1 /* $OpenBSD: pfctl_parser.c,v 1.241 2008/09/09 13:56:38 henning 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/types.h> 35 #include <sys/ioctl.h> 36 #include <sys/socket.h> 37 #include <sys/param.h> 38 #include <sys/proc.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/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 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 { "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], *running; 485 time_t runtime; 486 int i; 487 char buf[PF_MD5_DIGEST_LENGTH * 2 + 1]; 488 static const char hex[] = "0123456789abcdef"; 489 490 runtime = time(NULL) - s->since; 491 running = s->running ? "Enabled" : "Disabled"; 492 493 if (s->since) { 494 unsigned int sec, min, hrs, day = runtime; 495 496 sec = day % 60; 497 day /= 60; 498 min = day % 60; 499 day /= 60; 500 hrs = day % 24; 501 day /= 24; 502 snprintf(statline, sizeof(statline), 503 "Status: %s for %u days %.2u:%.2u:%.2u", 504 running, day, hrs, min, sec); 505 } else 506 snprintf(statline, sizeof(statline), "Status: %s", running); 507 printf("%-44s", statline); 508 switch (s->debug) { 509 case PF_DEBUG_NONE: 510 printf("%15s\n\n", "Debug: None"); 511 break; 512 case PF_DEBUG_URGENT: 513 printf("%15s\n\n", "Debug: Urgent"); 514 break; 515 case PF_DEBUG_MISC: 516 printf("%15s\n\n", "Debug: Misc"); 517 break; 518 case PF_DEBUG_NOISY: 519 printf("%15s\n\n", "Debug: Loud"); 520 break; 521 } 522 523 if (opts & PF_OPT_VERBOSE) { 524 printf("Hostid: 0x%08x\n", ntohl(s->hostid)); 525 526 for (i = 0; i < PF_MD5_DIGEST_LENGTH; i++) { 527 buf[i + i] = hex[s->pf_chksum[i] >> 4]; 528 buf[i + i + 1] = hex[s->pf_chksum[i] & 0x0f]; 529 } 530 buf[i + i] = '\0'; 531 printf("Checksum: 0x%s\n\n", buf); 532 } 533 534 if (s->ifname[0] != 0) { 535 printf("Interface Stats for %-16s %5s %16s\n", 536 s->ifname, "IPv4", "IPv6"); 537 printf(" %-25s %14llu %16llu\n", "Bytes In", 538 (unsigned long long)s->bcounters[0][0], 539 (unsigned long long)s->bcounters[1][0]); 540 printf(" %-25s %14llu %16llu\n", "Bytes Out", 541 (unsigned long long)s->bcounters[0][1], 542 (unsigned long long)s->bcounters[1][1]); 543 printf(" Packets In\n"); 544 printf(" %-23s %14llu %16llu\n", "Passed", 545 (unsigned long long)s->pcounters[0][0][PF_PASS], 546 (unsigned long long)s->pcounters[1][0][PF_PASS]); 547 printf(" %-23s %14llu %16llu\n", "Blocked", 548 (unsigned long long)s->pcounters[0][0][PF_DROP], 549 (unsigned long long)s->pcounters[1][0][PF_DROP]); 550 printf(" Packets Out\n"); 551 printf(" %-23s %14llu %16llu\n", "Passed", 552 (unsigned long long)s->pcounters[0][1][PF_PASS], 553 (unsigned long long)s->pcounters[1][1][PF_PASS]); 554 printf(" %-23s %14llu %16llu\n\n", "Blocked", 555 (unsigned long long)s->pcounters[0][1][PF_DROP], 556 (unsigned long long)s->pcounters[1][1][PF_DROP]); 557 } 558 printf("%-27s %14s %16s\n", "State Table", "Total", "Rate"); 559 printf(" %-25s %14u %14s\n", "current entries", s->states, ""); 560 for (i = 0; i < FCNT_MAX; i++) { 561 printf(" %-25s %14llu ", pf_fcounters[i], 562 (unsigned long long)s->fcounters[i]); 563 if (runtime > 0) 564 printf("%14.1f/s\n", 565 (double)s->fcounters[i] / (double)runtime); 566 else 567 printf("%14s\n", ""); 568 } 569 if (opts & PF_OPT_VERBOSE) { 570 printf("Source Tracking Table\n"); 571 printf(" %-25s %14u %14s\n", "current entries", 572 s->src_nodes, ""); 573 for (i = 0; i < SCNT_MAX; i++) { 574 printf(" %-25s %14lld ", pf_scounters[i], 575 s->scounters[i]); 576 if (runtime > 0) 577 printf("%14.1f/s\n", 578 (double)s->scounters[i] / (double)runtime); 579 else 580 printf("%14s\n", ""); 581 } 582 } 583 printf("Counters\n"); 584 for (i = 0; i < PFRES_MAX; i++) { 585 printf(" %-25s %14llu ", pf_reasons[i], 586 (unsigned long long)s->counters[i]); 587 if (runtime > 0) 588 printf("%14.1f/s\n", 589 (double)s->counters[i] / (double)runtime); 590 else 591 printf("%14s\n", ""); 592 } 593 if (opts & PF_OPT_VERBOSE) { 594 printf("Limit Counters\n"); 595 for (i = 0; i < LCNT_MAX; i++) { 596 printf(" %-25s %14lld ", pf_lcounters[i], 597 s->lcounters[i]); 598 if (runtime > 0) 599 printf("%14.1f/s\n", 600 (double)s->lcounters[i] / (double)runtime); 601 else 602 printf("%14s\n", ""); 603 } 604 } 605 } 606 607 void 608 print_src_node(struct pf_src_node *sn, int opts) 609 { 610 struct pf_addr_wrap aw; 611 int min, sec; 612 613 memset(&aw, 0, sizeof(aw)); 614 if (sn->af == AF_INET) 615 aw.v.a.mask.addr32[0] = 0xffffffff; 616 else 617 memset(&aw.v.a.mask, 0xff, sizeof(aw.v.a.mask)); 618 619 aw.v.a.addr = sn->addr; 620 print_addr(&aw, sn->af, opts & PF_OPT_VERBOSE2); 621 printf(" -> "); 622 aw.v.a.addr = sn->raddr; 623 print_addr(&aw, sn->af, opts & PF_OPT_VERBOSE2); 624 printf(" ( states %u, connections %u, rate %u.