ipfw2.c revision 187764
1/* 2 * Copyright (c) 2002-2003 Luigi Rizzo 3 * Copyright (c) 1996 Alex Nash, Paul Traina, Poul-Henning Kamp 4 * Copyright (c) 1994 Ugen J.S.Antsilevich 5 * 6 * Idea and grammar partially left from: 7 * Copyright (c) 1993 Daniel Boulet 8 * 9 * Redistribution and use in source forms, with and without modification, 10 * are permitted provided that this entire comment appears intact. 11 * 12 * Redistribution in binary form may occur without any restrictions. 13 * Obviously, it would be nice if you gave credit where credit is due 14 * but requiring it would be too onerous. 15 * 16 * This software is provided ``AS IS'' without any warranties of any kind. 17 * 18 * NEW command line interface for IP firewall facility 19 * 20 * $FreeBSD: head/sbin/ipfw/ipfw2.c 187764 2009-01-27 09:06:25Z luigi $ 21 */ 22 23#include <sys/types.h> 24#include <sys/socket.h> 25#include <sys/sockio.h> 26#include <sys/sysctl.h> 27#include <sys/wait.h> 28 29#include <ctype.h> 30#include <err.h> 31#include <errno.h> 32#include <grp.h> 33#include <netdb.h> 34#include <pwd.h> 35#include <signal.h> 36#include <stdio.h> 37#include <stdlib.h> 38#include <string.h> 39#include <sysexits.h> 40#include <timeconv.h> /* _long_to_time */ 41#include <unistd.h> 42#include <fcntl.h> 43 44#define IPFW_INTERNAL /* Access to protected structures in ip_fw.h. */ 45 46#include <net/ethernet.h> 47#include <net/if.h> 48#include <net/if_dl.h> 49#include <net/pfvar.h> 50#include <net/route.h> /* def. of struct route */ 51#include <netinet/in.h> 52#include <netinet/in_systm.h> 53#include <netinet/ip.h> 54#include <netinet/ip_icmp.h> 55#include <netinet/icmp6.h> 56#include <netinet/ip_fw.h> 57#include <netinet/ip_dummynet.h> 58#include <netinet/tcp.h> 59#include <arpa/inet.h> 60#include <alias.h> 61 62/* 63 * Options that can be set on the command line. 64 * When reading commands from a file, a subset of the options can also 65 * be applied globally by specifying them before the file name. 66 * After that, each line can contain its own option that changes 67 * the global value. 68 * XXX The context is not restored after each line. 69 */ 70 71struct cmdline_opts { 72 /* boolean options: */ 73 int do_value_as_ip; /* show table value as IP */ 74 int do_resolv; /* try to resolve all ip to names */ 75 int do_time; /* Show time stamps */ 76 int do_quiet; /* Be quiet in add and flush */ 77 int do_pipe; /* this cmd refers to a pipe */ 78 int do_nat; /* this cmd refers to a nat config */ 79 int do_dynamic; /* display dynamic rules */ 80 int do_expired; /* display expired dynamic rules */ 81 int do_compact; /* show rules in compact mode */ 82 int do_force; /* do not ask for confirmation */ 83 int show_sets; /* display the set each rule belongs to */ 84 int test_only; /* only check syntax */ 85 int comment_only; /* only print action and comment */ 86 int verbose; /* be verbose on some commands */ 87 88 /* The options below can have multiple values. */ 89 90 int do_sort; /* field to sort results (0 = no) */ 91 /* valid fields are 1 and above */ 92 93 int use_set; /* work with specified set number */ 94 /* 0 means all sets, otherwise apply to set use_set - 1 */ 95 96}; 97 98struct cmdline_opts co; 99 100/* 101 * the following macro returns an error message if we run out of 102 * arguments. 103 */ 104#define NEED1(msg) {if (!ac) errx(EX_USAGE, msg);} 105 106#define GET_UINT_ARG(arg, min, max, tok, s_x) do { \ 107 if (!ac) \ 108 errx(EX_USAGE, "%s: missing argument", match_value(s_x, tok)); \ 109 if (_substrcmp(*av, "tablearg") == 0) { \ 110 arg = IP_FW_TABLEARG; \ 111 break; \ 112 } \ 113 \ 114 { \ 115 long val; \ 116 char *end; \ 117 \ 118 val = strtol(*av, &end, 10); \ 119 \ 120 if (!isdigit(**av) || *end != '\0' || (val == 0 && errno == EINVAL)) \ 121 errx(EX_DATAERR, "%s: invalid argument: %s", \ 122 match_value(s_x, tok), *av); \ 123 \ 124 if (errno == ERANGE || val < min || val > max) \ 125 errx(EX_DATAERR, "%s: argument is out of range (%u..%u): %s", \ 126 match_value(s_x, tok), min, max, *av); \ 127 \ 128 if (val == IP_FW_TABLEARG) \ 129 errx(EX_DATAERR, "%s: illegal argument value: %s", \ 130 match_value(s_x, tok), *av); \ 131 arg = val; \ 132 } \ 133} while (0) 134 135static void 136PRINT_UINT_ARG(const char *str, uint32_t arg) 137{ 138 if (str != NULL) 139 printf("%s",str); 140 if (arg == IP_FW_TABLEARG) 141 printf("tablearg"); 142 else 143 printf("%u", arg); 144} 145 146/* 147 * _s_x is a structure that stores a string <-> token pairs, used in 148 * various places in the parser. Entries are stored in arrays, 149 * with an entry with s=NULL as terminator. 150 * The search routines are match_token() and match_value(). 151 * Often, an element with x=0 contains an error string. 152 * 153 */ 154struct _s_x { 155 char const *s; 156 int x; 157}; 158 159static struct _s_x f_tcpflags[] = { 160 { "syn", TH_SYN }, 161 { "fin", TH_FIN }, 162 { "ack", TH_ACK }, 163 { "psh", TH_PUSH }, 164 { "rst", TH_RST }, 165 { "urg", TH_URG }, 166 { "tcp flag", 0 }, 167 { NULL, 0 } 168}; 169 170static struct _s_x f_tcpopts[] = { 171 { "mss", IP_FW_TCPOPT_MSS }, 172 { "maxseg", IP_FW_TCPOPT_MSS }, 173 { "window", IP_FW_TCPOPT_WINDOW }, 174 { "sack", IP_FW_TCPOPT_SACK }, 175 { "ts", IP_FW_TCPOPT_TS }, 176 { "timestamp", IP_FW_TCPOPT_TS }, 177 { "cc", IP_FW_TCPOPT_CC }, 178 { "tcp option", 0 }, 179 { NULL, 0 } 180}; 181 182/* 183 * IP options span the range 0 to 255 so we need to remap them 184 * (though in fact only the low 5 bits are significant). 185 */ 186static struct _s_x f_ipopts[] = { 187 { "ssrr", IP_FW_IPOPT_SSRR}, 188 { "lsrr", IP_FW_IPOPT_LSRR}, 189 { "rr", IP_FW_IPOPT_RR}, 190 { "ts", IP_FW_IPOPT_TS}, 191 { "ip option", 0 }, 192 { NULL, 0 } 193}; 194 195static struct _s_x f_iptos[] = { 196 { "lowdelay", IPTOS_LOWDELAY}, 197 { "throughput", IPTOS_THROUGHPUT}, 198 { "reliability", IPTOS_RELIABILITY}, 199 { "mincost", IPTOS_MINCOST}, 200 { "congestion", IPTOS_ECN_CE}, 201 { "ecntransport", IPTOS_ECN_ECT0}, 202 { "ip tos option", 0}, 203 { NULL, 0 } 204}; 205 206static struct _s_x limit_masks[] = { 207 {"all", DYN_SRC_ADDR|DYN_SRC_PORT|DYN_DST_ADDR|DYN_DST_PORT}, 208 {"src-addr", DYN_SRC_ADDR}, 209 {"src-port", DYN_SRC_PORT}, 210 {"dst-addr", DYN_DST_ADDR}, 211 {"dst-port", DYN_DST_PORT}, 212 {NULL, 0} 213}; 214 215/* 216 * we use IPPROTO_ETHERTYPE as a fake protocol id to call the print routines 217 * This is only used in this code. 218 */ 219#define IPPROTO_ETHERTYPE 0x1000 220static struct _s_x ether_types[] = { 221 /* 222 * Note, we cannot use "-:&/" in the names because they are field 223 * separators in the type specifications. Also, we use s = NULL as 224 * end-delimiter, because a type of 0 can be legal. 225 */ 226 { "ip", 0x0800 }, 227 { "ipv4", 0x0800 }, 228 { "ipv6", 0x86dd }, 229 { "arp", 0x0806 }, 230 { "rarp", 0x8035 }, 231 { "vlan", 0x8100 }, 232 { "loop", 0x9000 }, 233 { "trail", 0x1000 }, 234 { "at", 0x809b }, 235 { "atalk", 0x809b }, 236 { "aarp", 0x80f3 }, 237 { "pppoe_disc", 0x8863 }, 238 { "pppoe_sess", 0x8864 }, 239 { "ipx_8022", 0x00E0 }, 240 { "ipx_8023", 0x0000 }, 241 { "ipx_ii", 0x8137 }, 242 { "ipx_snap", 0x8137 }, 243 { "ipx", 0x8137 }, 244 { "ns", 0x0600 }, 245 { NULL, 0 } 246}; 247 248static void show_usage(void); 249 250enum tokens { 251 TOK_NULL=0, 252 253 TOK_OR, 254 TOK_NOT, 255 TOK_STARTBRACE, 256 TOK_ENDBRACE, 257 258 TOK_ACCEPT, 259 TOK_COUNT, 260 TOK_PIPE, 261 TOK_QUEUE, 262 TOK_DIVERT, 263 TOK_TEE, 264 TOK_NETGRAPH, 265 TOK_NGTEE, 266 TOK_FORWARD, 267 TOK_SKIPTO, 268 TOK_DENY, 269 TOK_REJECT, 270 TOK_RESET, 271 TOK_UNREACH, 272 TOK_CHECKSTATE, 273 TOK_NAT, 274 275 TOK_ALTQ, 276 TOK_LOG, 277 TOK_TAG, 278 TOK_UNTAG, 279 280 TOK_TAGGED, 281 TOK_UID, 282 TOK_GID, 283 TOK_JAIL, 284 TOK_IN, 285 TOK_LIMIT, 286 TOK_KEEPSTATE, 287 TOK_LAYER2, 288 TOK_OUT, 289 TOK_DIVERTED, 290 TOK_DIVERTEDLOOPBACK, 291 TOK_DIVERTEDOUTPUT, 292 TOK_XMIT, 293 TOK_RECV, 294 TOK_VIA, 295 TOK_FRAG, 296 TOK_IPOPTS, 297 TOK_IPLEN, 298 TOK_IPID, 299 TOK_IPPRECEDENCE, 300 TOK_IPTOS, 301 TOK_IPTTL, 302 TOK_IPVER, 303 TOK_ESTAB, 304 TOK_SETUP, 305 TOK_TCPDATALEN, 306 TOK_TCPFLAGS, 307 TOK_TCPOPTS, 308 TOK_TCPSEQ, 309 TOK_TCPACK, 310 TOK_TCPWIN, 311 TOK_ICMPTYPES, 312 TOK_MAC, 313 TOK_MACTYPE, 314 TOK_VERREVPATH, 315 TOK_VERSRCREACH, 316 TOK_ANTISPOOF, 317 TOK_IPSEC, 318 TOK_COMMENT, 319 320 TOK_PLR, 321 TOK_NOERROR, 322 TOK_BUCKETS, 323 TOK_DSTIP, 324 TOK_SRCIP, 325 TOK_DSTPORT, 326 TOK_SRCPORT, 327 TOK_ALL, 328 TOK_MASK, 329 TOK_BW, 330 TOK_DELAY, 331 TOK_RED, 332 TOK_GRED, 333 TOK_DROPTAIL, 334 TOK_PROTO, 335 TOK_WEIGHT, 336 TOK_IP, 337 TOK_IF, 338 TOK_ALOG, 339 TOK_DENY_INC, 340 TOK_SAME_PORTS, 341 TOK_UNREG_ONLY, 342 TOK_RESET_ADDR, 343 TOK_ALIAS_REV, 344 TOK_PROXY_ONLY, 345 TOK_REDIR_ADDR, 346 TOK_REDIR_PORT, 347 TOK_REDIR_PROTO, 348 349 TOK_IPV6, 350 TOK_FLOWID, 351 TOK_ICMP6TYPES, 352 TOK_EXT6HDR, 353 TOK_DSTIP6, 354 TOK_SRCIP6, 355 356 TOK_IPV4, 357 TOK_UNREACH6, 358 TOK_RESET6, 359 360 TOK_FIB, 361 TOK_SETFIB, 362}; 363 364struct _s_x dummynet_params[] = { 365 { "plr", TOK_PLR }, 366 { "noerror", TOK_NOERROR }, 367 { "buckets", TOK_BUCKETS }, 368 { "dst-ip", TOK_DSTIP }, 369 { "src-ip", TOK_SRCIP }, 370 { "dst-port", TOK_DSTPORT }, 371 { "src-port", TOK_SRCPORT }, 372 { "proto", TOK_PROTO }, 373 { "weight", TOK_WEIGHT }, 374 { "all", TOK_ALL }, 375 { "mask", TOK_MASK }, 376 { "droptail", TOK_DROPTAIL }, 377 { "red", TOK_RED }, 378 { "gred", TOK_GRED }, 379 { "bw", TOK_BW }, 380 { "bandwidth", TOK_BW }, 381 { "delay", TOK_DELAY }, 382 { "pipe", TOK_PIPE }, 383 { "queue", TOK_QUEUE }, 384 { "flow-id", TOK_FLOWID}, 385 { "dst-ipv6", TOK_DSTIP6}, 386 { "dst-ip6", TOK_DSTIP6}, 387 { "src-ipv6", TOK_SRCIP6}, 388 { "src-ip6", TOK_SRCIP6}, 389 { "dummynet-params", TOK_NULL }, 390 { NULL, 0 } /* terminator */ 391}; 392 393struct _s_x nat_params[] = { 394 { "ip", TOK_IP }, 395 { "if", TOK_IF }, 396 { "log", TOK_ALOG }, 397 { "deny_in", TOK_DENY_INC }, 398 { "same_ports", TOK_SAME_PORTS }, 399 { "unreg_only", TOK_UNREG_ONLY }, 400 { "reset", TOK_RESET_ADDR }, 401 { "reverse", TOK_ALIAS_REV }, 402 { "proxy_only", TOK_PROXY_ONLY }, 403 { "redirect_addr", TOK_REDIR_ADDR }, 404 { "redirect_port", TOK_REDIR_PORT }, 405 { "redirect_proto", TOK_REDIR_PROTO }, 406 { NULL, 0 } /* terminator */ 407}; 408 409struct _s_x rule_actions[] = { 410 { "accept", TOK_ACCEPT }, 411 { "pass", TOK_ACCEPT }, 412 { "allow", TOK_ACCEPT }, 413 { "permit", TOK_ACCEPT }, 414 { "count", TOK_COUNT }, 415 { "pipe", TOK_PIPE }, 416 { "queue", TOK_QUEUE }, 417 { "divert", TOK_DIVERT }, 418 { "tee", TOK_TEE }, 419 { "netgraph", TOK_NETGRAPH }, 420 { "ngtee", TOK_NGTEE }, 421 { "fwd", TOK_FORWARD }, 422 { "forward", TOK_FORWARD }, 423 { "skipto", TOK_SKIPTO }, 424 { "deny", TOK_DENY }, 425 { "drop", TOK_DENY }, 426 { "reject", TOK_REJECT }, 427 { "reset6", TOK_RESET6 }, 428 { "reset", TOK_RESET }, 429 { "unreach6", TOK_UNREACH6 }, 430 { "unreach", TOK_UNREACH }, 431 { "check-state", TOK_CHECKSTATE }, 432 { "//", TOK_COMMENT }, 433 { "nat", TOK_NAT }, 434 { "setfib", TOK_SETFIB }, 435 { NULL, 0 } /* terminator */ 436}; 437 438struct _s_x rule_action_params[] = { 439 { "altq", TOK_ALTQ }, 440 { "log", TOK_LOG }, 441 { "tag", TOK_TAG }, 442 { "untag", TOK_UNTAG }, 443 { NULL, 0 } /* terminator */ 444}; 445 446struct _s_x rule_options[] = { 447 { "tagged", TOK_TAGGED }, 448 { "uid", TOK_UID }, 449 { "gid", TOK_GID }, 450 { "jail", TOK_JAIL }, 451 { "in", TOK_IN }, 452 { "limit", TOK_LIMIT }, 453 { "keep-state", TOK_KEEPSTATE }, 454 { "bridged", TOK_LAYER2 }, 455 { "layer2", TOK_LAYER2 }, 456 { "out", TOK_OUT }, 457 { "diverted", TOK_DIVERTED }, 458 { "diverted-loopback", TOK_DIVERTEDLOOPBACK }, 459 { "diverted-output", TOK_DIVERTEDOUTPUT }, 460 { "xmit", TOK_XMIT }, 461 { "recv", TOK_RECV }, 462 { "via", TOK_VIA }, 463 { "fragment", TOK_FRAG }, 464 { "frag", TOK_FRAG }, 465 { "fib", TOK_FIB }, 466 { "ipoptions", TOK_IPOPTS }, 467 { "ipopts", TOK_IPOPTS }, 468 { "iplen", TOK_IPLEN }, 469 { "ipid", TOK_IPID }, 470 { "ipprecedence", TOK_IPPRECEDENCE }, 471 { "iptos", TOK_IPTOS }, 472 { "ipttl", TOK_IPTTL }, 473 { "ipversion", TOK_IPVER }, 474 { "ipver", TOK_IPVER }, 475 { "estab", TOK_ESTAB }, 476 { "established", TOK_ESTAB }, 477 { "setup", TOK_SETUP }, 478 { "tcpdatalen", TOK_TCPDATALEN }, 479 { "tcpflags", TOK_TCPFLAGS }, 480 { "tcpflgs", TOK_TCPFLAGS }, 481 { "tcpoptions", TOK_TCPOPTS }, 482 { "tcpopts", TOK_TCPOPTS }, 483 { "tcpseq", TOK_TCPSEQ }, 484 { "tcpack", TOK_TCPACK }, 485 { "tcpwin", TOK_TCPWIN }, 486 { "icmptype", TOK_ICMPTYPES }, 487 { "icmptypes", TOK_ICMPTYPES }, 488 { "dst-ip", TOK_DSTIP }, 489 { "src-ip", TOK_SRCIP }, 490 { "dst-port", TOK_DSTPORT }, 491 { "src-port", TOK_SRCPORT }, 492 { "proto", TOK_PROTO }, 493 { "MAC", TOK_MAC }, 494 { "mac", TOK_MAC }, 495 { "mac-type", TOK_MACTYPE }, 496 { "verrevpath", TOK_VERREVPATH }, 497 { "versrcreach", TOK_VERSRCREACH }, 498 { "antispoof", TOK_ANTISPOOF }, 499 { "ipsec", TOK_IPSEC }, 500 { "icmp6type", TOK_ICMP6TYPES }, 501 { "icmp6types", TOK_ICMP6TYPES }, 502 { "ext6hdr", TOK_EXT6HDR}, 503 { "flow-id", TOK_FLOWID}, 504 { "ipv6", TOK_IPV6}, 505 { "ip6", TOK_IPV6}, 506 { "ipv4", TOK_IPV4}, 507 { "ip4", TOK_IPV4}, 508 { "dst-ipv6", TOK_DSTIP6}, 509 { "dst-ip6", TOK_DSTIP6}, 510 { "src-ipv6", TOK_SRCIP6}, 511 { "src-ip6", TOK_SRCIP6}, 512 { "//", TOK_COMMENT }, 513 514 { "not", TOK_NOT }, /* pseudo option */ 515 { "!", /* escape ? */ TOK_NOT }, /* pseudo option */ 516 { "or", TOK_OR }, /* pseudo option */ 517 { "|", /* escape */ TOK_OR }, /* pseudo option */ 518 { "{", TOK_STARTBRACE }, /* pseudo option */ 519 { "(", TOK_STARTBRACE }, /* pseudo option */ 520 { "}", TOK_ENDBRACE }, /* pseudo option */ 521 { ")", TOK_ENDBRACE }, /* pseudo option */ 522 { NULL, 0 } /* terminator */ 523}; 524 525static __inline uint64_t 526align_uint64(uint64_t *pll) { 527 uint64_t ret; 528 529 bcopy (pll, &ret, sizeof(ret)); 530 return ret; 531} 532 533static void * 534safe_calloc(size_t number, size_t size) 535{ 536 void *ret = calloc(number, size); 537 538 if (ret == NULL) 539 err(EX_OSERR, "calloc"); 540 return ret; 541} 542 543static void * 544safe_realloc(void *ptr, size_t size) 545{ 546 void *ret = realloc(ptr, size); 547 548 if (ret == NULL) 549 err(EX_OSERR, "realloc"); 550 return ret; 551} 552 553/* 554 * conditionally runs the command. 555 */ 556static int 557do_cmd(int optname, void *optval, uintptr_t optlen) 558{ 559 static int s = -1; /* the socket */ 560 int i; 561 562 if (co.test_only) 563 return 0; 564 565 if (s == -1) 566 s = socket(AF_INET, SOCK_RAW, IPPROTO_RAW); 567 if (s < 0) 568 err(EX_UNAVAILABLE, "socket"); 569 570 if (optname == IP_FW_GET || optname == IP_DUMMYNET_GET || 571 optname == IP_FW_ADD || optname == IP_FW_TABLE_LIST || 572 optname == IP_FW_TABLE_GETSIZE || 573 optname == IP_FW_NAT_GET_CONFIG || 574 optname == IP_FW_NAT_GET_LOG) 575 i = getsockopt(s, IPPROTO_IP, optname, optval, 576 (socklen_t *)optlen); 577 else 578 i = setsockopt(s, IPPROTO_IP, optname, optval, optlen); 579 return i; 580} 581 582/** 583 * match_token takes a table and a string, returns the value associated 584 * with the string (-1 in case of failure). 585 */ 586static int 587match_token(struct _s_x *table, char *string) 588{ 589 struct _s_x *pt; 590 uint i = strlen(string); 591 592 for (pt = table ; i && pt->s != NULL ; pt++) 593 if (strlen(pt->s) == i && !bcmp(string, pt->s, i)) 594 return pt->x; 595 return -1; 596} 597 598/** 599 * match_value takes a table and a value, returns the string associated 600 * with the value (NULL in case of failure). 601 */ 602static char const * 603match_value(struct _s_x *p, int value) 604{ 605 for (; p->s != NULL; p++) 606 if (p->x == value) 607 return p->s; 608 return NULL; 609} 610 611/* 612 * _substrcmp takes two strings and returns 1 if they do not match, 613 * and 0 if they match exactly or the first string is a sub-string 614 * of the second. A warning is printed to stderr in the case that the 615 * first string is a sub-string of the second. 616 * 617 * This function will be removed in the future through the usual 618 * deprecation process. 619 */ 620static int 621_substrcmp(const char *str1, const char* str2) 622{ 623 624 if (strncmp(str1, str2, strlen(str1)) != 0) 625 return 1; 626 627 if (strlen(str1) != strlen(str2)) 628 warnx("DEPRECATED: '%s' matched '%s' as a sub-string", 629 str1, str2); 630 return 0; 631} 632 633/* 634 * _substrcmp2 takes three strings and returns 1 if the first two do not match, 635 * and 0 if they match exactly or the second string is a sub-string 636 * of the first. A warning is printed to stderr in the case that the 637 * first string does not match the third. 638 * 639 * This function exists to warn about the bizzare construction 640 * strncmp(str, "by", 2) which is used to allow people to use a shotcut 641 * for "bytes". The problem is that in addition to accepting "by", 642 * "byt", "byte", and "bytes", it also excepts "by_rabid_dogs" and any 643 * other string beginning with "by". 644 * 645 * This function will be removed in the future through the usual 646 * deprecation process. 647 */ 648static int 649_substrcmp2(const char *str1, const char* str2, const char* str3) 650{ 651 652 if (strncmp(str1, str2, strlen(str2)) != 0) 653 return 1; 654 655 if (strcmp(str1, str3) != 0) 656 warnx("DEPRECATED: '%s' matched '%s'", 657 str1, str3); 658 return 0; 659} 660 661/* 662 * prints one port, symbolic or numeric 663 */ 664static void 665print_port(int proto, uint16_t port) 666{ 667 668 if (proto == IPPROTO_ETHERTYPE) { 669 char const *s; 670 671 if (co.do_resolv && (s = match_value(ether_types, port)) ) 672 printf("%s", s); 673 else 674 printf("0x%04x", port); 675 } else { 676 struct servent *se = NULL; 677 if (co.do_resolv) { 678 struct protoent *pe = getprotobynumber(proto); 679 680 se = getservbyport(htons(port), pe ? pe->p_name : NULL); 681 } 682 if (se) 683 printf("%s", se->s_name); 684 else 685 printf("%d", port); 686 } 687} 688 689struct _s_x _port_name[] = { 690 {"dst-port", O_IP_DSTPORT}, 691 {"src-port", O_IP_SRCPORT}, 692 {"ipid", O_IPID}, 693 {"iplen", O_IPLEN}, 694 {"ipttl", O_IPTTL}, 695 {"mac-type", O_MAC_TYPE}, 696 {"tcpdatalen", O_TCPDATALEN}, 697 {"tagged", O_TAGGED}, 698 {NULL, 0} 699}; 700 701/* 702 * Print the values in a list 16-bit items of the types above. 703 * XXX todo: add support for mask. 704 */ 705static void 706print_newports(ipfw_insn_u16 *cmd, int proto, int opcode) 707{ 708 uint16_t *p = cmd->ports; 709 int i; 710 char const *sep; 711 712 if (opcode != 0) { 713 sep = match_value(_port_name, opcode); 714 if (sep == NULL) 715 sep = "???"; 716 printf (" %s", sep); 717 } 718 sep = " "; 719 for (i = F_LEN((ipfw_insn *)cmd) - 1; i > 0; i--, p += 2) { 720 printf(sep); 721 print_port(proto, p[0]); 722 if (p[0] != p[1]) { 723 printf("-"); 724 print_port(proto, p[1]); 725 } 726 sep = ","; 727 } 728} 729 730/* 731 * Like strtol, but also translates service names into port numbers 732 * for some protocols. 733 * In particular: 734 * proto == -1 disables the protocol check; 735 * proto == IPPROTO_ETHERTYPE looks up an internal table 736 * proto == <some value in /etc/protocols> matches the values there. 737 * Returns *end == s in case the parameter is not found. 738 */ 739static int 740strtoport(char *s, char **end, int base, int proto) 741{ 742 char *p, *buf; 743 char *s1; 744 int i; 745 746 *end = s; /* default - not found */ 747 if (*s == '\0') 748 return 0; /* not found */ 749 750 if (isdigit(*s)) 751 return strtol(s, end, base); 752 753 /* 754 * find separator. '\\' escapes the next char. 755 */ 756 for (s1 = s; *s1 && (isalnum(*s1) || *s1 == '\\') ; s1++) 757 if (*s1 == '\\' && s1[1] != '\0') 758 s1++; 759 760 buf = safe_calloc(s1 - s + 1, 1); 761 762 /* 763 * copy into a buffer skipping backslashes 764 */ 765 for (p = s, i = 0; p != s1 ; p++) 766 if (*p != '\\') 767 buf[i++] = *p; 768 buf[i++] = '\0'; 769 770 if (proto == IPPROTO_ETHERTYPE) { 771 i = match_token(ether_types, buf); 772 free(buf); 773 if (i != -1) { /* found */ 774 *end = s1; 775 return i; 776 } 777 } else { 778 struct protoent *pe = NULL; 779 struct servent *se; 780 781 if (proto != 0) 782 pe = getprotobynumber(proto); 783 setservent(1); 784 se = getservbyname(buf, pe ? pe->p_name : NULL); 785 free(buf); 786 if (se != NULL) { 787 *end = s1; 788 return ntohs(se->s_port); 789 } 790 } 791 return 0; /* not found */ 792} 793 794/* 795 * Map between current altq queue id numbers and names. 796 */ 797static int altq_fetched = 0; 798static TAILQ_HEAD(, pf_altq) altq_entries = 799 TAILQ_HEAD_INITIALIZER(altq_entries); 800 801static void 802altq_set_enabled(int enabled) 803{ 804 int pffd; 805 806 pffd = open("/dev/pf", O_RDWR); 807 if (pffd == -1) 808 err(EX_UNAVAILABLE, 809 "altq support opening pf(4) control device"); 810 if (enabled) { 811 if (ioctl(pffd, DIOCSTARTALTQ) != 0 && errno != EEXIST) 812 err(EX_UNAVAILABLE, "enabling altq"); 813 } else { 814 if (ioctl(pffd, DIOCSTOPALTQ) != 0 && errno != ENOENT) 815 err(EX_UNAVAILABLE, "disabling altq"); 816 } 817 close(pffd); 818} 819 820static void 821altq_fetch(void) 822{ 823 struct pfioc_altq pfioc; 824 struct pf_altq *altq; 825 int pffd; 826 unsigned int mnr; 827 828 if (altq_fetched) 829 return; 830 altq_fetched = 1; 831 pffd = open("/dev/pf", O_RDONLY); 832 if (pffd == -1) { 833 warn("altq support opening pf(4) control device"); 834 return; 835 } 836 bzero(&pfioc, sizeof(pfioc)); 837 if (ioctl(pffd, DIOCGETALTQS, &pfioc) != 0) { 838 warn("altq support getting queue list"); 839 close(pffd); 840 return; 841 } 842 mnr = pfioc.nr; 843 for (pfioc.nr = 0; pfioc.nr < mnr; pfioc.nr++) { 844 if (ioctl(pffd, DIOCGETALTQ, &pfioc) != 0) { 845 if (errno == EBUSY) 846 break; 847 warn("altq support getting queue list"); 848 close(pffd); 849 return; 850 } 851 if (pfioc.altq.qid == 0) 852 continue; 853 altq = safe_calloc(1, sizeof(*altq)); 854 *altq = pfioc.altq; 855 TAILQ_INSERT_TAIL(&altq_entries, altq, entries); 856 } 857 close(pffd); 858} 859 860static u_int32_t 861altq_name_to_qid(const char *name) 862{ 863 struct pf_altq *altq; 864 865 altq_fetch(); 866 TAILQ_FOREACH(altq, &altq_entries, entries) 867 if (strcmp(name, altq->qname) == 0) 868 break; 869 if (altq == NULL) 870 errx(EX_DATAERR, "altq has no queue named `%s'", name); 871 return altq->qid; 872} 873 874static const char * 875altq_qid_to_name(u_int32_t qid) 876{ 877 struct pf_altq *altq; 878 879 altq_fetch(); 880 TAILQ_FOREACH(altq, &altq_entries, entries) 881 if (qid == altq->qid) 882 break; 883 if (altq == NULL) 884 return NULL; 885 return altq->qname; 886} 887 888static void 889fill_altq_qid(u_int32_t *qid, const char *av) 890{ 891 *qid = altq_name_to_qid(av); 892} 893 894/* 895 * Fill the body of the command with the list of port ranges. 