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(in_addr_t), 1260 AF_INET); 1261 if (he != NULL) /* resolved to name */ 1262 bprintf(bp, "%s", he->h_name); 1263 else if (mb == 0) /* any */ 1264 bprintf(bp, "any"); 1265 else { /* numeric IP followed by some kind of mask */ 1266 ia = (struct in_addr *)&a[0]; 1267 bprintf(bp, "%s", inet_ntoa(*ia)); 1268 if (mb < 0) { 1269 ia = (struct in_addr *)&a[1]; 1270 bprintf(bp, ":%s", inet_ntoa(*ia)); 1271 } else if (mb < 32) 1272 bprintf(bp, "/%d", mb); 1273 } 1274 if (len > 1) 1275 bprintf(bp, ","); 1276 } 1277 } 1278 1279 /* 1280 * prints a MAC address/mask pair 1281 */ 1282 static void 1283 format_mac(struct buf_pr *bp, uint8_t *addr, uint8_t *mask) 1284 { 1285 int l = contigmask(mask, 48); 1286 1287 if (l == 0) 1288 bprintf(bp, " any"); 1289 else { 1290 bprintf(bp, " %02x:%02x:%02x:%02x:%02x:%02x", 1291 addr[0], addr[1], addr[2], addr[3], addr[4], addr[5]); 1292 if (l == -1) 1293 bprintf(bp, "&%02x:%02x:%02x:%02x:%02x:%02x", 1294 mask[0], mask[1], mask[2], 1295 mask[3], mask[4], mask[5]); 1296 else if (l < 48) 1297 bprintf(bp, "/%d", l); 1298 } 1299 } 1300 1301 static void 1302 print_mac(struct buf_pr *bp, ipfw_insn_mac *mac) 1303 { 1304 1305 bprintf(bp, " MAC"); 1306 format_mac(bp, mac->addr, mac->mask); 1307 format_mac(bp, mac->addr + 6, mac->mask + 6); 1308 } 1309 1310 static void 1311 fill_icmptypes(ipfw_insn_u32 *cmd, char *av) 1312 { 1313 uint8_t type; 1314 1315 cmd->d[0] = 0; 1316 while (*av) { 1317 if (*av == ',') 1318 av++; 1319 1320 type = strtoul(av, &av, 0); 1321 1322 if (*av != ',' && *av != '\0') 1323 errx(EX_DATAERR, "invalid ICMP type"); 1324 1325 if (type > 31) 1326 errx(EX_DATAERR, "ICMP type out of range"); 1327 1328 cmd->d[0] |= 1 << type; 1329 } 1330 cmd->o.opcode = O_ICMPTYPE; 1331 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32); 1332 } 1333 1334 static void 1335 print_icmptypes(struct buf_pr *bp, ipfw_insn_u32 *cmd) 1336 { 1337 int i; 1338 char sep= ' '; 1339 1340 bprintf(bp, " icmptypes"); 1341 for (i = 0; i < 32; i++) { 1342 if ( (cmd->d[0] & (1 << (i))) == 0) 1343 continue; 1344 bprintf(bp, "%c%d", sep, i); 1345 sep = ','; 1346 } 1347 } 1348 1349 static void 1350 print_dscp(struct buf_pr *bp, ipfw_insn_u32 *cmd) 1351 { 1352 int i = 0; 1353 uint32_t *v; 1354 char sep= ' '; 1355 const char *code; 1356 1357 bprintf(bp, " dscp"); 1358 v = cmd->d; 1359 while (i < 64) { 1360 if (*v & (1 << i)) { 1361 if ((code = match_value(f_ipdscp, i)) != NULL) 1362 bprintf(bp, "%c%s", sep, code); 1363 else 1364 bprintf(bp, "%c%d", sep, i); 1365 sep = ','; 1366 } 1367 1368 if ((++i % 32) == 0) 1369 v++; 1370 } 1371 } 1372 1373 #define insntod(cmd, type) ((ipfw_insn_ ## type *)(cmd)) 1374 struct show_state { 1375 struct ip_fw_rule *rule; 1376 const ipfw_insn *eaction; 1377 uint8_t *printed; 1378 int flags; 1379 #define HAVE_PROTO 0x0001 1380 #define HAVE_SRCIP 0x0002 1381 #define HAVE_DSTIP 0x0004 1382 #define HAVE_PROBE_STATE 0x0008 1383 int proto; 1384 int or_block; 1385 }; 1386 1387 static int 1388 init_show_state(struct show_state *state, struct ip_fw_rule *rule) 1389 { 1390 1391 state->printed = calloc(rule->cmd_len, sizeof(uint8_t)); 1392 if (state->printed == NULL) 1393 return (ENOMEM); 1394 state->rule = rule; 1395 state->eaction = NULL; 1396 state->flags = 0; 1397 state->proto = 0; 1398 state->or_block = 0; 1399 return (0); 1400 } 1401 1402 static void 1403 free_show_state(struct show_state *state) 1404 { 1405 1406 free(state->printed); 1407 } 1408 1409 static uint8_t 1410 is_printed_opcode(struct show_state *state, const ipfw_insn *cmd) 1411 { 1412 1413 return (state->printed[cmd - state->rule->cmd]); 1414 } 1415 1416 static void 1417 mark_printed(struct show_state *state, const ipfw_insn *cmd) 1418 { 1419 1420 state->printed[cmd - state->rule->cmd] = 1; 1421 } 1422 1423 static void 1424 print_limit_mask(struct buf_pr *bp, const ipfw_insn_limit *limit) 1425 { 1426 struct _s_x *p = limit_masks; 1427 char const *comma = " "; 1428 uint8_t x; 1429 1430 for (x = limit->limit_mask; p->x != 0; p++) { 1431 if ((x & p->x) == p->x) { 1432 x &= ~p->x; 1433 bprintf(bp, "%s%s", comma, p->s); 1434 comma = ","; 1435 } 1436 } 1437 bprint_uint_arg(bp, " ", limit->conn_limit); 1438 } 1439 1440 static int 1441 print_instruction(struct buf_pr *bp, const struct format_opts *fo, 1442 struct show_state *state, ipfw_insn *cmd) 1443 { 1444 struct protoent *pe; 1445 struct passwd *pwd; 1446 struct group *grp; 1447 const char *s; 1448 double d; 1449 1450 if (is_printed_opcode(state, cmd)) 1451 return (0); 1452 if ((cmd->len & F_OR) != 0 && state->or_block == 0) 1453 bprintf(bp, " {"); 1454 if (cmd->opcode != O_IN && (cmd->len & F_NOT) != 0) 1455 bprintf(bp, " not"); 1456 1457 switch (cmd->opcode) { 1458 case O_PROB: 1459 d = 1.0 * insntod(cmd, u32)->d[0] / 0x7fffffff; 1460 bprintf(bp, "prob %f ", d); 1461 break; 1462 case O_PROBE_STATE: /* no need to print anything here */ 1463 state->flags |= HAVE_PROBE_STATE; 1464 break; 1465 case O_IP_SRC: 1466 case O_IP_SRC_LOOKUP: 1467 case O_IP_SRC_MASK: 1468 case O_IP_SRC_ME: 1469 case O_IP_SRC_SET: 1470 if (state->flags & HAVE_SRCIP) 1471 bprintf(bp, " src-ip"); 1472 print_ip(bp, fo, insntod(cmd, ip)); 1473 break; 1474 case O_IP_DST: 1475 case O_IP_DST_LOOKUP: 1476 case O_IP_DST_MASK: 1477 case O_IP_DST_ME: 1478 case O_IP_DST_SET: 1479 if (state->flags & HAVE_DSTIP) 1480 bprintf(bp, " dst-ip"); 1481 print_ip(bp, fo, insntod(cmd, ip)); 1482 break; 1483 case O_IP6_SRC: 1484 case O_IP6_SRC_MASK: 1485 case O_IP6_SRC_ME: 1486 if (state->flags & HAVE_SRCIP) 1487 bprintf(bp, " src-ip6"); 1488 print_ip6(bp, insntod(cmd, ip6)); 1489 break; 1490 case O_IP6_DST: 1491 case O_IP6_DST_MASK: 1492 case O_IP6_DST_ME: 1493 if (state->flags & HAVE_DSTIP) 1494 bprintf(bp, " dst-ip6"); 1495 print_ip6(bp, insntod(cmd, ip6)); 1496 break; 1497 case O_FLOW6ID: 1498 print_flow6id(bp, insntod(cmd, u32)); 1499 break; 1500 case O_IP_DSTPORT: 1501 case O_IP_SRCPORT: 1502 print_newports(bp, insntod(cmd, u16), state->proto, 1503 (state->flags & (HAVE_SRCIP | HAVE_DSTIP)) == 1504 (HAVE_SRCIP | HAVE_DSTIP) ? cmd->opcode: 0); 1505 break; 1506 case O_PROTO: 1507 pe = getprotobynumber(cmd->arg1); 1508 if (state->flags & HAVE_PROTO) 1509 bprintf(bp, " proto"); 1510 if (pe != NULL) 1511 bprintf(bp, " %s", pe->p_name); 1512 else 1513 bprintf(bp, " %u", cmd->arg1); 1514 state->proto = cmd->arg1; 1515 break; 1516 case O_MACADDR2: 1517 print_mac(bp, insntod(cmd, mac)); 1518 break; 1519 case O_MAC_TYPE: 1520 print_newports(bp, insntod(cmd, u16), 1521 IPPROTO_ETHERTYPE, cmd->opcode); 1522 break; 1523 case O_FRAG: 1524 bprintf(bp, " frag"); 1525 break; 1526 case O_FIB: 1527 bprintf(bp, " fib %u", cmd->arg1); 1528 break; 1529 case O_SOCKARG: 1530 bprintf(bp, " sockarg"); 1531 break; 1532 case O_IN: 1533 bprintf(bp, cmd->len & F_NOT ? " out" : " in"); 1534 break; 1535 case O_DIVERTED: 1536 switch (cmd->arg1) { 1537 case 3: 1538 bprintf(bp, " diverted"); 1539 break; 1540 case 2: 1541 bprintf(bp, " diverted-output"); 1542 break; 1543 case 1: 1544 bprintf(bp, " diverted-loopback"); 1545 break; 1546 default: 1547 bprintf(bp, " diverted-?<%u>", cmd->arg1); 1548 break; 1549 } 1550 break; 1551 case O_LAYER2: 1552 bprintf(bp, " layer2"); 1553 break; 1554 case O_XMIT: 1555 case O_RECV: 1556 case O_VIA: 1557 if (cmd->opcode == O_XMIT) 1558 s = "xmit"; 1559 else if (cmd->opcode == O_RECV) 1560 s = "recv"; 1561 else /* if (cmd->opcode == O_VIA) */ 1562 s = "via"; 1563 switch (insntod(cmd, if)->name[0]) { 1564 case '\0': 1565 bprintf(bp, " %s %s", s, 1566 inet_ntoa(insntod(cmd, if)->p.ip)); 1567 break; 1568 case '\1': 1569 bprintf(bp, " %s table(%s)", s, 1570 table_search_ctlv(fo->tstate, 1571 insntod(cmd, if)->p.kidx)); 1572 break; 1573 default: 1574 bprintf(bp, " %s %s", s, 1575 insntod(cmd, if)->name); 1576 } 1577 break; 1578 case O_IP_FLOW_LOOKUP: 1579 s = table_search_ctlv(fo->tstate, cmd->arg1); 1580 bprintf(bp, " flow table(%s", s); 1581 if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_u32)) 1582 bprintf(bp, ",%u", insntod(cmd, u32)->d[0]); 1583 bprintf(bp, ")"); 1584 break; 1585 case O_IPID: 1586 case O_IPTTL: 1587 case O_IPLEN: 1588 case O_TCPDATALEN: 1589 case O_TCPWIN: 1590 if (F_LEN(cmd) == 1) { 1591 switch (cmd->opcode) { 1592 case O_IPID: 1593 s = "ipid"; 1594 break; 1595 case O_IPTTL: 1596 s = "ipttl"; 1597 break; 1598 case O_IPLEN: 1599 s = "iplen"; 1600 break; 1601 case O_TCPDATALEN: 1602 s = "tcpdatalen"; 1603 break; 1604 case O_TCPWIN: 1605 s = "tcpwin"; 1606 break; 1607 } 1608 bprintf(bp, " %s %u", s, cmd->arg1); 1609 } else 1610 print_newports(bp, insntod(cmd, u16), 0, 1611 cmd->opcode); 1612 break; 1613 case O_IPVER: 1614 bprintf(bp, " ipver %u", cmd->arg1); 1615 break; 1616 case O_IPPRECEDENCE: 1617 bprintf(bp, " ipprecedence %u", cmd->arg1 >> 5); 1618 break; 1619 case O_DSCP: 1620 print_dscp(bp, insntod(cmd, u32)); 1621 break; 1622 case O_IPOPT: 1623 print_flags(bp, "ipoptions", cmd, f_ipopts); 1624 break; 1625 case O_IPTOS: 1626 print_flags(bp, "iptos", cmd, f_iptos); 1627 break; 1628 case O_ICMPTYPE: 1629 print_icmptypes(bp, insntod(cmd, u32)); 1630 break; 1631 case O_ESTAB: 1632 bprintf(bp, " established"); 1633 break; 1634 case O_TCPFLAGS: 1635 print_flags(bp, "tcpflags", cmd, f_tcpflags); 1636 break; 1637 case O_TCPOPTS: 1638 print_flags(bp, "tcpoptions", cmd, f_tcpopts); 1639 break; 1640 case O_TCPACK: 1641 bprintf(bp, " tcpack %d", 1642 ntohl(insntod(cmd, u32)->d[0])); 1643 break; 1644 case O_TCPSEQ: 1645 bprintf(bp, " tcpseq %d", 1646 ntohl(insntod(cmd, u32)->d[0])); 1647 break; 1648 case O_UID: 1649 pwd = getpwuid(insntod(cmd, u32)->d[0]); 1650 if (pwd != NULL) 1651 bprintf(bp, " uid %s", pwd->pw_name); 1652 else 1653 bprintf(bp, " uid %u", 1654 insntod(cmd, u32)->d[0]); 1655 break; 1656 case O_GID: 1657 grp = getgrgid(insntod(cmd, u32)->d[0]); 1658 if (grp != NULL) 1659 bprintf(bp, " gid %s", grp->gr_name); 1660 else 1661 bprintf(bp, " gid %u", 1662 insntod(cmd, u32)->d[0]); 1663 break; 1664 case O_JAIL: 1665 bprintf(bp, " jail %d", insntod(cmd, u32)->d[0]); 1666 break; 1667 case O_VERREVPATH: 1668 bprintf(bp, " verrevpath"); 1669 break; 1670 case O_VERSRCREACH: 1671 bprintf(bp, " versrcreach"); 1672 break; 1673 case O_ANTISPOOF: 1674 bprintf(bp, " antispoof"); 1675 break; 1676 case O_IPSEC: 1677 bprintf(bp, " ipsec"); 1678 break; 1679 case O_NOP: 1680 bprintf(bp, " // %s", (char *)(cmd + 1)); 1681 break; 1682 case O_KEEP_STATE: 1683 if (state->flags & HAVE_PROBE_STATE) 1684 bprintf(bp, " keep-state"); 1685 else 1686 bprintf(bp, " record-state"); 1687 bprintf(bp, " :%s", 1688 object_search_ctlv(fo->tstate, cmd->arg1, 1689 IPFW_TLV_STATE_NAME)); 1690 break; 1691 case O_LIMIT: 1692 if (state->flags & HAVE_PROBE_STATE) 1693 bprintf(bp, " limit"); 1694 else 1695 bprintf(bp, " set-limit"); 1696 print_limit_mask(bp, insntod(cmd, limit)); 1697 bprintf(bp, " :%s", 1698 object_search_ctlv(fo->tstate, cmd->arg1, 1699 IPFW_TLV_STATE_NAME)); 1700 break; 1701 case O_IP6: 1702 bprintf(bp, " ip6"); 1703 break; 1704 case O_IP4: 1705 bprintf(bp, " ip4"); 1706 break; 1707 case O_ICMP6TYPE: 1708 print_icmp6types(bp, insntod(cmd, u32)); 1709 break; 1710 case O_EXT_HDR: 1711 print_ext6hdr(bp, cmd); 1712 break; 1713 case O_TAGGED: 1714 if (F_LEN(cmd) == 1) 1715 bprint_uint_arg(bp, " tagged ", cmd->arg1); 1716 else 1717 print_newports(bp, insntod(cmd, u16), 1718 0, O_TAGGED); 1719 break; 1720 case O_SKIP_ACTION: 1721 bprintf(bp, " defer-immediate-action"); 1722 break; 1723 default: 1724 bprintf(bp, " [opcode %d len %d]", cmd->opcode, 1725 cmd->len); 1726 } 1727 if (cmd->len & F_OR) { 1728 bprintf(bp, " or"); 1729 state->or_block = 1; 1730 } else if (state->or_block != 0) { 1731 bprintf(bp, " }"); 1732 state->or_block = 0; 1733 } 1734 mark_printed(state, cmd); 1735 1736 return (1); 1737 } 1738 1739 static ipfw_insn * 1740 print_opcode(struct buf_pr *bp, struct format_opts *fo, 1741 struct show_state *state, int opcode) 1742 { 1743 ipfw_insn *cmd; 1744 int l; 1745 1746 for (l = state->rule->act_ofs, cmd = state->rule->cmd; 1747 l > 0; l -= F_LEN(cmd), cmd += F_LEN(cmd)) { 1748 /* We use zero opcode to print the rest of options */ 1749 if (opcode >= 0 && cmd->opcode != opcode) 1750 continue; 1751 /* 1752 * Skip O_NOP, when we printing the rest 1753 * of options, it will be handled separately. 1754 */ 1755 if (cmd->opcode == O_NOP && opcode != O_NOP) 1756 continue; 1757 if (!print_instruction(bp, fo, state, cmd)) 1758 continue; 1759 return (cmd); 1760 } 1761 return (NULL); 1762 } 1763 1764 static void 1765 print_fwd(struct buf_pr *bp, const ipfw_insn *cmd) 1766 { 1767 char buf[INET6_ADDRSTRLEN + IF_NAMESIZE + 2]; 1768 ipfw_insn_sa6 *sa6; 1769 ipfw_insn_sa *sa; 1770 uint16_t port; 1771 1772 if (cmd->opcode == O_FORWARD_IP) { 1773 sa = insntod(cmd, sa); 1774 port = sa->sa.sin_port; 1775 if (sa->sa.sin_addr.s_addr == INADDR_ANY) 1776 bprintf(bp, "fwd tablearg"); 1777 else 1778 bprintf(bp, "fwd %s", inet_ntoa(sa->sa.sin_addr)); 1779 } else { 1780 sa6 = insntod(cmd, sa6); 1781 port = sa6->sa.sin6_port; 1782 bprintf(bp, "fwd "); 1783 if (getnameinfo((const struct sockaddr *)&sa6->sa, 1784 sizeof(struct sockaddr_in6), buf, sizeof(buf), NULL, 0, 1785 NI_NUMERICHOST) == 0) 1786 bprintf(bp, "%s", buf); 1787 } 1788 if (port != 0) 1789 bprintf(bp, ",%u", port); 1790 } 1791 1792 static int 1793 print_action_instruction(struct buf_pr *bp, const struct format_opts *fo, 1794 struct show_state *state, const ipfw_insn *cmd) 1795 { 1796 const char *s; 1797 1798 if (is_printed_opcode(state, cmd)) 1799 return (0); 1800 switch (cmd->opcode) { 1801 case O_CHECK_STATE: 1802 bprintf(bp, "check-state"); 1803 if (cmd->arg1 != 0) 1804 s = object_search_ctlv(fo->tstate, cmd->arg1, 1805 IPFW_TLV_STATE_NAME); 1806 else 1807 s = NULL; 1808 bprintf(bp, " :%s", s ? s: "any"); 1809 break; 1810 case O_ACCEPT: 1811 bprintf(bp, "allow"); 1812 break; 1813 case O_COUNT: 1814 bprintf(bp, "count"); 1815 break; 1816 case O_DENY: 1817 bprintf(bp, "deny"); 1818 break; 1819 case O_REJECT: 1820 if (cmd->arg1 == ICMP_REJECT_RST) 1821 bprintf(bp, "reset"); 1822 else if (cmd->arg1 == ICMP_REJECT_ABORT) 1823 bprintf(bp, "abort"); 1824 else if (cmd->arg1 == ICMP_UNREACH_HOST) 1825 bprintf(bp, "reject"); 1826 else 1827 print_reject_code(bp, cmd->arg1); 1828 break; 1829 case O_UNREACH6: 1830 if (cmd->arg1 == ICMP6_UNREACH_RST) 1831 bprintf(bp, "reset6"); 1832 else if (cmd->arg1 == ICMP6_UNREACH_ABORT) 1833 bprintf(bp, "abort6"); 1834 else 1835 print_unreach6_code(bp, cmd->arg1); 1836 break; 1837 case O_SKIPTO: 1838 bprint_uint_arg(bp, "skipto ", cmd->arg1); 1839 break; 1840 case O_PIPE: 1841 bprint_uint_arg(bp, "pipe ", cmd->arg1); 1842 break; 1843 case O_QUEUE: 1844 bprint_uint_arg(bp, "queue ", cmd->arg1); 1845 break; 1846 case O_DIVERT: 1847 bprint_uint_arg(bp, "divert ", cmd->arg1); 1848 break; 1849 case O_TEE: 1850 bprint_uint_arg(bp, "tee ", cmd->arg1); 1851 break; 1852 case O_NETGRAPH: 1853 bprint_uint_arg(bp, "netgraph ", cmd->arg1); 1854 break; 1855 case O_NGTEE: 1856 bprint_uint_arg(bp, "ngtee ", cmd->arg1); 1857 break; 1858 case O_FORWARD_IP: 1859 case O_FORWARD_IP6: 1860 print_fwd(bp, cmd); 1861 break; 1862 case O_LOG: 1863 if (insntod(cmd, log)->max_log > 0) 1864 bprintf(bp, " log logamount %d", 1865 insntod(cmd, log)->max_log); 1866 else 1867 bprintf(bp, " log"); 1868 break; 1869 case O_ALTQ: 1870 #ifndef NO_ALTQ 1871 print_altq_cmd(bp, insntod(cmd, altq)); 1872 #endif 1873 break; 1874 case O_TAG: 1875 bprint_uint_arg(bp, cmd->len & F_NOT ? " untag ": 1876 " tag ", cmd->arg1); 1877 break; 1878 case O_NAT: 1879 if (cmd->arg1 != IP_FW_NAT44_GLOBAL) 1880 bprint_uint_arg(bp, "nat ", cmd->arg1); 1881 else 1882 bprintf(bp, "nat global"); 1883 break; 1884 case O_SETFIB: 1885 if (cmd->arg1 == IP_FW_TARG) 1886 bprint_uint_arg(bp, "setfib ", cmd->arg1); 1887 else 1888 bprintf(bp, "setfib %u", cmd->arg1 & 0x7FFF); 1889 break; 1890 case O_EXTERNAL_ACTION: 1891 /* 1892 * The external action can consists of two following 1893 * each other opcodes - O_EXTERNAL_ACTION and 1894 * O_EXTERNAL_INSTANCE. The first contains the ID of 1895 * name of external action. The second contains the ID 1896 * of name of external action instance. 