1 /*- 2 * Copyright (c) 2002-2003 Luigi Rizzo 3 * Copyright (c) 1996 Alex Nash, Paul Traina, Poul-Henning Kamp 4 * Copyright (c) 1994 Ugen J.S.Antsilevich 5 * 6 * Idea and grammar partially left from: 7 * Copyright (c) 1993 Daniel Boulet 8 * 9 * Redistribution and use in source forms, with and without modification, 10 * are permitted provided that this entire comment appears intact. 11 * 12 * Redistribution in binary form may occur without any restrictions. 13 * Obviously, it would be nice if you gave credit where credit is due 14 * but requiring it would be too onerous. 15 * 16 * This software is provided ``AS IS'' without any warranties of any kind. 17 * 18 * NEW command line interface for IP firewall facility 19 * 20 * $FreeBSD$ 21 */ 22 23 #include <sys/types.h> 24 #include <sys/param.h> 25 #include <sys/socket.h> 26 #include <sys/sockio.h> 27 #include <sys/sysctl.h> 28 29 #include "ipfw2.h" 30 31 #include <ctype.h> 32 #include <err.h> 33 #include <errno.h> 34 #include <grp.h> 35 #include <jail.h> 36 #include <netdb.h> 37 #include <pwd.h> 38 #include <stdio.h> 39 #include <stdarg.h> 40 #include <stdint.h> 41 #include <stdlib.h> 42 #include <string.h> 43 #include <sysexits.h> 44 #include <time.h> /* ctime */ 45 #include <timeconv.h> /* _long_to_time */ 46 #include <unistd.h> 47 #include <fcntl.h> 48 #include <stddef.h> /* offsetof */ 49 50 #include <net/ethernet.h> 51 #include <net/if.h> /* only IFNAMSIZ */ 52 #include <netinet/in.h> 53 #include <netinet/in_systm.h> /* only n_short, n_long */ 54 #include <netinet/ip.h> 55 #include <netinet/ip_icmp.h> 56 #include <netinet/ip_fw.h> 57 #include <netinet/tcp.h> 58 #include <arpa/inet.h> 59 60 struct cmdline_opts co; /* global options */ 61 62 struct format_opts { 63 int bcwidth; 64 int pcwidth; 65 int show_counters; 66 int show_time; /* show timestamp */ 67 uint32_t set_mask; /* enabled sets mask */ 68 uint32_t flags; /* request flags */ 69 uint32_t first; /* first rule to request */ 70 uint32_t last; /* last rule to request */ 71 uint32_t dcnt; /* number of dynamic states */ 72 ipfw_obj_ctlv *tstate; /* table state data */ 73 }; 74 75 int resvd_set_number = RESVD_SET; 76 77 int ipfw_socket = -1; 78 79 #define CHECK_LENGTH(v, len) do { \ 80 if ((v) < (len)) \ 81 errx(EX_DATAERR, "Rule too long"); \ 82 } while (0) 83 /* 84 * Check if we have enough space in cmd buffer. Note that since 85 * first 8? u32 words are reserved by reserved header, full cmd 86 * buffer can't be used, so we need to protect from buffer overrun 87 * only. At the beginning, cblen is less than actual buffer size by 88 * size of ipfw_insn_u32 instruction + 1 u32 work. This eliminates need 89 * for checking small instructions fitting in given range. 90 * We also (ab)use the fact that ipfw_insn is always the first field 91 * for any custom instruction. 