ipfw2.c revision 187713
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 187713 2009-01-26 14:03:39Z 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 62int 63 do_value_as_ip, /* show table value as IP */ 64 do_resolv, /* Would try to resolve all */ 65 do_time, /* Show time stamps */ 66 do_quiet, /* Be quiet in add and flush */ 67 do_pipe, /* this cmd refers to a pipe */ 68 do_nat, /* Nat configuration. */ 69 do_sort, /* field to sort results (0 = no) */ 70 do_dynamic, /* display dynamic rules */ 71 do_expired, /* display expired dynamic rules */ 72 do_compact, /* show rules in compact mode */ 73 do_force, /* do not ask for confirmation */ 74 use_set, /* work with specified set number */ 75 show_sets, /* display rule sets */ 76 test_only, /* only check syntax */ 77 comment_only, /* only print action and comment */ 78 verbose; 79 80#define IP_MASK_ALL 0xffffffff 81/* 82 * the following macro returns an error message if we run out of 83 * arguments. 84 */ 85#define NEED1(msg) {if (!ac) errx(EX_USAGE, msg);} 86 87#define GET_UINT_ARG(arg, min, max, tok, s_x) do { \ 88 if (!ac) \ 89 errx(EX_USAGE, "%s: missing argument", match_value(s_x, tok)); \ 90 if (_substrcmp(*av, "tablearg") == 0) { \ 91 arg = IP_FW_TABLEARG; \ 92 break; \ 93 } \ 94 \ 95 { \ 96 long val; \ 97 char *end; \ 98 \ 99 val = strtol(*av, &end, 10); \ 100 \ 101 if (!isdigit(**av) || *end != '\0' || (val == 0 && errno == EINVAL)) \ 102 errx(EX_DATAERR, "%s: invalid argument: %s", \ 103 match_value(s_x, tok), *av); \ 104 \ 105 if (errno == ERANGE || val < min || val > max) \ 106 errx(EX_DATAERR, "%s: argument is out of range (%u..%u): %s", \ 107 match_value(s_x, tok), min, max, *av); \ 108 \ 109 if (val == IP_FW_TABLEARG) \ 110 errx(EX_DATAERR, "%s: illegal argument value: %s", \ 111 match_value(s_x, tok), *av); \ 112 arg = val; \ 113 } \ 114} while (0) 115 116#define PRINT_UINT_ARG(str, arg) do { \ 117 if (str != NULL) \ 118 printf("%s",str); \ 119 if (arg == IP_FW_TABLEARG) \ 120 printf("tablearg"); \ 121 else \ 122 printf("%u", (uint32_t)arg); \ 123} while (0) 124 125/* 126 * _s_x is a structure that stores a string <-> token pairs, used in 127 * various places in the parser. Entries are stored in arrays, 128 * with an entry with s=NULL as terminator. 129 * The search routines are match_token() and match_value(). 130 * Often, an element with x=0 contains an error string. 131 * 132 */ 133struct _s_x { 134 char const *s; 135 int x; 136}; 137 138static struct _s_x f_tcpflags[] = { 139 { "syn", TH_SYN }, 140 { "fin", TH_FIN }, 141 { "ack", TH_ACK }, 142 { "psh", TH_PUSH }, 143 { "rst", TH_RST }, 144 { "urg", TH_URG }, 145 { "tcp flag", 0 }, 146 { NULL, 0 } 147}; 148 149static struct _s_x f_tcpopts[] = { 150 { "mss", IP_FW_TCPOPT_MSS }, 151 { "maxseg", IP_FW_TCPOPT_MSS }, 152 { "window", IP_FW_TCPOPT_WINDOW }, 153 { "sack", IP_FW_TCPOPT_SACK }, 154 { "ts", IP_FW_TCPOPT_TS }, 155 { "timestamp", IP_FW_TCPOPT_TS }, 156 { "cc", IP_FW_TCPOPT_CC }, 157 { "tcp option", 0 }, 158 { NULL, 0 } 159}; 160 161/* 162 * IP options span the range 0 to 255 so we need to remap them 163 * (though in fact only the low 5 bits are significant). 164 */ 165static struct _s_x f_ipopts[] = { 166 { "ssrr", IP_FW_IPOPT_SSRR}, 167 { "lsrr", IP_FW_IPOPT_LSRR}, 168 { "rr", IP_FW_IPOPT_RR}, 169 { "ts", IP_FW_IPOPT_TS}, 170 { "ip option", 0 }, 171 { NULL, 0 } 172}; 173 174static struct _s_x f_iptos[] = { 175 { "lowdelay", IPTOS_LOWDELAY}, 176 { "throughput", IPTOS_THROUGHPUT}, 177 { "reliability", IPTOS_RELIABILITY}, 178 { "mincost", IPTOS_MINCOST}, 179 { "congestion", IPTOS_ECN_CE}, 180 { "ecntransport", IPTOS_ECN_ECT0}, 181 { "ip tos option", 0}, 182 { NULL, 0 } 183}; 184 185static struct _s_x limit_masks[] = { 186 {"all", DYN_SRC_ADDR|DYN_SRC_PORT|DYN_DST_ADDR|DYN_DST_PORT}, 187 {"src-addr", DYN_SRC_ADDR}, 188 {"src-port", DYN_SRC_PORT}, 189 {"dst-addr", DYN_DST_ADDR}, 190 {"dst-port", DYN_DST_PORT}, 191 {NULL, 0} 192}; 193 194/* 195 * we use IPPROTO_ETHERTYPE as a fake protocol id to call the print routines 196 * This is only used in this code. 197 */ 198#define IPPROTO_ETHERTYPE 0x1000 199static struct _s_x ether_types[] = { 200 /* 201 * Note, we cannot use "-:&/" in the names because they are field 202 * separators in the type specifications. Also, we use s = NULL as 203 * end-delimiter, because a type of 0 can be legal. 204 */ 205 { "ip", 0x0800 }, 206 { "ipv4", 0x0800 }, 207 { "ipv6", 0x86dd }, 208 { "arp", 0x0806 }, 209 { "rarp", 0x8035 }, 210 { "vlan", 0x8100 }, 211 { "loop", 0x9000 }, 212 { "trail", 0x1000 }, 213 { "at", 0x809b }, 214 { "atalk", 0x809b }, 215 { "aarp", 0x80f3 }, 216 { "pppoe_disc", 0x8863 }, 217 { "pppoe_sess", 0x8864 }, 218 { "ipx_8022", 0x00E0 }, 219 { "ipx_8023", 0x0000 }, 220 { "ipx_ii", 0x8137 }, 221 { "ipx_snap", 0x8137 }, 222 { "ipx", 0x8137 }, 223 { "ns", 0x0600 }, 224 { NULL, 0 } 225}; 226 227static void show_usage(void); 228 229enum tokens { 230 TOK_NULL=0, 231 232 TOK_OR, 233 TOK_NOT, 234 TOK_STARTBRACE, 235 TOK_ENDBRACE, 236 237 TOK_ACCEPT, 238 TOK_COUNT, 239 TOK_PIPE, 240 TOK_QUEUE, 241 TOK_DIVERT, 242 TOK_TEE, 243 TOK_NETGRAPH, 244 TOK_NGTEE, 245 TOK_FORWARD, 246 TOK_SKIPTO, 247 TOK_DENY, 248 TOK_REJECT, 249 TOK_RESET, 250 TOK_UNREACH, 251 TOK_CHECKSTATE, 252 TOK_NAT, 253 254 TOK_ALTQ, 255 TOK_LOG, 256 TOK_TAG, 257 TOK_UNTAG, 258 259 TOK_TAGGED, 260 TOK_UID, 261 TOK_GID, 262 TOK_JAIL, 263 TOK_IN, 264 TOK_LIMIT, 265 TOK_KEEPSTATE, 266 TOK_LAYER2, 267 TOK_OUT, 268 TOK_DIVERTED, 269 TOK_DIVERTEDLOOPBACK, 270 TOK_DIVERTEDOUTPUT, 271 TOK_XMIT, 272 TOK_RECV, 273 TOK_VIA, 274 TOK_FRAG, 275 TOK_IPOPTS, 276 TOK_IPLEN, 277 TOK_IPID, 278 TOK_IPPRECEDENCE, 279 TOK_IPTOS, 280 TOK_IPTTL, 281 TOK_IPVER, 282 TOK_ESTAB, 283 TOK_SETUP, 284 TOK_TCPDATALEN, 285 TOK_TCPFLAGS, 286 TOK_TCPOPTS, 287 TOK_TCPSEQ, 288 TOK_TCPACK, 289 TOK_TCPWIN, 290 TOK_ICMPTYPES, 291 TOK_MAC, 292 TOK_MACTYPE, 293 TOK_VERREVPATH, 294 TOK_VERSRCREACH, 295 TOK_ANTISPOOF, 296 TOK_IPSEC, 297 TOK_COMMENT, 298 299 TOK_PLR, 300 TOK_NOERROR, 301 TOK_BUCKETS, 302 TOK_DSTIP, 303 TOK_SRCIP, 304 TOK_DSTPORT, 305 TOK_SRCPORT, 306 TOK_ALL, 307 TOK_MASK, 308 TOK_BW, 309 TOK_DELAY, 310 TOK_RED, 311 TOK_GRED, 312 TOK_DROPTAIL, 313 TOK_PROTO, 314 TOK_WEIGHT, 315 TOK_IP, 316 TOK_IF, 317 TOK_ALOG, 318 TOK_DENY_INC, 319 TOK_SAME_PORTS, 320 TOK_UNREG_ONLY, 321 TOK_RESET_ADDR, 322 TOK_ALIAS_REV, 323 TOK_PROXY_ONLY, 324 TOK_REDIR_ADDR, 325 TOK_REDIR_PORT, 326 TOK_REDIR_PROTO, 327 328 TOK_IPV6, 329 TOK_FLOWID, 330 TOK_ICMP6TYPES, 331 TOK_EXT6HDR, 332 TOK_DSTIP6, 333 TOK_SRCIP6, 334 335 TOK_IPV4, 336 TOK_UNREACH6, 337 TOK_RESET6, 338 339 TOK_FIB, 340 TOK_SETFIB, 341}; 342 343struct _s_x dummynet_params[] = { 344 { "plr", TOK_PLR }, 345 { "noerror", TOK_NOERROR }, 346 { "buckets", TOK_BUCKETS }, 347 { "dst-ip", TOK_DSTIP }, 348 { "src-ip", TOK_SRCIP }, 349 { "dst-port", TOK_DSTPORT }, 350 { "src-port", TOK_SRCPORT }, 351 { "proto", TOK_PROTO }, 352 { "weight", TOK_WEIGHT }, 353 { "all", TOK_ALL }, 354 { "mask", TOK_MASK }, 355 { "droptail", TOK_DROPTAIL }, 356 { "red", TOK_RED }, 357 { "gred", TOK_GRED }, 358 { "bw", TOK_BW }, 359 { "bandwidth", TOK_BW }, 360 { "delay", TOK_DELAY }, 361 { "pipe", TOK_PIPE }, 362 { "queue", TOK_QUEUE }, 363 { "flow-id", TOK_FLOWID}, 364 { "dst-ipv6", TOK_DSTIP6}, 365 { "dst-ip6", TOK_DSTIP6}, 366 { "src-ipv6", TOK_SRCIP6}, 367 { "src-ip6", TOK_SRCIP6}, 368 { "dummynet-params", TOK_NULL }, 369 { NULL, 0 } /* terminator */ 370}; 371 372struct _s_x nat_params[] = { 373 { "ip", TOK_IP }, 374 { "if", TOK_IF }, 375 { "log", TOK_ALOG }, 376 { "deny_in", TOK_DENY_INC }, 377 { "same_ports", TOK_SAME_PORTS }, 378 { "unreg_only", TOK_UNREG_ONLY }, 379 { "reset", TOK_RESET_ADDR }, 380 { "reverse", TOK_ALIAS_REV }, 381 { "proxy_only", TOK_PROXY_ONLY }, 382 { "redirect_addr", TOK_REDIR_ADDR }, 383 { "redirect_port", TOK_REDIR_PORT }, 384 { "redirect_proto", TOK_REDIR_PROTO }, 385 { NULL, 0 } /* terminator */ 386}; 387 388struct _s_x rule_actions[] = { 389 { "accept", TOK_ACCEPT }, 390 { "pass", TOK_ACCEPT }, 391 { "allow", TOK_ACCEPT }, 392 { "permit", TOK_ACCEPT }, 393 { "count", TOK_COUNT }, 394 { "pipe", TOK_PIPE }, 395 { "queue", TOK_QUEUE }, 396 { "divert", TOK_DIVERT }, 397 { "tee", TOK_TEE }, 398 { "netgraph", TOK_NETGRAPH }, 399 { "ngtee", TOK_NGTEE }, 400 { "fwd", TOK_FORWARD }, 401 { "forward", TOK_FORWARD }, 402 { "skipto", TOK_SKIPTO }, 403 { "deny", TOK_DENY }, 404 { "drop", TOK_DENY }, 405 { "reject", TOK_REJECT }, 406 { "reset6", TOK_RESET6 }, 407 { "reset", TOK_RESET }, 408 { "unreach6", TOK_UNREACH6 }, 409 { "unreach", TOK_UNREACH }, 410 { "check-state", TOK_CHECKSTATE }, 411 { "//", TOK_COMMENT }, 412 { "nat", TOK_NAT }, 413 { "setfib", TOK_SETFIB }, 414 { NULL, 0 } /* terminator */ 415}; 416 417struct _s_x rule_action_params[] = { 418 { "altq", TOK_ALTQ }, 419 { "log", TOK_LOG }, 420 { "tag", TOK_TAG }, 421 { "untag", TOK_UNTAG }, 422 { NULL, 0 } /* terminator */ 423}; 424 425struct _s_x rule_options[] = { 426 { "tagged", TOK_TAGGED }, 427 { "uid", TOK_UID }, 428 { "gid", TOK_GID }, 429 { "jail", TOK_JAIL }, 430 { "in", TOK_IN }, 431 { "limit", TOK_LIMIT }, 432 { "keep-state", TOK_KEEPSTATE }, 433 { "bridged", TOK_LAYER2 }, 434 { "layer2", TOK_LAYER2 }, 435 { "out", TOK_OUT }, 436 { "diverted", TOK_DIVERTED }, 437 { "diverted-loopback", TOK_DIVERTEDLOOPBACK }, 438 { "diverted-output", TOK_DIVERTEDOUTPUT }, 439 { "xmit", TOK_XMIT }, 440 { "recv", TOK_RECV }, 441 { "via", TOK_VIA }, 442 { "fragment", TOK_FRAG }, 443 { "frag", TOK_FRAG }, 444 { "fib", TOK_FIB }, 445 { "ipoptions", TOK_IPOPTS }, 446 { "ipopts", TOK_IPOPTS }, 447 { "iplen", TOK_IPLEN }, 448 { "ipid", TOK_IPID }, 449 { "ipprecedence", TOK_IPPRECEDENCE }, 450 { "iptos", TOK_IPTOS }, 451 { "ipttl", TOK_IPTTL }, 452 { "ipversion", TOK_IPVER }, 453 { "ipver", TOK_IPVER }, 454 { "estab", TOK_ESTAB }, 455 { "established", TOK_ESTAB }, 456 { "setup", TOK_SETUP }, 457 { "tcpdatalen", TOK_TCPDATALEN }, 458 { "tcpflags", TOK_TCPFLAGS }, 459 { "tcpflgs", TOK_TCPFLAGS }, 460 { "tcpoptions", TOK_TCPOPTS }, 461 { "tcpopts", TOK_TCPOPTS }, 462 { "tcpseq", TOK_TCPSEQ }, 463 { "tcpack", TOK_TCPACK }, 464 { "tcpwin", TOK_TCPWIN }, 465 { "icmptype", TOK_ICMPTYPES }, 466 { "icmptypes", TOK_ICMPTYPES }, 467 { "dst-ip", TOK_DSTIP }, 468 { "src-ip", TOK_SRCIP }, 469 { "dst-port", TOK_DSTPORT }, 470 { "src-port", TOK_SRCPORT }, 471 { "proto", TOK_PROTO }, 472 { "MAC", TOK_MAC }, 473 { "mac", TOK_MAC }, 474 { "mac-type", TOK_MACTYPE }, 475 { "verrevpath", TOK_VERREVPATH }, 476 { "versrcreach", TOK_VERSRCREACH }, 477 { "antispoof", TOK_ANTISPOOF }, 478 { "ipsec", TOK_IPSEC }, 479 { "icmp6type", TOK_ICMP6TYPES }, 480 { "icmp6types", TOK_ICMP6TYPES }, 481 { "ext6hdr", TOK_EXT6HDR}, 482 { "flow-id", TOK_FLOWID}, 483 { "ipv6", TOK_IPV6}, 484 { "ip6", TOK_IPV6}, 485 { "ipv4", TOK_IPV4}, 486 { "ip4", TOK_IPV4}, 487 { "dst-ipv6", TOK_DSTIP6}, 488 { "dst-ip6", TOK_DSTIP6}, 489 { "src-ipv6", TOK_SRCIP6}, 490 { "src-ip6", TOK_SRCIP6}, 491 { "//", TOK_COMMENT }, 492 493 { "not", TOK_NOT }, /* pseudo option */ 494 { "!", /* escape ? */ TOK_NOT }, /* pseudo option */ 495 { "or", TOK_OR }, /* pseudo option */ 496 { "|", /* escape */ TOK_OR }, /* pseudo option */ 497 { "{", TOK_STARTBRACE }, /* pseudo option */ 498 { "(", TOK_STARTBRACE }, /* pseudo option */ 499 { "}", TOK_ENDBRACE }, /* pseudo option */ 500 { ")", TOK_ENDBRACE }, /* pseudo option */ 501 { NULL, 0 } /* terminator */ 502}; 503 504#define TABLEARG "tablearg" 505 506static __inline uint64_t 507align_uint64(uint64_t *pll) { 508 uint64_t ret; 509 510 bcopy (pll, &ret, sizeof(ret)); 511 return ret; 512} 513 514/* 515 * conditionally runs the command. 516 */ 517static int 518do_cmd(int optname, void *optval, uintptr_t optlen) 519{ 520 static int s = -1; /* the socket */ 521 int i; 522 523 if (test_only) 524 return 0; 525 526 if (s == -1) 527 s = socket(AF_INET, SOCK_RAW, IPPROTO_RAW); 528 if (s < 0) 529 err(EX_UNAVAILABLE, "socket"); 530 531 if (optname == IP_FW_GET || optname == IP_DUMMYNET_GET || 532 optname == IP_FW_ADD || optname == IP_FW_TABLE_LIST || 533 optname == IP_FW_TABLE_GETSIZE || 534 optname == IP_FW_NAT_GET_CONFIG || 535 optname == IP_FW_NAT_GET_LOG) 536 i = getsockopt(s, IPPROTO_IP, optname, optval, 537 (socklen_t *)optlen); 538 else 539 i = setsockopt(s, IPPROTO_IP, optname, optval, optlen); 540 return i; 541} 542 543/** 544 * match_token takes a table and a string, returns the value associated 545 * with the string (-1 in case of failure). 546 */ 547static int 548match_token(struct _s_x *table, char *string) 549{ 550 struct _s_x *pt; 551 uint i = strlen(string); 552 553 for (pt = table ; i && pt->s != NULL ; pt++) 554 if (strlen(pt->s) == i && !bcmp(string, pt->s, i)) 555 return pt->x; 556 return -1; 557} 558 559/** 560 * match_value takes a table and a value, returns the string associated 561 * with the value (NULL in case of failure). 562 */ 563static char const * 564match_value(struct _s_x *p, int value) 565{ 566 for (; p->s != NULL; p++) 567 if (p->x == value) 568 return p->s; 569 return NULL; 570} 571 572/* 573 * _substrcmp takes two strings and returns 1 if they do not match, 574 * and 0 if they match exactly or the first string is a sub-string 575 * of the second. A warning is printed to stderr in the case that the 576 * first string is a sub-string of the second. 577 * 578 * This function will be removed in the future through the usual 579 * deprecation process. 580 */ 581static int 582_substrcmp(const char *str1, const char* str2) 583{ 584 585 if (strncmp(str1, str2, strlen(str1)) != 0) 586 return 1; 587 588 if (strlen(str1) != strlen(str2)) 589 warnx("DEPRECATED: '%s' matched '%s' as a sub-string", 590 str1, str2); 591 return 0; 592} 593 594/* 595 * _substrcmp2 takes three strings and returns 1 if the first two do not match, 596 * and 0 if they match exactly or the second string is a sub-string 597 * of the first. A warning is printed to stderr in the case that the 598 * first string does not match the third. 599 * 600 * This function exists to warn about the bizzare construction 601 * strncmp(str, "by", 2) which is used to allow people to use a shotcut 602 * for "bytes". The problem is that in addition to accepting "by", 603 * "byt", "byte", and "bytes", it also excepts "by_rabid_dogs" and any 604 * other string beginning with "by". 605 * 606 * This function will be removed in the future through the usual 607 * deprecation process. 608 */ 609static int 610_substrcmp2(const char *str1, const char* str2, const char* str3) 611{ 612 613 if (strncmp(str1, str2, strlen(str2)) != 0) 614 return 1; 615 616 if (strcmp(str1, str3) != 0) 617 warnx("DEPRECATED: '%s' matched '%s'", 618 str1, str3); 619 return 0; 620} 621 622/* 623 * prints one port, symbolic or numeric 624 */ 625static void 626print_port(int proto, uint16_t port) 627{ 628 629 if (proto == IPPROTO_ETHERTYPE) { 630 char const *s; 631 632 if (do_resolv && (s = match_value(ether_types, port)) ) 633 printf("%s", s); 634 else 635 printf("0x%04x", port); 636 } else { 637 struct servent *se = NULL; 638 if (do_resolv) { 639 struct protoent *pe = getprotobynumber(proto); 640 641 se = getservbyport(htons(port), pe ? pe->p_name : NULL); 642 } 643 if (se) 644 printf("%s", se->s_name); 645 else 646 printf("%d", port); 647 } 648} 649 650struct _s_x _port_name[] = { 651 {"dst-port", O_IP_DSTPORT}, 652 {"src-port", O_IP_SRCPORT}, 653 {"ipid", O_IPID}, 654 {"iplen", O_IPLEN}, 655 {"ipttl", O_IPTTL}, 656 {"mac-type", O_MAC_TYPE}, 657 {"tcpdatalen", O_TCPDATALEN}, 658 {"tagged", O_TAGGED}, 659 {NULL, 0} 660}; 661 662/* 663 * Print the values in a list 16-bit items of the types above. 664 * XXX todo: add support for mask. 665 */ 666static void 667print_newports(ipfw_insn_u16 *cmd, int proto, int opcode) 668{ 669 uint16_t *p = cmd->ports; 670 int i; 671 char const *sep; 672 673 if (opcode != 0) { 674 sep = match_value(_port_name, opcode); 675 if (sep == NULL) 676 sep = "???"; 677 printf (" %s", sep); 678 } 679 sep = " "; 680 for (i = F_LEN((ipfw_insn *)cmd) - 1; i > 0; i--, p += 2) { 681 printf(sep); 682 print_port(proto, p[0]); 683 if (p[0] != p[1]) { 684 printf("-"); 685 print_port(proto, p[1]); 686 } 687 sep = ","; 688 } 689} 690 691/* 692 * Like strtol, but also translates service names into port numbers 693 * for some protocols. 694 * In particular: 695 * proto == -1 disables the protocol check; 696 * proto == IPPROTO_ETHERTYPE looks up an internal table 697 * proto == <some value in /etc/protocols> matches the values there. 698 * Returns *end == s in case the parameter is not found. 699 */ 700static int 701strtoport(char *s, char **end, int base, int proto) 702{ 703 char *p, *buf; 704 char *s1; 705 int i; 706 707 *end = s; /* default - not found */ 708 if (*s == '\0') 709 return 0; /* not found */ 710 711 if (isdigit(*s)) 712 return strtol(s, end, base); 713 714 /* 715 * find separator. '\\' escapes the next char. 716 */ 717 for (s1 = s; *s1 && (isalnum(*s1) || *s1 == '\\') ; s1++) 718 if (*s1 == '\\' && s1[1] != '\0') 719 s1++; 720 721 buf = malloc(s1 - s + 1); 722 if (buf == NULL) 723 return 0; 724 725 /* 726 * copy into a buffer skipping backslashes 727 */ 728 for (p = s, i = 0; p != s1 ; p++) 729 if (*p != '\\') 730 buf[i++] = *p; 731 buf[i++] = '\0'; 732 733 if (proto == IPPROTO_ETHERTYPE) { 734 i = match_token(ether_types, buf); 735 free(buf); 736 if (i != -1) { /* found */ 737 *end = s1; 738 return i; 739 } 740 } else { 741 struct protoent *pe = NULL; 742 struct servent *se; 743 744 if (proto != 0) 745 pe = getprotobynumber(proto); 746 setservent(1); 747 se = getservbyname(buf, pe ? pe->p_name : NULL); 748 free(buf); 749 if (se != NULL) { 750 *end = s1; 751 return ntohs(se->s_port); 752 } 753 } 754 return 0; /* not found */ 755} 756 757/* 758 * Map between current altq queue id numbers and names. 759 */ 760static int altq_fetched = 0; 761static TAILQ_HEAD(, pf_altq) altq_entries = 762 TAILQ_HEAD_INITIALIZER(altq_entries); 763 764static void 765altq_set_enabled(int enabled) 766{ 767 int pffd; 768 769 pffd = open("/dev/pf", O_RDWR); 770 if (pffd == -1) 771 err(EX_UNAVAILABLE, 772 "altq support opening pf(4) control device"); 773 if (enabled) { 774 if (ioctl(pffd, DIOCSTARTALTQ) != 0 && errno != EEXIST) 775 err(EX_UNAVAILABLE, "enabling altq"); 776 } else { 777 if (ioctl(pffd, DIOCSTOPALTQ) != 0 && errno != ENOENT) 778 err(EX_UNAVAILABLE, "disabling altq"); 779 } 780 close(pffd); 781} 782 783static void 784altq_fetch(void) 785{ 786 struct pfioc_altq pfioc; 787 struct pf_altq *altq; 788 int pffd; 789 unsigned int mnr; 790 791 if (altq_fetched) 792 return; 793 altq_fetched = 1; 794 pffd = open("/dev/pf", O_RDONLY); 795 if (pffd == -1) { 796 warn("altq support opening pf(4) control device"); 797 return; 798 } 799 bzero(&pfioc, sizeof(pfioc)); 800 if (ioctl(pffd, DIOCGETALTQS, &pfioc) != 0) { 801 warn("altq support getting queue list"); 802 close(pffd); 803 return; 804 } 805 mnr = pfioc.nr; 806 for (pfioc.nr = 0; pfioc.nr < mnr; pfioc.nr++) { 807 if (ioctl(pffd, DIOCGETALTQ, &pfioc) != 0) { 808 if (errno == EBUSY) 809 break; 810 warn("altq support getting queue list"); 811 close(pffd); 812 return; 813 } 814 if (pfioc.altq.qid == 0) 815 continue; 816 altq = malloc(sizeof(*altq)); 817 if (altq == NULL) 818 err(EX_OSERR, "malloc"); 819 *altq = pfioc.altq; 820 TAILQ_INSERT_TAIL(&altq_entries, altq, entries); 821 } 822 close(pffd); 823} 824 825static u_int32_t 826altq_name_to_qid(const char *name) 827{ 828 struct pf_altq *altq; 829 830 altq_fetch(); 831 TAILQ_FOREACH(altq, &altq_entries, entries) 832 if (strcmp(name, altq->qname) == 0) 833 break; 834 if (altq == NULL) 835 errx(EX_DATAERR, "altq has no queue named `%s'", name); 836 return altq->qid; 837} 838 839static const char * 840altq_qid_to_name(u_int32_t qid) 841{ 842 struct pf_altq *altq; 843 844 altq_fetch(); 845 TAILQ_FOREACH(altq, &altq_entries, entries) 846 if (qid == altq->qid) 847 break; 848 if (altq == NULL) 849 return NULL; 850 return altq->qname; 851} 852 853static void 854fill_altq_qid(u_int32_t *qid, const char *av) 855{ 856 *qid = altq_name_to_qid(av); 857} 858 859/* 860 * Fill the body of the command with the list of port ranges. 