ipfw2.c revision 187769
1255767Sdes/* 276259Sgreen * Copyright (c) 2002-2003 Luigi Rizzo 365668Skris * Copyright (c) 1996 Alex Nash, Paul Traina, Poul-Henning Kamp 465668Skris * Copyright (c) 1994 Ugen J.S.Antsilevich 565668Skris * 665668Skris * Idea and grammar partially left from: 765668Skris * Copyright (c) 1993 Daniel Boulet 865668Skris * 965668Skris * Redistribution and use in source forms, with and without modification, 1065668Skris * are permitted provided that this entire comment appears intact. 1165668Skris * 1265668Skris * Redistribution in binary form may occur without any restrictions. 1365668Skris * Obviously, it would be nice if you gave credit where credit is due 1458582Skris * but requiring it would be too onerous. 1558582Skris * 1658582Skris * This software is provided ``AS IS'' without any warranties of any kind. 1758582Skris * 18204917Sdes * NEW command line interface for IP firewall facility 1958582Skris * 2076259Sgreen * $FreeBSD: head/sbin/ipfw/ipfw2.c 187769 2009-01-27 11:06:59Z luigi $ 21221420Sdes */ 22221420Sdes 23221420Sdes#include <sys/types.h> 24221420Sdes#include <sys/socket.h> 25221420Sdes#include <sys/sockio.h> 26221420Sdes#include <sys/sysctl.h> 27221420Sdes 28221420Sdes#include "ipfw2.h" 29221420Sdes 30221420Sdes#include <ctype.h> 31221420Sdes#include <err.h> 32221420Sdes#include <errno.h> 33221420Sdes#include <grp.h> 34221420Sdes#include <netdb.h> 35221420Sdes#include <pwd.h> 36221420Sdes#include <stdio.h> 37221420Sdes#include <stdlib.h> 38221420Sdes#include <string.h> 39221420Sdes#include <sysexits.h> 40221420Sdes#include <timeconv.h> /* _long_to_time */ 41221420Sdes#include <unistd.h> 42221420Sdes#include <fcntl.h> 43255767Sdes 44221420Sdes#define IPFW_INTERNAL /* Access to protected structures in ip_fw.h. */ 4558582Skris 46146998Sdes#include <net/ethernet.h> 47146998Sdes#include <net/if.h> 48146998Sdes#include <net/if_dl.h> 49204917Sdes#include <net/pfvar.h> 50204917Sdes#include <net/route.h> /* def. of struct route */ 51204917Sdes#include <netinet/in.h> 52146998Sdes#include <netinet/in_systm.h> 53146998Sdes#include <netinet/ip.h> 5458582Skris#include <netinet/ip_icmp.h> 55#include <netinet/icmp6.h> 56#include <netinet/ip_fw.h> 57#include <netinet/tcp.h> 58#include <arpa/inet.h> 59#include <alias.h> 60 61struct cmdline_opts co; /* global options */ 62 63int resvd_set_number = RESVD_SET; 64 65#define GET_UINT_ARG(arg, min, max, tok, s_x) do { \ 66 if (!ac) \ 67 errx(EX_USAGE, "%s: missing argument", match_value(s_x, tok)); \ 68 if (_substrcmp(*av, "tablearg") == 0) { \ 69 arg = IP_FW_TABLEARG; \ 70 break; \ 71 } \ 72 \ 73 { \ 74 long val; \ 75 char *end; \ 76 \ 77 val = strtol(*av, &end, 10); \ 78 \ 79 if (!isdigit(**av) || *end != '\0' || (val == 0 && errno == EINVAL)) \ 80 errx(EX_DATAERR, "%s: invalid argument: %s", \ 81 match_value(s_x, tok), *av); \ 82 \ 83 if (errno == ERANGE || val < min || val > max) \ 84 errx(EX_DATAERR, "%s: argument is out of range (%u..%u): %s", \ 85 match_value(s_x, tok), min, max, *av); \ 86 \ 87 if (val == IP_FW_TABLEARG) \ 88 errx(EX_DATAERR, "%s: illegal argument value: %s", \ 89 match_value(s_x, tok), *av); \ 90 arg = val; \ 91 } \ 92} while (0) 93 94static void 95PRINT_UINT_ARG(const char *str, uint32_t arg) 96{ 97 if (str != NULL) 98 printf("%s",str); 99 if (arg == IP_FW_TABLEARG) 100 printf("tablearg"); 101 else 102 printf("%u", arg); 103} 104 105static struct _s_x f_tcpflags[] = { 106 { "syn", TH_SYN }, 107 { "fin", TH_FIN }, 108 { "ack", TH_ACK }, 109 { "psh", TH_PUSH }, 110 { "rst", TH_RST }, 111 { "urg", TH_URG }, 112 { "tcp flag", 0 }, 113 { NULL, 0 } 114}; 115 116static struct _s_x f_tcpopts[] = { 117 { "mss", IP_FW_TCPOPT_MSS }, 118 { "maxseg", IP_FW_TCPOPT_MSS }, 119 { "window", IP_FW_TCPOPT_WINDOW }, 120 { "sack", IP_FW_TCPOPT_SACK }, 121 { "ts", IP_FW_TCPOPT_TS }, 122 { "timestamp", IP_FW_TCPOPT_TS }, 123 { "cc", IP_FW_TCPOPT_CC }, 124 { "tcp option", 0 }, 125 { NULL, 0 } 126}; 127 128/* 129 * IP options span the range 0 to 255 so we need to remap them 130 * (though in fact only the low 5 bits are significant). 131 */ 132static struct _s_x f_ipopts[] = { 133 { "ssrr", IP_FW_IPOPT_SSRR}, 134 { "lsrr", IP_FW_IPOPT_LSRR}, 135 { "rr", IP_FW_IPOPT_RR}, 136 { "ts", IP_FW_IPOPT_TS}, 137 { "ip option", 0 }, 138 { NULL, 0 } 139}; 140 141static struct _s_x f_iptos[] = { 142 { "lowdelay", IPTOS_LOWDELAY}, 143 { "throughput", IPTOS_THROUGHPUT}, 144 { "reliability", IPTOS_RELIABILITY}, 145 { "mincost", IPTOS_MINCOST}, 146 { "congestion", IPTOS_ECN_CE}, 147 { "ecntransport", IPTOS_ECN_ECT0}, 148 { "ip tos option", 0}, 149 { NULL, 0 } 150}; 151 152static struct _s_x limit_masks[] = { 153 {"all", DYN_SRC_ADDR|DYN_SRC_PORT|DYN_DST_ADDR|DYN_DST_PORT}, 154 {"src-addr", DYN_SRC_ADDR}, 155 {"src-port", DYN_SRC_PORT}, 156 {"dst-addr", DYN_DST_ADDR}, 157 {"dst-port", DYN_DST_PORT}, 158 {NULL, 0} 159}; 160 161/* 162 * we use IPPROTO_ETHERTYPE as a fake protocol id to call the print routines 163 * This is only used in this code. 164 */ 165#define IPPROTO_ETHERTYPE 0x1000 166static struct _s_x ether_types[] = { 167 /* 168 * Note, we cannot use "-:&/" in the names because they are field 169 * separators in the type specifications. Also, we use s = NULL as 170 * end-delimiter, because a type of 0 can be legal. 171 */ 172 { "ip", 0x0800 }, 173 { "ipv4", 0x0800 }, 174 { "ipv6", 0x86dd }, 175 { "arp", 0x0806 }, 176 { "rarp", 0x8035 }, 177 { "vlan", 0x8100 }, 178 { "loop", 0x9000 }, 179 { "trail", 0x1000 }, 180 { "at", 0x809b }, 181 { "atalk", 0x809b }, 182 { "aarp", 0x80f3 }, 183 { "pppoe_disc", 0x8863 }, 184 { "pppoe_sess", 0x8864 }, 185 { "ipx_8022", 0x00E0 }, 186 { "ipx_8023", 0x0000 }, 187 { "ipx_ii", 0x8137 }, 188 { "ipx_snap", 0x8137 }, 189 { "ipx", 0x8137 }, 190 { "ns", 0x0600 }, 191 { NULL, 0 } 192}; 193 194 195static struct _s_x nat_params[] = { 196 { "ip", TOK_IP }, 197 { "if", TOK_IF }, 198 { "log", TOK_ALOG }, 199 { "deny_in", TOK_DENY_INC }, 200 { "same_ports", TOK_SAME_PORTS }, 201 { "unreg_only", TOK_UNREG_ONLY }, 202 { "reset", TOK_RESET_ADDR }, 203 { "reverse", TOK_ALIAS_REV }, 204 { "proxy_only", TOK_PROXY_ONLY }, 205 { "redirect_addr", TOK_REDIR_ADDR }, 206 { "redirect_port", TOK_REDIR_PORT }, 207 { "redirect_proto", TOK_REDIR_PROTO }, 208 { NULL, 0 } /* terminator */ 209}; 210 211static struct _s_x rule_actions[] = { 212 { "accept", TOK_ACCEPT }, 213 { "pass", TOK_ACCEPT }, 214 { "allow", TOK_ACCEPT }, 215 { "permit", TOK_ACCEPT }, 216 { "count", TOK_COUNT }, 217 { "pipe", TOK_PIPE }, 218 { "queue", TOK_QUEUE }, 219 { "divert", TOK_DIVERT }, 220 { "tee", TOK_TEE }, 221 { "netgraph", TOK_NETGRAPH }, 222 { "ngtee", TOK_NGTEE }, 223 { "fwd", TOK_FORWARD }, 224 { "forward", TOK_FORWARD }, 225 { "skipto", TOK_SKIPTO }, 226 { "deny", TOK_DENY }, 227 { "drop", TOK_DENY }, 228 { "reject", TOK_REJECT }, 229 { "reset6", TOK_RESET6 }, 230 { "reset", TOK_RESET }, 231 { "unreach6", TOK_UNREACH6 }, 232 { "unreach", TOK_UNREACH }, 233 { "check-state", TOK_CHECKSTATE }, 234 { "//", TOK_COMMENT }, 235 { "nat", TOK_NAT }, 236 { "setfib", TOK_SETFIB }, 237 { NULL, 0 } /* terminator */ 238}; 239 240static struct _s_x rule_action_params[] = { 241 { "altq", TOK_ALTQ }, 242 { "log", TOK_LOG }, 243 { "tag", TOK_TAG }, 244 { "untag", TOK_UNTAG }, 245 { NULL, 0 } /* terminator */ 246}; 247 248static struct _s_x rule_options[] = { 249 { "tagged", TOK_TAGGED }, 250 { "uid", TOK_UID }, 251 { "gid", TOK_GID }, 252 { "jail", TOK_JAIL }, 253 { "in", TOK_IN }, 254 { "limit", TOK_LIMIT }, 255 { "keep-state", TOK_KEEPSTATE }, 256 { "bridged", TOK_LAYER2 }, 257 { "layer2", TOK_LAYER2 }, 258 { "out", TOK_OUT }, 259 { "diverted", TOK_DIVERTED }, 260 { "diverted-loopback", TOK_DIVERTEDLOOPBACK }, 261 { "diverted-output", TOK_DIVERTEDOUTPUT }, 262 { "xmit", TOK_XMIT }, 263 { "recv", TOK_RECV }, 264 { "via", TOK_VIA }, 265 { "fragment", TOK_FRAG }, 266 { "frag", TOK_FRAG }, 267 { "fib", TOK_FIB }, 268 { "ipoptions", TOK_IPOPTS }, 269 { "ipopts", TOK_IPOPTS }, 270 { "iplen", TOK_IPLEN }, 271 { "ipid", TOK_IPID }, 272 { "ipprecedence", TOK_IPPRECEDENCE }, 273 { "iptos", TOK_IPTOS }, 274 { "ipttl", TOK_IPTTL }, 275 { "ipversion", TOK_IPVER }, 276 { "ipver", TOK_IPVER }, 277 { "estab", TOK_ESTAB }, 278 { "established", TOK_ESTAB }, 279 { "setup", TOK_SETUP }, 280 { "tcpdatalen", TOK_TCPDATALEN }, 281 { "tcpflags", TOK_TCPFLAGS }, 282 { "tcpflgs", TOK_TCPFLAGS }, 283 { "tcpoptions", TOK_TCPOPTS }, 284 { "tcpopts", TOK_TCPOPTS }, 285 { "tcpseq", TOK_TCPSEQ }, 286 { "tcpack", TOK_TCPACK }, 287 { "tcpwin", TOK_TCPWIN }, 288 { "icmptype", TOK_ICMPTYPES }, 289 { "icmptypes", TOK_ICMPTYPES }, 290 { "dst-ip", TOK_DSTIP }, 291 { "src-ip", TOK_SRCIP }, 292 { "dst-port", TOK_DSTPORT }, 293 { "src-port", TOK_SRCPORT }, 294 { "proto", TOK_PROTO }, 295 { "MAC", TOK_MAC }, 296 { "mac", TOK_MAC }, 297 { "mac-type", TOK_MACTYPE }, 298 { "verrevpath", TOK_VERREVPATH }, 299 { "versrcreach", TOK_VERSRCREACH }, 300 { "antispoof", TOK_ANTISPOOF }, 301 { "ipsec", TOK_IPSEC }, 302 { "icmp6type", TOK_ICMP6TYPES }, 303 { "icmp6types", TOK_ICMP6TYPES }, 304 { "ext6hdr", TOK_EXT6HDR}, 305 { "flow-id", TOK_FLOWID}, 306 { "ipv6", TOK_IPV6}, 307 { "ip6", TOK_IPV6}, 308 { "ipv4", TOK_IPV4}, 309 { "ip4", TOK_IPV4}, 310 { "dst-ipv6", TOK_DSTIP6}, 311 { "dst-ip6", TOK_DSTIP6}, 312 { "src-ipv6", TOK_SRCIP6}, 313 { "src-ip6", TOK_SRCIP6}, 314 { "//", TOK_COMMENT }, 315 316 { "not", TOK_NOT }, /* pseudo option */ 317 { "!", /* escape ? */ TOK_NOT }, /* pseudo option */ 318 { "or", TOK_OR }, /* pseudo option */ 319 { "|", /* escape */ TOK_OR }, /* pseudo option */ 320 { "{", TOK_STARTBRACE }, /* pseudo option */ 321 { "(", TOK_STARTBRACE }, /* pseudo option */ 322 { "}", TOK_ENDBRACE }, /* pseudo option */ 323 { ")", TOK_ENDBRACE }, /* pseudo option */ 324 { NULL, 0 } /* terminator */ 325}; 326 327static __inline uint64_t 328align_uint64(uint64_t *pll) { 329 uint64_t ret; 330 331 bcopy (pll, &ret, sizeof(ret)); 332 return ret; 333} 334 335void * 336safe_calloc(size_t number, size_t size) 337{ 338 void *ret = calloc(number, size); 339 340 if (ret == NULL) 341 err(EX_OSERR, "calloc"); 342 return ret; 343} 344 345void * 346safe_realloc(void *ptr, size_t size) 347{ 348 void *ret = realloc(ptr, size); 349 350 if (ret == NULL) 351 err(EX_OSERR, "realloc"); 352 return ret; 353} 354 355/* 356 * conditionally runs the command. 357 */ 358int 359do_cmd(int optname, void *optval, uintptr_t optlen) 360{ 361 static int s = -1; /* the socket */ 362 int i; 363 364 if (co.test_only) 365 return 0; 366 367 if (s == -1) 368 s = socket(AF_INET, SOCK_RAW, IPPROTO_RAW); 369 if (s < 0) 370 err(EX_UNAVAILABLE, "socket"); 371 372 if (optname == IP_FW_GET || optname == IP_DUMMYNET_GET || 373 optname == IP_FW_ADD || optname == IP_FW_TABLE_LIST || 374 optname == IP_FW_TABLE_GETSIZE || 375 optname == IP_FW_NAT_GET_CONFIG || 376 optname == IP_FW_NAT_GET_LOG) 377 i = getsockopt(s, IPPROTO_IP, optname, optval, 378 (socklen_t *)optlen); 379 else 380 i = setsockopt(s, IPPROTO_IP, optname, optval, optlen); 381 return i; 382} 383 384/** 385 * match_token takes a table and a string, returns the value associated 386 * with the string (-1 in case of failure). 387 */ 388int 389match_token(struct _s_x *table, char *string) 390{ 391 struct _s_x *pt; 392 uint i = strlen(string); 393 394 for (pt = table ; i && pt->s != NULL ; pt++) 395 if (strlen(pt->s) == i && !bcmp(string, pt->s, i)) 396 return pt->x; 397 return -1; 398} 399 400/** 401 * match_value takes a table and a value, returns the string associated 402 * with the value (NULL in case of failure). 403 */ 404static char const * 405match_value(struct _s_x *p, int value) 406{ 407 for (; p->s != NULL; p++) 408 if (p->x == value) 409 return p->s; 410 return NULL; 411} 412 413/* 414 * _substrcmp takes two strings and returns 1 if they do not match, 415 * and 0 if they match exactly or the first string is a sub-string 416 * of the second. A warning is printed to stderr in the case that the 417 * first string is a sub-string of the second. 418 * 419 * This function will be removed in the future through the usual 420 * deprecation process. 421 */ 422int 423_substrcmp(const char *str1, const char* str2) 424{ 425 426 if (strncmp(str1, str2, strlen(str1)) != 0) 427 return 1; 428 429 if (strlen(str1) != strlen(str2)) 430 warnx("DEPRECATED: '%s' matched '%s' as a sub-string", 431 str1, str2); 432 return 0; 433} 434 435/* 436 * _substrcmp2 takes three strings and returns 1 if the first two do not match, 437 * and 0 if they match exactly or the second string is a sub-string 438 * of the first. A warning is printed to stderr in the case that the 439 * first string does not match the third. 440 * 441 * This function exists to warn about the bizzare construction 442 * strncmp(str, "by", 2) which is used to allow people to use a shotcut 443 * for "bytes". The problem is that in addition to accepting "by", 444 * "byt", "byte", and "bytes", it also excepts "by_rabid_dogs" and any 445 * other string beginning with "by". 446 * 447 * This function will be removed in the future through the usual 448 * deprecation process. 449 */ 450int 451_substrcmp2(const char *str1, const char* str2, const char* str3) 452{ 453 454 if (strncmp(str1, str2, strlen(str2)) != 0) 455 return 1; 456 457 if (strcmp(str1, str3) != 0) 458 warnx("DEPRECATED: '%s' matched '%s'", 459 str1, str3); 460 return 0; 461} 462 463/* 464 * prints one port, symbolic or numeric 465 */ 466static void 467print_port(int proto, uint16_t port) 468{ 469 470 if (proto == IPPROTO_ETHERTYPE) { 471 char const *s; 472 473 if (co.do_resolv && (s = match_value(ether_types, port)) ) 474 printf("%s", s); 475 else 476 printf("0x%04x", port); 477 } else { 478 struct servent *se = NULL; 479 if (co.do_resolv) { 480 struct protoent *pe = getprotobynumber(proto); 481 482 se = getservbyport(htons(port), pe ? pe->p_name : NULL); 483 } 484 if (se) 485 printf("%s", se->s_name); 486 else 487 printf("%d", port); 488 } 489} 490 491static struct _s_x _port_name[] = { 492 {"dst-port", O_IP_DSTPORT}, 493 {"src-port", O_IP_SRCPORT}, 494 {"ipid", O_IPID}, 495 {"iplen", O_IPLEN}, 496 {"ipttl", O_IPTTL}, 497 {"mac-type", O_MAC_TYPE}, 498 {"tcpdatalen", O_TCPDATALEN}, 499 {"tagged", O_TAGGED}, 500 {NULL, 0} 501}; 502 503/* 504 * Print the values in a list 16-bit items of the types above. 505 * XXX todo: add support for mask. 506 */ 507static void 508print_newports(ipfw_insn_u16 *cmd, int proto, int opcode) 509{ 510 uint16_t *p = cmd->ports; 511 int i; 512 char const *sep; 513 514 if (opcode != 0) { 515 sep = match_value(_port_name, opcode); 516 if (sep == NULL) 517 sep = "???"; 518 printf (" %s", sep); 519 } 520 sep = " "; 521 for (i = F_LEN((ipfw_insn *)cmd) - 1; i > 0; i--, p += 2) { 522 printf(sep); 523 print_port(proto, p[0]); 524 if (p[0] != p[1]) { 525 printf("-"); 526 print_port(proto, p[1]); 527 } 528 sep = ","; 529 } 530} 531 532/* 533 * Like strtol, but also translates service names into port numbers 534 * for some protocols. 535 * In particular: 536 * proto == -1 disables the protocol check; 537 * proto == IPPROTO_ETHERTYPE looks up an internal table 538 * proto == <some value in /etc/protocols> matches the values there. 539 * Returns *end == s in case the parameter is not found. 540 */ 541static int 542strtoport(char *s, char **end, int base, int proto) 543{ 544 char *p, *buf; 545 char *s1; 546 int i; 547 548 *end = s; /* default - not found */ 549 if (*s == '\0') 550 return 0; /* not found */ 551 552 if (isdigit(*s)) 553 return strtol(s, end, base); 554 555 /* 556 * find separator. '\\' escapes the next char. 557 */ 558 for (s1 = s; *s1 && (isalnum(*s1) || *s1 == '\\') ; s1++) 559 if (*s1 == '\\' && s1[1] != '\0') 560 s1++; 561 562 buf = safe_calloc(s1 - s + 1, 1); 563 564 /* 565 * copy into a buffer skipping backslashes 566 */ 567 for (p = s, i = 0; p != s1 ; p++) 568 if (*p != '\\') 569 buf[i++] = *p; 570 buf[i++] = '\0'; 571 572 if (proto == IPPROTO_ETHERTYPE) { 573 i = match_token(ether_types, buf); 574 free(buf); 575 if (i != -1) { /* found */ 576 *end = s1; 577 return i; 578 } 579 } else { 580 struct protoent *pe = NULL; 581 struct servent *se; 582 583 if (proto != 0) 584 pe = getprotobynumber(proto); 585 setservent(1); 586 se = getservbyname(buf, pe ? pe->p_name : NULL); 587 free(buf); 588 if (se != NULL) { 589 *end = s1; 590 return ntohs(se->s_port); 591 } 592 } 593 return 0; /* not found */ 594} 595 596/* 597 * Map between current altq queue id numbers and names. 