ipfw2.c revision 169245
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 169245 2007-05-04 11:15:41Z bz $ 21 */ 22 23#include <sys/param.h> 24#include <sys/mbuf.h> 25#include <sys/socket.h> 26#include <sys/sockio.h> 27#include <sys/sysctl.h> 28#include <sys/time.h> 29#include <sys/wait.h> 30#include <sys/queue.h> 31 32#include <ctype.h> 33#include <err.h> 34#include <errno.h> 35#include <grp.h> 36#include <limits.h> 37#include <netdb.h> 38#include <pwd.h> 39#include <signal.h> 40#include <stdio.h> 41#include <stdlib.h> 42#include <stdarg.h> 43#include <string.h> 44#include <timeconv.h> /* XXX do we need this ? */ 45#include <unistd.h> 46#include <sysexits.h> 47#include <unistd.h> 48#include <fcntl.h> 49 50#include <net/if.h> 51#include <net/if_dl.h> 52#include <net/pfvar.h> 53#include <net/route.h> /* def. of struct route */ 54#include <netinet/in.h> 55#include <netinet/in_systm.h> 56#include <netinet/ip.h> 57#include <netinet/ip_icmp.h> 58#include <netinet/icmp6.h> 59#include <netinet/ip_fw.h> 60#include <netinet/ip_dummynet.h> 61#include <netinet/tcp.h> 62#include <arpa/inet.h> 63#include <alias.h> 64 65int 66 do_resolv, /* Would try to resolve all */ 67 do_time, /* Show time stamps */ 68 do_quiet, /* Be quiet in add and flush */ 69 do_pipe, /* this cmd refers to a pipe */ 70 do_nat, /* Nat configuration. */ 71 do_sort, /* field to sort results (0 = no) */ 72 do_dynamic, /* display dynamic rules */ 73 do_expired, /* display expired dynamic rules */ 74 do_compact, /* show rules in compact mode */ 75 do_force, /* do not ask for confirmation */ 76 show_sets, /* display rule sets */ 77 test_only, /* only check syntax */ 78 comment_only, /* only print action and comment */ 79 verbose; 80 81#define IP_MASK_ALL 0xffffffff 82/* 83 * the following macro returns an error message if we run out of 84 * arguments. 85 */ 86#define NEED1(msg) {if (!ac) errx(EX_USAGE, msg);} 87 88#define GET_UINT_ARG(arg, min, max, tok, s_x) do { \ 89 if (!ac) \ 90 errx(EX_USAGE, "%s: missing argument", match_value(s_x, tok)); \ 91 if (_substrcmp(*av, "tablearg") == 0) { \ 92 arg = IP_FW_TABLEARG; \ 93 break; \ 94 } \ 95 \ 96 { \ 97 long val; \ 98 char *end; \ 99 \ 100 val = strtol(*av, &end, 10); \ 101 \ 102 if (!isdigit(**av) || *end != '\0' || (val == 0 && errno == EINVAL)) \ 103 errx(EX_DATAERR, "%s: invalid argument: %s", \ 104 match_value(s_x, tok), *av); \ 105 \ 106 if (errno == ERANGE || val < min || val > max) \ 107 errx(EX_DATAERR, "%s: argument is out of range (%u..%u): %s", \ 108 match_value(s_x, tok), min, max, *av); \ 109 \ 110 if (val == IP_FW_TABLEARG) \ 111 errx(EX_DATAERR, "%s: illegal argument value: %s", \ 112 match_value(s_x, tok), *av); \ 113 arg = val; \ 114 } \ 115} while (0) 116 117#define PRINT_UINT_ARG(str, arg) do { \ 118 if (str != NULL) \ 119 printf("%s",str); \ 120 if (arg == IP_FW_TABLEARG) \ 121 printf("tablearg"); \ 122 else \ 123 printf("%u", (uint32_t)arg); \ 124} while (0) 125 126/* 127 * _s_x is a structure that stores a string <-> token pairs, used in 128 * various places in the parser. Entries are stored in arrays, 129 * with an entry with s=NULL as terminator. 130 * The search routines are match_token() and match_value(). 131 * Often, an element with x=0 contains an error string. 132 * 133 */ 134struct _s_x { 135 char const *s; 136 int x; 137}; 138 139static struct _s_x f_tcpflags[] = { 140 { "syn", TH_SYN }, 141 { "fin", TH_FIN }, 142 { "ack", TH_ACK }, 143 { "psh", TH_PUSH }, 144 { "rst", TH_RST }, 145 { "urg", TH_URG }, 146 { "tcp flag", 0 }, 147 { NULL, 0 } 148}; 149 150static struct _s_x f_tcpopts[] = { 151 { "mss", IP_FW_TCPOPT_MSS }, 152 { "maxseg", IP_FW_TCPOPT_MSS }, 153 { "window", IP_FW_TCPOPT_WINDOW }, 154 { "sack", IP_FW_TCPOPT_SACK }, 155 { "ts", IP_FW_TCPOPT_TS }, 156 { "timestamp", IP_FW_TCPOPT_TS }, 157 { "cc", IP_FW_TCPOPT_CC }, 158 { "tcp option", 0 }, 159 { NULL, 0 } 160}; 161 162/* 163 * IP options span the range 0 to 255 so we need to remap them 164 * (though in fact only the low 5 bits are significant). 165 */ 166static struct _s_x f_ipopts[] = { 167 { "ssrr", IP_FW_IPOPT_SSRR}, 168 { "lsrr", IP_FW_IPOPT_LSRR}, 169 { "rr", IP_FW_IPOPT_RR}, 170 { "ts", IP_FW_IPOPT_TS}, 171 { "ip option", 0 }, 172 { NULL, 0 } 173}; 174 175static struct _s_x f_iptos[] = { 176 { "lowdelay", IPTOS_LOWDELAY}, 177 { "throughput", IPTOS_THROUGHPUT}, 178 { "reliability", IPTOS_RELIABILITY}, 179 { "mincost", IPTOS_MINCOST}, 180 { "congestion", IPTOS_CE}, 181 { "ecntransport", IPTOS_ECT}, 182 { "ip tos option", 0}, 183 { NULL, 0 } 184}; 185 186static struct _s_x limit_masks[] = { 187 {"all", DYN_SRC_ADDR|DYN_SRC_PORT|DYN_DST_ADDR|DYN_DST_PORT}, 188 {"src-addr", DYN_SRC_ADDR}, 189 {"src-port", DYN_SRC_PORT}, 190 {"dst-addr", DYN_DST_ADDR}, 191 {"dst-port", DYN_DST_PORT}, 192 {NULL, 0} 193}; 194 195/* 196 * we use IPPROTO_ETHERTYPE as a fake protocol id to call the print routines 197 * This is only used in this code. 198 */ 199#define IPPROTO_ETHERTYPE 0x1000 200static struct _s_x ether_types[] = { 201 /* 202 * Note, we cannot use "-:&/" in the names because they are field 203 * separators in the type specifications. Also, we use s = NULL as 204 * end-delimiter, because a type of 0 can be legal. 205 */ 206 { "ip", 0x0800 }, 207 { "ipv4", 0x0800 }, 208 { "ipv6", 0x86dd }, 209 { "arp", 0x0806 }, 210 { "rarp", 0x8035 }, 211 { "vlan", 0x8100 }, 212 { "loop", 0x9000 }, 213 { "trail", 0x1000 }, 214 { "at", 0x809b }, 215 { "atalk", 0x809b }, 216 { "aarp", 0x80f3 }, 217 { "pppoe_disc", 0x8863 }, 218 { "pppoe_sess", 0x8864 }, 219 { "ipx_8022", 0x00E0 }, 220 { "ipx_8023", 0x0000 }, 221 { "ipx_ii", 0x8137 }, 222 { "ipx_snap", 0x8137 }, 223 { "ipx", 0x8137 }, 224 { "ns", 0x0600 }, 225 { NULL, 0 } 226}; 227 228static void show_usage(void); 229 230enum tokens { 231 TOK_NULL=0, 232 233 TOK_OR, 234 TOK_NOT, 235 TOK_STARTBRACE, 236 TOK_ENDBRACE, 237 238 TOK_ACCEPT, 239 TOK_COUNT, 240 TOK_PIPE, 241 TOK_QUEUE, 242 TOK_DIVERT, 243 TOK_TEE, 244 TOK_NETGRAPH, 245 TOK_NGTEE, 246 TOK_FORWARD, 247 TOK_SKIPTO, 248 TOK_DENY, 249 TOK_REJECT, 250 TOK_RESET, 251 TOK_UNREACH, 252 TOK_CHECKSTATE, 253 TOK_NAT, 254 255 TOK_ALTQ, 256 TOK_LOG, 257 TOK_TAG, 258 TOK_UNTAG, 259 260 TOK_TAGGED, 261 TOK_UID, 262 TOK_GID, 263 TOK_JAIL, 264 TOK_IN, 265 TOK_LIMIT, 266 TOK_KEEPSTATE, 267 TOK_LAYER2, 268 TOK_OUT, 269 TOK_DIVERTED, 270 TOK_DIVERTEDLOOPBACK, 271 TOK_DIVERTEDOUTPUT, 272 TOK_XMIT, 273 TOK_RECV, 274 TOK_VIA, 275 TOK_FRAG, 276 TOK_IPOPTS, 277 TOK_IPLEN, 278 TOK_IPID, 279 TOK_IPPRECEDENCE, 280 TOK_IPTOS, 281 TOK_IPTTL, 282 TOK_IPVER, 283 TOK_ESTAB, 284 TOK_SETUP, 285 TOK_TCPDATALEN, 286 TOK_TCPFLAGS, 287 TOK_TCPOPTS, 288 TOK_TCPSEQ, 289 TOK_TCPACK, 290 TOK_TCPWIN, 291 TOK_ICMPTYPES, 292 TOK_MAC, 293 TOK_MACTYPE, 294 TOK_VERREVPATH, 295 TOK_VERSRCREACH, 296 TOK_ANTISPOOF, 297 TOK_IPSEC, 298 TOK_COMMENT, 299 300 TOK_PLR, 301 TOK_NOERROR, 302 TOK_BUCKETS, 303 TOK_DSTIP, 304 TOK_SRCIP, 305 TOK_DSTPORT, 306 TOK_SRCPORT, 307 TOK_ALL, 308 TOK_MASK, 309 TOK_BW, 310 TOK_DELAY, 311 TOK_RED, 312 TOK_GRED, 313 TOK_DROPTAIL, 314 TOK_PROTO, 315 TOK_WEIGHT, 316 TOK_IP, 317 TOK_IF, 318 TOK_ALOG, 319 TOK_DENY_INC, 320 TOK_SAME_PORTS, 321 TOK_UNREG_ONLY, 322 TOK_RESET_ADDR, 323 TOK_ALIAS_REV, 324 TOK_PROXY_ONLY, 325 TOK_REDIR_ADDR, 326 TOK_REDIR_PORT, 327 TOK_REDIR_PROTO, 328 329 TOK_IPV6, 330 TOK_FLOWID, 331 TOK_ICMP6TYPES, 332 TOK_EXT6HDR, 333 TOK_DSTIP6, 334 TOK_SRCIP6, 335 336 TOK_IPV4, 337 TOK_UNREACH6, 338 TOK_RESET6, 339}; 340 341struct _s_x dummynet_params[] = { 342 { "plr", TOK_PLR }, 343 { "noerror", TOK_NOERROR }, 344 { "buckets", TOK_BUCKETS }, 345 { "dst-ip", TOK_DSTIP }, 346 { "src-ip", TOK_SRCIP }, 347 { "dst-port", TOK_DSTPORT }, 348 { "src-port", TOK_SRCPORT }, 349 { "proto", TOK_PROTO }, 350 { "weight", TOK_WEIGHT }, 351 { "all", TOK_ALL }, 352 { "mask", TOK_MASK }, 353 { "droptail", TOK_DROPTAIL }, 354 { "red", TOK_RED }, 355 { "gred", TOK_GRED }, 356 { "bw", TOK_BW }, 357 { "bandwidth", TOK_BW }, 358 { "delay", TOK_DELAY }, 359 { "pipe", TOK_PIPE }, 360 { "queue", TOK_QUEUE }, 361 { "flow-id", TOK_FLOWID}, 362 { "dst-ipv6", TOK_DSTIP6}, 363 { "dst-ip6", TOK_DSTIP6}, 364 { "src-ipv6", TOK_SRCIP6}, 365 { "src-ip6", TOK_SRCIP6}, 366 { "dummynet-params", TOK_NULL }, 367 { NULL, 0 } /* terminator */ 368}; 369 370struct _s_x nat_params[] = { 371 { "ip", TOK_IP }, 372 { "if", TOK_IF }, 373 { "log", TOK_ALOG }, 374 { "deny_in", TOK_DENY_INC }, 375 { "same_ports", TOK_SAME_PORTS }, 376 { "unreg_only", TOK_UNREG_ONLY }, 377 { "reset", TOK_RESET_ADDR }, 378 { "reverse", TOK_ALIAS_REV }, 379 { "proxy_only", TOK_PROXY_ONLY }, 380 { "redirect_addr", TOK_REDIR_ADDR }, 381 { "redirect_port", TOK_REDIR_PORT }, 382 { "redirect_proto", TOK_REDIR_PROTO }, 383 { NULL, 0 } /* terminator */ 384}; 385 386struct _s_x rule_actions[] = { 387 { "accept", TOK_ACCEPT }, 388 { "pass", TOK_ACCEPT }, 389 { "allow", TOK_ACCEPT }, 390 { "permit", TOK_ACCEPT }, 391 { "count", TOK_COUNT }, 392 { "pipe", TOK_PIPE }, 393 { "queue", TOK_QUEUE }, 394 { "divert", TOK_DIVERT }, 395 { "tee", TOK_TEE }, 396 { "netgraph", TOK_NETGRAPH }, 397 { "ngtee", TOK_NGTEE }, 398 { "fwd", TOK_FORWARD }, 399 { "forward", TOK_FORWARD }, 400 { "skipto", TOK_SKIPTO }, 401 { "deny", TOK_DENY }, 402 { "drop", TOK_DENY }, 403 { "reject", TOK_REJECT }, 404 { "reset6", TOK_RESET6 }, 405 { "reset", TOK_RESET }, 406 { "unreach6", TOK_UNREACH6 }, 407 { "unreach", TOK_UNREACH }, 408 { "check-state", TOK_CHECKSTATE }, 409 { "//", TOK_COMMENT }, 410 { "nat", TOK_NAT }, 411 { NULL, 0 } /* terminator */ 412}; 413 414struct _s_x rule_action_params[] = { 415 { "altq", TOK_ALTQ }, 416 { "log", TOK_LOG }, 417 { "tag", TOK_TAG }, 418 { "untag", TOK_UNTAG }, 419 { NULL, 0 } /* terminator */ 420}; 421 422struct _s_x rule_options[] = { 423 { "tagged", TOK_TAGGED }, 424 { "uid", TOK_UID }, 425 { "gid", TOK_GID }, 426 { "jail", TOK_JAIL }, 427 { "in", TOK_IN }, 428 { "limit", TOK_LIMIT }, 429 { "keep-state", TOK_KEEPSTATE }, 430 { "bridged", TOK_LAYER2 }, 431 { "layer2", TOK_LAYER2 }, 432 { "out", TOK_OUT }, 433 { "diverted", TOK_DIVERTED }, 434 { "diverted-loopback", TOK_DIVERTEDLOOPBACK }, 435 { "diverted-output", TOK_DIVERTEDOUTPUT }, 436 { "xmit", TOK_XMIT }, 437 { "recv", TOK_RECV }, 438 { "via", TOK_VIA }, 439 { "fragment", TOK_FRAG }, 440 { "frag", TOK_FRAG }, 441 { "ipoptions", TOK_IPOPTS }, 442 { "ipopts", TOK_IPOPTS }, 443 { "iplen", TOK_IPLEN }, 444 { "ipid", TOK_IPID }, 445 { "ipprecedence", TOK_IPPRECEDENCE }, 446 { "iptos", TOK_IPTOS }, 447 { "ipttl", TOK_IPTTL }, 448 { "ipversion", TOK_IPVER }, 449 { "ipver", TOK_IPVER }, 450 { "estab", TOK_ESTAB }, 451 { "established", TOK_ESTAB }, 452 { "setup", TOK_SETUP }, 453 { "tcpdatalen", TOK_TCPDATALEN }, 454 { "tcpflags", TOK_TCPFLAGS }, 455 { "tcpflgs", TOK_TCPFLAGS }, 456 { "tcpoptions", TOK_TCPOPTS }, 457 { "tcpopts", TOK_TCPOPTS }, 458 { "tcpseq", TOK_TCPSEQ }, 459 { "tcpack", TOK_TCPACK }, 460 { "tcpwin", TOK_TCPWIN }, 461 { "icmptype", TOK_ICMPTYPES }, 462 { "icmptypes", TOK_ICMPTYPES }, 463 { "dst-ip", TOK_DSTIP }, 464 { "src-ip", TOK_SRCIP }, 465 { "dst-port", TOK_DSTPORT }, 466 { "src-port", TOK_SRCPORT }, 467 { "proto", TOK_PROTO }, 468 { "MAC", TOK_MAC }, 469 { "mac", TOK_MAC }, 470 { "mac-type", TOK_MACTYPE }, 471 { "verrevpath", TOK_VERREVPATH }, 472 { "versrcreach", TOK_VERSRCREACH }, 473 { "antispoof", TOK_ANTISPOOF }, 474 { "ipsec", TOK_IPSEC }, 475 { "icmp6type", TOK_ICMP6TYPES }, 476 { "icmp6types", TOK_ICMP6TYPES }, 477 { "ext6hdr", TOK_EXT6HDR}, 478 { "flow-id", TOK_FLOWID}, 479 { "ipv6", TOK_IPV6}, 480 { "ip6", TOK_IPV6}, 481 { "ipv4", TOK_IPV4}, 482 { "ip4", TOK_IPV4}, 483 { "dst-ipv6", TOK_DSTIP6}, 484 { "dst-ip6", TOK_DSTIP6}, 485 { "src-ipv6", TOK_SRCIP6}, 486 { "src-ip6", TOK_SRCIP6}, 487 { "//", TOK_COMMENT }, 488 489 { "not", TOK_NOT }, /* pseudo option */ 490 { "!", /* escape ? */ TOK_NOT }, /* pseudo option */ 491 { "or", TOK_OR }, /* pseudo option */ 492 { "|", /* escape */ TOK_OR }, /* pseudo option */ 493 { "{", TOK_STARTBRACE }, /* pseudo option */ 494 { "(", TOK_STARTBRACE }, /* pseudo option */ 495 { "}", TOK_ENDBRACE }, /* pseudo option */ 496 { ")", TOK_ENDBRACE }, /* pseudo option */ 497 { NULL, 0 } /* terminator */ 498}; 499 500#define TABLEARG "tablearg" 501 502static __inline uint64_t 503align_uint64(uint64_t *pll) { 504 uint64_t ret; 505 506 bcopy (pll, &ret, sizeof(ret)); 507 return ret; 508} 509 510/* 511 * conditionally runs the command. 512 */ 513static int 514do_cmd(int optname, void *optval, uintptr_t optlen) 515{ 516 static int s = -1; /* the socket */ 517 int i; 518 519 if (test_only) 520 return 0; 521 522 if (s == -1) 523 s = socket(AF_INET, SOCK_RAW, IPPROTO_RAW); 524 if (s < 0) 525 err(EX_UNAVAILABLE, "socket"); 526 527 if (optname == IP_FW_GET || optname == IP_DUMMYNET_GET || 528 optname == IP_FW_ADD || optname == IP_FW_TABLE_LIST || 529 optname == IP_FW_TABLE_GETSIZE || 530 optname == IP_FW_NAT_GET_CONFIG || 531 optname == IP_FW_NAT_GET_LOG) 532 i = getsockopt(s, IPPROTO_IP, optname, optval, 533 (socklen_t *)optlen); 534 else 535 i = setsockopt(s, IPPROTO_IP, optname, optval, optlen); 536 return i; 537} 538 539/** 540 * match_token takes a table and a string, returns the value associated 541 * with the string (-1 in case of failure). 542 */ 543static int 544match_token(struct _s_x *table, char *string) 545{ 546 struct _s_x *pt; 547 uint i = strlen(string); 548 549 for (pt = table ; i && pt->s != NULL ; pt++) 550 if (strlen(pt->s) == i && !bcmp(string, pt->s, i)) 551 return pt->x; 552 return -1; 553} 554 555/** 556 * match_value takes a table and a value, returns the string associated 557 * with the value (NULL in case of failure). 558 */ 559static char const * 560match_value(struct _s_x *p, int value) 561{ 562 for (; p->s != NULL; p++) 563 if (p->x == value) 564 return p->s; 565 return NULL; 566} 567 568/* 569 * _substrcmp takes two strings and returns 1 if they do not match, 570 * and 0 if they match exactly or the first string is a sub-string 571 * of the second. A warning is printed to stderr in the case that the 572 * first string is a sub-string of the second. 573 * 574 * This function will be removed in the future through the usual 575 * deprecation process. 576 */ 577static int 578_substrcmp(const char *str1, const char* str2) 579{ 580 581 if (strncmp(str1, str2, strlen(str1)) != 0) 582 return 1; 583 584 if (strlen(str1) != strlen(str2)) 585 warnx("DEPRECATED: '%s' matched '%s' as a sub-string", 586 str1, str2); 587 return 0; 588} 589 590/* 591 * _substrcmp2 takes three strings and returns 1 if the first two do not match, 592 * and 0 if they match exactly or the second string is a sub-string 593 * of the first. A warning is printed to stderr in the case that the 594 * first string does not match the third. 595 * 596 * This function exists to warn about the bizzare construction 597 * strncmp(str, "by", 2) which is used to allow people to use a shotcut 598 * for "bytes". The problem is that in addition to accepting "by", 599 * "byt", "byte", and "bytes", it also excepts "by_rabid_dogs" and any 600 * other string beginning with "by". 601 * 602 * This function will be removed in the future through the usual 603 * deprecation process. 604 */ 605static int 606_substrcmp2(const char *str1, const char* str2, const char* str3) 607{ 608 609 if (strncmp(str1, str2, strlen(str2)) != 0) 610 return 1; 611 612 if (strcmp(str1, str3) != 0) 613 warnx("DEPRECATED: '%s' matched '%s'", 614 str1, str3); 615 return 0; 616} 617 618/* 619 * prints one port, symbolic or numeric 620 */ 621static void 622print_port(int proto, uint16_t port) 623{ 624 625 if (proto == IPPROTO_ETHERTYPE) { 626 char const *s; 627 628 if (do_resolv && (s = match_value(ether_types, port)) ) 629 printf("%s", s); 630 else 631 printf("0x%04x", port); 632 } else { 633 struct servent *se = NULL; 634 if (do_resolv) { 635 struct protoent *pe = getprotobynumber(proto); 636 637 se = getservbyport(htons(port), pe ? pe->p_name : NULL); 638 } 639 if (se) 640 printf("%s", se->s_name); 641 else 642 printf("%d", port); 643 } 644} 645 646struct _s_x _port_name[] = { 647 {"dst-port", O_IP_DSTPORT}, 648 {"src-port", O_IP_SRCPORT}, 649 {"ipid", O_IPID}, 650 {"iplen", O_IPLEN}, 651 {"ipttl", O_IPTTL}, 652 {"mac-type", O_MAC_TYPE}, 653 {"tcpdatalen", O_TCPDATALEN}, 654 {"tagged", O_TAGGED}, 655 {NULL, 0} 656}; 657 658/* 659 * Print the values in a list 16-bit items of the types above. 660 * XXX todo: add support for mask. 661 */ 662static void 663print_newports(ipfw_insn_u16 *cmd, int proto, int opcode) 664{ 665 uint16_t *p = cmd->ports; 666 int i; 667 char const *sep; 668 669 if (cmd->o.len & F_NOT) 670 printf(" not"); 671 if (opcode != 0) { 672 sep = match_value(_port_name, opcode); 673 if (sep == NULL) 674 sep = "???"; 675 printf (" %s", sep); 676 } 677 sep = " "; 678 for (i = F_LEN((ipfw_insn *)cmd) - 1; i > 0; i--, p += 2) { 679 printf(sep); 680 print_port(proto, p[0]); 681 if (p[0] != p[1]) { 682 printf("-"); 683 print_port(proto, p[1]); 684 } 685 sep = ","; 686 } 687} 688 689/* 690 * Like strtol, but also translates service names into port numbers 691 * for some protocols. 692 * In particular: 693 * proto == -1 disables the protocol check; 694 * proto == IPPROTO_ETHERTYPE looks up an internal table 695 * proto == <some value in /etc/protocols> matches the values there. 696 * Returns *end == s in case the parameter is not found. 697 */ 698static int 699strtoport(char *s, char **end, int base, int proto) 700{ 701 char *p, *buf; 702 char *s1; 703 int i; 704 705 *end = s; /* default - not found */ 706 if (*s == '\0') 707 return 0; /* not found */ 708 709 if (isdigit(*s)) 710 return strtol(s, end, base); 711 712 /* 713 * find separator. '\\' escapes the next char. 714 */ 715 for (s1 = s; *s1 && (isalnum(*s1) || *s1 == '\\') ; s1++) 716 if (*s1 == '\\' && s1[1] != '\0') 717 s1++; 718 719 buf = malloc(s1 - s + 1); 720 if (buf == NULL) 721 return 0; 722 723 /* 724 * copy into a buffer skipping backslashes 725 */ 726 for (p = s, i = 0; p != s1 ; p++) 727 if (*p != '\\') 728 buf[i++] = *p; 729 buf[i++] = '\0'; 730 731 if (proto == IPPROTO_ETHERTYPE) { 732 i = match_token(ether_types, buf); 733 free(buf); 734 if (i != -1) { /* found */ 735 *end = s1; 736 return i; 737 } 738 } else { 739 struct protoent *pe = NULL; 740 struct servent *se; 741 742 if (proto != 0) 743 pe = getprotobynumber(proto); 744 setservent(1); 745 se = getservbyname(buf, pe ? pe->p_name : NULL); 746 free(buf); 747 if (se != NULL) { 748 *end = s1; 749 return ntohs(se->s_port); 750 } 751 } 752 return 0; /* not found */ 753} 754 755/* 756 * Map between current altq queue id numbers and names. 757 */ 758static int altq_fetched = 0; 759static TAILQ_HEAD(, pf_altq) altq_entries = 760 TAILQ_HEAD_INITIALIZER(altq_entries); 761 762static void 763altq_set_enabled(int enabled) 764{ 765 int pffd; 766 767 pffd = open("/dev/pf", O_RDWR); 768 if (pffd == -1) 769 err(EX_UNAVAILABLE, 770 "altq support opening pf(4) control device"); 771 if (enabled) { 772 if (ioctl(pffd, DIOCSTARTALTQ) != 0 && errno != EEXIST) 773 err(EX_UNAVAILABLE, "enabling altq"); 774 } else { 775 if (ioctl(pffd, DIOCSTOPALTQ) != 0 && errno != ENOENT) 776 err(EX_UNAVAILABLE, "disabling altq"); 777 } 778 close(pffd); 779} 780 781static void 782altq_fetch() 783{ 784 struct pfioc_altq pfioc; 785 struct pf_altq *altq; 786 int pffd, mnr; 787 788 if (altq_fetched) 789 return; 790 altq_fetched = 1; 791 pffd = open("/dev/pf", O_RDONLY); 792 if (pffd == -1) { 793 warn("altq support opening pf(4) control device"); 794 return; 795 } 796 bzero(&pfioc, sizeof(pfioc)); 797 if (ioctl(pffd, DIOCGETALTQS, &pfioc) != 0) { 798 warn("altq support getting queue list"); 799 close(pffd); 800 return; 801 } 802 mnr = pfioc.nr; 803 for (pfioc.nr = 0; pfioc.nr < mnr; pfioc.nr++) { 804 if (ioctl(pffd, DIOCGETALTQ, &pfioc) != 0) { 805 if (errno == EBUSY) 806 break; 807 warn("altq support getting queue list"); 808 close(pffd); 809 return; 810 } 811 if (pfioc.altq.qid == 0) 812 continue; 813 altq = malloc(sizeof(*altq)); 814 if (altq == NULL) 815 err(EX_OSERR, "malloc"); 816 *altq = pfioc.altq; 817 TAILQ_INSERT_TAIL(&altq_entries, altq, entries); 818 } 819 close(pffd); 820} 821 822static u_int32_t 823altq_name_to_qid(const char *name) 824{ 825 struct pf_altq *altq; 826 827 altq_fetch(); 828 TAILQ_FOREACH(altq, &altq_entries, entries) 829 if (strcmp(name, altq->qname) == 0) 830 break; 831 if (altq == NULL) 832 errx(EX_DATAERR, "altq has no queue named `%s'", name); 833 return altq->qid; 834} 835 836static const char * 837altq_qid_to_name(u_int32_t qid) 838{ 839 struct pf_altq *altq; 840 841 altq_fetch(); 842 TAILQ_FOREACH(altq, &altq_entries, entries) 843 if (qid == altq->qid) 844 break; 845 if (altq == NULL) 846 return NULL; 847 return altq->qname; 848} 849 850static void 851fill_altq_qid(u_int32_t *qid, const char *av) 852{ 853 *qid = altq_name_to_qid(av); 854} 855 856/* 857 * Fill the body of the command with the list of port ranges. 