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 { "tcpmss", TOK_TCPMSS }, 342 { "tcpoptions", TOK_TCPOPTS }, 343 { "tcpopts", TOK_TCPOPTS }, 344 { "tcpseq", TOK_TCPSEQ }, 345 { "tcpack", TOK_TCPACK }, 346 { "tcpwin", TOK_TCPWIN }, 347 { "icmptype", TOK_ICMPTYPES }, 348 { "icmptypes", TOK_ICMPTYPES }, 349 { "dst-ip", TOK_DSTIP }, 350 { "src-ip", TOK_SRCIP }, 351 { "dst-port", TOK_DSTPORT }, 352 { "src-port", TOK_SRCPORT }, 353 { "proto", TOK_PROTO }, 354 { "MAC", TOK_MAC }, 355 { "mac", TOK_MAC }, 356 { "mac-type", TOK_MACTYPE }, 357 { "verrevpath", TOK_VERREVPATH }, 358 { "versrcreach", TOK_VERSRCREACH }, 359 { "antispoof", TOK_ANTISPOOF }, 360 { "ipsec", TOK_IPSEC }, 361 { "icmp6type", TOK_ICMP6TYPES }, 362 { "icmp6types", TOK_ICMP6TYPES }, 363 { "ext6hdr", TOK_EXT6HDR}, 364 { "flow-id", TOK_FLOWID}, 365 { "ipv6", TOK_IPV6}, 366 { "ip6", TOK_IPV6}, 367 { "ipv4", TOK_IPV4}, 368 { "ip4", TOK_IPV4}, 369 { "dst-ipv6", TOK_DSTIP6}, 370 { "dst-ip6", TOK_DSTIP6}, 371 { "src-ipv6", TOK_SRCIP6}, 372 { "src-ip6", TOK_SRCIP6}, 373 { "lookup", TOK_LOOKUP}, 374 { "flow", TOK_FLOW}, 375 { "defer-action", TOK_SKIPACTION }, 376 { "defer-immediate-action", TOK_SKIPACTION }, 377 { "//", TOK_COMMENT }, 378 379 { "not", TOK_NOT }, /* pseudo option */ 380 { "!", /* escape ? */ TOK_NOT }, /* pseudo option */ 381 { "or", TOK_OR }, /* pseudo option */ 382 { "|", /* escape */ TOK_OR }, /* pseudo option */ 383 { "{", TOK_STARTBRACE }, /* pseudo option */ 384 { "(", TOK_STARTBRACE }, /* pseudo option */ 385 { "}", TOK_ENDBRACE }, /* pseudo option */ 386 { ")", TOK_ENDBRACE }, /* pseudo option */ 387 { NULL, 0 } /* terminator */ 388 }; 389 390 void bprint_uint_arg(struct buf_pr *bp, const char *str, uint32_t arg); 391 static int ipfw_get_config(struct cmdline_opts *co, struct format_opts *fo, 392 ipfw_cfg_lheader **pcfg, size_t *psize); 393 static int ipfw_show_config(struct cmdline_opts *co, struct format_opts *fo, 394 ipfw_cfg_lheader *cfg, size_t sz, int ac, char **av); 395 static void ipfw_list_tifaces(void); 396 397 struct tidx; 398 static uint16_t pack_object(struct tidx *tstate, char *name, int otype); 399 static uint16_t pack_table(struct tidx *tstate, char *name); 400 401 static char *table_search_ctlv(ipfw_obj_ctlv *ctlv, uint16_t idx); 402 static void object_sort_ctlv(ipfw_obj_ctlv *ctlv); 403 static char *object_search_ctlv(ipfw_obj_ctlv *ctlv, uint16_t idx, 404 uint16_t type); 405 406 /* 407 * Simple string buffer API. 408 * Used to simplify buffer passing between function and for 409 * transparent overrun handling. 410 */ 411 412 /* 413 * Allocates new buffer of given size @sz. 414 * 415 * Returns 0 on success. 416 */ 417 int 418 bp_alloc(struct buf_pr *b, size_t size) 419 { 420 memset(b, 0, sizeof(struct buf_pr)); 421 422 if ((b->buf = calloc(1, size)) == NULL) 423 return (ENOMEM); 424 425 b->ptr = b->buf; 426 b->size = size; 427 b->avail = b->size; 428 429 return (0); 430 } 431 432 void 433 bp_free(struct buf_pr *b) 434 { 435 436 free(b->buf); 437 } 438 439 /* 440 * Flushes buffer so new writer start from beginning. 441 */ 442 void 443 bp_flush(struct buf_pr *b) 444 { 445 446 b->ptr = b->buf; 447 b->avail = b->size; 448 b->buf[0] = '\0'; 449 } 450 451 /* 452 * Print message specified by @format and args. 453 * Automatically manage buffer space and transparently handle 454 * buffer overruns. 455 * 456 * Returns number of bytes that should have been printed. 457 */ 458 int 459 bprintf(struct buf_pr *b, char *format, ...) 460 { 461 va_list args; 462 int i; 463 464 va_start(args, format); 465 466 i = vsnprintf(b->ptr, b->avail, format, args); 467 va_end(args); 468 469 if (i > b->avail || i < 0) { 470 /* Overflow or print error */ 471 b->avail = 0; 472 } else { 473 b->ptr += i; 474 b->avail -= i; 475 } 476 477 b->needed += i; 478 479 return (i); 480 } 481 482 /* 483 * Special values printer for tablearg-aware opcodes. 484 */ 485 void 486 bprint_uint_arg(struct buf_pr *bp, const char *str, uint32_t arg) 487 { 488 489 if (str != NULL) 490 bprintf(bp, "%s", str); 491 if (arg == IP_FW_TARG) 492 bprintf(bp, "tablearg"); 493 else 494 bprintf(bp, "%u", arg); 495 } 496 497 /* 498 * Helper routine to print a possibly unaligned uint64_t on 499 * various platform. If width > 0, print the value with 500 * the desired width, followed by a space; 501 * otherwise, return the required width. 502 */ 503 int 504 pr_u64(struct buf_pr *b, uint64_t *pd, int width) 505 { 506 #ifdef TCC 507 #define U64_FMT "I64" 508 #else 509 #define U64_FMT "llu" 510 #endif 511 uint64_t u; 512 unsigned long long d; 513 514 bcopy (pd, &u, sizeof(u)); 515 d = u; 516 return (width > 0) ? 517 bprintf(b, "%*" U64_FMT " ", width, d) : 518 snprintf(NULL, 0, "%" U64_FMT, d) ; 519 #undef U64_FMT 520 } 521 522 523 void * 524 safe_calloc(size_t number, size_t size) 525 { 526 void *ret = calloc(number, size); 527 528 if (ret == NULL) 529 err(EX_OSERR, "calloc"); 530 return ret; 531 } 532 533 void * 534 safe_realloc(void *ptr, size_t size) 535 { 536 void *ret = realloc(ptr, size); 537 538 if (ret == NULL) 539 err(EX_OSERR, "realloc"); 540 return ret; 541 } 542 543 /* 544 * Compare things like interface or table names. 545 */ 546 int 547 stringnum_cmp(const char *a, const char *b) 548 { 549 int la, lb; 550 551 la = strlen(a); 552 lb = strlen(b); 553 554 if (la > lb) 555 return (1); 556 else if (la < lb) 557 return (-01); 558 559 return (strcmp(a, b)); 560 } 561 562 563 /* 564 * conditionally runs the command. 565 * Selected options or negative -> getsockopt 566 */ 567 int 568 do_cmd(int optname, void *optval, uintptr_t optlen) 569 { 570 int i; 571 572 if (co.test_only) 573 return 0; 574 575 if (ipfw_socket == -1) 576 ipfw_socket = socket(AF_INET, SOCK_RAW, IPPROTO_RAW); 577 if (ipfw_socket < 0) 578 err(EX_UNAVAILABLE, "socket"); 579 580 if (optname == IP_FW_GET || optname == IP_DUMMYNET_GET || 581 optname == IP_FW_ADD || optname == IP_FW3 || 582 optname == IP_FW_NAT_GET_CONFIG || 583 optname < 0 || 584 optname == IP_FW_NAT_GET_LOG) { 585 if (optname < 0) 586 optname = -optname; 587 i = getsockopt(ipfw_socket, IPPROTO_IP, optname, optval, 588 (socklen_t *)optlen); 589 } else { 590 i = setsockopt(ipfw_socket, IPPROTO_IP, optname, optval, optlen); 591 } 592 return i; 593 } 594 595 /* 596 * do_set3 - pass ipfw control cmd to kernel 597 * @optname: option name 598 * @optval: pointer to option data 599 * @optlen: option length 600 * 601 * Assumes op3 header is already embedded. 602 * Calls setsockopt() with IP_FW3 as kernel-visible opcode. 603 * Returns 0 on success or errno otherwise. 604 */ 605 int 606 do_set3(int optname, ip_fw3_opheader *op3, size_t optlen) 607 { 608 609 if (co.test_only) 610 return (0); 611 612 if (ipfw_socket == -1) 613 ipfw_socket = socket(AF_INET, SOCK_RAW, IPPROTO_RAW); 614 if (ipfw_socket < 0) 615 err(EX_UNAVAILABLE, "socket"); 616 617 op3->opcode = optname; 618 619 return (setsockopt(ipfw_socket, IPPROTO_IP, IP_FW3, op3, optlen)); 620 } 621 622 /* 623 * do_get3 - pass ipfw control cmd to kernel 624 * @optname: option name 625 * @optval: pointer to option data 626 * @optlen: pointer to option length 627 * 628 * Assumes op3 header is already embedded. 629 * Calls getsockopt() with IP_FW3 as kernel-visible opcode. 630 * Returns 0 on success or errno otherwise. 631 */ 632 int 633 do_get3(int optname, ip_fw3_opheader *op3, size_t *optlen) 634 { 635 int error; 636 socklen_t len; 637 638 if (co.test_only) 639 return (0); 640 641 if (ipfw_socket == -1) 642 ipfw_socket = socket(AF_INET, SOCK_RAW, IPPROTO_RAW); 643 if (ipfw_socket < 0) 644 err(EX_UNAVAILABLE, "socket"); 645 646 op3->opcode = optname; 647 648 len = *optlen; 649 error = getsockopt(ipfw_socket, IPPROTO_IP, IP_FW3, op3, &len); 650 *optlen = len; 651 652 return (error); 653 } 654 655 /** 656 * match_token takes a table and a string, returns the value associated 657 * with the string (-1 in case of failure). 658 */ 659 int 660 match_token(struct _s_x *table, const char *string) 661 { 662 struct _s_x *pt; 663 uint i = strlen(string); 664 665 for (pt = table ; i && pt->s != NULL ; pt++) 666 if (strlen(pt->s) == i && !bcmp(string, pt->s, i)) 667 return pt->x; 668 return (-1); 669 } 670 671 /** 672 * match_token_relaxed takes a table and a string, returns the value associated 673 * with the string for the best match. 674 * 675 * Returns: 676 * value from @table for matched records 677 * -1 for non-matched records 678 * -2 if more than one records match @string. 679 */ 680 int 681 match_token_relaxed(struct _s_x *table, const char *string) 682 { 683 struct _s_x *pt, *m; 684 int i, c; 685 686 i = strlen(string); 687 c = 0; 688 689 for (pt = table ; i != 0 && pt->s != NULL ; pt++) { 690 if (strncmp(pt->s, string, i) != 0) 691 continue; 692 m = pt; 693 c++; 694 } 695 696 if (c == 1) 697 return (m->x); 698 699 return (c > 0 ? -2: -1); 700 } 701 702 int 703 get_token(struct _s_x *table, const char *string, const char *errbase) 704 { 705 int tcmd; 706 707 if ((tcmd = match_token_relaxed(table, string)) < 0) 708 errx(EX_USAGE, "%s %s %s", 709 (tcmd == 0) ? "invalid" : "ambiguous", errbase, string); 710 711 return (tcmd); 712 } 713 714 /** 715 * match_value takes a table and a value, returns the string associated 716 * with the value (NULL in case of failure). 717 */ 718 char const * 719 match_value(struct _s_x *p, int value) 720 { 721 for (; p->s != NULL; p++) 722 if (p->x == value) 723 return p->s; 724 return NULL; 725 } 726 727 size_t 728 concat_tokens(char *buf, size_t bufsize, struct _s_x *table, char *delimiter) 729 { 730 struct _s_x *pt; 731 int l; 732 size_t sz; 733 734 for (sz = 0, pt = table ; pt->s != NULL; pt++) { 735 l = snprintf(buf + sz, bufsize - sz, "%s%s", 736 (sz == 0) ? "" : delimiter, pt->s); 737 sz += l; 738 bufsize += l; 739 if (sz > bufsize) 740 return (bufsize); 741 } 742 743 return (sz); 744 } 745 746 /* 747 * helper function to process a set of flags and set bits in the 748 * appropriate masks. 749 */ 750 int 751 fill_flags(struct _s_x *flags, char *p, char **e, uint32_t *set, 752 uint32_t *clear) 753 { 754 char *q; /* points to the separator */ 755 int val; 756 uint32_t *which; /* mask we are working on */ 757 758 while (p && *p) { 759 if (*p == '!') { 760 p++; 761 which = clear; 762 } else 763 which = set; 764 q = strchr(p, ','); 765 if (q) 766 *q++ = '\0'; 767 val = match_token(flags, p); 768 if (val <= 0) { 769 if (e != NULL) 770 *e = p; 771 return (-1); 772 } 773 *which |= (uint32_t)val; 774 p = q; 775 } 776 return (0); 777 } 778 779 void 780 print_flags_buffer(char *buf, size_t sz, struct _s_x *list, uint32_t set) 781 { 782 char const *comma = ""; 783 int i, l; 784 785 for (i = 0; list[i].x != 0; i++) { 786 if ((set & list[i].x) == 0) 787 continue; 788 789 set &= ~list[i].x; 790 l = snprintf(buf, sz, "%s%s", comma, list[i].s); 791 if (l >= sz) 792 return; 793 comma = ","; 794 buf += l; 795 sz -=l; 796 } 797 } 798 799 /* 800 * _substrcmp takes two strings and returns 1 if they do not match, 801 * and 0 if they match exactly or the first string is a sub-string 802 * of the second. A warning is printed to stderr in the case that the 803 * first string is a sub-string of the second. 804 * 805 * This function will be removed in the future through the usual 806 * deprecation process. 807 */ 808 int 809 _substrcmp(const char *str1, const char* str2) 810 { 811 812 if (strncmp(str1, str2, strlen(str1)) != 0) 813 return 1; 814 815 if (strlen(str1) != strlen(str2)) 816 warnx("DEPRECATED: '%s' matched '%s' as a sub-string", 817 str1, str2); 818 return 0; 819 } 820 821 /* 822 * _substrcmp2 takes three strings and returns 1 if the first two do not match, 823 * and 0 if they match exactly or the second string is a sub-string 824 * of the first. A warning is printed to stderr in the case that the 825 * first string does not match the third. 826 * 827 * This function exists to warn about the bizarre construction 828 * strncmp(str, "by", 2) which is used to allow people to use a shortcut 829 * for "bytes". The problem is that in addition to accepting "by", 830 * "byt", "byte", and "bytes", it also excepts "by_rabid_dogs" and any 831 * other string beginning with "by". 832 * 833 * This function will be removed in the future through the usual 834 * deprecation process. 835 */ 836 int 837 _substrcmp2(const char *str1, const char* str2, const char* str3) 838 { 839 840 if (strncmp(str1, str2, strlen(str2)) != 0) 841 return 1; 842 843 if (strcmp(str1, str3) != 0) 844 warnx("DEPRECATED: '%s' matched '%s'", 845 str1, str3); 846 return 0; 847 } 848 849 /* 850 * prints one port, symbolic or numeric 851 */ 852 static void 853 print_port(struct buf_pr *bp, int proto, uint16_t port) 854 { 855 856 if (proto == IPPROTO_ETHERTYPE) { 857 char const *s; 858 859 if (co.do_resolv && (s = match_value(ether_types, port)) ) 860 bprintf(bp, "%s", s); 861 else 862 bprintf(bp, "0x%04x", port); 863 } else { 864 struct servent *se = NULL; 865 if (co.do_resolv) { 866 struct protoent *pe = getprotobynumber(proto); 867 868 se = getservbyport(htons(port), pe ? pe->p_name : NULL); 869 } 870 if (se) 871 bprintf(bp, "%s", se->s_name); 872 else 873 bprintf(bp, "%d", port); 874 } 875 } 876 877 static struct _s_x _port_name[] = { 878 {"dst-port", O_IP_DSTPORT}, 879 {"src-port", O_IP_SRCPORT}, 880 {"ipid", O_IPID}, 881 {"iplen", O_IPLEN}, 882 {"ipttl", O_IPTTL}, 883 {"mac-type", O_MAC_TYPE}, 884 {"tcpdatalen", O_TCPDATALEN}, 885 {"tcpmss", O_TCPMSS}, 886 {"tcpwin", O_TCPWIN}, 887 {"tagged", O_TAGGED}, 888 {NULL, 0} 889 }; 890 891 /* 892 * Print the values in a list 16-bit items of the types above. 893 * XXX todo: add support for mask. 894 */ 895 static void 896 print_newports(struct buf_pr *bp, ipfw_insn_u16 *cmd, int proto, int opcode) 897 { 898 uint16_t *p = cmd->ports; 899 int i; 900 char const *sep; 901 902 if (opcode != 0) { 903 sep = match_value(_port_name, opcode); 904 if (sep == NULL) 905 sep = "???"; 906 bprintf(bp, " %s", sep); 907 } 908 sep = " "; 909 for (i = F_LEN((ipfw_insn *)cmd) - 1; i > 0; i--, p += 2) { 910 bprintf(bp, "%s", sep); 911 print_port(bp, proto, p[0]); 912 if (p[0] != p[1]) { 913 bprintf(bp, "-"); 914 print_port(bp, proto, p[1]); 915 } 916 sep = ","; 917 } 918 } 919 920 /* 921 * Like strtol, but also translates service names into port numbers 922 * for some protocols. 923 * In particular: 924 * proto == -1 disables the protocol check; 925 * proto == IPPROTO_ETHERTYPE looks up an internal table 926 * proto == <some value in /etc/protocols> matches the values there. 927 * Returns *end == s in case the parameter is not found. 928 */ 929 static int 930 strtoport(char *s, char **end, int base, int proto) 931 { 932 char *p, *buf; 933 char *s1; 934 int i; 935 936 *end = s; /* default - not found */ 937 if (*s == '\0') 938 return 0; /* not found */ 939 940 if (isdigit(*s)) 941 return strtol(s, end, base); 942 943 /* 944 * find separator. '\\' escapes the next char. 945 */ 946 for (s1 = s; *s1 && (isalnum(*s1) || *s1 == '\\' || 947 *s1 == '_' || *s1 == '.') ; s1++) 948 if (*s1 == '\\' && s1[1] != '\0') 949 s1++; 950 951 buf = safe_calloc(s1 - s + 1, 1); 952 953 /* 954 * copy into a buffer skipping backslashes 955 */ 956 for (p = s, i = 0; p != s1 ; p++) 957 if (*p != '\\') 958 buf[i++] = *p; 959 buf[i++] = '\0'; 960 961 if (proto == IPPROTO_ETHERTYPE) { 962 i = match_token(ether_types, buf); 963 free(buf); 964 if (i != -1) { /* found */ 965 *end = s1; 966 return i; 967 } 968 } else { 969 struct protoent *pe = NULL; 970 struct servent *se; 971 972 if (proto != 0) 973 pe = getprotobynumber(proto); 974 setservent(1); 975 se = getservbyname(buf, pe ? pe->p_name : NULL); 976 free(buf); 977 if (se != NULL) { 978 *end = s1; 979 return ntohs(se->s_port); 980 } 981 } 982 return 0; /* not found */ 983 } 984 985 /* 986 * Fill the body of the command with the list of port ranges. 987 */ 988 static int 989 fill_newports(ipfw_insn_u16 *cmd, char *av, int proto, int cblen) 990 { 991 uint16_t a, b, *p = cmd->ports; 992 int i = 0; 993 char *s = av; 994 995 while (*s) { 996 a = strtoport(av, &s, 0, proto); 997 if (s == av) /* empty or invalid argument */ 998 return (0); 999 1000 CHECK_LENGTH(cblen, i + 2); 1001 1002 switch (*s) { 1003 case '-': /* a range */ 1004 av = s + 1; 1005 b = strtoport(av, &s, 0, proto); 1006 /* Reject expressions like '1-abc' or '1-2-3'. */ 1007 if (s == av || (*s != ',' && *s != '\0')) 1008 return (0); 1009 p[0] = a; 1010 p[1] = b; 1011 break; 1012 case ',': /* comma separated list */ 1013 case '\0': 1014 p[0] = p[1] = a; 1015 break; 1016 default: 1017 warnx("port list: invalid separator <%c> in <%s>", 1018 *s, av); 1019 return (0); 1020 } 1021 1022 i++; 1023 p += 2; 1024 av = s + 1; 1025 } 1026 if (i > 0) { 1027 if (i + 1 > F_LEN_MASK) 1028 errx(EX_DATAERR, "too many ports/ranges\n"); 1029 cmd->o.len |= i + 1; /* leave F_NOT and F_OR untouched */ 1030 } 1031 return (i); 1032 } 1033 1034 /* 1035 * Fill the body of the command with the list of DiffServ codepoints. 