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