858 */ 859static int 860fill_newports(ipfw_insn_u16 *cmd, char *av, int proto) 861{ 862 uint16_t a, b, *p = cmd->ports; 863 int i = 0; 864 char *s = av; 865 866 while (*s) { 867 a = strtoport(av, &s, 0, proto); 868 if (s == av) /* empty or invalid argument */ 869 return (0); 870 871 switch (*s) { 872 case '-': /* a range */ 873 av = s + 1; 874 b = strtoport(av, &s, 0, proto); 875 /* Reject expressions like '1-abc' or '1-2-3'. */ 876 if (s == av || (*s != ',' && *s != '\0')) 877 return (0); 878 p[0] = a; 879 p[1] = b; 880 break; 881 case ',': /* comma separated list */ 882 case '\0': 883 p[0] = p[1] = a; 884 break; 885 default: 886 warnx("port list: invalid separator <%c> in <%s>", 887 *s, av); 888 return (0); 889 } 890 891 i++; 892 p += 2; 893 av = s + 1; 894 } 895 if (i > 0) { 896 if (i + 1 > F_LEN_MASK) 897 errx(EX_DATAERR, "too many ports/ranges\n"); 898 cmd->o.len |= i + 1; /* leave F_NOT and F_OR untouched */ 899 } 900 return (i); 901} 902 903static struct _s_x icmpcodes[] = { 904 { "net", ICMP_UNREACH_NET }, 905 { "host", ICMP_UNREACH_HOST }, 906 { "protocol", ICMP_UNREACH_PROTOCOL }, 907 { "port", ICMP_UNREACH_PORT }, 908 { "needfrag", ICMP_UNREACH_NEEDFRAG }, 909 { "srcfail", ICMP_UNREACH_SRCFAIL }, 910 { "net-unknown", ICMP_UNREACH_NET_UNKNOWN }, 911 { "host-unknown", ICMP_UNREACH_HOST_UNKNOWN }, 912 { "isolated", ICMP_UNREACH_ISOLATED }, 913 { "net-prohib", ICMP_UNREACH_NET_PROHIB }, 914 { "host-prohib", ICMP_UNREACH_HOST_PROHIB }, 915 { "tosnet", ICMP_UNREACH_TOSNET }, 916 { "toshost", ICMP_UNREACH_TOSHOST }, 917 { "filter-prohib", ICMP_UNREACH_FILTER_PROHIB }, 918 { "host-precedence", ICMP_UNREACH_HOST_PRECEDENCE }, 919 { "precedence-cutoff", ICMP_UNREACH_PRECEDENCE_CUTOFF }, 920 { NULL, 0 } 921}; 922 923static void 924fill_reject_code(u_short *codep, char *str) 925{ 926 int val; 927 char *s; 928 929 val = strtoul(str, &s, 0); 930 if (s == str || *s != '\0' || val >= 0x100) 931 val = match_token(icmpcodes, str); 932 if (val < 0) 933 errx(EX_DATAERR, "unknown ICMP unreachable code ``%s''", str); 934 *codep = val; 935 return; 936} 937 938static void 939print_reject_code(uint16_t code) 940{ 941 char const *s = match_value(icmpcodes, code); 942 943 if (s != NULL) 944 printf("unreach %s", s); 945 else 946 printf("unreach %u", code); 947} 948 949static struct _s_x icmp6codes[] = { 950 { "no-route", ICMP6_DST_UNREACH_NOROUTE }, 951 { "admin-prohib", ICMP6_DST_UNREACH_ADMIN }, 952 { "address", ICMP6_DST_UNREACH_ADDR }, 953 { "port", ICMP6_DST_UNREACH_NOPORT }, 954 { NULL, 0 } 955}; 956 957static void 958fill_unreach6_code(u_short *codep, char *str) 959{ 960 int val; 961 char *s; 962 963 val = strtoul(str, &s, 0); 964 if (s == str || *s != '\0' || val >= 0x100) 965 val = match_token(icmp6codes, str); 966 if (val < 0) 967 errx(EX_DATAERR, "unknown ICMPv6 unreachable code ``%s''", str); 968 *codep = val; 969 return; 970} 971 972static void 973print_unreach6_code(uint16_t code) 974{ 975 char const *s = match_value(icmp6codes, code); 976 977 if (s != NULL) 978 printf("unreach6 %s", s); 979 else 980 printf("unreach6 %u", code); 981} 982 983/* 984 * Returns the number of bits set (from left) in a contiguous bitmask, 985 * or -1 if the mask is not contiguous. 986 * XXX this needs a proper fix. 987 * This effectively works on masks in big-endian (network) format. 988 * when compiled on little endian architectures. 989 * 990 * First bit is bit 7 of the first byte -- note, for MAC addresses, 991 * the first bit on the wire is bit 0 of the first byte. 992 * len is the max length in bits. 993 */ 994static int 995contigmask(uint8_t *p, int len) 996{ 997 int i, n; 998 999 for (i=0; i<len ; i++) 1000 if ( (p[i/8] & (1 << (7 - (i%8)))) == 0) /* first bit unset */ 1001 break; 1002 for (n=i+1; n < len; n++) 1003 if ( (p[n/8] & (1 << (7 - (n%8)))) != 0) 1004 return -1; /* mask not contiguous */ 1005 return i; 1006} 1007 1008/* 1009 * print flags set/clear in the two bitmasks passed as parameters. 1010 * There is a specialized check for f_tcpflags. 1011 */ 1012static void 1013print_flags(char const *name, ipfw_insn *cmd, struct _s_x *list) 1014{ 1015 char const *comma = ""; 1016 int i; 1017 uint8_t set = cmd->arg1 & 0xff; 1018 uint8_t clear = (cmd->arg1 >> 8) & 0xff; 1019 1020 if (list == f_tcpflags && set == TH_SYN && clear == TH_ACK) { 1021 printf(" setup"); 1022 return; 1023 } 1024 1025 printf(" %s ", name); 1026 for (i=0; list[i].x != 0; i++) { 1027 if (set & list[i].x) { 1028 set &= ~list[i].x; 1029 printf("%s%s", comma, list[i].s); 1030 comma = ","; 1031 } 1032 if (clear & list[i].x) { 1033 clear &= ~list[i].x; 1034 printf("%s!%s", comma, list[i].s); 1035 comma = ","; 1036 } 1037 } 1038} 1039 1040/* 1041 * Print the ip address contained in a command. 1042 */ 1043static void 1044print_ip(ipfw_insn_ip *cmd, char const *s) 1045{ 1046 struct hostent *he = NULL; 1047 int len = F_LEN((ipfw_insn *)cmd); 1048 uint32_t *a = ((ipfw_insn_u32 *)cmd)->d; 1049 1050 printf("%s%s ", cmd->o.len & F_NOT ? " not": "", s); 1051 1052 if (cmd->o.opcode == O_IP_SRC_ME || cmd->o.opcode == O_IP_DST_ME) { 1053 printf("me"); 1054 return; 1055 } 1056 if (cmd->o.opcode == O_IP_SRC_LOOKUP || 1057 cmd->o.opcode == O_IP_DST_LOOKUP) { 1058 printf("table(%u", ((ipfw_insn *)cmd)->arg1); 1059 if (len == F_INSN_SIZE(ipfw_insn_u32)) 1060 printf(",%u", *a); 1061 printf(")"); 1062 return; 1063 } 1064 if (cmd->o.opcode == O_IP_SRC_SET || cmd->o.opcode == O_IP_DST_SET) { 1065 uint32_t x, *map = (uint32_t *)&(cmd->mask); 1066 int i, j; 1067 char comma = '{'; 1068 1069 x = cmd->o.arg1 - 1; 1070 x = htonl( ~x ); 1071 cmd->addr.s_addr = htonl(cmd->addr.s_addr); 1072 printf("%s/%d", inet_ntoa(cmd->addr), 1073 contigmask((uint8_t *)&x, 32)); 1074 x = cmd->addr.s_addr = htonl(cmd->addr.s_addr); 1075 x &= 0xff; /* base */ 1076 /* 1077 * Print bits and ranges. 1078 * Locate first bit set (i), then locate first bit unset (j). 1079 * If we have 3+ consecutive bits set, then print them as a 1080 * range, otherwise only print the initial bit and rescan. 1081 */ 1082 for (i=0; i < cmd->o.arg1; i++) 1083 if (map[i/32] & (1<<(i & 31))) { 1084 for (j=i+1; j < cmd->o.arg1; j++) 1085 if (!(map[ j/32] & (1<<(j & 31)))) 1086 break; 1087 printf("%c%d", comma, i+x); 1088 if (j>i+2) { /* range has at least 3 elements */ 1089 printf("-%d", j-1+x); 1090 i = j-1; 1091 } 1092 comma = ','; 1093 } 1094 printf("}"); 1095 return; 1096 } 1097 /* 1098 * len == 2 indicates a single IP, whereas lists of 1 or more 1099 * addr/mask pairs have len = (2n+1). We convert len to n so we 1100 * use that to count the number of entries. 1101 */ 1102 for (len = len / 2; len > 0; len--, a += 2) { 1103 int mb = /* mask length */ 1104 (cmd->o.opcode == O_IP_SRC || cmd->o.opcode == O_IP_DST) ? 1105 32 : contigmask((uint8_t *)&(a[1]), 32); 1106 if (mb == 32 && do_resolv) 1107 he = gethostbyaddr((char *)&(a[0]), sizeof(u_long), AF_INET); 1108 if (he != NULL) /* resolved to name */ 1109 printf("%s", he->h_name); 1110 else if (mb == 0) /* any */ 1111 printf("any"); 1112 else { /* numeric IP followed by some kind of mask */ 1113 printf("%s", inet_ntoa( *((struct in_addr *)&a[0]) ) ); 1114 if (mb < 0) 1115 printf(":%s", inet_ntoa( *((struct in_addr *)&a[1]) ) ); 1116 else if (mb < 32) 1117 printf("/%d", mb); 1118 } 1119 if (len > 1) 1120 printf(","); 1121 } 1122} 1123 1124/* 1125 * prints a MAC address/mask pair 1126 */ 1127static void 1128print_mac(uint8_t *addr, uint8_t *mask) 1129{ 1130 int l = contigmask(mask, 48); 1131 1132 if (l == 0) 1133 printf(" any"); 1134 else { 1135 printf(" %02x:%02x:%02x:%02x:%02x:%02x", 1136 addr[0], addr[1], addr[2], addr[3], addr[4], addr[5]); 1137 if (l == -1) 1138 printf("&%02x:%02x:%02x:%02x:%02x:%02x", 1139 mask[0], mask[1], mask[2], 1140 mask[3], mask[4], mask[5]); 1141 else if (l < 48) 1142 printf("/%d", l); 1143 } 1144} 1145 1146static void 1147fill_icmptypes(ipfw_insn_u32 *cmd, char *av) 1148{ 1149 uint8_t type; 1150 1151 cmd->d[0] = 0; 1152 while (*av) { 1153 if (*av == ',') 1154 av++; 1155 1156 type = strtoul(av, &av, 0); 1157 1158 if (*av != ',' && *av != '\0') 1159 errx(EX_DATAERR, "invalid ICMP type"); 1160 1161 if (type > 31) 1162 errx(EX_DATAERR, "ICMP type out of range"); 1163 1164 cmd->d[0] |= 1 << type; 1165 } 1166 cmd->o.opcode = O_ICMPTYPE; 1167 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32); 1168} 1169 1170static void 1171print_icmptypes(ipfw_insn_u32 *cmd) 1172{ 1173 int i; 1174 char sep= ' '; 1175 1176 printf(" icmptypes"); 1177 for (i = 0; i < 32; i++) { 1178 if ( (cmd->d[0] & (1 << (i))) == 0) 1179 continue; 1180 printf("%c%d", sep, i); 1181 sep = ','; 1182 } 1183} 1184 1185/* 1186 * Print the ip address contained in a command. 1187 */ 1188static void 1189print_ip6(ipfw_insn_ip6 *cmd, char const *s) 1190{ 1191 struct hostent *he = NULL; 1192 int len = F_LEN((ipfw_insn *) cmd) - 1; 1193 struct in6_addr *a = &(cmd->addr6); 1194 char trad[255]; 1195 1196 printf("%s%s ", cmd->o.len & F_NOT ? " not": "", s); 1197 1198 if (cmd->o.opcode == O_IP6_SRC_ME || cmd->o.opcode == O_IP6_DST_ME) { 1199 printf("me6"); 1200 return; 1201 } 1202 if (cmd->o.opcode == O_IP6) { 1203 printf(" ip6"); 1204 return; 1205 } 1206 1207 /* 1208 * len == 4 indicates a single IP, whereas lists of 1 or more 1209 * addr/mask pairs have len = (2n+1). We convert len to n so we 1210 * use that to count the number of entries. 1211 */ 1212 1213 for (len = len / 4; len > 0; len -= 2, a += 2) { 1214 int mb = /* mask length */ 1215 (cmd->o.opcode == O_IP6_SRC || cmd->o.opcode == O_IP6_DST) ? 1216 128 : contigmask((uint8_t *)&(a[1]), 128); 1217 1218 if (mb == 128 && do_resolv) 1219 he = gethostbyaddr((char *)a, sizeof(*a), AF_INET6); 1220 if (he != NULL) /* resolved to name */ 1221 printf("%s", he->h_name); 1222 else if (mb == 0) /* any */ 1223 printf("any"); 1224 else { /* numeric IP followed by some kind of mask */ 1225 if (inet_ntop(AF_INET6, a, trad, sizeof( trad ) ) == NULL) 1226 printf("Error ntop in print_ip6\n"); 1227 printf("%s", trad ); 1228 if (mb < 0) /* XXX not really legal... */ 1229 printf(":%s", 1230 inet_ntop(AF_INET6, &a[1], trad, sizeof(trad))); 1231 else if (mb < 128) 1232 printf("/%d", mb); 1233 } 1234 if (len > 2) 1235 printf(","); 1236 } 1237} 1238 1239static void 1240fill_icmp6types(ipfw_insn_icmp6 *cmd, char *av) 1241{ 1242 uint8_t type; 1243 1244 bzero(cmd, sizeof(*cmd)); 1245 while (*av) { 1246 if (*av == ',') 1247 av++; 1248 type = strtoul(av, &av, 0); 1249 if (*av != ',' && *av != '\0') 1250 errx(EX_DATAERR, "invalid ICMP6 type"); 1251 /* 1252 * XXX: shouldn't this be 0xFF? I can't see any reason why 1253 * we shouldn't be able to filter all possiable values 1254 * regardless of the ability of the rest of the kernel to do 1255 * anything useful with them. 1256 */ 1257 if (type > ICMP6_MAXTYPE) 1258 errx(EX_DATAERR, "ICMP6 type out of range"); 1259 cmd->d[type / 32] |= ( 1 << (type % 32)); 1260 } 1261 cmd->o.opcode = O_ICMP6TYPE; 1262 cmd->o.len |= F_INSN_SIZE(ipfw_insn_icmp6); 1263} 1264 1265 1266static void 1267print_icmp6types(ipfw_insn_u32 *cmd) 1268{ 1269 int i, j; 1270 char sep= ' '; 1271 1272 printf(" ip6 icmp6types"); 1273 for (i = 0; i < 7; i++) 1274 for (j=0; j < 32; ++j) { 1275 if ( (cmd->d[i] & (1 << (j))) == 0) 1276 continue; 1277 printf("%c%d", sep, (i*32 + j)); 1278 sep = ','; 1279 } 1280} 1281 1282static void 1283print_flow6id( ipfw_insn_u32 *cmd) 1284{ 1285 uint16_t i, limit = cmd->o.arg1; 1286 char sep = ','; 1287 1288 printf(" flow-id "); 1289 for( i=0; i < limit; ++i) { 1290 if (i == limit - 1) 1291 sep = ' '; 1292 printf("%d%c", cmd->d[i], sep); 1293 } 1294} 1295 1296/* structure and define for the extension header in ipv6 */ 1297static struct _s_x ext6hdrcodes[] = { 1298 { "frag", EXT_FRAGMENT }, 1299 { "hopopt", EXT_HOPOPTS }, 1300 { "route", EXT_ROUTING }, 1301 { "dstopt", EXT_DSTOPTS }, 1302 { "ah", EXT_AH }, 1303 { "esp", EXT_ESP }, 1304 { "rthdr0", EXT_RTHDR0 }, 1305 { "rthdr2", EXT_RTHDR2 }, 1306 { NULL, 0 } 1307}; 1308 1309/* fills command for the extension header filtering */ 1310int 1311fill_ext6hdr( ipfw_insn *cmd, char *av) 1312{ 1313 int tok; 1314 char *s = av; 1315 1316 cmd->arg1 = 0; 1317 1318 while(s) { 1319 av = strsep( &s, ",") ; 1320 tok = match_token(ext6hdrcodes, av); 1321 switch (tok) { 1322 case EXT_FRAGMENT: 1323 cmd->arg1 |= EXT_FRAGMENT; 1324 break; 1325 1326 case EXT_HOPOPTS: 1327 cmd->arg1 |= EXT_HOPOPTS; 1328 break; 1329 1330 case EXT_ROUTING: 1331 cmd->arg1 |= EXT_ROUTING; 1332 break; 1333 1334 case EXT_DSTOPTS: 1335 cmd->arg1 |= EXT_DSTOPTS; 1336 break; 1337 1338 case EXT_AH: 1339 cmd->arg1 |= EXT_AH; 1340 break; 1341 1342 case EXT_ESP: 1343 cmd->arg1 |= EXT_ESP; 1344 break; 1345 1346 case EXT_RTHDR0: 1347 cmd->arg1 |= EXT_RTHDR0; 1348 break; 1349 1350 case EXT_RTHDR2: 1351 cmd->arg1 |= EXT_RTHDR2; 1352 break; 1353 1354 default: 1355 errx( EX_DATAERR, "invalid option for ipv6 exten header" ); 1356 break; 1357 } 1358 } 1359 if (cmd->arg1 == 0 ) 1360 return 0; 1361 cmd->opcode = O_EXT_HDR; 1362 cmd->len |= F_INSN_SIZE( ipfw_insn ); 1363 return 1; 1364} 1365 1366void 1367print_ext6hdr( ipfw_insn *cmd ) 1368{ 1369 char sep = ' '; 1370 1371 printf(" extension header:"); 1372 if (cmd->arg1 & EXT_FRAGMENT ) { 1373 printf("%cfragmentation", sep); 1374 sep = ','; 1375 } 1376 if (cmd->arg1 & EXT_HOPOPTS ) { 1377 printf("%chop options", sep); 1378 sep = ','; 1379 } 1380 if (cmd->arg1 & EXT_ROUTING ) { 1381 printf("%crouting options", sep); 1382 sep = ','; 1383 } 1384 if (cmd->arg1 & EXT_RTHDR0 ) { 1385 printf("%crthdr0", sep); 1386 sep = ','; 1387 } 1388 if (cmd->arg1 & EXT_RTHDR2 ) { 1389 printf("%crthdr2", sep); 1390 sep = ','; 1391 } 1392 if (cmd->arg1 & EXT_DSTOPTS ) { 1393 printf("%cdestination options", sep); 1394 sep = ','; 1395 } 1396 if (cmd->arg1 & EXT_AH ) { 1397 printf("%cauthentication header", sep); 1398 sep = ','; 1399 } 1400 if (cmd->arg1 & EXT_ESP ) { 1401 printf("%cencapsulated security payload", sep); 1402 } 1403} 1404 1405/* 1406 * show_ipfw() prints the body of an ipfw rule. 1407 * Because the standard rule has at least proto src_ip dst_ip, we use 1408 * a helper function to produce these entries if not provided explicitly. 1409 * The first argument is the list of fields we have, the second is 1410 * the list of fields we want to be printed. 1411 * 1412 * Special cases if we have provided a MAC header: 1413 * + if the rule does not contain IP addresses/ports, do not print them; 1414 * + if the rule does not contain an IP proto, print "all" instead of "ip"; 1415 * 1416 * Once we have 'have_options', IP header fields are printed as options. 1417 */ 1418#define HAVE_PROTO 0x0001 1419#define HAVE_SRCIP 0x0002 1420#define HAVE_DSTIP 0x0004 1421#define HAVE_PROTO4 0x0008 1422#define HAVE_PROTO6 0x0010 1423#define HAVE_OPTIONS 0x8000 1424 1425#define HAVE_IP (HAVE_PROTO | HAVE_SRCIP | HAVE_DSTIP) 1426static void 1427show_prerequisites(int *flags, int want, int cmd) 1428{ 1429 if (comment_only) 1430 return; 1431 if ( (*flags & HAVE_IP) == HAVE_IP) 1432 *flags |= HAVE_OPTIONS; 1433 1434 if ( !(*flags & HAVE_OPTIONS)) { 1435 if ( !(*flags & HAVE_PROTO) && (want & HAVE_PROTO)) 1436 if ( (*flags & HAVE_PROTO4)) 1437 printf(" ip4"); 1438 else if ( (*flags & HAVE_PROTO6)) 1439 printf(" ip6"); 1440 else 1441 printf(" ip"); 1442 1443 if ( !(*flags & HAVE_SRCIP) && (want & HAVE_SRCIP)) 1444 printf(" from any"); 1445 if ( !(*flags & HAVE_DSTIP) && (want & HAVE_DSTIP)) 1446 printf(" to any"); 1447 } 1448 *flags |= want; 1449} 1450 1451static void 1452show_ipfw(struct ip_fw *rule, int pcwidth, int bcwidth) 1453{ 1454 static int twidth = 0; 1455 int l; 1456 ipfw_insn *cmd, *tagptr = NULL; 1457 char *comment = NULL; /* ptr to comment if we have one */ 1458 int proto = 0; /* default */ 1459 int flags = 0; /* prerequisites */ 1460 ipfw_insn_log *logptr = NULL; /* set if we find an O_LOG */ 1461 ipfw_insn_altq *altqptr = NULL; /* set if we find an O_ALTQ */ 1462 int or_block = 0; /* we are in an or block */ 1463 uint32_t set_disable; 1464 1465 bcopy(&rule->next_rule, &set_disable, sizeof(set_disable)); 1466 1467 if (set_disable & (1 << rule->set)) { /* disabled */ 1468 if (!show_sets) 1469 return; 1470 else 1471 printf("# DISABLED "); 1472 } 1473 printf("%05u ", rule->rulenum); 1474 1475 if (pcwidth>0 || bcwidth>0) 1476 printf("%*llu %*llu ", pcwidth, align_uint64(&rule->pcnt), 1477 bcwidth, align_uint64(&rule->bcnt)); 1478 1479 if (do_time == 2) 1480 printf("%10u ", rule->timestamp); 1481 else if (do_time == 1) { 1482 char timestr[30]; 1483 time_t t = (time_t)0; 1484 1485 if (twidth == 0) { 1486 strcpy(timestr, ctime(&t)); 1487 *strchr(timestr, '\n') = '\0'; 1488 twidth = strlen(timestr); 1489 } 1490 if (rule->timestamp) { 1491 t = _long_to_time(rule->timestamp); 1492 1493 strcpy(timestr, ctime(&t)); 1494 *strchr(timestr, '\n') = '\0'; 1495 printf("%s ", timestr); 1496 } else { 1497 printf("%*s", twidth, " "); 1498 } 1499 } 1500 1501 if (show_sets) 1502 printf("set %d ", rule->set); 1503 1504 /* 1505 * print the optional "match probability" 1506 */ 1507 if (rule->cmd_len > 0) { 1508 cmd = rule->cmd ; 1509 if (cmd->opcode == O_PROB) { 1510 ipfw_insn_u32 *p = (ipfw_insn_u32 *)cmd; 1511 double d = 1.0 * p->d[0]; 1512 1513 d = (d / 0x7fffffff); 1514 printf("prob %f ", d); 1515 } 1516 } 1517 1518 /* 1519 * first print actions 1520 */ 1521 for (l = rule->cmd_len - rule->act_ofs, cmd = ACTION_PTR(rule); 1522 l > 0 ; l -= F_LEN(cmd), cmd += F_LEN(cmd)) { 1523 switch(cmd->opcode) { 1524 case O_CHECK_STATE: 1525 printf("check-state"); 1526 flags = HAVE_IP; /* avoid printing anything else */ 1527 break; 1528 1529 case O_ACCEPT: 1530 printf("allow"); 1531 break; 1532 1533 case O_COUNT: 1534 printf("count"); 1535 break; 1536 1537 case O_DENY: 1538 printf("deny"); 1539 break; 1540 1541 case O_REJECT: 1542 if (cmd->arg1 == ICMP_REJECT_RST) 1543 printf("reset"); 1544 else if (cmd->arg1 == ICMP_UNREACH_HOST) 1545 printf("reject"); 1546 else 1547 print_reject_code(cmd->arg1); 1548 break; 1549 1550 case O_UNREACH6: 1551 if (cmd->arg1 == ICMP6_UNREACH_RST) 1552 printf("reset6"); 1553 else 1554 print_unreach6_code(cmd->arg1); 1555 break; 1556 1557 case O_SKIPTO: 1558 PRINT_UINT_ARG("skipto ", cmd->arg1); 1559 break; 1560 1561 case O_PIPE: 1562 PRINT_UINT_ARG("pipe ", cmd->arg1); 1563 break; 1564 1565 case O_QUEUE: 1566 PRINT_UINT_ARG("queue ", cmd->arg1); 1567 break; 1568 1569 case O_DIVERT: 1570 PRINT_UINT_ARG("divert ", cmd->arg1); 1571 break; 1572 1573 case O_TEE: 1574 PRINT_UINT_ARG("tee ", cmd->arg1); 1575 break; 1576 1577 case O_NETGRAPH: 1578 PRINT_UINT_ARG("netgraph ", cmd->arg1); 1579 break; 1580 1581 case O_NGTEE: 1582 PRINT_UINT_ARG("ngtee ", cmd->arg1); 1583 break; 1584 1585 case O_FORWARD_IP: 1586 { 1587 ipfw_insn_sa *s = (ipfw_insn_sa *)cmd; 1588 1589 if (s->sa.sin_addr.s_addr == INADDR_ANY) { 1590 printf("fwd tablearg"); 1591 } else { 1592 printf("fwd %s", inet_ntoa(s->sa.sin_addr)); 1593 } 1594 if (s->sa.sin_port) 1595 printf(",%d", s->sa.sin_port); 1596 } 1597 break; 1598 1599 case O_LOG: /* O_LOG is printed last */ 1600 logptr = (ipfw_insn_log *)cmd; 1601 break; 1602 1603 case O_ALTQ: /* O_ALTQ is printed after O_LOG */ 1604 altqptr = (ipfw_insn_altq *)cmd; 1605 break; 1606 1607 case O_TAG: 1608 tagptr = cmd; 1609 break; 1610 1611 case O_NAT: 1612 printf("nat %u", cmd->arg1); 1613 break; 1614 1615 default: 1616 printf("** unrecognized action %d len %d ", 1617 cmd->opcode, cmd->len); 1618 } 1619 } 1620 if (logptr) { 1621 if (logptr->max_log > 0) 1622 printf(" log logamount %d", logptr->max_log); 1623 else 1624 printf(" log"); 1625 } 1626 if (altqptr) { 1627 const char *qname; 1628 1629 qname = altq_qid_to_name(altqptr->qid); 1630 if (qname == NULL) 1631 printf(" altq ?