ipfw2.c revision 342571
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: stable/11/sbin/ipfw/ipfw2.c 342571 2018-12-28 10:10:16Z ae $ 21 */ 22 23#include <sys/types.h> 24#include <sys/param.h> 25#include <sys/socket.h> 26#include <sys/sockio.h> 27#include <sys/sysctl.h> 28 29#include "ipfw2.h" 30 31#include <ctype.h> 32#include <err.h> 33#include <errno.h> 34#include <grp.h> 35#include <jail.h> 36#include <netdb.h> 37#include <pwd.h> 38#include <stdio.h> 39#include <stdarg.h> 40#include <stdint.h> 41#include <stdlib.h> 42#include <string.h> 43#include <sysexits.h> 44#include <time.h> /* ctime */ 45#include <timeconv.h> /* _long_to_time */ 46#include <unistd.h> 47#include <fcntl.h> 48#include <stddef.h> /* offsetof */ 49 50#include <net/ethernet.h> 51#include <net/if.h> /* only IFNAMSIZ */ 52#include <netinet/in.h> 53#include <netinet/in_systm.h> /* only n_short, n_long */ 54#include <netinet/ip.h> 55#include <netinet/ip_icmp.h> 56#include <netinet/ip_fw.h> 57#include <netinet/tcp.h> 58#include <arpa/inet.h> 59 60struct cmdline_opts co; /* global options */ 61 62struct format_opts { 63 int bcwidth; 64 int pcwidth; 65 int show_counters; 66 int show_time; /* show timestamp */ 67 uint32_t set_mask; /* enabled sets mask */ 68 uint32_t flags; /* request flags */ 69 uint32_t first; /* first rule to request */ 70 uint32_t last; /* last rule to request */ 71 uint32_t dcnt; /* number of dynamic states */ 72 ipfw_obj_ctlv *tstate; /* table state data */ 73}; 74 75int resvd_set_number = RESVD_SET; 76 77int ipfw_socket = -1; 78 79#define CHECK_LENGTH(v, len) do { \ 80 if ((v) < (len)) \ 81 errx(EX_DATAERR, "Rule too long"); \ 82 } while (0) 83/* 84 * Check if we have enough space in cmd buffer. Note that since 85 * first 8? u32 words are reserved by reserved header, full cmd 86 * buffer can't be used, so we need to protect from buffer overrun 87 * only. At the beginning, cblen is less than actual buffer size by 88 * size of ipfw_insn_u32 instruction + 1 u32 work. This eliminates need 89 * for checking small instructions fitting in given range. 90 * We also (ab)use the fact that ipfw_insn is always the first field 91 * for any custom instruction. 92 */ 93#define CHECK_CMDLEN CHECK_LENGTH(cblen, F_LEN((ipfw_insn *)cmd)) 94 95#define GET_UINT_ARG(arg, min, max, tok, s_x) do { \ 96 if (!av[0]) \ 97 errx(EX_USAGE, "%s: missing argument", match_value(s_x, tok)); \ 98 if (_substrcmp(*av, "tablearg") == 0) { \ 99 arg = IP_FW_TARG; \ 100 break; \ 101 } \ 102 \ 103 { \ 104 long _xval; \ 105 char *end; \ 106 \ 107 _xval = strtol(*av, &end, 10); \ 108 \ 109 if (!isdigit(**av) || *end != '\0' || (_xval == 0 && errno == EINVAL)) \ 110 errx(EX_DATAERR, "%s: invalid argument: %s", \ 111 match_value(s_x, tok), *av); \ 112 \ 113 if (errno == ERANGE || _xval < min || _xval > max) \ 114 errx(EX_DATAERR, "%s: argument is out of range (%u..%u): %s", \ 115 match_value(s_x, tok), min, max, *av); \ 116 \ 117 if (_xval == IP_FW_TARG) \ 118 errx(EX_DATAERR, "%s: illegal argument value: %s", \ 119 match_value(s_x, tok), *av); \ 120 arg = _xval; \ 121 } \ 122} while (0) 123 124static struct _s_x f_tcpflags[] = { 125 { "syn", TH_SYN }, 126 { "fin", TH_FIN }, 127 { "ack", TH_ACK }, 128 { "psh", TH_PUSH }, 129 { "rst", TH_RST }, 130 { "urg", TH_URG }, 131 { "tcp flag", 0 }, 132 { NULL, 0 } 133}; 134 135static struct _s_x f_tcpopts[] = { 136 { "mss", IP_FW_TCPOPT_MSS }, 137 { "maxseg", IP_FW_TCPOPT_MSS }, 138 { "window", IP_FW_TCPOPT_WINDOW }, 139 { "sack", IP_FW_TCPOPT_SACK }, 140 { "ts", IP_FW_TCPOPT_TS }, 141 { "timestamp", IP_FW_TCPOPT_TS }, 142 { "cc", IP_FW_TCPOPT_CC }, 143 { "tcp option", 0 }, 144 { NULL, 0 } 145}; 146 147/* 148 * IP options span the range 0 to 255 so we need to remap them 149 * (though in fact only the low 5 bits are significant). 150 */ 151static struct _s_x f_ipopts[] = { 152 { "ssrr", IP_FW_IPOPT_SSRR}, 153 { "lsrr", IP_FW_IPOPT_LSRR}, 154 { "rr", IP_FW_IPOPT_RR}, 155 { "ts", IP_FW_IPOPT_TS}, 156 { "ip option", 0 }, 157 { NULL, 0 } 158}; 159 160static struct _s_x f_iptos[] = { 161 { "lowdelay", IPTOS_LOWDELAY}, 162 { "throughput", IPTOS_THROUGHPUT}, 163 { "reliability", IPTOS_RELIABILITY}, 164 { "mincost", IPTOS_MINCOST}, 165 { "congestion", IPTOS_ECN_CE}, 166 { "ecntransport", IPTOS_ECN_ECT0}, 167 { "ip tos option", 0}, 168 { NULL, 0 } 169}; 170 171struct _s_x f_ipdscp[] = { 172 { "af11", IPTOS_DSCP_AF11 >> 2 }, /* 001010 */ 173 { "af12", IPTOS_DSCP_AF12 >> 2 }, /* 001100 */ 174 { "af13", IPTOS_DSCP_AF13 >> 2 }, /* 001110 */ 175 { "af21", IPTOS_DSCP_AF21 >> 2 }, /* 010010 */ 176 { "af22", IPTOS_DSCP_AF22 >> 2 }, /* 010100 */ 177 { "af23", IPTOS_DSCP_AF23 >> 2 }, /* 010110 */ 178 { "af31", IPTOS_DSCP_AF31 >> 2 }, /* 011010 */ 179 { "af32", IPTOS_DSCP_AF32 >> 2 }, /* 011100 */ 180 { "af33", IPTOS_DSCP_AF33 >> 2 }, /* 011110 */ 181 { "af41", IPTOS_DSCP_AF41 >> 2 }, /* 100010 */ 182 { "af42", IPTOS_DSCP_AF42 >> 2 }, /* 100100 */ 183 { "af43", IPTOS_DSCP_AF43 >> 2 }, /* 100110 */ 184 { "be", IPTOS_DSCP_CS0 >> 2 }, /* 000000 */ 185 { "ef", IPTOS_DSCP_EF >> 2 }, /* 101110 */ 186 { "cs0", IPTOS_DSCP_CS0 >> 2 }, /* 000000 */ 187 { "cs1", IPTOS_DSCP_CS1 >> 2 }, /* 001000 */ 188 { "cs2", IPTOS_DSCP_CS2 >> 2 }, /* 010000 */ 189 { "cs3", IPTOS_DSCP_CS3 >> 2 }, /* 011000 */ 190 { "cs4", IPTOS_DSCP_CS4 >> 2 }, /* 100000 */ 191 { "cs5", IPTOS_DSCP_CS5 >> 2 }, /* 101000 */ 192 { "cs6", IPTOS_DSCP_CS6 >> 2 }, /* 110000 */ 193 { "cs7", IPTOS_DSCP_CS7 >> 2 }, /* 100000 */ 194 { NULL, 0 } 195}; 196 197static struct _s_x limit_masks[] = { 198 {"all", DYN_SRC_ADDR|DYN_SRC_PORT|DYN_DST_ADDR|DYN_DST_PORT}, 199 {"src-addr", DYN_SRC_ADDR}, 200 {"src-port", DYN_SRC_PORT}, 201 {"dst-addr", DYN_DST_ADDR}, 202 {"dst-port", DYN_DST_PORT}, 203 {NULL, 0} 204}; 205 206/* 207 * we use IPPROTO_ETHERTYPE as a fake protocol id to call the print routines 208 * This is only used in this code. 209 */ 210#define IPPROTO_ETHERTYPE 0x1000 211static struct _s_x ether_types[] = { 212 /* 213 * Note, we cannot use "-:&/" in the names because they are field 214 * separators in the type specifications. Also, we use s = NULL as 215 * end-delimiter, because a type of 0 can be legal. 216 */ 217 { "ip", 0x0800 }, 218 { "ipv4", 0x0800 }, 219 { "ipv6", 0x86dd }, 220 { "arp", 0x0806 }, 221 { "rarp", 0x8035 }, 222 { "vlan", 0x8100 }, 223 { "loop", 0x9000 }, 224 { "trail", 0x1000 }, 225 { "at", 0x809b }, 226 { "atalk", 0x809b }, 227 { "aarp", 0x80f3 }, 228 { "pppoe_disc", 0x8863 }, 229 { "pppoe_sess", 0x8864 }, 230 { "ipx_8022", 0x00E0 }, 231 { "ipx_8023", 0x0000 }, 232 { "ipx_ii", 0x8137 }, 233 { "ipx_snap", 0x8137 }, 234 { "ipx", 0x8137 }, 235 { "ns", 0x0600 }, 236 { NULL, 0 } 237}; 238 239static struct _s_x rule_eactions[] = { 240 { "nat64lsn", TOK_NAT64LSN }, 241 { "nat64stl", TOK_NAT64STL }, 242 { "nptv6", TOK_NPTV6 }, 243 { "tcp-setmss", TOK_TCPSETMSS }, 244 { NULL, 0 } /* terminator */ 245}; 246 247static struct _s_x rule_actions[] = { 248 { "abort6", TOK_ABORT6 }, 249 { "abort", TOK_ABORT }, 250 { "accept", TOK_ACCEPT }, 251 { "pass", TOK_ACCEPT }, 252 { "allow", TOK_ACCEPT }, 253 { "permit", TOK_ACCEPT }, 254 { "count", TOK_COUNT }, 255 { "pipe", TOK_PIPE }, 256 { "queue", TOK_QUEUE }, 257 { "divert", TOK_DIVERT }, 258 { "tee", TOK_TEE }, 259 { "netgraph", TOK_NETGRAPH }, 260 { "ngtee", TOK_NGTEE }, 261 { "fwd", TOK_FORWARD }, 262 { "forward", TOK_FORWARD }, 263 { "skipto", TOK_SKIPTO }, 264 { "deny", TOK_DENY }, 265 { "drop", TOK_DENY }, 266 { "reject", TOK_REJECT }, 267 { "reset6", TOK_RESET6 }, 268 { "reset", TOK_RESET }, 269 { "unreach6", TOK_UNREACH6 }, 270 { "unreach", TOK_UNREACH }, 271 { "check-state", TOK_CHECKSTATE }, 272 { "//", TOK_COMMENT }, 273 { "nat", TOK_NAT }, 274 { "reass", TOK_REASS }, 275 { "setfib", TOK_SETFIB }, 276 { "setdscp", TOK_SETDSCP }, 277 { "call", TOK_CALL }, 278 { "return", TOK_RETURN }, 279 { "eaction", TOK_EACTION }, 280 { "tcp-setmss", TOK_TCPSETMSS }, 281 { NULL, 0 } /* terminator */ 282}; 283 284static struct _s_x rule_action_params[] = { 285 { "altq", TOK_ALTQ }, 286 { "log", TOK_LOG }, 287 { "tag", TOK_TAG }, 288 { "untag", TOK_UNTAG }, 289 { NULL, 0 } /* terminator */ 290}; 291 292/* 293 * The 'lookup' instruction accepts one of the following arguments. 294 * -1 is a terminator for the list. 295 * Arguments are passed as v[1] in O_DST_LOOKUP options. 296 */ 297static int lookup_key[] = { 298 TOK_DSTIP, TOK_SRCIP, TOK_DSTPORT, TOK_SRCPORT, 299 TOK_UID, TOK_JAIL, TOK_DSCP, -1 }; 300 301static struct _s_x rule_options[] = { 302 { "tagged", TOK_TAGGED }, 303 { "uid", TOK_UID }, 304 { "gid", TOK_GID }, 305 { "jail", TOK_JAIL }, 306 { "in", TOK_IN }, 307 { "limit", TOK_LIMIT }, 308 { "set-limit", TOK_SETLIMIT }, 309 { "keep-state", TOK_KEEPSTATE }, 310 { "record-state", TOK_RECORDSTATE }, 311 { "bridged", TOK_LAYER2 }, 312 { "layer2", TOK_LAYER2 }, 313 { "out", TOK_OUT }, 314 { "diverted", TOK_DIVERTED }, 315 { "diverted-loopback", TOK_DIVERTEDLOOPBACK }, 316 { "diverted-output", TOK_DIVERTEDOUTPUT }, 317 { "xmit", TOK_XMIT }, 318 { "recv", TOK_RECV }, 319 { "via", TOK_VIA }, 320 { "fragment", TOK_FRAG }, 321 { "frag", TOK_FRAG }, 322 { "fib", TOK_FIB }, 323 { "ipoptions", TOK_IPOPTS }, 324 { "ipopts", TOK_IPOPTS }, 325 { "iplen", TOK_IPLEN }, 326 { "ipid", TOK_IPID }, 327 { "ipprecedence", TOK_IPPRECEDENCE }, 328 { "dscp", TOK_DSCP }, 329 { "iptos", TOK_IPTOS }, 330 { "ipttl", TOK_IPTTL }, 331 { "ipversion", TOK_IPVER }, 332 { "ipver", TOK_IPVER }, 333 { "estab", TOK_ESTAB }, 334 { "established", TOK_ESTAB }, 335 { "setup", TOK_SETUP }, 336 { "sockarg", TOK_SOCKARG }, 337 { "tcpdatalen", TOK_TCPDATALEN }, 338 { "tcpflags", TOK_TCPFLAGS }, 339 { "tcpflgs", TOK_TCPFLAGS }, 340 { "tcpoptions", TOK_TCPOPTS }, 341 { "tcpopts", TOK_TCPOPTS }, 342 { "tcpseq", TOK_TCPSEQ }, 343 { "tcpack", TOK_TCPACK }, 344 { "tcpwin", TOK_TCPWIN }, 345 { "icmptype", TOK_ICMPTYPES }, 346 { "icmptypes", TOK_ICMPTYPES }, 347 { "dst-ip", TOK_DSTIP }, 348 { "src-ip", TOK_SRCIP }, 349 { "dst-port", TOK_DSTPORT }, 350 { "src-port", TOK_SRCPORT }, 351 { "proto", TOK_PROTO }, 352 { "MAC", TOK_MAC }, 353 { "mac", TOK_MAC }, 354 { "mac-type", TOK_MACTYPE }, 355 { "verrevpath", TOK_VERREVPATH }, 356 { "versrcreach", TOK_VERSRCREACH }, 357 { "antispoof", TOK_ANTISPOOF }, 358 { "ipsec", TOK_IPSEC }, 359 { "icmp6type", TOK_ICMP6TYPES }, 360 { "icmp6types", TOK_ICMP6TYPES }, 361 { "ext6hdr", TOK_EXT6HDR}, 362 { "flow-id", TOK_FLOWID}, 363 { "ipv6", TOK_IPV6}, 364 { "ip6", TOK_IPV6}, 365 { "ipv4", TOK_IPV4}, 366 { "ip4", TOK_IPV4}, 367 { "dst-ipv6", TOK_DSTIP6}, 368 { "dst-ip6", TOK_DSTIP6}, 369 { "src-ipv6", TOK_SRCIP6}, 370 { "src-ip6", TOK_SRCIP6}, 371 { "lookup", TOK_LOOKUP}, 372 { "flow", TOK_FLOW}, 373 { "defer-action", TOK_SKIPACTION }, 374 { "defer-immediate-action", TOK_SKIPACTION }, 375 { "//", TOK_COMMENT }, 376 377 { "not", TOK_NOT }, /* pseudo option */ 378 { "!", /* escape ? */ TOK_NOT }, /* pseudo option */ 379 { "or", TOK_OR }, /* pseudo option */ 380 { "|", /* escape */ TOK_OR }, /* pseudo option */ 381 { "{", TOK_STARTBRACE }, /* pseudo option */ 382 { "(", TOK_STARTBRACE }, /* pseudo option */ 383 { "}", TOK_ENDBRACE }, /* pseudo option */ 384 { ")", TOK_ENDBRACE }, /* pseudo option */ 385 { NULL, 0 } /* terminator */ 386}; 387 388void bprint_uint_arg(struct buf_pr *bp, const char *str, uint32_t arg); 389static int ipfw_get_config(struct cmdline_opts *co, struct format_opts *fo, 390 ipfw_cfg_lheader **pcfg, size_t *psize); 391static int ipfw_show_config(struct cmdline_opts *co, struct format_opts *fo, 392 ipfw_cfg_lheader *cfg, size_t sz, int ac, char **av); 393static void ipfw_list_tifaces(void); 394 395struct tidx; 396static uint16_t pack_object(struct tidx *tstate, char *name, int otype); 397static uint16_t pack_table(struct tidx *tstate, char *name); 398 399static char *table_search_ctlv(ipfw_obj_ctlv *ctlv, uint16_t idx); 400static void object_sort_ctlv(ipfw_obj_ctlv *ctlv); 401static char *object_search_ctlv(ipfw_obj_ctlv *ctlv, uint16_t idx, 402 uint16_t type); 403 404/* 405 * Simple string buffer API. 406 * Used to simplify buffer passing between function and for 407 * transparent overrun handling. 408 */ 409 410/* 411 * Allocates new buffer of given size @sz. 412 * 413 * Returns 0 on success. 414 */ 415int 416bp_alloc(struct buf_pr *b, size_t size) 417{ 418 memset(b, 0, sizeof(struct buf_pr)); 419 420 if ((b->buf = calloc(1, size)) == NULL) 421 return (ENOMEM); 422 423 b->ptr = b->buf; 424 b->size = size; 425 b->avail = b->size; 426 427 return (0); 428} 429 430void 431bp_free(struct buf_pr *b) 432{ 433 434 free(b->buf); 435} 436 437/* 438 * Flushes buffer so new writer start from beginning. 439 */ 440void 441bp_flush(struct buf_pr *b) 442{ 443 444 b->ptr = b->buf; 445 b->avail = b->size; 446 b->buf[0] = '\0'; 447} 448 449/* 450 * Print message specified by @format and args. 451 * Automatically manage buffer space and transparently handle 452 * buffer overruns. 453 * 454 * Returns number of bytes that should have been printed. 455 */ 456int 457bprintf(struct buf_pr *b, char *format, ...) 458{ 459 va_list args; 460 int i; 461 462 va_start(args, format); 463 464 i = vsnprintf(b->ptr, b->avail, format, args); 465 va_end(args); 466 467 if (i > b->avail || i < 0) { 468 /* Overflow or print error */ 469 b->avail = 0; 470 } else { 471 b->ptr += i; 472 b->avail -= i; 473 } 474 475 b->needed += i; 476 477 return (i); 478} 479 480/* 481 * Special values printer for tablearg-aware opcodes. 482 */ 483void 484bprint_uint_arg(struct buf_pr *bp, const char *str, uint32_t arg) 485{ 486 487 if (str != NULL) 488 bprintf(bp, "%s", str); 489 if (arg == IP_FW_TARG) 490 bprintf(bp, "tablearg"); 491 else 492 bprintf(bp, "%u", arg); 493} 494 495/* 496 * Helper routine to print a possibly unaligned uint64_t on 497 * various platform. If width > 0, print the value with 498 * the desired width, followed by a space; 499 * otherwise, return the required width. 500 */ 501int 502pr_u64(struct buf_pr *b, uint64_t *pd, int width) 503{ 504#ifdef TCC 505#define U64_FMT "I64" 506#else 507#define U64_FMT "llu" 508#endif 509 uint64_t u; 510 unsigned long long d; 511 512 bcopy (pd, &u, sizeof(u)); 513 d = u; 514 return (width > 0) ? 515 bprintf(b, "%*" U64_FMT " ", width, d) : 516 snprintf(NULL, 0, "%" U64_FMT, d) ; 517#undef U64_FMT 518} 519 520 521void * 522safe_calloc(size_t number, size_t size) 523{ 524 void *ret = calloc(number, size); 525 526 if (ret == NULL) 527 err(EX_OSERR, "calloc"); 528 return ret; 529} 530 531void * 532safe_realloc(void *ptr, size_t size) 533{ 534 void *ret = realloc(ptr, size); 535 536 if (ret == NULL) 537 err(EX_OSERR, "realloc"); 538 return ret; 539} 540 541/* 542 * Compare things like interface or table names. 543 */ 544int 545stringnum_cmp(const char *a, const char *b) 546{ 547 int la, lb; 548 549 la = strlen(a); 550 lb = strlen(b); 551 552 if (la > lb) 553 return (1); 554 else if (la < lb) 555 return (-01); 556 557 return (strcmp(a, b)); 558} 559 560 561/* 562 * conditionally runs the command. 563 * Selected options or negative -> getsockopt 564 */ 565int 566do_cmd(int optname, void *optval, uintptr_t optlen) 567{ 568 int i; 569 570 if (co.test_only) 571 return 0; 572 573 if (ipfw_socket == -1) 574 ipfw_socket = socket(AF_INET, SOCK_RAW, IPPROTO_RAW); 575 if (ipfw_socket < 0) 576 err(EX_UNAVAILABLE, "socket"); 577 578 if (optname == IP_FW_GET || optname == IP_DUMMYNET_GET || 579 optname == IP_FW_ADD || optname == IP_FW3 || 580 optname == IP_FW_NAT_GET_CONFIG || 581 optname < 0 || 582 optname == IP_FW_NAT_GET_LOG) { 583 if (optname < 0) 584 optname = -optname; 585 i = getsockopt(ipfw_socket, IPPROTO_IP, optname, optval, 586 (socklen_t *)optlen); 587 } else { 588 i = setsockopt(ipfw_socket, IPPROTO_IP, optname, optval, optlen); 589 } 590 return i; 591} 592 593/* 594 * do_set3 - pass ipfw control cmd to kernel 595 * @optname: option name 596 * @optval: pointer to option data 597 * @optlen: option length 598 * 599 * Assumes op3 header is already embedded. 600 * Calls setsockopt() with IP_FW3 as kernel-visible opcode. 601 * Returns 0 on success or errno otherwise. 602 */ 603int 604do_set3(int optname, ip_fw3_opheader *op3, size_t optlen) 605{ 606 607 if (co.test_only) 608 return (0); 609 610 if (ipfw_socket == -1) 611 ipfw_socket = socket(AF_INET, SOCK_RAW, IPPROTO_RAW); 612 if (ipfw_socket < 0) 613 err(EX_UNAVAILABLE, "socket"); 614 615 op3->opcode = optname; 616 617 return (setsockopt(ipfw_socket, IPPROTO_IP, IP_FW3, op3, optlen)); 618} 619 620/* 621 * do_get3 - pass ipfw control cmd to kernel 622 * @optname: option name 623 * @optval: pointer to option data 624 * @optlen: pointer to option length 625 * 626 * Assumes op3 header is already embedded. 627 * Calls getsockopt() with IP_FW3 as kernel-visible opcode. 628 * Returns 0 on success or errno otherwise. 629 */ 630int 631do_get3(int optname, ip_fw3_opheader *op3, size_t *optlen) 632{ 633 int error; 634 socklen_t len; 635 636 if (co.test_only) 637 return (0); 638 639 if (ipfw_socket == -1) 640 ipfw_socket = socket(AF_INET, SOCK_RAW, IPPROTO_RAW); 641 if (ipfw_socket < 0) 642 err(EX_UNAVAILABLE, "socket"); 643 644 op3->opcode = optname; 645 646 len = *optlen; 647 error = getsockopt(ipfw_socket, IPPROTO_IP, IP_FW3, op3, &len); 648 *optlen = len; 649 650 return (error); 651} 652 653/** 654 * match_token takes a table and a string, returns the value associated 655 * with the string (-1 in case of failure). 656 */ 657int 658match_token(struct _s_x *table, const char *string) 659{ 660 struct _s_x *pt; 661 uint i = strlen(string); 662 663 for (pt = table ; i && pt->s != NULL ; pt++) 664 if (strlen(pt->s) == i && !bcmp(string, pt->s, i)) 665 return pt->x; 666 return (-1); 667} 668 669/** 670 * match_token_relaxed takes a table and a string, returns the value associated 671 * with the string for the best match. 672 * 673 * Returns: 674 * value from @table for matched records 675 * -1 for non-matched records 676 * -2 if more than one records match @string. 