598 */ 599static int altq_fetched = 0; 600static TAILQ_HEAD(, pf_altq) altq_entries = 601 TAILQ_HEAD_INITIALIZER(altq_entries); 602 603static void 604altq_set_enabled(int enabled) 605{ 606 int pffd; 607 608 pffd = open("/dev/pf", O_RDWR); 609 if (pffd == -1) 610 err(EX_UNAVAILABLE, 611 "altq support opening pf(4) control device"); 612 if (enabled) { 613 if (ioctl(pffd, DIOCSTARTALTQ) != 0 && errno != EEXIST) 614 err(EX_UNAVAILABLE, "enabling altq"); 615 } else { 616 if (ioctl(pffd, DIOCSTOPALTQ) != 0 && errno != ENOENT) 617 err(EX_UNAVAILABLE, "disabling altq"); 618 } 619 close(pffd); 620} 621 622static void 623altq_fetch(void) 624{ 625 struct pfioc_altq pfioc; 626 struct pf_altq *altq; 627 int pffd; 628 unsigned int mnr; 629 630 if (altq_fetched) 631 return; 632 altq_fetched = 1; 633 pffd = open("/dev/pf", O_RDONLY); 634 if (pffd == -1) { 635 warn("altq support opening pf(4) control device"); 636 return; 637 } 638 bzero(&pfioc, sizeof(pfioc)); 639 if (ioctl(pffd, DIOCGETALTQS, &pfioc) != 0) { 640 warn("altq support getting queue list"); 641 close(pffd); 642 return; 643 } 644 mnr = pfioc.nr; 645 for (pfioc.nr = 0; pfioc.nr < mnr; pfioc.nr++) { 646 if (ioctl(pffd, DIOCGETALTQ, &pfioc) != 0) { 647 if (errno == EBUSY) 648 break; 649 warn("altq support getting queue list"); 650 close(pffd); 651 return; 652 } 653 if (pfioc.altq.qid == 0) 654 continue; 655 altq = safe_calloc(1, sizeof(*altq)); 656 *altq = pfioc.altq; 657 TAILQ_INSERT_TAIL(&altq_entries, altq, entries); 658 } 659 close(pffd); 660} 661 662static u_int32_t 663altq_name_to_qid(const char *name) 664{ 665 struct pf_altq *altq; 666 667 altq_fetch(); 668 TAILQ_FOREACH(altq, &altq_entries, entries) 669 if (strcmp(name, altq->qname) == 0) 670 break; 671 if (altq == NULL) 672 errx(EX_DATAERR, "altq has no queue named `%s'", name); 673 return altq->qid; 674} 675 676static const char * 677altq_qid_to_name(u_int32_t qid) 678{ 679 struct pf_altq *altq; 680 681 altq_fetch(); 682 TAILQ_FOREACH(altq, &altq_entries, entries) 683 if (qid == altq->qid) 684 break; 685 if (altq == NULL) 686 return NULL; 687 return altq->qname; 688} 689 690static void 691fill_altq_qid(u_int32_t *qid, const char *av) 692{ 693 *qid = altq_name_to_qid(av); 694} 695 696/* 697 * Fill the body of the command with the list of port ranges. 698 */ 699static int 700fill_newports(ipfw_insn_u16 *cmd, char *av, int proto) 701{ 702 uint16_t a, b, *p = cmd->ports; 703 int i = 0; 704 char *s = av; 705 706 while (*s) { 707 a = strtoport(av, &s, 0, proto); 708 if (s == av) /* empty or invalid argument */ 709 return (0); 710 711 switch (*s) { 712 case '-': /* a range */ 713 av = s + 1; 714 b = strtoport(av, &s, 0, proto); 715 /* Reject expressions like '1-abc' or '1-2-3'. */ 716 if (s == av || (*s != ',' && *s != '\0')) 717 return (0); 718 p[0] = a; 719 p[1] = b; 720 break; 721 case ',': /* comma separated list */ 722 case '\0': 723 p[0] = p[1] = a; 724 break; 725 default: 726 warnx("port list: invalid separator <%c> in <%s>", 727 *s, av); 728 return (0); 729 } 730 731 i++; 732 p += 2; 733 av = s + 1; 734 } 735 if (i > 0) { 736 if (i + 1 > F_LEN_MASK) 737 errx(EX_DATAERR, "too many ports/ranges\n"); 738 cmd->o.len |= i + 1; /* leave F_NOT and F_OR untouched */ 739 } 740 return (i); 741} 742 743static struct _s_x icmpcodes[] = { 744 { "net", ICMP_UNREACH_NET }, 745 { "host", ICMP_UNREACH_HOST }, 746 { "protocol", ICMP_UNREACH_PROTOCOL }, 747 { "port", ICMP_UNREACH_PORT }, 748 { "needfrag", ICMP_UNREACH_NEEDFRAG }, 749 { "srcfail", ICMP_UNREACH_SRCFAIL }, 750 { "net-unknown", ICMP_UNREACH_NET_UNKNOWN }, 751 { "host-unknown", ICMP_UNREACH_HOST_UNKNOWN }, 752 { "isolated", ICMP_UNREACH_ISOLATED }, 753 { "net-prohib", ICMP_UNREACH_NET_PROHIB }, 754 { "host-prohib", ICMP_UNREACH_HOST_PROHIB }, 755 { "tosnet", ICMP_UNREACH_TOSNET }, 756 { "toshost", ICMP_UNREACH_TOSHOST }, 757 { "filter-prohib", ICMP_UNREACH_FILTER_PROHIB }, 758 { "host-precedence", ICMP_UNREACH_HOST_PRECEDENCE }, 759 { "precedence-cutoff", ICMP_UNREACH_PRECEDENCE_CUTOFF }, 760 { NULL, 0 } 761}; 762 763static void 764fill_reject_code(u_short *codep, char *str) 765{ 766 int val; 767 char *s; 768 769 val = strtoul(str, &s, 0); 770 if (s == str || *s != '\0' || val >= 0x100) 771 val = match_token(icmpcodes, str); 772 if (val < 0) 773 errx(EX_DATAERR, "unknown ICMP unreachable code ``%s''", str); 774 *codep = val; 775 return; 776} 777 778static void 779print_reject_code(uint16_t code) 780{ 781 char const *s = match_value(icmpcodes, code); 782 783 if (s != NULL) 784 printf("unreach %s", s); 785 else 786 printf("unreach %u", code); 787} 788 789static struct _s_x icmp6codes[] = { 790 { "no-route", ICMP6_DST_UNREACH_NOROUTE }, 791 { "admin-prohib", ICMP6_DST_UNREACH_ADMIN }, 792 { "address", ICMP6_DST_UNREACH_ADDR }, 793 { "port", ICMP6_DST_UNREACH_NOPORT }, 794 { NULL, 0 } 795}; 796 797static void 798fill_unreach6_code(u_short *codep, char *str) 799{ 800 int val; 801 char *s; 802 803 val = strtoul(str, &s, 0); 804 if (s == str || *s != '\0' || val >= 0x100) 805 val = match_token(icmp6codes, str); 806 if (val < 0) 807 errx(EX_DATAERR, "unknown ICMPv6 unreachable code ``%s''", str); 808 *codep = val; 809 return; 810} 811 812static void 813print_unreach6_code(uint16_t code) 814{ 815 char const *s = match_value(icmp6codes, code); 816 817 if (s != NULL) 818 printf("unreach6 %s", s); 819 else 820 printf("unreach6 %u", code); 821} 822 823/* 824 * Returns the number of bits set (from left) in a contiguous bitmask, 825 * or -1 if the mask is not contiguous. 826 * XXX this needs a proper fix. 827 * This effectively works on masks in big-endian (network) format. 828 * when compiled on little endian architectures. 829 * 830 * First bit is bit 7 of the first byte -- note, for MAC addresses, 831 * the first bit on the wire is bit 0 of the first byte. 832 * len is the max length in bits. 833 */ 834static int 835contigmask(uint8_t *p, int len) 836{ 837 int i, n; 838 839 for (i=0; i<len ; i++) 840 if ( (p[i/8] & (1 << (7 - (i%8)))) == 0) /* first bit unset */ 841 break; 842 for (n=i+1; n < len; n++) 843 if ( (p[n/8] & (1 << (7 - (n%8)))) != 0) 844 return -1; /* mask not contiguous */ 845 return i; 846} 847 848/* 849 * print flags set/clear in the two bitmasks passed as parameters. 850 * There is a specialized check for f_tcpflags. 851 */ 852static void 853print_flags(char const *name, ipfw_insn *cmd, struct _s_x *list) 854{ 855 char const *comma = ""; 856 int i; 857 uint8_t set = cmd->arg1 & 0xff; 858 uint8_t clear = (cmd->arg1 >> 8) & 0xff; 859 860 if (list == f_tcpflags && set == TH_SYN && clear == TH_ACK) { 861 printf(" setup"); 862 return; 863 } 864 865 printf(" %s ", name); 866 for (i=0; list[i].x != 0; i++) { 867 if (set & list[i].x) { 868 set &= ~list[i].x; 869 printf("%s%s", comma, list[i].s); 870 comma = ","; 871 } 872 if (clear & list[i].x) { 873 clear &= ~list[i].x; 874 printf("%s!%s", comma, list[i].s); 875 comma = ","; 876 } 877 } 878} 879 880/* 881 * Print the ip address contained in a command. 882 */ 883static void 884print_ip(ipfw_insn_ip *cmd, char const *s) 885{ 886 struct hostent *he = NULL; 887 int len = F_LEN((ipfw_insn *)cmd); 888 uint32_t *a = ((ipfw_insn_u32 *)cmd)->d; 889 890 printf("%s%s ", cmd->o.len & F_NOT ? " not": "", s); 891 892 if (cmd->o.opcode == O_IP_SRC_ME || cmd->o.opcode == O_IP_DST_ME) { 893 printf("me"); 894 return; 895 } 896 if (cmd->o.opcode == O_IP_SRC_LOOKUP || 897 cmd->o.opcode == O_IP_DST_LOOKUP) { 898 printf("table(%u", ((ipfw_insn *)cmd)->arg1); 899 if (len == F_INSN_SIZE(ipfw_insn_u32)) 900 printf(",%u", *a); 901 printf(")"); 902 return; 903 } 904 if (cmd->o.opcode == O_IP_SRC_SET || cmd->o.opcode == O_IP_DST_SET) { 905 uint32_t x, *map = (uint32_t *)&(cmd->mask); 906 int i, j; 907 char comma = '{'; 908 909 x = cmd->o.arg1 - 1; 910 x = htonl( ~x ); 911 cmd->addr.s_addr = htonl(cmd->addr.s_addr); 912 printf("%s/%d", inet_ntoa(cmd->addr), 913 contigmask((uint8_t *)&x, 32)); 914 x = cmd->addr.s_addr = htonl(cmd->addr.s_addr); 915 x &= 0xff; /* base */ 916 /* 917 * Print bits and ranges. 918 * Locate first bit set (i), then locate first bit unset (j). 919 * If we have 3+ consecutive bits set, then print them as a 920 * range, otherwise only print the initial bit and rescan. 921 */ 922 for (i=0; i < cmd->o.arg1; i++) 923 if (map[i/32] & (1<<(i & 31))) { 924 for (j=i+1; j < cmd->o.arg1; j++) 925 if (!(map[ j/32] & (1<<(j & 31)))) 926 break; 927 printf("%c%d", comma, i+x); 928 if (j>i+2) { /* range has at least 3 elements */ 929 printf("-%d", j-1+x); 930 i = j-1; 931 } 932 comma = ','; 933 } 934 printf("}"); 935 return; 936 } 937 /* 938 * len == 2 indicates a single IP, whereas lists of 1 or more 939 * addr/mask pairs have len = (2n+1). We convert len to n so we 940 * use that to count the number of entries. 941 */ 942 for (len = len / 2; len > 0; len--, a += 2) { 943 int mb = /* mask length */ 944 (cmd->o.opcode == O_IP_SRC || cmd->o.opcode == O_IP_DST) ? 945 32 : contigmask((uint8_t *)&(a[1]), 32); 946 if (mb == 32 && co.do_resolv) 947 he = gethostbyaddr((char *)&(a[0]), sizeof(u_long), AF_INET); 948 if (he != NULL) /* resolved to name */ 949 printf("%s", he->h_name); 950 else if (mb == 0) /* any */ 951 printf("any"); 952 else { /* numeric IP followed by some kind of mask */ 953 printf("%s", inet_ntoa( *((struct in_addr *)&a[0]) ) ); 954 if (mb < 0) 955 printf(":%s", inet_ntoa( *((struct in_addr *)&a[1]) ) ); 956 else if (mb < 32) 957 printf("/%d", mb); 958 } 959 if (len > 1) 960 printf(","); 961 } 962} 963 964/* 965 * prints a MAC address/mask pair 966 */ 967static void 968print_mac(uint8_t *addr, uint8_t *mask) 969{ 970 int l = contigmask(mask, 48); 971 972 if (l == 0) 973 printf(" any"); 974 else { 975 printf(" %02x:%02x:%02x:%02x:%02x:%02x", 976 addr[0], addr[1], addr[2], addr[3], addr[4], addr[5]); 977 if (l == -1) 978 printf("&%02x:%02x:%02x:%02x:%02x:%02x", 979 mask[0], mask[1], mask[2], 980 mask[3], mask[4], mask[5]); 981 else if (l < 48) 982 printf("/%d", l); 983 } 984} 985 986static void 987fill_icmptypes(ipfw_insn_u32 *cmd, char *av) 988{ 989 uint8_t type; 990 991 cmd->d[0] = 0; 992 while (*av) { 993 if (*av == ',') 994 av++; 995 996 type = strtoul(av, &av, 0); 997 998 if (*av != ',' && *av != '\0') 999 errx(EX_DATAERR, "invalid ICMP type"); 1000 1001 if (type > 31) 1002 errx(EX_DATAERR, "ICMP type out of range"); 1003 1004 cmd->d[0] |= 1 << type; 1005 } 1006 cmd->o.opcode = O_ICMPTYPE; 1007 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32); 1008} 1009 1010static void 1011print_icmptypes(ipfw_insn_u32 *cmd) 1012{ 1013 int i; 1014 char sep= ' '; 1015 1016 printf(" icmptypes"); 1017 for (i = 0; i < 32; i++) { 1018 if ( (cmd->d[0] & (1 << (i))) == 0) 1019 continue; 1020 printf("%c%d", sep, i); 1021 sep = ','; 1022 } 1023} 1024 1025/* 1026 * Print the ip address contained in a command. 1027 */ 1028static void 1029print_ip6(ipfw_insn_ip6 *cmd, char const *s) 1030{ 1031 struct hostent *he = NULL; 1032 int len = F_LEN((ipfw_insn *) cmd) - 1; 1033 struct in6_addr *a = &(cmd->addr6); 1034 char trad[255]; 1035 1036 printf("%s%s ", cmd->o.len & F_NOT ? " not": "", s); 1037 1038 if (cmd->o.opcode == O_IP6_SRC_ME || cmd->o.opcode == O_IP6_DST_ME) { 1039 printf("me6"); 1040 return; 1041 } 1042 if (cmd->o.opcode == O_IP6) { 1043 printf(" ip6"); 1044 return; 1045 } 1046 1047 /* 1048 * len == 4 indicates a single IP, whereas lists of 1 or more 1049 * addr/mask pairs have len = (2n+1). We convert len to n so we 1050 * use that to count the number of entries. 1051 */ 1052 1053 for (len = len / 4; len > 0; len -= 2, a += 2) { 1054 int mb = /* mask length */ 1055 (cmd->o.opcode == O_IP6_SRC || cmd->o.opcode == O_IP6_DST) ? 1056 128 : contigmask((uint8_t *)&(a[1]), 128); 1057 1058 if (mb == 128 && co.do_resolv) 1059 he = gethostbyaddr((char *)a, sizeof(*a), AF_INET6); 1060 if (he != NULL) /* resolved to name */ 1061 printf("%s", he->h_name); 1062 else if (mb == 0) /* any */ 1063 printf("any"); 1064 else { /* numeric IP followed by some kind of mask */ 1065 if (inet_ntop(AF_INET6, a, trad, sizeof( trad ) ) == NULL) 1066 printf("Error ntop in print_ip6\n"); 1067 printf("%s", trad ); 1068 if (mb < 0) /* XXX not really legal... */ 1069 printf(":%s", 1070 inet_ntop(AF_INET6, &a[1], trad, sizeof(trad))); 1071 else if (mb < 128) 1072 printf("/%d", mb); 1073 } 1074 if (len > 2) 1075 printf(","); 1076 } 1077} 1078 1079static void 1080fill_icmp6types(ipfw_insn_icmp6 *cmd, char *av) 1081{ 1082 uint8_t type; 1083 1084 bzero(cmd, sizeof(*cmd)); 1085 while (*av) { 1086 if (*av == ',') 1087 av++; 1088 type = strtoul(av, &av, 0); 1089 if (*av != ',' && *av != '\0') 1090 errx(EX_DATAERR, "invalid ICMP6 type"); 1091 /* 1092 * XXX: shouldn't this be 0xFF? I can't see any reason why 1093 * we shouldn't be able to filter all possiable values 1094 * regardless of the ability of the rest of the kernel to do 1095 * anything useful with them. 1096 */ 1097 if (type > ICMP6_MAXTYPE) 1098 errx(EX_DATAERR, "ICMP6 type out of range"); 1099 cmd->d[type / 32] |= ( 1 << (type % 32)); 1100 } 1101 cmd->o.opcode = O_ICMP6TYPE; 1102 cmd->o.len |= F_INSN_SIZE(ipfw_insn_icmp6); 1103} 1104 1105 1106static void 1107print_icmp6types(ipfw_insn_u32 *cmd) 1108{ 1109 int i, j; 1110 char sep= ' '; 1111 1112 printf(" ip6 icmp6types"); 1113 for (i = 0; i < 7; i++) 1114 for (j=0; j < 32; ++j) { 1115 if ( (cmd->d[i] & (1 << (j))) == 0) 1116 continue; 1117 printf("%c%d", sep, (i*32 + j)); 1118 sep = ','; 1119 } 1120} 1121 1122static void 1123print_flow6id( ipfw_insn_u32 *cmd) 1124{ 1125 uint16_t i, limit = cmd->o.arg1; 1126 char sep = ','; 1127 1128 printf(" flow-id "); 1129 for( i=0; i < limit; ++i) { 1130 if (i == limit - 1) 1131 sep = ' '; 1132 printf("%d%c", cmd->d[i], sep); 1133 } 1134} 1135 1136/* structure and define for the extension header in ipv6 */ 1137static struct _s_x ext6hdrcodes[] = { 1138 { "frag", EXT_FRAGMENT }, 1139 { "hopopt", EXT_HOPOPTS }, 1140 { "route", EXT_ROUTING }, 1141 { "dstopt", EXT_DSTOPTS }, 1142 { "ah", EXT_AH }, 1143 { "esp", EXT_ESP }, 1144 { "rthdr0", EXT_RTHDR0 }, 1145 { "rthdr2", EXT_RTHDR2 }, 1146 { NULL, 0 } 1147}; 1148 1149/* fills command for the extension header filtering */ 1150static int 1151fill_ext6hdr( ipfw_insn *cmd, char *av) 1152{ 1153 int tok; 1154 char *s = av; 1155 1156 cmd->arg1 = 0; 1157 1158 while(s) { 1159 av = strsep( &s, ",") ; 1160 tok = match_token(ext6hdrcodes, av); 1161 switch (tok) { 1162 case EXT_FRAGMENT: 1163 cmd->arg1 |= EXT_FRAGMENT; 1164 break; 1165 1166 case EXT_HOPOPTS: 1167 cmd->arg1 |= EXT_HOPOPTS; 1168 break; 1169 1170 case EXT_ROUTING: 1171 cmd->arg1 |= EXT_ROUTING; 1172 break; 1173 1174 case EXT_DSTOPTS: 1175 cmd->arg1 |= EXT_DSTOPTS; 1176 break; 1177 1178 case EXT_AH: 1179 cmd->arg1 |= EXT_AH; 1180 break; 1181 1182 case EXT_ESP: 1183 cmd->arg1 |= EXT_ESP; 1184 break; 1185 1186 case EXT_RTHDR0: 1187 cmd->arg1 |= EXT_RTHDR0; 1188 break; 1189 1190 case EXT_RTHDR2: 1191 cmd->arg1 |= EXT_RTHDR2; 1192 break; 1193 1194 default: 1195 errx( EX_DATAERR, "invalid option for ipv6 exten header" ); 1196 break; 1197 } 1198 } 1199 if (cmd->arg1 == 0 ) 1200 return 0; 1201 cmd->opcode = O_EXT_HDR; 1202 cmd->len |= F_INSN_SIZE( ipfw_insn ); 1203 return 1; 1204} 1205 1206static void 1207print_ext6hdr( ipfw_insn *cmd ) 1208{ 1209 char sep = ' '; 1210 1211 printf(" extension header:"); 1212 if (cmd->arg1 & EXT_FRAGMENT ) { 1213 printf("%cfragmentation", sep); 1214 sep = ','; 1215 } 1216 if (cmd->arg1 & EXT_HOPOPTS ) { 1217 printf("%chop options", sep); 1218 sep = ','; 1219 } 1220 if (cmd->arg1 & EXT_ROUTING ) { 1221 printf("%crouting options", sep); 1222 sep = ','; 1223 } 1224 if (cmd->arg1 & EXT_RTHDR0 ) { 1225 printf("%crthdr0", sep); 1226 sep = ','; 1227 } 1228 if (cmd->arg1 & EXT_RTHDR2 ) { 1229 printf("%crthdr2", sep); 1230 sep = ','; 1231 } 1232 if (cmd->arg1 & EXT_DSTOPTS ) { 1233 printf("%cdestination options", sep); 1234 sep = ','; 1235 } 1236 if (cmd->arg1 & EXT_AH ) { 1237 printf("%cauthentication header", sep); 1238 sep = ','; 1239 } 1240 if (cmd->arg1 & EXT_ESP ) { 1241 printf("%cencapsulated security payload", sep); 1242 } 1243} 1244 1245/* 1246 * show_ipfw() prints the body of an ipfw rule. 1247 * Because the standard rule has at least proto src_ip dst_ip, we use 1248 * a helper function to produce these entries if not provided explicitly. 1249 * The first argument is the list of fields we have, the second is 1250 * the list of fields we want to be printed. 1251 * 1252 * Special cases if we have provided a MAC header: 1253 * + if the rule does not contain IP addresses/ports, do not print them; 1254 * + if the rule does not contain an IP proto, print "all" instead of "ip"; 1255 * 1256 * Once we have 'have_options', IP header fields are printed as options. 1257 */ 1258#define HAVE_PROTO 0x0001 1259#define HAVE_SRCIP 0x0002 1260#define HAVE_DSTIP 0x0004 1261#define HAVE_PROTO4 0x0008 1262#define HAVE_PROTO6 0x0010 1263#define HAVE_OPTIONS 0x8000 1264 1265#define HAVE_IP (HAVE_PROTO | HAVE_SRCIP | HAVE_DSTIP) 1266static void 1267show_prerequisites(int *flags, int want, int cmd __unused) 1268{ 1269 if (co.comment_only) 1270 return; 1271 if ( (*flags & HAVE_IP) == HAVE_IP) 1272 *flags |= HAVE_OPTIONS; 1273 1274 if ( !(*flags & HAVE_OPTIONS)) { 1275 if ( !(*flags & HAVE_PROTO) && (want & HAVE_PROTO)) { 1276 if ( (*flags & HAVE_PROTO4)) 1277 printf(" ip4"); 1278 else if ( (*flags & HAVE_PROTO6)) 1279 printf(" ip6"); 1280 else 1281 printf(" ip"); 1282 } 1283 if ( !(*flags & HAVE_SRCIP) && (want & HAVE_SRCIP)) 1284 printf(" from any"); 1285 if ( !