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 case O_IP_DST: 1470 case O_IP_DST_LOOKUP: 1471 case O_IP_DST_MASK: 1472 case O_IP_DST_ME: 1473 case O_IP_DST_SET: 1474 print_ip(bp, fo, insntod(cmd, ip)); 1475 break; 1476 case O_IP6_SRC: 1477 case O_IP6_SRC_MASK: 1478 case O_IP6_SRC_ME: 1479 case O_IP6_DST: 1480 case O_IP6_DST_MASK: 1481 case O_IP6_DST_ME: 1482 print_ip6(bp, insntod(cmd, ip6)); 1483 break; 1484 case O_FLOW6ID: 1485 print_flow6id(bp, insntod(cmd, u32)); 1486 break; 1487 case O_IP_DSTPORT: 1488 case O_IP_SRCPORT: 1489 print_newports(bp, insntod(cmd, u16), state->proto, 1490 (state->flags & (HAVE_SRCIP | HAVE_DSTIP)) == 1491 (HAVE_SRCIP | HAVE_DSTIP) ? cmd->opcode: 0); 1492 break; 1493 case O_PROTO: 1494 pe = getprotobynumber(cmd->arg1); 1495 if (state->flags & HAVE_PROTO) 1496 bprintf(bp, " proto"); 1497 if (pe != NULL) 1498 bprintf(bp, " %s", pe->p_name); 1499 else 1500 bprintf(bp, " %u", cmd->arg1); 1501 break; 1502 case O_MACADDR2: 1503 print_mac(bp, insntod(cmd, mac)); 1504 break; 1505 case O_MAC_TYPE: 1506 print_newports(bp, insntod(cmd, u16), 1507 IPPROTO_ETHERTYPE, cmd->opcode); 1508 break; 1509 case O_FRAG: 1510 bprintf(bp, " frag"); 1511 break; 1512 case O_FIB: 1513 bprintf(bp, " fib %u", cmd->arg1); 1514 break; 1515 case O_SOCKARG: 1516 bprintf(bp, " sockarg"); 1517 break; 1518 case O_IN: 1519 bprintf(bp, cmd->len & F_NOT ? " out" : " in"); 1520 break; 1521 case O_DIVERTED: 1522 switch (cmd->arg1) { 1523 case 3: 1524 bprintf(bp, " diverted"); 1525 break; 1526 case 2: 1527 bprintf(bp, " diverted-output"); 1528 break; 1529 case 1: 1530 bprintf(bp, " diverted-loopback"); 1531 break; 1532 default: 1533 bprintf(bp, " diverted-?<%u>", cmd->arg1); 1534 break; 1535 } 1536 break; 1537 case O_LAYER2: 1538 bprintf(bp, " layer2"); 1539 break; 1540 case O_XMIT: 1541 case O_RECV: 1542 case O_VIA: 1543 if (cmd->opcode == O_XMIT) 1544 s = "xmit"; 1545 else if (cmd->opcode == O_RECV) 1546 s = "recv"; 1547 else /* if (cmd->opcode == O_VIA) */ 1548 s = "via"; 1549 switch (insntod(cmd, if)->name[0]) { 1550 case '\0': 1551 bprintf(bp, " %s %s", s, 1552 inet_ntoa(insntod(cmd, if)->p.ip)); 1553 break; 1554 case '\1': 1555 bprintf(bp, " %s table(%s)", s, 1556 table_search_ctlv(fo->tstate, 1557 insntod(cmd, if)->p.kidx)); 1558 break; 1559 default: 1560 bprintf(bp, " %s %s", s, 1561 insntod(cmd, if)->name); 1562 } 1563 break; 1564 case O_IP_FLOW_LOOKUP: 1565 s = table_search_ctlv(fo->tstate, cmd->arg1); 1566 bprintf(bp, " flow table(%s", s); 1567 if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_u32)) 1568 bprintf(bp, ",%u", insntod(cmd, u32)->d[0]); 1569 bprintf(bp, ")"); 1570 break; 1571 case O_IPID: 1572 case O_IPTTL: 1573 case O_IPLEN: 1574 case O_TCPDATALEN: 1575 case O_TCPWIN: 1576 if (F_LEN(cmd) == 1) { 1577 switch (cmd->opcode) { 1578 case O_IPID: 1579 s = "ipid"; 1580 break; 1581 case O_IPTTL: 1582 s = "ipttl"; 1583 break; 1584 case O_IPLEN: 1585 s = "iplen"; 1586 break; 1587 case O_TCPDATALEN: 1588 s = "tcpdatalen"; 1589 break; 1590 case O_TCPWIN: 1591 s = "tcpwin"; 1592 break; 1593 } 1594 bprintf(bp, " %s %u", s, cmd->arg1); 1595 } else 1596 print_newports(bp, insntod(cmd, u16), 0, 1597 cmd->opcode); 1598 break; 1599 case O_IPVER: 1600 bprintf(bp, " ipver %u", cmd->arg1); 1601 break; 1602 case O_IPPRECEDENCE: 1603 bprintf(bp, " ipprecedence %u", cmd->arg1 >> 5); 1604 break; 1605 case O_DSCP: 1606 print_dscp(bp, insntod(cmd, u32)); 1607 break; 1608 case O_IPOPT: 1609 print_flags(bp, "ipoptions", cmd, f_ipopts); 1610 break; 1611 case O_IPTOS: 1612 print_flags(bp, "iptos", cmd, f_iptos); 1613 break; 1614 case O_ICMPTYPE: 1615 print_icmptypes(bp, insntod(cmd, u32)); 1616 break; 1617 case O_ESTAB: 1618 bprintf(bp, " established"); 1619 break; 1620 case O_TCPFLAGS: 1621 print_flags(bp, "tcpflags", cmd, f_tcpflags); 1622 break; 1623 case O_TCPOPTS: 1624 print_flags(bp, "tcpoptions", cmd, f_tcpopts); 1625 break; 1626 case O_TCPACK: 1627 bprintf(bp, " tcpack %d", 1628 ntohl(insntod(cmd, u32)->d[0])); 1629 break; 1630 case O_TCPSEQ: 1631 bprintf(bp, " tcpseq %d", 1632 ntohl(insntod(cmd, u32)->d[0])); 1633 break; 1634 case O_UID: 1635 pwd = getpwuid(insntod(cmd, u32)->d[0]); 1636 if (pwd != NULL) 1637 bprintf(bp, " uid %s", pwd->pw_name); 1638 else 1639 bprintf(bp, " uid %u", 1640 insntod(cmd, u32)->d[0]); 1641 break; 1642 case O_GID: 1643 grp = getgrgid(insntod(cmd, u32)->d[0]); 1644 if (grp != NULL) 1645 bprintf(bp, " gid %s", grp->gr_name); 1646 else 1647 bprintf(bp, " gid %u", 1648 insntod(cmd, u32)->d[0]); 1649 break; 1650 case O_JAIL: 1651 bprintf(bp, " jail %d", insntod(cmd, u32)->d[0]); 1652 break; 1653 case O_VERREVPATH: 1654 bprintf(bp, " verrevpath"); 1655 break; 1656 case O_VERSRCREACH: 1657 bprintf(bp, " versrcreach"); 1658 break; 1659 case O_ANTISPOOF: 1660 bprintf(bp, " antispoof"); 1661 break; 1662 case O_IPSEC: 1663 bprintf(bp, " ipsec"); 1664 break; 1665 case O_NOP: 1666 bprintf(bp, " // %s", (char *)(cmd + 1)); 1667 break; 1668 case O_KEEP_STATE: 1669 if (state->flags & HAVE_PROBE_STATE) 1670 bprintf(bp, " keep-state"); 1671 else 1672 bprintf(bp, " record-state"); 1673 bprintf(bp, " :%s", 1674 object_search_ctlv(fo->tstate, cmd->arg1, 1675 IPFW_TLV_STATE_NAME)); 1676 break; 1677 case O_LIMIT: 1678 if (state->flags & HAVE_PROBE_STATE) 1679 bprintf(bp, " limit"); 1680 else 1681 bprintf(bp, " set-limit"); 1682 print_limit_mask(bp, insntod(cmd, limit)); 1683 bprintf(bp, " :%s", 1684 object_search_ctlv(fo->tstate, cmd->arg1, 1685 IPFW_TLV_STATE_NAME)); 1686 break; 1687 case O_IP6: 1688 bprintf(bp, " ip6"); 1689 break; 1690 case O_IP4: 1691 bprintf(bp, " ip4"); 1692 break; 1693 case O_ICMP6TYPE: 1694 print_icmp6types(bp, insntod(cmd, u32)); 1695 break; 1696 case O_EXT_HDR: 1697 print_ext6hdr(bp, cmd); 1698 break; 1699 case O_TAGGED: 1700 if (F_LEN(cmd) == 1) 1701 bprint_uint_arg(bp, " tagged ", cmd->arg1); 1702 else 1703 print_newports(bp, insntod(cmd, u16), 1704 0, O_TAGGED); 1705 break; 1706 case O_SKIP_ACTION: 1707 bprintf(bp, " defer-immediate-action"); 1708 break; 1709 default: 1710 bprintf(bp, " [opcode %d len %d]", cmd->opcode, 1711 cmd->len); 1712 } 1713 if (cmd->len & F_OR) { 1714 bprintf(bp, " or"); 1715 state->or_block = 1; 1716 } else if (state->or_block != 0) { 1717 bprintf(bp, " }"); 1718 state->or_block = 0; 1719 } 1720 mark_printed(state, cmd); 1721 1722 return (1); 1723 } 1724 1725 static ipfw_insn * 1726 print_opcode(struct buf_pr *bp, struct format_opts *fo, 1727 struct show_state *state, int opcode) 1728 { 1729 ipfw_insn *cmd; 1730 int l; 1731 1732 for (l = state->rule->act_ofs, cmd = state->rule->cmd; 1733 l > 0; l -= F_LEN(cmd), cmd += F_LEN(cmd)) { 1734 /* We use zero opcode to print the rest of options */ 1735 if (opcode >= 0 && cmd->opcode != opcode) 1736 continue; 1737 /* 1738 * Skip O_NOP, when we printing the rest 1739 * of options, it will be handled separately. 1740 */ 1741 if (cmd->opcode == O_NOP && opcode != O_NOP) 1742 continue; 1743 if (!print_instruction(bp, fo, state, cmd)) 1744 continue; 1745 return (cmd); 1746 } 1747 return (NULL); 1748 } 1749 1750 static void 1751 print_fwd(struct buf_pr *bp, const ipfw_insn *cmd) 1752 { 1753 char buf[INET6_ADDRSTRLEN + IF_NAMESIZE + 2]; 1754 ipfw_insn_sa6 *sa6; 1755 ipfw_insn_sa *sa; 1756 uint16_t port; 1757 1758 if (cmd->opcode == O_FORWARD_IP) { 1759 sa = insntod(cmd, sa); 1760 port = sa->sa.sin_port; 1761 if (sa->sa.sin_addr.s_addr == INADDR_ANY) 1762 bprintf(bp, "fwd tablearg"); 1763 else 1764 bprintf(bp, "fwd %s", inet_ntoa(sa->sa.sin_addr)); 1765 } else { 1766 sa6 = insntod(cmd, sa6); 1767 port = sa6->sa.sin6_port; 1768 bprintf(bp, "fwd "); 1769 if (getnameinfo((const struct sockaddr *)&sa6->sa, 1770 sizeof(struct sockaddr_in6), buf, sizeof(buf), NULL, 0, 1771 NI_NUMERICHOST) == 0) 1772 bprintf(bp, "%s", buf); 1773 } 1774 if (port != 0) 1775 bprintf(bp, ",%u", port); 1776 } 1777 1778 static int 1779 print_action_instruction(struct buf_pr *bp, const struct format_opts *fo, 1780 struct show_state *state, const ipfw_insn *cmd) 1781 { 1782 const char *s; 1783 1784 if (is_printed_opcode(state, cmd)) 1785 return (0); 1786 switch (cmd->opcode) { 1787 case O_CHECK_STATE: 1788 bprintf(bp, "check-state"); 1789 if (cmd->arg1 != 0) 1790 s = object_search_ctlv(fo->tstate, cmd->arg1, 1791 IPFW_TLV_STATE_NAME); 1792 else 1793 s = NULL; 1794 bprintf(bp, " :%s", s ? s: "any"); 1795 break; 1796 case O_ACCEPT: 1797 bprintf(bp, "allow"); 1798 break; 1799 case O_COUNT: 1800 bprintf(bp, "count"); 1801 break; 1802 case O_DENY: 1803 bprintf(bp, "deny"); 1804 break; 1805 case O_REJECT: 1806 if (cmd->arg1 == ICMP_REJECT_RST) 1807 bprintf(bp, "reset"); 1808 else if (cmd->arg1 == ICMP_REJECT_ABORT) 1809 bprintf(bp, "abort"); 1810 else if (cmd->arg1 == ICMP_UNREACH_HOST) 1811 bprintf(bp, "reject"); 1812 else 1813 print_reject_code(bp, cmd->arg1); 1814 break; 1815 case O_UNREACH6: 1816 if (cmd->arg1 == ICMP6_UNREACH_RST) 1817 bprintf(bp, "reset6"); 1818 else if (cmd->arg1 == ICMP6_UNREACH_ABORT) 1819 bprintf(bp, "abort6"); 1820 else 1821 print_unreach6_code(bp, cmd->arg1); 1822 break; 1823 case O_SKIPTO: 1824 bprint_uint_arg(bp, "skipto ", cmd->arg1); 1825 break; 1826 case O_PIPE: 1827 bprint_uint_arg(bp, "pipe ", cmd->arg1); 1828 break; 1829 case O_QUEUE: 1830 bprint_uint_arg(bp, "queue ", cmd->arg1); 1831 break; 1832 case O_DIVERT: 1833 bprint_uint_arg(bp, "divert ", cmd->arg1); 1834 break; 1835 case O_TEE: 1836 bprint_uint_arg(bp, "tee ", cmd->arg1); 1837 break; 1838 case O_NETGRAPH: 1839 bprint_uint_arg(bp, "netgraph ", cmd->arg1); 1840 break; 1841 case O_NGTEE: 1842 bprint_uint_arg(bp, "ngtee ", cmd->arg1); 1843 break; 1844 case O_FORWARD_IP: 1845 case O_FORWARD_IP6: 1846 print_fwd(bp, cmd); 1847 break; 1848 case O_LOG: 1849 if (insntod(cmd, log)->max_log > 0) 1850 bprintf(bp, " log logamount %d", 1851 insntod(cmd, log)->max_log); 1852 else 1853 bprintf(bp, " log"); 1854 break; 1855 case O_ALTQ: 1856 #ifndef NO_ALTQ 1857 print_altq_cmd(bp, insntod(cmd, altq)); 1858 #endif 1859 break; 1860 case O_TAG: 1861 bprint_uint_arg(bp, cmd->len & F_NOT ? " untag ": 1862 " tag ", cmd->arg1); 1863 break; 1864 case O_NAT: 1865 if (cmd->arg1 != IP_FW_NAT44_GLOBAL) 1866 bprint_uint_arg(bp, "nat ", cmd->arg1); 1867 else 1868 bprintf(bp, "nat global"); 1869 break; 1870 case O_SETFIB: 1871 if (cmd->arg1 == IP_FW_TARG) 1872 bprint_uint_arg(bp, "setfib ", cmd->arg1); 1873 else 1874 bprintf(bp, "setfib %u", cmd->arg1 & 0x7FFF); 1875 break; 1876 case O_EXTERNAL_ACTION: 1877 /* 1878 * The external action can consists of two following 1879 * each other opcodes - O_EXTERNAL_ACTION and 1880 * O_EXTERNAL_INSTANCE. The first contains the ID of 1881 * name of external action. The second contains the ID 1882 * of name of external action instance. 1883 * NOTE: in case when external action has no named 1884 * instances support, the second opcode isn't needed. 1885 */ 1886 state->eaction = cmd; 1887 s = object_search_ctlv(fo->tstate, cmd->arg1, 1888 IPFW_TLV_EACTION); 1889 if (match_token(rule_eactions, s) != -1) 1890 bprintf(bp, "%s", s); 1891 else 1892 bprintf(bp, "eaction %s", s); 1893 break; 1894 case O_EXTERNAL_INSTANCE: 1895 if (state->eaction == NULL) 1896 break; 1897 /* 1898 * XXX: we need to teach ipfw(9) to rewrite opcodes 1899 * in the user buffer on rule addition. When we add 1900 * the rule, we specify zero TLV type for 1901 * O_EXTERNAL_INSTANCE object. To show correct 1902 * rule after `ipfw add` we need to search instance 1903 * name with zero type. But when we do `ipfw show` 1904 * we calculate TLV type using IPFW_TLV_EACTION_NAME() 1905 * macro. 1906 */ 1907 s = object_search_ctlv(fo->tstate, cmd->arg1, 0); 1908 if (s == NULL) 1909 s = object_search_ctlv(fo->tstate, 1910 cmd->arg1, IPFW_TLV_EACTION_NAME( 1911 state->eaction->arg1)); 1912 bprintf(bp, " %s", s); 1913 break; 1914 case O_EXTERNAL_DATA: 1915 if (state->eaction == NULL) 1916 break; 1917 /* 1918 * Currently we support data formatting only for 1919 * external data with datalen u16. For unknown data 1920 * print its size in bytes. 