896 */ 897static int 898fill_newports(ipfw_insn_u16 *cmd, char *av, int proto) 899{ 900 uint16_t a, b, *p = cmd->ports; 901 int i = 0; 902 char *s = av; 903 904 while (*s) { 905 a = strtoport(av, &s, 0, proto); 906 if (s == av) /* empty or invalid argument */ 907 return (0); 908 909 switch (*s) { 910 case '-': /* a range */ 911 av = s + 1; 912 b = strtoport(av, &s, 0, proto); 913 /* Reject expressions like '1-abc' or '1-2-3'. */ 914 if (s == av || (*s != ',' && *s != '\0')) 915 return (0); 916 p[0] = a; 917 p[1] = b; 918 break; 919 case ',': /* comma separated list */ 920 case '\0': 921 p[0] = p[1] = a; 922 break; 923 default: 924 warnx("port list: invalid separator <%c> in <%s>", 925 *s, av); 926 return (0); 927 } 928 929 i++; 930 p += 2; 931 av = s + 1; 932 } 933 if (i > 0) { 934 if (i + 1 > F_LEN_MASK) 935 errx(EX_DATAERR, "too many ports/ranges\n"); 936 cmd->o.len |= i + 1; /* leave F_NOT and F_OR untouched */ 937 } 938 return (i); 939} 940 941static struct _s_x icmpcodes[] = { 942 { "net", ICMP_UNREACH_NET }, 943 { "host", ICMP_UNREACH_HOST }, 944 { "protocol", ICMP_UNREACH_PROTOCOL }, 945 { "port", ICMP_UNREACH_PORT }, 946 { "needfrag", ICMP_UNREACH_NEEDFRAG }, 947 { "srcfail", ICMP_UNREACH_SRCFAIL }, 948 { "net-unknown", ICMP_UNREACH_NET_UNKNOWN }, 949 { "host-unknown", ICMP_UNREACH_HOST_UNKNOWN }, 950 { "isolated", ICMP_UNREACH_ISOLATED }, 951 { "net-prohib", ICMP_UNREACH_NET_PROHIB }, 952 { "host-prohib", ICMP_UNREACH_HOST_PROHIB }, 953 { "tosnet", ICMP_UNREACH_TOSNET }, 954 { "toshost", ICMP_UNREACH_TOSHOST }, 955 { "filter-prohib", ICMP_UNREACH_FILTER_PROHIB }, 956 { "host-precedence", ICMP_UNREACH_HOST_PRECEDENCE }, 957 { "precedence-cutoff", ICMP_UNREACH_PRECEDENCE_CUTOFF }, 958 { NULL, 0 } 959}; 960 961static void 962fill_reject_code(u_short *codep, char *str) 963{ 964 int val; 965 char *s; 966 967 val = strtoul(str, &s, 0); 968 if (s == str || *s != '\0' || val >= 0x100) 969 val = match_token(icmpcodes, str); 970 if (val < 0) 971 errx(EX_DATAERR, "unknown ICMP unreachable code ``%s''", str); 972 *codep = val; 973 return; 974} 975 976static void 977print_reject_code(uint16_t code) 978{ 979 char const *s = match_value(icmpcodes, code); 980 981 if (s != NULL) 982 printf("unreach %s", s); 983 else 984 printf("unreach %u", code); 985} 986 987static struct _s_x icmp6codes[] = { 988 { "no-route", ICMP6_DST_UNREACH_NOROUTE }, 989 { "admin-prohib", ICMP6_DST_UNREACH_ADMIN }, 990 { "address", ICMP6_DST_UNREACH_ADDR }, 991 { "port", ICMP6_DST_UNREACH_NOPORT }, 992 { NULL, 0 } 993}; 994 995static void 996fill_unreach6_code(u_short *codep, char *str) 997{ 998 int val; 999 char *s; 1000 1001 val = strtoul(str, &s, 0); 1002 if (s == str || *s != '\0' || val >= 0x100) 1003 val = match_token(icmp6codes, str); 1004 if (val < 0) 1005 errx(EX_DATAERR, "unknown ICMPv6 unreachable code ``%s''", str); 1006 *codep = val; 1007 return; 1008} 1009 1010static void 1011print_unreach6_code(uint16_t code) 1012{ 1013 char const *s = match_value(icmp6codes, code); 1014 1015 if (s != NULL) 1016 printf("unreach6 %s", s); 1017 else 1018 printf("unreach6 %u", code); 1019} 1020 1021/* 1022 * Returns the number of bits set (from left) in a contiguous bitmask, 1023 * or -1 if the mask is not contiguous. 1024 * XXX this needs a proper fix. 1025 * This effectively works on masks in big-endian (network) format. 1026 * when compiled on little endian architectures. 1027 * 1028 * First bit is bit 7 of the first byte -- note, for MAC addresses, 1029 * the first bit on the wire is bit 0 of the first byte. 1030 * len is the max length in bits. 1031 */ 1032static int 1033contigmask(uint8_t *p, int len) 1034{ 1035 int i, n; 1036 1037 for (i=0; i<len ; i++) 1038 if ( (p[i/8] & (1 << (7 - (i%8)))) == 0) /* first bit unset */ 1039 break; 1040 for (n=i+1; n < len; n++) 1041 if ( (p[n/8] & (1 << (7 - (n%8)))) != 0) 1042 return -1; /* mask not contiguous */ 1043 return i; 1044} 1045 1046/* 1047 * print flags set/clear in the two bitmasks passed as parameters. 1048 * There is a specialized check for f_tcpflags. 1049 */ 1050static void 1051print_flags(char const *name, ipfw_insn *cmd, struct _s_x *list) 1052{ 1053 char const *comma = ""; 1054 int i; 1055 uint8_t set = cmd->arg1 & 0xff; 1056 uint8_t clear = (cmd->arg1 >> 8) & 0xff; 1057 1058 if (list == f_tcpflags && set == TH_SYN && clear == TH_ACK) { 1059 printf(" setup"); 1060 return; 1061 } 1062 1063 printf(" %s ", name); 1064 for (i=0; list[i].x != 0; i++) { 1065 if (set & list[i].x) { 1066 set &= ~list[i].x; 1067 printf("%s%s", comma, list[i].s); 1068 comma = ","; 1069 } 1070 if (clear & list[i].x) { 1071 clear &= ~list[i].x; 1072 printf("%s!%s", comma, list[i].s); 1073 comma = ","; 1074 } 1075 } 1076} 1077 1078/* 1079 * Print the ip address contained in a command. 1080 */ 1081static void 1082print_ip(ipfw_insn_ip *cmd, char const *s) 1083{ 1084 struct hostent *he = NULL; 1085 int len = F_LEN((ipfw_insn *)cmd); 1086 uint32_t *a = ((ipfw_insn_u32 *)cmd)->d; 1087 1088 printf("%s%s ", cmd->o.len & F_NOT ? " not": "", s); 1089 1090 if (cmd->o.opcode == O_IP_SRC_ME || cmd->o.opcode == O_IP_DST_ME) { 1091 printf("me"); 1092 return; 1093 } 1094 if (cmd->o.opcode == O_IP_SRC_LOOKUP || 1095 cmd->o.opcode == O_IP_DST_LOOKUP) { 1096 printf("table(%u", ((ipfw_insn *)cmd)->arg1); 1097 if (len == F_INSN_SIZE(ipfw_insn_u32)) 1098 printf(",%u", *a); 1099 printf(")"); 1100 return; 1101 } 1102 if (cmd->o.opcode == O_IP_SRC_SET || cmd->o.opcode == O_IP_DST_SET) { 1103 uint32_t x, *map = (uint32_t *)&(cmd->mask); 1104 int i, j; 1105 char comma = '{'; 1106 1107 x = cmd->o.arg1 - 1; 1108 x = htonl( ~x ); 1109 cmd->addr.s_addr = htonl(cmd->addr.s_addr); 1110 printf("%s/%d", inet_ntoa(cmd->addr), 1111 contigmask((uint8_t *)&x, 32)); 1112 x = cmd->addr.s_addr = htonl(cmd->addr.s_addr); 1113 x &= 0xff; /* base */ 1114 /* 1115 * Print bits and ranges. 1116 * Locate first bit set (i), then locate first bit unset (j). 1117 * If we have 3+ consecutive bits set, then print them as a 1118 * range, otherwise only print the initial bit and rescan. 1119 */ 1120 for (i=0; i < cmd->o.arg1; i++) 1121 if (map[i/32] & (1<<(i & 31))) { 1122 for (j=i+1; j < cmd->o.arg1; j++) 1123 if (!(map[ j/32] & (1<<(j & 31)))) 1124 break; 1125 printf("%c%d", comma, i+x); 1126 if (j>i+2) { /* range has at least 3 elements */ 1127 printf("-%d", j-1+x); 1128 i = j-1; 1129 } 1130 comma = ','; 1131 } 1132 printf("}"); 1133 return; 1134 } 1135 /* 1136 * len == 2 indicates a single IP, whereas lists of 1 or more 1137 * addr/mask pairs have len = (2n+1). We convert len to n so we 1138 * use that to count the number of entries. 1139 */ 1140 for (len = len / 2; len > 0; len--, a += 2) { 1141 int mb = /* mask length */ 1142 (cmd->o.opcode == O_IP_SRC || cmd->o.opcode == O_IP_DST) ? 1143 32 : contigmask((uint8_t *)&(a[1]), 32); 1144 if (mb == 32 && co.do_resolv) 1145 he = gethostbyaddr((char *)&(a[0]), sizeof(u_long), AF_INET); 1146 if (he != NULL) /* resolved to name */ 1147 printf("%s", he->h_name); 1148 else if (mb == 0) /* any */ 1149 printf("any"); 1150 else { /* numeric IP followed by some kind of mask */ 1151 printf("%s", inet_ntoa( *((struct in_addr *)&a[0]) ) ); 1152 if (mb < 0) 1153 printf(":%s", inet_ntoa( *((struct in_addr *)&a[1]) ) ); 1154 else if (mb < 32) 1155 printf("/%d", mb); 1156 } 1157 if (len > 1) 1158 printf(","); 1159 } 1160} 1161 1162/* 1163 * prints a MAC address/mask pair 1164 */ 1165static void 1166print_mac(uint8_t *addr, uint8_t *mask) 1167{ 1168 int l = contigmask(mask, 48); 1169 1170 if (l == 0) 1171 printf(" any"); 1172 else { 1173 printf(" %02x:%02x:%02x:%02x:%02x:%02x", 1174 addr[0], addr[1], addr[2], addr[3], addr[4], addr[5]); 1175 if (l == -1) 1176 printf("&%02x:%02x:%02x:%02x:%02x:%02x", 1177 mask[0], mask[1], mask[2], 1178 mask[3], mask[4], mask[5]); 1179 else if (l < 48) 1180 printf("/%d", l); 1181 } 1182} 1183 1184static void 1185fill_icmptypes(ipfw_insn_u32 *cmd, char *av) 1186{ 1187 uint8_t type; 1188 1189 cmd->d[0] = 0; 1190 while (*av) { 1191 if (*av == ',') 1192 av++; 1193 1194 type = strtoul(av, &av, 0); 1195 1196 if (*av != ',' && *av != '\0') 1197 errx(EX_DATAERR, "invalid ICMP type"); 1198 1199 if (type > 31) 1200 errx(EX_DATAERR, "ICMP type out of range"); 1201 1202 cmd->d[0] |= 1 << type; 1203 } 1204 cmd->o.opcode = O_ICMPTYPE; 1205 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32); 1206} 1207 1208static void 1209print_icmptypes(ipfw_insn_u32 *cmd) 1210{ 1211 int i; 1212 char sep= ' '; 1213 1214 printf(" icmptypes"); 1215 for (i = 0; i < 32; i++) { 1216 if ( (cmd->d[0] & (1 << (i))) == 0) 1217 continue; 1218 printf("%c%d", sep, i); 1219 sep = ','; 1220 } 1221} 1222 1223/* 1224 * Print the ip address contained in a command. 1225 */ 1226static void 1227print_ip6(ipfw_insn_ip6 *cmd, char const *s) 1228{ 1229 struct hostent *he = NULL; 1230 int len = F_LEN((ipfw_insn *) cmd) - 1; 1231 struct in6_addr *a = &(cmd->addr6); 1232 char trad[255]; 1233 1234 printf("%s%s ", cmd->o.len & F_NOT ? " not": "", s); 1235 1236 if (cmd->o.opcode == O_IP6_SRC_ME || cmd->o.opcode == O_IP6_DST_ME) { 1237 printf("me6"); 1238 return; 1239 } 1240 if (cmd->o.opcode == O_IP6) { 1241 printf(" ip6"); 1242 return; 1243 } 1244 1245 /* 1246 * len == 4 indicates a single IP, whereas lists of 1 or more 1247 * addr/mask pairs have len = (2n+1). We convert len to n so we 1248 * use that to count the number of entries. 1249 */ 1250 1251 for (len = len / 4; len > 0; len -= 2, a += 2) { 1252 int mb = /* mask length */ 1253 (cmd->o.opcode == O_IP6_SRC || cmd->o.opcode == O_IP6_DST) ? 1254 128 : contigmask((uint8_t *)&(a[1]), 128); 1255 1256 if (mb == 128 && co.do_resolv) 1257 he = gethostbyaddr((char *)a, sizeof(*a), AF_INET6); 1258 if (he != NULL) /* resolved to name */ 1259 printf("%s", he->h_name); 1260 else if (mb == 0) /* any */ 1261 printf("any"); 1262 else { /* numeric IP followed by some kind of mask */ 1263 if (inet_ntop(AF_INET6, a, trad, sizeof( trad ) ) == NULL) 1264 printf("Error ntop in print_ip6\n"); 1265 printf("%s", trad ); 1266 if (mb < 0) /* XXX not really legal... */ 1267 printf(":%s", 1268 inet_ntop(AF_INET6, &a[1], trad, sizeof(trad))); 1269 else if (mb < 128) 1270 printf("/%d", mb); 1271 } 1272 if (len > 2) 1273 printf(","); 1274 } 1275} 1276 1277static void 1278fill_icmp6types(ipfw_insn_icmp6 *cmd, char *av) 1279{ 1280 uint8_t type; 1281 1282 bzero(cmd, sizeof(*cmd)); 1283 while (*av) { 1284 if (*av == ',') 1285 av++; 1286 type = strtoul(av, &av, 0); 1287 if (*av != ',' && *av != '\0') 1288 errx(EX_DATAERR, "invalid ICMP6 type"); 1289 /* 1290 * XXX: shouldn't this be 0xFF? I can't see any reason why 1291 * we shouldn't be able to filter all possiable values 1292 * regardless of the ability of the rest of the kernel to do 1293 * anything useful with them. 1294 */ 1295 if (type > ICMP6_MAXTYPE) 1296 errx(EX_DATAERR, "ICMP6 type out of range"); 1297 cmd->d[type / 32] |= ( 1 << (type % 32)); 1298 } 1299 cmd->o.opcode = O_ICMP6TYPE; 1300 cmd->o.len |= F_INSN_SIZE(ipfw_insn_icmp6); 1301} 1302 1303 1304static void 1305print_icmp6types(ipfw_insn_u32 *cmd) 1306{ 1307 int i, j; 1308 char sep= ' '; 1309 1310 printf(" ip6 icmp6types"); 1311 for (i = 0; i < 7; i++) 1312 for (j=0; j < 32; ++j) { 1313 if ( (cmd->d[i] & (1 << (j))) == 0) 1314 continue; 1315 printf("%c%d", sep, (i*32 + j)); 1316 sep = ','; 1317 } 1318} 1319 1320static void 1321print_flow6id( ipfw_insn_u32 *cmd) 1322{ 1323 uint16_t i, limit = cmd->o.arg1; 1324 char sep = ','; 1325 1326 printf(" flow-id "); 1327 for( i=0; i < limit; ++i) { 1328 if (i == limit - 1) 1329 sep = ' '; 1330 printf("%d%c", cmd->d[i], sep); 1331 } 1332} 1333 1334/* structure and define for the extension header in ipv6 */ 1335static struct _s_x ext6hdrcodes[] = { 1336 { "frag", EXT_FRAGMENT }, 1337 { "hopopt", EXT_HOPOPTS }, 1338 { "route", EXT_ROUTING }, 1339 { "dstopt", EXT_DSTOPTS }, 1340 { "ah", EXT_AH }, 1341 { "esp", EXT_ESP }, 1342 { "rthdr0", EXT_RTHDR0 }, 1343 { "rthdr2", EXT_RTHDR2 }, 1344 { NULL, 0 } 1345}; 1346 1347/* fills command for the extension header filtering */ 1348static int 1349fill_ext6hdr( ipfw_insn *cmd, char *av) 1350{ 1351 int tok; 1352 char *s = av; 1353 1354 cmd->arg1 = 0; 1355 1356 while(s) { 1357 av = strsep( &s, ",") ; 1358 tok = match_token(ext6hdrcodes, av); 1359 switch (tok) { 1360 case EXT_FRAGMENT: 1361 cmd->arg1 |= EXT_FRAGMENT; 1362 break; 1363 1364 case EXT_HOPOPTS: 1365 cmd->arg1 |= EXT_HOPOPTS; 1366 break; 1367 1368 case EXT_ROUTING: 1369 cmd->arg1 |= EXT_ROUTING; 1370 break; 1371 1372 case EXT_DSTOPTS: 1373 cmd->arg1 |= EXT_DSTOPTS; 1374 break; 1375 1376 case EXT_AH: 1377 cmd->arg1 |= EXT_AH; 1378 break; 1379 1380 case EXT_ESP: 1381 cmd->arg1 |= EXT_ESP; 1382 break; 1383 1384 case EXT_RTHDR0: 1385 cmd->arg1 |= EXT_RTHDR0; 1386 break; 1387 1388 case EXT_RTHDR2: 1389 cmd->arg1 |= EXT_RTHDR2; 1390 break; 1391 1392 default: 1393 errx( EX_DATAERR, "invalid option for ipv6 exten header" ); 1394 break; 1395 } 1396 } 1397 if (cmd->arg1 == 0 ) 1398 return 0; 1399 cmd->opcode = O_EXT_HDR; 1400 cmd->len |= F_INSN_SIZE( ipfw_insn ); 1401 return 1; 1402} 1403 1404static void 1405print_ext6hdr( ipfw_insn *cmd ) 1406{ 1407 char sep = ' '; 1408 1409 printf(" extension header:"); 1410 if (cmd->arg1 & EXT_FRAGMENT ) { 1411 printf("%cfragmentation", sep); 1412 sep = ','; 1413 } 1414 if (cmd->arg1 & EXT_HOPOPTS ) { 1415 printf("%chop options", sep); 1416 sep = ','; 1417 } 1418 if (cmd->arg1 & EXT_ROUTING ) { 1419 printf("%crouting options", sep); 1420 sep = ','; 1421 } 1422 if (cmd->arg1 & EXT_RTHDR0 ) { 1423 printf("%crthdr0", sep); 1424 sep = ','; 1425 } 1426 if (cmd->arg1 & EXT_RTHDR2 ) { 1427 printf("%crthdr2", sep); 1428 sep = ','; 1429 } 1430 if (cmd->arg1 & EXT_DSTOPTS ) { 1431 printf("%cdestination options", sep); 1432 sep = ','; 1433 } 1434 if (cmd->arg1 & EXT_AH ) { 1435 printf("%cauthentication header", sep); 1436 sep = ','; 1437 } 1438 if (cmd->arg1 & EXT_ESP ) { 1439 printf("%cencapsulated security payload", sep); 1440 } 1441} 1442 1443/* 1444 * show_ipfw() prints the body of an ipfw rule. 1445 * Because the standard rule has at least proto src_ip dst_ip, we use 1446 * a helper function to produce these entries if not provided explicitly. 1447 * The first argument is the list of fields we have, the second is 1448 * the list of fields we want to be printed. 1449 * 1450 * Special cases if we have provided a MAC header: 1451 * + if the rule does not contain IP addresses/ports, do not print them; 1452 * + if the rule does not contain an IP proto, print "all" instead of "ip"; 1453 * 1454 * Once we have 'have_options', IP header fields are printed as options. 1455 */ 1456#define HAVE_PROTO 0x0001 1457#define HAVE_SRCIP 0x0002 1458#define HAVE_DSTIP 0x0004 1459#define HAVE_PROTO4 0x0008 1460#define HAVE_PROTO6 0x0010 1461#define HAVE_OPTIONS 0x8000 1462 1463#define HAVE_IP (HAVE_PROTO | HAVE_SRCIP | HAVE_DSTIP) 1464static void 1465show_prerequisites(int *flags, int want, int cmd __unused) 1466{ 1467 if (co.comment_only) 1468 return; 1469 if ( (*flags & HAVE_IP) == HAVE_IP) 1470 *flags |= HAVE_OPTIONS; 1471 1472 if ( !(*flags & HAVE_OPTIONS)) { 1473 if ( !(*flags & HAVE_PROTO) && (want & HAVE_PROTO)) { 1474 if ( (*flags & HAVE_PROTO4)) 1475 printf(" ip4"); 1476 else if ( (*flags & HAVE_PROTO6)) 1477 printf(" ip6"); 1478 else 1479 printf(" ip"); 1480 } 1481 if ( !(*flags & HAVE_SRCIP) && (want & HAVE_SRCIP)) 1482 printf(" from any"); 1483 if ( !(*flags & HAVE_DSTIP) && (want & HAVE_DSTIP)) 1484 printf(" to any"); 1485 } 1486 *flags |= want; 1487} 1488 1489static void 1490show_ipfw(struct ip_fw *rule, int pcwidth, int bcwidth) 1491{ 1492 static int twidth = 0; 1493 int l; 1494 ipfw_insn *cmd, *tagptr = NULL; 1495 const char *comment = NULL; /* ptr to comment if we have one */ 1496 int proto = 0; /* default */ 1497 int flags = 0; /* prerequisites */ 1498 ipfw_insn_log *logptr = NULL; /* set if we find an O_LOG */ 1499 ipfw_insn_altq *altqptr = NULL; /* set if we find an O_ALTQ */ 1500 int or_block = 0; /* we are in an or block */ 1501 uint32_t set_disable; 1502 1503 bcopy(&rule->next_rule, &set_disable, sizeof(set_disable)); 1504 1505 if (set_disable & (1 << rule->set)) { /* disabled */ 1506 if (!co.show_sets) 1507 return; 1508 else 1509 printf("# DISABLED "); 1510 } 1511 printf("%05u ", rule->rulenum); 1512 1513 if (pcwidth>0 || bcwidth>0) 1514 printf("%*llu %*llu ", pcwidth, align_uint64(&rule->pcnt), 1515 bcwidth, align_uint64(&rule->bcnt)); 1516 1517 if (co.do_time == 2) 1518 printf("%10u ", rule->timestamp); 1519 else if (co.do_time == 1) { 1520 char timestr[30]; 1521 time_t t = (time_t)0; 1522 1523 if (twidth == 0) { 1524 strcpy(timestr, ctime(&t)); 1525 *strchr(timestr, '\n') = '\0'; 1526 twidth = strlen(timestr); 1527 } 1528 if (rule->timestamp) { 1529 t = _long_to_time(rule->timestamp); 1530 1531 strcpy(timestr, ctime(&t)); 1532 *strchr(timestr, '\n') = '\0'; 1533 printf("%s ", timestr); 1534 } else { 1535 printf("%*s", twidth, " "); 1536 } 1537 } 1538 1539 if (co.show_sets) 1540 printf("set %d ", rule->set); 1541 1542 /* 1543 * print the optional "match probability" 1544 */ 1545 if (rule->cmd_len > 0) { 1546 cmd = rule->cmd ; 1547 if (cmd->opcode == O_PROB) { 1548 ipfw_insn_u32 *p = (ipfw_insn_u32 *)cmd; 1549 double d = 1.0 * p->d[0]; 1550 1551 d = (d / 0x7fffffff); 1552 printf("prob %f ", d); 1553 } 1554 } 1555 1556 /* 1557 * first print actions 1558 */ 1559 for (l = rule->cmd_len - rule->act_ofs, cmd = ACTION_PTR(rule); 1560 l > 0 ; l -= F_LEN(cmd), cmd += F_LEN(cmd)) { 1561 switch(cmd->opcode) { 1562 case O_CHECK_STATE: 1563 printf("check-state"); 1564 flags = HAVE_IP; /* avoid printing anything else */ 1565 break; 1566 1567 case O_ACCEPT: 1568 printf("allow"); 1569 break; 1570 1571 case O_COUNT: 1572 printf("count"); 1573 break; 1574 1575 case O_DENY: 1576 printf("deny"); 1577 break; 1578 1579 case O_REJECT: 1580 if (cmd->arg1 == ICMP_REJECT_RST) 1581 printf("reset"); 1582 else if (cmd->arg1 == ICMP_UNREACH_HOST) 1583 printf("reject"); 1584 else 1585 print_reject_code(cmd->arg1); 1586 break; 1587 1588 case O_UNREACH6: 1589 if (cmd->arg1 == ICMP6_UNREACH_RST) 1590 printf("reset6"); 1591 else 1592 print_unreach6_code(cmd->arg1); 1593 break; 1594 1595 case O_SKIPTO: 1596 PRINT_UINT_ARG("skipto ", cmd->arg1); 1597 break; 1598 1599 case O_PIPE: 1600 PRINT_UINT_ARG("pipe ", cmd->arg1); 1601 break; 1602 1603 case O_QUEUE: 1604 PRINT_UINT_ARG("queue ", cmd->arg1); 1605 break; 1606 1607 case O_DIVERT: 1608 PRINT_UINT_ARG("divert ", cmd->arg1); 1609 break; 1610 1611 case O_TEE: 1612 PRINT_UINT_ARG("tee ", cmd->arg1); 1613 break; 1614 1615 case O_NETGRAPH: 1616 PRINT_UINT_ARG("netgraph ", cmd->arg1); 1617 break; 1618 1619 case O_NGTEE: 1620 PRINT_UINT_ARG("ngtee ", cmd->arg1); 1621 break; 1622 1623 case O_FORWARD_IP: 1624 { 1625 ipfw_insn_sa *s = (ipfw_insn_sa *)cmd; 1626 1627 if (s->sa.sin_addr.s_addr == INADDR_ANY) { 1628 printf("fwd tablearg"); 1629 } else { 1630 printf("fwd %s", inet_ntoa(s->sa.sin_addr)); 1631 } 1632 if (s->sa.sin_port) 1633 printf(",%d", s->sa.sin_port); 1634 } 1635 break; 1636 1637 case O_LOG: /* O_LOG is printed last */ 1638 logptr = (ipfw_insn_log *)cmd; 1639 break; 1640 1641 case O_ALTQ: /* O_ALTQ is printed after O_LOG */ 1642 altqptr = (ipfw_insn_altq *)cmd; 1643 break; 1644 1645 case O_TAG: 1646 tagptr = cmd; 1647 break; 1648 1649 case O_NAT: 1650 PRINT_UINT_ARG("nat ", cmd->arg1); 1651 break; 1652 1653 case O_SETFIB: 1654 PRINT_UINT_ARG("setfib ", cmd->arg1); 1655 break; 1656 1657 default: 1658 printf("** unrecognized action %d len %d ", 1659 cmd->opcode, cmd->len); 1660 } 1661 } 1662 if (logptr) { 1663 if (logptr->max_log > 0) 1664 printf(" log logamount %d", logptr->max_log); 1665 else 1666 printf(" log"); 1667 } 1668 if (altqptr) { 1669 const char *qname; 1670 1671 qname = altq_qid_to_name(altqptr->qid); 1672 if (qname == NULL) 1673 printf(" altq ?