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 warn("rule %u not available", i); 3275 } 3276 } else if (co.do_pipe) { 3277 exitval = ipfw_delete_pipe(co.do_pipe, i); 3278 } else { 3279 memset(&rt, 0, sizeof(rt)); 3280 if (do_set != 0) { 3281 rt.set = i & 31; 3282 rt.flags = IPFW_RCFLAG_SET; 3283 } else { 3284 rt.start_rule = i & 0xffff; 3285 rt.end_rule = j & 0xffff; 3286 if (rt.start_rule == 0 && rt.end_rule == 0) 3287 rt.flags |= IPFW_RCFLAG_ALL; 3288 else 3289 rt.flags |= IPFW_RCFLAG_RANGE; 3290 if (co.use_set != 0) { 3291 rt.set = co.use_set - 1; 3292 rt.flags |= IPFW_RCFLAG_SET; 3293 } 3294 } 3295 i = do_range_cmd(IP_FW_XDEL, &rt); 3296 if (i != 0) { 3297 exitval = EX_UNAVAILABLE; 3298 warn("rule %u: setsockopt(IP_FW_XDEL)", 3299 rt.start_rule); 3300 } else if (rt.new_set == 0 && do_set == 0) { 3301 exitval = EX_UNAVAILABLE; 3302 if (rt.start_rule != rt.end_rule) 3303 warnx("no rules rules in %u-%u range", 3304 rt.start_rule, rt.end_rule); 3305 else 3306 warnx("rule %u not found", 3307 rt.start_rule); 3308 } 3309 } 3310 } 3311 if (exitval != EX_OK) 3312 exit(exitval); 3313 } 3314 3315 3316 /* 3317 * fill the interface structure. We do not check the name as we can 3318 * create interfaces dynamically, so checking them at insert time 3319 * makes relatively little sense. 3320 * Interface names containing '*', '?', or '[' are assumed to be shell 3321 * patterns which match interfaces. 3322 */ 3323 static void 3324 fill_iface(ipfw_insn_if *cmd, char *arg, int cblen, struct tidx *tstate) 3325 { 3326 char *p; 3327 uint16_t uidx; 3328 3329 cmd->name[0] = '\0'; 3330 cmd->o.len |= F_INSN_SIZE(ipfw_insn_if); 3331 3332 CHECK_CMDLEN; 3333 3334 /* Parse the interface or address */ 3335 if (strcmp(arg, "any") == 0) 3336 cmd->o.len = 0; /* effectively ignore this command */ 3337 else if (strncmp(arg, "table(", 6) == 0) { 3338 if ((p = strchr(arg + 6, ')')) == NULL) 3339 errx(EX_DATAERR, "forgotten parenthesis: '%s'", arg); 3340 *p = '\0'; 3341 p = strchr(arg + 6, ','); 3342 if (p) 3343 *p++ = '\0'; 3344 if ((uidx = pack_table(tstate, arg + 6)) == 0) 3345 errx(EX_DATAERR, "Invalid table name: %s", arg + 6); 3346 3347 cmd->name[0] = '\1'; /* Special value indicating table */ 3348 cmd->p.kidx = uidx; 3349 } else if (!isdigit(*arg)) { 3350 strlcpy(cmd->name, arg, sizeof(cmd->name)); 3351 cmd->p.glob = strpbrk(arg, "*?[") != NULL ? 1 : 0; 3352 } else if (!inet_aton(arg, &cmd->p.ip)) 3353 errx(EX_DATAERR, "bad ip address ``%s''", arg); 3354 } 3355 3356 static void 3357 get_mac_addr_mask(const char *p, uint8_t *addr, uint8_t *mask) 3358 { 3359 int i; 3360 size_t l; 3361 char *ap, *ptr, *optr; 3362 struct ether_addr *mac; 3363 const char *macset = "0123456789abcdefABCDEF:"; 3364 3365 if (strcmp(p, "any") == 0) { 3366 for (i = 0; i < ETHER_ADDR_LEN; i++) 3367 addr[i] = mask[i] = 0; 3368 return; 3369 } 3370 3371 optr = ptr = strdup(p); 3372 if ((ap = strsep(&ptr, "&/")) != NULL && *ap != 0) { 3373 l = strlen(ap); 3374 if (strspn(ap, macset) != l || (mac = ether_aton(ap)) == NULL) 3375 errx(EX_DATAERR, "Incorrect MAC address"); 3376 bcopy(mac, addr, ETHER_ADDR_LEN); 3377 } else 3378 errx(EX_DATAERR, "Incorrect MAC address"); 3379 3380 if (ptr != NULL) { /* we have mask? */ 3381 if (p[ptr - optr - 1] == '/') { /* mask len */ 3382 long ml = strtol(ptr, &ap, 10); 3383 if (*ap != 0 || ml > ETHER_ADDR_LEN * 8 || ml < 0) 3384 errx(EX_DATAERR, "Incorrect mask length"); 3385 for (i = 0; ml > 0 && i < ETHER_ADDR_LEN; ml -= 8, i++) 3386 mask[i] = (ml >= 8) ? 0xff: (~0) << (8 - ml); 3387 } else { /* mask */ 3388 l = strlen(ptr); 3389 if (strspn(ptr, macset) != l || 3390 (mac = ether_aton(ptr)) == NULL) 3391 errx(EX_DATAERR, "Incorrect mask"); 3392 bcopy(mac, mask, ETHER_ADDR_LEN); 3393 } 3394 } else { /* default mask: ff:ff:ff:ff:ff:ff */ 3395 for (i = 0; i < ETHER_ADDR_LEN; i++) 3396 mask[i] = 0xff; 3397 } 3398 for (i = 0; i < ETHER_ADDR_LEN; i++) 3399 addr[i] &= mask[i]; 3400 3401 free(optr); 3402 } 3403 3404 /* 3405 * helper function, updates the pointer to cmd with the length 3406 * of the current command, and also cleans up the first word of 3407 * the new command in case it has been clobbered before. 3408 */ 3409 static ipfw_insn * 3410 next_cmd(ipfw_insn *cmd, int *len) 3411 { 3412 *len -= F_LEN(cmd); 3413 CHECK_LENGTH(*len, 0); 3414 cmd += F_LEN(cmd); 3415 bzero(cmd, sizeof(*cmd)); 3416 return cmd; 3417 } 3418 3419 /* 3420 * Takes arguments and copies them into a comment 3421 */ 3422 static void 3423 fill_comment(ipfw_insn *cmd, char **av, int cblen) 3424 { 3425 int i, l; 3426 char *p = (char *)(cmd + 1); 3427 3428 cmd->opcode = O_NOP; 3429 cmd->len = (cmd->len & (F_NOT | F_OR)); 3430 3431 /* Compute length of comment string. */ 3432 for (i = 0, l = 0; av[i] != NULL; i++) 3433 l += strlen(av[i]) + 1; 3434 if (l == 0) 3435 return; 3436 if (l > 84) 3437 errx(EX_DATAERR, 3438 "comment too long (max 80 chars)"); 3439 l = 1 + (l+3)/4; 3440 cmd->len = (cmd->len & (F_NOT | F_OR)) | l; 3441 CHECK_CMDLEN; 3442 3443 for (i = 0; av[i] != NULL; i++) { 3444 strcpy(p, av[i]); 3445 p += strlen(av[i]); 3446 *p++ = ' '; 3447 } 3448 *(--p) = '\0'; 3449 } 3450 3451 /* 3452 * A function to fill simple commands of size 1. 3453 * Existing flags are preserved. 3454 */ 3455 static void 3456 fill_cmd(ipfw_insn *cmd, enum ipfw_opcodes opcode, int flags, uint16_t arg) 3457 { 3458 cmd->opcode = opcode; 3459 cmd->len = ((cmd->len | flags) & (F_NOT | F_OR)) | 1; 3460 cmd->arg1 = arg; 3461 } 3462 3463 /* 3464 * Fetch and add the MAC address and type, with masks. This generates one or 3465 * two microinstructions, and returns the pointer to the last one. 3466 */ 3467 static ipfw_insn * 3468 add_mac(ipfw_insn *cmd, char *av[], int cblen) 3469 { 3470 ipfw_insn_mac *mac; 3471 3472 if ( ( av[0] == NULL ) || ( av[1] == NULL ) ) 3473 errx(EX_DATAERR, "MAC dst src"); 3474 3475 cmd->opcode = O_MACADDR2; 3476 cmd->len = (cmd->len & (F_NOT | F_OR)) | F_INSN_SIZE(ipfw_insn_mac); 3477 CHECK_CMDLEN; 3478 3479 mac = (ipfw_insn_mac *)cmd; 3480 get_mac_addr_mask(av[0], mac->addr, mac->mask); /* dst */ 3481 get_mac_addr_mask(av[1], &(mac->addr[ETHER_ADDR_LEN]), 3482 &(mac->mask[ETHER_ADDR_LEN])); /* src */ 3483 return cmd; 3484 } 3485 3486 static ipfw_insn * 3487 add_mactype(ipfw_insn *cmd, char *av, int cblen) 3488 { 3489 if (!av) 3490 errx(EX_DATAERR, "missing MAC type"); 3491 if (strcmp(av, "any") != 0) { /* we have a non-null type */ 3492 fill_newports((ipfw_insn_u16 *)cmd, av, IPPROTO_ETHERTYPE, 3493 cblen); 3494 cmd->opcode = O_MAC_TYPE; 3495 return cmd; 3496 } else 3497 return NULL; 3498 } 3499 3500 static ipfw_insn * 3501 add_proto0(ipfw_insn *cmd, char *av, u_char *protop) 3502 { 3503 struct protoent *pe; 3504 char *ep; 3505 int proto; 3506 3507 proto = strtol(av, &ep, 10); 3508 if (*ep != '\0' || proto <= 0) { 3509 if ((pe = getprotobyname(av)) == NULL) 3510 return NULL; 3511 proto = pe->p_proto; 3512 } 3513 3514 fill_cmd(cmd, O_PROTO, 0, proto); 3515 *protop = proto; 3516 return cmd; 3517 } 3518 3519 static ipfw_insn * 3520 add_proto(ipfw_insn *cmd, char *av, u_char *protop) 3521 { 3522 u_char proto = IPPROTO_IP; 3523 3524 if (_substrcmp(av, "all") == 0 || strcmp(av, "ip") == 0) 3525 ; /* do not set O_IP4 nor O_IP6 */ 3526 else if (strcmp(av, "ip4") == 0) 3527 /* explicit "just IPv4" rule */ 3528 fill_cmd(cmd, O_IP4, 0, 0); 3529 else if (strcmp(av, "ip6") == 0) { 3530 /* explicit "just IPv6" rule */ 3531 proto = IPPROTO_IPV6; 3532 fill_cmd(cmd, O_IP6, 