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 <jail.h> 36 #include <netdb.h> 37 #include <pwd.h> 38 #include <stdio.h> 39 #include <stdarg.h> 40 #include <stdint.h> 41 #include <stdlib.h> 42 #include <string.h> 43 #include <sysexits.h> 44 #include <time.h> /* ctime */ 45 #include <timeconv.h> /* _long_to_time */ 46 #include <unistd.h> 47 #include <fcntl.h> 48 #include <stddef.h> /* offsetof */ 49 50 #include <net/ethernet.h> 51 #include <net/if.h> /* only IFNAMSIZ */ 52 #include <netinet/in.h> 53 #include <netinet/in_systm.h> /* only n_short, n_long */ 54 #include <netinet/ip.h> 55 #include <netinet/ip_icmp.h> 56 #include <netinet/ip_fw.h> 57 #include <netinet/tcp.h> 58 #include <arpa/inet.h> 59 60 struct cmdline_opts co; /* global options */ 61 62 struct format_opts { 63 int bcwidth; 64 int pcwidth; 65 int show_counters; 66 int show_time; /* show timestamp */ 67 uint32_t set_mask; /* enabled sets mask */ 68 uint32_t flags; /* request flags */ 69 uint32_t first; /* first rule to request */ 70 uint32_t last; /* last rule to request */ 71 uint32_t dcnt; /* number of dynamic states */ 72 ipfw_obj_ctlv *tstate; /* table state data */ 73 }; 74 75 int resvd_set_number = RESVD_SET; 76 77 int ipfw_socket = -1; 78 79 #define CHECK_LENGTH(v, len) do { \ 80 if ((v) < (len)) \ 81 errx(EX_DATAERR, "Rule too long"); \ 82 } while (0) 83 /* 84 * Check if we have enough space in cmd buffer. Note that since 85 * first 8? u32 words are reserved by reserved header, full cmd 86 * buffer can't be used, so we need to protect from buffer overrun 87 * only. At the beginning, cblen is less than actual buffer size by 88 * size of ipfw_insn_u32 instruction + 1 u32 work. This eliminates need 89 * for checking small instructions fitting in given range. 90 * We also (ab)use the fact that ipfw_insn is always the first field 91 * for any custom instruction. 92 */ 93 #define CHECK_CMDLEN CHECK_LENGTH(cblen, F_LEN((ipfw_insn *)cmd)) 94 95 #define GET_UINT_ARG(arg, min, max, tok, s_x) do { \ 96 if (!av[0]) \ 97 errx(EX_USAGE, "%s: missing argument", match_value(s_x, tok)); \ 98 if (_substrcmp(*av, "tablearg") == 0) { \ 99 arg = IP_FW_TARG; \ 100 break; \ 101 } \ 102 \ 103 { \ 104 long _xval; \ 105 char *end; \ 106 \ 107 _xval = strtol(*av, &end, 10); \ 108 \ 109 if (!isdigit(**av) || *end != '\0' || (_xval == 0 && errno == EINVAL)) \ 110 errx(EX_DATAERR, "%s: invalid argument: %s", \ 111 match_value(s_x, tok), *av); \ 112 \ 113 if (errno == ERANGE || _xval < min || _xval > max) \ 114 errx(EX_DATAERR, "%s: argument is out of range (%u..%u): %s", \ 115 match_value(s_x, tok), min, max, *av); \ 116 \ 117 if (_xval == IP_FW_TARG) \ 118 errx(EX_DATAERR, "%s: illegal argument value: %s", \ 119 match_value(s_x, tok), *av); \ 120 arg = _xval; \ 121 } \ 122 } while (0) 123 124 static struct _s_x f_tcpflags[] = { 125 { "syn", TH_SYN }, 126 { "fin", TH_FIN }, 127 { "ack", TH_ACK }, 128 { "psh", TH_PUSH }, 129 { "rst", TH_RST }, 130 { "urg", TH_URG }, 131 { "tcp flag", 0 }, 132 { NULL, 0 } 133 }; 134 135 static struct _s_x f_tcpopts[] = { 136 { "mss", IP_FW_TCPOPT_MSS }, 137 { "maxseg", IP_FW_TCPOPT_MSS }, 138 { "window", IP_FW_TCPOPT_WINDOW }, 139 { "sack", IP_FW_TCPOPT_SACK }, 140 { "ts", IP_FW_TCPOPT_TS }, 141 { "timestamp", IP_FW_TCPOPT_TS }, 142 { "cc", IP_FW_TCPOPT_CC }, 143 { "tcp option", 0 }, 144 { NULL, 0 } 145 }; 146 147 /* 148 * IP options span the range 0 to 255 so we need to remap them 149 * (though in fact only the low 5 bits are significant). 150 */ 151 static struct _s_x f_ipopts[] = { 152 { "ssrr", IP_FW_IPOPT_SSRR}, 153 { "lsrr", IP_FW_IPOPT_LSRR}, 154 { "rr", IP_FW_IPOPT_RR}, 155 { "ts", IP_FW_IPOPT_TS}, 156 { "ip option", 0 }, 157 { NULL, 0 } 158 }; 159 160 static struct _s_x f_iptos[] = { 161 { "lowdelay", IPTOS_LOWDELAY}, 162 { "throughput", IPTOS_THROUGHPUT}, 163 { "reliability", IPTOS_RELIABILITY}, 164 { "mincost", IPTOS_MINCOST}, 165 { "congestion", IPTOS_ECN_CE}, 166 { "ecntransport", IPTOS_ECN_ECT0}, 167 { "ip tos option", 0}, 168 { NULL, 0 } 169 }; 170 171 struct _s_x f_ipdscp[] = { 172 { "af11", IPTOS_DSCP_AF11 >> 2 }, /* 001010 */ 173 { "af12", IPTOS_DSCP_AF12 >> 2 }, /* 001100 */ 174 { "af13", IPTOS_DSCP_AF13 >> 2 }, /* 001110 */ 175 { "af21", IPTOS_DSCP_AF21 >> 2 }, /* 010010 */ 176 { "af22", IPTOS_DSCP_AF22 >> 2 }, /* 010100 */ 177 { "af23", IPTOS_DSCP_AF23 >> 2 }, /* 010110 */ 178 { "af31", IPTOS_DSCP_AF31 >> 2 }, /* 011010 */ 179 { "af32", IPTOS_DSCP_AF32 >> 2 }, /* 011100 */ 180 { "af33", IPTOS_DSCP_AF33 >> 2 }, /* 011110 */ 181 { "af41", IPTOS_DSCP_AF41 >> 2 }, /* 100010 */ 182 { "af42", IPTOS_DSCP_AF42 >> 2 }, /* 100100 */ 183 { "af43", IPTOS_DSCP_AF43 >> 2 }, /* 100110 */ 184 { "be", IPTOS_DSCP_CS0 >> 2 }, /* 000000 */ 185 { "ef", IPTOS_DSCP_EF >> 2 }, /* 101110 */ 186 { "cs0", IPTOS_DSCP_CS0 >> 2 }, /* 000000 */ 187 { "cs1", IPTOS_DSCP_CS1 >> 2 }, /* 001000 */ 188 { "cs2", IPTOS_DSCP_CS2 >> 2 }, /* 010000 */ 189 { "cs3", IPTOS_DSCP_CS3 >> 2 }, /* 011000 */ 190 { "cs4", IPTOS_DSCP_CS4 >> 2 }, /* 100000 */ 191 { "cs5", IPTOS_DSCP_CS5 >> 2 }, /* 101000 */ 192 { "cs6", IPTOS_DSCP_CS6 >> 2 }, /* 110000 */ 193 { "cs7", IPTOS_DSCP_CS7 >> 2 }, /* 100000 */ 194 { NULL, 0 } 195 }; 196 197 static struct _s_x limit_masks[] = { 198 {"all", DYN_SRC_ADDR|DYN_SRC_PORT|DYN_DST_ADDR|DYN_DST_PORT}, 199 {"src-addr", DYN_SRC_ADDR}, 200 {"src-port", DYN_SRC_PORT}, 201 {"dst-addr", DYN_DST_ADDR}, 202 {"dst-port", DYN_DST_PORT}, 203 {NULL, 0} 204 }; 205 206 /* 207 * we use IPPROTO_ETHERTYPE as a fake protocol id to call the print routines 208 * This is only used in this code. 209 */ 210 #define IPPROTO_ETHERTYPE 0x1000 211 static struct _s_x ether_types[] = { 212 /* 213 * Note, we cannot use "-:&/" in the names because they are field 214 * separators in the type specifications. Also, we use s = NULL as 215 * end-delimiter, because a type of 0 can be legal. 216 */ 217 { "ip", 0x0800 }, 218 { "ipv4", 0x0800 }, 219 { "ipv6", 0x86dd }, 220 { "arp", 0x0806 }, 221 { "rarp", 0x8035 }, 222 { "vlan", 0x8100 }, 223 { "loop", 0x9000 }, 224 { "trail", 0x1000 }, 225 { "at", 0x809b }, 226 { "atalk", 0x809b }, 227 { "aarp", 0x80f3 }, 228 { "pppoe_disc", 0x8863 }, 229 { "pppoe_sess", 0x8864 }, 230 { "ipx_8022", 0x00E0 }, 231 { "ipx_8023", 0x0000 }, 232 { "ipx_ii", 0x8137 }, 233 { "ipx_snap", 0x8137 }, 234 { "ipx", 0x8137 }, 235 { "ns", 0x0600 }, 236 { NULL, 0 } 237 }; 238 239 static struct _s_x rule_eactions[] = { 240 { "nat64lsn", TOK_NAT64LSN }, 241 { "nat64stl", TOK_NAT64STL }, 242 { "nptv6", TOK_NPTV6 }, 243 { "tcp-setmss", TOK_TCPSETMSS }, 244 { NULL, 0 } /* terminator */ 245 }; 246 247 static struct _s_x rule_actions[] = { 248 { "abort6", TOK_ABORT6 }, 249 { "abort", TOK_ABORT }, 250 { "accept", TOK_ACCEPT }, 251 { "pass", TOK_ACCEPT }, 252 { "allow", TOK_ACCEPT }, 253 { "permit", TOK_ACCEPT }, 254 { "count", TOK_COUNT }, 255 { "pipe", TOK_PIPE }, 256 { "queue", TOK_QUEUE }, 257 { "divert", TOK_DIVERT }, 258 { "tee", TOK_TEE }, 259 { "netgraph", TOK_NETGRAPH }, 260 { "ngtee", TOK_NGTEE }, 261 { "fwd", TOK_FORWARD }, 262 { "forward", TOK_FORWARD }, 263 { "skipto", TOK_SKIPTO }, 264 { "deny", TOK_DENY }, 265 { "drop", TOK_DENY }, 266 { "reject", TOK_REJECT }, 267 { "reset6", TOK_RESET6 }, 268 { "reset", TOK_RESET }, 269 { "unreach6", TOK_UNREACH6 }, 270 { "unreach", TOK_UNREACH }, 271 { "check-state", TOK_CHECKSTATE }, 272 { "//", TOK_COMMENT }, 273 { "nat", TOK_NAT }, 274 { "reass", TOK_REASS }, 275 { "setfib", TOK_SETFIB }, 276 { "setdscp", TOK_SETDSCP }, 277 { "call", TOK_CALL }, 278 { "return", TOK_RETURN }, 279 { "eaction", TOK_EACTION }, 280 { "tcp-setmss", TOK_TCPSETMSS }, 281 { NULL, 0 } /* terminator */ 282 }; 283 284 static struct _s_x rule_action_params[] = { 285 { "altq", TOK_ALTQ }, 286 { "log", TOK_LOG }, 287 { "tag", TOK_TAG }, 288 { "untag", TOK_UNTAG }, 289 { NULL, 0 } /* terminator */ 290 }; 291 292 /* 293 * The 'lookup' instruction accepts one of the following arguments. 294 * -1 is a terminator for the list. 295 * Arguments are passed as v[1] in O_DST_LOOKUP options. 296 */ 297 static int lookup_key[] = { 298 TOK_DSTIP, TOK_SRCIP, TOK_DSTPORT, TOK_SRCPORT, 299 TOK_UID, TOK_JAIL, TOK_DSCP, -1 }; 300 301 static struct _s_x rule_options[] = { 302 { "tagged", TOK_TAGGED }, 303 { "uid", TOK_UID }, 304 { "gid", TOK_GID }, 305 { "jail", TOK_JAIL }, 306 { "in", TOK_IN }, 307 { "limit", TOK_LIMIT }, 308 { "set-limit", TOK_SETLIMIT }, 309 { "keep-state", TOK_KEEPSTATE }, 310 { "record-state", TOK_RECORDSTATE }, 311 { "bridged", TOK_LAYER2 }, 312 { "layer2", TOK_LAYER2 }, 313 { "out", TOK_OUT }, 314 { "diverted", TOK_DIVERTED }, 315 { "diverted-loopback", TOK_DIVERTEDLOOPBACK }, 316 { "diverted-output", TOK_DIVERTEDOUTPUT }, 317 { "xmit", TOK_XMIT }, 318 { "recv", TOK_RECV }, 319 { "via", TOK_VIA }, 320 { "fragment", TOK_FRAG }, 321 { "frag", TOK_FRAG }, 322 { "fib", TOK_FIB }, 323 { "ipoptions", TOK_IPOPTS }, 324 { "ipopts", TOK_IPOPTS }, 325 { "iplen", TOK_IPLEN }, 326 { "ipid", TOK_IPID }, 327 { "ipprecedence", TOK_IPPRECEDENCE }, 328 { "dscp", TOK_DSCP }, 329 { "iptos", TOK_IPTOS }, 330 { "ipttl", TOK_IPTTL }, 331 { "ipversion", TOK_IPVER }, 332 { "ipver", TOK_IPVER }, 333 { "estab", TOK_ESTAB }, 334 { "established", TOK_ESTAB }, 335 { "setup", TOK_SETUP }, 336 { "sockarg", TOK_SOCKARG }, 337 { "tcpdatalen", TOK_TCPDATALEN }, 338 { "tcpflags", TOK_TCPFLAGS }, 339 { "tcpflgs", TOK_TCPFLAGS }, 340 { "tcpoptions", TOK_TCPOPTS }, 341 { "tcpopts", TOK_TCPOPTS }, 342 { "tcpseq", TOK_TCPSEQ }, 343 { "tcpack", TOK_TCPACK }, 344 { "tcpwin", TOK_TCPWIN }, 345 { "icmptype", TOK_ICMPTYPES }, 346 { "icmptypes", TOK_ICMPTYPES }, 347 { "dst-ip", TOK_DSTIP }, 348 { "src-ip", TOK_SRCIP }, 349 { "dst-port", TOK_DSTPORT }, 350 { "src-port", TOK_SRCPORT }, 351 { "proto", TOK_PROTO }, 352 { "MAC", TOK_MAC }, 353 { "mac", TOK_MAC }, 354 { "mac-type", TOK_MACTYPE }, 355 { "verrevpath", TOK_VERREVPATH }, 356 { "versrcreach", TOK_VERSRCREACH }, 357 { "antispoof", TOK_ANTISPOOF }, 358 { "ipsec", TOK_IPSEC }, 359 { "icmp6type", TOK_ICMP6TYPES }, 360 { "icmp6types", TOK_ICMP6TYPES }, 361 { "ext6hdr", TOK_EXT6HDR}, 362 { "flow-id", TOK_FLOWID}, 363 { "ipv6", TOK_IPV6}, 364 { "ip6", TOK_IPV6}, 365 { "ipv4", TOK_IPV4}, 366 { "ip4", TOK_IPV4}, 367 { "dst-ipv6", TOK_DSTIP6}, 368 { "dst-ip6", TOK_DSTIP6}, 369 { "src-ipv6", TOK_SRCIP6}, 370 { "src-ip6", TOK_SRCIP6}, 371 { "lookup", TOK_LOOKUP}, 372 { "flow", TOK_FLOW}, 373 { "defer-action", TOK_SKIPACTION }, 374 { "defer-immediate-action", TOK_SKIPACTION }, 375 { "//", TOK_COMMENT }, 376 377 { "not", TOK_NOT }, /* pseudo option */ 378 { "!", /* escape ? */ TOK_NOT }, /* pseudo option */ 379 { "or", TOK_OR }, /* pseudo option */ 380 { "|", /* escape */ TOK_OR }, /* pseudo option */ 381 { "{", TOK_STARTBRACE }, /* pseudo option */ 382 { "(", TOK_STARTBRACE }, /* pseudo option */ 383 { "}", TOK_ENDBRACE }, /* pseudo option */ 384 { ")", TOK_ENDBRACE }, /* pseudo option */ 385 { NULL, 0 } /* terminator */ 386 }; 387 388 void bprint_uint_arg(struct buf_pr *bp, const char *str, uint32_t arg); 389 static int ipfw_get_config(struct cmdline_opts *co, struct format_opts *fo, 390 ipfw_cfg_lheader **pcfg, size_t *psize); 391 static int ipfw_show_config(struct cmdline_opts *co, struct format_opts *fo, 392 ipfw_cfg_lheader *cfg, size_t sz, int ac, char **av); 393 static void ipfw_list_tifaces(void); 394 395 struct tidx; 396 static uint16_t pack_object(struct tidx *tstate, char *name, int otype); 397 static uint16_t pack_table(struct tidx *tstate, char *name); 398 399 static char *table_search_ctlv(ipfw_obj_ctlv *ctlv, uint16_t idx); 400 static void object_sort_ctlv(ipfw_obj_ctlv *ctlv); 401 static char *object_search_ctlv(ipfw_obj_ctlv *ctlv, uint16_t idx, 402 uint16_t type); 403 404 /* 405 * Simple string buffer API. 406 * Used to simplify buffer passing between function and for 407 * transparent overrun handling. 408 */ 409 410 /* 411 * Allocates new buffer of given size @sz. 412 * 413 * Returns 0 on success. 414 */ 415 int 416 bp_alloc(struct buf_pr *b, size_t size) 417 { 418 memset(b, 0, sizeof(struct buf_pr)); 419 420 if ((b->buf = calloc(1, size)) == NULL) 421 return (ENOMEM); 422 423 b->ptr = b->buf; 424 b->size = size; 425 b->avail = b->size; 426 427 return (0); 428 } 429 430 void 431 bp_free(struct buf_pr *b) 432 { 433 434 free(b->buf); 435 } 436 437 /* 438 * Flushes buffer so new writer start from beginning. 439 */ 440 void 441 bp_flush(struct buf_pr *b) 442 { 443 444 b->ptr = b->buf; 445 b->avail = b->size; 446 b->buf[0] = '\0'; 447 } 448 449 /* 450 * Print message specified by @format and args. 451 * Automatically manage buffer space and transparently handle 452 * buffer overruns. 453 * 454 * Returns number of bytes that should have been printed. 455 */ 456 int 457 bprintf(struct buf_pr *b, char *format, ...) 458 { 459 va_list args; 460 int i; 461 462 va_start(args, format); 463 464 i = vsnprintf(b->ptr, b->avail, format, args); 465 va_end(args); 466 467 if (i > b->avail || i < 0) { 468 /* Overflow or print error */ 469 b->avail = 0; 470 } else { 471 b->ptr += i; 472 b->avail -= i; 473 } 474 475 b->needed += i; 476 477 return (i); 478 } 479 480 /* 481 * Special values printer for tablearg-aware opcodes. 482 */ 483 void 484 bprint_uint_arg(struct buf_pr *bp, const char *str, uint32_t arg) 485 { 486 487 if (str != NULL) 488 bprintf(bp, "%s", str); 489 if (arg == IP_FW_TARG) 490 bprintf(bp, "tablearg"); 491 else 492 bprintf(bp, "%u", arg); 493 } 494 495 /* 496 * Helper routine to print a possibly unaligned uint64_t on 497 * various platform. If width > 0, print the value with 498 * the desired width, followed by a space; 499 * otherwise, return the required width. 500 */ 501 int 502 pr_u64(struct buf_pr *b, uint64_t *pd, int width) 503 { 504 #ifdef TCC 505 #define U64_FMT "I64" 506 #else 507 #define U64_FMT "llu" 508 #endif 509 uint64_t u; 510 unsigned long long d; 511 512 bcopy (pd, &u, sizeof(u)); 513 d = u; 514 return (width > 0) ? 515 bprintf(b, "%*" U64_FMT " ", width, d) : 516 snprintf(NULL, 0, "%" U64_FMT, d) ; 517 #undef U64_FMT 518 } 519 520 521 void * 522 safe_calloc(size_t number, size_t size) 523 { 524 void *ret = calloc(number, size); 525 526 if (ret == NULL) 527 err(EX_OSERR, "calloc"); 528 return ret; 529 } 530 531 void * 532 safe_realloc(void *ptr, size_t size) 533 { 534 void *ret = realloc(ptr, size); 535 536 if (ret == NULL) 537 err(EX_OSERR, "realloc"); 538 return ret; 539 } 540 541 /* 542 * Compare things like interface or table names. 543 */ 544 int 545 stringnum_cmp(const char *a, const char *b) 546 { 547 int la, lb; 548 549 la = strlen(a); 550 lb = strlen(b); 551 552 if (la > lb) 553 return (1); 554 else if (la < lb) 555 return (-01); 556 557 return (strcmp(a, b)); 558 } 559 560 561 /* 562 * conditionally runs the command. 563 * Selected options or negative -> getsockopt 564 */ 565 int 566 do_cmd(int optname, void *optval, uintptr_t optlen) 567 { 568 int i; 569 570 if (co.test_only) 571 return 0; 572 573 if (ipfw_socket == -1) 574 ipfw_socket = socket(AF_INET, SOCK_RAW, IPPROTO_RAW); 575 if (ipfw_socket < 0) 576 err(EX_UNAVAILABLE, "socket"); 577 578 if (optname == IP_FW_GET || optname == IP_DUMMYNET_GET || 579 optname == IP_FW_ADD || optname == IP_FW3 || 580 optname == IP_FW_NAT_GET_CONFIG || 581 optname < 0 || 582 optname == IP_FW_NAT_GET_LOG) { 583 if (optname < 0) 584 optname = -optname; 585 i = getsockopt(ipfw_socket, IPPROTO_IP, optname, optval, 586 (socklen_t *)optlen); 587 } else { 588 i = setsockopt(ipfw_socket, IPPROTO_IP, optname, optval, optlen); 589 } 590 return i; 591 } 592 593 /* 594 * do_set3 - pass ipfw control cmd to kernel 595 * @optname: option name 596 * @optval: pointer to option data 597 * @optlen: option length 598 * 599 * Assumes op3 header is already embedded. 600 * Calls setsockopt() with IP_FW3 as kernel-visible opcode. 601 * Returns 0 on success or errno otherwise. 602 */ 603 int 604 do_set3(int optname, ip_fw3_opheader *op3, size_t optlen) 605 { 606 607 if (co.test_only) 608 return (0); 609 610 if (ipfw_socket == -1) 611 ipfw_socket = socket(AF_INET, SOCK_RAW, IPPROTO_RAW); 612 if (ipfw_socket < 0) 613 err(EX_UNAVAILABLE, "socket"); 614 615 op3->opcode = optname; 616 617 return (setsockopt(ipfw_socket, IPPROTO_IP, IP_FW3, op3, optlen)); 618 } 619 620 /* 621 * do_get3 - pass ipfw control cmd to kernel 622 * @optname: option name 623 * @optval: pointer to option data 624 * @optlen: pointer to option length 625 * 626 * Assumes op3 header is already embedded. 627 * Calls getsockopt() with IP_FW3 as kernel-visible opcode. 628 * Returns 0 on success or errno otherwise. 629 */ 630 int 631 do_get3(int optname, ip_fw3_opheader *op3, size_t *optlen) 632 { 633 int error; 634 socklen_t len; 635 636 if (co.test_only) 637 return (0); 638 639 if (ipfw_socket == -1) 640 ipfw_socket = socket(AF_INET, SOCK_RAW, IPPROTO_RAW); 641 if (ipfw_socket < 0) 642 err(EX_UNAVAILABLE, "socket"); 643 644 op3->opcode = optname; 645 646 len = *optlen; 647 error = getsockopt(ipfw_socket, IPPROTO_IP, IP_FW3, op3, &len); 648 *optlen = len; 649 650 return (error); 651 } 652 653 /** 654 * match_token takes a table and a string, returns the value associated 655 * with the string (-1 in case of failure). 656 */ 657 int 658 match_token(struct _s_x *table, const char *string) 659 { 660 struct _s_x *pt; 661 uint i = strlen(string); 662 663 for (pt = table ; i && pt->s != NULL ; pt++) 664 if (strlen(pt->s) == i && !bcmp(string, pt->s, i)) 665 return pt->x; 666 return (-1); 667 } 668 669 /** 670 * match_token_relaxed takes a table and a string, returns the value associated 671 * with the string for the best match. 672 * 673 * Returns: 674 * value from @table for matched records 675 * -1 for non-matched records 676 * -2 if more than one records match @string. 677 */ 678 int 679 match_token_relaxed(struct _s_x *table, const char *string) 680 { 681 struct _s_x *pt, *m; 682 int i, c; 683 684 i = strlen(string); 685 c = 0; 686 687 for (pt = table ; i != 0 && pt->s != NULL ; pt++) { 688 if (strncmp(pt->s, string, i) != 0) 689 continue; 690 m = pt; 691 c++; 692 } 693 694 if (c == 1) 695 return (m->x); 696 697 return (c > 0 ? -2: -1); 698 } 699 700 int 701 get_token(struct _s_x *table, const char *string, const char *errbase) 702 { 703 int tcmd; 704 705 if ((tcmd = match_token_relaxed(table, string)) < 0) 706 errx(EX_USAGE, "%s %s %s", 707 (tcmd == 0) ? "invalid" : "ambiguous", errbase, string); 708 709 return (tcmd); 710 } 711 712 /** 713 * match_value takes a table and a value, returns the string associated 714 * with the value (NULL in case of failure). 