<%u>", altqptr->qid); 1632 else 1633 printf(" altq %s", qname); 1634 } 1635 if (tagptr) { 1636 if (tagptr->len & F_NOT) 1637 PRINT_UINT_ARG(" untag ", tagptr->arg1); 1638 else 1639 PRINT_UINT_ARG(" tag ", tagptr->arg1); 1640 } 1641 1642 /* 1643 * then print the body. 1644 */ 1645 for (l = rule->act_ofs, cmd = rule->cmd ; 1646 l > 0 ; l -= F_LEN(cmd) , cmd += F_LEN(cmd)) { 1647 if ((cmd->len & F_OR) || (cmd->len & F_NOT)) 1648 continue; 1649 if (cmd->opcode == O_IP4) { 1650 flags |= HAVE_PROTO4; 1651 break; 1652 } else if (cmd->opcode == O_IP6) { 1653 flags |= HAVE_PROTO6; 1654 break; 1655 } 1656 } 1657 if (rule->_pad & 1) { /* empty rules before options */ 1658 if (!do_compact) { 1659 show_prerequisites(&flags, HAVE_PROTO, 0); 1660 printf(" from any to any"); 1661 } 1662 flags |= HAVE_IP | HAVE_OPTIONS; 1663 } 1664 1665 if (comment_only) 1666 comment = "..."; 1667 1668 for (l = rule->act_ofs, cmd = rule->cmd ; 1669 l > 0 ; l -= F_LEN(cmd) , cmd += F_LEN(cmd)) { 1670 /* useful alias */ 1671 ipfw_insn_u32 *cmd32 = (ipfw_insn_u32 *)cmd; 1672 1673 if (comment_only) { 1674 if (cmd->opcode != O_NOP) 1675 continue; 1676 printf(" // %s\n", (char *)(cmd + 1)); 1677 return; 1678 } 1679 1680 show_prerequisites(&flags, 0, cmd->opcode); 1681 1682 switch(cmd->opcode) { 1683 case O_PROB: 1684 break; /* done already */ 1685 1686 case O_PROBE_STATE: 1687 break; /* no need to print anything here */ 1688 1689 case O_IP_SRC: 1690 case O_IP_SRC_LOOKUP: 1691 case O_IP_SRC_MASK: 1692 case O_IP_SRC_ME: 1693 case O_IP_SRC_SET: 1694 show_prerequisites(&flags, HAVE_PROTO, 0); 1695 if (!(flags & HAVE_SRCIP)) 1696 printf(" from"); 1697 if ((cmd->len & F_OR) && !or_block) 1698 printf(" {"); 1699 print_ip((ipfw_insn_ip *)cmd, 1700 (flags & HAVE_OPTIONS) ? " src-ip" : ""); 1701 flags |= HAVE_SRCIP; 1702 break; 1703 1704 case O_IP_DST: 1705 case O_IP_DST_LOOKUP: 1706 case O_IP_DST_MASK: 1707 case O_IP_DST_ME: 1708 case O_IP_DST_SET: 1709 show_prerequisites(&flags, HAVE_PROTO|HAVE_SRCIP, 0); 1710 if (!(flags & HAVE_DSTIP)) 1711 printf(" to"); 1712 if ((cmd->len & F_OR) && !or_block) 1713 printf(" {"); 1714 print_ip((ipfw_insn_ip *)cmd, 1715 (flags & HAVE_OPTIONS) ? " dst-ip" : ""); 1716 flags |= HAVE_DSTIP; 1717 break; 1718 1719 case O_IP6_SRC: 1720 case O_IP6_SRC_MASK: 1721 case O_IP6_SRC_ME: 1722 show_prerequisites(&flags, HAVE_PROTO, 0); 1723 if (!(flags & HAVE_SRCIP)) 1724 printf(" from"); 1725 if ((cmd->len & F_OR) && !or_block) 1726 printf(" {"); 1727 print_ip6((ipfw_insn_ip6 *)cmd, 1728 (flags & HAVE_OPTIONS) ? " src-ip6" : ""); 1729 flags |= HAVE_SRCIP | HAVE_PROTO; 1730 break; 1731 1732 case O_IP6_DST: 1733 case O_IP6_DST_MASK: 1734 case O_IP6_DST_ME: 1735 show_prerequisites(&flags, HAVE_PROTO|HAVE_SRCIP, 0); 1736 if (!(flags & HAVE_DSTIP)) 1737 printf(" to"); 1738 if ((cmd->len & F_OR) && !or_block) 1739 printf(" {"); 1740 print_ip6((ipfw_insn_ip6 *)cmd, 1741 (flags & HAVE_OPTIONS) ? " dst-ip6" : ""); 1742 flags |= HAVE_DSTIP; 1743 break; 1744 1745 case O_FLOW6ID: 1746 print_flow6id( (ipfw_insn_u32 *) cmd ); 1747 flags |= HAVE_OPTIONS; 1748 break; 1749 1750 case O_IP_DSTPORT: 1751 show_prerequisites(&flags, HAVE_IP, 0); 1752 case O_IP_SRCPORT: 1753 show_prerequisites(&flags, HAVE_PROTO|HAVE_SRCIP, 0); 1754 if ((cmd->len & F_OR) && !or_block) 1755 printf(" {"); 1756 print_newports((ipfw_insn_u16 *)cmd, proto, 1757 (flags & HAVE_OPTIONS) ? cmd->opcode : 0); 1758 break; 1759 1760 case O_PROTO: { 1761 struct protoent *pe = NULL; 1762 1763 if ((cmd->len & F_OR) && !or_block) 1764 printf(" {"); 1765 if (cmd->len & F_NOT) 1766 printf(" not"); 1767 proto = cmd->arg1; 1768 pe = getprotobynumber(cmd->arg1); 1769 if ((flags & (HAVE_PROTO4 | HAVE_PROTO6)) && 1770 !(flags & HAVE_PROTO)) 1771 show_prerequisites(&flags, 1772 HAVE_IP | HAVE_OPTIONS, 0); 1773 if (flags & HAVE_OPTIONS) 1774 printf(" proto"); 1775 if (pe) 1776 printf(" %s", pe->p_name); 1777 else 1778 printf(" %u", cmd->arg1); 1779 } 1780 flags |= HAVE_PROTO; 1781 break; 1782 1783 default: /*options ... */ 1784 if (!(cmd->len & (F_OR|F_NOT))) 1785 if (((cmd->opcode == O_IP6) && 1786 (flags & HAVE_PROTO6)) || 1787 ((cmd->opcode == O_IP4) && 1788 (flags & HAVE_PROTO4))) 1789 break; 1790 show_prerequisites(&flags, HAVE_IP | HAVE_OPTIONS, 0); 1791 if ((cmd->len & F_OR) && !or_block) 1792 printf(" {"); 1793 if (cmd->len & F_NOT && cmd->opcode != O_IN) 1794 printf(" not"); 1795 switch(cmd->opcode) { 1796 case O_MACADDR2: { 1797 ipfw_insn_mac *m = (ipfw_insn_mac *)cmd; 1798 1799 printf(" MAC"); 1800 print_mac(m->addr, m->mask); 1801 print_mac(m->addr + 6, m->mask + 6); 1802 } 1803 break; 1804 1805 case O_MAC_TYPE: 1806 print_newports((ipfw_insn_u16 *)cmd, 1807 IPPROTO_ETHERTYPE, cmd->opcode); 1808 break; 1809 1810 1811 case O_FRAG: 1812 printf(" frag"); 1813 break; 1814 1815 case O_IN: 1816 printf(cmd->len & F_NOT ? " out" : " in"); 1817 break; 1818 1819 case O_DIVERTED: 1820 switch (cmd->arg1) { 1821 case 3: 1822 printf(" diverted"); 1823 break; 1824 case 1: 1825 printf(" diverted-loopback"); 1826 break; 1827 case 2: 1828 printf(" diverted-output"); 1829 break; 1830 default: 1831 printf(" diverted-?<%u>", cmd->arg1); 1832 break; 1833 } 1834 break; 1835 1836 case O_LAYER2: 1837 printf(" layer2"); 1838 break; 1839 case O_XMIT: 1840 case O_RECV: 1841 case O_VIA: 1842 { 1843 char const *s; 1844 ipfw_insn_if *cmdif = (ipfw_insn_if *)cmd; 1845 1846 if (cmd->opcode == O_XMIT) 1847 s = "xmit"; 1848 else if (cmd->opcode == O_RECV) 1849 s = "recv"; 1850 else /* if (cmd->opcode == O_VIA) */ 1851 s = "via"; 1852 if (cmdif->name[0] == '\0') 1853 printf(" %s %s", s, 1854 inet_ntoa(cmdif->p.ip)); 1855 else 1856 printf(" %s %s", s, cmdif->name); 1857 1858 break; 1859 } 1860 case O_IPID: 1861 if (F_LEN(cmd) == 1) 1862 printf(" ipid %u", cmd->arg1 ); 1863 else 1864 print_newports((ipfw_insn_u16 *)cmd, 0, 1865 O_IPID); 1866 break; 1867 1868 case O_IPTTL: 1869 if (F_LEN(cmd) == 1) 1870 printf(" ipttl %u", cmd->arg1 ); 1871 else 1872 print_newports((ipfw_insn_u16 *)cmd, 0, 1873 O_IPTTL); 1874 break; 1875 1876 case O_IPVER: 1877 printf(" ipver %u", cmd->arg1 ); 1878 break; 1879 1880 case O_IPPRECEDENCE: 1881 printf(" ipprecedence %u", (cmd->arg1) >> 5 ); 1882 break; 1883 1884 case O_IPLEN: 1885 if (F_LEN(cmd) == 1) 1886 printf(" iplen %u", cmd->arg1 ); 1887 else 1888 print_newports((ipfw_insn_u16 *)cmd, 0, 1889 O_IPLEN); 1890 break; 1891 1892 case O_IPOPT: 1893 print_flags("ipoptions", cmd, f_ipopts); 1894 break; 1895 1896 case O_IPTOS: 1897 print_flags("iptos", cmd, f_iptos); 1898 break; 1899 1900 case O_ICMPTYPE: 1901 print_icmptypes((ipfw_insn_u32 *)cmd); 1902 break; 1903 1904 case O_ESTAB: 1905 printf(" established"); 1906 break; 1907 1908 case O_TCPDATALEN: 1909 if (F_LEN(cmd) == 1) 1910 printf(" tcpdatalen %u", cmd->arg1 ); 1911 else 1912 print_newports((ipfw_insn_u16 *)cmd, 0, 1913 O_TCPDATALEN); 1914 break; 1915 1916 case O_TCPFLAGS: 1917 print_flags("tcpflags", cmd, f_tcpflags); 1918 break; 1919 1920 case O_TCPOPTS: 1921 print_flags("tcpoptions", cmd, f_tcpopts); 1922 break; 1923 1924 case O_TCPWIN: 1925 printf(" tcpwin %d", ntohs(cmd->arg1)); 1926 break; 1927 1928 case O_TCPACK: 1929 printf(" tcpack %d", ntohl(cmd32->d[0])); 1930 break; 1931 1932 case O_TCPSEQ: 1933 printf(" tcpseq %d", ntohl(cmd32->d[0])); 1934 break; 1935 1936 case O_UID: 1937 { 1938 struct passwd *pwd = getpwuid(cmd32->d[0]); 1939 1940 if (pwd) 1941 printf(" uid %s", pwd->pw_name); 1942 else 1943 printf(" uid %u", cmd32->d[0]); 1944 } 1945 break; 1946 1947 case O_GID: 1948 { 1949 struct group *grp = getgrgid(cmd32->d[0]); 1950 1951 if (grp) 1952 printf(" gid %s", grp->gr_name); 1953 else 1954 printf(" gid %u", cmd32->d[0]); 1955 } 1956 break; 1957 1958 case O_JAIL: 1959 printf(" jail %d", cmd32->d[0]); 1960 break; 1961 1962 case O_VERREVPATH: 1963 printf(" verrevpath"); 1964 break; 1965 1966 case O_VERSRCREACH: 1967 printf(" versrcreach"); 1968 break; 1969 1970 case O_ANTISPOOF: 1971 printf(" antispoof"); 1972 break; 1973 1974 case O_IPSEC: 1975 printf(" ipsec"); 1976 break; 1977 1978 case O_NOP: 1979 comment = (char *)(cmd + 1); 1980 break; 1981 1982 case O_KEEP_STATE: 1983 printf(" keep-state"); 1984 break; 1985 1986 case O_LIMIT: { 1987 struct _s_x *p = limit_masks; 1988 ipfw_insn_limit *c = (ipfw_insn_limit *)cmd; 1989 uint8_t x = c->limit_mask; 1990 char const *comma = " "; 1991 1992 printf(" limit"); 1993 for (; p->x != 0 ; p++) 1994 if ((x & p->x) == p->x) { 1995 x &= ~p->x; 1996 printf("%s%s", comma, p->s); 1997 comma = ","; 1998 } 1999 PRINT_UINT_ARG(" ", c->conn_limit); 2000 break; 2001 } 2002 2003 case O_IP6: 2004 printf(" ip6"); 2005 break; 2006 2007 case O_IP4: 2008 printf(" ip4"); 2009 break; 2010 2011 case O_ICMP6TYPE: 2012 print_icmp6types((ipfw_insn_u32 *)cmd); 2013 break; 2014 2015 case O_EXT_HDR: 2016 print_ext6hdr( (ipfw_insn *) cmd ); 2017 break; 2018 2019 case O_TAGGED: 2020 if (F_LEN(cmd) == 1) 2021 PRINT_UINT_ARG(" tagged ", cmd->arg1); 2022 else 2023 print_newports((ipfw_insn_u16 *)cmd, 0, 2024 O_TAGGED); 2025 break; 2026 2027 default: 2028 printf(" [opcode %d len %d]", 2029 cmd->opcode, cmd->len); 2030 } 2031 } 2032 if (cmd->len & F_OR) { 2033 printf(" or"); 2034 or_block = 1; 2035 } else if (or_block) { 2036 printf(" }"); 2037 or_block = 0; 2038 } 2039 } 2040 show_prerequisites(&flags, HAVE_IP, 0); 2041 if (comment) 2042 printf(" // %s", comment); 2043 printf("\n"); 2044} 2045 2046static void 2047show_dyn_ipfw(ipfw_dyn_rule *d, int pcwidth, int bcwidth) 2048{ 2049 struct protoent *pe; 2050 struct in_addr a; 2051 uint16_t rulenum; 2052 char buf[INET6_ADDRSTRLEN]; 2053 2054 if (!do_expired) { 2055 if (!d->expire && !(d->dyn_type == O_LIMIT_PARENT)) 2056 return; 2057 } 2058 bcopy(&d->rule, &rulenum, sizeof(rulenum)); 2059 printf("%05d", rulenum); 2060 if (pcwidth>0 || bcwidth>0) 2061 printf(" %*llu %*llu (%ds)", pcwidth, 2062 align_uint64(&d->pcnt), bcwidth, 2063 align_uint64(&d->bcnt), d->expire); 2064 switch (d->dyn_type) { 2065 case O_LIMIT_PARENT: 2066 printf(" PARENT %d", d->count); 2067 break; 2068 case O_LIMIT: 2069 printf(" LIMIT"); 2070 break; 2071 case O_KEEP_STATE: /* bidir, no mask */ 2072 printf(" STATE"); 2073 break; 2074 } 2075 2076 if ((pe = getprotobynumber(d->id.proto)) != NULL) 2077 printf(" %s", pe->p_name); 2078 else 2079 printf(" proto %u", d->id.proto); 2080 2081 if (d->id.addr_type == 4) { 2082 a.s_addr = htonl(d->id.src_ip); 2083 printf(" %s %d", inet_ntoa(a), d->id.src_port); 2084 2085 a.s_addr = htonl(d->id.dst_ip); 2086 printf(" <-> %s %d", inet_ntoa(a), d->id.dst_port); 2087 } else if (d->id.addr_type == 6) { 2088 printf(" %s %d", inet_ntop(AF_INET6, &d->id.src_ip6, buf, 2089 sizeof(buf)), d->id.src_port); 2090 printf(" <-> %s %d", inet_ntop(AF_INET6, &d->id.dst_ip6, buf, 2091 sizeof(buf)), d->id.dst_port); 2092 } else 2093 printf(" UNKNOWN <-> UNKNOWN\n"); 2094 2095 printf("\n"); 2096} 2097 2098static int 2099sort_q(const void *pa, const void *pb) 2100{ 2101 int rev = (do_sort < 0); 2102 int field = rev ? -do_sort : do_sort; 2103 long long res = 0; 2104 const struct dn_flow_queue *a = pa; 2105 const struct dn_flow_queue *b = pb; 2106 2107 switch (field) { 2108 case 1: /* pkts */ 2109 res = a->len - b->len; 2110 break; 2111 case 2: /* bytes */ 2112 res = a->len_bytes - b->len_bytes; 2113 break; 2114 2115 case 3: /* tot pkts */ 2116 res = a->tot_pkts - b->tot_pkts; 2117 break; 2118 2119 case 4: /* tot bytes */ 2120 res = a->tot_bytes - b->tot_bytes; 2121 break; 2122 } 2123 if (res < 0) 2124 res = -1; 2125 if (res > 0) 2126 res = 1; 2127 return (int)(rev ? res : -res); 2128} 2129 2130static void 2131list_queues(struct dn_flow_set *fs, struct dn_flow_queue *q) 2132{ 2133 int l; 2134 int index_printed, indexes = 0; 2135 char buff[255]; 2136 struct protoent *pe; 2137 2138 if (fs->rq_elements == 0) 2139 return; 2140 2141 if (do_sort != 0) 2142 heapsort(q, fs->rq_elements, sizeof *q, sort_q); 2143 2144 /* Print IPv4 flows */ 2145 index_printed = 0; 2146 for (l = 0; l < fs->rq_elements; l++) { 2147 struct in_addr ina; 2148 2149 /* XXX: Should check for IPv4 flows */ 2150 if (IS_IP6_FLOW_ID(&(q[l].id))) 2151 continue; 2152 2153 if (!index_printed) { 2154 index_printed = 1; 2155 if (indexes > 0) /* currently a no-op */ 2156 printf("\n"); 2157 indexes++; 2158 printf(" " 2159 "mask: 0x%02x 0x%08x/0x%04x -> 0x%08x/0x%04x\n", 2160 fs->flow_mask.proto, 2161 fs->flow_mask.src_ip, fs->flow_mask.src_port, 2162 fs->flow_mask.dst_ip, fs->flow_mask.dst_port); 2163 2164 printf("BKT Prot ___Source IP/port____ " 2165 "____Dest. IP/port____ " 2166 "Tot_pkt/bytes Pkt/Byte Drp\n"); 2167 } 2168 2169 printf("%3d ", q[l].hash_slot); 2170 pe = getprotobynumber(q[l].id.proto); 2171 if (pe) 2172 printf("%-4s ", pe->p_name); 2173 else 2174 printf("%4u ", q[l].id.proto); 2175 ina.s_addr = htonl(q[l].id.src_ip); 2176 printf("%15s/%-5d ", 2177 inet_ntoa(ina), q[l].id.src_port); 2178 ina.s_addr = htonl(q[l].id.dst_ip); 2179 printf("%15s/%-5d ", 2180 inet_ntoa(ina), q[l].id.dst_port); 2181 printf("%4qu %8qu %2u %4u %3u\n", 2182 q[l].tot_pkts, q[l].tot_bytes, 2183 q[l].len, q[l].len_bytes, q[l].drops); 2184 if (verbose) 2185 printf(" S %20qd F %20qd\n", 2186 q[l].S, q[l].F); 2187 } 2188 2189 /* Print IPv6 flows */ 2190 index_printed = 0; 2191 for (l = 0; l < fs->rq_elements; l++) { 2192 if (!IS_IP6_FLOW_ID(&(q[l].id))) 2193 continue; 2194 2195 if (!index_printed) { 2196 index_printed = 1; 2197 if (indexes > 0) 2198 printf("\n"); 2199 indexes++; 2200 printf("\n mask: proto: 0x%02x, flow_id: 0x%08x, ", 2201 fs->flow_mask.proto, fs->flow_mask.flow_id6); 2202 inet_ntop(AF_INET6, &(fs->flow_mask.src_ip6), 2203 buff, sizeof(buff)); 2204 printf("%s/0x%04x -> ", buff, fs->flow_mask.src_port); 2205 inet_ntop( AF_INET6, &(fs->flow_mask.dst_ip6), 2206 buff, sizeof(buff) ); 2207 printf("%s/0x%04x\n", buff, fs->flow_mask.dst_port); 2208 2209 printf("BKT ___Prot___ _flow-id_ " 2210 "______________Source IPv6/port_______________ " 2211 "_______________Dest. IPv6/port_______________ " 2212 "Tot_pkt/bytes Pkt/Byte Drp\n"); 2213 } 2214 printf("%3d ", q[l].hash_slot); 2215 pe = getprotobynumber(q[l].id.proto); 2216 if (pe != NULL) 2217 printf("%9s ", pe->p_name); 2218 else 2219 printf("%9u ", q[l].id.proto); 2220 printf("%7d %39s/%-5d ", q[l].id.flow_id6, 2221 inet_ntop(AF_INET6, &(q[l].id.src_ip6), buff, sizeof(buff)), 2222 q[l].id.src_port); 2223 printf(" %39s/%-5d ", 2224 inet_ntop(AF_INET6, &(q[l].id.dst_ip6), buff, sizeof(buff)), 2225 q[l].id.dst_port); 2226 printf(" %4qu %8qu %2u %4u %3u\n", 2227 q[l].tot_pkts, q[l].tot_bytes, 2228 q[l].len, q[l].len_bytes, q[l].drops); 2229 if (verbose) 2230 printf(" S %20qd F %20qd\n", q[l].S, q[l].F); 2231 } 2232} 2233 2234static void 2235print_flowset_parms(struct dn_flow_set *fs, char *prefix) 2236{ 2237 int l; 2238 char qs[30]; 2239 char plr[30]; 2240 char red[90]; /* Display RED parameters */ 2241 2242 l = fs->qsize; 2243 if (fs->flags_fs & DN_QSIZE_IS_BYTES) { 2244 if (l >= 8192) 2245 sprintf(qs, "%d KB", l / 1024); 2246 else 2247 sprintf(qs, "%d B", l); 2248 } else 2249 sprintf(qs, "%3d sl.", l); 2250 if (fs->plr) 2251 sprintf(plr, "plr %f", 1.0 * fs->plr / (double)(0x7fffffff)); 2252 else 2253 plr[0] = '\0'; 2254 if (fs->flags_fs & DN_IS_RED) /* RED parameters */ 2255 sprintf(red, 2256 "\n\t %cRED w_q %f min_th %d max_th %d max_p %f", 2257 (fs->flags_fs & DN_IS_GENTLE_RED) ? 'G' : ' ', 2258 1.0 * fs->w_q / (double)(1 << SCALE_RED), 2259 SCALE_VAL(fs->min_th), 2260 SCALE_VAL(fs->max_th), 2261 1.0 * fs->max_p / (double)(1 << SCALE_RED)); 2262 else 2263 sprintf(red, "droptail"); 2264 2265 printf("%s %s%s %d queues (%d buckets) %s\n", 2266 prefix, qs, plr, fs->rq_elements, fs->rq_size, red); 2267} 2268 2269static void 2270list_pipes(void *data, uint nbytes, int ac, char *av[]) 2271{ 2272 int rulenum; 2273 void *next = data; 2274 struct dn_pipe *p = (struct dn_pipe *) data; 2275 struct dn_flow_set *fs; 2276 struct dn_flow_queue *q; 2277 int l; 2278 2279 if (ac > 0) 2280 rulenum = strtoul(*av++, NULL, 10); 2281 else 2282 rulenum = 0; 2283 for (; nbytes >= sizeof *p; p = (struct dn_pipe *)next) { 2284 double b = p->bandwidth; 2285 char buf[30]; 2286 char prefix[80]; 2287 2288 if (SLIST_NEXT(p, next) != (struct dn_pipe *)DN_IS_PIPE) 2289 break; /* done with pipes, now queues */ 2290 2291 /* 2292 * compute length, as pipe have variable size 2293 */ 2294 l = sizeof(*p) + p->fs.rq_elements * sizeof(*q); 2295 next = (char *)p + l; 2296 nbytes -= l; 2297 2298 if ((rulenum != 0 && rulenum != p->pipe_nr) || do_pipe == 2) 2299 continue; 2300 2301 /* 2302 * Print rate (or clocking interface) 2303 */ 2304 if (p->if_name[0] != '\0') 2305 sprintf(buf, "%s", p->if_name); 2306 else if (b == 0) 2307 sprintf(buf, "unlimited"); 2308 else if (b >= 1000000) 2309 sprintf(buf, "%7.3f Mbit/s", b/1000000); 2310 else if (b >= 1000) 2311 sprintf(buf, "%7.3f Kbit/s", b/1000); 2312 else 2313 sprintf(buf, "%7.3f bit/s ", b); 2314 2315 sprintf(prefix, "%05d: %s %4d ms ", 2316 p->pipe_nr, buf, p->delay); 2317 print_flowset_parms(&(p->fs), prefix); 2318 if (verbose) 2319 printf(" V %20qd\n", p->V >> MY_M); 2320 2321 q = (struct dn_flow_queue *)(p+1); 2322 list_queues(&(p->fs), q); 2323 } 2324 for (fs = next; nbytes >= sizeof *fs; fs = next) { 2325 char prefix[80]; 2326 2327 if (SLIST_NEXT(fs, next) != (struct dn_flow_set *)DN_IS_QUEUE) 2328 break; 2329 l = sizeof(*fs) + fs->rq_elements * sizeof(*q); 2330 next = (char *)fs + l; 2331 nbytes -= l; 2332 2333 if (rulenum != 0 && ((rulenum != fs->fs_nr && do_pipe == 2) || 2334 (rulenum != fs->parent_nr && do_pipe == 1))) { 2335 continue; 2336 } 2337 2338 q = (struct dn_flow_queue *)(fs+1); 2339 sprintf(prefix, "q%05d: weight %d pipe %d ", 2340 fs->fs_nr, fs->weight, fs->parent_nr); 2341 print_flowset_parms(fs, prefix); 2342 list_queues(fs, q); 2343 } 2344} 2345 2346/* 2347 * This one handles all set-related commands 2348 * ipfw set { show | enable | disable } 2349 * ipfw set swap X Y 2350 * ipfw set move X to Y 2351 * ipfw set move rule X to Y 2352 */ 2353static void 2354sets_handler(int ac, char *av[]) 2355{ 2356 uint32_t set_disable, masks[2]; 2357 int i, nbytes; 2358 uint16_t rulenum; 2359 uint8_t cmd, new_set; 2360 2361 ac--; 2362 av++; 2363 2364 if (!ac) 2365 errx(EX_USAGE, "set needs command"); 2366 if (_substrcmp(*av, "show") == 0) { 2367 void *data; 2368 char const *msg; 2369 2370 nbytes = sizeof(struct ip_fw); 2371 if ((data = calloc(1, nbytes)) == NULL) 2372 err(EX_OSERR, "calloc"); 2373 if (do_cmd(IP_FW_GET, data, (uintptr_t)&nbytes) < 0) 2374 err(EX_OSERR, "getsockopt(IP_FW_GET)"); 2375 bcopy(&((struct ip_fw *)data)->next_rule, 2376 &set_disable, sizeof(set_disable)); 2377 2378 for (i = 0, msg = "disable" ; i < RESVD_SET; i++) 2379 if ((set_disable & (1<<i))) { 2380 printf("%s %d", msg, i); 2381 msg = ""; 2382 } 2383 msg = (set_disable) ? " enable" : "enable"; 2384 for (i = 0; i < RESVD_SET; i++) 2385 if (!(set_disable & (1<<i))) { 2386 printf("%s %d", msg, i); 2387 msg = ""; 2388 } 2389 printf("\n"); 2390 } else if (_substrcmp(*av, "swap") == 0) { 2391 ac--; av++; 2392 if (ac != 2) 2393 errx(EX_USAGE, "set swap needs 2 set numbers\n"); 2394 rulenum = atoi(av[0]); 2395 new_set = atoi(av[1]); 2396 if (!isdigit(*(av[0])) || rulenum > RESVD_SET) 2397 errx(EX_DATAERR, "invalid set number %s\n", av[0]); 2398 if (!isdigit(*(av[1])) || new_set > RESVD_SET) 2399 errx(EX_DATAERR, "invalid set number %s\n", av[1]); 2400 masks[0] = (4 << 24) | (new_set << 16) | (rulenum); 2401 i = do_cmd(IP_FW_DEL, masks, sizeof(uint32_t)); 2402 } else if (_substrcmp(*av, "move") == 0) { 2403 ac--; av++; 2404 if (ac && _substrcmp(*av, "rule") == 0) { 2405 cmd = 2; 2406 ac--; av++; 2407 } else 2408 cmd = 3; 2409 if (ac != 3 || _substrcmp(av[1], "to") != 0) 2410 errx(EX_USAGE, "syntax: set move [rule] X to Y\n"); 2411 rulenum = atoi(av[0]); 2412 new_set = atoi(av[2]); 2413 if (!isdigit(*(av[0])) || (cmd == 3 && rulenum > RESVD_SET) || 2414 (cmd == 2 && rulenum == 65535) ) 2415 errx(EX_DATAERR, "invalid source number %s\n", av[0]); 2416 if (!isdigit(*(av[2])) || new_set > RESVD_SET) 2417 errx(EX_DATAERR, "invalid dest. set %s\n", av[1]); 2418 masks[0] = (cmd << 24) | (new_set << 16) | (rulenum); 2419 i = do_cmd(IP_FW_DEL, masks, sizeof(uint32_t)); 2420 } else if (_substrcmp(*av, "disable") == 0 || 2421 _substrcmp(*av, "enable") == 0 ) { 2422 int which = _substrcmp(*av, "enable") == 0 ? 