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 <stdint.h> 40 #include <stdlib.h> 41 #include <string.h> 42 #include <sysexits.h> 43 #include <time.h> /* ctime */ 44 #include <timeconv.h> /* _long_to_time */ 45 #include <unistd.h> 46 #include <fcntl.h> 47 #include <stddef.h> /* offsetof */ 48 49 #include <net/ethernet.h> 50 #include <net/if.h> /* only IFNAMSIZ */ 51 #include <netinet/in.h> 52 #include <netinet/in_systm.h> /* only n_short, n_long */ 53 #include <netinet/ip.h> 54 #include <netinet/ip_icmp.h> 55 #include <netinet/ip_fw.h> 56 #include <netinet/tcp.h> 57 #include <arpa/inet.h> 58 59 struct cmdline_opts co; /* global options */ 60 61 struct format_opts { 62 int bcwidth; 63 int pcwidth; 64 int show_counters; 65 int show_time; /* show timestamp */ 66 uint32_t set_mask; /* enabled sets mask */ 67 uint32_t flags; /* request flags */ 68 uint32_t first; /* first rule to request */ 69 uint32_t last; /* last rule to request */ 70 uint32_t dcnt; /* number of dynamic states */ 71 ipfw_obj_ctlv *tstate; /* table state data */ 72 }; 73 74 int resvd_set_number = RESVD_SET; 75 76 int ipfw_socket = -1; 77 78 #define CHECK_LENGTH(v, len) do { \ 79 if ((v) < (len)) \ 80 errx(EX_DATAERR, "Rule too long"); \ 81 } while (0) 82 /* 83 * Check if we have enough space in cmd buffer. Note that since 84 * first 8? u32 words are reserved by reserved header, full cmd 85 * buffer can't be used, so we need to protect from buffer overrun 86 * only. At the beginning, cblen is less than actual buffer size by 87 * size of ipfw_insn_u32 instruction + 1 u32 work. This eliminates need 88 * for checking small instructions fitting in given range. 89 * We also (ab)use the fact that ipfw_insn is always the first field 90 * for any custom instruction. 91 */ 92 #define CHECK_CMDLEN CHECK_LENGTH(cblen, F_LEN((ipfw_insn *)cmd)) 93 94 #define GET_UINT_ARG(arg, min, max, tok, s_x) do { \ 95 if (!av[0]) \ 96 errx(EX_USAGE, "%s: missing argument", match_value(s_x, tok)); \ 97 if (_substrcmp(*av, "tablearg") == 0) { \ 98 arg = IP_FW_TARG; \ 99 break; \ 100 } \ 101 \ 102 { \ 103 long _xval; \ 104 char *end; \ 105 \ 106 _xval = strtol(*av, &end, 10); \ 107 \ 108 if (!isdigit(**av) || *end != '\0' || (_xval == 0 && errno == EINVAL)) \ 109 errx(EX_DATAERR, "%s: invalid argument: %s", \ 110 match_value(s_x, tok), *av); \ 111 \ 112 if (errno == ERANGE || _xval < min || _xval > max) \ 113 errx(EX_DATAERR, "%s: argument is out of range (%u..%u): %s", \ 114 match_value(s_x, tok), min, max, *av); \ 115 \ 116 if (_xval == IP_FW_TARG) \ 117 errx(EX_DATAERR, "%s: illegal argument value: %s", \ 118 match_value(s_x, tok), *av); \ 119 arg = _xval; \ 120 } \ 121 } while (0) 122 123 static struct _s_x f_tcpflags[] = { 124 { "syn", TH_SYN }, 125 { "fin", TH_FIN }, 126 { "ack", TH_ACK }, 127 { "psh", TH_PUSH }, 128 { "rst", TH_RST }, 129 { "urg", TH_URG }, 130 { "tcp flag", 0 }, 131 { NULL, 0 } 132 }; 133 134 static struct _s_x f_tcpopts[] = { 135 { "mss", IP_FW_TCPOPT_MSS }, 136 { "maxseg", IP_FW_TCPOPT_MSS }, 137 { "window", IP_FW_TCPOPT_WINDOW }, 138 { "sack", IP_FW_TCPOPT_SACK }, 139 { "ts", IP_FW_TCPOPT_TS }, 140 { "timestamp", IP_FW_TCPOPT_TS }, 141 { "cc", IP_FW_TCPOPT_CC }, 142 { "tcp option", 0 }, 143 { NULL, 0 } 144 }; 145 146 /* 147 * IP options span the range 0 to 255 so we need to remap them 148 * (though in fact only the low 5 bits are significant). 149 */ 150 static struct _s_x f_ipopts[] = { 151 { "ssrr", IP_FW_IPOPT_SSRR}, 152 { "lsrr", IP_FW_IPOPT_LSRR}, 153 { "rr", IP_FW_IPOPT_RR}, 154 { "ts", IP_FW_IPOPT_TS}, 155 { "ip option", 0 }, 156 { NULL, 0 } 157 }; 158 159 static struct _s_x f_iptos[] = { 160 { "lowdelay", IPTOS_LOWDELAY}, 161 { "throughput", IPTOS_THROUGHPUT}, 162 { "reliability", IPTOS_RELIABILITY}, 163 { "mincost", IPTOS_MINCOST}, 164 { "congestion", IPTOS_ECN_CE}, 165 { "ecntransport", IPTOS_ECN_ECT0}, 166 { "ip tos option", 0}, 167 { NULL, 0 } 168 }; 169 170 struct _s_x f_ipdscp[] = { 171 { "af11", IPTOS_DSCP_AF11 >> 2 }, /* 001010 */ 172 { "af12", IPTOS_DSCP_AF12 >> 2 }, /* 001100 */ 173 { "af13", IPTOS_DSCP_AF13 >> 2 }, /* 001110 */ 174 { "af21", IPTOS_DSCP_AF21 >> 2 }, /* 010010 */ 175 { "af22", IPTOS_DSCP_AF22 >> 2 }, /* 010100 */ 176 { "af23", IPTOS_DSCP_AF23 >> 2 }, /* 010110 */ 177 { "af31", IPTOS_DSCP_AF31 >> 2 }, /* 011010 */ 178 { "af32", IPTOS_DSCP_AF32 >> 2 }, /* 011100 */ 179 { "af33", IPTOS_DSCP_AF33 >> 2 }, /* 011110 */ 180 { "af41", IPTOS_DSCP_AF41 >> 2 }, /* 100010 */ 181 { "af42", IPTOS_DSCP_AF42 >> 2 }, /* 100100 */ 182 { "af43", IPTOS_DSCP_AF43 >> 2 }, /* 100110 */ 183 { "be", IPTOS_DSCP_CS0 >> 2 }, /* 000000 */ 184 { "ef", IPTOS_DSCP_EF >> 2 }, /* 101110 */ 185 { "cs0", IPTOS_DSCP_CS0 >> 2 }, /* 000000 */ 186 { "cs1", IPTOS_DSCP_CS1 >> 2 }, /* 001000 */ 187 { "cs2", IPTOS_DSCP_CS2 >> 2 }, /* 010000 */ 188 { "cs3", IPTOS_DSCP_CS3 >> 2 }, /* 011000 */ 189 { "cs4", IPTOS_DSCP_CS4 >> 2 }, /* 100000 */ 190 { "cs5", IPTOS_DSCP_CS5 >> 2 }, /* 101000 */ 191 { "cs6", IPTOS_DSCP_CS6 >> 2 }, /* 110000 */ 192 { "cs7", IPTOS_DSCP_CS7 >> 2 }, /* 100000 */ 193 { NULL, 0 } 194 }; 195 196 static struct _s_x limit_masks[] = { 197 {"all", DYN_SRC_ADDR|DYN_SRC_PORT|DYN_DST_ADDR|DYN_DST_PORT}, 198 {"src-addr", DYN_SRC_ADDR}, 199 {"src-port", DYN_SRC_PORT}, 200 {"dst-addr", DYN_DST_ADDR}, 201 {"dst-port", DYN_DST_PORT}, 202 {NULL, 0} 203 }; 204 205 /* 206 * we use IPPROTO_ETHERTYPE as a fake protocol id to call the print routines 207 * This is only used in this code. 208 */ 209 #define IPPROTO_ETHERTYPE 0x1000 210 static struct _s_x ether_types[] = { 211 /* 212 * Note, we cannot use "-:&/" in the names because they are field 213 * separators in the type specifications. Also, we use s = NULL as 214 * end-delimiter, because a type of 0 can be legal. 215 */ 216 { "ip", 0x0800 }, 217 { "ipv4", 0x0800 }, 218 { "ipv6", 0x86dd }, 219 { "arp", 0x0806 }, 220 { "rarp", 0x8035 }, 221 { "vlan", 0x8100 }, 222 { "loop", 0x9000 }, 223 { "trail", 0x1000 }, 224 { "at", 0x809b }, 225 { "atalk", 0x809b }, 226 { "aarp", 0x80f3 }, 227 { "pppoe_disc", 0x8863 }, 228 { "pppoe_sess", 0x8864 }, 229 { "ipx_8022", 0x00E0 }, 230 { "ipx_8023", 0x0000 }, 231 { "ipx_ii", 0x8137 }, 232 { "ipx_snap", 0x8137 }, 233 { "ipx", 0x8137 }, 234 { "ns", 0x0600 }, 235 { NULL, 0 } 236 }; 237 238 static struct _s_x rule_eactions[] = { 239 { "nat64lsn", TOK_NAT64LSN }, 240 { "nat64stl", TOK_NAT64STL }, 241 { "nptv6", TOK_NPTV6 }, 242 { "tcp-setmss", TOK_TCPSETMSS }, 243 { NULL, 0 } /* terminator */ 244 }; 245 246 static struct _s_x rule_actions[] = { 247 { "abort6", TOK_ABORT6 }, 248 { "abort", TOK_ABORT }, 249 { "accept", TOK_ACCEPT }, 250 { "pass", TOK_ACCEPT }, 251 { "allow", TOK_ACCEPT }, 252 { "permit", TOK_ACCEPT }, 253 { "count", TOK_COUNT }, 254 { "pipe", TOK_PIPE }, 255 { "queue", TOK_QUEUE }, 256 { "divert", TOK_DIVERT }, 257 { "tee", TOK_TEE }, 258 { "netgraph", TOK_NETGRAPH }, 259 { "ngtee", TOK_NGTEE }, 260 { "fwd", TOK_FORWARD }, 261 { "forward", TOK_FORWARD }, 262 { "skipto", TOK_SKIPTO }, 263 { "deny", TOK_DENY }, 264 { "drop", TOK_DENY }, 265 { "reject", TOK_REJECT }, 266 { "reset6", TOK_RESET6 }, 267 { "reset", TOK_RESET }, 268 { "unreach6", TOK_UNREACH6 }, 269 { "unreach", TOK_UNREACH }, 270 { "check-state", TOK_CHECKSTATE }, 271 { "//", TOK_COMMENT }, 272 { "nat", TOK_NAT }, 273 { "reass", TOK_REASS }, 274 { "setfib", TOK_SETFIB }, 275 { "setdscp", TOK_SETDSCP }, 276 { "call", TOK_CALL }, 277 { "return", TOK_RETURN }, 278 { "eaction", TOK_EACTION }, 279 { "tcp-setmss", TOK_TCPSETMSS }, 280 { NULL, 0 } /* terminator */ 281 }; 282 283 static struct _s_x rule_action_params[] = { 284 { "altq", TOK_ALTQ }, 285 { "log", TOK_LOG }, 286 { "tag", TOK_TAG }, 287 { "untag", TOK_UNTAG }, 288 { NULL, 0 } /* terminator */ 289 }; 290 291 /* 292 * The 'lookup' instruction accepts one of the following arguments. 293 * -1 is a terminator for the list. 294 * Arguments are passed as v[1] in O_DST_LOOKUP options. 295 */ 296 static int lookup_key[] = { 297 TOK_DSTIP, TOK_SRCIP, TOK_DSTPORT, TOK_SRCPORT, 298 TOK_UID, TOK_JAIL, TOK_DSCP, -1 }; 299 300 static struct _s_x rule_options[] = { 301 { "tagged", TOK_TAGGED }, 302 { "uid", TOK_UID }, 303 { "gid", TOK_GID }, 304 { "jail", TOK_JAIL }, 305 { "in", TOK_IN }, 306 { "limit", TOK_LIMIT }, 307 { "keep-state", TOK_KEEPSTATE }, 308 { "bridged", TOK_LAYER2 }, 309 { "layer2", TOK_LAYER2 }, 310 { "out", TOK_OUT }, 311 { "diverted", TOK_DIVERTED }, 312 { "diverted-loopback", TOK_DIVERTEDLOOPBACK }, 313 { "diverted-output", TOK_DIVERTEDOUTPUT }, 314 { "xmit", TOK_XMIT }, 315 { "recv", TOK_RECV }, 316 { "via", TOK_VIA }, 317 { "fragment", TOK_FRAG }, 318 { "frag", TOK_FRAG }, 319 { "fib", TOK_FIB }, 320 { "ipoptions", TOK_IPOPTS }, 321 { "ipopts", TOK_IPOPTS }, 322 { "iplen", TOK_IPLEN }, 323 { "ipid", TOK_IPID }, 324 { "ipprecedence", TOK_IPPRECEDENCE }, 325 { "dscp", TOK_DSCP }, 326 { "iptos", TOK_IPTOS }, 327 { "ipttl", TOK_IPTTL }, 328 { "ipversion", TOK_IPVER }, 329 { "ipver", TOK_IPVER }, 330 { "estab", TOK_ESTAB }, 331 { "established", TOK_ESTAB }, 332 { "setup", TOK_SETUP }, 333 { "sockarg", TOK_SOCKARG }, 334 { "tcpdatalen", TOK_TCPDATALEN }, 335 { "tcpflags", TOK_TCPFLAGS }, 336 { "tcpflgs", TOK_TCPFLAGS }, 337 { "tcpoptions", TOK_TCPOPTS }, 338 { "tcpopts", TOK_TCPOPTS }, 339 { "tcpseq", TOK_TCPSEQ }, 340 { "tcpack", TOK_TCPACK }, 341 { "tcpwin", TOK_TCPWIN }, 342 { "icmptype", TOK_ICMPTYPES }, 343 { "icmptypes", TOK_ICMPTYPES }, 344 { "dst-ip", TOK_DSTIP }, 345 { "src-ip", TOK_SRCIP }, 346 { "dst-port", TOK_DSTPORT }, 347 { "src-port", TOK_SRCPORT }, 348 { "proto", TOK_PROTO }, 349 { "MAC", TOK_MAC }, 350 { "mac", TOK_MAC }, 351 { "mac-type", TOK_MACTYPE }, 352 { "verrevpath", TOK_VERREVPATH }, 353 { "versrcreach", TOK_VERSRCREACH }, 354 { "antispoof", TOK_ANTISPOOF }, 355 { "ipsec", TOK_IPSEC }, 356 { "icmp6type", TOK_ICMP6TYPES }, 357 { "icmp6types", TOK_ICMP6TYPES }, 358 { "ext6hdr", TOK_EXT6HDR}, 359 { "flow-id", TOK_FLOWID}, 360 { "ipv6", TOK_IPV6}, 361 { "ip6", TOK_IPV6}, 362 { "ipv4", TOK_IPV4}, 363 { "ip4", TOK_IPV4}, 364 { "dst-ipv6", TOK_DSTIP6}, 365 { "dst-ip6", TOK_DSTIP6}, 366 { "src-ipv6", TOK_SRCIP6}, 367 { "src-ip6", TOK_SRCIP6}, 368 { "lookup", TOK_LOOKUP}, 369 { "flow", TOK_FLOW}, 370 { "//", TOK_COMMENT }, 371 372 { "not", TOK_NOT }, /* pseudo option */ 373 { "!", /* escape ? */ TOK_NOT }, /* pseudo option */ 374 { "or", TOK_OR }, /* pseudo option */ 375 { "|", /* escape */ TOK_OR }, /* pseudo option */ 376 { "{", TOK_STARTBRACE }, /* pseudo option */ 377 { "(", TOK_STARTBRACE }, /* pseudo option */ 378 { "}", TOK_ENDBRACE }, /* pseudo option */ 379 { ")", TOK_ENDBRACE }, /* pseudo option */ 380 { NULL, 0 } /* terminator */ 381 }; 382 383 void bprint_uint_arg(struct buf_pr *bp, const char *str, uint32_t arg); 384 static int ipfw_get_config(struct cmdline_opts *co, struct format_opts *fo, 385 ipfw_cfg_lheader **pcfg, size_t *psize); 386 static int ipfw_show_config(struct cmdline_opts *co, struct format_opts *fo, 387 ipfw_cfg_lheader *cfg, size_t sz, int ac, char **av); 388 static void ipfw_list_tifaces(void); 389 390 struct tidx; 391 static uint16_t pack_object(struct tidx *tstate, char *name, int otype); 392 static uint16_t pack_table(struct tidx *tstate, char *name); 393 394 static char *table_search_ctlv(ipfw_obj_ctlv *ctlv, uint16_t idx); 395 static void object_sort_ctlv(ipfw_obj_ctlv *ctlv); 396 static char *object_search_ctlv(ipfw_obj_ctlv *ctlv, uint16_t idx, 397 uint16_t type); 398 399 /* 400 * Simple string buffer API. 401 * Used to simplify buffer passing between function and for 402 * transparent overrun handling. 403 */ 404 405 /* 406 * Allocates new buffer of given size @sz. 407 * 408 * Returns 0 on success. 409 */ 410 int 411 bp_alloc(struct buf_pr *b, size_t size) 412 { 413 memset(b, 0, sizeof(struct buf_pr)); 414 415 if ((b->buf = calloc(1, size)) == NULL) 416 return (ENOMEM); 417 418 b->ptr = b->buf; 419 b->size = size; 420 b->avail = b->size; 421 422 return (0); 423 } 424 425 void 426 bp_free(struct buf_pr *b) 427 { 428 429 free(b->buf); 430 } 431 432 /* 433 * Flushes buffer so new writer start from beginning. 434 */ 435 void 436 bp_flush(struct buf_pr *b) 437 { 438 439 b->ptr = b->buf; 440 b->avail = b->size; 441 b->buf[0] = '\0'; 442 } 443 444 /* 445 * Print message specified by @format and args. 446 * Automatically manage buffer space and transparently handle 447 * buffer overruns. 448 * 449 * Returns number of bytes that should have been printed. 450 */ 451 int 452 bprintf(struct buf_pr *b, char *format, ...) 453 { 454 va_list args; 455 int i; 456 457 va_start(args, format); 458 459 i = vsnprintf(b->ptr, b->avail, format, args); 460 va_end(args); 461 462 if (i > b->avail || i < 0) { 463 /* Overflow or print error */ 464 b->avail = 0; 465 } else { 466 b->ptr += i; 467 b->avail -= i; 468 } 469 470 b->needed += i; 471 472 return (i); 473 } 474 475 /* 476 * Special values printer for tablearg-aware opcodes. 477 */ 478 void 479 bprint_uint_arg(struct buf_pr *bp, const char *str, uint32_t arg) 480 { 481 482 if (str != NULL) 483 bprintf(bp, "%s", str); 484 if (arg == IP_FW_TARG) 485 bprintf(bp, "tablearg"); 486 else 487 bprintf(bp, "%u", arg); 488 } 489 490 /* 491 * Helper routine to print a possibly unaligned uint64_t on 492 * various platform. If width > 0, print the value with 493 * the desired width, followed by a space; 494 * otherwise, return the required width. 495 */ 496 int 497 pr_u64(struct buf_pr *b, uint64_t *pd, int width) 498 { 499 #ifdef TCC 500 #define U64_FMT "I64" 501 #else 502 #define U64_FMT "llu" 503 #endif 504 uint64_t u; 505 unsigned long long d; 506 507 bcopy (pd, &u, sizeof(u)); 508 d = u; 509 return (width > 0) ? 510 bprintf(b, "%*" U64_FMT " ", width, d) : 511 snprintf(NULL, 0, "%" U64_FMT, d) ; 512 #undef U64_FMT 513 } 514 515 516 void * 517 safe_calloc(size_t number, size_t size) 518 { 519 void *ret = calloc(number, size); 520 521 if (ret == NULL) 522 err(EX_OSERR, "calloc"); 523 return ret; 524 } 525 526 void * 527 safe_realloc(void *ptr, size_t size) 528 { 529 void *ret = realloc(ptr, size); 530 531 if (ret == NULL) 532 err(EX_OSERR, "realloc"); 533 return ret; 534 } 535 536 /* 537 * Compare things like interface or table names. 538 */ 539 int 540 stringnum_cmp(const char *a, const char *b) 541 { 542 int la, lb; 543 544 la = strlen(a); 545 lb = strlen(b); 546 547 if (la > lb) 548 return (1); 549 else if (la < lb) 550 return (-01); 551 552 return (strcmp(a, b)); 553 } 554 555 556 /* 557 * conditionally runs the command. 558 * Selected options or negative -> getsockopt 559 */ 560 int 561 do_cmd(int optname, void *optval, uintptr_t optlen) 562 { 563 int i; 564 565 if (co.test_only) 566 return 0; 567 568 if (ipfw_socket == -1) 569 ipfw_socket = socket(AF_INET, SOCK_RAW, IPPROTO_RAW); 570 if (ipfw_socket < 0) 571 err(EX_UNAVAILABLE, "socket"); 572 573 if (optname == IP_FW_GET || optname == IP_DUMMYNET_GET || 574 optname == IP_FW_ADD || optname == IP_FW3 || 575 optname == IP_FW_NAT_GET_CONFIG || 576 optname < 0 || 577 optname == IP_FW_NAT_GET_LOG) { 578 if (optname < 0) 579 optname = -optname; 580 i = getsockopt(ipfw_socket, IPPROTO_IP, optname, optval, 581 (socklen_t *)optlen); 582 } else { 583 i = setsockopt(ipfw_socket, IPPROTO_IP, optname, optval, optlen); 584 } 585 return i; 586 } 587 588 /* 589 * do_set3 - pass ipfw control cmd to kernel 590 * @optname: option name 591 * @optval: pointer to option data 592 * @optlen: option length 593 * 594 * Assumes op3 header is already embedded. 595 * Calls setsockopt() with IP_FW3 as kernel-visible opcode. 596 * Returns 0 on success or errno otherwise. 597 */ 598 int 599 do_set3(int optname, ip_fw3_opheader *op3, size_t optlen) 600 { 601 602 if (co.test_only) 603 return (0); 604 605 if (ipfw_socket == -1) 606 ipfw_socket = socket(AF_INET, SOCK_RAW, IPPROTO_RAW); 607 if (ipfw_socket < 0) 608 err(EX_UNAVAILABLE, "socket"); 609 610 op3->opcode = optname; 611 612 return (setsockopt(ipfw_socket, IPPROTO_IP, IP_FW3, op3, optlen)); 613 } 614 615 /* 616 * do_get3 - pass ipfw control cmd to kernel 617 * @optname: option name 618 * @optval: pointer to option data 619 * @optlen: pointer to option length 620 * 621 * Assumes op3 header is already embedded. 622 * Calls getsockopt() with IP_FW3 as kernel-visible opcode. 623 * Returns 0 on success or errno otherwise. 624 */ 625 int 626 do_get3(int optname, ip_fw3_opheader *op3, size_t *optlen) 627 { 628 int error; 629 socklen_t len; 630 631 if (co.test_only) 632 return (0); 633 634 if (ipfw_socket == -1) 635 ipfw_socket = socket(AF_INET, SOCK_RAW, IPPROTO_RAW); 636 if (ipfw_socket < 0) 637 err(EX_UNAVAILABLE, "socket"); 638 639 op3->opcode = optname; 640 641 len = *optlen; 642 error = getsockopt(ipfw_socket, IPPROTO_IP, IP_FW3, op3, &len); 643 *optlen = len; 644 645 return (error); 646 } 647 648 /** 649 * match_token takes a table and a string, returns the value associated 650 * with the string (-1 in case of failure). 651 */ 652 int 653 match_token(struct _s_x *table, const char *string) 654 { 655 struct _s_x *pt; 656 uint i = strlen(string); 657 658 for (pt = table ; i && pt->s != NULL ; pt++) 659 if (strlen(pt->s) == i && !bcmp(string, pt->s, i)) 660 return pt->x; 661 return (-1); 662 } 663 664 /** 665 * match_token_relaxed takes a table and a string, returns the value associated 666 * with the string for the best match. 667 * 668 * Returns: 669 * value from @table for matched records 670 * -1 for non-matched records 671 * -2 if more than one records match @string. 