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 == '\\' || 944 *s1 == '_' || *s1 == '.') ; s1++) 945 if (*s1 == '\\' && s1[1] != '\0') 946 s1++; 947 948 buf = safe_calloc(s1 - s + 1, 1); 949 950 /* 951 * copy into a buffer skipping backslashes 952 */ 953 for (p = s, i = 0; p != s1 ; p++) 954 if (*p != '\\') 955 buf[i++] = *p; 956 buf[i++] = '\0'; 957 958 if (proto == IPPROTO_ETHERTYPE) { 959 i = match_token(ether_types, buf); 960 free(buf); 961 if (i != -1) { /* found */ 962 *end = s1; 963 return i; 964 } 965 } else { 966 struct protoent *pe = NULL; 967 struct servent *se; 968 969 if (proto != 0) 970 pe = getprotobynumber(proto); 971 setservent(1); 972 se = getservbyname(buf, pe ? pe->p_name : NULL); 973 free(buf); 974 if (se != NULL) { 975 *end = s1; 976 return ntohs(se->s_port); 977 } 978 } 979 return 0; /* not found */ 980 } 981 982 /* 983 * Fill the body of the command with the list of port ranges. 984 */ 985 static int 986 fill_newports(ipfw_insn_u16 *cmd, char *av, int proto, int cblen) 987 { 988 uint16_t a, b, *p = cmd->ports; 989 int i = 0; 990 char *s = av; 991 992 while (*s) { 993 a = strtoport(av, &s, 0, proto); 994 if (s == av) /* empty or invalid argument */ 995 return (0); 996 997 CHECK_LENGTH(cblen, i + 2); 998 999 switch (*s) { 1000 case '-': /* a range */ 1001 av = s + 1; 1002 b = strtoport(av, &s, 0, proto); 1003 /* Reject expressions like '1-abc' or '1-2-3'. */ 1004 if (s == av || (*s != ',' && *s != '\0')) 1005 return (0); 1006 p[0] = a; 1007 p[1] = b; 1008 break; 1009 case ',': /* comma separated list */ 1010 case '\0': 1011 p[0] = p[1] = a; 1012 break; 1013 default: 1014 warnx("port list: invalid separator <%c> in <%s>", 1015 *s, av); 1016 return (0); 1017 } 1018 1019 i++; 1020 p += 2; 1021 av = s + 1; 1022 } 1023 if (i > 0) { 1024 if (i + 1 > F_LEN_MASK) 1025 errx(EX_DATAERR, "too many ports/ranges\n"); 1026 cmd->o.len |= i + 1; /* leave F_NOT and F_OR untouched */ 1027 } 1028 return (i); 1029 } 1030 1031 /* 1032 * Fill the body of the command with the list of DiffServ codepoints. 1033 */ 1034 static void 1035 fill_dscp(ipfw_insn *cmd, char *av, int cblen) 1036 { 1037 uint32_t *low, *high; 1038 char *s = av, *a; 1039 int code; 1040 1041 cmd->opcode = O_DSCP; 1042 cmd->len |= F_INSN_SIZE(ipfw_insn_u32) + 1; 1043 1044 CHECK_CMDLEN; 1045 1046 low = (uint32_t *)(cmd + 1); 1047 high = low + 1; 1048 1049 *low = 0; 1050 *high = 0; 1051 1052 while (s != NULL) { 1053 a = strchr(s, ','); 1054 1055 if (a != NULL) 1056 *a++ = '\0'; 1057 1058 if (isalpha(*s)) { 1059 if ((code = match_token(f_ipdscp, s)) == -1) 1060 errx(EX_DATAERR, "Unknown DSCP code"); 1061 } else { 1062 code = strtoul(s, NULL, 10); 1063 if (code < 0 || code > 63) 1064 errx(EX_DATAERR, "Invalid DSCP value"); 1065 } 1066 1067 if (code >= 32) 1068 *high |= 1 << (code - 32); 1069 else 1070 *low |= 1 << code; 1071 1072 s = a; 1073 } 1074 } 1075 1076 static struct _s_x icmpcodes[] = { 1077 { "net", ICMP_UNREACH_NET }, 1078 { "host", ICMP_UNREACH_HOST }, 1079 { "protocol", ICMP_UNREACH_PROTOCOL }, 1080 { "port", ICMP_UNREACH_PORT }, 1081 { "needfrag", ICMP_UNREACH_NEEDFRAG }, 1082 { "srcfail", ICMP_UNREACH_SRCFAIL }, 1083 { "net-unknown", ICMP_UNREACH_NET_UNKNOWN }, 1084 { "host-unknown", ICMP_UNREACH_HOST_UNKNOWN }, 1085 { "isolated", ICMP_UNREACH_ISOLATED }, 1086 { "net-prohib", ICMP_UNREACH_NET_PROHIB }, 1087 { "host-prohib", ICMP_UNREACH_HOST_PROHIB }, 1088 { "tosnet", ICMP_UNREACH_TOSNET }, 1089 { "toshost", ICMP_UNREACH_TOSHOST }, 1090 { "filter-prohib", ICMP_UNREACH_FILTER_PROHIB }, 1091 { "host-precedence", ICMP_UNREACH_HOST_PRECEDENCE }, 1092 { "precedence-cutoff", ICMP_UNREACH_PRECEDENCE_CUTOFF }, 1093 { NULL, 0 } 1094 }; 1095 1096 static void 1097 fill_reject_code(u_short *codep, char *str) 1098 { 1099 int val; 1100 char *s; 1101 1102 val = strtoul(str, &s, 0); 1103 if (s == str || *s != '\0' || val >= 0x100) 1104 val = match_token(icmpcodes, str); 1105 if (val < 0) 1106 errx(EX_DATAERR, "unknown ICMP unreachable code ``%s''", str); 1107 *codep = val; 1108 return; 1109 } 1110 1111 static void 1112 print_reject_code(struct buf_pr *bp, uint16_t code) 1113 { 1114 char const *s; 1115 1116 if ((s = match_value(icmpcodes, code)) != NULL) 1117 bprintf(bp, "unreach %s", s); 1118 else 1119 bprintf(bp, "unreach %u", code); 1120 } 1121 1122 /* 1123 * Returns the number of bits set (from left) in a contiguous bitmask, 1124 * or -1 if the mask is not contiguous. 1125 * XXX this needs a proper fix. 1126 * This effectively works on masks in big-endian (network) format. 1127 * when compiled on little endian architectures. 1128 * 1129 * First bit is bit 7 of the first byte -- note, for MAC addresses, 1130 * the first bit on the wire is bit 0 of the first byte. 1131 * len is the max length in bits. 1132 */ 1133 int 1134 contigmask(uint8_t *p, int len) 1135 { 1136 int i, n; 1137 1138 for (i=0; i<len ; i++) 1139 if ( (p[i/8] & (1 << (7 - (i%8)))) == 0) /* first bit unset */ 1140 break; 1141 for (n=i+1; n < len; n++) 1142 if ( (p[n/8] & (1 << (7 - (n%8)))) != 0) 1143 return -1; /* mask not contiguous */ 1144 return i; 1145 } 1146 1147 /* 1148 * print flags set/clear in the two bitmasks passed as parameters. 1149 * There is a specialized check for f_tcpflags. 1150 */ 1151 static void 1152 print_flags(struct buf_pr *bp, char const *name, ipfw_insn *cmd, 1153 struct _s_x *list) 1154 { 1155 char const *comma = ""; 1156 int i; 1157 uint8_t set = cmd->arg1 & 0xff; 1158 uint8_t clear = (cmd->arg1 >> 8) & 0xff; 1159 1160 if (list == f_tcpflags && set == TH_SYN && clear == TH_ACK) { 1161 bprintf(bp, " setup"); 1162 return; 1163 } 1164 1165 bprintf(bp, " %s ", name); 1166 for (i=0; list[i].x != 0; i++) { 1167 if (set & list[i].x) { 1168 set &= ~list[i].x; 1169 bprintf(bp, "%s%s", comma, list[i].s); 1170 comma = ","; 1171 } 1172 if (clear & list[i].x) { 1173 clear &= ~list[i].x; 1174 bprintf(bp, "%s!%s", comma, list[i].s); 1175 comma = ","; 1176 } 1177 } 1178 } 1179 1180 1181 /* 1182 * Print the ip address contained in a command. 1183 */ 1184 static void 1185 print_ip(struct buf_pr *bp, const struct format_opts *fo, ipfw_insn_ip *cmd) 1186 { 1187 struct hostent *he = NULL; 1188 struct in_addr *ia; 1189 uint32_t len = F_LEN((ipfw_insn *)cmd); 1190 uint32_t *a = ((ipfw_insn_u32 *)cmd)->d; 1191 char *t; 1192 1193 bprintf(bp, " "); 1194 if (cmd->o.opcode == O_IP_DST_LOOKUP && len > F_INSN_SIZE(ipfw_insn_u32)) { 1195 uint32_t d = a[1]; 1196 const char *arg = "<invalid>"; 1197 1198 if (d < sizeof(lookup_key)/sizeof(lookup_key[0])) 1199 arg = match_value(rule_options, lookup_key[d]); 1200 t = table_search_ctlv(fo->tstate, ((ipfw_insn *)cmd)->arg1); 1201 bprintf(bp, "lookup %s %s", arg, t); 1202 return; 1203 } 1204 if (cmd->o.opcode == O_IP_SRC_ME || cmd->o.opcode == O_IP_DST_ME) { 1205 bprintf(bp, "me"); 1206 return; 1207 } 1208 if (cmd->o.opcode == O_IP_SRC_LOOKUP || 1209 cmd->o.opcode == O_IP_DST_LOOKUP) { 1210 t = table_search_ctlv(fo->tstate, ((ipfw_insn *)cmd)->arg1); 1211 bprintf(bp, "table(%s", t); 1212 if (len == F_INSN_SIZE(ipfw_insn_u32)) 1213 bprintf(bp, ",%u", *a); 1214 bprintf(bp, ")"); 1215 return; 1216 } 1217 if (cmd->o.opcode == O_IP_SRC_SET || cmd->o.opcode == O_IP_DST_SET) { 1218 uint32_t x, *map = (uint32_t *)&(cmd->mask); 1219 int i, j; 1220 char comma = '{'; 1221 1222 x = cmd->o.arg1 - 1; 1223 x = htonl( ~x ); 1224 cmd->addr.s_addr = htonl(cmd->addr.s_addr); 1225 bprintf(bp, "%s/%d", inet_ntoa(cmd->addr), 1226 contigmask((uint8_t *)&x, 32)); 1227 x = cmd->addr.s_addr = htonl(cmd->addr.s_addr); 1228 x &= 0xff; /* base */ 1229 /* 1230 * Print bits and ranges. 1231 * Locate first bit set (i), then locate first bit unset (j). 1232 * If we have 3+ consecutive bits set, then print them as a 1233 * range, otherwise only print the initial bit and rescan. 1234 */ 1235 for (i=0; i < cmd->o.arg1; i++) 1236 if (map[i/32] & (1<<(i & 31))) { 1237 for (j=i+1; j < cmd->o.arg1; j++) 1238 if (!(map[ j/32] & (1<<(j & 31)))) 1239 break; 1240 bprintf(bp, "%c%d", comma, i+x); 1241 if (j>i+2) { /* range has at least 3 elements */ 1242 bprintf(bp, "-%d", j-1+x); 1243 i = j-1; 1244 } 1245 comma = ','; 1246 } 1247 bprintf(bp, "}"); 1248 return; 1249 } 1250 /* 1251 * len == 2 indicates a single IP, whereas lists of 1 or more 1252 * addr/mask pairs have len = (2n+1). We convert len to n so we 1253 * use that to count the number of entries. 1254 */ 1255 for (len = len / 2; len > 0; len--, a += 2) { 1256 int mb = /* mask length */ 1257 (cmd->o.opcode == O_IP_SRC || cmd->o.opcode == O_IP_DST) ? 1258 32 : contigmask((uint8_t *)&(a[1]), 32); 1259 if (mb == 32 && co.do_resolv) 1260 he = gethostbyaddr((char *)&(a[0]), sizeof(in_addr_t), 1261 AF_INET); 1262 if (he != NULL) /* resolved to name */ 1263 bprintf(bp, "%s", he->h_name); 1264 else if (mb == 0) /* any */ 1265 bprintf(bp, "any"); 1266 else { /* numeric IP followed by some kind of mask */ 1267 ia = (struct in_addr *)&a[0]; 1268 bprintf(bp, "%s", inet_ntoa(*ia)); 1269 if (mb < 0) { 1270 ia = (struct in_addr *)&a[1]; 1271 bprintf(bp, ":%s", inet_ntoa(*ia)); 1272 } else if (mb < 32) 1273 bprintf(bp, "/%d", mb); 1274 } 1275 if (len > 1) 1276 bprintf(bp, ","); 1277 } 1278 } 1279 1280 /* 1281 * prints a MAC address/mask pair 1282 */ 1283 static void 1284 format_mac(struct buf_pr *bp, uint8_t *addr, uint8_t *mask) 1285 { 1286 int l = contigmask(mask, 48); 1287 1288 if (l == 0) 1289 bprintf(bp, " any"); 1290 else { 1291 bprintf(bp, " %02x:%02x:%02x:%02x:%02x:%02x", 1292 addr[0], addr[1], addr[2], addr[3], addr[4], addr[5]); 1293 if (l == -1) 1294 bprintf(bp, "&%02x:%02x:%02x:%02x:%02x:%02x", 1295 mask[0], mask[1], mask[2], 1296 mask[3], mask[4], mask[5]); 1297 else if (l < 48) 1298 bprintf(bp, "/%d", l); 1299 } 1300 } 1301 1302 static void 1303 print_mac(struct buf_pr *bp, ipfw_insn_mac *mac) 1304 { 1305 1306 bprintf(bp, " MAC"); 1307 format_mac(bp, mac->addr, mac->mask); 1308 format_mac(bp, mac->addr + 6, mac->mask + 6); 1309 } 1310 1311 static void 1312 fill_icmptypes(ipfw_insn_u32 *cmd, char *av) 1313 { 1314 uint8_t type; 1315 1316 cmd->d[0] = 0; 1317 while (*av) { 1318 if (*av == ',') 1319 av++; 1320 1321 type = strtoul(av, &av, 0); 1322 1323 if (*av != ',' && *av != '\0') 1324 errx(EX_DATAERR, "invalid ICMP type"); 1325 1326 if (type > 31) 1327 errx(EX_DATAERR, "ICMP type out of range"); 1328 1329 cmd->d[0] |= 1 << type; 1330 } 1331 cmd->o.opcode = O_ICMPTYPE; 1332 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32); 1333 } 1334 1335 static void 1336 print_icmptypes(struct buf_pr *bp, ipfw_insn_u32 *cmd) 1337 { 1338 int i; 1339 char sep= ' '; 1340 1341 bprintf(bp, " icmptypes"); 1342 for (i = 0; i < 32; i++) { 1343 if ( (cmd->d[0] & (1 << (i))) == 0) 1344 continue; 1345 bprintf(bp, "%c%d", sep, i); 1346 sep = ','; 1347 } 1348 } 1349 1350 static void 1351 print_dscp(struct buf_pr *bp, ipfw_insn_u32 *cmd) 1352 { 1353 int i = 0; 1354 uint32_t *v; 1355 char sep= ' '; 1356 const char *code; 1357 1358 bprintf(bp, " dscp"); 1359 v = cmd->d; 1360 while (i < 64) { 1361 if (*v & (1 << i)) { 1362 if ((code = match_value(f_ipdscp, i)) != NULL) 1363 bprintf(bp, "%c%s", sep, code); 1364 else 1365 bprintf(bp, "%c%d", sep, i); 1366 sep = ','; 1367 } 1368 1369 if ((++i % 32) == 0) 1370 v++; 1371 } 1372 } 1373 1374 #define insntod(cmd, type) ((ipfw_insn_ ## type *)(cmd)) 1375 struct show_state { 1376 struct ip_fw_rule *rule; 1377 const ipfw_insn *eaction; 1378 uint8_t *printed; 1379 int flags; 1380 #define HAVE_PROTO 0x0001 1381 #define HAVE_SRCIP 0x0002 1382 #define HAVE_DSTIP 0x0004 1383 #define HAVE_PROBE_STATE 0x0008 1384 int proto; 1385 int or_block; 1386 }; 1387 1388 static int 1389 init_show_state(struct show_state *state, struct ip_fw_rule *rule) 1390 { 1391 1392 state->printed = calloc(rule->cmd_len, sizeof(uint8_t)); 1393 if (state->printed == NULL) 1394 return (ENOMEM); 1395 state->rule = rule; 1396 state->eaction = NULL; 1397 state->flags = 0; 1398 state->proto = 0; 1399 state->or_block = 0; 1400 return (0); 1401 } 1402 1403 static void 1404 free_show_state(struct show_state *state) 1405 { 1406 1407 free(state->printed); 1408 } 1409 1410 static uint8_t 1411 is_printed_opcode(struct show_state *state, const ipfw_insn *cmd) 1412 { 1413 1414 return (state->printed[cmd - state->rule->cmd]); 1415 } 1416 1417 static void 1418 mark_printed(struct show_state *state, const ipfw_insn *cmd) 1419 { 1420 1421 state->printed[cmd - state->rule->cmd] = 1; 1422 } 1423 1424 static void 1425 print_limit_mask(struct buf_pr *bp, const ipfw_insn_limit *limit) 1426 { 1427 struct _s_x *p = limit_masks; 1428 char const *comma = " "; 1429 uint8_t x; 1430 1431 for (x = limit->limit_mask; p->x != 0; p++) { 1432 if ((x & p->x) == p->x) { 1433 x &= ~p->x; 1434 bprintf(bp, "%s%s", comma, p->s); 1435 comma = ","; 1436 } 1437 } 1438 bprint_uint_arg(bp, " ", limit->conn_limit); 1439 } 1440 1441 static int 1442 print_instruction(struct buf_pr *bp, const struct format_opts *fo, 1443 struct show_state *state, ipfw_insn *cmd) 1444 { 1445 struct protoent *pe; 1446 struct passwd *pwd; 1447 struct group *grp; 1448 const char *s; 1449 double d; 1450 1451 if (is_printed_opcode(state, cmd)) 1452 return (0); 1453 if ((cmd->len & F_OR) != 0 && state->or_block == 0) 1454 bprintf(bp, " {"); 1455 if (cmd->opcode != O_IN && (cmd->len & F_NOT) != 0) 1456 bprintf(bp, " not"); 1457 1458 switch (cmd->opcode) { 1459 case O_PROB: 1460 d = 1.0 * insntod(cmd, u32)->d[0] / 0x7fffffff; 1461 bprintf(bp, "prob %f ", d); 1462 break; 1463 case O_PROBE_STATE: /* no need to print anything here */ 1464 state->flags |= HAVE_PROBE_STATE; 1465 break; 1466 case O_IP_SRC: 1467 case O_IP_SRC_LOOKUP: 1468 case O_IP_SRC_MASK: 1469 case O_IP_SRC_ME: 1470 case O_IP_SRC_SET: 1471 if (state->flags & HAVE_SRCIP) 1472 bprintf(bp, " src-ip"); 1473 print_ip(bp, fo, insntod(cmd, ip)); 1474 break; 1475 case O_IP_DST: 1476 case O_IP_DST_LOOKUP: 1477 case O_IP_DST_MASK: 1478 case O_IP_DST_ME: 1479 case O_IP_DST_SET: 1480 if (state->flags & HAVE_DSTIP) 1481 bprintf(bp, " dst-ip"); 1482 print_ip(bp, fo, insntod(cmd, ip)); 1483 break; 1484 case O_IP6_SRC: 1485 case O_IP6_SRC_MASK: 1486 case O_IP6_SRC_ME: 1487 if (state->flags & HAVE_SRCIP) 1488 bprintf(bp, " src-ip6"); 1489 print_ip6(bp, insntod(cmd, ip6)); 1490 break; 1491 case O_IP6_DST: 1492 case O_IP6_DST_MASK: 1493 case O_IP6_DST_ME: 1494 if (state->flags & HAVE_DSTIP) 1495 bprintf(bp, " dst-ip6"); 1496 print_ip6(bp, insntod(cmd, ip6)); 1497 break; 1498 case O_FLOW6ID: 1499 print_flow6id(bp, insntod(cmd, u32)); 1500 break; 1501 case O_IP_DSTPORT: 1502 case O_IP_SRCPORT: 1503 print_newports(bp, insntod(cmd, u16), state->proto, 1504 (state->flags & (HAVE_SRCIP | HAVE_DSTIP)) == 1505 (HAVE_SRCIP | HAVE_DSTIP) ? cmd->opcode: 0); 1506 break; 1507 case O_PROTO: 1508 pe = getprotobynumber(cmd->arg1); 1509 if (state->flags & HAVE_PROTO) 1510 bprintf(bp, " proto"); 1511 if (pe != NULL) 1512 bprintf(bp, " %s", pe->p_name); 1513 else 1514 bprintf(bp, " %u", cmd->arg1); 1515 state->proto = cmd->arg1; 1516 break; 1517 case O_MACADDR2: 1518 print_mac(bp, insntod(cmd, mac)); 1519 break; 1520 case O_MAC_TYPE: 1521 print_newports(bp, insntod(cmd, u16), 1522 IPPROTO_ETHERTYPE, cmd->opcode); 1523 break; 1524 case O_FRAG: 1525 bprintf(bp, " frag"); 1526 break; 1527 case O_FIB: 1528 bprintf(bp, " fib %u", cmd->arg1); 1529 break; 1530 case O_SOCKARG: 1531 bprintf(bp, " sockarg"); 1532 break; 1533 case O_IN: 1534 bprintf(bp, cmd->len & F_NOT ? " out" : " in"); 1535 break; 1536 case O_DIVERTED: 1537 switch (cmd->arg1) { 1538 case 3: 1539 bprintf(bp, " diverted"); 1540 break; 1541 case 2: 1542 bprintf(bp, " diverted-output"); 1543 break; 1544 case 1: 1545 bprintf(bp, " diverted-loopback"); 1546 break; 1547 default: 1548 bprintf(bp, " diverted-?