1 /* $OpenBSD: pfctl_parser.c,v 1.234 2006/10/31 23:46:24 mcbride Exp $ */ 2 3 /* 4 * Copyright (c) 2001 Daniel Hartmeier 5 * Copyright (c) 2002,2003 Henning Brauer 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 12 * - Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * - Redistributions in binary form must reproduce the above 15 * copyright notice, this list of conditions and the following 16 * disclaimer in the documentation and/or other materials provided 17 * with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 20 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 21 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 22 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE 23 * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 24 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 25 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 26 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER 27 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN 29 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 30 * POSSIBILITY OF SUCH DAMAGE. 31 * 32 */ 33 34 #include <sys/user.h> 35 #include <sys/types.h> 36 #include <sys/ioctl.h> 37 #include <sys/socket.h> 38 #include <sys/param.h> 39 #include <net/if.h> 40 #include <netinet/in.h> 41 #include <netinet/in_systm.h> 42 #include <netinet/ip.h> 43 #include <netinet/ip_icmp.h> 44 #include <netinet/icmp6.h> 45 #include <net/pf/pfvar.h> 46 #include <arpa/inet.h> 47 48 #include <stdio.h> 49 #include <stdlib.h> 50 #include <string.h> 51 #include <ctype.h> 52 #include <netdb.h> 53 #include <stdarg.h> 54 #include <errno.h> 55 #include <err.h> 56 #include <ifaddrs.h> 57 #include <unistd.h> 58 59 #include "pfctl_parser.h" 60 #include "pfctl.h" 61 62 void print_op (u_int8_t, const char *, const char *); 63 void print_port (u_int8_t, u_int16_t, u_int16_t, const char *); 64 void print_ugid (u_int8_t, unsigned, unsigned, const char *, unsigned); 65 void print_flags (u_int8_t); 66 void print_fromto(struct pf_rule_addr *, pf_osfp_t, 67 struct pf_rule_addr *, u_int8_t, u_int8_t, int); 68 int ifa_skip_if(const char *filter, struct node_host *p); 69 70 struct node_host *ifa_grouplookup(const char *, int); 71 struct node_host *host_if(const char *, int); 72 static struct node_host *host_v4(const char *); 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 { "althost", ICMP_ALTHOSTADDR }, 85 { "routeradv", ICMP_ROUTERADVERT }, 86 { "routersol", ICMP_ROUTERSOLICIT }, 87 { "timex", ICMP_TIMXCEED }, 88 { "paramprob", ICMP_PARAMPROB }, 89 { "timereq", ICMP_TSTAMP }, 90 { "timerep", ICMP_TSTAMPREPLY }, 91 { "inforeq", ICMP_IREQ }, 92 { "inforep", ICMP_IREQREPLY }, 93 { "maskreq", ICMP_MASKREQ }, 94 { "maskrep", ICMP_MASKREPLY }, 95 { "trace", ICMP_TRACEROUTE }, 96 { "dataconv", ICMP_DATACONVERR }, 97 { "mobredir", ICMP_MOBILE_REDIRECT }, 98 { "ipv6-where", ICMP_IPV6_WHEREAREYOU }, 99 { "ipv6-here", ICMP_IPV6_IAMHERE }, 100 { "mobregreq", ICMP_MOBILE_REGREQUEST }, 101 { "mobregrep", ICMP_MOBILE_REGREPLY }, 102 { "skip", ICMP_SKIP }, 103 { "photuris", ICMP_PHOTURIS } 104 }; 105 106 static const struct icmptypeent icmp6_type[] = { 107 { "unreach", ICMP6_DST_UNREACH }, 108 { "toobig", ICMP6_PACKET_TOO_BIG }, 109 { "timex", ICMP6_TIME_EXCEEDED }, 110 { "paramprob", ICMP6_PARAM_PROB }, 111 { "echoreq", ICMP6_ECHO_REQUEST }, 112 { "echorep", ICMP6_ECHO_REPLY }, 113 { "groupqry", ICMP6_MEMBERSHIP_QUERY }, 114 { "listqry", MLD_LISTENER_QUERY }, 115 { "grouprep", ICMP6_MEMBERSHIP_REPORT }, 116 { "listenrep", MLD_LISTENER_REPORT }, 117 { "groupterm", ICMP6_MEMBERSHIP_REDUCTION }, 118 { "listendone", MLD_LISTENER_DONE }, 119 { "routersol", ND_ROUTER_SOLICIT }, 120 { "routeradv", ND_ROUTER_ADVERT }, 121 { "neighbrsol", ND_NEIGHBOR_SOLICIT }, 122 { "neighbradv", ND_NEIGHBOR_ADVERT }, 123 { "redir", ND_REDIRECT }, 124 { "routrrenum", ICMP6_ROUTER_RENUMBERING }, 125 { "wrureq", ICMP6_WRUREQUEST }, 126 { "wrurep", ICMP6_WRUREPLY }, 127 { "fqdnreq", ICMP6_FQDN_QUERY }, 128 { "fqdnrep", ICMP6_FQDN_REPLY }, 129 { "niqry", ICMP6_NI_QUERY }, 130 { "nirep", ICMP6_NI_REPLY }, 131 { "mtraceresp", MLD_MTRACE_RESP }, 132 { "mtrace", MLD_MTRACE } 133 }; 134 135 static const struct icmpcodeent icmp_code[] = { 136 { "net-unr", ICMP_UNREACH, ICMP_UNREACH_NET }, 137 { "host-unr", ICMP_UNREACH, ICMP_UNREACH_HOST }, 138 { "proto-unr", ICMP_UNREACH, ICMP_UNREACH_PROTOCOL }, 139 { "port-unr", ICMP_UNREACH, ICMP_UNREACH_PORT }, 140 { "needfrag", ICMP_UNREACH, ICMP_UNREACH_NEEDFRAG }, 141 { "srcfail", ICMP_UNREACH, ICMP_UNREACH_SRCFAIL }, 142 { "net-unk", ICMP_UNREACH, ICMP_UNREACH_NET_UNKNOWN }, 143 { "host-unk", ICMP_UNREACH, ICMP_UNREACH_HOST_UNKNOWN }, 144 { "isolate", ICMP_UNREACH, ICMP_UNREACH_ISOLATED }, 145 { "net-prohib", ICMP_UNREACH, ICMP_UNREACH_NET_PROHIB }, 146 { "host-prohib", ICMP_UNREACH, ICMP_UNREACH_HOST_PROHIB }, 147 { "net-tos", ICMP_UNREACH, ICMP_UNREACH_TOSNET }, 148 { "host-tos", ICMP_UNREACH, ICMP_UNREACH_TOSHOST }, 149 { "filter-prohib", ICMP_UNREACH, ICMP_UNREACH_FILTER_PROHIB }, 150 { "host-preced", ICMP_UNREACH, ICMP_UNREACH_HOST_PRECEDENCE }, 151 { "cutoff-preced", ICMP_UNREACH, ICMP_UNREACH_PRECEDENCE_CUTOFF }, 152 { "redir-net", ICMP_REDIRECT, ICMP_REDIRECT_NET }, 153 { "redir-host", ICMP_REDIRECT, ICMP_REDIRECT_HOST }, 154 { "redir-tos-net", ICMP_REDIRECT, ICMP_REDIRECT_TOSNET }, 155 { "redir-tos-host", ICMP_REDIRECT, ICMP_REDIRECT_TOSHOST }, 156 { "normal-adv", ICMP_ROUTERADVERT, ICMP_ROUTERADVERT_NORMAL }, 157 { "common-adv", ICMP_ROUTERADVERT, ICMP_ROUTERADVERT_NOROUTE_COMMON }, 158 { "transit", ICMP_TIMXCEED, ICMP_TIMXCEED_INTRANS }, 159 { "reassemb", ICMP_TIMXCEED, ICMP_TIMXCEED_REASS }, 160 { "badhead", ICMP_PARAMPROB, ICMP_PARAMPROB_ERRATPTR }, 161 { "optmiss", ICMP_PARAMPROB, ICMP_PARAMPROB_OPTABSENT }, 162 { "badlen", ICMP_PARAMPROB, ICMP_PARAMPROB_LENGTH }, 163 { "unknown-ind", ICMP_PHOTURIS, ICMP_PHOTURIS_UNKNOWN_INDEX }, 164 { "auth-fail", ICMP_PHOTURIS, ICMP_PHOTURIS_AUTH_FAILED }, 165 { "decrypt-fail", ICMP_PHOTURIS, ICMP_PHOTURIS_DECRYPT_FAILED } 166 }; 167 168 static const struct icmpcodeent icmp6_code[] = { 169 { "admin-unr", ICMP6_DST_UNREACH, ICMP6_DST_UNREACH_ADMIN }, 170 { "noroute-unr", ICMP6_DST_UNREACH, ICMP6_DST_UNREACH_NOROUTE }, 171 { "notnbr-unr", ICMP6_DST_UNREACH, ICMP6_DST_UNREACH_NOTNEIGHBOR }, 172 { "beyond-unr", ICMP6_DST_UNREACH, ICMP6_DST_UNREACH_BEYONDSCOPE }, 173 { "addr-unr", ICMP6_DST_UNREACH, ICMP6_DST_UNREACH_ADDR }, 174 { "port-unr", ICMP6_DST_UNREACH, ICMP6_DST_UNREACH_NOPORT }, 175 { "transit", ICMP6_TIME_EXCEEDED, ICMP6_TIME_EXCEED_TRANSIT }, 176 { "reassemb", ICMP6_TIME_EXCEEDED, ICMP6_TIME_EXCEED_REASSEMBLY }, 177 { "badhead", ICMP6_PARAM_PROB, ICMP6_PARAMPROB_HEADER }, 178 { "nxthdr", ICMP6_PARAM_PROB, ICMP6_PARAMPROB_NEXTHEADER }, 179 { "redironlink", ND_REDIRECT, ND_REDIRECT_ONLINK }, 180 { "redirrouter", ND_REDIRECT, ND_REDIRECT_ROUTER } 181 }; 182 183 const struct pf_timeout pf_timeouts[] = { 184 { "tcp.first", PFTM_TCP_FIRST_PACKET }, 185 { "tcp.opening", PFTM_TCP_OPENING }, 186 { "tcp.established", PFTM_TCP_ESTABLISHED }, 187 { "tcp.closing", PFTM_TCP_CLOSING }, 188 { "tcp.finwait", PFTM_TCP_FIN_WAIT }, 189 { "tcp.closed", PFTM_TCP_CLOSED }, 190 { "tcp.tsdiff", PFTM_TS_DIFF }, 191 { "udp.first", PFTM_UDP_FIRST_PACKET }, 192 { "udp.single", PFTM_UDP_SINGLE }, 193 { "udp.multiple", PFTM_UDP_MULTIPLE }, 194 { "icmp.first", PFTM_ICMP_FIRST_PACKET }, 195 { "icmp.error", PFTM_ICMP_ERROR_REPLY }, 196 { "other.first", PFTM_OTHER_FIRST_PACKET }, 197 { "other.single", PFTM_OTHER_SINGLE }, 198 { "other.multiple", PFTM_OTHER_MULTIPLE }, 199 { "frag", PFTM_FRAG }, 200 { "interval", PFTM_INTERVAL }, 201 { "adaptive.start", PFTM_ADAPTIVE_START }, 202 { "adaptive.end", PFTM_ADAPTIVE_END }, 203 { "src.track", PFTM_SRC_NODE }, 204 { NULL, 0 } 205 }; 206 207 const struct icmptypeent * 208 geticmptypebynumber(u_int8_t type, sa_family_t af) 209 { 210 unsigned int i; 211 212 if (af != AF_INET6) { 213 for (i=0; i < (sizeof (icmp_type) / sizeof(icmp_type[0])); 214 i++) { 215 if (type == icmp_type[i].type) 216 return (&icmp_type[i]); 217 } 218 } else { 219 for (i=0; i < (sizeof (icmp6_type) / 220 sizeof(icmp6_type[0])); i++) { 221 if (type == icmp6_type[i].type) 222 return (&icmp6_type[i]); 223 } 224 } 225 return (NULL); 226 } 227 228 const struct icmptypeent * 229 geticmptypebyname(char *w, sa_family_t af) 230 { 231 unsigned int i; 232 233 if (af != AF_INET6) { 234 for (i=0; i < (sizeof (icmp_type) / sizeof(icmp_type[0])); 235 i++) { 236 if (!strcmp(w, icmp_type[i].name)) 237 return (&icmp_type[i]); 238 } 239 } else { 240 for (i=0; i < (sizeof (icmp6_type) / 241 sizeof(icmp6_type[0])); i++) { 242 if (!strcmp(w, icmp6_type[i].name)) 243 return (&icmp6_type[i]); 244 } 245 } 246 return (NULL); 247 } 248 249 const struct icmpcodeent * 250 geticmpcodebynumber(u_int8_t type, u_int8_t code, sa_family_t af) 251 { 252 unsigned int i; 253 254 if (af != AF_INET6) { 255 for (i=0; i < (sizeof (icmp_code) / sizeof(icmp_code[0])); 256 i++) { 257 if (type == icmp_code[i].type && 258 code == icmp_code[i].code) 259 return (&icmp_code[i]); 260 } 261 } else { 262 for (i=0; i < (sizeof (icmp6_code) / 263 sizeof(icmp6_code[0])); i++) { 264 if (type == icmp6_code[i].type && 265 code == icmp6_code[i].code) 266 return (&icmp6_code[i]); 267 } 268 } 269 return (NULL); 270 } 271 272 const struct icmpcodeent * 273 geticmpcodebyname(u_long type, char *w, sa_family_t af) 274 { 275 unsigned int i; 276 277 if (af != AF_INET6) { 278 for (i=0; i < (sizeof (icmp_code) / sizeof(icmp_code[0])); 279 i++) { 280 if (type == icmp_code[i].type && 281 !strcmp(w, icmp_code[i].name)) 282 return (&icmp_code[i]); 283 } 284 } else { 285 for (i=0; i < (sizeof (icmp6_code) / 286 sizeof(icmp6_code[0])); i++) { 287 if (type == icmp6_code[i].type && 288 !strcmp(w, icmp6_code[i].name)) 289 return (&icmp6_code[i]); 290 } 291 } 292 return (NULL); 293 } 294 295 void 296 print_op(u_int8_t op, const char *a1, const char *a2) 297 { 298 if (op == PF_OP_IRG) 299 printf(" %s >< %s", a1, a2); 300 else if (op == PF_OP_XRG) 301 printf(" %s <> %s", a1, a2); 302 else if (op == PF_OP_EQ) 303 printf(" = %s", a1); 304 else if (op == PF_OP_NE) 305 printf(" != %s", a1); 306 else if (op == PF_OP_LT) 307 printf(" < %s", a1); 308 else if (op == PF_OP_LE) 309 printf(" <= %s", a1); 310 else if (op == PF_OP_GT) 311 printf(" > %s", a1); 312 else if (op == PF_OP_GE) 313 printf(" >= %s", a1); 314 else if (op == PF_OP_RRG) 315 printf(" %s:%s", a1, a2); 316 } 317 318 void 319 print_port(u_int8_t op, u_int16_t p1, u_int16_t p2, const char *proto) 320 { 321 char a1[6], a2[6]; 322 struct servent *s; 323 324 s = getservbyport(p1, proto); 325 p1 = ntohs(p1); 326 p2 = ntohs(p2); 327 snprintf(a1, sizeof(a1), "%u", p1); 328 snprintf(a2, sizeof(a2), "%u", p2); 329 printf(" port"); 330 if (s != NULL && (op == PF_OP_EQ || op == PF_OP_NE)) 331 print_op(op, s->s_name, a2); 332 else 333 print_op(op, a1, a2); 334 } 335 336 void 337 print_ugid(u_int8_t op, unsigned u1, unsigned u2, const char *t, unsigned umax) 338 { 339 char a1[11], a2[11]; 340 341 snprintf(a1, sizeof(a1), "%u", u1); 342 snprintf(a2, sizeof(a2), "%u", u2); 343 printf(" %s", t); 344 if (u1 == umax && (op == PF_OP_EQ || op == PF_OP_NE)) 345 print_op(op, "unknown", a2); 346 else 347 print_op(op, a1, a2); 348 } 349 350 void 351 print_flags(u_int8_t f) 352 { 353 int i; 354 355 for (i = 0; tcpflags[i]; ++i) 356 if (f & (1 << i)) 357 printf("%c", tcpflags[i]); 358 } 359 360 void 361 print_fromto(struct pf_rule_addr *src, pf_osfp_t osfp, struct pf_rule_addr *dst, 362 sa_family_t af, u_int8_t proto, int