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 { "nat64lsn", TOK_NAT64LSN }, 239 { "nat64stl", TOK_NAT64STL }, 240 { "nptv6", TOK_NPTV6 }, 241 { NULL, 0 } /* terminator */ 242 }; 243 244 static struct _s_x rule_actions[] = { 245 { "accept", TOK_ACCEPT }, 246 { "pass", TOK_ACCEPT }, 247 { "allow", TOK_ACCEPT }, 248 { "permit", TOK_ACCEPT }, 249 { "count", TOK_COUNT }, 250 { "pipe", TOK_PIPE }, 251 { "queue", TOK_QUEUE }, 252 { "divert", TOK_DIVERT }, 253 { "tee", TOK_TEE }, 254 { "netgraph", TOK_NETGRAPH }, 255 { "ngtee", TOK_NGTEE }, 256 { "fwd", TOK_FORWARD }, 257 { "forward", TOK_FORWARD }, 258 { "skipto", TOK_SKIPTO }, 259 { "deny", TOK_DENY }, 260 { "drop", TOK_DENY }, 261 { "reject", TOK_REJECT }, 262 { "reset6", TOK_RESET6 }, 263 { "reset", TOK_RESET }, 264 { "unreach6", TOK_UNREACH6 }, 265 { "unreach", TOK_UNREACH }, 266 { "check-state", TOK_CHECKSTATE }, 267 { "//", TOK_COMMENT }, 268 { "nat", TOK_NAT }, 269 { "reass", TOK_REASS }, 270 { "setfib", TOK_SETFIB }, 271 { "setdscp", TOK_SETDSCP }, 272 { "call", TOK_CALL }, 273 { "return", TOK_RETURN }, 274 { "eaction", TOK_EACTION }, 275 { NULL, 0 } /* terminator */ 276 }; 277 278 static struct _s_x rule_action_params[] = { 279 { "altq", TOK_ALTQ }, 280 { "log", TOK_LOG }, 281 { "tag", TOK_TAG }, 282 { "untag", TOK_UNTAG }, 283 { NULL, 0 } /* terminator */ 284 }; 285 286 /* 287 * The 'lookup' instruction accepts one of the following arguments. 288 * -1 is a terminator for the list. 289 * Arguments are passed as v[1] in O_DST_LOOKUP options. 290 */ 291 static int lookup_key[] = { 292 TOK_DSTIP, TOK_SRCIP, TOK_DSTPORT, TOK_SRCPORT, 293 TOK_UID, TOK_JAIL, TOK_DSCP, -1 }; 294 295 static struct _s_x rule_options[] = { 296 { "tagged", TOK_TAGGED }, 297 { "uid", TOK_UID }, 298 { "gid", TOK_GID }, 299 { "jail", TOK_JAIL }, 300 { "in", TOK_IN }, 301 { "limit", TOK_LIMIT }, 302 { "keep-state", TOK_KEEPSTATE }, 303 { "bridged", TOK_LAYER2 }, 304 { "layer2", TOK_LAYER2 }, 305 { "out", TOK_OUT }, 306 { "diverted", TOK_DIVERTED }, 307 { "diverted-loopback", TOK_DIVERTEDLOOPBACK }, 308 { "diverted-output", TOK_DIVERTEDOUTPUT }, 309 { "xmit", TOK_XMIT }, 310 { "recv", TOK_RECV }, 311 { "via", TOK_VIA }, 312 { "fragment", TOK_FRAG }, 313 { "frag", TOK_FRAG }, 314 { "fib", TOK_FIB }, 315 { "ipoptions", TOK_IPOPTS }, 316 { "ipopts", TOK_IPOPTS }, 317 { "iplen", TOK_IPLEN }, 318 { "ipid", TOK_IPID }, 319 { "ipprecedence", TOK_IPPRECEDENCE }, 320 { "dscp", TOK_DSCP }, 321 { "iptos", TOK_IPTOS }, 322 { "ipttl", TOK_IPTTL }, 323 { "ipversion", TOK_IPVER }, 324 { "ipver", TOK_IPVER }, 325 { "estab", TOK_ESTAB }, 326 { "established", TOK_ESTAB }, 327 { "setup", TOK_SETUP }, 328 { "sockarg", TOK_SOCKARG }, 329 { "tcpdatalen", TOK_TCPDATALEN }, 330 { "tcpflags", TOK_TCPFLAGS }, 331 { "tcpflgs", TOK_TCPFLAGS }, 332 { "tcpoptions", TOK_TCPOPTS }, 333 { "tcpopts", TOK_TCPOPTS }, 334 { "tcpseq", TOK_TCPSEQ }, 335 { "tcpack", TOK_TCPACK }, 336 { "tcpwin", TOK_TCPWIN }, 337 { "icmptype", TOK_ICMPTYPES }, 338 { "icmptypes", TOK_ICMPTYPES }, 339 { "dst-ip", TOK_DSTIP }, 340 { "src-ip", TOK_SRCIP }, 341 { "dst-port", TOK_DSTPORT }, 342 { "src-port", TOK_SRCPORT }, 343 { "proto", TOK_PROTO }, 344 { "MAC", TOK_MAC }, 345 { "mac", TOK_MAC }, 346 { "mac-type", TOK_MACTYPE }, 347 { "verrevpath", TOK_VERREVPATH }, 348 { "versrcreach", TOK_VERSRCREACH }, 349 { "antispoof", TOK_ANTISPOOF }, 350 { "ipsec", TOK_IPSEC }, 351 { "icmp6type", TOK_ICMP6TYPES }, 352 { "icmp6types", TOK_ICMP6TYPES }, 353 { "ext6hdr", TOK_EXT6HDR}, 354 { "flow-id", TOK_FLOWID}, 355 { "ipv6", TOK_IPV6}, 356 { "ip6", TOK_IPV6}, 357 { "ipv4", TOK_IPV4}, 358 { "ip4", TOK_IPV4}, 359 { "dst-ipv6", TOK_DSTIP6}, 360 { "dst-ip6", TOK_DSTIP6}, 361 { "src-ipv6", TOK_SRCIP6}, 362 { "src-ip6", TOK_SRCIP6}, 363 { "lookup", TOK_LOOKUP}, 364 { "flow", TOK_FLOW}, 365 { "//", TOK_COMMENT }, 366 367 { "not", TOK_NOT }, /* pseudo option */ 368 { "!", /* escape ? */ TOK_NOT }, /* pseudo option */ 369 { "or", TOK_OR }, /* pseudo option */ 370 { "|", /* escape */ TOK_OR }, /* pseudo option */ 371 { "{", TOK_STARTBRACE }, /* pseudo option */ 372 { "(", TOK_STARTBRACE }, /* pseudo option */ 373 { "}", TOK_ENDBRACE }, /* pseudo option */ 374 { ")", TOK_ENDBRACE }, /* pseudo option */ 375 { NULL, 0 } /* terminator */ 376 }; 377 378 void bprint_uint_arg(struct buf_pr *bp, const char *str, uint32_t arg); 379 static int ipfw_get_config(struct cmdline_opts *co, struct format_opts *fo, 380 ipfw_cfg_lheader **pcfg, size_t *psize); 381 static int ipfw_show_config(struct cmdline_opts *co, struct format_opts *fo, 382 ipfw_cfg_lheader *cfg, size_t sz, int ac, char **av); 383 static void ipfw_list_tifaces(void); 384 385 struct tidx; 386 static uint16_t pack_object(struct tidx *tstate, char *name, int otype); 387 static uint16_t pack_table(struct tidx *tstate, char *name); 388 389 static char *table_search_ctlv(ipfw_obj_ctlv *ctlv, uint16_t idx); 390 static void object_sort_ctlv(ipfw_obj_ctlv *ctlv); 391 static char *object_search_ctlv(ipfw_obj_ctlv *ctlv, uint16_t idx, 392 uint16_t type); 393 394 /* 395 * Simple string buffer API. 396 * Used to simplify buffer passing between function and for 397 * transparent overrun handling. 398 */ 399 400 /* 401 * Allocates new buffer of given size @sz. 402 * 403 * Returns 0 on success. 404 */ 405 int 406 bp_alloc(struct buf_pr *b, size_t size) 407 { 408 memset(b, 0, sizeof(struct buf_pr)); 409 410 if ((b->buf = calloc(1, size)) == NULL) 411 return (ENOMEM); 412 413 b->ptr = b->buf; 414 b->size = size; 415 b->avail = b->size; 416 417 return (0); 418 } 419 420 void 421 bp_free(struct buf_pr *b) 422 { 423 424 free(b->buf); 425 } 426 427 /* 428 * Flushes buffer so new writer start from beginning. 429 */ 430 void 431 bp_flush(struct buf_pr *b) 432 { 433 434 b->ptr = b->buf; 435 b->avail = b->size; 436 b->buf[0] = '\0'; 437 } 438 439 /* 440 * Print message specified by @format and args. 441 * Automatically manage buffer space and transparently handle 442 * buffer overruns. 443 * 444 * Returns number of bytes that should have been printed. 445 */ 446 int 447 bprintf(struct buf_pr *b, char *format, ...) 448 { 449 va_list args; 450 int i; 451 452 va_start(args, format); 453 454 i = vsnprintf(b->ptr, b->avail, format, args); 455 va_end(args); 456 457 if (i > b->avail || i < 0) { 458 /* Overflow or print error */ 459 b->avail = 0; 460 } else { 461 b->ptr += i; 462 b->avail -= i; 463 } 464 465 b->needed += i; 466 467 return (i); 468 } 469 470 /* 471 * Special values printer for tablearg-aware opcodes. 472 */ 473 void 474 bprint_uint_arg(struct buf_pr *bp, const char *str, uint32_t arg) 475 { 476 477 if (str != NULL) 478 bprintf(bp, "%s", str); 479 if (arg == IP_FW_TARG) 480 bprintf(bp, "tablearg"); 481 else 482 bprintf(bp, "%u", arg); 483 } 484 485 /* 486 * Helper routine to print a possibly unaligned uint64_t on 487 * various platform. If width > 0, print the value with 488 * the desired width, followed by a space; 489 * otherwise, return the required width. 490 */ 491 int 492 pr_u64(struct buf_pr *b, uint64_t *pd, int width) 493 { 494 #ifdef TCC 495 #define U64_FMT "I64" 496 #else 497 #define U64_FMT "llu" 498 #endif 499 uint64_t u; 500 unsigned long long d; 501 502 bcopy (pd, &u, sizeof(u)); 503 d = u; 504 return (width > 0) ? 505 bprintf(b, "%*" U64_FMT " ", width, d) : 506 snprintf(NULL, 0, "%" U64_FMT, d) ; 507 #undef U64_FMT 508 } 509 510 511 void * 512 safe_calloc(size_t number, size_t size) 513 { 514 void *ret = calloc(number, size); 515 516 if (ret == NULL) 517 err(EX_OSERR, "calloc"); 518 return ret; 519 } 520 521 void * 522 safe_realloc(void *ptr, size_t size) 523 { 524 void *ret = realloc(ptr, size); 525 526 if (ret == NULL) 527 err(EX_OSERR, "realloc"); 528 return ret; 529 } 530 531 /* 532 * Compare things like interface or table names. 533 */ 534 int 535 stringnum_cmp(const char *a, const char *b) 536 { 537 int la, lb; 538 539 la = strlen(a); 540 lb = strlen(b); 541 542 if (la > lb) 543 return (1); 544 else if (la < lb) 545 return (-01); 546 547 return (strcmp(a, b)); 548 } 549 550 551 /* 552 * conditionally runs the command. 553 * Selected options or negative -> getsockopt 554 */ 555 int 556 do_cmd(int optname, void *optval, uintptr_t optlen) 557 { 558 int i; 559 560 if (co.test_only) 561 return 0; 562 563 if (ipfw_socket == -1) 564 ipfw_socket = socket(AF_INET, SOCK_RAW, IPPROTO_RAW); 565 if (ipfw_socket < 0) 566 err(EX_UNAVAILABLE, "socket"); 567 568 if (optname == IP_FW_GET || optname == IP_DUMMYNET_GET || 569 optname == IP_FW_ADD || optname == IP_FW3 || 570 optname == IP_FW_NAT_GET_CONFIG || 571 optname < 0 || 572 optname == IP_FW_NAT_GET_LOG) { 573 if (optname < 0) 574 optname = -optname; 575 i = getsockopt(ipfw_socket, IPPROTO_IP, optname, optval, 576 (socklen_t *)optlen); 577 } else { 578 i = setsockopt(ipfw_socket, IPPROTO_IP, optname, optval, optlen); 579 } 580 return i; 581 } 582 583 /* 584 * do_set3 - pass ipfw control cmd to kernel 585 * @optname: option name 586 * @optval: pointer to option data 587 * @optlen: option length 588 * 589 * Assumes op3 header is already embedded. 590 * Calls setsockopt() with IP_FW3 as kernel-visible opcode. 591 * Returns 0 on success or errno otherwise. 592 */ 593 int 594 do_set3(int optname, ip_fw3_opheader *op3, size_t optlen) 595 { 596 597 if (co.test_only) 598 return (0); 599 600 if (ipfw_socket == -1) 601 ipfw_socket = socket(AF_INET, SOCK_RAW, IPPROTO_RAW); 602 if (ipfw_socket < 0) 603 err(EX_UNAVAILABLE, "socket"); 604 605 op3->opcode = optname; 606 607 return (setsockopt(ipfw_socket, IPPROTO_IP, IP_FW3, op3, optlen)); 608 } 609 610 /* 611 * do_get3 - pass ipfw control cmd to kernel 612 * @optname: option name 613 * @optval: pointer to option data 614 * @optlen: pointer to option length 615 * 616 * Assumes op3 header is already embedded. 617 * Calls getsockopt() with IP_FW3 as kernel-visible opcode. 618 * Returns 0 on success or errno otherwise. 619 */ 620 int 621 do_get3(int optname, ip_fw3_opheader *op3, size_t *optlen) 622 { 623 int error; 624 socklen_t len; 625 626 if (co.test_only) 627 return (0); 628 629 if (ipfw_socket == -1) 630 ipfw_socket = socket(AF_INET, SOCK_RAW, IPPROTO_RAW); 631 if (ipfw_socket < 0) 632 err(EX_UNAVAILABLE, "socket"); 633 634 op3->opcode = optname; 635 636 len = *optlen; 637 error = getsockopt(ipfw_socket, IPPROTO_IP, IP_FW3, op3, &len); 638 *optlen = len; 639 640 return (error); 641 } 642 643 /** 644 * match_token takes a table and a string, returns the value associated 645 * with the string (-1 in case of failure). 646 */ 647 int 648 match_token(struct _s_x *table, const char *string) 649 { 650 struct _s_x *pt; 651 uint i = strlen(string); 652 653 for (pt = table ; i && pt->s != NULL ; pt++) 654 if (strlen(pt->s) == i && !bcmp(string, pt->s, i)) 655 return pt->x; 656 return (-1); 657 } 658 659 /** 660 * match_token_relaxed takes a table and a string, returns the value associated 661 * with the string for the best match. 662 * 663 * Returns: 664 * value from @table for matched records 665 * -1 for non-matched records 666 * -2 if more than one records match @string. 667 */ 668 int 669 match_token_relaxed(struct _s_x *table, const char *string) 670 { 671 struct _s_x *pt, *m; 672 int i, c; 673 674 i = strlen(string); 675 c = 0; 676 677 for (pt = table ; i != 0 && pt->s != NULL ; pt++) { 678 if (strncmp(pt->s, string, i) != 0) 679 continue; 680 m = pt; 681 c++; 682 } 683 684 if (c == 1) 685 return (m->x); 686 687 return (c > 0 ? -2: -1); 688 } 689 690 int 691 get_token(struct _s_x *table, const char *string, const char *errbase) 692 { 693 int tcmd; 694 695 if ((tcmd = match_token_relaxed(table, string)) < 0) 696 errx(EX_USAGE, "%s %s %s", 697 (tcmd == 0) ? "invalid" : "ambiguous", errbase, string); 698 699 return (tcmd); 700 } 701 702 /** 703 * match_value takes a table and a value, returns the string associated 704 * with the value (NULL in case of failure). 705 */ 706 char const * 707 match_value(struct _s_x *p, int value) 708 { 709 for (; p->s != NULL; p++) 710 if (p->x == value) 711 return p->s; 712 return NULL; 713 } 714 715 size_t 716 concat_tokens(char *buf, size_t bufsize, struct _s_x *table, char *delimiter) 717 { 718 struct _s_x *pt; 719 int l; 720 size_t sz; 721 722 for (sz = 0, pt = table ; pt->s != NULL; pt++) { 723 l = snprintf(buf + sz, bufsize - sz, "%s%s", 724 (sz == 0) ? "" : delimiter, pt->s); 725 sz += l; 726 bufsize += l; 727 if (sz > bufsize) 728 return (bufsize); 729 } 730 731 return (sz); 732 } 733 734 /* 735 * helper function to process a set of flags and set bits in the 736 * appropriate masks. 737 */ 738 int 739 fill_flags(struct _s_x *flags, char *p, char **e, uint32_t *set, 740 uint32_t *clear) 741 { 742 char *q; /* points to the separator */ 743 int val; 744 uint32_t *which; /* mask we are working on */ 745 746 while (p && *p) { 747 if (*p == '!') { 748 p++; 749 which = clear; 750 } else 751 which = set; 752 q = strchr(p, ','); 753 if (q) 754 *q++ = '\0'; 755 val = match_token(flags, p); 756 if (val <= 0) { 757 if (e != NULL) 758 *e = p; 759 return (-1); 760 } 761 *which |= (uint32_t)val; 762 p = q; 763 } 764 return (0); 765 } 766 767 void 768 print_flags_buffer(char *buf, size_t sz, struct _s_x *list, uint32_t set) 769 { 770 char const *comma = ""; 771 int i, l; 772 773 for (i = 0; list[i].x != 0; i++) { 774 if ((set & list[i].x) == 0) 775 continue; 776 777 set &= ~list[i].x; 778 l = snprintf(buf, sz, "%s%s", comma, list[i].s); 779 if (l >= sz) 780 return; 781 comma = ","; 782 buf += l; 783 sz -=l; 784 } 785 } 786 787 /* 788 * _substrcmp takes two strings and returns 1 if they do not match, 789 * and 0 if they match exactly or the first string is a sub-string 790 * of the second. A warning is printed to stderr in the case that the 791 * first string is a sub-string of the second. 792 * 793 * This function will be removed in the future through the usual 794 * deprecation process. 795 */ 796 int 797 _substrcmp(const char *str1, const char* str2) 798 { 799 800 if (strncmp(str1, str2, strlen(str1)) != 0) 801 return 1; 802 803 if (strlen(str1) != strlen(str2)) 804 warnx("DEPRECATED: '%s' matched '%s' as a sub-string", 805 str1, str2); 806 return 0; 807 } 808 809 /* 810 * _substrcmp2 takes three strings and returns 1 if the first two do not match, 811 * and 0 if they match exactly or the second string is a sub-string 812 * of the first. A warning is printed to stderr in the case that the 813 * first string does not match the third. 814 * 815 * This function exists to warn about the bizarre construction 816 * strncmp(str, "by", 2) which is used to allow people to use a shortcut 817 * for "bytes". The problem is that in addition to accepting "by", 818 * "byt", "byte", and "bytes", it also excepts "by_rabid_dogs" and any 819 * other string beginning with "by". 820 * 821 * This function will be removed in the future through the usual 822 * deprecation process. 823 */ 824 int 825 _substrcmp2(const char *str1, const char* str2, const char* str3) 826 { 827 828 if (strncmp(str1, str2, strlen(str2)) != 0) 829 return 1; 830 831 if (strcmp(str1, str3) != 0) 832 warnx("DEPRECATED: '%s' matched '%s'", 833 str1, str3); 834 return 0; 835 } 836 837 /* 838 * prints one port, symbolic or numeric 839 */ 840 static void 841 print_port(struct buf_pr *bp, int proto, uint16_t port) 842 { 843 844 if (proto == IPPROTO_ETHERTYPE) { 845 char const *s; 846 847 if (co.do_resolv && (s = match_value(ether_types, port)) ) 848 bprintf(bp, "%s", s); 849 else 850 bprintf(bp, "0x%04x", port); 851 } else { 852 struct servent *se = NULL; 853 if (co.do_resolv) { 854 struct protoent *pe = getprotobynumber(proto); 855 856 se = getservbyport(htons(port), pe ? pe->p_name : NULL); 857 } 858 if (se) 859 bprintf(bp, "%s", se->s_name); 860 else 861 bprintf(bp, "%d", port); 862 } 863 } 864 865 static struct _s_x _port_name[] = { 866 {"dst-port", O_IP_DSTPORT}, 867 {"src-port", O_IP_SRCPORT}, 868 {"ipid", O_IPID}, 869 {"iplen", O_IPLEN}, 870 {"ipttl", O_IPTTL}, 871 {"mac-type", O_MAC_TYPE}, 872 {"tcpdatalen", O_TCPDATALEN}, 873 {"tcpwin", O_TCPWIN}, 874 {"tagged", O_TAGGED}, 875 {NULL, 0} 876 }; 877 878 /* 879 * Print the values in a list 16-bit items of the types above. 880 * XXX todo: add support for mask. 881 */ 882 static void 883 print_newports(struct buf_pr *bp, ipfw_insn_u16 *cmd, int proto, int opcode) 884 { 885 uint16_t *p = cmd->ports; 886 int i; 887 char const *sep; 888 889 if (opcode != 0) { 890 sep = match_value(_port_name, opcode); 891 if (sep == NULL) 892 sep = "???"; 893 bprintf(bp, " %s", sep); 894 } 895 sep = " "; 896 for (i = F_LEN((ipfw_insn *)cmd) - 1; i > 0; i--, p += 2) { 897 bprintf(bp, "%s", sep); 898 print_port(bp, proto, p[0]); 899 if (p[0] != p[1]) { 900 bprintf(bp, "-"); 901 print_port(bp, proto, p[1]); 902 } 903 sep = ","; 904 } 905 } 906 907 /* 908 * Like strtol, but also translates service names into port numbers 909 * for some protocols. 