1 /*- 2 * Copyright (c) 2002-2003 Luigi Rizzo 3 * Copyright (c) 1996 Alex Nash, Paul Traina, Poul-Henning Kamp 4 * Copyright (c) 1994 Ugen J.S.Antsilevich 5 * 6 * Idea and grammar partially left from: 7 * Copyright (c) 1993 Daniel Boulet 8 * 9 * Redistribution and use in source forms, with and without modification, 10 * are permitted provided that this entire comment appears intact. 11 * 12 * Redistribution in binary form may occur without any restrictions. 13 * Obviously, it would be nice if you gave credit where credit is due 14 * but requiring it would be too onerous. 15 * 16 * This software is provided ``AS IS'' without any warranties of any kind. 17 * 18 * NEW command line interface for IP firewall facility 19 * 20 * $FreeBSD$ 21 */ 22 23 #include <sys/types.h> 24 #include <sys/param.h> 25 #include <sys/socket.h> 26 #include <sys/sockio.h> 27 #include <sys/sysctl.h> 28 29 #include "ipfw2.h" 30 31 #include <ctype.h> 32 #include <err.h> 33 #include <errno.h> 34 #include <grp.h> 35 #include <jail.h> 36 #include <netdb.h> 37 #include <pwd.h> 38 #include <stdio.h> 39 #include <stdarg.h> 40 #include <stdint.h> 41 #include <stdlib.h> 42 #include <string.h> 43 #include <sysexits.h> 44 #include <time.h> /* ctime */ 45 #include <timeconv.h> /* _long_to_time */ 46 #include <unistd.h> 47 #include <fcntl.h> 48 #include <stddef.h> /* offsetof */ 49 50 #include <net/ethernet.h> 51 #include <net/if.h> /* only IFNAMSIZ */ 52 #include <netinet/in.h> 53 #include <netinet/in_systm.h> /* only n_short, n_long */ 54 #include <netinet/ip.h> 55 #include <netinet/ip_icmp.h> 56 #include <netinet/ip_fw.h> 57 #include <netinet/tcp.h> 58 #include <arpa/inet.h> 59 60 struct cmdline_opts co; /* global options */ 61 62 struct format_opts { 63 int bcwidth; 64 int pcwidth; 65 int show_counters; 66 int show_time; /* show timestamp */ 67 uint32_t set_mask; /* enabled sets mask */ 68 uint32_t flags; /* request flags */ 69 uint32_t first; /* first rule to request */ 70 uint32_t last; /* last rule to request */ 71 uint32_t dcnt; /* number of dynamic states */ 72 ipfw_obj_ctlv *tstate; /* table state data */ 73 }; 74 75 int resvd_set_number = RESVD_SET; 76 77 int ipfw_socket = -1; 78 79 #define CHECK_LENGTH(v, len) do { \ 80 if ((v) < (len)) \ 81 errx(EX_DATAERR, "Rule too long"); \ 82 } while (0) 83 /* 84 * Check if we have enough space in cmd buffer. Note that since 85 * first 8? u32 words are reserved by reserved header, full cmd 86 * buffer can't be used, so we need to protect from buffer overrun 87 * only. At the beginning, cblen is less than actual buffer size by 88 * size of ipfw_insn_u32 instruction + 1 u32 work. This eliminates need 89 * for checking small instructions fitting in given range. 90 * We also (ab)use the fact that ipfw_insn is always the first field 91 * for any custom instruction. 92 */ 93 #define CHECK_CMDLEN CHECK_LENGTH(cblen, F_LEN((ipfw_insn *)cmd)) 94 95 #define GET_UINT_ARG(arg, min, max, tok, s_x) do { \ 96 if (!av[0]) \ 97 errx(EX_USAGE, "%s: missing argument", match_value(s_x, tok)); \ 98 if (_substrcmp(*av, "tablearg") == 0) { \ 99 arg = IP_FW_TARG; \ 100 break; \ 101 } \ 102 \ 103 { \ 104 long _xval; \ 105 char *end; \ 106 \ 107 _xval = strtol(*av, &end, 10); \ 108 \ 109 if (!isdigit(**av) || *end != '\0' || (_xval == 0 && errno == EINVAL)) \ 110 errx(EX_DATAERR, "%s: invalid argument: %s", \ 111 match_value(s_x, tok), *av); \ 112 \ 113 if (errno == ERANGE || _xval < min || _xval > max) \ 114 errx(EX_DATAERR, "%s: argument is out of range (%u..%u): %s", \ 115 match_value(s_x, tok), min, max, *av); \ 116 \ 117 if (_xval == IP_FW_TARG) \ 118 errx(EX_DATAERR, "%s: illegal argument value: %s", \ 119 match_value(s_x, tok), *av); \ 120 arg = _xval; \ 121 } \ 122 } while (0) 123 124 static struct _s_x f_tcpflags[] = { 125 { "syn", TH_SYN }, 126 { "fin", TH_FIN }, 127 { "ack", TH_ACK }, 128 { "psh", TH_PUSH }, 129 { "rst", TH_RST }, 130 { "urg", TH_URG }, 131 { "tcp flag", 0 }, 132 { NULL, 0 } 133 }; 134 135 static struct _s_x f_tcpopts[] = { 136 { "mss", IP_FW_TCPOPT_MSS }, 137 { "maxseg", IP_FW_TCPOPT_MSS }, 138 { "window", IP_FW_TCPOPT_WINDOW }, 139 { "sack", IP_FW_TCPOPT_SACK }, 140 { "ts", IP_FW_TCPOPT_TS }, 141 { "timestamp", IP_FW_TCPOPT_TS }, 142 { "cc", IP_FW_TCPOPT_CC }, 143 { "tcp option", 0 }, 144 { NULL, 0 } 145 }; 146 147 /* 148 * IP options span the range 0 to 255 so we need to remap them 149 * (though in fact only the low 5 bits are significant). 150 */ 151 static struct _s_x f_ipopts[] = { 152 { "ssrr", IP_FW_IPOPT_SSRR}, 153 { "lsrr", IP_FW_IPOPT_LSRR}, 154 { "rr", IP_FW_IPOPT_RR}, 155 { "ts", IP_FW_IPOPT_TS}, 156 { "ip option", 0 }, 157 { NULL, 0 } 158 }; 159 160 static struct _s_x f_iptos[] = { 161 { "lowdelay", IPTOS_LOWDELAY}, 162 { "throughput", IPTOS_THROUGHPUT}, 163 { "reliability", IPTOS_RELIABILITY}, 164 { "mincost", IPTOS_MINCOST}, 165 { "congestion", IPTOS_ECN_CE}, 166 { "ecntransport", IPTOS_ECN_ECT0}, 167 { "ip tos option", 0}, 168 { NULL, 0 } 169 }; 170 171 struct _s_x f_ipdscp[] = { 172 { "af11", IPTOS_DSCP_AF11 >> 2 }, /* 001010 */ 173 { "af12", IPTOS_DSCP_AF12 >> 2 }, /* 001100 */ 174 { "af13", IPTOS_DSCP_AF13 >> 2 }, /* 001110 */ 175 { "af21", IPTOS_DSCP_AF21 >> 2 }, /* 010010 */ 176 { "af22", IPTOS_DSCP_AF22 >> 2 }, /* 010100 */ 177 { "af23", IPTOS_DSCP_AF23 >> 2 }, /* 010110 */ 178 { "af31", IPTOS_DSCP_AF31 >> 2 }, /* 011010 */ 179 { "af32", IPTOS_DSCP_AF32 >> 2 }, /* 011100 */ 180 { "af33", IPTOS_DSCP_AF33 >> 2 }, /* 011110 */ 181 { "af41", IPTOS_DSCP_AF41 >> 2 }, /* 100010 */ 182 { "af42", IPTOS_DSCP_AF42 >> 2 }, /* 100100 */ 183 { "af43", IPTOS_DSCP_AF43 >> 2 }, /* 100110 */ 184 { "be", IPTOS_DSCP_CS0 >> 2 }, /* 000000 */ 185 { "ef", IPTOS_DSCP_EF >> 2 }, /* 101110 */ 186 { "cs0", IPTOS_DSCP_CS0 >> 2 }, /* 000000 */ 187 { "cs1", IPTOS_DSCP_CS1 >> 2 }, /* 001000 */ 188 { "cs2", IPTOS_DSCP_CS2 >> 2 }, /* 010000 */ 189 { "cs3", IPTOS_DSCP_CS3 >> 2 }, /* 011000 */ 190 { "cs4", IPTOS_DSCP_CS4 >> 2 }, /* 100000 */ 191 { "cs5", IPTOS_DSCP_CS5 >> 2 }, /* 101000 */ 192 { "cs6", IPTOS_DSCP_CS6 >> 2 }, /* 110000 */ 193 { "cs7", IPTOS_DSCP_CS7 >> 2 }, /* 100000 */ 194 { NULL, 0 } 195 }; 196 197 static struct _s_x limit_masks[] = { 198 {"all", DYN_SRC_ADDR|DYN_SRC_PORT|DYN_DST_ADDR|DYN_DST_PORT}, 199 {"src-addr", DYN_SRC_ADDR}, 200 {"src-port", DYN_SRC_PORT}, 201 {"dst-addr", DYN_DST_ADDR}, 202 {"dst-port", DYN_DST_PORT}, 203 {NULL, 0} 204 }; 205 206 /* 207 * we use IPPROTO_ETHERTYPE as a fake protocol id to call the print routines 208 * This is only used in this code. 209 */ 210 #define IPPROTO_ETHERTYPE 0x1000 211 static struct _s_x ether_types[] = { 212 /* 213 * Note, we cannot use "-:&/" in the names because they are field 214 * separators in the type specifications. Also, we use s = NULL as 215 * end-delimiter, because a type of 0 can be legal. 216 */ 217 { "ip", 0x0800 }, 218 { "ipv4", 0x0800 }, 219 { "ipv6", 0x86dd }, 220 { "arp", 0x0806 }, 221 { "rarp", 0x8035 }, 222 { "vlan", 0x8100 }, 223 { "loop", 0x9000 }, 224 { "trail", 0x1000 }, 225 { "at", 0x809b }, 226 { "atalk", 0x809b }, 227 { "aarp", 0x80f3 }, 228 { "pppoe_disc", 0x8863 }, 229 { "pppoe_sess", 0x8864 }, 230 { "ipx_8022", 0x00E0 }, 231 { "ipx_8023", 0x0000 }, 232 { "ipx_ii", 0x8137 }, 233 { "ipx_snap", 0x8137 }, 234 { "ipx", 0x8137 }, 235 { "ns", 0x0600 }, 236 { NULL, 0 } 237 }; 238 239 static struct _s_x rule_eactions[] = { 240 { "nat64lsn", TOK_NAT64LSN }, 241 { "nat64stl", TOK_NAT64STL }, 242 { "nptv6", TOK_NPTV6 }, 243 { "tcp-setmss", TOK_TCPSETMSS }, 244 { NULL, 0 } /* terminator */ 245 }; 246 247 static struct _s_x rule_actions[] = { 248 { "abort6", TOK_ABORT6 }, 249 { "abort", TOK_ABORT }, 250 { "accept", TOK_ACCEPT }, 251 { "pass", TOK_ACCEPT }, 252 { "allow", TOK_ACCEPT }, 253 { "permit", TOK_ACCEPT }, 254 { "count", TOK_COUNT }, 255 { "pipe", TOK_PIPE }, 256 { "queue", TOK_QUEUE }, 257 { "divert", TOK_DIVERT }, 258 { "tee", TOK_TEE }, 259 { "netgraph", TOK_NETGRAPH }, 260 { "ngtee", TOK_NGTEE }, 261 { "fwd", TOK_FORWARD }, 262 { "forward", TOK_FORWARD }, 263 { "skipto", TOK_SKIPTO }, 264 { "deny", TOK_DENY }, 265 { "drop", TOK_DENY }, 266 { "reject", TOK_REJECT }, 267 { "reset6", TOK_RESET6 }, 268 { "reset", TOK_RESET }, 269 { "unreach6", TOK_UNREACH6 }, 270 { "unreach", TOK_UNREACH }, 271 { "check-state", TOK_CHECKSTATE }, 272 { "//", TOK_COMMENT }, 273 { "nat", TOK_NAT }, 274 { "reass", TOK_REASS }, 275 { "setfib", TOK_SETFIB }, 276 { "setdscp", TOK_SETDSCP }, 277 { "call", TOK_CALL }, 278 { "return", TOK_RETURN }, 279 { "eaction", TOK_EACTION }, 280 { "tcp-setmss", TOK_TCPSETMSS }, 281 { NULL, 0 } /* terminator */ 282 }; 283 284 static struct _s_x rule_action_params[] = { 285 { "altq", TOK_ALTQ }, 286 { "log", TOK_LOG }, 287 { "tag", TOK_TAG }, 288 { "untag", TOK_UNTAG }, 289 { NULL, 0 } /* terminator */ 290 }; 291 292 /* 293 * The 'lookup' instruction accepts one of the following arguments. 294 * -1 is a terminator for the list. 295 * Arguments are passed as v[1] in O_DST_LOOKUP options. 296 */ 297 static int lookup_key[] = { 298 TOK_DSTIP, TOK_SRCIP, TOK_DSTPORT, TOK_SRCPORT, 299 TOK_UID, TOK_JAIL, TOK_DSCP, -1 }; 300 301 static struct _s_x rule_options[] = { 302 { "tagged", TOK_TAGGED }, 303 { "uid", TOK_UID }, 304 { "gid", TOK_GID }, 305 { "jail", TOK_JAIL }, 306 { "in", TOK_IN }, 307 { "limit", TOK_LIMIT }, 308 { "set-limit", TOK_SETLIMIT }, 309 { "keep-state", TOK_KEEPSTATE }, 310 { "record-state", TOK_RECORDSTATE }, 311 { "bridged", TOK_LAYER2 }, 312 { "layer2", TOK_LAYER2 }, 313 { "out", TOK_OUT }, 314 { "diverted", TOK_DIVERTED }, 315 { "diverted-loopback", TOK_DIVERTEDLOOPBACK }, 316 { "diverted-output", TOK_DIVERTEDOUTPUT }, 317 { "xmit", TOK_XMIT }, 318 { "recv", TOK_RECV }, 319 { "via", TOK_VIA }, 320 { "fragment", TOK_FRAG }, 321 { "frag", TOK_FRAG }, 322 { "fib", TOK_FIB }, 323 { "ipoptions", TOK_IPOPTS }, 324 { "ipopts", TOK_IPOPTS }, 325 { "iplen", TOK_IPLEN }, 326 { "ipid", TOK_IPID }, 327 { "ipprecedence", TOK_IPPRECEDENCE }, 328 { "dscp", TOK_DSCP }, 329 { "iptos", TOK_IPTOS }, 330 { "ipttl", TOK_IPTTL }, 331 { "ipversion", TOK_IPVER }, 332 { "ipver", TOK_IPVER }, 333 { "estab", TOK_ESTAB }, 334 { "established", TOK_ESTAB }, 335 { "setup", TOK_SETUP }, 336 { "sockarg", TOK_SOCKARG }, 337 { "tcpdatalen", TOK_TCPDATALEN }, 338 { "tcpflags", TOK_TCPFLAGS }, 339 { "tcpflgs", TOK_TCPFLAGS }, 340 { "tcpoptions", TOK_TCPOPTS }, 341 { "tcpopts", TOK_TCPOPTS }, 342 { "tcpseq", TOK_TCPSEQ }, 343 { "tcpack", TOK_TCPACK }, 344 { "tcpwin", TOK_TCPWIN }, 345 { "icmptype", TOK_ICMPTYPES }, 346 { "icmptypes", TOK_ICMPTYPES }, 347 { "dst-ip", TOK_DSTIP }, 348 { "src-ip", TOK_SRCIP }, 349 { "dst-port", TOK_DSTPORT }, 350 { "src-port", TOK_SRCPORT }, 351 { "proto", TOK_PROTO }, 352 { "MAC", TOK_MAC }, 353 { "mac", TOK_MAC }, 354 { "mac-type", TOK_MACTYPE }, 355 { "verrevpath", TOK_VERREVPATH }, 356 { "versrcreach", TOK_VERSRCREACH }, 357 { "antispoof", TOK_ANTISPOOF }, 358 { "ipsec", TOK_IPSEC }, 359 { "icmp6type", TOK_ICMP6TYPES }, 360 { "icmp6types", TOK_ICMP6TYPES }, 361 { "ext6hdr", TOK_EXT6HDR}, 362 { "flow-id", TOK_FLOWID}, 363 { "ipv6", TOK_IPV6}, 364 { "ip6", TOK_IPV6}, 365 { "ipv4", TOK_IPV4}, 366 { "ip4", TOK_IPV4}, 367 { "dst-ipv6", TOK_DSTIP6}, 368 { "dst-ip6", TOK_DSTIP6}, 369 { "src-ipv6", TOK_SRCIP6}, 370 { "src-ip6", TOK_SRCIP6}, 371 { "lookup", TOK_LOOKUP}, 372 { "flow", TOK_FLOW}, 373 { "defer-action", TOK_SKIPACTION }, 374 { "defer-immediate-action", TOK_SKIPACTION }, 375 { "//", TOK_COMMENT }, 376 377 { "not", TOK_NOT }, /* pseudo option */ 378 { "!", /* escape ? */ TOK_NOT }, /* pseudo option */ 379 { "or", TOK_OR }, /* pseudo option */ 380 { "|", /* escape */ TOK_OR }, /* pseudo option */ 381 { "{", TOK_STARTBRACE }, /* pseudo option */ 382 { "(", TOK_STARTBRACE }, /* pseudo option */ 383 { "}", TOK_ENDBRACE }, /* pseudo option */ 384 { ")", TOK_ENDBRACE }, /* pseudo option */ 385 { NULL, 0 } /* terminator */ 386 }; 387 388 void bprint_uint_arg(struct buf_pr *bp, const char *str, uint32_t arg); 389 static int ipfw_get_config(struct cmdline_opts *co, struct format_opts *fo, 390 ipfw_cfg_lheader **pcfg, size_t *psize); 391 static int ipfw_show_config(struct cmdline_opts *co, struct format_opts *fo, 392 ipfw_cfg_lheader *cfg, size_t sz, int ac, char **av); 393 static void ipfw_list_tifaces(void); 394 395 struct tidx; 396 static uint16_t pack_object(struct tidx *tstate, char *name, int otype); 397 static uint16_t pack_table(struct tidx *tstate, char *name); 398 399 static char *table_search_ctlv(ipfw_obj_ctlv *ctlv, uint16_t idx); 400 static void object_sort_ctlv(ipfw_obj_ctlv *ctlv); 401 static char *object_search_ctlv(ipfw_obj_ctlv *ctlv, uint16_t idx, 402 uint16_t type); 403 404 /* 405 * Simple string buffer API. 406 * Used to simplify buffer passing between function and for 407 * transparent overrun handling. 408 */ 409 410 /* 411 * Allocates new buffer of given size @sz. 412 * 413 * Returns 0 on success. 414 */ 415 int 416 bp_alloc(struct buf_pr *b, size_t size) 417 { 418 memset(b, 0, sizeof(struct buf_pr)); 419 420 if ((b->buf = calloc(1, size)) == NULL) 421 return (ENOMEM); 422 423 b->ptr = b->buf; 424 b->size = size; 425 b->avail = b->size; 426 427 return (0); 428 } 429 430 void 431 bp_free(struct buf_pr *b) 432 { 433 434 free(b->buf); 435 } 436 437 /* 438 * Flushes buffer so new writer start from beginning. 439 */ 440 void 441 bp_flush(struct buf_pr *b) 442 { 443 444 b->ptr = b->buf; 445 b->avail = b->size; 446 b->buf[0] = '\0'; 447 } 448 449 /* 450 * Print message specified by @format and args. 451 * Automatically manage buffer space and transparently handle 452 * buffer overruns. 453 * 454 * Returns number of bytes that should have been printed. 455 */ 456 int 457 bprintf(struct buf_pr *b, char *format, ...) 458 { 459 va_list args; 460 int i; 461 462 va_start(args, format); 463 464 i = vsnprintf(b->ptr, b->avail, format, args); 465 va_end(args); 466 467 if (i > b->avail || i < 0) { 468 /* Overflow or print error */ 469 b->avail = 0; 470 } else { 471 b->ptr += i; 472 b->avail -= i; 473 } 474 475 b->needed += i; 476 477 return (i); 478 } 479 480 /* 481 * Special values printer for tablearg-aware opcodes. 482 */ 483 void 484 bprint_uint_arg(struct buf_pr *bp, const char *str, uint32_t arg) 485 { 486 487 if (str != NULL) 488 bprintf(bp, "%s", str); 489 if (arg == IP_FW_TARG) 490 bprintf(bp, "tablearg"); 491 else 492 bprintf(bp, "%u", arg); 493 } 494 495 /* 496 * Helper routine to print a possibly unaligned uint64_t on 497 * various platform. If width > 0, print the value with 498 * the desired width, followed by a space; 499 * otherwise, return the required width. 500 */ 501 int 502 pr_u64(struct buf_pr *b, uint64_t *pd, int width) 503 { 504 #ifdef TCC 505 #define U64_FMT "I64" 506 #else 507 #define U64_FMT "llu" 508 #endif 509 uint64_t u; 510 unsigned long long d; 511 512 bcopy (pd, &u, sizeof(u)); 513 d = u; 514 return (width > 0) ? 515 bprintf(b, "%*" U64_FMT " ", width, d) : 516 snprintf(NULL, 0, "%" U64_FMT, d) ; 517 #undef U64_FMT 518 } 519 520 521 void * 522 safe_calloc(size_t number, size_t size) 523 { 524 void *ret = calloc(number, size); 525 526 if (ret == NULL) 527 err(EX_OSERR, "calloc"); 528 return ret; 529 } 530 531 void * 532 safe_realloc(void *ptr, size_t size) 533 { 534 void *ret = realloc(ptr, size); 535 536 if (ret == NULL) 537 err(EX_OSERR, "realloc"); 538 return ret; 539 } 540 541 /* 542 * Compare things like interface or table names. 543 */ 544 int 545 stringnum_cmp(const char *a, const char *b) 546 { 547 int la, lb; 548 549 la = strlen(a); 550 lb = strlen(b); 551 552 if (la > lb) 553 return (1); 554 else if (la < lb) 555 return (-01); 556 557 return (strcmp(a, b)); 558 } 559 560 561 /* 562 * conditionally runs the command. 563 * Selected options or negative -> getsockopt 564 */ 565 int 566 do_cmd(int optname, void *optval, uintptr_t optlen) 567 { 568 int i; 569 570 if (co.test_only) 571 return 0; 572 573 if (ipfw_socket == -1) 574 ipfw_socket = socket(AF_INET, SOCK_RAW, IPPROTO_RAW); 575 if (ipfw_socket < 0) 576 err(EX_UNAVAILABLE, "socket"); 577 578 if (optname == IP_FW_GET || optname == IP_DUMMYNET_GET || 579 optname == IP_FW_ADD || optname == IP_FW3 || 580 optname == IP_FW_NAT_GET_CONFIG || 581 optname < 0 || 582 optname == IP_FW_NAT_GET_LOG) { 583 if (optname < 0) 584 optname = -optname; 585 i = getsockopt(ipfw_socket, IPPROTO_IP, optname, optval, 586 (socklen_t *)optlen); 587 } else { 588 i = setsockopt(ipfw_socket, IPPROTO_IP, optname, optval, optlen); 589 } 590 return i; 591 } 592 593 /* 594 * do_set3 - pass ipfw control cmd to kernel 595 * @optname: option name 596 * @optval: pointer to option data 597 * @optlen: option length 598 * 599 * Assumes op3 header is already embedded. 600 * Calls setsockopt() with IP_FW3 as kernel-visible opcode. 601 * Returns 0 on success or errno otherwise. 602 */ 603 int 604 do_set3(int optname, ip_fw3_opheader *op3, size_t optlen) 605 { 606 607 if (co.test_only) 608 return (0); 609 610 if (ipfw_socket == -1) 611 ipfw_socket = socket(AF_INET, SOCK_RAW, IPPROTO_RAW); 612 if (ipfw_socket < 0) 613 err(EX_UNAVAILABLE, "socket"); 614 615 op3->opcode = optname; 616 617 return (setsockopt(ipfw_socket, IPPROTO_IP, IP_FW3, op3, optlen)); 618 } 619 620 /* 621 * do_get3 - pass ipfw control cmd to kernel 622 * @optname: option name 623 * @optval: pointer to option data 624 * @optlen: pointer to option length 625 * 626 * Assumes op3 header is already embedded. 627 * Calls getsockopt() with IP_FW3 as kernel-visible opcode. 628 * Returns 0 on success or errno otherwise. 629 */ 630 int 631 do_get3(int optname, ip_fw3_opheader *op3, size_t *optlen) 632 { 633 int error; 634 socklen_t len; 635 636 if (co.test_only) 637 return (0); 638 639 if (ipfw_socket == -1) 640 ipfw_socket = socket(AF_INET, SOCK_RAW, IPPROTO_RAW); 641 if (ipfw_socket < 0) 642 err(EX_UNAVAILABLE, "socket"); 643 644 op3->opcode = optname; 645 646 len = *optlen; 647 error = getsockopt(ipfw_socket, IPPROTO_IP, IP_FW3, op3, &len); 648 *optlen = len; 649 650 return (error); 651 } 652 653 /** 654 * match_token takes a table and a string, returns the value associated 655 * with the string (-1 in case of failure). 656 */ 657 int 658 match_token(struct _s_x *table, const char *string) 659 { 660 struct _s_x *pt; 661 uint i = strlen(string); 662 663 for (pt = table ; i && pt->s != NULL ; pt++) 664 if (strlen(pt->s) == i && !bcmp(string, pt->s, i)) 665 return pt->x; 666 return (-1); 667 } 668 669 /** 670 * match_token_relaxed takes a table and a string, returns the value associated 671 * with the string for the best match. 