0, 0); 3533 } else 3534 return add_proto0(cmd, av, protop); 3535 3536 *protop = proto; 3537 return cmd; 3538 } 3539 3540 static ipfw_insn * 3541 add_proto_compat(ipfw_insn *cmd, char *av, u_char *protop) 3542 { 3543 u_char proto = IPPROTO_IP; 3544 3545 if (_substrcmp(av, "all") == 0 || strcmp(av, "ip") == 0) 3546 ; /* do not set O_IP4 nor O_IP6 */ 3547 else if (strcmp(av, "ipv4") == 0 || strcmp(av, "ip4") == 0) 3548 /* explicit "just IPv4" rule */ 3549 fill_cmd(cmd, O_IP4, 0, 0); 3550 else if (strcmp(av, "ipv6") == 0 || strcmp(av, "ip6") == 0) { 3551 /* explicit "just IPv6" rule */ 3552 proto = IPPROTO_IPV6; 3553 fill_cmd(cmd, O_IP6, 0, 0); 3554 } else 3555 return add_proto0(cmd, av, protop); 3556 3557 *protop = proto; 3558 return cmd; 3559 } 3560 3561 static ipfw_insn * 3562 add_srcip(ipfw_insn *cmd, char *av, int cblen, struct tidx *tstate) 3563 { 3564 fill_ip((ipfw_insn_ip *)cmd, av, cblen, tstate); 3565 if (cmd->opcode == O_IP_DST_SET) /* set */ 3566 cmd->opcode = O_IP_SRC_SET; 3567 else if (cmd->opcode == O_IP_DST_LOOKUP) /* table */ 3568 cmd->opcode = O_IP_SRC_LOOKUP; 3569 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn)) /* me */ 3570 cmd->opcode = O_IP_SRC_ME; 3571 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_u32)) /* one IP */ 3572 cmd->opcode = O_IP_SRC; 3573 else /* addr/mask */ 3574 cmd->opcode = O_IP_SRC_MASK; 3575 return cmd; 3576 } 3577 3578 static ipfw_insn * 3579 add_dstip(ipfw_insn *cmd, char *av, int cblen, struct tidx *tstate) 3580 { 3581 fill_ip((ipfw_insn_ip *)cmd, av, cblen, tstate); 3582 if (cmd->opcode == O_IP_DST_SET) /* set */ 3583 ; 3584 else if (cmd->opcode == O_IP_DST_LOOKUP) /* table */ 3585 ; 3586 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn)) /* me */ 3587 cmd->opcode = O_IP_DST_ME; 3588 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_u32)) /* one IP */ 3589 cmd->opcode = O_IP_DST; 3590 else /* addr/mask */ 3591 cmd->opcode = O_IP_DST_MASK; 3592 return cmd; 3593 } 3594 3595 static struct _s_x f_reserved_keywords[] = { 3596 { "altq", TOK_OR }, 3597 { "//", TOK_OR }, 3598 { "diverted", TOK_OR }, 3599 { "dst-port", TOK_OR }, 3600 { "src-port", TOK_OR }, 3601 { "established", TOK_OR }, 3602 { "keep-state", TOK_OR }, 3603 { "frag", TOK_OR }, 3604 { "icmptypes", TOK_OR }, 3605 { "in", TOK_OR }, 3606 { "out", TOK_OR }, 3607 { "ip6", TOK_OR }, 3608 { "any", TOK_OR }, 3609 { "to", TOK_OR }, 3610 { "via", TOK_OR }, 3611 { "{", TOK_OR }, 3612 { NULL, 0 } /* terminator */ 3613 }; 3614 3615 static ipfw_insn * 3616 add_ports(ipfw_insn *cmd, char *av, u_char proto, int opcode, int cblen) 3617 { 3618 3619 if (match_token(f_reserved_keywords, av) != -1) 3620 return (NULL); 3621 3622 if (fill_newports((ipfw_insn_u16 *)cmd, av, proto, cblen)) { 3623 /* XXX todo: check that we have a protocol with ports */ 3624 cmd->opcode = opcode; 3625 return cmd; 3626 } 3627 return NULL; 3628 } 3629 3630 static ipfw_insn * 3631 add_src(ipfw_insn *cmd, char *av, u_char proto, int cblen, struct tidx *tstate) 3632 { 3633 struct in6_addr a; 3634 char *host, *ch, buf[INET6_ADDRSTRLEN]; 3635 ipfw_insn *ret = NULL; 3636 int len; 3637 3638 /* Copy first address in set if needed */ 3639 if ((ch = strpbrk(av, "/,")) != NULL) { 3640 len = ch - av; 3641 strlcpy(buf, av, sizeof(buf)); 3642 if (len < sizeof(buf)) 3643 buf[len] = '\0'; 3644 host = buf; 3645 } else 3646 host = av; 3647 3648 if (proto == IPPROTO_IPV6 || strcmp(av, "me6") == 0 || 3649 inet_pton(AF_INET6, host, &a) == 1) 3650 ret = add_srcip6(cmd, av, cblen, tstate); 3651 /* XXX: should check for IPv4, not !IPv6 */ 3652 if (ret == NULL && (proto == IPPROTO_IP || strcmp(av, "me") == 0 || 3653 inet_pton(AF_INET6, host, &a) != 1)) 3654 ret = add_srcip(cmd, av, cblen, tstate); 3655 if (ret == NULL && strcmp(av, "any") != 0) 3656 ret = cmd; 3657 3658 return ret; 3659 } 3660 3661 static ipfw_insn * 3662 add_dst(ipfw_insn *cmd, char *av, u_char proto, int cblen, struct tidx *tstate) 3663 { 3664 struct in6_addr a; 3665 char *host, *ch, buf[INET6_ADDRSTRLEN]; 3666 ipfw_insn *ret = NULL; 3667 int len; 3668 3669 /* Copy first address in set if needed */ 3670 if ((ch = strpbrk(av, "/,")) != NULL) { 3671 len = ch - av; 3672 strlcpy(buf, av, sizeof(buf)); 3673 if (len < sizeof(buf)) 3674 buf[len] = '\0'; 3675 host = buf; 3676 } else 3677 host = av; 3678 3679 if (proto == IPPROTO_IPV6 || strcmp(av, "me6") == 0 || 3680 inet_pton(AF_INET6, host, &a) == 1) 3681 ret = add_dstip6(cmd, av, cblen, tstate); 3682 /* XXX: should check for IPv4, not !IPv6 */ 3683 if (ret == NULL && (proto == IPPROTO_IP || strcmp(av, "me") == 0 || 3684 inet_pton(AF_INET6, host, &a) != 1)) 3685 ret = add_dstip(cmd, av, cblen, tstate); 3686 if (ret == NULL && strcmp(av, "any") != 0) 3687 ret = cmd; 3688 3689 return ret; 3690 } 3691 3692 /* 3693 * Parse arguments and assemble the microinstructions which make up a rule. 3694 * Rules are added into the 'rulebuf' and then copied in the correct order 3695 * into the actual rule. 3696 * 3697 * The syntax for a rule starts with the action, followed by 3698 * optional action parameters, and the various match patterns. 3699 * In the assembled microcode, the first opcode must be an O_PROBE_STATE 3700 * (generated if the rule includes a keep-state option), then the 3701 * various match patterns, log/altq actions, and the actual action. 3702 * 3703 */ 3704 void 3705 compile_rule(char *av[], uint32_t *rbuf, int *rbufsize, struct tidx *tstate) 3706 { 3707 /* 3708 * rules are added into the 'rulebuf' and then copied in 3709 * the correct order into the actual rule. 3710 * Some things that need to go out of order (prob, action etc.) 3711 * go into actbuf[]. 3712 */ 3713 static uint32_t actbuf[255], cmdbuf[255]; 3714 int rblen, ablen, cblen; 3715 3716 ipfw_insn *src, *dst, *cmd, *action, *prev=NULL; 3717 ipfw_insn *first_cmd; /* first match pattern */ 3718 3719 struct ip_fw_rule *rule; 3720 3721 /* 3722 * various flags used to record that we entered some fields. 3723 */ 3724 ipfw_insn *have_state = NULL; /* any state-related option */ 3725 int have_rstate = 0; 3726 ipfw_insn *have_log = NULL, *have_altq = NULL, *have_tag = NULL; 3727 ipfw_insn *have_skipcmd = NULL; 3728 size_t len; 3729 3730 int i; 3731 3732 int open_par = 0; /* open parenthesis ( */ 3733 3734 /* proto is here because it is used to fetch ports */ 3735 u_char proto = IPPROTO_IP; /* default protocol */ 3736 3737 double match_prob = 1; /* match probability, default is always match */ 3738 3739 bzero(actbuf, sizeof(actbuf)); /* actions go here */ 3740 bzero(cmdbuf, sizeof(cmdbuf)); 3741 bzero(rbuf, *rbufsize); 3742 3743 rule = (struct ip_fw_rule *)rbuf; 3744 cmd = (ipfw_insn *)cmdbuf; 3745 action = (ipfw_insn *)actbuf; 3746 3747 rblen = *rbufsize / sizeof(uint32_t); 3748 rblen -= sizeof(struct ip_fw_rule) / sizeof(uint32_t); 3749 ablen = sizeof(actbuf) / sizeof(actbuf[0]); 3750 cblen = sizeof(cmdbuf) / sizeof(cmdbuf[0]); 3751 cblen -= F_INSN_SIZE(ipfw_insn_u32) + 1; 3752 3753 #define CHECK_RBUFLEN(len) { CHECK_LENGTH(rblen, len); rblen -= len; } 3754 #define CHECK_ACTLEN CHECK_LENGTH(ablen, action->len) 3755 3756 av++; 3757 3758 /* [rule N] -- Rule number optional */ 3759 if (av[0] && isdigit(**av)) { 3760 rule->rulenum = atoi(*av); 3761 av++; 3762 } 3763 3764 /* [set N] -- set number (0..RESVD_SET), optional */ 3765 if (av[0] && av[1] && _substrcmp(*av, "set") == 0) { 3766 int set = strtoul(av[1], NULL, 10); 3767 if (set < 0 || set > RESVD_SET) 3768 