %u", r->code-1); 812 } 813 } 814 if (r->tos) 815 printf(" tos 0x%2.2x", r->tos); 816 if (r->keep_state == PF_STATE_NORMAL) 817 printf(" keep state"); 818 else if (r->keep_state == PF_STATE_MODULATE) 819 printf(" modulate state"); 820 else if (r->keep_state == PF_STATE_SYNPROXY) 821 printf(" synproxy state"); 822 opts = 0; 823 if (r->max_states || r->max_src_nodes || r->max_src_states) 824 opts = 1; 825 if (r->rule_flag & PFRULE_NOSYNC) 826 opts = 1; 827 if (r->rule_flag & PFRULE_SRCTRACK) 828 opts = 1; 829 if (r->rule_flag & (PFRULE_IFBOUND | PFRULE_GRBOUND)) 830 opts = 1; 831 for (i = 0; !opts && i < PFTM_MAX; ++i) 832 if (r->timeout[i]) 833 opts = 1; 834 if (opts) { 835 printf(" ("); 836 if (r->max_states) { 837 printf("max %u", r->max_states); 838 opts = 0; 839 } 840 if (r->rule_flag & PFRULE_NOSYNC) { 841 if (!opts) 842 printf(", "); 843 printf("no-sync"); 844 opts = 0; 845 } 846 if (r->rule_flag & PFRULE_SRCTRACK) { 847 if (!opts) 848 printf(", "); 849 printf("source-track"); 850 if (r->rule_flag & PFRULE_RULESRCTRACK) 851 printf(" rule"); 852 else 853 printf(" global"); 854 opts = 0; 855 } 856 if (r->max_src_states) { 857 if (!opts) 858 printf(", "); 859 printf("max-src-states %u", r->max_src_states); 860 opts = 0; 861 } 862 if (r->max_src_nodes) { 863 if (!opts) 864 printf(", "); 865 printf("max-src-nodes %u", r->max_src_nodes); 866 opts = 0; 867 } 868 if (r->rule_flag & PFRULE_IFBOUND) { 869 if (!opts) 870 printf(", "); 871 printf("if-bound"); 872 opts = 0; 873 } 874 if (r->rule_flag & PFRULE_GRBOUND) { 875 if (!opts) 876 printf(", "); 877 printf("group-bound"); 878 opts = 0; 879 } 880 for (i = 0; i < PFTM_MAX; ++i) 881 if (r->timeout[i]) { 882 if (!opts) 883 printf(", "); 884 opts = 0; 885 printf("%s %u", pf_timeouts[i].name, 886 r->timeout[i]); 887 } 888 printf(")"); 889 } 890 if (r->rule_flag & PFRULE_FRAGMENT) 891 printf(" fragment"); 892 if (r->rule_flag & PFRULE_NODF) 893 printf(" no-df"); 894 if (r->rule_flag & PFRULE_RANDOMID) 895 printf(" random-id"); 896 if (r->min_ttl) 897 printf(" min-ttl %d", r->min_ttl); 898 if (r->max_mss) 899 printf(" max-mss %d", r->max_mss); 900 if (r->allow_opts) 901 printf(" allow-opts"); 902 if (r->action == PF_SCRUB) { 903 if (r->rule_flag & PFRULE_REASSEMBLE_TCP) 904 printf(" reassemble tcp"); 905 906 if (r->rule_flag & PFRULE_FRAGDROP) 907 printf(" fragment drop-ovl"); 908 else if (r->rule_flag & PFRULE_FRAGCROP) 909 printf(" fragment crop"); 910 else 911 printf(" fragment reassemble"); 912 } 913 if (r->label[0]) 914 printf(" label \"%s\"", r->label); 915 if (r->qname[0] && r->pqname[0]) 916 printf(" queue(%s, %s)", r->qname, r->pqname); 917 else if (r->qname[0]) 918 printf(" queue %s", r->qname); 919 if (r->tagname[0]) 920 printf(" tag %s", r->tagname); 921 if (r->match_tagname[0]) { 922 if (r->match_tag_not) 923 printf(" !"); 924 printf(" tagged %s", r->match_tagname); 925 } 926 if (!r->anchorname[0] && (r->action == PF_NAT || 927 r->action == PF_BINAT || r->action == PF_RDR)) { 928 printf(" -> "); 929 print_pool(&r->rpool, r->rpool.proxy_port[0], 930 r->rpool.proxy_port[1], r->af, r->action); 931 } 932 printf("\n"); 933 } 934 935 void 936 print_tabledef(const char *name, int flags, int addrs, 937 struct node_tinithead *nodes) 938 { 939 struct node_tinit *ti, *nti; 940 struct node_host *h; 941 942 printf("table <%s>", name); 943 if (flags & PFR_TFLAG_CONST) 944 printf(" const"); 945 if (flags & PFR_TFLAG_PERSIST) 946 printf(" persist"); 947 SIMPLEQ_FOREACH(ti, nodes, entries) { 948 if (ti->file) { 949 printf(" file \"%s\"", ti->file); 950 continue; 951 } 952 printf(" {"); 953 for (;;) { 954 for (h = ti->host; h != NULL; h = h->next) { 955 printf(h->not ? " !" : " "); 956 print_addr(&h->addr, h->af, 0); 957 } 958 nti = SIMPLEQ_NEXT(ti, entries); 959 if (nti != NULL && nti->file == NULL) 960 ti = nti; /* merge lists */ 961 else 962 break; 963 } 964 printf(" }"); 965 } 966 if (addrs && SIMPLEQ_EMPTY(nodes)) 967 printf(" { }"); 968 printf("\n"); 969 } 970 971 int 972 parse_flags(char *s) 973 { 974 char *p, *q; 975 u_int8_t f = 0; 976 977 for (p = s; *p; p++) { 978 if ((q = strchr(tcpflags, *p)) == NULL) 979 return -1; 980 else 981 f |= 1 << (q - tcpflags); 982 } 983 return (f ? f : PF_TH_ALL); 984 } 985 986 void 987 set_ipmask(struct node_host *h, u_int8_t b) 988 { 989 struct pf_addr *m, *n; 990 int i, j = 0; 991 992 m = &h->addr.v.a.mask; 993 994 for (i = 0; i < 4; i++) 995 m->addr32[i] = 0; 996 997 while (b >= 32) { 998 m->addr32[j++] = 0xffffffff; 999 b -= 32; 1000 } 1001 for (i = 31; i > 31-b; --i) 1002 m->addr32[j] |= (1 << i); 1003 if (b) 1004 m->addr32[j] = htonl(m->addr32[j]); 1005 1006 /* Mask off bits of the address that will never be used. */ 1007 n = &h->addr.v.a.addr; 1008 if (h->addr.type == PF_ADDR_ADDRMASK) 1009 for (i = 0; i < 4; i++) 1010 n->addr32[i] = n->addr32[i] & m->addr32[i]; 1011 } 1012 1013 int 1014 check_netmask(struct node_host *h, sa_family_t af) 1015 { 1016 struct node_host *n = NULL; 1017 struct pf_addr *m; 1018 1019 for (n = h; n != NULL; n = n->next) { 1020 if (h->addr.type == PF_ADDR_TABLE) 1021 continue; 1022 m = &h->addr.v.a.mask; 1023 /* fix up netmask for dynaddr */ 1024 if (af == AF_INET && h->addr.type == PF_ADDR_DYNIFTL && 1025 unmask(m, AF_INET6) > 32) 1026 set_ipmask(n, 32); 1027 /* netmasks > 32 bit are invalid on v4 */ 1028 if (af == AF_INET && 1029 (m->addr32[1] || m->addr32[2] || m->addr32[3])) { 1030 fprintf(stderr, "netmask %u invalid for IPv4 address\n", 1031 