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 * $FreeBSD$ 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 <netdb.h> 36 #include <pwd.h> 37 #include <stdio.h> 38 #include <stdarg.h> 39 #include <stdlib.h> 40 #include <string.h> 41 #include <sysexits.h> 42 #include <time.h> /* ctime */ 43 #include <timeconv.h> /* _long_to_time */ 44 #include <unistd.h> 45 #include <fcntl.h> 46 #include <stddef.h> /* offsetof */ 47 48 #include <net/ethernet.h> 49 #include <net/if.h> /* only IFNAMSIZ */ 50 #include <netinet/in.h> 51 #include <netinet/in_systm.h> /* only n_short, n_long */ 52 #include <netinet/ip.h> 53 #include <netinet/ip_icmp.h> 54 #include <netinet/ip_fw.h> 55 #include <netinet/tcp.h> 56 #include <arpa/inet.h> 57 58 struct cmdline_opts co; /* global options */ 59 60 struct format_opts { 61 int bcwidth; 62 int pcwidth; 63 int show_counters; 64 int show_time; /* show timestamp */ 65 uint32_t set_mask; /* enabled sets mask */ 66 uint32_t flags; /* request flags */ 67 uint32_t first; /* first rule to request */ 68 uint32_t last; /* last rule to request */ 69 uint32_t dcnt; /* number of dynamic states */ 70 ipfw_obj_ctlv *tstate; /* table state data */ 71 }; 72 73 int resvd_set_number = RESVD_SET; 74 75 int ipfw_socket = -1; 76 77 #define CHECK_LENGTH(v, len) do { \ 78 if ((v) < (len)) \ 79 errx(EX_DATAERR, "Rule too long"); \ 80 } while (0) 81 /* 82 * Check if we have enough space in cmd buffer. Note that since 83 * first 8? u32 words are reserved by reserved header, full cmd 84 * buffer can't be used, so we need to protect from buffer overrun 85 * only. At the beginning, cblen is less than actual buffer size by 86 * size of ipfw_insn_u32 instruction + 1 u32 work. This eliminates need 87 * for checking small instructions fitting in given range. 88 * We also (ab)use the fact that ipfw_insn is always the first field 89 * for any custom instruction. 90 */ 91 #define CHECK_CMDLEN CHECK_LENGTH(cblen, F_LEN((ipfw_insn *)cmd)) 92 93 #define GET_UINT_ARG(arg, min, max, tok, s_x) do { \ 94 if (!av[0]) \ 95 errx(EX_USAGE, "%s: missing argument", match_value(s_x, tok)); \ 96 if (_substrcmp(*av, "tablearg") == 0) { \ 97 arg = IP_FW_TARG; \ 98 break; \ 99 } \ 100 \ 101 { \ 102 long _xval; \ 103 char *end; \ 104 \ 105 _xval = strtol(*av, &end, 10); \ 106 \ 107 if (!isdigit(**av) || *end != '\0' || (_xval == 0 && errno == EINVAL)) \ 108 errx(EX_DATAERR, "%s: invalid argument: %s", \ 109 match_value(s_x, tok), *av); \ 110 \ 111 if (errno == ERANGE || _xval < min || _xval > max) \ 112 errx(EX_DATAERR, "%s: argument is out of range (%u..%u): %s", \ 113 match_value(s_x, tok), min, max, *av); \ 114 \ 115 if (_xval == IP_FW_TARG) \ 116 errx(EX_DATAERR, "%s: illegal argument value: %s", \ 117 match_value(s_x, tok), *av); \ 118 arg = _xval; \ 119 } \ 120 } while (0) 121 122 static struct _s_x f_tcpflags[] = { 123 { "syn", TH_SYN }, 124 { "fin", TH_FIN }, 125 { "ack", TH_ACK }, 126 { "psh", TH_PUSH }, 127 { "rst", TH_RST }, 128 { "urg", TH_URG }, 129 { "tcp flag", 0 }, 130 { NULL, 0 } 131 }; 132 133 static struct _s_x f_tcpopts[] = { 134 { "mss", IP_FW_TCPOPT_MSS }, 135 { "maxseg", IP_FW_TCPOPT_MSS }, 136 { "window", IP_FW_TCPOPT_WINDOW }, 137 { "sack", IP_FW_TCPOPT_SACK }, 138 { "ts", IP_FW_TCPOPT_TS }, 139 { "timestamp", IP_FW_TCPOPT_TS }, 140 { "cc", IP_FW_TCPOPT_CC }, 141 { "tcp option", 0 }, 142 { NULL, 0 } 143 }; 144 145 /* 146 * IP options span the range 0 to 255 so we need to remap them 147 * (though in fact only the low 5 bits are significant). 148 */ 149 static struct _s_x f_ipopts[] = { 150 { "ssrr", IP_FW_IPOPT_SSRR}, 151 { "lsrr", IP_FW_IPOPT_LSRR}, 152 { "rr", IP_FW_IPOPT_RR}, 153 { "ts", IP_FW_IPOPT_TS}, 154 { "ip option", 0 }, 155 { NULL, 0 } 156 }; 157 158 static struct _s_x f_iptos[] = { 159 { "lowdelay", IPTOS_LOWDELAY}, 160 { "throughput", IPTOS_THROUGHPUT}, 161 { "reliability", IPTOS_RELIABILITY}, 162 { "mincost", IPTOS_MINCOST}, 163 { "congestion", IPTOS_ECN_CE}, 164 { "ecntransport", IPTOS_ECN_ECT0}, 165 { "ip tos option", 0}, 166 { NULL, 0 } 167 }; 168 169 struct _s_x f_ipdscp[] = { 170 { "af11", IPTOS_DSCP_AF11 >> 2 }, /* 001010 */ 171 { "af12", IPTOS_DSCP_AF12 >> 2 }, /* 001100 */ 172 { "af13", IPTOS_DSCP_AF13 >> 2 }, /* 001110 */ 173 { "af21", IPTOS_DSCP_AF21 >> 2 }, /* 010010 */ 174 { "af22", IPTOS_DSCP_AF22 >> 2 }, /* 010100 */ 175 { "af23", IPTOS_DSCP_AF23 >> 2 }, /* 010110 */ 176 { "af31", IPTOS_DSCP_AF31 >> 2 }, /* 011010 */ 177 { "af32", IPTOS_DSCP_AF32 >> 2 }, /* 011100 */ 178 { "af33", IPTOS_DSCP_AF33 >> 2 }, /* 011110 */ 179 { "af41", IPTOS_DSCP_AF41 >> 2 }, /* 100010 */ 180 { "af42", IPTOS_DSCP_AF42 >> 2 }, /* 100100 */ 181 { "af43", IPTOS_DSCP_AF43 >> 2 }, /* 100110 */ 182 { "be", IPTOS_DSCP_CS0 >> 2 }, /* 000000 */ 183 { "ef", IPTOS_DSCP_EF >> 2 }, /* 101110 */ 184 { "cs0", IPTOS_DSCP_CS0 >> 2 }, /* 000000 */ 185 { "cs1", IPTOS_DSCP_CS1 >> 2 }, /* 001000 */ 186 { "cs2", IPTOS_DSCP_CS2 >> 2 }, /* 010000 */ 187 { "cs3", IPTOS_DSCP_CS3 >> 2 }, /* 011000 */ 188 { "cs4", IPTOS_DSCP_CS4 >> 2 }, /* 100000 */ 189 { "cs5", IPTOS_DSCP_CS5 >> 2 }, /* 101000 */ 190 { "cs6", IPTOS_DSCP_CS6 >> 2 }, /* 110000 */ 191 { "cs7", IPTOS_DSCP_CS7 >> 2 }, /* 100000 */ 192 { NULL, 0 } 193 }; 194 195 static struct _s_x limit_masks[] = { 196 {"all", DYN_SRC_ADDR|DYN_SRC_PORT|DYN_DST_ADDR|DYN_DST_PORT}, 197 {"src-addr", DYN_SRC_ADDR}, 198 {"src-port", DYN_SRC_PORT}, 199 {"dst-addr", DYN_DST_ADDR}, 200 {"dst-port", DYN_DST_PORT}, 201 {NULL, 0} 202 }; 203 204 /* 205 * we use IPPROTO_ETHERTYPE as a fake protocol id to call the print routines 206 * This is only used in this code. 207 */ 208 #define IPPROTO_ETHERTYPE 0x1000 209 static struct _s_x ether_types[] = { 210 /* 211 * Note, we cannot use "-:&/" in the names because they are field 212 * separators in the type specifications. Also, we use s = NULL as 213 * end-delimiter, because a type of 0 can be legal. 214 */ 215 { "ip", 0x0800 }, 216 { "ipv4", 0x0800 }, 217 { "ipv6", 0x86dd }, 218 { "arp", 0x0806 }, 219 { "rarp", 0x8035 }, 220 { "vlan", 0x8100 }, 221 { "loop", 0x9000 }, 222 { "trail", 0x1000 }, 223 { "at", 0x809b }, 224 { "atalk", 0x809b }, 225 { "aarp", 0x80f3 }, 226 { "pppoe_disc", 0x8863 }, 227 { "pppoe_sess", 0x8864 }, 228 { "ipx_8022", 0x00E0 }, 229 { "ipx_8023", 0x0000 }, 230 { "ipx_ii", 0x8137 }, 231 { "ipx_snap", 0x8137 }, 232 { "ipx", 0x8137 }, 233 { "ns", 0x0600 }, 234 { NULL, 0 } 235 }; 236 237 static struct _s_x rule_eactions[] = { 238 { "nptv6", TOK_NPTV6 }, 239 { NULL, 0 } /* terminator */ 240 }; 241 242 static struct _s_x rule_actions[] = { 243 { "accept", TOK_ACCEPT }, 244 { "pass", TOK_ACCEPT }, 245 { "allow", TOK_ACCEPT }, 246 { "permit", TOK_ACCEPT }, 247 { "count", TOK_COUNT }, 248 { "pipe", TOK_PIPE }, 249 { "queue", TOK_QUEUE }, 250 { "divert", TOK_DIVERT }, 251 { "tee", TOK_TEE }, 252 { "netgraph", TOK_NETGRAPH }, 253 { "ngtee", TOK_NGTEE }, 254 { "fwd", TOK_FORWARD }, 255 { "forward", TOK_FORWARD }, 256 { "skipto", TOK_SKIPTO }, 257 { "deny", TOK_DENY }, 258 { "drop", TOK_DENY }, 259 { "reject", TOK_REJECT }, 260 { "reset6", TOK_RESET6 }, 261 { "reset", TOK_RESET }, 262 { "unreach6", TOK_UNREACH6 }, 263 { "unreach", TOK_UNREACH }, 264 { "check-state", TOK_CHECKSTATE }, 265 { "//", TOK_COMMENT }, 266 { "nat", TOK_NAT }, 267 { "reass", TOK_REASS }, 268 { "setfib", TOK_SETFIB }, 269 { "setdscp", TOK_SETDSCP }, 270 { "call", TOK_CALL }, 271 { "return", TOK_RETURN }, 272 { "eaction", TOK_EACTION }, 273 { NULL, 0 } /* terminator */ 274 }; 275 276 static struct _s_x rule_action_params[] = { 277 { "altq", TOK_ALTQ }, 278 { "log", TOK_LOG }, 279 { "tag", TOK_TAG }, 280 { "untag", TOK_UNTAG }, 281 { NULL, 0 } /* terminator */ 282 }; 283 284 /* 285 * The 'lookup' instruction accepts one of the following arguments. 286 * -1 is a terminator for the list. 287 * Arguments are passed as v[1] in O_DST_LOOKUP options. 288 */ 289 static int lookup_key[] = { 290 TOK_DSTIP, TOK_SRCIP, TOK_DSTPORT, TOK_SRCPORT, 291 TOK_UID, TOK_JAIL, TOK_DSCP, -1 }; 292 293 static struct _s_x rule_options[] = { 294 { "tagged", TOK_TAGGED }, 295 { "uid", TOK_UID }, 296 { "gid", TOK_GID }, 297 { "jail", TOK_JAIL }, 298 { "in", TOK_IN }, 299 { "limit", TOK_LIMIT }, 300 { "keep-state", TOK_KEEPSTATE }, 301 { "bridged", TOK_LAYER2 }, 302 { "layer2", TOK_LAYER2 }, 303 { "out", TOK_OUT }, 304 { "diverted", TOK_DIVERTED }, 305 { "diverted-loopback", TOK_DIVERTEDLOOPBACK }, 306 { "diverted-output", TOK_DIVERTEDOUTPUT }, 307 { "xmit", TOK_XMIT }, 308 { "recv", TOK_RECV }, 309 { "via", TOK_VIA }, 310 { "fragment", TOK_FRAG }, 311 { "frag", TOK_FRAG }, 312 { "fib", TOK_FIB }, 313 { "ipoptions", TOK_IPOPTS }, 314 { "ipopts", TOK_IPOPTS }, 315 { "iplen", TOK_IPLEN }, 316 { "ipid", TOK_IPID }, 317 { "ipprecedence", TOK_IPPRECEDENCE }, 318 { "dscp", TOK_DSCP }, 319 { "iptos", TOK_IPTOS }, 320 { "ipttl", TOK_IPTTL }, 321 { "ipversion", TOK_IPVER }, 322 { "ipver", TOK_IPVER }, 323 { "estab", TOK_ESTAB }, 324 { "established", TOK_ESTAB }, 325 { "setup", TOK_SETUP }, 326 { "sockarg", TOK_SOCKARG }, 327 { "tcpdatalen", TOK_TCPDATALEN }, 328 { "tcpflags", TOK_TCPFLAGS }, 329 { "tcpflgs", TOK_TCPFLAGS }, 330 { "tcpoptions", TOK_TCPOPTS }, 331 { "tcpopts", TOK_TCPOPTS }, 332 { "tcpseq", TOK_TCPSEQ }, 333 { "tcpack", TOK_TCPACK }, 334 { "tcpwin", TOK_TCPWIN }, 335 { "icmptype", TOK_ICMPTYPES }, 336 { "icmptypes", TOK_ICMPTYPES }, 337 { "dst-ip", TOK_DSTIP }, 338 { "src-ip", TOK_SRCIP }, 339 { "dst-port", TOK_DSTPORT }, 340 { "src-port", TOK_SRCPORT }, 341 { "proto", TOK_PROTO }, 342 { "MAC", TOK_MAC }, 343 { "mac", TOK_MAC }, 344 { "mac-type", TOK_MACTYPE }, 345 { "verrevpath", TOK_VERREVPATH }, 346 { "versrcreach", TOK_VERSRCREACH }, 347 { "antispoof", TOK_ANTISPOOF }, 348 { "ipsec", TOK_IPSEC }, 349 { "icmp6type", TOK_ICMP6TYPES }, 350 { "icmp6types", TOK_ICMP6TYPES }, 351 { "ext6hdr", TOK_EXT6HDR}, 352 { "flow-id", TOK_FLOWID}, 353 { "ipv6", TOK_IPV6}, 354 { "ip6", TOK_IPV6}, 355 { "ipv4", TOK_IPV4}, 356 { "ip4", TOK_IPV4}, 357 { "dst-ipv6", TOK_DSTIP6}, 358 { "dst-ip6", TOK_DSTIP6}, 359 { "src-ipv6", TOK_SRCIP6}, 360 { "src-ip6", TOK_SRCIP6}, 361 { "lookup", TOK_LOOKUP}, 362 { "flow", TOK_FLOW}, 363 { "//", TOK_COMMENT }, 364 365 { "not", TOK_NOT }, /* pseudo option */ 366 { "!", /* escape ? */ TOK_NOT }, /* pseudo option */ 367 { "or", TOK_OR }, /* pseudo option */ 368 { "|", /* escape */ TOK_OR }, /* pseudo option */ 369 { "{", TOK_STARTBRACE }, /* pseudo option */ 370 { "(", TOK_STARTBRACE }, /* pseudo option */ 371 { "}", TOK_ENDBRACE }, /* pseudo option */ 372 { ")", TOK_ENDBRACE }, /* pseudo option */ 373 { NULL, 0 } /* terminator */ 374 }; 375 376 void bprint_uint_arg(struct buf_pr *bp, const char *str, uint32_t arg); 377 static int ipfw_get_config(struct cmdline_opts *co, struct format_opts *fo, 378 ipfw_cfg_lheader **pcfg, size_t *psize); 379 static int ipfw_show_config(struct cmdline_opts *co, struct format_opts *fo, 380 ipfw_cfg_lheader *cfg, size_t sz, int ac, char **av); 381 static void ipfw_list_tifaces(void); 382 383 struct tidx; 384 static uint16_t pack_object(struct tidx *tstate, char *name, int otype); 385 static uint16_t pack_table(struct tidx *tstate, char *name); 386 387 static char *table_search_ctlv(ipfw_obj_ctlv *ctlv, uint16_t idx); 388 static void object_sort_ctlv(ipfw_obj_ctlv *ctlv); 389 static char *object_search_ctlv(ipfw_obj_ctlv *ctlv, uint16_t idx, 390 uint16_t type); 391 392 /* 393 * Simple string buffer API. 394 * Used to simplify buffer passing between function and for 395 * transparent overrun handling. 396 */ 397 398 /* 399 * Allocates new buffer of given size @sz. 400 * 401 * Returns 0 on success. 402 */ 403 int 404 bp_alloc(struct buf_pr *b, size_t size) 405 { 406 memset(b, 0, sizeof(struct buf_pr)); 407 408 if ((b->buf = calloc(1, size)) == NULL) 409 return (ENOMEM); 410 411 b->ptr = b->buf; 412 b->size = size; 413 b->avail = b->size; 414 415 return (0); 416 } 417 418 void 419 bp_free(struct buf_pr *b) 420 { 421 422 free(b->buf); 423 } 424 425 /* 426 * Flushes buffer so new writer start from beginning. 427 */ 428 void 429 bp_flush(struct buf_pr *b) 430 { 431 432 b->ptr = b->buf; 433 b->avail = b->size; 434 b->buf[0] = '\0'; 435 } 436 437 /* 438 * Print message specified by @format and args. 439 * Automatically manage buffer space and transparently handle 440 * buffer overruns. 441 * 442 * Returns number of bytes that should have been printed. 443 */ 444 int 445 bprintf(struct buf_pr *b, char *format, ...) 446 { 447 va_list args; 448 int i; 449 450 va_start(args, format); 451 452 i = vsnprintf(b->ptr, b->avail, format, args); 453 va_end(args); 454 455 if (i > b->avail || i < 0) { 456 /* Overflow or print error */ 457 b->avail = 0; 458 } else { 459 b->ptr += i; 460 b->avail -= i; 461 } 462 463 b->needed += i; 464 465 return (i); 466 } 467 468 /* 469 * Special values printer for tablearg-aware opcodes. 470 */ 471 void 472 bprint_uint_arg(struct buf_pr *bp, const char *str, uint32_t arg) 473 { 474 475 if (str != NULL) 476 bprintf(bp, "%s", str); 477 if (arg == IP_FW_TARG) 478 bprintf(bp, "tablearg"); 479 else 480 bprintf(bp, "%u", arg); 481 } 482 483 /* 484 * Helper routine to print a possibly unaligned uint64_t on 485 * various platform. If width > 0, print the value with 486 * the desired width, followed by a space; 487 * otherwise, return the required width. 488 */ 489 int 490 pr_u64(struct buf_pr *b, uint64_t *pd, int width) 491 { 492 #ifdef TCC 493 #define U64_FMT "I64" 494 #else 495 #define U64_FMT "llu" 496 #endif 497 uint64_t u; 498 unsigned long long d; 499 500 bcopy (pd, &u, sizeof(u)); 501 d = u; 502 return (width > 0) ? 503 bprintf(b, "%*" U64_FMT " ", width, d) : 504 snprintf(NULL, 0, "%" U64_FMT, d) ; 505 #undef U64_FMT 506 } 507 508 509 void * 510 safe_calloc(size_t number, size_t size) 511 { 512 void *ret = calloc(number, size); 513 514 if (ret == NULL) 515 err(EX_OSERR, "calloc"); 516 return ret; 517 } 518 519 void * 520 safe_realloc(void *ptr, size_t size) 521 { 522 void *ret = realloc(ptr, size); 523 524 if (ret == NULL) 525 err(EX_OSERR, "realloc"); 526 return ret; 527 } 528 529 /* 530 * Compare things like interface or table names. 531 */ 532 int 533 stringnum_cmp(const char *a, const char *b) 534 { 535 int la, lb; 536 537 la = strlen(a); 538 lb = strlen(b); 539 540 if (la > lb) 541 return (1); 542 else if (la < lb) 543 return (-01); 544 545 return (strcmp(a, b)); 546 } 547 548 549 /* 550 * conditionally runs the command. 551 * Selected options or negative -> getsockopt 552 */ 553 int 554 do_cmd(int optname, void *optval, uintptr_t optlen) 555 { 556 int i; 557 558 if (co.test_only) 559 return 0; 560 561 if (ipfw_socket == -1) 562 ipfw_socket = socket(AF_INET, SOCK_RAW, IPPROTO_RAW); 563 if (ipfw_socket < 0) 564 err(EX_UNAVAILABLE, "socket"); 565 566 if (optname == IP_FW_GET || optname == IP_DUMMYNET_GET || 567 optname == IP_FW_ADD || optname == IP_FW3 || 568 optname == IP_FW_NAT_GET_CONFIG || 569 optname < 0 || 570 optname == IP_FW_NAT_GET_LOG) { 571 if (optname < 0) 572 optname = -optname; 573 i = getsockopt(ipfw_socket, IPPROTO_IP, optname, optval, 574 (socklen_t *)optlen); 575 } else { 576 i = setsockopt(ipfw_socket, IPPROTO_IP, optname, optval, optlen); 577 } 578 return i; 579 } 580 581 /* 582 * do_set3 - pass ipfw control cmd to kernel 583 * @optname: option name 584 * @optval: pointer to option data 585 * @optlen: option length 586 * 587 * Assumes op3 header is already embedded. 588 * Calls setsockopt() with IP_FW3 as kernel-visible opcode. 589 * Returns 0 on success or errno otherwise. 590 */ 591 int 592 do_set3(int optname, ip_fw3_opheader *op3, uintptr_t optlen) 593 { 594 595 if (co.test_only) 596 return (0); 597 598 if (ipfw_socket == -1) 599 ipfw_socket = socket(AF_INET, SOCK_RAW, IPPROTO_RAW); 600 if (ipfw_socket < 0) 601 err(EX_UNAVAILABLE, "socket"); 602 603 op3->opcode = optname; 604 605 return (setsockopt(ipfw_socket, IPPROTO_IP, IP_FW3, op3, optlen)); 606 } 607 608 /* 609 * do_get3 - pass ipfw control cmd to kernel 610 * @optname: option name 611 * @optval: pointer to option data 612 * @optlen: pointer to option length 613 * 614 * Assumes op3 header is already embedded. 615 * Calls getsockopt() with IP_FW3 as kernel-visible opcode. 616 * Returns 0 on success or errno otherwise. 617 */ 618 int 619 do_get3(int optname, ip_fw3_opheader *op3, size_t *optlen) 620 { 621 int error; 622 623 if (co.test_only) 624 return (0); 625 626 if (ipfw_socket == -1) 627 ipfw_socket = socket(AF_INET, SOCK_RAW, IPPROTO_RAW); 628 if (ipfw_socket < 0) 629 err(EX_UNAVAILABLE, "socket"); 630 631 op3->opcode = optname; 632 633 error = getsockopt(ipfw_socket, IPPROTO_IP, IP_FW3, op3, 634 (socklen_t *)optlen); 635 636 return (error); 637 } 638 639 /** 640 * match_token takes a table and a string, returns the value associated 641 * with the string (-1 in case of failure). 642 */ 643 int 644 match_token(struct _s_x *table, const char *string) 645 { 646 struct _s_x *pt; 647 uint i = strlen(string); 648 649 for (pt = table ; i && pt->s != NULL ; pt++) 650 if (strlen(pt->s) == i && !bcmp(string, pt->s, i)) 651 return pt->x; 652 return (-1); 653 } 654 655 /** 656 * match_token_relaxed takes a table and a string, returns the value associated 657 * with the string for the best match. 658 * 659 * Returns: 660 * value from @table for matched records 661 * -1 for non-matched records 662 * -2 if more than one records match @string. 