1036 */ 1037 static void 1038 fill_dscp(ipfw_insn *cmd, char *av, int cblen) 1039 { 1040 uint32_t *low, *high; 1041 char *s = av, *a; 1042 int code; 1043 1044 cmd->opcode = O_DSCP; 1045 cmd->len |= F_INSN_SIZE(ipfw_insn_u32) + 1; 1046 1047 CHECK_CMDLEN; 1048 1049 low = (uint32_t *)(cmd + 1); 1050 high = low + 1; 1051 1052 *low = 0; 1053 *high = 0; 1054 1055 while (s != NULL) { 1056 a = strchr(s, ','); 1057 1058 if (a != NULL) 1059 *a++ = '\0'; 1060 1061 if (isalpha(*s)) { 1062 if ((code = match_token(f_ipdscp, s)) == -1) 1063 errx(EX_DATAERR, "Unknown DSCP code"); 1064 } else { 1065 code = strtoul(s, NULL, 10); 1066 if (code < 0 || code > 63) 1067 errx(EX_DATAERR, "Invalid DSCP value"); 1068 } 1069 1070 if (code >= 32) 1071 *high |= 1 << (code - 32); 1072 else 1073 *low |= 1 << code; 1074 1075 s = a; 1076 } 1077 } 1078 1079 static struct _s_x icmpcodes[] = { 1080 { "net", ICMP_UNREACH_NET }, 1081 { "host", ICMP_UNREACH_HOST }, 1082 { "protocol", ICMP_UNREACH_PROTOCOL }, 1083 { "port", ICMP_UNREACH_PORT }, 1084 { "needfrag", ICMP_UNREACH_NEEDFRAG }, 1085 { "srcfail", ICMP_UNREACH_SRCFAIL }, 1086 { "net-unknown", ICMP_UNREACH_NET_UNKNOWN }, 1087 { "host-unknown", ICMP_UNREACH_HOST_UNKNOWN }, 1088 { "isolated", ICMP_UNREACH_ISOLATED }, 1089 { "net-prohib", ICMP_UNREACH_NET_PROHIB }, 1090 { "host-prohib", ICMP_UNREACH_HOST_PROHIB }, 1091 { "tosnet", ICMP_UNREACH_TOSNET }, 1092 { "toshost", ICMP_UNREACH_TOSHOST }, 1093 { "filter-prohib", ICMP_UNREACH_FILTER_PROHIB }, 1094 { "host-precedence", ICMP_UNREACH_HOST_PRECEDENCE }, 1095 { "precedence-cutoff", ICMP_UNREACH_PRECEDENCE_CUTOFF }, 1096 { NULL, 0 } 1097 }; 1098 1099 static void 1100 fill_reject_code(u_short *codep, char *str) 1101 { 1102 int val; 1103 char *s; 1104 1105 val = strtoul(str, &s, 0); 1106 if (s == str || *s != '\0' || val >= 0x100) 1107 val = match_token(icmpcodes, str); 1108 if (val < 0) 1109 errx(EX_DATAERR, "unknown ICMP unreachable code ``%s''", str); 1110 *codep = val; 1111 return; 1112 } 1113 1114 static void 1115 print_reject_code(struct buf_pr *bp, uint16_t code) 1116 { 1117 char const *s; 1118 1119 if ((s = match_value(icmpcodes, code)) != NULL) 1120 bprintf(bp, "unreach %s", s); 1121 else 1122 bprintf(bp, "unreach %u", code); 1123 } 1124 1125 /* 1126 * Returns the number of bits set (from left) in a contiguous bitmask, 1127 * or -1 if the mask is not contiguous. 1128 * XXX this needs a proper fix. 1129 * This effectively works on masks in big-endian (network) format. 1130 * when compiled on little endian architectures. 1131 * 1132 * First bit is bit 7 of the first byte -- note, for MAC addresses, 1133 * the first bit on the wire is bit 0 of the first byte. 1134 * len is the max length in bits. 1135 */ 1136 int 1137 contigmask(uint8_t *p, int len) 1138 { 1139 int i, n; 1140 1141 for (i=0; i<len ; i++) 1142 if ( (p[i/8] & (1 << (7 - (i%8)))) == 0) /* first bit unset */ 1143 break; 1144 for (n=i+1; n < len; n++) 1145 if ( (p[n/8] & (1 << (7 - (n%8)))) != 0) 1146 return -1; /* mask not contiguous */ 1147 return i; 1148 } 1149 1150 /* 1151 * print flags set/clear in the two bitmasks passed as parameters. 1152 * There is a specialized check for f_tcpflags. 1153 */ 1154 static void 1155 print_flags(struct buf_pr *bp, char const *name, ipfw_insn *cmd, 1156 struct _s_x *list) 1157 { 1158 char const *comma = ""; 1159 int i; 1160 uint8_t set = cmd->arg1 & 0xff; 1161 uint8_t clear = (cmd->arg1 >> 8) & 0xff; 1162 1163 if (list == f_tcpflags && set == TH_SYN && clear == TH_ACK) { 1164 bprintf(bp, " setup"); 1165 return; 1166 } 1167 1168 bprintf(bp, " %s ", name); 1169 for (i=0; list[i].x != 0; i++) { 1170 if (set & list[i].x) { 1171 set &= ~list[i].x; 1172 bprintf(bp, "%s%s", comma, list[i].s); 1173 comma = ","; 1174 } 1175 if (clear & list[i].x) { 1176 clear &= ~list[i].x; 1177 bprintf(bp, "%s!%s", comma, list[i].s); 1178 comma = ","; 1179 } 1180 } 1181 } 1182 1183 1184 /* 1185 * Print the ip address contained in a command. 1186 */ 1187 static void 1188 print_ip(struct buf_pr *bp, const struct format_opts *fo, ipfw_insn_ip *cmd) 1189 { 1190 struct hostent *he = NULL; 1191 struct in_addr *ia; 1192 uint32_t len = F_LEN((ipfw_insn *)cmd); 1193 uint32_t *a = ((ipfw_insn_u32 *)cmd)->d; 1194 char *t; 1195 1196 bprintf(bp, " "); 1197 if (cmd->o.opcode == O_IP_DST_LOOKUP && len > F_INSN_SIZE(ipfw_insn_u32)) { 1198 uint32_t d = a[1]; 1199 const char *arg = "<invalid>"; 1200 1201 if (d < sizeof(lookup_key)/sizeof(lookup_key[0])) 1202 arg = match_value(rule_options, lookup_key[d]); 1203 t = table_search_ctlv(fo->tstate, ((ipfw_insn *)cmd)->arg1); 1204 bprintf(bp, "lookup %s %s", arg, t); 1205 return; 1206 } 1207 if (cmd->o.opcode == O_IP_SRC_ME || cmd->o.opcode == O_IP_DST_ME) { 1208 bprintf(bp, "me"); 1209 return; 1210 } 1211 if (cmd->o.opcode == O_IP_SRC_LOOKUP || 1212 cmd->o.opcode == O_IP_DST_LOOKUP) { 1213 t = table_search_ctlv(fo->tstate, ((ipfw_insn *)cmd)->arg1); 1214 bprintf(bp, "table(%s", t); 1215 if (len == F_INSN_SIZE(ipfw_insn_u32)) 1216 bprintf(bp, ",%u", *a); 1217 bprintf(bp, ")"); 1218 return; 1219 } 1220 if (cmd->o.opcode == O_IP_SRC_SET || cmd->o.opcode == O_IP_DST_SET) { 1221 uint32_t x, *map = (uint32_t *)&(cmd->mask); 1222 int i, j; 1223 char comma = '{'; 1224 1225 x = cmd->o.arg1 - 1; 1226 x = htonl( ~x ); 1227 cmd->addr.s_addr = htonl(cmd->addr.s_addr); 1228 bprintf(bp, "%s/%d", inet_ntoa(cmd->addr), 1229 contigmask((uint8_t *)&x, 32)); 1230 x = cmd->addr.s_addr = htonl(cmd->addr.s_addr); 1231 x &= 0xff; /* base */ 1232 /* 1233 * Print bits and ranges. 1234 * Locate first bit set (i), then locate first bit unset (j). 1235 * If we have 3+ consecutive bits set, then print them as a 1236 * range, otherwise only print the initial bit and rescan. 1237 */ 1238 for (i=0; i < cmd->o.arg1; i++) 1239 if (map[i/32] & (1<<(i & 31))) { 1240 for (j=i+1; j < cmd->o.arg1; j++) 1241 if (!(map[ j/32] & (1<<(j & 31)))) 1242 break; 1243 bprintf(bp, "%c%d", comma, i+x); 1244 if (j>i+2) { /* range has at least 3 elements */ 1245 bprintf(bp, "-%d", j-1+x); 1246 i = j-1; 1247 } 1248 comma = ','; 1249 } 1250 bprintf(bp, "}"); 1251 return; 1252 } 1253 /* 1254 * len == 2 indicates a single IP, whereas lists of 1 or more 1255 * addr/mask pairs have len = (2n+1). We convert len to n so we 1256 * use that to count the number of entries. 1257 */ 1258 for (len = len / 2; len > 0; len--, a += 2) { 1259 int mb = /* mask length */ 1260 (cmd->o.opcode == O_IP_SRC || cmd->o.opcode == O_IP_DST) ? 1261 32 : contigmask((uint8_t *)&(a[1]), 32); 1262 if (mb == 32 && co.do_resolv) 1263 he = gethostbyaddr((char *)&(a[0]), sizeof(in_addr_t), 1264 AF_INET); 1265 if (he != NULL) /* resolved to name */ 1266 bprintf(bp, "%s", he->h_name); 1267 else if (mb == 0) /* any */ 1268 bprintf(bp, "any"); 1269 else { /* numeric IP followed by some kind of mask */ 1270 ia = (struct in_addr *)&a[0]; 1271 bprintf(bp, "%s", inet_ntoa(*ia)); 1272 if (mb < 0) { 1273 ia = (struct in_addr *)&a[1]; 1274 bprintf(bp, ":%s", inet_ntoa(*ia)); 1275 } else if (mb < 32) 1276 bprintf(bp, "/%d", mb); 1277 } 1278 if (len > 1) 1279 bprintf(bp, ","); 1280 } 1281 } 1282 1283 /* 1284 * prints a MAC address/mask pair 1285 */ 1286 static void 1287 format_mac(struct buf_pr *bp, uint8_t *addr, uint8_t *mask) 1288 { 1289 int l = contigmask(mask, 48); 1290 1291 if (l == 0) 1292 bprintf(bp, " any"); 1293 else { 1294 bprintf(bp, " %02x:%02x:%02x:%02x:%02x:%02x", 1295 addr[0], addr[1], addr[2], addr[3], addr[4], addr[5]); 1296 if (l == -1) 1297 bprintf(bp, "&%02x:%02x:%02x:%02x:%02x:%02x", 1298 mask[0], mask[1], mask[2], 1299 mask[3], mask[4], mask[5]); 1300 else if (l < 48) 1301 bprintf(bp, "/%d", l); 1302 } 1303 } 1304 1305 static void 1306 print_mac(struct buf_pr *bp, ipfw_insn_mac *mac) 1307 { 1308 1309 bprintf(bp, " MAC"); 1310 format_mac(bp, mac->addr, mac->mask); 1311 format_mac(bp, mac->addr + 6, mac->mask + 6); 1312 } 1313 1314 static void 1315 fill_icmptypes(ipfw_insn_u32 *cmd, char *av) 1316 { 1317 uint8_t type; 1318 1319 cmd->d[0] = 0; 1320 while (*av) { 1321 if (*av == ',') 1322 av++; 1323 1324 type = strtoul(av, &av, 0); 1325 1326 if (*av != ',' && *av != '\0') 1327 errx(EX_DATAERR, "invalid ICMP type"); 1328 1329 if (type > 31) 1330 errx(EX_DATAERR, "ICMP type out of range"); 1331 1332 cmd->d[0] |= 1 << type; 1333 } 1334 cmd->o.opcode = O_ICMPTYPE; 1335 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32); 1336 } 1337 1338 static void 1339 print_icmptypes(struct buf_pr *bp, ipfw_insn_u32 *cmd) 1340 { 1341 int i; 1342 char sep= ' '; 1343 1344 bprintf(bp, " icmptypes"); 1345 for (i = 0; i < 32; i++) { 1346 if ( (cmd->d[0] & (1 << (i))) == 0) 1347 continue; 1348 bprintf(bp, "%c%d", sep, i); 1349 sep = ','; 1350 } 1351 } 1352 1353 static void 1354 print_dscp(struct buf_pr *bp, ipfw_insn_u32 *cmd) 1355 { 1356 int i = 0; 1357 uint32_t *v; 1358 char sep= ' '; 1359 const char *code; 1360 1361 bprintf(bp, " dscp"); 1362 v = cmd->d; 1363 while (i < 64) { 1364 if (*v & (1 << i)) { 1365 if ((code = match_value(f_ipdscp, i)) != NULL) 1366 bprintf(bp, "%c%s", sep, code); 1367 else 1368 bprintf(bp, "%c%d", sep, i); 1369 sep = ','; 1370 } 1371 1372 if ((++i % 32) == 0) 1373 v++; 1374 } 1375 } 1376 1377 #define insntod(cmd, type) ((ipfw_insn_ ## type *)(cmd)) 1378 struct show_state { 1379 struct ip_fw_rule *rule; 1380 const ipfw_insn *eaction; 1381 uint8_t *printed; 1382 int flags; 1383 #define HAVE_PROTO 0x0001 1384 #define HAVE_SRCIP 0x0002 1385 #define HAVE_DSTIP 0x0004 1386 #define HAVE_PROBE_STATE 0x0008 1387 int proto; 1388 int or_block; 1389 }; 1390 1391 static int 1392 init_show_state(struct show_state *state, struct ip_fw_rule *rule) 1393 { 1394 1395 state->printed = calloc(rule->cmd_len, sizeof(uint8_t)); 1396 if (state->printed == NULL) 1397 return (ENOMEM); 1398 state->rule = rule; 1399 state->eaction = NULL; 1400 state->flags = 0; 1401 state->proto = 0; 1402 state->or_block = 0; 1403 return (0); 1404 } 1405 1406 static void 1407 free_show_state(struct show_state *state) 1408 { 1409 1410 free(state->printed); 1411 } 1412 1413 static uint8_t 1414 is_printed_opcode(struct show_state *state, const ipfw_insn *cmd) 1415 { 1416 1417 return (state->printed[cmd - state->rule->cmd]); 1418 } 1419 1420 static void 1421 mark_printed(struct show_state *state, const ipfw_insn *cmd) 1422 { 1423 1424 state->printed[cmd - state->rule->cmd] = 1; 1425 } 1426 1427 static void 1428 print_limit_mask(struct buf_pr *bp, const ipfw_insn_limit *limit) 1429 { 1430 struct _s_x *p = limit_masks; 1431 char const *comma = " "; 1432 uint8_t x; 1433 1434 for (x = limit->limit_mask; p->x != 0; p++) { 1435 if ((x & p->x) == p->x) { 1436 x &= ~p->x; 1437 bprintf(bp, "%s%s", comma, p->s); 1438 comma = ","; 1439 } 1440 } 1441 bprint_uint_arg(bp, " ", limit->conn_limit); 1442 } 1443 1444 static int 1445 print_instruction(struct buf_pr *bp, const struct format_opts *fo, 1446 struct show_state *state, ipfw_insn *cmd) 1447 { 1448 struct protoent *pe; 1449 struct passwd *pwd; 1450 struct group *grp; 1451 const char *s; 1452 double d; 1453 1454 if (is_printed_opcode(state, cmd)) 1455 return (0); 1456 if ((cmd->len & F_OR) != 0 && state->or_block == 0) 1457 bprintf(bp, " {"); 1458 if (cmd->opcode != O_IN && (cmd->len & F_NOT) != 0) 1459 bprintf(bp, " not"); 1460 1461 switch (cmd->opcode) { 1462 case O_PROB: 1463 d = 1.0 * insntod(cmd, u32)->d[0] / 0x7fffffff; 1464 bprintf(bp, "prob %f ", d); 1465 break; 1466 case O_PROBE_STATE: /* no need to print anything here */ 1467 state->flags |= HAVE_PROBE_STATE; 1468 break; 1469 case O_IP_SRC: 1470 case O_IP_SRC_LOOKUP: 1471 case O_IP_SRC_MASK: 1472 case O_IP_SRC_ME: 1473 case O_IP_SRC_SET: 1474 if (state->flags & HAVE_SRCIP) 1475 bprintf(bp, " src-ip"); 1476 print_ip(bp, fo, insntod(cmd, ip)); 1477 break; 1478 case O_IP_DST: 1479 case O_IP_DST_LOOKUP: 1480 case O_IP_DST_MASK: 1481 case O_IP_DST_ME: 1482 case O_IP_DST_SET: 1483 if (state->flags & HAVE_DSTIP) 1484 bprintf(bp, " dst-ip"); 1485 print_ip(bp, fo, insntod(cmd, ip)); 1486 break; 1487 case O_IP6_SRC: 1488 case O_IP6_SRC_MASK: 1489 case O_IP6_SRC_ME: 1490 if (state->flags & HAVE_SRCIP) 1491 bprintf(bp, " src-ip6"); 1492 print_ip6(bp, insntod(cmd, ip6)); 1493 break; 1494 case O_IP6_DST: 1495 case O_IP6_DST_MASK: 1496 case O_IP6_DST_ME: 1497 if (state->flags & HAVE_DSTIP) 1498 bprintf(bp, " dst-ip6"); 1499 print_ip6(bp, insntod(cmd, ip6)); 1500 break; 1501 case O_FLOW6ID: 1502 print_flow6id(bp, insntod(cmd, u32)); 1503 break; 1504 case O_IP_DSTPORT: 1505 case O_IP_SRCPORT: 1506 print_newports(bp, insntod(cmd, u16), state->proto, 1507 (state->flags & (HAVE_SRCIP | HAVE_DSTIP)) == 1508 (HAVE_SRCIP | HAVE_DSTIP) ? cmd->opcode: 0); 1509 break; 1510 case O_PROTO: 1511 pe = getprotobynumber(cmd->arg1); 1512 if (state->flags & HAVE_PROTO) 1513 bprintf(bp, " proto"); 1514 if (pe != NULL) 1515 bprintf(bp, " %s", pe->p_name); 1516 else 1517 bprintf(bp, " %u", cmd->arg1); 1518 state->proto = cmd->arg1; 1519 break; 1520 case O_MACADDR2: 1521 print_mac(bp, insntod(cmd, mac)); 1522 break; 1523 case O_MAC_TYPE: 1524 print_newports(bp, insntod(cmd, u16), 1525 IPPROTO_ETHERTYPE, cmd->opcode); 1526 break; 1527 case O_FRAG: 1528 bprintf(bp, " frag"); 1529 break; 1530 case O_FIB: 1531 bprintf(bp, " fib %u", cmd->arg1); 1532 break; 1533 case O_SOCKARG: 1534 bprintf(bp, " sockarg"); 1535 break; 1536 case O_IN: 1537 bprintf(bp, cmd->len & F_NOT ? " out" : " in"); 1538 break; 1539 case O_DIVERTED: 1540 switch (cmd->arg1) { 1541 case 3: 1542 bprintf(bp, " diverted"); 1543 break; 1544 case 2: 1545 bprintf(bp, " diverted-output"); 1546 break; 1547 case 1: 1548 bprintf(bp, " diverted-loopback"); 1549 break; 1550 default: 1551 bprintf(bp, " diverted-?<%u>", cmd->arg1); 1552 break; 1553 } 1554 break; 1555 case O_LAYER2: 1556 bprintf(bp, " layer2"); 1557 break; 1558 case O_XMIT: 1559 case O_RECV: 1560 case O_VIA: 1561 if (cmd->opcode == O_XMIT) 1562 s = "xmit"; 1563 else if (cmd->opcode == O_RECV) 1564 s = "recv"; 1565 else /* if (cmd->opcode == O_VIA) */ 1566 s = "via"; 1567 switch (insntod(cmd, if)->name[0]) { 1568 case '\0': 1569 bprintf(bp, " %s %s", s, 1570 inet_ntoa(insntod(cmd, if)->p.ip)); 1571 break; 1572 case '\1': 1573 bprintf(bp, " %s table(%s)", s, 1574 table_search_ctlv(fo->tstate, 1575 insntod(cmd, if)->p.kidx)); 1576 break; 1577 default: 1578 bprintf(bp, " %s %s", s, 1579 insntod(cmd, if)->name); 1580 } 1581 break; 1582 case O_IP_FLOW_LOOKUP: 1583 s = table_search_ctlv(fo->tstate, cmd->arg1); 1584 bprintf(bp, " flow table(%s", s); 1585 if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_u32)) 1586 bprintf(bp, ",%u", insntod(cmd, u32)->d[0]); 1587 bprintf(bp, ")"); 1588 break; 1589 case O_IPID: 1590 case O_IPTTL: 1591 case O_IPLEN: 1592 case O_TCPDATALEN: 1593 case O_TCPMSS: 1594 case O_TCPWIN: 1595 if (F_LEN(cmd) == 1) { 1596 switch (cmd->opcode) { 1597 case O_IPID: 1598 s = "ipid"; 1599 break; 1600 case O_IPTTL: 1601 s = "ipttl"; 1602 break; 1603 case O_IPLEN: 1604 s = "iplen"; 1605 break; 1606 case O_TCPDATALEN: 1607 s = "tcpdatalen"; 1608 break; 1609 case O_TCPMSS: 1610 s = "tcpmss"; 1611 break; 1612 case O_TCPWIN: 1613 s = "tcpwin"; 1614 break; 1615 } 1616 bprintf(bp, " %s %u", s, cmd->arg1); 1617 } else 1618 print_newports(bp, insntod(cmd, u16), 0, 1619 cmd->opcode); 1620 break; 1621 case O_IPVER: 1622 bprintf(bp, " ipver %u", cmd->arg1); 1623 break; 1624 case O_IPPRECEDENCE: 1625 bprintf(bp, " ipprecedence %u", cmd->arg1 >> 5); 1626 break; 1627 case O_DSCP: 1628 print_dscp(bp, insntod(cmd, u32)); 1629 break; 1630 case O_IPOPT: 1631 print_flags(bp, "ipoptions", cmd, f_ipopts); 1632 break; 1633 case O_IPTOS: 1634 print_flags(bp, "iptos", cmd, f_iptos); 1635 break; 1636 case O_ICMPTYPE: 1637 print_icmptypes(bp, insntod(cmd, u32)); 1638 break; 1639 case O_ESTAB: 1640 bprintf(bp, " established"); 1641 break; 1642 case O_TCPFLAGS: 1643 print_flags(bp, "tcpflags", cmd, f_tcpflags); 1644 break; 1645 case O_TCPOPTS: 1646 print_flags(bp, "tcpoptions", cmd, f_tcpopts); 1647 break; 1648 case O_TCPACK: 1649 bprintf(bp, " tcpack %d", 1650 ntohl(insntod(cmd, u32)->d[0])); 1651 break; 1652 case O_TCPSEQ: 1653 bprintf(bp, " tcpseq %d", 1654 ntohl(insntod(cmd, u32)->d[0])); 1655 break; 1656 case O_UID: 1657 pwd = getpwuid(insntod(cmd, u32)->d[0]); 1658 if (pwd != NULL) 1659 bprintf(bp, " uid %s", pwd->pw_name); 1660 else 1661 bprintf(bp, " uid %u", 1662 insntod(cmd, u32)->d[0]); 1663 break; 1664 case O_GID: 1665 grp = getgrgid(insntod(cmd, u32)->d[0]); 1666 if (grp != NULL) 1667 bprintf(bp, " gid %s", grp->gr_name); 1668 else 1669 bprintf(bp, " gid %u", 1670 insntod(cmd, u32)->d[0]); 1671 break; 1672 case O_JAIL: 1673 bprintf(bp, " jail %d", insntod(cmd, u32)->d[0]); 1674 break; 1675 case O_VERREVPATH: 1676 bprintf(bp, " verrevpath"); 1677 break; 1678 case O_VERSRCREACH: 1679 bprintf(bp, " versrcreach"); 1680 break; 1681 case O_ANTISPOOF: 1682 bprintf(bp, " antispoof"); 1683 break; 1684 case O_IPSEC: 1685 bprintf(bp, " ipsec"); 1686 break; 1687 case O_NOP: 1688 bprintf(bp, " // %s", (char *)(cmd + 1)); 1689 break; 1690 case O_KEEP_STATE: 1691 if (state->flags & HAVE_PROBE_STATE) 1692 bprintf(bp, " keep-state"); 1693 else 1694 bprintf(bp, " record-state"); 1695 bprintf(bp, " :%s", 1696 object_search_ctlv(fo->tstate, cmd->arg1, 1697 IPFW_TLV_STATE_NAME)); 1698 break; 1699 case O_LIMIT: 1700 if (state->flags & HAVE_PROBE_STATE) 1701 bprintf(bp, " limit"); 1702 else 1703 bprintf(bp, " set-limit"); 1704 print_limit_mask(bp, insntod(cmd, limit)); 1705 bprintf(bp, " :%s", 1706 object_search_ctlv(fo->tstate, cmd->arg1, 1707 IPFW_TLV_STATE_NAME)); 1708 break; 1709 case O_IP6: 1710 if (state->flags & HAVE_PROTO) 1711 bprintf(bp, " proto"); 1712 bprintf(bp, " ip6"); 1713 break; 1714 case O_IP4: 1715 if (state->flags & HAVE_PROTO) 1716 bprintf(bp, " proto"); 1717 bprintf(bp, " ip4"); 1718 break; 1719 case O_ICMP6TYPE: 1720 print_icmp6types(bp, insntod(cmd, u32)); 1721 break; 1722 case O_EXT_HDR: 1723 print_ext6hdr(bp, cmd); 1724 break; 1725 case O_TAGGED: 1726 if (F_LEN(cmd) == 1) 1727 bprint_uint_arg(bp, " tagged ", cmd->arg1); 1728 else 1729 print_newports(bp, insntod(cmd, u16), 1730 0, O_TAGGED); 1731 break; 1732 case O_SKIP_ACTION: 1733 bprintf(bp, " defer-immediate-action"); 1734 break; 1735 default: 1736 bprintf(bp, " [opcode %d len %d]", cmd->opcode, 1737 cmd->len); 1738 } 1739 if (cmd->len & F_OR) { 1740 bprintf(bp, " or"); 1741 state->or_block = 1; 1742 } else if (state->or_block != 0) { 1743 bprintf(bp, " }"); 1744 state->or_block = 0; 1745 } 1746 mark_printed(state, cmd); 1747 1748 return (1); 1749 } 1750 1751 static ipfw_insn * 1752 print_opcode(struct buf_pr *bp, struct format_opts *fo, 1753 struct show_state *state, int opcode) 1754 { 1755 ipfw_insn *cmd; 1756 int l; 1757 1758 for (l = state->rule->act_ofs, cmd = state->rule->cmd; 1759 l > 0; l -= F_LEN(cmd), cmd += F_LEN(cmd)) { 1760 /* We use zero opcode to print the rest of options */ 1761 if (opcode >= 0 && cmd->opcode != opcode) 1762 continue; 1763 /* 1764 * Skip O_NOP, when we printing the rest 1765 * of options, it will be handled separately. 