unmask(m, AF_INET6)); 1032 return (1); 1033 } 1034 } 1035 return (0); 1036 } 1037 1038 /* interface lookup routines */ 1039 1040 struct node_host *iftab; 1041 1042 void 1043 ifa_load(void) 1044 { 1045 struct ifaddrs *ifap, *ifa; 1046 struct node_host *n = NULL, *h = NULL; 1047 struct pfr_buffer b; 1048 struct pfi_if *p; 1049 1050 if (getifaddrs(&ifap) < 0) 1051 err(1, "getifaddrs"); 1052 1053 for (ifa = ifap; ifa; ifa = ifa->ifa_next) { 1054 if (!(ifa->ifa_addr->sa_family == AF_INET || 1055 ifa->ifa_addr->sa_family == AF_INET6 || 1056 ifa->ifa_addr->sa_family == AF_LINK)) 1057 continue; 1058 n = calloc(1, sizeof(struct node_host)); 1059 if (n == NULL) 1060 err(1, "address: calloc"); 1061 n->af = ifa->ifa_addr->sa_family; 1062 n->ifa_flags = ifa->ifa_flags; 1063 #ifdef __KAME__ 1064 if (n->af == AF_INET6 && 1065 IN6_IS_ADDR_LINKLOCAL(&((struct sockaddr_in6 *) 1066 ifa->ifa_addr)->sin6_addr) && 1067 ((struct sockaddr_in6 *)ifa->ifa_addr)->sin6_scope_id == 1068 0) { 1069 struct sockaddr_in6 *sin6; 1070 1071 sin6 = (struct sockaddr_in6 *)ifa->ifa_addr; 1072 sin6->sin6_scope_id = sin6->sin6_addr.s6_addr[2] << 8 | 1073 sin6->sin6_addr.s6_addr[3]; 1074 sin6->sin6_addr.s6_addr[2] = 0; 1075 sin6->sin6_addr.s6_addr[3] = 0; 1076 } 1077 #endif 1078 n->ifindex = 0; 1079 if (n->af == AF_INET) { 1080 memcpy(&n->addr.v.a.addr, &((struct sockaddr_in *) 1081 ifa->ifa_addr)->sin_addr.s_addr, 1082 sizeof(struct in_addr)); 1083 memcpy(&n->addr.v.a.mask, &((struct sockaddr_in *) 1084 ifa->ifa_netmask)->sin_addr.s_addr, 1085 sizeof(struct in_addr)); 1086 if (ifa->ifa_broadaddr != NULL) 1087 memcpy(&n->bcast, &((struct sockaddr_in *) 1088 ifa->ifa_broadaddr)->sin_addr.s_addr, 1089 sizeof(struct in_addr)); 1090 if (ifa->ifa_dstaddr != NULL) 1091 memcpy(&n->peer, &((struct sockaddr_in *) 1092 ifa->ifa_dstaddr)->sin_addr.s_addr, 1093 sizeof(struct in_addr)); 1094 } else if (n->af == AF_INET6) { 1095 memcpy(&n->addr.v.a.addr, &((struct sockaddr_in6 *) 1096 ifa->ifa_addr)->sin6_addr.s6_addr, 1097 sizeof(struct in6_addr)); 1098 memcpy(&n->addr.v.a.mask, &((struct sockaddr_in6 *) 1099 ifa->ifa_netmask)->sin6_addr.s6_addr, 1100 sizeof(struct in6_addr)); 1101 if (ifa->ifa_broadaddr != NULL) 1102 memcpy(&n->bcast, &((struct sockaddr_in6 *) 1103 ifa->ifa_broadaddr)->sin6_addr.s6_addr, 1104 sizeof(struct in6_addr)); 1105 if (ifa->ifa_dstaddr != NULL) 1106 memcpy(&n->peer, &((struct sockaddr_in6 *) 1107 ifa->ifa_dstaddr)->sin6_addr.s6_addr, 1108 sizeof(struct in6_addr)); 1109 n->ifindex = ((struct sockaddr_in6 *) 1110 ifa->ifa_addr)->sin6_scope_id; 1111 } 1112 if ((n->ifname = strdup(ifa->ifa_name)) == NULL) 1113 err(1, "ifa_load: strdup"); 1114 n->next = NULL; 1115 n->tail = n; 1116 if (h == NULL) 1117 h = n; 1118 else { 1119 h->tail->next = n; 1120 h->tail = n; 1121 } 1122 } 1123 1124 /* add interface groups, including clonable and dynamic stuff */ 1125 bzero(&b, sizeof(b)); 1126 b.pfrb_type = PFRB_IFACES; 1127 for (;;) { 1128 if (pfr_buf_grow(&b, b.pfrb_size)) 1129 err(1, "ifa_load: pfr_buf_grow"); 1130 b.pfrb_size = b.pfrb_msize; 1131 if (pfi_get_ifaces(NULL, b.pfrb_caddr, &b.pfrb_size, 1132 PFI_FLAG_GROUP)) 1133 err(1, "ifa_load: pfi_get_ifaces"); 1134 if (b.pfrb_size <= b.pfrb_msize) 1135 break; 1136 } 1137 PFRB_FOREACH(p, &b) { 1138 n = calloc(1, sizeof(struct node_host)); 1139 if (n == NULL) 1140 err(1, "address: calloc"); 1141 n->af = AF_LINK; 1142 n->ifa_flags = PF_IFA_FLAG_GROUP; 1143 if (p->pfif_flags & PFI_IFLAG_DYNAMIC) 1144 n->ifa_flags |= PF_IFA_FLAG_DYNAMIC; 1145 if (p->pfif_flags & PFI_IFLAG_CLONABLE) 1146 n->ifa_flags |= PF_IFA_FLAG_CLONABLE; 1147 if (!strcmp(p->pfif_name, "lo")) 1148 n->ifa_flags |= IFF_LOOPBACK; 1149 if ((n->ifname = strdup(p->pfif_name)) == NULL) 1150 err(1, "ifa_load: strdup"); 1151 n->next = NULL; 1152 n->tail = n; 1153 if (h == NULL) 1154 h = n; 1155 else { 1156 h->tail->next = n; 1157 h->tail = n; 1158 } 1159 } 1160 1161 iftab = h; 1162 freeifaddrs(ifap); 1163 } 1164 1165 struct node_host * 1166 ifa_exists(const char *ifa_name, int group_ok) 1167 { 1168 struct node_host *n; 1169 char *p, buf[IFNAMSIZ]; 1170 int group; 1171 1172 group = !isdigit(ifa_name[strlen(ifa_name) - 1]); 1173 if (group && !group_ok) 1174 return (NULL); 1175 if (iftab == NULL) 1176 ifa_load(); 1177 1178 for (n = iftab; n; n = n->next) { 1179 if (n->af == AF_LINK && !strncmp(n->ifname, ifa_name, IFNAMSIZ)) 1180 return (n); 1181 } 1182 if (!group) { 1183 /* look for clonable and/or dynamic interface */ 1184 strlcpy(buf, ifa_name, sizeof(buf)); 1185 for (p = buf + strlen(buf) - 1; p > buf && isdigit(*p); p--) 1186 *p = '\0'; 1187 for (n = iftab; n != NULL; n = n->next) 1188 if (n->af == AF_LINK && 1189 !strncmp(n->ifname, buf, IFNAMSIZ)) 1190 break; 1191 if (n != NULL && n->ifa_flags & 1192 (PF_IFA_FLAG_DYNAMIC | PF_IFA_FLAG_CLONABLE)) 1193 return (n); /* XXX */ 1194 } 1195 return (NULL); 1196 } 1197 1198 struct node_host * 1199 ifa_lookup(const char *ifa_name, int flags) 1200 { 1201 struct node_host *p = NULL, *h = NULL, *n = NULL; 1202 int got4 = 0, got6 = 0; 1203 const char *last_if = NULL; 1204 1205 if (!strncmp(ifa_name, "self", IFNAMSIZ)) 1206 ifa_name = NULL; 1207 1208 if (iftab == NULL) 1209 ifa_load(); 1210 1211 for (p = iftab; p; p = p->next) { 1212 if (ifa_skip_if(ifa_name, p)) 1213 continue; 1214 if ((flags & PFI_AFLAG_BROADCAST) && p->af != AF_INET) 1215 continue; 1216 if ((flags & PFI_AFLAG_BROADCAST) && 1217 !(p->ifa_flags & IFF_BROADCAST)) 1218 continue; 1219 if ((flags & PFI_AFLAG_PEER) && 1220 !