672 * 673 * Returns: 674 * value from @table for matched records 675 * -1 for non-matched records 676 * -2 if more than one records match @string. 677 */ 678 int 679 match_token_relaxed(struct _s_x *table, const char *string) 680 { 681 struct _s_x *pt, *m; 682 int i, c; 683 684 i = strlen(string); 685 c = 0; 686 687 for (pt = table ; i != 0 && pt->s != NULL ; pt++) { 688 if (strncmp(pt->s, string, i) != 0) 689 continue; 690 m = pt; 691 c++; 692 } 693 694 if (c == 1) 695 return (m->x); 696 697 return (c > 0 ? -2: -1); 698 } 699 700 int 701 get_token(struct _s_x *table, const char *string, const char *errbase) 702 { 703 int tcmd; 704 705 if ((tcmd = match_token_relaxed(table, string)) < 0) 706 errx(EX_USAGE, "%s %s %s", 707 (tcmd == 0) ? "invalid" : "ambiguous", errbase, string); 708 709 return (tcmd); 710 } 711 712 /** 713 * match_value takes a table and a value, returns the string associated 714 * with the value (NULL in case of failure). 715 */ 716 char const * 717 match_value(struct _s_x *p, int value) 718 { 719 for (; p->s != NULL; p++) 720 if (p->x == value) 721 return p->s; 722 return NULL; 723 } 724 725 size_t 726 concat_tokens(char *buf, size_t bufsize, struct _s_x *table, char *delimiter) 727 { 728 struct _s_x *pt; 729 int l; 730 size_t sz; 731 732 for (sz = 0, pt = table ; pt->s != NULL; pt++) { 733 l = snprintf(buf + sz, bufsize - sz, "%s%s", 734 (sz == 0) ? "" : delimiter, pt->s); 735 sz += l; 736 bufsize += l; 737 if (sz > bufsize) 738 return (bufsize); 739 } 740 741 return (sz); 742 } 743 744 /* 745 * helper function to process a set of flags and set bits in the 746 * appropriate masks. 747 */ 748 int 749 fill_flags(struct _s_x *flags, char *p, char **e, uint32_t *set, 750 uint32_t *clear) 751 { 752 char *q; /* points to the separator */ 753 int val; 754 uint32_t *which; /* mask we are working on */ 755 756 while (p && *p) { 757 if (*p == '!') { 758 p++; 759 which = clear; 760 } else 761 which = set; 762 q = strchr(p, ','); 763 if (q) 764 *q++ = '\0'; 765 val = match_token(flags, p); 766 if (val <= 0) { 767 if (e != NULL) 768 *e = p; 769 return (-1); 770 } 771 *which |= (uint32_t)val; 772 p = q; 773 } 774 return (0); 775 } 776 777 void 778 print_flags_buffer(char *buf, size_t sz, struct _s_x *list, uint32_t set) 779 { 780 char const *comma = ""; 781 int i, l; 782 783 for (i = 0; list[i].x != 0; i++) { 784 if ((set & list[i].x) == 0) 785 continue; 786 787 set &= ~list[i].x; 788 l = snprintf(buf, sz, "%s%s", comma, list[i].s); 789 if (l >= sz) 790 return; 791 comma = ","; 792 buf += l; 793 sz -=l; 794 } 795 } 796 797 /* 798 * _substrcmp takes two strings and returns 1 if they do not match, 799 * and 0 if they match exactly or the first string is a sub-string 800 * of the second. A warning is printed to stderr in the case that the 801 * first string is a sub-string of the second. 802 * 803 * This function will be removed in the future through the usual 804 * deprecation process. 805 */ 806 int 807 _substrcmp(const char *str1, const char* str2) 808 { 809 810 if (strncmp(str1, str2, strlen(str1)) != 0) 811 return 1; 812 813 if (strlen(str1) != strlen(str2)) 814 warnx("DEPRECATED: '%s' matched '%s' as a sub-string", 815 str1, str2); 816 return 0; 817 } 818 819 /* 820 * _substrcmp2 takes three strings and returns 1 if the first two do not match, 821 * and 0 if they match exactly or the second string is a sub-string 822 * of the first. A warning is printed to stderr in the case that the 823 * first string does not match the third. 824 * 825 * This function exists to warn about the bizarre construction 826 * strncmp(str, "by", 2) which is used to allow people to use a shortcut 827 * for "bytes". The problem is that in addition to accepting "by", 828 * "byt", "byte", and "bytes", it also excepts "by_rabid_dogs" and any 829 * other string beginning with "by". 830 * 831 * This function will be removed in the future through the usual 832 * deprecation process. 833 */ 834 int 835 _substrcmp2(const char *str1, const char* str2, const char* str3) 836 { 837 838 if (strncmp(str1, str2, strlen(str2)) != 0) 839 return 1; 840 841 if (strcmp(str1, str3) != 0) 842 warnx("DEPRECATED: '%s' matched '%s'", 843 str1, str3); 844 return 0; 845 } 846 847 /* 848 * prints one port, symbolic or numeric 849 */ 850 static void 851 print_port(struct buf_pr *bp, int proto, uint16_t port) 852 { 853 854 if (proto == IPPROTO_ETHERTYPE) { 855 char const *s; 856 857 if (co.do_resolv && (s = match_value(ether_types, port)) ) 858 bprintf(bp, "%s", s); 859 else 860 bprintf(bp, "0x%04x", port); 861 } else { 862 struct servent *se = NULL; 863 if (co.do_resolv) { 864 struct protoent *pe = getprotobynumber(proto); 865 866 se = getservbyport(htons(port), pe ? pe->p_name : NULL); 867 } 868 if (se) 869 bprintf(bp, "%s", se->s_name); 870 else 871 bprintf(bp, "%d", port); 872 } 873 } 874 875 static struct _s_x _port_name[] = { 876 {"dst-port", O_IP_DSTPORT}, 877 {"src-port", O_IP_SRCPORT}, 878 {"ipid", O_IPID}, 879 {"iplen", O_IPLEN}, 880 {"ipttl", O_IPTTL}, 881 {"mac-type", O_MAC_TYPE}, 882 {"tcpdatalen", O_TCPDATALEN}, 883 {"tcpwin", O_TCPWIN}, 884 {"tagged", O_TAGGED}, 885 {NULL, 0} 886 }; 887 888 /* 889 * Print the values in a list 16-bit items of the types above. 890 * XXX todo: add support for mask. 891 */ 892 static void 893 print_newports(struct buf_pr *bp, ipfw_insn_u16 *cmd, int proto, int opcode) 894 { 895 uint16_t *p = cmd->ports; 896 int i; 897 char const *sep; 898 899 if (opcode != 0) { 900 sep = match_value(_port_name, opcode); 901 if (sep == NULL) 902 sep = "???"; 903 bprintf(bp, " %s", sep); 904 } 905 sep = " "; 906 for (i = F_LEN((ipfw_insn *)cmd) - 1; i > 0; i--, p += 2) { 907 bprintf(bp, "%s", sep); 908 print_port(bp, proto, p[0]); 909 if (p[0] != p[1]) { 910 bprintf(bp, "-"); 911 print_port(bp, proto, p[1]); 912 } 913 sep = ","; 914 } 915 } 916 917 /* 918 * Like strtol, but also translates service names into port numbers 919 * for some protocols. 920 * In particular: 921 * proto == -1 disables the protocol check; 922 * proto == IPPROTO_ETHERTYPE looks up an internal table 923 * proto == <some value in /etc/protocols> matches the values there. 924 * Returns *end == s in case the parameter is not found. 925 */ 926 static int 927 strtoport(char *s, char **end, int base, int proto) 928 { 929 char *p, *buf; 930 char *s1; 931 int i; 932 933 *end = s; /* default - not found */ 934 if (*s == '\0') 935 return 0; /* not found */ 936 937 if (isdigit(*s)) 938 return strtol(s, end, base); 939 940 /* 941 * find separator. '\\' escapes the next char. 942 */ 943 for (s1 = s; *s1 && (isalnum(*s1) || *s1 == '\\') ; s1++) 944 if (*s1 == '\\' && s1[1] != '\0') 945 s1++; 946 947 buf = safe_calloc(s1 - s + 1, 1); 948 949 /* 950 * copy into a buffer skipping backslashes 951 */ 952 for (p = s, i = 0; p != s1 ; p++) 953 if (*p != '\\') 954 buf[i++] = *p; 955 buf[i++] = '\0'; 956 957 if (proto == IPPROTO_ETHERTYPE) { 958 i = match_token(ether_types, buf); 959 free(buf); 960 if (i != -1) { /* found */ 961 *end = s1; 962 return i; 963 } 964 } else { 965 struct protoent *pe = NULL; 966 struct servent *se; 967 968 if (proto != 0) 969 pe = getprotobynumber(proto); 970 setservent(1); 971 se = getservbyname(buf, pe ? pe->p_name : NULL); 972 free(buf); 973 if (se != NULL) { 974 *end = s1; 975 return ntohs(se->s_port); 976 } 977 } 978 return 0; /* not found */ 979 } 980 981 /* 982 * Fill the body of the command with the list of port ranges. 983 */ 984 static int 985 fill_newports(ipfw_insn_u16 *cmd, char *av, int proto, int cblen) 986 { 987 uint16_t a, b, *p = cmd->ports; 988 int i = 0; 989 char *s = av; 990 991 while (*s) { 992 a = strtoport(av, &s, 0, proto); 993 if (s == av) /* empty or invalid argument */ 994 return (0); 995 996 CHECK_LENGTH(cblen, i + 2); 997 998 switch (*s) { 999 case '-': /* a range */ 1000 av = s + 1; 1001 b = strtoport(av, &s, 0, proto); 1002 /* Reject expressions like '1-abc' or '1-2-3'. */ 1003 if (s == av || (*s != ',' && *s != '\0')) 1004 return (0); 1005 p[0] = a; 1006 p[1] = b; 1007 break; 1008 case ',': /* comma separated list */ 1009 case '\0': 1010 p[0] = p[1] = a; 1011 break; 1012 default: 1013 warnx("port list: invalid separator <%c> in <%s>", 1014 *s, av); 1015 return (0); 1016 } 1017 1018 i++; 1019 p += 2; 1020 av = s + 1; 1021 } 1022 if (i > 0) { 1023 if (i + 1 > F_LEN_MASK) 1024 errx(EX_DATAERR, "too many ports/ranges\n"); 1025 cmd->o.len |= i + 1; /* leave F_NOT and F_OR untouched */ 1026 } 1027 return (i); 1028 } 1029 1030 /* 1031 * Fill the body of the command with the list of DiffServ codepoints. 1032 */ 1033 static void 1034 fill_dscp(ipfw_insn *cmd, char *av, int cblen) 1035 { 1036 uint32_t *low, *high; 1037 char *s = av, *a; 1038 int code; 1039 1040 cmd->opcode = O_DSCP; 1041 cmd->len |= F_INSN_SIZE(ipfw_insn_u32) + 1; 1042 1043 CHECK_CMDLEN; 1044 1045 low = (uint32_t *)(cmd + 1); 1046 high = low + 1; 1047 1048 *low = 0; 1049 *high = 0; 1050 1051 while (s != NULL) { 1052 a = strchr(s, ','); 1053 1054 if (a != NULL) 1055 *a++ = '\0'; 1056 1057 if (isalpha(*s)) { 1058 if ((code = match_token(f_ipdscp, s)) == -1) 1059 errx(EX_DATAERR, "Unknown DSCP code"); 1060 } else { 1061 code = strtoul(s, NULL, 10); 1062 if (code < 0 || code > 63) 1063 errx(EX_DATAERR, "Invalid DSCP value"); 1064 } 1065 1066 if (code >= 32) 1067 *high |= 1 << (code - 32); 1068 else 1069 *low |= 1 << code; 1070 1071 s = a; 1072 } 1073 } 1074 1075 static struct _s_x icmpcodes[] = { 1076 { "net", ICMP_UNREACH_NET }, 1077 { "host", ICMP_UNREACH_HOST }, 1078 { "protocol", ICMP_UNREACH_PROTOCOL }, 1079 { "port", ICMP_UNREACH_PORT }, 1080 { "needfrag", ICMP_UNREACH_NEEDFRAG }, 1081 { "srcfail", ICMP_UNREACH_SRCFAIL }, 1082 { "net-unknown", ICMP_UNREACH_NET_UNKNOWN }, 1083 { "host-unknown", ICMP_UNREACH_HOST_UNKNOWN }, 1084 { "isolated", ICMP_UNREACH_ISOLATED }, 1085 { "net-prohib", ICMP_UNREACH_NET_PROHIB }, 1086 { "host-prohib", ICMP_UNREACH_HOST_PROHIB }, 1087 { "tosnet", ICMP_UNREACH_TOSNET }, 1088 { "toshost", ICMP_UNREACH_TOSHOST }, 1089 { "filter-prohib", ICMP_UNREACH_FILTER_PROHIB }, 1090 { "host-precedence", ICMP_UNREACH_HOST_PRECEDENCE }, 1091 { "precedence-cutoff", ICMP_UNREACH_PRECEDENCE_CUTOFF }, 1092 { NULL, 0 } 1093 }; 1094 1095 static void 1096 fill_reject_code(u_short *codep, char *str) 1097 { 1098 int val; 1099 char *s; 1100 1101 val = strtoul(str, &s, 0); 1102 if (s == str || *s != '\0' || val >= 0x100) 1103 val = match_token(icmpcodes, str); 1104 if (val < 0) 1105 errx(EX_DATAERR, "unknown ICMP unreachable code ``%s''", str); 1106 *codep = val; 1107 return; 1108 } 1109 1110 static void 1111 print_reject_code(struct buf_pr *bp, uint16_t code) 1112 { 1113 char const *s; 1114 1115 if ((s = match_value(icmpcodes, code)) != NULL) 1116 bprintf(bp, "unreach %s", s); 1117 else 1118 bprintf(bp, "unreach %u", code); 1119 } 1120 1121 /* 1122 * Returns the number of bits set (from left) in a contiguous bitmask, 1123 * or -1 if the mask is not contiguous. 1124 * XXX this needs a proper fix. 1125 * This effectively works on masks in big-endian (network) format. 1126 * when compiled on little endian architectures. 1127 * 1128 * First bit is bit 7 of the first byte -- note, for MAC addresses, 1129 * the first bit on the wire is bit 0 of the first byte. 1130 * len is the max length in bits. 1131 */ 1132 int 1133 contigmask(uint8_t *p, int len) 1134 { 1135 int i, n; 1136 1137 for (i=0; i<len ; i++) 1138 if ( (p[i/8] & (1 << (7 - (i%8)))) == 0) /* first bit unset */ 1139 break; 1140 for (n=i+1; n < len; n++) 1141 if ( (p[n/8] & (1 << (7 - (n%8)))) != 0) 1142 return -1; /* mask not contiguous */ 1143 return i; 1144 } 1145 1146 /* 1147 * print flags set/clear in the two bitmasks passed as parameters. 1148 * There is a specialized check for f_tcpflags. 1149 */ 1150 static void 1151 print_flags(struct buf_pr *bp, char const *name, ipfw_insn *cmd, 1152 struct _s_x *list) 1153 { 1154 char const *comma = ""; 1155 int i; 1156 uint8_t set = cmd->arg1 & 0xff; 1157 uint8_t clear = (cmd->arg1 >> 8) & 0xff; 1158 1159 if (list == f_tcpflags && set == TH_SYN && clear == TH_ACK) { 1160 bprintf(bp, " setup"); 1161 return; 1162 } 1163 1164 bprintf(bp, " %s ", name); 1165 for (i=0; list[i].x != 0; i++) { 1166 if (set & list[i].x) { 1167 set &= ~list[i].x; 1168 bprintf(bp, "%s%s", comma, list[i].s); 1169 comma = ","; 1170 } 1171 if (clear & list[i].x) { 1172 clear &= ~list[i].x; 1173 bprintf(bp, "%s!%s", comma, list[i].s); 1174 comma = ","; 1175 } 1176 } 1177 } 1178 1179 1180 /* 1181 * Print the ip address contained in a command. 1182 */ 1183 static void 1184 print_ip(struct buf_pr *bp, const struct format_opts *fo, ipfw_insn_ip *cmd) 1185 { 1186 struct hostent *he = NULL; 1187 struct in_addr *ia; 1188 uint32_t len = F_LEN((ipfw_insn *)cmd); 1189 uint32_t *a = ((ipfw_insn_u32 *)cmd)->d; 1190 char *t; 1191 1192 bprintf(bp, " "); 1193 if (cmd->o.opcode == O_IP_DST_LOOKUP && len > F_INSN_SIZE(ipfw_insn_u32)) { 1194 uint32_t d = a[1]; 1195 const char *arg = "<invalid>"; 1196 1197 if (d < sizeof(lookup_key)/sizeof(lookup_key[0])) 1198 arg = match_value(rule_options, lookup_key[d]); 1199 t = table_search_ctlv(fo->tstate, ((ipfw_insn *)cmd)->arg1); 1200 bprintf(bp, "lookup %s %s", arg, t); 1201 return; 1202 } 1203 if (cmd->o.opcode == O_IP_SRC_ME || cmd->o.opcode == O_IP_DST_ME) { 1204 bprintf(bp, "me"); 1205 return; 1206 } 1207 if (cmd->o.opcode == O_IP_SRC_LOOKUP || 1208 cmd->o.opcode == O_IP_DST_LOOKUP) { 1209 t = table_search_ctlv(fo->tstate, ((ipfw_insn *)cmd)->arg1); 1210 bprintf(bp, "table(%s", t); 1211 if (len == F_INSN_SIZE(ipfw_insn_u32)) 1212 bprintf(bp, ",%u", *a); 1213 bprintf(bp, ")"); 1214 return; 1215 } 1216 if (cmd->o.opcode == O_IP_SRC_SET || cmd->o.opcode == O_IP_DST_SET) { 1217 uint32_t x, *map = (uint32_t *)&(cmd->mask); 1218 int i, j; 1219 char comma = '{'; 1220 1221 x = cmd->o.arg1 - 1; 1222 x = htonl( ~x ); 1223 cmd->addr.s_addr = htonl(cmd->addr.s_addr); 1224 bprintf(bp, "%s/%d", inet_ntoa(cmd->addr), 1225 contigmask((uint8_t *)&x, 32)); 1226 x = cmd->addr.s_addr = htonl(cmd->addr.s_addr); 1227 x &= 0xff; /* base */ 1228 /* 1229 * Print bits and ranges. 1230 * Locate first bit set (i), then locate first bit unset (j). 1231 * If we have 3+ consecutive bits set, then print them as a 1232 * range, otherwise only print the initial bit and rescan. 1233 */ 1234 for (i=0; i < cmd->o.arg1; i++) 1235 if (map[i/32] & (1<<(i & 31))) { 1236 for (j=i+1; j < cmd->o.arg1; j++) 1237 if (!(map[ j/32] & (1<<(j & 31)))) 1238 break; 1239 bprintf(bp, "%c%d", comma, i+x); 1240 if (j>i+2) { /* range has at least 3 elements */ 1241 bprintf(bp, "-%d", j-1+x); 1242 i = j-1; 1243 } 1244 comma = ','; 1245 } 1246 bprintf(bp, "}"); 1247 return; 1248 } 1249 /* 1250 * len == 2 indicates a single IP, whereas lists of 1 or more 1251 * addr/mask pairs have len = (2n+1). We convert len to n so we 1252 * use that to count the number of entries. 1253 */ 1254 for (len = len / 2; len > 0; len--, a += 2) { 1255 int mb = /* mask length */ 1256 (cmd->o.opcode == O_IP_SRC || cmd->o.opcode == O_IP_DST) ? 1257 32 : contigmask((uint8_t *)&(a[1]), 32); 1258 if (mb == 32 && co.do_resolv) 1259 he = gethostbyaddr((char *)&(a[0]), sizeof(u_long), AF_INET); 1260 if (he != NULL) /* resolved to name */ 1261 bprintf(bp, "%s", he->h_name); 1262 else if (mb == 0) /* any */ 1263 bprintf(bp, "any"); 1264 else { /* numeric IP followed by some kind of mask */ 1265 ia = (struct in_addr *)&a[0]; 1266 bprintf(bp, "%s", inet_ntoa(*ia)); 1267 if (mb < 0) { 1268 ia = (struct in_addr *)&a[1]; 1269 bprintf(bp, ":%s", inet_ntoa(*ia)); 1270 } else if (mb < 32) 1271 bprintf(bp, "/%d", mb); 1272 } 1273 if (len > 1) 1274 bprintf(bp, ","); 1275 } 1276 } 1277 1278 /* 1279 * prints a MAC address/mask pair 1280 */ 1281 static void 1282 format_mac(struct buf_pr *bp, uint8_t *addr, uint8_t *mask) 1283 { 1284 int l = contigmask(mask, 48); 1285 1286 if (l == 0) 1287 bprintf(bp, " any"); 1288 else { 1289 bprintf(bp, " %02x:%02x:%02x:%02x:%02x:%02x", 1290 addr[0], addr[1], addr[2], addr[3], addr[4], addr[5]); 1291 if (l == -1) 1292 bprintf(bp, "&%02x:%02x:%02x:%02x:%02x:%02x", 1293 mask[0], mask[1], mask[2], 1294 mask[3], mask[4], mask[5]); 1295 else if (l < 48) 1296 bprintf(bp, "/%d", l); 1297 } 1298 } 1299 1300 static void 1301 print_mac(struct buf_pr *bp, ipfw_insn_mac *mac) 1302 { 1303 1304 bprintf(bp, " MAC"); 1305 format_mac(bp, mac->addr, mac->mask); 1306 format_mac(bp, mac->addr + 6, mac->mask + 6); 1307 } 1308 1309 static void 1310 fill_icmptypes(ipfw_insn_u32 *cmd, char *av) 1311 { 1312 uint8_t type; 1313 1314 cmd->d[0] = 0; 1315 while (*av) { 1316 if (*av == ',') 1317 av++; 1318 1319 type = strtoul(av, &av, 0); 1320 1321 if (*av != ',' && *av != '\0') 1322 errx(EX_DATAERR, "invalid ICMP type"); 1323 1324 if (type > 31) 1325 errx(EX_DATAERR, "ICMP type out of range"); 1326 1327 cmd->d[0] |= 1 << type; 1328 } 1329 cmd->o.opcode = O_ICMPTYPE; 1330 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32); 1331 } 1332 1333 static void 1334 print_icmptypes(struct buf_pr *bp, ipfw_insn_u32 *cmd) 1335 { 1336 int i; 1337 char sep= ' '; 1338 1339 bprintf(bp, " icmptypes"); 1340 for (i = 0; i < 32; i++) { 1341 if ( (cmd->d[0] & (1 << (i))) == 0) 1342 continue; 1343 bprintf(bp, "%c%d", sep, i); 1344 sep = ','; 1345 } 1346 } 1347 1348 static void 1349 print_dscp(struct buf_pr *bp, ipfw_insn_u32 *cmd) 1350 { 1351 int i = 0; 1352 uint32_t *v; 1353 char sep= ' '; 1354 const char *code; 1355 1356 bprintf(bp, " dscp"); 1357 v = cmd->d; 1358 while (i < 64) { 1359 if (*v & (1 << i)) { 1360 if ((code = match_value(f_ipdscp, i)) != NULL) 1361 bprintf(bp, "%c%s", sep, code); 1362 else 1363 bprintf(bp, "%c%d", sep, i); 1364 sep = ','; 1365 } 1366 1367 if ((++i % 32) == 0) 1368 v++; 1369 } 1370 } 1371 1372 #define insntod(cmd, type) ((ipfw_insn_ ## type *)(cmd)) 1373 struct show_state { 1374 struct ip_fw_rule *rule; 1375 const ipfw_insn *eaction; 1376 uint8_t *printed; 1377 int flags; 1378 #define HAVE_PROTO 0x0001 1379 #define HAVE_SRCIP 0x0002 1380 #define HAVE_DSTIP 0x0004 1381 #define HAVE_PROBE_STATE 0x0008 1382 int proto; 1383 int or_block; 1384 }; 1385 1386 static int 1387 init_show_state(struct show_state *state, struct ip_fw_rule *rule) 1388 { 1389 1390 state->printed = calloc(rule->cmd_len, sizeof(uint8_t)); 1391 if (state->printed == NULL) 1392 return (ENOMEM); 1393 state->rule = rule; 1394 state->eaction = NULL; 1395 state->flags = 0; 1396 state->proto = 0; 1397 state->or_block = 0; 1398 return (0); 1399 } 1400 1401 static void 1402 free_show_state(struct show_state *state) 1403 { 1404 1405 free(state->printed); 1406 } 1407 1408 static uint8_t 1409 is_printed_opcode(struct show_state *state, const ipfw_insn *cmd) 1410 { 1411 1412 return (state->printed[cmd - state->rule->cmd]); 1413 } 1414 1415 static void 1416 mark_printed(struct show_state *state, const ipfw_insn *cmd) 1417 { 1418 1419 state->printed[cmd - state->rule->cmd] = 1; 1420 } 1421 1422 static void 1423 print_limit_mask(struct buf_pr *bp, const ipfw_insn_limit *limit) 1424 { 1425 struct _s_x *p = limit_masks; 1426 char const *comma = " "; 1427 uint8_t x; 1428 1429 for (x = limit->limit_mask; p->x != 0; p++) { 1430 if ((x & p->x) == p->x) { 1431 x &= ~p->x; 1432 bprintf(bp, "%s%s", comma, p->s); 1433 comma = ","; 1434 } 1435 } 1436 bprint_uint_arg(bp, " ", limit->conn_limit); 1437 } 1438 1439 static int 1440 print_instruction(struct buf_pr *bp, const struct format_opts *fo, 1441 struct show_state *state, ipfw_insn *cmd) 1442 { 1443 struct protoent *pe; 1444 struct passwd *pwd; 1445 struct group *grp; 1446 const char *s; 1447 double d; 1448 1449 if (is_printed_opcode(state, cmd)) 1450 return (0); 1451 if ((cmd->len & F_OR) != 0 && state->or_block == 0) 1452 bprintf(bp, " {"); 1453 if (cmd->opcode != O_IN && (cmd->len & F_NOT) != 0) 1454 bprintf(bp, " not"); 1455 1456 switch (cmd->opcode) { 1457 case O_PROB: 1458 d = 1.0 * insntod(cmd, u32)->d[0] / 0x7fffffff; 1459 bprintf(bp, "prob %f ", d); 1460 break; 1461 case O_PROBE_STATE: /* no need to print anything here */ 1462 state->flags |= HAVE_PROBE_STATE; 1463 break; 1464 case O_IP_SRC: 1465 case O_IP_SRC_LOOKUP: 1466 case O_IP_SRC_MASK: 1467 case O_IP_SRC_ME: 1468 case O_IP_SRC_SET: 1469 if (state->flags & HAVE_SRCIP) 1470 bprintf(bp, " src-ip"); 1471 print_ip(bp, fo, insntod(cmd, ip)); 1472 break; 1473 case O_IP_DST: 1474 case O_IP_DST_LOOKUP: 1475 case O_IP_DST_MASK: 1476 case O_IP_DST_ME: 1477 case O_IP_DST_SET: 1478 if (state->flags & HAVE_DSTIP) 1479 bprintf(bp, " dst-ip"); 1480 print_ip(bp, fo, insntod(cmd, ip)); 1481 break; 1482 case O_IP6_SRC: 1483 case O_IP6_SRC_MASK: 1484 case O_IP6_SRC_ME: 1485 if (state->flags & HAVE_SRCIP) 1486 bprintf(bp, " src-ip6"); 1487 print_ip6(bp, insntod(cmd, ip6)); 1488 break; 1489 case O_IP6_DST: 1490 case O_IP6_DST_MASK: 1491 case O_IP6_DST_ME: 1492 if (state->flags & HAVE_DSTIP) 1493 bprintf(bp, " dst-ip6"); 1494 print_ip6(bp, insntod(cmd, ip6)); 1495 break; 1496 case O_FLOW6ID: 1497 print_flow6id(bp, insntod(cmd, u32)); 1498 break; 1499 case O_IP_DSTPORT: 1500 case O_IP_SRCPORT: 1501 print_newports(bp, insntod(cmd, u16), state->proto, 1502 (state->flags & (HAVE_SRCIP | HAVE_DSTIP)) == 1503 (HAVE_SRCIP | HAVE_DSTIP) ? cmd->opcode: 0); 1504 break; 1505 case O_PROTO: 1506 pe = getprotobynumber(cmd->arg1); 1507 if (state->flags & HAVE_PROTO) 1508 bprintf(bp, " proto"); 1509 if (pe != NULL) 1510 bprintf(bp, " %s", pe->p_name); 1511 else 1512 bprintf(bp, " %u", cmd->arg1); 1513 break; 1514 case O_MACADDR2: 1515 print_mac(bp, insntod(cmd, mac)); 1516 break; 1517 case O_MAC_TYPE: 1518 print_newports(bp, insntod(cmd, u16), 1519 IPPROTO_ETHERTYPE, cmd->opcode); 1520 break; 1521 case O_FRAG: 1522 bprintf(bp, " frag"); 1523 break; 1524 case O_FIB: 1525 bprintf(bp, " fib %u", cmd->arg1); 1526 break; 1527 case O_SOCKARG: 1528 bprintf(bp, " sockarg"); 1529 break; 1530 case O_IN: 1531 bprintf(bp, cmd->len & F_NOT ? " out" : " in"); 1532 break; 1533 case O_DIVERTED: 1534 switch (cmd->arg1) { 1535 case 3: 1536 bprintf(bp, " diverted"); 1537 break; 1538 case 2: 1539 bprintf(bp, " diverted-output"); 1540 break; 1541 case 1: 1542 bprintf(bp, " diverted-loopback"); 1543 break; 1544 default: 1545 bprintf(bp, " diverted-?<%u>", cmd->arg1); 1546 break; 1547 } 1548 break; 1549 case O_LAYER2: 1550 bprintf(bp, " layer2"); 1551 break; 1552 case O_XMIT: 1553 case O_RECV: 1554 case O_VIA: 1555 if (cmd->opcode == O_XMIT) 1556 s = "xmit"; 1557 else if (cmd->opcode == O_RECV) 1558 s = "recv"; 1559 else /* if (cmd->opcode == O_VIA) */ 1560 s = "via"; 1561 switch (insntod(cmd, if)->name[0]) { 1562 case '\0': 1563 bprintf(bp, " %s %s", s, 1564 inet_ntoa(insntod(cmd, if)->p.ip)); 1565 break; 1566 case '\1': 1567 bprintf(bp, " %s table(%s)", s, 1568 table_search_ctlv(fo->tstate, 1569 insntod(cmd, if)->p.kidx)); 1570 break; 1571 default: 1572 bprintf(bp, " %s %s", s, 1573 insntod(cmd, if)->name); 1574 } 1575 break; 1576 case O_IP_FLOW_LOOKUP: 1577 s = table_search_ctlv(fo->tstate, cmd->arg1); 1578 bprintf(bp, " flow table(%s", s); 1579 if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_u32)) 1580 bprintf(bp, ",%u", insntod(cmd, u32)->d[0]); 1581 bprintf(bp, ")"); 1582 break; 1583 case O_IPID: 1584 case O_IPTTL: 1585 case O_IPLEN: 1586 case O_TCPDATALEN: 1587 case O_TCPWIN: 1588 if (F_LEN(cmd) == 1) { 1589 switch (cmd->opcode) { 1590 case O_IPID: 1591 s = "ipid"; 1592 break; 1593 case O_IPTTL: 1594 s = "ipttl"; 1595 break; 1596 case O_IPLEN: 1597 s = "iplen"; 1598 break; 1599 case O_TCPDATALEN: 1600 s = "tcpdatalen"; 1601 break; 1602 case O_TCPWIN: 1603 s = "tcpwin"; 1604 break; 1605 } 1606 bprintf(bp, " %s %u", s, cmd->arg1); 1607 } else 1608 print_newports(bp, insntod(cmd, u16), 0, 1609 cmd->opcode); 1610 break; 1611 case O_IPVER: 1612 bprintf(bp, " ipver %u", cmd->arg1); 1613 break; 1614 case O_IPPRECEDENCE: 1615 bprintf(bp, " ipprecedence %u", cmd->arg1 >> 5); 1616 break; 1617 case O_DSCP: 1618 print_dscp(bp, insntod(cmd, u32)); 1619 break; 1620 case O_IPOPT: 1621 print_flags(bp, "ipoptions", cmd, f_ipopts); 1622 break; 1623 case O_IPTOS: 1624 print_flags(bp, "iptos", cmd, f_iptos); 1625 break; 1626 case O_ICMPTYPE: 1627 print_icmptypes(bp, insntod(cmd, u32)); 1628 break; 1629 case O_ESTAB: 1630 bprintf(bp, " established"); 1631 break; 1632 case O_TCPFLAGS: 1633 print_flags(bp, "tcpflags", cmd, f_tcpflags); 1634 break; 1635 case O_TCPOPTS: 1636 print_flags(bp, "tcpoptions", cmd, f_tcpopts); 1637 break; 1638 case O_TCPACK: 1639 bprintf(bp, " tcpack %d", 1640 ntohl(insntod(cmd, u32)->d[0])); 1641 break; 1642 case O_TCPSEQ: 1643 bprintf(bp, " tcpseq %d", 1644 ntohl(insntod(cmd, u32)->d[0])); 1645 break; 1646 case O_UID: 1647 pwd = getpwuid(insntod(cmd, u32)->d[0]); 1648 if (pwd != NULL) 1649 bprintf(bp, " uid %s", pwd->pw_name); 1650 else 1651 bprintf(bp, " uid %u", 1652 insntod(cmd, u32)->d[0]); 1653 break; 1654 case O_GID: 1655 grp = getgrgid(insntod(cmd, u32)->d[0]); 1656 if (grp != NULL) 1657 bprintf(bp, " gid %s", grp->gr_name); 1658 else 1659 bprintf(bp, " gid %u", 1660 insntod(cmd, u32)->d[0]); 1661 break; 1662 case O_JAIL: 1663 bprintf(bp, " jail %d", insntod(cmd, u32)->d[0]); 1664 break; 1665 case O_VERREVPATH: 1666 bprintf(bp, " verrevpath"); 1667 break; 1668 case O_VERSRCREACH: 1669 bprintf(bp, " versrcreach"); 1670 break; 1671 case O_ANTISPOOF: 1672 bprintf(bp, " antispoof"); 1673 break; 1674 case O_IPSEC: 1675 bprintf(bp, " ipsec"); 1676 break; 1677 case O_NOP: 1678 bprintf(bp, " // %s", (char *)(cmd + 1)); 1679 break; 1680 case O_KEEP_STATE: 1681 if (state->flags & HAVE_PROBE_STATE) 1682 bprintf(bp, " keep-state"); 1683 else 1684 bprintf(bp, " record-state"); 1685 bprintf(bp, " :%s", 1686 object_search_ctlv(fo->tstate, cmd->arg1, 1687 IPFW_TLV_STATE_NAME)); 1688 break; 1689 case O_LIMIT: 1690 if (state->flags & HAVE_PROBE_STATE) 1691 bprintf(bp, " limit"); 1692 else 1693 bprintf(bp, " set-limit"); 1694 print_limit_mask(bp, insntod(cmd, limit)); 1695 bprintf(bp, " :%s", 1696 object_search_ctlv(fo->tstate, cmd->arg1, 1697 IPFW_TLV_STATE_NAME)); 1698 break; 1699 case O_IP6: 1700 bprintf(bp, " ip6"); 1701 break; 1702 case O_IP4: 1703 bprintf(bp, " ip4"); 1704 break; 1705 case O_ICMP6TYPE: 1706 print_icmp6types(bp, insntod(cmd, u32)); 1707 break; 1708 case O_EXT_HDR: 1709 print_ext6hdr(bp, cmd); 1710 break; 1711 case O_TAGGED: 1712 if (F_LEN(cmd) == 1) 1713 bprint_uint_arg(bp, " tagged ", cmd->arg1); 1714 else 1715 print_newports(bp, insntod(cmd, u16), 1716 0, O_TAGGED); 1717 break; 1718 case O_SKIP_ACTION: 1719 bprintf(bp, " defer-immediate-action"); 1720 break; 1721 default: 1722 bprintf(bp, " [opcode %d len %d]", cmd->opcode, 1723 cmd->len); 1724 } 1725 if (cmd->len & F_OR) { 1726 bprintf(bp, " or"); 1727 state->or_block = 1; 1728 } else if (state->or_block != 0) { 1729 bprintf(bp, " }"); 1730 state->or_block = 0; 1731 } 1732 mark_printed(state, cmd); 1733 1734 return (1); 1735 } 1736 1737 static ipfw_insn * 1738 print_opcode(struct buf_pr *bp, struct format_opts *fo, 1739 struct show_state *state, int opcode) 1740 { 1741 ipfw_insn *cmd; 1742 int l; 1743 1744 for (l = state->rule->act_ofs, cmd = state->rule->cmd; 1745 l > 0; l -= F_LEN(cmd), cmd += F_LEN(cmd)) { 1746 /* We use zero opcode to print the rest of options */ 1747 if (opcode >= 0 && cmd->opcode != opcode) 1748 continue; 1749 /* 1750 * Skip O_NOP, when we printing the rest 1751 * of options, it will be handled separately. 1752 */ 1753 if (cmd->opcode == O_NOP && opcode != O_NOP) 1754 continue; 1755 if (!print_instruction(bp, fo, state, cmd)) 1756 continue; 1757 return (cmd); 1758 } 1759 return (NULL); 1760 } 1761 1762 static void 1763 print_fwd(struct buf_pr *bp, const ipfw_insn *cmd) 1764 { 1765 char buf[INET6_ADDRSTRLEN + IF_NAMESIZE + 2]; 1766 ipfw_insn_sa6 *sa6; 1767 ipfw_insn_sa *sa; 1768 uint16_t port; 1769 1770 if (cmd->opcode == O_FORWARD_IP) { 1771 sa = insntod(cmd, sa); 1772 port = sa->sa.sin_port; 1773 if (sa->sa.sin_addr.s_addr == INADDR_ANY) 1774 bprintf(bp, "fwd tablearg"); 1775 else 1776 bprintf(bp, "fwd %s", inet_ntoa(sa->sa.sin_addr)); 1777 } else { 1778 sa6 = insntod(cmd, sa6); 1779 port = sa6->sa.sin6_port; 1780 bprintf(bp, "fwd "); 1781 if (getnameinfo((const struct sockaddr *)&sa6->sa, 1782 sizeof(struct sockaddr_in6), buf, sizeof(buf), NULL, 0, 1783 NI_NUMERICHOST) == 0) 1784 bprintf(bp, "%s", buf); 1785 } 1786 if (port != 0) 1787 bprintf(bp, ",%u", port); 1788 } 1789 1790 static int 1791 print_action_instruction(struct buf_pr *bp, const struct format_opts *fo, 1792 struct show_state *state, const ipfw_insn *cmd) 1793 { 1794 const char *s; 1795 1796 if (is_printed_opcode(state, cmd)) 1797 return (0); 1798 switch (cmd->opcode) { 1799 case O_CHECK_STATE: 1800 bprintf(bp, "check-state"); 1801 if (cmd->arg1 != 0) 1802 s = object_search_ctlv(fo->tstate, cmd->arg1, 1803 IPFW_TLV_STATE_NAME); 1804 else 1805 s = NULL; 1806 bprintf(bp, " :%s", s ? s: "any"); 1807 break; 1808 case O_ACCEPT: 1809 bprintf(bp, "allow"); 1810 break; 1811 case O_COUNT: 1812 bprintf(bp, "count"); 1813 break; 1814 case O_DENY: 1815 bprintf(bp, "deny"); 1816 break; 1817 case O_REJECT: 1818 if (cmd->arg1 == ICMP_REJECT_RST) 1819 bprintf(bp, "reset"); 1820 else if (cmd->arg1 == ICMP_REJECT_ABORT) 1821 bprintf(bp, "abort"); 1822 else if (cmd->arg1 == ICMP_UNREACH_HOST) 1823 bprintf(bp, "reject"); 1824 else 1825 print_reject_code(bp, cmd->arg1); 1826 break; 1827 case O_UNREACH6: 1828 if (cmd->arg1 == ICMP6_UNREACH_RST) 1829 bprintf(bp, "reset6"); 1830 else if (cmd->arg1 == ICMP6_UNREACH_ABORT) 1831 bprintf(bp, "abort6"); 1832 else 1833 print_unreach6_code(bp, cmd->arg1); 1834 break; 1835 case O_SKIPTO: 1836 bprint_uint_arg(bp, "skipto ", cmd->arg1); 1837 break; 1838 case O_PIPE: 1839 bprint_uint_arg(bp, "pipe ", cmd->arg1); 1840 break; 1841 case O_QUEUE: 1842 bprint_uint_arg(bp, "queue ", cmd->arg1); 1843 break; 1844 case O_DIVERT: 1845 bprint_uint_arg(bp, "divert ", cmd->arg1); 1846 break; 1847 case O_TEE: 1848 bprint_uint_arg(bp, "tee ", cmd->arg1); 1849 break; 1850 case O_NETGRAPH: 1851 bprint_uint_arg(bp, "netgraph ", cmd->arg1); 1852 break; 1853 case O_NGTEE: 1854 bprint_uint_arg(bp, "ngtee ", cmd->arg1); 1855 break; 1856 case O_FORWARD_IP: 1857 case O_FORWARD_IP6: 1858 print_fwd(bp, cmd); 1859 break; 1860 case O_LOG: 1861 if (insntod(cmd, log)->max_log > 0) 1862 bprintf(bp, " log logamount %d", 1863 insntod(cmd, log)->max_log); 1864 else 1865 bprintf(bp, " log"); 1866 break; 1867 case O_ALTQ: 1868 #ifndef NO_ALTQ 1869 print_altq_cmd(bp, insntod(cmd, altq)); 1870 #endif 1871 break; 1872 case O_TAG: 1873 bprint_uint_arg(bp, cmd->len & F_NOT ? " untag ": 1874 " tag ", cmd->arg1); 1875 break; 1876 case O_NAT: 1877 if (cmd->arg1 != IP_FW_NAT44_GLOBAL) 1878 bprint_uint_arg(bp, "nat ", cmd->arg1); 1879 else 1880 bprintf(bp, "nat global"); 1881 break; 1882 case O_SETFIB: 1883 if (cmd->arg1 == IP_FW_TARG) 1884 bprint_uint_arg(bp, "setfib ", cmd->arg1); 1885 else 1886 bprintf(bp, "setfib %u", cmd->arg1 & 0x7FFF); 1887 break; 1888 case O_EXTERNAL_ACTION: 1889 /* 1890 * The external action can consists of two following 1891 * each other opcodes - O_EXTERNAL_ACTION and 1892 * O_EXTERNAL_INSTANCE. The first contains the ID of 1893 * name of external action. The second contains the ID 1894 * of name of external action instance. 1895 * NOTE: in case when external action has no named 1896 * instances support, the second opcode isn't needed. 1897 */ 1898 state->eaction = cmd; 1899 s = object_search_ctlv(fo->tstate, cmd->arg1, 1900 IPFW_TLV_EACTION); 1901 if (match_token(rule_eactions, s) != -1) 1902 bprintf(bp, "%s", s); 1903 else 1904 bprintf(bp, "eaction %s", s); 1905 break; 1906 case O_EXTERNAL_INSTANCE: 1907 if (state->eaction == NULL) 1908 break; 1909 /* 1910 * XXX: we need to teach ipfw(9) to rewrite opcodes 1911 * in the user buffer on rule addition. When we add 1912 * the rule, we specify zero TLV type for 1913 * O_EXTERNAL_INSTANCE object. To show correct 1914 * rule after `ipfw add` we need to search instance 1915 * name with zero type. But when we do `ipfw show` 1916 * we calculate TLV type using IPFW_TLV_EACTION_NAME() 1917 * macro. 1918 */ 1919 s = object_search_ctlv(fo->tstate, cmd->arg1, 0); 1920 if (s == NULL) 1921 s = object_search_ctlv(fo->tstate, 1922 cmd->arg1, IPFW_TLV_EACTION_NAME( 1923 state->eaction->arg1)); 1924 bprintf(bp, " %s", s); 1925 break; 1926 case O_EXTERNAL_DATA: 1927 if (state->eaction == NULL) 1928 break; 1929 /* 1930 * Currently we support data formatting only for 1931 * external data with datalen u16. For unknown data 1932 * print its size in bytes. 1933 */ 1934 if (cmd->len == F_INSN_SIZE(ipfw_insn)) 1935 bprintf(bp, " %u", cmd->arg1); 1936 else 1937 bprintf(bp, " %ubytes", 1938 cmd->len * sizeof(uint32_t)); 1939 break; 1940 case O_SETDSCP: 1941 if (cmd->arg1 == IP_FW_TARG) { 1942 bprintf(bp, "setdscp tablearg"); 1943 break; 1944 } 1945 s = match_value(f_ipdscp, cmd->arg1 & 0x3F); 1946 if (s != NULL) 1947 bprintf(bp, "setdscp %s", s); 1948 else 1949 bprintf(bp, "setdscp %s", cmd->arg1 & 0x3F); 1950 break; 1951 case O_REASS: 1952 bprintf(bp, "reass"); 1953 break; 1954 case O_CALLRETURN: 1955 if (cmd->len & F_NOT) 1956 bprintf(bp, "return"); 1957 else 1958 bprint_uint_arg(bp, "call ", cmd->arg1); 1959 break; 1960 default: 1961 bprintf(bp, "** unrecognized action %d len %d ", 1962 cmd->opcode, cmd->len); 1963 } 1964 mark_printed(state, cmd); 1965 1966 return (1); 1967 } 1968 1969 1970 static ipfw_insn * 1971 print_action(struct buf_pr *bp, struct format_opts *fo, 1972 struct show_state *state, uint8_t opcode) 1973 { 1974 ipfw_insn *cmd; 1975 int l; 1976 1977 for (l = state->rule->cmd_len - state->rule->act_ofs, 1978 cmd = ACTION_PTR(state->rule); l > 0; 1979 l -= F_LEN(cmd), cmd += F_LEN(cmd)) { 1980 if (cmd->opcode != opcode) 1981 continue; 1982 if (!print_action_instruction(bp, fo, state, cmd)) 1983 continue; 1984 return (cmd); 1985 } 1986 return (NULL); 1987 } 1988 1989 static void 1990 print_proto(struct buf_pr *bp, struct format_opts *fo, 1991 struct show_state *state) 1992 { 1993 ipfw_insn *cmd; 1994 int l, proto, ip4, ip6, tmp; 1995 1996 /* Count all O_PROTO, O_IP4, O_IP6 instructions. */ 1997 proto = tmp = ip4 = ip6 = 0; 1998 for (l = state->rule->act_ofs, cmd = state->rule->cmd; 1999 l > 0; l -= F_LEN(cmd), cmd += F_LEN(cmd)) { 2000 switch (cmd->opcode) { 2001 case O_PROTO: 2002 proto++; 2003 break; 2004 case O_IP4: 2005 ip4 = 1; 2006 if (cmd->len & F_OR) 2007 ip4++; 2008 break; 2009 case O_IP6: 2010 ip6 = 1; 2011 if (cmd->len & F_OR) 2012 ip6++; 2013 break; 2014 default: 2015 continue; 2016 } 2017 } 2018 if (proto == 0 && ip4 == 0 && ip6 == 0) { 2019 state->proto = IPPROTO_IP; 2020 state->flags |= HAVE_PROTO; 2021 bprintf(bp, " ip"); 2022 return; 2023 } 2024 /* To handle the case { ip4 or ip6 }, print opcode with F_OR first */ 2025 cmd = NULL; 2026 if (ip4 || ip6) 2027 cmd = print_opcode(bp, fo, state, ip4 > ip6 ? O_IP4: O_IP6); 2028 if (cmd != NULL && (cmd->len & F_OR)) 2029 cmd = print_opcode(bp, fo, state, ip4 > ip6 ? O_IP6: O_IP4); 2030 if (cmd == NULL || (cmd->len & F_OR)) 2031 for (l = proto; l > 0; l--) { 2032 cmd = print_opcode(bp, fo, state, O_PROTO); 2033 if (cmd != NULL && (cmd->len & F_OR) == 0) 2034 break; 2035 tmp = cmd->arg1; 2036 } 2037 /* Initialize proto, it is used by print_newports() */ 2038 if (tmp != 0) 2039 state->proto = tmp; 2040 else if (ip6 != 0) 2041 state->proto = IPPROTO_IPV6; 2042 else 2043 state->proto = IPPROTO_IP; 2044 state->flags |= HAVE_PROTO; 2045 } 2046 2047 static int 2048 match_opcode(int opcode, const int opcodes[], size_t nops) 2049 { 2050 int i; 2051 2052 for (i = 0; i < nops; i++) 2053 if (opcode == opcodes[i]) 2054 return (1); 2055 return (0); 2056 } 2057 2058 static void 2059 print_address(struct buf_pr *bp, struct format_opts *fo, 2060 struct show_state *state, const int opcodes[], size_t nops, int portop, 2061 int flag) 2062 { 2063 ipfw_insn *cmd; 2064 int count, l, portcnt, pf; 2065 2066 count = portcnt = 0; 2067 for (l = state->rule->act_ofs, cmd = state->rule->cmd; 2068 l > 0; l -= F_LEN(cmd), cmd += F_LEN(cmd)) { 2069 if (match_opcode(cmd->opcode, opcodes, nops)) 2070 count++; 2071 else if (cmd->opcode == portop) 2072 portcnt++; 2073 } 2074 if (count == 0) 2075 bprintf(bp, " any"); 2076 for (l = state->rule->act_ofs, cmd = state->rule->cmd; 2077 l > 0 && count > 0; l -= F_LEN(cmd), cmd += F_LEN(cmd)) { 2078 if (!match_opcode(cmd->opcode, opcodes, nops)) 2079 continue; 2080 print_instruction(bp, fo, state, cmd); 2081 if ((cmd->len & F_OR) == 0) 2082 break; 2083 count--; 2084 } 2085 /* 2086 * If several O_IP_?PORT opcodes specified, leave them to the 2087 * options section. 