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 { "nat64clat", TOK_NAT64CLAT }, 241 { "nat64lsn", TOK_NAT64LSN }, 242 { "nat64stl", TOK_NAT64STL }, 243 { "nptv6", TOK_NPTV6 }, 244 { "tcp-setmss", TOK_TCPSETMSS }, 245 { NULL, 0 } /* terminator */ 246 }; 247 248 static struct _s_x rule_actions[] = { 249 { "abort6", TOK_ABORT6 }, 250 { "abort", TOK_ABORT }, 251 { "accept", TOK_ACCEPT }, 252 { "pass", TOK_ACCEPT }, 253 { "allow", TOK_ACCEPT }, 254 { "permit", TOK_ACCEPT }, 255 { "count", TOK_COUNT }, 256 { "pipe", TOK_PIPE }, 257 { "queue", TOK_QUEUE }, 258 { "divert", TOK_DIVERT }, 259 { "tee", TOK_TEE }, 260 { "netgraph", TOK_NETGRAPH }, 261 { "ngtee", TOK_NGTEE }, 262 { "fwd", TOK_FORWARD }, 263 { "forward", TOK_FORWARD }, 264 { "skipto", TOK_SKIPTO }, 265 { "deny", TOK_DENY }, 266 { "drop", TOK_DENY }, 267 { "reject", TOK_REJECT }, 268 { "reset6", TOK_RESET6 }, 269 { "reset", TOK_RESET }, 270 { "unreach6", TOK_UNREACH6 }, 271 { "unreach", TOK_UNREACH }, 272 { "check-state", TOK_CHECKSTATE }, 273 { "//", TOK_COMMENT }, 274 { "nat", TOK_NAT }, 275 { "reass", TOK_REASS }, 276 { "setfib", TOK_SETFIB }, 277 { "setdscp", TOK_SETDSCP }, 278 { "call", TOK_CALL }, 279 { "return", TOK_RETURN }, 280 { "eaction", TOK_EACTION }, 281 { "tcp-setmss", TOK_TCPSETMSS }, 282 { NULL, 0 } /* terminator */ 283 }; 284 285 static struct _s_x rule_action_params[] = { 286 { "altq", TOK_ALTQ }, 287 { "log", TOK_LOG }, 288 { "tag", TOK_TAG }, 289 { "untag", TOK_UNTAG }, 290 { NULL, 0 } /* terminator */ 291 }; 292 293 /* 294 * The 'lookup' instruction accepts one of the following arguments. 295 * -1 is a terminator for the list. 296 * Arguments are passed as v[1] in O_DST_LOOKUP options. 297 */ 298 static int lookup_key[] = { 299 TOK_DSTIP, TOK_SRCIP, TOK_DSTPORT, TOK_SRCPORT, 300 TOK_UID, TOK_JAIL, TOK_DSCP, -1 }; 301 302 static struct _s_x rule_options[] = { 303 { "tagged", TOK_TAGGED }, 304 { "uid", TOK_UID }, 305 { "gid", TOK_GID }, 306 { "jail", TOK_JAIL }, 307 { "in", TOK_IN }, 308 { "limit", TOK_LIMIT }, 309 { "set-limit", TOK_SETLIMIT }, 310 { "keep-state", TOK_KEEPSTATE }, 311 { "record-state", TOK_RECORDSTATE }, 312 { "bridged", TOK_LAYER2 }, 313 { "layer2", TOK_LAYER2 }, 314 { "out", TOK_OUT }, 315 { "diverted", TOK_DIVERTED }, 316 { "diverted-loopback", TOK_DIVERTEDLOOPBACK }, 317 { "diverted-output", TOK_DIVERTEDOUTPUT }, 318 { "xmit", TOK_XMIT }, 319 { "recv", TOK_RECV }, 320 { "via", TOK_VIA }, 321 { "fragment", TOK_FRAG }, 322 { "frag", TOK_FRAG }, 323 { "fib", TOK_FIB }, 324 { "ipoptions", TOK_IPOPTS }, 325 { "ipopts", TOK_IPOPTS }, 326 { "iplen", TOK_IPLEN }, 327 { "ipid", TOK_IPID }, 328 { "ipprecedence", TOK_IPPRECEDENCE }, 329 { "dscp", TOK_DSCP }, 330 { "iptos", TOK_IPTOS }, 331 { "ipttl", TOK_IPTTL }, 332 { "ipversion", TOK_IPVER }, 333 { "ipver", TOK_IPVER }, 334 { "estab", TOK_ESTAB }, 335 { "established", TOK_ESTAB }, 336 { "setup", TOK_SETUP }, 337 { "sockarg", TOK_SOCKARG }, 338 { "tcpdatalen", TOK_TCPDATALEN }, 339 { "tcpflags", TOK_TCPFLAGS }, 340 { "tcpflgs", TOK_TCPFLAGS }, 341 { "tcpoptions", TOK_TCPOPTS }, 342 { "tcpopts", TOK_TCPOPTS }, 343 { "tcpseq", TOK_TCPSEQ }, 344 { "tcpack", TOK_TCPACK }, 345 { "tcpwin", TOK_TCPWIN }, 346 { "icmptype", TOK_ICMPTYPES }, 347 { "icmptypes", TOK_ICMPTYPES }, 348 { "dst-ip", TOK_DSTIP }, 349 { "src-ip", TOK_SRCIP }, 350 { "dst-port", TOK_DSTPORT }, 351 { "src-port", TOK_SRCPORT }, 352 { "proto", TOK_PROTO }, 353 { "MAC", TOK_MAC }, 354 { "mac", TOK_MAC }, 355 { "mac-type", TOK_MACTYPE }, 356 { "verrevpath", TOK_VERREVPATH }, 357 { "versrcreach", TOK_VERSRCREACH }, 358 { "antispoof", TOK_ANTISPOOF }, 359 { "ipsec", TOK_IPSEC }, 360 { "icmp6type", TOK_ICMP6TYPES }, 361 { "icmp6types", TOK_ICMP6TYPES }, 362 { "ext6hdr", TOK_EXT6HDR}, 363 { "flow-id", TOK_FLOWID}, 364 { "ipv6", TOK_IPV6}, 365 { "ip6", TOK_IPV6}, 366 { "ipv4", TOK_IPV4}, 367 { "ip4", TOK_IPV4}, 368 { "dst-ipv6", TOK_DSTIP6}, 369 { "dst-ip6", TOK_DSTIP6}, 370 { "src-ipv6", TOK_SRCIP6}, 371 { "src-ip6", TOK_SRCIP6}, 372 { "lookup", TOK_LOOKUP}, 373 { "flow", TOK_FLOW}, 374 { "defer-action", TOK_SKIPACTION }, 375 { "defer-immediate-action", TOK_SKIPACTION }, 376 { "//", TOK_COMMENT }, 377 378 { "not", TOK_NOT }, /* pseudo option */ 379 { "!", /* escape ? */ TOK_NOT }, /* pseudo option */ 380 { "or", TOK_OR }, /* pseudo option */ 381 { "|", /* escape */ TOK_OR }, /* pseudo option */ 382 { "{", TOK_STARTBRACE }, /* pseudo option */ 383 { "(", TOK_STARTBRACE }, /* pseudo option */ 384 { "}", TOK_ENDBRACE }, /* pseudo option */ 385 { ")", TOK_ENDBRACE }, /* pseudo option */ 386 { NULL, 0 } /* terminator */ 387 }; 388 389 void bprint_uint_arg(struct buf_pr *bp, const char *str, uint32_t arg); 390 static int ipfw_get_config(struct cmdline_opts *co, struct format_opts *fo, 391 ipfw_cfg_lheader **pcfg, size_t *psize); 392 static int ipfw_show_config(struct cmdline_opts *co, struct format_opts *fo, 393 ipfw_cfg_lheader *cfg, size_t sz, int ac, char **av); 394 static void ipfw_list_tifaces(void); 395 396 struct tidx; 397 static uint16_t pack_object(struct tidx *tstate, char *name, int otype); 398 static uint16_t pack_table(struct tidx *tstate, char *name); 399 400 static char *table_search_ctlv(ipfw_obj_ctlv *ctlv, uint16_t idx); 401 static void object_sort_ctlv(ipfw_obj_ctlv *ctlv); 402 static char *object_search_ctlv(ipfw_obj_ctlv *ctlv, uint16_t idx, 403 uint16_t type); 404 405 /* 406 * Simple string buffer API. 407 * Used to simplify buffer passing between function and for 408 * transparent overrun handling. 409 */ 410 411 /* 412 * Allocates new buffer of given size @sz. 413 * 414 * Returns 0 on success. 415 */ 416 int 417 bp_alloc(struct buf_pr *b, size_t size) 418 { 419 memset(b, 0, sizeof(struct buf_pr)); 420 421 if ((b->buf = calloc(1, size)) == NULL) 422 return (ENOMEM); 423 424 b->ptr = b->buf; 425 b->size = size; 426 b->avail = b->size; 427 428 return (0); 429 } 430 431 void 432 bp_free(struct buf_pr *b) 433 { 434 435 free(b->buf); 436 } 437 438 /* 439 * Flushes buffer so new writer start from beginning. 440 */ 441 void 442 bp_flush(struct buf_pr *b) 443 { 444 445 b->ptr = b->buf; 446 b->avail = b->size; 447 b->buf[0] = '\0'; 448 } 449 450 /* 451 * Print message specified by @format and args. 452 * Automatically manage buffer space and transparently handle 453 * buffer overruns. 454 * 455 * Returns number of bytes that should have been printed. 456 */ 457 int 458 bprintf(struct buf_pr *b, char *format, ...) 459 { 460 va_list args; 461 int i; 462 463 va_start(args, format); 464 465 i = vsnprintf(b->ptr, b->avail, format, args); 466 va_end(args); 467 468 if (i > b->avail || i < 0) { 469 /* Overflow or print error */ 470 b->avail = 0; 471 } else { 472 b->ptr += i; 473 b->avail -= i; 474 } 475 476 b->needed += i; 477 478 return (i); 479 } 480 481 /* 482 * Special values printer for tablearg-aware opcodes. 483 */ 484 void 485 bprint_uint_arg(struct buf_pr *bp, const char *str, uint32_t arg) 486 { 487 488 if (str != NULL) 489 bprintf(bp, "%s", str); 490 if (arg == IP_FW_TARG) 491 bprintf(bp, "tablearg"); 492 else 493 bprintf(bp, "%u", arg); 494 } 495 496 /* 497 * Helper routine to print a possibly unaligned uint64_t on 498 * various platform. If width > 0, print the value with 499 * the desired width, followed by a space; 500 * otherwise, return the required width. 501 */ 502 int 503 pr_u64(struct buf_pr *b, uint64_t *pd, int width) 504 { 505 #ifdef TCC 506 #define U64_FMT "I64" 507 #else 508 #define U64_FMT "llu" 509 #endif 510 uint64_t u; 511 unsigned long long d; 512 513 bcopy (pd, &u, sizeof(u)); 514 d = u; 515 return (width > 0) ? 516 bprintf(b, "%*" U64_FMT " ", width, d) : 517 snprintf(NULL, 0, "%" U64_FMT, d) ; 518 #undef U64_FMT 519 } 520 521 522 void * 523 safe_calloc(size_t number, size_t size) 524 { 525 void *ret = calloc(number, size); 526 527 if (ret == NULL) 528 err(EX_OSERR, "calloc"); 529 return ret; 530 } 531 532 void * 533 safe_realloc(void *ptr, size_t size) 534 { 535 void *ret = realloc(ptr, size); 536 537 if (ret == NULL) 538 err(EX_OSERR, "realloc"); 539 return ret; 540 } 541 542 /* 543 * Compare things like interface or table names. 544 */ 545 int 546 stringnum_cmp(const char *a, const char *b) 547 { 548 int la, lb; 549 550 la = strlen(a); 551 lb = strlen(b); 552 553 if (la > lb) 554 return (1); 555 else if (la < lb) 556 return (-01); 557 558 return (strcmp(a, b)); 559 } 560 561 562 /* 563 * conditionally runs the command. 564 * Selected options or negative -> getsockopt 565 */ 566 int 567 do_cmd(int optname, void *optval, uintptr_t optlen) 568 { 569 int i; 570 571 if (co.test_only) 572 return 0; 573 574 if (ipfw_socket == -1) 575 ipfw_socket = socket(AF_INET, SOCK_RAW, IPPROTO_RAW); 576 if (ipfw_socket < 0) 577 err(EX_UNAVAILABLE, "socket"); 578 579 if (optname == IP_FW_GET || optname == IP_DUMMYNET_GET || 580 optname == IP_FW_ADD || optname == IP_FW3 || 581 optname == IP_FW_NAT_GET_CONFIG || 582 optname < 0 || 583 optname == IP_FW_NAT_GET_LOG) { 584 if (optname < 0) 585 optname = -optname; 586 i = getsockopt(ipfw_socket, IPPROTO_IP, optname, optval, 587 (socklen_t *)optlen); 588 } else { 589 i = setsockopt(ipfw_socket, IPPROTO_IP, optname, optval, optlen); 590 } 591 return i; 592 } 593 594 /* 595 * do_set3 - pass ipfw control cmd to kernel 596 * @optname: option name 597 * @optval: pointer to option data 598 * @optlen: option length 599 * 600 * Assumes op3 header is already embedded. 601 * Calls setsockopt() with IP_FW3 as kernel-visible opcode. 602 * Returns 0 on success or errno otherwise. 603 */ 604 int 605 do_set3(int optname, ip_fw3_opheader *op3, size_t optlen) 606 { 607 608 if (co.test_only) 609 return (0); 610 611 if (ipfw_socket == -1) 612 ipfw_socket = socket(AF_INET, SOCK_RAW, IPPROTO_RAW); 613 if (ipfw_socket < 0) 614 err(EX_UNAVAILABLE, "socket"); 615 616 op3->opcode = optname; 617 618 return (setsockopt(ipfw_socket, IPPROTO_IP, IP_FW3, op3, optlen)); 619 } 620 621 /* 622 * do_get3 - pass ipfw control cmd to kernel 623 * @optname: option name 624 * @optval: pointer to option data 625 * @optlen: pointer to option length 626 * 627 * Assumes op3 header is already embedded. 628 * Calls getsockopt() with IP_FW3 as kernel-visible opcode. 629 * Returns 0 on success or errno otherwise. 630 */ 631 int 632 do_get3(int optname, ip_fw3_opheader *op3, size_t *optlen) 633 { 634 int error; 635 socklen_t len; 636 637 if (co.test_only) 638 return (0); 639 640 if (ipfw_socket == -1) 641 ipfw_socket = socket(AF_INET, SOCK_RAW, IPPROTO_RAW); 642 if (ipfw_socket < 0) 643 err(EX_UNAVAILABLE, "socket"); 644 645 op3->opcode = optname; 646 647 len = *optlen; 648 error = getsockopt(ipfw_socket, IPPROTO_IP, IP_FW3, op3, &len); 649 *optlen = len; 650 651 return (error); 652 } 653 654 /** 655 * match_token takes a table and a string, returns the value associated 656 * with the string (-1 in case of failure). 657 */ 658 int 659 match_token(struct _s_x *table, const char *string) 660 { 661 struct _s_x *pt; 662 uint i = strlen(string); 663 664 for (pt = table ; i && pt->s != NULL ; pt++) 665 if (strlen(pt->s) == i && !bcmp(string, pt->s, i)) 666 return pt->x; 667 return (-1); 668 } 669 670 /** 671 * match_token_relaxed takes a table and a string, returns the value associated 672 * with the string for the best match. 673 * 674 * Returns: 675 * value from @table for matched records 676 * -1 for non-matched records 677 * -2 if more than one records match @string. 678 */ 679 int 680 match_token_relaxed(struct _s_x *table, const char *string) 681 { 682 struct _s_x *pt, *m; 683 int i, c; 684 685 i = strlen(string); 686 c = 0; 687 688 for (pt = table ; i != 0 && pt->s != NULL ; pt++) { 689 if (strncmp(pt->s, string, i) != 0) 690 continue; 691 m = pt; 692 c++; 693 } 694 695 if (c == 1) 696 return (m->x); 697 698 return (c > 0 ? -2: -1); 699 } 700 701 int 702 get_token(struct _s_x *table, const char *string, const char *errbase) 703 { 704 int tcmd; 705 706 if ((tcmd = match_token_relaxed(table, string)) < 0) 707 errx(EX_USAGE, "%s %s %s", 708 (tcmd == 0) ? "invalid" : "ambiguous", errbase, string); 709 710 return (tcmd); 711 } 712 713 /** 714 * match_value takes a table and a value, returns the string associated 715 * with the value (NULL in case of failure). 716 */ 717 char const * 718 match_value(struct _s_x *p, int value) 719 { 720 for (; p->s != NULL; p++) 721 if (p->x == value) 722 return p->s; 723 return NULL; 724 } 725 726 size_t 727 concat_tokens(char *buf, size_t bufsize, struct _s_x *table, char *delimiter) 728 { 729 struct _s_x *pt; 730 int l; 731 size_t sz; 732 733 for (sz = 0, pt = table ; pt->s != NULL; pt++) { 734 l = snprintf(buf + sz, bufsize - sz, "%s%s", 735 (sz == 0) ? "" : delimiter, pt->s); 736 sz += l; 737 bufsize += l; 738 if (sz > bufsize) 739 return (bufsize); 740 } 741 742 return (sz); 743 } 744 745 /* 746 * helper function to process a set of flags and set bits in the 747 * appropriate masks. 748 */ 749 int 750 fill_flags(struct _s_x *flags, char *p, char **e, uint32_t *set, 751 uint32_t *clear) 752 { 753 char *q; /* points to the separator */ 754 int val; 755 uint32_t *which; /* mask we are working on */ 756 757 while (p && *p) { 758 if (*p == '!') { 759 p++; 760 which = clear; 761 } else 762 which = set; 763 q = strchr(p, ','); 764 if (q) 765 *q++ = '\0'; 766 val = match_token(flags, p); 767 if (val <= 0) { 768 if (e != NULL) 769 *e = p; 770 return (-1); 771 } 772 *which |= (uint32_t)val; 773 p = q; 774 } 775 return (0); 776 } 777 778 void 779 print_flags_buffer(char *buf, size_t sz, struct _s_x *list, uint32_t set) 780 { 781 char const *comma = ""; 782 int i, l; 783 784 for (i = 0; list[i].x != 0; i++) { 785 if ((set & list[i].x) == 0) 786 continue; 787 788 set &= ~list[i].x; 789 l = snprintf(buf, sz, "%s%s", comma, list[i].s); 790 if (l >= sz) 791 return; 792 comma = ","; 793 buf += l; 794 sz -=l; 795 } 796 } 797 798 /* 799 * _substrcmp takes two strings and returns 1 if they do not match, 800 * and 0 if they match exactly or the first string is a sub-string 801 * of the second. A warning is printed to stderr in the case that the 802 * first string is a sub-string of the second. 803 * 804 * This function will be removed in the future through the usual 805 * deprecation process. 806 */ 807 int 808 _substrcmp(const char *str1, const char* str2) 809 { 810 811 if (strncmp(str1, str2, strlen(str1)) != 0) 812 return 1; 813 814 if (strlen(str1) != strlen(str2)) 815 warnx("DEPRECATED: '%s' matched '%s' as a sub-string", 816 str1, str2); 817 return 0; 818 } 819 820 /* 821 * _substrcmp2 takes three strings and returns 1 if the first two do not match, 822 * and 0 if they match exactly or the second string is a sub-string 823 * of the first. A warning is printed to stderr in the case that the 824 * first string does not match the third. 825 * 826 * This function exists to warn about the bizarre construction 827 * strncmp(str, "by", 2) which is used to allow people to use a shortcut 828 * for "bytes". The problem is that in addition to accepting "by", 829 * "byt", "byte", and "bytes", it also excepts "by_rabid_dogs" and any 830 * other string beginning with "by". 831 * 832 * This function will be removed in the future through the usual 833 * deprecation process. 834 */ 835 int 836 _substrcmp2(const char *str1, const char* str2, const char* str3) 837 { 838 839 if (strncmp(str1, str2, strlen(str2)) != 0) 840 return 1; 841 842 if (strcmp(str1, str3) != 0) 843 warnx("DEPRECATED: '%s' matched '%s'", 844 str1, str3); 845 return 0; 846 } 847 848 /* 849 * prints one port, symbolic or numeric 850 */ 851 static void 852 print_port(struct buf_pr *bp, int proto, uint16_t port) 853 { 854 855 if (proto == IPPROTO_ETHERTYPE) { 856 char const *s; 857 858 if (co.do_resolv && (s = match_value(ether_types, port)) ) 859 bprintf(bp, "%s", s); 860 else 861 bprintf(bp, "0x%04x", port); 862 } else { 863 struct servent *se = NULL; 864 if (co.do_resolv) { 865 struct protoent *pe = getprotobynumber(proto); 866 867 se = getservbyport(htons(port), pe ? pe->p_name : NULL); 868 } 869 if (se) 870 bprintf(bp, "%s", se->s_name); 871 else 872 bprintf(bp, "%d", port); 873 } 874 } 875 876 static struct _s_x _port_name[] = { 877 {"dst-port", O_IP_DSTPORT}, 878 {"src-port", O_IP_SRCPORT}, 879 {"ipid", O_IPID}, 880 {"iplen", O_IPLEN}, 881 {"ipttl", O_IPTTL}, 882 {"mac-type", O_MAC_TYPE}, 883 {"tcpdatalen", O_TCPDATALEN}, 884 {"tcpwin", O_TCPWIN}, 885 {"tagged", O_TAGGED}, 886 {NULL, 0} 887 }; 888 889 /* 890 * Print the values in a list 16-bit items of the types above. 891 * XXX todo: add support for mask. 892 */ 893 static void 894 print_newports(struct buf_pr *bp, ipfw_insn_u16 *cmd, int proto, int opcode) 895 { 896 uint16_t *p = cmd->ports; 897 int i; 898 char const *sep; 899 900 if (opcode != 0) { 901 sep = match_value(_port_name, opcode); 902 if (sep == NULL) 903 sep = "???"; 904 bprintf(bp, " %s", sep); 905 } 906 sep = " "; 907 for (i = F_LEN((ipfw_insn *)cmd) - 1; i > 0; i--, p += 2) { 908 bprintf(bp, "%s", sep); 909 print_port(bp, proto, p[0]); 910 if (p[0] != p[1]) { 911 bprintf(bp, "-"); 912 print_port(bp, proto, p[1]); 913 } 914 sep = ","; 915 } 916 } 917 918 /* 919 * Like strtol, but also translates service names into port numbers 920 * for some protocols. 921 * In particular: 922 * proto == -1 disables the protocol check; 923 * proto == IPPROTO_ETHERTYPE looks up an internal table 924 * proto == <some value in /etc/protocols> matches the values there. 925 * Returns *end == s in case the parameter is not found. 