663 */ 664 int 665 match_token_relaxed(struct _s_x *table, const char *string) 666 { 667 struct _s_x *pt, *m; 668 int i, c; 669 670 i = strlen(string); 671 c = 0; 672 673 for (pt = table ; i != 0 && pt->s != NULL ; pt++) { 674 if (strncmp(pt->s, string, i) != 0) 675 continue; 676 m = pt; 677 c++; 678 } 679 680 if (c == 1) 681 return (m->x); 682 683 return (c > 0 ? -2: -1); 684 } 685 686 int 687 get_token(struct _s_x *table, const char *string, const char *errbase) 688 { 689 int tcmd; 690 691 if ((tcmd = match_token_relaxed(table, string)) < 0) 692 errx(EX_USAGE, "%s %s %s", 693 (tcmd == 0) ? "invalid" : "ambiguous", errbase, string); 694 695 return (tcmd); 696 } 697 698 /** 699 * match_value takes a table and a value, returns the string associated 700 * with the value (NULL in case of failure). 701 */ 702 char const * 703 match_value(struct _s_x *p, int value) 704 { 705 for (; p->s != NULL; p++) 706 if (p->x == value) 707 return p->s; 708 return NULL; 709 } 710 711 size_t 712 concat_tokens(char *buf, size_t bufsize, struct _s_x *table, char *delimiter) 713 { 714 struct _s_x *pt; 715 int l; 716 size_t sz; 717 718 for (sz = 0, pt = table ; pt->s != NULL; pt++) { 719 l = snprintf(buf + sz, bufsize - sz, "%s%s", 720 (sz == 0) ? "" : delimiter, pt->s); 721 sz += l; 722 bufsize += l; 723 if (sz > bufsize) 724 return (bufsize); 725 } 726 727 return (sz); 728 } 729 730 /* 731 * helper function to process a set of flags and set bits in the 732 * appropriate masks. 733 */ 734 int 735 fill_flags(struct _s_x *flags, char *p, char **e, uint32_t *set, 736 uint32_t *clear) 737 { 738 char *q; /* points to the separator */ 739 int val; 740 uint32_t *which; /* mask we are working on */ 741 742 while (p && *p) { 743 if (*p == '!') { 744 p++; 745 which = clear; 746 } else 747 which = set; 748 q = strchr(p, ','); 749 if (q) 750 *q++ = '\0'; 751 val = match_token(flags, p); 752 if (val <= 0) { 753 if (e != NULL) 754 *e = p; 755 return (-1); 756 } 757 *which |= (uint32_t)val; 758 p = q; 759 } 760 return (0); 761 } 762 763 void 764 print_flags_buffer(char *buf, size_t sz, struct _s_x *list, uint32_t set) 765 { 766 char const *comma = ""; 767 int i, l; 768 769 for (i = 0; list[i].x != 0; i++) { 770 if ((set & list[i].x) == 0) 771 continue; 772 773 set &= ~list[i].x; 774 l = snprintf(buf, sz, "%s%s", comma, list[i].s); 775 if (l >= sz) 776 return; 777 comma = ","; 778 buf += l; 779 sz -=l; 780 } 781 } 782 783 /* 784 * _substrcmp takes two strings and returns 1 if they do not match, 785 * and 0 if they match exactly or the first string is a sub-string 786 * of the second. A warning is printed to stderr in the case that the 787 * first string is a sub-string of the second. 788 * 789 * This function will be removed in the future through the usual 790 * deprecation process. 791 */ 792 int 793 _substrcmp(const char *str1, const char* str2) 794 { 795 796 if (strncmp(str1, str2, strlen(str1)) != 0) 797 return 1; 798 799 if (strlen(str1) != strlen(str2)) 800 warnx("DEPRECATED: '%s' matched '%s' as a sub-string", 801 str1, str2); 802 return 0; 803 } 804 805 /* 806 * _substrcmp2 takes three strings and returns 1 if the first two do not match, 807 * and 0 if they match exactly or the second string is a sub-string 808 * of the first. A warning is printed to stderr in the case that the 809 * first string does not match the third. 810 * 811 * This function exists to warn about the bizarre construction 812 * strncmp(str, "by", 2) which is used to allow people to use a shortcut 813 * for "bytes". The problem is that in addition to accepting "by", 814 * "byt", "byte", and "bytes", it also excepts "by_rabid_dogs" and any 815 * other string beginning with "by". 816 * 817 * This function will be removed in the future through the usual 818 * deprecation process. 819 */ 820 int 821 _substrcmp2(const char *str1, const char* str2, const char* str3) 822 { 823 824 if (strncmp(str1, str2, strlen(str2)) != 0) 825 return 1; 826 827 if (strcmp(str1, str3) != 0) 828 warnx("DEPRECATED: '%s' matched '%s'", 829 str1, str3); 830 return 0; 831 } 832 833 /* 834 * prints one port, symbolic or numeric 835 */ 836 static void 837 print_port(struct buf_pr *bp, int proto, uint16_t port) 838 { 839 840 if (proto == IPPROTO_ETHERTYPE) { 841 char const *s; 842 843 if (co.do_resolv && (s = match_value(ether_types, port)) ) 844 bprintf(bp, "%s", s); 845 else 846 bprintf(bp, "0x%04x", port); 847 } else { 848 struct servent *se = NULL; 849 if (co.do_resolv) { 850 struct protoent *pe = getprotobynumber(proto); 851 852 se = getservbyport(htons(port), pe ? pe->p_name : NULL); 853 } 854 if (se) 855 bprintf(bp, "%s", se->s_name); 856 else 857 bprintf(bp, "%d", port); 858 } 859 } 860 861 static struct _s_x _port_name[] = { 862 {"dst-port", O_IP_DSTPORT}, 863 {"src-port", O_IP_SRCPORT}, 864 {"ipid", O_IPID}, 865 {"iplen", O_IPLEN}, 866 {"ipttl", O_IPTTL}, 867 {"mac-type", O_MAC_TYPE}, 868 {"tcpdatalen", O_TCPDATALEN}, 869 {"tcpwin", O_TCPWIN}, 870 {"tagged", O_TAGGED}, 871 {NULL, 0} 872 }; 873 874 /* 875 * Print the values in a list 16-bit items of the types above. 876 * XXX todo: add support for mask. 877 */ 878 static void 879 print_newports(struct buf_pr *bp, ipfw_insn_u16 *cmd, int proto, int opcode) 880 { 881 uint16_t *p = cmd->ports; 882 int i; 883 char const *sep; 884 885 if (opcode != 0) { 886 sep = match_value(_port_name, opcode); 887 if (sep == NULL) 888 sep = "???"; 889 bprintf(bp, " %s", sep); 890 } 891 sep = " "; 892 for (i = F_LEN((ipfw_insn *)cmd) - 1; i > 0; i--, p += 2) { 893 bprintf(bp, "%s", sep); 894 print_port(bp, proto, p[0]); 895 if (p[0] != p[1]) { 896 bprintf(bp, "-"); 897 print_port(bp, proto, p[1]); 898 } 899 sep = ","; 900 } 901 } 902 903 /* 904 * Like strtol, but also translates service names into port numbers 905 * for some protocols. 906 * In particular: 907 * proto == -1 disables the protocol check; 908 * proto == IPPROTO_ETHERTYPE looks up an internal table 909 * proto == <some value in /etc/protocols> matches the values there. 910 * Returns *end == s in case the parameter is not found. 911 */ 912 static int 913 strtoport(char *s, char **end, int base, int proto) 914 { 915 char *p, *buf; 916 char *s1; 917 int i; 918 919 *end = s; /* default - not found */ 920 if (*s == '\0') 921 return 0; /* not found */ 922 923 if (isdigit(*s)) 924 return strtol(s, end, base); 925 926 /* 927 * find separator. '\\' escapes the next char. 928 */ 929 for (s1 = s; *s1 && (isalnum(*s1) || *s1 == '\\') ; s1++) 930 if (*s1 == '\\' && s1[1] != '\0') 931 s1++; 932 933 buf = safe_calloc(s1 - s + 1, 1); 934 935 /* 936 * copy into a buffer skipping backslashes 937 */ 938 for (p = s, i = 0; p != s1 ; p++) 939 if (*p != '\\') 940 buf[i++] = *p; 941 buf[i++] = '\0'; 942 943 if (proto == IPPROTO_ETHERTYPE) { 944 i = match_token(ether_types, buf); 945 free(buf); 946 if (i != -1) { /* found */ 947 *end = s1; 948 return i; 949 } 950 } else { 951 struct protoent *pe = NULL; 952 struct servent *se; 953 954 if (proto != 0) 955 pe = getprotobynumber(proto); 956 setservent(1); 957 se = getservbyname(buf, pe ? pe->p_name : NULL); 958 free(buf); 959 if (se != NULL) { 960 *end = s1; 961 return ntohs(se->s_port); 962 } 963 } 964 return 0; /* not found */ 965 } 966 967 /* 968 * Fill the body of the command with the list of port ranges. 969 */ 970 static int 971 fill_newports(ipfw_insn_u16 *cmd, char *av, int proto, int cblen) 972 { 973 uint16_t a, b, *p = cmd->ports; 974 int i = 0; 975 char *s = av; 976 977 while (*s) { 978 a = strtoport(av, &s, 0, proto); 979 if (s == av) /* empty or invalid argument */ 980 return (0); 981 982 CHECK_LENGTH(cblen, i + 2); 983 984 switch (*s) { 985 case '-': /* a range */ 986 av = s + 1; 987 b = strtoport(av, &s, 0, proto); 988 /* Reject expressions like '1-abc' or '1-2-3'. */ 989 if (s == av || (*s != ',' && *s != '\0')) 990 return (0); 991 p[0] = a; 992 p[1] = b; 993 break; 994 case ',': /* comma separated list */ 995 case '\0': 996 p[0] = p[1] = a; 997 break; 998 default: 999 warnx("port list: invalid separator <%c> in <%s>", 1000 *s, av); 1001 return (0); 1002 } 1003 1004 i++; 1005 p += 2; 1006 av = s + 1; 1007 } 1008 if (i > 0) { 1009 if (i + 1 > F_LEN_MASK) 1010 errx(EX_DATAERR, "too many ports/ranges\n"); 1011 cmd->o.len |= i + 1; /* leave F_NOT and F_OR untouched */ 1012 } 1013 return (i); 1014 } 1015 1016 /* 1017 * Fill the body of the command with the list of DiffServ codepoints. 1018 */ 1019 static void 1020 fill_dscp(ipfw_insn *cmd, char *av, int cblen) 1021 { 1022 uint32_t *low, *high; 1023 char *s = av, *a; 1024 int code; 1025 1026 cmd->opcode = O_DSCP; 1027 cmd->len |= F_INSN_SIZE(ipfw_insn_u32) + 1; 1028 1029 CHECK_CMDLEN; 1030 1031 low = (uint32_t *)(cmd + 1); 1032 high = low + 1; 1033 1034 *low = 0; 1035 *high = 0; 1036 1037 while (s != NULL) { 1038 a = strchr(s, ','); 1039 1040 if (a != NULL) 1041 *a++ = '\0'; 1042 1043 if (isalpha(*s)) { 1044 if ((code = match_token(f_ipdscp, s)) == -1) 1045 errx(EX_DATAERR, "Unknown DSCP code"); 1046 } else { 1047 code = strtoul(s, NULL, 10); 1048 if (code < 0 || code > 63) 1049 errx(EX_DATAERR, "Invalid DSCP value"); 1050 } 1051 1052 if (code >= 32) 1053 *high |= 1 << (code - 32); 1054 else 1055 *low |= 1 << code; 1056 1057 s = a; 1058 } 1059 } 1060 1061 static struct _s_x icmpcodes[] = { 1062 { "net", ICMP_UNREACH_NET }, 1063 { "host", ICMP_UNREACH_HOST }, 1064 { "protocol", ICMP_UNREACH_PROTOCOL }, 1065 { "port", ICMP_UNREACH_PORT }, 1066 { "needfrag", ICMP_UNREACH_NEEDFRAG }, 1067 { "srcfail", ICMP_UNREACH_SRCFAIL }, 1068 { "net-unknown", ICMP_UNREACH_NET_UNKNOWN }, 1069 { "host-unknown", ICMP_UNREACH_HOST_UNKNOWN }, 1070 { "isolated", ICMP_UNREACH_ISOLATED }, 1071 { "net-prohib", ICMP_UNREACH_NET_PROHIB }, 1072 { "host-prohib", ICMP_UNREACH_HOST_PROHIB }, 1073 { "tosnet", ICMP_UNREACH_TOSNET }, 1074 { "toshost", ICMP_UNREACH_TOSHOST }, 1075 { "filter-prohib", ICMP_UNREACH_FILTER_PROHIB }, 1076 { "host-precedence", ICMP_UNREACH_HOST_PRECEDENCE }, 1077 { "precedence-cutoff", ICMP_UNREACH_PRECEDENCE_CUTOFF }, 1078 { NULL, 0 } 1079 }; 1080 1081 static void 1082 fill_reject_code(u_short *codep, char *str) 1083 { 1084 int val; 1085 char *s; 1086 1087 val = strtoul(str, &s, 0); 1088 if (s == str || *s != '\0' || val >= 0x100) 1089 val = match_token(icmpcodes, str); 1090 if (val < 0) 1091 errx(EX_DATAERR, "unknown ICMP unreachable code ``%s''", str); 1092 *codep = val; 1093 return; 1094 } 1095 1096 static void 1097 print_reject_code(struct buf_pr *bp, uint16_t code) 1098 { 1099 char const *s; 1100 1101 if ((s = match_value(icmpcodes, code)) != NULL) 1102 bprintf(bp, "unreach %s", s); 1103 else 1104 bprintf(bp, "unreach %u", code); 1105 } 1106 1107 /* 1108 * Returns the number of bits set (from left) in a contiguous bitmask, 1109 * or -1 if the mask is not contiguous. 1110 * XXX this needs a proper fix. 1111 * This effectively works on masks in big-endian (network) format. 1112 * when compiled on little endian architectures. 1113 * 1114 * First bit is bit 7 of the first byte -- note, for MAC addresses, 1115 * the first bit on the wire is bit 0 of the first byte. 1116 * len is the max length in bits. 1117 */ 1118 int 1119 contigmask(uint8_t *p, int len) 1120 { 1121 int i, n; 1122 1123 for (i=0; i<len ; i++) 1124 if ( (p[i/8] & (1 << (7 - (i%8)))) == 0) /* first bit unset */ 1125 break; 1126 for (n=i+1; n < len; n++) 1127 if ( (p[n/8] & (1 << (7 - (n%8)))) != 0) 1128 return -1; /* mask not contiguous */ 1129 return i; 1130 } 1131 1132 /* 1133 * print flags set/clear in the two bitmasks passed as parameters. 1134 * There is a specialized check for f_tcpflags. 1135 */ 1136 static void 1137 print_flags(struct buf_pr *bp, char const *name, ipfw_insn *cmd, 1138 struct _s_x *list) 1139 { 1140 char const *comma = ""; 1141 int i; 1142 uint8_t set = cmd->arg1 & 0xff; 1143 uint8_t clear = (cmd->arg1 >> 8) & 0xff; 1144 1145 if (list == f_tcpflags && set == TH_SYN && clear == TH_ACK) { 1146 bprintf(bp, " setup"); 1147 return; 1148 } 1149 1150 bprintf(bp, " %s ", name); 1151 for (i=0; list[i].x != 0; i++) { 1152 if (set & list[i].x) { 1153 set &= ~list[i].x; 1154 bprintf(bp, "%s%s", comma, list[i].s); 1155 comma = ","; 1156 } 1157 if (clear & list[i].x) { 1158 clear &= ~list[i].x; 1159 bprintf(bp, "%s!%s", comma, list[i].s); 1160 comma = ","; 1161 } 1162 } 1163 } 1164 1165 1166 /* 1167 * Print the ip address contained in a command. 1168 */ 1169 static void 1170 print_ip(struct buf_pr *bp, struct format_opts *fo, ipfw_insn_ip *cmd, 1171 char const *s) 1172 { 1173 struct hostent *he = NULL; 1174 struct in_addr *ia; 1175 uint32_t len = F_LEN((ipfw_insn *)cmd); 1176 uint32_t *a = ((ipfw_insn_u32 *)cmd)->d; 1177 char *t; 1178 1179 if (cmd->o.opcode == O_IP_DST_LOOKUP && len > F_INSN_SIZE(ipfw_insn_u32)) { 1180 uint32_t d = a[1]; 1181 const char *arg = "<invalid>"; 1182 1183 if (d < sizeof(lookup_key)/sizeof(lookup_key[0])) 1184 arg = match_value(rule_options, lookup_key[d]); 1185 t = table_search_ctlv(fo->tstate, ((ipfw_insn *)cmd)->arg1); 1186 bprintf(bp, "%s lookup %s %s", cmd->o.len & F_NOT ? " not": "", 1187 arg, t); 1188 return; 1189 } 1190 bprintf(bp, "%s%s ", cmd->o.len & F_NOT ? " not": "", s); 1191 1192 if (cmd->o.opcode == O_IP_SRC_ME || cmd->o.opcode == O_IP_DST_ME) { 1193 bprintf(bp, "me"); 1194 return; 1195 } 1196 if (cmd->o.opcode == O_IP_SRC_LOOKUP || 1197 cmd->o.opcode == O_IP_DST_LOOKUP) { 1198 t = table_search_ctlv(fo->tstate, ((ipfw_insn *)cmd)->arg1); 1199 bprintf(bp, "table(%s", t); 1200 if (len == F_INSN_SIZE(ipfw_insn_u32)) 1201 bprintf(bp, ",%u", *a); 1202 bprintf(bp, ")"); 1203 return; 1204 } 1205 if (cmd->o.opcode == O_IP_SRC_SET || cmd->o.opcode == O_IP_DST_SET) { 1206 uint32_t x, *map = (uint32_t *)&(cmd->mask); 1207 int i, j; 1208 char comma = '{'; 1209 1210 x = cmd->o.arg1 - 1; 1211 x = htonl( ~x ); 1212 cmd->addr.s_addr = htonl(cmd->addr.s_addr); 1213 bprintf(bp, "%s/%d", inet_ntoa(cmd->addr), 1214 contigmask((uint8_t *)&x, 32)); 1215 x = cmd->addr.s_addr = htonl(cmd->addr.s_addr); 1216 x &= 0xff; /* base */ 1217 /* 1218 * Print bits and ranges. 1219 * Locate first bit set (i), then locate first bit unset (j). 1220 * If we have 3+ consecutive bits set, then print them as a 1221 * range, otherwise only print the initial bit and rescan. 1222 */ 1223 for (i=0; i < cmd->o.arg1; i++) 1224 if (map[i/32] & (1<<(i & 31))) { 1225 for (j=i+1; j < cmd->o.arg1; j++) 1226 if (!(map[ j/32] & (1<<(j & 31)))) 1227 break; 1228 bprintf(bp, "%c%d", comma, i+x); 1229 if (j>i+2) { /* range has at least 3 elements */ 1230 bprintf(bp, "-%d", j-1+x); 1231 i = j-1; 1232 } 1233 comma = ','; 1234 } 1235 bprintf(bp, "}"); 1236 return; 1237 } 1238 /* 1239 * len == 2 indicates a single IP, whereas lists of 1 or more 1240 * addr/mask pairs have len = (2n+1). We convert len to n so we 1241 * use that to count the number of entries. 1242 */ 1243 for (len = len / 2; len > 0; len--, a += 2) { 1244 int mb = /* mask length */ 1245 (cmd->o.opcode == O_IP_SRC || cmd->o.opcode == O_IP_DST) ? 1246 32 : contigmask((uint8_t *)&(a[1]), 32); 1247 if (mb == 32 && co.do_resolv) 1248 he = gethostbyaddr((char *)&(a[0]), sizeof(u_long), AF_INET); 1249 if (he != NULL) /* resolved to name */ 1250 bprintf(bp, "%s", he->h_name); 1251 else if (mb == 0) /* any */ 1252 bprintf(bp, "any"); 1253 else { /* numeric IP followed by some kind of mask */ 1254 ia = (struct in_addr *)&a[0]; 1255 bprintf(bp, "%s", inet_ntoa(*ia)); 1256 if (mb < 0) { 1257 ia = (struct in_addr *)&a[1]; 1258 bprintf(bp, ":%s", inet_ntoa(*ia)); 1259 } else if (mb < 32) 1260 bprintf(bp, "/%d", mb); 1261 } 1262 if (len > 1) 1263 bprintf(bp, ","); 1264 } 1265 } 1266 1267 /* 1268 * prints a MAC address/mask pair 1269 */ 1270 static void 1271 print_mac(struct buf_pr *bp, uint8_t *addr, uint8_t *mask) 1272 { 1273 int l = contigmask(mask, 48); 1274 1275 if (l == 0) 1276 bprintf(bp, " any"); 1277 else { 1278 bprintf(bp, " %02x:%02x:%02x:%02x:%02x:%02x", 1279 addr[0], addr[1], addr[2], addr[3], addr[4], addr[5]); 1280 if (l == -1) 1281 bprintf(bp, "&%02x:%02x:%02x:%02x:%02x:%02x", 1282 mask[0], mask[1], mask[2], 1283 mask[3], mask[4], mask[5]); 1284 else if (l < 48) 1285 bprintf(bp, "/%d", l); 1286 } 1287 } 1288 1289 static void 1290 fill_icmptypes(ipfw_insn_u32 *cmd, char *av) 1291 { 1292 uint8_t type; 1293 1294 cmd->d[0] = 0; 1295 while (*av) { 1296 if (*av == ',') 1297 av++; 1298 1299 type = strtoul(av, &av, 0); 1300 1301 if (*av != ',' && *av != '\0') 1302 errx(EX_DATAERR, "invalid ICMP type"); 1303 1304 if (type > 31) 1305 errx(EX_DATAERR, "ICMP type out of range"); 1306 1307 cmd->d[0] |= 1 << type; 1308 } 1309 cmd->o.opcode = O_ICMPTYPE; 1310 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32); 1311 } 1312 1313 static void 1314 print_icmptypes(struct buf_pr *bp, ipfw_insn_u32 *cmd) 1315 { 1316 int i; 1317 char sep= ' '; 1318 1319 bprintf(bp, " icmptypes"); 1320 for (i = 0; i < 32; i++) { 1321 if ( (cmd->d[0] & (1 << (i))) == 0) 1322 continue; 1323 bprintf(bp, "%c%d", sep, i); 1324 sep = ','; 1325 } 1326 } 1327 1328 static void 1329 print_dscp(struct buf_pr *bp, ipfw_insn_u32 *cmd) 1330 { 1331 int i = 0; 1332 uint32_t *v; 1333 char sep= ' '; 1334 const char *code; 1335 1336 bprintf(bp, " dscp"); 1337 v = cmd->d; 1338 while (i < 64) { 1339 if (*v & (1 << i)) { 1340 if ((code = match_value(f_ipdscp, i)) != NULL) 1341 bprintf(bp, "%c%s", sep, code); 1342 else 1343 bprintf(bp, "%c%d", sep, i); 1344 sep = ','; 1345 } 1346 1347 if ((++i % 32) == 0) 1348 v++; 1349 } 1350 } 1351 1352 /* 1353 * show_ipfw() prints the body of an ipfw rule. 1354 * Because the standard rule has at least proto src_ip dst_ip, we use 1355 * a helper function to produce these entries if not provided explicitly. 1356 * The first argument is the list of fields we have, the second is 1357 * the list of fields we want to be printed. 