672 */ 673 int 674 match_token_relaxed(struct _s_x *table, const char *string) 675 { 676 struct _s_x *pt, *m; 677 int i, c; 678 679 i = strlen(string); 680 c = 0; 681 682 for (pt = table ; i != 0 && pt->s != NULL ; pt++) { 683 if (strncmp(pt->s, string, i) != 0) 684 continue; 685 m = pt; 686 c++; 687 } 688 689 if (c == 1) 690 return (m->x); 691 692 return (c > 0 ? -2: -1); 693 } 694 695 int 696 get_token(struct _s_x *table, const char *string, const char *errbase) 697 { 698 int tcmd; 699 700 if ((tcmd = match_token_relaxed(table, string)) < 0) 701 errx(EX_USAGE, "%s %s %s", 702 (tcmd == 0) ? "invalid" : "ambiguous", errbase, string); 703 704 return (tcmd); 705 } 706 707 /** 708 * match_value takes a table and a value, returns the string associated 709 * with the value (NULL in case of failure). 710 */ 711 char const * 712 match_value(struct _s_x *p, int value) 713 { 714 for (; p->s != NULL; p++) 715 if (p->x == value) 716 return p->s; 717 return NULL; 718 } 719 720 size_t 721 concat_tokens(char *buf, size_t bufsize, struct _s_x *table, char *delimiter) 722 { 723 struct _s_x *pt; 724 int l; 725 size_t sz; 726 727 for (sz = 0, pt = table ; pt->s != NULL; pt++) { 728 l = snprintf(buf + sz, bufsize - sz, "%s%s", 729 (sz == 0) ? "" : delimiter, pt->s); 730 sz += l; 731 bufsize += l; 732 if (sz > bufsize) 733 return (bufsize); 734 } 735 736 return (sz); 737 } 738 739 /* 740 * helper function to process a set of flags and set bits in the 741 * appropriate masks. 742 */ 743 int 744 fill_flags(struct _s_x *flags, char *p, char **e, uint32_t *set, 745 uint32_t *clear) 746 { 747 char *q; /* points to the separator */ 748 int val; 749 uint32_t *which; /* mask we are working on */ 750 751 while (p && *p) { 752 if (*p == '!') { 753 p++; 754 which = clear; 755 } else 756 which = set; 757 q = strchr(p, ','); 758 if (q) 759 *q++ = '\0'; 760 val = match_token(flags, p); 761 if (val <= 0) { 762 if (e != NULL) 763 *e = p; 764 return (-1); 765 } 766 *which |= (uint32_t)val; 767 p = q; 768 } 769 return (0); 770 } 771 772 void 773 print_flags_buffer(char *buf, size_t sz, struct _s_x *list, uint32_t set) 774 { 775 char const *comma = ""; 776 int i, l; 777 778 for (i = 0; list[i].x != 0; i++) { 779 if ((set & list[i].x) == 0) 780 continue; 781 782 set &= ~list[i].x; 783 l = snprintf(buf, sz, "%s%s", comma, list[i].s); 784 if (l >= sz) 785 return; 786 comma = ","; 787 buf += l; 788 sz -=l; 789 } 790 } 791 792 /* 793 * _substrcmp takes two strings and returns 1 if they do not match, 794 * and 0 if they match exactly or the first string is a sub-string 795 * of the second. A warning is printed to stderr in the case that the 796 * first string is a sub-string of the second. 797 * 798 * This function will be removed in the future through the usual 799 * deprecation process. 800 */ 801 int 802 _substrcmp(const char *str1, const char* str2) 803 { 804 805 if (strncmp(str1, str2, strlen(str1)) != 0) 806 return 1; 807 808 if (strlen(str1) != strlen(str2)) 809 warnx("DEPRECATED: '%s' matched '%s' as a sub-string", 810 str1, str2); 811 return 0; 812 } 813 814 /* 815 * _substrcmp2 takes three strings and returns 1 if the first two do not match, 816 * and 0 if they match exactly or the second string is a sub-string 817 * of the first. A warning is printed to stderr in the case that the 818 * first string does not match the third. 819 * 820 * This function exists to warn about the bizarre construction 821 * strncmp(str, "by", 2) which is used to allow people to use a shortcut 822 * for "bytes". The problem is that in addition to accepting "by", 823 * "byt", "byte", and "bytes", it also excepts "by_rabid_dogs" and any 824 * other string beginning with "by". 825 * 826 * This function will be removed in the future through the usual 827 * deprecation process. 828 */ 829 int 830 _substrcmp2(const char *str1, const char* str2, const char* str3) 831 { 832 833 if (strncmp(str1, str2, strlen(str2)) != 0) 834 return 1; 835 836 if (strcmp(str1, str3) != 0) 837 warnx("DEPRECATED: '%s' matched '%s'", 838 str1, str3); 839 return 0; 840 } 841 842 /* 843 * prints one port, symbolic or numeric 844 */ 845 static void 846 print_port(struct buf_pr *bp, int proto, uint16_t port) 847 { 848 849 if (proto == IPPROTO_ETHERTYPE) { 850 char const *s; 851 852 if (co.do_resolv && (s = match_value(ether_types, port)) ) 853 bprintf(bp, "%s", s); 854 else 855 bprintf(bp, "0x%04x", port); 856 } else { 857 struct servent *se = NULL; 858 if (co.do_resolv) { 859 struct protoent *pe = getprotobynumber(proto); 860 861 se = getservbyport(htons(port), pe ? pe->p_name : NULL); 862 } 863 if (se) 864 bprintf(bp, "%s", se->s_name); 865 else 866 bprintf(bp, "%d", port); 867 } 868 } 869 870 static struct _s_x _port_name[] = { 871 {"dst-port", O_IP_DSTPORT}, 872 {"src-port", O_IP_SRCPORT}, 873 {"ipid", O_IPID}, 874 {"iplen", O_IPLEN}, 875 {"ipttl", O_IPTTL}, 876 {"mac-type", O_MAC_TYPE}, 877 {"tcpdatalen", O_TCPDATALEN}, 878 {"tcpwin", O_TCPWIN}, 879 {"tagged", O_TAGGED}, 880 {NULL, 0} 881 }; 882 883 /* 884 * Print the values in a list 16-bit items of the types above. 885 * XXX todo: add support for mask. 886 */ 887 static void 888 print_newports(struct buf_pr *bp, ipfw_insn_u16 *cmd, int proto, int opcode) 889 { 890 uint16_t *p = cmd->ports; 891 int i; 892 char const *sep; 893 894 if (opcode != 0) { 895 sep = match_value(_port_name, opcode); 896 if (sep == NULL) 897 sep = "???"; 898 bprintf(bp, " %s", sep); 899 } 900 sep = " "; 901 for (i = F_LEN((ipfw_insn *)cmd) - 1; i > 0; i--, p += 2) { 902 bprintf(bp, "%s", sep); 903 print_port(bp, proto, p[0]); 904 if (p[0] != p[1]) { 905 bprintf(bp, "-"); 906 print_port(bp, proto, p[1]); 907 } 908 sep = ","; 909 } 910 } 911 912 /* 913 * Like strtol, but also translates service names into port numbers 914 * for some protocols. 915 * In particular: 916 * proto == -1 disables the protocol check; 917 * proto == IPPROTO_ETHERTYPE looks up an internal table 918 * proto == <some value in /etc/protocols> matches the values there. 919 * Returns *end == s in case the parameter is not found. 920 */ 921 static int 922 strtoport(char *s, char **end, int base, int proto) 923 { 924 char *p, *buf; 925 char *s1; 926 int i; 927 928 *end = s; /* default - not found */ 929 if (*s == '\0') 930 return 0; /* not found */ 931 932 if (isdigit(*s)) 933 return strtol(s, end, base); 934 935 /* 936 * find separator. '\\' escapes the next char. 937 */ 938 for (s1 = s; *s1 && (isalnum(*s1) || *s1 == '\\') ; s1++) 939 if (*s1 == '\\' && s1[1] != '\0') 940 s1++; 941 942 buf = safe_calloc(s1 - s + 1, 1); 943 944 /* 945 * copy into a buffer skipping backslashes 946 */ 947 for (p = s, i = 0; p != s1 ; p++) 948 if (*p != '\\') 949 buf[i++] = *p; 950 buf[i++] = '\0'; 951 952 if (proto == IPPROTO_ETHERTYPE) { 953 i = match_token(ether_types, buf); 954 free(buf); 955 if (i != -1) { /* found */ 956 *end = s1; 957 return i; 958 } 959 } else { 960 struct protoent *pe = NULL; 961 struct servent *se; 962 963 if (proto != 0) 964 pe = getprotobynumber(proto); 965 setservent(1); 966 se = getservbyname(buf, pe ? pe->p_name : NULL); 967 free(buf); 968 if (se != NULL) { 969 *end = s1; 970 return ntohs(se->s_port); 971 } 972 } 973 return 0; /* not found */ 974 } 975 976 /* 977 * Fill the body of the command with the list of port ranges. 978 */ 979 static int 980 fill_newports(ipfw_insn_u16 *cmd, char *av, int proto, int cblen) 981 { 982 uint16_t a, b, *p = cmd->ports; 983 int i = 0; 984 char *s = av; 985 986 while (*s) { 987 a = strtoport(av, &s, 0, proto); 988 if (s == av) /* empty or invalid argument */ 989 return (0); 990 991 CHECK_LENGTH(cblen, i + 2); 992 993 switch (*s) { 994 case '-': /* a range */ 995 av = s + 1; 996 b = strtoport(av, &s, 0, proto); 997 /* Reject expressions like '1-abc' or '1-2-3'. */ 998 if (s == av || (*s != ',' && *s != '\0')) 999 return (0); 1000 p[0] = a; 1001 p[1] = b; 1002 break; 1003 case ',': /* comma separated list */ 1004 case '\0': 1005 p[0] = p[1] = a; 1006 break; 1007 default: 1008 warnx("port list: invalid separator <%c> in <%s>", 1009 *s, av); 1010 return (0); 1011 } 1012 1013 i++; 1014 p += 2; 1015 av = s + 1; 1016 } 1017 if (i > 0) { 1018 if (i + 1 > F_LEN_MASK) 1019 errx(EX_DATAERR, "too many ports/ranges\n"); 1020 cmd->o.len |= i + 1; /* leave F_NOT and F_OR untouched */ 1021 } 1022 return (i); 1023 } 1024 1025 /* 1026 * Fill the body of the command with the list of DiffServ codepoints. 1027 */ 1028 static void 1029 fill_dscp(ipfw_insn *cmd, char *av, int cblen) 1030 { 1031 uint32_t *low, *high; 1032 char *s = av, *a; 1033 int code; 1034 1035 cmd->opcode = O_DSCP; 1036 cmd->len |= F_INSN_SIZE(ipfw_insn_u32) + 1; 1037 1038 CHECK_CMDLEN; 1039 1040 low = (uint32_t *)(cmd + 1); 1041 high = low + 1; 1042 1043 *low = 0; 1044 *high = 0; 1045 1046 while (s != NULL) { 1047 a = strchr(s, ','); 1048 1049 if (a != NULL) 1050 *a++ = '\0'; 1051 1052 if (isalpha(*s)) { 1053 if ((code = match_token(f_ipdscp, s)) == -1) 1054 errx(EX_DATAERR, "Unknown DSCP code"); 1055 } else { 1056 code = strtoul(s, NULL, 10); 1057 if (code < 0 || code > 63) 1058 errx(EX_DATAERR, "Invalid DSCP value"); 1059 } 1060 1061 if (code >= 32) 1062 *high |= 1 << (code - 32); 1063 else 1064 *low |= 1 << code; 1065 1066 s = a; 1067 } 1068 } 1069 1070 static struct _s_x icmpcodes[] = { 1071 { "net", ICMP_UNREACH_NET }, 1072 { "host", ICMP_UNREACH_HOST }, 1073 { "protocol", ICMP_UNREACH_PROTOCOL }, 1074 { "port", ICMP_UNREACH_PORT }, 1075 { "needfrag", ICMP_UNREACH_NEEDFRAG }, 1076 { "srcfail", ICMP_UNREACH_SRCFAIL }, 1077 { "net-unknown", ICMP_UNREACH_NET_UNKNOWN }, 1078 { "host-unknown", ICMP_UNREACH_HOST_UNKNOWN }, 1079 { "isolated", ICMP_UNREACH_ISOLATED }, 1080 { "net-prohib", ICMP_UNREACH_NET_PROHIB }, 1081 { "host-prohib", ICMP_UNREACH_HOST_PROHIB }, 1082 { "tosnet", ICMP_UNREACH_TOSNET }, 1083 { "toshost", ICMP_UNREACH_TOSHOST }, 1084 { "filter-prohib", ICMP_UNREACH_FILTER_PROHIB }, 1085 { "host-precedence", ICMP_UNREACH_HOST_PRECEDENCE }, 1086 { "precedence-cutoff", ICMP_UNREACH_PRECEDENCE_CUTOFF }, 1087 { NULL, 0 } 1088 }; 1089 1090 static void 1091 fill_reject_code(u_short *codep, char *str) 1092 { 1093 int val; 1094 char *s; 1095 1096 val = strtoul(str, &s, 0); 1097 if (s == str || *s != '\0' || val >= 0x100) 1098 val = match_token(icmpcodes, str); 1099 if (val < 0) 1100 errx(EX_DATAERR, "unknown ICMP unreachable code ``%s''", str); 1101 *codep = val; 1102 return; 1103 } 1104 1105 static void 1106 print_reject_code(struct buf_pr *bp, uint16_t code) 1107 { 1108 char const *s; 1109 1110 if ((s = match_value(icmpcodes, code)) != NULL) 1111 bprintf(bp, "unreach %s", s); 1112 else 1113 bprintf(bp, "unreach %u", code); 1114 } 1115 1116 /* 1117 * Returns the number of bits set (from left) in a contiguous bitmask, 1118 * or -1 if the mask is not contiguous. 1119 * XXX this needs a proper fix. 1120 * This effectively works on masks in big-endian (network) format. 1121 * when compiled on little endian architectures. 1122 * 1123 * First bit is bit 7 of the first byte -- note, for MAC addresses, 1124 * the first bit on the wire is bit 0 of the first byte. 1125 * len is the max length in bits. 1126 */ 1127 int 1128 contigmask(uint8_t *p, int len) 1129 { 1130 int i, n; 1131 1132 for (i=0; i<len ; i++) 1133 if ( (p[i/8] & (1 << (7 - (i%8)))) == 0) /* first bit unset */ 1134 break; 1135 for (n=i+1; n < len; n++) 1136 if ( (p[n/8] & (1 << (7 - (n%8)))) != 0) 1137 return -1; /* mask not contiguous */ 1138 return i; 1139 } 1140 1141 /* 1142 * print flags set/clear in the two bitmasks passed as parameters. 1143 * There is a specialized check for f_tcpflags. 1144 */ 1145 static void 1146 print_flags(struct buf_pr *bp, char const *name, ipfw_insn *cmd, 1147 struct _s_x *list) 1148 { 1149 char const *comma = ""; 1150 int i; 1151 uint8_t set = cmd->arg1 & 0xff; 1152 uint8_t clear = (cmd->arg1 >> 8) & 0xff; 1153 1154 if (list == f_tcpflags && set == TH_SYN && clear == TH_ACK) { 1155 bprintf(bp, " setup"); 1156 return; 1157 } 1158 1159 bprintf(bp, " %s ", name); 1160 for (i=0; list[i].x != 0; i++) { 1161 if (set & list[i].x) { 1162 set &= ~list[i].x; 1163 bprintf(bp, "%s%s", comma, list[i].s); 1164 comma = ","; 1165 } 1166 if (clear & list[i].x) { 1167 clear &= ~list[i].x; 1168 bprintf(bp, "%s!%s", comma, list[i].s); 1169 comma = ","; 1170 } 1171 } 1172 } 1173 1174 1175 /* 1176 * Print the ip address contained in a command. 1177 */ 1178 static void 1179 print_ip(struct buf_pr *bp, struct format_opts *fo, ipfw_insn_ip *cmd, 1180 char const *s) 1181 { 1182 struct hostent *he = NULL; 1183 struct in_addr *ia; 1184 uint32_t len = F_LEN((ipfw_insn *)cmd); 1185 uint32_t *a = ((ipfw_insn_u32 *)cmd)->d; 1186 char *t; 1187 1188 if (cmd->o.opcode == O_IP_DST_LOOKUP && len > F_INSN_SIZE(ipfw_insn_u32)) { 1189 uint32_t d = a[1]; 1190 const char *arg = "<invalid>"; 1191 1192 if (d < sizeof(lookup_key)/sizeof(lookup_key[0])) 1193 arg = match_value(rule_options, lookup_key[d]); 1194 t = table_search_ctlv(fo->tstate, ((ipfw_insn *)cmd)->arg1); 1195 bprintf(bp, "%s lookup %s %s", cmd->o.len & F_NOT ? " not": "", 1196 arg, t); 1197 return; 1198 } 1199 bprintf(bp, "%s%s ", cmd->o.len & F_NOT ? " not": "", s); 1200 1201 if (cmd->o.opcode == O_IP_SRC_ME || cmd->o.opcode == O_IP_DST_ME) { 1202 bprintf(bp, "me"); 1203 return; 1204 } 1205 if (cmd->o.opcode == O_IP_SRC_LOOKUP || 1206 cmd->o.opcode == O_IP_DST_LOOKUP) { 1207 t = table_search_ctlv(fo->tstate, ((ipfw_insn *)cmd)->arg1); 1208 bprintf(bp, "table(%s", t); 1209 if (len == F_INSN_SIZE(ipfw_insn_u32)) 1210 bprintf(bp, ",%u", *a); 1211 bprintf(bp, ")"); 1212 return; 1213 } 1214 if (cmd->o.opcode == O_IP_SRC_SET || cmd->o.opcode == O_IP_DST_SET) { 1215 uint32_t x, *map = (uint32_t *)&(cmd->mask); 1216 int i, j; 1217 char comma = '{'; 1218 1219 x = cmd->o.arg1 - 1; 1220 x = htonl( ~x ); 1221 cmd->addr.s_addr = htonl(cmd->addr.s_addr); 1222 bprintf(bp, "%s/%d", inet_ntoa(cmd->addr), 1223 contigmask((uint8_t *)&x, 32)); 1224 x = cmd->addr.s_addr = htonl(cmd->addr.s_addr); 1225 x &= 0xff; /* base */ 1226 /* 1227 * Print bits and ranges. 1228 * Locate first bit set (i), then locate first bit unset (j). 1229 * If we have 3+ consecutive bits set, then print them as a 1230 * range, otherwise only print the initial bit and rescan. 1231 */ 1232 for (i=0; i < cmd->o.arg1; i++) 1233 if (map[i/32] & (1<<(i & 31))) { 1234 for (j=i+1; j < cmd->o.arg1; j++) 1235 if (!(map[ j/32] & (1<<(j & 31)))) 1236 break; 1237 bprintf(bp, "%c%d", comma, i+x); 1238 if (j>i+2) { /* range has at least 3 elements */ 1239 bprintf(bp, "-%d", j-1+x); 1240 i = j-1; 1241 } 1242 comma = ','; 1243 } 1244 bprintf(bp, "}"); 1245 return; 1246 } 1247 /* 1248 * len == 2 indicates a single IP, whereas lists of 1 or more 1249 * addr/mask pairs have len = (2n+1). We convert len to n so we 1250 * use that to count the number of entries. 1251 */ 1252 for (len = len / 2; len > 0; len--, a += 2) { 1253 int mb = /* mask length */ 1254 (cmd->o.opcode == O_IP_SRC || cmd->o.opcode == O_IP_DST) ? 1255 32 : contigmask((uint8_t *)&(a[1]), 32); 1256 if (mb == 32 && co.do_resolv) 1257 he = gethostbyaddr((char *)&(a[0]), sizeof(u_long), AF_INET); 1258 if (he != NULL) /* resolved to name */ 1259 bprintf(bp, "%s", he->h_name); 1260 else if (mb == 0) /* any */ 1261 bprintf(bp, "any"); 1262 else { /* numeric IP followed by some kind of mask */ 1263 ia = (struct in_addr *)&a[0]; 1264 bprintf(bp, "%s", inet_ntoa(*ia)); 1265 if (mb < 0) { 1266 ia = (struct in_addr *)&a[1]; 1267 bprintf(bp, ":%s", inet_ntoa(*ia)); 1268 } else if (mb < 32) 1269 bprintf(bp, "/%d", mb); 1270 } 1271 if (len > 1) 1272 bprintf(bp, ","); 1273 } 1274 } 1275 1276 /* 1277 * prints a MAC address/mask pair 1278 */ 1279 static void 1280 print_mac(struct buf_pr *bp, uint8_t *addr, uint8_t *mask) 1281 { 1282 int l = contigmask(mask, 48); 1283 1284 if (l == 0) 1285 bprintf(bp, " any"); 1286 else { 1287 bprintf(bp, " %02x:%02x:%02x:%02x:%02x:%02x", 1288 addr[0], addr[1], addr[2], addr[3], addr[4], addr[5]); 1289 if (l == -1) 1290 bprintf(bp, "&%02x:%02x:%02x:%02x:%02x:%02x", 1291 mask[0], mask[1], mask[2], 1292 mask[3], mask[4], mask[5]); 1293 else if (l < 48) 1294 bprintf(bp, "/%d", l); 1295 } 1296 } 1297 1298 static void 1299 fill_icmptypes(ipfw_insn_u32 *cmd, char *av) 1300 { 1301 uint8_t type; 1302 1303 cmd->d[0] = 0; 1304 while (*av) { 1305 if (*av == ',') 1306 av++; 1307 1308 type = strtoul(av, &av, 0); 1309 1310 if (*av != ',' && *av != '\0') 1311 errx(EX_DATAERR, "invalid ICMP type"); 1312 1313 if (type > 31) 1314 errx(EX_DATAERR, "ICMP type out of range"); 1315 1316 cmd->d[0] |= 1 << type; 1317 } 1318 cmd->o.opcode = O_ICMPTYPE; 1319 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32); 1320 } 1321 1322 static void 1323 print_icmptypes(struct buf_pr *bp, ipfw_insn_u32 *cmd) 1324 { 1325 int i; 1326 char sep= ' '; 1327 1328 bprintf(bp, " icmptypes"); 1329 for (i = 0; i < 32; i++) { 1330 if ( (cmd->d[0] & (1 << (i))) == 0) 1331 continue; 1332 bprintf(bp, "%c%d", sep, i); 1333 sep = ','; 1334 } 1335 } 1336 1337 static void 1338 print_dscp(struct buf_pr *bp, ipfw_insn_u32 *cmd) 1339 { 1340 int i = 0; 1341 uint32_t *v; 1342 char sep= ' '; 1343 const char *code; 1344 1345 bprintf(bp, " dscp"); 1346 v = cmd->d; 1347 while (i < 64) { 1348 if (*v & (1 << i)) { 1349 if ((code = match_value(f_ipdscp, i)) != NULL) 1350 bprintf(bp, "%c%s", sep, code); 1351 else 1352 bprintf(bp, "%c%d", sep, i); 1353 sep = ','; 1354 } 1355 1356 if ((++i % 32) == 0) 1357 v++; 1358 } 1359 } 1360 1361 /* 1362 * show_ipfw() prints the body of an ipfw rule. 1363 * Because the standard rule has at least proto src_ip dst_ip, we use 1364 * a helper function to produce these entries if not provided explicitly. 1365 * The first argument is the list of fields we have, the second is 1366 * the list of fields we want to be printed. 1367 * 1368 * Special cases if we have provided a MAC header: 1369 * + if the rule does not contain IP addresses/ports, do not print them; 1370 * + if the rule does not contain an IP proto, print "all" instead of "ip"; 1371 * 1372 * Once we have 'have_options', IP header fields are printed as options. 