<%u>", altqptr->qid); 1674 else 1675 printf(" altq %s", qname); 1676 } 1677 if (tagptr) { 1678 if (tagptr->len & F_NOT) 1679 PRINT_UINT_ARG(" untag ", tagptr->arg1); 1680 else 1681 PRINT_UINT_ARG(" tag ", tagptr->arg1); 1682 } 1683 1684 /* 1685 * then print the body. 1686 */ 1687 for (l = rule->act_ofs, cmd = rule->cmd ; 1688 l > 0 ; l -= F_LEN(cmd) , cmd += F_LEN(cmd)) { 1689 if ((cmd->len & F_OR) || (cmd->len & F_NOT)) 1690 continue; 1691 if (cmd->opcode == O_IP4) { 1692 flags |= HAVE_PROTO4; 1693 break; 1694 } else if (cmd->opcode == O_IP6) { 1695 flags |= HAVE_PROTO6; 1696 break; 1697 } 1698 } 1699 if (rule->_pad & 1) { /* empty rules before options */ 1700 if (!co.do_compact) { 1701 show_prerequisites(&flags, HAVE_PROTO, 0); 1702 printf(" from any to any"); 1703 } 1704 flags |= HAVE_IP | HAVE_OPTIONS; 1705 } 1706 1707 if (co.comment_only) 1708 comment = "..."; 1709 1710 for (l = rule->act_ofs, cmd = rule->cmd ; 1711 l > 0 ; l -= F_LEN(cmd) , cmd += F_LEN(cmd)) { 1712 /* useful alias */ 1713 ipfw_insn_u32 *cmd32 = (ipfw_insn_u32 *)cmd; 1714 1715 if (co.comment_only) { 1716 if (cmd->opcode != O_NOP) 1717 continue; 1718 printf(" // %s\n", (char *)(cmd + 1)); 1719 return; 1720 } 1721 1722 show_prerequisites(&flags, 0, cmd->opcode); 1723 1724 switch(cmd->opcode) { 1725 case O_PROB: 1726 break; /* done already */ 1727 1728 case O_PROBE_STATE: 1729 break; /* no need to print anything here */ 1730 1731 case O_IP_SRC: 1732 case O_IP_SRC_LOOKUP: 1733 case O_IP_SRC_MASK: 1734 case O_IP_SRC_ME: 1735 case O_IP_SRC_SET: 1736 show_prerequisites(&flags, HAVE_PROTO, 0); 1737 if (!(flags & HAVE_SRCIP)) 1738 printf(" from"); 1739 if ((cmd->len & F_OR) && !or_block) 1740 printf(" {"); 1741 print_ip((ipfw_insn_ip *)cmd, 1742 (flags & HAVE_OPTIONS) ? " src-ip" : ""); 1743 flags |= HAVE_SRCIP; 1744 break; 1745 1746 case O_IP_DST: 1747 case O_IP_DST_LOOKUP: 1748 case O_IP_DST_MASK: 1749 case O_IP_DST_ME: 1750 case O_IP_DST_SET: 1751 show_prerequisites(&flags, HAVE_PROTO|HAVE_SRCIP, 0); 1752 if (!(flags & HAVE_DSTIP)) 1753 printf(" to"); 1754 if ((cmd->len & F_OR) && !or_block) 1755 printf(" {"); 1756 print_ip((ipfw_insn_ip *)cmd, 1757 (flags & HAVE_OPTIONS) ? " dst-ip" : ""); 1758 flags |= HAVE_DSTIP; 1759 break; 1760 1761 case O_IP6_SRC: 1762 case O_IP6_SRC_MASK: 1763 case O_IP6_SRC_ME: 1764 show_prerequisites(&flags, HAVE_PROTO, 0); 1765 if (!(flags & HAVE_SRCIP)) 1766 printf(" from"); 1767 if ((cmd->len & F_OR) && !or_block) 1768 printf(" {"); 1769 print_ip6((ipfw_insn_ip6 *)cmd, 1770 (flags & HAVE_OPTIONS) ? " src-ip6" : ""); 1771 flags |= HAVE_SRCIP | HAVE_PROTO; 1772 break; 1773 1774 case O_IP6_DST: 1775 case O_IP6_DST_MASK: 1776 case O_IP6_DST_ME: 1777 show_prerequisites(&flags, HAVE_PROTO|HAVE_SRCIP, 0); 1778 if (!(flags & HAVE_DSTIP)) 1779 printf(" to"); 1780 if ((cmd->len & F_OR) && !or_block) 1781 printf(" {"); 1782 print_ip6((ipfw_insn_ip6 *)cmd, 1783 (flags & HAVE_OPTIONS) ? " dst-ip6" : ""); 1784 flags |= HAVE_DSTIP; 1785 break; 1786 1787 case O_FLOW6ID: 1788 print_flow6id( (ipfw_insn_u32 *) cmd ); 1789 flags |= HAVE_OPTIONS; 1790 break; 1791 1792 case O_IP_DSTPORT: 1793 show_prerequisites(&flags, HAVE_IP, 0); 1794 case O_IP_SRCPORT: 1795 show_prerequisites(&flags, HAVE_PROTO|HAVE_SRCIP, 0); 1796 if ((cmd->len & F_OR) && !or_block) 1797 printf(" {"); 1798 if (cmd->len & F_NOT) 1799 printf(" not"); 1800 print_newports((ipfw_insn_u16 *)cmd, proto, 1801 (flags & HAVE_OPTIONS) ? cmd->opcode : 0); 1802 break; 1803 1804 case O_PROTO: { 1805 struct protoent *pe = NULL; 1806 1807 if ((cmd->len & F_OR) && !or_block) 1808 printf(" {"); 1809 if (cmd->len & F_NOT) 1810 printf(" not"); 1811 proto = cmd->arg1; 1812 pe = getprotobynumber(cmd->arg1); 1813 if ((flags & (HAVE_PROTO4 | HAVE_PROTO6)) && 1814 !(flags & HAVE_PROTO)) 1815 show_prerequisites(&flags, 1816 HAVE_IP | HAVE_OPTIONS, 0); 1817 if (flags & HAVE_OPTIONS) 1818 printf(" proto"); 1819 if (pe) 1820 printf(" %s", pe->p_name); 1821 else 1822 printf(" %u", cmd->arg1); 1823 } 1824 flags |= HAVE_PROTO; 1825 break; 1826 1827 default: /*options ... */ 1828 if (!(cmd->len & (F_OR|F_NOT))) 1829 if (((cmd->opcode == O_IP6) && 1830 (flags & HAVE_PROTO6)) || 1831 ((cmd->opcode == O_IP4) && 1832 (flags & HAVE_PROTO4))) 1833 break; 1834 show_prerequisites(&flags, HAVE_IP | HAVE_OPTIONS, 0); 1835 if ((cmd->len & F_OR) && !or_block) 1836 printf(" {"); 1837 if (cmd->len & F_NOT && cmd->opcode != O_IN) 1838 printf(" not"); 1839 switch(cmd->opcode) { 1840 case O_MACADDR2: { 1841 ipfw_insn_mac *m = (ipfw_insn_mac *)cmd; 1842 1843 printf(" MAC"); 1844 print_mac(m->addr, m->mask); 1845 print_mac(m->addr + 6, m->mask + 6); 1846 } 1847 break; 1848 1849 case O_MAC_TYPE: 1850 print_newports((ipfw_insn_u16 *)cmd, 1851 IPPROTO_ETHERTYPE, cmd->opcode); 1852 break; 1853 1854 1855 case O_FRAG: 1856 printf(" frag"); 1857 break; 1858 1859 case O_FIB: 1860 printf(" fib %u", cmd->arg1 ); 1861 break; 1862 1863 case O_IN: 1864 printf(cmd->len & F_NOT ? " out" : " in"); 1865 break; 1866 1867 case O_DIVERTED: 1868 switch (cmd->arg1) { 1869 case 3: 1870 printf(" diverted"); 1871 break; 1872 case 1: 1873 printf(" diverted-loopback"); 1874 break; 1875 case 2: 1876 printf(" diverted-output"); 1877 break; 1878 default: 1879 printf(" diverted-?<%u>", cmd->arg1); 1880 break; 1881 } 1882 break; 1883 1884 case O_LAYER2: 1885 printf(" layer2"); 1886 break; 1887 case O_XMIT: 1888 case O_RECV: 1889 case O_VIA: 1890 { 1891 char const *s; 1892 ipfw_insn_if *cmdif = (ipfw_insn_if *)cmd; 1893 1894 if (cmd->opcode == O_XMIT) 1895 s = "xmit"; 1896 else if (cmd->opcode == O_RECV) 1897 s = "recv"; 1898 else /* if (cmd->opcode == O_VIA) */ 1899 s = "via"; 1900 if (cmdif->name[0] == '\0') 1901 printf(" %s %s", s, 1902 inet_ntoa(cmdif->p.ip)); 1903 else 1904 printf(" %s %s", s, cmdif->name); 1905 1906 break; 1907 } 1908 case O_IPID: 1909 if (F_LEN(cmd) == 1) 1910 printf(" ipid %u", cmd->arg1 ); 1911 else 1912 print_newports((ipfw_insn_u16 *)cmd, 0, 1913 O_IPID); 1914 break; 1915 1916 case O_IPTTL: 1917 if (F_LEN(cmd) == 1) 1918 printf(" ipttl %u", cmd->arg1 ); 1919 else 1920 print_newports((ipfw_insn_u16 *)cmd, 0, 1921 O_IPTTL); 1922 break; 1923 1924 case O_IPVER: 1925 printf(" ipver %u", cmd->arg1 ); 1926 break; 1927 1928 case O_IPPRECEDENCE: 1929 printf(" ipprecedence %u", (cmd->arg1) >> 5 ); 1930 break; 1931 1932 case O_IPLEN: 1933 if (F_LEN(cmd) == 1) 1934 printf(" iplen %u", cmd->arg1 ); 1935 else 1936 print_newports((ipfw_insn_u16 *)cmd, 0, 1937 O_IPLEN); 1938 break; 1939 1940 case O_IPOPT: 1941 print_flags("ipoptions", cmd, f_ipopts); 1942 break; 1943 1944 case O_IPTOS: 1945 print_flags("iptos", cmd, f_iptos); 1946 break; 1947 1948 case O_ICMPTYPE: 1949 print_icmptypes((ipfw_insn_u32 *)cmd); 1950 break; 1951 1952 case O_ESTAB: 1953 printf(" established"); 1954 break; 1955 1956 case O_TCPDATALEN: 1957 if (F_LEN(cmd) == 1) 1958 printf(" tcpdatalen %u", cmd->arg1 ); 1959 else 1960 print_newports((ipfw_insn_u16 *)cmd, 0, 1961 O_TCPDATALEN); 1962 break; 1963 1964 case O_TCPFLAGS: 1965 print_flags("tcpflags", cmd, f_tcpflags); 1966 break; 1967 1968 case O_TCPOPTS: 1969 print_flags("tcpoptions", cmd, f_tcpopts); 1970 break; 1971 1972 case O_TCPWIN: 1973 printf(" tcpwin %d", ntohs(cmd->arg1)); 1974 break; 1975 1976 case O_TCPACK: 1977 printf(" tcpack %d", ntohl(cmd32->d[0])); 1978 break; 1979 1980 case O_TCPSEQ: 1981 printf(" tcpseq %d", ntohl(cmd32->d[0])); 1982 break; 1983 1984 case O_UID: 1985 { 1986 struct passwd *pwd = getpwuid(cmd32->d[0]); 1987 1988 if (pwd) 1989 printf(" uid %s", pwd->pw_name); 1990 else 1991 printf(" uid %u", cmd32->d[0]); 1992 } 1993 break; 1994 1995 case O_GID: 1996 { 1997 struct group *grp = getgrgid(cmd32->d[0]); 1998 1999 if (grp) 2000 printf(" gid %s", grp->gr_name); 2001 else 2002 printf(" gid %u", cmd32->d[0]); 2003 } 2004 break; 2005 2006 case O_JAIL: 2007 printf(" jail %d", cmd32->d[0]); 2008 break; 2009 2010 case O_VERREVPATH: 2011 printf(" verrevpath"); 2012 break; 2013 2014 case O_VERSRCREACH: 2015 printf(" versrcreach"); 2016 break; 2017 2018 case O_ANTISPOOF: 2019 printf(" antispoof"); 2020 break; 2021 2022 case O_IPSEC: 2023 printf(" ipsec"); 2024 break; 2025 2026 case O_NOP: 2027 comment = (char *)(cmd + 1); 2028 break; 2029 2030 case O_KEEP_STATE: 2031 printf(" keep-state"); 2032 break; 2033 2034 case O_LIMIT: { 2035 struct _s_x *p = limit_masks; 2036 ipfw_insn_limit *c = (ipfw_insn_limit *)cmd; 2037 uint8_t x = c->limit_mask; 2038 char const *comma = " "; 2039 2040 printf(" limit"); 2041 for (; p->x != 0 ; p++) 2042 if ((x & p->x) == p->x) { 2043 x &= ~p->x; 2044 printf("%s%s", comma, p->s); 2045 comma = ","; 2046 } 2047 PRINT_UINT_ARG(" ", c->conn_limit); 2048 break; 2049 } 2050 2051 case O_IP6: 2052 printf(" ip6"); 2053 break; 2054 2055 case O_IP4: 2056 printf(" ip4"); 2057 break; 2058 2059 case O_ICMP6TYPE: 2060 print_icmp6types((ipfw_insn_u32 *)cmd); 2061 break; 2062 2063 case O_EXT_HDR: 2064 print_ext6hdr( (ipfw_insn *) cmd ); 2065 break; 2066 2067 case O_TAGGED: 2068 if (F_LEN(cmd) == 1) 2069 PRINT_UINT_ARG(" tagged ", cmd->arg1); 2070 else 2071 print_newports((ipfw_insn_u16 *)cmd, 0, 2072 O_TAGGED); 2073 break; 2074 2075 default: 2076 printf(" [opcode %d len %d]", 2077 cmd->opcode, cmd->len); 2078 } 2079 } 2080 if (cmd->len & F_OR) { 2081 printf(" or"); 2082 or_block = 1; 2083 } else if (or_block) { 2084 printf(" }"); 2085 or_block = 0; 2086 } 2087 } 2088 show_prerequisites(&flags, HAVE_IP, 0); 2089 if (comment) 2090 printf(" // %s", comment); 2091 printf("\n"); 2092} 2093 2094static void 2095show_dyn_ipfw(ipfw_dyn_rule *d, int pcwidth, int bcwidth) 2096{ 2097 struct protoent *pe; 2098 struct in_addr a; 2099 uint16_t rulenum; 2100 char buf[INET6_ADDRSTRLEN]; 2101 2102 if (!co.do_expired) { 2103 if (!d->expire && !(d->dyn_type == O_LIMIT_PARENT)) 2104 return; 2105 } 2106 bcopy(&d->rule, &rulenum, sizeof(rulenum)); 2107 printf("%05d", rulenum); 2108 if (pcwidth>0 || bcwidth>0) 2109 printf(" %*llu %*llu (%ds)", pcwidth, 2110 align_uint64(&d->pcnt), bcwidth, 2111 align_uint64(&d->bcnt), d->expire); 2112 switch (d->dyn_type) { 2113 case O_LIMIT_PARENT: 2114 printf(" PARENT %d", d->count); 2115 break; 2116 case O_LIMIT: 2117 printf(" LIMIT"); 2118 break; 2119 case O_KEEP_STATE: /* bidir, no mask */ 2120 printf(" STATE"); 2121 break; 2122 } 2123 2124 if ((pe = getprotobynumber(d->id.proto)) != NULL) 2125 printf(" %s", pe->p_name); 2126 else 2127 printf(" proto %u", d->id.proto); 2128 2129 if (d->id.addr_type == 4) { 2130 a.s_addr = htonl(d->id.src_ip); 2131 printf(" %s %d", inet_ntoa(a), d->id.src_port); 2132 2133 a.s_addr = htonl(d->id.dst_ip); 2134 printf(" <-> %s %d", inet_ntoa(a), d->id.dst_port); 2135 } else if (d->id.addr_type == 6) { 2136 printf(" %s %d", inet_ntop(AF_INET6, &d->id.src_ip6, buf, 2137 sizeof(buf)), d->id.src_port); 2138 printf(" <-> %s %d", inet_ntop(AF_INET6, &d->id.dst_ip6, buf, 2139 sizeof(buf)), d->id.dst_port); 2140 } else 2141 printf(" UNKNOWN <-> UNKNOWN\n"); 2142 2143 printf("\n"); 2144} 2145 2146static int 2147sort_q(const void *pa, const void *pb) 2148{ 2149 int rev = (co.do_sort < 0); 2150 int field = rev ? -co.do_sort : co.do_sort; 2151 long long res = 0; 2152 const struct dn_flow_queue *a = pa; 2153 const struct dn_flow_queue *b = pb; 2154 2155 switch (field) { 2156 case 1: /* pkts */ 2157 res = a->len - b->len; 2158 break; 2159 case 2: /* bytes */ 2160 res = a->len_bytes - b->len_bytes; 2161 break; 2162 2163 case 3: /* tot pkts */ 2164 res = a->tot_pkts - b->tot_pkts; 2165 break; 2166 2167 case 4: /* tot bytes */ 2168 res = a->tot_bytes - b->tot_bytes; 2169 break; 2170 } 2171 if (res < 0) 2172 res = -1; 2173 if (res > 0) 2174 res = 1; 2175 return (int)(rev ? res : -res); 2176} 2177 2178static void 2179list_queues(struct dn_flow_set *fs, struct dn_flow_queue *q) 2180{ 2181 int l; 2182 int index_printed, indexes = 0; 2183 char buff[255]; 2184 struct protoent *pe; 2185 2186 if (fs->rq_elements == 0) 2187 return; 2188 2189 if (co.do_sort != 0) 2190 heapsort(q, fs->rq_elements, sizeof *q, sort_q); 2191 2192 /* Print IPv4 flows */ 2193 index_printed = 0; 2194 for (l = 0; l < fs->rq_elements; l++) { 2195 struct in_addr ina; 2196 2197 /* XXX: Should check for IPv4 flows */ 2198 if (IS_IP6_FLOW_ID(&(q[l].id))) 2199 continue; 2200 2201 if (!index_printed) { 2202 index_printed = 1; 2203 if (indexes > 0) /* currently a no-op */ 2204 printf("\n"); 2205 indexes++; 2206 printf(" " 2207 "mask: 0x%02x 0x%08x/0x%04x -> 0x%08x/0x%04x\n", 2208 fs->flow_mask.proto, 2209 fs->flow_mask.src_ip, fs->flow_mask.src_port, 2210 fs->flow_mask.dst_ip, fs->flow_mask.dst_port); 2211 2212 printf("BKT Prot ___Source IP/port____ " 2213 "____Dest. IP/port____ " 2214 "Tot_pkt/bytes Pkt/Byte Drp\n"); 2215 } 2216 2217 printf("%3d ", q[l].hash_slot); 2218 pe = getprotobynumber(q[l].id.proto); 2219 if (pe) 2220 printf("%-4s ", pe->p_name); 2221 else 2222 printf("%4u ", q[l].id.proto); 2223 ina.s_addr = htonl(q[l].id.src_ip); 2224 printf("%15s/%-5d ", 2225 inet_ntoa(ina), q[l].id.src_port); 2226 ina.s_addr = htonl(q[l].id.dst_ip); 2227 printf("%15s/%-5d ", 2228 inet_ntoa(ina), q[l].id.dst_port); 2229 printf("%4qu %8qu %2u %4u %3u\n", 2230 q[l].tot_pkts, q[l].tot_bytes, 2231 q[l].len, q[l].len_bytes, q[l].drops); 2232 if (co.verbose) 2233 printf(" S %20qd F %20qd\n", 2234 q[l].S, q[l].F); 2235 } 2236 2237 /* Print IPv6 flows */ 2238 index_printed = 0; 2239 for (l = 0; l < fs->rq_elements; l++) { 2240 if (!IS_IP6_FLOW_ID(&(q[l].id))) 2241 continue; 2242 2243 if (!index_printed) { 2244 index_printed = 1; 2245 if (indexes > 0) 2246 printf("\n"); 2247 indexes++; 2248 printf("\n mask: proto: 0x%02x, flow_id: 0x%08x, ", 2249 fs->flow_mask.proto, fs->flow_mask.flow_id6); 2250 inet_ntop(AF_INET6, &(fs->flow_mask.src_ip6), 2251 buff, sizeof(buff)); 2252 printf("%s/0x%04x -> ", buff, fs->flow_mask.src_port); 2253 inet_ntop( AF_INET6, &(fs->flow_mask.dst_ip6), 2254 buff, sizeof(buff) ); 2255 printf("%s/0x%04x\n", buff, fs->flow_mask.dst_port); 2256 2257 printf("BKT ___Prot___ _flow-id_ " 2258 "______________Source IPv6/port_______________ " 2259 "_______________Dest. IPv6/port_______________ " 2260 "Tot_pkt/bytes Pkt/Byte Drp\n"); 2261 } 2262 printf("%3d ", q[l].hash_slot); 2263 pe = getprotobynumber(q[l].id.proto); 2264 if (pe != NULL) 2265 printf("%9s ", pe->p_name); 2266 else 2267 printf("%9u ", q[l].id.proto); 2268 printf("%7d %39s/%-5d ", q[l].id.flow_id6, 2269 inet_ntop(AF_INET6, &(q[l].id.src_ip6), buff, sizeof(buff)), 2270 q[l].id.src_port); 2271 printf(" %39s/%-5d ", 2272 inet_ntop(AF_INET6, &(q[l].id.dst_ip6), buff, sizeof(buff)), 2273 q[l].id.dst_port); 2274 printf(" %4qu %8qu %2u %4u %3u\n", 2275 q[l].tot_pkts, q[l].tot_bytes, 2276 q[l].len, q[l].len_bytes, q[l].drops); 2277 if (co.verbose) 2278 printf(" S %20qd F %20qd\n", q[l].S, q[l].F); 2279 } 2280} 2281 2282static void 2283print_flowset_parms(struct dn_flow_set *fs, char *prefix) 2284{ 2285 int l; 2286 char qs[30]; 2287 char plr[30]; 2288 char red[90]; /* Display RED parameters */ 2289 2290 l = fs->qsize; 2291 if (fs->flags_fs & DN_QSIZE_IS_BYTES) { 2292 if (l >= 8192) 2293 sprintf(qs, "%d KB", l / 1024); 2294 else 2295 sprintf(qs, "%d B", l); 2296 } else 2297 sprintf(qs, "%3d sl.", l); 2298 if (fs->plr) 2299 sprintf(plr, "plr %f", 1.0 * fs->plr / (double)(0x7fffffff)); 2300 else 2301 plr[0] = '\0'; 2302 if (fs->flags_fs & DN_IS_RED) /* RED parameters */ 2303 sprintf(red, 2304 "\n\t %cRED w_q %f min_th %d max_th %d max_p %f", 2305 (fs->flags_fs & DN_IS_GENTLE_RED) ? 'G' : ' ', 2306 1.0 * fs->w_q / (double)(1 << SCALE_RED), 2307 SCALE_VAL(fs->min_th), 2308 SCALE_VAL(fs->max_th), 2309 1.0 * fs->max_p / (double)(1 << SCALE_RED)); 2310 else 2311 sprintf(red, "droptail"); 2312 2313 printf("%s %s%s %d queues (%d buckets) %s\n", 2314 prefix, qs, plr, fs->rq_elements, fs->rq_size, red); 2315} 2316 2317static void 2318list_pipes(void *data, uint nbytes, int ac, char *av[]) 2319{ 2320 int rulenum; 2321 void *next = data; 2322 struct dn_pipe *p = (struct dn_pipe *) data; 2323 struct dn_flow_set *fs; 2324 struct dn_flow_queue *q; 2325 int l; 2326 2327 if (ac > 0) 2328 rulenum = strtoul(*av++, NULL, 10); 2329 else 2330 rulenum = 0; 2331 for (; nbytes >= sizeof *p; p = (struct dn_pipe *)next) { 2332 double b = p->bandwidth; 2333 char buf[30]; 2334 char prefix[80]; 2335 2336 if (SLIST_NEXT(p, next) != (struct dn_pipe *)DN_IS_PIPE) 2337 break; /* done with pipes, now queues */ 2338 2339 /* 2340 * compute length, as pipe have variable size 2341 */ 2342 l = sizeof(*p) + p->fs.rq_elements * sizeof(*q); 2343 next = (char *)p + l; 2344 nbytes -= l; 2345 2346 if ((rulenum != 0 && rulenum != p->pipe_nr) || co.do_pipe == 2) 2347 continue; 2348 2349 /* 2350 * Print rate (or clocking interface) 2351 */ 2352 if (p->if_name[0] != '\0') 2353 sprintf(buf, "%s", p->if_name); 2354 else if (b == 0) 2355 sprintf(buf, "unlimited"); 2356 else if (b >= 1000000) 2357 sprintf(buf, "%7.3f Mbit/s", b/1000000); 2358 else if (b >= 1000) 2359 sprintf(buf, "%7.3f Kbit/s", b/1000); 2360 else 2361 sprintf(buf, "%7.3f bit/s ", b); 2362 2363 sprintf(prefix, "%05d: %s %4d ms ", 2364 p->pipe_nr, buf, p->delay); 2365 print_flowset_parms(&(p->fs), prefix); 2366 if (co.verbose) 2367 printf(" V %20qd\n", p->V >> MY_M); 2368 2369 q = (struct dn_flow_queue *)(p+1); 2370 list_queues(&(p->fs), q); 2371 } 2372 for (fs = next; nbytes >= sizeof *fs; fs = next) { 2373 char prefix[80]; 2374 2375 if (SLIST_NEXT(fs, next) != (struct dn_flow_set *)DN_IS_QUEUE) 2376 break; 2377 l = sizeof(*fs) + fs->rq_elements * sizeof(*q); 2378 next = (char *)fs + l; 2379 nbytes -= l; 2380 2381 if (rulenum != 0 && ((rulenum != fs->fs_nr && co.do_pipe == 2) || 2382 (rulenum != fs->parent_nr && co.do_pipe == 1))) { 2383 continue; 2384 } 2385 2386 q = (struct dn_flow_queue *)(fs+1); 2387 sprintf(prefix, "q%05d: weight %d pipe %d ", 2388 fs->fs_nr, fs->weight, fs->parent_nr); 2389 print_flowset_parms(fs, prefix); 2390 list_queues(fs, q); 2391 } 2392} 2393 2394/* 2395 * This one handles all set-related commands 2396 * ipfw set { show | enable | disable } 2397 * ipfw set swap X Y 2398 * ipfw set move X to Y 2399 * ipfw set move rule X to Y 2400 */ 2401static void 2402sets_handler(int ac, char *av[]) 2403{ 2404 uint32_t set_disable, masks[2]; 2405 int i, nbytes; 2406 uint16_t rulenum; 2407 uint8_t cmd, new_set; 2408 2409 ac--; 2410 av++; 2411 2412 if (!ac) 2413 errx(EX_USAGE, "set needs command"); 2414 if (_substrcmp(*av, "show") == 0) { 2415 void *data; 2416 char const *msg; 2417 2418 nbytes = sizeof(struct ip_fw); 2419 data = safe_calloc(1, nbytes); 2420 if (do_cmd(IP_FW_GET, data, (uintptr_t)&nbytes) < 0) 2421 err(EX_OSERR, "getsockopt(IP_FW_GET)"); 2422 bcopy(&((struct ip_fw *)data)->next_rule, 2423 &set_disable, sizeof(set_disable)); 2424 2425 for (i = 0, msg = "disable" ; i < RESVD_SET; i++) 2426 if ((set_disable & (1<<i))) { 2427 printf("%s %d", msg, i); 2428 msg = ""; 2429 } 2430 msg = (set_disable) ? " enable" : "enable"; 2431 for (i = 0; i < RESVD_SET; i++) 2432 if (!(set_disable & (1<<i))) { 2433 printf("%s %d", msg, i); 2434 msg = ""; 2435 } 2436 printf("\n"); 2437 } else if (_substrcmp(*av, "swap") == 0) { 2438 ac--; av++; 2439 if (ac != 2) 2440 errx(EX_USAGE, "set swap needs 2 set numbers\n"); 2441 rulenum = atoi(av[0]); 2442 new_set = atoi(av[1]); 2443 if (!isdigit(*(av[0])) || rulenum > RESVD_SET) 2444 errx(EX_DATAERR, "invalid set number %s\n", av[0]); 2445 if (!isdigit(*(av[1])) || new_set > RESVD_SET) 2446 errx(EX_DATAERR, "invalid set number %s\n", av[1]); 2447 masks[0] = (4 << 24) | (new_set << 16) | (rulenum); 2448 i = do_cmd(IP_FW_DEL, masks, sizeof(uint32_t)); 2449 } else if (_substrcmp(*av, "move") == 0) { 2450 ac--; av++; 2451 if (ac && _substrcmp(*av, "rule") == 0) { 2452 cmd = 2; 2453 ac--; av++; 2454 } else 2455 cmd = 3; 2456 if (ac != 3 || _substrcmp(av[1], "to") != 0) 2457 errx(EX_USAGE, "syntax: set move [rule] X to Y\n"); 2458 rulenum = atoi(av[0]); 2459 new_set = atoi(av[2]); 2460 if (!isdigit(*(av[0])) || (cmd == 3 && rulenum > RESVD_SET) || 2461 (cmd == 2 && rulenum == IPFW_DEFAULT_RULE) ) 2462 errx(EX_DATAERR, "invalid source number %s\n", av[0]); 2463 if (!isdigit(*(av[2])) || new_set > RESVD_SET) 2464 errx(EX_DATAERR, "invalid dest. set %s\n", av[1]); 2465 masks[0] = (cmd << 24) | (new_set << 16) | (rulenum); 2466 i = do_cmd(IP_FW_DEL, masks, sizeof(uint32_t)); 2467 } else if (_substrcmp(*av, "disable") == 0 || 2468 _substrcmp(*av, "enable") == 0 ) { 2469 int which = _substrcmp(*av, "enable") == 0 ? 