1358 * 1359 * Special cases if we have provided a MAC header: 1360 * + if the rule does not contain IP addresses/ports, do not print them; 1361 * + if the rule does not contain an IP proto, print "all" instead of "ip"; 1362 * 1363 * Once we have 'have_options', IP header fields are printed as options. 1364 */ 1365 #define HAVE_PROTO 0x0001 1366 #define HAVE_SRCIP 0x0002 1367 #define HAVE_DSTIP 0x0004 1368 #define HAVE_PROTO4 0x0008 1369 #define HAVE_PROTO6 0x0010 1370 #define HAVE_IP 0x0100 1371 #define HAVE_OPTIONS 0x8000 1372 1373 static void 1374 show_prerequisites(struct buf_pr *bp, int *flags, int want, int cmd) 1375 { 1376 (void)cmd; /* UNUSED */ 1377 if (co.comment_only) 1378 return; 1379 if ( (*flags & HAVE_IP) == HAVE_IP) 1380 *flags |= HAVE_OPTIONS; 1381 1382 if ( !(*flags & HAVE_OPTIONS)) { 1383 if ( !(*flags & HAVE_PROTO) && (want & HAVE_PROTO)) { 1384 if ( (*flags & HAVE_PROTO4)) 1385 bprintf(bp, " ip4"); 1386 else if ( (*flags & HAVE_PROTO6)) 1387 bprintf(bp, " ip6"); 1388 else 1389 bprintf(bp, " ip"); 1390 } 1391 if ( !(*flags & HAVE_SRCIP) && (want & HAVE_SRCIP)) 1392 bprintf(bp, " from any"); 1393 if ( !(*flags & HAVE_DSTIP) && (want & HAVE_DSTIP)) 1394 bprintf(bp, " to any"); 1395 } 1396 *flags |= want; 1397 } 1398 1399 static void 1400 show_static_rule(struct cmdline_opts *co, struct format_opts *fo, 1401 struct buf_pr *bp, struct ip_fw_rule *rule, struct ip_fw_bcounter *cntr) 1402 { 1403 static int twidth = 0; 1404 int l; 1405 ipfw_insn *cmd, *has_eaction = NULL, *tagptr = NULL; 1406 const char *comment = NULL; /* ptr to comment if we have one */ 1407 const char *ename; 1408 int proto = 0; /* default */ 1409 int flags = 0; /* prerequisites */ 1410 ipfw_insn_log *logptr = NULL; /* set if we find an O_LOG */ 1411 ipfw_insn_altq *altqptr = NULL; /* set if we find an O_ALTQ */ 1412 int or_block = 0; /* we are in an or block */ 1413 uint32_t uval; 1414 1415 if ((fo->set_mask & (1 << rule->set)) == 0) { 1416 /* disabled mask */ 1417 if (!co->show_sets) 1418 return; 1419 else 1420 bprintf(bp, "# DISABLED "); 1421 } 1422 bprintf(bp, "%05u ", rule->rulenum); 1423 1424 /* Print counters if enabled */ 1425 if (fo->pcwidth > 0 || fo->bcwidth > 0) { 1426 pr_u64(bp, &cntr->pcnt, fo->pcwidth); 1427 pr_u64(bp, &cntr->bcnt, fo->bcwidth); 1428 } 1429 1430 if (co->do_time == 2) 1431 bprintf(bp, "%10u ", cntr->timestamp); 1432 else if (co->do_time == 1) { 1433 char timestr[30]; 1434 time_t t = (time_t)0; 1435 1436 if (twidth == 0) { 1437 strcpy(timestr, ctime(&t)); 1438 *strchr(timestr, '\n') = '\0'; 1439 twidth = strlen(timestr); 1440 } 1441 if (cntr->timestamp > 0) { 1442 t = _long_to_time(cntr->timestamp); 1443 1444 strcpy(timestr, ctime(&t)); 1445 *strchr(timestr, '\n') = '\0'; 1446 bprintf(bp, "%s ", timestr); 1447 } else { 1448 bprintf(bp, "%*s", twidth, " "); 1449 } 1450 } 1451 1452 if (co->show_sets) 1453 bprintf(bp, "set %d ", rule->set); 1454 1455 /* 1456 * print the optional "match probability" 1457 */ 1458 if (rule->cmd_len > 0) { 1459 cmd = rule->cmd ; 1460 if (cmd->opcode == O_PROB) { 1461 ipfw_insn_u32 *p = (ipfw_insn_u32 *)cmd; 1462 double d = 1.0 * p->d[0]; 1463 1464 d = (d / 0x7fffffff); 1465 bprintf(bp, "prob %f ", d); 1466 } 1467 } 1468 1469 /* 1470 * first print actions 1471 */ 1472 for (l = rule->cmd_len - rule->act_ofs, cmd = ACTION_PTR(rule); 1473 l > 0 ; l -= F_LEN(cmd), cmd += F_LEN(cmd)) { 1474 switch(cmd->opcode) { 1475 case O_CHECK_STATE: 1476 bprintf(bp, "check-state"); 1477 if (cmd->arg1 != 0) 1478 ename = object_search_ctlv(fo->tstate, 1479 cmd->arg1, IPFW_TLV_STATE_NAME); 1480 else 1481 ename = NULL; 1482 bprintf(bp, " %s", ename ? ename: "any"); 1483 /* avoid printing anything else */ 1484 flags = HAVE_PROTO | HAVE_SRCIP | 1485 HAVE_DSTIP | HAVE_IP; 1486 break; 1487 1488 case O_ACCEPT: 1489 bprintf(bp, "allow"); 1490 break; 1491 1492 case O_COUNT: 1493 bprintf(bp, "count"); 1494 break; 1495 1496 case O_DENY: 1497 bprintf(bp, "deny"); 1498 break; 1499 1500 case O_REJECT: 1501 if (cmd->arg1 == ICMP_REJECT_RST) 1502 bprintf(bp, "reset"); 1503 else if (cmd->arg1 == ICMP_UNREACH_HOST) 1504 bprintf(bp, "reject"); 1505 else 1506 print_reject_code(bp, cmd->arg1); 1507 break; 1508 1509 case O_UNREACH6: 1510 if (cmd->arg1 == ICMP6_UNREACH_RST) 1511 bprintf(bp, "reset6"); 1512 else 1513 print_unreach6_code(bp, cmd->arg1); 1514 break; 1515 1516 case O_SKIPTO: 1517 bprint_uint_arg(bp, "skipto ", cmd->arg1); 1518 break; 1519 1520 case O_PIPE: 1521 bprint_uint_arg(bp, "pipe ", cmd->arg1); 1522 break; 1523 1524 case O_QUEUE: 1525 bprint_uint_arg(bp, "queue ", cmd->arg1); 1526 break; 1527 1528 case O_DIVERT: 1529 bprint_uint_arg(bp, "divert ", cmd->arg1); 1530 break; 1531 1532 case O_TEE: 1533 bprint_uint_arg(bp, "tee ", cmd->arg1); 1534 break; 1535 1536 case O_NETGRAPH: 1537 bprint_uint_arg(bp, "netgraph ", cmd->arg1); 1538 break; 1539 1540 case O_NGTEE: 1541 bprint_uint_arg(bp, "ngtee ", cmd->arg1); 1542 break; 1543 1544 case O_FORWARD_IP: 1545 { 1546 ipfw_insn_sa *s = (ipfw_insn_sa *)cmd; 1547 1548 if (s->sa.sin_addr.s_addr == INADDR_ANY) { 1549 bprintf(bp, "fwd tablearg"); 1550 } else { 1551 bprintf(bp, "fwd %s",inet_ntoa(s->sa.sin_addr)); 1552 } 1553 if (s->sa.sin_port) 1554 bprintf(bp, ",%d", s->sa.sin_port); 1555 } 1556 break; 1557 1558 case O_FORWARD_IP6: 1559 { 1560 char buf[INET6_ADDRSTRLEN + IF_NAMESIZE + 2]; 1561 ipfw_insn_sa6 *s = (ipfw_insn_sa6 *)cmd; 1562 1563 bprintf(bp, "fwd "); 1564 if (getnameinfo((const struct sockaddr *)&s->sa, 1565 sizeof(struct sockaddr_in6), buf, sizeof(buf), 1566 NULL, 0, NI_NUMERICHOST) == 0) 1567 bprintf(bp, "%s", buf); 1568 if (s->sa.sin6_port) 1569 bprintf(bp, ",%d", s->sa.sin6_port); 1570 } 1571 break; 1572 1573 case O_LOG: /* O_LOG is printed last */ 1574 logptr = (ipfw_insn_log *)cmd; 1575 break; 1576 1577 case O_ALTQ: /* O_ALTQ is printed after O_LOG */ 1578 altqptr = (ipfw_insn_altq *)cmd; 1579 break; 1580 1581 case O_TAG: 1582 tagptr = cmd; 1583 break; 1584 1585 case O_NAT: 1586 if (cmd->arg1 != 0) 1587 bprint_uint_arg(bp, "nat ", cmd->arg1); 1588 else 1589 bprintf(bp, "nat global"); 1590 break; 1591 1592 case O_SETFIB: 1593 bprint_uint_arg(bp, "setfib ", cmd->arg1 & 0x7FFF); 1594 break; 1595 1596 case O_EXTERNAL_ACTION: { 1597 /* 1598 * The external action can consists of two following 1599 * each other opcodes - O_EXTERNAL_ACTION and 1600 * O_EXTERNAL_INSTANCE. The first contains the ID of 1601 * name of external action. The second contains the ID 1602 * of name of external action instance. 1603 * NOTE: in case when external action has no named 1604 * instances support, the second opcode isn't needed. 1605 */ 1606 has_eaction = cmd; 1607 ename = object_search_ctlv(fo->tstate, cmd->arg1, 1608 IPFW_TLV_EACTION); 1609 if (match_token(rule_eactions, ename) != -1) 1610 bprintf(bp, "%s", ename); 1611 else 1612 bprintf(bp, "eaction %s", ename); 1613 break; 1614 } 1615 1616 case O_EXTERNAL_INSTANCE: { 1617 if (has_eaction == NULL) 1618 break; 1619 /* 1620 * XXX: we need to teach ipfw(9) to rewrite opcodes 1621 * in the user buffer on rule addition. When we add 1622 * the rule, we specify zero TLV type for 1623 * O_EXTERNAL_INSTANCE object. To show correct 1624 * rule after `ipfw add` we need to search instance 1625 * name with zero type. But when we do `ipfw show` 1626 * we calculate TLV type using IPFW_TLV_EACTION_NAME() 1627 * macro. 1628 */ 1629 ename = object_search_ctlv(fo->tstate, cmd->arg1, 0); 1630 if (ename == NULL) 1631 ename = object_search_ctlv(fo->tstate, 1632 cmd->arg1, 1633 IPFW_TLV_EACTION_NAME(has_eaction->arg1)); 1634 bprintf(bp, " %s", ename); 1635 break; 1636 } 1637 1638 case O_SETDSCP: 1639 { 1640 const char *code; 1641 1642 if (cmd->arg1 == IP_FW_TARG) { 1643 bprint_uint_arg(bp, "setdscp ", cmd->arg1); 1644 break; 1645 } 1646 uval = cmd->arg1 & 0x3F; 1647 if ((code = match_value(f_ipdscp, uval)) != NULL) 1648 bprintf(bp, "setdscp %s", code); 1649 else 1650 bprint_uint_arg(bp, "setdscp ", uval); 1651 } 1652 break; 1653 1654 case O_REASS: 1655 bprintf(bp, "reass"); 1656 break; 1657 1658 case O_CALLRETURN: 1659 if (cmd->len & F_NOT) 1660 bprintf(bp, "return"); 1661 else 1662 bprint_uint_arg(bp, "call ", cmd->arg1); 1663 break; 1664 1665 default: 1666 bprintf(bp, "** unrecognized action %d len %d ", 1667 cmd->opcode, cmd->len); 1668 } 1669 } 1670 if (logptr) { 1671 if (logptr->max_log > 0) 1672 bprintf(bp, " log logamount %d", logptr->max_log); 1673 else 1674 bprintf(bp, " log"); 1675 } 1676 #ifndef NO_ALTQ 1677 if (altqptr) { 1678 print_altq_cmd(bp, altqptr); 1679 } 1680 #endif 1681 if (tagptr) { 1682 if (tagptr->len & F_NOT) 1683 bprint_uint_arg(bp, " untag ", tagptr->arg1); 1684 else 1685 bprint_uint_arg(bp, " tag ", tagptr->arg1); 1686 } 1687 1688 /* 1689 * then print the body. 1690 */ 1691 for (l = rule->act_ofs, cmd = rule->cmd; 1692 l > 0 ; l -= F_LEN(cmd) , cmd += F_LEN(cmd)) { 1693 if ((cmd->len & F_OR) || (cmd->len & F_NOT)) 1694 continue; 1695 if (cmd->opcode == O_IP4) { 1696 flags |= HAVE_PROTO4; 1697 break; 1698 } else if (cmd->opcode == O_IP6) { 1699 flags |= HAVE_PROTO6; 1700 break; 1701 } 1702 } 1703 if (rule->flags & IPFW_RULE_NOOPT) { /* empty rules before options */ 1704 if (!co->do_compact) { 1705 show_prerequisites(bp, &flags, HAVE_PROTO, 0); 1706 bprintf(bp, " from any to any"); 1707 } 1708 flags |= HAVE_IP | HAVE_OPTIONS | HAVE_PROTO | 1709 HAVE_SRCIP | HAVE_DSTIP; 1710 } 1711 1712 if (co->comment_only) 1713 comment = "..."; 1714 1715 for (l = rule->act_ofs, cmd = rule->cmd; 1716 l > 0 ; l -= F_LEN(cmd) , cmd += F_LEN(cmd)) { 1717 /* useful alias */ 1718 ipfw_insn_u32 *cmd32 = (ipfw_insn_u32 *)cmd; 1719 1720 if (co->comment_only) { 1721 if (cmd->opcode != O_NOP) 1722 continue; 1723 bprintf(bp, " // %s\n", (char *)(cmd + 1)); 1724 return; 1725 } 1726 1727 show_prerequisites(bp, &flags, 0, cmd->opcode); 1728 1729 switch(cmd->opcode) { 1730 case O_PROB: 1731 break; /* done already */ 1732 1733 case O_PROBE_STATE: 1734 break; /* no need to print anything here */ 1735 1736 case O_IP_SRC: 1737 case O_IP_SRC_LOOKUP: 1738 case O_IP_SRC_MASK: 1739 case O_IP_SRC_ME: 1740 case O_IP_SRC_SET: 1741 show_prerequisites(bp, &flags, HAVE_PROTO, 0); 1742 if (!(flags & HAVE_SRCIP)) 1743 bprintf(bp, " from"); 1744 if ((cmd->len & F_OR) && !or_block) 1745 bprintf(bp, " {"); 1746 print_ip(bp, fo, (ipfw_insn_ip *)cmd, 1747 (flags & HAVE_OPTIONS) ? " src-ip" : ""); 1748 flags |= HAVE_SRCIP; 1749 break; 1750 1751 case O_IP_DST: 1752 case O_IP_DST_LOOKUP: 1753 case O_IP_DST_MASK: 1754 case O_IP_DST_ME: 1755 case O_IP_DST_SET: 1756 show_prerequisites(bp, &flags, HAVE_PROTO|HAVE_SRCIP, 0); 1757 if (!(flags & HAVE_DSTIP)) 1758 bprintf(bp, " to"); 1759 if ((cmd->len & F_OR) && !or_block) 1760 bprintf(bp, " {"); 1761 print_ip(bp, fo, (ipfw_insn_ip *)cmd, 1762 (flags & HAVE_OPTIONS) ? " dst-ip" : ""); 1763 flags |= HAVE_DSTIP; 1764 break; 1765 1766 case O_IP6_SRC: 1767 case O_IP6_SRC_MASK: 1768 case O_IP6_SRC_ME: 1769 show_prerequisites(bp, &flags, HAVE_PROTO, 0); 1770 if (!(flags & HAVE_SRCIP)) 1771 bprintf(bp, " from"); 1772 if ((cmd->len & F_OR) && !or_block) 1773 bprintf(bp, " {"); 1774 print_ip6(bp, (ipfw_insn_ip6 *)cmd, 1775 (flags & HAVE_OPTIONS) ? " src-ip6" : ""); 1776 flags |= HAVE_SRCIP | HAVE_PROTO; 1777 break; 1778 1779 case O_IP6_DST: 1780 case O_IP6_DST_MASK: 1781 case O_IP6_DST_ME: 1782 show_prerequisites(bp, &flags, HAVE_PROTO|HAVE_SRCIP, 0); 1783 if (!(flags & HAVE_DSTIP)) 1784 bprintf(bp, " to"); 1785 if ((cmd->len & F_OR) && !or_block) 1786 bprintf(bp, " {"); 1787 print_ip6(bp, (ipfw_insn_ip6 *)cmd, 1788 (flags & HAVE_OPTIONS) ? " dst-ip6" : ""); 1789 flags |= HAVE_DSTIP; 1790 break; 1791 1792 case O_FLOW6ID: 1793 print_flow6id(bp, (ipfw_insn_u32 *) cmd ); 1794 flags |= HAVE_OPTIONS; 1795 break; 1796 1797 case O_IP_DSTPORT: 1798 show_prerequisites(bp, &flags, 1799 HAVE_PROTO | HAVE_SRCIP | 1800 HAVE_DSTIP | HAVE_IP, 0); 1801 case O_IP_SRCPORT: 1802 if (flags & HAVE_DSTIP) 1803 flags |= HAVE_IP; 1804 show_prerequisites(bp, &flags, 1805 HAVE_PROTO | HAVE_SRCIP, 0); 1806 if ((cmd->len & F_OR) && !or_block) 1807 bprintf(bp, " {"); 1808 if (cmd->len & F_NOT) 1809 bprintf(bp, " not"); 1810 print_newports(bp, (ipfw_insn_u16 *)cmd, proto, 1811 (flags & HAVE_OPTIONS) ? cmd->opcode : 0); 1812 break; 1813 1814 case O_PROTO: { 1815 struct protoent *pe = NULL; 1816 1817 if ((cmd->len & F_OR) && !or_block) 1818 bprintf(bp, " {"); 1819 if (cmd->len & F_NOT) 1820 bprintf(bp, " not"); 1821 proto = cmd->arg1; 1822 pe = getprotobynumber(cmd->arg1); 1823 if ((flags & (HAVE_PROTO4 | HAVE_PROTO6)) && 1824 !(flags & HAVE_PROTO)) 1825 show_prerequisites(bp, &flags, 1826 HAVE_PROTO | HAVE_IP | HAVE_SRCIP | 1827 HAVE_DSTIP | HAVE_OPTIONS, 0); 1828 if (flags & HAVE_OPTIONS) 1829 bprintf(bp, " proto"); 1830 if (pe) 1831 bprintf(bp, " %s", pe->p_name); 1832 else 1833 bprintf(bp, " %u", cmd->arg1); 1834 } 1835 flags |= HAVE_PROTO; 1836 break; 1837 1838 default: /*options ... */ 1839 if (!(cmd->len & (F_OR|F_NOT))) 1840 if (((cmd->opcode == O_IP6) && 1841 (flags & HAVE_PROTO6)) || 1842 ((cmd->opcode == O_IP4) && 1843 (flags & HAVE_PROTO4))) 1844 break; 1845 show_prerequisites(bp, &flags, HAVE_PROTO | HAVE_SRCIP | 1846 HAVE_DSTIP | HAVE_IP | HAVE_OPTIONS, 0); 1847 if ((cmd->len & F_OR) && !or_block) 1848 bprintf(bp, " {"); 1849 if (cmd->len & F_NOT && cmd->opcode != O_IN) 1850 bprintf(bp, " not"); 1851 switch(cmd->opcode) { 1852 case O_MACADDR2: { 1853 ipfw_insn_mac *m = (ipfw_insn_mac *)cmd; 1854 1855 bprintf(bp, " MAC"); 1856 print_mac(bp, m->addr, m->mask); 1857 print_mac(bp, m->addr + 6, m->mask + 6); 1858 } 1859 break; 1860 1861 case O_MAC_TYPE: 1862 print_newports(bp, (ipfw_insn_u16 *)cmd, 1863 IPPROTO_ETHERTYPE, cmd->opcode); 1864 break; 1865 1866 1867 case O_FRAG: 1868 bprintf(bp, " frag"); 1869 break; 1870 1871 case O_FIB: 1872 bprintf(bp, " fib %u", cmd->arg1 ); 1873 break; 1874 case O_SOCKARG: 1875 bprintf(bp, " sockarg"); 1876 break; 1877 1878 case O_IN: 1879 bprintf(bp, cmd->len & F_NOT ? " out" : " in"); 1880 break; 1881 1882 case O_DIVERTED: 1883 switch (cmd->arg1) { 1884 case 3: 1885 bprintf(bp, " diverted"); 1886 break; 1887 case 1: 1888 bprintf(bp, " diverted-loopback"); 1889 break; 1890 case 2: 1891 bprintf(bp, " diverted-output"); 1892 break; 1893 default: 1894 bprintf(bp, " diverted-?<%u>", cmd->arg1); 1895 break; 1896 } 1897 break; 1898 1899 case O_LAYER2: 1900 bprintf(bp, " layer2"); 1901 break; 1902 case O_XMIT: 1903 case O_RECV: 1904 case O_VIA: 1905 { 1906 char const *s, *t; 1907 ipfw_insn_if *cmdif = (ipfw_insn_if *)cmd; 1908 1909 if (cmd->opcode == O_XMIT) 1910 s = "xmit"; 1911 else if (cmd->opcode == O_RECV) 1912 s = "recv"; 1913 else /* if (cmd->opcode == O_VIA) */ 1914 s = "via"; 1915 if (cmdif->name[0] == '\0') 1916 bprintf(bp, " %s %s", s, 1917 inet_ntoa(cmdif->p.ip)); 1918 else if (cmdif->name[0] == '\1') { 1919 /* interface table */ 1920 t = table_search_ctlv(fo->tstate, 1921 cmdif->p.kidx); 1922 bprintf(bp, " %s table(%s)", s, t); 1923 } else 1924 bprintf(bp, " %s %s", s, cmdif->name); 1925 1926 break; 1927 } 1928 case O_IP_FLOW_LOOKUP: 1929 { 1930 char *t; 1931 1932 t = table_search_ctlv(fo->tstate, cmd->arg1); 1933 bprintf(bp, " flow table(%s", t); 1934 if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_u32)) 1935 bprintf(bp, ",%u", 1936 ((ipfw_insn_u32 *)cmd)->d[0]); 1937 bprintf(bp, ")"); 1938 break; 1939 } 1940 case O_IPID: 1941 if (F_LEN(cmd) == 1) 1942 bprintf(bp, " ipid %u", cmd->arg1 ); 1943 else 1944 print_newports(bp, (ipfw_insn_u16 *)cmd, 0, 1945 O_IPID); 1946 break; 1947 1948 case O_IPTTL: 1949 if (F_LEN(cmd) == 1) 1950 bprintf(bp, " ipttl %u", cmd->arg1 ); 1951 else 1952 print_newports(bp, (ipfw_insn_u16 *)cmd, 0, 1953 O_IPTTL); 1954 break; 1955 1956 case O_IPVER: 1957 bprintf(bp, " ipver %u", cmd->arg1 ); 1958 break; 1959 1960 case O_IPPRECEDENCE: 1961 bprintf(bp, " ipprecedence %u", cmd->arg1 >> 5); 1962 break; 1963 1964 case O_DSCP: 1965 print_dscp(bp, (ipfw_insn_u32 *)cmd); 1966 break; 1967 1968 case O_IPLEN: 1969 if (F_LEN(cmd) == 1) 1970 bprintf(bp, " iplen %u", cmd->arg1 ); 1971 else 1972 print_newports(bp, (ipfw_insn_u16 *)cmd, 0, 1973 O_IPLEN); 1974 break; 1975 1976 case O_IPOPT: 1977 print_flags(bp, "ipoptions", cmd, f_ipopts); 1978 break; 1979 1980 case O_IPTOS: 1981 print_flags(bp, "iptos", cmd, f_iptos); 1982 break; 1983 1984 case O_ICMPTYPE: 1985 print_icmptypes(bp, (ipfw_insn_u32 *)cmd); 1986 break; 1987 1988 case O_ESTAB: 1989 bprintf(bp, " established"); 1990 break; 1991 1992 case O_TCPDATALEN: 1993 if (F_LEN(cmd) == 1) 1994 bprintf(bp, " tcpdatalen %u", cmd->arg1 ); 1995 else 1996 print_newports(bp, (ipfw_insn_u16 *)cmd, 0, 1997 O_TCPDATALEN); 1998 break; 1999 2000 case O_TCPFLAGS: 2001 print_flags(bp, "tcpflags", cmd, f_tcpflags); 2002 break; 2003 2004 case O_TCPOPTS: 2005 print_flags(bp, "tcpoptions", cmd, f_tcpopts); 2006 break; 2007 2008 case O_TCPWIN: 2009 if (F_LEN(cmd) == 1) 2010 bprintf(bp, " tcpwin %u", cmd->arg1); 2011 else 2012 print_newports(bp, (ipfw_insn_u16 *)cmd, 0, 2013 O_TCPWIN); 2014 break; 2015 2016 case O_TCPACK: 2017 bprintf(bp, " tcpack %d", ntohl(cmd32->d[0])); 2018 break; 2019 2020 case O_TCPSEQ: 2021 bprintf(bp, " tcpseq %d", ntohl(cmd32->d[0])); 2022 break; 2023 2024 case O_UID: 2025 { 2026 struct passwd *pwd = getpwuid(cmd32->d[0]); 2027 2028 if (pwd) 2029 bprintf(bp, " uid %s", pwd->pw_name); 2030 else 2031 bprintf(bp, " uid %u", cmd32->d[0]); 2032 } 2033 break; 2034 2035 case O_GID: 2036 { 2037 struct group *grp = getgrgid(cmd32->d[0]); 2038 2039 if (grp) 2040 bprintf(bp, " gid %s", grp->gr_name); 2041 else 2042 bprintf(bp, " gid %u", cmd32->d[0]); 2043 } 2044 break; 2045 2046 case O_JAIL: 2047 bprintf(bp, " jail %d", cmd32->d[0]); 2048 break; 2049 2050 case O_VERREVPATH: 2051 bprintf(bp, " verrevpath"); 2052 break; 2053 2054 case O_VERSRCREACH: 2055 bprintf(bp, " versrcreach"); 2056 break; 2057 2058 case O_ANTISPOOF: 2059 bprintf(bp, " antispoof"); 2060 break; 2061 2062 case O_IPSEC: 2063 bprintf(bp, " ipsec"); 2064 break; 2065 2066 case O_NOP: 2067 comment = (char *)(cmd + 1); 2068 break; 2069 2070 case O_KEEP_STATE: 2071 bprintf(bp, " keep-state"); 2072 bprintf(bp, " %s", 2073 object_search_ctlv(fo->tstate, cmd->arg1, 2074 IPFW_TLV_STATE_NAME)); 2075 break; 2076 2077 case O_LIMIT: { 2078 struct _s_x *p = limit_masks; 2079 ipfw_insn_limit *c = (ipfw_insn_limit *)cmd; 2080 uint8_t x = c->limit_mask; 2081 char const *comma = " "; 2082 2083 bprintf(bp, " limit"); 2084 for (; p->x != 0 ; p++) 2085 if ((x & p->x) == p->x) { 2086 x &= ~p->x; 2087 bprintf(bp, "%s%s", comma,p->s); 2088 comma = ","; 2089 } 2090 bprint_uint_arg(bp, " ", c->conn_limit); 2091 bprintf(bp, " %s", 2092 object_search_ctlv(fo->tstate, cmd->arg1, 2093 IPFW_TLV_STATE_NAME)); 2094 break; 2095 } 2096 2097 case O_IP6: 2098 bprintf(bp, " ip6"); 2099 break; 2100 2101 case O_IP4: 2102 bprintf(bp, " ip4"); 2103 break; 2104 2105 case O_ICMP6TYPE: 2106 print_icmp6types(bp, (ipfw_insn_u32 *)cmd); 2107 break; 2108 2109 case O_EXT_HDR: 2110 print_ext6hdr(bp, (ipfw_insn *)cmd); 2111 break; 2112 2113 case O_TAGGED: 2114 if (F_LEN(cmd) == 1) 2115 bprint_uint_arg(bp, " tagged ", 2116 cmd->arg1); 2117 else 2118 print_newports(bp, (ipfw_insn_u16 *)cmd, 2119 0, O_TAGGED); 2120 break; 2121 2122 default: 2123 bprintf(bp, " [opcode %d len %d]", 2124 cmd->opcode, cmd->len); 2125 } 2126 } 2127 if (cmd->len & F_OR) { 2128 bprintf(bp, " or"); 2129 or_block = 1; 2130 } else if (or_block) { 2131 bprintf(bp, " }"); 2132 or_block = 0; 2133 } 2134 } 2135 show_prerequisites(bp, &flags, HAVE_PROTO | HAVE_SRCIP | HAVE_DSTIP 2136 | HAVE_IP, 0); 2137 if (comment) 2138 bprintf(bp, " // %s", comment); 2139 bprintf(bp, "\n"); 2140 } 2141 2142 static void 2143 show_dyn_state(struct cmdline_opts *co, struct format_opts *fo, 2144 struct buf_pr *bp, ipfw_dyn_rule *d) 2145 { 2146 struct protoent *pe; 2147 struct in_addr a; 2148 uint16_t rulenum; 2149 char buf[INET6_ADDRSTRLEN]; 2150 2151 if (!co->do_expired) { 2152 if (!d->expire && !