2088 */ 2089 if (portcnt == 1) { 2090 for (l = state->rule->act_ofs, cmd = state->rule->cmd, pf = 0; 2091 l > 0; l -= F_LEN(cmd), cmd += F_LEN(cmd)) { 2092 if (cmd->opcode != portop) { 2093 pf = (cmd->len & F_OR); 2094 continue; 2095 } 2096 /* Print opcode iff it is not in OR block. */ 2097 if (pf == 0 && (cmd->len & F_OR) == 0) 2098 print_instruction(bp, fo, state, cmd); 2099 break; 2100 } 2101 } 2102 state->flags |= flag; 2103 } 2104 2105 static const int action_opcodes[] = { 2106 O_CHECK_STATE, O_ACCEPT, O_COUNT, O_DENY, O_REJECT, 2107 O_UNREACH6, O_SKIPTO, O_PIPE, O_QUEUE, O_DIVERT, O_TEE, 2108 O_NETGRAPH, O_NGTEE, O_FORWARD_IP, O_FORWARD_IP6, O_NAT, 2109 O_SETFIB, O_SETDSCP, O_REASS, O_CALLRETURN, 2110 /* keep the following opcodes at the end of the list */ 2111 O_EXTERNAL_ACTION, O_EXTERNAL_INSTANCE, O_EXTERNAL_DATA 2112 }; 2113 2114 static const int modifier_opcodes[] = { 2115 O_LOG, O_ALTQ, O_TAG 2116 }; 2117 2118 static const int src_opcodes[] = { 2119 O_IP_SRC, O_IP_SRC_LOOKUP, O_IP_SRC_MASK, O_IP_SRC_ME, 2120 O_IP_SRC_SET, O_IP6_SRC, O_IP6_SRC_MASK, O_IP6_SRC_ME 2121 }; 2122 2123 static const int dst_opcodes[] = { 2124 O_IP_DST, O_IP_DST_LOOKUP, O_IP_DST_MASK, O_IP_DST_ME, 2125 O_IP_DST_SET, O_IP6_DST, O_IP6_DST_MASK, O_IP6_DST_ME 2126 }; 2127 2128 static void 2129 show_static_rule(struct cmdline_opts *co, struct format_opts *fo, 2130 struct buf_pr *bp, struct ip_fw_rule *rule, struct ip_fw_bcounter *cntr) 2131 { 2132 struct show_state state; 2133 ipfw_insn *cmd; 2134 static int twidth = 0; 2135 int i; 2136 2137 /* Print # DISABLED or skip the rule */ 2138 if ((fo->set_mask & (1 << rule->set)) == 0) { 2139 /* disabled mask */ 2140 if (!co->show_sets) 2141 return; 2142 else 2143 bprintf(bp, "# DISABLED "); 2144 } 2145 if (init_show_state(&state, rule) != 0) { 2146 warn("init_show_state() failed"); 2147 return; 2148 } 2149 bprintf(bp, "%05u ", rule->rulenum); 2150 2151 /* Print counters if enabled */ 2152 if (fo->pcwidth > 0 || fo->bcwidth > 0) { 2153 pr_u64(bp, &cntr->pcnt, fo->pcwidth); 2154 pr_u64(bp, &cntr->bcnt, fo->bcwidth); 2155 } 2156 2157 /* Print timestamp */ 2158 if (co->do_time == TIMESTAMP_NUMERIC) 2159 bprintf(bp, "%10u ", cntr->timestamp); 2160 else if (co->do_time == TIMESTAMP_STRING) { 2161 char timestr[30]; 2162 time_t t = (time_t)0; 2163 2164 if (twidth == 0) { 2165 strcpy(timestr, ctime(&t)); 2166 *strchr(timestr, '\n') = '\0'; 2167 twidth = strlen(timestr); 2168 } 2169 if (cntr->timestamp > 0) { 2170 t = _long_to_time(cntr->timestamp); 2171 2172 strcpy(timestr, ctime(&t)); 2173 *strchr(timestr, '\n') = '\0'; 2174 bprintf(bp, "%s ", timestr); 2175 } else { 2176 bprintf(bp, "%*s", twidth, " "); 2177 } 2178 } 2179 2180 /* Print set number */ 2181 if (co->show_sets) 2182 bprintf(bp, "set %d ", rule->set); 2183 2184 /* Print the optional "match probability" */ 2185 cmd = print_opcode(bp, fo, &state, O_PROB); 2186 /* Print rule action */ 2187 for (i = 0; i < nitems(action_opcodes); i++) { 2188 cmd = print_action(bp, fo, &state, action_opcodes[i]); 2189 if (cmd == NULL) 2190 continue; 2191 /* Handle special cases */ 2192 switch (cmd->opcode) { 2193 case O_CHECK_STATE: 2194 goto end; 2195 case O_EXTERNAL_ACTION: 2196 case O_EXTERNAL_INSTANCE: 2197 /* External action can have several instructions */ 2198 continue; 2199 } 2200 break; 2201 } 2202 /* Print rule modifiers */ 2203 for (i = 0; i < nitems(modifier_opcodes); i++) 2204 print_action(bp, fo, &state, modifier_opcodes[i]); 2205 /* 2206 * Print rule body 2207 */ 2208 if (co->comment_only != 0) 2209 goto end; 2210 print_proto(bp, fo, &state); 2211 2212 /* Print source */ 2213 bprintf(bp, " from"); 2214 print_address(bp, fo, &state, src_opcodes, nitems(src_opcodes), 2215 O_IP_SRCPORT, HAVE_SRCIP); 2216 2217 /* Print destination */ 2218 bprintf(bp, " to"); 2219 print_address(bp, fo, &state, dst_opcodes, nitems(dst_opcodes), 2220 O_IP_DSTPORT, HAVE_DSTIP); 2221 2222 /* Print the rest of options */ 2223 while (print_opcode(bp, fo, &state, -1)) 2224 ; 2225 end: 2226 /* Print comment at the end */ 2227 cmd = print_opcode(bp, fo, &state, O_NOP); 2228 if (co->comment_only != 0 && cmd == NULL) 2229 bprintf(bp, " // ..."); 2230 bprintf(bp, "\n"); 2231 free_show_state(&state); 2232 } 2233 2234 static void 2235 show_dyn_state(struct cmdline_opts *co, struct format_opts *fo, 2236 struct buf_pr *bp, ipfw_dyn_rule *d) 2237 { 2238 struct protoent *pe; 2239 struct in_addr a; 2240 uint16_t rulenum; 2241 char buf[INET6_ADDRSTRLEN]; 2242 2243 if (!co->do_expired) { 2244 if (!d->expire && !(d->dyn_type == O_LIMIT_PARENT)) 2245 return; 2246 } 2247 bcopy(&d->rule, &rulenum, sizeof(rulenum)); 2248 bprintf(bp, "%05d", rulenum); 2249 if (fo->pcwidth > 0 || fo->bcwidth > 0) { 2250 bprintf(bp, " "); 2251 pr_u64(bp, &d->pcnt, fo->pcwidth); 2252 pr_u64(bp, &d->bcnt, fo->bcwidth); 2253 bprintf(bp, "(%ds)", d->expire); 2254 } 2255 switch (d->dyn_type) { 2256 case O_LIMIT_PARENT: 2257 bprintf(bp, " PARENT %d", d->count); 2258 break; 2259 case O_LIMIT: 2260 bprintf(bp, " LIMIT"); 2261 break; 2262 case O_KEEP_STATE: /* bidir, no mask */ 2263 bprintf(bp, " STATE"); 2264 break; 2265 } 2266 2267 if ((pe = getprotobynumber(d->id.proto)) != NULL) 2268 bprintf(bp, " %s", pe->p_name); 2269 else 2270 bprintf(bp, " proto %u", d->id.proto); 2271 2272 if (d->id.addr_type == 4) { 2273 a.s_addr = htonl(d->id.src_ip); 2274 bprintf(bp, " %s %d", inet_ntoa(a), d->id.src_port); 2275 2276 a.s_addr = htonl(d->id.dst_ip); 2277 bprintf(bp, " <-> %s %d", inet_ntoa(a), d->id.dst_port); 2278 } else if (d->id.addr_type == 6) { 2279 bprintf(bp, " %s %d", inet_ntop(AF_INET6, &d->id.src_ip6, buf, 2280 sizeof(buf)), d->id.src_port); 2281 bprintf(bp, " <-> %s %d", inet_ntop(AF_INET6, &d->id.dst_ip6, 2282 buf, sizeof(buf)), d->id.dst_port); 2283 } else 2284 bprintf(bp, " UNKNOWN <-> UNKNOWN"); 2285 if (d->kidx != 0) 2286 bprintf(bp, " :%s", object_search_ctlv(fo->tstate, 2287 d->kidx, IPFW_TLV_STATE_NAME)); 2288 } 2289 2290 static int 2291 do_range_cmd(int cmd, ipfw_range_tlv *rt) 2292 { 2293 ipfw_range_header rh; 2294 size_t sz; 2295 2296 memset(&rh, 0, sizeof(rh)); 2297 memcpy(&rh.range, rt, sizeof(*rt)); 2298 rh.range.head.length = sizeof(*rt); 2299 rh.range.head.type = IPFW_TLV_RANGE; 2300 sz = sizeof(rh); 2301 2302 if (do_get3(cmd, &rh.opheader, &sz) != 0) 2303 return (-1); 2304 /* Save number of matched objects */ 2305 rt->new_set = rh.range.new_set; 2306 return (0); 2307 } 2308 2309 /* 2310 * This one handles all set-related commands 2311 * ipfw set { show | enable | disable } 2312 * ipfw set swap X Y 2313 * ipfw set move X to Y 2314 * ipfw set move rule X to Y 2315 */ 2316 void 2317 ipfw_sets_handler(char *av[]) 2318 { 2319 ipfw_range_tlv rt; 2320 char *msg; 2321 size_t size; 2322 uint32_t masks[2]; 2323 int i; 2324 uint16_t rulenum; 2325 uint8_t cmd; 2326 2327 av++; 2328 memset(&rt, 0, sizeof(rt)); 2329 2330 if (av[0] == NULL) 2331 errx(EX_USAGE, "set needs command"); 2332 if (_substrcmp(*av, "show") == 0) { 2333 struct format_opts fo; 2334 ipfw_cfg_lheader *cfg; 2335 2336 memset(&fo, 0, sizeof(fo)); 2337 if (ipfw_get_config(&co, &fo, &cfg, &size) != 0) 2338 err(EX_OSERR, "requesting config failed"); 2339 2340 for (i = 0, msg = "disable"; i < RESVD_SET; i++) 2341 if ((cfg->set_mask & (1<<i)) == 0) { 2342 printf("%s %d", msg, i); 2343 msg = ""; 2344 } 2345 msg = (cfg->set_mask != (uint32_t)-1) ? " enable" : "enable"; 2346 for (i = 0; i < RESVD_SET; i++) 2347 if ((cfg->set_mask & (1<<i)) != 0) { 2348 printf("%s %d", msg, i); 2349 msg = ""; 2350 } 2351 printf("\n"); 2352 free(cfg); 2353 } else if (_substrcmp(*av, "swap") == 0) { 2354 av++; 2355 if ( av[0] == NULL || av[1] == NULL ) 2356 errx(EX_USAGE, "set swap needs 2 set numbers\n"); 2357 rt.set = atoi(av[0]); 2358 rt.new_set = atoi(av[1]); 2359 if (!isdigit(*(av[0])) || rt.set > RESVD_SET) 2360 errx(EX_DATAERR, "invalid set number %s\n", av[0]); 2361 if (!isdigit(*(av[1])) || rt.new_set > RESVD_SET) 2362 errx(EX_DATAERR, "invalid set number %s\n", av[1]); 2363 i = do_range_cmd(IP_FW_SET_SWAP, &rt); 2364 } else if (_substrcmp(*av, "move") == 0) { 2365 av++; 2366 if (av[0] && _substrcmp(*av, "rule") == 0) { 2367 rt.flags = IPFW_RCFLAG_RANGE; /* move rules to new set */ 2368 cmd = IP_FW_XMOVE; 2369 av++; 2370 } else 2371 cmd = IP_FW_SET_MOVE; /* Move set to new one */ 2372 if (av[0] == NULL || av[1] == NULL || av[2] == NULL || 2373 av[3] != NULL || _substrcmp(av[1], "to") != 0) 2374 errx(EX_USAGE, "syntax: set move [rule] X to Y\n"); 2375 rulenum = atoi(av[0]); 2376 rt.new_set = atoi(av[2]); 2377 if (cmd == IP_FW_XMOVE) { 2378 rt.start_rule = rulenum; 2379 rt.end_rule = rulenum; 2380 } else 2381 rt.set = rulenum; 2382 rt.new_set = atoi(av[2]); 2383 if (!isdigit(*(av[0])) || (cmd == 3 && rt.set > RESVD_SET) || 2384 (cmd == 2 && rt.start_rule == IPFW_DEFAULT_RULE) ) 2385 errx(EX_DATAERR, "invalid source number %s\n", av[0]); 2386 if (!isdigit(*(av[2])) || rt.new_set > RESVD_SET) 2387 errx(EX_DATAERR, "invalid dest. set %s\n", av[1]); 2388 i = do_range_cmd(cmd, &rt); 2389 if (i < 0) 2390 err(EX_OSERR, "failed to move %s", 2391 cmd == IP_FW_SET_MOVE ? "set": "rule"); 2392 } else if (_substrcmp(*av, "disable") == 0 || 2393 _substrcmp(*av, "enable") == 0 ) { 2394 int which = _substrcmp(*av, "enable") == 0 ? 1 : 0; 2395 2396 av++; 2397 masks[0] = masks[1] = 0; 2398 2399 while (av[0]) { 2400 if (isdigit(**av)) { 2401 i = atoi(*av); 2402 if (i < 0 || i > RESVD_SET) 2403 errx(EX_DATAERR, 2404 "invalid set number %d\n", i); 2405 masks[which] |= (1<<i); 2406 } else if (_substrcmp(*av, "disable") == 0) 2407 which = 0; 2408 else if (_substrcmp(*av, "enable") == 0) 2409 which = 1; 2410 else 2411 errx(EX_DATAERR, 2412 "invalid set command %s\n", *av); 2413 av++; 2414 } 2415 if ( (masks[0] & masks[1]) != 0 ) 2416 errx(EX_DATAERR, 2417 "cannot enable and disable the same set\n"); 2418 2419 rt.set = masks[0]; 2420 rt.new_set = masks[1]; 2421 i = do_range_cmd(IP_FW_SET_ENABLE, &rt); 2422 if (i) 2423 warn("set enable/disable: setsockopt(IP_FW_SET_ENABLE)"); 2424 } else 2425 errx(EX_USAGE, "invalid set command %s\n", *av); 2426 } 2427 2428 void 2429 ipfw_sysctl_handler(char *av[], int which) 2430 { 2431 av++; 2432 2433 if (av[0] == NULL) { 2434 warnx("missing keyword to enable/disable\n"); 2435 } else if (_substrcmp(*av, "firewall") == 0) { 2436 sysctlbyname("net.inet.ip.fw.enable", NULL, 0, 2437 &which, sizeof(which)); 2438 sysctlbyname("net.inet6.ip6.fw.enable", NULL, 0, 2439 &which, sizeof(which)); 2440 } else if (_substrcmp(*av, "one_pass") == 0) { 2441 sysctlbyname("net.inet.ip.fw.one_pass", NULL, 0, 2442 &which, sizeof(which)); 2443 } else if (_substrcmp(*av, "debug") == 0) { 2444 sysctlbyname("net.inet.ip.fw.debug", NULL, 0, 2445 &which, sizeof(which)); 2446 } else if (_substrcmp(*av, "verbose") == 0) { 2447 sysctlbyname("net.inet.ip.fw.verbose", NULL, 0, 2448 &which, sizeof(which)); 2449 } else if (_substrcmp(*av, "dyn_keepalive") == 0) { 2450 sysctlbyname("net.inet.ip.fw.dyn_keepalive", NULL, 0, 2451 &which, sizeof(which)); 2452 #ifndef NO_ALTQ 2453 } else if (_substrcmp(*av, "altq") == 0) { 2454 altq_set_enabled(which); 2455 #endif 2456 } else { 2457 warnx("unrecognize enable/disable keyword: %s\n", *av); 2458 } 2459 } 2460 2461 typedef void state_cb(struct cmdline_opts *co, struct format_opts *fo, 2462 void *arg, void *state); 2463 2464 static void 2465 prepare_format_dyn(struct cmdline_opts *co, struct format_opts *fo, 2466 void *arg, void *_state) 2467 { 2468 ipfw_dyn_rule *d; 2469 int width; 2470 uint8_t set; 2471 2472 d = (ipfw_dyn_rule *)_state; 2473 /* Count _ALL_ states */ 2474 fo->dcnt++; 2475 2476 if (fo->show_counters == 0) 2477 return; 2478 2479 if (co->use_set) { 2480 /* skip states from another set */ 2481 bcopy((char *)&d->rule + sizeof(uint16_t), &set, 2482 sizeof(uint8_t)); 2483 if (set != co->use_set - 1) 2484 return; 2485 } 2486 2487 width = pr_u64(NULL, &d->pcnt, 0); 2488 if (width > fo->pcwidth) 2489 fo->pcwidth = width; 2490 2491 width = pr_u64(NULL, &d->bcnt, 0); 2492 if (width > fo->bcwidth) 2493 fo->bcwidth = width; 2494 } 2495 2496 static int 2497 foreach_state(struct cmdline_opts *co, struct format_opts *fo, 2498 caddr_t base, size_t sz, state_cb dyn_bc, void *dyn_arg) 2499 { 2500 int ttype; 2501 state_cb *fptr; 2502 void *farg; 2503 ipfw_obj_tlv *tlv; 2504 ipfw_obj_ctlv *ctlv; 2505 2506 fptr = NULL; 2507 ttype = 0; 2508 2509 while (sz > 0) { 2510 ctlv = (ipfw_obj_ctlv *)base; 2511 switch (ctlv->head.type) { 2512 case IPFW_TLV_DYNSTATE_LIST: 2513 base += sizeof(*ctlv); 2514 sz -= sizeof(*ctlv); 2515 ttype = IPFW_TLV_DYN_ENT; 2516 fptr = dyn_bc; 2517 farg = dyn_arg; 2518 break; 2519 default: 2520 return (sz); 2521 } 2522 2523 while (sz > 0) { 2524 tlv = (ipfw_obj_tlv *)base; 2525 if (tlv->type != ttype) 2526 break; 2527 2528 fptr(co, fo, farg, tlv + 1); 2529 sz -= tlv->length; 2530 base += tlv->length; 2531 } 2532 } 2533 2534 return (sz); 2535 } 2536 2537 static void 2538 prepare_format_opts(struct cmdline_opts *co, struct format_opts *fo, 2539 ipfw_obj_tlv *rtlv, int rcnt, caddr_t dynbase, size_t dynsz) 2540 { 2541 int bcwidth, pcwidth, width; 2542 int n; 2543 struct ip_fw_bcounter *cntr; 2544 struct ip_fw_rule *r; 2545 2546 bcwidth = 0; 2547 pcwidth = 0; 2548 if (fo->show_counters != 0) { 2549 for (n = 0; n < rcnt; n++, 2550 rtlv = (ipfw_obj_tlv *)((caddr_t)rtlv + rtlv->length)) { 2551 cntr = (struct ip_fw_bcounter *)(rtlv + 1); 2552 r = (struct ip_fw_rule *)((caddr_t)cntr + cntr->size); 2553 /* skip rules from another set */ 2554 if (co->use_set && r->set != co->use_set - 1) 2555 continue; 2556 2557 /* packet counter */ 2558 width = pr_u64(NULL, &cntr->pcnt, 0); 2559 if (width > pcwidth) 2560 pcwidth = width; 2561 2562 /* byte counter */ 2563 width = pr_u64(NULL, &cntr->bcnt, 0); 2564 if (width > bcwidth) 2565 bcwidth = width; 2566 } 2567 } 2568 fo->bcwidth = bcwidth; 2569 fo->pcwidth = pcwidth; 2570 2571 fo->dcnt = 0; 2572 if (co->do_dynamic && dynsz > 0) 2573 foreach_state(co, fo, dynbase, dynsz, prepare_format_dyn, NULL); 2574 } 2575 2576 static int 2577 list_static_range(struct cmdline_opts *co, struct format_opts *fo, 2578 struct buf_pr *bp, ipfw_obj_tlv *rtlv, int rcnt) 2579 { 2580 int n, seen; 2581 struct ip_fw_rule *r; 2582 struct ip_fw_bcounter *cntr; 2583 int c = 0; 2584 2585 for (n = seen = 0; n < rcnt; n++, 2586 rtlv = (ipfw_obj_tlv *)((caddr_t)rtlv + rtlv->length)) { 2587 2588 if ((fo->show_counters | fo->show_time) != 0) { 2589 cntr = (struct ip_fw_bcounter *)(rtlv + 1); 2590 r = (struct ip_fw_rule *)((caddr_t)cntr + cntr->size); 2591 } else { 2592 cntr = NULL; 2593 r = (struct ip_fw_rule *)(rtlv + 1); 2594 } 2595 if (r->rulenum > fo->last) 2596 break; 2597 if (co->use_set && r->set != co->use_set - 1) 2598 continue; 2599 if (r->rulenum >= fo->first && r->rulenum <= fo->last) { 2600 show_static_rule(co, fo, bp, r, cntr); 2601 printf("%s", bp->buf); 2602 c += rtlv->length; 2603 bp_flush(bp); 2604 seen++; 2605 } 2606 } 2607 2608 return (seen); 2609 } 2610 2611 static void 2612 list_dyn_state(struct cmdline_opts *co, struct format_opts *fo, 2613 void *_arg, void *_state) 2614 { 2615 uint16_t rulenum; 2616 uint8_t set; 2617 ipfw_dyn_rule *d; 2618 struct buf_pr *bp; 2619 2620 d = (ipfw_dyn_rule *)_state; 2621 bp = (struct buf_pr *)_arg; 2622 2623 bcopy(&d->rule, &rulenum, sizeof(rulenum)); 2624 if (rulenum > fo->last) 2625 return; 2626 if (co->use_set) { 2627 bcopy((char *)&d->rule + sizeof(uint16_t), 2628 &set, sizeof(uint8_t)); 2629 if (set != co->use_set - 1) 2630 return; 2631 } 2632 if (rulenum >= fo->first) { 2633 show_dyn_state(co, fo, bp, d); 2634 printf("%s\n", bp->buf); 2635 bp_flush(bp); 2636 } 2637 } 2638 2639 static int 2640 list_dyn_range(struct cmdline_opts *co, struct format_opts *fo, 2641 struct buf_pr *bp, caddr_t base, size_t sz) 2642 { 2643 2644 sz = foreach_state(co, fo, base, sz, list_dyn_state, bp); 2645 return (sz); 2646 } 2647 2648 void 2649 ipfw_list(int ac, char *av[], int show_counters) 2650 { 2651 ipfw_cfg_lheader *cfg; 2652 struct format_opts sfo; 2653 size_t sz; 2654 int error; 2655 int lac; 2656 char **lav; 2657 uint32_t rnum; 2658 char *endptr; 2659 2660 if (co.test_only) { 2661 fprintf(stderr, "Testing only, list disabled\n"); 2662 return; 2663 } 2664 if (co.do_pipe) { 2665 dummynet_list(ac, av, show_counters); 2666 return; 2667 } 2668 2669 ac--; 2670 av++; 2671 memset(&sfo, 0, sizeof(sfo)); 2672 2673 /* Determine rule range to request */ 2674 if (ac > 0) { 2675 for (lac = ac, lav = av; lac != 0; lac--) { 2676 rnum = strtoul(*lav++, &endptr, 10); 2677 if (sfo.first == 0 || rnum < sfo.first) 2678 sfo.first = rnum; 2679 2680 if (*endptr == '-') 2681 rnum = strtoul(endptr + 1, &endptr, 10); 2682 if (sfo.last == 0 || rnum > sfo.last) 2683 sfo.last = rnum; 2684 } 2685 } 2686 2687 /* get configuraion from kernel */ 2688 cfg = NULL; 2689 sfo.show_counters = show_counters; 2690 sfo.show_time = co.do_time; 2691 sfo.flags = IPFW_CFG_GET_STATIC; 2692 if (co.do_dynamic != 0) 2693 sfo.flags |= IPFW_CFG_GET_STATES; 2694 if ((sfo.show_counters | sfo.show_time) != 0) 2695 sfo.flags |= IPFW_CFG_GET_COUNTERS; 2696 if (ipfw_get_config(&co, &sfo, &cfg, &sz) != 0) 2697 err(EX_OSERR, "retrieving config failed"); 2698 2699 error = ipfw_show_config(&co, &sfo, cfg, sz, ac, av); 2700 2701 free(cfg); 2702 2703 if (error != EX_OK) 2704 exit(error); 2705 } 2706 2707 static int 2708 ipfw_show_config(struct cmdline_opts *co, struct format_opts *fo, 2709 ipfw_cfg_lheader *cfg, size_t sz, int ac, char *av[]) 2710 { 2711 caddr_t dynbase; 2712 size_t dynsz; 2713 int rcnt; 2714 int exitval = EX_OK; 2715 int lac; 2716 char **lav; 2717 char *endptr; 2718 size_t readsz; 2719 struct buf_pr bp; 2720 ipfw_obj_ctlv *ctlv, *tstate; 2721 ipfw_obj_tlv *rbase; 2722 2723 /* 2724 * Handle tablenames TLV first, if any 2725 */ 2726 tstate = NULL; 2727 rbase = NULL; 2728 dynbase = NULL; 2729 dynsz = 0; 2730 readsz = sizeof(*cfg); 2731 rcnt = 0; 2732 2733 fo->set_mask = cfg->set_mask; 2734 2735 ctlv = (ipfw_obj_ctlv *)(cfg + 1); 2736 2737 if (cfg->flags & IPFW_CFG_GET_STATIC) { 2738 /* We've requested static rules */ 2739 if (ctlv->head.type == IPFW_TLV_TBLNAME_LIST) { 2740 object_sort_ctlv(ctlv); 2741 fo->tstate = ctlv; 2742 readsz += ctlv->head.length; 2743 ctlv = (ipfw_obj_ctlv *)((caddr_t)ctlv + 2744 ctlv->head.length); 2745 } 2746 2747 if (ctlv->head.type == IPFW_TLV_RULE_LIST) { 2748 rbase = (ipfw_obj_tlv *)(ctlv + 1); 2749 rcnt = ctlv->count; 2750 readsz += ctlv->head.length; 2751 ctlv = (ipfw_obj_ctlv *)((caddr_t)ctlv + 2752 ctlv->head.length); 2753 } 2754 } 2755 2756 if ((cfg->flags & IPFW_CFG_GET_STATES) && (readsz != sz)) { 2757 /* We may have some dynamic states */ 2758 dynsz = sz - readsz; 2759 /* Skip empty header */ 2760 if (dynsz != sizeof(ipfw_obj_ctlv)) 2761 dynbase = (caddr_t)ctlv; 2762 else 2763 dynsz = 0; 2764 } 2765 2766 prepare_format_opts(co, fo, rbase, rcnt, dynbase, dynsz); 2767 bp_alloc(&bp, 4096); 2768 2769 /* if no rule numbers were specified, list all rules */ 2770 if (ac == 0) { 2771 fo->first = 0; 2772 fo->last = IPFW_DEFAULT_RULE; 2773 list_static_range(co, fo, &bp, rbase, rcnt); 2774 2775 if (co->do_dynamic && dynsz > 0) { 2776 printf("## Dynamic rules (%d %zu):\n", fo->dcnt, dynsz); 2777 list_dyn_range(co, fo, &bp, dynbase, dynsz); 2778 } 2779 2780 bp_free(&bp); 2781 return (EX_OK); 2782 } 2783 2784 /* display specific rules requested on command line */ 2785 for (lac = ac, lav = av; lac != 0; lac--) { 2786 /* convert command line rule # */ 2787 fo->last = fo->first = strtoul(*lav++, &endptr, 10); 2788 if (*endptr == '-') 2789 fo->last = strtoul(endptr + 1, &endptr, 10); 2790 if (*endptr) { 2791 exitval = EX_USAGE; 2792 warnx("invalid rule number: %s", *(lav - 1)); 2793 continue; 2794 } 2795 2796 if (list_static_range(co, fo, &bp, rbase, rcnt) == 0) { 2797 /* give precedence to other error(s) */ 2798 if (exitval == EX_OK) 2799 exitval = EX_UNAVAILABLE; 2800 if (fo->first == fo->last) 2801 warnx("rule %u does not exist", fo->first); 2802 else 2803 warnx("no rules in range %u-%u", 2804 fo->first, fo->last); 2805 } 2806 } 2807 2808 if (co->do_dynamic && dynsz > 0) { 2809 printf("## Dynamic rules:\n"); 2810 for (lac = ac, lav = av; lac != 0; lac--) { 2811 fo->last = fo->first = strtoul(*lav++, &endptr, 10); 2812 if (*endptr == '-') 2813 fo->last = strtoul(endptr+1, &endptr, 10); 2814 if (*endptr) 2815 /* already warned */ 2816 continue; 2817 list_dyn_range(co, fo, &bp, dynbase, dynsz); 2818 } 2819 } 2820 2821 bp_free(&bp); 2822 return (exitval); 2823 } 2824 2825 2826 /* 2827 * Retrieves current ipfw configuration of given type 2828 * and stores its pointer to @pcfg. 2829 * 2830 * Caller is responsible for freeing @pcfg. 2831 * 2832 * Returns 0 on success. 