1 : 0; 2470 2471 ac--; av++; 2472 masks[0] = masks[1] = 0; 2473 2474 while (ac) { 2475 if (isdigit(**av)) { 2476 i = atoi(*av); 2477 if (i < 0 || i > RESVD_SET) 2478 errx(EX_DATAERR, 2479 "invalid set number %d\n", i); 2480 masks[which] |= (1<<i); 2481 } else if (_substrcmp(*av, "disable") == 0) 2482 which = 0; 2483 else if (_substrcmp(*av, "enable") == 0) 2484 which = 1; 2485 else 2486 errx(EX_DATAERR, 2487 "invalid set command %s\n", *av); 2488 av++; ac--; 2489 } 2490 if ( (masks[0] & masks[1]) != 0 ) 2491 errx(EX_DATAERR, 2492 "cannot enable and disable the same set\n"); 2493 2494 i = do_cmd(IP_FW_DEL, masks, sizeof(masks)); 2495 if (i) 2496 warn("set enable/disable: setsockopt(IP_FW_DEL)"); 2497 } else 2498 errx(EX_USAGE, "invalid set command %s\n", *av); 2499} 2500 2501static void 2502sysctl_handler(int ac, char *av[], int which) 2503{ 2504 ac--; 2505 av++; 2506 2507 if (ac == 0) { 2508 warnx("missing keyword to enable/disable\n"); 2509 } else if (_substrcmp(*av, "firewall") == 0) { 2510 sysctlbyname("net.inet.ip.fw.enable", NULL, 0, 2511 &which, sizeof(which)); 2512 } else if (_substrcmp(*av, "one_pass") == 0) { 2513 sysctlbyname("net.inet.ip.fw.one_pass", NULL, 0, 2514 &which, sizeof(which)); 2515 } else if (_substrcmp(*av, "debug") == 0) { 2516 sysctlbyname("net.inet.ip.fw.debug", NULL, 0, 2517 &which, sizeof(which)); 2518 } else if (_substrcmp(*av, "verbose") == 0) { 2519 sysctlbyname("net.inet.ip.fw.verbose", NULL, 0, 2520 &which, sizeof(which)); 2521 } else if (_substrcmp(*av, "dyn_keepalive") == 0) { 2522 sysctlbyname("net.inet.ip.fw.dyn_keepalive", NULL, 0, 2523 &which, sizeof(which)); 2524 } else if (_substrcmp(*av, "altq") == 0) { 2525 altq_set_enabled(which); 2526 } else { 2527 warnx("unrecognize enable/disable keyword: %s\n", *av); 2528 } 2529} 2530 2531static void 2532list(int ac, char *av[], int show_counters) 2533{ 2534 struct ip_fw *r; 2535 ipfw_dyn_rule *dynrules, *d; 2536 2537#define NEXT(r) ((struct ip_fw *)((char *)r + RULESIZE(r))) 2538 char *lim; 2539 void *data = NULL; 2540 int bcwidth, n, nbytes, nstat, ndyn, pcwidth, width; 2541 int exitval = EX_OK; 2542 int lac; 2543 char **lav; 2544 u_long rnum, last; 2545 char *endptr; 2546 int seen = 0; 2547 uint8_t set; 2548 2549 const int ocmd = co.do_pipe ? IP_DUMMYNET_GET : IP_FW_GET; 2550 int nalloc = 1024; /* start somewhere... */ 2551 2552 last = 0; 2553 2554 if (co.test_only) { 2555 fprintf(stderr, "Testing only, list disabled\n"); 2556 return; 2557 } 2558 2559 ac--; 2560 av++; 2561 2562 /* get rules or pipes from kernel, resizing array as necessary */ 2563 nbytes = nalloc; 2564 2565 while (nbytes >= nalloc) { 2566 nalloc = nalloc * 2 + 200; 2567 nbytes = nalloc; 2568 data = safe_realloc(data, nbytes); 2569 if (do_cmd(ocmd, data, (uintptr_t)&nbytes) < 0) 2570 err(EX_OSERR, "getsockopt(IP_%s_GET)", 2571 co.do_pipe ? "DUMMYNET" : "FW"); 2572 } 2573 2574 if (co.do_pipe) { 2575 list_pipes(data, nbytes, ac, av); 2576 goto done; 2577 } 2578 2579 /* 2580 * Count static rules. They have variable size so we 2581 * need to scan the list to count them. 2582 */ 2583 for (nstat = 1, r = data, lim = (char *)data + nbytes; 2584 r->rulenum < IPFW_DEFAULT_RULE && (char *)r < lim; 2585 ++nstat, r = NEXT(r) ) 2586 ; /* nothing */ 2587 2588 /* 2589 * Count dynamic rules. This is easier as they have 2590 * fixed size. 2591 */ 2592 r = NEXT(r); 2593 dynrules = (ipfw_dyn_rule *)r ; 2594 n = (char *)r - (char *)data; 2595 ndyn = (nbytes - n) / sizeof *dynrules; 2596 2597 /* if showing stats, figure out column widths ahead of time */ 2598 bcwidth = pcwidth = 0; 2599 if (show_counters) { 2600 for (n = 0, r = data; n < nstat; n++, r = NEXT(r)) { 2601 /* skip rules from another set */ 2602 if (co.use_set && r->set != co.use_set - 1) 2603 continue; 2604 2605 /* packet counter */ 2606 width = snprintf(NULL, 0, "%llu", 2607 align_uint64(&r->pcnt)); 2608 if (width > pcwidth) 2609 pcwidth = width; 2610 2611 /* byte counter */ 2612 width = snprintf(NULL, 0, "%llu", 2613 align_uint64(&r->bcnt)); 2614 if (width > bcwidth) 2615 bcwidth = width; 2616 } 2617 } 2618 if (co.do_dynamic && ndyn) { 2619 for (n = 0, d = dynrules; n < ndyn; n++, d++) { 2620 if (co.use_set) { 2621 /* skip rules from another set */ 2622 bcopy((char *)&d->rule + sizeof(uint16_t), 2623 &set, sizeof(uint8_t)); 2624 if (set != co.use_set - 1) 2625 continue; 2626 } 2627 width = snprintf(NULL, 0, "%llu", 2628 align_uint64(&d->pcnt)); 2629 if (width > pcwidth) 2630 pcwidth = width; 2631 2632 width = snprintf(NULL, 0, "%llu", 2633 align_uint64(&d->bcnt)); 2634 if (width > bcwidth) 2635 bcwidth = width; 2636 } 2637 } 2638 /* if no rule numbers were specified, list all rules */ 2639 if (ac == 0) { 2640 for (n = 0, r = data; n < nstat; n++, r = NEXT(r)) { 2641 if (co.use_set && r->set != co.use_set - 1) 2642 continue; 2643 show_ipfw(r, pcwidth, bcwidth); 2644 } 2645 2646 if (co.do_dynamic && ndyn) { 2647 printf("## Dynamic rules (%d):\n", ndyn); 2648 for (n = 0, d = dynrules; n < ndyn; n++, d++) { 2649 if (co.use_set) { 2650 bcopy((char *)&d->rule + sizeof(uint16_t), 2651 &set, sizeof(uint8_t)); 2652 if (set != co.use_set - 1) 2653 continue; 2654 } 2655 show_dyn_ipfw(d, pcwidth, bcwidth); 2656 } 2657 } 2658 goto done; 2659 } 2660 2661 /* display specific rules requested on command line */ 2662 2663 for (lac = ac, lav = av; lac != 0; lac--) { 2664 /* convert command line rule # */ 2665 last = rnum = strtoul(*lav++, &endptr, 10); 2666 if (*endptr == '-') 2667 last = strtoul(endptr+1, &endptr, 10); 2668 if (*endptr) { 2669 exitval = EX_USAGE; 2670 warnx("invalid rule number: %s", *(lav - 1)); 2671 continue; 2672 } 2673 for (n = seen = 0, r = data; n < nstat; n++, r = NEXT(r) ) { 2674 if (r->rulenum > last) 2675 break; 2676 if (co.use_set && r->set != co.use_set - 1) 2677 continue; 2678 if (r->rulenum >= rnum && r->rulenum <= last) { 2679 show_ipfw(r, pcwidth, bcwidth); 2680 seen = 1; 2681 } 2682 } 2683 if (!seen) { 2684 /* give precedence to other error(s) */ 2685 if (exitval == EX_OK) 2686 exitval = EX_UNAVAILABLE; 2687 warnx("rule %lu does not exist", rnum); 2688 } 2689 } 2690 2691 if (co.do_dynamic && ndyn) { 2692 printf("## Dynamic rules:\n"); 2693 for (lac = ac, lav = av; lac != 0; lac--) { 2694 last = rnum = strtoul(*lav++, &endptr, 10); 2695 if (*endptr == '-') 2696 last = strtoul(endptr+1, &endptr, 10); 2697 if (*endptr) 2698 /* already warned */ 2699 continue; 2700 for (n = 0, d = dynrules; n < ndyn; n++, d++) { 2701 uint16_t rulenum; 2702 2703 bcopy(&d->rule, &rulenum, sizeof(rulenum)); 2704 if (rulenum > rnum) 2705 break; 2706 if (co.use_set) { 2707 bcopy((char *)&d->rule + sizeof(uint16_t), 2708 &set, sizeof(uint8_t)); 2709 if (set != co.use_set - 1) 2710 continue; 2711 } 2712 if (r->rulenum >= rnum && r->rulenum <= last) 2713 show_dyn_ipfw(d, pcwidth, bcwidth); 2714 } 2715 } 2716 } 2717 2718 ac = 0; 2719 2720done: 2721 free(data); 2722 2723 if (exitval != EX_OK) 2724 exit(exitval); 2725#undef NEXT 2726} 2727 2728static void 2729show_usage(void) 2730{ 2731 fprintf(stderr, "usage: ipfw [options]\n" 2732"do \"ipfw -h\" or see ipfw manpage for details\n" 2733); 2734 exit(EX_USAGE); 2735} 2736 2737static void 2738help(void) 2739{ 2740 fprintf(stderr, 2741"ipfw syntax summary (but please do read the ipfw(8) manpage):\n" 2742"ipfw [-abcdefhnNqStTv] <command> where <command> is one of:\n" 2743"add [num] [set N] [prob x] RULE-BODY\n" 2744"{pipe|queue} N config PIPE-BODY\n" 2745"[pipe|queue] {zero|delete|show} [N{,N}]\n" 2746"nat N config {ip IPADDR|if IFNAME|log|deny_in|same_ports|unreg_only|reset|\n" 2747" reverse|proxy_only|redirect_addr linkspec|\n" 2748" redirect_port linkspec|redirect_proto linkspec}\n" 2749"set [disable N... enable N...] | move [rule] X to Y | swap X Y | show\n" 2750"set N {show|list|zero|resetlog|delete} [N{,N}] | flush\n" 2751"table N {add ip[/bits] [value] | delete ip[/bits] | flush | list}\n" 2752"table all {flush | list}\n" 2753"\n" 2754"RULE-BODY: check-state [PARAMS] | ACTION [PARAMS] ADDR [OPTION_LIST]\n" 2755"ACTION: check-state | allow | count | deny | unreach{,6} CODE |\n" 2756" skipto N | {divert|tee} PORT | forward ADDR |\n" 2757" pipe N | queue N | nat N | setfib FIB\n" 2758"PARAMS: [log [logamount LOGLIMIT]] [altq QUEUE_NAME]\n" 2759"ADDR: [ MAC dst src ether_type ] \n" 2760" [ ip from IPADDR [ PORT ] to IPADDR [ PORTLIST ] ]\n" 2761" [ ipv6|ip6 from IP6ADDR [ PORT ] to IP6ADDR [ PORTLIST ] ]\n" 2762"IPADDR: [not] { any | me | ip/bits{x,y,z} | table(t[,v]) | IPLIST }\n" 2763"IP6ADDR: [not] { any | me | me6 | ip6/bits | IP6LIST }\n" 2764"IP6LIST: { ip6 | ip6/bits }[,IP6LIST]\n" 2765"IPLIST: { ip | ip/bits | ip:mask }[,IPLIST]\n" 2766"OPTION_LIST: OPTION [OPTION_LIST]\n" 2767"OPTION: bridged | diverted | diverted-loopback | diverted-output |\n" 2768" {dst-ip|src-ip} IPADDR | {dst-ip6|src-ip6|dst-ipv6|src-ipv6} IP6ADDR |\n" 2769" {dst-port|src-port} LIST |\n" 2770" estab | frag | {gid|uid} N | icmptypes LIST | in | out | ipid LIST |\n" 2771" iplen LIST | ipoptions SPEC | ipprecedence | ipsec | iptos SPEC |\n" 2772" ipttl LIST | ipversion VER | keep-state | layer2 | limit ... |\n" 2773" icmp6types LIST | ext6hdr LIST | flow-id N[,N] | fib FIB |\n" 2774" mac ... | mac-type LIST | proto LIST | {recv|xmit|via} {IF|IPADDR} |\n" 2775" setup | {tcpack|tcpseq|tcpwin} NN | tcpflags SPEC | tcpoptions SPEC |\n" 2776" tcpdatalen LIST | verrevpath | versrcreach | antispoof\n" 2777); 2778exit(0); 2779} 2780 2781 2782static int 2783lookup_host (char *host, struct in_addr *ipaddr) 2784{ 2785 struct hostent *he; 2786 2787 if (!inet_aton(host, ipaddr)) { 2788 if ((he = gethostbyname(host)) == NULL) 2789 return(-1); 2790 *ipaddr = *(struct in_addr *)he->h_addr_list[0]; 2791 } 2792 return(0); 2793} 2794 2795/* 2796 * fills the addr and mask fields in the instruction as appropriate from av. 2797 * Update length as appropriate. 2798 * The following formats are allowed: 2799 * me returns O_IP_*_ME 2800 * 1.2.3.4 single IP address 2801 * 1.2.3.4:5.6.7.8 address:mask 2802 * 1.2.3.4/24 address/mask 2803 * 1.2.3.4/26{1,6,5,4,23} set of addresses in a subnet 2804 * We can have multiple comma-separated address/mask entries. 2805 */ 2806static void 2807fill_ip(ipfw_insn_ip *cmd, char *av) 2808{ 2809 int len = 0; 2810 uint32_t *d = ((ipfw_insn_u32 *)cmd)->d; 2811 2812 cmd->o.len &= ~F_LEN_MASK; /* zero len */ 2813 2814 if (_substrcmp(av, "any") == 0) 2815 return; 2816 2817 if (_substrcmp(av, "me") == 0) { 2818 cmd->o.len |= F_INSN_SIZE(ipfw_insn); 2819 return; 2820 } 2821 2822 if (strncmp(av, "table(", 6) == 0) { 2823 char *p = strchr(av + 6, ','); 2824 2825 if (p) 2826 *p++ = '\0'; 2827 cmd->o.opcode = O_IP_DST_LOOKUP; 2828 cmd->o.arg1 = strtoul(av + 6, NULL, 0); 2829 if (p) { 2830 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32); 2831 d[0] = strtoul(p, NULL, 0); 2832 } else 2833 cmd->o.len |= F_INSN_SIZE(ipfw_insn); 2834 return; 2835 } 2836 2837 while (av) { 2838 /* 2839 * After the address we can have '/' or ':' indicating a mask, 2840 * ',' indicating another address follows, '{' indicating a 2841 * set of addresses of unspecified size. 2842 */ 2843 char *t = NULL, *p = strpbrk(av, "/:,{"); 2844 int masklen; 2845 char md, nd = '\0'; 2846 2847 if (p) { 2848 md = *p; 2849 *p++ = '\0'; 2850 if ((t = strpbrk(p, ",{")) != NULL) { 2851 nd = *t; 2852 *t = '\0'; 2853 } 2854 } else 2855 md = '\0'; 2856 2857 if (lookup_host(av, (struct in_addr *)&d[0]) != 0) 2858 errx(EX_NOHOST, "hostname ``%s'' unknown", av); 2859 switch (md) { 2860 case ':': 2861 if (!inet_aton(p, (struct in_addr *)&d[1])) 2862 errx(EX_DATAERR, "bad netmask ``%s''", p); 2863 break; 2864 case '/': 2865 masklen = atoi(p); 2866 if (masklen == 0) 2867 d[1] = htonl(0); /* mask */ 2868 else if (masklen > 32) 2869 errx(EX_DATAERR, "bad width ``%s''", p); 2870 else 2871 d[1] = htonl(~0 << (32 - masklen)); 2872 break; 2873 case '{': /* no mask, assume /24 and put back the '{' */ 2874 d[1] = htonl(~0 << (32 - 24)); 2875 *(--p) = md; 2876 break; 2877 2878 case ',': /* single address plus continuation */ 2879 *(--p) = md; 2880 /* FALLTHROUGH */ 2881 case 0: /* initialization value */ 2882 default: 2883 d[1] = htonl(~0); /* force /32 */ 2884 break; 2885 } 2886 d[0] &= d[1]; /* mask base address with mask */ 2887 if (t) 2888 *t = nd; 2889 /* find next separator */ 2890 if (p) 2891 p = strpbrk(p, ",{"); 2892 if (p && *p == '{') { 2893 /* 2894 * We have a set of addresses. They are stored as follows: 2895 * arg1 is the set size (powers of 2, 2..256) 2896 * addr is the base address IN HOST FORMAT 2897 * mask.. is an array of arg1 bits (rounded up to 2898 * the next multiple of 32) with bits set 2899 * for each host in the map. 2900 */ 2901 uint32_t *map = (uint32_t *)&cmd->mask; 2902 int low, high; 2903 int i = contigmask((uint8_t *)&(d[1]), 32); 2904 2905 if (len > 0) 2906 errx(EX_DATAERR, "address set cannot be in a list"); 2907 if (i < 24 || i > 31) 2908 errx(EX_DATAERR, "invalid set with mask %d\n", i); 2909 cmd->o.arg1 = 1<<(32-i); /* map length */ 2910 d[0] = ntohl(d[0]); /* base addr in host format */ 2911 cmd->o.opcode = O_IP_DST_SET; /* default */ 2912 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32) + (cmd->o.arg1+31)/32; 2913 for (i = 0; i < (cmd->o.arg1+31)/32 ; i++) 2914 map[i] = 0; /* clear map */ 2915 2916 av = p + 1; 2917 low = d[0] & 0xff; 2918 high = low + cmd->o.arg1 - 1; 2919 /* 2920 * Here, i stores the previous value when we specify a range 2921 * of addresses within a mask, e.g. 45-63. i = -1 means we 2922 * have no previous value. 2923 */ 2924 i = -1; /* previous value in a range */ 2925 while (isdigit(*av)) { 2926 char *s; 2927 int a = strtol(av, &s, 0); 2928 2929 if (s == av) { /* no parameter */ 2930 if (*av != '}') 2931 errx(EX_DATAERR, "set not closed\n"); 2932 if (i != -1) 2933 errx(EX_DATAERR, "incomplete range %d-", i); 2934 break; 2935 } 2936 if (a < low || a > high) 2937 errx(EX_DATAERR, "addr %d out of range [%d-%d]\n", 2938 a, low, high); 2939 a -= low; 2940 if (i == -1) /* no previous in range */ 2941 i = a; 2942 else { /* check that range is valid */ 2943 if (i > a) 2944 errx(EX_DATAERR, "invalid range %d-%d", 2945 i+low, a+low); 2946 if (*s == '-') 2947 errx(EX_DATAERR, "double '-' in range"); 2948 } 2949 for (; i <= a; i++) 2950 map[i/32] |= 1<<(i & 31); 2951 i = -1; 2952 if (*s == '-') 2953 i = a; 2954 else if (*s == '}') 2955 break; 2956 av = s+1; 2957 } 2958 return; 2959 } 2960 av = p; 2961 if (av) /* then *av must be a ',' */ 2962 av++; 2963 2964 /* Check this entry */ 2965 if (d[1] == 0) { /* "any", specified as x.x.x.x/0 */ 2966 /* 2967 * 'any' turns the entire list into a NOP. 2968 * 'not any' never matches, so it is removed from the 2969 * list unless it is the only item, in which case we 2970 * report an error. 2971 */ 2972 if (cmd->o.len & F_NOT) { /* "not any" never matches */ 2973 if (av == NULL && len == 0) /* only this entry */ 2974 errx(EX_DATAERR, "not any never matches"); 2975 } 2976 /* else do nothing and skip this entry */ 2977 return; 2978 } 2979 /* A single IP can be stored in an optimized format */ 2980 if (d[1] == ~0 && av == NULL && len == 0) { 2981 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32); 2982 return; 2983 } 2984 len += 2; /* two words... */ 2985 d += 2; 2986 } /* end while */ 2987 if (len + 1 > F_LEN_MASK) 2988 errx(EX_DATAERR, "address list too long"); 2989 cmd->o.len |= len+1; 2990} 2991 2992 2993/* Try to find ipv6 address by hostname */ 2994static int 2995lookup_host6 (char *host, struct in6_addr *ip6addr) 2996{ 2997 struct hostent *he; 2998 2999 if (!inet_pton(AF_INET6, host, ip6addr)) { 3000 if ((he = gethostbyname2(host, AF_INET6)) == NULL) 3001 return(-1); 3002 memcpy(ip6addr, he->h_addr_list[0], sizeof( struct in6_addr)); 3003 } 3004 return(0); 3005} 3006 3007 3008/* n2mask sets n bits of the mask */ 3009static void 3010n2mask(struct in6_addr *mask, int n) 3011{ 3012 static int minimask[9] = 3013 { 0x00, 0x80, 0xc0, 0xe0, 0xf0, 0xf8, 0xfc, 0xfe, 0xff }; 3014 u_char *p; 3015 3016 memset(mask, 0, sizeof(struct in6_addr)); 3017 p = (u_char *) mask; 3018 for (; n > 0; p++, n -= 8) { 3019 if (n >= 8) 3020 *p = 0xff; 3021 else 3022 *p = minimask[n]; 3023 } 3024 return; 3025} 3026 3027 3028/* 3029 * fill the addr and mask fields in the instruction as appropriate from av. 3030 * Update length as appropriate. 3031 * The following formats are allowed: 3032 * any matches any IP6. Actually returns an empty instruction. 3033 * me returns O_IP6_*_ME 3034 * 3035 * 03f1::234:123:0342 single IP6 addres 3036 * 03f1::234:123:0342/24 address/mask 3037 * 03f1::234:123:0342/24,03f1::234:123:0343/ List of address 3038 * 3039 * Set of address (as in ipv6) not supported because ipv6 address 3040 * are typically random past the initial prefix. 3041 * Return 1 on success, 0 on failure. 3042 */ 3043static int 3044fill_ip6(ipfw_insn_ip6 *cmd, char *av) 3045{ 3046 int len = 0; 3047 struct in6_addr *d = &(cmd->addr6); 3048 /* 3049 * Needed for multiple address. 3050 * Note d[1] points to struct in6_add r mask6 of cmd 3051 */ 3052 3053 cmd->o.len &= ~F_LEN_MASK; /* zero len */ 3054 3055 if (strcmp(av, "any") == 0) 3056 return (1); 3057 3058 3059 if (strcmp(av, "me") == 0) { /* Set the data for "me" opt*/ 3060 cmd->o.len |= F_INSN_SIZE(ipfw_insn); 3061 return (1); 3062 } 3063 3064 if (strcmp(av, "me6") == 0) { /* Set the data for "me" opt*/ 3065 cmd->o.len |= F_INSN_SIZE(ipfw_insn); 3066 return (1); 3067 } 3068 3069 av = strdup(av); 3070 while (av) { 3071 /* 3072 * After the address we can have '/' indicating a mask, 3073 * or ',' indicating another address follows. 3074 */ 3075 3076 char *p; 3077 int masklen; 3078 char md = '\0'; 3079 3080 if ((p = strpbrk(av, "/,")) ) { 3081 md = *p; /* save the separator */ 3082 *p = '\0'; /* terminate address string */ 3083 p++; /* and skip past it */ 3084 } 3085 /* now p points to NULL, mask or next entry */ 3086 3087 /* lookup stores address in *d as a side effect */ 3088 if (lookup_host6(av, d) != 0) { 3089 /* XXX: failed. Free memory and go */ 3090 errx(EX_DATAERR, "bad address \"%s\"", av); 3091 } 3092 /* next, look at the mask, if any */ 3093 masklen = (md == '/') ? atoi(p) : 128; 3094 if (masklen > 128 || masklen < 0) 3095 errx(EX_DATAERR, "bad width \"%s\''", p); 3096 else 3097 n2mask(&d[1], masklen); 3098 3099 APPLY_MASK(d, &d[1]) /* mask base address with mask */ 3100 3101 /* find next separator */ 3102 3103 if (md == '/') { /* find separator past the mask */ 3104 p = strpbrk(p, ","); 3105 if (p != NULL) 3106 p++; 3107 } 3108 av = p; 3109 3110 /* Check this entry */ 3111 if (masklen == 0) { 3112 /* 3113 * 'any' turns the entire list into a NOP. 3114 * 'not any' never matches, so it is removed from the 3115 * list unless it is the only item, in which case we 3116 * report an error. 3117 */ 3118 if (cmd->o.len & F_NOT && av == NULL && len == 0) 3119 errx(EX_DATAERR, "not any never matches"); 3120 continue; 3121 } 3122 3123 /* 3124 * A single IP can be stored alone 3125 */ 3126 if (masklen == 128 && av == NULL && len == 0) { 3127 len = F_INSN_SIZE(struct in6_addr); 3128 break; 3129 } 3130 3131 /* Update length and pointer to arguments */ 3132 len += F_INSN_SIZE(struct in6_addr)*2; 3133 d += 2; 3134 } /* end while */ 3135 3136 /* 3137 * Total length of the command, remember that 1 is the size of 3138 * the base command. 3139 */ 3140 if (len + 1 > F_LEN_MASK) 3141 errx(EX_DATAERR, "address list too long"); 3142 cmd->o.len |= len+1; 3143 free(av); 3144 return (1); 3145} 3146 3147/* 3148 * fills command for ipv6 flow-id filtering 3149 * note that the 20 bit flow number is stored in a array of u_int32_t 3150 * it's supported lists of flow-id, so in the o.arg1 we store how many 3151 * additional flow-id we want to filter, the basic is 1 3152 */ 3153static void 3154fill_flow6( ipfw_insn_u32 *cmd, char *av ) 3155{ 3156 u_int32_t type; /* Current flow number */ 3157 u_int16_t nflow = 0; /* Current flow index */ 3158 char *s = av; 3159 cmd->d[0] = 0; /* Initializing the base number*/ 3160 3161 while (s) { 3162 av = strsep( &s, ",") ; 3163 type = strtoul(av, &av, 0); 3164 if (*av != ',' && *av != '\0') 3165 errx(EX_DATAERR, "invalid ipv6 flow number %s", av); 3166 if (type > 0xfffff) 3167 errx(EX_DATAERR, "flow number out of range %s", av); 3168 cmd->d[nflow] |= type; 3169 nflow++; 3170 } 3171 if( nflow > 0 ) { 3172 cmd->o.opcode = O_FLOW6ID; 3173 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32) + nflow; 3174 cmd->o.arg1 = nflow; 3175 } 3176 else { 3177 errx(EX_DATAERR, "invalid ipv6 flow number %s", av); 3178 } 3179} 3180 3181static ipfw_insn * 3182add_srcip6(ipfw_insn *cmd, char *av) 3183{ 3184 3185 fill_ip6((ipfw_insn_ip6 *)cmd, av); 3186 if (F_LEN(cmd) == 0) { /* any */ 3187 } else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn)) { /* "me" */ 3188 cmd->opcode = O_IP6_SRC_ME; 3189 } else if (F_LEN(cmd) == 3190 (F_INSN_SIZE(struct in6_addr) + F_INSN_SIZE(ipfw_insn))) { 3191 /* single IP, no mask*/ 3192 cmd->opcode = O_IP6_SRC; 3193 } else { /* addr/mask opt */ 3194 cmd->opcode = O_IP6_SRC_MASK; 3195 } 3196 return cmd; 3197} 3198 3199static ipfw_insn * 3200add_dstip6(ipfw_insn *cmd, char *av) 3201{ 3202 3203 fill_ip6((ipfw_insn_ip6 *)cmd, av); 3204 if (F_LEN(cmd) == 0) { /* any */ 3205 } else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn)) { /* "me" */ 3206 cmd->opcode = O_IP6_DST_ME; 3207 } else if (F_LEN(cmd) == 3208 (F_INSN_SIZE(struct in6_addr) + F_INSN_SIZE(ipfw_insn))) { 3209 /* single IP, no mask*/ 3210 cmd->opcode = O_IP6_DST; 3211 } else { /* addr/mask opt */ 3212 cmd->opcode = O_IP6_DST_MASK; 3213 } 3214 return cmd; 3215} 3216 3217 3218/* 3219 * helper function to process a set of flags and set bits in the 3220 * appropriate masks. 3221 */ 3222static void 3223fill_flags(ipfw_insn *cmd, enum ipfw_opcodes opcode, 3224 struct _s_x *flags, char *p) 3225{ 3226 uint8_t set=0, clear=0; 3227 3228 while (p && *p) { 3229 char *q; /* points to the separator */ 3230 int val; 3231 uint8_t *which; /* mask we are working on */ 3232 3233 if (*p == '!') { 3234 p++; 3235 which = &clear; 3236 } else 3237 which = &set; 3238 q = strchr(p, ','); 3239 if (q) 3240 *q++ = '\0'; 3241 val = match_token(flags, p); 3242 if (val <= 0) 3243 errx(EX_DATAERR, "invalid flag %s", p); 3244 *which |= (uint8_t)val; 3245 p = q; 3246 } 3247 cmd->opcode = opcode; 3248 cmd->len = (cmd->len & (F_NOT | F_OR)) | 1; 3249 cmd->arg1 = (set & 0xff) | ( (clear & 0xff) << 8); 3250} 3251 3252 3253static void 3254delete(int ac, char *av[]) 3255{ 3256 uint32_t rulenum; 3257 struct dn_pipe p; 3258 int i; 3259 int exitval = EX_OK; 3260 int do_set = 0; 3261 3262 memset(&p, 0, sizeof p); 3263 3264 av++; ac--; 3265 NEED1("missing rule specification"); 3266 if (ac > 0 && _substrcmp(*av, "set") == 0) { 3267 /* Do not allow using the following syntax: 3268 * ipfw set N delete set M 3269 */ 3270 if (co.use_set) 3271 errx(EX_DATAERR, "invalid syntax"); 3272 do_set = 1; /* delete set */ 3273 ac--; av++; 3274 } 3275 3276 /* Rule number */ 3277 while (ac && isdigit(**av)) { 3278 i = atoi(*av); av++; ac--; 3279 if (co.do_nat) { 3280 exitval = do_cmd(IP_FW_NAT_DEL, &i, sizeof i); 3281 if (exitval) { 3282 exitval = EX_UNAVAILABLE; 3283 warn("rule %u not available", i); 3284 } 3285 } else if (co.do_pipe) { 3286 if (co.do_pipe == 1) 3287 p.pipe_nr = i; 3288 else 3289 p.fs.fs_nr = i; 3290 i = do_cmd(IP_DUMMYNET_DEL, &p, sizeof p); 3291 if (i) { 3292 exitval = 1; 3293 warn("rule %u: setsockopt(IP_DUMMYNET_DEL)", 3294 co.do_pipe == 1 ? p.pipe_nr : p.fs.fs_nr); 3295 } 3296 } else { 3297 if (co.use_set) 3298 rulenum = (i & 0xffff) | (5 << 24) | 3299 ((co.use_set - 1) << 16); 3300 else 3301 rulenum = (i & 0xffff) | (do_set << 24); 3302 i = do_cmd(IP_FW_DEL, &rulenum, sizeof rulenum); 3303 if (i) { 3304 exitval = EX_UNAVAILABLE; 3305 warn("rule %u: setsockopt(IP_FW_DEL)", 3306 rulenum); 3307 } 3308 } 3309 } 3310 if (exitval != EX_OK) 3311 exit(exitval); 3312} 3313 3314 3315/* 3316 * fill the interface structure. We do not check the name as we can 3317 * create interfaces dynamically, so checking them at insert time 3318 * makes relatively little sense. 