677 */ 678int 679match_token_relaxed(struct _s_x *table, const char *string) 680{ 681 struct _s_x *pt, *m; 682 int i, c; 683 684 i = strlen(string); 685 c = 0; 686 687 for (pt = table ; i != 0 && pt->s != NULL ; pt++) { 688 if (strncmp(pt->s, string, i) != 0) 689 continue; 690 m = pt; 691 c++; 692 } 693 694 if (c == 1) 695 return (m->x); 696 697 return (c > 0 ? -2: -1); 698} 699 700int 701get_token(struct _s_x *table, const char *string, const char *errbase) 702{ 703 int tcmd; 704 705 if ((tcmd = match_token_relaxed(table, string)) < 0) 706 errx(EX_USAGE, "%s %s %s", 707 (tcmd == 0) ? "invalid" : "ambiguous", errbase, string); 708 709 return (tcmd); 710} 711 712/** 713 * match_value takes a table and a value, returns the string associated 714 * with the value (NULL in case of failure). 715 */ 716char const * 717match_value(struct _s_x *p, int value) 718{ 719 for (; p->s != NULL; p++) 720 if (p->x == value) 721 return p->s; 722 return NULL; 723} 724 725size_t 726concat_tokens(char *buf, size_t bufsize, struct _s_x *table, char *delimiter) 727{ 728 struct _s_x *pt; 729 int l; 730 size_t sz; 731 732 for (sz = 0, pt = table ; pt->s != NULL; pt++) { 733 l = snprintf(buf + sz, bufsize - sz, "%s%s", 734 (sz == 0) ? "" : delimiter, pt->s); 735 sz += l; 736 bufsize += l; 737 if (sz > bufsize) 738 return (bufsize); 739 } 740 741 return (sz); 742} 743 744/* 745 * helper function to process a set of flags and set bits in the 746 * appropriate masks. 747 */ 748int 749fill_flags(struct _s_x *flags, char *p, char **e, uint32_t *set, 750 uint32_t *clear) 751{ 752 char *q; /* points to the separator */ 753 int val; 754 uint32_t *which; /* mask we are working on */ 755 756 while (p && *p) { 757 if (*p == '!') { 758 p++; 759 which = clear; 760 } else 761 which = set; 762 q = strchr(p, ','); 763 if (q) 764 *q++ = '\0'; 765 val = match_token(flags, p); 766 if (val <= 0) { 767 if (e != NULL) 768 *e = p; 769 return (-1); 770 } 771 *which |= (uint32_t)val; 772 p = q; 773 } 774 return (0); 775} 776 777void 778print_flags_buffer(char *buf, size_t sz, struct _s_x *list, uint32_t set) 779{ 780 char const *comma = ""; 781 int i, l; 782 783 for (i = 0; list[i].x != 0; i++) { 784 if ((set & list[i].x) == 0) 785 continue; 786 787 set &= ~list[i].x; 788 l = snprintf(buf, sz, "%s%s", comma, list[i].s); 789 if (l >= sz) 790 return; 791 comma = ","; 792 buf += l; 793 sz -=l; 794 } 795} 796 797/* 798 * _substrcmp takes two strings and returns 1 if they do not match, 799 * and 0 if they match exactly or the first string is a sub-string 800 * of the second. A warning is printed to stderr in the case that the 801 * first string is a sub-string of the second. 802 * 803 * This function will be removed in the future through the usual 804 * deprecation process. 805 */ 806int 807_substrcmp(const char *str1, const char* str2) 808{ 809 810 if (strncmp(str1, str2, strlen(str1)) != 0) 811 return 1; 812 813 if (strlen(str1) != strlen(str2)) 814 warnx("DEPRECATED: '%s' matched '%s' as a sub-string", 815 str1, str2); 816 return 0; 817} 818 819/* 820 * _substrcmp2 takes three strings and returns 1 if the first two do not match, 821 * and 0 if they match exactly or the second string is a sub-string 822 * of the first. A warning is printed to stderr in the case that the 823 * first string does not match the third. 824 * 825 * This function exists to warn about the bizarre construction 826 * strncmp(str, "by", 2) which is used to allow people to use a shortcut 827 * for "bytes". The problem is that in addition to accepting "by", 828 * "byt", "byte", and "bytes", it also excepts "by_rabid_dogs" and any 829 * other string beginning with "by". 830 * 831 * This function will be removed in the future through the usual 832 * deprecation process. 833 */ 834int 835_substrcmp2(const char *str1, const char* str2, const char* str3) 836{ 837 838 if (strncmp(str1, str2, strlen(str2)) != 0) 839 return 1; 840 841 if (strcmp(str1, str3) != 0) 842 warnx("DEPRECATED: '%s' matched '%s'", 843 str1, str3); 844 return 0; 845} 846 847/* 848 * prints one port, symbolic or numeric 849 */ 850static void 851print_port(struct buf_pr *bp, int proto, uint16_t port) 852{ 853 854 if (proto == IPPROTO_ETHERTYPE) { 855 char const *s; 856 857 if (co.do_resolv && (s = match_value(ether_types, port)) ) 858 bprintf(bp, "%s", s); 859 else 860 bprintf(bp, "0x%04x", port); 861 } else { 862 struct servent *se = NULL; 863 if (co.do_resolv) { 864 struct protoent *pe = getprotobynumber(proto); 865 866 se = getservbyport(htons(port), pe ? pe->p_name : NULL); 867 } 868 if (se) 869 bprintf(bp, "%s", se->s_name); 870 else 871 bprintf(bp, "%d", port); 872 } 873} 874 875static struct _s_x _port_name[] = { 876 {"dst-port", O_IP_DSTPORT}, 877 {"src-port", O_IP_SRCPORT}, 878 {"ipid", O_IPID}, 879 {"iplen", O_IPLEN}, 880 {"ipttl", O_IPTTL}, 881 {"mac-type", O_MAC_TYPE}, 882 {"tcpdatalen", O_TCPDATALEN}, 883 {"tcpwin", O_TCPWIN}, 884 {"tagged", O_TAGGED}, 885 {NULL, 0} 886}; 887 888/* 889 * Print the values in a list 16-bit items of the types above. 890 * XXX todo: add support for mask. 891 */ 892static void 893print_newports(struct buf_pr *bp, ipfw_insn_u16 *cmd, int proto, int opcode) 894{ 895 uint16_t *p = cmd->ports; 896 int i; 897 char const *sep; 898 899 if (opcode != 0) { 900 sep = match_value(_port_name, opcode); 901 if (sep == NULL) 902 sep = "???"; 903 bprintf(bp, " %s", sep); 904 } 905 sep = " "; 906 for (i = F_LEN((ipfw_insn *)cmd) - 1; i > 0; i--, p += 2) { 907 bprintf(bp, "%s", sep); 908 print_port(bp, proto, p[0]); 909 if (p[0] != p[1]) { 910 bprintf(bp, "-"); 911 print_port(bp, proto, p[1]); 912 } 913 sep = ","; 914 } 915} 916 917/* 918 * Like strtol, but also translates service names into port numbers 919 * for some protocols. 920 * In particular: 921 * proto == -1 disables the protocol check; 922 * proto == IPPROTO_ETHERTYPE looks up an internal table 923 * proto == <some value in /etc/protocols> matches the values there. 924 * Returns *end == s in case the parameter is not found. 925 */ 926static int 927strtoport(char *s, char **end, int base, int proto) 928{ 929 char *p, *buf; 930 char *s1; 931 int i; 932 933 *end = s; /* default - not found */ 934 if (*s == '\0') 935 return 0; /* not found */ 936 937 if (isdigit(*s)) 938 return strtol(s, end, base); 939 940 /* 941 * find separator. '\\' escapes the next char. 942 */ 943 for (s1 = s; *s1 && (isalnum(*s1) || *s1 == '\\' || 944 *s1 == '_' || *s1 == '.') ; s1++) 945 if (*s1 == '\\' && s1[1] != '\0') 946 s1++; 947 948 buf = safe_calloc(s1 - s + 1, 1); 949 950 /* 951 * copy into a buffer skipping backslashes 952 */ 953 for (p = s, i = 0; p != s1 ; p++) 954 if (*p != '\\') 955 buf[i++] = *p; 956 buf[i++] = '\0'; 957 958 if (proto == IPPROTO_ETHERTYPE) { 959 i = match_token(ether_types, buf); 960 free(buf); 961 if (i != -1) { /* found */ 962 *end = s1; 963 return i; 964 } 965 } else { 966 struct protoent *pe = NULL; 967 struct servent *se; 968 969 if (proto != 0) 970 pe = getprotobynumber(proto); 971 setservent(1); 972 se = getservbyname(buf, pe ? pe->p_name : NULL); 973 free(buf); 974 if (se != NULL) { 975 *end = s1; 976 return ntohs(se->s_port); 977 } 978 } 979 return 0; /* not found */ 980} 981 982/* 983 * Fill the body of the command with the list of port ranges. 984 */ 985static int 986fill_newports(ipfw_insn_u16 *cmd, char *av, int proto, int cblen) 987{ 988 uint16_t a, b, *p = cmd->ports; 989 int i = 0; 990 char *s = av; 991 992 while (*s) { 993 a = strtoport(av, &s, 0, proto); 994 if (s == av) /* empty or invalid argument */ 995 return (0); 996 997 CHECK_LENGTH(cblen, i + 2); 998 999 switch (*s) { 1000 case '-': /* a range */ 1001 av = s + 1; 1002 b = strtoport(av, &s, 0, proto); 1003 /* Reject expressions like '1-abc' or '1-2-3'. */ 1004 if (s == av || (*s != ',' && *s != '\0')) 1005 return (0); 1006 p[0] = a; 1007 p[1] = b; 1008 break; 1009 case ',': /* comma separated list */ 1010 case '\0': 1011 p[0] = p[1] = a; 1012 break; 1013 default: 1014 warnx("port list: invalid separator <%c> in <%s>", 1015 *s, av); 1016 return (0); 1017 } 1018 1019 i++; 1020 p += 2; 1021 av = s + 1; 1022 } 1023 if (i > 0) { 1024 if (i + 1 > F_LEN_MASK) 1025 errx(EX_DATAERR, "too many ports/ranges\n"); 1026 cmd->o.len |= i + 1; /* leave F_NOT and F_OR untouched */ 1027 } 1028 return (i); 1029} 1030 1031/* 1032 * Fill the body of the command with the list of DiffServ codepoints. 1033 */ 1034static void 1035fill_dscp(ipfw_insn *cmd, char *av, int cblen) 1036{ 1037 uint32_t *low, *high; 1038 char *s = av, *a; 1039 int code; 1040 1041 cmd->opcode = O_DSCP; 1042 cmd->len |= F_INSN_SIZE(ipfw_insn_u32) + 1; 1043 1044 CHECK_CMDLEN; 1045 1046 low = (uint32_t *)(cmd + 1); 1047 high = low + 1; 1048 1049 *low = 0; 1050 *high = 0; 1051 1052 while (s != NULL) { 1053 a = strchr(s, ','); 1054 1055 if (a != NULL) 1056 *a++ = '\0'; 1057 1058 if (isalpha(*s)) { 1059 if ((code = match_token(f_ipdscp, s)) == -1) 1060 errx(EX_DATAERR, "Unknown DSCP code"); 1061 } else { 1062 code = strtoul(s, NULL, 10); 1063 if (code < 0 || code > 63) 1064 errx(EX_DATAERR, "Invalid DSCP value"); 1065 } 1066 1067 if (code >= 32) 1068 *high |= 1 << (code - 32); 1069 else 1070 *low |= 1 << code; 1071 1072 s = a; 1073 } 1074} 1075 1076static struct _s_x icmpcodes[] = { 1077 { "net", ICMP_UNREACH_NET }, 1078 { "host", ICMP_UNREACH_HOST }, 1079 { "protocol", ICMP_UNREACH_PROTOCOL }, 1080 { "port", ICMP_UNREACH_PORT }, 1081 { "needfrag", ICMP_UNREACH_NEEDFRAG }, 1082 { "srcfail", ICMP_UNREACH_SRCFAIL }, 1083 { "net-unknown", ICMP_UNREACH_NET_UNKNOWN }, 1084 { "host-unknown", ICMP_UNREACH_HOST_UNKNOWN }, 1085 { "isolated", ICMP_UNREACH_ISOLATED }, 1086 { "net-prohib", ICMP_UNREACH_NET_PROHIB }, 1087 { "host-prohib", ICMP_UNREACH_HOST_PROHIB }, 1088 { "tosnet", ICMP_UNREACH_TOSNET }, 1089 { "toshost", ICMP_UNREACH_TOSHOST }, 1090 { "filter-prohib", ICMP_UNREACH_FILTER_PROHIB }, 1091 { "host-precedence", ICMP_UNREACH_HOST_PRECEDENCE }, 1092 { "precedence-cutoff", ICMP_UNREACH_PRECEDENCE_CUTOFF }, 1093 { NULL, 0 } 1094}; 1095 1096static void 1097fill_reject_code(u_short *codep, char *str) 1098{ 1099 int val; 1100 char *s; 1101 1102 val = strtoul(str, &s, 0); 1103 if (s == str || *s != '\0' || val >= 0x100) 1104 val = match_token(icmpcodes, str); 1105 if (val < 0) 1106 errx(EX_DATAERR, "unknown ICMP unreachable code ``%s''", str); 1107 *codep = val; 1108 return; 1109} 1110 1111static void 1112print_reject_code(struct buf_pr *bp, uint16_t code) 1113{ 1114 char const *s; 1115 1116 if ((s = match_value(icmpcodes, code)) != NULL) 1117 bprintf(bp, "unreach %s", s); 1118 else 1119 bprintf(bp, "unreach %u", code); 1120} 1121 1122/* 1123 * Returns the number of bits set (from left) in a contiguous bitmask, 1124 * or -1 if the mask is not contiguous. 1125 * XXX this needs a proper fix. 1126 * This effectively works on masks in big-endian (network) format. 1127 * when compiled on little endian architectures. 1128 * 1129 * First bit is bit 7 of the first byte -- note, for MAC addresses, 1130 * the first bit on the wire is bit 0 of the first byte. 1131 * len is the max length in bits. 1132 */ 1133int 1134contigmask(uint8_t *p, int len) 1135{ 1136 int i, n; 1137 1138 for (i=0; i<len ; i++) 1139 if ( (p[i/8] & (1 << (7 - (i%8)))) == 0) /* first bit unset */ 1140 break; 1141 for (n=i+1; n < len; n++) 1142 if ( (p[n/8] & (1 << (7 - (n%8)))) != 0) 1143 return -1; /* mask not contiguous */ 1144 return i; 1145} 1146 1147/* 1148 * print flags set/clear in the two bitmasks passed as parameters. 1149 * There is a specialized check for f_tcpflags. 1150 */ 1151static void 1152print_flags(struct buf_pr *bp, char const *name, ipfw_insn *cmd, 1153 struct _s_x *list) 1154{ 1155 char const *comma = ""; 1156 int i; 1157 uint8_t set = cmd->arg1 & 0xff; 1158 uint8_t clear = (cmd->arg1 >> 8) & 0xff; 1159 1160 if (list == f_tcpflags && set == TH_SYN && clear == TH_ACK) { 1161 bprintf(bp, " setup"); 1162 return; 1163 } 1164 1165 bprintf(bp, " %s ", name); 1166 for (i=0; list[i].x != 0; i++) { 1167 if (set & list[i].x) { 1168 set &= ~list[i].x; 1169 bprintf(bp, "%s%s", comma, list[i].s); 1170 comma = ","; 1171 } 1172 if (clear & list[i].x) { 1173 clear &= ~list[i].x; 1174 bprintf(bp, "%s!%s", comma, list[i].s); 1175 comma = ","; 1176 } 1177 } 1178} 1179 1180 1181/* 1182 * Print the ip address contained in a command. 1183 */ 1184static void 1185print_ip(struct buf_pr *bp, const struct format_opts *fo, ipfw_insn_ip *cmd) 1186{ 1187 struct hostent *he = NULL; 1188 struct in_addr *ia; 1189 uint32_t len = F_LEN((ipfw_insn *)cmd); 1190 uint32_t *a = ((ipfw_insn_u32 *)cmd)->d; 1191 char *t; 1192 1193 bprintf(bp, " "); 1194 if (cmd->o.opcode == O_IP_DST_LOOKUP && len > F_INSN_SIZE(ipfw_insn_u32)) { 1195 uint32_t d = a[1]; 1196 const char *arg = "<invalid>"; 1197 1198 if (d < sizeof(lookup_key)/sizeof(lookup_key[0])) 1199 arg = match_value(rule_options, lookup_key[d]); 1200 t = table_search_ctlv(fo->tstate, ((ipfw_insn *)cmd)->arg1); 1201 bprintf(bp, "lookup %s %s", arg, t); 1202 return; 1203 } 1204 if (cmd->o.opcode == O_IP_SRC_ME || cmd->o.opcode == O_IP_DST_ME) { 1205 bprintf(bp, "me"); 1206 return; 1207 } 1208 if (cmd->o.opcode == O_IP_SRC_LOOKUP || 1209 cmd->o.opcode == O_IP_DST_LOOKUP) { 1210 t = table_search_ctlv(fo->tstate, ((ipfw_insn *)cmd)->arg1); 1211 bprintf(bp, "table(%s", t); 1212 if (len == F_INSN_SIZE(ipfw_insn_u32)) 1213 bprintf(bp, ",%u", *a); 1214 bprintf(bp, ")"); 1215 return; 1216 } 1217 if (cmd->o.opcode == O_IP_SRC_SET || cmd->o.opcode == O_IP_DST_SET) { 1218 uint32_t x, *map = (uint32_t *)&(cmd->mask); 1219 int i, j; 1220 char comma = '{'; 1221 1222 x = cmd->o.arg1 - 1; 1223 x = htonl( ~x ); 1224 cmd->addr.s_addr = htonl(cmd->addr.s_addr); 1225 bprintf(bp, "%s/%d", inet_ntoa(cmd->addr), 1226 contigmask((uint8_t *)&x, 32)); 1227 x = cmd->addr.s_addr = htonl(cmd->addr.s_addr); 1228 x &= 0xff; /* base */ 1229 /* 1230 * Print bits and ranges. 1231 * Locate first bit set (i), then locate first bit unset (j). 1232 * If we have 3+ consecutive bits set, then print them as a 1233 * range, otherwise only print the initial bit and rescan. 1234 */ 1235 for (i=0; i < cmd->o.arg1; i++) 1236 if (map[i/32] & (1<<(i & 31))) { 1237 for (j=i+1; j < cmd->o.arg1; j++) 1238 if (!(map[ j/32] & (1<<(j & 31)))) 1239 break; 1240 bprintf(bp, "%c%d", comma, i+x); 1241 if (j>i+2) { /* range has at least 3 elements */ 1242 bprintf(bp, "-%d", j-1+x); 1243 i = j-1; 1244 } 1245 comma = ','; 1246 } 1247 bprintf(bp, "}"); 1248 return; 1249 } 1250 /* 1251 * len == 2 indicates a single IP, whereas lists of 1 or more 1252 * addr/mask pairs have len = (2n+1). We convert len to n so we 1253 * use that to count the number of entries. 1254 */ 1255 for (len = len / 2; len > 0; len--, a += 2) { 1256 int mb = /* mask length */ 1257 (cmd->o.opcode == O_IP_SRC || cmd->o.opcode == O_IP_DST) ? 1258 32 : contigmask((uint8_t *)&(a[1]), 32); 1259 if (mb == 32 && co.do_resolv) 1260 he = gethostbyaddr((char *)&(a[0]), sizeof(in_addr_t), 1261 AF_INET); 1262 if (he != NULL) /* resolved to name */ 1263 bprintf(bp, "%s", he->h_name); 1264 else if (mb == 0) /* any */ 1265 bprintf(bp, "any"); 1266 else { /* numeric IP followed by some kind of mask */ 1267 ia = (struct in_addr *)&a[0]; 1268 bprintf(bp, "%s", inet_ntoa(*ia)); 1269 if (mb < 0) { 1270 ia = (struct in_addr *)&a[1]; 1271 bprintf(bp, ":%s", inet_ntoa(*ia)); 1272 } else if (mb < 32) 1273 bprintf(bp, "/%d", mb); 1274 } 1275 if (len > 1) 1276 bprintf(bp, ","); 1277 } 1278} 1279 1280/* 1281 * prints a MAC address/mask pair 1282 */ 1283static void 1284format_mac(struct buf_pr *bp, uint8_t *addr, uint8_t *mask) 1285{ 1286 int l = contigmask(mask, 48); 1287 1288 if (l == 0) 1289 bprintf(bp, " any"); 1290 else { 1291 bprintf(bp, " %02x:%02x:%02x:%02x:%02x:%02x", 1292 addr[0], addr[1], addr[2], addr[3], addr[4], addr[5]); 1293 if (l == -1) 1294 bprintf(bp, "&%02x:%02x:%02x:%02x:%02x:%02x", 1295 mask[0], mask[1], mask[2], 1296 mask[3], mask[4], mask[5]); 1297 else if (l < 48) 1298 bprintf(bp, "/%d", l); 1299 } 1300} 1301 1302static void 1303print_mac(struct buf_pr *bp, ipfw_insn_mac *mac) 1304{ 1305 1306 bprintf(bp, " MAC"); 1307 format_mac(bp, mac->addr, mac->mask); 1308 format_mac(bp, mac->addr + 6, mac->mask + 6); 1309} 1310 1311static void 1312fill_icmptypes(ipfw_insn_u32 *cmd, char *av) 1313{ 1314 uint8_t type; 1315 1316 cmd->d[0] = 0; 1317 while (*av) { 1318 if (*av == ',') 1319 av++; 1320 1321 type = strtoul(av, &av, 0); 1322 1323 if (*av != ',' && *av != '\0') 1324 errx(EX_DATAERR, "invalid ICMP type"); 1325 1326 if (type > 31) 1327 errx(EX_DATAERR, "ICMP type out of range"); 1328 1329 cmd->d[0] |= 1 << type; 1330 } 1331 cmd->o.opcode = O_ICMPTYPE; 1332 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32); 1333} 1334 1335static void 1336print_icmptypes(struct buf_pr *bp, ipfw_insn_u32 *cmd) 1337{ 1338 int i; 1339 char sep= ' '; 1340 1341 bprintf(bp, " icmptypes"); 1342 for (i = 0; i < 32; i++) { 1343 if ( (cmd->d[0] & (1 << (i))) == 0) 1344 continue; 1345 bprintf(bp, "%c%d", sep, i); 1346 sep = ','; 1347 } 1348} 1349 1350static void 1351print_dscp(struct buf_pr *bp, ipfw_insn_u32 *cmd) 1352{ 1353 int i = 0; 1354 uint32_t *v; 1355 char sep= ' '; 1356 const char *code; 1357 1358 bprintf(bp, " dscp"); 1359 v = cmd->d; 1360 while (i < 64) { 1361 if (*v & (1 << i)) { 1362 if ((code = match_value(f_ipdscp, i)) != NULL) 1363 bprintf(bp, "%c%s", sep, code); 1364 else 1365 bprintf(bp, "%c%d", sep, i); 1366 sep = ','; 1367 } 1368 1369 if ((++i % 32) == 0) 1370 v++; 1371 } 1372} 1373 1374#define insntod(cmd, type) ((ipfw_insn_ ## type *)(cmd)) 1375struct show_state { 1376 struct ip_fw_rule *rule; 1377 const ipfw_insn *eaction; 1378 uint8_t *printed; 1379 int flags; 1380#define HAVE_PROTO 0x0001 1381#define HAVE_SRCIP 0x0002 1382#define HAVE_DSTIP 0x0004 1383#define HAVE_PROBE_STATE 0x0008 1384 int proto; 1385 int or_block; 1386}; 1387 1388static int 1389init_show_state(struct show_state *state, struct ip_fw_rule *rule) 1390{ 1391 1392 state->printed = calloc(rule->cmd_len, sizeof(uint8_t)); 1393 if (state->printed == NULL) 1394 return (ENOMEM); 1395 state->rule = rule; 1396 state->eaction = NULL; 1397 state->flags = 0; 1398 state->proto = 0; 1399 state->or_block = 0; 1400 return (0); 1401} 1402 1403static void 1404free_show_state(struct show_state *state) 1405{ 1406 1407 free(state->printed); 1408} 1409 1410static uint8_t 1411is_printed_opcode(struct show_state *state, const ipfw_insn *cmd) 1412{ 1413 1414 return (state->printed[cmd - state->rule->cmd]); 1415} 1416 1417static void 1418mark_printed(struct show_state *state, const ipfw_insn *cmd) 1419{ 1420 1421 state->printed[cmd - state->rule->cmd] = 1; 1422} 1423 1424static void 1425print_limit_mask(struct buf_pr *bp, const ipfw_insn_limit *limit) 1426{ 1427 struct _s_x *p = limit_masks; 1428 char const *comma = " "; 1429 uint8_t x; 1430 1431 for (x = limit->limit_mask; p->x != 0; p++) { 1432 if ((x & p->x) == p->x) { 1433 x &= ~p->x; 1434 bprintf(bp, "%s%s", comma, p->s); 1435 comma = ","; 1436 } 1437 } 1438 bprint_uint_arg(bp, " ", limit->conn_limit); 1439} 1440 1441static int 1442print_instruction(struct buf_pr *bp, const struct format_opts *fo, 1443 struct show_state *state, ipfw_insn *cmd) 1444{ 1445 struct protoent *pe; 1446 struct passwd *pwd; 1447 struct group *grp; 1448 const char *s; 1449 double d; 1450 1451 if (is_printed_opcode(state, cmd)) 1452 return (0); 1453 if ((cmd->len & F_OR) != 0 && state->or_block == 0) 1454 bprintf(bp, " {"); 1455 if (cmd->opcode != O_IN && (cmd->len & F_NOT) != 0) 1456 bprintf(bp, " not"); 1457 1458 switch (cmd->opcode) { 1459 case O_PROB: 1460 d = 1.0 * insntod(cmd, u32)->d[0] / 0x7fffffff; 1461 bprintf(bp, "prob %f ", d); 1462 break; 1463 case O_PROBE_STATE: /* no need to print anything here */ 1464 state->flags |= HAVE_PROBE_STATE; 1465 break; 1466 case O_IP_SRC: 1467 case O_IP_SRC_LOOKUP: 1468 case O_IP_SRC_MASK: 1469 case O_IP_SRC_ME: 1470 case O_IP_SRC_SET: 1471 if (state->flags & HAVE_SRCIP) 1472 bprintf(bp, " src-ip"); 1473 print_ip(bp, fo, insntod(cmd, ip)); 1474 break; 1475 case O_IP_DST: 1476 case O_IP_DST_LOOKUP: 1477 case O_IP_DST_MASK: 1478 case O_IP_DST_ME: 1479 case O_IP_DST_SET: 1480 if (state->flags & HAVE_DSTIP) 1481 bprintf(bp, " dst-ip"); 1482 print_ip(bp, fo, insntod(cmd, ip)); 1483 break; 1484 case O_IP6_SRC: 1485 case O_IP6_SRC_MASK: 1486 case O_IP6_SRC_ME: 1487 if (state->flags & HAVE_SRCIP) 1488 bprintf(bp, " src-ip6"); 1489 print_ip6(bp, insntod(cmd, ip6)); 1490 break; 1491 case O_IP6_DST: 1492 case O_IP6_DST_MASK: 1493 case O_IP6_DST_ME: 1494 if (state->flags & HAVE_DSTIP) 1495 bprintf(bp, " dst-ip6"); 1496 print_ip6(bp, insntod(cmd, ip6)); 1497 break; 1498 case O_FLOW6ID: 1499 print_flow6id(bp, insntod(cmd, u32)); 1500 break; 1501 case O_IP_DSTPORT: 1502 case O_IP_SRCPORT: 1503 print_newports(bp, insntod(cmd, u16), state->proto, 1504 (state->flags & (HAVE_SRCIP | HAVE_DSTIP)) == 1505 (HAVE_SRCIP | HAVE_DSTIP) ? cmd->opcode: 0); 1506 break; 1507 case O_PROTO: 1508 pe = getprotobynumber(cmd->arg1); 1509 if (state->flags & HAVE_PROTO) 1510 bprintf(bp, " proto"); 1511 if (pe != NULL) 1512 bprintf(bp, " %s", pe->p_name); 1513 else 1514 bprintf(bp, " %u", cmd->arg1); 1515 state->proto = cmd->arg1; 1516 break; 1517 case O_MACADDR2: 1518 print_mac(bp, insntod(cmd, mac)); 1519 break; 1520 case O_MAC_TYPE: 1521 print_newports(bp, insntod(cmd, u16), 1522 IPPROTO_ETHERTYPE, cmd->opcode); 1523 break; 1524 case O_FRAG: 1525 bprintf(bp, " frag"); 1526 break; 1527 case O_FIB: 1528 bprintf(bp, " fib %u", cmd->arg1); 1529 break; 1530 case O_SOCKARG: 1531 bprintf(bp, " sockarg"); 1532 break; 1533 case O_IN: 1534 bprintf(bp, cmd->len & F_NOT ? " out" : " in"); 1535 break; 1536 case O_DIVERTED: 1537 switch (cmd->arg1) { 1538 case 3: 1539 bprintf(bp, " diverted"); 1540 break; 1541 case 2: 1542 bprintf(bp, " diverted-output"); 1543 break; 1544 case 1: 1545 bprintf(bp, " diverted-loopback"); 1546 break; 1547 default: 1548 bprintf(bp, " diverted-?<%u>", cmd->arg1); 1549 break; 1550 } 1551 break; 1552 case O_LAYER2: 1553 bprintf(bp, " layer2"); 1554 break; 1555 case O_XMIT: 1556 case O_RECV: 1557 case O_VIA: 1558 if (cmd->opcode == O_XMIT) 1559 s = "xmit"; 1560 else if (cmd->opcode == O_RECV) 1561 s = "recv"; 1562 else /* if (cmd->opcode == O_VIA) */ 1563 s = "via"; 1564 switch (insntod(cmd, if)->name[0]) { 1565 case '\0': 1566 bprintf(bp, " %s %s", s, 1567 inet_ntoa(insntod(cmd, if)->p.ip)); 1568 break; 1569 case '\1': 1570 bprintf(bp, " %s table(%s)", s, 1571 table_search_ctlv(fo->tstate, 1572 insntod(cmd, if)->p.kidx)); 1573 break; 1574 default: 1575 bprintf(bp, " %s %s", s, 1576 insntod(cmd, if)->name); 1577 } 1578 break; 1579 case O_IP_FLOW_LOOKUP: 1580 s = table_search_ctlv(fo->tstate, cmd->arg1); 1581 bprintf(bp, " flow table(%s", s); 1582 if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_u32)) 1583 bprintf(bp, ",%u", insntod(cmd, u32)->d[0]); 1584 bprintf(bp, ")"); 1585 break; 1586 case O_IPID: 1587 case O_IPTTL: 1588 case O_IPLEN: 1589 case O_TCPDATALEN: 1590 case O_TCPWIN: 1591 if (F_LEN(cmd) == 1) { 1592 switch (cmd->opcode) { 1593 case O_IPID: 1594 s = "ipid"; 1595 break; 1596 case O_IPTTL: 1597 s = "ipttl"; 1598 break; 1599 case O_IPLEN: 1600 s = "iplen"; 1601 break; 1602 case O_TCPDATALEN: 1603 s = "tcpdatalen"; 1604 break; 1605 case O_TCPWIN: 1606 s = "tcpwin"; 1607 break; 1608 } 1609 bprintf(bp, " %s %u", s, cmd->arg1); 1610 } else 1611 print_newports(bp, insntod(cmd, u16), 0, 1612 cmd->opcode); 1613 break; 1614 case O_IPVER: 1615 bprintf(bp, " ipver %u", cmd->arg1); 1616 break; 1617 case O_IPPRECEDENCE: 1618 bprintf(bp, " ipprecedence %u", cmd->arg1 >> 5); 1619 break; 1620 case O_DSCP: 1621 print_dscp(bp, insntod(cmd, u32)); 1622 break; 1623 case O_IPOPT: 1624 print_flags(bp, "ipoptions", cmd, f_ipopts); 1625 break; 1626 case O_IPTOS: 1627 print_flags(bp, "iptos", cmd, f_iptos); 1628 break; 1629 case O_ICMPTYPE: 1630 print_icmptypes(bp, insntod(cmd, u32)); 1631 break; 1632 case O_ESTAB: 1633 bprintf(bp, " established"); 1634 break; 1635 case O_TCPFLAGS: 1636 print_flags(bp, "tcpflags", cmd, f_tcpflags); 1637 break; 1638 case O_TCPOPTS: 1639 print_flags(bp, "tcpoptions", cmd, f_tcpopts); 1640 break; 1641 case O_TCPACK: 1642 bprintf(bp, " tcpack %d", 1643 ntohl(insntod(cmd, u32)->d[0])); 1644 break; 1645 case O_TCPSEQ: 1646 bprintf(bp, " tcpseq %d", 1647 ntohl(insntod(cmd, u32)->d[0])); 1648 break; 1649 case O_UID: 1650 pwd = getpwuid(insntod(cmd, u32)->d[0]); 1651 if (pwd != NULL) 1652 bprintf(bp, " uid %s", pwd->pw_name); 1653 else 1654 bprintf(bp, " uid %u", 1655 insntod(cmd, u32)->d[0]); 1656 break; 1657 case O_GID: 1658 grp = getgrgid(insntod(cmd, u32)->d[0]); 1659 if (grp != NULL) 1660 bprintf(bp, " gid %s", grp->gr_name); 1661 else 1662 bprintf(bp, " gid %u", 1663 insntod(cmd, u32)->d[0]); 1664 break; 1665 case O_JAIL: 1666 bprintf(bp, " jail %d", insntod(cmd, u32)->d[0]); 1667 break; 1668 case O_VERREVPATH: 1669 bprintf(bp, " verrevpath"); 1670 break; 1671 case O_VERSRCREACH: 1672 bprintf(bp, " versrcreach"); 1673 break; 1674 case O_ANTISPOOF: 1675 bprintf(bp, " antispoof"); 1676 break; 1677 case O_IPSEC: 1678 bprintf(bp, " ipsec"); 1679 break; 1680 case O_NOP: 1681 bprintf(bp, " // %s", (char *)(cmd + 1)); 1682 break; 1683 case O_KEEP_STATE: 1684 if (state->flags & HAVE_PROBE_STATE) 1685 bprintf(bp, " keep-state"); 1686 else 1687 bprintf(bp, " record-state"); 1688 bprintf(bp, " :%s", 1689 object_search_ctlv(fo->tstate, cmd->arg1, 1690 IPFW_TLV_STATE_NAME)); 1691 break; 1692 case O_LIMIT: 1693 if (state->flags & HAVE_PROBE_STATE) 1694 bprintf(bp, " limit"); 1695 else 1696 bprintf(bp, " set-limit"); 1697 print_limit_mask(bp, insntod(cmd, limit)); 1698 bprintf(bp, " :%s", 1699 object_search_ctlv(fo->tstate, cmd->arg1, 1700 IPFW_TLV_STATE_NAME)); 1701 break; 1702 case O_IP6: 1703 bprintf(bp, " ip6"); 1704 break; 1705 case O_IP4: 1706 bprintf(bp, " ip4"); 1707 break; 1708 case O_ICMP6TYPE: 1709 print_icmp6types(bp, insntod(cmd, u32)); 1710 break; 1711 case O_EXT_HDR: 1712 print_ext6hdr(bp, cmd); 1713 break; 1714 case O_TAGGED: 1715 if (F_LEN(cmd) == 1) 1716 bprint_uint_arg(bp, " tagged ", cmd->arg1); 1717 else 1718 print_newports(bp, insntod(cmd, u16), 1719 0, O_TAGGED); 1720 break; 1721 case O_SKIP_ACTION: 1722 bprintf(bp, " defer-immediate-action"); 1723 break; 1724 default: 1725 bprintf(bp, " [opcode %d len %d]", cmd->opcode, 1726 cmd->len); 1727 } 1728 if (cmd->len & F_OR) { 1729 bprintf(bp, " or"); 1730 state->or_block = 1; 1731 } else if (state->or_block != 0) { 1732 bprintf(bp, " }"); 1733 state->or_block = 0; 1734 } 1735 mark_printed(state, cmd); 1736 1737 return (1); 1738} 1739 1740static ipfw_insn * 1741print_opcode(struct buf_pr *bp, struct format_opts *fo, 1742 struct show_state *state, int opcode) 1743{ 1744 ipfw_insn *cmd; 1745 int l; 1746 1747 for (l = state->rule->act_ofs, cmd = state->rule->cmd; 1748 l > 0; l -= F_LEN(cmd), cmd += F_LEN(cmd)) { 1749 /* We use zero opcode to print the rest of options */ 1750 if (opcode >= 0 && cmd->opcode != opcode) 1751 continue; 1752 /* 1753 * Skip O_NOP, when we printing the rest 1754 * of options, it will be handled separately. 1755 */ 1756 if (cmd->opcode == O_NOP && opcode != O_NOP) 1757 continue; 1758 if (!print_instruction(bp, fo, state, cmd)) 1759 continue; 1760 return (cmd); 1761 } 1762 return (NULL); 1763} 1764 1765static void 1766print_fwd(struct buf_pr *bp, const ipfw_insn *cmd) 1767{ 1768 char buf[INET6_ADDRSTRLEN + IF_NAMESIZE + 2]; 1769 ipfw_insn_sa6 *sa6; 1770 ipfw_insn_sa *sa; 1771 uint16_t port; 1772 1773 if (cmd->opcode == O_FORWARD_IP) { 1774 sa = insntod(cmd, sa); 1775 port = sa->sa.sin_port; 1776 if (sa->sa.sin_addr.s_addr == INADDR_ANY) 1777 bprintf(bp, "fwd tablearg"); 1778 else 1779 bprintf(bp, "fwd %s", inet_ntoa(sa->sa.sin_addr)); 1780 } else { 1781 sa6 = insntod(cmd, sa6); 1782 port = sa6->sa.sin6_port; 1783 bprintf(bp, "fwd "); 1784 if (getnameinfo((const struct sockaddr *)&sa6->sa, 1785 sizeof(struct sockaddr_in6), buf, sizeof(buf), NULL, 0, 1786 NI_NUMERICHOST) == 0) 1787 bprintf(bp, "%s", buf); 1788 } 1789 if (port != 0) 1790 bprintf(bp, ",%u", port); 1791} 1792 1793static int 1794print_action_instruction(struct buf_pr *bp, const struct format_opts *fo, 1795 struct show_state *state, const ipfw_insn *cmd) 1796{ 1797 const char *s; 1798 1799 if (is_printed_opcode(state, cmd)) 1800 return (0); 1801 switch (cmd->opcode) { 1802 case O_CHECK_STATE: 1803 bprintf(bp, "check-state"); 1804 if (cmd->arg1 != 0) 1805 s = object_search_ctlv(fo->tstate, cmd->arg1, 1806 IPFW_TLV_STATE_NAME); 1807 else 1808 s = NULL; 1809 bprintf(bp, " :%s", s ? s: "any"); 1810 break; 1811 case O_ACCEPT: 1812 bprintf(bp, "allow"); 1813 break; 1814 case O_COUNT: 1815 bprintf(bp, "count"); 1816 break; 1817 case O_DENY: 1818 bprintf(bp, "deny"); 1819 break; 1820 case O_REJECT: 1821 if (cmd->arg1 == ICMP_REJECT_RST) 1822 bprintf(bp, "reset"); 1823 else if (cmd->arg1 == ICMP_REJECT_ABORT) 1824 bprintf(bp, "abort"); 1825 else if (cmd->arg1 == ICMP_UNREACH_HOST) 1826 bprintf(bp, "reject"); 1827 else 1828 print_reject_code(bp, cmd->arg1); 1829 break; 1830 case O_UNREACH6: 1831 if (cmd->arg1 == ICMP6_UNREACH_RST) 1832 bprintf(bp, "reset6"); 1833 else if (cmd->arg1 == ICMP6_UNREACH_ABORT) 1834 bprintf(bp, "abort6"); 1835 else 1836 print_unreach6_code(bp, cmd->arg1); 1837 break; 1838 case O_SKIPTO: 1839 bprint_uint_arg(bp, "skipto ", cmd->arg1); 1840 break; 1841 case O_PIPE: 1842 bprint_uint_arg(bp, "pipe ", cmd->arg1); 1843 break; 1844 case O_QUEUE: 1845 bprint_uint_arg(bp, "queue ", cmd->arg1); 1846 break; 1847 case O_DIVERT: 1848 bprint_uint_arg(bp, "divert ", cmd->arg1); 1849 break; 1850 case O_TEE: 1851 bprint_uint_arg(bp, "tee ", cmd->arg1); 1852 break; 1853 case O_NETGRAPH: 1854 bprint_uint_arg(bp, "netgraph ", cmd->arg1); 1855 break; 1856 case O_NGTEE: 1857 bprint_uint_arg(bp, "ngtee ", cmd->arg1); 1858 break; 1859 case O_FORWARD_IP: 1860 case O_FORWARD_IP6: 1861 print_fwd(bp, cmd); 1862 break; 1863 case O_LOG: 1864 if (insntod(cmd, log)->max_log > 0) 1865 bprintf(bp, " log logamount %d", 1866 insntod(cmd, log)->max_log); 1867 else 1868 bprintf(bp, " log"); 1869 break; 1870 case O_ALTQ: 1871#ifndef NO_ALTQ 1872 print_altq_cmd(bp, insntod(cmd, altq)); 1873#endif 1874 break; 1875 case O_TAG: 1876 bprint_uint_arg(bp, cmd->len & F_NOT ? " untag ": 1877 " tag ", cmd->arg1); 1878 break; 1879 case O_NAT: 1880 if (cmd->arg1 != IP_FW_NAT44_GLOBAL) 1881 bprint_uint_arg(bp, "nat ", cmd->arg1); 1882 else 1883 bprintf(bp, "nat global"); 1884 break; 1885 case O_SETFIB: 1886 if (cmd->arg1 == IP_FW_TARG) 1887 bprint_uint_arg(bp, "setfib ", cmd->arg1); 1888 else 1889 bprintf(bp, "setfib %u", cmd->arg1 & 0x7FFF); 1890 break; 1891 case O_EXTERNAL_ACTION: 1892 /* 1893 * The external action can consists of two following 1894 * each other opcodes - O_EXTERNAL_ACTION and 1895 * O_EXTERNAL_INSTANCE. The first contains the ID of 1896 * name of external action. The second contains the ID 1897 * of name of external action instance. 1898 * NOTE: in case when external action has no named 1899 * instances support, the second opcode isn't needed. 1900 */ 1901 state->eaction = cmd; 1902 s = object_search_ctlv(fo->tstate, cmd->arg1, 1903 IPFW_TLV_EACTION); 1904 if (match_token(rule_eactions, s) != -1) 1905 bprintf(bp, "%s", s); 1906 else 1907 bprintf(bp, "eaction %s", s); 1908 break; 1909 case O_EXTERNAL_INSTANCE: 1910 if (state->eaction == NULL) 1911 break; 1912 /* 1913 * XXX: we need to teach ipfw(9) to rewrite opcodes 1914 * in the user buffer on rule addition. When we add 1915 * the rule, we specify zero TLV type for 1916 * O_EXTERNAL_INSTANCE object. To show correct 1917 * rule after `ipfw add` we need to search instance 1918 * name with zero type. But when we do `ipfw show` 1919 * we calculate TLV type using IPFW_TLV_EACTION_NAME() 1920 * macro. 1921 */ 1922 s = object_search_ctlv(fo->tstate, cmd->arg1, 0); 1923 if (s == NULL) 1924 s = object_search_ctlv(fo->tstate, 1925 cmd->arg1, IPFW_TLV_EACTION_NAME( 1926 state->eaction->arg1)); 1927 bprintf(bp, " %s", s); 1928 break; 1929 case O_EXTERNAL_DATA: 1930 if (state->eaction == NULL) 1931 break; 1932 /* 1933 * Currently we support data formatting only for 1934 * external data with datalen u16. For unknown data 1935 * print its size in bytes. 1936 */ 1937 if (cmd->len == F_INSN_SIZE(ipfw_insn)) 1938 bprintf(bp, " %u", cmd->arg1); 1939 else 1940 bprintf(bp, " %ubytes", 1941 cmd->len * sizeof(uint32_t)); 1942 break; 1943 case O_SETDSCP: 1944 if (cmd->arg1 == IP_FW_TARG) { 1945 bprintf(bp, "setdscp tablearg"); 1946 break; 1947 } 1948 s = match_value(f_ipdscp, cmd->arg1 & 0x3F); 1949 if (s != NULL) 1950 bprintf(bp, "setdscp %s", s); 1951 else 1952 bprintf(bp, "setdscp %u", cmd->arg1 & 0x3F); 1953 break; 1954 case O_REASS: 1955 bprintf(bp, "reass"); 1956 break; 1957 case O_CALLRETURN: 1958 if (cmd->len & F_NOT) 1959 bprintf(bp, "return"); 1960 else 1961 bprint_uint_arg(bp, "call ", cmd->arg1); 1962 break; 1963 default: 1964 bprintf(bp, "** unrecognized action %d len %d ", 1965 cmd->opcode, cmd->len); 1966 } 1967 mark_printed(state, cmd); 1968 1969 return (1); 1970} 1971 1972 1973static ipfw_insn * 1974print_action(struct buf_pr *bp, struct format_opts *fo, 1975 struct show_state *state, uint8_t opcode) 1976{ 1977 ipfw_insn *cmd; 1978 int l; 1979 1980 for (l = state->rule->cmd_len - state->rule->act_ofs, 1981 cmd = ACTION_PTR(state->rule); l > 0; 1982 l -= F_LEN(cmd), cmd += F_LEN(cmd)) { 1983 if (cmd->opcode != opcode) 1984 continue; 1985 if (!print_action_instruction(bp, fo, state, cmd)) 1986 continue; 1987 return (cmd); 1988 } 1989 return (NULL); 1990} 1991 1992static void 1993print_proto(struct buf_pr *bp, struct format_opts *fo, 1994 struct show_state *state) 1995{ 1996 ipfw_insn *cmd; 1997 int l, proto, ip4, ip6; 1998 1999 /* Count all O_PROTO, O_IP4, O_IP6 instructions. */ 2000 proto = ip4 = ip6 = 0; 2001 for (l = state->rule->act_ofs, cmd = state->rule->cmd; 2002 l > 0; l -= F_LEN(cmd), cmd += F_LEN(cmd)) { 2003 switch (cmd->opcode) { 2004 case O_PROTO: 2005 proto++; 2006 break; 2007 case O_IP4: 2008 ip4 = 1; 2009 if (cmd->len & F_OR) 2010 ip4++; 2011 break; 2012 case O_IP6: 2013 ip6 = 1; 2014 if (cmd->len & F_OR) 2015 ip6++; 2016 break; 2017 default: 2018 continue; 2019 } 2020 } 2021 if (proto == 0 && ip4 == 0 && ip6 == 0) { 2022 state->proto = IPPROTO_IP; 2023 state->flags |= HAVE_PROTO; 2024 bprintf(bp, " ip"); 2025 return; 2026 } 2027 /* To handle the case { ip4 or ip6 }, print opcode with F_OR first */ 2028 cmd = NULL; 2029 if (ip4 || ip6) 2030 cmd = print_opcode(bp, fo, state, ip4 > ip6 ? O_IP4: O_IP6); 2031 if (cmd != NULL && (cmd->len & F_OR)) 2032 cmd = print_opcode(bp, fo, state, ip4 > ip6 ? O_IP6: O_IP4); 2033 if (cmd == NULL || (cmd->len & F_OR)) 2034 for (l = proto; l > 0; l--) { 2035 cmd = print_opcode(bp, fo, state, O_PROTO); 2036 if (cmd == NULL || (cmd->len & F_OR) == 0) 2037 break; 2038 } 2039 /* Initialize proto, it is used by print_newports() */ 2040 state->flags |= HAVE_PROTO; 2041 if (state->proto == 0 && ip6 != 0) 2042 state->proto = IPPROTO_IPV6; 2043} 2044 2045static int 2046match_opcode(int opcode, const int opcodes[], size_t nops) 2047{ 2048 int i; 2049 2050 for (i = 0; i < nops; i++) 2051 if (opcode == opcodes[i]) 2052 return (1); 2053 return (0); 2054} 2055 2056static void 2057print_address(struct buf_pr *bp, struct format_opts *fo, 2058 struct show_state *state, const int opcodes[], size_t nops, int portop, 2059 int flag) 2060{ 2061 ipfw_insn *cmd; 2062 int count, l, portcnt, pf; 2063 2064 count = portcnt = 0; 2065 for (l = state->rule->act_ofs, cmd = state->rule->cmd; 2066 l > 0; l -= F_LEN(cmd), cmd += F_LEN(cmd)) { 2067 if (match_opcode(cmd->opcode, opcodes, nops)) 2068 count++; 2069 else if (cmd->opcode == portop) 2070 portcnt++; 2071 } 2072 if (count == 0) 2073 bprintf(bp, " any"); 2074 for (l = state->rule->act_ofs, cmd = state->rule->cmd; 2075 l > 0 && count > 0; l -= F_LEN(cmd), cmd += F_LEN(cmd)) { 2076 if (!match_opcode(cmd->opcode, opcodes, nops)) 2077 continue; 2078 print_instruction(bp, fo, state, cmd); 2079 if ((cmd->len & F_OR) == 0) 2080 break; 2081 count--; 2082 } 2083 /* 2084 * If several O_IP_?PORT opcodes specified, leave them to the 2085 * options section. 