%u/%us )\n", sn->states, 625 sn->conn, sn->conn_rate.count / 1000, 626 (sn->conn_rate.count % 1000) / 100, sn->conn_rate.seconds); 627 if (opts & PF_OPT_VERBOSE) { 628 sec = sn->creation % 60; 629 sn->creation /= 60; 630 min = sn->creation % 60; 631 sn->creation /= 60; 632 printf(" age %.2u:%.2u:%.2u", sn->creation, min, sec); 633 if (sn->states == 0) { 634 sec = sn->expire % 60; 635 sn->expire /= 60; 636 min = sn->expire % 60; 637 sn->expire /= 60; 638 printf(", expires in %.2u:%.2u:%.2u", 639 sn->expire, min, sec); 640 } 641 printf(", %llu pkts, %llu bytes", 642 sn->packets[0] + sn->packets[1], 643 sn->bytes[0] + sn->bytes[1]); 644 switch (sn->ruletype) { 645 case PF_NAT: 646 if (sn->rule.nr != -1) 647 printf(", nat rule %u", sn->rule.nr); 648 break; 649 case PF_RDR: 650 if (sn->rule.nr != -1) 651 printf(", rdr rule %u", sn->rule.nr); 652 break; 653 case PF_PASS: 654 if (sn->rule.nr != -1) 655 printf(", filter rule %u", sn->rule.nr); 656 break; 657 } 658 printf("\n"); 659 } 660 } 661 662 void 663 print_rule(struct pf_rule *r, const char *anchor_call, int verbose) 664 { 665 static const char *actiontypes[] = { "pass", "block", "scrub", 666 "no scrub", "nat", "no nat", "binat", "no binat", "rdr", "no rdr" }; 667 static const char *anchortypes[] = { "anchor", "anchor", "anchor", 668 "anchor", "nat-anchor", "nat-anchor", "binat-anchor", 669 "binat-anchor", "rdr-anchor", "rdr-anchor" }; 670 int i, opts; 671 672 if (verbose) 673 printf("@%d ", r->nr); 674 if (r->action > PF_NORDR) 675 printf("action(%d)", r->action); 676 else if (anchor_call[0]) { 677 if (anchor_call[0] == '_') { 678 printf("%s", anchortypes[r->action]); 679 } else 680 printf("%s \"%s\"", anchortypes[r->action], 681 anchor_call); 682 } else { 683 printf("%s", actiontypes[r->action]); 684 if (r->natpass) 685 printf(" pass"); 686 } 687 if (r->action == PF_DROP) { 688 if (r->rule_flag & PFRULE_RETURN) 689 printf(" return"); 690 else if (r->rule_flag & PFRULE_RETURNRST) { 691 if (!r->return_ttl) 692 printf(" return-rst"); 693 else 694 printf(" return-rst(ttl %d)", r->return_ttl); 695 } else if (r->rule_flag & PFRULE_RETURNICMP) { 696 const struct icmpcodeent *ic, *ic6; 697 698 ic = geticmpcodebynumber(r->return_icmp >> 8, 699 r->return_icmp & 255, AF_INET); 700 ic6 = geticmpcodebynumber(r->return_icmp6 >> 8, 701 r->return_icmp6 & 255, AF_INET6); 702 703 switch (r->af) { 704 case AF_INET: 705 printf(" return-icmp"); 706 if (ic == NULL) 707 printf("(%u)", r->return_icmp & 255); 708 else 709 printf("(%s)", ic->name); 710 break; 711 case AF_INET6: 712 printf(" return-icmp6"); 713 if (ic6 == NULL) 714 printf("(%u)", r->return_icmp6 & 255); 715 else 716 printf("(%s)", ic6->name); 717 break; 718 default: 719 printf(" return-icmp"); 720 if (ic == NULL) 721 printf("(%u, ", r->return_icmp & 255); 722 else 723 printf("(%s, ", ic->name); 724 if (ic6 == NULL) 725 printf("%u)", r->return_icmp6 & 255); 726 else 727 printf("%s)", ic6->name); 728 break; 729 } 730 } else 731 printf(" drop"); 732 } 733 if (r->direction == PF_IN) 734 printf(" in"); 735 else if (r->direction == PF_OUT) 736 printf(" out"); 737 if (r->log) { 738 printf(" log"); 739 if (r->log & ~PF_LOG || r->logif) { 740 int count = 0; 741 742 printf(" ("); 743 if (r->log & PF_LOG_ALL) 744 printf("%sall", count++ ? ", " : ""); 745 if (r->log & PF_LOG_SOCKET_LOOKUP) 746 printf("%suser", count++ ? ", " : ""); 747 if (r->logif) 748 printf("%sto pflog%u", count++ ? ", " : "", 749 r->logif); 750 printf(")"); 751 } 752 } 753 if (r->quick) 754 printf(" quick"); 755 if (r->ifname[0]) { 756 if (r->ifnot) 757 printf(" on ! %s", r->ifname); 758 else 759 printf(" on %s", r->ifname); 760 } 761 if (r->rt) { 762 if (r->rt == PF_ROUTETO) 763 printf(" route-to"); 764 else if (r->rt == PF_REPLYTO) 765 printf(" reply-to"); 766 else if (r->rt == PF_DUPTO) 767 printf(" dup-to"); 768 else if (r->rt == PF_FASTROUTE) 769 printf(" fastroute"); 770 if (r->rt != PF_FASTROUTE) { 771 printf(" "); 772 print_pool(&r->rpool, 0, 0, r->af, PF_PASS); 773 } 774 } 775 if (r->af) { 776 if (r->af == AF_INET) 777 printf(" inet"); 778 else 779 printf(" inet6"); 780 } 781 if (r->proto) { 782 struct protoent *p; 783 784 if ((p = getprotobynumber(r->proto)) != NULL) 785 printf(" proto %s", p->p_name); 786 else 787 printf(" proto %u", r->proto); 788 } 789 print_fromto(&r->src, r->os_fingerprint, &r->dst, r->af, r->proto, 790 verbose); 791 if (r->uid.op) 792 print_ugid(r->uid.op, r->uid.uid[0], r->uid.uid[1], "user", 793 UID_MAX); 794 if (r->gid.op) 795 print_ugid(r->gid.op, r->gid.gid[0], r->gid.gid[1], "group", 796 GID_MAX); 797 if (r->flags || r->flagset) { 798 printf(" flags "); 799 print_flags(r->flags); 800 printf("/"); 801 print_flags(r->flagset); 802 } else if (r->action == PF_PASS && 803 (!r->proto || r->proto == IPPROTO_TCP) && 804 !(r->rule_flag & PFRULE_FRAGMENT) && 805 !anchor_call[0] && r->keep_state) 806 printf(" flags any"); 807 if (r->type) { 808 const struct icmptypeent *it; 809 810 it = geticmptypebynumber(r->type-1, r->af); 811 if (r->af != AF_INET6) 812 printf(" icmp-type"); 813 else 814 printf(" icmp6-type"); 815 if (it != NULL) 816 printf(" %s", it->name); 817 else 818 printf(" %u", r->type-1); 819 if (r->code) { 820 const struct icmpcodeent *ic; 821 822 ic = geticmpcodebynumber(r->type-1, r->code-1, r->af); 823 if (ic != NULL) 824 printf(" code %s", ic->name); 825 else 826 printf(" code %u", r->code-1); 827 } 828 } 829 if (r->tos) 830 printf(" tos 0x%2.2x", r->tos); 831 if (!r->keep_state && r->action == PF_PASS && !anchor_call[0]) 832 printf(" no state"); 833 else if (r->keep_state == PF_STATE_NORMAL) 834 printf(" keep state"); 835 else if (r->keep_state == PF_STATE_MODULATE) 836 printf(" modulate state"); 837 else if (r->keep_state == PF_STATE_SYNPROXY) 838 printf(" synproxy state"); 839 if (r->prob) { 840 char buf[20]; 841 842 snprintf(buf, sizeof(buf), "%f", r->prob*100.0/(UINT_MAX+1.0)); 843 for (i = strlen(buf)-1; i > 0; i--) { 844 if (buf[i] == '0') 845 buf[i] = '\0'; 846 else { 847 if (buf[i] == '.') 848 buf[i] = '\0'; 849 break; 850 } 851 } 852 printf(" probability %s%%", buf); 853 } 854 opts = 0; 855 if (r->max_states || r->max_src_nodes || r->max_src_states) 856 opts = 1; 857 if (r->rule_flag & PFRULE_NOSYNC) 858 opts = 1; 859 if (r->rule_flag & PFRULE_SRCTRACK) 860 opts = 1; 861 if (r->rule_flag & PFRULE_IFBOUND) 862 opts = 1; 863 if (r->rule_flag & PFRULE_STATESLOPPY) 864 opts = 1; 865 for (i = 0; !opts && i < PFTM_MAX; ++i) 866 if (r->timeout[i]) 867 opts = 1; 868 if (opts) { 869 printf(" ("); 870 if (r->max_states) { 871 printf("max %u", r->max_states); 872 opts = 0; 873 } 874 if (r->rule_flag & PFRULE_NOSYNC) { 875 if (!opts) 876 printf(", "); 877 printf("no-sync"); 878 opts = 0; 879 } 880 if (r->rule_flag & PFRULE_SRCTRACK) { 881 if (!opts) 882 printf(", "); 883 printf("source-track"); 884 if (r->rule_flag & PFRULE_RULESRCTRACK) 885 printf(" rule"); 886 else 887 printf(" global"); 888 opts = 0; 889 } 890 if (r->max_src_states) { 891 if (!opts) 892 printf(", "); 893 printf("max-src-states %u", r->max_src_states); 894 opts = 0; 895 } 896 if (r->max_src_conn) { 897 if (!opts) 898 printf(", "); 899 printf("max-src-conn %u", r->max_src_conn); 900 opts = 0; 901 } 902 if (r->max_src_conn_rate.limit) { 903 if (!opts) 904 printf(", "); 905 printf("max-src-conn-rate %u/%u", 906 r->max_src_conn_rate.limit, 907 r->max_src_conn_rate.seconds); 908 opts = 0; 909 } 910 if (r->max_src_nodes) { 911 if (!opts) 912 printf(", "); 913 printf("max-src-nodes %u", r->max_src_nodes); 914 opts = 0; 915 } 916 if (r->overload_tblname[0]) { 917 if (!opts) 918 printf(", "); 919 printf("overload <%s>", r->overload_tblname); 920 if (r->flush) 921 printf(" flush"); 922 if (r->flush & PF_FLUSH_GLOBAL) 923 printf(" global"); 924 } 925 if (r->rule_flag & PFRULE_IFBOUND) { 926 if (!opts) 927 printf(", "); 928 printf("if-bound"); 929 opts = 0; 930 } 931 if (r->rule_flag & PFRULE_STATESLOPPY) { 932 if (!opts) 933 printf(", "); 934 printf("sloppy"); 935 opts = 0; 936 } 937 if (r->rule_flag & PFRULE_PFLOW) { 938 if (!opts) 939 printf(", "); 940 printf("pflow"); 941 opts = 0; 942 } 943 for (i = 0; i < PFTM_MAX; ++i) 944 if (r->timeout[i]) { 945 int j; 946 947 if (!opts) 948 printf(", "); 949 opts = 0; 950 for (j = 0; pf_timeouts[j].name != NULL; 951 ++j) 952 if (pf_timeouts[j].timeout == i) 953 break; 954 printf("%s %u", pf_timeouts[j].name == NULL ? 