1766 */ 1767 if (cmd->opcode == O_NOP && opcode != O_NOP) 1768 continue; 1769 if (!print_instruction(bp, fo, state, cmd)) 1770 continue; 1771 return (cmd); 1772 } 1773 return (NULL); 1774 } 1775 1776 static void 1777 print_fwd(struct buf_pr *bp, const ipfw_insn *cmd) 1778 { 1779 char buf[INET6_ADDRSTRLEN + IF_NAMESIZE + 2]; 1780 ipfw_insn_sa6 *sa6; 1781 ipfw_insn_sa *sa; 1782 uint16_t port; 1783 1784 if (cmd->opcode == O_FORWARD_IP) { 1785 sa = insntod(cmd, sa); 1786 port = sa->sa.sin_port; 1787 if (sa->sa.sin_addr.s_addr == INADDR_ANY) 1788 bprintf(bp, "fwd tablearg"); 1789 else 1790 bprintf(bp, "fwd %s", inet_ntoa(sa->sa.sin_addr)); 1791 } else { 1792 sa6 = insntod(cmd, sa6); 1793 port = sa6->sa.sin6_port; 1794 bprintf(bp, "fwd "); 1795 if (getnameinfo((const struct sockaddr *)&sa6->sa, 1796 sizeof(struct sockaddr_in6), buf, sizeof(buf), NULL, 0, 1797 NI_NUMERICHOST) == 0) 1798 bprintf(bp, "%s", buf); 1799 } 1800 if (port != 0) 1801 bprintf(bp, ",%u", port); 1802 } 1803 1804 static int 1805 print_action_instruction(struct buf_pr *bp, const struct format_opts *fo, 1806 struct show_state *state, const ipfw_insn *cmd) 1807 { 1808 const char *s; 1809 1810 if (is_printed_opcode(state, cmd)) 1811 return (0); 1812 switch (cmd->opcode) { 1813 case O_CHECK_STATE: 1814 bprintf(bp, "check-state"); 1815 if (cmd->arg1 != 0) 1816 s = object_search_ctlv(fo->tstate, cmd->arg1, 1817 IPFW_TLV_STATE_NAME); 1818 else 1819 s = NULL; 1820 bprintf(bp, " :%s", s ? s: "any"); 1821 break; 1822 case O_ACCEPT: 1823 bprintf(bp, "allow"); 1824 break; 1825 case O_COUNT: 1826 bprintf(bp, "count"); 1827 break; 1828 case O_DENY: 1829 bprintf(bp, "deny"); 1830 break; 1831 case O_REJECT: 1832 if (cmd->arg1 == ICMP_REJECT_RST) 1833 bprintf(bp, "reset"); 1834 else if (cmd->arg1 == ICMP_REJECT_ABORT) 1835 bprintf(bp, "abort"); 1836 else if (cmd->arg1 == ICMP_UNREACH_HOST) 1837 bprintf(bp, "reject"); 1838 else 1839 print_reject_code(bp, cmd->arg1); 1840 break; 1841 case O_UNREACH6: 1842 if (cmd->arg1 == ICMP6_UNREACH_RST) 1843 bprintf(bp, "reset6"); 1844 else if (cmd->arg1 == ICMP6_UNREACH_ABORT) 1845 bprintf(bp, "abort6"); 1846 else 1847 print_unreach6_code(bp, cmd->arg1); 1848 break; 1849 case O_SKIPTO: 1850 bprint_uint_arg(bp, "skipto ", cmd->arg1); 1851 break; 1852 case O_PIPE: 1853 bprint_uint_arg(bp, "pipe ", cmd->arg1); 1854 break; 1855 case O_QUEUE: 1856 bprint_uint_arg(bp, "queue ", cmd->arg1); 1857 break; 1858 case O_DIVERT: 1859 bprint_uint_arg(bp, "divert ", cmd->arg1); 1860 break; 1861 case O_TEE: 1862 bprint_uint_arg(bp, "tee ", cmd->arg1); 1863 break; 1864 case O_NETGRAPH: 1865 bprint_uint_arg(bp, "netgraph ", cmd->arg1); 1866 break; 1867 case O_NGTEE: 1868 bprint_uint_arg(bp, "ngtee ", cmd->arg1); 1869 break; 1870 case O_FORWARD_IP: 1871 case O_FORWARD_IP6: 1872 print_fwd(bp, cmd); 1873 break; 1874 case O_LOG: 1875 if (insntod(cmd, log)->max_log > 0) 1876 bprintf(bp, " log logamount %d", 1877 insntod(cmd, log)->max_log); 1878 else 1879 bprintf(bp, " log"); 1880 break; 1881 case O_ALTQ: 1882 #ifndef NO_ALTQ 1883 print_altq_cmd(bp, insntod(cmd, altq)); 1884 #endif 1885 break; 1886 case O_TAG: 1887 bprint_uint_arg(bp, cmd->len & F_NOT ? " untag ": 1888 " tag ", cmd->arg1); 1889 break; 1890 case O_NAT: 1891 if (cmd->arg1 != IP_FW_NAT44_GLOBAL) 1892 bprint_uint_arg(bp, "nat ", cmd->arg1); 1893 else 1894 bprintf(bp, "nat global"); 1895 break; 1896 case O_SETFIB: 1897 if (cmd->arg1 == IP_FW_TARG) 1898 bprint_uint_arg(bp, "setfib ", cmd->arg1); 1899 else 1900 bprintf(bp, "setfib %u", cmd->arg1 & 0x7FFF); 1901 break; 1902 case O_EXTERNAL_ACTION: 1903 /* 1904 * The external action can consists of two following 1905 * each other opcodes - O_EXTERNAL_ACTION and 1906 * O_EXTERNAL_INSTANCE. The first contains the ID of 1907 * name of external action. The second contains the ID 1908 * of name of external action instance. 1909 * NOTE: in case when external action has no named 1910 * instances support, the second opcode isn't needed. 1911 */ 1912 state->eaction = cmd; 1913 s = object_search_ctlv(fo->tstate, cmd->arg1, 1914 IPFW_TLV_EACTION); 1915 if (match_token(rule_eactions, s) != -1) 1916 bprintf(bp, "%s", s); 1917 else 1918 bprintf(bp, "eaction %s", s); 1919 break; 1920 case O_EXTERNAL_INSTANCE: 1921 if (state->eaction == NULL) 1922 break; 1923 /* 1924 * XXX: we need to teach ipfw(9) to rewrite opcodes 1925 * in the user buffer on rule addition. When we add 1926 * the rule, we specify zero TLV type for 1927 * O_EXTERNAL_INSTANCE object. To show correct 1928 * rule after `ipfw add` we need to search instance 1929 * name with zero type. But when we do `ipfw show` 1930 * we calculate TLV type using IPFW_TLV_EACTION_NAME() 1931 * macro. 1932 */ 1933 s = object_search_ctlv(fo->tstate, cmd->arg1, 0); 1934 if (s == NULL) 1935 s = object_search_ctlv(fo->tstate, 1936 cmd->arg1, IPFW_TLV_EACTION_NAME( 1937 state->eaction->arg1)); 1938 bprintf(bp, " %s", s); 1939 break; 1940 case O_EXTERNAL_DATA: 1941 if (state->eaction == NULL) 1942 break; 1943 /* 1944 * Currently we support data formatting only for 1945 * external data with datalen u16. For unknown data 1946 * print its size in bytes. 1947 */ 1948 if (cmd->len == F_INSN_SIZE(ipfw_insn)) 1949 bprintf(bp, " %u", cmd->arg1); 1950 else 1951 bprintf(bp, " %ubytes", 1952 cmd->len * sizeof(uint32_t)); 1953 break; 1954 case O_SETDSCP: 1955 if (cmd->arg1 == IP_FW_TARG) { 1956 bprintf(bp, "setdscp tablearg"); 1957 break; 1958 } 1959 s = match_value(f_ipdscp, cmd->arg1 & 0x3F); 1960 if (s != NULL) 1961 bprintf(bp, "setdscp %s", s); 1962 else 1963 bprintf(bp, "setdscp %u", cmd->arg1 & 0x3F); 1964 break; 1965 case O_REASS: 1966 bprintf(bp, "reass"); 1967 break; 1968 case O_CALLRETURN: 1969 if (cmd->len & F_NOT) 1970 bprintf(bp, "return"); 1971 else 1972 bprint_uint_arg(bp, "call ", cmd->arg1); 1973 break; 1974 default: 1975 bprintf(bp, "** unrecognized action %d len %d ", 1976 cmd->opcode, cmd->len); 1977 } 1978 mark_printed(state, cmd); 1979 1980 return (1); 1981 } 1982 1983 1984 static ipfw_insn * 1985 print_action(struct buf_pr *bp, struct format_opts *fo, 1986 struct show_state *state, uint8_t opcode) 1987 { 1988 ipfw_insn *cmd; 1989 int l; 1990 1991 for (l = state->rule->cmd_len - state->rule->act_ofs, 1992 cmd = ACTION_PTR(state->rule); l > 0; 1993 l -= F_LEN(cmd), cmd += F_LEN(cmd)) { 1994 if (cmd->opcode != opcode) 1995 continue; 1996 if (!print_action_instruction(bp, fo, state, cmd)) 1997 continue; 1998 return (cmd); 1999 } 2000 return (NULL); 2001 } 2002 2003 static void 2004 print_proto(struct buf_pr *bp, struct format_opts *fo, 2005 struct show_state *state) 2006 { 2007 ipfw_insn *cmd; 2008 int l, proto, ip4, ip6; 2009 2010 /* Count all O_PROTO, O_IP4, O_IP6 instructions. */ 2011 proto = ip4 = ip6 = 0; 2012 for (l = state->rule->act_ofs, cmd = state->rule->cmd; 2013 l > 0; l -= F_LEN(cmd), cmd += F_LEN(cmd)) { 2014 switch (cmd->opcode) { 2015 case O_PROTO: 2016 proto++; 2017 break; 2018 case O_IP4: 2019 ip4 = 1; 2020 if (cmd->len & F_OR) 2021 ip4++; 2022 break; 2023 case O_IP6: 2024 ip6 = 1; 2025 if (cmd->len & F_OR) 2026 ip6++; 2027 break; 2028 default: 2029 continue; 2030 } 2031 } 2032 if (proto == 0 && ip4 == 0 && ip6 == 0) { 2033 state->proto = IPPROTO_IP; 2034 state->flags |= HAVE_PROTO; 2035 bprintf(bp, " ip"); 2036 return; 2037 } 2038 /* To handle the case { ip4 or ip6 }, print opcode with F_OR first */ 2039 cmd = NULL; 2040 if (ip4 || ip6) 2041 cmd = print_opcode(bp, fo, state, ip4 > ip6 ? O_IP4: O_IP6); 2042 if (cmd != NULL && (cmd->len & F_OR)) 2043 cmd = print_opcode(bp, fo, state, ip4 > ip6 ? O_IP6: O_IP4); 2044 if (cmd == NULL || (cmd->len & F_OR)) 2045 for (l = proto; l > 0; l--) { 2046 cmd = print_opcode(bp, fo, state, O_PROTO); 2047 if (cmd == NULL || (cmd->len & F_OR) == 0) 2048 break; 2049 } 2050 /* Initialize proto, it is used by print_newports() */ 2051 state->flags |= HAVE_PROTO; 2052 if (state->proto == 0 && ip6 != 0) 2053 state->proto = IPPROTO_IPV6; 2054 } 2055 2056 static int 2057 match_opcode(int opcode, const int opcodes[], size_t nops) 2058 { 2059 int i; 2060 2061 for (i = 0; i < nops; i++) 2062 if (opcode == opcodes[i]) 2063 return (1); 2064 return (0); 2065 } 2066 2067 static void 2068 print_address(struct buf_pr *bp, struct format_opts *fo, 2069 struct show_state *state, const int opcodes[], size_t nops, int portop, 2070 int flag) 2071 { 2072 ipfw_insn *cmd; 2073 int count, l, portcnt, pf; 2074 2075 count = portcnt = 0; 2076 for (l = state->rule->act_ofs, cmd = state->rule->cmd; 2077 l > 0; l -= F_LEN(cmd), cmd += F_LEN(cmd)) { 2078 if (match_opcode(cmd->opcode, opcodes, nops)) 2079 count++; 2080 else if (cmd->opcode == portop) 2081 portcnt++; 2082 } 2083 if (count == 0) 2084 bprintf(bp, " any"); 2085 for (l = state->rule->act_ofs, cmd = state->rule->cmd; 2086 l > 0 && count > 0; l -= F_LEN(cmd), cmd += F_LEN(cmd)) { 2087 if (!match_opcode(cmd->opcode, opcodes, nops)) 2088 continue; 2089 print_instruction(bp, fo, state, cmd); 2090 if ((cmd->len & F_OR) == 0) 2091 break; 2092 count--; 2093 } 2094 /* 2095 * If several O_IP_?PORT opcodes specified, leave them to the 2096 * options section. 2097 */ 2098 if (portcnt == 1) { 2099 for (l = state->rule->act_ofs, cmd = state->rule->cmd, pf = 0; 2100 l > 0; l -= F_LEN(cmd), cmd += F_LEN(cmd)) { 2101 if (cmd->opcode != portop) { 2102 pf = (cmd->len & F_OR); 2103 continue; 2104 } 2105 /* Print opcode iff it is not in OR block. */ 2106 if (pf == 0 && (cmd->len & F_OR) == 0) 2107 print_instruction(bp, fo, state, cmd); 2108 break; 2109 } 2110 } 2111 state->flags |= flag; 2112 } 2113 2114 static const int action_opcodes[] = { 2115 O_CHECK_STATE, O_ACCEPT, O_COUNT, O_DENY, O_REJECT, 2116 O_UNREACH6, O_SKIPTO, O_PIPE, O_QUEUE, O_DIVERT, O_TEE, 2117 O_NETGRAPH, O_NGTEE, O_FORWARD_IP, O_FORWARD_IP6, O_NAT, 2118 O_SETFIB, O_SETDSCP, O_REASS, O_CALLRETURN, 2119 /* keep the following opcodes at the end of the list */ 2120 O_EXTERNAL_ACTION, O_EXTERNAL_INSTANCE, O_EXTERNAL_DATA 2121 }; 2122 2123 static const int modifier_opcodes[] = { 2124 O_LOG, O_ALTQ, O_TAG 2125 }; 2126 2127 static const int src_opcodes[] = { 2128 O_IP_SRC, O_IP_SRC_LOOKUP, O_IP_SRC_MASK, O_IP_SRC_ME, 2129 O_IP_SRC_SET, O_IP6_SRC, O_IP6_SRC_MASK, O_IP6_SRC_ME 2130 }; 2131 2132 static const int dst_opcodes[] = { 2133 O_IP_DST, O_IP_DST_LOOKUP, O_IP_DST_MASK, O_IP_DST_ME, 2134 O_IP_DST_SET, O_IP6_DST, O_IP6_DST_MASK, O_IP6_DST_ME 2135 }; 2136 2137 static void 2138 show_static_rule(struct cmdline_opts *co, struct format_opts *fo, 2139 struct buf_pr *bp, struct ip_fw_rule *rule, struct ip_fw_bcounter *cntr) 2140 { 2141 struct show_state state; 2142 ipfw_insn *cmd; 2143 static int twidth = 0; 2144 int i; 2145 2146 /* Print # DISABLED or skip the rule */ 2147 if ((fo->set_mask & (1 << rule->set)) == 0) { 2148 /* disabled mask */ 2149 if (!co->show_sets) 2150 return; 2151 else 2152 bprintf(bp, "# DISABLED "); 2153 } 2154 if (init_show_state(&state, rule) != 0) { 2155 warn("init_show_state() failed"); 2156 return; 2157 } 2158 bprintf(bp, "%05u ", rule->rulenum); 2159 2160 /* Print counters if enabled */ 2161 if (fo->pcwidth > 0 || fo->bcwidth > 0) { 2162 pr_u64(bp, &cntr->pcnt, fo->pcwidth); 2163 pr_u64(bp, &cntr->bcnt, fo->bcwidth); 2164 } 2165 2166 /* Print timestamp */ 2167 if (co->do_time == TIMESTAMP_NUMERIC) 2168 bprintf(bp, "%10u ", cntr->timestamp); 2169 else if (co->do_time == TIMESTAMP_STRING) { 2170 char timestr[30]; 2171 time_t t = (time_t)0; 2172 2173 if (twidth == 0) { 2174 strcpy(timestr, ctime(&t)); 2175 *strchr(timestr, '\n') = '\0'; 2176 twidth = strlen(timestr); 2177 } 2178 if (cntr->timestamp > 0) { 2179 t = _long_to_time(cntr->timestamp); 2180 2181 strcpy(timestr, ctime(&t)); 2182 *strchr(timestr, '\n') = '\0'; 2183 bprintf(bp, "%s ", timestr); 2184 } else { 2185 bprintf(bp, "%*s", twidth, " "); 2186 } 2187 } 2188 2189 /* Print set number */ 2190 if (co->show_sets) 2191 bprintf(bp, "set %d ", rule->set); 2192 2193 /* Print the optional "match probability" */ 2194 cmd = print_opcode(bp, fo, &state, O_PROB); 2195 /* Print rule action */ 2196 for (i = 0; i < nitems(action_opcodes); i++) { 2197 cmd = print_action(bp, fo, &state, action_opcodes[i]); 2198 if (cmd == NULL) 2199 continue; 2200 /* Handle special cases */ 2201 switch (cmd->opcode) { 2202 case O_CHECK_STATE: 2203 goto end; 2204 case O_EXTERNAL_ACTION: 2205 case O_EXTERNAL_INSTANCE: 2206 /* External action can have several instructions */ 2207 continue; 2208 } 2209 break; 2210 } 2211 /* Print rule modifiers */ 2212 for (i = 0; i < nitems(modifier_opcodes); i++) 2213 print_action(bp, fo, &state, modifier_opcodes[i]); 2214 /* 2215 * Print rule body 2216 */ 2217 if (co->comment_only != 0) 2218 goto end; 2219 2220 if (rule->flags & IPFW_RULE_JUSTOPTS) { 2221 state.flags |= HAVE_PROTO | HAVE_SRCIP | HAVE_DSTIP; 2222 goto justopts; 2223 } 2224 2225 print_proto(bp, fo, &state); 2226 if (co->do_compact != 0 && (rule->flags & IPFW_RULE_NOOPT)) 2227 goto justopts; 2228 2229 /* Print source */ 2230 bprintf(bp, " from"); 2231 print_address(bp, fo, &state, src_opcodes, nitems(src_opcodes), 2232 O_IP_SRCPORT, HAVE_SRCIP); 2233 2234 /* Print destination */ 2235 bprintf(bp, " to"); 2236 print_address(bp, fo, &state, dst_opcodes, nitems(dst_opcodes), 2237 O_IP_DSTPORT, HAVE_DSTIP); 2238 2239 justopts: 2240 /* Print the rest of options */ 2241 while (print_opcode(bp, fo, &state, -1)) 2242 ; 2243 end: 2244 /* Print comment at the end */ 2245 cmd = print_opcode(bp, fo, &state, O_NOP); 2246 if (co->comment_only != 0 && cmd == NULL) 2247 bprintf(bp, " // ..."); 2248 bprintf(bp, "\n"); 2249 free_show_state(&state); 2250 } 2251 2252 static void 2253 show_dyn_state(struct cmdline_opts *co, struct format_opts *fo, 2254 struct buf_pr *bp, ipfw_dyn_rule *d) 2255 { 2256 struct protoent *pe; 2257 struct in_addr a; 2258 uint16_t rulenum; 2259 char buf[INET6_ADDRSTRLEN]; 2260 2261 if (d->expire == 0 && d->dyn_type != O_LIMIT_PARENT) 2262 return; 2263 2264 bcopy(&d->rule, &rulenum, sizeof(rulenum)); 2265 bprintf(bp, "%05d", rulenum); 2266 if (fo->pcwidth > 0 || fo->bcwidth > 0) { 2267 bprintf(bp, " "); 2268 pr_u64(bp, &d->pcnt, fo->pcwidth); 2269 pr_u64(bp, &d->bcnt, fo->bcwidth); 2270 bprintf(bp, "(%ds)", d->expire); 2271 } 2272 switch (d->dyn_type) { 2273 case O_LIMIT_PARENT: 2274 bprintf(bp, " PARENT %d", d->count); 2275 break; 2276 case O_LIMIT: 2277 bprintf(bp, " LIMIT"); 2278 break; 2279 case O_KEEP_STATE: /* bidir, no mask */ 2280 bprintf(bp, " STATE"); 2281 break; 2282 } 2283 2284 if ((pe = getprotobynumber(d->id.proto)) != NULL) 2285 bprintf(bp, " %s", pe->p_name); 2286 else 2287 bprintf(bp, " proto %u", d->id.proto); 2288 2289 if (d->id.addr_type == 4) { 2290 a.s_addr = htonl(d->id.src_ip); 2291 bprintf(bp, " %s %d", inet_ntoa(a), d->id.src_port); 2292 2293 a.s_addr = htonl(d->id.dst_ip); 2294 bprintf(bp, " <-> %s %d", inet_ntoa(a), d->id.dst_port); 2295 } else if (d->id.addr_type == 6) { 2296 bprintf(bp, " %s %d", inet_ntop(AF_INET6, &d->id.src_ip6, buf, 2297 sizeof(buf)), d->id.src_port); 2298 bprintf(bp, " <-> %s %d", inet_ntop(AF_INET6, &d->id.dst_ip6, 2299 buf, sizeof(buf)), d->id.dst_port); 2300 } else 2301 bprintf(bp, " UNKNOWN <-> UNKNOWN"); 2302 if (d->kidx != 0) 2303 bprintf(bp, " :%s", object_search_ctlv(fo->tstate, 2304 d->kidx, IPFW_TLV_STATE_NAME)); 2305 2306 #define BOTH_SYN (TH_SYN | (TH_SYN << 8)) 2307 #define BOTH_FIN (TH_FIN | (TH_FIN << 8)) 2308 if (co->verbose) { 2309 bprintf(bp, " state 0x%08x%s", d->state, 2310 d->state ? " ": ","); 2311 if (d->state & IPFW_DYN_ORPHANED) 2312 bprintf(bp, "ORPHANED,"); 2313 if ((d->state & BOTH_SYN) == BOTH_SYN) 2314 bprintf(bp, "BOTH_SYN,"); 2315 else { 2316 if (d->state & TH_SYN) 2317 bprintf(bp, "F_SYN,"); 2318 if (d->state & (TH_SYN << 8)) 2319 bprintf(bp, "R_SYN,"); 2320 } 2321 if ((d->state & BOTH_FIN) == BOTH_FIN) 2322 bprintf(bp, "BOTH_FIN,"); 2323 else { 2324 if (d->state & TH_FIN) 2325 bprintf(bp, "F_FIN,"); 2326 if (d->state & (TH_FIN << 8)) 2327 bprintf(bp, "R_FIN,"); 2328 } 2329 bprintf(bp, " f_ack 0x%x, r_ack 0x%x", d->ack_fwd, 2330 d->ack_rev); 2331 } 2332 } 2333 2334 static int 2335 do_range_cmd(int cmd, ipfw_range_tlv *rt) 2336 { 2337 ipfw_range_header rh; 2338 size_t sz; 2339 2340 memset(&rh, 