1921 */ 1922 if (cmd->len == F_INSN_SIZE(ipfw_insn)) 1923 bprintf(bp, " %u", cmd->arg1); 1924 else 1925 bprintf(bp, " %ubytes", 1926 cmd->len * sizeof(uint32_t)); 1927 break; 1928 case O_SETDSCP: 1929 if (cmd->arg1 == IP_FW_TARG) { 1930 bprintf(bp, "setdscp tablearg"); 1931 break; 1932 } 1933 s = match_value(f_ipdscp, cmd->arg1 & 0x3F); 1934 if (s != NULL) 1935 bprintf(bp, "setdscp %s", s); 1936 else 1937 bprintf(bp, "setdscp %s", cmd->arg1 & 0x3F); 1938 break; 1939 case O_REASS: 1940 bprintf(bp, "reass"); 1941 break; 1942 case O_CALLRETURN: 1943 if (cmd->len & F_NOT) 1944 bprintf(bp, "return"); 1945 else 1946 bprint_uint_arg(bp, "call ", cmd->arg1); 1947 break; 1948 default: 1949 bprintf(bp, "** unrecognized action %d len %d ", 1950 cmd->opcode, cmd->len); 1951 } 1952 mark_printed(state, cmd); 1953 1954 return (1); 1955 } 1956 1957 1958 static ipfw_insn * 1959 print_action(struct buf_pr *bp, struct format_opts *fo, 1960 struct show_state *state, uint8_t opcode) 1961 { 1962 ipfw_insn *cmd; 1963 int l; 1964 1965 for (l = state->rule->cmd_len - state->rule->act_ofs, 1966 cmd = ACTION_PTR(state->rule); l > 0; 1967 l -= F_LEN(cmd), cmd += F_LEN(cmd)) { 1968 if (cmd->opcode != opcode) 1969 continue; 1970 if (!print_action_instruction(bp, fo, state, cmd)) 1971 continue; 1972 return (cmd); 1973 } 1974 return (NULL); 1975 } 1976 1977 static void 1978 print_proto(struct buf_pr *bp, struct format_opts *fo, 1979 struct show_state *state) 1980 { 1981 ipfw_insn *cmd; 1982 int l, proto, ip4, ip6, tmp; 1983 1984 /* Count all O_PROTO, O_IP4, O_IP6 instructions. */ 1985 proto = tmp = ip4 = ip6 = 0; 1986 for (l = state->rule->act_ofs, cmd = state->rule->cmd; 1987 l > 0; l -= F_LEN(cmd), cmd += F_LEN(cmd)) { 1988 switch (cmd->opcode) { 1989 case O_PROTO: 1990 proto++; 1991 break; 1992 case O_IP4: 1993 ip4 = 1; 1994 if (cmd->len & F_OR) 1995 ip4++; 1996 break; 1997 case O_IP6: 1998 ip6 = 1; 1999 if (cmd->len & F_OR) 2000 ip6++; 2001 break; 2002 default: 2003 continue; 2004 } 2005 } 2006 if (proto == 0 && ip4 == 0 && ip6 == 0) { 2007 state->proto = IPPROTO_IP; 2008 state->flags |= HAVE_PROTO; 2009 bprintf(bp, " ip"); 2010 return; 2011 } 2012 /* To handle the case { ip4 or ip6 }, print opcode with F_OR first */ 2013 cmd = NULL; 2014 if (ip4 || ip6) 2015 cmd = print_opcode(bp, fo, state, ip4 > ip6 ? O_IP4: O_IP6); 2016 if (cmd != NULL && (cmd->len & F_OR)) 2017 cmd = print_opcode(bp, fo, state, ip4 > ip6 ? O_IP6: O_IP4); 2018 if (cmd == NULL || (cmd->len & F_OR)) 2019 for (l = proto; l > 0; l--) { 2020 cmd = print_opcode(bp, fo, state, O_PROTO); 2021 if (cmd != NULL && (cmd->len & F_OR) == 0) 2022 break; 2023 tmp = cmd->arg1; 2024 } 2025 /* Initialize proto, it is used by print_newports() */ 2026 if (tmp != 0) 2027 state->proto = tmp; 2028 else if (ip6 != 0) 2029 state->proto = IPPROTO_IPV6; 2030 else 2031 state->proto = IPPROTO_IP; 2032 state->flags |= HAVE_PROTO; 2033 } 2034 2035 static int 2036 match_opcode(int opcode, const int opcodes[], size_t nops) 2037 { 2038 int i; 2039 2040 for (i = 0; i < nops; i++) 2041 if (opcode == opcodes[i]) 2042 return (1); 2043 return (0); 2044 } 2045 2046 static void 2047 print_address(struct buf_pr *bp, struct format_opts *fo, 2048 struct show_state *state, const int opcodes[], size_t nops, int portop, 2049 int flag) 2050 { 2051 ipfw_insn *cmd; 2052 int count, l, portcnt, pf; 2053 2054 count = portcnt = 0; 2055 for (l = state->rule->act_ofs, cmd = state->rule->cmd; 2056 l > 0; l -= F_LEN(cmd), cmd += F_LEN(cmd)) { 2057 if (match_opcode(cmd->opcode, opcodes, nops)) 2058 count++; 2059 else if (cmd->opcode == portop) 2060 portcnt++; 2061 } 2062 if (count == 0) 2063 bprintf(bp, " any"); 2064 for (l = state->rule->act_ofs, cmd = state->rule->cmd; 2065 l > 0 && count > 0; l -= F_LEN(cmd), cmd += F_LEN(cmd)) { 2066 if (!match_opcode(cmd->opcode, opcodes, nops)) 2067 continue; 2068 print_instruction(bp, fo, state, cmd); 2069 if ((cmd->len & F_OR) == 0) 2070 break; 2071 count--; 2072 } 2073 /* 2074 * If several O_IP_?PORT opcodes specified, leave them to the 2075 * options section. 2076 */ 2077 if (portcnt == 1) { 2078 for (l = state->rule->act_ofs, cmd = state->rule->cmd, pf = 0; 2079 l > 0; l -= F_LEN(cmd), cmd += F_LEN(cmd)) { 2080 if (cmd->opcode != portop) { 2081 pf = (cmd->len & F_OR); 2082 continue; 2083 } 2084 /* Print opcode iff it is not in OR block. */ 2085 if (pf == 0 && (cmd->len & F_OR) == 0) 2086 print_instruction(bp, fo, state, cmd); 2087 break; 2088 } 2089 } 2090 state->flags |= flag; 2091 } 2092 2093 static const int action_opcodes[] = { 2094 O_CHECK_STATE, O_ACCEPT, O_COUNT, O_DENY, O_REJECT, 2095 O_UNREACH6, O_SKIPTO, O_PIPE, O_QUEUE, O_DIVERT, O_TEE, 2096 O_NETGRAPH, O_NGTEE, O_FORWARD_IP, O_FORWARD_IP6, O_NAT, 2097 O_SETFIB, O_SETDSCP, O_REASS, O_CALLRETURN, 2098 /* keep the following opcodes at the end of the list */ 2099 O_EXTERNAL_ACTION, O_EXTERNAL_INSTANCE, O_EXTERNAL_DATA 2100 }; 2101 2102 static const int modifier_opcodes[] = { 2103 O_LOG, O_ALTQ, O_TAG 2104 }; 2105 2106 static const int src_opcodes[] = { 2107 O_IP_SRC, O_IP_SRC_LOOKUP, O_IP_SRC_MASK, O_IP_SRC_ME, 2108 O_IP_SRC_SET, O_IP6_SRC, O_IP6_SRC_MASK, O_IP6_SRC_ME 2109 }; 2110 2111 static const int dst_opcodes[] = { 2112 O_IP_DST, O_IP_DST_LOOKUP, O_IP_DST_MASK, O_IP_DST_ME, 2113 O_IP_DST_SET, O_IP6_DST, O_IP6_DST_MASK, O_IP6_DST_ME 2114 }; 2115 2116 static void 2117 show_static_rule(struct cmdline_opts *co, struct format_opts *fo, 2118 struct buf_pr *bp, struct ip_fw_rule *rule, struct ip_fw_bcounter *cntr) 2119 { 2120 struct show_state state; 2121 ipfw_insn *cmd; 2122 static int twidth = 0; 2123 int i; 2124 2125 /* Print # DISABLED or skip the rule */ 2126 if ((fo->set_mask & (1 << rule->set)) == 0) { 2127 /* disabled mask */ 2128 if (!co->show_sets) 2129 return; 2130 else 2131 bprintf(bp, "# DISABLED "); 2132 } 2133 if (init_show_state(&state, rule) != 0) { 2134 warn("init_show_state() failed"); 2135 return; 2136 } 2137 bprintf(bp, "%05u ", rule->rulenum); 2138 2139 /* Print counters if enabled */ 2140 if (fo->pcwidth > 0 || fo->bcwidth > 0) { 2141 pr_u64(bp, &cntr->pcnt, fo->pcwidth); 2142 pr_u64(bp, &cntr->bcnt, fo->bcwidth); 2143 } 2144 2145 /* Print timestamp */ 2146 if (co->do_time == TIMESTAMP_NUMERIC) 2147 bprintf(bp, "%10u ", cntr->timestamp); 2148 else if (co->do_time == TIMESTAMP_STRING) { 2149 char timestr[30]; 2150 time_t t = (time_t)0; 2151 2152 if (twidth == 0) { 2153 strcpy(timestr, ctime(&t)); 2154 *strchr(timestr, '\n') = '\0'; 2155 twidth = strlen(timestr); 2156 } 2157 if (cntr->timestamp > 0) { 2158 t = _long_to_time(cntr->timestamp); 2159 2160 strcpy(timestr, ctime(&t)); 2161 *strchr(timestr, '\n') = '\0'; 2162 bprintf(bp, "%s ", timestr); 2163 } else { 2164 bprintf(bp, "%*s", twidth, " "); 2165 } 2166 } 2167 2168 /* Print set number */ 2169 if (co->show_sets) 2170 bprintf(bp, "set %d ", rule->set); 2171 2172 /* Print the optional "match probability" */ 2173 cmd = print_opcode(bp, fo, &state, O_PROB); 2174 /* Print rule action */ 2175 for (i = 0; i < nitems(action_opcodes); i++) { 2176 cmd = print_action(bp, fo, &state, action_opcodes[i]); 2177 if (cmd == NULL) 2178 continue; 2179 /* Handle special cases */ 2180 switch (cmd->opcode) { 2181 case O_CHECK_STATE: 2182 goto end; 2183 case O_EXTERNAL_ACTION: 2184 case O_EXTERNAL_INSTANCE: 2185 /* External action can have several instructions */ 2186 continue; 2187 } 2188 break; 2189 } 2190 /* Print rule modifiers */ 2191 for (i = 0; i < nitems(modifier_opcodes); i++) 2192 print_action(bp, fo, &state, modifier_opcodes[i]); 2193 /* 2194 * Print rule body 2195 */ 2196 if (co->comment_only != 0) 2197 goto end; 2198 print_proto(bp, fo, &state); 2199 2200 /* Print source */ 2201 bprintf(bp, " from"); 2202 print_address(bp, fo, &state, src_opcodes, nitems(src_opcodes), 2203 O_IP_SRCPORT, HAVE_SRCIP); 2204 2205 /* Print destination */ 2206 bprintf(bp, " to"); 2207 print_address(bp, fo, &state, dst_opcodes, nitems(dst_opcodes), 2208 O_IP_DSTPORT, HAVE_DSTIP); 2209 2210 /* Print the rest of options */ 2211 while (print_opcode(bp, fo, &state, -1)) 2212 ; 2213 end: 2214 /* Print comment at the end */ 2215 cmd = print_opcode(bp, fo, &state, O_NOP); 2216 if (co->comment_only != 0 && cmd == NULL) 2217 bprintf(bp, " // ..."); 2218 bprintf(bp, "\n"); 2219 free_show_state(&state); 2220 } 2221 2222 static void 2223 show_dyn_state(struct cmdline_opts *co, struct format_opts *fo, 2224 struct buf_pr *bp, ipfw_dyn_rule *d) 2225 { 2226 struct protoent *pe; 2227 struct in_addr a; 2228 uint16_t rulenum; 2229 char buf[INET6_ADDRSTRLEN]; 2230 2231 if (!co->do_expired) { 2232 if (!d->expire && !(d->dyn_type == O_LIMIT_PARENT)) 2233 return; 2234 } 2235 bcopy(&d->rule, &rulenum, sizeof(rulenum)); 2236 bprintf(bp, "%05d", rulenum); 2237 if (fo->pcwidth > 0 || fo->bcwidth > 0) { 2238 bprintf(bp, " "); 2239 pr_u64(bp, &d->pcnt, fo->pcwidth); 2240 pr_u64(bp, &d->bcnt, fo->bcwidth); 2241 bprintf(bp, "(%ds)", d->expire); 2242 } 2243 switch (d->dyn_type) { 2244 case O_LIMIT_PARENT: 2245 bprintf(bp, " PARENT %d", d->count); 2246 break; 2247 case O_LIMIT: 2248 bprintf(bp, " LIMIT"); 2249 break; 2250 case O_KEEP_STATE: /* bidir, no mask */ 2251 bprintf(bp, " STATE"); 2252 break; 2253 } 2254 2255 if ((pe = getprotobynumber(d->id.proto)) != NULL) 2256 bprintf(bp, " %s", pe->p_name); 2257 else 2258 bprintf(bp, " proto %u", d->id.proto); 2259 2260 if (d->id.addr_type == 4) { 2261 a.s_addr = htonl(d->id.src_ip); 2262 bprintf(bp, " %s %d", inet_ntoa(a), d->id.src_port); 2263 2264 a.s_addr = htonl(d->id.dst_ip); 2265 bprintf(bp, " <-> %s %d", inet_ntoa(a), d->id.dst_port); 2266 } else if (d->id.addr_type == 6) { 2267 bprintf(bp, " %s %d", inet_ntop(AF_INET6, &d->id.src_ip6, buf, 2268 sizeof(buf)), d->id.src_port); 2269 bprintf(bp, " <-> %s %d", inet_ntop(AF_INET6, &d->id.dst_ip6, 2270 buf, sizeof(buf)), d->id.dst_port); 2271 } else 2272 bprintf(bp, " UNKNOWN <-> UNKNOWN"); 2273 if (d->kidx != 0) 2274 bprintf(bp, " :%s", object_search_ctlv(fo->tstate, 2275 d->kidx, IPFW_TLV_STATE_NAME)); 2276 } 2277 2278 static int 2279 do_range_cmd(int cmd, ipfw_range_tlv *rt) 2280 { 2281 ipfw_range_header rh; 2282 size_t sz; 2283 2284 memset(&rh, 0, sizeof(rh)); 2285 memcpy(&rh.range, rt, sizeof(*rt)); 2286 rh.range.head.length = sizeof(*rt); 2287 rh.range.head.type = IPFW_TLV_RANGE; 2288 sz = sizeof(rh); 2289 2290 if (do_get3(cmd, &rh.opheader, &sz) != 0) 2291 return (-1); 2292 /* Save number of matched objects */ 2293 rt->new_set = rh.range.new_set; 2294 return (0); 2295 } 2296 2297 /* 2298 * This one handles all set-related commands 2299 * ipfw set { show | enable | disable } 2300 * ipfw set swap X Y 2301 * ipfw set move X to Y 2302 * ipfw set move rule X to Y 2303 */ 2304 void 2305 ipfw_sets_handler(char *av[]) 2306 { 2307 ipfw_range_tlv rt; 2308 char *msg; 2309 size_t size; 2310 uint32_t masks[2]; 2311 int i; 2312 uint16_t rulenum; 2313 uint8_t cmd; 2314 2315 av++; 2316 memset(&rt, 0, sizeof(rt)); 2317 2318 if (av[0] == NULL) 2319 errx(EX_USAGE, "set needs command"); 2320 if (_substrcmp(*av, "show") == 0) { 2321 struct format_opts fo; 2322 ipfw_cfg_lheader *cfg; 2323 2324 memset(&fo, 0, sizeof(fo)); 2325 if (ipfw_get_config(&co, &fo, &cfg, &size) != 0) 2326 err(EX_OSERR, "requesting config failed"); 2327 2328 for (i = 0, msg = "disable"; i < RESVD_SET; i++) 2329 if ((cfg->set_mask & (1<<i)) == 0) { 2330 printf("%s %d", msg, i); 2331 msg = ""; 2332 } 2333 msg = (cfg->set_mask != (uint32_t)-1) ? " enable" : "enable"; 2334 for (i = 0; i < RESVD_SET; i++) 2335 if ((cfg->set_mask & (1<<i)) != 0) { 2336 printf("%s %d", msg, i); 2337 msg = ""; 2338 } 2339 printf("\n"); 2340 free(cfg); 2341 } else if (_substrcmp(*av, "swap") == 0) { 2342 av++; 2343 if ( av[0] == NULL || av[1] == NULL ) 2344 errx(EX_USAGE, "set swap needs 2 set numbers\n"); 2345 rt.set = atoi(av[0]); 2346 rt.new_set = atoi(av[1]); 2347 if (!isdigit(*(av[0])) || rt.set > RESVD_SET) 2348 errx(EX_DATAERR, "invalid set number %s\n", av[0]); 2349 if (!isdigit(*(av[1])) || rt.new_set > RESVD_SET) 2350 errx(EX_DATAERR, "invalid set number %s\n", av[1]); 2351 i = do_range_cmd(IP_FW_SET_SWAP, &rt); 2352 } else if (_substrcmp(*av, "move") == 0) { 2353 av++; 2354 if (av[0] && _substrcmp(*av, "rule") == 0) { 2355 rt.flags = IPFW_RCFLAG_RANGE; /* move rules to new set */ 2356 cmd = IP_FW_XMOVE; 2357 av++; 2358 } else 2359 cmd = IP_FW_SET_MOVE; /* Move set to new one */ 2360 if (av[0] == NULL || av[1] == NULL || av[2] == NULL || 2361 av[3] != NULL || _substrcmp(av[1], "to") != 0) 2362 errx(EX_USAGE, "syntax: set move [rule] X to Y\n"); 2363 rulenum = atoi(av[0]); 2364 rt.new_set = atoi(av[2]); 2365 if (cmd == IP_FW_XMOVE) { 2366 rt.start_rule = rulenum; 2367 rt.end_rule = rulenum; 2368 } else 2369 rt.set = rulenum; 2370 rt.new_set = atoi(av[2]); 2371 if (!isdigit(*(av[0])) || (cmd == 3 && rt.set > RESVD_SET) || 2372 (cmd == 2 && rt.start_rule == IPFW_DEFAULT_RULE) ) 2373 errx(EX_DATAERR, "invalid source number %s\n", av[0]); 2374 if (!isdigit(*(av[2])) || rt.new_set > RESVD_SET) 2375 errx(EX_DATAERR, "invalid dest. set %s\n", av[1]); 2376 i = do_range_cmd(cmd, &rt); 2377 if (i < 0) 2378 err(EX_OSERR, "failed to move %s", 2379 cmd == IP_FW_SET_MOVE ? "set": "rule"); 2380 } else if (_substrcmp(*av, "disable") == 0 || 2381 _substrcmp(*av, "enable") == 0 ) { 2382 int which = _substrcmp(*av, "enable") == 0 ? 