(*flags & HAVE_DSTIP) && (want & HAVE_DSTIP)) 1286 printf(" to any"); 1287 } 1288 *flags |= want; 1289} 1290 1291static void 1292show_ipfw(struct ip_fw *rule, int pcwidth, int bcwidth) 1293{ 1294 static int twidth = 0; 1295 int l; 1296 ipfw_insn *cmd, *tagptr = NULL; 1297 const char *comment = NULL; /* ptr to comment if we have one */ 1298 int proto = 0; /* default */ 1299 int flags = 0; /* prerequisites */ 1300 ipfw_insn_log *logptr = NULL; /* set if we find an O_LOG */ 1301 ipfw_insn_altq *altqptr = NULL; /* set if we find an O_ALTQ */ 1302 int or_block = 0; /* we are in an or block */ 1303 uint32_t set_disable; 1304 1305 bcopy(&rule->next_rule, &set_disable, sizeof(set_disable)); 1306 1307 if (set_disable & (1 << rule->set)) { /* disabled */ 1308 if (!co.show_sets) 1309 return; 1310 else 1311 printf("# DISABLED "); 1312 } 1313 printf("%05u ", rule->rulenum); 1314 1315 if (pcwidth>0 || bcwidth>0) 1316 printf("%*llu %*llu ", pcwidth, align_uint64(&rule->pcnt), 1317 bcwidth, align_uint64(&rule->bcnt)); 1318 1319 if (co.do_time == 2) 1320 printf("%10u ", rule->timestamp); 1321 else if (co.do_time == 1) { 1322 char timestr[30]; 1323 time_t t = (time_t)0; 1324 1325 if (twidth == 0) { 1326 strcpy(timestr, ctime(&t)); 1327 *strchr(timestr, '\n') = '\0'; 1328 twidth = strlen(timestr); 1329 } 1330 if (rule->timestamp) { 1331 t = _long_to_time(rule->timestamp); 1332 1333 strcpy(timestr, ctime(&t)); 1334 *strchr(timestr, '\n') = '\0'; 1335 printf("%s ", timestr); 1336 } else { 1337 printf("%*s", twidth, " "); 1338 } 1339 } 1340 1341 if (co.show_sets) 1342 printf("set %d ", rule->set); 1343 1344 /* 1345 * print the optional "match probability" 1346 */ 1347 if (rule->cmd_len > 0) { 1348 cmd = rule->cmd ; 1349 if (cmd->opcode == O_PROB) { 1350 ipfw_insn_u32 *p = (ipfw_insn_u32 *)cmd; 1351 double d = 1.0 * p->d[0]; 1352 1353 d = (d / 0x7fffffff); 1354 printf("prob %f ", d); 1355 } 1356 } 1357 1358 /* 1359 * first print actions 1360 */ 1361 for (l = rule->cmd_len - rule->act_ofs, cmd = ACTION_PTR(rule); 1362 l > 0 ; l -= F_LEN(cmd), cmd += F_LEN(cmd)) { 1363 switch(cmd->opcode) { 1364 case O_CHECK_STATE: 1365 printf("check-state"); 1366 flags = HAVE_IP; /* avoid printing anything else */ 1367 break; 1368 1369 case O_ACCEPT: 1370 printf("allow"); 1371 break; 1372 1373 case O_COUNT: 1374 printf("count"); 1375 break; 1376 1377 case O_DENY: 1378 printf("deny"); 1379 break; 1380 1381 case O_REJECT: 1382 if (cmd->arg1 == ICMP_REJECT_RST) 1383 printf("reset"); 1384 else if (cmd->arg1 == ICMP_UNREACH_HOST) 1385 printf("reject"); 1386 else 1387 print_reject_code(cmd->arg1); 1388 break; 1389 1390 case O_UNREACH6: 1391 if (cmd->arg1 == ICMP6_UNREACH_RST) 1392 printf("reset6"); 1393 else 1394 print_unreach6_code(cmd->arg1); 1395 break; 1396 1397 case O_SKIPTO: 1398 PRINT_UINT_ARG("skipto ", cmd->arg1); 1399 break; 1400 1401 case O_PIPE: 1402 PRINT_UINT_ARG("pipe ", cmd->arg1); 1403 break; 1404 1405 case O_QUEUE: 1406 PRINT_UINT_ARG("queue ", cmd->arg1); 1407 break; 1408 1409 case O_DIVERT: 1410 PRINT_UINT_ARG("divert ", cmd->arg1); 1411 break; 1412 1413 case O_TEE: 1414 PRINT_UINT_ARG("tee ", cmd->arg1); 1415 break; 1416 1417 case O_NETGRAPH: 1418 PRINT_UINT_ARG("netgraph ", cmd->arg1); 1419 break; 1420 1421 case O_NGTEE: 1422 PRINT_UINT_ARG("ngtee ", cmd->arg1); 1423 break; 1424 1425 case O_FORWARD_IP: 1426 { 1427 ipfw_insn_sa *s = (ipfw_insn_sa *)cmd; 1428 1429 if (s->sa.sin_addr.s_addr == INADDR_ANY) { 1430 printf("fwd tablearg"); 1431 } else { 1432 printf("fwd %s", inet_ntoa(s->sa.sin_addr)); 1433 } 1434 if (s->sa.sin_port) 1435 printf(",%d", s->sa.sin_port); 1436 } 1437 break; 1438 1439 case O_LOG: /* O_LOG is printed last */ 1440 logptr = (ipfw_insn_log *)cmd; 1441 break; 1442 1443 case O_ALTQ: /* O_ALTQ is printed after O_LOG */ 1444 altqptr = (ipfw_insn_altq *)cmd; 1445 break; 1446 1447 case O_TAG: 1448 tagptr = cmd; 1449 break; 1450 1451 case O_NAT: 1452 PRINT_UINT_ARG("nat ", cmd->arg1); 1453 break; 1454 1455 case O_SETFIB: 1456 PRINT_UINT_ARG("setfib ", cmd->arg1); 1457 break; 1458 1459 default: 1460 printf("** unrecognized action %d len %d ", 1461 cmd->opcode, cmd->len); 1462 } 1463 } 1464 if (logptr) { 1465 if (logptr->max_log > 0) 1466 printf(" log logamount %d", logptr->max_log); 1467 else 1468 printf(" log"); 1469 } 1470 if (altqptr) { 1471 const char *qname; 1472 1473 qname = altq_qid_to_name(altqptr->qid); 1474 if (qname == NULL) 1475 printf(" altq ?<%u>", altqptr->qid); 1476 else 1477 printf(" altq %s", qname); 1478 } 1479 if (tagptr) { 1480 if (tagptr->len & F_NOT) 1481 PRINT_UINT_ARG(" untag ", tagptr->arg1); 1482 else 1483 PRINT_UINT_ARG(" tag ", tagptr->arg1); 1484 } 1485 1486 /* 1487 * then print the body. 1488 */ 1489 for (l = rule->act_ofs, cmd = rule->cmd ; 1490 l > 0 ; l -= F_LEN(cmd) , cmd += F_LEN(cmd)) { 1491 if ((cmd->len & F_OR) || (cmd->len & F_NOT)) 1492 continue; 1493 if (cmd->opcode == O_IP4) { 1494 flags |= HAVE_PROTO4; 1495 break; 1496 } else if (cmd->opcode == O_IP6) { 1497 flags |= HAVE_PROTO6; 1498 break; 1499 } 1500 } 1501 if (rule->_pad & 1) { /* empty rules before options */ 1502 if (!co.do_compact) { 1503 show_prerequisites(&flags, HAVE_PROTO, 0); 1504 printf(" from any to any"); 1505 } 1506 flags |= HAVE_IP | HAVE_OPTIONS; 1507 } 1508 1509 if (co.comment_only) 1510 comment = "..."; 1511 1512 for (l = rule->act_ofs, cmd = rule->cmd ; 1513 l > 0 ; l -= F_LEN(cmd) , cmd += F_LEN(cmd)) { 1514 /* useful alias */ 1515 ipfw_insn_u32 *cmd32 = (ipfw_insn_u32 *)cmd; 1516 1517 if (co.comment_only) { 1518 if (cmd->opcode != O_NOP) 1519 continue; 1520 printf(" // %s\n", (char *)(cmd + 1)); 1521 return; 1522 } 1523 1524 show_prerequisites(&flags, 0, cmd->opcode); 1525 1526 switch(cmd->opcode) { 1527 case O_PROB: 1528 break; /* done already */ 1529 1530 case O_PROBE_STATE: 1531 break; /* no need to print anything here */ 1532 1533 case O_IP_SRC: 1534 case O_IP_SRC_LOOKUP: 1535 case O_IP_SRC_MASK: 1536 case O_IP_SRC_ME: 1537 case O_IP_SRC_SET: 1538 show_prerequisites(&flags, HAVE_PROTO, 0); 1539 if (!(flags & HAVE_SRCIP)) 1540 printf(" from"); 1541 if ((cmd->len & F_OR) && !or_block) 1542 printf(" {"); 1543 print_ip((ipfw_insn_ip *)cmd, 1544 (flags & HAVE_OPTIONS) ? " src-ip" : ""); 1545 flags |= HAVE_SRCIP; 1546 break; 1547 1548 case O_IP_DST: 1549 case O_IP_DST_LOOKUP: 1550 case O_IP_DST_MASK: 1551 case O_IP_DST_ME: 1552 case O_IP_DST_SET: 1553 show_prerequisites(&flags, HAVE_PROTO|HAVE_SRCIP, 0); 1554 if (!(flags & HAVE_DSTIP)) 1555 printf(" to"); 1556 if ((cmd->len & F_OR) && !or_block) 1557 printf(" {"); 1558 print_ip((ipfw_insn_ip *)cmd, 1559 (flags & HAVE_OPTIONS) ? " dst-ip" : ""); 1560 flags |= HAVE_DSTIP; 1561 break; 1562 1563 case O_IP6_SRC: 1564 case O_IP6_SRC_MASK: 1565 case O_IP6_SRC_ME: 1566 show_prerequisites(&flags, HAVE_PROTO, 0); 1567 if (!(flags & HAVE_SRCIP)) 1568 printf(" from"); 1569 if ((cmd->len & F_OR) && !or_block) 1570 printf(" {"); 1571 print_ip6((ipfw_insn_ip6 *)cmd, 1572 (flags & HAVE_OPTIONS) ? " src-ip6" : ""); 1573 flags |= HAVE_SRCIP | HAVE_PROTO; 1574 break; 1575 1576 case O_IP6_DST: 1577 case O_IP6_DST_MASK: 1578 case O_IP6_DST_ME: 1579 show_prerequisites(&flags, HAVE_PROTO|HAVE_SRCIP, 0); 1580 if (!(flags & HAVE_DSTIP)) 1581 printf(" to"); 1582 if ((cmd->len & F_OR) && !or_block) 1583 printf(" {"); 1584 print_ip6((ipfw_insn_ip6 *)cmd, 1585 (flags & HAVE_OPTIONS) ? " dst-ip6" : ""); 1586 flags |= HAVE_DSTIP; 1587 break; 1588 1589 case O_FLOW6ID: 1590 print_flow6id( (ipfw_insn_u32 *) cmd ); 1591 flags |= HAVE_OPTIONS; 1592 break; 1593 1594 case O_IP_DSTPORT: 1595 show_prerequisites(&flags, HAVE_IP, 0); 1596 case O_IP_SRCPORT: 1597 show_prerequisites(&flags, HAVE_PROTO|HAVE_SRCIP, 0); 1598 if ((cmd->len & F_OR) && !or_block) 1599 printf(" {"); 1600 if (cmd->len & F_NOT) 1601 printf(" not"); 1602 print_newports((ipfw_insn_u16 *)cmd, proto, 1603 (flags & HAVE_OPTIONS) ? cmd->opcode : 0); 1604 break; 1605 1606 case O_PROTO: { 1607 struct protoent *pe = NULL; 1608 1609 if ((cmd->len & F_OR) && !or_block) 1610 printf(" {"); 1611 if (cmd->len & F_NOT) 1612 printf(" not"); 1613 proto = cmd->arg1; 1614 pe = getprotobynumber(cmd->arg1); 1615 if ((flags & (HAVE_PROTO4 | HAVE_PROTO6)) && 1616 !(flags & HAVE_PROTO)) 1617 show_prerequisites(&flags, 1618 HAVE_IP | HAVE_OPTIONS, 0); 1619 if (flags & HAVE_OPTIONS) 1620 printf(" proto"); 1621 if (pe) 1622 printf(" %s", pe->p_name); 1623 else 1624 printf(" %u", cmd->arg1); 1625 } 1626 flags |= HAVE_PROTO; 1627 break; 1628 1629 default: /*options ... */ 1630 if (!(cmd->len & (F_OR|F_NOT))) 1631 if (((cmd->opcode == O_IP6) && 1632 (flags & HAVE_PROTO6)) || 1633 ((cmd->opcode == O_IP4) && 1634 (flags & HAVE_PROTO4))) 1635 break; 1636 show_prerequisites(&flags, HAVE_IP | HAVE_OPTIONS, 0); 1637 if ((cmd->len & F_OR) && !or_block) 1638 printf(" {"); 1639 if (cmd->len & F_NOT && cmd->opcode != O_IN) 1640 printf(" not"); 1641 switch(cmd->opcode) { 1642 case O_MACADDR2: { 1643 ipfw_insn_mac *m = (ipfw_insn_mac *)cmd; 1644 1645 printf(" MAC"); 1646 print_mac(m->addr, m->mask); 1647 print_mac(m->addr + 6, m->mask + 6); 1648 } 1649 break; 1650 1651 case O_MAC_TYPE: 1652 print_newports((ipfw_insn_u16 *)cmd, 1653 IPPROTO_ETHERTYPE, cmd->opcode); 1654 break; 1655 1656 1657 case O_FRAG: 1658 printf(" frag"); 1659 break; 1660 1661 case O_FIB: 1662 printf(" fib %u", cmd->arg1 ); 1663 break; 1664 1665 case O_IN: 1666 printf(cmd->len & F_NOT ? " out" : " in"); 1667 break; 1668 1669 case O_DIVERTED: 1670 switch (cmd->arg1) { 1671 case 3: 1672 printf(" diverted"); 1673 break; 1674 case 1: 1675 printf(" diverted-loopback"); 1676 break; 1677 case 2: 1678 printf(" diverted-output"); 1679 break; 1680 default: 1681 printf(" diverted-?<%u>", cmd->arg1); 1682 break; 1683 } 1684 break; 1685 1686 case O_LAYER2: 1687 printf(" layer2"); 1688 break; 1689 case O_XMIT: 1690 case O_RECV: 1691 case O_VIA: 1692 { 1693 char const *s; 1694 ipfw_insn_if *cmdif = (ipfw_insn_if *)cmd; 1695 1696 if (cmd->opcode == O_XMIT) 1697 s = "xmit"; 1698 else if (cmd->opcode == O_RECV) 1699 s = "recv"; 1700 else /* if (cmd->opcode == O_VIA) */ 1701 s = "via"; 1702 if (cmdif->name[0] == '\0') 1703 printf(" %s %s", s, 1704 inet_ntoa(cmdif->p.ip)); 1705 else 1706 printf(" %s %s", s, cmdif->name); 1707 1708 break; 1709 } 1710 case O_IPID: 1711 if (F_LEN(cmd) == 1) 1712 printf(" ipid %u", cmd->arg1 ); 1713 else 1714 print_newports((ipfw_insn_u16 *)cmd, 0, 1715 O_IPID); 1716 break; 1717 1718 case O_IPTTL: 1719 if (F_LEN(cmd) == 1) 1720 printf(" ipttl %u", cmd->arg1 ); 1721 else 1722 print_newports((ipfw_insn_u16 *)cmd, 0, 1723 O_IPTTL); 1724 break; 1725 1726 case O_IPVER: 1727 printf(" ipver %u", cmd->arg1 ); 1728 break; 1729 1730 case O_IPPRECEDENCE: 1731 printf(" ipprecedence %u", (cmd->arg1) >> 5 ); 1732 break; 1733 1734 case O_IPLEN: 1735 if (F_LEN(cmd) == 1) 1736 printf(" iplen %u", cmd->arg1 ); 1737 else 1738 print_newports((ipfw_insn_u16 *)cmd, 0, 1739 O_IPLEN); 1740 break; 1741 1742 case O_IPOPT: 1743 print_flags("ipoptions", cmd, f_ipopts); 1744 break; 1745 1746 case O_IPTOS: 1747 print_flags("iptos", cmd, f_iptos); 1748 break; 1749 1750 case O_ICMPTYPE: 1751 print_icmptypes((ipfw_insn_u32 *)cmd); 1752 break; 1753 1754 case O_ESTAB: 1755 printf(" established"); 1756 break; 1757 1758 case O_TCPDATALEN: 1759 if (F_LEN(cmd) == 1) 1760 printf(" tcpdatalen %u", cmd->arg1 ); 1761 else 1762 print_newports((ipfw_insn_u16 *)cmd, 0, 1763 O_TCPDATALEN); 1764 break; 1765 1766 case O_TCPFLAGS: 1767 print_flags("tcpflags", cmd, f_tcpflags); 1768 break; 1769 1770 case O_TCPOPTS: 1771 print_flags("tcpoptions", cmd, f_tcpopts); 1772 break; 1773 1774 case O_TCPWIN: 1775 printf(" tcpwin %d", ntohs(cmd->arg1)); 1776 break; 1777 1778 case O_TCPACK: 1779 printf(" tcpack %d", ntohl(cmd32->d[0])); 1780 break; 1781 1782 case O_TCPSEQ: 1783 printf(" tcpseq %d", ntohl(cmd32->d[0])); 1784 break; 1785 1786 case O_UID: 1787 { 1788 struct passwd *pwd = getpwuid(cmd32->d[0]); 1789 1790 if (pwd) 1791 printf(" uid %s", pwd->pw_name); 1792 else 1793 printf(" uid %u", cmd32->d[0]); 1794 } 1795 break; 1796 1797 case O_GID: 1798 { 1799 struct group *grp = getgrgid(cmd32->d[0]); 1800 1801 if (grp) 1802 printf(" gid %s", grp->gr_name); 1803 else 1804 printf(" gid %u", cmd32->d[0]); 1805 } 1806 break; 1807 1808 case O_JAIL: 1809 printf(" jail %d", cmd32->d[0]); 1810 break; 1811 1812 case O_VERREVPATH: 1813 printf(" verrevpath"); 1814 break; 1815 1816 case O_VERSRCREACH: 1817 printf(" versrcreach"); 1818 break; 1819 1820 case O_ANTISPOOF: 1821 printf(" antispoof"); 1822 break; 1823 1824 case O_IPSEC: 1825 printf(" ipsec"); 1826 break; 1827 1828 case O_NOP: 1829 comment = (char *)(cmd + 1); 1830 break; 1831 1832 case O_KEEP_STATE: 1833 printf(" keep-state"); 1834 break; 1835 1836 case O_LIMIT: { 1837 struct _s_x *p = limit_masks; 1838 ipfw_insn_limit *c = (ipfw_insn_limit *)cmd; 1839 uint8_t x = c->limit_mask; 1840 char const *comma = " "; 1841 1842 printf(" limit"); 1843 for (; p->x != 0 ; p++) 1844 if ((x & p->x) == p->x) { 1845 x &= ~p->x; 1846 printf("%s%s", comma, p->s); 1847 comma = ","; 1848 } 1849 PRINT_UINT_ARG(" ", c->conn_limit); 1850 break; 1851 } 1852 1853 case O_IP6: 1854 printf(" ip6"); 1855 break; 1856 1857 case O_IP4: 1858 printf(" ip4"); 1859 break; 1860 1861 case O_ICMP6TYPE: 1862 print_icmp6types((ipfw_insn_u32 *)cmd); 1863 break; 1864 1865 case O_EXT_HDR: 1866 print_ext6hdr( (ipfw_insn *) cmd ); 1867 break; 1868 1869 case O_TAGGED: 1870 if (F_LEN(cmd) == 1) 1871 PRINT_UINT_ARG(" tagged ", cmd->arg1); 1872 else 1873 print_newports((ipfw_insn_u16 *)cmd, 0, 1874 O_TAGGED); 1875 break; 1876 1877 default: 1878 printf(" [opcode %d len %d]", 1879 cmd->opcode, cmd->len); 1880 } 1881 } 1882 if (cmd->len & F_OR) { 1883 printf(" or"); 1884 or_block = 1; 1885 } else if (or_block) { 1886 printf(" }"); 1887 or_block = 0; 1888 } 1889 } 1890 show_prerequisites(&flags, HAVE_IP, 0); 1891 if (comment) 1892 printf(" // %s", comment); 1893 printf("\n"); 1894} 1895 1896static void 1897show_dyn_ipfw(ipfw_dyn_rule *d, int pcwidth, int bcwidth) 1898{ 1899 struct protoent *pe; 1900 struct in_addr a; 1901 uint16_t rulenum; 1902 char buf[INET6_ADDRSTRLEN]; 1903 1904 if (!co.do_expired) { 1905 if (!d->expire && !(d->dyn_type == O_LIMIT_PARENT)) 1906 return; 1907 } 1908 bcopy(&d->rule, &rulenum, sizeof(rulenum)); 1909 printf("%05d", rulenum); 1910 if (pcwidth>0 || bcwidth>0) 1911 printf(" %*llu %*llu (%ds)", pcwidth, 1912 align_uint64(&d->pcnt), bcwidth, 1913 align_uint64(&d->bcnt), d->expire); 1914 switch (d->dyn_type) { 1915 case O_LIMIT_PARENT: 1916 printf(" PARENT %d", d->count); 1917 break; 1918 case O_LIMIT: 1919 printf(" LIMIT"); 1920 break; 1921 case O_KEEP_STATE: /* bidir, no mask */ 1922 printf(" STATE"); 1923 break; 1924 } 1925 1926 if ((pe = getprotobynumber(d->id.proto)) != NULL) 1927 printf(" %s", pe->p_name); 1928 else 1929 printf(" proto %u", d->id.proto); 1930 1931 if (d->id.addr_type == 4) { 1932 a.s_addr = htonl(d->id.src_ip); 1933 printf(" %s %d", inet_ntoa(a), d->id.src_port); 1934 1935 a.s_addr = htonl(d->id.dst_ip); 1936 printf(" <-> %s %d", inet_ntoa(a), d->id.dst_port); 1937 } else if (d->id.addr_type == 6) { 1938 printf(" %s %d", inet_ntop(AF_INET6, &d->id.src_ip6, buf, 1939 sizeof(buf)), d->id.src_port); 1940 printf(" <-> %s %d", inet_ntop(AF_INET6, &d->id.dst_ip6, buf, 1941 sizeof(buf)), d->id.dst_port); 1942 } else 1943 printf(" UNKNOWN <-> UNKNOWN\n"); 1944 1945 printf("\n"); 1946} 1947 1948/* 1949 * This one handles all set-related commands 1950 * ipfw set { show | enable | disable } 1951 * ipfw set swap X Y 1952 * ipfw set move X to Y 1953 * ipfw set move rule X to Y 1954 */ 1955void 1956ipfw_sets_handler(int ac, char *av[]) 1957{ 1958 uint32_t set_disable, masks[2]; 1959 int i, nbytes; 1960 uint16_t rulenum; 1961 uint8_t cmd, new_set; 1962 1963 ac--; 1964 av++; 1965 1966 if (!ac) 1967 errx(EX_USAGE, "set needs command"); 1968 if (_substrcmp(*av, "show") == 0) { 1969 void *data; 1970 char const *msg; 1971 1972 nbytes = sizeof(struct ip_fw); 1973 data = safe_calloc(1, nbytes); 1974 if (do_cmd(IP_FW_GET, data, (uintptr_t)&nbytes) < 0) 1975 err(EX_OSERR, "getsockopt(IP_FW_GET)"); 1976 bcopy(&((struct ip_fw *)data)->next_rule, 1977 &set_disable, sizeof(set_disable)); 1978 1979 for (i = 0, msg = "disable" ; i < RESVD_SET; i++) 1980 if ((set_disable & (1<<i))) { 1981 printf("%s %d", msg, i); 1982 msg = ""; 1983 } 1984 msg = (set_disable) ? " enable" : "enable"; 1985 for (i = 0; i < RESVD_SET; i++) 1986 if (!(set_disable & (1<<i))) { 1987 printf("%s %d", msg, i); 1988 msg = ""; 1989 } 1990 printf("\n"); 1991 } else if (_substrcmp(*av, "swap") == 0) { 1992 ac--; av++; 1993 if (ac != 2) 1994 errx(EX_USAGE, "set swap needs 2 set numbers\n"); 1995 rulenum = atoi(av[0]); 1996 new_set = atoi(av[1]); 1997 if (!isdigit(*(av[0])) || rulenum > RESVD_SET) 1998 errx(EX_DATAERR, "invalid set number %s\n", av[0]); 1999 if (!isdigit(*(av[1])) || new_set > RESVD_SET) 2000 errx(EX_DATAERR, "invalid set number %s\n", av[1]); 2001 masks[0] = (4 << 24) | (new_set << 16) | (rulenum); 2002 i = do_cmd(IP_FW_DEL, masks, sizeof(uint32_t)); 2003 } else if (_substrcmp(*av, "move") == 0) { 2004 ac--; av++; 2005 if (ac && _substrcmp(*av, "rule") == 0) { 2006 cmd = 2; 2007 ac--; av++; 2008 } else 2009 cmd = 3; 2010 if (ac != 3 || _substrcmp(av[1], "to") != 0) 2011 errx(EX_USAGE, "syntax: set move [rule] X to Y\n"); 2012 rulenum = atoi(av[0]); 2013 new_set = atoi(av[2]); 2014 if (!isdigit(*(av[0])) || (cmd == 3 && rulenum > RESVD_SET) || 2015 (cmd == 2 && rulenum == IPFW_DEFAULT_RULE) ) 2016 errx(EX_DATAERR, "invalid source number %s\n", av[0]); 2017 if (!isdigit(*(av[2])) || new_set > RESVD_SET) 2018 errx(EX_DATAERR, "invalid dest. set %s\n", av[1]); 2019 masks[0] = (cmd << 24) | (new_set << 16) | (rulenum); 2020 i = do_cmd(IP_FW_DEL, masks, sizeof(uint32_t)); 2021 } else if (_substrcmp(*av, "disable") == 0 || 2022 _substrcmp(*av, "enable") == 0 ) { 2023 int which = _substrcmp(*av, "enable") == 0 ? 