910 * In particular: 911 * proto == -1 disables the protocol check; 912 * proto == IPPROTO_ETHERTYPE looks up an internal table 913 * proto == <some value in /etc/protocols> matches the values there. 914 * Returns *end == s in case the parameter is not found. 915 */ 916 static int 917 strtoport(char *s, char **end, int base, int proto) 918 { 919 char *p, *buf; 920 char *s1; 921 int i; 922 923 *end = s; /* default - not found */ 924 if (*s == '\0') 925 return 0; /* not found */ 926 927 if (isdigit(*s)) 928 return strtol(s, end, base); 929 930 /* 931 * find separator. '\\' escapes the next char. 932 */ 933 for (s1 = s; *s1 && (isalnum(*s1) || *s1 == '\\') ; s1++) 934 if (*s1 == '\\' && s1[1] != '\0') 935 s1++; 936 937 buf = safe_calloc(s1 - s + 1, 1); 938 939 /* 940 * copy into a buffer skipping backslashes 941 */ 942 for (p = s, i = 0; p != s1 ; p++) 943 if (*p != '\\') 944 buf[i++] = *p; 945 buf[i++] = '\0'; 946 947 if (proto == IPPROTO_ETHERTYPE) { 948 i = match_token(ether_types, buf); 949 free(buf); 950 if (i != -1) { /* found */ 951 *end = s1; 952 return i; 953 } 954 } else { 955 struct protoent *pe = NULL; 956 struct servent *se; 957 958 if (proto != 0) 959 pe = getprotobynumber(proto); 960 setservent(1); 961 se = getservbyname(buf, pe ? pe->p_name : NULL); 962 free(buf); 963 if (se != NULL) { 964 *end = s1; 965 return ntohs(se->s_port); 966 } 967 } 968 return 0; /* not found */ 969 } 970 971 /* 972 * Fill the body of the command with the list of port ranges. 973 */ 974 static int 975 fill_newports(ipfw_insn_u16 *cmd, char *av, int proto, int cblen) 976 { 977 uint16_t a, b, *p = cmd->ports; 978 int i = 0; 979 char *s = av; 980 981 while (*s) { 982 a = strtoport(av, &s, 0, proto); 983 if (s == av) /* empty or invalid argument */ 984 return (0); 985 986 CHECK_LENGTH(cblen, i + 2); 987 988 switch (*s) { 989 case '-': /* a range */ 990 av = s + 1; 991 b = strtoport(av, &s, 0, proto); 992 /* Reject expressions like '1-abc' or '1-2-3'. */ 993 if (s == av || (*s != ',' && *s != '\0')) 994 return (0); 995 p[0] = a; 996 p[1] = b; 997 break; 998 case ',': /* comma separated list */ 999 case '\0': 1000 p[0] = p[1] = a; 1001 break; 1002 default: 1003 warnx("port list: invalid separator <%c> in <%s>", 1004 *s, av); 1005 return (0); 1006 } 1007 1008 i++; 1009 p += 2; 1010 av = s + 1; 1011 } 1012 if (i > 0) { 1013 if (i + 1 > F_LEN_MASK) 1014 errx(EX_DATAERR, "too many ports/ranges\n"); 1015 cmd->o.len |= i + 1; /* leave F_NOT and F_OR untouched */ 1016 } 1017 return (i); 1018 } 1019 1020 /* 1021 * Fill the body of the command with the list of DiffServ codepoints. 1022 */ 1023 static void 1024 fill_dscp(ipfw_insn *cmd, char *av, int cblen) 1025 { 1026 uint32_t *low, *high; 1027 char *s = av, *a; 1028 int code; 1029 1030 cmd->opcode = O_DSCP; 1031 cmd->len |= F_INSN_SIZE(ipfw_insn_u32) + 1; 1032 1033 CHECK_CMDLEN; 1034 1035 low = (uint32_t *)(cmd + 1); 1036 high = low + 1; 1037 1038 *low = 0; 1039 *high = 0; 1040 1041 while (s != NULL) { 1042 a = strchr(s, ','); 1043 1044 if (a != NULL) 1045 *a++ = '\0'; 1046 1047 if (isalpha(*s)) { 1048 if ((code = match_token(f_ipdscp, s)) == -1) 1049 errx(EX_DATAERR, "Unknown DSCP code"); 1050 } else { 1051 code = strtoul(s, NULL, 10); 1052 if (code < 0 || code > 63) 1053 errx(EX_DATAERR, "Invalid DSCP value"); 1054 } 1055 1056 if (code >= 32) 1057 *high |= 1 << (code - 32); 1058 else 1059 *low |= 1 << code; 1060 1061 s = a; 1062 } 1063 } 1064 1065 static struct _s_x icmpcodes[] = { 1066 { "net", ICMP_UNREACH_NET }, 1067 { "host", ICMP_UNREACH_HOST }, 1068 { "protocol", ICMP_UNREACH_PROTOCOL }, 1069 { "port", ICMP_UNREACH_PORT }, 1070 { "needfrag", ICMP_UNREACH_NEEDFRAG }, 1071 { "srcfail", ICMP_UNREACH_SRCFAIL }, 1072 { "net-unknown", ICMP_UNREACH_NET_UNKNOWN }, 1073 { "host-unknown", ICMP_UNREACH_HOST_UNKNOWN }, 1074 { "isolated", ICMP_UNREACH_ISOLATED }, 1075 { "net-prohib", ICMP_UNREACH_NET_PROHIB }, 1076 { "host-prohib", ICMP_UNREACH_HOST_PROHIB }, 1077 { "tosnet", ICMP_UNREACH_TOSNET }, 1078 { "toshost", ICMP_UNREACH_TOSHOST }, 1079 { "filter-prohib", ICMP_UNREACH_FILTER_PROHIB }, 1080 { "host-precedence", ICMP_UNREACH_HOST_PRECEDENCE }, 1081 { "precedence-cutoff", ICMP_UNREACH_PRECEDENCE_CUTOFF }, 1082 { NULL, 0 } 1083 }; 1084 1085 static void 1086 fill_reject_code(u_short *codep, char *str) 1087 { 1088 int val; 1089 char *s; 1090 1091 val = strtoul(str, &s, 0); 1092 if (s == str || *s != '\0' || val >= 0x100) 1093 val = match_token(icmpcodes, str); 1094 if (val < 0) 1095 errx(EX_DATAERR, "unknown ICMP unreachable code ``%s''", str); 1096 *codep = val; 1097 return; 1098 } 1099 1100 static void 1101 print_reject_code(struct buf_pr *bp, uint16_t code) 1102 { 1103 char const *s; 1104 1105 if ((s = match_value(icmpcodes, code)) != NULL) 1106 bprintf(bp, "unreach %s", s); 1107 else 1108 bprintf(bp, "unreach %u", code); 1109 } 1110 1111 /* 1112 * Returns the number of bits set (from left) in a contiguous bitmask, 1113 * or -1 if the mask is not contiguous. 1114 * XXX this needs a proper fix. 1115 * This effectively works on masks in big-endian (network) format. 1116 * when compiled on little endian architectures. 1117 * 1118 * First bit is bit 7 of the first byte -- note, for MAC addresses, 1119 * the first bit on the wire is bit 0 of the first byte. 1120 * len is the max length in bits. 1121 */ 1122 int 1123 contigmask(uint8_t *p, int len) 1124 { 1125 int i, n; 1126 1127 for (i=0; i<len ; i++) 1128 if ( (p[i/8] & (1 << (7 - (i%8)))) == 0) /* first bit unset */ 1129 break; 1130 for (n=i+1; n < len; n++) 1131 if ( (p[n/8] & (1 << (7 - (n%8)))) != 0) 1132 return -1; /* mask not contiguous */ 1133 return i; 1134 } 1135 1136 /* 1137 * print flags set/clear in the two bitmasks passed as parameters. 1138 * There is a specialized check for f_tcpflags. 1139 */ 1140 static void 1141 print_flags(struct buf_pr *bp, char const *name, ipfw_insn *cmd, 1142 struct _s_x *list) 1143 { 1144 char const *comma = ""; 1145 int i; 1146 uint8_t set = cmd->arg1 & 0xff; 1147 uint8_t clear = (cmd->arg1 >> 8) & 0xff; 1148 1149 if (list == f_tcpflags && set == TH_SYN && clear == TH_ACK) { 1150 bprintf(bp, " setup"); 1151 return; 1152 } 1153 1154 bprintf(bp, " %s ", name); 1155 for (i=0; list[i].x != 0; i++) { 1156 if (set & list[i].x) { 1157 set &= ~list[i].x; 1158 bprintf(bp, "%s%s", comma, list[i].s); 1159 comma = ","; 1160 } 1161 if (clear & list[i].x) { 1162 clear &= ~list[i].x; 1163 bprintf(bp, "%s!%s", comma, list[i].s); 1164 comma = ","; 1165 } 1166 } 1167 } 1168 1169 1170 /* 1171 * Print the ip address contained in a command. 1172 */ 1173 static void 1174 print_ip(struct buf_pr *bp, struct format_opts *fo, ipfw_insn_ip *cmd, 1175 char const *s) 1176 { 1177 struct hostent *he = NULL; 1178 struct in_addr *ia; 1179 uint32_t len = F_LEN((ipfw_insn *)cmd); 1180 uint32_t *a = ((ipfw_insn_u32 *)cmd)->d; 1181 char *t; 1182 1183 if (cmd->o.opcode == O_IP_DST_LOOKUP && len > F_INSN_SIZE(ipfw_insn_u32)) { 1184 uint32_t d = a[1]; 1185 const char *arg = "<invalid>"; 1186 1187 if (d < sizeof(lookup_key)/sizeof(lookup_key[0])) 1188 arg = match_value(rule_options, lookup_key[d]); 1189 t = table_search_ctlv(fo->tstate, ((ipfw_insn *)cmd)->arg1); 1190 bprintf(bp, "%s lookup %s %s", cmd->o.len & F_NOT ? " not": "", 1191 arg, t); 1192 return; 1193 } 1194 bprintf(bp, "%s%s ", cmd->o.len & F_NOT ? " not": "", s); 1195 1196 if (cmd->o.opcode == O_IP_SRC_ME || cmd->o.opcode == O_IP_DST_ME) { 1197 bprintf(bp, "me"); 1198 return; 1199 } 1200 if (cmd->o.opcode == O_IP_SRC_LOOKUP || 1201 cmd->o.opcode == O_IP_DST_LOOKUP) { 1202 t = table_search_ctlv(fo->tstate, ((ipfw_insn *)cmd)->arg1); 1203 bprintf(bp, "table(%s", t); 1204 if (len == F_INSN_SIZE(ipfw_insn_u32)) 1205 bprintf(bp, ",%u", *a); 1206 bprintf(bp, ")"); 1207 return; 1208 } 1209 if (cmd->o.opcode == O_IP_SRC_SET || cmd->o.opcode == O_IP_DST_SET) { 1210 uint32_t x, *map = (uint32_t *)&(cmd->mask); 1211 int i, j; 1212 char comma = '{'; 1213 1214 x = cmd->o.arg1 - 1; 1215 x = htonl( ~x ); 1216 cmd->addr.s_addr = htonl(cmd->addr.s_addr); 1217 bprintf(bp, "%s/%d", inet_ntoa(cmd->addr), 1218 contigmask((uint8_t *)&x, 32)); 1219 x = cmd->addr.s_addr = htonl(cmd->addr.s_addr); 1220 x &= 0xff; /* base */ 1221 /* 1222 * Print bits and ranges. 1223 * Locate first bit set (i), then locate first bit unset (j). 1224 * If we have 3+ consecutive bits set, then print them as a 1225 * range, otherwise only print the initial bit and rescan. 1226 */ 1227 for (i=0; i < cmd->o.arg1; i++) 1228 if (map[i/32] & (1<<(i & 31))) { 1229 for (j=i+1; j < cmd->o.arg1; j++) 1230 if (!(map[ j/32] & (1<<(j & 31)))) 1231 break; 1232 bprintf(bp, "%c%d", comma, i+x); 1233 if (j>i+2) { /* range has at least 3 elements */ 1234 bprintf(bp, "-%d", j-1+x); 1235 i = j-1; 1236 } 1237 comma = ','; 1238 } 1239 bprintf(bp, "}"); 1240 return; 1241 } 1242 /* 1243 * len == 2 indicates a single IP, whereas lists of 1 or more 1244 * addr/mask pairs have len = (2n+1). We convert len to n so we 1245 * use that to count the number of entries. 1246 */ 1247 for (len = len / 2; len > 0; len--, a += 2) { 1248 int mb = /* mask length */ 1249 (cmd->o.opcode == O_IP_SRC || cmd->o.opcode == O_IP_DST) ? 1250 32 : contigmask((uint8_t *)&(a[1]), 32); 1251 if (mb == 32 && co.do_resolv) 1252 he = gethostbyaddr((char *)&(a[0]), sizeof(u_long), AF_INET); 1253 if (he != NULL) /* resolved to name */ 1254 bprintf(bp, "%s", he->h_name); 1255 else if (mb == 0) /* any */ 1256 bprintf(bp, "any"); 1257 else { /* numeric IP followed by some kind of mask */ 1258 ia = (struct in_addr *)&a[0]; 1259 bprintf(bp, "%s", inet_ntoa(*ia)); 1260 if (mb < 0) { 1261 ia = (struct in_addr *)&a[1]; 1262 bprintf(bp, ":%s", inet_ntoa(*ia)); 1263 } else if (mb < 32) 1264 bprintf(bp, "/%d", mb); 1265 } 1266 if (len > 1) 1267 bprintf(bp, ","); 1268 } 1269 } 1270 1271 /* 1272 * prints a MAC address/mask pair 1273 */ 1274 static void 1275 print_mac(struct buf_pr *bp, uint8_t *addr, uint8_t *mask) 1276 { 1277 int l = contigmask(mask, 48); 1278 1279 if (l == 0) 1280 bprintf(bp, " any"); 1281 else { 1282 bprintf(bp, " %02x:%02x:%02x:%02x:%02x:%02x", 1283 addr[0], addr[1], addr[2], addr[3], addr[4], addr[5]); 1284 if (l == -1) 1285 bprintf(bp, "&%02x:%02x:%02x:%02x:%02x:%02x", 1286 mask[0], mask[1], mask[2], 1287 mask[3], mask[4], mask[5]); 1288 else if (l < 48) 1289 bprintf(bp, "/%d", l); 1290 } 1291 } 1292 1293 static void 1294 fill_icmptypes(ipfw_insn_u32 *cmd, char *av) 1295 { 1296 uint8_t type; 1297 1298 cmd->d[0] = 0; 1299 while (*av) { 1300 if (*av == ',') 1301 av++; 1302 1303 type = strtoul(av, &av, 0); 1304 1305 if (*av != ',' && *av != '\0') 1306 errx(EX_DATAERR, "invalid ICMP type"); 1307 1308 if (type > 31) 1309 errx(EX_DATAERR, "ICMP type out of range"); 1310 1311 cmd->d[0] |= 1 << type; 1312 } 1313 cmd->o.opcode = O_ICMPTYPE; 1314 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32); 1315 } 1316 1317 static void 1318 print_icmptypes(struct buf_pr *bp, ipfw_insn_u32 *cmd) 1319 { 1320 int i; 1321 char sep= ' '; 1322 1323 bprintf(bp, " icmptypes"); 1324 for (i = 0; i < 32; i++) { 1325 if ( (cmd->d[0] & (1 << (i))) == 0) 1326 continue; 1327 bprintf(bp, "%c%d", sep, i); 1328 sep = ','; 1329 } 1330 } 1331 1332 static void 1333 print_dscp(struct buf_pr *bp, ipfw_insn_u32 *cmd) 1334 { 1335 int i = 0; 1336 uint32_t *v; 1337 char sep= ' '; 1338 const char *code; 1339 1340 bprintf(bp, " dscp"); 1341 v = cmd->d; 1342 while (i < 64) { 1343 if (*v & (1 << i)) { 1344 if ((code = match_value(f_ipdscp, i)) != NULL) 1345 bprintf(bp, "%c%s", sep, code); 1346 else 1347 bprintf(bp, "%c%d", sep, i); 1348 sep = ','; 1349 } 1350 1351 if ((++i % 32) == 0) 1352 v++; 1353 } 1354 } 1355 1356 /* 1357 * show_ipfw() prints the body of an ipfw rule. 1358 * Because the standard rule has at least proto src_ip dst_ip, we use 1359 * a helper function to produce these entries if not provided explicitly. 1360 * The first argument is the list of fields we have, the second is 1361 * the list of fields we want to be printed. 1362 * 1363 * Special cases if we have provided a MAC header: 1364 * + if the rule does not contain IP addresses/ports, do not print them; 1365 * + if the rule does not contain an IP proto, print "all" instead of "ip"; 1366 * 1367 * Once we have 'have_options', IP header fields are printed as options. 1368 */ 1369 #define HAVE_PROTO 0x0001 1370 #define HAVE_SRCIP 0x0002 1371 #define HAVE_DSTIP 0x0004 1372 #define HAVE_PROTO4 0x0008 1373 #define HAVE_PROTO6 0x0010 1374 #define HAVE_IP 0x0100 1375 #define HAVE_OPTIONS 0x8000 1376 1377 static void 1378 show_prerequisites(struct buf_pr *bp, int *flags, int want, int cmd) 1379 { 1380 (void)cmd; /* UNUSED */ 1381 if (co.comment_only) 1382 return; 1383 if ( (*flags & HAVE_IP) == HAVE_IP) 1384 *flags |= HAVE_OPTIONS; 1385 1386 if ( !(*flags & HAVE_OPTIONS)) { 1387 if ( !(*flags & HAVE_PROTO) && (want & HAVE_PROTO)) { 1388 if ( (*flags & HAVE_PROTO4)) 1389 bprintf(bp, " ip4"); 1390 else if ( (*flags & HAVE_PROTO6)) 1391 bprintf(bp, " ip6"); 1392 else 1393 bprintf(bp, " ip"); 1394 } 1395 if ( !(*flags & HAVE_SRCIP) && (want & HAVE_SRCIP)) 1396 bprintf(bp, " from any"); 1397 if ( !(*flags & HAVE_DSTIP) && (want & HAVE_DSTIP)) 1398 bprintf(bp, " to any"); 1399 } 1400 *flags |= want; 1401 } 1402 1403 static void 1404 show_static_rule(struct cmdline_opts *co, struct format_opts *fo, 1405 struct buf_pr *bp, struct ip_fw_rule *rule, struct ip_fw_bcounter *cntr) 1406 { 1407 static int twidth = 0; 1408 int l; 1409 ipfw_insn *cmd, *has_eaction = NULL, *tagptr = NULL; 1410 const char *comment = NULL; /* ptr to comment if we have one */ 1411 const char *ename; 1412 int proto = 0; /* default */ 1413 int flags = 0; /* prerequisites */ 1414 ipfw_insn_log *logptr = NULL; /* set if we find an O_LOG */ 1415 ipfw_insn_altq *altqptr = NULL; /* set if we find an O_ALTQ */ 1416 int or_block = 0; /* we are in an or block */ 1417 uint32_t uval; 1418 1419 if ((fo->set_mask & (1 << rule->set)) == 0) { 1420 /* disabled mask */ 1421 if (!co->show_sets) 1422 return; 1423 else 1424 bprintf(bp, "# DISABLED "); 1425 } 1426 bprintf(bp, "%05u ", rule->rulenum); 1427 1428 /* Print counters if enabled */ 1429 if (fo->pcwidth > 0 || fo->bcwidth > 0) { 1430 pr_u64(bp, &cntr->pcnt, fo->pcwidth); 1431 pr_u64(bp, &cntr->bcnt, fo->bcwidth); 1432 } 1433 1434 if (co->do_time == 2) 1435 bprintf(bp, "%10u ", cntr->timestamp); 1436 else if (co->do_time == 1) { 1437 char timestr[30]; 1438 time_t t = (time_t)0; 1439 1440 if (twidth == 0) { 1441 strcpy(timestr, ctime(&t)); 1442 *strchr(timestr, '\n') = '\0'; 1443 twidth = strlen(timestr); 1444 } 1445 if (cntr->timestamp > 0) { 1446 t = _long_to_time(cntr->timestamp); 1447 1448 strcpy(timestr, ctime(&t)); 1449 *strchr(timestr, '\n') = '\0'; 1450 bprintf(bp, "%s ", timestr); 1451 } else { 1452 bprintf(bp, "%*s", twidth, " "); 1453 } 1454 } 1455 1456 if (co->show_sets) 1457 bprintf(bp, "set %d ", rule->set); 1458 1459 /* 1460 * print the optional "match probability" 1461 */ 1462 if (rule->cmd_len > 0) { 1463 cmd = rule->cmd ; 1464 if (cmd->opcode == O_PROB) { 1465 ipfw_insn_u32 *p = (ipfw_insn_u32 *)cmd; 1466 double d = 1.0 * p->d[0]; 1467 1468 d = (d / 0x7fffffff); 1469 bprintf(bp, "prob %f ", d); 1470 } 1471 } 1472 1473 /* 1474 * first print actions 1475 */ 1476 for (l = rule->cmd_len - rule->act_ofs, cmd = ACTION_PTR(rule); 1477 l > 0 ; l -= F_LEN(cmd), cmd += F_LEN(cmd)) { 1478 switch(cmd->opcode) { 1479 case O_CHECK_STATE: 1480 bprintf(bp, "check-state"); 1481 if (cmd->arg1 != 0) 1482 ename = object_search_ctlv(fo->tstate, 1483 cmd->arg1, IPFW_TLV_STATE_NAME); 1484 else 1485 ename = NULL; 1486 bprintf(bp, " %s", ename ? ename: "any"); 1487 /* avoid printing anything else */ 1488 flags = HAVE_PROTO | HAVE_SRCIP | 1489 HAVE_DSTIP | HAVE_IP; 1490 break; 1491 1492 case O_ACCEPT: 1493 bprintf(bp, "allow"); 1494 break; 1495 1496 case O_COUNT: 1497 bprintf(bp, "count"); 1498 break; 1499 1500 case O_DENY: 1501 bprintf(bp, "deny"); 1502 break; 1503 1504 case O_REJECT: 1505 if (cmd->arg1 == ICMP_REJECT_RST) 1506 bprintf(bp, "reset"); 1507 else if (cmd->arg1 == ICMP_UNREACH_HOST) 1508 bprintf(bp, "reject"); 1509 else 1510 print_reject_code(bp, cmd->arg1); 1511 break; 1512 1513 case O_UNREACH6: 1514 if (cmd->arg1 == ICMP6_UNREACH_RST) 1515 bprintf(bp, "reset6"); 1516 else 1517 print_unreach6_code(bp, cmd->arg1); 1518 break; 1519 1520 case O_SKIPTO: 1521 bprint_uint_arg(bp, "skipto ", cmd->arg1); 1522 break; 1523 1524 case O_PIPE: 1525 bprint_uint_arg(bp, "pipe ", cmd->arg1); 1526 break; 1527 1528 case O_QUEUE: 1529 bprint_uint_arg(bp, "queue ", cmd->arg1); 1530 break; 1531 1532 case O_DIVERT: 1533 bprint_uint_arg(bp, "divert ", cmd->arg1); 1534 break; 1535 1536 case O_TEE: 1537 bprint_uint_arg(bp, "tee ", cmd->arg1); 1538 break; 1539 1540 case O_NETGRAPH: 1541 bprint_uint_arg(bp, "netgraph ", cmd->arg1); 1542 break; 1543 1544 case O_NGTEE: 1545 bprint_uint_arg(bp, "ngtee ", cmd->arg1); 1546 break; 1547 1548 case O_FORWARD_IP: 1549 { 1550 ipfw_insn_sa *s = (ipfw_insn_sa *)cmd; 1551 1552 if (s->sa.sin_addr.s_addr == INADDR_ANY) { 1553 bprintf(bp, "fwd tablearg"); 1554 } else { 1555 bprintf(bp, "fwd %s",inet_ntoa(s->sa.sin_addr)); 1556 } 1557 if (s->sa.sin_port) 1558 bprintf(bp, ",%d", s->sa.sin_port); 1559 } 1560 break; 1561 1562 case O_FORWARD_IP6: 1563 { 1564 char buf[INET6_ADDRSTRLEN + IF_NAMESIZE + 2]; 1565 ipfw_insn_sa6 *s = (ipfw_insn_sa6 *)cmd; 1566 1567 bprintf(bp, "fwd "); 1568 if (getnameinfo((const struct sockaddr *)&s->sa, 1569 sizeof(struct sockaddr_in6), buf, sizeof(buf), 1570 NULL, 0, NI_NUMERICHOST) == 0) 1571 bprintf(bp, "%s", buf); 1572 if (s->sa.sin6_port) 1573 bprintf(bp, ",%d", s->sa.sin6_port); 1574 } 1575 break; 1576 1577 case O_LOG: /* O_LOG is printed last */ 1578 logptr = (ipfw_insn_log *)cmd; 1579 break; 1580 1581 case O_ALTQ: /* O_ALTQ is printed after O_LOG */ 1582 altqptr = (ipfw_insn_altq *)cmd; 1583 break; 1584 1585 case O_TAG: 1586 tagptr = cmd; 1587 break; 1588 1589 case O_NAT: 1590 if (cmd->arg1 != IP_FW_NAT44_GLOBAL) 1591 bprint_uint_arg(bp, "nat ", cmd->arg1); 1592 else 1593 bprintf(bp, "nat global"); 1594 break; 1595 1596 case O_SETFIB: 1597 if (cmd->arg1 == IP_FW_TARG) 1598 bprint_uint_arg(bp, "setfib ", cmd->arg1); 1599 else 1600 bprintf(bp, "setfib %u", cmd->arg1 & 0x7FFF); 1601 break; 1602 1603 case O_EXTERNAL_ACTION: { 1604 /* 1605 * The external action can consists of two following 1606 * each other opcodes - O_EXTERNAL_ACTION and 1607 * O_EXTERNAL_INSTANCE. The first contains the ID of 1608 * name of external action. The second contains the ID 1609 * of name of external action instance. 