(d->dyn_type == O_LIMIT_PARENT)) 2153 return; 2154 } 2155 bcopy(&d->rule, &rulenum, sizeof(rulenum)); 2156 bprintf(bp, "%05d", rulenum); 2157 if (fo->pcwidth > 0 || fo->bcwidth > 0) { 2158 bprintf(bp, " "); 2159 pr_u64(bp, &d->pcnt, fo->pcwidth); 2160 pr_u64(bp, &d->bcnt, fo->bcwidth); 2161 bprintf(bp, "(%ds)", d->expire); 2162 } 2163 switch (d->dyn_type) { 2164 case O_LIMIT_PARENT: 2165 bprintf(bp, " PARENT %d", d->count); 2166 break; 2167 case O_LIMIT: 2168 bprintf(bp, " LIMIT"); 2169 break; 2170 case O_KEEP_STATE: /* bidir, no mask */ 2171 bprintf(bp, " STATE"); 2172 break; 2173 } 2174 2175 if ((pe = getprotobynumber(d->id.proto)) != NULL) 2176 bprintf(bp, " %s", pe->p_name); 2177 else 2178 bprintf(bp, " proto %u", d->id.proto); 2179 2180 if (d->id.addr_type == 4) { 2181 a.s_addr = htonl(d->id.src_ip); 2182 bprintf(bp, " %s %d", inet_ntoa(a), d->id.src_port); 2183 2184 a.s_addr = htonl(d->id.dst_ip); 2185 bprintf(bp, " <-> %s %d", inet_ntoa(a), d->id.dst_port); 2186 } else if (d->id.addr_type == 6) { 2187 bprintf(bp, " %s %d", inet_ntop(AF_INET6, &d->id.src_ip6, buf, 2188 sizeof(buf)), d->id.src_port); 2189 bprintf(bp, " <-> %s %d", inet_ntop(AF_INET6, &d->id.dst_ip6, 2190 buf, sizeof(buf)), d->id.dst_port); 2191 } else 2192 bprintf(bp, " UNKNOWN <-> UNKNOWN"); 2193 if (d->kidx != 0) 2194 bprintf(bp, " %s", object_search_ctlv(fo->tstate, 2195 d->kidx, IPFW_TLV_STATE_NAME)); 2196 } 2197 2198 static int 2199 do_range_cmd(int cmd, ipfw_range_tlv *rt) 2200 { 2201 ipfw_range_header rh; 2202 size_t sz; 2203 2204 memset(&rh, 0, sizeof(rh)); 2205 memcpy(&rh.range, rt, sizeof(*rt)); 2206 rh.range.head.length = sizeof(*rt); 2207 rh.range.head.type = IPFW_TLV_RANGE; 2208 sz = sizeof(rh); 2209 2210 if (do_get3(cmd, &rh.opheader, &sz) != 0) 2211 return (-1); 2212 /* Save number of matched objects */ 2213 rt->new_set = rh.range.new_set; 2214 return (0); 2215 } 2216 2217 /* 2218 * This one handles all set-related commands 2219 * ipfw set { show | enable | disable } 2220 * ipfw set swap X Y 2221 * ipfw set move X to Y 2222 * ipfw set move rule X to Y 2223 */ 2224 void 2225 ipfw_sets_handler(char *av[]) 2226 { 2227 uint32_t masks[2]; 2228 int i; 2229 uint8_t cmd, rulenum; 2230 ipfw_range_tlv rt; 2231 char *msg; 2232 size_t size; 2233 2234 av++; 2235 memset(&rt, 0, sizeof(rt)); 2236 2237 if (av[0] == NULL) 2238 errx(EX_USAGE, "set needs command"); 2239 if (_substrcmp(*av, "show") == 0) { 2240 struct format_opts fo; 2241 ipfw_cfg_lheader *cfg; 2242 2243 memset(&fo, 0, sizeof(fo)); 2244 if (ipfw_get_config(&co, &fo, &cfg, &size) != 0) 2245 err(EX_OSERR, "requesting config failed"); 2246 2247 for (i = 0, msg = "disable"; i < RESVD_SET; i++) 2248 if ((cfg->set_mask & (1<<i)) == 0) { 2249 printf("%s %d", msg, i); 2250 msg = ""; 2251 } 2252 msg = (cfg->set_mask != (uint32_t)-1) ? " enable" : "enable"; 2253 for (i = 0; i < RESVD_SET; i++) 2254 if ((cfg->set_mask & (1<<i)) != 0) { 2255 printf("%s %d", msg, i); 2256 msg = ""; 2257 } 2258 printf("\n"); 2259 free(cfg); 2260 } else if (_substrcmp(*av, "swap") == 0) { 2261 av++; 2262 if ( av[0] == NULL || av[1] == NULL ) 2263 errx(EX_USAGE, "set swap needs 2 set numbers\n"); 2264 rt.set = atoi(av[0]); 2265 rt.new_set = atoi(av[1]); 2266 if (!isdigit(*(av[0])) || rt.set > RESVD_SET) 2267 errx(EX_DATAERR, "invalid set number %s\n", av[0]); 2268 if (!isdigit(*(av[1])) || rt.new_set > RESVD_SET) 2269 errx(EX_DATAERR, "invalid set number %s\n", av[1]); 2270 i = do_range_cmd(IP_FW_SET_SWAP, &rt); 2271 } else if (_substrcmp(*av, "move") == 0) { 2272 av++; 2273 if (av[0] && _substrcmp(*av, "rule") == 0) { 2274 rt.flags = IPFW_RCFLAG_RANGE; /* move rules to new set */ 2275 cmd = IP_FW_XMOVE; 2276 av++; 2277 } else 2278 cmd = IP_FW_SET_MOVE; /* Move set to new one */ 2279 if (av[0] == NULL || av[1] == NULL || av[2] == NULL || 2280 av[3] != NULL || _substrcmp(av[1], "to") != 0) 2281 errx(EX_USAGE, "syntax: set move [rule] X to Y\n"); 2282 rulenum = atoi(av[0]); 2283 rt.new_set = atoi(av[2]); 2284 if (cmd == IP_FW_XMOVE) { 2285 rt.start_rule = rulenum; 2286 rt.end_rule = rulenum; 2287 } else 2288 rt.set = rulenum; 2289 rt.new_set = atoi(av[2]); 2290 if (!isdigit(*(av[0])) || (cmd == 3 && rt.set > RESVD_SET) || 2291 (cmd == 2 && rt.start_rule == IPFW_DEFAULT_RULE) ) 2292 errx(EX_DATAERR, "invalid source number %s\n", av[0]); 2293 if (!isdigit(*(av[2])) || rt.new_set > RESVD_SET) 2294 errx(EX_DATAERR, "invalid dest. set %s\n", av[1]); 2295 i = do_range_cmd(cmd, &rt); 2296 if (i < 0) 2297 err(EX_OSERR, "failed to move %s", 2298 cmd == IP_FW_SET_MOVE ? "set": "rule"); 2299 } else if (_substrcmp(*av, "disable") == 0 || 2300 _substrcmp(*av, "enable") == 0 ) { 2301 int which = _substrcmp(*av, "enable") == 0 ? 1 : 0; 2302 2303 av++; 2304 masks[0] = masks[1] = 0; 2305 2306 while (av[0]) { 2307 if (isdigit(**av)) { 2308 i = atoi(*av); 2309 if (i < 0 || i > RESVD_SET) 2310 errx(EX_DATAERR, 2311 "invalid set number %d\n", i); 2312 masks[which] |= (1<<i); 2313 } else if (_substrcmp(*av, "disable") == 0) 2314 which = 0; 2315 else if (_substrcmp(*av, "enable") == 0) 2316 which = 1; 2317 else 2318 errx(EX_DATAERR, 2319 "invalid set command %s\n", *av); 2320 av++; 2321 } 2322 if ( (masks[0] & masks[1]) != 0 ) 2323 errx(EX_DATAERR, 2324 "cannot enable and disable the same set\n"); 2325 2326 rt.set = masks[0]; 2327 rt.new_set = masks[1]; 2328 i = do_range_cmd(IP_FW_SET_ENABLE, &rt); 2329 if (i) 2330 warn("set enable/disable: setsockopt(IP_FW_SET_ENABLE)"); 2331 } else 2332 errx(EX_USAGE, "invalid set command %s\n", *av); 2333 } 2334 2335 void 2336 ipfw_sysctl_handler(char *av[], int which) 2337 { 2338 av++; 2339 2340 if (av[0] == NULL) { 2341 warnx("missing keyword to enable/disable\n"); 2342 } else if (_substrcmp(*av, "firewall") == 0) { 2343 sysctlbyname("net.inet.ip.fw.enable", NULL, 0, 2344 &which, sizeof(which)); 2345 sysctlbyname("net.inet6.ip6.fw.enable", NULL, 0, 2346 &which, sizeof(which)); 2347 } else if (_substrcmp(*av, "one_pass") == 0) { 2348 sysctlbyname("net.inet.ip.fw.one_pass", NULL, 0, 2349 &which, sizeof(which)); 2350 } else if (_substrcmp(*av, "debug") == 0) { 2351 sysctlbyname("net.inet.ip.fw.debug", NULL, 0, 2352 &which, sizeof(which)); 2353 } else if (_substrcmp(*av, "verbose") == 0) { 2354 sysctlbyname("net.inet.ip.fw.verbose", NULL, 0, 2355 &which, sizeof(which)); 2356 } else if (_substrcmp(*av, "dyn_keepalive") == 0) { 2357 sysctlbyname("net.inet.ip.fw.dyn_keepalive", NULL, 0, 2358 &which, sizeof(which)); 2359 #ifndef NO_ALTQ 2360 } else if (_substrcmp(*av, "altq") == 0) { 2361 altq_set_enabled(which); 2362 #endif 2363 } else { 2364 warnx("unrecognize enable/disable keyword: %s\n", *av); 2365 } 2366 } 2367 2368 typedef void state_cb(struct cmdline_opts *co, struct format_opts *fo, 2369 void *arg, void *state); 2370 2371 static void 2372 prepare_format_dyn(struct cmdline_opts *co, struct format_opts *fo, 2373 void *arg, void *_state) 2374 { 2375 ipfw_dyn_rule *d; 2376 int width; 2377 uint8_t set; 2378 2379 d = (ipfw_dyn_rule *)_state; 2380 /* Count _ALL_ states */ 2381 fo->dcnt++; 2382 2383 if (fo->show_counters == 0) 2384 return; 2385 2386 if (co->use_set) { 2387 /* skip states from another set */ 2388 bcopy((char *)&d->rule + sizeof(uint16_t), &set, 2389 sizeof(uint8_t)); 2390 if (set != co->use_set - 1) 2391 return; 2392 } 2393 2394 width = pr_u64(NULL, &d->pcnt, 0); 2395 if (width > fo->pcwidth) 2396 fo->pcwidth = width; 2397 2398 width = pr_u64(NULL, &d->bcnt, 0); 2399 if (width > fo->bcwidth) 2400 fo->bcwidth = width; 2401 } 2402 2403 static int 2404 foreach_state(struct cmdline_opts *co, struct format_opts *fo, 2405 caddr_t base, size_t sz, state_cb dyn_bc, void *dyn_arg) 2406 { 2407 int ttype; 2408 state_cb *fptr; 2409 void *farg; 2410 ipfw_obj_tlv *tlv; 2411 ipfw_obj_ctlv *ctlv; 2412 2413 fptr = NULL; 2414 ttype = 0; 2415 2416 while (sz > 0) { 2417 ctlv = (ipfw_obj_ctlv *)base; 2418 switch (ctlv->head.type) { 2419 case IPFW_TLV_DYNSTATE_LIST: 2420 base += sizeof(*ctlv); 2421 sz -= sizeof(*ctlv); 2422 ttype = IPFW_TLV_DYN_ENT; 2423 fptr = dyn_bc; 2424 farg = dyn_arg; 2425 break; 2426 default: 2427 return (sz); 2428 } 2429 2430 while (sz > 0) { 2431 tlv = (ipfw_obj_tlv *)base; 2432 if (tlv->type != ttype) 2433 break; 2434 2435 fptr(co, fo, farg, tlv + 1); 2436 sz -= tlv->length; 2437 base += tlv->length; 2438 } 2439 } 2440 2441 return (sz); 2442 } 2443 2444 static void 2445 prepare_format_opts(struct cmdline_opts *co, struct format_opts *fo, 2446 ipfw_obj_tlv *rtlv, int rcnt, caddr_t dynbase, size_t dynsz) 2447 { 2448 int bcwidth, pcwidth, width; 2449 int n; 2450 struct ip_fw_bcounter *cntr; 2451 struct ip_fw_rule *r; 2452 2453 bcwidth = 0; 2454 pcwidth = 0; 2455 if (fo->show_counters != 0) { 2456 for (n = 0; n < rcnt; n++, 2457 rtlv = (ipfw_obj_tlv *)((caddr_t)rtlv + rtlv->length)) { 2458 cntr = (struct ip_fw_bcounter *)(rtlv + 1); 2459 r = (struct ip_fw_rule *)((caddr_t)cntr + cntr->size); 2460 /* skip rules from another set */ 2461 if (co->use_set && r->set != co->use_set - 1) 2462 continue; 2463 2464 /* packet counter */ 2465 width = pr_u64(NULL, &cntr->pcnt, 0); 2466 if (width > pcwidth) 2467 pcwidth = width; 2468 2469 /* byte counter */ 2470 width = pr_u64(NULL, &cntr->bcnt, 0); 2471 if (width > bcwidth) 2472 bcwidth = width; 2473 } 2474 } 2475 fo->bcwidth = bcwidth; 2476 fo->pcwidth = pcwidth; 2477 2478 fo->dcnt = 0; 2479 if (co->do_dynamic && dynsz > 0) 2480 foreach_state(co, fo, dynbase, dynsz, prepare_format_dyn, NULL); 2481 } 2482 2483 static int 2484 list_static_range(struct cmdline_opts *co, struct format_opts *fo, 2485 struct buf_pr *bp, ipfw_obj_tlv *rtlv, int rcnt) 2486 { 2487 int n, seen; 2488 struct ip_fw_rule *r; 2489 struct ip_fw_bcounter *cntr; 2490 int c = 0; 2491 2492 for (n = seen = 0; n < rcnt; n++, 2493 rtlv = (ipfw_obj_tlv *)((caddr_t)rtlv + rtlv->length)) { 2494 2495 if ((fo->show_counters | fo->show_time) != 0) { 2496 cntr = (struct ip_fw_bcounter *)(rtlv + 1); 2497 r = (struct ip_fw_rule *)((caddr_t)cntr + cntr->size); 2498 } else { 2499 cntr = NULL; 2500 r = (struct ip_fw_rule *)(rtlv + 1); 2501 } 2502 if (r->rulenum > fo->last) 2503 break; 2504 if (co->use_set && r->set != co->use_set - 1) 2505 continue; 2506 if (r->rulenum >= fo->first && r->rulenum <= fo->last) { 2507 show_static_rule(co, fo, bp, r, cntr); 2508 printf("%s", bp->buf); 2509 c += rtlv->length; 2510 bp_flush(bp); 2511 seen++; 2512 } 2513 } 2514 2515 return (seen); 2516 } 2517 2518 static void 2519 list_dyn_state(struct cmdline_opts *co, struct format_opts *fo, 2520 void *_arg, void *_state) 2521 { 2522 uint16_t rulenum; 2523 uint8_t set; 2524 ipfw_dyn_rule *d; 2525 struct buf_pr *bp; 2526 2527 d = (ipfw_dyn_rule *)_state; 2528 bp = (struct buf_pr *)_arg; 2529 2530 bcopy(&d->rule, &rulenum, sizeof(rulenum)); 2531 if (rulenum > fo->last) 2532 return; 2533 if (co->use_set) { 2534 bcopy((char *)&d->rule + sizeof(uint16_t), 2535 &set, sizeof(uint8_t)); 2536 if (set != co->use_set - 1) 2537 return; 2538 } 2539 if (rulenum >= fo->first) { 2540 show_dyn_state(co, fo, bp, d); 2541 printf("%s\n", bp->buf); 2542 bp_flush(bp); 2543 } 2544 } 2545 2546 static int 2547 list_dyn_range(struct cmdline_opts *co, struct format_opts *fo, 2548 struct buf_pr *bp, caddr_t base, size_t sz) 2549 { 2550 2551 sz = foreach_state(co, fo, base, sz, list_dyn_state, bp); 2552 return (sz); 2553 } 2554 2555 void 2556 ipfw_list(int ac, char *av[], int show_counters) 2557 { 2558 ipfw_cfg_lheader *cfg; 2559 struct format_opts sfo; 2560 size_t sz; 2561 int error; 2562 int lac; 2563 char **lav; 2564 uint32_t rnum; 2565 char *endptr; 2566 2567 if (co.test_only) { 2568 fprintf(stderr, "Testing only, list disabled\n"); 2569 return; 2570 } 2571 if (co.do_pipe) { 2572 dummynet_list(ac, av, show_counters); 2573 return; 2574 } 2575 2576 ac--; 2577 av++; 2578 memset(&sfo, 0, sizeof(sfo)); 2579 2580 /* Determine rule range to request */ 2581 if (ac > 0) { 2582 for (lac = ac, lav = av; lac != 0; lac--) { 2583 rnum = strtoul(*lav++, &endptr, 10); 2584 if (sfo.first == 0 || rnum < sfo.first) 2585 sfo.first = rnum; 2586 2587 if (*endptr == '-') 2588 rnum = strtoul(endptr + 1, &endptr, 10); 2589 if (sfo.last == 0 || rnum > sfo.last) 2590 sfo.last = rnum; 2591 } 2592 } 2593 2594 /* get configuraion from kernel */ 2595 cfg = NULL; 2596 sfo.show_counters = show_counters; 2597 sfo.show_time = co.do_time; 2598 sfo.flags = IPFW_CFG_GET_STATIC; 2599 if (co.do_dynamic != 0) 2600 sfo.flags |= IPFW_CFG_GET_STATES; 2601 if ((sfo.show_counters | sfo.show_time) != 0) 2602 sfo.flags |= IPFW_CFG_GET_COUNTERS; 2603 if (ipfw_get_config(&co, &sfo, &cfg, &sz) != 0) 2604 err(EX_OSERR, "retrieving config failed"); 2605 2606 error = ipfw_show_config(&co, &sfo, cfg, sz, ac, av); 2607 2608 free(cfg); 2609 2610 if (error != EX_OK) 2611 exit(error); 2612 } 2613 2614 static int 2615 ipfw_show_config(struct cmdline_opts *co, struct format_opts *fo, 2616 ipfw_cfg_lheader *cfg, size_t sz, int ac, char *av[]) 2617 { 2618 caddr_t dynbase; 2619 size_t dynsz; 2620 int rcnt; 2621 int exitval = EX_OK; 2622 int lac; 2623 char **lav; 2624 char *endptr; 2625 size_t readsz; 2626 struct buf_pr bp; 2627 ipfw_obj_ctlv *ctlv, *tstate; 2628 ipfw_obj_tlv *rbase; 2629 2630 /* 2631 * Handle tablenames TLV first, if any 2632 */ 2633 tstate = NULL; 2634 rbase = NULL; 2635 dynbase = NULL; 2636 dynsz = 0; 2637 readsz = sizeof(*cfg); 2638 rcnt = 0; 2639 2640 fo->set_mask = cfg->set_mask; 2641 2642 ctlv = (ipfw_obj_ctlv *)(cfg + 1); 2643 2644 if (cfg->flags & IPFW_CFG_GET_STATIC) { 2645 /* We've requested static rules */ 2646 if (ctlv->head.type == IPFW_TLV_TBLNAME_LIST) { 2647 object_sort_ctlv(ctlv); 2648 fo->tstate = ctlv; 2649 readsz += ctlv->head.length; 2650 ctlv = (ipfw_obj_ctlv *)((caddr_t)ctlv + 2651 ctlv->head.length); 2652 } 2653 2654 if (ctlv->head.type == IPFW_TLV_RULE_LIST) { 2655 rbase = (ipfw_obj_tlv *)(ctlv + 1); 2656 rcnt = ctlv->count; 2657 readsz += ctlv->head.length; 2658 ctlv = (ipfw_obj_ctlv *)((caddr_t)ctlv + 2659 ctlv->head.length); 2660 } 2661 } 2662 2663 if ((cfg->flags & IPFW_CFG_GET_STATES) && (readsz != sz)) { 2664 /* We may have some dynamic states */ 2665 dynsz = sz - readsz; 2666 /* Skip empty header */ 2667 if (dynsz != sizeof(ipfw_obj_ctlv)) 2668 dynbase = (caddr_t)ctlv; 2669 else 2670 dynsz = 0; 2671 } 2672 2673 prepare_format_opts(co, fo, rbase, rcnt, dynbase, dynsz); 2674 bp_alloc(&bp, 4096); 2675 2676 /* if no rule numbers were specified, list all rules */ 2677 if (ac == 0) { 2678 fo->first = 0; 2679 fo->last = IPFW_DEFAULT_RULE; 2680 list_static_range(co, fo, &bp, rbase, rcnt); 2681 2682 if (co->do_dynamic && dynsz > 0) { 2683 printf("## Dynamic rules (%d %zu):\n", fo->dcnt, dynsz); 2684 list_dyn_range(co, fo, &bp, dynbase, dynsz); 2685 } 2686 2687 bp_free(&bp); 2688 return (EX_OK); 2689 } 2690 2691 /* display specific rules requested on command line */ 2692 for (lac = ac, lav = av; lac != 0; lac--) { 2693 /* convert command line rule # */ 2694 fo->last = fo->first = strtoul(*lav++, &endptr, 10); 2695 if (*endptr == '-') 2696 fo->last = strtoul(endptr + 1, &endptr, 10); 2697 if (*endptr) { 2698 exitval = EX_USAGE; 2699 warnx("invalid rule number: %s", *(lav - 1)); 2700 continue; 2701 } 2702 2703 if (list_static_range(co, fo, &bp, rbase, rcnt) == 0) { 2704 /* give precedence to other error(s) */ 2705 if (exitval == EX_OK) 2706 exitval = EX_UNAVAILABLE; 2707 if (fo->first == fo->last) 2708 warnx("rule %u does not exist", fo->first); 2709 else 2710 warnx("no rules in range %u-%u", 2711 fo->first, fo->last); 2712 } 2713 } 2714 2715 if (co->do_dynamic && dynsz > 0) { 2716 printf("## Dynamic rules:\n"); 2717 for (lac = ac, lav = av; lac != 0; lac--) { 2718 fo->last = fo->first = strtoul(*lav++, &endptr, 10); 2719 if (*endptr == '-') 2720 fo->last = strtoul(endptr+1, &endptr, 10); 2721 if (*endptr) 2722 /* already warned */ 2723 continue; 2724 list_dyn_range(co, fo, &bp, dynbase, dynsz); 2725 } 2726 } 2727 2728 bp_free(&bp); 2729 return (exitval); 2730 } 2731 2732 2733 /* 2734 * Retrieves current ipfw configuration of given type 2735 * and stores its pointer to @pcfg. 2736 * 2737 * Caller is responsible for freeing @pcfg. 2738 * 2739 * Returns 0 on success. 