1373 */ 1374 #define HAVE_PROTO 0x0001 1375 #define HAVE_SRCIP 0x0002 1376 #define HAVE_DSTIP 0x0004 1377 #define HAVE_PROTO4 0x0008 1378 #define HAVE_PROTO6 0x0010 1379 #define HAVE_IP 0x0100 1380 #define HAVE_OPTIONS 0x8000 1381 1382 static void 1383 show_prerequisites(struct buf_pr *bp, int *flags, int want, int cmd) 1384 { 1385 (void)cmd; /* UNUSED */ 1386 if (co.comment_only) 1387 return; 1388 if ( (*flags & HAVE_IP) == HAVE_IP) 1389 *flags |= HAVE_OPTIONS; 1390 1391 if ( !(*flags & HAVE_OPTIONS)) { 1392 if ( !(*flags & HAVE_PROTO) && (want & HAVE_PROTO)) { 1393 if ( (*flags & HAVE_PROTO4)) 1394 bprintf(bp, " ip4"); 1395 else if ( (*flags & HAVE_PROTO6)) 1396 bprintf(bp, " ip6"); 1397 else 1398 bprintf(bp, " ip"); 1399 } 1400 if ( !(*flags & HAVE_SRCIP) && (want & HAVE_SRCIP)) 1401 bprintf(bp, " from any"); 1402 if ( !(*flags & HAVE_DSTIP) && (want & HAVE_DSTIP)) 1403 bprintf(bp, " to any"); 1404 } 1405 *flags |= want; 1406 } 1407 1408 static void 1409 show_static_rule(struct cmdline_opts *co, struct format_opts *fo, 1410 struct buf_pr *bp, struct ip_fw_rule *rule, struct ip_fw_bcounter *cntr) 1411 { 1412 static int twidth = 0; 1413 int l; 1414 ipfw_insn *cmd, *has_eaction = NULL, *tagptr = NULL; 1415 const char *comment = NULL; /* ptr to comment if we have one */ 1416 const char *ename; 1417 int proto = 0; /* default */ 1418 int flags = 0; /* prerequisites */ 1419 ipfw_insn_log *logptr = NULL; /* set if we find an O_LOG */ 1420 ipfw_insn_altq *altqptr = NULL; /* set if we find an O_ALTQ */ 1421 int or_block = 0; /* we are in an or block */ 1422 uint32_t uval; 1423 1424 if ((fo->set_mask & (1 << rule->set)) == 0) { 1425 /* disabled mask */ 1426 if (!co->show_sets) 1427 return; 1428 else 1429 bprintf(bp, "# DISABLED "); 1430 } 1431 bprintf(bp, "%05u ", rule->rulenum); 1432 1433 /* Print counters if enabled */ 1434 if (fo->pcwidth > 0 || fo->bcwidth > 0) { 1435 pr_u64(bp, &cntr->pcnt, fo->pcwidth); 1436 pr_u64(bp, &cntr->bcnt, fo->bcwidth); 1437 } 1438 1439 if (co->do_time == 2) 1440 bprintf(bp, "%10u ", cntr->timestamp); 1441 else if (co->do_time == 1) { 1442 char timestr[30]; 1443 time_t t = (time_t)0; 1444 1445 if (twidth == 0) { 1446 strcpy(timestr, ctime(&t)); 1447 *strchr(timestr, '\n') = '\0'; 1448 twidth = strlen(timestr); 1449 } 1450 if (cntr->timestamp > 0) { 1451 t = _long_to_time(cntr->timestamp); 1452 1453 strcpy(timestr, ctime(&t)); 1454 *strchr(timestr, '\n') = '\0'; 1455 bprintf(bp, "%s ", timestr); 1456 } else { 1457 bprintf(bp, "%*s", twidth, " "); 1458 } 1459 } 1460 1461 if (co->show_sets) 1462 bprintf(bp, "set %d ", rule->set); 1463 1464 /* 1465 * print the optional "match probability" 1466 */ 1467 if (rule->cmd_len > 0) { 1468 cmd = rule->cmd ; 1469 if (cmd->opcode == O_PROB) { 1470 ipfw_insn_u32 *p = (ipfw_insn_u32 *)cmd; 1471 double d = 1.0 * p->d[0]; 1472 1473 d = (d / 0x7fffffff); 1474 bprintf(bp, "prob %f ", d); 1475 } 1476 } 1477 1478 /* 1479 * first print actions 1480 */ 1481 for (l = rule->cmd_len - rule->act_ofs, cmd = ACTION_PTR(rule); 1482 l > 0 ; l -= F_LEN(cmd), cmd += F_LEN(cmd)) { 1483 switch(cmd->opcode) { 1484 case O_CHECK_STATE: 1485 bprintf(bp, "check-state"); 1486 if (cmd->arg1 != 0) 1487 ename = object_search_ctlv(fo->tstate, 1488 cmd->arg1, IPFW_TLV_STATE_NAME); 1489 else 1490 ename = NULL; 1491 bprintf(bp, " :%s", ename ? ename: "any"); 1492 /* avoid printing anything else */ 1493 flags = HAVE_PROTO | HAVE_SRCIP | 1494 HAVE_DSTIP | HAVE_IP; 1495 break; 1496 1497 case O_ACCEPT: 1498 bprintf(bp, "allow"); 1499 break; 1500 1501 case O_COUNT: 1502 bprintf(bp, "count"); 1503 break; 1504 1505 case O_DENY: 1506 bprintf(bp, "deny"); 1507 break; 1508 1509 case O_REJECT: 1510 if (cmd->arg1 == ICMP_REJECT_RST) 1511 bprintf(bp, "reset"); 1512 else if (cmd->arg1 == ICMP_REJECT_ABORT) 1513 bprintf(bp, "abort"); 1514 else if (cmd->arg1 == ICMP_UNREACH_HOST) 1515 bprintf(bp, "reject"); 1516 else 1517 print_reject_code(bp, cmd->arg1); 1518 break; 1519 1520 case O_UNREACH6: 1521 if (cmd->arg1 == ICMP6_UNREACH_RST) 1522 bprintf(bp, "reset6"); 1523 else if (cmd->arg1 == ICMP6_UNREACH_ABORT) 1524 bprintf(bp, "abort6"); 1525 else 1526 print_unreach6_code(bp, cmd->arg1); 1527 break; 1528 1529 case O_SKIPTO: 1530 bprint_uint_arg(bp, "skipto ", cmd->arg1); 1531 break; 1532 1533 case O_PIPE: 1534 bprint_uint_arg(bp, "pipe ", cmd->arg1); 1535 break; 1536 1537 case O_QUEUE: 1538 bprint_uint_arg(bp, "queue ", cmd->arg1); 1539 break; 1540 1541 case O_DIVERT: 1542 bprint_uint_arg(bp, "divert ", cmd->arg1); 1543 break; 1544 1545 case O_TEE: 1546 bprint_uint_arg(bp, "tee ", cmd->arg1); 1547 break; 1548 1549 case O_NETGRAPH: 1550 bprint_uint_arg(bp, "netgraph ", cmd->arg1); 1551 break; 1552 1553 case O_NGTEE: 1554 bprint_uint_arg(bp, "ngtee ", cmd->arg1); 1555 break; 1556 1557 case O_FORWARD_IP: 1558 { 1559 ipfw_insn_sa *s = (ipfw_insn_sa *)cmd; 1560 1561 if (s->sa.sin_addr.s_addr == INADDR_ANY) { 1562 bprintf(bp, "fwd tablearg"); 1563 } else { 1564 bprintf(bp, "fwd %s",inet_ntoa(s->sa.sin_addr)); 1565 } 1566 if (s->sa.sin_port) 1567 bprintf(bp, ",%d", s->sa.sin_port); 1568 } 1569 break; 1570 1571 case O_FORWARD_IP6: 1572 { 1573 char buf[INET6_ADDRSTRLEN + IF_NAMESIZE + 2]; 1574 ipfw_insn_sa6 *s = (ipfw_insn_sa6 *)cmd; 1575 1576 bprintf(bp, "fwd "); 1577 if (getnameinfo((const struct sockaddr *)&s->sa, 1578 sizeof(struct sockaddr_in6), buf, sizeof(buf), 1579 NULL, 0, NI_NUMERICHOST) == 0) 1580 bprintf(bp, "%s", buf); 1581 if (s->sa.sin6_port) 1582 bprintf(bp, ",%d", s->sa.sin6_port); 1583 } 1584 break; 1585 1586 case O_LOG: /* O_LOG is printed last */ 1587 logptr = (ipfw_insn_log *)cmd; 1588 break; 1589 1590 case O_ALTQ: /* O_ALTQ is printed after O_LOG */ 1591 altqptr = (ipfw_insn_altq *)cmd; 1592 break; 1593 1594 case O_TAG: 1595 tagptr = cmd; 1596 break; 1597 1598 case O_NAT: 1599 if (cmd->arg1 != IP_FW_NAT44_GLOBAL) 1600 bprint_uint_arg(bp, "nat ", cmd->arg1); 1601 else 1602 bprintf(bp, "nat global"); 1603 break; 1604 1605 case O_SETFIB: 1606 if (cmd->arg1 == IP_FW_TARG) 1607 bprint_uint_arg(bp, "setfib ", cmd->arg1); 1608 else 1609 bprintf(bp, "setfib %u", cmd->arg1 & 0x7FFF); 1610 break; 1611 1612 case O_EXTERNAL_ACTION: { 1613 /* 1614 * The external action can consists of two following 1615 * each other opcodes - O_EXTERNAL_ACTION and 1616 * O_EXTERNAL_INSTANCE. The first contains the ID of 1617 * name of external action. The second contains the ID 1618 * of name of external action instance. 1619 * NOTE: in case when external action has no named 1620 * instances support, the second opcode isn't needed. 1621 */ 1622 has_eaction = cmd; 1623 ename = object_search_ctlv(fo->tstate, cmd->arg1, 1624 IPFW_TLV_EACTION); 1625 if (match_token(rule_eactions, ename) != -1) 1626 bprintf(bp, "%s", ename); 1627 else 1628 bprintf(bp, "eaction %s", ename); 1629 break; 1630 } 1631 1632 case O_EXTERNAL_INSTANCE: { 1633 if (has_eaction == NULL) 1634 break; 1635 /* 1636 * XXX: we need to teach ipfw(9) to rewrite opcodes 1637 * in the user buffer on rule addition. When we add 1638 * the rule, we specify zero TLV type for 1639 * O_EXTERNAL_INSTANCE object. To show correct 1640 * rule after `ipfw add` we need to search instance 1641 * name with zero type. But when we do `ipfw show` 1642 * we calculate TLV type using IPFW_TLV_EACTION_NAME() 1643 * macro. 1644 */ 1645 ename = object_search_ctlv(fo->tstate, cmd->arg1, 0); 1646 if (ename == NULL) 1647 ename = object_search_ctlv(fo->tstate, 1648 cmd->arg1, 1649 IPFW_TLV_EACTION_NAME(has_eaction->arg1)); 1650 bprintf(bp, " %s", ename); 1651 break; 1652 } 1653 1654 case O_EXTERNAL_DATA: { 1655 if (has_eaction == NULL) 1656 break; 1657 /* 1658 * Currently we support data formatting only for 1659 * external data with datalen u16. For unknown data 1660 * print its size in bytes. 1661 */ 1662 if (cmd->len == F_INSN_SIZE(ipfw_insn)) 1663 bprintf(bp, " %u", cmd->arg1); 1664 else 1665 bprintf(bp, " %ubytes", 1666 cmd->len * sizeof(uint32_t)); 1667 break; 1668 } 1669 1670 case O_SETDSCP: 1671 { 1672 const char *code; 1673 1674 if (cmd->arg1 == IP_FW_TARG) { 1675 bprint_uint_arg(bp, "setdscp ", cmd->arg1); 1676 break; 1677 } 1678 uval = cmd->arg1 & 0x3F; 1679 if ((code = match_value(f_ipdscp, uval)) != NULL) 1680 bprintf(bp, "setdscp %s", code); 1681 else 1682 bprint_uint_arg(bp, "setdscp ", uval); 1683 } 1684 break; 1685 1686 case O_REASS: 1687 bprintf(bp, "reass"); 1688 break; 1689 1690 case O_CALLRETURN: 1691 if (cmd->len & F_NOT) 1692 bprintf(bp, "return"); 1693 else 1694 bprint_uint_arg(bp, "call ", cmd->arg1); 1695 break; 1696 1697 default: 1698 bprintf(bp, "** unrecognized action %d len %d ", 1699 cmd->opcode, cmd->len); 1700 } 1701 } 1702 if (logptr) { 1703 if (logptr->max_log > 0) 1704 bprintf(bp, " log logamount %d", logptr->max_log); 1705 else 1706 bprintf(bp, " log"); 1707 } 1708 #ifndef NO_ALTQ 1709 if (altqptr) { 1710 print_altq_cmd(bp, altqptr); 1711 } 1712 #endif 1713 if (tagptr) { 1714 if (tagptr->len & F_NOT) 1715 bprint_uint_arg(bp, " untag ", tagptr->arg1); 1716 else 1717 bprint_uint_arg(bp, " tag ", tagptr->arg1); 1718 } 1719 1720 /* 1721 * then print the body. 1722 */ 1723 for (l = rule->act_ofs, cmd = rule->cmd; 1724 l > 0 ; l -= F_LEN(cmd) , cmd += F_LEN(cmd)) { 1725 if ((cmd->len & F_OR) || (cmd->len & F_NOT)) 1726 continue; 1727 if (cmd->opcode == O_IP4) { 1728 flags |= HAVE_PROTO4; 1729 break; 1730 } else if (cmd->opcode == O_IP6) { 1731 flags |= HAVE_PROTO6; 1732 break; 1733 } 1734 } 1735 if (rule->flags & IPFW_RULE_NOOPT) { /* empty rules before options */ 1736 if (!co->do_compact) { 1737 show_prerequisites(bp, &flags, HAVE_PROTO, 0); 1738 bprintf(bp, " from any to any"); 1739 } 1740 flags |= HAVE_IP | HAVE_OPTIONS | HAVE_PROTO | 1741 HAVE_SRCIP | HAVE_DSTIP; 1742 } 1743 1744 if (co->comment_only) 1745 comment = "..."; 1746 1747 for (l = rule->act_ofs, cmd = rule->cmd; 1748 l > 0 ; l -= F_LEN(cmd) , cmd += F_LEN(cmd)) { 1749 /* useful alias */ 1750 ipfw_insn_u32 *cmd32 = (ipfw_insn_u32 *)cmd; 1751 1752 if (co->comment_only) { 1753 if (cmd->opcode != O_NOP) 1754 continue; 1755 bprintf(bp, " // %s\n", (char *)(cmd + 1)); 1756 return; 1757 } 1758 1759 show_prerequisites(bp, &flags, 0, cmd->opcode); 1760 1761 switch(cmd->opcode) { 1762 case O_PROB: 1763 break; /* done already */ 1764 1765 case O_PROBE_STATE: 1766 break; /* no need to print anything here */ 1767 1768 case O_IP_SRC: 1769 case O_IP_SRC_LOOKUP: 1770 case O_IP_SRC_MASK: 1771 case O_IP_SRC_ME: 1772 case O_IP_SRC_SET: 1773 show_prerequisites(bp, &flags, HAVE_PROTO, 0); 1774 if (!(flags & HAVE_SRCIP)) 1775 bprintf(bp, " from"); 1776 if ((cmd->len & F_OR) && !or_block) 1777 bprintf(bp, " {"); 1778 print_ip(bp, fo, (ipfw_insn_ip *)cmd, 1779 (flags & HAVE_OPTIONS) ? " src-ip" : ""); 1780 flags |= HAVE_SRCIP; 1781 break; 1782 1783 case O_IP_DST: 1784 case O_IP_DST_LOOKUP: 1785 case O_IP_DST_MASK: 1786 case O_IP_DST_ME: 1787 case O_IP_DST_SET: 1788 show_prerequisites(bp, &flags, HAVE_PROTO|HAVE_SRCIP, 0); 1789 if (!(flags & HAVE_DSTIP)) 1790 bprintf(bp, " to"); 1791 if ((cmd->len & F_OR) && !or_block) 1792 bprintf(bp, " {"); 1793 print_ip(bp, fo, (ipfw_insn_ip *)cmd, 1794 (flags & HAVE_OPTIONS) ? " dst-ip" : ""); 1795 flags |= HAVE_DSTIP; 1796 break; 1797 1798 case O_IP6_SRC: 1799 case O_IP6_SRC_MASK: 1800 case O_IP6_SRC_ME: 1801 show_prerequisites(bp, &flags, HAVE_PROTO, 0); 1802 if (!(flags & HAVE_SRCIP)) 1803 bprintf(bp, " from"); 1804 if ((cmd->len & F_OR) && !or_block) 1805 bprintf(bp, " {"); 1806 print_ip6(bp, (ipfw_insn_ip6 *)cmd, 1807 (flags & HAVE_OPTIONS) ? " src-ip6" : ""); 1808 flags |= HAVE_SRCIP | HAVE_PROTO; 1809 break; 1810 1811 case O_IP6_DST: 1812 case O_IP6_DST_MASK: 1813 case O_IP6_DST_ME: 1814 show_prerequisites(bp, &flags, HAVE_PROTO|HAVE_SRCIP, 0); 1815 if (!(flags & HAVE_DSTIP)) 1816 bprintf(bp, " to"); 1817 if ((cmd->len & F_OR) && !or_block) 1818 bprintf(bp, " {"); 1819 print_ip6(bp, (ipfw_insn_ip6 *)cmd, 1820 (flags & HAVE_OPTIONS) ? " dst-ip6" : ""); 1821 flags |= HAVE_DSTIP; 1822 break; 1823 1824 case O_FLOW6ID: 1825 print_flow6id(bp, (ipfw_insn_u32 *) cmd ); 1826 flags |= HAVE_OPTIONS; 1827 break; 1828 1829 case O_IP_DSTPORT: 1830 show_prerequisites(bp, &flags, 1831 HAVE_PROTO | HAVE_SRCIP | 1832 HAVE_DSTIP | HAVE_IP, 0); 1833 case O_IP_SRCPORT: 1834 if (flags & HAVE_DSTIP) 1835 flags |= HAVE_IP; 1836 show_prerequisites(bp, &flags, 1837 HAVE_PROTO | HAVE_SRCIP, 0); 1838 if ((cmd->len & F_OR) && !or_block) 1839 bprintf(bp, " {"); 1840 if (cmd->len & F_NOT) 1841 bprintf(bp, " not"); 1842 print_newports(bp, (ipfw_insn_u16 *)cmd, proto, 1843 (flags & HAVE_OPTIONS) ? cmd->opcode : 0); 1844 break; 1845 1846 case O_PROTO: { 1847 struct protoent *pe = NULL; 1848 1849 if ((cmd->len & F_OR) && !or_block) 1850 bprintf(bp, " {"); 1851 if (cmd->len & F_NOT) 1852 bprintf(bp, " not"); 1853 proto = cmd->arg1; 1854 pe = getprotobynumber(cmd->arg1); 1855 if ((flags & (HAVE_PROTO4 | HAVE_PROTO6)) && 1856 !(flags & HAVE_PROTO)) 1857 show_prerequisites(bp, &flags, 1858 HAVE_PROTO | HAVE_IP | HAVE_SRCIP | 1859 HAVE_DSTIP | HAVE_OPTIONS, 0); 1860 if (flags & HAVE_OPTIONS) 1861 bprintf(bp, " proto"); 1862 if (pe) 1863 bprintf(bp, " %s", pe->p_name); 1864 else 1865 bprintf(bp, " %u", cmd->arg1); 1866 } 1867 flags |= HAVE_PROTO; 1868 break; 1869 1870 default: /*options ... */ 1871 if (!(cmd->len & (F_OR|F_NOT))) 1872 if (((cmd->opcode == O_IP6) && 1873 (flags & HAVE_PROTO6)) || 1874 ((cmd->opcode == O_IP4) && 1875 (flags & HAVE_PROTO4))) 1876 break; 1877 show_prerequisites(bp, &flags, HAVE_PROTO | HAVE_SRCIP | 1878 HAVE_DSTIP | HAVE_IP | HAVE_OPTIONS, 0); 1879 if ((cmd->len & F_OR) && !or_block) 1880 bprintf(bp, " {"); 1881 if (cmd->len & F_NOT && cmd->opcode != O_IN) 1882 bprintf(bp, " not"); 1883 switch(cmd->opcode) { 1884 case O_MACADDR2: { 1885 ipfw_insn_mac *m = (ipfw_insn_mac *)cmd; 1886 1887 bprintf(bp, " MAC"); 1888 print_mac(bp, m->addr, m->mask); 1889 print_mac(bp, m->addr + 6, m->mask + 6); 1890 } 1891 break; 1892 1893 case O_MAC_TYPE: 1894 print_newports(bp, (ipfw_insn_u16 *)cmd, 1895 IPPROTO_ETHERTYPE, cmd->opcode); 1896 break; 1897 1898 1899 case O_FRAG: 1900 bprintf(bp, " frag"); 1901 break; 1902 1903 case O_FIB: 1904 bprintf(bp, " fib %u", cmd->arg1 ); 1905 break; 1906 case O_SOCKARG: 1907 bprintf(bp, " sockarg"); 1908 break; 1909 1910 case O_IN: 1911 bprintf(bp, cmd->len & F_NOT ? " out" : " in"); 1912 break; 1913 1914 case O_DIVERTED: 1915 switch (cmd->arg1) { 1916 case 3: 1917 bprintf(bp, " diverted"); 1918 break; 1919 case 1: 1920 bprintf(bp, " diverted-loopback"); 1921 break; 1922 case 2: 1923 bprintf(bp, " diverted-output"); 1924 break; 1925 default: 1926 bprintf(bp, " diverted-?<%u>", cmd->arg1); 1927 break; 1928 } 1929 break; 1930 1931 case O_LAYER2: 1932 bprintf(bp, " layer2"); 1933 break; 1934 case O_XMIT: 1935 case O_RECV: 1936 case O_VIA: 1937 { 1938 char const *s, *t; 1939 ipfw_insn_if *cmdif = (ipfw_insn_if *)cmd; 1940 1941 if (cmd->opcode == O_XMIT) 1942 s = "xmit"; 1943 else if (cmd->opcode == O_RECV) 1944 s = "recv"; 1945 else /* if (cmd->opcode == O_VIA) */ 1946 s = "via"; 1947 if (cmdif->name[0] == '\0') 1948 bprintf(bp, " %s %s", s, 1949 inet_ntoa(cmdif->p.ip)); 1950 else if (cmdif->name[0] == '\1') { 1951 /* interface table */ 1952 t = table_search_ctlv(fo->tstate, 1953 cmdif->p.kidx); 1954 bprintf(bp, " %s table(%s)", s, t); 1955 } else 1956 bprintf(bp, " %s %s", s, cmdif->name); 1957 1958 break; 1959 } 1960 case O_IP_FLOW_LOOKUP: 1961 { 1962 char *t; 1963 1964 t = table_search_ctlv(fo->tstate, cmd->arg1); 1965 bprintf(bp, " flow table(%s", t); 1966 if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_u32)) 1967 bprintf(bp, ",%u", 1968 ((ipfw_insn_u32 *)cmd)->d[0]); 1969 bprintf(bp, ")"); 1970 break; 1971 } 1972 case O_IPID: 1973 if (F_LEN(cmd) == 1) 1974 bprintf(bp, " ipid %u", cmd->arg1 ); 1975 else 1976 print_newports(bp, (ipfw_insn_u16 *)cmd, 0, 1977 O_IPID); 1978 break; 1979 1980 case O_IPTTL: 1981 if (F_LEN(cmd) == 1) 1982 bprintf(bp, " ipttl %u", cmd->arg1 ); 1983 else 1984 print_newports(bp, (ipfw_insn_u16 *)cmd, 0, 1985 O_IPTTL); 1986 break; 1987 1988 case O_IPVER: 1989 bprintf(bp, " ipver %u", cmd->arg1 ); 1990 break; 1991 1992 case O_IPPRECEDENCE: 1993 bprintf(bp, " ipprecedence %u", cmd->arg1 >> 5); 1994 break; 1995 1996 case O_DSCP: 1997 print_dscp(bp, (ipfw_insn_u32 *)cmd); 1998 break; 1999 2000 case O_IPLEN: 2001 if (F_LEN(cmd) == 1) 2002 bprintf(bp, " iplen %u", cmd->arg1 ); 2003 else 2004 print_newports(bp, (ipfw_insn_u16 *)cmd, 0, 2005 O_IPLEN); 2006 break; 2007 2008 case O_IPOPT: 2009 print_flags(bp, "ipoptions", cmd, f_ipopts); 2010 break; 2011 2012 case O_IPTOS: 2013 print_flags(bp, "iptos", cmd, f_iptos); 2014 break; 2015 2016 case O_ICMPTYPE: 2017 print_icmptypes(bp, (ipfw_insn_u32 *)cmd); 2018 break; 2019 2020 case O_ESTAB: 2021 bprintf(bp, " established"); 2022 break; 2023 2024 case O_TCPDATALEN: 2025 if (F_LEN(cmd) == 1) 2026 bprintf(bp, " tcpdatalen %u", cmd->arg1 ); 2027 else 2028 print_newports(bp, (ipfw_insn_u16 *)cmd, 0, 2029 O_TCPDATALEN); 2030 break; 2031 2032 case O_TCPFLAGS: 2033 print_flags(bp, "tcpflags", cmd, f_tcpflags); 2034 break; 2035 2036 case O_TCPOPTS: 2037 print_flags(bp, "tcpoptions", cmd, f_tcpopts); 2038 break; 2039 2040 case O_TCPWIN: 2041 if (F_LEN(cmd) == 1) 2042 bprintf(bp, " tcpwin %u", cmd->arg1); 2043 else 2044 print_newports(bp, (ipfw_insn_u16 *)cmd, 0, 2045 O_TCPWIN); 2046 break; 2047 2048 case O_TCPACK: 2049 bprintf(bp, " tcpack %d", ntohl(cmd32->d[0])); 2050 break; 2051 2052 case O_TCPSEQ: 2053 bprintf(bp, " tcpseq %d", ntohl(cmd32->d[0])); 2054 break; 2055 2056 case O_UID: 2057 { 2058 struct passwd *pwd = getpwuid(cmd32->d[0]); 2059 2060 if (pwd) 2061 bprintf(bp, " uid %s", pwd->pw_name); 2062 else 2063 bprintf(bp, " uid %u", cmd32->d[0]); 2064 } 2065 break; 2066 2067 case O_GID: 2068 { 2069 struct group *grp = getgrgid(cmd32->d[0]); 2070 2071 if (grp) 2072 bprintf(bp, " gid %s", grp->gr_name); 2073 else 2074 bprintf(bp, " gid %u", cmd32->d[0]); 2075 } 2076 break; 2077 2078 case O_JAIL: 2079 bprintf(bp, " jail %d", cmd32->d[0]); 2080 break; 2081 2082 case O_VERREVPATH: 2083 bprintf(bp, " verrevpath"); 2084 break; 2085 2086 case O_VERSRCREACH: 2087 bprintf(bp, " versrcreach"); 2088 break; 2089 2090 case O_ANTISPOOF: 2091 bprintf(bp, " antispoof"); 2092 break; 2093 2094 case O_IPSEC: 2095 bprintf(bp, " ipsec"); 2096 break; 2097 2098 case O_NOP: 2099 comment = (char *)(cmd + 1); 2100 break; 2101 2102 case O_KEEP_STATE: 2103 bprintf(bp, " keep-state"); 2104 bprintf(bp, " :%s", 2105 object_search_ctlv(fo->tstate, cmd->arg1, 2106 IPFW_TLV_STATE_NAME)); 2107 break; 2108 2109 case O_LIMIT: { 2110 struct _s_x *p = limit_masks; 2111 ipfw_insn_limit *c = (ipfw_insn_limit *)cmd; 2112 uint8_t x = c->limit_mask; 2113 char const *comma = " "; 2114 2115 bprintf(bp, " limit"); 2116 for (; p->x != 0 ; p++) 2117 if ((x & p->x) == p->x) { 2118 x &= ~p->x; 2119 bprintf(bp, "%s%s", comma,p->s); 2120 comma = ","; 2121 } 2122 bprint_uint_arg(bp, " ", c->conn_limit); 2123 bprintf(bp, " :%s", 2124 object_search_ctlv(fo->tstate, cmd->arg1, 2125 IPFW_TLV_STATE_NAME)); 2126 break; 2127 } 2128 2129 case O_IP6: 2130 bprintf(bp, " ip6"); 2131 break; 2132 2133 case O_IP4: 2134 bprintf(bp, " ip4"); 2135 break; 2136 2137 case O_ICMP6TYPE: 2138 print_icmp6types(bp, (ipfw_insn_u32 *)cmd); 2139 break; 2140 2141 case O_EXT_HDR: 2142 print_ext6hdr(bp, (ipfw_insn *)cmd); 2143 break; 2144 2145 case O_TAGGED: 2146 if (F_LEN(cmd) == 1) 2147 bprint_uint_arg(bp, " tagged ", 2148 cmd->arg1); 2149 else 2150 print_newports(bp, (ipfw_insn_u16 *)cmd, 2151 0, O_TAGGED); 2152 break; 2153 2154 default: 2155 bprintf(bp, " [opcode %d len %d]", 2156 cmd->opcode, cmd->len); 2157 } 2158 } 2159 if (cmd->len & F_OR) { 2160 bprintf(bp, " or"); 2161 or_block = 1; 2162 } else if (or_block) { 2163 bprintf(bp, " }"); 2164 or_block = 0; 2165 } 2166 } 2167 show_prerequisites(bp, &flags, HAVE_PROTO | HAVE_SRCIP | HAVE_DSTIP 2168 | HAVE_IP, 0); 2169 if (comment) 2170 bprintf(bp, " // %s", comment); 2171 bprintf(bp, "\n"); 2172 } 2173 2174 static void 2175 show_dyn_state(struct cmdline_opts *co, struct format_opts *fo, 2176 struct buf_pr *bp, ipfw_dyn_rule *d) 2177 { 2178 struct protoent *pe; 2179 struct in_addr a; 2180 uint16_t rulenum; 2181 char buf[INET6_ADDRSTRLEN]; 2182 2183 if (!co->do_expired) { 2184 if (!d->expire && !