pfctl_parser.c revision 171172
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/cdefs.h> 35__FBSDID("$FreeBSD: head/contrib/pf/pfctl/pfctl_parser.c 171172 2007-07-03 12:30:03Z mlaier $"); 36 37#include <sys/types.h> 38#include <sys/ioctl.h> 39#include <sys/socket.h> 40#include <sys/param.h> 41#include <sys/proc.h> 42#include <net/if.h> 43#include <netinet/in.h> 44#include <netinet/in_systm.h> 45#include <netinet/ip.h> 46#include <netinet/ip_icmp.h> 47#include <netinet/icmp6.h> 48#include <net/pfvar.h> 49#include <arpa/inet.h> 50 51#include <stdio.h> 52#include <stdlib.h> 53#include <string.h> 54#include <ctype.h> 55#include <limits.h> 56#include <netdb.h> 57#include <stdarg.h> 58#include <errno.h> 59#include <err.h> 60#include <ifaddrs.h> 61#include <unistd.h> 62 63#include "pfctl_parser.h" 64#include "pfctl.h" 65 66void print_op (u_int8_t, const char *, const char *); 67void print_port (u_int8_t, u_int16_t, u_int16_t, const char *); 68void print_ugid (u_int8_t, unsigned, unsigned, const char *, unsigned); 69void print_flags (u_int8_t); 70void print_fromto(struct pf_rule_addr *, pf_osfp_t, 71 struct pf_rule_addr *, u_int8_t, u_int8_t, int); 72int ifa_skip_if(const char *filter, struct node_host *p); 73 74struct node_host *ifa_grouplookup(const char *, int); 75struct node_host *host_if(const char *, int); 76struct node_host *host_v4(const char *, int); 77struct node_host *host_v6(const char *, int); 78struct node_host *host_dns(const char *, int, int); 79 80const char *tcpflags = "FSRPAUEW"; 81 82static const struct icmptypeent icmp_type[] = { 83 { "echoreq", ICMP_ECHO }, 84 { "echorep", ICMP_ECHOREPLY }, 85 { "unreach", ICMP_UNREACH }, 86 { "squench", ICMP_SOURCEQUENCH }, 87 { "redir", ICMP_REDIRECT }, 88 { "althost", ICMP_ALTHOSTADDR }, 89 { "routeradv", ICMP_ROUTERADVERT }, 90 { "routersol", ICMP_ROUTERSOLICIT }, 91 { "timex", ICMP_TIMXCEED }, 92 { "paramprob", ICMP_PARAMPROB }, 93 { "timereq", ICMP_TSTAMP }, 94 { "timerep", ICMP_TSTAMPREPLY }, 95 { "inforeq", ICMP_IREQ }, 96 { "inforep", ICMP_IREQREPLY }, 97 { "maskreq", ICMP_MASKREQ }, 98 { "maskrep", ICMP_MASKREPLY }, 99 { "trace", ICMP_TRACEROUTE }, 100 { "dataconv", ICMP_DATACONVERR }, 101 { "mobredir", ICMP_MOBILE_REDIRECT }, 102 { "ipv6-where", ICMP_IPV6_WHEREAREYOU }, 103 { "ipv6-here", ICMP_IPV6_IAMHERE }, 104 { "mobregreq", ICMP_MOBILE_REGREQUEST }, 105 { "mobregrep", ICMP_MOBILE_REGREPLY }, 106 { "skip", ICMP_SKIP }, 107 { "photuris", ICMP_PHOTURIS } 108}; 109 110static const struct icmptypeent icmp6_type[] = { 111 { "unreach", ICMP6_DST_UNREACH }, 112 { "toobig", ICMP6_PACKET_TOO_BIG }, 113 { "timex", ICMP6_TIME_EXCEEDED }, 114 { "paramprob", ICMP6_PARAM_PROB }, 115 { "echoreq", ICMP6_ECHO_REQUEST }, 116 { "echorep", ICMP6_ECHO_REPLY }, 117 { "groupqry", ICMP6_MEMBERSHIP_QUERY }, 118 { "listqry", MLD_LISTENER_QUERY }, 119 { "grouprep", ICMP6_MEMBERSHIP_REPORT }, 120 { "listenrep", MLD_LISTENER_REPORT }, 121 { "groupterm", ICMP6_MEMBERSHIP_REDUCTION }, 122 { "listendone", MLD_LISTENER_DONE }, 123 { "routersol", ND_ROUTER_SOLICIT }, 124 { "routeradv", ND_ROUTER_ADVERT }, 125 { "neighbrsol", ND_NEIGHBOR_SOLICIT }, 126 { "neighbradv", ND_NEIGHBOR_ADVERT }, 127 { "redir", ND_REDIRECT }, 128 { "routrrenum", ICMP6_ROUTER_RENUMBERING }, 129 { "wrureq", ICMP6_WRUREQUEST }, 130 { "wrurep", ICMP6_WRUREPLY }, 131 { "fqdnreq", ICMP6_FQDN_QUERY }, 132 { "fqdnrep", ICMP6_FQDN_REPLY }, 133 { "niqry", ICMP6_NI_QUERY }, 134 { "nirep", ICMP6_NI_REPLY }, 135 { "mtraceresp", MLD_MTRACE_RESP }, 136 { "mtrace", MLD_MTRACE } 137}; 138 139static const struct icmpcodeent icmp_code[] = { 140 { "net-unr", ICMP_UNREACH, ICMP_UNREACH_NET }, 141 { "host-unr", ICMP_UNREACH, ICMP_UNREACH_HOST }, 142 { "proto-unr", ICMP_UNREACH, ICMP_UNREACH_PROTOCOL }, 143 { "port-unr", ICMP_UNREACH, ICMP_UNREACH_PORT }, 144 { "needfrag", ICMP_UNREACH, ICMP_UNREACH_NEEDFRAG }, 145 { "srcfail", ICMP_UNREACH, ICMP_UNREACH_SRCFAIL }, 146 { "net-unk", ICMP_UNREACH, ICMP_UNREACH_NET_UNKNOWN }, 147 { "host-unk", ICMP_UNREACH, ICMP_UNREACH_HOST_UNKNOWN }, 148 { "isolate", ICMP_UNREACH, ICMP_UNREACH_ISOLATED }, 149 { "net-prohib", ICMP_UNREACH, ICMP_UNREACH_NET_PROHIB }, 150 { "host-prohib", ICMP_UNREACH, ICMP_UNREACH_HOST_PROHIB }, 151 { "net-tos", ICMP_UNREACH, ICMP_UNREACH_TOSNET }, 152 { "host-tos", ICMP_UNREACH, ICMP_UNREACH_TOSHOST }, 153 { "filter-prohib", ICMP_UNREACH, ICMP_UNREACH_FILTER_PROHIB }, 154 { "host-preced", ICMP_UNREACH, ICMP_UNREACH_HOST_PRECEDENCE }, 155 { "cutoff-preced", ICMP_UNREACH, ICMP_UNREACH_PRECEDENCE_CUTOFF }, 156 { "redir-net", ICMP_REDIRECT, ICMP_REDIRECT_NET }, 157 { "redir-host", ICMP_REDIRECT, ICMP_REDIRECT_HOST }, 158 { "redir-tos-net", ICMP_REDIRECT, ICMP_REDIRECT_TOSNET }, 159 { "redir-tos-host", ICMP_REDIRECT, ICMP_REDIRECT_TOSHOST }, 160 { "normal-adv", ICMP_ROUTERADVERT, ICMP_ROUTERADVERT_NORMAL }, 161 { "common-adv", ICMP_ROUTERADVERT, ICMP_ROUTERADVERT_NOROUTE_COMMON }, 162 { "transit", ICMP_TIMXCEED, ICMP_TIMXCEED_INTRANS }, 163 { "reassemb", ICMP_TIMXCEED, ICMP_TIMXCEED_REASS }, 164 { "badhead", ICMP_PARAMPROB, ICMP_PARAMPROB_ERRATPTR }, 165 { "optmiss", ICMP_PARAMPROB, ICMP_PARAMPROB_OPTABSENT }, 166 { "badlen", ICMP_PARAMPROB, ICMP_PARAMPROB_LENGTH }, 167 { "unknown-ind", ICMP_PHOTURIS, ICMP_PHOTURIS_UNKNOWN_INDEX }, 168 { "auth-fail", ICMP_PHOTURIS, ICMP_PHOTURIS_AUTH_FAILED }, 169 { "decrypt-fail", ICMP_PHOTURIS, ICMP_PHOTURIS_DECRYPT_FAILED } 170}; 171 172static const struct icmpcodeent icmp6_code[] = { 173 { "admin-unr", ICMP6_DST_UNREACH, ICMP6_DST_UNREACH_ADMIN }, 174 { "noroute-unr", ICMP6_DST_UNREACH, ICMP6_DST_UNREACH_NOROUTE }, 175 { "notnbr-unr", ICMP6_DST_UNREACH, ICMP6_DST_UNREACH_NOTNEIGHBOR }, 176 { "beyond-unr", ICMP6_DST_UNREACH, ICMP6_DST_UNREACH_BEYONDSCOPE }, 177 { "addr-unr", ICMP6_DST_UNREACH, ICMP6_DST_UNREACH_ADDR }, 178 { "port-unr", ICMP6_DST_UNREACH, ICMP6_DST_UNREACH_NOPORT }, 179 { "transit", ICMP6_TIME_EXCEEDED, ICMP6_TIME_EXCEED_TRANSIT }, 180 { "reassemb", ICMP6_TIME_EXCEEDED, ICMP6_TIME_EXCEED_REASSEMBLY }, 181 { "badhead", ICMP6_PARAM_PROB, ICMP6_PARAMPROB_HEADER }, 182 { "nxthdr", ICMP6_PARAM_PROB, ICMP6_PARAMPROB_NEXTHEADER }, 183 { "redironlink", ND_REDIRECT, ND_REDIRECT_ONLINK }, 184 { "redirrouter", ND_REDIRECT, ND_REDIRECT_ROUTER } 185}; 186 187const struct pf_timeout pf_timeouts[] = { 188 { "tcp.first", PFTM_TCP_FIRST_PACKET }, 189 { "tcp.opening", PFTM_TCP_OPENING }, 190 { "tcp.established", PFTM_TCP_ESTABLISHED }, 191 { "tcp.closing", PFTM_TCP_CLOSING }, 192 { "tcp.finwait", PFTM_TCP_FIN_WAIT }, 193 { "tcp.closed", PFTM_TCP_CLOSED }, 194 { "tcp.tsdiff", PFTM_TS_DIFF }, 195 { "udp.first", PFTM_UDP_FIRST_PACKET }, 196 { "udp.single", PFTM_UDP_SINGLE }, 197 { "udp.multiple", PFTM_UDP_MULTIPLE }, 198 { "icmp.first", PFTM_ICMP_FIRST_PACKET }, 199 { "icmp.error", PFTM_ICMP_ERROR_REPLY }, 200 { "other.first", PFTM_OTHER_FIRST_PACKET }, 201 { "other.single", PFTM_OTHER_SINGLE }, 202 { "other.multiple", PFTM_OTHER_MULTIPLE }, 203 { "frag", PFTM_FRAG }, 204 { "interval", PFTM_INTERVAL }, 205 { "adaptive.start", PFTM_ADAPTIVE_START }, 206 { "adaptive.end", PFTM_ADAPTIVE_END }, 207 { "src.track", PFTM_SRC_NODE }, 208 { NULL, 0 } 209}; 210 211const struct icmptypeent * 212geticmptypebynumber(u_int8_t type, sa_family_t af) 213{ 214 unsigned int i; 215 216 if (af != AF_INET6) { 217 for (i=0; i < (sizeof (icmp_type) / sizeof(icmp_type[0])); 218 i++) { 219 if (type == icmp_type[i].type) 220 return (&icmp_type[i]); 221 } 222 } else { 223 for (i=0; i < (sizeof (icmp6_type) / 224 sizeof(icmp6_type[0])); i++) { 225 if (type == icmp6_type[i].type) 226 return (&icmp6_type[i]); 227 } 228 } 229 return (NULL); 230} 231 232const struct icmptypeent * 233geticmptypebyname(char *w, sa_family_t af) 234{ 235 unsigned int i; 236 237 if (af != AF_INET6) { 238 for (i=0; i < (sizeof (icmp_type) / sizeof(icmp_type[0])); 239 i++) { 240 if (!strcmp(w, icmp_type[i].name)) 241 return (&icmp_type[i]); 242 } 243 } else { 244 for (i=0; i < (sizeof (icmp6_type) / 245 sizeof(icmp6_type[0])); i++) { 246 if (!strcmp(w, icmp6_type[i].name)) 247 return (&icmp6_type[i]); 248 } 249 } 250 return (NULL); 251} 252 253const struct icmpcodeent * 254geticmpcodebynumber(u_int8_t type, u_int8_t code, sa_family_t af) 255{ 256 unsigned int i; 257 258 if (af != AF_INET6) { 259 for (i=0; i < (sizeof (icmp_code) / sizeof(icmp_code[0])); 260 i++) { 261 if (type == icmp_code[i].type && 262 code == icmp_code[i].code) 263 return (&icmp_code[i]); 264 } 265 } else { 266 for (i=0; i < (sizeof (icmp6_code) / 267 sizeof(icmp6_code[0])); i++) { 268 if (type == icmp6_code[i].type && 269 code == icmp6_code[i].code) 270 return (&icmp6_code[i]); 271 } 272 } 273 return (NULL); 274} 275 276const struct icmpcodeent * 277geticmpcodebyname(u_long type, char *w, sa_family_t af) 278{ 279 unsigned int i; 280 281 if (af != AF_INET6) { 282 for (i=0; i < (sizeof (icmp_code) / sizeof(icmp_code[0])); 283 i++) { 284 if (type == icmp_code[i].type && 285 !strcmp(w, icmp_code[i].name)) 286 return (&icmp_code[i]); 287 } 288 } else { 289 for (i=0; i < (sizeof (icmp6_code) / 290 sizeof(icmp6_code[0])); i++) { 291 if (type == icmp6_code[i].type && 292 !strcmp(w, icmp6_code[i].name)) 293 return (&icmp6_code[i]); 294 } 295 } 296 return (NULL); 297} 298 299void 300print_op(u_int8_t op, const char *a1, const char *a2) 301{ 302 if (op == PF_OP_IRG) 303 printf(" %s >< %s", a1, a2); 304 else if (op == PF_OP_XRG) 305 printf(" %s <> %s", a1, a2); 306 else if (op == PF_OP_EQ) 307 printf(" = %s", a1); 308 else if (op == PF_OP_NE) 309 printf(" != %s", a1); 310 else if (op == PF_OP_LT) 311 printf(" < %s", a1); 312 else if (op == PF_OP_LE) 313 printf(" <= %s", a1); 314 else if (op == PF_OP_GT) 315 printf(" > %s", a1); 316 else if (op == PF_OP_GE) 317 printf(" >= %s", a1); 318 else if (op == PF_OP_RRG) 319 printf(" %s:%s", a1, a2); 320} 321 322void 323print_port(u_int8_t op, u_int16_t p1, u_int16_t p2, const char *proto) 324{ 325 char a1[6], a2[6]; 326 struct servent *s; 327 328 s = getservbyport(p1, proto); 329 p1 = ntohs(p1); 330 p2 = ntohs(p2); 331 snprintf(a1, sizeof(a1), "%u", p1); 332 snprintf(a2, sizeof(a2), "%u", p2); 333 printf(" port"); 334 if (s != NULL && (op == PF_OP_EQ || op == PF_OP_NE)) 335 print_op(op, s->s_name, a2); 336 else 337 print_op(op, a1, a2); 338} 339 340void 341print_ugid(u_int8_t op, unsigned u1, unsigned u2, const char *t, unsigned umax) 342{ 343 char a1[11], a2[11]; 344 345 snprintf(a1, sizeof(a1), "%u", u1); 346 snprintf(a2, sizeof(a2), "%u", u2); 347 printf(" %s", t); 348 if (u1 == umax && (op == PF_OP_EQ || op == PF_OP_NE)) 349 print_op(op, "unknown", a2); 350 else 351 print_op(op, a1, a2); 352} 353 354void 355print_flags(u_int8_t f) 356{ 357 int i; 358 359 for (i = 0; tcpflags[i]; ++i) 360 if (f & (1 << i)) 361 printf("%c", tcpflags[i]); 362} 363 364void 365print_fromto(struct pf_rule_addr *src, pf_osfp_t osfp, struct pf_rule_addr *dst, 366 sa_family_t af, u_int8_t proto, int verbose) 367{ 368 char buf[PF_OSFP_LEN*3]; 369 if (src->addr.type == PF_ADDR_ADDRMASK && 370 dst->addr.type == PF_ADDR_ADDRMASK && 371 PF_AZERO(&src->addr.v.a.addr, AF_INET6) && 372 PF_AZERO(&src->addr.v.a.mask, AF_INET6) && 373 PF_AZERO(&dst->addr.v.a.addr, AF_INET6) && 374 PF_AZERO(&dst->addr.v.a.mask, AF_INET6) && 375 !src->neg && !dst->neg && 376 !src->port_op && !dst->port_op && 377 osfp == PF_OSFP_ANY) 378 printf(" all"); 379 else { 380 printf(" from "); 381 if (src->neg) 382 printf("! "); 383 print_addr(&src->addr, af, verbose); 384 if (src->port_op) 385 print_port(src->port_op, src->port[0], 386 src->port[1], 387 proto == IPPROTO_TCP ? "tcp" : "udp"); 388 if (osfp != PF_OSFP_ANY) 389 printf(" os \"%s\"", pfctl_lookup_fingerprint(osfp, buf, 390 sizeof(buf))); 391 392 printf(" to "); 393 if (dst->neg) 394 printf("! "); 395 print_addr(&dst->addr, af, verbose); 396 if (dst->port_op) 397 print_port(dst->port_op, dst->port[0], 398 dst->port[1], 399 proto == IPPROTO_TCP ? "tcp" : "udp"); 400 } 401} 402 403void 404print_pool(struct pf_pool *pool, u_int16_t p1, u_int16_t p2, 405 sa_family_t af, int id) 406{ 407 struct pf_pooladdr *pooladdr; 408 409 if ((TAILQ_FIRST(&pool->list) != NULL) && 410 TAILQ_NEXT(TAILQ_FIRST(&pool->list), entries) != NULL) 411 printf("{ "); 412 TAILQ_FOREACH(pooladdr, &pool->list, entries){ 413 switch (id) { 414 case PF_NAT: 415 case PF_RDR: 416 case PF_BINAT: 417 print_addr(&pooladdr->addr, af, 0); 418 break; 419 case PF_PASS: 420 if (PF_AZERO(&pooladdr->addr.v.a.addr, af)) 421 printf("%s", pooladdr->ifname); 422 else { 423 printf("(%s ", pooladdr->ifname); 424 print_addr(&pooladdr->addr, af, 0); 425 printf(")"); 426 } 427 break; 428 default: 429 break; 430 } 431 if (TAILQ_NEXT(pooladdr, entries) != NULL) 432 printf(", "); 433 else if (TAILQ_NEXT(TAILQ_FIRST(&pool->list), entries) != NULL) 434 printf(" }"); 435 } 436 switch (id) { 437 case PF_NAT: 438 if ((p1 != PF_NAT_PROXY_PORT_LOW || 439 p2 != PF_NAT_PROXY_PORT_HIGH) && (p1 != 0 || p2 != 0)) { 440 if (p1 == p2) 441 printf(" port %u", p1); 442 else 443 printf(" port %u:%u", p1, p2); 444 } 445 break; 446 case PF_RDR: 447 if (p1) { 448 printf(" port %u", p1); 449 if (p2 && (p2 != p1)) 450 printf(":%u", p2); 451 } 452 break; 453 default: 454 break; 455 } 456 switch (pool->opts & PF_POOL_TYPEMASK) { 457 case PF_POOL_NONE: 458 break; 459 case PF_POOL_BITMASK: 460 printf(" bitmask"); 461 break; 462 case PF_POOL_RANDOM: 463 printf(" random"); 464 break; 465 case PF_POOL_SRCHASH: 466 printf(" source-hash 0x%08x%08x%08x%08x", 467 pool->key.key32[0], pool->key.key32[1], 468 pool->key.key32[2], pool->key.key32[3]); 469 break; 470 case PF_POOL_ROUNDROBIN: 471 printf(" round-robin"); 472 break; 473 } 474 if (pool->opts & PF_POOL_STICKYADDR) 475 printf(" sticky-address"); 476 if (id == PF_NAT && p1 == 0 && p2 == 0) 477 printf(" static-port"); 478} 479 480const char *pf_reasons[PFRES_MAX+1] = PFRES_NAMES; 481const char *pf_lcounters[LCNT_MAX+1] = LCNT_NAMES; 482const char *pf_fcounters[FCNT_MAX+1] = FCNT_NAMES; 483const char *pf_scounters[FCNT_MAX+1] = FCNT_NAMES; 484 485void 486print_status(struct pf_status *s, int opts) 487{ 488 char statline[80], *running; 489 time_t runtime; 490 int i; 491 char buf[PF_MD5_DIGEST_LENGTH * 2 + 1]; 492 static const char hex[] = "0123456789abcdef"; 493 494 runtime = time(NULL) - s->since; 495 running = s->running ? "Enabled" : "Disabled"; 496 497 if (s->since) { 498 unsigned sec, min, hrs, day = runtime; 499 500 sec = day % 60; 501 day /= 60; 502 min = day % 60; 503 day /= 60; 504 hrs = day % 24; 505 day /= 24; 506 snprintf(statline, sizeof(statline), 507 "Status: %s for %u days %.2u:%.2u:%.2u", 508 running, day, hrs, min, sec); 509 } else 510 snprintf(statline, sizeof(statline), "Status: %s", running); 511 printf("%-44s", statline); 512 switch (s->debug) { 513 case PF_DEBUG_NONE: 514 printf("%15s\n\n", "Debug: None"); 515 break; 516 case PF_DEBUG_URGENT: 517 printf("%15s\n\n", "Debug: Urgent"); 518 break; 519 case PF_DEBUG_MISC: 520 printf("%15s\n\n", "Debug: Misc"); 521 break; 522 case PF_DEBUG_NOISY: 523 printf("%15s\n\n", "Debug: Loud"); 524 break; 525 } 526 527 if (opts & PF_OPT_VERBOSE) { 528 printf("Hostid: 0x%08x\n", ntohl(s->hostid)); 529 530 for (i = 0; i < PF_MD5_DIGEST_LENGTH; i++) { 531 buf[i + i] = hex[s->pf_chksum[i] >> 4]; 532 buf[i + i + 1] = hex[s->pf_chksum[i] & 0x0f]; 533 } 534 buf[i + i] = '\0'; 535 printf("Checksum: 0x%s\n\n", buf); 536 } 537 538 if (s->ifname[0] != 0) { 539 printf("Interface Stats for %-16s %5s %16s\n", 540 s->ifname, "IPv4", "IPv6"); 541 printf(" %-25s %14llu %16llu\n", "Bytes In", 542 (unsigned long long)s->bcounters[0][0], 543 (unsigned long long)s->bcounters[1][0]); 544 printf(" %-25s %14llu %16llu\n", "Bytes Out", 545 (unsigned long long)s->bcounters[0][1], 546 (unsigned long long)s->bcounters[1][1]); 547 printf(" Packets In\n"); 548 printf(" %-23s %14llu %16llu\n", "Passed", 549 (unsigned long long)s->pcounters[0][0][PF_PASS], 550 (unsigned long long)s->pcounters[1][0][PF_PASS]); 551 printf(" %-23s %14llu %16llu\n", "Blocked", 552 (unsigned long long)s->pcounters[0][0][PF_DROP], 553 (unsigned long long)s->pcounters[1][0][PF_DROP]); 554 printf(" Packets Out\n"); 555 printf(" %-23s %14llu %16llu\n", "Passed", 556 (unsigned long long)s->pcounters[0][1][PF_PASS], 557 (unsigned long long)s->pcounters[1][1][PF_PASS]); 558 printf(" %-23s %14llu %16llu\n\n", "Blocked", 559 (unsigned long long)s->pcounters[0][1][PF_DROP], 560 (unsigned long long)s->pcounters[1][1][PF_DROP]); 561 } 562 printf("%-27s %14s %16s\n", "State Table", "Total", "Rate"); 563 printf(" %-25s %14u %14s\n", "current entries", s->states, ""); 564 for (i = 0; i < FCNT_MAX; i++) { 565 printf(" %-25s %14llu ", pf_fcounters[i], 566 (unsigned long long)s->fcounters[i]); 567 if (runtime > 0) 568 printf("%14.1f/s\n", 569 (double)s->fcounters[i] / (double)runtime); 570 else 571 printf("%14s\n", ""); 572 } 573 if (opts & PF_OPT_VERBOSE) { 574 printf("Source Tracking Table\n"); 575 printf(" %-25s %14u %14s\n", "current entries", 576 s->src_nodes, ""); 577 for (i = 0; i < SCNT_MAX; i++) { 578 printf(" %-25s %14lld ", pf_scounters[i], 579 (unsigned long long)s->scounters[i]); 580 if (runtime > 0) 581 printf("%14.1f/s\n", 582 (double)s->scounters[i] / (double)runtime); 583 else 584 printf("%14s\n", ""); 585 } 586 } 587 printf("Counters\n"); 588 for (i = 0; i < PFRES_MAX; i++) { 589 printf(" %-25s %14llu ", pf_reasons[i], 590 (unsigned long long)s->counters[i]); 591 if (runtime > 0) 592 printf("%14.1f/s\n", 593 (double)s->counters[i] / (double)runtime); 594 else 595 printf("%14s\n", ""); 596 } 597 if (opts & PF_OPT_VERBOSE) { 598 printf("Limit Counters\n"); 599 for (i = 0; i < LCNT_MAX; i++) { 600 printf(" %-25s %14lld ", pf_lcounters[i], 601#ifdef __FreeBSD__ 602 (unsigned long long)s->lcounters[i]); 603#else 604 s->lcounters[i]); 605#endif 606 if (runtime > 0) 607 printf("%14.1f/s\n", 608 (double)s->lcounters[i] / (double)runtime); 609 else 610 printf("%14s\n", ""); 611 } 612 } 613} 614 615void 616print_src_node(struct pf_src_node *sn, int opts) 617{ 618 struct pf_addr_wrap aw; 619 int min, sec; 620 621 memset(&aw, 0, sizeof(aw)); 622 if (sn->af == AF_INET) 623 aw.v.a.mask.addr32[0] = 0xffffffff; 624 else 625 memset(&aw.v.a.mask, 0xff, sizeof(aw.v.a.mask)); 626 627 aw.v.a.addr = sn->addr; 628 print_addr(&aw, sn->af, opts & PF_OPT_VERBOSE2); 629 printf(" -> "); 630 aw.v.a.addr = sn->raddr; 631 print_addr(&aw, sn->af, opts & PF_OPT_VERBOSE2); 632 printf(" ( states %u, connections %u, rate %u.%u/%us )\n", sn->states, 633 sn->conn, sn->conn_rate.count / 1000, 634 (sn->conn_rate.count % 1000) / 100, sn->conn_rate.seconds); 635 if (opts & PF_OPT_VERBOSE) { 636 sec = sn->creation % 60; 637 sn->creation /= 60; 638 min = sn->creation % 60; 639 sn->creation /= 60; 640 printf(" age %.2u:%.2u:%.2u", sn->creation, min, sec); 641 if (sn->states == 0) { 642 sec = sn->expire % 60; 643 sn->expire /= 60; 644 min = sn->expire % 60; 645 sn->expire /= 60; 646 printf(", expires in %.2u:%.2u:%.2u", 647 sn->expire, min, sec); 648 } 649 printf(", %llu pkts, %llu bytes", 650#ifdef __FreeBSD__ 651 (unsigned long long)(sn->packets[0] + sn->packets[1]), 652 (unsigned long long)(sn->bytes[0] + sn->bytes[1])); 653#else 654 sn->packets[0] + sn->packets[1], 655 sn->bytes[0] + sn->bytes[1]); 656#endif 657 switch (sn->ruletype) { 658 case PF_NAT: 659 if (sn->rule.nr != -1) 660 printf(", nat rule %u", sn->rule.nr); 661 break; 662 case PF_RDR: 663 if (sn->rule.nr != -1) 664 printf(", rdr rule %u", sn->rule.nr); 665 break; 666 case PF_PASS: 667 if (sn->rule.nr != -1) 668 printf(", filter rule %u", sn->rule.nr); 669 break; 670 } 671 printf("\n"); 672 } 673} 674 675void 676print_rule(struct pf_rule *r, const char *anchor_call, int verbose) 677{ 678 static const char *actiontypes[] = { "pass", "block", "scrub", 679 "no scrub", "nat", "no nat", "binat", "no binat", "rdr", "no rdr" }; 680 static const char *anchortypes[] = { "anchor", "anchor", "anchor", 681 "anchor", "nat-anchor", "nat-anchor", "binat-anchor", 682 "binat-anchor", "rdr-anchor", "rdr-anchor" }; 683 int i, opts; 684 685 if (verbose) 686 printf("@%d ", r->nr); 687 if (r->action > PF_NORDR) 688 printf("action(%d)", r->action); 689 else if (anchor_call[0]) { 690 if (anchor_call[0] == '_') { 691 printf("%s", anchortypes[r->action]); 692 } else 693 printf("%s \"%s\"", anchortypes[r->action], 694 anchor_call); 695 } else { 696 printf("%s", actiontypes[r->action]); 697 if (r->natpass) 698 printf(" pass"); 699 } 700 if (r->action == PF_DROP) { 701 if (r->rule_flag & PFRULE_RETURN) 702 printf(" return"); 703 else if (r->rule_flag & PFRULE_RETURNRST) { 704 if (!r->return_ttl) 705 printf(" return-rst"); 706 else 707 printf(" return-rst(ttl %d)", r->return_ttl); 708 } else if (r->rule_flag & PFRULE_RETURNICMP) { 709 const struct icmpcodeent *ic, *ic6; 710 711 ic = geticmpcodebynumber(r->return_icmp >> 8, 712 r->return_icmp & 255, AF_INET); 713 ic6 = geticmpcodebynumber(r->return_icmp6 >> 8, 714 r->return_icmp6 & 255, AF_INET6); 715 716 switch (r->af) { 717 case AF_INET: 718 printf(" return-icmp"); 719 if (ic == NULL) 720 printf("(%u)", r->return_icmp & 255); 721 else 722 printf("(%s)", ic->name); 723 break; 724 case AF_INET6: 725 printf(" return-icmp6"); 726 if (ic6 == NULL) 727 printf("(%u)", r->return_icmp6 & 255); 728 else 729 printf("(%s)", ic6->name); 730 break; 731 default: 732 printf(" return-icmp"); 733 if (ic == NULL) 734 printf("(%u, ", r->return_icmp & 255); 735 else 736 printf("(%s, ", ic->name); 737 if (ic6 == NULL) 738 printf("%u)", r->return_icmp6 & 255); 739 else 740 printf("%s)", ic6->name); 741 break; 742 } 743 } else 744 printf(" drop"); 745 } 746 if (r->direction == PF_IN) 747 printf(" in"); 748 else if (r->direction == PF_OUT) 749 printf(" out"); 750 if (r->log) { 751 printf(" log"); 752 if (r->log & ~PF_LOG || r->logif) { 753 int count = 0; 754 755 printf(" ("); 756 if (r->log & PF_LOG_ALL) 757 printf("%sall", count++ ? ", " : ""); 758 if (r->log & PF_LOG_SOCKET_LOOKUP) 759 printf("%suser", count++ ? ", " : ""); 760 if (r->logif) 761 printf("%sto pflog%u", count++ ? ", " : "", 762 r->logif); 763 printf(")"); 764 } 765 } 766 if (r->quick) 767 printf(" quick"); 768 if (r->ifname[0]) { 769 if (r->ifnot) 770 printf(" on ! %s", r->ifname); 771 else 772 printf(" on %s", r->ifname); 773 } 774 if (r->rt) { 775 if (r->rt == PF_ROUTETO) 776 printf(" route-to"); 777 else if (r->rt == PF_REPLYTO) 778 printf(" reply-to"); 779 else if (r->rt == PF_DUPTO) 780 printf(" dup-to"); 781 else if (r->rt == PF_FASTROUTE) 782 printf(" fastroute"); 783 if (r->rt != PF_FASTROUTE) { 784 printf(" "); 785 print_pool(&r->rpool, 0, 0, r->af, PF_PASS); 786 } 787 } 788 if (r->af) { 789 if (r->af == AF_INET) 790 printf(" inet"); 791 else 792 printf(" inet6"); 793 } 794 if (r->proto) { 795 struct protoent *p; 796 797 if ((p = getprotobynumber(r->proto)) != NULL) 798 printf(" proto %s", p->p_name); 799 else 800 printf(" proto %u", r->proto); 801 } 802 print_fromto(&r->src, r->os_fingerprint, &r->dst, r->af, r->proto, 803 verbose); 804 if (r->uid.op) 805 print_ugid(r->uid.op, r->uid.uid[0], r->uid.uid[1], "user", 806 UID_MAX); 807 if (r->gid.op) 808 print_ugid(r->gid.op, r->gid.gid[0], r->gid.gid[1], "group", 809 GID_MAX); 810 if (r->flags || r->flagset) { 811 printf(" flags "); 812 print_flags(r->flags); 813 printf("/"); 814 print_flags(r->flagset); 815 } else if (r->action == PF_PASS && 816 (!r->proto || r->proto == IPPROTO_TCP) && 817 !