1 : 0; 2024 2025 ac--; av++; 2026 masks[0] = masks[1] = 0; 2027 2028 while (ac) { 2029 if (isdigit(**av)) { 2030 i = atoi(*av); 2031 if (i < 0 || i > RESVD_SET) 2032 errx(EX_DATAERR, 2033 "invalid set number %d\n", i); 2034 masks[which] |= (1<<i); 2035 } else if (_substrcmp(*av, "disable") == 0) 2036 which = 0; 2037 else if (_substrcmp(*av, "enable") == 0) 2038 which = 1; 2039 else 2040 errx(EX_DATAERR, 2041 "invalid set command %s\n", *av); 2042 av++; ac--; 2043 } 2044 if ( (masks[0] & masks[1]) != 0 ) 2045 errx(EX_DATAERR, 2046 "cannot enable and disable the same set\n"); 2047 2048 i = do_cmd(IP_FW_DEL, masks, sizeof(masks)); 2049 if (i) 2050 warn("set enable/disable: setsockopt(IP_FW_DEL)"); 2051 } else 2052 errx(EX_USAGE, "invalid set command %s\n", *av); 2053} 2054 2055void 2056ipfw_sysctl_handler(int ac, char *av[], int which) 2057{ 2058 ac--; 2059 av++; 2060 2061 if (ac == 0) { 2062 warnx("missing keyword to enable/disable\n"); 2063 } else if (_substrcmp(*av, "firewall") == 0) { 2064 sysctlbyname("net.inet.ip.fw.enable", NULL, 0, 2065 &which, sizeof(which)); 2066 } else if (_substrcmp(*av, "one_pass") == 0) { 2067 sysctlbyname("net.inet.ip.fw.one_pass", NULL, 0, 2068 &which, sizeof(which)); 2069 } else if (_substrcmp(*av, "debug") == 0) { 2070 sysctlbyname("net.inet.ip.fw.debug", NULL, 0, 2071 &which, sizeof(which)); 2072 } else if (_substrcmp(*av, "verbose") == 0) { 2073 sysctlbyname("net.inet.ip.fw.verbose", NULL, 0, 2074 &which, sizeof(which)); 2075 } else if (_substrcmp(*av, "dyn_keepalive") == 0) { 2076 sysctlbyname("net.inet.ip.fw.dyn_keepalive", NULL, 0, 2077 &which, sizeof(which)); 2078 } else if (_substrcmp(*av, "altq") == 0) { 2079 altq_set_enabled(which); 2080 } else { 2081 warnx("unrecognize enable/disable keyword: %s\n", *av); 2082 } 2083} 2084 2085void 2086ipfw_list(int ac, char *av[], int show_counters) 2087{ 2088 struct ip_fw *r; 2089 ipfw_dyn_rule *dynrules, *d; 2090 2091#define NEXT(r) ((struct ip_fw *)((char *)r + RULESIZE(r))) 2092 char *lim; 2093 void *data = NULL; 2094 int bcwidth, n, nbytes, nstat, ndyn, pcwidth, width; 2095 int exitval = EX_OK; 2096 int lac; 2097 char **lav; 2098 u_long rnum, last; 2099 char *endptr; 2100 int seen = 0; 2101 uint8_t set; 2102 2103 const int ocmd = co.do_pipe ? IP_DUMMYNET_GET : IP_FW_GET; 2104 int nalloc = 1024; /* start somewhere... */ 2105 2106 last = 0; 2107 2108 if (co.test_only) { 2109 fprintf(stderr, "Testing only, list disabled\n"); 2110 return; 2111 } 2112 2113 ac--; 2114 av++; 2115 2116 /* get rules or pipes from kernel, resizing array as necessary */ 2117 nbytes = nalloc; 2118 2119 while (nbytes >= nalloc) { 2120 nalloc = nalloc * 2 + 200; 2121 nbytes = nalloc; 2122 data = safe_realloc(data, nbytes); 2123 if (do_cmd(ocmd, data, (uintptr_t)&nbytes) < 0) 2124 err(EX_OSERR, "getsockopt(IP_%s_GET)", 2125 co.do_pipe ? "DUMMYNET" : "FW"); 2126 } 2127 2128 if (co.do_pipe) { 2129 ipfw_list_pipes(data, nbytes, ac, av); 2130 goto done; 2131 } 2132 2133 /* 2134 * Count static rules. They have variable size so we 2135 * need to scan the list to count them. 2136 */ 2137 for (nstat = 1, r = data, lim = (char *)data + nbytes; 2138 r->rulenum < IPFW_DEFAULT_RULE && (char *)r < lim; 2139 ++nstat, r = NEXT(r) ) 2140 ; /* nothing */ 2141 2142 /* 2143 * Count dynamic rules. This is easier as they have 2144 * fixed size. 2145 */ 2146 r = NEXT(r); 2147 dynrules = (ipfw_dyn_rule *)r ; 2148 n = (char *)r - (char *)data; 2149 ndyn = (nbytes - n) / sizeof *dynrules; 2150 2151 /* if showing stats, figure out column widths ahead of time */ 2152 bcwidth = pcwidth = 0; 2153 if (show_counters) { 2154 for (n = 0, r = data; n < nstat; n++, r = NEXT(r)) { 2155 /* skip rules from another set */ 2156 if (co.use_set && r->set != co.use_set - 1) 2157 continue; 2158 2159 /* packet counter */ 2160 width = snprintf(NULL, 0, "%llu", 2161 align_uint64(&r->pcnt)); 2162 if (width > pcwidth) 2163 pcwidth = width; 2164 2165 /* byte counter */ 2166 width = snprintf(NULL, 0, "%llu", 2167 align_uint64(&r->bcnt)); 2168 if (width > bcwidth) 2169 bcwidth = width; 2170 } 2171 } 2172 if (co.do_dynamic && ndyn) { 2173 for (n = 0, d = dynrules; n < ndyn; n++, d++) { 2174 if (co.use_set) { 2175 /* skip rules from another set */ 2176 bcopy((char *)&d->rule + sizeof(uint16_t), 2177 &set, sizeof(uint8_t)); 2178 if (set != co.use_set - 1) 2179 continue; 2180 } 2181 width = snprintf(NULL, 0, "%llu", 2182 align_uint64(&d->pcnt)); 2183 if (width > pcwidth) 2184 pcwidth = width; 2185 2186 width = snprintf(NULL, 0, "%llu", 2187 align_uint64(&d->bcnt)); 2188 if (width > bcwidth) 2189 bcwidth = width; 2190 } 2191 } 2192 /* if no rule numbers were specified, list all rules */ 2193 if (ac == 0) { 2194 for (n = 0, r = data; n < nstat; n++, r = NEXT(r)) { 2195 if (co.use_set && r->set != co.use_set - 1) 2196 continue; 2197 show_ipfw(r, pcwidth, bcwidth); 2198 } 2199 2200 if (co.do_dynamic && ndyn) { 2201 printf("## Dynamic rules (%d):\n", ndyn); 2202 for (n = 0, d = dynrules; n < ndyn; n++, d++) { 2203 if (co.use_set) { 2204 bcopy((char *)&d->rule + sizeof(uint16_t), 2205 &set, sizeof(uint8_t)); 2206 if (set != co.use_set - 1) 2207 continue; 2208 } 2209 show_dyn_ipfw(d, pcwidth, bcwidth); 2210 } 2211 } 2212 goto done; 2213 } 2214 2215 /* display specific rules requested on command line */ 2216 2217 for (lac = ac, lav = av; lac != 0; lac--) { 2218 /* convert command line rule # */ 2219 last = rnum = strtoul(*lav++, &endptr, 10); 2220 if (*endptr == '-') 2221 last = strtoul(endptr+1, &endptr, 10); 2222 if (*endptr) { 2223 exitval = EX_USAGE; 2224 warnx("invalid rule number: %s", *(lav - 1)); 2225 continue; 2226 } 2227 for (n = seen = 0, r = data; n < nstat; n++, r = NEXT(r) ) { 2228 if (r->rulenum > last) 2229 break; 2230 if (co.use_set && r->set != co.use_set - 1) 2231 continue; 2232 if (r->rulenum >= rnum && r->rulenum <= last) { 2233 show_ipfw(r, pcwidth, bcwidth); 2234 seen = 1; 2235 } 2236 } 2237 if (!seen) { 2238 /* give precedence to other error(s) */ 2239 if (exitval == EX_OK) 2240 exitval = EX_UNAVAILABLE; 2241 warnx("rule %lu does not exist", rnum); 2242 } 2243 } 2244 2245 if (co.do_dynamic && ndyn) { 2246 printf("## Dynamic rules:\n"); 2247 for (lac = ac, lav = av; lac != 0; lac--) { 2248 last = rnum = strtoul(*lav++, &endptr, 10); 2249 if (*endptr == '-') 2250 last = strtoul(endptr+1, &endptr, 10); 2251 if (*endptr) 2252 /* already warned */ 2253 continue; 2254 for (n = 0, d = dynrules; n < ndyn; n++, d++) { 2255 uint16_t rulenum; 2256 2257 bcopy(&d->rule, &rulenum, sizeof(rulenum)); 2258 if (rulenum > rnum) 2259 break; 2260 if (co.use_set) { 2261 bcopy((char *)&d->rule + sizeof(uint16_t), 2262 &set, sizeof(uint8_t)); 2263 if (set != co.use_set - 1) 2264 continue; 2265 } 2266 if (r->rulenum >= rnum && r->rulenum <= last) 2267 show_dyn_ipfw(d, pcwidth, bcwidth); 2268 } 2269 } 2270 } 2271 2272 ac = 0; 2273 2274done: 2275 free(data); 2276 2277 if (exitval != EX_OK) 2278 exit(exitval); 2279#undef NEXT 2280} 2281 2282static int 2283lookup_host (char *host, struct in_addr *ipaddr) 2284{ 2285 struct hostent *he; 2286 2287 if (!inet_aton(host, ipaddr)) { 2288 if ((he = gethostbyname(host)) == NULL) 2289 return(-1); 2290 *ipaddr = *(struct in_addr *)he->h_addr_list[0]; 2291 } 2292 return(0); 2293} 2294 2295/* 2296 * fills the addr and mask fields in the instruction as appropriate from av. 2297 * Update length as appropriate. 2298 * The following formats are allowed: 2299 * me returns O_IP_*_ME 2300 * 1.2.3.4 single IP address 2301 * 1.2.3.4:5.6.7.8 address:mask 2302 * 1.2.3.4/24 address/mask 2303 * 1.2.3.4/26{1,6,5,4,23} set of addresses in a subnet 2304 * We can have multiple comma-separated address/mask entries. 2305 */ 2306static void 2307fill_ip(ipfw_insn_ip *cmd, char *av) 2308{ 2309 int len = 0; 2310 uint32_t *d = ((ipfw_insn_u32 *)cmd)->d; 2311 2312 cmd->o.len &= ~F_LEN_MASK; /* zero len */ 2313 2314 if (_substrcmp(av, "any") == 0) 2315 return; 2316 2317 if (_substrcmp(av, "me") == 0) { 2318 cmd->o.len |= F_INSN_SIZE(ipfw_insn); 2319 return; 2320 } 2321 2322 if (strncmp(av, "table(", 6) == 0) { 2323 char *p = strchr(av + 6, ','); 2324 2325 if (p) 2326 *p++ = '\0'; 2327 cmd->o.opcode = O_IP_DST_LOOKUP; 2328 cmd->o.arg1 = strtoul(av + 6, NULL, 0); 2329 if (p) { 2330 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32); 2331 d[0] = strtoul(p, NULL, 0); 2332 } else 2333 cmd->o.len |= F_INSN_SIZE(ipfw_insn); 2334 return; 2335 } 2336 2337 while (av) { 2338 /* 2339 * After the address we can have '/' or ':' indicating a mask, 2340 * ',' indicating another address follows, '{' indicating a 2341 * set of addresses of unspecified size. 2342 */ 2343 char *t = NULL, *p = strpbrk(av, "/:,{"); 2344 int masklen; 2345 char md, nd = '\0'; 2346 2347 if (p) { 2348 md = *p; 2349 *p++ = '\0'; 2350 if ((t = strpbrk(p, ",{")) != NULL) { 2351 nd = *t; 2352 *t = '\0'; 2353 } 2354 } else 2355 md = '\0'; 2356 2357 if (lookup_host(av, (struct in_addr *)&d[0]) != 0) 2358 errx(EX_NOHOST, "hostname ``%s'' unknown", av); 2359 switch (md) { 2360 case ':': 2361 if (!inet_aton(p, (struct in_addr *)&d[1])) 2362 errx(EX_DATAERR, "bad netmask ``%s''", p); 2363 break; 2364 case '/': 2365 masklen = atoi(p); 2366 if (masklen == 0) 2367 d[1] = htonl(0); /* mask */ 2368 else if (masklen > 32) 2369 errx(EX_DATAERR, "bad width ``%s''", p); 2370 else 2371 d[1] = htonl(~0 << (32 - masklen)); 2372 break; 2373 case '{': /* no mask, assume /24 and put back the '{' */ 2374 d[1] = htonl(~0 << (32 - 24)); 2375 *(--p) = md; 2376 break; 2377 2378 case ',': /* single address plus continuation */ 2379 *(--p) = md; 2380 /* FALLTHROUGH */ 2381 case 0: /* initialization value */ 2382 default: 2383 d[1] = htonl(~0); /* force /32 */ 2384 break; 2385 } 2386 d[0] &= d[1]; /* mask base address with mask */ 2387 if (t) 2388 *t = nd; 2389 /* find next separator */ 2390 if (p) 2391 p = strpbrk(p, ",{"); 2392 if (p && *p == '{') { 2393 /* 2394 * We have a set of addresses. They are stored as follows: 2395 * arg1 is the set size (powers of 2, 2..256) 2396 * addr is the base address IN HOST FORMAT 2397 * mask.. is an array of arg1 bits (rounded up to 2398 * the next multiple of 32) with bits set 2399 * for each host in the map. 2400 */ 2401 uint32_t *map = (uint32_t *)&cmd->mask; 2402 int low, high; 2403 int i = contigmask((uint8_t *)&(d[1]), 32); 2404 2405 if (len > 0) 2406 errx(EX_DATAERR, "address set cannot be in a list"); 2407 if (i < 24 || i > 31) 2408 errx(EX_DATAERR, "invalid set with mask %d\n", i); 2409 cmd->o.arg1 = 1<<(32-i); /* map length */ 2410 d[0] = ntohl(d[0]); /* base addr in host format */ 2411 cmd->o.opcode = O_IP_DST_SET; /* default */ 2412 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32) + (cmd->o.arg1+31)/32; 2413 for (i = 0; i < (cmd->o.arg1+31)/32 ; i++) 2414 map[i] = 0; /* clear map */ 2415 2416 av = p + 1; 2417 low = d[0] & 0xff; 2418 high = low + cmd->o.arg1 - 1; 2419 /* 2420 * Here, i stores the previous value when we specify a range 2421 * of addresses within a mask, e.g. 45-63. i = -1 means we 2422 * have no previous value. 2423 */ 2424 i = -1; /* previous value in a range */ 2425 while (isdigit(*av)) { 2426 char *s; 2427 int a = strtol(av, &s, 0); 2428 2429 if (s == av) { /* no parameter */ 2430 if (*av != '}') 2431 errx(EX_DATAERR, "set not closed\n"); 2432 if (i != -1) 2433 errx(EX_DATAERR, "incomplete range %d-", i); 2434 break; 2435 } 2436 if (a < low || a > high) 2437 errx(EX_DATAERR, "addr %d out of range [%d-%d]\n", 2438 a, low, high); 2439 a -= low; 2440 if (i == -1) /* no previous in range */ 2441 i = a; 2442 else { /* check that range is valid */ 2443 if (i > a) 2444 errx(EX_DATAERR, "invalid range %d-%d", 2445 i+low, a+low); 2446 if (*s == '-') 2447 errx(EX_DATAERR, "double '-' in range"); 2448 } 2449 for (; i <= a; i++) 2450 map[i/32] |= 1<<(i & 31); 2451 i = -1; 2452 if (*s == '-') 2453 i = a; 2454 else if (*s == '}') 2455 break; 2456 av = s+1; 2457 } 2458 return; 2459 } 2460 av = p; 2461 if (av) /* then *av must be a ',' */ 2462 av++; 2463 2464 /* Check this entry */ 2465 if (d[1] == 0) { /* "any", specified as x.x.x.x/0 */ 2466 /* 2467 * 'any' turns the entire list into a NOP. 2468 * 'not any' never matches, so it is removed from the 2469 * list unless it is the only item, in which case we 2470 * report an error. 2471 */ 2472 if (cmd->o.len & F_NOT) { /* "not any" never matches */ 2473 if (av == NULL && len == 0) /* only this entry */ 2474 errx(EX_DATAERR, "not any never matches"); 2475 } 2476 /* else do nothing and skip this entry */ 2477 return; 2478 } 2479 /* A single IP can be stored in an optimized format */ 2480 if (d[1] == ~0 && av == NULL && len == 0) { 2481 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32); 2482 return; 2483 } 2484 len += 2; /* two words... */ 2485 d += 2; 2486 } /* end while */ 2487 if (len + 1 > F_LEN_MASK) 2488 errx(EX_DATAERR, "address list too long"); 2489 cmd->o.len |= len+1; 2490} 2491 2492 2493/* Try to find ipv6 address by hostname */ 2494static int 2495lookup_host6 (char *host, struct in6_addr *ip6addr) 2496{ 2497 struct hostent *he; 2498 2499 if (!inet_pton(AF_INET6, host, ip6addr)) { 2500 if ((he = gethostbyname2(host, AF_INET6)) == NULL) 2501 return(-1); 2502 memcpy(ip6addr, he->h_addr_list[0], sizeof( struct in6_addr)); 2503 } 2504 return(0); 2505} 2506 2507 2508/* n2mask sets n bits of the mask */ 2509void 2510n2mask(struct in6_addr *mask, int n) 2511{ 2512 static int minimask[9] = 2513 { 0x00, 0x80, 0xc0, 0xe0, 0xf0, 0xf8, 0xfc, 0xfe, 0xff }; 2514 u_char *p; 2515 2516 memset(mask, 0, sizeof(struct in6_addr)); 2517 p = (u_char *) mask; 2518 for (; n > 0; p++, n -= 8) { 2519 if (n >= 8) 2520 *p = 0xff; 2521 else 2522 *p = minimask[n]; 2523 } 2524 return; 2525} 2526 2527 2528/* 2529 * fill the addr and mask fields in the instruction as appropriate from av. 2530 * Update length as appropriate. 2531 * The following formats are allowed: 2532 * any matches any IP6. Actually returns an empty instruction. 2533 * me returns O_IP6_*_ME 2534 * 2535 * 03f1::234:123:0342 single IP6 addres 2536 * 03f1::234:123:0342/24 address/mask 2537 * 03f1::234:123:0342/24,03f1::234:123:0343/ List of address 2538 * 2539 * Set of address (as in ipv6) not supported because ipv6 address 2540 * are typically random past the initial prefix. 2541 * Return 1 on success, 0 on failure. 2542 */ 2543static int 2544fill_ip6(ipfw_insn_ip6 *cmd, char *av) 2545{ 2546 int len = 0; 2547 struct in6_addr *d = &(cmd->addr6); 2548 /* 2549 * Needed for multiple address. 2550 * Note d[1] points to struct in6_add r mask6 of cmd 2551 */ 2552 2553 cmd->o.len &= ~F_LEN_MASK; /* zero len */ 2554 2555 if (strcmp(av, "any") == 0) 2556 return (1); 2557 2558 2559 if (strcmp(av, "me") == 0) { /* Set the data for "me" opt*/ 2560 cmd->o.len |= F_INSN_SIZE(ipfw_insn); 2561 return (1); 2562 } 2563 2564 if (strcmp(av, "me6") == 0) { /* Set the data for "me" opt*/ 2565 cmd->o.len |= F_INSN_SIZE(ipfw_insn); 2566 return (1); 2567 } 2568 2569 av = strdup(av); 2570 while (av) { 2571 /* 2572 * After the address we can have '/' indicating a mask, 2573 * or ',' indicating another address follows. 2574 */ 2575 2576 char *p; 2577 int masklen; 2578 char md = '\0'; 2579 2580 if ((p = strpbrk(av, "/,")) ) { 2581 md = *p; /* save the separator */ 2582 *p = '\0'; /* terminate address string */ 2583 p++; /* and skip past it */ 2584 } 2585 /* now p points to NULL, mask or next entry */ 2586 2587 /* lookup stores address in *d as a side effect */ 2588 if (lookup_host6(av, d) != 0) { 2589 /* XXX: failed. Free memory and go */ 2590 errx(EX_DATAERR, "bad address \"%s\"", av); 2591 } 2592 /* next, look at the mask, if any */ 2593 masklen = (md == '/') ? atoi(p) : 128; 2594 if (masklen > 128 || masklen < 0) 2595 errx(EX_DATAERR, "bad width \"%s\''", p); 2596 else 2597 n2mask(&d[1], masklen); 2598 2599 APPLY_MASK(d, &d[1]) /* mask base address with mask */ 2600 2601 /* find next separator */ 2602 2603 if (md == '/') { /* find separator past the mask */ 2604 p = strpbrk(p, ","); 2605 if (p != NULL) 2606 p++; 2607 } 2608 av = p; 2609 2610 /* Check this entry */ 2611 if (masklen == 0) { 2612 /* 2613 * 'any' turns the entire list into a NOP. 2614 * 'not any' never matches, so it is removed from the 2615 * list unless it is the only item, in which case we 2616 * report an error. 2617 */ 2618 if (cmd->o.len & F_NOT && av == NULL && len == 0) 2619 errx(EX_DATAERR, "not any never matches"); 2620 continue; 2621 } 2622 2623 /* 2624 * A single IP can be stored alone 2625 */ 2626 if (masklen == 128 && av == NULL && len == 0) { 2627 len = F_INSN_SIZE(struct in6_addr); 2628 break; 2629 } 2630 2631 /* Update length and pointer to arguments */ 2632 len += F_INSN_SIZE(struct in6_addr)*2; 2633 d += 2; 2634 } /* end while */ 2635 2636 /* 2637 * Total length of the command, remember that 1 is the size of 2638 * the base command. 