0, sizeof(rh)); 2341 memcpy(&rh.range, rt, sizeof(*rt)); 2342 rh.range.head.length = sizeof(*rt); 2343 rh.range.head.type = IPFW_TLV_RANGE; 2344 sz = sizeof(rh); 2345 2346 if (do_get3(cmd, &rh.opheader, &sz) != 0) 2347 return (-1); 2348 /* Save number of matched objects */ 2349 rt->new_set = rh.range.new_set; 2350 return (0); 2351 } 2352 2353 /* 2354 * This one handles all set-related commands 2355 * ipfw set { show | enable | disable } 2356 * ipfw set swap X Y 2357 * ipfw set move X to Y 2358 * ipfw set move rule X to Y 2359 */ 2360 void 2361 ipfw_sets_handler(char *av[]) 2362 { 2363 ipfw_range_tlv rt; 2364 char *msg; 2365 size_t size; 2366 uint32_t masks[2]; 2367 int i; 2368 uint16_t rulenum; 2369 uint8_t cmd; 2370 2371 av++; 2372 memset(&rt, 0, sizeof(rt)); 2373 2374 if (av[0] == NULL) 2375 errx(EX_USAGE, "set needs command"); 2376 if (_substrcmp(*av, "show") == 0) { 2377 struct format_opts fo; 2378 ipfw_cfg_lheader *cfg; 2379 2380 memset(&fo, 0, sizeof(fo)); 2381 if (ipfw_get_config(&co, &fo, &cfg, &size) != 0) 2382 err(EX_OSERR, "requesting config failed"); 2383 2384 for (i = 0, msg = "disable"; i < RESVD_SET; i++) 2385 if ((cfg->set_mask & (1<<i)) == 0) { 2386 printf("%s %d", msg, i); 2387 msg = ""; 2388 } 2389 msg = (cfg->set_mask != (uint32_t)-1) ? " enable" : "enable"; 2390 for (i = 0; i < RESVD_SET; i++) 2391 if ((cfg->set_mask & (1<<i)) != 0) { 2392 printf("%s %d", msg, i); 2393 msg = ""; 2394 } 2395 printf("\n"); 2396 free(cfg); 2397 } else if (_substrcmp(*av, "swap") == 0) { 2398 av++; 2399 if ( av[0] == NULL || av[1] == NULL ) 2400 errx(EX_USAGE, "set swap needs 2 set numbers\n"); 2401 rt.set = atoi(av[0]); 2402 rt.new_set = atoi(av[1]); 2403 if (!isdigit(*(av[0])) || rt.set > RESVD_SET) 2404 errx(EX_DATAERR, "invalid set number %s\n", av[0]); 2405 if (!isdigit(*(av[1])) || rt.new_set > RESVD_SET) 2406 errx(EX_DATAERR, "invalid set number %s\n", av[1]); 2407 i = do_range_cmd(IP_FW_SET_SWAP, &rt); 2408 } else if (_substrcmp(*av, "move") == 0) { 2409 av++; 2410 if (av[0] && _substrcmp(*av, "rule") == 0) { 2411 rt.flags = IPFW_RCFLAG_RANGE; /* move rules to new set */ 2412 cmd = IP_FW_XMOVE; 2413 av++; 2414 } else 2415 cmd = IP_FW_SET_MOVE; /* Move set to new one */ 2416 if (av[0] == NULL || av[1] == NULL || av[2] == NULL || 2417 av[3] != NULL || _substrcmp(av[1], "to") != 0) 2418 errx(EX_USAGE, "syntax: set move [rule] X to Y\n"); 2419 rulenum = atoi(av[0]); 2420 rt.new_set = atoi(av[2]); 2421 if (cmd == IP_FW_XMOVE) { 2422 rt.start_rule = rulenum; 2423 rt.end_rule = rulenum; 2424 } else 2425 rt.set = rulenum; 2426 rt.new_set = atoi(av[2]); 2427 if (!isdigit(*(av[0])) || (cmd == 3 && rt.set > RESVD_SET) || 2428 (cmd == 2 && rt.start_rule == IPFW_DEFAULT_RULE) ) 2429 errx(EX_DATAERR, "invalid source number %s\n", av[0]); 2430 if (!isdigit(*(av[2])) || rt.new_set > RESVD_SET) 2431 errx(EX_DATAERR, "invalid dest. set %s\n", av[1]); 2432 i = do_range_cmd(cmd, &rt); 2433 if (i < 0) 2434 err(EX_OSERR, "failed to move %s", 2435 cmd == IP_FW_SET_MOVE ? "set": "rule"); 2436 } else if (_substrcmp(*av, "disable") == 0 || 2437 _substrcmp(*av, "enable") == 0 ) { 2438 int which = _substrcmp(*av, "enable") == 0 ? 1 : 0; 2439 2440 av++; 2441 masks[0] = masks[1] = 0; 2442 2443 while (av[0]) { 2444 if (isdigit(**av)) { 2445 i = atoi(*av); 2446 if (i < 0 || i > RESVD_SET) 2447 errx(EX_DATAERR, 2448 "invalid set number %d\n", i); 2449 masks[which] |= (1<<i); 2450 } else if (_substrcmp(*av, "disable") == 0) 2451 which = 0; 2452 else if (_substrcmp(*av, "enable") == 0) 2453 which = 1; 2454 else 2455 errx(EX_DATAERR, 2456 "invalid set command %s\n", *av); 2457 av++; 2458 } 2459 if ( (masks[0] & masks[1]) != 0 ) 2460 errx(EX_DATAERR, 2461 "cannot enable and disable the same set\n"); 2462 2463 rt.set = masks[0]; 2464 rt.new_set = masks[1]; 2465 i = do_range_cmd(IP_FW_SET_ENABLE, &rt); 2466 if (i) 2467 warn("set enable/disable: setsockopt(IP_FW_SET_ENABLE)"); 2468 } else 2469 errx(EX_USAGE, "invalid set command %s\n", *av); 2470 } 2471 2472 void 2473 ipfw_sysctl_handler(char *av[], int which) 2474 { 2475 av++; 2476 2477 if (av[0] == NULL) { 2478 warnx("missing keyword to enable/disable\n"); 2479 } else if (_substrcmp(*av, "firewall") == 0) { 2480 sysctlbyname("net.inet.ip.fw.enable", NULL, 0, 2481 &which, sizeof(which)); 2482 sysctlbyname("net.inet6.ip6.fw.enable", NULL, 0, 2483 &which, sizeof(which)); 2484 } else if (_substrcmp(*av, "one_pass") == 0) { 2485 sysctlbyname("net.inet.ip.fw.one_pass", NULL, 0, 2486 &which, sizeof(which)); 2487 } else if (_substrcmp(*av, "debug") == 0) { 2488 sysctlbyname("net.inet.ip.fw.debug", NULL, 0, 2489 &which, sizeof(which)); 2490 } else if (_substrcmp(*av, "verbose") == 0) { 2491 sysctlbyname("net.inet.ip.fw.verbose", NULL, 0, 2492 &which, sizeof(which)); 2493 } else if (_substrcmp(*av, "dyn_keepalive") == 0) { 2494 sysctlbyname("net.inet.ip.fw.dyn_keepalive", NULL, 0, 2495 &which, sizeof(which)); 2496 #ifndef NO_ALTQ 2497 } else if (_substrcmp(*av, "altq") == 0) { 2498 altq_set_enabled(which); 2499 #endif 2500 } else { 2501 warnx("unrecognize enable/disable keyword: %s\n", *av); 2502 } 2503 } 2504 2505 typedef void state_cb(struct cmdline_opts *co, struct format_opts *fo, 2506 void *arg, void *state); 2507 2508 static void 2509 prepare_format_dyn(struct cmdline_opts *co, struct format_opts *fo, 2510 void *arg, void *_state) 2511 { 2512 ipfw_dyn_rule *d; 2513 int width; 2514 uint8_t set; 2515 2516 d = (ipfw_dyn_rule *)_state; 2517 /* Count _ALL_ states */ 2518 fo->dcnt++; 2519 2520 if (fo->show_counters == 0) 2521 return; 2522 2523 if (co->use_set) { 2524 /* skip states from another set */ 2525 bcopy((char *)&d->rule + sizeof(uint16_t), &set, 2526 sizeof(uint8_t)); 2527 if (set != co->use_set - 1) 2528 return; 2529 } 2530 2531 width = pr_u64(NULL, &d->pcnt, 0); 2532 if (width > fo->pcwidth) 2533 fo->pcwidth = width; 2534 2535 width = pr_u64(NULL, &d->bcnt, 0); 2536 if (width > fo->bcwidth) 2537 fo->bcwidth = width; 2538 } 2539 2540 static int 2541 foreach_state(struct cmdline_opts *co, struct format_opts *fo, 2542 caddr_t base, size_t sz, state_cb dyn_bc, void *dyn_arg) 2543 { 2544 int ttype; 2545 state_cb *fptr; 2546 void *farg; 2547 ipfw_obj_tlv *tlv; 2548 ipfw_obj_ctlv *ctlv; 2549 2550 fptr = NULL; 2551 ttype = 0; 2552 2553 while (sz > 0) { 2554 ctlv = (ipfw_obj_ctlv *)base; 2555 switch (ctlv->head.type) { 2556 case IPFW_TLV_DYNSTATE_LIST: 2557 base += sizeof(*ctlv); 2558 sz -= sizeof(*ctlv); 2559 ttype = IPFW_TLV_DYN_ENT; 2560 fptr = dyn_bc; 2561 farg = dyn_arg; 2562 break; 2563 default: 2564 return (sz); 2565 } 2566 2567 while (sz > 0) { 2568 tlv = (ipfw_obj_tlv *)base; 2569 if (tlv->type != ttype) 2570 break; 2571 2572 fptr(co, fo, farg, tlv + 1); 2573 sz -= tlv->length; 2574 base += tlv->length; 2575 } 2576 } 2577 2578 return (sz); 2579 } 2580 2581 static void 2582 prepare_format_opts(struct cmdline_opts *co, struct format_opts *fo, 2583 ipfw_obj_tlv *rtlv, int rcnt, caddr_t dynbase, size_t dynsz) 2584 { 2585 int bcwidth, pcwidth, width; 2586 int n; 2587 struct ip_fw_bcounter *cntr; 2588 struct ip_fw_rule *r; 2589 2590 bcwidth = 0; 2591 pcwidth = 0; 2592 if (fo->show_counters != 0) { 2593 for (n = 0; n < rcnt; n++, 2594 rtlv = (ipfw_obj_tlv *)((caddr_t)rtlv + rtlv->length)) { 2595 cntr = (struct ip_fw_bcounter *)(rtlv + 1); 2596 r = (struct ip_fw_rule *)((caddr_t)cntr + cntr->size); 2597 /* skip rules from another set */ 2598 if (co->use_set && r->set != co->use_set - 1) 2599 continue; 2600 2601 /* packet counter */ 2602 width = pr_u64(NULL, &cntr->pcnt, 0); 2603 if (width > pcwidth) 2604 pcwidth = width; 2605 2606 /* byte counter */ 2607 width = pr_u64(NULL, &cntr->bcnt, 0); 2608 if (width > bcwidth) 2609 bcwidth = width; 2610 } 2611 } 2612 fo->bcwidth = bcwidth; 2613 fo->pcwidth = pcwidth; 2614 2615 fo->dcnt = 0; 2616 if (co->do_dynamic && dynsz > 0) 2617 foreach_state(co, fo, dynbase, dynsz, prepare_format_dyn, NULL); 2618 } 2619 2620 static int 2621 list_static_range(struct cmdline_opts *co, struct format_opts *fo, 2622 struct buf_pr *bp, ipfw_obj_tlv *rtlv, int rcnt) 2623 { 2624 int n, seen; 2625 struct ip_fw_rule *r; 2626 struct ip_fw_bcounter *cntr; 2627 int c = 0; 2628 2629 for (n = seen = 0; n < rcnt; n++, 2630 rtlv = (ipfw_obj_tlv *)((caddr_t)rtlv + rtlv->length)) { 2631 2632 if ((fo->show_counters | fo->show_time) != 0) { 2633 cntr = (struct ip_fw_bcounter *)(rtlv + 1); 2634 r = (struct ip_fw_rule *)((caddr_t)cntr + cntr->size); 2635 } else { 2636 cntr = NULL; 2637 r = (struct ip_fw_rule *)(rtlv + 1); 2638 } 2639 if (r->rulenum > fo->last) 2640 break; 2641 if (co->use_set && r->set != co->use_set - 1) 2642 continue; 2643 if (r->rulenum >= fo->first && r->rulenum <= fo->last) { 2644 show_static_rule(co, fo, bp, r, cntr); 2645 printf("%s", bp->buf); 2646 c += rtlv->length; 2647 bp_flush(bp); 2648 seen++; 2649 } 2650 } 2651 2652 return (seen); 2653 } 2654 2655 static void 2656 list_dyn_state(struct cmdline_opts *co, struct format_opts *fo, 2657 void *_arg, void *_state) 2658 { 2659 uint16_t rulenum; 2660 uint8_t set; 2661 ipfw_dyn_rule *d; 2662 struct buf_pr *bp; 2663 2664 d = (ipfw_dyn_rule *)_state; 2665 bp = (struct buf_pr *)_arg; 2666 2667 bcopy(&d->rule, &rulenum, sizeof(rulenum)); 2668 if (rulenum > fo->last) 2669 return; 2670 if (co->use_set) { 2671 bcopy((char *)&d->rule + sizeof(uint16_t), 2672 &set, sizeof(uint8_t)); 2673 if (set != co->use_set - 1) 2674 return; 2675 } 2676 if (rulenum >= fo->first) { 2677 show_dyn_state(co, fo, bp, d); 2678 printf("%s\n", bp->buf); 2679 bp_flush(bp); 2680 } 2681 } 2682 2683 static int 2684 list_dyn_range(struct cmdline_opts *co, struct format_opts *fo, 2685 struct buf_pr *bp, caddr_t base, size_t sz) 2686 { 2687 2688 sz = foreach_state(co, fo, base, sz, list_dyn_state, bp); 2689 return (sz); 2690 } 2691 2692 void 2693 ipfw_list(int ac, char *av[], int show_counters) 2694 { 2695 ipfw_cfg_lheader *cfg; 2696 struct format_opts sfo; 2697 size_t sz; 2698 int error; 2699 int lac; 2700 char **lav; 2701 uint32_t rnum; 2702 char *endptr; 2703 2704 if (co.test_only) { 2705 fprintf(stderr, "Testing only, list disabled\n"); 2706 return; 2707 } 2708 if (co.do_pipe) { 2709 dummynet_list(ac, av, show_counters); 2710 return; 2711 } 2712 2713 ac--; 2714 av++; 2715 memset(&sfo, 0, sizeof(sfo)); 2716 2717 /* Determine rule range to request */ 2718 if (ac > 0) { 2719 for (lac = ac, lav = av; lac != 0; lac--) { 2720 rnum = strtoul(*lav++, &endptr, 10); 2721 if (sfo.first == 0 || rnum < sfo.first) 2722 sfo.first = rnum; 2723 2724 if (*endptr == '-') 2725 rnum = strtoul(endptr + 1, &endptr, 10); 2726 if (sfo.last == 0 || rnum > sfo.last) 2727 sfo.last = rnum; 2728 } 2729 } 2730 2731 /* get configuraion from kernel */ 2732 cfg = NULL; 2733 sfo.show_counters = show_counters; 2734 sfo.show_time = co.do_time; 2735 if (co.do_dynamic != 2) 2736 sfo.flags |= IPFW_CFG_GET_STATIC; 2737 if (co.do_dynamic != 0) 2738 sfo.flags |= IPFW_CFG_GET_STATES; 2739 if ((sfo.show_counters | sfo.show_time) != 0) 2740 sfo.flags |= IPFW_CFG_GET_COUNTERS; 2741 if (ipfw_get_config(&co, &sfo, &cfg, &sz) != 0) 2742 err(EX_OSERR, "retrieving config failed"); 2743 2744 error = ipfw_show_config(&co, &sfo, cfg, sz, ac, av); 2745 2746 free(cfg); 2747 2748 if (error != EX_OK) 2749 exit(error); 2750 } 2751 2752 static int 2753 ipfw_show_config(struct cmdline_opts *co, struct format_opts *fo, 2754 ipfw_cfg_lheader *cfg, size_t sz, int ac, char *av[]) 2755 { 2756 caddr_t dynbase; 2757 size_t dynsz; 2758 int rcnt; 2759 int exitval = EX_OK; 2760 int lac; 2761 char **lav; 2762 char *endptr; 2763 size_t readsz; 2764 struct buf_pr bp; 2765 ipfw_obj_ctlv *ctlv, *tstate; 2766 ipfw_obj_tlv *rbase; 2767 2768 /* 2769 * Handle tablenames TLV first, if any 2770 */ 2771 tstate = NULL; 2772 rbase = NULL; 2773 dynbase = NULL; 2774 dynsz = 0; 2775 readsz = sizeof(*cfg); 2776 rcnt = 0; 2777 2778 fo->set_mask = cfg->set_mask; 2779 2780 ctlv = (ipfw_obj_ctlv *)(cfg + 1); 2781 if (ctlv->head.type == IPFW_TLV_TBLNAME_LIST) { 2782 object_sort_ctlv(ctlv); 2783 fo->tstate = ctlv; 2784 readsz += ctlv->head.length; 2785 ctlv = (ipfw_obj_ctlv *)((caddr_t)ctlv + ctlv->head.length); 2786 } 2787 2788 if (cfg->flags & IPFW_CFG_GET_STATIC) { 2789 /* We've requested static rules */ 2790 if (ctlv->head.type == IPFW_TLV_RULE_LIST) { 2791 rbase = (ipfw_obj_tlv *)(ctlv + 1); 2792 rcnt = ctlv->count; 2793 readsz += ctlv->head.length; 2794 ctlv = (ipfw_obj_ctlv *)((caddr_t)ctlv + 2795 ctlv->head.length); 2796 } 2797 } 2798 2799 if ((cfg->flags & IPFW_CFG_GET_STATES) && (readsz != sz)) { 2800 /* We may have some dynamic states */ 2801 dynsz = sz - readsz; 2802 /* Skip empty header */ 2803 if (dynsz != sizeof(ipfw_obj_ctlv)) 2804 dynbase = (caddr_t)ctlv; 2805 else 2806 dynsz = 0; 2807 } 2808 2809 prepare_format_opts(co, fo, rbase, rcnt, dynbase, dynsz); 2810 bp_alloc(&bp, 4096); 2811 2812 /* if no rule numbers were specified, list all rules */ 2813 if (ac == 0) { 2814 fo->first = 0; 2815 fo->last = IPFW_DEFAULT_RULE; 2816 if (cfg->flags & IPFW_CFG_GET_STATIC) 2817 list_static_range(co, fo, &bp, rbase, rcnt); 2818 2819 if (co->do_dynamic && dynsz > 0) { 2820 printf("## Dynamic rules (%d %zu):\n", fo->dcnt, 2821 dynsz); 2822 list_dyn_range(co, fo, &bp, dynbase, dynsz); 2823 } 2824 2825 bp_free(&bp); 2826 return (EX_OK); 2827 } 2828 2829 /* display specific rules requested on command line */ 2830 for (lac = ac, lav = av; lac != 0; lac--) { 2831 /* convert command line rule # */ 2832 fo->last = fo->first = strtoul(*lav++, &endptr, 10); 2833 if (*endptr == '-') 2834 fo->last = strtoul(endptr + 1, &endptr, 10); 2835 if (*endptr) { 2836 exitval = EX_USAGE; 2837 warnx("invalid rule number: %s", *(lav - 1)); 2838 continue; 2839 } 2840 2841 if ((cfg->flags & IPFW_CFG_GET_STATIC) == 0) 2842 continue; 2843 2844 if (list_static_range(co, fo, &bp, rbase, rcnt) == 0) { 2845 /* give precedence to other error(s) */ 2846 if (exitval == EX_OK) 2847 exitval = EX_UNAVAILABLE; 2848 if (fo->first == fo->last) 2849 warnx("rule %u does not exist", fo->first); 2850 else 2851 warnx("no rules in range %u-%u", 2852 fo->first, fo->last); 2853 } 2854 } 2855 2856 if (co->do_dynamic && dynsz > 0) { 2857 printf("## Dynamic rules:\n"); 2858 for (lac = ac, lav = av; lac != 0; lac--) { 2859 fo->last = fo->first = strtoul(*lav++, &endptr, 10); 2860 if (*endptr == '-') 2861 fo->last = strtoul(endptr+1, &endptr, 10); 2862 if (*endptr) 2863 /* already warned */ 2864 continue; 2865 list_dyn_range(co, fo, &bp, dynbase, dynsz); 2866 } 2867 } 2868 2869 bp_free(&bp); 2870 return (exitval); 2871 } 2872 2873 2874 /* 2875 * Retrieves current ipfw configuration of given type 2876 * and stores its pointer to @pcfg. 2877 * 2878 * Caller is responsible for freeing @pcfg. 2879 * 2880 * Returns 0 on success. 2881 */ 2882 2883 static int 2884 ipfw_get_config(struct cmdline_opts *co, struct format_opts *fo, 2885 ipfw_cfg_lheader **pcfg, size_t *psize) 2886 { 2887 ipfw_cfg_lheader *cfg; 2888 size_t sz; 2889 int i; 2890 2891 2892 if (co->test_only != 0) { 2893 fprintf(stderr, "Testing only, list disabled\n"); 2894 return (0); 2895 } 2896 2897 /* Start with some data size */ 2898 sz = 4096; 2899 cfg = NULL; 2900 2901 for (i = 0; i < 16; i++) { 2902 if (cfg != NULL) 2903 free(cfg); 2904 if ((cfg = calloc(1, sz)) == NULL) 2905 return (ENOMEM); 2906 2907 cfg->flags = fo->flags; 2908 cfg->start_rule = fo->first; 2909 cfg->end_rule = fo->last; 2910 2911 if (do_get3(IP_FW_XGET, &cfg->opheader, &sz) != 0) { 2912 if (errno != ENOMEM) { 2913 free(cfg); 2914 return (errno); 2915 } 2916 2917 /* Buffer size is not enough. Try to increase */ 2918 sz = sz * 2; 2919 if (sz < cfg->size) 2920 sz = cfg->size; 2921 continue; 2922 } 2923 2924 *pcfg = cfg; 2925 *psize = sz; 2926 return (0); 2927 } 2928 2929 free(cfg); 2930 return (ENOMEM); 2931 } 2932 2933 static int 2934 lookup_host (char *host, struct in_addr *ipaddr) 2935 { 2936 struct hostent *he; 2937 2938 if (!inet_aton(host, ipaddr)) { 2939 if ((he = gethostbyname(host)) == NULL) 2940 return(-1); 2941 *ipaddr = *(struct in_addr *)he->h_addr_list[0]; 2942 } 2943 return(0); 2944 } 2945 2946 struct tidx { 2947 ipfw_obj_ntlv *idx; 2948 uint32_t count; 2949 uint32_t size; 2950 uint16_t counter; 2951 uint8_t set; 2952 }; 2953 2954 int 2955 ipfw_check_object_name(const char *name) 2956 { 2957 int c, i, l; 2958 2959 /* 2960 * Check that name is null-terminated and contains 2961 * valid symbols only. Valid mask is: 2962 * [a-zA-Z0-9\-_\.]{1,63} 2963 */ 2964 l = strlen(name); 2965 if (l == 0 || l >= 64) 2966 return (EINVAL); 2967 for (i = 0; i < l; i++) { 2968 c = name[i]; 2969 if (isalpha(c) || isdigit(c) || c == '_' || 2970 c == '-' || c == '.') 