926 */ 927 static int 928 strtoport(char *s, char **end, int base, int proto) 929 { 930 char *p, *buf; 931 char *s1; 932 int i; 933 934 *end = s; /* default - not found */ 935 if (*s == '\0') 936 return 0; /* not found */ 937 938 if (isdigit(*s)) 939 return strtol(s, end, base); 940 941 /* 942 * find separator. '\\' escapes the next char. 943 */ 944 for (s1 = s; *s1 && (isalnum(*s1) || *s1 == '\\' || 945 *s1 == '_' || *s1 == '.') ; s1++) 946 if (*s1 == '\\' && s1[1] != '\0') 947 s1++; 948 949 buf = safe_calloc(s1 - s + 1, 1); 950 951 /* 952 * copy into a buffer skipping backslashes 953 */ 954 for (p = s, i = 0; p != s1 ; p++) 955 if (*p != '\\') 956 buf[i++] = *p; 957 buf[i++] = '\0'; 958 959 if (proto == IPPROTO_ETHERTYPE) { 960 i = match_token(ether_types, buf); 961 free(buf); 962 if (i != -1) { /* found */ 963 *end = s1; 964 return i; 965 } 966 } else { 967 struct protoent *pe = NULL; 968 struct servent *se; 969 970 if (proto != 0) 971 pe = getprotobynumber(proto); 972 setservent(1); 973 se = getservbyname(buf, pe ? pe->p_name : NULL); 974 free(buf); 975 if (se != NULL) { 976 *end = s1; 977 return ntohs(se->s_port); 978 } 979 } 980 return 0; /* not found */ 981 } 982 983 /* 984 * Fill the body of the command with the list of port ranges. 985 */ 986 static int 987 fill_newports(ipfw_insn_u16 *cmd, char *av, int proto, int cblen) 988 { 989 uint16_t a, b, *p = cmd->ports; 990 int i = 0; 991 char *s = av; 992 993 while (*s) { 994 a = strtoport(av, &s, 0, proto); 995 if (s == av) /* empty or invalid argument */ 996 return (0); 997 998 CHECK_LENGTH(cblen, i + 2); 999 1000 switch (*s) { 1001 case '-': /* a range */ 1002 av = s + 1; 1003 b = strtoport(av, &s, 0, proto); 1004 /* Reject expressions like '1-abc' or '1-2-3'. */ 1005 if (s == av || (*s != ',' && *s != '\0')) 1006 return (0); 1007 p[0] = a; 1008 p[1] = b; 1009 break; 1010 case ',': /* comma separated list */ 1011 case '\0': 1012 p[0] = p[1] = a; 1013 break; 1014 default: 1015 warnx("port list: invalid separator <%c> in <%s>", 1016 *s, av); 1017 return (0); 1018 } 1019 1020 i++; 1021 p += 2; 1022 av = s + 1; 1023 } 1024 if (i > 0) { 1025 if (i + 1 > F_LEN_MASK) 1026 errx(EX_DATAERR, "too many ports/ranges\n"); 1027 cmd->o.len |= i + 1; /* leave F_NOT and F_OR untouched */ 1028 } 1029 return (i); 1030 } 1031 1032 /* 1033 * Fill the body of the command with the list of DiffServ codepoints. 1034 */ 1035 static void 1036 fill_dscp(ipfw_insn *cmd, char *av, int cblen) 1037 { 1038 uint32_t *low, *high; 1039 char *s = av, *a; 1040 int code; 1041 1042 cmd->opcode = O_DSCP; 1043 cmd->len |= F_INSN_SIZE(ipfw_insn_u32) + 1; 1044 1045 CHECK_CMDLEN; 1046 1047 low = (uint32_t *)(cmd + 1); 1048 high = low + 1; 1049 1050 *low = 0; 1051 *high = 0; 1052 1053 while (s != NULL) { 1054 a = strchr(s, ','); 1055 1056 if (a != NULL) 1057 *a++ = '\0'; 1058 1059 if (isalpha(*s)) { 1060 if ((code = match_token(f_ipdscp, s)) == -1) 1061 errx(EX_DATAERR, "Unknown DSCP code"); 1062 } else { 1063 code = strtoul(s, NULL, 10); 1064 if (code < 0 || code > 63) 1065 errx(EX_DATAERR, "Invalid DSCP value"); 1066 } 1067 1068 if (code >= 32) 1069 *high |= 1 << (code - 32); 1070 else 1071 *low |= 1 << code; 1072 1073 s = a; 1074 } 1075 } 1076 1077 static struct _s_x icmpcodes[] = { 1078 { "net", ICMP_UNREACH_NET }, 1079 { "host", ICMP_UNREACH_HOST }, 1080 { "protocol", ICMP_UNREACH_PROTOCOL }, 1081 { "port", ICMP_UNREACH_PORT }, 1082 { "needfrag", ICMP_UNREACH_NEEDFRAG }, 1083 { "srcfail", ICMP_UNREACH_SRCFAIL }, 1084 { "net-unknown", ICMP_UNREACH_NET_UNKNOWN }, 1085 { "host-unknown", ICMP_UNREACH_HOST_UNKNOWN }, 1086 { "isolated", ICMP_UNREACH_ISOLATED }, 1087 { "net-prohib", ICMP_UNREACH_NET_PROHIB }, 1088 { "host-prohib", ICMP_UNREACH_HOST_PROHIB }, 1089 { "tosnet", ICMP_UNREACH_TOSNET }, 1090 { "toshost", ICMP_UNREACH_TOSHOST }, 1091 { "filter-prohib", ICMP_UNREACH_FILTER_PROHIB }, 1092 { "host-precedence", ICMP_UNREACH_HOST_PRECEDENCE }, 1093 { "precedence-cutoff", ICMP_UNREACH_PRECEDENCE_CUTOFF }, 1094 { NULL, 0 } 1095 }; 1096 1097 static void 1098 fill_reject_code(u_short *codep, char *str) 1099 { 1100 int val; 1101 char *s; 1102 1103 val = strtoul(str, &s, 0); 1104 if (s == str || *s != '\0' || val >= 0x100) 1105 val = match_token(icmpcodes, str); 1106 if (val < 0) 1107 errx(EX_DATAERR, "unknown ICMP unreachable code ``%s''", str); 1108 *codep = val; 1109 return; 1110 } 1111 1112 static void 1113 print_reject_code(struct buf_pr *bp, uint16_t code) 1114 { 1115 char const *s; 1116 1117 if ((s = match_value(icmpcodes, code)) != NULL) 1118 bprintf(bp, "unreach %s", s); 1119 else 1120 bprintf(bp, "unreach %u", code); 1121 } 1122 1123 /* 1124 * Returns the number of bits set (from left) in a contiguous bitmask, 1125 * or -1 if the mask is not contiguous. 1126 * XXX this needs a proper fix. 1127 * This effectively works on masks in big-endian (network) format. 1128 * when compiled on little endian architectures. 1129 * 1130 * First bit is bit 7 of the first byte -- note, for MAC addresses, 1131 * the first bit on the wire is bit 0 of the first byte. 1132 * len is the max length in bits. 1133 */ 1134 int 1135 contigmask(uint8_t *p, int len) 1136 { 1137 int i, n; 1138 1139 for (i=0; i<len ; i++) 1140 if ( (p[i/8] & (1 << (7 - (i%8)))) == 0) /* first bit unset */ 1141 break; 1142 for (n=i+1; n < len; n++) 1143 if ( (p[n/8] & (1 << (7 - (n%8)))) != 0) 1144 return -1; /* mask not contiguous */ 1145 return i; 1146 } 1147 1148 /* 1149 * print flags set/clear in the two bitmasks passed as parameters. 1150 * There is a specialized check for f_tcpflags. 1151 */ 1152 static void 1153 print_flags(struct buf_pr *bp, char const *name, ipfw_insn *cmd, 1154 struct _s_x *list) 1155 { 1156 char const *comma = ""; 1157 int i; 1158 uint8_t set = cmd->arg1 & 0xff; 1159 uint8_t clear = (cmd->arg1 >> 8) & 0xff; 1160 1161 if (list == f_tcpflags && set == TH_SYN && clear == TH_ACK) { 1162 bprintf(bp, " setup"); 1163 return; 1164 } 1165 1166 bprintf(bp, " %s ", name); 1167 for (i=0; list[i].x != 0; i++) { 1168 if (set & list[i].x) { 1169 set &= ~list[i].x; 1170 bprintf(bp, "%s%s", comma, list[i].s); 1171 comma = ","; 1172 } 1173 if (clear & list[i].x) { 1174 clear &= ~list[i].x; 1175 bprintf(bp, "%s!%s", comma, list[i].s); 1176 comma = ","; 1177 } 1178 } 1179 } 1180 1181 1182 /* 1183 * Print the ip address contained in a command. 1184 */ 1185 static void 1186 print_ip(struct buf_pr *bp, const struct format_opts *fo, ipfw_insn_ip *cmd) 1187 { 1188 struct hostent *he = NULL; 1189 struct in_addr *ia; 1190 uint32_t len = F_LEN((ipfw_insn *)cmd); 1191 uint32_t *a = ((ipfw_insn_u32 *)cmd)->d; 1192 char *t; 1193 1194 bprintf(bp, " "); 1195 if (cmd->o.opcode == O_IP_DST_LOOKUP && len > F_INSN_SIZE(ipfw_insn_u32)) { 1196 uint32_t d = a[1]; 1197 const char *arg = "<invalid>"; 1198 1199 if (d < sizeof(lookup_key)/sizeof(lookup_key[0])) 1200 arg = match_value(rule_options, lookup_key[d]); 1201 t = table_search_ctlv(fo->tstate, ((ipfw_insn *)cmd)->arg1); 1202 bprintf(bp, "lookup %s %s", arg, t); 1203 return; 1204 } 1205 if (cmd->o.opcode == O_IP_SRC_ME || cmd->o.opcode == O_IP_DST_ME) { 1206 bprintf(bp, "me"); 1207 return; 1208 } 1209 if (cmd->o.opcode == O_IP_SRC_LOOKUP || 1210 cmd->o.opcode == O_IP_DST_LOOKUP) { 1211 t = table_search_ctlv(fo->tstate, ((ipfw_insn *)cmd)->arg1); 1212 bprintf(bp, "table(%s", t); 1213 if (len == F_INSN_SIZE(ipfw_insn_u32)) 1214 bprintf(bp, ",%u", *a); 1215 bprintf(bp, ")"); 1216 return; 1217 } 1218 if (cmd->o.opcode == O_IP_SRC_SET || cmd->o.opcode == O_IP_DST_SET) { 1219 uint32_t x, *map = (uint32_t *)&(cmd->mask); 1220 int i, j; 1221 char comma = '{'; 1222 1223 x = cmd->o.arg1 - 1; 1224 x = htonl( ~x ); 1225 cmd->addr.s_addr = htonl(cmd->addr.s_addr); 1226 bprintf(bp, "%s/%d", inet_ntoa(cmd->addr), 1227 contigmask((uint8_t *)&x, 32)); 1228 x = cmd->addr.s_addr = htonl(cmd->addr.s_addr); 1229 x &= 0xff; /* base */ 1230 /* 1231 * Print bits and ranges. 1232 * Locate first bit set (i), then locate first bit unset (j). 1233 * If we have 3+ consecutive bits set, then print them as a 1234 * range, otherwise only print the initial bit and rescan. 1235 */ 1236 for (i=0; i < cmd->o.arg1; i++) 1237 if (map[i/32] & (1<<(i & 31))) { 1238 for (j=i+1; j < cmd->o.arg1; j++) 1239 if (!(map[ j/32] & (1<<(j & 31)))) 1240 break; 1241 bprintf(bp, "%c%d", comma, i+x); 1242 if (j>i+2) { /* range has at least 3 elements */ 1243 bprintf(bp, "-%d", j-1+x); 1244 i = j-1; 1245 } 1246 comma = ','; 1247 } 1248 bprintf(bp, "}"); 1249 return; 1250 } 1251 /* 1252 * len == 2 indicates a single IP, whereas lists of 1 or more 1253 * addr/mask pairs have len = (2n+1). We convert len to n so we 1254 * use that to count the number of entries. 1255 */ 1256 for (len = len / 2; len > 0; len--, a += 2) { 1257 int mb = /* mask length */ 1258 (cmd->o.opcode == O_IP_SRC || cmd->o.opcode == O_IP_DST) ? 1259 32 : contigmask((uint8_t *)&(a[1]), 32); 1260 if (mb == 32 && co.do_resolv) 1261 he = gethostbyaddr((char *)&(a[0]), sizeof(in_addr_t), 1262 AF_INET); 1263 if (he != NULL) /* resolved to name */ 1264 bprintf(bp, "%s", he->h_name); 1265 else if (mb == 0) /* any */ 1266 bprintf(bp, "any"); 1267 else { /* numeric IP followed by some kind of mask */ 1268 ia = (struct in_addr *)&a[0]; 1269 bprintf(bp, "%s", inet_ntoa(*ia)); 1270 if (mb < 0) { 1271 ia = (struct in_addr *)&a[1]; 1272 bprintf(bp, ":%s", inet_ntoa(*ia)); 1273 } else if (mb < 32) 1274 bprintf(bp, "/%d", mb); 1275 } 1276 if (len > 1) 1277 bprintf(bp, ","); 1278 } 1279 } 1280 1281 /* 1282 * prints a MAC address/mask pair 1283 */ 1284 static void 1285 format_mac(struct buf_pr *bp, uint8_t *addr, uint8_t *mask) 1286 { 1287 int l = contigmask(mask, 48); 1288 1289 if (l == 0) 1290 bprintf(bp, " any"); 1291 else { 1292 bprintf(bp, " %02x:%02x:%02x:%02x:%02x:%02x", 1293 addr[0], addr[1], addr[2], addr[3], addr[4], addr[5]); 1294 if (l == -1) 1295 bprintf(bp, "&%02x:%02x:%02x:%02x:%02x:%02x", 1296 mask[0], mask[1], mask[2], 1297 mask[3], mask[4], mask[5]); 1298 else if (l < 48) 1299 bprintf(bp, "/%d", l); 1300 } 1301 } 1302 1303 static void 1304 print_mac(struct buf_pr *bp, ipfw_insn_mac *mac) 1305 { 1306 1307 bprintf(bp, " MAC"); 1308 format_mac(bp, mac->addr, mac->mask); 1309 format_mac(bp, mac->addr + 6, mac->mask + 6); 1310 } 1311 1312 static void 1313 fill_icmptypes(ipfw_insn_u32 *cmd, char *av) 1314 { 1315 uint8_t type; 1316 1317 cmd->d[0] = 0; 1318 while (*av) { 1319 if (*av == ',') 1320 av++; 1321 1322 type = strtoul(av, &av, 0); 1323 1324 if (*av != ',' && *av != '\0') 1325 errx(EX_DATAERR, "invalid ICMP type"); 1326 1327 if (type > 31) 1328 errx(EX_DATAERR, "ICMP type out of range"); 1329 1330 cmd->d[0] |= 1 << type; 1331 } 1332 cmd->o.opcode = O_ICMPTYPE; 1333 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32); 1334 } 1335 1336 static void 1337 print_icmptypes(struct buf_pr *bp, ipfw_insn_u32 *cmd) 1338 { 1339 int i; 1340 char sep= ' '; 1341 1342 bprintf(bp, " icmptypes"); 1343 for (i = 0; i < 32; i++) { 1344 if ( (cmd->d[0] & (1 << (i))) == 0) 1345 continue; 1346 bprintf(bp, "%c%d", sep, i); 1347 sep = ','; 1348 } 1349 } 1350 1351 static void 1352 print_dscp(struct buf_pr *bp, ipfw_insn_u32 *cmd) 1353 { 1354 int i = 0; 1355 uint32_t *v; 1356 char sep= ' '; 1357 const char *code; 1358 1359 bprintf(bp, " dscp"); 1360 v = cmd->d; 1361 while (i < 64) { 1362 if (*v & (1 << i)) { 1363 if ((code = match_value(f_ipdscp, i)) != NULL) 1364 bprintf(bp, "%c%s", sep, code); 1365 else 1366 bprintf(bp, "%c%d", sep, i); 1367 sep = ','; 1368 } 1369 1370 if ((++i % 32) == 0) 1371 v++; 1372 } 1373 } 1374 1375 #define insntod(cmd, type) ((ipfw_insn_ ## type *)(cmd)) 1376 struct show_state { 1377 struct ip_fw_rule *rule; 1378 const ipfw_insn *eaction; 1379 uint8_t *printed; 1380 int flags; 1381 #define HAVE_PROTO 0x0001 1382 #define HAVE_SRCIP 0x0002 1383 #define HAVE_DSTIP 0x0004 1384 #define HAVE_PROBE_STATE 0x0008 1385 int proto; 1386 int or_block; 1387 }; 1388 1389 static int 1390 init_show_state(struct show_state *state, struct ip_fw_rule *rule) 1391 { 1392 1393 state->printed = calloc(rule->cmd_len, sizeof(uint8_t)); 1394 if (state->printed == NULL) 1395 return (ENOMEM); 1396 state->rule = rule; 1397 state->eaction = NULL; 1398 state->flags = 0; 1399 state->proto = 0; 1400 state->or_block = 0; 1401 return (0); 1402 } 1403 1404 static void 1405 free_show_state(struct show_state *state) 1406 { 1407 1408 free(state->printed); 1409 } 1410 1411 static uint8_t 1412 is_printed_opcode(struct show_state *state, const ipfw_insn *cmd) 1413 { 1414 1415 return (state->printed[cmd - state->rule->cmd]); 1416 } 1417 1418 static void 1419 mark_printed(struct show_state *state, const ipfw_insn *cmd) 1420 { 1421 1422 state->printed[cmd - state->rule->cmd] = 1; 1423 } 1424 1425 static void 1426 print_limit_mask(struct buf_pr *bp, const ipfw_insn_limit *limit) 1427 { 1428 struct _s_x *p = limit_masks; 1429 char const *comma = " "; 1430 uint8_t x; 1431 1432 for (x = limit->limit_mask; p->x != 0; p++) { 1433 if ((x & p->x) == p->x) { 1434 x &= ~p->x; 1435 bprintf(bp, "%s%s", comma, p->s); 1436 comma = ","; 1437 } 1438 } 1439 bprint_uint_arg(bp, " ", limit->conn_limit); 1440 } 1441 1442 static int 1443 print_instruction(struct buf_pr *bp, const struct format_opts *fo, 1444 struct show_state *state, ipfw_insn *cmd) 1445 { 1446 struct protoent *pe; 1447 struct passwd *pwd; 1448 struct group *grp; 1449 const char *s; 1450 double d; 1451 1452 if (is_printed_opcode(state, cmd)) 1453 return (0); 1454 if ((cmd->len & F_OR) != 0 && state->or_block == 0) 1455 bprintf(bp, " {"); 1456 if (cmd->opcode != O_IN && (cmd->len & F_NOT) != 0) 1457 bprintf(bp, " not"); 1458 1459 switch (cmd->opcode) { 1460 case O_PROB: 1461 d = 1.0 * insntod(cmd, u32)->d[0] / 0x7fffffff; 1462 bprintf(bp, "prob %f ", d); 1463 break; 1464 case O_PROBE_STATE: /* no need to print anything here */ 1465 state->flags |= HAVE_PROBE_STATE; 1466 break; 1467 case O_IP_SRC: 1468 case O_IP_SRC_LOOKUP: 1469 case O_IP_SRC_MASK: 1470 case O_IP_SRC_ME: 1471 case O_IP_SRC_SET: 1472 if (state->flags & HAVE_SRCIP) 1473 bprintf(bp, " src-ip"); 1474 print_ip(bp, fo, insntod(cmd, ip)); 1475 break; 1476 case O_IP_DST: 1477 case O_IP_DST_LOOKUP: 1478 case O_IP_DST_MASK: 1479 case O_IP_DST_ME: 1480 case O_IP_DST_SET: 1481 if (state->flags & HAVE_DSTIP) 1482 bprintf(bp, " dst-ip"); 1483 print_ip(bp, fo, insntod(cmd, ip)); 1484 break; 1485 case O_IP6_SRC: 1486 case O_IP6_SRC_MASK: 1487 case O_IP6_SRC_ME: 1488 if (state->flags & HAVE_SRCIP) 1489 bprintf(bp, " src-ip6"); 1490 print_ip6(bp, insntod(cmd, ip6)); 1491 break; 1492 case O_IP6_DST: 1493 case O_IP6_DST_MASK: 1494 case O_IP6_DST_ME: 1495 if (state->flags & HAVE_DSTIP) 1496 bprintf(bp, " dst-ip6"); 1497 print_ip6(bp, insntod(cmd, ip6)); 1498 break; 1499 case O_FLOW6ID: 1500 print_flow6id(bp, insntod(cmd, u32)); 1501 break; 1502 case O_IP_DSTPORT: 1503 case O_IP_SRCPORT: 1504 print_newports(bp, insntod(cmd, u16), state->proto, 1505 (state->flags & (HAVE_SRCIP | HAVE_DSTIP)) == 1506 (HAVE_SRCIP | HAVE_DSTIP) ? cmd->opcode: 0); 1507 break; 1508 case O_PROTO: 1509 pe = getprotobynumber(cmd->arg1); 1510 if (state->flags & HAVE_PROTO) 1511 bprintf(bp, " proto"); 1512 if (pe != NULL) 1513 bprintf(bp, " %s", pe->p_name); 1514 else 1515 bprintf(bp, " %u", cmd->arg1); 1516 state->proto = cmd->arg1; 1517 break; 1518 case O_MACADDR2: 1519 print_mac(bp, insntod(cmd, mac)); 1520 break; 1521 case O_MAC_TYPE: 1522 print_newports(bp, insntod(cmd, u16), 1523 IPPROTO_ETHERTYPE, cmd->opcode); 1524 break; 1525 case O_FRAG: 1526 bprintf(bp, " frag"); 1527 break; 1528 case O_FIB: 1529 bprintf(bp, " fib %u", cmd->arg1); 1530 break; 1531 case O_SOCKARG: 1532 bprintf(bp, " sockarg"); 1533 break; 1534 case O_IN: 1535 bprintf(bp, cmd->len & F_NOT ? " out" : " in"); 1536 break; 1537 case O_DIVERTED: 1538 switch (cmd->arg1) { 1539 case 3: 1540 bprintf(bp, " diverted"); 1541 break; 1542 case 2: 1543 bprintf(bp, " diverted-output"); 1544 break; 1545 case 1: 1546 bprintf(bp, " diverted-loopback"); 1547 break; 1548 default: 1549 bprintf(bp, " diverted-?