errx(EX_DATAERR, "illegal set %s", av[1]); 3769 rule->set = set; 3770 tstate->set = set; 3771 av += 2; 3772 } 3773 3774 /* [prob D] -- match probability, optional */ 3775 if (av[0] && av[1] && _substrcmp(*av, "prob") == 0) { 3776 match_prob = strtod(av[1], NULL); 3777 3778 if (match_prob <= 0 || match_prob > 1) 3779 errx(EX_DATAERR, "illegal match prob. %s", av[1]); 3780 av += 2; 3781 } 3782 3783 /* action -- mandatory */ 3784 NEED1("missing action"); 3785 i = match_token(rule_actions, *av); 3786 av++; 3787 action->len = 1; /* default */ 3788 CHECK_ACTLEN; 3789 switch(i) { 3790 case TOK_CHECKSTATE: 3791 have_state = action; 3792 action->opcode = O_CHECK_STATE; 3793 if (*av == NULL || 3794 match_token(rule_options, *av) == TOK_COMMENT) { 3795 action->arg1 = pack_object(tstate, 3796 default_state_name, IPFW_TLV_STATE_NAME); 3797 break; 3798 } 3799 if (*av[0] == ':') { 3800 if (strcmp(*av + 1, "any") == 0) 3801 action->arg1 = 0; 3802 else if (state_check_name(*av + 1) == 0) 3803 action->arg1 = pack_object(tstate, *av + 1, 3804 IPFW_TLV_STATE_NAME); 3805 else 3806 errx(EX_DATAERR, "Invalid state name %s", 3807 *av); 3808 av++; 3809 break; 3810 } 3811 errx(EX_DATAERR, "Invalid state name %s", *av); 3812 break; 3813 3814 case TOK_ABORT: 3815 action->opcode = O_REJECT; 3816 action->arg1 = ICMP_REJECT_ABORT; 3817 break; 3818 3819 case TOK_ABORT6: 3820 action->opcode = O_UNREACH6; 3821 action->arg1 = ICMP6_UNREACH_ABORT; 3822 break; 3823 3824 case TOK_ACCEPT: 3825 action->opcode = O_ACCEPT; 3826 break; 3827 3828 case TOK_DENY: 3829 action->opcode = O_DENY; 3830 action->arg1 = 0; 3831 break; 3832 3833 case TOK_REJECT: 3834 action->opcode = O_REJECT; 3835 action->arg1 = ICMP_UNREACH_HOST; 3836 break; 3837 3838 case TOK_RESET: 3839 action->opcode = O_REJECT; 3840 action->arg1 = ICMP_REJECT_RST; 3841 break; 3842 3843 case TOK_RESET6: 3844 action->opcode = O_UNREACH6; 3845 action->arg1 = ICMP6_UNREACH_RST; 3846 break; 3847 3848 case TOK_UNREACH: 3849 action->opcode = O_REJECT; 3850 NEED1("missing reject code"); 3851 fill_reject_code(&action->arg1, *av); 3852 av++; 3853 break; 3854 3855 case TOK_UNREACH6: 3856 action->opcode = O_UNREACH6; 3857 NEED1("missing unreach code"); 3858 fill_unreach6_code(&action->arg1, *av); 3859 av++; 3860 break; 3861 3862 case TOK_COUNT: 3863 action->opcode = O_COUNT; 3864 break; 3865 3866 case TOK_NAT: 3867 action->opcode = O_NAT; 3868 action->len = F_INSN_SIZE(ipfw_insn_nat); 3869 CHECK_ACTLEN; 3870 if (*av != NULL && _substrcmp(*av, "global") == 0) { 3871 action->arg1 = IP_FW_NAT44_GLOBAL; 3872 av++; 3873 break; 3874 } else 3875 goto chkarg; 3876 case TOK_QUEUE: 3877 action->opcode = O_QUEUE; 3878 goto chkarg; 3879 case TOK_PIPE: 3880 action->opcode = O_PIPE; 3881 goto chkarg; 3882 case TOK_SKIPTO: 3883 action->opcode = O_SKIPTO; 3884 goto chkarg; 3885 case TOK_NETGRAPH: 3886 action->opcode = O_NETGRAPH; 3887 goto chkarg; 3888 case TOK_NGTEE: 3889 action->opcode = O_NGTEE; 3890 goto chkarg; 3891 case TOK_DIVERT: 3892 action->opcode = O_DIVERT; 3893 goto chkarg; 3894 case TOK_TEE: 3895 action->opcode = O_TEE; 3896 goto chkarg; 3897 case TOK_CALL: 3898 action->opcode = O_CALLRETURN; 3899 chkarg: 3900 if (!av[0]) 3901 errx(EX_USAGE, "missing argument for %s", *(av - 1)); 3902 if (isdigit(**av)) { 3903 action->arg1 = strtoul(*av, NULL, 10); 3904 if (action->arg1 <= 0 || action->arg1 >= IP_FW_TABLEARG) 3905 errx(EX_DATAERR, "illegal argument for %s", 3906 *(av - 1)); 3907 } else if (_substrcmp(*av, "tablearg") == 0) { 3908 action->arg1 = IP_FW_TARG; 3909 } else if (i == TOK_DIVERT || i == TOK_TEE) { 3910 struct servent *s; 3911 setservent(1); 3912 s = getservbyname(av[0], "divert"); 3913 if (s != NULL) 3914 action->arg1 = ntohs(s->s_port); 3915 else 3916 errx(EX_DATAERR, "illegal divert/tee port"); 3917 } else 3918 errx(EX_DATAERR, "illegal argument for %s", *(av - 1)); 3919 av++; 3920 break; 3921 3922 case TOK_FORWARD: { 3923 /* 3924 * Locate the address-port separator (':' or ','). 3925 * Could be one of the following: 3926 * hostname:port 3927 * IPv4 a.b.c.d,port 3928 * IPv4 a.b.c.d:port 3929 * IPv6 w:x:y::z,port 3930 * The ':' can only be used with hostname and IPv4 address. 3931 * XXX-BZ Should we also support [w:x:y::z]:port? 3932 */ 3933 struct sockaddr_storage result; 3934 struct addrinfo *res; 3935 char *s, *end; 3936 int family; 3937 u_short port_number; 3938 3939 NEED1("missing forward address[:port]"); 3940 3941 /* 3942 * locate the address-port separator (':' or ',') 3943 */ 3944 s = strchr(*av, ','); 3945 if (s == NULL) { 3946 /* Distinguish between IPv4:port and IPv6 cases. */ 3947 s = strchr(*av, ':'); 3948 if (s && strchr(s+1, ':')) 3949 s = NULL; /* no port */ 3950 } 3951 3952 port_number = 0; 3953 if (s != NULL) { 3954 /* Terminate host portion and set s to start of port. */ 3955 *(s++) = '\0'; 3956 i = strtoport(s, &end, 0 /* base */, 0 /* proto */); 3957 if (s == end) 3958 errx(EX_DATAERR, 3959 "illegal forwarding port ``%s''", s); 3960 port_number = (u_short)i; 3961 } 3962 3963 if (_substrcmp(*av, "tablearg") == 0) { 3964 family = PF_INET; 3965 ((struct sockaddr_in*)&result)->sin_addr.s_addr = 3966 INADDR_ANY; 3967 } else { 3968 /* 3969 * Resolve the host name or address to a family and a 3970 * network representation of the address. 3971 */ 3972 if (getaddrinfo(*av, NULL, NULL, &res)) 3973 errx(EX_DATAERR, NULL); 3974 /* Just use the first host in the answer. */ 3975 family = res->ai_family; 3976 memcpy(&result, res->ai_addr, res->ai_addrlen); 3977 freeaddrinfo(res); 3978 } 3979 3980 if (family == PF_INET) { 3981 ipfw_insn_sa *p = (ipfw_insn_sa *)action; 3982 3983 action->opcode = O_FORWARD_IP; 3984 action->len = F_INSN_SIZE(ipfw_insn_sa); 3985 CHECK_ACTLEN; 3986 3987 /* 3988 * In the kernel we assume AF_INET and use only 3989 * sin_port and sin_addr. Remember to set sin_len as 3990 * the routing code seems to use it too. 3991 */ 3992 p->sa.sin_len = sizeof(struct sockaddr_in); 3993 p->sa.sin_family = AF_INET; 3994 p->sa.sin_port = port_number; 3995 p->sa.sin_addr.s_addr = 3996 ((struct sockaddr_in *)&result)->sin_addr.s_addr; 3997 } else if (family == PF_INET6) { 3998 ipfw_insn_sa6 *p = (ipfw_insn_sa6 *)action; 3999 4000 action->opcode = O_FORWARD_IP6; 4001 action->len = F_INSN_SIZE(ipfw_insn_sa6); 4002 CHECK_ACTLEN; 4003 4004 p->sa.sin6_len = sizeof(struct sockaddr_in6); 4005 p->sa.sin6_family = AF_INET6; 4006 p->sa.sin6_port = port_number; 4007 p->sa.sin6_flowinfo = 0; 4008 p->sa.sin6_scope_id = 4009 ((struct sockaddr_in6 *)&result)->sin6_scope_id; 4010 bcopy(&((struct sockaddr_in6*)&result)->sin6_addr, 4011 &p->sa.sin6_addr, sizeof(p->sa.sin6_addr)); 4012 } else { 4013 errx(EX_DATAERR, "Invalid address family in forward action"); 4014 } 4015 av++; 4016 break; 4017 } 4018 case TOK_COMMENT: 4019 /* pretend it is a 'count' rule followed by the comment */ 4020 action->opcode = O_COUNT; 4021 av--; /* go back... */ 4022 break; 4023 4024 case TOK_SETFIB: 4025 { 4026 int numfibs; 4027 size_t intsize = sizeof(int); 4028 4029 action->opcode = O_SETFIB; 4030 NEED1("missing fib number"); 4031 if (_substrcmp(*av, "tablearg") == 0) { 4032 action->arg1 = IP_FW_TARG; 4033 } else { 4034 action->arg1 = strtoul(*av, NULL, 10); 4035 if (sysctlbyname("net.fibs", &numfibs, &intsize, 4036 NULL, 0) == -1) 4037 errx(EX_DATAERR, "fibs not suported.\n"); 4038 if (action->arg1 >= numfibs) /* Temporary */ 4039 errx(EX_DATAERR, "fib too large.