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 2227 /* Print source */ 2228 bprintf(bp, " from"); 2229 print_address(bp, fo, &state, src_opcodes, nitems(src_opcodes), 2230 O_IP_SRCPORT, HAVE_SRCIP); 2231 2232 /* Print destination */ 2233 bprintf(bp, " to"); 2234 print_address(bp, fo, &state, dst_opcodes, nitems(dst_opcodes), 2235 O_IP_DSTPORT, HAVE_DSTIP); 2236 2237 justopts: 2238 /* Print the rest of options */ 2239 while (print_opcode(bp, fo, &state, -1)) 2240 ; 2241 end: 2242 /* Print comment at the end */ 2243 cmd = print_opcode(bp, fo, &state, O_NOP); 2244 if (co->comment_only != 0 && cmd == NULL) 2245 bprintf(bp, " // ..."); 2246 bprintf(bp, "\n"); 2247 free_show_state(&state); 2248 } 2249 2250 static void 2251 show_dyn_state(struct cmdline_opts *co, struct format_opts *fo, 2252 struct buf_pr *bp, ipfw_dyn_rule *d) 2253 { 2254 struct protoent *pe; 2255 struct in_addr a; 2256 uint16_t rulenum; 2257 char buf[INET6_ADDRSTRLEN]; 2258 2259 if (d->expire == 0 && d->dyn_type != O_LIMIT_PARENT) 2260 return; 2261 2262 bcopy(&d->rule, &rulenum, sizeof(rulenum)); 2263 bprintf(bp, "%05d", rulenum); 2264 if (fo->pcwidth > 0 || fo->bcwidth > 0) { 2265 bprintf(bp, " "); 2266 pr_u64(bp, &d->pcnt, fo->pcwidth); 2267 pr_u64(bp, &d->bcnt, fo->bcwidth); 2268 bprintf(bp, "(%ds)", d->expire); 2269 } 2270 switch (d->dyn_type) { 2271 case O_LIMIT_PARENT: 2272 bprintf(bp, " PARENT %d", d->count); 2273 break; 2274 case O_LIMIT: 2275 bprintf(bp, " LIMIT"); 2276 break; 2277 case O_KEEP_STATE: /* bidir, no mask */ 2278 bprintf(bp, " STATE"); 2279 break; 2280 } 2281 2282 if ((pe = getprotobynumber(d->id.proto)) != NULL) 2283 bprintf(bp, " %s", pe->p_name); 2284 else 2285 bprintf(bp, " proto %u", d->id.proto); 2286 2287 if (d->id.addr_type == 4) { 2288 a.s_addr = htonl(d->id.src_ip); 2289 bprintf(bp, " %s %d", inet_ntoa(a), d->id.src_port); 2290 2291 a.s_addr = htonl(d->id.dst_ip); 2292 bprintf(bp, " <-> %s %d", inet_ntoa(a), d->id.dst_port); 2293 } else if (d->id.addr_type == 6) { 2294 bprintf(bp, " %s %d", inet_ntop(AF_INET6, &d->id.src_ip6, buf, 2295 sizeof(buf)), d->id.src_port); 2296 bprintf(bp, " <-> %s %d", inet_ntop(AF_INET6, &d->id.dst_ip6, 2297 buf, sizeof(buf)), d->id.dst_port); 2298 } else 2299 bprintf(bp, " UNKNOWN <-> UNKNOWN"); 2300 if (d->kidx != 0) 2301 bprintf(bp, " :%s", object_search_ctlv(fo->tstate, 2302 d->kidx, IPFW_TLV_STATE_NAME)); 2303 2304 #define BOTH_SYN (TH_SYN | (TH_SYN << 8)) 2305 #define BOTH_FIN (TH_FIN | (TH_FIN << 8)) 2306 if (co->verbose) { 2307 bprintf(bp, " state 0x%08x%s", d->state, 2308 d->state ? " ": ","); 2309 if (d->state & IPFW_DYN_ORPHANED) 2310 bprintf(bp, "ORPHANED,"); 2311 if ((d->state & BOTH_SYN) == BOTH_SYN) 2312 bprintf(bp, "BOTH_SYN,"); 2313 else { 2314 if (d->state & TH_SYN) 2315 bprintf(bp, "F_SYN,"); 2316 if (d->state & (TH_SYN << 8)) 2317 bprintf(bp, "R_SYN,"); 2318 } 2319 if ((d->state & BOTH_FIN) == BOTH_FIN) 2320 bprintf(bp, "BOTH_FIN,"); 2321 else { 2322 if (d->state & TH_FIN) 2323 bprintf(bp, "F_FIN,"); 2324 if (d->state & (TH_FIN << 8)) 2325 bprintf(bp, "R_FIN,"); 2326 } 2327 bprintf(bp, " f_ack 0x%x, r_ack 0x%x", d->ack_fwd, 2328 d->ack_rev); 2329 } 2330 } 2331 2332 static int 2333 do_range_cmd(int cmd, ipfw_range_tlv *rt) 2334 { 2335 ipfw_range_header rh; 2336 size_t sz; 2337 2338 memset(&rh, 0, sizeof(rh)); 2339 memcpy(&rh.range, rt, sizeof(*rt)); 2340 rh.range.head.length = sizeof(*rt); 2341 rh.range.head.type = IPFW_TLV_RANGE; 2342 sz = sizeof(rh); 2343 2344 if (do_get3(cmd, &rh.opheader, &sz) != 0) 2345 return (-1); 2346 /* Save number of matched objects */ 2347 rt->new_set = rh.range.new_set; 2348 return (0); 2349 } 2350 2351 /* 2352 * This one handles all set-related commands 2353 * ipfw set { show | enable | disable } 2354 * ipfw set swap X Y 2355 * ipfw set move X to Y 2356 * ipfw set move rule X to Y 2357 */ 2358 void 2359 ipfw_sets_handler(char *av[]) 2360 { 2361 ipfw_range_tlv rt; 2362 char *msg; 2363 size_t size; 2364 uint32_t masks[2]; 2365 int i; 2366 uint16_t rulenum; 2367 uint8_t cmd; 2368 2369 av++; 2370 memset(&rt, 0, sizeof(rt)); 2371 2372 if (av[0] == NULL) 2373 errx(EX_USAGE, "set needs command"); 2374 if (_substrcmp(*av, "show") == 0) { 2375 struct format_opts fo; 2376 ipfw_cfg_lheader *cfg; 2377 2378 memset(&fo, 0, sizeof(fo)); 2379 if (ipfw_get_config(&co, &fo, &cfg, &size) != 0) 2380 err(EX_OSERR, "requesting config failed"); 2381 2382 for (i = 0, msg = "disable"; i < RESVD_SET; i++) 2383 if ((cfg->set_mask & (1<<i)) == 0) { 2384 printf("%s %d", msg, i); 2385 msg = ""; 2386 } 2387 msg = (cfg->set_mask != (uint32_t)-1) ? " enable" : "enable"; 2388 for (i = 0; i < RESVD_SET; i++) 2389 if ((cfg->set_mask & (1<<i)) != 0) { 2390 printf("%s %d", msg, i); 2391 msg = ""; 2392 } 2393 printf("\n"); 2394 free(cfg); 2395 } else if (_substrcmp(*av, "swap") == 0) { 2396 av++; 2397 if ( av[0] == NULL || av[1] == NULL ) 2398 errx(EX_USAGE, "set swap needs 2 set numbers\n"); 2399 rt.set = atoi(av[0]); 2400 rt.new_set = atoi(av[1]); 2401 if (!isdigit(*(av[0])) || rt.set > RESVD_SET) 2402 errx(EX_DATAERR, "invalid set number %s\n", av[0]); 2403 if (!isdigit(*(av[1])) || rt.new_set > RESVD_SET) 2404 errx(EX_DATAERR, "invalid set number %s\n", av[1]); 2405 i = do_range_cmd(IP_FW_SET_SWAP, &rt); 2406 } else if (_substrcmp(*av, "move") == 0) { 2407 av++; 2408 if (av[0] && _substrcmp(*av, "rule") == 0) { 2409 rt.flags = IPFW_RCFLAG_RANGE; /* move rules to new set */ 2410 cmd = IP_FW_XMOVE; 2411 av++; 2412 } else 2413 cmd = IP_FW_SET_MOVE; /* Move set to new one */ 2414 if (av[0] == NULL || av[1] == NULL || av[2] == NULL || 2415 av[3] != NULL || _substrcmp(av[1], "to") != 0) 2416 errx(EX_USAGE, "syntax: set move [rule] X to Y\n"); 2417 rulenum = atoi(av[0]); 2418 rt.new_set = atoi(av[2]); 2419 if (cmd == IP_FW_XMOVE) { 2420 rt.start_rule = rulenum; 2421 rt.end_rule = rulenum; 2422 } else 2423 rt.set = rulenum; 2424 rt.new_set = atoi(av[2]); 2425 if (!isdigit(*(av[0])) || (cmd == 3 && rt.set > RESVD_SET) || 2426 (cmd == 2 && rt.start_rule == IPFW_DEFAULT_RULE) ) 2427 errx(EX_DATAERR, "invalid source number %s\n", av[0]); 2428 if (!isdigit(*(av[2])) || rt.new_set > RESVD_SET) 2429 errx(EX_DATAERR, "invalid dest. set %s\n", av[1]); 2430 i = do_range_cmd(cmd, &rt); 2431 if (i < 0) 2432 err(EX_OSERR, "failed to move %s", 2433 cmd == IP_FW_SET_MOVE ? "set": "rule"); 2434 } else if (_substrcmp(*av, "disable") == 0 || 2435 _substrcmp(*av, "enable") == 0 ) { 2436 int which = _substrcmp(*av, "enable") == 0 ? 1 : 0; 2437 2438 av++; 2439 masks[0] = masks[1] = 0; 2440 2441 while (av[0]) { 2442 if (isdigit(**av)) { 2443 i = atoi(*av); 2444 if (i < 0 || i > RESVD_SET) 2445 errx(EX_DATAERR, 2446 "invalid set number %d\n", i); 2447 masks[which] |= (1<<i); 2448 } else if (_substrcmp(*av, "disable") == 0) 2449 which = 0; 2450 else if (_substrcmp(*av, "enable") == 0) 2451 which = 1; 2452 else 2453 errx(EX_DATAERR, 2454 "invalid set command %s\n", *av); 2455 av++; 2456 } 2457 if ( (masks[0] & masks[1]) != 0 ) 2458 errx(EX_DATAERR, 2459 "cannot enable and disable the same set\n"); 2460 2461 rt.set = masks[0]; 2462 rt.new_set = masks[1]; 2463 i = do_range_cmd(IP_FW_SET_ENABLE, &rt); 2464 if (i) 2465 warn("set enable/disable: setsockopt(IP_FW_SET_ENABLE)"); 2466 } else 2467 errx(EX_USAGE, "invalid set command %s\n", *av); 2468 } 2469 2470 void 2471 ipfw_sysctl_handler(char *av[], int which) 2472 { 2473 av++; 2474 2475 if (av[0] == NULL) { 2476 warnx("missing keyword to enable/disable\n"); 2477 } else if (_substrcmp(*av, "firewall") == 0) { 2478 sysctlbyname("net.inet.ip.fw.enable", NULL, 0, 2479 &which, sizeof(which)); 2480 sysctlbyname("net.inet6.ip6.fw.enable", NULL, 0, 2481 &which, sizeof(which)); 2482 } else if (_substrcmp(*av, "one_pass") == 0) { 2483 sysctlbyname("net.inet.ip.fw.one_pass", NULL, 0, 2484 &which, sizeof(which)); 2485 } else if (_substrcmp(*av, "debug") == 0) { 2486 sysctlbyname("net.inet.ip.fw.debug", NULL, 0, 2487 &which, sizeof(which)); 2488 } else if (_substrcmp(*av, "verbose") == 0) { 2489 sysctlbyname("net.inet.ip.fw.verbose", NULL, 0, 2490 &which, sizeof(which)); 2491 } else if (_substrcmp(*av, "dyn_keepalive") == 0) { 2492 sysctlbyname("net.inet.ip.fw.dyn_keepalive", NULL, 0, 2493 &which, sizeof(which)); 2494 #ifndef NO_ALTQ 2495 } else if (_substrcmp(*av, "altq") == 0) { 2496 altq_set_enabled(which); 2497 #endif 2498 } else { 2499 warnx("unrecognize enable/disable keyword: %s\n", *av); 2500 } 2501 } 2502 2503 typedef void state_cb(struct cmdline_opts *co, struct format_opts *fo, 2504 void *arg, void *state); 2505 2506 static void 2507 prepare_format_dyn(struct cmdline_opts *co, struct format_opts *fo, 2508 void *arg, void *_state) 2509 { 2510 ipfw_dyn_rule *d; 2511 int width; 2512 uint8_t set; 2513 2514 d = (ipfw_dyn_rule *)_state; 2515 /* Count _ALL_ states */ 2516 fo->dcnt++; 2517 2518 if (fo->show_counters == 0) 2519 return; 2520 2521 if (co->use_set) { 2522 /* skip states from another set */ 2523 bcopy((char *)&d->rule + sizeof(uint16_t), &set, 2524 sizeof(uint8_t)); 2525 if (set != co->use_set - 1) 2526 return; 2527 } 2528 2529 width = pr_u64(NULL, &d->pcnt, 0); 2530 if (width > fo->pcwidth) 2531 fo->pcwidth = width; 2532 2533 width = pr_u64(NULL, &d->bcnt, 0); 2534 if (width > fo->bcwidth) 2535 fo->bcwidth = width; 2536 } 2537 2538 static int 2539 foreach_state(struct cmdline_opts *co, struct format_opts *fo, 2540 caddr_t base, size_t sz, state_cb dyn_bc, void *dyn_arg) 2541 { 2542 int ttype; 2543 state_cb *fptr; 2544 void *farg; 2545 ipfw_obj_tlv *tlv; 2546 ipfw_obj_ctlv *ctlv; 2547 2548 fptr = NULL; 2549 ttype = 0; 2550 2551 while (sz > 0) { 2552 ctlv = (ipfw_obj_ctlv *)base; 2553 switch (ctlv->head.type) { 2554 case IPFW_TLV_DYNSTATE_LIST: 2555 base += sizeof(*ctlv); 2556 sz -= sizeof(*ctlv); 2557 ttype = IPFW_TLV_DYN_ENT; 2558 fptr = dyn_bc; 2559 farg = dyn_arg; 2560 break; 2561 default: 2562 return (sz); 2563 } 2564 2565 while (sz > 0) { 2566 tlv = (ipfw_obj_tlv *)base; 2567 if (tlv->type != ttype) 2568 break; 2569 2570 fptr(co, fo, farg, tlv + 1); 2571 sz -= tlv->length; 2572 base += tlv->length; 2573 } 2574 } 2575 2576 return (sz); 2577 } 2578 2579 static void 2580 prepare_format_opts(struct cmdline_opts *co, struct format_opts *fo, 2581 ipfw_obj_tlv *rtlv, int rcnt, caddr_t dynbase, size_t dynsz) 2582 { 2583 int bcwidth, pcwidth, width; 2584 int n; 2585 struct ip_fw_bcounter *cntr; 2586 struct ip_fw_rule *r; 2587 2588 bcwidth = 0; 2589 pcwidth = 0; 2590 if (fo->show_counters != 0) { 2591 for (n = 0; n < rcnt; n++, 2592 rtlv = (ipfw_obj_tlv *)((caddr_t)rtlv + rtlv->length)) { 2593 cntr = (struct ip_fw_bcounter *)(rtlv + 1); 2594 r = (struct ip_fw_rule *)((caddr_t)cntr + cntr->size); 2595 /* skip rules from another set */ 2596 if (co->use_set && r->set != co->use_set - 1) 2597 continue; 2598 2599 /* packet counter */ 2600 width = pr_u64(NULL, &cntr->pcnt, 0); 2601 if (width > pcwidth) 2602 pcwidth = width; 2603 2604 /* byte counter */ 2605 width = pr_u64(NULL, &cntr->bcnt, 0); 2606 if (width > bcwidth) 2607 bcwidth = width; 2608 } 2609 } 2610 fo->bcwidth = bcwidth; 2611 fo->pcwidth = pcwidth; 2612 2613 fo->dcnt = 0; 2614 if (co->do_dynamic && dynsz > 0) 2615 