2833 */ 2834 2835 static int 2836 ipfw_get_config(struct cmdline_opts *co, struct format_opts *fo, 2837 ipfw_cfg_lheader **pcfg, size_t *psize) 2838 { 2839 ipfw_cfg_lheader *cfg; 2840 size_t sz; 2841 int i; 2842 2843 2844 if (co->test_only != 0) { 2845 fprintf(stderr, "Testing only, list disabled\n"); 2846 return (0); 2847 } 2848 2849 /* Start with some data size */ 2850 sz = 4096; 2851 cfg = NULL; 2852 2853 for (i = 0; i < 16; i++) { 2854 if (cfg != NULL) 2855 free(cfg); 2856 if ((cfg = calloc(1, sz)) == NULL) 2857 return (ENOMEM); 2858 2859 cfg->flags = fo->flags; 2860 cfg->start_rule = fo->first; 2861 cfg->end_rule = fo->last; 2862 2863 if (do_get3(IP_FW_XGET, &cfg->opheader, &sz) != 0) { 2864 if (errno != ENOMEM) { 2865 free(cfg); 2866 return (errno); 2867 } 2868 2869 /* Buffer size is not enough. Try to increase */ 2870 sz = sz * 2; 2871 if (sz < cfg->size) 2872 sz = cfg->size; 2873 continue; 2874 } 2875 2876 *pcfg = cfg; 2877 *psize = sz; 2878 return (0); 2879 } 2880 2881 free(cfg); 2882 return (ENOMEM); 2883 } 2884 2885 static int 2886 lookup_host (char *host, struct in_addr *ipaddr) 2887 { 2888 struct hostent *he; 2889 2890 if (!inet_aton(host, ipaddr)) { 2891 if ((he = gethostbyname(host)) == NULL) 2892 return(-1); 2893 *ipaddr = *(struct in_addr *)he->h_addr_list[0]; 2894 } 2895 return(0); 2896 } 2897 2898 struct tidx { 2899 ipfw_obj_ntlv *idx; 2900 uint32_t count; 2901 uint32_t size; 2902 uint16_t counter; 2903 uint8_t set; 2904 }; 2905 2906 int 2907 ipfw_check_object_name(const char *name) 2908 { 2909 int c, i, l; 2910 2911 /* 2912 * Check that name is null-terminated and contains 2913 * valid symbols only. Valid mask is: 2914 * [a-zA-Z0-9\-_\.]{1,63} 2915 */ 2916 l = strlen(name); 2917 if (l == 0 || l >= 64) 2918 return (EINVAL); 2919 for (i = 0; i < l; i++) { 2920 c = name[i]; 2921 if (isalpha(c) || isdigit(c) || c == '_' || 2922 c == '-' || c == '.') 2923 continue; 2924 return (EINVAL); 2925 } 2926 return (0); 2927 } 2928 2929 static char *default_state_name = "default"; 2930 static int 2931 state_check_name(const char *name) 2932 { 2933 2934 if (ipfw_check_object_name(name) != 0) 2935 return (EINVAL); 2936 if (strcmp(name, "any") == 0) 2937 return (EINVAL); 2938 return (0); 2939 } 2940 2941 static int 2942 eaction_check_name(const char *name) 2943 { 2944 2945 if (ipfw_check_object_name(name) != 0) 2946 return (EINVAL); 2947 /* Restrict some 'special' names */ 2948 if (match_token(rule_actions, name) != -1 && 2949 match_token(rule_action_params, name) != -1) 2950 return (EINVAL); 2951 return (0); 2952 } 2953 2954 static uint16_t 2955 pack_object(struct tidx *tstate, char *name, int otype) 2956 { 2957 int i; 2958 ipfw_obj_ntlv *ntlv; 2959 2960 for (i = 0; i < tstate->count; i++) { 2961 if (strcmp(tstate->idx[i].name, name) != 0) 2962 continue; 2963 if (tstate->idx[i].set != tstate->set) 2964 continue; 2965 if (tstate->idx[i].head.type != otype) 2966 continue; 2967 2968 return (tstate->idx[i].idx); 2969 } 2970 2971 if (tstate->count + 1 > tstate->size) { 2972 tstate->size += 4; 2973 tstate->idx = realloc(tstate->idx, tstate->size * 2974 sizeof(ipfw_obj_ntlv)); 2975 if (tstate->idx == NULL) 2976 return (0); 2977 } 2978 2979 ntlv = &tstate->idx[i]; 2980 memset(ntlv, 0, sizeof(ipfw_obj_ntlv)); 2981 strlcpy(ntlv->name, name, sizeof(ntlv->name)); 2982 ntlv->head.type = otype; 2983 ntlv->head.length = sizeof(ipfw_obj_ntlv); 2984 ntlv->set = tstate->set; 2985 ntlv->idx = ++tstate->counter; 2986 tstate->count++; 2987 2988 return (ntlv->idx); 2989 } 2990 2991 static uint16_t 2992 pack_table(struct tidx *tstate, char *name) 2993 { 2994 2995 if (table_check_name(name) != 0) 2996 return (0); 2997 2998 return (pack_object(tstate, name, IPFW_TLV_TBL_NAME)); 2999 } 3000 3001 void 3002 fill_table(struct _ipfw_insn *cmd, char *av, uint8_t opcode, 3003 struct tidx *tstate) 3004 { 3005 uint32_t *d = ((ipfw_insn_u32 *)cmd)->d; 3006 uint16_t uidx; 3007 char *p; 3008 3009 if ((p = strchr(av + 6, ')')) == NULL) 3010 errx(EX_DATAERR, "forgotten parenthesis: '%s'", av); 3011 *p = '\0'; 3012 p = strchr(av + 6, ','); 3013 if (p) 3014 *p++ = '\0'; 3015 3016 if ((uidx = pack_table(tstate, av + 6)) == 0) 3017 errx(EX_DATAERR, "Invalid table name: %s", av + 6); 3018 3019 cmd->opcode = opcode; 3020 cmd->arg1 = uidx; 3021 if (p) { 3022 cmd->len |= F_INSN_SIZE(ipfw_insn_u32); 3023 d[0] = strtoul(p, NULL, 0); 3024 } else 3025 cmd->len |= F_INSN_SIZE(ipfw_insn); 3026 } 3027 3028 3029 /* 3030 * fills the addr and mask fields in the instruction as appropriate from av. 3031 * Update length as appropriate. 3032 * The following formats are allowed: 3033 * me returns O_IP_*_ME 3034 * 1.2.3.4 single IP address 3035 * 1.2.3.4:5.6.7.8 address:mask 3036 * 1.2.3.4/24 address/mask 3037 * 1.2.3.4/26{1,6,5,4,23} set of addresses in a subnet 3038 * We can have multiple comma-separated address/mask entries. 3039 */ 3040 static void 3041 fill_ip(ipfw_insn_ip *cmd, char *av, int cblen, struct tidx *tstate) 3042 { 3043 int len = 0; 3044 uint32_t *d = ((ipfw_insn_u32 *)cmd)->d; 3045 3046 cmd->o.len &= ~F_LEN_MASK; /* zero len */ 3047 3048 if (_substrcmp(av, "any") == 0) 3049 return; 3050 3051 if (_substrcmp(av, "me") == 0) { 3052 cmd->o.len |= F_INSN_SIZE(ipfw_insn); 3053 return; 3054 } 3055 3056 if (strncmp(av, "table(", 6) == 0) { 3057 fill_table(&cmd->o, av, O_IP_DST_LOOKUP, tstate); 3058 return; 3059 } 3060 3061 while (av) { 3062 /* 3063 * After the address we can have '/' or ':' indicating a mask, 3064 * ',' indicating another address follows, '{' indicating a 3065 * set of addresses of unspecified size. 3066 */ 3067 char *t = NULL, *p = strpbrk(av, "/:,{"); 3068 int masklen; 3069 char md, nd = '\0'; 3070 3071 CHECK_LENGTH(cblen, F_INSN_SIZE(ipfw_insn) + 2 + len); 3072 3073 if (p) { 3074 md = *p; 3075 *p++ = '\0'; 3076 if ((t = strpbrk(p, ",{")) != NULL) { 3077 nd = *t; 3078 *t = '\0'; 3079 } 3080 } else 3081 md = '\0'; 3082 3083 if (lookup_host(av, (struct in_addr *)&d[0]) != 0) 3084 errx(EX_NOHOST, "hostname ``%s'' unknown", av); 3085 switch (md) { 3086 case ':': 3087 if (!inet_aton(p, (struct in_addr *)&d[1])) 3088 errx(EX_DATAERR, "bad netmask ``%s''", p); 3089 break; 3090 case '/': 3091 masklen = atoi(p); 3092 if (masklen == 0) 3093 d[1] = htonl(0U); /* mask */ 3094 else if (masklen > 32) 3095 errx(EX_DATAERR, "bad width ``%s''", p); 3096 else 3097 d[1] = htonl(~0U << (32 - masklen)); 3098 break; 3099 case '{': /* no mask, assume /24 and put back the '{' */ 3100 d[1] = htonl(~0U << (32 - 24)); 3101 *(--p) = md; 3102 break; 3103 3104 case ',': /* single address plus continuation */ 3105 *(--p) = md; 3106 /* FALLTHROUGH */ 3107 case 0: /* initialization value */ 3108 default: 3109 d[1] = htonl(~0U); /* force /32 */ 3110 break; 3111 } 3112 d[0] &= d[1]; /* mask base address with mask */ 3113 if (t) 3114 *t = nd; 3115 /* find next separator */ 3116 if (p) 3117 p = strpbrk(p, ",{"); 3118 if (p && *p == '{') { 3119 /* 3120 * We have a set of addresses. They are stored as follows: 3121 * arg1 is the set size (powers of 2, 2..256) 3122 * addr is the base address IN HOST FORMAT 3123 * mask.. is an array of arg1 bits (rounded up to 3124 * the next multiple of 32) with bits set 3125 * for each host in the map. 3126 */ 3127 uint32_t *map = (uint32_t *)&cmd->mask; 3128 int low, high; 3129 int i = contigmask((uint8_t *)&(d[1]), 32); 3130 3131 if (len > 0) 3132 errx(EX_DATAERR, "address set cannot be in a list"); 3133 if (i < 24 || i > 31) 3134 errx(EX_DATAERR, "invalid set with mask %d\n", i); 3135 cmd->o.arg1 = 1<<(32-i); /* map length */ 3136 d[0] = ntohl(d[0]); /* base addr in host format */ 3137 cmd->o.opcode = O_IP_DST_SET; /* default */ 3138 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32) + (cmd->o.arg1+31)/32; 3139 for (i = 0; i < (cmd->o.arg1+31)/32 ; i++) 3140 map[i] = 0; /* clear map */ 3141 3142 av = p + 1; 3143 low = d[0] & 0xff; 3144 high = low + cmd->o.arg1 - 1; 3145 /* 3146 * Here, i stores the previous value when we specify a range 3147 * of addresses within a mask, e.g. 45-63. i = -1 means we 3148 * have no previous value. 3149 */ 3150 i = -1; /* previous value in a range */ 3151 while (isdigit(*av)) { 3152 char *s; 3153 int a = strtol(av, &s, 0); 3154 3155 if (s == av) { /* no parameter */ 3156 if (*av != '}') 3157 errx(EX_DATAERR, "set not closed\n"); 3158 if (i != -1) 3159 errx(EX_DATAERR, "incomplete range %d-", i); 3160 break; 3161 } 3162 if (a < low || a > high) 3163 errx(EX_DATAERR, "addr %d out of range [%d-%d]\n", 3164 a, low, high); 3165 a -= low; 3166 if (i == -1) /* no previous in range */ 3167 i = a; 3168 else { /* check that range is valid */ 3169 if (i > a) 3170 errx(EX_DATAERR, "invalid range %d-%d", 3171 i+low, a+low); 3172 if (*s == '-') 3173 errx(EX_DATAERR, "double '-' in range"); 3174 } 3175 for (; i <= a; i++) 3176 map[i/32] |= 1<<(i & 31); 3177 i = -1; 3178 if (*s == '-') 3179 i = a; 3180 else if (*s == '}') 3181 break; 3182 av = s+1; 3183 } 3184 return; 3185 } 3186 av = p; 3187 if (av) /* then *av must be a ',' */ 3188 av++; 3189 3190 /* Check this entry */ 3191 if (d[1] == 0) { /* "any", specified as x.x.x.x/0 */ 3192 /* 3193 * 'any' turns the entire list into a NOP. 3194 * 'not any' never matches, so it is removed from the 3195 * list unless it is the only item, in which case we 3196 * report an error. 3197 */ 3198 if (cmd->o.len & F_NOT) { /* "not any" never matches */ 3199 if (av == NULL && len == 0) /* only this entry */ 3200 errx(EX_DATAERR, "not any never matches"); 3201 } 3202 /* else do nothing and skip this entry */ 3203 return; 3204 } 3205 /* A single IP can be stored in an optimized format */ 3206 if (d[1] == (uint32_t)~0 && av == NULL && len == 0) { 3207 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32); 3208 return; 3209 } 3210 len += 2; /* two words... */ 3211 d += 2; 3212 } /* end while */ 3213 if (len + 1 > F_LEN_MASK) 3214 errx(EX_DATAERR, "address list too long"); 3215 cmd->o.len |= len+1; 3216 } 3217 3218 3219 /* n2mask sets n bits of the mask */ 3220 void 3221 n2mask(struct in6_addr *mask, int n) 3222 { 3223 static int minimask[9] = 3224 { 0x00, 0x80, 0xc0, 0xe0, 0xf0, 0xf8, 0xfc, 0xfe, 0xff }; 3225 u_char *p; 3226 3227 memset(mask, 0, sizeof(struct in6_addr)); 3228 p = (u_char *) mask; 3229 for (; n > 0; p++, n -= 8) { 3230 if (n >= 8) 3231 *p = 0xff; 3232 else 3233 *p = minimask[n]; 3234 } 3235 return; 3236 } 3237 3238 static void 3239 fill_flags_cmd(ipfw_insn *cmd, enum ipfw_opcodes opcode, 3240 struct _s_x *flags, char *p) 3241 { 3242 char *e; 3243 uint32_t set = 0, clear = 0; 3244 3245 if (fill_flags(flags, p, &e, &set, &clear) != 0) 3246 errx(EX_DATAERR, "invalid flag %s", e); 3247 3248 cmd->opcode = opcode; 3249 cmd->len = (cmd->len & (F_NOT | F_OR)) | 1; 3250 cmd->arg1 = (set & 0xff) | ( (clear & 0xff) << 8); 3251 } 3252 3253 3254 void 3255 ipfw_delete(char *av[]) 3256 { 3257 ipfw_range_tlv rt; 3258 char *sep; 3259 int i, j; 3260 int exitval = EX_OK; 3261 int do_set = 0; 3262 3263 av++; 3264 NEED1("missing rule specification"); 3265 if ( *av && _substrcmp(*av, "set") == 0) { 3266 /* Do not allow using the following syntax: 3267 * ipfw set N delete set M 3268 */ 3269 if (co.use_set) 3270 errx(EX_DATAERR, "invalid syntax"); 3271 do_set = 1; /* delete set */ 3272 av++; 3273 } 3274 3275 /* Rule number */ 3276 while (*av && isdigit(**av)) { 3277 i = strtol(*av, &sep, 10); 3278 j = i; 3279 if (*sep== '-') 3280 j = strtol(sep + 1, NULL, 10); 3281 av++; 3282 if (co.do_nat) { 3283 exitval = do_cmd(IP_FW_NAT_DEL, &i, sizeof i); 3284 if (exitval) { 3285 exitval = EX_UNAVAILABLE; 3286 if (co.do_quiet) 3287 continue; 3288 warn("nat %u not available", i); 3289 } 3290 } else if (co.do_pipe) { 3291 exitval = ipfw_delete_pipe(co.do_pipe, i); 3292 } else { 3293 memset(&rt, 0, sizeof(rt)); 3294 if (do_set != 0) { 3295 rt.set = i & 31; 3296 rt.flags = IPFW_RCFLAG_SET; 3297 } else { 3298 rt.start_rule = i & 0xffff; 3299 rt.end_rule = j & 0xffff; 3300 if (rt.start_rule == 0 && rt.end_rule == 0) 3301 rt.flags |= IPFW_RCFLAG_ALL; 3302 else 3303 rt.flags |= IPFW_RCFLAG_RANGE; 3304 if (co.use_set != 0) { 3305 rt.set = co.use_set - 1; 3306 rt.flags |= IPFW_RCFLAG_SET; 3307 } 3308 } 3309 i = do_range_cmd(IP_FW_XDEL, &rt); 3310 if (i != 0) { 3311 exitval = EX_UNAVAILABLE; 3312 if (co.do_quiet) 3313 continue; 3314 warn("rule %u: setsockopt(IP_FW_XDEL)", 3315 rt.start_rule); 3316 } else if (rt.new_set == 0 && do_set == 0) { 3317 exitval = EX_UNAVAILABLE; 3318 if (co.do_quiet) 3319 continue; 3320 if (rt.start_rule != rt.end_rule) 3321 warnx("no rules rules in %u-%u range", 3322 rt.start_rule, rt.end_rule); 3323 else 3324 warnx("rule %u not found", 3325 rt.start_rule); 3326 } 3327 } 3328 } 3329 if (exitval != EX_OK && co.do_force == 0) 3330 exit(exitval); 3331 } 3332 3333 3334 /* 3335 * fill the interface structure. We do not check the name as we can 3336 * create interfaces dynamically, so checking them at insert time 3337 * makes relatively little sense. 3338 * Interface names containing '*', '?', or '[' are assumed to be shell 3339 * patterns which match interfaces. 3340 */ 3341 static void 3342 fill_iface(ipfw_insn_if *cmd, char *arg, int cblen, struct tidx *tstate) 3343 { 3344 char *p; 3345 uint16_t uidx; 3346 3347 cmd->name[0] = '\0'; 3348 cmd->o.len |= F_INSN_SIZE(ipfw_insn_if); 3349 3350 CHECK_CMDLEN; 3351 3352 /* Parse the interface or address */ 3353 if (strcmp(arg, "any") == 0) 3354 cmd->o.len = 0; /* effectively ignore this command */ 3355 else if (strncmp(arg, "table(", 6) == 0) { 3356 if ((p = strchr(arg + 6, ')')) == NULL) 3357 errx(EX_DATAERR, "forgotten parenthesis: '%s'", arg); 3358 *p = '\0'; 3359 p = strchr(arg + 6, ','); 3360 if (p) 3361 *p++ = '\0'; 3362 if ((uidx = pack_table(tstate, arg + 6)) == 0) 3363 errx(EX_DATAERR, "Invalid table name: %s", arg + 6); 3364 3365 cmd->name[0] = '\1'; /* Special value indicating table */ 3366 cmd->p.kidx = uidx; 3367 } else if (!isdigit(*arg)) { 3368 strlcpy(cmd->name, arg, sizeof(cmd->name)); 3369 cmd->p.glob = strpbrk(arg, "*?[") != NULL ? 1 : 0; 3370 } else if (!inet_aton(arg, &cmd->p.ip)) 3371 errx(EX_DATAERR, "bad ip address ``%s''", arg); 3372 } 3373 3374 static void 3375 get_mac_addr_mask(const char *p, uint8_t *addr, uint8_t *mask) 3376 { 3377 int i; 3378 size_t l; 3379 char *ap, *ptr, *optr; 3380 struct ether_addr *mac; 3381 const char *macset = "0123456789abcdefABCDEF:"; 3382 3383 if (strcmp(p, "any") == 0) { 3384 for (i = 0; i < ETHER_ADDR_LEN; i++) 3385 addr[i] = mask[i] = 0; 3386 return; 3387 } 3388 3389 optr = ptr = strdup(p); 3390 if ((ap = strsep(&ptr, "&/")) != NULL && *ap != 0) { 3391 l = strlen(ap); 3392 if (strspn(ap, macset) != l || (mac = ether_aton(ap)) == NULL) 3393 errx(EX_DATAERR, "Incorrect MAC address"); 3394 bcopy(mac, addr, ETHER_ADDR_LEN); 3395 } else 3396 errx(EX_DATAERR, "Incorrect MAC address"); 3397 3398 if (ptr != NULL) { /* we have mask? */ 3399 if (p[ptr - optr - 1] == '/') { /* mask len */ 3400 long ml = strtol(ptr, &ap, 10); 3401 if (*ap != 0 || ml > ETHER_ADDR_LEN * 8 || ml < 0) 3402 errx(EX_DATAERR, "Incorrect mask length"); 3403 for (i = 0; ml > 0 && i < ETHER_ADDR_LEN; ml -= 8, i++) 3404 mask[i] = (ml >= 8) ? 0xff: (~0) << (8 - ml); 3405 } else { /* mask */ 3406 l = strlen(ptr); 3407 if (strspn(ptr, macset) != l || 3408 (mac = ether_aton(ptr)) == NULL) 3409 errx(EX_DATAERR, "Incorrect mask"); 3410 bcopy(mac, mask, ETHER_ADDR_LEN); 3411 } 3412 } else { /* default mask: ff:ff:ff:ff:ff:ff */ 3413 for (i = 0; i < ETHER_ADDR_LEN; i++) 3414 mask[i] = 0xff; 3415 } 3416 for (i = 0; i < ETHER_ADDR_LEN; i++) 3417 addr[i] &= mask[i]; 3418 3419 free(optr); 3420 } 3421 3422 /* 3423 * helper function, updates the pointer to cmd with the length 3424 * of the current command, and also cleans up the first word of 3425 * the new command in case it has been clobbered before. 