1 : 0; 2423 2424 ac--; av++; 2425 masks[0] = masks[1] = 0; 2426 2427 while (ac) { 2428 if (isdigit(**av)) { 2429 i = atoi(*av); 2430 if (i < 0 || i > RESVD_SET) 2431 errx(EX_DATAERR, 2432 "invalid set number %d\n", i); 2433 masks[which] |= (1<<i); 2434 } else if (_substrcmp(*av, "disable") == 0) 2435 which = 0; 2436 else if (_substrcmp(*av, "enable") == 0) 2437 which = 1; 2438 else 2439 errx(EX_DATAERR, 2440 "invalid set command %s\n", *av); 2441 av++; ac--; 2442 } 2443 if ( (masks[0] & masks[1]) != 0 ) 2444 errx(EX_DATAERR, 2445 "cannot enable and disable the same set\n"); 2446 2447 i = do_cmd(IP_FW_DEL, masks, sizeof(masks)); 2448 if (i) 2449 warn("set enable/disable: setsockopt(IP_FW_DEL)"); 2450 } else 2451 errx(EX_USAGE, "invalid set command %s\n", *av); 2452} 2453 2454static void 2455sysctl_handler(int ac, char *av[], int which) 2456{ 2457 ac--; 2458 av++; 2459 2460 if (ac == 0) { 2461 warnx("missing keyword to enable/disable\n"); 2462 } else if (_substrcmp(*av, "firewall") == 0) { 2463 sysctlbyname("net.inet.ip.fw.enable", NULL, 0, 2464 &which, sizeof(which)); 2465 } else if (_substrcmp(*av, "one_pass") == 0) { 2466 sysctlbyname("net.inet.ip.fw.one_pass", NULL, 0, 2467 &which, sizeof(which)); 2468 } else if (_substrcmp(*av, "debug") == 0) { 2469 sysctlbyname("net.inet.ip.fw.debug", NULL, 0, 2470 &which, sizeof(which)); 2471 } else if (_substrcmp(*av, "verbose") == 0) { 2472 sysctlbyname("net.inet.ip.fw.verbose", NULL, 0, 2473 &which, sizeof(which)); 2474 } else if (_substrcmp(*av, "dyn_keepalive") == 0) { 2475 sysctlbyname("net.inet.ip.fw.dyn_keepalive", NULL, 0, 2476 &which, sizeof(which)); 2477 } else if (_substrcmp(*av, "altq") == 0) { 2478 altq_set_enabled(which); 2479 } else { 2480 warnx("unrecognize enable/disable keyword: %s\n", *av); 2481 } 2482} 2483 2484static void 2485list(int ac, char *av[], int show_counters) 2486{ 2487 struct ip_fw *r; 2488 ipfw_dyn_rule *dynrules, *d; 2489 2490#define NEXT(r) ((struct ip_fw *)((char *)r + RULESIZE(r))) 2491 char *lim; 2492 void *data = NULL; 2493 int bcwidth, n, nbytes, nstat, ndyn, pcwidth, width; 2494 int exitval = EX_OK; 2495 int lac; 2496 char **lav; 2497 u_long rnum, last; 2498 char *endptr; 2499 int seen = 0; 2500 2501 const int ocmd = do_pipe ? IP_DUMMYNET_GET : IP_FW_GET; 2502 int nalloc = 1024; /* start somewhere... */ 2503 2504 last = 0; 2505 2506 if (test_only) { 2507 fprintf(stderr, "Testing only, list disabled\n"); 2508 return; 2509 } 2510 2511 ac--; 2512 av++; 2513 2514 /* get rules or pipes from kernel, resizing array as necessary */ 2515 nbytes = nalloc; 2516 2517 while (nbytes >= nalloc) { 2518 nalloc = nalloc * 2 + 200; 2519 nbytes = nalloc; 2520 if ((data = realloc(data, nbytes)) == NULL) 2521 err(EX_OSERR, "realloc"); 2522 if (do_cmd(ocmd, data, (uintptr_t)&nbytes) < 0) 2523 err(EX_OSERR, "getsockopt(IP_%s_GET)", 2524 do_pipe ? "DUMMYNET" : "FW"); 2525 } 2526 2527 if (do_pipe) { 2528 list_pipes(data, nbytes, ac, av); 2529 goto done; 2530 } 2531 2532 /* 2533 * Count static rules. They have variable size so we 2534 * need to scan the list to count them. 2535 */ 2536 for (nstat = 1, r = data, lim = (char *)data + nbytes; 2537 r->rulenum < 65535 && (char *)r < lim; 2538 ++nstat, r = NEXT(r) ) 2539 ; /* nothing */ 2540 2541 /* 2542 * Count dynamic rules. This is easier as they have 2543 * fixed size. 2544 */ 2545 r = NEXT(r); 2546 dynrules = (ipfw_dyn_rule *)r ; 2547 n = (char *)r - (char *)data; 2548 ndyn = (nbytes - n) / sizeof *dynrules; 2549 2550 /* if showing stats, figure out column widths ahead of time */ 2551 bcwidth = pcwidth = 0; 2552 if (show_counters) { 2553 for (n = 0, r = data; n < nstat; n++, r = NEXT(r)) { 2554 /* packet counter */ 2555 width = snprintf(NULL, 0, "%llu", 2556 align_uint64(&r->pcnt)); 2557 if (width > pcwidth) 2558 pcwidth = width; 2559 2560 /* byte counter */ 2561 width = snprintf(NULL, 0, "%llu", 2562 align_uint64(&r->bcnt)); 2563 if (width > bcwidth) 2564 bcwidth = width; 2565 } 2566 } 2567 if (do_dynamic && ndyn) { 2568 for (n = 0, d = dynrules; n < ndyn; n++, d++) { 2569 width = snprintf(NULL, 0, "%llu", 2570 align_uint64(&d->pcnt)); 2571 if (width > pcwidth) 2572 pcwidth = width; 2573 2574 width = snprintf(NULL, 0, "%llu", 2575 align_uint64(&d->bcnt)); 2576 if (width > bcwidth) 2577 bcwidth = width; 2578 } 2579 } 2580 /* if no rule numbers were specified, list all rules */ 2581 if (ac == 0) { 2582 for (n = 0, r = data; n < nstat; n++, r = NEXT(r) ) 2583 show_ipfw(r, pcwidth, bcwidth); 2584 2585 if (do_dynamic && ndyn) { 2586 printf("## Dynamic rules (%d):\n", ndyn); 2587 for (n = 0, d = dynrules; n < ndyn; n++, d++) 2588 show_dyn_ipfw(d, pcwidth, bcwidth); 2589 } 2590 goto done; 2591 } 2592 2593 /* display specific rules requested on command line */ 2594 2595 for (lac = ac, lav = av; lac != 0; lac--) { 2596 /* convert command line rule # */ 2597 last = rnum = strtoul(*lav++, &endptr, 10); 2598 if (*endptr == '-') 2599 last = strtoul(endptr+1, &endptr, 10); 2600 if (*endptr) { 2601 exitval = EX_USAGE; 2602 warnx("invalid rule number: %s", *(lav - 1)); 2603 continue; 2604 } 2605 for (n = seen = 0, r = data; n < nstat; n++, r = NEXT(r) ) { 2606 if (r->rulenum > last) 2607 break; 2608 if (r->rulenum >= rnum && r->rulenum <= last) { 2609 show_ipfw(r, pcwidth, bcwidth); 2610 seen = 1; 2611 } 2612 } 2613 if (!seen) { 2614 /* give precedence to other error(s) */ 2615 if (exitval == EX_OK) 2616 exitval = EX_UNAVAILABLE; 2617 warnx("rule %lu does not exist", rnum); 2618 } 2619 } 2620 2621 if (do_dynamic && ndyn) { 2622 printf("## Dynamic rules:\n"); 2623 for (lac = ac, lav = av; lac != 0; lac--) { 2624 last = rnum = strtoul(*lav++, &endptr, 10); 2625 if (*endptr == '-') 2626 last = strtoul(endptr+1, &endptr, 10); 2627 if (*endptr) 2628 /* already warned */ 2629 continue; 2630 for (n = 0, d = dynrules; n < ndyn; n++, d++) { 2631 uint16_t rulenum; 2632 2633 bcopy(&d->rule, &rulenum, sizeof(rulenum)); 2634 if (rulenum > rnum) 2635 break; 2636 if (r->rulenum >= rnum && r->rulenum <= last) 2637 show_dyn_ipfw(d, pcwidth, bcwidth); 2638 } 2639 } 2640 } 2641 2642 ac = 0; 2643 2644done: 2645 free(data); 2646 2647 if (exitval != EX_OK) 2648 exit(exitval); 2649#undef NEXT 2650} 2651 2652static void 2653show_usage(void) 2654{ 2655 fprintf(stderr, "usage: ipfw [options]\n" 2656"do \"ipfw -h\" or see ipfw manpage for details\n" 2657); 2658 exit(EX_USAGE); 2659} 2660 2661static void 2662help(void) 2663{ 2664 fprintf(stderr, 2665"ipfw syntax summary (but please do read the ipfw(8) manpage):\n" 2666"ipfw [-abcdefhnNqStTv] <command> where <command> is one of:\n" 2667"add [num] [set N] [prob x] RULE-BODY\n" 2668"{pipe|queue} N config PIPE-BODY\n" 2669"[pipe|queue] {zero|delete|show} [N{,N}]\n" 2670"nat N config {ip IPADDR|if IFNAME|log|deny_in|same_ports|unreg_only|reset|\n" 2671" reverse|proxy_only|redirect_addr linkspec|\n" 2672" redirect_port linkspec|redirect_proto linkspec}\n" 2673"set [disable N... enable N...] | move [rule] X to Y | swap X Y | show\n" 2674"table N {add ip[/bits] [value] | delete ip[/bits] | flush | list}\n" 2675"\n" 2676"RULE-BODY: check-state [PARAMS] | ACTION [PARAMS] ADDR [OPTION_LIST]\n" 2677"ACTION: check-state | allow | count | deny | unreach{,6} CODE |\n" 2678" skipto N | {divert|tee} PORT | forward ADDR |\n" 2679" pipe N | queue N | nat N\n" 2680"PARAMS: [log [logamount LOGLIMIT]] [altq QUEUE_NAME]\n" 2681"ADDR: [ MAC dst src ether_type ] \n" 2682" [ ip from IPADDR [ PORT ] to IPADDR [ PORTLIST ] ]\n" 2683" [ ipv6|ip6 from IP6ADDR [ PORT ] to IP6ADDR [ PORTLIST ] ]\n" 2684"IPADDR: [not] { any | me | ip/bits{x,y,z} | table(t[,v]) | IPLIST }\n" 2685"IP6ADDR: [not] { any | me | me6 | ip6/bits | IP6LIST }\n" 2686"IP6LIST: { ip6 | ip6/bits }[,IP6LIST]\n" 2687"IPLIST: { ip | ip/bits | ip:mask }[,IPLIST]\n" 2688"OPTION_LIST: OPTION [OPTION_LIST]\n" 2689"OPTION: bridged | diverted | diverted-loopback | diverted-output |\n" 2690" {dst-ip|src-ip} IPADDR | {dst-ip6|src-ip6|dst-ipv6|src-ipv6} IP6ADDR |\n" 2691" {dst-port|src-port} LIST |\n" 2692" estab | frag | {gid|uid} N | icmptypes LIST | in | out | ipid LIST |\n" 2693" iplen LIST | ipoptions SPEC | ipprecedence | ipsec | iptos SPEC |\n" 2694" ipttl LIST | ipversion VER | keep-state | layer2 | limit ... |\n" 2695" icmp6types LIST | ext6hdr LIST | flow-id N[,N] |\n" 2696" mac ... | mac-type LIST | proto LIST | {recv|xmit|via} {IF|IPADDR} |\n" 2697" setup | {tcpack|tcpseq|tcpwin} NN | tcpflags SPEC | tcpoptions SPEC |\n" 2698" tcpdatalen LIST | verrevpath | versrcreach | antispoof\n" 2699); 2700exit(0); 2701} 2702 2703 2704static int 2705lookup_host (char *host, struct in_addr *ipaddr) 2706{ 2707 struct hostent *he; 2708 2709 if (!inet_aton(host, ipaddr)) { 2710 if ((he = gethostbyname(host)) == NULL) 2711 return(-1); 2712 *ipaddr = *(struct in_addr *)he->h_addr_list[0]; 2713 } 2714 return(0); 2715} 2716 2717/* 2718 * fills the addr and mask fields in the instruction as appropriate from av. 2719 * Update length as appropriate. 2720 * The following formats are allowed: 2721 * me returns O_IP_*_ME 2722 * 1.2.3.4 single IP address 2723 * 1.2.3.4:5.6.7.8 address:mask 2724 * 1.2.3.4/24 address/mask 2725 * 1.2.3.4/26{1,6,5,4,23} set of addresses in a subnet 2726 * We can have multiple comma-separated address/mask entries. 2727 */ 2728static void 2729fill_ip(ipfw_insn_ip *cmd, char *av) 2730{ 2731 int len = 0; 2732 uint32_t *d = ((ipfw_insn_u32 *)cmd)->d; 2733 2734 cmd->o.len &= ~F_LEN_MASK; /* zero len */ 2735 2736 if (_substrcmp(av, "any") == 0) 2737 return; 2738 2739 if (_substrcmp(av, "me") == 0) { 2740 cmd->o.len |= F_INSN_SIZE(ipfw_insn); 2741 return; 2742 } 2743 2744 if (strncmp(av, "table(", 6) == 0) { 2745 char *p = strchr(av + 6, ','); 2746 2747 if (p) 2748 *p++ = '\0'; 2749 cmd->o.opcode = O_IP_DST_LOOKUP; 2750 cmd->o.arg1 = strtoul(av + 6, NULL, 0); 2751 if (p) { 2752 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32); 2753 d[0] = strtoul(p, NULL, 0); 2754 } else 2755 cmd->o.len |= F_INSN_SIZE(ipfw_insn); 2756 return; 2757 } 2758 2759 while (av) { 2760 /* 2761 * After the address we can have '/' or ':' indicating a mask, 2762 * ',' indicating another address follows, '{' indicating a 2763 * set of addresses of unspecified size. 2764 */ 2765 char *t = NULL, *p = strpbrk(av, "/:,{"); 2766 int masklen; 2767 char md, nd; 2768 2769 if (p) { 2770 md = *p; 2771 *p++ = '\0'; 2772 if ((t = strpbrk(p, ",{")) != NULL) { 2773 nd = *t; 2774 *t = '\0'; 2775 } 2776 } else 2777 md = '\0'; 2778 2779 if (lookup_host(av, (struct in_addr *)&d[0]) != 0) 2780 errx(EX_NOHOST, "hostname ``%s'' unknown", av); 2781 switch (md) { 2782 case ':': 2783 if (!inet_aton(p, (struct in_addr *)&d[1])) 2784 errx(EX_DATAERR, "bad netmask ``%s''", p); 2785 break; 2786 case '/': 2787 masklen = atoi(p); 2788 if (masklen == 0) 2789 d[1] = htonl(0); /* mask */ 2790 else if (masklen > 32) 2791 errx(EX_DATAERR, "bad width ``%s''", p); 2792 else 2793 d[1] = htonl(~0 << (32 - masklen)); 2794 break; 2795 case '{': /* no mask, assume /24 and put back the '{' */ 2796 d[1] = htonl(~0 << (32 - 24)); 2797 *(--p) = md; 2798 break; 2799 2800 case ',': /* single address plus continuation */ 2801 *(--p) = md; 2802 /* FALLTHROUGH */ 2803 case 0: /* initialization value */ 2804 default: 2805 d[1] = htonl(~0); /* force /32 */ 2806 break; 2807 } 2808 d[0] &= d[1]; /* mask base address with mask */ 2809 if (t) 2810 *t = nd; 2811 /* find next separator */ 2812 if (p) 2813 p = strpbrk(p, ",{"); 2814 if (p && *p == '{') { 2815 /* 2816 * We have a set of addresses. They are stored as follows: 2817 * arg1 is the set size (powers of 2, 2..256) 2818 * addr is the base address IN HOST FORMAT 2819 * mask.. is an array of arg1 bits (rounded up to 2820 * the next multiple of 32) with bits set 2821 * for each host in the map. 2822 */ 2823 uint32_t *map = (uint32_t *)&cmd->mask; 2824 int low, high; 2825 int i = contigmask((uint8_t *)&(d[1]), 32); 2826 2827 if (len > 0) 2828 errx(EX_DATAERR, "address set cannot be in a list"); 2829 if (i < 24 || i > 31) 2830 errx(EX_DATAERR, "invalid set with mask %d\n", i); 2831 cmd->o.arg1 = 1<<(32-i); /* map length */ 2832 d[0] = ntohl(d[0]); /* base addr in host format */ 2833 cmd->o.opcode = O_IP_DST_SET; /* default */ 2834 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32) + (cmd->o.arg1+31)/32; 2835 for (i = 0; i < (cmd->o.arg1+31)/32 ; i++) 2836 map[i] = 0; /* clear map */ 2837 2838 av = p + 1; 2839 low = d[0] & 0xff; 2840 high = low + cmd->o.arg1 - 1; 2841 /* 2842 * Here, i stores the previous value when we specify a range 2843 * of addresses within a mask, e.g. 45-63. i = -1 means we 2844 * have no previous value. 2845 */ 2846 i = -1; /* previous value in a range */ 2847 while (isdigit(*av)) { 2848 char *s; 2849 int a = strtol(av, &s, 0); 2850 2851 if (s == av) { /* no parameter */ 2852 if (*av != '}') 2853 errx(EX_DATAERR, "set not closed\n"); 2854 if (i != -1) 2855 errx(EX_DATAERR, "incomplete range %d-", i); 2856 break; 2857 } 2858 if (a < low || a > high) 2859 errx(EX_DATAERR, "addr %d out of range [%d-%d]\n", 2860 a, low, high); 2861 a -= low; 2862 if (i == -1) /* no previous in range */ 2863 i = a; 2864 else { /* check that range is valid */ 2865 if (i > a) 2866 errx(EX_DATAERR, "invalid range %d-%d", 2867 i+low, a+low); 2868 if (*s == '-') 2869 errx(EX_DATAERR, "double '-' in range"); 2870 } 2871 for (; i <= a; i++) 2872 map[i/32] |= 1<<(i & 31); 2873 i = -1; 2874 if (*s == '-') 2875 i = a; 2876 else if (*s == '}') 2877 break; 2878 av = s+1; 2879 } 2880 return; 2881 } 2882 av = p; 2883 if (av) /* then *av must be a ',' */ 2884 av++; 2885 2886 /* Check this entry */ 2887 if (d[1] == 0) { /* "any", specified as x.x.x.x/0 */ 2888 /* 2889 * 'any' turns the entire list into a NOP. 2890 * 'not any' never matches, so it is removed from the 2891 * list unless it is the only item, in which case we 2892 * report an error. 2893 */ 2894 if (cmd->o.len & F_NOT) { /* "not any" never matches */ 2895 if (av == NULL && len == 0) /* only this entry */ 2896 errx(EX_DATAERR, "not any never matches"); 2897 } 2898 /* else do nothing and skip this entry */ 2899 return; 2900 } 2901 /* A single IP can be stored in an optimized format */ 2902 if (d[1] == IP_MASK_ALL && av == NULL && len == 0) { 2903 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32); 2904 return; 2905 } 2906 len += 2; /* two words... */ 2907 d += 2; 2908 } /* end while */ 2909 if (len + 1 > F_LEN_MASK) 2910 errx(EX_DATAERR, "address list too long"); 2911 cmd->o.len |= len+1; 2912} 2913 2914 2915/* Try to find ipv6 address by hostname */ 2916static int 2917lookup_host6 (char *host, struct in6_addr *ip6addr) 2918{ 2919 struct hostent *he; 2920 2921 if (!inet_pton(AF_INET6, host, ip6addr)) { 2922 if ((he = gethostbyname2(host, AF_INET6)) == NULL) 2923 return(-1); 2924 memcpy(ip6addr, he->h_addr_list[0], sizeof( struct in6_addr)); 2925 } 2926 return(0); 2927} 2928 2929 2930/* n2mask sets n bits of the mask */ 2931static void 2932n2mask(struct in6_addr *mask, int n) 2933{ 2934 static int minimask[9] = 2935 { 0x00, 0x80, 0xc0, 0xe0, 0xf0, 0xf8, 0xfc, 0xfe, 0xff }; 2936 u_char *p; 2937 2938 memset(mask, 0, sizeof(struct in6_addr)); 2939 p = (u_char *) mask; 2940 for (; n > 0; p++, n -= 8) { 2941 if (n >= 8) 2942 *p = 0xff; 2943 else 2944 *p = minimask[n]; 2945 } 2946 return; 2947} 2948 2949 2950/* 2951 * fill the addr and mask fields in the instruction as appropriate from av. 2952 * Update length as appropriate. 2953 * The following formats are allowed: 2954 * any matches any IP6. Actually returns an empty instruction. 2955 * me returns O_IP6_*_ME 2956 * 2957 * 03f1::234:123:0342 single IP6 addres 2958 * 03f1::234:123:0342/24 address/mask 2959 * 03f1::234:123:0342/24,03f1::234:123:0343/ List of address 2960 * 2961 * Set of address (as in ipv6) not supported because ipv6 address 2962 * are typically random past the initial prefix. 2963 * Return 1 on success, 0 on failure. 2964 */ 2965static int 2966fill_ip6(ipfw_insn_ip6 *cmd, char *av) 2967{ 2968 int len = 0; 2969 struct in6_addr *d = &(cmd->addr6); 2970 /* 2971 * Needed for multiple address. 2972 * Note d[1] points to struct in6_add r mask6 of cmd 2973 */ 2974 2975 cmd->o.len &= ~F_LEN_MASK; /* zero len */ 2976 2977 if (strcmp(av, "any") == 0) 2978 return (1); 2979 2980 2981 if (strcmp(av, "me") == 0) { /* Set the data for "me" opt*/ 2982 cmd->o.len |= F_INSN_SIZE(ipfw_insn); 2983 return (1); 2984 } 2985 2986 if (strcmp(av, "me6") == 0) { /* Set the data for "me" opt*/ 2987 cmd->o.len |= F_INSN_SIZE(ipfw_insn); 2988 return (1); 2989 } 2990 2991 av = strdup(av); 2992 while (av) { 2993 /* 2994 * After the address we can have '/' indicating a mask, 2995 * or ',' indicating another address follows. 2996 */ 2997 2998 char *p; 2999 int masklen; 3000 char md = '\0'; 3001 3002 if ((p = strpbrk(av, "/,")) ) { 3003 md = *p; /* save the separator */ 3004 *p = '\0'; /* terminate address string */ 3005 p++; /* and skip past it */ 3006 } 3007 /* now p points to NULL, mask or next entry */ 3008 3009 /* lookup stores address in *d as a side effect */ 3010 if (lookup_host6(av, d) != 0) { 3011 /* XXX: failed. Free memory and go */ 3012 errx(EX_DATAERR, "bad address \"%s\"", av); 3013 } 3014 /* next, look at the mask, if any */ 3015 masklen = (md == '/') ? atoi(p) : 128; 3016 if (masklen > 128 || masklen < 0) 3017 errx(EX_DATAERR, "bad width \"%s\''", p); 3018 else 3019 n2mask(&d[1], masklen); 3020 3021 APPLY_MASK(d, &d[1]) /* mask base address with mask */ 3022 3023 /* find next separator */ 3024 3025 if (md == '/') { /* find separator past the mask */ 3026 p = strpbrk(p, ","); 3027 if (p != NULL) 3028 p++; 3029 } 3030 av = p; 3031 3032 /* Check this entry */ 3033 if (masklen == 0) { 3034 /* 3035 * 'any' turns the entire list into a NOP. 3036 * 'not any' never matches, so it is removed from the 3037 * list unless it is the only item, in which case we 3038 * report an error. 3039 */ 3040 if (cmd->o.len & F_NOT && av == NULL && len == 0) 3041 errx(EX_DATAERR, "not any never matches"); 3042 continue; 3043 } 3044 3045 /* 3046 * A single IP can be stored alone 3047 */ 3048 if (masklen == 128 && av == NULL && len == 0) { 3049 len = F_INSN_SIZE(struct in6_addr); 3050 break; 3051 } 3052 3053 /* Update length and pointer to arguments */ 3054 len += F_INSN_SIZE(struct in6_addr)*2; 3055 d += 2; 3056 } /* end while */ 3057 3058 /* 3059 * Total length of the command, remember that 1 is the size of 3060 * the base command. 3061 */ 3062 if (len + 1 > F_LEN_MASK) 3063 errx(EX_DATAERR, "address list too long"); 3064 cmd->o.len |= len+1; 3065 free(av); 3066 return (1); 3067} 3068 3069/* 3070 * fills command for ipv6 flow-id filtering 3071 * note that the 20 bit flow number is stored in a array of u_int32_t 3072 * it's supported lists of flow-id, so in the o.arg1 we store how many 3073 * additional flow-id we want to filter, the basic is 1 3074 */ 3075void 3076fill_flow6( ipfw_insn_u32 *cmd, char *av ) 3077{ 3078 u_int32_t type; /* Current flow number */ 3079 u_int16_t nflow = 0; /* Current flow index */ 3080 char *s = av; 3081 cmd->d[0] = 0; /* Initializing the base number*/ 3082 3083 while (s) { 3084 av = strsep( &s, ",") ; 3085 type = strtoul(av, &av, 0); 3086 if (*av != ',' && *av != '\0') 3087 errx(EX_DATAERR, "invalid ipv6 flow number %s", av); 3088 if (type > 0xfffff) 3089 errx(EX_DATAERR, "flow number out of range %s", av); 3090 cmd->d[nflow] |= type; 3091 nflow++; 3092 } 3093 if( nflow > 0 ) { 3094 cmd->o.opcode = O_FLOW6ID; 3095 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32) + nflow; 3096 cmd->o.arg1 = nflow; 3097 } 3098 else { 3099 errx(EX_DATAERR, "invalid ipv6 flow number %s", av); 3100 } 3101} 3102 3103static ipfw_insn * 3104add_srcip6(ipfw_insn *cmd, char *av) 3105{ 3106 3107 fill_ip6((ipfw_insn_ip6 *)cmd, av); 3108 if (F_LEN(cmd) == 0) /* any */ 3109 ; 3110 if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn)) { /* "me" */ 3111 cmd->opcode = O_IP6_SRC_ME; 3112 } else if (F_LEN(cmd) == 3113 (F_INSN_SIZE(struct in6_addr) + F_INSN_SIZE(ipfw_insn))) { 3114 /* single IP, no mask*/ 3115 cmd->opcode = O_IP6_SRC; 3116 } else { /* addr/mask opt */ 3117 cmd->opcode = O_IP6_SRC_MASK; 3118 } 3119 return cmd; 3120} 3121 3122static ipfw_insn * 3123add_dstip6(ipfw_insn *cmd, char *av) 3124{ 3125 3126 fill_ip6((ipfw_insn_ip6 *)cmd, av); 3127 if (F_LEN(cmd) == 0) /* any */ 3128 ; 3129 if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn)) { /* "me" */ 3130 cmd->opcode = O_IP6_DST_ME; 3131 } else if (F_LEN(cmd) == 3132 (F_INSN_SIZE(struct in6_addr) + F_INSN_SIZE(ipfw_insn))) { 3133 /* single IP, no mask*/ 3134 cmd->opcode = O_IP6_DST; 3135 } else { /* addr/mask opt */ 3136 cmd->opcode = O_IP6_DST_MASK; 3137 } 3138 return cmd; 3139} 3140 3141 3142/* 3143 * helper function to process a set of flags and set bits in the 3144 * appropriate masks. 