92 */ 93 #define CHECK_CMDLEN CHECK_LENGTH(cblen, F_LEN((ipfw_insn *)cmd)) 94 95 #define GET_UINT_ARG(arg, min, max, tok, s_x) do { \ 96 if (!av[0]) \ 97 errx(EX_USAGE, "%s: missing argument", match_value(s_x, tok)); \ 98 if (_substrcmp(*av, "tablearg") == 0) { \ 99 arg = IP_FW_TARG; \ 100 break; \ 101 } \ 102 \ 103 { \ 104 long _xval; \ 105 char *end; \ 106 \ 107 _xval = strtol(*av, &end, 10); \ 108 \ 109 if (!isdigit(**av) || *end != '\0' || (_xval == 0 && errno == EINVAL)) \ 110 errx(EX_DATAERR, "%s: invalid argument: %s", \ 111 match_value(s_x, tok), *av); \ 112 \ 113 if (errno == ERANGE || _xval < min || _xval > max) \ 114 errx(EX_DATAERR, "%s: argument is out of range (%u..%u): %s", \ 115 match_value(s_x, tok), min, max, *av); \ 116 \ 117 if (_xval == IP_FW_TARG) \ 118 errx(EX_DATAERR, "%s: illegal argument value: %s", \ 119 match_value(s_x, tok), *av); \ 120 arg = _xval; \ 121 } \ 122 } while (0) 123 124 static struct _s_x f_tcpflags[] = { 125 { "syn", TH_SYN }, 126 { "fin", TH_FIN }, 127 { "ack", TH_ACK }, 128 { "psh", TH_PUSH }, 129 { "rst", TH_RST }, 130 { "urg", TH_URG }, 131 { "tcp flag", 0 }, 132 { NULL, 0 } 133 }; 134 135 static struct _s_x f_tcpopts[] = { 136 { "mss", IP_FW_TCPOPT_MSS }, 137 { "maxseg", IP_FW_TCPOPT_MSS }, 138 { "window", IP_FW_TCPOPT_WINDOW }, 139 { "sack", IP_FW_TCPOPT_SACK }, 140 { "ts", IP_FW_TCPOPT_TS }, 141 { "timestamp", IP_FW_TCPOPT_TS }, 142 { "cc", IP_FW_TCPOPT_CC }, 143 { "tcp option", 0 }, 144 { NULL, 0 } 145 }; 146 147 /* 148 * IP options span the range 0 to 255 so we need to remap them 149 * (though in fact only the low 5 bits are significant). 150 */ 151 static struct _s_x f_ipopts[] = { 152 { "ssrr", IP_FW_IPOPT_SSRR}, 153 { "lsrr", IP_FW_IPOPT_LSRR}, 154 { "rr", IP_FW_IPOPT_RR}, 155 { "ts", IP_FW_IPOPT_TS}, 156 { "ip option", 0 }, 157 { NULL, 0 } 158 }; 159 160 static struct _s_x f_iptos[] = { 161 { "lowdelay", IPTOS_LOWDELAY}, 162 { "throughput", IPTOS_THROUGHPUT}, 163 { "reliability", IPTOS_RELIABILITY}, 164 { "mincost", IPTOS_MINCOST}, 165 { "congestion", IPTOS_ECN_CE}, 166 { "ecntransport", IPTOS_ECN_ECT0}, 167 { "ip tos option", 0}, 168 { NULL, 0 } 169 }; 170 171 struct _s_x f_ipdscp[] = { 172 { "af11", IPTOS_DSCP_AF11 >> 2 }, /* 001010 */ 173 { "af12", IPTOS_DSCP_AF12 >> 2 }, /* 001100 */ 174 { "af13", IPTOS_DSCP_AF13 >> 2 }, /* 001110 */ 175 { "af21", IPTOS_DSCP_AF21 >> 2 }, /* 010010 */ 176 { "af22", IPTOS_DSCP_AF22 >> 2 }, /* 010100 */ 177 { "af23", IPTOS_DSCP_AF23 >> 2 }, /* 010110 */ 178 { "af31", IPTOS_DSCP_AF31 >> 2 }, /* 011010 */ 179 { "af32", IPTOS_DSCP_AF32 >> 2 }, /* 011100 */ 180 { "af33", IPTOS_DSCP_AF33 >> 2 }, /* 011110 */ 181 { "af41", IPTOS_DSCP_AF41 >> 2 }, /* 100010 */ 182 { "af42", IPTOS_DSCP_AF42 >> 2 }, /* 100100 */ 183 { "af43", IPTOS_DSCP_AF43 >> 2 }, /* 100110 */ 184 { "be", IPTOS_DSCP_CS0 >> 2 }, /* 000000 */ 185 { "ef", IPTOS_DSCP_EF >> 2 }, /* 101110 */ 186 { "cs0", IPTOS_DSCP_CS0 >> 2 }, /* 000000 */ 187 { "cs1", IPTOS_DSCP_CS1 >> 2 }, /* 001000 */ 188 { "cs2", IPTOS_DSCP_CS2 >> 2 }, /* 010000 */ 189 { "cs3", IPTOS_DSCP_CS3 >> 2 }, /* 011000 */ 190 { "cs4", IPTOS_DSCP_CS4 >> 2 }, /* 100000 */ 191 { "cs5", IPTOS_DSCP_CS5 >> 2 }, /* 101000 */ 192 { "cs6", IPTOS_DSCP_CS6 >> 2 }, /* 110000 */ 193 { "cs7", IPTOS_DSCP_CS7 >> 2 }, /* 100000 */ 194 { NULL, 0 } 195 }; 196 197 static struct _s_x limit_masks[] = { 198 {"all", DYN_SRC_ADDR|DYN_SRC_PORT|DYN_DST_ADDR|DYN_DST_PORT}, 199 {"src-addr", DYN_SRC_ADDR}, 200 {"src-port", DYN_SRC_PORT}, 201 {"dst-addr", DYN_DST_ADDR}, 202 {"dst-port", DYN_DST_PORT}, 203 {NULL, 0} 204 }; 205 206 /* 207 * we use IPPROTO_ETHERTYPE as a fake protocol id to call the print routines 208 * This is only used in this code. 209 */ 210 #define IPPROTO_ETHERTYPE 0x1000 211 static struct _s_x ether_types[] = { 212 /* 213 * Note, we cannot use "-:&/" in the names because they are field 214 * separators in the type specifications. Also, we use s = NULL as 215 * end-delimiter, because a type of 0 can be legal. 216 */ 217 { "ip", 0x0800 }, 218 { "ipv4", 0x0800 }, 219 { "ipv6", 0x86dd }, 220 { "arp", 0x0806 }, 221 { "rarp", 0x8035 }, 222 { "vlan", 0x8100 }, 223 { "loop", 0x9000 }, 224 { "trail", 0x1000 }, 225 { "at", 0x809b }, 226 { "atalk", 0x809b }, 227 { "aarp", 0x80f3 }, 228 { "pppoe_disc", 0x8863 }, 229 { "pppoe_sess", 0x8864 }, 230 { "ipx_8022", 0x00E0 }, 231 { "ipx_8023", 0x0000 }, 232 { "ipx_ii", 0x8137 }, 233 { "ipx_snap", 0x8137 }, 234 { "ipx", 0x8137 }, 235 { "ns", 0x0600 }, 236 { NULL, 0 } 237 }; 238 239 static struct _s_x rule_eactions[] = { 240 { "nat64clat", TOK_NAT64CLAT }, 241 { "nat64lsn", TOK_NAT64LSN }, 242 { "nat64stl", TOK_NAT64STL }, 243 { "nptv6", TOK_NPTV6 }, 244 { "tcp-setmss", TOK_TCPSETMSS }, 245 { NULL, 0 } /* terminator */ 246 }; 247 248 static struct _s_x rule_actions[] = { 249 { "abort6", TOK_ABORT6 }, 250 { "abort", TOK_ABORT }, 251 { "accept", TOK_ACCEPT }, 252 { "pass", TOK_ACCEPT }, 253 { "allow", TOK_ACCEPT }, 254 { "permit", TOK_ACCEPT }, 255 { "count", TOK_COUNT }, 256 { "pipe", TOK_PIPE }, 257 { "queue", TOK_QUEUE }, 258 { "divert", TOK_DIVERT }, 259 { "tee", TOK_TEE }, 260 { "netgraph", TOK_NETGRAPH }, 261 { "ngtee", TOK_NGTEE }, 262 { "fwd", TOK_FORWARD }, 263 { "forward", TOK_FORWARD }, 264 { "skipto", TOK_SKIPTO }, 265 { "deny", TOK_DENY }, 266 { "drop", TOK_DENY }, 267 { "reject", TOK_REJECT }, 268 { "reset6", TOK_RESET6 }, 269 { "reset", TOK_RESET }, 270 { "unreach6", TOK_UNREACH6 }, 271 { "unreach", TOK_UNREACH }, 272 { "check-state", TOK_CHECKSTATE }, 273 { "//", TOK_COMMENT }, 274 { "nat", TOK_NAT }, 275 { "reass", TOK_REASS }, 276 { "setfib", TOK_SETFIB }, 277 { "setdscp", TOK_SETDSCP }, 278 { "call", TOK_CALL }, 279 { "return", TOK_RETURN }, 280 { "eaction", TOK_EACTION }, 281 { "tcp-setmss", TOK_TCPSETMSS }, 282 { NULL, 0 } /* terminator */ 283 }; 284 285 static struct _s_x rule_action_params[] = { 286 { "altq", TOK_ALTQ }, 287 { "log", TOK_LOG }, 288 { "tag", TOK_TAG }, 289 { "untag", TOK_UNTAG }, 290 { NULL, 0 } /* terminator */ 291 }; 292 293 /* 294 * The 'lookup' instruction accepts one of the following arguments. 295 * -1 is a terminator for the list. 296 * Arguments are passed as v[1] in O_DST_LOOKUP options. 297 */ 298 static int lookup_key[] = { 299 TOK_DSTIP, TOK_SRCIP, TOK_DSTPORT, TOK_SRCPORT, 300 TOK_UID, TOK_JAIL, TOK_DSCP, -1 }; 301 302 static struct _s_x rule_options[] = { 303 { "tagged", TOK_TAGGED }, 304 { "uid", TOK_UID }, 305 { "gid", TOK_GID }, 306 { "jail", TOK_JAIL }, 307 { "in", TOK_IN }, 308 { "limit", TOK_LIMIT }, 309 { "set-limit", TOK_SETLIMIT }, 310 { "keep-state", TOK_KEEPSTATE }, 311 { "record-state", TOK_RECORDSTATE }, 312 { "bridged", TOK_LAYER2 }, 313 { "layer2", TOK_LAYER2 }, 314 { "out", TOK_OUT }, 315 { "diverted", TOK_DIVERTED }, 316 { "diverted-loopback", TOK_DIVERTEDLOOPBACK }, 317 { "diverted-output", TOK_DIVERTEDOUTPUT }, 318 { "xmit", TOK_XMIT }, 319 { "recv", TOK_RECV }, 320 { "via", TOK_VIA }, 321 { "fragment", TOK_FRAG }, 322 { "frag", TOK_FRAG }, 323 { "fib", TOK_FIB }, 324 { "ipoptions", TOK_IPOPTS }, 325 { "ipopts", TOK_IPOPTS }, 326 { "iplen", TOK_IPLEN }, 327 { "ipid", TOK_IPID }, 328 { "ipprecedence", TOK_IPPRECEDENCE }, 329 { "dscp", TOK_DSCP }, 330 { "iptos", TOK_IPTOS }, 331 { "ipttl", TOK_IPTTL }, 332 { "ipversion", TOK_IPVER }, 333 { "ipver", TOK_IPVER }, 334 { "estab", TOK_ESTAB }, 335 { "established", TOK_ESTAB }, 336 { "setup", TOK_SETUP }, 337 { "sockarg", TOK_SOCKARG }, 338 { "tcpdatalen", TOK_TCPDATALEN }, 339 { "tcpflags", TOK_TCPFLAGS }, 340 { "tcpflgs", TOK_TCPFLAGS }, 341 { "tcpoptions", TOK_TCPOPTS }, 342 { "tcpopts", TOK_TCPOPTS }, 343 { "tcpseq", TOK_TCPSEQ }, 344 { "tcpack", TOK_TCPACK }, 345 { "tcpwin", TOK_TCPWIN }, 346 { "icmptype", TOK_ICMPTYPES }, 347 { "icmptypes", TOK_ICMPTYPES }, 348 { "dst-ip", TOK_DSTIP }, 349 { "src-ip", TOK_SRCIP }, 350 { "dst-port", TOK_DSTPORT }, 351 { "src-port", TOK_SRCPORT }, 352 { "proto", TOK_PROTO }, 353 { "MAC", TOK_MAC }, 354 { "mac", TOK_MAC }, 355 { "mac-type", TOK_MACTYPE }, 356 { "verrevpath", TOK_VERREVPATH }, 357 { "versrcreach", TOK_VERSRCREACH }, 358 { "antispoof", TOK_ANTISPOOF }, 359 { "ipsec", TOK_IPSEC }, 360 { "icmp6type", TOK_ICMP6TYPES }, 361 { "icmp6types", TOK_ICMP6TYPES }, 362 { "ext6hdr", TOK_EXT6HDR}, 363 { "flow-id", TOK_FLOWID}, 364 { "ipv6", TOK_IPV6}, 365 { "ip6", TOK_IPV6}, 366 { "ipv4", TOK_IPV4}, 367 { "ip4", TOK_IPV4}, 368 { "dst-ipv6", TOK_DSTIP6}, 369 { "dst-ip6", TOK_DSTIP6}, 370 { "src-ipv6", TOK_SRCIP6}, 371 { "src-ip6", TOK_SRCIP6}, 372 { "lookup", TOK_LOOKUP}, 373 { "flow", TOK_FLOW}, 374 { "defer-action", TOK_SKIPACTION }, 375 { "defer-immediate-action", TOK_SKIPACTION }, 376 { "//", TOK_COMMENT }, 377 378 { "not", TOK_NOT }, /* pseudo option */ 379 { "!", /* escape ? */ TOK_NOT }, /* pseudo option */ 380 { "or", TOK_OR }, /* pseudo option */ 381 { "|", /* escape */ TOK_OR }, /* pseudo option */ 382 { "{", TOK_STARTBRACE }, /* pseudo option */ 383 { "(", TOK_STARTBRACE }, /* pseudo option */ 384 { "}", TOK_ENDBRACE }, /* pseudo option */ 385 { ")", TOK_ENDBRACE }, /* pseudo option */ 386 { NULL, 0 } /* terminator */ 387 }; 388 389 void bprint_uint_arg(struct buf_pr *bp, const char *str, uint32_t arg); 390 static int ipfw_get_config(struct cmdline_opts *co, struct format_opts *fo, 391 ipfw_cfg_lheader **pcfg, size_t *psize); 392 static int ipfw_show_config(struct cmdline_opts *co, struct format_opts *fo, 393 ipfw_cfg_lheader *cfg, size_t sz, int ac, char **av); 394 static void ipfw_list_tifaces(void); 395 396 struct tidx; 397 static uint16_t pack_object(struct tidx *tstate, char *name, int otype); 398 static uint16_t pack_table(struct tidx *tstate, char *name); 399 400 static char *table_search_ctlv(ipfw_obj_ctlv *ctlv, uint16_t idx); 401 static void object_sort_ctlv(ipfw_obj_ctlv *ctlv); 402 static char *object_search_ctlv(ipfw_obj_ctlv *ctlv, uint16_t idx, 403 uint16_t type); 404 405 /* 406 * Simple string buffer API. 407 * Used to simplify buffer passing between function and for 408 * transparent overrun handling. 409 */ 410 411 /* 412 * Allocates new buffer of given size @sz. 413 * 414 * Returns 0 on success. 415 */ 416 int 417 bp_alloc(struct buf_pr *b, size_t size) 418 { 419 memset(b, 0, sizeof(struct buf_pr)); 420 421 if ((b->buf = calloc(1, size)) == NULL) 422 return (ENOMEM); 423 424 b->ptr = b->buf; 425 b->size = size; 426 b->avail = b->size; 427 428 return (0); 429 } 430 431 void 432 bp_free(struct buf_pr *b) 433 { 434 435 free(b->buf); 436 } 437 438 /* 439 * Flushes buffer so new writer start from beginning. 440 */ 441 void 442 bp_flush(struct buf_pr *b) 443 { 444 445 b->ptr = b->buf; 446 b->avail = b->size; 447 b->buf[0] = '\0'; 448 } 449 450 /* 451 * Print message specified by @format and args. 452 * Automatically manage buffer space and transparently handle 453 * buffer overruns. 454 * 455 * Returns number of bytes that should have been printed. 456 */ 457 int 458 bprintf(struct buf_pr *b, char *format, ...) 459 { 460 va_list args; 461 int i; 462 463 va_start(args, format); 464 465 i = vsnprintf(b->ptr, b->avail, format, args); 466 va_end(args); 467 468 if (i > b->avail || i < 0) { 469 /* Overflow or print error */ 470 b->avail = 0; 471 } else { 472 b->ptr += i; 473 b->avail -= i; 474 } 475 476 b->needed += i; 477 478 return (i); 479 } 480 481 /* 482 * Special values printer for tablearg-aware opcodes. 