1 : 0; 2383 2384 av++; 2385 masks[0] = masks[1] = 0; 2386 2387 while (av[0]) { 2388 if (isdigit(**av)) { 2389 i = atoi(*av); 2390 if (i < 0 || i > RESVD_SET) 2391 errx(EX_DATAERR, 2392 "invalid set number %d\n", i); 2393 masks[which] |= (1<<i); 2394 } else if (_substrcmp(*av, "disable") == 0) 2395 which = 0; 2396 else if (_substrcmp(*av, "enable") == 0) 2397 which = 1; 2398 else 2399 errx(EX_DATAERR, 2400 "invalid set command %s\n", *av); 2401 av++; 2402 } 2403 if ( (masks[0] & masks[1]) != 0 ) 2404 errx(EX_DATAERR, 2405 "cannot enable and disable the same set\n"); 2406 2407 rt.set = masks[0]; 2408 rt.new_set = masks[1]; 2409 i = do_range_cmd(IP_FW_SET_ENABLE, &rt); 2410 if (i) 2411 warn("set enable/disable: setsockopt(IP_FW_SET_ENABLE)"); 2412 } else 2413 errx(EX_USAGE, "invalid set command %s\n", *av); 2414 } 2415 2416 void 2417 ipfw_sysctl_handler(char *av[], int which) 2418 { 2419 av++; 2420 2421 if (av[0] == NULL) { 2422 warnx("missing keyword to enable/disable\n"); 2423 } else if (_substrcmp(*av, "firewall") == 0) { 2424 sysctlbyname("net.inet.ip.fw.enable", NULL, 0, 2425 &which, sizeof(which)); 2426 sysctlbyname("net.inet6.ip6.fw.enable", NULL, 0, 2427 &which, sizeof(which)); 2428 } else if (_substrcmp(*av, "one_pass") == 0) { 2429 sysctlbyname("net.inet.ip.fw.one_pass", NULL, 0, 2430 &which, sizeof(which)); 2431 } else if (_substrcmp(*av, "debug") == 0) { 2432 sysctlbyname("net.inet.ip.fw.debug", NULL, 0, 2433 &which, sizeof(which)); 2434 } else if (_substrcmp(*av, "verbose") == 0) { 2435 sysctlbyname("net.inet.ip.fw.verbose", NULL, 0, 2436 &which, sizeof(which)); 2437 } else if (_substrcmp(*av, "dyn_keepalive") == 0) { 2438 sysctlbyname("net.inet.ip.fw.dyn_keepalive", NULL, 0, 2439 &which, sizeof(which)); 2440 #ifndef NO_ALTQ 2441 } else if (_substrcmp(*av, "altq") == 0) { 2442 altq_set_enabled(which); 2443 #endif 2444 } else { 2445 warnx("unrecognize enable/disable keyword: %s\n", *av); 2446 } 2447 } 2448 2449 typedef void state_cb(struct cmdline_opts *co, struct format_opts *fo, 2450 void *arg, void *state); 2451 2452 static void 2453 prepare_format_dyn(struct cmdline_opts *co, struct format_opts *fo, 2454 void *arg, void *_state) 2455 { 2456 ipfw_dyn_rule *d; 2457 int width; 2458 uint8_t set; 2459 2460 d = (ipfw_dyn_rule *)_state; 2461 /* Count _ALL_ states */ 2462 fo->dcnt++; 2463 2464 if (fo->show_counters == 0) 2465 return; 2466 2467 if (co->use_set) { 2468 /* skip states from another set */ 2469 bcopy((char *)&d->rule + sizeof(uint16_t), &set, 2470 sizeof(uint8_t)); 2471 if (set != co->use_set - 1) 2472 return; 2473 } 2474 2475 width = pr_u64(NULL, &d->pcnt, 0); 2476 if (width > fo->pcwidth) 2477 fo->pcwidth = width; 2478 2479 width = pr_u64(NULL, &d->bcnt, 0); 2480 if (width > fo->bcwidth) 2481 fo->bcwidth = width; 2482 } 2483 2484 static int 2485 foreach_state(struct cmdline_opts *co, struct format_opts *fo, 2486 caddr_t base, size_t sz, state_cb dyn_bc, void *dyn_arg) 2487 { 2488 int ttype; 2489 state_cb *fptr; 2490 void *farg; 2491 ipfw_obj_tlv *tlv; 2492 ipfw_obj_ctlv *ctlv; 2493 2494 fptr = NULL; 2495 ttype = 0; 2496 2497 while (sz > 0) { 2498 ctlv = (ipfw_obj_ctlv *)base; 2499 switch (ctlv->head.type) { 2500 case IPFW_TLV_DYNSTATE_LIST: 2501 base += sizeof(*ctlv); 2502 sz -= sizeof(*ctlv); 2503 ttype = IPFW_TLV_DYN_ENT; 2504 fptr = dyn_bc; 2505 farg = dyn_arg; 2506 break; 2507 default: 2508 return (sz); 2509 } 2510 2511 while (sz > 0) { 2512 tlv = (ipfw_obj_tlv *)base; 2513 if (tlv->type != ttype) 2514 break; 2515 2516 fptr(co, fo, farg, tlv + 1); 2517 sz -= tlv->length; 2518 base += tlv->length; 2519 } 2520 } 2521 2522 return (sz); 2523 } 2524 2525 static void 2526 prepare_format_opts(struct cmdline_opts *co, struct format_opts *fo, 2527 ipfw_obj_tlv *rtlv, int rcnt, caddr_t dynbase, size_t dynsz) 2528 { 2529 int bcwidth, pcwidth, width; 2530 int n; 2531 struct ip_fw_bcounter *cntr; 2532 struct ip_fw_rule *r; 2533 2534 bcwidth = 0; 2535 pcwidth = 0; 2536 if (fo->show_counters != 0) { 2537 for (n = 0; n < rcnt; n++, 2538 rtlv = (ipfw_obj_tlv *)((caddr_t)rtlv + rtlv->length)) { 2539 cntr = (struct ip_fw_bcounter *)(rtlv + 1); 2540 r = (struct ip_fw_rule *)((caddr_t)cntr + cntr->size); 2541 /* skip rules from another set */ 2542 if (co->use_set && r->set != co->use_set - 1) 2543 continue; 2544 2545 /* packet counter */ 2546 width = pr_u64(NULL, &cntr->pcnt, 0); 2547 if (width > pcwidth) 2548 pcwidth = width; 2549 2550 /* byte counter */ 2551 width = pr_u64(NULL, &cntr->bcnt, 0); 2552 if (width > bcwidth) 2553 bcwidth = width; 2554 } 2555 } 2556 fo->bcwidth = bcwidth; 2557 fo->pcwidth = pcwidth; 2558 2559 fo->dcnt = 0; 2560 if (co->do_dynamic && dynsz > 0) 2561 foreach_state(co, fo, dynbase, dynsz, prepare_format_dyn, NULL); 2562 } 2563 2564 static int 2565 list_static_range(struct cmdline_opts *co, struct format_opts *fo, 2566 struct buf_pr *bp, ipfw_obj_tlv *rtlv, int rcnt) 2567 { 2568 int n, seen; 2569 struct ip_fw_rule *r; 2570 struct ip_fw_bcounter *cntr; 2571 int c = 0; 2572 2573 for (n = seen = 0; n < rcnt; n++, 2574 rtlv = (ipfw_obj_tlv *)((caddr_t)rtlv + rtlv->length)) { 2575 2576 if ((fo->show_counters | fo->show_time) != 0) { 2577 cntr = (struct ip_fw_bcounter *)(rtlv + 1); 2578 r = (struct ip_fw_rule *)((caddr_t)cntr + cntr->size); 2579 } else { 2580 cntr = NULL; 2581 r = (struct ip_fw_rule *)(rtlv + 1); 2582 } 2583 if (r->rulenum > fo->last) 2584 break; 2585 if (co->use_set && r->set != co->use_set - 1) 2586 continue; 2587 if (r->rulenum >= fo->first && r->rulenum <= fo->last) { 2588 show_static_rule(co, fo, bp, r, cntr); 2589 printf("%s", bp->buf); 2590 c += rtlv->length; 2591 bp_flush(bp); 2592 seen++; 2593 } 2594 } 2595 2596 return (seen); 2597 } 2598 2599 static void 2600 list_dyn_state(struct cmdline_opts *co, struct format_opts *fo, 2601 void *_arg, void *_state) 2602 { 2603 uint16_t rulenum; 2604 uint8_t set; 2605 ipfw_dyn_rule *d; 2606 struct buf_pr *bp; 2607 2608 d = (ipfw_dyn_rule *)_state; 2609 bp = (struct buf_pr *)_arg; 2610 2611 bcopy(&d->rule, &rulenum, sizeof(rulenum)); 2612 if (rulenum > fo->last) 2613 return; 2614 if (co->use_set) { 2615 bcopy((char *)&d->rule + sizeof(uint16_t), 2616 &set, sizeof(uint8_t)); 2617 if (set != co->use_set - 1) 2618 return; 2619 } 2620 if (rulenum >= fo->first) { 2621 show_dyn_state(co, fo, bp, d); 2622 printf("%s\n", bp->buf); 2623 bp_flush(bp); 2624 } 2625 } 2626 2627 static int 2628 list_dyn_range(struct cmdline_opts *co, struct format_opts *fo, 2629 struct buf_pr *bp, caddr_t base, size_t sz) 2630 { 2631 2632 sz = foreach_state(co, fo, base, sz, list_dyn_state, bp); 2633 return (sz); 2634 } 2635 2636 void 2637 ipfw_list(int ac, char *av[], int show_counters) 2638 { 2639 ipfw_cfg_lheader *cfg; 2640 struct format_opts sfo; 2641 size_t sz; 2642 int error; 2643 int lac; 2644 char **lav; 2645 uint32_t rnum; 2646 char *endptr; 2647 2648 if (co.test_only) { 2649 fprintf(stderr, "Testing only, list disabled\n"); 2650 return; 2651 } 2652 if (co.do_pipe) { 2653 dummynet_list(ac, av, show_counters); 2654 return; 2655 } 2656 2657 ac--; 2658 av++; 2659 memset(&sfo, 0, sizeof(sfo)); 2660 2661 /* Determine rule range to request */ 2662 if (ac > 0) { 2663 for (lac = ac, lav = av; lac != 0; lac--) { 2664 rnum = strtoul(*lav++, &endptr, 10); 2665 if (sfo.first == 0 || rnum < sfo.first) 2666 sfo.first = rnum; 2667 2668 if (*endptr == '-') 2669 rnum = strtoul(endptr + 1, &endptr, 10); 2670 if (sfo.last == 0 || rnum > sfo.last) 2671 sfo.last = rnum; 2672 } 2673 } 2674 2675 /* get configuraion from kernel */ 2676 cfg = NULL; 2677 sfo.show_counters = show_counters; 2678 sfo.show_time = co.do_time; 2679 sfo.flags = IPFW_CFG_GET_STATIC; 2680 if (co.do_dynamic != 0) 2681 sfo.flags |= IPFW_CFG_GET_STATES; 2682 if ((sfo.show_counters | sfo.show_time) != 0) 2683 sfo.flags |= IPFW_CFG_GET_COUNTERS; 2684 if (ipfw_get_config(&co, &sfo, &cfg, &sz) != 0) 2685 err(EX_OSERR, "retrieving config failed"); 2686 2687 error = ipfw_show_config(&co, &sfo, cfg, sz, ac, av); 2688 2689 free(cfg); 2690 2691 if (error != EX_OK) 2692 exit(error); 2693 } 2694 2695 static int 2696 ipfw_show_config(struct cmdline_opts *co, struct format_opts *fo, 2697 ipfw_cfg_lheader *cfg, size_t sz, int ac, char *av[]) 2698 { 2699 caddr_t dynbase; 2700 size_t dynsz; 2701 int rcnt; 2702 int exitval = EX_OK; 2703 int lac; 2704 char **lav; 2705 char *endptr; 2706 size_t readsz; 2707 struct buf_pr bp; 2708 ipfw_obj_ctlv *ctlv, *tstate; 2709 ipfw_obj_tlv *rbase; 2710 2711 /* 2712 * Handle tablenames TLV first, if any 2713 */ 2714 tstate = NULL; 2715 rbase = NULL; 2716 dynbase = NULL; 2717 dynsz = 0; 2718 readsz = sizeof(*cfg); 2719 rcnt = 0; 2720 2721 fo->set_mask = cfg->set_mask; 2722 2723 ctlv = (ipfw_obj_ctlv *)(cfg + 1); 2724 2725 if (cfg->flags & IPFW_CFG_GET_STATIC) { 2726 /* We've requested static rules */ 2727 if (ctlv->head.type == IPFW_TLV_TBLNAME_LIST) { 2728 object_sort_ctlv(ctlv); 2729 fo->tstate = ctlv; 2730 readsz += ctlv->head.length; 2731 ctlv = (ipfw_obj_ctlv *)((caddr_t)ctlv + 2732 ctlv->head.length); 2733 } 2734 2735 if (ctlv->head.type == IPFW_TLV_RULE_LIST) { 2736 rbase = (ipfw_obj_tlv *)(ctlv + 1); 2737 rcnt = ctlv->count; 2738 readsz += ctlv->head.length; 2739 ctlv = (ipfw_obj_ctlv *)((caddr_t)ctlv + 2740 ctlv->head.length); 2741 } 2742 } 2743 2744 if ((cfg->flags & IPFW_CFG_GET_STATES) && (readsz != sz)) { 2745 /* We may have some dynamic states */ 2746 dynsz = sz - readsz; 2747 /* Skip empty header */ 2748 if (dynsz != sizeof(ipfw_obj_ctlv)) 2749 dynbase = (caddr_t)ctlv; 2750 else 2751 dynsz = 0; 2752 } 2753 2754 prepare_format_opts(co, fo, rbase, rcnt, dynbase, dynsz); 2755 bp_alloc(&bp, 4096); 2756 2757 /* if no rule numbers were specified, list all rules */ 2758 if (ac == 0) { 2759 fo->first = 0; 2760 fo->last = IPFW_DEFAULT_RULE; 2761 list_static_range(co, fo, &bp, rbase, rcnt); 2762 2763 if (co->do_dynamic && dynsz > 0) { 2764 printf("## Dynamic rules (%d %zu):\n", fo->dcnt, dynsz); 2765 list_dyn_range(co, fo, &bp, dynbase, dynsz); 2766 } 2767 2768 bp_free(&bp); 2769 return (EX_OK); 2770 } 2771 2772 /* display specific rules requested on command line */ 2773 for (lac = ac, lav = av; lac != 0; lac--) { 2774 /* convert command line rule # */ 2775 fo->last = fo->first = strtoul(*lav++, &endptr, 10); 2776 if (*endptr == '-') 2777 fo->last = strtoul(endptr + 1, &endptr, 10); 2778 if (*endptr) { 2779 exitval = EX_USAGE; 2780 warnx("invalid rule number: %s", *(lav - 1)); 2781 continue; 2782 } 2783 2784 if (list_static_range(co, fo, &bp, rbase, rcnt) == 0) { 2785 /* give precedence to other error(s) */ 2786 if (exitval == EX_OK) 2787 exitval = EX_UNAVAILABLE; 2788 if (fo->first == fo->last) 2789 warnx("rule %u does not exist", fo->first); 2790 else 2791 warnx("no rules in range %u-%u", 2792 fo->first, fo->last); 2793 } 2794 } 2795 2796 if (co->do_dynamic && dynsz > 0) { 2797 printf("## Dynamic rules:\n"); 2798 for (lac = ac, lav = av; lac != 0; lac--) { 2799 fo->last = fo->first = strtoul(*lav++, &endptr, 10); 2800 if (*endptr == '-') 2801 fo->last = strtoul(endptr+1, &endptr, 10); 2802 if (*endptr) 2803 /* already warned */ 2804 continue; 2805 list_dyn_range(co, fo, &bp, dynbase, dynsz); 2806 } 2807 } 2808 2809 bp_free(&bp); 2810 return (exitval); 2811 } 2812 2813 2814 /* 2815 * Retrieves current ipfw configuration of given type 2816 * and stores its pointer to @pcfg. 2817 * 2818 * Caller is responsible for freeing @pcfg. 2819 * 2820 * Returns 0 on success. 2821 */ 2822 2823 static int 2824 ipfw_get_config(struct cmdline_opts *co, struct format_opts *fo, 2825 ipfw_cfg_lheader **pcfg, size_t *psize) 2826 { 2827 ipfw_cfg_lheader *cfg; 2828 size_t sz; 2829 int i; 2830 2831 2832 if (co->test_only != 0) { 2833 fprintf(stderr, "Testing only, list disabled\n"); 2834 return (0); 2835 } 2836 2837 /* Start with some data size */ 2838 sz = 4096; 2839 cfg = NULL; 2840 2841 for (i = 0; i < 16; i++) { 2842 if (cfg != NULL) 2843 free(cfg); 2844 if ((cfg = calloc(1, sz)) == NULL) 2845 return (ENOMEM); 2846 2847 cfg->flags = fo->flags; 2848 cfg->start_rule = fo->first; 2849 cfg->end_rule = fo->last; 2850 2851 if (do_get3(IP_FW_XGET, &cfg->opheader, &sz) != 0) { 2852 if (errno != ENOMEM) { 2853 free(cfg); 2854 return (errno); 2855 } 2856 2857 /* Buffer size is not enough. Try to increase */ 2858 sz = sz * 2; 2859 if (sz < cfg->size) 2860 sz = cfg->size; 2861 continue; 2862 } 2863 2864 *pcfg = cfg; 2865 *psize = sz; 2866 return (0); 2867 } 2868 2869 free(cfg); 2870 return (ENOMEM); 2871 } 2872 2873 static int 2874 lookup_host (char *host, struct in_addr *ipaddr) 2875 { 2876 struct hostent *he; 2877 2878 if (!inet_aton(host, ipaddr)) { 2879 if ((he = gethostbyname(host)) == NULL) 2880 return(-1); 2881 *ipaddr = *(struct in_addr *)he->h_addr_list[0]; 2882 } 2883 return(0); 2884 } 2885 2886 struct tidx { 2887 ipfw_obj_ntlv *idx; 2888 uint32_t count; 2889 uint32_t size; 2890 uint16_t counter; 2891 uint8_t set; 2892 }; 2893 2894 int 2895 ipfw_check_object_name(const char *name) 2896 { 2897 int c, i, l; 2898 2899 /* 2900 * Check that name is null-terminated and contains 2901 * valid symbols only. Valid mask is: 2902 * [a-zA-Z0-9\-_\.]{1,63} 2903 */ 2904 l = strlen(name); 2905 if (l == 0 || l >= 64) 2906 return (EINVAL); 2907 for (i = 0; i < l; i++) { 2908 c = name[i]; 2909 if (isalpha(c) || isdigit(c) || c == '_' || 2910 c == '-' || c == '.') 2911 continue; 2912 return (EINVAL); 2913 } 2914 return (0); 2915 } 2916 2917 static char *default_state_name = "default"; 2918 static int 2919 state_check_name(const char *name) 2920 { 2921 2922 if (ipfw_check_object_name(name) != 0) 2923 return (EINVAL); 2924 if (strcmp(name, "any") == 0) 2925 return (EINVAL); 2926 return (0); 2927 } 2928 2929 static int 2930 eaction_check_name(const char *name) 2931 { 2932 2933 if (ipfw_check_object_name(name) != 0) 2934 return (EINVAL); 2935 /* Restrict some 'special' names */ 2936 if (match_token(rule_actions, name) != -1 && 2937 match_token(rule_action_params, name) != -1) 2938 return (EINVAL); 2939 return (0); 2940 } 2941 2942 static uint16_t 2943 pack_object(struct tidx *tstate, char *name, int otype) 2944 { 2945 int i; 2946 ipfw_obj_ntlv *ntlv; 2947 2948 for (i = 0; i < tstate->count; i++) { 2949 if (strcmp(tstate->idx[i].name, name) != 0) 2950 continue; 2951 if (tstate->idx[i].set != tstate->set) 2952 continue; 2953 if (tstate->idx[i].head.type != otype) 2954 continue; 2955 2956 return (tstate->idx[i].idx); 2957 } 2958 2959 if (tstate->count + 1 > tstate->size) { 2960 tstate->size += 4; 2961 tstate->idx = realloc(tstate->idx, tstate->size * 2962 sizeof(ipfw_obj_ntlv)); 2963 if (tstate->idx == NULL) 2964 return (0); 2965 } 2966 2967 ntlv = &tstate->idx[i]; 2968 memset(ntlv, 0, sizeof(ipfw_obj_ntlv)); 2969 strlcpy(ntlv->name, name, sizeof(ntlv->name)); 2970 ntlv->head.type = otype; 2971 ntlv->head.length = sizeof(ipfw_obj_ntlv); 2972 ntlv->set = tstate->set; 2973 ntlv->idx = ++tstate->counter; 2974 tstate->count++; 2975 2976 return (ntlv->idx); 2977 } 2978 2979 static uint16_t 2980 pack_table(struct tidx *tstate, char *name) 2981 { 2982 2983 if (table_check_name(name) != 0) 2984 return (0); 2985 2986 return (pack_object(tstate, name, IPFW_TLV_TBL_NAME)); 2987 } 2988 2989 void 2990 fill_table(struct _ipfw_insn *cmd, char *av, uint8_t opcode, 2991 struct tidx *tstate) 2992 { 2993 uint32_t *d = ((ipfw_insn_u32 *)cmd)->d; 2994 uint16_t uidx; 2995 char *p; 2996 2997 if ((p = strchr(av + 6, ')')) == NULL) 2998 errx(EX_DATAERR, "forgotten parenthesis: '%s'", av); 2999 *p = '\0'; 3000 p = strchr(av + 6, ','); 3001 if (p) 3002 *p++ = '\0'; 3003 3004 if ((uidx = pack_table(tstate, av + 6)) == 0) 3005 errx(EX_DATAERR, "Invalid table name: %s", av + 6); 3006 3007 cmd->opcode = opcode; 3008 cmd->arg1 = uidx; 3009 if (p) { 3010 cmd->len |= F_INSN_SIZE(ipfw_insn_u32); 3011 d[0] = strtoul(p, NULL, 0); 3012 } else 3013 cmd->len |= F_INSN_SIZE(ipfw_insn); 3014 } 3015 3016 3017 /* 3018 * fills the addr and mask fields in the instruction as appropriate from av. 3019 * Update length as appropriate. 