3145 */ 3146static void 3147fill_flags(ipfw_insn *cmd, enum ipfw_opcodes opcode, 3148 struct _s_x *flags, char *p) 3149{ 3150 uint8_t set=0, clear=0; 3151 3152 while (p && *p) { 3153 char *q; /* points to the separator */ 3154 int val; 3155 uint8_t *which; /* mask we are working on */ 3156 3157 if (*p == '!') { 3158 p++; 3159 which = &clear; 3160 } else 3161 which = &set; 3162 q = strchr(p, ','); 3163 if (q) 3164 *q++ = '\0'; 3165 val = match_token(flags, p); 3166 if (val <= 0) 3167 errx(EX_DATAERR, "invalid flag %s", p); 3168 *which |= (uint8_t)val; 3169 p = q; 3170 } 3171 cmd->opcode = opcode; 3172 cmd->len = (cmd->len & (F_NOT | F_OR)) | 1; 3173 cmd->arg1 = (set & 0xff) | ( (clear & 0xff) << 8); 3174} 3175 3176 3177static void 3178delete(int ac, char *av[]) 3179{ 3180 uint32_t rulenum; 3181 struct dn_pipe p; 3182 int i; 3183 int exitval = EX_OK; 3184 int do_set = 0; 3185 3186 memset(&p, 0, sizeof p); 3187 3188 av++; ac--; 3189 NEED1("missing rule specification"); 3190 if (ac > 0 && _substrcmp(*av, "set") == 0) { 3191 do_set = 1; /* delete set */ 3192 ac--; av++; 3193 } 3194 3195 /* Rule number */ 3196 while (ac && isdigit(**av)) { 3197 i = atoi(*av); av++; ac--; 3198 if (do_nat) { 3199 exitval = do_cmd(IP_FW_NAT_DEL, &i, sizeof i); 3200 if (exitval) { 3201 exitval = EX_UNAVAILABLE; 3202 warn("rule %u not available", i); 3203 } 3204 } else if (do_pipe) { 3205 if (do_pipe == 1) 3206 p.pipe_nr = i; 3207 else 3208 p.fs.fs_nr = i; 3209 i = do_cmd(IP_DUMMYNET_DEL, &p, sizeof p); 3210 if (i) { 3211 exitval = 1; 3212 warn("rule %u: setsockopt(IP_DUMMYNET_DEL)", 3213 do_pipe == 1 ? p.pipe_nr : p.fs.fs_nr); 3214 } 3215 } else { 3216 rulenum = (i & 0xffff) | (do_set << 24); 3217 i = do_cmd(IP_FW_DEL, &rulenum, sizeof rulenum); 3218 if (i) { 3219 exitval = EX_UNAVAILABLE; 3220 warn("rule %u: setsockopt(IP_FW_DEL)", 3221 rulenum); 3222 } 3223 } 3224 } 3225 if (exitval != EX_OK) 3226 exit(exitval); 3227} 3228 3229 3230/* 3231 * fill the interface structure. We do not check the name as we can 3232 * create interfaces dynamically, so checking them at insert time 3233 * makes relatively little sense. 3234 * Interface names containing '*', '?', or '[' are assumed to be shell 3235 * patterns which match interfaces. 3236 */ 3237static void 3238fill_iface(ipfw_insn_if *cmd, char *arg) 3239{ 3240 cmd->name[0] = '\0'; 3241 cmd->o.len |= F_INSN_SIZE(ipfw_insn_if); 3242 3243 /* Parse the interface or address */ 3244 if (strcmp(arg, "any") == 0) 3245 cmd->o.len = 0; /* effectively ignore this command */ 3246 else if (!isdigit(*arg)) { 3247 strlcpy(cmd->name, arg, sizeof(cmd->name)); 3248 cmd->p.glob = strpbrk(arg, "*?[") != NULL ? 1 : 0; 3249 } else if (!inet_aton(arg, &cmd->p.ip)) 3250 errx(EX_DATAERR, "bad ip address ``%s''", arg); 3251} 3252 3253/* 3254 * Search for interface with name "ifn", and fill n accordingly: 3255 * 3256 * n->ip ip address of interface "ifn" 3257 * n->if_name copy of interface name "ifn" 3258 */ 3259static void 3260set_addr_dynamic(const char *ifn, struct cfg_nat *n) 3261{ 3262 size_t needed; 3263 int mib[6]; 3264 char *buf, *lim, *next; 3265 struct if_msghdr *ifm; 3266 struct ifa_msghdr *ifam; 3267 struct sockaddr_dl *sdl; 3268 struct sockaddr_in *sin; 3269 int ifIndex, ifMTU; 3270 3271 mib[0] = CTL_NET; 3272 mib[1] = PF_ROUTE; 3273 mib[2] = 0; 3274 mib[3] = AF_INET; 3275 mib[4] = NET_RT_IFLIST; 3276 mib[5] = 0; 3277/* 3278 * Get interface data. 3279 */ 3280 if (sysctl(mib, 6, NULL, &needed, NULL, 0) == -1) 3281 err(1, "iflist-sysctl-estimate"); 3282 if ((buf = malloc(needed)) == NULL) 3283 errx(1, "malloc failed"); 3284 if (sysctl(mib, 6, buf, &needed, NULL, 0) == -1) 3285 err(1, "iflist-sysctl-get"); 3286 lim = buf + needed; 3287/* 3288 * Loop through interfaces until one with 3289 * given name is found. This is done to 3290 * find correct interface index for routing 3291 * message processing. 3292 */ 3293 ifIndex = 0; 3294 next = buf; 3295 while (next < lim) { 3296 ifm = (struct if_msghdr *)next; 3297 next += ifm->ifm_msglen; 3298 if (ifm->ifm_version != RTM_VERSION) { 3299 if (verbose) 3300 warnx("routing message version %d " 3301 "not understood", ifm->ifm_version); 3302 continue; 3303 } 3304 if (ifm->ifm_type == RTM_IFINFO) { 3305 sdl = (struct sockaddr_dl *)(ifm + 1); 3306 if (strlen(ifn) == sdl->sdl_nlen && 3307 strncmp(ifn, sdl->sdl_data, sdl->sdl_nlen) == 0) { 3308 ifIndex = ifm->ifm_index; 3309 ifMTU = ifm->ifm_data.ifi_mtu; 3310 break; 3311 } 3312 } 3313 } 3314 if (!ifIndex) 3315 errx(1, "unknown interface name %s", ifn); 3316/* 3317 * Get interface address. 3318 */ 3319 sin = NULL; 3320 while (next < lim) { 3321 ifam = (struct ifa_msghdr *)next; 3322 next += ifam->ifam_msglen; 3323 if (ifam->ifam_version != RTM_VERSION) { 3324 if (verbose) 3325 warnx("routing message version %d " 3326 "not understood", ifam->ifam_version); 3327 continue; 3328 } 3329 if (ifam->ifam_type != RTM_NEWADDR) 3330 break; 3331 if (ifam->ifam_addrs & RTA_IFA) { 3332 int i; 3333 char *cp = (char *)(ifam + 1); 3334 3335 for (i = 1; i < RTA_IFA; i <<= 1) { 3336 if (ifam->ifam_addrs & i) 3337 cp += SA_SIZE((struct sockaddr *)cp); 3338 } 3339 if (((struct sockaddr *)cp)->sa_family == AF_INET) { 3340 sin = (struct sockaddr_in *)cp; 3341 break; 3342 } 3343 } 3344 } 3345 if (sin == NULL) 3346 errx(1, "%s: cannot get interface address", ifn); 3347 3348 n->ip = sin->sin_addr; 3349 strncpy(n->if_name, ifn, IF_NAMESIZE); 3350 3351 free(buf); 3352} 3353 3354/* 3355 * XXX - The following functions, macros and definitions come from natd.c: 3356 * it would be better to move them outside natd.c, in a file 3357 * (redirect_support.[ch]?) shared by ipfw and natd, but for now i can live 3358 * with it. 3359 */ 3360 3361/* 3362 * Definition of a port range, and macros to deal with values. 3363 * FORMAT: HI 16-bits == first port in range, 0 == all ports. 3364 * LO 16-bits == number of ports in range 3365 * NOTES: - Port values are not stored in network byte order. 3366 */ 3367 3368#define port_range u_long 3369 3370#define GETLOPORT(x) ((x) >> 0x10) 3371#define GETNUMPORTS(x) ((x) & 0x0000ffff) 3372#define GETHIPORT(x) (GETLOPORT((x)) + GETNUMPORTS((x))) 3373 3374/* Set y to be the low-port value in port_range variable x. */ 3375#define SETLOPORT(x,y) ((x) = ((x) & 0x0000ffff) | ((y) << 0x10)) 3376 3377/* Set y to be the number of ports in port_range variable x. */ 3378#define SETNUMPORTS(x,y) ((x) = ((x) & 0xffff0000) | (y)) 3379 3380static void 3381StrToAddr (const char* str, struct in_addr* addr) 3382{ 3383 struct hostent* hp; 3384 3385 if (inet_aton (str, addr)) 3386 return; 3387 3388 hp = gethostbyname (str); 3389 if (!hp) 3390 errx (1, "unknown host %s", str); 3391 3392 memcpy (addr, hp->h_addr, sizeof (struct in_addr)); 3393} 3394 3395static int 3396StrToPortRange (const char* str, const char* proto, port_range *portRange) 3397{ 3398 char* sep; 3399 struct servent* sp; 3400 char* end; 3401 u_short loPort; 3402 u_short hiPort; 3403 3404 /* First see if this is a service, return corresponding port if so. */ 3405 sp = getservbyname (str,proto); 3406 if (sp) { 3407 SETLOPORT(*portRange, ntohs(sp->s_port)); 3408 SETNUMPORTS(*portRange, 1); 3409 return 0; 3410 } 3411 3412 /* Not a service, see if it's a single port or port range. */ 3413 sep = strchr (str, '-'); 3414 if (sep == NULL) { 3415 SETLOPORT(*portRange, strtol(str, &end, 10)); 3416 if (end != str) { 3417 /* Single port. */ 3418 SETNUMPORTS(*portRange, 1); 3419 return 0; 3420 } 3421 3422 /* Error in port range field. */ 3423 errx (EX_DATAERR, "%s/%s: unknown service", str, proto); 3424 } 3425 3426 /* Port range, get the values and sanity check. */ 3427 sscanf (str, "%hu-%hu", &loPort, &hiPort); 3428 SETLOPORT(*portRange, loPort); 3429 SETNUMPORTS(*portRange, 0); /* Error by default */ 3430 if (loPort <= hiPort) 3431 SETNUMPORTS(*portRange, hiPort - loPort + 1); 3432 3433 if (GETNUMPORTS(*portRange) == 0) 3434 errx (EX_DATAERR, "invalid port range %s", str); 3435 3436 return 0; 3437} 3438 3439static int 3440StrToProto (const char* str) 3441{ 3442 if (!strcmp (str, "tcp")) 3443 return IPPROTO_TCP; 3444 3445 if (!strcmp (str, "udp")) 3446 return IPPROTO_UDP; 3447 3448 errx (EX_DATAERR, "unknown protocol %s. Expected tcp or udp", str); 3449} 3450 3451static int 3452StrToAddrAndPortRange (const char* str, struct in_addr* addr, char* proto, 3453 port_range *portRange) 3454{ 3455 char* ptr; 3456 3457 ptr = strchr (str, ':'); 3458 if (!ptr) 3459 errx (EX_DATAERR, "%s is missing port number", str); 3460 3461 *ptr = '\0'; 3462 ++ptr; 3463 3464 StrToAddr (str, addr); 3465 return StrToPortRange (ptr, proto, portRange); 3466} 3467 3468/* End of stuff taken from natd.c. */ 3469 3470#define INC_ARGCV() do { \ 3471 (*_av)++; \ 3472 (*_ac)--; \ 3473 av = *_av; \ 3474 ac = *_ac; \ 3475} while(0) 3476 3477/* 3478 * The next 3 functions add support for the addr, port and proto redirect and 3479 * their logic is loosely based on SetupAddressRedirect(), SetupPortRedirect() 3480 * and SetupProtoRedirect() from natd.c. 3481 * 3482 * Every setup_* function fills at least one redirect entry 3483 * (struct cfg_redir) and zero or more server pool entry (struct cfg_spool) 3484 * in buf. 3485 * 3486 * The format of data in buf is: 3487 * 3488 * 3489 * cfg_nat cfg_redir cfg_spool ...... cfg_spool 3490 * 3491 * ------------------------------------- ------------ 3492 * | | .....X ... | | | | ..... 3493 * ------------------------------------- ...... ------------ 3494 * ^ 3495 * spool_cnt n=0 ...... n=(X-1) 3496 * 3497 * len points to the amount of available space in buf 3498 * space counts the memory consumed by every function 3499 * 3500 * XXX - Every function get all the argv params so it 3501 * has to check, in optional parameters, that the next 3502 * args is a valid option for the redir entry and not 3503 * another token. Only redir_port and redir_proto are 3504 * affected by this. 3505 */ 3506 3507static int 3508setup_redir_addr(char *spool_buf, int len, 3509 int *_ac, char ***_av) 3510{ 3511 char **av, *sep; /* Token separator. */ 3512 /* Temporary buffer used to hold server pool ip's. */ 3513 char tmp_spool_buf[NAT_BUF_LEN]; 3514 int ac, i, space, lsnat; 3515 struct cfg_redir *r; 3516 struct cfg_spool *tmp; 3517 3518 av = *_av; 3519 ac = *_ac; 3520 space = 0; 3521 lsnat = 0; 3522 if (len >= SOF_REDIR) { 3523 r = (struct cfg_redir *)spool_buf; 3524 /* Skip cfg_redir at beginning of buf. */ 3525 spool_buf = &spool_buf[SOF_REDIR]; 3526 space = SOF_REDIR; 3527 len -= SOF_REDIR; 3528 } else 3529 goto nospace; 3530 r->mode = REDIR_ADDR; 3531 /* Extract local address. */ 3532 if (ac == 0) 3533 errx(EX_DATAERR, "redirect_addr: missing local address"); 3534 sep = strchr(*av, ','); 3535 if (sep) { /* LSNAT redirection syntax. */ 3536 r->laddr.s_addr = INADDR_NONE; 3537 /* Preserve av, copy spool servers to tmp_spool_buf. */ 3538 strncpy(tmp_spool_buf, *av, strlen(*av)+1); 3539 lsnat = 1; 3540 } else 3541 StrToAddr(*av, &r->laddr); 3542 INC_ARGCV(); 3543 3544 /* Extract public address. */ 3545 if (ac == 0) 3546 errx(EX_DATAERR, "redirect_addr: missing public address"); 3547 StrToAddr(*av, &r->paddr); 3548 INC_ARGCV(); 3549 3550 /* Setup LSNAT server pool. */ 3551 if (sep) { 3552 sep = strtok(tmp_spool_buf, ","); 3553 while (sep != NULL) { 3554 tmp = (struct cfg_spool *)spool_buf; 3555 if (len < SOF_SPOOL) 3556 goto nospace; 3557 len -= SOF_SPOOL; 3558 space += SOF_SPOOL; 3559 StrToAddr(sep, &tmp->addr); 3560 tmp->port = ~0; 3561 r->spool_cnt++; 3562 /* Point to the next possible cfg_spool. */ 3563 spool_buf = &spool_buf[SOF_SPOOL]; 3564 sep = strtok(NULL, ","); 3565 } 3566 } 3567 return(space); 3568nospace: 3569 errx(EX_DATAERR, "redirect_addr: buf is too small\n"); 3570} 3571 3572static int 3573setup_redir_port(char *spool_buf, int len, 3574 int *_ac, char ***_av) 3575{ 3576 char **av, *sep, *protoName; 3577 char tmp_spool_buf[NAT_BUF_LEN]; 3578 int ac, space, lsnat; 3579 struct cfg_redir *r; 3580 struct cfg_spool *tmp; 3581 u_short numLocalPorts; 3582 port_range portRange; 3583 3584 av = *_av; 3585 ac = *_ac; 3586 space = 0; 3587 lsnat = 0; 3588 numLocalPorts = 0; 3589 3590 if (len >= SOF_REDIR) { 3591 r = (struct cfg_redir *)spool_buf; 3592 /* Skip cfg_redir at beginning of buf. */ 3593 spool_buf = &spool_buf[SOF_REDIR]; 3594 space = SOF_REDIR; 3595 len -= SOF_REDIR; 3596 } else 3597 goto nospace; 3598 r->mode = REDIR_PORT; 3599 /* 3600 * Extract protocol. 3601 */ 3602 if (ac == 0) 3603 errx (EX_DATAERR, "redirect_port: missing protocol"); 3604 r->proto = StrToProto(*av); 3605 protoName = *av; 3606 INC_ARGCV(); 3607 3608 /* 3609 * Extract local address. 3610 */ 3611 if (ac == 0) 3612 errx (EX_DATAERR, "redirect_port: missing local address"); 3613 3614 sep = strchr(*av, ','); 3615 /* LSNAT redirection syntax. */ 3616 if (sep) { 3617 r->laddr.s_addr = INADDR_NONE; 3618 r->lport = ~0; 3619 numLocalPorts = 1; 3620 /* Preserve av, copy spool servers to tmp_spool_buf. */ 3621 strncpy(tmp_spool_buf, *av, strlen(*av)+1); 3622 lsnat = 1; 3623 } else { 3624 if (StrToAddrAndPortRange (*av, &r->laddr, protoName, 3625 &portRange) != 0) 3626 errx(EX_DATAERR, "redirect_port:" 3627 "invalid local port range"); 3628 3629 r->lport = GETLOPORT(portRange); 3630 numLocalPorts = GETNUMPORTS(portRange); 3631 } 3632 INC_ARGCV(); 3633 3634 /* 3635 * Extract public port and optionally address. 3636 */ 3637 if (ac == 0) 3638 errx (EX_DATAERR, "redirect_port: missing public port"); 3639 3640 sep = strchr (*av, ':'); 3641 if (sep) { 3642 if (StrToAddrAndPortRange (*av, &r->paddr, protoName, 3643 &portRange) != 0) 3644 errx(EX_DATAERR, "redirect_port:" 3645 "invalid public port range"); 3646 } else { 3647 r->paddr.s_addr = INADDR_ANY; 3648 if (StrToPortRange (*av, protoName, &portRange) != 0) 3649 errx(EX_DATAERR, "redirect_port:" 3650 "invalid public port range"); 3651 } 3652 3653 r->pport = GETLOPORT(portRange); 3654 r->pport_cnt = GETNUMPORTS(portRange); 3655 INC_ARGCV(); 3656 3657 /* 3658 * Extract remote address and optionally port. 3659 */ 3660 /* 3661 * NB: isalpha(**av) => we've to check that next parameter is really an 3662 * option for this redirect entry, else stop here processing arg[cv]. 3663 */ 3664 if (ac != 0 && !isalpha(**av)) { 3665 sep = strchr (*av, ':'); 3666 if (sep) { 3667 if (StrToAddrAndPortRange (*av, &r->raddr, protoName, 3668 &portRange) != 0) 3669 errx(EX_DATAERR, "redirect_port:" 3670 "invalid remote port range"); 3671 } else { 3672 SETLOPORT(portRange, 0); 3673 SETNUMPORTS(portRange, 1); 3674 StrToAddr (*av, &r->raddr); 3675 } 3676 INC_ARGCV(); 3677 } else { 3678 SETLOPORT(portRange, 0); 3679 SETNUMPORTS(portRange, 1); 3680 r->raddr.s_addr = INADDR_ANY; 3681 } 3682 r->rport = GETLOPORT(portRange); 3683 r->rport_cnt = GETNUMPORTS(portRange); 3684 3685 /* 3686 * Make sure port ranges match up, then add the redirect ports. 3687 */ 3688 if (numLocalPorts != r->pport_cnt) 3689 errx(EX_DATAERR, "redirect_port:" 3690 "port ranges must be equal in size"); 3691 3692 /* Remote port range is allowed to be '0' which means all ports. */ 3693 if (r->rport_cnt != numLocalPorts && 3694 (r->rport_cnt != 1 || r->rport != 0)) 3695 errx(EX_DATAERR, "redirect_port: remote port must" 3696 "be 0 or equal to local port range in size"); 3697 3698 /* 3699 * Setup LSNAT server pool. 3700 */ 3701 if (lsnat) { 3702 sep = strtok(tmp_spool_buf, ","); 3703 while (sep != NULL) { 3704 tmp = (struct cfg_spool *)spool_buf; 3705 if (len < SOF_SPOOL) 3706 goto nospace; 3707 len -= SOF_SPOOL; 3708 space += SOF_SPOOL; 3709 if (StrToAddrAndPortRange(sep, &tmp->addr, protoName, 3710 &portRange) != 0) 3711 errx(EX_DATAERR, "redirect_port:" 3712 "invalid local port range"); 3713 if (GETNUMPORTS(portRange) != 1) 3714 errx(EX_DATAERR, "redirect_port: local port" 3715 "must be single in this context"); 3716 tmp->port = GETLOPORT(portRange); 3717 r->spool_cnt++; 3718 /* Point to the next possible cfg_spool. */ 3719 spool_buf = &spool_buf[SOF_SPOOL]; 3720 sep = strtok(NULL, ","); 3721 } 3722 } 3723 return (space); 3724nospace: 3725 errx(EX_DATAERR, "redirect_port: buf is too small\n"); 3726} 3727 3728static int 3729setup_redir_proto(char *spool_buf, int len, 3730 int *_ac, char ***_av) 3731{ 3732 char **av; 3733 int ac, i, space; 3734 struct protoent *protoent; 3735 struct cfg_redir *r; 3736 3737 av = *_av; 3738 ac = *_ac; 3739 if (len >= SOF_REDIR) { 3740 r = (struct cfg_redir *)spool_buf; 3741 /* Skip cfg_redir at beginning of buf. */ 3742 spool_buf = &spool_buf[SOF_REDIR]; 3743 space = SOF_REDIR; 3744 len -= SOF_REDIR; 3745 } else 3746 goto nospace; 3747 r->mode = REDIR_PROTO; 3748 /* 3749 * Extract protocol. 3750 */ 3751 if (ac == 0) 3752 errx(EX_DATAERR, "redirect_proto: missing protocol"); 3753 3754 protoent = getprotobyname(*av); 3755 if (protoent == NULL) 3756 errx(EX_DATAERR, "redirect_proto: unknown protocol %s", *av); 3757 else 3758 r->proto = protoent->p_proto; 3759 3760 INC_ARGCV(); 3761 3762 /* 3763 * Extract local address. 3764 */ 3765 if (ac == 0) 3766 errx(EX_DATAERR, "redirect_proto: missing local address"); 3767 else 3768 StrToAddr(*av, &r->laddr); 3769 3770 INC_ARGCV(); 3771 3772 /* 3773 * Extract optional public address. 3774 */ 3775 if (ac == 0) { 3776 r->paddr.s_addr = INADDR_ANY; 3777 r->raddr.s_addr = INADDR_ANY; 3778 } else { 3779 /* see above in setup_redir_port() */ 3780 if (!isalpha(**av)) { 3781 StrToAddr(*av, &r->paddr); 3782 INC_ARGCV(); 3783 3784 /* 3785 * Extract optional remote address. 3786 */ 3787 /* see above in setup_redir_port() */ 3788 if (ac!=0 && !isalpha(**av)) { 3789 StrToAddr(*av, &r->raddr); 3790 INC_ARGCV(); 3791 } 3792 } 3793 } 3794 return (space); 3795nospace: 3796 errx(EX_DATAERR, "redirect_proto: buf is too small\n"); 3797} 3798 3799static void 3800show_nat(int ac, char **av); 3801 3802static void 3803print_nat_config(char *buf) { 3804 struct cfg_nat *n; 3805 int i, cnt, flag, off; 3806 struct cfg_redir *t; 3807 struct cfg_spool *s; 3808 struct protoent *p; 3809 3810 n = (struct cfg_nat *)buf; 3811 flag = 1; 3812 off = sizeof(*n); 3813 printf("ipfw nat %u config", n->id); 3814 if (strlen(n->if_name) != 0) 3815 printf(" if %s", n->if_name); 3816 else if (n->ip.s_addr != 0) 3817 printf(" ip %s", inet_ntoa(n->ip)); 3818 while (n->mode != 0) { 3819 if (n->mode & PKT_ALIAS_LOG) { 3820 printf(" log"); 3821 n->mode &= ~PKT_ALIAS_LOG; 3822 } else if (n->mode & PKT_ALIAS_DENY_INCOMING) { 3823 printf(" deny_in"); 3824 n->mode &= ~PKT_ALIAS_DENY_INCOMING; 3825 } else if (n->mode & PKT_ALIAS_SAME_PORTS) { 3826 printf(" same_ports"); 3827 n->mode &= ~PKT_ALIAS_SAME_PORTS; 3828 } else if (n->mode & PKT_ALIAS_UNREGISTERED_ONLY) { 3829 printf(" unreg_only"); 3830 n->mode &= ~PKT_ALIAS_UNREGISTERED_ONLY; 3831 } else if (n->mode & PKT_ALIAS_RESET_ON_ADDR_CHANGE) { 3832 printf(" reset"); 3833 n->mode &= ~PKT_ALIAS_RESET_ON_ADDR_CHANGE; 3834 } else if (n->mode & PKT_ALIAS_REVERSE) { 3835 printf(" reverse"); 3836 n->mode &= ~PKT_ALIAS_REVERSE; 3837 } else if (n->mode & PKT_ALIAS_PROXY_ONLY) { 3838 printf(" proxy_only"); 3839 n->mode &= ~PKT_ALIAS_PROXY_ONLY; 3840 } 3841 } 3842 /* Print all the redirect's data configuration. */ 3843 for (cnt = 0; cnt < n->redir_cnt; cnt++) { 3844 t = (struct cfg_redir *)&buf[off]; 3845 off += SOF_REDIR; 3846 switch (t->mode) { 3847 case REDIR_ADDR: 3848 printf(" redirect_addr"); 3849 if (t->spool_cnt == 0) 3850 printf(" %s", inet_ntoa(t->laddr)); 3851 else 3852 for (i = 0; i < t->spool_cnt; i++) { 3853 s = (struct cfg_spool *)&buf[off]; 3854 if (i) 3855 printf(","); 3856 else 3857 printf(" "); 3858 printf("%s", inet_ntoa(s->addr)); 3859 off += SOF_SPOOL; 3860 } 3861 printf(" %s", inet_ntoa(t->paddr)); 3862 break; 3863 case REDIR_PORT: 3864 p = getprotobynumber(t->proto); 3865 printf(" redirect_port %s ", p->p_name); 3866 if (!t->spool_cnt) { 3867 printf("%s:%u", inet_ntoa(t->laddr), t->lport); 3868 if (t->pport_cnt > 1) 3869 printf("-%u", t->lport + 3870 t->pport_cnt - 1); 3871 } else 3872 for (i=0; i < t->spool_cnt; i++) { 3873 s = (struct cfg_spool *)&buf[off]; 3874 if (i) 3875 printf(","); 3876 printf("%s:%u", inet_ntoa(s->addr), 3877 s->port); 3878 off += SOF_SPOOL; 3879 } 3880 3881 printf(" "); 3882 if (t->paddr.s_addr) 3883 printf("%s:", inet_ntoa(t->paddr)); 3884 printf("%u", t->pport); 3885 if (!t->spool_cnt && t->pport_cnt > 1) 3886 printf("-%u", t->pport + t->pport_cnt - 1); 3887 3888 if (t->raddr.s_addr) { 3889 printf(" %s", inet_ntoa(t->raddr)); 3890 if (t->rport) { 3891 printf(":%u", t->rport); 3892 if (!t->spool_cnt && t->rport_cnt > 1) 3893 printf("-%u", t->rport + 3894 t->rport_cnt - 1); 3895 } 3896 } 3897 break; 3898 case REDIR_PROTO: 3899 p = getprotobynumber(t->proto); 3900 printf(" redirect_proto %s %s", p->p_name, 3901 inet_ntoa(t->laddr)); 3902 if (t->paddr.s_addr != 0) { 3903 printf(" %s", inet_ntoa(t->paddr)); 3904 if (t->raddr.s_addr) 3905 printf(" %s", inet_ntoa(t->raddr)); 3906 } 3907 break; 3908 default: 3909 errx(EX_DATAERR, "unknown redir mode"); 3910 break; 3911 } 3912 } 3913 printf("\n"); 3914} 3915 3916static void 3917config_nat(int ac, char **av) 3918{ 3919 struct cfg_nat *n; /* Nat instance configuration. */ 3920 struct in_addr ip; 3921 int i, len, off, tok; 3922 char *id, buf[NAT_BUF_LEN]; /* Buffer for serialized data. */ 3923 3924 len = NAT_BUF_LEN; 3925 /* Offset in buf: save space for n at the beginning. */ 3926 off = sizeof(*n); 3927 memset(buf, 0, sizeof(buf)); 3928 n = (struct cfg_nat *)buf; 3929 3930 av++; ac--; 3931 /* Nat id. */ 3932 if (ac && isdigit(**av)) { 3933 id = *av; 3934 i = atoi(*av); 3935 ac--; av++; 3936 n->id = i; 3937 } else 3938 errx(EX_DATAERR, "missing nat id"); 3939 if (ac == 0) 3940 errx(EX_DATAERR, "missing option"); 3941 3942 while (ac > 0) { 3943 tok = match_token(nat_params, *av); 3944 ac--; av++; 3945 switch (tok) { 3946 case TOK_IP: 3947 if (ac == 0) 3948 errx(EX_DATAERR, "missing option"); 3949 if (!inet_aton(av[0], &(n->ip))) 3950 errx(EX_DATAERR, "bad ip address ``%s''", 3951 av[0]); 3952 ac--; av++; 3953 break; 3954 case TOK_IF: 3955 set_addr_dynamic(av[0], n); 3956 ac--; av++; 3957 break; 3958 case TOK_ALOG: 3959 n->mode |= PKT_ALIAS_LOG; 3960 break; 3961 case TOK_DENY_INC: 3962 n->mode |= PKT_ALIAS_DENY_INCOMING; 3963 break; 3964 case TOK_SAME_PORTS: 3965 n->mode |= PKT_ALIAS_SAME_PORTS; 3966 break; 3967 case TOK_UNREG_ONLY: 3968 n->mode |= PKT_ALIAS_UNREGISTERED_ONLY; 3969 break; 3970 case TOK_RESET_ADDR: 3971 n->mode |= PKT_ALIAS_RESET_ON_ADDR_CHANGE; 3972 break; 3973 case TOK_ALIAS_REV: 3974 n->mode |= PKT_ALIAS_REVERSE; 3975 break; 3976 case TOK_PROXY_ONLY: 3977 n->mode |= PKT_ALIAS_PROXY_ONLY; 3978 break; 3979 /* 3980 * All the setup_redir_* functions work directly in the final 3981 * buffer, see above for details. 