1610 * NOTE: in case when external action has no named 1611 * instances support, the second opcode isn't needed. 1612 */ 1613 has_eaction = cmd; 1614 ename = object_search_ctlv(fo->tstate, cmd->arg1, 1615 IPFW_TLV_EACTION); 1616 if (match_token(rule_eactions, ename) != -1) 1617 bprintf(bp, "%s", ename); 1618 else 1619 bprintf(bp, "eaction %s", ename); 1620 break; 1621 } 1622 1623 case O_EXTERNAL_INSTANCE: { 1624 if (has_eaction == NULL) 1625 break; 1626 /* 1627 * XXX: we need to teach ipfw(9) to rewrite opcodes 1628 * in the user buffer on rule addition. When we add 1629 * the rule, we specify zero TLV type for 1630 * O_EXTERNAL_INSTANCE object. To show correct 1631 * rule after `ipfw add` we need to search instance 1632 * name with zero type. But when we do `ipfw show` 1633 * we calculate TLV type using IPFW_TLV_EACTION_NAME() 1634 * macro. 1635 */ 1636 ename = object_search_ctlv(fo->tstate, cmd->arg1, 0); 1637 if (ename == NULL) 1638 ename = object_search_ctlv(fo->tstate, 1639 cmd->arg1, 1640 IPFW_TLV_EACTION_NAME(has_eaction->arg1)); 1641 bprintf(bp, " %s", ename); 1642 break; 1643 } 1644 1645 case O_SETDSCP: 1646 { 1647 const char *code; 1648 1649 if (cmd->arg1 == IP_FW_TARG) { 1650 bprint_uint_arg(bp, "setdscp ", cmd->arg1); 1651 break; 1652 } 1653 uval = cmd->arg1 & 0x3F; 1654 if ((code = match_value(f_ipdscp, uval)) != NULL) 1655 bprintf(bp, "setdscp %s", code); 1656 else 1657 bprint_uint_arg(bp, "setdscp ", uval); 1658 } 1659 break; 1660 1661 case O_REASS: 1662 bprintf(bp, "reass"); 1663 break; 1664 1665 case O_CALLRETURN: 1666 if (cmd->len & F_NOT) 1667 bprintf(bp, "return"); 1668 else 1669 bprint_uint_arg(bp, "call ", cmd->arg1); 1670 break; 1671 1672 default: 1673 bprintf(bp, "** unrecognized action %d len %d ", 1674 cmd->opcode, cmd->len); 1675 } 1676 } 1677 if (logptr) { 1678 if (logptr->max_log > 0) 1679 bprintf(bp, " log logamount %d", logptr->max_log); 1680 else 1681 bprintf(bp, " log"); 1682 } 1683 #ifndef NO_ALTQ 1684 if (altqptr) { 1685 print_altq_cmd(bp, altqptr); 1686 } 1687 #endif 1688 if (tagptr) { 1689 if (tagptr->len & F_NOT) 1690 bprint_uint_arg(bp, " untag ", tagptr->arg1); 1691 else 1692 bprint_uint_arg(bp, " tag ", tagptr->arg1); 1693 } 1694 1695 /* 1696 * then print the body. 1697 */ 1698 for (l = rule->act_ofs, cmd = rule->cmd; 1699 l > 0 ; l -= F_LEN(cmd) , cmd += F_LEN(cmd)) { 1700 if ((cmd->len & F_OR) || (cmd->len & F_NOT)) 1701 continue; 1702 if (cmd->opcode == O_IP4) { 1703 flags |= HAVE_PROTO4; 1704 break; 1705 } else if (cmd->opcode == O_IP6) { 1706 flags |= HAVE_PROTO6; 1707 break; 1708 } 1709 } 1710 if (rule->flags & IPFW_RULE_NOOPT) { /* empty rules before options */ 1711 if (!co->do_compact) { 1712 show_prerequisites(bp, &flags, HAVE_PROTO, 0); 1713 bprintf(bp, " from any to any"); 1714 } 1715 flags |= HAVE_IP | HAVE_OPTIONS | HAVE_PROTO | 1716 HAVE_SRCIP | HAVE_DSTIP; 1717 } 1718 1719 if (co->comment_only) 1720 comment = "..."; 1721 1722 for (l = rule->act_ofs, cmd = rule->cmd; 1723 l > 0 ; l -= F_LEN(cmd) , cmd += F_LEN(cmd)) { 1724 /* useful alias */ 1725 ipfw_insn_u32 *cmd32 = (ipfw_insn_u32 *)cmd; 1726 1727 if (co->comment_only) { 1728 if (cmd->opcode != O_NOP) 1729 continue; 1730 bprintf(bp, " // %s\n", (char *)(cmd + 1)); 1731 return; 1732 } 1733 1734 show_prerequisites(bp, &flags, 0, cmd->opcode); 1735 1736 switch(cmd->opcode) { 1737 case O_PROB: 1738 break; /* done already */ 1739 1740 case O_PROBE_STATE: 1741 break; /* no need to print anything here */ 1742 1743 case O_IP_SRC: 1744 case O_IP_SRC_LOOKUP: 1745 case O_IP_SRC_MASK: 1746 case O_IP_SRC_ME: 1747 case O_IP_SRC_SET: 1748 show_prerequisites(bp, &flags, HAVE_PROTO, 0); 1749 if (!(flags & HAVE_SRCIP)) 1750 bprintf(bp, " from"); 1751 if ((cmd->len & F_OR) && !or_block) 1752 bprintf(bp, " {"); 1753 print_ip(bp, fo, (ipfw_insn_ip *)cmd, 1754 (flags & HAVE_OPTIONS) ? " src-ip" : ""); 1755 flags |= HAVE_SRCIP; 1756 break; 1757 1758 case O_IP_DST: 1759 case O_IP_DST_LOOKUP: 1760 case O_IP_DST_MASK: 1761 case O_IP_DST_ME: 1762 case O_IP_DST_SET: 1763 show_prerequisites(bp, &flags, HAVE_PROTO|HAVE_SRCIP, 0); 1764 if (!(flags & HAVE_DSTIP)) 1765 bprintf(bp, " to"); 1766 if ((cmd->len & F_OR) && !or_block) 1767 bprintf(bp, " {"); 1768 print_ip(bp, fo, (ipfw_insn_ip *)cmd, 1769 (flags & HAVE_OPTIONS) ? " dst-ip" : ""); 1770 flags |= HAVE_DSTIP; 1771 break; 1772 1773 case O_IP6_SRC: 1774 case O_IP6_SRC_MASK: 1775 case O_IP6_SRC_ME: 1776 show_prerequisites(bp, &flags, HAVE_PROTO, 0); 1777 if (!(flags & HAVE_SRCIP)) 1778 bprintf(bp, " from"); 1779 if ((cmd->len & F_OR) && !or_block) 1780 bprintf(bp, " {"); 1781 print_ip6(bp, (ipfw_insn_ip6 *)cmd, 1782 (flags & HAVE_OPTIONS) ? " src-ip6" : ""); 1783 flags |= HAVE_SRCIP | HAVE_PROTO; 1784 break; 1785 1786 case O_IP6_DST: 1787 case O_IP6_DST_MASK: 1788 case O_IP6_DST_ME: 1789 show_prerequisites(bp, &flags, HAVE_PROTO|HAVE_SRCIP, 0); 1790 if (!(flags & HAVE_DSTIP)) 1791 bprintf(bp, " to"); 1792 if ((cmd->len & F_OR) && !or_block) 1793 bprintf(bp, " {"); 1794 print_ip6(bp, (ipfw_insn_ip6 *)cmd, 1795 (flags & HAVE_OPTIONS) ? " dst-ip6" : ""); 1796 flags |= HAVE_DSTIP; 1797 break; 1798 1799 case O_FLOW6ID: 1800 print_flow6id(bp, (ipfw_insn_u32 *) cmd ); 1801 flags |= HAVE_OPTIONS; 1802 break; 1803 1804 case O_IP_DSTPORT: 1805 show_prerequisites(bp, &flags, 1806 HAVE_PROTO | HAVE_SRCIP | 1807 HAVE_DSTIP | HAVE_IP, 0); 1808 case O_IP_SRCPORT: 1809 if (flags & HAVE_DSTIP) 1810 flags |= HAVE_IP; 1811 show_prerequisites(bp, &flags, 1812 HAVE_PROTO | HAVE_SRCIP, 0); 1813 if ((cmd->len & F_OR) && !or_block) 1814 bprintf(bp, " {"); 1815 if (cmd->len & F_NOT) 1816 bprintf(bp, " not"); 1817 print_newports(bp, (ipfw_insn_u16 *)cmd, proto, 1818 (flags & HAVE_OPTIONS) ? cmd->opcode : 0); 1819 break; 1820 1821 case O_PROTO: { 1822 struct protoent *pe = NULL; 1823 1824 if ((cmd->len & F_OR) && !or_block) 1825 bprintf(bp, " {"); 1826 if (cmd->len & F_NOT) 1827 bprintf(bp, " not"); 1828 proto = cmd->arg1; 1829 pe = getprotobynumber(cmd->arg1); 1830 if ((flags & (HAVE_PROTO4 | HAVE_PROTO6)) && 1831 !(flags & HAVE_PROTO)) 1832 show_prerequisites(bp, &flags, 1833 HAVE_PROTO | HAVE_IP | HAVE_SRCIP | 1834 HAVE_DSTIP | HAVE_OPTIONS, 0); 1835 if (flags & HAVE_OPTIONS) 1836 bprintf(bp, " proto"); 1837 if (pe) 1838 bprintf(bp, " %s", pe->p_name); 1839 else 1840 bprintf(bp, " %u", cmd->arg1); 1841 } 1842 flags |= HAVE_PROTO; 1843 break; 1844 1845 default: /*options ... */ 1846 if (!(cmd->len & (F_OR|F_NOT))) 1847 if (((cmd->opcode == O_IP6) && 1848 (flags & HAVE_PROTO6)) || 1849 ((cmd->opcode == O_IP4) && 1850 (flags & HAVE_PROTO4))) 1851 break; 1852 show_prerequisites(bp, &flags, HAVE_PROTO | HAVE_SRCIP | 1853 HAVE_DSTIP | HAVE_IP | HAVE_OPTIONS, 0); 1854 if ((cmd->len & F_OR) && !or_block) 1855 bprintf(bp, " {"); 1856 if (cmd->len & F_NOT && cmd->opcode != O_IN) 1857 bprintf(bp, " not"); 1858 switch(cmd->opcode) { 1859 case O_MACADDR2: { 1860 ipfw_insn_mac *m = (ipfw_insn_mac *)cmd; 1861 1862 bprintf(bp, " MAC"); 1863 print_mac(bp, m->addr, m->mask); 1864 print_mac(bp, m->addr + 6, m->mask + 6); 1865 } 1866 break; 1867 1868 case O_MAC_TYPE: 1869 print_newports(bp, (ipfw_insn_u16 *)cmd, 1870 IPPROTO_ETHERTYPE, cmd->opcode); 1871 break; 1872 1873 1874 case O_FRAG: 1875 bprintf(bp, " frag"); 1876 break; 1877 1878 case O_FIB: 1879 bprintf(bp, " fib %u", cmd->arg1 ); 1880 break; 1881 case O_SOCKARG: 1882 bprintf(bp, " sockarg"); 1883 break; 1884 1885 case O_IN: 1886 bprintf(bp, cmd->len & F_NOT ? " out" : " in"); 1887 break; 1888 1889 case O_DIVERTED: 1890 switch (cmd->arg1) { 1891 case 3: 1892 bprintf(bp, " diverted"); 1893 break; 1894 case 1: 1895 bprintf(bp, " diverted-loopback"); 1896 break; 1897 case 2: 1898 bprintf(bp, " diverted-output"); 1899 break; 1900 default: 1901 bprintf(bp, " diverted-?<%u>", cmd->arg1); 1902 break; 1903 } 1904 break; 1905 1906 case O_LAYER2: 1907 bprintf(bp, " layer2"); 1908 break; 1909 case O_XMIT: 1910 case O_RECV: 1911 case O_VIA: 1912 { 1913 char const *s, *t; 1914 ipfw_insn_if *cmdif = (ipfw_insn_if *)cmd; 1915 1916 if (cmd->opcode == O_XMIT) 1917 s = "xmit"; 1918 else if (cmd->opcode == O_RECV) 1919 s = "recv"; 1920 else /* if (cmd->opcode == O_VIA) */ 1921 s = "via"; 1922 if (cmdif->name[0] == '\0') 1923 bprintf(bp, " %s %s", s, 1924 inet_ntoa(cmdif->p.ip)); 1925 else if (cmdif->name[0] == '\1') { 1926 /* interface table */ 1927 t = table_search_ctlv(fo->tstate, 1928 cmdif->p.kidx); 1929 bprintf(bp, " %s table(%s)", s, t); 1930 } else 1931 bprintf(bp, " %s %s", s, cmdif->name); 1932 1933 break; 1934 } 1935 case O_IP_FLOW_LOOKUP: 1936 { 1937 char *t; 1938 1939 t = table_search_ctlv(fo->tstate, cmd->arg1); 1940 bprintf(bp, " flow table(%s", t); 1941 if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_u32)) 1942 bprintf(bp, ",%u", 1943 ((ipfw_insn_u32 *)cmd)->d[0]); 1944 bprintf(bp, ")"); 1945 break; 1946 } 1947 case O_IPID: 1948 if (F_LEN(cmd) == 1) 1949 bprintf(bp, " ipid %u", cmd->arg1 ); 1950 else 1951 print_newports(bp, (ipfw_insn_u16 *)cmd, 0, 1952 O_IPID); 1953 break; 1954 1955 case O_IPTTL: 1956 if (F_LEN(cmd) == 1) 1957 bprintf(bp, " ipttl %u", cmd->arg1 ); 1958 else 1959 print_newports(bp, (ipfw_insn_u16 *)cmd, 0, 1960 O_IPTTL); 1961 break; 1962 1963 case O_IPVER: 1964 bprintf(bp, " ipver %u", cmd->arg1 ); 1965 break; 1966 1967 case O_IPPRECEDENCE: 1968 bprintf(bp, " ipprecedence %u", cmd->arg1 >> 5); 1969 break; 1970 1971 case O_DSCP: 1972 print_dscp(bp, (ipfw_insn_u32 *)cmd); 1973 break; 1974 1975 case O_IPLEN: 1976 if (F_LEN(cmd) == 1) 1977 bprintf(bp, " iplen %u", cmd->arg1 ); 1978 else 1979 print_newports(bp, (ipfw_insn_u16 *)cmd, 0, 1980 O_IPLEN); 1981 break; 1982 1983 case O_IPOPT: 1984 print_flags(bp, "ipoptions", cmd, f_ipopts); 1985 break; 1986 1987 case O_IPTOS: 1988 print_flags(bp, "iptos", cmd, f_iptos); 1989 break; 1990 1991 case O_ICMPTYPE: 1992 print_icmptypes(bp, (ipfw_insn_u32 *)cmd); 1993 break; 1994 1995 case O_ESTAB: 1996 bprintf(bp, " established"); 1997 break; 1998 1999 case O_TCPDATALEN: 2000 if (F_LEN(cmd) == 1) 2001 bprintf(bp, " tcpdatalen %u", cmd->arg1 ); 2002 else 2003 print_newports(bp, (ipfw_insn_u16 *)cmd, 0, 2004 O_TCPDATALEN); 2005 break; 2006 2007 case O_TCPFLAGS: 2008 print_flags(bp, "tcpflags", cmd, f_tcpflags); 2009 break; 2010 2011 case O_TCPOPTS: 2012 print_flags(bp, "tcpoptions", cmd, f_tcpopts); 2013 break; 2014 2015 case O_TCPWIN: 2016 if (F_LEN(cmd) == 1) 2017 bprintf(bp, " tcpwin %u", cmd->arg1); 2018 else 2019 print_newports(bp, (ipfw_insn_u16 *)cmd, 0, 2020 O_TCPWIN); 2021 break; 2022 2023 case O_TCPACK: 2024 bprintf(bp, " tcpack %d", ntohl(cmd32->d[0])); 2025 break; 2026 2027 case O_TCPSEQ: 2028 bprintf(bp, " tcpseq %d", ntohl(cmd32->d[0])); 2029 break; 2030 2031 case O_UID: 2032 { 2033 struct passwd *pwd = getpwuid(cmd32->d[0]); 2034 2035 if (pwd) 2036 bprintf(bp, " uid %s", pwd->pw_name); 2037 else 2038 bprintf(bp, " uid %u", cmd32->d[0]); 2039 } 2040 break; 2041 2042 case O_GID: 2043 { 2044 struct group *grp = getgrgid(cmd32->d[0]); 2045 2046 if (grp) 2047 bprintf(bp, " gid %s", grp->gr_name); 2048 else 2049 bprintf(bp, " gid %u", cmd32->d[0]); 2050 } 2051 break; 2052 2053 case O_JAIL: 2054 bprintf(bp, " jail %d", cmd32->d[0]); 2055 break; 2056 2057 case O_VERREVPATH: 2058 bprintf(bp, " verrevpath"); 2059 break; 2060 2061 case O_VERSRCREACH: 2062 bprintf(bp, " versrcreach"); 2063 break; 2064 2065 case O_ANTISPOOF: 2066 bprintf(bp, " antispoof"); 2067 break; 2068 2069 case O_IPSEC: 2070 bprintf(bp, " ipsec"); 2071 break; 2072 2073 case O_NOP: 2074 comment = (char *)(cmd + 1); 2075 break; 2076 2077 case O_KEEP_STATE: 2078 bprintf(bp, " keep-state"); 2079 bprintf(bp, " %s", 2080 object_search_ctlv(fo->tstate, cmd->arg1, 2081 IPFW_TLV_STATE_NAME)); 2082 break; 2083 2084 case O_LIMIT: { 2085 struct _s_x *p = limit_masks; 2086 ipfw_insn_limit *c = (ipfw_insn_limit *)cmd; 2087 uint8_t x = c->limit_mask; 2088 char const *comma = " "; 2089 2090 bprintf(bp, " limit"); 2091 for (; p->x != 0 ; p++) 2092 if ((x & p->x) == p->x) { 2093 x &= ~p->x; 2094 bprintf(bp, "%s%s", comma,p->s); 2095 comma = ","; 2096 } 2097 bprint_uint_arg(bp, " ", c->conn_limit); 2098 bprintf(bp, " %s", 2099 object_search_ctlv(fo->tstate, cmd->arg1, 2100 IPFW_TLV_STATE_NAME)); 2101 break; 2102 } 2103 2104 case O_IP6: 2105 bprintf(bp, " ip6"); 2106 break; 2107 2108 case O_IP4: 2109 bprintf(bp, " ip4"); 2110 break; 2111 2112 case O_ICMP6TYPE: 2113 print_icmp6types(bp, (ipfw_insn_u32 *)cmd); 2114 break; 2115 2116 case O_EXT_HDR: 2117 print_ext6hdr(bp, (ipfw_insn *)cmd); 2118 break; 2119 2120 case O_TAGGED: 2121 if (F_LEN(cmd) == 1) 2122 bprint_uint_arg(bp, " tagged ", 2123 cmd->arg1); 2124 else 2125 print_newports(bp, (ipfw_insn_u16 *)cmd, 2126 0, O_TAGGED); 2127 break; 2128 2129 default: 2130 bprintf(bp, " [opcode %d len %d]", 2131 cmd->opcode, cmd->len); 2132 } 2133 } 2134 if (cmd->len & F_OR) { 2135 bprintf(bp, " or"); 2136 or_block = 1; 2137 } else if (or_block) { 2138 bprintf(bp, " }"); 2139 or_block = 0; 2140 } 2141 } 2142 show_prerequisites(bp, &flags, HAVE_PROTO | HAVE_SRCIP | HAVE_DSTIP 2143 | HAVE_IP, 0); 2144 if (comment) 2145 bprintf(bp, " // %s", comment); 2146 bprintf(bp, "\n"); 2147 } 2148 2149 static void 2150 show_dyn_state(struct cmdline_opts *co, struct format_opts *fo, 2151 struct buf_pr *bp, ipfw_dyn_rule *d) 2152 { 2153 struct protoent *pe; 2154 struct in_addr a; 2155 uint16_t rulenum; 2156 char buf[INET6_ADDRSTRLEN]; 2157 2158 if (!co->do_expired) { 2159 if (!d->expire && !