2639 */ 2640 if (len + 1 > F_LEN_MASK) 2641 errx(EX_DATAERR, "address list too long"); 2642 cmd->o.len |= len+1; 2643 free(av); 2644 return (1); 2645} 2646 2647/* 2648 * fills command for ipv6 flow-id filtering 2649 * note that the 20 bit flow number is stored in a array of u_int32_t 2650 * it's supported lists of flow-id, so in the o.arg1 we store how many 2651 * additional flow-id we want to filter, the basic is 1 2652 */ 2653static void 2654fill_flow6( ipfw_insn_u32 *cmd, char *av ) 2655{ 2656 u_int32_t type; /* Current flow number */ 2657 u_int16_t nflow = 0; /* Current flow index */ 2658 char *s = av; 2659 cmd->d[0] = 0; /* Initializing the base number*/ 2660 2661 while (s) { 2662 av = strsep( &s, ",") ; 2663 type = strtoul(av, &av, 0); 2664 if (*av != ',' && *av != '\0') 2665 errx(EX_DATAERR, "invalid ipv6 flow number %s", av); 2666 if (type > 0xfffff) 2667 errx(EX_DATAERR, "flow number out of range %s", av); 2668 cmd->d[nflow] |= type; 2669 nflow++; 2670 } 2671 if( nflow > 0 ) { 2672 cmd->o.opcode = O_FLOW6ID; 2673 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32) + nflow; 2674 cmd->o.arg1 = nflow; 2675 } 2676 else { 2677 errx(EX_DATAERR, "invalid ipv6 flow number %s", av); 2678 } 2679} 2680 2681static ipfw_insn * 2682add_srcip6(ipfw_insn *cmd, char *av) 2683{ 2684 2685 fill_ip6((ipfw_insn_ip6 *)cmd, av); 2686 if (F_LEN(cmd) == 0) { /* any */ 2687 } else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn)) { /* "me" */ 2688 cmd->opcode = O_IP6_SRC_ME; 2689 } else if (F_LEN(cmd) == 2690 (F_INSN_SIZE(struct in6_addr) + F_INSN_SIZE(ipfw_insn))) { 2691 /* single IP, no mask*/ 2692 cmd->opcode = O_IP6_SRC; 2693 } else { /* addr/mask opt */ 2694 cmd->opcode = O_IP6_SRC_MASK; 2695 } 2696 return cmd; 2697} 2698 2699static ipfw_insn * 2700add_dstip6(ipfw_insn *cmd, char *av) 2701{ 2702 2703 fill_ip6((ipfw_insn_ip6 *)cmd, av); 2704 if (F_LEN(cmd) == 0) { /* any */ 2705 } else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn)) { /* "me" */ 2706 cmd->opcode = O_IP6_DST_ME; 2707 } else if (F_LEN(cmd) == 2708 (F_INSN_SIZE(struct in6_addr) + F_INSN_SIZE(ipfw_insn))) { 2709 /* single IP, no mask*/ 2710 cmd->opcode = O_IP6_DST; 2711 } else { /* addr/mask opt */ 2712 cmd->opcode = O_IP6_DST_MASK; 2713 } 2714 return cmd; 2715} 2716 2717 2718/* 2719 * helper function to process a set of flags and set bits in the 2720 * appropriate masks. 2721 */ 2722static void 2723fill_flags(ipfw_insn *cmd, enum ipfw_opcodes opcode, 2724 struct _s_x *flags, char *p) 2725{ 2726 uint8_t set=0, clear=0; 2727 2728 while (p && *p) { 2729 char *q; /* points to the separator */ 2730 int val; 2731 uint8_t *which; /* mask we are working on */ 2732 2733 if (*p == '!') { 2734 p++; 2735 which = &clear; 2736 } else 2737 which = &set; 2738 q = strchr(p, ','); 2739 if (q) 2740 *q++ = '\0'; 2741 val = match_token(flags, p); 2742 if (val <= 0) 2743 errx(EX_DATAERR, "invalid flag %s", p); 2744 *which |= (uint8_t)val; 2745 p = q; 2746 } 2747 cmd->opcode = opcode; 2748 cmd->len = (cmd->len & (F_NOT | F_OR)) | 1; 2749 cmd->arg1 = (set & 0xff) | ( (clear & 0xff) << 8); 2750} 2751 2752 2753void 2754ipfw_delete(int ac, char *av[]) 2755{ 2756 uint32_t rulenum; 2757 int i; 2758 int exitval = EX_OK; 2759 int do_set = 0; 2760 2761 2762 av++; ac--; 2763 NEED1("missing rule specification"); 2764 if (ac > 0 && _substrcmp(*av, "set") == 0) { 2765 /* Do not allow using the following syntax: 2766 * ipfw set N delete set M 2767 */ 2768 if (co.use_set) 2769 errx(EX_DATAERR, "invalid syntax"); 2770 do_set = 1; /* delete set */ 2771 ac--; av++; 2772 } 2773 2774 /* Rule number */ 2775 while (ac && isdigit(**av)) { 2776 i = atoi(*av); av++; ac--; 2777 if (co.do_nat) { 2778 exitval = do_cmd(IP_FW_NAT_DEL, &i, sizeof i); 2779 if (exitval) { 2780 exitval = EX_UNAVAILABLE; 2781 warn("rule %u not available", i); 2782 } 2783 } else if (co.do_pipe) { 2784 exitval = ipfw_delete_pipe(co.do_pipe, i); 2785 } else { 2786 if (co.use_set) 2787 rulenum = (i & 0xffff) | (5 << 24) | 2788 ((co.use_set - 1) << 16); 2789 else 2790 rulenum = (i & 0xffff) | (do_set << 24); 2791 i = do_cmd(IP_FW_DEL, &rulenum, sizeof rulenum); 2792 if (i) { 2793 exitval = EX_UNAVAILABLE; 2794 warn("rule %u: setsockopt(IP_FW_DEL)", 2795 rulenum); 2796 } 2797 } 2798 } 2799 if (exitval != EX_OK) 2800 exit(exitval); 2801} 2802 2803 2804/* 2805 * fill the interface structure. We do not check the name as we can 2806 * create interfaces dynamically, so checking them at insert time 2807 * makes relatively little sense. 2808 * Interface names containing '*', '?', or '[' are assumed to be shell 2809 * patterns which match interfaces. 2810 */ 2811static void 2812fill_iface(ipfw_insn_if *cmd, char *arg) 2813{ 2814 cmd->name[0] = '\0'; 2815 cmd->o.len |= F_INSN_SIZE(ipfw_insn_if); 2816 2817 /* Parse the interface or address */ 2818 if (strcmp(arg, "any") == 0) 2819 cmd->o.len = 0; /* effectively ignore this command */ 2820 else if (!isdigit(*arg)) { 2821 strlcpy(cmd->name, arg, sizeof(cmd->name)); 2822 cmd->p.glob = strpbrk(arg, "*?[") != NULL ? 1 : 0; 2823 } else if (!inet_aton(arg, &cmd->p.ip)) 2824 errx(EX_DATAERR, "bad ip address ``%s''", arg); 2825} 2826 2827/* 2828 * Search for interface with name "ifn", and fill n accordingly: 2829 * 2830 * n->ip ip address of interface "ifn" 2831 * n->if_name copy of interface name "ifn" 2832 */ 2833static void 2834set_addr_dynamic(const char *ifn, struct cfg_nat *n) 2835{ 2836 size_t needed; 2837 int mib[6]; 2838 char *buf, *lim, *next; 2839 struct if_msghdr *ifm; 2840 struct ifa_msghdr *ifam; 2841 struct sockaddr_dl *sdl; 2842 struct sockaddr_in *sin; 2843 int ifIndex, ifMTU; 2844 2845 mib[0] = CTL_NET; 2846 mib[1] = PF_ROUTE; 2847 mib[2] = 0; 2848 mib[3] = AF_INET; 2849 mib[4] = NET_RT_IFLIST; 2850 mib[5] = 0; 2851/* 2852 * Get interface data. 2853 */ 2854 if (sysctl(mib, 6, NULL, &needed, NULL, 0) == -1) 2855 err(1, "iflist-sysctl-estimate"); 2856 buf = safe_calloc(1, needed); 2857 if (sysctl(mib, 6, buf, &needed, NULL, 0) == -1) 2858 err(1, "iflist-sysctl-get"); 2859 lim = buf + needed; 2860/* 2861 * Loop through interfaces until one with 2862 * given name is found. This is done to 2863 * find correct interface index for routing 2864 * message processing. 2865 */ 2866 ifIndex = 0; 2867 next = buf; 2868 while (next < lim) { 2869 ifm = (struct if_msghdr *)next; 2870 next += ifm->ifm_msglen; 2871 if (ifm->ifm_version != RTM_VERSION) { 2872 if (co.verbose) 2873 warnx("routing message version %d " 2874 "not understood", ifm->ifm_version); 2875 continue; 2876 } 2877 if (ifm->ifm_type == RTM_IFINFO) { 2878 sdl = (struct sockaddr_dl *)(ifm + 1); 2879 if (strlen(ifn) == sdl->sdl_nlen && 2880 strncmp(ifn, sdl->sdl_data, sdl->sdl_nlen) == 0) { 2881 ifIndex = ifm->ifm_index; 2882 ifMTU = ifm->ifm_data.ifi_mtu; 2883 break; 2884 } 2885 } 2886 } 2887 if (!ifIndex) 2888 errx(1, "unknown interface name %s", ifn); 2889/* 2890 * Get interface address. 2891 */ 2892 sin = NULL; 2893 while (next < lim) { 2894 ifam = (struct ifa_msghdr *)next; 2895 next += ifam->ifam_msglen; 2896 if (ifam->ifam_version != RTM_VERSION) { 2897 if (co.verbose) 2898 warnx("routing message version %d " 2899 "not understood", ifam->ifam_version); 2900 continue; 2901 } 2902 if (ifam->ifam_type != RTM_NEWADDR) 2903 break; 2904 if (ifam->ifam_addrs & RTA_IFA) { 2905 int i; 2906 char *cp = (char *)(ifam + 1); 2907 2908 for (i = 1; i < RTA_IFA; i <<= 1) { 2909 if (ifam->ifam_addrs & i) 2910 cp += SA_SIZE((struct sockaddr *)cp); 2911 } 2912 if (((struct sockaddr *)cp)->sa_family == AF_INET) { 2913 sin = (struct sockaddr_in *)cp; 2914 break; 2915 } 2916 } 2917 } 2918 if (sin == NULL) 2919 errx(1, "%s: cannot get interface address", ifn); 2920 2921 n->ip = sin->sin_addr; 2922 strncpy(n->if_name, ifn, IF_NAMESIZE); 2923 2924 free(buf); 2925} 2926 2927/* 2928 * XXX - The following functions, macros and definitions come from natd.c: 2929 * it would be better to move them outside natd.c, in a file 2930 * (redirect_support.[ch]?) shared by ipfw and natd, but for now i can live 2931 * with it. 2932 */ 2933 2934/* 2935 * Definition of a port range, and macros to deal with values. 2936 * FORMAT: HI 16-bits == first port in range, 0 == all ports. 2937 * LO 16-bits == number of ports in range 2938 * NOTES: - Port values are not stored in network byte order. 2939 */ 2940 2941#define port_range u_long 2942 2943#define GETLOPORT(x) ((x) >> 0x10) 2944#define GETNUMPORTS(x) ((x) & 0x0000ffff) 2945#define GETHIPORT(x) (GETLOPORT((x)) + GETNUMPORTS((x))) 2946 2947/* Set y to be the low-port value in port_range variable x. */ 2948#define SETLOPORT(x,y) ((x) = ((x) & 0x0000ffff) | ((y) << 0x10)) 2949 2950/* Set y to be the number of ports in port_range variable x. */ 2951#define SETNUMPORTS(x,y) ((x) = ((x) & 0xffff0000) | (y)) 2952 2953static void 2954StrToAddr (const char* str, struct in_addr* addr) 2955{ 2956 struct hostent* hp; 2957 2958 if (inet_aton (str, addr)) 2959 return; 2960 2961 hp = gethostbyname (str); 2962 if (!hp) 2963 errx (1, "unknown host %s", str); 2964 2965 memcpy (addr, hp->h_addr, sizeof (struct in_addr)); 2966} 2967 2968static int 2969StrToPortRange (const char* str, const char* proto, port_range *portRange) 2970{ 2971 char* sep; 2972 struct servent* sp; 2973 char* end; 2974 u_short loPort; 2975 u_short hiPort; 2976 2977 /* First see if this is a service, return corresponding port if so. */ 2978 sp = getservbyname (str,proto); 2979 if (sp) { 2980 SETLOPORT(*portRange, ntohs(sp->s_port)); 2981 SETNUMPORTS(*portRange, 1); 2982 return 0; 2983 } 2984 2985 /* Not a service, see if it's a single port or port range. */ 2986 sep = strchr (str, '-'); 2987 if (sep == NULL) { 2988 SETLOPORT(*portRange, strtol(str, &end, 10)); 2989 if (end != str) { 2990 /* Single port. */ 2991 SETNUMPORTS(*portRange, 1); 2992 return 0; 2993 } 2994 2995 /* Error in port range field. */ 2996 errx (EX_DATAERR, "%s/%s: unknown service", str, proto); 2997 } 2998 2999 /* Port range, get the values and sanity check. */ 3000 sscanf (str, "%hu-%hu", &loPort, &hiPort); 3001 SETLOPORT(*portRange, loPort); 3002 SETNUMPORTS(*portRange, 0); /* Error by default */ 3003 if (loPort <= hiPort) 3004 SETNUMPORTS(*portRange, hiPort - loPort + 1); 3005 3006 if (GETNUMPORTS(*portRange) == 0) 3007 errx (EX_DATAERR, "invalid port range %s", str); 3008 3009 return 0; 3010} 3011 3012static int 3013StrToProto (const char* str) 3014{ 3015 if (!strcmp (str, "tcp")) 3016 return IPPROTO_TCP; 3017 3018 if (!strcmp (str, "udp")) 3019 return IPPROTO_UDP; 3020 3021 errx (EX_DATAERR, "unknown protocol %s. Expected tcp or udp", str); 3022} 3023 3024static int 3025StrToAddrAndPortRange (const char* str, struct in_addr* addr, char* proto, 3026 port_range *portRange) 3027{ 3028 char* ptr; 3029 3030 ptr = strchr (str, ':'); 3031 if (!ptr) 3032 errx (EX_DATAERR, "%s is missing port number", str); 3033 3034 *ptr = '\0'; 3035 ++ptr; 3036 3037 StrToAddr (str, addr); 3038 return StrToPortRange (ptr, proto, portRange); 3039} 3040 3041/* End of stuff taken from natd.c. */ 3042 3043#define INC_ARGCV() do { \ 3044 (*_av)++; \ 3045 (*_ac)--; \ 3046 av = *_av; \ 3047 ac = *_ac; \ 3048} while(0) 3049 3050/* 3051 * The next 3 functions add support for the addr, port and proto redirect and 3052 * their logic is loosely based on SetupAddressRedirect(), SetupPortRedirect() 3053 * and SetupProtoRedirect() from natd.c. 3054 * 3055 * Every setup_* function fills at least one redirect entry 3056 * (struct cfg_redir) and zero or more server pool entry (struct cfg_spool) 3057 * in buf. 3058 * 3059 * The format of data in buf is: 3060 * 3061 * 3062 * cfg_nat cfg_redir cfg_spool ...... cfg_spool 3063 * 3064 * ------------------------------------- ------------ 3065 * | | .....X ... | | | | ..... 3066 * ------------------------------------- ...... ------------ 3067 * ^ 3068 * spool_cnt n=0 ...... n=(X-1) 3069 * 3070 * len points to the amount of available space in buf 3071 * space counts the memory consumed by every function 3072 * 3073 * XXX - Every function get all the argv params so it 3074 * has to check, in optional parameters, that the next 3075 * args is a valid option for the redir entry and not 3076 * another token. Only redir_port and redir_proto are 3077 * affected by this. 3078 */ 3079 3080static int 3081setup_redir_addr(char *spool_buf, int len, 3082 int *_ac, char ***_av) 3083{ 3084 char **av, *sep; /* Token separator. */ 3085 /* Temporary buffer used to hold server pool ip's. */ 3086 char tmp_spool_buf[NAT_BUF_LEN]; 3087 int ac, space, lsnat; 3088 struct cfg_redir *r; 3089 struct cfg_spool *tmp; 3090 3091 av = *_av; 3092 ac = *_ac; 3093 space = 0; 3094 lsnat = 0; 3095 if (len >= SOF_REDIR) { 3096 r = (struct cfg_redir *)spool_buf; 3097 /* Skip cfg_redir at beginning of buf. */ 3098 spool_buf = &spool_buf[SOF_REDIR]; 3099 space = SOF_REDIR; 3100 len -= SOF_REDIR; 3101 } else 3102 goto nospace; 3103 r->mode = REDIR_ADDR; 3104 /* Extract local address. */ 3105 if (ac == 0) 3106 errx(EX_DATAERR, "redirect_addr: missing local address"); 3107 sep = strchr(*av, ','); 3108 if (sep) { /* LSNAT redirection syntax. */ 3109 r->laddr.s_addr = INADDR_NONE; 3110 /* Preserve av, copy spool servers to tmp_spool_buf. */ 3111 strncpy(tmp_spool_buf, *av, strlen(*av)+1); 3112 lsnat = 1; 3113 } else 3114 StrToAddr(*av, &r->laddr); 3115 INC_ARGCV(); 3116 3117 /* Extract public address. */ 3118 if (ac == 0) 3119 errx(EX_DATAERR, "redirect_addr: missing public address"); 3120 StrToAddr(*av, &r->paddr); 3121 INC_ARGCV(); 3122 3123 /* Setup LSNAT server pool. */ 3124 if (sep) { 3125 sep = strtok(tmp_spool_buf, ","); 3126 while (sep != NULL) { 3127 tmp = (struct cfg_spool *)spool_buf; 3128 if (len < SOF_SPOOL) 3129 goto nospace; 3130 len -= SOF_SPOOL; 3131 space += SOF_SPOOL; 3132 StrToAddr(sep, &tmp->addr); 3133 tmp->port = ~0; 3134 r->spool_cnt++; 3135 /* Point to the next possible cfg_spool. */ 3136 spool_buf = &spool_buf[SOF_SPOOL]; 3137 sep = strtok(NULL, ","); 3138 } 3139 } 3140 return(space); 3141nospace: 3142 errx(EX_DATAERR, "redirect_addr: buf is too small\n"); 3143} 3144 3145static int 3146setup_redir_port(char *spool_buf, int len, 3147 int *_ac, char ***_av) 3148{ 3149 char **av, *sep, *protoName; 3150 char tmp_spool_buf[NAT_BUF_LEN]; 3151 int ac, space, lsnat; 3152 struct cfg_redir *r; 3153 struct cfg_spool *tmp; 3154 u_short numLocalPorts; 3155 port_range portRange; 3156 3157 av = *_av; 3158 ac = *_ac; 3159 space = 0; 3160 lsnat = 0; 3161 numLocalPorts = 0; 3162 3163 if (len >= SOF_REDIR) { 3164 r = (struct cfg_redir *)spool_buf; 3165 /* Skip cfg_redir at beginning of buf. */ 3166 spool_buf = &spool_buf[SOF_REDIR]; 3167 space = SOF_REDIR; 3168 len -= SOF_REDIR; 3169 } else 3170 goto nospace; 3171 r->mode = REDIR_PORT; 3172 /* 3173 * Extract protocol. 3174 */ 3175 if (ac == 0) 3176 errx (EX_DATAERR, "redirect_port: missing protocol"); 3177 r->proto = StrToProto(*av); 3178 protoName = *av; 3179 INC_ARGCV(); 3180 3181 /* 3182 * Extract local address. 3183 */ 3184 if (ac == 0) 3185 errx (EX_DATAERR, "redirect_port: missing local address"); 3186 3187 sep = strchr(*av, ','); 3188 /* LSNAT redirection syntax. */ 3189 if (sep) { 3190 r->laddr.s_addr = INADDR_NONE; 3191 r->lport = ~0; 3192 numLocalPorts = 1; 3193 /* Preserve av, copy spool servers to tmp_spool_buf. */ 3194 strncpy(tmp_spool_buf, *av, strlen(*av)+1); 3195 lsnat = 1; 3196 } else { 3197 if (StrToAddrAndPortRange (*av, &r->laddr, protoName, 3198 &portRange) != 0) 3199 errx(EX_DATAERR, "redirect_port:" 3200 "invalid local port range"); 3201 3202 r->lport = GETLOPORT(portRange); 3203 numLocalPorts = GETNUMPORTS(portRange); 3204 } 3205 INC_ARGCV(); 3206 3207 /* 3208 * Extract public port and optionally address. 3209 */ 3210 if (ac == 0) 3211 errx (EX_DATAERR, "redirect_port: missing public port"); 3212 3213 sep = strchr (*av, ':'); 3214 if (sep) { 3215 if (StrToAddrAndPortRange (*av, &r->paddr, protoName, 3216 &portRange) != 0) 3217 errx(EX_DATAERR, "redirect_port:" 3218 "invalid public port range"); 3219 } else { 3220 r->paddr.s_addr = INADDR_ANY; 3221 if (StrToPortRange (*av, protoName, &portRange) != 0) 3222 errx(EX_DATAERR, "redirect_port:" 3223 "invalid public port range"); 3224 } 3225 3226 r->pport = GETLOPORT(portRange); 3227 r->pport_cnt = GETNUMPORTS(portRange); 3228 INC_ARGCV(); 3229 3230 /* 3231 * Extract remote address and optionally port. 3232 */ 3233 /* 3234 * NB: isalpha(**av) => we've to check that next parameter is really an 3235 * option for this redirect entry, else stop here processing arg[cv]. 3236 */ 3237 if (ac != 0 && !isalpha(**av)) { 3238 sep = strchr (*av, ':'); 3239 if (sep) { 3240 if (StrToAddrAndPortRange (*av, &r->raddr, protoName, 3241 &portRange) != 0) 3242 errx(EX_DATAERR, "redirect_port:" 3243 "invalid remote port range"); 3244 } else { 3245 SETLOPORT(portRange, 0); 3246 SETNUMPORTS(portRange, 1); 3247 StrToAddr (*av, &r->raddr); 3248 } 3249 INC_ARGCV(); 3250 } else { 3251 SETLOPORT(portRange, 0); 3252 SETNUMPORTS(portRange, 1); 3253 r->raddr.s_addr = INADDR_ANY; 3254 } 3255 r->rport = GETLOPORT(portRange); 3256 r->rport_cnt = GETNUMPORTS(portRange); 3257 3258 /* 3259 * Make sure port ranges match up, then add the redirect ports. 