3426 */ 3427 static ipfw_insn * 3428 next_cmd(ipfw_insn *cmd, int *len) 3429 { 3430 *len -= F_LEN(cmd); 3431 CHECK_LENGTH(*len, 0); 3432 cmd += F_LEN(cmd); 3433 bzero(cmd, sizeof(*cmd)); 3434 return cmd; 3435 } 3436 3437 /* 3438 * Takes arguments and copies them into a comment 3439 */ 3440 static void 3441 fill_comment(ipfw_insn *cmd, char **av, int cblen) 3442 { 3443 int i, l; 3444 char *p = (char *)(cmd + 1); 3445 3446 cmd->opcode = O_NOP; 3447 cmd->len = (cmd->len & (F_NOT | F_OR)); 3448 3449 /* Compute length of comment string. */ 3450 for (i = 0, l = 0; av[i] != NULL; i++) 3451 l += strlen(av[i]) + 1; 3452 if (l == 0) 3453 return; 3454 if (l > 84) 3455 errx(EX_DATAERR, 3456 "comment too long (max 80 chars)"); 3457 l = 1 + (l+3)/4; 3458 cmd->len = (cmd->len & (F_NOT | F_OR)) | l; 3459 CHECK_CMDLEN; 3460 3461 for (i = 0; av[i] != NULL; i++) { 3462 strcpy(p, av[i]); 3463 p += strlen(av[i]); 3464 *p++ = ' '; 3465 } 3466 *(--p) = '\0'; 3467 } 3468 3469 /* 3470 * A function to fill simple commands of size 1. 3471 * Existing flags are preserved. 3472 */ 3473 static void 3474 fill_cmd(ipfw_insn *cmd, enum ipfw_opcodes opcode, int flags, uint16_t arg) 3475 { 3476 cmd->opcode = opcode; 3477 cmd->len = ((cmd->len | flags) & (F_NOT | F_OR)) | 1; 3478 cmd->arg1 = arg; 3479 } 3480 3481 /* 3482 * Fetch and add the MAC address and type, with masks. This generates one or 3483 * two microinstructions, and returns the pointer to the last one. 3484 */ 3485 static ipfw_insn * 3486 add_mac(ipfw_insn *cmd, char *av[], int cblen) 3487 { 3488 ipfw_insn_mac *mac; 3489 3490 if ( ( av[0] == NULL ) || ( av[1] == NULL ) ) 3491 errx(EX_DATAERR, "MAC dst src"); 3492 3493 cmd->opcode = O_MACADDR2; 3494 cmd->len = (cmd->len & (F_NOT | F_OR)) | F_INSN_SIZE(ipfw_insn_mac); 3495 CHECK_CMDLEN; 3496 3497 mac = (ipfw_insn_mac *)cmd; 3498 get_mac_addr_mask(av[0], mac->addr, mac->mask); /* dst */ 3499 get_mac_addr_mask(av[1], &(mac->addr[ETHER_ADDR_LEN]), 3500 &(mac->mask[ETHER_ADDR_LEN])); /* src */ 3501 return cmd; 3502 } 3503 3504 static ipfw_insn * 3505 add_mactype(ipfw_insn *cmd, char *av, int cblen) 3506 { 3507 if (!av) 3508 errx(EX_DATAERR, "missing MAC type"); 3509 if (strcmp(av, "any") != 0) { /* we have a non-null type */ 3510 fill_newports((ipfw_insn_u16 *)cmd, av, IPPROTO_ETHERTYPE, 3511 cblen); 3512 cmd->opcode = O_MAC_TYPE; 3513 return cmd; 3514 } else 3515 return NULL; 3516 } 3517 3518 static ipfw_insn * 3519 add_proto0(ipfw_insn *cmd, char *av, u_char *protop) 3520 { 3521 struct protoent *pe; 3522 char *ep; 3523 int proto; 3524 3525 proto = strtol(av, &ep, 10); 3526 if (*ep != '\0' || proto <= 0) { 3527 if ((pe = getprotobyname(av)) == NULL) 3528 return NULL; 3529 proto = pe->p_proto; 3530 } 3531 3532 fill_cmd(cmd, O_PROTO, 0, proto); 3533 *protop = proto; 3534 return cmd; 3535 } 3536 3537 static ipfw_insn * 3538 add_proto(ipfw_insn *cmd, char *av, u_char *protop) 3539 { 3540 u_char proto = IPPROTO_IP; 3541 3542 if (_substrcmp(av, "all") == 0 || strcmp(av, "ip") == 0) 3543 ; /* do not set O_IP4 nor O_IP6 */ 3544 else if (strcmp(av, "ip4") == 0) 3545 /* explicit "just IPv4" rule */ 3546 fill_cmd(cmd, O_IP4, 0, 0); 3547 else if (strcmp(av, "ip6") == 0) { 3548 /* explicit "just IPv6" rule */ 3549 proto = IPPROTO_IPV6; 3550 fill_cmd(cmd, O_IP6, 0, 0); 3551 } else 3552 return add_proto0(cmd, av, protop); 3553 3554 *protop = proto; 3555 return cmd; 3556 } 3557 3558 static ipfw_insn * 3559 add_proto_compat(ipfw_insn *cmd, char *av, u_char *protop) 3560 { 3561 u_char proto = IPPROTO_IP; 3562 3563 if (_substrcmp(av, "all") == 0 || strcmp(av, "ip") == 0) 3564 ; /* do not set O_IP4 nor O_IP6 */ 3565 else if (strcmp(av, "ipv4") == 0 || strcmp(av, "ip4") == 0) 3566 /* explicit "just IPv4" rule */ 3567 fill_cmd(cmd, O_IP4, 0, 0); 3568 else if (strcmp(av, "ipv6") == 0 || strcmp(av, "ip6") == 0) { 3569 /* explicit "just IPv6" rule */ 3570 proto = IPPROTO_IPV6; 3571 fill_cmd(cmd, O_IP6, 0, 0); 3572 } else 3573 return add_proto0(cmd, av, protop); 3574 3575 *protop = proto; 3576 return cmd; 3577 } 3578 3579 static ipfw_insn * 3580 add_srcip(ipfw_insn *cmd, char *av, int cblen, struct tidx *tstate) 3581 { 3582 fill_ip((ipfw_insn_ip *)cmd, av, cblen, tstate); 3583 if (cmd->opcode == O_IP_DST_SET) /* set */ 3584 cmd->opcode = O_IP_SRC_SET; 3585 else if (cmd->opcode == O_IP_DST_LOOKUP) /* table */ 3586 cmd->opcode = O_IP_SRC_LOOKUP; 3587 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn)) /* me */ 3588 cmd->opcode = O_IP_SRC_ME; 3589 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_u32)) /* one IP */ 3590 cmd->opcode = O_IP_SRC; 3591 else /* addr/mask */ 3592 cmd->opcode = O_IP_SRC_MASK; 3593 return cmd; 3594 } 3595 3596 static ipfw_insn * 3597 add_dstip(ipfw_insn *cmd, char *av, int cblen, struct tidx *tstate) 3598 { 3599 fill_ip((ipfw_insn_ip *)cmd, av, cblen, tstate); 3600 if (cmd->opcode == O_IP_DST_SET) /* set */ 3601 ; 3602 else if (cmd->opcode == O_IP_DST_LOOKUP) /* table */ 3603 ; 3604 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn)) /* me */ 3605 cmd->opcode = O_IP_DST_ME; 3606 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_u32)) /* one IP */ 3607 cmd->opcode = O_IP_DST; 3608 else /* addr/mask */ 3609 cmd->opcode = O_IP_DST_MASK; 3610 return cmd; 3611 } 3612 3613 static struct _s_x f_reserved_keywords[] = { 3614 { "altq", TOK_OR }, 3615 { "//", TOK_OR }, 3616 { "diverted", TOK_OR }, 3617 { "dst-port", TOK_OR }, 3618 { "src-port", TOK_OR }, 3619 { "established", TOK_OR }, 3620 { "keep-state", TOK_OR }, 3621 { "frag", TOK_OR }, 3622 { "icmptypes", TOK_OR }, 3623 { "in", TOK_OR }, 3624 { "out", TOK_OR }, 3625 { "ip6", TOK_OR }, 3626 { "any", TOK_OR }, 3627 { "to", TOK_OR }, 3628 { "via", TOK_OR }, 3629 { "{", TOK_OR }, 3630 { NULL, 0 } /* terminator */ 3631 }; 3632 3633 static ipfw_insn * 3634 add_ports(ipfw_insn *cmd, char *av, u_char proto, int opcode, int cblen) 3635 { 3636 3637 if (match_token(f_reserved_keywords, av) != -1) 3638 return (NULL); 3639 3640 if (fill_newports((ipfw_insn_u16 *)cmd, av, proto, cblen)) { 3641 /* XXX todo: check that we have a protocol with ports */ 3642 cmd->opcode = opcode; 3643 return cmd; 3644 } 3645 return NULL; 3646 } 3647 3648 static ipfw_insn * 3649 add_src(ipfw_insn *cmd, char *av, u_char proto, int cblen, struct tidx *tstate) 3650 { 3651 struct in6_addr a; 3652 char *host, *ch, buf[INET6_ADDRSTRLEN]; 3653 ipfw_insn *ret = NULL; 3654 int len; 3655 3656 /* Copy first address in set if needed */ 3657 if ((ch = strpbrk(av, "/,")) != NULL) { 3658 len = ch - av; 3659 strlcpy(buf, av, sizeof(buf)); 3660 if (len < sizeof(buf)) 3661 buf[len] = '\0'; 3662 host = buf; 3663 } else 3664 host = av; 3665 3666 if (proto == IPPROTO_IPV6 || strcmp(av, "me6") == 0 || 3667 inet_pton(AF_INET6, host, &a) == 1) 3668 ret = add_srcip6(cmd, av, cblen, tstate); 3669 /* XXX: should check for IPv4, not !IPv6 */ 3670 if (ret == NULL && (proto == IPPROTO_IP || strcmp(av, "me") == 0 || 3671 inet_pton(AF_INET6, host, &a) != 1)) 3672 ret = add_srcip(cmd, av, cblen, tstate); 3673 if (ret == NULL && strcmp(av, "any") != 0) 3674 ret = cmd; 3675 3676 return ret; 3677 } 3678 3679 static ipfw_insn * 3680 add_dst(ipfw_insn *cmd, char *av, u_char proto, int cblen, struct tidx *tstate) 3681 { 3682 struct in6_addr a; 3683 char *host, *ch, buf[INET6_ADDRSTRLEN]; 3684 ipfw_insn *ret = NULL; 3685 int len; 3686 3687 /* Copy first address in set if needed */ 3688 if ((ch = strpbrk(av, "/,")) != NULL) { 3689 len = ch - av; 3690 strlcpy(buf, av, sizeof(buf)); 3691 if (len < sizeof(buf)) 3692 buf[len] = '\0'; 3693 host = buf; 3694 } else 3695 host = av; 3696 3697 if (proto == IPPROTO_IPV6 || strcmp(av, "me6") == 0 || 3698 inet_pton(AF_INET6, host, &a) == 1) 3699 ret = add_dstip6(cmd, av, cblen, tstate); 3700 /* XXX: should check for IPv4, not !IPv6 */ 3701 if (ret == NULL && (proto == IPPROTO_IP || strcmp(av, "me") == 0 || 3702 inet_pton(AF_INET6, host, &a) != 1)) 3703 ret = add_dstip(cmd, av, cblen, tstate); 3704 if (ret == NULL && strcmp(av, "any") != 0) 3705 ret = cmd; 3706 3707 return ret; 3708 } 3709 3710 /* 3711 * Parse arguments and assemble the microinstructions which make up a rule. 3712 * Rules are added into the 'rulebuf' and then copied in the correct order 3713 * into the actual rule. 3714 * 3715 * The syntax for a rule starts with the action, followed by 3716 * optional action parameters, and the various match patterns. 3717 * In the assembled microcode, the first opcode must be an O_PROBE_STATE 3718 * (generated if the rule includes a keep-state option), then the 3719 * various match patterns, log/altq actions, and the actual action. 3720 * 3721 */ 3722 void 3723 compile_rule(char *av[], uint32_t *rbuf, int *rbufsize, struct tidx *tstate) 3724 { 3725 /* 3726 * rules are added into the 'rulebuf' and then copied in 3727 * the correct order into the actual rule. 3728 * Some things that need to go out of order (prob, action etc.) 3729 * go into actbuf[]. 3730 */ 3731 static uint32_t actbuf[255], cmdbuf[255]; 3732 int rblen, ablen, cblen; 3733 3734 ipfw_insn *src, *dst, *cmd, *action, *prev=NULL; 3735 ipfw_insn *first_cmd; /* first match pattern */ 3736 3737 struct ip_fw_rule *rule; 3738 3739 /* 3740 * various flags used to record that we entered some fields. 3741 */ 3742 ipfw_insn *have_state = NULL; /* any state-related option */ 3743 int have_rstate = 0; 3744 ipfw_insn *have_log = NULL, *have_altq = NULL, *have_tag = NULL; 3745 ipfw_insn *have_skipcmd = NULL; 3746 size_t len; 3747 3748 int i; 3749 3750 int open_par = 0; /* open parenthesis ( */ 3751 3752 /* proto is here because it is used to fetch ports */ 3753 u_char proto = IPPROTO_IP; /* default protocol */ 3754 3755 double match_prob = 1; /* match probability, default is always match */ 3756 3757 bzero(actbuf, sizeof(actbuf)); /* actions go here */ 3758 bzero(cmdbuf, sizeof(cmdbuf)); 3759 bzero(rbuf, *rbufsize); 3760 3761 rule = (struct ip_fw_rule *)rbuf; 3762 cmd = (ipfw_insn *)cmdbuf; 3763 action = (ipfw_insn *)actbuf; 3764 3765 rblen = *rbufsize / sizeof(uint32_t); 3766 rblen -= sizeof(struct ip_fw_rule) / sizeof(uint32_t); 3767 ablen = sizeof(actbuf) / sizeof(actbuf[0]); 3768 cblen = sizeof(cmdbuf) / sizeof(cmdbuf[0]); 3769 cblen -= F_INSN_SIZE(ipfw_insn_u32) + 1; 3770 3771 #define CHECK_RBUFLEN(len) { CHECK_LENGTH(rblen, len); rblen -= len; } 3772 #define CHECK_ACTLEN CHECK_LENGTH(ablen, action->len) 3773 3774 av++; 3775 3776 /* [rule N] -- Rule number optional */ 3777 if (av[0] && isdigit(**av)) { 3778 rule->rulenum = atoi(*av); 3779 av++; 3780 } 3781 3782 /* [set N] -- set number (0..RESVD_SET), optional */ 3783 if (av[0] && av[1] && _substrcmp(*av, "set") == 0) { 3784 int set = strtoul(av[1], NULL, 10); 3785 if (set < 0 || set > RESVD_SET) 3786 errx(EX_DATAERR, "illegal set %s", av[1]); 3787 rule->set = set; 3788 tstate->set = set; 3789 av += 2; 3790 } 3791 3792 /* [prob D] -- match probability, optional */ 3793 if (av[0] && av[1] && _substrcmp(*av, "prob") == 0) { 3794 match_prob = strtod(av[1], NULL); 3795 3796 if (match_prob <= 0 || match_prob > 1) 3797 errx(EX_DATAERR, "illegal match prob. %s", av[1]); 3798 av += 2; 3799 } 3800 3801 /* action -- mandatory */ 3802 NEED1("missing action"); 3803 i = match_token(rule_actions, *av); 3804 av++; 3805 action->len = 1; /* default */ 3806 CHECK_ACTLEN; 3807 switch(i) { 3808 case TOK_CHECKSTATE: 3809 have_state = action; 3810 action->opcode = O_CHECK_STATE; 3811 if (*av == NULL || 3812 match_token(rule_options, *av) == TOK_COMMENT) { 3813 action->arg1 = pack_object(tstate, 3814 default_state_name, IPFW_TLV_STATE_NAME); 3815 break; 3816 } 3817 if (*av[0] == ':') { 3818 if (strcmp(*av + 1, "any") == 0) 3819 action->arg1 = 0; 3820 else if (state_check_name(*av + 1) == 0) 3821 action->arg1 = pack_object(tstate, *av + 1, 3822 IPFW_TLV_STATE_NAME); 3823 else 3824 errx(EX_DATAERR, "Invalid state name %s", 3825 *av); 3826 av++; 3827 break; 3828 } 3829 errx(EX_DATAERR, "Invalid state name %s", *av); 3830 break; 3831 3832 case TOK_ABORT: 3833 action->opcode = O_REJECT; 3834 action->arg1 = ICMP_REJECT_ABORT; 3835 break; 3836 3837 case TOK_ABORT6: 3838 action->opcode = O_UNREACH6; 3839 action->arg1 = ICMP6_UNREACH_ABORT; 3840 break; 3841 3842 case TOK_ACCEPT: 3843 action->opcode = O_ACCEPT; 3844 break; 3845 3846 case TOK_DENY: 3847 action->opcode = O_DENY; 3848 action->arg1 = 0; 3849 break; 3850 3851 case TOK_REJECT: 3852 action->opcode = O_REJECT; 3853 action->arg1 = ICMP_UNREACH_HOST; 3854 break; 3855 3856 case TOK_RESET: 3857 action->opcode = O_REJECT; 3858 action->arg1 = ICMP_REJECT_RST; 3859 break; 3860 3861 case TOK_RESET6: 3862 action->opcode = O_UNREACH6; 3863 action->arg1 = ICMP6_UNREACH_RST; 3864 break; 3865 3866 case TOK_UNREACH: 3867 action->opcode = O_REJECT; 3868 NEED1("missing reject code"); 3869 fill_reject_code(&action->arg1, *av); 3870 av++; 3871 break; 3872 3873 case TOK_UNREACH6: 3874 action->opcode = O_UNREACH6; 3875 NEED1("missing unreach code"); 3876 fill_unreach6_code(&action->arg1, *av); 3877 av++; 3878 break; 3879 3880 case TOK_COUNT: 3881 action->opcode = O_COUNT; 3882 break; 3883 3884 case TOK_NAT: 3885 action->opcode = O_NAT; 3886 action->len = F_INSN_SIZE(ipfw_insn_nat); 3887 CHECK_ACTLEN; 3888 if (*av != NULL && _substrcmp(*av, "global") == 0) { 3889 action->arg1 = IP_FW_NAT44_GLOBAL; 3890 av++; 3891 break; 3892 } else 3893 goto chkarg; 3894 case TOK_QUEUE: 3895 action->opcode = O_QUEUE; 3896 goto chkarg; 3897 case TOK_PIPE: 3898 action->opcode = O_PIPE; 3899 goto chkarg; 3900 case TOK_SKIPTO: 3901 action->opcode = O_SKIPTO; 3902 goto chkarg; 3903 case TOK_NETGRAPH: 3904 action->opcode = O_NETGRAPH; 3905 goto chkarg; 3906 case TOK_NGTEE: 3907 action->opcode = O_NGTEE; 3908 goto chkarg; 3909 case TOK_DIVERT: 3910 action->opcode = O_DIVERT; 3911 goto chkarg; 3912 case TOK_TEE: 3913 action->opcode = O_TEE; 3914 goto chkarg; 3915 case TOK_CALL: 3916 action->opcode = O_CALLRETURN; 3917 chkarg: 3918 if (!av[0]) 3919 errx(EX_USAGE, "missing argument for %s", *(av - 1)); 3920 if (isdigit(**av)) { 3921 action->arg1 = strtoul(*av, NULL, 10); 3922 if (action->arg1 <= 0 || action->arg1 >= IP_FW_TABLEARG) 3923 errx(EX_DATAERR, "illegal argument for %s", 3924 *(av - 1)); 3925 } else if (_substrcmp(*av, "tablearg") == 0) { 3926 action->arg1 = IP_FW_TARG; 3927 } else if (i == TOK_DIVERT || i == TOK_TEE) { 3928 struct servent *s; 3929 setservent(1); 3930 s = getservbyname(av[0], "divert"); 3931 if (s != NULL) 3932 action->arg1 = ntohs(s->s_port); 3933 else 3934 errx(EX_DATAERR, "illegal divert/tee port"); 3935 } else 3936 errx(EX_DATAERR, "illegal argument for %s", *(av - 1)); 3937 av++; 3938 break; 3939 3940 case TOK_FORWARD: { 3941 /* 3942 * Locate the address-port separator (':' or ','). 3943 * Could be one of the following: 3944 * hostname:port 3945 * IPv4 a.b.c.d,port 3946 * IPv4 a.b.c.d:port 3947 * IPv6 w:x:y::z,port 3948 * The ':' can only be used with hostname and IPv4 address. 3949 * XXX-BZ Should we also support [w:x:y::z]:port? 3950 */ 3951 struct sockaddr_storage result; 3952 struct addrinfo *res; 3953 char *s, *end; 3954 int family; 3955 u_short port_number; 3956 3957 NEED1("missing forward address[:port]"); 3958 3959 /* 3960 * locate the address-port separator (':' or ',') 3961 */ 3962 s = strchr(*av, ','); 3963 if (s == NULL) { 3964 /* Distinguish between IPv4:port and IPv6 cases. */ 3965 s = strchr(*av, ':'); 3966 if (s && strchr(s+1, ':')) 3967 s = NULL; /* no port */ 3968 } 3969 3970 port_number = 0; 3971 if (s != NULL) { 3972 /* Terminate host portion and set s to start of port. */ 3973 *(s++) = '\0'; 3974 i = strtoport(s, &end, 0 /* base */, 0 /* proto */); 3975 if (s == end) 3976 errx(EX_DATAERR, 3977 "illegal forwarding port ``%s''", s); 3978 port_number = (u_short)i; 3979 } 3980 3981 if (_substrcmp(*av, "tablearg") == 0) { 3982 family = PF_INET; 3983 ((struct sockaddr_in*)&result)->sin_addr.s_addr = 3984 INADDR_ANY; 3985 } else { 3986 /* 3987 * Resolve the host name or address to a family and a 3988 * network representation of the address. 3989 */ 3990 if (getaddrinfo(*av, NULL, NULL, &res)) 3991 errx(EX_DATAERR, NULL); 3992 /* Just use the first host in the answer. */ 3993 family = res->ai_family; 3994 memcpy(&result, res->ai_addr, res->ai_addrlen); 3995 freeaddrinfo(res); 3996 } 3997 3998 if (family == PF_INET) { 3999 ipfw_insn_sa *p = (ipfw_insn_sa *)action; 4000 4001 action->opcode = O_FORWARD_IP; 4002 action->len = F_INSN_SIZE(ipfw_insn_sa); 4003 CHECK_ACTLEN; 4004 4005 /* 4006 * In the kernel we assume AF_INET and use only 4007 * sin_port and sin_addr. Remember to set sin_len as 4008 * the routing code seems to use it too. 4009 */ 4010 p->sa.sin_len = sizeof(struct sockaddr_in); 4011 p->sa.sin_family = AF_INET; 4012 p->sa.sin_port = port_number; 4013 p->sa.sin_addr.s_addr = 4014 ((struct sockaddr_in *)&result)->sin_addr.s_addr; 4015 } else if (family == PF_INET6) { 4016 ipfw_insn_sa6 *p = (ipfw_insn_sa6 *)action; 4017 4018 action->opcode = O_FORWARD_IP6; 4019 action->len = F_INSN_SIZE(ipfw_insn_sa6); 4020 CHECK_ACTLEN; 4021 4022 p->sa.sin6_len = sizeof(struct sockaddr_in6); 4023 p->sa.sin6_family = AF_INET6; 4024 p->sa.sin6_port = port_number; 4025 p->sa.sin6_flowinfo = 0; 4026 p->sa.sin6_scope_id = 4027 ((struct sockaddr_in6 *)&result)->sin6_scope_id; 4028 bcopy(&((struct sockaddr_in6*)&result)->sin6_addr, 4029 &p->sa.sin6_addr, sizeof(p->sa.sin6_addr)); 4030 } else { 4031 errx(EX_DATAERR, "Invalid address family in forward action"); 4032 } 4033 av++; 4034 break; 4035 } 4036 case TOK_COMMENT: 4037 /* pretend it is a 'count' rule followed by the comment */ 4038 action->opcode = O_COUNT; 4039 av--; /* go back... */ 4040 break; 4041 4042 case TOK_SETFIB: 4043 { 4044 int numfibs; 4045 size_t intsize = sizeof(int); 4046 4047 action->opcode = O_SETFIB; 4048 NEED1("missing fib number"); 4049 if (_substrcmp(*av, "tablearg") == 0) { 4050 action->arg1 = IP_FW_TARG; 4051 } else { 4052 action->arg1 = strtoul(*av, NULL, 10); 4053 if (sysctlbyname("net.fibs", &numfibs, &intsize, 4054 NULL, 0) == -1) 4055 errx(EX_DATAERR, "fibs not suported.\n"); 4056 if (action->arg1 >= numfibs) /* Temporary */ 4057 errx(EX_DATAERR, "fib too large.