<%u>", cmd->arg1); 1550 break; 1551 } 1552 break; 1553 case O_LAYER2: 1554 bprintf(bp, " layer2"); 1555 break; 1556 case O_XMIT: 1557 case O_RECV: 1558 case O_VIA: 1559 if (cmd->opcode == O_XMIT) 1560 s = "xmit"; 1561 else if (cmd->opcode == O_RECV) 1562 s = "recv"; 1563 else /* if (cmd->opcode == O_VIA) */ 1564 s = "via"; 1565 switch (insntod(cmd, if)->name[0]) { 1566 case '\0': 1567 bprintf(bp, " %s %s", s, 1568 inet_ntoa(insntod(cmd, if)->p.ip)); 1569 break; 1570 case '\1': 1571 bprintf(bp, " %s table(%s)", s, 1572 table_search_ctlv(fo->tstate, 1573 insntod(cmd, if)->p.kidx)); 1574 break; 1575 default: 1576 bprintf(bp, " %s %s", s, 1577 insntod(cmd, if)->name); 1578 } 1579 break; 1580 case O_IP_FLOW_LOOKUP: 1581 s = table_search_ctlv(fo->tstate, cmd->arg1); 1582 bprintf(bp, " flow table(%s", s); 1583 if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_u32)) 1584 bprintf(bp, ",%u", insntod(cmd, u32)->d[0]); 1585 bprintf(bp, ")"); 1586 break; 1587 case O_IPID: 1588 case O_IPTTL: 1589 case O_IPLEN: 1590 case O_TCPDATALEN: 1591 case O_TCPWIN: 1592 if (F_LEN(cmd) == 1) { 1593 switch (cmd->opcode) { 1594 case O_IPID: 1595 s = "ipid"; 1596 break; 1597 case O_IPTTL: 1598 s = "ipttl"; 1599 break; 1600 case O_IPLEN: 1601 s = "iplen"; 1602 break; 1603 case O_TCPDATALEN: 1604 s = "tcpdatalen"; 1605 break; 1606 case O_TCPWIN: 1607 s = "tcpwin"; 1608 break; 1609 } 1610 bprintf(bp, " %s %u", s, cmd->arg1); 1611 } else 1612 print_newports(bp, insntod(cmd, u16), 0, 1613 cmd->opcode); 1614 break; 1615 case O_IPVER: 1616 bprintf(bp, " ipver %u", cmd->arg1); 1617 break; 1618 case O_IPPRECEDENCE: 1619 bprintf(bp, " ipprecedence %u", cmd->arg1 >> 5); 1620 break; 1621 case O_DSCP: 1622 print_dscp(bp, insntod(cmd, u32)); 1623 break; 1624 case O_IPOPT: 1625 print_flags(bp, "ipoptions", cmd, f_ipopts); 1626 break; 1627 case O_IPTOS: 1628 print_flags(bp, "iptos", cmd, f_iptos); 1629 break; 1630 case O_ICMPTYPE: 1631 print_icmptypes(bp, insntod(cmd, u32)); 1632 break; 1633 case O_ESTAB: 1634 bprintf(bp, " established"); 1635 break; 1636 case O_TCPFLAGS: 1637 print_flags(bp, "tcpflags", cmd, f_tcpflags); 1638 break; 1639 case O_TCPOPTS: 1640 print_flags(bp, "tcpoptions", cmd, f_tcpopts); 1641 break; 1642 case O_TCPACK: 1643 bprintf(bp, " tcpack %d", 1644 ntohl(insntod(cmd, u32)->d[0])); 1645 break; 1646 case O_TCPSEQ: 1647 bprintf(bp, " tcpseq %d", 1648 ntohl(insntod(cmd, u32)->d[0])); 1649 break; 1650 case O_UID: 1651 pwd = getpwuid(insntod(cmd, u32)->d[0]); 1652 if (pwd != NULL) 1653 bprintf(bp, " uid %s", pwd->pw_name); 1654 else 1655 bprintf(bp, " uid %u", 1656 insntod(cmd, u32)->d[0]); 1657 break; 1658 case O_GID: 1659 grp = getgrgid(insntod(cmd, u32)->d[0]); 1660 if (grp != NULL) 1661 bprintf(bp, " gid %s", grp->gr_name); 1662 else 1663 bprintf(bp, " gid %u", 1664 insntod(cmd, u32)->d[0]); 1665 break; 1666 case O_JAIL: 1667 bprintf(bp, " jail %d", insntod(cmd, u32)->d[0]); 1668 break; 1669 case O_VERREVPATH: 1670 bprintf(bp, " verrevpath"); 1671 break; 1672 case O_VERSRCREACH: 1673 bprintf(bp, " versrcreach"); 1674 break; 1675 case O_ANTISPOOF: 1676 bprintf(bp, " antispoof"); 1677 break; 1678 case O_IPSEC: 1679 bprintf(bp, " ipsec"); 1680 break; 1681 case O_NOP: 1682 bprintf(bp, " // %s", (char *)(cmd + 1)); 1683 break; 1684 case O_KEEP_STATE: 1685 if (state->flags & HAVE_PROBE_STATE) 1686 bprintf(bp, " keep-state"); 1687 else 1688 bprintf(bp, " record-state"); 1689 bprintf(bp, " :%s", 1690 object_search_ctlv(fo->tstate, cmd->arg1, 1691 IPFW_TLV_STATE_NAME)); 1692 break; 1693 case O_LIMIT: 1694 if (state->flags & HAVE_PROBE_STATE) 1695 bprintf(bp, " limit"); 1696 else 1697 bprintf(bp, " set-limit"); 1698 print_limit_mask(bp, insntod(cmd, limit)); 1699 bprintf(bp, " :%s", 1700 object_search_ctlv(fo->tstate, cmd->arg1, 1701 IPFW_TLV_STATE_NAME)); 1702 break; 1703 case O_IP6: 1704 bprintf(bp, " ip6"); 1705 break; 1706 case O_IP4: 1707 bprintf(bp, " ip4"); 1708 break; 1709 case O_ICMP6TYPE: 1710 print_icmp6types(bp, insntod(cmd, u32)); 1711 break; 1712 case O_EXT_HDR: 1713 print_ext6hdr(bp, cmd); 1714 break; 1715 case O_TAGGED: 1716 if (F_LEN(cmd) == 1) 1717 bprint_uint_arg(bp, " tagged ", cmd->arg1); 1718 else 1719 print_newports(bp, insntod(cmd, u16), 1720 0, O_TAGGED); 1721 break; 1722 case O_SKIP_ACTION: 1723 bprintf(bp, " defer-immediate-action"); 1724 break; 1725 default: 1726 bprintf(bp, " [opcode %d len %d]", cmd->opcode, 1727 cmd->len); 1728 } 1729 if (cmd->len & F_OR) { 1730 bprintf(bp, " or"); 1731 state->or_block = 1; 1732 } else if (state->or_block != 0) { 1733 bprintf(bp, " }"); 1734 state->or_block = 0; 1735 } 1736 mark_printed(state, cmd); 1737 1738 return (1); 1739 } 1740 1741 static ipfw_insn * 1742 print_opcode(struct buf_pr *bp, struct format_opts *fo, 1743 struct show_state *state, int opcode) 1744 { 1745 ipfw_insn *cmd; 1746 int l; 1747 1748 for (l = state->rule->act_ofs, cmd = state->rule->cmd; 1749 l > 0; l -= F_LEN(cmd), cmd += F_LEN(cmd)) { 1750 /* We use zero opcode to print the rest of options */ 1751 if (opcode >= 0 && cmd->opcode != opcode) 1752 continue; 1753 /* 1754 * Skip O_NOP, when we printing the rest 1755 * of options, it will be handled separately. 1756 */ 1757 if (cmd->opcode == O_NOP && opcode != O_NOP) 1758 continue; 1759 if (!print_instruction(bp, fo, state, cmd)) 1760 continue; 1761 return (cmd); 1762 } 1763 return (NULL); 1764 } 1765 1766 static void 1767 print_fwd(struct buf_pr *bp, const ipfw_insn *cmd) 1768 { 1769 char buf[INET6_ADDRSTRLEN + IF_NAMESIZE + 2]; 1770 ipfw_insn_sa6 *sa6; 1771 ipfw_insn_sa *sa; 1772 uint16_t port; 1773 1774 if (cmd->opcode == O_FORWARD_IP) { 1775 sa = insntod(cmd, sa); 1776 port = sa->sa.sin_port; 1777 if (sa->sa.sin_addr.s_addr == INADDR_ANY) 1778 bprintf(bp, "fwd tablearg"); 1779 else 1780 bprintf(bp, "fwd %s", inet_ntoa(sa->sa.sin_addr)); 1781 } else { 1782 sa6 = insntod(cmd, sa6); 1783 port = sa6->sa.sin6_port; 1784 bprintf(bp, "fwd "); 1785 if (getnameinfo((const struct sockaddr *)&sa6->sa, 1786 sizeof(struct sockaddr_in6), buf, sizeof(buf), NULL, 0, 1787 NI_NUMERICHOST) == 0) 1788 bprintf(bp, "%s", buf); 1789 } 1790 if (port != 0) 1791 bprintf(bp, ",%u", port); 1792 } 1793 1794 static int 1795 print_action_instruction(struct buf_pr *bp, const struct format_opts *fo, 1796 struct show_state *state, const ipfw_insn *cmd) 1797 { 1798 const char *s; 1799 1800 if (is_printed_opcode(state, cmd)) 1801 return (0); 1802 switch (cmd->opcode) { 1803 case O_CHECK_STATE: 1804 bprintf(bp, "check-state"); 1805 if (cmd->arg1 != 0) 1806 s = object_search_ctlv(fo->tstate, cmd->arg1, 1807 IPFW_TLV_STATE_NAME); 1808 else 1809 s = NULL; 1810 bprintf(bp, " :%s", s ? s: "any"); 1811 break; 1812 case O_ACCEPT: 1813 bprintf(bp, "allow"); 1814 break; 1815 case O_COUNT: 1816 bprintf(bp, "count"); 1817 break; 1818 case O_DENY: 1819 bprintf(bp, "deny"); 1820 break; 1821 case O_REJECT: 1822 if (cmd->arg1 == ICMP_REJECT_RST) 1823 bprintf(bp, "reset"); 1824 else if (cmd->arg1 == ICMP_REJECT_ABORT) 1825 bprintf(bp, "abort"); 1826 else if (cmd->arg1 == ICMP_UNREACH_HOST) 1827 bprintf(bp, "reject"); 1828 else 1829 print_reject_code(bp, cmd->arg1); 1830 break; 1831 case O_UNREACH6: 1832 if (cmd->arg1 == ICMP6_UNREACH_RST) 1833 bprintf(bp, "reset6"); 1834 else if (cmd->arg1 == ICMP6_UNREACH_ABORT) 1835 bprintf(bp, "abort6"); 1836 else 1837 print_unreach6_code(bp, cmd->arg1); 1838 break; 1839 case O_SKIPTO: 1840 bprint_uint_arg(bp, "skipto ", cmd->arg1); 1841 break; 1842 case O_PIPE: 1843 bprint_uint_arg(bp, "pipe ", cmd->arg1); 1844 break; 1845 case O_QUEUE: 1846 bprint_uint_arg(bp, "queue ", cmd->arg1); 1847 break; 1848 case O_DIVERT: 1849 bprint_uint_arg(bp, "divert ", cmd->arg1); 1850 break; 1851 case O_TEE: 1852 bprint_uint_arg(bp, "tee ", cmd->arg1); 1853 break; 1854 case O_NETGRAPH: 1855 bprint_uint_arg(bp, "netgraph ", cmd->arg1); 1856 break; 1857 case O_NGTEE: 1858 bprint_uint_arg(bp, "ngtee ", cmd->arg1); 1859 break; 1860 case O_FORWARD_IP: 1861 case O_FORWARD_IP6: 1862 print_fwd(bp, cmd); 1863 break; 1864 case O_LOG: 1865 if (insntod(cmd, log)->max_log > 0) 1866 bprintf(bp, " log logamount %d", 1867 insntod(cmd, log)->max_log); 1868 else 1869 bprintf(bp, " log"); 1870 break; 1871 case O_ALTQ: 1872 #ifndef NO_ALTQ 1873 print_altq_cmd(bp, insntod(cmd, altq)); 1874 #endif 1875 break; 1876 case O_TAG: 1877 bprint_uint_arg(bp, cmd->len & F_NOT ? " untag ": 1878 " tag ", cmd->arg1); 1879 break; 1880 case O_NAT: 1881 if (cmd->arg1 != IP_FW_NAT44_GLOBAL) 1882 bprint_uint_arg(bp, "nat ", cmd->arg1); 1883 else 1884 bprintf(bp, "nat global"); 1885 break; 1886 case O_SETFIB: 1887 if (cmd->arg1 == IP_FW_TARG) 1888 bprint_uint_arg(bp, "setfib ", cmd->arg1); 1889 else 1890 bprintf(bp, "setfib %u", cmd->arg1 & 0x7FFF); 1891 break; 1892 case O_EXTERNAL_ACTION: 1893 /* 1894 * The external action can consists of two following 1895 * each other opcodes - O_EXTERNAL_ACTION and 1896 * O_EXTERNAL_INSTANCE. The first contains the ID of 1897 * name of external action. The second contains the ID 1898 * of name of external action instance. 1899 * NOTE: in case when external action has no named 1900 * instances support, the second opcode isn't needed. 1901 */ 1902 state->eaction = cmd; 1903 s = object_search_ctlv(fo->tstate, cmd->arg1, 1904 IPFW_TLV_EACTION); 1905 if (match_token(rule_eactions, s) != -1) 1906 bprintf(bp, "%s", s); 1907 else 1908 bprintf(bp, "eaction %s", s); 1909 break; 1910 case O_EXTERNAL_INSTANCE: 1911 if (state->eaction == NULL) 1912 break; 1913 /* 1914 * XXX: we need to teach ipfw(9) to rewrite opcodes 1915 * in the user buffer on rule addition. When we add 1916 * the rule, we specify zero TLV type for 1917 * O_EXTERNAL_INSTANCE object. To show correct 1918 * rule after `ipfw add` we need to search instance 1919 * name with zero type. But when we do `ipfw show` 1920 * we calculate TLV type using IPFW_TLV_EACTION_NAME() 1921 * macro. 1922 */ 1923 s = object_search_ctlv(fo->tstate, cmd->arg1, 0); 1924 if (s == NULL) 1925 s = object_search_ctlv(fo->tstate, 1926 cmd->arg1, IPFW_TLV_EACTION_NAME( 1927 state->eaction->arg1)); 1928 bprintf(bp, " %s", s); 1929 break; 1930 case O_EXTERNAL_DATA: 1931 if (state->eaction == NULL) 1932 break; 1933 /* 1934 * Currently we support data formatting only for 1935 * external data with datalen u16. For unknown data 1936 * print its size in bytes. 1937 */ 1938 if (cmd->len == F_INSN_SIZE(ipfw_insn)) 1939 bprintf(bp, " %u", cmd->arg1); 1940 else 1941 bprintf(bp, " %ubytes", 1942 cmd->len * sizeof(uint32_t)); 1943 break; 1944 case O_SETDSCP: 1945 if (cmd->arg1 == IP_FW_TARG) { 1946 bprintf(bp, "setdscp tablearg"); 1947 break; 1948 } 1949 s = match_value(f_ipdscp, cmd->arg1 & 0x3F); 1950 if (s != NULL) 1951 bprintf(bp, "setdscp %s", s); 1952 else 1953 bprintf(bp, "setdscp %u", cmd->arg1 & 0x3F); 1954 break; 1955 case O_REASS: 1956 bprintf(bp, "reass"); 1957 break; 1958 case O_CALLRETURN: 1959 if (cmd->len & F_NOT) 1960 bprintf(bp, "return"); 1961 else 1962 bprint_uint_arg(bp, "call ", cmd->arg1); 1963 break; 1964 default: 1965 bprintf(bp, "** unrecognized action %d len %d ", 1966 cmd->opcode, cmd->len); 1967 } 1968 mark_printed(state, cmd); 1969 1970 return (1); 1971 } 1972 1973 1974 static ipfw_insn * 1975 print_action(struct buf_pr *bp, struct format_opts *fo, 1976 struct show_state *state, uint8_t opcode) 1977 { 1978 ipfw_insn *cmd; 1979 int l; 1980 1981 for (l = state->rule->cmd_len - state->rule->act_ofs, 1982 cmd = ACTION_PTR(state->rule); l > 0; 1983 l -= F_LEN(cmd), cmd += F_LEN(cmd)) { 1984 if (cmd->opcode != opcode) 1985 continue; 1986 if (!print_action_instruction(bp, fo, state, cmd)) 1987 continue; 1988 return (cmd); 1989 } 1990 return (NULL); 1991 } 1992 1993 static void 1994 print_proto(struct buf_pr *bp, struct format_opts *fo, 1995 struct show_state *state) 1996 { 1997 ipfw_insn *cmd; 1998 int l, proto, ip4, ip6; 1999 2000 /* Count all O_PROTO, O_IP4, O_IP6 instructions. */ 2001 proto = ip4 = ip6 = 0; 2002 for (l = state->rule->act_ofs, cmd = state->rule->cmd; 2003 l > 0; l -= F_LEN(cmd), cmd += F_LEN(cmd)) { 2004 switch (cmd->opcode) { 2005 case O_PROTO: 2006 proto++; 2007 break; 2008 case O_IP4: 2009 ip4 = 1; 2010 if (cmd->len & F_OR) 2011 ip4++; 2012 break; 2013 case O_IP6: 2014 ip6 = 1; 2015 if (cmd->len & F_OR) 2016 ip6++; 2017 break; 2018 default: 2019 continue; 2020 } 2021 } 2022 if (proto == 0 && ip4 == 0 && ip6 == 0) { 2023 state->proto = IPPROTO_IP; 2024 state->flags |= HAVE_PROTO; 2025 bprintf(bp, " ip"); 2026 return; 2027 } 2028 /* To handle the case { ip4 or ip6 }, print opcode with F_OR first */ 2029 cmd = NULL; 2030 if (ip4 || ip6) 2031 cmd = print_opcode(bp, fo, state, ip4 > ip6 ? O_IP4: O_IP6); 2032 if (cmd != NULL && (cmd->len & F_OR)) 2033 cmd = print_opcode(bp, fo, state, ip4 > ip6 ? O_IP6: O_IP4); 2034 if (cmd == NULL || (cmd->len & F_OR)) 2035 for (l = proto; l > 0; l--) { 2036 cmd = print_opcode(bp, fo, state, O_PROTO); 2037 if (cmd == NULL || (cmd->len & F_OR) == 0) 2038 break; 2039 } 2040 /* Initialize proto, it is used by print_newports() */ 2041 state->flags |= HAVE_PROTO; 2042 if (state->proto == 0 && ip6 != 0) 2043 state->proto = IPPROTO_IPV6; 2044 } 2045 2046 static int 2047 match_opcode(int opcode, const int opcodes[], size_t nops) 2048 { 2049 int i; 2050 2051 for (i = 0; i < nops; i++) 2052 if (opcode == opcodes[i]) 2053 return (1); 2054 return (0); 2055 } 2056 2057 static void 2058 print_address(struct buf_pr *bp, struct format_opts *fo, 2059 struct show_state *state, const int opcodes[], size_t nops, int portop, 2060 int flag) 2061 { 2062 ipfw_insn *cmd; 2063 int count, l, portcnt, pf; 2064 2065 count = portcnt = 0; 2066 for (l = state->rule->act_ofs, cmd = state->rule->cmd; 2067 l > 0; l -= F_LEN(cmd), cmd += F_LEN(cmd)) { 2068 if (match_opcode(cmd->opcode, opcodes, nops)) 2069 count++; 2070 else if (cmd->opcode == portop) 2071 portcnt++; 2072 } 2073 if (count == 0) 2074 bprintf(bp, " any"); 2075 for (l = state->rule->act_ofs, cmd = state->rule->cmd; 2076 l > 0 && count > 0; l -= F_LEN(cmd), cmd += F_LEN(cmd)) { 2077 if (!match_opcode(cmd->opcode, opcodes, nops)) 2078 continue; 2079 print_instruction(bp, fo, state, cmd); 2080 if ((cmd->len & F_OR) == 0) 2081 break; 2082 count--; 2083 } 2084 /* 2085 * If several O_IP_?PORT opcodes specified, leave them to the 2086 * options section. 2087 */ 2088 if (portcnt == 1) { 2089 for (l = state->rule->act_ofs, cmd = state->rule->cmd, pf = 0; 2090 l > 0; l -= F_LEN(cmd), cmd += F_LEN(cmd)) { 2091 if (cmd->opcode != portop) { 2092 pf = (cmd->len & F_OR); 2093 continue; 2094 } 2095 /* Print opcode iff it is not in OR block. */ 2096 if (pf == 0 && (cmd->len & F_OR) == 0) 2097 print_instruction(bp, fo, state, cmd); 2098 break; 2099 } 2100 } 2101 state->flags |= flag; 2102 } 2103 2104 static const int action_opcodes[] = { 2105 O_CHECK_STATE, O_ACCEPT, O_COUNT, O_DENY, O_REJECT, 2106 O_UNREACH6, O_SKIPTO, O_PIPE, O_QUEUE, O_DIVERT, O_TEE, 2107 O_NETGRAPH, O_NGTEE, O_FORWARD_IP, O_FORWARD_IP6, O_NAT, 2108 O_SETFIB, O_SETDSCP, O_REASS, O_CALLRETURN, 2109 /* keep the following opcodes at the end of the list */ 2110 O_EXTERNAL_ACTION, O_EXTERNAL_INSTANCE, O_EXTERNAL_DATA 2111 }; 2112 2113 static const int modifier_opcodes[] = { 2114 O_LOG, O_ALTQ, O_TAG 2115 }; 2116 2117 static const int src_opcodes[] = { 2118 O_IP_SRC, O_IP_SRC_LOOKUP, O_IP_SRC_MASK, O_IP_SRC_ME, 2119 O_IP_SRC_SET, O_IP6_SRC, O_IP6_SRC_MASK, O_IP6_SRC_ME 2120 }; 2121 2122 static const int dst_opcodes[] = { 2123 O_IP_DST, O_IP_DST_LOOKUP, O_IP_DST_MASK, O_IP_DST_ME, 2124 O_IP_DST_SET, O_IP6_DST, O_IP6_DST_MASK, O_IP6_DST_ME 2125 }; 2126 2127 static void 2128 show_static_rule(struct cmdline_opts *co, struct format_opts *fo, 2129 struct buf_pr *bp, struct ip_fw_rule *rule, struct ip_fw_bcounter *cntr) 2130 { 2131 struct show_state state; 2132 ipfw_insn *cmd; 2133 static int twidth = 0; 2134 int i; 2135 2136 /* Print # DISABLED or skip the rule */ 2137 if ((fo->set_mask & (1 << rule->set)) == 0) { 2138 /* disabled mask */ 2139 if (!co->show_sets) 2140 return; 2141 else 2142 bprintf(bp, "# DISABLED "); 2143 } 2144 if (init_show_state(&state, rule) != 0) { 2145 warn("init_show_state() failed"); 2146 return; 2147 } 2148 bprintf(bp, "%05u ", rule->rulenum); 2149 2150 /* Print counters if enabled */ 2151 if (fo->pcwidth > 0 || fo->bcwidth > 0) { 2152 pr_u64(bp, &cntr->pcnt, fo->pcwidth); 2153 pr_u64(bp, &cntr->bcnt, fo->bcwidth); 2154 } 2155 2156 /* Print timestamp */ 2157 if (co->do_time == TIMESTAMP_NUMERIC) 2158 bprintf(bp, "%10u ", cntr->timestamp); 2159 else if (co->do_time == TIMESTAMP_STRING) { 2160 char timestr[30]; 2161 time_t t = (time_t)0; 2162 2163 if (twidth == 0) { 2164 strcpy(timestr, ctime(&t)); 2165 *strchr(timestr, '\n') = '\0'; 2166 twidth = strlen(timestr); 2167 } 2168 if (cntr->timestamp > 0) { 2169 t = _long_to_time(cntr->timestamp); 2170 2171 strcpy(timestr, ctime(&t)); 2172 *strchr(timestr, '\n') = '\0'; 2173 bprintf(bp, "%s ", timestr); 2174 } else { 2175 bprintf(bp, "%*s", twidth, " "); 2176 } 2177 } 2178 2179 /* Print set number */ 2180 if (co->show_sets) 2181 bprintf(bp, "set %d ", rule->set); 2182 2183 /* Print the optional "match probability" */ 2184 cmd = print_opcode(bp, fo, &state, O_PROB); 2185 /* Print rule action */ 2186 for (i = 0; i < nitems(action_opcodes); i++) { 2187 cmd = print_action(bp, fo, &state, action_opcodes[i]); 2188 if (cmd == NULL) 2189 continue; 2190 /* Handle special cases */ 2191 switch (cmd->opcode) { 2192 case O_CHECK_STATE: 2193 goto end; 2194 case O_EXTERNAL_ACTION: 2195 case O_EXTERNAL_INSTANCE: 2196 /* External action can have several instructions */ 2197 continue; 2198 } 2199 break; 2200 } 2201 /* Print rule modifiers */ 2202 for (i = 0; i < nitems(modifier_opcodes); i++) 2203 print_action(bp, fo, &state, modifier_opcodes[i]); 2204 /* 2205 * Print rule body 2206 */ 2207 if (co->comment_only != 0) 2208 goto end; 2209 2210 if (rule->flags & IPFW_RULE_JUSTOPTS) { 2211 state.flags |= HAVE_PROTO | HAVE_SRCIP | HAVE_DSTIP; 2212 goto justopts; 2213 } 2214 2215 print_proto(bp, fo, &state); 2216 2217 /* Print source */ 2218 bprintf(bp, " from"); 2219 print_address(bp, fo, &state, src_opcodes, nitems(src_opcodes), 2220 O_IP_SRCPORT, HAVE_SRCIP); 2221 2222 /* Print destination */ 2223 bprintf(bp, " to"); 2224 print_address(bp, fo, &state, dst_opcodes, nitems(dst_opcodes), 2225 O_IP_DSTPORT, HAVE_DSTIP); 2226 2227 justopts: 2228 /* Print the rest of options */ 2229 while (print_opcode(bp, fo, &state, -1)) 2230 ; 2231 end: 2232 /* Print comment at the end */ 2233 cmd = print_opcode(bp, fo, &state, O_NOP); 2234 if (co->comment_only != 0 && cmd == NULL) 2235 bprintf(bp, " // ..."); 2236 bprintf(bp, "\n"); 2237 free_show_state(&state); 2238 } 2239 2240 static void 2241 show_dyn_state(struct cmdline_opts *co, struct format_opts *fo, 2242 struct buf_pr *bp, ipfw_dyn_rule *d) 2243 { 2244 struct protoent *pe; 2245 struct in_addr a; 2246 uint16_t rulenum; 2247 char buf[INET6_ADDRSTRLEN]; 2248 2249 if (d->expire == 0 && d->dyn_type != O_LIMIT_PARENT) 2250 return; 2251 2252 bcopy(&d->rule, &rulenum, sizeof(rulenum)); 2253 bprintf(bp, "%05d", rulenum); 2254 if (fo->pcwidth > 0 || fo->bcwidth > 0) { 2255 bprintf(bp, " "); 2256 pr_u64(bp, &d->pcnt, fo->pcwidth); 2257 pr_u64(bp, &d->bcnt, fo->bcwidth); 2258 bprintf(bp, "(%ds)", d->expire); 2259 } 2260 switch (d->dyn_type) { 2261 