861 */ 862static int 863fill_newports(ipfw_insn_u16 *cmd, char *av, int proto) 864{ 865 uint16_t a, b, *p = cmd->ports; 866 int i = 0; 867 char *s = av; 868 869 while (*s) { 870 a = strtoport(av, &s, 0, proto); 871 if (s == av) /* empty or invalid argument */ 872 return (0); 873 874 switch (*s) { 875 case '-': /* a range */ 876 av = s + 1; 877 b = strtoport(av, &s, 0, proto); 878 /* Reject expressions like '1-abc' or '1-2-3'. */ 879 if (s == av || (*s != ',' && *s != '\0')) 880 return (0); 881 p[0] = a; 882 p[1] = b; 883 break; 884 case ',': /* comma separated list */ 885 case '\0': 886 p[0] = p[1] = a; 887 break; 888 default: 889 warnx("port list: invalid separator <%c> in <%s>", 890 *s, av); 891 return (0); 892 } 893 894 i++; 895 p += 2; 896 av = s + 1; 897 } 898 if (i > 0) { 899 if (i + 1 > F_LEN_MASK) 900 errx(EX_DATAERR, "too many ports/ranges\n"); 901 cmd->o.len |= i + 1; /* leave F_NOT and F_OR untouched */ 902 } 903 return (i); 904} 905 906static struct _s_x icmpcodes[] = { 907 { "net", ICMP_UNREACH_NET }, 908 { "host", ICMP_UNREACH_HOST }, 909 { "protocol", ICMP_UNREACH_PROTOCOL }, 910 { "port", ICMP_UNREACH_PORT }, 911 { "needfrag", ICMP_UNREACH_NEEDFRAG }, 912 { "srcfail", ICMP_UNREACH_SRCFAIL }, 913 { "net-unknown", ICMP_UNREACH_NET_UNKNOWN }, 914 { "host-unknown", ICMP_UNREACH_HOST_UNKNOWN }, 915 { "isolated", ICMP_UNREACH_ISOLATED }, 916 { "net-prohib", ICMP_UNREACH_NET_PROHIB }, 917 { "host-prohib", ICMP_UNREACH_HOST_PROHIB }, 918 { "tosnet", ICMP_UNREACH_TOSNET }, 919 { "toshost", ICMP_UNREACH_TOSHOST }, 920 { "filter-prohib", ICMP_UNREACH_FILTER_PROHIB }, 921 { "host-precedence", ICMP_UNREACH_HOST_PRECEDENCE }, 922 { "precedence-cutoff", ICMP_UNREACH_PRECEDENCE_CUTOFF }, 923 { NULL, 0 } 924}; 925 926static void 927fill_reject_code(u_short *codep, char *str) 928{ 929 int val; 930 char *s; 931 932 val = strtoul(str, &s, 0); 933 if (s == str || *s != '\0' || val >= 0x100) 934 val = match_token(icmpcodes, str); 935 if (val < 0) 936 errx(EX_DATAERR, "unknown ICMP unreachable code ``%s''", str); 937 *codep = val; 938 return; 939} 940 941static void 942print_reject_code(uint16_t code) 943{ 944 char const *s = match_value(icmpcodes, code); 945 946 if (s != NULL) 947 printf("unreach %s", s); 948 else 949 printf("unreach %u", code); 950} 951 952static struct _s_x icmp6codes[] = { 953 { "no-route", ICMP6_DST_UNREACH_NOROUTE }, 954 { "admin-prohib", ICMP6_DST_UNREACH_ADMIN }, 955 { "address", ICMP6_DST_UNREACH_ADDR }, 956 { "port", ICMP6_DST_UNREACH_NOPORT }, 957 { NULL, 0 } 958}; 959 960static void 961fill_unreach6_code(u_short *codep, char *str) 962{ 963 int val; 964 char *s; 965 966 val = strtoul(str, &s, 0); 967 if (s == str || *s != '\0' || val >= 0x100) 968 val = match_token(icmp6codes, str); 969 if (val < 0) 970 errx(EX_DATAERR, "unknown ICMPv6 unreachable code ``%s''", str); 971 *codep = val; 972 return; 973} 974 975static void 976print_unreach6_code(uint16_t code) 977{ 978 char const *s = match_value(icmp6codes, code); 979 980 if (s != NULL) 981 printf("unreach6 %s", s); 982 else 983 printf("unreach6 %u", code); 984} 985 986/* 987 * Returns the number of bits set (from left) in a contiguous bitmask, 988 * or -1 if the mask is not contiguous. 989 * XXX this needs a proper fix. 990 * This effectively works on masks in big-endian (network) format. 991 * when compiled on little endian architectures. 992 * 993 * First bit is bit 7 of the first byte -- note, for MAC addresses, 994 * the first bit on the wire is bit 0 of the first byte. 995 * len is the max length in bits. 996 */ 997static int 998contigmask(uint8_t *p, int len) 999{ 1000 int i, n; 1001 1002 for (i=0; i<len ; i++) 1003 if ( (p[i/8] & (1 << (7 - (i%8)))) == 0) /* first bit unset */ 1004 break; 1005 for (n=i+1; n < len; n++) 1006 if ( (p[n/8] & (1 << (7 - (n%8)))) != 0) 1007 return -1; /* mask not contiguous */ 1008 return i; 1009} 1010 1011/* 1012 * print flags set/clear in the two bitmasks passed as parameters. 1013 * There is a specialized check for f_tcpflags. 1014 */ 1015static void 1016print_flags(char const *name, ipfw_insn *cmd, struct _s_x *list) 1017{ 1018 char const *comma = ""; 1019 int i; 1020 uint8_t set = cmd->arg1 & 0xff; 1021 uint8_t clear = (cmd->arg1 >> 8) & 0xff; 1022 1023 if (list == f_tcpflags && set == TH_SYN && clear == TH_ACK) { 1024 printf(" setup"); 1025 return; 1026 } 1027 1028 printf(" %s ", name); 1029 for (i=0; list[i].x != 0; i++) { 1030 if (set & list[i].x) { 1031 set &= ~list[i].x; 1032 printf("%s%s", comma, list[i].s); 1033 comma = ","; 1034 } 1035 if (clear & list[i].x) { 1036 clear &= ~list[i].x; 1037 printf("%s!%s", comma, list[i].s); 1038 comma = ","; 1039 } 1040 } 1041} 1042 1043/* 1044 * Print the ip address contained in a command. 1045 */ 1046static void 1047print_ip(ipfw_insn_ip *cmd, char const *s) 1048{ 1049 struct hostent *he = NULL; 1050 int len = F_LEN((ipfw_insn *)cmd); 1051 uint32_t *a = ((ipfw_insn_u32 *)cmd)->d; 1052 1053 printf("%s%s ", cmd->o.len & F_NOT ? " not": "", s); 1054 1055 if (cmd->o.opcode == O_IP_SRC_ME || cmd->o.opcode == O_IP_DST_ME) { 1056 printf("me"); 1057 return; 1058 } 1059 if (cmd->o.opcode == O_IP_SRC_LOOKUP || 1060 cmd->o.opcode == O_IP_DST_LOOKUP) { 1061 printf("table(%u", ((ipfw_insn *)cmd)->arg1); 1062 if (len == F_INSN_SIZE(ipfw_insn_u32)) 1063 printf(",%u", *a); 1064 printf(")"); 1065 return; 1066 } 1067 if (cmd->o.opcode == O_IP_SRC_SET || cmd->o.opcode == O_IP_DST_SET) { 1068 uint32_t x, *map = (uint32_t *)&(cmd->mask); 1069 int i, j; 1070 char comma = '{'; 1071 1072 x = cmd->o.arg1 - 1; 1073 x = htonl( ~x ); 1074 cmd->addr.s_addr = htonl(cmd->addr.s_addr); 1075 printf("%s/%d", inet_ntoa(cmd->addr), 1076 contigmask((uint8_t *)&x, 32)); 1077 x = cmd->addr.s_addr = htonl(cmd->addr.s_addr); 1078 x &= 0xff; /* base */ 1079 /* 1080 * Print bits and ranges. 1081 * Locate first bit set (i), then locate first bit unset (j). 1082 * If we have 3+ consecutive bits set, then print them as a 1083 * range, otherwise only print the initial bit and rescan. 1084 */ 1085 for (i=0; i < cmd->o.arg1; i++) 1086 if (map[i/32] & (1<<(i & 31))) { 1087 for (j=i+1; j < cmd->o.arg1; j++) 1088 if (!(map[ j/32] & (1<<(j & 31)))) 1089 break; 1090 printf("%c%d", comma, i+x); 1091 if (j>i+2) { /* range has at least 3 elements */ 1092 printf("-%d", j-1+x); 1093 i = j-1; 1094 } 1095 comma = ','; 1096 } 1097 printf("}"); 1098 return; 1099 } 1100 /* 1101 * len == 2 indicates a single IP, whereas lists of 1 or more 1102 * addr/mask pairs have len = (2n+1). We convert len to n so we 1103 * use that to count the number of entries. 1104 */ 1105 for (len = len / 2; len > 0; len--, a += 2) { 1106 int mb = /* mask length */ 1107 (cmd->o.opcode == O_IP_SRC || cmd->o.opcode == O_IP_DST) ? 1108 32 : contigmask((uint8_t *)&(a[1]), 32); 1109 if (mb == 32 && do_resolv) 1110 he = gethostbyaddr((char *)&(a[0]), sizeof(u_long), AF_INET); 1111 if (he != NULL) /* resolved to name */ 1112 printf("%s", he->h_name); 1113 else if (mb == 0) /* any */ 1114 printf("any"); 1115 else { /* numeric IP followed by some kind of mask */ 1116 printf("%s", inet_ntoa( *((struct in_addr *)&a[0]) ) ); 1117 if (mb < 0) 1118 printf(":%s", inet_ntoa( *((struct in_addr *)&a[1]) ) ); 1119 else if (mb < 32) 1120 printf("/%d", mb); 1121 } 1122 if (len > 1) 1123 printf(","); 1124 } 1125} 1126 1127/* 1128 * prints a MAC address/mask pair 1129 */ 1130static void 1131print_mac(uint8_t *addr, uint8_t *mask) 1132{ 1133 int l = contigmask(mask, 48); 1134 1135 if (l == 0) 1136 printf(" any"); 1137 else { 1138 printf(" %02x:%02x:%02x:%02x:%02x:%02x", 1139 addr[0], addr[1], addr[2], addr[3], addr[4], addr[5]); 1140 if (l == -1) 1141 printf("&%02x:%02x:%02x:%02x:%02x:%02x", 1142 mask[0], mask[1], mask[2], 1143 mask[3], mask[4], mask[5]); 1144 else if (l < 48) 1145 printf("/%d", l); 1146 } 1147} 1148 1149static void 1150fill_icmptypes(ipfw_insn_u32 *cmd, char *av) 1151{ 1152 uint8_t type; 1153 1154 cmd->d[0] = 0; 1155 while (*av) { 1156 if (*av == ',') 1157 av++; 1158 1159 type = strtoul(av, &av, 0); 1160 1161 if (*av != ',' && *av != '\0') 1162 errx(EX_DATAERR, "invalid ICMP type"); 1163 1164 if (type > 31) 1165 errx(EX_DATAERR, "ICMP type out of range"); 1166 1167 cmd->d[0] |= 1 << type; 1168 } 1169 cmd->o.opcode = O_ICMPTYPE; 1170 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32); 1171} 1172 1173static void 1174print_icmptypes(ipfw_insn_u32 *cmd) 1175{ 1176 int i; 1177 char sep= ' '; 1178 1179 printf(" icmptypes"); 1180 for (i = 0; i < 32; i++) { 1181 if ( (cmd->d[0] & (1 << (i))) == 0) 1182 continue; 1183 printf("%c%d", sep, i); 1184 sep = ','; 1185 } 1186} 1187 1188/* 1189 * Print the ip address contained in a command. 1190 */ 1191static void 1192print_ip6(ipfw_insn_ip6 *cmd, char const *s) 1193{ 1194 struct hostent *he = NULL; 1195 int len = F_LEN((ipfw_insn *) cmd) - 1; 1196 struct in6_addr *a = &(cmd->addr6); 1197 char trad[255]; 1198 1199 printf("%s%s ", cmd->o.len & F_NOT ? " not": "", s); 1200 1201 if (cmd->o.opcode == O_IP6_SRC_ME || cmd->o.opcode == O_IP6_DST_ME) { 1202 printf("me6"); 1203 return; 1204 } 1205 if (cmd->o.opcode == O_IP6) { 1206 printf(" ip6"); 1207 return; 1208 } 1209 1210 /* 1211 * len == 4 indicates a single IP, whereas lists of 1 or more 1212 * addr/mask pairs have len = (2n+1). We convert len to n so we 1213 * use that to count the number of entries. 1214 */ 1215 1216 for (len = len / 4; len > 0; len -= 2, a += 2) { 1217 int mb = /* mask length */ 1218 (cmd->o.opcode == O_IP6_SRC || cmd->o.opcode == O_IP6_DST) ? 1219 128 : contigmask((uint8_t *)&(a[1]), 128); 1220 1221 if (mb == 128 && do_resolv) 1222 he = gethostbyaddr((char *)a, sizeof(*a), AF_INET6); 1223 if (he != NULL) /* resolved to name */ 1224 printf("%s", he->h_name); 1225 else if (mb == 0) /* any */ 1226 printf("any"); 1227 else { /* numeric IP followed by some kind of mask */ 1228 if (inet_ntop(AF_INET6, a, trad, sizeof( trad ) ) == NULL) 1229 printf("Error ntop in print_ip6\n"); 1230 printf("%s", trad ); 1231 if (mb < 0) /* XXX not really legal... */ 1232 printf(":%s", 1233 inet_ntop(AF_INET6, &a[1], trad, sizeof(trad))); 1234 else if (mb < 128) 1235 printf("/%d", mb); 1236 } 1237 if (len > 2) 1238 printf(","); 1239 } 1240} 1241 1242static void 1243fill_icmp6types(ipfw_insn_icmp6 *cmd, char *av) 1244{ 1245 uint8_t type; 1246 1247 bzero(cmd, sizeof(*cmd)); 1248 while (*av) { 1249 if (*av == ',') 1250 av++; 1251 type = strtoul(av, &av, 0); 1252 if (*av != ',' && *av != '\0') 1253 errx(EX_DATAERR, "invalid ICMP6 type"); 1254 /* 1255 * XXX: shouldn't this be 0xFF? I can't see any reason why 1256 * we shouldn't be able to filter all possiable values 1257 * regardless of the ability of the rest of the kernel to do 1258 * anything useful with them. 1259 */ 1260 if (type > ICMP6_MAXTYPE) 1261 errx(EX_DATAERR, "ICMP6 type out of range"); 1262 cmd->d[type / 32] |= ( 1 << (type % 32)); 1263 } 1264 cmd->o.opcode = O_ICMP6TYPE; 1265 cmd->o.len |= F_INSN_SIZE(ipfw_insn_icmp6); 1266} 1267 1268 1269static void 1270print_icmp6types(ipfw_insn_u32 *cmd) 1271{ 1272 int i, j; 1273 char sep= ' '; 1274 1275 printf(" ip6 icmp6types"); 1276 for (i = 0; i < 7; i++) 1277 for (j=0; j < 32; ++j) { 1278 if ( (cmd->d[i] & (1 << (j))) == 0) 1279 continue; 1280 printf("%c%d", sep, (i*32 + j)); 1281 sep = ','; 1282 } 1283} 1284 1285static void 1286print_flow6id( ipfw_insn_u32 *cmd) 1287{ 1288 uint16_t i, limit = cmd->o.arg1; 1289 char sep = ','; 1290 1291 printf(" flow-id "); 1292 for( i=0; i < limit; ++i) { 1293 if (i == limit - 1) 1294 sep = ' '; 1295 printf("%d%c", cmd->d[i], sep); 1296 } 1297} 1298 1299/* structure and define for the extension header in ipv6 */ 1300static struct _s_x ext6hdrcodes[] = { 1301 { "frag", EXT_FRAGMENT }, 1302 { "hopopt", EXT_HOPOPTS }, 1303 { "route", EXT_ROUTING }, 1304 { "dstopt", EXT_DSTOPTS }, 1305 { "ah", EXT_AH }, 1306 { "esp", EXT_ESP }, 1307 { "rthdr0", EXT_RTHDR0 }, 1308 { "rthdr2", EXT_RTHDR2 }, 1309 { NULL, 0 } 1310}; 1311 1312/* fills command for the extension header filtering */ 1313static int 1314fill_ext6hdr( ipfw_insn *cmd, char *av) 1315{ 1316 int tok; 1317 char *s = av; 1318 1319 cmd->arg1 = 0; 1320 1321 while(s) { 1322 av = strsep( &s, ",") ; 1323 tok = match_token(ext6hdrcodes, av); 1324 switch (tok) { 1325 case EXT_FRAGMENT: 1326 cmd->arg1 |= EXT_FRAGMENT; 1327 break; 1328 1329 case EXT_HOPOPTS: 1330 cmd->arg1 |= EXT_HOPOPTS; 1331 break; 1332 1333 case EXT_ROUTING: 1334 cmd->arg1 |= EXT_ROUTING; 1335 break; 1336 1337 case EXT_DSTOPTS: 1338 cmd->arg1 |= EXT_DSTOPTS; 1339 break; 1340 1341 case EXT_AH: 1342 cmd->arg1 |= EXT_AH; 1343 break; 1344 1345 case EXT_ESP: 1346 cmd->arg1 |= EXT_ESP; 1347 break; 1348 1349 case EXT_RTHDR0: 1350 cmd->arg1 |= EXT_RTHDR0; 1351 break; 1352 1353 case EXT_RTHDR2: 1354 cmd->arg1 |= EXT_RTHDR2; 1355 break; 1356 1357 default: 1358 errx( EX_DATAERR, "invalid option for ipv6 exten header" ); 1359 break; 1360 } 1361 } 1362 if (cmd->arg1 == 0 ) 1363 return 0; 1364 cmd->opcode = O_EXT_HDR; 1365 cmd->len |= F_INSN_SIZE( ipfw_insn ); 1366 return 1; 1367} 1368 1369static void 1370print_ext6hdr( ipfw_insn *cmd ) 1371{ 1372 char sep = ' '; 1373 1374 printf(" extension header:"); 1375 if (cmd->arg1 & EXT_FRAGMENT ) { 1376 printf("%cfragmentation", sep); 1377 sep = ','; 1378 } 1379 if (cmd->arg1 & EXT_HOPOPTS ) { 1380 printf("%chop options", sep); 1381 sep = ','; 1382 } 1383 if (cmd->arg1 & EXT_ROUTING ) { 1384 printf("%crouting options", sep); 1385 sep = ','; 1386 } 1387 if (cmd->arg1 & EXT_RTHDR0 ) { 1388 printf("%crthdr0", sep); 1389 sep = ','; 1390 } 1391 if (cmd->arg1 & EXT_RTHDR2 ) { 1392 printf("%crthdr2", sep); 1393 sep = ','; 1394 } 1395 if (cmd->arg1 & EXT_DSTOPTS ) { 1396 printf("%cdestination options", sep); 1397 sep = ','; 1398 } 1399 if (cmd->arg1 & EXT_AH ) { 1400 printf("%cauthentication header", sep); 1401 sep = ','; 1402 } 1403 if (cmd->arg1 & EXT_ESP ) { 1404 printf("%cencapsulated security payload", sep); 1405 } 1406} 1407 1408/* 1409 * show_ipfw() prints the body of an ipfw rule. 1410 * Because the standard rule has at least proto src_ip dst_ip, we use 1411 * a helper function to produce these entries if not provided explicitly. 1412 * The first argument is the list of fields we have, the second is 1413 * the list of fields we want to be printed. 1414 * 1415 * Special cases if we have provided a MAC header: 1416 * + if the rule does not contain IP addresses/ports, do not print them; 1417 * + if the rule does not contain an IP proto, print "all" instead of "ip"; 1418 * 1419 * Once we have 'have_options', IP header fields are printed as options. 1420 */ 1421#define HAVE_PROTO 0x0001 1422#define HAVE_SRCIP 0x0002 1423#define HAVE_DSTIP 0x0004 1424#define HAVE_PROTO4 0x0008 1425#define HAVE_PROTO6 0x0010 1426#define HAVE_OPTIONS 0x8000 1427 1428#define HAVE_IP (HAVE_PROTO | HAVE_SRCIP | HAVE_DSTIP) 1429static void 1430show_prerequisites(int *flags, int want, int cmd __unused) 1431{ 1432 if (comment_only) 1433 return; 1434 if ( (*flags & HAVE_IP) == HAVE_IP) 1435 *flags |= HAVE_OPTIONS; 1436 1437 if ( !(*flags & HAVE_OPTIONS)) { 1438 if ( !(*flags & HAVE_PROTO) && (want & HAVE_PROTO)) { 1439 if ( (*flags & HAVE_PROTO4)) 1440 printf(" ip4"); 1441 else if ( (*flags & HAVE_PROTO6)) 1442 printf(" ip6"); 1443 else 1444 printf(" ip"); 1445 } 1446 if ( !(*flags & HAVE_SRCIP) && (want & HAVE_SRCIP)) 1447 printf(" from any"); 1448 if ( !(*flags & HAVE_DSTIP) && (want & HAVE_DSTIP)) 1449 printf(" to any"); 1450 } 1451 *flags |= want; 1452} 1453 1454static void 1455show_ipfw(struct ip_fw *rule, int pcwidth, int bcwidth) 1456{ 1457 static int twidth = 0; 1458 int l; 1459 ipfw_insn *cmd, *tagptr = NULL; 1460 const char *comment = NULL; /* ptr to comment if we have one */ 1461 int proto = 0; /* default */ 1462 int flags = 0; /* prerequisites */ 1463 ipfw_insn_log *logptr = NULL; /* set if we find an O_LOG */ 1464 ipfw_insn_altq *altqptr = NULL; /* set if we find an O_ALTQ */ 1465 int or_block = 0; /* we are in an or block */ 1466 uint32_t set_disable; 1467 1468 bcopy(&rule->next_rule, &set_disable, sizeof(set_disable)); 1469 1470 if (set_disable & (1 << rule->set)) { /* disabled */ 1471 if (!show_sets) 1472 return; 1473 else 1474 printf("# DISABLED "); 1475 } 1476 printf("%05u ", rule->rulenum); 1477 1478 if (pcwidth>0 || bcwidth>0) 1479 printf("%*llu %*llu ", pcwidth, align_uint64(&rule->pcnt), 1480 bcwidth, align_uint64(&rule->bcnt)); 1481 1482 if (do_time == 2) 1483 printf("%10u ", rule->timestamp); 1484 else if (do_time == 1) { 1485 char timestr[30]; 1486 time_t t = (time_t)0; 1487 1488 if (twidth == 0) { 1489 strcpy(timestr, ctime(&t)); 1490 *strchr(timestr, '\n') = '\0'; 1491 twidth = strlen(timestr); 1492 } 1493 if (rule->timestamp) { 1494 t = _long_to_time(rule->timestamp); 1495 1496 strcpy(timestr, ctime(&t)); 1497 *strchr(timestr, '\n') = '\0'; 1498 printf("%s ", timestr); 1499 } else { 1500 printf("%*s", twidth, " "); 1501 } 1502 } 1503 1504 if (show_sets) 1505 printf("set %d ", rule->set); 1506 1507 /* 1508 * print the optional "match probability" 1509 */ 1510 if (rule->cmd_len > 0) { 1511 cmd = rule->cmd ; 1512 if (cmd->opcode == O_PROB) { 1513 ipfw_insn_u32 *p = (ipfw_insn_u32 *)cmd; 1514 double d = 1.0 * p->d[0]; 1515 1516 d = (d / 0x7fffffff); 1517 printf("prob %f ", d); 1518 } 1519 } 1520 1521 /* 1522 * first print actions 1523 */ 1524 for (l = rule->cmd_len - rule->act_ofs, cmd = ACTION_PTR(rule); 1525 l > 0 ; l -= F_LEN(cmd), cmd += F_LEN(cmd)) { 1526 switch(cmd->opcode) { 1527 case O_CHECK_STATE: 1528 printf("check-state"); 1529 flags = HAVE_IP; /* avoid printing anything else */ 1530 break; 1531 1532 case O_ACCEPT: 1533 printf("allow"); 1534 break; 1535 1536 case O_COUNT: 1537 printf("count"); 1538 break; 1539 1540 case O_DENY: 1541 printf("deny"); 1542 break; 1543 1544 case O_REJECT: 1545 if (cmd->arg1 == ICMP_REJECT_RST) 1546 printf("reset"); 1547 else if (cmd->arg1 == ICMP_UNREACH_HOST) 1548 printf("reject"); 1549 else 1550 print_reject_code(cmd->arg1); 1551 break; 1552 1553 case O_UNREACH6: 1554 if (cmd->arg1 == ICMP6_UNREACH_RST) 1555 printf("reset6"); 1556 else 1557 print_unreach6_code(cmd->arg1); 1558 break; 1559 1560 case O_SKIPTO: 1561 PRINT_UINT_ARG("skipto ", cmd->arg1); 1562 break; 1563 1564 case O_PIPE: 1565 PRINT_UINT_ARG("pipe ", cmd->arg1); 1566 break; 1567 1568 case O_QUEUE: 1569 PRINT_UINT_ARG("queue ", cmd->arg1); 1570 break; 1571 1572 case O_DIVERT: 1573 PRINT_UINT_ARG("divert ", cmd->arg1); 1574 break; 1575 1576 case O_TEE: 1577 PRINT_UINT_ARG("tee ", cmd->arg1); 1578 break; 1579 1580 case O_NETGRAPH: 1581 PRINT_UINT_ARG("netgraph ", cmd->arg1); 1582 break; 1583 1584 case O_NGTEE: 1585 PRINT_UINT_ARG("ngtee ", cmd->arg1); 1586 break; 1587 1588 case O_FORWARD_IP: 1589 { 1590 ipfw_insn_sa *s = (ipfw_insn_sa *)cmd; 1591 1592 if (s->sa.sin_addr.s_addr == INADDR_ANY) { 1593 printf("fwd tablearg"); 1594 } else { 1595 printf("fwd %s", inet_ntoa(s->sa.sin_addr)); 1596 } 1597 if (s->sa.sin_port) 1598 printf(",%d", s->sa.sin_port); 1599 } 1600 break; 1601 1602 case O_LOG: /* O_LOG is printed last */ 1603 logptr = (ipfw_insn_log *)cmd; 1604 break; 1605 1606 case O_ALTQ: /* O_ALTQ is printed after O_LOG */ 1607 altqptr = (ipfw_insn_altq *)cmd; 1608 break; 1609 1610 case O_TAG: 1611 tagptr = cmd; 1612 break; 1613 1614 case O_NAT: 1615 PRINT_UINT_ARG("nat ", cmd->arg1); 1616 break; 1617 1618 case O_SETFIB: 1619 PRINT_UINT_ARG("setfib ", cmd->arg1); 1620 break; 1621 1622 default: 1623 printf("** unrecognized action %d len %d ", 1624 cmd->opcode, cmd->len); 1625 } 1626 } 1627 if (logptr) { 1628 if (logptr->max_log > 0) 1629 printf(" log logamount %d", logptr->max_log); 1630 else 1631 printf(" log"); 1632 } 1633 if (altqptr) { 1634 const char *qname; 1635 1636 qname = altq_qid_to_name(altqptr->qid); 1637 if (qname == NULL) 1638 printf(" altq ?<%u>", altqptr->qid); 1639 else 1640 printf(" altq %s", qname); 1641 } 1642 if (tagptr) { 1643 if (tagptr->len & F_NOT) 1644 PRINT_UINT_ARG(" untag ", tagptr->arg1); 1645 else 1646 PRINT_UINT_ARG(" tag ", tagptr->arg1); 1647 } 1648 1649 /* 1650 * then print the body. 1651 */ 1652 for (l = rule->act_ofs, cmd = rule->cmd ; 1653 l > 0 ; l -= F_LEN(cmd) , cmd += F_LEN(cmd)) { 1654 if ((cmd->len & F_OR) || (cmd->len & F_NOT)) 1655 continue; 1656 if (cmd->opcode == O_IP4) { 1657 flags |= HAVE_PROTO4; 1658 break; 1659 } else if (cmd->opcode == O_IP6) { 1660 flags |= HAVE_PROTO6; 1661 break; 1662 } 1663 } 1664 if (rule->_pad & 1) { /* empty rules before options */ 1665 if (!do_compact) { 1666 show_prerequisites(&flags, HAVE_PROTO, 0); 1667 printf(" from any to any"); 1668 } 1669 flags |= HAVE_IP | HAVE_OPTIONS; 1670 } 1671 1672 if (comment_only) 1673 comment = "..."; 1674 1675 for (l = rule->act_ofs, cmd = rule->cmd ; 1676 l > 0 ; l -= F_LEN(cmd) , cmd += F_LEN(cmd)) { 1677 /* useful alias */ 1678 ipfw_insn_u32 *cmd32 = (ipfw_insn_u32 *)cmd; 1679 1680 if (comment_only) { 1681 if (cmd->opcode != O_NOP) 1682 continue; 1683 printf(" // %s\n", (char *)(cmd + 1)); 1684 return; 1685 } 1686 1687 show_prerequisites(&flags, 0, cmd->opcode); 1688 1689 switch(cmd->opcode) { 1690 case O_PROB: 1691 break; /* done already */ 1692 1693 case O_PROBE_STATE: 1694 break; /* no need to print anything here */ 1695 1696 case O_IP_SRC: 1697 case O_IP_SRC_LOOKUP: 1698 case O_IP_SRC_MASK: 1699 case O_IP_SRC_ME: 1700 case O_IP_SRC_SET: 1701 show_prerequisites(&flags, HAVE_PROTO, 0); 1702 if (!(flags & HAVE_SRCIP)) 1703 printf(" from"); 1704 if ((cmd->len & F_OR) && !or_block) 1705 printf(" {"); 1706 print_ip((ipfw_insn_ip *)cmd, 1707 (flags & HAVE_OPTIONS) ? " src-ip" : ""); 1708 flags |= HAVE_SRCIP; 1709 break; 1710 1711 case O_IP_DST: 1712 case O_IP_DST_LOOKUP: 1713 case O_IP_DST_MASK: 1714 case O_IP_DST_ME: 1715 case O_IP_DST_SET: 1716 show_prerequisites(&flags, HAVE_PROTO|HAVE_SRCIP, 0); 1717 if (!(flags & HAVE_DSTIP)) 1718 printf(" to"); 1719 if ((cmd->len & F_OR) && !or_block) 1720 printf(" {"); 1721 print_ip((ipfw_insn_ip *)cmd, 1722 (flags & HAVE_OPTIONS) ? " dst-ip" : ""); 1723 flags |= HAVE_DSTIP; 1724 break; 1725 1726 case O_IP6_SRC: 1727 case O_IP6_SRC_MASK: 1728 case O_IP6_SRC_ME: 1729 show_prerequisites(&flags, HAVE_PROTO, 0); 1730 if (!(flags & HAVE_SRCIP)) 1731 printf(" from"); 1732 if ((cmd->len & F_OR) && !or_block) 1733 printf(" {"); 1734 print_ip6((ipfw_insn_ip6 *)cmd, 1735 (flags & HAVE_OPTIONS) ? " src-ip6" : ""); 1736 flags |= HAVE_SRCIP | HAVE_PROTO; 1737 break; 1738 1739 case O_IP6_DST: 1740 case O_IP6_DST_MASK: 1741 case O_IP6_DST_ME: 1742 show_prerequisites(&flags, HAVE_PROTO|HAVE_SRCIP, 0); 1743 if (!