verbose) 363 { 364 char buf[PF_OSFP_LEN*3]; 365 if (src->addr.type == PF_ADDR_ADDRMASK && 366 dst->addr.type == PF_ADDR_ADDRMASK && 367 PF_AZERO(&src->addr.v.a.addr, AF_INET6) && 368 PF_AZERO(&src->addr.v.a.mask, AF_INET6) && 369 PF_AZERO(&dst->addr.v.a.addr, AF_INET6) && 370 PF_AZERO(&dst->addr.v.a.mask, AF_INET6) && 371 !src->neg && !dst->neg && 372 !src->port_op && !dst->port_op && 373 osfp == PF_OSFP_ANY) 374 printf(" all"); 375 else { 376 printf(" from "); 377 if (src->neg) 378 printf("! "); 379 print_addr(&src->addr, af, verbose); 380 if (src->port_op) 381 print_port(src->port_op, src->port[0], 382 src->port[1], 383 proto == IPPROTO_TCP ? "tcp" : "udp"); 384 if (osfp != PF_OSFP_ANY) 385 printf(" os \"%s\"", pfctl_lookup_fingerprint(osfp, buf, 386 sizeof(buf))); 387 388 printf(" to "); 389 if (dst->neg) 390 printf("! "); 391 print_addr(&dst->addr, af, verbose); 392 if (dst->port_op) 393 print_port(dst->port_op, dst->port[0], 394 dst->port[1], 395 proto == IPPROTO_TCP ? "tcp" : "udp"); 396 } 397 } 398 399 void 400 print_pool(struct pf_pool *pool, u_int16_t p1, u_int16_t p2, 401 sa_family_t af, int id) 402 { 403 struct pf_pooladdr *pooladdr; 404 405 if ((TAILQ_FIRST(&pool->list) != NULL) && 406 TAILQ_NEXT(TAILQ_FIRST(&pool->list), entries) != NULL) 407 printf("{ "); 408 TAILQ_FOREACH(pooladdr, &pool->list, entries){ 409 switch (id) { 410 case PF_NAT: 411 case PF_RDR: 412 case PF_BINAT: 413 print_addr(&pooladdr->addr, af, 0); 414 break; 415 case PF_PASS: 416 if (PF_AZERO(&pooladdr->addr.v.a.addr, af)) 417 printf("%s", pooladdr->ifname); 418 else { 419 printf("(%s ", pooladdr->ifname); 420 print_addr(&pooladdr->addr, af, 0); 421 printf(")"); 422 } 423 break; 424 default: 425 break; 426 } 427 if (TAILQ_NEXT(pooladdr, entries) != NULL) 428 printf(", "); 429 else if (TAILQ_NEXT(TAILQ_FIRST(&pool->list), entries) != NULL) 430 printf(" }"); 431 } 432 switch (id) { 433 case PF_NAT: 434 if ((p1 != PF_NAT_PROXY_PORT_LOW || 435 p2 != PF_NAT_PROXY_PORT_HIGH) && (p1 != 0 || p2 != 0)) { 436 if (p1 == p2) 437 printf(" port %u", p1); 438 else 439 printf(" port %u:%u", p1, p2); 440 } 441 break; 442 case PF_RDR: 443 if (p1) { 444 printf(" port %u", p1); 445 if (p2 && (p2 != p1)) 446 printf(":%u", p2); 447 } 448 break; 449 default: 450 break; 451 } 452 switch (pool->opts & PF_POOL_TYPEMASK) { 453 case PF_POOL_NONE: 454 break; 455 case PF_POOL_BITMASK: 456 printf(" bitmask"); 457 break; 458 case PF_POOL_RANDOM: 459 printf(" random"); 460 break; 461 case PF_POOL_SRCHASH: 462 printf(" source-hash 0x%08x%08x%08x%08x", 463 pool->key.key32[0], pool->key.key32[1], 464 pool->key.key32[2], pool->key.key32[3]); 465 break; 466 case PF_POOL_ROUNDROBIN: 467 printf(" round-robin"); 468 break; 469 } 470 if (pool->opts & PF_POOL_STICKYADDR) 471 printf(" sticky-address"); 472 if (id == PF_NAT && p1 == 0 && p2 == 0) 473 printf(" static-port"); 474 } 475 476 const char *pf_reasons[PFRES_MAX+1] = PFRES_NAMES; 477 const char *pf_lcounters[LCNT_MAX+1] = LCNT_NAMES; 478 const char *pf_fcounters[FCNT_MAX+1] = FCNT_NAMES; 479 const char *pf_scounters[FCNT_MAX+1] = FCNT_NAMES; 480 481 void 482 print_status(struct pf_status *s, int opts) 483 { 484 char statline[80]; 485 const char *running; 486 time_t runtime; 487 int i; 488 char buf[PF_MD5_DIGEST_LENGTH * 2 + 1]; 489 static const char hex[] = "0123456789abcdef"; 490 491 runtime = time(NULL) - s->since; 492 running = s->running ? "Enabled" : "Disabled"; 493 494 if (s->since) { 495 unsigned sec, min, hrs, day = runtime; 496 497 sec = day % 60; 498 day /= 60; 499 min = day % 60; 500 day /= 60; 501 hrs = day % 24; 502 day /= 24; 503 snprintf(statline, sizeof(statline), 504 "Status: %s for %u days %.2u:%.2u:%.2u", 505 running, day, hrs, min, sec); 506 } else 507 snprintf(statline, sizeof(statline), "Status: %s", running); 508 printf("%-44s", statline); 509 switch (s->debug) { 510 case PF_DEBUG_NONE: 511 printf("%15s\n\n", "Debug: None"); 512 break; 513 case PF_DEBUG_URGENT: 514 printf("%15s\n\n", "Debug: Urgent"); 515 break; 516 case PF_DEBUG_MISC: 517 printf("%15s\n\n", "Debug: Misc"); 518 break; 519 case PF_DEBUG_NOISY: 520 printf("%15s\n\n", "Debug: Loud"); 521 break; 522 } 523 524 if (opts & PF_OPT_VERBOSE) { 525 printf("Hostid: 0x%08x\n", ntohl(s->hostid)); 526 527 for (i = 0; i < PF_MD5_DIGEST_LENGTH; i++) { 528 buf[i + i] = hex[s->pf_chksum[i] >> 4]; 529 buf[i + i + 1] = hex[s->pf_chksum[i] & 0x0f]; 530 } 531 buf[i + i] = '\0'; 532 printf("Checksum: 0x%s\n\n", buf); 533 } 534 535 if (s->ifname[0] != 0) { 536 printf("Interface Stats for %-16s %5s %16s\n", 537 s->ifname, "IPv4", "IPv6"); 538 printf(" %-25s %14llu %16llu\n", "Bytes In", 539 (unsigned long long)s->bcounters[0][0], 540 (unsigned long long)s->bcounters[1][0]); 541 printf(" %-25s %14llu %16llu\n", "Bytes Out", 542 (unsigned long long)s->bcounters[0][1], 543 (unsigned long long)s->bcounters[1][1]); 544 printf(" Packets In\n"); 545 printf(" %-23s %14llu %16llu\n", "Passed", 546 (unsigned long long)s->pcounters[0][0][PF_PASS], 547 (unsigned long long)s->pcounters[1][0][PF_PASS]); 548 printf(" %-23s %14llu %16llu\n", "Blocked", 549 (unsigned long long)s->pcounters[0][0][PF_DROP], 550 (unsigned long long)s->pcounters[1][0][PF_DROP]); 551 printf(" Packets Out\n"); 552 printf(" %-23s %14llu %16llu\n", "Passed", 553 (unsigned long long)s->pcounters[0][1][PF_PASS], 554 (unsigned long long)s->pcounters[1][1][PF_PASS]); 555 printf(" %-23s %14llu %16llu\n\n", "Blocked", 556 (unsigned long long)s->pcounters[0][1][PF_DROP], 557 (unsigned long long)s->pcounters[1][1][PF_DROP]); 558 } 559 printf("%-27s %14s %16s\n", "State Table", "Total", "Rate"); 560 printf(" %-25s %14u %14s\n", "current entries", s->states, ""); 561 for (i = 0; i < FCNT_MAX; i++) { 562 printf(" %-25s %14llu ", pf_fcounters[i], 563 (unsigned long