1897 * NOTE: in case when external action has no named 1898 * instances support, the second opcode isn't needed. 1899 */ 1900 state->eaction = cmd; 1901 s = object_search_ctlv(fo->tstate, cmd->arg1, 1902 IPFW_TLV_EACTION); 1903 if (match_token(rule_eactions, s) != -1) 1904 bprintf(bp, "%s", s); 1905 else 1906 bprintf(bp, "eaction %s", s); 1907 break; 1908 case O_EXTERNAL_INSTANCE: 1909 if (state->eaction == NULL) 1910 break; 1911 /* 1912 * XXX: we need to teach ipfw(9) to rewrite opcodes 1913 * in the user buffer on rule addition. When we add 1914 * the rule, we specify zero TLV type for 1915 * O_EXTERNAL_INSTANCE object. To show correct 1916 * rule after `ipfw add` we need to search instance 1917 * name with zero type. But when we do `ipfw show` 1918 * we calculate TLV type using IPFW_TLV_EACTION_NAME() 1919 * macro. 1920 */ 1921 s = object_search_ctlv(fo->tstate, cmd->arg1, 0); 1922 if (s == NULL) 1923 s = object_search_ctlv(fo->tstate, 1924 cmd->arg1, IPFW_TLV_EACTION_NAME( 1925 state->eaction->arg1)); 1926 bprintf(bp, " %s", s); 1927 break; 1928 case O_EXTERNAL_DATA: 1929 if (state->eaction == NULL) 1930 break; 1931 /* 1932 * Currently we support data formatting only for 1933 * external data with datalen u16. For unknown data 1934 * print its size in bytes. 1935 */ 1936 if (cmd->len == F_INSN_SIZE(ipfw_insn)) 1937 bprintf(bp, " %u", cmd->arg1); 1938 else 1939 bprintf(bp, " %ubytes", 1940 cmd->len * sizeof(uint32_t)); 1941 break; 1942 case O_SETDSCP: 1943 if (cmd->arg1 == IP_FW_TARG) { 1944 bprintf(bp, "setdscp tablearg"); 1945 break; 1946 } 1947 s = match_value(f_ipdscp, cmd->arg1 & 0x3F); 1948 if (s != NULL) 1949 bprintf(bp, "setdscp %s", s); 1950 else 1951 bprintf(bp, "setdscp %u", cmd->arg1 & 0x3F); 1952 break; 1953 case O_REASS: 1954 bprintf(bp, "reass"); 1955 break; 1956 case O_CALLRETURN: 1957 if (cmd->len & F_NOT) 1958 bprintf(bp, "return"); 1959 else 1960 bprint_uint_arg(bp, "call ", cmd->arg1); 1961 break; 1962 default: 1963 bprintf(bp, "** unrecognized action %d len %d ", 1964 cmd->opcode, cmd->len); 1965 } 1966 mark_printed(state, cmd); 1967 1968 return (1); 1969 } 1970 1971 1972 static ipfw_insn * 1973 print_action(struct buf_pr *bp, struct format_opts *fo, 1974 struct show_state *state, uint8_t opcode) 1975 { 1976 ipfw_insn *cmd; 1977 int l; 1978 1979 for (l = state->rule->cmd_len - state->rule->act_ofs, 1980 cmd = ACTION_PTR(state->rule); l > 0; 1981 l -= F_LEN(cmd), cmd += F_LEN(cmd)) { 1982 if (cmd->opcode != opcode) 1983 continue; 1984 if (!print_action_instruction(bp, fo, state, cmd)) 1985 continue; 1986 return (cmd); 1987 } 1988 return (NULL); 1989 } 1990 1991 static void 1992 print_proto(struct buf_pr *bp, struct format_opts *fo, 1993 struct show_state *state) 1994 { 1995 ipfw_insn *cmd; 1996 int l, proto, ip4, ip6; 1997 1998 /* Count all O_PROTO, O_IP4, O_IP6 instructions. */ 1999 proto = ip4 = ip6 = 0; 2000 for (l = state->rule->act_ofs, cmd = state->rule->cmd; 2001 l > 0; l -= F_LEN(cmd), cmd += F_LEN(cmd)) { 2002 switch (cmd->opcode) { 2003 case O_PROTO: 2004 proto++; 2005 break; 2006 case O_IP4: 2007 ip4 = 1; 2008 if (cmd->len & F_OR) 2009 ip4++; 2010 break; 2011 case O_IP6: 2012 ip6 = 1; 2013 if (cmd->len & F_OR) 2014 ip6++; 2015 break; 2016 default: 2017 continue; 2018 } 2019 } 2020 if (proto == 0 && ip4 == 0 && ip6 == 0) { 2021 state->proto = IPPROTO_IP; 2022 state->flags |= HAVE_PROTO; 2023 bprintf(bp, " ip"); 2024 return; 2025 } 2026 /* To handle the case { ip4 or ip6 }, print opcode with F_OR first */ 2027 cmd = NULL; 2028 if (ip4 || ip6) 2029 cmd = print_opcode(bp, fo, state, ip4 > ip6 ? O_IP4: O_IP6); 2030 if (cmd != NULL && (cmd->len & F_OR)) 2031 cmd = print_opcode(bp, fo, state, ip4 > ip6 ? O_IP6: O_IP4); 2032 if (cmd == NULL || (cmd->len & F_OR)) 2033 for (l = proto; l > 0; l--) { 2034 cmd = print_opcode(bp, fo, state, O_PROTO); 2035 if (cmd == NULL || (cmd->len & F_OR) == 0) 2036 break; 2037 } 2038 /* Initialize proto, it is used by print_newports() */ 2039 state->flags |= HAVE_PROTO; 2040 if (state->proto == 0 && ip6 != 0) 2041 state->proto = IPPROTO_IPV6; 2042 } 2043 2044 static int 2045 match_opcode(int opcode, const int opcodes[], size_t nops) 2046 { 2047 int i; 2048 2049 for (i = 0; i < nops; i++) 2050 if (opcode == opcodes[i]) 2051 return (1); 2052 return (0); 2053 } 2054 2055 static void 2056 print_address(struct buf_pr *bp, struct format_opts *fo, 2057 struct show_state *state, const int opcodes[], size_t nops, int portop, 2058 int flag) 2059 { 2060 ipfw_insn *cmd; 2061 int count, l, portcnt, pf; 2062 2063 count = portcnt = 0; 2064 for (l = state->rule->act_ofs, cmd = state->rule->cmd; 2065 l > 0; l -= F_LEN(cmd), cmd += F_LEN(cmd)) { 2066 if (match_opcode(cmd->opcode, opcodes, nops)) 2067 count++; 2068 else if (cmd->opcode == portop) 2069 portcnt++; 2070 } 2071 if (count == 0) 2072 bprintf(bp, " any"); 2073 for (l = state->rule->act_ofs, cmd = state->rule->cmd; 2074 l > 0 && count > 0; l -= F_LEN(cmd), cmd += F_LEN(cmd)) { 2075 if (!match_opcode(cmd->opcode, opcodes, nops)) 2076 continue; 2077 print_instruction(bp, fo, state, cmd); 2078 if ((cmd->len & F_OR) == 0) 2079 break; 2080 count--; 2081 } 2082 /* 2083 * If several O_IP_?PORT opcodes specified, leave them to the 2084 * options section. 2085 */ 2086 if (portcnt == 1) { 2087 for (l = state->rule->act_ofs, cmd = state->rule->cmd, pf = 0; 2088 l > 0; l -= F_LEN(cmd), cmd += F_LEN(cmd)) { 2089 if (cmd->opcode != portop) { 2090 pf = (cmd->len & F_OR); 2091 continue; 2092 } 2093 /* Print opcode iff it is not in OR block. */ 2094 if (pf == 0 && (cmd->len & F_OR) == 0) 2095 print_instruction(bp, fo, state, cmd); 2096 break; 2097 } 2098 } 2099 state->flags |= flag; 2100 } 2101 2102 static const int action_opcodes[] = { 2103 O_CHECK_STATE, O_ACCEPT, O_COUNT, O_DENY, O_REJECT, 2104 O_UNREACH6, O_SKIPTO, O_PIPE, O_QUEUE, O_DIVERT, O_TEE, 2105 O_NETGRAPH, O_NGTEE, O_FORWARD_IP, O_FORWARD_IP6, O_NAT, 2106 O_SETFIB, O_SETDSCP, O_REASS, O_CALLRETURN, 2107 /* keep the following opcodes at the end of the list */ 2108 O_EXTERNAL_ACTION, O_EXTERNAL_INSTANCE, O_EXTERNAL_DATA 2109 }; 2110 2111 static const int modifier_opcodes[] = { 2112 O_LOG, O_ALTQ, O_TAG 2113 }; 2114 2115 static const int src_opcodes[] = { 2116 O_IP_SRC, O_IP_SRC_LOOKUP, O_IP_SRC_MASK, O_IP_SRC_ME, 2117 O_IP_SRC_SET, O_IP6_SRC, O_IP6_SRC_MASK, O_IP6_SRC_ME 2118 }; 2119 2120 static const int dst_opcodes[] = { 2121 O_IP_DST, O_IP_DST_LOOKUP, O_IP_DST_MASK, O_IP_DST_ME, 2122 O_IP_DST_SET, O_IP6_DST, O_IP6_DST_MASK, O_IP6_DST_ME 2123 }; 2124 2125 static void 2126 show_static_rule(struct cmdline_opts *co, struct format_opts *fo, 2127 struct buf_pr *bp, struct ip_fw_rule *rule, struct ip_fw_bcounter *cntr) 2128 { 2129 struct show_state state; 2130 ipfw_insn *cmd; 2131 static int twidth = 0; 2132 int i; 2133 2134 /* Print # DISABLED or skip the rule */ 2135 if ((fo->set_mask & (1 << rule->set)) == 0) { 2136 /* disabled mask */ 2137 if (!co->show_sets) 2138 return; 2139 else 2140 bprintf(bp, "# DISABLED "); 2141 } 2142 if (init_show_state(&state, rule) != 0) { 2143 warn("init_show_state() failed"); 2144 return; 2145 } 2146 bprintf(bp, "%05u ", rule->rulenum); 2147 2148 /* Print counters if enabled */ 2149 if (fo->pcwidth > 0 || fo->bcwidth > 0) { 2150 pr_u64(bp, &cntr->pcnt, fo->pcwidth); 2151 pr_u64(bp, &cntr->bcnt, fo->bcwidth); 2152 } 2153 2154 /* Print timestamp */ 2155 if (co->do_time == TIMESTAMP_NUMERIC) 2156 bprintf(bp, "%10u ", cntr->timestamp); 2157 else if (co->do_time == TIMESTAMP_STRING) { 2158 char timestr[30]; 2159 time_t t = (time_t)0; 2160 2161 if (twidth == 0) { 2162 strcpy(timestr, ctime(&t)); 2163 *strchr(timestr, '\n') = '\0'; 2164 twidth = strlen(timestr); 2165 } 2166 if (cntr->timestamp > 0) { 2167 t = _long_to_time(cntr->timestamp); 2168 2169 strcpy(timestr, ctime(&t)); 2170 *strchr(timestr, '\n') = '\0'; 2171 bprintf(bp, "%s ", timestr); 2172 } else { 2173 bprintf(bp, "%*s", twidth, " "); 2174 } 2175 } 2176 2177 /* Print set number */ 2178 if (co->show_sets) 2179 bprintf(bp, "set %d ", rule->set); 2180 2181 /* Print the optional "match probability" */ 2182 cmd = print_opcode(bp, fo, &state, O_PROB); 2183 /* Print rule action */ 2184 for (i = 0; i < nitems(action_opcodes); i++) { 2185 cmd = print_action(bp, fo, &state, action_opcodes[i]); 2186 if (cmd == NULL) 2187 continue; 2188 /* Handle special cases */ 2189 switch (cmd->opcode) { 2190 case O_CHECK_STATE: 2191 goto end; 2192 case O_EXTERNAL_ACTION: 2193 case O_EXTERNAL_INSTANCE: 2194 /* External action can have several instructions */ 2195 continue; 2196 } 2197 break; 2198 } 2199 /* Print rule modifiers */ 2200 for (i = 0; i < nitems(modifier_opcodes); i++) 2201 print_action(bp, fo, &state, modifier_opcodes[i]); 2202 /* 2203 * Print rule body 2204 */ 2205 if (co->comment_only != 0) 2206 goto end; 2207 2208 if (rule->flags & IPFW_RULE_JUSTOPTS) { 2209 state.flags |= HAVE_PROTO | HAVE_SRCIP | HAVE_DSTIP; 2210 goto justopts; 2211 } 2212 2213 print_proto(bp, fo, &state); 2214 2215 /* Print source */ 2216 bprintf(bp, " from"); 2217 print_address(bp, fo, &state, src_opcodes, nitems(src_opcodes), 2218 O_IP_SRCPORT, HAVE_SRCIP); 2219 2220 /* Print destination */ 2221 bprintf(bp, " to"); 2222 print_address(bp, fo, &state, dst_opcodes, nitems(dst_opcodes), 2223 O_IP_DSTPORT, HAVE_DSTIP); 2224 2225 justopts: 2226 /* Print the rest of options */ 2227 while (print_opcode(bp, fo, &state, -1)) 2228 ; 2229 end: 2230 /* Print comment at the end */ 2231 cmd = print_opcode(bp, fo, &state, O_NOP); 2232 if (co->comment_only != 0 && cmd == NULL) 2233 bprintf(bp, " // ..."); 2234 bprintf(bp, "\n"); 2235 free_show_state(&state); 2236 } 2237 2238 static void 2239 show_dyn_state(struct cmdline_opts *co, struct format_opts *fo, 2240 struct buf_pr *bp, ipfw_dyn_rule *d) 2241 { 2242 struct protoent *pe; 2243 struct in_addr a; 2244 uint16_t rulenum; 2245 char buf[INET6_ADDRSTRLEN]; 2246 2247 if (d->expire == 0 && d->dyn_type != O_LIMIT_PARENT) 2248 return; 2249 2250 bcopy(&d->rule, &rulenum, sizeof(rulenum)); 2251 bprintf(bp, "%05d", rulenum); 2252 if (fo->pcwidth > 0 || fo->bcwidth > 0) { 2253 bprintf(bp, " "); 2254 pr_u64(bp, &d->pcnt, fo->pcwidth); 2255 pr_u64(bp, &d->bcnt, fo->bcwidth); 2256 bprintf(bp, "(%ds)", d->expire); 2257 } 2258 switch (d->dyn_type) { 2259 case O_LIMIT_PARENT: 2260 bprintf(bp, " PARENT %d", d->count); 2261 break; 2262 case O_LIMIT: 2263 bprintf(bp, " LIMIT"); 2264 break; 2265 case O_KEEP_STATE: /* bidir, no mask */ 2266 bprintf(bp, " STATE"); 2267 break; 2268 } 2269 2270 if ((pe = getprotobynumber(d->id.proto)) != NULL) 2271 bprintf(bp, " %s", pe->p_name); 2272 else 2273 bprintf(bp, " proto %u", d->id.proto); 2274 2275 if (d->id.addr_type == 4) { 2276 a.s_addr = htonl(d->id.src_ip); 2277 bprintf(bp, " %s %d", inet_ntoa(a), d->id.src_port); 2278 2279 a.s_addr = htonl(d->id.dst_ip); 2280 bprintf(bp, " <-> %s %d", inet_ntoa(a), d->id.dst_port); 2281 } else if (d->id.addr_type == 6) { 2282 bprintf(bp, " %s %d", inet_ntop(AF_INET6, &d->id.src_ip6, buf, 2283 sizeof(buf)), d->id.src_port); 2284 bprintf(bp, " <-> %s %d", inet_ntop(AF_INET6, &d->id.dst_ip6, 2285 buf, sizeof(buf)), d->id.dst_port); 2286 } else 2287 bprintf(bp, " UNKNOWN <-> UNKNOWN"); 2288 if (d->kidx != 0) 2289 bprintf(bp, " :%s", object_search_ctlv(fo->tstate, 2290 d->kidx, IPFW_TLV_STATE_NAME)); 2291 2292 #define BOTH_SYN (TH_SYN | (TH_SYN << 8)) 2293 #define BOTH_FIN (TH_FIN | (TH_FIN << 8)) 2294 if (co->verbose) { 2295 bprintf(bp, " state 0x%08x%s", d->state, 2296 d->state ? " ": ","); 2297 if (d->state & IPFW_DYN_ORPHANED) 2298 bprintf(bp, "ORPHANED,"); 2299 if ((d->state & BOTH_SYN) == BOTH_SYN) 2300 bprintf(bp, "BOTH_SYN,"); 2301 else { 2302 if (d->state & TH_SYN) 2303 bprintf(bp, "F_SYN,"); 2304 if (d->state & (TH_SYN << 8)) 2305 bprintf(bp, "R_SYN,"); 2306 } 2307 if ((d->state & BOTH_FIN) == BOTH_FIN) 2308 bprintf(bp, "BOTH_FIN,"); 2309 else { 2310 if (d->state & TH_FIN) 2311 bprintf(bp, "F_FIN,"); 2312 if (d->state & (TH_FIN << 8)) 2313 bprintf(bp, "R_FIN,"); 2314 } 2315 bprintf(bp, " f_ack 0x%x, r_ack 0x%x", d->ack_fwd, 2316 d->ack_rev); 2317 } 2318 } 2319 2320 static int 2321 do_range_cmd(int cmd, ipfw_range_tlv *rt) 2322 { 2323 ipfw_range_header rh; 2324 size_t sz; 2325 2326 memset(&rh, 0, sizeof(rh)); 2327 memcpy(&rh.range, rt, sizeof(*rt)); 2328 rh.range.head.length = sizeof(*rt); 2329 rh.range.head.type = IPFW_TLV_RANGE; 2330 sz = sizeof(rh); 2331 2332 if (do_get3(cmd, &rh.opheader, &sz) != 0) 2333 return (-1); 