3982 */ 3983 case TOK_REDIR_ADDR: 3984 case TOK_REDIR_PORT: 3985 case TOK_REDIR_PROTO: 3986 switch (tok) { 3987 case TOK_REDIR_ADDR: 3988 i = setup_redir_addr(&buf[off], len, &ac, &av); 3989 break; 3990 case TOK_REDIR_PORT: 3991 i = setup_redir_port(&buf[off], len, &ac, &av); 3992 break; 3993 case TOK_REDIR_PROTO: 3994 i = setup_redir_proto(&buf[off], len, &ac, &av); 3995 break; 3996 } 3997 n->redir_cnt++; 3998 off += i; 3999 len -= i; 4000 break; 4001 default: 4002 errx(EX_DATAERR, "unrecognised option ``%s''", av[-1]); 4003 } 4004 } 4005 4006 i = do_cmd(IP_FW_NAT_CFG, buf, off); 4007 if (i) 4008 err(1, "setsockopt(%s)", "IP_FW_NAT_CFG"); 4009 4010 /* After every modification, we show the resultant rule. */ 4011 int _ac = 3; 4012 char *_av[] = {"show", "config", id}; 4013 show_nat(_ac, _av); 4014} 4015 4016static void 4017config_pipe(int ac, char **av) 4018{ 4019 struct dn_pipe p; 4020 int i; 4021 char *end; 4022 void *par = NULL; 4023 4024 memset(&p, 0, sizeof p); 4025 4026 av++; ac--; 4027 /* Pipe number */ 4028 if (ac && isdigit(**av)) { 4029 i = atoi(*av); av++; ac--; 4030 if (do_pipe == 1) 4031 p.pipe_nr = i; 4032 else 4033 p.fs.fs_nr = i; 4034 } 4035 while (ac > 0) { 4036 double d; 4037 int tok = match_token(dummynet_params, *av); 4038 ac--; av++; 4039 4040 switch(tok) { 4041 case TOK_NOERROR: 4042 p.fs.flags_fs |= DN_NOERROR; 4043 break; 4044 4045 case TOK_PLR: 4046 NEED1("plr needs argument 0..1\n"); 4047 d = strtod(av[0], NULL); 4048 if (d > 1) 4049 d = 1; 4050 else if (d < 0) 4051 d = 0; 4052 p.fs.plr = (int)(d*0x7fffffff); 4053 ac--; av++; 4054 break; 4055 4056 case TOK_QUEUE: 4057 NEED1("queue needs queue size\n"); 4058 end = NULL; 4059 p.fs.qsize = strtoul(av[0], &end, 0); 4060 if (*end == 'K' || *end == 'k') { 4061 p.fs.flags_fs |= DN_QSIZE_IS_BYTES; 4062 p.fs.qsize *= 1024; 4063 } else if (*end == 'B' || 4064 _substrcmp2(end, "by", "bytes") == 0) { 4065 p.fs.flags_fs |= DN_QSIZE_IS_BYTES; 4066 } 4067 ac--; av++; 4068 break; 4069 4070 case TOK_BUCKETS: 4071 NEED1("buckets needs argument\n"); 4072 p.fs.rq_size = strtoul(av[0], NULL, 0); 4073 ac--; av++; 4074 break; 4075 4076 case TOK_MASK: 4077 NEED1("mask needs mask specifier\n"); 4078 /* 4079 * per-flow queue, mask is dst_ip, dst_port, 4080 * src_ip, src_port, proto measured in bits 4081 */ 4082 par = NULL; 4083 4084 bzero(&p.fs.flow_mask, sizeof(p.fs.flow_mask)); 4085 end = NULL; 4086 4087 while (ac >= 1) { 4088 uint32_t *p32 = NULL; 4089 uint16_t *p16 = NULL; 4090 uint32_t *p20 = NULL; 4091 struct in6_addr *pa6 = NULL; 4092 uint32_t a; 4093 4094 tok = match_token(dummynet_params, *av); 4095 ac--; av++; 4096 switch(tok) { 4097 case TOK_ALL: 4098 /* 4099 * special case, all bits significant 4100 */ 4101 p.fs.flow_mask.dst_ip = ~0; 4102 p.fs.flow_mask.src_ip = ~0; 4103 p.fs.flow_mask.dst_port = ~0; 4104 p.fs.flow_mask.src_port = ~0; 4105 p.fs.flow_mask.proto = ~0; 4106 n2mask(&(p.fs.flow_mask.dst_ip6), 128); 4107 n2mask(&(p.fs.flow_mask.src_ip6), 128); 4108 p.fs.flow_mask.flow_id6 = ~0; 4109 p.fs.flags_fs |= DN_HAVE_FLOW_MASK; 4110 goto end_mask; 4111 4112 case TOK_DSTIP: 4113 p32 = &p.fs.flow_mask.dst_ip; 4114 break; 4115 4116 case TOK_SRCIP: 4117 p32 = &p.fs.flow_mask.src_ip; 4118 break; 4119 4120 case TOK_DSTIP6: 4121 pa6 = &(p.fs.flow_mask.dst_ip6); 4122 break; 4123 4124 case TOK_SRCIP6: 4125 pa6 = &(p.fs.flow_mask.src_ip6); 4126 break; 4127 4128 case TOK_FLOWID: 4129 p20 = &p.fs.flow_mask.flow_id6; 4130 break; 4131 4132 case TOK_DSTPORT: 4133 p16 = &p.fs.flow_mask.dst_port; 4134 break; 4135 4136 case TOK_SRCPORT: 4137 p16 = &p.fs.flow_mask.src_port; 4138 break; 4139 4140 case TOK_PROTO: 4141 break; 4142 4143 default: 4144 ac++; av--; /* backtrack */ 4145 goto end_mask; 4146 } 4147 if (ac < 1) 4148 errx(EX_USAGE, "mask: value missing"); 4149 if (*av[0] == '/') { 4150 a = strtoul(av[0]+1, &end, 0); 4151 if (pa6 == NULL) 4152 a = (a == 32) ? ~0 : (1 << a) - 1; 4153 } else 4154 a = strtoul(av[0], &end, 0); 4155 if (p32 != NULL) 4156 *p32 = a; 4157 else if (p16 != NULL) { 4158 if (a > 0xFFFF) 4159 errx(EX_DATAERR, 4160 "port mask must be 16 bit"); 4161 *p16 = (uint16_t)a; 4162 } else if (p20 != NULL) { 4163 if (a > 0xfffff) 4164 errx(EX_DATAERR, 4165 "flow_id mask must be 20 bit"); 4166 *p20 = (uint32_t)a; 4167 } else if (pa6 != NULL) { 4168 if (a < 0 || a > 128) 4169 errx(EX_DATAERR, 4170 "in6addr invalid mask len"); 4171 else 4172 n2mask(pa6, a); 4173 } else { 4174 if (a > 0xFF) 4175 errx(EX_DATAERR, 4176 "proto mask must be 8 bit"); 4177 p.fs.flow_mask.proto = (uint8_t)a; 4178 } 4179 if (a != 0) 4180 p.fs.flags_fs |= DN_HAVE_FLOW_MASK; 4181 ac--; av++; 4182 } /* end while, config masks */ 4183end_mask: 4184 break; 4185 4186 case TOK_RED: 4187 case TOK_GRED: 4188 NEED1("red/gred needs w_q/min_th/max_th/max_p\n"); 4189 p.fs.flags_fs |= DN_IS_RED; 4190 if (tok == TOK_GRED) 4191 p.fs.flags_fs |= DN_IS_GENTLE_RED; 4192 /* 4193 * the format for parameters is w_q/min_th/max_th/max_p 4194 */ 4195 if ((end = strsep(&av[0], "/"))) { 4196 double w_q = strtod(end, NULL); 4197 if (w_q > 1 || w_q <= 0) 4198 errx(EX_DATAERR, "0 < w_q <= 1"); 4199 p.fs.w_q = (int) (w_q * (1 << SCALE_RED)); 4200 } 4201 if ((end = strsep(&av[0], "/"))) { 4202 p.fs.min_th = strtoul(end, &end, 0); 4203 if (*end == 'K' || *end == 'k') 4204 p.fs.min_th *= 1024; 4205 } 4206 if ((end = strsep(&av[0], "/"))) { 4207 p.fs.max_th = strtoul(end, &end, 0); 4208 if (*end == 'K' || *end == 'k') 4209 p.fs.max_th *= 1024; 4210 } 4211 if ((end = strsep(&av[0], "/"))) { 4212 double max_p = strtod(end, NULL); 4213 if (max_p > 1 || max_p <= 0) 4214 errx(EX_DATAERR, "0 < max_p <= 1"); 4215 p.fs.max_p = (int)(max_p * (1 << SCALE_RED)); 4216 } 4217 ac--; av++; 4218 break; 4219 4220 case TOK_DROPTAIL: 4221 p.fs.flags_fs &= ~(DN_IS_RED|DN_IS_GENTLE_RED); 4222 break; 4223 4224 case TOK_BW: 4225 NEED1("bw needs bandwidth or interface\n"); 4226 if (do_pipe != 1) 4227 errx(EX_DATAERR, "bandwidth only valid for pipes"); 4228 /* 4229 * set clocking interface or bandwidth value 4230 */ 4231 if (av[0][0] >= 'a' && av[0][0] <= 'z') { 4232 int l = sizeof(p.if_name)-1; 4233 /* interface name */ 4234 strncpy(p.if_name, av[0], l); 4235 p.if_name[l] = '\0'; 4236 p.bandwidth = 0; 4237 } else { 4238 p.if_name[0] = '\0'; 4239 p.bandwidth = strtoul(av[0], &end, 0); 4240 if (*end == 'K' || *end == 'k') { 4241 end++; 4242 p.bandwidth *= 1000; 4243 } else if (*end == 'M') { 4244 end++; 4245 p.bandwidth *= 1000000; 4246 } 4247 if ((*end == 'B' && 4248 _substrcmp2(end, "Bi", "Bit/s") != 0) || 4249 _substrcmp2(end, "by", "bytes") == 0) 4250 p.bandwidth *= 8; 4251 if (p.bandwidth < 0) 4252 errx(EX_DATAERR, "bandwidth too large"); 4253 } 4254 ac--; av++; 4255 break; 4256 4257 case TOK_DELAY: 4258 if (do_pipe != 1) 4259 errx(EX_DATAERR, "delay only valid for pipes"); 4260 NEED1("delay needs argument 0..10000ms\n"); 4261 p.delay = strtoul(av[0], NULL, 0); 4262 ac--; av++; 4263 break; 4264 4265 case TOK_WEIGHT: 4266 if (do_pipe == 1) 4267 errx(EX_DATAERR,"weight only valid for queues"); 4268 NEED1("weight needs argument 0..100\n"); 4269 p.fs.weight = strtoul(av[0], &end, 0); 4270 ac--; av++; 4271 break; 4272 4273 case TOK_PIPE: 4274 if (do_pipe == 1) 4275 errx(EX_DATAERR,"pipe only valid for queues"); 4276 NEED1("pipe needs pipe_number\n"); 4277 p.fs.parent_nr = strtoul(av[0], &end, 0); 4278 ac--; av++; 4279 break; 4280 4281 default: 4282 errx(EX_DATAERR, "unrecognised option ``%s''", av[-1]); 4283 } 4284 } 4285 if (do_pipe == 1) { 4286 if (p.pipe_nr == 0) 4287 errx(EX_DATAERR, "pipe_nr must be > 0"); 4288 if (p.delay > 10000) 4289 errx(EX_DATAERR, "delay must be < 10000"); 4290 } else { /* do_pipe == 2, queue */ 4291 if (p.fs.parent_nr == 0) 4292 errx(EX_DATAERR, "pipe must be > 0"); 4293 if (p.fs.weight >100) 4294 errx(EX_DATAERR, "weight must be <= 100"); 4295 } 4296 if (p.fs.flags_fs & DN_QSIZE_IS_BYTES) { 4297 if (p.fs.qsize > 1024*1024) 4298 errx(EX_DATAERR, "queue size must be < 1MB"); 4299 } else { 4300 if (p.fs.qsize > 100) 4301 errx(EX_DATAERR, "2 <= queue size <= 100"); 4302 } 4303 if (p.fs.flags_fs & DN_IS_RED) { 4304 size_t len; 4305 int lookup_depth, avg_pkt_size; 4306 double s, idle, weight, w_q; 4307 struct clockinfo ck; 4308 int t; 4309 4310 if (p.fs.min_th >= p.fs.max_th) 4311 errx(EX_DATAERR, "min_th %d must be < than max_th %d", 4312 p.fs.min_th, p.fs.max_th); 4313 if (p.fs.max_th == 0) 4314 errx(EX_DATAERR, "max_th must be > 0"); 4315 4316 len = sizeof(int); 4317 if (sysctlbyname("net.inet.ip.dummynet.red_lookup_depth", 4318 &lookup_depth, &len, NULL, 0) == -1) 4319 4320 errx(1, "sysctlbyname(\"%s\")", 4321 "net.inet.ip.dummynet.red_lookup_depth"); 4322 if (lookup_depth == 0) 4323 errx(EX_DATAERR, "net.inet.ip.dummynet.red_lookup_depth" 4324 " must be greater than zero"); 4325 4326 len = sizeof(int); 4327 if (sysctlbyname("net.inet.ip.dummynet.red_avg_pkt_size", 4328 &avg_pkt_size, &len, NULL, 0) == -1) 4329 4330 errx(1, "sysctlbyname(\"%s\")", 4331 "net.inet.ip.dummynet.red_avg_pkt_size"); 4332 if (avg_pkt_size == 0) 4333 errx(EX_DATAERR, 4334 "net.inet.ip.dummynet.red_avg_pkt_size must" 4335 " be greater than zero"); 4336 4337 len = sizeof(struct clockinfo); 4338 if (sysctlbyname("kern.clockrate", &ck, &len, NULL, 0) == -1) 4339 errx(1, "sysctlbyname(\"%s\")", "kern.clockrate"); 4340 4341 /* 4342 * Ticks needed for sending a medium-sized packet. 4343 * Unfortunately, when we are configuring a WF2Q+ queue, we 4344 * do not have bandwidth information, because that is stored 4345 * in the parent pipe, and also we have multiple queues 4346 * competing for it. So we set s=0, which is not very 4347 * correct. But on the other hand, why do we want RED with 4348 * WF2Q+ ? 4349 */ 4350 if (p.bandwidth==0) /* this is a WF2Q+ queue */ 4351 s = 0; 4352 else 4353 s = ck.hz * avg_pkt_size * 8 / p.bandwidth; 4354 4355 /* 4356 * max idle time (in ticks) before avg queue size becomes 0. 4357 * NOTA: (3/w_q) is approx the value x so that 4358 * (1-w_q)^x < 10^-3. 4359 */ 4360 w_q = ((double)p.fs.w_q) / (1 << SCALE_RED); 4361 idle = s * 3. / w_q; 4362 p.fs.lookup_step = (int)idle / lookup_depth; 4363 if (!p.fs.lookup_step) 4364 p.fs.lookup_step = 1; 4365 weight = 1 - w_q; 4366 for (t = p.fs.lookup_step; t > 0; --t) 4367 weight *= weight; 4368 p.fs.lookup_weight = (int)(weight * (1 << SCALE_RED)); 4369 } 4370 i = do_cmd(IP_DUMMYNET_CONFIGURE, &p, sizeof p); 4371 if (i) 4372 err(1, "setsockopt(%s)", "IP_DUMMYNET_CONFIGURE"); 4373} 4374 4375static void 4376get_mac_addr_mask(char *p, uint8_t *addr, uint8_t *mask) 4377{ 4378 int i, l; 4379 4380 for (i=0; i<6; i++) 4381 addr[i] = mask[i] = 0; 4382 if (strcmp(p, "any") == 0) 4383 return; 4384 4385 for (i=0; *p && i<6;i++, p++) { 4386 addr[i] = strtol(p, &p, 16); 4387 if (*p != ':') /* we start with the mask */ 4388 break; 4389 } 4390 if (*p == '/') { /* mask len */ 4391 l = strtol(p+1, &p, 0); 4392 for (i=0; l>0; l -=8, i++) 4393 mask[i] = (l >=8) ? 0xff : (~0) << (8-l); 4394 } else if (*p == '&') { /* mask */ 4395 for (i=0, p++; *p && i<6;i++, p++) { 4396 mask[i] = strtol(p, &p, 16); 4397 if (*p != ':') 4398 break; 4399 } 4400 } else if (*p == '\0') { 4401 for (i=0; i<6; i++) 4402 mask[i] = 0xff; 4403 } 4404 for (i=0; i<6; i++) 4405 addr[i] &= mask[i]; 4406} 4407 4408/* 4409 * helper function, updates the pointer to cmd with the length 4410 * of the current command, and also cleans up the first word of 4411 * the new command in case it has been clobbered before. 4412 */ 4413static ipfw_insn * 4414next_cmd(ipfw_insn *cmd) 4415{ 4416 cmd += F_LEN(cmd); 4417 bzero(cmd, sizeof(*cmd)); 4418 return cmd; 4419} 4420 4421/* 4422 * Takes arguments and copies them into a comment 4423 */ 4424static void 4425fill_comment(ipfw_insn *cmd, int ac, char **av) 4426{ 4427 int i, l; 4428 char *p = (char *)(cmd + 1); 4429 4430 cmd->opcode = O_NOP; 4431 cmd->len = (cmd->len & (F_NOT | F_OR)); 4432 4433 /* Compute length of comment string. */ 4434 for (i = 0, l = 0; i < ac; i++) 4435 l += strlen(av[i]) + 1; 4436 if (l == 0) 4437 return; 4438 if (l > 84) 4439 errx(EX_DATAERR, 4440 "comment too long (max 80 chars)"); 4441 l = 1 + (l+3)/4; 4442 cmd->len = (cmd->len & (F_NOT | F_OR)) | l; 4443 for (i = 0; i < ac; i++) { 4444 strcpy(p, av[i]); 4445 p += strlen(av[i]); 4446 *p++ = ' '; 4447 } 4448 *(--p) = '\0'; 4449} 4450 4451/* 4452 * A function to fill simple commands of size 1. 4453 * Existing flags are preserved. 4454 */ 4455static void 4456fill_cmd(ipfw_insn *cmd, enum ipfw_opcodes opcode, int flags, uint16_t arg) 4457{ 4458 cmd->opcode = opcode; 4459 cmd->len = ((cmd->len | flags) & (F_NOT | F_OR)) | 1; 4460 cmd->arg1 = arg; 4461} 4462 4463/* 4464 * Fetch and add the MAC address and type, with masks. This generates one or 4465 * two microinstructions, and returns the pointer to the last one. 4466 */ 4467static ipfw_insn * 4468add_mac(ipfw_insn *cmd, int ac, char *av[]) 4469{ 4470 ipfw_insn_mac *mac; 4471 4472 if (ac < 2) 4473 errx(EX_DATAERR, "MAC dst src"); 4474 4475 cmd->opcode = O_MACADDR2; 4476 cmd->len = (cmd->len & (F_NOT | F_OR)) | F_INSN_SIZE(ipfw_insn_mac); 4477 4478 mac = (ipfw_insn_mac *)cmd; 4479 get_mac_addr_mask(av[0], mac->addr, mac->mask); /* dst */ 4480 get_mac_addr_mask(av[1], &(mac->addr[6]), &(mac->mask[6])); /* src */ 4481 return cmd; 4482} 4483 4484static ipfw_insn * 4485add_mactype(ipfw_insn *cmd, int ac, char *av) 4486{ 4487 if (ac < 1) 4488 errx(EX_DATAERR, "missing MAC type"); 4489 if (strcmp(av, "any") != 0) { /* we have a non-null type */ 4490 fill_newports((ipfw_insn_u16 *)cmd, av, IPPROTO_ETHERTYPE); 4491 cmd->opcode = O_MAC_TYPE; 4492 return cmd; 4493 } else 4494 return NULL; 4495} 4496 4497static ipfw_insn * 4498add_proto0(ipfw_insn *cmd, char *av, u_char *protop) 4499{ 4500 struct protoent *pe; 4501 char *ep; 4502 int proto; 4503 4504 proto = strtol(av, &ep, 10); 4505 if (*ep != '\0' || proto <= 0) { 4506 if ((pe = getprotobyname(av)) == NULL) 4507 return NULL; 4508 proto = pe->p_proto; 4509 } 4510 4511 fill_cmd(cmd, O_PROTO, 0, proto); 4512 *protop = proto; 4513 return cmd; 4514} 4515 4516static ipfw_insn * 4517add_proto(ipfw_insn *cmd, char *av, u_char *protop) 4518{ 4519 u_char proto = IPPROTO_IP; 4520 4521 if (_substrcmp(av, "all") == 0 || strcmp(av, "ip") == 0) 4522 ; /* do not set O_IP4 nor O_IP6 */ 4523 else if (strcmp(av, "ip4") == 0) 4524 /* explicit "just IPv4" rule */ 4525 fill_cmd(cmd, O_IP4, 0, 0); 4526 else if (strcmp(av, "ip6") == 0) { 4527 /* explicit "just IPv6" rule */ 4528 proto = IPPROTO_IPV6; 4529 fill_cmd(cmd, O_IP6, 0, 0); 4530 } else 4531 return add_proto0(cmd, av, protop); 4532 4533 *protop = proto; 4534 return cmd; 4535} 4536 4537static ipfw_insn * 4538add_proto_compat(ipfw_insn *cmd, char *av, u_char *protop) 4539{ 4540 u_char proto = IPPROTO_IP; 4541 4542 if (_substrcmp(av, "all") == 0 || strcmp(av, "ip") == 0) 4543 ; /* do not set O_IP4 nor O_IP6 */ 4544 else if (strcmp(av, "ipv4") == 0 || strcmp(av, "ip4") == 0) 4545 /* explicit "just IPv4" rule */ 4546 fill_cmd(cmd, O_IP4, 0, 0); 4547 else if (strcmp(av, "ipv6") == 0 || strcmp(av, "ip6") == 0) { 4548 /* explicit "just IPv6" rule */ 4549 proto = IPPROTO_IPV6; 4550 fill_cmd(cmd, O_IP6, 0, 0); 4551 } else 4552 return add_proto0(cmd, av, protop); 4553 4554 *protop = proto; 4555 return cmd; 4556} 4557 4558static ipfw_insn * 4559add_srcip(ipfw_insn *cmd, char *av) 4560{ 4561 fill_ip((ipfw_insn_ip *)cmd, av); 4562 if (cmd->opcode == O_IP_DST_SET) /* set */ 4563 cmd->opcode = O_IP_SRC_SET; 4564 else if (cmd->opcode == O_IP_DST_LOOKUP) /* table */ 4565 cmd->opcode = O_IP_SRC_LOOKUP; 4566 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn)) /* me */ 4567 cmd->opcode = O_IP_SRC_ME; 4568 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_u32)) /* one IP */ 4569 cmd->opcode = O_IP_SRC; 4570 else /* addr/mask */ 4571 cmd->opcode = O_IP_SRC_MASK; 4572 return cmd; 4573} 4574 4575static ipfw_insn * 4576add_dstip(ipfw_insn *cmd, char *av) 4577{ 4578 fill_ip((ipfw_insn_ip *)cmd, av); 4579 if (cmd->opcode == O_IP_DST_SET) /* set */ 4580 ; 4581 else if (cmd->opcode == O_IP_DST_LOOKUP) /* table */ 4582 ; 4583 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn)) /* me */ 4584 cmd->opcode = O_IP_DST_ME; 4585 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_u32)) /* one IP */ 4586 cmd->opcode = O_IP_DST; 4587 else /* addr/mask */ 4588 cmd->opcode = O_IP_DST_MASK; 4589 return cmd; 4590} 4591 4592static ipfw_insn * 4593add_ports(ipfw_insn *cmd, char *av, u_char proto, int opcode) 4594{ 4595 if (_substrcmp(av, "any") == 0) { 4596 return NULL; 4597 } else if (fill_newports((ipfw_insn_u16 *)cmd, av, proto)) { 4598 /* XXX todo: check that we have a protocol with ports */ 4599 cmd->opcode = opcode; 4600 return cmd; 4601 } 4602 return NULL; 4603} 4604 4605static ipfw_insn * 4606add_src(ipfw_insn *cmd, char *av, u_char proto) 4607{ 4608 struct in6_addr a; 4609 char *host, *ch; 4610 ipfw_insn *ret = NULL; 4611 4612 if ((host = strdup(av)) == NULL) 4613 return NULL; 4614 if ((ch = strrchr(host, '/')) != NULL) 4615 *ch = '\0'; 4616 4617 if (proto == IPPROTO_IPV6 || strcmp(av, "me6") == 0 || 4618 inet_pton(AF_INET6, host, &a)) 4619 ret = add_srcip6(cmd, av); 4620 /* XXX: should check for IPv4, not !IPv6 */ 4621 if (ret == NULL && (proto == IPPROTO_IP || strcmp(av, "me") == 0 || 4622 !inet_pton(AF_INET6, host, &a))) 4623 ret = add_srcip(cmd, av); 4624 if (ret == NULL && strcmp(av, "any") != 0) 4625 ret = cmd; 4626 4627 free(host); 4628 return ret; 4629} 4630 4631static ipfw_insn * 4632add_dst(ipfw_insn *cmd, char *av, u_char proto) 4633{ 4634 struct in6_addr a; 4635 char *host, *ch; 4636 ipfw_insn *ret = NULL; 4637 4638 if ((host = strdup(av)) == NULL) 4639 return NULL; 4640 if ((ch = strrchr(host, '/')) != NULL) 4641 *ch = '\0'; 4642 4643 if (proto == IPPROTO_IPV6 || strcmp(av, "me6") == 0 || 4644 inet_pton(AF_INET6, host, &a)) 4645 ret = add_dstip6(cmd, av); 4646 /* XXX: should check for IPv4, not !IPv6 */ 4647 if (ret == NULL && (proto == IPPROTO_IP || strcmp(av, "me") == 0 || 4648 !inet_pton(AF_INET6, host, &a))) 4649 ret = add_dstip(cmd, av); 4650 if (ret == NULL && strcmp(av, "any") != 0) 4651 ret = cmd; 4652 4653 free(host); 4654 return ret; 4655} 4656 4657/* 4658 * Parse arguments and assemble the microinstructions which make up a rule. 4659 * Rules are added into the 'rulebuf' and then copied in the correct order 4660 * into the actual rule. 4661 * 4662 * The syntax for a rule starts with the action, followed by 4663 * optional action parameters, and the various match patterns. 4664 * In the assembled microcode, the first opcode must be an O_PROBE_STATE 4665 * (generated if the rule includes a keep-state option), then the 4666 * various match patterns, log/altq actions, and the actual action. 4667 * 4668 */ 4669static void 4670add(int ac, char *av[]) 4671{ 4672 /* 4673 * rules are added into the 'rulebuf' and then copied in 4674 * the correct order into the actual rule. 4675 * Some things that need to go out of order (prob, action etc.) 4676 * go into actbuf[]. 