2971 continue; 2972 return (EINVAL); 2973 } 2974 return (0); 2975 } 2976 2977 static char *default_state_name = "default"; 2978 static int 2979 state_check_name(const char *name) 2980 { 2981 2982 if (ipfw_check_object_name(name) != 0) 2983 return (EINVAL); 2984 if (strcmp(name, "any") == 0) 2985 return (EINVAL); 2986 return (0); 2987 } 2988 2989 static int 2990 eaction_check_name(const char *name) 2991 { 2992 2993 if (ipfw_check_object_name(name) != 0) 2994 return (EINVAL); 2995 /* Restrict some 'special' names */ 2996 if (match_token(rule_actions, name) != -1 && 2997 match_token(rule_action_params, name) != -1) 2998 return (EINVAL); 2999 return (0); 3000 } 3001 3002 static uint16_t 3003 pack_object(struct tidx *tstate, char *name, int otype) 3004 { 3005 int i; 3006 ipfw_obj_ntlv *ntlv; 3007 3008 for (i = 0; i < tstate->count; i++) { 3009 if (strcmp(tstate->idx[i].name, name) != 0) 3010 continue; 3011 if (tstate->idx[i].set != tstate->set) 3012 continue; 3013 if (tstate->idx[i].head.type != otype) 3014 continue; 3015 3016 return (tstate->idx[i].idx); 3017 } 3018 3019 if (tstate->count + 1 > tstate->size) { 3020 tstate->size += 4; 3021 tstate->idx = realloc(tstate->idx, tstate->size * 3022 sizeof(ipfw_obj_ntlv)); 3023 if (tstate->idx == NULL) 3024 return (0); 3025 } 3026 3027 ntlv = &tstate->idx[i]; 3028 memset(ntlv, 0, sizeof(ipfw_obj_ntlv)); 3029 strlcpy(ntlv->name, name, sizeof(ntlv->name)); 3030 ntlv->head.type = otype; 3031 ntlv->head.length = sizeof(ipfw_obj_ntlv); 3032 ntlv->set = tstate->set; 3033 ntlv->idx = ++tstate->counter; 3034 tstate->count++; 3035 3036 return (ntlv->idx); 3037 } 3038 3039 static uint16_t 3040 pack_table(struct tidx *tstate, char *name) 3041 { 3042 3043 if (table_check_name(name) != 0) 3044 return (0); 3045 3046 return (pack_object(tstate, name, IPFW_TLV_TBL_NAME)); 3047 } 3048 3049 void 3050 fill_table(struct _ipfw_insn *cmd, char *av, uint8_t opcode, 3051 struct tidx *tstate) 3052 { 3053 uint32_t *d = ((ipfw_insn_u32 *)cmd)->d; 3054 uint16_t uidx; 3055 char *p; 3056 3057 if ((p = strchr(av + 6, ')')) == NULL) 3058 errx(EX_DATAERR, "forgotten parenthesis: '%s'", av); 3059 *p = '\0'; 3060 p = strchr(av + 6, ','); 3061 if (p) 3062 *p++ = '\0'; 3063 3064 if ((uidx = pack_table(tstate, av + 6)) == 0) 3065 errx(EX_DATAERR, "Invalid table name: %s", av + 6); 3066 3067 cmd->opcode = opcode; 3068 cmd->arg1 = uidx; 3069 if (p) { 3070 cmd->len |= F_INSN_SIZE(ipfw_insn_u32); 3071 d[0] = strtoul(p, NULL, 0); 3072 } else 3073 cmd->len |= F_INSN_SIZE(ipfw_insn); 3074 } 3075 3076 3077 /* 3078 * fills the addr and mask fields in the instruction as appropriate from av. 3079 * Update length as appropriate. 3080 * The following formats are allowed: 3081 * me returns O_IP_*_ME 3082 * 1.2.3.4 single IP address 3083 * 1.2.3.4:5.6.7.8 address:mask 3084 * 1.2.3.4/24 address/mask 3085 * 1.2.3.4/26{1,6,5,4,23} set of addresses in a subnet 3086 * We can have multiple comma-separated address/mask entries. 3087 */ 3088 static void 3089 fill_ip(ipfw_insn_ip *cmd, char *av, int cblen, struct tidx *tstate) 3090 { 3091 int len = 0; 3092 uint32_t *d = ((ipfw_insn_u32 *)cmd)->d; 3093 3094 cmd->o.len &= ~F_LEN_MASK; /* zero len */ 3095 3096 if (_substrcmp(av, "any") == 0) 3097 return; 3098 3099 if (_substrcmp(av, "me") == 0) { 3100 cmd->o.len |= F_INSN_SIZE(ipfw_insn); 3101 return; 3102 } 3103 3104 if (strncmp(av, "table(", 6) == 0) { 3105 fill_table(&cmd->o, av, O_IP_DST_LOOKUP, tstate); 3106 return; 3107 } 3108 3109 while (av) { 3110 /* 3111 * After the address we can have '/' or ':' indicating a mask, 3112 * ',' indicating another address follows, '{' indicating a 3113 * set of addresses of unspecified size. 3114 */ 3115 char *t = NULL, *p = strpbrk(av, "/:,{"); 3116 int masklen; 3117 char md, nd = '\0'; 3118 3119 CHECK_LENGTH(cblen, F_INSN_SIZE(ipfw_insn) + 2 + len); 3120 3121 if (p) { 3122 md = *p; 3123 *p++ = '\0'; 3124 if ((t = strpbrk(p, ",{")) != NULL) { 3125 nd = *t; 3126 *t = '\0'; 3127 } 3128 } else 3129 md = '\0'; 3130 3131 if (lookup_host(av, (struct in_addr *)&d[0]) != 0) 3132 errx(EX_NOHOST, "hostname ``%s'' unknown", av); 3133 switch (md) { 3134 case ':': 3135 if (!inet_aton(p, (struct in_addr *)&d[1])) 3136 errx(EX_DATAERR, "bad netmask ``%s''", p); 3137 break; 3138 case '/': 3139 masklen = atoi(p); 3140 if (masklen == 0) 3141 d[1] = htonl(0U); /* mask */ 3142 else if (masklen > 32) 3143 errx(EX_DATAERR, "bad width ``%s''", p); 3144 else 3145 d[1] = htonl(~0U << (32 - masklen)); 3146 break; 3147 case '{': /* no mask, assume /24 and put back the '{' */ 3148 d[1] = htonl(~0U << (32 - 24)); 3149 *(--p) = md; 3150 break; 3151 3152 case ',': /* single address plus continuation */ 3153 *(--p) = md; 3154 /* FALLTHROUGH */ 3155 case 0: /* initialization value */ 3156 default: 3157 d[1] = htonl(~0U); /* force /32 */ 3158 break; 3159 } 3160 d[0] &= d[1]; /* mask base address with mask */ 3161 if (t) 3162 *t = nd; 3163 /* find next separator */ 3164 if (p) 3165 p = strpbrk(p, ",{"); 3166 if (p && *p == '{') { 3167 /* 3168 * We have a set of addresses. They are stored as follows: 3169 * arg1 is the set size (powers of 2, 2..256) 3170 * addr is the base address IN HOST FORMAT 3171 * mask.. is an array of arg1 bits (rounded up to 3172 * the next multiple of 32) with bits set 3173 * for each host in the map. 3174 */ 3175 uint32_t *map = (uint32_t *)&cmd->mask; 3176 int low, high; 3177 int i = contigmask((uint8_t *)&(d[1]), 32); 3178 3179 if (len > 0) 3180 errx(EX_DATAERR, "address set cannot be in a list"); 3181 if (i < 24 || i > 31) 3182 errx(EX_DATAERR, "invalid set with mask %d\n", i); 3183 cmd->o.arg1 = 1<<(32-i); /* map length */ 3184 d[0] = ntohl(d[0]); /* base addr in host format */ 3185 cmd->o.opcode = O_IP_DST_SET; /* default */ 3186 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32) + (cmd->o.arg1+31)/32; 3187 for (i = 0; i < (cmd->o.arg1+31)/32 ; i++) 3188 map[i] = 0; /* clear map */ 3189 3190 av = p + 1; 3191 low = d[0] & 0xff; 3192 high = low + cmd->o.arg1 - 1; 3193 /* 3194 * Here, i stores the previous value when we specify a range 3195 * of addresses within a mask, e.g. 45-63. i = -1 means we 3196 * have no previous value. 3197 */ 3198 i = -1; /* previous value in a range */ 3199 while (isdigit(*av)) { 3200 char *s; 3201 int a = strtol(av, &s, 0); 3202 3203 if (s == av) { /* no parameter */ 3204 if (*av != '}') 3205 errx(EX_DATAERR, "set not closed\n"); 3206 if (i != -1) 3207 errx(EX_DATAERR, "incomplete range %d-", i); 3208 break; 3209 } 3210 if (a < low || a > high) 3211 errx(EX_DATAERR, "addr %d out of range [%d-%d]\n", 3212 a, low, high); 3213 a -= low; 3214 if (i == -1) /* no previous in range */ 3215 i = a; 3216 else { /* check that range is valid */ 3217 if (i > a) 3218 errx(EX_DATAERR, "invalid range %d-%d", 3219 i+low, a+low); 3220 if (*s == '-') 3221 errx(EX_DATAERR, "double '-' in range"); 3222 } 3223 for (; i <= a; i++) 3224 map[i/32] |= 1<<(i & 31); 3225 i = -1; 3226 if (*s == '-') 3227 i = a; 3228 else if (*s == '}') 3229 break; 3230 av = s+1; 3231 } 3232 return; 3233 } 3234 av = p; 3235 if (av) /* then *av must be a ',' */ 3236 av++; 3237 3238 /* Check this entry */ 3239 if (d[1] == 0) { /* "any", specified as x.x.x.x/0 */ 3240 /* 3241 * 'any' turns the entire list into a NOP. 3242 * 'not any' never matches, so it is removed from the 3243 * list unless it is the only item, in which case we 3244 * report an error. 3245 */ 3246 if (cmd->o.len & F_NOT) { /* "not any" never matches */ 3247 if (av == NULL && len == 0) /* only this entry */ 3248 errx(EX_DATAERR, "not any never matches"); 3249 } 3250 /* else do nothing and skip this entry */ 3251 return; 3252 } 3253 /* A single IP can be stored in an optimized format */ 3254 if (d[1] == (uint32_t)~0 && av == NULL && len == 0) { 3255 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32); 3256 return; 3257 } 3258 len += 2; /* two words... */ 3259 d += 2; 3260 } /* end while */ 3261 if (len + 1 > F_LEN_MASK) 3262 errx(EX_DATAERR, "address list too long"); 3263 cmd->o.len |= len+1; 3264 } 3265 3266 3267 /* n2mask sets n bits of the mask */ 3268 void 3269 n2mask(struct in6_addr *mask, int n) 3270 { 3271 static int minimask[9] = 3272 { 0x00, 0x80, 0xc0, 0xe0, 0xf0, 0xf8, 0xfc, 0xfe, 0xff }; 3273 u_char *p; 3274 3275 memset(mask, 0, sizeof(struct in6_addr)); 3276 p = (u_char *) mask; 3277 for (; n > 0; p++, n -= 8) { 3278 if (n >= 8) 3279 *p = 0xff; 3280 else 3281 *p = minimask[n]; 3282 } 3283 return; 3284 } 3285 3286 static void 3287 fill_flags_cmd(ipfw_insn *cmd, enum ipfw_opcodes opcode, 3288 struct _s_x *flags, char *p) 3289 { 3290 char *e; 3291 uint32_t set = 0, clear = 0; 3292 3293 if (fill_flags(flags, p, &e, &set, &clear) != 0) 3294 errx(EX_DATAERR, "invalid flag %s", e); 3295 3296 cmd->opcode = opcode; 3297 cmd->len = (cmd->len & (F_NOT | F_OR)) | 1; 3298 cmd->arg1 = (set & 0xff) | ( (clear & 0xff) << 8); 3299 } 3300 3301 3302 void 3303 ipfw_delete(char *av[]) 3304 { 3305 ipfw_range_tlv rt; 3306 char *sep; 3307 int i, j; 3308 int exitval = EX_OK; 3309 int do_set = 0; 3310 3311 av++; 3312 NEED1("missing rule specification"); 3313 if ( *av && _substrcmp(*av, "set") == 0) { 3314 /* Do not allow using the following syntax: 3315 * ipfw set N delete set M 3316 */ 3317 if (co.use_set) 3318 errx(EX_DATAERR, "invalid syntax"); 3319 do_set = 1; /* delete set */ 3320 av++; 3321 } 3322 3323 /* Rule number */ 3324 while (*av && isdigit(**av)) { 3325 i = strtol(*av, &sep, 10); 3326 j = i; 3327 if (*sep== '-') 3328 j = strtol(sep + 1, NULL, 10); 3329 av++; 3330 if (co.do_nat) { 3331 exitval = do_cmd(IP_FW_NAT_DEL, &i, sizeof i); 3332 if (exitval) { 3333 exitval = EX_UNAVAILABLE; 3334 if (co.do_quiet) 3335 continue; 3336 warn("nat %u not available", i); 3337 } 3338 } else if (co.do_pipe) { 3339 exitval = ipfw_delete_pipe(co.do_pipe, i); 3340 } else { 3341 memset(&rt, 0, sizeof(rt)); 3342 if (do_set != 0) { 3343 rt.set = i & 31; 3344 rt.flags = IPFW_RCFLAG_SET; 3345 } else { 3346 rt.start_rule = i & 0xffff; 3347 rt.end_rule = j & 0xffff; 3348 if (rt.start_rule == 0 && rt.end_rule == 0) 3349 rt.flags |= IPFW_RCFLAG_ALL; 3350 else 3351 rt.flags |= IPFW_RCFLAG_RANGE; 3352 if (co.use_set != 0) { 3353 rt.set = co.use_set - 1; 3354 rt.flags |= IPFW_RCFLAG_SET; 3355 } 3356 } 3357 if (co.do_dynamic == 2) 3358 rt.flags |= IPFW_RCFLAG_DYNAMIC; 3359 i = do_range_cmd(IP_FW_XDEL, &rt); 3360 if (i != 0) { 3361 exitval = EX_UNAVAILABLE; 3362 if (co.do_quiet) 3363 continue; 3364 warn("rule %u: setsockopt(IP_FW_XDEL)", 3365 rt.start_rule); 3366 } else if (rt.new_set == 0 && do_set == 0 && 3367 co.do_dynamic != 2) { 3368 exitval = EX_UNAVAILABLE; 3369 if (co.do_quiet) 3370 continue; 3371 if (rt.start_rule != rt.end_rule) 3372 warnx("no rules rules in %u-%u range", 3373 rt.start_rule, rt.end_rule); 3374 else 3375 warnx("rule %u not found", 3376 rt.start_rule); 3377 } 3378 } 3379 } 3380 if (exitval != EX_OK && co.do_force == 0) 3381 exit(exitval); 3382 } 3383 3384 3385 /* 3386 * fill the interface structure. We do not check the name as we can 3387 * create interfaces dynamically, so checking them at insert time 3388 * makes relatively little sense. 3389 * Interface names containing '*', '?', or '[' are assumed to be shell 3390 * patterns which match interfaces. 3391 */ 3392 static void 3393 fill_iface(ipfw_insn_if *cmd, char *arg, int cblen, struct tidx *tstate) 3394 { 3395 char *p; 3396 uint16_t uidx; 3397 3398 cmd->name[0] = '\0'; 3399 cmd->o.len |= F_INSN_SIZE(ipfw_insn_if); 3400 3401 CHECK_CMDLEN; 3402 3403 /* Parse the interface or address */ 3404 if (strcmp(arg, "any") == 0) 3405 cmd->o.len = 0; /* effectively ignore this command */ 3406 else if (strncmp(arg, "table(", 6) == 0) { 3407 if ((p = strchr(arg + 6, ')')) == NULL) 3408 errx(EX_DATAERR, "forgotten parenthesis: '%s'", arg); 3409 *p = '\0'; 3410 p = strchr(arg + 6, ','); 3411 if (p) 3412 *p++ = '\0'; 3413 if ((uidx = pack_table(tstate, arg + 6)) == 0) 3414 errx(EX_DATAERR, "Invalid table name: %s", arg + 6); 3415 3416 cmd->name[0] = '\1'; /* Special value indicating table */ 3417 cmd->p.kidx = uidx; 3418 } else if (!isdigit(*arg)) { 3419 strlcpy(cmd->name, arg, sizeof(cmd->name)); 3420 cmd->p.glob = strpbrk(arg, "*?[") != NULL ? 1 : 0; 3421 } else if (!inet_aton(arg, &cmd->p.ip)) 3422 errx(EX_DATAERR, "bad ip address ``%s''", arg); 3423 } 3424 3425 static void 3426 get_mac_addr_mask(const char *p, uint8_t *addr, uint8_t *mask) 3427 { 3428 int i; 3429 size_t l; 3430 char *ap, *ptr, *optr; 3431 struct ether_addr *mac; 3432 const char *macset = "0123456789abcdefABCDEF:"; 3433 3434 if (strcmp(p, "any") == 0) { 3435 for (i = 0; i < ETHER_ADDR_LEN; i++) 3436 addr[i] = mask[i] = 0; 3437 return; 3438 } 3439 3440 optr = ptr = strdup(p); 3441 if ((ap = strsep(&ptr, "&/")) != NULL && *ap != 0) { 3442 l = strlen(ap); 3443 if (strspn(ap, macset) != l || (mac = ether_aton(ap)) == NULL) 3444 errx(EX_DATAERR, "Incorrect MAC address"); 3445 bcopy(mac, addr, ETHER_ADDR_LEN); 3446 } else 3447 errx(EX_DATAERR, "Incorrect MAC address"); 3448 3449 if (ptr != NULL) { /* we have mask? */ 3450 if (p[ptr - optr - 1] == '/') { /* mask len */ 3451 long ml = strtol(ptr, &ap, 10); 3452 if (*ap != 0 || ml > ETHER_ADDR_LEN * 8 || ml < 0) 3453 errx(EX_DATAERR, "Incorrect mask length"); 3454 for (i = 0; ml > 0 && i < ETHER_ADDR_LEN; ml -= 8, i++) 3455 mask[i] = (ml >= 8) ? 0xff: (~0) << (8 - ml); 3456 } else { /* mask */ 3457 l = strlen(ptr); 3458 if (strspn(ptr, macset) != l || 3459 (mac = ether_aton(ptr)) == NULL) 3460 errx(EX_DATAERR, "Incorrect mask"); 3461 bcopy(mac, mask, ETHER_ADDR_LEN); 3462 } 3463 } else { /* default mask: ff:ff:ff:ff:ff:ff */ 3464 for (i = 0; i < ETHER_ADDR_LEN; i++) 3465 mask[i] = 0xff; 3466 } 3467 for (i = 0; i < ETHER_ADDR_LEN; i++) 3468 addr[i] &= mask[i]; 3469 3470 free(optr); 3471 } 3472 3473 /* 3474 * helper function, updates the pointer to cmd with the length 3475 * of the current command, and also cleans up the first word of 3476 * the new command in case it has been clobbered before. 3477 */ 3478 static ipfw_insn * 3479 next_cmd(ipfw_insn *cmd, int *len) 3480 { 3481 *len -= F_LEN(cmd); 3482 CHECK_LENGTH(*len, 0); 3483 cmd += F_LEN(cmd); 3484 bzero(cmd, sizeof(*cmd)); 3485 return cmd; 3486 } 3487 3488 /* 3489 * Takes arguments and copies them into a comment 3490 */ 3491 static void 3492 fill_comment(ipfw_insn *cmd, char **av, int cblen) 3493 { 3494 int i, l; 3495 char *p = (char *)(cmd + 1); 3496 3497 cmd->opcode = O_NOP; 3498 cmd->len = (cmd->len & (F_NOT | F_OR)); 3499 3500 /* Compute length of comment string. */ 3501 for (i = 0, l = 0; av[i] != NULL; i++) 3502 l += strlen(av[i]) + 1; 3503 if (l == 0) 3504 return; 3505 if (l > 84) 3506 errx(EX_DATAERR, 3507 "comment too long (max 80 chars)"); 3508 l = 1 + (l+3)/4; 3509 cmd->len = (cmd->len & (F_NOT | F_OR)) | l; 3510 CHECK_CMDLEN; 3511 3512 for (i = 0; av[i] != NULL; i++) { 3513 strcpy(p, av[i]); 3514 p += strlen(av[i]); 3515 *p++ = ' '; 3516 } 3517 *(--p) = '\0'; 3518 } 3519 3520 /* 3521 * A function to fill simple commands of size 1. 3522 * Existing flags are preserved. 3523 */ 3524 static void 3525 fill_cmd(ipfw_insn *cmd, enum ipfw_opcodes opcode, int flags, uint16_t arg) 3526 { 3527 cmd->opcode = opcode; 3528 cmd->len = ((cmd->len | flags) & (F_NOT | F_OR)) | 1; 3529 cmd->arg1 = arg; 3530 } 3531 3532 /* 3533 * Fetch and add the MAC address and type, with masks. This generates one or 3534 * two microinstructions, and returns the pointer to the last one. 3535 */ 3536 static ipfw_insn * 3537 add_mac(ipfw_insn *cmd, char *av[], int cblen) 3538 { 3539 ipfw_insn_mac *mac; 3540 3541 if ( ( av[0] == NULL ) || ( av[1] == NULL ) ) 3542 errx(EX_DATAERR, "MAC dst src"); 3543 3544 cmd->opcode = O_MACADDR2; 3545 cmd->len = (cmd->len & (F_NOT | F_OR)) | F_INSN_SIZE(ipfw_insn_mac); 3546 CHECK_CMDLEN; 3547 3548 mac = (ipfw_insn_mac *)cmd; 3549 get_mac_addr_mask(av[0], mac->addr, mac->mask); /* dst */ 3550 get_mac_addr_mask(av[1], &(mac->addr[ETHER_ADDR_LEN]), 3551 &(mac->mask[ETHER_ADDR_LEN])); /* src */ 3552 return cmd; 3553 } 3554 3555 static ipfw_insn * 3556 add_mactype(ipfw_insn *cmd, char *av, int cblen) 3557 { 3558 if (!av) 3559 errx(EX_DATAERR, "missing MAC type"); 3560 if (strcmp(av, "any") != 0) { /* we have a non-null type */ 3561 fill_newports((ipfw_insn_u16 *)cmd, av, IPPROTO_ETHERTYPE, 3562 cblen); 3563 cmd->opcode = O_MAC_TYPE; 3564 return cmd; 3565 } else 3566 return NULL; 3567 } 3568 3569 static ipfw_insn * 3570 add_proto0(ipfw_insn *cmd, char *av, u_char *protop) 3571 { 3572 struct protoent *pe; 3573 char *ep; 3574 int proto; 3575 3576 proto = strtol(av, &ep, 10); 3577 if (*ep != '\0' || proto <= 0) { 3578 if ((pe = getprotobyname(av)) == NULL) 3579 return NULL; 3580 proto = pe->p_proto; 3581 } 3582 3583 fill_cmd(cmd, O_PROTO, 0, proto); 3584 *protop = proto; 3585 return cmd; 3586 } 3587 3588 static ipfw_insn * 3589 add_proto(ipfw_insn *cmd, char *av, u_char *protop) 3590 { 3591 u_char proto = IPPROTO_IP; 3592 3593 if (_substrcmp(av, "all") == 0 || strcmp(av, "ip") == 0) 3594 ; /* do not set O_IP4 nor O_IP6 */ 3595 else if (strcmp(av, "ip4") == 0) 3596 /* explicit "just IPv4" rule */ 3597 fill_cmd(cmd, O_IP4, 0, 0); 3598 else if (strcmp(av, "ip6") == 0) { 3599 /* explicit "just IPv6" rule */ 3600 proto = IPPROTO_IPV6; 3601 fill_cmd(cmd, O_IP6, 0, 0); 3602 } else 3603 return add_proto0(cmd, av, protop); 3604 3605 *protop = proto; 3606 return cmd; 3607 } 3608 3609 static ipfw_insn * 3610 add_proto_compat(ipfw_insn *cmd, char *av, u_char *protop) 3611 { 3612 u_char proto = IPPROTO_IP; 3613 3614 if (_substrcmp(av, "all") == 0 || strcmp(av, "ip") == 0) 3615 ; /* do not set O_IP4 nor O_IP6 */ 3616 else if (strcmp(av, "ipv4") == 0 || strcmp(av, "ip4") == 0) 3617 /* explicit "just IPv4" rule */ 3618 fill_cmd(cmd, O_IP4, 0, 0); 3619 else if (strcmp(av, "ipv6") == 0 || strcmp(av, "ip6") == 0) { 3620 /* explicit "just IPv6" rule */ 3621 proto = IPPROTO_IPV6; 3622 fill_cmd(cmd, O_IP6, 0, 0); 3623 } else 3624 return add_proto0(cmd, av, protop); 3625 3626 *protop = proto; 3627 return cmd; 3628 } 3629 3630 static ipfw_insn * 3631 add_srcip(ipfw_insn *cmd, char *av, int