3319 * Interface names containing '*', '?', or '[' are assumed to be shell 3320 * patterns which match interfaces. 3321 */ 3322static void 3323fill_iface(ipfw_insn_if *cmd, char *arg) 3324{ 3325 cmd->name[0] = '\0'; 3326 cmd->o.len |= F_INSN_SIZE(ipfw_insn_if); 3327 3328 /* Parse the interface or address */ 3329 if (strcmp(arg, "any") == 0) 3330 cmd->o.len = 0; /* effectively ignore this command */ 3331 else if (!isdigit(*arg)) { 3332 strlcpy(cmd->name, arg, sizeof(cmd->name)); 3333 cmd->p.glob = strpbrk(arg, "*?[") != NULL ? 1 : 0; 3334 } else if (!inet_aton(arg, &cmd->p.ip)) 3335 errx(EX_DATAERR, "bad ip address ``%s''", arg); 3336} 3337 3338/* 3339 * Search for interface with name "ifn", and fill n accordingly: 3340 * 3341 * n->ip ip address of interface "ifn" 3342 * n->if_name copy of interface name "ifn" 3343 */ 3344static void 3345set_addr_dynamic(const char *ifn, struct cfg_nat *n) 3346{ 3347 size_t needed; 3348 int mib[6]; 3349 char *buf, *lim, *next; 3350 struct if_msghdr *ifm; 3351 struct ifa_msghdr *ifam; 3352 struct sockaddr_dl *sdl; 3353 struct sockaddr_in *sin; 3354 int ifIndex, ifMTU; 3355 3356 mib[0] = CTL_NET; 3357 mib[1] = PF_ROUTE; 3358 mib[2] = 0; 3359 mib[3] = AF_INET; 3360 mib[4] = NET_RT_IFLIST; 3361 mib[5] = 0; 3362/* 3363 * Get interface data. 3364 */ 3365 if (sysctl(mib, 6, NULL, &needed, NULL, 0) == -1) 3366 err(1, "iflist-sysctl-estimate"); 3367 buf = safe_calloc(1, needed); 3368 if (sysctl(mib, 6, buf, &needed, NULL, 0) == -1) 3369 err(1, "iflist-sysctl-get"); 3370 lim = buf + needed; 3371/* 3372 * Loop through interfaces until one with 3373 * given name is found. This is done to 3374 * find correct interface index for routing 3375 * message processing. 3376 */ 3377 ifIndex = 0; 3378 next = buf; 3379 while (next < lim) { 3380 ifm = (struct if_msghdr *)next; 3381 next += ifm->ifm_msglen; 3382 if (ifm->ifm_version != RTM_VERSION) { 3383 if (co.verbose) 3384 warnx("routing message version %d " 3385 "not understood", ifm->ifm_version); 3386 continue; 3387 } 3388 if (ifm->ifm_type == RTM_IFINFO) { 3389 sdl = (struct sockaddr_dl *)(ifm + 1); 3390 if (strlen(ifn) == sdl->sdl_nlen && 3391 strncmp(ifn, sdl->sdl_data, sdl->sdl_nlen) == 0) { 3392 ifIndex = ifm->ifm_index; 3393 ifMTU = ifm->ifm_data.ifi_mtu; 3394 break; 3395 } 3396 } 3397 } 3398 if (!ifIndex) 3399 errx(1, "unknown interface name %s", ifn); 3400/* 3401 * Get interface address. 3402 */ 3403 sin = NULL; 3404 while (next < lim) { 3405 ifam = (struct ifa_msghdr *)next; 3406 next += ifam->ifam_msglen; 3407 if (ifam->ifam_version != RTM_VERSION) { 3408 if (co.verbose) 3409 warnx("routing message version %d " 3410 "not understood", ifam->ifam_version); 3411 continue; 3412 } 3413 if (ifam->ifam_type != RTM_NEWADDR) 3414 break; 3415 if (ifam->ifam_addrs & RTA_IFA) { 3416 int i; 3417 char *cp = (char *)(ifam + 1); 3418 3419 for (i = 1; i < RTA_IFA; i <<= 1) { 3420 if (ifam->ifam_addrs & i) 3421 cp += SA_SIZE((struct sockaddr *)cp); 3422 } 3423 if (((struct sockaddr *)cp)->sa_family == AF_INET) { 3424 sin = (struct sockaddr_in *)cp; 3425 break; 3426 } 3427 } 3428 } 3429 if (sin == NULL) 3430 errx(1, "%s: cannot get interface address", ifn); 3431 3432 n->ip = sin->sin_addr; 3433 strncpy(n->if_name, ifn, IF_NAMESIZE); 3434 3435 free(buf); 3436} 3437 3438/* 3439 * XXX - The following functions, macros and definitions come from natd.c: 3440 * it would be better to move them outside natd.c, in a file 3441 * (redirect_support.[ch]?) shared by ipfw and natd, but for now i can live 3442 * with it. 3443 */ 3444 3445/* 3446 * Definition of a port range, and macros to deal with values. 3447 * FORMAT: HI 16-bits == first port in range, 0 == all ports. 3448 * LO 16-bits == number of ports in range 3449 * NOTES: - Port values are not stored in network byte order. 3450 */ 3451 3452#define port_range u_long 3453 3454#define GETLOPORT(x) ((x) >> 0x10) 3455#define GETNUMPORTS(x) ((x) & 0x0000ffff) 3456#define GETHIPORT(x) (GETLOPORT((x)) + GETNUMPORTS((x))) 3457 3458/* Set y to be the low-port value in port_range variable x. */ 3459#define SETLOPORT(x,y) ((x) = ((x) & 0x0000ffff) | ((y) << 0x10)) 3460 3461/* Set y to be the number of ports in port_range variable x. */ 3462#define SETNUMPORTS(x,y) ((x) = ((x) & 0xffff0000) | (y)) 3463 3464static void 3465StrToAddr (const char* str, struct in_addr* addr) 3466{ 3467 struct hostent* hp; 3468 3469 if (inet_aton (str, addr)) 3470 return; 3471 3472 hp = gethostbyname (str); 3473 if (!hp) 3474 errx (1, "unknown host %s", str); 3475 3476 memcpy (addr, hp->h_addr, sizeof (struct in_addr)); 3477} 3478 3479static int 3480StrToPortRange (const char* str, const char* proto, port_range *portRange) 3481{ 3482 char* sep; 3483 struct servent* sp; 3484 char* end; 3485 u_short loPort; 3486 u_short hiPort; 3487 3488 /* First see if this is a service, return corresponding port if so. */ 3489 sp = getservbyname (str,proto); 3490 if (sp) { 3491 SETLOPORT(*portRange, ntohs(sp->s_port)); 3492 SETNUMPORTS(*portRange, 1); 3493 return 0; 3494 } 3495 3496 /* Not a service, see if it's a single port or port range. */ 3497 sep = strchr (str, '-'); 3498 if (sep == NULL) { 3499 SETLOPORT(*portRange, strtol(str, &end, 10)); 3500 if (end != str) { 3501 /* Single port. */ 3502 SETNUMPORTS(*portRange, 1); 3503 return 0; 3504 } 3505 3506 /* Error in port range field. */ 3507 errx (EX_DATAERR, "%s/%s: unknown service", str, proto); 3508 } 3509 3510 /* Port range, get the values and sanity check. */ 3511 sscanf (str, "%hu-%hu", &loPort, &hiPort); 3512 SETLOPORT(*portRange, loPort); 3513 SETNUMPORTS(*portRange, 0); /* Error by default */ 3514 if (loPort <= hiPort) 3515 SETNUMPORTS(*portRange, hiPort - loPort + 1); 3516 3517 if (GETNUMPORTS(*portRange) == 0) 3518 errx (EX_DATAERR, "invalid port range %s", str); 3519 3520 return 0; 3521} 3522 3523static int 3524StrToProto (const char* str) 3525{ 3526 if (!strcmp (str, "tcp")) 3527 return IPPROTO_TCP; 3528 3529 if (!strcmp (str, "udp")) 3530 return IPPROTO_UDP; 3531 3532 errx (EX_DATAERR, "unknown protocol %s. Expected tcp or udp", str); 3533} 3534 3535static int 3536StrToAddrAndPortRange (const char* str, struct in_addr* addr, char* proto, 3537 port_range *portRange) 3538{ 3539 char* ptr; 3540 3541 ptr = strchr (str, ':'); 3542 if (!ptr) 3543 errx (EX_DATAERR, "%s is missing port number", str); 3544 3545 *ptr = '\0'; 3546 ++ptr; 3547 3548 StrToAddr (str, addr); 3549 return StrToPortRange (ptr, proto, portRange); 3550} 3551 3552/* End of stuff taken from natd.c. */ 3553 3554#define INC_ARGCV() do { \ 3555 (*_av)++; \ 3556 (*_ac)--; \ 3557 av = *_av; \ 3558 ac = *_ac; \ 3559} while(0) 3560 3561/* 3562 * The next 3 functions add support for the addr, port and proto redirect and 3563 * their logic is loosely based on SetupAddressRedirect(), SetupPortRedirect() 3564 * and SetupProtoRedirect() from natd.c. 3565 * 3566 * Every setup_* function fills at least one redirect entry 3567 * (struct cfg_redir) and zero or more server pool entry (struct cfg_spool) 3568 * in buf. 3569 * 3570 * The format of data in buf is: 3571 * 3572 * 3573 * cfg_nat cfg_redir cfg_spool ...... cfg_spool 3574 * 3575 * ------------------------------------- ------------ 3576 * | | .....X ... | | | | ..... 3577 * ------------------------------------- ...... ------------ 3578 * ^ 3579 * spool_cnt n=0 ...... n=(X-1) 3580 * 3581 * len points to the amount of available space in buf 3582 * space counts the memory consumed by every function 3583 * 3584 * XXX - Every function get all the argv params so it 3585 * has to check, in optional parameters, that the next 3586 * args is a valid option for the redir entry and not 3587 * another token. Only redir_port and redir_proto are 3588 * affected by this. 3589 */ 3590 3591static int 3592setup_redir_addr(char *spool_buf, int len, 3593 int *_ac, char ***_av) 3594{ 3595 char **av, *sep; /* Token separator. */ 3596 /* Temporary buffer used to hold server pool ip's. */ 3597 char tmp_spool_buf[NAT_BUF_LEN]; 3598 int ac, space, lsnat; 3599 struct cfg_redir *r; 3600 struct cfg_spool *tmp; 3601 3602 av = *_av; 3603 ac = *_ac; 3604 space = 0; 3605 lsnat = 0; 3606 if (len >= SOF_REDIR) { 3607 r = (struct cfg_redir *)spool_buf; 3608 /* Skip cfg_redir at beginning of buf. */ 3609 spool_buf = &spool_buf[SOF_REDIR]; 3610 space = SOF_REDIR; 3611 len -= SOF_REDIR; 3612 } else 3613 goto nospace; 3614 r->mode = REDIR_ADDR; 3615 /* Extract local address. */ 3616 if (ac == 0) 3617 errx(EX_DATAERR, "redirect_addr: missing local address"); 3618 sep = strchr(*av, ','); 3619 if (sep) { /* LSNAT redirection syntax. */ 3620 r->laddr.s_addr = INADDR_NONE; 3621 /* Preserve av, copy spool servers to tmp_spool_buf. */ 3622 strncpy(tmp_spool_buf, *av, strlen(*av)+1); 3623 lsnat = 1; 3624 } else 3625 StrToAddr(*av, &r->laddr); 3626 INC_ARGCV(); 3627 3628 /* Extract public address. */ 3629 if (ac == 0) 3630 errx(EX_DATAERR, "redirect_addr: missing public address"); 3631 StrToAddr(*av, &r->paddr); 3632 INC_ARGCV(); 3633 3634 /* Setup LSNAT server pool. */ 3635 if (sep) { 3636 sep = strtok(tmp_spool_buf, ","); 3637 while (sep != NULL) { 3638 tmp = (struct cfg_spool *)spool_buf; 3639 if (len < SOF_SPOOL) 3640 goto nospace; 3641 len -= SOF_SPOOL; 3642 space += SOF_SPOOL; 3643 StrToAddr(sep, &tmp->addr); 3644 tmp->port = ~0; 3645 r->spool_cnt++; 3646 /* Point to the next possible cfg_spool. */ 3647 spool_buf = &spool_buf[SOF_SPOOL]; 3648 sep = strtok(NULL, ","); 3649 } 3650 } 3651 return(space); 3652nospace: 3653 errx(EX_DATAERR, "redirect_addr: buf is too small\n"); 3654} 3655 3656static int 3657setup_redir_port(char *spool_buf, int len, 3658 int *_ac, char ***_av) 3659{ 3660 char **av, *sep, *protoName; 3661 char tmp_spool_buf[NAT_BUF_LEN]; 3662 int ac, space, lsnat; 3663 struct cfg_redir *r; 3664 struct cfg_spool *tmp; 3665 u_short numLocalPorts; 3666 port_range portRange; 3667 3668 av = *_av; 3669 ac = *_ac; 3670 space = 0; 3671 lsnat = 0; 3672 numLocalPorts = 0; 3673 3674 if (len >= SOF_REDIR) { 3675 r = (struct cfg_redir *)spool_buf; 3676 /* Skip cfg_redir at beginning of buf. */ 3677 spool_buf = &spool_buf[SOF_REDIR]; 3678 space = SOF_REDIR; 3679 len -= SOF_REDIR; 3680 } else 3681 goto nospace; 3682 r->mode = REDIR_PORT; 3683 /* 3684 * Extract protocol. 3685 */ 3686 if (ac == 0) 3687 errx (EX_DATAERR, "redirect_port: missing protocol"); 3688 r->proto = StrToProto(*av); 3689 protoName = *av; 3690 INC_ARGCV(); 3691 3692 /* 3693 * Extract local address. 3694 */ 3695 if (ac == 0) 3696 errx (EX_DATAERR, "redirect_port: missing local address"); 3697 3698 sep = strchr(*av, ','); 3699 /* LSNAT redirection syntax. */ 3700 if (sep) { 3701 r->laddr.s_addr = INADDR_NONE; 3702 r->lport = ~0; 3703 numLocalPorts = 1; 3704 /* Preserve av, copy spool servers to tmp_spool_buf. */ 3705 strncpy(tmp_spool_buf, *av, strlen(*av)+1); 3706 lsnat = 1; 3707 } else { 3708 if (StrToAddrAndPortRange (*av, &r->laddr, protoName, 3709 &portRange) != 0) 3710 errx(EX_DATAERR, "redirect_port:" 3711 "invalid local port range"); 3712 3713 r->lport = GETLOPORT(portRange); 3714 numLocalPorts = GETNUMPORTS(portRange); 3715 } 3716 INC_ARGCV(); 3717 3718 /* 3719 * Extract public port and optionally address. 3720 */ 3721 if (ac == 0) 3722 errx (EX_DATAERR, "redirect_port: missing public port"); 3723 3724 sep = strchr (*av, ':'); 3725 if (sep) { 3726 if (StrToAddrAndPortRange (*av, &r->paddr, protoName, 3727 &portRange) != 0) 3728 errx(EX_DATAERR, "redirect_port:" 3729 "invalid public port range"); 3730 } else { 3731 r->paddr.s_addr = INADDR_ANY; 3732 if (StrToPortRange (*av, protoName, &portRange) != 0) 3733 errx(EX_DATAERR, "redirect_port:" 3734 "invalid public port range"); 3735 } 3736 3737 r->pport = GETLOPORT(portRange); 3738 r->pport_cnt = GETNUMPORTS(portRange); 3739 INC_ARGCV(); 3740 3741 /* 3742 * Extract remote address and optionally port. 3743 */ 3744 /* 3745 * NB: isalpha(**av) => we've to check that next parameter is really an 3746 * option for this redirect entry, else stop here processing arg[cv]. 3747 */ 3748 if (ac != 0 && !isalpha(**av)) { 3749 sep = strchr (*av, ':'); 3750 if (sep) { 3751 if (StrToAddrAndPortRange (*av, &r->raddr, protoName, 3752 &portRange) != 0) 3753 errx(EX_DATAERR, "redirect_port:" 3754 "invalid remote port range"); 3755 } else { 3756 SETLOPORT(portRange, 0); 3757 SETNUMPORTS(portRange, 1); 3758 StrToAddr (*av, &r->raddr); 3759 } 3760 INC_ARGCV(); 3761 } else { 3762 SETLOPORT(portRange, 0); 3763 SETNUMPORTS(portRange, 1); 3764 r->raddr.s_addr = INADDR_ANY; 3765 } 3766 r->rport = GETLOPORT(portRange); 3767 r->rport_cnt = GETNUMPORTS(portRange); 3768 3769 /* 3770 * Make sure port ranges match up, then add the redirect ports. 3771 */ 3772 if (numLocalPorts != r->pport_cnt) 3773 errx(EX_DATAERR, "redirect_port:" 3774 "port ranges must be equal in size"); 3775 3776 /* Remote port range is allowed to be '0' which means all ports. */ 3777 if (r->rport_cnt != numLocalPorts && 3778 (r->rport_cnt != 1 || r->rport != 0)) 3779 errx(EX_DATAERR, "redirect_port: remote port must" 3780 "be 0 or equal to local port range in size"); 3781 3782 /* 3783 * Setup LSNAT server pool. 3784 */ 3785 if (lsnat) { 3786 sep = strtok(tmp_spool_buf, ","); 3787 while (sep != NULL) { 3788 tmp = (struct cfg_spool *)spool_buf; 3789 if (len < SOF_SPOOL) 3790 goto nospace; 3791 len -= SOF_SPOOL; 3792 space += SOF_SPOOL; 3793 if (StrToAddrAndPortRange(sep, &tmp->addr, protoName, 3794 &portRange) != 0) 3795 errx(EX_DATAERR, "redirect_port:" 3796 "invalid local port range"); 3797 if (GETNUMPORTS(portRange) != 1) 3798 errx(EX_DATAERR, "redirect_port: local port" 3799 "must be single in this context"); 3800 tmp->port = GETLOPORT(portRange); 3801 r->spool_cnt++; 3802 /* Point to the next possible cfg_spool. */ 3803 spool_buf = &spool_buf[SOF_SPOOL]; 3804 sep = strtok(NULL, ","); 3805 } 3806 } 3807 return (space); 3808nospace: 3809 errx(EX_DATAERR, "redirect_port: buf is too small\n"); 3810} 3811 3812static int 3813setup_redir_proto(char *spool_buf, int len, 3814 int *_ac, char ***_av) 3815{ 3816 char **av; 3817 int ac, space; 3818 struct protoent *protoent; 3819 struct cfg_redir *r; 3820 3821 av = *_av; 3822 ac = *_ac; 3823 if (len >= SOF_REDIR) { 3824 r = (struct cfg_redir *)spool_buf; 3825 /* Skip cfg_redir at beginning of buf. */ 3826 spool_buf = &spool_buf[SOF_REDIR]; 3827 space = SOF_REDIR; 3828 len -= SOF_REDIR; 3829 } else 3830 goto nospace; 3831 r->mode = REDIR_PROTO; 3832 /* 3833 * Extract protocol. 3834 */ 3835 if (ac == 0) 3836 errx(EX_DATAERR, "redirect_proto: missing protocol"); 3837 3838 protoent = getprotobyname(*av); 3839 if (protoent == NULL) 3840 errx(EX_DATAERR, "redirect_proto: unknown protocol %s", *av); 3841 else 3842 r->proto = protoent->p_proto; 3843 3844 INC_ARGCV(); 3845 3846 /* 3847 * Extract local address. 3848 */ 3849 if (ac == 0) 3850 errx(EX_DATAERR, "redirect_proto: missing local address"); 3851 else 3852 StrToAddr(*av, &r->laddr); 3853 3854 INC_ARGCV(); 3855 3856 /* 3857 * Extract optional public address. 3858 */ 3859 if (ac == 0) { 3860 r->paddr.s_addr = INADDR_ANY; 3861 r->raddr.s_addr = INADDR_ANY; 3862 } else { 3863 /* see above in setup_redir_port() */ 3864 if (!isalpha(**av)) { 3865 StrToAddr(*av, &r->paddr); 3866 INC_ARGCV(); 3867 3868 /* 3869 * Extract optional remote address. 3870 */ 3871 /* see above in setup_redir_port() */ 3872 if (ac!=0 && !isalpha(**av)) { 3873 StrToAddr(*av, &r->raddr); 3874 INC_ARGCV(); 3875 } 3876 } 3877 } 3878 return (space); 3879nospace: 3880 errx(EX_DATAERR, "redirect_proto: buf is too small\n"); 3881} 3882 3883static void 3884show_nat(int ac, char **av); 3885 3886static void 3887print_nat_config(unsigned char *buf) 3888{ 3889 struct cfg_nat *n; 3890 int i, cnt, flag, off; 3891 struct cfg_redir *t; 3892 struct cfg_spool *s; 3893 struct protoent *p; 3894 3895 n = (struct cfg_nat *)buf; 3896 flag = 1; 3897 off = sizeof(*n); 3898 printf("ipfw nat %u config", n->id); 3899 if (strlen(n->if_name) != 0) 3900 printf(" if %s", n->if_name); 3901 else if (n->ip.s_addr != 0) 3902 printf(" ip %s", inet_ntoa(n->ip)); 3903 while (n->mode != 0) { 3904 if (n->mode & PKT_ALIAS_LOG) { 3905 printf(" log"); 3906 n->mode &= ~PKT_ALIAS_LOG; 3907 } else if (n->mode & PKT_ALIAS_DENY_INCOMING) { 3908 printf(" deny_in"); 3909 n->mode &= ~PKT_ALIAS_DENY_INCOMING; 3910 } else if (n->mode & PKT_ALIAS_SAME_PORTS) { 3911 printf(" same_ports"); 3912 n->mode &= ~PKT_ALIAS_SAME_PORTS; 3913 } else if (n->mode & PKT_ALIAS_UNREGISTERED_ONLY) { 3914 printf(" unreg_only"); 3915 n->mode &= ~PKT_ALIAS_UNREGISTERED_ONLY; 3916 } else if (n->mode & PKT_ALIAS_RESET_ON_ADDR_CHANGE) { 3917 printf(" reset"); 3918 n->mode &= ~PKT_ALIAS_RESET_ON_ADDR_CHANGE; 3919 } else if (n->mode & PKT_ALIAS_REVERSE) { 3920 printf(" reverse"); 3921 n->mode &= ~PKT_ALIAS_REVERSE; 3922 } else if (n->mode & PKT_ALIAS_PROXY_ONLY) { 3923 printf(" proxy_only"); 3924 n->mode &= ~PKT_ALIAS_PROXY_ONLY; 3925 } 3926 } 3927 /* Print all the redirect's data configuration. */ 3928 for (cnt = 0; cnt < n->redir_cnt; cnt++) { 3929 t = (struct cfg_redir *)&buf[off]; 3930 off += SOF_REDIR; 3931 switch (t->mode) { 3932 case REDIR_ADDR: 3933 printf(" redirect_addr"); 3934 if (t->spool_cnt == 0) 3935 printf(" %s", inet_ntoa(t->laddr)); 3936 else 3937 for (i = 0; i < t->spool_cnt; i++) { 3938 s = (struct cfg_spool *)&buf[off]; 3939 if (i) 3940 printf(","); 3941 else 3942 printf(" "); 3943 printf("%s", inet_ntoa(s->addr)); 3944 off += SOF_SPOOL; 3945 } 3946 printf(" %s", inet_ntoa(t->paddr)); 3947 break; 3948 case REDIR_PORT: 3949 p = getprotobynumber(t->proto); 3950 printf(" redirect_port %s ", p->p_name); 3951 if (!t->spool_cnt) { 3952 printf("%s:%u", inet_ntoa(t->laddr), t->lport); 3953 if (t->pport_cnt > 1) 3954 printf("-%u", t->lport + 3955 t->pport_cnt - 1); 3956 } else 3957 for (i=0; i < t->spool_cnt; i++) { 3958 s = (struct cfg_spool *)&buf[off]; 3959 if (i) 3960 printf(","); 3961 printf("%s:%u", inet_ntoa(s->addr), 3962 s->port); 3963 off += SOF_SPOOL; 3964 } 3965 3966 printf(" "); 3967 if (t->paddr.s_addr) 3968 printf("%s:", inet_ntoa(t->paddr)); 3969 printf("%u", t->pport); 3970 if (!t->spool_cnt && t->pport_cnt > 1) 3971 printf("-%u", t->pport + t->pport_cnt - 1); 3972 3973 if (t->raddr.s_addr) { 3974 printf(" %s", inet_ntoa(t->raddr)); 3975 if (t->rport) { 3976 printf(":%u", t->rport); 3977 if (!t->spool_cnt && t->rport_cnt > 1) 3978 printf("-%u", t->rport + 3979 t->rport_cnt - 1); 3980 } 3981 } 3982 break; 3983 case REDIR_PROTO: 3984 p = getprotobynumber(t->proto); 3985 printf(" redirect_proto %s %s", p->p_name, 3986 inet_ntoa(t->laddr)); 3987 if (t->paddr.s_addr != 0) { 3988 printf(" %s", inet_ntoa(t->paddr)); 3989 if (t->raddr.s_addr) 3990 printf(" %s", inet_ntoa(t->raddr)); 3991 } 3992 break; 3993 default: 3994 errx(EX_DATAERR, "unknown redir mode"); 3995 break; 3996 } 3997 } 3998 printf("\n"); 3999} 4000 4001static void 4002config_nat(int ac, char **av) 4003{ 4004 struct cfg_nat *n; /* Nat instance configuration. */ 4005 int i, len, off, tok; 4006 char *id, buf[NAT_BUF_LEN]; /* Buffer for serialized data. */ 4007 4008 len = NAT_BUF_LEN; 4009 /* Offset in buf: save space for n at the beginning. */ 4010 off = sizeof(*n); 4011 memset(buf, 0, sizeof(buf)); 4012 n = (struct cfg_nat *)buf; 4013 4014 av++; ac--; 4015 /* Nat id. */ 4016 if (ac && isdigit(**av)) { 4017 id = *av; 4018 i = atoi(*av); 4019 ac--; av++; 4020 n->id = i; 4021 } else 4022 errx(EX_DATAERR, "missing nat id"); 4023 if (ac == 0) 4024 errx(EX_DATAERR, "missing option"); 4025 4026 while (ac > 0) { 4027 tok = match_token(nat_params, *av); 4028 ac--; av++; 4029 switch (tok) { 4030 case TOK_IP: 4031 if (ac == 0) 4032 errx(EX_DATAERR, "missing option"); 4033 if (!inet_aton(av[0], &(n->ip))) 4034 errx(EX_DATAERR, "bad ip address ``%s''", 4035 av[0]); 4036 ac--; av++; 4037 break; 4038 case TOK_IF: 4039 if (ac == 0) 4040 errx(EX_DATAERR, "missing option"); 4041 set_addr_dynamic(av[0], n); 4042 ac--; av++; 4043 break; 4044 case TOK_ALOG: 4045 n->mode |= PKT_ALIAS_LOG; 4046 break; 4047 case TOK_DENY_INC: 4048 n->mode |= PKT_ALIAS_DENY_INCOMING; 4049 break; 4050 case TOK_SAME_PORTS: 4051 n->mode |= PKT_ALIAS_SAME_PORTS; 4052 break; 4053 case TOK_UNREG_ONLY: 4054 n->mode |= PKT_ALIAS_UNREGISTERED_ONLY; 4055 break; 4056 case TOK_RESET_ADDR: 4057 n->mode |= PKT_ALIAS_RESET_ON_ADDR_CHANGE; 4058 break; 4059 case TOK_ALIAS_REV: 4060 n->mode |= PKT_ALIAS_REVERSE; 4061 break; 4062 case TOK_PROXY_ONLY: 4063 n->mode |= PKT_ALIAS_PROXY_ONLY; 4064 break; 4065 /* 4066 * All the setup_redir_* functions work directly in the final 4067 * buffer, see above for details. 