4677 */ 4678 static uint32_t rulebuf[255], actbuf[255], cmdbuf[255]; 4679 4680 ipfw_insn *src, *dst, *cmd, *action, *prev=NULL; 4681 ipfw_insn *first_cmd; /* first match pattern */ 4682 4683 struct ip_fw *rule; 4684 4685 /* 4686 * various flags used to record that we entered some fields. 4687 */ 4688 ipfw_insn *have_state = NULL; /* check-state or keep-state */ 4689 ipfw_insn *have_log = NULL, *have_altq = NULL, *have_tag = NULL; 4690 size_t len; 4691 4692 int i; 4693 4694 int open_par = 0; /* open parenthesis ( */ 4695 4696 /* proto is here because it is used to fetch ports */ 4697 u_char proto = IPPROTO_IP; /* default protocol */ 4698 4699 double match_prob = 1; /* match probability, default is always match */ 4700 4701 bzero(actbuf, sizeof(actbuf)); /* actions go here */ 4702 bzero(cmdbuf, sizeof(cmdbuf)); 4703 bzero(rulebuf, sizeof(rulebuf)); 4704 4705 rule = (struct ip_fw *)rulebuf; 4706 cmd = (ipfw_insn *)cmdbuf; 4707 action = (ipfw_insn *)actbuf; 4708 4709 av++; ac--; 4710 4711 /* [rule N] -- Rule number optional */ 4712 if (ac && isdigit(**av)) { 4713 rule->rulenum = atoi(*av); 4714 av++; 4715 ac--; 4716 } 4717 4718 /* [set N] -- set number (0..RESVD_SET), optional */ 4719 if (ac > 1 && _substrcmp(*av, "set") == 0) { 4720 int set = strtoul(av[1], NULL, 10); 4721 if (set < 0 || set > RESVD_SET) 4722 errx(EX_DATAERR, "illegal set %s", av[1]); 4723 rule->set = set; 4724 av += 2; ac -= 2; 4725 } 4726 4727 /* [prob D] -- match probability, optional */ 4728 if (ac > 1 && _substrcmp(*av, "prob") == 0) { 4729 match_prob = strtod(av[1], NULL); 4730 4731 if (match_prob <= 0 || match_prob > 1) 4732 errx(EX_DATAERR, "illegal match prob. %s", av[1]); 4733 av += 2; ac -= 2; 4734 } 4735 4736 /* action -- mandatory */ 4737 NEED1("missing action"); 4738 i = match_token(rule_actions, *av); 4739 ac--; av++; 4740 action->len = 1; /* default */ 4741 switch(i) { 4742 case TOK_CHECKSTATE: 4743 have_state = action; 4744 action->opcode = O_CHECK_STATE; 4745 break; 4746 4747 case TOK_ACCEPT: 4748 action->opcode = O_ACCEPT; 4749 break; 4750 4751 case TOK_DENY: 4752 action->opcode = O_DENY; 4753 action->arg1 = 0; 4754 break; 4755 4756 case TOK_REJECT: 4757 action->opcode = O_REJECT; 4758 action->arg1 = ICMP_UNREACH_HOST; 4759 break; 4760 4761 case TOK_RESET: 4762 action->opcode = O_REJECT; 4763 action->arg1 = ICMP_REJECT_RST; 4764 break; 4765 4766 case TOK_RESET6: 4767 action->opcode = O_UNREACH6; 4768 action->arg1 = ICMP6_UNREACH_RST; 4769 break; 4770 4771 case TOK_UNREACH: 4772 action->opcode = O_REJECT; 4773 NEED1("missing reject code"); 4774 fill_reject_code(&action->arg1, *av); 4775 ac--; av++; 4776 break; 4777 4778 case TOK_UNREACH6: 4779 action->opcode = O_UNREACH6; 4780 NEED1("missing unreach code"); 4781 fill_unreach6_code(&action->arg1, *av); 4782 ac--; av++; 4783 break; 4784 4785 case TOK_COUNT: 4786 action->opcode = O_COUNT; 4787 break; 4788 4789 case TOK_QUEUE: 4790 action->opcode = O_QUEUE; 4791 goto chkarg; 4792 case TOK_PIPE: 4793 action->opcode = O_PIPE; 4794 goto chkarg; 4795 case TOK_SKIPTO: 4796 action->opcode = O_SKIPTO; 4797 goto chkarg; 4798 case TOK_NETGRAPH: 4799 action->opcode = O_NETGRAPH; 4800 goto chkarg; 4801 case TOK_NGTEE: 4802 action->opcode = O_NGTEE; 4803 goto chkarg; 4804 case TOK_DIVERT: 4805 action->opcode = O_DIVERT; 4806 goto chkarg; 4807 case TOK_TEE: 4808 action->opcode = O_TEE; 4809chkarg: 4810 if (!ac) 4811 errx(EX_USAGE, "missing argument for %s", *(av - 1)); 4812 if (isdigit(**av)) { 4813 action->arg1 = strtoul(*av, NULL, 10); 4814 if (action->arg1 <= 0 || action->arg1 >= IP_FW_TABLEARG) 4815 errx(EX_DATAERR, "illegal argument for %s", 4816 *(av - 1)); 4817 } else if (_substrcmp(*av, TABLEARG) == 0) { 4818 action->arg1 = IP_FW_TABLEARG; 4819 } else if (i == TOK_DIVERT || i == TOK_TEE) { 4820 struct servent *s; 4821 setservent(1); 4822 s = getservbyname(av[0], "divert"); 4823 if (s != NULL) 4824 action->arg1 = ntohs(s->s_port); 4825 else 4826 errx(EX_DATAERR, "illegal divert/tee port"); 4827 } else 4828 errx(EX_DATAERR, "illegal argument for %s", *(av - 1)); 4829 ac--; av++; 4830 break; 4831 4832 case TOK_FORWARD: { 4833 ipfw_insn_sa *p = (ipfw_insn_sa *)action; 4834 char *s, *end; 4835 4836 NEED1("missing forward address[:port]"); 4837 4838 action->opcode = O_FORWARD_IP; 4839 action->len = F_INSN_SIZE(ipfw_insn_sa); 4840 4841 p->sa.sin_len = sizeof(struct sockaddr_in); 4842 p->sa.sin_family = AF_INET; 4843 p->sa.sin_port = 0; 4844 /* 4845 * locate the address-port separator (':' or ',') 4846 */ 4847 s = strchr(*av, ':'); 4848 if (s == NULL) 4849 s = strchr(*av, ','); 4850 if (s != NULL) { 4851 *(s++) = '\0'; 4852 i = strtoport(s, &end, 0 /* base */, 0 /* proto */); 4853 if (s == end) 4854 errx(EX_DATAERR, 4855 "illegal forwarding port ``%s''", s); 4856 p->sa.sin_port = (u_short)i; 4857 } 4858 if (_substrcmp(*av, "tablearg") == 0) 4859 p->sa.sin_addr.s_addr = INADDR_ANY; 4860 else 4861 lookup_host(*av, &(p->sa.sin_addr)); 4862 ac--; av++; 4863 break; 4864 } 4865 case TOK_COMMENT: 4866 /* pretend it is a 'count' rule followed by the comment */ 4867 action->opcode = O_COUNT; 4868 ac++; av--; /* go back... */ 4869 break; 4870 4871 case TOK_NAT: 4872 action->opcode = O_NAT; 4873 action->len = F_INSN_SIZE(ipfw_insn_nat); 4874 NEED1("missing nat number"); 4875 action->arg1 = strtoul(*av, NULL, 10); 4876 ac--; av++; 4877 break; 4878 4879 default: 4880 errx(EX_DATAERR, "invalid action %s\n", av[-1]); 4881 } 4882 action = next_cmd(action); 4883 4884 /* 4885 * [altq queuename] -- altq tag, optional 4886 * [log [logamount N]] -- log, optional 4887 * 4888 * If they exist, it go first in the cmdbuf, but then it is 4889 * skipped in the copy section to the end of the buffer. 4890 */ 4891 while (ac != 0 && (i = match_token(rule_action_params, *av)) != -1) { 4892 ac--; av++; 4893 switch (i) { 4894 case TOK_LOG: 4895 { 4896 ipfw_insn_log *c = (ipfw_insn_log *)cmd; 4897 int l; 4898 4899 if (have_log) 4900 errx(EX_DATAERR, 4901 "log cannot be specified more than once"); 4902 have_log = (ipfw_insn *)c; 4903 cmd->len = F_INSN_SIZE(ipfw_insn_log); 4904 cmd->opcode = O_LOG; 4905 if (ac && _substrcmp(*av, "logamount") == 0) { 4906 ac--; av++; 4907 NEED1("logamount requires argument"); 4908 l = atoi(*av); 4909 if (l < 0) 4910 errx(EX_DATAERR, 4911 "logamount must be positive"); 4912 c->max_log = l; 4913 ac--; av++; 4914 } else { 4915 len = sizeof(c->max_log); 4916 if (sysctlbyname("net.inet.ip.fw.verbose_limit", 4917 &c->max_log, &len, NULL, 0) == -1) 4918 errx(1, "sysctlbyname(\"%s\")", 4919 "net.inet.ip.fw.verbose_limit"); 4920 } 4921 } 4922 break; 4923 4924 case TOK_ALTQ: 4925 { 4926 ipfw_insn_altq *a = (ipfw_insn_altq *)cmd; 4927 4928 NEED1("missing altq queue name"); 4929 if (have_altq) 4930 errx(EX_DATAERR, 4931 "altq cannot be specified more than once"); 4932 have_altq = (ipfw_insn *)a; 4933 cmd->len = F_INSN_SIZE(ipfw_insn_altq); 4934 cmd->opcode = O_ALTQ; 4935 fill_altq_qid(&a->qid, *av); 4936 ac--; av++; 4937 } 4938 break; 4939 4940 case TOK_TAG: 4941 case TOK_UNTAG: { 4942 uint16_t tag; 4943 4944 if (have_tag) 4945 errx(EX_USAGE, "tag and untag cannot be " 4946 "specified more than once"); 4947 GET_UINT_ARG(tag, 1, 65534, i, rule_action_params); 4948 have_tag = cmd; 4949 fill_cmd(cmd, O_TAG, (i == TOK_TAG) ? 0: F_NOT, tag); 4950 ac--; av++; 4951 break; 4952 } 4953 4954 default: 4955 abort(); 4956 } 4957 cmd = next_cmd(cmd); 4958 } 4959 4960 if (have_state) /* must be a check-state, we are done */ 4961 goto done; 4962 4963#define OR_START(target) \ 4964 if (ac && (*av[0] == '(' || *av[0] == '{')) { \ 4965 if (open_par) \ 4966 errx(EX_USAGE, "nested \"(\" not allowed\n"); \ 4967 prev = NULL; \ 4968 open_par = 1; \ 4969 if ( (av[0])[1] == '\0') { \ 4970 ac--; av++; \ 4971 } else \ 4972 (*av)++; \ 4973 } \ 4974 target: \ 4975 4976 4977#define CLOSE_PAR \ 4978 if (open_par) { \ 4979 if (ac && ( \ 4980 strcmp(*av, ")") == 0 || \ 4981 strcmp(*av, "}") == 0)) { \ 4982 prev = NULL; \ 4983 open_par = 0; \ 4984 ac--; av++; \ 4985 } else \ 4986 errx(EX_USAGE, "missing \")\"\n"); \ 4987 } 4988 4989#define NOT_BLOCK \ 4990 if (ac && _substrcmp(*av, "not") == 0) { \ 4991 if (cmd->len & F_NOT) \ 4992 errx(EX_USAGE, "double \"not\" not allowed\n"); \ 4993 cmd->len |= F_NOT; \ 4994 ac--; av++; \ 4995 } 4996 4997#define OR_BLOCK(target) \ 4998 if (ac && _substrcmp(*av, "or") == 0) { \ 4999 if (prev == NULL || open_par == 0) \ 5000 errx(EX_DATAERR, "invalid OR block"); \ 5001 prev->len |= F_OR; \ 5002 ac--; av++; \ 5003 goto target; \ 5004 } \ 5005 CLOSE_PAR; 5006 5007 first_cmd = cmd; 5008 5009#if 0 5010 /* 5011 * MAC addresses, optional. 5012 * If we have this, we skip the part "proto from src to dst" 5013 * and jump straight to the option parsing. 5014 */ 5015 NOT_BLOCK; 5016 NEED1("missing protocol"); 5017 if (_substrcmp(*av, "MAC") == 0 || 5018 _substrcmp(*av, "mac") == 0) { 5019 ac--; av++; /* the "MAC" keyword */ 5020 add_mac(cmd, ac, av); /* exits in case of errors */ 5021 cmd = next_cmd(cmd); 5022 ac -= 2; av += 2; /* dst-mac and src-mac */ 5023 NOT_BLOCK; 5024 NEED1("missing mac type"); 5025 if (add_mactype(cmd, ac, av[0])) 5026 cmd = next_cmd(cmd); 5027 ac--; av++; /* any or mac-type */ 5028 goto read_options; 5029 } 5030#endif 5031 5032 /* 5033 * protocol, mandatory 5034 */ 5035 OR_START(get_proto); 5036 NOT_BLOCK; 5037 NEED1("missing protocol"); 5038 if (add_proto_compat(cmd, *av, &proto)) { 5039 av++; ac--; 5040 if (F_LEN(cmd) != 0) { 5041 prev = cmd; 5042 cmd = next_cmd(cmd); 5043 } 5044 } else if (first_cmd != cmd) { 5045 errx(EX_DATAERR, "invalid protocol ``%s''", *av); 5046 } else 5047 goto read_options; 5048 OR_BLOCK(get_proto); 5049 5050 /* 5051 * "from", mandatory 5052 */ 5053 if (!ac || _substrcmp(*av, "from") != 0) 5054 errx(EX_USAGE, "missing ``from''"); 5055 ac--; av++; 5056 5057 /* 5058 * source IP, mandatory 5059 */ 5060 OR_START(source_ip); 5061 NOT_BLOCK; /* optional "not" */ 5062 NEED1("missing source address"); 5063 if (add_src(cmd, *av, proto)) { 5064 ac--; av++; 5065 if (F_LEN(cmd) != 0) { /* ! any */ 5066 prev = cmd; 5067 cmd = next_cmd(cmd); 5068 } 5069 } else 5070 errx(EX_USAGE, "bad source address %s", *av); 5071 OR_BLOCK(source_ip); 5072 5073 /* 5074 * source ports, optional 5075 */ 5076 NOT_BLOCK; /* optional "not" */ 5077 if (ac) { 5078 if (_substrcmp(*av, "any") == 0 || 5079 add_ports(cmd, *av, proto, O_IP_SRCPORT)) { 5080 ac--; av++; 5081 if (F_LEN(cmd) != 0) 5082 cmd = next_cmd(cmd); 5083 } 5084 } 5085 5086 /* 5087 * "to", mandatory 5088 */ 5089 if (!ac || _substrcmp(*av, "to") != 0) 5090 errx(EX_USAGE, "missing ``to''"); 5091 av++; ac--; 5092 5093 /* 5094 * destination, mandatory 5095 */ 5096 OR_START(dest_ip); 5097 NOT_BLOCK; /* optional "not" */ 5098 NEED1("missing dst address"); 5099 if (add_dst(cmd, *av, proto)) { 5100 ac--; av++; 5101 if (F_LEN(cmd) != 0) { /* ! any */ 5102 prev = cmd; 5103 cmd = next_cmd(cmd); 5104 } 5105 } else 5106 errx( EX_USAGE, "bad destination address %s", *av); 5107 OR_BLOCK(dest_ip); 5108 5109 /* 5110 * dest. ports, optional 5111 */ 5112 NOT_BLOCK; /* optional "not" */ 5113 if (ac) { 5114 if (_substrcmp(*av, "any") == 0 || 5115 add_ports(cmd, *av, proto, O_IP_DSTPORT)) { 5116 ac--; av++; 5117 if (F_LEN(cmd) != 0) 5118 cmd = next_cmd(cmd); 5119 } 5120 } 5121 5122read_options: 5123 if (ac && first_cmd == cmd) { 5124 /* 5125 * nothing specified so far, store in the rule to ease 5126 * printout later. 5127 */ 5128 rule->_pad = 1; 5129 } 5130 prev = NULL; 5131 while (ac) { 5132 char *s; 5133 ipfw_insn_u32 *cmd32; /* alias for cmd */ 5134 5135 s = *av; 5136 cmd32 = (ipfw_insn_u32 *)cmd; 5137 5138 if (*s == '!') { /* alternate syntax for NOT */ 5139 if (cmd->len & F_NOT) 5140 errx(EX_USAGE, "double \"not\" not allowed\n"); 5141 cmd->len = F_NOT; 5142 s++; 5143 } 5144 i = match_token(rule_options, s); 5145 ac--; av++; 5146 switch(i) { 5147 case TOK_NOT: 5148 if (cmd->len & F_NOT) 5149 errx(EX_USAGE, "double \"not\" not allowed\n"); 5150 cmd->len = F_NOT; 5151 break; 5152 5153 case TOK_OR: 5154 if (open_par == 0 || prev == NULL) 5155 errx(EX_USAGE, "invalid \"or\" block\n"); 5156 prev->len |= F_OR; 5157 break; 5158 5159 case TOK_STARTBRACE: 5160 if (open_par) 5161 errx(EX_USAGE, "+nested \"(\" not allowed\n"); 5162 open_par = 1; 5163 break; 5164 5165 case TOK_ENDBRACE: 5166 if (!open_par) 5167 errx(EX_USAGE, "+missing \")\"\n"); 5168 open_par = 0; 5169 prev = NULL; 5170 break; 5171 5172 case TOK_IN: 5173 fill_cmd(cmd, O_IN, 0, 0); 5174 break; 5175 5176 case TOK_OUT: 5177 cmd->len ^= F_NOT; /* toggle F_NOT */ 5178 fill_cmd(cmd, O_IN, 0, 0); 5179 break; 5180 5181 case TOK_DIVERTED: 5182 fill_cmd(cmd, O_DIVERTED, 0, 3); 5183 break; 5184 5185 case TOK_DIVERTEDLOOPBACK: 5186 fill_cmd(cmd, O_DIVERTED, 0, 1); 5187 break; 5188 5189 case TOK_DIVERTEDOUTPUT: 5190 fill_cmd(cmd, O_DIVERTED, 0, 2); 5191 break; 5192 5193 case TOK_FRAG: 5194 fill_cmd(cmd, O_FRAG, 0, 0); 5195 break; 5196 5197 case TOK_LAYER2: 5198 fill_cmd(cmd, O_LAYER2, 0, 0); 5199 break; 5200 5201 case TOK_XMIT: 5202 case TOK_RECV: 5203 case TOK_VIA: 5204 NEED1("recv, xmit, via require interface name" 5205 " or address"); 5206 fill_iface((ipfw_insn_if *)cmd, av[0]); 5207 ac--; av++; 5208 if (F_LEN(cmd) == 0) /* not a valid address */ 5209 break; 5210 if (i == TOK_XMIT) 5211 cmd->opcode = O_XMIT; 5212 else if (i == TOK_RECV) 5213 cmd->opcode = O_RECV; 5214 else if (i == TOK_VIA) 5215 cmd->opcode = O_VIA; 5216 break; 5217 5218 case TOK_ICMPTYPES: 5219 NEED1("icmptypes requires list of types"); 5220 fill_icmptypes((ipfw_insn_u32 *)cmd, *av); 5221 av++; ac--; 5222 break; 5223 5224 case TOK_ICMP6TYPES: 5225 NEED1("icmptypes requires list of types"); 5226 fill_icmp6types((ipfw_insn_icmp6 *)cmd, *av); 5227 av++; ac--; 5228 break; 5229 5230 case TOK_IPTTL: 5231 NEED1("ipttl requires TTL"); 5232 if (strpbrk(*av, "-,")) { 5233 if (!add_ports(cmd, *av, 0, O_IPTTL)) 5234 errx(EX_DATAERR, "invalid ipttl %s", *av); 5235 } else 5236 fill_cmd(cmd, O_IPTTL, 0, strtoul(*av, NULL, 0)); 5237 ac--; av++; 5238 break; 5239 5240 case TOK_IPID: 5241 NEED1("ipid requires id"); 5242 if (strpbrk(*av, "-,")) { 5243 if (!add_ports(cmd, *av, 0, O_IPID)) 5244 errx(EX_DATAERR, "invalid ipid %s", *av); 5245 } else 5246 fill_cmd(cmd, O_IPID, 0, strtoul(*av, NULL, 0)); 5247 ac--; av++; 5248 break; 5249 5250 case TOK_IPLEN: 5251 NEED1("iplen requires length"); 5252 if (strpbrk(*av, "-,")) { 5253 if (!add_ports(cmd, *av, 0, O_IPLEN)) 5254 errx(EX_DATAERR, "invalid ip len %s", *av); 5255 } else 5256 fill_cmd(cmd, O_IPLEN, 0, strtoul(*av, NULL, 0)); 5257 ac--; av++; 5258 break; 5259 5260 case TOK_IPVER: 5261 NEED1("ipver requires version"); 5262 fill_cmd(cmd, O_IPVER, 0, strtoul(*av, NULL, 0)); 5263 ac--; av++; 5264 break; 5265 5266 case TOK_IPPRECEDENCE: 5267 NEED1("ipprecedence requires value"); 5268 fill_cmd(cmd, O_IPPRECEDENCE, 0, 5269 (strtoul(*av, NULL, 0) & 7) << 5); 5270 ac--; av++; 5271 break; 5272 5273 case TOK_IPOPTS: 5274 NEED1("missing argument for ipoptions"); 5275 fill_flags(cmd, O_IPOPT, f_ipopts, *av); 5276 ac--; av++; 5277 break; 5278 5279 case TOK_IPTOS: 5280 NEED1("missing argument for iptos"); 5281 fill_flags(cmd, O_IPTOS, f_iptos, *av); 5282 ac--; av++; 5283 break; 5284 5285 case TOK_UID: 5286 NEED1("uid requires argument"); 5287 { 5288 char *end; 5289 uid_t uid; 5290 struct passwd *pwd; 5291 5292 cmd->opcode = O_UID; 5293 uid = strtoul(*av, &end, 0); 5294 pwd = (*end == '\0') ? getpwuid(uid) : getpwnam(*av); 5295 if (pwd == NULL) 5296 errx(EX_DATAERR, "uid \"%s\" nonexistent", *av); 5297 cmd32->d[0] = pwd->pw_uid; 5298 cmd->len |= F_INSN_SIZE(ipfw_insn_u32); 5299 ac--; av++; 5300 } 5301 break; 5302 5303 case TOK_GID: 5304 NEED1("gid requires argument"); 5305 { 5306 char *end; 5307 gid_t gid; 5308 struct group *grp; 5309 5310 cmd->opcode = O_GID; 5311 gid = strtoul(*av, &end, 0); 5312 grp = (*end == '\0') ? getgrgid(gid) : getgrnam(*av); 5313 if (grp == NULL) 5314 errx(EX_DATAERR, "gid \"%s\" nonexistent", *av); 5315 cmd32->d[0] = grp->gr_gid; 5316 cmd->len |= F_INSN_SIZE(ipfw_insn_u32); 5317 ac--; av++; 5318 } 5319 break; 5320 5321 case TOK_JAIL: 5322 NEED1("jail requires argument"); 5323 { 5324 char *end; 5325 int jid; 5326 5327 cmd->opcode = O_JAIL; 5328 jid = (int)strtol(*av, &end, 0); 5329 if (jid < 0 || *end != '\0') 5330 errx(EX_DATAERR, "jail requires prison ID"); 5331 cmd32->d[0] = (uint32_t)jid; 5332 cmd->len |= F_INSN_SIZE(ipfw_insn_u32); 5333 ac--; av++; 5334 } 5335 break; 5336 5337 case TOK_ESTAB: 5338 fill_cmd(cmd, O_ESTAB, 0, 0); 5339 break; 5340 5341 case TOK_SETUP: 5342 fill_cmd(cmd, O_TCPFLAGS, 0, 5343 (TH_SYN) | ( (TH_ACK) & 0xff) <<8 ); 5344 break; 5345 5346 case TOK_TCPDATALEN: 5347 NEED1("tcpdatalen requires length"); 5348 if (strpbrk(*av, "-,")) { 5349 if (!add_ports(cmd, *av, 0, O_TCPDATALEN)) 5350 errx(EX_DATAERR, "invalid tcpdata len %s", *av); 5351 } else 5352 fill_cmd(cmd, O_TCPDATALEN, 0, 5353 strtoul(*av, NULL, 0)); 5354 ac--; av++; 5355 break; 5356 5357 case TOK_TCPOPTS: 5358 NEED1("missing argument for tcpoptions"); 5359 fill_flags(cmd, O_TCPOPTS, f_tcpopts, *av); 5360 ac--; av++; 5361 break; 5362 5363 case TOK_TCPSEQ: 5364 case TOK_TCPACK: 5365 NEED1("tcpseq/tcpack requires argument"); 5366 cmd->len = F_INSN_SIZE(ipfw_insn_u32); 5367 cmd->opcode = (i == TOK_TCPSEQ) ? O_TCPSEQ : O_TCPACK; 5368 cmd32->d[0] = htonl(strtoul(*av, NULL, 0)); 5369 ac--; av++; 5370 break; 5371 5372 case TOK_TCPWIN: 5373 NEED1("tcpwin requires length"); 5374 fill_cmd(cmd, O_TCPWIN, 0, 5375 htons(strtoul(*av, NULL, 0))); 5376 ac--; av++; 5377 break; 5378 5379 case TOK_TCPFLAGS: 5380 NEED1("missing argument for tcpflags"); 5381 cmd->opcode = O_TCPFLAGS; 5382 fill_flags(cmd, O_TCPFLAGS, f_tcpflags, *av); 5383 ac--; av++; 5384 break; 5385 5386 case TOK_KEEPSTATE: 5387 if (open_par) 5388 errx(EX_USAGE, "keep-state cannot be part " 5389 "of an or block"); 5390 if (have_state) 5391 errx(EX_USAGE, "only one of keep-state " 5392 "and limit is allowed"); 5393 have_state = cmd; 5394 fill_cmd(cmd, O_KEEP_STATE, 0, 0); 5395 break; 5396 5397 case TOK_LIMIT: { 5398 ipfw_insn_limit *c = (ipfw_insn_limit *)cmd; 5399 int val; 5400 5401 if (open_par) 5402 errx(EX_USAGE, 5403 "limit cannot be part of an or block"); 5404 if (have_state) 5405 errx(EX_USAGE, "only one of keep-state and " 5406 "limit is allowed"); 5407 have_state = cmd; 5408 5409 cmd->len = F_INSN_SIZE(ipfw_insn_limit); 5410 cmd->opcode = O_LIMIT; 5411 c->limit_mask = c->conn_limit = 0; 5412 5413 while (ac > 0) { 5414 if ((val = match_token(limit_masks, *av)) <= 0) 5415 break; 5416 c->limit_mask |= val; 5417 ac--; av++; 5418 } 5419 5420 if (c->limit_mask == 0) 5421 errx(EX_USAGE, "limit: missing limit mask"); 5422 5423 GET_UINT_ARG(c->conn_limit, 1, 65534, TOK_LIMIT, 5424 rule_options); 5425 5426 ac--; av++; 5427 break; 5428 } 5429 5430 case TOK_PROTO: 5431 NEED1("missing protocol"); 5432 if (add_proto(cmd, *av, &proto)) { 5433 ac--; av++; 5434 } else 5435 errx(EX_DATAERR, "invalid protocol ``%s''", 5436 *av); 5437 break; 5438 5439 case TOK_SRCIP: 5440 NEED1("missing source IP"); 5441 if (add_srcip(cmd, *av)) { 5442 ac--; av++; 5443 } 5444 break; 5445 5446 case TOK_DSTIP: 5447 NEED1("missing destination IP"); 5448 if (add_dstip(cmd, *av)) { 5449 ac--; av++; 5450 } 5451 break; 5452 5453 case TOK_SRCIP6: 5454 NEED1("missing source IP6"); 5455 if (add_srcip6(cmd, *av)) { 5456 ac--; av++; 5457 } 5458 break; 5459 5460 case TOK_DSTIP6: 5461 NEED1("missing destination IP6"); 5462 if (add_dstip6(cmd, *av)) { 5463 ac--; av++; 5464 } 5465 break; 5466 5467 case TOK_SRCPORT: 5468 NEED1("missing source port"); 5469 if (_substrcmp(*av, "any") == 0 || 5470 add_ports(cmd, *av, proto, O_IP_SRCPORT)) { 5471 ac--; av++; 5472 } else 5473 errx(EX_DATAERR, "invalid source port %s", *av); 5474 break; 5475 5476 case TOK_DSTPORT: 5477 NEED1("missing destination port"); 5478 if (_substrcmp(*av, "any") == 0 || 5479 add_ports(cmd, *av, proto, O_IP_DSTPORT)) { 5480 ac--; av++; 5481 } else 5482 errx(EX_DATAERR, "invalid destination port %s", 5483 *av); 5484 break; 5485 5486 case TOK_MAC: 5487 if (add_mac(cmd, ac, av)) { 5488 ac -= 2; av += 2; 5489 } 5490 break; 5491 5492 case TOK_MACTYPE: 5493 NEED1("missing mac type"); 5494 if (!add_mactype(cmd, ac, *av)) 5495 errx(EX_DATAERR, "invalid mac type %s", *av); 5496 ac--; av++; 5497 break; 5498 5499 case TOK_VERREVPATH: 5500 fill_cmd(cmd, O_VERREVPATH, 0, 0); 5501 break; 5502 5503 case TOK_VERSRCREACH: 5504 fill_cmd(cmd, O_VERSRCREACH, 0, 0); 5505 break; 5506 5507 case TOK_ANTISPOOF: 5508 fill_cmd(cmd, O_ANTISPOOF, 0, 0); 5509 break; 5510 5511 case TOK_IPSEC: 5512 fill_cmd(cmd, O_IPSEC, 0, 0); 5513 break; 5514 5515 case TOK_IPV6: 5516 fill_cmd(cmd, O_IP6, 0, 0); 5517 break; 5518 5519 case TOK_IPV4: 5520 fill_cmd(cmd, O_IP4, 0, 0); 5521 break; 5522 5523 case TOK_EXT6HDR: 5524 fill_ext6hdr( cmd, *av ); 5525 ac--; av++; 5526 break; 5527 5528 case TOK_FLOWID: 5529 if (proto != IPPROTO_IPV6 ) 5530 errx( EX_USAGE, "flow-id filter is active " 5531 "only for ipv6 protocol\n"); 5532 fill_flow6( (ipfw_insn_u32 *) cmd, *av ); 5533 ac--; av++; 5534 break; 5535 5536 case TOK_COMMENT: 5537 fill_comment(cmd, ac, av); 5538 av += ac; 5539 ac = 0; 5540 break; 5541 5542 case TOK_TAGGED: 5543 if (ac > 0 && strpbrk(*av, "-,")) { 5544 if (!add_ports(cmd, *av, 0, O_TAGGED)) 5545 errx(EX_DATAERR, "tagged: invalid tag" 5546 " list: %s", *av); 5547 } 5548 else { 5549 uint16_t tag; 5550 5551 GET_UINT_ARG(tag, 1, 65534, TOK_TAGGED, 5552 rule_options); 5553 fill_cmd(cmd, O_TAGGED, 0, tag); 5554 } 5555 ac--; av++; 5556 break; 5557 5558 default: 5559 errx(EX_USAGE, "unrecognised option [%d] %s\n", i, s); 5560 } 5561 if (F_LEN(cmd) > 0) { /* prepare to advance */ 5562 prev = cmd; 5563 cmd = next_cmd(cmd); 5564 } 5565 } 5566 5567done: 5568 /* 5569 * Now copy stuff into the rule. 5570 * If we have a keep-state option, the first instruction 5571 * must be a PROBE_STATE (which is generated here). 