foreach_state(co, fo, dynbase, dynsz, prepare_format_dyn, NULL); 2616 } 2617 2618 static int 2619 list_static_range(struct cmdline_opts *co, struct format_opts *fo, 2620 struct buf_pr *bp, ipfw_obj_tlv *rtlv, int rcnt) 2621 { 2622 int n, seen; 2623 struct ip_fw_rule *r; 2624 struct ip_fw_bcounter *cntr; 2625 int c = 0; 2626 2627 for (n = seen = 0; n < rcnt; n++, 2628 rtlv = (ipfw_obj_tlv *)((caddr_t)rtlv + rtlv->length)) { 2629 2630 if ((fo->show_counters | fo->show_time) != 0) { 2631 cntr = (struct ip_fw_bcounter *)(rtlv + 1); 2632 r = (struct ip_fw_rule *)((caddr_t)cntr + cntr->size); 2633 } else { 2634 cntr = NULL; 2635 r = (struct ip_fw_rule *)(rtlv + 1); 2636 } 2637 if (r->rulenum > fo->last) 2638 break; 2639 if (co->use_set && r->set != co->use_set - 1) 2640 continue; 2641 if (r->rulenum >= fo->first && r->rulenum <= fo->last) { 2642 show_static_rule(co, fo, bp, r, cntr); 2643 printf("%s", bp->buf); 2644 c += rtlv->length; 2645 bp_flush(bp); 2646 seen++; 2647 } 2648 } 2649 2650 return (seen); 2651 } 2652 2653 static void 2654 list_dyn_state(struct cmdline_opts *co, struct format_opts *fo, 2655 void *_arg, void *_state) 2656 { 2657 uint16_t rulenum; 2658 uint8_t set; 2659 ipfw_dyn_rule *d; 2660 struct buf_pr *bp; 2661 2662 d = (ipfw_dyn_rule *)_state; 2663 bp = (struct buf_pr *)_arg; 2664 2665 bcopy(&d->rule, &rulenum, sizeof(rulenum)); 2666 if (rulenum > fo->last) 2667 return; 2668 if (co->use_set) { 2669 bcopy((char *)&d->rule + sizeof(uint16_t), 2670 &set, sizeof(uint8_t)); 2671 if (set != co->use_set - 1) 2672 return; 2673 } 2674 if (rulenum >= fo->first) { 2675 show_dyn_state(co, fo, bp, d); 2676 printf("%s\n", bp->buf); 2677 bp_flush(bp); 2678 } 2679 } 2680 2681 static int 2682 list_dyn_range(struct cmdline_opts *co, struct format_opts *fo, 2683 struct buf_pr *bp, caddr_t base, size_t sz) 2684 { 2685 2686 sz = foreach_state(co, fo, base, sz, list_dyn_state, bp); 2687 return (sz); 2688 } 2689 2690 void 2691 ipfw_list(int ac, char *av[], int show_counters) 2692 { 2693 ipfw_cfg_lheader *cfg; 2694 struct format_opts sfo; 2695 size_t sz; 2696 int error; 2697 int lac; 2698 char **lav; 2699 uint32_t rnum; 2700 char *endptr; 2701 2702 if (co.test_only) { 2703 fprintf(stderr, "Testing only, list disabled\n"); 2704 return; 2705 } 2706 if (co.do_pipe) { 2707 dummynet_list(ac, av, show_counters); 2708 return; 2709 } 2710 2711 ac--; 2712 av++; 2713 memset(&sfo, 0, sizeof(sfo)); 2714 2715 /* Determine rule range to request */ 2716 if (ac > 0) { 2717 for (lac = ac, lav = av; lac != 0; lac--) { 2718 rnum = strtoul(*lav++, &endptr, 10); 2719 if (sfo.first == 0 || rnum < sfo.first) 2720 sfo.first = rnum; 2721 2722 if (*endptr == '-') 2723 rnum = strtoul(endptr + 1, &endptr, 10); 2724 if (sfo.last == 0 || rnum > sfo.last) 2725 sfo.last = rnum; 2726 } 2727 } 2728 2729 /* get configuraion from kernel */ 2730 cfg = NULL; 2731 sfo.show_counters = show_counters; 2732 sfo.show_time = co.do_time; 2733 if (co.do_dynamic != 2) 2734 sfo.flags |= IPFW_CFG_GET_STATIC; 2735 if (co.do_dynamic != 0) 2736 sfo.flags |= IPFW_CFG_GET_STATES; 2737 if ((sfo.show_counters | sfo.show_time) != 0) 2738 sfo.flags |= IPFW_CFG_GET_COUNTERS; 2739 if (ipfw_get_config(&co, &sfo, &cfg, &sz) != 0) 2740 err(EX_OSERR, "retrieving config failed"); 2741 2742 error = ipfw_show_config(&co, &sfo, cfg, sz, ac, av); 2743 2744 free(cfg); 2745 2746 if (error != EX_OK) 2747 exit(error); 2748 } 2749 2750 static int 2751 ipfw_show_config(struct cmdline_opts *co, struct format_opts *fo, 2752 ipfw_cfg_lheader *cfg, size_t sz, int ac, char *av[]) 2753 { 2754 caddr_t dynbase; 2755 size_t dynsz; 2756 int rcnt; 2757 int exitval = EX_OK; 2758 int lac; 2759 char **lav; 2760 char *endptr; 2761 size_t readsz; 2762 struct buf_pr bp; 2763 ipfw_obj_ctlv *ctlv, *tstate; 2764 ipfw_obj_tlv *rbase; 2765 2766 /* 2767 * Handle tablenames TLV first, if any 2768 */ 2769 tstate = NULL; 2770 rbase = NULL; 2771 dynbase = NULL; 2772 dynsz = 0; 2773 readsz = sizeof(*cfg); 2774 rcnt = 0; 2775 2776 fo->set_mask = cfg->set_mask; 2777 2778 ctlv = (ipfw_obj_ctlv *)(cfg + 1); 2779 if (ctlv->head.type == IPFW_TLV_TBLNAME_LIST) { 2780 object_sort_ctlv(ctlv); 2781 fo->tstate = ctlv; 2782 readsz += ctlv->head.length; 2783 ctlv = (ipfw_obj_ctlv *)((caddr_t)ctlv + ctlv->head.length); 2784 } 2785 2786 if (cfg->flags & IPFW_CFG_GET_STATIC) { 2787 /* We've requested static rules */ 2788 if (ctlv->head.type == IPFW_TLV_RULE_LIST) { 2789 rbase = (ipfw_obj_tlv *)(ctlv + 1); 2790 rcnt = ctlv->count; 2791 readsz += ctlv->head.length; 2792 ctlv = (ipfw_obj_ctlv *)((caddr_t)ctlv + 2793 ctlv->head.length); 2794 } 2795 } 2796 2797 if ((cfg->flags & IPFW_CFG_GET_STATES) && (readsz != sz)) { 2798 /* We may have some dynamic states */ 2799 dynsz = sz - readsz; 2800 /* Skip empty header */ 2801 if (dynsz != sizeof(ipfw_obj_ctlv)) 2802 dynbase = (caddr_t)ctlv; 2803 else 2804 dynsz = 0; 2805 } 2806 2807 prepare_format_opts(co, fo, rbase, rcnt, dynbase, dynsz); 2808 bp_alloc(&bp, 4096); 2809 2810 /* if no rule numbers were specified, list all rules */ 2811 if (ac == 0) { 2812 fo->first = 0; 2813 fo->last = IPFW_DEFAULT_RULE; 2814 if (cfg->flags & IPFW_CFG_GET_STATIC) 2815 list_static_range(co, fo, &bp, rbase, rcnt); 2816 2817 if (co->do_dynamic && dynsz > 0) { 2818 printf("## Dynamic rules (%d %zu):\n", fo->dcnt, 2819 dynsz); 2820 list_dyn_range(co, fo, &bp, dynbase, dynsz); 2821 } 2822 2823 bp_free(&bp); 2824 return (EX_OK); 2825 } 2826 2827 /* display specific rules requested on command line */ 2828 for (lac = ac, lav = av; lac != 0; lac--) { 2829 /* convert command line rule # */ 2830 fo->last = fo->first = strtoul(*lav++, &endptr, 10); 2831 if (*endptr == '-') 2832 fo->last = strtoul(endptr + 1, &endptr, 10); 2833 if (*endptr) { 2834 exitval = EX_USAGE; 2835 warnx("invalid rule number: %s", *(lav - 1)); 2836 continue; 2837 } 2838 2839 if ((cfg->flags & IPFW_CFG_GET_STATIC) == 0) 2840 continue; 2841 2842 if (list_static_range(co, fo, &bp, rbase, rcnt) == 0) { 2843 /* give precedence to other error(s) */ 2844 if (exitval == EX_OK) 2845 exitval = EX_UNAVAILABLE; 2846 if (fo->first == fo->last) 2847 warnx("rule %u does not exist", fo->first); 2848 else 2849 warnx("no rules in range %u-%u", 2850 fo->first, fo->last); 2851 } 2852 } 2853 2854 if (co->do_dynamic && dynsz > 0) { 2855 printf("## Dynamic rules:\n"); 2856 for (lac = ac, lav = av; lac != 0; lac--) { 2857 fo->last = fo->first = strtoul(*lav++, &endptr, 10); 2858 if (*endptr == '-') 2859 fo->last = strtoul(endptr+1, &endptr, 10); 2860 if (*endptr) 2861 /* already warned */ 2862 continue; 2863 list_dyn_range(co, fo, &bp, dynbase, dynsz); 2864 } 2865 } 2866 2867 bp_free(&bp); 2868 return (exitval); 2869 } 2870 2871 2872 /* 2873 * Retrieves current ipfw configuration of given type 2874 * and stores its pointer to @pcfg. 2875 * 2876 * Caller is responsible for freeing @pcfg. 2877 * 2878 * Returns 0 on success. 2879 */ 2880 2881 static int 2882 ipfw_get_config(struct cmdline_opts *co, struct format_opts *fo, 2883 ipfw_cfg_lheader **pcfg, size_t *psize) 2884 { 2885 ipfw_cfg_lheader *cfg; 2886 size_t sz; 2887 int i; 2888 2889 2890 if (co->test_only != 0) { 2891 fprintf(stderr, "Testing only, list disabled\n"); 2892 return (0); 2893 } 2894 2895 /* Start with some data size */ 2896 sz = 4096; 2897 cfg = NULL; 2898 2899 for (i = 0; i < 16; i++) { 2900 if (cfg != NULL) 2901 free(cfg); 2902 if ((cfg = calloc(1, sz)) == NULL) 2903 return (ENOMEM); 2904 2905 cfg->flags = fo->flags; 2906 cfg->start_rule = fo->first; 2907 cfg->end_rule = fo->last; 2908 2909 if (do_get3(IP_FW_XGET, &cfg->opheader, &sz) != 0) { 2910 if (errno != ENOMEM) { 2911 free(cfg); 2912 return (errno); 2913 } 2914 2915 /* Buffer size is not enough. Try to increase */ 2916 sz = sz * 2; 2917 if (sz < cfg->size) 2918 sz = cfg->size; 2919 continue; 2920 } 2921 2922 *pcfg = cfg; 2923 *psize = sz; 2924 return (0); 2925 } 2926 2927 free(cfg); 2928 return (ENOMEM); 2929 } 2930 2931 static int 2932 lookup_host (char *host, struct in_addr *ipaddr) 2933 { 2934 struct hostent *he; 2935 2936 if (!inet_aton(host, ipaddr)) { 2937 if ((he = gethostbyname(host)) == NULL) 2938 return(-1); 2939 *ipaddr = *(struct in_addr *)he->h_addr_list[0]; 2940 } 2941 return(0); 2942 } 2943 2944 struct tidx { 2945 ipfw_obj_ntlv *idx; 2946 uint32_t count; 2947 uint32_t size; 2948 uint16_t counter; 2949 uint8_t set; 2950 }; 2951 2952 int 2953 ipfw_check_object_name(const char *name) 2954 { 2955 int c, i, l; 2956 2957 /* 2958 * Check that name is null-terminated and contains 2959 * valid symbols only. Valid mask is: 2960 * [a-zA-Z0-9\-_\.]{1,63} 2961 */ 2962 l = strlen(name); 2963 if (l == 0 || l >= 64) 2964 return (EINVAL); 2965 for (i = 0; i < l; i++) { 2966 c = name[i]; 2967 if (isalpha(c) || isdigit(c) || c == '_' || 2968 c == '-' || c == '.') 2969 continue; 2970 return (EINVAL); 2971 } 2972 return (0); 2973 } 2974 2975 static char *default_state_name = "default"; 2976 static int 2977 state_check_name(const char *name) 2978 { 2979 2980 if (ipfw_check_object_name(name) != 0) 2981 return (EINVAL); 2982 if (strcmp(name, "any") == 0) 2983 return (EINVAL); 2984 return (0); 2985 } 2986 2987 static int 2988 eaction_check_name(const char *name) 2989 { 2990 2991 if (ipfw_check_object_name(name) != 0) 2992 return (EINVAL); 2993 /* Restrict some 'special' names */ 2994 if (match_token(rule_actions, name) != -1 && 2995 match_token(rule_action_params, name) != -1) 2996 return (EINVAL); 2997 return (0); 2998 } 2999 3000 static uint16_t 3001 pack_object(struct tidx *tstate, char *name, int otype) 3002 { 3003 int i; 3004 ipfw_obj_ntlv *ntlv; 3005 3006 for (i = 0; i < tstate->count; i++) { 3007 if (strcmp(tstate->idx[i].name, name) != 0) 3008 continue; 3009 if (tstate->idx[i].set != tstate->set) 3010 continue; 3011 if (tstate->idx[i].head.type != otype) 3012 continue; 3013 3014 return (tstate->idx[i].idx); 3015 } 3016 3017 if (tstate->count + 1 > tstate->size) { 3018 tstate->size += 4; 3019 tstate->idx = realloc(tstate->idx, tstate->size * 3020 sizeof(ipfw_obj_ntlv)); 3021 if (tstate->idx == NULL) 3022 return (0); 3023 } 3024 3025 ntlv = &tstate->idx[i]; 3026 memset(ntlv, 0, sizeof(ipfw_obj_ntlv)); 3027 strlcpy(ntlv->name, name, sizeof(ntlv->name)); 3028 ntlv->head.type = otype; 3029 ntlv->head.length = sizeof(ipfw_obj_ntlv); 3030 ntlv->set = tstate->set; 3031 ntlv->idx = ++tstate->counter; 3032 tstate->count++; 3033 3034 return (ntlv->idx); 3035 } 3036 3037 static uint16_t 3038 pack_table(struct tidx *tstate, char *name) 3039 { 3040 3041 if (table_check_name(name) != 0) 3042 return (0); 3043 3044 return (pack_object(tstate, name, IPFW_TLV_TBL_NAME)); 3045 } 3046 3047 void 3048 fill_table(struct _ipfw_insn *cmd, char *av, uint8_t opcode, 3049 struct tidx *tstate) 3050 { 3051 uint32_t *d = ((ipfw_insn_u32 *)cmd)->d; 3052 uint16_t uidx; 3053 char *p; 3054 3055 if ((p = strchr(av + 6, ')')) == NULL) 3056 errx(EX_DATAERR, "forgotten parenthesis: '%s'", av); 3057 *p = '\0'; 3058 p = strchr(av + 6, ','); 3059 if (p) 3060 *p++ = '\0'; 3061 3062 if ((uidx = pack_table(tstate, av + 6)) == 0) 3063 errx(EX_DATAERR, "Invalid table name: %s", av + 6); 3064 3065 cmd->opcode = opcode; 3066 cmd->arg1 = uidx; 3067 if (p) { 3068 cmd->len |= F_INSN_SIZE(ipfw_insn_u32); 3069 d[0] = strtoul(p, NULL, 0); 3070 } else 3071 cmd->len |= F_INSN_SIZE(ipfw_insn); 3072 } 3073 3074 3075 /* 3076 * fills the addr and mask fields in the instruction as appropriate from av. 3077 * Update length as appropriate. 