\n"); 4058 /* Add high-order bit to fib to make room for tablearg*/ 4059 action->arg1 |= 0x8000; 4060 } 4061 av++; 4062 break; 4063 } 4064 4065 case TOK_SETDSCP: 4066 { 4067 int code; 4068 4069 action->opcode = O_SETDSCP; 4070 NEED1("missing DSCP code"); 4071 if (_substrcmp(*av, "tablearg") == 0) { 4072 action->arg1 = IP_FW_TARG; 4073 } else { 4074 if (isalpha(*av[0])) { 4075 if ((code = match_token(f_ipdscp, *av)) == -1) 4076 errx(EX_DATAERR, "Unknown DSCP code"); 4077 action->arg1 = code; 4078 } else 4079 action->arg1 = strtoul(*av, NULL, 10); 4080 /* 4081 * Add high-order bit to DSCP to make room 4082 * for tablearg 4083 */ 4084 action->arg1 |= 0x8000; 4085 } 4086 av++; 4087 break; 4088 } 4089 4090 case TOK_REASS: 4091 action->opcode = O_REASS; 4092 break; 4093 4094 case TOK_RETURN: 4095 fill_cmd(action, O_CALLRETURN, F_NOT, 0); 4096 break; 4097 4098 case TOK_TCPSETMSS: { 4099 u_long mss; 4100 uint16_t idx; 4101 4102 idx = pack_object(tstate, "tcp-setmss", IPFW_TLV_EACTION); 4103 if (idx == 0) 4104 errx(EX_DATAERR, "pack_object failed"); 4105 fill_cmd(action, O_EXTERNAL_ACTION, 0, idx); 4106 NEED1("Missing MSS value"); 4107 action = next_cmd(action, &ablen); 4108 action->len = 1; 4109 CHECK_ACTLEN; 4110 mss = strtoul(*av, NULL, 10); 4111 if (mss == 0 || mss > UINT16_MAX) 4112 errx(EX_USAGE, "invalid MSS value %s", *av); 4113 fill_cmd(action, O_EXTERNAL_DATA, 0, (uint16_t)mss); 4114 av++; 4115 break; 4116 } 4117 4118 default: 4119 av--; 4120 if (match_token(rule_eactions, *av) == -1) 4121 errx(EX_DATAERR, "invalid action %s\n", *av); 4122 /* 4123 * External actions support. 4124 * XXX: we support only syntax with instance name. 4125 * For known external actions (from rule_eactions list) 4126 * we can handle syntax directly. But with `eaction' 4127 * keyword we can use only `eaction <name> <instance>' 4128 * syntax. 4129 */ 4130 case TOK_EACTION: { 4131 uint16_t idx; 4132 4133 NEED1("Missing eaction name"); 4134 if (eaction_check_name(*av) != 0) 4135 errx(EX_DATAERR, "Invalid eaction name %s", *av); 4136 idx = pack_object(tstate, *av, IPFW_TLV_EACTION); 4137 if (idx == 0) 4138 errx(EX_DATAERR, "pack_object failed"); 4139 fill_cmd(action, O_EXTERNAL_ACTION, 0, idx); 4140 av++; 4141 NEED1("Missing eaction instance name"); 4142 action = next_cmd(action, &ablen); 4143 action->len = 1; 4144 CHECK_ACTLEN; 4145 if (eaction_check_name(*av) != 0) 4146 errx(EX_DATAERR, "Invalid eaction instance name %s", 4147 *av); 4148 /* 4149 * External action instance object has TLV type depended 4150 * from the external action name object index. Since we 4151 * currently don't know this index, use zero as TLV type. 4152 */ 4153 idx = pack_object(tstate, *av, 0); 4154 if (idx == 0) 4155 errx(EX_DATAERR, "pack_object failed"); 4156 fill_cmd(action, O_EXTERNAL_INSTANCE, 0, idx); 4157 av++; 4158 } 4159 } 4160 action = next_cmd(action, &ablen); 4161 4162 /* 4163 * [altq queuename] -- altq tag, optional 4164 * [log [logamount N]] -- log, optional 4165 * 4166 * If they exist, it go first in the cmdbuf, but then it is 4167 * skipped in the copy section to the end of the buffer. 4168 */ 4169 while (av[0] != NULL && (i = match_token(rule_action_params, *av)) != -1) { 4170 av++; 4171 switch (i) { 4172 case TOK_LOG: 4173 { 4174 ipfw_insn_log *c = (ipfw_insn_log *)cmd; 4175 int l; 4176 4177 if (have_log) 4178 errx(EX_DATAERR, 4179 "log cannot be specified more than once"); 4180 have_log = (ipfw_insn *)c; 4181 cmd->len = F_INSN_SIZE(ipfw_insn_log); 4182 CHECK_CMDLEN; 4183 cmd->opcode = O_LOG; 4184 if (av[0] && _substrcmp(*av, "logamount") == 0) { 4185 av++; 4186 NEED1("logamount requires argument"); 4187 l = atoi(*av); 4188 if (l < 0) 4189 errx(EX_DATAERR, 4190 "logamount must be positive"); 4191 c->max_log = l; 4192 av++; 4193 } else { 4194 len = sizeof(c->max_log); 4195 if (sysctlbyname("net.inet.ip.fw.verbose_limit", 4196 &c->max_log, &len, NULL, 0) == -1) { 4197 if (co.test_only) { 4198 c->max_log = 0; 4199 break; 4200 } 4201 errx(1, "sysctlbyname(\"%s\")", 4202 "net.inet.ip.fw.verbose_limit"); 4203 } 4204 } 4205 } 4206 break; 4207 4208 #ifndef NO_ALTQ 4209 case TOK_ALTQ: 4210 { 4211 ipfw_insn_altq *a = (ipfw_insn_altq *)cmd; 4212 4213 NEED1("missing altq queue name"); 4214 if (have_altq) 4215 errx(EX_DATAERR, 4216 "altq cannot be specified more than once"); 4217 have_altq = (ipfw_insn *)a; 4218 cmd->len = F_INSN_SIZE(ipfw_insn_altq); 4219 CHECK_CMDLEN; 4220 cmd->opcode = O_ALTQ; 4221 a->qid = altq_name_to_qid(*av); 4222 av++; 4223 } 4224 break; 4225 #endif 4226 4227 case TOK_TAG: 4228 case TOK_UNTAG: { 4229 uint16_t tag; 4230 4231 if (have_tag) 4232 errx(EX_USAGE, "tag and untag cannot be " 4233 "specified more than once"); 4234 GET_UINT_ARG(tag, IPFW_ARG_MIN, IPFW_ARG_MAX, i, 4235 rule_action_params); 4236 have_tag = cmd; 4237 fill_cmd(cmd, O_TAG, (i == TOK_TAG) ? 0: F_NOT, tag); 4238 av++; 4239 break; 4240 } 4241 4242 default: 4243 abort(); 4244 } 4245 cmd = next_cmd(cmd, &cblen); 4246 } 4247 4248 if (have_state) { /* must be a check-state, we are done */ 4249 if (*av != NULL && 4250 match_token(rule_options, *av) == TOK_COMMENT) { 4251 /* check-state has a comment */ 4252 av++; 4253 fill_comment(cmd, av, cblen); 4254 cmd = next_cmd(cmd, &cblen); 4255 av[0] = NULL; 4256 } 4257 goto done; 4258 } 4259 4260 #define OR_START(target) \ 4261 if (av[0] && (*av[0] == '(' || *av[0] == '{')) { \ 4262 if (open_par) \ 4263 errx(EX_USAGE, "nested \"(\" not allowed\n"); \ 4264 prev = NULL; \ 4265 open_par = 1; \ 4266 if ( (av[0])[1] == '\0') { \ 4267 av++; \ 4268 } else \ 4269 (*av)++; \ 4270 } \ 4271 target: \ 4272 4273 4274 #define CLOSE_PAR \ 4275 if (open_par) { \ 4276 if (av[0] && ( \ 4277 strcmp(*av, ")") == 0 || \ 4278 strcmp(*av, "}") == 0)) { \ 4279 prev = NULL; \ 4280 open_par = 0; \ 4281 av++; \ 4282 } else \ 4283 errx(EX_USAGE, "missing \")\"\n"); \ 4284 } 4285 4286 #define NOT_BLOCK \ 4287 if (av[0] && _substrcmp(*av, "not") == 0) { \ 4288 if (cmd->len & F_NOT) \ 4289 errx(EX_USAGE, "double \"not\" not allowed\n"); \ 4290 cmd->len |= F_NOT; \ 4291 av++; \ 4292 } 4293 4294 #define OR_BLOCK(target) \ 4295 if (av[0] && _substrcmp(*av, "or") == 0) { \ 4296 if (prev == NULL || open_par == 0) \ 4297 errx(EX_DATAERR, "invalid OR block"); \ 4298 prev->len |= F_OR; \ 4299 av++; \ 4300 goto target; \ 4301 } \ 4302 CLOSE_PAR; 4303 4304 first_cmd = cmd; 4305 4306 #if 0 4307 /* 4308 * MAC addresses, optional. 4309 * If we have this, we skip the part "proto from src to dst" 4310 * and jump straight to the option parsing. 4311 */ 4312 NOT_BLOCK; 4313 NEED1("missing protocol"); 4314 if (_substrcmp(*av, "MAC") == 0 || 4315 _substrcmp(*av, "mac") == 0) { 4316 av++; /* the "MAC" keyword */ 4317 add_mac(cmd, av); /* exits in case of errors */ 4318 cmd = next_cmd(cmd); 4319 av += 2; /* dst-mac and src-mac */ 4320 NOT_BLOCK; 4321 NEED1("missing mac type"); 4322 if (add_mactype(cmd, av[0])) 4323 cmd = next_cmd(cmd); 4324 av++; /* any or mac-type */ 4325 goto read_options; 4326 } 4327 #endif 4328 4329 /* 4330 * protocol, mandatory 4331 */ 4332 OR_START(get_proto); 4333 NOT_BLOCK; 4334 NEED1("missing protocol"); 4335 if (add_proto_compat(cmd, *av, &proto)) { 4336 av++; 4337 if (F_LEN(cmd) != 0) { 4338 prev = cmd; 4339 cmd = next_cmd(cmd, &cblen); 4340 } 4341 } else if (first_cmd != cmd) { 4342 errx(EX_DATAERR, "invalid protocol ``%s''", *av); 4343 } else 4344 goto read_options; 4345 OR_BLOCK(get_proto); 4346 4347 /* 4348 * "from", mandatory 4349 */ 4350 if ((av[0] == NULL) || _substrcmp(*av, "from") != 0) 4351 errx(EX_USAGE, "missing ``from''"); 4352 av++; 4353 4354 /* 4355 * source IP, mandatory 4356 */ 4357 OR_START(source_ip); 4358 NOT_BLOCK; /* optional "not" */ 4359 NEED1("missing source address"); 4360 if (add_src(cmd, *av, proto, cblen, tstate)) { 4361 av++; 4362 if (F_LEN(cmd) != 0) { /* ! any */ 4363 prev = cmd; 4364 cmd = next_cmd(cmd, &cblen); 4365 } 4366 } else 4367 errx(EX_USAGE, "bad source address %s", *av); 4368 OR_BLOCK(source_ip); 4369 4370 /* 4371 * source ports, optional 4372 */ 4373 NOT_BLOCK; /* optional "not" */ 4374 if ( av[0] != NULL ) { 4375 if (_substrcmp(*av, "any") == 0 || 4376 add_ports(cmd, *av, proto, O_IP_SRCPORT, cblen)) { 4377 av++; 4378 if (F_LEN(cmd) != 0) 4379 cmd = next_cmd(cmd, &cblen); 4380 } 4381 } 4382 4383 /* 4384 * "to", mandatory 4385 */ 4386 if ( (av[0] == NULL) || _substrcmp(*av, "to") != 0 ) 4387 errx(EX_USAGE, "missing ``to''"); 4388 av++; 4389 4390 /* 4391 * destination, mandatory 4392 */ 4393 OR_START(dest_ip); 4394 NOT_BLOCK; /* optional "not" */ 4395 NEED1("missing dst address"); 4396 if (add_dst(cmd, *av, proto, cblen, tstate)) { 4397 av++; 4398 if (F_LEN(cmd) != 0) { /* ! any */ 4399 prev = cmd; 4400 cmd = next_cmd(cmd, &cblen); 4401 } 4402 } else 4403 errx( EX_USAGE, "bad destination address %s", *av); 4404 OR_BLOCK(dest_ip); 4405 4406 /* 4407 * dest. ports, optional 4408 */ 4409 NOT_BLOCK; /* optional "not" */ 4410 if (av[0]) { 4411 if (_substrcmp(*av, "any") == 0 || 4412 add_ports(cmd, *av, proto, O_IP_DSTPORT, cblen)) { 4413 av++; 4414 if (F_LEN(cmd) != 0) 4415 cmd = next_cmd(cmd, &cblen); 4416 } 4417 } 4418 4419 read_options: 4420 prev = NULL; 4421 while ( av[0] != NULL ) { 4422 char *s; 4423 ipfw_insn_u32 *cmd32; /* alias for cmd */ 4424 4425 s = *av; 4426 cmd32 = (ipfw_insn_u32 *)cmd; 4427 4428 if (*s == '!') { /* alternate syntax for NOT */ 4429 if (cmd->len & F_NOT) 4430 errx(EX_USAGE, "double \"not\" not allowed\n"); 4431 cmd->len = F_NOT; 4432 s++; 4433 } 4434 i = match_token(rule_options, s); 4435 av++; 4436 switch(i) { 4437 case TOK_NOT: 4438 if (cmd->len & F_NOT) 4439 errx(EX_USAGE, "double \"not\" not allowed\n"); 4440 cmd->len = F_NOT; 4441 break; 4442 4443 case TOK_OR: 4444 if (open_par == 0 || prev == NULL) 4445 errx(EX_USAGE, "invalid \"or\" block\n"); 4446 prev->len |= F_OR; 4447 break; 4448 4449 case TOK_STARTBRACE: 4450 if (open_par) 4451 errx(EX_USAGE, "+nested \"(\" not allowed\n"); 4452 open_par = 1; 4453 break; 4454 4455 case TOK_ENDBRACE: 4456 if (!open_par) 4457 errx(EX_USAGE, "+missing \")\"\n"); 4458 open_par = 0; 4459 prev = NULL; 4460 break; 4461 4462 case TOK_IN: 4463 fill_cmd(cmd, O_IN, 0, 0); 4464 break; 4465 4466 case TOK_OUT: 4467 cmd->len ^= F_NOT; /* toggle F_NOT */ 4468 fill_cmd(cmd, O_IN, 0, 0); 4469 break; 4470 4471 case TOK_DIVERTED: 4472 fill_cmd(cmd, O_DIVERTED, 0, 3); 4473 break; 4474 4475 case TOK_DIVERTEDLOOPBACK: 4476 fill_cmd(cmd, O_DIVERTED, 0, 1); 4477 break; 4478 4479 case TOK_DIVERTEDOUTPUT: 4480 fill_cmd(cmd, O_DIVERTED, 0, 2); 4481 break; 4482 4483 case TOK_FRAG: 4484 fill_cmd(cmd, O_FRAG, 0, 0); 4485 break; 4486 4487 case TOK_LAYER2: 4488 fill_cmd(cmd, O_LAYER2, 0, 0); 4489 break; 4490 4491 case TOK_XMIT: 4492 case TOK_RECV: 4493 case TOK_VIA: 4494 NEED1("recv, xmit, via require interface name" 4495 " or address"); 4496 fill_iface((ipfw_insn_if *)cmd, av[0], cblen, tstate); 4497 av++; 4498 if (F_LEN(cmd) == 0) /* not a valid address */ 4499 break; 4500 if (i == TOK_XMIT) 4501 cmd->opcode = O_XMIT; 4502 else if (i == TOK_RECV) 4503 cmd->opcode = O_RECV; 4504 else if (i == TOK_VIA) 4505 cmd->opcode = O_VIA; 4506 break; 4507 4508 case TOK_ICMPTYPES: 4509 NEED1("icmptypes requires list of types"); 4510 fill_icmptypes((ipfw_insn_u32 *)cmd, *av); 4511 av++; 4512 break; 4513 4514 case TOK_ICMP6TYPES: 4515 NEED1("icmptypes requires list of types"); 4516 fill_icmp6types((ipfw_insn_icmp6 *)cmd, *av, cblen); 4517 av++; 4518 break; 4519 4520 case TOK_IPTTL: 4521 NEED1("ipttl requires TTL"); 4522 if (strpbrk(*av, "-,")) { 4523 if (!add_ports(cmd, *av, 0, O_IPTTL, cblen)) 4524 errx(EX_DATAERR, "invalid ipttl %s", *av); 4525 } else 4526 fill_cmd(cmd, O_IPTTL, 0, strtoul(*av, NULL, 0)); 4527 av++; 4528 break; 4529 4530 case TOK_IPID: 4531 NEED1("ipid requires id"); 4532 if (strpbrk(*av, "-,")) { 4533 if (!add_ports(cmd, *av, 0, O_IPID, cblen)) 4534 errx(EX_DATAERR, "invalid ipid %s", *av); 4535 } else 4536 fill_cmd(cmd, O_IPID, 0, strtoul(*av, NULL, 0)); 4537 av++; 4538 break; 4539 4540 case TOK_IPLEN: 4541 NEED1("iplen requires length"); 4542 if (strpbrk(*av, "-,")) { 4543 if (!add_ports(cmd, *av, 0, O_IPLEN, cblen)) 4544 errx(EX_DATAERR, "invalid ip len %s", *av); 4545 } else 4546 fill_cmd(cmd, O_IPLEN, 0, strtoul(*av, NULL, 0)); 4547 av++; 4548 break; 4549 4550 case TOK_IPVER: 4551 NEED1("ipver requires version"); 4552 fill_cmd(cmd, O_IPVER, 0, strtoul(*av, NULL, 0)); 4553 av++; 4554 break; 4555 4556 case TOK_IPPRECEDENCE: 4557 NEED1("ipprecedence requires value"); 4558 fill_cmd(cmd, O_IPPRECEDENCE, 0, 4559 (strtoul(*av, NULL, 0) & 7) << 5); 4560 av++; 4561 break; 4562 4563 case TOK_DSCP: 4564 NEED1("missing DSCP code"); 4565 fill_dscp(cmd, *av, cblen); 4566 av++; 4567 break; 4568 4569 case TOK_IPOPTS: 4570 NEED1("missing argument for ipoptions"); 4571 fill_flags_cmd(cmd, O_IPOPT, f_ipopts, *av); 4572 av++; 4573 break; 4574 4575 case TOK_IPTOS: 4576 NEED1("missing argument for iptos"); 4577 fill_flags_cmd(cmd, O_IPTOS, f_iptos, *av); 4578 av++; 4579 break; 4580 4581 case TOK_UID: 4582 NEED1("uid requires argument"); 4583 { 4584 char *end; 4585 uid_t uid; 4586 struct passwd *pwd; 4587 4588 cmd->opcode = O_UID; 4589 uid = strtoul(*av, &end, 0); 4590 pwd = (*end == '\0') ? getpwuid(uid) : getpwnam(*av); 4591 if (pwd == NULL) 4592 errx(EX_DATAERR, "uid \"%s\" nonexistent", *av); 4593 cmd32->d[0] = pwd->pw_uid; 4594 cmd->len |= F_INSN_SIZE(ipfw_insn_u32); 4595 av++; 4596 } 4597 break; 4598 4599 case TOK_GID: 4600 NEED1("gid requires argument"); 4601 { 4602 char *end; 4603 gid_t gid; 4604 struct group *grp; 4605 4606 cmd->opcode = O_GID; 4607 gid = strtoul(*av, &end, 0); 4608 grp = (*end == '\0') ? getgrgid(gid) : getgrnam(*av); 4609 if (grp == NULL) 4610 errx(EX_DATAERR, "gid \"%s\" nonexistent", *av); 4611 cmd32->d[0] = grp->gr_gid; 4612 cmd->len |= F_INSN_SIZE(ipfw_insn_u32); 4613 av++; 4614 } 4615 break; 4616 4617 case TOK_JAIL: 4618 NEED1("jail requires argument"); 4619 { 4620 int jid; 4621 4622 cmd->opcode = O_JAIL; 4623 jid = jail_getid(*av); 4624 if (jid < 0) 4625 errx(EX_DATAERR, "%s", jail_errmsg); 4626 cmd32->d[0] = (uint32_t)jid; 4627 cmd->len |= F_INSN_SIZE(ipfw_insn_u32); 4628 av++; 4629 } 4630 break; 4631 4632 case TOK_ESTAB: 4633 fill_cmd(cmd, O_ESTAB, 0, 0); 4634 break; 4635 4636 case TOK_SETUP: 4637 fill_cmd(cmd, O_TCPFLAGS, 0, 4638 (TH_SYN) | ( (TH_ACK) & 0xff) <<8 ); 4639 break; 4640 4641 case TOK_TCPDATALEN: 4642 NEED1("tcpdatalen requires length"); 4643 if (strpbrk(*av, "-,")) { 4644 if (!add_ports(cmd, *av, 0, O_TCPDATALEN, cblen)) 4645 errx(EX_DATAERR, "invalid tcpdata len %s", *av); 4646 } else 4647 fill_cmd(cmd, O_TCPDATALEN, 0, 4648 strtoul(*av, NULL, 0)); 4649 av++; 4650 break; 4651 4652 case TOK_TCPOPTS: 4653 NEED1("missing argument for tcpoptions"); 4654 fill_flags_cmd(cmd, O_TCPOPTS, f_tcpopts, *av); 4655 av++; 4656 break; 4657 4658 case TOK_TCPSEQ: 4659 case TOK_TCPACK: 4660 NEED1("tcpseq/tcpack requires argument"); 4661 cmd->len = F_INSN_SIZE(ipfw_insn_u32); 4662 cmd->opcode = (i == TOK_TCPSEQ) ? O_TCPSEQ : O_TCPACK; 4663 cmd32->d[0] = htonl(strtoul(*av, NULL, 0)); 4664 av++; 4665 break; 4666 4667 case TOK_TCPWIN: 4668 NEED1("tcpwin requires length"); 4669 if (strpbrk(*av, "-,")) { 4670 if (!add_ports(cmd, *av, 0, O_TCPWIN, cblen)) 4671 errx(EX_DATAERR, "invalid tcpwin len %s", *av); 4672 } else 4673 fill_cmd(cmd, O_TCPWIN, 0, 4674 strtoul(*av, NULL, 0)); 4675 av++; 4676 break; 4677 4678 case TOK_TCPFLAGS: 4679 NEED1("missing argument for tcpflags"); 4680 cmd->opcode = O_TCPFLAGS; 4681 fill_flags_cmd(cmd, O_TCPFLAGS, f_tcpflags, *av); 4682 av++; 4683 break; 4684 4685 case TOK_KEEPSTATE: 4686 case TOK_RECORDSTATE: { 4687 uint16_t uidx; 4688 4689 if (open_par) 4690 errx(EX_USAGE, "keep-state or record-state cannot be part " 4691 "of an or block"); 4692 if (have_state) 4693 errx(EX_USAGE, "only one of keep-state, record-state, " 4694 " limit and set-limit is allowed"); 4695 if (*av != NULL && *av[0] == ':') { 4696 if (state_check_name(*av + 1) != 0) 4697 errx(EX_DATAERR, 4698 "Invalid state name %s", *av); 4699 uidx = pack_object(tstate, *av + 1, 4700 IPFW_TLV_STATE_NAME); 4701 av++; 4702 } else 4703 uidx = pack_object(tstate, default_state_name, 4704 IPFW_TLV_STATE_NAME); 4705 have_state = cmd; 4706 have_rstate = i == TOK_RECORDSTATE; 4707 fill_cmd(cmd, O_KEEP_STATE, 0, uidx); 4708 break; 4709 } 4710 4711 case TOK_LIMIT: 4712 case TOK_SETLIMIT: { 4713 ipfw_insn_limit *c = (ipfw_insn_limit *)cmd; 4714 int val; 4715 4716 if (open_par) 4717 errx(EX_USAGE, 4718 "limit or set-limit cannot be part of an or block"); 4719 if (have_state) 4720 errx(EX_USAGE, "only one of keep-state, record-state, " 4721 " limit and set-limit is allowed"); 4722 have_state = cmd; 4723 have_rstate = i == TOK_SETLIMIT; 4724 4725 cmd->len = F_INSN_SIZE(ipfw_insn_limit); 4726 CHECK_CMDLEN; 4727 cmd->opcode = O_LIMIT; 4728 c->limit_mask = c->conn_limit = 0; 4729 4730 while ( av[0] != NULL ) { 4731 if ((val = match_token(limit_masks, *av)) <= 0) 4732 break; 4733 c->limit_mask |= val; 4734 av++; 4735 } 4736 4737 if (c->limit_mask == 0) 4738 errx(EX_USAGE, "limit: missing limit mask"); 4739 4740 GET_UINT_ARG(c->conn_limit, IPFW_ARG_MIN, IPFW_ARG_MAX, 4741 TOK_LIMIT, rule_options); 4742 av++; 4743 4744 if (*av != NULL && *av[0] == ':') { 4745 if (state_check_name(*av + 1) != 0) 4746 errx(EX_DATAERR, 4747 "Invalid state name %s", *av); 4748 cmd->arg1 = pack_object(tstate, *av + 1, 4749 IPFW_TLV_STATE_NAME); 4750 av++; 4751 } else 4752 cmd->arg1 = pack_object(tstate, 4753 default_state_name, IPFW_TLV_STATE_NAME); 4754 break; 4755 } 4756 4757 case TOK_PROTO: 4758 NEED1("missing protocol"); 4759 if (add_proto(cmd, *av, &proto)) { 4760 av++; 4761 } else 4762 errx(EX_DATAERR, "invalid protocol ``%s''", 4763 *av); 4764 break; 4765 4766 case TOK_SRCIP: 4767 NEED1("missing source IP"); 4768 if (add_srcip(cmd, *av, cblen, tstate)) { 4769 av++; 4770 } 4771 break; 4772 4773 case TOK_DSTIP: 4774 NEED1("missing destination IP"); 4775 if (add_dstip(cmd, *av, cblen, tstate)) { 4776 av++; 4777 } 4778 break; 4779 4780 case TOK_SRCIP6: 4781 NEED1("missing source IP6"); 4782 if (add_srcip6(cmd, *av, cblen, tstate)) { 4783 av++; 4784 } 4785 break; 4786 4787 case TOK_DSTIP6: 4788 NEED1("missing destination IP6"); 4789 if (add_dstip6(cmd, *av, cblen, tstate)) { 4790 av++; 4791 } 4792 break; 4793 4794 case TOK_SRCPORT: 4795 NEED1("missing source port"); 4796 if (_substrcmp(*av, "any") == 0 || 4797 add_ports(cmd, *av, proto, O_IP_SRCPORT, cblen)) { 4798 av++; 4799 } else 4800 errx(EX_DATAERR, "invalid source port %s", *av); 4801 break; 4802 4803 case TOK_DSTPORT: 4804 NEED1("missing destination port"); 4805 if (_substrcmp(*av, "any") == 0 || 4806 add_ports(cmd, *av, proto, O_IP_DSTPORT, cblen)) { 4807 av++; 4808 } else 4809 errx(EX_DATAERR, "invalid destination port %s", 4810 *av); 4811 break; 4812 4813 case TOK_MAC: 4814 if (add_mac(cmd, av, cblen)) 4815 av += 2; 4816 break; 4817 4818 case