2334 /* Save number of matched objects */ 2335 rt->new_set = rh.range.new_set; 2336 return (0); 2337 } 2338 2339 /* 2340 * This one handles all set-related commands 2341 * ipfw set { show | enable | disable } 2342 * ipfw set swap X Y 2343 * ipfw set move X to Y 2344 * ipfw set move rule X to Y 2345 */ 2346 void 2347 ipfw_sets_handler(char *av[]) 2348 { 2349 ipfw_range_tlv rt; 2350 char *msg; 2351 size_t size; 2352 uint32_t masks[2]; 2353 int i; 2354 uint16_t rulenum; 2355 uint8_t cmd; 2356 2357 av++; 2358 memset(&rt, 0, sizeof(rt)); 2359 2360 if (av[0] == NULL) 2361 errx(EX_USAGE, "set needs command"); 2362 if (_substrcmp(*av, "show") == 0) { 2363 struct format_opts fo; 2364 ipfw_cfg_lheader *cfg; 2365 2366 memset(&fo, 0, sizeof(fo)); 2367 if (ipfw_get_config(&co, &fo, &cfg, &size) != 0) 2368 err(EX_OSERR, "requesting config failed"); 2369 2370 for (i = 0, msg = "disable"; i < RESVD_SET; i++) 2371 if ((cfg->set_mask & (1<<i)) == 0) { 2372 printf("%s %d", msg, i); 2373 msg = ""; 2374 } 2375 msg = (cfg->set_mask != (uint32_t)-1) ? " enable" : "enable"; 2376 for (i = 0; i < RESVD_SET; i++) 2377 if ((cfg->set_mask & (1<<i)) != 0) { 2378 printf("%s %d", msg, i); 2379 msg = ""; 2380 } 2381 printf("\n"); 2382 free(cfg); 2383 } else if (_substrcmp(*av, "swap") == 0) { 2384 av++; 2385 if ( av[0] == NULL || av[1] == NULL ) 2386 errx(EX_USAGE, "set swap needs 2 set numbers\n"); 2387 rt.set = atoi(av[0]); 2388 rt.new_set = atoi(av[1]); 2389 if (!isdigit(*(av[0])) || rt.set > RESVD_SET) 2390 errx(EX_DATAERR, "invalid set number %s\n", av[0]); 2391 if (!isdigit(*(av[1])) || rt.new_set > RESVD_SET) 2392 errx(EX_DATAERR, "invalid set number %s\n", av[1]); 2393 i = do_range_cmd(IP_FW_SET_SWAP, &rt); 2394 } else if (_substrcmp(*av, "move") == 0) { 2395 av++; 2396 if (av[0] && _substrcmp(*av, "rule") == 0) { 2397 rt.flags = IPFW_RCFLAG_RANGE; /* move rules to new set */ 2398 cmd = IP_FW_XMOVE; 2399 av++; 2400 } else 2401 cmd = IP_FW_SET_MOVE; /* Move set to new one */ 2402 if (av[0] == NULL || av[1] == NULL || av[2] == NULL || 2403 av[3] != NULL || _substrcmp(av[1], "to") != 0) 2404 errx(EX_USAGE, "syntax: set move [rule] X to Y\n"); 2405 rulenum = atoi(av[0]); 2406 rt.new_set = atoi(av[2]); 2407 if (cmd == IP_FW_XMOVE) { 2408 rt.start_rule = rulenum; 2409 rt.end_rule = rulenum; 2410 } else 2411 rt.set = rulenum; 2412 rt.new_set = atoi(av[2]); 2413 if (!isdigit(*(av[0])) || (cmd == 3 && rt.set > RESVD_SET) || 2414 (cmd == 2 && rt.start_rule == IPFW_DEFAULT_RULE) ) 2415 errx(EX_DATAERR, "invalid source number %s\n", av[0]); 2416 if (!isdigit(*(av[2])) || rt.new_set > RESVD_SET) 2417 errx(EX_DATAERR, "invalid dest. set %s\n", av[1]); 2418 i = do_range_cmd(cmd, &rt); 2419 if (i < 0) 2420 err(EX_OSERR, "failed to move %s", 2421 cmd == IP_FW_SET_MOVE ? "set": "rule"); 2422 } else if (_substrcmp(*av, "disable") == 0 || 2423 _substrcmp(*av, "enable") == 0 ) { 2424 int which = _substrcmp(*av, "enable") == 0 ? 1 : 0; 2425 2426 av++; 2427 masks[0] = masks[1] = 0; 2428 2429 while (av[0]) { 2430 if (isdigit(**av)) { 2431 i = atoi(*av); 2432 if (i < 0 || i > RESVD_SET) 2433 errx(EX_DATAERR, 2434 "invalid set number %d\n", i); 2435 masks[which] |= (1<<i); 2436 } else if (_substrcmp(*av, "disable") == 0) 2437 which = 0; 2438 else if (_substrcmp(*av, "enable") == 0) 2439 which = 1; 2440 else 2441 errx(EX_DATAERR, 2442 "invalid set command %s\n", *av); 2443 av++; 2444 } 2445 if ( (masks[0] & masks[1]) != 0 ) 2446 errx(EX_DATAERR, 2447 "cannot enable and disable the same set\n"); 2448 2449 rt.set = masks[0]; 2450 rt.new_set = masks[1]; 2451 i = do_range_cmd(IP_FW_SET_ENABLE, &rt); 2452 if (i) 2453 warn("set enable/disable: setsockopt(IP_FW_SET_ENABLE)"); 2454 } else 2455 errx(EX_USAGE, "invalid set command %s\n", *av); 2456 } 2457 2458 void 2459 ipfw_sysctl_handler(char *av[], int which) 2460 { 2461 av++; 2462 2463 if (av[0] == NULL) { 2464 warnx("missing keyword to enable/disable\n"); 2465 } else if (_substrcmp(*av, "firewall") == 0) { 2466 sysctlbyname("net.inet.ip.fw.enable", NULL, 0, 2467 &which, sizeof(which)); 2468 sysctlbyname("net.inet6.ip6.fw.enable", NULL, 0, 2469 &which, sizeof(which)); 2470 } else if (_substrcmp(*av, "one_pass") == 0) { 2471 sysctlbyname("net.inet.ip.fw.one_pass", NULL, 0, 2472 &which, sizeof(which)); 2473 } else if (_substrcmp(*av, "debug") == 0) { 2474 sysctlbyname("net.inet.ip.fw.debug", NULL, 0, 2475 &which, sizeof(which)); 2476 } else if (_substrcmp(*av, "verbose") == 0) { 2477 sysctlbyname("net.inet.ip.fw.verbose", NULL, 0, 2478 &which, sizeof(which)); 2479 } else if (_substrcmp(*av, "dyn_keepalive") == 0) { 2480 sysctlbyname("net.inet.ip.fw.dyn_keepalive", NULL, 0, 2481 &which, sizeof(which)); 2482 #ifndef NO_ALTQ 2483 } else if (_substrcmp(*av, "altq") == 0) { 2484 altq_set_enabled(which); 2485 #endif 2486 } else { 2487 warnx("unrecognize enable/disable keyword: %s\n", *av); 2488 } 2489 } 2490 2491 typedef void state_cb(struct cmdline_opts *co, struct format_opts *fo, 2492 void *arg, void *state); 2493 2494 static void 2495 prepare_format_dyn(struct cmdline_opts *co, struct format_opts *fo, 2496 void *arg, void *_state) 2497 { 2498 ipfw_dyn_rule *d; 2499 int width; 2500 uint8_t set; 2501 2502 d = (ipfw_dyn_rule *)_state; 2503 /* Count _ALL_ states */ 2504 fo->dcnt++; 2505 2506 if (fo->show_counters == 0) 2507 return; 2508 2509 if (co->use_set) { 2510 /* skip states from another set */ 2511 bcopy((char *)&d->rule + sizeof(uint16_t), &set, 2512 sizeof(uint8_t)); 2513 if (set != co->use_set - 1) 2514 return; 2515 } 2516 2517 width = pr_u64(NULL, &d->pcnt, 0); 2518 if (width > fo->pcwidth) 2519 fo->pcwidth = width; 2520 2521 width = pr_u64(NULL, &d->bcnt, 0); 2522 if (width > fo->bcwidth) 2523 fo->bcwidth = width; 2524 } 2525 2526 static int 2527 foreach_state(struct cmdline_opts *co, struct format_opts *fo, 2528 caddr_t base, size_t sz, state_cb dyn_bc, void *dyn_arg) 2529 { 2530 int ttype; 2531 state_cb *fptr; 2532 void *farg; 2533 ipfw_obj_tlv *tlv; 2534 ipfw_obj_ctlv *ctlv; 2535 2536 fptr = NULL; 2537 ttype = 0; 2538 2539 while (sz > 0) { 2540 ctlv = (ipfw_obj_ctlv *)base; 2541 switch (ctlv->head.type) { 2542 case IPFW_TLV_DYNSTATE_LIST: 2543 base += sizeof(*ctlv); 2544 sz -= sizeof(*ctlv); 2545 ttype = IPFW_TLV_DYN_ENT; 2546 fptr = dyn_bc; 2547 farg = dyn_arg; 2548 break; 2549 default: 2550 return (sz); 2551 } 2552 2553 while (sz > 0) { 2554 tlv = (ipfw_obj_tlv *)base; 2555 if (tlv->type != ttype) 2556 break; 2557 2558 fptr(co, fo, farg, tlv + 1); 2559 sz -= tlv->length; 2560 base += tlv->length; 2561 } 2562 } 2563 2564 return (sz); 2565 } 2566 2567 static void 2568 prepare_format_opts(struct cmdline_opts *co, struct format_opts *fo, 2569 ipfw_obj_tlv *rtlv, int rcnt, caddr_t dynbase, size_t dynsz) 2570 { 2571 int bcwidth, pcwidth, width; 2572 int n; 2573 struct ip_fw_bcounter *cntr; 2574 struct ip_fw_rule *r; 2575 2576 bcwidth = 0; 2577 pcwidth = 0; 2578 if (fo->show_counters != 0) { 2579 for (n = 0; n < rcnt; n++, 2580 rtlv = (ipfw_obj_tlv *)((caddr_t)rtlv + rtlv->length)) { 2581 cntr = (struct ip_fw_bcounter *)(rtlv + 1); 2582 r = (struct ip_fw_rule *)((caddr_t)cntr + cntr->size); 2583 /* skip rules from another set */ 2584 if (co->use_set && r->set != co->use_set - 1) 2585 continue; 2586 2587 /* packet counter */ 2588 width = pr_u64(NULL, &cntr->pcnt, 0); 2589 if (width > pcwidth) 2590 pcwidth = width; 2591 2592 /* byte counter */ 2593 width = pr_u64(NULL, &cntr->bcnt, 0); 2594 if (width > bcwidth) 2595 bcwidth = width; 2596 } 2597 } 2598 fo->bcwidth = bcwidth; 2599 fo->pcwidth = pcwidth; 2600 2601 fo->dcnt = 0; 2602 if (co->do_dynamic && dynsz > 0) 2603 foreach_state(co, fo, dynbase, dynsz, prepare_format_dyn, NULL); 2604 } 2605 2606 static int 2607 list_static_range(struct cmdline_opts *co, struct format_opts *fo, 2608 struct buf_pr *bp, ipfw_obj_tlv *rtlv, int rcnt) 2609 { 2610 int n, seen; 2611 struct ip_fw_rule *r; 2612 struct ip_fw_bcounter *cntr; 2613 int c = 0; 2614 2615 for (n = seen = 0; n < rcnt; n++, 2616 rtlv = (ipfw_obj_tlv *)((caddr_t)rtlv + rtlv->length)) { 2617 2618 if ((fo->show_counters | fo->show_time) != 0) { 2619 cntr = (struct ip_fw_bcounter *)(rtlv + 1); 2620 r = (struct ip_fw_rule *)((caddr_t)cntr + cntr->size); 2621 } else { 2622 cntr = NULL; 2623 r = (struct ip_fw_rule *)(rtlv + 1); 2624 } 2625 if (r->rulenum > fo->last) 2626 break; 2627 if (co->use_set && r->set != co->use_set - 1) 2628 continue; 2629 if (r->rulenum >= fo->first && r->rulenum <= fo->last) { 2630 show_static_rule(co, fo, bp, r, cntr); 2631 printf("%s", bp->buf); 2632 c += rtlv->length; 2633 bp_flush(bp); 2634 seen++; 2635 } 2636 } 2637 2638 return (seen); 2639 } 2640 2641 static void 2642 list_dyn_state(struct cmdline_opts *co, struct format_opts *fo, 2643 void *_arg, void *_state) 2644 { 2645 uint16_t rulenum; 2646 uint8_t set; 2647 ipfw_dyn_rule *d; 2648 struct buf_pr *bp; 2649 2650 d = (ipfw_dyn_rule *)_state; 2651 bp = (struct buf_pr *)_arg; 2652 2653 bcopy(&d->rule, &rulenum, sizeof(rulenum)); 2654 if (rulenum > fo->last) 2655 return; 2656 if (co->use_set) { 2657 bcopy((char *)&d->rule + sizeof(uint16_t), 2658 &set, sizeof(uint8_t)); 2659 if (set != co->use_set - 1) 2660 return; 2661 } 2662 if (rulenum >= fo->first) { 2663 show_dyn_state(co, fo, bp, d); 2664 printf("%s\n", bp->buf); 2665 bp_flush(bp); 2666 } 2667 } 2668 2669 static int 2670 list_dyn_range(struct cmdline_opts *co, struct format_opts *fo, 2671 struct buf_pr *bp, caddr_t base, size_t sz) 2672 { 2673 2674 sz = foreach_state(co, fo, base, sz, list_dyn_state, bp); 2675 return (sz); 2676 } 2677 2678 void 2679 ipfw_list(int ac, char *av[], int show_counters) 2680 { 2681 ipfw_cfg_lheader *cfg; 2682 struct format_opts sfo; 2683 size_t sz; 2684 int error; 2685 int lac; 2686 char **lav; 2687 uint32_t rnum; 2688 char *endptr; 2689 2690 if (co.test_only) { 2691 fprintf(stderr, "Testing only, list disabled\n"); 2692 return; 2693 } 2694 if (co.do_pipe) { 2695 dummynet_list(ac, av, show_counters); 2696 return; 2697 } 2698 2699 ac--; 2700 av++; 2701 memset(&sfo, 0, sizeof(sfo)); 2702 2703 /* Determine rule range to request */ 2704 if (ac > 0) { 2705 for (lac = ac, lav = av; lac != 0; lac--) { 2706 rnum = strtoul(*lav++, &endptr, 10); 2707 if (sfo.first == 0 || rnum < sfo.first) 2708 sfo.first = rnum; 2709 2710 if (*endptr == '-') 2711 rnum = strtoul(endptr + 1, &endptr, 10); 2712 if (sfo.last == 0 || rnum > sfo.last) 2713 sfo.last = rnum; 2714 } 2715 } 2716 2717 /* get configuraion from kernel */ 2718 cfg = NULL; 2719 sfo.show_counters = show_counters; 2720 sfo.show_time = co.do_time; 2721 if (co.do_dynamic != 2) 2722 sfo.flags |= IPFW_CFG_GET_STATIC; 2723 if (co.do_dynamic != 0) 2724 sfo.flags |= IPFW_CFG_GET_STATES; 2725 if ((sfo.show_counters | sfo.show_time) != 0) 2726 sfo.flags |= IPFW_CFG_GET_COUNTERS; 2727 if (ipfw_get_config(&co, &sfo, &cfg, &sz) != 0) 2728 err(EX_OSERR, "retrieving config failed"); 2729 2730 error = ipfw_show_config(&co, &sfo, cfg, sz, ac, av); 2731 2732 free(cfg); 2733 2734 if (error != EX_OK) 2735 exit(error); 2736 } 2737 2738 static int 2739 ipfw_show_config(struct cmdline_opts *co, struct format_opts *fo, 2740 ipfw_cfg_lheader *cfg, size_t sz, int ac, char *av[]) 2741 { 2742 caddr_t dynbase; 2743 size_t dynsz; 2744 int rcnt; 2745 int exitval = EX_OK; 2746 int lac; 2747 char **lav; 2748 char *endptr; 2749 size_t readsz; 2750 struct buf_pr bp; 2751 ipfw_obj_ctlv *ctlv, *tstate; 2752 ipfw_obj_tlv *rbase; 2753 2754 /* 2755 * Handle tablenames TLV first, if any 2756 */ 2757 tstate = NULL; 2758 rbase = NULL; 2759 dynbase = NULL; 2760 dynsz = 0; 2761 readsz = sizeof(*cfg); 2762 rcnt = 0; 2763 2764 fo->set_mask = cfg->set_mask; 2765 2766 ctlv = (ipfw_obj_ctlv *)(cfg + 1); 2767 if (ctlv->head.type == IPFW_TLV_TBLNAME_LIST) { 2768 object_sort_ctlv(ctlv); 2769 fo->tstate = ctlv; 2770 readsz += ctlv->head.length; 2771 ctlv = (ipfw_obj_ctlv *)((caddr_t)ctlv + ctlv->head.length); 2772 } 2773 2774 if (cfg->flags & IPFW_CFG_GET_STATIC) { 2775 /* We've requested static rules */ 2776 if (ctlv->head.type == IPFW_TLV_RULE_LIST) { 2777 rbase = (ipfw_obj_tlv *)(ctlv + 1); 2778 rcnt = ctlv->count; 2779 readsz += ctlv->head.length; 2780 ctlv = (ipfw_obj_ctlv *)((caddr_t)ctlv + 2781 ctlv->head.length); 2782 } 2783 } 2784 2785 if ((cfg->flags & IPFW_CFG_GET_STATES) && (readsz != sz)) { 2786 /* We may have some dynamic states */ 2787 dynsz = sz - readsz; 2788 /* Skip empty header */ 2789 if (dynsz != sizeof(ipfw_obj_ctlv)) 2790 dynbase = (caddr_t)ctlv; 2791 else 2792 dynsz = 0; 2793 } 2794 2795 prepare_format_opts(co, fo, rbase, rcnt, dynbase, dynsz); 2796 bp_alloc(&bp, 4096); 2797 2798 /* if no rule numbers were specified, list all rules */ 2799 if (ac == 0) { 2800 fo->first = 0; 2801 fo->last = IPFW_DEFAULT_RULE; 2802 if (cfg->flags & IPFW_CFG_GET_STATIC) 2803 list_static_range(co, fo, &bp, rbase, rcnt); 2804 2805 if (co->do_dynamic && dynsz > 0) { 2806 printf("## Dynamic rules (%d %zu):\n", fo->dcnt, 2807 dynsz); 2808 list_dyn_range(co, fo, &bp, dynbase, dynsz); 2809 } 2810 2811 bp_free(&bp); 2812 return (EX_OK); 2813 } 2814 2815 /* display specific rules requested on command line */ 2816 for (lac = ac, lav = av; lac != 0; lac--) { 2817 /* convert command line rule # */ 2818 fo->last = fo->first = strtoul(*lav++, &endptr, 10); 2819 if (*endptr == '-') 2820 fo->last = strtoul(endptr + 1, &endptr, 10); 2821 if (*endptr) { 2822 exitval = EX_USAGE; 2823 warnx("invalid rule number: %s", *(lav - 1)); 2824 continue; 2825 } 2826 2827 if ((cfg->flags & IPFW_CFG_GET_STATIC) == 0) 2828 continue; 2829 2830 if (list_static_range(co, fo, &bp, rbase, rcnt) == 0) { 2831 /* give precedence to other error(s) */ 2832 if (exitval == EX_OK) 2833 exitval = EX_UNAVAILABLE; 2834 if (fo->first == fo->last) 2835 warnx("rule %u does not exist", fo->first); 2836 else 2837 warnx("no rules in range %u-%u", 2838 fo->first, fo->last); 2839 } 2840 } 2841 2842 if (co->do_dynamic && dynsz > 0) { 2843 printf("## Dynamic rules:\n"); 2844 for (lac = ac, lav = av; lac != 0; lac--) { 2845 fo->last = fo->first = strtoul(*lav++, &endptr, 10); 2846 if (*endptr == '-') 2847 fo->last = strtoul(endptr+1, &endptr, 10); 2848 if (*endptr) 2849 /* already warned */ 2850 continue; 2851 list_dyn_range(co, fo, &bp, dynbase, dynsz); 2852 } 2853 } 2854 2855 bp_free(&bp); 2856 return (exitval); 2857 } 2858 2859 2860 /* 2861 * Retrieves current ipfw configuration of given type 2862 * and stores its pointer to @pcfg. 2863 * 2864 * Caller is responsible for freeing @pcfg. 2865 * 2866 * Returns 0 on success. 