\n"); 4040 /* Add high-order bit to fib to make room for tablearg*/ 4041 action->arg1 |= 0x8000; 4042 } 4043 av++; 4044 break; 4045 } 4046 4047 case TOK_SETDSCP: 4048 { 4049 int code; 4050 4051 action->opcode = O_SETDSCP; 4052 NEED1("missing DSCP code"); 4053 if (_substrcmp(*av, "tablearg") == 0) { 4054 action->arg1 = IP_FW_TARG; 4055 } else { 4056 if (isalpha(*av[0])) { 4057 if ((code = match_token(f_ipdscp, *av)) == -1) 4058 errx(EX_DATAERR, "Unknown DSCP code"); 4059 action->arg1 = code; 4060 } else 4061 action->arg1 = strtoul(*av, NULL, 10); 4062 /* 4063 * Add high-order bit to DSCP to make room 4064 * for tablearg 4065 */ 4066 action->arg1 |= 0x8000; 4067 } 4068 av++; 4069 break; 4070 } 4071 4072 case TOK_REASS: 4073 action->opcode = O_REASS; 4074 break; 4075 4076 case TOK_RETURN: 4077 fill_cmd(action, O_CALLRETURN, F_NOT, 0); 4078 break; 4079 4080 case TOK_TCPSETMSS: { 4081 u_long mss; 4082 uint16_t idx; 4083 4084 idx = pack_object(tstate, "tcp-setmss", IPFW_TLV_EACTION); 4085 if (idx == 0) 4086 errx(EX_DATAERR, "pack_object failed"); 4087 fill_cmd(action, O_EXTERNAL_ACTION, 0, idx); 4088 NEED1("Missing MSS value"); 4089 action = next_cmd(action, &ablen); 4090 action->len = 1; 4091 CHECK_ACTLEN; 4092 mss = strtoul(*av, NULL, 10); 4093 if (mss == 0 || mss > UINT16_MAX) 4094 errx(EX_USAGE, "invalid MSS value %s", *av); 4095 fill_cmd(action, O_EXTERNAL_DATA, 0, (uint16_t)mss); 4096 av++; 4097 break; 4098 } 4099 4100 default: 4101 av--; 4102 if (match_token(rule_eactions, *av) == -1) 4103 errx(EX_DATAERR, "invalid action %s\n", *av); 4104 /* 4105 * External actions support. 4106 * XXX: we support only syntax with instance name. 4107 * For known external actions (from rule_eactions list) 4108 * we can handle syntax directly. But with `eaction' 4109 * keyword we can use only `eaction <name> <instance>' 4110 * syntax. 4111 */ 4112 case TOK_EACTION: { 4113 uint16_t idx; 4114 4115 NEED1("Missing eaction name"); 4116 if (eaction_check_name(*av) != 0) 4117 errx(EX_DATAERR, "Invalid eaction name %s", *av); 4118 idx = pack_object(tstate, *av, IPFW_TLV_EACTION); 4119 if (idx == 0) 4120 errx(EX_DATAERR, "pack_object failed"); 4121 fill_cmd(action, O_EXTERNAL_ACTION, 0, idx); 4122 av++; 4123 NEED1("Missing eaction instance name"); 4124 action = next_cmd(action, &ablen); 4125 action->len = 1; 4126 CHECK_ACTLEN; 4127 if (eaction_check_name(*av) != 0) 4128 errx(EX_DATAERR, "Invalid eaction instance name %s", 4129 *av); 4130 /* 4131 * External action instance object has TLV type depended 4132 * from the external action name object index. Since we 4133 * currently don't know this index, use zero as TLV type. 4134 */ 4135 idx = pack_object(tstate, *av, 0); 4136 if (idx == 0) 4137 errx(EX_DATAERR, "pack_object failed"); 4138 fill_cmd(action, O_EXTERNAL_INSTANCE, 0, idx); 4139 av++; 4140 } 4141 } 4142 action = next_cmd(action, &ablen); 4143 4144 /* 4145 * [altq queuename] -- altq tag, optional 4146 * [log [logamount N]] -- log, optional 4147 * 4148 * If they exist, it go first in the cmdbuf, but then it is 4149 * skipped in the copy section to the end of the buffer. 4150 */ 4151 while (av[0] != NULL && (i = match_token(rule_action_params, *av)) != -1) { 4152 av++; 4153 switch (i) { 4154 case TOK_LOG: 4155 { 4156 ipfw_insn_log *c = (ipfw_insn_log *)cmd; 4157 int l; 4158 4159 if (have_log) 4160 errx(EX_DATAERR, 4161 "log cannot be specified more than once"); 4162 have_log = (ipfw_insn *)c; 4163 cmd->len = F_INSN_SIZE(ipfw_insn_log); 4164 CHECK_CMDLEN; 4165 cmd->opcode = O_LOG; 4166 if (av[0] && _substrcmp(*av, "logamount") == 0) { 4167 av++; 4168 NEED1("logamount requires argument"); 4169 l = atoi(*av); 4170 if (l < 0) 4171 errx(EX_DATAERR, 4172 "logamount must be positive"); 4173 c->max_log = l; 4174 av++; 4175 } else { 4176 len = sizeof(c->max_log); 4177 if (sysctlbyname("net.inet.ip.fw.verbose_limit", 4178 &c->max_log, &len, NULL, 0) == -1) { 4179 if (co.test_only) { 4180 c->max_log = 0; 4181 break; 4182 } 4183 errx(1, "sysctlbyname(\"%s\")", 4184 "net.inet.ip.fw.verbose_limit"); 4185 } 4186 } 4187 } 4188 break; 4189 4190 #ifndef NO_ALTQ 4191 case TOK_ALTQ: 4192 { 4193 ipfw_insn_altq *a = (ipfw_insn_altq *)cmd; 4194 4195 NEED1("missing altq queue name"); 4196 if (have_altq) 4197 errx(EX_DATAERR, 4198 "altq cannot be specified more than once"); 4199 have_altq = (ipfw_insn *)a; 4200 cmd->len = F_INSN_SIZE(ipfw_insn_altq); 4201 CHECK_CMDLEN; 4202 cmd->opcode = O_ALTQ; 4203 a->qid = altq_name_to_qid(*av); 4204 av++; 4205 } 4206 break; 4207 #endif 4208 4209 case TOK_TAG: 4210 case TOK_UNTAG: { 4211 uint16_t tag; 4212 4213 if (have_tag) 4214 errx(EX_USAGE, "tag and untag cannot be " 4215 "specified more than once"); 4216 GET_UINT_ARG(tag, IPFW_ARG_MIN, IPFW_ARG_MAX, i, 4217 rule_action_params); 4218 have_tag = cmd; 4219 fill_cmd(cmd, O_TAG, (i == TOK_TAG) ? 0: F_NOT, tag); 4220 av++; 4221 break; 4222 } 4223 4224 default: 4225 abort(); 4226 } 4227 cmd = next_cmd(cmd, &cblen); 4228 } 4229 4230 if (have_state) { /* must be a check-state, we are done */ 4231 if (*av != NULL && 4232 match_token(rule_options, *av) == TOK_COMMENT) { 4233 /* check-state has a comment */ 4234 av++; 4235 fill_comment(cmd, av, cblen); 4236 cmd = next_cmd(cmd, &cblen); 4237 av[0] = NULL; 4238 } 4239 goto done; 4240 } 4241 4242 #define OR_START(target) \ 4243 if (av[0] && (*av[0] == '(' || *av[0] == '{')) { \ 4244 if (open_par) \ 4245 errx(EX_USAGE, "nested \"(\" not allowed\n"); \ 4246 prev = NULL; \ 4247 open_par = 1; \ 4248 if ( (av[0])[1] == '\0') { \ 4249 av++; \ 4250 } else \ 4251 (*av)++; \ 4252 } \ 4253 target: \ 4254 4255 4256 #define CLOSE_PAR \ 4257 if (open_par) { \ 4258 if (av[0] && ( \ 4259 strcmp(*av, ")") == 0 || \ 4260 strcmp(*av, "}") == 0)) { \ 4261 prev = NULL; \ 4262 open_par = 0; \ 4263 av++; \ 4264 } else \ 4265 errx(EX_USAGE, "missing \")\"\n"); \ 4266 } 4267 4268 #define NOT_BLOCK \ 4269 if (av[0] && _substrcmp(*av, "not") == 0) { \ 4270 if (cmd->len & F_NOT) \ 4271 errx(EX_USAGE, "double \"not\" not allowed\n"); \ 4272 cmd->len |= F_NOT; \ 4273 av++; \ 4274 } 4275 4276 #define OR_BLOCK(target) \ 4277 if (av[0] && _substrcmp(*av, "or") == 0) { \ 4278 if (prev == NULL || open_par == 0) \ 4279 errx(EX_DATAERR, "invalid OR block"); \ 4280 prev->len |= F_OR; \ 4281 av++; \ 4282 goto target; \ 4283 } \ 4284 CLOSE_PAR; 4285 4286 first_cmd = cmd; 4287 4288 #if 0 4289 /* 4290 * MAC addresses, optional. 4291 * If we have this, we skip the part "proto from src to dst" 4292 * and jump straight to the option parsing. 