3078 * The following formats are allowed: 3079 * me returns O_IP_*_ME 3080 * 1.2.3.4 single IP address 3081 * 1.2.3.4:5.6.7.8 address:mask 3082 * 1.2.3.4/24 address/mask 3083 * 1.2.3.4/26{1,6,5,4,23} set of addresses in a subnet 3084 * We can have multiple comma-separated address/mask entries. 3085 */ 3086 static void 3087 fill_ip(ipfw_insn_ip *cmd, char *av, int cblen, struct tidx *tstate) 3088 { 3089 int len = 0; 3090 uint32_t *d = ((ipfw_insn_u32 *)cmd)->d; 3091 3092 cmd->o.len &= ~F_LEN_MASK; /* zero len */ 3093 3094 if (_substrcmp(av, "any") == 0) 3095 return; 3096 3097 if (_substrcmp(av, "me") == 0) { 3098 cmd->o.len |= F_INSN_SIZE(ipfw_insn); 3099 return; 3100 } 3101 3102 if (strncmp(av, "table(", 6) == 0) { 3103 fill_table(&cmd->o, av, O_IP_DST_LOOKUP, tstate); 3104 return; 3105 } 3106 3107 while (av) { 3108 /* 3109 * After the address we can have '/' or ':' indicating a mask, 3110 * ',' indicating another address follows, '{' indicating a 3111 * set of addresses of unspecified size. 3112 */ 3113 char *t = NULL, *p = strpbrk(av, "/:,{"); 3114 int masklen; 3115 char md, nd = '\0'; 3116 3117 CHECK_LENGTH(cblen, F_INSN_SIZE(ipfw_insn) + 2 + len); 3118 3119 if (p) { 3120 md = *p; 3121 *p++ = '\0'; 3122 if ((t = strpbrk(p, ",{")) != NULL) { 3123 nd = *t; 3124 *t = '\0'; 3125 } 3126 } else 3127 md = '\0'; 3128 3129 if (lookup_host(av, (struct in_addr *)&d[0]) != 0) 3130 errx(EX_NOHOST, "hostname ``%s'' unknown", av); 3131 switch (md) { 3132 case ':': 3133 if (!inet_aton(p, (struct in_addr *)&d[1])) 3134 errx(EX_DATAERR, "bad netmask ``%s''", p); 3135 break; 3136 case '/': 3137 masklen = atoi(p); 3138 if (masklen == 0) 3139 d[1] = htonl(0U); /* mask */ 3140 else if (masklen > 32) 3141 errx(EX_DATAERR, "bad width ``%s''", p); 3142 else 3143 d[1] = htonl(~0U << (32 - masklen)); 3144 break; 3145 case '{': /* no mask, assume /24 and put back the '{' */ 3146 d[1] = htonl(~0U << (32 - 24)); 3147 *(--p) = md; 3148 break; 3149 3150 case ',': /* single address plus continuation */ 3151 *(--p) = md; 3152 /* FALLTHROUGH */ 3153 case 0: /* initialization value */ 3154 default: 3155 d[1] = htonl(~0U); /* force /32 */ 3156 break; 3157 } 3158 d[0] &= d[1]; /* mask base address with mask */ 3159 if (t) 3160 *t = nd; 3161 /* find next separator */ 3162 if (p) 3163 p = strpbrk(p, ",{"); 3164 if (p && *p == '{') { 3165 /* 3166 * We have a set of addresses. They are stored as follows: 3167 * arg1 is the set size (powers of 2, 2..256) 3168 * addr is the base address IN HOST FORMAT 3169 * mask.. is an array of arg1 bits (rounded up to 3170 * the next multiple of 32) with bits set 3171 * for each host in the map. 3172 */ 3173 uint32_t *map = (uint32_t *)&cmd->mask; 3174 int low, high; 3175 int i = contigmask((uint8_t *)&(d[1]), 32); 3176 3177 if (len > 0) 3178 errx(EX_DATAERR, "address set cannot be in a list"); 3179 if (i < 24 || i > 31) 3180 errx(EX_DATAERR, "invalid set with mask %d\n", i); 3181 cmd->o.arg1 = 1<<(32-i); /* map length */ 3182 d[0] = ntohl(d[0]); /* base addr in host format */ 3183 cmd->o.opcode = O_IP_DST_SET; /* default */ 3184 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32) + (cmd->o.arg1+31)/32; 3185 for (i = 0; i < (cmd->o.arg1+31)/32 ; i++) 3186 map[i] = 0; /* clear map */ 3187 3188 av = p + 1; 3189 low = d[0] & 0xff; 3190 high = low + cmd->o.arg1 - 1; 3191 /* 3192 * Here, i stores the previous value when we specify a range 3193 * of addresses within a mask, e.g. 45-63. i = -1 means we 3194 * have no previous value. 3195 */ 3196 i = -1; /* previous value in a range */ 3197 while (isdigit(*av)) { 3198 char *s; 3199 int a = strtol(av, &s, 0); 3200 3201 if (s == av) { /* no parameter */ 3202 if (*av != '}') 3203 errx(EX_DATAERR, "set not closed\n"); 3204 if (i != -1) 3205 errx(EX_DATAERR, "incomplete range %d-", i); 3206 break; 3207 } 3208 if (a < low || a > high) 3209 errx(EX_DATAERR, "addr %d out of range [%d-%d]\n", 3210 a, low, high); 3211 a -= low; 3212 if (i == -1) /* no previous in range */ 3213 i = a; 3214 else { /* check that range is valid */ 3215 if (i > a) 3216 errx(EX_DATAERR, "invalid range %d-%d", 3217 i+low, a+low); 3218 if (*s == '-') 3219 errx(EX_DATAERR, "double '-' in range"); 3220 } 3221 for (; i <= a; i++) 3222 map[i/32] |= 1<<(i & 31); 3223 i = -1; 3224 if (*s == '-') 3225 i = a; 3226 else if (*s == '}') 3227 break; 3228 av = s+1; 3229 } 3230 return; 3231 } 3232 av = p; 3233 if (av) /* then *av must be a ',' */ 3234 av++; 3235 3236 /* Check this entry */ 3237 if (d[1] == 0) { /* "any", specified as x.x.x.x/0 */ 3238 /* 3239 * 'any' turns the entire list into a NOP. 3240 * 'not any' never matches, so it is removed from the 3241 * list unless it is the only item, in which case we 3242 * report an error. 3243 */ 3244 if (cmd->o.len & F_NOT) { /* "not any" never matches */ 3245 if (av == NULL && len == 0) /* only this entry */ 3246 errx(EX_DATAERR, "not any never matches"); 3247 } 3248 /* else do nothing and skip this entry */ 3249 return; 3250 } 3251 /* A single IP can be stored in an optimized format */ 3252 if (d[1] == (uint32_t)~0 && av == NULL && len == 0) { 3253 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32); 3254 return; 3255 } 3256 len += 2; /* two words... */ 3257 d += 2; 3258 } /* end while */ 3259 if (len + 1 > F_LEN_MASK) 3260 errx(EX_DATAERR, "address list too long"); 3261 cmd->o.len |= len+1; 3262 } 3263 3264 3265 /* n2mask sets n bits of the mask */ 3266 void 3267 n2mask(struct in6_addr *mask, int n) 3268 { 3269 static int minimask[9] = 3270 { 0x00, 0x80, 0xc0, 0xe0, 0xf0, 0xf8, 0xfc, 0xfe, 0xff }; 3271 u_char *p; 3272 3273 memset(mask, 0, sizeof(struct in6_addr)); 3274 p = (u_char *) mask; 3275 for (; n > 0; p++, n -= 8) { 3276 if (n >= 8) 3277 *p = 0xff; 3278 else 3279 *p = minimask[n]; 3280 } 3281 return; 3282 } 3283 3284 static void 3285 fill_flags_cmd(ipfw_insn *cmd, enum ipfw_opcodes opcode, 3286 struct _s_x *flags, char *p) 3287 { 3288 char *e; 3289 uint32_t set = 0, clear = 0; 3290 3291 if (fill_flags(flags, p, &e, &set, &clear) != 0) 3292 errx(EX_DATAERR, "invalid flag %s", e); 3293 3294 cmd->opcode = opcode; 3295 cmd->len = (cmd->len & (F_NOT | F_OR)) | 1; 3296 cmd->arg1 = (set & 0xff) | ( (clear & 0xff) << 8); 3297 } 3298 3299 3300 void 3301 ipfw_delete(char *av[]) 3302 { 3303 ipfw_range_tlv rt; 3304 char *sep; 3305 int i, j; 3306 int exitval = EX_OK; 3307 int do_set = 0; 3308 3309 av++; 3310 NEED1("missing rule specification"); 3311 if ( *av && _substrcmp(*av, "set") == 0) { 3312 /* Do not allow using the following syntax: 3313 * ipfw set N delete set M 3314 */ 3315 if (co.use_set) 3316 errx(EX_DATAERR, "invalid syntax"); 3317 do_set = 1; /* delete set */ 3318 av++; 3319 } 3320 3321 /* Rule number */ 3322 while (*av && isdigit(**av)) { 3323 i = strtol(*av, &sep, 10); 3324 j = i; 3325 if (*sep== '-') 3326 j = strtol(sep + 1, NULL, 10); 3327 av++; 3328 if (co.do_nat) { 3329 exitval = do_cmd(IP_FW_NAT_DEL, &i, sizeof i); 3330 if (exitval) { 3331 exitval = EX_UNAVAILABLE; 3332 if (co.do_quiet) 3333 continue; 3334 warn("nat %u not available", i); 3335 } 3336 } else if (co.do_pipe) { 3337 exitval = ipfw_delete_pipe(co.do_pipe, i); 3338 } else { 3339 memset(&rt, 0, sizeof(rt)); 3340 if (do_set != 0) { 3341 rt.set = i & 31; 3342 rt.flags = IPFW_RCFLAG_SET; 3343 } else { 3344 rt.start_rule = i & 0xffff; 3345 rt.end_rule = j & 0xffff; 3346 if (rt.start_rule == 0 && rt.end_rule == 0) 3347 rt.flags |= IPFW_RCFLAG_ALL; 3348 else 3349 rt.flags |= IPFW_RCFLAG_RANGE; 3350 if (co.use_set != 0) { 3351 rt.set = co.use_set - 1; 3352 rt.flags |= IPFW_RCFLAG_SET; 3353 } 3354 } 3355 if (co.do_dynamic == 2) 3356 rt.flags |= IPFW_RCFLAG_DYNAMIC; 3357 i = do_range_cmd(IP_FW_XDEL, &rt); 3358 if (i != 0) { 3359 exitval = EX_UNAVAILABLE; 3360 if (co.do_quiet) 3361 continue; 3362 warn("rule %u: setsockopt(IP_FW_XDEL)", 3363 rt.start_rule); 3364 } else if (rt.new_set == 0 && do_set == 0 && 3365 co.do_dynamic != 2) { 3366 exitval = EX_UNAVAILABLE; 3367 if (co.do_quiet) 3368 continue; 3369 if (rt.start_rule != rt.end_rule) 3370 warnx("no rules rules in %u-%u range", 3371 rt.start_rule, rt.end_rule); 3372 else 3373 warnx("rule %u not found", 3374 rt.start_rule); 3375 } 3376 } 3377 } 3378 if (exitval != EX_OK && co.do_force == 0) 3379 exit(exitval); 3380 } 3381 3382 3383 /* 3384 * fill the interface structure. We do not check the name as we can 3385 * create interfaces dynamically, so checking them at insert time 3386 * makes relatively little sense. 3387 * Interface names containing '*', '?', or '[' are assumed to be shell 3388 * patterns which match interfaces. 3389 */ 3390 static void 3391 fill_iface(ipfw_insn_if *cmd, char *arg, int cblen, struct tidx *tstate) 3392 { 3393 char *p; 3394 uint16_t uidx; 3395 3396 cmd->name[0] = '\0'; 3397 cmd->o.len |= F_INSN_SIZE(ipfw_insn_if); 3398 3399 CHECK_CMDLEN; 3400 3401 /* Parse the interface or address */ 3402 if (strcmp(arg, "any") == 0) 3403 cmd->o.len = 0; /* effectively ignore this command */ 3404 else if (strncmp(arg, "table(", 6) == 0) { 3405 if ((p = strchr(arg + 6, ')')) == NULL) 3406 errx(EX_DATAERR, "forgotten parenthesis: '%s'", arg); 3407 *p = '\0'; 3408 p = strchr(arg + 6, ','); 3409 if (p) 3410 *p++ = '\0'; 3411 if ((uidx = pack_table(tstate, arg + 6)) == 0) 3412 errx(EX_DATAERR, "Invalid table name: %s", arg + 6); 3413 3414 cmd->name[0] = '\1'; /* Special value indicating table */ 3415 cmd->p.kidx = uidx; 3416 } else if (!isdigit(*arg)) { 3417 strlcpy(cmd->name, arg, sizeof(cmd->name)); 3418 cmd->p.glob = strpbrk(arg, "*?[") != NULL ? 1 : 0; 3419 } else if (!inet_aton(arg, &cmd->p.ip)) 3420 errx(EX_DATAERR, "bad ip address ``%s''", arg); 3421 } 3422 3423 static void 3424 get_mac_addr_mask(const char *p, uint8_t *addr, uint8_t *mask) 3425 { 3426 int i; 3427 size_t l; 3428 char *ap, *ptr, *optr; 3429 struct ether_addr *mac; 3430 const char *macset = "0123456789abcdefABCDEF:"; 3431 3432 if (strcmp(p, "any") == 0) { 3433 for (i = 0; i < ETHER_ADDR_LEN; i++) 3434 addr[i] = mask[i] = 0; 3435 return; 3436 } 3437 3438 optr = ptr = strdup(p); 3439 if ((ap = strsep(&ptr, "&/")) != NULL && *ap != 0) { 3440 l = strlen(ap); 3441 if (strspn(ap, macset) != l || (mac = ether_aton(ap)) == NULL) 3442 errx(EX_DATAERR, "Incorrect MAC address"); 3443 bcopy(mac, addr, ETHER_ADDR_LEN); 3444 } else 3445 errx(EX_DATAERR, "Incorrect MAC address"); 3446 3447 if (ptr != NULL) { /* we have mask? */ 3448 if (p[ptr - optr - 1] == '/') { /* mask len */ 3449 long ml = strtol(ptr, &ap, 10); 3450 if (*ap != 0 || ml > ETHER_ADDR_LEN * 8 || ml < 0) 3451 errx(EX_DATAERR, "Incorrect mask length"); 3452 for (i = 0; ml > 0 && i < ETHER_ADDR_LEN; ml -= 8, i++) 3453 mask[i] = (ml >= 8) ? 