715 */ 716 char const * 717 match_value(struct _s_x *p, int value) 718 { 719 for (; p->s != NULL; p++) 720 if (p->x == value) 721 return p->s; 722 return NULL; 723 } 724 725 size_t 726 concat_tokens(char *buf, size_t bufsize, struct _s_x *table, char *delimiter) 727 { 728 struct _s_x *pt; 729 int l; 730 size_t sz; 731 732 for (sz = 0, pt = table ; pt->s != NULL; pt++) { 733 l = snprintf(buf + sz, bufsize - sz, "%s%s", 734 (sz == 0) ? "" : delimiter, pt->s); 735 sz += l; 736 bufsize += l; 737 if (sz > bufsize) 738 return (bufsize); 739 } 740 741 return (sz); 742 } 743 744 /* 745 * helper function to process a set of flags and set bits in the 746 * appropriate masks. 747 */ 748 int 749 fill_flags(struct _s_x *flags, char *p, char **e, uint32_t *set, 750 uint32_t *clear) 751 { 752 char *q; /* points to the separator */ 753 int val; 754 uint32_t *which; /* mask we are working on */ 755 756 while (p && *p) { 757 if (*p == '!') { 758 p++; 759 which = clear; 760 } else 761 which = set; 762 q = strchr(p, ','); 763 if (q) 764 *q++ = '\0'; 765 val = match_token(flags, p); 766 if (val <= 0) { 767 if (e != NULL) 768 *e = p; 769 return (-1); 770 } 771 *which |= (uint32_t)val; 772 p = q; 773 } 774 return (0); 775 } 776 777 void 778 print_flags_buffer(char *buf, size_t sz, struct _s_x *list, uint32_t set) 779 { 780 char const *comma = ""; 781 int i, l; 782 783 for (i = 0; list[i].x != 0; i++) { 784 if ((set & list[i].x) == 0) 785 continue; 786 787 set &= ~list[i].x; 788 l = snprintf(buf, sz, "%s%s", comma, list[i].s); 789 if (l >= sz) 790 return; 791 comma = ","; 792 buf += l; 793 sz -=l; 794 } 795 } 796 797 /* 798 * _substrcmp takes two strings and returns 1 if they do not match, 799 * and 0 if they match exactly or the first string is a sub-string 800 * of the second. A warning is printed to stderr in the case that the 801 * first string is a sub-string of the second. 802 * 803 * This function will be removed in the future through the usual 804 * deprecation process. 805 */ 806 int 807 _substrcmp(const char *str1, const char* str2) 808 { 809 810 if (strncmp(str1, str2, strlen(str1)) != 0) 811 return 1; 812 813 if (strlen(str1) != strlen(str2)) 814 warnx("DEPRECATED: '%s' matched '%s' as a sub-string", 815 str1, str2); 816 return 0; 817 } 818 819 /* 820 * _substrcmp2 takes three strings and returns 1 if the first two do not match, 821 * and 0 if they match exactly or the second string is a sub-string 822 * of the first. A warning is printed to stderr in the case that the 823 * first string does not match the third. 824 * 825 * This function exists to warn about the bizarre construction 826 * strncmp(str, "by", 2) which is used to allow people to use a shortcut 827 * for "bytes". The problem is that in addition to accepting "by", 828 * "byt", "byte", and "bytes", it also excepts "by_rabid_dogs" and any 829 * other string beginning with "by". 830 * 831 * This function will be removed in the future through the usual 832 * deprecation process. 833 */ 834 int 835 _substrcmp2(const char *str1, const char* str2, const char* str3) 836 { 837 838 if (strncmp(str1, str2, strlen(str2)) != 0) 839 return 1; 840 841 if (strcmp(str1, str3) != 0) 842 warnx("DEPRECATED: '%s' matched '%s'", 843 str1, str3); 844 return 0; 845 } 846 847 /* 848 * prints one port, symbolic or numeric 849 */ 850 static void 851 print_port(struct buf_pr *bp, int proto, uint16_t port) 852 { 853 854 if (proto == IPPROTO_ETHERTYPE) { 855 char const *s; 856 857 if (co.do_resolv && (s = match_value(ether_types, port)) ) 858 bprintf(bp, "%s", s); 859 else 860 bprintf(bp, "0x%04x", port); 861 } else { 862 struct servent *se = NULL; 863 if (co.do_resolv) { 864 struct protoent *pe = getprotobynumber(proto); 865 866 se = getservbyport(htons(port), pe ? pe->p_name : NULL); 867 } 868 if (se) 869 bprintf(bp, "%s", se->s_name); 870 else 871 bprintf(bp, "%d", port); 872 } 873 } 874 875 static struct _s_x _port_name[] = { 876 {"dst-port", O_IP_DSTPORT}, 877 {"src-port", O_IP_SRCPORT}, 878 {"ipid", O_IPID}, 879 {"iplen", O_IPLEN}, 880 {"ipttl", O_IPTTL}, 881 {"mac-type", O_MAC_TYPE}, 882 {"tcpdatalen", O_TCPDATALEN}, 883 {"tcpwin", O_TCPWIN}, 884 {"tagged", O_TAGGED}, 885 {NULL, 0} 886 }; 887 888 /* 889 * Print the values in a list 16-bit items of the types above. 890 * XXX todo: add support for mask. 891 */ 892 static void 893 print_newports(struct buf_pr *bp, ipfw_insn_u16 *cmd, int proto, int opcode) 894 { 895 uint16_t *p = cmd->ports; 896 int i; 897 char const *sep; 898 899 if (opcode != 0) { 900 sep = match_value(_port_name, opcode); 901 if (sep == NULL) 902 sep = "???"; 903 bprintf(bp, " %s", sep); 904 } 905 sep = " "; 906 for (i = F_LEN((ipfw_insn *)cmd) - 1; i > 0; i--, p += 2) { 907 bprintf(bp, "%s", sep); 908 print_port(bp, proto, p[0]); 909 if (p[0] != p[1]) { 910 bprintf(bp, "-"); 911 print_port(bp, proto, p[1]); 912 } 913 sep = ","; 914 } 915 } 916 917 /* 918 * Like strtol, but also translates service names into port numbers 919 * for some protocols. 920 * In particular: 921 * proto == -1 disables the protocol check; 922 * proto == IPPROTO_ETHERTYPE looks up an internal table 923 * proto == <some value in /etc/protocols> matches the values there. 924 * Returns *end == s in case the parameter is not found. 925 */ 926 static int 927 strtoport(char *s, char **end, int base, int proto) 928 { 929 char *p, *buf; 930 char *s1; 931 int i; 932 933 *end = s; /* default - not found */ 934 if (*s == '\0') 935 return 0; /* not found */ 936 937 if (isdigit(*s)) 938 return strtol(s, end, base); 939 940 /* 941 * find separator. '\\' escapes the next char. 942 */ 943 for (s1 = s; *s1 && (isalnum(*s1) || *s1 == '\\') ; s1++) 944 if (*s1 == '\\' && s1[1] != '\0') 945 s1++; 946 947 buf = safe_calloc(s1 - s + 1, 1); 948 949 /* 950 * copy into a buffer skipping backslashes 951 */ 952 for (p = s, i = 0; p != s1 ; p++) 953 if (*p != '\\') 954 buf[i++] = *p; 955 buf[i++] = '\0'; 956 957 if (proto == IPPROTO_ETHERTYPE) { 958 i = match_token(ether_types, buf); 959 free(buf); 960 if (i != -1) { /* found */ 961 *end = s1; 962 return i; 963 } 964 } else { 965 struct protoent *pe = NULL; 966 struct servent *se; 967 968 if (proto != 0) 969 pe = getprotobynumber(proto); 970 setservent(1); 971 se = getservbyname(buf, pe ? pe->p_name : NULL); 972 free(buf); 973 if (se != NULL) { 974 *end = s1; 975 return ntohs(se->s_port); 976 } 977 } 978 return 0; /* not found */ 979 } 980 981 /* 982 * Fill the body of the command with the list of port ranges. 983 */ 984 static int 985 fill_newports(ipfw_insn_u16 *cmd, char *av, int proto, int cblen) 986 { 987 uint16_t a, b, *p = cmd->ports; 988 int i = 0; 989 char *s = av; 990 991 while (*s) { 992 a = strtoport(av, &s, 0, proto); 993 if (s == av) /* empty or invalid argument */ 994 return (0); 995 996 CHECK_LENGTH(cblen, i + 2); 997 998 switch (*s) { 999 case '-': /* a range */ 1000 av = s + 1; 1001 b = strtoport(av, &s, 0, proto); 1002 /* Reject expressions like '1-abc' or '1-2-3'. */ 1003 if (s == av || (*s != ',' && *s != '\0')) 1004 return (0); 1005 p[0] = a; 1006 p[1] = b; 1007 break; 1008 case ',': /* comma separated list */ 1009 case '\0': 1010 p[0] = p[1] = a; 1011 break; 1012 default: 1013 warnx("port list: invalid separator <%c> in <%s>", 1014 *s, av); 1015 return (0); 1016 } 1017 1018 i++; 1019 p += 2; 1020 av = s + 1; 1021 } 1022 if (i > 0) { 1023 if (i + 1 > F_LEN_MASK) 1024 errx(EX_DATAERR, "too many ports/ranges\n"); 1025 cmd->o.len |= i + 1; /* leave F_NOT and F_OR untouched */ 1026 } 1027 return (i); 1028 } 1029 1030 /* 1031 * Fill the body of the command with the list of DiffServ codepoints. 1032 */ 1033 static void 1034 fill_dscp(ipfw_insn *cmd, char *av, int cblen) 1035 { 1036 uint32_t *low, *high; 1037 char *s = av, *a; 1038 int code; 1039 1040 cmd->opcode = O_DSCP; 1041 cmd->len |= F_INSN_SIZE(ipfw_insn_u32) + 1; 1042 1043 CHECK_CMDLEN; 1044 1045 low = (uint32_t *)(cmd + 1); 1046 high = low + 1; 1047 1048 *low = 0; 1049 *high = 0; 1050 1051 while (s != NULL) { 1052 a = strchr(s, ','); 1053 1054 if (a != NULL) 1055 *a++ = '\0'; 1056 1057 if (isalpha(*s)) { 1058 if ((code = match_token(f_ipdscp, s)) == -1) 1059 errx(EX_DATAERR, "Unknown DSCP code"); 1060 } else { 1061 code = strtoul(s, NULL, 10); 1062 if (code < 0 || code > 63) 1063 errx(EX_DATAERR, "Invalid DSCP value"); 1064 } 1065 1066 if (code >= 32) 1067 *high |= 1 << (code - 32); 1068 else 1069 *low |= 1 << code; 1070 1071 s = a; 1072 } 1073 } 1074 1075 static struct _s_x icmpcodes[] = { 1076 { "net", ICMP_UNREACH_NET }, 1077 { "host", ICMP_UNREACH_HOST }, 1078 { "protocol", ICMP_UNREACH_PROTOCOL }, 1079 { "port", ICMP_UNREACH_PORT }, 1080 { "needfrag", ICMP_UNREACH_NEEDFRAG }, 1081 { "srcfail", ICMP_UNREACH_SRCFAIL }, 1082 { "net-unknown", ICMP_UNREACH_NET_UNKNOWN }, 1083 { "host-unknown", ICMP_UNREACH_HOST_UNKNOWN }, 1084 { "isolated", ICMP_UNREACH_ISOLATED }, 1085 { "net-prohib", ICMP_UNREACH_NET_PROHIB }, 1086 { "host-prohib", ICMP_UNREACH_HOST_PROHIB }, 1087 { "tosnet", ICMP_UNREACH_TOSNET }, 1088 { "toshost", ICMP_UNREACH_TOSHOST }, 1089 { "filter-prohib", ICMP_UNREACH_FILTER_PROHIB }, 1090 { "host-precedence", ICMP_UNREACH_HOST_PRECEDENCE }, 1091 { "precedence-cutoff", ICMP_UNREACH_PRECEDENCE_CUTOFF }, 1092 { NULL, 0 } 1093 }; 1094 1095 static void 1096 fill_reject_code(u_short *codep, char *str) 1097 { 1098 int val; 1099 char *s; 1100 1101 val = strtoul(str, &s, 0); 1102 if (s == str || *s != '\0' || val >= 0x100) 1103 val = match_token(icmpcodes, str); 1104 if (val < 0) 1105 errx(EX_DATAERR, "unknown ICMP unreachable code ``%s''", str); 1106 *codep = val; 1107 return; 1108 } 1109 1110 static void 1111 print_reject_code(struct buf_pr *bp, uint16_t code) 1112 { 1113 char const *s; 1114 1115 if ((s = match_value(icmpcodes, code)) != NULL) 1116 bprintf(bp, "unreach %s", s); 1117 else 1118 bprintf(bp, "unreach %u", code); 1119 } 1120 1121 /* 1122 * Returns the number of bits set (from left) in a contiguous bitmask, 1123 * or -1 if the mask is not contiguous. 1124 * XXX this needs a proper fix. 1125 * This effectively works on masks in big-endian (network) format. 1126 * when compiled on little endian architectures. 1127 * 1128 * First bit is bit 7 of the first byte -- note, for MAC addresses, 1129 * the first bit on the wire is bit 0 of the first byte. 1130 * len is the max length in bits. 1131 */ 1132 int 1133 contigmask(uint8_t *p, int len) 1134 { 1135 int i, n; 1136 1137 for (i=0; i<len ; i++) 1138 if ( (p[i/8] & (1 << (7 - (i%8)))) == 0) /* first bit unset */ 1139 break; 1140 for (n=i+1; n < len; n++) 1141 if ( (p[n/8] & (1 << (7 - (n%8)))) != 0) 1142 return -1; /* mask not contiguous */ 1143 return i; 1144 } 1145 1146 /* 1147 * print flags set/clear in the two bitmasks passed as parameters. 1148 * There is a specialized check for f_tcpflags. 1149 */ 1150 static void 1151 print_flags(struct buf_pr *bp, char const *name, ipfw_insn *cmd, 1152 struct _s_x *list) 1153 { 1154 char const *comma = ""; 1155 int i; 1156 uint8_t set = cmd->arg1 & 0xff; 1157 uint8_t clear = (cmd->arg1 >> 8) & 0xff; 1158 1159 if (list == f_tcpflags && set == TH_SYN && clear == TH_ACK) { 1160 bprintf(bp, " setup"); 1161 return; 1162 } 1163 1164 bprintf(bp, " %s ", name); 1165 for (i=0; list[i].x != 0; i++) { 1166 if (set & list[i].x) { 1167 set &= ~list[i].x; 1168 bprintf(bp, "%s%s", comma, list[i].s); 1169 comma = ","; 1170 } 1171 if (clear & list[i].x) { 1172 clear &= ~list[i].x; 1173 bprintf(bp, "%s!%s", comma, list[i].s); 1174 comma = ","; 1175 } 1176 } 1177 } 1178 1179 1180 /* 1181 * Print the ip address contained in a command. 1182 */ 1183 static void 1184 print_ip(struct buf_pr *bp, const struct format_opts *fo, ipfw_insn_ip *cmd) 1185 { 1186 struct hostent *he = NULL; 1187 struct in_addr *ia; 1188 uint32_t len = F_LEN((ipfw_insn *)cmd); 1189 uint32_t *a = ((ipfw_insn_u32 *)cmd)->d; 1190 char *t; 1191 1192 bprintf(bp, " "); 1193 if (cmd->o.opcode == O_IP_DST_LOOKUP && len > F_INSN_SIZE(ipfw_insn_u32)) { 1194 uint32_t d = a[1]; 1195 const char *arg = "<invalid>"; 1196 1197 if (d < sizeof(lookup_key)/sizeof(lookup_key[0])) 1198 arg = match_value(rule_options, lookup_key[d]); 1199 t = table_search_ctlv(fo->tstate, ((ipfw_insn *)cmd)->arg1); 1200 bprintf(bp, "lookup %s %s", arg, t); 1201 return; 1202 } 1203 if (cmd->o.opcode == O_IP_SRC_ME || cmd->o.opcode == O_IP_DST_ME) { 1204 bprintf(bp, "me"); 1205 return; 1206 } 1207 if (cmd->o.opcode == O_IP_SRC_LOOKUP || 1208 cmd->o.opcode == O_IP_DST_LOOKUP) { 1209 t = table_search_ctlv(fo->tstate, ((ipfw_insn *)cmd)->arg1); 1210 bprintf(bp, "table(%s", t); 1211 if (len == F_INSN_SIZE(ipfw_insn_u32)) 1212 bprintf(bp, ",%u", *a); 1213 bprintf(bp, ")"); 1214 return; 1215 } 1216 if (cmd->o.opcode == O_IP_SRC_SET || cmd->o.opcode == O_IP_DST_SET) { 1217 uint32_t x, *map = (uint32_t *)&(cmd->mask); 1218 int i, j; 1219 char comma = '{'; 1220 1221 x = cmd->o.arg1 - 1; 1222 x = htonl( ~x ); 1223 cmd->addr.s_addr = htonl(cmd->addr.s_addr); 1224 bprintf(bp, "%s/%d", inet_ntoa(cmd->addr), 1225 contigmask((uint8_t *)&x, 32)); 1226 x = cmd->addr.s_addr = htonl(cmd->addr.s_addr); 1227 x &= 0xff; /* base */ 1228 /* 1229 * Print bits and ranges. 1230 * Locate first bit set (i), then locate first bit unset (j). 1231 * If we have 3+ consecutive bits set, then print them as a 1232 * range, otherwise only print the initial bit and rescan. 1233 */ 1234 for (i=0; i < cmd->o.arg1; i++) 1235 if (map[i/32] & (1<<(i & 31))) { 1236 for (j=i+1; j < cmd->o.arg1; j++) 1237 if (!(map[ j/32] & (1<<(j & 31)))) 1238 break; 1239 bprintf(bp, "%c%d", comma, i+x); 1240 if (j>i+2) { /* range has at least 3 elements */ 1241 bprintf(bp, "-%d", j-1+x); 1242 i = j-1; 1243 } 1244 comma = ','; 1245 } 1246 bprintf(bp, "}"); 1247 return; 1248 } 1249 /* 1250 * len == 2 indicates a single IP, whereas lists of 1 or more 1251 * addr/mask pairs have len = (2n+1). We convert len to n so we 1252 * use that to count the number of entries. 1253 */ 1254 for (len = len / 2; len > 0; len--, a += 2) { 1255 int mb = /* mask length */ 1256 (cmd->o.opcode == O_IP_SRC || cmd->o.opcode == O_IP_DST) ? 1257 32 : contigmask((uint8_t *)&(a[1]), 32); 1258 if (mb == 32 && co.do_resolv) 1259 he = gethostbyaddr((char *)&(a[0]), sizeof(u_long), AF_INET); 1260 if (he != NULL) /* resolved to name */ 1261 bprintf(bp, "%s", he->h_name); 1262 else if (mb == 0) /* any */ 1263 bprintf(bp, "any"); 1264 else { /* numeric IP followed by some kind of mask */ 1265 ia = (struct in_addr *)&a[0]; 1266 bprintf(bp, "%s", inet_ntoa(*ia)); 1267 if (mb < 0) { 1268 ia = (struct in_addr *)&a[1]; 1269 bprintf(bp, ":%s", inet_ntoa(*ia)); 1270 } else if (mb < 32) 1271 bprintf(bp, "/%d", mb); 1272 } 1273 if (len > 1) 1274 bprintf(bp, ","); 1275 } 1276 } 1277 1278 /* 1279 * prints a MAC address/mask pair 1280 */ 1281 static void 1282 format_mac(struct buf_pr *bp, uint8_t *addr, uint8_t *mask) 1283 { 1284 int l = contigmask(mask, 48); 1285 1286 if (l == 0) 1287 bprintf(bp, " any"); 1288 else { 1289 bprintf(bp, " %02x:%02x:%02x:%02x:%02x:%02x", 1290 addr[0], addr[1], addr[2], addr[3], addr[4], addr[5]); 1291 if (l == -1) 1292 bprintf(bp, "&%02x:%02x:%02x:%02x:%02x:%02x", 1293 mask[0], mask[1], mask[2], 1294 mask[3], mask[4], mask[5]); 1295 else if (l < 48) 1296 bprintf(bp, "/%d", l); 1297 } 1298 } 1299 1300 static void 1301 print_mac(struct buf_pr *bp, ipfw_insn_mac *mac) 1302 { 1303 1304 bprintf(bp, " MAC"); 1305 format_mac(bp, mac->addr, mac->mask); 1306 format_mac(bp, mac->addr + 6, mac->mask + 6); 1307 } 1308 1309 static void 1310 fill_icmptypes(ipfw_insn_u32 *cmd, char *av) 1311 { 1312 uint8_t type; 1313 1314 cmd->d[0] = 0; 1315 while (*av) { 1316 if (*av == ',') 1317 av++; 1318 1319 type = strtoul(av, &av, 0); 1320 1321 if (*av != ',' && *av != '\0') 1322 errx(EX_DATAERR, "invalid ICMP type"); 1323 1324 if (type > 31) 1325 errx(EX_DATAERR, "ICMP type out of range"); 1326 1327 cmd->d[0] |= 1 << type; 1328 } 1329 cmd->o.opcode = O_ICMPTYPE; 1330 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32); 1331 } 1332 1333 static void 1334 print_icmptypes(struct buf_pr *bp, ipfw_insn_u32 *cmd) 1335 { 1336 int i; 1337 char sep= ' '; 1338 1339 bprintf(bp, " icmptypes"); 1340 for (i = 0; i < 32; i++) { 1341 if ( (cmd->d[0] & (1 << (i))) == 0) 1342 continue; 1343 bprintf(bp, "%c%d", sep, i); 1344 sep = ','; 1345 } 1346 } 1347 1348 static void 1349 print_dscp(struct buf_pr *bp, ipfw_insn_u32 *cmd) 1350 { 1351 int i = 0; 1352 uint32_t *v; 1353 char sep= ' '; 1354 const char *code; 1355 1356 bprintf(bp, " dscp"); 1357 v = cmd->d; 1358 while (i < 64) { 1359 if (*v & (1 << i)) { 1360 if ((code = match_value(f_ipdscp, i)) != NULL) 1361 bprintf(bp, "%c%s", sep, code); 1362 else 1363 bprintf(bp, "%c%d", sep, i); 1364 sep = ','; 1365 } 1366 1367 if ((++i % 32) == 0) 1368 v++; 1369 } 1370 } 1371 1372 #define insntod(cmd, type) ((ipfw_insn_ ## type *)(cmd)) 1373 struct show_state { 1374 struct ip_fw_rule *rule; 1375 const ipfw_insn *eaction; 1376 uint8_t *printed; 1377 int flags; 1378 #define HAVE_PROTO 0x0001 1379 #define HAVE_SRCIP 0x0002 1380 #define HAVE_DSTIP 0x0004 1381 #define HAVE_PROBE_STATE 0x0008 1382 int proto; 1383 int or_block; 1384 }; 1385 1386 static int 1387 init_show_state(struct show_state *state, struct ip_fw_rule *rule) 1388 { 1389 1390 state->printed = calloc(rule->cmd_len, sizeof(uint8_t)); 1391 if (state->printed == NULL) 1392 return (ENOMEM); 1393 state->rule = rule; 1394 state->eaction = NULL; 1395 state->flags = 0; 1396 state->proto = 0; 1397 state->or_block = 0; 1398 return (0); 1399 } 1400 1401 static void 1402 free_show_state(struct show_state *state) 1403 { 1404 1405 free(state->printed); 1406 } 1407 1408 static uint8_t 1409 is_printed_opcode(struct show_state *state, const ipfw_insn *cmd) 1410 { 1411 1412 return (state->printed[cmd - state->rule->cmd]); 1413 } 1414 1415 static void 1416 mark_printed(struct show_state *state, const ipfw_insn *cmd) 1417 { 1418 1419 state->printed[cmd - state->rule->cmd] = 1; 1420 } 1421 1422 static void 1423 print_limit_mask(struct buf_pr *bp, const ipfw_insn_limit *limit) 1424 { 1425 struct _s_x *p = limit_masks; 1426 char const *comma = " "; 1427 uint8_t x; 1428 1429 for (x = limit->limit_mask; p->x != 0; p++) { 1430 if ((x & p->x) == p->x) { 1431 x &= ~p->x; 1432 bprintf(bp, "%s%s", comma, p->s); 1433 comma = ","; 1434 } 1435 } 1436 bprint_uint_arg(bp, " ", limit->conn_limit); 1437 } 1438 1439 static int 1440 print_instruction(struct buf_pr *bp, const struct format_opts *fo, 1441 struct show_state *state, ipfw_insn *cmd) 1442 { 1443 struct protoent *pe; 1444 struct passwd *pwd; 1445 struct group *grp; 1446 const char *s; 1447 double d; 1448 1449 if (is_printed_opcode(state, cmd)) 1450 return (0); 1451 if ((cmd->len & F_OR) != 0 && state->or_block == 0) 1452 bprintf(bp, " {"); 1453 if (cmd->opcode != O_IN && (cmd->len & F_NOT) != 0) 1454 bprintf(bp, " not"); 1455 1456 switch (cmd->opcode) { 1457 case O_PROB: 1458 d = 1.0 * insntod(cmd, u32)->d[0] / 0x7fffffff; 1459 bprintf(bp, "prob %f ", d); 1460 break; 1461 case O_PROBE_STATE: /* no need to print anything here */ 1462 state->flags |= HAVE_PROBE_STATE; 1463 break; 1464 case O_IP_SRC: 1465 case O_IP_SRC_LOOKUP: 1466 case O_IP_SRC_MASK: 1467 case O_IP_SRC_ME: 1468 case O_IP_SRC_SET: 1469 if (state->flags & HAVE_SRCIP) 1470 bprintf(bp, " src-ip"); 1471 print_ip(bp, fo, insntod(cmd, ip)); 1472 break; 1473 case O_IP_DST: 1474 case O_IP_DST_LOOKUP: 1475 case O_IP_DST_MASK: 1476 case O_IP_DST_ME: 1477 case O_IP_DST_SET: 1478 if (state->flags & HAVE_DSTIP) 1479 bprintf(bp, " dst-ip"); 1480 print_ip(bp, fo, insntod(cmd, ip)); 1481 break; 1482 case O_IP6_SRC: 1483 case O_IP6_SRC_MASK: 1484 case O_IP6_SRC_ME: 1485 if (state->flags & HAVE_SRCIP) 1486 bprintf(bp, " src-ip6"); 1487 print_ip6(bp, insntod(cmd, ip6)); 1488 break; 1489 case O_IP6_DST: 1490 case O_IP6_DST_MASK: 1491 case O_IP6_DST_ME: 1492 if (state->flags & HAVE_DSTIP) 1493 bprintf(bp, " dst-ip6"); 1494 print_ip6(bp, insntod(cmd, ip6)); 1495 break; 1496 case O_FLOW6ID: 1497 print_flow6id(bp, insntod(cmd, u32)); 1498 break; 1499 case O_IP_DSTPORT: 1500 case O_IP_SRCPORT: 1501 print_newports(bp, insntod(cmd, u16), state->proto, 1502 (state->flags & (HAVE_SRCIP | HAVE_DSTIP)) == 1503 (HAVE_SRCIP | HAVE_DSTIP) ? cmd->opcode: 0); 1504 break; 1505 case O_PROTO: 1506 pe = getprotobynumber(cmd->arg1); 1507 if (state->flags & HAVE_PROTO) 1508 bprintf(bp, " proto"); 1509 if (pe != NULL) 1510 bprintf(bp, " %s", pe->p_name); 1511 else 1512 bprintf(bp, " %u", cmd->arg1); 1513 break; 1514 case O_MACADDR2: 1515 print_mac(bp, insntod(cmd, mac)); 1516 break; 1517 case O_MAC_TYPE: 1518 print_newports(bp, insntod(cmd, u16), 1519 IPPROTO_ETHERTYPE, cmd->opcode); 1520 break; 1521 case O_FRAG: 1522 bprintf(bp, " frag"); 1523 break; 1524 case O_FIB: 1525 bprintf(bp, " fib %u", cmd->arg1); 1526 break; 1527 case O_SOCKARG: 1528 bprintf(bp, " sockarg"); 1529 break; 1530 case O_IN: 1531 bprintf(bp, cmd->len & F_NOT ? " out" : " in"); 1532 break; 1533 case O_DIVERTED: 1534 switch (cmd->arg1) { 1535 case 3: 1536 bprintf(bp, " diverted"); 1537 break; 1538 case 2: 1539 bprintf(bp, " diverted-output"); 1540 break; 1541 case 1: 1542 bprintf(bp, " diverted-loopback"); 1543 break; 1544 default: 1545 bprintf(bp, " diverted-?<%u>", cmd->arg1); 1546 break; 1547 } 1548 break; 1549 case O_LAYER2: 1550 bprintf(bp, " layer2"); 1551 break; 1552 case O_XMIT: 1553 case O_RECV: 1554 case O_VIA: 1555 if (cmd->opcode == O_XMIT) 1556 s = "xmit"; 1557 else if (cmd->opcode == O_RECV) 1558 s = "recv"; 1559 else /* if (cmd->opcode == O_VIA) */ 1560 s = "via"; 1561 switch (insntod(cmd, if)->name[0]) { 1562 case '\0': 1563 bprintf(bp, " %s %s", s, 1564 inet_ntoa(insntod(cmd, if)->p.ip)); 1565 break; 1566 case '\1': 1567 bprintf(bp, " %s table(%s)", s, 1568 table_search_ctlv(fo->tstate, 1569 insntod(cmd, if)->p.kidx)); 1570 break; 1571 default: 1572 bprintf(bp, " %s %s", s, 1573 insntod(cmd, if)->name); 1574 } 1575 break; 1576 case O_IP_FLOW_LOOKUP: 1577 s = table_search_ctlv(fo->tstate, cmd->arg1); 1578 bprintf(bp, " flow table(%s", s); 1579 if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_u32)) 1580 bprintf(bp, ",%u", insntod(cmd, u32)->d[0]); 1581 bprintf(bp, ")"); 1582 break; 1583 case O_IPID: 1584 case O_IPTTL: 1585 case O_IPLEN: 1586 case O_TCPDATALEN: 1587 case O_TCPWIN: 1588 if (F_LEN(cmd) == 1) { 1589 switch (cmd->opcode) { 1590 case O_IPID: 1591 s = "ipid"; 1592 break; 1593 case O_IPTTL: 1594 s = "ipttl"; 1595 break; 1596 case O_IPLEN: 1597 s = "iplen"; 1598 break; 1599 case O_TCPDATALEN: 1600 s = "tcpdatalen"; 1601 break; 1602 case O_TCPWIN: 1603 s = "tcpwin"; 1604 break; 1605 } 1606 bprintf(bp, " %s %u", s, cmd->arg1); 1607 } else 1608 print_newports(bp, insntod(cmd, u16), 0, 1609 cmd->opcode); 1610 break; 1611 case O_IPVER: 1612 bprintf(bp, " ipver %u", cmd->arg1); 1613 break; 1614 case O_IPPRECEDENCE: 1615 bprintf(bp, " ipprecedence %u", cmd->arg1 >> 5); 1616 break; 1617 case O_DSCP: 1618 print_dscp(bp, insntod(cmd, u32)); 1619 break; 1620 case O_IPOPT: 1621 print_flags(bp, "ipoptions", cmd, f_ipopts); 1622 break; 1623 case O_IPTOS: 1624 print_flags(bp, "iptos", cmd, f_iptos); 1625 break; 1626 case O_ICMPTYPE: 1627 print_icmptypes(bp, insntod(cmd, u32)); 1628 break; 1629 case O_ESTAB: 1630 bprintf(bp, " established"); 1631 break; 1632 case O_TCPFLAGS: 1633 print_flags(bp, "tcpflags", cmd, f_tcpflags); 1634 break; 1635 case O_TCPOPTS: 1636 print_flags(bp, "tcpoptions", cmd, f_tcpopts); 1637 break; 1638 case O_TCPACK: 1639 bprintf(bp, " tcpack %d", 1640 ntohl(insntod(cmd, u32)->d[0])); 1641 break; 1642 case O_TCPSEQ: 1643 bprintf(bp, " tcpseq %d", 1644 ntohl(insntod(cmd, u32)->d[0])); 1645 break; 1646 case O_UID: 1647 pwd = getpwuid(insntod(cmd, u32)->d[0]); 1648 if (pwd != NULL) 1649 bprintf(bp, " uid %s", pwd->pw_name); 1650 else 1651 bprintf(bp, " uid %u", 1652 insntod(cmd, u32)->d[0]); 1653 break; 1654 case O_GID: 1655 grp = getgrgid(insntod(cmd, u32)->d[0]); 1656 if (grp != NULL) 1657 bprintf(bp, " gid %s", grp->gr_name); 1658 else 1659 bprintf(bp, " gid %u", 1660 insntod(cmd, u32)->d[0]); 1661 break; 1662 case O_JAIL: 1663 bprintf(bp, " jail %d", insntod(cmd, u32)->d[0]); 1664 break; 1665 case O_VERREVPATH: 1666 bprintf(bp, " verrevpath"); 1667 break; 1668 case O_VERSRCREACH: 1669 bprintf(bp, " versrcreach"); 1670 break; 1671 case O_ANTISPOOF: 1672 bprintf(bp, " antispoof"); 1673 break; 1674 case O_IPSEC: 1675 bprintf(bp, " ipsec"); 1676 break; 1677 case O_NOP: 1678 bprintf(bp, " // %s", (char *)(cmd + 1)); 1679 break; 1680 case O_KEEP_STATE: 1681 if (state->flags & HAVE_PROBE_STATE) 1682 bprintf(bp, " keep-state"); 1683 else 1684 bprintf(bp, " record-state"); 1685 bprintf(bp, " :%s", 1686 object_search_ctlv(fo->tstate, cmd->arg1, 1687 IPFW_TLV_STATE_NAME)); 1688 break; 1689 case O_LIMIT: 1690 if (state->flags & HAVE_PROBE_STATE) 1691 bprintf(bp, " limit"); 1692 else 1693 bprintf(bp, " set-limit"); 1694 print_limit_mask(bp, insntod(cmd, limit)); 1695 bprintf(bp, " :%s", 1696 object_search_ctlv(fo->tstate, cmd->arg1, 1697 IPFW_TLV_STATE_NAME)); 1698 break; 1699 case O_IP6: 1700 bprintf(bp, " ip6"); 1701 break; 1702 case O_IP4: 1703 bprintf(bp, " ip4"); 1704 break; 1705 case O_ICMP6TYPE: 1706 print_icmp6types(bp, insntod(cmd, u32)); 1707 break; 1708 case O_EXT_HDR: 1709 print_ext6hdr(bp, cmd); 1710 break; 1711 case O_TAGGED: 1712 if (F_LEN(cmd) == 1) 1713 bprint_uint_arg(bp, " tagged ", cmd->arg1); 1714 else 1715 print_newports(bp, insntod(cmd, u16), 1716 0, O_TAGGED); 1717 break; 1718 case O_SKIP_ACTION: 1719 bprintf(bp, " defer-immediate-action"); 1720 break; 1721 default: 1722 bprintf(bp, " [opcode %d len %d]", cmd->opcode, 1723 cmd->len); 1724 } 1725 if (cmd->len & F_OR) { 1726 bprintf(bp, " or"); 1727 state->or_block = 1; 1728 } else if (state->or_block != 0) { 1729 bprintf(bp, " }"); 1730 state->or_block = 0; 1731 } 1732 mark_printed(state, cmd); 1733 1734 return (1); 1735 } 1736 1737 static ipfw_insn * 1738 print_opcode(struct buf_pr *bp, struct format_opts *fo, 1739 struct show_state *state, int opcode) 1740 { 1741 ipfw_insn *cmd; 1742 int l; 1743 1744 for (l = state->rule->act_ofs, cmd = state->rule->cmd; 1745 l > 0; l -= F_LEN(cmd), cmd += F_LEN(cmd)) { 1746 /* We use zero opcode to print the rest of options */ 1747 if (opcode >= 0 && cmd->opcode != opcode) 1748 continue; 1749 /* 1750 * Skip O_NOP, when we printing the rest 1751 * of options, it will be handled separately. 1752 */ 1753 if (cmd->opcode == O_NOP && opcode != O_NOP) 1754 continue; 1755 if (!print_instruction(bp, fo, state, cmd)) 1756 continue; 1757 return (cmd); 1758 } 1759 return (NULL); 1760 } 1761 1762 static void 1763 print_fwd(struct buf_pr *bp, const ipfw_insn *cmd) 1764 { 1765 char buf[INET6_ADDRSTRLEN + IF_NAMESIZE + 2]; 1766 ipfw_insn_sa6 *sa6; 1767 ipfw_insn_sa *sa; 1768 uint16_t port; 1769 1770 if (cmd->opcode == O_FORWARD_IP) { 1771 sa = insntod(cmd, sa); 1772 port = sa->sa.sin_port; 1773 if (sa->sa.sin_addr.s_addr == INADDR_ANY) 1774 bprintf(bp, "fwd tablearg"); 1775 else 1776 bprintf(bp, "fwd %s", inet_ntoa(sa->sa.sin_addr)); 1777 } else { 1778 sa6 = insntod(cmd, sa6); 1779 port = sa6->sa.sin6_port; 1780 bprintf(bp, "fwd "); 1781 if (getnameinfo((const struct sockaddr *)&sa6->sa, 1782 sizeof(struct sockaddr_in6), buf, sizeof(buf), NULL, 0, 1783 NI_NUMERICHOST) == 0) 1784 bprintf(bp, "%s", buf); 1785 } 1786 if (port != 0) 1787 bprintf(bp, ",%u", port); 1788 } 1789 1790 static int 1791 print_action_instruction(struct buf_pr *bp, const struct format_opts *fo, 1792 struct show_state *state, const ipfw_insn *cmd) 1793 { 1794 const char *s; 1795 1796 if (is_printed_opcode(state, cmd)) 1797 return (0); 1798 switch (cmd->opcode) { 1799 case O_CHECK_STATE: 1800 bprintf(bp, "check-state"); 1801 if (cmd->arg1 != 0) 1802 s = object_search_ctlv(fo->tstate, cmd->arg1, 1803 IPFW_TLV_STATE_NAME); 1804 else 1805 s = NULL; 1806 bprintf(bp, " :%s", s ? s: "any"); 1807 break; 1808 case O_ACCEPT: 1809 bprintf(bp, "allow"); 1810 break; 1811 case O_COUNT: 1812 bprintf(bp, "count"); 1813 break; 1814 case O_DENY: 1815 bprintf(bp, "deny"); 1816 break; 1817 case O_REJECT: 1818 if (cmd->arg1 == ICMP_REJECT_RST) 1819 bprintf(bp, "reset"); 1820 else if (cmd->arg1 == ICMP_REJECT_ABORT) 1821 bprintf(bp, "abort"); 1822 else if (cmd->arg1 == ICMP_UNREACH_HOST) 1823 bprintf(bp, "reject"); 1824 else 1825 print_reject_code(bp, cmd->arg1); 1826 break; 1827 case O_UNREACH6: 1828 if (cmd->arg1 == ICMP6_UNREACH_RST) 1829 bprintf(bp, "reset6"); 1830 else if (cmd->arg1 == ICMP6_UNREACH_ABORT) 1831 bprintf(bp, "abort6"); 1832 else 1833 print_unreach6_code(bp, cmd->arg1); 1834 break; 1835 case O_SKIPTO: 1836 bprint_uint_arg(bp, "skipto ", cmd->arg1); 1837 break; 1838 case O_PIPE: 1839 bprint_uint_arg(bp, "pipe ", cmd->arg1); 1840 break; 1841 case O_QUEUE: 1842 bprint_uint_arg(bp, "queue ", cmd->arg1); 1843 break; 1844 case O_DIVERT: 1845 bprint_uint_arg(bp, "divert ", cmd->arg1); 1846 break; 1847 case O_TEE: 1848 bprint_uint_arg(bp, "tee ", cmd->arg1); 1849 break; 1850 case O_NETGRAPH: 1851 bprint_uint_arg(bp, "netgraph ", cmd->arg1); 1852 break; 1853 case O_NGTEE: 1854 bprint_uint_arg(bp, "ngtee ", cmd->arg1); 1855 break; 1856 case O_FORWARD_IP: 1857 case O_FORWARD_IP6: 1858 print_fwd(bp, cmd); 1859 break; 1860 case O_LOG: 1861 if (insntod(cmd, log)->max_log > 0) 1862 bprintf(bp, " log logamount %d", 1863 insntod(cmd, log)->max_log); 1864 else 1865 bprintf(bp, " log"); 1866 break; 1867 case O_ALTQ: 1868 #ifndef NO_ALTQ 1869 print_altq_cmd(bp, insntod(cmd, altq)); 1870 #endif 1871 break; 1872 case O_TAG: 1873 bprint_uint_arg(bp, cmd->len & F_NOT ? " untag ": 1874 " tag ", cmd->arg1); 1875 break; 1876 case O_NAT: 1877 if (cmd->arg1 != IP_FW_NAT44_GLOBAL) 1878 bprint_uint_arg(bp, "nat ", cmd->arg1); 1879 else 1880 bprintf(bp, "nat global"); 1881 break; 1882 case O_SETFIB: 1883 if (cmd->arg1 == IP_FW_TARG) 1884 bprint_uint_arg(bp, "setfib ", cmd->arg1); 1885 else 1886 bprintf(bp, "setfib %u", cmd->arg1 & 0x7FFF); 1887 break; 1888 case O_EXTERNAL_ACTION: 1889 /* 1890 * The external action can consists of two following 1891 * each other opcodes - O_EXTERNAL_ACTION and 1892 * O_EXTERNAL_INSTANCE. The first contains the ID of 1893 * name of external action. The second contains the ID 1894 * of name of external action instance. 1895 * NOTE: in case when external action has no named 1896 * instances support, the second opcode isn't needed. 1897 */ 1898 state->eaction = cmd; 1899 s = object_search_ctlv(fo->tstate, cmd->arg1, 1900 IPFW_TLV_EACTION); 1901 if (match_token(rule_eactions, s) != -1) 1902 bprintf(bp, "%s", s); 1903 else 1904 bprintf(bp, "eaction %s", s); 1905 break; 1906 case O_EXTERNAL_INSTANCE: 1907 if (state->eaction == NULL) 1908 break; 1909 /* 1910 * XXX: we need to teach ipfw(9) to rewrite opcodes 1911 * in the user buffer on rule addition. When we add 1912 * the rule, we specify zero TLV type for 1913 * O_EXTERNAL_INSTANCE object. To show correct 1914 * rule after `ipfw add` we need to search instance 1915 * name with zero type. But when we do `ipfw show` 1916 * we calculate TLV type using IPFW_TLV_EACTION_NAME() 1917 * macro. 1918 */ 1919 s = object_search_ctlv(fo->tstate, cmd->arg1, 0); 1920 if (s == NULL) 1921 s = object_search_ctlv(fo->tstate, 1922 cmd->arg1, IPFW_TLV_EACTION_NAME( 1923 state->eaction->arg1)); 1924 bprintf(bp, " %s", s); 1925 break; 1926 case O_EXTERNAL_DATA: 1927 if (state->eaction == NULL) 1928 break; 1929 /* 1930 * Currently we support data formatting only for 1931 * external data with datalen u16. For unknown data 1932 * print its size in bytes. 1933 */ 1934 if (cmd->len == F_INSN_SIZE(ipfw_insn)) 1935 bprintf(bp, " %u", cmd->arg1); 1936 else 1937 bprintf(bp, " %ubytes", 1938 cmd->len * sizeof(uint32_t)); 1939 break; 1940 case O_SETDSCP: 1941 if (cmd->arg1 == IP_FW_TARG) { 1942 bprintf(bp, "setdscp tablearg"); 1943 break; 1944 } 1945 s = match_value(f_ipdscp, cmd->arg1 & 0x3F); 1946 if (s != NULL) 1947 bprintf(bp, "setdscp %s", s); 1948 else 1949 bprintf(bp, "setdscp %s", cmd->arg1 & 0x3F); 1950 break; 1951 case O_REASS: 1952 bprintf(bp, "reass"); 1953 break; 1954 case O_CALLRETURN: 1955 if (cmd->len & F_NOT) 1956 bprintf(bp, "return"); 1957 else 1958 bprint_uint_arg(bp, "call ", cmd->arg1); 1959 break; 1960 default: 1961 bprintf(bp, "** unrecognized action %d len %d ", 1962 cmd->opcode, cmd->len); 1963 } 1964 mark_printed(state, cmd); 1965 1966 return (1); 1967 } 1968 1969 1970 static ipfw_insn * 1971 print_action(struct buf_pr *bp, struct format_opts *fo, 1972 struct show_state *state, uint8_t opcode) 1973 { 1974 ipfw_insn *cmd; 1975 int l; 1976 1977 for (l = state->rule->cmd_len - state->rule->act_ofs, 1978 cmd = ACTION_PTR(state->rule); l > 0; 1979 l -= F_LEN(cmd), cmd += F_LEN(cmd)) { 1980 if (cmd->opcode != opcode) 1981 continue; 1982 if (!print_action_instruction(bp, fo, state, cmd)) 1983 continue; 1984 return (cmd); 1985 } 1986 return (NULL); 1987 } 1988 1989 static void 1990 print_proto(struct buf_pr *bp, struct format_opts *fo, 1991 struct show_state *state) 1992 { 1993 ipfw_insn *cmd; 1994 int l, proto, ip4, ip6, tmp; 1995 1996 /* Count all O_PROTO, O_IP4, O_IP6 instructions. */ 1997 proto = tmp = ip4 = ip6 = 0; 1998 for (l = state->rule->act_ofs, cmd = state->rule->cmd; 1999 l > 0; l -= F_LEN(cmd), cmd += F_LEN(cmd)) { 2000 switch (cmd->opcode) { 2001 case O_PROTO: 2002 proto++; 2003 break; 2004 case O_IP4: 2005 ip4 = 1; 2006 if (cmd->len & F_OR) 2007 ip4++; 2008 break; 2009 case O_IP6: 2010 ip6 = 1; 2011 if (cmd->len & F_OR) 2012 ip6++; 2013 break; 2014 default: 2015 continue; 2016 } 2017 } 2018 if (proto == 0 && ip4 == 0 && ip6 == 0) { 2019 state->proto = IPPROTO_IP; 2020 state->flags |= HAVE_PROTO; 2021 bprintf(bp, " ip"); 2022 return; 2023 } 2024 /* To handle the case { ip4 or ip6 }, print opcode with F_OR first */ 2025 cmd = NULL; 2026 if (ip4 || ip6) 2027 cmd = print_opcode(bp, fo, state, ip4 > ip6 ? O_IP4: O_IP6); 2028 if (cmd != NULL && (cmd->len & F_OR)) 2029 cmd = print_opcode(bp, fo, state, ip4 > ip6 ? O_IP6: O_IP4); 2030 if (cmd == NULL || (cmd->len & F_OR)) 2031 for (l = proto; l > 0; l--) { 2032 cmd = print_opcode(bp, fo, state, O_PROTO); 2033 if (cmd != NULL && (cmd->len & F_OR) == 0) 2034 break; 2035 tmp = cmd->arg1; 2036 } 2037 /* Initialize proto, it is used by print_newports() */ 2038 if (tmp != 0) 2039 state->proto = tmp; 2040 else if (ip6 != 0) 2041 state->proto = IPPROTO_IPV6; 2042 else 2043 state->proto = IPPROTO_IP; 2044 state->flags |= HAVE_PROTO; 2045 } 2046 2047 static int 2048 match_opcode(int opcode, const int opcodes[], size_t nops) 2049 { 2050 int i; 2051 2052 for (i = 0; i < nops; i++) 2053 if (opcode == opcodes[i]) 2054 return (1); 2055 return (0); 2056 } 2057 2058 static void 2059 print_address(struct buf_pr *bp, struct format_opts *fo, 2060 struct show_state *state, const int opcodes[], size_t nops, int portop, 2061 int flag) 2062 { 2063 ipfw_insn *cmd; 2064 int count, l, portcnt, pf; 2065 2066 count = portcnt = 0; 2067 for (l = state->rule->act_ofs, cmd = state->rule->cmd; 2068 l > 0; l -= F_LEN(cmd), cmd += F_LEN(cmd)) { 2069 if (match_opcode(cmd->opcode, opcodes, nops)) 2070 count++; 2071 else if (cmd->opcode == portop) 2072 portcnt++; 2073 } 2074 if (count == 0) 2075 bprintf(bp, " any"); 2076 for (l = state->rule->act_ofs, cmd = state->rule->cmd; 2077 l > 0 && count > 0; l -= F_LEN(cmd), cmd += F_LEN(cmd)) { 2078 if (!match_opcode(cmd->opcode, opcodes, nops)) 2079 continue; 2080 print_instruction(bp, fo, state, cmd); 2081 if ((cmd->len & F_OR) == 0) 2082 break; 2083 count--; 2084 } 2085 /* 2086 * If several O_IP_?PORT opcodes specified, leave them to the 2087 * options section. 