(d->dyn_type == O_LIMIT_PARENT)) 2185 return; 2186 } 2187 bcopy(&d->rule, &rulenum, sizeof(rulenum)); 2188 bprintf(bp, "%05d", rulenum); 2189 if (fo->pcwidth > 0 || fo->bcwidth > 0) { 2190 bprintf(bp, " "); 2191 pr_u64(bp, &d->pcnt, fo->pcwidth); 2192 pr_u64(bp, &d->bcnt, fo->bcwidth); 2193 bprintf(bp, "(%ds)", d->expire); 2194 } 2195 switch (d->dyn_type) { 2196 case O_LIMIT_PARENT: 2197 bprintf(bp, " PARENT %d", d->count); 2198 break; 2199 case O_LIMIT: 2200 bprintf(bp, " LIMIT"); 2201 break; 2202 case O_KEEP_STATE: /* bidir, no mask */ 2203 bprintf(bp, " STATE"); 2204 break; 2205 } 2206 2207 if ((pe = getprotobynumber(d->id.proto)) != NULL) 2208 bprintf(bp, " %s", pe->p_name); 2209 else 2210 bprintf(bp, " proto %u", d->id.proto); 2211 2212 if (d->id.addr_type == 4) { 2213 a.s_addr = htonl(d->id.src_ip); 2214 bprintf(bp, " %s %d", inet_ntoa(a), d->id.src_port); 2215 2216 a.s_addr = htonl(d->id.dst_ip); 2217 bprintf(bp, " <-> %s %d", inet_ntoa(a), d->id.dst_port); 2218 } else if (d->id.addr_type == 6) { 2219 bprintf(bp, " %s %d", inet_ntop(AF_INET6, &d->id.src_ip6, buf, 2220 sizeof(buf)), d->id.src_port); 2221 bprintf(bp, " <-> %s %d", inet_ntop(AF_INET6, &d->id.dst_ip6, 2222 buf, sizeof(buf)), d->id.dst_port); 2223 } else 2224 bprintf(bp, " UNKNOWN <-> UNKNOWN"); 2225 if (d->kidx != 0) 2226 bprintf(bp, " :%s", object_search_ctlv(fo->tstate, 2227 d->kidx, IPFW_TLV_STATE_NAME)); 2228 } 2229 2230 static int 2231 do_range_cmd(int cmd, ipfw_range_tlv *rt) 2232 { 2233 ipfw_range_header rh; 2234 size_t sz; 2235 2236 memset(&rh, 0, sizeof(rh)); 2237 memcpy(&rh.range, rt, sizeof(*rt)); 2238 rh.range.head.length = sizeof(*rt); 2239 rh.range.head.type = IPFW_TLV_RANGE; 2240 sz = sizeof(rh); 2241 2242 if (do_get3(cmd, &rh.opheader, &sz) != 0) 2243 return (-1); 2244 /* Save number of matched objects */ 2245 rt->new_set = rh.range.new_set; 2246 return (0); 2247 } 2248 2249 /* 2250 * This one handles all set-related commands 2251 * ipfw set { show | enable | disable } 2252 * ipfw set swap X Y 2253 * ipfw set move X to Y 2254 * ipfw set move rule X to Y 2255 */ 2256 void 2257 ipfw_sets_handler(char *av[]) 2258 { 2259 ipfw_range_tlv rt; 2260 char *msg; 2261 size_t size; 2262 uint32_t masks[2]; 2263 int i; 2264 uint16_t rulenum; 2265 uint8_t cmd; 2266 2267 av++; 2268 memset(&rt, 0, sizeof(rt)); 2269 2270 if (av[0] == NULL) 2271 errx(EX_USAGE, "set needs command"); 2272 if (_substrcmp(*av, "show") == 0) { 2273 struct format_opts fo; 2274 ipfw_cfg_lheader *cfg; 2275 2276 memset(&fo, 0, sizeof(fo)); 2277 if (ipfw_get_config(&co, &fo, &cfg, &size) != 0) 2278 err(EX_OSERR, "requesting config failed"); 2279 2280 for (i = 0, msg = "disable"; i < RESVD_SET; i++) 2281 if ((cfg->set_mask & (1<<i)) == 0) { 2282 printf("%s %d", msg, i); 2283 msg = ""; 2284 } 2285 msg = (cfg->set_mask != (uint32_t)-1) ? " enable" : "enable"; 2286 for (i = 0; i < RESVD_SET; i++) 2287 if ((cfg->set_mask & (1<<i)) != 0) { 2288 printf("%s %d", msg, i); 2289 msg = ""; 2290 } 2291 printf("\n"); 2292 free(cfg); 2293 } else if (_substrcmp(*av, "swap") == 0) { 2294 av++; 2295 if ( av[0] == NULL || av[1] == NULL ) 2296 errx(EX_USAGE, "set swap needs 2 set numbers\n"); 2297 rt.set = atoi(av[0]); 2298 rt.new_set = atoi(av[1]); 2299 if (!isdigit(*(av[0])) || rt.set > RESVD_SET) 2300 errx(EX_DATAERR, "invalid set number %s\n", av[0]); 2301 if (!isdigit(*(av[1])) || rt.new_set > RESVD_SET) 2302 errx(EX_DATAERR, "invalid set number %s\n", av[1]); 2303 i = do_range_cmd(IP_FW_SET_SWAP, &rt); 2304 } else if (_substrcmp(*av, "move") == 0) { 2305 av++; 2306 if (av[0] && _substrcmp(*av, "rule") == 0) { 2307 rt.flags = IPFW_RCFLAG_RANGE; /* move rules to new set */ 2308 cmd = IP_FW_XMOVE; 2309 av++; 2310 } else 2311 cmd = IP_FW_SET_MOVE; /* Move set to new one */ 2312 if (av[0] == NULL || av[1] == NULL || av[2] == NULL || 2313 av[3] != NULL || _substrcmp(av[1], "to") != 0) 2314 errx(EX_USAGE, "syntax: set move [rule] X to Y\n"); 2315 rulenum = atoi(av[0]); 2316 rt.new_set = atoi(av[2]); 2317 if (cmd == IP_FW_XMOVE) { 2318 rt.start_rule = rulenum; 2319 rt.end_rule = rulenum; 2320 } else 2321 rt.set = rulenum; 2322 rt.new_set = atoi(av[2]); 2323 if (!isdigit(*(av[0])) || (cmd == 3 && rt.set > RESVD_SET) || 2324 (cmd == 2 && rt.start_rule == IPFW_DEFAULT_RULE) ) 2325 errx(EX_DATAERR, "invalid source number %s\n", av[0]); 2326 if (!isdigit(*(av[2])) || rt.new_set > RESVD_SET) 2327 errx(EX_DATAERR, "invalid dest. set %s\n", av[1]); 2328 i = do_range_cmd(cmd, &rt); 2329 if (i < 0) 2330 err(EX_OSERR, "failed to move %s", 2331 cmd == IP_FW_SET_MOVE ? "set": "rule"); 2332 } else if (_substrcmp(*av, "disable") == 0 || 2333 _substrcmp(*av, "enable") == 0 ) { 2334 int which = _substrcmp(*av, "enable") == 0 ? 1 : 0; 2335 2336 av++; 2337 masks[0] = masks[1] = 0; 2338 2339 while (av[0]) { 2340 if (isdigit(**av)) { 2341 i = atoi(*av); 2342 if (i < 0 || i > RESVD_SET) 2343 errx(EX_DATAERR, 2344 "invalid set number %d\n", i); 2345 masks[which] |= (1<<i); 2346 } else if (_substrcmp(*av, "disable") == 0) 2347 which = 0; 2348 else if (_substrcmp(*av, "enable") == 0) 2349 which = 1; 2350 else 2351 errx(EX_DATAERR, 2352 "invalid set command %s\n", *av); 2353 av++; 2354 } 2355 if ( (masks[0] & masks[1]) != 0 ) 2356 errx(EX_DATAERR, 2357 "cannot enable and disable the same set\n"); 2358 2359 rt.set = masks[0]; 2360 rt.new_set = masks[1]; 2361 i = do_range_cmd(IP_FW_SET_ENABLE, &rt); 2362 if (i) 2363 warn("set enable/disable: setsockopt(IP_FW_SET_ENABLE)"); 2364 } else 2365 errx(EX_USAGE, "invalid set command %s\n", *av); 2366 } 2367 2368 void 2369 ipfw_sysctl_handler(char *av[], int which) 2370 { 2371 av++; 2372 2373 if (av[0] == NULL) { 2374 warnx("missing keyword to enable/disable\n"); 2375 } else if (_substrcmp(*av, "firewall") == 0) { 2376 sysctlbyname("net.inet.ip.fw.enable", NULL, 0, 2377 &which, sizeof(which)); 2378 sysctlbyname("net.inet6.ip6.fw.enable", NULL, 0, 2379 &which, sizeof(which)); 2380 } else if (_substrcmp(*av, "one_pass") == 0) { 2381 sysctlbyname("net.inet.ip.fw.one_pass", NULL, 0, 2382 &which, sizeof(which)); 2383 } else if (_substrcmp(*av, "debug") == 0) { 2384 sysctlbyname("net.inet.ip.fw.debug", NULL, 0, 2385 &which, sizeof(which)); 2386 } else if (_substrcmp(*av, "verbose") == 0) { 2387 sysctlbyname("net.inet.ip.fw.verbose", NULL, 0, 2388 &which, sizeof(which)); 2389 } else if (_substrcmp(*av, "dyn_keepalive") == 0) { 2390 sysctlbyname("net.inet.ip.fw.dyn_keepalive", NULL, 0, 2391 &which, sizeof(which)); 2392 #ifndef NO_ALTQ 2393 } else if (_substrcmp(*av, "altq") == 0) { 2394 altq_set_enabled(which); 2395 #endif 2396 } else { 2397 warnx("unrecognize enable/disable keyword: %s\n", *av); 2398 } 2399 } 2400 2401 typedef void state_cb(struct cmdline_opts *co, struct format_opts *fo, 2402 void *arg, void *state); 2403 2404 static void 2405 prepare_format_dyn(struct cmdline_opts *co, struct format_opts *fo, 2406 void *arg, void *_state) 2407 { 2408 ipfw_dyn_rule *d; 2409 int width; 2410 uint8_t set; 2411 2412 d = (ipfw_dyn_rule *)_state; 2413 /* Count _ALL_ states */ 2414 fo->dcnt++; 2415 2416 if (fo->show_counters == 0) 2417 return; 2418 2419 if (co->use_set) { 2420 /* skip states from another set */ 2421 bcopy((char *)&d->rule + sizeof(uint16_t), &set, 2422 sizeof(uint8_t)); 2423 if (set != co->use_set - 1) 2424 return; 2425 } 2426 2427 width = pr_u64(NULL, &d->pcnt, 0); 2428 if (width > fo->pcwidth) 2429 fo->pcwidth = width; 2430 2431 width = pr_u64(NULL, &d->bcnt, 0); 2432 if (width > fo->bcwidth) 2433 fo->bcwidth = width; 2434 } 2435 2436 static int 2437 foreach_state(struct cmdline_opts *co, struct format_opts *fo, 2438 caddr_t base, size_t sz, state_cb dyn_bc, void *dyn_arg) 2439 { 2440 int ttype; 2441 state_cb *fptr; 2442 void *farg; 2443 ipfw_obj_tlv *tlv; 2444 ipfw_obj_ctlv *ctlv; 2445 2446 fptr = NULL; 2447 ttype = 0; 2448 2449 while (sz > 0) { 2450 ctlv = (ipfw_obj_ctlv *)base; 2451 switch (ctlv->head.type) { 2452 case IPFW_TLV_DYNSTATE_LIST: 2453 base += sizeof(*ctlv); 2454 sz -= sizeof(*ctlv); 2455 ttype = IPFW_TLV_DYN_ENT; 2456 fptr = dyn_bc; 2457 farg = dyn_arg; 2458 break; 2459 default: 2460 return (sz); 2461 } 2462 2463 while (sz > 0) { 2464 tlv = (ipfw_obj_tlv *)base; 2465 if (tlv->type != ttype) 2466 break; 2467 2468 fptr(co, fo, farg, tlv + 1); 2469 sz -= tlv->length; 2470 base += tlv->length; 2471 } 2472 } 2473 2474 return (sz); 2475 } 2476 2477 static void 2478 prepare_format_opts(struct cmdline_opts *co, struct format_opts *fo, 2479 ipfw_obj_tlv *rtlv, int rcnt, caddr_t dynbase, size_t dynsz) 2480 { 2481 int bcwidth, pcwidth, width; 2482 int n; 2483 struct ip_fw_bcounter *cntr; 2484 struct ip_fw_rule *r; 2485 2486 bcwidth = 0; 2487 pcwidth = 0; 2488 if (fo->show_counters != 0) { 2489 for (n = 0; n < rcnt; n++, 2490 rtlv = (ipfw_obj_tlv *)((caddr_t)rtlv + rtlv->length)) { 2491 cntr = (struct ip_fw_bcounter *)(rtlv + 1); 2492 r = (struct ip_fw_rule *)((caddr_t)cntr + cntr->size); 2493 /* skip rules from another set */ 2494 if (co->use_set && r->set != co->use_set - 1) 2495 continue; 2496 2497 /* packet counter */ 2498 width = pr_u64(NULL, &cntr->pcnt, 0); 2499 if (width > pcwidth) 2500 pcwidth = width; 2501 2502 /* byte counter */ 2503 width = pr_u64(NULL, &cntr->bcnt, 0); 2504 if (width > bcwidth) 2505 bcwidth = width; 2506 } 2507 } 2508 fo->bcwidth = bcwidth; 2509 fo->pcwidth = pcwidth; 2510 2511 fo->dcnt = 0; 2512 if (co->do_dynamic && dynsz > 0) 2513 foreach_state(co, fo, dynbase, dynsz, prepare_format_dyn, NULL); 2514 } 2515 2516 static int 2517 list_static_range(struct cmdline_opts *co, struct format_opts *fo, 2518 struct buf_pr *bp, ipfw_obj_tlv *rtlv, int rcnt) 2519 { 2520 int n, seen; 2521 struct ip_fw_rule *r; 2522 struct ip_fw_bcounter *cntr; 2523 int c = 0; 2524 2525 for (n = seen = 0; n < rcnt; n++, 2526 rtlv = (ipfw_obj_tlv *)((caddr_t)rtlv + rtlv->length)) { 2527 2528 if ((fo->show_counters | fo->show_time) != 0) { 2529 cntr = (struct ip_fw_bcounter *)(rtlv + 1); 2530 r = (struct ip_fw_rule *)((caddr_t)cntr + cntr->size); 2531 } else { 2532 cntr = NULL; 2533 r = (struct ip_fw_rule *)(rtlv + 1); 2534 } 2535 if (r->rulenum > fo->last) 2536 break; 2537 if (co->use_set && r->set != co->use_set - 1) 2538 continue; 2539 if (r->rulenum >= fo->first && r->rulenum <= fo->last) { 2540 show_static_rule(co, fo, bp, r, cntr); 2541 printf("%s", bp->buf); 2542 c += rtlv->length; 2543 bp_flush(bp); 2544 seen++; 2545 } 2546 } 2547 2548 return (seen); 2549 } 2550 2551 static void 2552 list_dyn_state(struct cmdline_opts *co, struct format_opts *fo, 2553 void *_arg, void *_state) 2554 { 2555 uint16_t rulenum; 2556 uint8_t set; 2557 ipfw_dyn_rule *d; 2558 struct buf_pr *bp; 2559 2560 d = (ipfw_dyn_rule *)_state; 2561 bp = (struct buf_pr *)_arg; 2562 2563 bcopy(&d->rule, &rulenum, sizeof(rulenum)); 2564 if (rulenum > fo->last) 2565 return; 2566 if (co->use_set) { 2567 bcopy((char *)&d->rule + sizeof(uint16_t), 2568 &set, sizeof(uint8_t)); 2569 if (set != co->use_set - 1) 2570 return; 2571 } 2572 if (rulenum >= fo->first) { 2573 show_dyn_state(co, fo, bp, d); 2574 printf("%s\n", bp->buf); 2575 bp_flush(bp); 2576 } 2577 } 2578 2579 static int 2580 list_dyn_range(struct cmdline_opts *co, struct format_opts *fo, 2581 struct buf_pr *bp, caddr_t base, size_t sz) 2582 { 2583 2584 sz = foreach_state(co, fo, base, sz, list_dyn_state, bp); 2585 return (sz); 2586 } 2587 2588 void 2589 ipfw_list(int ac, char *av[], int show_counters) 2590 { 2591 ipfw_cfg_lheader *cfg; 2592 struct format_opts sfo; 2593 size_t sz; 2594 int error; 2595 int lac; 2596 char **lav; 2597 uint32_t rnum; 2598 char *endptr; 2599 2600 if (co.test_only) { 2601 fprintf(stderr, "Testing only, list disabled\n"); 2602 return; 2603 } 2604 if (co.do_pipe) { 2605 dummynet_list(ac, av, show_counters); 2606 return; 2607 } 2608 2609 ac--; 2610 av++; 2611 memset(&sfo, 0, sizeof(sfo)); 2612 2613 /* Determine rule range to request */ 2614 if (ac > 0) { 2615 for (lac = ac, lav = av; lac != 0; lac--) { 2616 rnum = strtoul(*lav++, &endptr, 10); 2617 if (sfo.first == 0 || rnum < sfo.first) 2618 sfo.first = rnum; 2619 2620 if (*endptr == '-') 2621 rnum = strtoul(endptr + 1, &endptr, 10); 2622 if (sfo.last == 0 || rnum > sfo.last) 2623 sfo.last = rnum; 2624 } 2625 } 2626 2627 /* get configuraion from kernel */ 2628 cfg = NULL; 2629 sfo.show_counters = show_counters; 2630 sfo.show_time = co.do_time; 2631 sfo.flags = IPFW_CFG_GET_STATIC; 2632 if (co.do_dynamic != 0) 2633 sfo.flags |= IPFW_CFG_GET_STATES; 2634 if ((sfo.show_counters | sfo.show_time) != 0) 2635 sfo.flags |= IPFW_CFG_GET_COUNTERS; 2636 if (ipfw_get_config(&co, &sfo, &cfg, &sz) != 0) 2637 err(EX_OSERR, "retrieving config failed"); 2638 2639 error = ipfw_show_config(&co, &sfo, cfg, sz, ac, av); 2640 2641 free(cfg); 2642 2643 if (error != EX_OK) 2644 exit(error); 2645 } 2646 2647 static int 2648 ipfw_show_config(struct cmdline_opts *co, struct format_opts *fo, 2649 ipfw_cfg_lheader *cfg, size_t sz, int ac, char *av[]) 2650 { 2651 caddr_t dynbase; 2652 size_t dynsz; 2653 int rcnt; 2654 int exitval = EX_OK; 2655 int lac; 2656 char **lav; 2657 char *endptr; 2658 size_t readsz; 2659 struct buf_pr bp; 2660 ipfw_obj_ctlv *ctlv, *tstate; 2661 ipfw_obj_tlv *rbase; 2662 2663 /* 2664 * Handle tablenames TLV first, if any 2665 */ 2666 tstate = NULL; 2667 rbase = NULL; 2668 dynbase = NULL; 2669 dynsz = 0; 2670 readsz = sizeof(*cfg); 2671 rcnt = 0; 2672 2673 fo->set_mask = cfg->set_mask; 2674 2675 ctlv = (ipfw_obj_ctlv *)(cfg + 1); 2676 2677 if (cfg->flags & IPFW_CFG_GET_STATIC) { 2678 /* We've requested static rules */ 2679 if (ctlv->head.type == IPFW_TLV_TBLNAME_LIST) { 2680 object_sort_ctlv(ctlv); 2681 fo->tstate = ctlv; 2682 readsz += ctlv->head.length; 2683 ctlv = (ipfw_obj_ctlv *)((caddr_t)ctlv + 2684 ctlv->head.length); 2685 } 2686 2687 if (ctlv->head.type == IPFW_TLV_RULE_LIST) { 2688 rbase = (ipfw_obj_tlv *)(ctlv + 1); 2689 rcnt = ctlv->count; 2690 readsz += ctlv->head.length; 2691 ctlv = (ipfw_obj_ctlv *)((caddr_t)ctlv + 2692 ctlv->head.length); 2693 } 2694 } 2695 2696 if ((cfg->flags & IPFW_CFG_GET_STATES) && (readsz != sz)) { 2697 /* We may have some dynamic states */ 2698 dynsz = sz - readsz; 2699 /* Skip empty header */ 2700 if (dynsz != sizeof(ipfw_obj_ctlv)) 2701 dynbase = (caddr_t)ctlv; 2702 else 2703 dynsz = 0; 2704 } 2705 2706 prepare_format_opts(co, fo, rbase, rcnt, dynbase, dynsz); 2707 bp_alloc(&bp, 4096); 2708 2709 /* if no rule numbers were specified, list all rules */ 2710 if (ac == 0) { 2711 fo->first = 0; 2712 fo->last = IPFW_DEFAULT_RULE; 2713 list_static_range(co, fo, &bp, rbase, rcnt); 2714 2715 if (co->do_dynamic && dynsz > 0) { 2716 printf("## Dynamic rules (%d %zu):\n", fo->dcnt, dynsz); 2717 list_dyn_range(co, fo, &bp, dynbase, dynsz); 2718 } 2719 2720 bp_free(&bp); 2721 return (EX_OK); 2722 } 2723 2724 /* display specific rules requested on command line */ 2725 for (lac = ac, lav = av; lac != 0; lac--) { 2726 /* convert command line rule # */ 2727 fo->last = fo->first = strtoul(*lav++, &endptr, 10); 2728 if (*endptr == '-') 2729 fo->last = strtoul(endptr + 1, &endptr, 10); 2730 if (*endptr) { 2731 exitval = EX_USAGE; 2732 warnx("invalid rule number: %s", *(lav - 1)); 2733 continue; 2734 } 2735 2736 if (list_static_range(co, fo, &bp, rbase, rcnt) == 0) { 2737 /* give precedence to other error(s) */ 2738 if (exitval == EX_OK) 2739 exitval = EX_UNAVAILABLE; 2740 if (fo->first == fo->last) 2741 warnx("rule %u does not exist", fo->first); 2742 else 2743 warnx("no rules in range %u-%u", 2744 fo->first, fo->last); 2745 } 2746 } 2747 2748 if (co->do_dynamic && dynsz > 0) { 2749 printf("## Dynamic rules:\n"); 2750 for (lac = ac, lav = av; lac != 0; lac--) { 2751 fo->last = fo->first = strtoul(*lav++, &endptr, 10); 2752 if (*endptr == '-') 2753 fo->last = strtoul(endptr+1, &endptr, 10); 2754 if (*endptr) 2755 /* already warned */ 2756 continue; 2757 list_dyn_range(co, fo, &bp, dynbase, dynsz); 2758 } 2759 } 2760 2761 bp_free(&bp); 2762 return (exitval); 2763 } 2764 2765 2766 /* 2767 * Retrieves current ipfw configuration of given type 2768 * and stores its pointer to @pcfg. 2769 * 2770 * Caller is responsible for freeing @pcfg. 2771 * 2772 * Returns 0 on success. 