long)s->fcounters[i]); 564 if (runtime > 0) 565 printf("%14.1f/s\n", 566 (double)s->fcounters[i] / (double)runtime); 567 else 568 printf("%14s\n", ""); 569 } 570 if (opts & PF_OPT_VERBOSE) { 571 printf("Source Tracking Table\n"); 572 printf(" %-25s %14u %14s\n", "current entries", 573 s->src_nodes, ""); 574 for (i = 0; i < SCNT_MAX; i++) { 575 printf(" %-25s %14lld ", pf_scounters[i], 576 (unsigned long long)s->scounters[i]); 577 if (runtime > 0) 578 printf("%14.1f/s\n", 579 (double)s->scounters[i] / (double)runtime); 580 else 581 printf("%14s\n", ""); 582 } 583 } 584 printf("Counters\n"); 585 for (i = 0; i < PFRES_MAX; i++) { 586 printf(" %-25s %14llu ", pf_reasons[i], 587 (unsigned long long)s->counters[i]); 588 if (runtime > 0) 589 printf("%14.1f/s\n", 590 (double)s->counters[i] / (double)runtime); 591 else 592 printf("%14s\n", ""); 593 } 594 if (opts & PF_OPT_VERBOSE) { 595 printf("Limit Counters\n"); 596 for (i = 0; i < LCNT_MAX; i++) { 597 printf(" %-25s %14ju ", pf_lcounters[i], 598 (uintmax_t)s->lcounters[i]); 599 if (runtime > 0) 600 printf("%14.1f/s\n", 601 (double)s->lcounters[i] / (double)runtime); 602 else 603 printf("%14s\n", ""); 604 } 605 } 606 } 607 608 void 609 print_src_node(struct pf_src_node *sn, int opts) 610 { 611 struct pf_addr_wrap aw; 612 int min, sec; 613 614 memset(&aw, 0, sizeof(aw)); 615 if (sn->af == AF_INET) 616 aw.v.a.mask.addr32[0] = 0xffffffff; 617 else 618 memset(&aw.v.a.mask, 0xff, sizeof(aw.v.a.mask)); 619 620 aw.v.a.addr = sn->addr; 621 print_addr(&aw, sn->af, opts & PF_OPT_VERBOSE2); 622 printf(" -> "); 623 aw.v.a.addr = sn->raddr; 624 print_addr(&aw, sn->af, opts & PF_OPT_VERBOSE2); 625 printf(" ( states %u, connections %u, rate %u.%u/%us )\n", sn->states, 626 sn->conn, sn->conn_rate.count / 1000, 627 (sn->conn_rate.count % 1000) / 100, sn->conn_rate.seconds); 628 if (opts & PF_OPT_VERBOSE) { 629 sec = sn->creation % 60; 630 sn->creation /= 60; 631 min = sn->creation % 60; 632 sn->creation /= 60; 633 printf(" age %.2u:%.2u:%.2u", sn->creation, min, sec); 634 if (sn->states == 0) { 635 sec = sn->expire % 60; 636 sn->expire /= 60; 637 min = sn->expire % 60; 638 sn->expire /= 60; 639 printf(", expires in %.2u:%.2u:%.2u", 640 sn->expire, min, sec); 641 } 642 printf(", %ju pkts, %ju bytes", 643 (uintmax_t)sn->packets[0] + sn->packets[1], 644 (uintmax_t)sn->bytes[0] + sn->bytes[1]); 645 switch (sn->ruletype) { 646 case PF_NAT: 647 if (sn->rule.nr != (uint32_t)(-1)) 648 printf(", nat rule %u", sn->rule.nr); 649 break; 650 case PF_RDR: 651 if (sn->rule.nr != (uint32_t)(-1)) 652 printf(", rdr rule %u", sn->rule.nr); 653 break; 654 case PF_PASS: 655 if (sn->rule.nr != (uint32_t)(-1)) 656 printf(", filter rule %u", sn->rule.nr); 657 break; 658 } 659 printf("\n"); 660 } 661 } 662 663 void 664 print_rule(struct pf_rule *r, const char *anchor_call, int verbose) 665 { 666 static const char *actiontypes[] = { "pass", "block", "scrub", 667 "no scrub", "nat", "no nat", "binat", "no binat", "rdr", "no rdr" }; 668 static const char *anchortypes[] = { "anchor", "anchor", "anchor", 669 "anchor", "nat-anchor", "nat-anchor", "binat-anchor", 670 "binat-anchor", "rdr-anchor", "rdr-anchor" }; 671 int i, opts; 672 673 if (verbose) 674 printf("@%d ", r->nr); 675 if (r->action > PF_NORDR) 676 printf("action(%d)", r->action); 677 else if (anchor_call[0]) { 678 if (anchor_call[0] == '_') { 679 printf("%s", anchortypes[r->action]); 680 } else 681 printf("%s \"%s\"", anchortypes[r->action], 682 anchor_call); 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) { 739 printf(" log"); 740 if (r->log & ~PF_LOG || r->logif) { 741 int count = 0; 742 743 printf(" ("); 744 if (r->log & PF_LOG_ALL) 745 printf("%sall", count++ ? ", " : ""); 746 if (r->log & PF_LOG_SOCKET_LOOKUP) 747 printf("%suser", count++ ? ", " : ""); 748 if (r->logif) 749 printf("%sto pflog%u", count++ ? ", " : "", 750 r->logif); 751 printf(")"); 752 } 753 } 754 if (r->quick) 755 printf(" quick"); 756 if (r->ifname[0]) { 757 if (r->ifnot) 758 printf(" on ! %s", r->ifname); 759 else 760 printf(" on %s", r->ifname); 761 } 762 if (r->rt) { 763 if (r->rt == PF_ROUTETO) 764 printf(" route-to"); 765 else if (r->rt == PF_REPLYTO) 766 printf(" reply-to"); 767 else if (r->rt == PF_DUPTO) 768 printf(" dup-to"); 769 else if (r->rt == PF_FASTROUTE) 770 printf(" fastroute"); 771 if (r->rt != PF_FASTROUTE) { 772 printf(" "); 773 print_pool(&r->rpool, 0, 0, r->af, PF_PASS); 774 } 775 } 776 if (r->af) { 777 if (r->af == AF_INET) 778 printf(" inet"); 779 else 780 printf(" inet6"); 781 } 782 if (r->proto) { 783 struct protoent *p; 784 785 if ((p = getprotobynumber(r->proto)) != NULL) 786 printf(" proto %s", p->p_name); 787 else 788 printf(" proto %u", r->proto); 789 } 790 print_fromto(&r->src, r->os_fingerprint, &r->dst, r->af, r->proto, 791 verbose); 792 if (r->uid.op) 793 print_ugid(r->uid.op, r->uid.uid[0], r->uid.uid[1], "user", 794 UID_MAX); 795 if (r->gid.op) 796 print_ugid(r->gid.op, r->gid.gid[0], r->gid.gid[1], "group", 797 GID_MAX); 798 if (r->flags || r->flagset) { 799 printf(" flags "); 800 print_flags(r->flags); 801 printf("/"); 802 print_flags(r->flagset); 803 } else if (r->action == PF_PASS && 804 (!r->proto || r->proto == IPPROTO_TCP) && 805 !