3020 * The following formats are allowed: 3021 * me returns O_IP_*_ME 3022 * 1.2.3.4 single IP address 3023 * 1.2.3.4:5.6.7.8 address:mask 3024 * 1.2.3.4/24 address/mask 3025 * 1.2.3.4/26{1,6,5,4,23} set of addresses in a subnet 3026 * We can have multiple comma-separated address/mask entries. 3027 */ 3028 static void 3029 fill_ip(ipfw_insn_ip *cmd, char *av, int cblen, struct tidx *tstate) 3030 { 3031 int len = 0; 3032 uint32_t *d = ((ipfw_insn_u32 *)cmd)->d; 3033 3034 cmd->o.len &= ~F_LEN_MASK; /* zero len */ 3035 3036 if (_substrcmp(av, "any") == 0) 3037 return; 3038 3039 if (_substrcmp(av, "me") == 0) { 3040 cmd->o.len |= F_INSN_SIZE(ipfw_insn); 3041 return; 3042 } 3043 3044 if (strncmp(av, "table(", 6) == 0) { 3045 fill_table(&cmd->o, av, O_IP_DST_LOOKUP, tstate); 3046 return; 3047 } 3048 3049 while (av) { 3050 /* 3051 * After the address we can have '/' or ':' indicating a mask, 3052 * ',' indicating another address follows, '{' indicating a 3053 * set of addresses of unspecified size. 3054 */ 3055 char *t = NULL, *p = strpbrk(av, "/:,{"); 3056 int masklen; 3057 char md, nd = '\0'; 3058 3059 CHECK_LENGTH(cblen, F_INSN_SIZE(ipfw_insn) + 2 + len); 3060 3061 if (p) { 3062 md = *p; 3063 *p++ = '\0'; 3064 if ((t = strpbrk(p, ",{")) != NULL) { 3065 nd = *t; 3066 *t = '\0'; 3067 } 3068 } else 3069 md = '\0'; 3070 3071 if (lookup_host(av, (struct in_addr *)&d[0]) != 0) 3072 errx(EX_NOHOST, "hostname ``%s'' unknown", av); 3073 switch (md) { 3074 case ':': 3075 if (!inet_aton(p, (struct in_addr *)&d[1])) 3076 errx(EX_DATAERR, "bad netmask ``%s''", p); 3077 break; 3078 case '/': 3079 masklen = atoi(p); 3080 if (masklen == 0) 3081 d[1] = htonl(0U); /* mask */ 3082 else if (masklen > 32) 3083 errx(EX_DATAERR, "bad width ``%s''", p); 3084 else 3085 d[1] = htonl(~0U << (32 - masklen)); 3086 break; 3087 case '{': /* no mask, assume /24 and put back the '{' */ 3088 d[1] = htonl(~0U << (32 - 24)); 3089 *(--p) = md; 3090 break; 3091 3092 case ',': /* single address plus continuation */ 3093 *(--p) = md; 3094 /* FALLTHROUGH */ 3095 case 0: /* initialization value */ 3096 default: 3097 d[1] = htonl(~0U); /* force /32 */ 3098 break; 3099 } 3100 d[0] &= d[1]; /* mask base address with mask */ 3101 if (t) 3102 *t = nd; 3103 /* find next separator */ 3104 if (p) 3105 p = strpbrk(p, ",{"); 3106 if (p && *p == '{') { 3107 /* 3108 * We have a set of addresses. They are stored as follows: 3109 * arg1 is the set size (powers of 2, 2..256) 3110 * addr is the base address IN HOST FORMAT 3111 * mask.. is an array of arg1 bits (rounded up to 3112 * the next multiple of 32) with bits set 3113 * for each host in the map. 3114 */ 3115 uint32_t *map = (uint32_t *)&cmd->mask; 3116 int low, high; 3117 int i = contigmask((uint8_t *)&(d[1]), 32); 3118 3119 if (len > 0) 3120 errx(EX_DATAERR, "address set cannot be in a list"); 3121 if (i < 24 || i > 31) 3122 errx(EX_DATAERR, "invalid set with mask %d\n", i); 3123 cmd->o.arg1 = 1<<(32-i); /* map length */ 3124 d[0] = ntohl(d[0]); /* base addr in host format */ 3125 cmd->o.opcode = O_IP_DST_SET; /* default */ 3126 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32) + (cmd->o.arg1+31)/32; 3127 for (i = 0; i < (cmd->o.arg1+31)/32 ; i++) 3128 map[i] = 0; /* clear map */ 3129 3130 av = p + 1; 3131 low = d[0] & 0xff; 3132 high = low + cmd->o.arg1 - 1; 3133 /* 3134 * Here, i stores the previous value when we specify a range 3135 * of addresses within a mask, e.g. 45-63. i = -1 means we 3136 * have no previous value. 3137 */ 3138 i = -1; /* previous value in a range */ 3139 while (isdigit(*av)) { 3140 char *s; 3141 int a = strtol(av, &s, 0); 3142 3143 if (s == av) { /* no parameter */ 3144 if (*av != '}') 3145 errx(EX_DATAERR, "set not closed\n"); 3146 if (i != -1) 3147 errx(EX_DATAERR, "incomplete range %d-", i); 3148 break; 3149 } 3150 if (a < low || a > high) 3151 errx(EX_DATAERR, "addr %d out of range [%d-%d]\n", 3152 a, low, high); 3153 a -= low; 3154 if (i == -1) /* no previous in range */ 3155 i = a; 3156 else { /* check that range is valid */ 3157 if (i > a) 3158 errx(EX_DATAERR, "invalid range %d-%d", 3159 i+low, a+low); 3160 if (*s == '-') 3161 errx(EX_DATAERR, "double '-' in range"); 3162 } 3163 for (; i <= a; i++) 3164 map[i/32] |= 1<<(i & 31); 3165 i = -1; 3166 if (*s == '-') 3167 i = a; 3168 else if (*s == '}') 3169 break; 3170 av = s+1; 3171 } 3172 return; 3173 } 3174 av = p; 3175 if (av) /* then *av must be a ',' */ 3176 av++; 3177 3178 /* Check this entry */ 3179 if (d[1] == 0) { /* "any", specified as x.x.x.x/0 */ 3180 /* 3181 * 'any' turns the entire list into a NOP. 3182 * 'not any' never matches, so it is removed from the 3183 * list unless it is the only item, in which case we 3184 * report an error. 3185 */ 3186 if (cmd->o.len & F_NOT) { /* "not any" never matches */ 3187 if (av == NULL && len == 0) /* only this entry */ 3188 errx(EX_DATAERR, "not any never matches"); 3189 } 3190 /* else do nothing and skip this entry */ 3191 return; 3192 } 3193 /* A single IP can be stored in an optimized format */ 3194 if (d[1] == (uint32_t)~0 && av == NULL && len == 0) { 3195 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32); 3196 return; 3197 } 3198 len += 2; /* two words... */ 3199 d += 2; 3200 } /* end while */ 3201 if (len + 1 > F_LEN_MASK) 3202 errx(EX_DATAERR, "address list too long"); 3203 cmd->o.len |= len+1; 3204 } 3205 3206 3207 /* n2mask sets n bits of the mask */ 3208 void 3209 n2mask(struct in6_addr *mask, int n) 3210 { 3211 static int minimask[9] = 3212 { 0x00, 0x80, 0xc0, 0xe0, 0xf0, 0xf8, 0xfc, 0xfe, 0xff }; 3213 u_char *p; 3214 3215 memset(mask, 0, sizeof(struct in6_addr)); 3216 p = (u_char *) mask; 3217 for (; n > 0; p++, n -= 8) { 3218 if (n >= 8) 3219 *p = 0xff; 3220 else 3221 *p = minimask[n]; 3222 } 3223 return; 3224 } 3225 3226 static void 3227 fill_flags_cmd(ipfw_insn *cmd, enum ipfw_opcodes opcode, 3228 struct _s_x *flags, char *p) 3229 { 3230 char *e; 3231 uint32_t set = 0, clear = 0; 3232 3233 if (fill_flags(flags, p, &e, &set, &clear) != 0) 3234 errx(EX_DATAERR, "invalid flag %s", e); 3235 3236 cmd->opcode = opcode; 3237 cmd->len = (cmd->len & (F_NOT | F_OR)) | 1; 3238 cmd->arg1 = (set & 0xff) | ( (clear & 0xff) << 8); 3239 } 3240 3241 3242 void 3243 ipfw_delete(char *av[]) 3244 { 3245 ipfw_range_tlv rt; 3246 char *sep; 3247 int i, j; 3248 int exitval = EX_OK; 3249 int do_set = 0; 3250 3251 av++; 3252 NEED1("missing rule specification"); 3253 if ( *av && _substrcmp(*av, "set") == 0) { 3254 /* Do not allow using the following syntax: 3255 * ipfw set N delete set M 3256 */ 3257 if (co.use_set) 3258 errx(EX_DATAERR, "invalid syntax"); 3259 do_set = 1; /* delete set */ 3260 av++; 3261 } 3262 3263 /* Rule number */ 3264 while (*av && isdigit(**av)) { 3265 i = strtol(*av, &sep, 10); 3266 j = i; 3267 if (*sep== '-') 3268 j = strtol(sep + 1, NULL, 10); 3269 av++; 3270 if (co.do_nat) { 3271 exitval = do_cmd(IP_FW_NAT_DEL, &i, sizeof i); 3272 if (exitval) { 3273 exitval = EX_UNAVAILABLE; 3274 if (co.do_quiet) 3275 continue; 3276 warn("nat %u not available", i); 3277 } 3278 } else if (co.do_pipe) { 3279 exitval = ipfw_delete_pipe(co.do_pipe, i); 3280 } else { 3281 memset(&rt, 0, sizeof(rt)); 3282 if (do_set != 0) { 3283 rt.set = i & 31; 3284 rt.flags = IPFW_RCFLAG_SET; 3285 } else { 3286 rt.start_rule = i & 0xffff; 3287 rt.end_rule = j & 0xffff; 3288 if (rt.start_rule == 0 && rt.end_rule == 0) 3289 rt.flags |= IPFW_RCFLAG_ALL; 3290 else 3291 rt.flags |= IPFW_RCFLAG_RANGE; 3292 if (co.use_set != 0) { 3293 rt.set = co.use_set - 1; 3294 rt.flags |= IPFW_RCFLAG_SET; 3295 } 3296 } 3297 i = do_range_cmd(IP_FW_XDEL, &rt); 3298 if (i != 0) { 3299 exitval = EX_UNAVAILABLE; 3300 if (co.do_quiet) 3301 continue; 3302 warn("rule %u: setsockopt(IP_FW_XDEL)", 3303 rt.start_rule); 3304 } else if (rt.new_set == 0 && do_set == 0) { 3305 exitval = EX_UNAVAILABLE; 3306 if (co.do_quiet) 3307 continue; 3308 if (rt.start_rule != rt.end_rule) 3309 warnx("no rules rules in %u-%u range", 3310 rt.start_rule, rt.end_rule); 3311 else 3312 warnx("rule %u not found", 3313 rt.start_rule); 3314 } 3315 } 3316 } 3317 if (exitval != EX_OK && co.do_force == 0) 3318 exit(exitval); 3319 } 3320 3321 3322 /* 3323 * fill the interface structure. We do not check the name as we can 3324 * create interfaces dynamically, so checking them at insert time 3325 * makes relatively little sense. 3326 * Interface names containing '*', '?', or '[' are assumed to be shell 3327 * patterns which match interfaces. 3328 */ 3329 static void 3330 fill_iface(ipfw_insn_if *cmd, char *arg, int cblen, struct tidx *tstate) 3331 { 3332 char *p; 3333 uint16_t uidx; 3334 3335 cmd->name[0] = '\0'; 3336 cmd->o.len |= F_INSN_SIZE(ipfw_insn_if); 3337 3338 CHECK_CMDLEN; 3339 3340 /* Parse the interface or address */ 3341 if (strcmp(arg, "any") == 0) 3342 cmd->o.len = 0; /* effectively ignore this command */ 3343 else if (strncmp(arg, "table(", 6) == 0) { 3344 if ((p = strchr(arg + 6, ')')) == NULL) 3345 errx(EX_DATAERR, "forgotten parenthesis: '%s'", arg); 3346 *p = '\0'; 3347 p = strchr(arg + 6, ','); 3348 if (p) 3349 *p++ = '\0'; 3350 if ((uidx = pack_table(tstate, arg + 6)) == 0) 3351 errx(EX_DATAERR, "Invalid table name: %s", arg + 6); 3352 3353 cmd->name[0] = '\1'; /* Special value indicating table */ 3354 cmd->p.kidx = uidx; 3355 } else if (!isdigit(*arg)) { 3356 strlcpy(cmd->name, arg, sizeof(cmd->name)); 3357 cmd->p.glob = strpbrk(arg, "*?[") != NULL ? 1 : 0; 3358 } else if (!inet_aton(arg, &cmd->p.ip)) 3359 errx(EX_DATAERR, "bad ip address ``%s''", arg); 3360 } 3361 3362 static void 3363 get_mac_addr_mask(const char *p, uint8_t *addr, uint8_t *mask) 3364 { 3365 int i; 3366 size_t l; 3367 char *ap, *ptr, *optr; 3368 struct ether_addr *mac; 3369 const char *macset = "0123456789abcdefABCDEF:"; 3370 3371 if (strcmp(p, "any") == 0) { 3372 for (i = 0; i < ETHER_ADDR_LEN; i++) 3373 addr[i] = mask[i] = 0; 3374 return; 3375 } 3376 3377 optr = ptr = strdup(p); 3378 if ((ap = strsep(&ptr, "&/")) != NULL && *ap != 0) { 3379 l = strlen(ap); 3380 if (strspn(ap, macset) != l || (mac = ether_aton(ap)) == NULL) 3381 errx(EX_DATAERR, "Incorrect MAC address"); 3382 bcopy(mac, addr, ETHER_ADDR_LEN); 3383 } else 3384 errx(EX_DATAERR, "Incorrect MAC address"); 3385 3386 if (ptr != NULL) { /* we have mask? */ 3387 if (p[ptr - optr - 1] == '/') { /* mask len */ 3388 long ml = strtol(ptr, &ap, 10); 3389 if (*ap != 0 || ml > ETHER_ADDR_LEN * 8 || ml < 0) 3390 errx(EX_DATAERR, "Incorrect mask length"); 3391 for (i = 0; ml > 0 && i < ETHER_ADDR_LEN; ml -= 8, i++) 3392 mask[i] = (ml >= 8) ? 0xff: (~0) << (8 - ml); 3393 } else { /* mask */ 3394 l = strlen(ptr); 3395 if (strspn(ptr, macset) != l || 3396 (mac = ether_aton(ptr)) == NULL) 3397 errx(EX_DATAERR, "Incorrect mask"); 3398 bcopy(mac, mask, ETHER_ADDR_LEN); 3399 } 3400 } else { /* default mask: ff:ff:ff:ff:ff:ff */ 3401 for (i = 0; i < ETHER_ADDR_LEN; i++) 3402 mask[i] = 0xff; 3403 } 3404 for (i = 0; i < ETHER_ADDR_LEN; i++) 3405 addr[i] &= mask[i]; 3406 3407 free(optr); 3408 } 3409 3410 /* 3411 * helper function, updates the pointer to cmd with the length 3412 * of the current command, and also cleans up the first word of 3413 * the new command in case it has been clobbered before. 3414 */ 3415 static ipfw_insn * 3416 next_cmd(ipfw_insn *cmd, int *len) 3417 { 3418 *len -= F_LEN(cmd); 3419 CHECK_LENGTH(*len, 0); 3420 cmd += F_LEN(cmd); 3421 bzero(cmd, sizeof(*cmd)); 3422 return cmd; 3423 } 3424 3425 /* 3426 * Takes arguments and copies them into a comment 3427 */ 3428 static void 3429 fill_comment(ipfw_insn *cmd, char **av, int cblen) 3430 { 3431 int i, l; 3432 char *p = (char *)(cmd + 1); 3433 3434 cmd->opcode = O_NOP; 3435 cmd->len = (cmd->len & (F_NOT | F_OR)); 3436 3437 /* Compute length of comment string. */ 3438 for (i = 0, l = 0; av[i] != NULL; i++) 3439 l += strlen(av[i]) + 1; 3440 if (l == 0) 3441 return; 3442 if (l > 84) 3443 errx(EX_DATAERR, 3444 "comment too long (max 80 chars)"); 3445 l = 1 + (l+3)/4; 3446 cmd->len = (cmd->len & (F_NOT | F_OR)) | l; 3447 CHECK_CMDLEN; 3448 3449 for (i = 0; av[i] != NULL; i++) { 3450 strcpy(p, av[i]); 3451 p += strlen(av[i]); 3452 *p++ = ' '; 3453 } 3454 *(--p) = '\0'; 3455 } 3456 3457 /* 3458 * A function to fill simple commands of size 1. 3459 * Existing flags are preserved. 