2867 */ 2868 2869 static int 2870 ipfw_get_config(struct cmdline_opts *co, struct format_opts *fo, 2871 ipfw_cfg_lheader **pcfg, size_t *psize) 2872 { 2873 ipfw_cfg_lheader *cfg; 2874 size_t sz; 2875 int i; 2876 2877 2878 if (co->test_only != 0) { 2879 fprintf(stderr, "Testing only, list disabled\n"); 2880 return (0); 2881 } 2882 2883 /* Start with some data size */ 2884 sz = 4096; 2885 cfg = NULL; 2886 2887 for (i = 0; i < 16; i++) { 2888 if (cfg != NULL) 2889 free(cfg); 2890 if ((cfg = calloc(1, sz)) == NULL) 2891 return (ENOMEM); 2892 2893 cfg->flags = fo->flags; 2894 cfg->start_rule = fo->first; 2895 cfg->end_rule = fo->last; 2896 2897 if (do_get3(IP_FW_XGET, &cfg->opheader, &sz) != 0) { 2898 if (errno != ENOMEM) { 2899 free(cfg); 2900 return (errno); 2901 } 2902 2903 /* Buffer size is not enough. Try to increase */ 2904 sz = sz * 2; 2905 if (sz < cfg->size) 2906 sz = cfg->size; 2907 continue; 2908 } 2909 2910 *pcfg = cfg; 2911 *psize = sz; 2912 return (0); 2913 } 2914 2915 free(cfg); 2916 return (ENOMEM); 2917 } 2918 2919 static int 2920 lookup_host (char *host, struct in_addr *ipaddr) 2921 { 2922 struct hostent *he; 2923 2924 if (!inet_aton(host, ipaddr)) { 2925 if ((he = gethostbyname(host)) == NULL) 2926 return(-1); 2927 *ipaddr = *(struct in_addr *)he->h_addr_list[0]; 2928 } 2929 return(0); 2930 } 2931 2932 struct tidx { 2933 ipfw_obj_ntlv *idx; 2934 uint32_t count; 2935 uint32_t size; 2936 uint16_t counter; 2937 uint8_t set; 2938 }; 2939 2940 int 2941 ipfw_check_object_name(const char *name) 2942 { 2943 int c, i, l; 2944 2945 /* 2946 * Check that name is null-terminated and contains 2947 * valid symbols only. Valid mask is: 2948 * [a-zA-Z0-9\-_\.]{1,63} 2949 */ 2950 l = strlen(name); 2951 if (l == 0 || l >= 64) 2952 return (EINVAL); 2953 for (i = 0; i < l; i++) { 2954 c = name[i]; 2955 if (isalpha(c) || isdigit(c) || c == '_' || 2956 c == '-' || c == '.') 2957 continue; 2958 return (EINVAL); 2959 } 2960 return (0); 2961 } 2962 2963 static char *default_state_name = "default"; 2964 static int 2965 state_check_name(const char *name) 2966 { 2967 2968 if (ipfw_check_object_name(name) != 0) 2969 return (EINVAL); 2970 if (strcmp(name, "any") == 0) 2971 return (EINVAL); 2972 return (0); 2973 } 2974 2975 static int 2976 eaction_check_name(const char *name) 2977 { 2978 2979 if (ipfw_check_object_name(name) != 0) 2980 return (EINVAL); 2981 /* Restrict some 'special' names */ 2982 if (match_token(rule_actions, name) != -1 && 2983 match_token(rule_action_params, name) != -1) 2984 return (EINVAL); 2985 return (0); 2986 } 2987 2988 static uint16_t 2989 pack_object(struct tidx *tstate, char *name, int otype) 2990 { 2991 int i; 2992 ipfw_obj_ntlv *ntlv; 2993 2994 for (i = 0; i < tstate->count; i++) { 2995 if (strcmp(tstate->idx[i].name, name) != 0) 2996 continue; 2997 if (tstate->idx[i].set != tstate->set) 2998 continue; 2999 if (tstate->idx[i].head.type != otype) 3000 continue; 3001 3002 return (tstate->idx[i].idx); 3003 } 3004 3005 if (tstate->count + 1 > tstate->size) { 3006 tstate->size += 4; 3007 tstate->idx = realloc(tstate->idx, tstate->size * 3008 sizeof(ipfw_obj_ntlv)); 3009 if (tstate->idx == NULL) 3010 return (0); 3011 } 3012 3013 ntlv = &tstate->idx[i]; 3014 memset(ntlv, 0, sizeof(ipfw_obj_ntlv)); 3015 strlcpy(ntlv->name, name, sizeof(ntlv->name)); 3016 ntlv->head.type = otype; 3017 ntlv->head.length = sizeof(ipfw_obj_ntlv); 3018 ntlv->set = tstate->set; 3019 ntlv->idx = ++tstate->counter; 3020 tstate->count++; 3021 3022 return (ntlv->idx); 3023 } 3024 3025 static uint16_t 3026 pack_table(struct tidx *tstate, char *name) 3027 { 3028 3029 if (table_check_name(name) != 0) 3030 return (0); 3031 3032 return (pack_object(tstate, name, IPFW_TLV_TBL_NAME)); 3033 } 3034 3035 void 3036 fill_table(struct _ipfw_insn *cmd, char *av, uint8_t opcode, 3037 struct tidx *tstate) 3038 { 3039 uint32_t *d = ((ipfw_insn_u32 *)cmd)->d; 3040 uint16_t uidx; 3041 char *p; 3042 3043 if ((p = strchr(av + 6, ')')) == NULL) 3044 errx(EX_DATAERR, "forgotten parenthesis: '%s'", av); 3045 *p = '\0'; 3046 p = strchr(av + 6, ','); 3047 if (p) 3048 *p++ = '\0'; 3049 3050 if ((uidx = pack_table(tstate, av + 6)) == 0) 3051 errx(EX_DATAERR, "Invalid table name: %s", av + 6); 3052 3053 cmd->opcode = opcode; 3054 cmd->arg1 = uidx; 3055 if (p) { 3056 cmd->len |= F_INSN_SIZE(ipfw_insn_u32); 3057 d[0] = strtoul(p, NULL, 0); 3058 } else 3059 cmd->len |= F_INSN_SIZE(ipfw_insn); 3060 } 3061 3062 3063 /* 3064 * fills the addr and mask fields in the instruction as appropriate from av. 3065 * Update length as appropriate. 3066 * The following formats are allowed: 3067 * me returns O_IP_*_ME 3068 * 1.2.3.4 single IP address 3069 * 1.2.3.4:5.6.7.8 address:mask 3070 * 1.2.3.4/24 address/mask 3071 * 1.2.3.4/26{1,6,5,4,23} set of addresses in a subnet 3072 * We can have multiple comma-separated address/mask entries. 3073 */ 3074 static void 3075 fill_ip(ipfw_insn_ip *cmd, char *av, int cblen, struct tidx *tstate) 3076 { 3077 int len = 0; 3078 uint32_t *d = ((ipfw_insn_u32 *)cmd)->d; 3079 3080 cmd->o.len &= ~F_LEN_MASK; /* zero len */ 3081 3082 if (_substrcmp(av, "any") == 0) 3083 return; 3084 3085 if (_substrcmp(av, "me") == 0) { 3086 cmd->o.len |= F_INSN_SIZE(ipfw_insn); 3087 return; 3088 } 3089 3090 if (strncmp(av, "table(", 6) == 0) { 3091 fill_table(&cmd->o, av, O_IP_DST_LOOKUP, tstate); 3092 return; 3093 } 3094 3095 while (av) { 3096 /* 3097 * After the address we can have '/' or ':' indicating a mask, 3098 * ',' indicating another address follows, '{' indicating a 3099 * set of addresses of unspecified size. 3100 */ 3101 char *t = NULL, *p = strpbrk(av, "/:,{"); 3102 int masklen; 3103 char md, nd = '\0'; 3104 3105 CHECK_LENGTH(cblen, F_INSN_SIZE(ipfw_insn) + 2 + len); 3106 3107 if (p) { 3108 md = *p; 3109 *p++ = '\0'; 3110 if ((t = strpbrk(p, ",{")) != NULL) { 3111 nd = *t; 3112 *t = '\0'; 3113 } 3114 } else 3115 md = '\0'; 3116 3117 if (lookup_host(av, (struct in_addr *)&d[0]) != 0) 3118 errx(EX_NOHOST, "hostname ``%s'' unknown", av); 3119 switch (md) { 3120 case ':': 3121 if (!inet_aton(p, (struct in_addr *)&d[1])) 3122 errx(EX_DATAERR, "bad netmask ``%s''", p); 3123 break; 3124 case '/': 3125 masklen = atoi(p); 3126 if (masklen == 0) 3127 d[1] = htonl(0U); /* mask */ 3128 else if (masklen > 32) 3129 errx(EX_DATAERR, "bad width ``%s''", p); 3130 else 3131 d[1] = htonl(~0U << (32 - masklen)); 3132 break; 3133 case '{': /* no mask, assume /24 and put back the '{' */ 3134 d[1] = htonl(~0U << (32 - 24)); 3135 *(--p) = md; 3136 break; 3137 3138 case ',': /* single address plus continuation */ 3139 *(--p) = md; 3140 /* FALLTHROUGH */ 3141 case 0: /* initialization value */ 3142 default: 3143 d[1] = htonl(~0U); /* force /32 */ 3144 break; 3145 } 3146 d[0] &= d[1]; /* mask base address with mask */ 3147 if (t) 3148 *t = nd; 3149 /* find next separator */ 3150 if (p) 3151 p = strpbrk(p, ",{"); 3152 if (p && *p == '{') { 3153 /* 3154 * We have a set of addresses. They are stored as follows: 3155 * arg1 is the set size (powers of 2, 2..256) 3156 * addr is the base address IN HOST FORMAT 3157 * mask.. is an array of arg1 bits (rounded up to 3158 * the next multiple of 32) with bits set 3159 * for each host in the map. 3160 */ 3161 uint32_t *map = (uint32_t *)&cmd->mask; 3162 int low, high; 3163 int i = contigmask((uint8_t *)&(d[1]), 32); 3164 3165 if (len > 0) 3166 errx(EX_DATAERR, "address set cannot be in a list"); 3167 if (i < 24 || i > 31) 3168 errx(EX_DATAERR, "invalid set with mask %d\n", i); 3169 cmd->o.arg1 = 1<<(32-i); /* map length */ 3170 d[0] = ntohl(d[0]); /* base addr in host format */ 3171 cmd->o.opcode = O_IP_DST_SET; /* default */ 3172 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32) + (cmd->o.arg1+31)/32; 3173 for (i = 0; i < (cmd->o.arg1+31)/32 ; i++) 3174 map[i] = 0; /* clear map */ 3175 3176 av = p + 1; 3177 low = d[0] & 0xff; 3178 high = low + cmd->o.arg1 - 1; 3179 /* 3180 * Here, i stores the previous value when we specify a range 3181 * of addresses within a mask, e.g. 45-63. i = -1 means we 3182 * have no previous value. 3183 */ 3184 i = -1; /* previous value in a range */ 3185 while (isdigit(*av)) { 3186 char *s; 3187 int a = strtol(av, &s, 0); 3188 3189 if (s == av) { /* no parameter */ 3190 if (*av != '}') 3191 errx(EX_DATAERR, "set not closed\n"); 3192 if (i != -1) 3193 errx(EX_DATAERR, "incomplete range %d-", i); 3194 break; 3195 } 3196 if (a < low || a > high) 3197 errx(EX_DATAERR, "addr %d out of range [%d-%d]\n", 3198 a, low, high); 3199 a -= low; 3200 if (i == -1) /* no previous in range */ 3201 i = a; 3202 else { /* check that range is valid */ 3203 if (i > a) 3204 errx(EX_DATAERR, "invalid range %d-%d", 3205 i+low, a+low); 3206 if (*s == '-') 3207 errx(EX_DATAERR, "double '-' in range"); 3208 } 3209 for (; i <= a; i++) 3210 map[i/32] |= 1<<(i & 31); 3211 i = -1; 3212 if (*s == '-') 3213 i = a; 3214 else if (*s == '}') 3215 break; 3216 av = s+1; 3217 } 3218 return; 3219 } 3220 av = p; 3221 if (av) /* then *av must be a ',' */ 3222 av++; 3223 3224 /* Check this entry */ 3225 if (d[1] == 0) { /* "any", specified as x.x.x.x/0 */ 3226 /* 3227 * 'any' turns the entire list into a NOP. 3228 * 'not any' never matches, so it is removed from the 3229 * list unless it is the only item, in which case we 3230 * report an error. 3231 */ 3232 if (cmd->o.len & F_NOT) { /* "not any" never matches */ 3233 if (av == NULL && len == 0) /* only this entry */ 3234 errx(EX_DATAERR, "not any never matches"); 3235 } 3236 /* else do nothing and skip this entry */ 3237 return; 3238 } 3239 /* A single IP can be stored in an optimized format */ 3240 if (d[1] == (uint32_t)~0 && av == NULL && len == 0) { 3241 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32); 3242 return; 3243 } 3244 len += 2; /* two words... */ 3245 d += 2; 3246 } /* end while */ 3247 if (len + 1 > F_LEN_MASK) 3248 errx(EX_DATAERR, "address list too long"); 3249 cmd->o.len |= len+1; 3250 } 3251 3252 3253 /* n2mask sets n bits of the mask */ 3254 void 3255 n2mask(struct in6_addr *mask, int n) 3256 { 3257 static int minimask[9] = 3258 { 0x00, 0x80, 0xc0, 0xe0, 0xf0, 0xf8, 0xfc, 0xfe, 0xff }; 3259 u_char *p; 3260 3261 memset(mask, 0, sizeof(struct in6_addr)); 3262 p = (u_char *) mask; 3263 for (; n > 0; p++, n -= 8) { 3264 if (n >= 8) 3265 *p = 0xff; 3266 else 3267 *p = minimask[n]; 3268 } 3269 return; 3270 } 3271 3272 static void 3273 fill_flags_cmd(ipfw_insn *cmd, enum ipfw_opcodes opcode, 3274 struct _s_x *flags, char *p) 3275 { 3276 char *e; 3277 uint32_t set = 0, clear = 0; 3278 3279 if (fill_flags(flags, p, &e, &set, &clear) != 0) 3280 errx(EX_DATAERR, "invalid flag %s", e); 3281 3282 cmd->opcode = opcode; 3283 cmd->len = (cmd->len & (F_NOT | F_OR)) | 1; 3284 cmd->arg1 = (set & 0xff) | ( (clear & 0xff) << 8); 3285 } 3286 3287 3288 void 3289 ipfw_delete(char *av[]) 3290 { 3291 ipfw_range_tlv rt; 3292 char *sep; 3293 int i, j; 3294 int exitval = EX_OK; 3295 int do_set = 0; 3296 3297 av++; 3298 NEED1("missing rule specification"); 3299 if ( *av && _substrcmp(*av, "set") == 0) { 3300 /* Do not allow using the following syntax: 3301 * ipfw set N delete set M 3302 */ 3303 if (co.use_set) 3304 errx(EX_DATAERR, "invalid syntax"); 3305 do_set = 1; /* delete set */ 3306 av++; 3307 } 3308 3309 /* Rule number */ 3310 while (*av && isdigit(**av)) { 3311 i = strtol(*av, &sep, 10); 3312 j = i; 3313 if (*sep== '-') 3314 j = strtol(sep + 1, NULL, 10); 3315 av++; 3316 if (co.do_nat) { 3317 exitval = do_cmd(IP_FW_NAT_DEL, &i, sizeof i); 3318 if (exitval) { 3319 exitval = EX_UNAVAILABLE; 3320 if (co.do_quiet) 3321 continue; 3322 warn("nat %u not available", i); 3323 } 3324 } else if (co.do_pipe) { 3325 exitval = ipfw_delete_pipe(co.do_pipe, i); 3326 } else { 3327 memset(&rt, 0, sizeof(rt)); 3328 if (do_set != 0) { 3329 rt.set = i & 31; 3330 rt.flags = IPFW_RCFLAG_SET; 3331 } else { 3332 rt.start_rule = i & 0xffff; 3333 rt.end_rule = j & 0xffff; 3334 if (rt.start_rule == 0 && rt.end_rule == 0) 3335 rt.flags |= IPFW_RCFLAG_ALL; 3336 else 3337 rt.flags |= IPFW_RCFLAG_RANGE; 3338 if (co.use_set != 0) { 3339 rt.set = co.use_set - 1; 3340 rt.flags |= IPFW_RCFLAG_SET; 3341 } 3342 } 3343 if (co.do_dynamic == 2) 3344 rt.flags |= IPFW_RCFLAG_DYNAMIC; 3345 i = do_range_cmd(IP_FW_XDEL, &rt); 3346 if (i != 0) { 3347 exitval = EX_UNAVAILABLE; 3348 if (co.do_quiet) 3349 continue; 3350 warn("rule %u: setsockopt(IP_FW_XDEL)", 3351 rt.start_rule); 3352 } else if (rt.new_set == 0 && do_set == 0 && 3353 co.do_dynamic != 2) { 3354 exitval = EX_UNAVAILABLE; 3355 if (co.do_quiet) 3356 continue; 3357 if (rt.start_rule != rt.end_rule) 3358 warnx("no rules rules in %u-%u range", 3359 rt.start_rule, rt.end_rule); 3360 else 3361 warnx("rule %u not found", 3362 rt.start_rule); 3363 } 3364 } 3365 } 3366 if (exitval != EX_OK && co.do_force == 0) 3367 exit(exitval); 3368 } 3369 3370 3371 /* 3372 * fill the interface structure. We do not check the name as we can 3373 * create interfaces dynamically, so checking them at insert time 3374 * makes relatively little sense. 3375 * Interface names containing '*', '?', or '[' are assumed to be shell 3376 * patterns which match interfaces. 3377 */ 3378 static void 3379 fill_iface(ipfw_insn_if *cmd, char *arg, int cblen, struct tidx *tstate) 3380 { 3381 char *p; 3382 uint16_t uidx; 3383 3384 cmd->name[0] = '\0'; 3385 cmd->o.len |= F_INSN_SIZE(ipfw_insn_if); 3386 3387 CHECK_CMDLEN; 3388 3389 /* Parse the interface or address */ 3390 if (strcmp(arg, "any") == 0) 3391 cmd->o.len = 0; /* effectively ignore this command */ 3392 else if (strncmp(arg, "table(", 6) == 0) { 3393 if ((p = strchr(arg + 6, ')')) == NULL) 3394 errx(EX_DATAERR, "forgotten parenthesis: '%s'", arg); 3395 *p = '\0'; 3396 p = strchr(arg + 6, ','); 3397 if (p) 3398 *p++ = '\0'; 3399 if ((uidx = pack_table(tstate, arg + 6)) == 0) 3400 errx(EX_DATAERR, "Invalid table name: %s", arg + 6); 3401 3402 cmd->name[0] = '\1'; /* Special value indicating table */ 3403 cmd->p.kidx = uidx; 3404 } else if (!isdigit(*arg)) { 3405 strlcpy(cmd->name, arg, sizeof(cmd->name)); 3406 cmd->p.glob = strpbrk(arg, "*?[") != NULL ? 