<%u>", cmd->arg1); 1549 break; 1550 } 1551 break; 1552 case O_LAYER2: 1553 bprintf(bp, " layer2"); 1554 break; 1555 case O_XMIT: 1556 case O_RECV: 1557 case O_VIA: 1558 if (cmd->opcode == O_XMIT) 1559 s = "xmit"; 1560 else if (cmd->opcode == O_RECV) 1561 s = "recv"; 1562 else /* if (cmd->opcode == O_VIA) */ 1563 s = "via"; 1564 switch (insntod(cmd, if)->name[0]) { 1565 case '\0': 1566 bprintf(bp, " %s %s", s, 1567 inet_ntoa(insntod(cmd, if)->p.ip)); 1568 break; 1569 case '\1': 1570 bprintf(bp, " %s table(%s)", s, 1571 table_search_ctlv(fo->tstate, 1572 insntod(cmd, if)->p.kidx)); 1573 break; 1574 default: 1575 bprintf(bp, " %s %s", s, 1576 insntod(cmd, if)->name); 1577 } 1578 break; 1579 case O_IP_FLOW_LOOKUP: 1580 s = table_search_ctlv(fo->tstate, cmd->arg1); 1581 bprintf(bp, " flow table(%s", s); 1582 if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_u32)) 1583 bprintf(bp, ",%u", insntod(cmd, u32)->d[0]); 1584 bprintf(bp, ")"); 1585 break; 1586 case O_IPID: 1587 case O_IPTTL: 1588 case O_IPLEN: 1589 case O_TCPDATALEN: 1590 case O_TCPWIN: 1591 if (F_LEN(cmd) == 1) { 1592 switch (cmd->opcode) { 1593 case O_IPID: 1594 s = "ipid"; 1595 break; 1596 case O_IPTTL: 1597 s = "ipttl"; 1598 break; 1599 case O_IPLEN: 1600 s = "iplen"; 1601 break; 1602 case O_TCPDATALEN: 1603 s = "tcpdatalen"; 1604 break; 1605 case O_TCPWIN: 1606 s = "tcpwin"; 1607 break; 1608 } 1609 bprintf(bp, " %s %u", s, cmd->arg1); 1610 } else 1611 print_newports(bp, insntod(cmd, u16), 0, 1612 cmd->opcode); 1613 break; 1614 case O_IPVER: 1615 bprintf(bp, " ipver %u", cmd->arg1); 1616 break; 1617 case O_IPPRECEDENCE: 1618 bprintf(bp, " ipprecedence %u", cmd->arg1 >> 5); 1619 break; 1620 case O_DSCP: 1621 print_dscp(bp, insntod(cmd, u32)); 1622 break; 1623 case O_IPOPT: 1624 print_flags(bp, "ipoptions", cmd, f_ipopts); 1625 break; 1626 case O_IPTOS: 1627 print_flags(bp, "iptos", cmd, f_iptos); 1628 break; 1629 case O_ICMPTYPE: 1630 print_icmptypes(bp, insntod(cmd, u32)); 1631 break; 1632 case O_ESTAB: 1633 bprintf(bp, " established"); 1634 break; 1635 case O_TCPFLAGS: 1636 print_flags(bp, "tcpflags", cmd, f_tcpflags); 1637 break; 1638 case O_TCPOPTS: 1639 print_flags(bp, "tcpoptions", cmd, f_tcpopts); 1640 break; 1641 case O_TCPACK: 1642 bprintf(bp, " tcpack %d", 1643 ntohl(insntod(cmd, u32)->d[0])); 1644 break; 1645 case O_TCPSEQ: 1646 bprintf(bp, " tcpseq %d", 1647 ntohl(insntod(cmd, u32)->d[0])); 1648 break; 1649 case O_UID: 1650 pwd = getpwuid(insntod(cmd, u32)->d[0]); 1651 if (pwd != NULL) 1652 bprintf(bp, " uid %s", pwd->pw_name); 1653 else 1654 bprintf(bp, " uid %u", 1655 insntod(cmd, u32)->d[0]); 1656 break; 1657 case O_GID: 1658 grp = getgrgid(insntod(cmd, u32)->d[0]); 1659 if (grp != NULL) 1660 bprintf(bp, " gid %s", grp->gr_name); 1661 else 1662 bprintf(bp, " gid %u", 1663 insntod(cmd, u32)->d[0]); 1664 break; 1665 case O_JAIL: 1666 bprintf(bp, " jail %d", insntod(cmd, u32)->d[0]); 1667 break; 1668 case O_VERREVPATH: 1669 bprintf(bp, " verrevpath"); 1670 break; 1671 case O_VERSRCREACH: 1672 bprintf(bp, " versrcreach"); 1673 break; 1674 case O_ANTISPOOF: 1675 bprintf(bp, " antispoof"); 1676 break; 1677 case O_IPSEC: 1678 bprintf(bp, " ipsec"); 1679 break; 1680 case O_NOP: 1681 bprintf(bp, " // %s", (char *)(cmd + 1)); 1682 break; 1683 case O_KEEP_STATE: 1684 if (state->flags & HAVE_PROBE_STATE) 1685 bprintf(bp, " keep-state"); 1686 else 1687 bprintf(bp, " record-state"); 1688 bprintf(bp, " :%s", 1689 object_search_ctlv(fo->tstate, cmd->arg1, 1690 IPFW_TLV_STATE_NAME)); 1691 break; 1692 case O_LIMIT: 1693 if (state->flags & HAVE_PROBE_STATE) 1694 bprintf(bp, " limit"); 1695 else 1696 bprintf(bp, " set-limit"); 1697 print_limit_mask(bp, insntod(cmd, limit)); 1698 bprintf(bp, " :%s", 1699 object_search_ctlv(fo->tstate, cmd->arg1, 1700 IPFW_TLV_STATE_NAME)); 1701 break; 1702 case O_IP6: 1703 bprintf(bp, " ip6"); 1704 break; 1705 case O_IP4: 1706 bprintf(bp, " ip4"); 1707 break; 1708 case O_ICMP6TYPE: 1709 print_icmp6types(bp, insntod(cmd, u32)); 1710 break; 1711 case O_EXT_HDR: 1712 print_ext6hdr(bp, cmd); 1713 break; 1714 case O_TAGGED: 1715 if (F_LEN(cmd) == 1) 1716 bprint_uint_arg(bp, " tagged ", cmd->arg1); 1717 else 1718 print_newports(bp, insntod(cmd, u16), 1719 0, O_TAGGED); 1720 break; 1721 case O_SKIP_ACTION: 1722 bprintf(bp, " defer-immediate-action"); 1723 break; 1724 default: 1725 bprintf(bp, " [opcode %d len %d]", cmd->opcode, 1726 cmd->len); 1727 } 1728 if (cmd->len & F_OR) { 1729 bprintf(bp, " or"); 1730 state->or_block = 1; 1731 } else if (state->or_block != 0) { 1732 bprintf(bp, " }"); 1733 state->or_block = 0; 1734 } 1735 mark_printed(state, cmd); 1736 1737 return (1); 1738 } 1739 1740 static ipfw_insn * 1741 print_opcode(struct buf_pr *bp, struct format_opts *fo, 1742 struct show_state *state, int opcode) 1743 { 1744 ipfw_insn *cmd; 1745 int l; 1746 1747 for (l = state->rule->act_ofs, cmd = state->rule->cmd; 1748 l > 0; l -= F_LEN(cmd), cmd += F_LEN(cmd)) { 1749 /* We use zero opcode to print the rest of options */ 1750 if (opcode >= 0 && cmd->opcode != opcode) 1751 continue; 1752 /* 1753 * Skip O_NOP, when we printing the rest 1754 * of options, it will be handled separately. 1755 */ 1756 if (cmd->opcode == O_NOP && opcode != O_NOP) 1757 continue; 1758 if (!print_instruction(bp, fo, state, cmd)) 1759 continue; 1760 return (cmd); 1761 } 1762 return (NULL); 1763 } 1764 1765 static void 1766 print_fwd(struct buf_pr *bp, const ipfw_insn *cmd) 1767 { 1768 char buf[INET6_ADDRSTRLEN + IF_NAMESIZE + 2]; 1769 ipfw_insn_sa6 *sa6; 1770 ipfw_insn_sa *sa; 1771 uint16_t port; 1772 1773 if (cmd->opcode == O_FORWARD_IP) { 1774 sa = insntod(cmd, sa); 1775 port = sa->sa.sin_port; 1776 if (sa->sa.sin_addr.s_addr == INADDR_ANY) 1777 bprintf(bp, "fwd tablearg"); 1778 else 1779 bprintf(bp, "fwd %s", inet_ntoa(sa->sa.sin_addr)); 1780 } else { 1781 sa6 = insntod(cmd, sa6); 1782 port = sa6->sa.sin6_port; 1783 bprintf(bp, "fwd "); 1784 if (getnameinfo((const struct sockaddr *)&sa6->sa, 1785 sizeof(struct sockaddr_in6), buf, sizeof(buf), NULL, 0, 1786 NI_NUMERICHOST) == 0) 1787 bprintf(bp, "%s", buf); 1788 } 1789 if (port != 0) 1790 bprintf(bp, ",%u", port); 1791 } 1792 1793 static int 1794 print_action_instruction(struct buf_pr *bp, const struct format_opts *fo, 1795 struct show_state *state, const ipfw_insn *cmd) 1796 { 1797 const char *s; 1798 1799 if (is_printed_opcode(state, cmd)) 1800 return (0); 1801 switch (cmd->opcode) { 1802 case O_CHECK_STATE: 1803 bprintf(bp, "check-state"); 1804 if (cmd->arg1 != 0) 1805 s = object_search_ctlv(fo->tstate, cmd->arg1, 1806 IPFW_TLV_STATE_NAME); 1807 else 1808 s = NULL; 1809 bprintf(bp, " :%s", s ? s: "any"); 1810 break; 1811 case O_ACCEPT: 1812 bprintf(bp, "allow"); 1813 break; 1814 case O_COUNT: 1815 bprintf(bp, "count"); 1816 break; 1817 case O_DENY: 1818 bprintf(bp, "deny"); 1819 break; 1820 case O_REJECT: 1821 if (cmd->arg1 == ICMP_REJECT_RST) 1822 bprintf(bp, "reset"); 1823 else if (cmd->arg1 == ICMP_REJECT_ABORT) 1824 bprintf(bp, "abort"); 1825 else if (cmd->arg1 == ICMP_UNREACH_HOST) 1826 bprintf(bp, "reject"); 1827 else 1828 print_reject_code(bp, cmd->arg1); 1829 break; 1830 case O_UNREACH6: 1831 if (cmd->arg1 == ICMP6_UNREACH_RST) 1832 bprintf(bp, "reset6"); 1833 else if (cmd->arg1 == ICMP6_UNREACH_ABORT) 1834 bprintf(bp, "abort6"); 1835 else 1836 print_unreach6_code(bp, cmd->arg1); 1837 break; 1838 case O_SKIPTO: 1839 bprint_uint_arg(bp, "skipto ", cmd->arg1); 1840 break; 1841 case O_PIPE: 1842 bprint_uint_arg(bp, "pipe ", cmd->arg1); 1843 break; 1844 case O_QUEUE: 1845 bprint_uint_arg(bp, "queue ", cmd->arg1); 1846 break; 1847 case O_DIVERT: 1848 bprint_uint_arg(bp, "divert ", cmd->arg1); 1849 break; 1850 case O_TEE: 1851 bprint_uint_arg(bp, "tee ", cmd->arg1); 1852 break; 1853 case O_NETGRAPH: 1854 bprint_uint_arg(bp, "netgraph ", cmd->arg1); 1855 break; 1856 case O_NGTEE: 1857 bprint_uint_arg(bp, "ngtee ", cmd->arg1); 1858 break; 1859 case O_FORWARD_IP: 1860 case O_FORWARD_IP6: 1861 print_fwd(bp, cmd); 1862 break; 1863 case O_LOG: 1864 if (insntod(cmd, log)->max_log > 0) 1865 bprintf(bp, " log logamount %d", 1866 insntod(cmd, log)->max_log); 1867 else 1868 bprintf(bp, " log"); 1869 break; 1870 case O_ALTQ: 1871 #ifndef NO_ALTQ 1872 print_altq_cmd(bp, insntod(cmd, altq)); 1873 #endif 1874 break; 1875 case O_TAG: 1876 bprint_uint_arg(bp, cmd->len & F_NOT ? " untag ": 1877 " tag ", cmd->arg1); 1878 break; 1879 case O_NAT: 1880 if (cmd->arg1 != IP_FW_NAT44_GLOBAL) 1881 bprint_uint_arg(bp, "nat ", cmd->arg1); 1882 else 1883 bprintf(bp, "nat global"); 1884 break; 1885 case O_SETFIB: 1886 if (cmd->arg1 == IP_FW_TARG) 1887 bprint_uint_arg(bp, "setfib ", cmd->arg1); 1888 else 1889 bprintf(bp, "setfib %u", cmd->arg1 & 0x7FFF); 1890 break; 1891 case O_EXTERNAL_ACTION: 1892 /* 1893 * The external action can consists of two following 1894 * each other opcodes - O_EXTERNAL_ACTION and 1895 * O_EXTERNAL_INSTANCE. The first contains the ID of 1896 * name of external action. The second contains the ID 1897 * of name of external action instance. 1898 * NOTE: in case when external action has no named 1899 * instances support, the second opcode isn't needed. 1900 */ 1901 state->eaction = cmd; 1902 s = object_search_ctlv(fo->tstate, cmd->arg1, 1903 IPFW_TLV_EACTION); 1904 if (match_token(rule_eactions, s) != -1) 1905 bprintf(bp, "%s", s); 1906 else 1907 bprintf(bp, "eaction %s", s); 1908 break; 1909 case O_EXTERNAL_INSTANCE: 1910 if (state->eaction == NULL) 1911 break; 1912 /* 1913 * XXX: we need to teach ipfw(9) to rewrite opcodes 1914 * in the user buffer on rule addition. When we add 1915 * the rule, we specify zero TLV type for 1916 * O_EXTERNAL_INSTANCE object. To show correct 1917 * rule after `ipfw add` we need to search instance 1918 * name with zero type. But when we do `ipfw show` 1919 * we calculate TLV type using IPFW_TLV_EACTION_NAME() 1920 * macro. 1921 */ 1922 s = object_search_ctlv(fo->tstate, cmd->arg1, 0); 1923 if (s == NULL) 1924 s = object_search_ctlv(fo->tstate, 1925 cmd->arg1, IPFW_TLV_EACTION_NAME( 1926 state->eaction->arg1)); 1927 bprintf(bp, " %s", s); 1928 break; 1929 case O_EXTERNAL_DATA: 1930 if (state->eaction == NULL) 1931 break; 1932 /* 1933 * Currently we support data formatting only for 1934 * external data with datalen u16. For unknown data 1935 * print its size in bytes. 1936 */ 1937 if (cmd->len == F_INSN_SIZE(ipfw_insn)) 1938 bprintf(bp, " %u", cmd->arg1); 1939 else 1940 bprintf(bp, " %ubytes", 1941 cmd->len * sizeof(uint32_t)); 1942 break; 1943 case O_SETDSCP: 1944 if (cmd->arg1 == IP_FW_TARG) { 1945 bprintf(bp, "setdscp tablearg"); 1946 break; 1947 } 1948 s = match_value(f_ipdscp, cmd->arg1 & 0x3F); 1949 if (s != NULL) 1950 bprintf(bp, "setdscp %s", s); 1951 else 1952 bprintf(bp, "setdscp %u", cmd->arg1 & 0x3F); 1953 break; 1954 case O_REASS: 1955 bprintf(bp, "reass"); 1956 break; 1957 case O_CALLRETURN: 1958 if (cmd->len & F_NOT) 1959 bprintf(bp, "return"); 1960 else 1961 bprint_uint_arg(bp, "call ", cmd->arg1); 1962 break; 1963 default: 1964 bprintf(bp, "** unrecognized action %d len %d ", 1965 cmd->opcode, cmd->len); 1966 } 1967 mark_printed(state, cmd); 1968 1969 return (1); 1970 } 1971 1972 1973 static ipfw_insn * 1974 print_action(struct buf_pr *bp, struct format_opts *fo, 1975 struct show_state *state, uint8_t opcode) 1976 { 1977 ipfw_insn *cmd; 1978 int l; 1979 1980 for (l = state->rule->cmd_len - state->rule->act_ofs, 1981 cmd = ACTION_PTR(state->rule); l > 0; 1982 l -= F_LEN(cmd), cmd += F_LEN(cmd)) { 1983 if (cmd->opcode != opcode) 1984 continue; 1985 if (!print_action_instruction(bp, fo, state, cmd)) 1986 continue; 1987 return (cmd); 1988 } 1989 return (NULL); 1990 } 1991 1992 static void 1993 print_proto(struct buf_pr *bp, struct format_opts *fo, 1994 struct show_state *state) 1995 { 1996 ipfw_insn *cmd; 1997 int l, proto, ip4, ip6; 1998 1999 /* Count all O_PROTO, O_IP4, O_IP6 instructions. */ 2000 proto = ip4 = ip6 = 0; 2001 for (l = state->rule->act_ofs, cmd = state->rule->cmd; 2002 l > 0; l -= F_LEN(cmd), cmd += F_LEN(cmd)) { 2003 switch (cmd->opcode) { 2004 case O_PROTO: 2005 proto++; 2006 break; 2007 case O_IP4: 2008 ip4 = 1; 2009 if (cmd->len & F_OR) 2010 ip4++; 2011 break; 2012 case O_IP6: 2013 ip6 = 1; 2014 if (cmd->len & F_OR) 2015 ip6++; 2016 break; 2017 default: 2018 continue; 2019 } 2020 } 2021 if (proto == 0 && ip4 == 0 && ip6 == 0) { 2022 state->proto = IPPROTO_IP; 2023 state->flags |= HAVE_PROTO; 2024 bprintf(bp, " ip"); 2025 return; 2026 } 2027 /* To handle the case { ip4 or ip6 }, print opcode with F_OR first */ 2028 cmd = NULL; 2029 if (ip4 || ip6) 2030 cmd = print_opcode(bp, fo, state, ip4 > ip6 ? O_IP4: O_IP6); 2031 if (cmd != NULL && (cmd->len & F_OR)) 2032 cmd = print_opcode(bp, fo, state, ip4 > ip6 ? O_IP6: O_IP4); 2033 if (cmd == NULL || (cmd->len & F_OR)) 2034 for (l = proto; l > 0; l--) { 2035 cmd = print_opcode(bp, fo, state, O_PROTO); 2036 if (cmd == NULL || (cmd->len & F_OR) == 0) 2037 break; 2038 } 2039 /* Initialize proto, it is used by print_newports() */ 2040 state->flags |= HAVE_PROTO; 2041 if (state->proto == 0 && ip6 != 0) 2042 state->proto = IPPROTO_IPV6; 2043 } 2044 2045 static int 2046 match_opcode(int opcode, const int opcodes[], size_t nops) 2047 { 2048 int i; 2049 2050 for (i = 0; i < nops; i++) 2051 if (opcode == opcodes[i]) 2052 return (1); 2053 return (0); 2054 } 2055 2056 static void 2057 print_address(struct buf_pr *bp, struct format_opts *fo, 2058 struct show_state *state, const int opcodes[], size_t nops, int portop, 2059 int flag) 2060 { 2061 ipfw_insn *cmd; 2062 int count, l, portcnt, pf; 2063 2064 count = portcnt = 0; 2065 for (l = state->rule->act_ofs, cmd = state->rule->cmd; 2066 l > 0; l -= F_LEN(cmd), cmd += F_LEN(cmd)) { 2067 if (match_opcode(cmd->opcode, opcodes, nops)) 2068 count++; 2069 else if (cmd->opcode == portop) 2070 portcnt++; 2071 } 2072 if (count == 0) 2073 bprintf(bp, " any"); 2074 for (l = state->rule->act_ofs, cmd = state->rule->cmd; 2075 l > 0 && count > 0; l -= F_LEN(cmd), cmd += F_LEN(cmd)) { 2076 if (!match_opcode(cmd->opcode, opcodes, nops)) 2077 continue; 2078 print_instruction(bp, fo, state, cmd); 2079 if ((cmd->len & F_OR) == 0) 2080 break; 2081 count--; 2082 } 2083 /* 2084 * If several O_IP_?PORT opcodes specified, leave them to the 2085 * options section. 