cblen, struct tidx *tstate) 3632 { 3633 fill_ip((ipfw_insn_ip *)cmd, av, cblen, tstate); 3634 if (cmd->opcode == O_IP_DST_SET) /* set */ 3635 cmd->opcode = O_IP_SRC_SET; 3636 else if (cmd->opcode == O_IP_DST_LOOKUP) /* table */ 3637 cmd->opcode = O_IP_SRC_LOOKUP; 3638 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn)) /* me */ 3639 cmd->opcode = O_IP_SRC_ME; 3640 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_u32)) /* one IP */ 3641 cmd->opcode = O_IP_SRC; 3642 else /* addr/mask */ 3643 cmd->opcode = O_IP_SRC_MASK; 3644 return cmd; 3645 } 3646 3647 static ipfw_insn * 3648 add_dstip(ipfw_insn *cmd, char *av, int cblen, struct tidx *tstate) 3649 { 3650 fill_ip((ipfw_insn_ip *)cmd, av, cblen, tstate); 3651 if (cmd->opcode == O_IP_DST_SET) /* set */ 3652 ; 3653 else if (cmd->opcode == O_IP_DST_LOOKUP) /* table */ 3654 ; 3655 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn)) /* me */ 3656 cmd->opcode = O_IP_DST_ME; 3657 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_u32)) /* one IP */ 3658 cmd->opcode = O_IP_DST; 3659 else /* addr/mask */ 3660 cmd->opcode = O_IP_DST_MASK; 3661 return cmd; 3662 } 3663 3664 static struct _s_x f_reserved_keywords[] = { 3665 { "altq", TOK_OR }, 3666 { "//", TOK_OR }, 3667 { "diverted", TOK_OR }, 3668 { "dst-port", TOK_OR }, 3669 { "src-port", TOK_OR }, 3670 { "established", TOK_OR }, 3671 { "keep-state", TOK_OR }, 3672 { "frag", TOK_OR }, 3673 { "icmptypes", TOK_OR }, 3674 { "in", TOK_OR }, 3675 { "out", TOK_OR }, 3676 { "ip6", TOK_OR }, 3677 { "any", TOK_OR }, 3678 { "to", TOK_OR }, 3679 { "via", TOK_OR }, 3680 { "{", TOK_OR }, 3681 { NULL, 0 } /* terminator */ 3682 }; 3683 3684 static ipfw_insn * 3685 add_ports(ipfw_insn *cmd, char *av, u_char proto, int opcode, int cblen) 3686 { 3687 3688 if (match_token(f_reserved_keywords, av) != -1) 3689 return (NULL); 3690 3691 if (fill_newports((ipfw_insn_u16 *)cmd, av, proto, cblen)) { 3692 /* XXX todo: check that we have a protocol with ports */ 3693 cmd->opcode = opcode; 3694 return cmd; 3695 } 3696 return NULL; 3697 } 3698 3699 static ipfw_insn * 3700 add_src(ipfw_insn *cmd, char *av, u_char proto, int cblen, struct tidx *tstate) 3701 { 3702 struct in6_addr a; 3703 char *host, *ch, buf[INET6_ADDRSTRLEN]; 3704 ipfw_insn *ret = NULL; 3705 int len; 3706 3707 /* Copy first address in set if needed */ 3708 if ((ch = strpbrk(av, "/,")) != NULL) { 3709 len = ch - av; 3710 strlcpy(buf, av, sizeof(buf)); 3711 if (len < sizeof(buf)) 3712 buf[len] = '\0'; 3713 host = buf; 3714 } else 3715 host = av; 3716 3717 if (proto == IPPROTO_IPV6 || strcmp(av, "me6") == 0 || 3718 inet_pton(AF_INET6, host, &a) == 1) 3719 ret = add_srcip6(cmd, av, cblen, tstate); 3720 /* XXX: should check for IPv4, not !IPv6 */ 3721 if (ret == NULL && (proto == IPPROTO_IP || strcmp(av, "me") == 0 || 3722 inet_pton(AF_INET6, host, &a) != 1)) 3723 ret = add_srcip(cmd, av, cblen, tstate); 3724 if (ret == NULL && strcmp(av, "any") != 0) 3725 ret = cmd; 3726 3727 return ret; 3728 } 3729 3730 static ipfw_insn * 3731 add_dst(ipfw_insn *cmd, char *av, u_char proto, int cblen, struct tidx *tstate) 3732 { 3733 struct in6_addr a; 3734 char *host, *ch, buf[INET6_ADDRSTRLEN]; 3735 ipfw_insn *ret = NULL; 3736 int len; 3737 3738 /* Copy first address in set if needed */ 3739 if ((ch = strpbrk(av, "/,")) != NULL) { 3740 len = ch - av; 3741 strlcpy(buf, av, sizeof(buf)); 3742 if (len < sizeof(buf)) 3743 buf[len] = '\0'; 3744 host = buf; 3745 } else 3746 host = av; 3747 3748 if (proto == IPPROTO_IPV6 || strcmp(av, "me6") == 0 || 3749 inet_pton(AF_INET6, host, &a) == 1) 3750 ret = add_dstip6(cmd, av, cblen, tstate); 3751 /* XXX: should check for IPv4, not !IPv6 */ 3752 if (ret == NULL && (proto == IPPROTO_IP || strcmp(av, "me") == 0 || 3753 inet_pton(AF_INET6, host, &a) != 1)) 3754 ret = add_dstip(cmd, av, cblen, tstate); 3755 if (ret == NULL && strcmp(av, "any") != 0) 3756 ret = cmd; 3757 3758 return ret; 3759 } 3760 3761 /* 3762 * Parse arguments and assemble the microinstructions which make up a rule. 3763 * Rules are added into the 'rulebuf' and then copied in the correct order 3764 * into the actual rule. 3765 * 3766 * The syntax for a rule starts with the action, followed by 3767 * optional action parameters, and the various match patterns. 3768 * In the assembled microcode, the first opcode must be an O_PROBE_STATE 3769 * (generated if the rule includes a keep-state option), then the 3770 * various match patterns, log/altq actions, and the actual action. 3771 * 3772 */ 3773 void 3774 compile_rule(char *av[], uint32_t *rbuf, int *rbufsize, struct tidx *tstate) 3775 { 3776 /* 3777 * rules are added into the 'rulebuf' and then copied in 3778 * the correct order into the actual rule. 3779 * Some things that need to go out of order (prob, action etc.) 3780 * go into actbuf[]. 3781 */ 3782 static uint32_t actbuf[255], cmdbuf[255]; 3783 int rblen, ablen, cblen; 3784 3785 ipfw_insn *src, *dst, *cmd, *action, *prev=NULL; 3786 ipfw_insn *first_cmd; /* first match pattern */ 3787 3788 struct ip_fw_rule *rule; 3789 3790 /* 3791 * various flags used to record that we entered some fields. 3792 */ 3793 ipfw_insn *have_state = NULL; /* any state-related option */ 3794 int have_rstate = 0; 3795 ipfw_insn *have_log = NULL, *have_altq = NULL, *have_tag = NULL; 3796 ipfw_insn *have_skipcmd = NULL; 3797 size_t len; 3798 3799 int i; 3800 3801 int open_par = 0; /* open parenthesis ( */ 3802 3803 /* proto is here because it is used to fetch ports */ 3804 u_char proto = IPPROTO_IP; /* default protocol */ 3805 3806 double match_prob = 1; /* match probability, default is always match */ 3807 3808 bzero(actbuf, sizeof(actbuf)); /* actions go here */ 3809 bzero(cmdbuf, sizeof(cmdbuf)); 3810 bzero(rbuf, *rbufsize); 3811 3812 rule = (struct ip_fw_rule *)rbuf; 3813 cmd = (ipfw_insn *)cmdbuf; 3814 action = (ipfw_insn *)actbuf; 3815 3816 rblen = *rbufsize / sizeof(uint32_t); 3817 rblen -= sizeof(struct ip_fw_rule) / sizeof(uint32_t); 3818 ablen = sizeof(actbuf) / sizeof(actbuf[0]); 3819 cblen = sizeof(cmdbuf) / sizeof(cmdbuf[0]); 3820 cblen -= F_INSN_SIZE(ipfw_insn_u32) + 1; 3821 3822 #define CHECK_RBUFLEN(len) { CHECK_LENGTH(rblen, len); rblen -= len; } 3823 #define CHECK_ACTLEN CHECK_LENGTH(ablen, action->len) 3824 3825 av++; 3826 3827 /* [rule N] -- Rule number optional */ 3828 if (av[0] && isdigit(**av)) { 3829 rule->rulenum = atoi(*av); 3830 av++; 3831 } 3832 3833 /* [set N] -- set number (0..RESVD_SET), optional */ 3834 if (av[0] && av[1] && _substrcmp(*av, "set") == 0) { 3835 int set = strtoul(av[1], NULL, 10); 3836 if (set < 0 || set > RESVD_SET) 3837 errx(EX_DATAERR, "illegal set %s", av[1]); 3838 rule->set = set; 3839 tstate->set = set; 3840 av += 2; 3841 } 3842 3843 /* [prob D] -- match probability, optional */ 3844 if (av[0] && av[1] && _substrcmp(*av, "prob") == 0) { 3845 match_prob = strtod(av[1], NULL); 3846 3847 if (match_prob <= 0 || match_prob > 1) 3848 errx(EX_DATAERR, "illegal match prob. %s", av[1]); 3849 av += 2; 3850 } 3851 3852 /* action -- mandatory */ 3853 NEED1("missing action"); 3854 i = match_token(rule_actions, *av); 3855 av++; 3856 action->len = 1; /* default */ 3857 CHECK_ACTLEN; 3858 switch(i) { 3859 case TOK_CHECKSTATE: 3860 have_state = action; 3861 action->opcode = O_CHECK_STATE; 3862 if (*av == NULL || 3863 match_token(rule_options, *av) == TOK_COMMENT) { 3864 action->arg1 = pack_object(tstate, 3865 default_state_name, IPFW_TLV_STATE_NAME); 3866 break; 3867 } 3868 if (*av[0] == ':') { 3869 if (strcmp(*av + 1, "any") == 0) 3870 action->arg1 = 0; 3871 else if (state_check_name(*av + 1) == 0) 3872 action->arg1 = pack_object(tstate, *av + 1, 3873 IPFW_TLV_STATE_NAME); 3874 else 3875 errx(EX_DATAERR, "Invalid state name %s", 3876 *av); 3877 av++; 3878 break; 3879 } 3880 errx(EX_DATAERR, "Invalid state name %s", *av); 3881 break; 3882 3883 case TOK_ABORT: 3884 action->opcode = O_REJECT; 3885 action->arg1 = ICMP_REJECT_ABORT; 3886 break; 3887 3888 case TOK_ABORT6: 3889 action->opcode = O_UNREACH6; 3890 action->arg1 = ICMP6_UNREACH_ABORT; 3891 break; 3892 3893 case TOK_ACCEPT: 3894 action->opcode = O_ACCEPT; 3895 break; 3896 3897 case TOK_DENY: 3898 action->opcode = O_DENY; 3899 action->arg1 = 0; 3900 break; 3901 3902 case TOK_REJECT: 3903 action->opcode = O_REJECT; 3904 action->arg1 = ICMP_UNREACH_HOST; 3905 break; 3906 3907 case TOK_RESET: 3908 action->opcode = O_REJECT; 3909 action->arg1 = ICMP_REJECT_RST; 3910 break; 3911 3912 case TOK_RESET6: 3913 action->opcode = O_UNREACH6; 3914 action->arg1 = ICMP6_UNREACH_RST; 3915 break; 3916 3917 case TOK_UNREACH: 3918 action->opcode = O_REJECT; 3919 NEED1("missing reject code"); 3920 fill_reject_code(&action->arg1, *av); 3921 av++; 3922 break; 3923 3924 case TOK_UNREACH6: 3925 action->opcode = O_UNREACH6; 3926 NEED1("missing unreach code"); 3927 fill_unreach6_code(&action->arg1, *av); 3928 av++; 3929 break; 3930 3931 case TOK_COUNT: 3932 action->opcode = O_COUNT; 3933 break; 3934 3935 case TOK_NAT: 3936 action->opcode = O_NAT; 3937 action->len = F_INSN_SIZE(ipfw_insn_nat); 3938 CHECK_ACTLEN; 3939 if (*av != NULL && _substrcmp(*av, "global") == 0) { 3940 action->arg1 = IP_FW_NAT44_GLOBAL; 3941 av++; 3942 break; 3943 } else 3944 goto chkarg; 3945 case TOK_QUEUE: 3946 action->opcode = O_QUEUE; 3947 goto chkarg; 3948 case TOK_PIPE: 3949 action->opcode = O_PIPE; 3950 goto chkarg; 3951 case TOK_SKIPTO: 3952 action->opcode = O_SKIPTO; 3953 goto chkarg; 3954 case TOK_NETGRAPH: 3955 action->opcode = O_NETGRAPH; 3956 goto chkarg; 3957 case TOK_NGTEE: 3958 action->opcode = O_NGTEE; 3959 goto chkarg; 3960 case TOK_DIVERT: 3961 action->opcode = O_DIVERT; 3962 goto chkarg; 3963 case TOK_TEE: 3964 action->opcode = O_TEE; 3965 goto chkarg; 3966 case TOK_CALL: 3967 action->opcode = O_CALLRETURN; 3968 chkarg: 3969 if (!av[0]) 3970 errx(EX_USAGE, "missing argument for %s", *(av - 1)); 3971 if (isdigit(**av)) { 3972 action->arg1 = strtoul(*av, NULL, 10); 3973 if (action->arg1 <= 0 || action->arg1 >= IP_FW_TABLEARG) 3974 errx(EX_DATAERR, "illegal argument for %s", 3975 *(av - 1)); 3976 } else if (_substrcmp(*av, "tablearg") == 0) { 3977 action->arg1 = IP_FW_TARG; 3978 } else if (i == TOK_DIVERT || i == TOK_TEE) { 3979 struct servent *s; 3980 setservent(1); 3981 s = getservbyname(av[0], "divert"); 3982 if (s != NULL) 3983 action->arg1 = ntohs(s->s_port); 3984 else 3985 errx(EX_DATAERR, "illegal divert/tee port"); 3986 } else 3987 errx(EX_DATAERR, "illegal argument for %s", *(av - 1)); 3988 av++; 3989 break; 3990 3991 case TOK_FORWARD: { 3992 /* 3993 * Locate the address-port separator (':' or ','). 3994 * Could be one of the following: 3995 * hostname:port 3996 * IPv4 a.b.c.d,port 3997 * IPv4 a.b.c.d:port 3998 * IPv6 w:x:y::z,port 3999 * The ':' can only be used with hostname and IPv4 address. 4000 * XXX-BZ Should we also support [w:x:y::z]:port? 4001 */ 4002 struct sockaddr_storage result; 4003 struct addrinfo *res; 4004 char *s, *end; 4005 int family; 4006 u_short port_number; 4007 4008 NEED1("missing forward address[:port]"); 4009 4010 /* 4011 * locate the address-port separator (':' or ',') 4012 */ 4013 s = strchr(*av, ','); 4014 if (s == NULL) { 4015 /* Distinguish between IPv4:port and IPv6 cases. */ 4016 s = strchr(*av, ':'); 4017 if (s && strchr(s+1, ':')) 4018 s = NULL; /* no port */ 4019 } 4020 4021 port_number = 0; 4022 if (s != NULL) { 4023 /* Terminate host portion and set s to start of port. */ 4024 *(s++) = '\0'; 4025 i = strtoport(s, &end, 0 /* base */, 0 /* proto */); 4026 if (s == end) 4027 errx(EX_DATAERR, 4028 "illegal forwarding port ``%s''", s); 4029 port_number = (u_short)i; 4030 } 4031 4032 if (_substrcmp(*av, "tablearg") == 0) { 4033 family = PF_INET; 4034 ((struct sockaddr_in*)&result)->sin_addr.s_addr = 4035 INADDR_ANY; 4036 } else { 4037 /* 4038 * Resolve the host name or address to a family and a 4039 * network representation of the address. 4040 */ 4041 if (getaddrinfo(*av, NULL, NULL, &res)) 4042 errx(EX_DATAERR, NULL); 4043 /* Just use the first host in the answer. */ 4044 family = res->ai_family; 4045 memcpy(&result, res->ai_addr, res->ai_addrlen); 4046 freeaddrinfo(res); 4047 } 4048 4049 if (family == PF_INET) { 4050 ipfw_insn_sa *p = (ipfw_insn_sa *)action; 4051 4052 action->opcode = O_FORWARD_IP; 4053 action->len = F_INSN_SIZE(ipfw_insn_sa); 4054 CHECK_ACTLEN; 4055 4056 /* 4057 * In the kernel we assume AF_INET and use only 4058 * sin_port and sin_addr. Remember to set sin_len as 4059 * the routing code seems to use it too. 4060 */ 4061 p->sa.sin_len = sizeof(struct sockaddr_in); 4062 p->sa.sin_family = AF_INET; 4063 p->sa.sin_port = port_number; 4064 p->sa.sin_addr.s_addr = 4065 ((struct sockaddr_in *)&result)->sin_addr.s_addr; 4066 } else if (family == PF_INET6) { 4067 ipfw_insn_sa6 *p = (ipfw_insn_sa6 *)action; 4068 4069 action->opcode = O_FORWARD_IP6; 4070 action->len = F_INSN_SIZE(ipfw_insn_sa6); 4071 CHECK_ACTLEN; 4072 4073 p->sa.sin6_len = sizeof(struct sockaddr_in6); 4074 p->sa.sin6_family = AF_INET6; 4075 p->sa.sin6_port = port_number; 4076 p->sa.sin6_flowinfo = 0; 4077 p->sa.sin6_scope_id = 4078 ((struct sockaddr_in6 *)&result)->sin6_scope_id; 4079 bcopy(&((struct sockaddr_in6*)&result)->sin6_addr, 4080 &p->sa.sin6_addr, sizeof(p->sa.sin6_addr)); 4081 } else { 4082 errx(EX_DATAERR, "Invalid address family in forward action"); 4083 } 4084 av++; 4085 break; 4086 } 4087 case TOK_COMMENT: 4088 /* pretend it is a 'count' rule followed by the comment */ 4089 action->opcode = O_COUNT; 4090 av--; /* go back... */ 4091 break; 4092 4093 case TOK_SETFIB: 4094 { 4095 int numfibs; 4096 size_t intsize = sizeof(int); 4097 4098 action->opcode = O_SETFIB; 4099 NEED1("missing fib number"); 4100 if (_substrcmp(*av, "tablearg") == 0) { 4101 action->arg1 = IP_FW_TARG; 4102 } else { 4103 action->arg1 = strtoul(*av, NULL, 10); 4104 if (sysctlbyname("net.fibs", &numfibs, &intsize, 4105 NULL, 0) == -1) 4106 errx(EX_DATAERR, "fibs not suported.\n"); 4107 if (action->arg1 >= numfibs) /* Temporary */ 4108 errx(EX_DATAERR, "fib too large.\n"); 4109 /* Add high-order bit to fib to make room for tablearg*/ 4110 action->arg1 |= 0x8000; 4111 } 4112 av++; 4113 break; 4114 } 4115 4116 case TOK_SETDSCP: 4117 { 4118 int code; 4119 4120 action->opcode = O_SETDSCP; 4121 NEED1("missing DSCP code"); 4122 if (_substrcmp(*av, "tablearg") == 0) { 4123 action->arg1 = IP_FW_TARG; 4124 } else { 4125 if (isalpha(*av[0])) { 4126 if ((code = match_token(f_ipdscp, *av)) == -1) 4127 errx(EX_DATAERR, "Unknown DSCP code"); 4128 action->arg1 = code; 4129 } else 4130 action->arg1 = strtoul(*av, NULL, 10); 4131 /* 4132 * Add high-order bit to DSCP to make room 4133 * for tablearg 4134 */ 4135 action->arg1 |= 0x8000; 4136 } 4137 av++; 4138 break; 4139 } 4140 4141 case TOK_REASS: 4142 action->opcode = O_REASS; 4143 break; 4144 4145 case TOK_RETURN: 4146 fill_cmd(action, O_CALLRETURN, F_NOT, 0); 4147 break; 4148 4149 case TOK_TCPSETMSS: { 4150 u_long mss; 4151 uint16_t idx; 4152 4153 idx = pack_object(tstate, "tcp-setmss", IPFW_TLV_EACTION); 4154 if (idx == 0) 4155 errx(EX_DATAERR, "pack_object failed"); 4156 fill_cmd(action, O_EXTERNAL_ACTION, 0, idx); 4157 NEED1("Missing MSS value"); 4158 action = next_cmd(action, &ablen); 4159 action->len = 1; 4160 CHECK_ACTLEN; 4161 mss = strtoul(*av, NULL, 10); 4162 if (mss == 0 || mss > UINT16_MAX) 4163 errx(EX_USAGE, "invalid MSS value %s", *av); 4164 fill_cmd(action, O_EXTERNAL_DATA, 0, (uint16_t)mss); 4165 av++; 4166 break; 4167 } 4168 4169 default: 4170 av--; 4171 if (match_token(rule_eactions, *av) == -1) 4172 errx(EX_DATAERR, "invalid action %s\n", *av); 4173 /* 4174 * External actions support. 4175 * XXX: we support only syntax with instance name. 4176 * For known external actions (from rule_eactions list) 4177 * we can handle syntax directly. But with `eaction' 4178 * keyword we can use only `eaction <name> <instance>' 4179 * syntax. 4180 */ 4181 case TOK_EACTION: { 4182 uint16_t idx; 4183 4184 NEED1("Missing eaction name"); 4185 if (eaction_check_name(*av) != 0) 4186 errx(EX_DATAERR, "Invalid eaction name %s", *av); 4187 idx = pack_object(tstate, *av, IPFW_TLV_EACTION); 4188 if (idx == 0) 4189 errx(EX_DATAERR, "pack_object failed"); 4190 fill_cmd(action, O_EXTERNAL_ACTION, 0, idx); 4191 av++; 4192 NEED1("Missing eaction instance name"); 4193 action = next_cmd(action, &ablen); 4194 action->len = 1; 4195 CHECK_ACTLEN; 4196 if (eaction_check_name(*av) != 0) 4197 errx(EX_DATAERR, "Invalid eaction instance name %s", 4198 *av); 4199 /* 4200 * External action instance object has TLV type depended 4201 * from the external action name object index. Since we 4202 * currently don't know this index, use zero as TLV type. 4203 */ 4204 idx = pack_object(tstate, *av, 0); 4205 if (idx == 0) 4206 errx(EX_DATAERR, "pack_object failed"); 4207 fill_cmd(action, O_EXTERNAL_INSTANCE, 0, idx); 4208 av++; 4209 } 4210 } 4211 action = next_cmd(action, &ablen); 4212 4213 /* 4214 * [altq queuename] -- altq tag, optional 4215 * [log [logamount N]] -- log, optional 4216 * 4217 * If they exist, it go first in the cmdbuf, but then it is 4218 * skipped in the copy section to the end of the buffer. 