2773 */ 2774 2775 static int 2776 ipfw_get_config(struct cmdline_opts *co, struct format_opts *fo, 2777 ipfw_cfg_lheader **pcfg, size_t *psize) 2778 { 2779 ipfw_cfg_lheader *cfg; 2780 size_t sz; 2781 int i; 2782 2783 2784 if (co->test_only != 0) { 2785 fprintf(stderr, "Testing only, list disabled\n"); 2786 return (0); 2787 } 2788 2789 /* Start with some data size */ 2790 sz = 4096; 2791 cfg = NULL; 2792 2793 for (i = 0; i < 16; i++) { 2794 if (cfg != NULL) 2795 free(cfg); 2796 if ((cfg = calloc(1, sz)) == NULL) 2797 return (ENOMEM); 2798 2799 cfg->flags = fo->flags; 2800 cfg->start_rule = fo->first; 2801 cfg->end_rule = fo->last; 2802 2803 if (do_get3(IP_FW_XGET, &cfg->opheader, &sz) != 0) { 2804 if (errno != ENOMEM) { 2805 free(cfg); 2806 return (errno); 2807 } 2808 2809 /* Buffer size is not enough. Try to increase */ 2810 sz = sz * 2; 2811 if (sz < cfg->size) 2812 sz = cfg->size; 2813 continue; 2814 } 2815 2816 *pcfg = cfg; 2817 *psize = sz; 2818 return (0); 2819 } 2820 2821 free(cfg); 2822 return (ENOMEM); 2823 } 2824 2825 static int 2826 lookup_host (char *host, struct in_addr *ipaddr) 2827 { 2828 struct hostent *he; 2829 2830 if (!inet_aton(host, ipaddr)) { 2831 if ((he = gethostbyname(host)) == NULL) 2832 return(-1); 2833 *ipaddr = *(struct in_addr *)he->h_addr_list[0]; 2834 } 2835 return(0); 2836 } 2837 2838 struct tidx { 2839 ipfw_obj_ntlv *idx; 2840 uint32_t count; 2841 uint32_t size; 2842 uint16_t counter; 2843 uint8_t set; 2844 }; 2845 2846 int 2847 ipfw_check_object_name(const char *name) 2848 { 2849 int c, i, l; 2850 2851 /* 2852 * Check that name is null-terminated and contains 2853 * valid symbols only. Valid mask is: 2854 * [a-zA-Z0-9\-_\.]{1,63} 2855 */ 2856 l = strlen(name); 2857 if (l == 0 || l >= 64) 2858 return (EINVAL); 2859 for (i = 0; i < l; i++) { 2860 c = name[i]; 2861 if (isalpha(c) || isdigit(c) || c == '_' || 2862 c == '-' || c == '.') 2863 continue; 2864 return (EINVAL); 2865 } 2866 return (0); 2867 } 2868 2869 static char *default_state_name = "default"; 2870 static int 2871 state_check_name(const char *name) 2872 { 2873 2874 if (ipfw_check_object_name(name) != 0) 2875 return (EINVAL); 2876 if (strcmp(name, "any") == 0) 2877 return (EINVAL); 2878 return (0); 2879 } 2880 2881 static int 2882 eaction_check_name(const char *name) 2883 { 2884 2885 if (ipfw_check_object_name(name) != 0) 2886 return (EINVAL); 2887 /* Restrict some 'special' names */ 2888 if (match_token(rule_actions, name) != -1 && 2889 match_token(rule_action_params, name) != -1) 2890 return (EINVAL); 2891 return (0); 2892 } 2893 2894 static uint16_t 2895 pack_object(struct tidx *tstate, char *name, int otype) 2896 { 2897 int i; 2898 ipfw_obj_ntlv *ntlv; 2899 2900 for (i = 0; i < tstate->count; i++) { 2901 if (strcmp(tstate->idx[i].name, name) != 0) 2902 continue; 2903 if (tstate->idx[i].set != tstate->set) 2904 continue; 2905 if (tstate->idx[i].head.type != otype) 2906 continue; 2907 2908 return (tstate->idx[i].idx); 2909 } 2910 2911 if (tstate->count + 1 > tstate->size) { 2912 tstate->size += 4; 2913 tstate->idx = realloc(tstate->idx, tstate->size * 2914 sizeof(ipfw_obj_ntlv)); 2915 if (tstate->idx == NULL) 2916 return (0); 2917 } 2918 2919 ntlv = &tstate->idx[i]; 2920 memset(ntlv, 0, sizeof(ipfw_obj_ntlv)); 2921 strlcpy(ntlv->name, name, sizeof(ntlv->name)); 2922 ntlv->head.type = otype; 2923 ntlv->head.length = sizeof(ipfw_obj_ntlv); 2924 ntlv->set = tstate->set; 2925 ntlv->idx = ++tstate->counter; 2926 tstate->count++; 2927 2928 return (ntlv->idx); 2929 } 2930 2931 static uint16_t 2932 pack_table(struct tidx *tstate, char *name) 2933 { 2934 2935 if (table_check_name(name) != 0) 2936 return (0); 2937 2938 return (pack_object(tstate, name, IPFW_TLV_TBL_NAME)); 2939 } 2940 2941 void 2942 fill_table(struct _ipfw_insn *cmd, char *av, uint8_t opcode, 2943 struct tidx *tstate) 2944 { 2945 uint32_t *d = ((ipfw_insn_u32 *)cmd)->d; 2946 uint16_t uidx; 2947 char *p; 2948 2949 if ((p = strchr(av + 6, ')')) == NULL) 2950 errx(EX_DATAERR, "forgotten parenthesis: '%s'", av); 2951 *p = '\0'; 2952 p = strchr(av + 6, ','); 2953 if (p) 2954 *p++ = '\0'; 2955 2956 if ((uidx = pack_table(tstate, av + 6)) == 0) 2957 errx(EX_DATAERR, "Invalid table name: %s", av + 6); 2958 2959 cmd->opcode = opcode; 2960 cmd->arg1 = uidx; 2961 if (p) { 2962 cmd->len |= F_INSN_SIZE(ipfw_insn_u32); 2963 d[0] = strtoul(p, NULL, 0); 2964 } else 2965 cmd->len |= F_INSN_SIZE(ipfw_insn); 2966 } 2967 2968 2969 /* 2970 * fills the addr and mask fields in the instruction as appropriate from av. 2971 * Update length as appropriate. 2972 * The following formats are allowed: 2973 * me returns O_IP_*_ME 2974 * 1.2.3.4 single IP address 2975 * 1.2.3.4:5.6.7.8 address:mask 2976 * 1.2.3.4/24 address/mask 2977 * 1.2.3.4/26{1,6,5,4,23} set of addresses in a subnet 2978 * We can have multiple comma-separated address/mask entries. 2979 */ 2980 static void 2981 fill_ip(ipfw_insn_ip *cmd, char *av, int cblen, struct tidx *tstate) 2982 { 2983 int len = 0; 2984 uint32_t *d = ((ipfw_insn_u32 *)cmd)->d; 2985 2986 cmd->o.len &= ~F_LEN_MASK; /* zero len */ 2987 2988 if (_substrcmp(av, "any") == 0) 2989 return; 2990 2991 if (_substrcmp(av, "me") == 0) { 2992 cmd->o.len |= F_INSN_SIZE(ipfw_insn); 2993 return; 2994 } 2995 2996 if (strncmp(av, "table(", 6) == 0) { 2997 fill_table(&cmd->o, av, O_IP_DST_LOOKUP, tstate); 2998 return; 2999 } 3000 3001 while (av) { 3002 /* 3003 * After the address we can have '/' or ':' indicating a mask, 3004 * ',' indicating another address follows, '{' indicating a 3005 * set of addresses of unspecified size. 3006 */ 3007 char *t = NULL, *p = strpbrk(av, "/:,{"); 3008 int masklen; 3009 char md, nd = '\0'; 3010 3011 CHECK_LENGTH(cblen, F_INSN_SIZE(ipfw_insn) + 2 + len); 3012 3013 if (p) { 3014 md = *p; 3015 *p++ = '\0'; 3016 if ((t = strpbrk(p, ",{")) != NULL) { 3017 nd = *t; 3018 *t = '\0'; 3019 } 3020 } else 3021 md = '\0'; 3022 3023 if (lookup_host(av, (struct in_addr *)&d[0]) != 0) 3024 errx(EX_NOHOST, "hostname ``%s'' unknown", av); 3025 switch (md) { 3026 case ':': 3027 if (!inet_aton(p, (struct in_addr *)&d[1])) 3028 errx(EX_DATAERR, "bad netmask ``%s''", p); 3029 break; 3030 case '/': 3031 masklen = atoi(p); 3032 if (masklen == 0) 3033 d[1] = htonl(0U); /* mask */ 3034 else if (masklen > 32) 3035 errx(EX_DATAERR, "bad width ``%s''", p); 3036 else 3037 d[1] = htonl(~0U << (32 - masklen)); 3038 break; 3039 case '{': /* no mask, assume /24 and put back the '{' */ 3040 d[1] = htonl(~0U << (32 - 24)); 3041 *(--p) = md; 3042 break; 3043 3044 case ',': /* single address plus continuation */ 3045 *(--p) = md; 3046 /* FALLTHROUGH */ 3047 case 0: /* initialization value */ 3048 default: 3049 d[1] = htonl(~0U); /* force /32 */ 3050 break; 3051 } 3052 d[0] &= d[1]; /* mask base address with mask */ 3053 if (t) 3054 *t = nd; 3055 /* find next separator */ 3056 if (p) 3057 p = strpbrk(p, ",{"); 3058 if (p && *p == '{') { 3059 /* 3060 * We have a set of addresses. They are stored as follows: 3061 * arg1 is the set size (powers of 2, 2..256) 3062 * addr is the base address IN HOST FORMAT 3063 * mask.. is an array of arg1 bits (rounded up to 3064 * the next multiple of 32) with bits set 3065 * for each host in the map. 3066 */ 3067 uint32_t *map = (uint32_t *)&cmd->mask; 3068 int low, high; 3069 int i = contigmask((uint8_t *)&(d[1]), 32); 3070 3071 if (len > 0) 3072 errx(EX_DATAERR, "address set cannot be in a list"); 3073 if (i < 24 || i > 31) 3074 errx(EX_DATAERR, "invalid set with mask %d\n", i); 3075 cmd->o.arg1 = 1<<(32-i); /* map length */ 3076 d[0] = ntohl(d[0]); /* base addr in host format */ 3077 cmd->o.opcode = O_IP_DST_SET; /* default */ 3078 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32) + (cmd->o.arg1+31)/32; 3079 for (i = 0; i < (cmd->o.arg1+31)/32 ; i++) 3080 map[i] = 0; /* clear map */ 3081 3082 av = p + 1; 3083 low = d[0] & 0xff; 3084 high = low + cmd->o.arg1 - 1; 3085 /* 3086 * Here, i stores the previous value when we specify a range 3087 * of addresses within a mask, e.g. 45-63. i = -1 means we 3088 * have no previous value. 3089 */ 3090 i = -1; /* previous value in a range */ 3091 while (isdigit(*av)) { 3092 char *s; 3093 int a = strtol(av, &s, 0); 3094 3095 if (s == av) { /* no parameter */ 3096 if (*av != '}') 3097 errx(EX_DATAERR, "set not closed\n"); 3098 if (i != -1) 3099 errx(EX_DATAERR, "incomplete range %d-", i); 3100 break; 3101 } 3102 if (a < low || a > high) 3103 errx(EX_DATAERR, "addr %d out of range [%d-%d]\n", 3104 a, low, high); 3105 a -= low; 3106 if (i == -1) /* no previous in range */ 3107 i = a; 3108 else { /* check that range is valid */ 3109 if (i > a) 3110 errx(EX_DATAERR, "invalid range %d-%d", 3111 i+low, a+low); 3112 if (*s == '-') 3113 errx(EX_DATAERR, "double '-' in range"); 3114 } 3115 for (; i <= a; i++) 3116 map[i/32] |= 1<<(i & 31); 3117 i = -1; 3118 if (*s == '-') 3119 i = a; 3120 else if (*s == '}') 3121 break; 3122 av = s+1; 3123 } 3124 return; 3125 } 3126 av = p; 3127 if (av) /* then *av must be a ',' */ 3128 av++; 3129 3130 /* Check this entry */ 3131 if (d[1] == 0) { /* "any", specified as x.x.x.x/0 */ 3132 /* 3133 * 'any' turns the entire list into a NOP. 3134 * 'not any' never matches, so it is removed from the 3135 * list unless it is the only item, in which case we 3136 * report an error. 3137 */ 3138 if (cmd->o.len & F_NOT) { /* "not any" never matches */ 3139 if (av == NULL && len == 0) /* only this entry */ 3140 errx(EX_DATAERR, "not any never matches"); 3141 } 3142 /* else do nothing and skip this entry */ 3143 return; 3144 } 3145 /* A single IP can be stored in an optimized format */ 3146 if (d[1] == (uint32_t)~0 && av == NULL && len == 0) { 3147 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32); 3148 return; 3149 } 3150 len += 2; /* two words... */ 3151 d += 2; 3152 } /* end while */ 3153 if (len + 1 > F_LEN_MASK) 3154 errx(EX_DATAERR, "address list too long"); 3155 cmd->o.len |= len+1; 3156 } 3157 3158 3159 /* n2mask sets n bits of the mask */ 3160 void 3161 n2mask(struct in6_addr *mask, int n) 3162 { 3163 static int minimask[9] = 3164 { 0x00, 0x80, 0xc0, 0xe0, 0xf0, 0xf8, 0xfc, 0xfe, 0xff }; 3165 u_char *p; 3166 3167 memset(mask, 0, sizeof(struct in6_addr)); 3168 p = (u_char *) mask; 3169 for (; n > 0; p++, n -= 8) { 3170 if (n >= 8) 3171 *p = 0xff; 3172 else 3173 *p = minimask[n]; 3174 } 3175 return; 3176 } 3177 3178 static void 3179 fill_flags_cmd(ipfw_insn *cmd, enum ipfw_opcodes opcode, 3180 struct _s_x *flags, char *p) 3181 { 3182 char *e; 3183 uint32_t set = 0, clear = 0; 3184 3185 if (fill_flags(flags, p, &e, &set, &clear) != 0) 3186 errx(EX_DATAERR, "invalid flag %s", e); 3187 3188 cmd->opcode = opcode; 3189 cmd->len = (cmd->len & (F_NOT | F_OR)) | 1; 3190 cmd->arg1 = (set & 0xff) | ( (clear & 0xff) << 8); 3191 } 3192 3193 3194 void 3195 ipfw_delete(char *av[]) 3196 { 3197 ipfw_range_tlv rt; 3198 char *sep; 3199 int i, j; 3200 int exitval = EX_OK; 3201 int do_set = 0; 3202 3203 av++; 3204 NEED1("missing rule specification"); 3205 if ( *av && _substrcmp(*av, "set") == 0) { 3206 /* Do not allow using the following syntax: 3207 * ipfw set N delete set M 3208 */ 3209 if (co.use_set) 3210 errx(EX_DATAERR, "invalid syntax"); 3211 do_set = 1; /* delete set */ 3212 av++; 3213 } 3214 3215 /* Rule number */ 3216 while (*av && isdigit(**av)) { 3217 i = strtol(*av, &sep, 10); 3218 j = i; 3219 if (*sep== '-') 3220 j = strtol(sep + 1, NULL, 10); 3221 av++; 3222 if (co.do_nat) { 3223 exitval = do_cmd(IP_FW_NAT_DEL, &i, sizeof i); 3224 if (exitval) { 3225 exitval = EX_UNAVAILABLE; 3226 warn("rule %u not available", i); 3227 } 3228 } else if (co.do_pipe) { 3229 exitval = ipfw_delete_pipe(co.do_pipe, i); 3230 } else { 3231 memset(&rt, 0, sizeof(rt)); 3232 if (do_set != 0) { 3233 rt.set = i & 31; 3234 rt.flags = IPFW_RCFLAG_SET; 3235 } else { 3236 rt.start_rule = i & 0xffff; 3237 rt.end_rule = j & 0xffff; 3238 if (rt.start_rule == 0 && rt.end_rule == 0) 3239 rt.flags |= IPFW_RCFLAG_ALL; 3240 else 3241 rt.flags |= IPFW_RCFLAG_RANGE; 3242 if (co.use_set != 0) { 3243 rt.set = co.use_set - 1; 3244 rt.flags |= IPFW_RCFLAG_SET; 3245 } 3246 } 3247 i = do_range_cmd(IP_FW_XDEL, &rt); 3248 if (i != 0) { 3249 exitval = EX_UNAVAILABLE; 3250 warn("rule %u: setsockopt(IP_FW_XDEL)", 3251 rt.start_rule); 3252 } else if (rt.new_set == 0 && do_set == 0) { 3253 exitval = EX_UNAVAILABLE; 3254 if (rt.start_rule != rt.end_rule) 3255 warnx("no rules rules in %u-%u range", 3256 rt.start_rule, rt.end_rule); 3257 else 3258 warnx("rule %u not found", 3259 rt.start_rule); 3260 } 3261 } 3262 } 3263 if (exitval != EX_OK) 3264 exit(exitval); 3265 } 3266 3267 3268 /* 3269 * fill the interface structure. We do not check the name as we can 3270 * create interfaces dynamically, so checking them at insert time 3271 * makes relatively little sense. 3272 * Interface names containing '*', '?', or '[' are assumed to be shell 3273 * patterns which match interfaces. 3274 */ 3275 static void 3276 fill_iface(ipfw_insn_if *cmd, char *arg, int cblen, struct tidx *tstate) 3277 { 3278 char *p; 3279 uint16_t uidx; 3280 3281 cmd->name[0] = '\0'; 3282 cmd->o.len |= F_INSN_SIZE(ipfw_insn_if); 3283 3284 CHECK_CMDLEN; 3285 3286 /* Parse the interface or address */ 3287 if (strcmp(arg, "any") == 0) 3288 cmd->o.len = 0; /* effectively ignore this command */ 3289 else if (strncmp(arg, "table(", 6) == 0) { 3290 if ((p = strchr(arg + 6, ')')) == NULL) 3291 errx(EX_DATAERR, "forgotten parenthesis: '%s'", arg); 3292 *p = '\0'; 3293 p = strchr(arg + 6, ','); 3294 if (p) 3295 *p++ = '\0'; 3296 if ((uidx = pack_table(tstate, arg + 6)) == 0) 3297 errx(EX_DATAERR, "Invalid table name: %s", arg + 6); 3298 3299 cmd->name[0] = '\1'; /* Special value indicating table */ 3300 cmd->p.kidx = uidx; 3301 } else if (!isdigit(*arg)) { 3302 strlcpy(cmd->name, arg, sizeof(cmd->name)); 3303 cmd->p.glob = strpbrk(arg, "*?[") != NULL ? 1 : 0; 3304 } else if (!inet_aton(arg, &cmd->p.ip)) 3305 errx(EX_DATAERR, "bad ip address ``%s''", arg); 3306 } 3307 3308 static void 3309 get_mac_addr_mask(const char *p, uint8_t *addr, uint8_t *mask) 3310 { 3311 int i; 3312 size_t l; 3313 char *ap, *ptr, *optr; 3314 struct ether_addr *mac; 3315 const char *macset = "0123456789abcdefABCDEF:"; 3316 3317 if (strcmp(p, "any") == 0) { 3318 for (i = 0; i < ETHER_ADDR_LEN; i++) 3319 addr[i] = mask[i] = 0; 3320 return; 3321 } 3322 3323 optr = ptr = strdup(p); 3324 if ((ap = strsep(&ptr, "&/")) != NULL && *ap != 0) { 3325 l = strlen(ap); 3326 if (strspn(ap, macset) != l || (mac = ether_aton(ap)) == NULL) 3327 errx(EX_DATAERR, "Incorrect MAC address"); 3328 bcopy(mac, addr, ETHER_ADDR_LEN); 3329 } else 3330 errx(EX_DATAERR, "Incorrect MAC address"); 3331 3332 if (ptr != NULL) { /* we have mask? */ 3333 if (p[ptr - optr - 1] == '/') { /* mask len */ 3334 long ml = strtol(ptr, &ap, 10); 3335 if (*ap != 0 || ml > ETHER_ADDR_LEN * 8 || ml < 0) 3336 errx(EX_DATAERR, "Incorrect mask length"); 3337 for (i = 0; ml > 0 && i < ETHER_ADDR_LEN; ml -= 8, i++) 3338 mask[i] = (ml >= 8) ? 0xff: (~0) << (8 - ml); 3339 } else { /* mask */ 3340 l = strlen(ptr); 3341 if (strspn(ptr, macset) != l || 3342 (mac = ether_aton(ptr)) == NULL) 3343 errx(EX_DATAERR, "Incorrect mask"); 3344 bcopy(mac, mask, ETHER_ADDR_LEN); 3345 } 3346 } else { /* default mask: ff:ff:ff:ff:ff:ff */ 3347 for (i = 0; i < ETHER_ADDR_LEN; i++) 3348 mask[i] = 0xff; 3349 } 3350 for (i = 0; i < ETHER_ADDR_LEN; i++) 3351 addr[i] &= mask[i]; 3352 3353 free(optr); 3354 } 3355 3356 /* 3357 * helper function, updates the pointer to cmd with the length 3358 * of the current command, and also cleans up the first word of 3359 * the new command in case it has been clobbered before. 3360 */ 3361 static ipfw_insn * 3362 next_cmd(ipfw_insn *cmd, int *len) 3363 { 3364 *len -= F_LEN(cmd); 3365 CHECK_LENGTH(*len, 0); 3366 cmd += F_LEN(cmd); 3367 bzero(cmd, sizeof(*cmd)); 3368 return cmd; 3369 } 3370 3371 /* 3372 * Takes arguments and copies them into a comment 3373 */ 3374 static void 3375 fill_comment(ipfw_insn *cmd, char **av, int cblen) 3376 { 3377 int i, l; 3378 char *p = (char *)(cmd + 1); 3379 3380 cmd->opcode = O_NOP; 3381 cmd->len = (cmd->len & (F_NOT | F_OR)); 3382 3383 /* Compute length of comment string. */ 3384 for (i = 0, l = 0; av[i] != NULL; i++) 3385 l += strlen(av[i]) + 1; 3386 if (l == 0) 3387 return; 3388 if (l > 84) 3389 errx(EX_DATAERR, 3390 "comment too long (max 80 chars)"); 3391 l = 1 + (l+3)/4; 3392 cmd->len = (cmd->len & (F_NOT | F_OR)) | l; 3393 CHECK_CMDLEN; 3394 3395 for (i = 0; av[i] != NULL; i++) { 3396 strcpy(p, av[i]); 3397 p += strlen(av[i]); 3398 *p++ = ' '; 3399 } 3400 *(--p) = '\0'; 3401 } 3402 3403 /* 3404 * A function to fill simple commands of size 1. 3405 * Existing flags are preserved. 