2088 */ 2089 if (portcnt == 1) { 2090 for (l = state->rule->act_ofs, cmd = state->rule->cmd, pf = 0; 2091 l > 0; l -= F_LEN(cmd), cmd += F_LEN(cmd)) { 2092 if (cmd->opcode != portop) { 2093 pf = (cmd->len & F_OR); 2094 continue; 2095 } 2096 /* Print opcode iff it is not in OR block. */ 2097 if (pf == 0 && (cmd->len & F_OR) == 0) 2098 print_instruction(bp, fo, state, cmd); 2099 break; 2100 } 2101 } 2102 state->flags |= flag; 2103 } 2104 2105 static const int action_opcodes[] = { 2106 O_CHECK_STATE, O_ACCEPT, O_COUNT, O_DENY, O_REJECT, 2107 O_UNREACH6, O_SKIPTO, O_PIPE, O_QUEUE, O_DIVERT, O_TEE, 2108 O_NETGRAPH, O_NGTEE, O_FORWARD_IP, O_FORWARD_IP6, O_NAT, 2109 O_SETFIB, O_SETDSCP, O_REASS, O_CALLRETURN, 2110 /* keep the following opcodes at the end of the list */ 2111 O_EXTERNAL_ACTION, O_EXTERNAL_INSTANCE, O_EXTERNAL_DATA 2112 }; 2113 2114 static const int modifier_opcodes[] = { 2115 O_LOG, O_ALTQ, O_TAG 2116 }; 2117 2118 static const int src_opcodes[] = { 2119 O_IP_SRC, O_IP_SRC_LOOKUP, O_IP_SRC_MASK, O_IP_SRC_ME, 2120 O_IP_SRC_SET, O_IP6_SRC, O_IP6_SRC_MASK, O_IP6_SRC_ME 2121 }; 2122 2123 static const int dst_opcodes[] = { 2124 O_IP_DST, O_IP_DST_LOOKUP, O_IP_DST_MASK, O_IP_DST_ME, 2125 O_IP_DST_SET, O_IP6_DST, O_IP6_DST_MASK, O_IP6_DST_ME 2126 }; 2127 2128 static void 2129 show_static_rule(struct cmdline_opts *co, struct format_opts *fo, 2130 struct buf_pr *bp, struct ip_fw_rule *rule, struct ip_fw_bcounter *cntr) 2131 { 2132 struct show_state state; 2133 ipfw_insn *cmd; 2134 static int twidth = 0; 2135 int i; 2136 2137 /* Print # DISABLED or skip the rule */ 2138 if ((fo->set_mask & (1 << rule->set)) == 0) { 2139 /* disabled mask */ 2140 if (!co->show_sets) 2141 return; 2142 else 2143 bprintf(bp, "# DISABLED "); 2144 } 2145 if (init_show_state(&state, rule) != 0) { 2146 warn("init_show_state() failed"); 2147 return; 2148 } 2149 bprintf(bp, "%05u ", rule->rulenum); 2150 2151 /* Print counters if enabled */ 2152 if (fo->pcwidth > 0 || fo->bcwidth > 0) { 2153 pr_u64(bp, &cntr->pcnt, fo->pcwidth); 2154 pr_u64(bp, &cntr->bcnt, fo->bcwidth); 2155 } 2156 2157 /* Print timestamp */ 2158 if (co->do_time == TIMESTAMP_NUMERIC) 2159 bprintf(bp, "%10u ", cntr->timestamp); 2160 else if (co->do_time == TIMESTAMP_STRING) { 2161 char timestr[30]; 2162 time_t t = (time_t)0; 2163 2164 if (twidth == 0) { 2165 strcpy(timestr, ctime(&t)); 2166 *strchr(timestr, '\n') = '\0'; 2167 twidth = strlen(timestr); 2168 } 2169 if (cntr->timestamp > 0) { 2170 t = _long_to_time(cntr->timestamp); 2171 2172 strcpy(timestr, ctime(&t)); 2173 *strchr(timestr, '\n') = '\0'; 2174 bprintf(bp, "%s ", timestr); 2175 } else { 2176 bprintf(bp, "%*s", twidth, " "); 2177 } 2178 } 2179 2180 /* Print set number */ 2181 if (co->show_sets) 2182 bprintf(bp, "set %d ", rule->set); 2183 2184 /* Print the optional "match probability" */ 2185 cmd = print_opcode(bp, fo, &state, O_PROB); 2186 /* Print rule action */ 2187 for (i = 0; i < nitems(action_opcodes); i++) { 2188 cmd = print_action(bp, fo, &state, action_opcodes[i]); 2189 if (cmd == NULL) 2190 continue; 2191 /* Handle special cases */ 2192 switch (cmd->opcode) { 2193 case O_CHECK_STATE: 2194 goto end; 2195 case O_EXTERNAL_ACTION: 2196 case O_EXTERNAL_INSTANCE: 2197 /* External action can have several instructions */ 2198 continue; 2199 } 2200 break; 2201 } 2202 /* Print rule modifiers */ 2203 for (i = 0; i < nitems(modifier_opcodes); i++) 2204 print_action(bp, fo, &state, modifier_opcodes[i]); 2205 /* 2206 * Print rule body 2207 */ 2208 if (co->comment_only != 0) 2209 goto end; 2210 2211 if (rule->flags & IPFW_RULE_JUSTOPTS) { 2212 state.flags |= HAVE_PROTO | HAVE_SRCIP | HAVE_DSTIP; 2213 goto justopts; 2214 } 2215 2216 print_proto(bp, fo, &state); 2217 2218 /* Print source */ 2219 bprintf(bp, " from"); 2220 print_address(bp, fo, &state, src_opcodes, nitems(src_opcodes), 2221 O_IP_SRCPORT, HAVE_SRCIP); 2222 2223 /* Print destination */ 2224 bprintf(bp, " to"); 2225 print_address(bp, fo, &state, dst_opcodes, nitems(dst_opcodes), 2226 O_IP_DSTPORT, HAVE_DSTIP); 2227 2228 justopts: 2229 /* Print the rest of options */ 2230 while (print_opcode(bp, fo, &state, -1)) 2231 ; 2232 end: 2233 /* Print comment at the end */ 2234 cmd = print_opcode(bp, fo, &state, O_NOP); 2235 if (co->comment_only != 0 && cmd == NULL) 2236 bprintf(bp, " // ..."); 2237 bprintf(bp, "\n"); 2238 free_show_state(&state); 2239 } 2240 2241 static void 2242 show_dyn_state(struct cmdline_opts *co, struct format_opts *fo, 2243 struct buf_pr *bp, ipfw_dyn_rule *d) 2244 { 2245 struct protoent *pe; 2246 struct in_addr a; 2247 uint16_t rulenum; 2248 char buf[INET6_ADDRSTRLEN]; 2249 2250 if (!co->do_expired) { 2251 if (!d->expire && !(d->dyn_type == O_LIMIT_PARENT)) 2252 return; 2253 } 2254 bcopy(&d->rule, &rulenum, sizeof(rulenum)); 2255 bprintf(bp, "%05d", rulenum); 2256 if (fo->pcwidth > 0 || fo->bcwidth > 0) { 2257 bprintf(bp, " "); 2258 pr_u64(bp, &d->pcnt, fo->pcwidth); 2259 pr_u64(bp, &d->bcnt, fo->bcwidth); 2260 bprintf(bp, "(%ds)", d->expire); 2261 } 2262 switch (d->dyn_type) { 2263 case O_LIMIT_PARENT: 2264 bprintf(bp, " PARENT %d", d->count); 2265 break; 2266 case O_LIMIT: 2267 bprintf(bp, " LIMIT"); 2268 break; 2269 case O_KEEP_STATE: /* bidir, no mask */ 2270 bprintf(bp, " STATE"); 2271 break; 2272 } 2273 2274 if ((pe = getprotobynumber(d->id.proto)) != NULL) 2275 bprintf(bp, " %s", pe->p_name); 2276 else 2277 bprintf(bp, " proto %u", d->id.proto); 2278 2279 if (d->id.addr_type == 4) { 2280 a.s_addr = htonl(d->id.src_ip); 2281 bprintf(bp, " %s %d", inet_ntoa(a), d->id.src_port); 2282 2283 a.s_addr = htonl(d->id.dst_ip); 2284 bprintf(bp, " <-> %s %d", inet_ntoa(a), d->id.dst_port); 2285 } else if (d->id.addr_type == 6) { 2286 bprintf(bp, " %s %d", inet_ntop(AF_INET6, &d->id.src_ip6, buf, 2287 sizeof(buf)), d->id.src_port); 2288 bprintf(bp, " <-> %s %d", inet_ntop(AF_INET6, &d->id.dst_ip6, 2289 buf, sizeof(buf)), d->id.dst_port); 2290 } else 2291 bprintf(bp, " UNKNOWN <-> UNKNOWN"); 2292 if (d->kidx != 0) 2293 bprintf(bp, " :%s", object_search_ctlv(fo->tstate, 2294 d->kidx, IPFW_TLV_STATE_NAME)); 2295 } 2296 2297 static int 2298 do_range_cmd(int cmd, ipfw_range_tlv *rt) 2299 { 2300 ipfw_range_header rh; 2301 size_t sz; 2302 2303 memset(&rh, 0, sizeof(rh)); 2304 memcpy(&rh.range, rt, sizeof(*rt)); 2305 rh.range.head.length = sizeof(*rt); 2306 rh.range.head.type = IPFW_TLV_RANGE; 2307 sz = sizeof(rh); 2308 2309 if (do_get3(cmd, &rh.opheader, &sz) != 0) 2310 return (-1); 2311 /* Save number of matched objects */ 2312 rt->new_set = rh.range.new_set; 2313 return (0); 2314 } 2315 2316 /* 2317 * This one handles all set-related commands 2318 * ipfw set { show | enable | disable } 2319 * ipfw set swap X Y 2320 * ipfw set move X to Y 2321 * ipfw set move rule X to Y 2322 */ 2323 void 2324 ipfw_sets_handler(char *av[]) 2325 { 2326 ipfw_range_tlv rt; 2327 char *msg; 2328 size_t size; 2329 uint32_t masks[2]; 2330 int i; 2331 uint16_t rulenum; 2332 uint8_t cmd; 2333 2334 av++; 2335 memset(&rt, 0, sizeof(rt)); 2336 2337 if (av[0] == NULL) 2338 errx(EX_USAGE, "set needs command"); 2339 if (_substrcmp(*av, "show") == 0) { 2340 struct format_opts fo; 2341 ipfw_cfg_lheader *cfg; 2342 2343 memset(&fo, 0, sizeof(fo)); 2344 if (ipfw_get_config(&co, &fo, &cfg, &size) != 0) 2345 err(EX_OSERR, "requesting config failed"); 2346 2347 for (i = 0, msg = "disable"; i < RESVD_SET; i++) 2348 if ((cfg->set_mask & (1<<i)) == 0) { 2349 printf("%s %d", msg, i); 2350 msg = ""; 2351 } 2352 msg = (cfg->set_mask != (uint32_t)-1) ? " enable" : "enable"; 2353 for (i = 0; i < RESVD_SET; i++) 2354 if ((cfg->set_mask & (1<<i)) != 0) { 2355 printf("%s %d", msg, i); 2356 msg = ""; 2357 } 2358 printf("\n"); 2359 free(cfg); 2360 } else if (_substrcmp(*av, "swap") == 0) { 2361 av++; 2362 if ( av[0] == NULL || av[1] == NULL ) 2363 errx(EX_USAGE, "set swap needs 2 set numbers\n"); 2364 rt.set = atoi(av[0]); 2365 rt.new_set = atoi(av[1]); 2366 if (!isdigit(*(av[0])) || rt.set > RESVD_SET) 2367 errx(EX_DATAERR, "invalid set number %s\n", av[0]); 2368 if (!isdigit(*(av[1])) || rt.new_set > RESVD_SET) 2369 errx(EX_DATAERR, "invalid set number %s\n", av[1]); 2370 i = do_range_cmd(IP_FW_SET_SWAP, &rt); 2371 } else if (_substrcmp(*av, "move") == 0) { 2372 av++; 2373 if (av[0] && _substrcmp(*av, "rule") == 0) { 2374 rt.flags = IPFW_RCFLAG_RANGE; /* move rules to new set */ 2375 cmd = IP_FW_XMOVE; 2376 av++; 2377 } else 2378 cmd = IP_FW_SET_MOVE; /* Move set to new one */ 2379 if (av[0] == NULL || av[1] == NULL || av[2] == NULL || 2380 av[3] != NULL || _substrcmp(av[1], "to") != 0) 2381 errx(EX_USAGE, "syntax: set move [rule] X to Y\n"); 2382 rulenum = atoi(av[0]); 2383 rt.new_set = atoi(av[2]); 2384 if (cmd == IP_FW_XMOVE) { 2385 rt.start_rule = rulenum; 2386 rt.end_rule = rulenum; 2387 } else 2388 rt.set = rulenum; 2389 rt.new_set = atoi(av[2]); 2390 if (!isdigit(*(av[0])) || (cmd == 3 && rt.set > RESVD_SET) || 2391 (cmd == 2 && rt.start_rule == IPFW_DEFAULT_RULE) ) 2392 errx(EX_DATAERR, "invalid source number %s\n", av[0]); 2393 if (!isdigit(*(av[2])) || rt.new_set > RESVD_SET) 2394 errx(EX_DATAERR, "invalid dest. set %s\n", av[1]); 2395 i = do_range_cmd(cmd, &rt); 2396 if (i < 0) 2397 err(EX_OSERR, "failed to move %s", 2398 cmd == IP_FW_SET_MOVE ? "set": "rule"); 2399 } else if (_substrcmp(*av, "disable") == 0 || 2400 _substrcmp(*av, "enable") == 0 ) { 2401 int which = _substrcmp(*av, "enable") == 0 ? 1 : 0; 2402 2403 av++; 2404 masks[0] = masks[1] = 0; 2405 2406 while (av[0]) { 2407 if (isdigit(**av)) { 2408 i = atoi(*av); 2409 if (i < 0 || i > RESVD_SET) 2410 errx(EX_DATAERR, 2411 "invalid set number %d\n", i); 2412 masks[which] |= (1<<i); 2413 } else if (_substrcmp(*av, "disable") == 0) 2414 which = 0; 2415 else if (_substrcmp(*av, "enable") == 0) 2416 which = 1; 2417 else 2418 errx(EX_DATAERR, 2419 "invalid set command %s\n", *av); 2420 av++; 2421 } 2422 if ( (masks[0] & masks[1]) != 0 ) 2423 errx(EX_DATAERR, 2424 "cannot enable and disable the same set\n"); 2425 2426 rt.set = masks[0]; 2427 rt.new_set = masks[1]; 2428 i = do_range_cmd(IP_FW_SET_ENABLE, &rt); 2429 if (i) 2430 warn("set enable/disable: setsockopt(IP_FW_SET_ENABLE)"); 2431 } else 2432 errx(EX_USAGE, "invalid set command %s\n", *av); 2433 } 2434 2435 void 2436 ipfw_sysctl_handler(char *av[], int which) 2437 { 2438 av++; 2439 2440 if (av[0] == NULL) { 2441 warnx("missing keyword to enable/disable\n"); 2442 } else if (_substrcmp(*av, "firewall") == 0) { 2443 sysctlbyname("net.inet.ip.fw.enable", NULL, 0, 2444 &which, sizeof(which)); 2445 sysctlbyname("net.inet6.ip6.fw.enable", NULL, 0, 2446 &which, sizeof(which)); 2447 } else if (_substrcmp(*av, "one_pass") == 0) { 2448 sysctlbyname("net.inet.ip.fw.one_pass", NULL, 0, 2449 &which, sizeof(which)); 2450 } else if (_substrcmp(*av, "debug") == 0) { 2451 sysctlbyname("net.inet.ip.fw.debug", NULL, 0, 2452 &which, sizeof(which)); 2453 } else if (_substrcmp(*av, "verbose") == 0) { 2454 sysctlbyname("net.inet.ip.fw.verbose", NULL, 0, 2455 &which, sizeof(which)); 2456 } else if (_substrcmp(*av, "dyn_keepalive") == 0) { 2457 sysctlbyname("net.inet.ip.fw.dyn_keepalive", NULL, 0, 2458 &which, sizeof(which)); 2459 #ifndef NO_ALTQ 2460 } else if (_substrcmp(*av, "altq") == 0) { 2461 altq_set_enabled(which); 2462 #endif 2463 } else { 2464 warnx("unrecognize enable/disable keyword: %s\n", *av); 2465 } 2466 } 2467 2468 typedef void state_cb(struct cmdline_opts *co, struct format_opts *fo, 2469 void *arg, void *state); 2470 2471 static void 2472 prepare_format_dyn(struct cmdline_opts *co, struct format_opts *fo, 2473 void *arg, void *_state) 2474 { 2475 ipfw_dyn_rule *d; 2476 int width; 2477 uint8_t set; 2478 2479 d = (ipfw_dyn_rule *)_state; 2480 /* Count _ALL_ states */ 2481 fo->dcnt++; 2482 2483 if (fo->show_counters == 0) 2484 return; 2485 2486 if (co->use_set) { 2487 /* skip states from another set */ 2488 bcopy((char *)&d->rule + sizeof(uint16_t), &set, 2489 sizeof(uint8_t)); 2490 if (set != co->use_set - 1) 2491 return; 2492 } 2493 2494 width = pr_u64(NULL, &d->pcnt, 0); 2495 if (width > fo->pcwidth) 2496 fo->pcwidth = width; 2497 2498 width = pr_u64(NULL, &d->bcnt, 0); 2499 if (width > fo->bcwidth) 2500 fo->bcwidth = width; 2501 } 2502 2503 static int 2504 foreach_state(struct cmdline_opts *co, struct format_opts *fo, 2505 caddr_t base, size_t sz, state_cb dyn_bc, void *dyn_arg) 2506 { 2507 int ttype; 2508 state_cb *fptr; 2509 void *farg; 2510 ipfw_obj_tlv *tlv; 2511 ipfw_obj_ctlv *ctlv; 2512 2513 fptr = NULL; 2514 ttype = 0; 2515 2516 while (sz > 0) { 2517 ctlv = (ipfw_obj_ctlv *)base; 2518 switch (ctlv->head.type) { 2519 case IPFW_TLV_DYNSTATE_LIST: 2520 base += sizeof(*ctlv); 2521 sz -= sizeof(*ctlv); 2522 ttype = IPFW_TLV_DYN_ENT; 2523 fptr = dyn_bc; 2524 farg = dyn_arg; 2525 break; 2526 default: 2527 return (sz); 2528 } 2529 2530 while (sz > 0) { 2531 tlv = (ipfw_obj_tlv *)base; 2532 if (tlv->type != ttype) 2533 break; 2534 2535 fptr(co, fo, farg, tlv + 1); 2536 sz -= tlv->length; 2537 base += tlv->length; 2538 } 2539 } 2540 2541 return (sz); 2542 } 2543 2544 static void 2545 prepare_format_opts(struct cmdline_opts *co, struct format_opts *fo, 2546 ipfw_obj_tlv *rtlv, int rcnt, caddr_t dynbase, size_t dynsz) 2547 { 2548 int bcwidth, pcwidth, width; 2549 int n; 2550 struct ip_fw_bcounter *cntr; 2551 struct ip_fw_rule *r; 2552 2553 bcwidth = 0; 2554 pcwidth = 0; 2555 if (fo->show_counters != 0) { 2556 for (n = 0; n < rcnt; n++, 2557 rtlv = (ipfw_obj_tlv *)((caddr_t)rtlv + rtlv->length)) { 2558 cntr = (struct ip_fw_bcounter *)(rtlv + 1); 2559 r = (struct ip_fw_rule *)((caddr_t)cntr + cntr->size); 2560 /* skip rules from another set */ 2561 if (co->use_set && r->set != co->use_set - 1) 2562 continue; 2563 2564 /* packet counter */ 2565 width = pr_u64(NULL, &cntr->pcnt, 0); 2566 if (width > pcwidth) 2567 pcwidth = width; 2568 2569 /* byte counter */ 2570 width = pr_u64(NULL, &cntr->bcnt, 0); 2571 if (width > bcwidth) 2572 bcwidth = width; 2573 } 2574 } 2575 fo->bcwidth = bcwidth; 2576 fo->pcwidth = pcwidth; 2577 2578 fo->dcnt = 0; 2579 if (co->do_dynamic && dynsz > 0) 2580 foreach_state(co, fo, dynbase, dynsz, prepare_format_dyn, NULL); 2581 } 2582 2583 static int 2584 list_static_range(struct cmdline_opts *co, struct format_opts *fo, 2585 struct buf_pr *bp, ipfw_obj_tlv *rtlv, int rcnt) 2586 { 2587 int n, seen; 2588 struct ip_fw_rule *r; 2589 struct ip_fw_bcounter *cntr; 2590 int c = 0; 2591 2592 for (n = seen = 0; n < rcnt; n++, 2593 rtlv = (ipfw_obj_tlv *)((caddr_t)rtlv + rtlv->length)) { 2594 2595 if ((fo->show_counters | fo->show_time) != 0) { 2596 cntr = (struct ip_fw_bcounter *)(rtlv + 1); 2597 r = (struct ip_fw_rule *)((caddr_t)cntr + cntr->size); 2598 } else { 2599 cntr = NULL; 2600 r = (struct ip_fw_rule *)(rtlv + 1); 2601 } 2602 if (r->rulenum > fo->last) 2603 break; 2604 if (co->use_set && r->set != co->use_set - 1) 2605 continue; 2606 if (r->rulenum >= fo->first && r->rulenum <= fo->last) { 2607 show_static_rule(co, fo, bp, r, cntr); 2608 printf("%s", bp->buf); 2609 c += rtlv->length; 2610 bp_flush(bp); 2611 seen++; 2612 } 2613 } 2614 2615 return (seen); 2616 } 2617 2618 static void 2619 list_dyn_state(struct cmdline_opts *co, struct format_opts *fo, 2620 void *_arg, void *_state) 2621 { 2622 uint16_t rulenum; 2623 uint8_t set; 2624 ipfw_dyn_rule *d; 2625 struct buf_pr *bp; 2626 2627 d = (ipfw_dyn_rule *)_state; 2628 bp = (struct buf_pr *)_arg; 2629 2630 bcopy(&d->rule, &rulenum, sizeof(rulenum)); 2631 if (rulenum > fo->last) 2632 return; 2633 if (co->use_set) { 2634 bcopy((char *)&d->rule + sizeof(uint16_t), 2635 &set, sizeof(uint8_t)); 2636 if (set != co->use_set - 1) 2637 return; 2638 } 2639 if (rulenum >= fo->first) { 2640 show_dyn_state(co, fo, bp, d); 2641 printf("%s\n", bp->buf); 2642 bp_flush(bp); 2643 } 2644 } 2645 2646 static int 2647 list_dyn_range(struct cmdline_opts *co, struct format_opts *fo, 2648 struct buf_pr *bp, caddr_t base, size_t sz) 2649 { 2650 2651 sz = foreach_state(co, fo, base, sz, list_dyn_state, bp); 2652 return (sz); 2653 } 2654 2655 void 2656 ipfw_list(int ac, char *av[], int show_counters) 2657 { 2658 ipfw_cfg_lheader *cfg; 2659 struct format_opts sfo; 2660 size_t sz; 2661 int error; 2662 int lac; 2663 char **lav; 2664 uint32_t rnum; 2665 char *endptr; 2666 2667 if (co.test_only) { 2668 fprintf(stderr, "Testing only, list disabled\n"); 2669 return; 2670 } 2671 if (co.do_pipe) { 2672 dummynet_list(ac, av, show_counters); 2673 return; 2674 } 2675 2676 ac--; 2677 av++; 2678 memset(&sfo, 0, sizeof(sfo)); 2679 2680 /* Determine rule range to request */ 2681 if (ac > 0) { 2682 for (lac = ac, lav = av; lac != 0; lac--) { 2683 rnum = strtoul(*lav++, &endptr, 10); 2684 if (sfo.first == 0 || rnum < sfo.first) 2685 sfo.first = rnum; 2686 2687 if (*endptr == '-') 2688 rnum = strtoul(endptr + 1, &endptr, 10); 2689 if (sfo.last == 0 || rnum > sfo.last) 2690 sfo.last = rnum; 2691 } 2692 } 2693 2694 /* get configuraion from kernel */ 2695 cfg = NULL; 2696 sfo.show_counters = show_counters; 2697 sfo.show_time = co.do_time; 2698 sfo.flags = IPFW_CFG_GET_STATIC; 2699 if (co.do_dynamic != 0) 2700 sfo.flags |= IPFW_CFG_GET_STATES; 2701 if ((sfo.show_counters | sfo.show_time) != 0) 2702 sfo.flags |= IPFW_CFG_GET_COUNTERS; 2703 if (ipfw_get_config(&co, &sfo, &cfg, &sz) != 0) 2704 err(EX_OSERR, "retrieving config failed"); 2705 2706 error = ipfw_show_config(&co, &sfo, cfg, sz, ac, av); 2707 2708 free(cfg); 2709 2710 if (error != EX_OK) 2711 exit(error); 2712 } 2713 2714 static int 2715 ipfw_show_config(struct cmdline_opts *co, struct format_opts *fo, 2716 ipfw_cfg_lheader *cfg, size_t sz, int ac, char *av[]) 2717 { 2718 caddr_t dynbase; 2719 size_t dynsz; 2720 int rcnt; 2721 int exitval = EX_OK; 2722 int lac; 2723 char **lav; 2724 char *endptr; 2725 size_t readsz; 2726 struct buf_pr bp; 2727 ipfw_obj_ctlv *ctlv, *tstate; 2728 ipfw_obj_tlv *rbase; 2729 2730 /* 2731 * Handle tablenames TLV first, if any 2732 */ 2733 tstate = NULL; 2734 rbase = NULL; 2735 dynbase = NULL; 2736 dynsz = 0; 2737 readsz = sizeof(*cfg); 2738 rcnt = 0; 2739 2740 fo->set_mask = cfg->set_mask; 2741 2742 ctlv = (ipfw_obj_ctlv *)(cfg + 1); 2743 2744 if (cfg->flags & IPFW_CFG_GET_STATIC) { 2745 /* We've requested static rules */ 2746 if (ctlv->head.type == IPFW_TLV_TBLNAME_LIST) { 2747 object_sort_ctlv(ctlv); 2748 fo->tstate = ctlv; 2749 readsz += ctlv->head.length; 2750 ctlv = (ipfw_obj_ctlv *)((caddr_t)ctlv + 2751 ctlv->head.length); 2752 } 2753 2754 if (ctlv->head.type == IPFW_TLV_RULE_LIST) { 2755 rbase = (ipfw_obj_tlv *)(ctlv + 1); 2756 rcnt = ctlv->count; 2757 readsz += ctlv->head.length; 2758 ctlv = (ipfw_obj_ctlv *)((caddr_t)ctlv + 2759 ctlv->head.length); 2760 } 2761 } 2762 2763 if ((cfg->flags & IPFW_CFG_GET_STATES) && (readsz != sz)) { 2764 /* We may have some dynamic states */ 2765 dynsz = sz - readsz; 2766 /* Skip empty header */ 2767 if (dynsz != sizeof(ipfw_obj_ctlv)) 2768 dynbase = (caddr_t)ctlv; 2769 else 2770 dynsz = 0; 2771 } 2772 2773 prepare_format_opts(co, fo, rbase, rcnt, dynbase, dynsz); 2774 bp_alloc(&bp, 4096); 2775 2776 /* if no rule numbers were specified, list all rules */ 2777 if (ac == 0) { 2778 fo->first = 0; 2779 fo->last = IPFW_DEFAULT_RULE; 2780 list_static_range(co, fo, &bp, rbase, rcnt); 2781 2782 if (co->do_dynamic && dynsz > 0) { 2783 printf("## Dynamic rules (%d %zu):\n", fo->dcnt, dynsz); 2784 list_dyn_range(co, fo, &bp, dynbase, dynsz); 2785 } 2786 2787 bp_free(&bp); 2788 return (EX_OK); 2789 } 2790 2791 /* display specific rules requested on command line */ 2792 for (lac = ac, lav = av; lac != 0; lac--) { 2793 /* convert command line rule # */ 2794 fo->last = fo->first = strtoul(*lav++, &endptr, 10); 2795 if (*endptr == '-') 2796 fo->last = strtoul(endptr + 1, &endptr, 10); 2797 if (*endptr) { 2798 exitval = EX_USAGE; 2799 warnx("invalid rule number: %s", *(lav - 1)); 2800 continue; 2801 } 2802 2803 if (list_static_range(co, fo, &bp, rbase, rcnt) == 0) { 2804 /* give precedence to other error(s) */ 2805 if (exitval == EX_OK) 2806 exitval = EX_UNAVAILABLE; 2807 if (fo->first == fo->last) 2808 warnx("rule %u does not exist", fo->first); 2809 else 2810 warnx("no rules in range %u-%u", 2811 fo->first, fo->last); 2812 } 2813 } 2814 2815 if (co->do_dynamic && dynsz > 0) { 2816 printf("## Dynamic rules:\n"); 2817 for (lac = ac, lav = av; lac != 0; lac--) { 2818 fo->last = fo->first = strtoul(*lav++, &endptr, 10); 2819 if (*endptr == '-') 2820 fo->last = strtoul(endptr+1, &endptr, 10); 2821 if (*endptr) 2822 /* already warned */ 2823 continue; 2824 list_dyn_range(co, fo, &bp, dynbase, dynsz); 2825 } 2826 } 2827 2828 bp_free(&bp); 2829 return (exitval); 2830 } 2831 2832 2833 /* 2834 * Retrieves current ipfw configuration of given type 2835 * and stores its pointer to @pcfg. 2836 * 2837 * Caller is responsible for freeing @pcfg. 2838 * 2839 * Returns 0 on success. 