955 "inv.timeout" : pf_timeouts[j].name, 956 r->timeout[i]); 957 } 958 printf(")"); 959 } 960 if (r->rule_flag & PFRULE_FRAGMENT) 961 printf(" fragment"); 962 if (r->rule_flag & PFRULE_NODF) 963 printf(" no-df"); 964 if (r->rule_flag & PFRULE_RANDOMID) 965 printf(" random-id"); 966 if (r->min_ttl) 967 printf(" min-ttl %d", r->min_ttl); 968 if (r->max_mss) 969 printf(" max-mss %d", r->max_mss); 970 if (r->rule_flag & PFRULE_SET_TOS) 971 printf(" set-tos 0x%2.2x", r->set_tos); 972 if (r->allow_opts) 973 printf(" allow-opts"); 974 if (r->action == PF_SCRUB) { 975 if (r->rule_flag & PFRULE_REASSEMBLE_TCP) 976 printf(" reassemble tcp"); 977 978 if (r->rule_flag & PFRULE_FRAGDROP) 979 printf(" fragment drop-ovl"); 980 else if (r->rule_flag & PFRULE_FRAGCROP) 981 printf(" fragment crop"); 982 else 983 printf(" fragment reassemble"); 984 } 985 if (r->label[0]) 986 printf(" label \"%s\"", r->label); 987 if (r->qname[0] && r->pqname[0]) 988 printf(" queue(%s, %s)", r->qname, r->pqname); 989 else if (r->qname[0]) 990 printf(" queue %s", r->qname); 991 if (r->tagname[0]) 992 printf(" tag %s", r->tagname); 993 if (r->match_tagname[0]) { 994 if (r->match_tag_not) 995 printf(" !"); 996 printf(" tagged %s", r->match_tagname); 997 } 998 if (r->rtableid != -1) 999 printf(" rtable %u", r->rtableid); 1000 if (r->divert.port) { 1001 if (PF_AZERO(&r->divert.addr, r->af)) { 1002 printf(" divert-reply"); 1003 } else { 1004 /* XXX cut&paste from print_addr */ 1005 char buf[48]; 1006 1007 printf(" divert-to "); 1008 if (inet_ntop(r->af, &r->divert.addr, buf, 1009 sizeof(buf)) == NULL) 1010 printf("?"); 1011 else 1012 printf("%s", buf); 1013 printf(" port %u", ntohs(r->divert.port)); 1014 } 1015 } 1016 if (!anchor_call[0] && (r->action == PF_NAT || 1017 r->action == PF_BINAT || r->action == PF_RDR)) { 1018 printf(" -> "); 1019 print_pool(&r->rpool, r->rpool.proxy_port[0], 1020 r->rpool.proxy_port[1], r->af, r->action); 1021 } 1022 } 1023 1024 void 1025 print_tabledef(const char *name, int flags, int addrs, 1026 struct node_tinithead *nodes) 1027 { 1028 struct node_tinit *ti, *nti; 1029 struct node_host *h; 1030 1031 printf("table <%s>", name); 1032 if (flags & PFR_TFLAG_CONST) 1033 printf(" const"); 1034 if (flags & PFR_TFLAG_PERSIST) 1035 printf(" persist"); 1036 if (flags & PFR_TFLAG_COUNTERS) 1037 printf(" counters"); 1038 SIMPLEQ_FOREACH(ti, nodes, entries) { 1039 if (ti->file) { 1040 printf(" file \"%s\"", ti->file); 1041 continue; 1042 } 1043 printf(" {"); 1044 for (;;) { 1045 for (h = ti->host; h != NULL; h = h->next) { 1046 printf(h->not ? " !" : " "); 1047 print_addr(&h->addr, h->af, 0); 1048 } 1049 nti = SIMPLEQ_NEXT(ti, entries); 1050 if (nti != NULL && nti->file == NULL) 1051 ti = nti; /* merge lists */ 1052 else 1053 break; 1054 } 1055 printf(" }"); 1056 } 1057 if (addrs && SIMPLEQ_EMPTY(nodes)) 1058 printf(" { }"); 1059 printf("\n"); 1060 } 1061 1062 int 1063 parse_flags(char *s) 1064 { 1065 char *p, *q; 1066 u_int8_t f = 0; 1067 1068 for (p = s; *p; p++) { 1069 if ((q = strchr(tcpflags, *p)) == NULL) 1070 return -1; 1071 else 1072 f |= 1 << (q - tcpflags); 1073 } 1074 return (f ? f : PF_TH_ALL); 1075 } 1076 1077 void 1078 set_ipmask(struct node_host *h, u_int8_t b) 1079 { 1080 struct pf_addr *m, *n; 1081 int i, j = 0; 1082 1083 m = &h->addr.v.a.mask; 1084 memset(m, 0, sizeof(*m)); 1085 1086 while (b >= 32) { 1087 m->addr32[j++] = 0xffffffff; 1088 b -= 32; 1089 } 1090 for (i = 31; i > 31-b; --i) 1091 m->addr32[j] |= (1 << i); 1092 if (b) 1093 m->addr32[j] = htonl(m->addr32[j]); 1094 1095 /* Mask off bits of the address that will never be used. */ 1096 n = &h->addr.v.a.addr; 1097 if (h->addr.type == PF_ADDR_ADDRMASK) 1098 for (i = 0; i < 4; i++) 