3260 */ 3261 if (numLocalPorts != r->pport_cnt) 3262 errx(EX_DATAERR, "redirect_port:" 3263 "port ranges must be equal in size"); 3264 3265 /* Remote port range is allowed to be '0' which means all ports. */ 3266 if (r->rport_cnt != numLocalPorts && 3267 (r->rport_cnt != 1 || r->rport != 0)) 3268 errx(EX_DATAERR, "redirect_port: remote port must" 3269 "be 0 or equal to local port range in size"); 3270 3271 /* 3272 * Setup LSNAT server pool. 3273 */ 3274 if (lsnat) { 3275 sep = strtok(tmp_spool_buf, ","); 3276 while (sep != NULL) { 3277 tmp = (struct cfg_spool *)spool_buf; 3278 if (len < SOF_SPOOL) 3279 goto nospace; 3280 len -= SOF_SPOOL; 3281 space += SOF_SPOOL; 3282 if (StrToAddrAndPortRange(sep, &tmp->addr, protoName, 3283 &portRange) != 0) 3284 errx(EX_DATAERR, "redirect_port:" 3285 "invalid local port range"); 3286 if (GETNUMPORTS(portRange) != 1) 3287 errx(EX_DATAERR, "redirect_port: local port" 3288 "must be single in this context"); 3289 tmp->port = GETLOPORT(portRange); 3290 r->spool_cnt++; 3291 /* Point to the next possible cfg_spool. */ 3292 spool_buf = &spool_buf[SOF_SPOOL]; 3293 sep = strtok(NULL, ","); 3294 } 3295 } 3296 return (space); 3297nospace: 3298 errx(EX_DATAERR, "redirect_port: buf is too small\n"); 3299} 3300 3301static int 3302setup_redir_proto(char *spool_buf, int len, 3303 int *_ac, char ***_av) 3304{ 3305 char **av; 3306 int ac, space; 3307 struct protoent *protoent; 3308 struct cfg_redir *r; 3309 3310 av = *_av; 3311 ac = *_ac; 3312 if (len >= SOF_REDIR) { 3313 r = (struct cfg_redir *)spool_buf; 3314 /* Skip cfg_redir at beginning of buf. */ 3315 spool_buf = &spool_buf[SOF_REDIR]; 3316 space = SOF_REDIR; 3317 len -= SOF_REDIR; 3318 } else 3319 goto nospace; 3320 r->mode = REDIR_PROTO; 3321 /* 3322 * Extract protocol. 3323 */ 3324 if (ac == 0) 3325 errx(EX_DATAERR, "redirect_proto: missing protocol"); 3326 3327 protoent = getprotobyname(*av); 3328 if (protoent == NULL) 3329 errx(EX_DATAERR, "redirect_proto: unknown protocol %s", *av); 3330 else 3331 r->proto = protoent->p_proto; 3332 3333 INC_ARGCV(); 3334 3335 /* 3336 * Extract local address. 3337 */ 3338 if (ac == 0) 3339 errx(EX_DATAERR, "redirect_proto: missing local address"); 3340 else 3341 StrToAddr(*av, &r->laddr); 3342 3343 INC_ARGCV(); 3344 3345 /* 3346 * Extract optional public address. 3347 */ 3348 if (ac == 0) { 3349 r->paddr.s_addr = INADDR_ANY; 3350 r->raddr.s_addr = INADDR_ANY; 3351 } else { 3352 /* see above in setup_redir_port() */ 3353 if (!isalpha(**av)) { 3354 StrToAddr(*av, &r->paddr); 3355 INC_ARGCV(); 3356 3357 /* 3358 * Extract optional remote address. 3359 */ 3360 /* see above in setup_redir_port() */ 3361 if (ac!=0 && !isalpha(**av)) { 3362 StrToAddr(*av, &r->raddr); 3363 INC_ARGCV(); 3364 } 3365 } 3366 } 3367 return (space); 3368nospace: 3369 errx(EX_DATAERR, "redirect_proto: buf is too small\n"); 3370} 3371 3372static void 3373print_nat_config(unsigned char *buf) 3374{ 3375 struct cfg_nat *n; 3376 int i, cnt, flag, off; 3377 struct cfg_redir *t; 3378 struct cfg_spool *s; 3379 struct protoent *p; 3380 3381 n = (struct cfg_nat *)buf; 3382 flag = 1; 3383 off = sizeof(*n); 3384 printf("ipfw nat %u config", n->id); 3385 if (strlen(n->if_name) != 0) 3386 printf(" if %s", n->if_name); 3387 else if (n->ip.s_addr != 0) 3388 printf(" ip %s", inet_ntoa(n->ip)); 3389 while (n->mode != 0) { 3390 if (n->mode & PKT_ALIAS_LOG) { 3391 printf(" log"); 3392 n->mode &= ~PKT_ALIAS_LOG; 3393 } else if (n->mode & PKT_ALIAS_DENY_INCOMING) { 3394 printf(" deny_in"); 3395 n->mode &= ~PKT_ALIAS_DENY_INCOMING; 3396 } else if (n->mode & PKT_ALIAS_SAME_PORTS) { 3397 printf(" same_ports"); 3398 n->mode &= ~PKT_ALIAS_SAME_PORTS; 3399 } else if (n->mode & PKT_ALIAS_UNREGISTERED_ONLY) { 3400 printf(" unreg_only"); 3401 n->mode &= ~PKT_ALIAS_UNREGISTERED_ONLY; 3402 } else if (n->mode & PKT_ALIAS_RESET_ON_ADDR_CHANGE) { 3403 printf(" reset"); 3404 n->mode &= ~PKT_ALIAS_RESET_ON_ADDR_CHANGE; 3405 } else if (n->mode & PKT_ALIAS_REVERSE) { 3406 printf(" reverse"); 3407 n->mode &= ~PKT_ALIAS_REVERSE; 3408 } else if (n->mode & PKT_ALIAS_PROXY_ONLY) { 3409 printf(" proxy_only"); 3410 n->mode &= ~PKT_ALIAS_PROXY_ONLY; 3411 } 3412 } 3413 /* Print all the redirect's data configuration. */ 3414 for (cnt = 0; cnt < n->redir_cnt; cnt++) { 3415 t = (struct cfg_redir *)&buf[off]; 3416 off += SOF_REDIR; 3417 switch (t->mode) { 3418 case REDIR_ADDR: 3419 printf(" redirect_addr"); 3420 if (t->spool_cnt == 0) 3421 printf(" %s", inet_ntoa(t->laddr)); 3422 else 3423 for (i = 0; i < t->spool_cnt; i++) { 3424 s = (struct cfg_spool *)&buf[off]; 3425 if (i) 3426 printf(","); 3427 else 3428 printf(" "); 3429 printf("%s", inet_ntoa(s->addr)); 3430 off += SOF_SPOOL; 3431 } 3432 printf(" %s", inet_ntoa(t->paddr)); 3433 break; 3434 case REDIR_PORT: 3435 p = getprotobynumber(t->proto); 3436 printf(" redirect_port %s ", p->p_name); 3437 if (!t->spool_cnt) { 3438 printf("%s:%u", inet_ntoa(t->laddr), t->lport); 3439 if (t->pport_cnt > 1) 3440 printf("-%u", t->lport + 3441 t->pport_cnt - 1); 3442 } else 3443 for (i=0; i < t->spool_cnt; i++) { 3444 s = (struct cfg_spool *)&buf[off]; 3445 if (i) 3446 printf(","); 3447 printf("%s:%u", inet_ntoa(s->addr), 3448 s->port); 3449 off += SOF_SPOOL; 3450 } 3451 3452 printf(" "); 3453 if (t->paddr.s_addr) 3454 printf("%s:", inet_ntoa(t->paddr)); 3455 printf("%u", t->pport); 3456 if (!t->spool_cnt && t->pport_cnt > 1) 3457 printf("-%u", t->pport + t->pport_cnt - 1); 3458 3459 if (t->raddr.s_addr) { 3460 printf(" %s", inet_ntoa(t->raddr)); 3461 if (t->rport) { 3462 printf(":%u", t->rport); 3463 if (!t->spool_cnt && t->rport_cnt > 1) 3464 printf("-%u", t->rport + 3465 t->rport_cnt - 1); 3466 } 3467 } 3468 break; 3469 case REDIR_PROTO: 3470 p = getprotobynumber(t->proto); 3471 printf(" redirect_proto %s %s", p->p_name, 3472 inet_ntoa(t->laddr)); 3473 if (t->paddr.s_addr != 0) { 3474 printf(" %s", inet_ntoa(t->paddr)); 3475 if (t->raddr.s_addr) 3476 printf(" %s", inet_ntoa(t->raddr)); 3477 } 3478 break; 3479 default: 3480 errx(EX_DATAERR, "unknown redir mode"); 3481 break; 3482 } 3483 } 3484 printf("\n"); 3485} 3486 3487void 3488ipfw_config_nat(int ac, char **av) 3489{ 3490 struct cfg_nat *n; /* Nat instance configuration. */ 3491 int i, len, off, tok; 3492 char *id, buf[NAT_BUF_LEN]; /* Buffer for serialized data. */ 3493 3494 len = NAT_BUF_LEN; 3495 /* Offset in buf: save space for n at the beginning. */ 3496 off = sizeof(*n); 3497 memset(buf, 0, sizeof(buf)); 3498 n = (struct cfg_nat *)buf; 3499 3500 av++; ac--; 3501 /* Nat id. */ 3502 if (ac && isdigit(**av)) { 3503 id = *av; 3504 i = atoi(*av); 3505 ac--; av++; 3506 n->id = i; 3507 } else 3508 errx(EX_DATAERR, "missing nat id"); 3509 if (ac == 0) 3510 errx(EX_DATAERR, "missing option"); 3511 3512 while (ac > 0) { 3513 tok = match_token(nat_params, *av); 3514 ac--; av++; 3515 switch (tok) { 3516 case TOK_IP: 3517 if (ac == 0) 3518 errx(EX_DATAERR, "missing option"); 3519 if (!inet_aton(av[0], &(n->ip))) 3520 errx(EX_DATAERR, "bad ip address ``%s''", 3521 av[0]); 3522 ac--; av++; 3523 break; 3524 case TOK_IF: 3525 if (ac == 0) 3526 errx(EX_DATAERR, "missing option"); 3527 set_addr_dynamic(av[0], n); 3528 ac--; av++; 3529 break; 3530 case TOK_ALOG: 3531 n->mode |= PKT_ALIAS_LOG; 3532 break; 3533 case TOK_DENY_INC: 3534 n->mode |= PKT_ALIAS_DENY_INCOMING; 3535 break; 3536 case TOK_SAME_PORTS: 3537 n->mode |= PKT_ALIAS_SAME_PORTS; 3538 break; 3539 case TOK_UNREG_ONLY: 3540 n->mode |= PKT_ALIAS_UNREGISTERED_ONLY; 3541 break; 3542 case TOK_RESET_ADDR: 3543 n->mode |= PKT_ALIAS_RESET_ON_ADDR_CHANGE; 3544 break; 3545 case TOK_ALIAS_REV: 3546 n->mode |= PKT_ALIAS_REVERSE; 3547 break; 3548 case TOK_PROXY_ONLY: 3549 n->mode |= PKT_ALIAS_PROXY_ONLY; 3550 break; 3551 /* 3552 * All the setup_redir_* functions work directly in the final 3553 * buffer, see above for details. 3554 */ 3555 case TOK_REDIR_ADDR: 3556 case TOK_REDIR_PORT: 3557 case TOK_REDIR_PROTO: 3558 switch (tok) { 3559 case TOK_REDIR_ADDR: 3560 i = setup_redir_addr(&buf[off], len, &ac, &av); 3561 break; 3562 case TOK_REDIR_PORT: 3563 i = setup_redir_port(&buf[off], len, &ac, &av); 3564 break; 3565 case TOK_REDIR_PROTO: 3566 i = setup_redir_proto(&buf[off], len, &ac, &av); 3567 break; 3568 } 3569 n->redir_cnt++; 3570 off += i; 3571 len -= i; 3572 break; 3573 default: 3574 errx(EX_DATAERR, "unrecognised option ``%s''", av[-1]); 3575 } 3576 } 3577 3578 i = do_cmd(IP_FW_NAT_CFG, buf, off); 3579 if (i) 3580 err(1, "setsockopt(%s)", "IP_FW_NAT_CFG"); 3581 3582 if (!co.do_quiet) { 3583 /* After every modification, we show the resultant rule. */ 3584 int _ac = 3; 3585 char *_av[] = {"show", "config", id}; 3586 ipfw_show_nat(_ac, _av); 3587 } 3588} 3589 3590static void 3591get_mac_addr_mask(const char *p, uint8_t *addr, uint8_t *mask) 3592{ 3593 int i, l; 3594 char *ap, *ptr, *optr; 3595 struct ether_addr *mac; 3596 const char *macset = "0123456789abcdefABCDEF:"; 3597 3598 if (strcmp(p, "any") == 0) { 3599 for (i = 0; i < ETHER_ADDR_LEN; i++) 3600 addr[i] = mask[i] = 0; 3601 return; 3602 } 3603 3604 optr = ptr = strdup(p); 3605 if ((ap = strsep(&ptr, "&/")) != NULL && *ap != 0) { 3606 l = strlen(ap); 3607 if (strspn(ap, macset) != l || (mac = ether_aton(ap)) == NULL) 3608 errx(EX_DATAERR, "Incorrect MAC address"); 3609 bcopy(mac, addr, ETHER_ADDR_LEN); 3610 } else 3611 errx(EX_DATAERR, "Incorrect MAC address"); 3612 3613 if (ptr != NULL) { /* we have mask? */ 3614 if (p[ptr - optr - 1] == '/') { /* mask len */ 3615 l = strtol(ptr, &ap, 10); 3616 if (*ap != 0 || l > ETHER_ADDR_LEN * 8 || l < 0) 3617 errx(EX_DATAERR, "Incorrect mask length"); 3618 for (i = 0; l > 0 && i < ETHER_ADDR_LEN; l -= 8, i++) 3619 mask[i] = (l >= 8) ? 0xff: (~0) << (8 - l); 3620 } else { /* mask */ 3621 l = strlen(ptr); 3622 if (strspn(ptr, macset) != l || 3623 (mac = ether_aton(ptr)) == NULL) 3624 errx(EX_DATAERR, "Incorrect mask"); 3625 bcopy(mac, mask, ETHER_ADDR_LEN); 3626 } 3627 } else { /* default mask: ff:ff:ff:ff:ff:ff */ 3628 for (i = 0; i < ETHER_ADDR_LEN; i++) 3629 mask[i] = 0xff; 3630 } 3631 for (i = 0; i < ETHER_ADDR_LEN; i++) 3632 addr[i] &= mask[i]; 3633 3634 free(optr); 3635} 3636 3637/* 3638 * helper function, updates the pointer to cmd with the length 3639 * of the current command, and also cleans up the first word of 3640 * the new command in case it has been clobbered before. 3641 */ 3642static ipfw_insn * 3643next_cmd(ipfw_insn *cmd) 3644{ 3645 cmd += F_LEN(cmd); 3646 bzero(cmd, sizeof(*cmd)); 3647 return cmd; 3648} 3649 3650/* 3651 * Takes arguments and copies them into a comment 3652 */ 3653static void 3654fill_comment(ipfw_insn *cmd, int ac, char **av) 3655{ 3656 int i, l; 3657 char *p = (char *)(cmd + 1); 3658 3659 cmd->opcode = O_NOP; 3660 cmd->len = (cmd->len & (F_NOT | F_OR)); 3661 3662 /* Compute length of comment string. */ 3663 for (i = 0, l = 0; i < ac; i++) 3664 l += strlen(av[i]) + 1; 3665 if (l == 0) 3666 return; 3667 if (l > 84) 3668 errx(EX_DATAERR, 3669 "comment too long (max 80 chars)"); 3670 l = 1 + (l+3)/4; 3671 cmd->len = (cmd->len & (F_NOT | F_OR)) | l; 3672 for (i = 0; i < ac; i++) { 3673 strcpy(p, av[i]); 3674 p += strlen(av[i]); 3675 *p++ = ' '; 3676 } 3677 *(--p) = '\0'; 3678} 3679 3680/* 3681 * A function to fill simple commands of size 1. 3682 * Existing flags are preserved. 3683 */ 3684static void 3685fill_cmd(ipfw_insn *cmd, enum ipfw_opcodes opcode, int flags, uint16_t arg) 3686{ 3687 cmd->opcode = opcode; 3688 cmd->len = ((cmd->len | flags) & (F_NOT | F_OR)) | 1; 3689 cmd->arg1 = arg; 3690} 3691 3692/* 3693 * Fetch and add the MAC address and type, with masks. This generates one or 3694 * two microinstructions, and returns the pointer to the last one. 3695 */ 3696static ipfw_insn * 3697add_mac(ipfw_insn *cmd, int ac, char *av[]) 3698{ 3699 ipfw_insn_mac *mac; 3700 3701 if (ac < 2) 3702 errx(EX_DATAERR, "MAC dst src"); 3703 3704 cmd->opcode = O_MACADDR2; 3705 cmd->len = (cmd->len & (F_NOT | F_OR)) | F_INSN_SIZE(ipfw_insn_mac); 3706 3707 mac = (ipfw_insn_mac *)cmd; 3708 get_mac_addr_mask(av[0], mac->addr, mac->mask); /* dst */ 3709 get_mac_addr_mask(av[1], &(mac->addr[ETHER_ADDR_LEN]), 3710 &(mac->mask[ETHER_ADDR_LEN])); /* src */ 3711 return cmd; 3712} 3713 3714static ipfw_insn * 3715add_mactype(ipfw_insn *cmd, int ac, char *av) 3716{ 3717 if (ac < 1) 3718 errx(EX_DATAERR, "missing MAC type"); 3719 if (strcmp(av, "any") != 0) { /* we have a non-null type */ 3720 fill_newports((ipfw_insn_u16 *)cmd, av, IPPROTO_ETHERTYPE); 3721 cmd->opcode = O_MAC_TYPE; 3722 return cmd; 3723 } else 3724 return NULL; 3725} 3726 3727static ipfw_insn * 3728add_proto0(ipfw_insn *cmd, char *av, u_char *protop) 3729{ 3730 struct protoent *pe; 3731 char *ep; 3732 int proto; 3733 3734 proto = strtol(av, &ep, 10); 3735 if (*ep != '\0' || proto <= 0) { 3736 if ((pe = getprotobyname(av)) == NULL) 3737 return NULL; 3738 proto = pe->p_proto; 3739 } 3740 3741 fill_cmd(cmd, O_PROTO, 0, proto); 3742 *protop = proto; 3743 return cmd; 3744} 3745 3746static ipfw_insn * 3747add_proto(ipfw_insn *cmd, char *av, u_char *protop) 3748{ 3749 u_char proto = IPPROTO_IP; 3750 3751 if (_substrcmp(av, "all") == 0 || strcmp(av, "ip") == 0) 3752 ; /* do not set O_IP4 nor O_IP6 */ 3753 else if (strcmp(av, "ip4") == 0) 3754 /* explicit "just IPv4" rule */ 3755 fill_cmd(cmd, O_IP4, 0, 0); 3756 else if (strcmp(av, "ip6") == 0) { 3757 /* explicit "just IPv6" rule */ 3758 proto = IPPROTO_IPV6; 3759 fill_cmd(cmd, O_IP6, 0, 0); 3760 } else 3761 return add_proto0(cmd, av, protop); 3762 3763 *protop = proto; 3764 return cmd; 3765} 3766 3767static ipfw_insn * 3768add_proto_compat(ipfw_insn *cmd, char *av, u_char *protop) 3769{ 3770 u_char proto = IPPROTO_IP; 3771 3772 if (_substrcmp(av, "all") == 0 || strcmp(av, "ip") == 0) 3773 ; /* do not set O_IP4 nor O_IP6 */ 3774 else if (strcmp(av, "ipv4") == 0 || strcmp(av, "ip4") == 0) 3775 /* explicit "just IPv4" rule */ 3776 fill_cmd(cmd, O_IP4, 0, 0); 3777 else if (strcmp(av, "ipv6") == 0 || strcmp(av, "ip6") == 0) { 3778 /* explicit "just IPv6" rule */ 3779 proto = IPPROTO_IPV6; 3780 fill_cmd(cmd, O_IP6, 0, 0); 3781 } else 3782 return add_proto0(cmd, av, protop); 3783 3784 *protop = proto; 3785 return cmd; 3786} 3787 3788static ipfw_insn * 3789add_srcip(ipfw_insn *cmd, char *av) 3790{ 3791 fill_ip((ipfw_insn_ip *)cmd, av); 3792 if (cmd->opcode == O_IP_DST_SET) /* set */ 3793 cmd->opcode = O_IP_SRC_SET; 3794 else if (cmd->opcode == O_IP_DST_LOOKUP) /* table */ 3795 cmd->opcode = O_IP_SRC_LOOKUP; 3796 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn)) /* me */ 3797 cmd->opcode = O_IP_SRC_ME; 3798 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_u32)) /* one IP */ 3799 cmd->opcode = O_IP_SRC; 3800 else /* addr/mask */ 3801 cmd->opcode = O_IP_SRC_MASK; 3802 return cmd; 3803} 3804 3805static ipfw_insn * 3806add_dstip(ipfw_insn *cmd, char *av) 3807{ 3808 fill_ip((ipfw_insn_ip *)cmd, av); 3809 if (cmd->opcode == O_IP_DST_SET) /* set */ 3810 ; 3811 else if (cmd->opcode == O_IP_DST_LOOKUP) /* table */ 3812 ; 3813 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn)) /* me */ 3814 cmd->opcode = O_IP_DST_ME; 3815 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_u32)) /* one IP */ 3816 cmd->opcode = O_IP_DST; 3817 else /* addr/mask */ 3818 cmd->opcode = O_IP_DST_MASK; 3819 return cmd; 3820} 3821 3822static ipfw_insn * 3823add_ports(ipfw_insn *cmd, char *av, u_char proto, int opcode) 3824{ 3825 if (_substrcmp(av, "any") == 0) { 3826 return NULL; 3827 } else if (fill_newports((ipfw_insn_u16 *)cmd, av, proto)) { 3828 /* XXX todo: check that we have a protocol with ports */ 3829 cmd->opcode = opcode; 3830 return cmd; 3831 } 3832 return NULL; 3833} 3834 3835static ipfw_insn * 3836add_src(ipfw_insn *cmd, char *av, u_char proto) 3837{ 3838 struct in6_addr a; 3839 char *host, *ch; 3840 ipfw_insn *ret = NULL; 3841 3842 if ((host = strdup(av)) == NULL) 3843 return NULL; 3844 if ((ch = strrchr(host, '/')) != NULL) 3845 *ch = '\0'; 3846 3847 if (proto == IPPROTO_IPV6 || strcmp(av, "me6") == 0 || 3848 inet_pton(AF_INET6, host, &a)) 3849 ret = add_srcip6(cmd, av); 3850 /* XXX: should check for IPv4, not !IPv6 */ 3851 if (ret == NULL && (proto == IPPROTO_IP || strcmp(av, "me") == 0 || 3852 !inet_pton(AF_INET6, host, &a))) 3853 ret = add_srcip(cmd, av); 3854 if (ret == NULL && strcmp(av, "any") != 0) 3855 ret = cmd; 3856 3857 free(host); 3858 return ret; 3859} 3860 3861static ipfw_insn * 3862add_dst(ipfw_insn *cmd, char *av, u_char proto) 3863{ 3864 struct in6_addr a; 3865 char *host, *ch; 3866 ipfw_insn *ret = NULL; 3867 3868 if ((host = strdup(av)) == NULL) 3869 return NULL; 3870 if ((ch = strrchr(host, '/')) != NULL) 3871 *ch = '\0'; 3872 3873 if (proto == IPPROTO_IPV6 || strcmp(av, "me6") == 0 || 3874 inet_pton(AF_INET6, host, &a)) 3875 ret = add_dstip6(cmd, av); 3876 /* XXX: should check for IPv4, not !IPv6 */ 3877 if (ret == NULL && (proto == IPPROTO_IP || strcmp(av, "me") == 0 || 3878 !inet_pton(AF_INET6, host, &a))) 3879 ret = add_dstip(cmd, av); 3880 if (ret == NULL && strcmp(av, "any") != 0) 3881 ret = cmd; 3882 3883 free(host); 3884 return ret; 3885} 3886 3887/* 3888 * Parse arguments and assemble the microinstructions which make up a rule. 3889 * Rules are added into the 'rulebuf' and then copied in the correct order 3890 * into the actual rule. 3891 * 3892 * The syntax for a rule starts with the action, followed by 3893 * optional action parameters, and the various match patterns. 