case O_LIMIT_PARENT: 2262 bprintf(bp, " PARENT %d", d->count); 2263 break; 2264 case O_LIMIT: 2265 bprintf(bp, " LIMIT"); 2266 break; 2267 case O_KEEP_STATE: /* bidir, no mask */ 2268 bprintf(bp, " STATE"); 2269 break; 2270 } 2271 2272 if ((pe = getprotobynumber(d->id.proto)) != NULL) 2273 bprintf(bp, " %s", pe->p_name); 2274 else 2275 bprintf(bp, " proto %u", d->id.proto); 2276 2277 if (d->id.addr_type == 4) { 2278 a.s_addr = htonl(d->id.src_ip); 2279 bprintf(bp, " %s %d", inet_ntoa(a), d->id.src_port); 2280 2281 a.s_addr = htonl(d->id.dst_ip); 2282 bprintf(bp, " <-> %s %d", inet_ntoa(a), d->id.dst_port); 2283 } else if (d->id.addr_type == 6) { 2284 bprintf(bp, " %s %d", inet_ntop(AF_INET6, &d->id.src_ip6, buf, 2285 sizeof(buf)), d->id.src_port); 2286 bprintf(bp, " <-> %s %d", inet_ntop(AF_INET6, &d->id.dst_ip6, 2287 buf, sizeof(buf)), d->id.dst_port); 2288 } else 2289 bprintf(bp, " UNKNOWN <-> UNKNOWN"); 2290 if (d->kidx != 0) 2291 bprintf(bp, " :%s", object_search_ctlv(fo->tstate, 2292 d->kidx, IPFW_TLV_STATE_NAME)); 2293 2294 #define BOTH_SYN (TH_SYN | (TH_SYN << 8)) 2295 #define BOTH_FIN (TH_FIN | (TH_FIN << 8)) 2296 if (co->verbose) { 2297 bprintf(bp, " state 0x%08x%s", d->state, 2298 d->state ? " ": ","); 2299 if (d->state & IPFW_DYN_ORPHANED) 2300 bprintf(bp, "ORPHANED,"); 2301 if ((d->state & BOTH_SYN) == BOTH_SYN) 2302 bprintf(bp, "BOTH_SYN,"); 2303 else { 2304 if (d->state & TH_SYN) 2305 bprintf(bp, "F_SYN,"); 2306 if (d->state & (TH_SYN << 8)) 2307 bprintf(bp, "R_SYN,"); 2308 } 2309 if ((d->state & BOTH_FIN) == BOTH_FIN) 2310 bprintf(bp, "BOTH_FIN,"); 2311 else { 2312 if (d->state & TH_FIN) 2313 bprintf(bp, "F_FIN,"); 2314 if (d->state & (TH_FIN << 8)) 2315 bprintf(bp, "R_FIN,"); 2316 } 2317 bprintf(bp, " f_ack 0x%x, r_ack 0x%x", d->ack_fwd, 2318 d->ack_rev); 2319 } 2320 } 2321 2322 static int 2323 do_range_cmd(int cmd, ipfw_range_tlv *rt) 2324 { 2325 ipfw_range_header rh; 2326 size_t sz; 2327 2328 memset(&rh, 0, sizeof(rh)); 2329 memcpy(&rh.range, rt, sizeof(*rt)); 2330 rh.range.head.length = sizeof(*rt); 2331 rh.range.head.type = IPFW_TLV_RANGE; 2332 sz = sizeof(rh); 2333 2334 if (do_get3(cmd, &rh.opheader, &sz) != 0) 2335 return (-1); 2336 /* Save number of matched objects */ 2337 rt->new_set = rh.range.new_set; 2338 return (0); 2339 } 2340 2341 /* 2342 * This one handles all set-related commands 2343 * ipfw set { show | enable | disable } 2344 * ipfw set swap X Y 2345 * ipfw set move X to Y 2346 * ipfw set move rule X to Y 2347 */ 2348 void 2349 ipfw_sets_handler(char *av[]) 2350 { 2351 ipfw_range_tlv rt; 2352 char *msg; 2353 size_t size; 2354 uint32_t masks[2]; 2355 int i; 2356 uint16_t rulenum; 2357 uint8_t cmd; 2358 2359 av++; 2360 memset(&rt, 0, sizeof(rt)); 2361 2362 if (av[0] == NULL) 2363 errx(EX_USAGE, "set needs command"); 2364 if (_substrcmp(*av, "show") == 0) { 2365 struct format_opts fo; 2366 ipfw_cfg_lheader *cfg; 2367 2368 memset(&fo, 0, sizeof(fo)); 2369 if (ipfw_get_config(&co, &fo, &cfg, &size) != 0) 2370 err(EX_OSERR, "requesting config failed"); 2371 2372 for (i = 0, msg = "disable"; i < RESVD_SET; i++) 2373 if ((cfg->set_mask & (1<<i)) == 0) { 2374 printf("%s %d", msg, i); 2375 msg = ""; 2376 } 2377 msg = (cfg->set_mask != (uint32_t)-1) ? " enable" : "enable"; 2378 for (i = 0; i < RESVD_SET; i++) 2379 if ((cfg->set_mask & (1<<i)) != 0) { 2380 printf("%s %d", msg, i); 2381 msg = ""; 2382 } 2383 printf("\n"); 2384 free(cfg); 2385 } else if (_substrcmp(*av, "swap") == 0) { 2386 av++; 2387 if ( av[0] == NULL || av[1] == NULL ) 2388 errx(EX_USAGE, "set swap needs 2 set numbers\n"); 2389 rt.set = atoi(av[0]); 2390 rt.new_set = atoi(av[1]); 2391 if (!isdigit(*(av[0])) || rt.set > RESVD_SET) 2392 errx(EX_DATAERR, "invalid set number %s\n", av[0]); 2393 if (!isdigit(*(av[1])) || rt.new_set > RESVD_SET) 2394 errx(EX_DATAERR, "invalid set number %s\n", av[1]); 2395 i = do_range_cmd(IP_FW_SET_SWAP, &rt); 2396 } else if (_substrcmp(*av, "move") == 0) { 2397 av++; 2398 if (av[0] && _substrcmp(*av, "rule") == 0) { 2399 rt.flags = IPFW_RCFLAG_RANGE; /* move rules to new set */ 2400 cmd = IP_FW_XMOVE; 2401 av++; 2402 } else 2403 cmd = IP_FW_SET_MOVE; /* Move set to new one */ 2404 if (av[0] == NULL || av[1] == NULL || av[2] == NULL || 2405 av[3] != NULL || _substrcmp(av[1], "to") != 0) 2406 errx(EX_USAGE, "syntax: set move [rule] X to Y\n"); 2407 rulenum = atoi(av[0]); 2408 rt.new_set = atoi(av[2]); 2409 if (cmd == IP_FW_XMOVE) { 2410 rt.start_rule = rulenum; 2411 rt.end_rule = rulenum; 2412 } else 2413 rt.set = rulenum; 2414 rt.new_set = atoi(av[2]); 2415 if (!isdigit(*(av[0])) || (cmd == 3 && rt.set > RESVD_SET) || 2416 (cmd == 2 && rt.start_rule == IPFW_DEFAULT_RULE) ) 2417 errx(EX_DATAERR, "invalid source number %s\n", av[0]); 2418 if (!isdigit(*(av[2])) || rt.new_set > RESVD_SET) 2419 errx(EX_DATAERR, "invalid dest. set %s\n", av[1]); 2420 i = do_range_cmd(cmd, &rt); 2421 if (i < 0) 2422 err(EX_OSERR, "failed to move %s", 2423 cmd == IP_FW_SET_MOVE ? "set": "rule"); 2424 } else if (_substrcmp(*av, "disable") == 0 || 2425 _substrcmp(*av, "enable") == 0 ) { 2426 int which = _substrcmp(*av, "enable") == 0 ? 1 : 0; 2427 2428 av++; 2429 masks[0] = masks[1] = 0; 2430 2431 while (av[0]) { 2432 if (isdigit(**av)) { 2433 i = atoi(*av); 2434 if (i < 0 || i > RESVD_SET) 2435 errx(EX_DATAERR, 2436 "invalid set number %d\n", i); 2437 masks[which] |= (1<<i); 2438 } else if (_substrcmp(*av, "disable") == 0) 2439 which = 0; 2440 else if (_substrcmp(*av, "enable") == 0) 2441 which = 1; 2442 else 2443 errx(EX_DATAERR, 2444 "invalid set command %s\n", *av); 2445 av++; 2446 } 2447 if ( (masks[0] & masks[1]) != 0 ) 2448 errx(EX_DATAERR, 2449 "cannot enable and disable the same set\n"); 2450 2451 rt.set = masks[0]; 2452 rt.new_set = masks[1]; 2453 i = do_range_cmd(IP_FW_SET_ENABLE, &rt); 2454 if (i) 2455 warn("set enable/disable: setsockopt(IP_FW_SET_ENABLE)"); 2456 } else 2457 errx(EX_USAGE, "invalid set command %s\n", *av); 2458 } 2459 2460 void 2461 ipfw_sysctl_handler(char *av[], int which) 2462 { 2463 av++; 2464 2465 if (av[0] == NULL) { 2466 warnx("missing keyword to enable/disable\n"); 2467 } else if (_substrcmp(*av, "firewall") == 0) { 2468 sysctlbyname("net.inet.ip.fw.enable", NULL, 0, 2469 &which, sizeof(which)); 2470 sysctlbyname("net.inet6.ip6.fw.enable", NULL, 0, 2471 &which, sizeof(which)); 2472 } else if (_substrcmp(*av, "one_pass") == 0) { 2473 sysctlbyname("net.inet.ip.fw.one_pass", NULL, 0, 2474 &which, sizeof(which)); 2475 } else if (_substrcmp(*av, "debug") == 0) { 2476 sysctlbyname("net.inet.ip.fw.debug", NULL, 0, 2477 &which, sizeof(which)); 2478 } else if (_substrcmp(*av, "verbose") == 0) { 2479 sysctlbyname("net.inet.ip.fw.verbose", NULL, 0, 2480 &which, sizeof(which)); 2481 } else if (_substrcmp(*av, "dyn_keepalive") == 0) { 2482 sysctlbyname("net.inet.ip.fw.dyn_keepalive", NULL, 0, 2483 &which, sizeof(which)); 2484 #ifndef NO_ALTQ 2485 } else if (_substrcmp(*av, "altq") == 0) { 2486 altq_set_enabled(which); 2487 #endif 2488 } else { 2489 warnx("unrecognize enable/disable keyword: %s\n", *av); 2490 } 2491 } 2492 2493 typedef void state_cb(struct cmdline_opts *co, struct format_opts *fo, 2494 void *arg, void *state); 2495 2496 static void 2497 prepare_format_dyn(struct cmdline_opts *co, struct format_opts *fo, 2498 void *arg, void *_state) 2499 { 2500 ipfw_dyn_rule *d; 2501 int width; 2502 uint8_t set; 2503 2504 d = (ipfw_dyn_rule *)_state; 2505 /* Count _ALL_ states */ 2506 fo->dcnt++; 2507 2508 if (fo->show_counters == 0) 2509 return; 2510 2511 if (co->use_set) { 2512 /* skip states from another set */ 2513 bcopy((char *)&d->rule + sizeof(uint16_t), &set, 2514 sizeof(uint8_t)); 2515 if (set != co->use_set - 1) 2516 return; 2517 } 2518 2519 width = pr_u64(NULL, &d->pcnt, 0); 2520 if (width > fo->pcwidth) 2521 fo->pcwidth = width; 2522 2523 width = pr_u64(NULL, &d->bcnt, 0); 2524 if (width > fo->bcwidth) 2525 fo->bcwidth = width; 2526 } 2527 2528 static int 2529 foreach_state(struct cmdline_opts *co, struct format_opts *fo, 2530 caddr_t base, size_t sz, state_cb dyn_bc, void *dyn_arg) 2531 { 2532 int ttype; 2533 state_cb *fptr; 2534 void *farg; 2535 ipfw_obj_tlv *tlv; 2536 ipfw_obj_ctlv *ctlv; 2537 2538 fptr = NULL; 2539 ttype = 0; 2540 2541 while (sz > 0) { 2542 ctlv = (ipfw_obj_ctlv *)base; 2543 switch (ctlv->head.type) { 2544 case IPFW_TLV_DYNSTATE_LIST: 2545 base += sizeof(*ctlv); 2546 sz -= sizeof(*ctlv); 2547 ttype = IPFW_TLV_DYN_ENT; 2548 fptr = dyn_bc; 2549 farg = dyn_arg; 2550 break; 2551 default: 2552 return (sz); 2553 } 2554 2555 while (sz > 0) { 2556 tlv = (ipfw_obj_tlv *)base; 2557 if (tlv->type != ttype) 2558 break; 2559 2560 fptr(co, fo, farg, tlv + 1); 2561 sz -= tlv->length; 2562 base += tlv->length; 2563 } 2564 } 2565 2566 return (sz); 2567 } 2568 2569 static void 2570 prepare_format_opts(struct cmdline_opts *co, struct format_opts *fo, 2571 ipfw_obj_tlv *rtlv, int rcnt, caddr_t dynbase, size_t dynsz) 2572 { 2573 int bcwidth, pcwidth, width; 2574 int n; 2575 struct ip_fw_bcounter *cntr; 2576 struct ip_fw_rule *r; 2577 2578 bcwidth = 0; 2579 pcwidth = 0; 2580 if (fo->show_counters != 0) { 2581 for (n = 0; n < rcnt; n++, 2582 rtlv = (ipfw_obj_tlv *)((caddr_t)rtlv + rtlv->length)) { 2583 cntr = (struct ip_fw_bcounter *)(rtlv + 1); 2584 r = (struct ip_fw_rule *)((caddr_t)cntr + cntr->size); 2585 /* skip rules from another set */ 2586 if (co->use_set && r->set != co->use_set - 1) 2587 continue; 2588 2589 /* packet counter */ 2590 width = pr_u64(NULL, &cntr->pcnt, 0); 2591 if (width > pcwidth) 2592 pcwidth = width; 2593 2594 /* byte counter */ 2595 width = pr_u64(NULL, &cntr->bcnt, 0); 2596 if (width > bcwidth) 2597 bcwidth = width; 2598 } 2599 } 2600 fo->bcwidth = bcwidth; 2601 fo->pcwidth = pcwidth; 2602 2603 fo->dcnt = 0; 2604 if (co->do_dynamic && dynsz > 0) 2605 foreach_state(co, fo, dynbase, dynsz, prepare_format_dyn, NULL); 2606 } 2607 2608 static int 2609 list_static_range(struct cmdline_opts *co, struct format_opts *fo, 2610 struct buf_pr *bp, ipfw_obj_tlv *rtlv, int rcnt) 2611 { 2612 int n, seen; 2613 struct ip_fw_rule *r; 2614 struct ip_fw_bcounter *cntr; 2615 int c = 0; 2616 2617 for (n = seen = 0; n < rcnt; n++, 2618 rtlv = (ipfw_obj_tlv *)((caddr_t)rtlv + rtlv->length)) { 2619 2620 if ((fo->show_counters | fo->show_time) != 0) { 2621 cntr = (struct ip_fw_bcounter *)(rtlv + 1); 2622 r = (struct ip_fw_rule *)((caddr_t)cntr + cntr->size); 2623 } else { 2624 cntr = NULL; 2625 r = (struct ip_fw_rule *)(rtlv + 1); 2626 } 2627 if (r->rulenum > fo->last) 2628 break; 2629 if (co->use_set && r->set != co->use_set - 1) 2630 continue; 2631 if (r->rulenum >= fo->first && r->rulenum <= fo->last) { 2632 show_static_rule(co, fo, bp, r, cntr); 2633 printf("%s", bp->buf); 2634 c += rtlv->length; 2635 bp_flush(bp); 2636 seen++; 2637 } 2638 } 2639 2640 return (seen); 2641 } 2642 2643 static void 2644 list_dyn_state(struct cmdline_opts *co, struct format_opts *fo, 2645 void *_arg, void *_state) 2646 { 2647 uint16_t rulenum; 2648 uint8_t set; 2649 ipfw_dyn_rule *d; 2650 struct buf_pr *bp; 2651 2652 d = (ipfw_dyn_rule *)_state; 2653 bp = (struct buf_pr *)_arg; 2654 2655 bcopy(&d->rule, &rulenum, sizeof(rulenum)); 2656 if (rulenum > fo->last) 2657 return; 2658 if (co->use_set) { 2659 bcopy((char *)&d->rule + sizeof(uint16_t), 2660 &set, sizeof(uint8_t)); 2661 if (set != co->use_set - 1) 2662 return; 2663 } 2664 if (rulenum >= fo->first) { 2665 show_dyn_state(co, fo, bp, d); 2666 printf("%s\n", bp->buf); 2667 bp_flush(bp); 2668 } 2669 } 2670 2671 static int 2672 list_dyn_range(struct cmdline_opts *co, struct format_opts *fo, 2673 struct buf_pr *bp, caddr_t base, size_t sz) 2674 { 2675 2676 sz = foreach_state(co, fo, base, sz, list_dyn_state, bp); 2677 return (sz); 2678 } 2679 2680 void 2681 ipfw_list(int ac, char *av[], int show_counters) 2682 { 2683 ipfw_cfg_lheader *cfg; 2684 struct format_opts sfo; 2685 size_t sz; 2686 int error; 2687 int lac; 2688 char **lav; 2689 uint32_t rnum; 2690 char *endptr; 2691 2692 if (co.test_only) { 2693 fprintf(stderr, "Testing only, list disabled\n"); 2694 return; 2695 } 2696 if (co.do_pipe) { 2697 dummynet_list(ac, av, show_counters); 2698 return; 2699 } 2700 2701 ac--; 2702 av++; 2703 memset(&sfo, 0, sizeof(sfo)); 2704 2705 /* Determine rule range to request */ 2706 if (ac > 0) { 2707 for (lac = ac, lav = av; lac != 0; lac--) { 2708 rnum = strtoul(*lav++, &endptr, 10); 2709 if (sfo.first == 0 || rnum < sfo.first) 2710 sfo.first = rnum; 2711 2712 if (*endptr == '-') 2713 rnum = strtoul(endptr + 1, &endptr, 10); 2714 if (sfo.last == 0 || rnum > sfo.last) 2715 sfo.last = rnum; 2716 } 2717 } 2718 2719 /* get configuraion from kernel */ 2720 cfg = NULL; 2721 sfo.show_counters = show_counters; 2722 sfo.show_time = co.do_time; 2723 if (co.do_dynamic != 2) 2724 sfo.flags |= IPFW_CFG_GET_STATIC; 2725 if (co.do_dynamic != 0) 2726 sfo.flags |= IPFW_CFG_GET_STATES; 2727 if ((sfo.show_counters | sfo.show_time) != 0) 2728 sfo.flags |= IPFW_CFG_GET_COUNTERS; 2729 if (ipfw_get_config(&co, &sfo, &cfg, &sz) != 0) 2730 err(EX_OSERR, "retrieving config failed"); 2731 2732 error = ipfw_show_config(&co, &sfo, cfg, sz, ac, av); 2733 2734 free(cfg); 2735 2736 if (error != EX_OK) 2737 exit(error); 2738 } 2739 2740 static int 2741 ipfw_show_config(struct cmdline_opts *co, struct format_opts *fo, 2742 ipfw_cfg_lheader *cfg, size_t sz, int ac, char *av[]) 2743 { 2744 caddr_t dynbase; 2745 size_t dynsz; 2746 int rcnt; 2747 int exitval = EX_OK; 2748 int lac; 2749 char **lav; 2750 char *endptr; 2751 size_t readsz; 2752 struct buf_pr bp; 2753 ipfw_obj_ctlv *ctlv, *tstate; 2754 ipfw_obj_tlv *rbase; 2755 2756 /* 2757 * Handle tablenames TLV first, if any 2758 */ 2759 tstate = NULL; 2760 rbase = NULL; 2761 dynbase = NULL; 2762 dynsz = 0; 2763 readsz = sizeof(*cfg); 2764 rcnt = 0; 2765 2766 fo->set_mask = cfg->set_mask; 2767 2768 ctlv = (ipfw_obj_ctlv *)(cfg + 1); 2769 if (ctlv->head.type == IPFW_TLV_TBLNAME_LIST) { 2770 object_sort_ctlv(ctlv); 2771 fo->tstate = ctlv; 2772 readsz += ctlv->head.length; 2773 ctlv = (ipfw_obj_ctlv *)((caddr_t)ctlv + ctlv->head.length); 2774 } 2775 2776 if (cfg->flags & IPFW_CFG_GET_STATIC) { 2777 /* We've requested static rules */ 2778 if (ctlv->head.type == IPFW_TLV_RULE_LIST) { 2779 rbase = (ipfw_obj_tlv *)(ctlv + 1); 2780 rcnt = ctlv->count; 2781 readsz += ctlv->head.length; 2782 ctlv = (ipfw_obj_ctlv *)((caddr_t)ctlv + 2783 ctlv->head.length); 2784 } 2785 } 2786 2787 if ((cfg->flags & IPFW_CFG_GET_STATES) && (readsz != sz)) { 2788 /* We may have some dynamic states */ 2789 dynsz = sz - readsz; 2790 /* Skip empty header */ 2791 if (dynsz != sizeof(ipfw_obj_ctlv)) 2792 dynbase = (caddr_t)ctlv; 2793 else 2794 dynsz = 0; 2795 } 2796 2797 prepare_format_opts(co, fo, rbase, rcnt, dynbase, dynsz); 2798 bp_alloc(&bp, 4096); 2799 2800 /* if no rule numbers were specified, list all rules */ 2801 if (ac == 0) { 2802 fo->first = 0; 2803 fo->last = IPFW_DEFAULT_RULE; 2804 if (cfg->flags & IPFW_CFG_GET_STATIC) 2805 list_static_range(co, fo, &bp, rbase, rcnt); 2806 2807 if (co->do_dynamic && dynsz > 0) { 2808 printf("## Dynamic rules (%d %zu):\n", fo->dcnt, 2809 dynsz); 2810 list_dyn_range(co, fo, &bp, dynbase, dynsz); 2811 } 2812 2813 bp_free(&bp); 2814 return (EX_OK); 2815 } 2816 2817 /* display specific rules requested on command line */ 2818 for (lac = ac, lav = av; lac != 0; lac--) { 2819 /* convert command line rule # */ 2820 fo->last = fo->first = strtoul(*lav++, &endptr, 10); 2821 if (*endptr == '-') 2822 fo->last = strtoul(endptr + 1, &endptr, 10); 2823 if (*endptr) { 2824 exitval = EX_USAGE; 2825 warnx("invalid rule number: %s", *(lav - 1)); 2826 continue; 2827 } 2828 2829 if ((cfg->flags & IPFW_CFG_GET_STATIC) == 0) 2830 continue; 2831 2832 if (list_static_range(co, fo, &bp, rbase, rcnt) == 0) { 2833 /* give precedence to other error(s) */ 2834 if (exitval == EX_OK) 2835 exitval = EX_UNAVAILABLE; 2836 if (fo->first == fo->last) 2837 warnx("rule %u does not exist", fo->first); 2838 else 2839 warnx("no rules in range %u-%u", 2840 fo->first, fo->last); 2841 } 2842 } 2843 2844 if (co->do_dynamic && dynsz > 0) { 2845 printf("## Dynamic rules:\n"); 2846 for (lac = ac, lav = av; lac != 0; lac--) { 2847 fo->last = fo->first = strtoul(*lav++, &endptr, 10); 2848 if (*endptr == '-') 2849 fo->last = strtoul(endptr+1, &endptr, 10); 2850 if (*endptr) 2851 /* already warned */ 2852 continue; 2853 list_dyn_range(co, fo, &bp, dynbase, dynsz); 2854 } 2855 } 2856 2857 bp_free(&bp); 2858 return (exitval); 2859 } 2860 2861 2862 /* 2863 * Retrieves current ipfw configuration of given type 2864 * and stores its pointer to @pcfg. 2865 * 2866 * Caller is responsible for freeing @pcfg. 2867 * 2868 * Returns 0 on success. 2869 */ 2870 2871 static int 2872 ipfw_get_config(struct cmdline_opts *co, struct format_opts *fo, 2873 ipfw_cfg_lheader **pcfg, size_t *psize) 2874 { 2875 ipfw_cfg_lheader *cfg; 2876 size_t sz; 2877 int i; 2878 2879 2880 if (co->test_only != 0) { 2881 fprintf(stderr, "Testing only, list disabled\n"); 2882 return (0); 2883 } 2884 2885 /* Start with some data size */ 2886 sz = 4096; 2887 cfg = NULL; 2888 2889 for (i = 0; i < 16; i++) { 2890 if (cfg != NULL) 2891 free(cfg); 2892 if ((cfg = calloc(1, sz)) == NULL) 2893 return (ENOMEM); 2894 2895 cfg->flags = fo->flags; 2896 cfg->start_rule = fo->first; 2897 cfg->end_rule = fo->last; 2898 2899 if (do_get3(IP_FW_XGET, &cfg->opheader, &sz) != 0) { 2900 if (errno != ENOMEM) { 2901 free(cfg); 2902 return (errno); 2903 } 2904 2905 /* Buffer size is not enough. Try to increase */ 2906 sz = sz * 2; 2907 if (sz < cfg->size) 2908 sz = cfg->size; 2909 continue; 2910 } 2911 2912 *pcfg = cfg; 2913 *psize = sz; 2914 return (0); 2915 } 2916 2917 free(cfg); 2918 return (ENOMEM); 2919 } 2920 2921 static int 2922 lookup_host (char *host, struct in_addr *ipaddr) 2923 { 2924 struct hostent *he; 2925 2926 if (!inet_aton(host, ipaddr)) { 2927 if ((he = gethostbyname(host)) == NULL) 2928 return(-1); 2929 *ipaddr = *(struct in_addr *)he->h_addr_list[0]; 2930 } 2931 return(0); 2932 } 2933 2934 struct tidx { 2935 ipfw_obj_ntlv *idx; 2936 uint32_t count; 2937 uint32_t size; 2938 uint16_t counter; 2939 uint8_t set; 2940 }; 2941 2942 int 2943 ipfw_check_object_name(const char *name) 2944 { 2945 int c, i, l; 2946 2947 /* 2948 * Check that name is null-terminated and contains 2949 * valid symbols only. Valid mask is: 2950 * [a-zA-Z0-9\-_\.]