1 : 0; 3407 } else if (!inet_aton(arg, &cmd->p.ip)) 3408 errx(EX_DATAERR, "bad ip address ``%s''", arg); 3409 } 3410 3411 static void 3412 get_mac_addr_mask(const char *p, uint8_t *addr, uint8_t *mask) 3413 { 3414 int i; 3415 size_t l; 3416 char *ap, *ptr, *optr; 3417 struct ether_addr *mac; 3418 const char *macset = "0123456789abcdefABCDEF:"; 3419 3420 if (strcmp(p, "any") == 0) { 3421 for (i = 0; i < ETHER_ADDR_LEN; i++) 3422 addr[i] = mask[i] = 0; 3423 return; 3424 } 3425 3426 optr = ptr = strdup(p); 3427 if ((ap = strsep(&ptr, "&/")) != NULL && *ap != 0) { 3428 l = strlen(ap); 3429 if (strspn(ap, macset) != l || (mac = ether_aton(ap)) == NULL) 3430 errx(EX_DATAERR, "Incorrect MAC address"); 3431 bcopy(mac, addr, ETHER_ADDR_LEN); 3432 } else 3433 errx(EX_DATAERR, "Incorrect MAC address"); 3434 3435 if (ptr != NULL) { /* we have mask? */ 3436 if (p[ptr - optr - 1] == '/') { /* mask len */ 3437 long ml = strtol(ptr, &ap, 10); 3438 if (*ap != 0 || ml > ETHER_ADDR_LEN * 8 || ml < 0) 3439 errx(EX_DATAERR, "Incorrect mask length"); 3440 for (i = 0; ml > 0 && i < ETHER_ADDR_LEN; ml -= 8, i++) 3441 mask[i] = (ml >= 8) ? 0xff: (~0) << (8 - ml); 3442 } else { /* mask */ 3443 l = strlen(ptr); 3444 if (strspn(ptr, macset) != l || 3445 (mac = ether_aton(ptr)) == NULL) 3446 errx(EX_DATAERR, "Incorrect mask"); 3447 bcopy(mac, mask, ETHER_ADDR_LEN); 3448 } 3449 } else { /* default mask: ff:ff:ff:ff:ff:ff */ 3450 for (i = 0; i < ETHER_ADDR_LEN; i++) 3451 mask[i] = 0xff; 3452 } 3453 for (i = 0; i < ETHER_ADDR_LEN; i++) 3454 addr[i] &= mask[i]; 3455 3456 free(optr); 3457 } 3458 3459 /* 3460 * helper function, updates the pointer to cmd with the length 3461 * of the current command, and also cleans up the first word of 3462 * the new command in case it has been clobbered before. 3463 */ 3464 static ipfw_insn * 3465 next_cmd(ipfw_insn *cmd, int *len) 3466 { 3467 *len -= F_LEN(cmd); 3468 CHECK_LENGTH(*len, 0); 3469 cmd += F_LEN(cmd); 3470 bzero(cmd, sizeof(*cmd)); 3471 return cmd; 3472 } 3473 3474 /* 3475 * Takes arguments and copies them into a comment 3476 */ 3477 static void 3478 fill_comment(ipfw_insn *cmd, char **av, int cblen) 3479 { 3480 int i, l; 3481 char *p = (char *)(cmd + 1); 3482 3483 cmd->opcode = O_NOP; 3484 cmd->len = (cmd->len & (F_NOT | F_OR)); 3485 3486 /* Compute length of comment string. */ 3487 for (i = 0, l = 0; av[i] != NULL; i++) 3488 l += strlen(av[i]) + 1; 3489 if (l == 0) 3490 return; 3491 if (l > 84) 3492 errx(EX_DATAERR, 3493 "comment too long (max 80 chars)"); 3494 l = 1 + (l+3)/4; 3495 cmd->len = (cmd->len & (F_NOT | F_OR)) | l; 3496 CHECK_CMDLEN; 3497 3498 for (i = 0; av[i] != NULL; i++) { 3499 strcpy(p, av[i]); 3500 p += strlen(av[i]); 3501 *p++ = ' '; 3502 } 3503 *(--p) = '\0'; 3504 } 3505 3506 /* 3507 * A function to fill simple commands of size 1. 3508 * Existing flags are preserved. 3509 */ 3510 static void 3511 fill_cmd(ipfw_insn *cmd, enum ipfw_opcodes opcode, int flags, uint16_t arg) 3512 { 3513 cmd->opcode = opcode; 3514 cmd->len = ((cmd->len | flags) & (F_NOT | F_OR)) | 1; 3515 cmd->arg1 = arg; 3516 } 3517 3518 /* 3519 * Fetch and add the MAC address and type, with masks. This generates one or 3520 * two microinstructions, and returns the pointer to the last one. 3521 */ 3522 static ipfw_insn * 3523 add_mac(ipfw_insn *cmd, char *av[], int cblen) 3524 { 3525 ipfw_insn_mac *mac; 3526 3527 if ( ( av[0] == NULL ) || ( av[1] == NULL ) ) 3528 errx(EX_DATAERR, "MAC dst src"); 3529 3530 cmd->opcode = O_MACADDR2; 3531 cmd->len = (cmd->len & (F_NOT | F_OR)) | F_INSN_SIZE(ipfw_insn_mac); 3532 CHECK_CMDLEN; 3533 3534 mac = (ipfw_insn_mac *)cmd; 3535 get_mac_addr_mask(av[0], mac->addr, mac->mask); /* dst */ 3536 get_mac_addr_mask(av[1], &(mac->addr[ETHER_ADDR_LEN]), 3537 &(mac->mask[ETHER_ADDR_LEN])); /* src */ 3538 return cmd; 3539 } 3540 3541 static ipfw_insn * 3542 add_mactype(ipfw_insn *cmd, char *av, int cblen) 3543 { 3544 if (!av) 3545 errx(EX_DATAERR, "missing MAC type"); 3546 if (strcmp(av, "any") != 0) { /* we have a non-null type */ 3547 fill_newports((ipfw_insn_u16 *)cmd, av, IPPROTO_ETHERTYPE, 3548 cblen); 3549 cmd->opcode = O_MAC_TYPE; 3550 return cmd; 3551 } else 3552 return NULL; 3553 } 3554 3555 static ipfw_insn * 3556 add_proto0(ipfw_insn *cmd, char *av, u_char *protop) 3557 { 3558 struct protoent *pe; 3559 char *ep; 3560 int proto; 3561 3562 proto = strtol(av, &ep, 10); 3563 if (*ep != '\0' || proto <= 0) { 3564 if ((pe = getprotobyname(av)) == NULL) 3565 return NULL; 3566 proto = pe->p_proto; 3567 } 3568 3569 fill_cmd(cmd, O_PROTO, 0, proto); 3570 *protop = proto; 3571 return cmd; 3572 } 3573 3574 static ipfw_insn * 3575 add_proto(ipfw_insn *cmd, char *av, u_char *protop) 3576 { 3577 u_char proto = IPPROTO_IP; 3578 3579 if (_substrcmp(av, "all") == 0 || strcmp(av, "ip") == 0) 3580 ; /* do not set O_IP4 nor O_IP6 */ 3581 else if (strcmp(av, "ip4") == 0) 3582 /* explicit "just IPv4" rule */ 3583 fill_cmd(cmd, O_IP4, 0, 0); 3584 else if (strcmp(av, "ip6") == 0) { 3585 /* explicit "just IPv6" rule */ 3586 proto = IPPROTO_IPV6; 3587 fill_cmd(cmd, O_IP6, 0, 0); 3588 } else 3589 return add_proto0(cmd, av, protop); 3590 3591 *protop = proto; 3592 return cmd; 3593 } 3594 3595 static ipfw_insn * 3596 add_proto_compat(ipfw_insn *cmd, char *av, u_char *protop) 3597 { 3598 u_char proto = IPPROTO_IP; 3599 3600 if (_substrcmp(av, "all") == 0 || strcmp(av, "ip") == 0) 3601 ; /* do not set O_IP4 nor O_IP6 */ 3602 else if (strcmp(av, "ipv4") == 0 || strcmp(av, "ip4") == 0) 3603 /* explicit "just IPv4" rule */ 3604 fill_cmd(cmd, O_IP4, 0, 0); 3605 else if (strcmp(av, "ipv6") == 0 || strcmp(av, "ip6") == 0) { 3606 /* explicit "just IPv6" rule */ 3607 proto = IPPROTO_IPV6; 3608 fill_cmd(cmd, O_IP6, 0, 0); 3609 } else 3610 return add_proto0(cmd, av, protop); 3611 3612 *protop = proto; 3613 return cmd; 3614 } 3615 3616 static ipfw_insn * 3617 add_srcip(ipfw_insn *cmd, char *av, int cblen, struct tidx *tstate) 3618 { 3619 fill_ip((ipfw_insn_ip *)cmd, av, cblen, tstate); 3620 if (cmd->opcode == O_IP_DST_SET) /* set */ 3621 cmd->opcode = O_IP_SRC_SET; 3622 else if (cmd->opcode == O_IP_DST_LOOKUP) /* table */ 3623 cmd->opcode = O_IP_SRC_LOOKUP; 3624 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn)) /* me */ 3625 cmd->opcode = O_IP_SRC_ME; 3626 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_u32)) /* one IP */ 3627 cmd->opcode = O_IP_SRC; 3628 else /* addr/mask */ 3629 cmd->opcode = O_IP_SRC_MASK; 3630 return cmd; 3631 } 3632 3633 static ipfw_insn * 3634 add_dstip(ipfw_insn *cmd, char *av, int cblen, struct tidx *tstate) 3635 { 3636 fill_ip((ipfw_insn_ip *)cmd, av, cblen, tstate); 3637 if (cmd->opcode == O_IP_DST_SET) /* set */ 3638 ; 3639 else if (cmd->opcode == O_IP_DST_LOOKUP) /* table */ 3640 ; 3641 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn)) /* me */ 3642 cmd->opcode = O_IP_DST_ME; 3643 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_u32)) /* one IP */ 3644 cmd->opcode = O_IP_DST; 3645 else /* addr/mask */ 3646 cmd->opcode = O_IP_DST_MASK; 3647 return cmd; 3648 } 3649 3650 static struct _s_x f_reserved_keywords[] = { 3651 { "altq", TOK_OR }, 3652 { "//", TOK_OR }, 3653 { "diverted", TOK_OR }, 3654 { "dst-port", TOK_OR }, 3655 { "src-port", TOK_OR }, 3656 { "established", TOK_OR }, 3657 { "keep-state", TOK_OR }, 3658 { "frag", TOK_OR }, 3659 { "icmptypes", TOK_OR }, 3660 { "in", TOK_OR }, 3661 { "out", TOK_OR }, 3662 { "ip6", TOK_OR }, 3663 { "any", TOK_OR }, 3664 { "to", TOK_OR }, 3665 { "via", TOK_OR }, 3666 { "{", TOK_OR }, 3667 { NULL, 0 } /* terminator */ 3668 }; 3669 3670 static ipfw_insn * 3671 add_ports(ipfw_insn *cmd, char *av, u_char proto, int opcode, int cblen) 3672 { 3673 3674 if (match_token(f_reserved_keywords, av) != -1) 3675 return (NULL); 3676 3677 if (fill_newports((ipfw_insn_u16 *)cmd, av, proto, cblen)) { 3678 /* XXX todo: check that we have a protocol with ports */ 3679 cmd->opcode = opcode; 3680 return cmd; 3681 } 3682 return NULL; 3683 } 3684 3685 static ipfw_insn * 3686 add_src(ipfw_insn *cmd, char *av, u_char proto, int cblen, struct tidx *tstate) 3687 { 3688 struct in6_addr a; 3689 char *host, *ch, buf[INET6_ADDRSTRLEN]; 3690 ipfw_insn *ret = NULL; 3691 int len; 3692 3693 /* Copy first address in set if needed */ 3694 if ((ch = strpbrk(av, "/,")) != NULL) { 3695 len = ch - av; 3696 strlcpy(buf, av, sizeof(buf)); 3697 if (len < sizeof(buf)) 3698 buf[len] = '\0'; 3699 host = buf; 3700 } else 3701 host = av; 3702 3703 if (proto == IPPROTO_IPV6 || strcmp(av, "me6") == 0 || 3704 inet_pton(AF_INET6, host, &a) == 1) 3705 ret = add_srcip6(cmd, av, cblen, tstate); 3706 /* XXX: should check for IPv4, not !IPv6 */ 3707 if (ret == NULL && (proto == IPPROTO_IP || strcmp(av, "me") == 0 || 3708 inet_pton(AF_INET6, host, &a) != 1)) 3709 ret = add_srcip(cmd, av, cblen, tstate); 3710 if (ret == NULL && strcmp(av, "any") != 0) 3711 ret = cmd; 3712 3713 return ret; 3714 } 3715 3716 static ipfw_insn * 3717 add_dst(ipfw_insn *cmd, char *av, u_char proto, int cblen, struct tidx *tstate) 3718 { 3719 struct in6_addr a; 3720 char *host, *ch, buf[INET6_ADDRSTRLEN]; 3721 ipfw_insn *ret = NULL; 3722 int len; 3723 3724 /* Copy first address in set if needed */ 3725 if ((ch = strpbrk(av, "/,")) != NULL) { 3726 len = ch - av; 3727 strlcpy(buf, av, sizeof(buf)); 3728 if (len < sizeof(buf)) 3729 buf[len] = '\0'; 3730 host = buf; 3731 } else 3732 host = av; 3733 3734 if (proto == IPPROTO_IPV6 || strcmp(av, "me6") == 0 || 3735 inet_pton(AF_INET6, host, &a) == 1) 3736 ret = add_dstip6(cmd, av, cblen, tstate); 3737 /* XXX: should check for IPv4, not !IPv6 */ 3738 if (ret == NULL && (proto == IPPROTO_IP || strcmp(av, "me") == 0 || 3739 inet_pton(AF_INET6, host, &a) != 1)) 3740 ret = add_dstip(cmd, av, cblen, tstate); 3741 if (ret == NULL && strcmp(av, "any") != 0) 3742 ret = cmd; 3743 3744 return ret; 3745 } 3746 3747 /* 3748 * Parse arguments and assemble the microinstructions which make up a rule. 3749 * Rules are added into the 'rulebuf' and then copied in the correct order 3750 * into the actual rule. 3751 * 3752 * The syntax for a rule starts with the action, followed by 3753 * optional action parameters, and the various match patterns. 3754 * In the assembled microcode, the first opcode must be an O_PROBE_STATE 3755 * (generated if the rule includes a keep-state option), then the 3756 * various match patterns, log/altq actions, and the actual action. 3757 * 3758 */ 3759 void 3760 compile_rule(char *av[], uint32_t *rbuf, int *rbufsize, struct tidx *tstate) 3761 { 3762 /* 3763 * rules are added into the 'rulebuf' and then copied in 3764 * the correct order into the actual rule. 3765 * Some things that need to go out of order (prob, action etc.) 3766 * go into actbuf[]. 3767 */ 3768 static uint32_t actbuf[255], cmdbuf[255]; 3769 int rblen, ablen, cblen; 3770 3771 ipfw_insn *src, *dst, *cmd, *action, *prev=NULL; 3772 ipfw_insn *first_cmd; /* first match pattern */ 3773 3774 struct ip_fw_rule *rule; 3775 3776 /* 3777 * various flags used to record that we entered some fields. 3778 */ 3779 ipfw_insn *have_state = NULL; /* any state-related option */ 3780 int have_rstate = 0; 3781 ipfw_insn *have_log = NULL, *have_altq = NULL, *have_tag = NULL; 3782 ipfw_insn *have_skipcmd = NULL; 3783 size_t len; 3784 3785 int i; 3786 3787 int open_par = 0; /* open parenthesis ( */ 3788 3789 /* proto is here because it is used to fetch ports */ 3790 u_char proto = IPPROTO_IP; /* default protocol */ 3791 3792 double match_prob = 1; /* match probability, default is always match */ 3793 3794 bzero(actbuf, sizeof(actbuf)); /* actions go here */ 3795 bzero(cmdbuf, sizeof(cmdbuf)); 3796 bzero(rbuf, *rbufsize); 3797 3798 rule = (struct ip_fw_rule *)rbuf; 3799 cmd = (ipfw_insn *)cmdbuf; 3800 action = (ipfw_insn *)actbuf; 3801 3802 rblen = *rbufsize / sizeof(uint32_t); 3803 rblen -= sizeof(struct ip_fw_rule) / sizeof(uint32_t); 3804 ablen = sizeof(actbuf) / sizeof(actbuf[0]); 3805 cblen = sizeof(cmdbuf) / sizeof(cmdbuf[0]); 3806 cblen -= F_INSN_SIZE(ipfw_insn_u32) + 1; 3807 3808 #define CHECK_RBUFLEN(len) { CHECK_LENGTH(rblen, len); rblen -= len; } 3809 #define CHECK_ACTLEN CHECK_LENGTH(ablen, action->len) 3810 3811 av++; 3812 3813 /* [rule N] -- Rule number optional */ 3814 if (av[0] && isdigit(**av)) { 3815 rule->rulenum = atoi(*av); 3816 av++; 3817 } 3818 3819 /* [set N] -- set number (0..RESVD_SET), optional */ 3820 if (av[0] && av[1] && _substrcmp(*av, "set") == 0) { 3821 int set = strtoul(av[1], NULL, 10); 3822 if (set < 0 || set > RESVD_SET) 3823 errx(EX_DATAERR, "illegal set %s", av[1]); 3824 rule->set = set; 3825 tstate->set = set; 3826 av += 2; 3827 } 3828 3829 /* [prob D] -- match probability, optional */ 3830 if (av[0] && av[1] && _substrcmp(*av, "prob") == 0) { 3831 match_prob = strtod(av[1], NULL); 3832 3833 if (match_prob <= 0 || match_prob > 1) 3834 errx(EX_DATAERR, "illegal match prob. %s", av[1]); 3835 av += 2; 3836 } 3837 3838 /* action -- mandatory */ 3839 NEED1("missing action"); 3840 i = match_token(rule_actions, *av); 3841 av++; 3842 action->len = 1; /* default */ 3843 CHECK_ACTLEN; 3844 switch(i) { 3845 case TOK_CHECKSTATE: 3846 have_state = action; 3847 action->opcode = O_CHECK_STATE; 3848 if (*av == NULL || 3849 match_token(rule_options, *av) == TOK_COMMENT) { 3850 action->arg1 = pack_object(tstate, 3851 default_state_name, IPFW_TLV_STATE_NAME); 3852 break; 3853 } 3854 if (*av[0] == ':') { 3855 if (strcmp(*av + 1, "any") == 0) 3856 action->arg1 = 0; 3857 else if (state_check_name(*av + 1) == 0) 3858 action->arg1 = pack_object(tstate, *av + 1, 3859 IPFW_TLV_STATE_NAME); 3860 else 3861 errx(EX_DATAERR, "Invalid state name %s", 3862 *av); 3863 av++; 3864 break; 3865 } 3866 errx(EX_DATAERR, "Invalid state name %s", *av); 3867 break; 3868 3869 case TOK_ABORT: 3870 action->opcode = O_REJECT; 3871 action->arg1 = ICMP_REJECT_ABORT; 3872 break; 3873 3874 case TOK_ABORT6: 3875 action->opcode = O_UNREACH6; 3876 action->arg1 = ICMP6_UNREACH_ABORT; 3877 break; 3878 3879 case TOK_ACCEPT: 3880 action->opcode = O_ACCEPT; 3881 break; 3882 3883 case TOK_DENY: 3884 action->opcode = O_DENY; 3885 action->arg1 = 0; 3886 break; 3887 3888 case TOK_REJECT: 3889 action->opcode = O_REJECT; 3890 action->arg1 = ICMP_UNREACH_HOST; 3891 break; 3892 3893 case TOK_RESET: 3894 action->opcode = O_REJECT; 3895 action->arg1 = ICMP_REJECT_RST; 3896 break; 3897 3898 case TOK_RESET6: 3899 action->opcode = O_UNREACH6; 3900 action->arg1 = ICMP6_UNREACH_RST; 3901 break; 3902 3903 case TOK_UNREACH: 3904 action->opcode = O_REJECT; 3905 NEED1("missing reject code"); 3906 fill_reject_code(&action->arg1, *av); 3907 av++; 3908 break; 3909 3910 case TOK_UNREACH6: 3911 action->opcode = O_UNREACH6; 3912 NEED1("missing unreach code"); 3913 fill_unreach6_code(&action->arg1, *av); 3914 av++; 3915 break; 3916 3917 case TOK_COUNT: 3918 action->opcode = O_COUNT; 3919 break; 3920 3921 case TOK_NAT: 3922 action->opcode = O_NAT; 3923 action->len = F_INSN_SIZE(ipfw_insn_nat); 3924 CHECK_ACTLEN; 3925 if (*av != NULL && _substrcmp(*av, "global") == 0) { 3926 action->arg1 = IP_FW_NAT44_GLOBAL; 3927 av++; 3928 break; 3929 } else 3930 goto chkarg; 3931 case TOK_QUEUE: 3932 action->opcode = O_QUEUE; 3933 goto chkarg; 3934 case TOK_PIPE: 3935 action->opcode = O_PIPE; 3936 goto chkarg; 3937 case TOK_SKIPTO: 3938 action->opcode = O_SKIPTO; 3939 goto chkarg; 3940 case TOK_NETGRAPH: 3941 action->opcode = O_NETGRAPH; 3942 goto chkarg; 3943 case TOK_NGTEE: 3944 action->opcode = O_NGTEE; 3945 goto chkarg; 3946 case TOK_DIVERT: 3947 action->opcode = O_DIVERT; 3948 goto chkarg; 3949 case TOK_TEE: 3950 action->opcode = O_TEE; 3951 goto chkarg; 3952 case TOK_CALL: 3953 action->opcode = O_CALLRETURN; 3954 chkarg: 3955 if (!av[0]) 3956 errx(EX_USAGE, "missing argument for %s", *(av - 1)); 3957 if (isdigit(**av)) { 3958 action->arg1 = strtoul(*av, NULL, 10); 3959 if (action->arg1 <= 0 || action->arg1 >= IP_FW_TABLEARG) 3960 errx(EX_DATAERR, "illegal argument for %s", 3961 *(av - 1)); 3962 } else if (_substrcmp(*av, "tablearg") == 0) { 3963 action->arg1 = IP_FW_TARG; 3964 } else if (i == TOK_DIVERT || i == TOK_TEE) { 3965 struct servent *s; 3966 setservent(1); 3967 s = getservbyname(av[0], "divert"); 3968 if (s != NULL) 3969 action->arg1 = ntohs(s->s_port); 3970 else 3971 errx(EX_DATAERR, "illegal divert/tee port"); 3972 } else 3973 errx(EX_DATAERR, "illegal argument for %s", *(av - 1)); 3974 av++; 3975 break; 3976 3977 case TOK_FORWARD: { 3978 /* 3979 * Locate the address-port separator (':' or ','). 3980 * Could be one of the following: 3981 * hostname:port 3982 * IPv4 a.b.c.d,port 3983 * IPv4 a.b.c.d:port 3984 * IPv6 w:x:y::z,port 3985 * The ':' can only be used with hostname and IPv4 address. 3986 * XXX-BZ Should we also support [w:x:y::z]:port? 3987 */ 3988 struct sockaddr_storage result; 3989 struct addrinfo *res; 3990 char *s, *end; 3991 int family; 3992 u_short port_number; 3993 3994 NEED1("missing forward address[:port]"); 3995 3996 /* 3997 * locate the address-port separator (':' or ',') 3998 */ 3999 s = strchr(*av, ','); 4000 if (s == NULL) { 4001 /* Distinguish between IPv4:port and IPv6 cases. */ 4002 s = strchr(*av, ':'); 4003 if (s && strchr(s+1, ':')) 4004 s = NULL; /* no port */ 4005 } 4006 4007 port_number = 0; 4008 if (s != NULL) { 4009 /* Terminate host portion and set s to start of port. */ 4010 *(s++) = '\0'; 4011 i = strtoport(s, &end, 0 /* base */, 0 /* proto */); 4012 if (s == end) 4013 errx(EX_DATAERR, 4014 "illegal forwarding port ``%s''", s); 4015 port_number = (u_short)i; 4016 } 4017 4018 if (_substrcmp(*av, "tablearg") == 0) { 4019 family = PF_INET; 4020 ((struct sockaddr_in*)&result)->sin_addr.s_addr = 4021 INADDR_ANY; 4022 } else { 4023 /* 4024 * Resolve the host name or address to a family and a 4025 * network representation of the address. 4026 */ 4027 if (getaddrinfo(*av, NULL, NULL, &res)) 4028 errx(EX_DATAERR, NULL); 4029 /* Just use the first host in the answer. */ 4030 family = res->ai_family; 4031 memcpy(&result, res->ai_addr, res->ai_addrlen); 4032 freeaddrinfo(res); 4033 } 4034 4035 if (family == PF_INET) { 4036 ipfw_insn_sa *p = (ipfw_insn_sa *)action; 4037 4038 action->opcode = O_FORWARD_IP; 4039 action->len = F_INSN_SIZE(ipfw_insn_sa); 4040 CHECK_ACTLEN; 4041 4042 /* 4043 * In the kernel we assume AF_INET and use only 4044 * sin_port and sin_addr. Remember to set sin_len as 4045 * the routing code seems to use it too. 4046 */ 4047 p->sa.sin_len = sizeof(struct sockaddr_in); 4048 p->sa.sin_family = AF_INET; 4049 p->sa.sin_port = port_number; 4050 p->sa.sin_addr.s_addr = 4051 ((struct sockaddr_in *)&result)->sin_addr.s_addr; 4052 } else if (family == PF_INET6) { 4053 ipfw_insn_sa6 *p = (ipfw_insn_sa6 *)action; 4054 4055 action->opcode = O_FORWARD_IP6; 4056 action->len = F_INSN_SIZE(ipfw_insn_sa6); 4057 CHECK_ACTLEN; 4058 4059 p->sa.sin6_len = sizeof(struct sockaddr_in6); 4060 p->sa.sin6_family = AF_INET6; 4061 p->sa.sin6_port = port_number; 4062 p->sa.sin6_flowinfo = 0; 4063 p->sa.sin6_scope_id = 4064 ((struct sockaddr_in6 *)&result)->sin6_scope_id; 4065 bcopy(&((struct sockaddr_in6*)&result)->sin6_addr, 4066 &p->sa.sin6_addr, sizeof(p->sa.sin6_addr)); 4067 } else { 4068 errx(EX_DATAERR, "Invalid address family in forward action"); 4069 } 4070 av++; 4071 break; 4072 } 4073 case TOK_COMMENT: 4074 /* pretend it is a 'count' rule followed by the comment */ 4075 action->opcode = O_COUNT; 4076 av--; /* go back... */ 4077 break; 4078 4079 case TOK_SETFIB: 4080 { 4081 int numfibs; 4082 size_t intsize = sizeof(int); 4083 4084 action->opcode = O_SETFIB; 4085 NEED1("missing fib number"); 4086 if (_substrcmp(*av, "tablearg") == 0) { 4087 action->arg1 = IP_FW_TARG; 4088 } else { 4089 action->arg1 = strtoul(*av, NULL, 10); 4090 if (sysctlbyname("net.fibs", &numfibs, &intsize, 4091 NULL, 0) == -1) 4092 errx(EX_DATAERR, "fibs not suported.\n"); 4093 if (action->arg1 >= numfibs) /* Temporary */ 4094 errx(EX_DATAERR, "fib too large.\n"); 4095 /* Add high-order bit to fib to make room for tablearg*/ 4096 action->arg1 |= 0x8000; 4097 } 4098 av++; 4099 break; 4100 } 4101 4102 case TOK_SETDSCP: 4103 { 4104 int code; 4105 4106 action->opcode = O_SETDSCP; 4107 NEED1("missing DSCP code"); 4108 if (_substrcmp(*av, "tablearg") == 0) { 4109 action->arg1 = IP_FW_TARG; 4110 } else { 4111 if (isalpha(*av[0])) { 4112 if ((code = match_token(f_ipdscp, *av)) == -1) 4113 errx(EX_DATAERR, "Unknown DSCP code"); 4114 action->arg1 = code; 4115 } else 4116 action->arg1 = strtoul(*av, NULL, 10); 4117 /* 4118 * Add high-order bit to DSCP to make room 4119 * for tablearg 4120 */ 4121 action->arg1 |= 0x8000; 4122 } 4123 av++; 4124 break; 4125 } 4126 4127 case TOK_REASS: 4128 action->opcode = O_REASS; 4129 break; 4130 4131 case TOK_RETURN: 4132 fill_cmd(action, O_CALLRETURN, F_NOT, 0); 4133 break; 4134 4135 case TOK_TCPSETMSS: { 4136 u_long mss; 4137 uint16_t idx; 4138 4139 idx = pack_object(tstate, "tcp-setmss", IPFW_TLV_EACTION); 4140 if (idx == 0) 4141 errx(EX_DATAERR, "pack_object failed"); 4142 fill_cmd(action, O_EXTERNAL_ACTION, 0, idx); 4143 NEED1("Missing MSS value"); 4144 action = next_cmd(action, &ablen); 4145 action->len = 1; 4146 CHECK_ACTLEN; 4147 mss = strtoul(*av, NULL, 10); 4148 if (mss == 0 || mss > UINT16_MAX) 4149 errx(EX_USAGE, "invalid MSS value %s", *av); 4150 fill_cmd(action, O_EXTERNAL_DATA, 0, (uint16_t)mss); 4151 av++; 4152 break; 4153 } 4154 4155 default: 4156 av--; 4157 if (match_token(rule_eactions, *av) == -1) 4158 errx(EX_DATAERR, "invalid action %s\n", *av); 4159 /* 4160 * External actions support. 4161 * XXX: we support only syntax with instance name. 4162 * For known external actions (from rule_eactions list) 4163 * we can handle syntax directly. But with `eaction' 4164 * keyword we can use only `eaction <name> <instance>' 4165 * syntax. 4166 */ 4167 case TOK_EACTION: { 4168 uint16_t idx; 4169 4170 NEED1("Missing eaction name"); 4171 if (eaction_check_name(*av) != 0) 4172 errx(EX_DATAERR, "Invalid eaction name %s", *av); 4173 idx = pack_object(tstate, *av, IPFW_TLV_EACTION); 4174 if (idx == 0) 4175 errx(EX_DATAERR, "pack_object failed"); 4176 fill_cmd(action, O_EXTERNAL_ACTION, 0, idx); 4177 av++; 4178 NEED1("Missing eaction instance name"); 4179 action = next_cmd(action, &ablen); 4180 action->len = 1; 4181 CHECK_ACTLEN; 4182 if (eaction_check_name(*av) != 0) 4183 errx(EX_DATAERR, "Invalid eaction instance name %s", 4184 *av); 4185 /* 4186 * External action instance object has TLV type depended 4187 * from the external action name object index. Since we 4188 * currently don't know this index, use zero as TLV type. 4189 */ 4190 idx = pack_object(tstate, *av, 0); 4191 if (idx == 0) 4192 errx(EX_DATAERR, "pack_object failed"); 4193 fill_cmd(action, O_EXTERNAL_INSTANCE, 0, idx); 4194 av++; 4195 } 4196 } 4197 action = next_cmd(action, &ablen); 4198 4199 /* 4200 * [altq queuename] -- altq tag, optional 4201 * [log [logamount N]] -- log, optional 4202 * 4203 * If they exist, it go first in the cmdbuf, but then it is 4204 * skipped in the copy section to the end of the buffer. 4205 */ 4206 while (av[0] != NULL && (i = match_token(rule_action_params, *av)) != -1) { 4207 av++; 4208 switch (i) { 4209 case TOK_LOG: 4210 { 4211 ipfw_insn_log *c = (ipfw_insn_log *)cmd; 4212 int l; 4213 4214 if (have_log) 4215 errx(EX_DATAERR, 4216 "log cannot be specified more than once"); 4217 have_log = (ipfw_insn *)c; 4218 cmd->len = F_INSN_SIZE(ipfw_insn_log); 4219 CHECK_CMDLEN; 4220 cmd->opcode = O_LOG; 4221 if (av[0] && _substrcmp(*av, "logamount") == 0) { 4222 av++; 4223 NEED1("logamount requires argument"); 4224 l = atoi(*av); 4225 if (l < 0) 4226 errx(EX_DATAERR, 4227 "logamount must be positive"); 4228 c->max_log = l; 4229 av++; 4230 } else { 4231 len = sizeof(c->max_log); 4232 if (sysctlbyname("net.inet.ip.fw.verbose_limit", 4233 &c->max_log, &len, NULL, 0) == -1) { 4234 if (co.test_only) { 4235 c->max_log = 0; 4236 break; 4237 } 4238 errx(1, "sysctlbyname(\"%s\")", 4239 "net.inet.ip.fw.verbose_limit"); 4240 } 4241 } 4242 } 4243 break; 4244 4245 #ifndef NO_ALTQ 4246 case TOK_ALTQ: 4247 { 4248 ipfw_insn_altq *a = (ipfw_insn_altq *)cmd; 4249 4250 NEED1("missing altq queue name"); 4251 if (have_altq) 4252 errx(EX_DATAERR, 4253 "altq cannot be specified more than once"); 4254 have_altq = (ipfw_insn *)a; 4255 cmd->len = F_INSN_SIZE(ipfw_insn_altq); 4256 CHECK_CMDLEN; 4257 cmd->opcode = O_ALTQ; 4258 a->qid = altq_name_to_qid(*av); 4259 av++; 4260 } 4261 break; 4262 #endif 4263 4264 case TOK_TAG: 4265 case TOK_UNTAG: { 4266 uint16_t tag; 4267 4268 if (have_tag) 4269 errx(EX_USAGE, "tag and untag cannot be " 4270 "specified more than once"); 4271 GET_UINT_ARG(tag, IPFW_ARG_MIN, IPFW_ARG_MAX, i, 4272 rule_action_params); 4273 have_tag = cmd; 4274 fill_cmd(cmd, O_TAG, (i == TOK_TAG) ? 0: F_NOT, tag); 4275 av++; 4276 break; 4277 } 4278 4279 default: 4280 abort(); 4281 } 4282 cmd = next_cmd(cmd, &cblen); 4283 } 4284 4285 if (have_state) { /* must be a check-state, we are done */ 4286 if (*av != NULL && 4287 match_token(rule_options, *av) == TOK_COMMENT) { 4288 /* check-state has a comment */ 4289 av++; 4290 fill_comment(cmd, av, cblen); 4291 cmd = next_cmd(cmd, &cblen); 4292 av[0] = NULL; 4293 } 4294 goto done; 4295 } 4296 4297 #define OR_START(target) \ 4298 if (av[0] && (*av[0] == '(' || *av[0] == '{')) { \ 4299 if (open_par) \ 4300 errx(EX_USAGE, "nested \"(\" not allowed\n"); \ 4301 prev = NULL; \ 4302 open_par = 1; \ 4303 if ( (av[0])[1] == '\0') { \ 4304 av++; \ 4305 } else \ 4306 (*av)++; \ 4307 } \ 4308 target: \ 4309 4310 4311 #define CLOSE_PAR \ 4312 if (open_par) { \ 4313 if (av[0] && ( \ 4314 strcmp(*av, ")") == 0 || \ 4315 strcmp(*av, "}") == 0)) { \ 4316 prev = NULL; \ 4317 open_par = 0; \ 4318 av++; \ 4319 } else \ 4320 errx(EX_USAGE, "missing \")\"\n"); \ 4321 } 4322 4323 #define NOT_BLOCK \ 4324 if (av[0] && _substrcmp(*av, "not") == 0) { \ 4325 if (cmd->len & F_NOT) \ 4326 errx(EX_USAGE, "double \"not\" not allowed\n"); \ 4327 cmd->len |= F_NOT; \ 4328 av++; \ 4329 } 4330 4331 #define OR_BLOCK(target) \ 4332 if (av[0] && _substrcmp(*av, "or") == 0) { \ 4333 if (prev == NULL || open_par == 0) \ 4334 errx(EX_DATAERR, "invalid OR block"); \ 4335 prev->len |= F_OR; \ 4336 av++; \ 4337 goto target; \ 4338 } \ 4339 CLOSE_PAR; 4340 4341 first_cmd = cmd; 4342 4343 #if 0 4344 /* 4345 * MAC addresses, optional. 4346 * If we have this, we skip the part "proto from src to dst" 4347 * and jump straight to the option parsing. 4348 */ 4349 NOT_BLOCK; 4350 NEED1("missing protocol"); 4351 if (_substrcmp(*av, "MAC") == 0 || 4352 _substrcmp(*av, "mac") == 0) { 4353 av++; /* the "MAC" keyword */ 4354 add_mac(cmd, av); /* exits in case of errors */ 4355 cmd = next_cmd(cmd); 4356 av += 2; /* dst-mac and src-mac */ 4357 NOT_BLOCK; 4358 NEED1("missing mac type"); 4359 if (add_mactype(cmd, av[0])) 4360 cmd = next_cmd(cmd); 4361 av++; /* any or mac-type */ 4362 goto read_options; 4363 } 4364 #endif 4365 4366 /* 4367 * protocol, mandatory 4368 */ 4369 OR_START(get_proto); 4370 NOT_BLOCK; 4371 NEED1("missing protocol"); 4372 if (add_proto_compat(cmd, *av, &proto)) { 4373 av++; 4374 if (F_LEN(cmd) != 0) { 4375 prev = cmd; 4376 cmd = next_cmd(cmd, &cblen); 4377 } 4378 } else if (first_cmd != cmd) { 4379 errx(EX_DATAERR, "invalid protocol ``%s''", *av); 4380 } else { 4381 rule->flags |= IPFW_RULE_JUSTOPTS; 4382 goto read_options; 4383 } 4384 OR_BLOCK(get_proto); 4385 4386 /* 4387 * "from", mandatory 4388 */ 4389 if ((av[0] == NULL) || _substrcmp(*av, "from") != 0) 4390 errx(EX_USAGE, "missing ``from''"); 4391 av++; 4392 4393 /* 4394 * source IP, mandatory 4395 */ 4396 OR_START(source_ip); 4397 NOT_BLOCK; /* optional "not" */ 4398 NEED1("missing source address"); 4399 if (add_src(cmd, *av, proto, cblen, tstate)) { 4400 av++; 4401 if (F_LEN(cmd) != 0) { /* ! any */ 4402 prev = cmd; 4403 cmd = next_cmd(cmd, &cblen); 4404 } 4405 } else 4406 errx(EX_USAGE, "bad source address %s", *av); 4407 OR_BLOCK(source_ip); 4408 4409 /* 4410 * source ports, optional 4411 */ 4412 NOT_BLOCK; /* optional "not" */ 4413 if ( av[0] != NULL ) { 4414 if (_substrcmp(*av, "any") == 0 || 4415 add_ports(cmd, *av, proto, O_IP_SRCPORT, cblen)) { 4416 av++; 4417 if (F_LEN(cmd) != 0) 4418 cmd = next_cmd(cmd, &cblen); 4419 } 4420 } 4421 4422 /* 4423 * "to", mandatory 4424 */ 4425 if ( (av[0] == NULL) || _substrcmp(*av, "to") != 0 ) 4426 errx(EX_USAGE, "missing ``to''"); 4427 av++; 4428 4429 /* 4430 * destination, mandatory 4431 */ 4432 OR_START(dest_ip); 4433 NOT_BLOCK; /* optional "not" */ 4434 NEED1("missing dst address"); 4435 if (add_dst(cmd, *av, proto, cblen, tstate)) { 4436 av++; 4437 if (F_LEN(cmd) != 0) { /* ! any */ 