2086 */ 2087 if (portcnt == 1) { 2088 for (l = state->rule->act_ofs, cmd = state->rule->cmd, pf = 0; 2089 l > 0; l -= F_LEN(cmd), cmd += F_LEN(cmd)) { 2090 if (cmd->opcode != portop) { 2091 pf = (cmd->len & F_OR); 2092 continue; 2093 } 2094 /* Print opcode iff it is not in OR block. */ 2095 if (pf == 0 && (cmd->len & F_OR) == 0) 2096 print_instruction(bp, fo, state, cmd); 2097 break; 2098 } 2099 } 2100 state->flags |= flag; 2101 } 2102 2103 static const int action_opcodes[] = { 2104 O_CHECK_STATE, O_ACCEPT, O_COUNT, O_DENY, O_REJECT, 2105 O_UNREACH6, O_SKIPTO, O_PIPE, O_QUEUE, O_DIVERT, O_TEE, 2106 O_NETGRAPH, O_NGTEE, O_FORWARD_IP, O_FORWARD_IP6, O_NAT, 2107 O_SETFIB, O_SETDSCP, O_REASS, O_CALLRETURN, 2108 /* keep the following opcodes at the end of the list */ 2109 O_EXTERNAL_ACTION, O_EXTERNAL_INSTANCE, O_EXTERNAL_DATA 2110 }; 2111 2112 static const int modifier_opcodes[] = { 2113 O_LOG, O_ALTQ, O_TAG 2114 }; 2115 2116 static const int src_opcodes[] = { 2117 O_IP_SRC, O_IP_SRC_LOOKUP, O_IP_SRC_MASK, O_IP_SRC_ME, 2118 O_IP_SRC_SET, O_IP6_SRC, O_IP6_SRC_MASK, O_IP6_SRC_ME 2119 }; 2120 2121 static const int dst_opcodes[] = { 2122 O_IP_DST, O_IP_DST_LOOKUP, O_IP_DST_MASK, O_IP_DST_ME, 2123 O_IP_DST_SET, O_IP6_DST, O_IP6_DST_MASK, O_IP6_DST_ME 2124 }; 2125 2126 static void 2127 show_static_rule(struct cmdline_opts *co, struct format_opts *fo, 2128 struct buf_pr *bp, struct ip_fw_rule *rule, struct ip_fw_bcounter *cntr) 2129 { 2130 struct show_state state; 2131 ipfw_insn *cmd; 2132 static int twidth = 0; 2133 int i; 2134 2135 /* Print # DISABLED or skip the rule */ 2136 if ((fo->set_mask & (1 << rule->set)) == 0) { 2137 /* disabled mask */ 2138 if (!co->show_sets) 2139 return; 2140 else 2141 bprintf(bp, "# DISABLED "); 2142 } 2143 if (init_show_state(&state, rule) != 0) { 2144 warn("init_show_state() failed"); 2145 return; 2146 } 2147 bprintf(bp, "%05u ", rule->rulenum); 2148 2149 /* Print counters if enabled */ 2150 if (fo->pcwidth > 0 || fo->bcwidth > 0) { 2151 pr_u64(bp, &cntr->pcnt, fo->pcwidth); 2152 pr_u64(bp, &cntr->bcnt, fo->bcwidth); 2153 } 2154 2155 /* Print timestamp */ 2156 if (co->do_time == TIMESTAMP_NUMERIC) 2157 bprintf(bp, "%10u ", cntr->timestamp); 2158 else if (co->do_time == TIMESTAMP_STRING) { 2159 char timestr[30]; 2160 time_t t = (time_t)0; 2161 2162 if (twidth == 0) { 2163 strcpy(timestr, ctime(&t)); 2164 *strchr(timestr, '\n') = '\0'; 2165 twidth = strlen(timestr); 2166 } 2167 if (cntr->timestamp > 0) { 2168 t = _long_to_time(cntr->timestamp); 2169 2170 strcpy(timestr, ctime(&t)); 2171 *strchr(timestr, '\n') = '\0'; 2172 bprintf(bp, "%s ", timestr); 2173 } else { 2174 bprintf(bp, "%*s", twidth, " "); 2175 } 2176 } 2177 2178 /* Print set number */ 2179 if (co->show_sets) 2180 bprintf(bp, "set %d ", rule->set); 2181 2182 /* Print the optional "match probability" */ 2183 cmd = print_opcode(bp, fo, &state, O_PROB); 2184 /* Print rule action */ 2185 for (i = 0; i < nitems(action_opcodes); i++) { 2186 cmd = print_action(bp, fo, &state, action_opcodes[i]); 2187 if (cmd == NULL) 2188 continue; 2189 /* Handle special cases */ 2190 switch (cmd->opcode) { 2191 case O_CHECK_STATE: 2192 goto end; 2193 case O_EXTERNAL_ACTION: 2194 case O_EXTERNAL_INSTANCE: 2195 /* External action can have several instructions */ 2196 continue; 2197 } 2198 break; 2199 } 2200 /* Print rule modifiers */ 2201 for (i = 0; i < nitems(modifier_opcodes); i++) 2202 print_action(bp, fo, &state, modifier_opcodes[i]); 2203 /* 2204 * Print rule body 2205 */ 2206 if (co->comment_only != 0) 2207 goto end; 2208 2209 if (rule->flags & IPFW_RULE_JUSTOPTS) { 2210 state.flags |= HAVE_PROTO | HAVE_SRCIP | HAVE_DSTIP; 2211 goto justopts; 2212 } 2213 2214 print_proto(bp, fo, &state); 2215 2216 /* Print source */ 2217 bprintf(bp, " from"); 2218 print_address(bp, fo, &state, src_opcodes, nitems(src_opcodes), 2219 O_IP_SRCPORT, HAVE_SRCIP); 2220 2221 /* Print destination */ 2222 bprintf(bp, " to"); 2223 print_address(bp, fo, &state, dst_opcodes, nitems(dst_opcodes), 2224 O_IP_DSTPORT, HAVE_DSTIP); 2225 2226 justopts: 2227 /* Print the rest of options */ 2228 while (print_opcode(bp, fo, &state, -1)) 2229 ; 2230 end: 2231 /* Print comment at the end */ 2232 cmd = print_opcode(bp, fo, &state, O_NOP); 2233 if (co->comment_only != 0 && cmd == NULL) 2234 bprintf(bp, " // ..."); 2235 bprintf(bp, "\n"); 2236 free_show_state(&state); 2237 } 2238 2239 static void 2240 show_dyn_state(struct cmdline_opts *co, struct format_opts *fo, 2241 struct buf_pr *bp, ipfw_dyn_rule *d) 2242 { 2243 struct protoent *pe; 2244 struct in_addr a; 2245 uint16_t rulenum; 2246 char buf[INET6_ADDRSTRLEN]; 2247 2248 if (d->expire == 0 && d->dyn_type != O_LIMIT_PARENT) 2249 return; 2250 2251 bcopy(&d->rule, &rulenum, sizeof(rulenum)); 2252 bprintf(bp, "%05d", rulenum); 2253 if (fo->pcwidth > 0 || fo->bcwidth > 0) { 2254 bprintf(bp, " "); 2255 pr_u64(bp, &d->pcnt, fo->pcwidth); 2256 pr_u64(bp, &d->bcnt, fo->bcwidth); 2257 bprintf(bp, "(%ds)", d->expire); 2258 } 2259 switch (d->dyn_type) { 2260 case O_LIMIT_PARENT: 2261 bprintf(bp, " PARENT %d", d->count); 2262 break; 2263 case O_LIMIT: 2264 bprintf(bp, " LIMIT"); 2265 break; 2266 case O_KEEP_STATE: /* bidir, no mask */ 2267 bprintf(bp, " STATE"); 2268 break; 2269 } 2270 2271 if ((pe = getprotobynumber(d->id.proto)) != NULL) 2272 bprintf(bp, " %s", pe->p_name); 2273 else 2274 bprintf(bp, " proto %u", d->id.proto); 2275 2276 if (d->id.addr_type == 4) { 2277 a.s_addr = htonl(d->id.src_ip); 2278 bprintf(bp, " %s %d", inet_ntoa(a), d->id.src_port); 2279 2280 a.s_addr = htonl(d->id.dst_ip); 2281 bprintf(bp, " <-> %s %d", inet_ntoa(a), d->id.dst_port); 2282 } else if (d->id.addr_type == 6) { 2283 bprintf(bp, " %s %d", inet_ntop(AF_INET6, &d->id.src_ip6, buf, 2284 sizeof(buf)), d->id.src_port); 2285 bprintf(bp, " <-> %s %d", inet_ntop(AF_INET6, &d->id.dst_ip6, 2286 buf, sizeof(buf)), d->id.dst_port); 2287 } else 2288 bprintf(bp, " UNKNOWN <-> UNKNOWN"); 2289 if (d->kidx != 0) 2290 bprintf(bp, " :%s", object_search_ctlv(fo->tstate, 2291 d->kidx, IPFW_TLV_STATE_NAME)); 2292 2293 #define BOTH_SYN (TH_SYN | (TH_SYN << 8)) 2294 #define BOTH_FIN (TH_FIN | (TH_FIN << 8)) 2295 if (co->verbose) { 2296 bprintf(bp, " state 0x%08x%s", d->state, 2297 d->state ? " ": ","); 2298 if (d->state & IPFW_DYN_ORPHANED) 2299 bprintf(bp, "ORPHANED,"); 2300 if ((d->state & BOTH_SYN) == BOTH_SYN) 2301 bprintf(bp, "BOTH_SYN,"); 2302 else { 2303 if (d->state & TH_SYN) 2304 bprintf(bp, "F_SYN,"); 2305 if (d->state & (TH_SYN << 8)) 2306 bprintf(bp, "R_SYN,"); 2307 } 2308 if ((d->state & BOTH_FIN) == BOTH_FIN) 2309 bprintf(bp, "BOTH_FIN,"); 2310 else { 2311 if (d->state & TH_FIN) 2312 bprintf(bp, "F_FIN,"); 2313 if (d->state & (TH_FIN << 8)) 2314 bprintf(bp, "R_FIN,"); 2315 } 2316 bprintf(bp, " f_ack 0x%x, r_ack 0x%x", d->ack_fwd, 2317 d->ack_rev); 2318 } 2319 } 2320 2321 static int 2322 do_range_cmd(int cmd, ipfw_range_tlv *rt) 2323 { 2324 ipfw_range_header rh; 2325 size_t sz; 2326 2327 memset(&rh, 0, sizeof(rh)); 2328 memcpy(&rh.range, rt, sizeof(*rt)); 2329 rh.range.head.length = sizeof(*rt); 2330 rh.range.head.type = IPFW_TLV_RANGE; 2331 sz = sizeof(rh); 2332 2333 if (do_get3(cmd, &rh.opheader, &sz) != 0) 2334 return (-1); 2335 /* Save number of matched objects */ 2336 rt->new_set = rh.range.new_set; 2337 return (0); 2338 } 2339 2340 /* 2341 * This one handles all set-related commands 2342 * ipfw set { show | enable | disable } 2343 * ipfw set swap X Y 2344 * ipfw set move X to Y 2345 * ipfw set move rule X to Y 2346 */ 2347 void 2348 ipfw_sets_handler(char *av[]) 2349 { 2350 ipfw_range_tlv rt; 2351 char *msg; 2352 size_t size; 2353 uint32_t masks[2]; 2354 int i; 2355 uint16_t rulenum; 2356 uint8_t cmd; 2357 2358 av++; 2359 memset(&rt, 0, sizeof(rt)); 2360 2361 if (av[0] == NULL) 2362 errx(EX_USAGE, "set needs command"); 2363 if (_substrcmp(*av, "show") == 0) { 2364 struct format_opts fo; 2365 ipfw_cfg_lheader *cfg; 2366 2367 memset(&fo, 0, sizeof(fo)); 2368 if (ipfw_get_config(&co, &fo, &cfg, &size) != 0) 2369 err(EX_OSERR, "requesting config failed"); 2370 2371 for (i = 0, msg = "disable"; i < RESVD_SET; i++) 2372 if ((cfg->set_mask & (1<<i)) == 0) { 2373 printf("%s %d", msg, i); 2374 msg = ""; 2375 } 2376 msg = (cfg->set_mask != (uint32_t)-1) ? " enable" : "enable"; 2377 for (i = 0; i < RESVD_SET; i++) 2378 if ((cfg->set_mask & (1<<i)) != 0) { 2379 printf("%s %d", msg, i); 2380 msg = ""; 2381 } 2382 printf("\n"); 2383 free(cfg); 2384 } else if (_substrcmp(*av, "swap") == 0) { 2385 av++; 2386 if ( av[0] == NULL || av[1] == NULL ) 2387 errx(EX_USAGE, "set swap needs 2 set numbers\n"); 2388 rt.set = atoi(av[0]); 2389 rt.new_set = atoi(av[1]); 2390 if (!isdigit(*(av[0])) || rt.set > RESVD_SET) 2391 errx(EX_DATAERR, "invalid set number %s\n", av[0]); 2392 if (!isdigit(*(av[1])) || rt.new_set > RESVD_SET) 2393 errx(EX_DATAERR, "invalid set number %s\n", av[1]); 2394 i = do_range_cmd(IP_FW_SET_SWAP, &rt); 2395 } else if (_substrcmp(*av, "move") == 0) { 2396 av++; 2397 if (av[0] && _substrcmp(*av, "rule") == 0) { 2398 rt.flags = IPFW_RCFLAG_RANGE; /* move rules to new set */ 2399 cmd = IP_FW_XMOVE; 2400 av++; 2401 } else 2402 cmd = IP_FW_SET_MOVE; /* Move set to new one */ 2403 if (av[0] == NULL || av[1] == NULL || av[2] == NULL || 2404 av[3] != NULL || _substrcmp(av[1], "to") != 0) 2405 errx(EX_USAGE, "syntax: set move [rule] X to Y\n"); 2406 rulenum = atoi(av[0]); 2407 rt.new_set = atoi(av[2]); 2408 if (cmd == IP_FW_XMOVE) { 2409 rt.start_rule = rulenum; 2410 rt.end_rule = rulenum; 2411 } else 2412 rt.set = rulenum; 2413 rt.new_set = atoi(av[2]); 2414 if (!isdigit(*(av[0])) || (cmd == 3 && rt.set > RESVD_SET) || 2415 (cmd == 2 && rt.start_rule == IPFW_DEFAULT_RULE) ) 2416 errx(EX_DATAERR, "invalid source number %s\n", av[0]); 2417 if (!isdigit(*(av[2])) || rt.new_set > RESVD_SET) 2418 errx(EX_DATAERR, "invalid dest. set %s\n", av[1]); 2419 i = do_range_cmd(cmd, &rt); 2420 if (i < 0) 2421 err(EX_OSERR, "failed to move %s", 2422 cmd == IP_FW_SET_MOVE ? "set": "rule"); 2423 } else if (_substrcmp(*av, "disable") == 0 || 2424 _substrcmp(*av, "enable") == 0 ) { 2425 int which = _substrcmp(*av, "enable") == 0 ? 1 : 0; 2426 2427 av++; 2428 masks[0] = masks[1] = 0; 2429 2430 while (av[0]) { 2431 if (isdigit(**av)) { 2432 i = atoi(*av); 2433 if (i < 0 || i > RESVD_SET) 2434 errx(EX_DATAERR, 2435 "invalid set number %d\n", i); 2436 masks[which] |= (1<<i); 2437 } else if (_substrcmp(*av, "disable") == 0) 2438 which = 0; 2439 else if (_substrcmp(*av, "enable") == 0) 2440 which = 1; 2441 else 2442 errx(EX_DATAERR, 2443 "invalid set command %s\n", *av); 2444 av++; 2445 } 2446 if ( (masks[0] & masks[1]) != 0 ) 2447 errx(EX_DATAERR, 2448 "cannot enable and disable the same set\n"); 2449 2450 rt.set = masks[0]; 2451 rt.new_set = masks[1]; 2452 i = do_range_cmd(IP_FW_SET_ENABLE, &rt); 2453 if (i) 2454 warn("set enable/disable: setsockopt(IP_FW_SET_ENABLE)"); 2455 } else 2456 errx(EX_USAGE, "invalid set command %s\n", *av); 2457 } 2458 2459 void 2460 ipfw_sysctl_handler(char *av[], int which) 2461 { 2462 av++; 2463 2464 if (av[0] == NULL) { 2465 warnx("missing keyword to enable/disable\n"); 2466 } else if (_substrcmp(*av, "firewall") == 0) { 2467 sysctlbyname("net.inet.ip.fw.enable", NULL, 0, 2468 &which, sizeof(which)); 2469 sysctlbyname("net.inet6.ip6.fw.enable", NULL, 0, 2470 &which, sizeof(which)); 2471 } else if (_substrcmp(*av, "one_pass") == 0) { 2472 sysctlbyname("net.inet.ip.fw.one_pass", NULL, 0, 2473 &which, sizeof(which)); 2474 } else if (_substrcmp(*av, "debug") == 0) { 2475 sysctlbyname("net.inet.ip.fw.debug", NULL, 0, 2476 &which, sizeof(which)); 2477 } else if (_substrcmp(*av, "verbose") == 0) { 2478 sysctlbyname("net.inet.ip.fw.verbose", NULL, 0, 2479 &which, sizeof(which)); 2480 } else if (_substrcmp(*av, "dyn_keepalive") == 0) { 2481 sysctlbyname("net.inet.ip.fw.dyn_keepalive", NULL, 0, 2482 &which, sizeof(which)); 2483 #ifndef NO_ALTQ 2484 } else if (_substrcmp(*av, "altq") == 0) { 2485 altq_set_enabled(which); 2486 #endif 2487 } else { 2488 warnx("unrecognize enable/disable keyword: %s\n", *av); 2489 } 2490 } 2491 2492 typedef void state_cb(struct cmdline_opts *co, struct format_opts *fo, 2493 void *arg, void *state); 2494 2495 static void 2496 prepare_format_dyn(struct cmdline_opts *co, struct format_opts *fo, 2497 void *arg, void *_state) 2498 { 2499 ipfw_dyn_rule *d; 2500 int width; 2501 uint8_t set; 2502 2503 d = (ipfw_dyn_rule *)_state; 2504 /* Count _ALL_ states */ 2505 fo->dcnt++; 2506 2507 if (fo->show_counters == 0) 2508 return; 2509 2510 if (co->use_set) { 2511 /* skip states from another set */ 2512 bcopy((char *)&d->rule + sizeof(uint16_t), &set, 2513 sizeof(uint8_t)); 2514 if (set != co->use_set - 1) 2515 return; 2516 } 2517 2518 width = pr_u64(NULL, &d->pcnt, 0); 2519 if (width > fo->pcwidth) 2520 fo->pcwidth = width; 2521 2522 width = pr_u64(NULL, &d->bcnt, 0); 2523 if (width > fo->bcwidth) 2524 fo->bcwidth = width; 2525 } 2526 2527 static int 2528 foreach_state(struct cmdline_opts *co, struct format_opts *fo, 2529 caddr_t base, size_t sz, state_cb dyn_bc, void *dyn_arg) 2530 { 2531 int ttype; 2532 state_cb *fptr; 2533 void *farg; 2534 ipfw_obj_tlv *tlv; 2535 ipfw_obj_ctlv *ctlv; 2536 2537 fptr = NULL; 2538 ttype = 0; 2539 2540 while (sz > 0) { 2541 ctlv = (ipfw_obj_ctlv *)base; 2542 switch (ctlv->head.type) { 2543 case IPFW_TLV_DYNSTATE_LIST: 2544 base += sizeof(*ctlv); 2545 sz -= sizeof(*ctlv); 2546 ttype = IPFW_TLV_DYN_ENT; 2547 fptr = dyn_bc; 2548 farg = dyn_arg; 2549 break; 2550 default: 2551 return (sz); 2552 } 2553 2554 while (sz > 0) { 2555 tlv = (ipfw_obj_tlv *)base; 2556 if (tlv->type != ttype) 2557 break; 2558 2559 fptr(co, fo, farg, tlv + 1); 2560 sz -= tlv->length; 2561 base += tlv->length; 2562 } 2563 } 2564 2565 return (sz); 2566 } 2567 2568 static void 2569 prepare_format_opts(struct cmdline_opts *co, struct format_opts *fo, 2570 ipfw_obj_tlv *rtlv, int rcnt, caddr_t dynbase, size_t dynsz) 2571 { 2572 int bcwidth, pcwidth, width; 2573 int n; 2574 struct ip_fw_bcounter *cntr; 2575 struct ip_fw_rule *r; 2576 2577 bcwidth = 0; 2578 pcwidth = 0; 2579 if (fo->show_counters != 0) { 2580 for (n = 0; n < rcnt; n++, 2581 rtlv = (ipfw_obj_tlv *)((caddr_t)rtlv + rtlv->length)) { 2582 cntr = (struct ip_fw_bcounter *)(rtlv + 1); 2583 r = (struct ip_fw_rule *)((caddr_t)cntr + cntr->size); 2584 /* skip rules from another set */ 2585 if (co->use_set && r->set != co->use_set - 1) 2586 continue; 2587 2588 /* packet counter */ 2589 width = pr_u64(NULL, &cntr->pcnt, 0); 2590 if (width > pcwidth) 2591 pcwidth = width; 2592 2593 /* byte counter */ 2594 width = pr_u64(NULL, &cntr->bcnt, 0); 2595 if (width > bcwidth) 2596 bcwidth = width; 2597 } 2598 } 2599 fo->bcwidth = bcwidth; 2600 fo->pcwidth = pcwidth; 2601 2602 fo->dcnt = 0; 2603 if (co->do_dynamic && dynsz > 0) 2604 foreach_state(co, fo, dynbase, dynsz, prepare_format_dyn, NULL); 2605 } 2606 2607 static int 2608 list_static_range(struct cmdline_opts *co, struct format_opts *fo, 2609 struct buf_pr *bp, ipfw_obj_tlv *rtlv, int rcnt) 2610 { 2611 int n, seen; 2612 struct ip_fw_rule *r; 2613 struct ip_fw_bcounter *cntr; 2614 int c = 0; 2615 2616 for (n = seen = 0; n < rcnt; n++, 2617 rtlv = (ipfw_obj_tlv *)((caddr_t)rtlv + rtlv->length)) { 2618 2619 if ((fo->show_counters | fo->show_time) != 0) { 2620 cntr = (struct ip_fw_bcounter *)(rtlv + 1); 2621 r = (struct ip_fw_rule *)((caddr_t)cntr + cntr->size); 2622 } else { 2623 cntr = NULL; 2624 r = (struct ip_fw_rule *)(rtlv + 1); 2625 } 2626 if (r->rulenum > fo->last) 2627 break; 2628 if (co->use_set && r->set != co->use_set - 1) 2629 continue; 2630 if (r->rulenum >= fo->first && r->rulenum <= fo->last) { 2631 show_static_rule(co, fo, bp, r, cntr); 2632 printf("%s", bp->buf); 2633 c += rtlv->length; 2634 bp_flush(bp); 2635 seen++; 2636 } 2637 } 2638 2639 return (seen); 2640 } 2641 2642 static void 2643 list_dyn_state(struct cmdline_opts *co, struct format_opts *fo, 2644 void *_arg, void *_state) 2645 { 2646 uint16_t rulenum; 2647 uint8_t set; 2648 ipfw_dyn_rule *d; 2649 struct buf_pr *bp; 2650 2651 d = (ipfw_dyn_rule *)_state; 2652 bp = (struct buf_pr *)_arg; 2653 2654 