{1,63} 2951 */ 2952 l = strlen(name); 2953 if (l == 0 || l >= 64) 2954 return (EINVAL); 2955 for (i = 0; i < l; i++) { 2956 c = name[i]; 2957 if (isalpha(c) || isdigit(c) || c == '_' || 2958 c == '-' || c == '.') 2959 continue; 2960 return (EINVAL); 2961 } 2962 return (0); 2963 } 2964 2965 static char *default_state_name = "default"; 2966 static int 2967 state_check_name(const char *name) 2968 { 2969 2970 if (ipfw_check_object_name(name) != 0) 2971 return (EINVAL); 2972 if (strcmp(name, "any") == 0) 2973 return (EINVAL); 2974 return (0); 2975 } 2976 2977 static int 2978 eaction_check_name(const char *name) 2979 { 2980 2981 if (ipfw_check_object_name(name) != 0) 2982 return (EINVAL); 2983 /* Restrict some 'special' names */ 2984 if (match_token(rule_actions, name) != -1 && 2985 match_token(rule_action_params, name) != -1) 2986 return (EINVAL); 2987 return (0); 2988 } 2989 2990 static uint16_t 2991 pack_object(struct tidx *tstate, char *name, int otype) 2992 { 2993 int i; 2994 ipfw_obj_ntlv *ntlv; 2995 2996 for (i = 0; i < tstate->count; i++) { 2997 if (strcmp(tstate->idx[i].name, name) != 0) 2998 continue; 2999 if (tstate->idx[i].set != tstate->set) 3000 continue; 3001 if (tstate->idx[i].head.type != otype) 3002 continue; 3003 3004 return (tstate->idx[i].idx); 3005 } 3006 3007 if (tstate->count + 1 > tstate->size) { 3008 tstate->size += 4; 3009 tstate->idx = realloc(tstate->idx, tstate->size * 3010 sizeof(ipfw_obj_ntlv)); 3011 if (tstate->idx == NULL) 3012 return (0); 3013 } 3014 3015 ntlv = &tstate->idx[i]; 3016 memset(ntlv, 0, sizeof(ipfw_obj_ntlv)); 3017 strlcpy(ntlv->name, name, sizeof(ntlv->name)); 3018 ntlv->head.type = otype; 3019 ntlv->head.length = sizeof(ipfw_obj_ntlv); 3020 ntlv->set = tstate->set; 3021 ntlv->idx = ++tstate->counter; 3022 tstate->count++; 3023 3024 return (ntlv->idx); 3025 } 3026 3027 static uint16_t 3028 pack_table(struct tidx *tstate, char *name) 3029 { 3030 3031 if (table_check_name(name) != 0) 3032 return (0); 3033 3034 return (pack_object(tstate, name, IPFW_TLV_TBL_NAME)); 3035 } 3036 3037 void 3038 fill_table(struct _ipfw_insn *cmd, char *av, uint8_t opcode, 3039 struct tidx *tstate) 3040 { 3041 uint32_t *d = ((ipfw_insn_u32 *)cmd)->d; 3042 uint16_t uidx; 3043 char *p; 3044 3045 if ((p = strchr(av + 6, ')')) == NULL) 3046 errx(EX_DATAERR, "forgotten parenthesis: '%s'", av); 3047 *p = '\0'; 3048 p = strchr(av + 6, ','); 3049 if (p) 3050 *p++ = '\0'; 3051 3052 if ((uidx = pack_table(tstate, av + 6)) == 0) 3053 errx(EX_DATAERR, "Invalid table name: %s", av + 6); 3054 3055 cmd->opcode = opcode; 3056 cmd->arg1 = uidx; 3057 if (p) { 3058 cmd->len |= F_INSN_SIZE(ipfw_insn_u32); 3059 d[0] = strtoul(p, NULL, 0); 3060 } else 3061 cmd->len |= F_INSN_SIZE(ipfw_insn); 3062 } 3063 3064 3065 /* 3066 * fills the addr and mask fields in the instruction as appropriate from av. 3067 * Update length as appropriate. 3068 * The following formats are allowed: 3069 * me returns O_IP_*_ME 3070 * 1.2.3.4 single IP address 3071 * 1.2.3.4:5.6.7.8 address:mask 3072 * 1.2.3.4/24 address/mask 3073 * 1.2.3.4/26{1,6,5,4,23} set of addresses in a subnet 3074 * We can have multiple comma-separated address/mask entries. 3075 */ 3076 static void 3077 fill_ip(ipfw_insn_ip *cmd, char *av, int cblen, struct tidx *tstate) 3078 { 3079 int len = 0; 3080 uint32_t *d = ((ipfw_insn_u32 *)cmd)->d; 3081 3082 cmd->o.len &= ~F_LEN_MASK; /* zero len */ 3083 3084 if (_substrcmp(av, "any") == 0) 3085 return; 3086 3087 if (_substrcmp(av, "me") == 0) { 3088 cmd->o.len |= F_INSN_SIZE(ipfw_insn); 3089 return; 3090 } 3091 3092 if (strncmp(av, "table(", 6) == 0) { 3093 fill_table(&cmd->o, av, O_IP_DST_LOOKUP, tstate); 3094 return; 3095 } 3096 3097 while (av) { 3098 /* 3099 * After the address we can have '/' or ':' indicating a mask, 3100 * ',' indicating another address follows, '{' indicating a 3101 * set of addresses of unspecified size. 3102 */ 3103 char *t = NULL, *p = strpbrk(av, "/:,{"); 3104 int masklen; 3105 char md, nd = '\0'; 3106 3107 CHECK_LENGTH(cblen, F_INSN_SIZE(ipfw_insn) + 2 + len); 3108 3109 if (p) { 3110 md = *p; 3111 *p++ = '\0'; 3112 if ((t = strpbrk(p, ",{")) != NULL) { 3113 nd = *t; 3114 *t = '\0'; 3115 } 3116 } else 3117 md = '\0'; 3118 3119 if (lookup_host(av, (struct in_addr *)&d[0]) != 0) 3120 errx(EX_NOHOST, "hostname ``%s'' unknown", av); 3121 switch (md) { 3122 case ':': 3123 if (!inet_aton(p, (struct in_addr *)&d[1])) 3124 errx(EX_DATAERR, "bad netmask ``%s''", p); 3125 break; 3126 case '/': 3127 masklen = atoi(p); 3128 if (masklen == 0) 3129 d[1] = htonl(0U); /* mask */ 3130 else if (masklen > 32) 3131 errx(EX_DATAERR, "bad width ``%s''", p); 3132 else 3133 d[1] = htonl(~0U << (32 - masklen)); 3134 break; 3135 case '{': /* no mask, assume /24 and put back the '{' */ 3136 d[1] = htonl(~0U << (32 - 24)); 3137 *(--p) = md; 3138 break; 3139 3140 case ',': /* single address plus continuation */ 3141 *(--p) = md; 3142 /* FALLTHROUGH */ 3143 case 0: /* initialization value */ 3144 default: 3145 d[1] = htonl(~0U); /* force /32 */ 3146 break; 3147 } 3148 d[0] &= d[1]; /* mask base address with mask */ 3149 if (t) 3150 *t = nd; 3151 /* find next separator */ 3152 if (p) 3153 p = strpbrk(p, ",{"); 3154 if (p && *p == '{') { 3155 /* 3156 * We have a set of addresses. They are stored as follows: 3157 * arg1 is the set size (powers of 2, 2..256) 3158 * addr is the base address IN HOST FORMAT 3159 * mask.. is an array of arg1 bits (rounded up to 3160 * the next multiple of 32) with bits set 3161 * for each host in the map. 3162 */ 3163 uint32_t *map = (uint32_t *)&cmd->mask; 3164 int low, high; 3165 int i = contigmask((uint8_t *)&(d[1]), 32); 3166 3167 if (len > 0) 3168 errx(EX_DATAERR, "address set cannot be in a list"); 3169 if (i < 24 || i > 31) 3170 errx(EX_DATAERR, "invalid set with mask %d\n", i); 3171 cmd->o.arg1 = 1<<(32-i); /* map length */ 3172 d[0] = ntohl(d[0]); /* base addr in host format */ 3173 cmd->o.opcode = O_IP_DST_SET; /* default */ 3174 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32) + (cmd->o.arg1+31)/32; 3175 for (i = 0; i < (cmd->o.arg1+31)/32 ; i++) 3176 map[i] = 0; /* clear map */ 3177 3178 av = p + 1; 3179 low = d[0] & 0xff; 3180 high = low + cmd->o.arg1 - 1; 3181 /* 3182 * Here, i stores the previous value when we specify a range 3183 * of addresses within a mask, e.g. 45-63. i = -1 means we 3184 * have no previous value. 3185 */ 3186 i = -1; /* previous value in a range */ 3187 while (isdigit(*av)) { 3188 char *s; 3189 int a = strtol(av, &s, 0); 3190 3191 if (s == av) { /* no parameter */ 3192 if (*av != '}') 3193 errx(EX_DATAERR, "set not closed\n"); 3194 if (i != -1) 3195 errx(EX_DATAERR, "incomplete range %d-", i); 3196 break; 3197 } 3198 if (a < low || a > high) 3199 errx(EX_DATAERR, "addr %d out of range [%d-%d]\n", 3200 a, low, high); 3201 a -= low; 3202 if (i == -1) /* no previous in range */ 3203 i = a; 3204 else { /* check that range is valid */ 3205 if (i > a) 3206 errx(EX_DATAERR, "invalid range %d-%d", 3207 i+low, a+low); 3208 if (*s == '-') 3209 errx(EX_DATAERR, "double '-' in range"); 3210 } 3211 for (; i <= a; i++) 3212 map[i/32] |= 1<<(i & 31); 3213 i = -1; 3214 if (*s == '-') 3215 i = a; 3216 else if (*s == '}') 3217 break; 3218 av = s+1; 3219 } 3220 return; 3221 } 3222 av = p; 3223 if (av) /* then *av must be a ',' */ 3224 av++; 3225 3226 /* Check this entry */ 3227 if (d[1] == 0) { /* "any", specified as x.x.x.x/0 */ 3228 /* 3229 * 'any' turns the entire list into a NOP. 3230 * 'not any' never matches, so it is removed from the 3231 * list unless it is the only item, in which case we 3232 * report an error. 3233 */ 3234 if (cmd->o.len & F_NOT) { /* "not any" never matches */ 3235 if (av == NULL && len == 0) /* only this entry */ 3236 errx(EX_DATAERR, "not any never matches"); 3237 } 3238 /* else do nothing and skip this entry */ 3239 return; 3240 } 3241 /* A single IP can be stored in an optimized format */ 3242 if (d[1] == (uint32_t)~0 && av == NULL && len == 0) { 3243 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32); 3244 return; 3245 } 3246 len += 2; /* two words... */ 3247 d += 2; 3248 } /* end while */ 3249 if (len + 1 > F_LEN_MASK) 3250 errx(EX_DATAERR, "address list too long"); 3251 cmd->o.len |= len+1; 3252 } 3253 3254 3255 /* n2mask sets n bits of the mask */ 3256 void 3257 n2mask(struct in6_addr *mask, int n) 3258 { 3259 static int minimask[9] = 3260 { 0x00, 0x80, 0xc0, 0xe0, 0xf0, 0xf8, 0xfc, 0xfe, 0xff }; 3261 u_char *p; 3262 3263 memset(mask, 0, sizeof(struct in6_addr)); 3264 p = (u_char *) mask; 3265 for (; n > 0; p++, n -= 8) { 3266 if (n >= 8) 3267 *p = 0xff; 3268 else 3269 *p = minimask[n]; 3270 } 3271 return; 3272 } 3273 3274 static void 3275 fill_flags_cmd(ipfw_insn *cmd, enum ipfw_opcodes opcode, 3276 struct _s_x *flags, char *p) 3277 { 3278 char *e; 3279 uint32_t set = 0, clear = 0; 3280 3281 if (fill_flags(flags, p, &e, &set, &clear) != 0) 3282 errx(EX_DATAERR, "invalid flag %s", e); 3283 3284 cmd->opcode = opcode; 3285 cmd->len = (cmd->len & (F_NOT | F_OR)) | 1; 3286 cmd->arg1 = (set & 0xff) | ( (clear & 0xff) << 8); 3287 } 3288 3289 3290 void 3291 ipfw_delete(char *av[]) 3292 { 3293 ipfw_range_tlv rt; 3294 char *sep; 3295 int i, j; 3296 int exitval = EX_OK; 3297 int do_set = 0; 3298 3299 av++; 3300 NEED1("missing rule specification"); 3301 if ( *av && _substrcmp(*av, "set") == 0) { 3302 /* Do not allow using the following syntax: 3303 * ipfw set N delete set M 3304 */ 3305 if (co.use_set) 3306 errx(EX_DATAERR, "invalid syntax"); 3307 do_set = 1; /* delete set */ 3308 av++; 3309 } 3310 3311 /* Rule number */ 3312 while (*av && isdigit(**av)) { 3313 i = strtol(*av, &sep, 10); 3314 j = i; 3315 if (*sep== '-') 3316 j = strtol(sep + 1, NULL, 10); 3317 av++; 3318 if (co.do_nat) { 3319 exitval = do_cmd(IP_FW_NAT_DEL, &i, sizeof i); 3320 if (exitval) { 3321 exitval = EX_UNAVAILABLE; 3322 if (co.do_quiet) 3323 continue; 3324 warn("nat %u not available", i); 3325 } 3326 } else if (co.do_pipe) { 3327 exitval = ipfw_delete_pipe(co.do_pipe, i); 3328 } else { 3329 memset(&rt, 0, sizeof(rt)); 3330 if (do_set != 0) { 3331 rt.set = i & 31; 3332 rt.flags = IPFW_RCFLAG_SET; 3333 } else { 3334 rt.start_rule = i & 0xffff; 3335 rt.end_rule = j & 0xffff; 3336 if (rt.start_rule == 0 && rt.end_rule == 0) 3337 rt.flags |= IPFW_RCFLAG_ALL; 3338 else 3339 rt.flags |= IPFW_RCFLAG_RANGE; 3340 if (co.use_set != 0) { 3341 rt.set = co.use_set - 1; 3342 rt.flags |= IPFW_RCFLAG_SET; 3343 } 3344 } 3345 if (co.do_dynamic == 2) 3346 rt.flags |= IPFW_RCFLAG_DYNAMIC; 3347 i = do_range_cmd(IP_FW_XDEL, &rt); 3348 if (i != 0) { 3349 exitval = EX_UNAVAILABLE; 3350 if (co.do_quiet) 3351 continue; 3352 warn("rule %u: setsockopt(IP_FW_XDEL)", 3353 rt.start_rule); 3354 } else if (rt.new_set == 0 && do_set == 0 && 3355 co.do_dynamic != 2) { 3356 exitval = EX_UNAVAILABLE; 3357 if (co.do_quiet) 3358 continue; 3359 if (rt.start_rule != rt.end_rule) 3360 warnx("no rules rules in %u-%u range", 3361 rt.start_rule, rt.end_rule); 3362 else 3363 warnx("rule %u not found", 3364 rt.start_rule); 3365 } 3366 } 3367 } 3368 if (exitval != EX_OK && co.do_force == 0) 3369 exit(exitval); 3370 } 3371 3372 3373 /* 3374 * fill the interface structure. We do not check the name as we can 3375 * create interfaces dynamically, so checking them at insert time 3376 * makes relatively little sense. 3377 * Interface names containing '*', '?', or '[' are assumed to be shell 3378 * patterns which match interfaces. 3379 */ 3380 static void 3381 fill_iface(ipfw_insn_if *cmd, char *arg, int cblen, struct tidx *tstate) 3382 { 3383 char *p; 3384 uint16_t uidx; 3385 3386 cmd->name[0] = '\0'; 3387 cmd->o.len |= F_INSN_SIZE(ipfw_insn_if); 3388 3389 CHECK_CMDLEN; 3390 3391 /* Parse the interface or address */ 3392 if (strcmp(arg, "any") == 0) 3393 cmd->o.len = 0; /* effectively ignore this command */ 3394 else if (strncmp(arg, "table(", 6) == 0) { 3395 if ((p = strchr(arg + 6, ')')) == NULL) 3396 errx(EX_DATAERR, "forgotten parenthesis: '%s'", arg); 3397 *p = '\0'; 3398 p = strchr(arg + 6, ','); 3399 if (p) 3400 *p++ = '\0'; 3401 if ((uidx = pack_table(tstate, arg + 6)) == 0) 3402 errx(EX_DATAERR, "Invalid table name: %s", arg + 6); 3403 3404 cmd->name[0] = '\1'; /* Special value indicating table */ 3405 cmd->p.kidx = uidx; 3406 } else if (!isdigit(*arg)) { 3407 strlcpy(cmd->name, arg, sizeof(cmd->name)); 3408 cmd->p.glob = strpbrk(arg, "*?[") != NULL ? 1 : 0; 3409 } else if (!inet_aton(arg, &cmd->p.ip)) 3410 errx(EX_DATAERR, "bad ip address ``%s''", arg); 3411 } 3412 3413 static void 3414 get_mac_addr_mask(const char *p, uint8_t *addr, uint8_t *mask) 3415 { 3416 int i; 3417 size_t l; 3418 char *ap, *ptr, *optr; 3419 struct ether_addr *mac; 3420 const char *macset = "0123456789abcdefABCDEF:"; 3421 3422 if (strcmp(p, "any") == 0) { 3423 for (i = 0; i < ETHER_ADDR_LEN; i++) 3424 addr[i] = mask[i] = 0; 3425 return; 3426 } 3427 3428 optr = ptr = strdup(p); 3429 if ((ap = strsep(&ptr, "&/")) != NULL && *ap != 0) { 3430 l = strlen(ap); 3431 if (strspn(ap, macset) != l || (mac = ether_aton(ap)) == NULL) 3432 errx(EX_DATAERR, "Incorrect MAC address"); 3433 bcopy(mac, addr, ETHER_ADDR_LEN); 3434 } else 3435 errx(EX_DATAERR, "Incorrect MAC address"); 3436 3437 if (ptr != NULL) { /* we have mask? */ 3438 if (p[ptr - optr - 1] == '/') { /* mask len */ 3439 long ml = strtol(ptr, &ap, 10); 3440 if (*ap != 0 || ml > ETHER_ADDR_LEN * 8 || ml < 0) 3441 errx(EX_DATAERR, "Incorrect mask length"); 3442 for (i = 0; ml > 0 && i < ETHER_ADDR_LEN; ml -= 8, i++) 3443 mask[i] = (ml >= 8) ? 0xff: (~0) << (8 - ml); 3444 } else { /* mask */ 3445 l = strlen(ptr); 3446 if (strspn(ptr, macset) != l || 3447 (mac = ether_aton(ptr)) == NULL) 3448 errx(EX_DATAERR, "Incorrect mask"); 3449 bcopy(mac, mask, ETHER_ADDR_LEN); 3450 } 3451 } else { /* default mask: ff:ff:ff:ff:ff:ff */ 3452 for (i = 0; i < ETHER_ADDR_LEN; i++) 3453 mask[i] = 0xff; 3454 } 3455 for (i = 0; i < ETHER_ADDR_LEN; i++) 3456 addr[i] &= mask[i]; 3457 3458 free(optr); 3459 } 3460 3461 /* 3462 * helper function, updates the pointer to cmd with the length 3463 * of the current command, and also cleans up the first word of 3464 * the new command in case it has been clobbered before. 3465 */ 3466 static ipfw_insn * 3467 next_cmd(ipfw_insn *cmd, int *len) 3468 { 3469 *len -= F_LEN(cmd); 3470 CHECK_LENGTH(*len, 0); 3471 cmd += F_LEN(cmd); 3472 bzero(cmd, sizeof(*cmd)); 3473 return cmd; 3474 } 3475 3476 /* 3477 * Takes arguments and copies them into a comment 3478 */ 3479 static void 3480 fill_comment(ipfw_insn *cmd, char **av, int cblen) 3481 { 3482 int i, l; 3483 char *p = (char *)(cmd + 1); 3484 3485 cmd->opcode = O_NOP; 3486 cmd->len = (cmd->len & (F_NOT | F_OR)); 3487 3488 /* Compute length of comment string. */ 3489 for (i = 0, l = 0; av[i] != NULL; i++) 3490 l += strlen(av[i]) + 1; 3491 if (l == 0) 3492 return; 3493 if (l > 84) 3494 errx(EX_DATAERR, 3495 "comment too long (max 80 chars)"); 3496 l = 1 + (l+3)/4; 3497 cmd->len = (cmd->len & (F_NOT | F_OR)) | l; 3498 CHECK_CMDLEN; 3499 3500 for (i = 0; av[i] != NULL; i++) { 3501 strcpy(p, av[i]); 3502 p += strlen(av[i]); 3503 *p++ = ' '; 3504 } 3505 *(--p) = '\0'; 3506 } 3507 3508 /* 3509 * A function to fill simple commands of size 1. 3510 * Existing flags are preserved. 