(p->ifa_flags & IFF_POINTOPOINT)) 1221 continue; 1222 if ((flags & PFI_AFLAG_NETWORK) && p->ifindex > 0) 1223 continue; 1224 if (last_if == NULL || strcmp(last_if, p->ifname)) 1225 got4 = got6 = 0; 1226 last_if = p->ifname; 1227 if ((flags & PFI_AFLAG_NOALIAS) && p->af == AF_INET && got4) 1228 continue; 1229 if ((flags & PFI_AFLAG_NOALIAS) && p->af == AF_INET6 && got6) 1230 continue; 1231 if (p->af == AF_INET) 1232 got4 = 1; 1233 else 1234 got6 = 1; 1235 n = calloc(1, sizeof(struct node_host)); 1236 if (n == NULL) 1237 err(1, "address: calloc"); 1238 n->af = p->af; 1239 if (flags & PFI_AFLAG_BROADCAST) 1240 memcpy(&n->addr.v.a.addr, &p->bcast, 1241 sizeof(struct pf_addr)); 1242 else if (flags & PFI_AFLAG_PEER) 1243 memcpy(&n->addr.v.a.addr, &p->peer, 1244 sizeof(struct pf_addr)); 1245 else 1246 memcpy(&n->addr.v.a.addr, &p->addr.v.a.addr, 1247 sizeof(struct pf_addr)); 1248 if (flags & PFI_AFLAG_NETWORK) 1249 set_ipmask(n, unmask(&p->addr.v.a.mask, n->af)); 1250 else { 1251 if (n->af == AF_INET) { 1252 if (p->ifa_flags & IFF_LOOPBACK && 1253 p->ifa_flags & IFF_LINK1) 1254 memcpy(&n->addr.v.a.mask, 1255 &p->addr.v.a.mask, 1256 sizeof(struct pf_addr)); 1257 else 1258 set_ipmask(n, 32); 1259 } else 1260 set_ipmask(n, 128); 1261 } 1262 n->ifindex = p->ifindex; 1263 1264 n->next = NULL; 1265 n->tail = n; 1266 if (h == NULL) 1267 h = n; 1268 else { 1269 h->tail->next = n; 1270 h->tail = n; 1271 } 1272 } 1273 return (h); 1274 } 1275 1276 int 1277 ifa_skip_if(const char *filter, struct node_host *p) 1278 { 1279 int n; 1280 1281 if (p->af != AF_INET && p->af != AF_INET6) 1282 return (1); 1283 if (filter == NULL || !*filter) 1284 return (0); 1285 if (!strcmp(p->ifname, filter)) 1286 return (0); /* exact match */ 1287 n = strlen(filter); 1288 if (n < 1 || n >= IFNAMSIZ) 1289 return (1); /* sanity check */ 1290 if (filter[n-1] >= '0' && filter[n-1] <= '9') 1291 return (1); /* only do exact match in that case */ 1292 if (strncmp(p->ifname, filter, n)) 1293 return (1); /* prefix doesn't match */ 1294 return (p->ifname[n] < '0' || p->ifname[n] > '9'); 1295 } 1296 1297 1298 struct node_host * 1299 host(const char *s) 1300 { 1301 struct node_host *h = NULL; 1302 int mask, v4mask, v6mask, cont = 1; 1303 char *p, *q, *ps; 1304 1305 if ((p = strrchr(s, '/')) != NULL) { 1306 mask = strtol(p+1, &q, 0); 1307 if (!q || *q || mask > 128 || q == (p+1)) { 1308 fprintf(stderr, "invalid netmask\n"); 1309 return (NULL); 1310 } 1311 if ((ps = malloc(strlen(s) - strlen(p) + 1)) == NULL) 1312 err(1, "host: malloc"); 1313 strlcpy(ps, s, strlen(s) - strlen(p) + 1); 1314 v4mask = v6mask = mask; 1315 } else { 1316 if ((ps = strdup(s)) == NULL) 1317 err(1, "host: strdup"); 1318 v4mask = 32; 1319 