1099 n->addr32[i] = n->addr32[i] & m->addr32[i]; 1100 } 1101 1102 int 1103 check_netmask(struct node_host *h, sa_family_t af) 1104 { 1105 struct node_host *n = NULL; 1106 struct pf_addr *m; 1107 1108 for (n = h; n != NULL; n = n->next) { 1109 if (h->addr.type == PF_ADDR_TABLE) 1110 continue; 1111 m = &h->addr.v.a.mask; 1112 /* fix up netmask for dynaddr */ 1113 if (af == AF_INET && h->addr.type == PF_ADDR_DYNIFTL && 1114 unmask(m, AF_INET6) > 32) 1115 set_ipmask(n, 32); 1116 /* netmasks > 32 bit are invalid on v4 */ 1117 if (af == AF_INET && 1118 (m->addr32[1] || m->addr32[2] || m->addr32[3])) { 1119 fprintf(stderr, "netmask %u invalid for IPv4 address\n", 1120 unmask(m, AF_INET6)); 1121 return (1); 1122 } 1123 } 1124 return (0); 1125 } 1126 1127 /* interface lookup routines */ 1128 1129 struct node_host *iftab; 1130 1131 void 1132 ifa_load(void) 1133 { 1134 struct ifaddrs *ifap, *ifa; 1135 struct node_host *n = NULL, *h = NULL; 1136 1137 if (getifaddrs(&ifap) < 0) 1138 err(1, "getifaddrs"); 1139 1140 for (ifa = ifap; ifa; ifa = ifa->ifa_next) { 1141 if (!(ifa->ifa_addr->sa_family == AF_INET || 1142 ifa->ifa_addr->sa_family == AF_INET6 || 1143 ifa->ifa_addr->sa_family == AF_LINK)) 1144 continue; 1145 n = calloc(1, sizeof(struct node_host)); 1146 if (n == NULL) 1147 err(1, "address: calloc"); 1148 n->af = ifa->ifa_addr->sa_family; 1149 n->ifa_flags = ifa->ifa_flags; 1150 #ifdef __KAME__ 1151 if (n->af == AF_INET6 && 1152 IN6_IS_ADDR_LINKLOCAL(&((struct sockaddr_in6 *) 1153 ifa->ifa_addr)->sin6_addr) && 1154 ((struct sockaddr_in6 *)ifa->ifa_addr)->sin6_scope_id == 1155 0) { 1156 struct sockaddr_in6 *sin6; 1157 1158 sin6 = (struct sockaddr_in6 *)ifa->ifa_addr; 1159 sin6->sin6_scope_id = sin6->sin6_addr.s6_addr[2] << 8 | 1160 sin6->sin6_addr.s6_addr[3]; 1161 sin6->sin6_addr.s6_addr[2] = 0; 1162 sin6->sin6_addr.s6_addr[3] = 0; 1163 } 1164 #endif 1165 n->ifindex = 0; 1166 if (n->af == AF_INET) { 1167 memcpy(&n->addr.v.a.addr, &((struct sockaddr_in *) 1168 ifa->ifa_addr)->sin_addr.s_addr, 1169 sizeof(struct in_addr)); 1170 memcpy(&n->addr.v.a.mask, &((struct sockaddr_in *) 1171 ifa->ifa_netmask)->sin_addr.s_addr, 1172 sizeof(struct in_addr)); 1173 if (ifa->ifa_broadaddr != NULL) 1174 memcpy(&n->bcast, &((struct sockaddr_in *) 1175 ifa->ifa_broadaddr)->sin_addr.s_addr, 1176 sizeof(struct in_addr)); 1177 if (ifa->ifa_dstaddr != NULL) 1178 memcpy(&n->peer, &((struct sockaddr_in *) 1179 ifa->ifa_dstaddr)->sin_addr.s_addr, 1180 sizeof(struct in_addr)); 1181 } else if (n->af == AF_INET6) { 1182 memcpy(&n->addr.v.a.addr, &((struct sockaddr_in6 *) 1183 ifa->ifa_addr)->sin6_addr.s6_addr, 1184 sizeof(struct in6_addr)); 1185 memcpy(&n->addr.v.a.mask, &((struct sockaddr_in6 *) 1186 ifa->ifa_netmask)->sin6_addr.s6_addr, 1187 sizeof(struct in6_addr)); 1188 if (ifa->ifa_broadaddr != NULL) 1189 memcpy(&n->bcast, &((struct sockaddr_in6 *) 1190 ifa->ifa_broadaddr)->sin6_addr.s6_addr, 1191 sizeof(struct in6_addr)); 1192 if (ifa->ifa_dstaddr != NULL) 1193 memcpy(&n->peer, &((struct sockaddr_in6 *) 1194 ifa->ifa_dstaddr)->sin6_addr.s6_addr, 1195 sizeof(struct in6_addr)); 1196 n->ifindex = ((struct sockaddr_in6 *) 1197 ifa->ifa_addr)->sin6_scope_id; 1198 } 1199 if ((n->ifname = strdup(ifa->ifa_name)) == NULL) 1200 err(1, "ifa_load: strdup"); 1201 n->next = NULL; 1202 n->tail = n; 1203 if (h == NULL) 1204 h = n; 1205 else { 1206 h->tail->next = n; 1207 h->tail = n; 1208 } 1209 } 1210 1211 iftab = h; 1212 freeifaddrs(ifap); 1213 } 1214 1215 struct node_host * 1216 ifa_exists(const char *ifa_name) 1217 { 1218 struct node_host *n; 1219 struct ifgroupreq ifgr; 1220 int s; 1221 1222 if (iftab == NULL) 1223 ifa_load(); 1224 1225 /* check wether this is a group */ 1226 if ((s = socket(AF_INET, SOCK_DGRAM, 0)) == -1) 1227 err(1, "socket"); 1228 bzero(&ifgr, sizeof(ifgr)); 1229 strlcpy(ifgr.ifgr_name, ifa_name, sizeof(ifgr.ifgr_name)); 1230 if (ioctl(s, SIOCGIFGMEMB, (caddr_t)&ifgr) == 0) { 1231 /* fake a node_host */ 1232 if ((n = calloc(1, sizeof(*n))) == NULL) 1233 err(1, "calloc"); 1234 if ((n->ifname = strdup(ifa_name)) == NULL) 1235 err(1, "strdup"); 1236 close(s); 1237 return (n); 1238 } 1239 close(s); 1240 1241 for (n = iftab; n; n = n->next) { 1242 