0xff: (~0) << (8 - ml); 3454 } else { /* mask */ 3455 l = strlen(ptr); 3456 if (strspn(ptr, macset) != l || 3457 (mac = ether_aton(ptr)) == NULL) 3458 errx(EX_DATAERR, "Incorrect mask"); 3459 bcopy(mac, mask, ETHER_ADDR_LEN); 3460 } 3461 } else { /* default mask: ff:ff:ff:ff:ff:ff */ 3462 for (i = 0; i < ETHER_ADDR_LEN; i++) 3463 mask[i] = 0xff; 3464 } 3465 for (i = 0; i < ETHER_ADDR_LEN; i++) 3466 addr[i] &= mask[i]; 3467 3468 free(optr); 3469 } 3470 3471 /* 3472 * helper function, updates the pointer to cmd with the length 3473 * of the current command, and also cleans up the first word of 3474 * the new command in case it has been clobbered before. 3475 */ 3476 static ipfw_insn * 3477 next_cmd(ipfw_insn *cmd, int *len) 3478 { 3479 *len -= F_LEN(cmd); 3480 CHECK_LENGTH(*len, 0); 3481 cmd += F_LEN(cmd); 3482 bzero(cmd, sizeof(*cmd)); 3483 return cmd; 3484 } 3485 3486 /* 3487 * Takes arguments and copies them into a comment 3488 */ 3489 static void 3490 fill_comment(ipfw_insn *cmd, char **av, int cblen) 3491 { 3492 int i, l; 3493 char *p = (char *)(cmd + 1); 3494 3495 cmd->opcode = O_NOP; 3496 cmd->len = (cmd->len & (F_NOT | F_OR)); 3497 3498 /* Compute length of comment string. */ 3499 for (i = 0, l = 0; av[i] != NULL; i++) 3500 l += strlen(av[i]) + 1; 3501 if (l == 0) 3502 return; 3503 if (l > 84) 3504 errx(EX_DATAERR, 3505 "comment too long (max 80 chars)"); 3506 l = 1 + (l+3)/4; 3507 cmd->len = (cmd->len & (F_NOT | F_OR)) | l; 3508 CHECK_CMDLEN; 3509 3510 for (i = 0; av[i] != NULL; i++) { 3511 strcpy(p, av[i]); 3512 p += strlen(av[i]); 3513 *p++ = ' '; 3514 } 3515 *(--p) = '\0'; 3516 } 3517 3518 /* 3519 * A function to fill simple commands of size 1. 3520 * Existing flags are preserved. 3521 */ 3522 static void 3523 fill_cmd(ipfw_insn *cmd, enum ipfw_opcodes opcode, int flags, uint16_t arg) 3524 { 3525 cmd->opcode = opcode; 3526 cmd->len = ((cmd->len | flags) & (F_NOT | F_OR)) | 1; 3527 cmd->arg1 = arg; 3528 } 3529 3530 /* 3531 * Fetch and add the MAC address and type, with masks. This generates one or 3532 * two microinstructions, and returns the pointer to the last one. 3533 */ 3534 static ipfw_insn * 3535 add_mac(ipfw_insn *cmd, char *av[], int cblen) 3536 { 3537 ipfw_insn_mac *mac; 3538 3539 if ( ( av[0] == NULL ) || ( av[1] == NULL ) ) 3540 errx(EX_DATAERR, "MAC dst src"); 3541 3542 cmd->opcode = O_MACADDR2; 3543 cmd->len = (cmd->len & (F_NOT | F_OR)) | F_INSN_SIZE(ipfw_insn_mac); 3544 CHECK_CMDLEN; 3545 3546 mac = (ipfw_insn_mac *)cmd; 3547 get_mac_addr_mask(av[0], mac->addr, mac->mask); /* dst */ 3548 get_mac_addr_mask(av[1], &(mac->addr[ETHER_ADDR_LEN]), 3549 &(mac->mask[ETHER_ADDR_LEN])); /* src */ 3550 return cmd; 3551 } 3552 3553 static ipfw_insn * 3554 add_mactype(ipfw_insn *cmd, char *av, int cblen) 3555 { 3556 if (!av) 3557 errx(EX_DATAERR, "missing MAC type"); 3558 if (strcmp(av, "any") != 0) { /* we have a non-null type */ 3559 fill_newports((ipfw_insn_u16 *)cmd, av, IPPROTO_ETHERTYPE, 3560 cblen); 3561 cmd->opcode = O_MAC_TYPE; 3562 return cmd; 3563 } else 3564 return NULL; 3565 } 3566 3567 static ipfw_insn * 3568 add_proto0(ipfw_insn *cmd, char *av, u_char *protop) 3569 { 3570 struct protoent *pe; 3571 char *ep; 3572 int proto; 3573 3574 proto = strtol(av, &ep, 10); 3575 if (*ep != '\0' || proto <= 0) { 3576 if ((pe = getprotobyname(av)) == NULL) 3577 return NULL; 3578 proto = pe->p_proto; 3579 } 3580 3581 fill_cmd(cmd, O_PROTO, 0, proto); 3582 *protop = proto; 3583 return cmd; 3584 } 3585 3586 static ipfw_insn * 3587 add_proto(ipfw_insn *cmd, char *av, u_char *protop) 3588 { 3589 u_char proto = IPPROTO_IP; 3590 3591 if (_substrcmp(av, "all") == 0 || strcmp(av, "ip") == 0) 3592 ; /* do not set O_IP4 nor O_IP6 */ 3593 else if (strcmp(av, "ip4") == 0) 3594 /* explicit "just IPv4" rule */ 3595 fill_cmd(cmd, O_IP4, 0, 0); 3596 else if (strcmp(av, "ip6") == 0) { 3597 /* explicit "just IPv6" rule */ 3598 proto = IPPROTO_IPV6; 3599 fill_cmd(cmd, O_IP6, 0, 0); 3600 } else 3601 return add_proto0(cmd, av, protop); 3602 3603 *protop = proto; 3604 return cmd; 3605 } 3606 3607 static ipfw_insn * 3608 add_proto_compat(ipfw_insn *cmd, char *av, u_char *protop) 3609 { 3610 u_char proto = IPPROTO_IP; 3611 3612 if (_substrcmp(av, "all") == 0 || strcmp(av, "ip") == 0) 3613 ; /* do not set O_IP4 nor O_IP6 */ 3614 else if (strcmp(av, "ipv4") == 0 || strcmp(av, "ip4") == 0) 3615 /* explicit "just IPv4" rule */ 3616 fill_cmd(cmd, O_IP4, 0, 0); 3617 else if (strcmp(av, "ipv6") == 0 || strcmp(av, "ip6") == 0) { 3618 /* explicit "just IPv6" rule */ 3619 proto = IPPROTO_IPV6; 3620 fill_cmd(cmd, O_IP6, 0, 0); 3621 } else 3622 return add_proto0(cmd, av, protop); 3623 3624 *protop = proto; 3625 return cmd; 3626 } 3627 3628 static ipfw_insn * 3629 add_srcip(ipfw_insn *cmd, char *av, int cblen, struct tidx *tstate) 3630 { 3631 fill_ip((ipfw_insn_ip *)cmd, av, cblen, tstate); 3632 if (cmd->opcode == O_IP_DST_SET) /* set */ 3633 cmd->opcode = O_IP_SRC_SET; 3634 else if (cmd->opcode == O_IP_DST_LOOKUP) /* table */ 3635 cmd->opcode = O_IP_SRC_LOOKUP; 3636 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn)) /* me */ 3637 cmd->opcode = O_IP_SRC_ME; 3638 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_u32)) /* one IP */ 3639 cmd->opcode = O_IP_SRC; 3640 else /* addr/mask */ 3641 cmd->opcode = O_IP_SRC_MASK; 3642 return cmd; 3643 } 3644 3645 static ipfw_insn * 3646 add_dstip(ipfw_insn *cmd, char *av, int cblen, struct tidx *tstate) 3647 { 3648 fill_ip((ipfw_insn_ip *)cmd, av, cblen, tstate); 3649 if (cmd->opcode == O_IP_DST_SET) /* set */ 3650 ; 3651 else if (cmd->opcode == O_IP_DST_LOOKUP) /* table */ 3652 ; 3653 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn)) /* me */ 3654 cmd->opcode = O_IP_DST_ME; 3655 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_u32)) /* one IP */ 3656 cmd->opcode = O_IP_DST; 3657 else /* addr/mask */ 3658 cmd->opcode = O_IP_DST_MASK; 3659 return cmd; 3660 } 3661 3662 static struct _s_x f_reserved_keywords[] = { 3663 { "altq", TOK_OR }, 3664 { "//", TOK_OR }, 3665 { "diverted", TOK_OR }, 3666 { "dst-port", TOK_OR }, 3667 { "src-port", TOK_OR }, 3668 { "established", TOK_OR }, 3669 { "keep-state", TOK_OR }, 3670 { "frag", TOK_OR }, 3671 { "icmptypes", TOK_OR }, 3672 { "in", TOK_OR }, 3673 { "out", TOK_OR }, 3674 { "ip6", TOK_OR }, 3675 { "any", TOK_OR }, 3676 { "to", TOK_OR }, 3677 { "via", TOK_OR }, 3678 { "{", TOK_OR }, 3679 { NULL, 0 } /* terminator */ 3680 }; 3681 3682 static ipfw_insn * 3683 add_ports(ipfw_insn *cmd, char *av, u_char proto, int opcode, int cblen) 3684 { 3685 3686 if (match_token(f_reserved_keywords, av) != -1) 3687 return (NULL); 3688 3689 if (fill_newports((ipfw_insn_u16 *)cmd, av, proto, cblen)) { 3690 /* XXX todo: check that we have a protocol with ports */ 3691 cmd->opcode = opcode; 3692 return cmd; 3693 } 3694 return NULL; 3695 } 3696 3697 static ipfw_insn * 3698 add_src(ipfw_insn *cmd, char *av, u_char proto, int cblen, struct tidx *tstate) 3699 { 3700 struct in6_addr a; 3701 char *host, *ch, buf[INET6_ADDRSTRLEN]; 3702 ipfw_insn *ret = NULL; 3703 int len; 3704 3705 /* Copy first address in set if needed */ 3706 if ((ch = strpbrk(av, "/,")) != NULL) { 3707 len = ch - av; 3708 strlcpy(buf, av, sizeof(buf)); 3709 if (len < sizeof(buf)) 3710 buf[len] = '\0'; 3711 host = buf; 3712 } else 3713 host = av; 3714 3715 if (proto == IPPROTO_IPV6 || strcmp(av, "me6") == 0 || 3716 inet_pton(AF_INET6, host, &a) == 1) 3717 ret = add_srcip6(cmd, av, cblen, tstate); 3718 /* XXX: should check for IPv4, not !IPv6 */ 3719 if (ret == NULL && (proto == IPPROTO_IP || strcmp(av, "me") == 0 || 3720 inet_pton(AF_INET6, host, &a) != 1)) 3721 ret = add_srcip(cmd, av, cblen, tstate); 3722 if (ret == NULL && strcmp(av, "any") != 0) 3723 ret = cmd; 3724 3725 return ret; 3726 } 3727 3728 static ipfw_insn * 3729 add_dst(ipfw_insn *cmd, char *av, u_char proto, int cblen, struct tidx *tstate) 3730 { 3731 struct in6_addr a; 3732 char *host, *ch, buf[INET6_ADDRSTRLEN]; 3733 ipfw_insn *ret = NULL; 3734 int len; 3735 3736 /* Copy first address in set if needed */ 3737 if ((ch = strpbrk(av, "/,")) != NULL) { 3738 len = ch - av; 3739 strlcpy(buf, av, sizeof(buf)); 3740 if (len < sizeof(buf)) 3741 buf[len] = '\0'; 3742 host = buf; 3743 } else 3744 host = av; 3745 3746 if (proto == IPPROTO_IPV6 || strcmp(av, "me6") == 0 || 3747 inet_pton(AF_INET6, host, &a) == 1) 3748 ret = add_dstip6(cmd, av, cblen, tstate); 3749 /* XXX: should check for IPv4, not !IPv6 */ 3750 if (ret == NULL && (proto == IPPROTO_IP || strcmp(av, "me") == 0 || 3751 inet_pton(AF_INET6, host, &a) != 1)) 3752 ret = add_dstip(cmd, av, cblen, tstate); 3753 if (ret == NULL && strcmp(av, "any") != 0) 3754 ret = cmd; 3755 3756 return ret; 3757 } 3758 3759 /* 3760 * Parse arguments and assemble the microinstructions which make up a rule. 3761 * Rules are added into the 'rulebuf' and then copied in the correct order 3762 * into the actual rule. 3763 * 3764 * The syntax for a rule starts with the action, followed by 3765 * optional action parameters, and the various match patterns. 3766 * In the assembled microcode, the first opcode must be an O_PROBE_STATE 3767 * (generated if the rule includes a keep-state option), then the 3768 * various match patterns, log/altq actions, and the actual action. 3769 * 3770 */ 3771 void 3772 compile_rule(char *av[], uint32_t *rbuf, int *rbufsize, struct tidx *tstate) 3773 { 3774 /* 3775 * rules are added into the 'rulebuf' and then copied in 3776 * the correct order into the actual rule. 3777 * Some things that need to go out of order (prob, action etc.) 3778 * go into actbuf[]. 3779 */ 3780 static uint32_t actbuf[255], cmdbuf[255]; 3781 int rblen, ablen, cblen; 3782 3783 ipfw_insn *src, *dst, *cmd, *action, *prev=NULL; 3784 ipfw_insn *first_cmd; /* first match pattern */ 3785 3786 struct ip_fw_rule *rule; 3787 3788 /* 3789 * various flags used to record that we entered some fields. 