(flags & HAVE_DSTIP)) 1744 printf(" to"); 1745 if ((cmd->len & F_OR) && !or_block) 1746 printf(" {"); 1747 print_ip6((ipfw_insn_ip6 *)cmd, 1748 (flags & HAVE_OPTIONS) ? " dst-ip6" : ""); 1749 flags |= HAVE_DSTIP; 1750 break; 1751 1752 case O_FLOW6ID: 1753 print_flow6id( (ipfw_insn_u32 *) cmd ); 1754 flags |= HAVE_OPTIONS; 1755 break; 1756 1757 case O_IP_DSTPORT: 1758 show_prerequisites(&flags, HAVE_IP, 0); 1759 case O_IP_SRCPORT: 1760 show_prerequisites(&flags, HAVE_PROTO|HAVE_SRCIP, 0); 1761 if ((cmd->len & F_OR) && !or_block) 1762 printf(" {"); 1763 if (cmd->len & F_NOT) 1764 printf(" not"); 1765 print_newports((ipfw_insn_u16 *)cmd, proto, 1766 (flags & HAVE_OPTIONS) ? cmd->opcode : 0); 1767 break; 1768 1769 case O_PROTO: { 1770 struct protoent *pe = NULL; 1771 1772 if ((cmd->len & F_OR) && !or_block) 1773 printf(" {"); 1774 if (cmd->len & F_NOT) 1775 printf(" not"); 1776 proto = cmd->arg1; 1777 pe = getprotobynumber(cmd->arg1); 1778 if ((flags & (HAVE_PROTO4 | HAVE_PROTO6)) && 1779 !(flags & HAVE_PROTO)) 1780 show_prerequisites(&flags, 1781 HAVE_IP | HAVE_OPTIONS, 0); 1782 if (flags & HAVE_OPTIONS) 1783 printf(" proto"); 1784 if (pe) 1785 printf(" %s", pe->p_name); 1786 else 1787 printf(" %u", cmd->arg1); 1788 } 1789 flags |= HAVE_PROTO; 1790 break; 1791 1792 default: /*options ... */ 1793 if (!(cmd->len & (F_OR|F_NOT))) 1794 if (((cmd->opcode == O_IP6) && 1795 (flags & HAVE_PROTO6)) || 1796 ((cmd->opcode == O_IP4) && 1797 (flags & HAVE_PROTO4))) 1798 break; 1799 show_prerequisites(&flags, HAVE_IP | HAVE_OPTIONS, 0); 1800 if ((cmd->len & F_OR) && !or_block) 1801 printf(" {"); 1802 if (cmd->len & F_NOT && cmd->opcode != O_IN) 1803 printf(" not"); 1804 switch(cmd->opcode) { 1805 case O_MACADDR2: { 1806 ipfw_insn_mac *m = (ipfw_insn_mac *)cmd; 1807 1808 printf(" MAC"); 1809 print_mac(m->addr, m->mask); 1810 print_mac(m->addr + 6, m->mask + 6); 1811 } 1812 break; 1813 1814 case O_MAC_TYPE: 1815 print_newports((ipfw_insn_u16 *)cmd, 1816 IPPROTO_ETHERTYPE, cmd->opcode); 1817 break; 1818 1819 1820 case O_FRAG: 1821 printf(" frag"); 1822 break; 1823 1824 case O_FIB: 1825 printf(" fib %u", cmd->arg1 ); 1826 break; 1827 1828 case O_IN: 1829 printf(cmd->len & F_NOT ? " out" : " in"); 1830 break; 1831 1832 case O_DIVERTED: 1833 switch (cmd->arg1) { 1834 case 3: 1835 printf(" diverted"); 1836 break; 1837 case 1: 1838 printf(" diverted-loopback"); 1839 break; 1840 case 2: 1841 printf(" diverted-output"); 1842 break; 1843 default: 1844 printf(" diverted-?<%u>", cmd->arg1); 1845 break; 1846 } 1847 break; 1848 1849 case O_LAYER2: 1850 printf(" layer2"); 1851 break; 1852 case O_XMIT: 1853 case O_RECV: 1854 case O_VIA: 1855 { 1856 char const *s; 1857 ipfw_insn_if *cmdif = (ipfw_insn_if *)cmd; 1858 1859 if (cmd->opcode == O_XMIT) 1860 s = "xmit"; 1861 else if (cmd->opcode == O_RECV) 1862 s = "recv"; 1863 else /* if (cmd->opcode == O_VIA) */ 1864 s = "via"; 1865 if (cmdif->name[0] == '\0') 1866 printf(" %s %s", s, 1867 inet_ntoa(cmdif->p.ip)); 1868 else 1869 printf(" %s %s", s, cmdif->name); 1870 1871 break; 1872 } 1873 case O_IPID: 1874 if (F_LEN(cmd) == 1) 1875 printf(" ipid %u", cmd->arg1 ); 1876 else 1877 print_newports((ipfw_insn_u16 *)cmd, 0, 1878 O_IPID); 1879 break; 1880 1881 case O_IPTTL: 1882 if (F_LEN(cmd) == 1) 1883 printf(" ipttl %u", cmd->arg1 ); 1884 else 1885 print_newports((ipfw_insn_u16 *)cmd, 0, 1886 O_IPTTL); 1887 break; 1888 1889 case O_IPVER: 1890 printf(" ipver %u", cmd->arg1 ); 1891 break; 1892 1893 case O_IPPRECEDENCE: 1894 printf(" ipprecedence %u", (cmd->arg1) >> 5 ); 1895 break; 1896 1897 case O_IPLEN: 1898 if (F_LEN(cmd) == 1) 1899 printf(" iplen %u", cmd->arg1 ); 1900 else 1901 print_newports((ipfw_insn_u16 *)cmd, 0, 1902 O_IPLEN); 1903 break; 1904 1905 case O_IPOPT: 1906 print_flags("ipoptions", cmd, f_ipopts); 1907 break; 1908 1909 case O_IPTOS: 1910 print_flags("iptos", cmd, f_iptos); 1911 break; 1912 1913 case O_ICMPTYPE: 1914 print_icmptypes((ipfw_insn_u32 *)cmd); 1915 break; 1916 1917 case O_ESTAB: 1918 printf(" established"); 1919 break; 1920 1921 case O_TCPDATALEN: 1922 if (F_LEN(cmd) == 1) 1923 printf(" tcpdatalen %u", cmd->arg1 ); 1924 else 1925 print_newports((ipfw_insn_u16 *)cmd, 0, 1926 O_TCPDATALEN); 1927 break; 1928 1929 case O_TCPFLAGS: 1930 print_flags("tcpflags", cmd, f_tcpflags); 1931 break; 1932 1933 case O_TCPOPTS: 1934 print_flags("tcpoptions", cmd, f_tcpopts); 1935 break; 1936 1937 case O_TCPWIN: 1938 printf(" tcpwin %d", ntohs(cmd->arg1)); 1939 break; 1940 1941 case O_TCPACK: 1942 printf(" tcpack %d", ntohl(cmd32->d[0])); 1943 break; 1944 1945 case O_TCPSEQ: 1946 printf(" tcpseq %d", ntohl(cmd32->d[0])); 1947 break; 1948 1949 case O_UID: 1950 { 1951 struct passwd *pwd = getpwuid(cmd32->d[0]); 1952 1953 if (pwd) 1954 printf(" uid %s", pwd->pw_name); 1955 else 1956 printf(" uid %u", cmd32->d[0]); 1957 } 1958 break; 1959 1960 case O_GID: 1961 { 1962 struct group *grp = getgrgid(cmd32->d[0]); 1963 1964 if (grp) 1965 printf(" gid %s", grp->gr_name); 1966 else 1967 printf(" gid %u", cmd32->d[0]); 1968 } 1969 break; 1970 1971 case O_JAIL: 1972 printf(" jail %d", cmd32->d[0]); 1973 break; 1974 1975 case O_VERREVPATH: 1976 printf(" verrevpath"); 1977 break; 1978 1979 case O_VERSRCREACH: 1980 printf(" versrcreach"); 1981 break; 1982 1983 case O_ANTISPOOF: 1984 printf(" antispoof"); 1985 break; 1986 1987 case O_IPSEC: 1988 printf(" ipsec"); 1989 break; 1990 1991 case O_NOP: 1992 comment = (char *)(cmd + 1); 1993 break; 1994 1995 case O_KEEP_STATE: 1996 printf(" keep-state"); 1997 break; 1998 1999 case O_LIMIT: { 2000 struct _s_x *p = limit_masks; 2001 ipfw_insn_limit *c = (ipfw_insn_limit *)cmd; 2002 uint8_t x = c->limit_mask; 2003 char const *comma = " "; 2004 2005 printf(" limit"); 2006 for (; p->x != 0 ; p++) 2007 if ((x & p->x) == p->x) { 2008 x &= ~p->x; 2009 printf("%s%s", comma, p->s); 2010 comma = ","; 2011 } 2012 PRINT_UINT_ARG(" ", c->conn_limit); 2013 break; 2014 } 2015 2016 case O_IP6: 2017 printf(" ip6"); 2018 break; 2019 2020 case O_IP4: 2021 printf(" ip4"); 2022 break; 2023 2024 case O_ICMP6TYPE: 2025 print_icmp6types((ipfw_insn_u32 *)cmd); 2026 break; 2027 2028 case O_EXT_HDR: 2029 print_ext6hdr( (ipfw_insn *) cmd ); 2030 break; 2031 2032 case O_TAGGED: 2033 if (F_LEN(cmd) == 1) 2034 PRINT_UINT_ARG(" tagged ", cmd->arg1); 2035 else 2036 print_newports((ipfw_insn_u16 *)cmd, 0, 2037 O_TAGGED); 2038 break; 2039 2040 default: 2041 printf(" [opcode %d len %d]", 2042 cmd->opcode, cmd->len); 2043 } 2044 } 2045 if (cmd->len & F_OR) { 2046 printf(" or"); 2047 or_block = 1; 2048 } else if (or_block) { 2049 printf(" }"); 2050 or_block = 0; 2051 } 2052 } 2053 show_prerequisites(&flags, HAVE_IP, 0); 2054 if (comment) 2055 printf(" // %s", comment); 2056 printf("\n"); 2057} 2058 2059static void 2060show_dyn_ipfw(ipfw_dyn_rule *d, int pcwidth, int bcwidth) 2061{ 2062 struct protoent *pe; 2063 struct in_addr a; 2064 uint16_t rulenum; 2065 char buf[INET6_ADDRSTRLEN]; 2066 2067 if (!do_expired) { 2068 if (!d->expire && !(d->dyn_type == O_LIMIT_PARENT)) 2069 return; 2070 } 2071 bcopy(&d->rule, &rulenum, sizeof(rulenum)); 2072 printf("%05d", rulenum); 2073 if (pcwidth>0 || bcwidth>0) 2074 printf(" %*llu %*llu (%ds)", pcwidth, 2075 align_uint64(&d->pcnt), bcwidth, 2076 align_uint64(&d->bcnt), d->expire); 2077 switch (d->dyn_type) { 2078 case O_LIMIT_PARENT: 2079 printf(" PARENT %d", d->count); 2080 break; 2081 case O_LIMIT: 2082 printf(" LIMIT"); 2083 break; 2084 case O_KEEP_STATE: /* bidir, no mask */ 2085 printf(" STATE"); 2086 break; 2087 } 2088 2089 if ((pe = getprotobynumber(d->id.proto)) != NULL) 2090 printf(" %s", pe->p_name); 2091 else 2092 printf(" proto %u", d->id.proto); 2093 2094 if (d->id.addr_type == 4) { 2095 a.s_addr = htonl(d->id.src_ip); 2096 printf(" %s %d", inet_ntoa(a), d->id.src_port); 2097 2098 a.s_addr = htonl(d->id.dst_ip); 2099 printf(" <-> %s %d", inet_ntoa(a), d->id.dst_port); 2100 } else if (d->id.addr_type == 6) { 2101 printf(" %s %d", inet_ntop(AF_INET6, &d->id.src_ip6, buf, 2102 sizeof(buf)), d->id.src_port); 2103 printf(" <-> %s %d", inet_ntop(AF_INET6, &d->id.dst_ip6, buf, 2104 sizeof(buf)), d->id.dst_port); 2105 } else 2106 printf(" UNKNOWN <-> UNKNOWN\n"); 2107 2108 printf("\n"); 2109} 2110 2111static int 2112sort_q(const void *pa, const void *pb) 2113{ 2114 int rev = (do_sort < 0); 2115 int field = rev ? -do_sort : do_sort; 2116 long long res = 0; 2117 const struct dn_flow_queue *a = pa; 2118 const struct dn_flow_queue *b = pb; 2119 2120 switch (field) { 2121 case 1: /* pkts */ 2122 res = a->len - b->len; 2123 break; 2124 case 2: /* bytes */ 2125 res = a->len_bytes - b->len_bytes; 2126 break; 2127 2128 case 3: /* tot pkts */ 2129 res = a->tot_pkts - b->tot_pkts; 2130 break; 2131 2132 case 4: /* tot bytes */ 2133 res = a->tot_bytes - b->tot_bytes; 2134 break; 2135 } 2136 if (res < 0) 2137 res = -1; 2138 if (res > 0) 2139 res = 1; 2140 return (int)(rev ? res : -res); 2141} 2142 2143static void 2144list_queues(struct dn_flow_set *fs, struct dn_flow_queue *q) 2145{ 2146 int l; 2147 int index_printed, indexes = 0; 2148 char buff[255]; 2149 struct protoent *pe; 2150 2151 if (fs->rq_elements == 0) 2152 return; 2153 2154 if (do_sort != 0) 2155 heapsort(q, fs->rq_elements, sizeof *q, sort_q); 2156 2157 /* Print IPv4 flows */ 2158 index_printed = 0; 2159 for (l = 0; l < fs->rq_elements; l++) { 2160 struct in_addr ina; 2161 2162 /* XXX: Should check for IPv4 flows */ 2163 if (IS_IP6_FLOW_ID(&(q[l].id))) 2164 continue; 2165 2166 if (!index_printed) { 2167 index_printed = 1; 2168 if (indexes > 0) /* currently a no-op */ 2169 printf("\n"); 2170 indexes++; 2171 printf(" " 2172 "mask: 0x%02x 0x%08x/0x%04x -> 0x%08x/0x%04x\n", 2173 fs->flow_mask.proto, 2174 fs->flow_mask.src_ip, fs->flow_mask.src_port, 2175 fs->flow_mask.dst_ip, fs->flow_mask.dst_port); 2176 2177 printf("BKT Prot ___Source IP/port____ " 2178 "____Dest. IP/port____ " 2179 "Tot_pkt/bytes Pkt/Byte Drp\n"); 2180 } 2181 2182 printf("%3d ", q[l].hash_slot); 2183 pe = getprotobynumber(q[l].id.proto); 2184 if (pe) 2185 printf("%-4s ", pe->p_name); 2186 else 2187 printf("%4u ", q[l].id.proto); 2188 ina.s_addr = htonl(q[l].id.src_ip); 2189 printf("%15s/%-5d ", 2190 inet_ntoa(ina), q[l].id.src_port); 2191 ina.s_addr = htonl(q[l].id.dst_ip); 2192 printf("%15s/%-5d ", 2193 inet_ntoa(ina), q[l].id.dst_port); 2194 printf("%4qu %8qu %2u %4u %3u\n", 2195 q[l].tot_pkts, q[l].tot_bytes, 2196 q[l].len, q[l].len_bytes, q[l].drops); 2197 if (verbose) 2198 printf(" S %20qd F %20qd\n", 2199 q[l].S, q[l].F); 2200 } 2201 2202 /* Print IPv6 flows */ 2203 index_printed = 0; 2204 for (l = 0; l < fs->rq_elements; l++) { 2205 if (!IS_IP6_FLOW_ID(&(q[l].id))) 2206 continue; 2207 2208 if (!index_printed) { 2209 index_printed = 1; 2210 if (indexes > 0) 2211 printf("\n"); 2212 indexes++; 2213 printf("\n mask: proto: 0x%02x, flow_id: 0x%08x, ", 2214 fs->flow_mask.proto, fs->flow_mask.flow_id6); 2215 inet_ntop(AF_INET6, &(fs->flow_mask.src_ip6), 2216 buff, sizeof(buff)); 2217 printf("%s/0x%04x -> ", buff, fs->flow_mask.src_port); 2218 inet_ntop( AF_INET6, &(fs->flow_mask.dst_ip6), 2219 buff, sizeof(buff) ); 2220 printf("%s/0x%04x\n", buff, fs->flow_mask.dst_port); 2221 2222 printf("BKT ___Prot___ _flow-id_ " 2223 "______________Source IPv6/port_______________ " 2224 "_______________Dest. IPv6/port_______________ " 2225 "Tot_pkt/bytes Pkt/Byte Drp\n"); 2226 } 2227 printf("%3d ", q[l].hash_slot); 2228 pe = getprotobynumber(q[l].id.proto); 2229 if (pe != NULL) 2230 printf("%9s ", pe->p_name); 2231 else 2232 printf("%9u ", q[l].id.proto); 2233 printf("%7d %39s/%-5d ", q[l].id.flow_id6, 2234 inet_ntop(AF_INET6, &(q[l].id.src_ip6), buff, sizeof(buff)), 2235 q[l].id.src_port); 2236 printf(" %39s/%-5d ", 2237 inet_ntop(AF_INET6, &(q[l].id.dst_ip6), buff, sizeof(buff)), 2238 q[l].id.dst_port); 2239 printf(" %4qu %8qu %2u %4u %3u\n", 2240 q[l].tot_pkts, q[l].tot_bytes, 2241 q[l].len, q[l].len_bytes, q[l].drops); 2242 if (verbose) 2243 printf(" S %20qd F %20qd\n", q[l].S, q[l].F); 2244 } 2245} 2246 2247static void 2248print_flowset_parms(struct dn_flow_set *fs, char *prefix) 2249{ 2250 int l; 2251 char qs[30]; 2252 char plr[30]; 2253 char red[90]; /* Display RED parameters */ 2254 2255 l = fs->qsize; 2256 if (fs->flags_fs & DN_QSIZE_IS_BYTES) { 2257 if (l >= 8192) 2258 sprintf(qs, "%d KB", l / 1024); 2259 else 2260 sprintf(qs, "%d B", l); 2261 } else 2262 sprintf(qs, "%3d sl.", l); 2263 if (fs->plr) 2264 sprintf(plr, "plr %f", 1.0 * fs->plr / (double)(0x7fffffff)); 2265 else 2266 plr[0] = '\0'; 2267 if (fs->flags_fs & DN_IS_RED) /* RED parameters */ 2268 sprintf(red, 2269 "\n\t %cRED w_q %f min_th %d max_th %d max_p %f", 2270 (fs->flags_fs & DN_IS_GENTLE_RED) ? 'G' : ' ', 2271 1.0 * fs->w_q / (double)(1 << SCALE_RED), 2272 SCALE_VAL(fs->min_th), 2273 SCALE_VAL(fs->max_th), 2274 1.0 * fs->max_p / (double)(1 << SCALE_RED)); 2275 else 2276 sprintf(red, "droptail"); 2277 2278 printf("%s %s%s %d queues (%d buckets) %s\n", 2279 prefix, qs, plr, fs->rq_elements, fs->rq_size, red); 2280} 2281 2282static void 2283list_pipes(void *data, uint nbytes, int ac, char *av[]) 2284{ 2285 int rulenum; 2286 void *next = data; 2287 struct dn_pipe *p = (struct dn_pipe *) data; 2288 struct dn_flow_set *fs; 2289 struct dn_flow_queue *q; 2290 int l; 2291 2292 if (ac > 0) 2293 rulenum = strtoul(*av++, NULL, 10); 2294 else 2295 rulenum = 0; 2296 for (; nbytes >= sizeof *p; p = (struct dn_pipe *)next) { 2297 double b = p->bandwidth; 2298 char buf[30]; 2299 char prefix[80]; 2300 2301 if (SLIST_NEXT(p, next) != (struct dn_pipe *)DN_IS_PIPE) 2302 break; /* done with pipes, now queues */ 2303 2304 /* 2305 * compute length, as pipe have variable size 2306 */ 2307 l = sizeof(*p) + p->fs.rq_elements * sizeof(*q); 2308 next = (char *)p + l; 2309 nbytes -= l; 2310 2311 if ((rulenum != 0 && rulenum != p->pipe_nr) || do_pipe == 2) 2312 continue; 2313 2314 /* 2315 * Print rate (or clocking interface) 2316 */ 2317 if (p->if_name[0] != '\0') 2318 sprintf(buf, "%s", p->if_name); 2319 else if (b == 0) 2320 sprintf(buf, "unlimited"); 2321 else if (b >= 1000000) 2322 sprintf(buf, "%7.3f Mbit/s", b/1000000); 2323 else if (b >= 1000) 2324 sprintf(buf, "%7.3f Kbit/s", b/1000); 2325 else 2326 sprintf(buf, "%7.3f bit/s ", b); 2327 2328 sprintf(prefix, "%05d: %s %4d ms ", 2329 p->pipe_nr, buf, p->delay); 2330 print_flowset_parms(&(p->fs), prefix); 2331 if (verbose) 2332 printf(" V %20qd\n", p->V >> MY_M); 2333 2334 q = (struct dn_flow_queue *)(p+1); 2335 list_queues(&(p->fs), q); 2336 } 2337 for (fs = next; nbytes >= sizeof *fs; fs = next) { 2338 char prefix[80]; 2339 2340 if (SLIST_NEXT(fs, next) != (struct dn_flow_set *)DN_IS_QUEUE) 2341 break; 2342 l = sizeof(*fs) + fs->rq_elements * sizeof(*q); 2343 next = (char *)fs + l; 2344 nbytes -= l; 2345 2346 if (rulenum != 0 && ((rulenum != fs->fs_nr && do_pipe == 2) || 2347 (rulenum != fs->parent_nr && do_pipe == 1))) { 2348 continue; 2349 } 2350 2351 q = (struct dn_flow_queue *)(fs+1); 2352 sprintf(prefix, "q%05d: weight %d pipe %d ", 2353 fs->fs_nr, fs->weight, fs->parent_nr); 2354 print_flowset_parms(fs, prefix); 2355 list_queues(fs, q); 2356 } 2357} 2358 2359/* 2360 * This one handles all set-related commands 2361 * ipfw set { show | enable | disable } 2362 * ipfw set swap X Y 2363 * ipfw set move X to Y 2364 * ipfw set move rule X to Y 2365 */ 2366static void 2367sets_handler(int ac, char *av[]) 2368{ 2369 uint32_t set_disable, masks[2]; 2370 int i, nbytes; 2371 uint16_t rulenum; 2372 uint8_t cmd, new_set; 2373 2374 ac--; 2375 av++; 2376 2377 if (!ac) 2378 errx(EX_USAGE, "set needs command"); 2379 if (_substrcmp(*av, "show") == 0) { 2380 void *data; 2381 char const *msg; 2382 2383 nbytes = sizeof(struct ip_fw); 2384 if ((data = calloc(1, nbytes)) == NULL) 2385 err(EX_OSERR, "calloc"); 2386 if (do_cmd(IP_FW_GET, data, (uintptr_t)&nbytes) < 0) 2387 err(EX_OSERR, "getsockopt(IP_FW_GET)"); 2388 bcopy(&((struct ip_fw *)data)->next_rule, 2389 &set_disable, sizeof(set_disable)); 2390 2391 for (i = 0, msg = "disable" ; i < RESVD_SET; i++) 2392 if ((set_disable & (1<<i))) { 2393 printf("%s %d", msg, i); 2394 msg = ""; 2395 } 2396 msg = (set_disable) ? " enable" : "enable"; 2397 for (i = 0; i < RESVD_SET; i++) 2398 if (!(set_disable & (1<<i))) { 2399 printf("%s %d", msg, i); 2400 msg = ""; 2401 } 2402 printf("\n"); 2403 } else if (_substrcmp(*av, "swap") == 0) { 2404 ac--; av++; 2405 if (ac != 2) 2406 errx(EX_USAGE, "set swap needs 2 set numbers\n"); 2407 rulenum = atoi(av[0]); 2408 new_set = atoi(av[1]); 2409 if (!isdigit(*(av[0])) || rulenum > RESVD_SET) 2410 errx(EX_DATAERR, "invalid set number %s\n", av[0]); 2411 if (!isdigit(*(av[1])) || new_set > RESVD_SET) 2412 errx(EX_DATAERR, "invalid set number %s\n", av[1]); 2413 masks[0] = (4 << 24) | (new_set << 16) | (rulenum); 2414 i = do_cmd(IP_FW_DEL, masks, sizeof(uint32_t)); 2415 } else if (_substrcmp(*av, "move") == 0) { 2416 ac--; av++; 2417 if (ac && _substrcmp(*av, "rule") == 0) { 2418 cmd = 2; 2419 ac--; av++; 2420 } else 2421 cmd = 3; 2422 if (ac != 3 || _substrcmp(av[1], "to") != 0) 2423 errx(EX_USAGE, "syntax: set move [rule] X to Y\n"); 2424 rulenum = atoi(av[0]); 2425 new_set = atoi(av[2]); 2426 if (!isdigit(*(av[0])) || (cmd == 3 && rulenum > RESVD_SET) || 2427 (cmd == 2 && rulenum == IPFW_DEFAULT_RULE) ) 2428 errx(EX_DATAERR, "invalid source number %s\n", av[0]); 2429 if (!isdigit(*(av[2])) || new_set > RESVD_SET) 2430 errx(EX_DATAERR, "invalid dest. set %s\n", av[1]); 2431 masks[0] = (cmd << 24) | (new_set << 16) | (rulenum); 2432 i = do_cmd(IP_FW_DEL, masks, sizeof(uint32_t)); 2433 } else if (_substrcmp(*av, "disable") == 0 || 2434 _substrcmp(*av, "enable") == 0 ) { 2435 int which = _substrcmp(*av, "enable") == 0 ? 1 : 0; 2436 2437 ac--; av++; 2438 masks[0] = masks[1] = 0; 2439 2440 while (ac) { 2441 if (isdigit(**av)) { 2442 i = atoi(*av); 2443 if (i < 0 || i > RESVD_SET) 2444 errx(EX_DATAERR, 2445 "invalid set number %d\n", i); 2446 masks[which] |= (1<<i); 2447 } else if (_substrcmp(*av, "disable") == 0) 2448 which = 0; 2449 else if (_substrcmp(*av, "enable") == 0) 2450 which = 1; 2451 else 2452 errx(EX_DATAERR, 2453 "invalid set command %s\n", *av); 2454 av++; ac--; 2455 } 2456 if ( (masks[0] & masks[1]) != 0 ) 2457 errx(EX_DATAERR, 2458 "cannot enable and disable the same set\n"); 2459 2460 i = do_cmd(IP_FW_DEL, masks, sizeof(masks)); 2461 if (i) 2462 warn("set enable/disable: setsockopt(IP_FW_DEL)"); 2463 } else 2464 errx(EX_USAGE, "invalid set command %s\n", *av); 2465} 2466 2467static void 2468sysctl_handler(int ac, char *av[], int which) 2469{ 2470 ac--; 2471 av++; 2472 2473 if (ac == 0) { 2474 warnx("missing keyword to enable/disable\n"); 2475 } else if (_substrcmp(*av, "firewall") == 0) { 2476 sysctlbyname("net.inet.ip.fw.enable", NULL, 0, 2477 &which, sizeof(which)); 2478 } else if (_substrcmp(*av, "one_pass") == 0) { 2479 sysctlbyname("net.inet.ip.fw.one_pass", NULL, 0, 2480 &which, sizeof(which)); 2481 } else if (_substrcmp(*av, "debug") == 0) { 2482 sysctlbyname("net.inet.ip.fw.debug", NULL, 0, 2483 &which, sizeof(which)); 2484 } else if (_substrcmp(*av, "verbose") == 0) { 2485 sysctlbyname("net.inet.ip.fw.verbose", NULL, 0, 2486 &which, sizeof(which)); 2487 } else if (_substrcmp(*av, "dyn_keepalive") == 0) { 2488 sysctlbyname("net.inet.ip.fw.dyn_keepalive", NULL, 0, 2489 &which, sizeof(which)); 2490 } else if (_substrcmp(*av, "altq") == 0) { 2491 altq_set_enabled(which); 2492 } else { 2493 warnx("unrecognize enable/disable keyword: %s\n", *av); 2494 } 2495} 2496 2497static void 2498list(int ac, char *av[], int show_counters) 2499{ 2500 struct ip_fw *r; 2501 ipfw_dyn_rule *dynrules, *d; 2502 2503#define NEXT(r) ((struct ip_fw *)((char *)r + RULESIZE(r))) 2504 char *lim; 2505 void *data = NULL; 2506 int bcwidth, n, nbytes, nstat, ndyn, pcwidth, width; 2507 int exitval = EX_OK; 2508 int lac; 2509 char **lav; 2510 u_long rnum, last; 2511 char *endptr; 2512 int seen = 0; 2513 uint8_t set; 2514 2515 const int ocmd = do_pipe ? IP_DUMMYNET_GET : IP_FW_GET; 2516 int nalloc = 1024; /* start somewhere... */ 2517 2518 last = 0; 2519 2520 if (test_only) { 2521 fprintf(stderr, "Testing only, list disabled\n"); 2522 return; 2523 } 2524 2525 ac--; 2526 av++; 2527 2528 /* get rules or pipes from kernel, resizing array as necessary */ 2529 nbytes = nalloc; 2530 2531 while (nbytes >= nalloc) { 2532 nalloc = nalloc * 2 + 200; 2533 nbytes = nalloc; 2534 if ((data = realloc(data, nbytes)) == NULL) 2535 err(EX_OSERR, "realloc"); 2536 if (do_cmd(ocmd, data, (uintptr_t)&nbytes) < 0) 2537 err(EX_OSERR, "getsockopt(IP_%s_GET)", 2538 do_pipe ? "DUMMYNET" : "FW"); 2539 } 2540 2541 if (do_pipe) { 2542 list_pipes(data, nbytes, ac, av); 2543 goto done; 2544 } 2545 2546 /* 2547 * Count static rules. They have variable size so we 2548 * need to scan the list to count them. 2549 */ 2550 for (nstat = 1, r = data, lim = (char *)data + nbytes; 2551 r->rulenum < IPFW_DEFAULT_RULE && (char *)r < lim; 2552 ++nstat, r = NEXT(r) ) 2553 ; /* nothing */ 2554 2555 /* 2556 * Count dynamic rules. This is easier as they have 2557 * fixed size. 2558 */ 2559 r = NEXT(r); 2560 dynrules = (ipfw_dyn_rule *)r ; 2561 n = (char *)r - (char *)data; 2562 ndyn = (nbytes - n) / sizeof *dynrules; 2563 2564 /* if showing stats, figure out column widths ahead of time */ 2565 bcwidth = pcwidth = 0; 2566 if (show_counters) { 2567 for (n = 0, r = data; n < nstat; n++, r = NEXT(r)) { 2568 /* skip rules from another set */ 2569 if (use_set && r->set != use_set - 1) 2570 continue; 2571 2572 /* packet counter */ 2573 width = snprintf(NULL, 0, "%llu", 2574 align_uint64(&r->pcnt)); 2575 if (width > pcwidth) 2576 pcwidth = width; 2577 2578 /* byte counter */ 2579 width = snprintf(NULL, 0, "%llu", 2580 align_uint64(&r->bcnt)); 2581 if (width > bcwidth) 2582 bcwidth = width; 2583 } 2584 } 2585 if (do_dynamic && ndyn) { 2586 for (n = 0, d = dynrules; n < ndyn; n++, d++) { 2587 if (use_set) { 2588 /* skip rules from another set */ 2589 bcopy((char *)&d->rule + sizeof(uint16_t), 2590 &set, sizeof(uint8_t)); 2591 if (set != use_set - 1) 2592 continue; 2593 } 2594 width = snprintf(NULL, 0, "%llu", 2595 align_uint64(&d->pcnt)); 2596 if (width > pcwidth) 2597 pcwidth = width; 2598 2599 width = snprintf(NULL, 0, "%llu", 2600 align_uint64(&d->bcnt)); 2601 if (width > bcwidth) 2602 bcwidth = width; 2603 } 2604 } 2605 /* if no rule numbers were specified, list all rules */ 2606 if (ac == 0) { 2607 for (n = 0, r = data; n < nstat; n++, r = NEXT(r)) { 2608 if (use_set && r->set != use_set - 1) 2609 continue; 2610 show_ipfw(r, pcwidth, bcwidth); 2611 } 2612 2613 if (do_dynamic && ndyn) { 2614 printf("## Dynamic rules (%d):\n", ndyn); 2615 for (n = 0, d = dynrules; n < ndyn; n++, d++) { 2616 if (use_set) { 2617 bcopy((char *)&d->rule + sizeof(uint16_t), 2618 &set, sizeof(uint8_t)); 2619 if (set != use_set - 1) 2620 continue; 2621 } 2622 show_dyn_ipfw(d, pcwidth, bcwidth); 2623 } 2624 } 2625 goto done; 2626 } 2627 2628 /* display specific rules requested on command line */ 2629 2630 for (lac = ac, lav = av; lac != 0; lac--) { 2631 /* convert command line rule # */ 2632 last = rnum = strtoul(*lav++, &endptr, 10); 2633 if (*endptr == '-') 2634 last = strtoul(endptr+1, &endptr, 10); 2635 if (*endptr) { 2636 exitval = EX_USAGE; 2637 warnx("invalid rule number: %s", *(lav - 1)); 2638 continue; 2639 } 2640 for (n = seen = 0, r = data; n < nstat; n++, r = NEXT(r) ) { 2641 if (r->rulenum > last) 2642 break; 2643 if (use_set && r->set != use_set - 1) 2644 continue; 2645 if (r->rulenum >= rnum && r->rulenum <= last) { 2646 show_ipfw(r, pcwidth, bcwidth); 2647 seen = 1; 2648 } 2649 } 2650 if (!seen) { 2651 /* give precedence to other error(s) */ 2652 if (exitval == EX_OK) 2653 exitval = EX_UNAVAILABLE; 2654 warnx("rule %lu does not exist", rnum); 2655 } 2656 } 2657 2658 if (do_dynamic && ndyn) { 2659 printf("## Dynamic rules:\n"); 2660 for (lac = ac, lav = av; lac != 0; lac--) { 2661 last = rnum = strtoul(*lav++, &endptr, 10); 2662 if (*endptr == '-') 2663 last = strtoul(endptr+1, &endptr, 10); 2664 if (*endptr) 2665 /* already warned */ 2666 continue; 2667 for (n = 0, d = dynrules; n < ndyn; n++, d++) { 2668 uint16_t rulenum; 2669 2670 bcopy(&d->rule, &rulenum, sizeof(rulenum)); 2671 if (rulenum > rnum) 2672 break; 2673 if (use_set) { 2674 bcopy((char *)&d->rule + sizeof(uint16_t), 2675 &set, sizeof(uint8_t)); 2676 if (set != use_set - 1) 2677 continue; 2678 } 2679 if (r->rulenum >= rnum && r->rulenum <= last) 2680 show_dyn_ipfw(d, pcwidth, bcwidth); 2681 } 2682 } 2683 } 2684 2685 ac = 0; 2686 2687done: 2688 free(data); 2689 2690 if (exitval != EX_OK) 2691 exit(exitval); 2692#undef NEXT 2693} 2694 2695static void 2696show_usage(void) 2697{ 2698 fprintf(stderr, "usage: ipfw [options]\n" 2699"do \"ipfw -h\" or see ipfw manpage for details\n" 2700); 2701 exit(EX_USAGE); 2702} 2703 2704static void 2705help(void) 2706{ 2707 fprintf(stderr, 2708"ipfw syntax summary (but please do read the ipfw(8) manpage):\n" 2709"ipfw [-abcdefhnNqStTv] <command> where <command> is one of:\n" 2710"add [num] [set N] [prob x] RULE-BODY\n" 2711"{pipe|queue} N config PIPE-BODY\n" 2712"[pipe|queue] {zero|delete|show} [N{,N}]\n" 2713"nat N config {ip IPADDR|if IFNAME|log|deny_in|same_ports|unreg_only|reset|\n" 2714" reverse|proxy_only|redirect_addr linkspec|\n" 2715" redirect_port linkspec|redirect_proto linkspec}\n" 2716"set [disable N... enable N...] | move [rule] X to Y | swap X Y | show\n" 2717"set N {show|list|zero|resetlog|delete} [N{,N}] | flush\n" 2718"table N {add ip[/bits] [value] | delete ip[/bits] | flush | list}\n" 2719"table all {flush | list}\n" 2720"\n" 2721"RULE-BODY: check-state [PARAMS] | ACTION [PARAMS] ADDR [OPTION_LIST]\n" 2722"ACTION: check-state | allow | count | deny | unreach{,6} CODE |\n" 2723" skipto N | {divert|tee} PORT | forward ADDR |\n" 2724" pipe N | queue N | nat N | setfib FIB\n" 2725"PARAMS: [log [logamount LOGLIMIT]] [altq QUEUE_NAME]\n" 2726"ADDR: [ MAC dst src ether_type ] \n" 2727" [ ip from IPADDR [ PORT ] to IPADDR [ PORTLIST ] ]\n" 2728" [ ipv6|ip6 from IP6ADDR [ PORT ] to IP6ADDR [ PORTLIST ] ]\n" 2729"IPADDR: [not] { any | me | ip/bits{x,y,z} | table(t[,v]) | IPLIST }\n" 2730"IP6ADDR: [not] { any | me | me6 | ip6/bits | IP6LIST }\n" 2731"IP6LIST: { ip6 | ip6/bits }[,IP6LIST]\n" 2732"IPLIST: { ip | ip/bits | ip:mask }[,IPLIST]\n" 2733"OPTION_LIST: OPTION [OPTION_LIST]\n" 2734"OPTION: bridged | diverted | diverted-loopback | diverted-output |\n" 2735" {dst-ip|src-ip} IPADDR | {dst-ip6|src-ip6|dst-ipv6|src-ipv6} IP6ADDR |\n" 2736" {dst-port|src-port} LIST |\n" 2737" estab | frag | {gid|uid} N | icmptypes LIST | in | out | ipid LIST |\n" 2738" iplen LIST | ipoptions SPEC | ipprecedence | ipsec | iptos SPEC |\n" 2739" ipttl LIST | ipversion VER | keep-state | layer2 | limit ... |\n" 2740" icmp6types LIST | ext6hdr LIST | flow-id N[,N] | fib FIB |\n" 2741" mac ... | mac-type LIST | proto LIST | {recv|xmit|via} {IF|IPADDR} |\n" 2742" setup | {tcpack|tcpseq|tcpwin} NN | tcpflags SPEC | tcpoptions SPEC |\n" 2743" tcpdatalen LIST | verrevpath | versrcreach | antispoof\n" 2744); 2745exit(0); 2746} 2747 2748 2749static int 2750lookup_host (char *host, struct in_addr *ipaddr) 2751{ 2752 struct hostent *he; 2753 2754 if (!inet_aton(host, ipaddr)) { 2755 if ((he = gethostbyname(host)) == NULL) 2756 return(-1); 2757 *ipaddr = *(struct in_addr *)he->h_addr_list[0]; 2758 } 2759 return(0); 2760} 2761 2762/* 2763 * fills the addr and mask fields in the instruction as appropriate from av. 2764 * Update length as appropriate. 2765 * The following formats are allowed: 2766 * me returns O_IP_*_ME 2767 * 1.2.3.4 single IP address 2768 * 1.2.3.4:5.6.7.8 address:mask 2769 * 1.2.3.4/24 address/mask 2770 * 1.2.3.4/26{1,6,5,4,23} set of addresses in a subnet 2771 * We can have multiple comma-separated address/mask entries. 2772 */ 2773static void 2774fill_ip(ipfw_insn_ip *cmd, char *av) 2775{ 2776 int len = 0; 2777 uint32_t *d = ((ipfw_insn_u32 *)cmd)->d; 2778 2779 cmd->o.len &= ~F_LEN_MASK; /* zero len */ 2780 2781 if (_substrcmp(av, "any") == 0) 2782 return; 2783 2784 if (_substrcmp(av, "me") == 0) { 2785 cmd->o.len |= F_INSN_SIZE(ipfw_insn); 2786 return; 2787 } 2788 2789 if (strncmp(av, "table(", 6) == 0) { 2790 char *p = strchr(av + 6, ','); 2791 2792 if (p) 2793 *p++ = '\0'; 2794 cmd->o.opcode = O_IP_DST_LOOKUP; 2795 cmd->o.arg1 = strtoul(av + 6, NULL, 0); 2796 if (p) { 2797 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32); 2798 d[0] = strtoul(p, NULL, 0); 2799 } else 2800 cmd->o.len |= F_INSN_SIZE(ipfw_insn); 2801 return; 2802 } 2803 2804 while (av) { 2805 /* 2806 * After the address we can have '/' or ':' indicating a mask, 2807 * ',' indicating another address follows, '{' indicating a 2808 * set of addresses of unspecified size. 2809 */ 2810 char *t = NULL, *p = strpbrk(av, "/:,{"); 2811 int masklen; 2812 char md, nd = '\0'; 2813 2814 if (p) { 2815 md = *p; 2816 *p++ = '\0'; 2817 if ((t = strpbrk(p, ",{")) != NULL) { 2818 nd = *t; 2819 *t = '\0'; 2820 } 2821 } else 2822 md = '\0'; 2823 2824 if (lookup_host(av, (struct in_addr *)&d[0]) != 0) 2825 errx(EX_NOHOST, "hostname ``%s'' unknown", av); 2826 switch (md) { 2827 case ':': 2828 if (!inet_aton(p, (struct in_addr *)&d[1])) 2829 errx(EX_DATAERR, "bad netmask ``%s''", p); 2830 break; 2831 case '/': 2832 masklen = atoi(p); 2833 if (masklen == 0) 2834 d[1] = htonl(0); /* mask */ 2835 else if (masklen > 32) 2836 errx(EX_DATAERR, "bad width ``%s''", p); 2837 else 2838 d[1] = htonl(~0 << (32 - masklen)); 2839 break; 2840 case '{': /* no mask, assume /24 and put back the '{' */ 2841 d[1] = htonl(~0 << (32 - 24)); 2842 *(--p) = md; 2843 break; 2844 2845 case ',': /* single address plus continuation */ 2846 *(--p) = md; 2847 /* FALLTHROUGH */ 2848 case 0: /* initialization value */ 2849 default: 2850 d[1] = htonl(~0); /* force /32 */ 2851 break; 2852 } 2853 d[0] &= d[1]; /* mask base address with mask */ 2854 if (t) 2855 *t = nd; 2856 /* find next separator */ 2857 if (p) 2858 p = strpbrk(p, ",{"); 2859 if (p && *p == '{') { 2860 /* 2861 * We have a set of addresses. They are stored as follows: 2862 * arg1 is the set size (powers of 2, 2..256) 2863 * addr is the base address IN HOST FORMAT 2864 * mask.. is an array of arg1 bits (rounded up to 2865 * the next multiple of 32) with bits set 2866 * for each host in the map. 2867 */ 2868 uint32_t *map = (uint32_t *)&cmd->mask; 2869 int low, high; 2870 int i = contigmask((uint8_t *)&(d[1]), 32); 2871 2872 if (len > 0) 2873 errx(EX_DATAERR, "address set cannot be in a list"); 2874 if (i < 24 || i > 31) 2875 errx(EX_DATAERR, "invalid set with mask %d\n", i); 2876 cmd->o.arg1 = 1<<(32-i); /* map length */ 2877 d[0] = ntohl(d[0]); /* base addr in host format */ 2878 cmd->o.opcode = O_IP_DST_SET; /* default */ 2879 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32) + (cmd->o.arg1+31)/32; 2880 for (i = 0; i < (cmd->o.arg1+31)/32 ; i++) 2881 map[i] = 0; /* clear map */ 2882 2883 av = p + 1; 2884 low = d[0] & 0xff; 2885 high = low + cmd->o.arg1 - 1; 2886 /* 2887 * Here, i stores the previous value when we specify a range 2888 * of addresses within a mask, e.g. 45-63. i = -1 means we 2889 * have no previous value. 2890 */ 2891 i = -1; /* previous value in a range */ 2892 while (isdigit(*av)) { 2893 char *s; 2894 int a = strtol(av, &s, 0); 2895 2896 if (s == av) { /* no parameter */ 2897 if (*av != '}') 2898 errx(EX_DATAERR, "set not closed\n"); 2899 if (i != -1) 2900 errx(EX_DATAERR, "incomplete range %d-", i); 2901 break; 2902 } 2903 if (a < low || a > high) 2904 errx(EX_DATAERR, "addr %d out of range [%d-%d]\n", 2905 a, low, high); 2906 a -= low; 2907 if (i == -1) /* no previous in range */ 2908 i = a; 2909 else { /* check that range is valid */ 2910 if (i > a) 2911 errx(EX_DATAERR, "invalid range %d-%d", 2912 i+low, a+low); 2913 if (*s == '-') 2914 errx(EX_DATAERR, "double '-' in range"); 2915 } 2916 for (; i <= a; i++) 2917 map[i/32] |= 1<<(i & 31); 2918 i = -1; 2919 if (*s == '-') 2920 i = a; 2921 else if (*s == '}') 2922 break; 2923 av = s+1; 2924 } 2925 return; 2926 } 2927 av = p; 2928 if (av) /* then *av must be a ',' */ 2929 av++; 2930 2931 /* Check this entry */ 2932 if (d[1] == 0) { /* "any", specified as x.x.x.x/0 */ 2933 /* 2934 * 'any' turns the entire list into a NOP. 2935 * 'not any' never matches, so it is removed from the 2936 * list unless it is the only item, in which case we 2937 * report an error. 2938 */ 2939 if (cmd->o.len & F_NOT) { /* "not any" never matches */ 2940 if (av == NULL && len == 0) /* only this entry */ 2941 errx(EX_DATAERR, "not any never matches"); 2942 } 2943 /* else do nothing and skip this entry */ 2944 return; 2945 } 2946 /* A single IP can be stored in an optimized format */ 2947 if (d[1] == IP_MASK_ALL && av == NULL && len == 0) { 2948 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32); 2949 return; 2950 } 2951 len += 2; /* two words... */ 2952 d += 2; 2953 } /* end while */ 2954 if (len + 1 > F_LEN_MASK) 2955 errx(EX_DATAERR, "address list too long"); 2956 cmd->o.len |= len+1; 2957} 2958 2959 2960/* Try to find ipv6 address by hostname */ 2961static int 2962lookup_host6 (char *host, struct in6_addr *ip6addr) 2963{ 2964 struct hostent *he; 2965 2966 if (!inet_pton(AF_INET6, host, ip6addr)) { 2967 if ((he = gethostbyname2(host, AF_INET6)) == NULL) 2968 return(-1); 2969 memcpy(ip6addr, he->h_addr_list[0], sizeof( struct in6_addr)); 2970 } 2971 return(0); 2972} 2973 2974 2975/* n2mask sets n bits of the mask */ 2976static void 2977n2mask(struct in6_addr *mask, int n) 2978{ 2979 static int minimask[9] = 2980 { 0x00, 0x80, 0xc0, 0xe0, 0xf0, 0xf8, 0xfc, 0xfe, 0xff }; 2981 u_char *p; 2982 2983 memset(mask, 0, sizeof(struct in6_addr)); 2984 p = (u_char *) mask; 2985 for (; n > 0; p++, n -= 8) { 2986 if (n >= 8) 2987 *p = 0xff; 2988 else 2989 *p = minimask[n]; 2990 } 2991 return; 2992} 2993 2994 2995/* 2996 * fill the addr and mask fields in the instruction as appropriate from av. 2997 * Update length as appropriate. 2998 * The following formats are allowed: 2999 * any matches any IP6. Actually returns an empty instruction. 3000 * me returns O_IP6_*_ME 3001 * 3002 * 03f1::234:123:0342 single IP6 addres 3003 * 03f1::234:123:0342/24 address/mask 3004 * 03f1::234:123:0342/24,03f1::234:123:0343/ List of address 3005 * 3006 * Set of address (as in ipv6) not supported because ipv6 address 3007 * are typically random past the initial prefix. 3008 * Return 1 on success, 0 on failure. 3009 */ 3010static int 3011fill_ip6(ipfw_insn_ip6 *cmd, char *av) 3012{ 3013 int len = 0; 3014 struct in6_addr *d = &(cmd->addr6); 3015 /* 3016 * Needed for multiple address. 3017 * Note d[1] points to struct in6_add r mask6 of cmd 3018 */ 3019 3020 cmd->o.len &= ~F_LEN_MASK; /* zero len */ 3021 3022 if (strcmp(av, "any") == 0) 3023 return (1); 3024 3025 3026 if (strcmp(av, "me") == 0) { /* Set the data for "me" opt*/ 3027 cmd->o.len |= F_INSN_SIZE(ipfw_insn); 3028 return (1); 3029 } 3030 3031 if (strcmp(av, "me6") == 0) { /* Set the data for "me" opt*/ 3032 cmd->o.len |= F_INSN_SIZE(ipfw_insn); 3033 return (1); 3034 } 3035 3036 av = strdup(av); 3037 while (av) { 3038 /* 3039 * After the address we can have '/' indicating a mask, 3040 * or ',' indicating another address follows. 3041 */ 3042 3043 char *p; 3044 int masklen; 3045 char md = '\0'; 3046 3047 if ((p = strpbrk(av, "/,")) ) { 3048 md = *p; /* save the separator */ 3049 *p = '\0'; /* terminate address string */ 3050 p++; /* and skip past it */ 3051 } 3052 /* now p points to NULL, mask or next entry */ 3053 3054 /* lookup stores address in *d as a side effect */ 3055 if (lookup_host6(av, d) != 0) { 3056 /* XXX: failed. Free memory and go */ 3057 errx(EX_DATAERR, "bad address \"%s\"", av); 3058 } 3059 /* next, look at the mask, if any */ 3060 masklen = (md == '/') ? atoi(p) : 128; 3061 if (masklen > 128 || masklen < 0) 3062 errx(EX_DATAERR, "bad width \"%s\''", p); 3063 else 3064 n2mask(&d[1], masklen); 3065 3066 APPLY_MASK(d, &d[1]) /* mask base address with mask */ 3067 3068 /* find next separator */ 3069 3070 if (md == '/') { /* find separator past the mask */ 3071 p = strpbrk(p, ","); 3072 if (p != NULL) 3073 p++; 3074 } 3075 av = p; 3076 3077 /* Check this entry */ 3078 if (masklen == 0) { 3079 /* 3080 * 'any' turns the entire list into a NOP. 3081 * 'not any' never matches, so it is removed from the 3082 * list unless it is the only item, in which case we 3083 * report an error. 3084 */ 3085 if (cmd->o.len & F_NOT && av == NULL && len == 0) 3086 errx(EX_DATAERR, "not any never matches"); 3087 continue; 3088 } 3089 3090 /* 3091 * A single IP can be stored alone 3092 */ 3093 if (masklen == 128 && av == NULL && len == 0) { 3094 len = F_INSN_SIZE(struct in6_addr); 3095 break; 3096 } 3097 3098 /* Update length and pointer to arguments */ 3099 len += F_INSN_SIZE(struct in6_addr)*2; 3100 d += 2; 3101 } /* end while */ 3102 3103 /* 3104 * Total length of the command, remember that 1 is the size of 3105 * the base command. 3106 */ 3107 if (len + 1 > F_LEN_MASK) 3108 errx(EX_DATAERR, "address list too long"); 3109 cmd->o.len |= len+1; 3110 free(av); 3111 return (1); 3112} 3113 3114/* 3115 * fills command for ipv6 flow-id filtering 3116 * note that the 20 bit flow number is stored in a array of u_int32_t 3117 * it's supported lists of flow-id, so in the o.arg1 we store how many 3118 * additional flow-id we want to filter, the basic is 1 3119 */ 3120static void 3121fill_flow6( ipfw_insn_u32 *cmd, char *av ) 3122{ 3123 u_int32_t type; /* Current flow number */ 3124 u_int16_t nflow = 0; /* Current flow index */ 3125 char *s = av; 3126 cmd->d[0] = 0; /* Initializing the base number*/ 3127 3128 while (s) { 3129 av = strsep( &s, ",") ; 3130 type = strtoul(av, &av, 0); 3131 if (*av != ',' && *av != '\0') 3132 errx(EX_DATAERR, "invalid ipv6 flow number %s", av); 3133 if (type > 0xfffff) 3134 errx(EX_DATAERR, "flow number out of range %s", av); 3135 cmd->d[nflow] |= type; 3136 nflow++; 3137 } 3138 if( nflow > 0 ) { 3139 cmd->o.opcode = O_FLOW6ID; 3140 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32) + nflow; 3141 cmd->o.arg1 = nflow; 3142 } 3143 else { 3144 errx(EX_DATAERR, "invalid ipv6 flow number %s", av); 3145 } 3146} 3147 3148static ipfw_insn * 3149add_srcip6(ipfw_insn *cmd, char *av) 3150{ 3151 3152 fill_ip6((ipfw_insn_ip6 *)cmd, av); 3153 if (F_LEN(cmd) == 0) { /* any */ 3154 } else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn)) { /* "me" */ 3155 cmd->opcode = O_IP6_SRC_ME; 3156 } else if (F_LEN(cmd) == 3157 (F_INSN_SIZE(struct in6_addr) + F_INSN_SIZE(ipfw_insn))) { 3158 /* single IP, no mask*/ 3159 cmd->opcode = O_IP6_SRC; 3160 } else { /* addr/mask opt */ 3161 cmd->opcode = O_IP6_SRC_MASK; 3162 } 3163 return cmd; 3164} 3165 3166static ipfw_insn * 3167add_dstip6(ipfw_insn *cmd, char *av) 3168{ 3169 3170 fill_ip6((ipfw_insn_ip6 *)cmd, av); 3171 if (F_LEN(cmd) == 0) { /* any */ 3172 } else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn)) { /* "me" */ 3173 cmd->opcode = O_IP6_DST_ME; 3174 } else if (F_LEN(cmd) == 3175 (F_INSN_SIZE(struct in6_addr) + F_INSN_SIZE(ipfw_insn))) { 3176 /* single IP, no mask*/ 3177 cmd->opcode = O_IP6_DST; 3178 } else { /* addr/mask opt */ 3179 cmd->opcode = O_IP6_DST_MASK; 3180 } 3181 return cmd; 3182} 3183 3184 3185/* 3186 * helper function to process a set of flags and set bits in the 3187 * appropriate masks. 3188 */ 3189static void 3190fill_flags(ipfw_insn *cmd, enum ipfw_opcodes opcode, 3191 struct _s_x *flags, char *p) 3192{ 3193 uint8_t set=0, clear=0; 3194 3195 while (p && *p) { 3196 char *q; /* points to the separator */ 3197 int val; 3198 uint8_t *which; /* mask we are working on */ 3199 3200 if (*p == '!') { 3201 p++; 3202 which = &clear; 3203 } else 3204 which = &set; 3205 q = strchr(p, ','); 3206 if (q) 3207 *q++ = '\0'; 3208 val = match_token(flags, p); 3209 if (val <= 0) 3210 errx(EX_DATAERR, "invalid flag %s", p); 3211 *which |= (uint8_t)val; 3212 p = q; 3213 } 3214 cmd->opcode = opcode; 3215 cmd->len = (cmd->len & (F_NOT | F_OR)) | 1; 3216 cmd->arg1 = (set & 0xff) | ( (clear & 0xff) << 8); 3217} 3218 3219 3220static void 3221delete(int ac, char *av[]) 3222{ 3223 uint32_t rulenum; 3224 struct dn_pipe p; 3225 int i; 3226 int exitval = EX_OK; 3227 int do_set = 0; 3228 3229 memset(&p, 0, sizeof p); 3230 3231 av++; ac--; 3232 NEED1("missing rule specification"); 3233 if (ac > 0 && _substrcmp(*av, "set") == 0) { 3234 /* Do not allow using the following syntax: 3235 * ipfw set N delete set M 3236 */ 3237 if (use_set) 3238 errx(EX_DATAERR, "invalid syntax"); 3239 do_set = 1; /* delete set */ 3240 ac--; av++; 3241 } 3242 3243 /* Rule number */ 3244 while (ac && isdigit(**av)) { 3245 i = atoi(*av); av++; ac--; 3246 if (do_nat) { 3247 exitval = do_cmd(IP_FW_NAT_DEL, &i, sizeof i); 3248 if (exitval) { 3249 exitval = EX_UNAVAILABLE; 3250 warn("rule %u not available", i); 3251 } 3252 } else if (do_pipe) { 3253 if (do_pipe == 1) 3254 p.pipe_nr = i; 3255 else 3256 p.fs.fs_nr = i; 3257 i = do_cmd(IP_DUMMYNET_DEL, &p, sizeof p); 3258 if (i) { 3259 exitval = 1; 3260 warn("rule %u: setsockopt(IP_DUMMYNET_DEL)", 3261 do_pipe == 1 ? p.pipe_nr : p.fs.fs_nr); 3262 } 3263 } else { 3264 if (use_set) 3265 rulenum = (i & 0xffff) | (5 << 24) | 3266 ((use_set - 1) << 16); 3267 else 3268 rulenum = (i & 0xffff) | (do_set << 24); 3269 i = do_cmd(IP_FW_DEL, &rulenum, sizeof rulenum); 3270 if (i) { 3271 exitval = EX_UNAVAILABLE; 3272 warn("rule %u: setsockopt(IP_FW_DEL)", 3273 rulenum); 3274 } 3275 } 3276 } 3277 if (exitval != EX_OK) 3278 exit(exitval); 3279} 3280 3281 3282/* 3283 * fill the interface structure. We do not check the name as we can 3284 * create interfaces dynamically, so checking them at insert time 3285 * makes relatively little sense. 3286 * Interface names containing '*', '?', or '[' are assumed to be shell 3287 * patterns which match interfaces. 3288 */ 3289static void 3290fill_iface(ipfw_insn_if *cmd, char *arg) 3291{ 3292 cmd->name[0] = '\0'; 3293 cmd->o.len |= F_INSN_SIZE(ipfw_insn_if); 3294 3295 /* Parse the interface or address */ 3296 if (strcmp(arg, "any") == 0) 3297 cmd->o.len = 0; /* effectively ignore this command */ 3298 else if (!isdigit(*arg)) { 3299 strlcpy(cmd->name, arg, sizeof(cmd->name)); 3300 cmd->p.glob = strpbrk(arg, "*?[") != NULL ? 