3406 */ 3407 static void 3408 fill_cmd(ipfw_insn *cmd, enum ipfw_opcodes opcode, int flags, uint16_t arg) 3409 { 3410 cmd->opcode = opcode; 3411 cmd->len = ((cmd->len | flags) & (F_NOT | F_OR)) | 1; 3412 cmd->arg1 = arg; 3413 } 3414 3415 /* 3416 * Fetch and add the MAC address and type, with masks. This generates one or 3417 * two microinstructions, and returns the pointer to the last one. 3418 */ 3419 static ipfw_insn * 3420 add_mac(ipfw_insn *cmd, char *av[], int cblen) 3421 { 3422 ipfw_insn_mac *mac; 3423 3424 if ( ( av[0] == NULL ) || ( av[1] == NULL ) ) 3425 errx(EX_DATAERR, "MAC dst src"); 3426 3427 cmd->opcode = O_MACADDR2; 3428 cmd->len = (cmd->len & (F_NOT | F_OR)) | F_INSN_SIZE(ipfw_insn_mac); 3429 CHECK_CMDLEN; 3430 3431 mac = (ipfw_insn_mac *)cmd; 3432 get_mac_addr_mask(av[0], mac->addr, mac->mask); /* dst */ 3433 get_mac_addr_mask(av[1], &(mac->addr[ETHER_ADDR_LEN]), 3434 &(mac->mask[ETHER_ADDR_LEN])); /* src */ 3435 return cmd; 3436 } 3437 3438 static ipfw_insn * 3439 add_mactype(ipfw_insn *cmd, char *av, int cblen) 3440 { 3441 if (!av) 3442 errx(EX_DATAERR, "missing MAC type"); 3443 if (strcmp(av, "any") != 0) { /* we have a non-null type */ 3444 fill_newports((ipfw_insn_u16 *)cmd, av, IPPROTO_ETHERTYPE, 3445 cblen); 3446 cmd->opcode = O_MAC_TYPE; 3447 return cmd; 3448 } else 3449 return NULL; 3450 } 3451 3452 static ipfw_insn * 3453 add_proto0(ipfw_insn *cmd, char *av, u_char *protop) 3454 { 3455 struct protoent *pe; 3456 char *ep; 3457 int proto; 3458 3459 proto = strtol(av, &ep, 10); 3460 if (*ep != '\0' || proto <= 0) { 3461 if ((pe = getprotobyname(av)) == NULL) 3462 return NULL; 3463 proto = pe->p_proto; 3464 } 3465 3466 fill_cmd(cmd, O_PROTO, 0, proto); 3467 *protop = proto; 3468 return cmd; 3469 } 3470 3471 static ipfw_insn * 3472 add_proto(ipfw_insn *cmd, char *av, u_char *protop) 3473 { 3474 u_char proto = IPPROTO_IP; 3475 3476 if (_substrcmp(av, "all") == 0 || strcmp(av, "ip") == 0) 3477 ; /* do not set O_IP4 nor O_IP6 */ 3478 else if (strcmp(av, "ip4") == 0) 3479 /* explicit "just IPv4" rule */ 3480 fill_cmd(cmd, O_IP4, 0, 0); 3481 else if (strcmp(av, "ip6") == 0) { 3482 /* explicit "just IPv6" rule */ 3483 proto = IPPROTO_IPV6; 3484 fill_cmd(cmd, O_IP6, 0, 0); 3485 } else 3486 return add_proto0(cmd, av, protop); 3487 3488 *protop = proto; 3489 return cmd; 3490 } 3491 3492 static ipfw_insn * 3493 add_proto_compat(ipfw_insn *cmd, char *av, u_char *protop) 3494 { 3495 u_char proto = IPPROTO_IP; 3496 3497 if (_substrcmp(av, "all") == 0 || strcmp(av, "ip") == 0) 3498 ; /* do not set O_IP4 nor O_IP6 */ 3499 else if (strcmp(av, "ipv4") == 0 || strcmp(av, "ip4") == 0) 3500 /* explicit "just IPv4" rule */ 3501 fill_cmd(cmd, O_IP4, 0, 0); 3502 else if (strcmp(av, "ipv6") == 0 || strcmp(av, "ip6") == 0) { 3503 /* explicit "just IPv6" rule */ 3504 proto = IPPROTO_IPV6; 3505 fill_cmd(cmd, O_IP6, 0, 0); 3506 } else 3507 return add_proto0(cmd, av, protop); 3508 3509 *protop = proto; 3510 return cmd; 3511 } 3512 3513 static ipfw_insn * 3514 add_srcip(ipfw_insn *cmd, char *av, int cblen, struct tidx *tstate) 3515 { 3516 fill_ip((ipfw_insn_ip *)cmd, av, cblen, tstate); 3517 if (cmd->opcode == O_IP_DST_SET) /* set */ 3518 cmd->opcode = O_IP_SRC_SET; 3519 else if (cmd->opcode == O_IP_DST_LOOKUP) /* table */ 3520 cmd->opcode = O_IP_SRC_LOOKUP; 3521 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn)) /* me */ 3522 cmd->opcode = O_IP_SRC_ME; 3523 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_u32)) /* one IP */ 3524 cmd->opcode = O_IP_SRC; 3525 else /* addr/mask */ 3526 cmd->opcode = O_IP_SRC_MASK; 3527 return cmd; 3528 } 3529 3530 static ipfw_insn * 3531 add_dstip(ipfw_insn *cmd, char *av, int cblen, struct tidx *tstate) 3532 { 3533 fill_ip((ipfw_insn_ip *)cmd, av, cblen, tstate); 3534 if (cmd->opcode == O_IP_DST_SET) /* set */ 3535 ; 3536 else if (cmd->opcode == O_IP_DST_LOOKUP) /* table */ 3537 ; 3538 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn)) /* me */ 3539 cmd->opcode = O_IP_DST_ME; 3540 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_u32)) /* one IP */ 3541 cmd->opcode = O_IP_DST; 3542 else /* addr/mask */ 3543 cmd->opcode = O_IP_DST_MASK; 3544 return cmd; 3545 } 3546 3547 static struct _s_x f_reserved_keywords[] = { 3548 { "altq", TOK_OR }, 3549 { "//", TOK_OR }, 3550 { "diverted", TOK_OR }, 3551 { "dst-port", TOK_OR }, 3552 { "src-port", TOK_OR }, 3553 { "established", TOK_OR }, 3554 { "keep-state", TOK_OR }, 3555 { "frag", TOK_OR }, 3556 { "icmptypes", TOK_OR }, 3557 { "in", TOK_OR }, 3558 { "out", TOK_OR }, 3559 { "ip6", TOK_OR }, 3560 { "any", TOK_OR }, 3561 { "to", TOK_OR }, 3562 { "via", TOK_OR }, 3563 { "{", TOK_OR }, 3564 { NULL, 0 } /* terminator */ 3565 }; 3566 3567 static ipfw_insn * 3568 add_ports(ipfw_insn *cmd, char *av, u_char proto, int opcode, int cblen) 3569 { 3570 3571 if (match_token(f_reserved_keywords, av) != -1) 3572 return (NULL); 3573 3574 if (fill_newports((ipfw_insn_u16 *)cmd, av, proto, cblen)) { 3575 /* XXX todo: check that we have a protocol with ports */ 3576 cmd->opcode = opcode; 3577 return cmd; 3578 } 3579 return NULL; 3580 } 3581 3582 static ipfw_insn * 3583 add_src(ipfw_insn *cmd, char *av, u_char proto, int cblen, struct tidx *tstate) 3584 { 3585 struct in6_addr a; 3586 char *host, *ch, buf[INET6_ADDRSTRLEN]; 3587 ipfw_insn *ret = NULL; 3588 int len; 3589 3590 /* Copy first address in set if needed */ 3591 if ((ch = strpbrk(av, "/,")) != NULL) { 3592 len = ch - av; 3593 strlcpy(buf, av, sizeof(buf)); 3594 if (len < sizeof(buf)) 3595 buf[len] = '\0'; 3596 host = buf; 3597 } else 3598 host = av; 3599 3600 if (proto == IPPROTO_IPV6 || strcmp(av, "me6") == 0 || 3601 inet_pton(AF_INET6, host, &a) == 1) 3602 ret = add_srcip6(cmd, av, cblen, tstate); 3603 /* XXX: should check for IPv4, not !IPv6 */ 3604 if (ret == NULL && (proto == IPPROTO_IP || strcmp(av, "me") == 0 || 3605 inet_pton(AF_INET6, host, &a) != 1)) 3606 ret = add_srcip(cmd, av, cblen, tstate); 3607 if (ret == NULL && strcmp(av, "any") != 0) 3608 ret = cmd; 3609 3610 return ret; 3611 } 3612 3613 static ipfw_insn * 3614 add_dst(ipfw_insn *cmd, char *av, u_char proto, int cblen, struct tidx *tstate) 3615 { 3616 struct in6_addr a; 3617 char *host, *ch, buf[INET6_ADDRSTRLEN]; 3618 ipfw_insn *ret = NULL; 3619 int len; 3620 3621 /* Copy first address in set if needed */ 3622 if ((ch = strpbrk(av, "/,")) != NULL) { 3623 len = ch - av; 3624 strlcpy(buf, av, sizeof(buf)); 3625 if (len < sizeof(buf)) 3626 buf[len] = '\0'; 3627 host = buf; 3628 } else 3629 host = av; 3630 3631 if (proto == IPPROTO_IPV6 || strcmp(av, "me6") == 0 || 3632 inet_pton(AF_INET6, host, &a) == 1) 3633 ret = add_dstip6(cmd, av, cblen, tstate); 3634 /* XXX: should check for IPv4, not !IPv6 */ 3635 if (ret == NULL && (proto == IPPROTO_IP || strcmp(av, "me") == 0 || 3636 inet_pton(AF_INET6, host, &a) != 1)) 3637 ret = add_dstip(cmd, av, cblen, tstate); 3638 if (ret == NULL && strcmp(av, "any") != 0) 3639 ret = cmd; 3640 3641 return ret; 3642 } 3643 3644 /* 3645 * Parse arguments and assemble the microinstructions which make up a rule. 3646 * Rules are added into the 'rulebuf' and then copied in the correct order 3647 * into the actual rule. 3648 * 3649 * The syntax for a rule starts with the action, followed by 3650 * optional action parameters, and the various match patterns. 3651 * In the assembled microcode, the first opcode must be an O_PROBE_STATE 3652 * (generated if the rule includes a keep-state option), then the 3653 * various match patterns, log/altq actions, and the actual action. 3654 * 3655 */ 3656 void 3657 compile_rule(char *av[], uint32_t *rbuf, int *rbufsize, struct tidx *tstate) 3658 { 3659 /* 3660 * rules are added into the 'rulebuf' and then copied in 3661 * the correct order into the actual rule. 3662 * Some things that need to go out of order (prob, action etc.) 3663 * go into actbuf[]. 3664 */ 3665 static uint32_t actbuf[255], cmdbuf[255]; 3666 int rblen, ablen, cblen; 3667 3668 ipfw_insn *src, *dst, *cmd, *action, *prev=NULL; 3669 ipfw_insn *first_cmd; /* first match pattern */ 3670 3671 struct ip_fw_rule *rule; 3672 3673 /* 3674 * various flags used to record that we entered some fields. 3675 */ 3676 ipfw_insn *have_state = NULL; /* check-state or keep-state */ 3677 ipfw_insn *have_log = NULL, *have_altq = NULL, *have_tag = NULL; 3678 size_t len; 3679 3680 int i; 3681 3682 int open_par = 0; /* open parenthesis ( */ 3683 3684 /* proto is here because it is used to fetch ports */ 3685 u_char proto = IPPROTO_IP; /* default protocol */ 3686 3687 double match_prob = 1; /* match probability, default is always match */ 3688 3689 bzero(actbuf, sizeof(actbuf)); /* actions go here */ 3690 bzero(cmdbuf, sizeof(cmdbuf)); 3691 bzero(rbuf, *rbufsize); 3692 3693 rule = (struct ip_fw_rule *)rbuf; 3694 cmd = (ipfw_insn *)cmdbuf; 3695 action = (ipfw_insn *)actbuf; 3696 3697 rblen = *rbufsize / sizeof(uint32_t); 3698 rblen -= sizeof(struct ip_fw_rule) / sizeof(uint32_t); 3699 ablen = sizeof(actbuf) / sizeof(actbuf[0]); 3700 cblen = sizeof(cmdbuf) / sizeof(cmdbuf[0]); 3701 cblen -= F_INSN_SIZE(ipfw_insn_u32) + 1; 3702 3703 #define CHECK_RBUFLEN(len) { CHECK_LENGTH(rblen, len); rblen -= len; } 3704 #define CHECK_ACTLEN CHECK_LENGTH(ablen, action->len) 3705 3706 av++; 3707 3708 /* [rule N] -- Rule number optional */ 3709 if (av[0] && isdigit(**av)) { 3710 rule->rulenum = atoi(*av); 3711 av++; 3712 } 3713 3714 /* [set N] -- set number (0..RESVD_SET), optional */ 3715 if (av[0] && av[1] && _substrcmp(*av, "set") == 0) { 3716 int set = strtoul(av[1], NULL, 10); 3717 if (set < 0 || set > RESVD_SET) 3718 errx(EX_DATAERR, "illegal set %s", av[1]); 3719 rule->set = set; 3720 tstate->set = set; 3721 av += 2; 3722 } 3723 3724 /* [prob D] -- match probability, optional */ 3725 if (av[0] && av[1] && _substrcmp(*av, "prob") == 0) { 3726 match_prob = strtod(av[1], NULL); 3727 3728 if (match_prob <= 0 || match_prob > 1) 3729 errx(EX_DATAERR, "illegal match prob. %s", av[1]); 3730 av += 2; 3731 } 3732 3733 /* action -- mandatory */ 3734 NEED1("missing action"); 3735 i = match_token(rule_actions, *av); 3736 av++; 3737 action->len = 1; /* default */ 3738 CHECK_ACTLEN; 3739 switch(i) { 3740 case TOK_CHECKSTATE: 3741 have_state = action; 3742 action->opcode = O_CHECK_STATE; 3743 if (*av == NULL || 3744 match_token(rule_options, *av) == TOK_COMMENT) { 3745 action->arg1 = pack_object(tstate, 3746 default_state_name, IPFW_TLV_STATE_NAME); 3747 break; 3748 } 3749 if (*av[0] == ':') { 3750 if (strcmp(*av + 1, "any") == 0) 3751 action->arg1 = 0; 3752 else if (state_check_name(*av + 1) == 0) 3753 action->arg1 = pack_object(tstate, *av + 1, 3754 IPFW_TLV_STATE_NAME); 3755 else 3756 errx(EX_DATAERR, "Invalid state name %s", 3757 *av); 3758 av++; 3759 break; 3760 } 3761 errx(EX_DATAERR, "Invalid state name %s", *av); 3762 break; 3763 3764 case TOK_ABORT: 3765 action->opcode = O_REJECT; 3766 action->arg1 = ICMP_REJECT_ABORT; 3767 break; 3768 3769 case TOK_ABORT6: 3770 action->opcode = O_UNREACH6; 3771 action->arg1 = ICMP6_UNREACH_ABORT; 3772 break; 3773 3774 case TOK_ACCEPT: 3775 action->opcode = O_ACCEPT; 3776 break; 3777 3778 case TOK_DENY: 3779 action->opcode = O_DENY; 3780 action->arg1 = 0; 3781 break; 3782 3783 case TOK_REJECT: 3784 action->opcode = O_REJECT; 3785 action->arg1 = ICMP_UNREACH_HOST; 3786 break; 3787 3788 case TOK_RESET: 3789 action->opcode = O_REJECT; 3790 action->arg1 = ICMP_REJECT_RST; 3791 break; 3792 3793 case TOK_RESET6: 3794 action->opcode = O_UNREACH6; 3795 action->arg1 = ICMP6_UNREACH_RST; 3796 break; 3797 3798 case TOK_UNREACH: 3799 action->opcode = O_REJECT; 3800 NEED1("missing reject code"); 3801 fill_reject_code(&action->arg1, *av); 3802 av++; 3803 break; 3804 3805 case TOK_UNREACH6: 3806 action->opcode = O_UNREACH6; 3807 NEED1("missing unreach code"); 3808 fill_unreach6_code(&action->arg1, *av); 3809 av++; 3810 break; 3811 3812 case TOK_COUNT: 3813 action->opcode = O_COUNT; 3814 break; 3815 3816 case TOK_NAT: 3817 action->opcode = O_NAT; 3818 action->len = F_INSN_SIZE(ipfw_insn_nat); 3819 CHECK_ACTLEN; 3820 if (*av != NULL && _substrcmp(*av, "global") == 0) { 3821 action->arg1 = IP_FW_NAT44_GLOBAL; 3822 av++; 3823 break; 3824 } else 3825 goto chkarg; 3826 case TOK_QUEUE: 3827 action->opcode = O_QUEUE; 3828 goto chkarg; 3829 case TOK_PIPE: 3830 action->opcode = O_PIPE; 3831 goto chkarg; 3832 case TOK_SKIPTO: 3833 action->opcode = O_SKIPTO; 3834 goto chkarg; 3835 case TOK_NETGRAPH: 3836 action->opcode = O_NETGRAPH; 3837 goto chkarg; 3838 case TOK_NGTEE: 3839 action->opcode = O_NGTEE; 3840 goto chkarg; 3841 case TOK_DIVERT: 3842 action->opcode = O_DIVERT; 3843 goto chkarg; 3844 case TOK_TEE: 3845 action->opcode = O_TEE; 3846 goto chkarg; 3847 case TOK_CALL: 3848 action->opcode = O_CALLRETURN; 3849 chkarg: 3850 if (!av[0]) 3851 errx(EX_USAGE, "missing argument for %s", *(av - 1)); 3852 if (isdigit(**av)) { 3853 action->arg1 = strtoul(*av, NULL, 10); 3854 if (action->arg1 <= 0 || action->arg1 >= IP_FW_TABLEARG) 3855 errx(EX_DATAERR, "illegal argument for %s", 3856 *(av - 1)); 3857 } else if (_substrcmp(*av, "tablearg") == 0) { 3858 action->arg1 = IP_FW_TARG; 3859 } else if (i == TOK_DIVERT || i == TOK_TEE) { 3860 struct servent *s; 3861 setservent(1); 3862 s = getservbyname(av[0], "divert"); 3863 if (s != NULL) 3864 action->arg1 = ntohs(s->s_port); 3865 else 3866 errx(EX_DATAERR, "illegal divert/tee port"); 3867 } else 3868 errx(EX_DATAERR, "illegal argument for %s", *(av - 1)); 3869 av++; 3870 break; 3871 3872 case TOK_FORWARD: { 3873 /* 3874 * Locate the address-port separator (':' or ','). 3875 * Could be one of the following: 3876 * hostname:port 3877 * IPv4 a.b.c.d,port 3878 * IPv4 a.b.c.d:port 3879 * IPv6 w:x:y::z,port 3880 * The ':' can only be used with hostname and IPv4 address. 3881 * XXX-BZ Should we also support [w:x:y::z]:port? 3882 */ 3883 struct sockaddr_storage result; 3884 struct addrinfo *res; 3885 char *s, *end; 3886 int family; 3887 u_short port_number; 3888 3889 NEED1("missing forward address[:port]"); 3890 3891 /* 3892 * locate the address-port separator (':' or ',') 3893 */ 3894 s = strchr(*av, ','); 3895 if (s == NULL) { 3896 /* Distinguish between IPv4:port and IPv6 cases. */ 3897 s = strchr(*av, ':'); 3898 if (s && strchr(s+1, ':')) 3899 s = NULL; /* no port */ 3900 } 3901 3902 port_number = 0; 3903 if (s != NULL) { 3904 /* Terminate host portion and set s to start of port. */ 3905 *(s++) = '\0'; 3906 i = strtoport(s, &end, 0 /* base */, 0 /* proto */); 3907 if (s == end) 3908 errx(EX_DATAERR, 3909 "illegal forwarding port ``%s''", s); 3910 port_number = (u_short)i; 3911 } 3912 3913 if (_substrcmp(*av, "tablearg") == 0) { 3914 family = PF_INET; 3915 ((struct sockaddr_in*)&result)->sin_addr.s_addr = 3916 INADDR_ANY; 3917 } else { 3918 /* 3919 * Resolve the host name or address to a family and a 3920 * network representation of the address. 3921 */ 3922 if (getaddrinfo(*av, NULL, NULL, &res)) 3923 errx(EX_DATAERR, NULL); 3924 /* Just use the first host in the answer. */ 3925 family = res->ai_family; 3926 memcpy(&result, res->ai_addr, res->ai_addrlen); 3927 freeaddrinfo(res); 3928 } 3929 3930 if (family == PF_INET) { 3931 ipfw_insn_sa *p = (ipfw_insn_sa *)action; 3932 3933 action->opcode = O_FORWARD_IP; 3934 action->len = F_INSN_SIZE(ipfw_insn_sa); 3935 CHECK_ACTLEN; 3936 3937 /* 3938 * In the kernel we assume AF_INET and use only 3939 * sin_port and sin_addr. Remember to set sin_len as 3940 * the routing code seems to use it too. 3941 */ 3942 p->sa.sin_len = sizeof(struct sockaddr_in); 3943 p->sa.sin_family = AF_INET; 3944 p->sa.sin_port = port_number; 3945 p->sa.sin_addr.s_addr = 3946 ((struct sockaddr_in *)&result)->sin_addr.s_addr; 3947 } else if (family == PF_INET6) { 3948 ipfw_insn_sa6 *p = (ipfw_insn_sa6 *)action; 3949 3950 action->opcode = O_FORWARD_IP6; 3951 action->len = F_INSN_SIZE(ipfw_insn_sa6); 3952 CHECK_ACTLEN; 3953 3954 p->sa.sin6_len = sizeof(struct sockaddr_in6); 3955 p->sa.sin6_family = AF_INET6; 3956 p->sa.sin6_port = port_number; 3957 p->sa.sin6_flowinfo = 0; 3958 p->sa.sin6_scope_id = 3959 ((struct sockaddr_in6 *)&result)->sin6_scope_id; 3960 bcopy(&((struct sockaddr_in6*)&result)->sin6_addr, 3961 &p->sa.sin6_addr, sizeof(p->sa.sin6_addr)); 3962 } else { 3963 errx(EX_DATAERR, "Invalid address family in forward action"); 3964 } 3965 av++; 3966 break; 3967 } 3968 case TOK_COMMENT: 3969 /* pretend it is a 'count' rule followed by the comment */ 3970 action->opcode = O_COUNT; 3971 av--; /* go back... */ 3972 break; 3973 3974 case TOK_SETFIB: 3975 { 3976 int numfibs; 3977 size_t intsize = sizeof(int); 3978 3979 action->opcode = O_SETFIB; 3980 NEED1("missing fib number"); 3981 if (_substrcmp(*av, "tablearg") == 0) { 3982 action->arg1 = IP_FW_TARG; 3983 } else { 3984 action->arg1 = strtoul(*av, NULL, 10); 3985 if (sysctlbyname("net.fibs", &numfibs, &intsize, 3986 NULL, 0) == -1) 3987 errx(EX_DATAERR, "fibs not suported.\n"); 3988 if (action->arg1 >= numfibs) /* Temporary */ 3989 errx(EX_DATAERR, "fib too large.\n"); 3990 /* Add high-order bit to fib to make room for tablearg*/ 3991 action->arg1 |= 0x8000; 3992 } 3993 av++; 3994 break; 3995 } 3996 3997 case TOK_SETDSCP: 3998 { 3999 int code; 4000 4001 action->opcode = O_SETDSCP; 4002 NEED1("missing DSCP code"); 4003 if (_substrcmp(*av, "tablearg") == 0) { 4004 action->arg1 = IP_FW_TARG; 4005 } else { 4006 if (isalpha(*av[0])) { 4007 if ((code = match_token(f_ipdscp, *av)) == -1) 4008 errx(EX_DATAERR, "Unknown DSCP code"); 4009 action->arg1 = code; 4010 } else 4011 action->arg1 = strtoul(*av, NULL, 10); 4012 /* 4013 * Add high-order bit to DSCP to make room 4014 * for tablearg 4015 */ 4016 action->arg1 |= 0x8000; 4017 } 4018 av++; 4019 break; 4020 } 4021 4022 case TOK_REASS: 4023 action->opcode = O_REASS; 4024 break; 4025 4026 case TOK_RETURN: 4027 fill_cmd(action, O_CALLRETURN, F_NOT, 0); 4028 break; 4029 4030 case TOK_TCPSETMSS: { 4031 u_long mss; 4032 uint16_t idx; 4033 4034 idx = pack_object(tstate, "tcp-setmss", IPFW_TLV_EACTION); 4035 if (idx == 0) 4036 errx(EX_DATAERR, "pack_object failed"); 4037 fill_cmd(action, O_EXTERNAL_ACTION, 0, idx); 4038 NEED1("Missing MSS value"); 4039 action = next_cmd(action, &ablen); 4040 action->len = 1; 4041 CHECK_ACTLEN; 4042 mss = strtoul(*av, NULL, 10); 4043 if (mss == 0 || mss > UINT16_MAX) 4044 errx(EX_USAGE, "invalid MSS value %s", *av); 4045 fill_cmd(action, O_EXTERNAL_DATA, 0, (uint16_t)mss); 4046 av++; 4047 break; 4048 } 4049 4050 default: 4051 av--; 4052 if (match_token(rule_eactions, *av) == -1) 4053 errx(EX_DATAERR, "invalid action %s\n", *av); 4054 /* 4055 * External actions support. 