TOK_MACTYPE: 4819 NEED1("missing mac type"); 4820 if (!add_mactype(cmd, *av, cblen)) 4821 errx(EX_DATAERR, "invalid mac type %s", *av); 4822 av++; 4823 break; 4824 4825 case TOK_VERREVPATH: 4826 fill_cmd(cmd, O_VERREVPATH, 0, 0); 4827 break; 4828 4829 case TOK_VERSRCREACH: 4830 fill_cmd(cmd, O_VERSRCREACH, 0, 0); 4831 break; 4832 4833 case TOK_ANTISPOOF: 4834 fill_cmd(cmd, O_ANTISPOOF, 0, 0); 4835 break; 4836 4837 case TOK_IPSEC: 4838 fill_cmd(cmd, O_IPSEC, 0, 0); 4839 break; 4840 4841 case TOK_IPV6: 4842 fill_cmd(cmd, O_IP6, 0, 0); 4843 break; 4844 4845 case TOK_IPV4: 4846 fill_cmd(cmd, O_IP4, 0, 0); 4847 break; 4848 4849 case TOK_EXT6HDR: 4850 fill_ext6hdr( cmd, *av ); 4851 av++; 4852 break; 4853 4854 case TOK_FLOWID: 4855 if (proto != IPPROTO_IPV6 ) 4856 errx( EX_USAGE, "flow-id filter is active " 4857 "only for ipv6 protocol\n"); 4858 fill_flow6( (ipfw_insn_u32 *) cmd, *av, cblen); 4859 av++; 4860 break; 4861 4862 case TOK_COMMENT: 4863 fill_comment(cmd, av, cblen); 4864 av[0]=NULL; 4865 break; 4866 4867 case TOK_TAGGED: 4868 if (av[0] && strpbrk(*av, "-,")) { 4869 if (!add_ports(cmd, *av, 0, O_TAGGED, cblen)) 4870 errx(EX_DATAERR, "tagged: invalid tag" 4871 " list: %s", *av); 4872 } 4873 else { 4874 uint16_t tag; 4875 4876 GET_UINT_ARG(tag, IPFW_ARG_MIN, IPFW_ARG_MAX, 4877 TOK_TAGGED, rule_options); 4878 fill_cmd(cmd, O_TAGGED, 0, tag); 4879 } 4880 av++; 4881 break; 4882 4883 case TOK_FIB: 4884 NEED1("fib requires fib number"); 4885 fill_cmd(cmd, O_FIB, 0, strtoul(*av, NULL, 0)); 4886 av++; 4887 break; 4888 case TOK_SOCKARG: 4889 fill_cmd(cmd, O_SOCKARG, 0, 0); 4890 break; 4891 4892 case TOK_LOOKUP: { 4893 ipfw_insn_u32 *c = (ipfw_insn_u32 *)cmd; 4894 int j; 4895 4896 if (!av[0] || !av[1]) 4897 errx(EX_USAGE, "format: lookup argument tablenum"); 4898 cmd->opcode = O_IP_DST_LOOKUP; 4899 cmd->len |= F_INSN_SIZE(ipfw_insn) + 2; 4900 i = match_token(rule_options, *av); 4901 for (j = 0; lookup_key[j] >= 0 ; j++) { 4902 if (i == lookup_key[j]) 4903 break; 4904 } 4905 if (lookup_key[j] <= 0) 4906 errx(EX_USAGE, "format: cannot lookup on %s", *av); 4907 __PAST_END(c->d, 1) = j; // i converted to option 4908 av++; 4909 4910 if ((j = pack_table(tstate, *av)) == 0) 4911 errx(EX_DATAERR, "Invalid table name: %s", *av); 4912 4913 cmd->arg1 = j; 4914 av++; 4915 } 4916 break; 4917 case TOK_FLOW: 4918 NEED1("missing table name"); 4919 if (strncmp(*av, "table(", 6) != 0) 4920 errx(EX_DATAERR, 4921 "enclose table name into \"table()\""); 4922 fill_table(cmd, *av, O_IP_FLOW_LOOKUP, tstate); 4923 av++; 4924 break; 4925 4926 case TOK_SKIPACTION: 4927 if (have_skipcmd) 4928 errx(EX_USAGE, "only one defer-action " 4929 "is allowed"); 4930 have_skipcmd = cmd; 4931 fill_cmd(cmd, O_SKIP_ACTION, 0, 0); 4932 break; 4933 4934 default: 4935 errx(EX_USAGE, "unrecognised option [%d] %s\n", i, s); 4936 } 4937 if (F_LEN(cmd) > 0) { /* prepare to advance */ 4938 prev = cmd; 4939 cmd = next_cmd(cmd, &cblen); 4940 } 4941 } 4942 4943 done: 4944 4945 if (!have_state && have_skipcmd) 4946 warnx("Rule contains \"defer-immediate-action\" " 4947 "and doesn't contain any state-related options."); 4948 4949 /* 4950 * Now copy stuff into the rule. 4951 * If we have a keep-state option, the first instruction 4952 * must be a PROBE_STATE (which is generated here). 4953 * If we have a LOG option, it was stored as the first command, 4954 * and now must be moved to the top of the action part. 4955 */ 4956 dst = (ipfw_insn *)rule->cmd; 4957 4958 /* 4959 * First thing to write into the command stream is the match probability. 4960 */ 4961 if (match_prob != 1) { /* 1 means always match */ 4962 dst->opcode = O_PROB; 4963 dst->len = 2; 4964 *((int32_t *)(dst+1)) = (int32_t)(match_prob * 0x7fffffff); 4965 dst += dst->len; 4966 } 4967 4968 /* 4969 * generate O_PROBE_STATE if necessary 4970 */ 4971 if (have_state && have_state->opcode != O_CHECK_STATE && !have_rstate) { 4972 fill_cmd(dst, O_PROBE_STATE, 0, have_state->arg1); 4973 dst = next_cmd(dst, &rblen); 4974 } 4975 4976 /* 4977 * copy all commands but O_LOG, O_KEEP_STATE, O_LIMIT, O_ALTQ, O_TAG, 4978 * O_SKIP_ACTION 4979 */ 4980 for (src = (ipfw_insn *)cmdbuf; src != cmd; src += i) { 4981 i = F_LEN(src); 4982 CHECK_RBUFLEN(i); 4983 4984 switch (src->opcode) { 4985 case O_LOG: 4986 case O_KEEP_STATE: 4987 case O_LIMIT: 4988 case O_ALTQ: 4989 case O_TAG: 4990 case O_SKIP_ACTION: 4991 break; 4992 default: 4993 bcopy(src, dst, i * sizeof(uint32_t)); 4994 dst += i; 4995 } 4996 } 4997 4998 /* 4999 * put back the have_state command as last opcode 5000 */ 5001 if (have_state && have_state->opcode != O_CHECK_STATE) { 5002 i = F_LEN(have_state); 5003 CHECK_RBUFLEN(i); 5004 bcopy(have_state, dst, i * sizeof(uint32_t)); 5005 dst += i; 5006 } 5007 5008 /* 5009 * put back the have_skipcmd command as very last opcode 5010 */ 5011 if (have_skipcmd) { 5012 i = F_LEN(have_skipcmd); 5013 CHECK_RBUFLEN(i); 5014 bcopy(have_skipcmd, dst, i * sizeof(uint32_t)); 5015 dst += i; 5016 } 5017 5018 /* 5019 * start action section 5020 */ 5021 rule->act_ofs = dst - rule->cmd; 5022 5023 /* put back O_LOG, O_ALTQ, O_TAG if necessary */ 5024 if (have_log) { 5025 i = F_LEN(have_log); 5026 CHECK_RBUFLEN(i); 5027 bcopy(have_log, dst, i * sizeof(uint32_t)); 5028 dst += i; 5029 } 5030 if (have_altq) { 5031 i = F_LEN(have_altq); 5032 CHECK_RBUFLEN(i); 5033 bcopy(have_altq, dst, i * sizeof(uint32_t)); 5034 dst += i; 5035 } 5036 if (have_tag) { 5037 i = F_LEN(have_tag); 5038 CHECK_RBUFLEN(i); 5039 bcopy(have_tag, dst, i * sizeof(uint32_t)); 5040 dst += i; 5041 } 5042 5043 /* 5044 * copy all other actions 5045 */ 5046 for (src = (ipfw_insn *)actbuf; src != action; src += i) { 5047 i = F_LEN(src); 5048 CHECK_RBUFLEN(i); 5049 bcopy(src, dst, i * sizeof(uint32_t)); 5050 dst += i; 5051 } 5052 5053 rule->cmd_len = (uint32_t *)dst - (uint32_t *)(rule->cmd); 5054 *rbufsize = (char *)dst - (char *)rule; 5055 } 5056 5057 static int 5058 compare_ntlv(const void *_a, const void *_b) 5059 { 5060 ipfw_obj_ntlv *a, *b; 5061 5062 a = (ipfw_obj_ntlv *)_a; 5063 b = (ipfw_obj_ntlv *)_b; 5064 5065 if (a->set < b->set) 5066 return (-1); 5067 else if (a->set > b->set) 5068 return (1); 5069 5070 if (a->idx < b->idx) 5071 return (-1); 5072 else if (a->idx > b->idx) 5073 return (1); 5074 5075 if (a->head.type < b->head.type) 5076 return (-1); 5077 else if (a->head.type > b->head.type) 5078 return (1); 5079 5080 return (0); 5081 } 5082 5083 /* 5084 * Provide kernel with sorted list of referenced objects 5085 */ 5086 static void 5087 object_sort_ctlv(ipfw_obj_ctlv *ctlv) 5088 { 5089 5090 qsort(ctlv + 1, ctlv->count, ctlv->objsize, compare_ntlv); 5091 } 5092 5093 struct object_kt { 5094 uint16_t uidx; 5095 uint16_t type; 5096 }; 5097 static int 5098 compare_object_kntlv(const void *k, const void *v) 5099 { 5100 ipfw_obj_ntlv *ntlv; 5101 struct object_kt key; 5102 5103 key = *((struct object_kt *)k); 5104 ntlv = (ipfw_obj_ntlv *)v; 5105 5106 if (key.uidx < ntlv->idx) 5107 return (-1); 5108 else if (key.uidx > ntlv->idx) 5109 return (1); 5110 5111 if (key.type < ntlv->head.type) 5112 return (-1); 5113 else if (key.type > ntlv->head.type) 5114 return (1); 5115 5116 return (0); 5117 } 5118 5119 /* 5120 * Finds object name in @ctlv by @idx and @type. 5121 * Uses the following facts: 5122 * 1) All TLVs are the same size 5123 * 2) Kernel implementation provides already sorted list. 5124 * 5125 * Returns table name or NULL. 5126 */ 5127 static char * 5128 object_search_ctlv(ipfw_obj_ctlv *ctlv, uint16_t idx, uint16_t type) 5129 { 5130 ipfw_obj_ntlv *ntlv; 5131 struct object_kt key; 5132 5133 key.uidx = idx; 5134 key.type = type; 5135 5136 ntlv = bsearch(&key, (ctlv + 1), ctlv->count, ctlv->objsize, 5137 compare_object_kntlv); 5138 5139 if (ntlv != NULL) 5140 return (ntlv->name); 5141 5142 return (NULL); 5143 } 5144 5145 static char * 5146 table_search_ctlv(ipfw_obj_ctlv *ctlv, uint16_t idx) 5147 { 5148 5149 return (object_search_ctlv(ctlv, idx, IPFW_TLV_TBL_NAME)); 5150 } 5151 5152 /* 5153 * Adds one or more rules to ipfw chain. 5154 * Data layout: 5155 * Request: 5156 * [ 5157 * ip_fw3_opheader 5158 * [ ipfw_obj_ctlv(IPFW_TLV_TBL_LIST) ipfw_obj_ntlv x N ] (optional *1) 5159 * [ ipfw_obj_ctlv(IPFW_TLV_RULE_LIST) [ ip_fw_rule ip_fw_insn ] x N ] (*2) (*3) 5160 * ] 5161 * Reply: 5162 * [ 5163 * ip_fw3_opheader 5164 * [ ipfw_obj_ctlv(IPFW_TLV_TBL_LIST) ipfw_obj_ntlv x N ] (optional) 5165 * [ ipfw_obj_ctlv(IPFW_TLV_RULE_LIST) [ ip_fw_rule ip_fw_insn ] x N ] 5166 * ] 5167 * 5168 * Rules in reply are modified to store their actual ruleset number. 5169 * 5170 * (*1) TLVs inside IPFW_TLV_TBL_LIST needs to be sorted ascending 5171 * according to their idx field and there has to be no duplicates. 5172 * (*2) Numbered rules inside IPFW_TLV_RULE_LIST needs to be sorted ascending. 5173 * (*3) Each ip_fw structure needs to be aligned to u64 boundary. 5174 */ 5175 void 5176 ipfw_add(char *av[]) 5177 { 5178 uint32_t rulebuf[1024]; 5179 int rbufsize, default_off, tlen, rlen; 5180 size_t sz; 5181 struct tidx ts; 5182 struct ip_fw_rule *rule; 5183 caddr_t tbuf; 5184 ip_fw3_opheader *op3; 5185 ipfw_obj_ctlv *ctlv, *tstate; 5186 5187 rbufsize = sizeof(rulebuf); 5188 memset(rulebuf, 0, rbufsize); 5189 memset(&ts, 0, sizeof(ts)); 5190 5191 /* Optimize case with no tables */ 5192 default_off = sizeof(ipfw_obj_ctlv) + sizeof(ip_fw3_opheader); 5193 op3 = (ip_fw3_opheader *)rulebuf; 5194 ctlv = (ipfw_obj_ctlv *)(op3 + 1); 5195 rule = (struct ip_fw_rule *)(ctlv + 1); 5196 rbufsize -= default_off; 5197 5198 compile_rule(av, (uint32_t *)rule, &rbufsize, &ts); 5199 /* Align rule size to u64 boundary */ 5200 rlen = roundup2(rbufsize, sizeof(uint64_t)); 5201 5202 tbuf = NULL; 5203 sz = 0; 5204 tstate = NULL; 5205 if (ts.count != 0) { 5206 /* Some tables. We have to alloc more data */ 5207 tlen = ts.count * sizeof(ipfw_obj_ntlv); 5208 sz = default_off + sizeof(ipfw_obj_ctlv) + tlen + rlen; 5209 5210 if ((tbuf = calloc(1, sz)) == NULL) 5211 err(EX_UNAVAILABLE, "malloc() failed for IP_FW_ADD"); 5212 op3 = (ip_fw3_opheader *)tbuf; 5213 /* Tables first */ 5214 ctlv = (ipfw_obj_ctlv *)(op3 + 1); 5215 ctlv->head.type = IPFW_TLV_TBLNAME_LIST; 5216 ctlv->head.length = sizeof(ipfw_obj_ctlv) + tlen; 5217 ctlv->count = ts.count; 5218 ctlv->objsize = sizeof(ipfw_obj_ntlv); 5219 memcpy(ctlv + 1, ts.idx, tlen); 5220 object_sort_ctlv(ctlv); 5221 tstate = ctlv; 5222 /* Rule next */ 5223 ctlv = (ipfw_obj_ctlv *)((caddr_t)ctlv + ctlv->head.length); 5224 ctlv->head.type = IPFW_TLV_RULE_LIST; 5225 ctlv->head.length = sizeof(ipfw_obj_ctlv) + rlen; 5226 ctlv->count = 1; 5227 memcpy(ctlv + 1, rule, rbufsize); 5228 } else { 5229 /* Simply add header */ 5230 sz = rlen + default_off; 5231 memset(ctlv, 0, sizeof(*ctlv)); 5232 ctlv->head.type = IPFW_TLV_RULE_LIST; 5233 ctlv->head.length = sizeof(ipfw_obj_ctlv) + rlen; 5234 ctlv->count = 1; 5235 } 5236 5237 if (do_get3(IP_FW_XADD, op3, &sz) != 0) 5238 err(EX_UNAVAILABLE, "getsockopt(%s)", "IP_FW_XADD"); 5239 5240 if (!co.do_quiet) { 5241 struct format_opts sfo; 5242 struct buf_pr bp; 5243 memset(&sfo, 0, sizeof(sfo)); 5244 sfo.tstate = tstate; 5245 sfo.set_mask = (uint32_t)(-1); 5246 bp_alloc(&bp, 4096); 5247 show_static_rule(&co, &sfo, &bp, rule, NULL); 5248 printf("%s", bp.buf); 5249 bp_free(&bp); 5250 } 5251 5252 if (tbuf != NULL) 5253 free(tbuf); 5254 5255 if (ts.idx != NULL) 5256 free(ts.idx); 5257 } 5258 5259 /* 5260 * clear the counters or the log counters. 5261 * optname has the following values: 5262 * 0 (zero both counters and logging) 5263 * 1 (zero logging only) 5264 */ 5265 void 5266 ipfw_zero(int ac, char *av[], int optname) 5267 { 5268 ipfw_range_tlv rt; 5269 char const *errstr; 5270 char const *name = optname ? "RESETLOG" : "ZERO"; 5271 uint32_t arg; 5272 int failed = EX_OK; 5273 5274 optname = optname ? IP_FW_XRESETLOG : IP_FW_XZERO; 5275 av++; ac--; 5276 5277 if (ac == 0) { 5278 /* clear all entries */ 5279 memset(&rt, 0, sizeof(rt)); 5280 rt.flags = IPFW_RCFLAG_ALL; 5281 if (do_range_cmd(optname, &rt) < 0) 5282 err(EX_UNAVAILABLE, "setsockopt(IP_FW_X%s)", name); 5283 if (!co.do_quiet) 5284 printf("%s.\n", optname == IP_FW_XZERO ? 5285 "Accounting cleared":"Logging counts reset"); 5286 5287 return; 5288 } 5289 5290 while (ac) { 5291 /* Rule number */ 5292 if (isdigit(**av)) { 5293 arg = strtonum(*av, 0, 0xffff, &errstr); 5294 if (errstr) 5295 errx(EX_DATAERR, 5296 "invalid rule number %s\n", *av); 5297 memset(&rt, 0, sizeof(rt)); 5298 rt.start_rule = arg; 5299 rt.end_rule = arg; 5300 rt.flags |= IPFW_RCFLAG_RANGE; 5301 if (co.use_set != 0) { 5302 rt.set = co.use_set - 1; 5303 rt.flags |= IPFW_RCFLAG_SET; 5304 } 5305 if (do_range_cmd(optname, &rt) != 0) { 5306 warn("rule %u: setsockopt(IP_FW_X%s)", 5307 arg, name); 5308 failed = EX_UNAVAILABLE; 5309 } else if (rt.new_set == 0) { 5310 printf("Entry %d not found\n", arg); 5311 failed = EX_UNAVAILABLE; 5312 } else if (!co.do_quiet) 5313 printf("Entry %d %s.\n", arg, 5314 optname == IP_FW_XZERO ? 5315 "cleared" : "logging count reset"); 5316 } else { 5317 errx(EX_USAGE, "invalid rule number ``%s''", *av); 5318 } 5319 av++; ac--; 5320 } 5321 if (failed != EX_OK) 5322 exit(failed); 5323 } 5324 5325 void 5326 ipfw_flush(int force) 5327 { 5328 ipfw_range_tlv rt; 5329 5330 if (!force && !co.do_quiet) { /* need to ask user */ 5331 int c; 5332 5333 printf("Are you sure? [yn] "); 5334 fflush(stdout); 5335 do { 5336 c = toupper(getc(stdin)); 5337 while (c != '\n' && getc(stdin) != '\n') 5338 if (feof(stdin)) 5339 return; /* and do not flush */ 5340 } while (c != 'Y' && c != 'N'); 5341 printf("\n"); 5342 if (c == 'N') /* user said no */ 5343 return; 5344 } 5345 if (co.do_pipe) { 5346 dummynet_flush(); 5347 return; 5348 } 5349 /* `ipfw set N flush` - is the same that `ipfw delete set N` */ 5350 memset(&rt, 0, sizeof(rt)); 5351 if (co.use_set != 0) { 5352 rt.set = co.use_set - 1; 5353 rt.flags = IPFW_RCFLAG_SET; 5354 } else 5355 rt.flags = IPFW_RCFLAG_ALL; 5356 if (do_range_cmd(IP_FW_XDEL, &rt) != 0) 5357 err(EX_UNAVAILABLE, "setsockopt(IP_FW_XDEL)"); 5358 if (!co.do_quiet) 5359 printf("Flushed all %s.\n", co.do_pipe ? "pipes" : "rules"); 5360 } 5361 5362 static struct _s_x intcmds[] = { 5363 { "talist", TOK_TALIST }, 5364 { "iflist", TOK_IFLIST }, 5365 { "olist", TOK_OLIST }, 5366 { "vlist", TOK_VLIST }, 5367 { NULL, 0 } 5368 }; 5369 5370 static struct _s_x otypes[] = { 5371 { "EACTION", IPFW_TLV_EACTION }, 5372 { "DYNSTATE", IPFW_TLV_STATE_NAME }, 5373 { NULL, 0 } 5374 }; 5375 5376 static const char* 5377 lookup_eaction_name(ipfw_obj_ntlv *ntlv, int cnt, uint16_t type) 5378 { 5379 const char *name; 5380 int i; 5381 5382 name = NULL; 5383 for (i = 0; i < cnt; i++) { 5384 if (ntlv[i].head.type != IPFW_TLV_EACTION) 5385 continue; 5386 if (IPFW_TLV_EACTION_NAME(ntlv[i].idx) != type) 5387 continue; 5388 name = ntlv[i].name; 5389 break; 5390 } 5391 return (name); 5392 } 5393 5394 static void 5395 ipfw_list_objects(int ac, char *av[]) 5396 { 5397 ipfw_obj_lheader req, *olh; 5398 ipfw_obj_ntlv *ntlv; 5399 const char *name; 5400 size_t sz; 5401 int i; 5402 5403 memset(&req, 0, sizeof(req)); 5404 sz = sizeof(req); 5405 if (do_get3(IP_FW_DUMP_SRVOBJECTS, &req.opheader, &sz) != 0) 5406 if (errno != ENOMEM) 5407 return; 5408 5409 sz = req.size; 5410 if ((olh = calloc(1, sz)) == NULL) 5411 return; 5412 5413 olh->size = sz; 5414 if (do_get3(IP_FW_DUMP_SRVOBJECTS, &olh->opheader, &sz) != 0) { 5415 free(olh); 5416 return; 5417 } 5418 5419 if (olh->count > 0) 5420 printf("Objects list:\n"); 5421 else 5422 printf("There are no objects\n"); 5423 ntlv = (ipfw_obj_ntlv *)(olh + 1); 5424 for (i = 0; i < olh->count; i++) { 5425 name = match_value(otypes, ntlv->head.type); 5426 if (name == NULL) 5427 name = lookup_eaction_name( 5428 (ipfw_obj_ntlv *)(olh + 1), olh->count, 5429 ntlv->head.type); 5430 if (name == NULL) 5431 printf(" kidx: %4d\ttype: %10d\tname: %s\n", 5432 ntlv->idx, ntlv->head.type, ntlv->name); 5433 else 5434 printf(" kidx: %4d\ttype: %10s\tname: %s\n", 5435 ntlv->idx, name, ntlv->name); 5436 ntlv++; 5437 } 5438 free(olh); 5439 } 5440 5441 void 5442 ipfw_internal_handler(int ac, char *av[]) 5443 { 5444 int tcmd; 5445 5446 ac--; av++; 5447 NEED1("internal cmd required"); 5448 5449 if ((tcmd = match_token(intcmds, *av)) == -1) 5450 errx(EX_USAGE, "invalid internal sub-cmd: %s", *av); 5451 5452 switch (tcmd) { 5453 case TOK_IFLIST: 5454 ipfw_list_tifaces(); 5455 break; 5456 case TOK_TALIST: 5457 ipfw_list_ta(ac, av); 5458 break; 5459 case TOK_OLIST: 5460 ipfw_list_objects(ac, av); 5461 break; 5462 case TOK_VLIST: 5463 ipfw_list_values(ac, av); 5464 break; 5465 } 5466 } 5467 5468 static int 5469 ipfw_get_tracked_ifaces(ipfw_obj_lheader **polh) 5470 { 5471 ipfw_obj_lheader req, *olh; 5472 size_t sz; 5473 5474 memset(&req, 0, sizeof(req)); 5475 sz = sizeof(req); 5476 5477 if (do_get3(IP_FW_XIFLIST, &req.opheader, &sz) != 0) { 5478 if (errno != ENOMEM) 5479 return (errno); 5480 } 5481 5482 sz = req.size; 5483 if ((olh = calloc(1, sz)) == NULL) 5484 return (ENOMEM); 5485 5486 olh->size = sz; 5487 if (do_get3(IP_FW_XIFLIST, &olh->opheader, &sz) != 0) { 5488 free(olh); 5489 return (errno); 5490 } 5491 5492 *polh = olh; 5493 return (0); 5494 } 5495 5496 static int 5497 ifinfo_cmp(const void *a, const void *b) 5498 { 5499 ipfw_iface_info *ia, *ib; 5500 5501 ia = (ipfw_iface_info *)a; 5502 ib = (ipfw_iface_info *)b; 5503 5504 return (stringnum_cmp(ia->ifname, ib->ifname)); 5505 } 5506 5507 /* 5508 * Retrieves table list from kernel, 5509 * optionally sorts it and calls requested function for each table. 5510 * Returns 0 on success. 5511 */ 5512 static void 5513 ipfw_list_tifaces() 5514 { 5515 ipfw_obj_lheader *olh; 5516 ipfw_iface_info *info; 5517 int i, error; 5518 5519 if ((error = ipfw_get_tracked_ifaces(&olh)) != 0) 5520 err(EX_OSERR, "Unable to request ipfw tracked interface list"); 5521 5522 5523 qsort(olh + 1, olh->count, olh->objsize, ifinfo_cmp); 5524 5525 info = (ipfw_iface_info *)(olh + 1); 5526 for (i = 0; i < olh->count; i++) { 5527 if (info->flags & IPFW_IFFLAG_RESOLVED) 5528 printf("%s ifindex: %d refcount: %u changes: %u\n", 5529 info->ifname, info->ifindex, info->refcnt, 5530 info->gencnt); 5531 else 5532 printf("%s ifindex: unresolved refcount: %u changes: %u\n", 5533 info->ifname, info->refcnt, info->gencnt); 5534 info = (ipfw_iface_info *)((caddr_t)info + olh->objsize); 5535 } 5536 5537 free(olh); 5538 } 5539 5540 5541 5542 5543