2840 */ 2841 2842 static int 2843 ipfw_get_config(struct cmdline_opts *co, struct format_opts *fo, 2844 ipfw_cfg_lheader **pcfg, size_t *psize) 2845 { 2846 ipfw_cfg_lheader *cfg; 2847 size_t sz; 2848 int i; 2849 2850 2851 if (co->test_only != 0) { 2852 fprintf(stderr, "Testing only, list disabled\n"); 2853 return (0); 2854 } 2855 2856 /* Start with some data size */ 2857 sz = 4096; 2858 cfg = NULL; 2859 2860 for (i = 0; i < 16; i++) { 2861 if (cfg != NULL) 2862 free(cfg); 2863 if ((cfg = calloc(1, sz)) == NULL) 2864 return (ENOMEM); 2865 2866 cfg->flags = fo->flags; 2867 cfg->start_rule = fo->first; 2868 cfg->end_rule = fo->last; 2869 2870 if (do_get3(IP_FW_XGET, &cfg->opheader, &sz) != 0) { 2871 if (errno != ENOMEM) { 2872 free(cfg); 2873 return (errno); 2874 } 2875 2876 /* Buffer size is not enough. Try to increase */ 2877 sz = sz * 2; 2878 if (sz < cfg->size) 2879 sz = cfg->size; 2880 continue; 2881 } 2882 2883 *pcfg = cfg; 2884 *psize = sz; 2885 return (0); 2886 } 2887 2888 free(cfg); 2889 return (ENOMEM); 2890 } 2891 2892 static int 2893 lookup_host (char *host, struct in_addr *ipaddr) 2894 { 2895 struct hostent *he; 2896 2897 if (!inet_aton(host, ipaddr)) { 2898 if ((he = gethostbyname(host)) == NULL) 2899 return(-1); 2900 *ipaddr = *(struct in_addr *)he->h_addr_list[0]; 2901 } 2902 return(0); 2903 } 2904 2905 struct tidx { 2906 ipfw_obj_ntlv *idx; 2907 uint32_t count; 2908 uint32_t size; 2909 uint16_t counter; 2910 uint8_t set; 2911 }; 2912 2913 int 2914 ipfw_check_object_name(const char *name) 2915 { 2916 int c, i, l; 2917 2918 /* 2919 * Check that name is null-terminated and contains 2920 * valid symbols only. Valid mask is: 2921 * [a-zA-Z0-9\-_\.]{1,63} 2922 */ 2923 l = strlen(name); 2924 if (l == 0 || l >= 64) 2925 return (EINVAL); 2926 for (i = 0; i < l; i++) { 2927 c = name[i]; 2928 if (isalpha(c) || isdigit(c) || c == '_' || 2929 c == '-' || c == '.') 2930 continue; 2931 return (EINVAL); 2932 } 2933 return (0); 2934 } 2935 2936 static char *default_state_name = "default"; 2937 static int 2938 state_check_name(const char *name) 2939 { 2940 2941 if (ipfw_check_object_name(name) != 0) 2942 return (EINVAL); 2943 if (strcmp(name, "any") == 0) 2944 return (EINVAL); 2945 return (0); 2946 } 2947 2948 static int 2949 eaction_check_name(const char *name) 2950 { 2951 2952 if (ipfw_check_object_name(name) != 0) 2953 return (EINVAL); 2954 /* Restrict some 'special' names */ 2955 if (match_token(rule_actions, name) != -1 && 2956 match_token(rule_action_params, name) != -1) 2957 return (EINVAL); 2958 return (0); 2959 } 2960 2961 static uint16_t 2962 pack_object(struct tidx *tstate, char *name, int otype) 2963 { 2964 int i; 2965 ipfw_obj_ntlv *ntlv; 2966 2967 for (i = 0; i < tstate->count; i++) { 2968 if (strcmp(tstate->idx[i].name, name) != 0) 2969 continue; 2970 if (tstate->idx[i].set != tstate->set) 2971 continue; 2972 if (tstate->idx[i].head.type != otype) 2973 continue; 2974 2975 return (tstate->idx[i].idx); 2976 } 2977 2978 if (tstate->count + 1 > tstate->size) { 2979 tstate->size += 4; 2980 tstate->idx = realloc(tstate->idx, tstate->size * 2981 sizeof(ipfw_obj_ntlv)); 2982 if (tstate->idx == NULL) 2983 return (0); 2984 } 2985 2986 ntlv = &tstate->idx[i]; 2987 memset(ntlv, 0, sizeof(ipfw_obj_ntlv)); 2988 strlcpy(ntlv->name, name, sizeof(ntlv->name)); 2989 ntlv->head.type = otype; 2990 ntlv->head.length = sizeof(ipfw_obj_ntlv); 2991 ntlv->set = tstate->set; 2992 ntlv->idx = ++tstate->counter; 2993 tstate->count++; 2994 2995 return (ntlv->idx); 2996 } 2997 2998 static uint16_t 2999 pack_table(struct tidx *tstate, char *name) 3000 { 3001 3002 if (table_check_name(name) != 0) 3003 return (0); 3004 3005 return (pack_object(tstate, name, IPFW_TLV_TBL_NAME)); 3006 } 3007 3008 void 3009 fill_table(struct _ipfw_insn *cmd, char *av, uint8_t opcode, 3010 struct tidx *tstate) 3011 { 3012 uint32_t *d = ((ipfw_insn_u32 *)cmd)->d; 3013 uint16_t uidx; 3014 char *p; 3015 3016 if ((p = strchr(av + 6, ')')) == NULL) 3017 errx(EX_DATAERR, "forgotten parenthesis: '%s'", av); 3018 *p = '\0'; 3019 p = strchr(av + 6, ','); 3020 if (p) 3021 *p++ = '\0'; 3022 3023 if ((uidx = pack_table(tstate, av + 6)) == 0) 3024 errx(EX_DATAERR, "Invalid table name: %s", av + 6); 3025 3026 cmd->opcode = opcode; 3027 cmd->arg1 = uidx; 3028 if (p) { 3029 cmd->len |= F_INSN_SIZE(ipfw_insn_u32); 3030 d[0] = strtoul(p, NULL, 0); 3031 } else 3032 cmd->len |= F_INSN_SIZE(ipfw_insn); 3033 } 3034 3035 3036 /* 3037 * fills the addr and mask fields in the instruction as appropriate from av. 3038 * Update length as appropriate. 3039 * The following formats are allowed: 3040 * me returns O_IP_*_ME 3041 * 1.2.3.4 single IP address 3042 * 1.2.3.4:5.6.7.8 address:mask 3043 * 1.2.3.4/24 address/mask 3044 * 1.2.3.4/26{1,6,5,4,23} set of addresses in a subnet 3045 * We can have multiple comma-separated address/mask entries. 3046 */ 3047 static void 3048 fill_ip(ipfw_insn_ip *cmd, char *av, int cblen, struct tidx *tstate) 3049 { 3050 int len = 0; 3051 uint32_t *d = ((ipfw_insn_u32 *)cmd)->d; 3052 3053 cmd->o.len &= ~F_LEN_MASK; /* zero len */ 3054 3055 if (_substrcmp(av, "any") == 0) 3056 return; 3057 3058 if (_substrcmp(av, "me") == 0) { 3059 cmd->o.len |= F_INSN_SIZE(ipfw_insn); 3060 return; 3061 } 3062 3063 if (strncmp(av, "table(", 6) == 0) { 3064 fill_table(&cmd->o, av, O_IP_DST_LOOKUP, tstate); 3065 return; 3066 } 3067 3068 while (av) { 3069 /* 3070 * After the address we can have '/' or ':' indicating a mask, 3071 * ',' indicating another address follows, '{' indicating a 3072 * set of addresses of unspecified size. 3073 */ 3074 char *t = NULL, *p = strpbrk(av, "/:,{"); 3075 int masklen; 3076 char md, nd = '\0'; 3077 3078 CHECK_LENGTH(cblen, F_INSN_SIZE(ipfw_insn) + 2 + len); 3079 3080 if (p) { 3081 md = *p; 3082 *p++ = '\0'; 3083 if ((t = strpbrk(p, ",{")) != NULL) { 3084 nd = *t; 3085 *t = '\0'; 3086 } 3087 } else 3088 md = '\0'; 3089 3090 if (lookup_host(av, (struct in_addr *)&d[0]) != 0) 3091 errx(EX_NOHOST, "hostname ``%s'' unknown", av); 3092 switch (md) { 3093 case ':': 3094 if (!inet_aton(p, (struct in_addr *)&d[1])) 3095 errx(EX_DATAERR, "bad netmask ``%s''", p); 3096 break; 3097 case '/': 3098 masklen = atoi(p); 3099 if (masklen == 0) 3100 d[1] = htonl(0U); /* mask */ 3101 else if (masklen > 32) 3102 errx(EX_DATAERR, "bad width ``%s''", p); 3103 else 3104 d[1] = htonl(~0U << (32 - masklen)); 3105 break; 3106 case '{': /* no mask, assume /24 and put back the '{' */ 3107 d[1] = htonl(~0U << (32 - 24)); 3108 *(--p) = md; 3109 break; 3110 3111 case ',': /* single address plus continuation */ 3112 *(--p) = md; 3113 /* FALLTHROUGH */ 3114 case 0: /* initialization value */ 3115 default: 3116 d[1] = htonl(~0U); /* force /32 */ 3117 break; 3118 } 3119 d[0] &= d[1]; /* mask base address with mask */ 3120 if (t) 3121 *t = nd; 3122 /* find next separator */ 3123 if (p) 3124 p = strpbrk(p, ",{"); 3125 if (p && *p == '{') { 3126 /* 3127 * We have a set of addresses. They are stored as follows: 3128 * arg1 is the set size (powers of 2, 2..256) 3129 * addr is the base address IN HOST FORMAT 3130 * mask.. is an array of arg1 bits (rounded up to 3131 * the next multiple of 32) with bits set 3132 * for each host in the map. 3133 */ 3134 uint32_t *map = (uint32_t *)&cmd->mask; 3135 int low, high; 3136 int i = contigmask((uint8_t *)&(d[1]), 32); 3137 3138 if (len > 0) 3139 errx(EX_DATAERR, "address set cannot be in a list"); 3140 if (i < 24 || i > 31) 3141 errx(EX_DATAERR, "invalid set with mask %d\n", i); 3142 cmd->o.arg1 = 1<<(32-i); /* map length */ 3143 d[0] = ntohl(d[0]); /* base addr in host format */ 3144 cmd->o.opcode = O_IP_DST_SET; /* default */ 3145 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32) + (cmd->o.arg1+31)/32; 3146 for (i = 0; i < (cmd->o.arg1+31)/32 ; i++) 3147 map[i] = 0; /* clear map */ 3148 3149 av = p + 1; 3150 low = d[0] & 0xff; 3151 high = low + cmd->o.arg1 - 1; 3152 /* 3153 * Here, i stores the previous value when we specify a range 3154 * of addresses within a mask, e.g. 45-63. i = -1 means we 3155 * have no previous value. 3156 */ 3157 i = -1; /* previous value in a range */ 3158 while (isdigit(*av)) { 3159 char *s; 3160 int a = strtol(av, &s, 0); 3161 3162 if (s == av) { /* no parameter */ 3163 if (*av != '}') 3164 errx(EX_DATAERR, "set not closed\n"); 3165 if (i != -1) 3166 errx(EX_DATAERR, "incomplete range %d-", i); 3167 break; 3168 } 3169 if (a < low || a > high) 3170 errx(EX_DATAERR, "addr %d out of range [%d-%d]\n", 3171 a, low, high); 3172 a -= low; 3173 if (i == -1) /* no previous in range */ 3174 i = a; 3175 else { /* check that range is valid */ 3176 if (i > a) 3177 errx(EX_DATAERR, "invalid range %d-%d", 3178 i+low, a+low); 3179 if (*s == '-') 3180 errx(EX_DATAERR, "double '-' in range"); 3181 } 3182 for (; i <= a; i++) 3183 map[i/32] |= 1<<(i & 31); 3184 i = -1; 3185 if (*s == '-') 3186 i = a; 3187 else if (*s == '}') 3188 break; 3189 av = s+1; 3190 } 3191 return; 3192 } 3193 av = p; 3194 if (av) /* then *av must be a ',' */ 3195 av++; 3196 3197 /* Check this entry */ 3198 if (d[1] == 0) { /* "any", specified as x.x.x.x/0 */ 3199 /* 3200 * 'any' turns the entire list into a NOP. 3201 * 'not any' never matches, so it is removed from the 3202 * list unless it is the only item, in which case we 3203 * report an error. 3204 */ 3205 if (cmd->o.len & F_NOT) { /* "not any" never matches */ 3206 if (av == NULL && len == 0) /* only this entry */ 3207 errx(EX_DATAERR, "not any never matches"); 3208 } 3209 /* else do nothing and skip this entry */ 3210 return; 3211 } 3212 /* A single IP can be stored in an optimized format */ 3213 if (d[1] == (uint32_t)~0 && av == NULL && len == 0) { 3214 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32); 3215 return; 3216 } 3217 len += 2; /* two words... */ 3218 d += 2; 3219 } /* end while */ 3220 if (len + 1 > F_LEN_MASK) 3221 errx(EX_DATAERR, "address list too long"); 3222 cmd->o.len |= len+1; 3223 } 3224 3225 3226 /* n2mask sets n bits of the mask */ 3227 void 3228 n2mask(struct in6_addr *mask, int n) 3229 { 3230 static int minimask[9] = 3231 { 0x00, 0x80, 0xc0, 0xe0, 0xf0, 0xf8, 0xfc, 0xfe, 0xff }; 3232 u_char *p; 3233 3234 memset(mask, 0, sizeof(struct in6_addr)); 3235 p = (u_char *) mask; 3236 for (; n > 0; p++, n -= 8) { 3237 if (n >= 8) 3238 *p = 0xff; 3239 else 3240 *p = minimask[n]; 3241 } 3242 return; 3243 } 3244 3245 static void 3246 fill_flags_cmd(ipfw_insn *cmd, enum ipfw_opcodes opcode, 3247 struct _s_x *flags, char *p) 3248 { 3249 char *e; 3250 uint32_t set = 0, clear = 0; 3251 3252 if (fill_flags(flags, p, &e, &set, &clear) != 0) 3253 errx(EX_DATAERR, "invalid flag %s", e); 3254 3255 cmd->opcode = opcode; 3256 cmd->len = (cmd->len & (F_NOT | F_OR)) | 1; 3257 cmd->arg1 = (set & 0xff) | ( (clear & 0xff) << 8); 3258 } 3259 3260 3261 void 3262 ipfw_delete(char *av[]) 3263 { 3264 ipfw_range_tlv rt; 3265 char *sep; 3266 int i, j; 3267 int exitval = EX_OK; 3268 int do_set = 0; 3269 3270 av++; 3271 NEED1("missing rule specification"); 3272 if ( *av && _substrcmp(*av, "set") == 0) { 3273 /* Do not allow using the following syntax: 3274 * ipfw set N delete set M 3275 */ 3276 if (co.use_set) 3277 errx(EX_DATAERR, "invalid syntax"); 3278 do_set = 1; /* delete set */ 3279 av++; 3280 } 3281 3282 /* Rule number */ 3283 while (*av && isdigit(**av)) { 3284 i = strtol(*av, &sep, 10); 3285 j = i; 3286 if (*sep== '-') 3287 j = strtol(sep + 1, NULL, 10); 3288 av++; 3289 if (co.do_nat) { 3290 exitval = do_cmd(IP_FW_NAT_DEL, &i, sizeof i); 3291 if (exitval) { 3292 exitval = EX_UNAVAILABLE; 3293 if (co.do_quiet) 3294 continue; 3295 warn("nat %u not available", i); 3296 } 3297 } else if (co.do_pipe) { 3298 exitval = ipfw_delete_pipe(co.do_pipe, i); 3299 } else { 3300 memset(&rt, 0, sizeof(rt)); 3301 if (do_set != 0) { 3302 rt.set = i & 31; 3303 rt.flags = IPFW_RCFLAG_SET; 3304 } else { 3305 rt.start_rule = i & 0xffff; 3306 rt.end_rule = j & 0xffff; 3307 if (rt.start_rule == 0 && rt.end_rule == 0) 3308 rt.flags |= IPFW_RCFLAG_ALL; 3309 else 3310 rt.flags |= IPFW_RCFLAG_RANGE; 3311 if (co.use_set != 0) { 3312 rt.set = co.use_set - 1; 3313 rt.flags |= IPFW_RCFLAG_SET; 3314 } 3315 } 3316 i = do_range_cmd(IP_FW_XDEL, &rt); 3317 if (i != 0) { 3318 exitval = EX_UNAVAILABLE; 3319 if (co.do_quiet) 3320 continue; 3321 warn("rule %u: setsockopt(IP_FW_XDEL)", 3322 rt.start_rule); 3323 } else if (rt.new_set == 0 && do_set == 0) { 3324 exitval = EX_UNAVAILABLE; 3325 if (co.do_quiet) 3326 continue; 3327 if (rt.start_rule != rt.end_rule) 3328 warnx("no rules rules in %u-%u range", 3329 rt.start_rule, rt.end_rule); 3330 else 3331 warnx("rule %u not found", 3332 rt.start_rule); 3333 } 3334 } 3335 } 3336 if (exitval != EX_OK && co.do_force == 0) 3337 exit(exitval); 3338 } 3339 3340 3341 /* 3342 * fill the interface structure. We do not check the name as we can 3343 * create interfaces dynamically, so checking them at insert time 3344 * makes relatively little sense. 3345 * Interface names containing '*', '?', or '[' are assumed to be shell 3346 * patterns which match interfaces. 3347 */ 3348 static void 3349 fill_iface(ipfw_insn_if *cmd, char *arg, int cblen, struct tidx *tstate) 3350 { 3351 char *p; 3352 uint16_t uidx; 3353 3354 cmd->name[0] = '\0'; 3355 cmd->o.len |= F_INSN_SIZE(ipfw_insn_if); 3356 3357 CHECK_CMDLEN; 3358 3359 /* Parse the interface or address */ 3360 if (strcmp(arg, "any") == 0) 3361 cmd->o.len = 0; /* effectively ignore this command */ 3362 else if (strncmp(arg, "table(", 6) == 0) { 3363 if ((p = strchr(arg + 6, ')')) == NULL) 3364 errx(EX_DATAERR, "forgotten parenthesis: '%s'", arg); 3365 *p = '\0'; 3366 p = strchr(arg + 6, ','); 3367 if (p) 3368 *p++ = '\0'; 3369 if ((uidx = pack_table(tstate, arg + 6)) == 0) 3370 errx(EX_DATAERR, "Invalid table name: %s", arg + 6); 3371 3372 cmd->name[0] = '\1'; /* Special value indicating table */ 3373 cmd->p.kidx = uidx; 3374 } else if (!isdigit(*arg)) { 3375 strlcpy(cmd->name, arg, sizeof(cmd->name)); 3376 cmd->p.glob = strpbrk(arg, "*?[") != NULL ? 1 : 0; 3377 } else if (!inet_aton(arg, &cmd->p.ip)) 3378 errx(EX_DATAERR, "bad ip address ``%s''", arg); 3379 } 3380 3381 static void 3382 get_mac_addr_mask(const char *p, uint8_t *addr, uint8_t *mask) 3383 { 3384 int i; 3385 size_t l; 3386 char *ap, *ptr, *optr; 3387 struct ether_addr *mac; 3388 const char *macset = "0123456789abcdefABCDEF:"; 3389 3390 if (strcmp(p, "any") == 0) { 3391 for (i = 0; i < ETHER_ADDR_LEN; i++) 3392 addr[i] = mask[i] = 0; 3393 return; 3394 } 3395 3396 optr = ptr = strdup(p); 3397 if ((ap = strsep(&ptr, "&/")) != NULL && *ap != 0) { 3398 l = strlen(ap); 3399 if (strspn(ap, macset) != l || (mac = ether_aton(ap)) == NULL) 3400 errx(EX_DATAERR, "Incorrect MAC address"); 3401 bcopy(mac, addr, ETHER_ADDR_LEN); 3402 } else 3403 errx(EX_DATAERR, "Incorrect MAC address"); 3404 3405 if (ptr != NULL) { /* we have mask? */ 3406 if (p[ptr - optr - 1] == '/') { /* mask len */ 3407 long ml = strtol(ptr, &ap, 10); 3408 if (*ap != 0 || ml > ETHER_ADDR_LEN * 8 || ml < 0) 3409 errx(EX_DATAERR, "Incorrect mask length"); 3410 for (i = 0; ml > 0 && i < ETHER_ADDR_LEN; ml -= 8, i++) 3411 mask[i] = (ml >= 8) ? 0xff: (~0) << (8 - ml); 3412 } else { /* mask */ 3413 l = strlen(ptr); 3414 if (strspn(ptr, macset) != l || 3415 (mac = ether_aton(ptr)) == NULL) 3416 errx(EX_DATAERR, "Incorrect mask"); 3417 bcopy(mac, mask, ETHER_ADDR_LEN); 3418 } 3419 } else { /* default mask: ff:ff:ff:ff:ff:ff */ 3420 for (i = 0; i < ETHER_ADDR_LEN; i++) 3421 mask[i] = 0xff; 3422 } 3423 for (i = 0; i < ETHER_ADDR_LEN; i++) 3424 addr[i] &= mask[i]; 3425 3426 free(optr); 3427 } 3428 3429 /* 3430 * helper function, updates the pointer to cmd with the length 3431 * of the current command, and also cleans up the first word of 3432 * the new command in case it has been clobbered before. 3433 */ 3434 static ipfw_insn * 3435 next_cmd(ipfw_insn *cmd, int *len) 3436 { 3437 *len -= F_LEN(cmd); 3438 CHECK_LENGTH(*len, 0); 3439 cmd += F_LEN(cmd); 3440 bzero(cmd, sizeof(*cmd)); 3441 return cmd; 3442 } 3443 3444 /* 3445 * Takes arguments and copies them into a comment 3446 */ 3447 static void 3448 fill_comment(ipfw_insn *cmd, char **av, int cblen) 3449 { 3450 int i, l; 3451 char *p = (char *)(cmd + 1); 3452 3453 cmd->opcode = O_NOP; 3454 cmd->len = (cmd->len & (F_NOT | F_OR)); 3455 3456 /* Compute length of comment string. */ 3457 for (i = 0, l = 0; av[i] != NULL; i++) 3458 l += strlen(av[i]) + 1; 3459 if (l == 0) 3460 return; 3461 if (l > 84) 3462 errx(EX_DATAERR, 3463 "comment too long (max 80 chars)"); 3464 l = 1 + (l+3)/4; 3465 cmd->len = (cmd->len & (F_NOT | F_OR)) | l; 3466 CHECK_CMDLEN; 3467 3468 for (i = 0; av[i] != NULL; i++) { 3469 strcpy(p, av[i]); 3470 p += strlen(av[i]); 3471 *p++ = ' '; 3472 } 3473 *(--p) = '\0'; 3474 } 3475 3476 /* 3477 * A function to fill simple commands of size 1. 