4293 */ 4294 NOT_BLOCK; 4295 NEED1("missing protocol"); 4296 if (_substrcmp(*av, "MAC") == 0 || 4297 _substrcmp(*av, "mac") == 0) { 4298 av++; /* the "MAC" keyword */ 4299 add_mac(cmd, av); /* exits in case of errors */ 4300 cmd = next_cmd(cmd); 4301 av += 2; /* dst-mac and src-mac */ 4302 NOT_BLOCK; 4303 NEED1("missing mac type"); 4304 if (add_mactype(cmd, av[0])) 4305 cmd = next_cmd(cmd); 4306 av++; /* any or mac-type */ 4307 goto read_options; 4308 } 4309 #endif 4310 4311 /* 4312 * protocol, mandatory 4313 */ 4314 OR_START(get_proto); 4315 NOT_BLOCK; 4316 NEED1("missing protocol"); 4317 if (add_proto_compat(cmd, *av, &proto)) { 4318 av++; 4319 if (F_LEN(cmd) != 0) { 4320 prev = cmd; 4321 cmd = next_cmd(cmd, &cblen); 4322 } 4323 } else if (first_cmd != cmd) { 4324 errx(EX_DATAERR, "invalid protocol ``%s''", *av); 4325 } else 4326 goto read_options; 4327 OR_BLOCK(get_proto); 4328 4329 /* 4330 * "from", mandatory 4331 */ 4332 if ((av[0] == NULL) || _substrcmp(*av, "from") != 0) 4333 errx(EX_USAGE, "missing ``from''"); 4334 av++; 4335 4336 /* 4337 * source IP, mandatory 4338 */ 4339 OR_START(source_ip); 4340 NOT_BLOCK; /* optional "not" */ 4341 NEED1("missing source address"); 4342 if (add_src(cmd, *av, proto, cblen, tstate)) { 4343 av++; 4344 if (F_LEN(cmd) != 0) { /* ! any */ 4345 prev = cmd; 4346 cmd = next_cmd(cmd, &cblen); 4347 } 4348 } else 4349 errx(EX_USAGE, "bad source address %s", *av); 4350 OR_BLOCK(source_ip); 4351 4352 /* 4353 * source ports, optional 4354 */ 4355 NOT_BLOCK; /* optional "not" */ 4356 if ( av[0] != NULL ) { 4357 if (_substrcmp(*av, "any") == 0 || 4358 add_ports(cmd, *av, proto, O_IP_SRCPORT, cblen)) { 4359 av++; 4360 if (F_LEN(cmd) != 0) 4361 cmd = next_cmd(cmd, &cblen); 4362 } 4363 } 4364 4365 /* 4366 * "to", mandatory 4367 */ 4368 if ( (av[0] == NULL) || _substrcmp(*av, "to") != 0 ) 4369 errx(EX_USAGE, "missing ``to''"); 4370 av++; 4371 4372 /* 4373 * destination, mandatory 4374 */ 4375 OR_START(dest_ip); 4376 NOT_BLOCK; /* optional "not" */ 4377 NEED1("missing dst address"); 4378 if (add_dst(cmd, *av, proto, cblen, tstate)) { 4379 av++; 4380 if (F_LEN(cmd) != 0) { /* ! any */ 4381 prev = cmd; 4382 cmd = next_cmd(cmd, &cblen); 4383 } 4384 } else 4385 errx( EX_USAGE, "bad destination address %s", *av); 4386 OR_BLOCK(dest_ip); 4387 4388 /* 4389 * dest. ports, optional 4390 */ 4391 NOT_BLOCK; /* optional "not" */ 4392 if (av[0]) { 4393 if (_substrcmp(*av, "any") == 0 || 4394 add_ports(cmd, *av, proto, O_IP_DSTPORT, cblen)) { 4395 av++; 4396 if (F_LEN(cmd) != 0) 4397 cmd = next_cmd(cmd, &cblen); 4398 } 4399 } 4400 4401 read_options: 4402 prev = NULL; 4403 while ( av[0] != NULL ) { 4404 char *s; 4405 ipfw_insn_u32 *cmd32; /* alias for cmd */ 4406 4407 s = *av; 4408 cmd32 = (ipfw_insn_u32 *)cmd; 4409 4410 if (*s == '!') { /* alternate syntax for NOT */ 4411 if (cmd->len & F_NOT) 4412 errx(EX_USAGE, "double \"not\" not allowed\n"); 4413 cmd->len = F_NOT; 4414 s++; 4415 } 4416 i = match_token(rule_options, s); 4417 av++; 4418 switch(i) { 4419 case TOK_NOT: 4420 if (cmd->len & F_NOT) 4421 errx(EX_USAGE, "double \"not\" not allowed\n"); 4422 cmd->len = F_NOT; 4423 break; 4424 4425 case TOK_OR: 4426 if (open_par == 0 || prev == NULL) 4427 errx(EX_USAGE, "invalid \"or\" block\n"); 4428 prev->len |= F_OR; 4429 break; 4430 4431 case TOK_STARTBRACE: 4432 if (open_par) 4433 errx(EX_USAGE, "+nested \"(\" not allowed\n"); 4434 open_par = 1; 4435 break; 4436 4437 case TOK_ENDBRACE: 4438 if (!open_par) 4439 errx(EX_USAGE, "+missing \")\"\n"); 4440 open_par = 0; 4441 prev = NULL; 4442 break; 4443 4444 case TOK_IN: 4445 fill_cmd(cmd, O_IN, 0, 0); 4446 break; 4447 4448 case TOK_OUT: 4449 cmd->len ^= F_NOT; /* toggle F_NOT */ 4450 fill_cmd(cmd, O_IN, 0, 0); 4451 break; 4452 4453 case TOK_DIVERTED: 4454 fill_cmd(cmd, O_DIVERTED, 0, 3); 4455 break; 4456 4457 case TOK_DIVERTEDLOOPBACK: 4458 fill_cmd(cmd, O_DIVERTED, 0, 1); 4459 break; 4460 4461 case TOK_DIVERTEDOUTPUT: 4462 fill_cmd(cmd, O_DIVERTED, 0, 2); 4463 break; 4464 4465 case TOK_FRAG: 4466 fill_cmd(cmd, O_FRAG, 0, 0); 4467 break; 4468 4469 case TOK_LAYER2: 4470 fill_cmd(cmd, O_LAYER2, 0, 0); 4471 break; 4472 4473 case TOK_XMIT: 4474 case TOK_RECV: 4475 case TOK_VIA: 4476 NEED1("recv, xmit, via require interface name" 4477 " or address"); 4478 fill_iface((ipfw_insn_if *)cmd, av[0], cblen, tstate); 4479 av++; 4480 if (F_LEN(cmd) == 0) /* not a valid address */ 4481 break; 4482 if (i == TOK_XMIT) 4483 cmd->opcode = O_XMIT; 4484 else if (i == TOK_RECV) 4485 cmd->opcode = O_RECV; 4486 else if (i == TOK_VIA) 4487 cmd->opcode = O_VIA; 4488 break; 4489 4490 case TOK_ICMPTYPES: 4491 NEED1("icmptypes requires list of types"); 4492 fill_icmptypes((ipfw_insn_u32 *)cmd, *av); 4493 av++; 4494 break; 4495 4496 case TOK_ICMP6TYPES: 4497 NEED1("icmptypes requires list of types"); 4498 fill_icmp6types((ipfw_insn_icmp6 *)cmd, *av, cblen); 4499 av++; 4500 break; 4501 4502 case TOK_IPTTL: 4503 NEED1("ipttl requires TTL"); 4504 if (strpbrk(*av, "-,")) { 4505 if (!add_ports(cmd, *av, 0, O_IPTTL, cblen)) 4506 errx(EX_DATAERR, "invalid ipttl %s", *av); 4507 } else 4508 fill_cmd(cmd, O_IPTTL, 0, strtoul(*av, NULL, 0)); 4509 av++; 4510 break; 4511 4512 case TOK_IPID: 4513 NEED1("ipid requires id"); 4514 if (strpbrk(*av, "-,")) { 4515 if (!add_ports(cmd, *av, 0, O_IPID, cblen)) 4516 errx(EX_DATAERR, "invalid ipid %s", *av); 4517 } else 4518 fill_cmd(cmd, O_IPID, 0, strtoul(*av, NULL, 0)); 4519 av++; 4520 break; 4521 4522 case TOK_IPLEN: 4523 NEED1("iplen requires length"); 4524 if (strpbrk(*av, "-,")) { 4525 if (!add_ports(cmd, *av, 0, O_IPLEN, cblen)) 4526 errx(EX_DATAERR, "invalid ip len %s", *av); 4527 } else 4528 fill_cmd(cmd, O_IPLEN, 0, strtoul(*av, NULL, 0)); 4529 av++; 4530 break; 4531 4532 case TOK_IPVER: 4533 NEED1("ipver requires version"); 4534 fill_cmd(cmd, O_IPVER, 0, strtoul(*av, NULL, 0)); 4535 av++; 4536 break; 4537 4538 case TOK_IPPRECEDENCE: 4539 NEED1("ipprecedence requires value"); 4540 fill_cmd(cmd, O_IPPRECEDENCE, 0, 4541 (strtoul(*av, NULL, 0) & 7) << 5); 4542 av++; 4543 break; 4544 4545 case TOK_DSCP: 4546 NEED1("missing DSCP code"); 4547 fill_dscp(cmd, *av, cblen); 4548 av++; 4549 break; 4550 4551 case TOK_IPOPTS: 4552 NEED1("missing argument for ipoptions"); 4553 fill_flags_cmd(cmd, O_IPOPT, f_ipopts, *av); 4554 av++; 4555 break; 4556 4557 case TOK_IPTOS: 4558 NEED1("missing argument for iptos"); 4559 fill_flags_cmd(cmd, O_IPTOS, f_iptos, *av); 4560 av++; 4561 break; 4562 4563 case TOK_UID: 4564 NEED1("uid requires argument"); 4565 { 4566 char *end; 4567 uid_t uid; 4568 struct passwd *pwd; 4569 4570 cmd->opcode = O_UID; 4571 uid = strtoul(*av, &end, 0); 4572 pwd = (*end == '\0') ? getpwuid(uid) : getpwnam(*av); 4573 if (pwd == NULL) 4574 errx(EX_DATAERR, "uid \"%s\" nonexistent", *av); 4575 cmd32->d[0] = pwd->pw_uid; 4576 cmd->len |= F_INSN_SIZE(ipfw_insn_u32); 4577 av++; 4578 } 4579 break; 4580 4581 case TOK_GID: 4582 NEED1("gid requires argument"); 4583 { 4584 char *end; 4585 gid_t gid; 4586 struct group *grp; 4587 4588 cmd->opcode = O_GID; 4589 gid = strtoul(*av, &end, 0); 4590 grp = (*end == '\0') ? getgrgid(gid) : getgrnam(*av); 4591 if (grp == NULL) 4592 errx(EX_DATAERR, "gid \"%s\" nonexistent", *av); 4593 cmd32->d[0] = grp->gr_gid; 4594 cmd->len |= F_INSN_SIZE(ipfw_insn_u32); 4595 av++; 4596 } 4597 break; 4598 4599 case TOK_JAIL: 4600 NEED1("jail requires argument"); 4601 { 4602 int jid; 4603 4604 cmd->opcode = O_JAIL; 4605 jid = jail_getid(*av); 4606 if (jid < 0) 4607 errx(EX_DATAERR, "%s", jail_errmsg); 4608 cmd32->d[0] = (uint32_t)jid; 4609 cmd->len |= F_INSN_SIZE(ipfw_insn_u32); 4610 av++; 4611 } 4612 break; 4613 4614 case TOK_ESTAB: 4615 fill_cmd(cmd, O_ESTAB, 0, 0); 4616 break; 4617 4618 case TOK_SETUP: 4619 fill_cmd(cmd, O_TCPFLAGS, 0, 4620 (TH_SYN) | ( (TH_ACK) & 0xff) <<8 ); 4621 break; 4622 4623 case TOK_TCPDATALEN: 4624 NEED1("tcpdatalen requires length"); 4625 if (strpbrk(*av, "-,")) { 4626 if (!add_ports(cmd, *av, 0, O_TCPDATALEN, cblen)) 4627 errx(EX_DATAERR, "invalid tcpdata len %s", *av); 4628 } else 4629 fill_cmd(cmd, O_TCPDATALEN, 0, 4630 strtoul(*av, NULL, 0)); 4631 av++; 4632 break; 4633 4634 case TOK_TCPOPTS: 4635 NEED1("missing argument for tcpoptions"); 4636 fill_flags_cmd(cmd, O_TCPOPTS, f_tcpopts, *av); 4637 av++; 4638 break; 4639 4640 case TOK_TCPSEQ: 4641 case TOK_TCPACK: 4642 NEED1("tcpseq/tcpack requires argument"); 4643 cmd->len = F_INSN_SIZE(ipfw_insn_u32); 