if (n->af == AF_LINK && !strncmp(n->ifname, ifa_name, IFNAMSIZ)) 1243 return (n); 1244 } 1245 1246 return (NULL); 1247 } 1248 1249 struct node_host * 1250 ifa_grouplookup(const char *ifa_name, int flags) 1251 { 1252 struct ifg_req *ifg; 1253 struct ifgroupreq ifgr; 1254 int s, len; 1255 struct node_host *n, *h = NULL; 1256 1257 if ((s = socket(AF_INET, SOCK_DGRAM, 0)) == -1) 1258 err(1, "socket"); 1259 bzero(&ifgr, sizeof(ifgr)); 1260 strlcpy(ifgr.ifgr_name, ifa_name, sizeof(ifgr.ifgr_name)); 1261 if (ioctl(s, SIOCGIFGMEMB, (caddr_t)&ifgr) == -1) { 1262 close(s); 1263 return (NULL); 1264 } 1265 1266 len = ifgr.ifgr_len; 1267 if ((ifgr.ifgr_groups = calloc(1, len)) == NULL) 1268 err(1, "calloc"); 1269 if (ioctl(s, SIOCGIFGMEMB, (caddr_t)&ifgr) == -1) 1270 err(1, "SIOCGIFGMEMB"); 1271 1272 for (ifg = ifgr.ifgr_groups; ifg && len >= sizeof(struct ifg_req); 1273 ifg++) { 1274 len -= sizeof(struct ifg_req); 1275 if ((n = ifa_lookup(ifg->ifgrq_member, flags)) == NULL) 1276 continue; 1277 if (h == NULL) 1278 h = n; 1279 else { 1280 h->tail->next = n; 1281 h->tail = n->tail; 1282 } 1283 } 1284 free(ifgr.ifgr_groups); 1285 close(s); 1286 1287 return (h); 1288 } 1289 1290 struct node_host * 1291 ifa_lookup(const char *ifa_name, int flags) 1292 { 1293 struct node_host *p = NULL, *h = NULL, *n = NULL; 1294 int got4 = 0, got6 = 0; 1295 const char *last_if = NULL; 1296 1297 if ((h = ifa_grouplookup(ifa_name, flags)) != NULL) 1298 return (h); 1299 1300 if (!strncmp(ifa_name, "self", IFNAMSIZ)) 1301 ifa_name = NULL; 1302 1303 if (iftab == NULL) 1304 ifa_load(); 1305 1306 for (p = iftab; p; p = p->next) { 1307 if (ifa_skip_if(ifa_name, p)) 1308 continue; 1309 if ((flags & PFI_AFLAG_BROADCAST) && p->af != AF_INET) 1310 continue; 1311 if ((flags & PFI_AFLAG_BROADCAST) && 1312 !(p->ifa_flags & IFF_BROADCAST)) 1313 continue; 1314 if ((flags & PFI_AFLAG_PEER) && 1315 !(p->ifa_flags & IFF_POINTOPOINT)) 1316 continue; 1317 if ((flags & PFI_AFLAG_NETWORK) && p->ifindex > 0) 1318 continue; 1319 if (last_if == NULL || strcmp(last_if, p->ifname)) 1320 got4 = got6 = 0; 1321 last_if = p->ifname; 1322 if ((flags & PFI_AFLAG_NOALIAS) && p->af == AF_INET && got4) 1323 continue; 1324 if ((flags & PFI_AFLAG_NOALIAS) && p->af == AF_INET6 && got6) 1325 continue; 1326 if (p->af == AF_INET) 1327 got4 = 1; 1328 else 1329 got6 = 1; 1330 n = calloc(1, sizeof(struct node_host)); 1331 if (n == NULL) 1332 err(1, "address: calloc"); 1333 n->af = p->af; 1334 if (flags & PFI_AFLAG_BROADCAST) 1335 memcpy(&n->addr.v.a.addr, &p->bcast, 1336 sizeof(struct pf_addr)); 1337 else if (flags & PFI_AFLAG_PEER) 1338 memcpy(&n->addr.v.a.addr, &p->peer, 1339 sizeof(struct pf_addr)); 1340 else 1341 memcpy(&n->addr.v.a.addr, &p->addr.v.a.addr, 1342 sizeof(struct pf_addr)); 1343 if (flags & PFI_AFLAG_NETWORK) 1344 set_ipmask(n, unmask(&p->addr.v.a.mask, n->af)); 1345 else { 1346 if (n->af == AF_INET) { 1347 if (p->ifa_flags & IFF_LOOPBACK && 1348 p->ifa_flags & IFF_LINK1) 1349 memcpy(&n->addr.v.a.mask, 1350 &p->addr.v.a.mask, 1351 sizeof(struct pf_addr)); 1352 else 1353 set_ipmask(n, 32); 1354 } else 1355 set_ipmask(n, 128); 1356 } 1357 n->ifindex = p->ifindex; 1358 1359 n->next = NULL; 1360 n->tail = n; 1361 if (h == NULL) 1362 h = n; 1363 else { 1364 h->tail->next = n; 1365 h->tail = n; 1366 } 1367 } 1368 return (h); 1369 } 1370 1371 int 1372 ifa_skip_if(const char *filter, struct node_host *p) 1373 { 1374 int n; 1375 1376 if (p->af != AF_INET && p->af != AF_INET6) 1377 return (1); 1378 if (filter == NULL || !*filter) 1379 return (0); 1380 if (!strcmp(p->ifname, filter)) 1381 return (0); /* exact match */ 1382 n = strlen(filter); 1383 if (n < 1 || n >= IFNAMSIZ) 1384 return (1); /* sanity check */ 1385 if (filter[n-1] >= '0' && filter[n-1] <= '9') 1386 return (1); /* only do exact match in that case */ 1387 if (strncmp(p->ifname, filter, n)) 1388 return (1); /* prefix doesn't match */ 1389 return (p->ifname[n] < '0' || p->ifname[n] > '9'); 1390 } 1391 1392 1393 struct node_host * 1394 host(const char *s) 1395 { 1396 struct node_host *h = NULL; 1397 int mask, v4mask, v6mask, cont = 1; 1398 char *p, *q, *ps; 1399 1400 if ((p = strrchr(s, '/')) != NULL) { 1401 mask = strtol(p+1, &q, 