2740 */ 2741 2742 static int 2743 ipfw_get_config(struct cmdline_opts *co, struct format_opts *fo, 2744 ipfw_cfg_lheader **pcfg, size_t *psize) 2745 { 2746 ipfw_cfg_lheader *cfg; 2747 size_t sz; 2748 int i; 2749 2750 2751 if (co->test_only != 0) { 2752 fprintf(stderr, "Testing only, list disabled\n"); 2753 return (0); 2754 } 2755 2756 /* Start with some data size */ 2757 sz = 4096; 2758 cfg = NULL; 2759 2760 for (i = 0; i < 16; i++) { 2761 if (cfg != NULL) 2762 free(cfg); 2763 if ((cfg = calloc(1, sz)) == NULL) 2764 return (ENOMEM); 2765 2766 cfg->flags = fo->flags; 2767 cfg->start_rule = fo->first; 2768 cfg->end_rule = fo->last; 2769 2770 if (do_get3(IP_FW_XGET, &cfg->opheader, &sz) != 0) { 2771 if (errno != ENOMEM) { 2772 free(cfg); 2773 return (errno); 2774 } 2775 2776 /* Buffer size is not enough. Try to increase */ 2777 sz = sz * 2; 2778 if (sz < cfg->size) 2779 sz = cfg->size; 2780 continue; 2781 } 2782 2783 *pcfg = cfg; 2784 *psize = sz; 2785 return (0); 2786 } 2787 2788 free(cfg); 2789 return (ENOMEM); 2790 } 2791 2792 static int 2793 lookup_host (char *host, struct in_addr *ipaddr) 2794 { 2795 struct hostent *he; 2796 2797 if (!inet_aton(host, ipaddr)) { 2798 if ((he = gethostbyname(host)) == NULL) 2799 return(-1); 2800 *ipaddr = *(struct in_addr *)he->h_addr_list[0]; 2801 } 2802 return(0); 2803 } 2804 2805 struct tidx { 2806 ipfw_obj_ntlv *idx; 2807 uint32_t count; 2808 uint32_t size; 2809 uint16_t counter; 2810 uint8_t set; 2811 }; 2812 2813 int 2814 ipfw_check_object_name(const char *name) 2815 { 2816 int c, i, l; 2817 2818 /* 2819 * Check that name is null-terminated and contains 2820 * valid symbols only. Valid mask is: 2821 * [a-zA-Z0-9\-_\.]{1,63} 2822 */ 2823 l = strlen(name); 2824 if (l == 0 || l >= 64) 2825 return (EINVAL); 2826 for (i = 0; i < l; i++) { 2827 c = name[i]; 2828 if (isalpha(c) || isdigit(c) || c == '_' || 2829 c == '-' || c == '.') 2830 continue; 2831 return (EINVAL); 2832 } 2833 return (0); 2834 } 2835 2836 static char *default_state_name = "default"; 2837 static int 2838 state_check_name(const char *name) 2839 { 2840 2841 if (ipfw_check_object_name(name) != 0) 2842 return (EINVAL); 2843 if (strcmp(name, "any") == 0) 2844 return (EINVAL); 2845 return (0); 2846 } 2847 2848 static int 2849 eaction_check_name(const char *name) 2850 { 2851 2852 if (ipfw_check_object_name(name) != 0) 2853 return (EINVAL); 2854 /* Restrict some 'special' names */ 2855 if (match_token(rule_actions, name) != -1 && 2856 match_token(rule_action_params, name) != -1) 2857 return (EINVAL); 2858 return (0); 2859 } 2860 2861 static uint16_t 2862 pack_object(struct tidx *tstate, char *name, int otype) 2863 { 2864 int i; 2865 ipfw_obj_ntlv *ntlv; 2866 2867 for (i = 0; i < tstate->count; i++) { 2868 if (strcmp(tstate->idx[i].name, name) != 0) 2869 continue; 2870 if (tstate->idx[i].set != tstate->set) 2871 continue; 2872 if (tstate->idx[i].head.type != otype) 2873 continue; 2874 2875 return (tstate->idx[i].idx); 2876 } 2877 2878 if (tstate->count + 1 > tstate->size) { 2879 tstate->size += 4; 2880 tstate->idx = realloc(tstate->idx, tstate->size * 2881 sizeof(ipfw_obj_ntlv)); 2882 if (tstate->idx == NULL) 2883 return (0); 2884 } 2885 2886 ntlv = &tstate->idx[i]; 2887 memset(ntlv, 0, sizeof(ipfw_obj_ntlv)); 2888 strlcpy(ntlv->name, name, sizeof(ntlv->name)); 2889 ntlv->head.type = otype; 2890 ntlv->head.length = sizeof(ipfw_obj_ntlv); 2891 ntlv->set = tstate->set; 2892 ntlv->idx = ++tstate->counter; 2893 tstate->count++; 2894 2895 return (ntlv->idx); 2896 } 2897 2898 static uint16_t 2899 pack_table(struct tidx *tstate, char *name) 2900 { 2901 2902 if (table_check_name(name) != 0) 2903 return (0); 2904 2905 return (pack_object(tstate, name, IPFW_TLV_TBL_NAME)); 2906 } 2907 2908 static void 2909 fill_table(ipfw_insn *cmd, char *av, uint8_t opcode, struct tidx *tstate) 2910 { 2911 uint32_t *d = ((ipfw_insn_u32 *)cmd)->d; 2912 uint16_t uidx; 2913 char *p; 2914 2915 if ((p = strchr(av + 6, ')')) == NULL) 2916 errx(EX_DATAERR, "forgotten parenthesis: '%s'", av); 2917 *p = '\0'; 2918 p = strchr(av + 6, ','); 2919 if (p) 2920 *p++ = '\0'; 2921 2922 if ((uidx = pack_table(tstate, av + 6)) == 0) 2923 errx(EX_DATAERR, "Invalid table name: %s", av + 6); 2924 2925 cmd->opcode = opcode; 2926 cmd->arg1 = uidx; 2927 if (p) { 2928 cmd->len |= F_INSN_SIZE(ipfw_insn_u32); 2929 d[0] = strtoul(p, NULL, 0); 2930 } else 2931 cmd->len |= F_INSN_SIZE(ipfw_insn); 2932 } 2933 2934 2935 /* 2936 * fills the addr and mask fields in the instruction as appropriate from av. 2937 * Update length as appropriate. 2938 * The following formats are allowed: 2939 * me returns O_IP_*_ME 2940 * 1.2.3.4 single IP address 2941 * 1.2.3.4:5.6.7.8 address:mask 2942 * 1.2.3.4/24 address/mask 2943 * 1.2.3.4/26{1,6,5,4,23} set of addresses in a subnet 2944 * We can have multiple comma-separated address/mask entries. 2945 */ 2946 static void 2947 fill_ip(ipfw_insn_ip *cmd, char *av, int cblen, struct tidx *tstate) 2948 { 2949 int len = 0; 2950 uint32_t *d = ((ipfw_insn_u32 *)cmd)->d; 2951 2952 cmd->o.len &= ~F_LEN_MASK; /* zero len */ 2953 2954 if (_substrcmp(av, "any") == 0) 2955 return; 2956 2957 if (_substrcmp(av, "me") == 0) { 2958 cmd->o.len |= F_INSN_SIZE(ipfw_insn); 2959 return; 2960 } 2961 2962 if (strncmp(av, "table(", 6) == 0) { 2963 fill_table(&cmd->o, av, O_IP_DST_LOOKUP, tstate); 2964 return; 2965 } 2966 2967 while (av) { 2968 /* 2969 * After the address we can have '/' or ':' indicating a mask, 2970 * ',' indicating another address follows, '{' indicating a 2971 * set of addresses of unspecified size. 2972 */ 2973 char *t = NULL, *p = strpbrk(av, "/:,{"); 2974 int masklen; 2975 char md, nd = '\0'; 2976 2977 CHECK_LENGTH(cblen, F_INSN_SIZE(ipfw_insn) + 2 + len); 2978 2979 if (p) { 2980 md = *p; 2981 *p++ = '\0'; 2982 if ((t = strpbrk(p, ",{")) != NULL) { 2983 nd = *t; 2984 *t = '\0'; 2985 } 2986 } else 2987 md = '\0'; 2988 2989 if (lookup_host(av, (struct in_addr *)&d[0]) != 0) 2990 errx(EX_NOHOST, "hostname ``%s'' unknown", av); 2991 switch (md) { 2992 case ':': 2993 if (!inet_aton(p, (struct in_addr *)&d[1])) 2994 errx(EX_DATAERR, "bad netmask ``%s''", p); 2995 break; 2996 case '/': 2997 masklen = atoi(p); 2998 if (masklen == 0) 2999 d[1] = htonl(0U); /* mask */ 3000 else if (masklen > 32) 3001 errx(EX_DATAERR, "bad width ``%s''", p); 3002 else 3003 d[1] = htonl(~0U << (32 - masklen)); 3004 break; 3005 case '{': /* no mask, assume /24 and put back the '{' */ 3006 d[1] = htonl(~0U << (32 - 24)); 3007 *(--p) = md; 3008 break; 3009 3010 case ',': /* single address plus continuation */ 3011 *(--p) = md; 3012 /* FALLTHROUGH */ 3013 case 0: /* initialization value */ 3014 default: 3015 d[1] = htonl(~0U); /* force /32 */ 3016 break; 3017 } 3018 d[0] &= d[1]; /* mask base address with mask */ 3019 if (t) 3020 *t = nd; 3021 /* find next separator */ 3022 if (p) 3023 p = strpbrk(p, ",{"); 3024 if (p && *p == '{') { 3025 /* 3026 * We have a set of addresses. They are stored as follows: 3027 * arg1 is the set size (powers of 2, 2..256) 3028 * addr is the base address IN HOST FORMAT 3029 * mask.. is an array of arg1 bits (rounded up to 3030 * the next multiple of 32) with bits set 3031 * for each host in the map. 3032 */ 3033 uint32_t *map = (uint32_t *)&cmd->mask; 3034 int low, high; 3035 int i = contigmask((uint8_t *)&(d[1]), 32); 3036 3037 if (len > 0) 3038 errx(EX_DATAERR, "address set cannot be in a list"); 3039 if (i < 24 || i > 31) 3040 errx(EX_DATAERR, "invalid set with mask %d\n", i); 3041 cmd->o.arg1 = 1<<(32-i); /* map length */ 3042 d[0] = ntohl(d[0]); /* base addr in host format */ 3043 cmd->o.opcode = O_IP_DST_SET; /* default */ 3044 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32) + (cmd->o.arg1+31)/32; 3045 for (i = 0; i < (cmd->o.arg1+31)/32 ; i++) 3046 map[i] = 0; /* clear map */ 3047 3048 av = p + 1; 3049 low = d[0] & 0xff; 3050 high = low + cmd->o.arg1 - 1; 3051 /* 3052 * Here, i stores the previous value when we specify a range 3053 * of addresses within a mask, e.g. 45-63. i = -1 means we 3054 * have no previous value. 3055 */ 3056 i = -1; /* previous value in a range */ 3057 while (isdigit(*av)) { 3058 char *s; 3059 int a = strtol(av, &s, 0); 3060 3061 if (s == av) { /* no parameter */ 3062 if (*av != '}') 3063 errx(EX_DATAERR, "set not closed\n"); 3064 if (i != -1) 3065 errx(EX_DATAERR, "incomplete range %d-", i); 3066 break; 3067 } 3068 if (a < low || a > high) 3069 errx(EX_DATAERR, "addr %d out of range [%d-%d]\n", 3070 a, low, high); 3071 a -= low; 3072 if (i == -1) /* no previous in range */ 3073 i = a; 3074 else { /* check that range is valid */ 3075 if (i > a) 3076 errx(EX_DATAERR, "invalid range %d-%d", 3077 i+low, a+low); 3078 if (*s == '-') 3079 errx(EX_DATAERR, "double '-' in range"); 3080 } 3081 for (; i <= a; i++) 3082 map[i/32] |= 1<<(i & 31); 3083 i = -1; 3084 if (*s == '-') 3085 i = a; 3086 else if (*s == '}') 3087 break; 3088 av = s+1; 3089 } 3090 return; 3091 } 3092 av = p; 3093 if (av) /* then *av must be a ',' */ 3094 av++; 3095 3096 /* Check this entry */ 3097 if (d[1] == 0) { /* "any", specified as x.x.x.x/0 */ 3098 /* 3099 * 'any' turns the entire list into a NOP. 3100 * 'not any' never matches, so it is removed from the 3101 * list unless it is the only item, in which case we 3102 * report an error. 3103 */ 3104 if (cmd->o.len & F_NOT) { /* "not any" never matches */ 3105 if (av == NULL && len == 0) /* only this entry */ 3106 errx(EX_DATAERR, "not any never matches"); 3107 } 3108 /* else do nothing and skip this entry */ 3109 return; 3110 } 3111 /* A single IP can be stored in an optimized format */ 3112 if (d[1] == (uint32_t)~0 && av == NULL && len == 0) { 3113 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32); 3114 return; 3115 } 3116 len += 2; /* two words... */ 3117 d += 2; 3118 } /* end while */ 3119 if (len + 1 > F_LEN_MASK) 3120 errx(EX_DATAERR, "address list too long"); 3121 cmd->o.len |= len+1; 3122 } 3123 3124 3125 /* n2mask sets n bits of the mask */ 3126 void 3127 n2mask(struct in6_addr *mask, int n) 3128 { 3129 static int minimask[9] = 3130 { 0x00, 0x80, 0xc0, 0xe0, 0xf0, 0xf8, 0xfc, 0xfe, 0xff }; 3131 u_char *p; 3132 3133 memset(mask, 0, sizeof(struct in6_addr)); 3134 p = (u_char *) mask; 3135 for (; n > 0; p++, n -= 8) { 3136 if (n >= 8) 3137 *p = 0xff; 3138 else 3139 *p = minimask[n]; 3140 } 3141 return; 3142 } 3143 3144 static void 3145 fill_flags_cmd(ipfw_insn *cmd, enum ipfw_opcodes opcode, 3146 struct _s_x *flags, char *p) 3147 { 3148 char *e; 3149 uint32_t set = 0, clear = 0; 3150 3151 if (fill_flags(flags, p, &e, &set, &clear) != 0) 3152 errx(EX_DATAERR, "invalid flag %s", e); 3153 3154 cmd->opcode = opcode; 3155 cmd->len = (cmd->len & (F_NOT | F_OR)) | 1; 3156 cmd->arg1 = (set & 0xff) | ( (clear & 0xff) << 8); 3157 } 3158 3159 3160 void 3161 ipfw_delete(char *av[]) 3162 { 3163 int i, j; 3164 int exitval = EX_OK; 3165 int do_set = 0; 3166 char *sep; 3167 ipfw_range_tlv rt; 3168 3169 av++; 3170 NEED1("missing rule specification"); 3171 memset(&rt, 0, sizeof(rt)); 3172 if ( *av && _substrcmp(*av, "set") == 0) { 3173 /* Do not allow using the following syntax: 3174 * ipfw set N delete set M 3175 */ 3176 if (co.use_set) 3177 errx(EX_DATAERR, "invalid syntax"); 3178 do_set = 1; /* delete set */ 3179 av++; 3180 } 3181 3182 /* Rule number */ 3183 while (*av && isdigit(**av)) { 3184 i = strtol(*av, &sep, 10); 3185 j = i; 3186 if (*sep== '-') 3187 j = strtol(sep + 1, NULL, 10); 3188 av++; 3189 if (co.do_nat) { 3190 exitval = do_cmd(IP_FW_NAT_DEL, &i, sizeof i); 3191 if (exitval) { 3192 exitval = EX_UNAVAILABLE; 3193 warn("rule %u not available", i); 3194 } 3195 } else if (co.do_pipe) { 3196 exitval = ipfw_delete_pipe(co.do_pipe, i); 3197 } else { 3198 if (do_set != 0) { 3199 rt.set = i & 31; 3200 rt.flags = IPFW_RCFLAG_SET; 3201 } else { 3202 rt.start_rule = i & 0xffff; 3203 rt.end_rule = j & 0xffff; 3204 if (rt.start_rule == 0 && rt.end_rule == 0) 3205 rt.flags |= IPFW_RCFLAG_ALL; 3206 else 3207 rt.flags |= IPFW_RCFLAG_RANGE; 3208 if (co.use_set != 0) { 3209 rt.set = co.use_set - 1; 3210 rt.flags |= IPFW_RCFLAG_SET; 3211 } 3212 } 3213 i = do_range_cmd(IP_FW_XDEL, &rt); 3214 if (i != 0) { 3215 exitval = EX_UNAVAILABLE; 3216 warn("rule %u: setsockopt(IP_FW_XDEL)", 3217 rt.start_rule); 3218 } else if (rt.new_set == 0) { 3219 exitval = EX_UNAVAILABLE; 3220 if (rt.start_rule != rt.end_rule) 3221 warnx("no rules rules in %u-%u range", 3222 rt.start_rule, rt.end_rule); 3223 else 3224 warnx("rule %u not found", 3225 rt.start_rule); 3226 } 3227 } 3228 } 3229 if (exitval != EX_OK) 3230 exit(exitval); 3231 } 3232 3233 3234 /* 3235 * fill the interface structure. We do not check the name as we can 3236 * create interfaces dynamically, so checking them at insert time 3237 * makes relatively little sense. 3238 * Interface names containing '*', '?', or '[' are assumed to be shell 3239 * patterns which match interfaces. 3240 */ 3241 static void 3242 fill_iface(ipfw_insn_if *cmd, char *arg, int cblen, struct tidx *tstate) 3243 { 3244 char *p; 3245 uint16_t uidx; 3246 3247 cmd->name[0] = '\0'; 3248 cmd->o.len |= F_INSN_SIZE(ipfw_insn_if); 3249 3250 CHECK_CMDLEN; 3251 3252 /* Parse the interface or address */ 3253 if (strcmp(arg, "any") == 0) 3254 cmd->o.len = 0; /* effectively ignore this command */ 3255 else if (strncmp(arg, "table(", 6) == 0) { 3256 if ((p = strchr(arg + 6, ')')) == NULL) 3257 errx(EX_DATAERR, "forgotten parenthesis: '%s'", arg); 3258 *p = '\0'; 3259 p = strchr(arg + 6, ','); 3260 if (p) 3261 *p++ = '\0'; 3262 if ((uidx = pack_table(tstate, arg + 6)) == 0) 3263 errx(EX_DATAERR, "Invalid table name: %s", arg + 6); 3264 3265 cmd->name[0] = '\1'; /* Special value indicating table */ 3266 cmd->p.kidx = uidx; 3267 } else if (!isdigit(*arg)) { 3268 strlcpy(cmd->name, arg, sizeof(cmd->name)); 3269 cmd->p.glob = strpbrk(arg, "*?[") != NULL ? 1 : 0; 3270 } else if (!inet_aton(arg, &cmd->p.ip)) 3271 errx(EX_DATAERR, "bad ip address ``%s''", arg); 3272 } 3273 3274 static void 3275 get_mac_addr_mask(const char *p, uint8_t *addr, uint8_t *mask) 3276 { 3277 int i; 3278 size_t l; 3279 char *ap, *ptr, *optr; 3280 struct ether_addr *mac; 3281 const char *macset = "0123456789abcdefABCDEF:"; 3282 3283 if (strcmp(p, "any") == 0) { 3284 for (i = 0; i < ETHER_ADDR_LEN; i++) 3285 addr[i] = mask[i] = 0; 3286 return; 3287 } 3288 3289 optr = ptr = strdup(p); 3290 if ((ap = strsep(&ptr, "&/")) != NULL && *ap != 0) { 3291 l = strlen(ap); 3292 if (strspn(ap, macset) != l || (mac = ether_aton(ap)) == NULL) 3293 errx(EX_DATAERR, "Incorrect MAC address"); 3294 bcopy(mac, addr, ETHER_ADDR_LEN); 3295 } else 3296 errx(EX_DATAERR, "Incorrect MAC address"); 3297 3298 if (ptr != NULL) { /* we have mask? */ 3299 if (p[ptr - optr - 1] == '/') { /* mask len */ 3300 long ml = strtol(ptr, &ap, 10); 3301 if (*ap != 0 || ml > ETHER_ADDR_LEN * 8 || ml < 0) 3302 errx(EX_DATAERR, "Incorrect mask length"); 3303 for (i = 0; ml > 0 && i < ETHER_ADDR_LEN; ml -= 8, i++) 3304 mask[i] = (ml >= 8) ? 0xff: (~0) << (8 - ml); 3305 } else { /* mask */ 3306 l = strlen(ptr); 3307 if (strspn(ptr, macset) != l || 3308 (mac = ether_aton(ptr)) == NULL) 3309 errx(EX_DATAERR, "Incorrect mask"); 3310 bcopy(mac, mask, ETHER_ADDR_LEN); 3311 } 3312 } else { /* default mask: ff:ff:ff:ff:ff:ff */ 3313 for (i = 0; i < ETHER_ADDR_LEN; i++) 3314 mask[i] = 0xff; 3315 } 3316 for (i = 0; i < ETHER_ADDR_LEN; i++) 3317 addr[i] &= mask[i]; 3318 3319 free(optr); 3320 } 3321 3322 /* 3323 * helper function, updates the pointer to cmd with the length 3324 * of the current command, and also cleans up the first word of 3325 * the new command in case it has been clobbered before. 3326 */ 3327 static ipfw_insn * 3328 next_cmd(ipfw_insn *cmd, int *len) 3329 { 3330 *len -= F_LEN(cmd); 3331 CHECK_LENGTH(*len, 0); 3332 cmd += F_LEN(cmd); 3333 bzero(cmd, sizeof(*cmd)); 3334 return cmd; 3335 } 3336 3337 /* 3338 * Takes arguments and copies them into a comment 3339 */ 3340 static void 3341 fill_comment(ipfw_insn *cmd, char **av, int cblen) 3342 { 3343 int i, l; 3344 char *p = (char *)(cmd + 1); 3345 3346 cmd->opcode = O_NOP; 3347 cmd->len = (cmd->len & (F_NOT | F_OR)); 3348 3349 /* Compute length of comment string. */ 3350 for (i = 0, l = 0; av[i] != NULL; i++) 3351 l += strlen(av[i]) + 1; 3352 if (l == 0) 3353 return; 3354 if (l > 84) 3355 errx(EX_DATAERR, 3356 "comment too long (max 80 chars)"); 3357 l = 1 + (l+3)/4; 3358 cmd->len = (cmd->len & (F_NOT | F_OR)) | l; 3359 CHECK_CMDLEN; 3360 3361 for (i = 0; av[i] != NULL; i++) { 3362 strcpy(p, av[i]); 3363 p += strlen(av[i]); 3364 *p++ = ' '; 3365 } 3366 *(--p) = '\0'; 3367 } 3368 3369 /* 3370 * A function to fill simple commands of size 1. 3371 * Existing flags are preserved. 