4068 */ 4069 case TOK_REDIR_ADDR: 4070 case TOK_REDIR_PORT: 4071 case TOK_REDIR_PROTO: 4072 switch (tok) { 4073 case TOK_REDIR_ADDR: 4074 i = setup_redir_addr(&buf[off], len, &ac, &av); 4075 break; 4076 case TOK_REDIR_PORT: 4077 i = setup_redir_port(&buf[off], len, &ac, &av); 4078 break; 4079 case TOK_REDIR_PROTO: 4080 i = setup_redir_proto(&buf[off], len, &ac, &av); 4081 break; 4082 } 4083 n->redir_cnt++; 4084 off += i; 4085 len -= i; 4086 break; 4087 default: 4088 errx(EX_DATAERR, "unrecognised option ``%s''", av[-1]); 4089 } 4090 } 4091 4092 i = do_cmd(IP_FW_NAT_CFG, buf, off); 4093 if (i) 4094 err(1, "setsockopt(%s)", "IP_FW_NAT_CFG"); 4095 4096 if (!co.do_quiet) { 4097 /* After every modification, we show the resultant rule. */ 4098 int _ac = 3; 4099 char *_av[] = {"show", "config", id}; 4100 show_nat(_ac, _av); 4101 } 4102} 4103 4104static void 4105config_pipe(int ac, char **av) 4106{ 4107 struct dn_pipe p; 4108 int i; 4109 char *end; 4110 void *par = NULL; 4111 4112 memset(&p, 0, sizeof p); 4113 4114 av++; ac--; 4115 /* Pipe number */ 4116 if (ac && isdigit(**av)) { 4117 i = atoi(*av); av++; ac--; 4118 if (co.do_pipe == 1) 4119 p.pipe_nr = i; 4120 else 4121 p.fs.fs_nr = i; 4122 } 4123 while (ac > 0) { 4124 double d; 4125 int tok = match_token(dummynet_params, *av); 4126 ac--; av++; 4127 4128 switch(tok) { 4129 case TOK_NOERROR: 4130 p.fs.flags_fs |= DN_NOERROR; 4131 break; 4132 4133 case TOK_PLR: 4134 NEED1("plr needs argument 0..1\n"); 4135 d = strtod(av[0], NULL); 4136 if (d > 1) 4137 d = 1; 4138 else if (d < 0) 4139 d = 0; 4140 p.fs.plr = (int)(d*0x7fffffff); 4141 ac--; av++; 4142 break; 4143 4144 case TOK_QUEUE: 4145 NEED1("queue needs queue size\n"); 4146 end = NULL; 4147 p.fs.qsize = strtoul(av[0], &end, 0); 4148 if (*end == 'K' || *end == 'k') { 4149 p.fs.flags_fs |= DN_QSIZE_IS_BYTES; 4150 p.fs.qsize *= 1024; 4151 } else if (*end == 'B' || 4152 _substrcmp2(end, "by", "bytes") == 0) { 4153 p.fs.flags_fs |= DN_QSIZE_IS_BYTES; 4154 } 4155 ac--; av++; 4156 break; 4157 4158 case TOK_BUCKETS: 4159 NEED1("buckets needs argument\n"); 4160 p.fs.rq_size = strtoul(av[0], NULL, 0); 4161 ac--; av++; 4162 break; 4163 4164 case TOK_MASK: 4165 NEED1("mask needs mask specifier\n"); 4166 /* 4167 * per-flow queue, mask is dst_ip, dst_port, 4168 * src_ip, src_port, proto measured in bits 4169 */ 4170 par = NULL; 4171 4172 bzero(&p.fs.flow_mask, sizeof(p.fs.flow_mask)); 4173 end = NULL; 4174 4175 while (ac >= 1) { 4176 uint32_t *p32 = NULL; 4177 uint16_t *p16 = NULL; 4178 uint32_t *p20 = NULL; 4179 struct in6_addr *pa6 = NULL; 4180 uint32_t a; 4181 4182 tok = match_token(dummynet_params, *av); 4183 ac--; av++; 4184 switch(tok) { 4185 case TOK_ALL: 4186 /* 4187 * special case, all bits significant 4188 */ 4189 p.fs.flow_mask.dst_ip = ~0; 4190 p.fs.flow_mask.src_ip = ~0; 4191 p.fs.flow_mask.dst_port = ~0; 4192 p.fs.flow_mask.src_port = ~0; 4193 p.fs.flow_mask.proto = ~0; 4194 n2mask(&(p.fs.flow_mask.dst_ip6), 128); 4195 n2mask(&(p.fs.flow_mask.src_ip6), 128); 4196 p.fs.flow_mask.flow_id6 = ~0; 4197 p.fs.flags_fs |= DN_HAVE_FLOW_MASK; 4198 goto end_mask; 4199 4200 case TOK_DSTIP: 4201 p32 = &p.fs.flow_mask.dst_ip; 4202 break; 4203 4204 case TOK_SRCIP: 4205 p32 = &p.fs.flow_mask.src_ip; 4206 break; 4207 4208 case TOK_DSTIP6: 4209 pa6 = &(p.fs.flow_mask.dst_ip6); 4210 break; 4211 4212 case TOK_SRCIP6: 4213 pa6 = &(p.fs.flow_mask.src_ip6); 4214 break; 4215 4216 case TOK_FLOWID: 4217 p20 = &p.fs.flow_mask.flow_id6; 4218 break; 4219 4220 case TOK_DSTPORT: 4221 p16 = &p.fs.flow_mask.dst_port; 4222 break; 4223 4224 case TOK_SRCPORT: 4225 p16 = &p.fs.flow_mask.src_port; 4226 break; 4227 4228 case TOK_PROTO: 4229 break; 4230 4231 default: 4232 ac++; av--; /* backtrack */ 4233 goto end_mask; 4234 } 4235 if (ac < 1) 4236 errx(EX_USAGE, "mask: value missing"); 4237 if (*av[0] == '/') { 4238 a = strtoul(av[0]+1, &end, 0); 4239 if (pa6 == NULL) 4240 a = (a == 32) ? ~0 : (1 << a) - 1; 4241 } else 4242 a = strtoul(av[0], &end, 0); 4243 if (p32 != NULL) 4244 *p32 = a; 4245 else if (p16 != NULL) { 4246 if (a > 0xFFFF) 4247 errx(EX_DATAERR, 4248 "port mask must be 16 bit"); 4249 *p16 = (uint16_t)a; 4250 } else if (p20 != NULL) { 4251 if (a > 0xfffff) 4252 errx(EX_DATAERR, 4253 "flow_id mask must be 20 bit"); 4254 *p20 = (uint32_t)a; 4255 } else if (pa6 != NULL) { 4256 if (a > 128) 4257 errx(EX_DATAERR, 4258 "in6addr invalid mask len"); 4259 else 4260 n2mask(pa6, a); 4261 } else { 4262 if (a > 0xFF) 4263 errx(EX_DATAERR, 4264 "proto mask must be 8 bit"); 4265 p.fs.flow_mask.proto = (uint8_t)a; 4266 } 4267 if (a != 0) 4268 p.fs.flags_fs |= DN_HAVE_FLOW_MASK; 4269 ac--; av++; 4270 } /* end while, config masks */ 4271end_mask: 4272 break; 4273 4274 case TOK_RED: 4275 case TOK_GRED: 4276 NEED1("red/gred needs w_q/min_th/max_th/max_p\n"); 4277 p.fs.flags_fs |= DN_IS_RED; 4278 if (tok == TOK_GRED) 4279 p.fs.flags_fs |= DN_IS_GENTLE_RED; 4280 /* 4281 * the format for parameters is w_q/min_th/max_th/max_p 4282 */ 4283 if ((end = strsep(&av[0], "/"))) { 4284 double w_q = strtod(end, NULL); 4285 if (w_q > 1 || w_q <= 0) 4286 errx(EX_DATAERR, "0 < w_q <= 1"); 4287 p.fs.w_q = (int) (w_q * (1 << SCALE_RED)); 4288 } 4289 if ((end = strsep(&av[0], "/"))) { 4290 p.fs.min_th = strtoul(end, &end, 0); 4291 if (*end == 'K' || *end == 'k') 4292 p.fs.min_th *= 1024; 4293 } 4294 if ((end = strsep(&av[0], "/"))) { 4295 p.fs.max_th = strtoul(end, &end, 0); 4296 if (*end == 'K' || *end == 'k') 4297 p.fs.max_th *= 1024; 4298 } 4299 if ((end = strsep(&av[0], "/"))) { 4300 double max_p = strtod(end, NULL); 4301 if (max_p > 1 || max_p <= 0) 4302 errx(EX_DATAERR, "0 < max_p <= 1"); 4303 p.fs.max_p = (int)(max_p * (1 << SCALE_RED)); 4304 } 4305 ac--; av++; 4306 break; 4307 4308 case TOK_DROPTAIL: 4309 p.fs.flags_fs &= ~(DN_IS_RED|DN_IS_GENTLE_RED); 4310 break; 4311 4312 case TOK_BW: 4313 NEED1("bw needs bandwidth or interface\n"); 4314 if (co.do_pipe != 1) 4315 errx(EX_DATAERR, "bandwidth only valid for pipes"); 4316 /* 4317 * set clocking interface or bandwidth value 4318 */ 4319 if (av[0][0] >= 'a' && av[0][0] <= 'z') { 4320 int l = sizeof(p.if_name)-1; 4321 /* interface name */ 4322 strncpy(p.if_name, av[0], l); 4323 p.if_name[l] = '\0'; 4324 p.bandwidth = 0; 4325 } else { 4326 p.if_name[0] = '\0'; 4327 p.bandwidth = strtoul(av[0], &end, 0); 4328 if (*end == 'K' || *end == 'k') { 4329 end++; 4330 p.bandwidth *= 1000; 4331 } else if (*end == 'M') { 4332 end++; 4333 p.bandwidth *= 1000000; 4334 } 4335 if ((*end == 'B' && 4336 _substrcmp2(end, "Bi", "Bit/s") != 0) || 4337 _substrcmp2(end, "by", "bytes") == 0) 4338 p.bandwidth *= 8; 4339 if (p.bandwidth < 0) 4340 errx(EX_DATAERR, "bandwidth too large"); 4341 } 4342 ac--; av++; 4343 break; 4344 4345 case TOK_DELAY: 4346 if (co.do_pipe != 1) 4347 errx(EX_DATAERR, "delay only valid for pipes"); 4348 NEED1("delay needs argument 0..10000ms\n"); 4349 p.delay = strtoul(av[0], NULL, 0); 4350 ac--; av++; 4351 break; 4352 4353 case TOK_WEIGHT: 4354 if (co.do_pipe == 1) 4355 errx(EX_DATAERR,"weight only valid for queues"); 4356 NEED1("weight needs argument 0..100\n"); 4357 p.fs.weight = strtoul(av[0], &end, 0); 4358 ac--; av++; 4359 break; 4360 4361 case TOK_PIPE: 4362 if (co.do_pipe == 1) 4363 errx(EX_DATAERR,"pipe only valid for queues"); 4364 NEED1("pipe needs pipe_number\n"); 4365 p.fs.parent_nr = strtoul(av[0], &end, 0); 4366 ac--; av++; 4367 break; 4368 4369 default: 4370 errx(EX_DATAERR, "unrecognised option ``%s''", av[-1]); 4371 } 4372 } 4373 if (co.do_pipe == 1) { 4374 if (p.pipe_nr == 0) 4375 errx(EX_DATAERR, "pipe_nr must be > 0"); 4376 if (p.delay > 10000) 4377 errx(EX_DATAERR, "delay must be < 10000"); 4378 } else { /* co.do_pipe == 2, queue */ 4379 if (p.fs.parent_nr == 0) 4380 errx(EX_DATAERR, "pipe must be > 0"); 4381 if (p.fs.weight >100) 4382 errx(EX_DATAERR, "weight must be <= 100"); 4383 } 4384 if (p.fs.flags_fs & DN_QSIZE_IS_BYTES) { 4385 size_t len; 4386 long limit; 4387 4388 len = sizeof(limit); 4389 if (sysctlbyname("net.inet.ip.dummynet.pipe_byte_limit", 4390 &limit, &len, NULL, 0) == -1) 4391 limit = 1024*1024; 4392 if (p.fs.qsize > limit) 4393 errx(EX_DATAERR, "queue size must be < %ldB", limit); 4394 } else { 4395 size_t len; 4396 long limit; 4397 4398 len = sizeof(limit); 4399 if (sysctlbyname("net.inet.ip.dummynet.pipe_slot_limit", 4400 &limit, &len, NULL, 0) == -1) 4401 limit = 100; 4402 if (p.fs.qsize > limit) 4403 errx(EX_DATAERR, "2 <= queue size <= %ld", limit); 4404 } 4405 if (p.fs.flags_fs & DN_IS_RED) { 4406 size_t len; 4407 int lookup_depth, avg_pkt_size; 4408 double s, idle, weight, w_q; 4409 struct clockinfo ck; 4410 int t; 4411 4412 if (p.fs.min_th >= p.fs.max_th) 4413 errx(EX_DATAERR, "min_th %d must be < than max_th %d", 4414 p.fs.min_th, p.fs.max_th); 4415 if (p.fs.max_th == 0) 4416 errx(EX_DATAERR, "max_th must be > 0"); 4417 4418 len = sizeof(int); 4419 if (sysctlbyname("net.inet.ip.dummynet.red_lookup_depth", 4420 &lookup_depth, &len, NULL, 0) == -1) 4421 errx(1, "sysctlbyname(\"%s\")", 4422 "net.inet.ip.dummynet.red_lookup_depth"); 4423 if (lookup_depth == 0) 4424 errx(EX_DATAERR, "net.inet.ip.dummynet.red_lookup_depth" 4425 " must be greater than zero"); 4426 4427 len = sizeof(int); 4428 if (sysctlbyname("net.inet.ip.dummynet.red_avg_pkt_size", 4429 &avg_pkt_size, &len, NULL, 0) == -1) 4430 4431 errx(1, "sysctlbyname(\"%s\")", 4432 "net.inet.ip.dummynet.red_avg_pkt_size"); 4433 if (avg_pkt_size == 0) 4434 errx(EX_DATAERR, 4435 "net.inet.ip.dummynet.red_avg_pkt_size must" 4436 " be greater than zero"); 4437 4438 len = sizeof(struct clockinfo); 4439 if (sysctlbyname("kern.clockrate", &ck, &len, NULL, 0) == -1) 4440 errx(1, "sysctlbyname(\"%s\")", "kern.clockrate"); 4441 4442 /* 4443 * Ticks needed for sending a medium-sized packet. 4444 * Unfortunately, when we are configuring a WF2Q+ queue, we 4445 * do not have bandwidth information, because that is stored 4446 * in the parent pipe, and also we have multiple queues 4447 * competing for it. So we set s=0, which is not very 4448 * correct. But on the other hand, why do we want RED with 4449 * WF2Q+ ? 4450 */ 4451 if (p.bandwidth==0) /* this is a WF2Q+ queue */ 4452 s = 0; 4453 else 4454 s = (double)ck.hz * avg_pkt_size * 8 / p.bandwidth; 4455 4456 /* 4457 * max idle time (in ticks) before avg queue size becomes 0. 4458 * NOTA: (3/w_q) is approx the value x so that 4459 * (1-w_q)^x < 10^-3. 4460 */ 4461 w_q = ((double)p.fs.w_q) / (1 << SCALE_RED); 4462 idle = s * 3. / w_q; 4463 p.fs.lookup_step = (int)idle / lookup_depth; 4464 if (!p.fs.lookup_step) 4465 p.fs.lookup_step = 1; 4466 weight = 1 - w_q; 4467 for (t = p.fs.lookup_step; t > 1; --t) 4468 weight *= 1 - w_q; 4469 p.fs.lookup_weight = (int)(weight * (1 << SCALE_RED)); 4470 } 4471 i = do_cmd(IP_DUMMYNET_CONFIGURE, &p, sizeof p); 4472 if (i) 4473 err(1, "setsockopt(%s)", "IP_DUMMYNET_CONFIGURE"); 4474} 4475 4476static void 4477get_mac_addr_mask(const char *p, uint8_t *addr, uint8_t *mask) 4478{ 4479 int i, l; 4480 char *ap, *ptr, *optr; 4481 struct ether_addr *mac; 4482 const char *macset = "0123456789abcdefABCDEF:"; 4483 4484 if (strcmp(p, "any") == 0) { 4485 for (i = 0; i < ETHER_ADDR_LEN; i++) 4486 addr[i] = mask[i] = 0; 4487 return; 4488 } 4489 4490 optr = ptr = strdup(p); 4491 if ((ap = strsep(&ptr, "&/")) != NULL && *ap != 0) { 4492 l = strlen(ap); 4493 if (strspn(ap, macset) != l || (mac = ether_aton(ap)) == NULL) 4494 errx(EX_DATAERR, "Incorrect MAC address"); 4495 bcopy(mac, addr, ETHER_ADDR_LEN); 4496 } else 4497 errx(EX_DATAERR, "Incorrect MAC address"); 4498 4499 if (ptr != NULL) { /* we have mask? */ 4500 if (p[ptr - optr - 1] == '/') { /* mask len */ 4501 l = strtol(ptr, &ap, 10); 4502 if (*ap != 0 || l > ETHER_ADDR_LEN * 8 || l < 0) 4503 errx(EX_DATAERR, "Incorrect mask length"); 4504 for (i = 0; l > 0 && i < ETHER_ADDR_LEN; l -= 8, i++) 4505 mask[i] = (l >= 8) ? 0xff: (~0) << (8 - l); 4506 } else { /* mask */ 4507 l = strlen(ptr); 4508 if (strspn(ptr, macset) != l || 4509 (mac = ether_aton(ptr)) == NULL) 4510 errx(EX_DATAERR, "Incorrect mask"); 4511 bcopy(mac, mask, ETHER_ADDR_LEN); 4512 } 4513 } else { /* default mask: ff:ff:ff:ff:ff:ff */ 4514 for (i = 0; i < ETHER_ADDR_LEN; i++) 4515 mask[i] = 0xff; 4516 } 4517 for (i = 0; i < ETHER_ADDR_LEN; i++) 4518 addr[i] &= mask[i]; 4519 4520 free(optr); 4521} 4522 4523/* 4524 * helper function, updates the pointer to cmd with the length 4525 * of the current command, and also cleans up the first word of 4526 * the new command in case it has been clobbered before. 4527 */ 4528static ipfw_insn * 4529next_cmd(ipfw_insn *cmd) 4530{ 4531 cmd += F_LEN(cmd); 4532 bzero(cmd, sizeof(*cmd)); 4533 return cmd; 4534} 4535 4536/* 4537 * Takes arguments and copies them into a comment 4538 */ 4539static void 4540fill_comment(ipfw_insn *cmd, int ac, char **av) 4541{ 4542 int i, l; 4543 char *p = (char *)(cmd + 1); 4544 4545 cmd->opcode = O_NOP; 4546 cmd->len = (cmd->len & (F_NOT | F_OR)); 4547 4548 /* Compute length of comment string. */ 4549 for (i = 0, l = 0; i < ac; i++) 4550 l += strlen(av[i]) + 1; 4551 if (l == 0) 4552 return; 4553 if (l > 84) 4554 errx(EX_DATAERR, 4555 "comment too long (max 80 chars)"); 4556 l = 1 + (l+3)/4; 4557 cmd->len = (cmd->len & (F_NOT | F_OR)) | l; 4558 for (i = 0; i < ac; i++) { 4559 strcpy(p, av[i]); 4560 p += strlen(av[i]); 4561 *p++ = ' '; 4562 } 4563 *(--p) = '\0'; 4564} 4565 4566/* 4567 * A function to fill simple commands of size 1. 4568 * Existing flags are preserved. 4569 */ 4570static void 4571fill_cmd(ipfw_insn *cmd, enum ipfw_opcodes opcode, int flags, uint16_t arg) 4572{ 4573 cmd->opcode = opcode; 4574 cmd->len = ((cmd->len | flags) & (F_NOT | F_OR)) | 1; 4575 cmd->arg1 = arg; 4576} 4577 4578/* 4579 * Fetch and add the MAC address and type, with masks. This generates one or 4580 * two microinstructions, and returns the pointer to the last one. 4581 */ 4582static ipfw_insn * 4583add_mac(ipfw_insn *cmd, int ac, char *av[]) 4584{ 4585 ipfw_insn_mac *mac; 4586 4587 if (ac < 2) 4588 errx(EX_DATAERR, "MAC dst src"); 4589 4590 cmd->opcode = O_MACADDR2; 4591 cmd->len = (cmd->len & (F_NOT | F_OR)) | F_INSN_SIZE(ipfw_insn_mac); 4592 4593 mac = (ipfw_insn_mac *)cmd; 4594 get_mac_addr_mask(av[0], mac->addr, mac->mask); /* dst */ 4595 get_mac_addr_mask(av[1], &(mac->addr[ETHER_ADDR_LEN]), 4596 &(mac->mask[ETHER_ADDR_LEN])); /* src */ 4597 return cmd; 4598} 4599 4600static ipfw_insn * 4601add_mactype(ipfw_insn *cmd, int ac, char *av) 4602{ 4603 if (ac < 1) 4604 errx(EX_DATAERR, "missing MAC type"); 4605 if (strcmp(av, "any") != 0) { /* we have a non-null type */ 4606 fill_newports((ipfw_insn_u16 *)cmd, av, IPPROTO_ETHERTYPE); 4607 cmd->opcode = O_MAC_TYPE; 4608 return cmd; 4609 } else 4610 return NULL; 4611} 4612 4613static ipfw_insn * 4614add_proto0(ipfw_insn *cmd, char *av, u_char *protop) 4615{ 4616 struct protoent *pe; 4617 char *ep; 4618 int proto; 4619 4620 proto = strtol(av, &ep, 10); 4621 if (*ep != '\0' || proto <= 0) { 4622 if ((pe = getprotobyname(av)) == NULL) 4623 return NULL; 4624 proto = pe->p_proto; 4625 } 4626 4627 fill_cmd(cmd, O_PROTO, 0, proto); 4628 *protop = proto; 4629 return cmd; 4630} 4631 4632static ipfw_insn * 4633add_proto(ipfw_insn *cmd, char *av, u_char *protop) 4634{ 4635 u_char proto = IPPROTO_IP; 4636 4637 if (_substrcmp(av, "all") == 0 || strcmp(av, "ip") == 0) 4638 ; /* do not set O_IP4 nor O_IP6 */ 4639 else if (strcmp(av, "ip4") == 0) 4640 /* explicit "just IPv4" rule */ 4641 fill_cmd(cmd, O_IP4, 0, 0); 4642 else if (strcmp(av, "ip6") == 0) { 4643 /* explicit "just IPv6" rule */ 4644 proto = IPPROTO_IPV6; 4645 fill_cmd(cmd, O_IP6, 0, 0); 4646 } else 4647 return add_proto0(cmd, av, protop); 4648 4649 *protop = proto; 4650 return cmd; 4651} 4652 4653static ipfw_insn * 4654add_proto_compat(ipfw_insn *cmd, char *av, u_char *protop) 4655{ 4656 u_char proto = IPPROTO_IP; 4657 4658 if (_substrcmp(av, "all") == 0 || strcmp(av, "ip") == 0) 4659 ; /* do not set O_IP4 nor O_IP6 */ 4660 else if (strcmp(av, "ipv4") == 0 || strcmp(av, "ip4") == 0) 4661 /* explicit "just IPv4" rule */ 4662 fill_cmd(cmd, O_IP4, 0, 0); 4663 else if (strcmp(av, "ipv6") == 0 || strcmp(av, "ip6") == 0) { 4664 /* explicit "just IPv6" rule */ 4665 proto = IPPROTO_IPV6; 4666 fill_cmd(cmd, O_IP6, 0, 0); 4667 } else 4668 return add_proto0(cmd, av, protop); 4669 4670 *protop = proto; 4671 return cmd; 4672} 4673 4674static ipfw_insn * 4675add_srcip(ipfw_insn *cmd, char *av) 4676{ 4677 fill_ip((ipfw_insn_ip *)cmd, av); 4678 if (cmd->opcode == O_IP_DST_SET) /* set */ 4679 cmd->opcode = O_IP_SRC_SET; 4680 else if (cmd->opcode == O_IP_DST_LOOKUP) /* table */ 4681 cmd->opcode = O_IP_SRC_LOOKUP; 4682 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn)) /* me */ 4683 cmd->opcode = O_IP_SRC_ME; 4684 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_u32)) /* one IP */ 4685 cmd->opcode = O_IP_SRC; 4686 else /* addr/mask */ 4687 cmd->opcode = O_IP_SRC_MASK; 4688 return cmd; 4689} 4690 4691static ipfw_insn * 4692add_dstip(ipfw_insn *cmd, char *av) 4693{ 4694 fill_ip((ipfw_insn_ip *)cmd, av); 4695 if (cmd->opcode == O_IP_DST_SET) /* set */ 4696 ; 4697 else if (cmd->opcode == O_IP_DST_LOOKUP) /* table */ 4698 ; 4699 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn)) /* me */ 4700 cmd->opcode = O_IP_DST_ME; 4701 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_u32)) /* one IP */ 4702 cmd->opcode = O_IP_DST; 4703 else /* addr/mask */ 4704 cmd->opcode = O_IP_DST_MASK; 4705 return cmd; 4706} 4707 4708static ipfw_insn * 4709add_ports(ipfw_insn *cmd, char *av, u_char proto, int opcode) 4710{ 4711 if (_substrcmp(av, "any") == 0) { 4712 return NULL; 4713 } else if (fill_newports((ipfw_insn_u16 *)cmd, av, proto)) { 4714 /* XXX todo: check that we have a protocol with ports */ 4715 cmd->opcode = opcode; 4716 return cmd; 4717 } 4718 return NULL; 4719} 4720 4721static ipfw_insn * 4722add_src(ipfw_insn *cmd, char *av, u_char proto) 4723{ 4724 struct in6_addr a; 4725 char *host, *ch; 4726 ipfw_insn *ret = NULL; 4727 4728 if ((host = strdup(av)) == NULL) 4729 return NULL; 4730 if ((ch = strrchr(host, '/')) != NULL) 4731 *ch = '\0'; 4732 4733 if (proto == IPPROTO_IPV6 || strcmp(av, "me6") == 0 || 4734 inet_pton(AF_INET6, host, &a)) 4735 ret = add_srcip6(cmd, av); 4736 /* XXX: should check for IPv4, not !IPv6 */ 4737 if (ret == NULL && (proto == IPPROTO_IP || strcmp(av, "me") == 0 || 4738 !inet_pton(AF_INET6, host, &a))) 4739 ret = add_srcip(cmd, av); 4740 if (ret == NULL && strcmp(av, "any") != 0) 4741 ret = cmd; 4742 4743 free(host); 4744 return ret; 4745} 4746 4747static ipfw_insn * 4748add_dst(ipfw_insn *cmd, char *av, u_char proto) 4749{ 4750 struct in6_addr a; 4751 char *host, *ch; 4752 ipfw_insn *ret = NULL; 4753 4754 if ((host = strdup(av)) == NULL) 4755 return NULL; 4756 if ((ch = strrchr(host, '/')) != NULL) 4757 *ch = '\0'; 4758 4759 if (proto == IPPROTO_IPV6 || strcmp(av, "me6") == 0 || 4760 inet_pton(AF_INET6, host, &a)) 4761 ret = add_dstip6(cmd, av); 4762 /* XXX: should check for IPv4, not !IPv6 */ 4763 if (ret == NULL && (proto == IPPROTO_IP || strcmp(av, "me") == 0 || 4764 !inet_pton(AF_INET6, host, &a))) 4765 ret = add_dstip(cmd, av); 4766 if (ret == NULL && strcmp(av, "any") != 0) 4767 ret = cmd; 4768 4769 free(host); 4770 return ret; 4771} 4772 4773/* 4774 * Parse arguments and assemble the microinstructions which make up a rule. 4775 * Rules are added into the 'rulebuf' and then copied in the correct order 4776 * into the actual rule. 4777 * 4778 * The syntax for a rule starts with the action, followed by 4779 * optional action parameters, and the various match patterns. 4780 * In the assembled microcode, the first opcode must be an O_PROBE_STATE 4781 * (generated if the rule includes a keep-state option), then the 4782 * various match patterns, log/altq actions, and the actual action. 4783 * 4784 */ 4785static void 4786add(int ac, char *av[]) 4787{ 4788 /* 4789 * rules are added into the 'rulebuf' and then copied in 4790 * the correct order into the actual rule. 4791 * Some things that need to go out of order (prob, action etc.) 4792 * go into actbuf[]. 4793 */ 4794 static uint32_t rulebuf[255], actbuf[255], cmdbuf[255]; 4795 4796 ipfw_insn *src, *dst, *cmd, *action, *prev=NULL; 4797 ipfw_insn *first_cmd; /* first match pattern */ 4798 4799 struct ip_fw *rule; 4800 4801 /* 4802 * various flags used to record that we entered some fields. 