4438 prev = cmd; 4439 cmd = next_cmd(cmd, &cblen); 4440 } 4441 } else 4442 errx( EX_USAGE, "bad destination address %s", *av); 4443 OR_BLOCK(dest_ip); 4444 4445 /* 4446 * dest. ports, optional 4447 */ 4448 NOT_BLOCK; /* optional "not" */ 4449 if (av[0]) { 4450 if (_substrcmp(*av, "any") == 0 || 4451 add_ports(cmd, *av, proto, O_IP_DSTPORT, cblen)) { 4452 av++; 4453 if (F_LEN(cmd) != 0) 4454 cmd = next_cmd(cmd, &cblen); 4455 } 4456 } 4457 4458 read_options: 4459 prev = NULL; 4460 while ( av[0] != NULL ) { 4461 char *s; 4462 ipfw_insn_u32 *cmd32; /* alias for cmd */ 4463 4464 s = *av; 4465 cmd32 = (ipfw_insn_u32 *)cmd; 4466 4467 if (*s == '!') { /* alternate syntax for NOT */ 4468 if (cmd->len & F_NOT) 4469 errx(EX_USAGE, "double \"not\" not allowed\n"); 4470 cmd->len = F_NOT; 4471 s++; 4472 } 4473 i = match_token(rule_options, s); 4474 av++; 4475 switch(i) { 4476 case TOK_NOT: 4477 if (cmd->len & F_NOT) 4478 errx(EX_USAGE, "double \"not\" not allowed\n"); 4479 cmd->len = F_NOT; 4480 break; 4481 4482 case TOK_OR: 4483 if (open_par == 0 || prev == NULL) 4484 errx(EX_USAGE, "invalid \"or\" block\n"); 4485 prev->len |= F_OR; 4486 break; 4487 4488 case TOK_STARTBRACE: 4489 if (open_par) 4490 errx(EX_USAGE, "+nested \"(\" not allowed\n"); 4491 open_par = 1; 4492 break; 4493 4494 case TOK_ENDBRACE: 4495 if (!open_par) 4496 errx(EX_USAGE, "+missing \")\"\n"); 4497 open_par = 0; 4498 prev = NULL; 4499 break; 4500 4501 case TOK_IN: 4502 fill_cmd(cmd, O_IN, 0, 0); 4503 break; 4504 4505 case TOK_OUT: 4506 cmd->len ^= F_NOT; /* toggle F_NOT */ 4507 fill_cmd(cmd, O_IN, 0, 0); 4508 break; 4509 4510 case TOK_DIVERTED: 4511 fill_cmd(cmd, O_DIVERTED, 0, 3); 4512 break; 4513 4514 case TOK_DIVERTEDLOOPBACK: 4515 fill_cmd(cmd, O_DIVERTED, 0, 1); 4516 break; 4517 4518 case TOK_DIVERTEDOUTPUT: 4519 fill_cmd(cmd, O_DIVERTED, 0, 2); 4520 break; 4521 4522 case TOK_FRAG: 4523 fill_cmd(cmd, O_FRAG, 0, 0); 4524 break; 4525 4526 case TOK_LAYER2: 4527 fill_cmd(cmd, O_LAYER2, 0, 0); 4528 break; 4529 4530 case TOK_XMIT: 4531 case TOK_RECV: 4532 case TOK_VIA: 4533 NEED1("recv, xmit, via require interface name" 4534 " or address"); 4535 fill_iface((ipfw_insn_if *)cmd, av[0], cblen, tstate); 4536 av++; 4537 if (F_LEN(cmd) == 0) /* not a valid address */ 4538 break; 4539 if (i == TOK_XMIT) 4540 cmd->opcode = O_XMIT; 4541 else if (i == TOK_RECV) 4542 cmd->opcode = O_RECV; 4543 else if (i == TOK_VIA) 4544 cmd->opcode = O_VIA; 4545 break; 4546 4547 case TOK_ICMPTYPES: 4548 NEED1("icmptypes requires list of types"); 4549 fill_icmptypes((ipfw_insn_u32 *)cmd, *av); 4550 av++; 4551 break; 4552 4553 case TOK_ICMP6TYPES: 4554 NEED1("icmptypes requires list of types"); 4555 fill_icmp6types((ipfw_insn_icmp6 *)cmd, *av, cblen); 4556 av++; 4557 break; 4558 4559 case TOK_IPTTL: 4560 NEED1("ipttl requires TTL"); 4561 if (strpbrk(*av, "-,")) { 4562 if (!add_ports(cmd, *av, 0, O_IPTTL, cblen)) 4563 errx(EX_DATAERR, "invalid ipttl %s", *av); 4564 } else 4565 fill_cmd(cmd, O_IPTTL, 0, strtoul(*av, NULL, 0)); 4566 av++; 4567 break; 4568 4569 case TOK_IPID: 4570 NEED1("ipid requires id"); 4571 if (strpbrk(*av, "-,")) { 4572 if (!add_ports(cmd, *av, 0, O_IPID, cblen)) 4573 errx(EX_DATAERR, "invalid ipid %s", *av); 4574 } else 4575 fill_cmd(cmd, O_IPID, 0, strtoul(*av, NULL, 0)); 4576 av++; 4577 break; 4578 4579 case TOK_IPLEN: 4580 NEED1("iplen requires length"); 4581 if (strpbrk(*av, "-,")) { 4582 if (!add_ports(cmd, *av, 0, O_IPLEN, cblen)) 4583 errx(EX_DATAERR, "invalid ip len %s", *av); 4584 } else 4585 fill_cmd(cmd, O_IPLEN, 0, strtoul(*av, NULL, 0)); 4586 av++; 4587 break; 4588 4589 case TOK_IPVER: 4590 NEED1("ipver requires version"); 4591 fill_cmd(cmd, O_IPVER, 0, strtoul(*av, NULL, 0)); 4592 av++; 4593 break; 4594 4595 case TOK_IPPRECEDENCE: 4596 NEED1("ipprecedence requires value"); 4597 fill_cmd(cmd, O_IPPRECEDENCE, 0, 4598 (strtoul(*av, NULL, 0) & 7) << 5); 4599 av++; 4600 break; 4601 4602 case TOK_DSCP: 4603 NEED1("missing DSCP code"); 4604 fill_dscp(cmd, *av, cblen); 4605 av++; 4606 break; 4607 4608 case TOK_IPOPTS: 4609 NEED1("missing argument for ipoptions"); 4610 fill_flags_cmd(cmd, O_IPOPT, f_ipopts, *av); 4611 av++; 4612 break; 4613 4614 case TOK_IPTOS: 4615 NEED1("missing argument for iptos"); 4616 fill_flags_cmd(cmd, O_IPTOS, f_iptos, *av); 4617 av++; 4618 break; 4619 4620 case TOK_UID: 4621 NEED1("uid requires argument"); 4622 { 4623 char *end; 4624 uid_t uid; 4625 struct passwd *pwd; 4626 4627 cmd->opcode = O_UID; 4628 uid = strtoul(*av, &end, 0); 4629 pwd = (*end == '\0') ? getpwuid(uid) : getpwnam(*av); 4630 if (pwd == NULL) 4631 errx(EX_DATAERR, "uid \"%s\" nonexistent", *av); 4632 cmd32->d[0] = pwd->pw_uid; 4633 cmd->len |= F_INSN_SIZE(ipfw_insn_u32); 4634 av++; 4635 } 4636 break; 4637 4638 case TOK_GID: 4639 NEED1("gid requires argument"); 4640 { 4641 char *end; 4642 gid_t gid; 4643 struct group *grp; 4644 4645 cmd->opcode = O_GID; 4646 gid = strtoul(*av, &end, 0); 4647 grp = (*end == '\0') ? getgrgid(gid) : getgrnam(*av); 4648 if (grp == NULL) 4649 errx(EX_DATAERR, "gid \"%s\" nonexistent", *av); 4650 cmd32->d[0] = grp->gr_gid; 4651 cmd->len |= F_INSN_SIZE(ipfw_insn_u32); 4652 av++; 4653 } 4654 break; 4655 4656 case TOK_JAIL: 4657 NEED1("jail requires argument"); 4658 { 4659 int jid; 4660 4661 cmd->opcode = O_JAIL; 4662 jid = jail_getid(*av); 4663 if (jid < 0) 4664 errx(EX_DATAERR, "%s", jail_errmsg); 4665 cmd32->d[0] = (uint32_t)jid; 4666 cmd->len |= F_INSN_SIZE(ipfw_insn_u32); 4667 av++; 4668 } 4669 break; 4670 4671 case TOK_ESTAB: 4672 fill_cmd(cmd, O_ESTAB, 0, 0); 4673 break; 4674 4675 case TOK_SETUP: 4676 fill_cmd(cmd, O_TCPFLAGS, 0, 4677 (TH_SYN) | ( (TH_ACK) & 0xff) <<8 ); 4678 break; 4679 4680 case TOK_TCPDATALEN: 4681 NEED1("tcpdatalen requires length"); 4682 if (strpbrk(*av, "-,")) { 4683 if (!add_ports(cmd, *av, 0, O_TCPDATALEN, cblen)) 4684 errx(EX_DATAERR, "invalid tcpdata len %s", *av); 4685 } else 4686 fill_cmd(cmd, O_TCPDATALEN, 0, 4687 strtoul(*av, NULL, 0)); 4688 av++; 4689 break; 4690 4691 case TOK_TCPOPTS: 4692 NEED1("missing argument for tcpoptions"); 4693 fill_flags_cmd(cmd, O_TCPOPTS, f_tcpopts, *av); 4694 av++; 4695 break; 4696 4697 case TOK_TCPSEQ: 4698 case TOK_TCPACK: 4699 NEED1("tcpseq/tcpack requires argument"); 4700 cmd->len = F_INSN_SIZE(ipfw_insn_u32); 4701 cmd->opcode = (i == TOK_TCPSEQ) ? O_TCPSEQ : O_TCPACK; 4702 cmd32->d[0] = htonl(strtoul(*av, NULL, 0)); 4703 av++; 4704 break; 4705 4706 case TOK_TCPWIN: 4707 NEED1("tcpwin requires length"); 4708 if (strpbrk(*av, "-,")) { 4709 if (!add_ports(cmd, *av, 0, O_TCPWIN, cblen)) 4710 errx(EX_DATAERR, "invalid tcpwin len %s", *av); 4711 } else 4712 fill_cmd(cmd, O_TCPWIN, 0, 4713 strtoul(*av, NULL, 0)); 4714 av++; 4715 break; 4716 4717 case TOK_TCPFLAGS: 4718 NEED1("missing argument for tcpflags"); 4719 cmd->opcode = O_TCPFLAGS; 4720 fill_flags_cmd(cmd, O_TCPFLAGS, f_tcpflags, *av); 4721 av++; 4722 break; 4723 4724 case TOK_KEEPSTATE: 4725 case TOK_RECORDSTATE: { 4726 uint16_t uidx; 4727 4728 if (open_par) 4729 errx(EX_USAGE, "keep-state or record-state cannot be part " 4730 "of an or block"); 4731 if (have_state) 4732 errx(EX_USAGE, "only one of keep-state, record-state, " 4733 " limit and set-limit is allowed"); 4734 if (*av != NULL && *av[0] == ':') { 4735 if (state_check_name(*av + 1) != 0) 4736 errx(EX_DATAERR, 4737 "Invalid state name %s", *av); 4738 uidx = pack_object(tstate, *av + 1, 4739 IPFW_TLV_STATE_NAME); 4740 av++; 4741 } else 4742 uidx = pack_object(tstate, default_state_name, 4743 IPFW_TLV_STATE_NAME); 4744 have_state = cmd; 4745 have_rstate = i == TOK_RECORDSTATE; 4746 fill_cmd(cmd, O_KEEP_STATE, 0, uidx); 4747 break; 4748 } 4749 4750 case TOK_LIMIT: 4751 case TOK_SETLIMIT: { 4752 ipfw_insn_limit *c = (ipfw_insn_limit *)cmd; 4753 int val; 4754 4755 if (open_par) 4756 errx(EX_USAGE, 4757 "limit or set-limit cannot be part of an or block"); 4758 if (have_state) 4759 errx(EX_USAGE, "only one of keep-state, record-state, " 4760 " limit and set-limit is allowed"); 4761 have_state = cmd; 4762 have_rstate = i == TOK_SETLIMIT; 4763 4764 cmd->len = F_INSN_SIZE(ipfw_insn_limit); 4765 CHECK_CMDLEN; 4766 cmd->opcode = O_LIMIT; 4767 c->limit_mask = c->conn_limit = 0; 4768 4769 while ( av[0] != NULL ) { 4770 if ((val = match_token(limit_masks, *av)) <= 0) 4771 break; 4772 c->limit_mask |= val; 4773 av++; 4774 } 4775 4776 if (c->limit_mask == 0) 4777 errx(EX_USAGE, "limit: missing limit mask"); 4778 4779 GET_UINT_ARG(c->conn_limit, IPFW_ARG_MIN, IPFW_ARG_MAX, 4780 TOK_LIMIT, rule_options); 4781 av++; 4782 4783 if (*av != NULL && *av[0] == ':') { 4784 if (state_check_name(*av + 1) != 0) 4785 errx(EX_DATAERR, 4786 "Invalid state name %s", *av); 4787 cmd->arg1 = pack_object(tstate, *av + 1, 4788 IPFW_TLV_STATE_NAME); 4789 av++; 4790 } else 4791 cmd->arg1 = pack_object(tstate, 4792 default_state_name, IPFW_TLV_STATE_NAME); 4793 break; 4794 } 4795 4796 case TOK_PROTO: 4797 NEED1("missing protocol"); 4798 if (add_proto(cmd, *av, &proto)) { 4799 av++; 4800 } else 4801 errx(EX_DATAERR, "invalid protocol ``%s''", 4802 *av); 4803 break; 4804 4805 case TOK_SRCIP: 4806 NEED1("missing source IP"); 4807 if (add_srcip(cmd, *av, cblen, tstate)) { 4808 av++; 4809 } 4810 break; 4811 4812 case TOK_DSTIP: 4813 NEED1("missing destination IP"); 4814 if (add_dstip(cmd, *av, cblen, tstate)) { 4815 av++; 4816 } 4817 break; 4818 4819 case TOK_SRCIP6: 4820 NEED1("missing source IP6"); 4821 if (add_srcip6(cmd, *av, cblen, tstate)) { 4822 av++; 4823 } 4824 break; 4825 4826 case TOK_DSTIP6: 4827 NEED1("missing destination IP6"); 4828 if (add_dstip6(cmd, *av, cblen, tstate)) { 4829 av++; 4830 } 4831 break; 4832 4833 case TOK_SRCPORT: 4834 NEED1("missing source port"); 4835 if (_substrcmp(*av, "any") == 0 || 4836 add_ports(cmd, *av, proto, O_IP_SRCPORT, cblen)) { 4837 av++; 4838 } else 4839 errx(EX_DATAERR, "invalid source port %s", *av); 4840 break; 4841 4842 case TOK_DSTPORT: 4843 NEED1("missing destination port"); 4844 if (_substrcmp(*av, "any") == 0 || 4845 add_ports(cmd, *av, proto, O_IP_DSTPORT, cblen)) { 4846 av++; 4847 } else 4848 errx(EX_DATAERR, "invalid destination port %s", 4849 *av); 4850 break; 4851 4852 case TOK_MAC: 4853 if (add_mac(cmd, av, cblen)) 4854 av += 2; 4855 break; 4856 4857 case TOK_MACTYPE: 4858 NEED1("missing mac type"); 4859 if (!add_mactype(cmd, *av, cblen)) 4860 errx(EX_DATAERR, "invalid mac type %s", *av); 4861 av++; 4862 break; 4863 4864 case TOK_VERREVPATH: 4865 fill_cmd(cmd, O_VERREVPATH, 0, 0); 4866 break; 4867 4868 case TOK_VERSRCREACH: 4869 fill_cmd(cmd, O_VERSRCREACH, 0, 0); 4870 break; 4871 4872 case TOK_ANTISPOOF: 4873 fill_cmd(cmd, O_ANTISPOOF, 0, 0); 4874 break; 4875 4876 case TOK_IPSEC: 4877 fill_cmd(cmd, O_IPSEC, 0, 0); 4878 break; 4879 4880 case TOK_IPV6: 4881 fill_cmd(cmd, O_IP6, 0, 0); 4882 break; 4883 4884 case TOK_IPV4: 4885 fill_cmd(cmd, O_IP4, 0, 0); 4886 break; 4887 4888 case TOK_EXT6HDR: 4889 fill_ext6hdr( cmd, *av ); 4890 av++; 4891 break; 4892 4893 case TOK_FLOWID: 4894 if (proto != IPPROTO_IPV6 ) 4895 errx( EX_USAGE, "flow-id filter is active " 4896 "only for ipv6 protocol\n"); 4897 fill_flow6( (ipfw_insn_u32 *) cmd, *av, cblen); 4898 av++; 4899 break; 4900 4901 case TOK_COMMENT: 4902 fill_comment(cmd, av, cblen); 4903 av[0]=NULL; 4904 break; 4905 4906 case TOK_TAGGED: 4907 if (av[0] && strpbrk(*av, "-,")) { 4908 if (!add_ports(cmd, *av, 0, O_TAGGED, cblen)) 4909 errx(EX_DATAERR, "tagged: invalid tag" 4910 " list: %s", *av); 4911 } 4912 else { 4913 uint16_t tag; 4914 4915 GET_UINT_ARG(tag, IPFW_ARG_MIN, IPFW_ARG_MAX, 4916 TOK_TAGGED, rule_options); 4917 fill_cmd(cmd, O_TAGGED, 0, tag); 4918 } 4919 av++; 4920 break; 4921 4922 case TOK_FIB: 4923 NEED1("fib requires fib number"); 4924 fill_cmd(cmd, O_FIB, 0, strtoul(*av, NULL, 0)); 4925 av++; 4926 break; 4927 case TOK_SOCKARG: 4928 fill_cmd(cmd, O_SOCKARG, 0, 0); 4929 break; 4930 4931 case TOK_LOOKUP: { 4932 ipfw_insn_u32 *c = (ipfw_insn_u32 *)cmd; 4933 int j; 4934 4935 if (!av[0] || !av[1]) 4936 errx(EX_USAGE, "format: lookup argument tablenum"); 4937 cmd->opcode = O_IP_DST_LOOKUP; 4938 cmd->len |= F_INSN_SIZE(ipfw_insn) + 2; 4939 i = match_token(rule_options, *av); 4940 for (j = 0; lookup_key[j] >= 0 ; j++) { 4941 if (i == lookup_key[j]) 4942 break; 4943 } 4944 if (lookup_key[j] <= 0) 4945 errx(EX_USAGE, "format: cannot lookup on %s", *av); 4946 __PAST_END(c->d, 1) = j; // i converted to option 4947 av++; 4948 4949 if ((j = pack_table(tstate, *av)) == 0) 4950 errx(EX_DATAERR, "Invalid table name: %s", *av); 4951 4952 cmd->arg1 = j; 4953 av++; 4954 } 4955 break; 4956 case TOK_FLOW: 4957 NEED1("missing table name"); 4958 if (strncmp(*av, "table(", 6) != 0) 4959 errx(EX_DATAERR, 4960 "enclose table name into \"table()\""); 4961 fill_table(cmd, *av, O_IP_FLOW_LOOKUP, tstate); 4962 av++; 4963 break; 4964 4965 case TOK_SKIPACTION: 4966 if (have_skipcmd) 4967 errx(EX_USAGE, "only one defer-action " 4968 "is allowed"); 4969 have_skipcmd = cmd; 4970 fill_cmd(cmd, O_SKIP_ACTION, 0, 0); 4971 break; 4972 4973 default: 4974 errx(EX_USAGE, "unrecognised option [%d] %s\n", i, s); 4975 } 4976 if (F_LEN(cmd) > 0) { /* prepare to advance */ 4977 prev = cmd; 4978 cmd = next_cmd(cmd, &cblen); 4979 } 4980 } 4981 4982 done: 4983 4984 if (!have_state && have_skipcmd) 4985 warnx("Rule contains \"defer-immediate-action\" " 4986 "and doesn't contain any state-related options."); 4987 4988 /* 4989 * Now copy stuff into the rule. 4990 * If we have a keep-state option, the first instruction 4991 * must be a PROBE_STATE (which is generated here). 4992 * If we have a LOG option, it was stored as the first command, 4993 * and now must be moved to the top of the action part. 4994 */ 4995 dst = (ipfw_insn *)rule->cmd; 4996 4997 /* 4998 * First thing to write into the command stream is the match probability. 