1 : 0; 3301 } else if (!inet_aton(arg, &cmd->p.ip)) 3302 errx(EX_DATAERR, "bad ip address ``%s''", arg); 3303} 3304 3305/* 3306 * Search for interface with name "ifn", and fill n accordingly: 3307 * 3308 * n->ip ip address of interface "ifn" 3309 * n->if_name copy of interface name "ifn" 3310 */ 3311static void 3312set_addr_dynamic(const char *ifn, struct cfg_nat *n) 3313{ 3314 size_t needed; 3315 int mib[6]; 3316 char *buf, *lim, *next; 3317 struct if_msghdr *ifm; 3318 struct ifa_msghdr *ifam; 3319 struct sockaddr_dl *sdl; 3320 struct sockaddr_in *sin; 3321 int ifIndex, ifMTU; 3322 3323 mib[0] = CTL_NET; 3324 mib[1] = PF_ROUTE; 3325 mib[2] = 0; 3326 mib[3] = AF_INET; 3327 mib[4] = NET_RT_IFLIST; 3328 mib[5] = 0; 3329/* 3330 * Get interface data. 3331 */ 3332 if (sysctl(mib, 6, NULL, &needed, NULL, 0) == -1) 3333 err(1, "iflist-sysctl-estimate"); 3334 if ((buf = malloc(needed)) == NULL) 3335 errx(1, "malloc failed"); 3336 if (sysctl(mib, 6, buf, &needed, NULL, 0) == -1) 3337 err(1, "iflist-sysctl-get"); 3338 lim = buf + needed; 3339/* 3340 * Loop through interfaces until one with 3341 * given name is found. This is done to 3342 * find correct interface index for routing 3343 * message processing. 3344 */ 3345 ifIndex = 0; 3346 next = buf; 3347 while (next < lim) { 3348 ifm = (struct if_msghdr *)next; 3349 next += ifm->ifm_msglen; 3350 if (ifm->ifm_version != RTM_VERSION) { 3351 if (verbose) 3352 warnx("routing message version %d " 3353 "not understood", ifm->ifm_version); 3354 continue; 3355 } 3356 if (ifm->ifm_type == RTM_IFINFO) { 3357 sdl = (struct sockaddr_dl *)(ifm + 1); 3358 if (strlen(ifn) == sdl->sdl_nlen && 3359 strncmp(ifn, sdl->sdl_data, sdl->sdl_nlen) == 0) { 3360 ifIndex = ifm->ifm_index; 3361 ifMTU = ifm->ifm_data.ifi_mtu; 3362 break; 3363 } 3364 } 3365 } 3366 if (!ifIndex) 3367 errx(1, "unknown interface name %s", ifn); 3368/* 3369 * Get interface address. 3370 */ 3371 sin = NULL; 3372 while (next < lim) { 3373 ifam = (struct ifa_msghdr *)next; 3374 next += ifam->ifam_msglen; 3375 if (ifam->ifam_version != RTM_VERSION) { 3376 if (verbose) 3377 warnx("routing message version %d " 3378 "not understood", ifam->ifam_version); 3379 continue; 3380 } 3381 if (ifam->ifam_type != RTM_NEWADDR) 3382 break; 3383 if (ifam->ifam_addrs & RTA_IFA) { 3384 int i; 3385 char *cp = (char *)(ifam + 1); 3386 3387 for (i = 1; i < RTA_IFA; i <<= 1) { 3388 if (ifam->ifam_addrs & i) 3389 cp += SA_SIZE((struct sockaddr *)cp); 3390 } 3391 if (((struct sockaddr *)cp)->sa_family == AF_INET) { 3392 sin = (struct sockaddr_in *)cp; 3393 break; 3394 } 3395 } 3396 } 3397 if (sin == NULL) 3398 errx(1, "%s: cannot get interface address", ifn); 3399 3400 n->ip = sin->sin_addr; 3401 strncpy(n->if_name, ifn, IF_NAMESIZE); 3402 3403 free(buf); 3404} 3405 3406/* 3407 * XXX - The following functions, macros and definitions come from natd.c: 3408 * it would be better to move them outside natd.c, in a file 3409 * (redirect_support.[ch]?) shared by ipfw and natd, but for now i can live 3410 * with it. 3411 */ 3412 3413/* 3414 * Definition of a port range, and macros to deal with values. 3415 * FORMAT: HI 16-bits == first port in range, 0 == all ports. 3416 * LO 16-bits == number of ports in range 3417 * NOTES: - Port values are not stored in network byte order. 3418 */ 3419 3420#define port_range u_long 3421 3422#define GETLOPORT(x) ((x) >> 0x10) 3423#define GETNUMPORTS(x) ((x) & 0x0000ffff) 3424#define GETHIPORT(x) (GETLOPORT((x)) + GETNUMPORTS((x))) 3425 3426/* Set y to be the low-port value in port_range variable x. */ 3427#define SETLOPORT(x,y) ((x) = ((x) & 0x0000ffff) | ((y) << 0x10)) 3428 3429/* Set y to be the number of ports in port_range variable x. */ 3430#define SETNUMPORTS(x,y) ((x) = ((x) & 0xffff0000) | (y)) 3431 3432static void 3433StrToAddr (const char* str, struct in_addr* addr) 3434{ 3435 struct hostent* hp; 3436 3437 if (inet_aton (str, addr)) 3438 return; 3439 3440 hp = gethostbyname (str); 3441 if (!hp) 3442 errx (1, "unknown host %s", str); 3443 3444 memcpy (addr, hp->h_addr, sizeof (struct in_addr)); 3445} 3446 3447static int 3448StrToPortRange (const char* str, const char* proto, port_range *portRange) 3449{ 3450 char* sep; 3451 struct servent* sp; 3452 char* end; 3453 u_short loPort; 3454 u_short hiPort; 3455 3456 /* First see if this is a service, return corresponding port if so. */ 3457 sp = getservbyname (str,proto); 3458 if (sp) { 3459 SETLOPORT(*portRange, ntohs(sp->s_port)); 3460 SETNUMPORTS(*portRange, 1); 3461 return 0; 3462 } 3463 3464 /* Not a service, see if it's a single port or port range. */ 3465 sep = strchr (str, '-'); 3466 if (sep == NULL) { 3467 SETLOPORT(*portRange, strtol(str, &end, 10)); 3468 if (end != str) { 3469 /* Single port. */ 3470 SETNUMPORTS(*portRange, 1); 3471 return 0; 3472 } 3473 3474 /* Error in port range field. */ 3475 errx (EX_DATAERR, "%s/%s: unknown service", str, proto); 3476 } 3477 3478 /* Port range, get the values and sanity check. */ 3479 sscanf (str, "%hu-%hu", &loPort, &hiPort); 3480 SETLOPORT(*portRange, loPort); 3481 SETNUMPORTS(*portRange, 0); /* Error by default */ 3482 if (loPort <= hiPort) 3483 SETNUMPORTS(*portRange, hiPort - loPort + 1); 3484 3485 if (GETNUMPORTS(*portRange) == 0) 3486 errx (EX_DATAERR, "invalid port range %s", str); 3487 3488 return 0; 3489} 3490 3491static int 3492StrToProto (const char* str) 3493{ 3494 if (!strcmp (str, "tcp")) 3495 return IPPROTO_TCP; 3496 3497 if (!strcmp (str, "udp")) 3498 return IPPROTO_UDP; 3499 3500 errx (EX_DATAERR, "unknown protocol %s. Expected tcp or udp", str); 3501} 3502 3503static int 3504StrToAddrAndPortRange (const char* str, struct in_addr* addr, char* proto, 3505 port_range *portRange) 3506{ 3507 char* ptr; 3508 3509 ptr = strchr (str, ':'); 3510 if (!ptr) 3511 errx (EX_DATAERR, "%s is missing port number", str); 3512 3513 *ptr = '\0'; 3514 ++ptr; 3515 3516 StrToAddr (str, addr); 3517 return StrToPortRange (ptr, proto, portRange); 3518} 3519 3520/* End of stuff taken from natd.c. */ 3521 3522#define INC_ARGCV() do { \ 3523 (*_av)++; \ 3524 (*_ac)--; \ 3525 av = *_av; \ 3526 ac = *_ac; \ 3527} while(0) 3528 3529/* 3530 * The next 3 functions add support for the addr, port and proto redirect and 3531 * their logic is loosely based on SetupAddressRedirect(), SetupPortRedirect() 3532 * and SetupProtoRedirect() from natd.c. 3533 * 3534 * Every setup_* function fills at least one redirect entry 3535 * (struct cfg_redir) and zero or more server pool entry (struct cfg_spool) 3536 * in buf. 3537 * 3538 * The format of data in buf is: 3539 * 3540 * 3541 * cfg_nat cfg_redir cfg_spool ...... cfg_spool 3542 * 3543 * ------------------------------------- ------------ 3544 * | | .....X ... | | | | ..... 3545 * ------------------------------------- ...... ------------ 3546 * ^ 3547 * spool_cnt n=0 ...... n=(X-1) 3548 * 3549 * len points to the amount of available space in buf 3550 * space counts the memory consumed by every function 3551 * 3552 * XXX - Every function get all the argv params so it 3553 * has to check, in optional parameters, that the next 3554 * args is a valid option for the redir entry and not 3555 * another token. Only redir_port and redir_proto are 3556 * affected by this. 3557 */ 3558 3559static int 3560setup_redir_addr(char *spool_buf, int len, 3561 int *_ac, char ***_av) 3562{ 3563 char **av, *sep; /* Token separator. */ 3564 /* Temporary buffer used to hold server pool ip's. */ 3565 char tmp_spool_buf[NAT_BUF_LEN]; 3566 int ac, space, lsnat; 3567 struct cfg_redir *r; 3568 struct cfg_spool *tmp; 3569 3570 av = *_av; 3571 ac = *_ac; 3572 space = 0; 3573 lsnat = 0; 3574 if (len >= SOF_REDIR) { 3575 r = (struct cfg_redir *)spool_buf; 3576 /* Skip cfg_redir at beginning of buf. */ 3577 spool_buf = &spool_buf[SOF_REDIR]; 3578 space = SOF_REDIR; 3579 len -= SOF_REDIR; 3580 } else 3581 goto nospace; 3582 r->mode = REDIR_ADDR; 3583 /* Extract local address. */ 3584 if (ac == 0) 3585 errx(EX_DATAERR, "redirect_addr: missing local address"); 3586 sep = strchr(*av, ','); 3587 if (sep) { /* LSNAT redirection syntax. */ 3588 r->laddr.s_addr = INADDR_NONE; 3589 /* Preserve av, copy spool servers to tmp_spool_buf. */ 3590 strncpy(tmp_spool_buf, *av, strlen(*av)+1); 3591 lsnat = 1; 3592 } else 3593 StrToAddr(*av, &r->laddr); 3594 INC_ARGCV(); 3595 3596 /* Extract public address. */ 3597 if (ac == 0) 3598 errx(EX_DATAERR, "redirect_addr: missing public address"); 3599 StrToAddr(*av, &r->paddr); 3600 INC_ARGCV(); 3601 3602 /* Setup LSNAT server pool. */ 3603 if (sep) { 3604 sep = strtok(tmp_spool_buf, ","); 3605 while (sep != NULL) { 3606 tmp = (struct cfg_spool *)spool_buf; 3607 if (len < SOF_SPOOL) 3608 goto nospace; 3609 len -= SOF_SPOOL; 3610 space += SOF_SPOOL; 3611 StrToAddr(sep, &tmp->addr); 3612 tmp->port = ~0; 3613 r->spool_cnt++; 3614 /* Point to the next possible cfg_spool. */ 3615 spool_buf = &spool_buf[SOF_SPOOL]; 3616 sep = strtok(NULL, ","); 3617 } 3618 } 3619 return(space); 3620nospace: 3621 errx(EX_DATAERR, "redirect_addr: buf is too small\n"); 3622} 3623 3624static int 3625setup_redir_port(char *spool_buf, int len, 3626 int *_ac, char ***_av) 3627{ 3628 char **av, *sep, *protoName; 3629 char tmp_spool_buf[NAT_BUF_LEN]; 3630 int ac, space, lsnat; 3631 struct cfg_redir *r; 3632 struct cfg_spool *tmp; 3633 u_short numLocalPorts; 3634 port_range portRange; 3635 3636 av = *_av; 3637 ac = *_ac; 3638 space = 0; 3639 lsnat = 0; 3640 numLocalPorts = 0; 3641 3642 if (len >= SOF_REDIR) { 3643 r = (struct cfg_redir *)spool_buf; 3644 /* Skip cfg_redir at beginning of buf. */ 3645 spool_buf = &spool_buf[SOF_REDIR]; 3646 space = SOF_REDIR; 3647 len -= SOF_REDIR; 3648 } else 3649 goto nospace; 3650 r->mode = REDIR_PORT; 3651 /* 3652 * Extract protocol. 3653 */ 3654 if (ac == 0) 3655 errx (EX_DATAERR, "redirect_port: missing protocol"); 3656 r->proto = StrToProto(*av); 3657 protoName = *av; 3658 INC_ARGCV(); 3659 3660 /* 3661 * Extract local address. 3662 */ 3663 if (ac == 0) 3664 errx (EX_DATAERR, "redirect_port: missing local address"); 3665 3666 sep = strchr(*av, ','); 3667 /* LSNAT redirection syntax. */ 3668 if (sep) { 3669 r->laddr.s_addr = INADDR_NONE; 3670 r->lport = ~0; 3671 numLocalPorts = 1; 3672 /* Preserve av, copy spool servers to tmp_spool_buf. */ 3673 strncpy(tmp_spool_buf, *av, strlen(*av)+1); 3674 lsnat = 1; 3675 } else { 3676 if (StrToAddrAndPortRange (*av, &r->laddr, protoName, 3677 &portRange) != 0) 3678 errx(EX_DATAERR, "redirect_port:" 3679 "invalid local port range"); 3680 3681 r->lport = GETLOPORT(portRange); 3682 numLocalPorts = GETNUMPORTS(portRange); 3683 } 3684 INC_ARGCV(); 3685 3686 /* 3687 * Extract public port and optionally address. 3688 */ 3689 if (ac == 0) 3690 errx (EX_DATAERR, "redirect_port: missing public port"); 3691 3692 sep = strchr (*av, ':'); 3693 if (sep) { 3694 if (StrToAddrAndPortRange (*av, &r->paddr, protoName, 3695 &portRange) != 0) 3696 errx(EX_DATAERR, "redirect_port:" 3697 "invalid public port range"); 3698 } else { 3699 r->paddr.s_addr = INADDR_ANY; 3700 if (StrToPortRange (*av, protoName, &portRange) != 0) 3701 errx(EX_DATAERR, "redirect_port:" 3702 "invalid public port range"); 3703 } 3704 3705 r->pport = GETLOPORT(portRange); 3706 r->pport_cnt = GETNUMPORTS(portRange); 3707 INC_ARGCV(); 3708 3709 /* 3710 * Extract remote address and optionally port. 3711 */ 3712 /* 3713 * NB: isalpha(**av) => we've to check that next parameter is really an 3714 * option for this redirect entry, else stop here processing arg[cv]. 3715 */ 3716 if (ac != 0 && !isalpha(**av)) { 3717 sep = strchr (*av, ':'); 3718 if (sep) { 3719 if (StrToAddrAndPortRange (*av, &r->raddr, protoName, 3720 &portRange) != 0) 3721 errx(EX_DATAERR, "redirect_port:" 3722 "invalid remote port range"); 3723 } else { 3724 SETLOPORT(portRange, 0); 3725 SETNUMPORTS(portRange, 1); 3726 StrToAddr (*av, &r->raddr); 3727 } 3728 INC_ARGCV(); 3729 } else { 3730 SETLOPORT(portRange, 0); 3731 SETNUMPORTS(portRange, 1); 3732 r->raddr.s_addr = INADDR_ANY; 3733 } 3734 r->rport = GETLOPORT(portRange); 3735 r->rport_cnt = GETNUMPORTS(portRange); 3736 3737 /* 3738 * Make sure port ranges match up, then add the redirect ports. 3739 */ 3740 if (numLocalPorts != r->pport_cnt) 3741 errx(EX_DATAERR, "redirect_port:" 3742 "port ranges must be equal in size"); 3743 3744 /* Remote port range is allowed to be '0' which means all ports. */ 3745 if (r->rport_cnt != numLocalPorts && 3746 (r->rport_cnt != 1 || r->rport != 0)) 3747 errx(EX_DATAERR, "redirect_port: remote port must" 3748 "be 0 or equal to local port range in size"); 3749 3750 /* 3751 * Setup LSNAT server pool. 3752 */ 3753 if (lsnat) { 3754 sep = strtok(tmp_spool_buf, ","); 3755 while (sep != NULL) { 3756 tmp = (struct cfg_spool *)spool_buf; 3757 if (len < SOF_SPOOL) 3758 goto nospace; 3759 len -= SOF_SPOOL; 3760 space += SOF_SPOOL; 3761 if (StrToAddrAndPortRange(sep, &tmp->addr, protoName, 3762 &portRange) != 0) 3763 errx(EX_DATAERR, "redirect_port:" 3764 "invalid local port range"); 3765 if (GETNUMPORTS(portRange) != 1) 3766 errx(EX_DATAERR, "redirect_port: local port" 3767 "must be single in this context"); 3768 tmp->port = GETLOPORT(portRange); 3769 r->spool_cnt++; 3770 /* Point to the next possible cfg_spool. */ 3771 spool_buf = &spool_buf[SOF_SPOOL]; 3772 sep = strtok(NULL, ","); 3773 } 3774 } 3775 return (space); 3776nospace: 3777 errx(EX_DATAERR, "redirect_port: buf is too small\n"); 3778} 3779 3780static int 3781setup_redir_proto(char *spool_buf, int len, 3782 int *_ac, char ***_av) 3783{ 3784 char **av; 3785 int ac, space; 3786 struct protoent *protoent; 3787 struct cfg_redir *r; 3788 3789 av = *_av; 3790 ac = *_ac; 3791 if (len >= SOF_REDIR) { 3792 r = (struct cfg_redir *)spool_buf; 3793 /* Skip cfg_redir at beginning of buf. */ 3794 spool_buf = &spool_buf[SOF_REDIR]; 3795 space = SOF_REDIR; 3796 len -= SOF_REDIR; 3797 } else 3798 goto nospace; 3799 r->mode = REDIR_PROTO; 3800 /* 3801 * Extract protocol. 3802 */ 3803 if (ac == 0) 3804 errx(EX_DATAERR, "redirect_proto: missing protocol"); 3805 3806 protoent = getprotobyname(*av); 3807 if (protoent == NULL) 3808 errx(EX_DATAERR, "redirect_proto: unknown protocol %s", *av); 3809 else 3810 r->proto = protoent->p_proto; 3811 3812 INC_ARGCV(); 3813 3814 /* 3815 * Extract local address. 3816 */ 3817 if (ac == 0) 3818 errx(EX_DATAERR, "redirect_proto: missing local address"); 3819 else 3820 StrToAddr(*av, &r->laddr); 3821 3822 INC_ARGCV(); 3823 3824 /* 3825 * Extract optional public address. 3826 */ 3827 if (ac == 0) { 3828 r->paddr.s_addr = INADDR_ANY; 3829 r->raddr.s_addr = INADDR_ANY; 3830 } else { 3831 /* see above in setup_redir_port() */ 3832 if (!isalpha(**av)) { 3833 StrToAddr(*av, &r->paddr); 3834 INC_ARGCV(); 3835 3836 /* 3837 * Extract optional remote address. 3838 */ 3839 /* see above in setup_redir_port() */ 3840 if (ac!=0 && !isalpha(**av)) { 3841 StrToAddr(*av, &r->raddr); 3842 INC_ARGCV(); 3843 } 3844 } 3845 } 3846 return (space); 3847nospace: 3848 errx(EX_DATAERR, "redirect_proto: buf is too small\n"); 3849} 3850 3851static void 3852show_nat(int ac, char **av); 3853 3854static void 3855print_nat_config(unsigned char *buf) 3856{ 3857 struct cfg_nat *n; 3858 int i, cnt, flag, off; 3859 struct cfg_redir *t; 3860 struct cfg_spool *s; 3861 struct protoent *p; 3862 3863 n = (struct cfg_nat *)buf; 3864 flag = 1; 3865 off = sizeof(*n); 3866 printf("ipfw nat %u config", n->id); 3867 if (strlen(n->if_name) != 0) 3868 printf(" if %s", n->if_name); 3869 else if (n->ip.s_addr != 0) 3870 printf(" ip %s", inet_ntoa(n->ip)); 3871 while (n->mode != 0) { 3872 if (n->mode & PKT_ALIAS_LOG) { 3873 printf(" log"); 3874 n->mode &= ~PKT_ALIAS_LOG; 3875 } else if (n->mode & PKT_ALIAS_DENY_INCOMING) { 3876 printf(" deny_in"); 3877 n->mode &= ~PKT_ALIAS_DENY_INCOMING; 3878 } else if (n->mode & PKT_ALIAS_SAME_PORTS) { 3879 printf(" same_ports"); 3880 n->mode &= ~PKT_ALIAS_SAME_PORTS; 3881 } else if (n->mode & PKT_ALIAS_UNREGISTERED_ONLY) { 3882 printf(" unreg_only"); 3883 n->mode &= ~PKT_ALIAS_UNREGISTERED_ONLY; 3884 } else if (n->mode & PKT_ALIAS_RESET_ON_ADDR_CHANGE) { 3885 printf(" reset"); 3886 n->mode &= ~PKT_ALIAS_RESET_ON_ADDR_CHANGE; 3887 } else if (n->mode & PKT_ALIAS_REVERSE) { 3888 printf(" reverse"); 3889 n->mode &= ~PKT_ALIAS_REVERSE; 3890 } else if (n->mode & PKT_ALIAS_PROXY_ONLY) { 3891 printf(" proxy_only"); 3892 n->mode &= ~PKT_ALIAS_PROXY_ONLY; 3893 } 3894 } 3895 /* Print all the redirect's data configuration. */ 3896 for (cnt = 0; cnt < n->redir_cnt; cnt++) { 3897 t = (struct cfg_redir *)&buf[off]; 3898 off += SOF_REDIR; 3899 switch (t->mode) { 3900 case REDIR_ADDR: 3901 printf(" redirect_addr"); 3902 if (t->spool_cnt == 0) 3903 printf(" %s", inet_ntoa(t->laddr)); 3904 else 3905 for (i = 0; i < t->spool_cnt; i++) { 3906 s = (struct cfg_spool *)&buf[off]; 3907 if (i) 3908 printf(","); 3909 else 3910 printf(" "); 3911 printf("%s", inet_ntoa(s->addr)); 3912 off += SOF_SPOOL; 3913 } 3914 printf(" %s", inet_ntoa(t->paddr)); 3915 break; 3916 case REDIR_PORT: 3917 p = getprotobynumber(t->proto); 3918 printf(" redirect_port %s ", p->p_name); 3919 if (!t->spool_cnt) { 3920 printf("%s:%u", inet_ntoa(t->laddr), t->lport); 3921 if (t->pport_cnt > 1) 3922 printf("-%u", t->lport + 3923 t->pport_cnt - 1); 3924 } else 3925 for (i=0; i < t->spool_cnt; i++) { 3926 s = (struct cfg_spool *)&buf[off]; 3927 if (i) 3928 printf(","); 3929 printf("%s:%u", inet_ntoa(s->addr), 3930 s->port); 3931 off += SOF_SPOOL; 3932 } 3933 3934 printf(" "); 3935 if (t->paddr.s_addr) 3936 printf("%s:", inet_ntoa(t->paddr)); 3937 printf("%u", t->pport); 3938 if (!t->spool_cnt && t->pport_cnt > 1) 3939 printf("-%u", t->pport + t->pport_cnt - 1); 3940 3941 if (t->raddr.s_addr) { 3942 printf(" %s", inet_ntoa(t->raddr)); 3943 if (t->rport) { 3944 printf(":%u", t->rport); 3945 if (!t->spool_cnt && t->rport_cnt > 1) 3946 printf("-%u", t->rport + 3947 t->rport_cnt - 1); 3948 } 3949 } 3950 break; 3951 case REDIR_PROTO: 3952 p = getprotobynumber(t->proto); 3953 printf(" redirect_proto %s %s", p->p_name, 3954 inet_ntoa(t->laddr)); 3955 if (t->paddr.s_addr != 0) { 3956 printf(" %s", inet_ntoa(t->paddr)); 3957 if (t->raddr.s_addr) 3958 printf(" %s", inet_ntoa(t->raddr)); 3959 } 3960 break; 3961 default: 3962 errx(EX_DATAERR, "unknown redir mode"); 3963 break; 3964 } 3965 } 3966 printf("\n"); 3967} 3968 3969static void 3970config_nat(int ac, char **av) 3971{ 3972 struct cfg_nat *n; /* Nat instance configuration. */ 3973 int i, len, off, tok; 3974 char *id, buf[NAT_BUF_LEN]; /* Buffer for serialized data. */ 3975 3976 len = NAT_BUF_LEN; 3977 /* Offset in buf: save space for n at the beginning. */ 3978 off = sizeof(*n); 3979 memset(buf, 0, sizeof(buf)); 3980 n = (struct cfg_nat *)buf; 3981 3982 av++; ac--; 3983 /* Nat id. */ 3984 if (ac && isdigit(**av)) { 3985 id = *av; 3986 i = atoi(*av); 3987 ac--; av++; 3988 n->id = i; 3989 } else 3990 errx(EX_DATAERR, "missing nat id"); 3991 if (ac == 0) 3992 errx(EX_DATAERR, "missing option"); 3993 3994 while (ac > 0) { 3995 tok = match_token(nat_params, *av); 3996 ac--; av++; 3997 switch (tok) { 3998 case TOK_IP: 3999 if (ac == 0) 4000 errx(EX_DATAERR, "missing option"); 4001 if (!inet_aton(av[0], &(n->ip))) 4002 errx(EX_DATAERR, "bad ip address ``%s''", 4003 av[0]); 4004 ac--; av++; 4005 break; 4006 case TOK_IF: 4007 if (ac == 0) 4008 errx(EX_DATAERR, "missing option"); 4009 set_addr_dynamic(av[0], n); 4010 ac--; av++; 4011 break; 4012 case TOK_ALOG: 4013 n->mode |= PKT_ALIAS_LOG; 4014 break; 4015 case TOK_DENY_INC: 4016 n->mode |= PKT_ALIAS_DENY_INCOMING; 4017 break; 4018 case TOK_SAME_PORTS: 4019 n->mode |= PKT_ALIAS_SAME_PORTS; 4020 break; 4021 case TOK_UNREG_ONLY: 4022 n->mode |= PKT_ALIAS_UNREGISTERED_ONLY; 4023 break; 4024 case TOK_RESET_ADDR: 4025 n->mode |= PKT_ALIAS_RESET_ON_ADDR_CHANGE; 4026 break; 4027 case TOK_ALIAS_REV: 4028 n->mode |= PKT_ALIAS_REVERSE; 4029 break; 4030 case TOK_PROXY_ONLY: 4031 n->mode |= PKT_ALIAS_PROXY_ONLY; 4032 break; 4033 /* 4034 * All the setup_redir_* functions work directly in the final 4035 * buffer, see above for details. 