3478 * Existing flags are preserved. 3479 */ 3480 static void 3481 fill_cmd(ipfw_insn *cmd, enum ipfw_opcodes opcode, int flags, uint16_t arg) 3482 { 3483 cmd->opcode = opcode; 3484 cmd->len = ((cmd->len | flags) & (F_NOT | F_OR)) | 1; 3485 cmd->arg1 = arg; 3486 } 3487 3488 /* 3489 * Fetch and add the MAC address and type, with masks. This generates one or 3490 * two microinstructions, and returns the pointer to the last one. 3491 */ 3492 static ipfw_insn * 3493 add_mac(ipfw_insn *cmd, char *av[], int cblen) 3494 { 3495 ipfw_insn_mac *mac; 3496 3497 if ( ( av[0] == NULL ) || ( av[1] == NULL ) ) 3498 errx(EX_DATAERR, "MAC dst src"); 3499 3500 cmd->opcode = O_MACADDR2; 3501 cmd->len = (cmd->len & (F_NOT | F_OR)) | F_INSN_SIZE(ipfw_insn_mac); 3502 CHECK_CMDLEN; 3503 3504 mac = (ipfw_insn_mac *)cmd; 3505 get_mac_addr_mask(av[0], mac->addr, mac->mask); /* dst */ 3506 get_mac_addr_mask(av[1], &(mac->addr[ETHER_ADDR_LEN]), 3507 &(mac->mask[ETHER_ADDR_LEN])); /* src */ 3508 return cmd; 3509 } 3510 3511 static ipfw_insn * 3512 add_mactype(ipfw_insn *cmd, char *av, int cblen) 3513 { 3514 if (!av) 3515 errx(EX_DATAERR, "missing MAC type"); 3516 if (strcmp(av, "any") != 0) { /* we have a non-null type */ 3517 fill_newports((ipfw_insn_u16 *)cmd, av, IPPROTO_ETHERTYPE, 3518 cblen); 3519 cmd->opcode = O_MAC_TYPE; 3520 return cmd; 3521 } else 3522 return NULL; 3523 } 3524 3525 static ipfw_insn * 3526 add_proto0(ipfw_insn *cmd, char *av, u_char *protop) 3527 { 3528 struct protoent *pe; 3529 char *ep; 3530 int proto; 3531 3532 proto = strtol(av, &ep, 10); 3533 if (*ep != '\0' || proto <= 0) { 3534 if ((pe = getprotobyname(av)) == NULL) 3535 return NULL; 3536 proto = pe->p_proto; 3537 } 3538 3539 fill_cmd(cmd, O_PROTO, 0, proto); 3540 *protop = proto; 3541 return cmd; 3542 } 3543 3544 static ipfw_insn * 3545 add_proto(ipfw_insn *cmd, char *av, u_char *protop) 3546 { 3547 u_char proto = IPPROTO_IP; 3548 3549 if (_substrcmp(av, "all") == 0 || strcmp(av, "ip") == 0) 3550 ; /* do not set O_IP4 nor O_IP6 */ 3551 else if (strcmp(av, "ip4") == 0) 3552 /* explicit "just IPv4" rule */ 3553 fill_cmd(cmd, O_IP4, 0, 0); 3554 else if (strcmp(av, "ip6") == 0) { 3555 /* explicit "just IPv6" rule */ 3556 proto = IPPROTO_IPV6; 3557 fill_cmd(cmd, O_IP6, 0, 0); 3558 } else 3559 return add_proto0(cmd, av, protop); 3560 3561 *protop = proto; 3562 return cmd; 3563 } 3564 3565 static ipfw_insn * 3566 add_proto_compat(ipfw_insn *cmd, char *av, u_char *protop) 3567 { 3568 u_char proto = IPPROTO_IP; 3569 3570 if (_substrcmp(av, "all") == 0 || strcmp(av, "ip") == 0) 3571 ; /* do not set O_IP4 nor O_IP6 */ 3572 else if (strcmp(av, "ipv4") == 0 || strcmp(av, "ip4") == 0) 3573 /* explicit "just IPv4" rule */ 3574 fill_cmd(cmd, O_IP4, 0, 0); 3575 else if (strcmp(av, "ipv6") == 0 || strcmp(av, "ip6") == 0) { 3576 /* explicit "just IPv6" rule */ 3577 proto = IPPROTO_IPV6; 3578 fill_cmd(cmd, O_IP6, 0, 0); 3579 } else 3580 return add_proto0(cmd, av, protop); 3581 3582 *protop = proto; 3583 return cmd; 3584 } 3585 3586 static ipfw_insn * 3587 add_srcip(ipfw_insn *cmd, char *av, int cblen, struct tidx *tstate) 3588 { 3589 fill_ip((ipfw_insn_ip *)cmd, av, cblen, tstate); 3590 if (cmd->opcode == O_IP_DST_SET) /* set */ 3591 cmd->opcode = O_IP_SRC_SET; 3592 else if (cmd->opcode == O_IP_DST_LOOKUP) /* table */ 3593 cmd->opcode = O_IP_SRC_LOOKUP; 3594 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn)) /* me */ 3595 cmd->opcode = O_IP_SRC_ME; 3596 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_u32)) /* one IP */ 3597 cmd->opcode = O_IP_SRC; 3598 else /* addr/mask */ 3599 cmd->opcode = O_IP_SRC_MASK; 3600 return cmd; 3601 } 3602 3603 static ipfw_insn * 3604 add_dstip(ipfw_insn *cmd, char *av, int cblen, struct tidx *tstate) 3605 { 3606 fill_ip((ipfw_insn_ip *)cmd, av, cblen, tstate); 3607 if (cmd->opcode == O_IP_DST_SET) /* set */ 3608 ; 3609 else if (cmd->opcode == O_IP_DST_LOOKUP) /* table */ 3610 ; 3611 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn)) /* me */ 3612 cmd->opcode = O_IP_DST_ME; 3613 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_u32)) /* one IP */ 3614 cmd->opcode = O_IP_DST; 3615 else /* addr/mask */ 3616 cmd->opcode = O_IP_DST_MASK; 3617 return cmd; 3618 } 3619 3620 static struct _s_x f_reserved_keywords[] = { 3621 { "altq", TOK_OR }, 3622 { "//", TOK_OR }, 3623 { "diverted", TOK_OR }, 3624 { "dst-port", TOK_OR }, 3625 { "src-port", TOK_OR }, 3626 { "established", TOK_OR }, 3627 { "keep-state", TOK_OR }, 3628 { "frag", TOK_OR }, 3629 { "icmptypes", TOK_OR }, 3630 { "in", TOK_OR }, 3631 { "out", TOK_OR }, 3632 { "ip6", TOK_OR }, 3633 { "any", TOK_OR }, 3634 { "to", TOK_OR }, 3635 { "via", TOK_OR }, 3636 { "{", TOK_OR }, 3637 { NULL, 0 } /* terminator */ 3638 }; 3639 3640 static ipfw_insn * 3641 add_ports(ipfw_insn *cmd, char *av, u_char proto, int opcode, int cblen) 3642 { 3643 3644 if (match_token(f_reserved_keywords, av) != -1) 3645 return (NULL); 3646 3647 if (fill_newports((ipfw_insn_u16 *)cmd, av, proto, cblen)) { 3648 /* XXX todo: check that we have a protocol with ports */ 3649 cmd->opcode = opcode; 3650 return cmd; 3651 } 3652 return NULL; 3653 } 3654 3655 static ipfw_insn * 3656 add_src(ipfw_insn *cmd, char *av, u_char proto, int cblen, struct tidx *tstate) 3657 { 3658 struct in6_addr a; 3659 char *host, *ch, buf[INET6_ADDRSTRLEN]; 3660 ipfw_insn *ret = NULL; 3661 int len; 3662 3663 /* Copy first address in set if needed */ 3664 if ((ch = strpbrk(av, "/,")) != NULL) { 3665 len = ch - av; 3666 strlcpy(buf, av, sizeof(buf)); 3667 if (len < sizeof(buf)) 3668 buf[len] = '\0'; 3669 host = buf; 3670 } else 3671 host = av; 3672 3673 if (proto == IPPROTO_IPV6 || strcmp(av, "me6") == 0 || 3674 inet_pton(AF_INET6, host, &a) == 1) 3675 ret = add_srcip6(cmd, av, cblen, tstate); 3676 /* XXX: should check for IPv4, not !IPv6 */ 3677 if (ret == NULL && (proto == IPPROTO_IP || strcmp(av, "me") == 0 || 3678 inet_pton(AF_INET6, host, &a) != 1)) 3679 ret = add_srcip(cmd, av, cblen, tstate); 3680 if (ret == NULL && strcmp(av, "any") != 0) 3681 ret = cmd; 3682 3683 return ret; 3684 } 3685 3686 static ipfw_insn * 3687 add_dst(ipfw_insn *cmd, char *av, u_char proto, int cblen, struct tidx *tstate) 3688 { 3689 struct in6_addr a; 3690 char *host, *ch, buf[INET6_ADDRSTRLEN]; 3691 ipfw_insn *ret = NULL; 3692 int len; 3693 3694 /* Copy first address in set if needed */ 3695 if ((ch = strpbrk(av, "/,")) != NULL) { 3696 len = ch - av; 3697 strlcpy(buf, av, sizeof(buf)); 3698 if (len < sizeof(buf)) 3699 buf[len] = '\0'; 3700 host = buf; 3701 } else 3702 host = av; 3703 3704 if (proto == IPPROTO_IPV6 || strcmp(av, "me6") == 0 || 3705 inet_pton(AF_INET6, host, &a) == 1) 3706 ret = add_dstip6(cmd, av, cblen, tstate); 3707 /* XXX: should check for IPv4, not !IPv6 */ 3708 if (ret == NULL && (proto == IPPROTO_IP || strcmp(av, "me") == 0 || 3709 inet_pton(AF_INET6, host, &a) != 1)) 3710 ret = add_dstip(cmd, av, cblen, tstate); 3711 if (ret == NULL && strcmp(av, "any") != 0) 3712 ret = cmd; 3713 3714 return ret; 3715 } 3716 3717 /* 3718 * Parse arguments and assemble the microinstructions which make up a rule. 3719 * Rules are added into the 'rulebuf' and then copied in the correct order 3720 * into the actual rule. 3721 * 3722 * The syntax for a rule starts with the action, followed by 3723 * optional action parameters, and the various match patterns. 3724 * In the assembled microcode, the first opcode must be an O_PROBE_STATE 3725 * (generated if the rule includes a keep-state option), then the 3726 * various match patterns, log/altq actions, and the actual action. 3727 * 3728 */ 3729 void 3730 compile_rule(char *av[], uint32_t *rbuf, int *rbufsize, struct tidx *tstate) 3731 { 3732 /* 3733 * rules are added into the 'rulebuf' and then copied in 3734 * the correct order into the actual rule. 3735 * Some things that need to go out of order (prob, action etc.) 3736 * go into actbuf[]. 3737 */ 3738 static uint32_t actbuf[255], cmdbuf[255]; 3739 int rblen, ablen, cblen; 3740 3741 ipfw_insn *src, *dst, *cmd, *action, *prev=NULL; 3742 ipfw_insn *first_cmd; /* first match pattern */ 3743 3744 struct ip_fw_rule *rule; 3745 3746 /* 3747 * various flags used to record that we entered some fields. 3748 */ 3749 ipfw_insn *have_state = NULL; /* any state-related option */ 3750 int have_rstate = 0; 3751 ipfw_insn *have_log = NULL, *have_altq = NULL, *have_tag = NULL; 3752 ipfw_insn *have_skipcmd = NULL; 3753 size_t len; 3754 3755 int i; 3756 3757 int open_par = 0; /* open parenthesis ( */ 3758 3759 /* proto is here because it is used to fetch ports */ 3760 u_char proto = IPPROTO_IP; /* default protocol */ 3761 3762 double match_prob = 1; /* match probability, default is always match */ 3763 3764 bzero(actbuf, sizeof(actbuf)); /* actions go here */ 3765 bzero(cmdbuf, sizeof(cmdbuf)); 3766 bzero(rbuf, *rbufsize); 3767 3768 rule = (struct ip_fw_rule *)rbuf; 3769 cmd = (ipfw_insn *)cmdbuf; 3770 action = (ipfw_insn *)actbuf; 3771 3772 rblen = *rbufsize / sizeof(uint32_t); 3773 rblen -= sizeof(struct ip_fw_rule) / sizeof(uint32_t); 3774 ablen = sizeof(actbuf) / sizeof(actbuf[0]); 3775 cblen = sizeof(cmdbuf) / sizeof(cmdbuf[0]); 3776 cblen -= F_INSN_SIZE(ipfw_insn_u32) + 1; 3777 3778 #define CHECK_RBUFLEN(len) { CHECK_LENGTH(rblen, len); rblen -= len; } 3779 #define CHECK_ACTLEN CHECK_LENGTH(ablen, action->len) 3780 3781 av++; 3782 3783 /* [rule N] -- Rule number optional */ 3784 if (av[0] && isdigit(**av)) { 3785 rule->rulenum = atoi(*av); 3786 av++; 3787 } 3788 3789 /* [set N] -- set number (0..RESVD_SET), optional */ 3790 if (av[0] && av[1] && _substrcmp(*av, "set") == 0) { 3791 int set = strtoul(av[1], NULL, 10); 3792 if (set < 0 || set > RESVD_SET) 3793 errx(EX_DATAERR, "illegal set %s", av[1]); 3794 rule->set = set; 3795 tstate->set = set; 3796 av += 2; 3797 } 3798 3799 /* [prob D] -- match probability, optional */ 3800 if (av[0] && av[1] && _substrcmp(*av, "prob") == 0) { 3801 match_prob = strtod(av[1], NULL); 3802 3803 if (match_prob <= 0 || match_prob > 1) 3804 errx(EX_DATAERR, "illegal match prob. %s", av[1]); 3805 av += 2; 3806 } 3807 3808 /* action -- mandatory */ 3809 NEED1("missing action"); 3810 i = match_token(rule_actions, *av); 3811 av++; 3812 action->len = 1; /* default */ 3813 CHECK_ACTLEN; 3814 switch(i) { 3815 case TOK_CHECKSTATE: 3816 have_state = action; 3817 action->opcode = O_CHECK_STATE; 3818 if (*av == NULL || 3819 match_token(rule_options, *av) == TOK_COMMENT) { 3820 action->arg1 = pack_object(tstate, 3821 default_state_name, IPFW_TLV_STATE_NAME); 3822 break; 3823 } 3824 if (*av[0] == ':') { 3825 if (strcmp(*av + 1, "any") == 0) 3826 action->arg1 = 0; 3827 else if (state_check_name(*av + 1) == 0) 3828 action->arg1 = pack_object(tstate, *av + 1, 3829 IPFW_TLV_STATE_NAME); 3830 else 3831 errx(EX_DATAERR, "Invalid state name %s", 3832 *av); 3833 av++; 3834 break; 3835 } 3836 errx(EX_DATAERR, "Invalid state name %s", *av); 3837 break; 3838 3839 case TOK_ABORT: 3840 action->opcode = O_REJECT; 3841 action->arg1 = ICMP_REJECT_ABORT; 3842 break; 3843 3844 case TOK_ABORT6: 3845 action->opcode = O_UNREACH6; 3846 action->arg1 = ICMP6_UNREACH_ABORT; 3847 break; 3848 3849 case TOK_ACCEPT: 3850 action->opcode = O_ACCEPT; 3851 break; 3852 3853 case TOK_DENY: 3854 action->opcode = O_DENY; 3855 action->arg1 = 0; 3856 break; 3857 3858 case TOK_REJECT: 3859 action->opcode = O_REJECT; 3860 action->arg1 = ICMP_UNREACH_HOST; 3861 break; 3862 3863 case TOK_RESET: 3864 action->opcode = O_REJECT; 3865 action->arg1 = ICMP_REJECT_RST; 3866 break; 3867 3868 case TOK_RESET6: 3869 action->opcode = O_UNREACH6; 3870 action->arg1 = ICMP6_UNREACH_RST; 3871 break; 3872 3873 case TOK_UNREACH: 3874 action->opcode = O_REJECT; 3875 NEED1("missing reject code"); 3876 fill_reject_code(&action->arg1, *av); 3877 av++; 3878 break; 3879 3880 case TOK_UNREACH6: 3881 action->opcode = O_UNREACH6; 3882 NEED1("missing unreach code"); 3883 fill_unreach6_code(&action->arg1, *av); 3884 av++; 3885 break; 3886 3887 case TOK_COUNT: 3888 action->opcode = O_COUNT; 3889 break; 3890 3891 case TOK_NAT: 3892 action->opcode = O_NAT; 3893 action->len = F_INSN_SIZE(ipfw_insn_nat); 3894 CHECK_ACTLEN; 3895 if (*av != NULL && _substrcmp(*av, "global") == 0) { 3896 action->arg1 = IP_FW_NAT44_GLOBAL; 3897 av++; 3898 break; 3899 } else 3900 goto chkarg; 3901 case TOK_QUEUE: 3902 action->opcode = O_QUEUE; 3903 goto chkarg; 3904 case TOK_PIPE: 3905 action->opcode = O_PIPE; 3906 goto chkarg; 3907 case TOK_SKIPTO: 3908 action->opcode = O_SKIPTO; 3909 goto chkarg; 3910 case TOK_NETGRAPH: 3911 action->opcode = O_NETGRAPH; 3912 goto chkarg; 3913 case TOK_NGTEE: 3914 action->opcode = O_NGTEE; 3915 goto chkarg; 3916 case TOK_DIVERT: 3917 action->opcode = O_DIVERT; 3918 goto chkarg; 3919 case TOK_TEE: 3920 action->opcode = O_TEE; 3921 goto chkarg; 3922 case TOK_CALL: 3923 action->opcode = O_CALLRETURN; 3924 chkarg: 3925 if (!av[0]) 3926 errx(EX_USAGE, "missing argument for %s", *(av - 1)); 3927 if (isdigit(**av)) { 3928 action->arg1 = strtoul(*av, NULL, 10); 3929 if (action->arg1 <= 0 || action->arg1 >= IP_FW_TABLEARG) 3930 errx(EX_DATAERR, "illegal argument for %s", 3931 *(av - 1)); 3932 } else if (_substrcmp(*av, "tablearg") == 0) { 3933 action->arg1 = IP_FW_TARG; 3934 } else if (i == TOK_DIVERT || i == TOK_TEE) { 3935 struct servent *s; 3936 setservent(1); 3937 s = getservbyname(av[0], "divert"); 3938 if (s != NULL) 3939 action->arg1 = ntohs(s->s_port); 3940 else 3941 errx(EX_DATAERR, "illegal divert/tee port"); 3942 } else 3943 errx(EX_DATAERR, "illegal argument for %s", *(av - 1)); 3944 av++; 3945 break; 3946 3947 case TOK_FORWARD: { 3948 /* 3949 * Locate the address-port separator (':' or ','). 3950 * Could be one of the following: 3951 * hostname:port 3952 * IPv4 a.b.c.d,port 3953 * IPv4 a.b.c.d:port 3954 * IPv6 w:x:y::z,port 3955 * The ':' can only be used with hostname and IPv4 address. 3956 * XXX-BZ Should we also support [w:x:y::z]:port? 3957 */ 3958 struct sockaddr_storage result; 3959 struct addrinfo *res; 3960 char *s, *end; 3961 int family; 3962 u_short port_number; 3963 3964 NEED1("missing forward address[:port]"); 3965 3966 /* 3967 * locate the address-port separator (':' or ',') 3968 */ 3969 s = strchr(*av, ','); 3970 if (s == NULL) { 3971 /* Distinguish between IPv4:port and IPv6 cases. */ 3972 s = strchr(*av, ':'); 3973 if (s && strchr(s+1, ':')) 3974 s = NULL; /* no port */ 3975 } 3976 3977 port_number = 0; 3978 if (s != NULL) { 3979 /* Terminate host portion and set s to start of port. */ 3980 *(s++) = '\0'; 3981 i = strtoport(s, &end, 0 /* base */, 0 /* proto */); 3982 if (s == end) 3983 errx(EX_DATAERR, 3984 "illegal forwarding port ``%s''", s); 3985 port_number = (u_short)i; 3986 } 3987 3988 if (_substrcmp(*av, "tablearg") == 0) { 3989 family = PF_INET; 3990 ((struct sockaddr_in*)&result)->sin_addr.s_addr = 3991 INADDR_ANY; 3992 } else { 3993 /* 3994 * Resolve the host name or address to a family and a 3995 * network representation of the address. 3996 */ 3997 if (getaddrinfo(*av, NULL, NULL, &res)) 3998 errx(EX_DATAERR, NULL); 3999 /* Just use the first host in the answer. */ 4000 family = res->ai_family; 4001 memcpy(&result, res->ai_addr, res->ai_addrlen); 4002 freeaddrinfo(res); 4003 } 4004 4005 if (family == PF_INET) { 4006 ipfw_insn_sa *p = (ipfw_insn_sa *)action; 4007 4008 action->opcode = O_FORWARD_IP; 4009 action->len = F_INSN_SIZE(ipfw_insn_sa); 4010 CHECK_ACTLEN; 4011 4012 /* 4013 * In the kernel we assume AF_INET and use only 4014 * sin_port and sin_addr. Remember to set sin_len as 4015 * the routing code seems to use it too. 4016 */ 4017 p->sa.sin_len = sizeof(struct sockaddr_in); 4018 p->sa.sin_family = AF_INET; 4019 p->sa.sin_port = port_number; 4020 p->sa.sin_addr.s_addr = 4021 ((struct sockaddr_in *)&result)->sin_addr.s_addr; 4022 } else if (family == PF_INET6) { 4023 ipfw_insn_sa6 *p = (ipfw_insn_sa6 *)action; 4024 4025 action->opcode = O_FORWARD_IP6; 4026 action->len = F_INSN_SIZE(ipfw_insn_sa6); 4027 CHECK_ACTLEN; 4028 4029 p->sa.sin6_len = sizeof(struct sockaddr_in6); 4030 p->sa.sin6_family = AF_INET6; 4031 p->sa.sin6_port = port_number; 4032 p->sa.sin6_flowinfo = 0; 4033 p->sa.sin6_scope_id = 4034 ((struct sockaddr_in6 *)&result)->sin6_scope_id; 4035 bcopy(&((struct sockaddr_in6*)&result)->sin6_addr, 4036 &p->sa.sin6_addr, sizeof(p->sa.sin6_addr)); 4037 } else { 4038 errx(EX_DATAERR, "Invalid address family in forward action"); 4039 } 4040 av++; 4041 break; 4042 } 4043 case TOK_COMMENT: 4044 /* pretend it is a 'count' rule followed by the comment */ 4045 action->opcode = O_COUNT; 4046 av--; /* go back... */ 4047 break; 4048 4049 case TOK_SETFIB: 4050 { 4051 int numfibs; 4052 size_t intsize = sizeof(int); 4053 4054 action->opcode = O_SETFIB; 4055 NEED1("missing fib number"); 4056 if (_substrcmp(*av, "tablearg") == 0) { 4057 action->arg1 = IP_FW_TARG; 4058 } else { 4059 action->arg1 = strtoul(*av, NULL, 10); 4060 if (sysctlbyname("net.fibs", &numfibs, &intsize, 4061 NULL, 0) == -1) 4062 errx(EX_DATAERR, "fibs not suported.\n"); 4063 if (action->arg1 >= numfibs) /* Temporary */ 4064 errx(EX_DATAERR, "fib too large.