(d->dyn_type == O_LIMIT_PARENT)) 2160 return; 2161 } 2162 bcopy(&d->rule, &rulenum, sizeof(rulenum)); 2163 bprintf(bp, "%05d", rulenum); 2164 if (fo->pcwidth > 0 || fo->bcwidth > 0) { 2165 bprintf(bp, " "); 2166 pr_u64(bp, &d->pcnt, fo->pcwidth); 2167 pr_u64(bp, &d->bcnt, fo->bcwidth); 2168 bprintf(bp, "(%ds)", d->expire); 2169 } 2170 switch (d->dyn_type) { 2171 case O_LIMIT_PARENT: 2172 bprintf(bp, " PARENT %d", d->count); 2173 break; 2174 case O_LIMIT: 2175 bprintf(bp, " LIMIT"); 2176 break; 2177 case O_KEEP_STATE: /* bidir, no mask */ 2178 bprintf(bp, " STATE"); 2179 break; 2180 } 2181 2182 if ((pe = getprotobynumber(d->id.proto)) != NULL) 2183 bprintf(bp, " %s", pe->p_name); 2184 else 2185 bprintf(bp, " proto %u", d->id.proto); 2186 2187 if (d->id.addr_type == 4) { 2188 a.s_addr = htonl(d->id.src_ip); 2189 bprintf(bp, " %s %d", inet_ntoa(a), d->id.src_port); 2190 2191 a.s_addr = htonl(d->id.dst_ip); 2192 bprintf(bp, " <-> %s %d", inet_ntoa(a), d->id.dst_port); 2193 } else if (d->id.addr_type == 6) { 2194 bprintf(bp, " %s %d", inet_ntop(AF_INET6, &d->id.src_ip6, buf, 2195 sizeof(buf)), d->id.src_port); 2196 bprintf(bp, " <-> %s %d", inet_ntop(AF_INET6, &d->id.dst_ip6, 2197 buf, sizeof(buf)), d->id.dst_port); 2198 } else 2199 bprintf(bp, " UNKNOWN <-> UNKNOWN"); 2200 if (d->kidx != 0) 2201 bprintf(bp, " %s", object_search_ctlv(fo->tstate, 2202 d->kidx, IPFW_TLV_STATE_NAME)); 2203 } 2204 2205 static int 2206 do_range_cmd(int cmd, ipfw_range_tlv *rt) 2207 { 2208 ipfw_range_header rh; 2209 size_t sz; 2210 2211 memset(&rh, 0, sizeof(rh)); 2212 memcpy(&rh.range, rt, sizeof(*rt)); 2213 rh.range.head.length = sizeof(*rt); 2214 rh.range.head.type = IPFW_TLV_RANGE; 2215 sz = sizeof(rh); 2216 2217 if (do_get3(cmd, &rh.opheader, &sz) != 0) 2218 return (-1); 2219 /* Save number of matched objects */ 2220 rt->new_set = rh.range.new_set; 2221 return (0); 2222 } 2223 2224 /* 2225 * This one handles all set-related commands 2226 * ipfw set { show | enable | disable } 2227 * ipfw set swap X Y 2228 * ipfw set move X to Y 2229 * ipfw set move rule X to Y 2230 */ 2231 void 2232 ipfw_sets_handler(char *av[]) 2233 { 2234 uint32_t masks[2]; 2235 int i; 2236 uint8_t cmd, rulenum; 2237 ipfw_range_tlv rt; 2238 char *msg; 2239 size_t size; 2240 2241 av++; 2242 memset(&rt, 0, sizeof(rt)); 2243 2244 if (av[0] == NULL) 2245 errx(EX_USAGE, "set needs command"); 2246 if (_substrcmp(*av, "show") == 0) { 2247 struct format_opts fo; 2248 ipfw_cfg_lheader *cfg; 2249 2250 memset(&fo, 0, sizeof(fo)); 2251 if (ipfw_get_config(&co, &fo, &cfg, &size) != 0) 2252 err(EX_OSERR, "requesting config failed"); 2253 2254 for (i = 0, msg = "disable"; i < RESVD_SET; i++) 2255 if ((cfg->set_mask & (1<<i)) == 0) { 2256 printf("%s %d", msg, i); 2257 msg = ""; 2258 } 2259 msg = (cfg->set_mask != (uint32_t)-1) ? " enable" : "enable"; 2260 for (i = 0; i < RESVD_SET; i++) 2261 if ((cfg->set_mask & (1<<i)) != 0) { 2262 printf("%s %d", msg, i); 2263 msg = ""; 2264 } 2265 printf("\n"); 2266 free(cfg); 2267 } else if (_substrcmp(*av, "swap") == 0) { 2268 av++; 2269 if ( av[0] == NULL || av[1] == NULL ) 2270 errx(EX_USAGE, "set swap needs 2 set numbers\n"); 2271 rt.set = atoi(av[0]); 2272 rt.new_set = atoi(av[1]); 2273 if (!isdigit(*(av[0])) || rt.set > RESVD_SET) 2274 errx(EX_DATAERR, "invalid set number %s\n", av[0]); 2275 if (!isdigit(*(av[1])) || rt.new_set > RESVD_SET) 2276 errx(EX_DATAERR, "invalid set number %s\n", av[1]); 2277 i = do_range_cmd(IP_FW_SET_SWAP, &rt); 2278 } else if (_substrcmp(*av, "move") == 0) { 2279 av++; 2280 if (av[0] && _substrcmp(*av, "rule") == 0) { 2281 rt.flags = IPFW_RCFLAG_RANGE; /* move rules to new set */ 2282 cmd = IP_FW_XMOVE; 2283 av++; 2284 } else 2285 cmd = IP_FW_SET_MOVE; /* Move set to new one */ 2286 if (av[0] == NULL || av[1] == NULL || av[2] == NULL || 2287 av[3] != NULL || _substrcmp(av[1], "to") != 0) 2288 errx(EX_USAGE, "syntax: set move [rule] X to Y\n"); 2289 rulenum = atoi(av[0]); 2290 rt.new_set = atoi(av[2]); 2291 if (cmd == IP_FW_XMOVE) { 2292 rt.start_rule = rulenum; 2293 rt.end_rule = rulenum; 2294 } else 2295 rt.set = rulenum; 2296 rt.new_set = atoi(av[2]); 2297 if (!isdigit(*(av[0])) || (cmd == 3 && rt.set > RESVD_SET) || 2298 (cmd == 2 && rt.start_rule == IPFW_DEFAULT_RULE) ) 2299 errx(EX_DATAERR, "invalid source number %s\n", av[0]); 2300 if (!isdigit(*(av[2])) || rt.new_set > RESVD_SET) 2301 errx(EX_DATAERR, "invalid dest. set %s\n", av[1]); 2302 i = do_range_cmd(cmd, &rt); 2303 if (i < 0) 2304 err(EX_OSERR, "failed to move %s", 2305 cmd == IP_FW_SET_MOVE ? "set": "rule"); 2306 } else if (_substrcmp(*av, "disable") == 0 || 2307 _substrcmp(*av, "enable") == 0 ) { 2308 int which = _substrcmp(*av, "enable") == 0 ? 1 : 0; 2309 2310 av++; 2311 masks[0] = masks[1] = 0; 2312 2313 while (av[0]) { 2314 if (isdigit(**av)) { 2315 i = atoi(*av); 2316 if (i < 0 || i > RESVD_SET) 2317 errx(EX_DATAERR, 2318 "invalid set number %d\n", i); 2319 masks[which] |= (1<<i); 2320 } else if (_substrcmp(*av, "disable") == 0) 2321 which = 0; 2322 else if (_substrcmp(*av, "enable") == 0) 2323 which = 1; 2324 else 2325 errx(EX_DATAERR, 2326 "invalid set command %s\n", *av); 2327 av++; 2328 } 2329 if ( (masks[0] & masks[1]) != 0 ) 2330 errx(EX_DATAERR, 2331 "cannot enable and disable the same set\n"); 2332 2333 rt.set = masks[0]; 2334 rt.new_set = masks[1]; 2335 i = do_range_cmd(IP_FW_SET_ENABLE, &rt); 2336 if (i) 2337 warn("set enable/disable: setsockopt(IP_FW_SET_ENABLE)"); 2338 } else 2339 errx(EX_USAGE, "invalid set command %s\n", *av); 2340 } 2341 2342 void 2343 ipfw_sysctl_handler(char *av[], int which) 2344 { 2345 av++; 2346 2347 if (av[0] == NULL) { 2348 warnx("missing keyword to enable/disable\n"); 2349 } else if (_substrcmp(*av, "firewall") == 0) { 2350 sysctlbyname("net.inet.ip.fw.enable", NULL, 0, 2351 &which, sizeof(which)); 2352 sysctlbyname("net.inet6.ip6.fw.enable", NULL, 0, 2353 &which, sizeof(which)); 2354 } else if (_substrcmp(*av, "one_pass") == 0) { 2355 sysctlbyname("net.inet.ip.fw.one_pass", NULL, 0, 2356 &which, sizeof(which)); 2357 } else if (_substrcmp(*av, "debug") == 0) { 2358 sysctlbyname("net.inet.ip.fw.debug", NULL, 0, 2359 &which, sizeof(which)); 2360 } else if (_substrcmp(*av, "verbose") == 0) { 2361 sysctlbyname("net.inet.ip.fw.verbose", NULL, 0, 2362 &which, sizeof(which)); 2363 } else if (_substrcmp(*av, "dyn_keepalive") == 0) { 2364 sysctlbyname("net.inet.ip.fw.dyn_keepalive", NULL, 0, 2365 &which, sizeof(which)); 2366 #ifndef NO_ALTQ 2367 } else if (_substrcmp(*av, "altq") == 0) { 2368 altq_set_enabled(which); 2369 #endif 2370 } else { 2371 warnx("unrecognize enable/disable keyword: %s\n", *av); 2372 } 2373 } 2374 2375 typedef void state_cb(struct cmdline_opts *co, struct format_opts *fo, 2376 void *arg, void *state); 2377 2378 static void 2379 prepare_format_dyn(struct cmdline_opts *co, struct format_opts *fo, 2380 void *arg, void *_state) 2381 { 2382 ipfw_dyn_rule *d; 2383 int width; 2384 uint8_t set; 2385 2386 d = (ipfw_dyn_rule *)_state; 2387 /* Count _ALL_ states */ 2388 fo->dcnt++; 2389 2390 if (fo->show_counters == 0) 2391 return; 2392 2393 if (co->use_set) { 2394 /* skip states from another set */ 2395 bcopy((char *)&d->rule + sizeof(uint16_t), &set, 2396 sizeof(uint8_t)); 2397 if (set != co->use_set - 1) 2398 return; 2399 } 2400 2401 width = pr_u64(NULL, &d->pcnt, 0); 2402 if (width > fo->pcwidth) 2403 fo->pcwidth = width; 2404 2405 width = pr_u64(NULL, &d->bcnt, 0); 2406 if (width > fo->bcwidth) 2407 fo->bcwidth = width; 2408 } 2409 2410 static int 2411 foreach_state(struct cmdline_opts *co, struct format_opts *fo, 2412 caddr_t base, size_t sz, state_cb dyn_bc, void *dyn_arg) 2413 { 2414 int ttype; 2415 state_cb *fptr; 2416 void *farg; 2417 ipfw_obj_tlv *tlv; 2418 ipfw_obj_ctlv *ctlv; 2419 2420 fptr = NULL; 2421 ttype = 0; 2422 2423 while (sz > 0) { 2424 ctlv = (ipfw_obj_ctlv *)base; 2425 switch (ctlv->head.type) { 2426 case IPFW_TLV_DYNSTATE_LIST: 2427 base += sizeof(*ctlv); 2428 sz -= sizeof(*ctlv); 2429 ttype = IPFW_TLV_DYN_ENT; 2430 fptr = dyn_bc; 2431 farg = dyn_arg; 2432 break; 2433 default: 2434 return (sz); 2435 } 2436 2437 while (sz > 0) { 2438 tlv = (ipfw_obj_tlv *)base; 2439 if (tlv->type != ttype) 2440 break; 2441 2442 fptr(co, fo, farg, tlv + 1); 2443 sz -= tlv->length; 2444 base += tlv->length; 2445 } 2446 } 2447 2448 return (sz); 2449 } 2450 2451 static void 2452 prepare_format_opts(struct cmdline_opts *co, struct format_opts *fo, 2453 ipfw_obj_tlv *rtlv, int rcnt, caddr_t dynbase, size_t dynsz) 2454 { 2455 int bcwidth, pcwidth, width; 2456 int n; 2457 struct ip_fw_bcounter *cntr; 2458 struct ip_fw_rule *r; 2459 2460 bcwidth = 0; 2461 pcwidth = 0; 2462 if (fo->show_counters != 0) { 2463 for (n = 0; n < rcnt; n++, 2464 rtlv = (ipfw_obj_tlv *)((caddr_t)rtlv + rtlv->length)) { 2465 cntr = (struct ip_fw_bcounter *)(rtlv + 1); 2466 r = (struct ip_fw_rule *)((caddr_t)cntr + cntr->size); 2467 /* skip rules from another set */ 2468 if (co->use_set && r->set != co->use_set - 1) 2469 continue; 2470 2471 /* packet counter */ 2472 width = pr_u64(NULL, &cntr->pcnt, 0); 2473 if (width > pcwidth) 2474 pcwidth = width; 2475 2476 /* byte counter */ 2477 width = pr_u64(NULL, &cntr->bcnt, 0); 2478 if (width > bcwidth) 2479 bcwidth = width; 2480 } 2481 } 2482 fo->bcwidth = bcwidth; 2483 fo->pcwidth = pcwidth; 2484 2485 fo->dcnt = 0; 2486 if (co->do_dynamic && dynsz > 0) 2487 foreach_state(co, fo, dynbase, dynsz, prepare_format_dyn, NULL); 2488 } 2489 2490 static int 2491 list_static_range(struct cmdline_opts *co, struct format_opts *fo, 2492 struct buf_pr *bp, ipfw_obj_tlv *rtlv, int rcnt) 2493 { 2494 int n, seen; 2495 struct ip_fw_rule *r; 2496 struct ip_fw_bcounter *cntr; 2497 int c = 0; 2498 2499 for (n = seen = 0; n < rcnt; n++, 2500 rtlv = (ipfw_obj_tlv *)((caddr_t)rtlv + rtlv->length)) { 2501 2502 if ((fo->show_counters | fo->show_time) != 0) { 2503 cntr = (struct ip_fw_bcounter *)(rtlv + 1); 2504 r = (struct ip_fw_rule *)((caddr_t)cntr + cntr->size); 2505 } else { 2506 cntr = NULL; 2507 r = (struct ip_fw_rule *)(rtlv + 1); 2508 } 2509 if (r->rulenum > fo->last) 2510 break; 2511 if (co->use_set && r->set != co->use_set - 1) 2512 continue; 2513 if (r->rulenum >= fo->first && r->rulenum <= fo->last) { 2514 show_static_rule(co, fo, bp, r, cntr); 2515 printf("%s", bp->buf); 2516 c += rtlv->length; 2517 bp_flush(bp); 2518 seen++; 2519 } 2520 } 2521 2522 return (seen); 2523 } 2524 2525 static void 2526 list_dyn_state(struct cmdline_opts *co, struct format_opts *fo, 2527 void *_arg, void *_state) 2528 { 2529 uint16_t rulenum; 2530 uint8_t set; 2531 ipfw_dyn_rule *d; 2532 struct buf_pr *bp; 2533 2534 d = (ipfw_dyn_rule *)_state; 2535 bp = (struct buf_pr *)_arg; 2536 2537 bcopy(&d->rule, &rulenum, sizeof(rulenum)); 2538 if (rulenum > fo->last) 2539 return; 2540 if (co->use_set) { 2541 bcopy((char *)&d->rule + sizeof(uint16_t), 2542 &set, sizeof(uint8_t)); 2543 if (set != co->use_set - 1) 2544 return; 2545 } 2546 if (rulenum >= fo->first) { 2547 show_dyn_state(co, fo, bp, d); 2548 printf("%s\n", bp->buf); 2549 bp_flush(bp); 2550 } 2551 } 2552 2553 static int 2554 list_dyn_range(struct cmdline_opts *co, struct format_opts *fo, 2555 struct buf_pr *bp, caddr_t base, size_t sz) 2556 { 2557 2558 sz = foreach_state(co, fo, base, sz, list_dyn_state, bp); 2559 return (sz); 2560 } 2561 2562 void 2563 ipfw_list(int ac, char *av[], int show_counters) 2564 { 2565 ipfw_cfg_lheader *cfg; 2566 struct format_opts sfo; 2567 size_t sz; 2568 int error; 2569 int lac; 2570 char **lav; 2571 uint32_t rnum; 2572 char *endptr; 2573 2574 if (co.test_only) { 2575 fprintf(stderr, "Testing only, list disabled\n"); 2576 return; 2577 } 2578 if (co.do_pipe) { 2579 dummynet_list(ac, av, show_counters); 2580 return; 2581 } 2582 2583 ac--; 2584 av++; 2585 memset(&sfo, 0, sizeof(sfo)); 2586 2587 /* Determine rule range to request */ 2588 if (ac > 0) { 2589 for (lac = ac, lav = av; lac != 0; lac--) { 2590 rnum = strtoul(*lav++, &endptr, 10); 2591 if (sfo.first == 0 || rnum < sfo.first) 2592 sfo.first = rnum; 2593 2594 if (*endptr == '-') 2595 rnum = strtoul(endptr + 1, &endptr, 10); 2596 if (sfo.last == 0 || rnum > sfo.last) 2597 sfo.last = rnum; 2598 } 2599 } 2600 2601 /* get configuraion from kernel */ 2602 cfg = NULL; 2603 sfo.show_counters = show_counters; 2604 sfo.show_time = co.do_time; 2605 sfo.flags = IPFW_CFG_GET_STATIC; 2606 if (co.do_dynamic != 0) 2607 sfo.flags |= IPFW_CFG_GET_STATES; 2608 if ((sfo.show_counters | sfo.show_time) != 0) 2609 sfo.flags |= IPFW_CFG_GET_COUNTERS; 2610 if (ipfw_get_config(&co, &sfo, &cfg, &sz) != 0) 2611 err(EX_OSERR, "retrieving config failed"); 2612 2613 error = ipfw_show_config(&co, &sfo, cfg, sz, ac, av); 2614 2615 free(cfg); 2616 2617 if (error != EX_OK) 2618 exit(error); 2619 } 2620 2621 static int 2622 ipfw_show_config(struct cmdline_opts *co, struct format_opts *fo, 2623 ipfw_cfg_lheader *cfg, size_t sz, int ac, char *av[]) 2624 { 2625 caddr_t dynbase; 2626 size_t dynsz; 2627 int rcnt; 2628 int exitval = EX_OK; 2629 int lac; 2630 char **lav; 2631 char *endptr; 2632 size_t readsz; 2633 struct buf_pr bp; 2634 ipfw_obj_ctlv *ctlv, *tstate; 2635 ipfw_obj_tlv *rbase; 2636 2637 /* 2638 * Handle tablenames TLV first, if any 2639 */ 2640 tstate = NULL; 2641 rbase = NULL; 2642 dynbase = NULL; 2643 dynsz = 0; 2644 readsz = sizeof(*cfg); 2645 rcnt = 0; 2646 2647 fo->set_mask = cfg->set_mask; 2648 2649 ctlv = (ipfw_obj_ctlv *)(cfg + 1); 2650 2651 if (cfg->flags & IPFW_CFG_GET_STATIC) { 2652 /* We've requested static rules */ 2653 if (ctlv->head.type == IPFW_TLV_TBLNAME_LIST) { 2654 object_sort_ctlv(ctlv); 2655 fo->tstate = ctlv; 2656 readsz += ctlv->head.length; 2657 ctlv = (ipfw_obj_ctlv *)((caddr_t)ctlv + 2658 ctlv->head.length); 2659 } 2660 2661 if (ctlv->head.type == IPFW_TLV_RULE_LIST) { 2662 rbase = (ipfw_obj_tlv *)(ctlv + 1); 2663 rcnt = ctlv->count; 2664 readsz += ctlv->head.length; 2665 ctlv = (ipfw_obj_ctlv *)((caddr_t)ctlv + 2666 ctlv->head.length); 2667 } 2668 } 2669 2670 if ((cfg->flags & IPFW_CFG_GET_STATES) && (readsz != sz)) { 2671 /* We may have some dynamic states */ 2672 dynsz = sz - readsz; 2673 /* Skip empty header */ 2674 if (dynsz != sizeof(ipfw_obj_ctlv)) 2675 dynbase = (caddr_t)ctlv; 2676 else 2677 dynsz = 0; 2678 } 2679 2680 prepare_format_opts(co, fo, rbase, rcnt, dynbase, dynsz); 2681 bp_alloc(&bp, 4096); 2682 2683 /* if no rule numbers were specified, list all rules */ 2684 if (ac == 0) { 2685 fo->first = 0; 2686 fo->last = IPFW_DEFAULT_RULE; 2687 list_static_range(co, fo, &bp, rbase, rcnt); 2688 2689 if (co->do_dynamic && dynsz > 0) { 2690 printf("## Dynamic rules (%d %zu):\n", fo->dcnt, dynsz); 2691 list_dyn_range(co, fo, &bp, dynbase, dynsz); 2692 } 2693 2694 bp_free(&bp); 2695 return (EX_OK); 2696 } 2697 2698 /* display specific rules requested on command line */ 2699 for (lac = ac, lav = av; lac != 0; lac--) { 2700 /* convert command line rule # */ 2701 fo->last = fo->first = strtoul(*lav++, &endptr, 10); 2702 if (*endptr == '-') 2703 fo->last = strtoul(endptr + 1, &endptr, 10); 2704 if (*endptr) { 2705 exitval = EX_USAGE; 2706 warnx("invalid rule number: %s", *(lav - 1)); 2707 continue; 2708 } 2709 2710 if (list_static_range(co, fo, &bp, rbase, rcnt) == 0) { 2711 /* give precedence to other error(s) */ 2712 if (exitval == EX_OK) 2713 exitval = EX_UNAVAILABLE; 2714 if (fo->first == fo->last) 2715 warnx("rule %u does not exist", fo->first); 2716 else 2717 warnx("no rules in range %u-%u", 2718 fo->first, fo->last); 2719 } 2720 } 2721 2722 if (co->do_dynamic && dynsz > 0) { 2723 printf("## Dynamic rules:\n"); 2724 for (lac = ac, lav = av; lac != 0; lac--) { 2725 fo->last = fo->first = strtoul(*lav++, &endptr, 10); 2726 if (*endptr == '-') 2727 fo->last = strtoul(endptr+1, &endptr, 10); 2728 if (*endptr) 2729 /* already warned */ 2730 continue; 2731 list_dyn_range(co, fo, &bp, dynbase, dynsz); 2732 } 2733 } 2734 2735 bp_free(&bp); 2736 return (exitval); 2737 } 2738 2739 2740 /* 2741 * Retrieves current ipfw configuration of given type 2742 * and stores its pointer to @pcfg. 2743 * 2744 * Caller is responsible for freeing @pcfg. 2745 * 2746 * Returns 0 on success. 2747 */ 2748 2749 static int 2750 ipfw_get_config(struct cmdline_opts *co, struct format_opts *fo, 2751 ipfw_cfg_lheader **pcfg, size_t *psize) 2752 { 2753 ipfw_cfg_lheader *cfg; 2754 size_t sz; 2755 int i; 2756 2757 2758 if (co->test_only != 0) { 2759 fprintf(stderr, "Testing only, list disabled\n"); 2760 return (0); 2761 } 2762 2763 /* Start with some data size */ 2764 sz = 4096; 2765 cfg = NULL; 2766 2767 for (i = 0; i < 16; i++) { 2768 if (cfg != NULL) 2769 free(cfg); 2770 if ((cfg = calloc(1, sz)) == NULL) 2771 return (ENOMEM); 2772 2773 cfg->flags = fo->flags; 2774 cfg->start_rule = fo->first; 2775 cfg->end_rule = fo->last; 2776 2777 if (do_get3(IP_FW_XGET, &cfg->opheader, &sz) != 0) { 2778 if (errno != ENOMEM) { 2779 free(cfg); 2780 return (errno); 2781 } 2782 2783 /* Buffer size is not enough. Try to increase */ 2784 sz = sz * 2; 2785 if (sz < cfg->size) 2786 sz = cfg->size; 2787 continue; 2788 } 2789 2790 *pcfg = cfg; 2791 *psize = sz; 2792 return (0); 2793 } 2794 2795 free(cfg); 2796 return (ENOMEM); 2797 } 2798 2799 static int 2800 lookup_host (char *host, struct in_addr *ipaddr) 2801 { 2802 struct hostent *he; 2803 2804 if (!inet_aton(host, ipaddr)) { 2805 if ((he = gethostbyname(host)) == NULL) 2806 return(-1); 2807 *ipaddr = *(struct in_addr *)he->h_addr_list[0]; 2808 } 2809 return(0); 2810 } 2811 2812 struct tidx { 2813 ipfw_obj_ntlv *idx; 2814 uint32_t count; 2815 uint32_t size; 2816 uint16_t counter; 2817 uint8_t set; 2818 }; 2819 2820 int 2821 ipfw_check_object_name(const char *name) 2822 { 2823 int c, i, l; 2824 2825 /* 2826 * Check that name is null-terminated and contains 2827 * valid symbols only. Valid mask is: 2828 * [a-zA-Z0-9\-_\.]{1,63} 2829 */ 2830 l = strlen(name); 2831 if (l == 0 || l >= 64) 2832 return (EINVAL); 2833 for (i = 0; i < l; i++) { 2834 c = name[i]; 2835 if (isalpha(c) || isdigit(c) || c == '_' || 2836 c == '-' || c == '.') 