4036 */ 4037 case TOK_REDIR_ADDR: 4038 case TOK_REDIR_PORT: 4039 case TOK_REDIR_PROTO: 4040 switch (tok) { 4041 case TOK_REDIR_ADDR: 4042 i = setup_redir_addr(&buf[off], len, &ac, &av); 4043 break; 4044 case TOK_REDIR_PORT: 4045 i = setup_redir_port(&buf[off], len, &ac, &av); 4046 break; 4047 case TOK_REDIR_PROTO: 4048 i = setup_redir_proto(&buf[off], len, &ac, &av); 4049 break; 4050 } 4051 n->redir_cnt++; 4052 off += i; 4053 len -= i; 4054 break; 4055 default: 4056 errx(EX_DATAERR, "unrecognised option ``%s''", av[-1]); 4057 } 4058 } 4059 4060 i = do_cmd(IP_FW_NAT_CFG, buf, off); 4061 if (i) 4062 err(1, "setsockopt(%s)", "IP_FW_NAT_CFG"); 4063 4064 if (!do_quiet) { 4065 /* After every modification, we show the resultant rule. */ 4066 int _ac = 3; 4067 char *_av[] = {"show", "config", id}; 4068 show_nat(_ac, _av); 4069 } 4070} 4071 4072static void 4073config_pipe(int ac, char **av) 4074{ 4075 struct dn_pipe p; 4076 int i; 4077 char *end; 4078 void *par = NULL; 4079 4080 memset(&p, 0, sizeof p); 4081 4082 av++; ac--; 4083 /* Pipe number */ 4084 if (ac && isdigit(**av)) { 4085 i = atoi(*av); av++; ac--; 4086 if (do_pipe == 1) 4087 p.pipe_nr = i; 4088 else 4089 p.fs.fs_nr = i; 4090 } 4091 while (ac > 0) { 4092 double d; 4093 int tok = match_token(dummynet_params, *av); 4094 ac--; av++; 4095 4096 switch(tok) { 4097 case TOK_NOERROR: 4098 p.fs.flags_fs |= DN_NOERROR; 4099 break; 4100 4101 case TOK_PLR: 4102 NEED1("plr needs argument 0..1\n"); 4103 d = strtod(av[0], NULL); 4104 if (d > 1) 4105 d = 1; 4106 else if (d < 0) 4107 d = 0; 4108 p.fs.plr = (int)(d*0x7fffffff); 4109 ac--; av++; 4110 break; 4111 4112 case TOK_QUEUE: 4113 NEED1("queue needs queue size\n"); 4114 end = NULL; 4115 p.fs.qsize = strtoul(av[0], &end, 0); 4116 if (*end == 'K' || *end == 'k') { 4117 p.fs.flags_fs |= DN_QSIZE_IS_BYTES; 4118 p.fs.qsize *= 1024; 4119 } else if (*end == 'B' || 4120 _substrcmp2(end, "by", "bytes") == 0) { 4121 p.fs.flags_fs |= DN_QSIZE_IS_BYTES; 4122 } 4123 ac--; av++; 4124 break; 4125 4126 case TOK_BUCKETS: 4127 NEED1("buckets needs argument\n"); 4128 p.fs.rq_size = strtoul(av[0], NULL, 0); 4129 ac--; av++; 4130 break; 4131 4132 case TOK_MASK: 4133 NEED1("mask needs mask specifier\n"); 4134 /* 4135 * per-flow queue, mask is dst_ip, dst_port, 4136 * src_ip, src_port, proto measured in bits 4137 */ 4138 par = NULL; 4139 4140 bzero(&p.fs.flow_mask, sizeof(p.fs.flow_mask)); 4141 end = NULL; 4142 4143 while (ac >= 1) { 4144 uint32_t *p32 = NULL; 4145 uint16_t *p16 = NULL; 4146 uint32_t *p20 = NULL; 4147 struct in6_addr *pa6 = NULL; 4148 uint32_t a; 4149 4150 tok = match_token(dummynet_params, *av); 4151 ac--; av++; 4152 switch(tok) { 4153 case TOK_ALL: 4154 /* 4155 * special case, all bits significant 4156 */ 4157 p.fs.flow_mask.dst_ip = ~0; 4158 p.fs.flow_mask.src_ip = ~0; 4159 p.fs.flow_mask.dst_port = ~0; 4160 p.fs.flow_mask.src_port = ~0; 4161 p.fs.flow_mask.proto = ~0; 4162 n2mask(&(p.fs.flow_mask.dst_ip6), 128); 4163 n2mask(&(p.fs.flow_mask.src_ip6), 128); 4164 p.fs.flow_mask.flow_id6 = ~0; 4165 p.fs.flags_fs |= DN_HAVE_FLOW_MASK; 4166 goto end_mask; 4167 4168 case TOK_DSTIP: 4169 p32 = &p.fs.flow_mask.dst_ip; 4170 break; 4171 4172 case TOK_SRCIP: 4173 p32 = &p.fs.flow_mask.src_ip; 4174 break; 4175 4176 case TOK_DSTIP6: 4177 pa6 = &(p.fs.flow_mask.dst_ip6); 4178 break; 4179 4180 case TOK_SRCIP6: 4181 pa6 = &(p.fs.flow_mask.src_ip6); 4182 break; 4183 4184 case TOK_FLOWID: 4185 p20 = &p.fs.flow_mask.flow_id6; 4186 break; 4187 4188 case TOK_DSTPORT: 4189 p16 = &p.fs.flow_mask.dst_port; 4190 break; 4191 4192 case TOK_SRCPORT: 4193 p16 = &p.fs.flow_mask.src_port; 4194 break; 4195 4196 case TOK_PROTO: 4197 break; 4198 4199 default: 4200 ac++; av--; /* backtrack */ 4201 goto end_mask; 4202 } 4203 if (ac < 1) 4204 errx(EX_USAGE, "mask: value missing"); 4205 if (*av[0] == '/') { 4206 a = strtoul(av[0]+1, &end, 0); 4207 if (pa6 == NULL) 4208 a = (a == 32) ? ~0 : (1 << a) - 1; 4209 } else 4210 a = strtoul(av[0], &end, 0); 4211 if (p32 != NULL) 4212 *p32 = a; 4213 else if (p16 != NULL) { 4214 if (a > 0xFFFF) 4215 errx(EX_DATAERR, 4216 "port mask must be 16 bit"); 4217 *p16 = (uint16_t)a; 4218 } else if (p20 != NULL) { 4219 if (a > 0xfffff) 4220 errx(EX_DATAERR, 4221 "flow_id mask must be 20 bit"); 4222 *p20 = (uint32_t)a; 4223 } else if (pa6 != NULL) { 4224 if (a > 128) 4225 errx(EX_DATAERR, 4226 "in6addr invalid mask len"); 4227 else 4228 n2mask(pa6, a); 4229 } else { 4230 if (a > 0xFF) 4231 errx(EX_DATAERR, 4232 "proto mask must be 8 bit"); 4233 p.fs.flow_mask.proto = (uint8_t)a; 4234 } 4235 if (a != 0) 4236 p.fs.flags_fs |= DN_HAVE_FLOW_MASK; 4237 ac--; av++; 4238 } /* end while, config masks */ 4239end_mask: 4240 break; 4241 4242 case TOK_RED: 4243 case TOK_GRED: 4244 NEED1("red/gred needs w_q/min_th/max_th/max_p\n"); 4245 p.fs.flags_fs |= DN_IS_RED; 4246 if (tok == TOK_GRED) 4247 p.fs.flags_fs |= DN_IS_GENTLE_RED; 4248 /* 4249 * the format for parameters is w_q/min_th/max_th/max_p 4250 */ 4251 if ((end = strsep(&av[0], "/"))) { 4252 double w_q = strtod(end, NULL); 4253 if (w_q > 1 || w_q <= 0) 4254 errx(EX_DATAERR, "0 < w_q <= 1"); 4255 p.fs.w_q = (int) (w_q * (1 << SCALE_RED)); 4256 } 4257 if ((end = strsep(&av[0], "/"))) { 4258 p.fs.min_th = strtoul(end, &end, 0); 4259 if (*end == 'K' || *end == 'k') 4260 p.fs.min_th *= 1024; 4261 } 4262 if ((end = strsep(&av[0], "/"))) { 4263 p.fs.max_th = strtoul(end, &end, 0); 4264 if (*end == 'K' || *end == 'k') 4265 p.fs.max_th *= 1024; 4266 } 4267 if ((end = strsep(&av[0], "/"))) { 4268 double max_p = strtod(end, NULL); 4269 if (max_p > 1 || max_p <= 0) 4270 errx(EX_DATAERR, "0 < max_p <= 1"); 4271 p.fs.max_p = (int)(max_p * (1 << SCALE_RED)); 4272 } 4273 ac--; av++; 4274 break; 4275 4276 case TOK_DROPTAIL: 4277 p.fs.flags_fs &= ~(DN_IS_RED|DN_IS_GENTLE_RED); 4278 break; 4279 4280 case TOK_BW: 4281 NEED1("bw needs bandwidth or interface\n"); 4282 if (do_pipe != 1) 4283 errx(EX_DATAERR, "bandwidth only valid for pipes"); 4284 /* 4285 * set clocking interface or bandwidth value 4286 */ 4287 if (av[0][0] >= 'a' && av[0][0] <= 'z') { 4288 int l = sizeof(p.if_name)-1; 4289 /* interface name */ 4290 strncpy(p.if_name, av[0], l); 4291 p.if_name[l] = '\0'; 4292 p.bandwidth = 0; 4293 } else { 4294 p.if_name[0] = '\0'; 4295 p.bandwidth = strtoul(av[0], &end, 0); 4296 if (*end == 'K' || *end == 'k') { 4297 end++; 4298 p.bandwidth *= 1000; 4299 } else if (*end == 'M') { 4300 end++; 4301 p.bandwidth *= 1000000; 4302 } 4303 if ((*end == 'B' && 4304 _substrcmp2(end, "Bi", "Bit/s") != 0) || 4305 _substrcmp2(end, "by", "bytes") == 0) 4306 p.bandwidth *= 8; 4307 if (p.bandwidth < 0) 4308 errx(EX_DATAERR, "bandwidth too large"); 4309 } 4310 ac--; av++; 4311 break; 4312 4313 case TOK_DELAY: 4314 if (do_pipe != 1) 4315 errx(EX_DATAERR, "delay only valid for pipes"); 4316 NEED1("delay needs argument 0..10000ms\n"); 4317 p.delay = strtoul(av[0], NULL, 0); 4318 ac--; av++; 4319 break; 4320 4321 case TOK_WEIGHT: 4322 if (do_pipe == 1) 4323 errx(EX_DATAERR,"weight only valid for queues"); 4324 NEED1("weight needs argument 0..100\n"); 4325 p.fs.weight = strtoul(av[0], &end, 0); 4326 ac--; av++; 4327 break; 4328 4329 case TOK_PIPE: 4330 if (do_pipe == 1) 4331 errx(EX_DATAERR,"pipe only valid for queues"); 4332 NEED1("pipe needs pipe_number\n"); 4333 p.fs.parent_nr = strtoul(av[0], &end, 0); 4334 ac--; av++; 4335 break; 4336 4337 default: 4338 errx(EX_DATAERR, "unrecognised option ``%s''", av[-1]); 4339 } 4340 } 4341 if (do_pipe == 1) { 4342 if (p.pipe_nr == 0) 4343 errx(EX_DATAERR, "pipe_nr must be > 0"); 4344 if (p.delay > 10000) 4345 errx(EX_DATAERR, "delay must be < 10000"); 4346 } else { /* do_pipe == 2, queue */ 4347 if (p.fs.parent_nr == 0) 4348 errx(EX_DATAERR, "pipe must be > 0"); 4349 if (p.fs.weight >100) 4350 errx(EX_DATAERR, "weight must be <= 100"); 4351 } 4352 if (p.fs.flags_fs & DN_QSIZE_IS_BYTES) { 4353 size_t len; 4354 long limit; 4355 4356 len = sizeof(limit); 4357 if (sysctlbyname("net.inet.ip.dummynet.pipe_byte_limit", 4358 &limit, &len, NULL, 0) == -1) 4359 limit = 1024*1024; 4360 if (p.fs.qsize > limit) 4361 errx(EX_DATAERR, "queue size must be < %ldB", limit); 4362 } else { 4363 size_t len; 4364 long limit; 4365 4366 len = sizeof(limit); 4367 if (sysctlbyname("net.inet.ip.dummynet.pipe_slot_limit", 4368 &limit, &len, NULL, 0) == -1) 4369 limit = 100; 4370 if (p.fs.qsize > limit) 4371 errx(EX_DATAERR, "2 <= queue size <= %ld", limit); 4372 } 4373 if (p.fs.flags_fs & DN_IS_RED) { 4374 size_t len; 4375 int lookup_depth, avg_pkt_size; 4376 double s, idle, weight, w_q; 4377 struct clockinfo ck; 4378 int t; 4379 4380 if (p.fs.min_th >= p.fs.max_th) 4381 errx(EX_DATAERR, "min_th %d must be < than max_th %d", 4382 p.fs.min_th, p.fs.max_th); 4383 if (p.fs.max_th == 0) 4384 errx(EX_DATAERR, "max_th must be > 0"); 4385 4386 len = sizeof(int); 4387 if (sysctlbyname("net.inet.ip.dummynet.red_lookup_depth", 4388 &lookup_depth, &len, NULL, 0) == -1) 4389 errx(1, "sysctlbyname(\"%s\")", 4390 "net.inet.ip.dummynet.red_lookup_depth"); 4391 if (lookup_depth == 0) 4392 errx(EX_DATAERR, "net.inet.ip.dummynet.red_lookup_depth" 4393 " must be greater than zero"); 4394 4395 len = sizeof(int); 4396 if (sysctlbyname("net.inet.ip.dummynet.red_avg_pkt_size", 4397 &avg_pkt_size, &len, NULL, 0) == -1) 4398 4399 errx(1, "sysctlbyname(\"%s\")", 4400 "net.inet.ip.dummynet.red_avg_pkt_size"); 4401 if (avg_pkt_size == 0) 4402 errx(EX_DATAERR, 4403 "net.inet.ip.dummynet.red_avg_pkt_size must" 4404 " be greater than zero"); 4405 4406 len = sizeof(struct clockinfo); 4407 if (sysctlbyname("kern.clockrate", &ck, &len, NULL, 0) == -1) 4408 errx(1, "sysctlbyname(\"%s\")", "kern.clockrate"); 4409 4410 /* 4411 * Ticks needed for sending a medium-sized packet. 4412 * Unfortunately, when we are configuring a WF2Q+ queue, we 4413 * do not have bandwidth information, because that is stored 4414 * in the parent pipe, and also we have multiple queues 4415 * competing for it. So we set s=0, which is not very 4416 * correct. But on the other hand, why do we want RED with 4417 * WF2Q+ ? 4418 */ 4419 if (p.bandwidth==0) /* this is a WF2Q+ queue */ 4420 s = 0; 4421 else 4422 s = (double)ck.hz * avg_pkt_size * 8 / p.bandwidth; 4423 4424 /* 4425 * max idle time (in ticks) before avg queue size becomes 0. 4426 * NOTA: (3/w_q) is approx the value x so that 4427 * (1-w_q)^x < 10^-3. 4428 */ 4429 w_q = ((double)p.fs.w_q) / (1 << SCALE_RED); 4430 idle = s * 3. / w_q; 4431 p.fs.lookup_step = (int)idle / lookup_depth; 4432 if (!p.fs.lookup_step) 4433 p.fs.lookup_step = 1; 4434 weight = 1 - w_q; 4435 for (t = p.fs.lookup_step; t > 1; --t) 4436 weight *= 1 - w_q; 4437 p.fs.lookup_weight = (int)(weight * (1 << SCALE_RED)); 4438 } 4439 i = do_cmd(IP_DUMMYNET_CONFIGURE, &p, sizeof p); 4440 if (i) 4441 err(1, "setsockopt(%s)", "IP_DUMMYNET_CONFIGURE"); 4442} 4443 4444static void 4445get_mac_addr_mask(const char *p, uint8_t *addr, uint8_t *mask) 4446{ 4447 int i, l; 4448 char *ap, *ptr, *optr; 4449 struct ether_addr *mac; 4450 const char *macset = "0123456789abcdefABCDEF:"; 4451 4452 if (strcmp(p, "any") == 0) { 4453 for (i = 0; i < ETHER_ADDR_LEN; i++) 4454 addr[i] = mask[i] = 0; 4455 return; 4456 } 4457 4458 optr = ptr = strdup(p); 4459 if ((ap = strsep(&ptr, "&/")) != NULL && *ap != 0) { 4460 l = strlen(ap); 4461 if (strspn(ap, macset) != l || (mac = ether_aton(ap)) == NULL) 4462 errx(EX_DATAERR, "Incorrect MAC address"); 4463 bcopy(mac, addr, ETHER_ADDR_LEN); 4464 } else 4465 errx(EX_DATAERR, "Incorrect MAC address"); 4466 4467 if (ptr != NULL) { /* we have mask? */ 4468 if (p[ptr - optr - 1] == '/') { /* mask len */ 4469 l = strtol(ptr, &ap, 10); 4470 if (*ap != 0 || l > ETHER_ADDR_LEN * 8 || l < 0) 4471 errx(EX_DATAERR, "Incorrect mask length"); 4472 for (i = 0; l > 0 && i < ETHER_ADDR_LEN; l -= 8, i++) 4473 mask[i] = (l >= 8) ? 0xff: (~0) << (8 - l); 4474 } else { /* mask */ 4475 l = strlen(ptr); 4476 if (strspn(ptr, macset) != l || 4477 (mac = ether_aton(ptr)) == NULL) 4478 errx(EX_DATAERR, "Incorrect mask"); 4479 bcopy(mac, mask, ETHER_ADDR_LEN); 4480 } 4481 } else { /* default mask: ff:ff:ff:ff:ff:ff */ 4482 for (i = 0; i < ETHER_ADDR_LEN; i++) 4483 mask[i] = 0xff; 4484 } 4485 for (i = 0; i < ETHER_ADDR_LEN; i++) 4486 addr[i] &= mask[i]; 4487 4488 free(optr); 4489} 4490 4491/* 4492 * helper function, updates the pointer to cmd with the length 4493 * of the current command, and also cleans up the first word of 4494 * the new command in case it has been clobbered before. 4495 */ 4496static ipfw_insn * 4497next_cmd(ipfw_insn *cmd) 4498{ 4499 cmd += F_LEN(cmd); 4500 bzero(cmd, sizeof(*cmd)); 4501 return cmd; 4502} 4503 4504/* 4505 * Takes arguments and copies them into a comment 4506 */ 4507static void 4508fill_comment(ipfw_insn *cmd, int ac, char **av) 4509{ 4510 int i, l; 4511 char *p = (char *)(cmd + 1); 4512 4513 cmd->opcode = O_NOP; 4514 cmd->len = (cmd->len & (F_NOT | F_OR)); 4515 4516 /* Compute length of comment string. */ 4517 for (i = 0, l = 0; i < ac; i++) 4518 l += strlen(av[i]) + 1; 4519 if (l == 0) 4520 return; 4521 if (l > 84) 4522 errx(EX_DATAERR, 4523 "comment too long (max 80 chars)"); 4524 l = 1 + (l+3)/4; 4525 cmd->len = (cmd->len & (F_NOT | F_OR)) | l; 4526 for (i = 0; i < ac; i++) { 4527 strcpy(p, av[i]); 4528 p += strlen(av[i]); 4529 *p++ = ' '; 4530 } 4531 *(--p) = '\0'; 4532} 4533 4534/* 4535 * A function to fill simple commands of size 1. 4536 * Existing flags are preserved. 4537 */ 4538static void 4539fill_cmd(ipfw_insn *cmd, enum ipfw_opcodes opcode, int flags, uint16_t arg) 4540{ 4541 cmd->opcode = opcode; 4542 cmd->len = ((cmd->len | flags) & (F_NOT | F_OR)) | 1; 4543 cmd->arg1 = arg; 4544} 4545 4546/* 4547 * Fetch and add the MAC address and type, with masks. This generates one or 4548 * two microinstructions, and returns the pointer to the last one. 4549 */ 4550static ipfw_insn * 4551add_mac(ipfw_insn *cmd, int ac, char *av[]) 4552{ 4553 ipfw_insn_mac *mac; 4554 4555 if (ac < 2) 4556 errx(EX_DATAERR, "MAC dst src"); 4557 4558 cmd->opcode = O_MACADDR2; 4559 cmd->len = (cmd->len & (F_NOT | F_OR)) | F_INSN_SIZE(ipfw_insn_mac); 4560 4561 mac = (ipfw_insn_mac *)cmd; 4562 get_mac_addr_mask(av[0], mac->addr, mac->mask); /* dst */ 4563 get_mac_addr_mask(av[1], &(mac->addr[ETHER_ADDR_LEN]), 4564 &(mac->mask[ETHER_ADDR_LEN])); /* src */ 4565 return cmd; 4566} 4567 4568static ipfw_insn * 4569add_mactype(ipfw_insn *cmd, int ac, char *av) 4570{ 4571 if (ac < 1) 4572 errx(EX_DATAERR, "missing MAC type"); 4573 if (strcmp(av, "any") != 0) { /* we have a non-null type */ 4574 fill_newports((ipfw_insn_u16 *)cmd, av, IPPROTO_ETHERTYPE); 4575 cmd->opcode = O_MAC_TYPE; 4576 return cmd; 4577 } else 4578 return NULL; 4579} 4580 4581static ipfw_insn * 4582add_proto0(ipfw_insn *cmd, char *av, u_char *protop) 4583{ 4584 struct protoent *pe; 4585 char *ep; 4586 int proto; 4587 4588 proto = strtol(av, &ep, 10); 4589 if (*ep != '\0' || proto <= 0) { 4590 if ((pe = getprotobyname(av)) == NULL) 4591 return NULL; 4592 proto = pe->p_proto; 4593 } 4594 4595 fill_cmd(cmd, O_PROTO, 0, proto); 4596 *protop = proto; 4597 return cmd; 4598} 4599 4600static ipfw_insn * 4601add_proto(ipfw_insn *cmd, char *av, u_char *protop) 4602{ 4603 u_char proto = IPPROTO_IP; 4604 4605 if (_substrcmp(av, "all") == 0 || strcmp(av, "ip") == 0) 4606 ; /* do not set O_IP4 nor O_IP6 */ 4607 else if (strcmp(av, "ip4") == 0) 4608 /* explicit "just IPv4" rule */ 4609 fill_cmd(cmd, O_IP4, 0, 0); 4610 else if (strcmp(av, "ip6") == 0) { 4611 /* explicit "just IPv6" rule */ 4612 proto = IPPROTO_IPV6; 4613 fill_cmd(cmd, O_IP6, 0, 0); 4614 } else 4615 return add_proto0(cmd, av, protop); 4616 4617 *protop = proto; 4618 return cmd; 4619} 4620 4621static ipfw_insn * 4622add_proto_compat(ipfw_insn *cmd, char *av, u_char *protop) 4623{ 4624 u_char proto = IPPROTO_IP; 4625 4626 if (_substrcmp(av, "all") == 0 || strcmp(av, "ip") == 0) 4627 ; /* do not set O_IP4 nor O_IP6 */ 4628 else if (strcmp(av, "ipv4") == 0 || strcmp(av, "ip4") == 0) 4629 /* explicit "just IPv4" rule */ 4630 fill_cmd(cmd, O_IP4, 0, 0); 4631 else if (strcmp(av, "ipv6") == 0 || strcmp(av, "ip6") == 0) { 4632 /* explicit "just IPv6" rule */ 4633 proto = IPPROTO_IPV6; 4634 fill_cmd(cmd, O_IP6, 0, 0); 4635 } else 4636 return add_proto0(cmd, av, protop); 4637 4638 *protop = proto; 4639 return cmd; 4640} 4641 4642static ipfw_insn * 4643add_srcip(ipfw_insn *cmd, char *av) 4644{ 4645 fill_ip((ipfw_insn_ip *)cmd, av); 4646 if (cmd->opcode == O_IP_DST_SET) /* set */ 4647 cmd->opcode = O_IP_SRC_SET; 4648 else if (cmd->opcode == O_IP_DST_LOOKUP) /* table */ 4649 cmd->opcode = O_IP_SRC_LOOKUP; 4650 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn)) /* me */ 4651 cmd->opcode = O_IP_SRC_ME; 4652 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_u32)) /* one IP */ 4653 cmd->opcode = O_IP_SRC; 4654 else /* addr/mask */ 4655 cmd->opcode = O_IP_SRC_MASK; 4656 return cmd; 4657} 4658 4659static ipfw_insn * 4660add_dstip(ipfw_insn *cmd, char *av) 4661{ 4662 fill_ip((ipfw_insn_ip *)cmd, av); 4663 if (cmd->opcode == O_IP_DST_SET) /* set */ 4664 ; 4665 else if (cmd->opcode == O_IP_DST_LOOKUP) /* table */ 4666 ; 4667 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn)) /* me */ 4668 cmd->opcode = O_IP_DST_ME; 4669 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_u32)) /* one IP */ 4670 cmd->opcode = O_IP_DST; 4671 else /* addr/mask */ 4672 cmd->opcode = O_IP_DST_MASK; 4673 return cmd; 4674} 4675 4676static ipfw_insn * 4677add_ports(ipfw_insn *cmd, char *av, u_char proto, int opcode) 4678{ 4679 if (_substrcmp(av, "any") == 0) { 4680 return NULL; 4681 } else if (fill_newports((ipfw_insn_u16 *)cmd, av, proto)) { 4682 /* XXX todo: check that we have a protocol with ports */ 4683 cmd->opcode = opcode; 4684 return cmd; 4685 } 4686 return NULL; 4687} 4688 4689static ipfw_insn * 4690add_src(ipfw_insn *cmd, char *av, u_char proto) 4691{ 4692 struct in6_addr a; 4693 char *host, *ch; 4694 ipfw_insn *ret = NULL; 4695 4696 if ((host = strdup(av)) == NULL) 4697 return NULL; 4698 if ((ch = strrchr(host, '/')) != NULL) 4699 *ch = '\0'; 4700 4701 if (proto == IPPROTO_IPV6 || strcmp(av, "me6") == 0 || 4702 inet_pton(AF_INET6, host, &a)) 4703 ret = add_srcip6(cmd, av); 4704 /* XXX: should check for IPv4, not !IPv6 */ 4705 if (ret == NULL && (proto == IPPROTO_IP || strcmp(av, "me") == 0 || 4706 !inet_pton(AF_INET6, host, &a))) 4707 ret = add_srcip(cmd, av); 4708 if (ret == NULL && strcmp(av, "any") != 0) 4709 ret = cmd; 4710 4711 free(host); 4712 return ret; 4713} 4714 4715static ipfw_insn * 4716add_dst(ipfw_insn *cmd, char *av, u_char proto) 4717{ 4718 struct in6_addr a; 4719 char *host, *ch; 4720 ipfw_insn *ret = NULL; 4721 4722 if ((host = strdup(av)) == NULL) 4723 return NULL; 4724 if ((ch = strrchr(host, '/')) != NULL) 4725 *ch = '\0'; 4726 4727 if (proto == IPPROTO_IPV6 || strcmp(av, "me6") == 0 || 4728 inet_pton(AF_INET6, host, &a)) 4729 ret = add_dstip6(cmd, av); 4730 /* XXX: should check for IPv4, not !IPv6 */ 4731 if (ret == NULL && (proto == IPPROTO_IP || strcmp(av, "me") == 0 || 4732 !inet_pton(AF_INET6, host, &a))) 4733 ret = add_dstip(cmd, av); 4734 if (ret == NULL && strcmp(av, "any") != 0) 4735 ret = cmd; 4736 4737 free(host); 4738 return ret; 4739} 4740 4741/* 4742 * Parse arguments and assemble the microinstructions which make up a rule. 4743 * Rules are added into the 'rulebuf' and then copied in the correct order 4744 * into the actual rule. 4745 * 4746 * The syntax for a rule starts with the action, followed by 4747 * optional action parameters, and the various match patterns. 4748 * In the assembled microcode, the first opcode must be an O_PROBE_STATE 4749 * (generated if the rule includes a keep-state option), then the 4750 * various match patterns, log/altq actions, and the actual action. 4751 * 4752 */ 4753static void 4754add(int ac, char *av[]) 4755{ 4756 /* 4757 * rules are added into the 'rulebuf' and then copied in 4758 * the correct order into the actual rule. 4759 * Some things that need to go out of order (prob, action etc.) 4760 * go into actbuf[]. 4761 */ 4762 static uint32_t rulebuf[255], actbuf[255], cmdbuf[255]; 4763 4764 ipfw_insn *src, *dst, *cmd, *action, *prev=NULL; 4765 ipfw_insn *first_cmd; /* first match pattern */ 4766 4767 struct ip_fw *rule; 4768 4769 /* 4770 * various flags used to record that we entered some fields. 