4803 */ 4804 ipfw_insn *have_state = NULL; /* check-state or keep-state */ 4805 ipfw_insn *have_log = NULL, *have_altq = NULL, *have_tag = NULL; 4806 size_t len; 4807 4808 int i; 4809 4810 int open_par = 0; /* open parenthesis ( */ 4811 4812 /* proto is here because it is used to fetch ports */ 4813 u_char proto = IPPROTO_IP; /* default protocol */ 4814 4815 double match_prob = 1; /* match probability, default is always match */ 4816 4817 bzero(actbuf, sizeof(actbuf)); /* actions go here */ 4818 bzero(cmdbuf, sizeof(cmdbuf)); 4819 bzero(rulebuf, sizeof(rulebuf)); 4820 4821 rule = (struct ip_fw *)rulebuf; 4822 cmd = (ipfw_insn *)cmdbuf; 4823 action = (ipfw_insn *)actbuf; 4824 4825 av++; ac--; 4826 4827 /* [rule N] -- Rule number optional */ 4828 if (ac && isdigit(**av)) { 4829 rule->rulenum = atoi(*av); 4830 av++; 4831 ac--; 4832 } 4833 4834 /* [set N] -- set number (0..RESVD_SET), optional */ 4835 if (ac > 1 && _substrcmp(*av, "set") == 0) { 4836 int set = strtoul(av[1], NULL, 10); 4837 if (set < 0 || set > RESVD_SET) 4838 errx(EX_DATAERR, "illegal set %s", av[1]); 4839 rule->set = set; 4840 av += 2; ac -= 2; 4841 } 4842 4843 /* [prob D] -- match probability, optional */ 4844 if (ac > 1 && _substrcmp(*av, "prob") == 0) { 4845 match_prob = strtod(av[1], NULL); 4846 4847 if (match_prob <= 0 || match_prob > 1) 4848 errx(EX_DATAERR, "illegal match prob. %s", av[1]); 4849 av += 2; ac -= 2; 4850 } 4851 4852 /* action -- mandatory */ 4853 NEED1("missing action"); 4854 i = match_token(rule_actions, *av); 4855 ac--; av++; 4856 action->len = 1; /* default */ 4857 switch(i) { 4858 case TOK_CHECKSTATE: 4859 have_state = action; 4860 action->opcode = O_CHECK_STATE; 4861 break; 4862 4863 case TOK_ACCEPT: 4864 action->opcode = O_ACCEPT; 4865 break; 4866 4867 case TOK_DENY: 4868 action->opcode = O_DENY; 4869 action->arg1 = 0; 4870 break; 4871 4872 case TOK_REJECT: 4873 action->opcode = O_REJECT; 4874 action->arg1 = ICMP_UNREACH_HOST; 4875 break; 4876 4877 case TOK_RESET: 4878 action->opcode = O_REJECT; 4879 action->arg1 = ICMP_REJECT_RST; 4880 break; 4881 4882 case TOK_RESET6: 4883 action->opcode = O_UNREACH6; 4884 action->arg1 = ICMP6_UNREACH_RST; 4885 break; 4886 4887 case TOK_UNREACH: 4888 action->opcode = O_REJECT; 4889 NEED1("missing reject code"); 4890 fill_reject_code(&action->arg1, *av); 4891 ac--; av++; 4892 break; 4893 4894 case TOK_UNREACH6: 4895 action->opcode = O_UNREACH6; 4896 NEED1("missing unreach code"); 4897 fill_unreach6_code(&action->arg1, *av); 4898 ac--; av++; 4899 break; 4900 4901 case TOK_COUNT: 4902 action->opcode = O_COUNT; 4903 break; 4904 4905 case TOK_NAT: 4906 action->opcode = O_NAT; 4907 action->len = F_INSN_SIZE(ipfw_insn_nat); 4908 goto chkarg; 4909 4910 case TOK_QUEUE: 4911 action->opcode = O_QUEUE; 4912 goto chkarg; 4913 case TOK_PIPE: 4914 action->opcode = O_PIPE; 4915 goto chkarg; 4916 case TOK_SKIPTO: 4917 action->opcode = O_SKIPTO; 4918 goto chkarg; 4919 case TOK_NETGRAPH: 4920 action->opcode = O_NETGRAPH; 4921 goto chkarg; 4922 case TOK_NGTEE: 4923 action->opcode = O_NGTEE; 4924 goto chkarg; 4925 case TOK_DIVERT: 4926 action->opcode = O_DIVERT; 4927 goto chkarg; 4928 case TOK_TEE: 4929 action->opcode = O_TEE; 4930chkarg: 4931 if (!ac) 4932 errx(EX_USAGE, "missing argument for %s", *(av - 1)); 4933 if (isdigit(**av)) { 4934 action->arg1 = strtoul(*av, NULL, 10); 4935 if (action->arg1 <= 0 || action->arg1 >= IP_FW_TABLEARG) 4936 errx(EX_DATAERR, "illegal argument for %s", 4937 *(av - 1)); 4938 } else if (_substrcmp(*av, "tablearg") == 0) { 4939 action->arg1 = IP_FW_TABLEARG; 4940 } else if (i == TOK_DIVERT || i == TOK_TEE) { 4941 struct servent *s; 4942 setservent(1); 4943 s = getservbyname(av[0], "divert"); 4944 if (s != NULL) 4945 action->arg1 = ntohs(s->s_port); 4946 else 4947 errx(EX_DATAERR, "illegal divert/tee port"); 4948 } else 4949 errx(EX_DATAERR, "illegal argument for %s", *(av - 1)); 4950 ac--; av++; 4951 break; 4952 4953 case TOK_FORWARD: { 4954 ipfw_insn_sa *p = (ipfw_insn_sa *)action; 4955 char *s, *end; 4956 4957 NEED1("missing forward address[:port]"); 4958 4959 action->opcode = O_FORWARD_IP; 4960 action->len = F_INSN_SIZE(ipfw_insn_sa); 4961 4962 p->sa.sin_len = sizeof(struct sockaddr_in); 4963 p->sa.sin_family = AF_INET; 4964 p->sa.sin_port = 0; 4965 /* 4966 * locate the address-port separator (':' or ',') 4967 */ 4968 s = strchr(*av, ':'); 4969 if (s == NULL) 4970 s = strchr(*av, ','); 4971 if (s != NULL) { 4972 *(s++) = '\0'; 4973 i = strtoport(s, &end, 0 /* base */, 0 /* proto */); 4974 if (s == end) 4975 errx(EX_DATAERR, 4976 "illegal forwarding port ``%s''", s); 4977 p->sa.sin_port = (u_short)i; 4978 } 4979 if (_substrcmp(*av, "tablearg") == 0) 4980 p->sa.sin_addr.s_addr = INADDR_ANY; 4981 else 4982 lookup_host(*av, &(p->sa.sin_addr)); 4983 ac--; av++; 4984 break; 4985 } 4986 case TOK_COMMENT: 4987 /* pretend it is a 'count' rule followed by the comment */ 4988 action->opcode = O_COUNT; 4989 ac++; av--; /* go back... */ 4990 break; 4991 4992 case TOK_SETFIB: 4993 { 4994 int numfibs; 4995 size_t intsize = sizeof(int); 4996 4997 action->opcode = O_SETFIB; 4998 NEED1("missing fib number"); 4999 action->arg1 = strtoul(*av, NULL, 10); 5000 if (sysctlbyname("net.fibs", &numfibs, &intsize, NULL, 0) == -1) 5001 errx(EX_DATAERR, "fibs not suported.\n"); 5002 if (action->arg1 >= numfibs) /* Temporary */ 5003 errx(EX_DATAERR, "fib too large.\n"); 5004 ac--; av++; 5005 break; 5006 } 5007 5008 default: 5009 errx(EX_DATAERR, "invalid action %s\n", av[-1]); 5010 } 5011 action = next_cmd(action); 5012 5013 /* 5014 * [altq queuename] -- altq tag, optional 5015 * [log [logamount N]] -- log, optional 5016 * 5017 * If they exist, it go first in the cmdbuf, but then it is 5018 * skipped in the copy section to the end of the buffer. 5019 */ 5020 while (ac != 0 && (i = match_token(rule_action_params, *av)) != -1) { 5021 ac--; av++; 5022 switch (i) { 5023 case TOK_LOG: 5024 { 5025 ipfw_insn_log *c = (ipfw_insn_log *)cmd; 5026 int l; 5027 5028 if (have_log) 5029 errx(EX_DATAERR, 5030 "log cannot be specified more than once"); 5031 have_log = (ipfw_insn *)c; 5032 cmd->len = F_INSN_SIZE(ipfw_insn_log); 5033 cmd->opcode = O_LOG; 5034 if (ac && _substrcmp(*av, "logamount") == 0) { 5035 ac--; av++; 5036 NEED1("logamount requires argument"); 5037 l = atoi(*av); 5038 if (l < 0) 5039 errx(EX_DATAERR, 5040 "logamount must be positive"); 5041 c->max_log = l; 5042 ac--; av++; 5043 } else { 5044 len = sizeof(c->max_log); 5045 if (sysctlbyname("net.inet.ip.fw.verbose_limit", 5046 &c->max_log, &len, NULL, 0) == -1) 5047 errx(1, "sysctlbyname(\"%s\")", 5048 "net.inet.ip.fw.verbose_limit"); 5049 } 5050 } 5051 break; 5052 5053 case TOK_ALTQ: 5054 { 5055 ipfw_insn_altq *a = (ipfw_insn_altq *)cmd; 5056 5057 NEED1("missing altq queue name"); 5058 if (have_altq) 5059 errx(EX_DATAERR, 5060 "altq cannot be specified more than once"); 5061 have_altq = (ipfw_insn *)a; 5062 cmd->len = F_INSN_SIZE(ipfw_insn_altq); 5063 cmd->opcode = O_ALTQ; 5064 fill_altq_qid(&a->qid, *av); 5065 ac--; av++; 5066 } 5067 break; 5068 5069 case TOK_TAG: 5070 case TOK_UNTAG: { 5071 uint16_t tag; 5072 5073 if (have_tag) 5074 errx(EX_USAGE, "tag and untag cannot be " 5075 "specified more than once"); 5076 GET_UINT_ARG(tag, 1, IPFW_DEFAULT_RULE - 1, i, 5077 rule_action_params); 5078 have_tag = cmd; 5079 fill_cmd(cmd, O_TAG, (i == TOK_TAG) ? 0: F_NOT, tag); 5080 ac--; av++; 5081 break; 5082 } 5083 5084 default: 5085 abort(); 5086 } 5087 cmd = next_cmd(cmd); 5088 } 5089 5090 if (have_state) /* must be a check-state, we are done */ 5091 goto done; 5092 5093#define OR_START(target) \ 5094 if (ac && (*av[0] == '(' || *av[0] == '{')) { \ 5095 if (open_par) \ 5096 errx(EX_USAGE, "nested \"(\" not allowed\n"); \ 5097 prev = NULL; \ 5098 open_par = 1; \ 5099 if ( (av[0])[1] == '\0') { \ 5100 ac--; av++; \ 5101 } else \ 5102 (*av)++; \ 5103 } \ 5104 target: \ 5105 5106 5107#define CLOSE_PAR \ 5108 if (open_par) { \ 5109 if (ac && ( \ 5110 strcmp(*av, ")") == 0 || \ 5111 strcmp(*av, "}") == 0)) { \ 5112 prev = NULL; \ 5113 open_par = 0; \ 5114 ac--; av++; \ 5115 } else \ 5116 errx(EX_USAGE, "missing \")\"\n"); \ 5117 } 5118 5119#define NOT_BLOCK \ 5120 if (ac && _substrcmp(*av, "not") == 0) { \ 5121 if (cmd->len & F_NOT) \ 5122 errx(EX_USAGE, "double \"not\" not allowed\n"); \ 5123 cmd->len |= F_NOT; \ 5124 ac--; av++; \ 5125 } 5126 5127#define OR_BLOCK(target) \ 5128 if (ac && _substrcmp(*av, "or") == 0) { \ 5129 if (prev == NULL || open_par == 0) \ 5130 errx(EX_DATAERR, "invalid OR block"); \ 5131 prev->len |= F_OR; \ 5132 ac--; av++; \ 5133 goto target; \ 5134 } \ 5135 CLOSE_PAR; 5136 5137 first_cmd = cmd; 5138 5139#if 0 5140 /* 5141 * MAC addresses, optional. 5142 * If we have this, we skip the part "proto from src to dst" 5143 * and jump straight to the option parsing. 5144 */ 5145 NOT_BLOCK; 5146 NEED1("missing protocol"); 5147 if (_substrcmp(*av, "MAC") == 0 || 5148 _substrcmp(*av, "mac") == 0) { 5149 ac--; av++; /* the "MAC" keyword */ 5150 add_mac(cmd, ac, av); /* exits in case of errors */ 5151 cmd = next_cmd(cmd); 5152 ac -= 2; av += 2; /* dst-mac and src-mac */ 5153 NOT_BLOCK; 5154 NEED1("missing mac type"); 5155 if (add_mactype(cmd, ac, av[0])) 5156 cmd = next_cmd(cmd); 5157 ac--; av++; /* any or mac-type */ 5158 goto read_options; 5159 } 5160#endif 5161 5162 /* 5163 * protocol, mandatory 5164 */ 5165 OR_START(get_proto); 5166 NOT_BLOCK; 5167 NEED1("missing protocol"); 5168 if (add_proto_compat(cmd, *av, &proto)) { 5169 av++; ac--; 5170 if (F_LEN(cmd) != 0) { 5171 prev = cmd; 5172 cmd = next_cmd(cmd); 5173 } 5174 } else if (first_cmd != cmd) { 5175 errx(EX_DATAERR, "invalid protocol ``%s''", *av); 5176 } else 5177 goto read_options; 5178 OR_BLOCK(get_proto); 5179 5180 /* 5181 * "from", mandatory 5182 */ 5183 if (!ac || _substrcmp(*av, "from") != 0) 5184 errx(EX_USAGE, "missing ``from''"); 5185 ac--; av++; 5186 5187 /* 5188 * source IP, mandatory 5189 */ 5190 OR_START(source_ip); 5191 NOT_BLOCK; /* optional "not" */ 5192 NEED1("missing source address"); 5193 if (add_src(cmd, *av, proto)) { 5194 ac--; av++; 5195 if (F_LEN(cmd) != 0) { /* ! any */ 5196 prev = cmd; 5197 cmd = next_cmd(cmd); 5198 } 5199 } else 5200 errx(EX_USAGE, "bad source address %s", *av); 5201 OR_BLOCK(source_ip); 5202 5203 /* 5204 * source ports, optional 5205 */ 5206 NOT_BLOCK; /* optional "not" */ 5207 if (ac) { 5208 if (_substrcmp(*av, "any") == 0 || 5209 add_ports(cmd, *av, proto, O_IP_SRCPORT)) { 5210 ac--; av++; 5211 if (F_LEN(cmd) != 0) 5212 cmd = next_cmd(cmd); 5213 } 5214 } 5215 5216 /* 5217 * "to", mandatory 5218 */ 5219 if (!ac || _substrcmp(*av, "to") != 0) 5220 errx(EX_USAGE, "missing ``to''"); 5221 av++; ac--; 5222 5223 /* 5224 * destination, mandatory 5225 */ 5226 OR_START(dest_ip); 5227 NOT_BLOCK; /* optional "not" */ 5228 NEED1("missing dst address"); 5229 if (add_dst(cmd, *av, proto)) { 5230 ac--; av++; 5231 if (F_LEN(cmd) != 0) { /* ! any */ 5232 prev = cmd; 5233 cmd = next_cmd(cmd); 5234 } 5235 } else 5236 errx( EX_USAGE, "bad destination address %s", *av); 5237 OR_BLOCK(dest_ip); 5238 5239 /* 5240 * dest. ports, optional 5241 */ 5242 NOT_BLOCK; /* optional "not" */ 5243 if (ac) { 5244 if (_substrcmp(*av, "any") == 0 || 5245 add_ports(cmd, *av, proto, O_IP_DSTPORT)) { 5246 ac--; av++; 5247 if (F_LEN(cmd) != 0) 5248 cmd = next_cmd(cmd); 5249 } 5250 } 5251 5252read_options: 5253 if (ac && first_cmd == cmd) { 5254 /* 5255 * nothing specified so far, store in the rule to ease 5256 * printout later. 5257 */ 5258 rule->_pad = 1; 5259 } 5260 prev = NULL; 5261 while (ac) { 5262 char *s; 5263 ipfw_insn_u32 *cmd32; /* alias for cmd */ 5264 5265 s = *av; 5266 cmd32 = (ipfw_insn_u32 *)cmd; 5267 5268 if (*s == '!') { /* alternate syntax for NOT */ 5269 if (cmd->len & F_NOT) 5270 errx(EX_USAGE, "double \"not\" not allowed\n"); 5271 cmd->len = F_NOT; 5272 s++; 5273 } 5274 i = match_token(rule_options, s); 5275 ac--; av++; 5276 switch(i) { 5277 case TOK_NOT: 5278 if (cmd->len & F_NOT) 5279 errx(EX_USAGE, "double \"not\" not allowed\n"); 5280 cmd->len = F_NOT; 5281 break; 5282 5283 case TOK_OR: 5284 if (open_par == 0 || prev == NULL) 5285 errx(EX_USAGE, "invalid \"or\" block\n"); 5286 prev->len |= F_OR; 5287 break; 5288 5289 case TOK_STARTBRACE: 5290 if (open_par) 5291 errx(EX_USAGE, "+nested \"(\" not allowed\n"); 5292 open_par = 1; 5293 break; 5294 5295 case TOK_ENDBRACE: 5296 if (!open_par) 5297 errx(EX_USAGE, "+missing \")\"\n"); 5298 open_par = 0; 5299 prev = NULL; 5300 break; 5301 5302 case TOK_IN: 5303 fill_cmd(cmd, O_IN, 0, 0); 5304 break; 5305 5306 case TOK_OUT: 5307 cmd->len ^= F_NOT; /* toggle F_NOT */ 5308 fill_cmd(cmd, O_IN, 0, 0); 5309 break; 5310 5311 case TOK_DIVERTED: 5312 fill_cmd(cmd, O_DIVERTED, 0, 3); 5313 break; 5314 5315 case TOK_DIVERTEDLOOPBACK: 5316 fill_cmd(cmd, O_DIVERTED, 0, 1); 5317 break; 5318 5319 case TOK_DIVERTEDOUTPUT: 5320 fill_cmd(cmd, O_DIVERTED, 0, 2); 5321 break; 5322 5323 case TOK_FRAG: 5324 fill_cmd(cmd, O_FRAG, 0, 0); 5325 break; 5326 5327 case TOK_LAYER2: 5328 fill_cmd(cmd, O_LAYER2, 0, 0); 5329 break; 5330 5331 case TOK_XMIT: 5332 case TOK_RECV: 5333 case TOK_VIA: 5334 NEED1("recv, xmit, via require interface name" 5335 " or address"); 5336 fill_iface((ipfw_insn_if *)cmd, av[0]); 5337 ac--; av++; 5338 if (F_LEN(cmd) == 0) /* not a valid address */ 5339 break; 5340 if (i == TOK_XMIT) 5341 cmd->opcode = O_XMIT; 5342 else if (i == TOK_RECV) 5343 cmd->opcode = O_RECV; 5344 else if (i == TOK_VIA) 5345 cmd->opcode = O_VIA; 5346 break; 5347 5348 case TOK_ICMPTYPES: 5349 NEED1("icmptypes requires list of types"); 5350 fill_icmptypes((ipfw_insn_u32 *)cmd, *av); 5351 av++; ac--; 5352 break; 5353 5354 case TOK_ICMP6TYPES: 5355 NEED1("icmptypes requires list of types"); 5356 fill_icmp6types((ipfw_insn_icmp6 *)cmd, *av); 5357 av++; ac--; 5358 break; 5359 5360 case TOK_IPTTL: 5361 NEED1("ipttl requires TTL"); 5362 if (strpbrk(*av, "-,")) { 5363 if (!add_ports(cmd, *av, 0, O_IPTTL)) 5364 errx(EX_DATAERR, "invalid ipttl %s", *av); 5365 } else 5366 fill_cmd(cmd, O_IPTTL, 0, strtoul(*av, NULL, 0)); 5367 ac--; av++; 5368 break; 5369 5370 case TOK_IPID: 5371 NEED1("ipid requires id"); 5372 if (strpbrk(*av, "-,")) { 5373 if (!add_ports(cmd, *av, 0, O_IPID)) 5374 errx(EX_DATAERR, "invalid ipid %s", *av); 5375 } else 5376 fill_cmd(cmd, O_IPID, 0, strtoul(*av, NULL, 0)); 5377 ac--; av++; 5378 break; 5379 5380 case TOK_IPLEN: 5381 NEED1("iplen requires length"); 5382 if (strpbrk(*av, "-,")) { 5383 if (!add_ports(cmd, *av, 0, O_IPLEN)) 5384 errx(EX_DATAERR, "invalid ip len %s", *av); 5385 } else 5386 fill_cmd(cmd, O_IPLEN, 0, strtoul(*av, NULL, 0)); 5387 ac--; av++; 5388 break; 5389 5390 case TOK_IPVER: 5391 NEED1("ipver requires version"); 5392 fill_cmd(cmd, O_IPVER, 0, strtoul(*av, NULL, 0)); 5393 ac--; av++; 5394 break; 5395 5396 case TOK_IPPRECEDENCE: 5397 NEED1("ipprecedence requires value"); 5398 fill_cmd(cmd, O_IPPRECEDENCE, 0, 5399 (strtoul(*av, NULL, 0) & 7) << 5); 5400 ac--; av++; 5401 break; 5402 5403 case TOK_IPOPTS: 5404 NEED1("missing argument for ipoptions"); 5405 fill_flags(cmd, O_IPOPT, f_ipopts, *av); 5406 ac--; av++; 5407 break; 5408 5409 case TOK_IPTOS: 5410 NEED1("missing argument for iptos"); 5411 fill_flags(cmd, O_IPTOS, f_iptos, *av); 5412 ac--; av++; 5413 break; 5414 5415 case TOK_UID: 5416 NEED1("uid requires argument"); 5417 { 5418 char *end; 5419 uid_t uid; 5420 struct passwd *pwd; 5421 5422 cmd->opcode = O_UID; 5423 uid = strtoul(*av, &end, 0); 5424 pwd = (*end == '\0') ? getpwuid(uid) : getpwnam(*av); 5425 if (pwd == NULL) 5426 errx(EX_DATAERR, "uid \"%s\" nonexistent", *av); 5427 cmd32->d[0] = pwd->pw_uid; 5428 cmd->len |= F_INSN_SIZE(ipfw_insn_u32); 5429 ac--; av++; 5430 } 5431 break; 5432 5433 case TOK_GID: 5434 NEED1("gid requires argument"); 5435 { 5436 char *end; 5437 gid_t gid; 5438 struct group *grp; 5439 5440 cmd->opcode = O_GID; 5441 gid = strtoul(*av, &end, 0); 5442 grp = (*end == '\0') ? getgrgid(gid) : getgrnam(*av); 5443 if (grp == NULL) 5444 errx(EX_DATAERR, "gid \"%s\" nonexistent", *av); 5445 cmd32->d[0] = grp->gr_gid; 5446 cmd->len |= F_INSN_SIZE(ipfw_insn_u32); 5447 ac--; av++; 5448 } 5449 break; 5450 5451 case TOK_JAIL: 5452 NEED1("jail requires argument"); 5453 { 5454 char *end; 5455 int jid; 5456 5457 cmd->opcode = O_JAIL; 5458 jid = (int)strtol(*av, &end, 0); 5459 if (jid < 0 || *end != '\0') 5460 errx(EX_DATAERR, "jail requires prison ID"); 5461 cmd32->d[0] = (uint32_t)jid; 5462 cmd->len |= F_INSN_SIZE(ipfw_insn_u32); 5463 ac--; av++; 5464 } 5465 break; 5466 5467 case TOK_ESTAB: 5468 fill_cmd(cmd, O_ESTAB, 0, 0); 5469 break; 5470 5471 case TOK_SETUP: 5472 fill_cmd(cmd, O_TCPFLAGS, 0, 5473 (TH_SYN) | ( (TH_ACK) & 0xff) <<8 ); 5474 break; 5475 5476 case TOK_TCPDATALEN: 5477 NEED1("tcpdatalen requires length"); 5478 if (strpbrk(*av, "-,")) { 5479 if (!add_ports(cmd, *av, 0, O_TCPDATALEN)) 5480 errx(EX_DATAERR, "invalid tcpdata len %s", *av); 5481 } else 5482 fill_cmd(cmd, O_TCPDATALEN, 0, 5483 strtoul(*av, NULL, 0)); 5484 ac--; av++; 5485 break; 5486 5487 case TOK_TCPOPTS: 5488 NEED1("missing argument for tcpoptions"); 5489 fill_flags(cmd, O_TCPOPTS, f_tcpopts, *av); 5490 ac--; av++; 5491 break; 5492 5493 case TOK_TCPSEQ: 5494 case TOK_TCPACK: 5495 NEED1("tcpseq/tcpack requires argument"); 5496 cmd->len = F_INSN_SIZE(ipfw_insn_u32); 5497 cmd->opcode = (i == TOK_TCPSEQ) ? O_TCPSEQ : O_TCPACK; 5498 cmd32->d[0] = htonl(strtoul(*av, NULL, 0)); 5499 ac--; av++; 5500 break; 5501 5502 case TOK_TCPWIN: 5503 NEED1("tcpwin requires length"); 5504 fill_cmd(cmd, O_TCPWIN, 0, 5505 htons(strtoul(*av, NULL, 0))); 5506 ac--; av++; 5507 break; 5508 5509 case TOK_TCPFLAGS: 5510 NEED1("missing argument for tcpflags"); 5511 cmd->opcode = O_TCPFLAGS; 5512 fill_flags(cmd, O_TCPFLAGS, f_tcpflags, *av); 5513 ac--; av++; 5514 break; 5515 5516 case TOK_KEEPSTATE: 5517 if (open_par) 5518 errx(EX_USAGE, "keep-state cannot be part " 5519 "of an or block"); 5520 if (have_state) 5521 errx(EX_USAGE, "only one of keep-state " 5522 "and limit is allowed"); 5523 have_state = cmd; 5524 fill_cmd(cmd, O_KEEP_STATE, 0, 0); 5525 break; 5526 5527 case TOK_LIMIT: { 5528 ipfw_insn_limit *c = (ipfw_insn_limit *)cmd; 5529 int val; 5530 5531 if (open_par) 5532 errx(EX_USAGE, 5533 "limit cannot be part of an or block"); 5534 if (have_state) 5535 errx(EX_USAGE, "only one of keep-state and " 5536 "limit is allowed"); 5537 have_state = cmd; 5538 5539 cmd->len = F_INSN_SIZE(ipfw_insn_limit); 5540 cmd->opcode = O_LIMIT; 5541 c->limit_mask = c->conn_limit = 0; 5542 5543 while (ac > 0) { 5544 if ((val = match_token(limit_masks, *av)) <= 0) 5545 break; 5546 c->limit_mask |= val; 5547 ac--; av++; 5548 } 5549 5550 if (c->limit_mask == 0) 5551 errx(EX_USAGE, "limit: missing limit mask"); 5552 5553 GET_UINT_ARG(c->conn_limit, 1, IPFW_DEFAULT_RULE - 1, 5554 TOK_LIMIT, rule_options); 5555 5556 ac--; av++; 5557 break; 5558 } 5559 5560 case TOK_PROTO: 5561 NEED1("missing protocol"); 5562 if (add_proto(cmd, *av, &proto)) { 5563 ac--; av++; 5564 } else 5565 errx(EX_DATAERR, "invalid protocol ``%s''", 5566 *av); 5567 break; 5568 5569 case TOK_SRCIP: 5570 NEED1("missing source IP"); 5571 if (add_srcip(cmd, *av)) { 5572 ac--; av++; 5573 } 5574 break; 5575 5576 case TOK_DSTIP: 5577 NEED1("missing destination IP"); 5578 if (add_dstip(cmd, *av)) { 5579 ac--; av++; 5580 } 5581 break; 5582 5583 case TOK_SRCIP6: 5584 NEED1("missing source IP6"); 5585 if (add_srcip6(cmd, *av)) { 5586 ac--; av++; 5587 } 5588 break; 5589 5590 case TOK_DSTIP6: 5591 NEED1("missing destination IP6"); 5592 if (add_dstip6(cmd, *av)) { 5593 ac--; av++; 5594 } 5595 break; 5596 5597 case TOK_SRCPORT: 5598 NEED1("missing source port"); 5599 if (_substrcmp(*av, "any") == 0 || 5600 add_ports(cmd, *av, proto, O_IP_SRCPORT)) { 5601 ac--; av++; 5602 } else 5603 errx(EX_DATAERR, "invalid source port %s", *av); 5604 break; 5605 5606 case TOK_DSTPORT: 5607 NEED1("missing destination port"); 5608 if (_substrcmp(*av, "any") == 0 || 5609 add_ports(cmd, *av, proto, O_IP_DSTPORT)) { 5610 ac--; av++; 5611 } else 5612 errx(EX_DATAERR, "invalid destination port %s", 5613 *av); 5614 break; 5615 5616 case TOK_MAC: 5617 if (add_mac(cmd, ac, av)) { 5618 ac -= 2; av += 2; 5619 } 5620 break; 5621 5622 case TOK_MACTYPE: 5623 NEED1("missing mac type"); 5624 if (!add_mactype(cmd, ac, *av)) 5625 errx(EX_DATAERR, "invalid mac type %s", *av); 5626 ac--; av++; 5627 break; 5628 5629 case TOK_VERREVPATH: 5630 fill_cmd(cmd, O_VERREVPATH, 0, 0); 5631 break; 5632 5633 case TOK_VERSRCREACH: 5634 fill_cmd(cmd, O_VERSRCREACH, 0, 0); 5635 break; 5636 5637 case TOK_ANTISPOOF: 5638 fill_cmd(cmd, O_ANTISPOOF, 0, 0); 5639 break; 5640 5641 case TOK_IPSEC: 5642 fill_cmd(cmd, O_IPSEC, 0, 0); 5643 break; 5644 5645 case TOK_IPV6: 5646 fill_cmd(cmd, O_IP6, 0, 0); 5647 break; 5648 5649 case TOK_IPV4: 5650 fill_cmd(cmd, O_IP4, 0, 0); 5651 break; 5652 5653 case TOK_EXT6HDR: 5654 fill_ext6hdr( cmd, *av ); 5655 ac--; av++; 5656 break; 5657 5658 case TOK_FLOWID: 5659 if (proto != IPPROTO_IPV6 ) 5660 errx( EX_USAGE, "flow-id filter is active " 5661 "only for ipv6 protocol\n"); 5662 fill_flow6( (ipfw_insn_u32 *) cmd, *av ); 5663 ac--; av++; 5664 break; 5665 5666 case TOK_COMMENT: 5667 fill_comment(cmd, ac, av); 5668 av += ac; 5669 ac = 0; 5670 break; 5671 5672 case TOK_TAGGED: 5673 if (ac > 0 && strpbrk(*av, "-,")) { 5674 if (!add_ports(cmd, *av, 0, O_TAGGED)) 5675 errx(EX_DATAERR, "tagged: invalid tag" 5676 " list: %s", *av); 5677 } 5678 else { 5679 uint16_t tag; 5680 5681 GET_UINT_ARG(tag, 1, IPFW_DEFAULT_RULE - 1, 5682 TOK_TAGGED, rule_options); 5683 fill_cmd(cmd, O_TAGGED, 0, tag); 5684 } 5685 ac--; av++; 5686 break; 5687 5688 case TOK_FIB: 5689 NEED1("fib requires fib number"); 5690 fill_cmd(cmd, O_FIB, 0, strtoul(*av, NULL, 0)); 5691 ac--; av++; 5692 break; 5693 5694 default: 5695 errx(EX_USAGE, "unrecognised option [%d] %s\n", i, s); 5696 } 5697 if (F_LEN(cmd) > 0) { /* prepare to advance */ 5698 prev = cmd; 5699 cmd = next_cmd(cmd); 5700 } 5701 } 5702 5703done: 5704 /* 5705 * Now copy stuff into the rule. 5706 * If we have a keep-state option, the first instruction 5707 * must be a PROBE_STATE (which is generated here). 5708 * If we have a LOG option, it was stored as the first command, 5709 * and now must be moved to the top of the action part. 5710 */ 5711 dst = (ipfw_insn *)rule->cmd; 5712 5713 /* 5714 * First thing to write into the command stream is the match probability. 