bcopy(&d->rule, &rulenum, sizeof(rulenum)); 2655 if (rulenum > fo->last) 2656 return; 2657 if (co->use_set) { 2658 bcopy((char *)&d->rule + sizeof(uint16_t), 2659 &set, sizeof(uint8_t)); 2660 if (set != co->use_set - 1) 2661 return; 2662 } 2663 if (rulenum >= fo->first) { 2664 show_dyn_state(co, fo, bp, d); 2665 printf("%s\n", bp->buf); 2666 bp_flush(bp); 2667 } 2668 } 2669 2670 static int 2671 list_dyn_range(struct cmdline_opts *co, struct format_opts *fo, 2672 struct buf_pr *bp, caddr_t base, size_t sz) 2673 { 2674 2675 sz = foreach_state(co, fo, base, sz, list_dyn_state, bp); 2676 return (sz); 2677 } 2678 2679 void 2680 ipfw_list(int ac, char *av[], int show_counters) 2681 { 2682 ipfw_cfg_lheader *cfg; 2683 struct format_opts sfo; 2684 size_t sz; 2685 int error; 2686 int lac; 2687 char **lav; 2688 uint32_t rnum; 2689 char *endptr; 2690 2691 if (co.test_only) { 2692 fprintf(stderr, "Testing only, list disabled\n"); 2693 return; 2694 } 2695 if (co.do_pipe) { 2696 dummynet_list(ac, av, show_counters); 2697 return; 2698 } 2699 2700 ac--; 2701 av++; 2702 memset(&sfo, 0, sizeof(sfo)); 2703 2704 /* Determine rule range to request */ 2705 if (ac > 0) { 2706 for (lac = ac, lav = av; lac != 0; lac--) { 2707 rnum = strtoul(*lav++, &endptr, 10); 2708 if (sfo.first == 0 || rnum < sfo.first) 2709 sfo.first = rnum; 2710 2711 if (*endptr == '-') 2712 rnum = strtoul(endptr + 1, &endptr, 10); 2713 if (sfo.last == 0 || rnum > sfo.last) 2714 sfo.last = rnum; 2715 } 2716 } 2717 2718 /* get configuraion from kernel */ 2719 cfg = NULL; 2720 sfo.show_counters = show_counters; 2721 sfo.show_time = co.do_time; 2722 if (co.do_dynamic != 2) 2723 sfo.flags |= IPFW_CFG_GET_STATIC; 2724 if (co.do_dynamic != 0) 2725 sfo.flags |= IPFW_CFG_GET_STATES; 2726 if ((sfo.show_counters | sfo.show_time) != 0) 2727 sfo.flags |= IPFW_CFG_GET_COUNTERS; 2728 if (ipfw_get_config(&co, &sfo, &cfg, &sz) != 0) 2729 err(EX_OSERR, "retrieving config failed"); 2730 2731 error = ipfw_show_config(&co, &sfo, cfg, sz, ac, av); 2732 2733 free(cfg); 2734 2735 if (error != EX_OK) 2736 exit(error); 2737 } 2738 2739 static int 2740 ipfw_show_config(struct cmdline_opts *co, struct format_opts *fo, 2741 ipfw_cfg_lheader *cfg, size_t sz, int ac, char *av[]) 2742 { 2743 caddr_t dynbase; 2744 size_t dynsz; 2745 int rcnt; 2746 int exitval = EX_OK; 2747 int lac; 2748 char **lav; 2749 char *endptr; 2750 size_t readsz; 2751 struct buf_pr bp; 2752 ipfw_obj_ctlv *ctlv, *tstate; 2753 ipfw_obj_tlv *rbase; 2754 2755 /* 2756 * Handle tablenames TLV first, if any 2757 */ 2758 tstate = NULL; 2759 rbase = NULL; 2760 dynbase = NULL; 2761 dynsz = 0; 2762 readsz = sizeof(*cfg); 2763 rcnt = 0; 2764 2765 fo->set_mask = cfg->set_mask; 2766 2767 ctlv = (ipfw_obj_ctlv *)(cfg + 1); 2768 if (ctlv->head.type == IPFW_TLV_TBLNAME_LIST) { 2769 object_sort_ctlv(ctlv); 2770 fo->tstate = ctlv; 2771 readsz += ctlv->head.length; 2772 ctlv = (ipfw_obj_ctlv *)((caddr_t)ctlv + ctlv->head.length); 2773 } 2774 2775 if (cfg->flags & IPFW_CFG_GET_STATIC) { 2776 /* We've requested static rules */ 2777 if (ctlv->head.type == IPFW_TLV_RULE_LIST) { 2778 rbase = (ipfw_obj_tlv *)(ctlv + 1); 2779 rcnt = ctlv->count; 2780 readsz += ctlv->head.length; 2781 ctlv = (ipfw_obj_ctlv *)((caddr_t)ctlv + 2782 ctlv->head.length); 2783 } 2784 } 2785 2786 if ((cfg->flags & IPFW_CFG_GET_STATES) && (readsz != sz)) { 2787 /* We may have some dynamic states */ 2788 dynsz = sz - readsz; 2789 /* Skip empty header */ 2790 if (dynsz != sizeof(ipfw_obj_ctlv)) 2791 dynbase = (caddr_t)ctlv; 2792 else 2793 dynsz = 0; 2794 } 2795 2796 prepare_format_opts(co, fo, rbase, rcnt, dynbase, dynsz); 2797 bp_alloc(&bp, 4096); 2798 2799 /* if no rule numbers were specified, list all rules */ 2800 if (ac == 0) { 2801 fo->first = 0; 2802 fo->last = IPFW_DEFAULT_RULE; 2803 if (cfg->flags & IPFW_CFG_GET_STATIC) 2804 list_static_range(co, fo, &bp, rbase, rcnt); 2805 2806 if (co->do_dynamic && dynsz > 0) { 2807 printf("## Dynamic rules (%d %zu):\n", fo->dcnt, 2808 dynsz); 2809 list_dyn_range(co, fo, &bp, dynbase, dynsz); 2810 } 2811 2812 bp_free(&bp); 2813 return (EX_OK); 2814 } 2815 2816 /* display specific rules requested on command line */ 2817 for (lac = ac, lav = av; lac != 0; lac--) { 2818 /* convert command line rule # */ 2819 fo->last = fo->first = strtoul(*lav++, &endptr, 10); 2820 if (*endptr == '-') 2821 fo->last = strtoul(endptr + 1, &endptr, 10); 2822 if (*endptr) { 2823 exitval = EX_USAGE; 2824 warnx("invalid rule number: %s", *(lav - 1)); 2825 continue; 2826 } 2827 2828 if ((cfg->flags & IPFW_CFG_GET_STATIC) == 0) 2829 continue; 2830 2831 if (list_static_range(co, fo, &bp, rbase, rcnt) == 0) { 2832 /* give precedence to other error(s) */ 2833 if (exitval == EX_OK) 2834 exitval = EX_UNAVAILABLE; 2835 if (fo->first == fo->last) 2836 warnx("rule %u does not exist", fo->first); 2837 else 2838 warnx("no rules in range %u-%u", 2839 fo->first, fo->last); 2840 } 2841 } 2842 2843 if (co->do_dynamic && dynsz > 0) { 2844 printf("## Dynamic rules:\n"); 2845 for (lac = ac, lav = av; lac != 0; lac--) { 2846 fo->last = fo->first = strtoul(*lav++, &endptr, 10); 2847 if (*endptr == '-') 2848 fo->last = strtoul(endptr+1, &endptr, 10); 2849 if (*endptr) 2850 /* already warned */ 2851 continue; 2852 list_dyn_range(co, fo, &bp, dynbase, dynsz); 2853 } 2854 } 2855 2856 bp_free(&bp); 2857 return (exitval); 2858 } 2859 2860 2861 /* 2862 * Retrieves current ipfw configuration of given type 2863 * and stores its pointer to @pcfg. 2864 * 2865 * Caller is responsible for freeing @pcfg. 2866 * 2867 * Returns 0 on success. 2868 */ 2869 2870 static int 2871 ipfw_get_config(struct cmdline_opts *co, struct format_opts *fo, 2872 ipfw_cfg_lheader **pcfg, size_t *psize) 2873 { 2874 ipfw_cfg_lheader *cfg; 2875 size_t sz; 2876 int i; 2877 2878 2879 if (co->test_only != 0) { 2880 fprintf(stderr, "Testing only, list disabled\n"); 2881 return (0); 2882 } 2883 2884 /* Start with some data size */ 2885 sz = 4096; 2886 cfg = NULL; 2887 2888 for (i = 0; i < 16; i++) { 2889 if (cfg != NULL) 2890 free(cfg); 2891 if ((cfg = calloc(1, sz)) == NULL) 2892 return (ENOMEM); 2893 2894 cfg->flags = fo->flags; 2895 cfg->start_rule = fo->first; 2896 cfg->end_rule = fo->last; 2897 2898 if (do_get3(IP_FW_XGET, &cfg->opheader, &sz) != 0) { 2899 if (errno != ENOMEM) { 2900 free(cfg); 2901 return (errno); 2902 } 2903 2904 /* Buffer size is not enough. Try to increase */ 2905 sz = sz * 2; 2906 if (sz < cfg->size) 2907 sz = cfg->size; 2908 continue; 2909 } 2910 2911 *pcfg = cfg; 2912 *psize = sz; 2913 return (0); 2914 } 2915 2916 free(cfg); 2917 return (ENOMEM); 2918 } 2919 2920 static int 2921 lookup_host (char *host, struct in_addr *ipaddr) 2922 { 2923 struct hostent *he; 2924 2925 if (!inet_aton(host, ipaddr)) { 2926 if ((he = gethostbyname(host)) == NULL) 2927 return(-1); 2928 *ipaddr = *(struct in_addr *)he->h_addr_list[0]; 2929 } 2930 return(0); 2931 } 2932 2933 struct tidx { 2934 ipfw_obj_ntlv *idx; 2935 uint32_t count; 2936 uint32_t size; 2937 uint16_t counter; 2938 uint8_t set; 2939 }; 2940 2941 int 2942 ipfw_check_object_name(const char *name) 2943 { 2944 int c, i, l; 2945 2946 /* 2947 * Check that name is null-terminated and contains 2948 * valid symbols only. Valid mask is: 2949 * [a-zA-Z0-9\-_\.]{1,63} 2950 */ 2951 l = strlen(name); 2952 if (l == 0 || l >= 64) 2953 return (EINVAL); 2954 for (i = 0; i < l; i++) { 2955 c = name[i]; 2956 if (isalpha(c) || isdigit(c) || c == '_' || 2957 c == '-' || c == '.') 2958 continue; 2959 return (EINVAL); 2960 } 2961 return (0); 2962 } 2963 2964 static char *default_state_name = "default"; 2965 static int 2966 state_check_name(const char *name) 2967 { 2968 2969 if (ipfw_check_object_name(name) != 0) 2970 return (EINVAL); 2971 if (strcmp(name, "any") == 0) 2972 return (EINVAL); 2973 return (0); 2974 } 2975 2976 static int 2977 eaction_check_name(const char *name) 2978 { 2979 2980 if (ipfw_check_object_name(name) != 0) 2981 return (EINVAL); 2982 /* Restrict some 'special' names */ 2983 if (match_token(rule_actions, name) != -1 && 2984 match_token(rule_action_params, name) != -1) 2985 return (EINVAL); 2986 return (0); 2987 } 2988 2989 static uint16_t 2990 pack_object(struct tidx *tstate, char *name, int otype) 2991 { 2992 int i; 2993 ipfw_obj_ntlv *ntlv; 2994 2995 for (i = 0; i < tstate->count; i++) { 2996 if (strcmp(tstate->idx[i].name, name) != 0) 2997 continue; 2998 if (tstate->idx[i].set != tstate->set) 2999 continue; 3000 if (tstate->idx[i].head.type != otype) 3001 continue; 3002 3003 return (tstate->idx[i].idx); 3004 } 3005 3006 if (tstate->count + 1 > tstate->size) { 3007 tstate->size += 4; 3008 tstate->idx = realloc(tstate->idx, tstate->size * 3009 sizeof(ipfw_obj_ntlv)); 3010 if (tstate->idx == NULL) 3011 return (0); 3012 } 3013 3014 ntlv = &tstate->idx[i]; 3015 memset(ntlv, 0, sizeof(ipfw_obj_ntlv)); 3016 strlcpy(ntlv->name, name, sizeof(ntlv->name)); 3017 ntlv->head.type = otype; 3018 ntlv->head.length = sizeof(ipfw_obj_ntlv); 3019 ntlv->set = tstate->set; 3020 ntlv->idx = ++tstate->counter; 3021 tstate->count++; 3022 3023 return (ntlv->idx); 3024 } 3025 3026 static uint16_t 3027 pack_table(struct tidx *tstate, char *name) 3028 { 3029 3030 if (table_check_name(name) != 0) 3031 return (0); 3032 3033 return (pack_object(tstate, name, IPFW_TLV_TBL_NAME)); 3034 } 3035 3036 void 3037 fill_table(struct _ipfw_insn *cmd, char *av, uint8_t opcode, 3038 struct tidx *tstate) 3039 { 3040 uint32_t *d = ((ipfw_insn_u32 *)cmd)->d; 3041 uint16_t uidx; 3042 char *p; 3043 3044 if ((p = strchr(av + 6, ')')) == NULL) 3045 errx(EX_DATAERR, "forgotten parenthesis: '%s'", av); 3046 *p = '\0'; 3047 p = strchr(av + 6, ','); 3048 if (p) 3049 *p++ = '\0'; 3050 3051 if ((uidx = pack_table(tstate, av + 6)) == 0) 3052 errx(EX_DATAERR, "Invalid table name: %s", av + 6); 3053 3054 cmd->opcode = opcode; 3055 cmd->arg1 = uidx; 3056 if (p) { 3057 cmd->len |= F_INSN_SIZE(ipfw_insn_u32); 3058 d[0] = strtoul(p, NULL, 0); 3059 } else 3060 cmd->len |= F_INSN_SIZE(ipfw_insn); 3061 } 3062 3063 3064 /* 3065 * fills the addr and mask fields in the instruction as appropriate from av. 3066 * Update length as appropriate. 3067 * The following formats are allowed: 3068 * me returns O_IP_*_ME 3069 * 1.2.3.4 single IP address 3070 * 1.2.3.4:5.6.7.8 address:mask 3071 * 1.2.3.4/24 address/mask 3072 * 1.2.3.4/26{1,6,5,4,23} set of addresses in a subnet 3073 * We can have multiple comma-separated address/mask entries. 3074 */ 3075 static void 3076 fill_ip(ipfw_insn_ip *cmd, char *av, int cblen, struct tidx *tstate) 3077 { 3078 int len = 0; 3079 uint32_t *d = ((ipfw_insn_u32 *)cmd)->d; 3080 3081 cmd->o.len &= ~F_LEN_MASK; /* zero len */ 3082 3083 if (_substrcmp(av, "any") == 0) 3084 return; 3085 3086 if (_substrcmp(av, "me") == 0) { 3087 cmd->o.len |= F_INSN_SIZE(ipfw_insn); 3088 return; 3089 } 3090 3091 if (strncmp(av, "table(", 6) == 0) { 3092 fill_table(&cmd->o, av, O_IP_DST_LOOKUP, tstate); 3093 return; 3094 } 3095 3096 while (av) { 3097 /* 3098 * After the address we can have '/' or ':' indicating a mask, 3099 * ',' indicating another address follows, '{' indicating a 3100 * set of addresses of unspecified size. 3101 */ 3102 char *t = NULL, *p = strpbrk(av, "/:,{"); 3103 int masklen; 3104 char md, nd = '\0'; 3105 3106 CHECK_LENGTH(cblen, F_INSN_SIZE(ipfw_insn) + 2 + len); 3107 3108 if (p) { 3109 md = *p; 3110 *p++ = '\0'; 3111 if ((t = strpbrk(p, ",{")) != NULL) { 3112 nd = *t; 3113 *t = '\0'; 3114 } 3115 } else 3116 md = '\0'; 3117 3118 if (lookup_host(av, (struct in_addr *)&d[0]) != 0) 3119 errx(EX_NOHOST, "hostname ``%s'' unknown", av); 3120 switch (md) { 3121 case ':': 3122 if (!inet_aton(p, (struct in_addr *)&d[1])) 3123 errx(EX_DATAERR, "bad netmask ``%s''", p); 3124 break; 3125 case '/': 3126 masklen = atoi(p); 3127 if (masklen == 0) 3128 d[1] = htonl(0U); /* mask */ 3129 else if (masklen > 32) 3130 errx(EX_DATAERR, "bad width ``%s''", p); 3131 else 3132 d[1] = htonl(~0U << (32 - masklen)); 3133 break; 3134 case '{': /* no mask, assume /24 and put back the '{' */ 3135 d[1] = htonl(~0U << (32 - 24)); 3136 *(--p) = md; 3137 break; 3138 3139 case ',': /* single address plus continuation */ 3140 *(--p) = md; 3141 /* FALLTHROUGH */ 3142 case 0: /* initialization value */ 3143 default: 3144 d[1] = htonl(~0U); /* force /32 */ 3145 break; 3146 } 3147 d[0] &= d[1]; /* mask base address with mask */ 3148 if (t) 3149 *t = nd; 3150 /* find next separator */ 3151 if (p) 3152 p = strpbrk(p, ",{"); 3153 if (p && *p == '{') { 3154 /* 3155 * We have a set of addresses. They are stored as follows: 3156 * arg1 is the set size (powers of 2, 2..256) 3157 * addr is the base address IN HOST FORMAT 3158 * mask.. is an array of arg1 bits (rounded up to 3159 * the next multiple of 32) with bits set 3160 * for each host in the map. 3161 */ 3162 uint32_t *map = (uint32_t *)&cmd->mask; 3163 int low, high; 3164 int i = contigmask((uint8_t *)&(d[1]), 32); 3165 3166 if (len > 0) 3167 errx(EX_DATAERR, "address set cannot be in a list"); 3168 if (i < 24 || i > 31) 3169 errx(EX_DATAERR, "invalid set with mask %d\n", i); 3170 cmd->o.arg1 = 1<<(32-i); /* map length */ 3171 d[0] = ntohl(d[0]); /* base addr in host format */ 3172 cmd->o.opcode = O_IP_DST_SET; /* default */ 3173 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32) + (cmd->o.arg1+31)/32; 3174 for (i = 0; i < (cmd->o.arg1+31)/32 ; i++) 3175 map[i] = 0; /* clear map */ 3176 3177 av = p + 1; 3178 low = d[0] & 0xff; 3179 high = low + cmd->o.arg1 - 1; 3180 /* 3181 * Here, i stores the previous value when we specify a range 3182 * of addresses within a mask, e.g. 45-63. i = -1 means we 3183 * have no previous value. 3184 */ 3185 i = -1; /* previous value in a range */ 3186 while (isdigit(*av)) { 3187 char *s; 3188 int a = strtol(av, &s, 0); 3189 3190 if (s == av) { /* no parameter */ 3191 if (*av != '}') 3192 errx(EX_DATAERR, "set not closed\n"); 3193 if (i != -1) 3194 errx(EX_DATAERR, "incomplete range %d-", i); 3195 break; 3196 } 3197 if (a < low || a > high) 3198 errx(EX_DATAERR, "addr %d out of range [%d-%d]\n", 3199 a, low, high); 3200 a -= low; 3201 if (i == -1) /* no previous in range */ 3202 i = a; 3203 else { /* check that range is valid */ 3204 if (i > a) 3205 errx(EX_DATAERR, "invalid range %d-%d", 3206 i+low, a+low); 3207 if (*s == '-') 3208 errx(EX_DATAERR, "double '-' in range"); 3209 } 3210 for (; i <= a; i++) 3211 map[i/32] |= 1<<(i & 31); 3212 i = -1; 3213 if (*s == '-') 3214 i = a; 3215 else if (*s == '}') 3216 break; 3217 av = s+1; 3218 } 3219 return; 3220 } 3221 av = p; 3222 if (av) /* then *av must be a ',' */ 3223 av++; 3224 3225 /* Check this entry */ 3226 if (d[1] == 0) { /* "any", specified as x.x.x.x/0 */ 3227 /* 3228 * 'any' turns the entire list into a NOP. 3229 * 'not any' never matches, so it is removed from the 3230 * list unless it is the only item, in which case we 3231 * report an error. 