\n"); 4065 /* Add high-order bit to fib to make room for tablearg*/ 4066 action->arg1 |= 0x8000; 4067 } 4068 av++; 4069 break; 4070 } 4071 4072 case TOK_SETDSCP: 4073 { 4074 int code; 4075 4076 action->opcode = O_SETDSCP; 4077 NEED1("missing DSCP code"); 4078 if (_substrcmp(*av, "tablearg") == 0) { 4079 action->arg1 = IP_FW_TARG; 4080 } else { 4081 if (isalpha(*av[0])) { 4082 if ((code = match_token(f_ipdscp, *av)) == -1) 4083 errx(EX_DATAERR, "Unknown DSCP code"); 4084 action->arg1 = code; 4085 } else 4086 action->arg1 = strtoul(*av, NULL, 10); 4087 /* 4088 * Add high-order bit to DSCP to make room 4089 * for tablearg 4090 */ 4091 action->arg1 |= 0x8000; 4092 } 4093 av++; 4094 break; 4095 } 4096 4097 case TOK_REASS: 4098 action->opcode = O_REASS; 4099 break; 4100 4101 case TOK_RETURN: 4102 fill_cmd(action, O_CALLRETURN, F_NOT, 0); 4103 break; 4104 4105 case TOK_TCPSETMSS: { 4106 u_long mss; 4107 uint16_t idx; 4108 4109 idx = pack_object(tstate, "tcp-setmss", IPFW_TLV_EACTION); 4110 if (idx == 0) 4111 errx(EX_DATAERR, "pack_object failed"); 4112 fill_cmd(action, O_EXTERNAL_ACTION, 0, idx); 4113 NEED1("Missing MSS value"); 4114 action = next_cmd(action, &ablen); 4115 action->len = 1; 4116 CHECK_ACTLEN; 4117 mss = strtoul(*av, NULL, 10); 4118 if (mss == 0 || mss > UINT16_MAX) 4119 errx(EX_USAGE, "invalid MSS value %s", *av); 4120 fill_cmd(action, O_EXTERNAL_DATA, 0, (uint16_t)mss); 4121 av++; 4122 break; 4123 } 4124 4125 default: 4126 av--; 4127 if (match_token(rule_eactions, *av) == -1) 4128 errx(EX_DATAERR, "invalid action %s\n", *av); 4129 /* 4130 * External actions support. 4131 * XXX: we support only syntax with instance name. 4132 * For known external actions (from rule_eactions list) 4133 * we can handle syntax directly. But with `eaction' 4134 * keyword we can use only `eaction <name> <instance>' 4135 * syntax. 4136 */ 4137 case TOK_EACTION: { 4138 uint16_t idx; 4139 4140 NEED1("Missing eaction name"); 4141 if (eaction_check_name(*av) != 0) 4142 errx(EX_DATAERR, "Invalid eaction name %s", *av); 4143 idx = pack_object(tstate, *av, IPFW_TLV_EACTION); 4144 if (idx == 0) 4145 errx(EX_DATAERR, "pack_object failed"); 4146 fill_cmd(action, O_EXTERNAL_ACTION, 0, idx); 4147 av++; 4148 NEED1("Missing eaction instance name"); 4149 action = next_cmd(action, &ablen); 4150 action->len = 1; 4151 CHECK_ACTLEN; 4152 if (eaction_check_name(*av) != 0) 4153 errx(EX_DATAERR, "Invalid eaction instance name %s", 4154 *av); 4155 /* 4156 * External action instance object has TLV type depended 4157 * from the external action name object index. Since we 4158 * currently don't know this index, use zero as TLV type. 4159 */ 4160 idx = pack_object(tstate, *av, 0); 4161 if (idx == 0) 4162 errx(EX_DATAERR, "pack_object failed"); 4163 fill_cmd(action, O_EXTERNAL_INSTANCE, 0, idx); 4164 av++; 4165 } 4166 } 4167 action = next_cmd(action, &ablen); 4168 4169 /* 4170 * [altq queuename] -- altq tag, optional 4171 * [log [logamount N]] -- log, optional 4172 * 4173 * If they exist, it go first in the cmdbuf, but then it is 4174 * skipped in the copy section to the end of the buffer. 4175 */ 4176 while (av[0] != NULL && (i = match_token(rule_action_params, *av)) != -1) { 4177 av++; 4178 switch (i) { 4179 case TOK_LOG: 4180 { 4181 ipfw_insn_log *c = (ipfw_insn_log *)cmd; 4182 int l; 4183 4184 if (have_log) 4185 errx(EX_DATAERR, 4186 "log cannot be specified more than once"); 4187 have_log = (ipfw_insn *)c; 4188 cmd->len = F_INSN_SIZE(ipfw_insn_log); 4189 CHECK_CMDLEN; 4190 cmd->opcode = O_LOG; 4191 if (av[0] && _substrcmp(*av, "logamount") == 0) { 4192 av++; 4193 NEED1("logamount requires argument"); 4194 l = atoi(*av); 4195 if (l < 0) 4196 errx(EX_DATAERR, 4197 "logamount must be positive"); 4198 c->max_log = l; 4199 av++; 4200 } else { 4201 len = sizeof(c->max_log); 4202 if (sysctlbyname("net.inet.ip.fw.verbose_limit", 4203 &c->max_log, &len, NULL, 0) == -1) { 4204 if (co.test_only) { 4205 c->max_log = 0; 4206 break; 4207 } 4208 errx(1, "sysctlbyname(\"%s\")", 4209 "net.inet.ip.fw.verbose_limit"); 4210 } 4211 } 4212 } 4213 break; 4214 4215 #ifndef NO_ALTQ 4216 case TOK_ALTQ: 4217 { 4218 ipfw_insn_altq *a = (ipfw_insn_altq *)cmd; 4219 4220 NEED1("missing altq queue name"); 4221 if (have_altq) 4222 errx(EX_DATAERR, 4223 "altq cannot be specified more than once"); 4224 have_altq = (ipfw_insn *)a; 4225 cmd->len = F_INSN_SIZE(ipfw_insn_altq); 4226 CHECK_CMDLEN; 4227 cmd->opcode = O_ALTQ; 4228 a->qid = altq_name_to_qid(*av); 4229 av++; 4230 } 4231 break; 4232 #endif 4233 4234 case TOK_TAG: 4235 case TOK_UNTAG: { 4236 uint16_t tag; 4237 4238 if (have_tag) 4239 errx(EX_USAGE, "tag and untag cannot be " 4240 "specified more than once"); 4241 GET_UINT_ARG(tag, IPFW_ARG_MIN, IPFW_ARG_MAX, i, 4242 rule_action_params); 4243 have_tag = cmd; 4244 fill_cmd(cmd, O_TAG, (i == TOK_TAG) ? 0: F_NOT, tag); 4245 av++; 4246 break; 4247 } 4248 4249 default: 4250 abort(); 4251 } 4252 cmd = next_cmd(cmd, &cblen); 4253 } 4254 4255 if (have_state) { /* must be a check-state, we are done */ 4256 if (*av != NULL && 4257 match_token(rule_options, *av) == TOK_COMMENT) { 4258 /* check-state has a comment */ 4259 av++; 4260 fill_comment(cmd, av, cblen); 4261 cmd = next_cmd(cmd, &cblen); 4262 av[0] = NULL; 4263 } 4264 goto done; 4265 } 4266 4267 #define OR_START(target) \ 4268 if (av[0] && (*av[0] == '(' || *av[0] == '{')) { \ 4269 if (open_par) \ 4270 errx(EX_USAGE, "nested \"(\" not allowed\n"); \ 4271 prev = NULL; \ 4272 open_par = 1; \ 4273 if ( (av[0])[1] == '\0') { \ 4274 av++; \ 4275 } else \ 4276 (*av)++; \ 4277 } \ 4278 target: \ 4279 4280 4281 #define CLOSE_PAR \ 4282 if (open_par) { \ 4283 if (av[0] && ( \ 4284 strcmp(*av, ")") == 0 || \ 4285 strcmp(*av, "}") == 0)) { \ 4286 prev = NULL; \ 4287 open_par = 0; \ 4288 av++; \ 4289 } else \ 4290 errx(EX_USAGE, "missing \")\"\n"); \ 4291 } 4292 4293 #define NOT_BLOCK \ 4294 if (av[0] && _substrcmp(*av, "not") == 0) { \ 4295 if (cmd->len & F_NOT) \ 4296 errx(EX_USAGE, "double \"not\" not allowed\n"); \ 4297 cmd->len |= F_NOT; \ 4298 av++; \ 4299 } 4300 4301 #define OR_BLOCK(target) \ 4302 if (av[0] && _substrcmp(*av, "or") == 0) { \ 4303 if (prev == NULL || open_par == 0) \ 4304 errx(EX_DATAERR, "invalid OR block"); \ 4305 prev->len |= F_OR; \ 4306 av++; \ 4307 goto target; \ 4308 } \ 4309 CLOSE_PAR; 4310 4311 first_cmd = cmd; 4312 4313 #if 0 4314 /* 4315 * MAC addresses, optional. 4316 * If we have this, we skip the part "proto from src to dst" 4317 * and jump straight to the option parsing. 4318 */ 4319 NOT_BLOCK; 4320 NEED1("missing protocol"); 4321 if (_substrcmp(*av, "MAC") == 0 || 4322 _substrcmp(*av, "mac") == 0) { 4323 av++; /* the "MAC" keyword */ 4324 add_mac(cmd, av); /* exits in case of errors */ 4325 cmd = next_cmd(cmd); 4326 av += 2; /* dst-mac and src-mac */ 4327 NOT_BLOCK; 4328 NEED1("missing mac type"); 4329 if (add_mactype(cmd, av[0])) 4330 cmd = next_cmd(cmd); 4331 av++; /* any or mac-type */ 4332 goto read_options; 4333 } 4334 #endif 4335 4336 /* 4337 * protocol, mandatory 4338 */ 4339 OR_START(get_proto); 4340 NOT_BLOCK; 4341 NEED1("missing protocol"); 4342 if (add_proto_compat(cmd, *av, &proto)) { 4343 av++; 4344 if (F_LEN(cmd) != 0) { 4345 prev = cmd; 4346 cmd = next_cmd(cmd, &cblen); 4347 } 4348 } else if (first_cmd != cmd) { 4349 errx(EX_DATAERR, "invalid protocol ``%s''", *av); 4350 } else { 4351 rule->flags |= IPFW_RULE_JUSTOPTS; 4352 goto read_options; 4353 } 4354 OR_BLOCK(get_proto); 4355 4356 /* 4357 * "from", mandatory 4358 */ 4359 if ((av[0] == NULL) || _substrcmp(*av, "from") != 0) 4360 errx(EX_USAGE, "missing ``from''"); 4361 av++; 4362 4363 /* 4364 * source IP, mandatory 4365 */ 4366 OR_START(source_ip); 4367 NOT_BLOCK; /* optional "not" */ 4368 NEED1("missing source address"); 4369 if (add_src(cmd, *av, proto, cblen, tstate)) { 4370 av++; 4371 if (F_LEN(cmd) != 0) { /* ! any */ 4372 prev = cmd; 4373 cmd = next_cmd(cmd, &cblen); 4374 } 4375 } else 4376 errx(EX_USAGE, "bad source address %s", *av); 4377 OR_BLOCK(source_ip); 4378 4379 /* 4380 * source ports, optional 4381 */ 4382 NOT_BLOCK; /* optional "not" */ 4383 if ( av[0] != NULL ) { 4384 if (_substrcmp(*av, "any") == 0 || 4385 add_ports(cmd, *av, proto, O_IP_SRCPORT, cblen)) { 4386 av++; 4387 if (F_LEN(cmd) != 0) 4388 cmd = next_cmd(cmd, &cblen); 4389 } 4390 } 4391 4392 /* 4393 * "to", mandatory 4394 */ 4395 if ( (av[0] == NULL) || _substrcmp(*av, "to") != 0 ) 4396 errx(EX_USAGE, "missing ``to''"); 4397 av++; 4398 4399 /* 4400 * destination, mandatory 4401 */ 4402 OR_START(dest_ip); 4403 NOT_BLOCK; /* optional "not" */ 4404 NEED1("missing dst address"); 4405 if (add_dst(cmd, *av, proto, cblen, tstate)) { 4406 av++; 4407 if (F_LEN(cmd) != 0) { /* ! any */ 4408 prev = cmd; 4409 cmd = next_cmd(cmd, &cblen); 4410 } 4411 } else 4412 errx( EX_USAGE, "bad destination address %s", *av); 4413 OR_BLOCK(dest_ip); 4414 4415 /* 4416 * dest. ports, optional 4417 */ 4418 NOT_BLOCK; /* optional "not" */ 4419 if (av[0]) { 4420 if (_substrcmp(*av, "any") == 0 || 4421 add_ports(cmd, *av, proto, O_IP_DSTPORT, cblen)) { 4422 av++; 4423 if (F_LEN(cmd) != 0) 4424 cmd = next_cmd(cmd, &cblen); 4425 } 4426 } 4427 4428 read_options: 4429 prev = NULL; 4430 while ( av[0] != NULL ) { 4431 char *s; 4432 ipfw_insn_u32 *cmd32; /* alias for cmd */ 4433 4434 s = *av; 4435 cmd32 = (ipfw_insn_u32 *)cmd; 4436 4437 if (*s == '!') { /* alternate syntax for NOT */ 4438 if (cmd->len & F_NOT) 4439 errx(EX_USAGE, "double \"not\" not allowed\n"); 4440 cmd->len = F_NOT; 4441 s++; 4442 } 4443 i = match_token(rule_options, s); 4444 av++; 4445 switch(i) { 4446 case TOK_NOT: 4447 if (cmd->len & F_NOT) 4448 errx(EX_USAGE, "double \"not\" not allowed\n"); 4449 cmd->len = F_NOT; 4450 break; 4451 4452 case TOK_OR: 4453 if (open_par == 0 || prev == NULL) 4454 errx(EX_USAGE, "invalid \"or\" block\n"); 4455 prev->len |= F_OR; 4456 break; 4457 4458 case TOK_STARTBRACE: 4459 if (open_par) 4460 errx(EX_USAGE, "+nested \"(\" not allowed\n"); 4461 open_par = 1; 4462 break; 4463 4464 case TOK_ENDBRACE: 4465 if (!open_par) 4466 errx(EX_USAGE, "+missing \")\"\n"); 4467 open_par = 0; 4468 prev = NULL; 4469 break; 4470 4471 case TOK_IN: 4472 fill_cmd(cmd, O_IN, 0, 0); 4473 break; 4474 4475 case TOK_OUT: 4476 cmd->len ^= F_NOT; /* toggle F_NOT */ 4477 fill_cmd(cmd, O_IN, 0, 0); 4478 break; 4479 4480 case TOK_DIVERTED: 4481 fill_cmd(cmd, O_DIVERTED, 0, 3); 4482 break; 4483 4484 case TOK_DIVERTEDLOOPBACK: 4485 fill_cmd(cmd, O_DIVERTED, 0, 1); 4486 break; 4487 4488 case TOK_DIVERTEDOUTPUT: 4489 fill_cmd(cmd, O_DIVERTED, 0, 2); 4490 break; 4491 4492 case TOK_FRAG: 4493 fill_cmd(cmd, O_FRAG, 0, 0); 4494 break; 4495 4496 case TOK_LAYER2: 4497 fill_cmd(cmd, O_LAYER2, 0, 0); 4498 break; 4499 4500 case TOK_XMIT: 4501 case TOK_RECV: 4502 case TOK_VIA: 4503 NEED1("recv, xmit, via require interface name" 4504 " or address"); 4505 fill_iface((ipfw_insn_if *)cmd, av[0], cblen, tstate); 4506 av++; 4507 if (F_LEN(cmd) == 0) /* not a valid address */ 4508 break; 4509 if (i == TOK_XMIT) 4510 cmd->opcode = O_XMIT; 4511 else if (i == TOK_RECV) 4512 cmd->opcode = O_RECV; 4513 else if (i == TOK_VIA) 4514 cmd->opcode = O_VIA; 4515 break; 4516 4517 case TOK_ICMPTYPES: 4518 NEED1("icmptypes requires list of types"); 4519 fill_icmptypes((ipfw_insn_u32 *)cmd, *av); 4520 av++; 4521 break; 4522 4523 case TOK_ICMP6TYPES: 4524 NEED1("icmptypes requires list of types"); 4525 fill_icmp6types((ipfw_insn_icmp6 *)cmd, *av, cblen); 4526 av++; 4527 break; 4528 4529 case TOK_IPTTL: 4530 NEED1("ipttl requires TTL"); 4531 if (strpbrk(*av, "-,")) { 4532 if (!add_ports(cmd, *av, 0, O_IPTTL, cblen)) 4533 errx(EX_DATAERR, "invalid ipttl %s", *av); 4534 } else 4535 fill_cmd(cmd, O_IPTTL, 0, strtoul(*av, NULL, 0)); 4536 av++; 4537 break; 4538 4539 case TOK_IPID: 4540 NEED1("ipid requires id"); 4541 if (strpbrk(*av, "-,")) { 4542 if (!add_ports(cmd, *av, 0, O_IPID, cblen)) 4543 errx(EX_DATAERR, "invalid ipid %s", *av); 4544 } else 4545 fill_cmd(cmd, O_IPID, 0, strtoul(*av, NULL, 0)); 4546 av++; 4547 break; 4548 4549 case TOK_IPLEN: 4550 NEED1("iplen requires length"); 4551 if (strpbrk(*av, "-,")) { 4552 if (!add_ports(cmd, *av, 0, O_IPLEN, cblen)) 4553 errx(EX_DATAERR, "invalid ip len %s", *av); 4554 } else 4555 fill_cmd(cmd, O_IPLEN, 0, strtoul(*av, NULL, 0)); 4556 av++; 4557 break; 4558 4559 case TOK_IPVER: 4560 NEED1("ipver requires version"); 4561 fill_cmd(cmd, O_IPVER, 0, strtoul(*av, NULL, 0)); 4562 av++; 4563 break; 4564 4565 case TOK_IPPRECEDENCE: 4566 NEED1("ipprecedence requires value"); 4567 fill_cmd(cmd, O_IPPRECEDENCE, 0, 4568 (strtoul(*av, NULL, 0) & 7) << 5); 4569 av++; 4570 break; 4571 4572 case TOK_DSCP: 4573 NEED1("missing DSCP code"); 4574 fill_dscp(cmd, *av, cblen); 4575 av++; 4576 break; 4577 4578 case TOK_IPOPTS: 4579 NEED1("missing argument for ipoptions"); 4580 fill_flags_cmd(cmd, O_IPOPT, f_ipopts, *av); 4581 av++; 4582 break; 4583 4584 case TOK_IPTOS: 4585 NEED1("missing argument for iptos"); 4586 fill_flags_cmd(cmd, O_IPTOS, f_iptos, *av); 4587 av++; 4588 break; 4589 4590 case TOK_UID: 4591 NEED1("uid requires argument"); 4592 { 4593 char *end; 4594 uid_t uid; 4595 struct passwd *pwd; 4596 4597 cmd->opcode = O_UID; 4598 uid = strtoul(*av, &end, 0); 4599 pwd = (*end == '\0') ? getpwuid(uid) : getpwnam(*av); 4600 if (pwd == NULL) 4601 errx(EX_DATAERR, "uid \"%s\" nonexistent", *av); 4602 cmd32->d[0] = pwd->pw_uid; 4603 cmd->len |= F_INSN_SIZE(ipfw_insn_u32); 4604 av++; 4605 } 4606 break; 4607 4608 case TOK_GID: 4609 NEED1("gid requires argument"); 4610 { 4611 char *end; 4612 gid_t gid; 4613 struct group *grp; 4614 4615 cmd->opcode = O_GID; 4616 gid = strtoul(*av, &end, 0); 4617 grp = (*end == '\0') ? getgrgid(gid) : getgrnam(*av); 4618 if (grp == NULL) 4619 errx(EX_DATAERR, "gid \"%s\" nonexistent", *av); 4620 cmd32->d[0] = grp->gr_gid; 4621 cmd->len |= F_INSN_SIZE(ipfw_insn_u32); 4622 av++; 4623 } 4624 break; 4625 4626 case TOK_JAIL: 4627 NEED1("jail requires argument"); 4628 { 4629 int jid; 4630 4631 cmd->opcode = O_JAIL; 4632 jid = jail_getid(*av); 4633 if (jid < 0) 4634 errx(EX_DATAERR, "%s", jail_errmsg); 4635 cmd32->d[0] = (uint32_t)jid; 4636 cmd->len |= F_INSN_SIZE(ipfw_insn_u32); 4637 av++; 4638 } 4639 break; 4640 4641 case TOK_ESTAB: 4642 fill_cmd(cmd, O_ESTAB, 0, 0); 4643 break; 4644 4645 case TOK_SETUP: 4646 fill_cmd(cmd, O_TCPFLAGS, 0, 4647 (TH_SYN) | ( (TH_ACK) & 0xff) <<8 ); 4648 break; 4649 4650 case TOK_TCPDATALEN: 4651 NEED1("tcpdatalen requires length"); 4652 if (strpbrk(*av, "-,")) { 4653 if (!add_ports(cmd, *av, 0, O_TCPDATALEN, cblen)) 4654 errx(EX_DATAERR, "invalid tcpdata len %s", *av); 4655 } else 4656 fill_cmd(cmd, O_TCPDATALEN, 0, 4657 strtoul(*av, NULL, 0)); 4658 av++; 4659 break; 4660 4661 case TOK_TCPOPTS: 4662 NEED1("missing argument for tcpoptions"); 4663 fill_flags_cmd(cmd, O_TCPOPTS, f_tcpopts, *av); 4664 av++; 4665 break; 4666 4667 case TOK_TCPSEQ: 4668 case TOK_TCPACK: 4669 NEED1("tcpseq/tcpack requires argument"); 4670 cmd->len = F_INSN_SIZE(ipfw_insn_u32); 4671 cmd->opcode = (i == TOK_TCPSEQ) ? O_TCPSEQ : O_TCPACK; 4672 cmd32->d[0] = htonl(strtoul(*av, NULL, 0)); 4673 av++; 4674 break; 4675 4676 case TOK_TCPWIN: 4677 NEED1("tcpwin requires length"); 4678 if (strpbrk(*av, "-,")) { 4679 if (!add_ports(cmd, *av, 0, O_TCPWIN, cblen)) 4680 errx(EX_DATAERR, "invalid tcpwin len %s", *av); 4681 } else 4682 fill_cmd(cmd, O_TCPWIN, 0, 4683 strtoul(*av, NULL, 0)); 4684 av++; 4685 break; 4686 4687 case TOK_TCPFLAGS: 4688 NEED1("missing argument for tcpflags"); 4689 cmd->opcode = O_TCPFLAGS; 4690 fill_flags_cmd(cmd, O_TCPFLAGS, f_tcpflags, *av); 4691 av++; 4692 break; 4693 4694 case TOK_KEEPSTATE: 4695 case TOK_RECORDSTATE: { 4696 uint16_t uidx; 4697 4698 if (open_par) 4699 errx(EX_USAGE, "keep-state or record-state cannot be part " 4700 "of an or block"); 4701 if (have_state) 4702 errx(EX_USAGE, "only one of keep-state, record-state, " 4703 " limit and set-limit is allowed"); 4704 if (*av != NULL && *av[0] == ':') { 4705 if (state_check_name(*av + 1) != 0) 4706 errx(EX_DATAERR, 4707 "Invalid state name %s", *av); 4708 uidx = pack_object(tstate, *av + 1, 4709 IPFW_TLV_STATE_NAME); 4710 av++; 4711 } else 4712 uidx = pack_object(tstate, default_state_name, 4713 IPFW_TLV_STATE_NAME); 4714 have_state = cmd; 4715 have_rstate = i == TOK_RECORDSTATE; 4716 fill_cmd(cmd, O_KEEP_STATE, 0, uidx); 4717 break; 4718 } 4719 4720 case TOK_LIMIT: 4721 case TOK_SETLIMIT: { 4722 ipfw_insn_limit *c = (ipfw_insn_limit *)cmd; 4723 int val; 4724 4725 if (open_par) 4726 errx(EX_USAGE, 4727 "limit or set-limit cannot be part of an or block"); 4728 if (have_state) 4729 errx(EX_USAGE, "only one of keep-state, record-state, " 4730 " limit and set-limit is allowed"); 4731 have_state = cmd; 4732 have_rstate = i == TOK_SETLIMIT; 4733 4734 cmd->len = F_INSN_SIZE(ipfw_insn_limit); 4735 CHECK_CMDLEN; 4736 cmd->opcode = O_LIMIT; 4737 c->limit_mask = c->conn_limit = 0; 4738 4739 while ( av[0] != NULL ) { 4740 if ((val = match_token(limit_masks, *av)) <= 0) 4741 break; 4742 c->limit_mask |= val; 4743 av++; 4744 } 4745 4746 if (c->limit_mask == 0) 4747 errx(EX_USAGE, "limit: missing limit mask"); 4748 4749 GET_UINT_ARG(c->conn_limit, IPFW_ARG_MIN, IPFW_ARG_MAX, 4750 TOK_LIMIT, rule_options); 4751 av++; 4752 4753 if (*av != NULL && *av[0] == ':') { 4754 if (state_check_name(*av + 1) != 0) 4755 errx(EX_DATAERR, 4756 "Invalid state name %s", *av); 4757 cmd->arg1 = pack_object(tstate, *av + 1, 4758 IPFW_TLV_STATE_NAME); 4759 av++; 4760 } else 4761 cmd->arg1 = pack_object(tstate, 4762 default_state_name, IPFW_TLV_STATE_NAME); 4763 break; 4764 } 4765 4766 case TOK_PROTO: 4767 NEED1("missing protocol"); 4768 if (add_proto(cmd, *av, &proto)) { 4769 av++; 4770 } else 4771 errx(EX_DATAERR, "invalid protocol ``%s''", 4772 *av); 4773 break; 4774 4775 case TOK_SRCIP: 4776 NEED1("missing source IP"); 4777 if (add_srcip(cmd, *av, cblen, tstate)) { 4778 av++; 4779 } 4780 break; 4781 4782 case TOK_DSTIP: 4783 NEED1("missing destination IP"); 4784 if (add_dstip(cmd, *av, cblen, tstate)) { 4785 av++; 4786 } 4787 break; 4788 4789 case TOK_SRCIP6: 4790 NEED1("missing source IP6"); 4791 if (add_srcip6(cmd, *av, cblen, tstate)) { 4792 av++; 4793 } 4794 break; 4795 4796 case TOK_DSTIP6: 4797 NEED1("missing destination IP6"); 4798 if (add_dstip6(cmd, *av, cblen, tstate)) { 4799 av++; 4800 } 4801 break; 4802 4803 case TOK_SRCPORT: 4804 NEED1("missing source port"); 4805 if (_substrcmp(*av, "any") == 0 || 4806 add_ports(cmd, *av, proto, O_IP_SRCPORT, cblen)) { 4807 av++; 4808 } else 4809 errx(EX_DATAERR, "invalid source port %s", *av); 4810 break; 4811 4812 case TOK_DSTPORT: 4813 NEED1("missing destination port"); 4814 if (_substrcmp(*av, "any") == 0 || 4815 add_ports(cmd, *av, proto, O_IP_DSTPORT, cblen)) { 4816 av++; 4817 } else 4818 errx(EX_DATAERR, "invalid destination port %s", 4819 *av); 4820 break; 4821 4822 case TOK_MAC: 4823 if (add_mac(cmd, av, cblen)) 4824 av += 2; 4825 break; 4826 4827 case TOK_MACTYPE: 4828 NEED1("missing mac type"); 4829 if (!add_mactype(cmd, *av, cblen)) 4830 