2837 continue; 2838 return (EINVAL); 2839 } 2840 return (0); 2841 } 2842 2843 static char *default_state_name = "default"; 2844 static int 2845 state_check_name(const char *name) 2846 { 2847 2848 if (ipfw_check_object_name(name) != 0) 2849 return (EINVAL); 2850 if (strcmp(name, "any") == 0) 2851 return (EINVAL); 2852 return (0); 2853 } 2854 2855 static int 2856 eaction_check_name(const char *name) 2857 { 2858 2859 if (ipfw_check_object_name(name) != 0) 2860 return (EINVAL); 2861 /* Restrict some 'special' names */ 2862 if (match_token(rule_actions, name) != -1 && 2863 match_token(rule_action_params, name) != -1) 2864 return (EINVAL); 2865 return (0); 2866 } 2867 2868 static uint16_t 2869 pack_object(struct tidx *tstate, char *name, int otype) 2870 { 2871 int i; 2872 ipfw_obj_ntlv *ntlv; 2873 2874 for (i = 0; i < tstate->count; i++) { 2875 if (strcmp(tstate->idx[i].name, name) != 0) 2876 continue; 2877 if (tstate->idx[i].set != tstate->set) 2878 continue; 2879 if (tstate->idx[i].head.type != otype) 2880 continue; 2881 2882 return (tstate->idx[i].idx); 2883 } 2884 2885 if (tstate->count + 1 > tstate->size) { 2886 tstate->size += 4; 2887 tstate->idx = realloc(tstate->idx, tstate->size * 2888 sizeof(ipfw_obj_ntlv)); 2889 if (tstate->idx == NULL) 2890 return (0); 2891 } 2892 2893 ntlv = &tstate->idx[i]; 2894 memset(ntlv, 0, sizeof(ipfw_obj_ntlv)); 2895 strlcpy(ntlv->name, name, sizeof(ntlv->name)); 2896 ntlv->head.type = otype; 2897 ntlv->head.length = sizeof(ipfw_obj_ntlv); 2898 ntlv->set = tstate->set; 2899 ntlv->idx = ++tstate->counter; 2900 tstate->count++; 2901 2902 return (ntlv->idx); 2903 } 2904 2905 static uint16_t 2906 pack_table(struct tidx *tstate, char *name) 2907 { 2908 2909 if (table_check_name(name) != 0) 2910 return (0); 2911 2912 return (pack_object(tstate, name, IPFW_TLV_TBL_NAME)); 2913 } 2914 2915 void 2916 fill_table(struct _ipfw_insn *cmd, char *av, uint8_t opcode, 2917 struct tidx *tstate) 2918 { 2919 uint32_t *d = ((ipfw_insn_u32 *)cmd)->d; 2920 uint16_t uidx; 2921 char *p; 2922 2923 if ((p = strchr(av + 6, ')')) == NULL) 2924 errx(EX_DATAERR, "forgotten parenthesis: '%s'", av); 2925 *p = '\0'; 2926 p = strchr(av + 6, ','); 2927 if (p) 2928 *p++ = '\0'; 2929 2930 if ((uidx = pack_table(tstate, av + 6)) == 0) 2931 errx(EX_DATAERR, "Invalid table name: %s", av + 6); 2932 2933 cmd->opcode = opcode; 2934 cmd->arg1 = uidx; 2935 if (p) { 2936 cmd->len |= F_INSN_SIZE(ipfw_insn_u32); 2937 d[0] = strtoul(p, NULL, 0); 2938 } else 2939 cmd->len |= F_INSN_SIZE(ipfw_insn); 2940 } 2941 2942 2943 /* 2944 * fills the addr and mask fields in the instruction as appropriate from av. 2945 * Update length as appropriate. 2946 * The following formats are allowed: 2947 * me returns O_IP_*_ME 2948 * 1.2.3.4 single IP address 2949 * 1.2.3.4:5.6.7.8 address:mask 2950 * 1.2.3.4/24 address/mask 2951 * 1.2.3.4/26{1,6,5,4,23} set of addresses in a subnet 2952 * We can have multiple comma-separated address/mask entries. 2953 */ 2954 static void 2955 fill_ip(ipfw_insn_ip *cmd, char *av, int cblen, struct tidx *tstate) 2956 { 2957 int len = 0; 2958 uint32_t *d = ((ipfw_insn_u32 *)cmd)->d; 2959 2960 cmd->o.len &= ~F_LEN_MASK; /* zero len */ 2961 2962 if (_substrcmp(av, "any") == 0) 2963 return; 2964 2965 if (_substrcmp(av, "me") == 0) { 2966 cmd->o.len |= F_INSN_SIZE(ipfw_insn); 2967 return; 2968 } 2969 2970 if (strncmp(av, "table(", 6) == 0) { 2971 fill_table(&cmd->o, av, O_IP_DST_LOOKUP, tstate); 2972 return; 2973 } 2974 2975 while (av) { 2976 /* 2977 * After the address we can have '/' or ':' indicating a mask, 2978 * ',' indicating another address follows, '{' indicating a 2979 * set of addresses of unspecified size. 2980 */ 2981 char *t = NULL, *p = strpbrk(av, "/:,{"); 2982 int masklen; 2983 char md, nd = '\0'; 2984 2985 CHECK_LENGTH(cblen, F_INSN_SIZE(ipfw_insn) + 2 + len); 2986 2987 if (p) { 2988 md = *p; 2989 *p++ = '\0'; 2990 if ((t = strpbrk(p, ",{")) != NULL) { 2991 nd = *t; 2992 *t = '\0'; 2993 } 2994 } else 2995 md = '\0'; 2996 2997 if (lookup_host(av, (struct in_addr *)&d[0]) != 0) 2998 errx(EX_NOHOST, "hostname ``%s'' unknown", av); 2999 switch (md) { 3000 case ':': 3001 if (!inet_aton(p, (struct in_addr *)&d[1])) 3002 errx(EX_DATAERR, "bad netmask ``%s''", p); 3003 break; 3004 case '/': 3005 masklen = atoi(p); 3006 if (masklen == 0) 3007 d[1] = htonl(0U); /* mask */ 3008 else if (masklen > 32) 3009 errx(EX_DATAERR, "bad width ``%s''", p); 3010 else 3011 d[1] = htonl(~0U << (32 - masklen)); 3012 break; 3013 case '{': /* no mask, assume /24 and put back the '{' */ 3014 d[1] = htonl(~0U << (32 - 24)); 3015 *(--p) = md; 3016 break; 3017 3018 case ',': /* single address plus continuation */ 3019 *(--p) = md; 3020 /* FALLTHROUGH */ 3021 case 0: /* initialization value */ 3022 default: 3023 d[1] = htonl(~0U); /* force /32 */ 3024 break; 3025 } 3026 d[0] &= d[1]; /* mask base address with mask */ 3027 if (t) 3028 *t = nd; 3029 /* find next separator */ 3030 if (p) 3031 p = strpbrk(p, ",{"); 3032 if (p && *p == '{') { 3033 /* 3034 * We have a set of addresses. They are stored as follows: 3035 * arg1 is the set size (powers of 2, 2..256) 3036 * addr is the base address IN HOST FORMAT 3037 * mask.. is an array of arg1 bits (rounded up to 3038 * the next multiple of 32) with bits set 3039 * for each host in the map. 3040 */ 3041 uint32_t *map = (uint32_t *)&cmd->mask; 3042 int low, high; 3043 int i = contigmask((uint8_t *)&(d[1]), 32); 3044 3045 if (len > 0) 3046 errx(EX_DATAERR, "address set cannot be in a list"); 3047 if (i < 24 || i > 31) 3048 errx(EX_DATAERR, "invalid set with mask %d\n", i); 3049 cmd->o.arg1 = 1<<(32-i); /* map length */ 3050 d[0] = ntohl(d[0]); /* base addr in host format */ 3051 cmd->o.opcode = O_IP_DST_SET; /* default */ 3052 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32) + (cmd->o.arg1+31)/32; 3053 for (i = 0; i < (cmd->o.arg1+31)/32 ; i++) 3054 map[i] = 0; /* clear map */ 3055 3056 av = p + 1; 3057 low = d[0] & 0xff; 3058 high = low + cmd->o.arg1 - 1; 3059 /* 3060 * Here, i stores the previous value when we specify a range 3061 * of addresses within a mask, e.g. 45-63. i = -1 means we 3062 * have no previous value. 3063 */ 3064 i = -1; /* previous value in a range */ 3065 while (isdigit(*av)) { 3066 char *s; 3067 int a = strtol(av, &s, 0); 3068 3069 if (s == av) { /* no parameter */ 3070 if (*av != '}') 3071 errx(EX_DATAERR, "set not closed\n"); 3072 if (i != -1) 3073 errx(EX_DATAERR, "incomplete range %d-", i); 3074 break; 3075 } 3076 if (a < low || a > high) 3077 errx(EX_DATAERR, "addr %d out of range [%d-%d]\n", 3078 a, low, high); 3079 a -= low; 3080 if (i == -1) /* no previous in range */ 3081 i = a; 3082 else { /* check that range is valid */ 3083 if (i > a) 3084 errx(EX_DATAERR, "invalid range %d-%d", 3085 i+low, a+low); 3086 if (*s == '-') 3087 errx(EX_DATAERR, "double '-' in range"); 3088 } 3089 for (; i <= a; i++) 3090 map[i/32] |= 1<<(i & 31); 3091 i = -1; 3092 if (*s == '-') 3093 i = a; 3094 else if (*s == '}') 3095 break; 3096 av = s+1; 3097 } 3098 return; 3099 } 3100 av = p; 3101 if (av) /* then *av must be a ',' */ 3102 av++; 3103 3104 /* Check this entry */ 3105 if (d[1] == 0) { /* "any", specified as x.x.x.x/0 */ 3106 /* 3107 * 'any' turns the entire list into a NOP. 3108 * 'not any' never matches, so it is removed from the 3109 * list unless it is the only item, in which case we 3110 * report an error. 3111 */ 3112 if (cmd->o.len & F_NOT) { /* "not any" never matches */ 3113 if (av == NULL && len == 0) /* only this entry */ 3114 errx(EX_DATAERR, "not any never matches"); 3115 } 3116 /* else do nothing and skip this entry */ 3117 return; 3118 } 3119 /* A single IP can be stored in an optimized format */ 3120 if (d[1] == (uint32_t)~0 && av == NULL && len == 0) { 3121 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32); 3122 return; 3123 } 3124 len += 2; /* two words... */ 3125 d += 2; 3126 } /* end while */ 3127 if (len + 1 > F_LEN_MASK) 3128 errx(EX_DATAERR, "address list too long"); 3129 cmd->o.len |= len+1; 3130 } 3131 3132 3133 /* n2mask sets n bits of the mask */ 3134 void 3135 n2mask(struct in6_addr *mask, int n) 3136 { 3137 static int minimask[9] = 3138 { 0x00, 0x80, 0xc0, 0xe0, 0xf0, 0xf8, 0xfc, 0xfe, 0xff }; 3139 u_char *p; 3140 3141 memset(mask, 0, sizeof(struct in6_addr)); 3142 p = (u_char *) mask; 3143 for (; n > 0; p++, n -= 8) { 3144 if (n >= 8) 3145 *p = 0xff; 3146 else 3147 *p = minimask[n]; 3148 } 3149 return; 3150 } 3151 3152 static void 3153 fill_flags_cmd(ipfw_insn *cmd, enum ipfw_opcodes opcode, 3154 struct _s_x *flags, char *p) 3155 { 3156 char *e; 3157 uint32_t set = 0, clear = 0; 3158 3159 if (fill_flags(flags, p, &e, &set, &clear) != 0) 3160 errx(EX_DATAERR, "invalid flag %s", e); 3161 3162 cmd->opcode = opcode; 3163 cmd->len = (cmd->len & (F_NOT | F_OR)) | 1; 3164 cmd->arg1 = (set & 0xff) | ( (clear & 0xff) << 8); 3165 } 3166 3167 3168 void 3169 ipfw_delete(char *av[]) 3170 { 3171 int i, j; 3172 int exitval = EX_OK; 3173 int do_set = 0; 3174 char *sep; 3175 ipfw_range_tlv rt; 3176 3177 av++; 3178 NEED1("missing rule specification"); 3179 memset(&rt, 0, sizeof(rt)); 3180 if ( *av && _substrcmp(*av, "set") == 0) { 3181 /* Do not allow using the following syntax: 3182 * ipfw set N delete set M 3183 */ 3184 if (co.use_set) 3185 errx(EX_DATAERR, "invalid syntax"); 3186 do_set = 1; /* delete set */ 3187 av++; 3188 } 3189 3190 /* Rule number */ 3191 while (*av && isdigit(**av)) { 3192 i = strtol(*av, &sep, 10); 3193 j = i; 3194 if (*sep== '-') 3195 j = strtol(sep + 1, NULL, 10); 3196 av++; 3197 if (co.do_nat) { 3198 exitval = do_cmd(IP_FW_NAT_DEL, &i, sizeof i); 3199 if (exitval) { 3200 exitval = EX_UNAVAILABLE; 3201 warn("rule %u not available", i); 3202 } 3203 } else if (co.do_pipe) { 3204 exitval = ipfw_delete_pipe(co.do_pipe, i); 3205 } else { 3206 if (do_set != 0) { 3207 rt.set = i & 31; 3208 rt.flags = IPFW_RCFLAG_SET; 3209 } else { 3210 rt.start_rule = i & 0xffff; 3211 rt.end_rule = j & 0xffff; 3212 if (rt.start_rule == 0 && rt.end_rule == 0) 3213 rt.flags |= IPFW_RCFLAG_ALL; 3214 else 3215 rt.flags |= IPFW_RCFLAG_RANGE; 3216 if (co.use_set != 0) { 3217 rt.set = co.use_set - 1; 3218 rt.flags |= IPFW_RCFLAG_SET; 3219 } 3220 } 3221 i = do_range_cmd(IP_FW_XDEL, &rt); 3222 if (i != 0) { 3223 exitval = EX_UNAVAILABLE; 3224 warn("rule %u: setsockopt(IP_FW_XDEL)", 3225 rt.start_rule); 3226 } else if (rt.new_set == 0 && do_set == 0) { 3227 exitval = EX_UNAVAILABLE; 3228 if (rt.start_rule != rt.end_rule) 3229 warnx("no rules rules in %u-%u range", 3230 rt.start_rule, rt.end_rule); 3231 else 3232 warnx("rule %u not found", 3233 rt.start_rule); 3234 } 3235 } 3236 } 3237 if (exitval != EX_OK) 3238 exit(exitval); 3239 } 3240 3241 3242 /* 3243 * fill the interface structure. We do not check the name as we can 3244 * create interfaces dynamically, so checking them at insert time 3245 * makes relatively little sense. 3246 * Interface names containing '*', '?', or '[' are assumed to be shell 3247 * patterns which match interfaces. 3248 */ 3249 static void 3250 fill_iface(ipfw_insn_if *cmd, char *arg, int cblen, struct tidx *tstate) 3251 { 3252 char *p; 3253 uint16_t uidx; 3254 3255 cmd->name[0] = '\0'; 3256 cmd->o.len |= F_INSN_SIZE(ipfw_insn_if); 3257 3258 CHECK_CMDLEN; 3259 3260 /* Parse the interface or address */ 3261 if (strcmp(arg, "any") == 0) 3262 cmd->o.len = 0; /* effectively ignore this command */ 3263 else if (strncmp(arg, "table(", 6) == 0) { 3264 if ((p = strchr(arg + 6, ')')) == NULL) 3265 errx(EX_DATAERR, "forgotten parenthesis: '%s'", arg); 3266 *p = '\0'; 3267 p = strchr(arg + 6, ','); 3268 if (p) 3269 *p++ = '\0'; 3270 if ((uidx = pack_table(tstate, arg + 6)) == 0) 3271 errx(EX_DATAERR, "Invalid table name: %s", arg + 6); 3272 3273 cmd->name[0] = '\1'; /* Special value indicating table */ 3274 cmd->p.kidx = uidx; 3275 } else if (!isdigit(*arg)) { 3276 strlcpy(cmd->name, arg, sizeof(cmd->name)); 3277 cmd->p.glob = strpbrk(arg, "*?[") != NULL ? 1 : 0; 3278 } else if (!inet_aton(arg, &cmd->p.ip)) 3279 errx(EX_DATAERR, "bad ip address ``%s''", arg); 3280 } 3281 3282 static void 3283 get_mac_addr_mask(const char *p, uint8_t *addr, uint8_t *mask) 3284 { 3285 int i; 3286 size_t l; 3287 char *ap, *ptr, *optr; 3288 struct ether_addr *mac; 3289 const char *macset = "0123456789abcdefABCDEF:"; 3290 3291 if (strcmp(p, "any") == 0) { 3292 for (i = 0; i < ETHER_ADDR_LEN; i++) 3293 addr[i] = mask[i] = 0; 3294 return; 3295 } 3296 3297 optr = ptr = strdup(p); 3298 if ((ap = strsep(&ptr, "&/")) != NULL && *ap != 0) { 3299 l = strlen(ap); 3300 if (strspn(ap, macset) != l || (mac = ether_aton(ap)) == NULL) 3301 errx(EX_DATAERR, "Incorrect MAC address"); 3302 bcopy(mac, addr, ETHER_ADDR_LEN); 3303 } else 3304 errx(EX_DATAERR, "Incorrect MAC address"); 3305 3306 if (ptr != NULL) { /* we have mask? */ 3307 if (p[ptr - optr - 1] == '/') { /* mask len */ 3308 long ml = strtol(ptr, &ap, 10); 3309 if (*ap != 0 || ml > ETHER_ADDR_LEN * 8 || ml < 0) 3310 errx(EX_DATAERR, "Incorrect mask length"); 3311 for (i = 0; ml > 0 && i < ETHER_ADDR_LEN; ml -= 8, i++) 3312 mask[i] = (ml >= 8) ? 0xff: (~0) << (8 - ml); 3313 } else { /* mask */ 3314 l = strlen(ptr); 3315 if (strspn(ptr, macset) != l || 3316 (mac = ether_aton(ptr)) == NULL) 3317 errx(EX_DATAERR, "Incorrect mask"); 3318 bcopy(mac, mask, ETHER_ADDR_LEN); 3319 } 3320 } else { /* default mask: ff:ff:ff:ff:ff:ff */ 3321 for (i = 0; i < ETHER_ADDR_LEN; i++) 3322 mask[i] = 0xff; 3323 } 3324 for (i = 0; i < ETHER_ADDR_LEN; i++) 3325 addr[i] &= mask[i]; 3326 3327 free(optr); 3328 } 3329 3330 /* 3331 * helper function, updates the pointer to cmd with the length 3332 * of the current command, and also cleans up the first word of 3333 * the new command in case it has been clobbered before. 3334 */ 3335 static ipfw_insn * 3336 next_cmd(ipfw_insn *cmd, int *len) 3337 { 3338 *len -= F_LEN(cmd); 3339 CHECK_LENGTH(*len, 0); 3340 cmd += F_LEN(cmd); 3341 bzero(cmd, sizeof(*cmd)); 3342 return cmd; 3343 } 3344 3345 /* 3346 * Takes arguments and copies them into a comment 3347 */ 3348 static void 3349 fill_comment(ipfw_insn *cmd, char **av, int cblen) 3350 { 3351 int i, l; 3352 char *p = (char *)(cmd + 1); 3353 3354 cmd->opcode = O_NOP; 3355 cmd->len = (cmd->len & (F_NOT | F_OR)); 3356 3357 /* Compute length of comment string. */ 3358 for (i = 0, l = 0; av[i] != NULL; i++) 3359 l += strlen(av[i]) + 1; 3360 if (l == 0) 3361 return; 3362 if (l > 84) 3363 errx(EX_DATAERR, 3364 "comment too long (max 80 chars)"); 3365 l = 1 + (l+3)/4; 3366 cmd->len = (cmd->len & (F_NOT | F_OR)) | l; 3367 CHECK_CMDLEN; 3368 3369 for (i = 0; av[i] != NULL; i++) { 3370 strcpy(p, av[i]); 3371 p += strlen(av[i]); 3372 *p++ = ' '; 3373 } 3374 *(--p) = '\0'; 3375 } 3376 3377 /* 3378 * A function to fill simple commands of size 1. 3379 * Existing flags are preserved. 3380 */ 3381 static void 3382 fill_cmd(ipfw_insn *cmd, enum ipfw_opcodes opcode, int flags, uint16_t arg) 3383 { 3384 cmd->opcode = opcode; 3385 cmd->len = ((cmd->len | flags) & (F_NOT | F_OR)) | 1; 3386 cmd->arg1 = arg; 3387 } 3388 3389 /* 3390 * Fetch and add the MAC address and type, with masks. This generates one or 3391 * two microinstructions, and returns the pointer to the last one. 3392 */ 3393 static ipfw_insn * 3394 add_mac(ipfw_insn *cmd, char *av[], int cblen) 3395 { 3396 ipfw_insn_mac *mac; 3397 3398 if ( ( av[0] == NULL ) || ( av[1] == NULL ) ) 3399 errx(EX_DATAERR, "MAC dst src"); 3400 3401 cmd->opcode = O_MACADDR2; 3402 cmd->len = (cmd->len & (F_NOT | F_OR)) | F_INSN_SIZE(ipfw_insn_mac); 3403 CHECK_CMDLEN; 3404 3405 mac = (ipfw_insn_mac *)cmd; 3406 get_mac_addr_mask(av[0], mac->addr, mac->mask); /* dst */ 3407 get_mac_addr_mask(av[1], &(mac->addr[ETHER_ADDR_LEN]), 3408 &(mac->mask[ETHER_ADDR_LEN])); /* src */ 3409 return cmd; 3410 } 3411 3412 static ipfw_insn * 3413 add_mactype(ipfw_insn *cmd, char *av, int cblen) 3414 { 3415 if (!av) 3416 errx(EX_DATAERR, "missing MAC type"); 3417 if (strcmp(av, "any") != 0) { /* we have a non-null type */ 3418 fill_newports((ipfw_insn_u16 *)cmd, av, IPPROTO_ETHERTYPE, 3419 cblen); 3420 cmd->opcode = O_MAC_TYPE; 3421 return cmd; 3422 } else 3423 return NULL; 3424 } 3425 3426 static ipfw_insn * 3427 add_proto0(ipfw_insn *cmd, char *av, u_char *protop) 3428 { 3429 struct protoent *pe; 3430 char *ep; 3431 int proto; 3432 3433 proto = strtol(av, &ep, 10); 3434 if (*ep != '\0' || proto <= 0) { 3435 if ((pe = getprotobyname(av)) == NULL) 3436 return NULL; 3437 proto = pe->p_proto; 3438 } 3439 3440 fill_cmd(cmd, O_PROTO, 0, proto); 3441 *protop = proto; 3442 return cmd; 3443 } 3444 3445 static ipfw_insn * 3446 add_proto(ipfw_insn *cmd, char *av, u_char *protop) 3447 { 3448 u_char proto = IPPROTO_IP; 3449 3450 if (_substrcmp(av, "all") == 0 || strcmp(av, "ip") == 0) 3451 ; /* do not set O_IP4 nor O_IP6 */ 3452 else if (strcmp(av, "ip4") == 0) 3453 /* explicit "just IPv4" rule */ 3454 fill_cmd(cmd, O_IP4, 0, 0); 3455 else if (strcmp(av, "ip6") == 0) { 3456 /* explicit "just IPv6" rule */ 3457 proto = IPPROTO_IPV6; 3458 fill_cmd(cmd, O_IP6, 0, 0); 3459 } else 3460 return add_proto0(cmd, av, protop); 3461 3462 *protop = proto; 3463 return cmd; 3464 } 3465 3466 static ipfw_insn * 3467 add_proto_compat(ipfw_insn *cmd, char *av, u_char *protop) 3468 { 3469 u_char proto = IPPROTO_IP; 3470 3471 if (_substrcmp(av, "all") == 0 || strcmp(av, "ip") == 0) 3472 ; /* do not set O_IP4 nor O_IP6 */ 3473 else if (strcmp(av, "ipv4") == 0 || strcmp(av, "ip4") == 