3790 */ 3791 ipfw_insn *have_state = NULL; /* any state-related option */ 3792 int have_rstate = 0; 3793 ipfw_insn *have_log = NULL, *have_altq = NULL, *have_tag = NULL; 3794 ipfw_insn *have_skipcmd = NULL; 3795 size_t len; 3796 3797 int i; 3798 3799 int open_par = 0; /* open parenthesis ( */ 3800 3801 /* proto is here because it is used to fetch ports */ 3802 u_char proto = IPPROTO_IP; /* default protocol */ 3803 3804 double match_prob = 1; /* match probability, default is always match */ 3805 3806 bzero(actbuf, sizeof(actbuf)); /* actions go here */ 3807 bzero(cmdbuf, sizeof(cmdbuf)); 3808 bzero(rbuf, *rbufsize); 3809 3810 rule = (struct ip_fw_rule *)rbuf; 3811 cmd = (ipfw_insn *)cmdbuf; 3812 action = (ipfw_insn *)actbuf; 3813 3814 rblen = *rbufsize / sizeof(uint32_t); 3815 rblen -= sizeof(struct ip_fw_rule) / sizeof(uint32_t); 3816 ablen = sizeof(actbuf) / sizeof(actbuf[0]); 3817 cblen = sizeof(cmdbuf) / sizeof(cmdbuf[0]); 3818 cblen -= F_INSN_SIZE(ipfw_insn_u32) + 1; 3819 3820 #define CHECK_RBUFLEN(len) { CHECK_LENGTH(rblen, len); rblen -= len; } 3821 #define CHECK_ACTLEN CHECK_LENGTH(ablen, action->len) 3822 3823 av++; 3824 3825 /* [rule N] -- Rule number optional */ 3826 if (av[0] && isdigit(**av)) { 3827 rule->rulenum = atoi(*av); 3828 av++; 3829 } 3830 3831 /* [set N] -- set number (0..RESVD_SET), optional */ 3832 if (av[0] && av[1] && _substrcmp(*av, "set") == 0) { 3833 int set = strtoul(av[1], NULL, 10); 3834 if (set < 0 || set > RESVD_SET) 3835 errx(EX_DATAERR, "illegal set %s", av[1]); 3836 rule->set = set; 3837 tstate->set = set; 3838 av += 2; 3839 } 3840 3841 /* [prob D] -- match probability, optional */ 3842 if (av[0] && av[1] && _substrcmp(*av, "prob") == 0) { 3843 match_prob = strtod(av[1], NULL); 3844 3845 if (match_prob <= 0 || match_prob > 1) 3846 errx(EX_DATAERR, "illegal match prob. %s", av[1]); 3847 av += 2; 3848 } 3849 3850 /* action -- mandatory */ 3851 NEED1("missing action"); 3852 i = match_token(rule_actions, *av); 3853 av++; 3854 action->len = 1; /* default */ 3855 CHECK_ACTLEN; 3856 switch(i) { 3857 case TOK_CHECKSTATE: 3858 have_state = action; 3859 action->opcode = O_CHECK_STATE; 3860 if (*av == NULL || 3861 match_token(rule_options, *av) == TOK_COMMENT) { 3862 action->arg1 = pack_object(tstate, 3863 default_state_name, IPFW_TLV_STATE_NAME); 3864 break; 3865 } 3866 if (*av[0] == ':') { 3867 if (strcmp(*av + 1, "any") == 0) 3868 action->arg1 = 0; 3869 else if (state_check_name(*av + 1) == 0) 3870 action->arg1 = pack_object(tstate, *av + 1, 3871 IPFW_TLV_STATE_NAME); 3872 else 3873 errx(EX_DATAERR, "Invalid state name %s", 3874 *av); 3875 av++; 3876 break; 3877 } 3878 errx(EX_DATAERR, "Invalid state name %s", *av); 3879 break; 3880 3881 case TOK_ABORT: 3882 action->opcode = O_REJECT; 3883 action->arg1 = ICMP_REJECT_ABORT; 3884 break; 3885 3886 case TOK_ABORT6: 3887 action->opcode = O_UNREACH6; 3888 action->arg1 = ICMP6_UNREACH_ABORT; 3889 break; 3890 3891 case TOK_ACCEPT: 3892 action->opcode = O_ACCEPT; 3893 break; 3894 3895 case TOK_DENY: 3896 action->opcode = O_DENY; 3897 action->arg1 = 0; 3898 break; 3899 3900 case TOK_REJECT: 3901 action->opcode = O_REJECT; 3902 action->arg1 = ICMP_UNREACH_HOST; 3903 break; 3904 3905 case TOK_RESET: 3906 action->opcode = O_REJECT; 3907 action->arg1 = ICMP_REJECT_RST; 3908 break; 3909 3910 case TOK_RESET6: 3911 action->opcode = O_UNREACH6; 3912 action->arg1 = ICMP6_UNREACH_RST; 3913 break; 3914 3915 case TOK_UNREACH: 3916 action->opcode = O_REJECT; 3917 NEED1("missing reject code"); 3918 fill_reject_code(&action->arg1, *av); 3919 av++; 3920 break; 3921 3922 case TOK_UNREACH6: 3923 action->opcode = O_UNREACH6; 3924 NEED1("missing unreach code"); 3925 fill_unreach6_code(&action->arg1, *av); 3926 av++; 3927 break; 3928 3929 case TOK_COUNT: 3930 action->opcode = O_COUNT; 3931 break; 3932 3933 case TOK_NAT: 3934 action->opcode = O_NAT; 3935 action->len = F_INSN_SIZE(ipfw_insn_nat); 3936 CHECK_ACTLEN; 3937 if (*av != NULL && _substrcmp(*av, "global") == 0) { 3938 action->arg1 = IP_FW_NAT44_GLOBAL; 3939 av++; 3940 break; 3941 } else 3942 goto chkarg; 3943 case TOK_QUEUE: 3944 action->opcode = O_QUEUE; 3945 goto chkarg; 3946 case TOK_PIPE: 3947 action->opcode = O_PIPE; 3948 goto chkarg; 3949 case TOK_SKIPTO: 3950 action->opcode = O_SKIPTO; 3951 goto chkarg; 3952 case TOK_NETGRAPH: 3953 action->opcode = O_NETGRAPH; 3954 goto chkarg; 3955 case TOK_NGTEE: 3956 action->opcode = O_NGTEE; 3957 goto chkarg; 3958 case TOK_DIVERT: 3959 action->opcode = O_DIVERT; 3960 goto chkarg; 3961 case TOK_TEE: 3962 action->opcode = O_TEE; 3963 goto chkarg; 3964 case TOK_CALL: 3965 action->opcode = O_CALLRETURN; 3966 chkarg: 3967 if (!av[0]) 3968 errx(EX_USAGE, "missing argument for %s", *(av - 1)); 3969 if (isdigit(**av)) { 3970 action->arg1 = strtoul(*av, NULL, 10); 3971 if (action->arg1 <= 0 || action->arg1 >= IP_FW_TABLEARG) 3972 errx(EX_DATAERR, "illegal argument for %s", 3973 *(av - 1)); 3974 } else if (_substrcmp(*av, "tablearg") == 0) { 3975 action->arg1 = IP_FW_TARG; 3976 } else if (i == TOK_DIVERT || i == TOK_TEE) { 3977 struct servent *s; 3978 setservent(1); 3979 s = getservbyname(av[0], "divert"); 3980 if (s != NULL) 3981 action->arg1 = ntohs(s->s_port); 3982 else 3983 errx(EX_DATAERR, "illegal divert/tee port"); 3984 } else 3985 errx(EX_DATAERR, "illegal argument for %s", *(av - 1)); 3986 av++; 3987 break; 3988 3989 case TOK_FORWARD: { 3990 /* 3991 * Locate the address-port separator (':' or ','). 3992 * Could be one of the following: 3993 * hostname:port 3994 * IPv4 a.b.c.d,port 3995 * IPv4 a.b.c.d:port 3996 * IPv6 w:x:y::z,port 3997 * The ':' can only be used with hostname and IPv4 address. 3998 * XXX-BZ Should we also support [w:x:y::z]:port? 3999 */ 4000 struct sockaddr_storage result; 4001 struct addrinfo *res; 4002 char *s, *end; 4003 int family; 4004 u_short port_number; 4005 4006 NEED1("missing forward address[:port]"); 4007 4008 /* 4009 * locate the address-port separator (':' or ',') 4010 */ 4011 s = strchr(*av, ','); 4012 if (s == NULL) { 4013 /* Distinguish between IPv4:port and IPv6 cases. */ 4014 s = strchr(*av, ':'); 4015 if (s && strchr(s+1, ':')) 4016 s = NULL; /* no port */ 4017 } 4018 4019 port_number = 0; 4020 if (s != NULL) { 4021 /* Terminate host portion and set s to start of port. */ 4022 *(s++) = '\0'; 4023 i = strtoport(s, &end, 0 /* base */, 0 /* proto */); 4024 if (s == end) 4025 errx(EX_DATAERR, 4026 "illegal forwarding port ``%s''", s); 4027 port_number = (u_short)i; 4028 } 4029 4030 if (_substrcmp(*av, "tablearg") == 0) { 4031 family = PF_INET; 4032 ((struct sockaddr_in*)&result)->sin_addr.s_addr = 4033 INADDR_ANY; 4034 } else { 4035 /* 4036 * Resolve the host name or address to a family and a 4037 * network representation of the address. 4038 */ 4039 if (getaddrinfo(*av, NULL, NULL, &res)) 4040 errx(EX_DATAERR, NULL); 4041 /* Just use the first host in the answer. */ 4042 family = res->ai_family; 4043 memcpy(&result, res->ai_addr, res->ai_addrlen); 4044 freeaddrinfo(res); 4045 } 4046 4047 if (family == PF_INET) { 4048 ipfw_insn_sa *p = (ipfw_insn_sa *)action; 4049 4050 action->opcode = O_FORWARD_IP; 4051 action->len = F_INSN_SIZE(ipfw_insn_sa); 4052 CHECK_ACTLEN; 4053 4054 /* 4055 * In the kernel we assume AF_INET and use only 4056 * sin_port and sin_addr. Remember to set sin_len as 4057 * the routing code seems to use it too. 4058 */ 4059 p->sa.sin_len = sizeof(struct sockaddr_in); 4060 p->sa.sin_family = AF_INET; 4061 p->sa.sin_port = port_number; 4062 p->sa.sin_addr.s_addr = 4063 ((struct sockaddr_in *)&result)->sin_addr.s_addr; 4064 } else if (family == PF_INET6) { 4065 ipfw_insn_sa6 *p = (ipfw_insn_sa6 *)action; 4066 4067 action->opcode = O_FORWARD_IP6; 4068 action->len = F_INSN_SIZE(ipfw_insn_sa6); 4069 CHECK_ACTLEN; 4070 4071 p->sa.sin6_len = sizeof(struct sockaddr_in6); 4072 p->sa.sin6_family = AF_INET6; 4073 p->sa.sin6_port = port_number; 4074 p->sa.sin6_flowinfo = 0; 4075 p->sa.sin6_scope_id = 4076 ((struct sockaddr_in6 *)&result)->sin6_scope_id; 4077 bcopy(&((struct sockaddr_in6*)&result)->sin6_addr, 4078 &p->sa.sin6_addr, sizeof(p->sa.sin6_addr)); 4079 } else { 4080 errx(EX_DATAERR, "Invalid address family in forward action"); 4081 } 4082 av++; 4083 break; 4084 } 4085 case TOK_COMMENT: 4086 /* pretend it is a 'count' rule followed by the comment */ 4087 action->opcode = O_COUNT; 4088 av--; /* go back... */ 4089 break; 4090 4091 case TOK_SETFIB: 4092 { 4093 int numfibs; 4094 size_t intsize = sizeof(int); 4095 4096 action->opcode = O_SETFIB; 4097 NEED1("missing fib number"); 4098 if (_substrcmp(*av, "tablearg") == 0) { 4099 action->arg1 = IP_FW_TARG; 4100 } else { 4101 action->arg1 = strtoul(*av, NULL, 10); 4102 if (sysctlbyname("net.fibs", &numfibs, &intsize, 4103 NULL, 0) == -1) 4104 errx(EX_DATAERR, "fibs not suported.\n"); 4105 if (action->arg1 >= numfibs) /* Temporary */ 4106 errx(EX_DATAERR, "fib too large.\n"); 4107 /* Add high-order bit to fib to make room for tablearg*/ 4108 action->arg1 |= 0x8000; 4109 } 4110 av++; 4111 break; 4112 } 4113 4114 case TOK_SETDSCP: 4115 { 4116 int code; 4117 4118 action->opcode = O_SETDSCP; 4119 NEED1("missing DSCP code"); 4120 if (_substrcmp(*av, "tablearg") == 0) { 4121 action->arg1 = IP_FW_TARG; 4122 } else { 4123 if (isalpha(*av[0])) { 4124 if ((code = match_token(f_ipdscp, *av)) == -1) 4125 errx(EX_DATAERR, "Unknown DSCP code"); 4126 action->arg1 = code; 4127 } else 4128 action->arg1 = strtoul(*av, NULL, 10); 4129 /* 4130 * Add high-order bit to DSCP to make room 4131 * for tablearg 4132 */ 4133 action->arg1 |= 0x8000; 4134 } 4135 av++; 4136 break; 4137 } 4138 4139 case TOK_REASS: 4140 action->opcode = O_REASS; 4141 break; 4142 4143 case TOK_RETURN: 4144 fill_cmd(action, O_CALLRETURN, F_NOT, 0); 4145 break; 4146 4147 case TOK_TCPSETMSS: { 4148 u_long mss; 4149 uint16_t idx; 4150 4151 idx = pack_object(tstate, "tcp-setmss", IPFW_TLV_EACTION); 4152 if (idx == 0) 4153 errx(EX_DATAERR, "pack_object failed"); 4154 fill_cmd(action, O_EXTERNAL_ACTION, 0, idx); 4155 NEED1("Missing MSS value"); 4156 action = next_cmd(action, &ablen); 4157 action->len = 1; 4158 CHECK_ACTLEN; 4159 mss = strtoul(*av, NULL, 10); 4160 if (mss == 0 || mss > UINT16_MAX) 4161 errx(EX_USAGE, "invalid MSS value %s", *av); 4162 fill_cmd(action, O_EXTERNAL_DATA, 0, (uint16_t)mss); 4163 av++; 4164 break; 4165 } 4166 4167 default: 4168 av--; 4169 if (match_token(rule_eactions, *av) == -1) 4170 errx(EX_DATAERR, "invalid action %s\n", *av); 4171 /* 4172 * External actions support. 4173 * XXX: we support only syntax with instance name. 4174 * For known external actions (from rule_eactions list) 4175 * we can handle syntax directly. But with `eaction' 4176 * keyword we can use only `eaction <name> <instance>' 4177 * syntax. 4178 */ 4179 case TOK_EACTION: { 4180 uint16_t idx; 4181 4182 NEED1("Missing eaction name"); 4183 if (eaction_check_name(*av) != 0) 4184 errx(EX_DATAERR, "Invalid eaction name %s", *av); 4185 idx = pack_object(tstate, *av, IPFW_TLV_EACTION); 4186 if (idx == 0) 4187 errx(EX_DATAERR, "pack_object failed"); 4188 fill_cmd(action, O_EXTERNAL_ACTION, 0, idx); 4189 av++; 4190 NEED1("Missing eaction instance name"); 4191 action = next_cmd(action, &ablen); 4192 action->len = 1; 4193 CHECK_ACTLEN; 4194 if (eaction_check_name(*av) != 0) 4195 errx(EX_DATAERR, "Invalid eaction instance name %s", 4196 *av); 4197 /* 4198 * External action instance object has TLV type depended 4199 * from the external action name object index. Since we 4200 * currently don't know this index, use zero as TLV type. 4201 */ 4202 idx = pack_object(tstate, *av, 0); 4203 if (idx == 0) 4204 errx(EX_DATAERR, "pack_object failed"); 4205 fill_cmd(action, O_EXTERNAL_INSTANCE, 0, idx); 4206 av++; 4207 } 4208 } 4209 action = next_cmd(action, &ablen); 4210 4211 /* 4212 * [altq queuename] -- altq tag, optional 4213 * [log [logamount N]] -- log, optional 4214 * 4215 * If they exist, it go first in the cmdbuf, but then it is 4216 * skipped in the copy section to the end of the buffer. 