4644 cmd->opcode = (i == TOK_TCPSEQ) ? O_TCPSEQ : O_TCPACK; 4645 cmd32->d[0] = htonl(strtoul(*av, NULL, 0)); 4646 av++; 4647 break; 4648 4649 case TOK_TCPWIN: 4650 NEED1("tcpwin requires length"); 4651 if (strpbrk(*av, "-,")) { 4652 if (!add_ports(cmd, *av, 0, O_TCPWIN, cblen)) 4653 errx(EX_DATAERR, "invalid tcpwin len %s", *av); 4654 } else 4655 fill_cmd(cmd, O_TCPWIN, 0, 4656 strtoul(*av, NULL, 0)); 4657 av++; 4658 break; 4659 4660 case TOK_TCPFLAGS: 4661 NEED1("missing argument for tcpflags"); 4662 cmd->opcode = O_TCPFLAGS; 4663 fill_flags_cmd(cmd, O_TCPFLAGS, f_tcpflags, *av); 4664 av++; 4665 break; 4666 4667 case TOK_KEEPSTATE: 4668 case TOK_RECORDSTATE: { 4669 uint16_t uidx; 4670 4671 if (open_par) 4672 errx(EX_USAGE, "keep-state or record-state cannot be part " 4673 "of an or block"); 4674 if (have_state) 4675 errx(EX_USAGE, "only one of keep-state, record-state, " 4676 " limit and set-limit is allowed"); 4677 if (*av != NULL && *av[0] == ':') { 4678 if (state_check_name(*av + 1) != 0) 4679 errx(EX_DATAERR, 4680 "Invalid state name %s", *av); 4681 uidx = pack_object(tstate, *av + 1, 4682 IPFW_TLV_STATE_NAME); 4683 av++; 4684 } else 4685 uidx = pack_object(tstate, default_state_name, 4686 IPFW_TLV_STATE_NAME); 4687 have_state = cmd; 4688 have_rstate = i == TOK_RECORDSTATE; 4689 fill_cmd(cmd, O_KEEP_STATE, 0, uidx); 4690 break; 4691 } 4692 4693 case TOK_LIMIT: 4694 case TOK_SETLIMIT: { 4695 ipfw_insn_limit *c = (ipfw_insn_limit *)cmd; 4696 int val; 4697 4698 if (open_par) 4699 errx(EX_USAGE, 4700 "limit or set-limit cannot be part of an or block"); 4701 if (have_state) 4702 errx(EX_USAGE, "only one of keep-state, record-state, " 4703 " limit and set-limit is allowed"); 4704 have_state = cmd; 4705 have_rstate = i == TOK_SETLIMIT; 4706 4707 cmd->len = F_INSN_SIZE(ipfw_insn_limit); 4708 CHECK_CMDLEN; 4709 cmd->opcode = O_LIMIT; 4710 c->limit_mask = c->conn_limit = 0; 4711 4712 while ( av[0] != NULL ) { 4713 if ((val = match_token(limit_masks, *av)) <= 0) 4714 break; 4715 c->limit_mask |= val; 4716 av++; 4717 } 4718 4719 if (c->limit_mask == 0) 4720 errx(EX_USAGE, "limit: missing limit mask"); 4721 4722 GET_UINT_ARG(c->conn_limit, IPFW_ARG_MIN, IPFW_ARG_MAX, 4723 TOK_LIMIT, rule_options); 4724 av++; 4725 4726 if (*av != NULL && *av[0] == ':') { 4727 if (state_check_name(*av + 1) != 0) 4728 errx(EX_DATAERR, 4729 "Invalid state name %s", *av); 4730 cmd->arg1 = pack_object(tstate, *av + 1, 4731 IPFW_TLV_STATE_NAME); 4732 av++; 4733 } else 4734 cmd->arg1 = pack_object(tstate, 4735 default_state_name, IPFW_TLV_STATE_NAME); 4736 break; 4737 } 4738 4739 case TOK_PROTO: 4740 NEED1("missing protocol"); 4741 if (add_proto(cmd, *av, &proto)) { 4742 av++; 4743 } else 4744 errx(EX_DATAERR, "invalid protocol ``%s''", 4745 *av); 4746 break; 4747 4748 case TOK_SRCIP: 4749 NEED1("missing source IP"); 4750 if (add_srcip(cmd, *av, cblen, tstate)) { 4751 av++; 4752 } 4753 break; 4754 4755 case TOK_DSTIP: 4756 NEED1("missing destination IP"); 4757 if (add_dstip(cmd, *av, cblen, tstate)) { 4758 av++; 4759 } 4760 break; 4761 4762 case TOK_SRCIP6: 4763 NEED1("missing source IP6"); 4764 if (add_srcip6(cmd, *av, cblen, tstate)) { 4765 av++; 4766 } 4767 break; 4768 4769 case TOK_DSTIP6: 4770 NEED1("missing destination IP6"); 4771 if (add_dstip6(cmd, *av, cblen, tstate)) { 4772 av++; 4773 } 4774 break; 4775 4776 case TOK_SRCPORT: 4777 NEED1("missing source port"); 4778 if (_substrcmp(*av, "any") == 0 || 4779 add_ports(cmd, *av, proto, O_IP_SRCPORT, cblen)) { 4780 av++; 4781 } else 4782 errx(EX_DATAERR, "invalid source port %s", *av); 4783 break; 4784 4785 case TOK_DSTPORT: 4786 NEED1("missing destination port"); 4787 if (_substrcmp(*av, "any") == 0 || 4788 add_ports(cmd, *av, proto, O_IP_DSTPORT, cblen)) { 4789 av++; 4790 } else 4791 errx(EX_DATAERR, "invalid destination port %s", 4792 *av); 4793 break; 4794 4795 case TOK_MAC: 4796 if (add_mac(cmd, av, cblen)) 4797 av += 2; 4798 break; 4799 4800 case TOK_MACTYPE: 4801 NEED1("missing mac type"); 4802 if (!add_mactype(cmd, *av, cblen)) 4803 errx(EX_DATAERR, "invalid mac type %s", *av); 4804 av++; 4805 break; 4806 4807 case TOK_VERREVPATH: 4808 fill_cmd(cmd, O_VERREVPATH, 0, 0); 4809 break; 4810 4811 case TOK_VERSRCREACH: 4812 fill_cmd(cmd, O_VERSRCREACH, 0, 0); 4813 break; 4814 4815 case TOK_ANTISPOOF: 4816 fill_cmd(cmd, O_ANTISPOOF, 0, 0); 4817 break; 4818 4819 case TOK_IPSEC: 4820 fill_cmd(cmd, O_IPSEC, 0, 0); 4821 break; 4822 4823 case TOK_IPV6: 4824 fill_cmd(cmd, O_IP6, 0, 0); 4825 break; 4826 4827 case TOK_IPV4: 4828 fill_cmd(cmd, O_IP4, 0, 0); 4829 break; 4830 4831 case TOK_EXT6HDR: 4832 fill_ext6hdr( cmd, *av ); 4833 av++; 4834 break; 4835 4836 case TOK_FLOWID: 4837 if (proto != IPPROTO_IPV6 ) 4838 errx( EX_USAGE, "flow-id filter is active " 4839 "only for ipv6 protocol\n"); 4840 fill_flow6( (ipfw_insn_u32 *) cmd, *av, cblen); 4841 av++; 4842 break; 4843 4844 case TOK_COMMENT: 4845 fill_comment(cmd, av, cblen); 4846 av[0]=NULL; 4847 break; 4848 4849 case TOK_TAGGED: 4850 if (av[0] && strpbrk(*av, "-,")) { 4851 if (!add_ports(cmd, *av, 0, O_TAGGED, cblen)) 4852 errx(EX_DATAERR, "tagged: invalid tag" 4853 " list: %s", *av); 4854 } 4855 else { 4856 uint16_t tag; 4857 4858 GET_UINT_ARG(tag, IPFW_ARG_MIN, IPFW_ARG_MAX, 4859 TOK_TAGGED, rule_options); 4860 fill_cmd(cmd, O_TAGGED, 0, tag); 4861 } 4862 av++; 4863 break; 4864 4865 case TOK_FIB: 4866 NEED1("fib requires fib number"); 4867 fill_cmd(cmd, O_FIB, 0, strtoul(*av, NULL, 0)); 4868 av++; 4869 break; 4870 case TOK_SOCKARG: 4871 fill_cmd(cmd, O_SOCKARG, 0, 0); 4872 break; 4873 4874 case TOK_LOOKUP: { 4875 ipfw_insn_u32 *c = (ipfw_insn_u32 *)cmd; 4876 int j; 4877 4878 if (!av[0] || !av[1]) 4879 errx(EX_USAGE, "format: lookup argument tablenum"); 4880 cmd->opcode = O_IP_DST_LOOKUP; 4881 cmd->len |= F_INSN_SIZE(ipfw_insn) + 2; 4882 i = match_token(rule_options, *av); 4883 for (j = 0; lookup_key[j] >= 0 ; j++) { 4884 if (i == lookup_key[j]) 4885 break; 4886 } 4887 if (lookup_key[j] <= 0) 4888 errx(EX_USAGE, "format: cannot lookup on %s", *av); 4889 __PAST_END(c->d, 1) = j; // i converted to option 4890 av++; 4891 4892 if ((j = pack_table(tstate, *av)) == 0) 4893 errx(EX_DATAERR, "Invalid table name: %s", *av); 4894 4895 cmd->arg1 = j; 4896 av++; 4897 } 4898 break; 4899 case TOK_FLOW: 4900 NEED1("missing table name"); 4901 if (strncmp(*av, "table(", 6) != 0) 4902 errx(EX_DATAERR, 4903 "enclose table name into \"table()\""); 4904 fill_table(cmd, *av, O_IP_FLOW_LOOKUP, tstate); 4905 av++; 4906 break; 4907 4908 case TOK_SKIPACTION: 4909 if (have_skipcmd) 4910 errx(EX_USAGE, "only one defer-action " 4911 "is allowed"); 4912 have_skipcmd = cmd; 4913 fill_cmd(cmd, O_SKIP_ACTION, 0, 0); 4914 break; 4915 4916 default: 4917 errx(EX_USAGE, "unrecognised option [%d] %s\n", i, s); 4918 } 4919 if (F_LEN(cmd) > 0) { /* prepare to advance */ 4920 prev = cmd; 4921 cmd = next_cmd(cmd, &cblen); 4922 } 4923 } 4924 4925 done: 4926 4927 if (!have_state && have_skipcmd) 4928 warnx("Rule contains \"defer-immediate-action\" " 4929 "and doesn't contain any state-related options."); 4930 4931 /* 4932 * Now copy stuff into the rule. 4933 * If we have a keep-state option, the first instruction 4934 * must be a PROBE_STATE (which is generated here). 4935 * If we have a LOG option, it was stored as the first command, 4936 * and now must be moved to the top of the action part. 4937 */ 4938 dst = (ipfw_insn *)rule->cmd; 4939 4940 /* 4941 * First thing to write into the command stream is the match probability. 