3511 */ 3512 static void 3513 fill_cmd(ipfw_insn *cmd, enum ipfw_opcodes opcode, int flags, uint16_t arg) 3514 { 3515 cmd->opcode = opcode; 3516 cmd->len = ((cmd->len | flags) & (F_NOT | F_OR)) | 1; 3517 cmd->arg1 = arg; 3518 } 3519 3520 /* 3521 * Fetch and add the MAC address and type, with masks. This generates one or 3522 * two microinstructions, and returns the pointer to the last one. 3523 */ 3524 static ipfw_insn * 3525 add_mac(ipfw_insn *cmd, char *av[], int cblen) 3526 { 3527 ipfw_insn_mac *mac; 3528 3529 if ( ( av[0] == NULL ) || ( av[1] == NULL ) ) 3530 errx(EX_DATAERR, "MAC dst src"); 3531 3532 cmd->opcode = O_MACADDR2; 3533 cmd->len = (cmd->len & (F_NOT | F_OR)) | F_INSN_SIZE(ipfw_insn_mac); 3534 CHECK_CMDLEN; 3535 3536 mac = (ipfw_insn_mac *)cmd; 3537 get_mac_addr_mask(av[0], mac->addr, mac->mask); /* dst */ 3538 get_mac_addr_mask(av[1], &(mac->addr[ETHER_ADDR_LEN]), 3539 &(mac->mask[ETHER_ADDR_LEN])); /* src */ 3540 return cmd; 3541 } 3542 3543 static ipfw_insn * 3544 add_mactype(ipfw_insn *cmd, char *av, int cblen) 3545 { 3546 if (!av) 3547 errx(EX_DATAERR, "missing MAC type"); 3548 if (strcmp(av, "any") != 0) { /* we have a non-null type */ 3549 fill_newports((ipfw_insn_u16 *)cmd, av, IPPROTO_ETHERTYPE, 3550 cblen); 3551 cmd->opcode = O_MAC_TYPE; 3552 return cmd; 3553 } else 3554 return NULL; 3555 } 3556 3557 static ipfw_insn * 3558 add_proto0(ipfw_insn *cmd, char *av, u_char *protop) 3559 { 3560 struct protoent *pe; 3561 char *ep; 3562 int proto; 3563 3564 proto = strtol(av, &ep, 10); 3565 if (*ep != '\0' || proto <= 0) { 3566 if ((pe = getprotobyname(av)) == NULL) 3567 return NULL; 3568 proto = pe->p_proto; 3569 } 3570 3571 fill_cmd(cmd, O_PROTO, 0, proto); 3572 *protop = proto; 3573 return cmd; 3574 } 3575 3576 static ipfw_insn * 3577 add_proto(ipfw_insn *cmd, char *av, u_char *protop) 3578 { 3579 u_char proto = IPPROTO_IP; 3580 3581 if (_substrcmp(av, "all") == 0 || strcmp(av, "ip") == 0) 3582 ; /* do not set O_IP4 nor O_IP6 */ 3583 else if (strcmp(av, "ip4") == 0) 3584 /* explicit "just IPv4" rule */ 3585 fill_cmd(cmd, O_IP4, 0, 0); 3586 else if (strcmp(av, "ip6") == 0) { 3587 /* explicit "just IPv6" rule */ 3588 proto = IPPROTO_IPV6; 3589 fill_cmd(cmd, O_IP6, 0, 0); 3590 } else 3591 return add_proto0(cmd, av, protop); 3592 3593 *protop = proto; 3594 return cmd; 3595 } 3596 3597 static ipfw_insn * 3598 add_proto_compat(ipfw_insn *cmd, char *av, u_char *protop) 3599 { 3600 u_char proto = IPPROTO_IP; 3601 3602 if (_substrcmp(av, "all") == 0 || strcmp(av, "ip") == 0) 3603 ; /* do not set O_IP4 nor O_IP6 */ 3604 else if (strcmp(av, "ipv4") == 0 || strcmp(av, "ip4") == 0) 3605 /* explicit "just IPv4" rule */ 3606 fill_cmd(cmd, O_IP4, 0, 0); 3607 else if (strcmp(av, "ipv6") == 0 || strcmp(av, "ip6") == 0) { 3608 /* explicit "just IPv6" rule */ 3609 proto = IPPROTO_IPV6; 3610 fill_cmd(cmd, O_IP6, 0, 0); 3611 } else 3612 return add_proto0(cmd, av, protop); 3613 3614 *protop = proto; 3615 return cmd; 3616 } 3617 3618 static ipfw_insn * 3619 add_srcip(ipfw_insn *cmd, char *av, int cblen, struct tidx *tstate) 3620 { 3621 fill_ip((ipfw_insn_ip *)cmd, av, cblen, tstate); 3622 if (cmd->opcode == O_IP_DST_SET) /* set */ 3623 cmd->opcode = O_IP_SRC_SET; 3624 else if (cmd->opcode == O_IP_DST_LOOKUP) /* table */ 3625 cmd->opcode = O_IP_SRC_LOOKUP; 3626 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn)) /* me */ 3627 cmd->opcode = O_IP_SRC_ME; 3628 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_u32)) /* one IP */ 3629 cmd->opcode = O_IP_SRC; 3630 else /* addr/mask */ 3631 cmd->opcode = O_IP_SRC_MASK; 3632 return cmd; 3633 } 3634 3635 static ipfw_insn * 3636 add_dstip(ipfw_insn *cmd, char *av, int cblen, struct tidx *tstate) 3637 { 3638 fill_ip((ipfw_insn_ip *)cmd, av, cblen, tstate); 3639 if (cmd->opcode == O_IP_DST_SET) /* set */ 3640 ; 3641 else if (cmd->opcode == O_IP_DST_LOOKUP) /* table */ 3642 ; 3643 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn)) /* me */ 3644 cmd->opcode = O_IP_DST_ME; 3645 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_u32)) /* one IP */ 3646 cmd->opcode = O_IP_DST; 3647 else /* addr/mask */ 3648 cmd->opcode = O_IP_DST_MASK; 3649 return cmd; 3650 } 3651 3652 static struct _s_x f_reserved_keywords[] = { 3653 { "altq", TOK_OR }, 3654 { "//", TOK_OR }, 3655 { "diverted", TOK_OR }, 3656 { "dst-port", TOK_OR }, 3657 { "src-port", TOK_OR }, 3658 { "established", TOK_OR }, 3659 { "keep-state", TOK_OR }, 3660 { "frag", TOK_OR }, 3661 { "icmptypes", TOK_OR }, 3662 { "in", TOK_OR }, 3663 { "out", TOK_OR }, 3664 { "ip6", TOK_OR }, 3665 { "any", TOK_OR }, 3666 { "to", TOK_OR }, 3667 { "via", TOK_OR }, 3668 { "{", TOK_OR }, 3669 { NULL, 0 } /* terminator */ 3670 }; 3671 3672 static ipfw_insn * 3673 add_ports(ipfw_insn *cmd, char *av, u_char proto, int opcode, int cblen) 3674 { 3675 3676 if (match_token(f_reserved_keywords, av) != -1) 3677 return (NULL); 3678 3679 if (fill_newports((ipfw_insn_u16 *)cmd, av, proto, cblen)) { 3680 /* XXX todo: check that we have a protocol with ports */ 3681 cmd->opcode = opcode; 3682 return cmd; 3683 } 3684 return NULL; 3685 } 3686 3687 static ipfw_insn * 3688 add_src(ipfw_insn *cmd, char *av, u_char proto, int cblen, struct tidx *tstate) 3689 { 3690 struct in6_addr a; 3691 char *host, *ch, buf[INET6_ADDRSTRLEN]; 3692 ipfw_insn *ret = NULL; 3693 int len; 3694 3695 /* Copy first address in set if needed */ 3696 if ((ch = strpbrk(av, "/,")) != NULL) { 3697 len = ch - av; 3698 strlcpy(buf, av, sizeof(buf)); 3699 if (len < sizeof(buf)) 3700 buf[len] = '\0'; 3701 host = buf; 3702 } else 3703 host = av; 3704 3705 if (proto == IPPROTO_IPV6 || strcmp(av, "me6") == 0 || 3706 inet_pton(AF_INET6, host, &a) == 1) 3707 ret = add_srcip6(cmd, av, cblen, tstate); 3708 /* XXX: should check for IPv4, not !IPv6 */ 3709 if (ret == NULL && (proto == IPPROTO_IP || strcmp(av, "me") == 0 || 3710 inet_pton(AF_INET6, host, &a) != 1)) 3711 ret = add_srcip(cmd, av, cblen, tstate); 3712 if (ret == NULL && strcmp(av, "any") != 0) 3713 ret = cmd; 3714 3715 return ret; 3716 } 3717 3718 static ipfw_insn * 3719 add_dst(ipfw_insn *cmd, char *av, u_char proto, int cblen, struct tidx *tstate) 3720 { 3721 struct in6_addr a; 3722 char *host, *ch, buf[INET6_ADDRSTRLEN]; 3723 ipfw_insn *ret = NULL; 3724 int len; 3725 3726 /* Copy first address in set if needed */ 3727 if ((ch = strpbrk(av, "/,")) != NULL) { 3728 len = ch - av; 3729 strlcpy(buf, av, sizeof(buf)); 3730 if (len < sizeof(buf)) 3731 buf[len] = '\0'; 3732 host = buf; 3733 } else 3734 host = av; 3735 3736 if (proto == IPPROTO_IPV6 || strcmp(av, "me6") == 0 || 3737 inet_pton(AF_INET6, host, &a) == 1) 3738 ret = add_dstip6(cmd, av, cblen, tstate); 3739 /* XXX: should check for IPv4, not !IPv6 */ 3740 if (ret == NULL && (proto == IPPROTO_IP || strcmp(av, "me") == 0 || 3741 inet_pton(AF_INET6, host, &a) != 1)) 3742 ret = add_dstip(cmd, av, cblen, tstate); 3743 if (ret == NULL && strcmp(av, "any") != 0) 3744 ret = cmd; 3745 3746 return ret; 3747 } 3748 3749 /* 3750 * Parse arguments and assemble the microinstructions which make up a rule. 3751 * Rules are added into the 'rulebuf' and then copied in the correct order 3752 * into the actual rule. 3753 * 3754 * The syntax for a rule starts with the action, followed by 3755 * optional action parameters, and the various match patterns. 3756 * In the assembled microcode, the first opcode must be an O_PROBE_STATE 3757 * (generated if the rule includes a keep-state option), then the 3758 * various match patterns, log/altq actions, and the actual action. 3759 * 3760 */ 3761 void 3762 compile_rule(char *av[], uint32_t *rbuf, int *rbufsize, struct tidx *tstate) 3763 { 3764 /* 3765 * rules are added into the 'rulebuf' and then copied in 3766 * the correct order into the actual rule. 3767 * Some things that need to go out of order (prob, action etc.) 3768 * go into actbuf[]. 3769 */ 3770 static uint32_t actbuf[255], cmdbuf[255]; 3771 int rblen, ablen, cblen; 3772 3773 ipfw_insn *src, *dst, *cmd, *action, *prev=NULL; 3774 ipfw_insn *first_cmd; /* first match pattern */ 3775 3776 struct ip_fw_rule *rule; 3777 3778 /* 3779 * various flags used to record that we entered some fields. 3780 */ 3781 ipfw_insn *have_state = NULL; /* any state-related option */ 3782 int have_rstate = 0; 3783 ipfw_insn *have_log = NULL, *have_altq = NULL, *have_tag = NULL; 3784 ipfw_insn *have_skipcmd = NULL; 3785 size_t len; 3786 3787 int i; 3788 3789 int open_par = 0; /* open parenthesis ( */ 3790 3791 /* proto is here because it is used to fetch ports */ 3792 u_char proto = IPPROTO_IP; /* default protocol */ 3793 3794 double match_prob = 1; /* match probability, default is always match */ 3795 3796 bzero(actbuf, sizeof(actbuf)); /* actions go here */ 3797 bzero(cmdbuf, sizeof(cmdbuf)); 3798 bzero(rbuf, *rbufsize); 3799 3800 rule = (struct ip_fw_rule *)rbuf; 3801 cmd = (ipfw_insn *)cmdbuf; 3802 action = (ipfw_insn *)actbuf; 3803 3804 rblen = *rbufsize / sizeof(uint32_t); 3805 rblen -= sizeof(struct ip_fw_rule) / sizeof(uint32_t); 3806 ablen = sizeof(actbuf) / sizeof(actbuf[0]); 3807 cblen = sizeof(cmdbuf) / sizeof(cmdbuf[0]); 3808 cblen -= F_INSN_SIZE(ipfw_insn_u32) + 1; 3809 3810 #define CHECK_RBUFLEN(len) { CHECK_LENGTH(rblen, len); rblen -= len; } 3811 #define CHECK_ACTLEN CHECK_LENGTH(ablen, action->len) 3812 3813 av++; 3814 3815 /* [rule N] -- Rule number optional */ 3816 if (av[0] && isdigit(**av)) { 3817 rule->rulenum = atoi(*av); 3818 av++; 3819 } 3820 3821 /* [set N] -- set number (0..RESVD_SET), optional */ 3822 if (av[0] && av[1] && _substrcmp(*av, "set") == 0) { 3823 int set = strtoul(av[1], NULL, 10); 3824 if (set < 0 || set > RESVD_SET) 3825 errx(EX_DATAERR, "illegal set %s", av[1]); 3826 rule->set = set; 3827 tstate->set = set; 3828 av += 2; 3829 } 3830 3831 /* [prob D] -- match probability, optional */ 3832 if (av[0] && av[1] && _substrcmp(*av, "prob") == 0) { 3833 match_prob = strtod(av[1], NULL); 3834 3835 if (match_prob <= 0 || match_prob > 1) 3836 errx(EX_DATAERR, "illegal match prob. %s", av[1]); 3837 av += 2; 3838 } 3839 3840 /* action -- mandatory */ 3841 NEED1("missing action"); 3842 i = match_token(rule_actions, *av); 3843 av++; 3844 action->len = 1; /* default */ 3845 CHECK_ACTLEN; 3846 switch(i) { 3847 case TOK_CHECKSTATE: 3848 have_state = action; 3849 action->opcode = O_CHECK_STATE; 3850 if (*av == NULL || 3851 match_token(rule_options, *av) == TOK_COMMENT) { 3852 action->arg1 = pack_object(tstate, 3853 default_state_name, IPFW_TLV_STATE_NAME); 3854 break; 3855 } 3856 if (*av[0] == ':') { 3857 if (strcmp(*av + 1, "any") == 0) 3858 action->arg1 = 0; 3859 else if (state_check_name(*av + 1) == 0) 3860 action->arg1 = pack_object(tstate, *av + 1, 3861 IPFW_TLV_STATE_NAME); 3862 else 3863 errx(EX_DATAERR, "Invalid state name %s", 3864 *av); 3865 av++; 3866 break; 3867 } 3868 errx(EX_DATAERR, "Invalid state name %s", *av); 3869 break; 3870 3871 case TOK_ABORT: 3872 action->opcode = O_REJECT; 3873 action->arg1 = ICMP_REJECT_ABORT; 3874 break; 3875 3876 case TOK_ABORT6: 3877 action->opcode = O_UNREACH6; 3878 action->arg1 = ICMP6_UNREACH_ABORT; 3879 break; 3880 3881 case TOK_ACCEPT: 3882 action->opcode = O_ACCEPT; 3883 break; 3884 3885 case TOK_DENY: 3886 action->opcode = O_DENY; 3887 action->arg1 = 0; 3888 break; 3889 3890 case TOK_REJECT: 3891 action->opcode = O_REJECT; 3892 action->arg1 = ICMP_UNREACH_HOST; 3893 break; 3894 3895 case TOK_RESET: 3896 action->opcode = O_REJECT; 3897 action->arg1 = ICMP_REJECT_RST; 3898 break; 3899 3900 case TOK_RESET6: 3901 action->opcode = O_UNREACH6; 3902 action->arg1 = ICMP6_UNREACH_RST; 3903 break; 3904 3905 case TOK_UNREACH: 3906 action->opcode = O_REJECT; 3907 NEED1("missing reject code"); 3908 fill_reject_code(&action->arg1, *av); 3909 av++; 3910 break; 3911 3912 case TOK_UNREACH6: 3913 action->opcode = O_UNREACH6; 3914 NEED1("missing unreach code"); 3915 fill_unreach6_code(&action->arg1, *av); 3916 av++; 3917 break; 3918 3919 case TOK_COUNT: 3920 action->opcode = O_COUNT; 3921 break; 3922 3923 case TOK_NAT: 3924 action->opcode = O_NAT; 3925 action->len = F_INSN_SIZE(ipfw_insn_nat); 3926 CHECK_ACTLEN; 3927 if (*av != NULL && _substrcmp(*av, "global") == 0) { 3928 action->arg1 = IP_FW_NAT44_GLOBAL; 3929 av++; 3930 break; 3931 } else 3932 goto chkarg; 3933 case TOK_QUEUE: 3934 action->opcode = O_QUEUE; 3935 goto chkarg; 3936 case TOK_PIPE: 3937 action->opcode = O_PIPE; 3938 goto chkarg; 3939 case TOK_SKIPTO: 3940 action->opcode = O_SKIPTO; 3941 goto chkarg; 3942 case TOK_NETGRAPH: 3943 action->opcode = O_NETGRAPH; 3944 goto chkarg; 3945 case TOK_NGTEE: 3946 action->opcode = O_NGTEE; 3947 goto chkarg; 3948 case TOK_DIVERT: 3949 action->opcode = O_DIVERT; 3950 goto chkarg; 3951 case TOK_TEE: 3952 action->opcode = O_TEE; 3953 goto chkarg; 3954 case TOK_CALL: 3955 action->opcode = O_CALLRETURN; 3956 chkarg: 3957 if (!av[0]) 3958 errx(EX_USAGE, "missing argument for %s", *(av - 1)); 3959 if (isdigit(**av)) { 3960 action->arg1 = strtoul(*av, NULL, 10); 3961 if (action->arg1 <= 0 || action->arg1 >= IP_FW_TABLEARG) 3962 errx(EX_DATAERR, "illegal argument for %s", 3963 *(av - 1)); 3964 } else if (_substrcmp(*av, "tablearg") == 0) { 3965 action->arg1 = IP_FW_TARG; 3966 } else if (i == TOK_DIVERT || i == TOK_TEE) { 3967 struct servent *s; 3968 setservent(1); 3969 s = getservbyname(av[0], "divert"); 3970 if (s != NULL) 3971 action->arg1 = ntohs(s->s_port); 3972 else 3973 errx(EX_DATAERR, "illegal divert/tee port"); 3974 } else 3975 errx(EX_DATAERR, "illegal argument for %s", *(av - 1)); 3976 av++; 3977 break; 3978 3979 case TOK_FORWARD: { 3980 /* 3981 * Locate the address-port separator (':' or ','). 3982 * Could be one of the following: 3983 * hostname:port 3984 * IPv4 a.b.c.d,port 3985 * IPv4 a.b.c.d:port 3986 * IPv6 w:x:y::z,port 3987 * The ':' can only be used with hostname and IPv4 address. 3988 * XXX-BZ Should we also support [w:x:y::z]:port? 3989 */ 3990 struct sockaddr_storage result; 3991 struct addrinfo *res; 3992 char *s, *end; 3993 int family; 3994 u_short port_number; 3995 3996 NEED1("missing forward address[:port]"); 3997 3998 /* 3999 * locate the address-port separator (':' or ',') 4000 */ 4001 s = strchr(*av, ','); 4002 if (s == NULL) { 4003 /* Distinguish between IPv4:port and IPv6 cases. */ 4004 s = strchr(*av, ':'); 4005 if (s && strchr(s+1, ':')) 4006 s = NULL; /* no port */ 4007 } 4008 4009 port_number = 0; 4010 if (s != NULL) { 4011 /* Terminate host portion and set s to start of port. */ 4012 *(s++) = '\0'; 4013 i = strtoport(s, &end, 0 /* base */, 0 /* proto */); 4014 if (s == end) 4015 errx(EX_DATAERR, 4016 "illegal forwarding port ``%s''", s); 4017 port_number = (u_short)i; 4018 } 4019 4020 if (_substrcmp(*av, "tablearg") == 0) { 4021 family = PF_INET; 4022 ((struct sockaddr_in*)&result)->sin_addr.s_addr = 4023 INADDR_ANY; 4024 } else { 4025 /* 4026 * Resolve the host name or address to a family and a 4027 * network representation of the address. 4028 */ 4029 if (getaddrinfo(*av, NULL, NULL, &res)) 4030 errx(EX_DATAERR, NULL); 4031 /* Just use the first host in the answer. */ 4032 family = res->ai_family; 4033 memcpy(&result, res->ai_addr, res->ai_addrlen); 4034 freeaddrinfo(res); 4035 } 4036 4037 if (family == PF_INET) { 4038 ipfw_insn_sa *p = (ipfw_insn_sa *)action; 4039 4040 action->opcode = O_FORWARD_IP; 4041 action->len = F_INSN_SIZE(ipfw_insn_sa); 4042 CHECK_ACTLEN; 4043 4044 /* 4045 * In the kernel we assume AF_INET and use only 4046 * sin_port and sin_addr. Remember to set sin_len as 4047 * the routing code seems to use it too. 4048 */ 4049 p->sa.sin_len = sizeof(struct sockaddr_in); 4050 p->sa.sin_family = AF_INET; 4051 p->sa.sin_port = port_number; 4052 p->sa.sin_addr.s_addr = 4053 ((struct sockaddr_in *)&result)->sin_addr.s_addr; 4054 } else if (family == PF_INET6) { 4055 ipfw_insn_sa6 *p = (ipfw_insn_sa6 *)action; 4056 4057 action->opcode = O_FORWARD_IP6; 4058 action->len = F_INSN_SIZE(ipfw_insn_sa6); 4059 CHECK_ACTLEN; 4060 4061 p->sa.sin6_len = sizeof(struct sockaddr_in6); 4062 p->sa.sin6_family = AF_INET6; 4063 p->sa.sin6_port = port_number; 4064 p->sa.sin6_flowinfo = 0; 4065 p->sa.sin6_scope_id = 4066 ((struct sockaddr_in6 *)&result)->sin6_scope_id; 4067 bcopy(&((struct sockaddr_in6*)&result)->sin6_addr, 4068 &p->sa.sin6_addr, sizeof(p->sa.sin6_addr)); 4069 } else { 4070 errx(EX_DATAERR, "Invalid address family in forward action"); 4071 } 4072 av++; 4073 break; 4074 } 4075 case TOK_COMMENT: 4076 /* pretend it is a 'count' rule followed by the comment */ 4077 action->opcode = O_COUNT; 4078 av--; /* go back... */ 4079 break; 4080 4081 case TOK_SETFIB: 4082 { 4083 int numfibs; 4084 size_t intsize = sizeof(int); 4085 4086 action->opcode = O_SETFIB; 4087 NEED1("missing fib number"); 4088 if (_substrcmp(*av, "tablearg") == 0) { 4089 action->arg1 = IP_FW_TARG; 4090 } else { 4091 action->arg1 = strtoul(*av, NULL, 10); 4092 if (sysctlbyname("net.fibs", &numfibs, &intsize, 4093 NULL, 0) == -1) 4094 errx(EX_DATAERR, "fibs not suported.\n"); 4095 if (action->arg1 >= numfibs) /* Temporary */ 4096 errx(EX_DATAERR, "fib too large.\n"); 4097 /* Add high-order bit to fib to make room for tablearg*/ 4098 action->arg1 |= 0x8000; 4099 } 4100 av++; 4101 break; 4102 } 4103 4104 case TOK_SETDSCP: 4105 { 4106 int code; 4107 4108 action->opcode = O_SETDSCP; 4109 NEED1("missing DSCP code"); 4110 if (_substrcmp(*av, "tablearg") == 0) { 4111 action->arg1 = IP_FW_TARG; 4112 } else { 4113 if (isalpha(*av[0])) { 4114 if ((code = match_token(f_ipdscp, *av)) == -1) 4115 errx(EX_DATAERR, "Unknown DSCP code"); 4116 action->arg1 = code; 4117 } else 4118 action->arg1 = strtoul(*av, NULL, 10); 4119 /* 4120 * Add high-order bit to DSCP to make room 4121 * for tablearg 4122 */ 4123 action->arg1 |= 0x8000; 4124 } 4125 av++; 4126 break; 4127 } 4128 4129 case TOK_REASS: 4130 action->opcode = O_REASS; 4131 break; 4132 4133 case TOK_RETURN: 4134 fill_cmd(action, O_CALLRETURN, F_NOT, 0); 4135 break; 4136 4137 case TOK_TCPSETMSS: { 4138 u_long mss; 4139 uint16_t idx; 4140 4141 idx = pack_object(tstate, "tcp-setmss", IPFW_TLV_EACTION); 4142 if (idx == 0) 4143 errx(EX_DATAERR, "pack_object failed"); 4144 fill_cmd(action, O_EXTERNAL_ACTION, 0, idx); 4145 NEED1("Missing MSS value"); 4146 action = next_cmd(action, &ablen); 4147 action->len = 1; 4148 CHECK_ACTLEN; 4149 mss = strtoul(*av, NULL, 10); 4150 if (mss == 0 || mss > UINT16_MAX) 4151 errx(EX_USAGE, "invalid MSS value %s", *av); 4152 fill_cmd(action, O_EXTERNAL_DATA, 0, (uint16_t)mss); 4153 av++; 4154 break; 4155 } 4156 4157 default: 4158 av--; 4159 if (match_token(rule_eactions, *av) == -1) 4160 errx(EX_DATAERR, "invalid action %s\n", *av); 4161 /* 4162 * External actions support. 4163 * XXX: we support only syntax with instance name. 4164 * For known external actions (from rule_eactions list) 4165 * we can handle syntax directly. But with `eaction' 4166 * keyword we can use only `eaction <name> <instance>' 4167 * syntax. 