(r->rule_flag & PFRULE_FRAGMENT) && 818 !anchor_call[0] && r->keep_state) 819 printf(" flags any"); 820 if (r->type) { 821 const struct icmptypeent *it; 822 823 it = geticmptypebynumber(r->type-1, r->af); 824 if (r->af != AF_INET6) 825 printf(" icmp-type"); 826 else 827 printf(" icmp6-type"); 828 if (it != NULL) 829 printf(" %s", it->name); 830 else 831 printf(" %u", r->type-1); 832 if (r->code) { 833 const struct icmpcodeent *ic; 834 835 ic = geticmpcodebynumber(r->type-1, r->code-1, r->af); 836 if (ic != NULL) 837 printf(" code %s", ic->name); 838 else 839 printf(" code %u", r->code-1); 840 } 841 } 842 if (r->tos) 843 printf(" tos 0x%2.2x", r->tos); 844 if (!r->keep_state && r->action == PF_PASS && !anchor_call[0]) 845 printf(" no state"); 846 else if (r->keep_state == PF_STATE_NORMAL) 847 printf(" keep state"); 848 else if (r->keep_state == PF_STATE_MODULATE) 849 printf(" modulate state"); 850 else if (r->keep_state == PF_STATE_SYNPROXY) 851 printf(" synproxy state"); 852 if (r->prob) { 853 char buf[20]; 854 855 snprintf(buf, sizeof(buf), "%f", r->prob*100.0/(UINT_MAX+1.0)); 856 for (i = strlen(buf)-1; i > 0; i--) { 857 if (buf[i] == '0') 858 buf[i] = '\0'; 859 else { 860 if (buf[i] == '.') 861 buf[i] = '\0'; 862 break; 863 } 864 } 865 printf(" probability %s%%", buf); 866 } 867 opts = 0; 868 if (r->max_states || r->max_src_nodes || r->max_src_states) 869 opts = 1; 870 if (r->rule_flag & PFRULE_NOSYNC) 871 opts = 1; 872 if (r->rule_flag & PFRULE_SRCTRACK) 873 opts = 1; 874 if (r->rule_flag & PFRULE_IFBOUND) 875 opts = 1; 876 for (i = 0; !opts && i < PFTM_MAX; ++i) 877 if (r->timeout[i]) 878 opts = 1; 879 if (opts) { 880 printf(" ("); 881 if (r->max_states) { 882 printf("max %u", r->max_states); 883 opts = 0; 884 } 885 if (r->rule_flag & PFRULE_NOSYNC) { 886 if (!opts) 887 printf(", "); 888 printf("no-sync"); 889 opts = 0; 890 } 891 if (r->rule_flag & PFRULE_SRCTRACK) { 892 if (!opts) 893 printf(", "); 894 printf("source-track"); 895 if (r->rule_flag & PFRULE_RULESRCTRACK) 896 printf(" rule"); 897 else 898 printf(" global"); 899 opts = 0; 900 } 901 if (r->max_src_states) { 902 if (!opts) 903 printf(", "); 904 printf("max-src-states %u", r->max_src_states); 905 opts = 0; 906 } 907 if (r->max_src_conn) { 908 if (!opts) 909 printf(", "); 910 printf("max-src-conn %u", r->max_src_conn); 911 opts = 0; 912 } 913 if (r->max_src_conn_rate.limit) { 914 if (!opts) 915 printf(", "); 916 printf("max-src-conn-rate %u/%u", 917 r->max_src_conn_rate.limit, 918 r->max_src_conn_rate.seconds); 919 opts = 0; 920 } 921 if (r->max_src_nodes) { 922 if (!opts) 923 printf(", "); 924 printf("max-src-nodes %u", r->max_src_nodes); 925 opts = 0; 926 } 927 if (r->overload_tblname[0]) { 928 if (!opts) 929 printf(", "); 930 printf("overload <%s>", r->overload_tblname); 931 if (r->flush) 932 printf(" flush"); 933 if (r->flush & PF_FLUSH_GLOBAL) 934 printf(" global"); 935 } 936 if (r->rule_flag & PFRULE_IFBOUND) { 937 if (!opts) 938 printf(", "); 939 printf("if-bound"); 940 opts = 0; 941 } 942 for (i = 0; i < PFTM_MAX; ++i) 943 if (r->timeout[i]) { 944 int j; 945 946 if (!opts) 947 printf(", "); 948 opts = 0; 949 for (j = 0; pf_timeouts[j].name != NULL; 950 ++j) 951 if (pf_timeouts[j].timeout == i) 952 break; 953 printf("%s %u", pf_timeouts[j].name == NULL ? 954 "inv.timeout" : pf_timeouts[j].name, 955 r->timeout[i]); 956 } 957 printf(")"); 958 } 959 if (r->rule_flag & PFRULE_FRAGMENT) 960 printf(" fragment"); 961 if (r->rule_flag & PFRULE_NODF) 962 printf(" no-df"); 963 if (r->rule_flag & PFRULE_RANDOMID) 964 printf(" random-id"); 965 if (r->min_ttl) 966 printf(" min-ttl %d", r->min_ttl); 967 if (r->max_mss) 968 printf(" max-mss %d", r->max_mss); 969 if (r->allow_opts) 970 printf(" allow-opts"); 971 if (r->action == PF_SCRUB) { 972 if (r->rule_flag & PFRULE_REASSEMBLE_TCP) 973 printf(" reassemble tcp"); 974 975 if (r->rule_flag & PFRULE_FRAGDROP) 976 printf(" fragment drop-ovl"); 977 else if (r->rule_flag & PFRULE_FRAGCROP) 978 printf(" fragment crop"); 979 else 980 printf(" fragment reassemble"); 981 } 982 if (r->label[0]) 983 printf(" label \"%s\"", r->label); 984 if (r->qname[0] && r->pqname[0]) 985 printf(" queue(%s, %s)", r->qname, r->pqname); 986 else if (r->qname[0]) 987 printf(" queue %s", r->qname); 988 if (r->tagname[0]) 989 printf(" tag %s", r->tagname); 990 if (r->match_tagname[0]) { 991 if (r->match_tag_not) 992 printf(" !"); 993 printf(" tagged %s", r->match_tagname); 994 } 995 if (r->rtableid != -1) 996 printf(" rtable %u", r->rtableid); 997 if (!anchor_call[0] && (r->action == PF_NAT || 998 r->action == PF_BINAT || r->action == PF_RDR)) { 999 printf(" -> "); 1000 print_pool(&r->rpool, r->rpool.proxy_port[0], 1001 r->rpool.proxy_port[1], r->af, r->action); 1002 } 1003} 1004 1005void 1006print_tabledef(const char *name, int flags, int addrs, 1007 struct node_tinithead *nodes) 1008{ 1009 struct node_tinit *ti, *nti; 1010 struct node_host *h; 1011 1012 printf("table <%s>", name); 1013 if (flags & PFR_TFLAG_CONST) 1014 printf(" const"); 1015 if (flags & PFR_TFLAG_PERSIST) 1016 printf(" persist"); 1017 SIMPLEQ_FOREACH(ti, nodes, entries) { 1018 if (ti->file) { 1019 printf(" file \"%s\"", ti->file); 1020 continue; 1021 } 1022 printf(" {"); 1023 for (;;) { 1024 for (h = ti->host; h != NULL; h = h->next) { 1025 printf(h->not ? " !" : " "); 1026 print_addr(&h->addr, h->af, 0); 1027 } 1028 nti = SIMPLEQ_NEXT(ti, entries); 1029 if (nti != NULL && nti->file == NULL) 1030 ti = nti; /* merge lists */ 1031 else 1032 break; 1033 } 1034 printf(" }"); 1035 } 1036 if (addrs && SIMPLEQ_EMPTY(nodes)) 1037 printf(" { }"); 1038 printf("\n"); 1039} 1040 1041int 1042parse_flags(char *s) 1043{ 1044 char *p, *q; 1045 u_int8_t f = 0; 1046 1047 for (p = s; *p; p++) { 1048 if ((q = strchr(tcpflags, *p)) == NULL) 1049 return -1; 1050 else 1051 f |= 1 << (q - tcpflags); 1052 } 1053 return (f ? f : PF_TH_ALL); 1054} 1055 1056void 1057set_ipmask(struct node_host *h, u_int8_t b) 1058{ 1059 struct pf_addr *m, *n; 1060 int i, j = 0; 1061 1062 m = &h->addr.v.a.mask; 1063 memset(m, 0, sizeof(*m)); 1064 1065 while (b >= 32) { 1066 m->addr32[j++] = 0xffffffff; 1067 b -= 32; 1068 } 1069 for (i = 31; i > 31-b; --i) 1070 m->addr32[j] |= (1 << i); 1071 if (b) 1072 m->addr32[j] = htonl(m->addr32[j]); 1073 1074 /* Mask off bits of the address that will never be used. */ 1075 n = &h->addr.v.a.addr; 1076 if (h->addr.type == PF_ADDR_ADDRMASK) 1077 for (i = 0; i < 4; i++) 1078 n->addr32[i] = n->addr32[i] & m->addr32[i]; 1079} 1080 1081int 1082check_netmask(struct node_host *h, sa_family_t af) 1083{ 1084 struct node_host *n = NULL; 1085 struct pf_addr *m; 1086 1087 for (n = h; n != NULL; n = n->next) { 1088 if (h->addr.type == PF_ADDR_TABLE) 1089 continue; 1090 m = &h->addr.v.a.mask; 1091 /* fix up netmask for dynaddr */ 1092 if (af == AF_INET && h->addr.type == PF_ADDR_DYNIFTL && 1093 unmask(m, AF_INET6) > 32) 1094 set_ipmask(n, 32); 1095 /* netmasks > 32 bit are invalid on v4 */ 1096 if (af == AF_INET && 1097 (m->addr32[1] || m->addr32[2] || m->addr32[3])) { 1098 fprintf(stderr, "netmask %u invalid for IPv4 address\n", 1099 unmask(m, AF_INET6)); 1100 return (1); 1101 } 1102 } 1103 return (0); 1104} 1105 1106/* interface lookup routines */ 1107 1108struct node_host *iftab; 1109 1110void 1111ifa_load(void) 1112{ 1113 struct ifaddrs *ifap, *ifa; 1114 struct node_host *n = NULL, *h = NULL; 1115 1116 if (getifaddrs(&ifap) < 0) 1117 err(1, "getifaddrs"); 1118 1119 for (ifa = ifap; ifa; ifa = ifa->ifa_next) { 1120 if (!(ifa->ifa_addr->sa_family == AF_INET || 1121 ifa->ifa_addr->sa_family == AF_INET6 || 1122 ifa->ifa_addr->sa_family == AF_LINK)) 1123 continue; 1124 n = calloc(1, sizeof(struct node_host)); 1125 if (n == NULL) 1126 err(1, "address: calloc"); 1127 n->af = ifa->ifa_addr->sa_family; 1128 n->ifa_flags = ifa->ifa_flags; 1129#ifdef __KAME__ 1130 if (n->af == AF_INET6 && 1131 IN6_IS_ADDR_LINKLOCAL(&((struct sockaddr_in6 *) 1132 ifa->ifa_addr)->sin6_addr) && 1133 ((struct sockaddr_in6 *)ifa->ifa_addr)->sin6_scope_id == 1134 0) { 1135 struct sockaddr_in6 *sin6; 1136 1137 sin6 = (struct sockaddr_in6 *)ifa->ifa_addr; 1138 sin6->sin6_scope_id = sin6->sin6_addr.s6_addr[2] << 8 | 1139 sin6->sin6_addr.s6_addr[3]; 1140 sin6->sin6_addr.s6_addr[2] = 0; 1141 sin6->sin6_addr.s6_addr[3] = 0; 1142 } 1143#endif 1144 n->ifindex = 0; 1145 if (n->af == AF_INET) { 1146 memcpy(&n->addr.v.a.addr, &((struct sockaddr_in *) 1147 ifa->ifa_addr)->sin_addr.s_addr, 1148 sizeof(struct in_addr)); 1149 memcpy(&n->addr.v.a.mask, &((struct sockaddr_in *) 1150 ifa->ifa_netmask)->sin_addr.s_addr, 1151 sizeof(struct in_addr)); 1152 if (ifa->ifa_broadaddr != NULL) 1153 memcpy(&n->bcast, &((struct sockaddr_in *) 1154 ifa->ifa_broadaddr)->sin_addr.s_addr, 1155 sizeof(struct in_addr)); 1156 if (ifa->ifa_dstaddr != NULL) 1157 memcpy(&n->peer, &((struct sockaddr_in *) 1158 ifa->ifa_dstaddr)->sin_addr.s_addr, 1159 sizeof(struct in_addr)); 1160 } else if (n->af == AF_INET6) { 1161 memcpy(&n->addr.v.a.addr, &((struct sockaddr_in6 *) 1162 ifa->ifa_addr)->sin6_addr.s6_addr, 1163 sizeof(struct in6_addr)); 1164 memcpy(&n->addr.v.a.mask, &((struct sockaddr_in6 *) 1165 ifa->ifa_netmask)->sin6_addr.s6_addr, 1166 sizeof(struct in6_addr)); 1167 if (ifa->ifa_broadaddr != NULL) 1168 memcpy(&n->bcast, &((struct sockaddr_in6 *) 1169 ifa->ifa_broadaddr)->sin6_addr.s6_addr, 1170 sizeof(struct in6_addr)); 1171 if (ifa->ifa_dstaddr != NULL) 1172 memcpy(&n->peer, &((struct sockaddr_in6 *) 1173 ifa->ifa_dstaddr)->sin6_addr.s6_addr, 1174 sizeof(struct in6_addr)); 1175 n->ifindex = ((struct sockaddr_in6 *) 1176 ifa->ifa_addr)->sin6_scope_id; 1177 } 1178 if ((n->ifname = strdup(ifa->ifa_name)) == NULL) 1179 err(1, "ifa_load: strdup"); 1180 n->next = NULL; 1181 n->tail = n; 1182 if (h == NULL) 1183 h = n; 1184 else { 1185 h->tail->next = n; 1186 h->tail = n; 1187 } 1188 } 1189 1190 iftab = h; 1191 freeifaddrs(ifap); 1192} 1193 1194struct node_host * 1195ifa_exists(const char *ifa_name) 1196{ 1197 struct node_host *n; 1198 struct ifgroupreq ifgr; 1199 int s; 1200 1201 if (iftab == NULL) 1202 ifa_load(); 1203 1204 /* check wether this is a group */ 1205 if ((s = socket(AF_INET, SOCK_DGRAM, 0)) == -1) 1206 err(1, "socket"); 1207 bzero(&ifgr, sizeof(ifgr)); 1208 strlcpy(ifgr.ifgr_name, ifa_name, sizeof(ifgr.ifgr_name)); 1209 if (ioctl(s, SIOCGIFGMEMB, (caddr_t)&ifgr) == 0) { 1210 /* fake a node_host */ 1211 if ((n = calloc(1, sizeof(*n))) == NULL) 1212 err(1, "calloc"); 1213 if ((n->ifname = strdup(ifa_name)) == NULL) 1214 err(1, "strdup"); 1215 close(s); 1216 return (n); 1217 } 1218 close(s); 1219 1220 for (n = iftab; n; n = n->next) { 1221 if (n->af == AF_LINK && !strncmp(n->ifname, ifa_name, IFNAMSIZ)) 1222 return (n); 1223 } 1224 1225 return (NULL); 1226} 1227 1228struct node_host * 1229ifa_grouplookup(const char *ifa_name, int flags) 1230{ 1231 struct ifg_req *ifg; 1232 struct ifgroupreq ifgr; 1233 int s, len; 1234 struct node_host *n, *h = NULL; 1235 1236 if ((s = socket(AF_INET, SOCK_DGRAM, 0)) == -1) 1237 err(1, "socket"); 1238 bzero(&ifgr, sizeof(ifgr)); 1239 strlcpy(ifgr.ifgr_name, ifa_name, sizeof(ifgr.ifgr_name)); 1240 if (ioctl(s, SIOCGIFGMEMB, (caddr_t)&ifgr) == -1) { 1241 close(s); 1242 return (NULL); 1243 } 1244 1245 len = ifgr.ifgr_len; 1246 if ((ifgr.ifgr_groups = calloc(1, len)) == NULL) 1247 err(1, "calloc"); 1248 if (ioctl(s, SIOCGIFGMEMB, (caddr_t)&ifgr) == -1) 1249 err(1, "SIOCGIFGMEMB"); 1250 1251 for (ifg = ifgr.ifgr_groups; ifg && len >= sizeof(struct ifg_req); 1252 ifg++) { 1253 len -= sizeof(struct