0); 1402 if (!q || *q || mask > 128 || q == (p+1)) { 1403 fprintf(stderr, "invalid netmask '%s'\n", p); 1404 return (NULL); 1405 } 1406 if ((ps = malloc(strlen(s) - strlen(p) + 1)) == NULL) 1407 err(1, "host: malloc"); 1408 strlcpy(ps, s, strlen(s) - strlen(p) + 1); 1409 v4mask = v6mask = mask; 1410 } else { 1411 if ((ps = strdup(s)) == NULL) 1412 err(1, "host: strdup"); 1413 v4mask = 32; 1414 v6mask = 128; 1415 mask = -1; 1416 } 1417 1418 /* interface with this name exists? */ 1419 if (cont && (h = host_if(ps, mask)) != NULL) 1420 cont = 0; 1421 1422 /* IPv4 address? */ 1423 if (cont && (h = host_v4(s, mask)) != NULL) 1424 cont = 0; 1425 1426 /* IPv6 address? */ 1427 if (cont && (h = host_v6(ps, v6mask)) != NULL) 1428 cont = 0; 1429 1430 /* dns lookup */ 1431 if (cont && (h = host_dns(ps, v4mask, v6mask)) != NULL) 1432 cont = 0; 1433 free(ps); 1434 1435 if (h == NULL || cont == 1) { 1436 fprintf(stderr, "no IP address found for %s\n", s); 1437 return (NULL); 1438 } 1439 return (h); 1440 } 1441 1442 struct node_host * 1443 host_if(const char *s, int mask) 1444 { 1445 struct node_host *n, *h = NULL; 1446 char *p, *ps; 1447 int flags = 0; 1448 1449 if ((ps = strdup(s)) == NULL) 1450 err(1, "host_if: strdup"); 1451 while ((p = strrchr(ps, ':')) != NULL) { 1452 if (!strcmp(p+1, "network")) 1453 flags |= PFI_AFLAG_NETWORK; 1454 else if (!strcmp(p+1, "broadcast")) 1455 flags |= PFI_AFLAG_BROADCAST; 1456 else if (!strcmp(p+1, "peer")) 1457 flags |= PFI_AFLAG_PEER; 1458 else if (!strcmp(p+1, "0")) 1459 flags |= PFI_AFLAG_NOALIAS; 1460 else { 1461 free(ps); 1462 return (NULL); 1463 } 1464 *p = '\0'; 1465 } 1466 if (flags & (flags - 1) & PFI_AFLAG_MODEMASK) { /* Yep! */ 1467 fprintf(stderr, "illegal combination of interface modifiers\n"); 1468 free(ps); 1469 return (NULL); 1470 } 1471 if ((flags & (PFI_AFLAG_NETWORK|PFI_AFLAG_BROADCAST)) && mask > -1) { 1472 fprintf(stderr, "network or broadcast lookup, but " 1473 "extra netmask given\n"); 1474 free(ps); 1475 return (NULL); 1476 } 1477 if (ifa_exists(ps) || !strncmp(ps, "self", IFNAMSIZ)) { 1478 /* interface with this name exists */ 1479 h = ifa_lookup(ps, flags); 1480 for (n = h; n != NULL && mask > -1; n = n->next) 1481 set_ipmask(n, mask); 1482 } 1483 1484 free(ps); 1485 return (h); 1486 } 1487 1488 struct node_host * 1489 host_v4(const char *s, int mask) 1490 { 1491 struct node_host *h = NULL; 1492 struct in_addr ina; 1493 int bits = 32; 1494 1495 memset(&ina, 0, sizeof(struct in_addr)); 1496 if (strrchr(s, '/') != NULL) { 1497 if ((bits = inet_net_pton(AF_INET, s, &ina, sizeof(ina))) == -1) 1498 return (NULL); 1499 } else { 1500 if (inet_pton(AF_INET, s, &ina) != 1) 1501 return (NULL); 1502 } 1503 1504 h = calloc(1, sizeof(struct node_host)); 1505 if (h == NULL) 1506 err(1, "address: calloc"); 1507 h->ifname = NULL; 1508 h->af = AF_INET; 1509 h->addr.v.a.addr.addr32[0] = ina.s_addr; 1510 set_ipmask(h, bits); 1511 h->next = NULL; 1512 h->tail = h; 1513 1514 return (h); 1515 } 1516 1517 struct node_host * 1518 host_v6(const char *s, int mask) 1519 { 1520 struct addrinfo hints, *res; 1521 struct node_host *h = NULL; 1522 1523 memset(&hints, 0, sizeof(hints)); 1524 hints.ai_family = AF_INET6; 1525 hints.ai_socktype = SOCK_DGRAM; /*dummy*/ 1526 hints.ai_flags = AI_NUMERICHOST; 1527 if (getaddrinfo(s, "0", &hints, &res) == 0) { 1528 h = calloc(1, sizeof(struct node_host)); 1529 if (h == NULL) 1530 err(1, "address: calloc"); 1531 h->ifname = NULL; 1532 h->af = AF_INET6; 1533 memcpy(&h->addr.v.a.addr, 1534 &((struct sockaddr_in6 *)res->ai_addr)->sin6_addr, 1535 sizeof(h->addr.v.a.addr)); 1536 h->ifindex = 1537 ((struct sockaddr_in6 *)res->ai_addr)->sin6_scope_id; 1538 set_ipmask(h, mask); 1539 freeaddrinfo(res); 1540 h->next = NULL; 1541 h->tail = h; 1542 } 1543 1544 return (h); 1545 } 1546 1547 struct node_host * 1548 host_dns(const char *s, int v4mask, int v6mask) 1549 { 1550 struct addrinfo hints, *res0, *res; 1551 struct node_host *n, *h = NULL; 1552 int error, noalias = 0; 1553 int got4 = 0, got6 = 0; 1554 char *p, *ps; 1555 1556 if ((ps = strdup(s)) == NULL) 1557 err(1, "host_dns: strdup"); 1558 if ((p = strrchr(ps, ':')) != NULL && !strcmp(p, ":0")) { 1559 noalias = 