4942 */ 4943 if (match_prob != 1) { /* 1 means always match */ 4944 dst->opcode = O_PROB; 4945 dst->len = 2; 4946 *((int32_t *)(dst+1)) = (int32_t)(match_prob * 0x7fffffff); 4947 dst += dst->len; 4948 } 4949 4950 /* 4951 * generate O_PROBE_STATE if necessary 4952 */ 4953 if (have_state && have_state->opcode != O_CHECK_STATE && !have_rstate) { 4954 fill_cmd(dst, O_PROBE_STATE, 0, have_state->arg1); 4955 dst = next_cmd(dst, &rblen); 4956 } 4957 4958 /* 4959 * copy all commands but O_LOG, O_KEEP_STATE, O_LIMIT, O_ALTQ, O_TAG, 4960 * O_SKIP_ACTION 4961 */ 4962 for (src = (ipfw_insn *)cmdbuf; src != cmd; src += i) { 4963 i = F_LEN(src); 4964 CHECK_RBUFLEN(i); 4965 4966 switch (src->opcode) { 4967 case O_LOG: 4968 case O_KEEP_STATE: 4969 case O_LIMIT: 4970 case O_ALTQ: 4971 case O_TAG: 4972 case O_SKIP_ACTION: 4973 break; 4974 default: 4975 bcopy(src, dst, i * sizeof(uint32_t)); 4976 dst += i; 4977 } 4978 } 4979 4980 /* 4981 * put back the have_state command as last opcode 4982 */ 4983 if (have_state && have_state->opcode != O_CHECK_STATE) { 4984 i = F_LEN(have_state); 4985 CHECK_RBUFLEN(i); 4986 bcopy(have_state, dst, i * sizeof(uint32_t)); 4987 dst += i; 4988 } 4989 4990 /* 4991 * put back the have_skipcmd command as very last opcode 4992 */ 4993 if (have_skipcmd) { 4994 i = F_LEN(have_skipcmd); 4995 CHECK_RBUFLEN(i); 4996 bcopy(have_skipcmd, dst, i * sizeof(uint32_t)); 4997 dst += i; 4998 } 4999 5000 /* 5001 * start action section 5002 */ 5003 rule->act_ofs = dst - rule->cmd; 5004 5005 /* put back O_LOG, O_ALTQ, O_TAG if necessary */ 5006 if (have_log) { 5007 i = F_LEN(have_log); 5008 CHECK_RBUFLEN(i); 5009 bcopy(have_log, dst, i * sizeof(uint32_t)); 5010 dst += i; 5011 } 5012 if (have_altq) { 5013 i = F_LEN(have_altq); 5014 CHECK_RBUFLEN(i); 5015 bcopy(have_altq, dst, i * sizeof(uint32_t)); 5016 dst += i; 5017 } 5018 if (have_tag) { 5019 i = F_LEN(have_tag); 5020 CHECK_RBUFLEN(i); 5021 bcopy(have_tag, dst, i * sizeof(uint32_t)); 5022 dst += i; 5023 } 5024 5025 /* 5026 * copy all other actions 5027 */ 5028 for (src = (ipfw_insn *)actbuf; src != action; src += i) { 5029 i = F_LEN(src); 5030 CHECK_RBUFLEN(i); 5031 bcopy(src, dst, i * sizeof(uint32_t)); 5032 dst += i; 5033 } 5034 5035 rule->cmd_len = (uint32_t *)dst - (uint32_t *)(rule->cmd); 5036 *rbufsize = (char *)dst - (char *)rule; 5037 } 5038 5039 static int 5040 compare_ntlv(const void *_a, const void *_b) 5041 { 5042 ipfw_obj_ntlv *a, *b; 5043 5044 a = (ipfw_obj_ntlv *)_a; 5045 b = (ipfw_obj_ntlv *)_b; 5046 5047 if (a->set < b->set) 5048 return (-1); 5049 else if (a->set > b->set) 5050 return (1); 5051 5052 if (a->idx < b->idx) 5053 return (-1); 5054 else if (a->idx > b->idx) 5055 return (1); 5056 5057 if (a->head.type < b->head.type) 5058 return (-1); 5059 else if (a->head.type > b->head.type) 5060 return (1); 5061 5062 return (0); 5063 } 5064 5065 /* 5066 * Provide kernel with sorted list of referenced objects 5067 */ 5068 static void 5069 object_sort_ctlv(ipfw_obj_ctlv *ctlv) 5070 { 5071 5072 qsort(ctlv + 1, ctlv->count, ctlv->objsize, compare_ntlv); 5073 } 5074 5075 struct object_kt { 5076 uint16_t uidx; 5077 uint16_t type; 5078 }; 5079 static int 5080 compare_object_kntlv(const void *k, const void *v) 5081 { 5082 ipfw_obj_ntlv *ntlv; 5083 struct object_kt key; 5084 5085 key = *((struct object_kt *)k); 5086 ntlv = (ipfw_obj_ntlv *)v; 5087 5088 if (key.uidx < ntlv->idx) 5089 return (-1); 5090 else if (key.uidx > ntlv->idx) 5091 return (1); 5092 5093 if (key.type < ntlv->head.type) 5094 return (-1); 5095 else if (key.type > ntlv->head.type) 5096 return (1); 5097 5098 return (0); 5099 } 5100 5101 /* 5102 * Finds object name in @ctlv by @idx and @type. 5103 * Uses the following facts: 5104 * 1) All TLVs are the same size 5105 * 2) Kernel implementation provides already sorted list. 5106 * 5107 * Returns table name or NULL. 5108 */ 5109 static char * 5110 object_search_ctlv(ipfw_obj_ctlv *ctlv, uint16_t idx, uint16_t type) 5111 { 5112 ipfw_obj_ntlv *ntlv; 5113 struct object_kt key; 5114 5115 key.uidx = idx; 5116 key.type = type; 5117 5118 ntlv = bsearch(&key, (ctlv + 1), ctlv->count, ctlv->objsize, 5119 compare_object_kntlv); 5120 5121 if (ntlv != NULL) 5122 return (ntlv->name); 5123 5124 return (NULL); 5125 } 5126 5127 static char * 5128 table_search_ctlv(ipfw_obj_ctlv *ctlv, uint16_t idx) 5129 { 5130 5131 return (object_search_ctlv(ctlv, idx, IPFW_TLV_TBL_NAME)); 5132 } 5133 5134 /* 5135 * Adds one or more rules to ipfw chain. 5136 * Data layout: 5137 * Request: 5138 * [ 5139 * ip_fw3_opheader 5140 * [ ipfw_obj_ctlv(IPFW_TLV_TBL_LIST) ipfw_obj_ntlv x N ] (optional *1) 5141 * [ ipfw_obj_ctlv(IPFW_TLV_RULE_LIST) [ ip_fw_rule ip_fw_insn ] x N ] (*2) (*3) 5142 * ] 5143 * Reply: 5144 * [ 5145 * ip_fw3_opheader 5146 * [ ipfw_obj_ctlv(IPFW_TLV_TBL_LIST) ipfw_obj_ntlv x N ] (optional) 5147 * [ ipfw_obj_ctlv(IPFW_TLV_RULE_LIST) [ ip_fw_rule ip_fw_insn ] x N ] 5148 * ] 5149 * 5150 * Rules in reply are modified to store their actual ruleset number. 5151 * 5152 * (*1) TLVs inside IPFW_TLV_TBL_LIST needs to be sorted ascending 5153 * according to their idx field and there has to be no duplicates. 5154 * (*2) Numbered rules inside IPFW_TLV_RULE_LIST needs to be sorted ascending. 5155 * (*3) Each ip_fw structure needs to be aligned to u64 boundary. 5156 */ 5157 void 5158 ipfw_add(char *av[]) 5159 { 5160 uint32_t rulebuf[1024]; 5161 int rbufsize, default_off, tlen, rlen; 5162 size_t sz; 5163 struct tidx ts; 5164 struct ip_fw_rule *rule; 5165 caddr_t tbuf; 5166 ip_fw3_opheader *op3; 5167 ipfw_obj_ctlv *ctlv, *tstate; 5168 5169 rbufsize = sizeof(rulebuf); 5170 memset(rulebuf, 0, rbufsize); 5171 memset(&ts, 0, sizeof(ts)); 5172 5173 /* Optimize case with no tables */ 5174 default_off = sizeof(ipfw_obj_ctlv) + sizeof(ip_fw3_opheader); 5175 op3 = (ip_fw3_opheader *)rulebuf; 5176 ctlv = (ipfw_obj_ctlv *)(op3 + 1); 5177 rule = (struct ip_fw_rule *)(ctlv + 1); 5178 rbufsize -= default_off; 5179 5180 compile_rule(av, (uint32_t *)rule, &rbufsize, &ts); 5181 /* Align rule size to u64 boundary */ 5182 rlen = roundup2(rbufsize, sizeof(uint64_t)); 5183 5184 tbuf = NULL; 5185 sz = 0; 5186 tstate = NULL; 5187 if (ts.count != 0) { 5188 /* Some tables. We have to alloc more data */ 5189 tlen = ts.count * sizeof(ipfw_obj_ntlv); 5190 sz = default_off + sizeof(ipfw_obj_ctlv) + tlen + rlen; 5191 5192 if ((tbuf = calloc(1, sz)) == NULL) 5193 err(EX_UNAVAILABLE, "malloc() failed for IP_FW_ADD"); 5194 op3 = (ip_fw3_opheader *)tbuf; 5195 /* Tables first */ 5196 ctlv = (ipfw_obj_ctlv *)(op3 + 1); 5197 ctlv->head.type = IPFW_TLV_TBLNAME_LIST; 5198 ctlv->head.length = sizeof(ipfw_obj_ctlv) + tlen; 5199 ctlv->count = ts.count; 5200 ctlv->objsize = sizeof(ipfw_obj_ntlv); 5201 memcpy(ctlv + 1, ts.idx, tlen); 5202 object_sort_ctlv(ctlv); 5203 tstate = ctlv; 5204 /* Rule next */ 5205 ctlv = (ipfw_obj_ctlv *)((caddr_t)ctlv + ctlv->head.length); 5206 ctlv->head.type = IPFW_TLV_RULE_LIST; 5207 ctlv->head.length = sizeof(ipfw_obj_ctlv) + rlen; 5208 ctlv->count = 1; 5209 memcpy(ctlv + 1, rule, rbufsize); 5210 } else { 5211 /* Simply add header */ 5212 sz = rlen + default_off; 5213 memset(ctlv, 0, sizeof(*ctlv)); 5214 ctlv->head.type = IPFW_TLV_RULE_LIST; 5215 ctlv->head.length = sizeof(ipfw_obj_ctlv) + rlen; 5216 ctlv->count = 1; 5217 } 5218 5219 if (do_get3(IP_FW_XADD, op3, &sz) != 0) 5220 err(EX_UNAVAILABLE, "getsockopt(%s)", "IP_FW_XADD"); 5221 5222 if (!co.do_quiet) { 5223 struct format_opts sfo; 5224 struct buf_pr bp; 5225 memset(&sfo, 0, sizeof(sfo)); 5226 sfo.tstate = tstate; 5227 sfo.set_mask = (uint32_t)(-1); 5228 bp_alloc(&bp, 4096); 5229 show_static_rule(&co, &sfo, &bp, rule, NULL); 5230 printf("%s", bp.buf); 5231 bp_free(&bp); 5232 } 5233 5234 if (tbuf != NULL) 5235 free(tbuf); 5236 5237 if (ts.idx != NULL) 5238 free(ts.idx); 5239 } 5240 5241 /* 5242 * clear the counters or the log counters. 