5572 * If we have a LOG option, it was stored as the first command, 5573 * and now must be moved to the top of the action part. 5574 */ 5575 dst = (ipfw_insn *)rule->cmd; 5576 5577 /* 5578 * First thing to write into the command stream is the match probability. 5579 */ 5580 if (match_prob != 1) { /* 1 means always match */ 5581 dst->opcode = O_PROB; 5582 dst->len = 2; 5583 *((int32_t *)(dst+1)) = (int32_t)(match_prob * 0x7fffffff); 5584 dst += dst->len; 5585 } 5586 5587 /* 5588 * generate O_PROBE_STATE if necessary 5589 */ 5590 if (have_state && have_state->opcode != O_CHECK_STATE) { 5591 fill_cmd(dst, O_PROBE_STATE, 0, 0); 5592 dst = next_cmd(dst); 5593 } 5594 5595 /* copy all commands but O_LOG, O_KEEP_STATE, O_LIMIT, O_ALTQ, O_TAG */ 5596 for (src = (ipfw_insn *)cmdbuf; src != cmd; src += i) { 5597 i = F_LEN(src); 5598 5599 switch (src->opcode) { 5600 case O_LOG: 5601 case O_KEEP_STATE: 5602 case O_LIMIT: 5603 case O_ALTQ: 5604 case O_TAG: 5605 break; 5606 default: 5607 bcopy(src, dst, i * sizeof(uint32_t)); 5608 dst += i; 5609 } 5610 } 5611 5612 /* 5613 * put back the have_state command as last opcode 5614 */ 5615 if (have_state && have_state->opcode != O_CHECK_STATE) { 5616 i = F_LEN(have_state); 5617 bcopy(have_state, dst, i * sizeof(uint32_t)); 5618 dst += i; 5619 } 5620 /* 5621 * start action section 5622 */ 5623 rule->act_ofs = dst - rule->cmd; 5624 5625 /* put back O_LOG, O_ALTQ, O_TAG if necessary */ 5626 if (have_log) { 5627 i = F_LEN(have_log); 5628 bcopy(have_log, dst, i * sizeof(uint32_t)); 5629 dst += i; 5630 } 5631 if (have_altq) { 5632 i = F_LEN(have_altq); 5633 bcopy(have_altq, dst, i * sizeof(uint32_t)); 5634 dst += i; 5635 } 5636 if (have_tag) { 5637 i = F_LEN(have_tag); 5638 bcopy(have_tag, dst, i * sizeof(uint32_t)); 5639 dst += i; 5640 } 5641 /* 5642 * copy all other actions 5643 */ 5644 for (src = (ipfw_insn *)actbuf; src != action; src += i) { 5645 i = F_LEN(src); 5646 bcopy(src, dst, i * sizeof(uint32_t)); 5647 dst += i; 5648 } 5649 5650 rule->cmd_len = (uint32_t *)dst - (uint32_t *)(rule->cmd); 5651 i = (char *)dst - (char *)rule; 5652 if (do_cmd(IP_FW_ADD, rule, (uintptr_t)&i) == -1) 5653 err(EX_UNAVAILABLE, "getsockopt(%s)", "IP_FW_ADD"); 5654 if (!do_quiet) 5655 show_ipfw(rule, 0, 0); 5656} 5657 5658static void 5659zero(int ac, char *av[], int optname /* IP_FW_ZERO or IP_FW_RESETLOG */) 5660{ 5661 int rulenum; 5662 int failed = EX_OK; 5663 char const *name = optname == IP_FW_ZERO ? "ZERO" : "RESETLOG"; 5664 5665 av++; ac--; 5666 5667 if (!ac) { 5668 /* clear all entries */ 5669 if (do_cmd(optname, NULL, 0) < 0) 5670 err(EX_UNAVAILABLE, "setsockopt(IP_FW_%s)", name); 5671 if (!do_quiet) 5672 printf("%s.\n", optname == IP_FW_ZERO ? 5673 "Accounting cleared":"Logging counts reset"); 5674 5675 return; 5676 } 5677 5678 while (ac) { 5679 /* Rule number */ 5680 if (isdigit(**av)) { 5681 rulenum = atoi(*av); 5682 av++; 5683 ac--; 5684 if (do_cmd(optname, &rulenum, sizeof rulenum)) { 5685 warn("rule %u: setsockopt(IP_FW_%s)", 5686 rulenum, name); 5687 failed = EX_UNAVAILABLE; 5688 } else if (!do_quiet) 5689 printf("Entry %d %s.\n", rulenum, 5690 optname == IP_FW_ZERO ? 5691 "cleared" : "logging count reset"); 5692 } else { 5693 errx(EX_USAGE, "invalid rule number ``%s''", *av); 5694 } 5695 } 5696 if (failed != EX_OK) 5697 exit(failed); 5698} 5699 5700static void 5701flush(int force) 5702{ 5703 int cmd = do_pipe ? IP_DUMMYNET_FLUSH : IP_FW_FLUSH; 5704 5705 if (!force && !do_quiet) { /* need to ask user */ 5706 int c; 5707 5708 printf("Are you sure? [yn] "); 5709 fflush(stdout); 5710 do { 5711 c = toupper(getc(stdin)); 5712 while (c != '\n' && getc(stdin) != '\n') 5713 if (feof(stdin)) 5714 return; /* and do not flush */ 5715 } while (c != 'Y' && c != 'N'); 5716 printf("\n"); 5717 if (c == 'N') /* user said no */ 5718 return; 5719 } 5720 if (do_cmd(cmd, NULL, 0) < 0) 5721 err(EX_UNAVAILABLE, "setsockopt(IP_%s_FLUSH)", 5722 do_pipe ? "DUMMYNET" : "FW"); 5723 if (!do_quiet) 5724 printf("Flushed all %s.\n", do_pipe ? "pipes" : "rules"); 5725} 5726 5727/* 5728 * Free a the (locally allocated) copy of command line arguments. 5729 */ 5730static void 5731free_args(int ac, char **av) 5732{ 5733 int i; 5734 5735 for (i=0; i < ac; i++) 5736 free(av[i]); 5737 free(av); 5738} 5739 5740/* 5741 * This one handles all table-related commands 5742 * ipfw table N add addr[/masklen] [value] 5743 * ipfw table N delete addr[/masklen] 5744 * ipfw table N flush 5745 * ipfw table N list 5746 */ 5747static void 5748table_handler(int ac, char *av[]) 5749{ 5750 ipfw_table_entry ent; 5751 ipfw_table *tbl; 5752 int do_add; 5753 char *p; 5754 socklen_t l; 5755 uint32_t a; 5756 5757 ac--; av++; 5758 if (ac && isdigit(**av)) { 5759 ent.tbl = atoi(*av); 5760 ac--; av++; 5761 } else 5762 errx(EX_USAGE, "table number required"); 5763 NEED1("table needs command"); 5764 if (_substrcmp(*av, "add") == 0 || 5765 _substrcmp(*av, "delete") == 0) { 5766 do_add = **av == 'a'; 5767 ac--; av++; 5768 if (!ac) 5769 errx(EX_USAGE, "IP address required"); 5770 p = strchr(*av, '/'); 5771 if (p) { 5772 *p++ = '\0'; 5773 ent.masklen = atoi(p); 5774 if (ent.masklen > 32) 5775 errx(EX_DATAERR, "bad width ``%s''", p); 5776 } else 5777 ent.masklen = 32; 5778 if (lookup_host(*av, (struct in_addr *)&ent.addr) != 0) 5779 errx(EX_NOHOST, "hostname ``%s'' unknown", *av); 5780 ac--; av++; 5781 if (do_add && ac) { 5782 unsigned int tval; 5783 /* isdigit is a bit of a hack here.. */ 5784 if (strchr(*av, (int)'.') == NULL && isdigit(**av)) { 5785 ent.value = strtoul(*av, NULL, 0); 5786 } else { 5787 if (lookup_host(*av, (struct in_addr *)&tval) == 0) { 5788 /* The value must be stored in host order * 5789 * so that the values < 65k can be distinguished */ 5790 ent.value = ntohl(tval); 5791 } else { 5792 errx(EX_NOHOST, "hostname ``%s'' unknown", *av); 5793 } 5794 } 5795 } else 5796 ent.value = 0; 5797 if (do_cmd(do_add ? IP_FW_TABLE_ADD : IP_FW_TABLE_DEL, 5798 &ent, sizeof(ent)) < 0) { 5799 /* If running silent, don't bomb out on these errors. */ 5800 if (!(do_quiet && (errno == (do_add ? EEXIST : ESRCH)))) 5801 err(EX_OSERR, "setsockopt(IP_FW_TABLE_%s)", 5802 do_add ? "ADD" : "DEL"); 5803 /* In silent mode, react to a failed add by deleting */ 5804 if (do_add) { 5805 do_cmd(IP_FW_TABLE_DEL, &ent, sizeof(ent)); 5806 if (do_cmd(IP_FW_TABLE_ADD, 5807 &ent, sizeof(ent)) < 0) 5808 err(EX_OSERR, 5809 "setsockopt(IP_FW_TABLE_ADD)"); 5810 } 5811 } 5812 } else if (_substrcmp(*av, "flush") == 0) { 5813 if (do_cmd(IP_FW_TABLE_FLUSH, &ent.tbl, sizeof(ent.tbl)) < 0) 5814 err(EX_OSERR, "setsockopt(IP_FW_TABLE_FLUSH)"); 5815 } else if (_substrcmp(*av, "list") == 0) { 5816 a = ent.tbl; 5817 l = sizeof(a); 5818 if (do_cmd(IP_FW_TABLE_GETSIZE, &a, (uintptr_t)&l) < 0) 5819 err(EX_OSERR, "getsockopt(IP_FW_TABLE_GETSIZE)"); 5820 l = sizeof(*tbl) + a * sizeof(ipfw_table_entry); 5821 tbl = malloc(l); 5822 if (tbl == NULL) 5823 err(EX_OSERR, "malloc"); 5824 tbl->tbl = ent.tbl; 5825 if (do_cmd(IP_FW_TABLE_LIST, tbl, (uintptr_t)&l) < 0) 5826 err(EX_OSERR, "getsockopt(IP_FW_TABLE_LIST)"); 5827 for (a = 0; a < tbl->cnt; a++) { 5828 /* Heuristic to print it the right way */ 5829 /* values < 64k are printed as numbers */ 5830 unsigned int tval; 5831 tval = tbl->ent[a].value; 5832 if (tval > 0xffff) { 5833 char tbuf[128]; 5834 strncpy(tbuf, inet_ntoa(*(struct in_addr *) 5835 &tbl->ent[a].addr), 127); 5836 /* inet_ntoa expects host order */ 5837 tval = htonl(tval); 5838 printf("%s/%u %s\n", tbuf, tbl->ent[a].masklen, 5839 inet_ntoa(*(struct in_addr *)&tval)); 5840 } else { 5841 printf("%s/%u %u\n", 5842 inet_ntoa(*(struct in_addr *)&tbl->ent[a].addr), 5843 tbl->ent[a].masklen, tbl->ent[a].value); 5844 } 5845 } 5846 } else 5847 errx(EX_USAGE, "invalid table command %s", *av); 5848} 5849 5850static void 5851show_nat(int ac, char **av) { 5852 struct cfg_nat *n; 5853 struct cfg_redir *e; 5854 int cmd, i, nbytes, do_cfg, do_rule, frule, lrule, nalloc, size; 5855 int nat_cnt, r; 5856 uint8_t *data, *p; 5857 char **lav, *endptr; 5858 5859 do_rule = 0; 5860 nalloc = 1024; 5861 size = 0; 5862 data = NULL; 5863 ac--; av++; 5864 5865 /* Parse parameters. */ 5866 for (cmd = IP_FW_NAT_GET_LOG, do_cfg = 0; ac != 0; ac--, av++) { 5867 if (!strncmp(av[0], "config", strlen(av[0]))) { 5868 cmd = IP_FW_NAT_GET_CONFIG, do_cfg = 1; 5869 continue; 5870 } 5871 /* Convert command line rule #. */ 5872 frule = lrule = strtoul(av[0], &endptr, 10); 5873 if (*endptr == '-') 5874 lrule = strtoul(endptr+1, &endptr, 10); 5875 if (lrule == 0) 5876 err(EX_USAGE, "invalid rule number: %s", av[0]); 5877 do_rule = 1; 5878 } 5879 5880 nbytes = nalloc; 5881 while (nbytes >= nalloc) { 5882 nalloc = nalloc * 2; 5883 nbytes = nalloc; 5884 if ((data = realloc(data, nbytes)) == NULL) 5885 err(EX_OSERR, "realloc"); 5886 if (do_cmd(cmd, data, (uintptr_t)&nbytes) < 0) 5887 err(EX_OSERR, "getsockopt(IP_FW_GET_%s)", 5888 (cmd == IP_FW_NAT_GET_LOG) ? "LOG" : "CONFIG"); 5889 } 5890 if (nbytes == 0) 5891 exit(0); 5892 if (do_cfg) { 5893 nat_cnt = *((int *)data); 5894 for (i = sizeof(nat_cnt); nat_cnt; nat_cnt--) { 5895 n = (struct cfg_nat *)&data[i]; 5896 if (do_rule) { 5897 if (!(frule <= n->id && lrule >= n->id)) 5898 continue; 5899 } 5900 print_nat_config(&data[i]); 5901 i += sizeof(struct cfg_nat); 5902 e = (struct cfg_redir *)&data[i]; 5903 if (e->mode == REDIR_ADDR || e->mode == REDIR_PORT || 5904 e->mode == REDIR_PROTO) 5905 i += sizeof(struct cfg_redir) + e->spool_cnt * 5906 sizeof(struct cfg_spool); 5907 } 5908 } else { 5909 for (i = 0; 1; i += LIBALIAS_BUF_SIZE + sizeof(int)) { 5910 p = &data[i]; 5911 if (p == data + nbytes) 5912 break; 5913 bcopy(p, &r, sizeof(int)); 5914 if (do_rule) { 5915 if (!(frule <= r && lrule >= r)) 5916 continue; 5917 } 5918 printf("nat %u: %s\n", r, p+sizeof(int)); 5919 } 5920 } 5921} 5922 5923/* 5924 * Called with the arguments (excluding program name). 5925 * Returns 0 if successful, 1 if empty command, errx() in case of errors. 5926 */ 5927static int 5928ipfw_main(int oldac, char **oldav) 5929{ 5930 int ch, ac, save_ac; 5931 char **av, **save_av; 5932 int do_acct = 0; /* Show packet/byte count */ 5933 5934#define WHITESP " \t\f\v\n\r" 5935 if (oldac == 0) 5936 return 1; 5937 else if (oldac == 1) { 5938 /* 5939 * If we are called with a single string, try to split it into 5940 * arguments for subsequent parsing. 5941 * But first, remove spaces after a ',', by copying the string 5942 * in-place. 5943 */ 5944 char *arg = oldav[0]; /* The string... */ 5945 int l = strlen(arg); 5946 int copy = 0; /* 1 if we need to copy, 0 otherwise */ 5947 int i, j; 5948 for (i = j = 0; i < l; i++) { 5949 if (arg[i] == '#') /* comment marker */ 5950 break; 5951 if (copy) { 5952 arg[j++] = arg[i]; 5953 copy = !index("," WHITESP, arg[i]); 5954 } else { 5955 copy = !index(WHITESP, arg[i]); 5956 if (copy) 5957 arg[j++] = arg[i]; 5958 } 5959 } 5960 if (!copy && j > 0) /* last char was a 'blank', remove it */ 5961 j--; 5962 l = j; /* the new argument length */ 5963 arg[j++] = '\0'; 5964 if (l == 0) /* empty string! */ 5965 return 1; 5966 5967 /* 5968 * First, count number of arguments. Because of the previous 5969 * processing, this is just the number of blanks plus 1. 5970 */ 5971 for (i = 0, ac = 1; i < l; i++) 5972 if (index(WHITESP, arg[i]) != NULL) 5973 ac++; 5974 5975 av = calloc(ac, sizeof(char *)); 5976 5977 /* 5978 * Second, copy arguments from cmd[] to av[]. For each one, 5979 * j is the initial character, i is the one past the end. 5980 */ 5981 for (ac = 0, i = j = 0; i < l; i++) 5982 if (index(WHITESP, arg[i]) != NULL || i == l-1) { 5983 if (i == l-1) 5984 i++; 5985 av[ac] = calloc(i-j+1, 1); 5986 bcopy(arg+j, av[ac], i-j); 5987 ac++; 5988 j = i + 1; 5989 } 5990 } else { 5991 /* 5992 * If an argument ends with ',' join with the next one. 5993 */ 5994 int first, i, l; 5995 5996 av = calloc(oldac, sizeof(char *)); 5997 for (first = i = ac = 0, l = 0; i < oldac; i++) { 5998 char *arg = oldav[i]; 5999 int k = strlen(arg); 6000 6001 l += k; 6002 if (arg[k-1] != ',' || i == oldac-1) { 6003 /* Time to copy. */ 6004 av[ac] = calloc(l+1, 1); 6005 for (l=0; first <= i; first++) { 6006 strcat(av[ac]+l, oldav[first]); 6007 l += strlen(oldav[first]); 6008 } 6009 ac++; 6010 l = 0; 6011 first = i+1; 6012 } 6013 } 6014 } 6015 6016 /* Set the force flag for non-interactive processes */ 6017 if (!do_force) 6018 do_force = !isatty(STDIN_FILENO); 6019 6020 /* Save arguments for final freeing of memory. */ 6021 save_ac = ac; 6022 save_av = av; 6023 6024 optind = optreset = 0; 6025 while ((ch = getopt(ac, av, "abcdefhnNqs:STtv")) != -1) 6026 switch (ch) { 6027 case 'a': 6028 do_acct = 1; 6029 break; 6030 6031 case 'b': 6032 comment_only = 1; 6033 do_compact = 1; 6034 break; 6035 6036 case 'c': 6037 do_compact = 1; 6038 break; 6039 6040 case 'd': 6041 do_dynamic = 1; 6042 break; 6043 6044 case 'e': 6045 do_expired = 1; 6046 break; 6047 6048 case 'f': 6049 do_force = 1; 6050 break; 6051 6052 case 'h': /* help */ 6053 free_args(save_ac, save_av); 6054 help(); 6055 break; /* NOTREACHED */ 6056 6057 case 'n': 6058 test_only = 1; 6059 break; 6060 6061 case 'N': 6062 do_resolv = 1; 6063 break; 6064 6065 case 'q': 6066 do_quiet = 1; 6067 break; 6068 6069 case 's': /* sort */ 6070 do_sort = atoi(optarg); 6071 break; 6072 6073 case 'S': 6074 show_sets = 1; 6075 break; 6076 6077 case 't': 6078 do_time = 1; 6079 break; 6080 6081 case 'T': 6082 do_time = 2; /* numeric timestamp */ 6083 break; 6084 6085 case 'v': /* verbose */ 6086 verbose = 1; 6087 break; 6088 6089 default: 6090 free_args(save_ac, save_av); 6091 return 1; 6092 } 6093 6094 ac -= optind; 6095 av += optind; 6096 NEED1("bad arguments, for usage summary ``ipfw''"); 6097 6098 /* 6099 * An undocumented behaviour of ipfw1 was to allow rule numbers first, 6100 * e.g. "100 add allow ..." instead of "add 100 allow ...". 6101 * In case, swap first and second argument to get the normal form. 6102 */ 6103 if (ac > 1 && isdigit(*av[0])) { 6104 char *p = av[0]; 6105 6106 av[0] = av[1]; 6107 av[1] = p; 6108 } 6109 6110 /* 6111 * Optional: pipe, queue or nat. 6112 */ 6113 do_nat = 0; 6114 do_pipe = 0; 6115 if (!strncmp(*av, "nat", strlen(*av))) 6116 do_nat = 1; 6117 else if (!strncmp(*av, "pipe", strlen(*av))) 6118 do_pipe = 1; 6119 else if (_substrcmp(*av, "queue") == 0) 6120 do_pipe = 2; 6121 if (do_pipe || do_nat) { 6122 ac--; 6123 av++; 6124 } 6125 NEED1("missing command"); 6126 6127 /* 6128 * For pipes, queues and nats we normally say 'nat|pipe NN config' 6129 * but the code is easier to parse as 'nat|pipe config NN' 6130 * so we swap the two arguments. 6131 */ 6132 if ((do_pipe || do_nat) && ac > 1 && isdigit(*av[0])) { 6133 char *p = av[0]; 6134 6135 av[0] = av[1]; 6136 av[1] = p; 6137 } 6138 6139 if (_substrcmp(*av, "add") == 0) 6140 add(ac, av); 6141 else if (do_nat && _substrcmp(*av, "show") == 0) 6142 show_nat(ac, av); 6143 else if (do_pipe && _substrcmp(*av, "config") == 0) 6144 config_pipe(ac, av); 6145 else if (do_nat && _substrcmp(*av, "config") == 0) 6146 config_nat(ac, av); 6147 else if (_substrcmp(*av, "delete") == 0) 6148 delete(ac, av); 6149 else if (_substrcmp(*av, "flush") == 0) 6150 flush(do_force); 6151 else if (_substrcmp(*av, "zero") == 0) 6152 zero(ac, av, IP_FW_ZERO); 6153 else if (_substrcmp(*av, "resetlog") == 0) 6154 zero(ac, av, IP_FW_RESETLOG); 6155 else if (_substrcmp(*av, "print") == 0 || 6156 _substrcmp(*av, "list") == 0) 6157 list(ac, av, do_acct); 6158 else if (_substrcmp(*av, "set") == 0) 6159 sets_handler(ac, av); 6160 else if (_substrcmp(*av, "table") == 0) 6161 table_handler(ac, av); 6162 else if (_substrcmp(*av, "enable") == 0) 6163 sysctl_handler(ac, av, 1); 6164 else if (_substrcmp(*av, "disable") == 0) 6165 sysctl_handler(ac, av, 0); 6166 else if (_substrcmp(*av, "show") == 0) 6167 list(ac, av, 1 /* show counters */); 6168 else 6169 errx(EX_USAGE, "bad command `%s'", *av); 6170 6171 /* Free memory allocated in the argument parsing. */ 6172 free_args(save_ac, save_av); 6173 return 0; 6174} 6175 6176 6177static void 6178ipfw_readfile(int ac, char *av[]) 6179{ 6180#define MAX_ARGS 32 6181 char buf[BUFSIZ]; 6182 char *cmd = NULL, *filename = av[ac-1]; 6183 int c, lineno=0; 6184 FILE *f = NULL; 6185 pid_t preproc = 0; 6186 6187 filename = av[ac-1]; 6188 6189 while ((c = getopt(ac, av, "cfNnp:qS")) != -1) { 6190 switch(c) { 6191 case 'c': 6192 do_compact = 1; 6193 break; 6194 6195 case 'f': 6196 do_force = 1; 6197 break; 6198 6199 case 'N': 6200 do_resolv = 1; 6201 break; 6202 6203 case 'n': 6204 test_only = 1; 6205 break; 6206 6207 case 'p': 6208 cmd = optarg; 6209 /* 6210 * Skip previous args and delete last one, so we 6211 * pass all but the last argument to the preprocessor 6212 * via av[optind-1] 6213 */ 6214 av += optind - 1; 6215 ac -= optind - 1; 6216 if (ac < 2) 6217 errx(EX_USAGE, "no filename argument"); 6218 av[ac-1] = NULL; 6219 fprintf(stderr, "command is %s\n", av[0]); 6220 break; 6221 6222 case 'q': 6223 do_quiet = 1; 6224 break; 6225 6226 case 'S': 6227 show_sets = 1; 6228 break; 6229 6230 default: 6231 errx(EX_USAGE, "bad arguments, for usage" 6232 " summary ``ipfw''"); 6233 } 6234 6235 if (cmd != NULL) 6236 break; 6237 } 6238 6239 if (cmd == NULL && ac != optind + 1) { 6240 fprintf(stderr, "ac %d, optind %d\n", ac, optind); 6241 errx(EX_USAGE, "extraneous filename arguments"); 6242 } 6243 6244 if ((f = fopen(filename, "r")) == NULL) 6245 err(EX_UNAVAILABLE, "fopen: %s", filename); 6246 6247 if (cmd != NULL) { /* pipe through preprocessor */ 6248 int pipedes[2]; 6249 6250 if (pipe(pipedes) == -1) 6251 err(EX_OSERR, "cannot create pipe"); 6252 6253 preproc = fork(); 6254 if (preproc == -1) 6255 err(EX_OSERR, "cannot fork"); 6256 6257 if (preproc == 0) { 6258 /* 6259 * Child, will run the preprocessor with the 6260 * file on stdin and the pipe on stdout. 6261 */ 6262 if (dup2(fileno(f), 0) == -1 6263 || dup2(pipedes[1], 1) == -1) 6264 err(EX_OSERR, "dup2()"); 6265 fclose(f); 6266 close(pipedes[1]); 6267 close(pipedes[0]); 6268 execvp(cmd, av); 6269 err(EX_OSERR, "execvp(%s) failed", cmd); 6270 } else { /* parent, will reopen f as the pipe */ 6271 fclose(f); 6272 close(pipedes[1]); 6273 if ((f = fdopen(pipedes[0], "r")) == NULL) { 6274 int savederrno = errno; 6275 6276 (void)kill(preproc, SIGTERM); 6277 errno = savederrno; 6278 err(EX_OSERR, "fdopen()"); 6279 } 6280 } 6281 } 6282 6283 while (fgets(buf, BUFSIZ, f)) { /* read commands */ 6284 char linename[10]; 6285 char *args[1]; 6286 6287 lineno++; 6288 sprintf(linename, "Line %d", lineno); 6289 setprogname(linename); /* XXX */ 6290 args[0] = buf; 6291 ipfw_main(1, args); 6292 } 6293 fclose(f); 6294 if (cmd != NULL) { 6295 int status; 6296 6297 if (waitpid(preproc, &status, 0) == -1) 6298 errx(EX_OSERR, "waitpid()"); 6299 if (WIFEXITED(status) && WEXITSTATUS(status) != EX_OK) 6300 errx(EX_UNAVAILABLE, 6301 "preprocessor exited with status %d", 6302 WEXITSTATUS(status)); 6303 else if (WIFSIGNALED(status)) 6304 errx(EX_UNAVAILABLE, 6305 "preprocessor exited with signal %d", 6306 WTERMSIG(status)); 6307 } 6308} 6309 6310int 6311main(int ac, char *av[]) 6312{ 6313 /* 6314 * If the last argument is an absolute pathname, interpret it 6315 * as a file to be preprocessed. 6316 */ 6317 6318 if (ac > 1 && av[ac - 1][0] == '/' && access(av[ac - 1], R_OK) == 0) 6319 ipfw_readfile(ac, av); 6320 else { 6321 if (ipfw_main(ac-1, av+1)) 6322 show_usage(); 6323 } 6324 return EX_OK; 6325} 6326