3232 */ 3233 if (cmd->o.len & F_NOT) { /* "not any" never matches */ 3234 if (av == NULL && len == 0) /* only this entry */ 3235 errx(EX_DATAERR, "not any never matches"); 3236 } 3237 /* else do nothing and skip this entry */ 3238 return; 3239 } 3240 /* A single IP can be stored in an optimized format */ 3241 if (d[1] == (uint32_t)~0 && av == NULL && len == 0) { 3242 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32); 3243 return; 3244 } 3245 len += 2; /* two words... */ 3246 d += 2; 3247 } /* end while */ 3248 if (len + 1 > F_LEN_MASK) 3249 errx(EX_DATAERR, "address list too long"); 3250 cmd->o.len |= len+1; 3251 } 3252 3253 3254 /* n2mask sets n bits of the mask */ 3255 void 3256 n2mask(struct in6_addr *mask, int n) 3257 { 3258 static int minimask[9] = 3259 { 0x00, 0x80, 0xc0, 0xe0, 0xf0, 0xf8, 0xfc, 0xfe, 0xff }; 3260 u_char *p; 3261 3262 memset(mask, 0, sizeof(struct in6_addr)); 3263 p = (u_char *) mask; 3264 for (; n > 0; p++, n -= 8) { 3265 if (n >= 8) 3266 *p = 0xff; 3267 else 3268 *p = minimask[n]; 3269 } 3270 return; 3271 } 3272 3273 static void 3274 fill_flags_cmd(ipfw_insn *cmd, enum ipfw_opcodes opcode, 3275 struct _s_x *flags, char *p) 3276 { 3277 char *e; 3278 uint32_t set = 0, clear = 0; 3279 3280 if (fill_flags(flags, p, &e, &set, &clear) != 0) 3281 errx(EX_DATAERR, "invalid flag %s", e); 3282 3283 cmd->opcode = opcode; 3284 cmd->len = (cmd->len & (F_NOT | F_OR)) | 1; 3285 cmd->arg1 = (set & 0xff) | ( (clear & 0xff) << 8); 3286 } 3287 3288 3289 void 3290 ipfw_delete(char *av[]) 3291 { 3292 ipfw_range_tlv rt; 3293 char *sep; 3294 int i, j; 3295 int exitval = EX_OK; 3296 int do_set = 0; 3297 3298 av++; 3299 NEED1("missing rule specification"); 3300 if ( *av && _substrcmp(*av, "set") == 0) { 3301 /* Do not allow using the following syntax: 3302 * ipfw set N delete set M 3303 */ 3304 if (co.use_set) 3305 errx(EX_DATAERR, "invalid syntax"); 3306 do_set = 1; /* delete set */ 3307 av++; 3308 } 3309 3310 /* Rule number */ 3311 while (*av && isdigit(**av)) { 3312 i = strtol(*av, &sep, 10); 3313 j = i; 3314 if (*sep== '-') 3315 j = strtol(sep + 1, NULL, 10); 3316 av++; 3317 if (co.do_nat) { 3318 exitval = do_cmd(IP_FW_NAT_DEL, &i, sizeof i); 3319 if (exitval) { 3320 exitval = EX_UNAVAILABLE; 3321 if (co.do_quiet) 3322 continue; 3323 warn("nat %u not available", i); 3324 } 3325 } else if (co.do_pipe) { 3326 exitval = ipfw_delete_pipe(co.do_pipe, i); 3327 } else { 3328 memset(&rt, 0, sizeof(rt)); 3329 if (do_set != 0) { 3330 rt.set = i & 31; 3331 rt.flags = IPFW_RCFLAG_SET; 3332 } else { 3333 rt.start_rule = i & 0xffff; 3334 rt.end_rule = j & 0xffff; 3335 if (rt.start_rule == 0 && rt.end_rule == 0) 3336 rt.flags |= IPFW_RCFLAG_ALL; 3337 else 3338 rt.flags |= IPFW_RCFLAG_RANGE; 3339 if (co.use_set != 0) { 3340 rt.set = co.use_set - 1; 3341 rt.flags |= IPFW_RCFLAG_SET; 3342 } 3343 } 3344 if (co.do_dynamic == 2) 3345 rt.flags |= IPFW_RCFLAG_DYNAMIC; 3346 i = do_range_cmd(IP_FW_XDEL, &rt); 3347 if (i != 0) { 3348 exitval = EX_UNAVAILABLE; 3349 if (co.do_quiet) 3350 continue; 3351 warn("rule %u: setsockopt(IP_FW_XDEL)", 3352 rt.start_rule); 3353 } else if (rt.new_set == 0 && do_set == 0 && 3354 co.do_dynamic != 2) { 3355 exitval = EX_UNAVAILABLE; 3356 if (co.do_quiet) 3357 continue; 3358 if (rt.start_rule != rt.end_rule) 3359 warnx("no rules rules in %u-%u range", 3360 rt.start_rule, rt.end_rule); 3361 else 3362 warnx("rule %u not found", 3363 rt.start_rule); 3364 } 3365 } 3366 } 3367 if (exitval != EX_OK && co.do_force == 0) 3368 exit(exitval); 3369 } 3370 3371 3372 /* 3373 * fill the interface structure. We do not check the name as we can 3374 * create interfaces dynamically, so checking them at insert time 3375 * makes relatively little sense. 3376 * Interface names containing '*', '?', or '[' are assumed to be shell 3377 * patterns which match interfaces. 3378 */ 3379 static void 3380 fill_iface(ipfw_insn_if *cmd, char *arg, int cblen, struct tidx *tstate) 3381 { 3382 char *p; 3383 uint16_t uidx; 3384 3385 cmd->name[0] = '\0'; 3386 cmd->o.len |= F_INSN_SIZE(ipfw_insn_if); 3387 3388 CHECK_CMDLEN; 3389 3390 /* Parse the interface or address */ 3391 if (strcmp(arg, "any") == 0) 3392 cmd->o.len = 0; /* effectively ignore this command */ 3393 else if (strncmp(arg, "table(", 6) == 0) { 3394 if ((p = strchr(arg + 6, ')')) == NULL) 3395 errx(EX_DATAERR, "forgotten parenthesis: '%s'", arg); 3396 *p = '\0'; 3397 p = strchr(arg + 6, ','); 3398 if (p) 3399 *p++ = '\0'; 3400 if ((uidx = pack_table(tstate, arg + 6)) == 0) 3401 errx(EX_DATAERR, "Invalid table name: %s", arg + 6); 3402 3403 cmd->name[0] = '\1'; /* Special value indicating table */ 3404 cmd->p.kidx = uidx; 3405 } else if (!isdigit(*arg)) { 3406 strlcpy(cmd->name, arg, sizeof(cmd->name)); 3407 cmd->p.glob = strpbrk(arg, "*?[") != NULL ? 1 : 0; 3408 } else if (!inet_aton(arg, &cmd->p.ip)) 3409 errx(EX_DATAERR, "bad ip address ``%s''", arg); 3410 } 3411 3412 static void 3413 get_mac_addr_mask(const char *p, uint8_t *addr, uint8_t *mask) 3414 { 3415 int i; 3416 size_t l; 3417 char *ap, *ptr, *optr; 3418 struct ether_addr *mac; 3419 const char *macset = "0123456789abcdefABCDEF:"; 3420 3421 if (strcmp(p, "any") == 0) { 3422 for (i = 0; i < ETHER_ADDR_LEN; i++) 3423 addr[i] = mask[i] = 0; 3424 return; 3425 } 3426 3427 optr = ptr = strdup(p); 3428 if ((ap = strsep(&ptr, "&/")) != NULL && *ap != 0) { 3429 l = strlen(ap); 3430 if (strspn(ap, macset) != l || (mac = ether_aton(ap)) == NULL) 3431 errx(EX_DATAERR, "Incorrect MAC address"); 3432 bcopy(mac, addr, ETHER_ADDR_LEN); 3433 } else 3434 errx(EX_DATAERR, "Incorrect MAC address"); 3435 3436 if (ptr != NULL) { /* we have mask? */ 3437 if (p[ptr - optr - 1] == '/') { /* mask len */ 3438 long ml = strtol(ptr, &ap, 10); 3439 if (*ap != 0 || ml > ETHER_ADDR_LEN * 8 || ml < 0) 3440 errx(EX_DATAERR, "Incorrect mask length"); 3441 for (i = 0; ml > 0 && i < ETHER_ADDR_LEN; ml -= 8, i++) 3442 mask[i] = (ml >= 8) ? 0xff: (~0) << (8 - ml); 3443 } else { /* mask */ 3444 l = strlen(ptr); 3445 if (strspn(ptr, macset) != l || 3446 (mac = ether_aton(ptr)) == NULL) 3447 errx(EX_DATAERR, "Incorrect mask"); 3448 bcopy(mac, mask, ETHER_ADDR_LEN); 3449 } 3450 } else { /* default mask: ff:ff:ff:ff:ff:ff */ 3451 for (i = 0; i < ETHER_ADDR_LEN; i++) 3452 mask[i] = 0xff; 3453 } 3454 for (i = 0; i < ETHER_ADDR_LEN; i++) 3455 addr[i] &= mask[i]; 3456 3457 free(optr); 3458 } 3459 3460 /* 3461 * helper function, updates the pointer to cmd with the length 3462 * of the current command, and also cleans up the first word of 3463 * the new command in case it has been clobbered before. 3464 */ 3465 static ipfw_insn * 3466 next_cmd(ipfw_insn *cmd, int *len) 3467 { 3468 *len -= F_LEN(cmd); 3469 CHECK_LENGTH(*len, 0); 3470 cmd += F_LEN(cmd); 3471 bzero(cmd, sizeof(*cmd)); 3472 return cmd; 3473 } 3474 3475 /* 3476 * Takes arguments and copies them into a comment 3477 */ 3478 static void 3479 fill_comment(ipfw_insn *cmd, char **av, int cblen) 3480 { 3481 int i, l; 3482 char *p = (char *)(cmd + 1); 3483 3484 cmd->opcode = O_NOP; 3485 cmd->len = (cmd->len & (F_NOT | F_OR)); 3486 3487 /* Compute length of comment string. */ 3488 for (i = 0, l = 0; av[i] != NULL; i++) 3489 l += strlen(av[i]) + 1; 3490 if (l == 0) 3491 return; 3492 if (l > 84) 3493 errx(EX_DATAERR, 3494 "comment too long (max 80 chars)"); 3495 l = 1 + (l+3)/4; 3496 cmd->len = (cmd->len & (F_NOT | F_OR)) | l; 3497 CHECK_CMDLEN; 3498 3499 for (i = 0; av[i] != NULL; i++) { 3500 strcpy(p, av[i]); 3501 p += strlen(av[i]); 3502 *p++ = ' '; 3503 } 3504 *(--p) = '\0'; 3505 } 3506 3507 /* 3508 * A function to fill simple commands of size 1. 3509 * Existing flags are preserved. 3510 */ 3511 static void 3512 fill_cmd(ipfw_insn *cmd, enum ipfw_opcodes opcode, int flags, uint16_t arg) 3513 { 3514 cmd->opcode = opcode; 3515 cmd->len = ((cmd->len | flags) & (F_NOT | F_OR)) | 1; 3516 cmd->arg1 = arg; 3517 } 3518 3519 /* 3520 * Fetch and add the MAC address and type, with masks. This generates one or 3521 * two microinstructions, and returns the pointer to the last one. 3522 */ 3523 static ipfw_insn * 3524 add_mac(ipfw_insn *cmd, char *av[], int cblen) 3525 { 3526 ipfw_insn_mac *mac; 3527 3528 if ( ( av[0] == NULL ) || ( av[1] == NULL ) ) 3529 errx(EX_DATAERR, "MAC dst src"); 3530 3531 cmd->opcode = O_MACADDR2; 3532 cmd->len = (cmd->len & (F_NOT | F_OR)) | F_INSN_SIZE(ipfw_insn_mac); 3533 CHECK_CMDLEN; 3534 3535 mac = (ipfw_insn_mac *)cmd; 3536 get_mac_addr_mask(av[0], mac->addr, mac->mask); /* dst */ 3537 get_mac_addr_mask(av[1], &(mac->addr[ETHER_ADDR_LEN]), 3538 &(mac->mask[ETHER_ADDR_LEN])); /* src */ 3539 return cmd; 3540 } 3541 3542 static ipfw_insn * 3543 add_mactype(ipfw_insn *cmd, char *av, int cblen) 3544 { 3545 if (!av) 3546 errx(EX_DATAERR, "missing MAC type"); 3547 if (strcmp(av, "any") != 0) { /* we have a non-null type */ 3548 fill_newports((ipfw_insn_u16 *)cmd, av, IPPROTO_ETHERTYPE, 3549 cblen); 3550 cmd->opcode = O_MAC_TYPE; 3551 return cmd; 3552 } else 3553 return NULL; 3554 } 3555 3556 static ipfw_insn * 3557 add_proto0(ipfw_insn *cmd, char *av, u_char *protop) 3558 { 3559 struct protoent *pe; 3560 char *ep; 3561 int proto; 3562 3563 proto = strtol(av, &ep, 10); 3564 if (*ep != '\0' || proto <= 0) { 3565 if ((pe = getprotobyname(av)) == NULL) 3566 return NULL; 3567 proto = pe->p_proto; 3568 } 3569 3570 fill_cmd(cmd, O_PROTO, 0, proto); 3571 *protop = proto; 3572 return cmd; 3573 } 3574 3575 static ipfw_insn * 3576 add_proto(ipfw_insn *cmd, char *av, u_char *protop) 3577 { 3578 u_char proto = IPPROTO_IP; 3579 3580 if (_substrcmp(av, "all") == 0 || strcmp(av, "ip") == 0) 3581 ; /* do not set O_IP4 nor O_IP6 */ 3582 else if (strcmp(av, "ip4") == 0) 3583 /* explicit "just IPv4" rule */ 3584 fill_cmd(cmd, O_IP4, 0, 0); 3585 else if (strcmp(av, "ip6") == 0) { 3586 /* explicit "just IPv6" rule */ 3587 proto = IPPROTO_IPV6; 3588 fill_cmd(cmd, O_IP6, 0, 0); 3589 } else 3590 return add_proto0(cmd, av, protop); 3591 3592 *protop = proto; 3593 return cmd; 3594 } 3595 3596 static ipfw_insn * 3597 add_proto_compat(ipfw_insn *cmd, char *av, u_char *protop) 3598 { 3599 u_char proto = IPPROTO_IP; 3600 3601 if (_substrcmp(av, "all") == 0 || strcmp(av, "ip") == 0) 3602 ; /* do not set O_IP4 nor O_IP6 */ 3603 else if (strcmp(av, "ipv4") == 0 || strcmp(av, "ip4") == 0) 3604 /* explicit "just IPv4" rule */ 3605 fill_cmd(cmd, O_IP4, 0, 0); 3606 else if (strcmp(av, "ipv6") == 0 || strcmp(av, "ip6") == 0) { 3607 /* explicit "just IPv6" rule */ 3608 proto = IPPROTO_IPV6; 3609 fill_cmd(cmd, O_IP6, 0, 0); 3610 } else 3611 return add_proto0(cmd, av, protop); 3612 3613 *protop = proto; 3614 return cmd; 3615 } 3616 3617 static ipfw_insn * 3618 add_srcip(ipfw_insn *cmd, char *av, int cblen, struct tidx *tstate) 3619 { 3620 fill_ip((ipfw_insn_ip *)cmd, av, cblen, tstate); 3621 if (cmd->opcode == O_IP_DST_SET) /* set */ 3622 cmd->opcode = O_IP_SRC_SET; 3623 else if (cmd->opcode == O_IP_DST_LOOKUP) /* table */ 3624 cmd->opcode = O_IP_SRC_LOOKUP; 3625 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn)) /* me */ 3626 cmd->opcode = O_IP_SRC_ME; 3627 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_u32)) /* one IP */ 3628 cmd->opcode = O_IP_SRC; 3629 else /* addr/mask */ 3630 cmd->opcode = O_IP_SRC_MASK; 3631 return cmd; 3632 } 3633 3634 static ipfw_insn * 3635 add_dstip(ipfw_insn *cmd, char *av, int cblen, struct tidx *tstate) 3636 { 3637 fill_ip((ipfw_insn_ip *)cmd, av, cblen, tstate); 3638 if (cmd->opcode == O_IP_DST_SET) /* set */ 3639 ; 3640 else if (cmd->opcode == O_IP_DST_LOOKUP) /* table */ 3641 ; 3642 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn)) /* me */ 3643 cmd->opcode = O_IP_DST_ME; 3644 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_u32)) /* one IP */ 3645 cmd->opcode = O_IP_DST; 3646 else /* addr/mask */ 3647 cmd->opcode = O_IP_DST_MASK; 3648 return cmd; 3649 } 3650 3651 static struct _s_x f_reserved_keywords[] = { 3652 { "altq", TOK_OR }, 3653 { "//", TOK_OR }, 3654 { "diverted", TOK_OR }, 3655 { "dst-port", TOK_OR }, 3656 { "src-port", TOK_OR }, 3657 { "established", TOK_OR }, 3658 { "keep-state", TOK_OR }, 3659 { "frag", TOK_OR }, 3660 { "icmptypes", TOK_OR }, 3661 { "in", TOK_OR }, 3662 { "out", TOK_OR }, 3663 { "ip6", TOK_OR }, 3664 { "any", TOK_OR }, 3665 { "to", TOK_OR }, 3666 { "via", TOK_OR }, 3667 { "{", TOK_OR }, 3668 { NULL, 0 } /* terminator */ 3669 }; 3670 3671 static ipfw_insn * 3672 add_ports(ipfw_insn *cmd, char *av, u_char proto, int opcode, int cblen) 3673 { 3674 3675 if (match_token(f_reserved_keywords, av) != -1) 3676 return (NULL); 3677 3678 if (fill_newports((ipfw_insn_u16 *)cmd, av, proto, cblen)) { 3679 /* XXX todo: check that we have a protocol with ports */ 3680 cmd->opcode = opcode; 3681 return cmd; 3682 } 3683 return NULL; 3684 } 3685 3686 static ipfw_insn * 3687 add_src(ipfw_insn *cmd, char *av, u_char proto, int cblen, struct tidx *tstate) 3688 { 3689 struct in6_addr a; 3690 char *host, *ch, buf[INET6_ADDRSTRLEN]; 3691 ipfw_insn *ret = NULL; 3692 int len; 3693 3694 /* Copy first address in set if needed */ 3695 if ((ch = strpbrk(av, "/,")) != NULL) { 3696 len = ch - av; 3697 strlcpy(buf, av, sizeof(buf)); 3698 if (len < sizeof(buf)) 3699 buf[len] = '\0'; 3700 host = buf; 3701 } else 3702 host = av; 3703 3704 if (proto == IPPROTO_IPV6 || strcmp(av, "me6") == 0 || 3705 inet_pton(AF_INET6, host, &a) == 1) 3706 ret = add_srcip6(cmd, av, cblen, tstate); 3707 /* XXX: should check for IPv4, not !IPv6 */ 3708 if (ret == NULL && (proto == IPPROTO_IP || strcmp(av, "me") == 0 || 3709 inet_pton(AF_INET6, host, &a) != 1)) 3710 ret = add_srcip(cmd, av, cblen, tstate); 3711 if (ret == NULL && strcmp(av, "any") != 0) 3712 ret = cmd; 3713 3714 return ret; 3715 } 3716 3717 static ipfw_insn * 3718 add_dst(ipfw_insn *cmd, char *av, u_char proto, int cblen, struct tidx *tstate) 3719 { 3720 struct in6_addr a; 3721 char *host, *ch, buf[INET6_ADDRSTRLEN]; 3722 ipfw_insn *ret = NULL; 3723 int len; 3724 3725 /* Copy first address in set if needed */ 3726 if ((ch = strpbrk(av, "/,")) != NULL) { 3727 len = ch - av; 3728 strlcpy(buf, av, sizeof(buf)); 3729 if (len < sizeof(buf)) 3730 buf[len] = '\0'; 3731 host = buf; 3732 } else 3733 host = av; 3734 3735 if (proto == IPPROTO_IPV6 || strcmp(av, "me6") == 0 || 3736 inet_pton(AF_INET6, host, &a) == 1) 3737 ret = add_dstip6(cmd, av, cblen, tstate); 3738 /* XXX: should check for IPv4, not !IPv6 */ 3739 if (ret == NULL && (proto == IPPROTO_IP || strcmp(av, "me") == 0 || 3740 inet_pton(AF_INET6, host, &a) != 1)) 3741 ret = add_dstip(cmd, av, cblen, tstate); 3742 if (ret == NULL && strcmp(av, "any") != 0) 3743 ret = cmd; 3744 3745 return ret; 3746 } 3747 3748 /* 3749 * Parse arguments and assemble the microinstructions which make up a rule. 3750 * Rules are added into the 'rulebuf' and then copied in the correct order 3751 * into the actual rule. 3752 * 3753 * The syntax for a rule starts with the action, followed by 3754 * optional action parameters, and the various match patterns. 3755 * In the assembled microcode, the first opcode must be an O_PROBE_STATE 3756 * (generated if the rule includes a keep-state option), then the 3757 * various match patterns, log/altq actions, and the actual action. 3758 * 3759 */ 3760 void 3761 compile_rule(char *av[], uint32_t *rbuf, int *rbufsize, struct tidx *tstate) 3762 { 3763 /* 3764 * rules are added into the 'rulebuf' and then copied in 3765 * the correct order into the actual rule. 3766 * Some things that need to go out of order (prob, action etc.) 3767 * go into actbuf[]. 3768 */ 3769 static uint32_t actbuf[255], cmdbuf[255]; 3770 int rblen, ablen, cblen; 3771 3772 ipfw_insn *src, *dst, *cmd, *action, *prev=NULL; 3773 ipfw_insn *first_cmd; /* first match pattern */ 3774 3775 struct ip_fw_rule *rule; 3776 3777 /* 3778 * various flags used to record that we entered some fields. 