3894 * In the assembled microcode, the first opcode must be an O_PROBE_STATE 3895 * (generated if the rule includes a keep-state option), then the 3896 * various match patterns, log/altq actions, and the actual action. 3897 * 3898 */ 3899void 3900ipfw_add(int ac, char *av[]) 3901{ 3902 /* 3903 * rules are added into the 'rulebuf' and then copied in 3904 * the correct order into the actual rule. 3905 * Some things that need to go out of order (prob, action etc.) 3906 * go into actbuf[]. 3907 */ 3908 static uint32_t rulebuf[255], actbuf[255], cmdbuf[255]; 3909 3910 ipfw_insn *src, *dst, *cmd, *action, *prev=NULL; 3911 ipfw_insn *first_cmd; /* first match pattern */ 3912 3913 struct ip_fw *rule; 3914 3915 /* 3916 * various flags used to record that we entered some fields. 3917 */ 3918 ipfw_insn *have_state = NULL; /* check-state or keep-state */ 3919 ipfw_insn *have_log = NULL, *have_altq = NULL, *have_tag = NULL; 3920 size_t len; 3921 3922 int i; 3923 3924 int open_par = 0; /* open parenthesis ( */ 3925 3926 /* proto is here because it is used to fetch ports */ 3927 u_char proto = IPPROTO_IP; /* default protocol */ 3928 3929 double match_prob = 1; /* match probability, default is always match */ 3930 3931 bzero(actbuf, sizeof(actbuf)); /* actions go here */ 3932 bzero(cmdbuf, sizeof(cmdbuf)); 3933 bzero(rulebuf, sizeof(rulebuf)); 3934 3935 rule = (struct ip_fw *)rulebuf; 3936 cmd = (ipfw_insn *)cmdbuf; 3937 action = (ipfw_insn *)actbuf; 3938 3939 av++; ac--; 3940 3941 /* [rule N] -- Rule number optional */ 3942 if (ac && isdigit(**av)) { 3943 rule->rulenum = atoi(*av); 3944 av++; 3945 ac--; 3946 } 3947 3948 /* [set N] -- set number (0..RESVD_SET), optional */ 3949 if (ac > 1 && _substrcmp(*av, "set") == 0) { 3950 int set = strtoul(av[1], NULL, 10); 3951 if (set < 0 || set > RESVD_SET) 3952 errx(EX_DATAERR, "illegal set %s", av[1]); 3953 rule->set = set; 3954 av += 2; ac -= 2; 3955 } 3956 3957 /* [prob D] -- match probability, optional */ 3958 if (ac > 1 && _substrcmp(*av, "prob") == 0) { 3959 match_prob = strtod(av[1], NULL); 3960 3961 if (match_prob <= 0 || match_prob > 1) 3962 errx(EX_DATAERR, "illegal match prob. %s", av[1]); 3963 av += 2; ac -= 2; 3964 } 3965 3966 /* action -- mandatory */ 3967 NEED1("missing action"); 3968 i = match_token(rule_actions, *av); 3969 ac--; av++; 3970 action->len = 1; /* default */ 3971 switch(i) { 3972 case TOK_CHECKSTATE: 3973 have_state = action; 3974 action->opcode = O_CHECK_STATE; 3975 break; 3976 3977 case TOK_ACCEPT: 3978 action->opcode = O_ACCEPT; 3979 break; 3980 3981 case TOK_DENY: 3982 action->opcode = O_DENY; 3983 action->arg1 = 0; 3984 break; 3985 3986 case TOK_REJECT: 3987 action->opcode = O_REJECT; 3988 action->arg1 = ICMP_UNREACH_HOST; 3989 break; 3990 3991 case TOK_RESET: 3992 action->opcode = O_REJECT; 3993 action->arg1 = ICMP_REJECT_RST; 3994 break; 3995 3996 case TOK_RESET6: 3997 action->opcode = O_UNREACH6; 3998 action->arg1 = ICMP6_UNREACH_RST; 3999 break; 4000 4001 case TOK_UNREACH: 4002 action->opcode = O_REJECT; 4003 NEED1("missing reject code"); 4004 fill_reject_code(&action->arg1, *av); 4005 ac--; av++; 4006 break; 4007 4008 case TOK_UNREACH6: 4009 action->opcode = O_UNREACH6; 4010 NEED1("missing unreach code"); 4011 fill_unreach6_code(&action->arg1, *av); 4012 ac--; av++; 4013 break; 4014 4015 case TOK_COUNT: 4016 action->opcode = O_COUNT; 4017 break; 4018 4019 case TOK_NAT: 4020 action->opcode = O_NAT; 4021 action->len = F_INSN_SIZE(ipfw_insn_nat); 4022 goto chkarg; 4023 4024 case TOK_QUEUE: 4025 action->opcode = O_QUEUE; 4026 goto chkarg; 4027 case TOK_PIPE: 4028 action->opcode = O_PIPE; 4029 goto chkarg; 4030 case TOK_SKIPTO: 4031 action->opcode = O_SKIPTO; 4032 goto chkarg; 4033 case TOK_NETGRAPH: 4034 action->opcode = O_NETGRAPH; 4035 goto chkarg; 4036 case TOK_NGTEE: 4037 action->opcode = O_NGTEE; 4038 goto chkarg; 4039 case TOK_DIVERT: 4040 action->opcode = O_DIVERT; 4041 goto chkarg; 4042 case TOK_TEE: 4043 action->opcode = O_TEE; 4044chkarg: 4045 if (!ac) 4046 errx(EX_USAGE, "missing argument for %s", *(av - 1)); 4047 if (isdigit(**av)) { 4048 action->arg1 = strtoul(*av, NULL, 10); 4049 if (action->arg1 <= 0 || action->arg1 >= IP_FW_TABLEARG) 4050 errx(EX_DATAERR, "illegal argument for %s", 4051 *(av - 1)); 4052 } else if (_substrcmp(*av, "tablearg") == 0) { 4053 action->arg1 = IP_FW_TABLEARG; 4054 } else if (i == TOK_DIVERT || i == TOK_TEE) { 4055 struct servent *s; 4056 setservent(1); 4057 s = getservbyname(av[0], "divert"); 4058 if (s != NULL) 4059 action->arg1 = ntohs(s->s_port); 4060 else 4061 errx(EX_DATAERR, "illegal divert/tee port"); 4062 } else 4063 errx(EX_DATAERR, "illegal argument for %s", *(av - 1)); 4064 ac--; av++; 4065 break; 4066 4067 case TOK_FORWARD: { 4068 ipfw_insn_sa *p = (ipfw_insn_sa *)action; 4069 char *s, *end; 4070 4071 NEED1("missing forward address[:port]"); 4072 4073 action->opcode = O_FORWARD_IP; 4074 action->len = F_INSN_SIZE(ipfw_insn_sa); 4075 4076 p->sa.sin_len = sizeof(struct sockaddr_in); 4077 p->sa.sin_family = AF_INET; 4078 p->sa.sin_port = 0; 4079 /* 4080 * locate the address-port separator (':' or ',') 4081 */ 4082 s = strchr(*av, ':'); 4083 if (s == NULL) 4084 s = strchr(*av, ','); 4085 if (s != NULL) { 4086 *(s++) = '\0'; 4087 i = strtoport(s, &end, 0 /* base */, 0 /* proto */); 4088 if (s == end) 4089 errx(EX_DATAERR, 4090 "illegal forwarding port ``%s''", s); 4091 p->sa.sin_port = (u_short)i; 4092 } 4093 if (_substrcmp(*av, "tablearg") == 0) 4094 p->sa.sin_addr.s_addr = INADDR_ANY; 4095 else 4096 lookup_host(*av, &(p->sa.sin_addr)); 4097 ac--; av++; 4098 break; 4099 } 4100 case TOK_COMMENT: 4101 /* pretend it is a 'count' rule followed by the comment */ 4102 action->opcode = O_COUNT; 4103 ac++; av--; /* go back... */ 4104 break; 4105 4106 case TOK_SETFIB: 4107 { 4108 int numfibs; 4109 size_t intsize = sizeof(int); 4110 4111 action->opcode = O_SETFIB; 4112 NEED1("missing fib number"); 4113 action->arg1 = strtoul(*av, NULL, 10); 4114 if (sysctlbyname("net.fibs", &numfibs, &intsize, NULL, 0) == -1) 4115 errx(EX_DATAERR, "fibs not suported.\n"); 4116 if (action->arg1 >= numfibs) /* Temporary */ 4117 errx(EX_DATAERR, "fib too large.\n"); 4118 ac--; av++; 4119 break; 4120 } 4121 4122 default: 4123 errx(EX_DATAERR, "invalid action %s\n", av[-1]); 4124 } 4125 action = next_cmd(action); 4126 4127 /* 4128 * [altq queuename] -- altq tag, optional 4129 * [log [logamount N]] -- log, optional 4130 * 4131 * If they exist, it go first in the cmdbuf, but then it is 4132 * skipped in the copy section to the end of the buffer. 4133 */ 4134 while (ac != 0 && (i = match_token(rule_action_params, *av)) != -1) { 4135 ac--; av++; 4136 switch (i) { 4137 case TOK_LOG: 4138 { 4139 ipfw_insn_log *c = (ipfw_insn_log *)cmd; 4140 int l; 4141 4142 if (have_log) 4143 errx(EX_DATAERR, 4144 "log cannot be specified more than once"); 4145 have_log = (ipfw_insn *)c; 4146 cmd->len = F_INSN_SIZE(ipfw_insn_log); 4147 cmd->opcode = O_LOG; 4148 if (ac && _substrcmp(*av, "logamount") == 0) { 4149 ac--; av++; 4150 NEED1("logamount requires argument"); 4151 l = atoi(*av); 4152 if (l < 0) 4153 errx(EX_DATAERR, 4154 "logamount must be positive"); 4155 c->max_log = l; 4156 ac--; av++; 4157 } else { 4158 len = sizeof(c->max_log); 4159 if (sysctlbyname("net.inet.ip.fw.verbose_limit", 4160 &c->max_log, &len, NULL, 0) == -1) 4161 errx(1, "sysctlbyname(\"%s\")", 4162 "net.inet.ip.fw.verbose_limit"); 4163 } 4164 } 4165 break; 4166 4167 case TOK_ALTQ: 4168 { 4169 ipfw_insn_altq *a = (ipfw_insn_altq *)cmd; 4170 4171 NEED1("missing altq queue name"); 4172 if (have_altq) 4173 errx(EX_DATAERR, 4174 "altq cannot be specified more than once"); 4175 have_altq = (ipfw_insn *)a; 4176 cmd->len = F_INSN_SIZE(ipfw_insn_altq); 4177 cmd->opcode = O_ALTQ; 4178 fill_altq_qid(&a->qid, *av); 4179 ac--; av++; 4180 } 4181 break; 4182 4183 case TOK_TAG: 4184 case TOK_UNTAG: { 4185 uint16_t tag; 4186 4187 if (have_tag) 4188 errx(EX_USAGE, "tag and untag cannot be " 4189 "specified more than once"); 4190 GET_UINT_ARG(tag, 1, IPFW_DEFAULT_RULE - 1, i, 4191 rule_action_params); 4192 have_tag = cmd; 4193 fill_cmd(cmd, O_TAG, (i == TOK_TAG) ? 0: F_NOT, tag); 4194 ac--; av++; 4195 break; 4196 } 4197 4198 default: 4199 abort(); 4200 } 4201 cmd = next_cmd(cmd); 4202 } 4203 4204 if (have_state) /* must be a check-state, we are done */ 4205 goto done; 4206 4207#define OR_START(target) \ 4208 if (ac && (*av[0] == '(' || *av[0] == '{')) { \ 4209 if (open_par) \ 4210 errx(EX_USAGE, "nested \"(\" not allowed\n"); \ 4211 prev = NULL; \ 4212 open_par = 1; \ 4213 if ( (av[0])[1] == '\0') { \ 4214 ac--; av++; \ 4215 } else \ 4216 (*av)++; \ 4217 } \ 4218 target: \ 4219 4220 4221#define CLOSE_PAR \ 4222 if (open_par) { \ 4223 if (ac && ( \ 4224 strcmp(*av, ")") == 0 || \ 4225 strcmp(*av, "}") == 0)) { \ 4226 prev = NULL; \ 4227 open_par = 0; \ 4228 ac--; av++; \ 4229 } else \ 4230 errx(EX_USAGE, "missing \")\"\n"); \ 4231 } 4232 4233#define NOT_BLOCK \ 4234 if (ac && _substrcmp(*av, "not") == 0) { \ 4235 if (cmd->len & F_NOT) \ 4236 errx(EX_USAGE, "double \"not\" not allowed\n"); \ 4237 cmd->len |= F_NOT; \ 4238 ac--; av++; \ 4239 } 4240 4241#define OR_BLOCK(target) \ 4242 if (ac && _substrcmp(*av, "or") == 0) { \ 4243 if (prev == NULL || open_par == 0) \ 4244 errx(EX_DATAERR, "invalid OR block"); \ 4245 prev->len |= F_OR; \ 4246 ac--; av++; \ 4247 goto target; \ 4248 } \ 4249 CLOSE_PAR; 4250 4251 first_cmd = cmd; 4252 4253#if 0 4254 /* 4255 * MAC addresses, optional. 4256 * If we have this, we skip the part "proto from src to dst" 4257 * and jump straight to the option parsing. 4258 */ 4259 NOT_BLOCK; 4260 NEED1("missing protocol"); 4261 if (_substrcmp(*av, "MAC") == 0 || 4262 _substrcmp(*av, "mac") == 0) { 4263 ac--; av++; /* the "MAC" keyword */ 4264 add_mac(cmd, ac, av); /* exits in case of errors */ 4265 cmd = next_cmd(cmd); 4266 ac -= 2; av += 2; /* dst-mac and src-mac */ 4267 NOT_BLOCK; 4268 NEED1("missing mac type"); 4269 if (add_mactype(cmd, ac, av[0])) 4270 cmd = next_cmd(cmd); 4271 ac--; av++; /* any or mac-type */ 4272 goto read_options; 4273 } 4274#endif 4275 4276 /* 4277 * protocol, mandatory 4278 */ 4279 OR_START(get_proto); 4280 NOT_BLOCK; 4281 NEED1("missing protocol"); 4282 if (add_proto_compat(cmd, *av, &proto)) { 4283 av++; ac--; 4284 if (F_LEN(cmd) != 0) { 4285 prev = cmd; 4286 cmd = next_cmd(cmd); 4287 } 4288 } else if (first_cmd != cmd) { 4289 errx(EX_DATAERR, "invalid protocol ``%s''", *av); 4290 } else 4291 goto read_options; 4292 OR_BLOCK(get_proto); 4293 4294 /* 4295 * "from", mandatory 4296 */ 4297 if (!ac || _substrcmp(*av, "from") != 0) 4298 errx(EX_USAGE, "missing ``from''"); 4299 ac--; av++; 4300 4301 /* 4302 * source IP, mandatory 4303 */ 4304 OR_START(source_ip); 4305 NOT_BLOCK; /* optional "not" */ 4306 NEED1("missing source address"); 4307 if (add_src(cmd, *av, proto)) { 4308 ac--; av++; 4309 if (F_LEN(cmd) != 0) { /* ! any */ 4310 prev = cmd; 4311 cmd = next_cmd(cmd); 4312 } 4313 } else 4314 errx(EX_USAGE, "bad source address %s", *av); 4315 OR_BLOCK(source_ip); 4316 4317 /* 4318 * source ports, optional 4319 */ 4320 NOT_BLOCK; /* optional "not" */ 4321 if (ac) { 4322 if (_substrcmp(*av, "any") == 0 || 4323 add_ports(cmd, *av, proto, O_IP_SRCPORT)) { 4324 ac--; av++; 4325 if (F_LEN(cmd) != 0) 4326 cmd = next_cmd(cmd); 4327 } 4328 } 4329 4330 /* 4331 * "to", mandatory 4332 */ 4333 if (!ac || _substrcmp(*av, "to") != 0) 4334 errx(EX_USAGE, "missing ``to''"); 4335 av++; ac--; 4336 4337 /* 4338 * destination, mandatory 4339 */ 4340 OR_START(dest_ip); 4341 NOT_BLOCK; /* optional "not" */ 4342 NEED1("missing dst address"); 4343 if (add_dst(cmd, *av, proto)) { 4344 ac--; av++; 4345 if (F_LEN(cmd) != 0) { /* ! any */ 4346 prev = cmd; 4347 cmd = next_cmd(cmd); 4348 } 4349 } else 4350 errx( EX_USAGE, "bad destination address %s", *av); 4351 OR_BLOCK(dest_ip); 4352 4353 /* 4354 * dest. ports, optional 4355 */ 4356 NOT_BLOCK; /* optional "not" */ 4357 if (ac) { 4358 if (_substrcmp(*av, "any") == 0 || 4359 add_ports(cmd, *av, proto, O_IP_DSTPORT)) { 4360 ac--; av++; 4361 if (F_LEN(cmd) != 0) 4362 cmd = next_cmd(cmd); 4363 } 4364 } 4365 4366read_options: 4367 if (ac && first_cmd == cmd) { 4368 /* 4369 * nothing specified so far, store in the rule to ease 4370 * printout later. 4371 */ 4372 rule->_pad = 1; 4373 } 4374 prev = NULL; 4375 while (ac) { 4376 char *s; 4377 ipfw_insn_u32 *cmd32; /* alias for cmd */ 4378 4379 s = *av; 4380 cmd32 = (ipfw_insn_u32 *)cmd; 4381 4382 if (*s == '!') { /* alternate syntax for NOT */ 4383 if (cmd->len & F_NOT) 4384 errx(EX_USAGE, "double \"not\" not allowed\n"); 4385 cmd->len = F_NOT; 4386 s++; 4387 } 4388 i = match_token(rule_options, s); 4389 ac--; av++; 4390 switch(i) { 4391 case TOK_NOT: 4392 if (cmd->len & F_NOT) 4393 errx(EX_USAGE, "double \"not\" not allowed\n"); 4394 cmd->len = F_NOT; 4395 break; 4396 4397 case TOK_OR: 4398 if (open_par == 0 || prev == NULL) 4399 errx(EX_USAGE, "invalid \"or\" block\n"); 4400 prev->len |= F_OR; 4401 break; 4402 4403 case TOK_STARTBRACE: 4404 if (open_par) 4405 errx(EX_USAGE, "+nested \"(\" not allowed\n"); 4406 open_par = 1; 4407 break; 4408 4409 case TOK_ENDBRACE: 4410 if (!open_par) 4411 errx(EX_USAGE, "+missing \")\"\n"); 4412 open_par = 0; 4413 prev = NULL; 4414 break; 4415 4416 case TOK_IN: 4417 fill_cmd(cmd, O_IN, 0, 0); 4418 break; 4419 4420 case TOK_OUT: 4421 cmd->len ^= F_NOT; /* toggle F_NOT */ 4422 fill_cmd(cmd, O_IN, 0, 0); 4423 break; 4424 4425 case TOK_DIVERTED: 4426 fill_cmd(cmd, O_DIVERTED, 0, 3); 4427 break; 4428 4429 case TOK_DIVERTEDLOOPBACK: 4430 fill_cmd(cmd, O_DIVERTED, 0, 1); 4431 break; 4432 4433 case TOK_DIVERTEDOUTPUT: 4434 fill_cmd(cmd, O_DIVERTED, 0, 2); 4435 break; 4436 4437 case TOK_FRAG: 4438 fill_cmd(cmd, O_FRAG, 0, 0); 4439 break; 4440 4441 case TOK_LAYER2: 4442 fill_cmd(cmd, O_LAYER2, 0, 0); 4443 break; 4444 4445 case TOK_XMIT: 4446 case TOK_RECV: 4447 case TOK_VIA: 4448 NEED1("recv, xmit, via require interface name" 4449 " or address"); 4450 fill_iface((ipfw_insn_if *)cmd, av[0]); 4451 ac--; av++; 4452 if (F_LEN(cmd) == 0) /* not a valid address */ 4453 break; 4454 if (i == TOK_XMIT) 4455 cmd->opcode = O_XMIT; 4456 else if (i == TOK_RECV) 4457 cmd->opcode = O_RECV; 4458 else if (i == TOK_VIA) 4459 cmd->opcode = O_VIA; 4460 break; 4461 4462 case TOK_ICMPTYPES: 4463 NEED1("icmptypes requires list of types"); 4464 fill_icmptypes((ipfw_insn_u32 *)cmd, *av); 4465 av++; ac--; 4466 break; 4467 4468 case TOK_ICMP6TYPES: 4469 NEED1("icmptypes requires list of types"); 4470 fill_icmp6types((ipfw_insn_icmp6 *)cmd, *av); 4471 av++; ac--; 4472 break; 4473 4474 case TOK_IPTTL: 4475 NEED1("ipttl requires TTL"); 4476 if (strpbrk(*av, "-,")) { 4477 if (!add_ports(cmd, *av, 0, O_IPTTL)) 4478 errx(EX_DATAERR, "invalid ipttl %s", *av); 4479 } else 4480 fill_cmd(cmd, O_IPTTL, 0, strtoul(*av, NULL, 0)); 4481 ac--; av++; 4482 break; 4483 4484 case TOK_IPID: 4485 NEED1("ipid requires id"); 4486 if (strpbrk(*av, "-,")) { 4487 if (!add_ports(cmd, *av, 0, O_IPID)) 4488 errx(EX_DATAERR, "invalid ipid %s", *av); 4489 } else 4490 fill_cmd(cmd, O_IPID, 0, strtoul(*av, NULL, 0)); 4491 ac--; av++; 4492 break; 4493 4494 case TOK_IPLEN: 4495 NEED1("iplen requires length"); 4496 if (strpbrk(*av, "-,")) { 4497 if (!add_ports(cmd, *av, 0, O_IPLEN)) 4498 errx(EX_DATAERR, "invalid ip len %s", *av); 4499 } else 4500 fill_cmd(cmd, O_IPLEN, 0, strtoul(*av, NULL, 0)); 4501 ac--; av++; 4502 break; 4503 4504 case TOK_IPVER: 4505 NEED1("ipver requires version"); 4506 fill_cmd(cmd, O_IPVER, 0, strtoul(*av, NULL, 0)); 4507 ac--; av++; 4508 break; 4509 4510 case TOK_IPPRECEDENCE: 4511 NEED1("ipprecedence requires value"); 4512 fill_cmd(cmd, O_IPPRECEDENCE, 0, 4513 (strtoul(*av, NULL, 0) & 7) << 5); 4514 ac--; av++; 4515 break; 4516 4517 case TOK_IPOPTS: 4518 NEED1("missing argument for ipoptions"); 4519 fill_flags(cmd, O_IPOPT, f_ipopts, *av); 4520 ac--; av++; 4521 break; 4522 4523 case TOK_IPTOS: 4524 NEED1("missing argument for iptos"); 4525 fill_flags(cmd, O_IPTOS, f_iptos, *av); 4526 ac--; av++; 4527 break; 4528 4529 case TOK_UID: 4530 NEED1("uid requires argument"); 4531 { 4532 char *end; 4533 uid_t uid; 4534 struct passwd *pwd; 4535 4536 cmd->opcode = O_UID; 4537 uid = strtoul(*av, &end, 0); 4538 pwd = (*end == '\0') ? getpwuid(uid) : getpwnam(*av); 4539 if (pwd == NULL) 4540 errx(EX_DATAERR, "uid \"%s\" nonexistent", *av); 4541 cmd32->d[0] = pwd->pw_uid; 4542 cmd->len |= F_INSN_SIZE(ipfw_insn_u32); 4543 ac--; av++; 4544 } 4545 break; 4546 4547 case TOK_GID: 4548 NEED1("gid requires argument"); 4549 { 4550 char *end; 4551 gid_t gid; 4552 struct group *grp; 4553 4554 cmd->opcode = O_GID; 4555 gid = strtoul(*av, &end, 0); 4556 grp = (*end == '\0') ? getgrgid(gid) : getgrnam(*av); 4557 if (grp == NULL) 4558 errx(EX_DATAERR, "gid \"%s\" nonexistent", *av); 4559 cmd32->d[0] = grp->gr_gid; 4560 cmd->len |= F_INSN_SIZE(ipfw_insn_u32); 4561 ac--; av++; 4562 } 4563 break; 4564 4565 case TOK_JAIL: 4566 NEED1("jail requires argument"); 4567 { 4568 char *end; 4569 int jid; 4570 4571 cmd->opcode = O_JAIL; 4572 jid = (int)strtol(*av, &end, 0); 4573 if (jid < 0 || *end != '\0') 4574 errx(EX_DATAERR, "jail requires prison ID"); 4575 cmd32->d[0] = (uint32_t)jid; 4576 cmd->len |= F_INSN_SIZE(ipfw_insn_u32); 4577 ac--; av++; 