2086 */ 2087 if (portcnt == 1) { 2088 for (l = state->rule->act_ofs, cmd = state->rule->cmd, pf = 0; 2089 l > 0; l -= F_LEN(cmd), cmd += F_LEN(cmd)) { 2090 if (cmd->opcode != portop) { 2091 pf = (cmd->len & F_OR); 2092 continue; 2093 } 2094 /* Print opcode iff it is not in OR block. */ 2095 if (pf == 0 && (cmd->len & F_OR) == 0) 2096 print_instruction(bp, fo, state, cmd); 2097 break; 2098 } 2099 } 2100 state->flags |= flag; 2101} 2102 2103static const int action_opcodes[] = { 2104 O_CHECK_STATE, O_ACCEPT, O_COUNT, O_DENY, O_REJECT, 2105 O_UNREACH6, O_SKIPTO, O_PIPE, O_QUEUE, O_DIVERT, O_TEE, 2106 O_NETGRAPH, O_NGTEE, O_FORWARD_IP, O_FORWARD_IP6, O_NAT, 2107 O_SETFIB, O_SETDSCP, O_REASS, O_CALLRETURN, 2108 /* keep the following opcodes at the end of the list */ 2109 O_EXTERNAL_ACTION, O_EXTERNAL_INSTANCE, O_EXTERNAL_DATA 2110}; 2111 2112static const int modifier_opcodes[] = { 2113 O_LOG, O_ALTQ, O_TAG 2114}; 2115 2116static const int src_opcodes[] = { 2117 O_IP_SRC, O_IP_SRC_LOOKUP, O_IP_SRC_MASK, O_IP_SRC_ME, 2118 O_IP_SRC_SET, O_IP6_SRC, O_IP6_SRC_MASK, O_IP6_SRC_ME 2119}; 2120 2121static const int dst_opcodes[] = { 2122 O_IP_DST, O_IP_DST_LOOKUP, O_IP_DST_MASK, O_IP_DST_ME, 2123 O_IP_DST_SET, O_IP6_DST, O_IP6_DST_MASK, O_IP6_DST_ME 2124}; 2125 2126static void 2127show_static_rule(struct cmdline_opts *co, struct format_opts *fo, 2128 struct buf_pr *bp, struct ip_fw_rule *rule, struct ip_fw_bcounter *cntr) 2129{ 2130 struct show_state state; 2131 ipfw_insn *cmd; 2132 static int twidth = 0; 2133 int i; 2134 2135 /* Print # DISABLED or skip the rule */ 2136 if ((fo->set_mask & (1 << rule->set)) == 0) { 2137 /* disabled mask */ 2138 if (!co->show_sets) 2139 return; 2140 else 2141 bprintf(bp, "# DISABLED "); 2142 } 2143 if (init_show_state(&state, rule) != 0) { 2144 warn("init_show_state() failed"); 2145 return; 2146 } 2147 bprintf(bp, "%05u ", rule->rulenum); 2148 2149 /* Print counters if enabled */ 2150 if (fo->pcwidth > 0 || fo->bcwidth > 0) { 2151 pr_u64(bp, &cntr->pcnt, fo->pcwidth); 2152 pr_u64(bp, &cntr->bcnt, fo->bcwidth); 2153 } 2154 2155 /* Print timestamp */ 2156 if (co->do_time == TIMESTAMP_NUMERIC) 2157 bprintf(bp, "%10u ", cntr->timestamp); 2158 else if (co->do_time == TIMESTAMP_STRING) { 2159 char timestr[30]; 2160 time_t t = (time_t)0; 2161 2162 if (twidth == 0) { 2163 strcpy(timestr, ctime(&t)); 2164 *strchr(timestr, '\n') = '\0'; 2165 twidth = strlen(timestr); 2166 } 2167 if (cntr->timestamp > 0) { 2168 t = _long_to_time(cntr->timestamp); 2169 2170 strcpy(timestr, ctime(&t)); 2171 *strchr(timestr, '\n') = '\0'; 2172 bprintf(bp, "%s ", timestr); 2173 } else { 2174 bprintf(bp, "%*s", twidth, " "); 2175 } 2176 } 2177 2178 /* Print set number */ 2179 if (co->show_sets) 2180 bprintf(bp, "set %d ", rule->set); 2181 2182 /* Print the optional "match probability" */ 2183 cmd = print_opcode(bp, fo, &state, O_PROB); 2184 /* Print rule action */ 2185 for (i = 0; i < nitems(action_opcodes); i++) { 2186 cmd = print_action(bp, fo, &state, action_opcodes[i]); 2187 if (cmd == NULL) 2188 continue; 2189 /* Handle special cases */ 2190 switch (cmd->opcode) { 2191 case O_CHECK_STATE: 2192 goto end; 2193 case O_EXTERNAL_ACTION: 2194 case O_EXTERNAL_INSTANCE: 2195 /* External action can have several instructions */ 2196 continue; 2197 } 2198 break; 2199 } 2200 /* Print rule modifiers */ 2201 for (i = 0; i < nitems(modifier_opcodes); i++) 2202 print_action(bp, fo, &state, modifier_opcodes[i]); 2203 /* 2204 * Print rule body 2205 */ 2206 if (co->comment_only != 0) 2207 goto end; 2208 2209 if (rule->flags & IPFW_RULE_JUSTOPTS) { 2210 state.flags |= HAVE_PROTO | HAVE_SRCIP | HAVE_DSTIP; 2211 goto justopts; 2212 } 2213 2214 print_proto(bp, fo, &state); 2215 2216 /* Print source */ 2217 bprintf(bp, " from"); 2218 print_address(bp, fo, &state, src_opcodes, nitems(src_opcodes), 2219 O_IP_SRCPORT, HAVE_SRCIP); 2220 2221 /* Print destination */ 2222 bprintf(bp, " to"); 2223 print_address(bp, fo, &state, dst_opcodes, nitems(dst_opcodes), 2224 O_IP_DSTPORT, HAVE_DSTIP); 2225 2226justopts: 2227 /* Print the rest of options */ 2228 while (print_opcode(bp, fo, &state, -1)) 2229 ; 2230end: 2231 /* Print comment at the end */ 2232 cmd = print_opcode(bp, fo, &state, O_NOP); 2233 if (co->comment_only != 0 && cmd == NULL) 2234 bprintf(bp, " // ..."); 2235 bprintf(bp, "\n"); 2236 free_show_state(&state); 2237} 2238 2239static void 2240show_dyn_state(struct cmdline_opts *co, struct format_opts *fo, 2241 struct buf_pr *bp, ipfw_dyn_rule *d) 2242{ 2243 struct protoent *pe; 2244 struct in_addr a; 2245 uint16_t rulenum; 2246 char buf[INET6_ADDRSTRLEN]; 2247 2248 if (!co->do_expired) { 2249 if (!d->expire && !(d->dyn_type == O_LIMIT_PARENT)) 2250 return; 2251 } 2252 bcopy(&d->rule, &rulenum, sizeof(rulenum)); 2253 bprintf(bp, "%05d", rulenum); 2254 if (fo->pcwidth > 0 || fo->bcwidth > 0) { 2255 bprintf(bp, " "); 2256 pr_u64(bp, &d->pcnt, fo->pcwidth); 2257 pr_u64(bp, &d->bcnt, fo->bcwidth); 2258 bprintf(bp, "(%ds)", d->expire); 2259 } 2260 switch (d->dyn_type) { 2261 case O_LIMIT_PARENT: 2262 bprintf(bp, " PARENT %d", d->count); 2263 break; 2264 case O_LIMIT: 2265 bprintf(bp, " LIMIT"); 2266 break; 2267 case O_KEEP_STATE: /* bidir, no mask */ 2268 bprintf(bp, " STATE"); 2269 break; 2270 } 2271 2272 if ((pe = getprotobynumber(d->id.proto)) != NULL) 2273 bprintf(bp, " %s", pe->p_name); 2274 else 2275 bprintf(bp, " proto %u", d->id.proto); 2276 2277 if (d->id.addr_type == 4) { 2278 a.s_addr = htonl(d->id.src_ip); 2279 bprintf(bp, " %s %d", inet_ntoa(a), d->id.src_port); 2280 2281 a.s_addr = htonl(d->id.dst_ip); 2282 bprintf(bp, " <-> %s %d", inet_ntoa(a), d->id.dst_port); 2283 } else if (d->id.addr_type == 6) { 2284 bprintf(bp, " %s %d", inet_ntop(AF_INET6, &d->id.src_ip6, buf, 2285 sizeof(buf)), d->id.src_port); 2286 bprintf(bp, " <-> %s %d", inet_ntop(AF_INET6, &d->id.dst_ip6, 2287 buf, sizeof(buf)), d->id.dst_port); 2288 } else 2289 bprintf(bp, " UNKNOWN <-> UNKNOWN"); 2290 if (d->kidx != 0) 2291 bprintf(bp, " :%s", object_search_ctlv(fo->tstate, 2292 d->kidx, IPFW_TLV_STATE_NAME)); 2293} 2294 2295static int 2296do_range_cmd(int cmd, ipfw_range_tlv *rt) 2297{ 2298 ipfw_range_header rh; 2299 size_t sz; 2300 2301 memset(&rh, 0, sizeof(rh)); 2302 memcpy(&rh.range, rt, sizeof(*rt)); 2303 rh.range.head.length = sizeof(*rt); 2304 rh.range.head.type = IPFW_TLV_RANGE; 2305 sz = sizeof(rh); 2306 2307 if (do_get3(cmd, &rh.opheader, &sz) != 0) 2308 return (-1); 2309 /* Save number of matched objects */ 2310 rt->new_set = rh.range.new_set; 2311 return (0); 2312} 2313 2314/* 2315 * This one handles all set-related commands 2316 * ipfw set { show | enable | disable } 2317 * ipfw set swap X Y 2318 * ipfw set move X to Y 2319 * ipfw set move rule X to Y 2320 */ 2321void 2322ipfw_sets_handler(char *av[]) 2323{ 2324 ipfw_range_tlv rt; 2325 char *msg; 2326 size_t size; 2327 uint32_t masks[2]; 2328 int i; 2329 uint16_t rulenum; 2330 uint8_t cmd; 2331 2332 av++; 2333 memset(&rt, 0, sizeof(rt)); 2334 2335 if (av[0] == NULL) 2336 errx(EX_USAGE, "set needs command"); 2337 if (_substrcmp(*av, "show") == 0) { 2338 struct format_opts fo; 2339 ipfw_cfg_lheader *cfg; 2340 2341 memset(&fo, 0, sizeof(fo)); 2342 if (ipfw_get_config(&co, &fo, &cfg, &size) != 0) 2343 err(EX_OSERR, "requesting config failed"); 2344 2345 for (i = 0, msg = "disable"; i < RESVD_SET; i++) 2346 if ((cfg->set_mask & (1<<i)) == 0) { 2347 printf("%s %d", msg, i); 2348 msg = ""; 2349 } 2350 msg = (cfg->set_mask != (uint32_t)-1) ? " enable" : "enable"; 2351 for (i = 0; i < RESVD_SET; i++) 2352 if ((cfg->set_mask & (1<<i)) != 0) { 2353 printf("%s %d", msg, i); 2354 msg = ""; 2355 } 2356 printf("\n"); 2357 free(cfg); 2358 } else if (_substrcmp(*av, "swap") == 0) { 2359 av++; 2360 if ( av[0] == NULL || av[1] == NULL ) 2361 errx(EX_USAGE, "set swap needs 2 set numbers\n"); 2362 rt.set = atoi(av[0]); 2363 rt.new_set = atoi(av[1]); 2364 if (!isdigit(*(av[0])) || rt.set > RESVD_SET) 2365 errx(EX_DATAERR, "invalid set number %s\n", av[0]); 2366 if (!isdigit(*(av[1])) || rt.new_set > RESVD_SET) 2367 errx(EX_DATAERR, "invalid set number %s\n", av[1]); 2368 i = do_range_cmd(IP_FW_SET_SWAP, &rt); 2369 } else if (_substrcmp(*av, "move") == 0) { 2370 av++; 2371 if (av[0] && _substrcmp(*av, "rule") == 0) { 2372 rt.flags = IPFW_RCFLAG_RANGE; /* move rules to new set */ 2373 cmd = IP_FW_XMOVE; 2374 av++; 2375 } else 2376 cmd = IP_FW_SET_MOVE; /* Move set to new one */ 2377 if (av[0] == NULL || av[1] == NULL || av[2] == NULL || 2378 av[3] != NULL || _substrcmp(av[1], "to") != 0) 2379 errx(EX_USAGE, "syntax: set move [rule] X to Y\n"); 2380 rulenum = atoi(av[0]); 2381 rt.new_set = atoi(av[2]); 2382 if (cmd == IP_FW_XMOVE) { 2383 rt.start_rule = rulenum; 2384 rt.end_rule = rulenum; 2385 } else 2386 rt.set = rulenum; 2387 rt.new_set = atoi(av[2]); 2388 if (!isdigit(*(av[0])) || (cmd == 3 && rt.set > RESVD_SET) || 2389 (cmd == 2 && rt.start_rule == IPFW_DEFAULT_RULE) ) 2390 errx(EX_DATAERR, "invalid source number %s\n", av[0]); 2391 if (!isdigit(*(av[2])) || rt.new_set > RESVD_SET) 2392 errx(EX_DATAERR, "invalid dest. set %s\n", av[1]); 2393 i = do_range_cmd(cmd, &rt); 2394 if (i < 0) 2395 err(EX_OSERR, "failed to move %s", 2396 cmd == IP_FW_SET_MOVE ? "set": "rule"); 2397 } else if (_substrcmp(*av, "disable") == 0 || 2398 _substrcmp(*av, "enable") == 0 ) { 2399 int which = _substrcmp(*av, "enable") == 0 ? 1 : 0; 2400 2401 av++; 2402 masks[0] = masks[1] = 0; 2403 2404 while (av[0]) { 2405 if (isdigit(**av)) { 2406 i = atoi(*av); 2407 if (i < 0 || i > RESVD_SET) 2408 errx(EX_DATAERR, 2409 "invalid set number %d\n", i); 2410 masks[which] |= (1<<i); 2411 } else if (_substrcmp(*av, "disable") == 0) 2412 which = 0; 2413 else if (_substrcmp(*av, "enable") == 0) 2414 which = 1; 2415 else 2416 errx(EX_DATAERR, 2417 "invalid set command %s\n", *av); 2418 av++; 2419 } 2420 if ( (masks[0] & masks[1]) != 0 ) 2421 errx(EX_DATAERR, 2422 "cannot enable and disable the same set\n"); 2423 2424 rt.set = masks[0]; 2425 rt.new_set = masks[1]; 2426 i = do_range_cmd(IP_FW_SET_ENABLE, &rt); 2427 if (i) 2428 warn("set enable/disable: setsockopt(IP_FW_SET_ENABLE)"); 2429 } else 2430 errx(EX_USAGE, "invalid set command %s\n", *av); 2431} 2432 2433void 2434ipfw_sysctl_handler(char *av[], int which) 2435{ 2436 av++; 2437 2438 if (av[0] == NULL) { 2439 warnx("missing keyword to enable/disable\n"); 2440 } else if (_substrcmp(*av, "firewall") == 0) { 2441 sysctlbyname("net.inet.ip.fw.enable", NULL, 0, 2442 &which, sizeof(which)); 2443 sysctlbyname("net.inet6.ip6.fw.enable", NULL, 0, 2444 &which, sizeof(which)); 2445 } else if (_substrcmp(*av, "one_pass") == 0) { 2446 sysctlbyname("net.inet.ip.fw.one_pass", NULL, 0, 2447 &which, sizeof(which)); 2448 } else if (_substrcmp(*av, "debug") == 0) { 2449 sysctlbyname("net.inet.ip.fw.debug", NULL, 0, 2450 &which, sizeof(which)); 2451 } else if (_substrcmp(*av, "verbose") == 0) { 2452 sysctlbyname("net.inet.ip.fw.verbose", NULL, 0, 2453 &which, sizeof(which)); 2454 } else if (_substrcmp(*av, "dyn_keepalive") == 0) { 2455 sysctlbyname("net.inet.ip.fw.dyn_keepalive", NULL, 0, 2456 &which, sizeof(which)); 2457#ifndef NO_ALTQ 2458 } else if (_substrcmp(*av, "altq") == 0) { 2459 altq_set_enabled(which); 2460#endif 2461 } else { 2462 warnx("unrecognize enable/disable keyword: %s\n", *av); 2463 } 2464} 2465 2466typedef void state_cb(struct cmdline_opts *co, struct format_opts *fo, 2467 void *arg, void *state); 2468 2469static void 2470prepare_format_dyn(struct cmdline_opts *co, struct format_opts *fo, 2471 void *arg, void *_state) 2472{ 2473 ipfw_dyn_rule *d; 2474 int width; 2475 uint8_t set; 2476 2477 d = (ipfw_dyn_rule *)_state; 2478 /* Count _ALL_ states */ 2479 fo->dcnt++; 2480 2481 if (fo->show_counters == 0) 2482 return; 2483 2484 if (co->use_set) { 2485 /* skip states from another set */ 2486 bcopy((char *)&d->rule + sizeof(uint16_t), &set, 2487 sizeof(uint8_t)); 2488 if (set != co->use_set - 1) 2489 return; 2490 } 2491 2492 width = pr_u64(NULL, &d->pcnt, 0); 2493 if (width > fo->pcwidth) 2494 fo->pcwidth = width; 2495 2496 width = pr_u64(NULL, &d->bcnt, 0); 2497 if (width > fo->bcwidth) 2498 fo->bcwidth = width; 2499} 2500 2501static int 2502foreach_state(struct cmdline_opts *co, struct format_opts *fo, 2503 caddr_t base, size_t sz, state_cb dyn_bc, void *dyn_arg) 2504{ 2505 int ttype; 2506 state_cb *fptr; 2507 void *farg; 2508 ipfw_obj_tlv *tlv; 2509 ipfw_obj_ctlv *ctlv; 2510 2511 fptr = NULL; 2512 ttype = 0; 2513 2514 while (sz > 0) { 2515 ctlv = (ipfw_obj_ctlv *)base; 2516 switch (ctlv->head.type) { 2517 case IPFW_TLV_DYNSTATE_LIST: 2518 base += sizeof(*ctlv); 2519 sz -= sizeof(*ctlv); 2520 ttype = IPFW_TLV_DYN_ENT; 2521 fptr = dyn_bc; 2522 farg = dyn_arg; 2523 break; 2524 default: 2525 return (sz); 2526 } 2527 2528 while (sz > 0) { 2529 tlv = (ipfw_obj_tlv *)base; 2530 if (tlv->type != ttype) 2531 break; 2532 2533 fptr(co, fo, farg, tlv + 1); 2534 sz -= tlv->length; 2535 base += tlv->length; 2536 } 2537 } 2538 2539 return (sz); 2540} 2541 2542static void 2543prepare_format_opts(struct cmdline_opts *co, struct format_opts *fo, 2544 ipfw_obj_tlv *rtlv, int rcnt, caddr_t dynbase, size_t dynsz) 2545{ 2546 int bcwidth, pcwidth, width; 2547 int n; 2548 struct ip_fw_bcounter *cntr; 2549 struct ip_fw_rule *r; 2550 2551 bcwidth = 0; 2552 pcwidth = 0; 2553 if (fo->show_counters != 0) { 2554 for (n = 0; n < rcnt; n++, 2555 rtlv = (ipfw_obj_tlv *)((caddr_t)rtlv + rtlv->length)) { 2556 cntr = (struct ip_fw_bcounter *)(rtlv + 1); 2557 r = (struct ip_fw_rule *)((caddr_t)cntr + cntr->size); 2558 /* skip rules from another set */ 2559 if (co->use_set && r->set != co->use_set - 1) 2560 continue; 2561 2562 /* packet counter */ 2563 width = pr_u64(NULL, &cntr->pcnt, 0); 2564 if (width > pcwidth) 2565 pcwidth = width; 2566 2567 /* byte counter */ 2568 width = pr_u64(NULL, &cntr->bcnt, 0); 2569 if (width > bcwidth) 2570 bcwidth = width; 2571 } 2572 } 2573 fo->bcwidth = bcwidth; 2574 fo->pcwidth = pcwidth; 2575 2576 fo->dcnt = 0; 2577 if (co->do_dynamic && dynsz > 0) 2578 foreach_state(co, fo, dynbase, dynsz, prepare_format_dyn, NULL); 2579} 2580 2581static int 2582list_static_range(struct cmdline_opts *co, struct format_opts *fo, 2583 struct buf_pr *bp, ipfw_obj_tlv *rtlv, int rcnt) 2584{ 2585 int n, seen; 2586 struct ip_fw_rule *r; 2587 struct ip_fw_bcounter *cntr; 2588 int c = 0; 2589 2590 for (n = seen = 0; n < rcnt; n++, 2591 rtlv = (ipfw_obj_tlv *)((caddr_t)rtlv + rtlv->length)) { 2592 2593 if ((fo->show_counters | fo->show_time) != 0) { 2594 cntr = (struct ip_fw_bcounter *)(rtlv + 1); 2595 r = (struct ip_fw_rule *)((caddr_t)cntr + cntr->size); 2596 } else { 2597 cntr = NULL; 2598 r = (struct ip_fw_rule *)(rtlv + 1); 2599 } 2600 if (r->rulenum > fo->last) 2601 break; 2602 if (co->use_set && r->set != co->use_set - 1) 2603 continue; 2604 if (r->rulenum >= fo->first && r->rulenum <= fo->last) { 2605 show_static_rule(co, fo, bp, r, cntr); 2606 printf("%s", bp->buf); 2607 c += rtlv->length; 2608 bp_flush(bp); 2609 seen++; 2610 } 2611 } 2612 2613 return (seen); 2614} 2615 2616static void 2617list_dyn_state(struct cmdline_opts *co, struct format_opts *fo, 2618 void *_arg, void *_state) 2619{ 2620 uint16_t rulenum; 2621 uint8_t set; 2622 ipfw_dyn_rule *d; 2623 struct buf_pr *bp; 2624 2625 d = (ipfw_dyn_rule *)_state; 2626 bp = (struct buf_pr *)_arg; 2627 2628 bcopy(&d->rule, &rulenum, sizeof(rulenum)); 2629 if (rulenum > fo->last) 2630 return; 2631 if (co->use_set) { 2632 bcopy((char *)&d->rule + sizeof(uint16_t), 2633 &set, sizeof(uint8_t)); 2634 if (set != co->use_set - 1) 2635 return; 2636 } 2637 if (rulenum >= fo->first) { 2638 show_dyn_state(co, fo, bp, d); 2639 printf("%s\n", bp->buf); 2640 bp_flush(bp); 2641 } 2642} 2643 2644static int 2645list_dyn_range(struct cmdline_opts *co, struct format_opts *fo, 2646 struct buf_pr *bp, caddr_t base, size_t sz) 2647{ 2648 2649 sz = foreach_state(co, fo, base, sz, list_dyn_state, bp); 2650 return (sz); 2651} 2652 2653void 2654ipfw_list(int ac, char *av[], int show_counters) 2655{ 2656 ipfw_cfg_lheader *cfg; 2657 struct format_opts sfo; 2658 size_t sz; 2659 int error; 2660 int lac; 2661 char **lav; 2662 uint32_t rnum; 2663 char *endptr; 2664 2665 if (co.test_only) { 2666 fprintf(stderr, "Testing only, list disabled\n"); 2667 return; 2668 } 2669 if (co.do_pipe) { 2670 dummynet_list(ac, av, show_counters); 2671 return; 2672 } 2673 2674 ac--; 2675 av++; 2676 memset(&sfo, 0, sizeof(sfo)); 2677 2678 /* Determine rule range to request */ 2679 if (ac > 0) { 2680 for (lac = ac, lav = av; lac != 0; lac--) { 2681 rnum = strtoul(*lav++, &endptr, 10); 2682 if (sfo.first == 0 || rnum < sfo.first) 2683 sfo.first = rnum; 2684 2685 if (*endptr == '-') 2686 rnum = strtoul(endptr + 1, &endptr, 10); 2687 if (sfo.last == 0 || rnum > sfo.last) 2688 sfo.last = rnum; 2689 } 2690 } 2691 2692 /* get configuraion from kernel */ 2693 cfg = NULL; 2694 sfo.show_counters = show_counters; 2695 sfo.show_time = co.do_time; 2696 sfo.flags = IPFW_CFG_GET_STATIC; 2697 if (co.do_dynamic != 0) 2698 sfo.flags |= IPFW_CFG_GET_STATES; 2699 if ((sfo.show_counters | sfo.show_time) != 0) 2700 sfo.flags |= IPFW_CFG_GET_COUNTERS; 2701 if (ipfw_get_config(&co, &sfo, &cfg, &sz) != 0) 2702 err(EX_OSERR, "retrieving config failed"); 2703 2704 error = ipfw_show_config(&co, &sfo, cfg, sz, ac, av); 2705 2706 free(cfg); 2707 2708 if (error != EX_OK) 2709 exit(error); 2710} 2711 2712static int 2713ipfw_show_config(struct cmdline_opts *co, struct format_opts *fo, 2714 ipfw_cfg_lheader *cfg, size_t sz, int ac, char *av[]) 2715{ 2716 caddr_t dynbase; 2717 size_t dynsz; 2718 int rcnt; 2719 int exitval = EX_OK; 2720 int lac; 2721 char **lav; 2722 char *endptr; 2723 size_t readsz; 2724 struct buf_pr bp; 2725 ipfw_obj_ctlv *ctlv, *tstate; 2726 ipfw_obj_tlv *rbase; 2727 2728 /* 2729 * Handle tablenames TLV first, if any 2730 */ 2731 tstate = NULL; 2732 rbase = NULL; 2733 dynbase = NULL; 2734 dynsz = 0; 2735 readsz = sizeof(*cfg); 2736 rcnt = 0; 2737 2738 fo->set_mask = cfg->set_mask; 2739 2740 ctlv = (ipfw_obj_ctlv *)(cfg + 1); 2741 2742 if (cfg->flags & IPFW_CFG_GET_STATIC) { 2743 /* We've requested static rules */ 2744 if (ctlv->head.type == IPFW_TLV_TBLNAME_LIST) { 2745 object_sort_ctlv(ctlv); 2746 fo->tstate = ctlv; 2747 readsz += ctlv->head.length; 2748 ctlv = (ipfw_obj_ctlv *)((caddr_t)ctlv + 2749 ctlv->head.length); 2750 } 2751 2752 if (ctlv->head.type == IPFW_TLV_RULE_LIST) { 2753 rbase = (ipfw_obj_tlv *)(ctlv + 1); 2754 rcnt = ctlv->count; 2755 readsz += ctlv->head.length; 2756 ctlv = (ipfw_obj_ctlv *)((caddr_t)ctlv + 2757 ctlv->head.length); 2758 } 2759 } 2760 2761 if ((cfg->flags & IPFW_CFG_GET_STATES) && (readsz != sz)) { 2762 /* We may have some dynamic states */ 2763 dynsz = sz - readsz; 2764 /* Skip empty header */ 2765 if (dynsz != sizeof(ipfw_obj_ctlv)) 2766 dynbase = (caddr_t)ctlv; 2767 else 2768 dynsz = 0; 2769 } 2770 2771 prepare_format_opts(co, fo, rbase, rcnt, dynbase, dynsz); 2772 bp_alloc(&bp, 4096); 2773 2774 /* if no rule numbers were specified, list all rules */ 2775 if (ac == 0) { 2776 fo->first = 0; 2777 fo->last = IPFW_DEFAULT_RULE; 2778 list_static_range(co, fo, &bp, rbase, rcnt); 2779 2780 if (co->do_dynamic && dynsz > 0) { 2781 printf("## Dynamic rules (%d %zu):\n", fo->dcnt, dynsz); 2782 list_dyn_range(co, fo, &bp, dynbase, dynsz); 2783 } 2784 2785 bp_free(&bp); 2786 return (EX_OK); 2787 } 2788 2789 /* display specific rules requested on command line */ 2790 for (lac = ac, lav = av; lac != 0; lac--) { 2791 /* convert command line rule # */ 2792 fo->last = fo->first = strtoul(*lav++, &endptr, 10); 2793 if (*endptr == '-') 2794 fo->last = strtoul(endptr + 1, &endptr, 10); 2795 if (*endptr) { 2796 exitval = EX_USAGE; 2797 warnx("invalid rule number: %s", *(lav - 1)); 2798 continue; 2799 } 2800 2801 if (list_static_range(co, fo, &bp, rbase, rcnt) == 0) { 2802 /* give precedence to other error(s) */ 2803 if (exitval == EX_OK) 2804 exitval = EX_UNAVAILABLE; 2805 if (fo->first == fo->last) 2806 warnx("rule %u does not exist", fo->first); 2807 else 2808 warnx("no rules in range %u-%u", 2809 fo->first, fo->last); 2810 } 2811 } 2812 2813 if (co->do_dynamic && dynsz > 0) { 2814 printf("## Dynamic rules:\n"); 2815 for (lac = ac, lav = av; lac != 0; lac--) { 2816 fo->last = fo->first = strtoul(*lav++, &endptr, 10); 2817 if (*endptr == '-') 2818 fo->last = strtoul(endptr+1, &endptr, 10); 2819 if (*endptr) 2820 /* already warned */ 2821 continue; 2822 list_dyn_range(co, fo, &bp, dynbase, dynsz); 2823 } 2824 } 2825 2826 bp_free(&bp); 2827 return (exitval); 2828} 2829 2830 2831/* 2832 * Retrieves current ipfw configuration of given type 2833 * and stores its pointer to @pcfg. 2834 * 2835 * Caller is responsible for freeing @pcfg. 2836 * 2837 * Returns 0 on success. 