v6mask = 128; 1320 mask = -1; 1321 } 1322 1323 /* interface with this name exists? */ 1324 if (cont && (h = host_if(ps, mask)) != NULL) 1325 cont = 0; 1326 1327 /* IPv4 address? */ 1328 if (cont && (h = host_v4(s, mask)) != NULL) 1329 cont = 0; 1330 1331 /* IPv6 address? */ 1332 if (cont && (h = host_v6(ps, v6mask)) != NULL) 1333 cont = 0; 1334 1335 /* dns lookup */ 1336 if (cont && (h = host_dns(ps, v4mask, v6mask)) != NULL) 1337 cont = 0; 1338 free(ps); 1339 1340 if (h == NULL || cont == 1) { 1341 fprintf(stderr, "no IP address found for %s\n", s); 1342 return (NULL); 1343 } 1344 return (h); 1345 } 1346 1347 struct node_host * 1348 host_if(const char *s, int mask) 1349 { 1350 struct node_host *n, *h = NULL; 1351 char *p, *ps; 1352 int flags = 0; 1353 1354 if ((ps = strdup(s)) == NULL) 1355 err(1, "host_if: strdup"); 1356 while ((p = strrchr(ps, ':')) != NULL) { 1357 if (!strcmp(p+1, "network")) 1358 flags |= PFI_AFLAG_NETWORK; 1359 else if (!strcmp(p+1, "broadcast")) 1360 flags |= PFI_AFLAG_BROADCAST; 1361 else if (!strcmp(p+1, "peer")) 1362 flags |= PFI_AFLAG_PEER; 1363 else if (!strcmp(p+1, "0")) 1364 flags |= PFI_AFLAG_NOALIAS; 1365 else { 1366 free(ps); 1367 return (NULL); 1368 } 1369 *p = '\0'; 1370 } 1371 if (flags & (flags - 1) & PFI_AFLAG_MODEMASK) { /* Yep! */ 1372 fprintf(stderr, "illegal combination of interface modifiers\n"); 1373 free(ps); 1374 return (NULL); 1375 } 1376 if ((flags & (PFI_AFLAG_NETWORK|PFI_AFLAG_BROADCAST)) && mask > -1) { 1377 fprintf(stderr, "network or broadcast lookup, but " 1378 "extra netmask given\n"); 1379 free(ps); 1380 return (NULL); 1381 } 1382 if (ifa_exists(ps, 1) || !strncmp(ps, "self", IFNAMSIZ)) { 1383 /* interface with this name exists */ 1384 h = ifa_lookup(ps, flags); 1385 for (n = h; n != NULL && mask > -1; n = n->next) 1386 set_ipmask(n, mask); 1387 } 1388 1389 free(ps); 1390 return (h); 1391 } 1392 1393 struct node_host * 1394 host_v4(const char *s, int mask) 1395 { 1396 struct node_host *h = NULL; 1397 struct in_addr ina; 1398 int bits = 32; 1399 1400 memset(&ina, 0, sizeof(struct in_addr)); 1401 if (strrchr(s, '/') != NULL) { 1402 if ((bits = inet_net_pton(AF_INET, s, &ina, sizeof(ina))) == -1) 1403 return (NULL); 1404 } else { 1405 if (inet_pton(AF_INET, s, &ina) != 1) 1406 return (NULL); 1407 } 1408 1409 h = calloc(1, sizeof(struct node_host)); 1410 if (h == NULL) 1411 err(1, "address: calloc"); 1412 h->ifname = NULL; 1413 h->af = AF_INET; 1414 h->addr.v.a.addr.addr32[0] = ina.s_addr; 1415 set_ipmask(h, bits); 1416 h->next = NULL; 1417 h->tail = h; 1418 1419 return (h); 1420 } 1421 1422 struct node_host * 1423 host_v6(const char *s, int mask) 1424 { 1425 struct addrinfo hints, *res; 1426 struct node_host *h = NULL; 1427 