4578 } 4579 break; 4580 4581 case TOK_ESTAB: 4582 fill_cmd(cmd, O_ESTAB, 0, 0); 4583 break; 4584 4585 case TOK_SETUP: 4586 fill_cmd(cmd, O_TCPFLAGS, 0, 4587 (TH_SYN) | ( (TH_ACK) & 0xff) <<8 ); 4588 break; 4589 4590 case TOK_TCPDATALEN: 4591 NEED1("tcpdatalen requires length"); 4592 if (strpbrk(*av, "-,")) { 4593 if (!add_ports(cmd, *av, 0, O_TCPDATALEN)) 4594 errx(EX_DATAERR, "invalid tcpdata len %s", *av); 4595 } else 4596 fill_cmd(cmd, O_TCPDATALEN, 0, 4597 strtoul(*av, NULL, 0)); 4598 ac--; av++; 4599 break; 4600 4601 case TOK_TCPOPTS: 4602 NEED1("missing argument for tcpoptions"); 4603 fill_flags(cmd, O_TCPOPTS, f_tcpopts, *av); 4604 ac--; av++; 4605 break; 4606 4607 case TOK_TCPSEQ: 4608 case TOK_TCPACK: 4609 NEED1("tcpseq/tcpack requires argument"); 4610 cmd->len = F_INSN_SIZE(ipfw_insn_u32); 4611 cmd->opcode = (i == TOK_TCPSEQ) ? O_TCPSEQ : O_TCPACK; 4612 cmd32->d[0] = htonl(strtoul(*av, NULL, 0)); 4613 ac--; av++; 4614 break; 4615 4616 case TOK_TCPWIN: 4617 NEED1("tcpwin requires length"); 4618 fill_cmd(cmd, O_TCPWIN, 0, 4619 htons(strtoul(*av, NULL, 0))); 4620 ac--; av++; 4621 break; 4622 4623 case TOK_TCPFLAGS: 4624 NEED1("missing argument for tcpflags"); 4625 cmd->opcode = O_TCPFLAGS; 4626 fill_flags(cmd, O_TCPFLAGS, f_tcpflags, *av); 4627 ac--; av++; 4628 break; 4629 4630 case TOK_KEEPSTATE: 4631 if (open_par) 4632 errx(EX_USAGE, "keep-state cannot be part " 4633 "of an or block"); 4634 if (have_state) 4635 errx(EX_USAGE, "only one of keep-state " 4636 "and limit is allowed"); 4637 have_state = cmd; 4638 fill_cmd(cmd, O_KEEP_STATE, 0, 0); 4639 break; 4640 4641 case TOK_LIMIT: { 4642 ipfw_insn_limit *c = (ipfw_insn_limit *)cmd; 4643 int val; 4644 4645 if (open_par) 4646 errx(EX_USAGE, 4647 "limit cannot be part of an or block"); 4648 if (have_state) 4649 errx(EX_USAGE, "only one of keep-state and " 4650 "limit is allowed"); 4651 have_state = cmd; 4652 4653 cmd->len = F_INSN_SIZE(ipfw_insn_limit); 4654 cmd->opcode = O_LIMIT; 4655 c->limit_mask = c->conn_limit = 0; 4656 4657 while (ac > 0) { 4658 if ((val = match_token(limit_masks, *av)) <= 0) 4659 break; 4660 c->limit_mask |= val; 4661 ac--; av++; 4662 } 4663 4664 if (c->limit_mask == 0) 4665 errx(EX_USAGE, "limit: missing limit mask"); 4666 4667 GET_UINT_ARG(c->conn_limit, 1, IPFW_DEFAULT_RULE - 1, 4668 TOK_LIMIT, rule_options); 4669 4670 ac--; av++; 4671 break; 4672 } 4673 4674 case TOK_PROTO: 4675 NEED1("missing protocol"); 4676 if (add_proto(cmd, *av, &proto)) { 4677 ac--; av++; 4678 } else 4679 errx(EX_DATAERR, "invalid protocol ``%s''", 4680 *av); 4681 break; 4682 4683 case TOK_SRCIP: 4684 NEED1("missing source IP"); 4685 if (add_srcip(cmd, *av)) { 4686 ac--; av++; 4687 } 4688 break; 4689 4690 case TOK_DSTIP: 4691 NEED1("missing destination IP"); 4692 if (add_dstip(cmd, *av)) { 4693 ac--; av++; 4694 } 4695 break; 4696 4697 case TOK_SRCIP6: 4698 NEED1("missing source IP6"); 4699 if (add_srcip6(cmd, *av)) { 4700 ac--; av++; 4701 } 4702 break; 4703 4704 case TOK_DSTIP6: 4705 NEED1("missing destination IP6"); 4706 if (add_dstip6(cmd, *av)) { 4707 ac--; av++; 4708 } 4709 break; 4710 4711 case TOK_SRCPORT: 4712 NEED1("missing source port"); 4713 if (_substrcmp(*av, "any") == 0 || 4714 add_ports(cmd, *av, proto, O_IP_SRCPORT)) { 4715 ac--; av++; 4716 } else 4717 errx(EX_DATAERR, "invalid source port %s", *av); 4718 break; 4719 4720 case TOK_DSTPORT: 4721 NEED1("missing destination port"); 4722 if (_substrcmp(*av, "any") == 0 || 4723 add_ports(cmd, *av, proto, O_IP_DSTPORT)) { 4724 ac--; av++; 4725 } else 4726 errx(EX_DATAERR, "invalid destination port %s", 4727 *av); 4728 break; 4729 4730 case TOK_MAC: 4731 if (add_mac(cmd, ac, av)) { 4732 ac -= 2; av += 2; 4733 } 4734 break; 4735 4736 case TOK_MACTYPE: 4737 NEED1("missing mac type"); 4738 if (!add_mactype(cmd, ac, *av)) 4739 errx(EX_DATAERR, "invalid mac type %s", *av); 4740 ac--; av++; 4741 break; 4742 4743 case TOK_VERREVPATH: 4744 fill_cmd(cmd, O_VERREVPATH, 0, 0); 4745 break; 4746 4747 case TOK_VERSRCREACH: 4748 fill_cmd(cmd, O_VERSRCREACH, 0, 0); 4749 break; 4750 4751 case TOK_ANTISPOOF: 4752 fill_cmd(cmd, O_ANTISPOOF, 0, 0); 4753 break; 4754 4755 case TOK_IPSEC: 4756 fill_cmd(cmd, O_IPSEC, 0, 0); 4757 break; 4758 4759 case TOK_IPV6: 4760 fill_cmd(cmd, O_IP6, 0, 0); 4761 break; 4762 4763 case TOK_IPV4: 4764 fill_cmd(cmd, O_IP4, 0, 0); 4765 break; 4766 4767 case TOK_EXT6HDR: 4768 fill_ext6hdr( cmd, *av ); 4769 ac--; av++; 4770 break; 4771 4772 case TOK_FLOWID: 4773 if (proto != IPPROTO_IPV6 ) 4774 errx( EX_USAGE, "flow-id filter is active " 4775 "only for ipv6 protocol\n"); 4776 fill_flow6( (ipfw_insn_u32 *) cmd, *av ); 4777 ac--; av++; 4778 break; 4779 4780 case TOK_COMMENT: 4781 fill_comment(cmd, ac, av); 4782 av += ac; 4783 ac = 0; 4784 break; 4785 4786 case TOK_TAGGED: 4787 if (ac > 0 && strpbrk(*av, "-,")) { 4788 if (!add_ports(cmd, *av, 0, O_TAGGED)) 4789 errx(EX_DATAERR, "tagged: invalid tag" 4790 " list: %s", *av); 4791 } 4792 else { 4793 uint16_t tag; 4794 4795 GET_UINT_ARG(tag, 1, IPFW_DEFAULT_RULE - 1, 4796 TOK_TAGGED, rule_options); 4797 fill_cmd(cmd, O_TAGGED, 0, tag); 4798 } 4799 ac--; av++; 4800 break; 4801 4802 case TOK_FIB: 4803 NEED1("fib requires fib number"); 4804 fill_cmd(cmd, O_FIB, 0, strtoul(*av, NULL, 0)); 4805 ac--; av++; 4806 break; 4807 4808 default: 4809 errx(EX_USAGE, "unrecognised option [%d] %s\n", i, s); 4810 } 4811 if (F_LEN(cmd) > 0) { /* prepare to advance */ 4812 prev = cmd; 4813 cmd = next_cmd(cmd); 4814 } 4815 } 4816 4817done: 4818 /* 4819 * Now copy stuff into the rule. 4820 * If we have a keep-state option, the first instruction 4821 * must be a PROBE_STATE (which is generated here). 4822 * If we have a LOG option, it was stored as the first command, 4823 * and now must be moved to the top of the action part. 4824 */ 4825 dst = (ipfw_insn *)rule->cmd; 4826 4827 /* 4828 * First thing to write into the command stream is the match probability. 4829 */ 4830 if (match_prob != 1) { /* 1 means always match */ 4831 dst->opcode = O_PROB; 4832 dst->len = 2; 4833 *((int32_t *)(dst+1)) = (int32_t)(match_prob * 0x7fffffff); 4834 dst += dst->len; 4835 } 4836 4837 /* 4838 * generate O_PROBE_STATE if necessary 4839 */ 4840 if (have_state && have_state->opcode != O_CHECK_STATE) { 4841 fill_cmd(dst, O_PROBE_STATE, 0, 0); 4842 dst = next_cmd(dst); 4843 } 4844 4845 /* copy all commands but O_LOG, O_KEEP_STATE, O_LIMIT, O_ALTQ, O_TAG */ 4846 for (src = (ipfw_insn *)cmdbuf; src != cmd; src += i) { 4847 i = F_LEN(src); 4848 4849 switch (src->opcode) { 4850 case O_LOG: 4851 case O_KEEP_STATE: 4852 case O_LIMIT: 4853 case O_ALTQ: 4854 case O_TAG: 4855 break; 4856 default: 4857 bcopy(src, dst, i * sizeof(uint32_t)); 4858 dst += i; 4859 } 4860 } 4861 4862 /* 4863 * put back the have_state command as last opcode 4864 */ 4865 if (have_state && have_state->opcode != O_CHECK_STATE) { 4866 i = F_LEN(have_state); 4867 bcopy(have_state, dst, i * sizeof(uint32_t)); 4868 dst += i; 4869 } 4870 /* 4871 * start action section 4872 */ 4873 rule->act_ofs = dst - rule->cmd; 4874 4875 /* put back O_LOG, O_ALTQ, O_TAG if necessary */ 4876 if (have_log) { 4877 i = F_LEN(have_log); 4878 bcopy(have_log, dst, i * sizeof(uint32_t)); 4879 dst += i; 4880 } 4881 if (have_altq) { 4882 i = F_LEN(have_altq); 4883 bcopy(have_altq, dst, i * sizeof(uint32_t)); 4884 dst += i; 4885 } 4886 if (have_tag) { 4887 i = F_LEN(have_tag); 4888 bcopy(have_tag, dst, i * sizeof(uint32_t)); 4889 dst += i; 4890 } 4891 /* 4892 * copy all other actions 4893 */ 4894 for (src = (ipfw_insn *)actbuf; src != action; src += i) { 4895 i = F_LEN(src); 4896 bcopy(src, dst, i * sizeof(uint32_t)); 4897 dst += i; 4898 } 4899 4900 rule->cmd_len = (uint32_t *)dst - (uint32_t *)(rule->cmd); 4901 i = (char *)dst - (char *)rule; 4902 if (do_cmd(IP_FW_ADD, rule, (uintptr_t)&i) == -1) 4903 err(EX_UNAVAILABLE, "getsockopt(%s)", "IP_FW_ADD"); 4904 if (!co.do_quiet) 4905 show_ipfw(rule, 0, 0); 4906} 4907 4908/* 4909 * clear the counters or the log counters. 4910 */ 4911void 4912ipfw_zero(int ac, char *av[], int optname /* 0 = IP_FW_ZERO, 1 = IP_FW_RESETLOG */) 4913{ 4914 uint32_t arg, saved_arg; 4915 int failed = EX_OK; 4916 char const *errstr; 4917 char const *name = optname ? "RESETLOG" : "ZERO"; 4918 4919 optname = optname ? IP_FW_RESETLOG : IP_FW_ZERO; 4920 4921 av++; ac--; 4922 4923 if (!ac) { 4924 /* clear all entries */ 4925 if (do_cmd(optname, NULL, 0) < 0) 4926 err(EX_UNAVAILABLE, "setsockopt(IP_FW_%s)", name); 4927 if (!co.do_quiet) 4928 printf("%s.\n", optname == IP_FW_ZERO ? 4929 "Accounting cleared":"Logging counts reset"); 4930 4931 return; 4932 } 4933 4934 while (ac) { 4935 /* Rule number */ 4936 if (isdigit(**av)) { 4937 arg = strtonum(*av, 0, 0xffff, &errstr); 4938 if (errstr) 4939 errx(EX_DATAERR, 4940 "invalid rule number %s\n", *av); 4941 saved_arg = arg; 4942 if (co.use_set) 4943 arg |= (1 << 24) | ((co.use_set - 1) << 16); 4944 av++; 4945 ac--; 4946 if (do_cmd(optname, &arg, sizeof(arg))) { 4947 warn("rule %u: setsockopt(IP_FW_%s)", 4948 saved_arg, name); 4949 failed = EX_UNAVAILABLE; 4950 } else if (!co.do_quiet) 4951 printf("Entry %d %s.\n", saved_arg, 4952 optname == IP_FW_ZERO ? 4953 "cleared" : "logging count reset"); 4954 } else { 4955 errx(EX_USAGE, "invalid rule number ``%s''", *av); 4956 } 4957 } 4958 if (failed != EX_OK) 4959 exit(failed); 4960} 4961 4962void 4963ipfw_flush(int force) 4964{ 4965 int cmd = co.do_pipe ? IP_DUMMYNET_FLUSH : IP_FW_FLUSH; 4966 4967 if (!force && !co.do_quiet) { /* need to ask user */ 4968 int c; 4969 4970 printf("Are you sure? [yn] "); 4971 fflush(stdout); 4972 do { 4973 c = toupper(getc(stdin)); 4974 while (c != '\n' && getc(stdin) != '\n') 4975 if (feof(stdin)) 4976 return; /* and do not flush */ 4977 } while (c != 'Y' && c != 'N'); 4978 printf("\n"); 4979 if (c == 'N') /* user said no */ 4980 return; 4981 } 4982 /* `ipfw set N flush` - is the same that `ipfw delete set N` */ 4983 if (co.use_set) { 4984 uint32_t arg = ((co.use_set - 1) & 0xffff) | (1 << 24); 4985 if (do_cmd(IP_FW_DEL, &arg, sizeof(arg)) < 0) 4986 err(EX_UNAVAILABLE, "setsockopt(IP_FW_DEL)"); 4987 } else if (do_cmd(cmd, NULL, 0) < 0) 4988 err(EX_UNAVAILABLE, "setsockopt(IP_%s_FLUSH)", 4989 co.do_pipe ? "DUMMYNET" : "FW"); 4990 if (!co.do_quiet) 4991 printf("Flushed all %s.\n", co.do_pipe ? "pipes" : "rules"); 4992} 4993 4994 4995static void table_list(ipfw_table_entry ent, int need_header); 4996 4997/* 4998 * This one handles all table-related commands 4999 * ipfw table N add addr[/masklen] [value] 5000 * ipfw table N delete addr[/masklen] 5001 * ipfw table {N | all} flush 5002 * ipfw table {N | all} list 5003 */ 5004void 5005ipfw_table_handler(int ac, char *av[]) 5006{ 5007 ipfw_table_entry ent; 5008 int do_add; 5009 int is_all; 5010 size_t len; 5011 char *p; 5012 uint32_t a; 5013 uint32_t tables_max; 5014 5015 len = sizeof(tables_max); 5016 if (sysctlbyname("net.inet.ip.fw.tables_max", &tables_max, &len, 5017 NULL, 0) == -1) { 5018#ifdef IPFW_TABLES_MAX 5019 warn("Warn: Failed to get the max tables number via sysctl. " 5020 "Using the compiled in defaults. \nThe reason was"); 5021 tables_max = IPFW_TABLES_MAX; 5022#else 5023 errx(1, "Failed sysctlbyname(\"net.inet.ip.fw.tables_max\")"); 5024#endif 5025 } 5026 5027 ac--; av++; 5028 if (ac && isdigit(**av)) { 5029 ent.tbl = atoi(*av); 5030 is_all = 0; 5031 ac--; av++; 5032 } else if (ac && _substrcmp(*av, "all") == 0) { 5033 ent.tbl = 0; 5034 is_all = 1; 5035 ac--; av++; 5036 } else 5037 errx(EX_USAGE, "table number or 'all' keyword required"); 5038 if (ent.tbl >= tables_max) 5039 errx(EX_USAGE, "The table number exceeds the maximum allowed " 5040 "value (%d)", tables_max - 1); 5041 NEED1("table needs command"); 5042 if (is_all && _substrcmp(*av, "list") != 0 5043 && _substrcmp(*av, "flush") != 0) 5044 errx(EX_USAGE, "table number required"); 5045 5046 if (_substrcmp(*av, "add") == 0 || 5047 _substrcmp(*av, "delete") == 0) { 5048 do_add = **av == 'a'; 5049 ac--; av++; 5050 if (!ac) 5051 errx(EX_USAGE, "IP address required"); 5052 p = strchr(*av, '/'); 5053 if (p) { 5054 *p++ = '\0'; 5055 ent.masklen = atoi(p); 5056 if (ent.masklen > 32) 5057 errx(EX_DATAERR, "bad width ``%s''", p); 5058 } else 5059 ent.masklen = 32; 5060 if (lookup_host(*av, (struct in_addr *)&ent.addr) != 0) 5061 errx(EX_NOHOST, "hostname ``%s'' unknown", *av); 5062 ac--; av++; 5063 if (do_add && ac) { 5064 unsigned int tval; 5065 /* isdigit is a bit of a hack here.. */ 5066 if (strchr(*av, (int)'.') == NULL && isdigit(**av)) { 5067 ent.value = strtoul(*av, NULL, 0); 5068 } else { 5069 if (lookup_host(*av, (struct in_addr *)&tval) == 0) { 5070 /* The value must be stored in host order * 5071 * so that the values < 65k can be distinguished */ 5072 ent.value = ntohl(tval); 5073 } else { 5074 errx(EX_NOHOST, "hostname ``%s'' unknown", *av); 5075 } 5076 } 5077 } else 5078 ent.value = 0; 5079 if (do_cmd(do_add ? IP_FW_TABLE_ADD : IP_FW_TABLE_DEL, 5080 &ent, sizeof(ent)) < 0) { 5081 /* If running silent, don't bomb out on these errors. */ 5082 if (!(co.do_quiet && (errno == (do_add ? EEXIST : ESRCH)))) 5083 err(EX_OSERR, "setsockopt(IP_FW_TABLE_%s)", 5084 do_add ? "ADD" : "DEL"); 5085 /* In silent mode, react to a failed add by deleting */ 5086 if (do_add) { 5087 do_cmd(IP_FW_TABLE_DEL, &ent, sizeof(ent)); 5088 if (do_cmd(IP_FW_TABLE_ADD, 5089 &ent, sizeof(ent)) < 0) 5090 err(EX_OSERR, 5091 "setsockopt(IP_FW_TABLE_ADD)"); 5092 } 5093 } 5094 } else if (_substrcmp(*av, "flush") == 0) { 5095 a = is_all ? tables_max : (ent.tbl + 1); 5096 do { 5097 if (do_cmd(IP_FW_TABLE_FLUSH, &ent.tbl, 5098 sizeof(ent.tbl)) < 0) 5099 err(EX_OSERR, "setsockopt(IP_FW_TABLE_FLUSH)"); 5100 } while (++ent.tbl < a); 5101 } else if (_substrcmp(*av, "list") == 0) { 5102 a = is_all ? tables_max : (ent.tbl + 1); 5103 do { 5104 table_list(ent, is_all); 5105 } while (++ent.tbl < a); 5106 } else 5107 errx(EX_USAGE, "invalid table command %s", *av); 5108} 5109 5110static void 5111table_list(ipfw_table_entry ent, int need_header) 5112{ 5113 ipfw_table *tbl; 5114 socklen_t l; 5115 uint32_t a; 5116 5117 a = ent.tbl; 5118 l = sizeof(a); 5119 if (do_cmd(IP_FW_TABLE_GETSIZE, &a, (uintptr_t)&l) < 0) 5120 err(EX_OSERR, "getsockopt(IP_FW_TABLE_GETSIZE)"); 5121 5122 /* If a is zero we have nothing to do, the table is empty. */ 5123 if (a == 0) 5124 return; 5125 5126 l = sizeof(*tbl) + a * sizeof(ipfw_table_entry); 5127 tbl = safe_calloc(1, l); 5128 tbl->tbl = ent.tbl; 5129 if (do_cmd(IP_FW_TABLE_LIST, tbl, (uintptr_t)&l) < 0) 5130 err(EX_OSERR, "getsockopt(IP_FW_TABLE_LIST)"); 5131 if (tbl->cnt && need_header) 5132 printf("---table(%d)---\n", tbl->tbl); 5133 for (a = 0; a < tbl->cnt; a++) { 5134 unsigned int tval; 5135 tval = tbl->ent[a].value; 5136 if (co.do_value_as_ip) { 5137 char tbuf[128]; 5138 strncpy(tbuf, inet_ntoa(*(struct in_addr *) 5139 &tbl->ent[a].addr), 127); 5140 /* inet_ntoa expects network order */ 5141 tval = htonl(tval); 5142 printf("%s/%u %s\n", tbuf, tbl->ent[a].masklen, 5143 inet_ntoa(*(struct in_addr *)&tval)); 5144 } else { 5145 printf("%s/%u %u\n", 5146 inet_ntoa(*(struct in_addr *)&tbl->ent[a].addr), 5147 tbl->ent[a].masklen, tval); 5148 } 5149 } 5150 free(tbl); 5151} 5152 5153void 5154ipfw_show_nat(int ac, char **av) 5155{ 5156 struct cfg_nat *n; 5157 struct cfg_redir *e; 5158 int cmd, i, nbytes, do_cfg, do_rule, frule, lrule, nalloc, size; 5159 int nat_cnt, redir_cnt, r; 5160 uint8_t *data, *p; 5161 char *endptr; 5162 5163 do_rule = 0; 5164 nalloc = 1024; 5165 size = 0; 5166 data = NULL; 5167 frule = 0; 5168 lrule = IPFW_DEFAULT_RULE; /* max ipfw rule number */ 5169 ac--; av++; 5170 5171 if (co.test_only) 5172 return; 5173 5174 /* Parse parameters. */ 5175 for (cmd = IP_FW_NAT_GET_LOG, do_cfg = 0; ac != 0; ac--, av++) { 5176 if (!strncmp(av[0], "config", strlen(av[0]))) { 5177 cmd = IP_FW_NAT_GET_CONFIG, do_cfg = 1; 5178 continue; 5179 } 5180 /* Convert command line rule #. */ 5181 frule = lrule = strtoul(av[0], &endptr, 10); 5182 if (*endptr == '-') 5183 lrule = strtoul(endptr+1, &endptr, 10); 5184 if (lrule == 0) 5185 err(EX_USAGE, "invalid rule number: %s", av[0]); 5186 do_rule = 1; 5187 } 5188 5189 nbytes = nalloc; 5190 while (nbytes >= nalloc) { 5191 nalloc = nalloc * 2; 5192 nbytes = nalloc; 5193 data = safe_realloc(data, nbytes); 5194 if (do_cmd(cmd, data, (uintptr_t)&nbytes) < 0) 5195 err(EX_OSERR, "getsockopt(IP_FW_GET_%s)", 5196 (cmd == IP_FW_NAT_GET_LOG) ? "LOG" : "CONFIG"); 5197 } 5198 if (nbytes == 0) 5199 exit(0); 5200 if (do_cfg) { 5201 nat_cnt = *((int *)data); 5202 for (i = sizeof(nat_cnt); nat_cnt; nat_cnt--) { 5203 n = (struct cfg_nat *)&data[i]; 5204 if (frule <= n->id && lrule >= n->id) 5205 print_nat_config(&data[i]); 5206 i += sizeof(struct cfg_nat); 5207 for (redir_cnt = 0; redir_cnt < n->redir_cnt; redir_cnt++) { 5208 e = (struct cfg_redir *)&data[i]; 5209 i += sizeof(struct cfg_redir) + e->spool_cnt * 5210 sizeof(struct cfg_spool); 5211 } 5212 } 5213 } else { 5214 for (i = 0; 1; i += LIBALIAS_BUF_SIZE + sizeof(int)) { 5215 p = &data[i]; 5216 if (p == data + nbytes) 5217 break; 5218 bcopy(p, &r, sizeof(int)); 5219 if (do_rule) { 5220 if (!(frule <= r && lrule >= r)) 5221 continue; 5222 } 5223 printf("nat %u: %s\n", r, p+sizeof(int)); 5224 } 5225 } 5226} 5227