2838 */ 2839 2840static int 2841ipfw_get_config(struct cmdline_opts *co, struct format_opts *fo, 2842 ipfw_cfg_lheader **pcfg, size_t *psize) 2843{ 2844 ipfw_cfg_lheader *cfg; 2845 size_t sz; 2846 int i; 2847 2848 2849 if (co->test_only != 0) { 2850 fprintf(stderr, "Testing only, list disabled\n"); 2851 return (0); 2852 } 2853 2854 /* Start with some data size */ 2855 sz = 4096; 2856 cfg = NULL; 2857 2858 for (i = 0; i < 16; i++) { 2859 if (cfg != NULL) 2860 free(cfg); 2861 if ((cfg = calloc(1, sz)) == NULL) 2862 return (ENOMEM); 2863 2864 cfg->flags = fo->flags; 2865 cfg->start_rule = fo->first; 2866 cfg->end_rule = fo->last; 2867 2868 if (do_get3(IP_FW_XGET, &cfg->opheader, &sz) != 0) { 2869 if (errno != ENOMEM) { 2870 free(cfg); 2871 return (errno); 2872 } 2873 2874 /* Buffer size is not enough. Try to increase */ 2875 sz = sz * 2; 2876 if (sz < cfg->size) 2877 sz = cfg->size; 2878 continue; 2879 } 2880 2881 *pcfg = cfg; 2882 *psize = sz; 2883 return (0); 2884 } 2885 2886 free(cfg); 2887 return (ENOMEM); 2888} 2889 2890static int 2891lookup_host (char *host, struct in_addr *ipaddr) 2892{ 2893 struct hostent *he; 2894 2895 if (!inet_aton(host, ipaddr)) { 2896 if ((he = gethostbyname(host)) == NULL) 2897 return(-1); 2898 *ipaddr = *(struct in_addr *)he->h_addr_list[0]; 2899 } 2900 return(0); 2901} 2902 2903struct tidx { 2904 ipfw_obj_ntlv *idx; 2905 uint32_t count; 2906 uint32_t size; 2907 uint16_t counter; 2908 uint8_t set; 2909}; 2910 2911int 2912ipfw_check_object_name(const char *name) 2913{ 2914 int c, i, l; 2915 2916 /* 2917 * Check that name is null-terminated and contains 2918 * valid symbols only. Valid mask is: 2919 * [a-zA-Z0-9\-_\.]{1,63} 2920 */ 2921 l = strlen(name); 2922 if (l == 0 || l >= 64) 2923 return (EINVAL); 2924 for (i = 0; i < l; i++) { 2925 c = name[i]; 2926 if (isalpha(c) || isdigit(c) || c == '_' || 2927 c == '-' || c == '.') 2928 continue; 2929 return (EINVAL); 2930 } 2931 return (0); 2932} 2933 2934static char *default_state_name = "default"; 2935static int 2936state_check_name(const char *name) 2937{ 2938 2939 if (ipfw_check_object_name(name) != 0) 2940 return (EINVAL); 2941 if (strcmp(name, "any") == 0) 2942 return (EINVAL); 2943 return (0); 2944} 2945 2946static int 2947eaction_check_name(const char *name) 2948{ 2949 2950 if (ipfw_check_object_name(name) != 0) 2951 return (EINVAL); 2952 /* Restrict some 'special' names */ 2953 if (match_token(rule_actions, name) != -1 && 2954 match_token(rule_action_params, name) != -1) 2955 return (EINVAL); 2956 return (0); 2957} 2958 2959static uint16_t 2960pack_object(struct tidx *tstate, char *name, int otype) 2961{ 2962 int i; 2963 ipfw_obj_ntlv *ntlv; 2964 2965 for (i = 0; i < tstate->count; i++) { 2966 if (strcmp(tstate->idx[i].name, name) != 0) 2967 continue; 2968 if (tstate->idx[i].set != tstate->set) 2969 continue; 2970 if (tstate->idx[i].head.type != otype) 2971 continue; 2972 2973 return (tstate->idx[i].idx); 2974 } 2975 2976 if (tstate->count + 1 > tstate->size) { 2977 tstate->size += 4; 2978 tstate->idx = realloc(tstate->idx, tstate->size * 2979 sizeof(ipfw_obj_ntlv)); 2980 if (tstate->idx == NULL) 2981 return (0); 2982 } 2983 2984 ntlv = &tstate->idx[i]; 2985 memset(ntlv, 0, sizeof(ipfw_obj_ntlv)); 2986 strlcpy(ntlv->name, name, sizeof(ntlv->name)); 2987 ntlv->head.type = otype; 2988 ntlv->head.length = sizeof(ipfw_obj_ntlv); 2989 ntlv->set = tstate->set; 2990 ntlv->idx = ++tstate->counter; 2991 tstate->count++; 2992 2993 return (ntlv->idx); 2994} 2995 2996static uint16_t 2997pack_table(struct tidx *tstate, char *name) 2998{ 2999 3000 if (table_check_name(name) != 0) 3001 return (0); 3002 3003 return (pack_object(tstate, name, IPFW_TLV_TBL_NAME)); 3004} 3005 3006void 3007fill_table(struct _ipfw_insn *cmd, char *av, uint8_t opcode, 3008 struct tidx *tstate) 3009{ 3010 uint32_t *d = ((ipfw_insn_u32 *)cmd)->d; 3011 uint16_t uidx; 3012 char *p; 3013 3014 if ((p = strchr(av + 6, ')')) == NULL) 3015 errx(EX_DATAERR, "forgotten parenthesis: '%s'", av); 3016 *p = '\0'; 3017 p = strchr(av + 6, ','); 3018 if (p) 3019 *p++ = '\0'; 3020 3021 if ((uidx = pack_table(tstate, av + 6)) == 0) 3022 errx(EX_DATAERR, "Invalid table name: %s", av + 6); 3023 3024 cmd->opcode = opcode; 3025 cmd->arg1 = uidx; 3026 if (p) { 3027 cmd->len |= F_INSN_SIZE(ipfw_insn_u32); 3028 d[0] = strtoul(p, NULL, 0); 3029 } else 3030 cmd->len |= F_INSN_SIZE(ipfw_insn); 3031} 3032 3033 3034/* 3035 * fills the addr and mask fields in the instruction as appropriate from av. 3036 * Update length as appropriate. 3037 * The following formats are allowed: 3038 * me returns O_IP_*_ME 3039 * 1.2.3.4 single IP address 3040 * 1.2.3.4:5.6.7.8 address:mask 3041 * 1.2.3.4/24 address/mask 3042 * 1.2.3.4/26{1,6,5,4,23} set of addresses in a subnet 3043 * We can have multiple comma-separated address/mask entries. 3044 */ 3045static void 3046fill_ip(ipfw_insn_ip *cmd, char *av, int cblen, struct tidx *tstate) 3047{ 3048 int len = 0; 3049 uint32_t *d = ((ipfw_insn_u32 *)cmd)->d; 3050 3051 cmd->o.len &= ~F_LEN_MASK; /* zero len */ 3052 3053 if (_substrcmp(av, "any") == 0) 3054 return; 3055 3056 if (_substrcmp(av, "me") == 0) { 3057 cmd->o.len |= F_INSN_SIZE(ipfw_insn); 3058 return; 3059 } 3060 3061 if (strncmp(av, "table(", 6) == 0) { 3062 fill_table(&cmd->o, av, O_IP_DST_LOOKUP, tstate); 3063 return; 3064 } 3065 3066 while (av) { 3067 /* 3068 * After the address we can have '/' or ':' indicating a mask, 3069 * ',' indicating another address follows, '{' indicating a 3070 * set of addresses of unspecified size. 3071 */ 3072 char *t = NULL, *p = strpbrk(av, "/:,{"); 3073 int masklen; 3074 char md, nd = '\0'; 3075 3076 CHECK_LENGTH(cblen, F_INSN_SIZE(ipfw_insn) + 2 + len); 3077 3078 if (p) { 3079 md = *p; 3080 *p++ = '\0'; 3081 if ((t = strpbrk(p, ",{")) != NULL) { 3082 nd = *t; 3083 *t = '\0'; 3084 } 3085 } else 3086 md = '\0'; 3087 3088 if (lookup_host(av, (struct in_addr *)&d[0]) != 0) 3089 errx(EX_NOHOST, "hostname ``%s'' unknown", av); 3090 switch (md) { 3091 case ':': 3092 if (!inet_aton(p, (struct in_addr *)&d[1])) 3093 errx(EX_DATAERR, "bad netmask ``%s''", p); 3094 break; 3095 case '/': 3096 masklen = atoi(p); 3097 if (masklen == 0) 3098 d[1] = htonl(0U); /* mask */ 3099 else if (masklen > 32) 3100 errx(EX_DATAERR, "bad width ``%s''", p); 3101 else 3102 d[1] = htonl(~0U << (32 - masklen)); 3103 break; 3104 case '{': /* no mask, assume /24 and put back the '{' */ 3105 d[1] = htonl(~0U << (32 - 24)); 3106 *(--p) = md; 3107 break; 3108 3109 case ',': /* single address plus continuation */ 3110 *(--p) = md; 3111 /* FALLTHROUGH */ 3112 case 0: /* initialization value */ 3113 default: 3114 d[1] = htonl(~0U); /* force /32 */ 3115 break; 3116 } 3117 d[0] &= d[1]; /* mask base address with mask */ 3118 if (t) 3119 *t = nd; 3120 /* find next separator */ 3121 if (p) 3122 p = strpbrk(p, ",{"); 3123 if (p && *p == '{') { 3124 /* 3125 * We have a set of addresses. They are stored as follows: 3126 * arg1 is the set size (powers of 2, 2..256) 3127 * addr is the base address IN HOST FORMAT 3128 * mask.. is an array of arg1 bits (rounded up to 3129 * the next multiple of 32) with bits set 3130 * for each host in the map. 3131 */ 3132 uint32_t *map = (uint32_t *)&cmd->mask; 3133 int low, high; 3134 int i = contigmask((uint8_t *)&(d[1]), 32); 3135 3136 if (len > 0) 3137 errx(EX_DATAERR, "address set cannot be in a list"); 3138 if (i < 24 || i > 31) 3139 errx(EX_DATAERR, "invalid set with mask %d\n", i); 3140 cmd->o.arg1 = 1<<(32-i); /* map length */ 3141 d[0] = ntohl(d[0]); /* base addr in host format */ 3142 cmd->o.opcode = O_IP_DST_SET; /* default */ 3143 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32) + (cmd->o.arg1+31)/32; 3144 for (i = 0; i < (cmd->o.arg1+31)/32 ; i++) 3145 map[i] = 0; /* clear map */ 3146 3147 av = p + 1; 3148 low = d[0] & 0xff; 3149 high = low + cmd->o.arg1 - 1; 3150 /* 3151 * Here, i stores the previous value when we specify a range 3152 * of addresses within a mask, e.g. 45-63. i = -1 means we 3153 * have no previous value. 3154 */ 3155 i = -1; /* previous value in a range */ 3156 while (isdigit(*av)) { 3157 char *s; 3158 int a = strtol(av, &s, 0); 3159 3160 if (s == av) { /* no parameter */ 3161 if (*av != '}') 3162 errx(EX_DATAERR, "set not closed\n"); 3163 if (i != -1) 3164 errx(EX_DATAERR, "incomplete range %d-", i); 3165 break; 3166 } 3167 if (a < low || a > high) 3168 errx(EX_DATAERR, "addr %d out of range [%d-%d]\n", 3169 a, low, high); 3170 a -= low; 3171 if (i == -1) /* no previous in range */ 3172 i = a; 3173 else { /* check that range is valid */ 3174 if (i > a) 3175 errx(EX_DATAERR, "invalid range %d-%d", 3176 i+low, a+low); 3177 if (*s == '-') 3178 errx(EX_DATAERR, "double '-' in range"); 3179 } 3180 for (; i <= a; i++) 3181 map[i/32] |= 1<<(i & 31); 3182 i = -1; 3183 if (*s == '-') 3184 i = a; 3185 else if (*s == '}') 3186 break; 3187 av = s+1; 3188 } 3189 return; 3190 } 3191 av = p; 3192 if (av) /* then *av must be a ',' */ 3193 av++; 3194 3195 /* Check this entry */ 3196 if (d[1] == 0) { /* "any", specified as x.x.x.x/0 */ 3197 /* 3198 * 'any' turns the entire list into a NOP. 3199 * 'not any' never matches, so it is removed from the 3200 * list unless it is the only item, in which case we 3201 * report an error. 3202 */ 3203 if (cmd->o.len & F_NOT) { /* "not any" never matches */ 3204 if (av == NULL && len == 0) /* only this entry */ 3205 errx(EX_DATAERR, "not any never matches"); 3206 } 3207 /* else do nothing and skip this entry */ 3208 return; 3209 } 3210 /* A single IP can be stored in an optimized format */ 3211 if (d[1] == (uint32_t)~0 && av == NULL && len == 0) { 3212 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32); 3213 return; 3214 } 3215 len += 2; /* two words... */ 3216 d += 2; 3217 } /* end while */ 3218 if (len + 1 > F_LEN_MASK) 3219 errx(EX_DATAERR, "address list too long"); 3220 cmd->o.len |= len+1; 3221} 3222 3223 3224/* n2mask sets n bits of the mask */ 3225void 3226n2mask(struct in6_addr *mask, int n) 3227{ 3228 static int minimask[9] = 3229 { 0x00, 0x80, 0xc0, 0xe0, 0xf0, 0xf8, 0xfc, 0xfe, 0xff }; 3230 u_char *p; 3231 3232 memset(mask, 0, sizeof(struct in6_addr)); 3233 p = (u_char *) mask; 3234 for (; n > 0; p++, n -= 8) { 3235 if (n >= 8) 3236 *p = 0xff; 3237 else 3238 *p = minimask[n]; 3239 } 3240 return; 3241} 3242 3243static void 3244fill_flags_cmd(ipfw_insn *cmd, enum ipfw_opcodes opcode, 3245 struct _s_x *flags, char *p) 3246{ 3247 char *e; 3248 uint32_t set = 0, clear = 0; 3249 3250 if (fill_flags(flags, p, &e, &set, &clear) != 0) 3251 errx(EX_DATAERR, "invalid flag %s", e); 3252 3253 cmd->opcode = opcode; 3254 cmd->len = (cmd->len & (F_NOT | F_OR)) | 1; 3255 cmd->arg1 = (set & 0xff) | ( (clear & 0xff) << 8); 3256} 3257 3258 3259void 3260ipfw_delete(char *av[]) 3261{ 3262 ipfw_range_tlv rt; 3263 char *sep; 3264 int i, j; 3265 int exitval = EX_OK; 3266 int do_set = 0; 3267 3268 av++; 3269 NEED1("missing rule specification"); 3270 if ( *av && _substrcmp(*av, "set") == 0) { 3271 /* Do not allow using the following syntax: 3272 * ipfw set N delete set M 3273 */ 3274 if (co.use_set) 3275 errx(EX_DATAERR, "invalid syntax"); 3276 do_set = 1; /* delete set */ 3277 av++; 3278 } 3279 3280 /* Rule number */ 3281 while (*av && isdigit(**av)) { 3282 i = strtol(*av, &sep, 10); 3283 j = i; 3284 if (*sep== '-') 3285 j = strtol(sep + 1, NULL, 10); 3286 av++; 3287 if (co.do_nat) { 3288 exitval = do_cmd(IP_FW_NAT_DEL, &i, sizeof i); 3289 if (exitval) { 3290 exitval = EX_UNAVAILABLE; 3291 if (co.do_quiet) 3292 continue; 3293 warn("nat %u not available", i); 3294 } 3295 } else if (co.do_pipe) { 3296 exitval = ipfw_delete_pipe(co.do_pipe, i); 3297 } else { 3298 memset(&rt, 0, sizeof(rt)); 3299 if (do_set != 0) { 3300 rt.set = i & 31; 3301 rt.flags = IPFW_RCFLAG_SET; 3302 } else { 3303 rt.start_rule = i & 0xffff; 3304 rt.end_rule = j & 0xffff; 3305 if (rt.start_rule == 0 && rt.end_rule == 0) 3306 rt.flags |= IPFW_RCFLAG_ALL; 3307 else 3308 rt.flags |= IPFW_RCFLAG_RANGE; 3309 if (co.use_set != 0) { 3310 rt.set = co.use_set - 1; 3311 rt.flags |= IPFW_RCFLAG_SET; 3312 } 3313 } 3314 i = do_range_cmd(IP_FW_XDEL, &rt); 3315 if (i != 0) { 3316 exitval = EX_UNAVAILABLE; 3317 if (co.do_quiet) 3318 continue; 3319 warn("rule %u: setsockopt(IP_FW_XDEL)", 3320 rt.start_rule); 3321 } else if (rt.new_set == 0 && do_set == 0) { 3322 exitval = EX_UNAVAILABLE; 3323 if (co.do_quiet) 3324 continue; 3325 if (rt.start_rule != rt.end_rule) 3326 warnx("no rules rules in %u-%u range", 3327 rt.start_rule, rt.end_rule); 3328 else 3329 warnx("rule %u not found", 3330 rt.start_rule); 3331 } 3332 } 3333 } 3334 if (exitval != EX_OK && co.do_force == 0) 3335 exit(exitval); 3336} 3337 3338 3339/* 3340 * fill the interface structure. We do not check the name as we can 3341 * create interfaces dynamically, so checking them at insert time 3342 * makes relatively little sense. 3343 * Interface names containing '*', '?', or '[' are assumed to be shell 3344 * patterns which match interfaces. 3345 */ 3346static void 3347fill_iface(ipfw_insn_if *cmd, char *arg, int cblen, struct tidx *tstate) 3348{ 3349 char *p; 3350 uint16_t uidx; 3351 3352 cmd->name[0] = '\0'; 3353 cmd->o.len |= F_INSN_SIZE(ipfw_insn_if); 3354 3355 CHECK_CMDLEN; 3356 3357 /* Parse the interface or address */ 3358 if (strcmp(arg, "any") == 0) 3359 cmd->o.len = 0; /* effectively ignore this command */ 3360 else if (strncmp(arg, "table(", 6) == 0) { 3361 if ((p = strchr(arg + 6, ')')) == NULL) 3362 errx(EX_DATAERR, "forgotten parenthesis: '%s'", arg); 3363 *p = '\0'; 3364 p = strchr(arg + 6, ','); 3365 if (p) 3366 *p++ = '\0'; 3367 if ((uidx = pack_table(tstate, arg + 6)) == 0) 3368 errx(EX_DATAERR, "Invalid table name: %s", arg + 6); 3369 3370 cmd->name[0] = '\1'; /* Special value indicating table */ 3371 cmd->p.kidx = uidx; 3372 } else if (!isdigit(*arg)) { 3373 strlcpy(cmd->name, arg, sizeof(cmd->name)); 3374 cmd->p.glob = strpbrk(arg, "*?[") != NULL ? 1 : 0; 3375 } else if (!inet_aton(arg, &cmd->p.ip)) 3376 errx(EX_DATAERR, "bad ip address ``%s''", arg); 3377} 3378 3379static void 3380get_mac_addr_mask(const char *p, uint8_t *addr, uint8_t *mask) 3381{ 3382 int i; 3383 size_t l; 3384 char *ap, *ptr, *optr; 3385 struct ether_addr *mac; 3386 const char *macset = "0123456789abcdefABCDEF:"; 3387 3388 if (strcmp(p, "any") == 0) { 3389 for (i = 0; i < ETHER_ADDR_LEN; i++) 3390 addr[i] = mask[i] = 0; 3391 return; 3392 } 3393 3394 optr = ptr = strdup(p); 3395 if ((ap = strsep(&ptr, "&/")) != NULL && *ap != 0) { 3396 l = strlen(ap); 3397 if (strspn(ap, macset) != l || (mac = ether_aton(ap)) == NULL) 3398 errx(EX_DATAERR, "Incorrect MAC address"); 3399 bcopy(mac, addr, ETHER_ADDR_LEN); 3400 } else 3401 errx(EX_DATAERR, "Incorrect MAC address"); 3402 3403 if (ptr != NULL) { /* we have mask? */ 3404 if (p[ptr - optr - 1] == '/') { /* mask len */ 3405 long ml = strtol(ptr, &ap, 10); 3406 if (*ap != 0 || ml > ETHER_ADDR_LEN * 8 || ml < 0) 3407 errx(EX_DATAERR, "Incorrect mask length"); 3408 for (i = 0; ml > 0 && i < ETHER_ADDR_LEN; ml -= 8, i++) 3409 mask[i] = (ml >= 8) ? 0xff: (~0) << (8 - ml); 3410 } else { /* mask */ 3411 l = strlen(ptr); 3412 if (strspn(ptr, macset) != l || 3413 (mac = ether_aton(ptr)) == NULL) 3414 errx(EX_DATAERR, "Incorrect mask"); 3415 bcopy(mac, mask, ETHER_ADDR_LEN); 3416 } 3417 } else { /* default mask: ff:ff:ff:ff:ff:ff */ 3418 for (i = 0; i < ETHER_ADDR_LEN; i++) 3419 mask[i] = 0xff; 3420 } 3421 for (i = 0; i < ETHER_ADDR_LEN; i++) 3422 addr[i] &= mask[i]; 3423 3424 free(optr); 3425} 3426 3427/* 3428 * helper function, updates the pointer to cmd with the length 3429 * of the current command, and also cleans up the first word of 3430 * the new command in case it has been clobbered before. 3431 */ 3432static ipfw_insn * 3433next_cmd(ipfw_insn *cmd, int *len) 3434{ 3435 *len -= F_LEN(cmd); 3436 CHECK_LENGTH(*len, 0); 3437 cmd += F_LEN(cmd); 3438 bzero(cmd, sizeof(*cmd)); 3439 return cmd; 3440} 3441 3442/* 3443 * Takes arguments and copies them into a comment 3444 */ 3445static void 3446fill_comment(ipfw_insn *cmd, char **av, int cblen) 3447{ 3448 int i, l; 3449 char *p = (char *)(cmd + 1); 3450 3451 cmd->opcode = O_NOP; 3452 cmd->len = (cmd->len & (F_NOT | F_OR)); 3453 3454 /* Compute length of comment string. */ 3455 for (i = 0, l = 0; av[i] != NULL; i++) 3456 l += strlen(av[i]) + 1; 3457 if (l == 0) 3458 return; 3459 if (l > 84) 3460 errx(EX_DATAERR, 3461 "comment too long (max 80 chars)"); 3462 l = 1 + (l+3)/4; 3463 cmd->len = (cmd->len & (F_NOT | F_OR)) | l; 3464 CHECK_CMDLEN; 3465 3466 for (i = 0; av[i] != NULL; i++) { 3467 strcpy(p, av[i]); 3468 p += strlen(av[i]); 3469 *p++ = ' '; 3470 } 3471 *(--p) = '\0'; 3472} 3473 3474/* 3475 * A function to fill simple commands of size 1. 