4219 */ 4220 while (av[0] != NULL && (i = match_token(rule_action_params, *av)) != -1) { 4221 av++; 4222 switch (i) { 4223 case TOK_LOG: 4224 { 4225 ipfw_insn_log *c = (ipfw_insn_log *)cmd; 4226 int l; 4227 4228 if (have_log) 4229 errx(EX_DATAERR, 4230 "log cannot be specified more than once"); 4231 have_log = (ipfw_insn *)c; 4232 cmd->len = F_INSN_SIZE(ipfw_insn_log); 4233 CHECK_CMDLEN; 4234 cmd->opcode = O_LOG; 4235 if (av[0] && _substrcmp(*av, "logamount") == 0) { 4236 av++; 4237 NEED1("logamount requires argument"); 4238 l = atoi(*av); 4239 if (l < 0) 4240 errx(EX_DATAERR, 4241 "logamount must be positive"); 4242 c->max_log = l; 4243 av++; 4244 } else { 4245 len = sizeof(c->max_log); 4246 if (sysctlbyname("net.inet.ip.fw.verbose_limit", 4247 &c->max_log, &len, NULL, 0) == -1) { 4248 if (co.test_only) { 4249 c->max_log = 0; 4250 break; 4251 } 4252 errx(1, "sysctlbyname(\"%s\")", 4253 "net.inet.ip.fw.verbose_limit"); 4254 } 4255 } 4256 } 4257 break; 4258 4259 #ifndef NO_ALTQ 4260 case TOK_ALTQ: 4261 { 4262 ipfw_insn_altq *a = (ipfw_insn_altq *)cmd; 4263 4264 NEED1("missing altq queue name"); 4265 if (have_altq) 4266 errx(EX_DATAERR, 4267 "altq cannot be specified more than once"); 4268 have_altq = (ipfw_insn *)a; 4269 cmd->len = F_INSN_SIZE(ipfw_insn_altq); 4270 CHECK_CMDLEN; 4271 cmd->opcode = O_ALTQ; 4272 a->qid = altq_name_to_qid(*av); 4273 av++; 4274 } 4275 break; 4276 #endif 4277 4278 case TOK_TAG: 4279 case TOK_UNTAG: { 4280 uint16_t tag; 4281 4282 if (have_tag) 4283 errx(EX_USAGE, "tag and untag cannot be " 4284 "specified more than once"); 4285 GET_UINT_ARG(tag, IPFW_ARG_MIN, IPFW_ARG_MAX, i, 4286 rule_action_params); 4287 have_tag = cmd; 4288 fill_cmd(cmd, O_TAG, (i == TOK_TAG) ? 0: F_NOT, tag); 4289 av++; 4290 break; 4291 } 4292 4293 default: 4294 abort(); 4295 } 4296 cmd = next_cmd(cmd, &cblen); 4297 } 4298 4299 if (have_state) { /* must be a check-state, we are done */ 4300 if (*av != NULL && 4301 match_token(rule_options, *av) == TOK_COMMENT) { 4302 /* check-state has a comment */ 4303 av++; 4304 fill_comment(cmd, av, cblen); 4305 cmd = next_cmd(cmd, &cblen); 4306 av[0] = NULL; 4307 } 4308 goto done; 4309 } 4310 4311 #define OR_START(target) \ 4312 if (av[0] && (*av[0] == '(' || *av[0] == '{')) { \ 4313 if (open_par) \ 4314 errx(EX_USAGE, "nested \"(\" not allowed\n"); \ 4315 prev = NULL; \ 4316 open_par = 1; \ 4317 if ( (av[0])[1] == '\0') { \ 4318 av++; \ 4319 } else \ 4320 (*av)++; \ 4321 } \ 4322 target: \ 4323 4324 4325 #define CLOSE_PAR \ 4326 if (open_par) { \ 4327 if (av[0] && ( \ 4328 strcmp(*av, ")") == 0 || \ 4329 strcmp(*av, "}") == 0)) { \ 4330 prev = NULL; \ 4331 open_par = 0; \ 4332 av++; \ 4333 } else \ 4334 errx(EX_USAGE, "missing \")\"\n"); \ 4335 } 4336 4337 #define NOT_BLOCK \ 4338 if (av[0] && _substrcmp(*av, "not") == 0) { \ 4339 if (cmd->len & F_NOT) \ 4340 errx(EX_USAGE, "double \"not\" not allowed\n"); \ 4341 cmd->len |= F_NOT; \ 4342 av++; \ 4343 } 4344 4345 #define OR_BLOCK(target) \ 4346 if (av[0] && _substrcmp(*av, "or") == 0) { \ 4347 if (prev == NULL || open_par == 0) \ 4348 errx(EX_DATAERR, "invalid OR block"); \ 4349 prev->len |= F_OR; \ 4350 av++; \ 4351 goto target; \ 4352 } \ 4353 CLOSE_PAR; 4354 4355 first_cmd = cmd; 4356 4357 #if 0 4358 /* 4359 * MAC addresses, optional. 4360 * If we have this, we skip the part "proto from src to dst" 4361 * and jump straight to the option parsing. 4362 */ 4363 NOT_BLOCK; 4364 NEED1("missing protocol"); 4365 if (_substrcmp(*av, "MAC") == 0 || 4366 _substrcmp(*av, "mac") == 0) { 4367 av++; /* the "MAC" keyword */ 4368 add_mac(cmd, av); /* exits in case of errors */ 4369 cmd = next_cmd(cmd); 4370 av += 2; /* dst-mac and src-mac */ 4371 NOT_BLOCK; 4372 NEED1("missing mac type"); 4373 if (add_mactype(cmd, av[0])) 4374 cmd = next_cmd(cmd); 4375 av++; /* any or mac-type */ 4376 goto read_options; 4377 } 4378 #endif 4379 4380 /* 4381 * protocol, mandatory 4382 */ 4383 OR_START(get_proto); 4384 NOT_BLOCK; 4385 NEED1("missing protocol"); 4386 if (add_proto_compat(cmd, *av, &proto)) { 4387 av++; 4388 if (F_LEN(cmd) != 0) { 4389 prev = cmd; 4390 cmd = next_cmd(cmd, &cblen); 4391 } 4392 } else if (first_cmd != cmd) { 4393 errx(EX_DATAERR, "invalid protocol ``%s''", *av); 4394 } else { 4395 rule->flags |= IPFW_RULE_JUSTOPTS; 4396 goto read_options; 4397 } 4398 OR_BLOCK(get_proto); 4399 4400 first_cmd = cmd; /* update pointer to use in compact form */ 4401 4402 /* 4403 * "from", mandatory 4404 */ 4405 if ((av[0] == NULL) || _substrcmp(*av, "from") != 0) 4406 errx(EX_USAGE, "missing ``from''"); 4407 av++; 4408 4409 /* 4410 * source IP, mandatory 4411 */ 4412 OR_START(source_ip); 4413 NOT_BLOCK; /* optional "not" */ 4414 NEED1("missing source address"); 4415 if (add_src(cmd, *av, proto, cblen, tstate)) { 4416 av++; 4417 if (F_LEN(cmd) != 0) { /* ! any */ 4418 prev = cmd; 4419 cmd = next_cmd(cmd, &cblen); 4420 } 4421 } else 4422 errx(EX_USAGE, "bad source address %s", *av); 4423 OR_BLOCK(source_ip); 4424 4425 /* 4426 * source ports, optional 4427 */ 4428 NOT_BLOCK; /* optional "not" */ 4429 if ( av[0] != NULL ) { 4430 if (_substrcmp(*av, "any") == 0 || 4431 add_ports(cmd, *av, proto, O_IP_SRCPORT, cblen)) { 4432 av++; 4433 if (F_LEN(cmd) != 0) 4434 cmd = next_cmd(cmd, &cblen); 4435 } 4436 } 4437 4438 /* 4439 * "to", mandatory 4440 */ 4441 if ( (av[0] == NULL) || _substrcmp(*av, "to") != 0 ) 4442 errx(EX_USAGE, "missing ``to''"); 4443 av++; 4444 4445 /* 4446 * destination, mandatory 4447 */ 4448 OR_START(dest_ip); 4449 NOT_BLOCK; /* optional "not" */ 4450 NEED1("missing dst address"); 4451 if (add_dst(cmd, *av, proto, cblen, tstate)) { 4452 av++; 4453 if (F_LEN(cmd) != 0) { /* ! any */ 4454 prev = cmd; 4455 cmd = next_cmd(cmd, &cblen); 4456 } 4457 } else 4458 errx( EX_USAGE, "bad destination address %s", *av); 4459 OR_BLOCK(dest_ip); 4460 4461 /* 4462 * dest. ports, optional 4463 */ 4464 NOT_BLOCK; /* optional "not" */ 4465 if (av[0]) { 4466 if (_substrcmp(*av, "any") == 0 || 4467 add_ports(cmd, *av, proto, O_IP_DSTPORT, cblen)) { 4468 av++; 4469 if (F_LEN(cmd) != 0) 4470 cmd = next_cmd(cmd, &cblen); 4471 } 4472 } 4473 if (first_cmd == cmd) 4474 rule->flags |= IPFW_RULE_NOOPT; 4475 4476 read_options: 4477 prev = NULL; 4478 while ( av[0] != NULL ) { 4479 char *s; 4480 ipfw_insn_u32 *cmd32; /* alias for cmd */ 4481 4482 s = *av; 4483 cmd32 = (ipfw_insn_u32 *)cmd; 4484 4485 if (*s == '!') { /* alternate syntax for NOT */ 4486 if (cmd->len & F_NOT) 4487 errx(EX_USAGE, "double \"not\" not allowed\n"); 4488 cmd->len = F_NOT; 4489 s++; 4490 } 4491 i = match_token(rule_options, s); 4492 av++; 4493 switch(i) { 4494 case TOK_NOT: 4495 if (cmd->len & F_NOT) 4496 errx(EX_USAGE, "double \"not\" not allowed\n"); 4497 cmd->len = F_NOT; 4498 break; 4499 4500 case TOK_OR: 4501 if (open_par == 0 || prev == NULL) 4502 errx(EX_USAGE, "invalid \"or\" block\n"); 4503 prev->len |= F_OR; 4504 break; 4505 4506 case TOK_STARTBRACE: 4507 if (open_par) 4508 errx(EX_USAGE, "+nested \"(\" not allowed\n"); 4509 open_par = 1; 4510 break; 4511 4512 case TOK_ENDBRACE: 4513 if (!open_par) 4514 errx(EX_USAGE, "+missing \")\"\n"); 4515 open_par = 0; 4516 prev = NULL; 4517 break; 4518 4519 case TOK_IN: 4520 fill_cmd(cmd, O_IN, 0, 0); 4521 break; 4522 4523 case TOK_OUT: 4524 cmd->len ^= F_NOT; /* toggle F_NOT */ 4525 fill_cmd(cmd, O_IN, 0, 0); 4526 break; 4527 4528 case TOK_DIVERTED: 4529 fill_cmd(cmd, O_DIVERTED, 0, 3); 4530 break; 4531 4532 case TOK_DIVERTEDLOOPBACK: 4533 fill_cmd(cmd, O_DIVERTED, 0, 1); 4534 break; 4535 4536 case TOK_DIVERTEDOUTPUT: 4537 fill_cmd(cmd, O_DIVERTED, 0, 2); 4538 break; 4539 4540 case TOK_FRAG: 4541 fill_cmd(cmd, O_FRAG, 0, 0); 4542 break; 4543 4544 case TOK_LAYER2: 4545 fill_cmd(cmd, O_LAYER2, 0, 0); 4546 break; 4547 4548 case TOK_XMIT: 4549 case TOK_RECV: 4550 case TOK_VIA: 4551 NEED1("recv, xmit, via require interface name" 4552 " or address"); 4553 fill_iface((ipfw_insn_if *)cmd, av[0], cblen, tstate); 4554 av++; 4555 if (F_LEN(cmd) == 0) /* not a valid address */ 4556 break; 4557 if (i == TOK_XMIT) 4558 cmd->opcode = O_XMIT; 4559 else if (i == TOK_RECV) 4560 cmd->opcode = O_RECV; 4561 else if (i == TOK_VIA) 4562 cmd->opcode = O_VIA; 4563 break; 4564 4565 case TOK_ICMPTYPES: 4566 NEED1("icmptypes requires list of types"); 4567 fill_icmptypes((ipfw_insn_u32 *)cmd, *av); 4568 av++; 4569 break; 4570 4571 case TOK_ICMP6TYPES: 4572 NEED1("icmptypes requires list of types"); 4573 fill_icmp6types((ipfw_insn_icmp6 *)cmd, *av, cblen); 4574 av++; 4575 break; 4576 4577 case TOK_IPTTL: 4578 NEED1("ipttl requires TTL"); 4579 if (strpbrk(*av, "-,")) { 4580 if (!add_ports(cmd, *av, 0, O_IPTTL, cblen)) 4581 errx(EX_DATAERR, "invalid ipttl %s", *av); 4582 } else 4583 fill_cmd(cmd, O_IPTTL, 0, strtoul(*av, NULL, 0)); 4584 av++; 4585 break; 4586 4587 case TOK_IPID: 4588 NEED1("ipid requires id"); 4589 if (strpbrk(*av, "-,")) { 4590 if (!add_ports(cmd, *av, 0, O_IPID, cblen)) 4591 errx(EX_DATAERR, "invalid ipid %s", *av); 4592 } else 4593 fill_cmd(cmd, O_IPID, 0, strtoul(*av, NULL, 0)); 4594 av++; 4595 break; 4596 4597 case TOK_IPLEN: 4598 NEED1("iplen requires length"); 4599 if (strpbrk(*av, "-,")) { 4600 if (!add_ports(cmd, *av, 0, O_IPLEN, cblen)) 4601 errx(EX_DATAERR, "invalid ip len %s", *av); 4602 } else 4603 fill_cmd(cmd, O_IPLEN, 0, strtoul(*av, NULL, 0)); 4604 av++; 4605 break; 4606 4607 case TOK_IPVER: 4608 NEED1("ipver requires version"); 4609 fill_cmd(cmd, O_IPVER, 0, strtoul(*av, NULL, 0)); 4610 av++; 4611 break; 4612 4613 case TOK_IPPRECEDENCE: 4614 NEED1("ipprecedence requires value"); 4615 fill_cmd(cmd, O_IPPRECEDENCE, 0, 4616 (strtoul(*av, NULL, 0) & 7) << 5); 4617 av++; 4618 break; 4619 4620 case TOK_DSCP: 4621 NEED1("missing DSCP code"); 4622 fill_dscp(cmd, *av, cblen); 4623 av++; 4624 break; 4625 4626 case TOK_IPOPTS: 4627 NEED1("missing argument for ipoptions"); 4628 fill_flags_cmd(cmd, O_IPOPT, f_ipopts, *av); 4629 av++; 4630 break; 4631 4632 case TOK_IPTOS: 4633 NEED1("missing argument for iptos"); 4634 fill_flags_cmd(cmd, O_IPTOS, f_iptos, *av); 4635 av++; 4636 break; 4637 4638 case TOK_UID: 4639 NEED1("uid requires argument"); 4640 { 4641 char *end; 4642 uid_t uid; 4643 struct passwd *pwd; 4644 4645 cmd->opcode = O_UID; 4646 uid = strtoul(*av, &end, 0); 4647 pwd = (*end == '\0') ? getpwuid(uid) : getpwnam(*av); 4648 if (pwd == NULL) 4649 errx(EX_DATAERR, "uid \"%s\" nonexistent", *av); 4650 cmd32->d[0] = pwd->pw_uid; 4651 cmd->len |= F_INSN_SIZE(ipfw_insn_u32); 4652 av++; 4653 } 4654 break; 4655 4656 case TOK_GID: 4657 NEED1("gid requires argument"); 4658 { 4659 char *end; 4660 gid_t gid; 4661 struct group *grp; 4662 4663 cmd->opcode = O_GID; 4664 gid = strtoul(*av, &end, 0); 4665 grp = (*end == '\0') ? getgrgid(gid) : getgrnam(*av); 4666 if (grp == NULL) 4667 errx(EX_DATAERR, "gid \"%s\" nonexistent", *av); 4668 cmd32->d[0] = grp->gr_gid; 4669 cmd->len |= F_INSN_SIZE(ipfw_insn_u32); 4670 av++; 4671 } 4672 break; 4673 4674 case TOK_JAIL: 4675 NEED1("jail requires argument"); 4676 { 4677 char *end; 4678 int jid; 4679 4680 cmd->opcode = O_JAIL; 4681 /* 4682 * If av is a number, then we'll just pass it as-is. If 4683 * it's a name, try to resolve that to a jid. 4684 * 4685 * We save the jail_getid(3) call for a fallback because 4686 * it entails an unconditional trip to the kernel to 4687 * either validate a jid or resolve a name to a jid. 4688 * This specific token doesn't currently require a 4689 * jid to be an active jail, so we save a transition 4690 * by simply using a number that we're given. 4691 */ 4692 jid = strtoul(*av, &end, 10); 4693 if (*end != '\0') { 4694 jid = jail_getid(*av); 4695 if (jid < 0) 4696 errx(EX_DATAERR, "%s", jail_errmsg); 4697 } 4698 cmd32->d[0] = (uint32_t)jid; 4699 cmd->len |= F_INSN_SIZE(ipfw_insn_u32); 4700 av++; 4701 } 4702 break; 4703 4704 case TOK_ESTAB: 4705 fill_cmd(cmd, O_ESTAB, 0, 0); 4706 break; 4707 4708 case TOK_SETUP: 4709 fill_cmd(cmd, O_TCPFLAGS, 0, 4710 (TH_SYN) | ( (TH_ACK) & 0xff) <<8 ); 4711 break; 4712 4713 case TOK_TCPDATALEN: 4714 NEED1("tcpdatalen requires length"); 4715 if (strpbrk(*av, "-,")) { 4716 if (!add_ports(cmd, *av, 0, O_TCPDATALEN, cblen)) 4717 errx(EX_DATAERR, "invalid tcpdata len %s", *av); 4718 } else 4719 fill_cmd(cmd, O_TCPDATALEN, 0, 4720 strtoul(*av, NULL, 0)); 4721 av++; 4722 break; 4723 4724 case TOK_TCPOPTS: 4725 NEED1("missing argument for tcpoptions"); 4726 fill_flags_cmd(cmd, O_TCPOPTS, f_tcpopts, *av); 4727 av++; 4728 break; 4729 4730 case TOK_TCPSEQ: 4731 case TOK_TCPACK: 4732 NEED1("tcpseq/tcpack requires argument"); 4733 cmd->len = F_INSN_SIZE(ipfw_insn_u32); 4734 cmd->opcode = (i == TOK_TCPSEQ) ? O_TCPSEQ : O_TCPACK; 4735 cmd32->d[0] = htonl(strtoul(*av, NULL, 0)); 4736 av++; 4737 break; 4738 4739 case TOK_TCPMSS: 4740 case TOK_TCPWIN: 4741 NEED1("tcpmss/tcpwin requires size"); 4742 if (strpbrk(*av, "-,")) { 4743 if (add_ports(cmd, *av, 0, 4744 i == TOK_TCPWIN ? O_TCPWIN : O_TCPMSS, 4745 cblen) == NULL) 4746 errx(EX_DATAERR, "invalid %s size %s", 4747 s, *av); 4748 } else 4749 fill_cmd(cmd, i == TOK_TCPWIN ? O_TCPWIN : 4750 O_TCPMSS, 0, strtoul(*av, NULL, 0)); 4751 av++; 4752 break; 4753 4754 case TOK_TCPFLAGS: 4755 NEED1("missing argument for tcpflags"); 4756 cmd->opcode = O_TCPFLAGS; 4757 fill_flags_cmd(cmd, O_TCPFLAGS, f_tcpflags, *av); 4758 av++; 4759 break; 4760 4761 case TOK_KEEPSTATE: 4762 case TOK_RECORDSTATE: { 4763 uint16_t uidx; 4764 4765 if (open_par) 4766 errx(EX_USAGE, "keep-state or record-state cannot be part " 4767 "of an or block"); 4768 if (have_state) 4769 errx(EX_USAGE, "only one of keep-state, record-state, " 4770 " limit and set-limit is allowed"); 4771 if (*av != NULL && *av[0] == ':') { 4772 if (state_check_name(*av + 1) != 0) 4773 errx(EX_DATAERR, 4774 "Invalid state name %s", *av); 4775 uidx = pack_object(tstate, *av + 1, 4776 IPFW_TLV_STATE_NAME); 4777 av++; 4778 } else 4779 uidx = pack_object(tstate, default_state_name, 4780 IPFW_TLV_STATE_NAME); 4781 have_state = cmd; 4782 have_rstate = i == TOK_RECORDSTATE; 4783 fill_cmd(cmd, O_KEEP_STATE, 0, uidx); 4784 break; 4785 } 4786 4787 case TOK_LIMIT: 4788 case TOK_SETLIMIT: { 4789 ipfw_insn_limit *c = (ipfw_insn_limit *)cmd; 4790 int val; 4791 4792 if (open_par) 4793 errx(EX_USAGE, 4794 "limit or set-limit cannot be part of an or block"); 4795 if (have_state) 4796 errx(EX_USAGE, "only one of keep-state, record-state, " 4797 " limit and set-limit is allowed"); 4798 have_state = cmd; 4799 have_rstate = i == TOK_SETLIMIT; 4800 4801 cmd->len = F_INSN_SIZE(ipfw_insn_limit); 4802 CHECK_CMDLEN; 4803 cmd->opcode = O_LIMIT; 4804 c->limit_mask = c->conn_limit = 0; 4805 4806 while ( av[0] != NULL ) { 4807 if ((val = match_token(limit_masks, *av)) <= 0) 4808 break; 4809 c->limit_mask |= val; 4810 av++; 4811 } 4812 4813 if (c->limit_mask == 0) 4814 errx(EX_USAGE, "limit: missing limit mask"); 4815 4816 GET_UINT_ARG(c->conn_limit, IPFW_ARG_MIN, IPFW_ARG_MAX, 4817 TOK_LIMIT, rule_options); 4818 av++; 4819 4820 if (*av != NULL && *av[0] == ':') { 4821 if (state_check_name(*av + 1) != 0) 4822 errx(EX_DATAERR, 4823 "Invalid state name %s", *av); 4824 cmd->arg1 = pack_object(tstate, *av + 1, 4825 IPFW_TLV_STATE_NAME); 4826 av++; 4827 } else 4828 cmd->arg1 = pack_object(tstate, 4829 default_state_name, IPFW_TLV_STATE_NAME); 4830 break; 4831 } 4832 4833 case TOK_PROTO: 4834 NEED1("missing protocol"); 4835 if (add_proto(cmd, *av, &proto)) { 4836 av++; 4837 } else 4838 errx(EX_DATAERR, "invalid protocol ``%s''", 4839 *av); 4840 break; 4841 4842 case TOK_SRCIP: 4843 NEED1("missing source IP"); 4844 if (add_srcip(cmd, *av, cblen, tstate)) { 4845 av++; 4846 } 4847 break; 4848 4849 case TOK_DSTIP: 4850 NEED1("missing destination IP"); 4851 if (add_dstip(cmd, *av, cblen, tstate)) { 4852 av++; 4853 } 4854 break; 4855 4856 case TOK_SRCIP6: 4857 NEED1("missing source IP6"); 4858 if (add_srcip6(cmd, *av, cblen, tstate)) { 4859 av++; 4860 } 4861 break; 4862 4863 case TOK_DSTIP6: 4864 NEED1("missing destination IP6"); 4865 if (add_dstip6(cmd, *av, cblen, tstate)) { 4866 av++; 4867 } 4868 break; 4869 4870 case TOK_SRCPORT: 4871 NEED1("missing source port"); 4872 if (_substrcmp(*av, "any") == 0 || 4873 add_ports(cmd, *av, proto, O_IP_SRCPORT, cblen)) { 4874 av++; 4875 } else 4876 errx(EX_DATAERR, "invalid source port %s", *av); 4877 break; 4878 4879 case TOK_DSTPORT: 4880 NEED1("missing destination port"); 4881 if (_substrcmp(*av, "any") == 0 || 4882 add_ports(cmd, *av, proto, O_IP_DSTPORT, cblen)) { 4883 av++; 4884 } else 4885 errx(EX_DATAERR, "invalid destination port %s", 4886 *av); 4887 break; 4888 4889 case TOK_MAC: 4890 if (add_mac(cmd, av, cblen)) 4891 av += 2; 4892 break; 4893 4894 case TOK_MACTYPE: 4895 NEED1("missing mac type"); 4896 if (!add_mactype(cmd, *av, cblen)) 4897 errx(EX_DATAERR, "invalid mac type %s", *av); 4898 av++; 4899 break; 4900 4901 case TOK_VERREVPATH: 4902 fill_cmd(cmd, O_VERREVPATH, 0, 0); 4903 break; 4904 4905 case TOK_VERSRCREACH: 4906 fill_cmd(cmd, O_VERSRCREACH, 0, 0); 4907 break; 4908 4909 case TOK_ANTISPOOF: 4910 fill_cmd(cmd, O_ANTISPOOF, 0, 0); 4911 break; 4912 4913 case TOK_IPSEC: 4914 fill_cmd(cmd, O_IPSEC, 0, 0); 4915 break; 4916 4917 case TOK_IPV6: 4918 fill_cmd(cmd, O_IP6, 0, 0); 4919 break; 4920 4921 case TOK_IPV4: 4922 fill_cmd(cmd, O_IP4, 0, 0); 4923 break; 4924 4925 case TOK_EXT6HDR: 4926 fill_ext6hdr( cmd, *av ); 4927 av++; 4928 break; 4929 4930 case TOK_FLOWID: 4931 if (proto != IPPROTO_IPV6 ) 4932 errx( EX_USAGE, "flow-id filter is active " 4933 "only for ipv6 protocol\n"); 4934 fill_flow6( (ipfw_insn_u32 *) cmd, *av, cblen); 4935 av++; 4936 break; 4937 4938 case TOK_COMMENT: 4939 fill_comment(cmd, av, cblen); 4940 av[0]=NULL; 4941 break; 4942 4943 case TOK_TAGGED: 4944 if (av[0] && strpbrk(*av, "-,")) { 4945 if (!add_ports(cmd, *av, 0, O_TAGGED, cblen)) 4946 errx(EX_DATAERR, "tagged: invalid tag" 4947 " list: %s", *av); 4948 } 4949 else { 4950 uint16_t tag; 4951 4952 GET_UINT_ARG(tag, IPFW_ARG_MIN, IPFW_ARG_MAX, 4953 TOK_TAGGED, rule_options); 4954 fill_cmd(cmd, O_TAGGED, 0, tag); 4955 } 4956 av++; 4957 break; 4958 4959 case TOK_FIB: 4960 NEED1("fib requires fib number"); 4961 fill_cmd(cmd, O_FIB, 0, strtoul(*av, NULL, 0)); 4962 av++; 4963 break; 4964 case TOK_SOCKARG: 4965 fill_cmd(cmd, O_SOCKARG, 0, 0); 4966 break; 4967 4968 case TOK_LOOKUP: { 4969 ipfw_insn_u32 *c = (ipfw_insn_u32 *)cmd; 4970 int j; 4971 4972 if (!av[0] || !av[1]) 4973 errx(EX_USAGE, "format: lookup argument tablenum"); 4974 cmd->opcode = O_IP_DST_LOOKUP; 4975 cmd->len |= F_INSN_SIZE(ipfw_insn) + 2; 4976 i = match_token(rule_options, *av); 4977 for (j = 0; lookup_key[j] >= 0 ; j++) { 4978 if (i == lookup_key[j]) 4979 break; 4980 } 4981 if (lookup_key[j] <= 0) 4982 errx(EX_USAGE, "format: cannot lookup on %s", *av); 4983 __PAST_END(c->d, 1) = j; // i converted to option 4984 av++; 4985 4986 if ((j = pack_table(tstate, *av)) == 0) 4987 errx(EX_DATAERR, "Invalid table name: %s", *av); 4988 4989 cmd->arg1 = j; 4990 av++; 4991 } 4992 break; 4993 case TOK_FLOW: 4994 NEED1("missing table name"); 4995 if (strncmp(*av, "table(", 6) != 0) 4996 errx(EX_DATAERR, 4997 "enclose table name into \"table()\""); 4998 fill_table(cmd, *av, O_IP_FLOW_LOOKUP, tstate); 4999 av++; 5000 break; 5001 5002 case TOK_SKIPACTION: 5003 if (have_skipcmd) 5004 errx(EX_USAGE, "only one defer-action " 5005 "is allowed"); 5006 have_skipcmd = cmd; 5007 fill_cmd(cmd, O_SKIP_ACTION, 0, 0); 5008 break; 5009 5010 default: 5011 errx(EX_USAGE, "unrecognised option [%d] %s\n", i, s); 5012 } 5013 if (F_LEN(cmd) > 0) { /* prepare to advance */ 5014 prev = cmd; 5015 cmd = next_cmd(cmd, &cblen); 5016 } 5017 } 5018 5019 done: 5020 5021 if (!have_state && have_skipcmd) 5022 warnx("Rule contains \"defer-immediate-action\" " 5023 "and doesn't contain any state-related options."); 5024 5025 /* 5026 * Now copy stuff into the rule. 5027 * If we have a keep-state option, the first instruction 5028 * must be a PROBE_STATE (which is generated here). 