4217 */ 4218 while (av[0] != NULL && (i = match_token(rule_action_params, *av)) != -1) { 4219 av++; 4220 switch (i) { 4221 case TOK_LOG: 4222 { 4223 ipfw_insn_log *c = (ipfw_insn_log *)cmd; 4224 int l; 4225 4226 if (have_log) 4227 errx(EX_DATAERR, 4228 "log cannot be specified more than once"); 4229 have_log = (ipfw_insn *)c; 4230 cmd->len = F_INSN_SIZE(ipfw_insn_log); 4231 CHECK_CMDLEN; 4232 cmd->opcode = O_LOG; 4233 if (av[0] && _substrcmp(*av, "logamount") == 0) { 4234 av++; 4235 NEED1("logamount requires argument"); 4236 l = atoi(*av); 4237 if (l < 0) 4238 errx(EX_DATAERR, 4239 "logamount must be positive"); 4240 c->max_log = l; 4241 av++; 4242 } else { 4243 len = sizeof(c->max_log); 4244 if (sysctlbyname("net.inet.ip.fw.verbose_limit", 4245 &c->max_log, &len, NULL, 0) == -1) { 4246 if (co.test_only) { 4247 c->max_log = 0; 4248 break; 4249 } 4250 errx(1, "sysctlbyname(\"%s\")", 4251 "net.inet.ip.fw.verbose_limit"); 4252 } 4253 } 4254 } 4255 break; 4256 4257 #ifndef NO_ALTQ 4258 case TOK_ALTQ: 4259 { 4260 ipfw_insn_altq *a = (ipfw_insn_altq *)cmd; 4261 4262 NEED1("missing altq queue name"); 4263 if (have_altq) 4264 errx(EX_DATAERR, 4265 "altq cannot be specified more than once"); 4266 have_altq = (ipfw_insn *)a; 4267 cmd->len = F_INSN_SIZE(ipfw_insn_altq); 4268 CHECK_CMDLEN; 4269 cmd->opcode = O_ALTQ; 4270 a->qid = altq_name_to_qid(*av); 4271 av++; 4272 } 4273 break; 4274 #endif 4275 4276 case TOK_TAG: 4277 case TOK_UNTAG: { 4278 uint16_t tag; 4279 4280 if (have_tag) 4281 errx(EX_USAGE, "tag and untag cannot be " 4282 "specified more than once"); 4283 GET_UINT_ARG(tag, IPFW_ARG_MIN, IPFW_ARG_MAX, i, 4284 rule_action_params); 4285 have_tag = cmd; 4286 fill_cmd(cmd, O_TAG, (i == TOK_TAG) ? 0: F_NOT, tag); 4287 av++; 4288 break; 4289 } 4290 4291 default: 4292 abort(); 4293 } 4294 cmd = next_cmd(cmd, &cblen); 4295 } 4296 4297 if (have_state) { /* must be a check-state, we are done */ 4298 if (*av != NULL && 4299 match_token(rule_options, *av) == TOK_COMMENT) { 4300 /* check-state has a comment */ 4301 av++; 4302 fill_comment(cmd, av, cblen); 4303 cmd = next_cmd(cmd, &cblen); 4304 av[0] = NULL; 4305 } 4306 goto done; 4307 } 4308 4309 #define OR_START(target) \ 4310 if (av[0] && (*av[0] == '(' || *av[0] == '{')) { \ 4311 if (open_par) \ 4312 errx(EX_USAGE, "nested \"(\" not allowed\n"); \ 4313 prev = NULL; \ 4314 open_par = 1; \ 4315 if ( (av[0])[1] == '\0') { \ 4316 av++; \ 4317 } else \ 4318 (*av)++; \ 4319 } \ 4320 target: \ 4321 4322 4323 #define CLOSE_PAR \ 4324 if (open_par) { \ 4325 if (av[0] && ( \ 4326 strcmp(*av, ")") == 0 || \ 4327 strcmp(*av, "}") == 0)) { \ 4328 prev = NULL; \ 4329 open_par = 0; \ 4330 av++; \ 4331 } else \ 4332 errx(EX_USAGE, "missing \")\"\n"); \ 4333 } 4334 4335 #define NOT_BLOCK \ 4336 if (av[0] && _substrcmp(*av, "not") == 0) { \ 4337 if (cmd->len & F_NOT) \ 4338 errx(EX_USAGE, "double \"not\" not allowed\n"); \ 4339 cmd->len |= F_NOT; \ 4340 av++; \ 4341 } 4342 4343 #define OR_BLOCK(target) \ 4344 if (av[0] && _substrcmp(*av, "or") == 0) { \ 4345 if (prev == NULL || open_par == 0) \ 4346 errx(EX_DATAERR, "invalid OR block"); \ 4347 prev->len |= F_OR; \ 4348 av++; \ 4349 goto target; \ 4350 } \ 4351 CLOSE_PAR; 4352 4353 first_cmd = cmd; 4354 4355 #if 0 4356 /* 4357 * MAC addresses, optional. 4358 * If we have this, we skip the part "proto from src to dst" 4359 * and jump straight to the option parsing. 4360 */ 4361 NOT_BLOCK; 4362 NEED1("missing protocol"); 4363 if (_substrcmp(*av, "MAC") == 0 || 4364 _substrcmp(*av, "mac") == 0) { 4365 av++; /* the "MAC" keyword */ 4366 add_mac(cmd, av); /* exits in case of errors */ 4367 cmd = next_cmd(cmd); 4368 av += 2; /* dst-mac and src-mac */ 4369 NOT_BLOCK; 4370 NEED1("missing mac type"); 4371 if (add_mactype(cmd, av[0])) 4372 cmd = next_cmd(cmd); 4373 av++; /* any or mac-type */ 4374 goto read_options; 4375 } 4376 #endif 4377 4378 /* 4379 * protocol, mandatory 4380 */ 4381 OR_START(get_proto); 4382 NOT_BLOCK; 4383 NEED1("missing protocol"); 4384 if (add_proto_compat(cmd, *av, &proto)) { 4385 av++; 4386 if (F_LEN(cmd) != 0) { 4387 prev = cmd; 4388 cmd = next_cmd(cmd, &cblen); 4389 } 4390 } else if (first_cmd != cmd) { 4391 errx(EX_DATAERR, "invalid protocol ``%s''", *av); 4392 } else { 4393 rule->flags |= IPFW_RULE_JUSTOPTS; 4394 goto read_options; 4395 } 4396 OR_BLOCK(get_proto); 4397 4398 /* 4399 * "from", mandatory 4400 */ 4401 if ((av[0] == NULL) || _substrcmp(*av, "from") != 0) 4402 errx(EX_USAGE, "missing ``from''"); 4403 av++; 4404 4405 /* 4406 * source IP, mandatory 4407 */ 4408 OR_START(source_ip); 4409 NOT_BLOCK; /* optional "not" */ 4410 NEED1("missing source address"); 4411 if (add_src(cmd, *av, proto, cblen, tstate)) { 4412 av++; 4413 if (F_LEN(cmd) != 0) { /* ! any */ 4414 prev = cmd; 4415 cmd = next_cmd(cmd, &cblen); 4416 } 4417 } else 4418 errx(EX_USAGE, "bad source address %s", *av); 4419 OR_BLOCK(source_ip); 4420 4421 /* 4422 * source ports, optional 4423 */ 4424 NOT_BLOCK; /* optional "not" */ 4425 if ( av[0] != NULL ) { 4426 if (_substrcmp(*av, "any") == 0 || 4427 add_ports(cmd, *av, proto, O_IP_SRCPORT, cblen)) { 4428 av++; 4429 if (F_LEN(cmd) != 0) 4430 cmd = next_cmd(cmd, &cblen); 4431 } 4432 } 4433 4434 /* 4435 * "to", mandatory 4436 */ 4437 if ( (av[0] == NULL) || _substrcmp(*av, "to") != 0 ) 4438 errx(EX_USAGE, "missing ``to''"); 4439 av++; 4440 4441 /* 4442 * destination, mandatory 4443 */ 4444 OR_START(dest_ip); 4445 NOT_BLOCK; /* optional "not" */ 4446 NEED1("missing dst address"); 4447 if (add_dst(cmd, *av, proto, cblen, tstate)) { 4448 av++; 4449 if (F_LEN(cmd) != 0) { /* ! any */ 4450 prev = cmd; 4451 cmd = next_cmd(cmd, &cblen); 4452 } 4453 } else 4454 errx( EX_USAGE, "bad destination address %s", *av); 4455 OR_BLOCK(dest_ip); 4456 4457 /* 4458 * dest. ports, optional 4459 */ 4460 NOT_BLOCK; /* optional "not" */ 4461 if (av[0]) { 4462 if (_substrcmp(*av, "any") == 0 || 4463 add_ports(cmd, *av, proto, O_IP_DSTPORT, cblen)) { 4464 av++; 4465 if (F_LEN(cmd) != 0) 4466 cmd = next_cmd(cmd, &cblen); 4467 } 4468 } 4469 4470 read_options: 4471 prev = NULL; 4472 while ( av[0] != NULL ) { 4473 char *s; 4474 ipfw_insn_u32 *cmd32; /* alias for cmd */ 4475 4476 s = *av; 4477 cmd32 = (ipfw_insn_u32 *)cmd; 4478 4479 if (*s == '!') { /* alternate syntax for NOT */ 4480 if (cmd->len & F_NOT) 4481 errx(EX_USAGE, "double \"not\" not allowed\n"); 4482 cmd->len = F_NOT; 4483 s++; 4484 } 4485 i = match_token(rule_options, s); 4486 av++; 4487 switch(i) { 4488 case TOK_NOT: 4489 if (cmd->len & F_NOT) 4490 errx(EX_USAGE, "double \"not\" not allowed\n"); 4491 cmd->len = F_NOT; 4492 break; 4493 4494 case TOK_OR: 4495 if (open_par == 0 || prev == NULL) 4496 errx(EX_USAGE, "invalid \"or\" block\n"); 4497 prev->len |= F_OR; 4498 break; 4499 4500 case TOK_STARTBRACE: 4501 if (open_par) 4502 errx(EX_USAGE, "+nested \"(\" not allowed\n"); 4503 open_par = 1; 4504 break; 4505 4506 case TOK_ENDBRACE: 4507 if (!open_par) 4508 errx(EX_USAGE, "+missing \")\"\n"); 4509 open_par = 0; 4510 prev = NULL; 4511 break; 4512 4513 case TOK_IN: 4514 fill_cmd(cmd, O_IN, 0, 0); 4515 break; 4516 4517 case TOK_OUT: 4518 cmd->len ^= F_NOT; /* toggle F_NOT */ 4519 fill_cmd(cmd, O_IN, 0, 0); 4520 break; 4521 4522 case TOK_DIVERTED: 4523 fill_cmd(cmd, O_DIVERTED, 0, 3); 4524 break; 4525 4526 case TOK_DIVERTEDLOOPBACK: 4527 fill_cmd(cmd, O_DIVERTED, 0, 1); 4528 break; 4529 4530 case TOK_DIVERTEDOUTPUT: 4531 fill_cmd(cmd, O_DIVERTED, 0, 2); 4532 break; 4533 4534 case TOK_FRAG: 4535 fill_cmd(cmd, O_FRAG, 0, 0); 4536 break; 4537 4538 case TOK_LAYER2: 4539 fill_cmd(cmd, O_LAYER2, 0, 0); 4540 break; 4541 4542 case TOK_XMIT: 4543 case TOK_RECV: 4544 case TOK_VIA: 4545 NEED1("recv, xmit, via require interface name" 4546 " or address"); 4547 fill_iface((ipfw_insn_if *)cmd, av[0], cblen, tstate); 4548 av++; 4549 if (F_LEN(cmd) == 0) /* not a valid address */ 4550 break; 4551 if (i == TOK_XMIT) 4552 cmd->opcode = O_XMIT; 4553 else if (i == TOK_RECV) 4554 cmd->opcode = O_RECV; 4555 else if (i == TOK_VIA) 4556 cmd->opcode = O_VIA; 4557 break; 4558 4559 case TOK_ICMPTYPES: 4560 NEED1("icmptypes requires list of types"); 4561 fill_icmptypes((ipfw_insn_u32 *)cmd, *av); 4562 av++; 4563 break; 4564 4565 case TOK_ICMP6TYPES: 4566 NEED1("icmptypes requires list of types"); 4567 fill_icmp6types((ipfw_insn_icmp6 *)cmd, *av, cblen); 4568 av++; 4569 break; 4570 4571 case TOK_IPTTL: 4572 NEED1("ipttl requires TTL"); 4573 if (strpbrk(*av, "-,")) { 4574 if (!add_ports(cmd, *av, 0, O_IPTTL, cblen)) 4575 errx(EX_DATAERR, "invalid ipttl %s", *av); 4576 } else 4577 fill_cmd(cmd, O_IPTTL, 0, strtoul(*av, NULL, 0)); 4578 av++; 4579 break; 4580 4581 case TOK_IPID: 4582 NEED1("ipid requires id"); 4583 if (strpbrk(*av, "-,")) { 4584 if (!add_ports(cmd, *av, 0, O_IPID, cblen)) 4585 errx(EX_DATAERR, "invalid ipid %s", *av); 4586 } else 4587 fill_cmd(cmd, O_IPID, 0, strtoul(*av, NULL, 0)); 4588 av++; 4589 break; 4590 4591 case TOK_IPLEN: 4592 NEED1("iplen requires length"); 4593 if (strpbrk(*av, "-,")) { 4594 if (!add_ports(cmd, *av, 0, O_IPLEN, cblen)) 4595 errx(EX_DATAERR, "invalid ip len %s", *av); 4596 } else 4597 fill_cmd(cmd, O_IPLEN, 0, strtoul(*av, NULL, 0)); 4598 av++; 4599 break; 4600 4601 case TOK_IPVER: 4602 NEED1("ipver requires version"); 4603 fill_cmd(cmd, O_IPVER, 0, strtoul(*av, NULL, 0)); 4604 av++; 4605 break; 4606 4607 case TOK_IPPRECEDENCE: 4608 NEED1("ipprecedence requires value"); 4609 fill_cmd(cmd, O_IPPRECEDENCE, 0, 4610 (strtoul(*av, NULL, 0) & 7) << 5); 4611 av++; 4612 break; 4613 4614 case TOK_DSCP: 4615 NEED1("missing DSCP code"); 4616 fill_dscp(cmd, *av, cblen); 4617 av++; 4618 break; 4619 4620 case TOK_IPOPTS: 4621 NEED1("missing argument for ipoptions"); 4622 fill_flags_cmd(cmd, O_IPOPT, f_ipopts, *av); 4623 av++; 4624 break; 4625 4626 case TOK_IPTOS: 4627 NEED1("missing argument for iptos"); 4628 fill_flags_cmd(cmd, O_IPTOS, f_iptos, *av); 4629 av++; 4630 break; 4631 4632 case TOK_UID: 4633 NEED1("uid requires argument"); 4634 { 4635 char *end; 4636 uid_t uid; 4637 struct passwd *pwd; 4638 4639 cmd->opcode = O_UID; 4640 uid = strtoul(*av, &end, 0); 4641 pwd = (*end == '\0') ? getpwuid(uid) : getpwnam(*av); 4642 if (pwd == NULL) 4643 errx(EX_DATAERR, "uid \"%s\" nonexistent", *av); 4644 cmd32->d[0] = pwd->pw_uid; 4645 cmd->len |= F_INSN_SIZE(ipfw_insn_u32); 4646 av++; 4647 } 4648 break; 4649 4650 case TOK_GID: 4651 NEED1("gid requires argument"); 4652 { 4653 char *end; 4654 gid_t gid; 4655 struct group *grp; 4656 4657 cmd->opcode = O_GID; 4658 gid = strtoul(*av, &end, 0); 4659 grp = (*end == '\0') ? getgrgid(gid) : getgrnam(*av); 4660 if (grp == NULL) 4661 errx(EX_DATAERR, "gid \"%s\" nonexistent", *av); 4662 cmd32->d[0] = grp->gr_gid; 4663 cmd->len |= F_INSN_SIZE(ipfw_insn_u32); 4664 av++; 4665 } 4666 break; 4667 4668 case TOK_JAIL: 4669 NEED1("jail requires argument"); 4670 { 4671 int jid; 4672 4673 cmd->opcode = O_JAIL; 4674 jid = jail_getid(*av); 4675 if (jid < 0) 4676 errx(EX_DATAERR, "%s", jail_errmsg); 4677 cmd32->d[0] = (uint32_t)jid; 4678 cmd->len |= F_INSN_SIZE(ipfw_insn_u32); 4679 av++; 4680 } 4681 break; 4682 4683 case TOK_ESTAB: 4684 fill_cmd(cmd, O_ESTAB, 0, 0); 4685 break; 4686 4687 case TOK_SETUP: 4688 fill_cmd(cmd, O_TCPFLAGS, 0, 4689 (TH_SYN) | ( (TH_ACK) & 0xff) <<8 ); 4690 break; 4691 4692 case TOK_TCPDATALEN: 4693 NEED1("tcpdatalen requires length"); 4694 if (strpbrk(*av, "-,")) { 4695 if (!add_ports(cmd, *av, 0, O_TCPDATALEN, cblen)) 4696 errx(EX_DATAERR, "invalid tcpdata len %s", *av); 4697 } else 4698 fill_cmd(cmd, O_TCPDATALEN, 0, 4699 strtoul(*av, NULL, 0)); 4700 av++; 4701 break; 4702 4703 case TOK_TCPOPTS: 4704 NEED1("missing argument for tcpoptions"); 4705 fill_flags_cmd(cmd, O_TCPOPTS, f_tcpopts, *av); 4706 av++; 4707 break; 4708 4709 case TOK_TCPSEQ: 4710 case TOK_TCPACK: 4711 NEED1("tcpseq/tcpack requires argument"); 4712 cmd->len = F_INSN_SIZE(ipfw_insn_u32); 4713 cmd->opcode = (i == TOK_TCPSEQ) ? O_TCPSEQ : O_TCPACK; 4714 