4168 */ 4169 case TOK_EACTION: { 4170 uint16_t idx; 4171 4172 NEED1("Missing eaction name"); 4173 if (eaction_check_name(*av) != 0) 4174 errx(EX_DATAERR, "Invalid eaction name %s", *av); 4175 idx = pack_object(tstate, *av, IPFW_TLV_EACTION); 4176 if (idx == 0) 4177 errx(EX_DATAERR, "pack_object failed"); 4178 fill_cmd(action, O_EXTERNAL_ACTION, 0, idx); 4179 av++; 4180 NEED1("Missing eaction instance name"); 4181 action = next_cmd(action, &ablen); 4182 action->len = 1; 4183 CHECK_ACTLEN; 4184 if (eaction_check_name(*av) != 0) 4185 errx(EX_DATAERR, "Invalid eaction instance name %s", 4186 *av); 4187 /* 4188 * External action instance object has TLV type depended 4189 * from the external action name object index. Since we 4190 * currently don't know this index, use zero as TLV type. 4191 */ 4192 idx = pack_object(tstate, *av, 0); 4193 if (idx == 0) 4194 errx(EX_DATAERR, "pack_object failed"); 4195 fill_cmd(action, O_EXTERNAL_INSTANCE, 0, idx); 4196 av++; 4197 } 4198 } 4199 action = next_cmd(action, &ablen); 4200 4201 /* 4202 * [altq queuename] -- altq tag, optional 4203 * [log [logamount N]] -- log, optional 4204 * 4205 * If they exist, it go first in the cmdbuf, but then it is 4206 * skipped in the copy section to the end of the buffer. 4207 */ 4208 while (av[0] != NULL && (i = match_token(rule_action_params, *av)) != -1) { 4209 av++; 4210 switch (i) { 4211 case TOK_LOG: 4212 { 4213 ipfw_insn_log *c = (ipfw_insn_log *)cmd; 4214 int l; 4215 4216 if (have_log) 4217 errx(EX_DATAERR, 4218 "log cannot be specified more than once"); 4219 have_log = (ipfw_insn *)c; 4220 cmd->len = F_INSN_SIZE(ipfw_insn_log); 4221 CHECK_CMDLEN; 4222 cmd->opcode = O_LOG; 4223 if (av[0] && _substrcmp(*av, "logamount") == 0) { 4224 av++; 4225 NEED1("logamount requires argument"); 4226 l = atoi(*av); 4227 if (l < 0) 4228 errx(EX_DATAERR, 4229 "logamount must be positive"); 4230 c->max_log = l; 4231 av++; 4232 } else { 4233 len = sizeof(c->max_log); 4234 if (sysctlbyname("net.inet.ip.fw.verbose_limit", 4235 &c->max_log, &len, NULL, 0) == -1) { 4236 if (co.test_only) { 4237 c->max_log = 0; 4238 break; 4239 } 4240 errx(1, "sysctlbyname(\"%s\")", 4241 "net.inet.ip.fw.verbose_limit"); 4242 } 4243 } 4244 } 4245 break; 4246 4247 #ifndef NO_ALTQ 4248 case TOK_ALTQ: 4249 { 4250 ipfw_insn_altq *a = (ipfw_insn_altq *)cmd; 4251 4252 NEED1("missing altq queue name"); 4253 if (have_altq) 4254 errx(EX_DATAERR, 4255 "altq cannot be specified more than once"); 4256 have_altq = (ipfw_insn *)a; 4257 cmd->len = F_INSN_SIZE(ipfw_insn_altq); 4258 CHECK_CMDLEN; 4259 cmd->opcode = O_ALTQ; 4260 a->qid = altq_name_to_qid(*av); 4261 av++; 4262 } 4263 break; 4264 #endif 4265 4266 case TOK_TAG: 4267 case TOK_UNTAG: { 4268 uint16_t tag; 4269 4270 if (have_tag) 4271 errx(EX_USAGE, "tag and untag cannot be " 4272 "specified more than once"); 4273 GET_UINT_ARG(tag, IPFW_ARG_MIN, IPFW_ARG_MAX, i, 4274 rule_action_params); 4275 have_tag = cmd; 4276 fill_cmd(cmd, O_TAG, (i == TOK_TAG) ? 0: F_NOT, tag); 4277 av++; 4278 break; 4279 } 4280 4281 default: 4282 abort(); 4283 } 4284 cmd = next_cmd(cmd, &cblen); 4285 } 4286 4287 if (have_state) { /* must be a check-state, we are done */ 4288 if (*av != NULL && 4289 match_token(rule_options, *av) == TOK_COMMENT) { 4290 /* check-state has a comment */ 4291 av++; 4292 fill_comment(cmd, av, cblen); 4293 cmd = next_cmd(cmd, &cblen); 4294 av[0] = NULL; 4295 } 4296 goto done; 4297 } 4298 4299 #define OR_START(target) \ 4300 if (av[0] && (*av[0] == '(' || *av[0] == '{')) { \ 4301 if (open_par) \ 4302 errx(EX_USAGE, "nested \"(\" not allowed\n"); \ 4303 prev = NULL; \ 4304 open_par = 1; \ 4305 if ( (av[0])[1] == '\0') { \ 4306 av++; \ 4307 } else \ 4308 (*av)++; \ 4309 } \ 4310 target: \ 4311 4312 4313 #define CLOSE_PAR \ 4314 if (open_par) { \ 4315 if (av[0] && ( \ 4316 strcmp(*av, ")") == 0 || \ 4317 strcmp(*av, "}") == 0)) { \ 4318 prev = NULL; \ 4319 open_par = 0; \ 4320 av++; \ 4321 } else \ 4322 errx(EX_USAGE, "missing \")\"\n"); \ 4323 } 4324 4325 #define NOT_BLOCK \ 4326 if (av[0] && _substrcmp(*av, "not") == 0) { \ 4327 if (cmd->len & F_NOT) \ 4328 errx(EX_USAGE, "double \"not\" not allowed\n"); \ 4329 cmd->len |= F_NOT; \ 4330 av++; \ 4331 } 4332 4333 #define OR_BLOCK(target) \ 4334 if (av[0] && _substrcmp(*av, "or") == 0) { \ 4335 if (prev == NULL || open_par == 0) \ 4336 errx(EX_DATAERR, "invalid OR block"); \ 4337 prev->len |= F_OR; \ 4338 av++; \ 4339 goto target; \ 4340 } \ 4341 CLOSE_PAR; 4342 4343 first_cmd = cmd; 4344 4345 #if 0 4346 /* 4347 * MAC addresses, optional. 4348 * If we have this, we skip the part "proto from src to dst" 4349 * and jump straight to the option parsing. 4350 */ 4351 NOT_BLOCK; 4352 NEED1("missing protocol"); 4353 if (_substrcmp(*av, "MAC") == 0 || 4354 _substrcmp(*av, "mac") == 0) { 4355 av++; /* the "MAC" keyword */ 4356 add_mac(cmd, av); /* exits in case of errors */ 4357 cmd = next_cmd(cmd); 4358 av += 2; /* dst-mac and src-mac */ 4359 NOT_BLOCK; 4360 NEED1("missing mac type"); 4361 if (add_mactype(cmd, av[0])) 4362 cmd = next_cmd(cmd); 4363 av++; /* any or mac-type */ 4364 goto read_options; 4365 } 4366 #endif 4367 4368 /* 4369 * protocol, mandatory 4370 */ 4371 OR_START(get_proto); 4372 NOT_BLOCK; 4373 NEED1("missing protocol"); 4374 if (add_proto_compat(cmd, *av, &proto)) { 4375 av++; 4376 if (F_LEN(cmd) != 0) { 4377 prev = cmd; 4378 cmd = next_cmd(cmd, &cblen); 4379 } 4380 } else if (first_cmd != cmd) { 4381 errx(EX_DATAERR, "invalid protocol ``%s''", *av); 4382 } else { 4383 rule->flags |= IPFW_RULE_JUSTOPTS; 4384 goto read_options; 4385 } 4386 OR_BLOCK(get_proto); 4387 4388 /* 4389 * "from", mandatory 4390 */ 4391 if ((av[0] == NULL) || _substrcmp(*av, "from") != 0) 4392 errx(EX_USAGE, "missing ``from''"); 4393 av++; 4394 4395 /* 4396 * source IP, mandatory 4397 */ 4398 OR_START(source_ip); 4399 NOT_BLOCK; /* optional "not" */ 4400 NEED1("missing source address"); 4401 if (add_src(cmd, *av, proto, cblen, tstate)) { 4402 av++; 4403 if (F_LEN(cmd) != 0) { /* ! any */ 4404 prev = cmd; 4405 cmd = next_cmd(cmd, &cblen); 4406 } 4407 } else 4408 errx(EX_USAGE, "bad source address %s", *av); 4409 OR_BLOCK(source_ip); 4410 4411 /* 4412 * source ports, optional 4413 */ 4414 NOT_BLOCK; /* optional "not" */ 4415 if ( av[0] != NULL ) { 4416 if (_substrcmp(*av, "any") == 0 || 4417 add_ports(cmd, *av, proto, O_IP_SRCPORT, cblen)) { 4418 av++; 4419 if (F_LEN(cmd) != 0) 4420 cmd = next_cmd(cmd, &cblen); 4421 } 4422 } 4423 4424 /* 4425 * "to", mandatory 4426 */ 4427 if ( (av[0] == NULL) || _substrcmp(*av, "to") != 0 ) 4428 errx(EX_USAGE, "missing ``to''"); 4429 av++; 4430 4431 /* 4432 * destination, mandatory 4433 */ 4434 OR_START(dest_ip); 4435 NOT_BLOCK; /* optional "not" */ 4436 NEED1("missing dst address"); 4437 if (add_dst(cmd, *av, proto, cblen, tstate)) { 4438 av++; 4439 if (F_LEN(cmd) != 0) { /* ! any */ 4440 prev = cmd; 4441 cmd = next_cmd(cmd, &cblen); 4442 } 4443 } else 4444 errx( EX_USAGE, "bad destination address %s", *av); 4445 OR_BLOCK(dest_ip); 4446 4447 /* 4448 * dest. ports, optional 4449 */ 4450 NOT_BLOCK; /* optional "not" */ 4451 if (av[0]) { 4452 if (_substrcmp(*av, "any") == 0 || 4453 add_ports(cmd, *av, proto, O_IP_DSTPORT, cblen)) { 4454 av++; 4455 if (F_LEN(cmd) != 0) 4456 cmd = next_cmd(cmd, &cblen); 4457 } 4458 } 4459 4460 read_options: 4461 prev = NULL; 4462 while ( av[0] != NULL ) { 4463 char *s; 4464 ipfw_insn_u32 *cmd32; /* alias for cmd */ 4465 4466 s = *av; 4467 cmd32 = (ipfw_insn_u32 *)cmd; 4468 4469 if (*s == '!') { /* alternate syntax for NOT */ 4470 if (cmd->len & F_NOT) 4471 errx(EX_USAGE, "double \"not\" not allowed\n"); 4472 cmd->len = F_NOT; 4473 s++; 4474 } 4475 i = match_token(rule_options, s); 4476 av++; 4477 switch(i) { 4478 case TOK_NOT: 4479 if (cmd->len & F_NOT) 4480 errx(EX_USAGE, "double \"not\" not allowed\n"); 4481 cmd->len = F_NOT; 4482 break; 4483 4484 case TOK_OR: 4485 if (open_par == 0 || prev == NULL) 4486 errx(EX_USAGE, "invalid \"or\" block\n"); 4487 prev->len |= F_OR; 4488 break; 4489 4490 case TOK_STARTBRACE: 4491 if (open_par) 4492 errx(EX_USAGE, "+nested \"(\" not allowed\n"); 4493 open_par = 1; 4494 break; 4495 4496 case TOK_ENDBRACE: 4497 if (!open_par) 4498 errx(EX_USAGE, "+missing \")\"\n"); 4499 open_par = 0; 4500 prev = NULL; 4501 break; 4502 4503 case TOK_IN: 4504 fill_cmd(cmd, O_IN, 0, 0); 4505 break; 4506 4507 case TOK_OUT: 4508 cmd->len ^= F_NOT; /* toggle F_NOT */ 4509 fill_cmd(cmd, O_IN, 0, 0); 4510 break; 4511 4512 case TOK_DIVERTED: 4513 fill_cmd(cmd, O_DIVERTED, 0, 3); 4514 break; 4515 4516 case TOK_DIVERTEDLOOPBACK: 4517 fill_cmd(cmd, O_DIVERTED, 0, 1); 4518 break; 4519 4520 case TOK_DIVERTEDOUTPUT: 4521 fill_cmd(cmd, O_DIVERTED, 0, 2); 4522 break; 4523 4524 case TOK_FRAG: 4525 fill_cmd(cmd, O_FRAG, 0, 0); 4526 break; 4527 4528 case TOK_LAYER2: 4529 fill_cmd(cmd, O_LAYER2, 0, 0); 4530 break; 4531 4532 case TOK_XMIT: 4533 case TOK_RECV: 4534 case TOK_VIA: 4535 NEED1("recv, xmit, via require interface name" 4536 " or address"); 4537 fill_iface((ipfw_insn_if *)cmd, av[0], cblen, tstate); 4538 av++; 4539 if (F_LEN(cmd) == 0) /* not a valid address */ 4540 break; 4541 if (i == TOK_XMIT) 4542 cmd->opcode = O_XMIT; 4543 else if (i == TOK_RECV) 4544 cmd->opcode = O_RECV; 4545 else if (i == TOK_VIA) 4546 cmd->opcode = O_VIA; 4547 break; 4548 4549 case TOK_ICMPTYPES: 4550 NEED1("icmptypes requires list of types"); 4551 fill_icmptypes((ipfw_insn_u32 *)cmd, *av); 4552 av++; 4553 break; 4554 4555 case TOK_ICMP6TYPES: 4556 NEED1("icmptypes requires list of types"); 4557 fill_icmp6types((ipfw_insn_icmp6 *)cmd, *av, cblen); 4558 av++; 4559 break; 4560 4561 case TOK_IPTTL: 4562 NEED1("ipttl requires TTL"); 4563 if (strpbrk(*av, "-,")) { 4564 if (!add_ports(cmd, *av, 0, O_IPTTL, cblen)) 4565 errx(EX_DATAERR, "invalid ipttl %s", *av); 4566 } else 4567 fill_cmd(cmd, O_IPTTL, 0, strtoul(*av, NULL, 0)); 4568 av++; 4569 break; 4570 4571 case TOK_IPID: 4572 NEED1("ipid requires id"); 4573 if (strpbrk(*av, "-,")) { 4574 if (!add_ports(cmd, *av, 0, O_IPID, cblen)) 4575 errx(EX_DATAERR, "invalid ipid %s", *av); 4576 } else 4577 fill_cmd(cmd, O_IPID, 0, strtoul(*av, NULL, 0)); 4578 av++; 4579 break; 4580 4581 case TOK_IPLEN: 4582 NEED1("iplen requires length"); 4583 if (strpbrk(*av, "-,")) { 4584 if (!add_ports(cmd, *av, 0, O_IPLEN, cblen)) 4585 errx(EX_DATAERR, "invalid ip len %s", *av); 4586 } else 4587 fill_cmd(cmd, O_IPLEN, 0, strtoul(*av, NULL, 0)); 4588 av++; 4589 break; 4590 4591 case TOK_IPVER: 4592 NEED1("ipver requires version"); 4593 fill_cmd(cmd, O_IPVER, 0, strtoul(*av, NULL, 0)); 4594 av++; 4595 break; 4596 4597 case TOK_IPPRECEDENCE: 4598 NEED1("ipprecedence requires value"); 4599 fill_cmd(cmd, O_IPPRECEDENCE, 0, 4600 (strtoul(*av, NULL, 0) & 7) << 5); 4601 av++; 4602 break; 4603 4604 case TOK_DSCP: 4605 NEED1("missing DSCP code"); 4606 fill_dscp(cmd, *av, cblen); 4607 av++; 4608 break; 4609 4610 case TOK_IPOPTS: 4611 NEED1("missing argument for ipoptions"); 4612 fill_flags_cmd(cmd, O_IPOPT, f_ipopts, *av); 4613 av++; 4614 break; 4615 4616 case TOK_IPTOS: 4617 NEED1("missing argument for iptos"); 4618 fill_flags_cmd(cmd, O_IPTOS, f_iptos, *av); 4619 av++; 4620 break; 4621 4622 case TOK_UID: 4623 NEED1("uid requires argument"); 4624 { 4625 char *end; 4626 uid_t uid; 4627 struct passwd *pwd; 4628 4629 cmd->opcode = O_UID; 4630 uid = strtoul(*av, &end, 0); 4631 pwd = (*end == '\0') ? getpwuid(uid) : getpwnam(*av); 4632 if (pwd == NULL) 4633 errx(EX_DATAERR, "uid \"%s\" nonexistent", *av); 4634 cmd32->d[0] = pwd->pw_uid; 4635 cmd->len |= F_INSN_SIZE(ipfw_insn_u32); 4636 av++; 4637 } 4638 break; 4639 4640 case TOK_GID: 4641 NEED1("gid requires argument"); 4642 { 4643 char *end; 4644 gid_t gid; 4645 struct group *grp; 4646 4647 cmd->opcode = O_GID; 4648 gid = strtoul(*av, &end, 0); 4649 grp = (*end == '\0') ? getgrgid(gid) : getgrnam(*av); 4650 if (grp == NULL) 4651 errx(EX_DATAERR, "gid \"%s\" nonexistent", *av); 4652 cmd32->d[0] = grp->gr_gid; 4653 cmd->len |= F_INSN_SIZE(ipfw_insn_u32); 4654 av++; 4655 } 4656 break; 4657 4658 case TOK_JAIL: 4659 NEED1("jail requires argument"); 4660 { 4661 int jid; 4662 4663 cmd->opcode = O_JAIL; 4664 jid = jail_getid(*av); 4665 if (jid < 0) 4666 errx(EX_DATAERR, "%s", jail_errmsg); 4667 cmd32->d[0] = (uint32_t)jid; 4668 cmd->len |= F_INSN_SIZE(ipfw_insn_u32); 4669 av++; 4670 } 4671 break; 4672 4673 case TOK_ESTAB: 4674 fill_cmd(cmd, O_ESTAB, 0, 0); 4675 break; 4676 4677 case TOK_SETUP: 4678 fill_cmd(cmd, O_TCPFLAGS, 0, 4679 (TH_SYN) | ( (TH_ACK) & 0xff) <<8 ); 4680 break; 4681 4682 case TOK_TCPDATALEN: 4683 NEED1("tcpdatalen requires length"); 4684 if (strpbrk(*av, "-,")) { 4685 if (!add_ports(cmd, *av, 0, O_TCPDATALEN, cblen)) 4686 errx(EX_DATAERR, "invalid tcpdata len %s", *av); 4687 } else 4688 fill_cmd(cmd, O_TCPDATALEN, 0, 4689 strtoul(*av, NULL, 0)); 4690 av++; 4691 break; 4692 4693 case TOK_TCPOPTS: 4694 NEED1("missing argument for tcpoptions"); 4695 fill_flags_cmd(cmd, O_TCPOPTS, f_tcpopts, *av); 4696 av++; 4697 break; 4698 4699 case TOK_TCPSEQ: 4700 case TOK_TCPACK: 4701 NEED1("tcpseq/tcpack requires argument"); 4702 cmd->len = F_INSN_SIZE(ipfw_insn_u32); 4703 cmd->opcode = (i == TOK_TCPSEQ) ? O_TCPSEQ : O_TCPACK; 4704 cmd32->d[0] = htonl(strtoul(*av, NULL, 0)); 4705 av++; 4706 break; 4707 4708 case TOK_TCPWIN: 4709 NEED1("tcpwin requires length"); 4710 if (strpbrk(*av, "-,")) { 4711 if (!add_ports(cmd, *av, 0, O_TCPWIN, cblen)) 4712 errx(EX_DATAERR, "invalid tcpwin len %s", *av); 4713 } else 4714 fill_cmd(cmd, O_TCPWIN, 0, 4715 strtoul(*av, NULL, 0)); 4716 av++; 4717 break; 4718 4719 case TOK_TCPFLAGS: 4720 NEED1("missing argument for tcpflags"); 4721 cmd->opcode = O_TCPFLAGS; 4722 fill_flags_cmd(cmd, O_TCPFLAGS, f_tcpflags, *av); 4723 av++; 4724 break; 4725 4726 case TOK_KEEPSTATE: 4727 case TOK_RECORDSTATE: { 4728 uint16_t uidx; 4729 4730 if (open_par) 4731 errx(EX_USAGE, "keep-state or record-state cannot be part " 4732 "of an or block"); 4733 if (have_state) 4734 errx(EX_USAGE, "only one of keep-state, record-state, " 4735 " limit and set-limit is allowed"); 4736 if (*av != NULL && *av[0] == ':') { 4737 if (state_check_name(*av + 1) != 0) 4738 errx(EX_DATAERR, 4739 "Invalid state name %s", *av); 4740 uidx = pack_object(tstate, *av + 1, 4741 IPFW_TLV_STATE_NAME); 4742 av++; 4743 } else 4744 uidx = pack_object(tstate, default_state_name, 4745 IPFW_TLV_STATE_NAME); 4746 have_state = cmd; 4747 have_rstate = i == TOK_RECORDSTATE; 4748 fill_cmd(cmd, O_KEEP_STATE, 0, uidx); 4749 break; 4750 } 4751 4752 case TOK_LIMIT: 4753 case TOK_SETLIMIT: { 4754 ipfw_insn_limit *c = (ipfw_insn_limit *)cmd; 4755 int val; 4756 4757 if (open_par) 4758 errx(EX_USAGE, 4759 "limit or set-limit cannot be part of an or block"); 4760 if (have_state) 4761 errx(EX_USAGE, "only one of keep-state, record-state, " 4762 " limit and set-limit is allowed"); 4763 have_state = cmd; 4764 have_rstate = i == TOK_SETLIMIT; 4765 4766 cmd->len = F_INSN_SIZE(ipfw_insn_limit); 4767 CHECK_CMDLEN; 4768 cmd->opcode = O_LIMIT; 4769 c->limit_mask = c->conn_limit = 0; 4770 4771 while ( av[0] != NULL ) { 4772 if ((val = match_token(limit_masks, *av)) <= 0) 4773 break; 4774 c->limit_mask |= val; 4775 av++; 4776 } 4777 4778 if (c->limit_mask == 0) 4779 errx(EX_USAGE, "limit: missing limit mask"); 4780 4781 GET_UINT_ARG(c->conn_limit, IPFW_ARG_MIN, IPFW_ARG_MAX, 4782 TOK_LIMIT, rule_options); 4783 av++; 4784 4785 if (*av != NULL && *av[0] == ':') { 4786 if (state_check_name(*av + 1) != 0) 4787 errx(EX_DATAERR, 4788 "Invalid state name %s", *av); 4789 cmd->arg1 = pack_object(tstate, *av + 1, 4790 IPFW_TLV_STATE_NAME); 4791 av++; 4792 } else 4793 cmd->arg1 = pack_object(tstate, 4794 default_state_name, IPFW_TLV_STATE_NAME); 4795 break; 4796 } 4797 4798 case TOK_PROTO: 4799 NEED1("missing protocol"); 4800 if (add_proto(cmd, *av, &proto)) { 4801 av++; 4802 } else 4803 errx(EX_DATAERR, "invalid protocol ``%s''", 4804 *av); 4805 break; 4806 4807 case TOK_SRCIP: 4808 NEED1("missing source IP"); 4809 if (add_srcip(cmd, *av, cblen, tstate)) { 4810 av++; 4811 } 4812 break; 4813 4814 case TOK_DSTIP: 4815 NEED1("missing destination IP"); 4816 if (add_dstip(cmd, *av, cblen, tstate)) { 4817 av++; 4818 } 4819 break; 4820 4821 case TOK_SRCIP6: 4822 NEED1("missing source IP6"); 4823 if (add_srcip6(cmd, *av, cblen, tstate)) { 4824 av++; 4825 } 4826 break; 4827 4828 case TOK_DSTIP6: 4829 NEED1("missing destination IP6"); 4830 if (add_dstip6(cmd, *av, cblen, tstate)) { 4831 av++; 4832 } 4833 break; 4834 4835 case TOK_SRCPORT: 4836 NEED1("missing source port"); 4837 if (_substrcmp(*av, "any") == 0 || 4838 add_ports(cmd, *av, proto, O_IP_SRCPORT, cblen)) { 4839 av++; 4840 } else 4841 errx(EX_DATAERR, "invalid source port %s", *av); 4842 break; 4843 4844 case TOK_DSTPORT: 4845 NEED1("missing destination port"); 4846 if (_substrcmp(*av, "any") == 0 || 4847 add_ports(cmd, *av, proto, O_IP_DSTPORT, cblen)) { 4848 av++; 4849 } else 4850 errx(EX_DATAERR, "invalid destination port %s", 4851 *av); 4852 break; 4853 4854 case TOK_MAC: 4855 if (add_mac(cmd, av, cblen)) 4856 av += 2; 4857 break; 4858 4859 case TOK_MACTYPE: 4860 NEED1("missing mac type"); 4861 if (!add_mactype(cmd, *av, cblen)) 4862 errx(EX_DATAERR, "invalid mac type %s", *av); 4863 av++; 4864 break; 4865 4866 case TOK_VERREVPATH: 4867 fill_cmd(cmd, O_VERREVPATH, 0, 0); 4868 break; 4869 4870 case TOK_VERSRCREACH: 4871 fill_cmd(cmd, O_VERSRCREACH, 0, 0); 4872 break; 4873 4874 case TOK_ANTISPOOF: 4875 fill_cmd(cmd, O_ANTISPOOF, 0, 0); 4876 break; 4877 4878 case TOK_IPSEC: 4879 fill_cmd(cmd, O_IPSEC, 0, 0); 4880 break; 4881 4882 case TOK_IPV6: 4883 fill_cmd(cmd, O_IP6, 0, 0); 4884 break; 4885 4886 case TOK_IPV4: 4887 fill_cmd(cmd, O_IP4, 0, 0); 4888 break; 4889 4890 case TOK_EXT6HDR: 4891 fill_ext6hdr( cmd, *av ); 4892 av++; 4893 break; 4894 4895 case TOK_FLOWID: 4896 if (proto != IPPROTO_IPV6 ) 4897 errx( EX_USAGE, "flow-id filter is active " 4898 "only for ipv6 protocol\n"); 4899 fill_flow6( (ipfw_insn_u32 *) cmd, *av, cblen); 4900 av++; 4901 break; 4902 4903 case TOK_COMMENT: 4904 fill_comment(cmd, av, cblen); 4905 av[0]=NULL; 4906 break; 4907 4908 case TOK_TAGGED: 4909 if (av[0] && strpbrk(*av, "-,")) { 4910 if (!add_ports(cmd, *av, 0, O_TAGGED, cblen)) 4911 errx(EX_DATAERR, "tagged: invalid tag" 4912 " list: %s", *av); 4913 } 4914 else { 4915 uint16_t tag; 4916 4917 GET_UINT_ARG(tag, IPFW_ARG_MIN, IPFW_ARG_MAX, 4918 TOK_TAGGED, rule_options); 4919 fill_cmd(cmd, O_TAGGED, 0, tag); 4920 } 4921 av++; 4922 break; 4923 4924 case TOK_FIB: 4925 NEED1("fib requires fib number"); 4926 fill_cmd(cmd, O_FIB, 0, strtoul(*av, NULL, 0)); 4927 av++; 4928 break; 4929 case TOK_SOCKARG: 4930 fill_cmd(cmd, O_SOCKARG, 0, 0); 4931 break; 4932 4933 case TOK_LOOKUP: { 4934 ipfw_insn_u32 *c = (ipfw_insn_u32 *)cmd; 4935 int j; 4936 4937 if (!av[0] || !av[1]) 4938 errx(EX_USAGE, "format: lookup argument tablenum"); 4939 cmd->opcode = O_IP_DST_LOOKUP; 4940 cmd->len |= F_INSN_SIZE(ipfw_insn) + 2; 4941 i = match_token(rule_options, *av); 4942 for (j = 0; lookup_key[j] >= 0 ; j++) { 4943 if (i == lookup_key[j]) 4944 break; 4945 } 4946 if (lookup_key[j] <= 0) 4947 errx(EX_USAGE, "format: cannot lookup on %s", *av); 4948 __PAST_END(c->d, 1) = j; // i converted to option 4949 av++; 4950 4951 if ((j = pack_table(tstate, *av)) == 0) 4952 errx(EX_DATAERR, "Invalid table name: %s", *av); 4953 4954 cmd->arg1 = j; 4955 av++; 4956 } 4957 break; 4958 case TOK_FLOW: 4959 NEED1("missing table name"); 4960 if (strncmp(*av, "table(", 6) != 0) 4961 errx(EX_DATAERR, 4962 "enclose table name into \"table()\""); 4963 fill_table(cmd, *av, O_IP_FLOW_LOOKUP, tstate); 4964 av++; 4965 break; 4966 4967 case TOK_SKIPACTION: 4968 if (have_skipcmd) 4969 errx(EX_USAGE, "only one defer-action " 4970 "is allowed"); 4971 have_skipcmd = cmd; 4972 fill_cmd(cmd, O_SKIP_ACTION, 0, 0); 4973 break; 4974 4975 default: 4976 errx(EX_USAGE, "unrecognised option [%d] %s\n", i, s); 4977 } 4978 if (F_LEN(cmd) > 0) { /* prepare to advance */ 4979 prev = cmd; 4980 cmd = next_cmd(cmd, &cblen); 4981 } 4982 } 4983 4984 done: 4985 4986 if (!have_state && have_skipcmd) 4987 warnx("Rule contains \"defer-immediate-action\" " 4988 "and doesn't contain any state-related options."); 4989 4990 /* 4991 * Now copy stuff into the rule. 4992 * If we have a keep-state option, the first instruction 4993 * must be a PROBE_STATE (which is generated here). 