3779 */ 3780 ipfw_insn *have_state = NULL; /* any state-related option */ 3781 int have_rstate = 0; 3782 ipfw_insn *have_log = NULL, *have_altq = NULL, *have_tag = NULL; 3783 ipfw_insn *have_skipcmd = NULL; 3784 size_t len; 3785 3786 int i; 3787 3788 int open_par = 0; /* open parenthesis ( */ 3789 3790 /* proto is here because it is used to fetch ports */ 3791 u_char proto = IPPROTO_IP; /* default protocol */ 3792 3793 double match_prob = 1; /* match probability, default is always match */ 3794 3795 bzero(actbuf, sizeof(actbuf)); /* actions go here */ 3796 bzero(cmdbuf, sizeof(cmdbuf)); 3797 bzero(rbuf, *rbufsize); 3798 3799 rule = (struct ip_fw_rule *)rbuf; 3800 cmd = (ipfw_insn *)cmdbuf; 3801 action = (ipfw_insn *)actbuf; 3802 3803 rblen = *rbufsize / sizeof(uint32_t); 3804 rblen -= sizeof(struct ip_fw_rule) / sizeof(uint32_t); 3805 ablen = sizeof(actbuf) / sizeof(actbuf[0]); 3806 cblen = sizeof(cmdbuf) / sizeof(cmdbuf[0]); 3807 cblen -= F_INSN_SIZE(ipfw_insn_u32) + 1; 3808 3809 #define CHECK_RBUFLEN(len) { CHECK_LENGTH(rblen, len); rblen -= len; } 3810 #define CHECK_ACTLEN CHECK_LENGTH(ablen, action->len) 3811 3812 av++; 3813 3814 /* [rule N] -- Rule number optional */ 3815 if (av[0] && isdigit(**av)) { 3816 rule->rulenum = atoi(*av); 3817 av++; 3818 } 3819 3820 /* [set N] -- set number (0..RESVD_SET), optional */ 3821 if (av[0] && av[1] && _substrcmp(*av, "set") == 0) { 3822 int set = strtoul(av[1], NULL, 10); 3823 if (set < 0 || set > RESVD_SET) 3824 errx(EX_DATAERR, "illegal set %s", av[1]); 3825 rule->set = set; 3826 tstate->set = set; 3827 av += 2; 3828 } 3829 3830 /* [prob D] -- match probability, optional */ 3831 if (av[0] && av[1] && _substrcmp(*av, "prob") == 0) { 3832 match_prob = strtod(av[1], NULL); 3833 3834 if (match_prob <= 0 || match_prob > 1) 3835 errx(EX_DATAERR, "illegal match prob. %s", av[1]); 3836 av += 2; 3837 } 3838 3839 /* action -- mandatory */ 3840 NEED1("missing action"); 3841 i = match_token(rule_actions, *av); 3842 av++; 3843 action->len = 1; /* default */ 3844 CHECK_ACTLEN; 3845 switch(i) { 3846 case TOK_CHECKSTATE: 3847 have_state = action; 3848 action->opcode = O_CHECK_STATE; 3849 if (*av == NULL || 3850 match_token(rule_options, *av) == TOK_COMMENT) { 3851 action->arg1 = pack_object(tstate, 3852 default_state_name, IPFW_TLV_STATE_NAME); 3853 break; 3854 } 3855 if (*av[0] == ':') { 3856 if (strcmp(*av + 1, "any") == 0) 3857 action->arg1 = 0; 3858 else if (state_check_name(*av + 1) == 0) 3859 action->arg1 = pack_object(tstate, *av + 1, 3860 IPFW_TLV_STATE_NAME); 3861 else 3862 errx(EX_DATAERR, "Invalid state name %s", 3863 *av); 3864 av++; 3865 break; 3866 } 3867 errx(EX_DATAERR, "Invalid state name %s", *av); 3868 break; 3869 3870 case TOK_ABORT: 3871 action->opcode = O_REJECT; 3872 action->arg1 = ICMP_REJECT_ABORT; 3873 break; 3874 3875 case TOK_ABORT6: 3876 action->opcode = O_UNREACH6; 3877 action->arg1 = ICMP6_UNREACH_ABORT; 3878 break; 3879 3880 case TOK_ACCEPT: 3881 action->opcode = O_ACCEPT; 3882 break; 3883 3884 case TOK_DENY: 3885 action->opcode = O_DENY; 3886 action->arg1 = 0; 3887 break; 3888 3889 case TOK_REJECT: 3890 action->opcode = O_REJECT; 3891 action->arg1 = ICMP_UNREACH_HOST; 3892 break; 3893 3894 case TOK_RESET: 3895 action->opcode = O_REJECT; 3896 action->arg1 = ICMP_REJECT_RST; 3897 break; 3898 3899 case TOK_RESET6: 3900 action->opcode = O_UNREACH6; 3901 action->arg1 = ICMP6_UNREACH_RST; 3902 break; 3903 3904 case TOK_UNREACH: 3905 action->opcode = O_REJECT; 3906 NEED1("missing reject code"); 3907 fill_reject_code(&action->arg1, *av); 3908 av++; 3909 break; 3910 3911 case TOK_UNREACH6: 3912 action->opcode = O_UNREACH6; 3913 NEED1("missing unreach code"); 3914 fill_unreach6_code(&action->arg1, *av); 3915 av++; 3916 break; 3917 3918 case TOK_COUNT: 3919 action->opcode = O_COUNT; 3920 break; 3921 3922 case TOK_NAT: 3923 action->opcode = O_NAT; 3924 action->len = F_INSN_SIZE(ipfw_insn_nat); 3925 CHECK_ACTLEN; 3926 if (*av != NULL && _substrcmp(*av, "global") == 0) { 3927 action->arg1 = IP_FW_NAT44_GLOBAL; 3928 av++; 3929 break; 3930 } else 3931 goto chkarg; 3932 case TOK_QUEUE: 3933 action->opcode = O_QUEUE; 3934 goto chkarg; 3935 case TOK_PIPE: 3936 action->opcode = O_PIPE; 3937 goto chkarg; 3938 case TOK_SKIPTO: 3939 action->opcode = O_SKIPTO; 3940 goto chkarg; 3941 case TOK_NETGRAPH: 3942 action->opcode = O_NETGRAPH; 3943 goto chkarg; 3944 case TOK_NGTEE: 3945 action->opcode = O_NGTEE; 3946 goto chkarg; 3947 case TOK_DIVERT: 3948 action->opcode = O_DIVERT; 3949 goto chkarg; 3950 case TOK_TEE: 3951 action->opcode = O_TEE; 3952 goto chkarg; 3953 case TOK_CALL: 3954 action->opcode = O_CALLRETURN; 3955 chkarg: 3956 if (!av[0]) 3957 errx(EX_USAGE, "missing argument for %s", *(av - 1)); 3958 if (isdigit(**av)) { 3959 action->arg1 = strtoul(*av, NULL, 10); 3960 if (action->arg1 <= 0 || action->arg1 >= IP_FW_TABLEARG) 3961 errx(EX_DATAERR, "illegal argument for %s", 3962 *(av - 1)); 3963 } else if (_substrcmp(*av, "tablearg") == 0) { 3964 action->arg1 = IP_FW_TARG; 3965 } else if (i == TOK_DIVERT || i == TOK_TEE) { 3966 struct servent *s; 3967 setservent(1); 3968 s = getservbyname(av[0], "divert"); 3969 if (s != NULL) 3970 action->arg1 = ntohs(s->s_port); 3971 else 3972 errx(EX_DATAERR, "illegal divert/tee port"); 3973 } else 3974 errx(EX_DATAERR, "illegal argument for %s", *(av - 1)); 3975 av++; 3976 break; 3977 3978 case TOK_FORWARD: { 3979 /* 3980 * Locate the address-port separator (':' or ','). 3981 * Could be one of the following: 3982 * hostname:port 3983 * IPv4 a.b.c.d,port 3984 * IPv4 a.b.c.d:port 3985 * IPv6 w:x:y::z,port 3986 * The ':' can only be used with hostname and IPv4 address. 3987 * XXX-BZ Should we also support [w:x:y::z]:port? 3988 */ 3989 struct sockaddr_storage result; 3990 struct addrinfo *res; 3991 char *s, *end; 3992 int family; 3993 u_short port_number; 3994 3995 NEED1("missing forward address[:port]"); 3996 3997 /* 3998 * locate the address-port separator (':' or ',') 3999 */ 4000 s = strchr(*av, ','); 4001 if (s == NULL) { 4002 /* Distinguish between IPv4:port and IPv6 cases. */ 4003 s = strchr(*av, ':'); 4004 if (s && strchr(s+1, ':')) 4005 s = NULL; /* no port */ 4006 } 4007 4008 port_number = 0; 4009 if (s != NULL) { 4010 /* Terminate host portion and set s to start of port. */ 4011 *(s++) = '\0'; 4012 i = strtoport(s, &end, 0 /* base */, 0 /* proto */); 4013 if (s == end) 4014 errx(EX_DATAERR, 4015 "illegal forwarding port ``%s''", s); 4016 port_number = (u_short)i; 4017 } 4018 4019 if (_substrcmp(*av, "tablearg") == 0) { 4020 family = PF_INET; 4021 ((struct sockaddr_in*)&result)->sin_addr.s_addr = 4022 INADDR_ANY; 4023 } else { 4024 /* 4025 * Resolve the host name or address to a family and a 4026 * network representation of the address. 4027 */ 4028 if (getaddrinfo(*av, NULL, NULL, &res)) 4029 errx(EX_DATAERR, NULL); 4030 /* Just use the first host in the answer. */ 4031 family = res->ai_family; 4032 memcpy(&result, res->ai_addr, res->ai_addrlen); 4033 freeaddrinfo(res); 4034 } 4035 4036 if (family == PF_INET) { 4037 ipfw_insn_sa *p = (ipfw_insn_sa *)action; 4038 4039 action->opcode = O_FORWARD_IP; 4040 action->len = F_INSN_SIZE(ipfw_insn_sa); 4041 CHECK_ACTLEN; 4042 4043 /* 4044 * In the kernel we assume AF_INET and use only 4045 * sin_port and sin_addr. Remember to set sin_len as 4046 * the routing code seems to use it too. 4047 */ 4048 p->sa.sin_len = sizeof(struct sockaddr_in); 4049 p->sa.sin_family = AF_INET; 4050 p->sa.sin_port = port_number; 4051 p->sa.sin_addr.s_addr = 4052 ((struct sockaddr_in *)&result)->sin_addr.s_addr; 4053 } else if (family == PF_INET6) { 4054 ipfw_insn_sa6 *p = (ipfw_insn_sa6 *)action; 4055 4056 action->opcode = O_FORWARD_IP6; 4057 action->len = F_INSN_SIZE(ipfw_insn_sa6); 4058 CHECK_ACTLEN; 4059 4060 p->sa.sin6_len = sizeof(struct sockaddr_in6); 4061 p->sa.sin6_family = AF_INET6; 4062 p->sa.sin6_port = port_number; 4063 p->sa.sin6_flowinfo = 0; 4064 p->sa.sin6_scope_id = 4065 ((struct sockaddr_in6 *)&result)->sin6_scope_id; 4066 bcopy(&((struct sockaddr_in6*)&result)->sin6_addr, 4067 &p->sa.sin6_addr, sizeof(p->sa.sin6_addr)); 4068 } else { 4069 errx(EX_DATAERR, "Invalid address family in forward action"); 4070 } 4071 av++; 4072 break; 4073 } 4074 case TOK_COMMENT: 4075 /* pretend it is a 'count' rule followed by the comment */ 4076 action->opcode = O_COUNT; 4077 av--; /* go back... */ 4078 break; 4079 4080 case TOK_SETFIB: 4081 { 4082 int numfibs; 4083 size_t intsize = sizeof(int); 4084 4085 action->opcode = O_SETFIB; 4086 NEED1("missing fib number"); 4087 if (_substrcmp(*av, "tablearg") == 0) { 4088 action->arg1 = IP_FW_TARG; 4089 } else { 4090 action->arg1 = strtoul(*av, NULL, 10); 4091 if (sysctlbyname("net.fibs", &numfibs, &intsize, 4092 NULL, 0) == -1) 4093 errx(EX_DATAERR, "fibs not suported.\n"); 4094 if (action->arg1 >= numfibs) /* Temporary */ 4095 errx(EX_DATAERR, "fib too large.\n"); 4096 /* Add high-order bit to fib to make room for tablearg*/ 4097 action->arg1 |= 0x8000; 4098 } 4099 av++; 4100 break; 4101 } 4102 4103 case TOK_SETDSCP: 4104 { 4105 int code; 4106 4107 action->opcode = O_SETDSCP; 4108 NEED1("missing DSCP code"); 4109 if (_substrcmp(*av, "tablearg") == 0) { 4110 action->arg1 = IP_FW_TARG; 4111 } else { 4112 if (isalpha(*av[0])) { 4113 if ((code = match_token(f_ipdscp, *av)) == -1) 4114 errx(EX_DATAERR, "Unknown DSCP code"); 4115 action->arg1 = code; 4116 } else 4117 action->arg1 = strtoul(*av, NULL, 10); 4118 /* 4119 * Add high-order bit to DSCP to make room 4120 * for tablearg 4121 */ 4122 action->arg1 |= 0x8000; 4123 } 4124 av++; 4125 break; 4126 } 4127 4128 case TOK_REASS: 4129 action->opcode = O_REASS; 4130 break; 4131 4132 case TOK_RETURN: 4133 fill_cmd(action, O_CALLRETURN, F_NOT, 0); 4134 break; 4135 4136 case TOK_TCPSETMSS: { 4137 u_long mss; 4138 uint16_t idx; 4139 4140 idx = pack_object(tstate, "tcp-setmss", IPFW_TLV_EACTION); 4141 if (idx == 0) 4142 errx(EX_DATAERR, "pack_object failed"); 4143 fill_cmd(action, O_EXTERNAL_ACTION, 0, idx); 4144 NEED1("Missing MSS value"); 4145 action = next_cmd(action, &ablen); 4146 action->len = 1; 4147 CHECK_ACTLEN; 4148 mss = strtoul(*av, NULL, 10); 4149 if (mss == 0 || mss > UINT16_MAX) 4150 errx(EX_USAGE, "invalid MSS value %s", *av); 4151 fill_cmd(action, O_EXTERNAL_DATA, 0, (uint16_t)mss); 4152 av++; 4153 break; 4154 } 4155 4156 default: 4157 av--; 4158 if (match_token(rule_eactions, *av) == -1) 4159 errx(EX_DATAERR, "invalid action %s\n", *av); 4160 /* 4161 * External actions support. 4162 * XXX: we support only syntax with instance name. 4163 * For known external actions (from rule_eactions list) 4164 * we can handle syntax directly. But with `eaction' 4165 * keyword we can use only `eaction <name> <instance>' 4166 * syntax. 4167 */ 4168 case TOK_EACTION: { 4169 uint16_t idx; 4170 4171 NEED1("Missing eaction name"); 4172 if (eaction_check_name(*av) != 0) 4173 errx(EX_DATAERR, "Invalid eaction name %s", *av); 4174 idx = pack_object(tstate, *av, IPFW_TLV_EACTION); 4175 if (idx == 0) 4176 errx(EX_DATAERR, "pack_object failed"); 4177 fill_cmd(action, O_EXTERNAL_ACTION, 0, idx); 4178 av++; 4179 NEED1("Missing eaction instance name"); 4180 action = next_cmd(action, &ablen); 4181 action->len = 1; 4182 CHECK_ACTLEN; 4183 if (eaction_check_name(*av) != 0) 4184 errx(EX_DATAERR, "Invalid eaction instance name %s", 4185 *av); 4186 /* 4187 * External action instance object has TLV type depended 4188 * from the external action name object index. Since we 4189 * currently don't know this index, use zero as TLV type. 4190 */ 4191 idx = pack_object(tstate, *av, 0); 4192 if (idx == 0) 4193 errx(EX_DATAERR, "pack_object failed"); 4194 fill_cmd(action, O_EXTERNAL_INSTANCE, 0, idx); 4195 av++; 4196 } 4197 } 4198 action = next_cmd(action, &ablen); 4199 4200 /* 4201 * [altq queuename] -- altq tag, optional 4202 * [log [logamount N]] -- log, optional 4203 * 4204 * If they exist, it go first in the cmdbuf, but then it is 4205 * skipped in the copy section to the end of the buffer. 4206 */ 4207 while (av[0] != NULL && (i = match_token(rule_action_params, *av)) != -1) { 4208 av++; 4209 switch (i) { 4210 case TOK_LOG: 4211 { 4212 ipfw_insn_log *c = (ipfw_insn_log *)cmd; 4213 int l; 4214 4215 if (have_log) 4216 errx(EX_DATAERR, 4217 "log cannot be specified more than once"); 4218 have_log = (ipfw_insn *)c; 4219 cmd->len = F_INSN_SIZE(ipfw_insn_log); 4220 CHECK_CMDLEN; 4221 cmd->opcode = O_LOG; 4222 if (av[0] && _substrcmp(*av, "logamount") == 0) { 4223 av++; 4224 NEED1("logamount requires argument"); 4225 l = atoi(*av); 4226 if (l < 0) 4227 errx(EX_DATAERR, 4228 "logamount must be positive"); 4229 c->max_log = l; 4230 av++; 4231 } else { 4232 len = sizeof(c->max_log); 4233 if (sysctlbyname("net.inet.ip.fw.verbose_limit", 4234 &c->max_log, &len, NULL, 0) == -1) { 4235 if (co.test_only) { 4236 c->max_log = 0; 4237 break; 4238 } 4239 errx(1, "sysctlbyname(\"%s\")", 4240 "net.inet.ip.fw.verbose_limit"); 4241 } 4242 } 4243 } 4244 break; 4245 4246 #ifndef NO_ALTQ 4247 case TOK_ALTQ: 4248 { 4249 ipfw_insn_altq *a = (ipfw_insn_altq *)cmd; 4250 4251 NEED1("missing altq queue name"); 4252 if (have_altq) 4253 errx(EX_DATAERR, 4254 "altq cannot be specified more than once"); 4255 have_altq = (ipfw_insn *)a; 4256 cmd->len = F_INSN_SIZE(ipfw_insn_altq); 4257 CHECK_CMDLEN; 4258 cmd->opcode = O_ALTQ; 4259 a->qid = altq_name_to_qid(*av); 4260 av++; 4261 } 4262 break; 4263 #endif 4264 4265 case TOK_TAG: 4266 case TOK_UNTAG: { 4267 uint16_t tag; 4268 4269 if (have_tag) 4270 errx(EX_USAGE, "tag and untag cannot be " 4271 "specified more than once"); 4272 GET_UINT_ARG(tag, IPFW_ARG_MIN, IPFW_ARG_MAX, i, 4273 rule_action_params); 4274 have_tag = cmd; 4275 fill_cmd(cmd, O_TAG, (i == TOK_TAG) ? 0: F_NOT, tag); 4276 av++; 4277 break; 4278 } 4279 4280 default: 4281 abort(); 4282 } 4283 cmd = next_cmd(cmd, &cblen); 4284 } 4285 4286 if (have_state) { /* must be a check-state, we are done */ 4287 if (*av != NULL && 4288 match_token(rule_options, *av) == TOK_COMMENT) { 4289 /* check-state has a comment */ 4290 av++; 4291 fill_comment(cmd, av, cblen); 4292 cmd = next_cmd(cmd, &cblen); 4293 av[0] = NULL; 4294 } 4295 goto done; 4296 } 4297 4298 #define OR_START(target) \ 4299 if (av[0] && (*av[0] == '(' || *av[0] == '{')) { \ 4300 if (open_par) \ 4301 errx(EX_USAGE, "nested \"(\" not allowed\n"); \ 4302 prev = NULL; \ 4303 open_par = 1; \ 4304 if ( (av[0])[1] == '\0') { \ 4305 av++; \ 4306 } else \ 4307 (*av)++; \ 4308 } \ 4309 target: \ 4310 4311 4312 #define CLOSE_PAR \ 4313 if (open_par) { \ 4314 if (av[0] && ( \ 4315 strcmp(*av, ")") == 0 || \ 4316 strcmp(*av, "}") == 0)) { \ 4317 prev = NULL; \ 4318 open_par = 0; \ 4319 av++; \ 4320 } else \ 4321 errx(EX_USAGE, "missing \")\"\n"); \ 4322 } 4323 4324 #define NOT_BLOCK \ 4325 if (av[0] && _substrcmp(*av, "not") == 0) { \ 4326 if (cmd->len & F_NOT) \ 4327 errx(EX_USAGE, "double \"not\" not allowed\n"); \ 4328 cmd->len |= F_NOT; \ 4329 av++; \ 4330 } 4331 4332 #define OR_BLOCK(target) \ 4333 if (av[0] && _substrcmp(*av, "or") == 0) { \ 4334 if (prev == NULL || open_par == 0) \ 4335 errx(EX_DATAERR, "invalid OR block"); \ 4336 prev->len |= F_OR; \ 4337 av++; \ 4338 goto target; \ 4339 } \ 4340 CLOSE_PAR; 4341 4342 first_cmd = cmd; 4343 4344 #if 0 4345 /* 4346 * MAC addresses, optional. 4347 * If we have this, we skip the part "proto from src to dst" 4348 * and jump straight to the option parsing. 