4771 */ 4772 ipfw_insn *have_state = NULL; /* check-state or keep-state */ 4773 ipfw_insn *have_log = NULL, *have_altq = NULL, *have_tag = NULL; 4774 size_t len; 4775 4776 int i; 4777 4778 int open_par = 0; /* open parenthesis ( */ 4779 4780 /* proto is here because it is used to fetch ports */ 4781 u_char proto = IPPROTO_IP; /* default protocol */ 4782 4783 double match_prob = 1; /* match probability, default is always match */ 4784 4785 bzero(actbuf, sizeof(actbuf)); /* actions go here */ 4786 bzero(cmdbuf, sizeof(cmdbuf)); 4787 bzero(rulebuf, sizeof(rulebuf)); 4788 4789 rule = (struct ip_fw *)rulebuf; 4790 cmd = (ipfw_insn *)cmdbuf; 4791 action = (ipfw_insn *)actbuf; 4792 4793 av++; ac--; 4794 4795 /* [rule N] -- Rule number optional */ 4796 if (ac && isdigit(**av)) { 4797 rule->rulenum = atoi(*av); 4798 av++; 4799 ac--; 4800 } 4801 4802 /* [set N] -- set number (0..RESVD_SET), optional */ 4803 if (ac > 1 && _substrcmp(*av, "set") == 0) { 4804 int set = strtoul(av[1], NULL, 10); 4805 if (set < 0 || set > RESVD_SET) 4806 errx(EX_DATAERR, "illegal set %s", av[1]); 4807 rule->set = set; 4808 av += 2; ac -= 2; 4809 } 4810 4811 /* [prob D] -- match probability, optional */ 4812 if (ac > 1 && _substrcmp(*av, "prob") == 0) { 4813 match_prob = strtod(av[1], NULL); 4814 4815 if (match_prob <= 0 || match_prob > 1) 4816 errx(EX_DATAERR, "illegal match prob. %s", av[1]); 4817 av += 2; ac -= 2; 4818 } 4819 4820 /* action -- mandatory */ 4821 NEED1("missing action"); 4822 i = match_token(rule_actions, *av); 4823 ac--; av++; 4824 action->len = 1; /* default */ 4825 switch(i) { 4826 case TOK_CHECKSTATE: 4827 have_state = action; 4828 action->opcode = O_CHECK_STATE; 4829 break; 4830 4831 case TOK_ACCEPT: 4832 action->opcode = O_ACCEPT; 4833 break; 4834 4835 case TOK_DENY: 4836 action->opcode = O_DENY; 4837 action->arg1 = 0; 4838 break; 4839 4840 case TOK_REJECT: 4841 action->opcode = O_REJECT; 4842 action->arg1 = ICMP_UNREACH_HOST; 4843 break; 4844 4845 case TOK_RESET: 4846 action->opcode = O_REJECT; 4847 action->arg1 = ICMP_REJECT_RST; 4848 break; 4849 4850 case TOK_RESET6: 4851 action->opcode = O_UNREACH6; 4852 action->arg1 = ICMP6_UNREACH_RST; 4853 break; 4854 4855 case TOK_UNREACH: 4856 action->opcode = O_REJECT; 4857 NEED1("missing reject code"); 4858 fill_reject_code(&action->arg1, *av); 4859 ac--; av++; 4860 break; 4861 4862 case TOK_UNREACH6: 4863 action->opcode = O_UNREACH6; 4864 NEED1("missing unreach code"); 4865 fill_unreach6_code(&action->arg1, *av); 4866 ac--; av++; 4867 break; 4868 4869 case TOK_COUNT: 4870 action->opcode = O_COUNT; 4871 break; 4872 4873 case TOK_NAT: 4874 action->opcode = O_NAT; 4875 action->len = F_INSN_SIZE(ipfw_insn_nat); 4876 goto chkarg; 4877 4878 case TOK_QUEUE: 4879 action->opcode = O_QUEUE; 4880 goto chkarg; 4881 case TOK_PIPE: 4882 action->opcode = O_PIPE; 4883 goto chkarg; 4884 case TOK_SKIPTO: 4885 action->opcode = O_SKIPTO; 4886 goto chkarg; 4887 case TOK_NETGRAPH: 4888 action->opcode = O_NETGRAPH; 4889 goto chkarg; 4890 case TOK_NGTEE: 4891 action->opcode = O_NGTEE; 4892 goto chkarg; 4893 case TOK_DIVERT: 4894 action->opcode = O_DIVERT; 4895 goto chkarg; 4896 case TOK_TEE: 4897 action->opcode = O_TEE; 4898chkarg: 4899 if (!ac) 4900 errx(EX_USAGE, "missing argument for %s", *(av - 1)); 4901 if (isdigit(**av)) { 4902 action->arg1 = strtoul(*av, NULL, 10); 4903 if (action->arg1 <= 0 || action->arg1 >= IP_FW_TABLEARG) 4904 errx(EX_DATAERR, "illegal argument for %s", 4905 *(av - 1)); 4906 } else if (_substrcmp(*av, TABLEARG) == 0) { 4907 action->arg1 = IP_FW_TABLEARG; 4908 } else if (i == TOK_DIVERT || i == TOK_TEE) { 4909 struct servent *s; 4910 setservent(1); 4911 s = getservbyname(av[0], "divert"); 4912 if (s != NULL) 4913 action->arg1 = ntohs(s->s_port); 4914 else 4915 errx(EX_DATAERR, "illegal divert/tee port"); 4916 } else 4917 errx(EX_DATAERR, "illegal argument for %s", *(av - 1)); 4918 ac--; av++; 4919 break; 4920 4921 case TOK_FORWARD: { 4922 ipfw_insn_sa *p = (ipfw_insn_sa *)action; 4923 char *s, *end; 4924 4925 NEED1("missing forward address[:port]"); 4926 4927 action->opcode = O_FORWARD_IP; 4928 action->len = F_INSN_SIZE(ipfw_insn_sa); 4929 4930 p->sa.sin_len = sizeof(struct sockaddr_in); 4931 p->sa.sin_family = AF_INET; 4932 p->sa.sin_port = 0; 4933 /* 4934 * locate the address-port separator (':' or ',') 4935 */ 4936 s = strchr(*av, ':'); 4937 if (s == NULL) 4938 s = strchr(*av, ','); 4939 if (s != NULL) { 4940 *(s++) = '\0'; 4941 i = strtoport(s, &end, 0 /* base */, 0 /* proto */); 4942 if (s == end) 4943 errx(EX_DATAERR, 4944 "illegal forwarding port ``%s''", s); 4945 p->sa.sin_port = (u_short)i; 4946 } 4947 if (_substrcmp(*av, "tablearg") == 0) 4948 p->sa.sin_addr.s_addr = INADDR_ANY; 4949 else 4950 lookup_host(*av, &(p->sa.sin_addr)); 4951 ac--; av++; 4952 break; 4953 } 4954 case TOK_COMMENT: 4955 /* pretend it is a 'count' rule followed by the comment */ 4956 action->opcode = O_COUNT; 4957 ac++; av--; /* go back... */ 4958 break; 4959 4960 case TOK_SETFIB: 4961 { 4962 int numfibs; 4963 size_t intsize = sizeof(int); 4964 4965 action->opcode = O_SETFIB; 4966 NEED1("missing fib number"); 4967 action->arg1 = strtoul(*av, NULL, 10); 4968 if (sysctlbyname("net.fibs", &numfibs, &intsize, NULL, 0) == -1) 4969 errx(EX_DATAERR, "fibs not suported.\n"); 4970 if (action->arg1 >= numfibs) /* Temporary */ 4971 errx(EX_DATAERR, "fib too large.\n"); 4972 ac--; av++; 4973 break; 4974 } 4975 4976 default: 4977 errx(EX_DATAERR, "invalid action %s\n", av[-1]); 4978 } 4979 action = next_cmd(action); 4980 4981 /* 4982 * [altq queuename] -- altq tag, optional 4983 * [log [logamount N]] -- log, optional 4984 * 4985 * If they exist, it go first in the cmdbuf, but then it is 4986 * skipped in the copy section to the end of the buffer. 4987 */ 4988 while (ac != 0 && (i = match_token(rule_action_params, *av)) != -1) { 4989 ac--; av++; 4990 switch (i) { 4991 case TOK_LOG: 4992 { 4993 ipfw_insn_log *c = (ipfw_insn_log *)cmd; 4994 int l; 4995 4996 if (have_log) 4997 errx(EX_DATAERR, 4998 "log cannot be specified more than once"); 4999 have_log = (ipfw_insn *)c; 5000 cmd->len = F_INSN_SIZE(ipfw_insn_log); 5001 cmd->opcode = O_LOG; 5002 if (ac && _substrcmp(*av, "logamount") == 0) { 5003 ac--; av++; 5004 NEED1("logamount requires argument"); 5005 l = atoi(*av); 5006 if (l < 0) 5007 errx(EX_DATAERR, 5008 "logamount must be positive"); 5009 c->max_log = l; 5010 ac--; av++; 5011 } else { 5012 len = sizeof(c->max_log); 5013 if (sysctlbyname("net.inet.ip.fw.verbose_limit", 5014 &c->max_log, &len, NULL, 0) == -1) 5015 errx(1, "sysctlbyname(\"%s\")", 5016 "net.inet.ip.fw.verbose_limit"); 5017 } 5018 } 5019 break; 5020 5021 case TOK_ALTQ: 5022 { 5023 ipfw_insn_altq *a = (ipfw_insn_altq *)cmd; 5024 5025 NEED1("missing altq queue name"); 5026 if (have_altq) 5027 errx(EX_DATAERR, 5028 "altq cannot be specified more than once"); 5029 have_altq = (ipfw_insn *)a; 5030 cmd->len = F_INSN_SIZE(ipfw_insn_altq); 5031 cmd->opcode = O_ALTQ; 5032 fill_altq_qid(&a->qid, *av); 5033 ac--; av++; 5034 } 5035 break; 5036 5037 case TOK_TAG: 5038 case TOK_UNTAG: { 5039 uint16_t tag; 5040 5041 if (have_tag) 5042 errx(EX_USAGE, "tag and untag cannot be " 5043 "specified more than once"); 5044 GET_UINT_ARG(tag, 1, IPFW_DEFAULT_RULE - 1, i, 5045 rule_action_params); 5046 have_tag = cmd; 5047 fill_cmd(cmd, O_TAG, (i == TOK_TAG) ? 0: F_NOT, tag); 5048 ac--; av++; 5049 break; 5050 } 5051 5052 default: 5053 abort(); 5054 } 5055 cmd = next_cmd(cmd); 5056 } 5057 5058 if (have_state) /* must be a check-state, we are done */ 5059 goto done; 5060 5061#define OR_START(target) \ 5062 if (ac && (*av[0] == '(' || *av[0] == '{')) { \ 5063 if (open_par) \ 5064 errx(EX_USAGE, "nested \"(\" not allowed\n"); \ 5065 prev = NULL; \ 5066 open_par = 1; \ 5067 if ( (av[0])[1] == '\0') { \ 5068 ac--; av++; \ 5069 } else \ 5070 (*av)++; \ 5071 } \ 5072 target: \ 5073 5074 5075#define CLOSE_PAR \ 5076 if (open_par) { \ 5077 if (ac && ( \ 5078 strcmp(*av, ")") == 0 || \ 5079 strcmp(*av, "}") == 0)) { \ 5080 prev = NULL; \ 5081 open_par = 0; \ 5082 ac--; av++; \ 5083 } else \ 5084 errx(EX_USAGE, "missing \")\"\n"); \ 5085 } 5086 5087#define NOT_BLOCK \ 5088 if (ac && _substrcmp(*av, "not") == 0) { \ 5089 if (cmd->len & F_NOT) \ 5090 errx(EX_USAGE, "double \"not\" not allowed\n"); \ 5091 cmd->len |= F_NOT; \ 5092 ac--; av++; \ 5093 } 5094 5095#define OR_BLOCK(target) \ 5096 if (ac && _substrcmp(*av, "or") == 0) { \ 5097 if (prev == NULL || open_par == 0) \ 5098 errx(EX_DATAERR, "invalid OR block"); \ 5099 prev->len |= F_OR; \ 5100 ac--; av++; \ 5101 goto target; \ 5102 } \ 5103 CLOSE_PAR; 5104 5105 first_cmd = cmd; 5106 5107#if 0 5108 /* 5109 * MAC addresses, optional. 5110 * If we have this, we skip the part "proto from src to dst" 5111 * and jump straight to the option parsing. 5112 */ 5113 NOT_BLOCK; 5114 NEED1("missing protocol"); 5115 if (_substrcmp(*av, "MAC") == 0 || 5116 _substrcmp(*av, "mac") == 0) { 5117 ac--; av++; /* the "MAC" keyword */ 5118 add_mac(cmd, ac, av); /* exits in case of errors */ 5119 cmd = next_cmd(cmd); 5120 ac -= 2; av += 2; /* dst-mac and src-mac */ 5121 NOT_BLOCK; 5122 NEED1("missing mac type"); 5123 if (add_mactype(cmd, ac, av[0])) 5124 cmd = next_cmd(cmd); 5125 ac--; av++; /* any or mac-type */ 5126 goto read_options; 5127 } 5128#endif 5129 5130 /* 5131 * protocol, mandatory 5132 */ 5133 OR_START(get_proto); 5134 NOT_BLOCK; 5135 NEED1("missing protocol"); 5136 if (add_proto_compat(cmd, *av, &proto)) { 5137 av++; ac--; 5138 if (F_LEN(cmd) != 0) { 5139 prev = cmd; 5140 cmd = next_cmd(cmd); 5141 } 5142 } else if (first_cmd != cmd) { 5143 errx(EX_DATAERR, "invalid protocol ``%s''", *av); 5144 } else 5145 goto read_options; 5146 OR_BLOCK(get_proto); 5147 5148 /* 5149 * "from", mandatory 5150 */ 5151 if (!ac || _substrcmp(*av, "from") != 0) 5152 errx(EX_USAGE, "missing ``from''"); 5153 ac--; av++; 5154 5155 /* 5156 * source IP, mandatory 5157 */ 5158 OR_START(source_ip); 5159 NOT_BLOCK; /* optional "not" */ 5160 NEED1("missing source address"); 5161 if (add_src(cmd, *av, proto)) { 5162 ac--; av++; 5163 if (F_LEN(cmd) != 0) { /* ! any */ 5164 prev = cmd; 5165 cmd = next_cmd(cmd); 5166 } 5167 } else 5168 errx(EX_USAGE, "bad source address %s", *av); 5169 OR_BLOCK(source_ip); 5170 5171 /* 5172 * source ports, optional 5173 */ 5174 NOT_BLOCK; /* optional "not" */ 5175 if (ac) { 5176 if (_substrcmp(*av, "any") == 0 || 5177 add_ports(cmd, *av, proto, O_IP_SRCPORT)) { 5178 ac--; av++; 5179 if (F_LEN(cmd) != 0) 5180 cmd = next_cmd(cmd); 5181 } 5182 } 5183 5184 /* 5185 * "to", mandatory 5186 */ 5187 if (!ac || _substrcmp(*av, "to") != 0) 5188 errx(EX_USAGE, "missing ``to''"); 5189 av++; ac--; 5190 5191 /* 5192 * destination, mandatory 5193 */ 5194 OR_START(dest_ip); 5195 NOT_BLOCK; /* optional "not" */ 5196 NEED1("missing dst address"); 5197 if (add_dst(cmd, *av, proto)) { 5198 ac--; av++; 5199 if (F_LEN(cmd) != 0) { /* ! any */ 5200 prev = cmd; 5201 cmd = next_cmd(cmd); 5202 } 5203 } else 5204 errx( EX_USAGE, "bad destination address %s", *av); 5205 OR_BLOCK(dest_ip); 5206 5207 /* 5208 * dest. ports, optional 5209 */ 5210 NOT_BLOCK; /* optional "not" */ 5211 if (ac) { 5212 if (_substrcmp(*av, "any") == 0 || 5213 add_ports(cmd, *av, proto, O_IP_DSTPORT)) { 5214 ac--; av++; 5215 if (F_LEN(cmd) != 0) 5216 cmd = next_cmd(cmd); 5217 } 5218 } 5219 5220read_options: 5221 if (ac && first_cmd == cmd) { 5222 /* 5223 * nothing specified so far, store in the rule to ease 5224 * printout later. 5225 */ 5226 rule->_pad = 1; 5227 } 5228 prev = NULL; 5229 while (ac) { 5230 char *s; 5231 ipfw_insn_u32 *cmd32; /* alias for cmd */ 5232 5233 s = *av; 5234 cmd32 = (ipfw_insn_u32 *)cmd; 5235 5236 if (*s == '!') { /* alternate syntax for NOT */ 5237 if (cmd->len & F_NOT) 5238 errx(EX_USAGE, "double \"not\" not allowed\n"); 5239 cmd->len = F_NOT; 5240 s++; 5241 } 5242 i = match_token(rule_options, s); 5243 ac--; av++; 5244 switch(i) { 5245 case TOK_NOT: 5246 if (cmd->len & F_NOT) 5247 errx(EX_USAGE, "double \"not\" not allowed\n"); 5248 cmd->len = F_NOT; 5249 break; 5250 5251 case TOK_OR: 5252 if (open_par == 0 || prev == NULL) 5253 errx(EX_USAGE, "invalid \"or\" block\n"); 5254 prev->len |= F_OR; 5255 break; 5256 5257 case TOK_STARTBRACE: 5258 if (open_par) 5259 errx(EX_USAGE, "+nested \"(\" not allowed\n"); 5260 open_par = 1; 5261 break; 5262 5263 case TOK_ENDBRACE: 5264 if (!open_par) 5265 errx(EX_USAGE, "+missing \")\"\n"); 5266 open_par = 0; 5267 prev = NULL; 5268 break; 5269 5270 case TOK_IN: 5271 fill_cmd(cmd, O_IN, 0, 0); 5272 break; 5273 5274 case TOK_OUT: 5275 cmd->len ^= F_NOT; /* toggle F_NOT */ 5276 fill_cmd(cmd, O_IN, 0, 0); 5277 break; 5278 5279 case TOK_DIVERTED: 5280 fill_cmd(cmd, O_DIVERTED, 0, 3); 5281 break; 5282 5283 case TOK_DIVERTEDLOOPBACK: 5284 fill_cmd(cmd, O_DIVERTED, 0, 1); 5285 break; 5286 5287 case TOK_DIVERTEDOUTPUT: 5288 fill_cmd(cmd, O_DIVERTED, 0, 2); 5289 break; 5290 5291 case TOK_FRAG: 5292 fill_cmd(cmd, O_FRAG, 0, 0); 5293 break; 5294 5295 case TOK_LAYER2: 5296 fill_cmd(cmd, O_LAYER2, 0, 0); 5297 break; 5298 5299 case TOK_XMIT: 5300 case TOK_RECV: 5301 case TOK_VIA: 5302 NEED1("recv, xmit, via require interface name" 5303 " or address"); 5304 fill_iface((ipfw_insn_if *)cmd, av[0]); 5305 ac--; av++; 5306 if (F_LEN(cmd) == 0) /* not a valid address */ 5307 break; 5308 if (i == TOK_XMIT) 5309 cmd->opcode = O_XMIT; 5310 else if (i == TOK_RECV) 5311 cmd->opcode = O_RECV; 5312 else if (i == TOK_VIA) 5313 cmd->opcode = O_VIA; 5314 break; 5315 5316 case TOK_ICMPTYPES: 5317 NEED1("icmptypes requires list of types"); 5318 fill_icmptypes((ipfw_insn_u32 *)cmd, *av); 5319 av++; ac--; 5320 break; 5321 5322 case TOK_ICMP6TYPES: 5323 NEED1("icmptypes requires list of types"); 5324 fill_icmp6types((ipfw_insn_icmp6 *)cmd, *av); 5325 av++; ac--; 5326 break; 5327 5328 case TOK_IPTTL: 5329 NEED1("ipttl requires TTL"); 5330 if (strpbrk(*av, "-,")) { 5331 if (!add_ports(cmd, *av, 0, O_IPTTL)) 5332 errx(EX_DATAERR, "invalid ipttl %s", *av); 5333 } else 5334 fill_cmd(cmd, O_IPTTL, 0, strtoul(*av, NULL, 0)); 5335 ac--; av++; 5336 break; 5337 5338 case TOK_IPID: 5339 NEED1("ipid requires id"); 5340 if (strpbrk(*av, "-,")) { 5341 if (!add_ports(cmd, *av, 0, O_IPID)) 5342 errx(EX_DATAERR, "invalid ipid %s", *av); 5343 } else 5344 fill_cmd(cmd, O_IPID, 0, strtoul(*av, NULL, 0)); 5345 ac--; av++; 5346 break; 5347 5348 case TOK_IPLEN: 5349 NEED1("iplen requires length"); 5350 if (strpbrk(*av, "-,")) { 5351 if (!add_ports(cmd, *av, 0, O_IPLEN)) 5352 errx(EX_DATAERR, "invalid ip len %s", *av); 5353 } else 5354 fill_cmd(cmd, O_IPLEN, 0, strtoul(*av, NULL, 0)); 5355 ac--; av++; 5356 break; 5357 5358 case TOK_IPVER: 5359 NEED1("ipver requires version"); 5360 fill_cmd(cmd, O_IPVER, 0, strtoul(*av, NULL, 0)); 5361 ac--; av++; 5362 break; 5363 5364 case TOK_IPPRECEDENCE: 5365 NEED1("ipprecedence requires value"); 5366 fill_cmd(cmd, O_IPPRECEDENCE, 0, 5367 (strtoul(*av, NULL, 0) & 7) << 5); 5368 ac--; av++; 5369 break; 5370 5371 case TOK_IPOPTS: 5372 NEED1("missing argument for ipoptions"); 5373 fill_flags(cmd, O_IPOPT, f_ipopts, *av); 5374 ac--; av++; 5375 break; 5376 5377 case TOK_IPTOS: 5378 NEED1("missing argument for iptos"); 5379 fill_flags(cmd, O_IPTOS, f_iptos, *av); 5380 ac--; av++; 5381 break; 5382 5383 case TOK_UID: 5384 NEED1("uid requires argument"); 5385 { 5386 char *end; 5387 uid_t uid; 5388 struct passwd *pwd; 5389 5390 cmd->opcode = O_UID; 5391 uid = strtoul(*av, &end, 0); 5392 pwd = (*end == '\0') ? getpwuid(uid) : getpwnam(*av); 5393 if (pwd == NULL) 5394 errx(EX_DATAERR, "uid \"%s\" nonexistent", *av); 5395 cmd32->d[0] = pwd->pw_uid; 5396 cmd->len |= F_INSN_SIZE(ipfw_insn_u32); 5397 ac--; av++; 5398 } 5399 break; 5400 5401 case TOK_GID: 5402 NEED1("gid requires argument"); 5403 { 5404 char *end; 5405 gid_t gid; 5406 struct group *grp; 5407 5408 cmd->opcode = O_GID; 5409 gid = strtoul(*av, &end, 0); 5410 grp = (*end == '\0') ? getgrgid(gid) : getgrnam(*av); 5411 if (grp == NULL) 5412 errx(EX_DATAERR, "gid \"%s\" nonexistent", *av); 5413 cmd32->d[0] = grp->gr_gid; 5414 cmd->len |= F_INSN_SIZE(ipfw_insn_u32); 5415 ac--; av++; 5416 } 5417 break; 5418 5419 case TOK_JAIL: 5420 NEED1("jail requires argument"); 5421 { 5422 char *end; 5423 int jid; 5424 5425 cmd->opcode = O_JAIL; 5426 jid = (int)strtol(*av, &end, 0); 5427 if (jid < 0 || *end != '\0') 5428 errx(EX_DATAERR, "jail requires prison ID"); 5429 cmd32->d[0] = (uint32_t)jid; 5430 cmd->len |= F_INSN_SIZE(ipfw_insn_u32); 5431 ac--; av++; 5432 } 5433 break; 5434 5435 case TOK_ESTAB: 5436 fill_cmd(cmd, O_ESTAB, 0, 0); 5437 break; 5438 5439 case TOK_SETUP: 5440 fill_cmd(cmd, O_TCPFLAGS, 0, 5441 (TH_SYN) | ( (TH_ACK) & 0xff) <<8 ); 5442 break; 5443 5444 case TOK_TCPDATALEN: 5445 NEED1("tcpdatalen requires length"); 5446 if (strpbrk(*av, "-,")) { 5447 if (!add_ports(cmd, *av, 0, O_TCPDATALEN)) 5448 errx(EX_DATAERR, "invalid tcpdata len %s", *av); 5449 } else 5450 fill_cmd(cmd, O_TCPDATALEN, 0, 5451 strtoul(*av, NULL, 0)); 5452 ac--; av++; 5453 break; 5454 5455 case TOK_TCPOPTS: 5456 NEED1("missing argument for tcpoptions"); 5457 fill_flags(cmd, O_TCPOPTS, f_tcpopts, *av); 5458 ac--; av++; 5459 break; 5460 5461 case TOK_TCPSEQ: 5462 case TOK_TCPACK: 5463 NEED1("tcpseq/tcpack requires argument"); 5464 cmd->len = F_INSN_SIZE(ipfw_insn_u32); 5465 cmd->opcode = (i == TOK_TCPSEQ) ? O_TCPSEQ : O_TCPACK; 5466 cmd32->d[0] = htonl(strtoul(*av, NULL, 0)); 5467 ac--; av++; 5468 break; 5469 5470 case TOK_TCPWIN: 5471 NEED1("tcpwin requires length"); 5472 fill_cmd(cmd, O_TCPWIN, 0, 5473 htons(strtoul(*av, NULL, 0))); 5474 ac--; av++; 5475 break; 5476 5477 case TOK_TCPFLAGS: 5478 NEED1("missing argument for tcpflags"); 5479 cmd->opcode = O_TCPFLAGS; 5480 fill_flags(cmd, O_TCPFLAGS, f_tcpflags, *av); 5481 ac--; av++; 5482 break; 5483 5484 case TOK_KEEPSTATE: 5485 if (open_par) 5486 errx(EX_USAGE, "keep-state cannot be part " 5487 "of an or block"); 5488 if (have_state) 5489 errx(EX_USAGE, "only one of keep-state " 5490 "and limit is allowed"); 5491 have_state = cmd; 5492 fill_cmd(cmd, O_KEEP_STATE, 0, 0); 5493 break; 5494 5495 case TOK_LIMIT: { 5496 ipfw_insn_limit *c = (ipfw_insn_limit *)cmd; 5497 int val; 5498 5499 if (open_par) 5500 errx(EX_USAGE, 5501 "limit cannot be part of an or block"); 5502 if (have_state) 5503 errx(EX_USAGE, "only one of keep-state and " 5504 "limit is allowed"); 5505 have_state = cmd; 5506 5507 cmd->len = F_INSN_SIZE(ipfw_insn_limit); 5508 cmd->opcode = O_LIMIT; 5509 c->limit_mask = c->conn_limit = 0; 5510 5511 while (ac > 0) { 5512 if ((val = match_token(limit_masks, *av)) <= 0) 5513 break; 5514 c->limit_mask |= val; 5515 ac--; av++; 5516 } 5517 5518 if (c->limit_mask == 0) 5519 errx(EX_USAGE, "limit: missing limit mask"); 5520 5521 GET_UINT_ARG(c->conn_limit, 1, IPFW_DEFAULT_RULE - 1, 5522 TOK_LIMIT, rule_options); 5523 5524 ac--; av++; 5525 break; 5526 } 5527 5528 case TOK_PROTO: 5529 NEED1("missing protocol"); 5530 if (add_proto(cmd, *av, &proto)) { 5531 ac--; av++; 5532 } else 5533 errx(EX_DATAERR, "invalid protocol ``%s''", 5534 *av); 5535 break; 5536 5537 case TOK_SRCIP: 5538 NEED1("missing source IP"); 5539 if (add_srcip(cmd, *av)) { 5540 ac--; av++; 5541 } 5542 break; 5543 5544 case TOK_DSTIP: 5545 NEED1("missing destination IP"); 5546 if (add_dstip(cmd, *av)) { 5547 ac--; av++; 5548 } 5549 break; 5550 5551 case TOK_SRCIP6: 5552 NEED1("missing source IP6"); 5553 if (add_srcip6(cmd, *av)) { 5554 ac--; av++; 5555 } 5556 break; 5557 5558 case TOK_DSTIP6: 5559 NEED1("missing destination IP6"); 5560 if (add_dstip6(cmd, *av)) { 5561 ac--; av++; 5562 } 5563 break; 5564 5565 case TOK_SRCPORT: 5566 NEED1("missing source port"); 5567 if (_substrcmp(*av, "any") == 0 || 5568 add_ports(cmd, *av, proto, O_IP_SRCPORT)) { 5569 ac--; av++; 5570 } else 5571 errx(EX_DATAERR, "invalid source port %s", *av); 5572 break; 5573 5574 case TOK_DSTPORT: 5575 NEED1("missing destination port"); 5576 if (_substrcmp(*av, "any") == 0 || 5577 add_ports(cmd, *av, proto, O_IP_DSTPORT)) { 5578 ac--; av++; 5579 } else 5580 errx(EX_DATAERR, "invalid destination port %s", 5581 *av); 5582 break; 5583 5584 case TOK_MAC: 5585 if (add_mac(cmd, ac, av)) { 5586 ac -= 2; av += 2; 5587 } 5588 break; 5589 5590 case TOK_MACTYPE: 5591 NEED1("missing mac type"); 5592 if (!add_mactype(cmd, ac, *av)) 5593 errx(EX_DATAERR, "invalid mac type %s", *av); 5594 ac--; av++; 5595 break; 5596 5597 case TOK_VERREVPATH: 5598 fill_cmd(cmd, O_VERREVPATH, 0, 0); 5599 break; 5600 5601 case TOK_VERSRCREACH: 5602 fill_cmd(cmd, O_VERSRCREACH, 0, 0); 5603 break; 5604 5605 case TOK_ANTISPOOF: 5606 fill_cmd(cmd, O_ANTISPOOF, 0, 0); 5607 break; 5608 5609 case TOK_IPSEC: 5610 fill_cmd(cmd, O_IPSEC, 0, 0); 5611 break; 5612 5613 case TOK_IPV6: 5614 fill_cmd(cmd, O_IP6, 0, 0); 5615 break; 5616 5617 case TOK_IPV4: 5618 fill_cmd(cmd, O_IP4, 0, 0); 5619 break; 5620 5621 case TOK_EXT6HDR: 5622 fill_ext6hdr( cmd, *av ); 5623 ac--; av++; 5624 break; 5625 5626 case TOK_FLOWID: 5627 if (proto != IPPROTO_IPV6 ) 5628 errx( EX_USAGE, "flow-id filter is active " 5629 "only for ipv6 protocol\n"); 5630 fill_flow6( (ipfw_insn_u32 *) cmd, *av ); 5631 ac--; av++; 5632 break; 5633 5634 case TOK_COMMENT: 5635 fill_comment(cmd, ac, av); 5636 av += ac; 5637 ac = 0; 5638 break; 5639 5640 case TOK_TAGGED: 5641 if (ac > 0 && strpbrk(*av, "-,")) { 5642 if (!add_ports(cmd, *av, 0, O_TAGGED)) 5643 errx(EX_DATAERR, "tagged: invalid tag" 5644 " list: %s", *av); 5645 } 5646 else { 5647 uint16_t tag; 5648 5649 GET_UINT_ARG(tag, 1, IPFW_DEFAULT_RULE - 1, 5650 TOK_TAGGED, rule_options); 5651 fill_cmd(cmd, O_TAGGED, 0, tag); 5652 } 5653 ac--; av++; 5654 break; 5655 5656 case TOK_FIB: 5657 NEED1("fib requires fib number"); 5658 fill_cmd(cmd, O_FIB, 0, strtoul(*av, NULL, 0)); 5659 ac--; av++; 5660 break; 5661 5662 default: 5663 errx(EX_USAGE, "unrecognised option [%d] %s\n", i, s); 5664 } 5665 if (F_LEN(cmd) > 0) { /* prepare to advance */ 5666 prev = cmd; 5667 cmd = next_cmd(cmd); 5668 } 5669 } 5670 5671done: 5672 /* 5673 * Now copy stuff into the rule. 5674 * If we have a keep-state option, the first instruction 5675 * must be a PROBE_STATE (which is generated here). 5676 * If we have a LOG option, it was stored as the first command, 5677 * and now must be moved to the top of the action part. 5678 */ 5679 dst = (ipfw_insn *)rule->cmd; 5680 5681 /* 5682 * First thing to write into the command stream is the match probability. 