3460 */ 3461 static void 3462 fill_cmd(ipfw_insn *cmd, enum ipfw_opcodes opcode, int flags, uint16_t arg) 3463 { 3464 cmd->opcode = opcode; 3465 cmd->len = ((cmd->len | flags) & (F_NOT | F_OR)) | 1; 3466 cmd->arg1 = arg; 3467 } 3468 3469 /* 3470 * Fetch and add the MAC address and type, with masks. This generates one or 3471 * two microinstructions, and returns the pointer to the last one. 3472 */ 3473 static ipfw_insn * 3474 add_mac(ipfw_insn *cmd, char *av[], int cblen) 3475 { 3476 ipfw_insn_mac *mac; 3477 3478 if ( ( av[0] == NULL ) || ( av[1] == NULL ) ) 3479 errx(EX_DATAERR, "MAC dst src"); 3480 3481 cmd->opcode = O_MACADDR2; 3482 cmd->len = (cmd->len & (F_NOT | F_OR)) | F_INSN_SIZE(ipfw_insn_mac); 3483 CHECK_CMDLEN; 3484 3485 mac = (ipfw_insn_mac *)cmd; 3486 get_mac_addr_mask(av[0], mac->addr, mac->mask); /* dst */ 3487 get_mac_addr_mask(av[1], &(mac->addr[ETHER_ADDR_LEN]), 3488 &(mac->mask[ETHER_ADDR_LEN])); /* src */ 3489 return cmd; 3490 } 3491 3492 static ipfw_insn * 3493 add_mactype(ipfw_insn *cmd, char *av, int cblen) 3494 { 3495 if (!av) 3496 errx(EX_DATAERR, "missing MAC type"); 3497 if (strcmp(av, "any") != 0) { /* we have a non-null type */ 3498 fill_newports((ipfw_insn_u16 *)cmd, av, IPPROTO_ETHERTYPE, 3499 cblen); 3500 cmd->opcode = O_MAC_TYPE; 3501 return cmd; 3502 } else 3503 return NULL; 3504 } 3505 3506 static ipfw_insn * 3507 add_proto0(ipfw_insn *cmd, char *av, u_char *protop) 3508 { 3509 struct protoent *pe; 3510 char *ep; 3511 int proto; 3512 3513 proto = strtol(av, &ep, 10); 3514 if (*ep != '\0' || proto <= 0) { 3515 if ((pe = getprotobyname(av)) == NULL) 3516 return NULL; 3517 proto = pe->p_proto; 3518 } 3519 3520 fill_cmd(cmd, O_PROTO, 0, proto); 3521 *protop = proto; 3522 return cmd; 3523 } 3524 3525 static ipfw_insn * 3526 add_proto(ipfw_insn *cmd, char *av, u_char *protop) 3527 { 3528 u_char proto = IPPROTO_IP; 3529 3530 if (_substrcmp(av, "all") == 0 || strcmp(av, "ip") == 0) 3531 ; /* do not set O_IP4 nor O_IP6 */ 3532 else if (strcmp(av, "ip4") == 0) 3533 /* explicit "just IPv4" rule */ 3534 fill_cmd(cmd, O_IP4, 0, 0); 3535 else if (strcmp(av, "ip6") == 0) { 3536 /* explicit "just IPv6" rule */ 3537 proto = IPPROTO_IPV6; 3538 fill_cmd(cmd, O_IP6, 0, 0); 3539 } else 3540 return add_proto0(cmd, av, protop); 3541 3542 *protop = proto; 3543 return cmd; 3544 } 3545 3546 static ipfw_insn * 3547 add_proto_compat(ipfw_insn *cmd, char *av, u_char *protop) 3548 { 3549 u_char proto = IPPROTO_IP; 3550 3551 if (_substrcmp(av, "all") == 0 || strcmp(av, "ip") == 0) 3552 ; /* do not set O_IP4 nor O_IP6 */ 3553 else if (strcmp(av, "ipv4") == 0 || strcmp(av, "ip4") == 0) 3554 /* explicit "just IPv4" rule */ 3555 fill_cmd(cmd, O_IP4, 0, 0); 3556 else if (strcmp(av, "ipv6") == 0 || strcmp(av, "ip6") == 0) { 3557 /* explicit "just IPv6" rule */ 3558 proto = IPPROTO_IPV6; 3559 fill_cmd(cmd, O_IP6, 0, 0); 3560 } else 3561 return add_proto0(cmd, av, protop); 3562 3563 *protop = proto; 3564 return cmd; 3565 } 3566 3567 static ipfw_insn * 3568 add_srcip(ipfw_insn *cmd, char *av, int cblen, struct tidx *tstate) 3569 { 3570 fill_ip((ipfw_insn_ip *)cmd, av, cblen, tstate); 3571 if (cmd->opcode == O_IP_DST_SET) /* set */ 3572 cmd->opcode = O_IP_SRC_SET; 3573 else if (cmd->opcode == O_IP_DST_LOOKUP) /* table */ 3574 cmd->opcode = O_IP_SRC_LOOKUP; 3575 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn)) /* me */ 3576 cmd->opcode = O_IP_SRC_ME; 3577 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_u32)) /* one IP */ 3578 cmd->opcode = O_IP_SRC; 3579 else /* addr/mask */ 3580 cmd->opcode = O_IP_SRC_MASK; 3581 return cmd; 3582 } 3583 3584 static ipfw_insn * 3585 add_dstip(ipfw_insn *cmd, char *av, int cblen, struct tidx *tstate) 3586 { 3587 fill_ip((ipfw_insn_ip *)cmd, av, cblen, tstate); 3588 if (cmd->opcode == O_IP_DST_SET) /* set */ 3589 ; 3590 else if (cmd->opcode == O_IP_DST_LOOKUP) /* table */ 3591 ; 3592 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn)) /* me */ 3593 cmd->opcode = O_IP_DST_ME; 3594 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_u32)) /* one IP */ 3595 cmd->opcode = O_IP_DST; 3596 else /* addr/mask */ 3597 cmd->opcode = O_IP_DST_MASK; 3598 return cmd; 3599 } 3600 3601 static struct _s_x f_reserved_keywords[] = { 3602 { "altq", TOK_OR }, 3603 { "//", TOK_OR }, 3604 { "diverted", TOK_OR }, 3605 { "dst-port", TOK_OR }, 3606 { "src-port", TOK_OR }, 3607 { "established", TOK_OR }, 3608 { "keep-state", TOK_OR }, 3609 { "frag", TOK_OR }, 3610 { "icmptypes", TOK_OR }, 3611 { "in", TOK_OR }, 3612 { "out", TOK_OR }, 3613 { "ip6", TOK_OR }, 3614 { "any", TOK_OR }, 3615 { "to", TOK_OR }, 3616 { "via", TOK_OR }, 3617 { "{", TOK_OR }, 3618 { NULL, 0 } /* terminator */ 3619 }; 3620 3621 static ipfw_insn * 3622 add_ports(ipfw_insn *cmd, char *av, u_char proto, int opcode, int cblen) 3623 { 3624 3625 if (match_token(f_reserved_keywords, av) != -1) 3626 return (NULL); 3627 3628 if (fill_newports((ipfw_insn_u16 *)cmd, av, proto, cblen)) { 3629 /* XXX todo: check that we have a protocol with ports */ 3630 cmd->opcode = opcode; 3631 return cmd; 3632 } 3633 return NULL; 3634 } 3635 3636 static ipfw_insn * 3637 add_src(ipfw_insn *cmd, char *av, u_char proto, int cblen, struct tidx *tstate) 3638 { 3639 struct in6_addr a; 3640 char *host, *ch, buf[INET6_ADDRSTRLEN]; 3641 ipfw_insn *ret = NULL; 3642 int len; 3643 3644 /* Copy first address in set if needed */ 3645 if ((ch = strpbrk(av, "/,")) != NULL) { 3646 len = ch - av; 3647 strlcpy(buf, av, sizeof(buf)); 3648 if (len < sizeof(buf)) 3649 buf[len] = '\0'; 3650 host = buf; 3651 } else 3652 host = av; 3653 3654 if (proto == IPPROTO_IPV6 || strcmp(av, "me6") == 0 || 3655 inet_pton(AF_INET6, host, &a) == 1) 3656 ret = add_srcip6(cmd, av, cblen, tstate); 3657 /* XXX: should check for IPv4, not !IPv6 */ 3658 if (ret == NULL && (proto == IPPROTO_IP || strcmp(av, "me") == 0 || 3659 inet_pton(AF_INET6, host, &a) != 1)) 3660 ret = add_srcip(cmd, av, cblen, tstate); 3661 if (ret == NULL && strcmp(av, "any") != 0) 3662 ret = cmd; 3663 3664 return ret; 3665 } 3666 3667 static ipfw_insn * 3668 add_dst(ipfw_insn *cmd, char *av, u_char proto, int cblen, struct tidx *tstate) 3669 { 3670 struct in6_addr a; 3671 char *host, *ch, buf[INET6_ADDRSTRLEN]; 3672 ipfw_insn *ret = NULL; 3673 int len; 3674 3675 /* Copy first address in set if needed */ 3676 if ((ch = strpbrk(av, "/,")) != NULL) { 3677 len = ch - av; 3678 strlcpy(buf, av, sizeof(buf)); 3679 if (len < sizeof(buf)) 3680 buf[len] = '\0'; 3681 host = buf; 3682 } else 3683 host = av; 3684 3685 if (proto == IPPROTO_IPV6 || strcmp(av, "me6") == 0 || 3686 inet_pton(AF_INET6, host, &a) == 1) 3687 ret = add_dstip6(cmd, av, cblen, tstate); 3688 /* XXX: should check for IPv4, not !IPv6 */ 3689 if (ret == NULL && (proto == IPPROTO_IP || strcmp(av, "me") == 0 || 3690 inet_pton(AF_INET6, host, &a) != 1)) 3691 ret = add_dstip(cmd, av, cblen, tstate); 3692 if (ret == NULL && strcmp(av, "any") != 0) 3693 ret = cmd; 3694 3695 return ret; 3696 } 3697 3698 /* 3699 * Parse arguments and assemble the microinstructions which make up a rule. 3700 * Rules are added into the 'rulebuf' and then copied in the correct order 3701 * into the actual rule. 3702 * 3703 * The syntax for a rule starts with the action, followed by 3704 * optional action parameters, and the various match patterns. 3705 * In the assembled microcode, the first opcode must be an O_PROBE_STATE 3706 * (generated if the rule includes a keep-state option), then the 3707 * various match patterns, log/altq actions, and the actual action. 3708 * 3709 */ 3710 void 3711 compile_rule(char *av[], uint32_t *rbuf, int *rbufsize, struct tidx *tstate) 3712 { 3713 /* 3714 * rules are added into the 'rulebuf' and then copied in 3715 * the correct order into the actual rule. 3716 * Some things that need to go out of order (prob, action etc.) 3717 * go into actbuf[]. 3718 */ 3719 static uint32_t actbuf[255], cmdbuf[255]; 3720 int rblen, ablen, cblen; 3721 3722 ipfw_insn *src, *dst, *cmd, *action, *prev=NULL; 3723 ipfw_insn *first_cmd; /* first match pattern */ 3724 3725 struct ip_fw_rule *rule; 3726 3727 /* 3728 * various flags used to record that we entered some fields. 3729 */ 3730 ipfw_insn *have_state = NULL; /* any state-related option */ 3731 int have_rstate = 0; 3732 ipfw_insn *have_log = NULL, *have_altq = NULL, *have_tag = NULL; 3733 ipfw_insn *have_skipcmd = NULL; 3734 size_t len; 3735 3736 int i; 3737 3738 int open_par = 0; /* open parenthesis ( */ 3739 3740 /* proto is here because it is used to fetch ports */ 3741 u_char proto = IPPROTO_IP; /* default protocol */ 3742 3743 double match_prob = 1; /* match probability, default is always match */ 3744 3745 bzero(actbuf, sizeof(actbuf)); /* actions go here */ 3746 bzero(cmdbuf, sizeof(cmdbuf)); 3747 bzero(rbuf, *rbufsize); 3748 3749 rule = (struct ip_fw_rule *)rbuf; 3750 cmd = (ipfw_insn *)cmdbuf; 3751 action = (ipfw_insn *)actbuf; 3752 3753 rblen = *rbufsize / sizeof(uint32_t); 3754 rblen -= sizeof(struct ip_fw_rule) / sizeof(uint32_t); 3755 ablen = sizeof(actbuf) / sizeof(actbuf[0]); 3756 cblen = sizeof(cmdbuf) / sizeof(cmdbuf[0]); 3757 cblen -= F_INSN_SIZE(ipfw_insn_u32) + 1; 3758 3759 #define CHECK_RBUFLEN(len) { CHECK_LENGTH(rblen, len); rblen -= len; } 3760 #define CHECK_ACTLEN CHECK_LENGTH(ablen, action->len) 3761 3762 av++; 3763 3764 /* [rule N] -- Rule number optional */ 3765 if (av[0] && isdigit(**av)) { 3766 rule->rulenum = atoi(*av); 3767 av++; 3768 } 3769 3770 /* [set N] -- set number (0..RESVD_SET), optional */ 3771 if (av[0] && av[1] && _substrcmp(*av, "set") == 0) { 3772 int set = strtoul(av[1], NULL, 10); 3773 if (set < 0 || set > RESVD_SET) 3774 errx(EX_DATAERR, "illegal set %s", av[1]); 3775 rule->set = set; 3776 tstate->set = set; 3777 av += 2; 3778 } 3779 3780 /* [prob D] -- match probability, optional */ 3781 if (av[0] && av[1] && _substrcmp(*av, "prob") == 0) { 3782 match_prob = strtod(av[1], NULL); 3783 3784 if (match_prob <= 0 || match_prob > 1) 3785 errx(EX_DATAERR, "illegal match prob. %s", av[1]); 3786 av += 2; 3787 } 3788 3789 /* action -- mandatory */ 3790 NEED1("missing action"); 3791 i = match_token(rule_actions, *av); 3792 av++; 3793 action->len = 1; /* default */ 3794 CHECK_ACTLEN; 3795 switch(i) { 3796 case TOK_CHECKSTATE: 3797 have_state = action; 3798 action->opcode = O_CHECK_STATE; 3799 if (*av == NULL || 3800 match_token(rule_options, *av) == TOK_COMMENT) { 3801 action->arg1 = pack_object(tstate, 3802 default_state_name, IPFW_TLV_STATE_NAME); 3803 break; 3804 } 3805 if (*av[0] == ':') { 3806 if (strcmp(*av + 1, "any") == 0) 3807 action->arg1 = 0; 3808 else if (state_check_name(*av + 1) == 0) 3809 action->arg1 = pack_object(tstate, *av + 1, 3810 IPFW_TLV_STATE_NAME); 3811 else 3812 errx(EX_DATAERR, "Invalid state name %s", 3813 *av); 3814 av++; 3815 break; 3816 } 3817 errx(EX_DATAERR, "Invalid state name %s", *av); 3818 break; 3819 3820 case TOK_ABORT: 3821 action->opcode = O_REJECT; 3822 action->arg1 = ICMP_REJECT_ABORT; 3823 break; 3824 3825 case TOK_ABORT6: 3826 action->opcode = O_UNREACH6; 3827 action->arg1 = ICMP6_UNREACH_ABORT; 3828 break; 3829 3830 case TOK_ACCEPT: 3831 action->opcode = O_ACCEPT; 3832 break; 3833 3834 case TOK_DENY: 3835 action->opcode = O_DENY; 3836 action->arg1 = 0; 3837 break; 3838 3839 case TOK_REJECT: 3840 action->opcode = O_REJECT; 3841 action->arg1 = ICMP_UNREACH_HOST; 3842 break; 3843 3844 case TOK_RESET: 3845 action->opcode = O_REJECT; 3846 action->arg1 = ICMP_REJECT_RST; 3847 break; 3848 3849 case TOK_RESET6: 3850 action->opcode = O_UNREACH6; 3851 action->arg1 = ICMP6_UNREACH_RST; 3852 break; 3853 3854 case TOK_UNREACH: 3855 action->opcode = O_REJECT; 3856 NEED1("missing reject code"); 3857 fill_reject_code(&action->arg1, *av); 3858 av++; 3859 break; 3860 3861 case TOK_UNREACH6: 3862 action->opcode = O_UNREACH6; 3863 NEED1("missing unreach code"); 3864 fill_unreach6_code(&action->arg1, *av); 3865 av++; 3866 break; 3867 3868 case TOK_COUNT: 3869 action->opcode = O_COUNT; 3870 break; 3871 3872 case TOK_NAT: 3873 action->opcode = O_NAT; 3874 action->len = F_INSN_SIZE(ipfw_insn_nat); 3875 CHECK_ACTLEN; 3876 if (*av != NULL && _substrcmp(*av, "global") == 0) { 3877 action->arg1 = IP_FW_NAT44_GLOBAL; 3878 av++; 3879 break; 3880 } else 3881 goto chkarg; 3882 case TOK_QUEUE: 3883 action->opcode = O_QUEUE; 3884 goto chkarg; 3885 case TOK_PIPE: 3886 action->opcode = O_PIPE; 3887 goto chkarg; 3888 case TOK_SKIPTO: 3889 action->opcode = O_SKIPTO; 3890 goto chkarg; 3891 case TOK_NETGRAPH: 3892 action->opcode = O_NETGRAPH; 3893 goto chkarg; 3894 case TOK_NGTEE: 3895 action->opcode = O_NGTEE; 3896 goto chkarg; 3897 case TOK_DIVERT: 3898 action->opcode = O_DIVERT; 3899 goto chkarg; 3900 case TOK_TEE: 3901 action->opcode = O_TEE; 3902 goto chkarg; 3903 case TOK_CALL: 3904 action->opcode = O_CALLRETURN; 3905 chkarg: 3906 if (!av[0]) 3907 errx(EX_USAGE, "missing argument for %s", *(av - 1)); 3908 if (isdigit(**av)) { 3909 action->arg1 = strtoul(*av, NULL, 10); 3910 if (action->arg1 <= 0 || action->arg1 >= IP_FW_TABLEARG) 3911 errx(EX_DATAERR, "illegal argument for %s", 3912 *(av - 1)); 3913 } else if (_substrcmp(*av, "tablearg") == 0) { 3914 action->arg1 = IP_FW_TARG; 3915 } else if (i == TOK_DIVERT || i == TOK_TEE) { 3916 struct servent *s; 3917 setservent(1); 3918 s = getservbyname(av[0], "divert"); 3919 if (s != NULL) 3920 action->arg1 = ntohs(s->s_port); 3921 else 3922 errx(EX_DATAERR, "illegal divert/tee port"); 3923 } else 3924 errx(EX_DATAERR, "illegal argument for %s", *(av - 1)); 3925 av++; 3926 break; 3927 3928 case TOK_FORWARD: { 3929 /* 3930 * Locate the address-port separator (':' or ','). 3931 * Could be one of the following: 3932 * hostname:port 3933 * IPv4 a.b.c.d,port 3934 * IPv4 a.b.c.d:port 3935 * IPv6 w:x:y::z,port 3936 * The ':' can only be used with hostname and IPv4 address. 