5029 * If we have a LOG option, it was stored as the first command, 5030 * and now must be moved to the top of the action part. 5031 */ 5032 dst = (ipfw_insn *)rule->cmd; 5033 5034 /* 5035 * First thing to write into the command stream is the match probability. 5036 */ 5037 if (match_prob != 1) { /* 1 means always match */ 5038 dst->opcode = O_PROB; 5039 dst->len = 2; 5040 *((int32_t *)(dst+1)) = (int32_t)(match_prob * 0x7fffffff); 5041 dst += dst->len; 5042 } 5043 5044 /* 5045 * generate O_PROBE_STATE if necessary 5046 */ 5047 if (have_state && have_state->opcode != O_CHECK_STATE && !have_rstate) { 5048 fill_cmd(dst, O_PROBE_STATE, 0, have_state->arg1); 5049 dst = next_cmd(dst, &rblen); 5050 } 5051 5052 /* 5053 * copy all commands but O_LOG, O_KEEP_STATE, O_LIMIT, O_ALTQ, O_TAG, 5054 * O_SKIP_ACTION 5055 */ 5056 for (src = (ipfw_insn *)cmdbuf; src != cmd; src += i) { 5057 i = F_LEN(src); 5058 CHECK_RBUFLEN(i); 5059 5060 switch (src->opcode) { 5061 case O_LOG: 5062 case O_KEEP_STATE: 5063 case O_LIMIT: 5064 case O_ALTQ: 5065 case O_TAG: 5066 case O_SKIP_ACTION: 5067 break; 5068 default: 5069 bcopy(src, dst, i * sizeof(uint32_t)); 5070 dst += i; 5071 } 5072 } 5073 5074 /* 5075 * put back the have_state command as last opcode 5076 */ 5077 if (have_state && have_state->opcode != O_CHECK_STATE) { 5078 i = F_LEN(have_state); 5079 CHECK_RBUFLEN(i); 5080 bcopy(have_state, dst, i * sizeof(uint32_t)); 5081 dst += i; 5082 } 5083 5084 /* 5085 * put back the have_skipcmd command as very last opcode 5086 */ 5087 if (have_skipcmd) { 5088 i = F_LEN(have_skipcmd); 5089 CHECK_RBUFLEN(i); 5090 bcopy(have_skipcmd, dst, i * sizeof(uint32_t)); 5091 dst += i; 5092 } 5093 5094 /* 5095 * start action section 5096 */ 5097 rule->act_ofs = dst - rule->cmd; 5098 5099 /* put back O_LOG, O_ALTQ, O_TAG if necessary */ 5100 if (have_log) { 5101 i = F_LEN(have_log); 5102 CHECK_RBUFLEN(i); 5103 bcopy(have_log, dst, i * sizeof(uint32_t)); 5104 dst += i; 5105 } 5106 if (have_altq) { 5107 i = F_LEN(have_altq); 5108 CHECK_RBUFLEN(i); 5109 bcopy(have_altq, dst, i * sizeof(uint32_t)); 5110 dst += i; 5111 } 5112 if (have_tag) { 5113 i = F_LEN(have_tag); 5114 CHECK_RBUFLEN(i); 5115 bcopy(have_tag, dst, i * sizeof(uint32_t)); 5116 dst += i; 5117 } 5118 5119 /* 5120 * copy all other actions 5121 */ 5122 for (src = (ipfw_insn *)actbuf; src != action; src += i) { 5123 i = F_LEN(src); 5124 CHECK_RBUFLEN(i); 5125 bcopy(src, dst, i * sizeof(uint32_t)); 5126 dst += i; 5127 } 5128 5129 rule->cmd_len = (uint32_t *)dst - (uint32_t *)(rule->cmd); 5130 *rbufsize = (char *)dst - (char *)rule; 5131 } 5132 5133 static int 5134 compare_ntlv(const void *_a, const void *_b) 5135 { 5136 ipfw_obj_ntlv *a, *b; 5137 5138 a = (ipfw_obj_ntlv *)_a; 5139 b = (ipfw_obj_ntlv *)_b; 5140 5141 if (a->set < b->set) 5142 return (-1); 5143 else if (a->set > b->set) 5144 return (1); 5145 5146 if (a->idx < b->idx) 5147 return (-1); 5148 else if (a->idx > b->idx) 5149 return (1); 5150 5151 if (a->head.type < b->head.type) 5152 return (-1); 5153 else if (a->head.type > b->head.type) 5154 return (1); 5155 5156 return (0); 5157 } 5158 5159 /* 5160 * Provide kernel with sorted list of referenced objects 5161 */ 5162 static void 5163 object_sort_ctlv(ipfw_obj_ctlv *ctlv) 5164 { 5165 5166 qsort(ctlv + 1, ctlv->count, ctlv->objsize, compare_ntlv); 5167 } 5168 5169 struct object_kt { 5170 uint16_t uidx; 5171 uint16_t type; 5172 }; 5173 static int 5174 compare_object_kntlv(const void *k, const void *v) 5175 { 5176 ipfw_obj_ntlv *ntlv; 5177 struct object_kt key; 5178 5179 key = *((struct object_kt *)k); 5180 ntlv = (ipfw_obj_ntlv *)v; 5181 5182 if (key.uidx < ntlv->idx) 5183 return (-1); 5184 else if (key.uidx > ntlv->idx) 5185 return (1); 5186 5187 if (key.type < ntlv->head.type) 5188 return (-1); 5189 else if (key.type > ntlv->head.type) 5190 return (1); 5191 5192 return (0); 5193 } 5194 5195 /* 5196 * Finds object name in @ctlv by @idx and @type. 5197 * Uses the following facts: 5198 * 1) All TLVs are the same size 5199 * 2) Kernel implementation provides already sorted list. 5200 * 5201 * Returns table name or NULL. 5202 */ 5203 static char * 5204 object_search_ctlv(ipfw_obj_ctlv *ctlv, uint16_t idx, uint16_t type) 5205 { 5206 ipfw_obj_ntlv *ntlv; 5207 struct object_kt key; 5208 5209 key.uidx = idx; 5210 key.type = type; 5211 5212 ntlv = bsearch(&key, (ctlv + 1), ctlv->count, ctlv->objsize, 5213 compare_object_kntlv); 5214 5215 if (ntlv != NULL) 5216 return (ntlv->name); 5217 5218 return (NULL); 5219 } 5220 5221 static char * 5222 table_search_ctlv(ipfw_obj_ctlv *ctlv, uint16_t idx) 5223 { 5224 5225 return (object_search_ctlv(ctlv, idx, IPFW_TLV_TBL_NAME)); 5226 } 5227 5228 /* 5229 * Adds one or more rules to ipfw chain. 5230 * Data layout: 5231 * Request: 5232 * [ 5233 * ip_fw3_opheader 5234 * [ ipfw_obj_ctlv(IPFW_TLV_TBL_LIST) ipfw_obj_ntlv x N ] (optional *1) 5235 * [ ipfw_obj_ctlv(IPFW_TLV_RULE_LIST) [ ip_fw_rule ip_fw_insn ] x N ] (*2) (*3) 5236 * ] 5237 * Reply: 5238 * [ 5239 * ip_fw3_opheader 5240 * [ ipfw_obj_ctlv(IPFW_TLV_TBL_LIST) ipfw_obj_ntlv x N ] (optional) 5241 * [ ipfw_obj_ctlv(IPFW_TLV_RULE_LIST) [ ip_fw_rule ip_fw_insn ] x N ] 5242 * ] 5243 * 5244 * Rules in reply are modified to store their actual ruleset number. 5245 * 5246 * (*1) TLVs inside IPFW_TLV_TBL_LIST needs to be sorted ascending 5247 * according to their idx field and there has to be no duplicates. 5248 * (*2) Numbered rules inside IPFW_TLV_RULE_LIST needs to be sorted ascending. 5249 * (*3) Each ip_fw structure needs to be aligned to u64 boundary. 5250 */ 5251 void 5252 ipfw_add(char *av[]) 5253 { 5254 uint32_t rulebuf[1024]; 5255 int rbufsize, default_off, tlen, rlen; 5256 size_t sz; 5257 struct tidx ts; 5258 struct ip_fw_rule *rule; 5259 caddr_t tbuf; 5260 ip_fw3_opheader *op3; 5261 ipfw_obj_ctlv *ctlv, *tstate; 5262 5263 rbufsize = sizeof(rulebuf); 5264 memset(rulebuf, 0, rbufsize); 5265 memset(&ts, 0, sizeof(ts)); 5266 5267 /* Optimize case with no tables */ 5268 default_off = sizeof(ipfw_obj_ctlv) + sizeof(ip_fw3_opheader); 5269 op3 = (ip_fw3_opheader *)rulebuf; 5270 ctlv = (ipfw_obj_ctlv *)(op3 + 1); 5271 rule = (struct ip_fw_rule *)(ctlv + 1); 5272 rbufsize -= default_off; 5273 5274 compile_rule(av, (uint32_t *)rule, &rbufsize, &ts); 5275 /* Align rule size to u64 boundary */ 5276 rlen = roundup2(rbufsize, sizeof(uint64_t)); 5277 5278 tbuf = NULL; 5279 sz = 0; 5280 tstate = NULL; 5281 if (ts.count != 0) { 5282 /* Some tables. We have to alloc more data */ 5283 tlen = ts.count * sizeof(ipfw_obj_ntlv); 5284 sz = default_off + sizeof(ipfw_obj_ctlv) + tlen + rlen; 5285 5286 if ((tbuf = calloc(1, sz)) == NULL) 5287 err(EX_UNAVAILABLE, "malloc() failed for IP_FW_ADD"); 5288 op3 = (ip_fw3_opheader *)tbuf; 5289 /* Tables first */ 5290 ctlv = (ipfw_obj_ctlv *)(op3 + 1); 5291 ctlv->head.type = IPFW_TLV_TBLNAME_LIST; 5292 ctlv->head.length = sizeof(ipfw_obj_ctlv) + tlen; 5293 ctlv->count = ts.count; 5294 ctlv->objsize = sizeof(ipfw_obj_ntlv); 5295 memcpy(ctlv + 1, ts.idx, tlen); 5296 object_sort_ctlv(ctlv); 5297 tstate = ctlv; 5298 /* Rule next */ 5299 ctlv = (ipfw_obj_ctlv *)((caddr_t)ctlv + ctlv->head.length); 5300 ctlv->head.type = IPFW_TLV_RULE_LIST; 5301 ctlv->head.length = sizeof(ipfw_obj_ctlv) + rlen; 5302 ctlv->count = 1; 5303 memcpy(ctlv + 1, rule, rbufsize); 5304 } else { 5305 /* Simply add header */ 5306 sz = rlen + default_off; 5307 memset(ctlv, 0, sizeof(*ctlv)); 5308 ctlv->head.type = IPFW_TLV_RULE_LIST; 5309 ctlv->head.length = sizeof(ipfw_obj_ctlv) + rlen; 5310 ctlv->count = 1; 5311 } 5312 5313 if (do_get3(IP_FW_XADD, op3, &sz) != 0) 5314 err(EX_UNAVAILABLE, "getsockopt(%s)", "IP_FW_XADD"); 5315 5316 if (!co.do_quiet) { 5317 struct format_opts sfo; 5318 struct buf_pr bp; 5319 memset(&sfo, 0, sizeof(sfo)); 5320 sfo.tstate = tstate; 5321 sfo.set_mask = (uint32_t)(-1); 5322 bp_alloc(&bp, 4096); 5323 show_static_rule(&co, &sfo, &bp, rule, NULL); 5324 printf("%s", bp.buf); 5325 bp_free(&bp); 5326 } 5327 5328 if (tbuf != NULL) 5329 free(tbuf); 5330 5331 if (ts.idx != NULL) 5332 free(ts.idx); 5333 } 5334 5335 /* 5336 * clear the counters or the log counters. 5337 * optname has the following values: 5338 * 0 (zero both counters and logging) 5339 * 1 (zero logging only) 5340 */ 5341 void 5342 ipfw_zero(int ac, char *av[], int optname) 5343 { 5344 ipfw_range_tlv rt; 5345 char const *errstr; 5346 char const *name = optname ? "RESETLOG" : "ZERO"; 5347 uint32_t arg; 5348 int failed = EX_OK; 5349 5350 optname = optname ? IP_FW_XRESETLOG : IP_FW_XZERO; 5351 av++; ac--; 5352 5353 if (ac == 0) { 5354 /* clear all entries */ 5355 memset(&rt, 0, sizeof(rt)); 5356 rt.flags = IPFW_RCFLAG_ALL; 5357 if (do_range_cmd(optname, &rt) < 0) 5358 err(EX_UNAVAILABLE, "setsockopt(IP_FW_X%s)", name); 5359 if (!co.do_quiet) 5360 printf("%s.\n", optname == IP_FW_XZERO ? 5361 "Accounting cleared":"Logging counts reset"); 5362 5363 return; 5364 } 5365 5366 while (ac) { 5367 /* Rule number */ 5368 if (isdigit(**av)) { 5369 arg = strtonum(*av, 0, 0xffff, &errstr); 5370 if (errstr) 5371 errx(EX_DATAERR, 5372 "invalid rule number %s\n", *av); 5373 memset(&rt, 0, sizeof(rt)); 5374 rt.start_rule = arg; 5375 rt.end_rule = arg; 5376 rt.flags |= IPFW_RCFLAG_RANGE; 5377 if (co.use_set != 0) { 5378 rt.set = co.use_set - 1; 5379 rt.flags |= IPFW_RCFLAG_SET; 5380 } 5381 if (do_range_cmd(optname, &rt) != 0) { 5382 warn("rule %u: setsockopt(IP_FW_X%s)", 5383 arg, name); 5384 failed = EX_UNAVAILABLE; 5385 } else if (rt.new_set == 0) { 5386 printf("Entry %d not found\n", arg); 5387 failed = EX_UNAVAILABLE; 5388 } else if (!co.do_quiet) 5389 printf("Entry %d %s.\n", arg, 5390 optname == IP_FW_XZERO ? 5391 "cleared" : "logging count reset"); 5392 } else { 5393 errx(EX_USAGE, "invalid rule number ``%s''", *av); 5394 } 5395 av++; ac--; 5396 } 5397 if (failed != EX_OK) 5398 exit(failed); 5399 } 5400 5401 void 5402 ipfw_flush(int force) 5403 { 5404 ipfw_range_tlv rt; 5405 5406 if (!force && !co.do_quiet) { /* need to ask user */ 5407 int c; 5408 5409 printf("Are you sure? [yn] "); 5410 fflush(stdout); 5411 do { 5412 c = toupper(getc(stdin)); 5413 while (c != '\n' && getc(stdin) != '\n') 5414 if (feof(stdin)) 5415 return; /* and do not flush */ 5416 } while (c != 'Y' && c != 'N'); 5417 printf("\n"); 5418 if (c == 'N') /* user said no */ 5419 return; 5420 } 5421 if (co.do_pipe) { 5422 dummynet_flush(); 5423 return; 5424 } 5425 /* `ipfw set N flush` - is the same that `ipfw delete set N` */ 5426 memset(&rt, 0, sizeof(rt)); 5427 if (co.use_set != 0) { 5428 rt.set = co.use_set - 1; 5429 rt.flags = IPFW_RCFLAG_SET; 5430 } else 5431 rt.flags = IPFW_RCFLAG_ALL; 5432 if (do_range_cmd(IP_FW_XDEL, &rt) != 0) 5433 err(EX_UNAVAILABLE, "setsockopt(IP_FW_XDEL)"); 5434 if (!co.do_quiet) 5435 printf("Flushed all %s.\n", co.do_pipe ? "pipes" : "rules"); 5436 } 5437 5438 static struct _s_x intcmds[] = { 5439 { "talist", TOK_TALIST }, 5440 { "iflist", TOK_IFLIST }, 5441 { "olist", TOK_OLIST }, 5442 { "vlist", TOK_VLIST }, 5443 { NULL, 0 } 5444 }; 5445 5446 static struct _s_x otypes[] = { 5447 { "EACTION", IPFW_TLV_EACTION }, 5448 { "DYNSTATE", IPFW_TLV_STATE_NAME }, 5449 { NULL, 0 } 5450 }; 5451 5452 static const char* 5453 lookup_eaction_name(ipfw_obj_ntlv *ntlv, int cnt, uint16_t type) 5454 { 5455 const char *name; 5456 int i; 5457 5458 name = NULL; 5459 for (i = 0; i < cnt; i++) { 5460 if (ntlv[i].head.type != IPFW_TLV_EACTION) 5461 continue; 5462 if (IPFW_TLV_EACTION_NAME(ntlv[i].idx) != type) 5463 continue; 5464 name = ntlv[i].name; 5465 break; 5466 } 5467 return (name); 5468 } 5469 5470 static void 5471 ipfw_list_objects(int ac, char *av[]) 5472 { 5473 ipfw_obj_lheader req, *olh; 5474 ipfw_obj_ntlv *ntlv; 5475 const char *name; 5476 size_t sz; 5477 int i; 5478 5479 memset(&req, 0, sizeof(req)); 5480 sz = sizeof(req); 5481 if (do_get3(IP_FW_DUMP_SRVOBJECTS, &req.opheader, &sz) != 0) 5482 if (errno != ENOMEM) 5483 return; 5484 5485 sz = req.size; 5486 if ((olh = calloc(1, sz)) == NULL) 5487 return; 5488 5489 olh->size = sz; 5490 if (do_get3(IP_FW_DUMP_SRVOBJECTS, &olh->opheader, &sz) != 0) { 5491 free(olh); 5492 return; 5493 } 5494 5495 if (olh->count > 0) 5496 printf("Objects list:\n"); 5497 else 5498 printf("There are no objects\n"); 5499 ntlv = (ipfw_obj_ntlv *)(olh + 1); 5500 for (i = 0; i < olh->count; i++) { 5501 name = match_value(otypes, ntlv->head.type); 5502 if (name == NULL) 5503 name = lookup_eaction_name( 5504 (ipfw_obj_ntlv *)(olh + 1), olh->count, 5505 ntlv->head.type); 5506 if (name == NULL) 5507 printf(" kidx: %4d\ttype: %10d\tname: %s\n", 5508 ntlv->idx, ntlv->head.type, ntlv->name); 5509 else 5510 printf(" kidx: %4d\ttype: %10s\tname: %s\n", 5511 ntlv->idx, name, ntlv->name); 5512 ntlv++; 5513 } 5514 free(olh); 5515 } 5516 5517 void 5518 ipfw_internal_handler(int ac, char *av[]) 5519 { 5520 int tcmd; 5521 5522 ac--; av++; 5523 NEED1("internal cmd required"); 5524 5525 if ((tcmd = match_token(intcmds, *av)) == -1) 5526 errx(EX_USAGE, "invalid internal sub-cmd: %s", *av); 5527 5528 switch (tcmd) { 5529 case TOK_IFLIST: 5530 ipfw_list_tifaces(); 5531 break; 5532 case TOK_TALIST: 5533 ipfw_list_ta(ac, av); 5534 break; 5535 case TOK_OLIST: 5536 ipfw_list_objects(ac, av); 5537 break; 5538 case TOK_VLIST: 5539 ipfw_list_values(ac, av); 5540 break; 5541 } 5542 } 5543 5544 static int 5545 ipfw_get_tracked_ifaces(ipfw_obj_lheader **polh) 5546 { 5547 ipfw_obj_lheader req, *olh; 5548 size_t sz; 5549 5550 memset(&req, 0, sizeof(req)); 5551 sz = sizeof(req); 5552 5553 if (do_get3(IP_FW_XIFLIST, &req.opheader, &sz) != 0) { 5554 if (errno != ENOMEM) 5555 return (errno); 5556 } 5557 5558 sz = req.size; 5559 if ((olh = calloc(1, sz)) == NULL) 5560 return (ENOMEM); 5561 5562 olh->size = sz; 5563 if (do_get3(IP_FW_XIFLIST, &olh->opheader, &sz) != 0) { 5564 free(olh); 5565 return (errno); 5566 } 5567 5568 *polh = olh; 5569 return (0); 5570 } 5571 5572 static int 5573 ifinfo_cmp(const void *a, const void *b) 5574 { 5575 ipfw_iface_info *ia, *ib; 5576 5577 ia = (ipfw_iface_info *)a; 5578 ib = (ipfw_iface_info *)b; 5579 5580 return (stringnum_cmp(ia->ifname, ib->ifname)); 5581 } 5582 5583 /* 5584 * Retrieves table list from kernel, 5585 * optionally sorts it and calls requested function for each table. 5586 * Returns 0 on success. 5587 */ 5588 static void 5589 ipfw_list_tifaces() 5590 { 5591 ipfw_obj_lheader *olh; 5592 ipfw_iface_info *info; 5593 int i, error; 5594 5595 if ((error = ipfw_get_tracked_ifaces(&olh)) != 0) 5596 err(EX_OSERR, "Unable to request ipfw tracked interface list"); 5597 5598 5599 qsort(olh + 1, olh->count, olh->objsize, ifinfo_cmp); 5600 5601 info = (ipfw_iface_info *)(olh + 1); 5602 for (i = 0; i < olh->count; i++) { 5603 if (info->flags & IPFW_IFFLAG_RESOLVED) 5604 printf("%s ifindex: %d refcount: %u changes: %u\n", 5605 info->ifname, info->ifindex, info->refcnt, 5606 info->gencnt); 5607 else 5608 printf("%s ifindex: unresolved refcount: %u changes: %u\n", 5609 info->ifname, info->refcnt, info->gencnt); 5610 info = (ipfw_iface_info *)((caddr_t)info + olh->objsize); 5611 } 5612 5613 free(olh); 5614 } 5615 5616 5617 5618 5619