(r->rule_flag & PFRULE_FRAGMENT) && 806 !anchor_call[0] && r->keep_state) 807 printf(" flags any"); 808 if (r->type) { 809 const struct icmptypeent *it; 810 811 it = geticmptypebynumber(r->type-1, r->af); 812 if (r->af != AF_INET6) 813 printf(" icmp-type"); 814 else 815 printf(" icmp6-type"); 816 if (it != NULL) 817 printf(" %s", it->name); 818 else 819 printf(" %u", r->type-1); 820 if (r->code) { 821 const struct icmpcodeent *ic; 822 823 ic = geticmpcodebynumber(r->type-1, r->code-1, r->af); 824 if (ic != NULL) 825 printf(" code %s", ic->name); 826 else 827 printf(" code %u", r->code-1); 828 } 829 } 830 if (r->tos) 831 printf(" tos 0x%2.2x", r->tos); 832 if (!r->keep_state && r->action == PF_PASS && !anchor_call[0]) 833 printf(" no state"); 834 else if (r->keep_state == PF_STATE_NORMAL) 835 printf(" keep state"); 836 else if (r->keep_state == PF_STATE_MODULATE) 837 printf(" modulate state"); 838 else if (r->keep_state == PF_STATE_SYNPROXY) 839 printf(" synproxy state"); 840 if (r->prob) { 841 char buf[20]; 842 843 snprintf(buf, sizeof(buf), "%f", r->prob*100.0/(UINT_MAX+1.0)); 844 for (i = strlen(buf)-1; i > 0; i--) { 845 if (buf[i] == '0') 846 buf[i] = '\0'; 847 else { 848 if (buf[i] == '.') 849 buf[i] = '\0'; 850 break; 851 } 852 } 853 printf(" probability %s%%", buf); 854 } 855 opts = 0; 856 if (r->max_states || r->max_src_nodes || r->max_src_states) 857 opts = 1; 858 if (r->pickup_mode) 859 opts = 1; 860 if (r->rule_flag & PFRULE_NOSYNC) 861 opts = 1; 862 if (r->rule_flag & PFRULE_SRCTRACK) 863 opts = 1; 864 if (r->rule_flag & PFRULE_IFBOUND) 865 opts = 1; 866 for (i = 0; !opts && i < PFTM_MAX; ++i) 867 if (r->timeout[i]) 868 opts = 1; 869 if (opts) { 870 printf(" ("); 871 switch(r->pickup_mode) { 872 case PF_PICKUPS_UNSPECIFIED: 873 break; 874 case PF_PICKUPS_DISABLED: 875 printf("no-pickups"); 876 opts = 0; 877 break; 878 case PF_PICKUPS_HASHONLY: 879 printf("hash-only"); 880 opts = 0; 881 break; 882 case PF_PICKUPS_ENABLED: 883 printf("pickups"); 884 opts = 0; 885 break; 886 default: 887 printf("unknown-pickups-mode-%d", r->pickup_mode); 888 break; 889 } 890 if (r->max_states) { 891 if (!opts) 892 printf(", "); 893 printf("max %u", r->max_states); 894 opts = 0; 895 } 896 if (r->rule_flag & PFRULE_NOSYNC) { 897 if (!opts) 898 printf(", "); 899 printf("no-sync"); 900 opts = 0; 901 } 902 if (r->rule_flag & PFRULE_SRCTRACK) { 903 if (!opts) 904 printf(", "); 905 printf("source-track"); 906 if (r->rule_flag & PFRULE_RULESRCTRACK) 907 printf(" rule"); 908 else 909 printf(" global"); 910 opts = 0; 911 } 912 if (r->max_src_states) { 913 if (!opts) 914 printf(", "); 915 printf("max-src-states %u", r->max_src_states); 916 opts = 0; 917 } 918 if (r->max_src_conn) { 919 if (!opts) 920 printf(", "); 921 printf("max-src-conn %u", r->max_src_conn); 922 opts = 0; 923 } 924 if (r->max_src_conn_rate.limit) { 925 if (!opts) 926 printf(", "); 927 printf("max-src-conn-rate %u/%u", 928 r->max_src_conn_rate.limit, 929 r->max_src_conn_rate.seconds); 930 opts = 0; 931 } 932 if (r->max_src_nodes) { 933 if (!opts) 934 printf(", "); 935 printf("max-src-nodes %u", r->max_src_nodes); 936 opts = 0; 937 } 938 if (r->overload_tblname[0]) { 939 if (!opts) 940 printf(", "); 941 printf("overload <%s>", r->overload_tblname); 942 if (r->flush) 943 printf(" flush"); 944 if (r->flush & PF_FLUSH_GLOBAL) 945 printf(" global"); 946 } 947 if (r->rule_flag & PFRULE_IFBOUND) { 948 if (!opts) 949 printf(", "); 950 printf("if-bound"); 951 opts = 0; 952 } 953 for (i = 0; i < PFTM_MAX; ++i) 954 if (r->timeout[i]) { 955 int j; 956 957 if (!opts) 958 printf(", "); 959 opts = 0; 960 for (j = 0; pf_timeouts[j].name != NULL; 961 ++j) 962 if (pf_timeouts[j].timeout == i) 963 break; 964 printf("%s %u", pf_timeouts[j].name == NULL ? 965 "inv.timeout" : pf_timeouts[j].name, 966 r->timeout[i]); 967 } 968 printf(")"); 969 } 970 if (r->rule_flag & PFRULE_FRAGMENT) 971 printf(" fragment"); 972 if (r->rule_flag & PFRULE_NODF) 973 printf(" no-df"); 974 if (r->rule_flag & PFRULE_RANDOMID) 975 printf(" random-id"); 976 if (r->min_ttl) 977 printf(" min-ttl %d", r->min_ttl); 978 if (r->max_mss) 979 printf(" max-mss %d", r->max_mss); 980 if (r->allow_opts) 981 printf(" allow-opts"); 982 if (r->action == PF_SCRUB) { 983 if (r->rule_flag & PFRULE_REASSEMBLE_TCP) 984 printf(" reassemble tcp"); 985 986 if (r->rule_flag & PFRULE_FRAGDROP) 987 printf(" fragment drop-ovl"); 988 else if (r->rule_flag & PFRULE_FRAGCROP) 989 printf(" fragment crop"); 990 else 991 printf(" fragment reassemble"); 992 } 993 if (r->label[0]) 994 printf(" label \"%s\"", r->label); 995 if (r->qname[0] && r->pqname[0]) 996 printf(" queue(%s, %s)", r->qname, r->pqname); 997 else if (r->qname[0]) 998 printf(" queue %s", r->qname); 999 if (r->tagname[0]) 1000 printf(" tag %s", r->tagname); 1001 if (r->match_tagname[0]) { 1002 if (r->match_tag_not) 1003 printf(" !"); 1004 printf(" tagged %s", r->match_tagname); 1005 } 1006 if (r->rtableid != -1) 1007 printf(" rtable %u", r->rtableid); 1008 if (!anchor_call[0] && (r->action == PF_NAT || 1009 r->action == PF_BINAT || r->action == PF_RDR)) { 1010 printf(" -> "); 1011 print_pool(&r->rpool, r->rpool.proxy_port[0], 1012 r->rpool.proxy_port[1], r->af, r->action); 1013 } 1014 } 1015 1016 void 1017 print_tabledef(const char *name, int flags, int addrs, 1018 struct node_tinithead *nodes) 1019 { 1020 struct node_tinit *ti, *nti; 1021 struct node_host *h; 1022 1023 printf("table <%s>", name); 1024 if (flags & PFR_TFLAG_CONST) 1025 printf(" const"); 1026 if (flags & PFR_TFLAG_PERSIST) 1027 printf(" persist"); 1028 SIMPLEQ_FOREACH(ti, nodes, entries) { 1029 if (ti->file) { 1030 printf(" file \"%s\"", ti->file); 1031 continue; 1032 } 1033 printf(" {"); 1034 for (;;) { 1035 for (h = ti->host; h != NULL; h = h->next) { 1036 printf(h->not ? " !" : " "); 1037 print_addr(&h->addr, h->af, 0); 1038 } 1039 nti = SIMPLEQ_NEXT(ti, entries); 1040 if (nti != NULL && nti->file == NULL) 1041 ti = nti; /* merge lists */ 1042 else 1043 break; 1044 } 1045 printf(" }"); 1046 } 1047 if (addrs && SIMPLEQ_EMPTY(nodes)) 1048 printf(" { }"); 1049 printf("\n"); 1050 } 1051 1052 int 1053 parse_flags(const char *s) 1054 { 1055 const char *p, *q; 1056 u_int8_t f = 0; 1057 1058 for (p = s; *p; p++) { 1059 if ((q = strchr(tcpflags, *p)) == NULL) 1060 return -1; 1061 else 1062 f |= 1 << (q - tcpflags); 1063 } 1064 return (f ? f : PF_TH_ALL); 