0) 3474 /* explicit "just IPv4" rule */ 3475 fill_cmd(cmd, O_IP4, 0, 0); 3476 else if (strcmp(av, "ipv6") == 0 || strcmp(av, "ip6") == 0) { 3477 /* explicit "just IPv6" rule */ 3478 proto = IPPROTO_IPV6; 3479 fill_cmd(cmd, O_IP6, 0, 0); 3480 } else 3481 return add_proto0(cmd, av, protop); 3482 3483 *protop = proto; 3484 return cmd; 3485 } 3486 3487 static ipfw_insn * 3488 add_srcip(ipfw_insn *cmd, char *av, int cblen, struct tidx *tstate) 3489 { 3490 fill_ip((ipfw_insn_ip *)cmd, av, cblen, tstate); 3491 if (cmd->opcode == O_IP_DST_SET) /* set */ 3492 cmd->opcode = O_IP_SRC_SET; 3493 else if (cmd->opcode == O_IP_DST_LOOKUP) /* table */ 3494 cmd->opcode = O_IP_SRC_LOOKUP; 3495 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn)) /* me */ 3496 cmd->opcode = O_IP_SRC_ME; 3497 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_u32)) /* one IP */ 3498 cmd->opcode = O_IP_SRC; 3499 else /* addr/mask */ 3500 cmd->opcode = O_IP_SRC_MASK; 3501 return cmd; 3502 } 3503 3504 static ipfw_insn * 3505 add_dstip(ipfw_insn *cmd, char *av, int cblen, struct tidx *tstate) 3506 { 3507 fill_ip((ipfw_insn_ip *)cmd, av, cblen, tstate); 3508 if (cmd->opcode == O_IP_DST_SET) /* set */ 3509 ; 3510 else if (cmd->opcode == O_IP_DST_LOOKUP) /* table */ 3511 ; 3512 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn)) /* me */ 3513 cmd->opcode = O_IP_DST_ME; 3514 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_u32)) /* one IP */ 3515 cmd->opcode = O_IP_DST; 3516 else /* addr/mask */ 3517 cmd->opcode = O_IP_DST_MASK; 3518 return cmd; 3519 } 3520 3521 static struct _s_x f_reserved_keywords[] = { 3522 { "altq", TOK_OR }, 3523 { "//", TOK_OR }, 3524 { "diverted", TOK_OR }, 3525 { "dst-port", TOK_OR }, 3526 { "src-port", TOK_OR }, 3527 { "established", TOK_OR }, 3528 { "keep-state", TOK_OR }, 3529 { "frag", TOK_OR }, 3530 { "icmptypes", TOK_OR }, 3531 { "in", TOK_OR }, 3532 { "out", TOK_OR }, 3533 { "ip6", TOK_OR }, 3534 { "any", TOK_OR }, 3535 { "to", TOK_OR }, 3536 { "via", TOK_OR }, 3537 { "{", TOK_OR }, 3538 { NULL, 0 } /* terminator */ 3539 }; 3540 3541 static ipfw_insn * 3542 add_ports(ipfw_insn *cmd, char *av, u_char proto, int opcode, int cblen) 3543 { 3544 3545 if (match_token(f_reserved_keywords, av) != -1) 3546 return (NULL); 3547 3548 if (fill_newports((ipfw_insn_u16 *)cmd, av, proto, cblen)) { 3549 /* XXX todo: check that we have a protocol with ports */ 3550 cmd->opcode = opcode; 3551 return cmd; 3552 } 3553 return NULL; 3554 } 3555 3556 static ipfw_insn * 3557 add_src(ipfw_insn *cmd, char *av, u_char proto, int cblen, struct tidx *tstate) 3558 { 3559 struct in6_addr a; 3560 char *host, *ch, buf[INET6_ADDRSTRLEN]; 3561 ipfw_insn *ret = NULL; 3562 int len; 3563 3564 /* Copy first address in set if needed */ 3565 if ((ch = strpbrk(av, "/,")) != NULL) { 3566 len = ch - av; 3567 strlcpy(buf, av, sizeof(buf)); 3568 if (len < sizeof(buf)) 3569 buf[len] = '\0'; 3570 host = buf; 3571 } else 3572 host = av; 3573 3574 if (proto == IPPROTO_IPV6 || strcmp(av, "me6") == 0 || 3575 inet_pton(AF_INET6, host, &a) == 1) 3576 ret = add_srcip6(cmd, av, cblen, tstate); 3577 /* XXX: should check for IPv4, not !IPv6 */ 3578 if (ret == NULL && (proto == IPPROTO_IP || strcmp(av, "me") == 0 || 3579 inet_pton(AF_INET6, host, &a) != 1)) 3580 ret = add_srcip(cmd, av, cblen, tstate); 3581 if (ret == NULL && strcmp(av, "any") != 0) 3582 ret = cmd; 3583 3584 return ret; 3585 } 3586 3587 static ipfw_insn * 3588 add_dst(ipfw_insn *cmd, char *av, u_char proto, int cblen, struct tidx *tstate) 3589 { 3590 struct in6_addr a; 3591 char *host, *ch, buf[INET6_ADDRSTRLEN]; 3592 ipfw_insn *ret = NULL; 3593 int len; 3594 3595 /* Copy first address in set if needed */ 3596 if ((ch = strpbrk(av, "/,")) != NULL) { 3597 len = ch - av; 3598 strlcpy(buf, av, sizeof(buf)); 3599 if (len < sizeof(buf)) 3600 buf[len] = '\0'; 3601 host = buf; 3602 } else 3603 host = av; 3604 3605 if (proto == IPPROTO_IPV6 || strcmp(av, "me6") == 0 || 3606 inet_pton(AF_INET6, host, &a) == 1) 3607 ret = add_dstip6(cmd, av, cblen, tstate); 3608 /* XXX: should check for IPv4, not !IPv6 */ 3609 if (ret == NULL && (proto == IPPROTO_IP || strcmp(av, "me") == 0 || 3610 inet_pton(AF_INET6, host, &a) != 1)) 3611 ret = add_dstip(cmd, av, cblen, tstate); 3612 if (ret == NULL && strcmp(av, "any") != 0) 3613 ret = cmd; 3614 3615 return ret; 3616 } 3617 3618 /* 3619 * Parse arguments and assemble the microinstructions which make up a rule. 3620 * Rules are added into the 'rulebuf' and then copied in the correct order 3621 * into the actual rule. 3622 * 3623 * The syntax for a rule starts with the action, followed by 3624 * optional action parameters, and the various match patterns. 3625 * In the assembled microcode, the first opcode must be an O_PROBE_STATE 3626 * (generated if the rule includes a keep-state option), then the 3627 * various match patterns, log/altq actions, and the actual action. 3628 * 3629 */ 3630 void 3631 compile_rule(char *av[], uint32_t *rbuf, int *rbufsize, struct tidx *tstate) 3632 { 3633 /* 3634 * rules are added into the 'rulebuf' and then copied in 3635 * the correct order into the actual rule. 3636 * Some things that need to go out of order (prob, action etc.) 3637 * go into actbuf[]. 3638 */ 3639 static uint32_t actbuf[255], cmdbuf[255]; 3640 int rblen, ablen, cblen; 3641 3642 ipfw_insn *src, *dst, *cmd, *action, *prev=NULL; 3643 ipfw_insn *first_cmd; /* first match pattern */ 3644 3645 struct ip_fw_rule *rule; 3646 3647 /* 3648 * various flags used to record that we entered some fields. 3649 */ 3650 ipfw_insn *have_state = NULL; /* check-state or keep-state */ 3651 ipfw_insn *have_log = NULL, *have_altq = NULL, *have_tag = NULL; 3652 size_t len; 3653 3654 int i; 3655 3656 int open_par = 0; /* open parenthesis ( */ 3657 3658 /* proto is here because it is used to fetch ports */ 3659 u_char proto = IPPROTO_IP; /* default protocol */ 3660 3661 double match_prob = 1; /* match probability, default is always match */ 3662 3663 bzero(actbuf, sizeof(actbuf)); /* actions go here */ 3664 bzero(cmdbuf, sizeof(cmdbuf)); 3665 bzero(rbuf, *rbufsize); 3666 3667 rule = (struct ip_fw_rule *)rbuf; 3668 cmd = (ipfw_insn *)cmdbuf; 3669 action = (ipfw_insn *)actbuf; 3670 3671 rblen = *rbufsize / sizeof(uint32_t); 3672 rblen -= sizeof(struct ip_fw_rule) / sizeof(uint32_t); 3673 ablen = sizeof(actbuf) / sizeof(actbuf[0]); 3674 cblen = sizeof(cmdbuf) / sizeof(cmdbuf[0]); 3675 cblen -= F_INSN_SIZE(ipfw_insn_u32) + 1; 3676 3677 #define CHECK_RBUFLEN(len) { CHECK_LENGTH(rblen, len); rblen -= len; } 3678 #define CHECK_ACTLEN CHECK_LENGTH(ablen, action->len) 3679 3680 av++; 3681 3682 /* [rule N] -- Rule number optional */ 3683 if (av[0] && isdigit(**av)) { 3684 rule->rulenum = atoi(*av); 3685 av++; 3686 } 3687 3688 /* [set N] -- set number (0..RESVD_SET), optional */ 3689 if (av[0] && av[1] && _substrcmp(*av, "set") == 0) { 3690 int set = strtoul(av[1], NULL, 10); 3691 if (set < 0 || set > RESVD_SET) 3692 errx(EX_DATAERR, "illegal set %s", av[1]); 3693 rule->set = set; 3694 tstate->set = set; 3695 av += 2; 3696 } 3697 3698 /* [prob D] -- match probability, optional */ 3699 if (av[0] && av[1] && _substrcmp(*av, "prob") == 0) { 3700 match_prob = strtod(av[1], NULL); 3701 3702 if (match_prob <= 0 || match_prob > 1) 3703 errx(EX_DATAERR, "illegal match prob. %s", av[1]); 3704 av += 2; 3705 } 3706 3707 /* action -- mandatory */ 3708 NEED1("missing action"); 3709 i = match_token(rule_actions, *av); 3710 av++; 3711 action->len = 1; /* default */ 3712 CHECK_ACTLEN; 3713 switch(i) { 3714 case TOK_CHECKSTATE: 3715 have_state = action; 3716 action->opcode = O_CHECK_STATE; 3717 if (*av == NULL) { 3718 action->arg1 = pack_object(tstate, 3719 default_state_name, IPFW_TLV_STATE_NAME); 3720 break; 3721 } 3722 if (strcmp(*av, "any") == 0) 3723 action->arg1 = 0; 3724 else if ((i = match_token(rule_options, *av)) != -1) { 3725 action->arg1 = pack_object(tstate, 3726 default_state_name, IPFW_TLV_STATE_NAME); 3727 if (i != TOK_COMMENT) 3728 warn("Ambiguous state name '%s', '%s'" 3729 " used instead.\n", *av, 3730 default_state_name); 3731 break; 3732 } else if (state_check_name(*av) == 0) 3733 action->arg1 = pack_object(tstate, *av, 3734 IPFW_TLV_STATE_NAME); 3735 else 3736 errx(EX_DATAERR, "Invalid state name %s", *av); 3737 av++; 3738 break; 3739 3740 case TOK_ACCEPT: 3741 action->opcode = O_ACCEPT; 3742 break; 3743 3744 case TOK_DENY: 3745 action->opcode = O_DENY; 3746 action->arg1 = 0; 3747 break; 3748 3749 case TOK_REJECT: 3750 action->opcode = O_REJECT; 3751 action->arg1 = ICMP_UNREACH_HOST; 3752 break; 3753 3754 case TOK_RESET: 3755 action->opcode = O_REJECT; 3756 action->arg1 = ICMP_REJECT_RST; 3757 break; 3758 3759 case TOK_RESET6: 3760 action->opcode = O_UNREACH6; 3761 action->arg1 = ICMP6_UNREACH_RST; 3762 break; 3763 3764 case TOK_UNREACH: 3765 action->opcode = O_REJECT; 3766 NEED1("missing reject code"); 3767 fill_reject_code(&action->arg1, *av); 3768 av++; 3769 break; 3770 3771 case TOK_UNREACH6: 3772 action->opcode = O_UNREACH6; 3773 NEED1("missing unreach code"); 3774 fill_unreach6_code(&action->arg1, *av); 3775 av++; 3776 break; 3777 3778 case TOK_COUNT: 3779 action->opcode = O_COUNT; 3780 break; 3781 3782 case TOK_NAT: 3783 action->opcode = O_NAT; 3784 action->len = F_INSN_SIZE(ipfw_insn_nat); 3785 CHECK_ACTLEN; 3786 if (*av != NULL && _substrcmp(*av, "global") == 0) { 3787 action->arg1 = IP_FW_NAT44_GLOBAL; 3788 av++; 3789 break; 3790 } else 3791 goto chkarg; 3792 case TOK_QUEUE: 3793 action->opcode = O_QUEUE; 3794 goto chkarg; 3795 case TOK_PIPE: 3796 action->opcode = O_PIPE; 3797 goto chkarg; 3798 case TOK_SKIPTO: 3799 action->opcode = O_SKIPTO; 3800 goto chkarg; 3801 case TOK_NETGRAPH: 3802 action->opcode = O_NETGRAPH; 3803 goto chkarg; 3804 case TOK_NGTEE: 3805 action->opcode = O_NGTEE; 3806 goto chkarg; 3807 case TOK_DIVERT: 3808 action->opcode = O_DIVERT; 3809 goto chkarg; 3810 case TOK_TEE: 3811 action->opcode = O_TEE; 3812 goto chkarg; 3813 case TOK_CALL: 3814 action->opcode = O_CALLRETURN; 3815 chkarg: 3816 if (!av[0]) 3817 errx(EX_USAGE, "missing argument for %s", *(av - 1)); 3818 if (isdigit(**av)) { 3819 action->arg1 = strtoul(*av, NULL, 10); 3820 if (action->arg1 <= 0 || action->arg1 >= IP_FW_TABLEARG) 3821 errx(EX_DATAERR, "illegal argument for %s", 3822 *(av - 1)); 3823 } else if (_substrcmp(*av, "tablearg") == 0) { 3824 action->arg1 = IP_FW_TARG; 3825 } else if (i == TOK_DIVERT || i == TOK_TEE) { 3826 struct servent *s; 3827 setservent(1); 3828 s = getservbyname(av[0], "divert"); 3829 if (s != NULL) 3830 action->arg1 = ntohs(s->s_port); 3831 else 3832 errx(EX_DATAERR, "illegal divert/tee port"); 3833 } else 3834 errx(EX_DATAERR, "illegal argument for %s", *(av - 1)); 3835 av++; 3836 break; 3837 3838 case TOK_FORWARD: { 3839 /* 3840 * Locate the address-port separator (':' or ','). 3841 * Could be one of the following: 3842 * hostname:port 3843 * IPv4 a.b.c.d,port 3844 * IPv4 a.b.c.d:port 3845 * IPv6 w:x:y::z,port 3846 * The ':' can only be used with hostname and IPv4 address. 3847 * XXX-BZ Should we also support [w:x:y::z]:port? 3848 */ 3849 struct sockaddr_storage result; 3850 struct addrinfo *res; 3851 char *s, *end; 3852 int family; 3853 u_short port_number; 3854 3855 NEED1("missing forward address[:port]"); 3856 3857 /* 3858 * locate the address-port separator (':' or ',') 3859 */ 3860 s = strchr(*av, ','); 3861 if (s == NULL) { 3862 /* Distinguish between IPv4:port and IPv6 cases. */ 3863 s = strchr(*av, ':'); 3864 if (s && strchr(s+1, ':')) 3865 s = NULL; /* no port */ 3866 } 3867 3868 port_number = 0; 3869 if (s != NULL) { 3870 /* Terminate host portion and set s to start of port. */ 3871 *(s++) = '\0'; 3872 i = strtoport(s, &end, 0 /* base */, 0 /* proto */); 3873 if (s == end) 3874 errx(EX_DATAERR, 3875 "illegal forwarding port ``%s''", s); 3876 port_number = (u_short)i; 3877 } 3878 3879 if (_substrcmp(*av, "tablearg") == 0) { 3880 family = PF_INET; 3881 ((struct sockaddr_in*)&result)->sin_addr.s_addr = 3882 INADDR_ANY; 3883 } else { 3884 /* 3885 * Resolve the host name or address to a family and a 3886 * network representation of the address. 3887 */ 3888 if (getaddrinfo(*av, NULL, NULL, &res)) 3889 errx(EX_DATAERR, NULL); 3890 /* Just use the first host in the answer. */ 3891 family = res->ai_family; 3892 memcpy(&result, res->ai_addr, res->ai_addrlen); 3893 freeaddrinfo(res); 3894 } 3895 3896 if (family == PF_INET) { 3897 ipfw_insn_sa *p = (ipfw_insn_sa *)action; 3898 3899 action->opcode = O_FORWARD_IP; 3900 action->len = F_INSN_SIZE(ipfw_insn_sa); 3901 CHECK_ACTLEN; 3902 3903 /* 3904 * In the kernel we assume AF_INET and use only 3905 * sin_port and sin_addr. Remember to set sin_len as 3906 * the routing code seems to use it too. 3907 */ 3908 p->sa.sin_len = sizeof(struct sockaddr_in); 3909 p->sa.sin_family = AF_INET; 3910 p->sa.sin_port = port_number; 3911 p->sa.sin_addr.s_addr = 3912 ((struct sockaddr_in *)&result)->sin_addr.s_addr; 3913 } else if (family == PF_INET6) { 3914 ipfw_insn_sa6 *p = (ipfw_insn_sa6 *)action; 3915 3916 action->opcode = O_FORWARD_IP6; 3917 action->len = F_INSN_SIZE(ipfw_insn_sa6); 3918 CHECK_ACTLEN; 3919 3920 p->sa.sin6_len = sizeof(struct sockaddr_in6); 3921 p->sa.sin6_family = AF_INET6; 3922 p->sa.sin6_port = port_number; 3923 p->sa.sin6_flowinfo = 0; 3924 p->sa.sin6_scope_id = 3925 ((struct sockaddr_in6 *)&result)->sin6_scope_id; 3926 bcopy(&((struct sockaddr_in6*)&result)->sin6_addr, 3927 &p->sa.sin6_addr, sizeof(p->sa.sin6_addr)); 3928 } else { 3929 errx(EX_DATAERR, "Invalid address family in forward action"); 3930 } 3931 av++; 3932 break; 3933 } 3934 case TOK_COMMENT: 3935 /* pretend it is a 'count' rule followed by the comment */ 3936 action->opcode = O_COUNT; 3937 av--; /* go back... */ 3938 break; 3939 3940 case TOK_SETFIB: 3941 { 3942 int numfibs; 3943 size_t intsize = sizeof(int); 3944 3945 action->opcode = O_SETFIB; 3946 NEED1("missing fib number"); 3947 if (_substrcmp(*av, "tablearg") == 0) { 3948 action->arg1 = IP_FW_TARG; 3949 } else { 3950 action->arg1 = strtoul(*av, NULL, 10); 3951 if (sysctlbyname("net.fibs", &numfibs, &intsize, 3952 NULL, 0) == -1) 3953 errx(EX_DATAERR, "fibs not suported.\n"); 3954 if (action->arg1 >= numfibs) /* Temporary */ 3955 errx(EX_DATAERR, "fib too large.\n"); 3956 /* Add high-order bit to fib to make room for tablearg*/ 3957 action->arg1 |= 0x8000; 3958 } 3959 av++; 3960 break; 3961 } 3962 3963 case TOK_SETDSCP: 3964 { 3965 int code; 3966 3967 action->opcode = O_SETDSCP; 3968 NEED1("missing DSCP code"); 3969 if (_substrcmp(*av, "tablearg") == 0) { 3970 action->arg1 = IP_FW_TARG; 3971 } else { 3972 if (isalpha(*av[0])) { 3973 if ((code = match_token(f_ipdscp, *av)) == -1) 3974 errx(EX_DATAERR, "Unknown DSCP code"); 3975 action->arg1 = code; 3976 } else 3977 action->arg1 = strtoul(*av, NULL, 10); 3978 /* 3979 * Add high-order bit to DSCP to make room 3980 * for tablearg 3981 */ 3982 action->arg1 |= 0x8000; 3983 } 3984 av++; 3985 break; 3986 } 3987 3988 case TOK_REASS: 3989 action->opcode = O_REASS; 3990 break; 3991 3992 case TOK_RETURN: 3993 fill_cmd(action, O_CALLRETURN, F_NOT, 0); 3994 break; 3995 3996 default: 3997 av--; 3998 if (match_token(rule_eactions, *av) == -1) 3999 errx(EX_DATAERR, "invalid action %s\n", *av); 4000 /* 4001 * External actions support. 4002 * XXX: we support only syntax with instance name. 4003 * For known external actions (from rule_eactions list) 4004 * we can handle syntax directly. But with `eaction' 4005 * keyword we can use only `eaction <name> <instance>' 4006 * syntax. 4007 */ 4008 case TOK_EACTION: { 4009 uint16_t idx; 4010 4011 NEED1("Missing eaction name"); 4012 if (eaction_check_name(*av) != 0) 4013 errx(EX_DATAERR, "Invalid eaction name %s", *av); 4014 idx = pack_object(tstate, *av, IPFW_TLV_EACTION); 4015 if (idx == 0) 4016 errx(EX_DATAERR, "pack_object failed"); 4017 fill_cmd(action, O_EXTERNAL_ACTION, 0, idx); 4018 av++; 4019 NEED1("Missing eaction instance name"); 4020 action = next_cmd(action, &ablen); 4021 action->len = 1; 4022 CHECK_ACTLEN; 4023 if (eaction_check_name(*av) != 0) 4024 errx(EX_DATAERR, "Invalid eaction instance name %s", 4025 *av); 4026 /* 4027 * External action instance object has TLV type depended 4028 * from the external action name object index. Since we 4029 * currently don't know this index, use zero as TLV type. 4030 */ 4031 idx = pack_object(tstate, *av, 0); 4032 if (idx == 0) 4033 errx(EX_DATAERR, "pack_object failed"); 4034 fill_cmd(action, O_EXTERNAL_INSTANCE, 0, idx); 4035 av++; 4036 } 4037 } 4038 action = next_cmd(action, &ablen); 4039 4040 /* 4041 * [altq queuename] -- altq tag, optional 4042 * [log [logamount N]] -- log, optional 4043 * 4044 * If they exist, it go first in the cmdbuf, but then it is 4045 * skipped in the copy section to the end of the buffer. 