3372 */ 3373 static void 3374 fill_cmd(ipfw_insn *cmd, enum ipfw_opcodes opcode, int flags, uint16_t arg) 3375 { 3376 cmd->opcode = opcode; 3377 cmd->len = ((cmd->len | flags) & (F_NOT | F_OR)) | 1; 3378 cmd->arg1 = arg; 3379 } 3380 3381 /* 3382 * Fetch and add the MAC address and type, with masks. This generates one or 3383 * two microinstructions, and returns the pointer to the last one. 3384 */ 3385 static ipfw_insn * 3386 add_mac(ipfw_insn *cmd, char *av[], int cblen) 3387 { 3388 ipfw_insn_mac *mac; 3389 3390 if ( ( av[0] == NULL ) || ( av[1] == NULL ) ) 3391 errx(EX_DATAERR, "MAC dst src"); 3392 3393 cmd->opcode = O_MACADDR2; 3394 cmd->len = (cmd->len & (F_NOT | F_OR)) | F_INSN_SIZE(ipfw_insn_mac); 3395 CHECK_CMDLEN; 3396 3397 mac = (ipfw_insn_mac *)cmd; 3398 get_mac_addr_mask(av[0], mac->addr, mac->mask); /* dst */ 3399 get_mac_addr_mask(av[1], &(mac->addr[ETHER_ADDR_LEN]), 3400 &(mac->mask[ETHER_ADDR_LEN])); /* src */ 3401 return cmd; 3402 } 3403 3404 static ipfw_insn * 3405 add_mactype(ipfw_insn *cmd, char *av, int cblen) 3406 { 3407 if (!av) 3408 errx(EX_DATAERR, "missing MAC type"); 3409 if (strcmp(av, "any") != 0) { /* we have a non-null type */ 3410 fill_newports((ipfw_insn_u16 *)cmd, av, IPPROTO_ETHERTYPE, 3411 cblen); 3412 cmd->opcode = O_MAC_TYPE; 3413 return cmd; 3414 } else 3415 return NULL; 3416 } 3417 3418 static ipfw_insn * 3419 add_proto0(ipfw_insn *cmd, char *av, u_char *protop) 3420 { 3421 struct protoent *pe; 3422 char *ep; 3423 int proto; 3424 3425 proto = strtol(av, &ep, 10); 3426 if (*ep != '\0' || proto <= 0) { 3427 if ((pe = getprotobyname(av)) == NULL) 3428 return NULL; 3429 proto = pe->p_proto; 3430 } 3431 3432 fill_cmd(cmd, O_PROTO, 0, proto); 3433 *protop = proto; 3434 return cmd; 3435 } 3436 3437 static ipfw_insn * 3438 add_proto(ipfw_insn *cmd, char *av, u_char *protop) 3439 { 3440 u_char proto = IPPROTO_IP; 3441 3442 if (_substrcmp(av, "all") == 0 || strcmp(av, "ip") == 0) 3443 ; /* do not set O_IP4 nor O_IP6 */ 3444 else if (strcmp(av, "ip4") == 0) 3445 /* explicit "just IPv4" rule */ 3446 fill_cmd(cmd, O_IP4, 0, 0); 3447 else if (strcmp(av, "ip6") == 0) { 3448 /* explicit "just IPv6" rule */ 3449 proto = IPPROTO_IPV6; 3450 fill_cmd(cmd, O_IP6, 0, 0); 3451 } else 3452 return add_proto0(cmd, av, protop); 3453 3454 *protop = proto; 3455 return cmd; 3456 } 3457 3458 static ipfw_insn * 3459 add_proto_compat(ipfw_insn *cmd, char *av, u_char *protop) 3460 { 3461 u_char proto = IPPROTO_IP; 3462 3463 if (_substrcmp(av, "all") == 0 || strcmp(av, "ip") == 0) 3464 ; /* do not set O_IP4 nor O_IP6 */ 3465 else if (strcmp(av, "ipv4") == 0 || strcmp(av, "ip4") == 0) 3466 /* explicit "just IPv4" rule */ 3467 fill_cmd(cmd, O_IP4, 0, 0); 3468 else if (strcmp(av, "ipv6") == 0 || strcmp(av, "ip6") == 0) { 3469 /* explicit "just IPv6" rule */ 3470 proto = IPPROTO_IPV6; 3471 fill_cmd(cmd, O_IP6, 0, 0); 3472 } else 3473 return add_proto0(cmd, av, protop); 3474 3475 *protop = proto; 3476 return cmd; 3477 } 3478 3479 static ipfw_insn * 3480 add_srcip(ipfw_insn *cmd, char *av, int cblen, struct tidx *tstate) 3481 { 3482 fill_ip((ipfw_insn_ip *)cmd, av, cblen, tstate); 3483 if (cmd->opcode == O_IP_DST_SET) /* set */ 3484 cmd->opcode = O_IP_SRC_SET; 3485 else if (cmd->opcode == O_IP_DST_LOOKUP) /* table */ 3486 cmd->opcode = O_IP_SRC_LOOKUP; 3487 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn)) /* me */ 3488 cmd->opcode = O_IP_SRC_ME; 3489 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_u32)) /* one IP */ 3490 cmd->opcode = O_IP_SRC; 3491 else /* addr/mask */ 3492 cmd->opcode = O_IP_SRC_MASK; 3493 return cmd; 3494 } 3495 3496 static ipfw_insn * 3497 add_dstip(ipfw_insn *cmd, char *av, int cblen, struct tidx *tstate) 3498 { 3499 fill_ip((ipfw_insn_ip *)cmd, av, cblen, tstate); 3500 if (cmd->opcode == O_IP_DST_SET) /* set */ 3501 ; 3502 else if (cmd->opcode == O_IP_DST_LOOKUP) /* table */ 3503 ; 3504 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn)) /* me */ 3505 cmd->opcode = O_IP_DST_ME; 3506 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_u32)) /* one IP */ 3507 cmd->opcode = O_IP_DST; 3508 else /* addr/mask */ 3509 cmd->opcode = O_IP_DST_MASK; 3510 return cmd; 3511 } 3512 3513 static struct _s_x f_reserved_keywords[] = { 3514 { "altq", TOK_OR }, 3515 { "//", TOK_OR }, 3516 { "diverted", TOK_OR }, 3517 { "dst-port", TOK_OR }, 3518 { "src-port", TOK_OR }, 3519 { "established", TOK_OR }, 3520 { "keep-state", TOK_OR }, 3521 { "frag", TOK_OR }, 3522 { "icmptypes", TOK_OR }, 3523 { "in", TOK_OR }, 3524 { "out", TOK_OR }, 3525 { "ip6", TOK_OR }, 3526 { "any", TOK_OR }, 3527 { "to", TOK_OR }, 3528 { "via", TOK_OR }, 3529 { "{", TOK_OR }, 3530 { NULL, 0 } /* terminator */ 3531 }; 3532 3533 static ipfw_insn * 3534 add_ports(ipfw_insn *cmd, char *av, u_char proto, int opcode, int cblen) 3535 { 3536 3537 if (match_token(f_reserved_keywords, av) != -1) 3538 return (NULL); 3539 3540 if (fill_newports((ipfw_insn_u16 *)cmd, av, proto, cblen)) { 3541 /* XXX todo: check that we have a protocol with ports */ 3542 cmd->opcode = opcode; 3543 return cmd; 3544 } 3545 return NULL; 3546 } 3547 3548 static ipfw_insn * 3549 add_src(ipfw_insn *cmd, char *av, u_char proto, int cblen, struct tidx *tstate) 3550 { 3551 struct in6_addr a; 3552 char *host, *ch, buf[INET6_ADDRSTRLEN]; 3553 ipfw_insn *ret = NULL; 3554 int len; 3555 3556 /* Copy first address in set if needed */ 3557 if ((ch = strpbrk(av, "/,")) != NULL) { 3558 len = ch - av; 3559 strlcpy(buf, av, sizeof(buf)); 3560 if (len < sizeof(buf)) 3561 buf[len] = '\0'; 3562 host = buf; 3563 } else 3564 host = av; 3565 3566 if (proto == IPPROTO_IPV6 || strcmp(av, "me6") == 0 || 3567 inet_pton(AF_INET6, host, &a) == 1) 3568 ret = add_srcip6(cmd, av, cblen); 3569 /* XXX: should check for IPv4, not !IPv6 */ 3570 if (ret == NULL && (proto == IPPROTO_IP || strcmp(av, "me") == 0 || 3571 inet_pton(AF_INET6, host, &a) != 1)) 3572 ret = add_srcip(cmd, av, cblen, tstate); 3573 if (ret == NULL && strcmp(av, "any") != 0) 3574 ret = cmd; 3575 3576 return ret; 3577 } 3578 3579 static ipfw_insn * 3580 add_dst(ipfw_insn *cmd, char *av, u_char proto, int cblen, struct tidx *tstate) 3581 { 3582 struct in6_addr a; 3583 char *host, *ch, buf[INET6_ADDRSTRLEN]; 3584 ipfw_insn *ret = NULL; 3585 int len; 3586 3587 /* Copy first address in set if needed */ 3588 if ((ch = strpbrk(av, "/,")) != NULL) { 3589 len = ch - av; 3590 strlcpy(buf, av, sizeof(buf)); 3591 if (len < sizeof(buf)) 3592 buf[len] = '\0'; 3593 host = buf; 3594 } else 3595 host = av; 3596 3597 if (proto == IPPROTO_IPV6 || strcmp(av, "me6") == 0 || 3598 inet_pton(AF_INET6, host, &a) == 1) 3599 ret = add_dstip6(cmd, av, cblen); 3600 /* XXX: should check for IPv4, not !IPv6 */ 3601 if (ret == NULL && (proto == IPPROTO_IP || strcmp(av, "me") == 0 || 3602 inet_pton(AF_INET6, host, &a) != 1)) 3603 ret = add_dstip(cmd, av, cblen, tstate); 3604 if (ret == NULL && strcmp(av, "any") != 0) 3605 ret = cmd; 3606 3607 return ret; 3608 } 3609 3610 /* 3611 * Parse arguments and assemble the microinstructions which make up a rule. 3612 * Rules are added into the 'rulebuf' and then copied in the correct order 3613 * into the actual rule. 3614 * 3615 * The syntax for a rule starts with the action, followed by 3616 * optional action parameters, and the various match patterns. 3617 * In the assembled microcode, the first opcode must be an O_PROBE_STATE 3618 * (generated if the rule includes a keep-state option), then the 3619 * various match patterns, log/altq actions, and the actual action. 3620 * 3621 */ 3622 void 3623 compile_rule(char *av[], uint32_t *rbuf, int *rbufsize, struct tidx *tstate) 3624 { 3625 /* 3626 * rules are added into the 'rulebuf' and then copied in 3627 * the correct order into the actual rule. 3628 * Some things that need to go out of order (prob, action etc.) 3629 * go into actbuf[]. 3630 */ 3631 static uint32_t actbuf[255], cmdbuf[255]; 3632 int rblen, ablen, cblen; 3633 3634 ipfw_insn *src, *dst, *cmd, *action, *prev=NULL; 3635 ipfw_insn *first_cmd; /* first match pattern */ 3636 3637 struct ip_fw_rule *rule; 3638 3639 /* 3640 * various flags used to record that we entered some fields. 3641 */ 3642 ipfw_insn *have_state = NULL; /* check-state or keep-state */ 3643 ipfw_insn *have_log = NULL, *have_altq = NULL, *have_tag = NULL; 3644 size_t len; 3645 3646 int i; 3647 3648 int open_par = 0; /* open parenthesis ( */ 3649 3650 /* proto is here because it is used to fetch ports */ 3651 u_char proto = IPPROTO_IP; /* default protocol */ 3652 3653 double match_prob = 1; /* match probability, default is always match */ 3654 3655 bzero(actbuf, sizeof(actbuf)); /* actions go here */ 3656 bzero(cmdbuf, sizeof(cmdbuf)); 3657 bzero(rbuf, *rbufsize); 3658 3659 rule = (struct ip_fw_rule *)rbuf; 3660 cmd = (ipfw_insn *)cmdbuf; 3661 action = (ipfw_insn *)actbuf; 3662 3663 rblen = *rbufsize / sizeof(uint32_t); 3664 rblen -= sizeof(struct ip_fw_rule) / sizeof(uint32_t); 3665 ablen = sizeof(actbuf) / sizeof(actbuf[0]); 3666 cblen = sizeof(cmdbuf) / sizeof(cmdbuf[0]); 3667 cblen -= F_INSN_SIZE(ipfw_insn_u32) + 1; 3668 3669 #define CHECK_RBUFLEN(len) { CHECK_LENGTH(rblen, len); rblen -= len; } 3670 #define CHECK_ACTLEN CHECK_LENGTH(ablen, action->len) 3671 3672 av++; 3673 3674 /* [rule N] -- Rule number optional */ 3675 if (av[0] && isdigit(**av)) { 3676 rule->rulenum = atoi(*av); 3677 av++; 3678 } 3679 3680 /* [set N] -- set number (0..RESVD_SET), optional */ 3681 if (av[0] && av[1] && _substrcmp(*av, "set") == 0) { 3682 int set = strtoul(av[1], NULL, 10); 3683 if (set < 0 || set > RESVD_SET) 3684 errx(EX_DATAERR, "illegal set %s", av[1]); 3685 rule->set = set; 3686 tstate->set = set; 3687 av += 2; 3688 } 3689 3690 /* [prob D] -- match probability, optional */ 3691 if (av[0] && av[1] && _substrcmp(*av, "prob") == 0) { 3692 match_prob = strtod(av[1], NULL); 3693 3694 if (match_prob <= 0 || match_prob > 1) 3695 errx(EX_DATAERR, "illegal match prob. %s", av[1]); 3696 av += 2; 3697 } 3698 3699 /* action -- mandatory */ 3700 NEED1("missing action"); 3701 i = match_token(rule_actions, *av); 3702 av++; 3703 action->len = 1; /* default */ 3704 CHECK_ACTLEN; 3705 switch(i) { 3706 case TOK_CHECKSTATE: 3707 have_state = action; 3708 action->opcode = O_CHECK_STATE; 3709 if (*av == NULL) { 3710 action->arg1 = pack_object(tstate, 3711 default_state_name, IPFW_TLV_STATE_NAME); 3712 break; 3713 } 3714 if (strcmp(*av, "any") == 0) 3715 action->arg1 = 0; 3716 else if (match_token(rule_options, *av) != -1) { 3717 action->arg1 = pack_object(tstate, 3718 default_state_name, IPFW_TLV_STATE_NAME); 3719 warn("Ambiguous state name '%s', '%s' used instead.\n", 3720 *av, default_state_name); 3721 } else if (state_check_name(*av) == 0) 3722 action->arg1 = pack_object(tstate, *av, 3723 IPFW_TLV_STATE_NAME); 3724 else 3725 errx(EX_DATAERR, "Invalid state name %s", *av); 3726 av++; 3727 break; 3728 3729 case TOK_ACCEPT: 3730 action->opcode = O_ACCEPT; 3731 break; 3732 3733 case TOK_DENY: 3734 action->opcode = O_DENY; 3735 action->arg1 = 0; 3736 break; 3737 3738 case TOK_REJECT: 3739 action->opcode = O_REJECT; 3740 action->arg1 = ICMP_UNREACH_HOST; 3741 break; 3742 3743 case TOK_RESET: 3744 action->opcode = O_REJECT; 3745 action->arg1 = ICMP_REJECT_RST; 3746 break; 3747 3748 case TOK_RESET6: 3749 action->opcode = O_UNREACH6; 3750 action->arg1 = ICMP6_UNREACH_RST; 3751 break; 3752 3753 case TOK_UNREACH: 3754 action->opcode = O_REJECT; 3755 NEED1("missing reject code"); 3756 fill_reject_code(&action->arg1, *av); 3757 av++; 3758 break; 3759 3760 case TOK_UNREACH6: 3761 action->opcode = O_UNREACH6; 3762 NEED1("missing unreach code"); 3763 fill_unreach6_code(&action->arg1, *av); 3764 av++; 3765 break; 3766 3767 case TOK_COUNT: 3768 action->opcode = O_COUNT; 3769 break; 3770 3771 case TOK_NAT: 3772 action->opcode = O_NAT; 3773 action->len = F_INSN_SIZE(ipfw_insn_nat); 3774 CHECK_ACTLEN; 3775 if (*av != NULL && _substrcmp(*av, "global") == 0) { 3776 action->arg1 = 0; 3777 av++; 3778 break; 3779 } else 3780 goto chkarg; 3781 case TOK_QUEUE: 3782 action->opcode = O_QUEUE; 3783 goto chkarg; 3784 case TOK_PIPE: 3785 action->opcode = O_PIPE; 3786 goto chkarg; 3787 case TOK_SKIPTO: 3788 action->opcode = O_SKIPTO; 3789 goto chkarg; 3790 case TOK_NETGRAPH: 3791 action->opcode = O_NETGRAPH; 3792 goto chkarg; 3793 case TOK_NGTEE: 3794 action->opcode = O_NGTEE; 3795 goto chkarg; 3796 case TOK_DIVERT: 3797 action->opcode = O_DIVERT; 3798 goto chkarg; 3799 case TOK_TEE: 3800 action->opcode = O_TEE; 3801 goto chkarg; 3802 case TOK_CALL: 3803 action->opcode = O_CALLRETURN; 3804 chkarg: 3805 if (!av[0]) 3806 errx(EX_USAGE, "missing argument for %s", *(av - 1)); 3807 if (isdigit(**av)) { 3808 action->arg1 = strtoul(*av, NULL, 10); 3809 if (action->arg1 <= 0 || action->arg1 >= IP_FW_TABLEARG) 3810 errx(EX_DATAERR, "illegal argument for %s", 3811 *(av - 1)); 3812 } else if (_substrcmp(*av, "tablearg") == 0) { 3813 action->arg1 = IP_FW_TARG; 3814 } else if (i == TOK_DIVERT || i == TOK_TEE) { 3815 struct servent *s; 3816 setservent(1); 3817 s = getservbyname(av[0], "divert"); 3818 if (s != NULL) 3819 action->arg1 = ntohs(s->s_port); 3820 else 3821 errx(EX_DATAERR, "illegal divert/tee port"); 3822 } else 3823 errx(EX_DATAERR, "illegal argument for %s", *(av - 1)); 3824 av++; 3825 break; 3826 3827 case TOK_FORWARD: { 3828 /* 3829 * Locate the address-port separator (':' or ','). 3830 * Could be one of the following: 3831 * hostname:port 3832 * IPv4 a.b.c.d,port 3833 * IPv4 a.b.c.d:port 3834 * IPv6 w:x:y::z,port 3835 * The ':' can only be used with hostname and IPv4 address. 3836 * XXX-BZ Should we also support [w:x:y::z]:port? 3837 */ 3838 struct sockaddr_storage result; 3839 struct addrinfo *res; 3840 char *s, *end; 3841 int family; 3842 u_short port_number; 3843 3844 NEED1("missing forward address[:port]"); 3845 3846 /* 3847 * locate the address-port separator (':' or ',') 3848 */ 3849 s = strchr(*av, ','); 3850 if (s == NULL) { 3851 /* Distinguish between IPv4:port and IPv6 cases. */ 3852 s = strchr(*av, ':'); 3853 if (s && strchr(s+1, ':')) 3854 s = NULL; /* no port */ 3855 } 3856 3857 port_number = 0; 3858 if (s != NULL) { 3859 /* Terminate host portion and set s to start of port. */ 3860 *(s++) = '\0'; 3861 i = strtoport(s, &end, 0 /* base */, 0 /* proto */); 3862 if (s == end) 3863 errx(EX_DATAERR, 3864 "illegal forwarding port ``%s''", s); 3865 port_number = (u_short)i; 3866 } 3867 3868 if (_substrcmp(*av, "tablearg") == 0) { 3869 family = PF_INET; 3870 ((struct sockaddr_in*)&result)->sin_addr.s_addr = 3871 INADDR_ANY; 3872 } else { 3873 /* 3874 * Resolve the host name or address to a family and a 3875 * network representation of the address. 3876 */ 3877 if (getaddrinfo(*av, NULL, NULL, &res)) 3878 errx(EX_DATAERR, NULL); 3879 /* Just use the first host in the answer. */ 3880 family = res->ai_family; 3881 memcpy(&result, res->ai_addr, res->ai_addrlen); 3882 freeaddrinfo(res); 3883 } 3884 3885 if (family == PF_INET) { 3886 ipfw_insn_sa *p = (ipfw_insn_sa *)action; 3887 3888 action->opcode = O_FORWARD_IP; 3889 action->len = F_INSN_SIZE(ipfw_insn_sa); 3890 CHECK_ACTLEN; 3891 3892 /* 3893 * In the kernel we assume AF_INET and use only 3894 * sin_port and sin_addr. Remember to set sin_len as 3895 * the routing code seems to use it too. 3896 */ 3897 p->sa.sin_len = sizeof(struct sockaddr_in); 3898 p->sa.sin_family = AF_INET; 3899 p->sa.sin_port = port_number; 3900 p->sa.sin_addr.s_addr = 3901 ((struct sockaddr_in *)&result)->sin_addr.s_addr; 3902 } else if (family == PF_INET6) { 3903 ipfw_insn_sa6 *p = (ipfw_insn_sa6 *)action; 3904 3905 action->opcode = O_FORWARD_IP6; 3906 action->len = F_INSN_SIZE(ipfw_insn_sa6); 3907 CHECK_ACTLEN; 3908 3909 p->sa.sin6_len = sizeof(struct sockaddr_in6); 3910 p->sa.sin6_family = AF_INET6; 3911 p->sa.sin6_port = port_number; 3912 p->sa.sin6_flowinfo = 0; 3913 p->sa.sin6_scope_id = 3914 ((struct sockaddr_in6 *)&result)->sin6_scope_id; 3915 bcopy(&((struct sockaddr_in6*)&result)->sin6_addr, 3916 &p->sa.sin6_addr, sizeof(p->sa.sin6_addr)); 3917 } else { 3918 errx(EX_DATAERR, "Invalid address family in forward action"); 3919 } 3920 av++; 3921 break; 3922 } 3923 case TOK_COMMENT: 3924 /* pretend it is a 'count' rule followed by the comment */ 3925 action->opcode = O_COUNT; 3926 av--; /* go back... */ 3927 break; 3928 3929 case TOK_SETFIB: 3930 { 3931 int numfibs; 3932 size_t intsize = sizeof(int); 3933 3934 action->opcode = O_SETFIB; 3935 NEED1("missing fib number"); 3936 if (_substrcmp(*av, "tablearg") == 0) { 3937 action->arg1 = IP_FW_TARG; 3938 } else { 3939 action->arg1 = strtoul(*av, NULL, 10); 3940 if (sysctlbyname("net.fibs", &numfibs, &intsize, 3941 NULL, 0) == -1) 3942 errx(EX_DATAERR, "fibs not suported.\n"); 3943 if (action->arg1 >= numfibs) /* Temporary */ 3944 errx(EX_DATAERR, "fib too large.\n"); 3945 /* Add high-order bit to fib to make room for tablearg*/ 3946 action->arg1 |= 0x8000; 3947 } 3948 av++; 3949 break; 3950 } 3951 3952 case TOK_SETDSCP: 3953 { 3954 int code; 3955 3956 action->opcode = O_SETDSCP; 3957 NEED1("missing DSCP code"); 3958 if (_substrcmp(*av, "tablearg") == 0) { 3959 action->arg1 = IP_FW_TARG; 3960 } else if (isalpha(*av[0])) { 3961 if ((code = match_token(f_ipdscp, *av)) == -1) 3962 errx(EX_DATAERR, "Unknown DSCP code"); 3963 action->arg1 = code; 3964 } else 3965 action->arg1 = strtoul(*av, NULL, 10); 3966 /* Add high-order bit to DSCP to make room for tablearg */ 3967 if (action->arg1 != IP_FW_TARG) 3968 action->arg1 |= 0x8000; 3969 av++; 3970 break; 3971 } 3972 3973 case TOK_REASS: 3974 action->opcode = O_REASS; 3975 break; 3976 3977 case TOK_RETURN: 3978 fill_cmd(action, O_CALLRETURN, F_NOT, 0); 3979 break; 3980 3981 default: 3982 av--; 3983 if (match_token(rule_eactions, *av) == -1) 3984 errx(EX_DATAERR, "invalid action %s\n", *av); 3985 /* 3986 * External actions support. 