cmd32->d[0] = htonl(strtoul(*av, NULL, 0)); 4715 av++; 4716 break; 4717 4718 case TOK_TCPMSS: 4719 case TOK_TCPWIN: 4720 NEED1("tcpmss/tcpwin requires size"); 4721 if (strpbrk(*av, "-,")) { 4722 if (add_ports(cmd, *av, 0, 4723 i == TOK_TCPWIN ? O_TCPWIN : O_TCPMSS, 4724 cblen) == NULL) 4725 errx(EX_DATAERR, "invalid %s size %s", 4726 s, *av); 4727 } else 4728 fill_cmd(cmd, i == TOK_TCPWIN ? O_TCPWIN : 4729 O_TCPMSS, 0, strtoul(*av, NULL, 0)); 4730 av++; 4731 break; 4732 4733 case TOK_TCPFLAGS: 4734 NEED1("missing argument for tcpflags"); 4735 cmd->opcode = O_TCPFLAGS; 4736 fill_flags_cmd(cmd, O_TCPFLAGS, f_tcpflags, *av); 4737 av++; 4738 break; 4739 4740 case TOK_KEEPSTATE: 4741 case TOK_RECORDSTATE: { 4742 uint16_t uidx; 4743 4744 if (open_par) 4745 errx(EX_USAGE, "keep-state or record-state cannot be part " 4746 "of an or block"); 4747 if (have_state) 4748 errx(EX_USAGE, "only one of keep-state, record-state, " 4749 " limit and set-limit is allowed"); 4750 if (*av != NULL && *av[0] == ':') { 4751 if (state_check_name(*av + 1) != 0) 4752 errx(EX_DATAERR, 4753 "Invalid state name %s", *av); 4754 uidx = pack_object(tstate, *av + 1, 4755 IPFW_TLV_STATE_NAME); 4756 av++; 4757 } else 4758 uidx = pack_object(tstate, default_state_name, 4759 IPFW_TLV_STATE_NAME); 4760 have_state = cmd; 4761 have_rstate = i == TOK_RECORDSTATE; 4762 fill_cmd(cmd, O_KEEP_STATE, 0, uidx); 4763 break; 4764 } 4765 4766 case TOK_LIMIT: 4767 case TOK_SETLIMIT: { 4768 ipfw_insn_limit *c = (ipfw_insn_limit *)cmd; 4769 int val; 4770 4771 if (open_par) 4772 errx(EX_USAGE, 4773 "limit or set-limit cannot be part of an or block"); 4774 if (have_state) 4775 errx(EX_USAGE, "only one of keep-state, record-state, " 4776 " limit and set-limit is allowed"); 4777 have_state = cmd; 4778 have_rstate = i == TOK_SETLIMIT; 4779 4780 cmd->len = F_INSN_SIZE(ipfw_insn_limit); 4781 CHECK_CMDLEN; 4782 cmd->opcode = O_LIMIT; 4783 c->limit_mask = c->conn_limit = 0; 4784 4785 while ( av[0] != NULL ) { 4786 if ((val = match_token(limit_masks, *av)) <= 0) 4787 break; 4788 c->limit_mask |= val; 4789 av++; 4790 } 4791 4792 if (c->limit_mask == 0) 4793 errx(EX_USAGE, "limit: missing limit mask"); 4794 4795 GET_UINT_ARG(c->conn_limit, IPFW_ARG_MIN, IPFW_ARG_MAX, 4796 TOK_LIMIT, rule_options); 4797 av++; 4798 4799 if (*av != NULL && *av[0] == ':') { 4800 if (state_check_name(*av + 1) != 0) 4801 errx(EX_DATAERR, 4802 "Invalid state name %s", *av); 4803 cmd->arg1 = pack_object(tstate, *av + 1, 4804 IPFW_TLV_STATE_NAME); 4805 av++; 4806 } else 4807 cmd->arg1 = pack_object(tstate, 4808 default_state_name, IPFW_TLV_STATE_NAME); 4809 break; 4810 } 4811 4812 case TOK_PROTO: 4813 NEED1("missing protocol"); 4814 if (add_proto(cmd, *av, &proto)) { 4815 av++; 4816 } else 4817 errx(EX_DATAERR, "invalid protocol ``%s''", 4818 *av); 4819 break; 4820 4821 case TOK_SRCIP: 4822 NEED1("missing source IP"); 4823 if (add_srcip(cmd, *av, cblen, tstate)) { 4824 av++; 4825 } 4826 break; 4827 4828 case TOK_DSTIP: 4829 NEED1("missing destination IP"); 4830 if (add_dstip(cmd, *av, cblen, tstate)) { 4831 av++; 4832 } 4833 break; 4834 4835 case TOK_SRCIP6: 4836 NEED1("missing source IP6"); 4837 if (add_srcip6(cmd, *av, cblen, tstate)) { 4838 av++; 4839 } 4840 break; 4841 4842 case TOK_DSTIP6: 4843 NEED1("missing destination IP6"); 4844 if (add_dstip6(cmd, *av, cblen, tstate)) { 4845 av++; 4846 } 4847 break; 4848 4849 case TOK_SRCPORT: 4850 NEED1("missing source port"); 4851 if (_substrcmp(*av, "any") == 0 || 4852 add_ports(cmd, *av, proto, O_IP_SRCPORT, cblen)) { 4853 av++; 4854 } else 4855 errx(EX_DATAERR, "invalid source port %s", *av); 4856 break; 4857 4858 case TOK_DSTPORT: 4859 NEED1("missing destination port"); 4860 if (_substrcmp(*av, "any") == 0 || 4861 add_ports(cmd, *av, proto, O_IP_DSTPORT, cblen)) { 4862 av++; 4863 } else 4864 errx(EX_DATAERR, "invalid destination port %s", 4865 *av); 4866 break; 4867 4868 case TOK_MAC: 4869 if (add_mac(cmd, av, cblen)) 4870 av += 2; 4871 break; 4872 4873 case TOK_MACTYPE: 4874 NEED1("missing mac type"); 4875 if (!add_mactype(cmd, *av, cblen)) 4876 errx(EX_DATAERR, "invalid mac type %s", *av); 4877 av++; 4878 break; 4879 4880 case TOK_VERREVPATH: 4881 fill_cmd(cmd, O_VERREVPATH, 0, 0); 4882 break; 4883 4884 case TOK_VERSRCREACH: 4885 fill_cmd(cmd, O_VERSRCREACH, 0, 0); 4886 break; 4887 4888 case TOK_ANTISPOOF: 4889 fill_cmd(cmd, O_ANTISPOOF, 0, 0); 4890 break; 4891 4892 case TOK_IPSEC: 4893 fill_cmd(cmd, O_IPSEC, 0, 0); 4894 break; 4895 4896 case TOK_IPV6: 4897 fill_cmd(cmd, O_IP6, 0, 0); 4898 break; 4899 4900 case TOK_IPV4: 4901 fill_cmd(cmd, O_IP4, 0, 0); 4902 break; 4903 4904 case TOK_EXT6HDR: 4905 fill_ext6hdr( cmd, *av ); 4906 av++; 4907 break; 4908 4909 case TOK_FLOWID: 4910 if (proto != IPPROTO_IPV6 ) 4911 errx( EX_USAGE, "flow-id filter is active " 4912 "only for ipv6 protocol\n"); 4913 fill_flow6( (ipfw_insn_u32 *) cmd, *av, cblen); 4914 av++; 4915 break; 4916 4917 case TOK_COMMENT: 4918 fill_comment(cmd, av, cblen); 4919 av[0]=NULL; 4920 break; 4921 4922 case TOK_TAGGED: 4923 if (av[0] && strpbrk(*av, "-,")) { 4924 if (!add_ports(cmd, *av, 0, O_TAGGED, cblen)) 4925 errx(EX_DATAERR, "tagged: invalid tag" 4926 " list: %s", *av); 4927 } 4928 else { 4929 uint16_t tag; 4930 4931 GET_UINT_ARG(tag, IPFW_ARG_MIN, IPFW_ARG_MAX, 4932 TOK_TAGGED, rule_options); 4933 fill_cmd(cmd, O_TAGGED, 0, tag); 4934 } 4935 av++; 4936 break; 4937 4938 case TOK_FIB: 4939 NEED1("fib requires fib number"); 4940 fill_cmd(cmd, O_FIB, 0, strtoul(*av, NULL, 0)); 4941 av++; 4942 break; 4943 case TOK_SOCKARG: 4944 fill_cmd(cmd, O_SOCKARG, 0, 0); 4945 break; 4946 4947 case TOK_LOOKUP: { 4948 ipfw_insn_u32 *c = (ipfw_insn_u32 *)cmd; 4949 int j; 4950 4951 if (!av[0] || !av[1]) 4952 errx(EX_USAGE, "format: lookup argument tablenum"); 4953 cmd->opcode = O_IP_DST_LOOKUP; 4954 cmd->len |= F_INSN_SIZE(ipfw_insn) + 2; 4955 i = match_token(rule_options, *av); 4956 for (j = 0; lookup_key[j] >= 0 ; j++) { 4957 if (i == lookup_key[j]) 4958 break; 4959 } 4960 if (lookup_key[j] <= 0) 4961 errx(EX_USAGE, "format: cannot lookup on %s", *av); 4962 __PAST_END(c->d, 1) = j; // i converted to option 4963 av++; 4964 4965 if ((j = pack_table(tstate, *av)) == 0) 4966 errx(EX_DATAERR, "Invalid table name: %s", *av); 4967 4968 cmd->arg1 = j; 4969 av++; 4970 } 4971 break; 4972 case TOK_FLOW: 4973 NEED1("missing table name"); 4974 if (strncmp(*av, "table(", 6) != 0) 4975 errx(EX_DATAERR, 4976 "enclose table name into \"table()\""); 4977 fill_table(cmd, *av, O_IP_FLOW_LOOKUP, tstate); 4978 av++; 4979 break; 4980 4981 case TOK_SKIPACTION: 4982 if (have_skipcmd) 4983 errx(EX_USAGE, "only one defer-action " 4984 "is allowed"); 4985 have_skipcmd = cmd; 4986 fill_cmd(cmd, O_SKIP_ACTION, 0, 0); 4987 break; 4988 4989 default: 4990 errx(EX_USAGE, "unrecognised option [%d] %s\n", i, s); 4991 } 4992 if (F_LEN(cmd) > 0) { /* prepare to advance */ 4993 prev = cmd; 4994 cmd = next_cmd(cmd, &cblen); 4995 } 4996 } 4997 4998 done: 4999 5000 if (!have_state && have_skipcmd) 5001 warnx("Rule contains \"defer-immediate-action\" " 5002 "and doesn't contain any state-related options."); 5003 5004 /* 5005 * Now copy stuff into the rule. 5006 * If we have a keep-state option, the first instruction 5007 * must be a PROBE_STATE (which is generated here). 5008 * If we have a LOG option, it was stored as the first command, 5009 * and now must be moved to the top of the action part. 5010 */ 5011 dst = (ipfw_insn *)rule->cmd; 5012 5013 /* 5014 * First thing to write into the command stream is the match probability. 5015 */ 5016 if (match_prob != 1) { /* 1 means always match */ 5017 dst->opcode = O_PROB; 5018 dst->len = 2; 5019 *((int32_t *)(dst+1)) = (int32_t)(match_prob * 0x7fffffff); 5020 dst += dst->len; 5021 } 5022 5023 /* 5024 * generate O_PROBE_STATE if necessary 5025 */ 5026 if (have_state && have_state->opcode != O_CHECK_STATE && !have_rstate) { 5027 fill_cmd(dst, O_PROBE_STATE, 0, have_state->arg1); 5028 dst = next_cmd(dst, &rblen); 5029 } 5030 5031 /* 5032 * copy all commands but O_LOG, O_KEEP_STATE, O_LIMIT, O_ALTQ, O_TAG, 5033 * O_SKIP_ACTION 5034 */ 5035 for (src = (ipfw_insn *)cmdbuf; src != cmd; src += i) { 5036 i = F_LEN(src); 5037 CHECK_RBUFLEN(i); 5038 5039 switch (src->opcode) { 5040 case O_LOG: 5041 case O_KEEP_STATE: 5042 case O_LIMIT: 5043 case O_ALTQ: 5044 case O_TAG: 5045 case O_SKIP_ACTION: 5046 break; 5047 default: 5048 bcopy(src, dst, i * sizeof(uint32_t)); 5049 dst += i; 5050 } 5051 } 5052 5053 /* 5054 * put back the have_state command as last opcode 5055 */ 5056 if (have_state && have_state->opcode != O_CHECK_STATE) { 5057 i = F_LEN(have_state); 5058 CHECK_RBUFLEN(i); 5059 bcopy(have_state, dst, i * sizeof(uint32_t)); 5060 dst += i; 5061 } 5062 5063 /* 5064 * put back the have_skipcmd command as very last opcode 5065 */ 5066 if (have_skipcmd) { 5067 i = F_LEN(have_skipcmd); 5068 CHECK_RBUFLEN(i); 5069 bcopy(have_skipcmd, dst, i * sizeof(uint32_t)); 5070 dst += i; 5071 } 5072 5073 /* 5074 * start action section 5075 */ 5076 rule->act_ofs = dst - rule->cmd; 5077 5078 /* put back O_LOG, O_ALTQ, O_TAG if necessary */ 5079 if (have_log) { 5080 i = F_LEN(have_log); 5081 CHECK_RBUFLEN(i); 5082 bcopy(have_log, dst, i * sizeof(uint32_t)); 5083 dst += i; 5084 } 5085 if (have_altq) { 5086 i = F_LEN(have_altq); 5087 CHECK_RBUFLEN(i); 5088 bcopy(have_altq, dst, i * sizeof(uint32_t)); 5089 dst += i; 5090 } 5091 if (have_tag) { 5092 i = F_LEN(have_tag); 5093 CHECK_RBUFLEN(i); 5094 bcopy(have_tag, dst, i * sizeof(uint32_t)); 5095 dst += i; 5096 } 5097 5098 /* 5099 * copy all other actions 5100 */ 5101 for (src = (ipfw_insn *)actbuf; src != action; src += i) { 5102 i = F_LEN(src); 5103 CHECK_RBUFLEN(i); 5104 bcopy(src, dst, i * sizeof(uint32_t)); 5105 dst += i; 5106 } 5107 5108 rule->cmd_len = (uint32_t *)dst - (uint32_t *)(rule->cmd); 5109 *rbufsize = (char *)dst - (char *)rule; 5110 } 5111 5112 static int 5113 compare_ntlv(const void *_a, const void *_b) 5114 { 5115 ipfw_obj_ntlv *a, *b; 5116 5117 a = (ipfw_obj_ntlv *)_a; 5118 b = (ipfw_obj_ntlv *)_b; 5119 5120 if (a->set < b->set) 5121 return (-1); 5122 else if (a->set > b->set) 5123 return (1); 5124 5125 if (a->idx < b->idx) 5126 return (-1); 5127 else if (a->idx > b->idx) 5128 return (1); 5129 5130 if (a->head.type < b->head.type) 5131 return (-1); 5132 else if (a->head.type > b->head.type) 5133 return (1); 5134 5135 return (0); 5136 } 5137 5138 /* 5139 * Provide kernel with sorted list of referenced objects 5140 */ 5141 static void 5142 object_sort_ctlv(ipfw_obj_ctlv *ctlv) 5143 { 5144 5145 qsort(ctlv + 1, ctlv->count, ctlv->objsize, compare_ntlv); 5146 } 5147 5148 struct object_kt { 5149 uint16_t uidx; 5150 uint16_t type; 5151 }; 5152 static int 5153 compare_object_kntlv(const void *k, const void *v) 5154 { 5155 ipfw_obj_ntlv *ntlv; 5156 struct object_kt key; 5157 5158 key = *((struct object_kt *)k); 5159 ntlv = (ipfw_obj_ntlv *)v; 5160 5161 if (key.uidx < ntlv->idx) 5162 return (-1); 5163 else if (key.uidx > ntlv->idx) 5164 return (1); 5165 5166 if (key.type < ntlv->head.type) 5167 return (-1); 5168 else if (key.type > ntlv->head.type) 5169 return (1); 5170 5171 return (0); 5172 } 5173 5174 /* 5175 * Finds object name in @ctlv by @idx and @type. 5176 * Uses the following facts: 5177 * 1) All TLVs are the same size 5178 * 2) Kernel implementation provides already sorted list. 5179 * 5180 * Returns table name or NULL. 5181 */ 5182 static char * 5183 object_search_ctlv(ipfw_obj_ctlv *ctlv, uint16_t idx, uint16_t type) 5184 { 5185 ipfw_obj_ntlv *ntlv; 5186 struct object_kt key; 5187 5188 key.uidx = idx; 5189 key.type = type; 5190 5191 ntlv = bsearch(&key, (ctlv + 1), ctlv->count, ctlv->objsize, 5192 compare_object_kntlv); 5193 5194 if (ntlv != NULL) 5195 return (ntlv->name); 5196 5197 return (NULL); 5198 } 5199 5200 static char * 5201 table_search_ctlv(ipfw_obj_ctlv *ctlv, uint16_t idx) 5202 { 5203 5204 return (object_search_ctlv(ctlv, idx, IPFW_TLV_TBL_NAME)); 5205 } 5206 5207 /* 5208 * Adds one or more rules to ipfw chain. 