4046 */ 4047 while (av[0] != NULL && (i = match_token(rule_action_params, *av)) != -1) { 4048 av++; 4049 switch (i) { 4050 case TOK_LOG: 4051 { 4052 ipfw_insn_log *c = (ipfw_insn_log *)cmd; 4053 int l; 4054 4055 if (have_log) 4056 errx(EX_DATAERR, 4057 "log cannot be specified more than once"); 4058 have_log = (ipfw_insn *)c; 4059 cmd->len = F_INSN_SIZE(ipfw_insn_log); 4060 CHECK_CMDLEN; 4061 cmd->opcode = O_LOG; 4062 if (av[0] && _substrcmp(*av, "logamount") == 0) { 4063 av++; 4064 NEED1("logamount requires argument"); 4065 l = atoi(*av); 4066 if (l < 0) 4067 errx(EX_DATAERR, 4068 "logamount must be positive"); 4069 c->max_log = l; 4070 av++; 4071 } else { 4072 len = sizeof(c->max_log); 4073 if (sysctlbyname("net.inet.ip.fw.verbose_limit", 4074 &c->max_log, &len, NULL, 0) == -1) { 4075 if (co.test_only) { 4076 c->max_log = 0; 4077 break; 4078 } 4079 errx(1, "sysctlbyname(\"%s\")", 4080 "net.inet.ip.fw.verbose_limit"); 4081 } 4082 } 4083 } 4084 break; 4085 4086 #ifndef NO_ALTQ 4087 case TOK_ALTQ: 4088 { 4089 ipfw_insn_altq *a = (ipfw_insn_altq *)cmd; 4090 4091 NEED1("missing altq queue name"); 4092 if (have_altq) 4093 errx(EX_DATAERR, 4094 "altq cannot be specified more than once"); 4095 have_altq = (ipfw_insn *)a; 4096 cmd->len = F_INSN_SIZE(ipfw_insn_altq); 4097 CHECK_CMDLEN; 4098 cmd->opcode = O_ALTQ; 4099 a->qid = altq_name_to_qid(*av); 4100 av++; 4101 } 4102 break; 4103 #endif 4104 4105 case TOK_TAG: 4106 case TOK_UNTAG: { 4107 uint16_t tag; 4108 4109 if (have_tag) 4110 errx(EX_USAGE, "tag and untag cannot be " 4111 "specified more than once"); 4112 GET_UINT_ARG(tag, IPFW_ARG_MIN, IPFW_ARG_MAX, i, 4113 rule_action_params); 4114 have_tag = cmd; 4115 fill_cmd(cmd, O_TAG, (i == TOK_TAG) ? 0: F_NOT, tag); 4116 av++; 4117 break; 4118 } 4119 4120 default: 4121 abort(); 4122 } 4123 cmd = next_cmd(cmd, &cblen); 4124 } 4125 4126 if (have_state) { /* must be a check-state, we are done */ 4127 if (*av != NULL && 4128 match_token(rule_options, *av) == TOK_COMMENT) { 4129 /* check-state has a comment */ 4130 av++; 4131 fill_comment(cmd, av, cblen); 4132 cmd = next_cmd(cmd, &cblen); 4133 av[0] = NULL; 4134 } 4135 goto done; 4136 } 4137 4138 #define OR_START(target) \ 4139 if (av[0] && (*av[0] == '(' || *av[0] == '{')) { \ 4140 if (open_par) \ 4141 errx(EX_USAGE, "nested \"(\" not allowed\n"); \ 4142 prev = NULL; \ 4143 open_par = 1; \ 4144 if ( (av[0])[1] == '\0') { \ 4145 av++; \ 4146 } else \ 4147 (*av)++; \ 4148 } \ 4149 target: \ 4150 4151 4152 #define CLOSE_PAR \ 4153 if (open_par) { \ 4154 if (av[0] && ( \ 4155 strcmp(*av, ")") == 0 || \ 4156 strcmp(*av, "}") == 0)) { \ 4157 prev = NULL; \ 4158 open_par = 0; \ 4159 av++; \ 4160 } else \ 4161 errx(EX_USAGE, "missing \")\"\n"); \ 4162 } 4163 4164 #define NOT_BLOCK \ 4165 if (av[0] && _substrcmp(*av, "not") == 0) { \ 4166 if (cmd->len & F_NOT) \ 4167 errx(EX_USAGE, "double \"not\" not allowed\n"); \ 4168 cmd->len |= F_NOT; \ 4169 av++; \ 4170 } 4171 4172 #define OR_BLOCK(target) \ 4173 if (av[0] && _substrcmp(*av, "or") == 0) { \ 4174 if (prev == NULL || open_par == 0) \ 4175 errx(EX_DATAERR, "invalid OR block"); \ 4176 prev->len |= F_OR; \ 4177 av++; \ 4178 goto target; \ 4179 } \ 4180 CLOSE_PAR; 4181 4182 first_cmd = cmd; 4183 4184 #if 0 4185 /* 4186 * MAC addresses, optional. 4187 * If we have this, we skip the part "proto from src to dst" 4188 * and jump straight to the option parsing. 4189 */ 4190 NOT_BLOCK; 4191 NEED1("missing protocol"); 4192 if (_substrcmp(*av, "MAC") == 0 || 4193 _substrcmp(*av, "mac") == 0) { 4194 av++; /* the "MAC" keyword */ 4195 add_mac(cmd, av); /* exits in case of errors */ 4196 cmd = next_cmd(cmd); 4197 av += 2; /* dst-mac and src-mac */ 4198 NOT_BLOCK; 4199 NEED1("missing mac type"); 4200 if (add_mactype(cmd, av[0])) 4201 cmd = next_cmd(cmd); 4202 av++; /* any or mac-type */ 4203 goto read_options; 4204 } 4205 #endif 4206 4207 /* 4208 * protocol, mandatory 4209 */ 4210 OR_START(get_proto); 4211 NOT_BLOCK; 4212 NEED1("missing protocol"); 4213 if (add_proto_compat(cmd, *av, &proto)) { 4214 av++; 4215 if (F_LEN(cmd) != 0) { 4216 prev = cmd; 4217 cmd = next_cmd(cmd, &cblen); 4218 } 4219 } else if (first_cmd != cmd) { 4220 errx(EX_DATAERR, "invalid protocol ``%s''", *av); 4221 } else 4222 goto read_options; 4223 OR_BLOCK(get_proto); 4224 4225 /* 4226 * "from", mandatory 4227 */ 4228 if ((av[0] == NULL) || _substrcmp(*av, "from") != 0) 4229 errx(EX_USAGE, "missing ``from''"); 4230 av++; 4231 4232 /* 4233 * source IP, mandatory 4234 */ 4235 OR_START(source_ip); 4236 NOT_BLOCK; /* optional "not" */ 4237 NEED1("missing source address"); 4238 if (add_src(cmd, *av, proto, cblen, tstate)) { 4239 av++; 4240 if (F_LEN(cmd) != 0) { /* ! any */ 4241 prev = cmd; 4242 cmd = next_cmd(cmd, &cblen); 4243 } 4244 } else 4245 errx(EX_USAGE, "bad source address %s", *av); 4246 OR_BLOCK(source_ip); 4247 4248 /* 4249 * source ports, optional 4250 */ 4251 NOT_BLOCK; /* optional "not" */ 4252 if ( av[0] != NULL ) { 4253 if (_substrcmp(*av, "any") == 0 || 4254 add_ports(cmd, *av, proto, O_IP_SRCPORT, cblen)) { 4255 av++; 4256 if (F_LEN(cmd) != 0) 4257 cmd = next_cmd(cmd, &cblen); 4258 } 4259 } 4260 4261 /* 4262 * "to", mandatory 4263 */ 4264 if ( (av[0] == NULL) || _substrcmp(*av, "to") != 0 ) 4265 errx(EX_USAGE, "missing ``to''"); 4266 av++; 4267 4268 /* 4269 * destination, mandatory 4270 */ 4271 OR_START(dest_ip); 4272 NOT_BLOCK; /* optional "not" */ 4273 NEED1("missing dst address"); 4274 if (add_dst(cmd, *av, proto, cblen, tstate)) { 4275 av++; 4276 if (F_LEN(cmd) != 0) { /* ! any */ 4277 prev = cmd; 4278 cmd = next_cmd(cmd, &cblen); 4279 } 4280 } else 4281 errx( EX_USAGE, "bad destination address %s", *av); 4282 OR_BLOCK(dest_ip); 4283 4284 /* 4285 * dest. ports, optional 4286 */ 4287 NOT_BLOCK; /* optional "not" */ 4288 if (av[0]) { 4289 if (_substrcmp(*av, "any") == 0 || 4290 add_ports(cmd, *av, proto, O_IP_DSTPORT, cblen)) { 4291 av++; 4292 if (F_LEN(cmd) != 0) 4293 cmd = next_cmd(cmd, &cblen); 4294 } 4295 } 4296 4297 read_options: 4298 if (av[0] && first_cmd == cmd) { 4299 /* 4300 * nothing specified so far, store in the rule to ease 4301 * printout later. 4302 */ 4303 rule->flags |= IPFW_RULE_NOOPT; 4304 } 4305 prev = NULL; 4306 while ( av[0] != NULL ) { 4307 char *s; 4308 ipfw_insn_u32 *cmd32; /* alias for cmd */ 4309 4310 s = *av; 4311 cmd32 = (ipfw_insn_u32 *)cmd; 4312 4313 if (*s == '!') { /* alternate syntax for NOT */ 4314 if (cmd->len & F_NOT) 4315 errx(EX_USAGE, "double \"not\" not allowed\n"); 4316 cmd->len = F_NOT; 4317 s++; 4318 } 4319 i = match_token(rule_options, s); 4320 av++; 4321 switch(i) { 4322 case TOK_NOT: 4323 if (cmd->len & F_NOT) 4324 errx(EX_USAGE, "double \"not\" not allowed\n"); 4325 cmd->len = F_NOT; 4326 break; 4327 4328 case TOK_OR: 4329 if (open_par == 0 || prev == NULL) 4330 errx(EX_USAGE, "invalid \"or\" block\n"); 4331 prev->len |= F_OR; 4332 break; 4333 4334 case TOK_STARTBRACE: 4335 if (open_par) 4336 errx(EX_USAGE, "+nested \"(\" not allowed\n"); 4337 open_par = 1; 4338 break; 4339 4340 case TOK_ENDBRACE: 4341 if (!open_par) 4342 errx(EX_USAGE, "+missing \")\"\n"); 4343 open_par = 0; 4344 prev = NULL; 4345 break; 4346 4347 case TOK_IN: 4348 fill_cmd(cmd, O_IN, 0, 0); 4349 break; 4350 4351 case TOK_OUT: 4352 cmd->len ^= F_NOT; /* toggle F_NOT */ 4353 fill_cmd(cmd, O_IN, 0, 0); 4354 break; 4355 4356 case TOK_DIVERTED: 4357 fill_cmd(cmd, O_DIVERTED, 0, 3); 4358 break; 4359 4360 case TOK_DIVERTEDLOOPBACK: 4361 fill_cmd(cmd, O_DIVERTED, 0, 1); 4362 break; 4363 4364 case TOK_DIVERTEDOUTPUT: 4365 fill_cmd(cmd, O_DIVERTED, 0, 2); 4366 break; 4367 4368 case TOK_FRAG: 4369 fill_cmd(cmd, O_FRAG, 0, 0); 4370 break; 4371 4372 case TOK_LAYER2: 4373 fill_cmd(cmd, O_LAYER2, 0, 0); 4374 break; 4375 4376 case TOK_XMIT: 4377 case TOK_RECV: 4378 case TOK_VIA: 4379 NEED1("recv, xmit, via require interface name" 4380 " or address"); 4381 fill_iface((ipfw_insn_if *)cmd, av[0], cblen, tstate); 4382 av++; 4383 if (F_LEN(cmd) == 0) /* not a valid address */ 4384 break; 4385 if (i == TOK_XMIT) 4386 cmd->opcode = O_XMIT; 4387 else if (i == TOK_RECV) 4388 cmd->opcode = O_RECV; 4389 else if (i == TOK_VIA) 4390 cmd->opcode = O_VIA; 4391 break; 4392 4393 case TOK_ICMPTYPES: 4394 NEED1("icmptypes requires list of types"); 4395 fill_icmptypes((ipfw_insn_u32 *)cmd, *av); 4396 av++; 4397 break; 4398 4399 case TOK_ICMP6TYPES: 4400 NEED1("icmptypes requires list of types"); 4401 fill_icmp6types((ipfw_insn_icmp6 *)cmd, *av, cblen); 4402 av++; 4403 break; 4404 4405 case TOK_IPTTL: 4406 NEED1("ipttl requires TTL"); 4407 if (strpbrk(*av, "-,")) { 4408 if (!add_ports(cmd, *av, 0, O_IPTTL, cblen)) 4409 errx(EX_DATAERR, "invalid ipttl %s", *av); 4410 } else 4411 fill_cmd(cmd, O_IPTTL, 0, strtoul(*av, NULL, 0)); 4412 av++; 4413 break; 4414 4415 case TOK_IPID: 4416 NEED1("ipid requires id"); 4417 if (strpbrk(*av, "-,")) { 4418 if (!add_ports(cmd, *av, 0, O_IPID, cblen)) 4419 errx(EX_DATAERR, "invalid ipid %s", *av); 4420 } else 4421 fill_cmd(cmd, O_IPID, 0, strtoul(*av, NULL, 0)); 4422 av++; 4423 break; 4424 4425 case TOK_IPLEN: 4426 NEED1("iplen requires length"); 4427 if (strpbrk(*av, "-,")) { 4428 if (!add_ports(cmd, *av, 0, O_IPLEN, cblen)) 4429 errx(EX_DATAERR, "invalid ip len %s", *av); 4430 } else 4431 fill_cmd(cmd, O_IPLEN, 0, strtoul(*av, NULL, 0)); 4432 av++; 4433 break; 4434 4435 case TOK_IPVER: 4436 NEED1("ipver requires version"); 4437 fill_cmd(cmd, O_IPVER, 0, strtoul(*av, NULL, 0)); 4438 av++; 4439 break; 4440 4441 case TOK_IPPRECEDENCE: 4442 NEED1("ipprecedence requires value"); 4443 fill_cmd(cmd, O_IPPRECEDENCE, 0, 4444 (strtoul(*av, NULL, 0) & 7) << 5); 4445 av++; 4446 break; 4447 4448 case TOK_DSCP: 4449 NEED1("missing DSCP code"); 4450 fill_dscp(cmd, *av, cblen); 4451 av++; 4452 break; 4453 4454 case TOK_IPOPTS: 4455 NEED1("missing argument for ipoptions"); 4456 fill_flags_cmd(cmd, O_IPOPT, f_ipopts, *av); 4457 av++; 4458 break; 4459 4460 case TOK_IPTOS: 4461 NEED1("missing argument for iptos"); 4462 fill_flags_cmd(cmd, O_IPTOS, f_iptos, *av); 4463 av++; 4464 break; 4465 4466 case TOK_UID: 4467 NEED1("uid requires argument"); 4468 { 4469 char *end; 4470 uid_t uid; 4471 struct passwd *pwd; 4472 4473 cmd->opcode = O_UID; 4474 uid = strtoul(*av, &end, 0); 4475 pwd = (*end == '\0') ? getpwuid(uid) : getpwnam(*av); 4476 if (pwd == NULL) 4477 errx(EX_DATAERR, "uid \"%s\" nonexistent", *av); 4478 cmd32->d[0] = pwd->pw_uid; 4479 cmd->len |= F_INSN_SIZE(ipfw_insn_u32); 4480 av++; 4481 } 4482 break; 4483 4484 case TOK_GID: 4485 NEED1("gid requires argument"); 4486 { 4487 char *end; 4488 gid_t gid; 4489 struct group *grp; 4490 4491 cmd->opcode = O_GID; 4492 gid = strtoul(*av, &end, 0); 4493 grp = (*end == '\0') ? getgrgid(gid) : getgrnam(*av); 4494 if (grp == NULL) 4495 errx(EX_DATAERR, "gid \"%s\" nonexistent", *av); 4496 cmd32->d[0] = grp->gr_gid; 4497 cmd->len |= F_INSN_SIZE(ipfw_insn_u32); 4498 av++; 4499 } 4500 break; 4501 4502 case TOK_JAIL: 4503 NEED1("jail requires argument"); 4504 { 4505 char *end; 4506 int jid; 4507 4508 cmd->opcode = O_JAIL; 4509 jid = (int)strtol(*av, &end, 0); 4510 if (jid < 0 || *end != '\0') 4511 errx(EX_DATAERR, "jail requires prison ID"); 4512 cmd32->d[0] = (uint32_t)jid; 4513 cmd->len |= F_INSN_SIZE(ipfw_insn_u32); 4514 av++; 4515 } 4516 break; 4517 4518 case TOK_ESTAB: 4519 fill_cmd(cmd, O_ESTAB, 0, 0); 4520 break; 4521 4522 case TOK_SETUP: 4523 fill_cmd(cmd, O_TCPFLAGS, 0, 4524 (TH_SYN) | ( (TH_ACK) & 0xff) <<8 ); 4525 break; 4526 4527 case TOK_TCPDATALEN: 4528 NEED1("tcpdatalen requires length"); 4529 if (strpbrk(*av, "-,")) { 4530 if (!add_ports(cmd, *av, 0, O_TCPDATALEN, cblen)) 4531 errx(EX_DATAERR, "invalid tcpdata len %s", *av); 4532 } else 4533 fill_cmd(cmd, O_TCPDATALEN, 0, 4534 strtoul(*av, NULL, 0)); 4535 av++; 4536 break; 4537 4538 case TOK_TCPOPTS: 4539 NEED1("missing argument for tcpoptions"); 4540 fill_flags_cmd(cmd, O_TCPOPTS, f_tcpopts, *av); 4541 av++; 4542 break; 4543 4544 case TOK_TCPSEQ: 4545 case TOK_TCPACK: 4546 NEED1("tcpseq/tcpack requires argument"); 4547 cmd->len = F_INSN_SIZE(ipfw_insn_u32); 4548 cmd->opcode = (i == TOK_TCPSEQ) ? O_TCPSEQ : O_TCPACK; 4549 cmd32->d[0] = htonl(strtoul(*av, NULL, 0)); 4550 av++; 4551 break; 4552 4553 case TOK_TCPWIN: 4554 NEED1("tcpwin requires length"); 4555 if (strpbrk(*av, "-,")) { 4556 if (!add_ports(cmd, *av, 0, O_TCPWIN, cblen)) 4557 errx(EX_DATAERR, "invalid tcpwin len %s", *av); 4558 } else 4559 fill_cmd(cmd, O_TCPWIN, 0, 4560 strtoul(*av, NULL, 0)); 4561 av++; 4562 break; 4563 4564 case TOK_TCPFLAGS: 4565 NEED1("missing argument for tcpflags"); 4566 cmd->opcode = O_TCPFLAGS; 4567 fill_flags_cmd(cmd, O_TCPFLAGS, f_tcpflags, *av); 4568 av++; 4569 break; 4570 4571 case TOK_KEEPSTATE: { 4572 uint16_t uidx; 4573 4574 if (open_par) 4575 errx(EX_USAGE, "keep-state cannot be part " 4576 "of an or block"); 4577 if (have_state) 4578 errx(EX_USAGE, "only one of keep-state " 4579 "and limit is allowed"); 4580 if (*av == NULL || 4581 (i = match_token(rule_options, *av)) != -1) { 4582 if (*av != NULL && i != TOK_COMMENT) 4583 warn("Ambiguous state name '%s'," 4584 " '%s' used instead.\n", *av, 4585 default_state_name); 4586 uidx = pack_object(tstate, default_state_name, 4587 IPFW_TLV_STATE_NAME); 4588 } else { 4589 if (state_check_name(*av) != 0) 4590 errx(EX_DATAERR, 4591 "Invalid state name %s", *av); 4592 uidx = pack_object(tstate, *av, 4593 IPFW_TLV_STATE_NAME); 4594 av++; 4595 } 4596 have_state = cmd; 4597 fill_cmd(cmd, O_KEEP_STATE, 0, uidx); 4598 break; 4599 } 4600 4601 case TOK_LIMIT: { 4602 ipfw_insn_limit *c = (ipfw_insn_limit *)cmd; 4603 int val; 4604 4605 if (open_par) 4606 errx(EX_USAGE, 4607 "limit cannot be part of an or block"); 4608 if (have_state) 4609 errx(EX_USAGE, "only one of keep-state and " 4610 "limit is allowed"); 4611 have_state = cmd; 4612 4613 cmd->len = F_INSN_SIZE(ipfw_insn_limit); 4614 CHECK_CMDLEN; 4615 cmd->opcode = O_LIMIT; 4616 c->limit_mask = c->conn_limit = 0; 4617 4618 while ( av[0] != NULL ) { 4619 if ((val = match_token(limit_masks, *av)) <= 0) 4620 break; 4621 c->limit_mask |= val; 4622 av++; 4623 } 4624 4625 if (c->limit_mask == 0) 4626 errx(EX_USAGE, "limit: missing limit mask"); 4627 4628 GET_UINT_ARG(c->conn_limit, IPFW_ARG_MIN, IPFW_ARG_MAX, 4629 TOK_LIMIT, rule_options); 4630 av++; 4631 4632 if (*av == NULL || 4633 (i = match_token(rule_options, *av)) != -1) { 4634 if (*av != NULL && i != TOK_COMMENT) 4635 warn("Ambiguous state name '%s'," 4636 " '%s' used instead.\n", *av, 4637 default_state_name); 4638 cmd->arg1 = pack_object(tstate, 4639 default_state_name, IPFW_TLV_STATE_NAME); 4640 } else { 4641 if (state_check_name(*av) != 0) 4642 errx(EX_DATAERR, 4643 "Invalid state name %s", *av); 4644 cmd->arg1 = pack_object(tstate, *av, 4645 IPFW_TLV_STATE_NAME); 4646 av++; 4647 } 4648 break; 4649 } 4650 4651 case TOK_PROTO: 4652 NEED1("missing protocol"); 4653 if (add_proto(cmd, *av, &proto)) { 4654 av++; 4655 } else 4656 errx(EX_DATAERR, "invalid protocol ``%s''", 4657 *av); 4658 break; 4659 4660 case TOK_SRCIP: 4661 NEED1("missing source IP"); 4662 if (add_srcip(cmd, *av, cblen, tstate)) { 4663 av++; 4664 } 4665 break; 4666 4667 case TOK_DSTIP: 4668 NEED1("missing destination IP"); 4669 if (add_dstip(cmd, *av, cblen, tstate)) { 4670 av++; 4671 } 4672 break; 4673 4674 case TOK_SRCIP6: 4675 NEED1("missing source IP6"); 4676 if (add_srcip6(cmd, *av, cblen, tstate)) { 4677 av++; 4678 } 4679 break; 4680 4681 case TOK_DSTIP6: 4682 NEED1("missing destination IP6"); 4683 if (add_dstip6(cmd, *av, cblen, tstate)) { 4684 av++; 4685 } 4686 break; 4687 4688 case TOK_SRCPORT: 4689 NEED1("missing source port"); 4690 if (_substrcmp(*av, "any") == 0 || 4691 add_ports(cmd, *av, proto, O_IP_SRCPORT, cblen)) { 4692 av++; 4693 } else 4694 errx(EX_DATAERR, "invalid source port %s", *av); 4695 break; 4696 4697 case TOK_DSTPORT: 4698 NEED1("missing destination port"); 4699 if (_substrcmp(*av, "any") == 0 || 4700 add_ports(cmd, *av, proto, O_IP_DSTPORT, cblen)) { 4701 av++; 4702 } else 4703 errx(EX_DATAERR, "invalid destination port %s", 4704 *av); 4705 break; 4706 4707 case TOK_MAC: 4708 if (add_mac(cmd, av, cblen)) 4709 av += 2; 4710 break; 4711 4712 case TOK_MACTYPE: 4713 NEED1("missing mac type"); 4714 if (!add_mactype(cmd, *av, cblen)) 4715 errx(EX_DATAERR, "invalid mac type %s", *av); 4716 av++; 4717 break; 4718 4719 case TOK_VERREVPATH: 4720 fill_cmd(cmd, O_VERREVPATH, 0, 0); 4721 break; 4722 4723 case TOK_VERSRCREACH: 4724 fill_cmd(cmd, O_VERSRCREACH, 0, 0); 4725 break; 4726 4727 case TOK_ANTISPOOF: 4728 fill_cmd(cmd, O_ANTISPOOF, 0, 0); 4729 break; 4730 4731 case TOK_IPSEC: 4732 fill_cmd(cmd, O_IPSEC, 0, 0); 4733 break; 4734 4735 case TOK_IPV6: 4736 fill_cmd(cmd, O_IP6, 0, 0); 4737 break; 4738 4739 case TOK_IPV4: 4740 fill_cmd(cmd, O_IP4, 0, 0); 4741 break; 4742 4743 case TOK_EXT6HDR: 4744 fill_ext6hdr( cmd, *av ); 4745 av++; 4746 break; 4747 4748 case TOK_FLOWID: 4749 if (proto != IPPROTO_IPV6 ) 4750 errx( EX_USAGE, "flow-id filter is active " 4751 "only for ipv6 protocol\n"); 4752 fill_flow6( (ipfw_insn_u32 *) cmd, *av, cblen); 4753 av++; 4754 break; 4755 4756 case TOK_COMMENT: 4757 fill_comment(cmd, av, cblen); 4758 av[0]=NULL; 4759 break; 4760 4761 case TOK_TAGGED: 4762 if (av[0] && strpbrk(*av, "-,")) { 4763 if (!add_ports(cmd, *av, 0, O_TAGGED, cblen)) 4764 errx(EX_DATAERR, "tagged: invalid tag" 4765 " list: %s", *av); 4766 } 4767 else { 4768 uint16_t tag; 4769 4770 GET_UINT_ARG(tag, IPFW_ARG_MIN, IPFW_ARG_MAX, 4771 TOK_TAGGED, rule_options); 4772 fill_cmd(cmd, O_TAGGED, 0, tag); 4773 } 4774 av++; 4775 break; 4776 4777 case TOK_FIB: 4778 NEED1("fib requires fib number"); 4779 fill_cmd(cmd, O_FIB, 0, strtoul(*av, NULL, 0)); 4780 av++; 4781 break; 4782 case TOK_SOCKARG: 4783 fill_cmd(cmd, O_SOCKARG, 0, 0); 4784 break; 4785 4786 case TOK_LOOKUP: { 4787 ipfw_insn_u32 *c = (ipfw_insn_u32 *)cmd; 4788 int j; 4789 4790 if (!av[0] || !av[1]) 4791 errx(EX_USAGE, "format: lookup argument tablenum"); 4792 cmd->opcode = O_IP_DST_LOOKUP; 4793 cmd->len |= F_INSN_SIZE(ipfw_insn) + 2; 4794 i = match_token(rule_options, *av); 4795 for (j = 0; lookup_key[j] >= 0 ; j++) { 4796 if (i == lookup_key[j]) 4797 break; 4798 } 4799 if (lookup_key[j] <= 0) 4800 errx(EX_USAGE, "format: cannot lookup on %s", *av); 4801 __PAST_END(c->d, 1) = j; // i converted to option 4802 av++; 4803 4804 if ((j = pack_table(tstate, *av)) == 0) 4805 errx(EX_DATAERR, "Invalid table name: %s", *av); 4806 4807 cmd->arg1 = j; 4808 av++; 4809 } 4810 break; 4811 case TOK_FLOW: 4812 NEED1("missing table name"); 4813 if (strncmp(*av, "table(", 6) != 0) 4814 errx(EX_DATAERR, 4815 "enclose table name into \"table()\""); 4816 fill_table(cmd, *av, O_IP_FLOW_LOOKUP, tstate); 4817 av++; 4818 break; 4819 4820 default: 4821 errx(EX_USAGE, "unrecognised option [%d] %s\n", i, s); 4822 } 4823 if (F_LEN(cmd) > 0) { /* prepare to advance */ 4824 prev = cmd; 4825 cmd = next_cmd(cmd, &cblen); 4826 } 4827 } 4828 4829 done: 4830 /* 4831 * Now copy stuff into the rule. 4832 * If we have a keep-state option, the first instruction 4833 * must be a PROBE_STATE (which is generated here). 