1065 } 1066 1067 void 1068 set_ipmask(struct node_host *h, u_int8_t b) 1069 { 1070 struct pf_addr *m, *n; 1071 int i, j = 0; 1072 1073 m = &h->addr.v.a.mask; 1074 memset(m, 0, sizeof(*m)); 1075 1076 while (b >= 32) { 1077 m->addr32[j++] = 0xffffffff; 1078 b -= 32; 1079 } 1080 for (i = 31; i > 31-b; --i) 1081 m->addr32[j] |= (1 << i); 1082 if (b) 1083 m->addr32[j] = htonl(m->addr32[j]); 1084 1085 /* Mask off bits of the address that will never be used. */ 1086 n = &h->addr.v.a.addr; 1087 if (h->addr.type == PF_ADDR_ADDRMASK) 1088 for (i = 0; i < 4; i++) 1089 n->addr32[i] = n->addr32[i] & m->addr32[i]; 1090 } 1091 1092 int 1093 check_netmask(struct node_host *h, sa_family_t af) 1094 { 1095 struct node_host *n = NULL; 1096 struct pf_addr *m; 1097 1098 for (n = h; n != NULL; n = n->next) { 1099 if (h->addr.type == PF_ADDR_TABLE) 1100 continue; 1101 m = &h->addr.v.a.mask; 1102 /* fix up netmask for dynaddr */ 1103 if (af == AF_INET && h->addr.type == PF_ADDR_DYNIFTL && 1104 unmask(m, AF_INET6) > 32) 1105 set_ipmask(n, 32); 1106 /* netmasks > 32 bit are invalid on v4 */ 1107 if (af == AF_INET && 1108 (m->addr32[1] || m->addr32[2] || m->addr32[3])) { 1109 fprintf(stderr, "netmask %u invalid for IPv4 address\n", 1110 unmask(m, AF_INET6)); 1111 return (1); 1112 } 1113 } 1114 return (0); 1115 } 1116 1117 /* interface lookup routines */ 1118 1119 struct node_host *iftab; 1120 1121 void 1122 ifa_load(void) 1123 { 1124 struct ifaddrs *ifap, *ifa; 1125 struct node_host *n = NULL, *h = NULL; 1126 1127 if (getifaddrs(&ifap) < 0) 1128 err(1, "getifaddrs"); 1129 1130 for (ifa = ifap; ifa; ifa = ifa->ifa_next) { 1131 if (!(ifa->ifa_addr->sa_family == AF_INET || 1132 ifa->ifa_addr->sa_family == AF_INET6 || 1133 ifa->ifa_addr->sa_family == AF_LINK)) 1134 continue; 1135 n = calloc(1, sizeof(struct node_host)); 1136 if (n == NULL) 1137 err(1, "address: calloc"); 1138 n->af = ifa->ifa_addr->sa_family; 1139 n->ifa_flags = ifa->ifa_flags; 1140 #ifdef __KAME__ 1141 if (n->af == AF_INET6 && 1142 IN6_IS_ADDR_LINKLOCAL(&((struct sockaddr_in6 *) 1143 ifa->ifa_addr)->sin6_addr) && 1144 ((struct sockaddr_in6 *)ifa->ifa_addr)->sin6_scope_id == 1145 0) { 1146 struct sockaddr_in6 *sin6; 1147 1148 sin6 = (struct sockaddr_in6 *)ifa->ifa_addr; 1149 sin6->sin6_scope_id = sin6->sin6_addr.s6_addr[2] << 8 | 1150 sin6->sin6_addr.s6_addr[3]; 1151 sin6->sin6_addr.s6_addr[2] = 0; 1152 sin6->sin6_addr.s6_addr[3] = 0; 1153 } 1154 #endif 1155 n->ifindex = 0; 1156 if (n->af == AF_INET) { 1157 memcpy(&n->addr.v.a.addr, &((struct sockaddr_in *) 1158 ifa->ifa_addr)->sin_addr.s_addr, 1159 sizeof(struct in_addr)); 1160 memcpy(&n->addr.v.a.mask, &((struct sockaddr_in *) 1161 ifa->ifa_netmask)->sin_addr.s_addr, 1162 sizeof(struct in_addr)); 1163 if (ifa->ifa_broadaddr != NULL) 1164 memcpy(&n->bcast, &((struct sockaddr_in *) 1165 ifa->ifa_broadaddr)->sin_addr.s_addr, 1166 sizeof(struct in_addr)); 1167 if (ifa->ifa_dstaddr != NULL) 1168 memcpy(&n->peer, &((struct sockaddr_in *) 1169 ifa->ifa_dstaddr)->sin_addr.s_addr, 1170 sizeof(struct in_addr)); 1171 } else if (n->af == AF_INET6) { 1172 memcpy(&n->addr.v.a.addr, &((struct sockaddr_in6 *) 1173 ifa->ifa_addr)->sin6_addr.s6_addr, 1174 sizeof(struct in6_addr)); 1175 memcpy(&n->addr.v.a.mask, &((struct sockaddr_in6 *) 1176 ifa->ifa_netmask)->sin6_addr.s6_addr, 1177 sizeof(struct in6_addr)); 1178 if (ifa->ifa_broadaddr != NULL) 1179 memcpy(&n->bcast, &((struct sockaddr_in6 *) 1180 ifa->ifa_broadaddr)->sin6_addr.s6_addr, 1181 sizeof(struct in6_addr)); 1182 if (ifa->ifa_dstaddr != NULL) 1183 memcpy(&n->peer, &((struct sockaddr_in6 *) 1184 ifa->ifa_dstaddr)->sin6_addr.s6_addr, 1185 sizeof(struct in6_addr)); 1186 n->ifindex = ((struct sockaddr_in6 *) 1187 ifa->ifa_addr)->sin6_scope_id; 1188 } 1189 if ((n->ifname = strdup(ifa->ifa_name)) == NULL) 1190 err(1, "ifa_load: strdup"); 1191 n->next = NULL; 1192 n->tail = n; 1193 if (h == NULL) 1194 h = n; 1195 else { 1196 h->tail->next = n; 1197 h->tail = n; 1198 } 1199 } 1200 1201 iftab = h; 1202 freeifaddrs(ifap); 1203 } 1204 1205 struct node_host * 1206 ifa_exists(const char *ifa_name) 1207 { 1208 struct node_host *n; 1209 struct ifgroupreq ifgr; 1210 int s; 1211 1212 if (iftab == NULL) 1213 ifa_load(); 1214 1215 /* check wether this is a group */ 1216 if ((s = socket(AF_INET, SOCK_DGRAM, 0)) == -1) 1217 err(1, "socket"); 1218 bzero(&ifgr, sizeof(ifgr)); 1219 strlcpy(ifgr.ifgr_name, ifa_name, sizeof(ifgr.ifgr_name)); 1220 if (ioctl(s, SIOCGIFGMEMB, (caddr_t)&ifgr) == 0) { 1221 /* fake a node_host */ 1222 if ((n = calloc(1, sizeof(*n))) == NULL) 1223 err(1, "calloc"); 1224 if ((n->ifname = strdup(ifa_name)) == NULL) 1225 err(1, "strdup"); 1226 close(s); 1227 return (n); 1228 } 1229 close(s); 1230 1231 for (n = iftab; n; n = n->next) { 1232 if (n->af == AF_LINK && !strncmp(n->ifname, ifa_name, IFNAMSIZ)) 1233 return (n); 1234 } 1235 1236 return (NULL); 1237 } 1238 1239 struct node_host * 1240 ifa_grouplookup(const char *ifa_name, int flags) 1241 { 1242 struct ifg_req *ifg; 1243 struct ifgroupreq ifgr; 1244 int s; 1245 size_t len; 1246 struct node_host *n, *h = NULL; 1247 1248 if ((s = socket(AF_INET, SOCK_DGRAM, 0)) == -1) 1249 err(1, "socket"); 1250 bzero(&ifgr, sizeof(ifgr)); 1251 strlcpy(ifgr.ifgr_name, ifa_name, sizeof(ifgr.ifgr_name)); 1252 if (ioctl(s, SIOCGIFGMEMB, (caddr_t)&ifgr) == -1) { 1253 close(s); 1254 return (NULL); 1255 } 1256 1257 len = ifgr.ifgr_len; 1258 if ((ifgr.ifgr_groups = calloc(1, len)) == NULL) 1259 err(1, "calloc"); 1260 if (ioctl(s, SIOCGIFGMEMB, (caddr_t)&ifgr) == -1) 1261 err(1, "SIOCGIFGMEMB"); 1262 1263 for (ifg = ifgr.ifgr_groups; ifg && len >= sizeof(struct ifg_req); 1264 ifg++) { 1265 len -= sizeof(struct ifg_req); 1266 if ((n = ifa_lookup(ifg->ifgrq_member, flags)) == NULL) 1267 continue; 1268 if (h == NULL) 1269 h = n; 1270 else { 1271 h->tail->next = n; 1272 h->tail = n->tail; 1273 } 1274 } 1275 free(ifgr.ifgr_groups); 1276 close(s); 1277 1278 return (h); 1279 } 1280 1281 struct node_host * 1282 ifa_lookup(const char *ifa_name, int flags) 1283 { 1284 struct node_host *p = NULL, *h = NULL, *n = NULL; 1285 int got4 = 0, got6 = 0; 1286 const char *last_if = NULL; 1287 1288 if ((h = ifa_grouplookup(ifa_name, flags)) != NULL) 1289 return (h); 1290 1291 if (!strncmp(ifa_name, "self", IFNAMSIZ)) 1292 ifa_name = NULL; 1293 1294 if (iftab == NULL) 1295 ifa_load(); 1296 1297 for (p = iftab; p; p = p->next) { 1298 if (ifa_skip_if(ifa_name, p)) 1299 continue; 1300 if ((flags & PFI_AFLAG_BROADCAST) && p->af != AF_INET) 1301 continue; 1302 if ((flags & PFI_AFLAG_BROADCAST) && 1303 !