5243 * optname has the following values: 5244 * 0 (zero both counters and logging) 5245 * 1 (zero logging only) 5246 */ 5247 void 5248 ipfw_zero(int ac, char *av[], int optname) 5249 { 5250 ipfw_range_tlv rt; 5251 char const *errstr; 5252 char const *name = optname ? "RESETLOG" : "ZERO"; 5253 uint32_t arg; 5254 int failed = EX_OK; 5255 5256 optname = optname ? IP_FW_XRESETLOG : IP_FW_XZERO; 5257 av++; ac--; 5258 5259 if (ac == 0) { 5260 /* clear all entries */ 5261 memset(&rt, 0, sizeof(rt)); 5262 rt.flags = IPFW_RCFLAG_ALL; 5263 if (do_range_cmd(optname, &rt) < 0) 5264 err(EX_UNAVAILABLE, "setsockopt(IP_FW_X%s)", name); 5265 if (!co.do_quiet) 5266 printf("%s.\n", optname == IP_FW_XZERO ? 5267 "Accounting cleared":"Logging counts reset"); 5268 5269 return; 5270 } 5271 5272 while (ac) { 5273 /* Rule number */ 5274 if (isdigit(**av)) { 5275 arg = strtonum(*av, 0, 0xffff, &errstr); 5276 if (errstr) 5277 errx(EX_DATAERR, 5278 "invalid rule number %s\n", *av); 5279 memset(&rt, 0, sizeof(rt)); 5280 rt.start_rule = arg; 5281 rt.end_rule = arg; 5282 rt.flags |= IPFW_RCFLAG_RANGE; 5283 if (co.use_set != 0) { 5284 rt.set = co.use_set - 1; 5285 rt.flags |= IPFW_RCFLAG_SET; 5286 } 5287 if (do_range_cmd(optname, &rt) != 0) { 5288 warn("rule %u: setsockopt(IP_FW_X%s)", 5289 arg, name); 5290 failed = EX_UNAVAILABLE; 5291 } else if (rt.new_set == 0) { 5292 printf("Entry %d not found\n", arg); 5293 failed = EX_UNAVAILABLE; 5294 } else if (!co.do_quiet) 5295 printf("Entry %d %s.\n", arg, 5296 optname == IP_FW_XZERO ? 5297 "cleared" : "logging count reset"); 5298 } else { 5299 errx(EX_USAGE, "invalid rule number ``%s''", *av); 5300 } 5301 av++; ac--; 5302 } 5303 if (failed != EX_OK) 5304 exit(failed); 5305 } 5306 5307 void 5308 ipfw_flush(int force) 5309 { 5310 ipfw_range_tlv rt; 5311 5312 if (!force && !co.do_quiet) { /* need to ask user */ 5313 int c; 5314 5315 printf("Are you sure? [yn] "); 5316 fflush(stdout); 5317 do { 5318 c = toupper(getc(stdin)); 5319 while (c != '\n' && getc(stdin) != '\n') 5320 if (feof(stdin)) 5321 return; /* and do not flush */ 5322 } while (c != 'Y' && c != 'N'); 5323 printf("\n"); 5324 if (c == 'N') /* user said no */ 5325 return; 5326 } 5327 if (co.do_pipe) { 5328 dummynet_flush(); 5329 return; 5330 } 5331 /* `ipfw set N flush` - is the same that `ipfw delete set N` */ 5332 memset(&rt, 0, sizeof(rt)); 5333 if (co.use_set != 0) { 5334 rt.set = co.use_set - 1; 5335 rt.flags = IPFW_RCFLAG_SET; 5336 } else 5337 rt.flags = IPFW_RCFLAG_ALL; 5338 if (do_range_cmd(IP_FW_XDEL, &rt) != 0) 5339 err(EX_UNAVAILABLE, "setsockopt(IP_FW_XDEL)"); 5340 if (!co.do_quiet) 5341 printf("Flushed all %s.\n", co.do_pipe ? "pipes" : "rules"); 5342 } 5343 5344 static struct _s_x intcmds[] = { 5345 { "talist", TOK_TALIST }, 5346 { "iflist", TOK_IFLIST }, 5347 { "olist", TOK_OLIST }, 5348 { "vlist", TOK_VLIST }, 5349 { NULL, 0 } 5350 }; 5351 5352 static struct _s_x otypes[] = { 5353 { "EACTION", IPFW_TLV_EACTION }, 5354 { "DYNSTATE", IPFW_TLV_STATE_NAME }, 5355 { NULL, 0 } 5356 }; 5357 5358 static const char* 5359 lookup_eaction_name(ipfw_obj_ntlv *ntlv, int cnt, uint16_t type) 5360 { 5361 const char *name; 5362 int i; 5363 5364 name = NULL; 5365 for (i = 0; i < cnt; i++) { 5366 if (ntlv[i].head.type != IPFW_TLV_EACTION) 5367 continue; 5368 if (IPFW_TLV_EACTION_NAME(ntlv[i].idx) != type) 5369 continue; 5370 name = ntlv[i].name; 5371 break; 5372 } 5373 return (name); 5374 } 5375 5376 static void 5377 ipfw_list_objects(int ac, char *av[]) 5378 { 5379 ipfw_obj_lheader req, *olh; 5380 ipfw_obj_ntlv *ntlv; 5381 const char *name; 5382 size_t sz; 5383 int i; 5384 5385 memset(&req, 0, sizeof(req)); 5386 sz = sizeof(req); 5387 if (do_get3(IP_FW_DUMP_SRVOBJECTS, &req.opheader, &sz) != 0) 5388 if (errno != ENOMEM) 5389 return; 5390 5391 sz = req.size; 5392 if ((olh = calloc(1, sz)) == NULL) 5393 return; 5394 5395 olh->size = sz; 5396 if (do_get3(IP_FW_DUMP_SRVOBJECTS, &olh->opheader, &sz) != 0) { 5397 free(olh); 5398 return; 5399 } 5400 5401 if (olh->count > 0) 5402 printf("Objects list:\n"); 5403 else 5404 printf("There are no objects\n"); 5405 ntlv = (ipfw_obj_ntlv *)(olh + 1); 5406 for (i = 0; i < olh->count; i++) { 5407 name = match_value(otypes, ntlv->head.type); 5408 if (name == NULL) 5409 name = lookup_eaction_name( 5410 (ipfw_obj_ntlv *)(olh + 1), olh->count, 5411 ntlv->head.type); 5412 if (name == NULL) 5413 printf(" kidx: %4d\ttype: %10d\tname: %s\n", 5414 ntlv->idx, ntlv->head.type, ntlv->name); 5415 else 5416 printf(" kidx: %4d\ttype: %10s\tname: %s\n", 5417 ntlv->idx, name, ntlv->name); 5418 ntlv++; 5419 } 5420 free(olh); 5421 } 5422 5423 void 5424 ipfw_internal_handler(int ac, char *av[]) 5425 { 5426 int tcmd; 5427 5428 ac--; av++; 5429 NEED1("internal cmd required"); 5430 5431 if ((tcmd = match_token(intcmds, *av)) == -1) 5432 errx(EX_USAGE, "invalid internal sub-cmd: %s", *av); 5433 5434 switch (tcmd) { 5435 case TOK_IFLIST: 5436 ipfw_list_tifaces(); 5437 break; 5438 case TOK_TALIST: 5439 ipfw_list_ta(ac, av); 5440 break; 5441 case TOK_OLIST: 5442 ipfw_list_objects(ac, av); 5443 break; 5444 case TOK_VLIST: 5445 ipfw_list_values(ac, av); 5446 break; 5447 } 5448 } 5449 5450 static int 5451 ipfw_get_tracked_ifaces(ipfw_obj_lheader **polh) 5452 { 5453 ipfw_obj_lheader req, *olh; 5454 size_t sz; 5455 5456 memset(&req, 0, sizeof(req)); 5457 sz = sizeof(req); 5458 5459 if (do_get3(IP_FW_XIFLIST, &req.opheader, &sz) != 0) { 5460 if (errno != ENOMEM) 5461 return (errno); 5462 } 5463 5464 sz = req.size; 5465 if ((olh = calloc(1, sz)) == NULL) 5466 return (ENOMEM); 5467 5468 olh->size = sz; 5469 if (do_get3(IP_FW_XIFLIST, &olh->opheader, &sz) != 0) { 5470 free(olh); 5471 return (errno); 5472 } 5473 5474 *polh = olh; 5475 return (0); 5476 } 5477 5478 static int 5479 ifinfo_cmp(const void *a, const void *b) 5480 { 5481 ipfw_iface_info *ia, *ib; 5482 5483 ia = (ipfw_iface_info *)a; 5484 ib = (ipfw_iface_info *)b; 5485 5486 return (stringnum_cmp(ia->ifname, ib->ifname)); 5487 } 5488 5489 /* 5490 * Retrieves table list from kernel, 5491 * optionally sorts it and calls requested function for each table. 5492 * Returns 0 on success. 5493 */ 5494 static void 5495 ipfw_list_tifaces() 5496 { 5497 ipfw_obj_lheader *olh; 5498 ipfw_iface_info *info; 5499 int i, error; 5500 5501 if ((error = ipfw_get_tracked_ifaces(&olh)) != 0) 5502 err(EX_OSERR, "Unable to request ipfw tracked interface list"); 5503 5504 5505 qsort(olh + 1, olh->count, olh->objsize, ifinfo_cmp); 5506 5507 info = (ipfw_iface_info *)(olh + 1); 5508 for (i = 0; i < olh->count; i++) { 5509 if (info->flags & IPFW_IFFLAG_RESOLVED) 5510 printf("%s ifindex: %d refcount: %u changes: %u\n", 5511 info->ifname, info->ifindex, info->refcnt, 5512 info->gencnt); 5513 else 5514 printf("%s ifindex: unresolved refcount: %u changes: %u\n", 5515 info->ifname, info->refcnt, info->gencnt); 5516 info = (ipfw_iface_info *)((caddr_t)info + olh->objsize); 5517 } 5518 5519 free(olh); 5520 } 5521 5522 5523 5524 5525