3937 * XXX-BZ Should we also support [w:x:y::z]:port? 3938 */ 3939 struct sockaddr_storage result; 3940 struct addrinfo *res; 3941 char *s, *end; 3942 int family; 3943 u_short port_number; 3944 3945 NEED1("missing forward address[:port]"); 3946 3947 /* 3948 * locate the address-port separator (':' or ',') 3949 */ 3950 s = strchr(*av, ','); 3951 if (s == NULL) { 3952 /* Distinguish between IPv4:port and IPv6 cases. */ 3953 s = strchr(*av, ':'); 3954 if (s && strchr(s+1, ':')) 3955 s = NULL; /* no port */ 3956 } 3957 3958 port_number = 0; 3959 if (s != NULL) { 3960 /* Terminate host portion and set s to start of port. */ 3961 *(s++) = '\0'; 3962 i = strtoport(s, &end, 0 /* base */, 0 /* proto */); 3963 if (s == end) 3964 errx(EX_DATAERR, 3965 "illegal forwarding port ``%s''", s); 3966 port_number = (u_short)i; 3967 } 3968 3969 if (_substrcmp(*av, "tablearg") == 0) { 3970 family = PF_INET; 3971 ((struct sockaddr_in*)&result)->sin_addr.s_addr = 3972 INADDR_ANY; 3973 } else { 3974 /* 3975 * Resolve the host name or address to a family and a 3976 * network representation of the address. 3977 */ 3978 if (getaddrinfo(*av, NULL, NULL, &res)) 3979 errx(EX_DATAERR, NULL); 3980 /* Just use the first host in the answer. */ 3981 family = res->ai_family; 3982 memcpy(&result, res->ai_addr, res->ai_addrlen); 3983 freeaddrinfo(res); 3984 } 3985 3986 if (family == PF_INET) { 3987 ipfw_insn_sa *p = (ipfw_insn_sa *)action; 3988 3989 action->opcode = O_FORWARD_IP; 3990 action->len = F_INSN_SIZE(ipfw_insn_sa); 3991 CHECK_ACTLEN; 3992 3993 /* 3994 * In the kernel we assume AF_INET and use only 3995 * sin_port and sin_addr. Remember to set sin_len as 3996 * the routing code seems to use it too. 3997 */ 3998 p->sa.sin_len = sizeof(struct sockaddr_in); 3999 p->sa.sin_family = AF_INET; 4000 p->sa.sin_port = port_number; 4001 p->sa.sin_addr.s_addr = 4002 ((struct sockaddr_in *)&result)->sin_addr.s_addr; 4003 } else if (family == PF_INET6) { 4004 ipfw_insn_sa6 *p = (ipfw_insn_sa6 *)action; 4005 4006 action->opcode = O_FORWARD_IP6; 4007 action->len = F_INSN_SIZE(ipfw_insn_sa6); 4008 CHECK_ACTLEN; 4009 4010 p->sa.sin6_len = sizeof(struct sockaddr_in6); 4011 p->sa.sin6_family = AF_INET6; 4012 p->sa.sin6_port = port_number; 4013 p->sa.sin6_flowinfo = 0; 4014 p->sa.sin6_scope_id = 4015 ((struct sockaddr_in6 *)&result)->sin6_scope_id; 4016 bcopy(&((struct sockaddr_in6*)&result)->sin6_addr, 4017 &p->sa.sin6_addr, sizeof(p->sa.sin6_addr)); 4018 } else { 4019 errx(EX_DATAERR, "Invalid address family in forward action"); 4020 } 4021 av++; 4022 break; 4023 } 4024 case TOK_COMMENT: 4025 /* pretend it is a 'count' rule followed by the comment */ 4026 action->opcode = O_COUNT; 4027 av--; /* go back... */ 4028 break; 4029 4030 case TOK_SETFIB: 4031 { 4032 int numfibs; 4033 size_t intsize = sizeof(int); 4034 4035 action->opcode = O_SETFIB; 4036 NEED1("missing fib number"); 4037 if (_substrcmp(*av, "tablearg") == 0) { 4038 action->arg1 = IP_FW_TARG; 4039 } else { 4040 action->arg1 = strtoul(*av, NULL, 10); 4041 if (sysctlbyname("net.fibs", &numfibs, &intsize, 4042 NULL, 0) == -1) 4043 errx(EX_DATAERR, "fibs not suported.\n"); 4044 if (action->arg1 >= numfibs) /* Temporary */ 4045 errx(EX_DATAERR, "fib too large.\n"); 4046 /* Add high-order bit to fib to make room for tablearg*/ 4047 action->arg1 |= 0x8000; 4048 } 4049 av++; 4050 break; 4051 } 4052 4053 case TOK_SETDSCP: 4054 { 4055 int code; 4056 4057 action->opcode = O_SETDSCP; 4058 NEED1("missing DSCP code"); 4059 if (_substrcmp(*av, "tablearg") == 0) { 4060 action->arg1 = IP_FW_TARG; 4061 } else { 4062 if (isalpha(*av[0])) { 4063 if ((code = match_token(f_ipdscp, *av)) == -1) 4064 errx(EX_DATAERR, "Unknown DSCP code"); 4065 action->arg1 = code; 4066 } else 4067 action->arg1 = strtoul(*av, NULL, 10); 4068 /* 4069 * Add high-order bit to DSCP to make room 4070 * for tablearg 4071 */ 4072 action->arg1 |= 0x8000; 4073 } 4074 av++; 4075 break; 4076 } 4077 4078 case TOK_REASS: 4079 action->opcode = O_REASS; 4080 break; 4081 4082 case TOK_RETURN: 4083 fill_cmd(action, O_CALLRETURN, F_NOT, 0); 4084 break; 4085 4086 case TOK_TCPSETMSS: { 4087 u_long mss; 4088 uint16_t idx; 4089 4090 idx = pack_object(tstate, "tcp-setmss", IPFW_TLV_EACTION); 4091 if (idx == 0) 4092 errx(EX_DATAERR, "pack_object failed"); 4093 fill_cmd(action, O_EXTERNAL_ACTION, 0, idx); 4094 NEED1("Missing MSS value"); 4095 action = next_cmd(action, &ablen); 4096 action->len = 1; 4097 CHECK_ACTLEN; 4098 mss = strtoul(*av, NULL, 10); 4099 if (mss == 0 || mss > UINT16_MAX) 4100 errx(EX_USAGE, "invalid MSS value %s", *av); 4101 fill_cmd(action, O_EXTERNAL_DATA, 0, (uint16_t)mss); 4102 av++; 4103 break; 4104 } 4105 4106 default: 4107 av--; 4108 if (match_token(rule_eactions, *av) == -1) 4109 errx(EX_DATAERR, "invalid action %s\n", *av); 4110 /* 4111 * External actions support. 4112 * XXX: we support only syntax with instance name. 4113 * For known external actions (from rule_eactions list) 4114 * we can handle syntax directly. But with `eaction' 4115 * keyword we can use only `eaction <name> <instance>' 4116 * syntax. 4117 */ 4118 case TOK_EACTION: { 4119 uint16_t idx; 4120 4121 NEED1("Missing eaction name"); 4122 if (eaction_check_name(*av) != 0) 4123 errx(EX_DATAERR, "Invalid eaction name %s", *av); 4124 idx = pack_object(tstate, *av, IPFW_TLV_EACTION); 4125 if (idx == 0) 4126 errx(EX_DATAERR, "pack_object failed"); 4127 fill_cmd(action, O_EXTERNAL_ACTION, 0, idx); 4128 av++; 4129 NEED1("Missing eaction instance name"); 4130 action = next_cmd(action, &ablen); 4131 action->len = 1; 4132 CHECK_ACTLEN; 4133 if (eaction_check_name(*av) != 0) 4134 errx(EX_DATAERR, "Invalid eaction instance name %s", 4135 *av); 4136 /* 4137 * External action instance object has TLV type depended 4138 * from the external action name object index. Since we 4139 * currently don't know this index, use zero as TLV type. 4140 */ 4141 idx = pack_object(tstate, *av, 0); 4142 if (idx == 0) 4143 errx(EX_DATAERR, "pack_object failed"); 4144 fill_cmd(action, O_EXTERNAL_INSTANCE, 0, idx); 4145 av++; 4146 } 4147 } 4148 action = next_cmd(action, &ablen); 4149 4150 /* 4151 * [altq queuename] -- altq tag, optional 4152 * [log [logamount N]] -- log, optional 4153 * 4154 * If they exist, it go first in the cmdbuf, but then it is 4155 * skipped in the copy section to the end of the buffer. 4156 */ 4157 while (av[0] != NULL && (i = match_token(rule_action_params, *av)) != -1) { 4158 av++; 4159 switch (i) { 4160 case TOK_LOG: 4161 { 4162 ipfw_insn_log *c = (ipfw_insn_log *)cmd; 4163 int l; 4164 4165 if (have_log) 4166 errx(EX_DATAERR, 4167 "log cannot be specified more than once"); 4168 have_log = (ipfw_insn *)c; 4169 cmd->len = F_INSN_SIZE(ipfw_insn_log); 4170 CHECK_CMDLEN; 4171 cmd->opcode = O_LOG; 4172 if (av[0] && _substrcmp(*av, "logamount") == 0) { 4173 av++; 4174 NEED1("logamount requires argument"); 4175 l = atoi(*av); 4176 if (l < 0) 4177 errx(EX_DATAERR, 4178 "logamount must be positive"); 4179 c->max_log = l; 4180 av++; 4181 } else { 4182 len = sizeof(c->max_log); 4183 if (sysctlbyname("net.inet.ip.fw.verbose_limit", 4184 &c->max_log, &len, NULL, 0) == -1) { 4185 if (co.test_only) { 4186 c->max_log = 0; 4187 break; 4188 } 4189 errx(1, "sysctlbyname(\"%s\")", 4190 "net.inet.ip.fw.verbose_limit"); 4191 } 4192 } 4193 } 4194 break; 4195 4196 #ifndef NO_ALTQ 4197 case TOK_ALTQ: 4198 { 4199 ipfw_insn_altq *a = (ipfw_insn_altq *)cmd; 4200 4201 NEED1("missing altq queue name"); 4202 if (have_altq) 4203 errx(EX_DATAERR, 4204 "altq cannot be specified more than once"); 4205 have_altq = (ipfw_insn *)a; 4206 cmd->len = F_INSN_SIZE(ipfw_insn_altq); 4207 CHECK_CMDLEN; 4208 cmd->opcode = O_ALTQ; 4209 a->qid = altq_name_to_qid(*av); 4210 av++; 4211 } 4212 break; 4213 #endif 4214 4215 case TOK_TAG: 4216 case TOK_UNTAG: { 4217 uint16_t tag; 4218 4219 if (have_tag) 4220 errx(EX_USAGE, "tag and untag cannot be " 4221 "specified more than once"); 4222 GET_UINT_ARG(tag, IPFW_ARG_MIN, IPFW_ARG_MAX, i, 4223 rule_action_params); 4224 have_tag = cmd; 4225 fill_cmd(cmd, O_TAG, (i == TOK_TAG) ? 0: F_NOT, tag); 4226 av++; 4227 break; 4228 } 4229 4230 default: 4231 abort(); 4232 } 4233 cmd = next_cmd(cmd, &cblen); 4234 } 4235 4236 if (have_state) { /* must be a check-state, we are done */ 4237 if (*av != NULL && 4238 match_token(rule_options, *av) == TOK_COMMENT) { 4239 /* check-state has a comment */ 4240 av++; 4241 fill_comment(cmd, av, cblen); 4242 cmd = next_cmd(cmd, &cblen); 4243 av[0] = NULL; 4244 } 4245 goto done; 4246 } 4247 4248 #define OR_START(target) \ 4249 if (av[0] && (*av[0] == '(' || *av[0] == '{')) { \ 4250 if (open_par) \ 4251 errx(EX_USAGE, "nested \"(\" not allowed\n"); \ 4252 prev = NULL; \ 4253 open_par = 1; \ 4254 if ( (av[0])[1] == '\0') { \ 4255 av++; \ 4256 } else \ 4257 (*av)++; \ 4258 } \ 4259 target: \ 4260 4261 4262 #define CLOSE_PAR \ 4263 if (open_par) { \ 4264 if (av[0] && ( \ 4265 strcmp(*av, ")") == 0 || \ 4266 strcmp(*av, "}") == 0)) { \ 4267 prev = NULL; \ 4268 open_par = 0; \ 4269 av++; \ 4270 } else \ 4271 errx(EX_USAGE, "missing \")\"\n"); \ 4272 } 4273 4274 #define NOT_BLOCK \ 4275 if (av[0] && _substrcmp(*av, "not") == 0) { \ 4276 if (cmd->len & F_NOT) \ 4277 errx(EX_USAGE, "double \"not\" not allowed\n"); \ 4278 cmd->len |= F_NOT; \ 4279 av++; \ 4280 } 4281 4282 #define OR_BLOCK(target) \ 4283 if (av[0] && _substrcmp(*av, "or") == 0) { \ 4284 if (prev == NULL || open_par == 0) \ 4285 errx(EX_DATAERR, "invalid OR block"); \ 4286 prev->len |= F_OR; \ 4287 av++; \ 4288 goto target; \ 4289 } \ 4290 CLOSE_PAR; 4291 4292 first_cmd = cmd; 4293 4294 #if 0 4295 /* 4296 * MAC addresses, optional. 4297 * If we have this, we skip the part "proto from src to dst" 4298 * and jump straight to the option parsing. 4299 */ 4300 NOT_BLOCK; 4301 NEED1("missing protocol"); 4302 if (_substrcmp(*av, "MAC") == 0 || 4303 _substrcmp(*av, "mac") == 0) { 4304 av++; /* the "MAC" keyword */ 4305 add_mac(cmd, av); /* exits in case of errors */ 4306 cmd = next_cmd(cmd); 4307 av += 2; /* dst-mac and src-mac */ 4308 NOT_BLOCK; 4309 NEED1("missing mac type"); 4310 if (add_mactype(cmd, av[0])) 4311 cmd = next_cmd(cmd); 4312 av++; /* any or mac-type */ 4313 goto read_options; 4314 } 4315 #endif 4316 4317 /* 4318 * protocol, mandatory 4319 */ 4320 OR_START(get_proto); 4321 NOT_BLOCK; 4322 NEED1("missing protocol"); 4323 if (add_proto_compat(cmd, *av, &proto)) { 4324 av++; 4325 if (F_LEN(cmd) != 0) { 4326 prev = cmd; 4327 cmd = next_cmd(cmd, &cblen); 4328 } 4329 } else if (first_cmd != cmd) { 4330 errx(EX_DATAERR, "invalid protocol ``%s''", *av); 4331 } else 4332 goto read_options; 4333 OR_BLOCK(get_proto); 4334 4335 /* 4336 * "from", mandatory 4337 */ 4338 if ((av[0] == NULL) || _substrcmp(*av, "from") != 0) 4339 errx(EX_USAGE, "missing ``from''"); 4340 av++; 4341 4342 /* 4343 * source IP, mandatory 4344 */ 4345 OR_START(source_ip); 4346 NOT_BLOCK; /* optional "not" */ 4347 NEED1("missing source address"); 4348 if (add_src(cmd, *av, proto, cblen, tstate)) { 4349 av++; 4350 if (F_LEN(cmd) != 0) { /* ! any */ 4351 prev = cmd; 4352 cmd = next_cmd(cmd, &cblen); 4353 } 4354 } else 4355 errx(EX_USAGE, "bad source address %s", *av); 4356 OR_BLOCK(source_ip); 4357 4358 /* 4359 * source ports, optional 4360 */ 4361 NOT_BLOCK; /* optional "not" */ 4362 if ( av[0] != NULL ) { 4363 if (_substrcmp(*av, "any") == 0 || 4364 add_ports(cmd, *av, proto, O_IP_SRCPORT, cblen)) { 4365 av++; 4366 if (F_LEN(cmd) != 0) 4367 cmd = next_cmd(cmd, &cblen); 4368 } 4369 } 4370 4371 /* 4372 * "to", mandatory 4373 */ 4374 if ( (av[0] == NULL) || _substrcmp(*av, "to") != 0 ) 4375 errx(EX_USAGE, "missing ``to''"); 4376 av++; 4377 4378 /* 4379 * destination, mandatory 4380 */ 4381 OR_START(dest_ip); 4382 NOT_BLOCK; /* optional "not" */ 4383 NEED1("missing dst address"); 4384 if (add_dst(cmd, *av, proto, cblen, tstate)) { 4385 av++; 4386 if (F_LEN(cmd) != 0) { /* ! any */ 4387 prev = cmd; 4388 cmd = next_cmd(cmd, &cblen); 4389 } 4390 } else 4391 errx( EX_USAGE, "bad destination address %s", *av); 4392 OR_BLOCK(dest_ip); 4393 4394 /* 4395 * dest. ports, optional 4396 */ 4397 NOT_BLOCK; /* optional "not" */ 4398 if (av[0]) { 4399 if (_substrcmp(*av, "any") == 0 || 4400 add_ports(cmd, *av, proto, O_IP_DSTPORT, cblen)) { 4401 av++; 4402 if (F_LEN(cmd) != 0) 4403 cmd = next_cmd(cmd, &cblen); 4404 } 4405 } 4406 4407 read_options: 4408 prev = NULL; 4409 while ( av[0] != NULL ) { 4410 char *s; 4411 ipfw_insn_u32 *cmd32; /* alias for cmd */ 4412 4413 s = *av; 4414 cmd32 = (ipfw_insn_u32 *)cmd; 4415 4416 if (*s == '!') { /* alternate syntax for NOT */ 4417 if (cmd->len & F_NOT) 4418 errx(EX_USAGE, "double \"not\" not allowed\n"); 4419 cmd->len = F_NOT; 4420 s++; 4421 } 4422 i = match_token(rule_options, s); 4423 av++; 4424 switch(i) { 4425 case TOK_NOT: 4426 if (cmd->len & F_NOT) 4427 errx(EX_USAGE, "double \"not\" not allowed\n"); 4428 cmd->len = F_NOT; 4429 break; 4430 4431 case TOK_OR: 4432 if (open_par == 0 || prev == NULL) 4433 errx(EX_USAGE, "invalid \"or\" block\n"); 4434 prev->len |= F_OR; 4435 break; 4436 4437 case TOK_STARTBRACE: 4438 if (open_par) 4439 errx(EX_USAGE, "+nested \"(\" not allowed\n"); 4440 open_par = 1; 4441 break; 4442 4443 case TOK_ENDBRACE: 4444 if (!open_par) 4445 errx(EX_USAGE, "+missing \")\"\n"); 4446 open_par = 0; 4447 prev = NULL; 4448 break; 4449 4450 case TOK_IN: 4451 fill_cmd(cmd, O_IN, 0, 0); 4452 break; 4453 4454 case TOK_OUT: 4455 cmd->len ^= F_NOT; /* toggle F_NOT */ 4456 fill_cmd(cmd, O_IN, 0, 0); 4457 break; 4458 4459 case TOK_DIVERTED: 