5683 */ 5684 if (match_prob != 1) { /* 1 means always match */ 5685 dst->opcode = O_PROB; 5686 dst->len = 2; 5687 *((int32_t *)(dst+1)) = (int32_t)(match_prob * 0x7fffffff); 5688 dst += dst->len; 5689 } 5690 5691 /* 5692 * generate O_PROBE_STATE if necessary 5693 */ 5694 if (have_state && have_state->opcode != O_CHECK_STATE) { 5695 fill_cmd(dst, O_PROBE_STATE, 0, 0); 5696 dst = next_cmd(dst); 5697 } 5698 5699 /* copy all commands but O_LOG, O_KEEP_STATE, O_LIMIT, O_ALTQ, O_TAG */ 5700 for (src = (ipfw_insn *)cmdbuf; src != cmd; src += i) { 5701 i = F_LEN(src); 5702 5703 switch (src->opcode) { 5704 case O_LOG: 5705 case O_KEEP_STATE: 5706 case O_LIMIT: 5707 case O_ALTQ: 5708 case O_TAG: 5709 break; 5710 default: 5711 bcopy(src, dst, i * sizeof(uint32_t)); 5712 dst += i; 5713 } 5714 } 5715 5716 /* 5717 * put back the have_state command as last opcode 5718 */ 5719 if (have_state && have_state->opcode != O_CHECK_STATE) { 5720 i = F_LEN(have_state); 5721 bcopy(have_state, dst, i * sizeof(uint32_t)); 5722 dst += i; 5723 } 5724 /* 5725 * start action section 5726 */ 5727 rule->act_ofs = dst - rule->cmd; 5728 5729 /* put back O_LOG, O_ALTQ, O_TAG if necessary */ 5730 if (have_log) { 5731 i = F_LEN(have_log); 5732 bcopy(have_log, dst, i * sizeof(uint32_t)); 5733 dst += i; 5734 } 5735 if (have_altq) { 5736 i = F_LEN(have_altq); 5737 bcopy(have_altq, dst, i * sizeof(uint32_t)); 5738 dst += i; 5739 } 5740 if (have_tag) { 5741 i = F_LEN(have_tag); 5742 bcopy(have_tag, dst, i * sizeof(uint32_t)); 5743 dst += i; 5744 } 5745 /* 5746 * copy all other actions 5747 */ 5748 for (src = (ipfw_insn *)actbuf; src != action; src += i) { 5749 i = F_LEN(src); 5750 bcopy(src, dst, i * sizeof(uint32_t)); 5751 dst += i; 5752 } 5753 5754 rule->cmd_len = (uint32_t *)dst - (uint32_t *)(rule->cmd); 5755 i = (char *)dst - (char *)rule; 5756 if (do_cmd(IP_FW_ADD, rule, (uintptr_t)&i) == -1) 5757 err(EX_UNAVAILABLE, "getsockopt(%s)", "IP_FW_ADD"); 5758 if (!do_quiet) 5759 show_ipfw(rule, 0, 0); 5760} 5761 5762static void 5763zero(int ac, char *av[], int optname /* IP_FW_ZERO or IP_FW_RESETLOG */) 5764{ 5765 uint32_t arg, saved_arg; 5766 int failed = EX_OK; 5767 char const *name = optname == IP_FW_ZERO ? "ZERO" : "RESETLOG"; 5768 char const *errstr; 5769 5770 av++; ac--; 5771 5772 if (!ac) { 5773 /* clear all entries */ 5774 if (do_cmd(optname, NULL, 0) < 0) 5775 err(EX_UNAVAILABLE, "setsockopt(IP_FW_%s)", name); 5776 if (!do_quiet) 5777 printf("%s.\n", optname == IP_FW_ZERO ? 5778 "Accounting cleared":"Logging counts reset"); 5779 5780 return; 5781 } 5782 5783 while (ac) { 5784 /* Rule number */ 5785 if (isdigit(**av)) { 5786 arg = strtonum(*av, 0, 0xffff, &errstr); 5787 if (errstr) 5788 errx(EX_DATAERR, 5789 "invalid rule number %s\n", *av); 5790 saved_arg = arg; 5791 if (use_set) 5792 arg |= (1 << 24) | ((use_set - 1) << 16); 5793 av++; 5794 ac--; 5795 if (do_cmd(optname, &arg, sizeof(arg))) { 5796 warn("rule %u: setsockopt(IP_FW_%s)", 5797 saved_arg, name); 5798 failed = EX_UNAVAILABLE; 5799 } else if (!do_quiet) 5800 printf("Entry %d %s.\n", saved_arg, 5801 optname == IP_FW_ZERO ? 5802 "cleared" : "logging count reset"); 5803 } else { 5804 errx(EX_USAGE, "invalid rule number ``%s''", *av); 5805 } 5806 } 5807 if (failed != EX_OK) 5808 exit(failed); 5809} 5810 5811static void 5812flush(int force) 5813{ 5814 int cmd = do_pipe ? IP_DUMMYNET_FLUSH : IP_FW_FLUSH; 5815 5816 if (!force && !do_quiet) { /* need to ask user */ 5817 int c; 5818 5819 printf("Are you sure? [yn] "); 5820 fflush(stdout); 5821 do { 5822 c = toupper(getc(stdin)); 5823 while (c != '\n' && getc(stdin) != '\n') 5824 if (feof(stdin)) 5825 return; /* and do not flush */ 5826 } while (c != 'Y' && c != 'N'); 5827 printf("\n"); 5828 if (c == 'N') /* user said no */ 5829 return; 5830 } 5831 /* `ipfw set N flush` - is the same that `ipfw delete set N` */ 5832 if (use_set) { 5833 uint32_t arg = ((use_set - 1) & 0xffff) | (1 << 24); 5834 if (do_cmd(IP_FW_DEL, &arg, sizeof(arg)) < 0) 5835 err(EX_UNAVAILABLE, "setsockopt(IP_FW_DEL)"); 5836 } else if (do_cmd(cmd, NULL, 0) < 0) 5837 err(EX_UNAVAILABLE, "setsockopt(IP_%s_FLUSH)", 5838 do_pipe ? "DUMMYNET" : "FW"); 5839 if (!do_quiet) 5840 printf("Flushed all %s.\n", do_pipe ? "pipes" : "rules"); 5841} 5842 5843/* 5844 * Free a the (locally allocated) copy of command line arguments. 5845 */ 5846static void 5847free_args(int ac, char **av) 5848{ 5849 int i; 5850 5851 for (i=0; i < ac; i++) 5852 free(av[i]); 5853 free(av); 5854} 5855 5856static void table_list(ipfw_table_entry ent, int need_header); 5857 5858/* 5859 * This one handles all table-related commands 5860 * ipfw table N add addr[/masklen] [value] 5861 * ipfw table N delete addr[/masklen] 5862 * ipfw table {N | all} flush 5863 * ipfw table {N | all} list 5864 */ 5865static void 5866table_handler(int ac, char *av[]) 5867{ 5868 ipfw_table_entry ent; 5869 int do_add; 5870 int is_all; 5871 size_t len; 5872 char *p; 5873 uint32_t a; 5874 uint32_t tables_max; 5875 5876 len = sizeof(tables_max); 5877 if (sysctlbyname("net.inet.ip.fw.tables_max", &tables_max, &len, 5878 NULL, 0) == -1) { 5879#ifdef IPFW_TABLES_MAX 5880 warn("Warn: Failed to get the max tables number via sysctl. " 5881 "Using the compiled in defaults. \nThe reason was"); 5882 tables_max = IPFW_TABLES_MAX; 5883#else 5884 errx(1, "Failed sysctlbyname(\"net.inet.ip.fw.tables_max\")"); 5885#endif 5886 } 5887 5888 ac--; av++; 5889 if (ac && isdigit(**av)) { 5890 ent.tbl = atoi(*av); 5891 is_all = 0; 5892 ac--; av++; 5893 } else if (ac && _substrcmp(*av, "all") == 0) { 5894 ent.tbl = 0; 5895 is_all = 1; 5896 ac--; av++; 5897 } else 5898 errx(EX_USAGE, "table number or 'all' keyword required"); 5899 if (ent.tbl >= tables_max) 5900 errx(EX_USAGE, "The table number exceeds the maximum allowed " 5901 "value (%d)", tables_max - 1); 5902 NEED1("table needs command"); 5903 if (is_all && _substrcmp(*av, "list") != 0 5904 && _substrcmp(*av, "flush") != 0) 5905 errx(EX_USAGE, "table number required"); 5906 5907 if (_substrcmp(*av, "add") == 0 || 5908 _substrcmp(*av, "delete") == 0) { 5909 do_add = **av == 'a'; 5910 ac--; av++; 5911 if (!ac) 5912 errx(EX_USAGE, "IP address required"); 5913 p = strchr(*av, '/'); 5914 if (p) { 5915 *p++ = '\0'; 5916 ent.masklen = atoi(p); 5917 if (ent.masklen > 32) 5918 errx(EX_DATAERR, "bad width ``%s''", p); 5919 } else 5920 ent.masklen = 32; 5921 if (lookup_host(*av, (struct in_addr *)&ent.addr) != 0) 5922 errx(EX_NOHOST, "hostname ``%s'' unknown", *av); 5923 ac--; av++; 5924 if (do_add && ac) { 5925 unsigned int tval; 5926 /* isdigit is a bit of a hack here.. */ 5927 if (strchr(*av, (int)'.') == NULL && isdigit(**av)) { 5928 ent.value = strtoul(*av, NULL, 0); 5929 } else { 5930 if (lookup_host(*av, (struct in_addr *)&tval) == 0) { 5931 /* The value must be stored in host order * 5932 * so that the values < 65k can be distinguished */ 5933 ent.value = ntohl(tval); 5934 } else { 5935 errx(EX_NOHOST, "hostname ``%s'' unknown", *av); 5936 } 5937 } 5938 } else 5939 ent.value = 0; 5940 if (do_cmd(do_add ? IP_FW_TABLE_ADD : IP_FW_TABLE_DEL, 5941 &ent, sizeof(ent)) < 0) { 5942 /* If running silent, don't bomb out on these errors. */ 5943 if (!(do_quiet && (errno == (do_add ? EEXIST : ESRCH)))) 5944 err(EX_OSERR, "setsockopt(IP_FW_TABLE_%s)", 5945 do_add ? "ADD" : "DEL"); 5946 /* In silent mode, react to a failed add by deleting */ 5947 if (do_add) { 5948 do_cmd(IP_FW_TABLE_DEL, &ent, sizeof(ent)); 5949 if (do_cmd(IP_FW_TABLE_ADD, 5950 &ent, sizeof(ent)) < 0) 5951 err(EX_OSERR, 5952 "setsockopt(IP_FW_TABLE_ADD)"); 5953 } 5954 } 5955 } else if (_substrcmp(*av, "flush") == 0) { 5956 a = is_all ? tables_max : (ent.tbl + 1); 5957 do { 5958 if (do_cmd(IP_FW_TABLE_FLUSH, &ent.tbl, 5959 sizeof(ent.tbl)) < 0) 5960 err(EX_OSERR, "setsockopt(IP_FW_TABLE_FLUSH)"); 5961 } while (++ent.tbl < a); 5962 } else if (_substrcmp(*av, "list") == 0) { 5963 a = is_all ? tables_max : (ent.tbl + 1); 5964 do { 5965 table_list(ent, is_all); 5966 } while (++ent.tbl < a); 5967 } else 5968 errx(EX_USAGE, "invalid table command %s", *av); 5969} 5970 5971static void 5972table_list(ipfw_table_entry ent, int need_header) 5973{ 5974 ipfw_table *tbl; 5975 socklen_t l; 5976 uint32_t a; 5977 5978 a = ent.tbl; 5979 l = sizeof(a); 5980 if (do_cmd(IP_FW_TABLE_GETSIZE, &a, (uintptr_t)&l) < 0) 5981 err(EX_OSERR, "getsockopt(IP_FW_TABLE_GETSIZE)"); 5982 5983 /* If a is zero we have nothing to do, the table is empty. */ 5984 if (a == 0) 5985 return; 5986 5987 l = sizeof(*tbl) + a * sizeof(ipfw_table_entry); 5988 tbl = malloc(l); 5989 if (tbl == NULL) 5990 err(EX_OSERR, "malloc"); 5991 tbl->tbl = ent.tbl; 5992 if (do_cmd(IP_FW_TABLE_LIST, tbl, (uintptr_t)&l) < 0) 5993 err(EX_OSERR, "getsockopt(IP_FW_TABLE_LIST)"); 5994 if (tbl->cnt && need_header) 5995 printf("---table(%d)---\n", tbl->tbl); 5996 for (a = 0; a < tbl->cnt; a++) { 5997 unsigned int tval; 5998 tval = tbl->ent[a].value; 5999 if (do_value_as_ip) { 6000 char tbuf[128]; 6001 strncpy(tbuf, inet_ntoa(*(struct in_addr *) 6002 &tbl->ent[a].addr), 127); 6003 /* inet_ntoa expects network order */ 6004 tval = htonl(tval); 6005 printf("%s/%u %s\n", tbuf, tbl->ent[a].masklen, 6006 inet_ntoa(*(struct in_addr *)&tval)); 6007 } else { 6008 printf("%s/%u %u\n", 6009 inet_ntoa(*(struct in_addr *)&tbl->ent[a].addr), 6010 tbl->ent[a].masklen, tval); 6011 } 6012 } 6013 free(tbl); 6014} 6015 6016static void 6017show_nat(int ac, char **av) 6018{ 6019 struct cfg_nat *n; 6020 struct cfg_redir *e; 6021 int cmd, i, nbytes, do_cfg, do_rule, frule, lrule, nalloc, size; 6022 int nat_cnt, redir_cnt, r; 6023 uint8_t *data, *p; 6024 char *endptr; 6025 6026 do_rule = 0; 6027 nalloc = 1024; 6028 size = 0; 6029 data = NULL; 6030 frule = 0; 6031 lrule = IPFW_DEFAULT_RULE; /* max ipfw rule number */ 6032 ac--; av++; 6033 6034 if (test_only) 6035 return; 6036 6037 /* Parse parameters. */ 6038 for (cmd = IP_FW_NAT_GET_LOG, do_cfg = 0; ac != 0; ac--, av++) { 6039 if (!strncmp(av[0], "config", strlen(av[0]))) { 6040 cmd = IP_FW_NAT_GET_CONFIG, do_cfg = 1; 6041 continue; 6042 } 6043 /* Convert command line rule #. */ 6044 frule = lrule = strtoul(av[0], &endptr, 10); 6045 if (*endptr == '-') 6046 lrule = strtoul(endptr+1, &endptr, 10); 6047 if (lrule == 0) 6048 err(EX_USAGE, "invalid rule number: %s", av[0]); 6049 do_rule = 1; 6050 } 6051 6052 nbytes = nalloc; 6053 while (nbytes >= nalloc) { 6054 nalloc = nalloc * 2; 6055 nbytes = nalloc; 6056 if ((data = realloc(data, nbytes)) == NULL) 6057 err(EX_OSERR, "realloc"); 6058 if (do_cmd(cmd, data, (uintptr_t)&nbytes) < 0) 6059 err(EX_OSERR, "getsockopt(IP_FW_GET_%s)", 6060 (cmd == IP_FW_NAT_GET_LOG) ? "LOG" : "CONFIG"); 6061 } 6062 if (nbytes == 0) 6063 exit(0); 6064 if (do_cfg) { 6065 nat_cnt = *((int *)data); 6066 for (i = sizeof(nat_cnt); nat_cnt; nat_cnt--) { 6067 n = (struct cfg_nat *)&data[i]; 6068 if (frule <= n->id && lrule >= n->id) 6069 print_nat_config(&data[i]); 6070 i += sizeof(struct cfg_nat); 6071 for (redir_cnt = 0; redir_cnt < n->redir_cnt; redir_cnt++) { 6072 e = (struct cfg_redir *)&data[i]; 6073 i += sizeof(struct cfg_redir) + e->spool_cnt * 6074 sizeof(struct cfg_spool); 6075 } 6076 } 6077 } else { 6078 for (i = 0; 1; i += LIBALIAS_BUF_SIZE + sizeof(int)) { 6079 p = &data[i]; 6080 if (p == data + nbytes) 6081 break; 6082 bcopy(p, &r, sizeof(int)); 6083 if (do_rule) { 6084 if (!(frule <= r && lrule >= r)) 6085 continue; 6086 } 6087 printf("nat %u: %s\n", r, p+sizeof(int)); 6088 } 6089 } 6090} 6091 6092/* 6093 * Called with the arguments, including program name because getopt 6094 * wants it to be present. 6095 * Returns 0 if successful, 1 if empty command, errx() in case of errors. 6096 */ 6097static int 6098ipfw_main(int oldac, char **oldav) 6099{ 6100 int ch, ac, save_ac; 6101 const char *errstr; 6102 char **av, **save_av; 6103 int do_acct = 0; /* Show packet/byte count */ 6104 6105#define WHITESP " \t\f\v\n\r" 6106 if (oldac < 2) 6107 return 1; /* need at least one argument */ 6108 if (oldac == 2) { 6109 /* 6110 * If we are called with a single string, try to split it into 6111 * arguments for subsequent parsing. 6112 * But first, remove spaces after a ',', by copying the string 6113 * in-place. 6114 */ 6115 char *arg = oldav[1]; /* The string is the first arg. */ 6116 int l = strlen(arg); 6117 int copy = 0; /* 1 if we need to copy, 0 otherwise */ 6118 int i, j; 6119 for (i = j = 0; i < l; i++) { 6120 if (arg[i] == '#') /* comment marker */ 6121 break; 6122 if (copy) { 6123 arg[j++] = arg[i]; 6124 copy = !index("," WHITESP, arg[i]); 6125 } else { 6126 copy = !index(WHITESP, arg[i]); 6127 if (copy) 6128 arg[j++] = arg[i]; 6129 } 6130 } 6131 if (!copy && j > 0) /* last char was a 'blank', remove it */ 6132 j--; 6133 l = j; /* the new argument length */ 6134 arg[j++] = '\0'; 6135 if (l == 0) /* empty string! */ 6136 return 1; 6137 6138 /* 6139 * First, count number of arguments. Because of the previous 6140 * processing, this is just the number of blanks plus 1. 6141 */ 6142 for (i = 0, ac = 1; i < l; i++) 6143 if (index(WHITESP, arg[i]) != NULL) 6144 ac++; 6145 6146 /* 6147 * Allocate the argument list, including one entry for 6148 * the program name because getopt expects it. 6149 */ 6150 av = calloc(ac + 1, sizeof(char *)); 6151 6152 /* 6153 * Second, copy arguments from arg[] to av[]. For each one, 6154 * j is the initial character, i is the one past the end. 6155 */ 6156 for (ac = 1, i = j = 0; i < l; i++) 6157 if (index(WHITESP, arg[i]) != NULL || i == l-1) { 6158 if (i == l-1) 6159 i++; 6160 av[ac] = calloc(i-j+1, 1); 6161 bcopy(arg+j, av[ac], i-j); 6162 ac++; 6163 j = i + 1; 6164 } 6165 } else { 6166 /* 6167 * If an argument ends with ',' join with the next one. 6168 */ 6169 int first, i, l; 6170 6171 av = calloc(oldac, sizeof(char *)); 6172 for (first = i = ac = 1, l = 0; i < oldac; i++) { 6173 char *arg = oldav[i]; 6174 int k = strlen(arg); 6175 6176 l += k; 6177 if (arg[k-1] != ',' || i == oldac-1) { 6178 /* Time to copy. */ 6179 av[ac] = calloc(l+1, 1); 6180 for (l=0; first <= i; first++) { 6181 strcat(av[ac]+l, oldav[first]); 6182 l += strlen(oldav[first]); 6183 } 6184 ac++; 6185 l = 0; 6186 first = i+1; 6187 } 6188 } 6189 } 6190 6191 av[0] = strdup(oldav[0]); /* copy progname from the caller */ 6192 /* Set the force flag for non-interactive processes */ 6193 if (!do_force) 6194 do_force = !isatty(STDIN_FILENO); 6195 6196 /* Save arguments for final freeing of memory. */ 6197 save_ac = ac; 6198 save_av = av; 6199 6200 optind = optreset = 1; /* restart getopt() */ 6201 while ((ch = getopt(ac, av, "abcdefhinNqs:STtv")) != -1) 6202 switch (ch) { 6203 case 'a': 6204 do_acct = 1; 6205 break; 6206 6207 case 'b': 6208 comment_only = 1; 6209 do_compact = 1; 6210 break; 6211 6212 case 'c': 6213 do_compact = 1; 6214 break; 6215 6216 case 'd': 6217 do_dynamic = 1; 6218 break; 6219 6220 case 'e': 6221 do_expired = 1; 6222 break; 6223 6224 case 'f': 6225 do_force = 1; 6226 break; 6227 6228 case 'h': /* help */ 6229 free_args(save_ac, save_av); 6230 help(); 6231 break; /* NOTREACHED */ 6232 6233 case 'i': 6234 do_value_as_ip = 1; 6235 break; 6236 6237 case 'n': 6238 test_only = 1; 6239 break; 6240 6241 case 'N': 6242 do_resolv = 1; 6243 break; 6244 6245 case 'q': 6246 do_quiet = 1; 6247 break; 6248 6249 case 's': /* sort */ 6250 do_sort = atoi(optarg); 6251 break; 6252 6253 case 'S': 6254 show_sets = 1; 6255 break; 6256 6257 case 't': 6258 do_time = 1; 6259 break; 6260 6261 case 'T': 6262 do_time = 2; /* numeric timestamp */ 6263 break; 6264 6265 case 'v': /* verbose */ 6266 verbose = 1; 6267 break; 6268 6269 default: 6270 free_args(save_ac, save_av); 6271 return 1; 6272 } 6273 6274 ac -= optind; 6275 av += optind; 6276 NEED1("bad arguments, for usage summary ``ipfw''"); 6277 6278 /* 6279 * An undocumented behaviour of ipfw1 was to allow rule numbers first, 6280 * e.g. "100 add allow ..." instead of "add 100 allow ...". 6281 * In case, swap first and second argument to get the normal form. 6282 */ 6283 if (ac > 1 && isdigit(*av[0])) { 6284 char *p = av[0]; 6285 6286 av[0] = av[1]; 6287 av[1] = p; 6288 } 6289 6290 /* 6291 * Optional: pipe, queue or nat. 6292 */ 6293 do_nat = 0; 6294 do_pipe = 0; 6295 if (!strncmp(*av, "nat", strlen(*av))) 6296 do_nat = 1; 6297 else if (!strncmp(*av, "pipe", strlen(*av))) 6298 do_pipe = 1; 6299 else if (_substrcmp(*av, "queue") == 0) 6300 do_pipe = 2; 6301 else if (!strncmp(*av, "set", strlen(*av))) { 6302 if (ac > 1 && isdigit(av[1][0])) { 6303 use_set = strtonum(av[1], 0, RESVD_SET, &errstr); 6304 if (errstr) 6305 errx(EX_DATAERR, 6306 "invalid set number %s\n", av[1]); 6307 ac -= 2; av += 2; use_set++; 6308 } 6309 } 6310 6311 if (do_pipe || do_nat) { 6312 ac--; 6313 av++; 6314 } 6315 NEED1("missing command"); 6316 6317 /* 6318 * For pipes, queues and nats we normally say 'nat|pipe NN config' 6319 * but the code is easier to parse as 'nat|pipe config NN' 6320 * so we swap the two arguments. 6321 */ 6322 if ((do_pipe || do_nat) && ac > 1 && isdigit(*av[0])) { 6323 char *p = av[0]; 6324 6325 av[0] = av[1]; 6326 av[1] = p; 6327 } 6328 6329 int try_next = 0; 6330 if (use_set == 0) { 6331 if (_substrcmp(*av, "add") == 0) 6332 add(ac, av); 6333 else if (do_nat && _substrcmp(*av, "show") == 0) 6334 show_nat(ac, av); 6335 else if (do_pipe && _substrcmp(*av, "config") == 0) 6336 config_pipe(ac, av); 6337 else if (do_nat && _substrcmp(*av, "config") == 0) 6338 config_nat(ac, av); 6339 else if (_substrcmp(*av, "set") == 0) 6340 sets_handler(ac, av); 6341 else if (_substrcmp(*av, "table") == 0) 6342 table_handler(ac, av); 6343 else if (_substrcmp(*av, "enable") == 0) 6344 sysctl_handler(ac, av, 1); 6345 else if (_substrcmp(*av, "disable") == 0) 6346 sysctl_handler(ac, av, 0); 6347 else 6348 try_next = 1; 6349 } 6350 6351 if (use_set || try_next) { 6352 if (_substrcmp(*av, "delete") == 0) 6353 delete(ac, av); 6354 else if (_substrcmp(*av, "flush") == 0) 6355 flush(do_force); 6356 else if (_substrcmp(*av, "zero") == 0) 6357 zero(ac, av, IP_FW_ZERO); 6358 else if (_substrcmp(*av, "resetlog") == 0) 6359 zero(ac, av, IP_FW_RESETLOG); 6360 else if (_substrcmp(*av, "print") == 0 || 6361 _substrcmp(*av, "list") == 0) 6362 list(ac, av, do_acct); 6363 else if (_substrcmp(*av, "show") == 0) 6364 list(ac, av, 1 /* show counters */); 6365 else 6366 errx(EX_USAGE, "bad command `%s'", *av); 6367 } 6368 6369 /* Free memory allocated in the argument parsing. */ 6370 free_args(save_ac, save_av); 6371 return 0; 6372} 6373 6374 6375static void 6376ipfw_readfile(int ac, char *av[]) 6377{ 6378#define MAX_ARGS 32 6379 char buf[BUFSIZ]; 6380 const char *progname = av[0]; /* original program name */ 6381 const char *cmd = NULL; /* preprocessor name, if any */ 6382 const char *filename = av[ac-1]; /* file to read */ 6383 int c, lineno=0; 6384 FILE *f = NULL; 6385 pid_t preproc = 0; 6386 6387 while ((c = getopt(ac, av, "cfNnp:qS")) != -1) { 6388 switch(c) { 6389 case 'c': 6390 do_compact = 1; 6391 break; 6392 6393 case 'f': 6394 do_force = 1; 6395 break; 6396 6397 case 'N': 6398 do_resolv = 1; 6399 break; 6400 6401 case 'n': 6402 test_only = 1; 6403 break; 6404 6405 case 'p': 6406 /* 6407 * ipfw -p cmd [args] filename 6408 * 6409 * We are done with getopt(). All arguments 6410 * except the filename go to the preprocessor, 6411 * so we need to do the following: 6412 * - check that a filename is actually present; 6413 * - advance av by optind-1 to skip arguments 6414 * already processed; 6415 * - decrease ac by optind, to remove the args 6416 * already processed and the final filename; 6417 * - set the last entry in av[] to NULL so 6418 * popen() can detect the end of the array; 6419 * - set optind=ac to let getopt() terminate. 6420 */ 6421 if (optind == ac) 6422 errx(EX_USAGE, "no filename argument"); 6423 cmd = optarg; 6424 av[ac-1] = NULL; 6425 av += optind - 1; 6426 ac -= optind; 6427 optind = ac; 6428 break; 6429 6430 case 'q': 6431 do_quiet = 1; 6432 break; 6433 6434 case 'S': 6435 show_sets = 1; 6436 break; 6437 6438 default: 6439 errx(EX_USAGE, "bad arguments, for usage" 6440 " summary ``ipfw''"); 6441 } 6442 6443 } 6444 6445 if (cmd == NULL && ac != optind + 1) { 6446 fprintf(stderr, "ac %d, optind %d\n", ac, optind); 6447 errx(EX_USAGE, "extraneous filename arguments"); 6448 } 6449 6450 if ((f = fopen(filename, "r")) == NULL) 6451 err(EX_UNAVAILABLE, "fopen: %s", filename); 6452 6453 if (cmd != NULL) { /* pipe through preprocessor */ 6454 int pipedes[2]; 6455 6456 if (pipe(pipedes) == -1) 6457 err(EX_OSERR, "cannot create pipe"); 6458 6459 preproc = fork(); 6460 if (preproc == -1) 6461 err(EX_OSERR, "cannot fork"); 6462 6463 if (preproc == 0) { 6464 /* 6465 * Child, will run the preprocessor with the 6466 * file on stdin and the pipe on stdout. 6467 */ 6468 if (dup2(fileno(f), 0) == -1 6469 || dup2(pipedes[1], 1) == -1) 6470 err(EX_OSERR, "dup2()"); 6471 fclose(f); 6472 close(pipedes[1]); 6473 close(pipedes[0]); 6474 execvp(cmd, av); 6475 err(EX_OSERR, "execvp(%s) failed", cmd); 6476 } else { /* parent, will reopen f as the pipe */ 6477 fclose(f); 6478 close(pipedes[1]); 6479 if ((f = fdopen(pipedes[0], "r")) == NULL) { 6480 int savederrno = errno; 6481 6482 (void)kill(preproc, SIGTERM); 6483 errno = savederrno; 6484 err(EX_OSERR, "fdopen()"); 6485 } 6486 } 6487 } 6488 6489 while (fgets(buf, BUFSIZ, f)) { /* read commands */ 6490 char linename[10]; 6491 char *args[2]; 6492 6493 lineno++; 6494 sprintf(linename, "Line %d", lineno); 6495 setprogname(linename); /* XXX */ 6496 args[0] = strdup(progname); 6497 args[1] = buf; 6498 ipfw_main(2, args); 6499 } 6500 fclose(f); 6501 if (cmd != NULL) { 6502 int status; 6503 6504 if (waitpid(preproc, &status, 0) == -1) 6505 errx(EX_OSERR, "waitpid()"); 6506 if (WIFEXITED(status) && WEXITSTATUS(status) != EX_OK) 6507 errx(EX_UNAVAILABLE, 6508 "preprocessor exited with status %d", 6509 WEXITSTATUS(status)); 6510 else if (WIFSIGNALED(status)) 6511 errx(EX_UNAVAILABLE, 6512 "preprocessor exited with signal %d", 6513 WTERMSIG(status)); 6514 } 6515} 6516 6517int 6518main(int ac, char *av[]) 6519{ 6520 /* 6521 * If the last argument is an absolute pathname, interpret it 6522 * as a file to be preprocessed. 6523 */ 6524 6525 if (ac > 1 && av[ac - 1][0] == '/' && access(av[ac - 1], R_OK) == 0) 6526 ipfw_readfile(ac, av); 6527 else { 6528 if (ipfw_main(ac, av)) 6529 show_usage(); 6530 } 6531 return EX_OK; 6532} 6533