3476 * Existing flags are preserved. 3477 */ 3478static void 3479fill_cmd(ipfw_insn *cmd, enum ipfw_opcodes opcode, int flags, uint16_t arg) 3480{ 3481 cmd->opcode = opcode; 3482 cmd->len = ((cmd->len | flags) & (F_NOT | F_OR)) | 1; 3483 cmd->arg1 = arg; 3484} 3485 3486/* 3487 * Fetch and add the MAC address and type, with masks. This generates one or 3488 * two microinstructions, and returns the pointer to the last one. 3489 */ 3490static ipfw_insn * 3491add_mac(ipfw_insn *cmd, char *av[], int cblen) 3492{ 3493 ipfw_insn_mac *mac; 3494 3495 if ( ( av[0] == NULL ) || ( av[1] == NULL ) ) 3496 errx(EX_DATAERR, "MAC dst src"); 3497 3498 cmd->opcode = O_MACADDR2; 3499 cmd->len = (cmd->len & (F_NOT | F_OR)) | F_INSN_SIZE(ipfw_insn_mac); 3500 CHECK_CMDLEN; 3501 3502 mac = (ipfw_insn_mac *)cmd; 3503 get_mac_addr_mask(av[0], mac->addr, mac->mask); /* dst */ 3504 get_mac_addr_mask(av[1], &(mac->addr[ETHER_ADDR_LEN]), 3505 &(mac->mask[ETHER_ADDR_LEN])); /* src */ 3506 return cmd; 3507} 3508 3509static ipfw_insn * 3510add_mactype(ipfw_insn *cmd, char *av, int cblen) 3511{ 3512 if (!av) 3513 errx(EX_DATAERR, "missing MAC type"); 3514 if (strcmp(av, "any") != 0) { /* we have a non-null type */ 3515 fill_newports((ipfw_insn_u16 *)cmd, av, IPPROTO_ETHERTYPE, 3516 cblen); 3517 cmd->opcode = O_MAC_TYPE; 3518 return cmd; 3519 } else 3520 return NULL; 3521} 3522 3523static ipfw_insn * 3524add_proto0(ipfw_insn *cmd, char *av, u_char *protop) 3525{ 3526 struct protoent *pe; 3527 char *ep; 3528 int proto; 3529 3530 proto = strtol(av, &ep, 10); 3531 if (*ep != '\0' || proto <= 0) { 3532 if ((pe = getprotobyname(av)) == NULL) 3533 return NULL; 3534 proto = pe->p_proto; 3535 } 3536 3537 fill_cmd(cmd, O_PROTO, 0, proto); 3538 *protop = proto; 3539 return cmd; 3540} 3541 3542static ipfw_insn * 3543add_proto(ipfw_insn *cmd, char *av, u_char *protop) 3544{ 3545 u_char proto = IPPROTO_IP; 3546 3547 if (_substrcmp(av, "all") == 0 || strcmp(av, "ip") == 0) 3548 ; /* do not set O_IP4 nor O_IP6 */ 3549 else if (strcmp(av, "ip4") == 0) 3550 /* explicit "just IPv4" rule */ 3551 fill_cmd(cmd, O_IP4, 0, 0); 3552 else if (strcmp(av, "ip6") == 0) { 3553 /* explicit "just IPv6" rule */ 3554 proto = IPPROTO_IPV6; 3555 fill_cmd(cmd, O_IP6, 0, 0); 3556 } else 3557 return add_proto0(cmd, av, protop); 3558 3559 *protop = proto; 3560 return cmd; 3561} 3562 3563static ipfw_insn * 3564add_proto_compat(ipfw_insn *cmd, char *av, u_char *protop) 3565{ 3566 u_char proto = IPPROTO_IP; 3567 3568 if (_substrcmp(av, "all") == 0 || strcmp(av, "ip") == 0) 3569 ; /* do not set O_IP4 nor O_IP6 */ 3570 else if (strcmp(av, "ipv4") == 0 || strcmp(av, "ip4") == 0) 3571 /* explicit "just IPv4" rule */ 3572 fill_cmd(cmd, O_IP4, 0, 0); 3573 else if (strcmp(av, "ipv6") == 0 || strcmp(av, "ip6") == 0) { 3574 /* explicit "just IPv6" rule */ 3575 proto = IPPROTO_IPV6; 3576 fill_cmd(cmd, O_IP6, 0, 0); 3577 } else 3578 return add_proto0(cmd, av, protop); 3579 3580 *protop = proto; 3581 return cmd; 3582} 3583 3584static ipfw_insn * 3585add_srcip(ipfw_insn *cmd, char *av, int cblen, struct tidx *tstate) 3586{ 3587 fill_ip((ipfw_insn_ip *)cmd, av, cblen, tstate); 3588 if (cmd->opcode == O_IP_DST_SET) /* set */ 3589 cmd->opcode = O_IP_SRC_SET; 3590 else if (cmd->opcode == O_IP_DST_LOOKUP) /* table */ 3591 cmd->opcode = O_IP_SRC_LOOKUP; 3592 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn)) /* me */ 3593 cmd->opcode = O_IP_SRC_ME; 3594 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_u32)) /* one IP */ 3595 cmd->opcode = O_IP_SRC; 3596 else /* addr/mask */ 3597 cmd->opcode = O_IP_SRC_MASK; 3598 return cmd; 3599} 3600 3601static ipfw_insn * 3602add_dstip(ipfw_insn *cmd, char *av, int cblen, struct tidx *tstate) 3603{ 3604 fill_ip((ipfw_insn_ip *)cmd, av, cblen, tstate); 3605 if (cmd->opcode == O_IP_DST_SET) /* set */ 3606 ; 3607 else if (cmd->opcode == O_IP_DST_LOOKUP) /* table */ 3608 ; 3609 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn)) /* me */ 3610 cmd->opcode = O_IP_DST_ME; 3611 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_u32)) /* one IP */ 3612 cmd->opcode = O_IP_DST; 3613 else /* addr/mask */ 3614 cmd->opcode = O_IP_DST_MASK; 3615 return cmd; 3616} 3617 3618static struct _s_x f_reserved_keywords[] = { 3619 { "altq", TOK_OR }, 3620 { "//", TOK_OR }, 3621 { "diverted", TOK_OR }, 3622 { "dst-port", TOK_OR }, 3623 { "src-port", TOK_OR }, 3624 { "established", TOK_OR }, 3625 { "keep-state", TOK_OR }, 3626 { "frag", TOK_OR }, 3627 { "icmptypes", TOK_OR }, 3628 { "in", TOK_OR }, 3629 { "out", TOK_OR }, 3630 { "ip6", TOK_OR }, 3631 { "any", TOK_OR }, 3632 { "to", TOK_OR }, 3633 { "via", TOK_OR }, 3634 { "{", TOK_OR }, 3635 { NULL, 0 } /* terminator */ 3636}; 3637 3638static ipfw_insn * 3639add_ports(ipfw_insn *cmd, char *av, u_char proto, int opcode, int cblen) 3640{ 3641 3642 if (match_token(f_reserved_keywords, av) != -1) 3643 return (NULL); 3644 3645 if (fill_newports((ipfw_insn_u16 *)cmd, av, proto, cblen)) { 3646 /* XXX todo: check that we have a protocol with ports */ 3647 cmd->opcode = opcode; 3648 return cmd; 3649 } 3650 return NULL; 3651} 3652 3653static ipfw_insn * 3654add_src(ipfw_insn *cmd, char *av, u_char proto, int cblen, struct tidx *tstate) 3655{ 3656 struct in6_addr a; 3657 char *host, *ch, buf[INET6_ADDRSTRLEN]; 3658 ipfw_insn *ret = NULL; 3659 int len; 3660 3661 /* Copy first address in set if needed */ 3662 if ((ch = strpbrk(av, "/,")) != NULL) { 3663 len = ch - av; 3664 strlcpy(buf, av, sizeof(buf)); 3665 if (len < sizeof(buf)) 3666 buf[len] = '\0'; 3667 host = buf; 3668 } else 3669 host = av; 3670 3671 if (proto == IPPROTO_IPV6 || strcmp(av, "me6") == 0 || 3672 inet_pton(AF_INET6, host, &a) == 1) 3673 ret = add_srcip6(cmd, av, cblen, tstate); 3674 /* XXX: should check for IPv4, not !IPv6 */ 3675 if (ret == NULL && (proto == IPPROTO_IP || strcmp(av, "me") == 0 || 3676 inet_pton(AF_INET6, host, &a) != 1)) 3677 ret = add_srcip(cmd, av, cblen, tstate); 3678 if (ret == NULL && strcmp(av, "any") != 0) 3679 ret = cmd; 3680 3681 return ret; 3682} 3683 3684static ipfw_insn * 3685add_dst(ipfw_insn *cmd, char *av, u_char proto, int cblen, struct tidx *tstate) 3686{ 3687 struct in6_addr a; 3688 char *host, *ch, buf[INET6_ADDRSTRLEN]; 3689 ipfw_insn *ret = NULL; 3690 int len; 3691 3692 /* Copy first address in set if needed */ 3693 if ((ch = strpbrk(av, "/,")) != NULL) { 3694 len = ch - av; 3695 strlcpy(buf, av, sizeof(buf)); 3696 if (len < sizeof(buf)) 3697 buf[len] = '\0'; 3698 host = buf; 3699 } else 3700 host = av; 3701 3702 if (proto == IPPROTO_IPV6 || strcmp(av, "me6") == 0 || 3703 inet_pton(AF_INET6, host, &a) == 1) 3704 ret = add_dstip6(cmd, av, cblen, tstate); 3705 /* XXX: should check for IPv4, not !IPv6 */ 3706 if (ret == NULL && (proto == IPPROTO_IP || strcmp(av, "me") == 0 || 3707 inet_pton(AF_INET6, host, &a) != 1)) 3708 ret = add_dstip(cmd, av, cblen, tstate); 3709 if (ret == NULL && strcmp(av, "any") != 0) 3710 ret = cmd; 3711 3712 return ret; 3713} 3714 3715/* 3716 * Parse arguments and assemble the microinstructions which make up a rule. 3717 * Rules are added into the 'rulebuf' and then copied in the correct order 3718 * into the actual rule. 3719 * 3720 * The syntax for a rule starts with the action, followed by 3721 * optional action parameters, and the various match patterns. 3722 * In the assembled microcode, the first opcode must be an O_PROBE_STATE 3723 * (generated if the rule includes a keep-state option), then the 3724 * various match patterns, log/altq actions, and the actual action. 3725 * 3726 */ 3727void 3728compile_rule(char *av[], uint32_t *rbuf, int *rbufsize, struct tidx *tstate) 3729{ 3730 /* 3731 * rules are added into the 'rulebuf' and then copied in 3732 * the correct order into the actual rule. 3733 * Some things that need to go out of order (prob, action etc.) 3734 * go into actbuf[]. 3735 */ 3736 static uint32_t actbuf[255], cmdbuf[255]; 3737 int rblen, ablen, cblen; 3738 3739 ipfw_insn *src, *dst, *cmd, *action, *prev=NULL; 3740 ipfw_insn *first_cmd; /* first match pattern */ 3741 3742 struct ip_fw_rule *rule; 3743 3744 /* 3745 * various flags used to record that we entered some fields. 3746 */ 3747 ipfw_insn *have_state = NULL; /* any state-related option */ 3748 int have_rstate = 0; 3749 ipfw_insn *have_log = NULL, *have_altq = NULL, *have_tag = NULL; 3750 ipfw_insn *have_skipcmd = NULL; 3751 size_t len; 3752 3753 int i; 3754 3755 int open_par = 0; /* open parenthesis ( */ 3756 3757 /* proto is here because it is used to fetch ports */ 3758 u_char proto = IPPROTO_IP; /* default protocol */ 3759 3760 double match_prob = 1; /* match probability, default is always match */ 3761 3762 bzero(actbuf, sizeof(actbuf)); /* actions go here */ 3763 bzero(cmdbuf, sizeof(cmdbuf)); 3764 bzero(rbuf, *rbufsize); 3765 3766 rule = (struct ip_fw_rule *)rbuf; 3767 cmd = (ipfw_insn *)cmdbuf; 3768 action = (ipfw_insn *)actbuf; 3769 3770 rblen = *rbufsize / sizeof(uint32_t); 3771 rblen -= sizeof(struct ip_fw_rule) / sizeof(uint32_t); 3772 ablen = sizeof(actbuf) / sizeof(actbuf[0]); 3773 cblen = sizeof(cmdbuf) / sizeof(cmdbuf[0]); 3774 cblen -= F_INSN_SIZE(ipfw_insn_u32) + 1; 3775 3776#define CHECK_RBUFLEN(len) { CHECK_LENGTH(rblen, len); rblen -= len; } 3777#define CHECK_ACTLEN CHECK_LENGTH(ablen, action->len) 3778 3779 av++; 3780 3781 /* [rule N] -- Rule number optional */ 3782 if (av[0] && isdigit(**av)) { 3783 rule->rulenum = atoi(*av); 3784 av++; 3785 } 3786 3787 /* [set N] -- set number (0..RESVD_SET), optional */ 3788 if (av[0] && av[1] && _substrcmp(*av, "set") == 0) { 3789 int set = strtoul(av[1], NULL, 10); 3790 if (set < 0 || set > RESVD_SET) 3791 errx(EX_DATAERR, "illegal set %s", av[1]); 3792 rule->set = set; 3793 tstate->set = set; 3794 av += 2; 3795 } 3796 3797 /* [prob D] -- match probability, optional */ 3798 if (av[0] && av[1] && _substrcmp(*av, "prob") == 0) { 3799 match_prob = strtod(av[1], NULL); 3800 3801 if (match_prob <= 0 || match_prob > 1) 3802 errx(EX_DATAERR, "illegal match prob. %s", av[1]); 3803 av += 2; 3804 } 3805 3806 /* action -- mandatory */ 3807 NEED1("missing action"); 3808 i = match_token(rule_actions, *av); 3809 av++; 3810 action->len = 1; /* default */ 3811 CHECK_ACTLEN; 3812 switch(i) { 3813 case TOK_CHECKSTATE: 3814 have_state = action; 3815 action->opcode = O_CHECK_STATE; 3816 if (*av == NULL || 3817 match_token(rule_options, *av) == TOK_COMMENT) { 3818 action->arg1 = pack_object(tstate, 3819 default_state_name, IPFW_TLV_STATE_NAME); 3820 break; 3821 } 3822 if (*av[0] == ':') { 3823 if (strcmp(*av + 1, "any") == 0) 3824 action->arg1 = 0; 3825 else if (state_check_name(*av + 1) == 0) 3826 action->arg1 = pack_object(tstate, *av + 1, 3827 IPFW_TLV_STATE_NAME); 3828 else 3829 errx(EX_DATAERR, "Invalid state name %s", 3830 *av); 3831 av++; 3832 break; 3833 } 3834 errx(EX_DATAERR, "Invalid state name %s", *av); 3835 break; 3836 3837 case TOK_ABORT: 3838 action->opcode = O_REJECT; 3839 action->arg1 = ICMP_REJECT_ABORT; 3840 break; 3841 3842 case TOK_ABORT6: 3843 action->opcode = O_UNREACH6; 3844 action->arg1 = ICMP6_UNREACH_ABORT; 3845 break; 3846 3847 case TOK_ACCEPT: 3848 action->opcode = O_ACCEPT; 3849 break; 3850 3851 case TOK_DENY: 3852 action->opcode = O_DENY; 3853 action->arg1 = 0; 3854 break; 3855 3856 case TOK_REJECT: 3857 action->opcode = O_REJECT; 3858 action->arg1 = ICMP_UNREACH_HOST; 3859 break; 3860 3861 case TOK_RESET: 3862 action->opcode = O_REJECT; 3863 action->arg1 = ICMP_REJECT_RST; 3864 break; 3865 3866 case TOK_RESET6: 3867 action->opcode = O_UNREACH6; 3868 action->arg1 = ICMP6_UNREACH_RST; 3869 break; 3870 3871 case TOK_UNREACH: 3872 action->opcode = O_REJECT; 3873 NEED1("missing reject code"); 3874 fill_reject_code(&action->arg1, *av); 3875 av++; 3876 break; 3877 3878 case TOK_UNREACH6: 3879 action->opcode = O_UNREACH6; 3880 NEED1("missing unreach code"); 3881 fill_unreach6_code(&action->arg1, *av); 3882 av++; 3883 break; 3884 3885 case TOK_COUNT: 3886 action->opcode = O_COUNT; 3887 break; 3888 3889 case TOK_NAT: 3890 action->opcode = O_NAT; 3891 action->len = F_INSN_SIZE(ipfw_insn_nat); 3892 CHECK_ACTLEN; 3893 if (*av != NULL && _substrcmp(*av, "global") == 0) { 3894 action->arg1 = IP_FW_NAT44_GLOBAL; 3895 av++; 3896 break; 3897 } else 3898 goto chkarg; 3899 case TOK_QUEUE: 3900 action->opcode = O_QUEUE; 3901 goto chkarg; 3902 case TOK_PIPE: 3903 action->opcode = O_PIPE; 3904 goto chkarg; 3905 case TOK_SKIPTO: 3906 action->opcode = O_SKIPTO; 3907 goto chkarg; 3908 case TOK_NETGRAPH: 3909 action->opcode = O_NETGRAPH; 3910 goto chkarg; 3911 case TOK_NGTEE: 3912 action->opcode = O_NGTEE; 3913 goto chkarg; 3914 case TOK_DIVERT: 3915 action->opcode = O_DIVERT; 3916 goto chkarg; 3917 case TOK_TEE: 3918 action->opcode = O_TEE; 3919 goto chkarg; 3920 case TOK_CALL: 3921 action->opcode = O_CALLRETURN; 3922chkarg: 3923 if (!av[0]) 3924 errx(EX_USAGE, "missing argument for %s", *(av - 1)); 3925 if (isdigit(**av)) { 3926 action->arg1 = strtoul(*av, NULL, 10); 3927 if (action->arg1 <= 0 || action->arg1 >= IP_FW_TABLEARG) 3928 errx(EX_DATAERR, "illegal argument for %s", 3929 *(av - 1)); 3930 } else if (_substrcmp(*av, "tablearg") == 0) { 3931 action->arg1 = IP_FW_TARG; 3932 } else if (i == TOK_DIVERT || i == TOK_TEE) { 3933 struct servent *s; 3934 setservent(1); 3935 s = getservbyname(av[0], "divert"); 3936 if (s != NULL) 3937 action->arg1 = ntohs(s->s_port); 3938 else 3939 errx(EX_DATAERR, "illegal divert/tee port"); 3940 } else 3941 errx(EX_DATAERR, "illegal argument for %s", *(av - 1)); 3942 av++; 3943 break; 3944 3945 case TOK_FORWARD: { 3946 /* 3947 * Locate the address-port separator (':' or ','). 3948 * Could be one of the following: 3949 * hostname:port 3950 * IPv4 a.b.c.d,port 3951 * IPv4 a.b.c.d:port 3952 * IPv6 w:x:y::z,port 3953 * The ':' can only be used with hostname and IPv4 address. 3954 * XXX-BZ Should we also support [w:x:y::z]:port? 3955 */ 3956 struct sockaddr_storage result; 3957 struct addrinfo *res; 3958 char *s, *end; 3959 int family; 3960 u_short port_number; 3961 3962 NEED1("missing forward address[:port]"); 3963 3964 /* 3965 * locate the address-port separator (':' or ',') 3966 */ 3967 s = strchr(*av, ','); 3968 if (s == NULL) { 3969 /* Distinguish between IPv4:port and IPv6 cases. */ 3970 s = strchr(*av, ':'); 3971 if (s && strchr(s+1, ':')) 3972 s = NULL; /* no port */ 3973 } 3974 3975 port_number = 0; 3976 if (s != NULL) { 3977 /* Terminate host portion and set s to start of port. */ 3978 *(s++) = '\0'; 3979 i = strtoport(s, &end, 0 /* base */, 0 /* proto */); 3980 if (s == end) 3981 errx(EX_DATAERR, 3982 "illegal forwarding port ``%s''", s); 3983 port_number = (u_short)i; 3984 } 3985 3986 if (_substrcmp(*av, "tablearg") == 0) { 3987 family = PF_INET; 3988 ((struct sockaddr_in*)&result)->sin_addr.s_addr = 3989 INADDR_ANY; 3990 } else { 3991 /* 3992 * Resolve the host name or address to a family and a 3993 * network representation of the address. 3994 */ 3995 if (getaddrinfo(*av, NULL, NULL, &res)) 3996 errx(EX_DATAERR, NULL); 3997 /* Just use the first host in the answer. */ 3998 family = res->ai_family; 3999 memcpy(&result, res->ai_addr, res->ai_addrlen); 4000 freeaddrinfo(res); 4001 } 4002 4003 if (family == PF_INET) { 4004 ipfw_insn_sa *p = (ipfw_insn_sa *)action; 4005 4006 action->opcode = O_FORWARD_IP; 4007 action->len = F_INSN_SIZE(ipfw_insn_sa); 4008 CHECK_ACTLEN; 4009 4010 /* 4011 * In the kernel we assume AF_INET and use only 4012 * sin_port and sin_addr. Remember to set sin_len as 4013 * the routing code seems to use it too. 4014 */ 4015 p->sa.sin_len = sizeof(struct sockaddr_in); 4016 p->sa.sin_family = AF_INET; 4017 p->sa.sin_port = port_number; 4018 p->sa.sin_addr.s_addr = 4019 ((struct sockaddr_in *)&result)->sin_addr.s_addr; 4020 } else if (family == PF_INET6) { 4021 ipfw_insn_sa6 *p = (ipfw_insn_sa6 *)action; 4022 4023 action->opcode = O_FORWARD_IP6; 4024 action->len = F_INSN_SIZE(ipfw_insn_sa6); 4025 CHECK_ACTLEN; 4026 4027 p->sa.sin6_len = sizeof(struct sockaddr_in6); 4028 p->sa.sin6_family = AF_INET6; 4029 p->sa.sin6_port = port_number; 4030 p->sa.sin6_flowinfo = 0; 4031 p->sa.sin6_scope_id = 4032 ((struct sockaddr_in6 *)&result)->sin6_scope_id; 4033 bcopy(&((struct sockaddr_in6*)&result)->sin6_addr, 4034 &p->sa.sin6_addr, sizeof(p->sa.sin6_addr)); 4035 } else { 4036 errx(EX_DATAERR, "Invalid address family in forward action"); 4037 } 4038 av++; 4039 break; 4040 } 4041 case TOK_COMMENT: 4042 /* pretend it is a 'count' rule followed by the comment */ 4043 action->opcode = O_COUNT; 4044 av--; /* go back... */ 4045 break; 4046 4047 case TOK_SETFIB: 4048 { 4049 int numfibs; 4050 size_t intsize = sizeof(int); 4051 4052 action->opcode = O_SETFIB; 4053 NEED1("missing fib number"); 4054 if (_substrcmp(*av, "tablearg") == 0) { 4055 action->arg1 = IP_FW_TARG; 4056 } else { 4057 action->arg1 = strtoul(*av, NULL, 10); 4058 if (sysctlbyname("net.fibs", &numfibs, &intsize, 4059 NULL, 0) == -1) 4060 errx(EX_DATAERR, "fibs not suported.\n"); 4061 if (action->arg1 >= numfibs) /* Temporary */ 4062 errx(EX_DATAERR, "fib too large.