(p->ifa_flags & IFF_BROADCAST)) 1304 continue; 1305 if ((flags & PFI_AFLAG_PEER) && 1306 !(p->ifa_flags & IFF_POINTOPOINT)) 1307 continue; 1308 if ((flags & PFI_AFLAG_NETWORK) && p->ifindex > 0) 1309 continue; 1310 if (last_if == NULL || strcmp(last_if, p->ifname)) 1311 got4 = got6 = 0; 1312 last_if = p->ifname; 1313 if ((flags & PFI_AFLAG_NOALIAS) && p->af == AF_INET && got4) 1314 continue; 1315 if ((flags & PFI_AFLAG_NOALIAS) && p->af == AF_INET6 && got6) 1316 continue; 1317 if (p->af == AF_INET) 1318 got4 = 1; 1319 else 1320 got6 = 1; 1321 n = calloc(1, sizeof(struct node_host)); 1322 if (n == NULL) 1323 err(1, "address: calloc"); 1324 n->af = p->af; 1325 if (flags & PFI_AFLAG_BROADCAST) 1326 memcpy(&n->addr.v.a.addr, &p->bcast, 1327 sizeof(struct pf_addr)); 1328 else if (flags & PFI_AFLAG_PEER) 1329 memcpy(&n->addr.v.a.addr, &p->peer, 1330 sizeof(struct pf_addr)); 1331 else 1332 memcpy(&n->addr.v.a.addr, &p->addr.v.a.addr, 1333 sizeof(struct pf_addr)); 1334 if (flags & PFI_AFLAG_NETWORK) 1335 set_ipmask(n, unmask(&p->addr.v.a.mask, n->af)); 1336 else { 1337 if (n->af == AF_INET) { 1338 if (p->ifa_flags & IFF_LOOPBACK && 1339 p->ifa_flags & IFF_LINK1) 1340 memcpy(&n->addr.v.a.mask, 1341 &p->addr.v.a.mask, 1342 sizeof(struct pf_addr)); 1343 else 1344 set_ipmask(n, 32); 1345 } else 1346 set_ipmask(n, 128); 1347 } 1348 n->ifindex = p->ifindex; 1349 1350 n->next = NULL; 1351 n->tail = n; 1352 if (h == NULL) 1353 h = n; 1354 else { 1355 h->tail->next = n; 1356 h->tail = n; 1357 } 1358 } 1359 return (h); 1360 } 1361 1362 int 1363 ifa_skip_if(const char *filter, struct node_host *p) 1364 { 1365 int n; 1366 1367 if (p->af != AF_INET && p->af != AF_INET6) 1368 return (1); 1369 if (filter == NULL || !*filter) 1370 return (0); 1371 if (!strcmp(p->ifname, filter)) 1372 return (0); /* exact match */ 1373 n = strlen(filter); 1374 if (n < 1 || n >= IFNAMSIZ) 1375 return (1); /* sanity check */ 1376 if (filter[n-1] >= '0' && filter[n-1] <= '9') 1377 return (1); /* only do exact match in that case */ 1378 if (strncmp(p->ifname, filter, n)) 1379 return (1); /* prefix doesn't match */ 1380 return (p->ifname[n] < '0' || p->ifname[n] > '9'); 1381 } 1382 1383 1384 struct node_host * 1385 host(const char *s) 1386 { 1387 struct node_host *h = NULL; 1388 int mask, v4mask, v6mask, cont = 1; 1389 char *p, *q, *ps; 1390 1391 if ((p = strrchr(s, '/')) != NULL) { 1392 mask = strtol(p+1, &q, 0); 1393 if (!q || *q || mask > 128 || q == (p+1)) { 1394 fprintf(stderr, "invalid netmask '%s'\n", p); 1395 return (NULL); 1396 } 1397 if ((ps = malloc(strlen(s) - strlen(p) + 1)) == NULL) 1398 err(1, "host: malloc"); 1399 strlcpy(ps, s, strlen(s) - strlen(p) + 1); 1400 v4mask = v6mask = mask; 1401 } else { 1402 if ((ps = strdup(s)) == NULL) 1403 err(1, "host: strdup"); 1404 v4mask = 32; 1405 v6mask = 128; 1406 mask = -1; 1407 } 1408 1409 /* interface with this name exists? */ 1410 if (cont && (h = host_if(ps, mask)) != NULL) 1411 cont = 0; 1412 1413 /* IPv4 address? */ 1414 if (cont && (h = host_v4(s)) != NULL) 1415 cont = 0; 1416 1417 /* IPv6 address? */ 1418 if (cont && (h = host_v6(ps, v6mask)) != NULL) 1419 cont = 0; 1420 1421 /* dns lookup */ 1422 if (cont && (h = host_dns(ps, v4mask, v6mask)) != NULL) 1423 cont = 0; 1424 free(ps); 1425 1426 if (h == NULL || cont == 1) { 1427 fprintf(stderr, "no IP address found for %s\n", s); 1428 return (NULL); 1429 } 1430 return (h); 1431 } 1432 1433 struct node_host * 1434 host_if(const char *s, int mask) 1435 { 1436 struct node_host *n, *h = NULL; 1437 char *p, *ps; 1438 int flags = 0; 1439 1440 if ((ps = strdup(s)) == NULL) 1441 err(1, "host_if: strdup"); 1442 while ((p = strrchr(ps, ':')) != NULL) { 1443 if (!strcmp(p+1, "network")) 1444 flags |= PFI_AFLAG_NETWORK; 1445 else if (!strcmp(p+1, "broadcast")) 1446 flags |= PFI_AFLAG_BROADCAST; 1447 else if (!strcmp(p+1, "peer")) 1448 flags |= PFI_AFLAG_PEER; 1449 else if (!strcmp(p+1, "0")) 1450 flags |= PFI_AFLAG_NOALIAS; 1451 else { 1452 free(ps); 1453 return (NULL); 1454 } 1455 *p = '\0'; 1456 } 1457 if (flags & (flags - 1) & PFI_AFLAG_MODEMASK) { /* Yep! */ 1458 fprintf(stderr, "illegal combination of interface modifiers\n"); 1459 free(ps); 1460 return (NULL); 1461 } 1462 if ((flags & (PFI_AFLAG_NETWORK|PFI_AFLAG_BROADCAST)) && mask > -1) { 1463 fprintf(stderr, "network or broadcast lookup, but " 1464 "extra netmask given\n"); 1465 free(ps); 1466 return (NULL); 1467 } 1468 if (ifa_exists(ps) || !strncmp(ps, "self", IFNAMSIZ)) { 1469 /* interface with this name exists */ 1470 h = ifa_lookup(ps, flags); 1471 for (n = h; n != NULL && mask > -1; n = n->next) 1472 set_ipmask(n, mask); 1473 } 1474 1475 free(ps); 1476 return (h); 1477 } 1478 1479 static struct node_host * 1480 host_v4(const char *s) 1481 { 1482 struct node_host *h = NULL; 1483 struct in_addr ina; 1484 int bits = 32; 1485 1486 memset(&ina, 0, sizeof(struct in_addr)); 1487 if (strrchr(s, '/') != NULL) { 1488 if ((bits = inet_net_pton(AF_INET, s, &ina, sizeof(ina))) == -1) 1489 return (NULL); 1490 } else { 1491 if (inet_pton(AF_INET, s, &ina) != 1) 1492 return (NULL); 1493 } 1494 1495 h = calloc(1, sizeof(struct node_host)); 1496 if (h == NULL) 1497 err(1, "address: calloc"); 1498 h->ifname = NULL; 1499 h->af = AF_INET; 1500 h->addr.v.a.addr.addr32[0] = ina.s_addr; 1501 set_ipmask(h, bits); 1502 h->next = NULL; 1503 h->tail = h; 1504 1505 return (h); 1506 } 1507 1508 struct node_host * 1509 host_v6(const char *s, int mask) 1510 { 1511 struct addrinfo hints, *res; 1512 struct node_host *h = NULL; 1513 1514 memset(&hints, 0, sizeof(hints)); 1515 hints.ai_family = AF_INET6; 1516 hints.ai_socktype = SOCK_DGRAM; /*dummy*/ 1517 hints.ai_flags = AI_NUMERICHOST; 1518 if (getaddrinfo(s, "0", &hints, &res) == 0) { 1519 h = calloc(1, sizeof(struct node_host)); 1520 if (h == NULL) 1521 err(1, "address: calloc"); 1522 h->ifname = NULL; 1523 h->af = AF_INET6; 1524 memcpy(&h->addr.v.a.addr, 1525 &((struct sockaddr_in6 *)res->ai_addr)->sin6_addr, 1526 sizeof(h->addr.v.a.addr)); 1527 h->ifindex = 1528 ((struct sockaddr_in6 *)res->ai_addr)->sin6_scope_id; 1529 set_ipmask(h, mask); 1530 freeaddrinfo(res); 1531 h->next = NULL; 1532 h->tail = h; 1533 } 1534 1535 return (h); 1536 } 1537 1538 struct node_host * 1539 host_dns(const char *s, int v4mask, int v6mask) 1540 { 1541 struct addrinfo hints, *res0, *res; 1542 struct node_host *n, *h = NULL; 1543 int error, noalias = 0; 1544 int got4 = 0, got6 = 0; 1545 char *p, *ps; 1546 1547 if ((ps = strdup(s)) == NULL) 1548 err(1, "host_dns: strdup"); 1549 if ((p = strrchr(ps, ':')) != NULL && !strcmp(p, ":0")) { 1550 noalias = 1; 1551 *p = '\0'; 1552 } 1553 memset(&hints, 0, sizeof(hints)); 1554 hints.ai_family = PF_UNSPEC; 1555 hints.ai_socktype = SOCK_STREAM; /* DUMMY */ 1556 error = getaddrinfo(ps, NULL, &hints, &res0); 1557 if (error) { 1558 free(ps); 1559 return (h); 1560 } 1561 1562 for (res = res0; res; res = res->ai_next) { 1563 if (res->ai_family != AF_INET && 1564 res->ai_family != AF_INET6) 1565 continue; 1566 if (noalias) { 1567 if (res->ai_family == AF_INET) { 1568 if (got4) 1569 continue; 1570 got4 = 1; 1571 } else { 1572 if (got6) 1573 continue; 1574 got6 = 1; 1575 } 1576 } 1577 n = calloc(1, sizeof(struct node_host)); 1578 if (n == NULL) 1579 err(1, "host_dns: calloc"); 1580 n->ifname = NULL; 1581 n->af = res->ai_family; 1582 if (res->ai_family == AF_INET) { 1583 memcpy(&n->addr.v.a.addr, 1584 &((struct sockaddr_in *) 1585 res->ai_addr)->sin_addr.s_addr, 1586 sizeof(struct in_addr)); 1587 set_ipmask(n, v4mask); 1588 } else { 1589 memcpy(&n->addr.v.a.addr, 1590 &((struct sockaddr_in6 *) 1591 res->ai_addr)->sin6_addr.s6_addr, 1592 sizeof(struct in6_addr)); 1593 n->ifindex = 1594 ((struct sockaddr_in6 *) 1595 res->ai_addr)->sin6_scope_id; 1596 set_ipmask(n, v6mask); 1597 } 1598 n->next = NULL; 1599 n->tail = n; 1600 if (h == NULL) 1601 h = n; 1602 else { 1603 h->tail->next = n; 1604 h->tail = n; 1605 } 1606 } 1607 freeaddrinfo(res0); 1608 free(ps); 1609 1610 return (h); 1611 } 1612 1613 /* 1614 * convert a hostname to a list of addresses and put them in the given buffer. 1615 * test: 1616 * if set to 1, only simple addresses are accepted (no netblock, no "!"). 1617 */ 1618 int 1619 append_addr(struct pfr_buffer *b, char *s, int test) 1620 { 1621 char *r; 1622 struct node_host *h, *n; 1623 int rv, not = 0; 1624 1625 for (r = s; *r == '!'; r++) 1626 not = !not; 1627 if ((n = host(r)) == NULL) { 1628 errno = 0; 1629 return (-1); 1630 } 1631 rv = append_addr_host(b, n, test, not); 1632 do { 1633 h = n; 1634 n = n->next; 1635 free(h); 1636 } while (n != NULL); 1637 return (rv); 1638 } 1639 1640 /* 1641 * same as previous function, but with a pre-parsed input and the ability 1642 * to "negate" the result. Does not free the node_host list. 1643 * not: 1644 * setting it to 1 is equivalent to adding "!" in front of parameter s. 1645 */ 1646 int 1647 append_addr_host(struct pfr_buffer *b, struct node_host *n, int test, int not) 1648 { 1649 int bits; 1650 struct pfr_addr addr; 1651 1652 do { 1653 bzero(&addr, sizeof(addr)); 1654 addr.pfra_not = n->not ^ not; 1655 addr.pfra_af = n->af; 1656 addr.pfra_net = unmask(&n->addr.v.a.mask, n->af); 1657 switch (n->af) { 1658 case AF_INET: 1659 addr.pfra_ip4addr.s_addr = n->addr.v.a.addr.addr32[0]; 1660 bits = 32; 1661 break; 1662 case AF_INET6: 1663 memcpy(&addr.pfra_ip6addr, &n->addr.v.a.addr.v6, 1664 sizeof(struct in6_addr)); 1665 bits = 128; 1666 break; 1667 default: 1668 errno = EINVAL; 1669 return (-1); 1670 } 1671 if ((test && (not || addr.pfra_net != bits)) || 1672 addr.pfra_net > bits) { 1673 errno = EINVAL; 1674 return (-1); 1675 } 1676 if (pfr_buf_add(b, &addr)) 1677 return (-1); 1678 } while ((n = n->next) != NULL); 1679 1680 return (0); 1681 } 1682 1683 int 1684 pfctl_add_trans(struct pfr_buffer *buf, int rs_num, const char *anchor) 1685 { 1686 struct pfioc_trans_e trans; 1687 1688 bzero(&trans, sizeof(trans)); 1689 trans.rs_num = rs_num; 1690 if (strlcpy(trans.anchor, anchor, 1691 sizeof(trans.anchor)) >= sizeof(trans.anchor)) 1692 errx(1, "pfctl_add_trans: strlcpy"); 1693 1694 return pfr_buf_add(buf, &trans); 1695 } 1696 1697 u_int32_t 1698 pfctl_get_ticket(struct pfr_buffer *buf, int rs_num, const char *anchor) 1699 { 1700 const struct pfioc_trans_e *p; 1701 1702 PFRB_FOREACH(p, buf) 1703 if (rs_num == p->rs_num && !strcmp(anchor, p->anchor)) 1704 return (p->ticket); 1705 errx(1, "pfctl_get_ticket: assertion failed"); 1706 } 1707 1708 int 1709 pfctl_trans(int dev, struct pfr_buffer *buf, u_long cmd, int from) 1710 { 1711 struct pfioc_trans trans; 1712 1713 bzero(&trans, sizeof(trans)); 1714 trans.size = buf->pfrb_size - from; 1715 trans.esize = sizeof(struct pfioc_trans_e); 1716 trans.array = ((struct pfioc_trans_e *)buf->pfrb_caddr) + from; 1717 return ioctl(dev, cmd, &trans); 1718 } 1719