4056 * XXX: we support only syntax with instance name. 4057 * For known external actions (from rule_eactions list) 4058 * we can handle syntax directly. But with `eaction' 4059 * keyword we can use only `eaction <name> <instance>' 4060 * syntax. 4061 */ 4062 case TOK_EACTION: { 4063 uint16_t idx; 4064 4065 NEED1("Missing eaction name"); 4066 if (eaction_check_name(*av) != 0) 4067 errx(EX_DATAERR, "Invalid eaction name %s", *av); 4068 idx = pack_object(tstate, *av, IPFW_TLV_EACTION); 4069 if (idx == 0) 4070 errx(EX_DATAERR, "pack_object failed"); 4071 fill_cmd(action, O_EXTERNAL_ACTION, 0, idx); 4072 av++; 4073 NEED1("Missing eaction instance name"); 4074 action = next_cmd(action, &ablen); 4075 action->len = 1; 4076 CHECK_ACTLEN; 4077 if (eaction_check_name(*av) != 0) 4078 errx(EX_DATAERR, "Invalid eaction instance name %s", 4079 *av); 4080 /* 4081 * External action instance object has TLV type depended 4082 * from the external action name object index. Since we 4083 * currently don't know this index, use zero as TLV type. 4084 */ 4085 idx = pack_object(tstate, *av, 0); 4086 if (idx == 0) 4087 errx(EX_DATAERR, "pack_object failed"); 4088 fill_cmd(action, O_EXTERNAL_INSTANCE, 0, idx); 4089 av++; 4090 } 4091 } 4092 action = next_cmd(action, &ablen); 4093 4094 /* 4095 * [altq queuename] -- altq tag, optional 4096 * [log [logamount N]] -- log, optional 4097 * 4098 * If they exist, it go first in the cmdbuf, but then it is 4099 * skipped in the copy section to the end of the buffer. 4100 */ 4101 while (av[0] != NULL && (i = match_token(rule_action_params, *av)) != -1) { 4102 av++; 4103 switch (i) { 4104 case TOK_LOG: 4105 { 4106 ipfw_insn_log *c = (ipfw_insn_log *)cmd; 4107 int l; 4108 4109 if (have_log) 4110 errx(EX_DATAERR, 4111 "log cannot be specified more than once"); 4112 have_log = (ipfw_insn *)c; 4113 cmd->len = F_INSN_SIZE(ipfw_insn_log); 4114 CHECK_CMDLEN; 4115 cmd->opcode = O_LOG; 4116 if (av[0] && _substrcmp(*av, "logamount") == 0) { 4117 av++; 4118 NEED1("logamount requires argument"); 4119 l = atoi(*av); 4120 if (l < 0) 4121 errx(EX_DATAERR, 4122 "logamount must be positive"); 4123 c->max_log = l; 4124 av++; 4125 } else { 4126 len = sizeof(c->max_log); 4127 if (sysctlbyname("net.inet.ip.fw.verbose_limit", 4128 &c->max_log, &len, NULL, 0) == -1) { 4129 if (co.test_only) { 4130 c->max_log = 0; 4131 break; 4132 } 4133 errx(1, "sysctlbyname(\"%s\")", 4134 "net.inet.ip.fw.verbose_limit"); 4135 } 4136 } 4137 } 4138 break; 4139 4140 #ifndef NO_ALTQ 4141 case TOK_ALTQ: 4142 { 4143 ipfw_insn_altq *a = (ipfw_insn_altq *)cmd; 4144 4145 NEED1("missing altq queue name"); 4146 if (have_altq) 4147 errx(EX_DATAERR, 4148 "altq cannot be specified more than once"); 4149 have_altq = (ipfw_insn *)a; 4150 cmd->len = F_INSN_SIZE(ipfw_insn_altq); 4151 CHECK_CMDLEN; 4152 cmd->opcode = O_ALTQ; 4153 a->qid = altq_name_to_qid(*av); 4154 av++; 4155 } 4156 break; 4157 #endif 4158 4159 case TOK_TAG: 4160 case TOK_UNTAG: { 4161 uint16_t tag; 4162 4163 if (have_tag) 4164 errx(EX_USAGE, "tag and untag cannot be " 4165 "specified more than once"); 4166 GET_UINT_ARG(tag, IPFW_ARG_MIN, IPFW_ARG_MAX, i, 4167 rule_action_params); 4168 have_tag = cmd; 4169 fill_cmd(cmd, O_TAG, (i == TOK_TAG) ? 0: F_NOT, tag); 4170 av++; 4171 break; 4172 } 4173 4174 default: 4175 abort(); 4176 } 4177 cmd = next_cmd(cmd, &cblen); 4178 } 4179 4180 if (have_state) { /* must be a check-state, we are done */ 4181 if (*av != NULL && 4182 match_token(rule_options, *av) == TOK_COMMENT) { 4183 /* check-state has a comment */ 4184 av++; 4185 fill_comment(cmd, av, cblen); 4186 cmd = next_cmd(cmd, &cblen); 4187 av[0] = NULL; 4188 } 4189 goto done; 4190 } 4191 4192 #define OR_START(target) \ 4193 if (av[0] && (*av[0] == '(' || *av[0] == '{')) { \ 4194 if (open_par) \ 4195 errx(EX_USAGE, "nested \"(\" not allowed\n"); \ 4196 prev = NULL; \ 4197 open_par = 1; \ 4198 if ( (av[0])[1] == '\0') { \ 4199 av++; \ 4200 } else \ 4201 (*av)++; \ 4202 } \ 4203 target: \ 4204 4205 4206 #define CLOSE_PAR \ 4207 if (open_par) { \ 4208 if (av[0] && ( \ 4209 strcmp(*av, ")") == 0 || \ 4210 strcmp(*av, "}") == 0)) { \ 4211 prev = NULL; \ 4212 open_par = 0; \ 4213 av++; \ 4214 } else \ 4215 errx(EX_USAGE, "missing \")\"\n"); \ 4216 } 4217 4218 #define NOT_BLOCK \ 4219 if (av[0] && _substrcmp(*av, "not") == 0) { \ 4220 if (cmd->len & F_NOT) \ 4221 errx(EX_USAGE, "double \"not\" not allowed\n"); \ 4222 cmd->len |= F_NOT; \ 4223 av++; \ 4224 } 4225 4226 #define OR_BLOCK(target) \ 4227 if (av[0] && _substrcmp(*av, "or") == 0) { \ 4228 if (prev == NULL || open_par == 0) \ 4229 errx(EX_DATAERR, "invalid OR block"); \ 4230 prev->len |= F_OR; \ 4231 av++; \ 4232 goto target; \ 4233 } \ 4234 CLOSE_PAR; 4235 4236 first_cmd = cmd; 4237 4238 #if 0 4239 /* 4240 * MAC addresses, optional. 4241 * If we have this, we skip the part "proto from src to dst" 4242 * and jump straight to the option parsing. 4243 */ 4244 NOT_BLOCK; 4245 NEED1("missing protocol"); 4246 if (_substrcmp(*av, "MAC") == 0 || 4247 _substrcmp(*av, "mac") == 0) { 4248 av++; /* the "MAC" keyword */ 4249 add_mac(cmd, av); /* exits in case of errors */ 4250 cmd = next_cmd(cmd); 4251 av += 2; /* dst-mac and src-mac */ 4252 NOT_BLOCK; 4253 NEED1("missing mac type"); 4254 if (add_mactype(cmd, av[0])) 4255 cmd = next_cmd(cmd); 4256 av++; /* any or mac-type */ 4257 goto read_options; 4258 } 4259 #endif 4260 4261 /* 4262 * protocol, mandatory 4263 */ 4264 OR_START(get_proto); 4265 NOT_BLOCK; 4266 NEED1("missing protocol"); 4267 if (add_proto_compat(cmd, *av, &proto)) { 4268 av++; 4269 if (F_LEN(cmd) != 0) { 4270 prev = cmd; 4271 cmd = next_cmd(cmd, &cblen); 4272 } 4273 } else if (first_cmd != cmd) { 4274 errx(EX_DATAERR, "invalid protocol ``%s''", *av); 4275 } else 4276 goto read_options; 4277 OR_BLOCK(get_proto); 4278 4279 /* 4280 * "from", mandatory 4281 */ 4282 if ((av[0] == NULL) || _substrcmp(*av, "from") != 0) 4283 errx(EX_USAGE, "missing ``from''"); 4284 av++; 4285 4286 /* 4287 * source IP, mandatory 4288 */ 4289 OR_START(source_ip); 4290 NOT_BLOCK; /* optional "not" */ 4291 NEED1("missing source address"); 4292 if (add_src(cmd, *av, proto, cblen, tstate)) { 4293 av++; 4294 if (F_LEN(cmd) != 0) { /* ! any */ 4295 prev = cmd; 4296 cmd = next_cmd(cmd, &cblen); 4297 } 4298 } else 4299 errx(EX_USAGE, "bad source address %s", *av); 4300 OR_BLOCK(source_ip); 4301 4302 /* 4303 * source ports, optional 4304 */ 4305 NOT_BLOCK; /* optional "not" */ 4306 if ( av[0] != NULL ) { 4307 if (_substrcmp(*av, "any") == 0 || 4308 add_ports(cmd, *av, proto, O_IP_SRCPORT, cblen)) { 4309 av++; 4310 if (F_LEN(cmd) != 0) 4311 cmd = next_cmd(cmd, &cblen); 4312 } 4313 } 4314 4315 /* 4316 * "to", mandatory 4317 */ 4318 if ( (av[0] == NULL) || _substrcmp(*av, "to") != 0 ) 4319 errx(EX_USAGE, "missing ``to''"); 4320 av++; 4321 4322 /* 4323 * destination, mandatory 4324 */ 4325 OR_START(dest_ip); 4326 NOT_BLOCK; /* optional "not" */ 4327 NEED1("missing dst address"); 4328 if (add_dst(cmd, *av, proto, cblen, tstate)) { 4329 av++; 4330 if (F_LEN(cmd) != 0) { /* ! any */ 4331 prev = cmd; 4332 cmd = next_cmd(cmd, &cblen); 4333 } 4334 } else 4335 errx( EX_USAGE, "bad destination address %s", *av); 4336 OR_BLOCK(dest_ip); 4337 4338 /* 4339 * dest. ports, optional 4340 */ 4341 NOT_BLOCK; /* optional "not" */ 4342 if (av[0]) { 4343 if (_substrcmp(*av, "any") == 0 || 4344 add_ports(cmd, *av, proto, O_IP_DSTPORT, cblen)) { 4345 av++; 4346 if (F_LEN(cmd) != 0) 4347 cmd = next_cmd(cmd, &cblen); 4348 } 4349 } 4350 4351 read_options: 4352 if (av[0] && first_cmd == cmd) { 4353 /* 4354 * nothing specified so far, store in the rule to ease 4355 * printout later. 4356 */ 4357 rule->flags |= IPFW_RULE_NOOPT; 4358 } 4359 prev = NULL; 4360 while ( av[0] != NULL ) { 4361 char *s; 4362 ipfw_insn_u32 *cmd32; /* alias for cmd */ 4363 4364 s = *av; 4365 cmd32 = (ipfw_insn_u32 *)cmd; 4366 4367 if (*s == '!') { /* alternate syntax for NOT */ 4368 if (cmd->len & F_NOT) 4369 errx(EX_USAGE, "double \"not\" not allowed\n"); 4370 cmd->len = F_NOT; 4371 s++; 4372 } 4373 i = match_token(rule_options, s); 4374 av++; 4375 switch(i) { 4376 case TOK_NOT: 4377 if (cmd->len & F_NOT) 4378 errx(EX_USAGE, "double \"not\" not allowed\n"); 4379 cmd->len = F_NOT; 4380 break; 4381 4382 case TOK_OR: 4383 if (open_par == 0 || prev == NULL) 4384 errx(EX_USAGE, "invalid \"or\" block\n"); 4385 prev->len |= F_OR; 4386 break; 4387 4388 case TOK_STARTBRACE: 4389 if (open_par) 4390 errx(EX_USAGE, "+nested \"(\" not allowed\n"); 4391 open_par = 1; 4392 break; 4393 4394 case TOK_ENDBRACE: 4395 if (!open_par) 4396 errx(EX_USAGE, "+missing \")\"\n"); 4397 open_par = 0; 4398 prev = NULL; 4399 break; 4400 4401 case TOK_IN: 4402 fill_cmd(cmd, O_IN, 0, 0); 4403 break; 4404 4405 case TOK_OUT: 4406 cmd->len ^= F_NOT; /* toggle F_NOT */ 4407 fill_cmd(cmd, O_IN, 0, 0); 4408 break; 4409 4410 case TOK_DIVERTED: 4411 fill_cmd(cmd, O_DIVERTED, 0, 3); 4412 break; 4413 4414 case TOK_DIVERTEDLOOPBACK: 4415 fill_cmd(cmd, O_DIVERTED, 0, 1); 4416 break; 4417 4418 case TOK_DIVERTEDOUTPUT: 4419 fill_cmd(cmd, O_DIVERTED, 0, 2); 4420 break; 4421 4422 case TOK_FRAG: 4423 fill_cmd(cmd, O_FRAG, 0, 0); 4424 break; 4425 4426 case TOK_LAYER2: 4427 fill_cmd(cmd, O_LAYER2, 0, 0); 4428 break; 4429 4430 case TOK_XMIT: 4431 case TOK_RECV: 4432 case TOK_VIA: 4433 NEED1("recv, xmit, via require interface name" 4434 " or address"); 4435 fill_iface((ipfw_insn_if *)cmd, av[0], cblen, tstate); 4436 av++; 4437 if (F_LEN(cmd) == 0) /* not a valid address */ 4438 break; 4439 if (i == TOK_XMIT) 4440 cmd->opcode = O_XMIT; 4441 else if (i == TOK_RECV) 4442 cmd->opcode = O_RECV; 4443 else if (i == TOK_VIA) 4444 cmd->opcode = O_VIA; 4445 break; 4446 4447 case TOK_ICMPTYPES: 4448 NEED1("icmptypes requires list of types"); 4449 fill_icmptypes((ipfw_insn_u32 *)cmd, *av); 4450 av++; 4451 break; 4452 4453 case TOK_ICMP6TYPES: 4454 NEED1("icmptypes requires list of types"); 4455 fill_icmp6types((ipfw_insn_icmp6 *)cmd, *av, cblen); 4456 av++; 4457 break; 4458 4459 case TOK_IPTTL: 4460 NEED1("ipttl requires TTL"); 4461 if (strpbrk(*av, "-,")) { 4462 if (!add_ports(cmd, *av, 0, O_IPTTL, cblen)) 4463 errx(EX_DATAERR, "invalid ipttl %s", *av); 4464 } else 4465 fill_cmd(cmd, O_IPTTL, 0, strtoul(*av, NULL, 0)); 4466 av++; 4467 break; 4468 4469 case TOK_IPID: 4470 NEED1("ipid requires id"); 4471 if (strpbrk(*av, "-,")) { 4472 if (!add_ports(cmd, *av, 0, O_IPID, cblen)) 4473 errx(EX_DATAERR, "invalid ipid %s", *av); 4474 } else 4475 fill_cmd(cmd, O_IPID, 0, strtoul(*av, NULL, 0)); 4476 av++; 4477 break; 4478 4479 case TOK_IPLEN: 4480 NEED1("iplen requires length"); 4481 if (strpbrk(*av, "-,")) { 4482 if (!add_ports(cmd, *av, 0, O_IPLEN, cblen)) 4483 errx(EX_DATAERR, "invalid ip len %s", *av); 4484 } else 4485 fill_cmd(cmd, O_IPLEN, 0, strtoul(*av, NULL, 0)); 4486 av++; 4487 break; 4488 4489 case TOK_IPVER: 4490 NEED1("ipver requires version"); 4491 fill_cmd(cmd, O_IPVER, 0, strtoul(*av, NULL, 0)); 4492 av++; 4493 break; 4494 4495 case TOK_IPPRECEDENCE: 4496 NEED1("ipprecedence requires value"); 4497 fill_cmd(cmd, O_IPPRECEDENCE, 0, 4498 (strtoul(*av, NULL, 0) & 7) << 5); 4499 av++; 4500 break; 4501 4502 case TOK_DSCP: 4503 NEED1("missing DSCP code"); 4504 fill_dscp(cmd, *av, cblen); 4505 av++; 4506 break; 4507 4508 case TOK_IPOPTS: 4509 NEED1("missing argument for ipoptions"); 4510 fill_flags_cmd(cmd, O_IPOPT, f_ipopts, *av); 4511 av++; 4512 break; 4513 4514 case TOK_IPTOS: 4515 NEED1("missing argument for iptos"); 4516 fill_flags_cmd(cmd, O_IPTOS, f_iptos, *av); 4517 av++; 4518 break; 4519 4520 case TOK_UID: 4521 NEED1("uid requires argument"); 4522 { 4523 char *end; 4524 uid_t uid; 4525 struct passwd *pwd; 4526 4527 cmd->opcode = O_UID; 4528 uid = strtoul(*av, &end, 0); 4529 pwd = (*end == '\0') ? getpwuid(uid) : getpwnam(*av); 4530 if (pwd == NULL) 4531 errx(EX_DATAERR, "uid \"%s\" nonexistent", *av); 4532 cmd32->d[0] = pwd->pw_uid; 4533 cmd->len |= F_INSN_SIZE(ipfw_insn_u32); 4534 av++; 4535 } 4536 break; 4537 4538 case TOK_GID: 4539 NEED1("gid requires argument"); 4540 { 4541 char *end; 4542 gid_t gid; 4543 struct group *grp; 4544 4545 cmd->opcode = O_GID; 4546 gid = strtoul(*av, &end, 0); 4547 grp = (*end == '\0') ? getgrgid(gid) : getgrnam(*av); 4548 if (grp == NULL) 4549 errx(EX_DATAERR, "gid \"%s\" nonexistent", *av); 4550 cmd32->d[0] = grp->gr_gid; 4551 cmd->len |= F_INSN_SIZE(ipfw_insn_u32); 4552 av++; 4553 } 4554 break; 4555 4556 case TOK_JAIL: 4557 NEED1("jail requires argument"); 4558 { 4559 char *end; 4560 int jid; 4561 4562 cmd->opcode = O_JAIL; 4563 jid = (int)strtol(*av, &end, 0); 4564 if (jid < 0 || *end != '\0') 4565 errx(EX_DATAERR, "jail requires prison ID"); 4566 cmd32->d[0] = (uint32_t)jid; 4567 cmd->len |= F_INSN_SIZE(ipfw_insn_u32); 4568 av++; 4569 } 4570 break; 4571 4572 case TOK_ESTAB: 4573 fill_cmd(cmd, O_ESTAB, 0, 0); 4574 break; 4575 4576 case TOK_SETUP: 4577 fill_cmd(cmd, O_TCPFLAGS, 0, 4578 (TH_SYN) | ( (TH_ACK) & 0xff) <<8 ); 4579 break; 4580 4581 case TOK_TCPDATALEN: 4582 NEED1("tcpdatalen requires length"); 4583 if (strpbrk(*av, "-,")) { 4584 if (!add_ports(cmd, *av, 0, O_TCPDATALEN, cblen)) 4585 errx(EX_DATAERR, "invalid tcpdata len %s", *av); 4586 } else 4587 fill_cmd(cmd, O_TCPDATALEN, 0, 4588 strtoul(*av, NULL, 0)); 4589 av++; 4590 break; 4591 4592 case TOK_TCPOPTS: 4593 NEED1("missing argument for tcpoptions"); 4594 fill_flags_cmd(cmd, O_TCPOPTS, f_tcpopts, *av); 4595 av++; 4596 break; 4597 4598 case TOK_TCPSEQ: 4599 case TOK_TCPACK: 4600 NEED1("tcpseq/tcpack requires argument"); 4601 cmd->len = F_INSN_SIZE(ipfw_insn_u32); 4602 cmd->opcode = (i == TOK_TCPSEQ) ? O_TCPSEQ : O_TCPACK; 4603 cmd32->d[0] = htonl(strtoul(*av, NULL, 0)); 4604 av++; 4605 break; 4606 4607 case TOK_TCPWIN: 4608 NEED1("tcpwin requires length"); 4609 if (strpbrk(*av, "-,")) { 4610 if (!add_ports(cmd, *av, 0, O_TCPWIN, cblen)) 4611 errx(EX_DATAERR, "invalid tcpwin len %s", *av); 4612 } else 4613 fill_cmd(cmd, O_TCPWIN, 0, 4614 strtoul(*av, NULL, 0)); 4615 av++; 4616 break; 4617 4618 case TOK_TCPFLAGS: 4619 NEED1("missing argument for tcpflags"); 4620 cmd->opcode = O_TCPFLAGS; 4621 fill_flags_cmd(cmd, O_TCPFLAGS, f_tcpflags, *av); 4622 av++; 4623 break; 4624 4625 case TOK_KEEPSTATE: { 4626 uint16_t uidx; 4627 4628 if (open_par) 4629 errx(EX_USAGE, "keep-state cannot be part " 4630 "of an or block"); 4631 if (have_state) 4632 errx(EX_USAGE, "only one of keep-state " 4633 "and limit is allowed"); 4634 if (*av != NULL && *av[0] == ':') { 4635 if (state_check_name(*av + 1) != 0) 4636 errx(EX_DATAERR, 4637 "Invalid state name %s", *av); 4638 uidx = pack_object(tstate, *av + 1, 4639 IPFW_TLV_STATE_NAME); 4640 av++; 4641 } else 4642 uidx = pack_object(tstate, default_state_name, 4643 IPFW_TLV_STATE_NAME); 4644 have_state = cmd; 4645 fill_cmd(cmd, O_KEEP_STATE, 0, uidx); 4646 break; 4647 } 4648 4649 case TOK_LIMIT: { 4650 ipfw_insn_limit *c = (ipfw_insn_limit *)cmd; 4651 int val; 4652 4653 if (open_par) 4654 errx(EX_USAGE, 4655 "limit cannot be part of an or block"); 4656 if (have_state) 4657 errx(EX_USAGE, "only one of keep-state and " 4658 "limit is allowed"); 4659 have_state = cmd; 4660 4661 cmd->len = F_INSN_SIZE(ipfw_insn_limit); 4662 CHECK_CMDLEN; 4663 cmd->opcode = O_LIMIT; 4664 c->limit_mask = c->conn_limit = 0; 4665 4666 while ( av[0] != NULL ) { 4667 if ((val = match_token(limit_masks, *av)) <= 0) 4668 break; 4669 c->limit_mask |= val; 4670 av++; 4671 } 4672 4673 if (c->limit_mask == 0) 4674 errx(EX_USAGE, "limit: missing limit mask"); 4675 4676 GET_UINT_ARG(c->conn_limit, IPFW_ARG_MIN, IPFW_ARG_MAX, 4677 TOK_LIMIT, rule_options); 4678 av++; 4679 4680 if (*av != NULL && *av[0] == ':') { 4681 if (state_check_name(*av + 1) != 0) 4682 errx(EX_DATAERR, 4683 "Invalid state name %s", *av); 4684 cmd->arg1 = pack_object(tstate, *av + 1, 4685 IPFW_TLV_STATE_NAME); 4686 av++; 4687 } else 4688 cmd->arg1 = pack_object(tstate, 4689 default_state_name, IPFW_TLV_STATE_NAME); 4690 break; 4691 } 4692 4693 case TOK_PROTO: 4694 NEED1("missing protocol"); 4695 if (add_proto(cmd, *av, &proto)) { 4696 av++; 4697 } else 4698 errx(EX_DATAERR, "invalid protocol ``%s''", 4699 *av); 4700 break; 4701 4702 case TOK_SRCIP: 4703 NEED1("missing source IP"); 4704 if (add_srcip(cmd, *av, cblen, tstate)) { 4705 av++; 4706 } 4707 break; 4708 4709 case TOK_DSTIP: 4710 NEED1("missing destination IP"); 4711 if (add_dstip(cmd, *av, cblen, tstate)) { 4712 av++; 4713 } 4714 break; 4715 4716 case TOK_SRCIP6: 4717 NEED1("missing source IP6"); 4718 if (add_srcip6(cmd, *av, cblen, tstate)) { 4719 av++; 4720 } 4721 break; 4722 4723 case TOK_DSTIP6: 4724 NEED1("missing destination IP6"); 4725 if (add_dstip6(cmd, *av, cblen, tstate)) { 4726 av++; 4727 } 4728 break; 4729 4730 case TOK_SRCPORT: 4731 NEED1("missing source port"); 4732 if (_substrcmp(*av, "any") == 0 || 4733 add_ports(cmd, *av, proto, O_IP_SRCPORT, cblen)) { 4734 av++; 4735 } else 4736 errx(EX_DATAERR, "invalid source port %s", *av); 4737 break; 4738 4739 case TOK_DSTPORT: 4740 NEED1("missing destination port"); 4741 if (_substrcmp(*av, "any") == 0 || 4742 add_ports(cmd, *av, proto, O_IP_DSTPORT, cblen)) { 4743 av++; 4744 } else 4745 errx(EX_DATAERR, "invalid destination port %s", 4746 *av); 4747 break; 4748 4749 case