\n"); 4063 /* Add high-order bit to fib to make room for tablearg*/ 4064 action->arg1 |= 0x8000; 4065 } 4066 av++; 4067 break; 4068 } 4069 4070 case TOK_SETDSCP: 4071 { 4072 int code; 4073 4074 action->opcode = O_SETDSCP; 4075 NEED1("missing DSCP code"); 4076 if (_substrcmp(*av, "tablearg") == 0) { 4077 action->arg1 = IP_FW_TARG; 4078 } else { 4079 if (isalpha(*av[0])) { 4080 if ((code = match_token(f_ipdscp, *av)) == -1) 4081 errx(EX_DATAERR, "Unknown DSCP code"); 4082 action->arg1 = code; 4083 } else 4084 action->arg1 = strtoul(*av, NULL, 10); 4085 /* 4086 * Add high-order bit to DSCP to make room 4087 * for tablearg 4088 */ 4089 action->arg1 |= 0x8000; 4090 } 4091 av++; 4092 break; 4093 } 4094 4095 case TOK_REASS: 4096 action->opcode = O_REASS; 4097 break; 4098 4099 case TOK_RETURN: 4100 fill_cmd(action, O_CALLRETURN, F_NOT, 0); 4101 break; 4102 4103 case TOK_TCPSETMSS: { 4104 u_long mss; 4105 uint16_t idx; 4106 4107 idx = pack_object(tstate, "tcp-setmss", IPFW_TLV_EACTION); 4108 if (idx == 0) 4109 errx(EX_DATAERR, "pack_object failed"); 4110 fill_cmd(action, O_EXTERNAL_ACTION, 0, idx); 4111 NEED1("Missing MSS value"); 4112 action = next_cmd(action, &ablen); 4113 action->len = 1; 4114 CHECK_ACTLEN; 4115 mss = strtoul(*av, NULL, 10); 4116 if (mss == 0 || mss > UINT16_MAX) 4117 errx(EX_USAGE, "invalid MSS value %s", *av); 4118 fill_cmd(action, O_EXTERNAL_DATA, 0, (uint16_t)mss); 4119 av++; 4120 break; 4121 } 4122 4123 default: 4124 av--; 4125 if (match_token(rule_eactions, *av) == -1) 4126 errx(EX_DATAERR, "invalid action %s\n", *av); 4127 /* 4128 * External actions support. 4129 * XXX: we support only syntax with instance name. 4130 * For known external actions (from rule_eactions list) 4131 * we can handle syntax directly. But with `eaction' 4132 * keyword we can use only `eaction <name> <instance>' 4133 * syntax. 4134 */ 4135 case TOK_EACTION: { 4136 uint16_t idx; 4137 4138 NEED1("Missing eaction name"); 4139 if (eaction_check_name(*av) != 0) 4140 errx(EX_DATAERR, "Invalid eaction name %s", *av); 4141 idx = pack_object(tstate, *av, IPFW_TLV_EACTION); 4142 if (idx == 0) 4143 errx(EX_DATAERR, "pack_object failed"); 4144 fill_cmd(action, O_EXTERNAL_ACTION, 0, idx); 4145 av++; 4146 NEED1("Missing eaction instance name"); 4147 action = next_cmd(action, &ablen); 4148 action->len = 1; 4149 CHECK_ACTLEN; 4150 if (eaction_check_name(*av) != 0) 4151 errx(EX_DATAERR, "Invalid eaction instance name %s", 4152 *av); 4153 /* 4154 * External action instance object has TLV type depended 4155 * from the external action name object index. Since we 4156 * currently don't know this index, use zero as TLV type. 4157 */ 4158 idx = pack_object(tstate, *av, 0); 4159 if (idx == 0) 4160 errx(EX_DATAERR, "pack_object failed"); 4161 fill_cmd(action, O_EXTERNAL_INSTANCE, 0, idx); 4162 av++; 4163 } 4164 } 4165 action = next_cmd(action, &ablen); 4166 4167 /* 4168 * [altq queuename] -- altq tag, optional 4169 * [log [logamount N]] -- log, optional 4170 * 4171 * If they exist, it go first in the cmdbuf, but then it is 4172 * skipped in the copy section to the end of the buffer. 4173 */ 4174 while (av[0] != NULL && (i = match_token(rule_action_params, *av)) != -1) { 4175 av++; 4176 switch (i) { 4177 case TOK_LOG: 4178 { 4179 ipfw_insn_log *c = (ipfw_insn_log *)cmd; 4180 int l; 4181 4182 if (have_log) 4183 errx(EX_DATAERR, 4184 "log cannot be specified more than once"); 4185 have_log = (ipfw_insn *)c; 4186 cmd->len = F_INSN_SIZE(ipfw_insn_log); 4187 CHECK_CMDLEN; 4188 cmd->opcode = O_LOG; 4189 if (av[0] && _substrcmp(*av, "logamount") == 0) { 4190 av++; 4191 NEED1("logamount requires argument"); 4192 l = atoi(*av); 4193 if (l < 0) 4194 errx(EX_DATAERR, 4195 "logamount must be positive"); 4196 c->max_log = l; 4197 av++; 4198 } else { 4199 len = sizeof(c->max_log); 4200 if (sysctlbyname("net.inet.ip.fw.verbose_limit", 4201 &c->max_log, &len, NULL, 0) == -1) { 4202 if (co.test_only) { 4203 c->max_log = 0; 4204 break; 4205 } 4206 errx(1, "sysctlbyname(\"%s\")", 4207 "net.inet.ip.fw.verbose_limit"); 4208 } 4209 } 4210 } 4211 break; 4212 4213#ifndef NO_ALTQ 4214 case TOK_ALTQ: 4215 { 4216 ipfw_insn_altq *a = (ipfw_insn_altq *)cmd; 4217 4218 NEED1("missing altq queue name"); 4219 if (have_altq) 4220 errx(EX_DATAERR, 4221 "altq cannot be specified more than once"); 4222 have_altq = (ipfw_insn *)a; 4223 cmd->len = F_INSN_SIZE(ipfw_insn_altq); 4224 CHECK_CMDLEN; 4225 cmd->opcode = O_ALTQ; 4226 a->qid = altq_name_to_qid(*av); 4227 av++; 4228 } 4229 break; 4230#endif 4231 4232 case TOK_TAG: 4233 case TOK_UNTAG: { 4234 uint16_t tag; 4235 4236 if (have_tag) 4237 errx(EX_USAGE, "tag and untag cannot be " 4238 "specified more than once"); 4239 GET_UINT_ARG(tag, IPFW_ARG_MIN, IPFW_ARG_MAX, i, 4240 rule_action_params); 4241 have_tag = cmd; 4242 fill_cmd(cmd, O_TAG, (i == TOK_TAG) ? 0: F_NOT, tag); 4243 av++; 4244 break; 4245 } 4246 4247 default: 4248 abort(); 4249 } 4250 cmd = next_cmd(cmd, &cblen); 4251 } 4252 4253 if (have_state) { /* must be a check-state, we are done */ 4254 if (*av != NULL && 4255 match_token(rule_options, *av) == TOK_COMMENT) { 4256 /* check-state has a comment */ 4257 av++; 4258 fill_comment(cmd, av, cblen); 4259 cmd = next_cmd(cmd, &cblen); 4260 av[0] = NULL; 4261 } 4262 goto done; 4263 } 4264 4265#define OR_START(target) \ 4266 if (av[0] && (*av[0] == '(' || *av[0] == '{')) { \ 4267 if (open_par) \ 4268 errx(EX_USAGE, "nested \"(\" not allowed\n"); \ 4269 prev = NULL; \ 4270 open_par = 1; \ 4271 if ( (av[0])[1] == '\0') { \ 4272 av++; \ 4273 } else \ 4274 (*av)++; \ 4275 } \ 4276 target: \ 4277 4278 4279#define CLOSE_PAR \ 4280 if (open_par) { \ 4281 if (av[0] && ( \ 4282 strcmp(*av, ")") == 0 || \ 4283 strcmp(*av, "}") == 0)) { \ 4284 prev = NULL; \ 4285 open_par = 0; \ 4286 av++; \ 4287 } else \ 4288 errx(EX_USAGE, "missing \")\"\n"); \ 4289 } 4290 4291#define NOT_BLOCK \ 4292 if (av[0] && _substrcmp(*av, "not") == 0) { \ 4293 if (cmd->len & F_NOT) \ 4294 errx(EX_USAGE, "double \"not\" not allowed\n"); \ 4295 cmd->len |= F_NOT; \ 4296 av++; \ 4297 } 4298 4299#define OR_BLOCK(target) \ 4300 if (av[0] && _substrcmp(*av, "or") == 0) { \ 4301 if (prev == NULL || open_par == 0) \ 4302 errx(EX_DATAERR, "invalid OR block"); \ 4303 prev->len |= F_OR; \ 4304 av++; \ 4305 goto target; \ 4306 } \ 4307 CLOSE_PAR; 4308 4309 first_cmd = cmd; 4310 4311#if 0 4312 /* 4313 * MAC addresses, optional. 4314 * If we have this, we skip the part "proto from src to dst" 4315 * and jump straight to the option parsing. 4316 */ 4317 NOT_BLOCK; 4318 NEED1("missing protocol"); 4319 if (_substrcmp(*av, "MAC") == 0 || 4320 _substrcmp(*av, "mac") == 0) { 4321 av++; /* the "MAC" keyword */ 4322 add_mac(cmd, av); /* exits in case of errors */ 4323 cmd = next_cmd(cmd); 4324 av += 2; /* dst-mac and src-mac */ 4325 NOT_BLOCK; 4326 NEED1("missing mac type"); 4327 if (add_mactype(cmd, av[0])) 4328 cmd = next_cmd(cmd); 4329 av++; /* any or mac-type */ 4330 goto read_options; 4331 } 4332#endif 4333 4334 /* 4335 * protocol, mandatory 4336 */ 4337 OR_START(get_proto); 4338 NOT_BLOCK; 4339 NEED1("missing protocol"); 4340 if (add_proto_compat(cmd, *av, &proto)) { 4341 av++; 4342 if (F_LEN(cmd) != 0) { 4343 prev = cmd; 4344 cmd = next_cmd(cmd, &cblen); 4345 } 4346 } else if (first_cmd != cmd) { 4347 errx(EX_DATAERR, "invalid protocol ``%s''", *av); 4348 } else { 4349 rule->flags |= IPFW_RULE_JUSTOPTS; 4350 goto read_options; 4351 } 4352 OR_BLOCK(get_proto); 4353 4354 /* 4355 * "from", mandatory 4356 */ 4357 if ((av[0] == NULL) || _substrcmp(*av, "from") != 0) 4358 errx(EX_USAGE, "missing ``from''"); 4359 av++; 4360 4361 /* 4362 * source IP, mandatory 4363 */ 4364 OR_START(source_ip); 4365 NOT_BLOCK; /* optional "not" */ 4366 NEED1("missing source address"); 4367 if (add_src(cmd, *av, proto, cblen, tstate)) { 4368 av++; 4369 if (F_LEN(cmd) != 0) { /* ! any */ 4370 prev = cmd; 4371 cmd = next_cmd(cmd, &cblen); 4372 } 4373 } else 4374 errx(EX_USAGE, "bad source address %s", *av); 4375 OR_BLOCK(source_ip); 4376 4377 /* 4378 * source ports, optional 4379 */ 4380 NOT_BLOCK; /* optional "not" */ 4381 if ( av[0] != NULL ) { 4382 if (_substrcmp(*av, "any") == 0 || 4383 add_ports(cmd, *av, proto, O_IP_SRCPORT, cblen)) { 4384 av++; 4385 if (F_LEN(cmd) != 0) 4386 cmd = next_cmd(cmd, &cblen); 4387 } 4388 } 4389 4390 /* 4391 * "to", mandatory 4392 */ 4393 if ( (av[0] == NULL) || _substrcmp(*av, "to") != 0 ) 4394 errx(EX_USAGE, "missing ``to''"); 4395 av++; 4396 4397 /* 4398 * destination, mandatory 4399 */ 4400 OR_START(dest_ip); 4401 NOT_BLOCK; /* optional "not" */ 4402 NEED1("missing dst address"); 4403 if (add_dst(cmd, *av, proto, cblen, tstate)) { 4404 av++; 4405 if (F_LEN(cmd) != 0) { /* ! any */ 4406 prev = cmd; 4407 cmd = next_cmd(cmd, &cblen); 4408 } 4409 } else 4410 errx( EX_USAGE, "bad destination address %s", *av); 4411 OR_BLOCK(dest_ip); 4412 4413 /* 4414 * dest. ports, optional 4415 */ 4416 NOT_BLOCK; /* optional "not" */ 4417 if (av[0]) { 4418 if (_substrcmp(*av, "any") == 0 || 4419 add_ports(cmd, *av, proto, O_IP_DSTPORT, cblen)) { 4420 av++; 4421 if (F_LEN(cmd) != 0) 4422 cmd = next_cmd(cmd, &cblen); 4423 } 4424 } 4425 4426read_options: 4427 prev = NULL; 4428 while ( av[0] != NULL ) { 4429 char *s; 4430 ipfw_insn_u32 *cmd32; /* alias for cmd */ 4431 4432 s = *av; 4433 cmd32 = (ipfw_insn_u32 *)cmd; 4434 4435 if (*s == '!') { /* alternate syntax for NOT */ 4436 if (cmd->len & F_NOT) 4437 errx(EX_USAGE, "double \"not\" not allowed\n"); 4438 cmd->len = F_NOT; 4439 s++; 4440 } 4441 i = match_token(rule_options, s); 4442 av++; 4443 switch(i) { 4444 case TOK_NOT: 4445 if (cmd->len & F_NOT) 4446 errx(EX_USAGE, "double \"not\" not allowed\n"); 4447 cmd->len = F_NOT; 4448 break; 4449 4450 case TOK_OR: 4451 if (open_par == 0 || prev == NULL) 4452 errx(EX_USAGE, "invalid \"or\" block\n"); 4453 prev->len |= F_OR; 4454 break; 4455 4456 case TOK_STARTBRACE: 4457 if (open_par) 4458 errx(EX_USAGE, "+nested \"(\" not allowed\n"); 4459 open_par = 1; 4460 break; 4461 4462 case TOK_ENDBRACE: 4463 if (!open_par) 4464 errx(EX_USAGE, "+missing \")\"\n"); 4465 open_par = 0; 4466 prev = NULL; 4467 break; 4468 4469 case TOK_IN: 4470 fill_cmd(cmd, O_IN, 0, 0); 4471 break; 4472 4473 case TOK_OUT: 4474 cmd->len ^= F_NOT; /* toggle F_NOT */ 4475 fill_cmd(cmd, O_IN, 0, 0); 4476 break; 4477 4478 case TOK_DIVERTED: 4479 fill_cmd(cmd, O_DIVERTED, 0, 3); 4480 break; 4481 4482 case TOK_DIVERTEDLOOPBACK: 4483 fill_cmd(cmd, O_DIVERTED, 0, 1); 4484 break; 4485 4486 case TOK_DIVERTEDOUTPUT: 4487 fill_cmd(cmd, O_DIVERTED, 0, 2); 4488 break; 4489 4490 case TOK_FRAG: 4491 fill_cmd(cmd, O_FRAG, 0, 0); 4492 break; 4493 4494 case TOK_LAYER2: 4495 fill_cmd(cmd, O_LAYER2, 0, 0); 4496 break; 4497 4498 case TOK_XMIT: 4499 case TOK_RECV: 4500 case TOK_VIA: 4501 NEED1("recv, xmit, via require interface name" 4502 " or address"); 4503 fill_iface((ipfw_insn_if *)cmd, av[0], cblen, tstate); 4504 av++; 4505 if (F_LEN(cmd) == 0) /* not a valid address */ 4506 break; 4507 if (i == TOK_XMIT) 4508 cmd->opcode = O_XMIT; 4509 else if (i == TOK_RECV) 4510 cmd->opcode = O_RECV; 4511 else if (i == TOK_VIA) 4512 cmd->opcode = O_VIA; 4513 break; 4514 4515 case TOK_ICMPTYPES: 4516 NEED1("icmptypes requires list of types"); 4517 fill_icmptypes((ipfw_insn_u32 *)cmd, *av); 4518 av++; 4519 break; 4520 4521 case TOK_ICMP6TYPES: 4522 NEED1("icmptypes requires list of types"); 4523 fill_icmp6types((ipfw_insn_icmp6 *)cmd, *av, cblen); 4524 av++; 4525 break; 4526 4527 case TOK_IPTTL: 4528 NEED1("ipttl requires TTL"); 4529 if (strpbrk(*av, "-,")) { 4530 if (!add_ports(cmd, *av, 0, O_IPTTL, cblen)) 4531 errx(EX_DATAERR, "invalid ipttl %s", *av); 4532 } else 4533 fill_cmd(cmd, O_IPTTL, 0, strtoul(*av, NULL, 0)); 4534 av++; 4535 break; 4536 4537 case TOK_IPID: 4538 NEED1("ipid requires id"); 4539 if (strpbrk(*av, "-,")) { 4540 if (!add_ports(cmd, *av, 0, O_IPID, cblen)) 4541 errx(EX_DATAERR, "invalid ipid %s", *av); 4542 } else 4543 fill_cmd(cmd, O_IPID, 0, strtoul(*av, NULL, 0)); 4544 av++; 4545 break; 4546 4547 case TOK_IPLEN: 4548 NEED1("iplen requires length"); 4549 if (strpbrk(*av, "-,")) { 4550 if (!add_ports(cmd, *av, 0, O_IPLEN, cblen)) 4551 errx(EX_DATAERR, "invalid ip len %s", *av); 4552 } else 4553 fill_cmd(cmd, O_IPLEN, 0, strtoul(*av, NULL, 0)); 4554 av++; 4555 break; 4556 4557 case TOK_IPVER: 4558 NEED1("ipver requires version"); 4559 fill_cmd(cmd, O_IPVER, 0, strtoul(*av, NULL, 0)); 4560 av++; 4561 break; 4562 4563 case TOK_IPPRECEDENCE: 4564 NEED1("ipprecedence requires value"); 4565 fill_cmd(cmd, O_IPPRECEDENCE, 0, 4566 (strtoul(*av, NULL, 0) & 7) << 5); 4567 av++; 4568 break; 4569 4570 case TOK_DSCP: 4571 NEED1("missing DSCP code"); 4572 fill_dscp(cmd, *av, cblen); 4573 av++; 4574 break; 4575 4576 case TOK_IPOPTS: 4577 NEED1("missing argument for ipoptions"); 4578 fill_flags_cmd(cmd, O_IPOPT, f_ipopts, *av); 4579 av++; 4580 break; 4581 4582 case TOK_IPTOS: 4583 NEED1("missing argument for iptos"); 4584 fill_flags_cmd(cmd, O_IPTOS, f_iptos, *av); 4585 av++; 4586 break; 4587 4588 case TOK_UID: 4589 NEED1("uid requires argument"); 4590 { 4591 char *end; 4592 uid_t uid; 4593 struct passwd *pwd; 4594 4595 cmd->opcode = O_UID; 4596 uid = strtoul(*av, &end, 0); 4597 pwd = (*end == '\0') ? getpwuid(uid) : getpwnam(*av); 4598 if (pwd == NULL) 4599 errx(EX_DATAERR, "uid \"%s\" nonexistent", *av); 4600 cmd32->d[0] = pwd->pw_uid; 4601 cmd->len |= F_INSN_SIZE(ipfw_insn_u32); 4602 av++; 4603 } 4604 break; 4605 4606 case TOK_GID: 4607 NEED1("gid requires argument"); 4608 { 4609 char *end; 4610 gid_t gid; 4611 struct group *grp; 4612 4613 cmd->opcode = O_GID; 4614 gid = strtoul(*av, &end, 0); 4615 grp = (*end == '\0') ? getgrgid(gid) : getgrnam(*av); 4616 if (grp == NULL) 4617 errx(EX_DATAERR, "gid \"%s\" nonexistent", *av); 4618 cmd32->d[0] = grp->gr_gid; 4619 cmd->len |= F_INSN_SIZE(ipfw_insn_u32); 4620 av++; 4621 } 4622 break; 4623 4624 case TOK_JAIL: 4625 NEED1("jail requires argument"); 4626 { 4627 int jid; 4628 4629 cmd->opcode = O_JAIL; 4630 jid = jail_getid(*av); 4631 if (jid < 0) 4632 errx(EX_DATAERR, "%s", jail_errmsg); 4633 cmd32->d[0] = (uint32_t)jid; 4634 cmd->len |= F_INSN_SIZE(ipfw_insn_u32); 4635 av++; 4636 } 4637 break; 4638 4639 case TOK_ESTAB: 4640 fill_cmd(cmd, O_ESTAB, 0, 0); 4641 break; 4642 4643 case TOK_SETUP: 4644 fill_cmd(cmd, O_TCPFLAGS, 0, 4645 (TH_SYN) | ( (TH_ACK) & 0xff) <<8 ); 4646 break; 4647 4648 case TOK_TCPDATALEN: 4649 NEED1("tcpdatalen requires length"); 4650 if (strpbrk(*av, "-,")) { 4651 if (!add_ports(cmd, *av, 0, O_TCPDATALEN, cblen)) 4652 errx(EX_DATAERR, "invalid tcpdata len %s", *av); 4653 } else 4654 fill_cmd(cmd, O_TCPDATALEN, 0, 4655 strtoul(*av, NULL, 0)); 4656 av++; 4657 break; 4658 4659 case TOK_TCPOPTS: 4660 NEED1("missing argument for tcpoptions"); 4661 fill_flags_cmd(cmd, O_TCPOPTS, f_tcpopts, *av); 4662 av++; 4663 break; 4664 4665 case TOK_TCPSEQ: 4666 case TOK_TCPACK: 4667 NEED1("tcpseq/tcpack requires argument"); 4668 cmd->len = F_INSN_SIZE(ipfw_insn_u32); 4669 cmd->opcode = (i == TOK_TCPSEQ) ? O_TCPSEQ : O_TCPACK; 4670 cmd32->d[0] = htonl(strtoul(*av, NULL, 0)); 4671 av++; 4672 break; 4673 4674 case TOK_TCPWIN: 4675 NEED1("tcpwin requires length"); 4676 if (strpbrk(*av, "-,")) { 4677 if (!add_ports(cmd, *av, 0, O_TCPWIN, cblen)) 4678 errx(EX_DATAERR, "invalid tcpwin len %s", *av); 4679 } else 4680 fill_cmd(cmd, O_TCPWIN, 0, 4681 strtoul(*av, NULL, 0)); 4682 av++; 4683 break; 4684 4685 case TOK_TCPFLAGS: 4686 NEED1("missing argument for tcpflags"); 4687 cmd->opcode = O_TCPFLAGS; 4688 fill_flags_cmd(cmd, O_TCPFLAGS, f_tcpflags, *av); 4689 av++; 4690 break; 4691 4692 case TOK_KEEPSTATE: 4693 case TOK_RECORDSTATE: { 4694 uint16_t uidx; 4695 4696 if (open_par) 4697 errx(EX_USAGE, "keep-state or record-state cannot be part " 4698 "of an or block"); 4699 if (have_state) 4700 errx(EX_USAGE, "only one of keep-state, record-state, " 4701 " limit and set-limit is allowed"); 4702 if (*av != NULL && *av[0] == ':') { 4703 if (state_check_name(*av + 1) != 0) 4704 errx(EX_DATAERR, 4705 "Invalid state name %s", *av); 4706 uidx = pack_object(tstate, *av + 1, 4707 IPFW_TLV_STATE_NAME); 4708 av++; 4709 } else 4710 uidx = pack_object(tstate, default_state_name, 4711 IPFW_TLV_STATE_NAME); 4712 have_state = cmd; 4713 have_rstate = i == TOK_RECORDSTATE; 4714 fill_cmd(cmd, O_KEEP_STATE, 0, uidx); 4715 break; 4716 } 4717 4718 case TOK_LIMIT: 4719 case TOK_SETLIMIT: { 4720 ipfw_insn_limit *c = (ipfw_insn_limit *)cmd; 4721 int val; 4722 4723 if (open_par) 4724 errx(EX_USAGE, 4725 "limit or set-limit cannot be part of an or block"); 4726 if (have_state) 4727 errx(EX_USAGE, "only one of keep-state, record-state, " 4728 " limit and set-limit is allowed"); 4729 have_state = cmd; 4730 have_rstate = i == TOK_SETLIMIT; 4731 4732 cmd->len = F_INSN_SIZE(ipfw_insn_limit); 4733 CHECK_CMDLEN; 4734 cmd->opcode = O_LIMIT; 4735 c->limit_mask = c->conn_limit = 0; 4736 4737 while ( av[0] != NULL ) { 4738 if ((val = match_token(limit_masks, *av)) <= 0) 4739 break; 4740 c->limit_mask |= val; 4741 av++; 4742 } 4743 4744 if (c->limit_mask == 0) 4745 errx(EX_USAGE, "limit: missing limit mask"); 4746 4747 GET_UINT_ARG(c->conn_limit, IPFW_ARG_MIN, IPFW_ARG_MAX, 4748 TOK_LIMIT, rule_options); 4749 av++; 4750 4751 if (*av != NULL && *av[0] == ':') { 4752 if (state_check_name(*av + 1) != 0) 4753 errx(EX_DATAERR, 4754 "Invalid state name %s", *av); 4755 cmd->arg1 = pack_object(tstate, *av + 1, 4756 IPFW_TLV_STATE_NAME); 4757 av++; 4758 } else 4759 cmd->arg1 = pack_object(tstate, 4760 default_state_name, IPFW_TLV_STATE_NAME); 4761 break; 4762 } 4763 4764 case TOK_PROTO: 4765 NEED1("missing protocol"); 4766 if (add_proto(cmd, *av, &proto)) { 4767 av++; 4768 } else 4769 errx(EX_DATAERR, "invalid protocol ``%s''", 4770 *av); 4771 break; 4772 4773 case TOK_SRCIP: 4774 NEED1("missing source IP"); 4775 if (add_srcip(cmd, *av, cblen, tstate)) { 4776 av++; 4777 } 4778 break; 4779 4780 case TOK_DSTIP: 4781 NEED1("missing destination IP"); 4782 if (add_dstip(cmd, *av, cblen, tstate)) { 4783 av++; 4784 } 4785 break; 4786 4787 case TOK_SRCIP6: 4788 NEED1("missing source IP6"); 4789 if (add_srcip6(cmd, *av, cblen, tstate)) { 4790 av++; 4791 } 4792 break; 4793 4794 case TOK_DSTIP6: 4795 NEED1("missing destination IP6"); 4796 if (add_dstip6(cmd, *av, cblen, tstate)) { 4797 av++; 4798 } 4799 break; 4800 4801 case TOK_SRCPORT: 4802 NEED1("missing source port"); 4803 if (_substrcmp(*av, "any") == 0 || 4804 add_ports(cmd, *av, proto, O_IP_SRCPORT, cblen)) { 4805 av++; 4806 } else 4807 errx(EX_DATAERR, "invalid source port %s", *av); 4808 break; 4809 4810 case TOK_DSTPORT: 4811 NEED1("missing destination port"); 4812 if (_substrcmp(*av, "any") == 0 || 4813 add_ports(cmd, *av, proto, O_IP_DSTPORT, cblen)) { 4814 av++; 4815 } else 4816 errx(EX_DATAERR, "invalid destination port %s", 4817 *av); 4818 break; 4819 4820 case TOK_MAC: 4821 if (add_mac(cmd, av, cblen)) 4822 av += 2; 4823 break; 4824 4825 case TOK_MACTYPE: 4826 NEED1("missing mac type"); 4827 if (!add_mactype(cmd, *av, cblen)) 4828 errx(EX_DATAERR, "invalid mac type %s", *av); 4829 av++; 4830 break; 4831 4832 case TOK_VERREVPATH: 4833 fill_cmd(cmd, O_VERREVPATH, 0, 0); 4834 break; 4835 4836 case TOK_VERSRCREACH: 4837 fill_cmd(cmd, O_VERSRCREACH, 0, 0); 4838 break; 4839 4840 case TOK_ANTISPOOF: 4841 fill_cmd(cmd, O_ANTISPOOF, 0, 0); 4842 break; 4843 4844 case TOK_IPSEC: 4845 fill_cmd(cmd, O_IPSEC, 0, 0); 4846 break; 4847 4848 case TOK_IPV6: 4849 fill_cmd(cmd, O_IP6, 0, 0); 4850 break; 4851 4852 case TOK_IPV4: 4853 fill_cmd(cmd, O_IP4, 0, 0); 4854 break; 4855 4856 case TOK_EXT6HDR: 4857 fill_ext6hdr( cmd, *av ); 4858 av++; 4859 break; 4860 4861 case TOK_FLOWID: 4862 if (proto != IPPROTO_IPV6 ) 4863 errx( EX_USAGE, "flow-id filter is active " 4864 "only for ipv6 protocol\n"); 4865 fill_flow6( (ipfw_insn_u32 *) cmd, *av, cblen); 4866 av++; 4867 break; 4868 4869 case TOK_COMMENT: 4870 fill_comment(cmd, av, cblen); 4871 av[0]=NULL; 4872 break; 4873 4874 case TOK_TAGGED: 4875 if (av[0] && strpbrk(*av, "-,")) { 4876 if (!add_ports(cmd, *av, 0, O_TAGGED, cblen)) 4877 errx(EX_DATAERR, "tagged: invalid tag" 4878 " list: %s", *av); 4879 } 4880 else { 4881 uint16_t tag; 4882 4883 GET_UINT_ARG(tag, IPFW_ARG_MIN, IPFW_ARG_MAX, 4884 TOK_TAGGED, rule_options); 4885 fill_cmd(cmd, O_TAGGED, 0, tag); 4886 } 4887 av++; 4888 break; 4889 4890 case TOK_FIB: 4891 NEED1("fib requires fib number"); 4892 fill_cmd(cmd, O_FIB, 0, strtoul(*av, NULL, 0)); 4893 av++; 4894 break; 4895 case TOK_SOCKARG: 4896 fill_cmd(cmd, O_SOCKARG, 0, 0); 4897 break; 4898 4899 case TOK_LOOKUP: { 4900 ipfw_insn_u32 *c = (ipfw_insn_u32 *)cmd; 4901 int j; 4902 4903 if (!av[0] || !av[1]) 4904 errx(EX_USAGE, "format: lookup argument tablenum"); 4905 cmd->opcode = O_IP_DST_LOOKUP; 4906 cmd->len |= F_INSN_SIZE(ipfw_insn) + 2; 4907 i = match_token(rule_options, *av); 4908 for (j = 0; lookup_key[j] >= 0 ; j++) { 4909 if (i == lookup_key[j]) 4910 break; 4911 } 4912 if (lookup_key[j] <= 0) 4913 errx(EX_USAGE, "format: cannot lookup on %s", *av); 4914 __PAST_END(c->d, 1) = j; // i converted to option 4915 av++; 4916 4917 if ((j = pack_table(tstate, *av)) == 0) 4918 errx(EX_DATAERR, "Invalid table name: %s", *av); 4919 4920 cmd->arg1 = j; 4921 av++; 4922 } 4923 break; 4924 case TOK_FLOW: 4925 NEED1("missing table name"); 4926 if (strncmp(*av, "table(", 6) != 0) 4927 errx(EX_DATAERR, 4928 "enclose table name into \"table()\""); 4929 fill_table(cmd, *av, O_IP_FLOW_LOOKUP, tstate); 4930 av++; 4931 break; 4932 4933 case TOK_SKIPACTION: 4934 if (have_skipcmd) 4935 errx(EX_USAGE, "only one defer-action " 4936 "is allowed"); 4937 have_skipcmd = cmd; 4938 fill_cmd(cmd, O_SKIP_ACTION, 0, 0); 4939 break; 4940 4941 default: 4942 errx(EX_USAGE, "unrecognised option [%d] %s\n", i, s); 4943 } 4944 if (F_LEN(cmd) > 0) { /* prepare to advance */ 4945 prev = cmd; 4946 cmd = next_cmd(cmd, &cblen); 4947 } 4948 } 4949 4950done: 4951 4952 if (!have_state && have_skipcmd) 4953 warnx("Rule contains \"defer-immediate-action\" " 4954 "and doesn't contain any state-related options."); 4955 4956 /* 4957 * Now copy stuff into the rule. 4958 * If we have a keep-state option, the first instruction 4959 * must be a PROBE_STATE (which is generated here). 4960 * If we have a LOG option, it was stored as the first command, 4961 * and now must be moved to the top of the action part. 4962 */ 4963 dst = (ipfw_insn *)rule->cmd; 4964 4965 /* 4966 * First thing to write into the command stream is the match probability. 4967 */ 4968 if (match_prob != 1) { /* 1 means always match */ 4969 dst->opcode = O_PROB; 4970 dst->len = 2; 4971 *((int32_t *)(dst+1)) = (int32_t)(match_prob * 0x7fffffff); 4972 dst += dst->len; 4973 } 4974 4975 /* 4976 * generate O_PROBE_STATE if necessary 4977 */ 4978 if (have_state && have_state->opcode != O_CHECK_STATE && !have_rstate) { 4979 fill_cmd(dst, O_PROBE_STATE, 0, have_state->arg1); 4980 dst = next_cmd(dst, &rblen); 4981 } 4982 4983 /* 4984 * copy all commands but O_LOG, O_KEEP_STATE, O_LIMIT, O_ALTQ, O_TAG, 4985 * O_SKIP_ACTION 4986 */ 4987 for (src = (ipfw_insn *)cmdbuf; src != cmd; src += i) { 4988 i = F_LEN(src); 4989 CHECK_RBUFLEN(i); 4990 4991 switch (src->opcode) { 4992 case O_LOG: 4993 case O_KEEP_STATE: 4994 case O_LIMIT: 4995 case O_ALTQ: 4996 case O_TAG: 4997 case O_SKIP_ACTION: 4998 break; 4999 default: 5000 bcopy(src, dst, i * sizeof(uint32_t)); 5001 dst += i; 5002 } 5003 } 5004 5005 /* 5006 * put back the have_state command as last opcode 5007 */ 5008 if (have_state && have_state->opcode != O_CHECK_STATE) { 5009 i = F_LEN(have_state); 5010 CHECK_RBUFLEN(i); 5011 bcopy(have_state, dst, i * sizeof(uint32_t)); 5012 dst += i; 5013 } 5014 5015 /* 5016 * put back the have_skipcmd command as very last opcode 5017 */ 5018 if (have_skipcmd) { 5019 i = F_LEN(have_skipcmd); 5020 CHECK_RBUFLEN(i); 5021 bcopy(have_skipcmd, dst, i * sizeof(uint32_t)); 5022 dst += i; 5023 } 5024 5025 /* 5026 * start action section 5027 */ 5028 rule->act_ofs = dst - rule->cmd; 5029 5030 /* put back O_LOG, O_ALTQ, O_TAG if necessary */ 5031 if (have_log) { 5032 i = F_LEN(have_log); 5033 CHECK_RBUFLEN(i); 5034 bcopy(have_log, dst, i * sizeof(uint32_t)); 5035 dst += i; 5036 } 5037 if (have_altq) { 5038 i = F_LEN(have_altq); 5039 CHECK_RBUFLEN(i); 5040 bcopy(have_altq, dst, i * sizeof(uint32_t)); 5041 dst += i; 5042 } 5043 if (have_tag) { 5044 i = F_LEN(have_tag); 5045 CHECK_RBUFLEN(i); 5046 bcopy(have_tag, dst, i * sizeof(uint32_t)); 5047 dst += i; 5048 } 5049 5050 /* 5051 * copy all other actions 5052 */ 5053 for (src = (ipfw_insn *)actbuf; src != action; src += i) { 5054 i = F_LEN(src); 5055 CHECK_RBUFLEN(i); 5056 bcopy(src, dst, i * sizeof(uint32_t)); 5057 dst += i; 5058 } 5059 5060 rule->cmd_len = (uint32_t *)dst - (uint32_t *)(rule->cmd); 5061 *rbufsize = (char *)dst - (char *)rule; 5062} 5063 5064static int 5065compare_ntlv(const void *_a, const void *_b) 5066{ 5067 ipfw_obj_ntlv *a, *b; 5068 5069 a = (ipfw_obj_ntlv *)_a; 5070 b = (ipfw_obj_ntlv *)_b; 5071 5072 if (a->set < b->set) 5073 return (-1); 5074 else if (a->set > b->set) 5075 return (1); 5076 5077 if (a->idx < b->idx) 5078 return (-1); 5079 else if (a->idx > b->idx) 5080 return (1); 5081 5082 if (a->head.type < b->head.type) 5083 return (-1); 5084 else if (a->head.type > b->head.type) 5085 return (1); 5086 5087 return (0); 5088} 5089 5090/* 5091 * Provide kernel with sorted list of referenced objects 5092 */ 5093static void 5094object_sort_ctlv(ipfw_obj_ctlv *ctlv) 5095{ 5096 5097 qsort(ctlv + 1, ctlv->count, ctlv->objsize, compare_ntlv); 5098} 5099 5100struct object_kt { 5101 uint16_t uidx; 5102 uint16_t type; 5103}; 5104static int 5105compare_object_kntlv(const void *k, const void *v) 5106{ 5107 ipfw_obj_ntlv *ntlv; 5108 struct object_kt key; 5109 5110 key = *((struct object_kt *)k); 5111 ntlv = (ipfw_obj_ntlv *)v; 5112 5113 if (key.uidx < ntlv->idx) 5114 return (-1); 5115 else if (key.uidx > ntlv->idx) 5116 return (1); 5117 5118 if (key.type < ntlv->head.type) 5119 return (-1); 5120 else if (key.type > ntlv->head.type) 5121 return (1); 5122 5123 return (0); 5124} 5125 5126/* 5127 * Finds object name in @ctlv by @idx and @type. 5128 * Uses the following facts: 5129 * 1) All TLVs are the same size 5130 * 2) Kernel implementation provides already sorted list. 5131 * 5132 * Returns table name or NULL. 5133 */ 5134static char * 5135object_search_ctlv(ipfw_obj_ctlv *ctlv, uint16_t idx, uint16_t type) 5136{ 5137 ipfw_obj_ntlv *ntlv; 5138 struct object_kt key; 5139 5140 key.uidx = idx; 5141 key.type = type; 5142 5143 ntlv = bsearch(&key, (ctlv + 1), ctlv->count, ctlv->objsize, 5144 compare_object_kntlv); 5145 5146 if (ntlv != NULL) 5147 return (ntlv->name); 5148 5149 return (NULL); 5150} 5151 5152static char * 5153table_search_ctlv(ipfw_obj_ctlv *ctlv, uint16_t idx) 5154{ 5155 5156 return (object_search_ctlv(ctlv, idx, IPFW_TLV_TBL_NAME)); 5157} 5158 5159/* 5160 * Adds one or more rules to ipfw chain. 5161 * Data layout: 5162 * Request: 5163 * [ 5164 * ip_fw3_opheader 5165 * [ ipfw_obj_ctlv(IPFW_TLV_TBL_LIST) ipfw_obj_ntlv x N ] (optional *1) 5166 * [ ipfw_obj_ctlv(IPFW_TLV_RULE_LIST) [ ip_fw_rule ip_fw_insn ] x N ] (*2) (*3) 5167 * ] 5168 * Reply: 5169 * [ 5170 * ip_fw3_opheader 5171 * [ ipfw_obj_ctlv(IPFW_TLV_TBL_LIST) ipfw_obj_ntlv x N ] (optional) 5172 * [ ipfw_obj_ctlv(IPFW_TLV_RULE_LIST) [ ip_fw_rule ip_fw_insn ] x N ] 5173 * ] 5174 * 5175 * Rules in reply are modified to store their actual ruleset number. 5176 * 5177 * (*1) TLVs inside IPFW_TLV_TBL_LIST needs to be sorted ascending 5178 * according to their idx field and there has to be no duplicates. 5179 * (*2) Numbered rules inside IPFW_TLV_RULE_LIST needs to be sorted ascending. 5180 * (*3) Each ip_fw structure needs to be aligned to u64 boundary. 5181 */ 5182void 5183ipfw_add(char *av[]) 5184{ 5185 uint32_t rulebuf[1024]; 5186 int rbufsize, default_off, tlen, rlen; 5187 size_t sz; 5188 struct tidx ts; 5189 struct ip_fw_rule *rule; 5190 caddr_t tbuf; 5191 ip_fw3_opheader *op3; 5192 ipfw_obj_ctlv *ctlv, *tstate; 5193 5194 rbufsize = sizeof(rulebuf); 5195 memset(rulebuf, 0, rbufsize); 5196 memset(&ts, 0, sizeof(ts)); 5197 5198 /* Optimize case with no tables */ 5199 default_off = sizeof(ipfw_obj_ctlv) + sizeof(ip_fw3_opheader); 5200 op3 = (ip_fw3_opheader *)rulebuf; 5201 ctlv = (ipfw_obj_ctlv *)(op3 + 1); 5202 rule = (struct ip_fw_rule *)(ctlv + 1); 5203 rbufsize -= default_off; 5204 5205 compile_rule(av, (uint32_t *)rule, &rbufsize, &ts); 5206 /* Align rule size to u64 boundary */ 5207 rlen = roundup2(rbufsize, sizeof(uint64_t)); 5208 5209 tbuf = NULL; 5210 sz = 0; 5211 tstate = NULL; 5212 if (ts.count != 0) { 5213 /* Some tables. We have to alloc more data */ 5214 tlen = ts.count * sizeof(ipfw_obj_ntlv); 5215 sz = default_off + sizeof(ipfw_obj_ctlv) + tlen + rlen; 5216 5217 if ((tbuf = calloc(1, sz)) == NULL) 5218 err(EX_UNAVAILABLE, "malloc() failed for IP_FW_ADD"); 5219 op3 = (ip_fw3_opheader *)tbuf; 5220 /* Tables first */ 5221 ctlv = (ipfw_obj_ctlv *)(op3 + 1); 5222 ctlv->head.type = IPFW_TLV_TBLNAME_LIST; 5223 ctlv->head.length = sizeof(ipfw_obj_ctlv) + tlen; 5224 ctlv->count = ts.count; 5225 ctlv->objsize = sizeof(ipfw_obj_ntlv); 5226 memcpy(ctlv + 1, ts.idx, tlen); 5227 object_sort_ctlv(ctlv); 5228 tstate = ctlv; 5229 /* Rule next */ 5230 ctlv = (ipfw_obj_ctlv *)((caddr_t)ctlv + ctlv->head.length); 5231 ctlv->head.type = IPFW_TLV_RULE_LIST; 5232 ctlv->head.length = sizeof(ipfw_obj_ctlv) + rlen; 5233 ctlv->count = 1; 5234 memcpy(ctlv + 1, rule, rbufsize); 5235 } else { 5236 /* Simply add header */ 5237 sz = rlen + default_off; 5238 memset(ctlv, 0, sizeof(*ctlv)); 5239 ctlv->head.type = IPFW_TLV_RULE_LIST; 5240 ctlv->head.length = sizeof(ipfw_obj_ctlv) + rlen; 5241 ctlv->count = 1; 5242 } 5243 5244 if (do_get3(IP_FW_XADD, op3, &sz) != 0) 5245 err(EX_UNAVAILABLE, "getsockopt(%s)", "IP_FW_XADD"); 5246 5247 if (!co.do_quiet) { 5248 struct format_opts sfo; 5249 struct buf_pr bp; 5250 memset(&sfo, 0, sizeof(sfo)); 5251 sfo.tstate = tstate; 5252 sfo.set_mask = (uint32_t)(-1); 5253 bp_alloc(&bp, 4096); 5254 show_static_rule(&co, &sfo, &bp, rule, NULL); 5255 printf("%s", bp.buf); 5256 bp_free(&bp); 5257 } 5258 5259 if (tbuf != NULL) 5260 free(tbuf); 5261 5262 if (ts.idx != NULL) 5263 free(ts.idx); 5264} 5265 5266/* 5267 * clear the counters or the log counters. 5268 * optname has the following values: 5269 * 0 (zero both counters and logging) 5270 * 1 (zero logging only) 5271 */ 5272void 5273ipfw_zero(int ac, char *av[], int optname) 5274{ 5275 ipfw_range_tlv rt; 5276 char const *errstr; 5277 char const *name = optname ? "RESETLOG" : "ZERO"; 5278 uint32_t arg; 5279 int failed = EX_OK; 5280 5281 optname = optname ? IP_FW_XRESETLOG : IP_FW_XZERO; 5282 av++; ac--; 5283 5284 if (ac == 0) { 5285 /* clear all entries */ 5286 memset(&rt, 0, sizeof(rt)); 5287 rt.flags = IPFW_RCFLAG_ALL; 5288 if (do_range_cmd(optname, &rt) < 0) 5289 err(EX_UNAVAILABLE, "setsockopt(IP_FW_X%s)", name); 5290 if (!co.do_quiet) 5291 printf("%s.\n", optname == IP_FW_XZERO ? 5292 "Accounting cleared":"Logging counts reset"); 5293 5294 return; 5295 } 5296 5297 while (ac) { 5298 /* Rule number */ 5299 if (isdigit(**av)) { 5300 arg = strtonum(*av, 0, 0xffff, &errstr); 5301 if (errstr) 5302 errx(EX_DATAERR, 5303 "invalid rule number %s\n", *av); 5304 memset(&rt, 0, sizeof(rt)); 5305 rt.start_rule = arg; 5306 rt.end_rule = arg; 5307 rt.flags |= IPFW_RCFLAG_RANGE; 5308 if (co.use_set != 0) { 5309 rt.set = co.use_set - 1; 5310 rt.flags |= IPFW_RCFLAG_SET; 5311 } 5312 if (do_range_cmd(optname, &rt) != 0) { 5313 warn("rule %u: setsockopt(IP_FW_X%s)", 5314 arg, name); 5315 failed = EX_UNAVAILABLE; 5316 } else if (rt.new_set == 0) { 5317 printf("Entry %d not found\n", arg); 5318 failed = EX_UNAVAILABLE; 5319 } else if (!co.do_quiet) 5320 printf("Entry %d %s.\n", arg, 5321 optname == IP_FW_XZERO ? 5322 "cleared" : "logging count reset"); 5323 } else { 5324 errx(EX_USAGE, "invalid rule number ``%s''", *av); 5325 } 5326 av++; ac--; 5327 } 5328 if (failed != EX_OK) 5329 exit(failed); 5330} 5331 5332void 5333ipfw_flush(int force) 5334{ 5335 ipfw_range_tlv rt; 5336 5337 if (!force && !co.do_quiet) { /* need to ask user */ 5338 int c; 5339 5340 printf("Are you sure? [yn] "); 5341 fflush(stdout); 5342 do { 5343 c = toupper(getc(stdin)); 5344 while (c != '\n' && getc(stdin) != '\n') 5345 if (feof(stdin)) 5346 return; /* and do not flush */ 5347 } while (c != 'Y' && c != 'N'); 5348 printf("\n"); 5349 if (c == 'N') /* user said no */ 5350 return; 5351 } 5352 if (co.do_pipe) { 5353 dummynet_flush(); 5354 return; 5355 } 5356 /* `ipfw set N flush` - is the same that `ipfw delete set N` */ 5357 memset(&rt, 0, sizeof(rt)); 5358 if (co.use_set != 0) { 5359 rt.set = co.use_set - 1; 5360 rt.flags = IPFW_RCFLAG_SET; 5361 } else 5362 rt.flags = IPFW_RCFLAG_ALL; 5363 if (do_range_cmd(IP_FW_XDEL, &rt) != 0) 5364 err(EX_UNAVAILABLE, "setsockopt(IP_FW_XDEL)"); 5365 if (!co.do_quiet) 5366 printf("Flushed all %s.\n", co.do_pipe ? "pipes" : "rules"); 5367} 5368 5369static struct _s_x intcmds[] = { 5370 { "talist", TOK_TALIST }, 5371 { "iflist", TOK_IFLIST }, 5372 { "olist", TOK_OLIST }, 5373 { "vlist", TOK_VLIST }, 5374 { NULL, 0 } 5375}; 5376 5377static struct _s_x otypes[] = { 5378 { "EACTION", IPFW_TLV_EACTION }, 5379 { "DYNSTATE", IPFW_TLV_STATE_NAME }, 5380 { NULL, 0 } 5381}; 5382 5383static const char* 5384lookup_eaction_name(ipfw_obj_ntlv *ntlv, int cnt, uint16_t type) 5385{ 5386 const char *name; 5387 int i; 5388 5389 name = NULL; 5390 for (i = 0; i < cnt; i++) { 5391 if (ntlv[i].head.type != IPFW_TLV_EACTION) 5392 continue; 5393 if (IPFW_TLV_EACTION_NAME(ntlv[i].idx) != type) 5394 continue; 5395 name = ntlv[i].name; 5396 break; 5397 } 5398 return (name); 5399} 5400 5401static void 5402ipfw_list_objects(int ac, char *av[]) 5403{ 5404 ipfw_obj_lheader req, *olh; 5405 ipfw_obj_ntlv *ntlv; 5406 const char *name; 5407 size_t sz; 5408 int i; 5409 5410 memset(&req, 0, sizeof(req)); 5411 sz = sizeof(req); 5412 if (do_get3(IP_FW_DUMP_SRVOBJECTS, &req.opheader, &sz) != 0) 5413 if (errno != ENOMEM) 5414 return; 5415 5416 sz = req.size; 5417 if ((olh = calloc(1, sz)) == NULL) 5418 return; 5419 5420 olh->size = sz; 5421 if (do_get3(IP_FW_DUMP_SRVOBJECTS, &olh->opheader, &sz) != 0) { 5422 free(olh); 5423 return; 5424 } 5425 5426 if (olh->count > 0) 5427 printf("Objects list:\n"); 5428 else 5429 printf("There are no objects\n"); 5430 ntlv = (ipfw_obj_ntlv *)(olh + 1); 5431 for (i = 0; i < olh->count; i++) { 5432 name = match_value(otypes, ntlv->head.type); 5433 if (name == NULL) 5434 name = lookup_eaction_name( 5435 (ipfw_obj_ntlv *)(olh + 1), olh->count, 5436 ntlv->head.type); 5437 if (name == NULL) 5438 printf(" kidx: %4d\ttype: %10d\tname: %s\n", 5439 ntlv->idx, ntlv->head.type, ntlv->name); 5440 else 5441 printf(" kidx: %4d\ttype: %10s\tname: %s\n", 5442 ntlv->idx, name, ntlv->name); 5443 ntlv++; 5444 } 5445 free(olh); 5446} 5447 5448void 5449ipfw_internal_handler(int ac, char *av[]) 5450{ 5451 int tcmd; 5452 5453 ac--; av++; 5454 NEED1("internal cmd required"); 5455 5456 if ((tcmd = match_token(intcmds, *av)) == -1) 5457 errx(EX_USAGE, "invalid internal sub-cmd: %s", *av); 5458 5459 switch (tcmd) { 5460 case TOK_IFLIST: 5461 ipfw_list_tifaces(); 5462 break; 5463 case TOK_TALIST: 5464 ipfw_list_ta(ac, av); 5465 break; 5466 case TOK_OLIST: 5467 ipfw_list_objects(ac, av); 5468 break; 5469 case TOK_VLIST: 5470 ipfw_list_values(ac, av); 5471 break; 5472 } 5473} 5474 5475static int 5476ipfw_get_tracked_ifaces(ipfw_obj_lheader **polh) 5477{ 5478 ipfw_obj_lheader req, *olh; 5479 size_t sz; 5480 5481 memset(&req, 0, sizeof(req)); 5482 sz = sizeof(req); 5483 5484 if (do_get3(IP_FW_XIFLIST, &req.opheader, &sz) != 0) { 5485 if (errno != ENOMEM) 5486 return (errno); 5487 } 5488 5489 sz = req.size; 5490 if ((olh = calloc(1, sz)) == NULL) 5491 return (ENOMEM); 5492 5493 olh->size = sz; 5494 if (do_get3(IP_FW_XIFLIST, &olh->opheader, &sz) != 0) { 5495 free(olh); 5496 return (errno); 5497 } 5498 5499 *polh = olh; 5500 return (0); 5501} 5502 5503static int 5504ifinfo_cmp(const void *a, const void *b) 5505{ 5506 ipfw_iface_info *ia, *ib; 5507 5508 ia = (ipfw_iface_info *)a; 5509 ib = (ipfw_iface_info *)b; 5510 5511 return (stringnum_cmp(ia->ifname, ib->ifname)); 5512} 5513 5514/* 5515 * Retrieves table list from kernel, 5516 * optionally sorts it and calls requested function for each table. 5517 * Returns 0 on success. 5518 */ 5519static void 5520ipfw_list_tifaces() 5521{ 5522 ipfw_obj_lheader *olh; 5523 ipfw_iface_info *info; 5524 int i, error; 5525 5526 if ((error = ipfw_get_tracked_ifaces(&olh)) != 0) 5527 err(EX_OSERR, "Unable to request ipfw tracked interface list"); 5528 5529 5530 qsort(olh + 1, olh->count, olh->objsize, ifinfo_cmp); 5531 5532 info = (ipfw_iface_info *)(olh + 1); 5533 for (i = 0; i < olh->count; i++) { 5534 if (info->flags & IPFW_IFFLAG_RESOLVED) 5535 printf("%s ifindex: %d refcount: %u changes: %u\n", 5536 info->ifname, info->ifindex, info->refcnt, 5537 info->gencnt); 5538 else 5539 printf("%s ifindex: unresolved refcount: %u changes: %u\n", 5540 info->ifname, info->refcnt, info->gencnt); 5541 info = (ipfw_iface_info *)((caddr_t)info + olh->objsize); 5542 } 5543 5544 free(olh); 5545} 5546 5547 5548 5549 5550