1428 memset(&hints, 0, sizeof(hints)); 1429 hints.ai_family = AF_INET6; 1430 hints.ai_socktype = SOCK_DGRAM; /*dummy*/ 1431 hints.ai_flags = AI_NUMERICHOST; 1432 if (getaddrinfo(s, "0", &hints, &res) == 0) { 1433 h = calloc(1, sizeof(struct node_host)); 1434 if (h == NULL) 1435 err(1, "address: calloc"); 1436 h->ifname = NULL; 1437 h->af = AF_INET6; 1438 memcpy(&h->addr.v.a.addr, 1439 &((struct sockaddr_in6 *)res->ai_addr)->sin6_addr, 1440 sizeof(h->addr.v.a.addr)); 1441 h->ifindex = 1442 ((struct sockaddr_in6 *)res->ai_addr)->sin6_scope_id; 1443 set_ipmask(h, mask); 1444 freeaddrinfo(res); 1445 h->next = NULL; 1446 h->tail = h; 1447 } 1448 1449 return (h); 1450 } 1451 1452 struct node_host * 1453 host_dns(const char *s, int v4mask, int v6mask) 1454 { 1455 struct addrinfo hints, *res0, *res; 1456 struct node_host *n, *h = NULL; 1457 int error, noalias = 0; 1458 int got4 = 0, got6 = 0; 1459 char *p, *ps; 1460 1461 if ((ps = strdup(s)) == NULL) 1462 err(1, "host_if: strdup"); 1463 if ((p = strrchr(ps, ':')) != NULL && !strcmp(p, ":0")) { 1464 noalias = 1; 1465 *p = '\0'; 1466 } 1467 memset(&hints, 0, sizeof(hints)); 1468 hints.ai_family = PF_UNSPEC; 1469 hints.ai_socktype = SOCK_STREAM; /* DUMMY */ 1470 error = getaddrinfo(ps, NULL, &hints, &res0); 1471 if (error) 1472 return (h); 1473 1474 for (res = res0; res; res = res->ai_next) { 1475 if (res->ai_family != AF_INET && 1476 res->ai_family != AF_INET6) 1477 continue; 1478 if (noalias) { 1479 if (res->ai_family == AF_INET) { 1480 if (got4) 1481 continue; 1482 got4 = 1; 1483 } else { 1484 if (got6) 1485 continue; 1486 got6 = 1; 1487 } 1488 } 1489 n = calloc(1, sizeof(struct node_host)); 1490 if (n == NULL) 1491 err(1, "host_dns: calloc"); 1492 n->ifname = NULL; 1493 n->af = res->ai_family; 1494 if (res->ai_family == AF_INET) { 1495 memcpy(&n->addr.v.a.addr, 1496 &((struct sockaddr_in *) 1497 res->ai_addr)->sin_addr.s_addr, 1498 sizeof(struct in_addr)); 1499 set_ipmask(n, v4mask); 1500 } else { 1501 memcpy(&n->addr.v.a.addr, 1502 &((struct sockaddr_in6 *) 1503 res->ai_addr)->sin6_addr.s6_addr, 1504 sizeof(struct in6_addr)); 1505 n->ifindex = 1506 ((struct sockaddr_in6 *) 1507 res->ai_addr)->sin6_scope_id; 1508 set_ipmask(n, v6mask); 1509 } 1510 n->next = NULL; 1511 n->tail = n; 1512 if (h == NULL) 1513 h = n; 1514 else { 1515 h->tail->next = n; 1516 h->tail = n; 1517 } 1518 } 1519 freeaddrinfo(res0); 1520 free(ps); 1521 1522 return (h); 1523 } 1524 1525 /* 1526 * convert a hostname to a list of addresses and put them in the given buffer. 1527 * test: 1528 * if set to 1, only simple addresses are accepted (no netblock, no "!"). 