errx(EX_DATAERR, "invalid mac type %s", *av); 4831 av++; 4832 break; 4833 4834 case TOK_VERREVPATH: 4835 fill_cmd(cmd, O_VERREVPATH, 0, 0); 4836 break; 4837 4838 case TOK_VERSRCREACH: 4839 fill_cmd(cmd, O_VERSRCREACH, 0, 0); 4840 break; 4841 4842 case TOK_ANTISPOOF: 4843 fill_cmd(cmd, O_ANTISPOOF, 0, 0); 4844 break; 4845 4846 case TOK_IPSEC: 4847 fill_cmd(cmd, O_IPSEC, 0, 0); 4848 break; 4849 4850 case TOK_IPV6: 4851 fill_cmd(cmd, O_IP6, 0, 0); 4852 break; 4853 4854 case TOK_IPV4: 4855 fill_cmd(cmd, O_IP4, 0, 0); 4856 break; 4857 4858 case TOK_EXT6HDR: 4859 fill_ext6hdr( cmd, *av ); 4860 av++; 4861 break; 4862 4863 case TOK_FLOWID: 4864 if (proto != IPPROTO_IPV6 ) 4865 errx( EX_USAGE, "flow-id filter is active " 4866 "only for ipv6 protocol\n"); 4867 fill_flow6( (ipfw_insn_u32 *) cmd, *av, cblen); 4868 av++; 4869 break; 4870 4871 case TOK_COMMENT: 4872 fill_comment(cmd, av, cblen); 4873 av[0]=NULL; 4874 break; 4875 4876 case TOK_TAGGED: 4877 if (av[0] && strpbrk(*av, "-,")) { 4878 if (!add_ports(cmd, *av, 0, O_TAGGED, cblen)) 4879 errx(EX_DATAERR, "tagged: invalid tag" 4880 " list: %s", *av); 4881 } 4882 else { 4883 uint16_t tag; 4884 4885 GET_UINT_ARG(tag, IPFW_ARG_MIN, IPFW_ARG_MAX, 4886 TOK_TAGGED, rule_options); 4887 fill_cmd(cmd, O_TAGGED, 0, tag); 4888 } 4889 av++; 4890 break; 4891 4892 case TOK_FIB: 4893 NEED1("fib requires fib number"); 4894 fill_cmd(cmd, O_FIB, 0, strtoul(*av, NULL, 0)); 4895 av++; 4896 break; 4897 case TOK_SOCKARG: 4898 fill_cmd(cmd, O_SOCKARG, 0, 0); 4899 break; 4900 4901 case TOK_LOOKUP: { 4902 ipfw_insn_u32 *c = (ipfw_insn_u32 *)cmd; 4903 int j; 4904 4905 if (!av[0] || !av[1]) 4906 errx(EX_USAGE, "format: lookup argument tablenum"); 4907 cmd->opcode = O_IP_DST_LOOKUP; 4908 cmd->len |= F_INSN_SIZE(ipfw_insn) + 2; 4909 i = match_token(rule_options, *av); 4910 for (j = 0; lookup_key[j] >= 0 ; j++) { 4911 if (i == lookup_key[j]) 4912 break; 4913 } 4914 if (lookup_key[j] <= 0) 4915 errx(EX_USAGE, "format: cannot lookup on %s", *av); 4916 __PAST_END(c->d, 1) = j; // i converted to option 4917 av++; 4918 4919 if ((j = pack_table(tstate, *av)) == 0) 4920 errx(EX_DATAERR, "Invalid table name: %s", *av); 4921 4922 cmd->arg1 = j; 4923 av++; 4924 } 4925 break; 4926 case TOK_FLOW: 4927 NEED1("missing table name"); 4928 if (strncmp(*av, "table(", 6) != 0) 4929 errx(EX_DATAERR, 4930 "enclose table name into \"table()\""); 4931 fill_table(cmd, *av, O_IP_FLOW_LOOKUP, tstate); 4932 av++; 4933 break; 4934 4935 case TOK_SKIPACTION: 4936 if (have_skipcmd) 4937 errx(EX_USAGE, "only one defer-action " 4938 "is allowed"); 4939 have_skipcmd = cmd; 4940 fill_cmd(cmd, O_SKIP_ACTION, 0, 0); 4941 break; 4942 4943 default: 4944 errx(EX_USAGE, "unrecognised option [%d] %s\n", i, s); 4945 } 4946 if (F_LEN(cmd) > 0) { /* prepare to advance */ 4947 prev = cmd; 4948 cmd = next_cmd(cmd, &cblen); 4949 } 4950 } 4951 4952 done: 4953 4954 if (!have_state && have_skipcmd) 4955 warnx("Rule contains \"defer-immediate-action\" " 4956 "and doesn't contain any state-related options."); 4957 4958 /* 4959 * Now copy stuff into the rule. 4960 * If we have a keep-state option, the first instruction 4961 * must be a PROBE_STATE (which is generated here). 4962 * If we have a LOG option, it was stored as the first command, 4963 * and now must be moved to the top of the action part. 4964 */ 4965 dst = (ipfw_insn *)rule->cmd; 4966 4967 /* 4968 * First thing to write into the command stream is the match probability. 4969 */ 4970 if (match_prob != 1) { /* 1 means always match */ 4971 dst->opcode = O_PROB; 4972 dst->len = 2; 4973 *((int32_t *)(dst+1)) = (int32_t)(match_prob * 0x7fffffff); 4974 dst += dst->len; 4975 } 4976 4977 /* 4978 * generate O_PROBE_STATE if necessary 4979 */ 4980 if (have_state && have_state->opcode != O_CHECK_STATE && !have_rstate) { 4981 fill_cmd(dst, O_PROBE_STATE, 0, have_state->arg1); 4982 dst = next_cmd(dst, &rblen); 4983 } 4984 4985 /* 4986 * copy all commands but O_LOG, O_KEEP_STATE, O_LIMIT, O_ALTQ, O_TAG, 4987 * O_SKIP_ACTION 4988 */ 4989 for (src = (ipfw_insn *)cmdbuf; src != cmd; src += i) { 4990 i = F_LEN(src); 4991 CHECK_RBUFLEN(i); 4992 4993 switch (src->opcode) { 4994 case O_LOG: 4995 case O_KEEP_STATE: 4996 case O_LIMIT: 4997 case O_ALTQ: 4998 case O_TAG: 4999 case O_SKIP_ACTION: 5000 break; 5001 default: 5002 bcopy(src, dst, i * sizeof(uint32_t)); 5003 dst += i; 5004 } 5005 } 5006 5007 /* 5008 * put back the have_state command as last opcode 5009 */ 5010 if (have_state && have_state->opcode != O_CHECK_STATE) { 5011 i = F_LEN(have_state); 5012 CHECK_RBUFLEN(i); 5013 bcopy(have_state, dst, i * sizeof(uint32_t)); 5014 dst += i; 5015 } 5016 5017 /* 5018 * put back the have_skipcmd command as very last opcode 5019 */ 5020 if (have_skipcmd) { 5021 i = F_LEN(have_skipcmd); 5022 CHECK_RBUFLEN(i); 5023 bcopy(have_skipcmd, dst, i * sizeof(uint32_t)); 5024 dst += i; 5025 } 5026 5027 /* 5028 * start action section 5029 */ 5030 rule->act_ofs = dst - rule->cmd; 5031 5032 /* put back O_LOG, O_ALTQ, O_TAG if necessary */ 5033 if (have_log) { 5034 i = F_LEN(have_log); 5035 CHECK_RBUFLEN(i); 5036 bcopy(have_log, dst, i * sizeof(uint32_t)); 5037 dst += i; 5038 } 5039 if (have_altq) { 5040 i = F_LEN(have_altq); 5041 CHECK_RBUFLEN(i); 5042 bcopy(have_altq, dst, i * sizeof(uint32_t)); 5043 dst += i; 5044 } 5045 if (have_tag) { 5046 i = F_LEN(have_tag); 5047 CHECK_RBUFLEN(i); 5048 bcopy(have_tag, dst, i * sizeof(uint32_t)); 5049 dst += i; 5050 } 5051 5052 /* 5053 * copy all other actions 5054 */ 5055 for (src = (ipfw_insn *)actbuf; src != action; src += i) { 5056 i = F_LEN(src); 5057 CHECK_RBUFLEN(i); 5058 bcopy(src, dst, i * sizeof(uint32_t)); 5059 dst += i; 5060 } 5061 5062 rule->cmd_len = (uint32_t *)dst - (uint32_t *)(rule->cmd); 5063 *rbufsize = (char *)dst - (char *)rule; 5064 } 5065 5066 static int 5067 compare_ntlv(const void *_a, const void *_b) 5068 { 5069 ipfw_obj_ntlv *a, *b; 5070 5071 a = (ipfw_obj_ntlv *)_a; 5072 b = (ipfw_obj_ntlv *)_b; 5073 5074 if (a->set < b->set) 5075 return (-1); 5076 else if (a->set > b->set) 5077 return (1); 5078 5079 if (a->idx < b->idx) 5080 return (-1); 5081 else if (a->idx > b->idx) 5082 return (1); 5083 5084 if (a->head.type < b->head.type) 5085 return (-1); 5086 else if (a->head.type > b->head.type) 5087 return (1); 5088 5089 return (0); 5090 } 5091 5092 /* 5093 * Provide kernel with sorted list of referenced objects 5094 */ 5095 static void 5096 object_sort_ctlv(ipfw_obj_ctlv *ctlv) 5097 { 5098 5099 qsort(ctlv + 1, ctlv->count, ctlv->objsize, compare_ntlv); 5100 } 5101 5102 struct object_kt { 5103 uint16_t uidx; 5104 uint16_t type; 5105 }; 5106 static int 5107 compare_object_kntlv(const void *k, const void *v) 5108 { 5109 ipfw_obj_ntlv *ntlv; 5110 struct object_kt key; 5111 5112 key = *((struct object_kt *)k); 5113 ntlv = (ipfw_obj_ntlv *)v; 5114 5115 if (key.uidx < ntlv->idx) 5116 return (-1); 5117 else if (key.uidx > ntlv->idx) 5118 return (1); 5119 5120 if (key.type < ntlv->head.type) 5121 return (-1); 5122 else if (key.type > ntlv->head.type) 5123 return (1); 5124 5125 return (0); 5126 } 5127 5128 /* 5129 * Finds object name in @ctlv by @idx and @type. 5130 * Uses the following facts: 5131 * 1) All TLVs are the same size 5132 * 2) Kernel implementation provides already sorted list. 5133 * 5134 * Returns table name or NULL. 5135 */ 5136 static char * 5137 object_search_ctlv(ipfw_obj_ctlv *ctlv, uint16_t idx, uint16_t type) 5138 { 5139 ipfw_obj_ntlv *ntlv; 5140 struct object_kt key; 5141 5142 key.uidx = idx; 5143 key.type = type; 5144 5145 ntlv = bsearch(&key, (ctlv + 1), ctlv->count, ctlv->objsize, 5146 compare_object_kntlv); 5147 5148 if (ntlv != NULL) 5149 return (ntlv->name); 5150 5151 return (NULL); 5152 } 5153 5154 static char * 5155 table_search_ctlv(ipfw_obj_ctlv *ctlv, uint16_t idx) 5156 { 5157 5158 return (object_search_ctlv(ctlv, idx, IPFW_TLV_TBL_NAME)); 5159 } 5160 5161 /* 5162 * Adds one or more rules to ipfw chain. 5163 * Data layout: 5164 * Request: 5165 * [ 5166 * ip_fw3_opheader 5167 * [ ipfw_obj_ctlv(IPFW_TLV_TBL_LIST) ipfw_obj_ntlv x N ] (optional *1) 5168 * [ ipfw_obj_ctlv(IPFW_TLV_RULE_LIST) [ ip_fw_rule ip_fw_insn ] x N ] (*2) (*3) 5169 * ] 5170 * Reply: 5171 * [ 5172 * ip_fw3_opheader 5173 * [ ipfw_obj_ctlv(IPFW_TLV_TBL_LIST) ipfw_obj_ntlv x N ] (optional) 5174 * [ ipfw_obj_ctlv(IPFW_TLV_RULE_LIST) [ ip_fw_rule ip_fw_insn ] x N ] 5175 * ] 5176 * 5177 * Rules in reply are modified to store their actual ruleset number. 5178 * 5179 * (*1) TLVs inside IPFW_TLV_TBL_LIST needs to be sorted ascending 5180 * according to their idx field and there has to be no duplicates. 5181 * (*2) Numbered rules inside IPFW_TLV_RULE_LIST needs to be sorted ascending. 5182 * (*3) Each ip_fw structure needs to be aligned to u64 boundary. 5183 */ 5184 void 5185 ipfw_add(char *av[]) 5186 { 5187 uint32_t rulebuf[1024]; 5188 int rbufsize, default_off, tlen, rlen; 5189 size_t sz; 5190 struct tidx ts; 5191 struct ip_fw_rule *rule; 5192 caddr_t tbuf; 5193 ip_fw3_opheader *op3; 5194 ipfw_obj_ctlv *ctlv, *tstate; 5195 5196 rbufsize = sizeof(rulebuf); 5197 memset(rulebuf, 0, rbufsize); 5198 memset(&ts, 0, sizeof(ts)); 5199 5200 /* Optimize case with no tables */ 5201 default_off = sizeof(ipfw_obj_ctlv) + sizeof(ip_fw3_opheader); 5202 op3 = (ip_fw3_opheader *)rulebuf; 5203 ctlv = (ipfw_obj_ctlv *)(op3 + 1); 5204 rule = (struct ip_fw_rule *)(ctlv + 1); 5205 rbufsize -= default_off; 5206 5207 compile_rule(av, (uint32_t *)rule, &rbufsize, &ts); 5208 /* Align rule size to u64 boundary */ 5209 rlen = roundup2(rbufsize, sizeof(uint64_t)); 5210 5211 tbuf = NULL; 5212 sz = 0; 5213 tstate = NULL; 5214 if (ts.count != 0) { 5215 /* Some tables. We have to alloc more data */ 5216 tlen = ts.count * sizeof(ipfw_obj_ntlv); 5217 sz = default_off + sizeof(ipfw_obj_ctlv) + tlen + rlen; 5218 5219 if ((tbuf = calloc(1, sz)) == NULL) 5220 err(EX_UNAVAILABLE, "malloc() failed for IP_FW_ADD"); 5221 op3 = (ip_fw3_opheader *)tbuf; 5222 /* Tables first */ 5223 ctlv = (ipfw_obj_ctlv *)(op3 + 1); 5224 ctlv->head.type = IPFW_TLV_TBLNAME_LIST; 5225 ctlv->head.length = sizeof(ipfw_obj_ctlv) + tlen; 5226 ctlv->count = ts.count; 5227 ctlv->objsize = sizeof(ipfw_obj_ntlv); 5228 memcpy(ctlv + 1, ts.idx, tlen); 5229 object_sort_ctlv(ctlv); 5230 tstate = ctlv; 5231 /* Rule next */ 5232 ctlv = (ipfw_obj_ctlv *)((caddr_t)ctlv + ctlv->head.length); 5233 ctlv->head.type = IPFW_TLV_RULE_LIST; 5234 ctlv->head.length = sizeof(ipfw_obj_ctlv) + rlen; 5235 ctlv->count = 1; 5236 memcpy(ctlv + 1, rule, rbufsize); 5237 } else { 5238 /* Simply add header */ 5239 sz = rlen + default_off; 5240 memset(ctlv, 0, sizeof(*ctlv)); 5241 ctlv->head.type = IPFW_TLV_RULE_LIST; 5242 ctlv->head.length = sizeof(ipfw_obj_ctlv) + rlen; 5243 ctlv->count = 1; 5244 } 5245 5246 if (do_get3(IP_FW_XADD, op3, &sz) != 0) 5247 err(EX_UNAVAILABLE, "getsockopt(%s)", "IP_FW_XADD"); 5248 5249 if (!co.do_quiet) { 5250 struct format_opts sfo; 5251 struct buf_pr bp; 5252 memset(&sfo, 0, sizeof(sfo)); 5253 sfo.tstate = tstate; 5254 sfo.set_mask = (uint32_t)(-1); 5255 bp_alloc(&bp, 4096); 5256 show_static_rule(&co, &sfo, &bp, rule, NULL); 5257 printf("%s", bp.buf); 5258 bp_free(&bp); 5259 } 5260 5261 if (tbuf != NULL) 5262 free(tbuf); 5263 5264 if (ts.idx != NULL) 5265 free(ts.idx); 5266 } 5267 5268 /* 5269 * clear the counters or the log counters. 5270 * optname has the following values: 5271 * 0 (zero both counters and logging) 5272 * 1 (zero logging only) 5273 */ 5274 void 5275 ipfw_zero(int ac, char *av[], int optname) 5276 { 5277 ipfw_range_tlv rt; 5278 char const *errstr; 5279 char const *name = optname ? "RESETLOG" : "ZERO"; 5280 uint32_t arg; 5281 int failed = EX_OK; 5282 5283 optname = optname ? IP_FW_XRESETLOG : IP_FW_XZERO; 5284 av++; ac--; 5285 5286 if (ac == 0) { 5287 /* clear all entries */ 5288 memset(&rt, 0, sizeof(rt)); 5289 rt.flags = IPFW_RCFLAG_ALL; 5290 if (do_range_cmd(optname, &rt) < 0) 5291 err(EX_UNAVAILABLE, "setsockopt(IP_FW_X%s)", name); 5292 if (!co.do_quiet) 5293 printf("%s.\n", optname == IP_FW_XZERO ? 5294 "Accounting cleared":"Logging counts reset"); 5295 5296 return; 5297 } 5298 5299 while (ac) { 5300 /* Rule number */ 5301 if (isdigit(**av)) { 5302 arg = strtonum(*av, 0, 0xffff, &errstr); 5303 if (errstr) 5304 errx(EX_DATAERR, 5305 "invalid rule number %s\n", *av); 5306 memset(&rt, 0, sizeof(rt)); 5307 rt.start_rule = arg; 5308 rt.end_rule = arg; 5309 rt.flags |= IPFW_RCFLAG_RANGE; 5310 if (co.use_set != 0) { 5311 rt.set = co.use_set - 1; 5312 rt.flags |= IPFW_RCFLAG_SET; 5313 } 5314 if (do_range_cmd(optname, &rt) != 0) { 5315 warn("rule %u: setsockopt(IP_FW_X%s)", 5316 arg, name); 5317 failed = EX_UNAVAILABLE; 5318 } else if (rt.new_set == 0) { 5319 printf("Entry %d not found\n", arg); 5320 failed = EX_UNAVAILABLE; 5321 } else if (!co.do_quiet) 5322 printf("Entry %d %s.\n", arg, 5323 optname == IP_FW_XZERO ? 5324 "cleared" : "logging count reset"); 5325 } else { 5326 errx(EX_USAGE, "invalid rule number ``%s''", *av); 5327 } 5328 av++; ac--; 5329 } 5330 if (failed != EX_OK) 5331 exit(failed); 5332 } 5333 5334 void 5335 ipfw_flush(int force) 5336 { 5337 ipfw_range_tlv rt; 5338 5339 if (!force && !co.do_quiet) { /* need to ask user */ 5340 int c; 5341 5342 printf("Are you sure? [yn] "); 5343 fflush(stdout); 5344 do { 5345 c = toupper(getc(stdin)); 5346 while (c != '\n' && getc(stdin) != '\n') 5347 if (feof(stdin)) 5348 return; /* and do not flush */ 5349 } while (c != 'Y' && c != 'N'); 5350 printf("\n"); 5351 if (c == 'N') /* user said no */ 5352 return; 5353 } 5354 if (co.do_pipe) { 5355 dummynet_flush(); 5356 return; 5357 } 5358 /* `ipfw set N flush` - is the same that `ipfw delete set N` */ 5359 memset(&rt, 0, sizeof(rt)); 5360 if (co.use_set != 0) { 5361 rt.set = co.use_set - 1; 5362 rt.flags = IPFW_RCFLAG_SET; 5363 } else 5364 rt.flags = IPFW_RCFLAG_ALL; 5365 if (do_range_cmd(IP_FW_XDEL, &rt) != 0) 5366 err(EX_UNAVAILABLE, "setsockopt(IP_FW_XDEL)"); 5367 if (!co.do_quiet) 5368 printf("Flushed all %s.\n", co.do_pipe ? "pipes" : "rules"); 5369 } 5370 5371 static struct _s_x intcmds[] = { 5372 { "talist", TOK_TALIST }, 5373 { "iflist", TOK_IFLIST }, 5374 { "olist", TOK_OLIST }, 5375 { "vlist", TOK_VLIST }, 5376 { NULL, 0 } 5377 }; 5378 5379 static struct _s_x otypes[] = { 5380 { "EACTION", IPFW_TLV_EACTION }, 5381 { "DYNSTATE", IPFW_TLV_STATE_NAME }, 5382 { NULL, 0 } 5383 }; 5384 5385 static const char* 5386 lookup_eaction_name(ipfw_obj_ntlv *ntlv, int cnt, uint16_t type) 5387 { 5388 const char *name; 5389 int i; 5390 5391 name = NULL; 5392 for (i = 0; i < cnt; i++) { 5393 if (ntlv[i].head.type != IPFW_TLV_EACTION) 5394 continue; 5395 if (IPFW_TLV_EACTION_NAME(ntlv[i].idx) != type) 5396 continue; 5397 name = ntlv[i].name; 5398 break; 5399 } 5400 return (name); 5401 } 5402 5403 static void 5404 ipfw_list_objects(int ac, char *av[]) 5405 { 5406 ipfw_obj_lheader req, *olh; 5407 ipfw_obj_ntlv *ntlv; 5408 const char *name; 5409 size_t sz; 5410 int i; 5411 5412 memset(&req, 0, sizeof(req)); 5413 sz = sizeof(req); 5414 if (do_get3(IP_FW_DUMP_SRVOBJECTS, &req.opheader, &sz) != 0) 5415 if (errno != ENOMEM) 5416 return; 5417 5418 sz = req.size; 5419 if ((olh = calloc(1, sz)) == NULL) 5420 return; 5421 5422 olh->size = sz; 5423 if (do_get3(IP_FW_DUMP_SRVOBJECTS, &olh->opheader, &sz) != 0) { 5424 free(olh); 5425 return; 5426 } 5427 5428 if (olh->count > 0) 5429 printf("Objects list:\n"); 5430 else 5431 printf("There are no objects\n"); 5432 ntlv = (ipfw_obj_ntlv *)(olh + 1); 5433 for (i = 0; i < olh->count; i++) { 5434 name = match_value(otypes, ntlv->head.type); 5435 if (name == NULL) 5436 name = lookup_eaction_name( 5437 (ipfw_obj_ntlv *)(olh + 1), olh->count, 5438 ntlv->head.type); 5439 if (name == NULL) 5440 printf(" kidx: %4d\ttype: %10d\tname: %s\n", 5441 ntlv->idx, ntlv->head.type, ntlv->name); 5442 else 5443 printf(" kidx: %4d\ttype: %10s\tname: %s\n", 5444 ntlv->idx, name, ntlv->name); 5445 ntlv++; 5446 } 5447 free(olh); 5448 } 5449 5450 void 5451 ipfw_internal_handler(int ac, char *av[]) 5452 { 5453 int tcmd; 5454 5455 ac--; av++; 5456 NEED1("internal cmd required"); 5457 5458 if ((tcmd = match_token(intcmds, *av)) == -1) 5459 errx(EX_USAGE, "invalid internal sub-cmd: %s", *av); 5460 5461 switch (tcmd) { 5462 case TOK_IFLIST: 5463 ipfw_list_tifaces(); 5464 break; 5465 case TOK_TALIST: 5466 ipfw_list_ta(ac, av); 5467 break; 5468 case TOK_OLIST: 5469 ipfw_list_objects(ac, av); 5470 break; 5471 case TOK_VLIST: 5472 ipfw_list_values(ac, av); 5473 break; 5474 } 5475 } 5476 5477 static int 5478 ipfw_get_tracked_ifaces(ipfw_obj_lheader **polh) 5479 { 5480 ipfw_obj_lheader req, *olh; 5481 size_t sz; 5482 5483 memset(&req, 0, sizeof(req)); 5484 sz = sizeof(req); 5485 5486 if (do_get3(IP_FW_XIFLIST, &req.opheader, &sz) != 0) { 5487 if (errno != ENOMEM) 5488 return (errno); 5489 } 5490 5491 sz = req.size; 5492 if ((olh = calloc(1, sz)) == NULL) 5493 return (ENOMEM); 5494 5495 olh->size = sz; 5496 if (do_get3(IP_FW_XIFLIST, &olh->opheader, &sz) != 0) { 5497 free(olh); 5498 return (errno); 5499 } 5500 5501 *polh = olh; 5502 return (0); 5503 } 5504 5505 static int 5506 ifinfo_cmp(const void *a, const void *b) 5507 { 5508 ipfw_iface_info *ia, *ib; 5509 5510 ia = (ipfw_iface_info *)a; 5511 ib = (ipfw_iface_info *)b; 5512 5513 return (stringnum_cmp(ia->ifname, ib->ifname)); 5514 } 5515 5516 /* 5517 * Retrieves table list from kernel, 5518 * optionally sorts it and calls requested function for each table. 5519 * Returns 0 on success. 5520 */ 5521 static void 5522 ipfw_list_tifaces() 5523 { 5524 ipfw_obj_lheader *olh; 5525 ipfw_iface_info *info; 5526 int i, error; 5527 5528 if ((error = ipfw_get_tracked_ifaces(&olh)) != 0) 5529 err(EX_OSERR, "Unable to request ipfw tracked interface list"); 5530 5531 5532 qsort(olh + 1, olh->count, olh->objsize, ifinfo_cmp); 5533 5534 info = (ipfw_iface_info *)(olh + 1); 5535 for (i = 0; i < olh->count; i++) { 5536 if (info->flags & IPFW_IFFLAG_RESOLVED) 5537 printf("%s ifindex: %d refcount: %u changes: %u\n", 5538 info->ifname, info->ifindex, info->refcnt, 5539 info->gencnt); 5540 else 5541 printf("%s ifindex: unresolved refcount: %u changes: %u\n", 5542 info->ifname, info->refcnt, info->gencnt); 5543 info = (ipfw_iface_info *)((caddr_t)info + olh->objsize); 5544 } 5545 5546 free(olh); 5547 } 5548 5549 5550 5551 5552