4460 fill_cmd(cmd, O_DIVERTED, 0, 3); 4461 break; 4462 4463 case TOK_DIVERTEDLOOPBACK: 4464 fill_cmd(cmd, O_DIVERTED, 0, 1); 4465 break; 4466 4467 case TOK_DIVERTEDOUTPUT: 4468 fill_cmd(cmd, O_DIVERTED, 0, 2); 4469 break; 4470 4471 case TOK_FRAG: 4472 fill_cmd(cmd, O_FRAG, 0, 0); 4473 break; 4474 4475 case TOK_LAYER2: 4476 fill_cmd(cmd, O_LAYER2, 0, 0); 4477 break; 4478 4479 case TOK_XMIT: 4480 case TOK_RECV: 4481 case TOK_VIA: 4482 NEED1("recv, xmit, via require interface name" 4483 " or address"); 4484 fill_iface((ipfw_insn_if *)cmd, av[0], cblen, tstate); 4485 av++; 4486 if (F_LEN(cmd) == 0) /* not a valid address */ 4487 break; 4488 if (i == TOK_XMIT) 4489 cmd->opcode = O_XMIT; 4490 else if (i == TOK_RECV) 4491 cmd->opcode = O_RECV; 4492 else if (i == TOK_VIA) 4493 cmd->opcode = O_VIA; 4494 break; 4495 4496 case TOK_ICMPTYPES: 4497 NEED1("icmptypes requires list of types"); 4498 fill_icmptypes((ipfw_insn_u32 *)cmd, *av); 4499 av++; 4500 break; 4501 4502 case TOK_ICMP6TYPES: 4503 NEED1("icmptypes requires list of types"); 4504 fill_icmp6types((ipfw_insn_icmp6 *)cmd, *av, cblen); 4505 av++; 4506 break; 4507 4508 case TOK_IPTTL: 4509 NEED1("ipttl requires TTL"); 4510 if (strpbrk(*av, "-,")) { 4511 if (!add_ports(cmd, *av, 0, O_IPTTL, cblen)) 4512 errx(EX_DATAERR, "invalid ipttl %s", *av); 4513 } else 4514 fill_cmd(cmd, O_IPTTL, 0, strtoul(*av, NULL, 0)); 4515 av++; 4516 break; 4517 4518 case TOK_IPID: 4519 NEED1("ipid requires id"); 4520 if (strpbrk(*av, "-,")) { 4521 if (!add_ports(cmd, *av, 0, O_IPID, cblen)) 4522 errx(EX_DATAERR, "invalid ipid %s", *av); 4523 } else 4524 fill_cmd(cmd, O_IPID, 0, strtoul(*av, NULL, 0)); 4525 av++; 4526 break; 4527 4528 case TOK_IPLEN: 4529 NEED1("iplen requires length"); 4530 if (strpbrk(*av, "-,")) { 4531 if (!add_ports(cmd, *av, 0, O_IPLEN, cblen)) 4532 errx(EX_DATAERR, "invalid ip len %s", *av); 4533 } else 4534 fill_cmd(cmd, O_IPLEN, 0, strtoul(*av, NULL, 0)); 4535 av++; 4536 break; 4537 4538 case TOK_IPVER: 4539 NEED1("ipver requires version"); 4540 fill_cmd(cmd, O_IPVER, 0, strtoul(*av, NULL, 0)); 4541 av++; 4542 break; 4543 4544 case TOK_IPPRECEDENCE: 4545 NEED1("ipprecedence requires value"); 4546 fill_cmd(cmd, O_IPPRECEDENCE, 0, 4547 (strtoul(*av, NULL, 0) & 7) << 5); 4548 av++; 4549 break; 4550 4551 case TOK_DSCP: 4552 NEED1("missing DSCP code"); 4553 fill_dscp(cmd, *av, cblen); 4554 av++; 4555 break; 4556 4557 case TOK_IPOPTS: 4558 NEED1("missing argument for ipoptions"); 4559 fill_flags_cmd(cmd, O_IPOPT, f_ipopts, *av); 4560 av++; 4561 break; 4562 4563 case TOK_IPTOS: 4564 NEED1("missing argument for iptos"); 4565 fill_flags_cmd(cmd, O_IPTOS, f_iptos, *av); 4566 av++; 4567 break; 4568 4569 case TOK_UID: 4570 NEED1("uid requires argument"); 4571 { 4572 char *end; 4573 uid_t uid; 4574 struct passwd *pwd; 4575 4576 cmd->opcode = O_UID; 4577 uid = strtoul(*av, &end, 0); 4578 pwd = (*end == '\0') ? getpwuid(uid) : getpwnam(*av); 4579 if (pwd == NULL) 4580 errx(EX_DATAERR, "uid \"%s\" nonexistent", *av); 4581 cmd32->d[0] = pwd->pw_uid; 4582 cmd->len |= F_INSN_SIZE(ipfw_insn_u32); 4583 av++; 4584 } 4585 break; 4586 4587 case TOK_GID: 4588 NEED1("gid requires argument"); 4589 { 4590 char *end; 4591 gid_t gid; 4592 struct group *grp; 4593 4594 cmd->opcode = O_GID; 4595 gid = strtoul(*av, &end, 0); 4596 grp = (*end == '\0') ? getgrgid(gid) : getgrnam(*av); 4597 if (grp == NULL) 4598 errx(EX_DATAERR, "gid \"%s\" nonexistent", *av); 4599 cmd32->d[0] = grp->gr_gid; 4600 cmd->len |= F_INSN_SIZE(ipfw_insn_u32); 4601 av++; 4602 } 4603 break; 4604 4605 case TOK_JAIL: 4606 NEED1("jail requires argument"); 4607 { 4608 int jid; 4609 4610 cmd->opcode = O_JAIL; 4611 jid = jail_getid(*av); 4612 if (jid < 0) 4613 errx(EX_DATAERR, "%s", jail_errmsg); 4614 cmd32->d[0] = (uint32_t)jid; 4615 cmd->len |= F_INSN_SIZE(ipfw_insn_u32); 4616 av++; 4617 } 4618 break; 4619 4620 case TOK_ESTAB: 4621 fill_cmd(cmd, O_ESTAB, 0, 0); 4622 break; 4623 4624 case TOK_SETUP: 4625 fill_cmd(cmd, O_TCPFLAGS, 0, 4626 (TH_SYN) | ( (TH_ACK) & 0xff) <<8 ); 4627 break; 4628 4629 case TOK_TCPDATALEN: 4630 NEED1("tcpdatalen requires length"); 4631 if (strpbrk(*av, "-,")) { 4632 if (!add_ports(cmd, *av, 0, O_TCPDATALEN, cblen)) 4633 errx(EX_DATAERR, "invalid tcpdata len %s", *av); 4634 } else 4635 fill_cmd(cmd, O_TCPDATALEN, 0, 4636 strtoul(*av, NULL, 0)); 4637 av++; 4638 break; 4639 4640 case TOK_TCPOPTS: 4641 NEED1("missing argument for tcpoptions"); 4642 fill_flags_cmd(cmd, O_TCPOPTS, f_tcpopts, *av); 4643 av++; 4644 break; 4645 4646 case TOK_TCPSEQ: 4647 case TOK_TCPACK: 4648 NEED1("tcpseq/tcpack requires argument"); 4649 cmd->len = F_INSN_SIZE(ipfw_insn_u32); 4650 cmd->opcode = (i == TOK_TCPSEQ) ? O_TCPSEQ : O_TCPACK; 4651 cmd32->d[0] = htonl(strtoul(*av, NULL, 0)); 4652 av++; 4653 break; 4654 4655 case TOK_TCPWIN: 4656 NEED1("tcpwin requires length"); 4657 if (strpbrk(*av, "-,")) { 4658 if (!add_ports(cmd, *av, 0, O_TCPWIN, cblen)) 4659 errx(EX_DATAERR, "invalid tcpwin len %s", *av); 4660 } else 4661 fill_cmd(cmd, O_TCPWIN, 0, 4662 strtoul(*av, NULL, 0)); 4663 av++; 4664 break; 4665 4666 case TOK_TCPFLAGS: 4667 NEED1("missing argument for tcpflags"); 4668 cmd->opcode = O_TCPFLAGS; 4669 fill_flags_cmd(cmd, O_TCPFLAGS, f_tcpflags, *av); 4670 av++; 4671 break; 4672 4673 case TOK_KEEPSTATE: 4674 case TOK_RECORDSTATE: { 4675 uint16_t uidx; 4676 4677 if (open_par) 4678 errx(EX_USAGE, "keep-state or record-state cannot be part " 4679 "of an or block"); 4680 if (have_state) 4681 errx(EX_USAGE, "only one of keep-state, record-state, " 4682 " limit and set-limit is allowed"); 4683 if (*av != NULL && *av[0] == ':') { 4684 if (state_check_name(*av + 1) != 0) 4685 errx(EX_DATAERR, 4686 "Invalid state name %s", *av); 4687 uidx = pack_object(tstate, *av + 1, 4688 IPFW_TLV_STATE_NAME); 4689 av++; 4690 } else 4691 uidx = pack_object(tstate, default_state_name, 4692 IPFW_TLV_STATE_NAME); 4693 have_state = cmd; 4694 have_rstate = i == TOK_RECORDSTATE; 4695 fill_cmd(cmd, O_KEEP_STATE, 0, uidx); 4696 break; 4697 } 4698 4699 case TOK_LIMIT: 4700 case TOK_SETLIMIT: { 4701 ipfw_insn_limit *c = (ipfw_insn_limit *)cmd; 4702 int val; 4703 4704 if (open_par) 4705 errx(EX_USAGE, 4706 "limit or set-limit cannot be part of an or block"); 4707 if (have_state) 4708 errx(EX_USAGE, "only one of keep-state, record-state, " 4709 " limit and set-limit is allowed"); 4710 have_state = cmd; 4711 have_rstate = i == TOK_SETLIMIT; 4712 4713 cmd->len = F_INSN_SIZE(ipfw_insn_limit); 4714 CHECK_CMDLEN; 4715 cmd->opcode = O_LIMIT; 4716 c->limit_mask = c->conn_limit = 0; 4717 4718 while ( av[0] != NULL ) { 4719 if ((val = match_token(limit_masks, *av)) <= 0) 4720 break; 4721 c->limit_mask |= val; 4722 av++; 4723 } 4724 4725 if (c->limit_mask == 0) 4726 errx(EX_USAGE, "limit: missing limit mask"); 4727 4728 GET_UINT_ARG(c->conn_limit, IPFW_ARG_MIN, IPFW_ARG_MAX, 4729 TOK_LIMIT, rule_options); 4730 av++; 4731 4732 if (*av != NULL && *av[0] == ':') { 4733 if (state_check_name(*av + 1) != 0) 4734 errx(EX_DATAERR, 4735 "Invalid state name %s", *av); 4736 cmd->arg1 = pack_object(tstate, *av + 1, 4737 IPFW_TLV_STATE_NAME); 4738 av++; 4739 } else 4740 cmd->arg1 = pack_object(tstate, 4741 default_state_name, IPFW_TLV_STATE_NAME); 4742 break; 4743 } 4744 4745 case TOK_PROTO: 4746 NEED1("missing protocol"); 4747 if (add_proto(cmd, *av, &proto)) { 4748 av++; 4749 } else 4750 errx(EX_DATAERR, "invalid protocol ``%s''", 4751 *av); 4752 break; 4753 4754 case TOK_SRCIP: 4755 NEED1("missing source IP"); 4756 if (add_srcip(cmd, *av, cblen, tstate)) { 4757 av++; 4758 } 4759 break; 4760 4761 case TOK_DSTIP: 4762 NEED1("missing destination IP"); 4763 if (add_dstip(cmd, *av, cblen, tstate)) { 4764 av++; 4765 } 4766 break; 4767 4768 case TOK_SRCIP6: 4769 NEED1("missing source IP6"); 4770 if (add_srcip6(cmd, *av, cblen, tstate)) { 4771 av++; 4772 } 4773 break; 4774 4775 case TOK_DSTIP6: 4776 NEED1("missing destination IP6"); 4777 if (add_dstip6(cmd, *av, cblen, tstate)) { 4778 av++; 4779 } 4780 break; 4781 4782 case TOK_SRCPORT: 4783 NEED1("missing source port"); 4784 if (_substrcmp(*av, "any") == 0 || 4785 add_ports(cmd, *av, proto, O_IP_SRCPORT, cblen)) { 4786 av++; 4787 } else 4788 errx(EX_DATAERR, "invalid source port %s", *av); 4789 break; 4790 4791 case TOK_DSTPORT: 4792 NEED1("missing destination port"); 4793 if (_substrcmp(*av, "any") == 0 || 4794 add_ports(cmd, *av, proto, O_IP_DSTPORT, cblen)) { 4795 av++; 4796 } else 4797 errx(EX_DATAERR, "invalid destination port %s", 4798 *av); 4799 break; 4800 4801 case TOK_MAC: 4802 if (add_mac(cmd, av, cblen)) 4803 av += 2; 4804 break; 4805 4806 case TOK_MACTYPE: 4807 NEED1("missing mac type"); 4808 if (!add_mactype(cmd, *av, cblen)) 4809 errx(EX_DATAERR, "invalid mac type %s", *av); 4810 av++; 4811 break; 4812 4813 case TOK_VERREVPATH: 4814 fill_cmd(cmd, O_VERREVPATH, 0, 0); 4815 break; 4816 4817 case TOK_VERSRCREACH: 4818 fill_cmd(cmd, O_VERSRCREACH, 0, 0); 4819 break; 4820 4821 case TOK_ANTISPOOF: 4822 fill_cmd(cmd, O_ANTISPOOF, 0, 0); 4823 break; 4824 4825 case TOK_IPSEC: 4826 fill_cmd(cmd, O_IPSEC, 0, 0); 4827 break; 4828 4829 case TOK_IPV6: 4830 fill_cmd(cmd, O_IP6, 0, 0); 4831 break; 4832 4833 case TOK_IPV4: 4834 fill_cmd(cmd, O_IP4, 0, 0); 4835 break; 4836 4837 case TOK_EXT6HDR: 4838 fill_ext6hdr( cmd, *av ); 4839 av++; 4840 break; 4841 4842 case TOK_FLOWID: 4843 if (proto != IPPROTO_IPV6 ) 4844 errx( EX_USAGE, "flow-id filter is active " 4845 "only for ipv6 protocol\n"); 4846 fill_flow6( (ipfw_insn_u32 *) cmd, *av, cblen); 4847 av++; 4848 break; 4849 4850 case TOK_COMMENT: 4851 fill_comment(cmd, av, cblen); 4852 av[0]=NULL; 4853 break; 4854 4855 case TOK_TAGGED: 4856 if (av[0] && strpbrk(*av, "-,")) { 4857 if (!add_ports(cmd, *av, 0, O_TAGGED, cblen)) 4858 errx(EX_DATAERR, "tagged: invalid tag" 4859 " list: %s", *av); 4860 } 4861 else { 4862 uint16_t tag; 4863 4864 GET_UINT_ARG(tag, IPFW_ARG_MIN, IPFW_ARG_MAX, 4865 TOK_TAGGED, rule_options); 4866 fill_cmd(cmd, O_TAGGED, 0, tag); 4867 } 4868 av++; 4869 break; 4870 4871 case TOK_FIB: 4872 NEED1("fib requires fib number"); 4873 fill_cmd(cmd, O_FIB, 0, strtoul(*av, NULL, 0)); 4874 av++; 4875 break; 4876 case TOK_SOCKARG: 4877 fill_cmd(cmd, O_SOCKARG, 0, 0); 4878 break; 4879 4880 case TOK_LOOKUP: { 4881 ipfw_insn_u32 *c = (ipfw_insn_u32 *)cmd; 4882 int j; 4883 4884 if (!av[0] || !av[1]) 4885 errx(EX_USAGE, "format: lookup argument tablenum"); 4886 cmd->opcode = O_IP_DST_LOOKUP; 4887 cmd->len |= F_INSN_SIZE(ipfw_insn) + 2; 4888 i = match_token(rule_options, *av); 4889 for (j = 0; lookup_key[j] >= 0 ; j++) { 4890 if (i == lookup_key[j]) 4891 break; 4892 } 4893 if (lookup_key[j] <= 0) 4894 errx(EX_USAGE, "format: cannot lookup on %s", *av); 4895 __PAST_END(c->d, 1) = j; // i converted to option 4896 av++; 4897 4898 if ((j = pack_table(tstate, *av)) == 0) 4899 errx(EX_DATAERR, "Invalid table name: %s", *av); 4900 4901 cmd->arg1 = j; 4902 av++; 4903 } 4904 break; 4905 case TOK_FLOW: 4906 NEED1("missing table name"); 4907 if (strncmp(*av, "table(", 6) != 0) 4908 errx(EX_DATAERR, 4909 "enclose table name into \"table()\""); 4910 fill_table(cmd, *av, O_IP_FLOW_LOOKUP, tstate); 4911 av++; 4912 break; 4913 4914 case TOK_SKIPACTION: 4915 if (have_skipcmd) 4916 errx(EX_USAGE, "only one defer-action " 4917 "is allowed"); 4918 have_skipcmd = cmd; 4919 fill_cmd(cmd, O_SKIP_ACTION, 0, 0); 4920 break; 4921 4922 default: 4923 errx(EX_USAGE, "unrecognised option [%d] %s\n", i, s); 4924 } 4925 if (F_LEN(cmd) > 0) { /* prepare to advance */ 4926 prev = cmd; 4927 cmd = next_cmd(cmd, &cblen); 4928 } 4929 } 4930 4931 done: 4932 4933 if (!have_state && have_skipcmd) 4934 warnx("Rule contains \"defer-immediate-action\" " 4935 "and doesn't contain any state-related options."); 4936 4937 /* 4938 * Now copy stuff into the rule. 4939 * If we have a keep-state option, the first instruction 4940 * must be a PROBE_STATE (which is generated here). 4941 * If we have a LOG option, it was stored as the first command, 4942 * and now must be moved to the top of the action part. 4943 */ 4944 dst = (ipfw_insn *)rule->cmd; 4945 4946 /* 4947 * First thing to write into the command stream is the match probability. 