1; 1560 *p = '\0'; 1561 } 1562 memset(&hints, 0, sizeof(hints)); 1563 hints.ai_family = PF_UNSPEC; 1564 hints.ai_socktype = SOCK_STREAM; /* DUMMY */ 1565 error = getaddrinfo(ps, NULL, &hints, &res0); 1566 if (error) { 1567 free(ps); 1568 return (h); 1569 } 1570 1571 for (res = res0; res; res = res->ai_next) { 1572 if (res->ai_family != AF_INET && 1573 res->ai_family != AF_INET6) 1574 continue; 1575 if (noalias) { 1576 if (res->ai_family == AF_INET) { 1577 if (got4) 1578 continue; 1579 got4 = 1; 1580 } else { 1581 if (got6) 1582 continue; 1583 got6 = 1; 1584 } 1585 } 1586 n = calloc(1, sizeof(struct node_host)); 1587 if (n == NULL) 1588 err(1, "host_dns: calloc"); 1589 n->ifname = NULL; 1590 n->af = res->ai_family; 1591 if (res->ai_family == AF_INET) { 1592 memcpy(&n->addr.v.a.addr, 1593 &((struct sockaddr_in *) 1594 res->ai_addr)->sin_addr.s_addr, 1595 sizeof(struct in_addr)); 1596 set_ipmask(n, v4mask); 1597 } else { 1598 memcpy(&n->addr.v.a.addr, 1599 &((struct sockaddr_in6 *) 1600 res->ai_addr)->sin6_addr.s6_addr, 1601 sizeof(struct in6_addr)); 1602 n->ifindex = 1603 ((struct sockaddr_in6 *) 1604 res->ai_addr)->sin6_scope_id; 1605 set_ipmask(n, v6mask); 1606 } 1607 n->next = NULL; 1608 n->tail = n; 1609 if (h == NULL) 1610 h = n; 1611 else { 1612 h->tail->next = n; 1613 h->tail = n; 1614 } 1615 } 1616 freeaddrinfo(res0); 1617 free(ps); 1618 1619 return (h); 1620 } 1621 1622 /* 1623 * convert a hostname to a list of addresses and put them in the given buffer. 1624 * test: 1625 * if set to 1, only simple addresses are accepted (no netblock, no "!"). 1626 */ 1627 int 1628 append_addr(struct pfr_buffer *b, char *s, int test) 1629 { 1630 char *r; 1631 struct node_host *h, *n; 1632 int rv, not = 0; 1633 1634 for (r = s; *r == '!'; r++) 1635 not = !not; 1636 if ((n = host(r)) == NULL) { 1637 errno = 0; 1638 return (-1); 1639 } 1640 rv = append_addr_host(b, n, test, not); 1641 do { 1642 h = n; 1643 n = n->next; 1644 free(h); 1645 } while (n != NULL); 1646 return (rv); 1647 } 1648 1649 /* 1650 * same as previous function, but with a pre-parsed input and the ability 1651 * to "negate" the result. Does not free the node_host list. 1652 * not: 1653 * setting it to 1 is equivalent to adding "!" in front of parameter s. 1654 */ 1655 int 1656 append_addr_host(struct pfr_buffer *b, struct node_host *n, int test, int not) 1657 { 1658 int bits; 1659 struct pfr_addr addr; 1660 1661 do { 1662 bzero(&addr, sizeof(addr)); 1663 addr.pfra_not = n->not ^ not; 1664 addr.pfra_af = n->af; 1665 addr.pfra_net = unmask(&n->addr.v.a.mask, n->af); 1666 switch (n->af) { 1667 case AF_INET: 1668 addr.pfra_ip4addr.s_addr = n->addr.v.a.addr.addr32[0]; 1669 bits = 32; 1670 break; 1671 case AF_INET6: 1672 memcpy(&addr.pfra_ip6addr, &n->addr.v.a.addr.v6, 1673 sizeof(struct in6_addr)); 1674 bits = 128; 1675 break; 1676 default: 1677 errno = EINVAL; 1678 return (-1); 1679 } 1680 if ((test && (not || addr.pfra_net != bits)) || 1681 addr.pfra_net > bits) { 1682 errno = EINVAL; 1683 return (-1); 1684 } 1685 if (pfr_buf_add(b, &addr)) 1686 return (-1); 1687 } while ((n = n->next) != NULL); 1688 1689 return (0); 1690 } 1691 1692 int 1693 pfctl_add_trans(struct pfr_buffer *buf, int rs_num, const char *anchor) 1694 { 1695 struct pfioc_trans_e trans; 1696 1697 bzero(&trans, sizeof(trans)); 1698 trans.rs_num = rs_num; 1699 if (strlcpy(trans.anchor, anchor, 1700 sizeof(trans.anchor)) >= sizeof(trans.anchor)) 1701 errx(1, "pfctl_add_trans: strlcpy"); 1702 1703 return pfr_buf_add(buf, &trans); 1704 } 1705 1706 u_int32_t 1707 pfctl_get_ticket(struct pfr_buffer *buf, int rs_num, const char *anchor) 1708 { 1709 struct pfioc_trans_e *p; 1710 1711 PFRB_FOREACH(p, buf) 1712 if (rs_num == p->rs_num && !strcmp(anchor, p->anchor)) 1713 return (p->ticket); 1714 errx(1, "pfctl_get_ticket: assertion failed"); 1715 } 1716 1717 int 1718 pfctl_trans(int dev, struct pfr_buffer *buf, u_long cmd, int from) 1719 { 1720 struct pfioc_trans trans; 1721 1722 bzero(&trans, sizeof(trans)); 1723 trans.size = buf->pfrb_size - from; 1724 trans.esize = sizeof(struct pfioc_trans_e); 1725 trans.array = ((struct pfioc_trans_e *)buf->pfrb_caddr) + from; 1726 return ioctl(dev, cmd, &trans); 1727 } 1728