5209 * Data layout: 5210 * Request: 5211 * [ 5212 * ip_fw3_opheader 5213 * [ ipfw_obj_ctlv(IPFW_TLV_TBL_LIST) ipfw_obj_ntlv x N ] (optional *1) 5214 * [ ipfw_obj_ctlv(IPFW_TLV_RULE_LIST) [ ip_fw_rule ip_fw_insn ] x N ] (*2) (*3) 5215 * ] 5216 * Reply: 5217 * [ 5218 * ip_fw3_opheader 5219 * [ ipfw_obj_ctlv(IPFW_TLV_TBL_LIST) ipfw_obj_ntlv x N ] (optional) 5220 * [ ipfw_obj_ctlv(IPFW_TLV_RULE_LIST) [ ip_fw_rule ip_fw_insn ] x N ] 5221 * ] 5222 * 5223 * Rules in reply are modified to store their actual ruleset number. 5224 * 5225 * (*1) TLVs inside IPFW_TLV_TBL_LIST needs to be sorted ascending 5226 * according to their idx field and there has to be no duplicates. 5227 * (*2) Numbered rules inside IPFW_TLV_RULE_LIST needs to be sorted ascending. 5228 * (*3) Each ip_fw structure needs to be aligned to u64 boundary. 5229 */ 5230 void 5231 ipfw_add(char *av[]) 5232 { 5233 uint32_t rulebuf[1024]; 5234 int rbufsize, default_off, tlen, rlen; 5235 size_t sz; 5236 struct tidx ts; 5237 struct ip_fw_rule *rule; 5238 caddr_t tbuf; 5239 ip_fw3_opheader *op3; 5240 ipfw_obj_ctlv *ctlv, *tstate; 5241 5242 rbufsize = sizeof(rulebuf); 5243 memset(rulebuf, 0, rbufsize); 5244 memset(&ts, 0, sizeof(ts)); 5245 5246 /* Optimize case with no tables */ 5247 default_off = sizeof(ipfw_obj_ctlv) + sizeof(ip_fw3_opheader); 5248 op3 = (ip_fw3_opheader *)rulebuf; 5249 ctlv = (ipfw_obj_ctlv *)(op3 + 1); 5250 rule = (struct ip_fw_rule *)(ctlv + 1); 5251 rbufsize -= default_off; 5252 5253 compile_rule(av, (uint32_t *)rule, &rbufsize, &ts); 5254 /* Align rule size to u64 boundary */ 5255 rlen = roundup2(rbufsize, sizeof(uint64_t)); 5256 5257 tbuf = NULL; 5258 sz = 0; 5259 tstate = NULL; 5260 if (ts.count != 0) { 5261 /* Some tables. We have to alloc more data */ 5262 tlen = ts.count * sizeof(ipfw_obj_ntlv); 5263 sz = default_off + sizeof(ipfw_obj_ctlv) + tlen + rlen; 5264 5265 if ((tbuf = calloc(1, sz)) == NULL) 5266 err(EX_UNAVAILABLE, "malloc() failed for IP_FW_ADD"); 5267 op3 = (ip_fw3_opheader *)tbuf; 5268 /* Tables first */ 5269 ctlv = (ipfw_obj_ctlv *)(op3 + 1); 5270 ctlv->head.type = IPFW_TLV_TBLNAME_LIST; 5271 ctlv->head.length = sizeof(ipfw_obj_ctlv) + tlen; 5272 ctlv->count = ts.count; 5273 ctlv->objsize = sizeof(ipfw_obj_ntlv); 5274 memcpy(ctlv + 1, ts.idx, tlen); 5275 object_sort_ctlv(ctlv); 5276 tstate = ctlv; 5277 /* Rule next */ 5278 ctlv = (ipfw_obj_ctlv *)((caddr_t)ctlv + ctlv->head.length); 5279 ctlv->head.type = IPFW_TLV_RULE_LIST; 5280 ctlv->head.length = sizeof(ipfw_obj_ctlv) + rlen; 5281 ctlv->count = 1; 5282 memcpy(ctlv + 1, rule, rbufsize); 5283 } else { 5284 /* Simply add header */ 5285 sz = rlen + default_off; 5286 memset(ctlv, 0, sizeof(*ctlv)); 5287 ctlv->head.type = IPFW_TLV_RULE_LIST; 5288 ctlv->head.length = sizeof(ipfw_obj_ctlv) + rlen; 5289 ctlv->count = 1; 5290 } 5291 5292 if (do_get3(IP_FW_XADD, op3, &sz) != 0) 5293 err(EX_UNAVAILABLE, "getsockopt(%s)", "IP_FW_XADD"); 5294 5295 if (!co.do_quiet) { 5296 struct format_opts sfo; 5297 struct buf_pr bp; 5298 memset(&sfo, 0, sizeof(sfo)); 5299 sfo.tstate = tstate; 5300 sfo.set_mask = (uint32_t)(-1); 5301 bp_alloc(&bp, 4096); 5302 show_static_rule(&co, &sfo, &bp, rule, NULL); 5303 printf("%s", bp.buf); 5304 bp_free(&bp); 5305 } 5306 5307 if (tbuf != NULL) 5308 free(tbuf); 5309 5310 if (ts.idx != NULL) 5311 free(ts.idx); 5312 } 5313 5314 /* 5315 * clear the counters or the log counters. 5316 * optname has the following values: 5317 * 0 (zero both counters and logging) 5318 * 1 (zero logging only) 5319 */ 5320 void 5321 ipfw_zero(int ac, char *av[], int optname) 5322 { 5323 ipfw_range_tlv rt; 5324 char const *errstr; 5325 char const *name = optname ? "RESETLOG" : "ZERO"; 5326 uint32_t arg; 5327 int failed = EX_OK; 5328 5329 optname = optname ? IP_FW_XRESETLOG : IP_FW_XZERO; 5330 av++; ac--; 5331 5332 if (ac == 0) { 5333 /* clear all entries */ 5334 memset(&rt, 0, sizeof(rt)); 5335 rt.flags = IPFW_RCFLAG_ALL; 5336 if (do_range_cmd(optname, &rt) < 0) 5337 err(EX_UNAVAILABLE, "setsockopt(IP_FW_X%s)", name); 5338 if (!co.do_quiet) 5339 printf("%s.\n", optname == IP_FW_XZERO ? 5340 "Accounting cleared":"Logging counts reset"); 5341 5342 return; 5343 } 5344 5345 while (ac) { 5346 /* Rule number */ 5347 if (isdigit(**av)) { 5348 arg = strtonum(*av, 0, 0xffff, &errstr); 5349 if (errstr) 5350 errx(EX_DATAERR, 5351 "invalid rule number %s\n", *av); 5352 memset(&rt, 0, sizeof(rt)); 5353 rt.start_rule = arg; 5354 rt.end_rule = arg; 5355 rt.flags |= IPFW_RCFLAG_RANGE; 5356 if (co.use_set != 0) { 5357 rt.set = co.use_set - 1; 5358 rt.flags |= IPFW_RCFLAG_SET; 5359 } 5360 if (do_range_cmd(optname, &rt) != 0) { 5361 warn("rule %u: setsockopt(IP_FW_X%s)", 5362 arg, name); 5363 failed = EX_UNAVAILABLE; 5364 } else if (rt.new_set == 0) { 5365 printf("Entry %d not found\n", arg); 5366 failed = EX_UNAVAILABLE; 5367 } else if (!co.do_quiet) 5368 printf("Entry %d %s.\n", arg, 5369 optname == IP_FW_XZERO ? 5370 "cleared" : "logging count reset"); 5371 } else { 5372 errx(EX_USAGE, "invalid rule number ``%s''", *av); 5373 } 5374 av++; ac--; 5375 } 5376 if (failed != EX_OK) 5377 exit(failed); 5378 } 5379 5380 void 5381 ipfw_flush(int force) 5382 { 5383 ipfw_range_tlv rt; 5384 5385 if (!force && !co.do_quiet) { /* need to ask user */ 5386 int c; 5387 5388 printf("Are you sure? [yn] "); 5389 fflush(stdout); 5390 do { 5391 c = toupper(getc(stdin)); 5392 while (c != '\n' && getc(stdin) != '\n') 5393 if (feof(stdin)) 5394 return; /* and do not flush */ 5395 } while (c != 'Y' && c != 'N'); 5396 printf("\n"); 5397 if (c == 'N') /* user said no */ 5398 return; 5399 } 5400 if (co.do_pipe) { 5401 dummynet_flush(); 5402 return; 5403 } 5404 /* `ipfw set N flush` - is the same that `ipfw delete set N` */ 5405 memset(&rt, 0, sizeof(rt)); 5406 if (co.use_set != 0) { 5407 rt.set = co.use_set - 1; 5408 rt.flags = IPFW_RCFLAG_SET; 5409 } else 5410 rt.flags = IPFW_RCFLAG_ALL; 5411 if (do_range_cmd(IP_FW_XDEL, &rt) != 0) 5412 err(EX_UNAVAILABLE, "setsockopt(IP_FW_XDEL)"); 5413 if (!co.do_quiet) 5414 printf("Flushed all %s.\n", co.do_pipe ? "pipes" : "rules"); 5415 } 5416 5417 static struct _s_x intcmds[] = { 5418 { "talist", TOK_TALIST }, 5419 { "iflist", TOK_IFLIST }, 5420 { "olist", TOK_OLIST }, 5421 { "vlist", TOK_VLIST }, 5422 { NULL, 0 } 5423 }; 5424 5425 static struct _s_x otypes[] = { 5426 { "EACTION", IPFW_TLV_EACTION }, 5427 { "DYNSTATE", IPFW_TLV_STATE_NAME }, 5428 { NULL, 0 } 5429 }; 5430 5431 static const char* 5432 lookup_eaction_name(ipfw_obj_ntlv *ntlv, int cnt, uint16_t type) 5433 { 5434 const char *name; 5435 int i; 5436 5437 name = NULL; 5438 for (i = 0; i < cnt; i++) { 5439 if (ntlv[i].head.type != IPFW_TLV_EACTION) 5440 continue; 5441 if (IPFW_TLV_EACTION_NAME(ntlv[i].idx) != type) 5442 continue; 5443 name = ntlv[i].name; 5444 break; 5445 } 5446 return (name); 5447 } 5448 5449 static void 5450 ipfw_list_objects(int ac, char *av[]) 5451 { 5452 ipfw_obj_lheader req, *olh; 5453 ipfw_obj_ntlv *ntlv; 5454 const char *name; 5455 size_t sz; 5456 int i; 5457 5458 memset(&req, 0, sizeof(req)); 5459 sz = sizeof(req); 5460 if (do_get3(IP_FW_DUMP_SRVOBJECTS, &req.opheader, &sz) != 0) 5461 if (errno != ENOMEM) 5462 return; 5463 5464 sz = req.size; 5465 if ((olh = calloc(1, sz)) == NULL) 5466 return; 5467 5468 olh->size = sz; 5469 if (do_get3(IP_FW_DUMP_SRVOBJECTS, &olh->opheader, &sz) != 0) { 5470 free(olh); 5471 return; 5472 } 5473 5474 if (olh->count > 0) 5475 printf("Objects list:\n"); 5476 else 5477 printf("There are no objects\n"); 5478 ntlv = (ipfw_obj_ntlv *)(olh + 1); 5479 for (i = 0; i < olh->count; i++) { 5480 name = match_value(otypes, ntlv->head.type); 5481 if (name == NULL) 5482 name = lookup_eaction_name( 5483 (ipfw_obj_ntlv *)(olh + 1), olh->count, 5484 ntlv->head.type); 5485 if (name == NULL) 5486 printf(" kidx: %4d\ttype: %10d\tname: %s\n", 5487 ntlv->idx, ntlv->head.type, ntlv->name); 5488 else 5489 printf(" kidx: %4d\ttype: %10s\tname: %s\n", 5490 ntlv->idx, name, ntlv->name); 5491 ntlv++; 5492 } 5493 free(olh); 5494 } 5495 5496 void 5497 ipfw_internal_handler(int ac, char *av[]) 5498 { 5499 int tcmd; 5500 5501 ac--; av++; 5502 NEED1("internal cmd required"); 5503 5504 if ((tcmd = match_token(intcmds, *av)) == -1) 5505 errx(EX_USAGE, "invalid internal sub-cmd: %s", *av); 5506 5507 switch (tcmd) { 5508 case TOK_IFLIST: 5509 ipfw_list_tifaces(); 5510 break; 5511 case TOK_TALIST: 5512 ipfw_list_ta(ac, av); 5513 break; 5514 case TOK_OLIST: 5515 ipfw_list_objects(ac, av); 5516 break; 5517 case TOK_VLIST: 5518 ipfw_list_values(ac, av); 5519 break; 5520 } 5521 } 5522 5523 static int 5524 ipfw_get_tracked_ifaces(ipfw_obj_lheader **polh) 5525 { 5526 ipfw_obj_lheader req, *olh; 5527 size_t sz; 5528 5529 memset(&req, 0, sizeof(req)); 5530 sz = sizeof(req); 5531 5532 if (do_get3(IP_FW_XIFLIST, &req.opheader, &sz) != 0) { 5533 if (errno != ENOMEM) 5534 return (errno); 5535 } 5536 5537 sz = req.size; 5538 if ((olh = calloc(1, sz)) == NULL) 5539 return (ENOMEM); 5540 5541 olh->size = sz; 5542 if (do_get3(IP_FW_XIFLIST, &olh->opheader, &sz) != 0) { 5543 free(olh); 5544 return (errno); 5545 } 5546 5547 *polh = olh; 5548 return (0); 5549 } 5550 5551 static int 5552 ifinfo_cmp(const void *a, const void *b) 5553 { 5554 ipfw_iface_info *ia, *ib; 5555 5556 ia = (ipfw_iface_info *)a; 5557 ib = (ipfw_iface_info *)b; 5558 5559 return (stringnum_cmp(ia->ifname, ib->ifname)); 5560 } 5561 5562 /* 5563 * Retrieves table list from kernel, 5564 * optionally sorts it and calls requested function for each table. 5565 * Returns 0 on success. 5566 */ 5567 static void 5568 ipfw_list_tifaces() 5569 { 5570 ipfw_obj_lheader *olh; 5571 ipfw_iface_info *info; 5572 int i, error; 5573 5574 if ((error = ipfw_get_tracked_ifaces(&olh)) != 0) 5575 err(EX_OSERR, "Unable to request ipfw tracked interface list"); 5576 5577 5578 qsort(olh + 1, olh->count, olh->objsize, ifinfo_cmp); 5579 5580 info = (ipfw_iface_info *)(olh + 1); 5581 for (i = 0; i < olh->count; i++) { 5582 if (info->flags & IPFW_IFFLAG_RESOLVED) 5583 printf("%s ifindex: %d refcount: %u changes: %u\n", 5584 info->ifname, info->ifindex, info->refcnt, 5585 info->gencnt); 5586 else 5587 printf("%s ifindex: unresolved refcount: %u changes: %u\n", 5588 info->ifname, info->refcnt, info->gencnt); 5589 info = (ipfw_iface_info *)((caddr_t)info + olh->objsize); 5590 } 5591 5592 free(olh); 5593 } 5594 5595 5596 5597 5598