1529 */ 1530 int 1531 append_addr(struct pfr_buffer *b, char *s, int test) 1532 { 1533 char *r; 1534 struct node_host *h, *n; 1535 int rv, not = 0; 1536 1537 for (r = s; *r == '!'; r++) 1538 not = !not; 1539 if ((n = host(r)) == NULL) { 1540 errno = 0; 1541 return (-1); 1542 } 1543 rv = append_addr_host(b, n, test, not); 1544 do { 1545 h = n; 1546 n = n->next; 1547 free(h); 1548 } while (n != NULL); 1549 return (rv); 1550 } 1551 1552 /* 1553 * same as previous function, but with a pre-parsed input and the ability 1554 * to "negate" the result. Does not free the node_host list. 1555 * not: 1556 * setting it to 1 is equivalent to adding "!" in front of parameter s. 1557 */ 1558 int 1559 append_addr_host(struct pfr_buffer *b, struct node_host *n, int test, int not) 1560 { 1561 int bits; 1562 struct pfr_addr addr; 1563 1564 do { 1565 bzero(&addr, sizeof(addr)); 1566 addr.pfra_not = n->not ^ not; 1567 addr.pfra_af = n->af; 1568 addr.pfra_net = unmask(&n->addr.v.a.mask, n->af); 1569 switch (n->af) { 1570 case AF_INET: 1571 addr.pfra_ip4addr.s_addr = n->addr.v.a.addr.addr32[0]; 1572 bits = 32; 1573 break; 1574 case AF_INET6: 1575 memcpy(&addr.pfra_ip6addr, &n->addr.v.a.addr.v6, 1576 sizeof(struct in6_addr)); 1577 bits = 128; 1578 break; 1579 default: 1580 errno = EINVAL; 1581 return (-1); 1582 } 1583 if ((test && (not || addr.pfra_net != bits)) || 1584 addr.pfra_net > bits) { 1585 errno = EINVAL; 1586 return (-1); 1587 } 1588 if (pfr_buf_add(b, &addr)) 1589 return (-1); 1590 } while ((n = n->next) != NULL); 1591 1592 return (0); 1593 } 1594 1595 int 1596 pfctl_add_trans(struct pfr_buffer *buf, int rs_num, const char *anchor, 1597 const char *ruleset) 1598 { 1599 struct pfioc_trans_e trans; 1600 1601 bzero(&trans, sizeof(trans)); 1602 trans.rs_num = rs_num; 1603 if (strlcpy(trans.anchor, anchor, 1604 sizeof(trans.anchor)) >= sizeof(trans.anchor) || 1605 strlcpy(trans.ruleset, ruleset, 1606 sizeof(trans.ruleset)) >= sizeof(trans.ruleset)) 1607 errx(1, "pfctl_add_trans: strlcpy"); 1608 1609 return pfr_buf_add(buf, &trans); 1610 } 1611 1612 u_int32_t 1613 pfctl_get_ticket(struct pfr_buffer *buf, int rs_num, const char *anchor, 1614 const char *ruleset) 1615 { 1616 struct pfioc_trans_e *p; 1617 1618 PFRB_FOREACH(p, buf) 1619 if (rs_num == p->rs_num && !strcmp(anchor, p->anchor) && 1620 !strcmp(ruleset, p->ruleset)) 1621 return (p->ticket); 1622 errx(1, "pfr_get_ticket: assertion failed"); 1623 } 1624 1625 int 1626 pfctl_trans(int dev, struct pfr_buffer *buf, u_long cmd, int from) 1627 { 1628 struct pfioc_trans trans; 1629 1630 bzero(&trans, sizeof(trans)); 1631 trans.size = buf->pfrb_size - from; 1632 trans.esize = sizeof(struct pfioc_trans_e); 1633 trans.array = ((struct pfioc_trans_e *)buf->pfrb_caddr) + from; 1634 return ioctl(dev, cmd, &trans); 1635 } 1636
Indexes created Mon Sep 22 10:09:38 GMT 2025