5715 */ 5716 if (match_prob != 1) { /* 1 means always match */ 5717 dst->opcode = O_PROB; 5718 dst->len = 2; 5719 *((int32_t *)(dst+1)) = (int32_t)(match_prob * 0x7fffffff); 5720 dst += dst->len; 5721 } 5722 5723 /* 5724 * generate O_PROBE_STATE if necessary 5725 */ 5726 if (have_state && have_state->opcode != O_CHECK_STATE) { 5727 fill_cmd(dst, O_PROBE_STATE, 0, 0); 5728 dst = next_cmd(dst); 5729 } 5730 5731 /* copy all commands but O_LOG, O_KEEP_STATE, O_LIMIT, O_ALTQ, O_TAG */ 5732 for (src = (ipfw_insn *)cmdbuf; src != cmd; src += i) { 5733 i = F_LEN(src); 5734 5735 switch (src->opcode) { 5736 case O_LOG: 5737 case O_KEEP_STATE: 5738 case O_LIMIT: 5739 case O_ALTQ: 5740 case O_TAG: 5741 break; 5742 default: 5743 bcopy(src, dst, i * sizeof(uint32_t)); 5744 dst += i; 5745 } 5746 } 5747 5748 /* 5749 * put back the have_state command as last opcode 5750 */ 5751 if (have_state && have_state->opcode != O_CHECK_STATE) { 5752 i = F_LEN(have_state); 5753 bcopy(have_state, dst, i * sizeof(uint32_t)); 5754 dst += i; 5755 } 5756 /* 5757 * start action section 5758 */ 5759 rule->act_ofs = dst - rule->cmd; 5760 5761 /* put back O_LOG, O_ALTQ, O_TAG if necessary */ 5762 if (have_log) { 5763 i = F_LEN(have_log); 5764 bcopy(have_log, dst, i * sizeof(uint32_t)); 5765 dst += i; 5766 } 5767 if (have_altq) { 5768 i = F_LEN(have_altq); 5769 bcopy(have_altq, dst, i * sizeof(uint32_t)); 5770 dst += i; 5771 } 5772 if (have_tag) { 5773 i = F_LEN(have_tag); 5774 bcopy(have_tag, dst, i * sizeof(uint32_t)); 5775 dst += i; 5776 } 5777 /* 5778 * copy all other actions 5779 */ 5780 for (src = (ipfw_insn *)actbuf; src != action; src += i) { 5781 i = F_LEN(src); 5782 bcopy(src, dst, i * sizeof(uint32_t)); 5783 dst += i; 5784 } 5785 5786 rule->cmd_len = (uint32_t *)dst - (uint32_t *)(rule->cmd); 5787 i = (char *)dst - (char *)rule; 5788 if (do_cmd(IP_FW_ADD, rule, (uintptr_t)&i) == -1) 5789 err(EX_UNAVAILABLE, "getsockopt(%s)", "IP_FW_ADD"); 5790 if (!co.do_quiet) 5791 show_ipfw(rule, 0, 0); 5792} 5793 5794static void 5795zero(int ac, char *av[], int optname /* IP_FW_ZERO or IP_FW_RESETLOG */) 5796{ 5797 uint32_t arg, saved_arg; 5798 int failed = EX_OK; 5799 char const *name = optname == IP_FW_ZERO ? "ZERO" : "RESETLOG"; 5800 char const *errstr; 5801 5802 av++; ac--; 5803 5804 if (!ac) { 5805 /* clear all entries */ 5806 if (do_cmd(optname, NULL, 0) < 0) 5807 err(EX_UNAVAILABLE, "setsockopt(IP_FW_%s)", name); 5808 if (!co.do_quiet) 5809 printf("%s.\n", optname == IP_FW_ZERO ? 5810 "Accounting cleared":"Logging counts reset"); 5811 5812 return; 5813 } 5814 5815 while (ac) { 5816 /* Rule number */ 5817 if (isdigit(**av)) { 5818 arg = strtonum(*av, 0, 0xffff, &errstr); 5819 if (errstr) 5820 errx(EX_DATAERR, 5821 "invalid rule number %s\n", *av); 5822 saved_arg = arg; 5823 if (co.use_set) 5824 arg |= (1 << 24) | ((co.use_set - 1) << 16); 5825 av++; 5826 ac--; 5827 if (do_cmd(optname, &arg, sizeof(arg))) { 5828 warn("rule %u: setsockopt(IP_FW_%s)", 5829 saved_arg, name); 5830 failed = EX_UNAVAILABLE; 5831 } else if (!co.do_quiet) 5832 printf("Entry %d %s.\n", saved_arg, 5833 optname == IP_FW_ZERO ? 5834 "cleared" : "logging count reset"); 5835 } else { 5836 errx(EX_USAGE, "invalid rule number ``%s''", *av); 5837 } 5838 } 5839 if (failed != EX_OK) 5840 exit(failed); 5841} 5842 5843static void 5844flush(int force) 5845{ 5846 int cmd = co.do_pipe ? IP_DUMMYNET_FLUSH : IP_FW_FLUSH; 5847 5848 if (!force && !co.do_quiet) { /* need to ask user */ 5849 int c; 5850 5851 printf("Are you sure? [yn] "); 5852 fflush(stdout); 5853 do { 5854 c = toupper(getc(stdin)); 5855 while (c != '\n' && getc(stdin) != '\n') 5856 if (feof(stdin)) 5857 return; /* and do not flush */ 5858 } while (c != 'Y' && c != 'N'); 5859 printf("\n"); 5860 if (c == 'N') /* user said no */ 5861 return; 5862 } 5863 /* `ipfw set N flush` - is the same that `ipfw delete set N` */ 5864 if (co.use_set) { 5865 uint32_t arg = ((co.use_set - 1) & 0xffff) | (1 << 24); 5866 if (do_cmd(IP_FW_DEL, &arg, sizeof(arg)) < 0) 5867 err(EX_UNAVAILABLE, "setsockopt(IP_FW_DEL)"); 5868 } else if (do_cmd(cmd, NULL, 0) < 0) 5869 err(EX_UNAVAILABLE, "setsockopt(IP_%s_FLUSH)", 5870 co.do_pipe ? "DUMMYNET" : "FW"); 5871 if (!co.do_quiet) 5872 printf("Flushed all %s.\n", co.do_pipe ? "pipes" : "rules"); 5873} 5874 5875/* 5876 * Free a the (locally allocated) copy of command line arguments. 5877 */ 5878static void 5879free_args(int ac, char **av) 5880{ 5881 int i; 5882 5883 for (i=0; i < ac; i++) 5884 free(av[i]); 5885 free(av); 5886} 5887 5888static void table_list(ipfw_table_entry ent, int need_header); 5889 5890/* 5891 * This one handles all table-related commands 5892 * ipfw table N add addr[/masklen] [value] 5893 * ipfw table N delete addr[/masklen] 5894 * ipfw table {N | all} flush 5895 * ipfw table {N | all} list 5896 */ 5897static void 5898table_handler(int ac, char *av[]) 5899{ 5900 ipfw_table_entry ent; 5901 int do_add; 5902 int is_all; 5903 size_t len; 5904 char *p; 5905 uint32_t a; 5906 uint32_t tables_max; 5907 5908 len = sizeof(tables_max); 5909 if (sysctlbyname("net.inet.ip.fw.tables_max", &tables_max, &len, 5910 NULL, 0) == -1) { 5911#ifdef IPFW_TABLES_MAX 5912 warn("Warn: Failed to get the max tables number via sysctl. " 5913 "Using the compiled in defaults. \nThe reason was"); 5914 tables_max = IPFW_TABLES_MAX; 5915#else 5916 errx(1, "Failed sysctlbyname(\"net.inet.ip.fw.tables_max\")"); 5917#endif 5918 } 5919 5920 ac--; av++; 5921 if (ac && isdigit(**av)) { 5922 ent.tbl = atoi(*av); 5923 is_all = 0; 5924 ac--; av++; 5925 } else if (ac && _substrcmp(*av, "all") == 0) { 5926 ent.tbl = 0; 5927 is_all = 1; 5928 ac--; av++; 5929 } else 5930 errx(EX_USAGE, "table number or 'all' keyword required"); 5931 if (ent.tbl >= tables_max) 5932 errx(EX_USAGE, "The table number exceeds the maximum allowed " 5933 "value (%d)", tables_max - 1); 5934 NEED1("table needs command"); 5935 if (is_all && _substrcmp(*av, "list") != 0 5936 && _substrcmp(*av, "flush") != 0) 5937 errx(EX_USAGE, "table number required"); 5938 5939 if (_substrcmp(*av, "add") == 0 || 5940 _substrcmp(*av, "delete") == 0) { 5941 do_add = **av == 'a'; 5942 ac--; av++; 5943 if (!ac) 5944 errx(EX_USAGE, "IP address required"); 5945 p = strchr(*av, '/'); 5946 if (p) { 5947 *p++ = '\0'; 5948 ent.masklen = atoi(p); 5949 if (ent.masklen > 32) 5950 errx(EX_DATAERR, "bad width ``%s''", p); 5951 } else 5952 ent.masklen = 32; 5953 if (lookup_host(*av, (struct in_addr *)&ent.addr) != 0) 5954 errx(EX_NOHOST, "hostname ``%s'' unknown", *av); 5955 ac--; av++; 5956 if (do_add && ac) { 5957 unsigned int tval; 5958 /* isdigit is a bit of a hack here.. */ 5959 if (strchr(*av, (int)'.') == NULL && isdigit(**av)) { 5960 ent.value = strtoul(*av, NULL, 0); 5961 } else { 5962 if (lookup_host(*av, (struct in_addr *)&tval) == 0) { 5963 /* The value must be stored in host order * 5964 * so that the values < 65k can be distinguished */ 5965 ent.value = ntohl(tval); 5966 } else { 5967 errx(EX_NOHOST, "hostname ``%s'' unknown", *av); 5968 } 5969 } 5970 } else 5971 ent.value = 0; 5972 if (do_cmd(do_add ? IP_FW_TABLE_ADD : IP_FW_TABLE_DEL, 5973 &ent, sizeof(ent)) < 0) { 5974 /* If running silent, don't bomb out on these errors. */ 5975 if (!(co.do_quiet && (errno == (do_add ? EEXIST : ESRCH)))) 5976 err(EX_OSERR, "setsockopt(IP_FW_TABLE_%s)", 5977 do_add ? "ADD" : "DEL"); 5978 /* In silent mode, react to a failed add by deleting */ 5979 if (do_add) { 5980 do_cmd(IP_FW_TABLE_DEL, &ent, sizeof(ent)); 5981 if (do_cmd(IP_FW_TABLE_ADD, 5982 &ent, sizeof(ent)) < 0) 5983 err(EX_OSERR, 5984 "setsockopt(IP_FW_TABLE_ADD)"); 5985 } 5986 } 5987 } else if (_substrcmp(*av, "flush") == 0) { 5988 a = is_all ? tables_max : (ent.tbl + 1); 5989 do { 5990 if (do_cmd(IP_FW_TABLE_FLUSH, &ent.tbl, 5991 sizeof(ent.tbl)) < 0) 5992 err(EX_OSERR, "setsockopt(IP_FW_TABLE_FLUSH)"); 5993 } while (++ent.tbl < a); 5994 } else if (_substrcmp(*av, "list") == 0) { 5995 a = is_all ? tables_max : (ent.tbl + 1); 5996 do { 5997 table_list(ent, is_all); 5998 } while (++ent.tbl < a); 5999 } else 6000 errx(EX_USAGE, "invalid table command %s", *av); 6001} 6002 6003static void 6004table_list(ipfw_table_entry ent, int need_header) 6005{ 6006 ipfw_table *tbl; 6007 socklen_t l; 6008 uint32_t a; 6009 6010 a = ent.tbl; 6011 l = sizeof(a); 6012 if (do_cmd(IP_FW_TABLE_GETSIZE, &a, (uintptr_t)&l) < 0) 6013 err(EX_OSERR, "getsockopt(IP_FW_TABLE_GETSIZE)"); 6014 6015 /* If a is zero we have nothing to do, the table is empty. */ 6016 if (a == 0) 6017 return; 6018 6019 l = sizeof(*tbl) + a * sizeof(ipfw_table_entry); 6020 tbl = safe_calloc(1, l); 6021 tbl->tbl = ent.tbl; 6022 if (do_cmd(IP_FW_TABLE_LIST, tbl, (uintptr_t)&l) < 0) 6023 err(EX_OSERR, "getsockopt(IP_FW_TABLE_LIST)"); 6024 if (tbl->cnt && need_header) 6025 printf("---table(%d)---\n", tbl->tbl); 6026 for (a = 0; a < tbl->cnt; a++) { 6027 unsigned int tval; 6028 tval = tbl->ent[a].value; 6029 if (co.do_value_as_ip) { 6030 char tbuf[128]; 6031 strncpy(tbuf, inet_ntoa(*(struct in_addr *) 6032 &tbl->ent[a].addr), 127); 6033 /* inet_ntoa expects network order */ 6034 tval = htonl(tval); 6035 printf("%s/%u %s\n", tbuf, tbl->ent[a].masklen, 6036 inet_ntoa(*(struct in_addr *)&tval)); 6037 } else { 6038 printf("%s/%u %u\n", 6039 inet_ntoa(*(struct in_addr *)&tbl->ent[a].addr), 6040 tbl->ent[a].masklen, tval); 6041 } 6042 } 6043 free(tbl); 6044} 6045 6046static void 6047show_nat(int ac, char **av) 6048{ 6049 struct cfg_nat *n; 6050 struct cfg_redir *e; 6051 int cmd, i, nbytes, do_cfg, do_rule, frule, lrule, nalloc, size; 6052 int nat_cnt, redir_cnt, r; 6053 uint8_t *data, *p; 6054 char *endptr; 6055 6056 do_rule = 0; 6057 nalloc = 1024; 6058 size = 0; 6059 data = NULL; 6060 frule = 0; 6061 lrule = IPFW_DEFAULT_RULE; /* max ipfw rule number */ 6062 ac--; av++; 6063 6064 if (co.test_only) 6065 return; 6066 6067 /* Parse parameters. */ 6068 for (cmd = IP_FW_NAT_GET_LOG, do_cfg = 0; ac != 0; ac--, av++) { 6069 if (!strncmp(av[0], "config", strlen(av[0]))) { 6070 cmd = IP_FW_NAT_GET_CONFIG, do_cfg = 1; 6071 continue; 6072 } 6073 /* Convert command line rule #. */ 6074 frule = lrule = strtoul(av[0], &endptr, 10); 6075 if (*endptr == '-') 6076 lrule = strtoul(endptr+1, &endptr, 10); 6077 if (lrule == 0) 6078 err(EX_USAGE, "invalid rule number: %s", av[0]); 6079 do_rule = 1; 6080 } 6081 6082 nbytes = nalloc; 6083 while (nbytes >= nalloc) { 6084 nalloc = nalloc * 2; 6085 nbytes = nalloc; 6086 data = safe_realloc(data, nbytes); 6087 if (do_cmd(cmd, data, (uintptr_t)&nbytes) < 0) 6088 err(EX_OSERR, "getsockopt(IP_FW_GET_%s)", 6089 (cmd == IP_FW_NAT_GET_LOG) ? "LOG" : "CONFIG"); 6090 } 6091 if (nbytes == 0) 6092 exit(0); 6093 if (do_cfg) { 6094 nat_cnt = *((int *)data); 6095 for (i = sizeof(nat_cnt); nat_cnt; nat_cnt--) { 6096 n = (struct cfg_nat *)&data[i]; 6097 if (frule <= n->id && lrule >= n->id) 6098 print_nat_config(&data[i]); 6099 i += sizeof(struct cfg_nat); 6100 for (redir_cnt = 0; redir_cnt < n->redir_cnt; redir_cnt++) { 6101 e = (struct cfg_redir *)&data[i]; 6102 i += sizeof(struct cfg_redir) + e->spool_cnt * 6103 sizeof(struct cfg_spool); 6104 } 6105 } 6106 } else { 6107 for (i = 0; 1; i += LIBALIAS_BUF_SIZE + sizeof(int)) { 6108 p = &data[i]; 6109 if (p == data + nbytes) 6110 break; 6111 bcopy(p, &r, sizeof(int)); 6112 if (do_rule) { 6113 if (!(frule <= r && lrule >= r)) 6114 continue; 6115 } 6116 printf("nat %u: %s\n", r, p+sizeof(int)); 6117 } 6118 } 6119} 6120 6121/* 6122 * Called with the arguments, including program name because getopt 6123 * wants it to be present. 6124 * Returns 0 if successful, 1 if empty command, errx() in case of errors. 6125 */ 6126static int 6127ipfw_main(int oldac, char **oldav) 6128{ 6129 int ch, ac, save_ac; 6130 const char *errstr; 6131 char **av, **save_av; 6132 int do_acct = 0; /* Show packet/byte count */ 6133 6134#define WHITESP " \t\f\v\n\r" 6135 if (oldac < 2) 6136 return 1; /* need at least one argument */ 6137 if (oldac == 2) { 6138 /* 6139 * If we are called with a single string, try to split it into 6140 * arguments for subsequent parsing. 6141 * But first, remove spaces after a ',', by copying the string 6142 * in-place. 6143 */ 6144 char *arg = oldav[1]; /* The string is the first arg. */ 6145 int l = strlen(arg); 6146 int copy = 0; /* 1 if we need to copy, 0 otherwise */ 6147 int i, j; 6148 for (i = j = 0; i < l; i++) { 6149 if (arg[i] == '#') /* comment marker */ 6150 break; 6151 if (copy) { 6152 arg[j++] = arg[i]; 6153 copy = !index("," WHITESP, arg[i]); 6154 } else { 6155 copy = !index(WHITESP, arg[i]); 6156 if (copy) 6157 arg[j++] = arg[i]; 6158 } 6159 } 6160 if (!copy && j > 0) /* last char was a 'blank', remove it */ 6161 j--; 6162 l = j; /* the new argument length */ 6163 arg[j++] = '\0'; 6164 if (l == 0) /* empty string! */ 6165 return 1; 6166 6167 /* 6168 * First, count number of arguments. Because of the previous 6169 * processing, this is just the number of blanks plus 1. 6170 */ 6171 for (i = 0, ac = 1; i < l; i++) 6172 if (index(WHITESP, arg[i]) != NULL) 6173 ac++; 6174 6175 /* 6176 * Allocate the argument list, including one entry for 6177 * the program name because getopt expects it. 6178 */ 6179 av = safe_calloc(ac + 1, sizeof(char *)); 6180 6181 /* 6182 * Second, copy arguments from arg[] to av[]. For each one, 6183 * j is the initial character, i is the one past the end. 6184 */ 6185 for (ac = 1, i = j = 0; i < l; i++) 6186 if (index(WHITESP, arg[i]) != NULL || i == l-1) { 6187 if (i == l-1) 6188 i++; 6189 av[ac] = safe_calloc(i-j+1, 1); 6190 bcopy(arg+j, av[ac], i-j); 6191 ac++; 6192 j = i + 1; 6193 } 6194 } else { 6195 /* 6196 * If an argument ends with ',' join with the next one. 6197 */ 6198 int first, i, l; 6199 6200 av = safe_calloc(oldac, sizeof(char *)); 6201 for (first = i = ac = 1, l = 0; i < oldac; i++) { 6202 char *arg = oldav[i]; 6203 int k = strlen(arg); 6204 6205 l += k; 6206 if (arg[k-1] != ',' || i == oldac-1) { 6207 /* Time to copy. */ 6208 av[ac] = safe_calloc(l+1, 1); 6209 for (l=0; first <= i; first++) { 6210 strcat(av[ac]+l, oldav[first]); 6211 l += strlen(oldav[first]); 6212 } 6213 ac++; 6214 l = 0; 6215 first = i+1; 6216 } 6217 } 6218 } 6219 6220 av[0] = strdup(oldav[0]); /* copy progname from the caller */ 6221 /* Set the force flag for non-interactive processes */ 6222 if (!co.do_force) 6223 co.do_force = !isatty(STDIN_FILENO); 6224 6225 /* Save arguments for final freeing of memory. */ 6226 save_ac = ac; 6227 save_av = av; 6228 6229 optind = optreset = 1; /* restart getopt() */ 6230 while ((ch = getopt(ac, av, "abcdefhinNqs:STtv")) != -1) 6231 switch (ch) { 6232 case 'a': 6233 do_acct = 1; 6234 break; 6235 6236 case 'b': 6237 co.comment_only = 1; 6238 co.do_compact = 1; 6239 break; 6240 6241 case 'c': 6242 co.do_compact = 1; 6243 break; 6244 6245 case 'd': 6246 co.do_dynamic = 1; 6247 break; 6248 6249 case 'e': 6250 co.do_expired = 1; 6251 break; 6252 6253 case 'f': 6254 co.do_force = 1; 6255 break; 6256 6257 case 'h': /* help */ 6258 free_args(save_ac, save_av); 6259 help(); 6260 break; /* NOTREACHED */ 6261 6262 case 'i': 6263 co.do_value_as_ip = 1; 6264 break; 6265 6266 case 'n': 6267 co.test_only = 1; 6268 break; 6269 6270 case 'N': 6271 co.do_resolv = 1; 6272 break; 6273 6274 case 'q': 6275 co.do_quiet = 1; 6276 break; 6277 6278 case 's': /* sort */ 6279 co.do_sort = atoi(optarg); 6280 break; 6281 6282 case 'S': 6283 co.show_sets = 1; 6284 break; 6285 6286 case 't': 6287 co.do_time = 1; 6288 break; 6289 6290 case 'T': 6291 co.do_time = 2; /* numeric timestamp */ 6292 break; 6293 6294 case 'v': /* verbose */ 6295 co.verbose = 1; 6296 break; 6297 6298 default: 6299 free_args(save_ac, save_av); 6300 return 1; 6301 } 6302 6303 ac -= optind; 6304 av += optind; 6305 NEED1("bad arguments, for usage summary ``ipfw''"); 6306 6307 /* 6308 * An undocumented behaviour of ipfw1 was to allow rule numbers first, 6309 * e.g. "100 add allow ..." instead of "add 100 allow ...". 6310 * In case, swap first and second argument to get the normal form. 6311 */ 6312 if (ac > 1 && isdigit(*av[0])) { 6313 char *p = av[0]; 6314 6315 av[0] = av[1]; 6316 av[1] = p; 6317 } 6318 6319 /* 6320 * Optional: pipe, queue or nat. 6321 */ 6322 co.do_nat = 0; 6323 co.do_pipe = 0; 6324 if (!strncmp(*av, "nat", strlen(*av))) 6325 co.do_nat = 1; 6326 else if (!strncmp(*av, "pipe", strlen(*av))) 6327 co.do_pipe = 1; 6328 else if (_substrcmp(*av, "queue") == 0) 6329 co.do_pipe = 2; 6330 else if (!strncmp(*av, "set", strlen(*av))) { 6331 if (ac > 1 && isdigit(av[1][0])) { 6332 co.use_set = strtonum(av[1], 0, RESVD_SET, &errstr); 6333 if (errstr) 6334 errx(EX_DATAERR, 6335 "invalid set number %s\n", av[1]); 6336 ac -= 2; av += 2; co.use_set++; 6337 } 6338 } 6339 6340 if (co.do_pipe || co.do_nat) { 6341 ac--; 6342 av++; 6343 } 6344 NEED1("missing command"); 6345 6346 /* 6347 * For pipes, queues and nats we normally say 'nat|pipe NN config' 6348 * but the code is easier to parse as 'nat|pipe config NN' 6349 * so we swap the two arguments. 6350 */ 6351 if ((co.do_pipe || co.do_nat) && ac > 1 && isdigit(*av[0])) { 6352 char *p = av[0]; 6353 6354 av[0] = av[1]; 6355 av[1] = p; 6356 } 6357 6358 int try_next = 0; 6359 if (co.use_set == 0) { 6360 if (_substrcmp(*av, "add") == 0) 6361 add(ac, av); 6362 else if (co.do_nat && _substrcmp(*av, "show") == 0) 6363 show_nat(ac, av); 6364 else if (co.do_pipe && _substrcmp(*av, "config") == 0) 6365 config_pipe(ac, av); 6366 else if (co.do_nat && _substrcmp(*av, "config") == 0) 6367 config_nat(ac, av); 6368 else if (_substrcmp(*av, "set") == 0) 6369 sets_handler(ac, av); 6370 else if (_substrcmp(*av, "table") == 0) 6371 table_handler(ac, av); 6372 else if (_substrcmp(*av, "enable") == 0) 6373 sysctl_handler(ac, av, 1); 6374 else if (_substrcmp(*av, "disable") == 0) 6375 sysctl_handler(ac, av, 0); 6376 else 6377 try_next = 1; 6378 } 6379 6380 if (co.use_set || try_next) { 6381 if (_substrcmp(*av, "delete") == 0) 6382 delete(ac, av); 6383 else if (_substrcmp(*av, "flush") == 0) 6384 flush(co.do_force); 6385 else if (_substrcmp(*av, "zero") == 0) 6386 zero(ac, av, IP_FW_ZERO); 6387 else if (_substrcmp(*av, "resetlog") == 0) 6388 zero(ac, av, IP_FW_RESETLOG); 6389 else if (_substrcmp(*av, "print") == 0 || 6390 _substrcmp(*av, "list") == 0) 6391 list(ac, av, do_acct); 6392 else if (_substrcmp(*av, "show") == 0) 6393 list(ac, av, 1 /* show counters */); 6394 else 6395 errx(EX_USAGE, "bad command `%s'", *av); 6396 } 6397 6398 /* Free memory allocated in the argument parsing. */ 6399 free_args(save_ac, save_av); 6400 return 0; 6401} 6402 6403 6404static void 6405ipfw_readfile(int ac, char *av[]) 6406{ 6407#define MAX_ARGS 32 6408 char buf[BUFSIZ]; 6409 char *progname = av[0]; /* original program name */ 6410 const char *cmd = NULL; /* preprocessor name, if any */ 6411 const char *filename = av[ac-1]; /* file to read */ 6412 int c, lineno=0; 6413 FILE *f = NULL; 6414 pid_t preproc = 0; 6415 6416 while ((c = getopt(ac, av, "cfNnp:qS")) != -1) { 6417 switch(c) { 6418 case 'c': 6419 co.do_compact = 1; 6420 break; 6421 6422 case 'f': 6423 co.do_force = 1; 6424 break; 6425 6426 case 'N': 6427 co.do_resolv = 1; 6428 break; 6429 6430 case 'n': 6431 co.test_only = 1; 6432 break; 6433 6434 case 'p': 6435 /* 6436 * ipfw -p cmd [args] filename 6437 * 6438 * We are done with getopt(). All arguments 6439 * except the filename go to the preprocessor, 6440 * so we need to do the following: 6441 * - check that a filename is actually present; 6442 * - advance av by optind-1 to skip arguments 6443 * already processed; 6444 * - decrease ac by optind, to remove the args 6445 * already processed and the final filename; 6446 * - set the last entry in av[] to NULL so 6447 * popen() can detect the end of the array; 6448 * - set optind=ac to let getopt() terminate. 6449 */ 6450 if (optind == ac) 6451 errx(EX_USAGE, "no filename argument"); 6452 cmd = optarg; 6453 av[ac-1] = NULL; 6454 av += optind - 1; 6455 ac -= optind; 6456 optind = ac; 6457 break; 6458 6459 case 'q': 6460 co.do_quiet = 1; 6461 break; 6462 6463 case 'S': 6464 co.show_sets = 1; 6465 break; 6466 6467 default: 6468 errx(EX_USAGE, "bad arguments, for usage" 6469 " summary ``ipfw''"); 6470 } 6471 6472 } 6473 6474 if (cmd == NULL && ac != optind + 1) { 6475 fprintf(stderr, "ac %d, optind %d\n", ac, optind); 6476 errx(EX_USAGE, "extraneous filename arguments"); 6477 } 6478 6479 if ((f = fopen(filename, "r")) == NULL) 6480 err(EX_UNAVAILABLE, "fopen: %s", filename); 6481 6482 if (cmd != NULL) { /* pipe through preprocessor */ 6483 int pipedes[2]; 6484 6485 if (pipe(pipedes) == -1) 6486 err(EX_OSERR, "cannot create pipe"); 6487 6488 preproc = fork(); 6489 if (preproc == -1) 6490 err(EX_OSERR, "cannot fork"); 6491 6492 if (preproc == 0) { 6493 /* 6494 * Child, will run the preprocessor with the 6495 * file on stdin and the pipe on stdout. 6496 */ 6497 if (dup2(fileno(f), 0) == -1 6498 || dup2(pipedes[1], 1) == -1) 6499 err(EX_OSERR, "dup2()"); 6500 fclose(f); 6501 close(pipedes[1]); 6502 close(pipedes[0]); 6503 execvp(cmd, av); 6504 err(EX_OSERR, "execvp(%s) failed", cmd); 6505 } else { /* parent, will reopen f as the pipe */ 6506 fclose(f); 6507 close(pipedes[1]); 6508 if ((f = fdopen(pipedes[0], "r")) == NULL) { 6509 int savederrno = errno; 6510 6511 (void)kill(preproc, SIGTERM); 6512 errno = savederrno; 6513 err(EX_OSERR, "fdopen()"); 6514 } 6515 } 6516 } 6517 6518 while (fgets(buf, BUFSIZ, f)) { /* read commands */ 6519 char linename[10]; 6520 char *args[2]; 6521 6522 lineno++; 6523 sprintf(linename, "Line %d", lineno); 6524 setprogname(linename); /* XXX */ 6525 args[0] = progname; 6526 args[1] = buf; 6527 ipfw_main(2, args); 6528 } 6529 fclose(f); 6530 if (cmd != NULL) { 6531 int status; 6532 6533 if (waitpid(preproc, &status, 0) == -1) 6534 errx(EX_OSERR, "waitpid()"); 6535 if (WIFEXITED(status) && WEXITSTATUS(status) != EX_OK) 6536 errx(EX_UNAVAILABLE, 6537 "preprocessor exited with status %d", 6538 WEXITSTATUS(status)); 6539 else if (WIFSIGNALED(status)) 6540 errx(EX_UNAVAILABLE, 6541 "preprocessor exited with signal %d", 6542 WTERMSIG(status)); 6543 } 6544} 6545 6546int 6547main(int ac, char *av[]) 6548{ 6549 /* 6550 * If the last argument is an absolute pathname, interpret it 6551 * as a file to be preprocessed. 6552 */ 6553 6554 if (ac > 1 && av[ac - 1][0] == '/' && access(av[ac - 1], R_OK) == 0) 6555 ipfw_readfile(ac, av); 6556 else { 6557 if (ipfw_main(ac, av)) 6558 show_usage(); 6559 } 6560 return EX_OK; 6561} 6562