3987 * XXX: we support only syntax with instance name. 3988 * For known external actions (from rule_eactions list) 3989 * we can handle syntax directly. But with `eaction' 3990 * keyword we can use only `eaction <name> <instance>' 3991 * syntax. 3992 */ 3993 case TOK_EACTION: { 3994 uint16_t idx; 3995 3996 NEED1("Missing eaction name"); 3997 if (eaction_check_name(*av) != 0) 3998 errx(EX_DATAERR, "Invalid eaction name %s", *av); 3999 idx = pack_object(tstate, *av, IPFW_TLV_EACTION); 4000 if (idx == 0) 4001 errx(EX_DATAERR, "pack_object failed"); 4002 fill_cmd(action, O_EXTERNAL_ACTION, 0, idx); 4003 av++; 4004 NEED1("Missing eaction instance name"); 4005 action = next_cmd(action, &ablen); 4006 action->len = 1; 4007 CHECK_ACTLEN; 4008 if (eaction_check_name(*av) != 0) 4009 errx(EX_DATAERR, "Invalid eaction instance name %s", 4010 *av); 4011 /* 4012 * External action instance object has TLV type depended 4013 * from the external action name object index. Since we 4014 * currently don't know this index, use zero as TLV type. 4015 */ 4016 idx = pack_object(tstate, *av, 0); 4017 if (idx == 0) 4018 errx(EX_DATAERR, "pack_object failed"); 4019 fill_cmd(action, O_EXTERNAL_INSTANCE, 0, idx); 4020 av++; 4021 } 4022 } 4023 action = next_cmd(action, &ablen); 4024 4025 /* 4026 * [altq queuename] -- altq tag, optional 4027 * [log [logamount N]] -- log, optional 4028 * 4029 * If they exist, it go first in the cmdbuf, but then it is 4030 * skipped in the copy section to the end of the buffer. 4031 */ 4032 while (av[0] != NULL && (i = match_token(rule_action_params, *av)) != -1) { 4033 av++; 4034 switch (i) { 4035 case TOK_LOG: 4036 { 4037 ipfw_insn_log *c = (ipfw_insn_log *)cmd; 4038 int l; 4039 4040 if (have_log) 4041 errx(EX_DATAERR, 4042 "log cannot be specified more than once"); 4043 have_log = (ipfw_insn *)c; 4044 cmd->len = F_INSN_SIZE(ipfw_insn_log); 4045 CHECK_CMDLEN; 4046 cmd->opcode = O_LOG; 4047 if (av[0] && _substrcmp(*av, "logamount") == 0) { 4048 av++; 4049 NEED1("logamount requires argument"); 4050 l = atoi(*av); 4051 if (l < 0) 4052 errx(EX_DATAERR, 4053 "logamount must be positive"); 4054 c->max_log = l; 4055 av++; 4056 } else { 4057 len = sizeof(c->max_log); 4058 if (sysctlbyname("net.inet.ip.fw.verbose_limit", 4059 &c->max_log, &len, NULL, 0) == -1) { 4060 if (co.test_only) { 4061 c->max_log = 0; 4062 break; 4063 } 4064 errx(1, "sysctlbyname(\"%s\")", 4065 "net.inet.ip.fw.verbose_limit"); 4066 } 4067 } 4068 } 4069 break; 4070 4071 #ifndef NO_ALTQ 4072 case TOK_ALTQ: 4073 { 4074 ipfw_insn_altq *a = (ipfw_insn_altq *)cmd; 4075 4076 NEED1("missing altq queue name"); 4077 if (have_altq) 4078 errx(EX_DATAERR, 4079 "altq cannot be specified more than once"); 4080 have_altq = (ipfw_insn *)a; 4081 cmd->len = F_INSN_SIZE(ipfw_insn_altq); 4082 CHECK_CMDLEN; 4083 cmd->opcode = O_ALTQ; 4084 a->qid = altq_name_to_qid(*av); 4085 av++; 4086 } 4087 break; 4088 #endif 4089 4090 case TOK_TAG: 4091 case TOK_UNTAG: { 4092 uint16_t tag; 4093 4094 if (have_tag) 4095 errx(EX_USAGE, "tag and untag cannot be " 4096 "specified more than once"); 4097 GET_UINT_ARG(tag, IPFW_ARG_MIN, IPFW_ARG_MAX, i, 4098 rule_action_params); 4099 have_tag = cmd; 4100 fill_cmd(cmd, O_TAG, (i == TOK_TAG) ? 0: F_NOT, tag); 4101 av++; 4102 break; 4103 } 4104 4105 default: 4106 abort(); 4107 } 4108 cmd = next_cmd(cmd, &cblen); 4109 } 4110 4111 if (have_state) /* must be a check-state, we are done */ 4112 goto done; 4113 4114 #define OR_START(target) \ 4115 if (av[0] && (*av[0] == '(' || *av[0] == '{')) { \ 4116 if (open_par) \ 4117 errx(EX_USAGE, "nested \"(\" not allowed\n"); \ 4118 prev = NULL; \ 4119 open_par = 1; \ 4120 if ( (av[0])[1] == '\0') { \ 4121 av++; \ 4122 } else \ 4123 (*av)++; \ 4124 } \ 4125 target: \ 4126 4127 4128 #define CLOSE_PAR \ 4129 if (open_par) { \ 4130 if (av[0] && ( \ 4131 strcmp(*av, ")") == 0 || \ 4132 strcmp(*av, "}") == 0)) { \ 4133 prev = NULL; \ 4134 open_par = 0; \ 4135 av++; \ 4136 } else \ 4137 errx(EX_USAGE, "missing \")\"\n"); \ 4138 } 4139 4140 #define NOT_BLOCK \ 4141 if (av[0] && _substrcmp(*av, "not") == 0) { \ 4142 if (cmd->len & F_NOT) \ 4143 errx(EX_USAGE, "double \"not\" not allowed\n"); \ 4144 cmd->len |= F_NOT; \ 4145 av++; \ 4146 } 4147 4148 #define OR_BLOCK(target) \ 4149 if (av[0] && _substrcmp(*av, "or") == 0) { \ 4150 if (prev == NULL || open_par == 0) \ 4151 errx(EX_DATAERR, "invalid OR block"); \ 4152 prev->len |= F_OR; \ 4153 av++; \ 4154 goto target; \ 4155 } \ 4156 CLOSE_PAR; 4157 4158 first_cmd = cmd; 4159 4160 #if 0 4161 /* 4162 * MAC addresses, optional. 4163 * If we have this, we skip the part "proto from src to dst" 4164 * and jump straight to the option parsing. 4165 */ 4166 NOT_BLOCK; 4167 NEED1("missing protocol"); 4168 if (_substrcmp(*av, "MAC") == 0 || 4169 _substrcmp(*av, "mac") == 0) { 4170 av++; /* the "MAC" keyword */ 4171 add_mac(cmd, av); /* exits in case of errors */ 4172 cmd = next_cmd(cmd); 4173 av += 2; /* dst-mac and src-mac */ 4174 NOT_BLOCK; 4175 NEED1("missing mac type"); 4176 if (add_mactype(cmd, av[0])) 4177 cmd = next_cmd(cmd); 4178 av++; /* any or mac-type */ 4179 goto read_options; 4180 } 4181 #endif 4182 4183 /* 4184 * protocol, mandatory 4185 */ 4186 OR_START(get_proto); 4187 NOT_BLOCK; 4188 NEED1("missing protocol"); 4189 if (add_proto_compat(cmd, *av, &proto)) { 4190 av++; 4191 if (F_LEN(cmd) != 0) { 4192 prev = cmd; 4193 cmd = next_cmd(cmd, &cblen); 4194 } 4195 } else if (first_cmd != cmd) { 4196 errx(EX_DATAERR, "invalid protocol ``%s''", *av); 4197 } else 4198 goto read_options; 4199 OR_BLOCK(get_proto); 4200 4201 /* 4202 * "from", mandatory 4203 */ 4204 if ((av[0] == NULL) || _substrcmp(*av, "from") != 0) 4205 errx(EX_USAGE, "missing ``from''"); 4206 av++; 4207 4208 /* 4209 * source IP, mandatory 4210 */ 4211 OR_START(source_ip); 4212 NOT_BLOCK; /* optional "not" */ 4213 NEED1("missing source address"); 4214 if (add_src(cmd, *av, proto, cblen, tstate)) { 4215 av++; 4216 if (F_LEN(cmd) != 0) { /* ! any */ 4217 prev = cmd; 4218 cmd = next_cmd(cmd, &cblen); 4219 } 4220 } else 4221 errx(EX_USAGE, "bad source address %s", *av); 4222 OR_BLOCK(source_ip); 4223 4224 /* 4225 * source ports, optional 4226 */ 4227 NOT_BLOCK; /* optional "not" */ 4228 if ( av[0] != NULL ) { 4229 if (_substrcmp(*av, "any") == 0 || 4230 add_ports(cmd, *av, proto, O_IP_SRCPORT, cblen)) { 4231 av++; 4232 if (F_LEN(cmd) != 0) 4233 cmd = next_cmd(cmd, &cblen); 4234 } 4235 } 4236 4237 /* 4238 * "to", mandatory 4239 */ 4240 if ( (av[0] == NULL) || _substrcmp(*av, "to") != 0 ) 4241 errx(EX_USAGE, "missing ``to''"); 4242 av++; 4243 4244 /* 4245 * destination, mandatory 4246 */ 4247 OR_START(dest_ip); 4248 NOT_BLOCK; /* optional "not" */ 4249 NEED1("missing dst address"); 4250 if (add_dst(cmd, *av, proto, cblen, tstate)) { 4251 av++; 4252 if (F_LEN(cmd) != 0) { /* ! any */ 4253 prev = cmd; 4254 cmd = next_cmd(cmd, &cblen); 4255 } 4256 } else 4257 errx( EX_USAGE, "bad destination address %s", *av); 4258 OR_BLOCK(dest_ip); 4259 4260 /* 4261 * dest. ports, optional 4262 */ 4263 NOT_BLOCK; /* optional "not" */ 4264 if (av[0]) { 4265 if (_substrcmp(*av, "any") == 0 || 4266 add_ports(cmd, *av, proto, O_IP_DSTPORT, cblen)) { 4267 av++; 4268 if (F_LEN(cmd) != 0) 4269 cmd = next_cmd(cmd, &cblen); 4270 } 4271 } 4272 4273 read_options: 4274 if (av[0] && first_cmd == cmd) { 4275 /* 4276 * nothing specified so far, store in the rule to ease 4277 * printout later. 4278 */ 4279 rule->flags |= IPFW_RULE_NOOPT; 4280 } 4281 prev = NULL; 4282 while ( av[0] != NULL ) { 4283 char *s; 4284 ipfw_insn_u32 *cmd32; /* alias for cmd */ 4285 4286 s = *av; 4287 cmd32 = (ipfw_insn_u32 *)cmd; 4288 4289 if (*s == '!') { /* alternate syntax for NOT */ 4290 if (cmd->len & F_NOT) 4291 errx(EX_USAGE, "double \"not\" not allowed\n"); 4292 cmd->len = F_NOT; 4293 s++; 4294 } 4295 i = match_token(rule_options, s); 4296 av++; 4297 switch(i) { 4298 case TOK_NOT: 4299 if (cmd->len & F_NOT) 4300 errx(EX_USAGE, "double \"not\" not allowed\n"); 4301 cmd->len = F_NOT; 4302 break; 4303 4304 case TOK_OR: 4305 if (open_par == 0 || prev == NULL) 4306 errx(EX_USAGE, "invalid \"or\" block\n"); 4307 prev->len |= F_OR; 4308 break; 4309 4310 case TOK_STARTBRACE: 4311 if (open_par) 4312 errx(EX_USAGE, "+nested \"(\" not allowed\n"); 4313 open_par = 1; 4314 break; 4315 4316 case TOK_ENDBRACE: 4317 if (!open_par) 4318 errx(EX_USAGE, "+missing \")\"\n"); 4319 open_par = 0; 4320 prev = NULL; 4321 break; 4322 4323 case TOK_IN: 4324 fill_cmd(cmd, O_IN, 0, 0); 4325 break; 4326 4327 case TOK_OUT: 4328 cmd->len ^= F_NOT; /* toggle F_NOT */ 4329 fill_cmd(cmd, O_IN, 0, 0); 4330 break; 4331 4332 case TOK_DIVERTED: 4333 fill_cmd(cmd, O_DIVERTED, 0, 3); 4334 break; 4335 4336 case TOK_DIVERTEDLOOPBACK: 4337 fill_cmd(cmd, O_DIVERTED, 0, 1); 4338 break; 4339 4340 case TOK_DIVERTEDOUTPUT: 4341 fill_cmd(cmd, O_DIVERTED, 0, 2); 4342 break; 4343 4344 case TOK_FRAG: 4345 fill_cmd(cmd, O_FRAG, 0, 0); 4346 break; 4347 4348 case TOK_LAYER2: 4349 fill_cmd(cmd, O_LAYER2, 0, 0); 4350 break; 4351 4352 case TOK_XMIT: 4353 case TOK_RECV: 4354 case TOK_VIA: 4355 NEED1("recv, xmit, via require interface name" 4356 " or address"); 4357 fill_iface((ipfw_insn_if *)cmd, av[0], cblen, tstate); 4358 av++; 4359 if (F_LEN(cmd) == 0) /* not a valid address */ 4360 break; 4361 if (i == TOK_XMIT) 4362 cmd->opcode = O_XMIT; 4363 else if (i == TOK_RECV) 4364 cmd->opcode = O_RECV; 4365 else if (i == TOK_VIA) 4366 cmd->opcode = O_VIA; 4367 break; 4368 4369 case TOK_ICMPTYPES: 4370 NEED1("icmptypes requires list of types"); 4371 fill_icmptypes((ipfw_insn_u32 *)cmd, *av); 4372 av++; 4373 break; 4374 4375 case TOK_ICMP6TYPES: 4376 NEED1("icmptypes requires list of types"); 4377 fill_icmp6types((ipfw_insn_icmp6 *)cmd, *av, cblen); 4378 av++; 4379 break; 4380 4381 case TOK_IPTTL: 4382 NEED1("ipttl requires TTL"); 4383 if (strpbrk(*av, "-,")) { 4384 if (!add_ports(cmd, *av, 0, O_IPTTL, cblen)) 4385 errx(EX_DATAERR, "invalid ipttl %s", *av); 4386 } else 4387 fill_cmd(cmd, O_IPTTL, 0, strtoul(*av, NULL, 0)); 4388 av++; 4389 break; 4390 4391 case TOK_IPID: 4392 NEED1("ipid requires id"); 4393 if (strpbrk(*av, "-,")) { 4394 if (!add_ports(cmd, *av, 0, O_IPID, cblen)) 4395 errx(EX_DATAERR, "invalid ipid %s", *av); 4396 } else 4397 fill_cmd(cmd, O_IPID, 0, strtoul(*av, NULL, 0)); 4398 av++; 4399 break; 4400 4401 case TOK_IPLEN: 4402 NEED1("iplen requires length"); 4403 if (strpbrk(*av, "-,")) { 4404 if (!add_ports(cmd, *av, 0, O_IPLEN, cblen)) 4405 errx(EX_DATAERR, "invalid ip len %s", *av); 4406 } else 4407 fill_cmd(cmd, O_IPLEN, 0, strtoul(*av, NULL, 0)); 4408 av++; 4409 break; 4410 4411 case TOK_IPVER: 4412 NEED1("ipver requires version"); 4413 fill_cmd(cmd, O_IPVER, 0, strtoul(*av, NULL, 0)); 4414 av++; 4415 break; 4416 4417 case TOK_IPPRECEDENCE: 4418 NEED1("ipprecedence requires value"); 4419 fill_cmd(cmd, O_IPPRECEDENCE, 0, 4420 (strtoul(*av, NULL, 0) & 7) << 5); 4421 av++; 4422 break; 4423 4424 case TOK_DSCP: 4425 NEED1("missing DSCP code"); 4426 fill_dscp(cmd, *av, cblen); 4427 av++; 4428 break; 4429 4430 case TOK_IPOPTS: 4431 NEED1("missing argument for ipoptions"); 4432 fill_flags_cmd(cmd, O_IPOPT, f_ipopts, *av); 4433 av++; 4434 break; 4435 4436 case TOK_IPTOS: 4437 NEED1("missing argument for iptos"); 4438 fill_flags_cmd(cmd, O_IPTOS, f_iptos, *av); 4439 av++; 4440 break; 4441 4442 case TOK_UID: 4443 NEED1("uid requires argument"); 4444 { 4445 char *end; 4446 uid_t uid; 4447 struct passwd *pwd; 4448 4449 cmd->opcode = O_UID; 4450 uid = strtoul(*av, &end, 0); 4451 pwd = (*end == '\0') ? getpwuid(uid) : getpwnam(*av); 4452 if (pwd == NULL) 4453 errx(EX_DATAERR, "uid \"%s\" nonexistent", *av); 4454 cmd32->d[0] = pwd->pw_uid; 4455 cmd->len |= F_INSN_SIZE(ipfw_insn_u32); 4456 av++; 4457 } 4458 break; 4459 4460 case TOK_GID: 4461 NEED1("gid requires argument"); 4462 { 4463 char *end; 4464 gid_t gid; 4465 struct group *grp; 4466 4467 cmd->opcode = O_GID; 4468 gid = strtoul(*av, &end, 0); 4469 grp = (*end == '\0') ? getgrgid(gid) : getgrnam(*av); 4470 if (grp == NULL) 4471 errx(EX_DATAERR, "gid \"%s\" nonexistent", *av); 4472 cmd32->d[0] = grp->gr_gid; 4473 cmd->len |= F_INSN_SIZE(ipfw_insn_u32); 4474 av++; 4475 } 4476 break; 4477 4478 case TOK_JAIL: 4479 NEED1("jail requires argument"); 4480 { 4481 char *end; 4482 int jid; 4483 4484 cmd->opcode = O_JAIL; 4485 jid = (int)strtol(*av, &end, 0); 4486 if (jid < 0 || *end != '\0') 4487 errx(EX_DATAERR, "jail requires prison ID"); 4488 cmd32->d[0] = (uint32_t)jid; 4489 cmd->len |= F_INSN_SIZE(ipfw_insn_u32); 4490 av++; 4491 } 4492 break; 4493 4494 case TOK_ESTAB: 4495 fill_cmd(cmd, O_ESTAB, 0, 0); 4496 break; 4497 4498 case TOK_SETUP: 4499 fill_cmd(cmd, O_TCPFLAGS, 0, 4500 (TH_SYN) | ( (TH_ACK) & 0xff) <<8 ); 4501 break; 4502 4503 case TOK_TCPDATALEN: 4504 NEED1("tcpdatalen requires length"); 4505 if (strpbrk(*av, "-,")) { 4506 if (!add_ports(cmd, *av, 0, O_TCPDATALEN, cblen)) 4507 errx(EX_DATAERR, "invalid tcpdata len %s", *av); 4508 } else 4509 fill_cmd(cmd, O_TCPDATALEN, 0, 4510 strtoul(*av, NULL, 0)); 4511 av++; 4512 break; 4513 4514 case TOK_TCPOPTS: 4515 NEED1("missing argument for tcpoptions"); 4516 fill_flags_cmd(cmd, O_TCPOPTS, f_tcpopts, *av); 4517 av++; 4518 break; 4519 4520 case TOK_TCPSEQ: 4521 case TOK_TCPACK: 4522 NEED1("tcpseq/tcpack requires argument"); 4523 cmd->len = F_INSN_SIZE(ipfw_insn_u32); 4524 cmd->opcode = (i == TOK_TCPSEQ) ? O_TCPSEQ : O_TCPACK; 4525 cmd32->d[0] = htonl(strtoul(*av, NULL, 0)); 4526 av++; 4527 break; 4528 4529 case TOK_TCPWIN: 4530 NEED1("tcpwin requires length"); 4531 if (strpbrk(*av, "-,")) { 4532 if (!add_ports(cmd, *av, 0, O_TCPWIN, cblen)) 4533 errx(EX_DATAERR, "invalid tcpwin len %s", *av); 4534 } else 4535 fill_cmd(cmd, O_TCPWIN, 0, 4536 strtoul(*av, NULL, 0)); 4537 av++; 4538 break; 4539 4540 case TOK_TCPFLAGS: 4541 NEED1("missing argument for tcpflags"); 4542 cmd->opcode = O_TCPFLAGS; 4543 fill_flags_cmd(cmd, O_TCPFLAGS, f_tcpflags, *av); 4544 av++; 4545 break; 4546 4547 case TOK_KEEPSTATE: { 4548 uint16_t uidx; 4549 4550 if (open_par) 4551 errx(EX_USAGE, "keep-state cannot be part " 4552 "of an or block"); 4553 if (have_state) 4554 errx(EX_USAGE, "only one of keep-state " 4555 "and limit is allowed"); 4556 if (*av == NULL || 4557 match_token(rule_options, *av) != -1) { 4558 if (*av != NULL) 4559 warn("Ambiguous state name '%s'," 4560 " '%s' used instead.\n", *av, 4561 default_state_name); 4562 uidx = pack_object(tstate, default_state_name, 4563 IPFW_TLV_STATE_NAME); 4564 } else { 4565 if (state_check_name(*av) != 0) 4566 errx(EX_DATAERR, 4567 "Invalid state name %s", *av); 4568 uidx = pack_object(tstate, *av, 4569 IPFW_TLV_STATE_NAME); 4570 av++; 4571 } 4572 have_state = cmd; 4573 fill_cmd(cmd, O_KEEP_STATE, 0, uidx); 4574 break; 4575 } 4576 4577 case TOK_LIMIT: { 4578 ipfw_insn_limit *c = (ipfw_insn_limit *)cmd; 4579 int val; 4580 4581 if (open_par) 4582 errx(EX_USAGE, 4583 "limit cannot be part of an or block"); 4584 if (have_state) 4585 errx(EX_USAGE, "only one of keep-state and " 4586 "limit is allowed"); 4587 have_state = cmd; 4588 4589 cmd->len = F_INSN_SIZE(ipfw_insn_limit); 4590 CHECK_CMDLEN; 4591 cmd->opcode = O_LIMIT; 4592 c->limit_mask = c->conn_limit = 0; 4593 4594 while ( av[0] != NULL ) { 4595 if ((val = match_token(limit_masks, *av)) <= 0) 4596 break; 4597 c->limit_mask |= val; 4598 av++; 4599 } 4600 4601 if (c->limit_mask == 0) 4602 errx(EX_USAGE, "limit: missing limit mask"); 4603 4604 GET_UINT_ARG(c->conn_limit, IPFW_ARG_MIN, IPFW_ARG_MAX, 4605 TOK_LIMIT, rule_options); 4606 av++; 4607 4608 if (*av == NULL || 4609 match_token(rule_options, *av) != -1) { 4610 if (*av != NULL) 4611 warn("Ambiguous state name '%s'," 4612 " '%s' used instead.