ifg_req); 1254 if ((n = ifa_lookup(ifg->ifgrq_member, flags)) == NULL) 1255 continue; 1256 if (h == NULL) 1257 h = n; 1258 else { 1259 h->tail->next = n; 1260 h->tail = n->tail; 1261 } 1262 } 1263 free(ifgr.ifgr_groups); 1264 close(s); 1265 1266 return (h); 1267} 1268 1269struct node_host * 1270ifa_lookup(const char *ifa_name, int flags) 1271{ 1272 struct node_host *p = NULL, *h = NULL, *n = NULL; 1273 int got4 = 0, got6 = 0; 1274 const char *last_if = NULL; 1275 1276 if ((h = ifa_grouplookup(ifa_name, flags)) != NULL) 1277 return (h); 1278 1279 if (!strncmp(ifa_name, "self", IFNAMSIZ)) 1280 ifa_name = NULL; 1281 1282 if (iftab == NULL) 1283 ifa_load(); 1284 1285 for (p = iftab; p; p = p->next) { 1286 if (ifa_skip_if(ifa_name, p)) 1287 continue; 1288 if ((flags & PFI_AFLAG_BROADCAST) && p->af != AF_INET) 1289 continue; 1290 if ((flags & PFI_AFLAG_BROADCAST) && 1291 !(p->ifa_flags & IFF_BROADCAST)) 1292 continue; 1293 if ((flags & PFI_AFLAG_PEER) && 1294 !(p->ifa_flags & IFF_POINTOPOINT)) 1295 continue; 1296 if ((flags & PFI_AFLAG_NETWORK) && p->ifindex > 0) 1297 continue; 1298 if (last_if == NULL || strcmp(last_if, p->ifname)) 1299 got4 = got6 = 0; 1300 last_if = p->ifname; 1301 if ((flags & PFI_AFLAG_NOALIAS) && p->af == AF_INET && got4) 1302 continue; 1303 if ((flags & PFI_AFLAG_NOALIAS) && p->af == AF_INET6 && got6) 1304 continue; 1305 if (p->af == AF_INET) 1306 got4 = 1; 1307 else 1308 got6 = 1; 1309 n = calloc(1, sizeof(struct node_host)); 1310 if (n == NULL) 1311 err(1, "address: calloc"); 1312 n->af = p->af; 1313 if (flags & PFI_AFLAG_BROADCAST) 1314 memcpy(&n->addr.v.a.addr, &p->bcast, 1315 sizeof(struct pf_addr)); 1316 else if (flags & PFI_AFLAG_PEER) 1317 memcpy(&n->addr.v.a.addr, &p->peer, 1318 sizeof(struct pf_addr)); 1319 else 1320 memcpy(&n->addr.v.a.addr, &p->addr.v.a.addr, 1321 sizeof(struct pf_addr)); 1322 if (flags & PFI_AFLAG_NETWORK) 1323 set_ipmask(n, unmask(&p->addr.v.a.mask, n->af)); 1324 else { 1325 if (n->af == AF_INET) { 1326 if (p->ifa_flags & IFF_LOOPBACK && 1327 p->ifa_flags & IFF_LINK1) 1328 memcpy(&n->addr.v.a.mask, 1329 &p->addr.v.a.mask, 1330 sizeof(struct pf_addr)); 1331 else 1332 set_ipmask(n, 32); 1333 } else 1334 set_ipmask(n, 128); 1335 } 1336 n->ifindex = p->ifindex; 1337 1338 n->next = NULL; 1339 n->tail = n; 1340 if (h == NULL) 1341 h = n; 1342 else { 1343 h->tail->next = n; 1344 h->tail = n; 1345 } 1346 } 1347 return (h); 1348} 1349 1350int 1351ifa_skip_if(const char *filter, struct node_host *p) 1352{ 1353 int n; 1354 1355 if (p->af != AF_INET && p->af != AF_INET6) 1356 return (1); 1357 if (filter == NULL || !*filter) 1358 return (0); 1359 if (!strcmp(p->ifname, filter)) 1360 return (0); /* exact match */ 1361 n = strlen(filter); 1362 if (n < 1 || n >= IFNAMSIZ) 1363 return (1); /* sanity check */ 1364 if (filter[n-1] >= '0' && filter[n-1] <= '9') 1365 return (1); /* only do exact match in that case */ 1366 if (strncmp(p->ifname, filter, n)) 1367 return (1); /* prefix doesn't match */ 1368 return (p->ifname[n] < '0' || p->ifname[n] > '9'); 1369} 1370 1371 1372struct node_host * 1373host(const char *s) 1374{ 1375 struct node_host *h = NULL; 1376 int mask, v4mask, v6mask, cont = 1; 1377 char *p, *q, *ps; 1378 1379 if ((p = strrchr(s, '/')) != NULL) { 1380 mask = strtol(p+1, &q, 0); 1381 if (!q || *q || mask > 128 || q == (p+1)) { 1382 fprintf(stderr, "invalid netmask '%s'\n", p); 1383 return (NULL); 1384 } 1385 if ((ps = malloc(strlen(s) - strlen(p) + 1)) == NULL) 1386 err(1, "host: malloc"); 1387 strlcpy(ps, s, strlen(s) - strlen(p) + 1); 1388 v4mask = v6mask = mask; 1389 } else { 1390 if ((ps = strdup(s)) == NULL) 1391 err(1, "host: strdup"); 1392 v4mask = 32; 1393 v6mask = 128; 1394 mask = -1; 1395 } 1396 1397 /* interface with this name exists? */ 1398 if (cont && (h = host_if(ps, mask)) != NULL) 1399 cont = 0; 1400 1401 /* IPv4 address? */ 1402 if (cont && (h = host_v4(s, mask)) != NULL) 1403 cont = 0; 1404 1405 /* IPv6 address? */ 1406 if (cont && (h = host_v6(ps, v6mask)) != NULL) 1407 cont = 0; 1408 1409 /* dns lookup */ 1410 if (cont && (h = host_dns(ps, v4mask, v6mask)) != NULL) 1411 cont = 0; 1412 free(ps); 1413 1414 if (h == NULL || cont == 1) { 1415 fprintf(stderr, "no IP address found for %s\n", s); 1416 return (NULL); 1417 } 1418 return (h); 1419} 1420 1421struct node_host * 1422host_if(const char *s, int mask) 1423{ 1424 struct node_host *n, *h = NULL; 1425 char *p, *ps; 1426 int flags = 0; 1427 1428 if ((ps = strdup(s)) == NULL) 1429 err(1, "host_if: strdup"); 1430 while ((p = strrchr(ps, ':')) != NULL) { 1431 if (!strcmp(p+1, "network")) 1432 flags |= PFI_AFLAG_NETWORK; 1433 else if (!strcmp(p+1, "broadcast")) 1434 flags |= PFI_AFLAG_BROADCAST; 1435 else if (!strcmp(p+1, "peer")) 1436 flags |= PFI_AFLAG_PEER; 1437 else if (!strcmp(p+1, "0")) 1438 flags |= PFI_AFLAG_NOALIAS; 1439 else { 1440 free(ps); 1441 return (NULL); 1442 } 1443 *p = '\0'; 1444 } 1445 if (flags & (flags - 1) & PFI_AFLAG_MODEMASK) { /* Yep! */ 1446 fprintf(stderr, "illegal combination of interface modifiers\n"); 1447 free(ps); 1448 return (NULL); 1449 } 1450 if ((flags & (PFI_AFLAG_NETWORK|PFI_AFLAG_BROADCAST)) && mask > -1) { 1451 fprintf(stderr, "network or broadcast lookup, but " 1452 "extra netmask given\n"); 1453 free(ps); 1454 return (NULL); 1455 } 1456 if (ifa_exists(ps) || !strncmp(ps, "self", IFNAMSIZ)) { 1457 /* interface with this name exists */ 1458 h = ifa_lookup(ps, flags); 1459 for (n = h; n != NULL && mask > -1; n = n->next) 1460 set_ipmask(n, mask); 1461 } 1462 1463 free(ps); 1464 return (h); 1465} 1466 1467struct node_host * 1468host_v4(const char *s, int mask) 1469{ 1470 struct node_host *h = NULL; 1471 struct in_addr ina; 1472 int bits = 32; 1473 1474 memset(&ina, 0, sizeof(struct in_addr)); 1475 if (strrchr(s, '/') != NULL) { 1476 if ((bits = inet_net_pton(AF_INET, s, &ina, sizeof(ina))) == -1) 1477 return (NULL); 1478 } else { 1479 if (inet_pton(AF_INET, s, &ina) != 1) 1480 return (NULL); 1481 } 1482 1483 h = calloc(1, sizeof(struct node_host)); 1484 if (h == NULL) 1485 err(1, "address: calloc"); 1486 h->ifname = NULL; 1487 h->af = AF_INET; 1488 h->addr.v.a.addr.addr32[0] = ina.s_addr; 1489 set_ipmask(h, bits); 1490 h->next = NULL; 1491 h->tail = h; 1492 1493 return (h); 1494} 1495 1496struct node_host * 1497host_v6(const char *s, int mask) 1498{ 1499 struct addrinfo hints, *res; 1500 struct node_host *h = NULL; 1501 1502 memset(&hints, 0, sizeof(hints)); 1503 hints.ai_family = AF_INET6; 1504 hints.ai_socktype = SOCK_DGRAM; /*dummy*/ 1505 hints.ai_flags = AI_NUMERICHOST; 1506 if (getaddrinfo(s, "0", &hints, &res) == 0) { 1507 h = calloc(1, sizeof(struct node_host)); 1508 if (h == NULL) 1509 err(1, "address: calloc"); 1510 h->ifname = NULL; 1511 h->af = AF_INET6; 1512 memcpy(&h->addr.v.a.addr, 1513 &((struct sockaddr_in6 *)res->ai_addr)->sin6_addr, 1514 sizeof(h->addr.v.a.addr)); 1515 h->ifindex = 1516 ((struct sockaddr_in6 *)res->ai_addr)->sin6_scope_id; 1517 set_ipmask(h, mask); 1518 freeaddrinfo(res); 1519 h->next = NULL; 1520 h->tail = h; 1521 } 1522 1523 return (h); 1524} 1525 1526struct node_host * 1527host_dns(const char *s, int v4mask, int v6mask) 1528{ 1529 struct addrinfo hints, *res0, *res; 1530 struct node_host *n, *h = NULL; 1531 int error, noalias = 0; 1532 int got4 = 0, got6 = 0; 1533 char *p, *ps; 1534 1535 if ((ps = strdup(s)) == NULL) 1536 err(1, "host_dns: strdup"); 1537 if ((p = strrchr(ps, ':')) != NULL && !strcmp(p, ":0")) { 1538 noalias = 1; 1539 *p = '\0'; 1540 } 1541 memset(&hints, 0, sizeof(hints)); 1542 hints.ai_family = PF_UNSPEC; 1543 hints.ai_socktype = SOCK_STREAM; /* DUMMY */ 1544 error = getaddrinfo(ps, NULL, &hints, &res0); 1545 if (error) { 1546 free(ps); 1547 return (h); 1548 } 1549 1550 for (res = res0; res; res = res->ai_next) { 1551 if (res->ai_family != AF_INET && 1552 res->ai_family != AF_INET6) 1553 continue; 1554 if (noalias) { 1555 if (res->ai_family == AF_INET) { 1556 if (got4) 1557 continue; 1558 got4 = 1; 1559 } else { 1560 if (got6) 1561 continue; 1562 got6 = 1; 1563 } 1564 } 1565 n = calloc(1, sizeof(struct node_host)); 1566 if (n == NULL) 1567 err(1, "host_dns: calloc"); 1568 n->ifname = NULL; 1569 n->af = res->ai_family; 1570 if (res->ai_family == AF_INET) { 1571 memcpy(&n->addr.v.a.addr, 1572 &((struct sockaddr_in *) 1573 res->ai_addr)->sin_addr.s_addr, 1574 sizeof(struct in_addr)); 1575 set_ipmask(n, v4mask); 1576 } else { 1577 memcpy(&n->addr.v.a.addr, 1578 &((struct sockaddr_in6 *) 1579 res->ai_addr)->sin6_addr.s6_addr, 1580 sizeof(struct in6_addr)); 1581 n->ifindex = 1582 ((struct sockaddr_in6 *) 1583 res->ai_addr)->sin6_scope_id; 1584 set_ipmask(n, v6mask); 1585 } 1586 n->next = NULL; 1587 n->tail = n; 1588 if (h == NULL) 1589 h = n; 1590 else { 1591 h->tail->next = n; 1592 h->tail = n; 1593 } 1594 } 1595 freeaddrinfo(res0); 1596 free(ps); 1597 1598 return (h); 1599} 1600 1601/* 1602 * convert a hostname to a list of addresses and put them in the given buffer. 1603 * test: 1604 * if set to 1, only simple addresses are accepted (no netblock, no "!"). 1605 */ 1606int 1607append_addr(struct pfr_buffer *b, char *s, int test) 1608{ 1609 char *r; 1610 struct node_host *h, *n; 1611 int rv, not = 0; 1612 1613 for (r = s; *r == '!'; r++) 1614 not = !not; 1615 if ((n = host(r)) == NULL) { 1616 errno = 0; 1617 return (-1); 1618 } 1619 rv = append_addr_host(b, n, test, not); 1620 do { 1621 h = n; 1622 n = n->next; 1623 free(h); 1624 } while (n != NULL); 1625 return (rv); 1626} 1627 1628/* 1629 * same as previous function, but with a pre-parsed input and the ability 1630 * to "negate" the result. Does not free the node_host list. 1631 * not: 1632 * setting it to 1 is equivalent to adding "!" in front of parameter s. 1633 */ 1634int 1635append_addr_host(struct pfr_buffer *b, struct node_host *n, int test, int not) 1636{ 1637 int bits; 1638 struct pfr_addr addr; 1639 1640 do { 1641 bzero(&addr, sizeof(addr)); 1642 addr.pfra_not = n->not ^ not; 1643 addr.pfra_af = n->af; 1644 addr.pfra_net = unmask(&n->addr.v.a.mask, n->af); 1645 switch (n->af) { 1646 case AF_INET: 1647 addr.pfra_ip4addr.s_addr = n->addr.v.a.addr.addr32[0]; 1648 bits = 32; 1649 break; 1650 case AF_INET6: 1651 memcpy(&addr.pfra_ip6addr, &n->addr.v.a.addr.v6, 1652 sizeof(struct in6_addr)); 1653 bits = 128; 1654 break; 1655 default: 1656 errno = EINVAL; 1657 return (-1); 1658 } 1659 if ((test && (not || addr.pfra_net != bits)) || 1660 addr.pfra_net > bits) { 1661 errno = EINVAL; 1662 return (-1); 1663 } 1664 if (pfr_buf_add(b, &addr)) 1665 return (-1); 1666 } while ((n = n->next) != NULL); 1667 1668 return (0); 1669} 1670 1671int 1672pfctl_add_trans(struct pfr_buffer *buf, int rs_num, const char *anchor) 1673{ 1674 struct pfioc_trans_e trans; 1675 1676 bzero(&trans, sizeof(trans)); 1677 trans.rs_num = rs_num; 1678 if (strlcpy(trans.anchor, anchor, 1679 sizeof(trans.anchor)) >= sizeof(trans.anchor)) 1680 errx(1, "pfctl_add_trans: strlcpy"); 1681 1682 return pfr_buf_add(buf, &trans); 1683} 1684 1685u_int32_t 1686pfctl_get_ticket(struct pfr_buffer *buf, int rs_num, const char *anchor) 1687{ 1688 struct pfioc_trans_e *p; 1689 1690 PFRB_FOREACH(p, buf) 1691 if (rs_num == p->rs_num && !strcmp(anchor, p->anchor)) 1692 return (p->ticket); 1693 errx(1, "pfctl_get_ticket: assertion failed"); 1694} 1695 1696int 1697pfctl_trans(int dev, struct pfr_buffer *buf, u_long cmd, int from) 1698{ 1699 struct pfioc_trans trans; 1700 1701 bzero(&trans, sizeof(trans)); 1702 trans.size = buf->pfrb_size - from; 1703 trans.esize = sizeof(struct pfioc_trans_e); 1704 trans.array = ((struct pfioc_trans_e *)buf->pfrb_caddr) + from; 1705 return ioctl(dev, cmd, &trans); 1706} 1707