4349 */ 4350 NOT_BLOCK; 4351 NEED1("missing protocol"); 4352 if (_substrcmp(*av, "MAC") == 0 || 4353 _substrcmp(*av, "mac") == 0) { 4354 av++; /* the "MAC" keyword */ 4355 add_mac(cmd, av); /* exits in case of errors */ 4356 cmd = next_cmd(cmd); 4357 av += 2; /* dst-mac and src-mac */ 4358 NOT_BLOCK; 4359 NEED1("missing mac type"); 4360 if (add_mactype(cmd, av[0])) 4361 cmd = next_cmd(cmd); 4362 av++; /* any or mac-type */ 4363 goto read_options; 4364 } 4365 #endif 4366 4367 /* 4368 * protocol, mandatory 4369 */ 4370 OR_START(get_proto); 4371 NOT_BLOCK; 4372 NEED1("missing protocol"); 4373 if (add_proto_compat(cmd, *av, &proto)) { 4374 av++; 4375 if (F_LEN(cmd) != 0) { 4376 prev = cmd; 4377 cmd = next_cmd(cmd, &cblen); 4378 } 4379 } else if (first_cmd != cmd) { 4380 errx(EX_DATAERR, "invalid protocol ``%s''", *av); 4381 } else { 4382 rule->flags |= IPFW_RULE_JUSTOPTS; 4383 goto read_options; 4384 } 4385 OR_BLOCK(get_proto); 4386 4387 /* 4388 * "from", mandatory 4389 */ 4390 if ((av[0] == NULL) || _substrcmp(*av, "from") != 0) 4391 errx(EX_USAGE, "missing ``from''"); 4392 av++; 4393 4394 /* 4395 * source IP, mandatory 4396 */ 4397 OR_START(source_ip); 4398 NOT_BLOCK; /* optional "not" */ 4399 NEED1("missing source address"); 4400 if (add_src(cmd, *av, proto, cblen, tstate)) { 4401 av++; 4402 if (F_LEN(cmd) != 0) { /* ! any */ 4403 prev = cmd; 4404 cmd = next_cmd(cmd, &cblen); 4405 } 4406 } else 4407 errx(EX_USAGE, "bad source address %s", *av); 4408 OR_BLOCK(source_ip); 4409 4410 /* 4411 * source ports, optional 4412 */ 4413 NOT_BLOCK; /* optional "not" */ 4414 if ( av[0] != NULL ) { 4415 if (_substrcmp(*av, "any") == 0 || 4416 add_ports(cmd, *av, proto, O_IP_SRCPORT, cblen)) { 4417 av++; 4418 if (F_LEN(cmd) != 0) 4419 cmd = next_cmd(cmd, &cblen); 4420 } 4421 } 4422 4423 /* 4424 * "to", mandatory 4425 */ 4426 if ( (av[0] == NULL) || _substrcmp(*av, "to") != 0 ) 4427 errx(EX_USAGE, "missing ``to''"); 4428 av++; 4429 4430 /* 4431 * destination, mandatory 4432 */ 4433 OR_START(dest_ip); 4434 NOT_BLOCK; /* optional "not" */ 4435 NEED1("missing dst address"); 4436 if (add_dst(cmd, *av, proto, cblen, tstate)) { 4437 av++; 4438 if (F_LEN(cmd) != 0) { /* ! any */ 4439 prev = cmd; 4440 cmd = next_cmd(cmd, &cblen); 4441 } 4442 } else 4443 errx( EX_USAGE, "bad destination address %s", *av); 4444 OR_BLOCK(dest_ip); 4445 4446 /* 4447 * dest. ports, optional 4448 */ 4449 NOT_BLOCK; /* optional "not" */ 4450 if (av[0]) { 4451 if (_substrcmp(*av, "any") == 0 || 4452 add_ports(cmd, *av, proto, O_IP_DSTPORT, cblen)) { 4453 av++; 4454 if (F_LEN(cmd) != 0) 4455 cmd = next_cmd(cmd, &cblen); 4456 } 4457 } 4458 4459 read_options: 4460 prev = NULL; 4461 while ( av[0] != NULL ) { 4462 char *s; 4463 ipfw_insn_u32 *cmd32; /* alias for cmd */ 4464 4465 s = *av; 4466 cmd32 = (ipfw_insn_u32 *)cmd; 4467 4468 if (*s == '!') { /* alternate syntax for NOT */ 4469 if (cmd->len & F_NOT) 4470 errx(EX_USAGE, "double \"not\" not allowed\n"); 4471 cmd->len = F_NOT; 4472 s++; 4473 } 4474 i = match_token(rule_options, s); 4475 av++; 4476 switch(i) { 4477 case TOK_NOT: 4478 if (cmd->len & F_NOT) 4479 errx(EX_USAGE, "double \"not\" not allowed\n"); 4480 cmd->len = F_NOT; 4481 break; 4482 4483 case TOK_OR: 4484 if (open_par == 0 || prev == NULL) 4485 errx(EX_USAGE, "invalid \"or\" block\n"); 4486 prev->len |= F_OR; 4487 break; 4488 4489 case TOK_STARTBRACE: 4490 if (open_par) 4491 errx(EX_USAGE, "+nested \"(\" not allowed\n"); 4492 open_par = 1; 4493 break; 4494 4495 case TOK_ENDBRACE: 4496 if (!open_par) 4497 errx(EX_USAGE, "+missing \")\"\n"); 4498 open_par = 0; 4499 prev = NULL; 4500 break; 4501 4502 case TOK_IN: 4503 fill_cmd(cmd, O_IN, 0, 0); 4504 break; 4505 4506 case TOK_OUT: 4507 cmd->len ^= F_NOT; /* toggle F_NOT */ 4508 fill_cmd(cmd, O_IN, 0, 0); 4509 break; 4510 4511 case TOK_DIVERTED: 4512 fill_cmd(cmd, O_DIVERTED, 0, 3); 4513 break; 4514 4515 case TOK_DIVERTEDLOOPBACK: 4516 fill_cmd(cmd, O_DIVERTED, 0, 1); 4517 break; 4518 4519 case TOK_DIVERTEDOUTPUT: 4520 fill_cmd(cmd, O_DIVERTED, 0, 2); 4521 break; 4522 4523 case TOK_FRAG: 4524 fill_cmd(cmd, O_FRAG, 0, 0); 4525 break; 4526 4527 case TOK_LAYER2: 4528 fill_cmd(cmd, O_LAYER2, 0, 0); 4529 break; 4530 4531 case TOK_XMIT: 4532 case TOK_RECV: 4533 case TOK_VIA: 4534 NEED1("recv, xmit, via require interface name" 4535 " or address"); 4536 fill_iface((ipfw_insn_if *)cmd, av[0], cblen, tstate); 4537 av++; 4538 if (F_LEN(cmd) == 0) /* not a valid address */ 4539 break; 4540 if (i == TOK_XMIT) 4541 cmd->opcode = O_XMIT; 4542 else if (i == TOK_RECV) 4543 cmd->opcode = O_RECV; 4544 else if (i == TOK_VIA) 4545 cmd->opcode = O_VIA; 4546 break; 4547 4548 case TOK_ICMPTYPES: 4549 NEED1("icmptypes requires list of types"); 4550 fill_icmptypes((ipfw_insn_u32 *)cmd, *av); 4551 av++; 4552 break; 4553 4554 case TOK_ICMP6TYPES: 4555 NEED1("icmptypes requires list of types"); 4556 fill_icmp6types((ipfw_insn_icmp6 *)cmd, *av, cblen); 4557 av++; 4558 break; 4559 4560 case TOK_IPTTL: 4561 NEED1("ipttl requires TTL"); 4562 if (strpbrk(*av, "-,")) { 4563 if (!add_ports(cmd, *av, 0, O_IPTTL, cblen)) 4564 errx(EX_DATAERR, "invalid ipttl %s", *av); 4565 } else 4566 fill_cmd(cmd, O_IPTTL, 0, strtoul(*av, NULL, 0)); 4567 av++; 4568 break; 4569 4570 case TOK_IPID: 4571 NEED1("ipid requires id"); 4572 if (strpbrk(*av, "-,")) { 4573 if (!add_ports(cmd, *av, 0, O_IPID, cblen)) 4574 errx(EX_DATAERR, "invalid ipid %s", *av); 4575 } else 4576 fill_cmd(cmd, O_IPID, 0, strtoul(*av, NULL, 0)); 4577 av++; 4578 break; 4579 4580 case TOK_IPLEN: 4581 NEED1("iplen requires length"); 4582 if (strpbrk(*av, "-,")) { 4583 if (!add_ports(cmd, *av, 0, O_IPLEN, cblen)) 4584 errx(EX_DATAERR, "invalid ip len %s", *av); 4585 } else 4586 fill_cmd(cmd, O_IPLEN, 0, strtoul(*av, NULL, 0)); 4587 av++; 4588 break; 4589 4590 case TOK_IPVER: 4591 NEED1("ipver requires version"); 4592 fill_cmd(cmd, O_IPVER, 0, strtoul(*av, NULL, 0)); 4593 av++; 4594 break; 4595 4596 case TOK_IPPRECEDENCE: 4597 NEED1("ipprecedence requires value"); 4598 fill_cmd(cmd, O_IPPRECEDENCE, 0, 4599 (strtoul(*av, NULL, 0) & 7) << 5); 4600 av++; 4601 break; 4602 4603 case TOK_DSCP: 4604 NEED1("missing DSCP code"); 4605 fill_dscp(cmd, *av, cblen); 4606 av++; 4607 break; 4608 4609 case TOK_IPOPTS: 4610 NEED1("missing argument for ipoptions"); 4611 fill_flags_cmd(cmd, O_IPOPT, f_ipopts, *av); 4612 av++; 4613 break; 4614 4615 case TOK_IPTOS: 4616 NEED1("missing argument for iptos"); 4617 fill_flags_cmd(cmd, O_IPTOS, f_iptos, *av); 4618 av++; 4619 break; 4620 4621 case TOK_UID: 4622 NEED1("uid requires argument"); 4623 { 4624 char *end; 4625 uid_t uid; 4626 struct passwd *pwd; 4627 4628 cmd->opcode = O_UID; 4629 uid = strtoul(*av, &end, 0); 4630 pwd = (*end == '\0') ? getpwuid(uid) : getpwnam(*av); 4631 if (pwd == NULL) 4632 errx(EX_DATAERR, "uid \"%s\" nonexistent", *av); 4633 cmd32->d[0] = pwd->pw_uid; 4634 cmd->len |= F_INSN_SIZE(ipfw_insn_u32); 4635 av++; 4636 } 4637 break; 4638 4639 case TOK_GID: 4640 NEED1("gid requires argument"); 4641 { 4642 char *end; 4643 gid_t gid; 4644 struct group *grp; 4645 4646 cmd->opcode = O_GID; 4647 gid = strtoul(*av, &end, 0); 4648 grp = (*end == '\0') ? getgrgid(gid) : getgrnam(*av); 4649 if (grp == NULL) 4650 errx(EX_DATAERR, "gid \"%s\" nonexistent", *av); 4651 cmd32->d[0] = grp->gr_gid; 4652 cmd->len |= F_INSN_SIZE(ipfw_insn_u32); 4653 av++; 4654 } 4655 break; 4656 4657 case TOK_JAIL: 4658 NEED1("jail requires argument"); 4659 { 4660 int jid; 4661 4662 cmd->opcode = O_JAIL; 4663 jid = jail_getid(*av); 4664 if (jid < 0) 4665 errx(EX_DATAERR, "%s", jail_errmsg); 4666 cmd32->d[0] = (uint32_t)jid; 4667 cmd->len |= F_INSN_SIZE(ipfw_insn_u32); 4668 av++; 4669 } 4670 break; 4671 4672 case TOK_ESTAB: 4673 fill_cmd(cmd, O_ESTAB, 0, 0); 4674 break; 4675 4676 case TOK_SETUP: 4677 fill_cmd(cmd, O_TCPFLAGS, 0, 4678 (TH_SYN) | ( (TH_ACK) & 0xff) <<8 ); 4679 break; 4680 4681 case TOK_TCPDATALEN: 4682 NEED1("tcpdatalen requires length"); 4683 if (strpbrk(*av, "-,")) { 4684 if (!add_ports(cmd, *av, 0, O_TCPDATALEN, cblen)) 4685 errx(EX_DATAERR, "invalid tcpdata len %s", *av); 4686 } else 4687 fill_cmd(cmd, O_TCPDATALEN, 0, 4688 strtoul(*av, NULL, 0)); 4689 av++; 4690 break; 4691 4692 case TOK_TCPOPTS: 4693 NEED1("missing argument for tcpoptions"); 4694 fill_flags_cmd(cmd, O_TCPOPTS, f_tcpopts, *av); 4695 av++; 4696 break; 4697 4698 case TOK_TCPSEQ: 4699 case TOK_TCPACK: 4700 NEED1("tcpseq/tcpack requires argument"); 4701 cmd->len = F_INSN_SIZE(ipfw_insn_u32); 4702 cmd->opcode = (i == TOK_TCPSEQ) ? O_TCPSEQ : O_TCPACK; 4703 cmd32->d[0] = htonl(strtoul(*av, NULL, 0)); 4704 av++; 4705 break; 4706 4707 case TOK_TCPWIN: 4708 NEED1("tcpwin requires length"); 4709 if (strpbrk(*av, "-,")) { 4710 if (!add_ports(cmd, *av, 0, O_TCPWIN, cblen)) 4711 errx(EX_DATAERR, "invalid tcpwin len %s", *av); 4712 } else 4713 fill_cmd(cmd, O_TCPWIN, 0, 4714 strtoul(*av, NULL, 0)); 4715 av++; 4716 break; 4717 4718 case TOK_TCPFLAGS: 4719 NEED1("missing argument for tcpflags"); 4720 cmd->opcode = O_TCPFLAGS; 4721 fill_flags_cmd(cmd, O_TCPFLAGS, f_tcpflags, *av); 4722 av++; 4723 break; 4724 4725 case TOK_KEEPSTATE: 4726 case TOK_RECORDSTATE: { 4727 uint16_t uidx; 4728 4729 if (open_par) 4730 errx(EX_USAGE, "keep-state or record-state cannot be part " 4731 "of an or block"); 4732 if (have_state) 4733 errx(EX_USAGE, "only one of keep-state, record-state, " 4734 " limit and set-limit is allowed"); 4735 if (*av != NULL && *av[0] == ':') { 4736 if (state_check_name(*av + 1) != 0) 4737 errx(EX_DATAERR, 4738 "Invalid state name %s", *av); 4739 uidx = pack_object(tstate, *av + 1, 4740 IPFW_TLV_STATE_NAME); 4741 av++; 4742 } else 4743 uidx = pack_object(tstate, default_state_name, 4744 IPFW_TLV_STATE_NAME); 4745 have_state = cmd; 4746 have_rstate = i == TOK_RECORDSTATE; 4747 fill_cmd(cmd, O_KEEP_STATE, 0, uidx); 4748 break; 4749 } 4750 4751 case TOK_LIMIT: 4752 case TOK_SETLIMIT: { 4753 ipfw_insn_limit *c = (ipfw_insn_limit *)cmd; 4754 int val; 4755 4756 if (open_par) 4757 errx(EX_USAGE, 4758 "limit or set-limit cannot be part of an or block"); 4759 if (have_state) 4760 errx(EX_USAGE, "only one of keep-state, record-state, " 4761 " limit and set-limit is allowed"); 4762 have_state = cmd; 4763 have_rstate = i == TOK_SETLIMIT; 4764 4765 cmd->len = F_INSN_SIZE(ipfw_insn_limit); 4766 CHECK_CMDLEN; 4767 cmd->opcode = O_LIMIT; 4768 c->limit_mask = c->conn_limit = 0; 4769 4770 while ( av[0] != NULL ) { 4771 if ((val = match_token(limit_masks, *av)) <= 0) 4772 break; 4773 c->limit_mask |= val; 4774 av++; 4775 } 4776 4777 if (c->limit_mask == 0) 4778 errx(EX_USAGE, "limit: missing limit mask"); 4779 4780 GET_UINT_ARG(c->conn_limit, IPFW_ARG_MIN, IPFW_ARG_MAX, 4781 TOK_LIMIT, rule_options); 4782 av++; 4783 4784 if (*av != NULL && *av[0] == ':') { 4785 if (state_check_name(*av + 1) != 0) 4786 errx(EX_DATAERR, 4787 "Invalid state name %s", *av); 4788 cmd->arg1 = pack_object(tstate, *av + 1, 4789 IPFW_TLV_STATE_NAME); 4790 av++; 4791 } else 4792 cmd->arg1 = pack_object(tstate, 4793 default_state_name, IPFW_TLV_STATE_NAME); 4794 break; 4795 } 4796 4797 case TOK_PROTO: 4798 NEED1("missing protocol"); 4799 if (add_proto(cmd, *av, &proto)) { 4800 av++; 4801 } else 4802 errx(EX_DATAERR, "invalid protocol ``%s''", 4803 *av); 4804 break; 4805 4806 case TOK_SRCIP: 4807 NEED1("missing source IP"); 4808 if (add_srcip(cmd, *av, cblen, tstate)) { 4809 av++; 4810 } 4811 break; 4812 4813 case TOK_DSTIP: 4814 NEED1("missing destination IP"); 4815 if (add_dstip(cmd, *av, cblen, tstate)) { 4816 av++; 4817 } 4818 break; 4819 4820 case TOK_SRCIP6: 4821 NEED1("missing source IP6"); 4822 if (add_srcip6(cmd, *av, cblen, tstate)) { 4823 av++; 4824 } 4825 break; 4826 4827 case TOK_DSTIP6: 4828 NEED1("missing destination IP6"); 4829 if (add_dstip6(cmd, *av, cblen, tstate)) { 4830 av++; 4831 } 4832 break; 4833 4834 case TOK_SRCPORT: 4835 NEED1("missing source port"); 4836 if (_substrcmp(*av, "any") == 0 || 4837 add_ports(cmd, *av, proto, O_IP_SRCPORT, cblen)) { 4838 av++; 4839 } else 4840 errx(EX_DATAERR, "invalid source port %s", *av); 4841 break; 4842 4843 case TOK_DSTPORT: 4844 NEED1("missing destination port"); 4845 if (_substrcmp(*av, "any") == 0 || 4846 add_ports(cmd, *av, proto, O_IP_DSTPORT, cblen)) { 4847 av++; 4848 } else 4849 errx(EX_DATAERR, "invalid destination port %s", 4850 *av); 4851 break; 4852 4853 case TOK_MAC: 4854 if (add_mac(cmd, av, cblen)) 4855 av += 2; 4856 break; 4857 4858 case TOK_MACTYPE: 4859 NEED1("missing mac type"); 4860 if (!add_mactype(cmd, *av, cblen)) 4861 errx(EX_DATAERR, "invalid mac type %s", *av); 4862 av++; 4863 break; 4864 4865 case TOK_VERREVPATH: 4866 fill_cmd(cmd, O_VERREVPATH, 0, 0); 4867 break; 4868 4869 case TOK_VERSRCREACH: 4870 fill_cmd(cmd, O_VERSRCREACH, 0, 0); 4871 break; 4872 4873 case TOK_ANTISPOOF: 4874 fill_cmd(cmd, O_ANTISPOOF, 0, 0); 4875 break; 4876 4877 case TOK_IPSEC: 4878 fill_cmd(cmd, O_IPSEC, 0, 0); 4879 break; 4880 4881 case TOK_IPV6: 4882 fill_cmd(cmd, O_IP6, 0, 0); 4883 break; 4884 4885 case TOK_IPV4: 4886 fill_cmd(cmd, O_IP4, 0, 0); 4887 break; 4888 4889 case TOK_EXT6HDR: 4890 fill_ext6hdr( cmd, *av ); 4891 av++; 4892 break; 4893 4894 case TOK_FLOWID: 4895 if (proto != IPPROTO_IPV6 ) 4896 errx( EX_USAGE, "flow-id filter is active " 4897 "only for ipv6 protocol\n"); 4898 fill_flow6( (ipfw_insn_u32 *) cmd, *av, cblen); 4899 av++; 4900 break; 4901 4902 case TOK_COMMENT: 4903 fill_comment(cmd, av, cblen); 4904 av[0]=NULL; 4905 break; 4906 4907 case TOK_TAGGED: 4908 if (av[0] && strpbrk(*av, "-,")) { 4909 if (!add_ports(cmd, *av, 0, O_TAGGED, cblen)) 4910 errx(EX_DATAERR, "tagged: invalid tag" 4911 " list: %s", *av); 4912 } 4913 else { 4914 uint16_t tag; 4915 4916 GET_UINT_ARG(tag, IPFW_ARG_MIN, IPFW_ARG_MAX, 4917 TOK_TAGGED, rule_options); 4918 fill_cmd(cmd, O_TAGGED, 0, tag); 4919 } 4920 av++; 4921 break; 4922 4923 case TOK_FIB: 4924 NEED1("fib requires fib number"); 4925 fill_cmd(cmd, O_FIB, 0, strtoul(*av, NULL, 0)); 4926 av++; 4927 break; 4928 case TOK_SOCKARG: 4929 fill_cmd(cmd, O_SOCKARG, 0, 0); 4930 break; 4931 4932 case TOK_LOOKUP: { 4933 ipfw_insn_u32 *c = (ipfw_insn_u32 *)cmd; 4934 int j; 4935 4936 if (!av[0] || !av[1]) 4937 errx(EX_USAGE, "format: lookup argument tablenum"); 4938 cmd->opcode = O_IP_DST_LOOKUP; 4939 cmd->len |= F_INSN_SIZE(ipfw_insn) + 2; 4940 i = match_token(rule_options, *av); 4941 for (j = 0; lookup_key[j] >= 0 ; j++) { 4942 if (i == lookup_key[j]) 4943 break; 4944 } 4945 if (lookup_key[j] <= 0) 4946 errx(EX_USAGE, "format: cannot lookup on %s", *av); 4947 __PAST_END(c->d, 1) = j; // i converted to option 4948 av++; 4949 4950 if ((j = pack_table(tstate, *av)) == 0) 4951 errx(EX_DATAERR, "Invalid table name: %s", *av); 4952 4953 cmd->arg1 = j; 4954 av++; 4955 } 4956 break; 4957 case TOK_FLOW: 4958 NEED1("missing table name"); 4959 if (strncmp(*av, "table(", 6) != 0) 4960 errx(EX_DATAERR, 4961 "enclose table name into \"table()\""); 4962 fill_table(cmd, *av, O_IP_FLOW_LOOKUP, tstate); 4963 av++; 4964 break; 4965 4966 case TOK_SKIPACTION: 4967 if (have_skipcmd) 4968 errx(EX_USAGE, "only one defer-action " 4969 "is allowed"); 4970 have_skipcmd = cmd; 4971 fill_cmd(cmd, O_SKIP_ACTION, 0, 0); 4972 break; 4973 4974 default: 4975 errx(EX_USAGE, "unrecognised option [%d] %s\n", i, s); 4976 } 4977 if (F_LEN(cmd) > 0) { /* prepare to advance */ 4978 prev = cmd; 4979 cmd = next_cmd(cmd, &cblen); 4980 } 4981 } 4982 4983 done: 4984 4985 if (!have_state && have_skipcmd) 4986 warnx("Rule contains \"defer-immediate-action\" " 4987 "and doesn't contain any state-related options."); 4988 4989 /* 4990 * Now copy stuff into the rule. 4991 * If we have a keep-state option, the first instruction 4992 * must be a PROBE_STATE (which is generated here). 