TOK_MAC: 4750 if (add_mac(cmd, av, cblen)) 4751 av += 2; 4752 break; 4753 4754 case TOK_MACTYPE: 4755 NEED1("missing mac type"); 4756 if (!add_mactype(cmd, *av, cblen)) 4757 errx(EX_DATAERR, "invalid mac type %s", *av); 4758 av++; 4759 break; 4760 4761 case TOK_VERREVPATH: 4762 fill_cmd(cmd, O_VERREVPATH, 0, 0); 4763 break; 4764 4765 case TOK_VERSRCREACH: 4766 fill_cmd(cmd, O_VERSRCREACH, 0, 0); 4767 break; 4768 4769 case TOK_ANTISPOOF: 4770 fill_cmd(cmd, O_ANTISPOOF, 0, 0); 4771 break; 4772 4773 case TOK_IPSEC: 4774 fill_cmd(cmd, O_IPSEC, 0, 0); 4775 break; 4776 4777 case TOK_IPV6: 4778 fill_cmd(cmd, O_IP6, 0, 0); 4779 break; 4780 4781 case TOK_IPV4: 4782 fill_cmd(cmd, O_IP4, 0, 0); 4783 break; 4784 4785 case TOK_EXT6HDR: 4786 fill_ext6hdr( cmd, *av ); 4787 av++; 4788 break; 4789 4790 case TOK_FLOWID: 4791 if (proto != IPPROTO_IPV6 ) 4792 errx( EX_USAGE, "flow-id filter is active " 4793 "only for ipv6 protocol\n"); 4794 fill_flow6( (ipfw_insn_u32 *) cmd, *av, cblen); 4795 av++; 4796 break; 4797 4798 case TOK_COMMENT: 4799 fill_comment(cmd, av, cblen); 4800 av[0]=NULL; 4801 break; 4802 4803 case TOK_TAGGED: 4804 if (av[0] && strpbrk(*av, "-,")) { 4805 if (!add_ports(cmd, *av, 0, O_TAGGED, cblen)) 4806 errx(EX_DATAERR, "tagged: invalid tag" 4807 " list: %s", *av); 4808 } 4809 else { 4810 uint16_t tag; 4811 4812 GET_UINT_ARG(tag, IPFW_ARG_MIN, IPFW_ARG_MAX, 4813 TOK_TAGGED, rule_options); 4814 fill_cmd(cmd, O_TAGGED, 0, tag); 4815 } 4816 av++; 4817 break; 4818 4819 case TOK_FIB: 4820 NEED1("fib requires fib number"); 4821 fill_cmd(cmd, O_FIB, 0, strtoul(*av, NULL, 0)); 4822 av++; 4823 break; 4824 case TOK_SOCKARG: 4825 fill_cmd(cmd, O_SOCKARG, 0, 0); 4826 break; 4827 4828 case TOK_LOOKUP: { 4829 ipfw_insn_u32 *c = (ipfw_insn_u32 *)cmd; 4830 int j; 4831 4832 if (!av[0] || !av[1]) 4833 errx(EX_USAGE, "format: lookup argument tablenum"); 4834 cmd->opcode = O_IP_DST_LOOKUP; 4835 cmd->len |= F_INSN_SIZE(ipfw_insn) + 2; 4836 i = match_token(rule_options, *av); 4837 for (j = 0; lookup_key[j] >= 0 ; j++) { 4838 if (i == lookup_key[j]) 4839 break; 4840 } 4841 if (lookup_key[j] <= 0) 4842 errx(EX_USAGE, "format: cannot lookup on %s", *av); 4843 __PAST_END(c->d, 1) = j; // i converted to option 4844 av++; 4845 4846 if ((j = pack_table(tstate, *av)) == 0) 4847 errx(EX_DATAERR, "Invalid table name: %s", *av); 4848 4849 cmd->arg1 = j; 4850 av++; 4851 } 4852 break; 4853 case TOK_FLOW: 4854 NEED1("missing table name"); 4855 if (strncmp(*av, "table(", 6) != 0) 4856 errx(EX_DATAERR, 4857 "enclose table name into \"table()\""); 4858 fill_table(cmd, *av, O_IP_FLOW_LOOKUP, tstate); 4859 av++; 4860 break; 4861 4862 default: 4863 errx(EX_USAGE, "unrecognised option [%d] %s\n", i, s); 4864 } 4865 if (F_LEN(cmd) > 0) { /* prepare to advance */ 4866 prev = cmd; 4867 cmd = next_cmd(cmd, &cblen); 4868 } 4869 } 4870 4871 done: 4872 /* 4873 * Now copy stuff into the rule. 4874 * If we have a keep-state option, the first instruction 4875 * must be a PROBE_STATE (which is generated here). 4876 * If we have a LOG option, it was stored as the first command, 4877 * and now must be moved to the top of the action part. 4878 */ 4879 dst = (ipfw_insn *)rule->cmd; 4880 4881 /* 4882 * First thing to write into the command stream is the match probability. 4883 */ 4884 if (match_prob != 1) { /* 1 means always match */ 4885 dst->opcode = O_PROB; 4886 dst->len = 2; 4887 *((int32_t *)(dst+1)) = (int32_t)(match_prob * 0x7fffffff); 4888 dst += dst->len; 4889 } 4890 4891 /* 4892 * generate O_PROBE_STATE if necessary 4893 */ 4894 if (have_state && have_state->opcode != O_CHECK_STATE) { 4895 fill_cmd(dst, O_PROBE_STATE, 0, have_state->arg1); 4896 dst = next_cmd(dst, &rblen); 4897 } 4898 4899 /* copy all commands but O_LOG, O_KEEP_STATE, O_LIMIT, O_ALTQ, O_TAG */ 4900 for (src = (ipfw_insn *)cmdbuf; src != cmd; src += i) { 4901 i = F_LEN(src); 4902 CHECK_RBUFLEN(i); 4903 4904 switch (src->opcode) { 4905 case O_LOG: 4906 case O_KEEP_STATE: 4907 case O_LIMIT: 4908 case O_ALTQ: 4909 case O_TAG: 4910 break; 4911 default: 4912 bcopy(src, dst, i * sizeof(uint32_t)); 4913 dst += i; 4914 } 4915 } 4916 4917 /* 4918 * put back the have_state command as last opcode 4919 */ 4920 if (have_state && have_state->opcode != O_CHECK_STATE) { 4921 i = F_LEN(have_state); 4922 CHECK_RBUFLEN(i); 4923 bcopy(have_state, dst, i * sizeof(uint32_t)); 4924 dst += i; 4925 } 4926 /* 4927 * start action section 4928 */ 4929 rule->act_ofs = dst - rule->cmd; 4930 4931 /* put back O_LOG, O_ALTQ, O_TAG if necessary */ 4932 if (have_log) { 4933 i = F_LEN(have_log); 4934 CHECK_RBUFLEN(i); 4935 bcopy(have_log, dst, i * sizeof(uint32_t)); 4936 dst += i; 4937 } 4938 if (have_altq) { 4939 i = F_LEN(have_altq); 4940 CHECK_RBUFLEN(i); 4941 bcopy(have_altq, dst, i * sizeof(uint32_t)); 4942 dst += i; 4943 } 4944 if (have_tag) { 4945 i = F_LEN(have_tag); 4946 CHECK_RBUFLEN(i); 4947 bcopy(have_tag, dst, i * sizeof(uint32_t)); 4948 dst += i; 4949 } 4950 4951 /* 4952 * copy all other actions 4953 */ 4954 for (src = (ipfw_insn *)actbuf; src != action; src += i) { 4955 i = F_LEN(src); 4956 CHECK_RBUFLEN(i); 4957 bcopy(src, dst, i * sizeof(uint32_t)); 4958 dst += i; 4959 } 4960 4961 rule->cmd_len = (uint32_t *)dst - (uint32_t *)(rule->cmd); 4962 *rbufsize = (char *)dst - (char *)rule; 4963 } 4964 4965 static int 4966 compare_ntlv(const void *_a, const void *_b) 4967 { 4968 ipfw_obj_ntlv *a, *b; 4969 4970 a = (ipfw_obj_ntlv *)_a; 4971 b = (ipfw_obj_ntlv *)_b; 4972 4973 if (a->set < b->set) 4974 return (-1); 4975 else if (a->set > b->set) 4976 return (1); 4977 4978 if (a->idx < b->idx) 4979 return (-1); 4980 else if (a->idx > b->idx) 4981 return (1); 4982 4983 if (a->head.type < b->head.type) 4984 return (-1); 4985 else if (a->head.type > b->head.type) 4986 return (1); 4987 4988 return (0); 4989 } 4990 4991 /* 4992 * Provide kernel with sorted list of referenced objects 4993 */ 4994 static void 4995 object_sort_ctlv(ipfw_obj_ctlv *ctlv) 4996 { 4997 4998 qsort(ctlv + 1, ctlv->count, ctlv->objsize, compare_ntlv); 4999 } 5000 5001 struct object_kt { 5002 uint16_t uidx; 5003 uint16_t type; 5004 }; 5005 static int 5006 compare_object_kntlv(const void *k, const void *v) 5007 { 5008 ipfw_obj_ntlv *ntlv; 5009 struct object_kt key; 5010 5011 key = *((struct object_kt *)k); 5012 ntlv = (ipfw_obj_ntlv *)v; 5013 5014 if (key.uidx < ntlv->idx) 5015 return (-1); 5016 else if (key.uidx > ntlv->idx) 5017 return (1); 5018 5019 if (key.type < ntlv->head.type) 5020 return (-1); 5021 else if (key.type > ntlv->head.type) 5022 return (1); 5023 5024 return (0); 5025 } 5026 5027 /* 5028 * Finds object name in @ctlv by @idx and @type. 5029 * Uses the following facts: 5030 * 1) All TLVs are the same size 5031 * 2) Kernel implementation provides already sorted list. 5032 * 5033 * Returns table name or NULL. 5034 */ 5035 static char * 5036 object_search_ctlv(ipfw_obj_ctlv *ctlv, uint16_t idx, uint16_t type) 5037 { 5038 ipfw_obj_ntlv *ntlv; 5039 struct object_kt key; 5040 5041 key.uidx = idx; 5042 key.type = type; 5043 5044 ntlv = bsearch(&key, (ctlv + 1), ctlv->count, ctlv->objsize, 5045 compare_object_kntlv); 5046 5047 if (ntlv != NULL) 5048 return (ntlv->name); 5049 5050 return (NULL); 5051 } 5052 5053 static char * 5054 table_search_ctlv(ipfw_obj_ctlv *ctlv, uint16_t idx) 5055 { 5056 5057 return (object_search_ctlv(ctlv, idx, IPFW_TLV_TBL_NAME)); 5058 } 5059 5060 /* 5061 * Adds one or more rules to ipfw chain. 5062 * Data layout: 5063 * Request: 5064 * [ 5065 * ip_fw3_opheader 5066 * [ ipfw_obj_ctlv(IPFW_TLV_TBL_LIST) ipfw_obj_ntlv x N ] (optional *1) 5067 * [ ipfw_obj_ctlv(IPFW_TLV_RULE_LIST) [ ip_fw_rule ip_fw_insn ] x N ] (*2) (*3) 5068 * ] 5069 * Reply: 5070 * [ 5071 * ip_fw3_opheader 5072 * [ ipfw_obj_ctlv(IPFW_TLV_TBL_LIST) ipfw_obj_ntlv x N ] (optional) 5073 * [ ipfw_obj_ctlv(IPFW_TLV_RULE_LIST) [ ip_fw_rule ip_fw_insn ] x N ] 5074 * ] 5075 * 5076 * Rules in reply are modified to store their actual ruleset number. 5077 * 5078 * (*1) TLVs inside IPFW_TLV_TBL_LIST needs to be sorted ascending 5079 * according to their idx field and there has to be no duplicates. 5080 * (*2) Numbered rules inside IPFW_TLV_RULE_LIST needs to be sorted ascending. 5081 * (*3) Each ip_fw structure needs to be aligned to u64 boundary. 5082 */ 5083 void 5084 ipfw_add(char *av[]) 5085 { 5086 uint32_t rulebuf[1024]; 5087 int rbufsize, default_off, tlen, rlen; 5088 size_t sz; 5089 struct tidx ts; 5090 struct ip_fw_rule *rule; 5091 caddr_t tbuf; 5092 ip_fw3_opheader *op3; 5093 ipfw_obj_ctlv *ctlv, *tstate; 5094 5095 rbufsize = sizeof(rulebuf); 5096 memset(rulebuf, 0, rbufsize); 5097 memset(&ts, 0, sizeof(ts)); 5098 5099 /* Optimize case with no tables */ 5100 default_off = sizeof(ipfw_obj_ctlv) + sizeof(ip_fw3_opheader); 5101 op3 = (ip_fw3_opheader *)rulebuf; 5102 ctlv = (ipfw_obj_ctlv *)(op3 + 1); 5103 rule = (struct ip_fw_rule *)(ctlv + 1); 5104 rbufsize -= default_off; 5105 5106 compile_rule(av, (uint32_t *)rule, &rbufsize, &ts); 5107 /* Align rule size to u64 boundary */ 5108 rlen = roundup2(rbufsize, sizeof(uint64_t)); 5109 5110 tbuf = NULL; 5111 sz = 0; 5112 tstate = NULL; 5113 if (ts.count != 0) { 5114 /* Some tables. We have to alloc more data */ 5115 tlen = ts.count * sizeof(ipfw_obj_ntlv); 5116 sz = default_off + sizeof(ipfw_obj_ctlv) + tlen + rlen; 5117 5118 if ((tbuf = calloc(1, sz)) == NULL) 5119 err(EX_UNAVAILABLE, "malloc() failed for IP_FW_ADD"); 5120 op3 = (ip_fw3_opheader *)tbuf; 5121 /* Tables first */ 5122 ctlv = (ipfw_obj_ctlv *)(op3 + 1); 5123 ctlv->head.type = IPFW_TLV_TBLNAME_LIST; 5124 ctlv->head.length = sizeof(ipfw_obj_ctlv) + tlen; 5125 ctlv->count = ts.count; 5126 ctlv->objsize = sizeof(ipfw_obj_ntlv); 5127 memcpy(ctlv + 1, ts.idx, tlen); 5128 object_sort_ctlv(ctlv); 5129 tstate = ctlv; 5130 /* Rule next */ 5131 ctlv = (ipfw_obj_ctlv *)((caddr_t)ctlv + ctlv->head.length); 5132 ctlv->head.type = IPFW_TLV_RULE_LIST; 5133 ctlv->head.length = sizeof(ipfw_obj_ctlv) + rlen; 5134 ctlv->count = 1; 5135 memcpy(ctlv + 1, rule, rbufsize); 5136 } else { 5137 /* Simply add header */ 5138 sz = rlen + default_off; 5139 memset(ctlv, 0, sizeof(*ctlv)); 5140 ctlv->head.type = IPFW_TLV_RULE_LIST; 5141 ctlv->head.length = sizeof(ipfw_obj_ctlv) + rlen; 5142 ctlv->count = 1; 5143 } 5144 5145 if (do_get3(IP_FW_XADD, op3, &sz) != 0) 5146 err(EX_UNAVAILABLE, "getsockopt(%s)", "IP_FW_XADD"); 5147 5148 if (!co.do_quiet) { 5149 struct format_opts sfo; 5150 struct buf_pr bp; 5151 memset(&sfo, 0, sizeof(sfo)); 5152 sfo.tstate = tstate; 5153 sfo.set_mask = (uint32_t)(-1); 5154 bp_alloc(&bp, 4096); 5155 show_static_rule(&co, &sfo, &bp, rule, NULL); 5156 printf("%s", bp.buf); 5157 bp_free(&bp); 5158 } 5159 5160 if (tbuf != NULL) 5161 free(tbuf); 5162 5163 if (ts.idx != NULL) 5164 free(ts.idx); 5165 } 5166 5167 /* 5168 * clear the counters or the log counters. 5169 * optname has the following values: 5170 * 0 (zero both counters and logging) 5171 * 1 (zero logging only) 5172 */ 5173 void 5174 ipfw_zero(int ac, char *av[], int optname) 5175 { 5176 ipfw_range_tlv rt; 5177 char const *errstr; 5178 char const *name = optname ? "RESETLOG" : "ZERO"; 5179 uint32_t arg; 5180 int failed = EX_OK; 5181 5182 optname = optname ? IP_FW_XRESETLOG : IP_FW_XZERO; 5183 av++; ac--; 5184 5185 if (ac == 0) { 5186 /* clear all entries */ 5187 memset(&rt, 0, sizeof(rt)); 5188 rt.flags = IPFW_RCFLAG_ALL; 5189 if (do_range_cmd(optname, &rt) < 0) 5190 err(EX_UNAVAILABLE, "setsockopt(IP_FW_X%s)", name); 5191 if (!co.do_quiet) 5192 printf("%s.\n", optname == IP_FW_XZERO ? 5193 "Accounting cleared":"Logging counts reset"); 5194 5195 return; 5196 } 5197 5198 while (ac) { 5199 /* Rule number */ 5200 if (isdigit(**av)) { 5201 arg = strtonum(*av, 0, 0xffff, &errstr); 5202 if (errstr) 5203 errx(EX_DATAERR, 5204 "invalid rule number %s\n", *av); 5205 memset(&rt, 0, sizeof(rt)); 5206 rt.start_rule = arg; 5207 rt.end_rule = arg; 5208 rt.flags |= IPFW_RCFLAG_RANGE; 5209 if (co.use_set != 0) { 5210 rt.set = co.use_set - 1; 5211 rt.flags |= IPFW_RCFLAG_SET; 5212 } 5213 if (do_range_cmd(optname, &rt) != 0) { 5214 warn("rule %u: setsockopt(IP_FW_X%s)", 5215 arg, name); 5216 failed = EX_UNAVAILABLE; 5217 } else if (rt.new_set == 0) { 5218 printf("Entry %d not found\n", arg); 5219 failed = EX_UNAVAILABLE; 5220 } else if (!co.do_quiet) 5221 printf("Entry %d %s.\n", arg, 5222 optname == IP_FW_XZERO ? 5223 "cleared" : "logging count reset"); 5224 } else { 5225 errx(EX_USAGE, "invalid rule number ``%s''", *av); 5226 } 5227 av++; ac--; 5228 } 5229 if (failed != EX_OK) 5230 exit(failed); 5231 } 5232 5233 void 5234 ipfw_flush(int force) 5235 { 5236 ipfw_range_tlv rt; 5237 5238 if (!force && !co.do_quiet) { /* need to ask user */ 5239 int c; 5240 5241 printf("Are you sure? [yn] "); 5242 fflush(stdout); 5243 do { 5244 c = toupper(getc(stdin)); 5245 while (c != '\n' && getc(stdin) != '\n') 5246 if (feof(stdin)) 5247 return; /* and do not flush */ 5248 } while (c != 'Y' && c != 'N'); 5249 printf("\n"); 5250 if (c == 'N') /* user said no */ 5251 return; 5252 } 5253 if (co.do_pipe) { 5254 dummynet_flush(); 5255 return; 5256 } 5257 /* `ipfw set N flush` - is the same that `ipfw delete set N` */ 5258 memset(&rt, 0, sizeof(rt)); 5259 if (co.use_set != 0) { 5260 rt.set = co.use_set - 1; 5261 rt.flags = IPFW_RCFLAG_SET; 5262 } else 5263 rt.flags = IPFW_RCFLAG_ALL; 5264 if (do_range_cmd(IP_FW_XDEL, &rt) != 0) 5265 err(EX_UNAVAILABLE, "setsockopt(IP_FW_XDEL)"); 5266 if (!co.do_quiet) 5267 printf("Flushed all %s.\n", co.do_pipe ? "pipes" : "rules"); 5268 } 5269 5270 static struct _s_x intcmds[] = { 5271 { "talist", TOK_TALIST }, 5272 { "iflist", TOK_IFLIST }, 5273 { "olist", TOK_OLIST }, 5274 { "vlist", TOK_VLIST }, 5275 { NULL, 0 } 5276 }; 5277 5278 static struct _s_x otypes[] = { 5279 { "EACTION", IPFW_TLV_EACTION }, 5280 { "DYNSTATE", IPFW_TLV_STATE_NAME }, 5281 { NULL, 0 } 5282 }; 5283 5284 static const char* 5285 lookup_eaction_name(ipfw_obj_ntlv *ntlv, int cnt, uint16_t type) 5286 { 5287 const char *name; 5288 int i; 5289 5290 name = NULL; 5291 for (i = 0; i < cnt; i++) { 5292 if (ntlv[i].head.type != IPFW_TLV_EACTION) 5293 continue; 5294 if (IPFW_TLV_EACTION_NAME(ntlv[i].idx) != type) 5295 continue; 5296 name = ntlv[i].name; 5297 break; 5298 } 5299 return (name); 5300 } 5301 5302 static void 5303 ipfw_list_objects(int ac, char *av[]) 5304 { 5305 ipfw_obj_lheader req, *olh; 5306 ipfw_obj_ntlv *ntlv; 5307 const char *name; 5308 size_t sz; 5309 int i; 5310 5311 memset(&req, 0, sizeof(req)); 5312 sz = sizeof(req); 5313 if (do_get3(IP_FW_DUMP_SRVOBJECTS, &req.opheader, &sz) != 0) 5314 if (errno != ENOMEM) 5315 return; 5316 5317 sz = req.size; 5318 if ((olh = calloc(1, sz)) == NULL) 5319 return; 5320 5321 olh->size = sz; 5322 if (do_get3(IP_FW_DUMP_SRVOBJECTS, &olh->opheader, &sz) != 0) { 5323 free(olh); 5324 return; 5325 } 5326 5327 if (olh->count > 0) 5328 printf("Objects list:\n"); 5329 else 5330 printf("There are no objects\n"); 5331 ntlv = (ipfw_obj_ntlv *)(olh + 1); 5332 for (i = 0; i < olh->count; i++) { 5333 name = match_value(otypes, ntlv->head.type); 5334 if (name == NULL) 5335 name = lookup_eaction_name( 5336 (ipfw_obj_ntlv *)(olh + 1), olh->count, 5337 ntlv->head.type); 5338 if (name == NULL) 5339 printf(" kidx: %4d\ttype: %10d\tname: %s\n", 5340 ntlv->idx, ntlv->head.type, ntlv->name); 5341 else 5342 printf(" kidx: %4d\ttype: %10s\tname: %s\n", 5343 ntlv->idx, name, ntlv->name); 5344 ntlv++; 5345 } 5346 free(olh); 5347 } 5348 5349 void 5350 ipfw_internal_handler(int ac, char *av[]) 5351 { 5352 int tcmd; 5353 5354 ac--; av++; 5355 NEED1("internal cmd required"); 5356 5357 if ((tcmd = match_token(intcmds, *av)) == -1) 5358 errx(EX_USAGE, "invalid internal sub-cmd: %s", *av); 5359 5360 switch (tcmd) { 5361 case TOK_IFLIST: 5362 ipfw_list_tifaces(); 5363 break; 5364 case TOK_TALIST: 5365 ipfw_list_ta(ac, av); 5366 break; 5367 case TOK_OLIST: 5368 ipfw_list_objects(ac, av); 5369 break; 5370 case TOK_VLIST: 5371 ipfw_list_values(ac, av); 5372 break; 5373 } 5374 } 5375 5376 static int 5377 ipfw_get_tracked_ifaces(ipfw_obj_lheader **polh) 5378 { 5379 ipfw_obj_lheader req, *olh; 5380 size_t sz; 5381 5382 memset(&req, 0, sizeof(req)); 5383 sz = sizeof(req); 5384 5385 if (do_get3(IP_FW_XIFLIST, &req.opheader, &sz) != 0) { 5386 if (errno != ENOMEM) 5387 return (errno); 5388 } 5389 5390 sz = req.size; 5391 if ((olh = calloc(1, sz)) == NULL) 5392 return (ENOMEM); 5393 5394 olh->size = sz; 5395 if (do_get3(IP_FW_XIFLIST, &olh->opheader, &sz) != 0) { 5396 free(olh); 5397 return (errno); 5398 } 5399 5400 *polh = olh; 5401 return (0); 5402 } 5403 5404 static int 5405 ifinfo_cmp(const void *a, const void *b) 5406 { 5407 ipfw_iface_info *ia, *ib; 5408 5409 ia = (ipfw_iface_info *)a; 5410 ib = (ipfw_iface_info *)b; 5411 5412 return (stringnum_cmp(ia->ifname, ib->ifname)); 5413 } 5414 5415 /* 5416 * Retrieves table list from kernel, 5417 * optionally sorts it and calls requested function for each table. 5418 * Returns 0 on success. 5419 */ 5420 static void 5421 ipfw_list_tifaces() 5422 { 5423 ipfw_obj_lheader *olh; 5424 ipfw_iface_info *info; 5425 int i, error; 5426 5427 if ((error = ipfw_get_tracked_ifaces(&olh)) != 0) 5428 err(EX_OSERR, "Unable to request ipfw tracked interface list"); 5429 5430 5431 qsort(olh + 1, olh->count, olh->objsize, ifinfo_cmp); 5432 5433 info = (ipfw_iface_info *)(olh + 1); 5434 for (i = 0; i < olh->count; i++) { 5435 if (info->flags & IPFW_IFFLAG_RESOLVED) 5436 printf("%s ifindex: %d refcount: %u changes: %u\n", 5437 info->ifname, info->ifindex, info->refcnt, 5438 info->gencnt); 5439 else 5440 printf("%s ifindex: unresolved refcount: %u changes: %u\n", 5441 info->ifname, info->refcnt, info->gencnt); 5442 info = (ipfw_iface_info *)((caddr_t)info + olh->objsize); 5443 } 5444 5445 free(olh); 5446 } 5447 5448 5449 5450 5451