4999 */ 5000 if (match_prob != 1) { /* 1 means always match */ 5001 dst->opcode = O_PROB; 5002 dst->len = 2; 5003 *((int32_t *)(dst+1)) = (int32_t)(match_prob * 0x7fffffff); 5004 dst += dst->len; 5005 } 5006 5007 /* 5008 * generate O_PROBE_STATE if necessary 5009 */ 5010 if (have_state && have_state->opcode != O_CHECK_STATE && !have_rstate) { 5011 fill_cmd(dst, O_PROBE_STATE, 0, have_state->arg1); 5012 dst = next_cmd(dst, &rblen); 5013 } 5014 5015 /* 5016 * copy all commands but O_LOG, O_KEEP_STATE, O_LIMIT, O_ALTQ, O_TAG, 5017 * O_SKIP_ACTION 5018 */ 5019 for (src = (ipfw_insn *)cmdbuf; src != cmd; src += i) { 5020 i = F_LEN(src); 5021 CHECK_RBUFLEN(i); 5022 5023 switch (src->opcode) { 5024 case O_LOG: 5025 case O_KEEP_STATE: 5026 case O_LIMIT: 5027 case O_ALTQ: 5028 case O_TAG: 5029 case O_SKIP_ACTION: 5030 break; 5031 default: 5032 bcopy(src, dst, i * sizeof(uint32_t)); 5033 dst += i; 5034 } 5035 } 5036 5037 /* 5038 * put back the have_state command as last opcode 5039 */ 5040 if (have_state && have_state->opcode != O_CHECK_STATE) { 5041 i = F_LEN(have_state); 5042 CHECK_RBUFLEN(i); 5043 bcopy(have_state, dst, i * sizeof(uint32_t)); 5044 dst += i; 5045 } 5046 5047 /* 5048 * put back the have_skipcmd command as very last opcode 5049 */ 5050 if (have_skipcmd) { 5051 i = F_LEN(have_skipcmd); 5052 CHECK_RBUFLEN(i); 5053 bcopy(have_skipcmd, dst, i * sizeof(uint32_t)); 5054 dst += i; 5055 } 5056 5057 /* 5058 * start action section 5059 */ 5060 rule->act_ofs = dst - rule->cmd; 5061 5062 /* put back O_LOG, O_ALTQ, O_TAG if necessary */ 5063 if (have_log) { 5064 i = F_LEN(have_log); 5065 CHECK_RBUFLEN(i); 5066 bcopy(have_log, dst, i * sizeof(uint32_t)); 5067 dst += i; 5068 } 5069 if (have_altq) { 5070 i = F_LEN(have_altq); 5071 CHECK_RBUFLEN(i); 5072 bcopy(have_altq, dst, i * sizeof(uint32_t)); 5073 dst += i; 5074 } 5075 if (have_tag) { 5076 i = F_LEN(have_tag); 5077 CHECK_RBUFLEN(i); 5078 bcopy(have_tag, dst, i * sizeof(uint32_t)); 5079 dst += i; 5080 } 5081 5082 /* 5083 * copy all other actions 5084 */ 5085 for (src = (ipfw_insn *)actbuf; src != action; src += i) { 5086 i = F_LEN(src); 5087 CHECK_RBUFLEN(i); 5088 bcopy(src, dst, i * sizeof(uint32_t)); 5089 dst += i; 5090 } 5091 5092 rule->cmd_len = (uint32_t *)dst - (uint32_t *)(rule->cmd); 5093 *rbufsize = (char *)dst - (char *)rule; 5094 } 5095 5096 static int 5097 compare_ntlv(const void *_a, const void *_b) 5098 { 5099 ipfw_obj_ntlv *a, *b; 5100 5101 a = (ipfw_obj_ntlv *)_a; 5102 b = (ipfw_obj_ntlv *)_b; 5103 5104 if (a->set < b->set) 5105 return (-1); 5106 else if (a->set > b->set) 5107 return (1); 5108 5109 if (a->idx < b->idx) 5110 return (-1); 5111 else if (a->idx > b->idx) 5112 return (1); 5113 5114 if (a->head.type < b->head.type) 5115 return (-1); 5116 else if (a->head.type > b->head.type) 5117 return (1); 5118 5119 return (0); 5120 } 5121 5122 /* 5123 * Provide kernel with sorted list of referenced objects 5124 */ 5125 static void 5126 object_sort_ctlv(ipfw_obj_ctlv *ctlv) 5127 { 5128 5129 qsort(ctlv + 1, ctlv->count, ctlv->objsize, compare_ntlv); 5130 } 5131 5132 struct object_kt { 5133 uint16_t uidx; 5134 uint16_t type; 5135 }; 5136 static int 5137 compare_object_kntlv(const void *k, const void *v) 5138 { 5139 ipfw_obj_ntlv *ntlv; 5140 struct object_kt key; 5141 5142 key = *((struct object_kt *)k); 5143 ntlv = (ipfw_obj_ntlv *)v; 5144 5145 if (key.uidx < ntlv->idx) 5146 return (-1); 5147 else if (key.uidx > ntlv->idx) 5148 return (1); 5149 5150 if (key.type < ntlv->head.type) 5151 return (-1); 5152 else if (key.type > ntlv->head.type) 5153 return (1); 5154 5155 return (0); 5156 } 5157 5158 /* 5159 * Finds object name in @ctlv by @idx and @type. 5160 * Uses the following facts: 5161 * 1) All TLVs are the same size 5162 * 2) Kernel implementation provides already sorted list. 5163 * 5164 * Returns table name or NULL. 5165 */ 5166 static char * 5167 object_search_ctlv(ipfw_obj_ctlv *ctlv, uint16_t idx, uint16_t type) 5168 { 5169 ipfw_obj_ntlv *ntlv; 5170 struct object_kt key; 5171 5172 key.uidx = idx; 5173 key.type = type; 5174 5175 ntlv = bsearch(&key, (ctlv + 1), ctlv->count, ctlv->objsize, 5176 compare_object_kntlv); 5177 5178 if (ntlv != NULL) 5179 return (ntlv->name); 5180 5181 return (NULL); 5182 } 5183 5184 static char * 5185 table_search_ctlv(ipfw_obj_ctlv *ctlv, uint16_t idx) 5186 { 5187 5188 return (object_search_ctlv(ctlv, idx, IPFW_TLV_TBL_NAME)); 5189 } 5190 5191 /* 5192 * Adds one or more rules to ipfw chain. 5193 * Data layout: 5194 * Request: 5195 * [ 5196 * ip_fw3_opheader 5197 * [ ipfw_obj_ctlv(IPFW_TLV_TBL_LIST) ipfw_obj_ntlv x N ] (optional *1) 5198 * [ ipfw_obj_ctlv(IPFW_TLV_RULE_LIST) [ ip_fw_rule ip_fw_insn ] x N ] (*2) (*3) 5199 * ] 5200 * Reply: 5201 * [ 5202 * ip_fw3_opheader 5203 * [ ipfw_obj_ctlv(IPFW_TLV_TBL_LIST) ipfw_obj_ntlv x N ] (optional) 5204 * [ ipfw_obj_ctlv(IPFW_TLV_RULE_LIST) [ ip_fw_rule ip_fw_insn ] x N ] 5205 * ] 5206 * 5207 * Rules in reply are modified to store their actual ruleset number. 5208 * 5209 * (*1) TLVs inside IPFW_TLV_TBL_LIST needs to be sorted ascending 5210 * according to their idx field and there has to be no duplicates. 5211 * (*2) Numbered rules inside IPFW_TLV_RULE_LIST needs to be sorted ascending. 5212 * (*3) Each ip_fw structure needs to be aligned to u64 boundary. 5213 */ 5214 void 5215 ipfw_add(char *av[]) 5216 { 5217 uint32_t rulebuf[1024]; 5218 int rbufsize, default_off, tlen, rlen; 5219 size_t sz; 5220 struct tidx ts; 5221 struct ip_fw_rule *rule; 5222 caddr_t tbuf; 5223 ip_fw3_opheader *op3; 5224 ipfw_obj_ctlv *ctlv, *tstate; 5225 5226 rbufsize = sizeof(rulebuf); 5227 memset(rulebuf, 0, rbufsize); 5228 memset(&ts, 0, sizeof(ts)); 5229 5230 /* Optimize case with no tables */ 5231 default_off = sizeof(ipfw_obj_ctlv) + sizeof(ip_fw3_opheader); 5232 op3 = (ip_fw3_opheader *)rulebuf; 5233 ctlv = (ipfw_obj_ctlv *)(op3 + 1); 5234 rule = (struct ip_fw_rule *)(ctlv + 1); 5235 rbufsize -= default_off; 5236 5237 compile_rule(av, (uint32_t *)rule, &rbufsize, &ts); 5238 /* Align rule size to u64 boundary */ 5239 rlen = roundup2(rbufsize, sizeof(uint64_t)); 5240 5241 tbuf = NULL; 5242 sz = 0; 5243 tstate = NULL; 5244 if (ts.count != 0) { 5245 /* Some tables. We have to alloc more data */ 5246 tlen = ts.count * sizeof(ipfw_obj_ntlv); 5247 sz = default_off + sizeof(ipfw_obj_ctlv) + tlen + rlen; 5248 5249 if ((tbuf = calloc(1, sz)) == NULL) 5250 err(EX_UNAVAILABLE, "malloc() failed for IP_FW_ADD"); 5251 op3 = (ip_fw3_opheader *)tbuf; 5252 /* Tables first */ 5253 ctlv = (ipfw_obj_ctlv *)(op3 + 1); 5254 ctlv->head.type = IPFW_TLV_TBLNAME_LIST; 5255 ctlv->head.length = sizeof(ipfw_obj_ctlv) + tlen; 5256 ctlv->count = ts.count; 5257 ctlv->objsize = sizeof(ipfw_obj_ntlv); 5258 memcpy(ctlv + 1, ts.idx, tlen); 5259 object_sort_ctlv(ctlv); 5260 tstate = ctlv; 5261 /* Rule next */ 5262 ctlv = (ipfw_obj_ctlv *)((caddr_t)ctlv + ctlv->head.length); 5263 ctlv->head.type = IPFW_TLV_RULE_LIST; 5264 ctlv->head.length = sizeof(ipfw_obj_ctlv) + rlen; 5265 ctlv->count = 1; 5266 memcpy(ctlv + 1, rule, rbufsize); 5267 } else { 5268 /* Simply add header */ 5269 sz = rlen + default_off; 5270 memset(ctlv, 0, sizeof(*ctlv)); 5271 ctlv->head.type = IPFW_TLV_RULE_LIST; 5272 ctlv->head.length = sizeof(ipfw_obj_ctlv) + rlen; 5273 ctlv->count = 1; 5274 } 5275 5276 if (do_get3(IP_FW_XADD, op3, &sz) != 0) 5277 err(EX_UNAVAILABLE, "getsockopt(%s)", "IP_FW_XADD"); 5278 5279 if (!co.do_quiet) { 5280 struct format_opts sfo; 5281 struct buf_pr bp; 5282 memset(&sfo, 0, sizeof(sfo)); 5283 sfo.tstate = tstate; 5284 sfo.set_mask = (uint32_t)(-1); 5285 bp_alloc(&bp, 4096); 5286 show_static_rule(&co, &sfo, &bp, rule, NULL); 5287 printf("%s", bp.buf); 5288 bp_free(&bp); 5289 } 5290 5291 if (tbuf != NULL) 5292 free(tbuf); 5293 5294 if (ts.idx != NULL) 5295 free(ts.idx); 5296 } 5297 5298 /* 5299 * clear the counters or the log counters. 5300 * optname has the following values: 5301 * 0 (zero both counters and logging) 5302 * 1 (zero logging only) 5303 */ 5304 void 5305 ipfw_zero(int ac, char *av[], int optname) 5306 { 5307 ipfw_range_tlv rt; 5308 char const *errstr; 5309 char const *name = optname ? "RESETLOG" : "ZERO"; 5310 uint32_t arg; 5311 int failed = EX_OK; 5312 5313 optname = optname ? IP_FW_XRESETLOG : IP_FW_XZERO; 5314 av++; ac--; 5315 5316 if (ac == 0) { 5317 /* clear all entries */ 5318 memset(&rt, 0, sizeof(rt)); 5319 rt.flags = IPFW_RCFLAG_ALL; 5320 if (do_range_cmd(optname, &rt) < 0) 5321 err(EX_UNAVAILABLE, "setsockopt(IP_FW_X%s)", name); 5322 if (!co.do_quiet) 5323 printf("%s.\n", optname == IP_FW_XZERO ? 5324 "Accounting cleared":"Logging counts reset"); 5325 5326 return; 5327 } 5328 5329 while (ac) { 5330 /* Rule number */ 5331 if (isdigit(**av)) { 5332 arg = strtonum(*av, 0, 0xffff, &errstr); 5333 if (errstr) 5334 errx(EX_DATAERR, 5335 "invalid rule number %s\n", *av); 5336 memset(&rt, 0, sizeof(rt)); 5337 rt.start_rule = arg; 5338 rt.end_rule = arg; 5339 rt.flags |= IPFW_RCFLAG_RANGE; 5340 if (co.use_set != 0) { 5341 rt.set = co.use_set - 1; 5342 rt.flags |= IPFW_RCFLAG_SET; 5343 } 5344 if (do_range_cmd(optname, &rt) != 0) { 5345 warn("rule %u: setsockopt(IP_FW_X%s)", 5346 arg, name); 5347 failed = EX_UNAVAILABLE; 5348 } else if (rt.new_set == 0) { 5349 printf("Entry %d not found\n", arg); 5350 failed = EX_UNAVAILABLE; 5351 } else if (!co.do_quiet) 5352 printf("Entry %d %s.\n", arg, 5353 optname == IP_FW_XZERO ? 5354 "cleared" : "logging count reset"); 5355 } else { 5356 errx(EX_USAGE, "invalid rule number ``%s''", *av); 5357 } 5358 av++; ac--; 5359 } 5360 if (failed != EX_OK) 5361 exit(failed); 5362 } 5363 5364 void 5365 ipfw_flush(int force) 5366 { 5367 ipfw_range_tlv rt; 5368 5369 if (!force && !co.do_quiet) { /* need to ask user */ 5370 int c; 5371 5372 printf("Are you sure? [yn] "); 5373 fflush(stdout); 5374 do { 5375 c = toupper(getc(stdin)); 5376 while (c != '\n' && getc(stdin) != '\n') 5377 if (feof(stdin)) 5378 return; /* and do not flush */ 5379 } while (c != 'Y' && c != 'N'); 5380 printf("\n"); 5381 if (c == 'N') /* user said no */ 5382 return; 5383 } 5384 if (co.do_pipe) { 5385 dummynet_flush(); 5386 return; 5387 } 5388 /* `ipfw set N flush` - is the same that `ipfw delete set N` */ 5389 memset(&rt, 0, sizeof(rt)); 5390 if (co.use_set != 0) { 5391 rt.set = co.use_set - 1; 5392 rt.flags = IPFW_RCFLAG_SET; 5393 } else 5394 rt.flags = IPFW_RCFLAG_ALL; 5395 if (do_range_cmd(IP_FW_XDEL, &rt) != 0) 5396 err(EX_UNAVAILABLE, "setsockopt(IP_FW_XDEL)"); 5397 if (!co.do_quiet) 5398 printf("Flushed all %s.\n", co.do_pipe ? "pipes" : "rules"); 5399 } 5400 5401 static struct _s_x intcmds[] = { 5402 { "talist", TOK_TALIST }, 5403 { "iflist", TOK_IFLIST }, 5404 { "olist", TOK_OLIST }, 5405 { "vlist", TOK_VLIST }, 5406 { NULL, 0 } 5407 }; 5408 5409 static struct _s_x otypes[] = { 5410 { "EACTION", IPFW_TLV_EACTION }, 5411 { "DYNSTATE", IPFW_TLV_STATE_NAME }, 5412 { NULL, 0 } 5413 }; 5414 5415 static const char* 5416 lookup_eaction_name(ipfw_obj_ntlv *ntlv, int cnt, uint16_t type) 5417 { 5418 const char *name; 5419 int i; 5420 5421 name = NULL; 5422 for (i = 0; i < cnt; i++) { 5423 if (ntlv[i].head.type != IPFW_TLV_EACTION) 5424 continue; 5425 if (IPFW_TLV_EACTION_NAME(ntlv[i].idx) != type) 5426 continue; 5427 name = ntlv[i].name; 5428 break; 5429 } 5430 return (name); 5431 } 5432 5433 static void 5434 ipfw_list_objects(int ac, char *av[]) 5435 { 5436 ipfw_obj_lheader req, *olh; 5437 ipfw_obj_ntlv *ntlv; 5438 const char *name; 5439 size_t sz; 5440 int i; 5441 5442 memset(&req, 0, sizeof(req)); 5443 sz = sizeof(req); 5444 if (do_get3(IP_FW_DUMP_SRVOBJECTS, &req.opheader, &sz) != 0) 5445 if (errno != ENOMEM) 5446 return; 5447 5448 sz = req.size; 5449 if ((olh = calloc(1, sz)) == NULL) 5450 return; 5451 5452 olh->size = sz; 5453 if (do_get3(IP_FW_DUMP_SRVOBJECTS, &olh->opheader, &sz) != 0) { 5454 free(olh); 5455 return; 5456 } 5457 5458 if (olh->count > 0) 5459 printf("Objects list:\n"); 5460 else 5461 printf("There are no objects\n"); 5462 ntlv = (ipfw_obj_ntlv *)(olh + 1); 5463 for (i = 0; i < olh->count; i++) { 5464 name = match_value(otypes, ntlv->head.type); 5465 if (name == NULL) 5466 name = lookup_eaction_name( 5467 (ipfw_obj_ntlv *)(olh + 1), olh->count, 5468 ntlv->head.type); 5469 if (name == NULL) 5470 printf(" kidx: %4d\ttype: %10d\tname: %s\n", 5471 ntlv->idx, ntlv->head.type, ntlv->name); 5472 else 5473 printf(" kidx: %4d\ttype: %10s\tname: %s\n", 5474 ntlv->idx, name, ntlv->name); 5475 ntlv++; 5476 } 5477 free(olh); 5478 } 5479 5480 void 5481 ipfw_internal_handler(int ac, char *av[]) 5482 { 5483 int tcmd; 5484 5485 ac--; av++; 5486 NEED1("internal cmd required"); 5487 5488 if ((tcmd = match_token(intcmds, *av)) == -1) 5489 errx(EX_USAGE, "invalid internal sub-cmd: %s", *av); 5490 5491 switch (tcmd) { 5492 case TOK_IFLIST: 5493 ipfw_list_tifaces(); 5494 break; 5495 case TOK_TALIST: 5496 ipfw_list_ta(ac, av); 5497 break; 5498 case TOK_OLIST: 5499 ipfw_list_objects(ac, av); 5500 break; 5501 case TOK_VLIST: 5502 ipfw_list_values(ac, av); 5503 break; 5504 } 5505 } 5506 5507 static int 5508 ipfw_get_tracked_ifaces(ipfw_obj_lheader **polh) 5509 { 5510 ipfw_obj_lheader req, *olh; 5511 size_t sz; 5512 5513 memset(&req, 0, sizeof(req)); 5514 sz = sizeof(req); 5515 5516 if (do_get3(IP_FW_XIFLIST, &req.opheader, &sz) != 0) { 5517 if (errno != ENOMEM) 5518 return (errno); 5519 } 5520 5521 sz = req.size; 5522 if ((olh = calloc(1, sz)) == NULL) 5523 return (ENOMEM); 5524 5525 olh->size = sz; 5526 if (do_get3(IP_FW_XIFLIST, &olh->opheader, &sz) != 0) { 5527 free(olh); 5528 return (errno); 5529 } 5530 5531 *polh = olh; 5532 return (0); 5533 } 5534 5535 static int 5536 ifinfo_cmp(const void *a, const void *b) 5537 { 5538 ipfw_iface_info *ia, *ib; 5539 5540 ia = (ipfw_iface_info *)a; 5541 ib = (ipfw_iface_info *)b; 5542 5543 return (stringnum_cmp(ia->ifname, ib->ifname)); 5544 } 5545 5546 /* 5547 * Retrieves table list from kernel, 5548 * optionally sorts it and calls requested function for each table. 5549 * Returns 0 on success. 5550 */ 5551 static void 5552 ipfw_list_tifaces() 5553 { 5554 ipfw_obj_lheader *olh; 5555 ipfw_iface_info *info; 5556 int i, error; 5557 5558 if ((error = ipfw_get_tracked_ifaces(&olh)) != 0) 5559 err(EX_OSERR, "Unable to request ipfw tracked interface list"); 5560 5561 5562 qsort(olh + 1, olh->count, olh->objsize, ifinfo_cmp); 5563 5564 info = (ipfw_iface_info *)(olh + 1); 5565 for (i = 0; i < olh->count; i++) { 5566 if (info->flags & IPFW_IFFLAG_RESOLVED) 5567 printf("%s ifindex: %d refcount: %u changes: %u\n", 5568 info->ifname, info->ifindex, info->refcnt, 5569 info->gencnt); 5570 else 5571 printf("%s ifindex: unresolved refcount: %u changes: %u\n", 5572 info->ifname, info->refcnt, info->gencnt); 5573 info = (ipfw_iface_info *)((caddr_t)info + olh->objsize); 5574 } 5575 5576 free(olh); 5577 } 5578 5579 5580 5581 5582