4993 * If we have a LOG option, it was stored as the first command, 4994 * and now must be moved to the top of the action part. 4995 */ 4996 dst = (ipfw_insn *)rule->cmd; 4997 4998 /* 4999 * First thing to write into the command stream is the match probability. 5000 */ 5001 if (match_prob != 1) { /* 1 means always match */ 5002 dst->opcode = O_PROB; 5003 dst->len = 2; 5004 *((int32_t *)(dst+1)) = (int32_t)(match_prob * 0x7fffffff); 5005 dst += dst->len; 5006 } 5007 5008 /* 5009 * generate O_PROBE_STATE if necessary 5010 */ 5011 if (have_state && have_state->opcode != O_CHECK_STATE && !have_rstate) { 5012 fill_cmd(dst, O_PROBE_STATE, 0, have_state->arg1); 5013 dst = next_cmd(dst, &rblen); 5014 } 5015 5016 /* 5017 * copy all commands but O_LOG, O_KEEP_STATE, O_LIMIT, O_ALTQ, O_TAG, 5018 * O_SKIP_ACTION 5019 */ 5020 for (src = (ipfw_insn *)cmdbuf; src != cmd; src += i) { 5021 i = F_LEN(src); 5022 CHECK_RBUFLEN(i); 5023 5024 switch (src->opcode) { 5025 case O_LOG: 5026 case O_KEEP_STATE: 5027 case O_LIMIT: 5028 case O_ALTQ: 5029 case O_TAG: 5030 case O_SKIP_ACTION: 5031 break; 5032 default: 5033 bcopy(src, dst, i * sizeof(uint32_t)); 5034 dst += i; 5035 } 5036 } 5037 5038 /* 5039 * put back the have_state command as last opcode 5040 */ 5041 if (have_state && have_state->opcode != O_CHECK_STATE) { 5042 i = F_LEN(have_state); 5043 CHECK_RBUFLEN(i); 5044 bcopy(have_state, dst, i * sizeof(uint32_t)); 5045 dst += i; 5046 } 5047 5048 /* 5049 * put back the have_skipcmd command as very last opcode 5050 */ 5051 if (have_skipcmd) { 5052 i = F_LEN(have_skipcmd); 5053 CHECK_RBUFLEN(i); 5054 bcopy(have_skipcmd, dst, i * sizeof(uint32_t)); 5055 dst += i; 5056 } 5057 5058 /* 5059 * start action section 5060 */ 5061 rule->act_ofs = dst - rule->cmd; 5062 5063 /* put back O_LOG, O_ALTQ, O_TAG if necessary */ 5064 if (have_log) { 5065 i = F_LEN(have_log); 5066 CHECK_RBUFLEN(i); 5067 bcopy(have_log, dst, i * sizeof(uint32_t)); 5068 dst += i; 5069 } 5070 if (have_altq) { 5071 i = F_LEN(have_altq); 5072 CHECK_RBUFLEN(i); 5073 bcopy(have_altq, dst, i * sizeof(uint32_t)); 5074 dst += i; 5075 } 5076 if (have_tag) { 5077 i = F_LEN(have_tag); 5078 CHECK_RBUFLEN(i); 5079 bcopy(have_tag, dst, i * sizeof(uint32_t)); 5080 dst += i; 5081 } 5082 5083 /* 5084 * copy all other actions 5085 */ 5086 for (src = (ipfw_insn *)actbuf; src != action; src += i) { 5087 i = F_LEN(src); 5088 CHECK_RBUFLEN(i); 5089 bcopy(src, dst, i * sizeof(uint32_t)); 5090 dst += i; 5091 } 5092 5093 rule->cmd_len = (uint32_t *)dst - (uint32_t *)(rule->cmd); 5094 *rbufsize = (char *)dst - (char *)rule; 5095 } 5096 5097 static int 5098 compare_ntlv(const void *_a, const void *_b) 5099 { 5100 ipfw_obj_ntlv *a, *b; 5101 5102 a = (ipfw_obj_ntlv *)_a; 5103 b = (ipfw_obj_ntlv *)_b; 5104 5105 if (a->set < b->set) 5106 return (-1); 5107 else if (a->set > b->set) 5108 return (1); 5109 5110 if (a->idx < b->idx) 5111 return (-1); 5112 else if (a->idx > b->idx) 5113 return (1); 5114 5115 if (a->head.type < b->head.type) 5116 return (-1); 5117 else if (a->head.type > b->head.type) 5118 return (1); 5119 5120 return (0); 5121 } 5122 5123 /* 5124 * Provide kernel with sorted list of referenced objects 5125 */ 5126 static void 5127 object_sort_ctlv(ipfw_obj_ctlv *ctlv) 5128 { 5129 5130 qsort(ctlv + 1, ctlv->count, ctlv->objsize, compare_ntlv); 5131 } 5132 5133 struct object_kt { 5134 uint16_t uidx; 5135 uint16_t type; 5136 }; 5137 static int 5138 compare_object_kntlv(const void *k, const void *v) 5139 { 5140 ipfw_obj_ntlv *ntlv; 5141 struct object_kt key; 5142 5143 key = *((struct object_kt *)k); 5144 ntlv = (ipfw_obj_ntlv *)v; 5145 5146 if (key.uidx < ntlv->idx) 5147 return (-1); 5148 else if (key.uidx > ntlv->idx) 5149 return (1); 5150 5151 if (key.type < ntlv->head.type) 5152 return (-1); 5153 else if (key.type > ntlv->head.type) 5154 return (1); 5155 5156 return (0); 5157 } 5158 5159 /* 5160 * Finds object name in @ctlv by @idx and @type. 5161 * Uses the following facts: 5162 * 1) All TLVs are the same size 5163 * 2) Kernel implementation provides already sorted list. 5164 * 5165 * Returns table name or NULL. 5166 */ 5167 static char * 5168 object_search_ctlv(ipfw_obj_ctlv *ctlv, uint16_t idx, uint16_t type) 5169 { 5170 ipfw_obj_ntlv *ntlv; 5171 struct object_kt key; 5172 5173 key.uidx = idx; 5174 key.type = type; 5175 5176 ntlv = bsearch(&key, (ctlv + 1), ctlv->count, ctlv->objsize, 5177 compare_object_kntlv); 5178 5179 if (ntlv != NULL) 5180 return (ntlv->name); 5181 5182 return (NULL); 5183 } 5184 5185 static char * 5186 table_search_ctlv(ipfw_obj_ctlv *ctlv, uint16_t idx) 5187 { 5188 5189 return (object_search_ctlv(ctlv, idx, IPFW_TLV_TBL_NAME)); 5190 } 5191 5192 /* 5193 * Adds one or more rules to ipfw chain. 5194 * Data layout: 5195 * Request: 5196 * [ 5197 * ip_fw3_opheader 5198 * [ ipfw_obj_ctlv(IPFW_TLV_TBL_LIST) ipfw_obj_ntlv x N ] (optional *1) 5199 * [ ipfw_obj_ctlv(IPFW_TLV_RULE_LIST) [ ip_fw_rule ip_fw_insn ] x N ] (*2) (*3) 5200 * ] 5201 * Reply: 5202 * [ 5203 * ip_fw3_opheader 5204 * [ ipfw_obj_ctlv(IPFW_TLV_TBL_LIST) ipfw_obj_ntlv x N ] (optional) 5205 * [ ipfw_obj_ctlv(IPFW_TLV_RULE_LIST) [ ip_fw_rule ip_fw_insn ] x N ] 5206 * ] 5207 * 5208 * Rules in reply are modified to store their actual ruleset number. 5209 * 5210 * (*1) TLVs inside IPFW_TLV_TBL_LIST needs to be sorted ascending 5211 * according to their idx field and there has to be no duplicates. 5212 * (*2) Numbered rules inside IPFW_TLV_RULE_LIST needs to be sorted ascending. 5213 * (*3) Each ip_fw structure needs to be aligned to u64 boundary. 5214 */ 5215 void 5216 ipfw_add(char *av[]) 5217 { 5218 uint32_t rulebuf[1024]; 5219 int rbufsize, default_off, tlen, rlen; 5220 size_t sz; 5221 struct tidx ts; 5222 struct ip_fw_rule *rule; 5223 caddr_t tbuf; 5224 ip_fw3_opheader *op3; 5225 ipfw_obj_ctlv *ctlv, *tstate; 5226 5227 rbufsize = sizeof(rulebuf); 5228 memset(rulebuf, 0, rbufsize); 5229 memset(&ts, 0, sizeof(ts)); 5230 5231 /* Optimize case with no tables */ 5232 default_off = sizeof(ipfw_obj_ctlv) + sizeof(ip_fw3_opheader); 5233 op3 = (ip_fw3_opheader *)rulebuf; 5234 ctlv = (ipfw_obj_ctlv *)(op3 + 1); 5235 rule = (struct ip_fw_rule *)(ctlv + 1); 5236 rbufsize -= default_off; 5237 5238 compile_rule(av, (uint32_t *)rule, &rbufsize, &ts); 5239 /* Align rule size to u64 boundary */ 5240 rlen = roundup2(rbufsize, sizeof(uint64_t)); 5241 5242 tbuf = NULL; 5243 sz = 0; 5244 tstate = NULL; 5245 if (ts.count != 0) { 5246 /* Some tables. We have to alloc more data */ 5247 tlen = ts.count * sizeof(ipfw_obj_ntlv); 5248 sz = default_off + sizeof(ipfw_obj_ctlv) + tlen + rlen; 5249 5250 if ((tbuf = calloc(1, sz)) == NULL) 5251 err(EX_UNAVAILABLE, "malloc() failed for IP_FW_ADD"); 5252 op3 = (ip_fw3_opheader *)tbuf; 5253 /* Tables first */ 5254 ctlv = (ipfw_obj_ctlv *)(op3 + 1); 5255 ctlv->head.type = IPFW_TLV_TBLNAME_LIST; 5256 ctlv->head.length = sizeof(ipfw_obj_ctlv) + tlen; 5257 ctlv->count = ts.count; 5258 ctlv->objsize = sizeof(ipfw_obj_ntlv); 5259 memcpy(ctlv + 1, ts.idx, tlen); 5260 object_sort_ctlv(ctlv); 5261 tstate = ctlv; 5262 /* Rule next */ 5263 ctlv = (ipfw_obj_ctlv *)((caddr_t)ctlv + ctlv->head.length); 5264 ctlv->head.type = IPFW_TLV_RULE_LIST; 5265 ctlv->head.length = sizeof(ipfw_obj_ctlv) + rlen; 5266 ctlv->count = 1; 5267 memcpy(ctlv + 1, rule, rbufsize); 5268 } else { 5269 /* Simply add header */ 5270 sz = rlen + default_off; 5271 memset(ctlv, 0, sizeof(*ctlv)); 5272 ctlv->head.type = IPFW_TLV_RULE_LIST; 5273 ctlv->head.length = sizeof(ipfw_obj_ctlv) + rlen; 5274 ctlv->count = 1; 5275 } 5276 5277 if (do_get3(IP_FW_XADD, op3, &sz) != 0) 5278 err(EX_UNAVAILABLE, "getsockopt(%s)", "IP_FW_XADD"); 5279 5280 if (!co.do_quiet) { 5281 struct format_opts sfo; 5282 struct buf_pr bp; 5283 memset(&sfo, 0, sizeof(sfo)); 5284 sfo.tstate = tstate; 5285 sfo.set_mask = (uint32_t)(-1); 5286 bp_alloc(&bp, 4096); 5287 show_static_rule(&co, &sfo, &bp, rule, NULL); 5288 printf("%s", bp.buf); 5289 bp_free(&bp); 5290 } 5291 5292 if (tbuf != NULL) 5293 free(tbuf); 5294 5295 if (ts.idx != NULL) 5296 free(ts.idx); 5297 } 5298 5299 /* 5300 * clear the counters or the log counters. 5301 * optname has the following values: 5302 * 0 (zero both counters and logging) 5303 * 1 (zero logging only) 5304 */ 5305 void 5306 ipfw_zero(int ac, char *av[], int optname) 5307 { 5308 ipfw_range_tlv rt; 5309 char const *errstr; 5310 char const *name = optname ? "RESETLOG" : "ZERO"; 5311 uint32_t arg; 5312 int failed = EX_OK; 5313 5314 optname = optname ? IP_FW_XRESETLOG : IP_FW_XZERO; 5315 av++; ac--; 5316 5317 if (ac == 0) { 5318 /* clear all entries */ 5319 memset(&rt, 0, sizeof(rt)); 5320 rt.flags = IPFW_RCFLAG_ALL; 5321 if (do_range_cmd(optname, &rt) < 0) 5322 err(EX_UNAVAILABLE, "setsockopt(IP_FW_X%s)", name); 5323 if (!co.do_quiet) 5324 printf("%s.\n", optname == IP_FW_XZERO ? 5325 "Accounting cleared":"Logging counts reset"); 5326 5327 return; 5328 } 5329 5330 while (ac) { 5331 /* Rule number */ 5332 if (isdigit(**av)) { 5333 arg = strtonum(*av, 0, 0xffff, &errstr); 5334 if (errstr) 5335 errx(EX_DATAERR, 5336 "invalid rule number %s\n", *av); 5337 memset(&rt, 0, sizeof(rt)); 5338 rt.start_rule = arg; 5339 rt.end_rule = arg; 5340 rt.flags |= IPFW_RCFLAG_RANGE; 5341 if (co.use_set != 0) { 5342 rt.set = co.use_set - 1; 5343 rt.flags |= IPFW_RCFLAG_SET; 5344 } 5345 if (do_range_cmd(optname, &rt) != 0) { 5346 warn("rule %u: setsockopt(IP_FW_X%s)", 5347 arg, name); 5348 failed = EX_UNAVAILABLE; 5349 } else if (rt.new_set == 0) { 5350 printf("Entry %d not found\n", arg); 5351 failed = EX_UNAVAILABLE; 5352 } else if (!co.do_quiet) 5353 printf("Entry %d %s.\n", arg, 5354 optname == IP_FW_XZERO ? 5355 "cleared" : "logging count reset"); 5356 } else { 5357 errx(EX_USAGE, "invalid rule number ``%s''", *av); 5358 } 5359 av++; ac--; 5360 } 5361 if (failed != EX_OK) 5362 exit(failed); 5363 } 5364 5365 void 5366 ipfw_flush(int force) 5367 { 5368 ipfw_range_tlv rt; 5369 5370 if (!force && !co.do_quiet) { /* need to ask user */ 5371 int c; 5372 5373 printf("Are you sure? [yn] "); 5374 fflush(stdout); 5375 do { 5376 c = toupper(getc(stdin)); 5377 while (c != '\n' && getc(stdin) != '\n') 5378 if (feof(stdin)) 5379 return; /* and do not flush */ 5380 } while (c != 'Y' && c != 'N'); 5381 printf("\n"); 5382 if (c == 'N') /* user said no */ 5383 return; 5384 } 5385 if (co.do_pipe) { 5386 dummynet_flush(); 5387 return; 5388 } 5389 /* `ipfw set N flush` - is the same that `ipfw delete set N` */ 5390 memset(&rt, 0, sizeof(rt)); 5391 if (co.use_set != 0) { 5392 rt.set = co.use_set - 1; 5393 rt.flags = IPFW_RCFLAG_SET; 5394 } else 5395 rt.flags = IPFW_RCFLAG_ALL; 5396 if (do_range_cmd(IP_FW_XDEL, &rt) != 0) 5397 err(EX_UNAVAILABLE, "setsockopt(IP_FW_XDEL)"); 5398 if (!co.do_quiet) 5399 printf("Flushed all %s.\n", co.do_pipe ? "pipes" : "rules"); 5400 } 5401 5402 static struct _s_x intcmds[] = { 5403 { "talist", TOK_TALIST }, 5404 { "iflist", TOK_IFLIST }, 5405 { "olist", TOK_OLIST }, 5406 { "vlist", TOK_VLIST }, 5407 { NULL, 0 } 5408 }; 5409 5410 static struct _s_x otypes[] = { 5411 { "EACTION", IPFW_TLV_EACTION }, 5412 { "DYNSTATE", IPFW_TLV_STATE_NAME }, 5413 { NULL, 0 } 5414 }; 5415 5416 static const char* 5417 lookup_eaction_name(ipfw_obj_ntlv *ntlv, int cnt, uint16_t type) 5418 { 5419 const char *name; 5420 int i; 5421 5422 name = NULL; 5423 for (i = 0; i < cnt; i++) { 5424 if (ntlv[i].head.type != IPFW_TLV_EACTION) 5425 continue; 5426 if (IPFW_TLV_EACTION_NAME(ntlv[i].idx) != type) 5427 continue; 5428 name = ntlv[i].name; 5429 break; 5430 } 5431 return (name); 5432 } 5433 5434 static void 5435 ipfw_list_objects(int ac, char *av[]) 5436 { 5437 ipfw_obj_lheader req, *olh; 5438 ipfw_obj_ntlv *ntlv; 5439 const char *name; 5440 size_t sz; 5441 int i; 5442 5443 memset(&req, 0, sizeof(req)); 5444 sz = sizeof(req); 5445 if (do_get3(IP_FW_DUMP_SRVOBJECTS, &req.opheader, &sz) != 0) 5446 if (errno != ENOMEM) 5447 return; 5448 5449 sz = req.size; 5450 if ((olh = calloc(1, sz)) == NULL) 5451 return; 5452 5453 olh->size = sz; 5454 if (do_get3(IP_FW_DUMP_SRVOBJECTS, &olh->opheader, &sz) != 0) { 5455 free(olh); 5456 return; 5457 } 5458 5459 if (olh->count > 0) 5460 printf("Objects list:\n"); 5461 else 5462 printf("There are no objects\n"); 5463 ntlv = (ipfw_obj_ntlv *)(olh + 1); 5464 for (i = 0; i < olh->count; i++) { 5465 name = match_value(otypes, ntlv->head.type); 5466 if (name == NULL) 5467 name = lookup_eaction_name( 5468 (ipfw_obj_ntlv *)(olh + 1), olh->count, 5469 ntlv->head.type); 5470 if (name == NULL) 5471 printf(" kidx: %4d\ttype: %10d\tname: %s\n", 5472 ntlv->idx, ntlv->head.type, ntlv->name); 5473 else 5474 printf(" kidx: %4d\ttype: %10s\tname: %s\n", 5475 ntlv->idx, name, ntlv->name); 5476 ntlv++; 5477 } 5478 free(olh); 5479 } 5480 5481 void 5482 ipfw_internal_handler(int ac, char *av[]) 5483 { 5484 int tcmd; 5485 5486 ac--; av++; 5487 NEED1("internal cmd required"); 5488 5489 if ((tcmd = match_token(intcmds, *av)) == -1) 5490 errx(EX_USAGE, "invalid internal sub-cmd: %s", *av); 5491 5492 switch (tcmd) { 5493 case TOK_IFLIST: 5494 ipfw_list_tifaces(); 5495 break; 5496 case TOK_TALIST: 5497 ipfw_list_ta(ac, av); 5498 break; 5499 case TOK_OLIST: 5500 ipfw_list_objects(ac, av); 5501 break; 5502 case TOK_VLIST: 5503 ipfw_list_values(ac, av); 5504 break; 5505 } 5506 } 5507 5508 static int 5509 ipfw_get_tracked_ifaces(ipfw_obj_lheader **polh) 5510 { 5511 ipfw_obj_lheader req, *olh; 5512 size_t sz; 5513 5514 memset(&req, 0, sizeof(req)); 5515 sz = sizeof(req); 5516 5517 if (do_get3(IP_FW_XIFLIST, &req.opheader, &sz) != 0) { 5518 if (errno != ENOMEM) 5519 return (errno); 5520 } 5521 5522 sz = req.size; 5523 if ((olh = calloc(1, sz)) == NULL) 5524 return (ENOMEM); 5525 5526 olh->size = sz; 5527 if (do_get3(IP_FW_XIFLIST, &olh->opheader, &sz) != 0) { 5528 free(olh); 5529 return (errno); 5530 } 5531 5532 *polh = olh; 5533 return (0); 5534 } 5535 5536 static int 5537 ifinfo_cmp(const void *a, const void *b) 5538 { 5539 ipfw_iface_info *ia, *ib; 5540 5541 ia = (ipfw_iface_info *)a; 5542 ib = (ipfw_iface_info *)b; 5543 5544 return (stringnum_cmp(ia->ifname, ib->ifname)); 5545 } 5546 5547 /* 5548 * Retrieves table list from kernel, 5549 * optionally sorts it and calls requested function for each table. 5550 * Returns 0 on success. 5551 */ 5552 static void 5553 ipfw_list_tifaces() 5554 { 5555 ipfw_obj_lheader *olh; 5556 ipfw_iface_info *info; 5557 int i, error; 5558 5559 if ((error = ipfw_get_tracked_ifaces(&olh)) != 0) 5560 err(EX_OSERR, "Unable to request ipfw tracked interface list"); 5561 5562 5563 qsort(olh + 1, olh->count, olh->objsize, ifinfo_cmp); 5564 5565 info = (ipfw_iface_info *)(olh + 1); 5566 for (i = 0; i < olh->count; i++) { 5567 if (info->flags & IPFW_IFFLAG_RESOLVED) 5568 printf("%s ifindex: %d refcount: %u changes: %u\n", 5569 info->ifname, info->ifindex, info->refcnt, 5570 info->gencnt); 5571 else 5572 printf("%s ifindex: unresolved refcount: %u changes: %u\n", 5573 info->ifname, info->refcnt, info->gencnt); 5574 info = (ipfw_iface_info *)((caddr_t)info + olh->objsize); 5575 } 5576 5577 free(olh); 5578 } 5579 5580 5581 5582 5583