\n", *av, 4613 default_state_name); 4614 cmd->arg1 = pack_object(tstate, 4615 default_state_name, IPFW_TLV_STATE_NAME); 4616 } else { 4617 if (state_check_name(*av) != 0) 4618 errx(EX_DATAERR, 4619 "Invalid state name %s", *av); 4620 cmd->arg1 = pack_object(tstate, *av, 4621 IPFW_TLV_STATE_NAME); 4622 av++; 4623 } 4624 break; 4625 } 4626 4627 case TOK_PROTO: 4628 NEED1("missing protocol"); 4629 if (add_proto(cmd, *av, &proto)) { 4630 av++; 4631 } else 4632 errx(EX_DATAERR, "invalid protocol ``%s''", 4633 *av); 4634 break; 4635 4636 case TOK_SRCIP: 4637 NEED1("missing source IP"); 4638 if (add_srcip(cmd, *av, cblen, tstate)) { 4639 av++; 4640 } 4641 break; 4642 4643 case TOK_DSTIP: 4644 NEED1("missing destination IP"); 4645 if (add_dstip(cmd, *av, cblen, tstate)) { 4646 av++; 4647 } 4648 break; 4649 4650 case TOK_SRCIP6: 4651 NEED1("missing source IP6"); 4652 if (add_srcip6(cmd, *av, cblen)) { 4653 av++; 4654 } 4655 break; 4656 4657 case TOK_DSTIP6: 4658 NEED1("missing destination IP6"); 4659 if (add_dstip6(cmd, *av, cblen)) { 4660 av++; 4661 } 4662 break; 4663 4664 case TOK_SRCPORT: 4665 NEED1("missing source port"); 4666 if (_substrcmp(*av, "any") == 0 || 4667 add_ports(cmd, *av, proto, O_IP_SRCPORT, cblen)) { 4668 av++; 4669 } else 4670 errx(EX_DATAERR, "invalid source port %s", *av); 4671 break; 4672 4673 case TOK_DSTPORT: 4674 NEED1("missing destination port"); 4675 if (_substrcmp(*av, "any") == 0 || 4676 add_ports(cmd, *av, proto, O_IP_DSTPORT, cblen)) { 4677 av++; 4678 } else 4679 errx(EX_DATAERR, "invalid destination port %s", 4680 *av); 4681 break; 4682 4683 case TOK_MAC: 4684 if (add_mac(cmd, av, cblen)) 4685 av += 2; 4686 break; 4687 4688 case TOK_MACTYPE: 4689 NEED1("missing mac type"); 4690 if (!add_mactype(cmd, *av, cblen)) 4691 errx(EX_DATAERR, "invalid mac type %s", *av); 4692 av++; 4693 break; 4694 4695 case TOK_VERREVPATH: 4696 fill_cmd(cmd, O_VERREVPATH, 0, 0); 4697 break; 4698 4699 case TOK_VERSRCREACH: 4700 fill_cmd(cmd, O_VERSRCREACH, 0, 0); 4701 break; 4702 4703 case TOK_ANTISPOOF: 4704 fill_cmd(cmd, O_ANTISPOOF, 0, 0); 4705 break; 4706 4707 case TOK_IPSEC: 4708 fill_cmd(cmd, O_IPSEC, 0, 0); 4709 break; 4710 4711 case TOK_IPV6: 4712 fill_cmd(cmd, O_IP6, 0, 0); 4713 break; 4714 4715 case TOK_IPV4: 4716 fill_cmd(cmd, O_IP4, 0, 0); 4717 break; 4718 4719 case TOK_EXT6HDR: 4720 fill_ext6hdr( cmd, *av ); 4721 av++; 4722 break; 4723 4724 case TOK_FLOWID: 4725 if (proto != IPPROTO_IPV6 ) 4726 errx( EX_USAGE, "flow-id filter is active " 4727 "only for ipv6 protocol\n"); 4728 fill_flow6( (ipfw_insn_u32 *) cmd, *av, cblen); 4729 av++; 4730 break; 4731 4732 case TOK_COMMENT: 4733 fill_comment(cmd, av, cblen); 4734 av[0]=NULL; 4735 break; 4736 4737 case TOK_TAGGED: 4738 if (av[0] && strpbrk(*av, "-,")) { 4739 if (!add_ports(cmd, *av, 0, O_TAGGED, cblen)) 4740 errx(EX_DATAERR, "tagged: invalid tag" 4741 " list: %s", *av); 4742 } 4743 else { 4744 uint16_t tag; 4745 4746 GET_UINT_ARG(tag, IPFW_ARG_MIN, IPFW_ARG_MAX, 4747 TOK_TAGGED, rule_options); 4748 fill_cmd(cmd, O_TAGGED, 0, tag); 4749 } 4750 av++; 4751 break; 4752 4753 case TOK_FIB: 4754 NEED1("fib requires fib number"); 4755 fill_cmd(cmd, O_FIB, 0, strtoul(*av, NULL, 0)); 4756 av++; 4757 break; 4758 case TOK_SOCKARG: 4759 fill_cmd(cmd, O_SOCKARG, 0, 0); 4760 break; 4761 4762 case TOK_LOOKUP: { 4763 ipfw_insn_u32 *c = (ipfw_insn_u32 *)cmd; 4764 int j; 4765 4766 if (!av[0] || !av[1]) 4767 errx(EX_USAGE, "format: lookup argument tablenum"); 4768 cmd->opcode = O_IP_DST_LOOKUP; 4769 cmd->len |= F_INSN_SIZE(ipfw_insn) + 2; 4770 i = match_token(rule_options, *av); 4771 for (j = 0; lookup_key[j] >= 0 ; j++) { 4772 if (i == lookup_key[j]) 4773 break; 4774 } 4775 if (lookup_key[j] <= 0) 4776 errx(EX_USAGE, "format: cannot lookup on %s", *av); 4777 __PAST_END(c->d, 1) = j; // i converted to option 4778 av++; 4779 4780 if ((j = pack_table(tstate, *av)) == 0) 4781 errx(EX_DATAERR, "Invalid table name: %s", *av); 4782 4783 cmd->arg1 = j; 4784 av++; 4785 } 4786 break; 4787 case TOK_FLOW: 4788 NEED1("missing table name"); 4789 if (strncmp(*av, "table(", 6) != 0) 4790 errx(EX_DATAERR, 4791 "enclose table name into \"table()\""); 4792 fill_table(cmd, *av, O_IP_FLOW_LOOKUP, tstate); 4793 av++; 4794 break; 4795 4796 default: 4797 errx(EX_USAGE, "unrecognised option [%d] %s\n", i, s); 4798 } 4799 if (F_LEN(cmd) > 0) { /* prepare to advance */ 4800 prev = cmd; 4801 cmd = next_cmd(cmd, &cblen); 4802 } 4803 } 4804 4805 done: 4806 /* 4807 * Now copy stuff into the rule. 4808 * If we have a keep-state option, the first instruction 4809 * must be a PROBE_STATE (which is generated here). 4810 * If we have a LOG option, it was stored as the first command, 4811 * and now must be moved to the top of the action part. 4812 */ 4813 dst = (ipfw_insn *)rule->cmd; 4814 4815 /* 4816 * First thing to write into the command stream is the match probability. 4817 */ 4818 if (match_prob != 1) { /* 1 means always match */ 4819 dst->opcode = O_PROB; 4820 dst->len = 2; 4821 *((int32_t *)(dst+1)) = (int32_t)(match_prob * 0x7fffffff); 4822 dst += dst->len; 4823 } 4824 4825 /* 4826 * generate O_PROBE_STATE if necessary 4827 */ 4828 if (have_state && have_state->opcode != O_CHECK_STATE) { 4829 fill_cmd(dst, O_PROBE_STATE, 0, have_state->arg1); 4830 dst = next_cmd(dst, &rblen); 4831 } 4832 4833 /* copy all commands but O_LOG, O_KEEP_STATE, O_LIMIT, O_ALTQ, O_TAG */ 4834 for (src = (ipfw_insn *)cmdbuf; src != cmd; src += i) { 4835 i = F_LEN(src); 4836 CHECK_RBUFLEN(i); 4837 4838 switch (src->opcode) { 4839 case O_LOG: 4840 case O_KEEP_STATE: 4841 case O_LIMIT: 4842 case O_ALTQ: 4843 case O_TAG: 4844 break; 4845 default: 4846 bcopy(src, dst, i * sizeof(uint32_t)); 4847 dst += i; 4848 } 4849 } 4850 4851 /* 4852 * put back the have_state command as last opcode 4853 */ 4854 if (have_state && have_state->opcode != O_CHECK_STATE) { 4855 i = F_LEN(have_state); 4856 CHECK_RBUFLEN(i); 4857 bcopy(have_state, dst, i * sizeof(uint32_t)); 4858 dst += i; 4859 } 4860 /* 4861 * start action section 4862 */ 4863 rule->act_ofs = dst - rule->cmd; 4864 4865 /* put back O_LOG, O_ALTQ, O_TAG if necessary */ 4866 if (have_log) { 4867 i = F_LEN(have_log); 4868 CHECK_RBUFLEN(i); 4869 bcopy(have_log, dst, i * sizeof(uint32_t)); 4870 dst += i; 4871 } 4872 if (have_altq) { 4873 i = F_LEN(have_altq); 4874 CHECK_RBUFLEN(i); 4875 bcopy(have_altq, dst, i * sizeof(uint32_t)); 4876 dst += i; 4877 } 4878 if (have_tag) { 4879 i = F_LEN(have_tag); 4880 CHECK_RBUFLEN(i); 4881 bcopy(have_tag, dst, i * sizeof(uint32_t)); 4882 dst += i; 4883 } 4884 4885 /* 4886 * copy all other actions 4887 */ 4888 for (src = (ipfw_insn *)actbuf; src != action; src += i) { 4889 i = F_LEN(src); 4890 CHECK_RBUFLEN(i); 4891 bcopy(src, dst, i * sizeof(uint32_t)); 4892 dst += i; 4893 } 4894 4895 rule->cmd_len = (uint32_t *)dst - (uint32_t *)(rule->cmd); 4896 *rbufsize = (char *)dst - (char *)rule; 4897 } 4898 4899 static int 4900 compare_ntlv(const void *_a, const void *_b) 4901 { 4902 ipfw_obj_ntlv *a, *b; 4903 4904 a = (ipfw_obj_ntlv *)_a; 4905 b = (ipfw_obj_ntlv *)_b; 4906 4907 if (a->set < b->set) 4908 return (-1); 4909 else if (a->set > b->set) 4910 return (1); 4911 4912 if (a->idx < b->idx) 4913 return (-1); 4914 else if (a->idx > b->idx) 4915 return (1); 4916 4917 if (a->head.type < b->head.type) 4918 return (-1); 4919 else if (a->head.type > b->head.type) 4920 return (1); 4921 4922 return (0); 4923 } 4924 4925 /* 4926 * Provide kernel with sorted list of referenced objects 4927 */ 4928 static void 4929 object_sort_ctlv(ipfw_obj_ctlv *ctlv) 4930 { 4931 4932 qsort(ctlv + 1, ctlv->count, ctlv->objsize, compare_ntlv); 4933 } 4934 4935 struct object_kt { 4936 uint16_t uidx; 4937 uint16_t type; 4938 }; 4939 static int 4940 compare_object_kntlv(const void *k, const void *v) 4941 { 4942 ipfw_obj_ntlv *ntlv; 4943 struct object_kt key; 4944 4945 key = *((struct object_kt *)k); 4946 ntlv = (ipfw_obj_ntlv *)v; 4947 4948 if (key.uidx < ntlv->idx) 4949 return (-1); 4950 else if (key.uidx > ntlv->idx) 4951 return (1); 4952 4953 if (key.type < ntlv->head.type) 4954 return (-1); 4955 else if (key.type > ntlv->head.type) 4956 return (1); 4957 4958 return (0); 4959 } 4960 4961 /* 4962 * Finds object name in @ctlv by @idx and @type. 4963 * Uses the following facts: 4964 * 1) All TLVs are the same size 4965 * 2) Kernel implementation provides already sorted list. 4966 * 4967 * Returns table name or NULL. 4968 */ 4969 static char * 4970 object_search_ctlv(ipfw_obj_ctlv *ctlv, uint16_t idx, uint16_t type) 4971 { 4972 ipfw_obj_ntlv *ntlv; 4973 struct object_kt key; 4974 4975 key.uidx = idx; 4976 key.type = type; 4977 4978 ntlv = bsearch(&key, (ctlv + 1), ctlv->count, ctlv->objsize, 4979 compare_object_kntlv); 4980 4981 if (ntlv != NULL) 4982 return (ntlv->name); 4983 4984 return (NULL); 4985 } 4986 4987 static char * 4988 table_search_ctlv(ipfw_obj_ctlv *ctlv, uint16_t idx) 4989 { 4990 4991 return (object_search_ctlv(ctlv, idx, IPFW_TLV_TBL_NAME)); 4992 } 4993 4994 /* 4995 * Adds one or more rules to ipfw chain. 4996 * Data layout: 4997 * Request: 4998 * [ 4999 * ip_fw3_opheader 5000 * [ ipfw_obj_ctlv(IPFW_TLV_TBL_LIST) ipfw_obj_ntlv x N ] (optional *1) 5001 * [ ipfw_obj_ctlv(IPFW_TLV_RULE_LIST) [ ip_fw_rule ip_fw_insn ] x N ] (*2) (*3) 5002 * ] 5003 * Reply: 5004 * [ 5005 * ip_fw3_opheader 5006 * [ ipfw_obj_ctlv(IPFW_TLV_TBL_LIST) ipfw_obj_ntlv x N ] (optional) 5007 * [ ipfw_obj_ctlv(IPFW_TLV_RULE_LIST) [ ip_fw_rule ip_fw_insn ] x N ] 5008 * ] 5009 * 5010 * Rules in reply are modified to store their actual ruleset number. 5011 * 5012 * (*1) TLVs inside IPFW_TLV_TBL_LIST needs to be sorted ascending 5013 * according to their idx field and there has to be no duplicates. 5014 * (*2) Numbered rules inside IPFW_TLV_RULE_LIST needs to be sorted ascending. 5015 * (*3) Each ip_fw structure needs to be aligned to u64 boundary. 5016 */ 5017 void 5018 ipfw_add(char *av[]) 5019 { 5020 uint32_t rulebuf[1024]; 5021 int rbufsize, default_off, tlen, rlen; 5022 size_t sz; 5023 struct tidx ts; 5024 struct ip_fw_rule *rule; 5025 caddr_t tbuf; 5026 ip_fw3_opheader *op3; 5027 ipfw_obj_ctlv *ctlv, *tstate; 5028 5029 rbufsize = sizeof(rulebuf); 5030 memset(rulebuf, 0, rbufsize); 5031 memset(&ts, 0, sizeof(ts)); 5032 5033 /* Optimize case with no tables */ 5034 default_off = sizeof(ipfw_obj_ctlv) + sizeof(ip_fw3_opheader); 5035 op3 = (ip_fw3_opheader *)rulebuf; 5036 ctlv = (ipfw_obj_ctlv *)(op3 + 1); 5037 rule = (struct ip_fw_rule *)(ctlv + 1); 5038 rbufsize -= default_off; 5039 5040 compile_rule(av, (uint32_t *)rule, &rbufsize, &ts); 5041 /* Align rule size to u64 boundary */ 5042 rlen = roundup2(rbufsize, sizeof(uint64_t)); 5043 5044 tbuf = NULL; 5045 sz = 0; 5046 tstate = NULL; 5047 if (ts.count != 0) { 5048 /* Some tables. We have to alloc more data */ 5049 tlen = ts.count * sizeof(ipfw_obj_ntlv); 5050 sz = default_off + sizeof(ipfw_obj_ctlv) + tlen + rlen; 5051 5052 if ((tbuf = calloc(1, sz)) == NULL) 5053 err(EX_UNAVAILABLE, "malloc() failed for IP_FW_ADD"); 5054 op3 = (ip_fw3_opheader *)tbuf; 5055 /* Tables first */ 5056 ctlv = (ipfw_obj_ctlv *)(op3 + 1); 5057 ctlv->head.type = IPFW_TLV_TBLNAME_LIST; 5058 ctlv->head.length = sizeof(ipfw_obj_ctlv) + tlen; 5059 ctlv->count = ts.count; 5060 ctlv->objsize = sizeof(ipfw_obj_ntlv); 5061 memcpy(ctlv + 1, ts.idx, tlen); 5062 object_sort_ctlv(ctlv); 5063 tstate = ctlv; 5064 /* Rule next */ 5065 ctlv = (ipfw_obj_ctlv *)((caddr_t)ctlv + ctlv->head.length); 5066 ctlv->head.type = IPFW_TLV_RULE_LIST; 5067 ctlv->head.length = sizeof(ipfw_obj_ctlv) + rlen; 5068 ctlv->count = 1; 5069 memcpy(ctlv + 1, rule, rbufsize); 5070 } else { 5071 /* Simply add header */ 5072 sz = rlen + default_off; 5073 memset(ctlv, 0, sizeof(*ctlv)); 5074 ctlv->head.type = IPFW_TLV_RULE_LIST; 5075 ctlv->head.length = sizeof(ipfw_obj_ctlv) + rlen; 5076 ctlv->count = 1; 5077 } 5078 5079 if (do_get3(IP_FW_XADD, op3, &sz) != 0) 5080 err(EX_UNAVAILABLE, "getsockopt(%s)", "IP_FW_XADD"); 5081 5082 if (!co.do_quiet) { 5083 struct format_opts sfo; 5084 struct buf_pr bp; 5085 memset(&sfo, 0, sizeof(sfo)); 5086 sfo.tstate = tstate; 5087 sfo.set_mask = (uint32_t)(-1); 5088 bp_alloc(&bp, 4096); 5089 show_static_rule(&co, &sfo, &bp, rule, NULL); 5090 printf("%s", bp.buf); 5091 bp_free(&bp); 5092 } 5093 5094 if (tbuf != NULL) 5095 free(tbuf); 5096 5097 if (ts.idx != NULL) 5098 free(ts.idx); 5099 } 5100 5101 /* 5102 * clear the counters or the log counters. 5103 * optname has the following values: 5104 * 0 (zero both counters and logging) 5105 * 1 (zero logging only) 5106 */ 5107 void 5108 ipfw_zero(int ac, char *av[], int optname) 5109 { 5110 ipfw_range_tlv rt; 5111 uint32_t arg; 5112 int failed = EX_OK; 5113 char const *errstr; 5114 char const *name = optname ? "RESETLOG" : "ZERO"; 5115 5116 optname = optname ? IP_FW_XRESETLOG : IP_FW_XZERO; 5117 memset(&rt, 0, sizeof(rt)); 5118 5119 av++; ac--; 5120 5121 if (ac == 0) { 5122 /* clear all entries */ 5123 rt.flags = IPFW_RCFLAG_ALL; 5124 if (do_range_cmd(optname, &rt) < 0) 5125 err(EX_UNAVAILABLE, "setsockopt(IP_FW_X%s)", name); 5126 if (!co.do_quiet) 5127 printf("%s.\n", optname == IP_FW_XZERO ? 5128 "Accounting cleared":"Logging counts reset"); 5129 5130 return; 5131 } 5132 5133 while (ac) { 5134 /* Rule number */ 5135 if (isdigit(**av)) { 5136 arg = strtonum(*av, 0, 0xffff, &errstr); 5137 if (errstr) 5138 errx(EX_DATAERR, 5139 "invalid rule number %s\n", *av); 5140 rt.start_rule = arg; 5141 rt.end_rule = arg; 5142 rt.flags |= IPFW_RCFLAG_RANGE; 5143 if (co.use_set != 0) { 5144 rt.set = co.use_set - 1; 5145 rt.flags |= IPFW_RCFLAG_SET; 5146 } 5147 if (do_range_cmd(optname, &rt) != 0) { 5148 warn("rule %u: setsockopt(IP_FW_X%s)", 5149 arg, name); 5150 failed = EX_UNAVAILABLE; 5151 } else if (rt.new_set == 0) { 5152 printf("Entry %d not found\n", arg); 5153 failed = EX_UNAVAILABLE; 5154 } else if (!co.do_quiet) 5155 printf("Entry %d %s.\n", arg, 5156 optname == IP_FW_XZERO ? 5157 "cleared" : "logging count reset"); 5158 } else { 5159 errx(EX_USAGE, "invalid rule number ``%s''", *av); 5160 } 5161 av++; ac--; 5162 } 5163 if (failed != EX_OK) 5164 exit(failed); 5165 } 5166 5167 void 5168 ipfw_flush(int force) 5169 { 5170 ipfw_range_tlv rt; 5171 5172 if (!force && !co.do_quiet) { /* need to ask user */ 5173 int c; 5174 5175 printf("Are you sure? [yn] "); 5176 fflush(stdout); 5177 do { 5178 c = toupper(getc(stdin)); 5179 while (c != '\n' && getc(stdin) != '\n') 5180 if (feof(stdin)) 5181 return; /* and do not flush */ 5182 } while (c != 'Y' && c != 'N'); 5183 printf("\n"); 5184 if (c == 'N') /* user said no */ 5185 return; 5186 } 5187 if (co.do_pipe) { 5188 dummynet_flush(); 5189 return; 5190 } 5191 /* `ipfw set N flush` - is the same that `ipfw delete set N` */ 5192 memset(&rt, 0, sizeof(rt)); 5193 if (co.use_set != 0) { 5194 rt.set = co.use_set - 1; 5195 rt.flags = IPFW_RCFLAG_SET; 5196 } else 5197 rt.flags = IPFW_RCFLAG_ALL; 5198 if (do_range_cmd(IP_FW_XDEL, &rt) != 0) 5199 err(EX_UNAVAILABLE, "setsockopt(IP_FW_XDEL)"); 5200 if (!co.do_quiet) 5201 printf("Flushed all %s.\n", co.do_pipe ? "pipes" : "rules"); 5202 } 5203 5204 static struct _s_x intcmds[] = { 5205 { "talist", TOK_TALIST }, 5206 { "iflist", TOK_IFLIST }, 5207 { "olist", TOK_OLIST }, 5208 { "vlist", TOK_VLIST }, 5209 { NULL, 0 } 5210 }; 5211 5212 static struct _s_x otypes[] = { 5213 { "EACTION", IPFW_TLV_EACTION }, 5214 { "DYNSTATE", IPFW_TLV_STATE_NAME }, 5215 { NULL, 0 } 5216 }; 5217 5218 static const char* 5219 lookup_eaction_name(ipfw_obj_ntlv *ntlv, int cnt, uint16_t type) 5220 { 5221 const char *name; 5222 int i; 5223 5224 name = NULL; 5225 for (i = 0; i < cnt; i++) { 5226 if (ntlv[i].head.type != IPFW_TLV_EACTION) 5227 continue; 5228 if (IPFW_TLV_EACTION_NAME(ntlv[i].idx) != type) 5229 continue; 5230 name = ntlv[i].name; 5231 break; 5232 } 5233 return (name); 5234 } 5235 5236 static void 5237 ipfw_list_objects(int ac, char *av[]) 5238 { 5239 ipfw_obj_lheader req, *olh; 5240 ipfw_obj_ntlv *ntlv; 5241 const char *name; 5242 size_t sz; 5243 int i; 5244 5245 memset(&req, 0, sizeof(req)); 5246 sz = sizeof(req); 5247 if (do_get3(IP_FW_DUMP_SRVOBJECTS, &req.opheader, &sz) != 0) 5248 if (errno != ENOMEM) 5249 return; 5250 5251 sz = req.size; 5252 if ((olh = calloc(1, sz)) == NULL) 5253 return; 5254 5255 olh->size = sz; 5256 if (do_get3(IP_FW_DUMP_SRVOBJECTS, &olh->opheader, &sz) != 0) { 5257 free(olh); 5258 return; 5259 } 5260 5261 if (olh->count > 0) 5262 printf("Objects list:\n"); 5263 else 5264 printf("There are no objects\n"); 5265 ntlv = (ipfw_obj_ntlv *)(olh + 1); 5266 for (i = 0; i < olh->count; i++) { 5267 name = match_value(otypes, ntlv->head.type); 5268 if (name == NULL) 5269 name = lookup_eaction_name( 5270 (ipfw_obj_ntlv *)(olh + 1), olh->count, 5271 ntlv->head.type); 5272 if (name == NULL) 5273 printf(" kidx: %4d\ttype: %10d\tname: %s\n", 5274 ntlv->idx, ntlv->head.type, ntlv->name); 5275 else 5276 printf(" kidx: %4d\ttype: %10s\tname: %s\n", 5277 ntlv->idx, name, ntlv->name); 5278 ntlv++; 5279 } 5280 free(olh); 5281 } 5282 5283 void 5284 ipfw_internal_handler(int ac, char *av[]) 5285 { 5286 int tcmd; 5287 5288 ac--; av++; 5289 NEED1("internal cmd required"); 5290 5291 if ((tcmd = match_token(intcmds, *av)) == -1) 5292 errx(EX_USAGE, "invalid internal sub-cmd: %s", *av); 5293 5294 switch (tcmd) { 5295 case TOK_IFLIST: 5296 ipfw_list_tifaces(); 5297 break; 5298 case TOK_TALIST: 5299 ipfw_list_ta(ac, av); 5300 break; 5301 case TOK_OLIST: 5302 ipfw_list_objects(ac, av); 5303 break; 5304 case TOK_VLIST: 5305 ipfw_list_values(ac, av); 5306 break; 5307 } 5308 } 5309 5310 static int 5311 ipfw_get_tracked_ifaces(ipfw_obj_lheader **polh) 5312 { 5313 ipfw_obj_lheader req, *olh; 5314 size_t sz; 5315 5316 memset(&req, 0, sizeof(req)); 5317 sz = sizeof(req); 5318 5319 if (do_get3(IP_FW_XIFLIST, &req.opheader, &sz) != 0) { 5320 if (errno != ENOMEM) 5321 return (errno); 5322 } 5323 5324 sz = req.size; 5325 if ((olh = calloc(1, sz)) == NULL) 5326 return (ENOMEM); 5327 5328 olh->size = sz; 5329 if (do_get3(IP_FW_XIFLIST, &olh->opheader, &sz) != 0) { 5330 free(olh); 5331 return (errno); 5332 } 5333 5334 *polh = olh; 5335 return (0); 5336 } 5337 5338 static int 5339 ifinfo_cmp(const void *a, const void *b) 5340 { 5341 ipfw_iface_info *ia, *ib; 5342 5343 ia = (ipfw_iface_info *)a; 5344 ib = (ipfw_iface_info *)b; 5345 5346 return (stringnum_cmp(ia->ifname, ib->ifname)); 5347 } 5348 5349 /* 5350 * Retrieves table list from kernel, 5351 * optionally sorts it and calls requested function for each table. 5352 * Returns 0 on success. 5353 */ 5354 static void 5355 ipfw_list_tifaces() 5356 { 5357 ipfw_obj_lheader *olh; 5358 ipfw_iface_info *info; 5359 int i, error; 5360 5361 if ((error = ipfw_get_tracked_ifaces(&olh)) != 0) 5362 err(EX_OSERR, "Unable to request ipfw tracked interface list"); 5363 5364 5365 qsort(olh + 1, olh->count, olh->objsize, ifinfo_cmp); 5366 5367 info = (ipfw_iface_info *)(olh + 1); 5368 for (i = 0; i < olh->count; i++) { 5369 if (info->flags & IPFW_IFFLAG_RESOLVED) 5370 printf("%s ifindex: %d refcount: %u changes: %u\n", 5371 info->ifname, info->ifindex, info->refcnt, 5372 info->gencnt); 5373 else 5374 printf("%s ifindex: unresolved refcount: %u changes: %u\n", 5375 info->ifname, info->refcnt, info->gencnt); 5376 info = (ipfw_iface_info *)((caddr_t)info + olh->objsize); 5377 } 5378 5379 free(olh); 5380 } 5381 5382 5383 5384 5385