4834 * If we have a LOG option, it was stored as the first command, 4835 * and now must be moved to the top of the action part. 4836 */ 4837 dst = (ipfw_insn *)rule->cmd; 4838 4839 /* 4840 * First thing to write into the command stream is the match probability. 4841 */ 4842 if (match_prob != 1) { /* 1 means always match */ 4843 dst->opcode = O_PROB; 4844 dst->len = 2; 4845 *((int32_t *)(dst+1)) = (int32_t)(match_prob * 0x7fffffff); 4846 dst += dst->len; 4847 } 4848 4849 /* 4850 * generate O_PROBE_STATE if necessary 4851 */ 4852 if (have_state && have_state->opcode != O_CHECK_STATE) { 4853 fill_cmd(dst, O_PROBE_STATE, 0, have_state->arg1); 4854 dst = next_cmd(dst, &rblen); 4855 } 4856 4857 /* copy all commands but O_LOG, O_KEEP_STATE, O_LIMIT, O_ALTQ, O_TAG */ 4858 for (src = (ipfw_insn *)cmdbuf; src != cmd; src += i) { 4859 i = F_LEN(src); 4860 CHECK_RBUFLEN(i); 4861 4862 switch (src->opcode) { 4863 case O_LOG: 4864 case O_KEEP_STATE: 4865 case O_LIMIT: 4866 case O_ALTQ: 4867 case O_TAG: 4868 break; 4869 default: 4870 bcopy(src, dst, i * sizeof(uint32_t)); 4871 dst += i; 4872 } 4873 } 4874 4875 /* 4876 * put back the have_state command as last opcode 4877 */ 4878 if (have_state && have_state->opcode != O_CHECK_STATE) { 4879 i = F_LEN(have_state); 4880 CHECK_RBUFLEN(i); 4881 bcopy(have_state, dst, i * sizeof(uint32_t)); 4882 dst += i; 4883 } 4884 /* 4885 * start action section 4886 */ 4887 rule->act_ofs = dst - rule->cmd; 4888 4889 /* put back O_LOG, O_ALTQ, O_TAG if necessary */ 4890 if (have_log) { 4891 i = F_LEN(have_log); 4892 CHECK_RBUFLEN(i); 4893 bcopy(have_log, dst, i * sizeof(uint32_t)); 4894 dst += i; 4895 } 4896 if (have_altq) { 4897 i = F_LEN(have_altq); 4898 CHECK_RBUFLEN(i); 4899 bcopy(have_altq, dst, i * sizeof(uint32_t)); 4900 dst += i; 4901 } 4902 if (have_tag) { 4903 i = F_LEN(have_tag); 4904 CHECK_RBUFLEN(i); 4905 bcopy(have_tag, dst, i * sizeof(uint32_t)); 4906 dst += i; 4907 } 4908 4909 /* 4910 * copy all other actions 4911 */ 4912 for (src = (ipfw_insn *)actbuf; src != action; src += i) { 4913 i = F_LEN(src); 4914 CHECK_RBUFLEN(i); 4915 bcopy(src, dst, i * sizeof(uint32_t)); 4916 dst += i; 4917 } 4918 4919 rule->cmd_len = (uint32_t *)dst - (uint32_t *)(rule->cmd); 4920 *rbufsize = (char *)dst - (char *)rule; 4921 } 4922 4923 static int 4924 compare_ntlv(const void *_a, const void *_b) 4925 { 4926 ipfw_obj_ntlv *a, *b; 4927 4928 a = (ipfw_obj_ntlv *)_a; 4929 b = (ipfw_obj_ntlv *)_b; 4930 4931 if (a->set < b->set) 4932 return (-1); 4933 else if (a->set > b->set) 4934 return (1); 4935 4936 if (a->idx < b->idx) 4937 return (-1); 4938 else if (a->idx > b->idx) 4939 return (1); 4940 4941 if (a->head.type < b->head.type) 4942 return (-1); 4943 else if (a->head.type > b->head.type) 4944 return (1); 4945 4946 return (0); 4947 } 4948 4949 /* 4950 * Provide kernel with sorted list of referenced objects 4951 */ 4952 static void 4953 object_sort_ctlv(ipfw_obj_ctlv *ctlv) 4954 { 4955 4956 qsort(ctlv + 1, ctlv->count, ctlv->objsize, compare_ntlv); 4957 } 4958 4959 struct object_kt { 4960 uint16_t uidx; 4961 uint16_t type; 4962 }; 4963 static int 4964 compare_object_kntlv(const void *k, const void *v) 4965 { 4966 ipfw_obj_ntlv *ntlv; 4967 struct object_kt key; 4968 4969 key = *((struct object_kt *)k); 4970 ntlv = (ipfw_obj_ntlv *)v; 4971 4972 if (key.uidx < ntlv->idx) 4973 return (-1); 4974 else if (key.uidx > ntlv->idx) 4975 return (1); 4976 4977 if (key.type < ntlv->head.type) 4978 return (-1); 4979 else if (key.type > ntlv->head.type) 4980 return (1); 4981 4982 return (0); 4983 } 4984 4985 /* 4986 * Finds object name in @ctlv by @idx and @type. 4987 * Uses the following facts: 4988 * 1) All TLVs are the same size 4989 * 2) Kernel implementation provides already sorted list. 4990 * 4991 * Returns table name or NULL. 4992 */ 4993 static char * 4994 object_search_ctlv(ipfw_obj_ctlv *ctlv, uint16_t idx, uint16_t type) 4995 { 4996 ipfw_obj_ntlv *ntlv; 4997 struct object_kt key; 4998 4999 key.uidx = idx; 5000 key.type = type; 5001 5002 ntlv = bsearch(&key, (ctlv + 1), ctlv->count, ctlv->objsize, 5003 compare_object_kntlv); 5004 5005 if (ntlv != NULL) 5006 return (ntlv->name); 5007 5008 return (NULL); 5009 } 5010 5011 static char * 5012 table_search_ctlv(ipfw_obj_ctlv *ctlv, uint16_t idx) 5013 { 5014 5015 return (object_search_ctlv(ctlv, idx, IPFW_TLV_TBL_NAME)); 5016 } 5017 5018 /* 5019 * Adds one or more rules to ipfw chain. 5020 * Data layout: 5021 * Request: 5022 * [ 5023 * ip_fw3_opheader 5024 * [ ipfw_obj_ctlv(IPFW_TLV_TBL_LIST) ipfw_obj_ntlv x N ] (optional *1) 5025 * [ ipfw_obj_ctlv(IPFW_TLV_RULE_LIST) [ ip_fw_rule ip_fw_insn ] x N ] (*2) (*3) 5026 * ] 5027 * Reply: 5028 * [ 5029 * ip_fw3_opheader 5030 * [ ipfw_obj_ctlv(IPFW_TLV_TBL_LIST) ipfw_obj_ntlv x N ] (optional) 5031 * [ ipfw_obj_ctlv(IPFW_TLV_RULE_LIST) [ ip_fw_rule ip_fw_insn ] x N ] 5032 * ] 5033 * 5034 * Rules in reply are modified to store their actual ruleset number. 5035 * 5036 * (*1) TLVs inside IPFW_TLV_TBL_LIST needs to be sorted ascending 5037 * according to their idx field and there has to be no duplicates. 5038 * (*2) Numbered rules inside IPFW_TLV_RULE_LIST needs to be sorted ascending. 5039 * (*3) Each ip_fw structure needs to be aligned to u64 boundary. 5040 */ 5041 void 5042 ipfw_add(char *av[]) 5043 { 5044 uint32_t rulebuf[1024]; 5045 int rbufsize, default_off, tlen, rlen; 5046 size_t sz; 5047 struct tidx ts; 5048 struct ip_fw_rule *rule; 5049 caddr_t tbuf; 5050 ip_fw3_opheader *op3; 5051 ipfw_obj_ctlv *ctlv, *tstate; 5052 5053 rbufsize = sizeof(rulebuf); 5054 memset(rulebuf, 0, rbufsize); 5055 memset(&ts, 0, sizeof(ts)); 5056 5057 /* Optimize case with no tables */ 5058 default_off = sizeof(ipfw_obj_ctlv) + sizeof(ip_fw3_opheader); 5059 op3 = (ip_fw3_opheader *)rulebuf; 5060 ctlv = (ipfw_obj_ctlv *)(op3 + 1); 5061 rule = (struct ip_fw_rule *)(ctlv + 1); 5062 rbufsize -= default_off; 5063 5064 compile_rule(av, (uint32_t *)rule, &rbufsize, &ts); 5065 /* Align rule size to u64 boundary */ 5066 rlen = roundup2(rbufsize, sizeof(uint64_t)); 5067 5068 tbuf = NULL; 5069 sz = 0; 5070 tstate = NULL; 5071 if (ts.count != 0) { 5072 /* Some tables. We have to alloc more data */ 5073 tlen = ts.count * sizeof(ipfw_obj_ntlv); 5074 sz = default_off + sizeof(ipfw_obj_ctlv) + tlen + rlen; 5075 5076 if ((tbuf = calloc(1, sz)) == NULL) 5077 err(EX_UNAVAILABLE, "malloc() failed for IP_FW_ADD"); 5078 op3 = (ip_fw3_opheader *)tbuf; 5079 /* Tables first */ 5080 ctlv = (ipfw_obj_ctlv *)(op3 + 1); 5081 ctlv->head.type = IPFW_TLV_TBLNAME_LIST; 5082 ctlv->head.length = sizeof(ipfw_obj_ctlv) + tlen; 5083 ctlv->count = ts.count; 5084 ctlv->objsize = sizeof(ipfw_obj_ntlv); 5085 memcpy(ctlv + 1, ts.idx, tlen); 5086 object_sort_ctlv(ctlv); 5087 tstate = ctlv; 5088 /* Rule next */ 5089 ctlv = (ipfw_obj_ctlv *)((caddr_t)ctlv + ctlv->head.length); 5090 ctlv->head.type = IPFW_TLV_RULE_LIST; 5091 ctlv->head.length = sizeof(ipfw_obj_ctlv) + rlen; 5092 ctlv->count = 1; 5093 memcpy(ctlv + 1, rule, rbufsize); 5094 } else { 5095 /* Simply add header */ 5096 sz = rlen + default_off; 5097 memset(ctlv, 0, sizeof(*ctlv)); 5098 ctlv->head.type = IPFW_TLV_RULE_LIST; 5099 ctlv->head.length = sizeof(ipfw_obj_ctlv) + rlen; 5100 ctlv->count = 1; 5101 } 5102 5103 if (do_get3(IP_FW_XADD, op3, &sz) != 0) 5104 err(EX_UNAVAILABLE, "getsockopt(%s)", "IP_FW_XADD"); 5105 5106 if (!co.do_quiet) { 5107 struct format_opts sfo; 5108 struct buf_pr bp; 5109 memset(&sfo, 0, sizeof(sfo)); 5110 sfo.tstate = tstate; 5111 sfo.set_mask = (uint32_t)(-1); 5112 bp_alloc(&bp, 4096); 5113 show_static_rule(&co, &sfo, &bp, rule, NULL); 5114 printf("%s", bp.buf); 5115 bp_free(&bp); 5116 } 5117 5118 if (tbuf != NULL) 5119 free(tbuf); 5120 5121 if (ts.idx != NULL) 5122 free(ts.idx); 5123 } 5124 5125 /* 5126 * clear the counters or the log counters. 5127 * optname has the following values: 5128 * 0 (zero both counters and logging) 5129 * 1 (zero logging only) 5130 */ 5131 void 5132 ipfw_zero(int ac, char *av[], int optname) 5133 { 5134 ipfw_range_tlv rt; 5135 uint32_t arg; 5136 int failed = EX_OK; 5137 char const *errstr; 5138 char const *name = optname ? "RESETLOG" : "ZERO"; 5139 5140 optname = optname ? IP_FW_XRESETLOG : IP_FW_XZERO; 5141 memset(&rt, 0, sizeof(rt)); 5142 5143 av++; ac--; 5144 5145 if (ac == 0) { 5146 /* clear all entries */ 5147 rt.flags = IPFW_RCFLAG_ALL; 5148 if (do_range_cmd(optname, &rt) < 0) 5149 err(EX_UNAVAILABLE, "setsockopt(IP_FW_X%s)", name); 5150 if (!co.do_quiet) 5151 printf("%s.\n", optname == IP_FW_XZERO ? 5152 "Accounting cleared":"Logging counts reset"); 5153 5154 return; 5155 } 5156 5157 while (ac) { 5158 /* Rule number */ 5159 if (isdigit(**av)) { 5160 arg = strtonum(*av, 0, 0xffff, &errstr); 5161 if (errstr) 5162 errx(EX_DATAERR, 5163 "invalid rule number %s\n", *av); 5164 rt.start_rule = arg; 5165 rt.end_rule = arg; 5166 rt.flags |= IPFW_RCFLAG_RANGE; 5167 if (co.use_set != 0) { 5168 rt.set = co.use_set - 1; 5169 rt.flags |= IPFW_RCFLAG_SET; 5170 } 5171 if (do_range_cmd(optname, &rt) != 0) { 5172 warn("rule %u: setsockopt(IP_FW_X%s)", 5173 arg, name); 5174 failed = EX_UNAVAILABLE; 5175 } else if (rt.new_set == 0) { 5176 printf("Entry %d not found\n", arg); 5177 failed = EX_UNAVAILABLE; 5178 } else if (!co.do_quiet) 5179 printf("Entry %d %s.\n", arg, 5180 optname == IP_FW_XZERO ? 5181 "cleared" : "logging count reset"); 5182 } else { 5183 errx(EX_USAGE, "invalid rule number ``%s''", *av); 5184 } 5185 av++; ac--; 5186 } 5187 if (failed != EX_OK) 5188 exit(failed); 5189 } 5190 5191 void 5192 ipfw_flush(int force) 5193 { 5194 ipfw_range_tlv rt; 5195 5196 if (!force && !co.do_quiet) { /* need to ask user */ 5197 int c; 5198 5199 printf("Are you sure? [yn] "); 5200 fflush(stdout); 5201 do { 5202 c = toupper(getc(stdin)); 5203 while (c != '\n' && getc(stdin) != '\n') 5204 if (feof(stdin)) 5205 return; /* and do not flush */ 5206 } while (c != 'Y' && c != 'N'); 5207 printf("\n"); 5208 if (c == 'N') /* user said no */ 5209 return; 5210 } 5211 if (co.do_pipe) { 5212 dummynet_flush(); 5213 return; 5214 } 5215 /* `ipfw set N flush` - is the same that `ipfw delete set N` */ 5216 memset(&rt, 0, sizeof(rt)); 5217 if (co.use_set != 0) { 5218 rt.set = co.use_set - 1; 5219 rt.flags = IPFW_RCFLAG_SET; 5220 } else 5221 rt.flags = IPFW_RCFLAG_ALL; 5222 if (do_range_cmd(IP_FW_XDEL, &rt) != 0) 5223 err(EX_UNAVAILABLE, "setsockopt(IP_FW_XDEL)"); 5224 if (!co.do_quiet) 5225 printf("Flushed all %s.\n", co.do_pipe ? "pipes" : "rules"); 5226 } 5227 5228 static struct _s_x intcmds[] = { 5229 { "talist", TOK_TALIST }, 5230 { "iflist", TOK_IFLIST }, 5231 { "olist", TOK_OLIST }, 5232 { "vlist", TOK_VLIST }, 5233 { NULL, 0 } 5234 }; 5235 5236 static struct _s_x otypes[] = { 5237 { "EACTION", IPFW_TLV_EACTION }, 5238 { "DYNSTATE", IPFW_TLV_STATE_NAME }, 5239 { NULL, 0 } 5240 }; 5241 5242 static const char* 5243 lookup_eaction_name(ipfw_obj_ntlv *ntlv, int cnt, uint16_t type) 5244 { 5245 const char *name; 5246 int i; 5247 5248 name = NULL; 5249 for (i = 0; i < cnt; i++) { 5250 if (ntlv[i].head.type != IPFW_TLV_EACTION) 5251 continue; 5252 if (IPFW_TLV_EACTION_NAME(ntlv[i].idx) != type) 5253 continue; 5254 name = ntlv[i].name; 5255 break; 5256 } 5257 return (name); 5258 } 5259 5260 static void 5261 ipfw_list_objects(int ac, char *av[]) 5262 { 5263 ipfw_obj_lheader req, *olh; 5264 ipfw_obj_ntlv *ntlv; 5265 const char *name; 5266 size_t sz; 5267 int i; 5268 5269 memset(&req, 0, sizeof(req)); 5270 sz = sizeof(req); 5271 if (do_get3(IP_FW_DUMP_SRVOBJECTS, &req.opheader, &sz) != 0) 5272 if (errno != ENOMEM) 5273 return; 5274 5275 sz = req.size; 5276 if ((olh = calloc(1, sz)) == NULL) 5277 return; 5278 5279 olh->size = sz; 5280 if (do_get3(IP_FW_DUMP_SRVOBJECTS, &olh->opheader, &sz) != 0) { 5281 free(olh); 5282 return; 5283 } 5284 5285 if (olh->count > 0) 5286 printf("Objects list:\n"); 5287 else 5288 printf("There are no objects\n"); 5289 ntlv = (ipfw_obj_ntlv *)(olh + 1); 5290 for (i = 0; i < olh->count; i++) { 5291 name = match_value(otypes, ntlv->head.type); 5292 if (name == NULL) 5293 name = lookup_eaction_name( 5294 (ipfw_obj_ntlv *)(olh + 1), olh->count, 5295 ntlv->head.type); 5296 if (name == NULL) 5297 printf(" kidx: %4d\ttype: %10d\tname: %s\n", 5298 ntlv->idx, ntlv->head.type, ntlv->name); 5299 else 5300 printf(" kidx: %4d\ttype: %10s\tname: %s\n", 5301 ntlv->idx, name, ntlv->name); 5302 ntlv++; 5303 } 5304 free(olh); 5305 } 5306 5307 void 5308 ipfw_internal_handler(int ac, char *av[]) 5309 { 5310 int tcmd; 5311 5312 ac--; av++; 5313 NEED1("internal cmd required"); 5314 5315 if ((tcmd = match_token(intcmds, *av)) == -1) 5316 errx(EX_USAGE, "invalid internal sub-cmd: %s", *av); 5317 5318 switch (tcmd) { 5319 case TOK_IFLIST: 5320 ipfw_list_tifaces(); 5321 break; 5322 case TOK_TALIST: 5323 ipfw_list_ta(ac, av); 5324 break; 5325 case TOK_OLIST: 5326 ipfw_list_objects(ac, av); 5327 break; 5328 case TOK_VLIST: 5329 ipfw_list_values(ac, av); 5330 break; 5331 } 5332 } 5333 5334 static int 5335 ipfw_get_tracked_ifaces(ipfw_obj_lheader **polh) 5336 { 5337 ipfw_obj_lheader req, *olh; 5338 size_t sz; 5339 5340 memset(&req, 0, sizeof(req)); 5341 sz = sizeof(req); 5342 5343 if (do_get3(IP_FW_XIFLIST, &req.opheader, &sz) != 0) { 5344 if (errno != ENOMEM) 5345 return (errno); 5346 } 5347 5348 sz = req.size; 5349 if ((olh = calloc(1, sz)) == NULL) 5350 return (ENOMEM); 5351 5352 olh->size = sz; 5353 if (do_get3(IP_FW_XIFLIST, &olh->opheader, &sz) != 0) { 5354 free(olh); 5355 return (errno); 5356 } 5357 5358 *polh = olh; 5359 return (0); 5360 } 5361 5362 static int 5363 ifinfo_cmp(const void *a, const void *b) 5364 { 5365 ipfw_iface_info *ia, *ib; 5366 5367 ia = (ipfw_iface_info *)a; 5368 ib = (ipfw_iface_info *)b; 5369 5370 return (stringnum_cmp(ia->ifname, ib->ifname)); 5371 } 5372 5373 /* 5374 * Retrieves table list from kernel, 5375 * optionally sorts it and calls requested function for each table. 5376 * Returns 0 on success. 5377 */ 5378 static void 5379 ipfw_list_tifaces() 5380 { 5381 ipfw_obj_lheader *olh; 5382 ipfw_iface_info *info; 5383 int i, error; 5384 5385 if ((error = ipfw_get_tracked_ifaces(&olh)) != 0) 5386 err(EX_OSERR, "Unable to request ipfw tracked interface list"); 5387 5388 5389 qsort(olh + 1, olh->count, olh->objsize, ifinfo_cmp); 5390 5391 info = (ipfw_iface_info *)(olh + 1); 5392 for (i = 0; i < olh->count; i++) { 5393 if (info->flags & IPFW_IFFLAG_RESOLVED) 5394 printf("%s ifindex: %d refcount: %u changes: %u\n", 5395 info->ifname, info->ifindex, info->refcnt, 5396 info->gencnt); 5397 else 5398 printf("%s ifindex: unresolved refcount: %u changes: %u\n", 5399 info->ifname, info->refcnt, info->gencnt); 5400 info = (ipfw_iface_info *)((caddr_t)info + olh->objsize); 5401 } 5402 5403 free(olh); 5404 } 5405 5406 5407 5408 5409