4994 * If we have a LOG option, it was stored as the first command, 4995 * and now must be moved to the top of the action part. 4996 */ 4997 dst = (ipfw_insn *)rule->cmd; 4998 4999 /* 5000 * First thing to write into the command stream is the match probability. 5001 */ 5002 if (match_prob != 1) { /* 1 means always match */ 5003 dst->opcode = O_PROB; 5004 dst->len = 2; 5005 *((int32_t *)(dst+1)) = (int32_t)(match_prob * 0x7fffffff); 5006 dst += dst->len; 5007 } 5008 5009 /* 5010 * generate O_PROBE_STATE if necessary 5011 */ 5012 if (have_state && have_state->opcode != O_CHECK_STATE && !have_rstate) { 5013 fill_cmd(dst, O_PROBE_STATE, 0, have_state->arg1); 5014 dst = next_cmd(dst, &rblen); 5015 } 5016 5017 /* 5018 * copy all commands but O_LOG, O_KEEP_STATE, O_LIMIT, O_ALTQ, O_TAG, 5019 * O_SKIP_ACTION 5020 */ 5021 for (src = (ipfw_insn *)cmdbuf; src != cmd; src += i) { 5022 i = F_LEN(src); 5023 CHECK_RBUFLEN(i); 5024 5025 switch (src->opcode) { 5026 case O_LOG: 5027 case O_KEEP_STATE: 5028 case O_LIMIT: 5029 case O_ALTQ: 5030 case O_TAG: 5031 case O_SKIP_ACTION: 5032 break; 5033 default: 5034 bcopy(src, dst, i * sizeof(uint32_t)); 5035 dst += i; 5036 } 5037 } 5038 5039 /* 5040 * put back the have_state command as last opcode 5041 */ 5042 if (have_state && have_state->opcode != O_CHECK_STATE) { 5043 i = F_LEN(have_state); 5044 CHECK_RBUFLEN(i); 5045 bcopy(have_state, dst, i * sizeof(uint32_t)); 5046 dst += i; 5047 } 5048 5049 /* 5050 * put back the have_skipcmd command as very last opcode 5051 */ 5052 if (have_skipcmd) { 5053 i = F_LEN(have_skipcmd); 5054 CHECK_RBUFLEN(i); 5055 bcopy(have_skipcmd, dst, i * sizeof(uint32_t)); 5056 dst += i; 5057 } 5058 5059 /* 5060 * start action section 5061 */ 5062 rule->act_ofs = dst - rule->cmd; 5063 5064 /* put back O_LOG, O_ALTQ, O_TAG if necessary */ 5065 if (have_log) { 5066 i = F_LEN(have_log); 5067 CHECK_RBUFLEN(i); 5068 bcopy(have_log, dst, i * sizeof(uint32_t)); 5069 dst += i; 5070 } 5071 if (have_altq) { 5072 i = F_LEN(have_altq); 5073 CHECK_RBUFLEN(i); 5074 bcopy(have_altq, dst, i * sizeof(uint32_t)); 5075 dst += i; 5076 } 5077 if (have_tag) { 5078 i = F_LEN(have_tag); 5079 CHECK_RBUFLEN(i); 5080 bcopy(have_tag, dst, i * sizeof(uint32_t)); 5081 dst += i; 5082 } 5083 5084 /* 5085 * copy all other actions 5086 */ 5087 for (src = (ipfw_insn *)actbuf; src != action; src += i) { 5088 i = F_LEN(src); 5089 CHECK_RBUFLEN(i); 5090 bcopy(src, dst, i * sizeof(uint32_t)); 5091 dst += i; 5092 } 5093 5094 rule->cmd_len = (uint32_t *)dst - (uint32_t *)(rule->cmd); 5095 *rbufsize = (char *)dst - (char *)rule; 5096 } 5097 5098 static int 5099 compare_ntlv(const void *_a, const void *_b) 5100 { 5101 ipfw_obj_ntlv *a, *b; 5102 5103 a = (ipfw_obj_ntlv *)_a; 5104 b = (ipfw_obj_ntlv *)_b; 5105 5106 if (a->set < b->set) 5107 return (-1); 5108 else if (a->set > b->set) 5109 return (1); 5110 5111 if (a->idx < b->idx) 5112 return (-1); 5113 else if (a->idx > b->idx) 5114 return (1); 5115 5116 if (a->head.type < b->head.type) 5117 return (-1); 5118 else if (a->head.type > b->head.type) 5119 return (1); 5120 5121 return (0); 5122 } 5123 5124 /* 5125 * Provide kernel with sorted list of referenced objects 5126 */ 5127 static void 5128 object_sort_ctlv(ipfw_obj_ctlv *ctlv) 5129 { 5130 5131 qsort(ctlv + 1, ctlv->count, ctlv->objsize, compare_ntlv); 5132 } 5133 5134 struct object_kt { 5135 uint16_t uidx; 5136 uint16_t type; 5137 }; 5138 static int 5139 compare_object_kntlv(const void *k, const void *v) 5140 { 5141 ipfw_obj_ntlv *ntlv; 5142 struct object_kt key; 5143 5144 key = *((struct object_kt *)k); 5145 ntlv = (ipfw_obj_ntlv *)v; 5146 5147 if (key.uidx < ntlv->idx) 5148 return (-1); 5149 else if (key.uidx > ntlv->idx) 5150 return (1); 5151 5152 if (key.type < ntlv->head.type) 5153 return (-1); 5154 else if (key.type > ntlv->head.type) 5155 return (1); 5156 5157 return (0); 5158 } 5159 5160 /* 5161 * Finds object name in @ctlv by @idx and @type. 5162 * Uses the following facts: 5163 * 1) All TLVs are the same size 5164 * 2) Kernel implementation provides already sorted list. 5165 * 5166 * Returns table name or NULL. 5167 */ 5168 static char * 5169 object_search_ctlv(ipfw_obj_ctlv *ctlv, uint16_t idx, uint16_t type) 5170 { 5171 ipfw_obj_ntlv *ntlv; 5172 struct object_kt key; 5173 5174 key.uidx = idx; 5175 key.type = type; 5176 5177 ntlv = bsearch(&key, (ctlv + 1), ctlv->count, ctlv->objsize, 5178 compare_object_kntlv); 5179 5180 if (ntlv != NULL) 5181 return (ntlv->name); 5182 5183 return (NULL); 5184 } 5185 5186 static char * 5187 table_search_ctlv(ipfw_obj_ctlv *ctlv, uint16_t idx) 5188 { 5189 5190 return (object_search_ctlv(ctlv, idx, IPFW_TLV_TBL_NAME)); 5191 } 5192 5193 /* 5194 * Adds one or more rules to ipfw chain. 5195 * Data layout: 5196 * Request: 5197 * [ 5198 * ip_fw3_opheader 5199 * [ ipfw_obj_ctlv(IPFW_TLV_TBL_LIST) ipfw_obj_ntlv x N ] (optional *1) 5200 * [ ipfw_obj_ctlv(IPFW_TLV_RULE_LIST) [ ip_fw_rule ip_fw_insn ] x N ] (*2) (*3) 5201 * ] 5202 * Reply: 5203 * [ 5204 * ip_fw3_opheader 5205 * [ ipfw_obj_ctlv(IPFW_TLV_TBL_LIST) ipfw_obj_ntlv x N ] (optional) 5206 * [ ipfw_obj_ctlv(IPFW_TLV_RULE_LIST) [ ip_fw_rule ip_fw_insn ] x N ] 5207 * ] 5208 * 5209 * Rules in reply are modified to store their actual ruleset number. 5210 * 5211 * (*1) TLVs inside IPFW_TLV_TBL_LIST needs to be sorted ascending 5212 * according to their idx field and there has to be no duplicates. 5213 * (*2) Numbered rules inside IPFW_TLV_RULE_LIST needs to be sorted ascending. 5214 * (*3) Each ip_fw structure needs to be aligned to u64 boundary. 5215 */ 5216 void 5217 ipfw_add(char *av[]) 5218 { 5219 uint32_t rulebuf[1024]; 5220 int rbufsize, default_off, tlen, rlen; 5221 size_t sz; 5222 struct tidx ts; 5223 struct ip_fw_rule *rule; 5224 caddr_t tbuf; 5225 ip_fw3_opheader *op3; 5226 ipfw_obj_ctlv *ctlv, *tstate; 5227 5228 rbufsize = sizeof(rulebuf); 5229 memset(rulebuf, 0, rbufsize); 5230 memset(&ts, 0, sizeof(ts)); 5231 5232 /* Optimize case with no tables */ 5233 default_off = sizeof(ipfw_obj_ctlv) + sizeof(ip_fw3_opheader); 5234 op3 = (ip_fw3_opheader *)rulebuf; 5235 ctlv = (ipfw_obj_ctlv *)(op3 + 1); 5236 rule = (struct ip_fw_rule *)(ctlv + 1); 5237 rbufsize -= default_off; 5238 5239 compile_rule(av, (uint32_t *)rule, &rbufsize, &ts); 5240 /* Align rule size to u64 boundary */ 5241 rlen = roundup2(rbufsize, sizeof(uint64_t)); 5242 5243 tbuf = NULL; 5244 sz = 0; 5245 tstate = NULL; 5246 if (ts.count != 0) { 5247 /* Some tables. We have to alloc more data */ 5248 tlen = ts.count * sizeof(ipfw_obj_ntlv); 5249 sz = default_off + sizeof(ipfw_obj_ctlv) + tlen + rlen; 5250 5251 if ((tbuf = calloc(1, sz)) == NULL) 5252 err(EX_UNAVAILABLE, "malloc() failed for IP_FW_ADD"); 5253 op3 = (ip_fw3_opheader *)tbuf; 5254 /* Tables first */ 5255 ctlv = (ipfw_obj_ctlv *)(op3 + 1); 5256 ctlv->head.type = IPFW_TLV_TBLNAME_LIST; 5257 ctlv->head.length = sizeof(ipfw_obj_ctlv) + tlen; 5258 ctlv->count = ts.count; 5259 ctlv->objsize = sizeof(ipfw_obj_ntlv); 5260 memcpy(ctlv + 1, ts.idx, tlen); 5261 object_sort_ctlv(ctlv); 5262 tstate = ctlv; 5263 /* Rule next */ 5264 ctlv = (ipfw_obj_ctlv *)((caddr_t)ctlv + ctlv->head.length); 5265 ctlv->head.type = IPFW_TLV_RULE_LIST; 5266 ctlv->head.length = sizeof(ipfw_obj_ctlv) + rlen; 5267 ctlv->count = 1; 5268 memcpy(ctlv + 1, rule, rbufsize); 5269 } else { 5270 /* Simply add header */ 5271 sz = rlen + default_off; 5272 memset(ctlv, 0, sizeof(*ctlv)); 5273 ctlv->head.type = IPFW_TLV_RULE_LIST; 5274 ctlv->head.length = sizeof(ipfw_obj_ctlv) + rlen; 5275 ctlv->count = 1; 5276 } 5277 5278 if (do_get3(IP_FW_XADD, op3, &sz) != 0) 5279 err(EX_UNAVAILABLE, "getsockopt(%s)", "IP_FW_XADD"); 5280 5281 if (!co.do_quiet) { 5282 struct format_opts sfo; 5283 struct buf_pr bp; 5284 memset(&sfo, 0, sizeof(sfo)); 5285 sfo.tstate = tstate; 5286 sfo.set_mask = (uint32_t)(-1); 5287 bp_alloc(&bp, 4096); 5288 show_static_rule(&co, &sfo, &bp, rule, NULL); 5289 printf("%s", bp.buf); 5290 bp_free(&bp); 5291 } 5292 5293 if (tbuf != NULL) 5294 free(tbuf); 5295 5296 if (ts.idx != NULL) 5297 free(ts.idx); 5298 } 5299 5300 /* 5301 * clear the counters or the log counters. 5302 * optname has the following values: 5303 * 0 (zero both counters and logging) 5304 * 1 (zero logging only) 5305 */ 5306 void 5307 ipfw_zero(int ac, char *av[], int optname) 5308 { 5309 ipfw_range_tlv rt; 5310 char const *errstr; 5311 char const *name = optname ? "RESETLOG" : "ZERO"; 5312 uint32_t arg; 5313 int failed = EX_OK; 5314 5315 optname = optname ? IP_FW_XRESETLOG : IP_FW_XZERO; 5316 av++; ac--; 5317 5318 if (ac == 0) { 5319 /* clear all entries */ 5320 memset(&rt, 0, sizeof(rt)); 5321 rt.flags = IPFW_RCFLAG_ALL; 5322 if (do_range_cmd(optname, &rt) < 0) 5323 err(EX_UNAVAILABLE, "setsockopt(IP_FW_X%s)", name); 5324 if (!co.do_quiet) 5325 printf("%s.\n", optname == IP_FW_XZERO ? 5326 "Accounting cleared":"Logging counts reset"); 5327 5328 return; 5329 } 5330 5331 while (ac) { 5332 /* Rule number */ 5333 if (isdigit(**av)) { 5334 arg = strtonum(*av, 0, 0xffff, &errstr); 5335 if (errstr) 5336 errx(EX_DATAERR, 5337 "invalid rule number %s\n", *av); 5338 memset(&rt, 0, sizeof(rt)); 5339 rt.start_rule = arg; 5340 rt.end_rule = arg; 5341 rt.flags |= IPFW_RCFLAG_RANGE; 5342 if (co.use_set != 0) { 5343 rt.set = co.use_set - 1; 5344 rt.flags |= IPFW_RCFLAG_SET; 5345 } 5346 if (do_range_cmd(optname, &rt) != 0) { 5347 warn("rule %u: setsockopt(IP_FW_X%s)", 5348 arg, name); 5349 failed = EX_UNAVAILABLE; 5350 } else if (rt.new_set == 0) { 5351 printf("Entry %d not found\n", arg); 5352 failed = EX_UNAVAILABLE; 5353 } else if (!co.do_quiet) 5354 printf("Entry %d %s.\n", arg, 5355 optname == IP_FW_XZERO ? 5356 "cleared" : "logging count reset"); 5357 } else { 5358 errx(EX_USAGE, "invalid rule number ``%s''", *av); 5359 } 5360 av++; ac--; 5361 } 5362 if (failed != EX_OK) 5363 exit(failed); 5364 } 5365 5366 void 5367 ipfw_flush(int force) 5368 { 5369 ipfw_range_tlv rt; 5370 5371 if (!force && !co.do_quiet) { /* need to ask user */ 5372 int c; 5373 5374 printf("Are you sure? [yn] "); 5375 fflush(stdout); 5376 do { 5377 c = toupper(getc(stdin)); 5378 while (c != '\n' && getc(stdin) != '\n') 5379 if (feof(stdin)) 5380 return; /* and do not flush */ 5381 } while (c != 'Y' && c != 'N'); 5382 printf("\n"); 5383 if (c == 'N') /* user said no */ 5384 return; 5385 } 5386 if (co.do_pipe) { 5387 dummynet_flush(); 5388 return; 5389 } 5390 /* `ipfw set N flush` - is the same that `ipfw delete set N` */ 5391 memset(&rt, 0, sizeof(rt)); 5392 if (co.use_set != 0) { 5393 rt.set = co.use_set - 1; 5394 rt.flags = IPFW_RCFLAG_SET; 5395 } else 5396 rt.flags = IPFW_RCFLAG_ALL; 5397 if (do_range_cmd(IP_FW_XDEL, &rt) != 0) 5398 err(EX_UNAVAILABLE, "setsockopt(IP_FW_XDEL)"); 5399 if (!co.do_quiet) 5400 printf("Flushed all %s.\n", co.do_pipe ? "pipes" : "rules"); 5401 } 5402 5403 static struct _s_x intcmds[] = { 5404 { "talist", TOK_TALIST }, 5405 { "iflist", TOK_IFLIST }, 5406 { "olist", TOK_OLIST }, 5407 { "vlist", TOK_VLIST }, 5408 { NULL, 0 } 5409 }; 5410 5411 static struct _s_x otypes[] = { 5412 { "EACTION", IPFW_TLV_EACTION }, 5413 { "DYNSTATE", IPFW_TLV_STATE_NAME }, 5414 { NULL, 0 } 5415 }; 5416 5417 static const char* 5418 lookup_eaction_name(ipfw_obj_ntlv *ntlv, int cnt, uint16_t type) 5419 { 5420 const char *name; 5421 int i; 5422 5423 name = NULL; 5424 for (i = 0; i < cnt; i++) { 5425 if (ntlv[i].head.type != IPFW_TLV_EACTION) 5426 continue; 5427 if (IPFW_TLV_EACTION_NAME(ntlv[i].idx) != type) 5428 continue; 5429 name = ntlv[i].name; 5430 break; 5431 } 5432 return (name); 5433 } 5434 5435 static void 5436 ipfw_list_objects(int ac, char *av[]) 5437 { 5438 ipfw_obj_lheader req, *olh; 5439 ipfw_obj_ntlv *ntlv; 5440 const char *name; 5441 size_t sz; 5442 int i; 5443 5444 memset(&req, 0, sizeof(req)); 5445 sz = sizeof(req); 5446 if (do_get3(IP_FW_DUMP_SRVOBJECTS, &req.opheader, &sz) != 0) 5447 if (errno != ENOMEM) 5448 return; 5449 5450 sz = req.size; 5451 if ((olh = calloc(1, sz)) == NULL) 5452 return; 5453 5454 olh->size = sz; 5455 if (do_get3(IP_FW_DUMP_SRVOBJECTS, &olh->opheader, &sz) != 0) { 5456 free(olh); 5457 return; 5458 } 5459 5460 if (olh->count > 0) 5461 printf("Objects list:\n"); 5462 else 5463 printf("There are no objects\n"); 5464 ntlv = (ipfw_obj_ntlv *)(olh + 1); 5465 for (i = 0; i < olh->count; i++) { 5466 name = match_value(otypes, ntlv->head.type); 5467 if (name == NULL) 5468 name = lookup_eaction_name( 5469 (ipfw_obj_ntlv *)(olh + 1), olh->count, 5470 ntlv->head.type); 5471 if (name == NULL) 5472 printf(" kidx: %4d\ttype: %10d\tname: %s\n", 5473 ntlv->idx, ntlv->head.type, ntlv->name); 5474 else 5475 printf(" kidx: %4d\ttype: %10s\tname: %s\n", 5476 ntlv->idx, name, ntlv->name); 5477 ntlv++; 5478 } 5479 free(olh); 5480 } 5481 5482 void 5483 ipfw_internal_handler(int ac, char *av[]) 5484 { 5485 int tcmd; 5486 5487 ac--; av++; 5488 NEED1("internal cmd required"); 5489 5490 if ((tcmd = match_token(intcmds, *av)) == -1) 5491 errx(EX_USAGE, "invalid internal sub-cmd: %s", *av); 5492 5493 switch (tcmd) { 5494 case TOK_IFLIST: 5495 ipfw_list_tifaces(); 5496 break; 5497 case TOK_TALIST: 5498 ipfw_list_ta(ac, av); 5499 break; 5500 case TOK_OLIST: 5501 ipfw_list_objects(ac, av); 5502 break; 5503 case TOK_VLIST: 5504 ipfw_list_values(ac, av); 5505 break; 5506 } 5507 } 5508 5509 static int 5510 ipfw_get_tracked_ifaces(ipfw_obj_lheader **polh) 5511 { 5512 ipfw_obj_lheader req, *olh; 5513 size_t sz; 5514 5515 memset(&req, 0, sizeof(req)); 5516 sz = sizeof(req); 5517 5518 if (do_get3(IP_FW_XIFLIST, &req.opheader, &sz) != 0) { 5519 if (errno != ENOMEM) 5520 return (errno); 5521 } 5522 5523 sz = req.size; 5524 if ((olh = calloc(1, sz)) == NULL) 5525 return (ENOMEM); 5526 5527 olh->size = sz; 5528 if (do_get3(IP_FW_XIFLIST, &olh->opheader, &sz) != 0) { 5529 free(olh); 5530 return (errno); 5531 } 5532 5533 *polh = olh; 5534 return (0); 5535 } 5536 5537 static int 5538 ifinfo_cmp(const void *a, const void *b) 5539 { 5540 ipfw_iface_info *ia, *ib; 5541 5542 ia = (ipfw_iface_info *)a; 5543 ib = (ipfw_iface_info *)b; 5544 5545 return (stringnum_cmp(ia->ifname, ib->ifname)); 5546 } 5547 5548 /* 5549 * Retrieves table list from kernel, 5550 * optionally sorts it and calls requested function for each table. 5551 * Returns 0 on success. 5552 */ 5553 static void 5554 ipfw_list_tifaces() 5555 { 5556 ipfw_obj_lheader *olh; 5557 ipfw_iface_info *info; 5558 int i, error; 5559 5560 if ((error = ipfw_get_tracked_ifaces(&olh)) != 0) 5561 err(EX_OSERR, "Unable to request ipfw tracked interface list"); 5562 5563 5564 qsort(olh + 1, olh->count, olh->objsize, ifinfo_cmp); 5565 5566 info = (ipfw_iface_info *)(olh + 1); 5567 for (i = 0; i < olh->count; i++) { 5568 if (info->flags & IPFW_IFFLAG_RESOLVED) 5569 printf("%s ifindex: %d refcount: %u changes: %u\n", 5570 info->ifname, info->ifindex, info->refcnt, 5571 info->gencnt); 5572 else 5573 printf("%s ifindex: unresolved refcount: %u changes: %u\n", 5574 info->ifname, info->refcnt, info->gencnt); 5575 info = (ipfw_iface_info *)((caddr_t)info + olh->objsize); 5576 } 5577 5578 free(olh); 5579 } 5580 5581 5582 5583 5584