4948 */ 4949 if (match_prob != 1) { /* 1 means always match */ 4950 dst->opcode = O_PROB; 4951 dst->len = 2; 4952 *((int32_t *)(dst+1)) = (int32_t)(match_prob * 0x7fffffff); 4953 dst += dst->len; 4954 } 4955 4956 /* 4957 * generate O_PROBE_STATE if necessary 4958 */ 4959 if (have_state && have_state->opcode != O_CHECK_STATE && !have_rstate) { 4960 fill_cmd(dst, O_PROBE_STATE, 0, have_state->arg1); 4961 dst = next_cmd(dst, &rblen); 4962 } 4963 4964 /* 4965 * copy all commands but O_LOG, O_KEEP_STATE, O_LIMIT, O_ALTQ, O_TAG, 4966 * O_SKIP_ACTION 4967 */ 4968 for (src = (ipfw_insn *)cmdbuf; src != cmd; src += i) { 4969 i = F_LEN(src); 4970 CHECK_RBUFLEN(i); 4971 4972 switch (src->opcode) { 4973 case O_LOG: 4974 case O_KEEP_STATE: 4975 case O_LIMIT: 4976 case O_ALTQ: 4977 case O_TAG: 4978 case O_SKIP_ACTION: 4979 break; 4980 default: 4981 bcopy(src, dst, i * sizeof(uint32_t)); 4982 dst += i; 4983 } 4984 } 4985 4986 /* 4987 * put back the have_state command as last opcode 4988 */ 4989 if (have_state && have_state->opcode != O_CHECK_STATE) { 4990 i = F_LEN(have_state); 4991 CHECK_RBUFLEN(i); 4992 bcopy(have_state, dst, i * sizeof(uint32_t)); 4993 dst += i; 4994 } 4995 4996 /* 4997 * put back the have_skipcmd command as very last opcode 4998 */ 4999 if (have_skipcmd) { 5000 i = F_LEN(have_skipcmd); 5001 CHECK_RBUFLEN(i); 5002 bcopy(have_skipcmd, dst, i * sizeof(uint32_t)); 5003 dst += i; 5004 } 5005 5006 /* 5007 * start action section 5008 */ 5009 rule->act_ofs = dst - rule->cmd; 5010 5011 /* put back O_LOG, O_ALTQ, O_TAG if necessary */ 5012 if (have_log) { 5013 i = F_LEN(have_log); 5014 CHECK_RBUFLEN(i); 5015 bcopy(have_log, dst, i * sizeof(uint32_t)); 5016 dst += i; 5017 } 5018 if (have_altq) { 5019 i = F_LEN(have_altq); 5020 CHECK_RBUFLEN(i); 5021 bcopy(have_altq, dst, i * sizeof(uint32_t)); 5022 dst += i; 5023 } 5024 if (have_tag) { 5025 i = F_LEN(have_tag); 5026 CHECK_RBUFLEN(i); 5027 bcopy(have_tag, dst, i * sizeof(uint32_t)); 5028 dst += i; 5029 } 5030 5031 /* 5032 * copy all other actions 5033 */ 5034 for (src = (ipfw_insn *)actbuf; src != action; src += i) { 5035 i = F_LEN(src); 5036 CHECK_RBUFLEN(i); 5037 bcopy(src, dst, i * sizeof(uint32_t)); 5038 dst += i; 5039 } 5040 5041 rule->cmd_len = (uint32_t *)dst - (uint32_t *)(rule->cmd); 5042 *rbufsize = (char *)dst - (char *)rule; 5043 } 5044 5045 static int 5046 compare_ntlv(const void *_a, const void *_b) 5047 { 5048 ipfw_obj_ntlv *a, *b; 5049 5050 a = (ipfw_obj_ntlv *)_a; 5051 b = (ipfw_obj_ntlv *)_b; 5052 5053 if (a->set < b->set) 5054 return (-1); 5055 else if (a->set > b->set) 5056 return (1); 5057 5058 if (a->idx < b->idx) 5059 return (-1); 5060 else if (a->idx > b->idx) 5061 return (1); 5062 5063 if (a->head.type < b->head.type) 5064 return (-1); 5065 else if (a->head.type > b->head.type) 5066 return (1); 5067 5068 return (0); 5069 } 5070 5071 /* 5072 * Provide kernel with sorted list of referenced objects 5073 */ 5074 static void 5075 object_sort_ctlv(ipfw_obj_ctlv *ctlv) 5076 { 5077 5078 qsort(ctlv + 1, ctlv->count, ctlv->objsize, compare_ntlv); 5079 } 5080 5081 struct object_kt { 5082 uint16_t uidx; 5083 uint16_t type; 5084 }; 5085 static int 5086 compare_object_kntlv(const void *k, const void *v) 5087 { 5088 ipfw_obj_ntlv *ntlv; 5089 struct object_kt key; 5090 5091 key = *((struct object_kt *)k); 5092 ntlv = (ipfw_obj_ntlv *)v; 5093 5094 if (key.uidx < ntlv->idx) 5095 return (-1); 5096 else if (key.uidx > ntlv->idx) 5097 return (1); 5098 5099 if (key.type < ntlv->head.type) 5100 return (-1); 5101 else if (key.type > ntlv->head.type) 5102 return (1); 5103 5104 return (0); 5105 } 5106 5107 /* 5108 * Finds object name in @ctlv by @idx and @type. 5109 * Uses the following facts: 5110 * 1) All TLVs are the same size 5111 * 2) Kernel implementation provides already sorted list. 5112 * 5113 * Returns table name or NULL. 5114 */ 5115 static char * 5116 object_search_ctlv(ipfw_obj_ctlv *ctlv, uint16_t idx, uint16_t type) 5117 { 5118 ipfw_obj_ntlv *ntlv; 5119 struct object_kt key; 5120 5121 key.uidx = idx; 5122 key.type = type; 5123 5124 ntlv = bsearch(&key, (ctlv + 1), ctlv->count, ctlv->objsize, 5125 compare_object_kntlv); 5126 5127 if (ntlv != NULL) 5128 return (ntlv->name); 5129 5130 return (NULL); 5131 } 5132 5133 static char * 5134 table_search_ctlv(ipfw_obj_ctlv *ctlv, uint16_t idx) 5135 { 5136 5137 return (object_search_ctlv(ctlv, idx, IPFW_TLV_TBL_NAME)); 5138 } 5139 5140 /* 5141 * Adds one or more rules to ipfw chain. 5142 * Data layout: 5143 * Request: 5144 * [ 5145 * ip_fw3_opheader 5146 * [ ipfw_obj_ctlv(IPFW_TLV_TBL_LIST) ipfw_obj_ntlv x N ] (optional *1) 5147 * [ ipfw_obj_ctlv(IPFW_TLV_RULE_LIST) [ ip_fw_rule ip_fw_insn ] x N ] (*2) (*3) 5148 * ] 5149 * Reply: 5150 * [ 5151 * ip_fw3_opheader 5152 * [ ipfw_obj_ctlv(IPFW_TLV_TBL_LIST) ipfw_obj_ntlv x N ] (optional) 5153 * [ ipfw_obj_ctlv(IPFW_TLV_RULE_LIST) [ ip_fw_rule ip_fw_insn ] x N ] 5154 * ] 5155 * 5156 * Rules in reply are modified to store their actual ruleset number. 5157 * 5158 * (*1) TLVs inside IPFW_TLV_TBL_LIST needs to be sorted ascending 5159 * according to their idx field and there has to be no duplicates. 5160 * (*2) Numbered rules inside IPFW_TLV_RULE_LIST needs to be sorted ascending. 5161 * (*3) Each ip_fw structure needs to be aligned to u64 boundary. 5162 */ 5163 void 5164 ipfw_add(char *av[]) 5165 { 5166 uint32_t rulebuf[1024]; 5167 int rbufsize, default_off, tlen, rlen; 5168 size_t sz; 5169 struct tidx ts; 5170 struct ip_fw_rule *rule; 5171 caddr_t tbuf; 5172 ip_fw3_opheader *op3; 5173 ipfw_obj_ctlv *ctlv, *tstate; 5174 5175 rbufsize = sizeof(rulebuf); 5176 memset(rulebuf, 0, rbufsize); 5177 memset(&ts, 0, sizeof(ts)); 5178 5179 /* Optimize case with no tables */ 5180 default_off = sizeof(ipfw_obj_ctlv) + sizeof(ip_fw3_opheader); 5181 op3 = (ip_fw3_opheader *)rulebuf; 5182 ctlv = (ipfw_obj_ctlv *)(op3 + 1); 5183 rule = (struct ip_fw_rule *)(ctlv + 1); 5184 rbufsize -= default_off; 5185 5186 compile_rule(av, (uint32_t *)rule, &rbufsize, &ts); 5187 /* Align rule size to u64 boundary */ 5188 rlen = roundup2(rbufsize, sizeof(uint64_t)); 5189 5190 tbuf = NULL; 5191 sz = 0; 5192 tstate = NULL; 5193 if (ts.count != 0) { 5194 /* Some tables. We have to alloc more data */ 5195 tlen = ts.count * sizeof(ipfw_obj_ntlv); 5196 sz = default_off + sizeof(ipfw_obj_ctlv) + tlen + rlen; 5197 5198 if ((tbuf = calloc(1, sz)) == NULL) 5199 err(EX_UNAVAILABLE, "malloc() failed for IP_FW_ADD"); 5200 op3 = (ip_fw3_opheader *)tbuf; 5201 /* Tables first */ 5202 ctlv = (ipfw_obj_ctlv *)(op3 + 1); 5203 ctlv->head.type = IPFW_TLV_TBLNAME_LIST; 5204 ctlv->head.length = sizeof(ipfw_obj_ctlv) + tlen; 5205 ctlv->count = ts.count; 5206 ctlv->objsize = sizeof(ipfw_obj_ntlv); 5207 memcpy(ctlv + 1, ts.idx, tlen); 5208 object_sort_ctlv(ctlv); 5209 tstate = ctlv; 5210 /* Rule next */ 5211 ctlv = (ipfw_obj_ctlv *)((caddr_t)ctlv + ctlv->head.length); 5212 ctlv->head.type = IPFW_TLV_RULE_LIST; 5213 ctlv->head.length = sizeof(ipfw_obj_ctlv) + rlen; 5214 ctlv->count = 1; 5215 memcpy(ctlv + 1, rule, rbufsize); 5216 } else { 5217 /* Simply add header */ 5218 sz = rlen + default_off; 5219 memset(ctlv, 0, sizeof(*ctlv)); 5220 ctlv->head.type = IPFW_TLV_RULE_LIST; 5221 ctlv->head.length = sizeof(ipfw_obj_ctlv) + rlen; 5222 ctlv->count = 1; 5223 } 5224 5225 if (do_get3(IP_FW_XADD, op3, &sz) != 0) 5226 err(EX_UNAVAILABLE, "getsockopt(%s)", "IP_FW_XADD"); 5227 5228 if (!co.do_quiet) { 5229 struct format_opts sfo; 5230 struct buf_pr bp; 5231 memset(&sfo, 0, sizeof(sfo)); 5232 sfo.tstate = tstate; 5233 sfo.set_mask = (uint32_t)(-1); 5234 bp_alloc(&bp, 4096); 5235 show_static_rule(&co, &sfo, &bp, rule, NULL); 5236 printf("%s", bp.buf); 5237 bp_free(&bp); 5238 } 5239 5240 if (tbuf != NULL) 5241 free(tbuf); 5242 5243 if (ts.idx != NULL) 5244 free(ts.idx); 5245 } 5246 5247 /* 5248 * clear the counters or the log counters. 5249 * optname has the following values: 5250 * 0 (zero both counters and logging) 5251 * 1 (zero logging only) 5252 */ 5253 void 5254 ipfw_zero(int ac, char *av[], int optname) 5255 { 5256 ipfw_range_tlv rt; 5257 char const *errstr; 5258 char const *name = optname ? "RESETLOG" : "ZERO"; 5259 uint32_t arg; 5260 int failed = EX_OK; 5261 5262 optname = optname ? IP_FW_XRESETLOG : IP_FW_XZERO; 5263 av++; ac--; 5264 5265 if (ac == 0) { 5266 /* clear all entries */ 5267 memset(&rt, 0, sizeof(rt)); 5268 rt.flags = IPFW_RCFLAG_ALL; 5269 if (do_range_cmd(optname, &rt) < 0) 5270 err(EX_UNAVAILABLE, "setsockopt(IP_FW_X%s)", name); 5271 if (!co.do_quiet) 5272 printf("%s.\n", optname == IP_FW_XZERO ? 5273 "Accounting cleared":"Logging counts reset"); 5274 5275 return; 5276 } 5277 5278 while (ac) { 5279 /* Rule number */ 5280 if (isdigit(**av)) { 5281 arg = strtonum(*av, 0, 0xffff, &errstr); 5282 if (errstr) 5283 errx(EX_DATAERR, 5284 "invalid rule number %s\n", *av); 5285 memset(&rt, 0, sizeof(rt)); 5286 rt.start_rule = arg; 5287 rt.end_rule = arg; 5288 rt.flags |= IPFW_RCFLAG_RANGE; 5289 if (co.use_set != 0) { 5290 rt.set = co.use_set - 1; 5291 rt.flags |= IPFW_RCFLAG_SET; 5292 } 5293 if (do_range_cmd(optname, &rt) != 0) { 5294 warn("rule %u: setsockopt(IP_FW_X%s)", 5295 arg, name); 5296 failed = EX_UNAVAILABLE; 5297 } else if (rt.new_set == 0) { 5298 printf("Entry %d not found\n", arg); 5299 failed = EX_UNAVAILABLE; 5300 } else if (!co.do_quiet) 5301 printf("Entry %d %s.\n", arg, 5302 optname == IP_FW_XZERO ? 5303 "cleared" : "logging count reset"); 5304 } else { 5305 errx(EX_USAGE, "invalid rule number ``%s''", *av); 5306 } 5307 av++; ac--; 5308 } 5309 if (failed != EX_OK) 5310 exit(failed); 5311 } 5312 5313 void 5314 ipfw_flush(int force) 5315 { 5316 ipfw_range_tlv rt; 5317 5318 if (!force && !co.do_quiet) { /* need to ask user */ 5319 int c; 5320 5321 printf("Are you sure? [yn] "); 5322 fflush(stdout); 5323 do { 5324 c = toupper(getc(stdin)); 5325 while (c != '\n' && getc(stdin) != '\n') 5326 if (feof(stdin)) 5327 return; /* and do not flush */ 5328 } while (c != 'Y' && c != 'N'); 5329 printf("\n"); 5330 if (c == 'N') /* user said no */ 5331 return; 5332 } 5333 if (co.do_pipe) { 5334 dummynet_flush(); 5335 return; 5336 } 5337 /* `ipfw set N flush` - is the same that `ipfw delete set N` */ 5338 memset(&rt, 0, sizeof(rt)); 5339 if (co.use_set != 0) { 5340 rt.set = co.use_set - 1; 5341 rt.flags = IPFW_RCFLAG_SET; 5342 } else 5343 rt.flags = IPFW_RCFLAG_ALL; 5344 if (do_range_cmd(IP_FW_XDEL, &rt) != 0) 5345 err(EX_UNAVAILABLE, "setsockopt(IP_FW_XDEL)"); 5346 if (!co.do_quiet) 5347 printf("Flushed all %s.\n", co.do_pipe ? "pipes" : "rules"); 5348 } 5349 5350 static struct _s_x intcmds[] = { 5351 { "talist", TOK_TALIST }, 5352 { "iflist", TOK_IFLIST }, 5353 { "olist", TOK_OLIST }, 5354 { "vlist", TOK_VLIST }, 5355 { NULL, 0 } 5356 }; 5357 5358 static struct _s_x otypes[] = { 5359 { "EACTION", IPFW_TLV_EACTION }, 5360 { "DYNSTATE", IPFW_TLV_STATE_NAME }, 5361 { NULL, 0 } 5362 }; 5363 5364 static const char* 5365 lookup_eaction_name(ipfw_obj_ntlv *ntlv, int cnt, uint16_t type) 5366 { 5367 const char *name; 5368 int i; 5369 5370 name = NULL; 5371 for (i = 0; i < cnt; i++) { 5372 if (ntlv[i].head.type != IPFW_TLV_EACTION) 5373 continue; 5374 if (IPFW_TLV_EACTION_NAME(ntlv[i].idx) != type) 5375 continue; 5376 name = ntlv[i].name; 5377 break; 5378 } 5379 return (name); 5380 } 5381 5382 static void 5383 ipfw_list_objects(int ac, char *av[]) 5384 { 5385 ipfw_obj_lheader req, *olh; 5386 ipfw_obj_ntlv *ntlv; 5387 const char *name; 5388 size_t sz; 5389 int i; 5390 5391 memset(&req, 0, sizeof(req)); 5392 sz = sizeof(req); 5393 if (do_get3(IP_FW_DUMP_SRVOBJECTS, &req.opheader, &sz) != 0) 5394 if (errno != ENOMEM) 5395 return; 5396 5397 sz = req.size; 5398 if ((olh = calloc(1, sz)) == NULL) 5399 return; 5400 5401 olh->size = sz; 5402 if (do_get3(IP_FW_DUMP_SRVOBJECTS, &olh->opheader, &sz) != 0) { 5403 free(olh); 5404 return; 5405 } 5406 5407 if (olh->count > 0) 5408 printf("Objects list:\n"); 5409 else 5410 printf("There are no objects\n"); 5411 ntlv = (ipfw_obj_ntlv *)(olh + 1); 5412 for (i = 0; i < olh->count; i++) { 5413 name = match_value(otypes, ntlv->head.type); 5414 if (name == NULL) 5415 name = lookup_eaction_name( 5416 (ipfw_obj_ntlv *)(olh + 1), olh->count, 5417 ntlv->head.type); 5418 if (name == NULL) 5419 printf(" kidx: %4d\ttype: %10d\tname: %s\n", 5420 ntlv->idx, ntlv->head.type, ntlv->name); 5421 else 5422 printf(" kidx: %4d\ttype: %10s\tname: %s\n", 5423 ntlv->idx, name, ntlv->name); 5424 ntlv++; 5425 } 5426 free(olh); 5427 } 5428 5429 void 5430 ipfw_internal_handler(int ac, char *av[]) 5431 { 5432 int tcmd; 5433 5434 ac--; av++; 5435 NEED1("internal cmd required"); 5436 5437 if ((tcmd = match_token(intcmds, *av)) == -1) 5438 errx(EX_USAGE, "invalid internal sub-cmd: %s", *av); 5439 5440 switch (tcmd) { 5441 case TOK_IFLIST: 5442 ipfw_list_tifaces(); 5443 break; 5444 case TOK_TALIST: 5445 ipfw_list_ta(ac, av); 5446 break; 5447 case TOK_OLIST: 5448 ipfw_list_objects(ac, av); 5449 break; 5450 case TOK_VLIST: 5451 ipfw_list_values(ac, av); 5452 break; 5453 } 5454 } 5455 5456 static int 5457 ipfw_get_tracked_ifaces(ipfw_obj_lheader **polh) 5458 { 5459 ipfw_obj_lheader req, *olh; 5460 size_t sz; 5461 5462 memset(&req, 0, sizeof(req)); 5463 sz = sizeof(req); 5464 5465 if (do_get3(IP_FW_XIFLIST, &req.opheader, &sz) != 0) { 5466 if (errno != ENOMEM) 5467 return (errno); 5468 } 5469 5470 sz = req.size; 5471 if ((olh = calloc(1, sz)) == NULL) 5472 return (ENOMEM); 5473 5474 olh->size = sz; 5475 if (do_get3(IP_FW_XIFLIST, &olh->opheader, &sz) != 0) { 5476 free(olh); 5477 return (errno); 5478 } 5479 5480 *polh = olh; 5481 return (0); 5482 } 5483 5484 static int 5485 ifinfo_cmp(const void *a, const void *b) 5486 { 5487 ipfw_iface_info *ia, *ib; 5488 5489 ia = (ipfw_iface_info *)a; 5490 ib = (ipfw_iface_info *)b; 5491 5492 return (stringnum_cmp(ia->ifname, ib->ifname)); 5493 } 5494 5495 /* 5496 * Retrieves table list from kernel, 5497 * optionally sorts it and calls requested function for each table. 5498 * Returns 0 on success. 5499 */ 5500 static void 5501 ipfw_list_tifaces() 5502 { 5503 ipfw_obj_lheader *olh; 5504 ipfw_iface_info *info; 5505 int i, error; 5506 5507 if ((error = ipfw_get_tracked_ifaces(&olh)) != 0) 5508 err(EX_OSERR, "Unable to request ipfw tracked interface list"); 5509 5510 5511 qsort(olh + 1, olh->count, olh->objsize, ifinfo_cmp); 5512 5513 info = (ipfw_iface_info *)(olh + 1); 5514 for (i = 0; i < olh->count; i++) { 5515 if (info->flags & IPFW_IFFLAG_RESOLVED) 5516 printf("%s ifindex: %d refcount: %u changes: %u\n", 5517 info->ifname, info->ifindex, info->refcnt, 5518 info->gencnt); 5519 else 5520 printf("%s ifindex: unresolved refcount: %u changes: %u\n", 5521 info->ifname, info->refcnt, info->gencnt); 5522 info = (ipfw_iface_info *)((caddr_t)info + olh->objsize); 5523 } 5524 5525 free(olh); 5526 } 5527 5528 5529 5530 5531