483 */ 484 void 485 bprint_uint_arg(struct buf_pr *bp, const char *str, uint32_t arg) 486 { 487 488 if (str != NULL) 489 bprintf(bp, "%s", str); 490 if (arg == IP_FW_TARG) 491 bprintf(bp, "tablearg"); 492 else 493 bprintf(bp, "%u", arg); 494 } 495 496 /* 497 * Helper routine to print a possibly unaligned uint64_t on 498 * various platform. If width > 0, print the value with 499 * the desired width, followed by a space; 500 * otherwise, return the required width. 501 */ 502 int 503 pr_u64(struct buf_pr *b, uint64_t *pd, int width) 504 { 505 #ifdef TCC 506 #define U64_FMT "I64" 507 #else 508 #define U64_FMT "llu" 509 #endif 510 uint64_t u; 511 unsigned long long d; 512 513 bcopy (pd, &u, sizeof(u)); 514 d = u; 515 return (width > 0) ? 516 bprintf(b, "%*" U64_FMT " ", width, d) : 517 snprintf(NULL, 0, "%" U64_FMT, d) ; 518 #undef U64_FMT 519 } 520 521 522 void * 523 safe_calloc(size_t number, size_t size) 524 { 525 void *ret = calloc(number, size); 526 527 if (ret == NULL) 528 err(EX_OSERR, "calloc"); 529 return ret; 530 } 531 532 void * 533 safe_realloc(void *ptr, size_t size) 534 { 535 void *ret = realloc(ptr, size); 536 537 if (ret == NULL) 538 err(EX_OSERR, "realloc"); 539 return ret; 540 } 541 542 /* 543 * Compare things like interface or table names. 544 */ 545 int 546 stringnum_cmp(const char *a, const char *b) 547 { 548 int la, lb; 549 550 la = strlen(a); 551 lb = strlen(b); 552 553 if (la > lb) 554 return (1); 555 else if (la < lb) 556 return (-01); 557 558 return (strcmp(a, b)); 559 } 560 561 562 /* 563 * conditionally runs the command. 564 * Selected options or negative -> getsockopt 565 */ 566 int 567 do_cmd(int optname, void *optval, uintptr_t optlen) 568 { 569 int i; 570 571 if (co.test_only) 572 return 0; 573 574 if (ipfw_socket == -1) 575 ipfw_socket = socket(AF_INET, SOCK_RAW, IPPROTO_RAW); 576 if (ipfw_socket < 0) 577 err(EX_UNAVAILABLE, "socket"); 578 579 if (optname == IP_FW_GET || optname == IP_DUMMYNET_GET || 580 optname == IP_FW_ADD || optname == IP_FW3 || 581 optname == IP_FW_NAT_GET_CONFIG || 582 optname < 0 || 583 optname == IP_FW_NAT_GET_LOG) { 584 if (optname < 0) 585 optname = -optname; 586 i = getsockopt(ipfw_socket, IPPROTO_IP, optname, optval, 587 (socklen_t *)optlen); 588 } else { 589 i = setsockopt(ipfw_socket, IPPROTO_IP, optname, optval, optlen); 590 } 591 return i; 592 } 593 594 /* 595 * do_set3 - pass ipfw control cmd to kernel 596 * @optname: option name 597 * @optval: pointer to option data 598 * @optlen: option length 599 * 600 * Assumes op3 header is already embedded. 601 * Calls setsockopt() with IP_FW3 as kernel-visible opcode. 602 * Returns 0 on success or errno otherwise. 603 */ 604 int 605 do_set3(int optname, ip_fw3_opheader *op3, size_t optlen) 606 { 607 608 if (co.test_only) 609 return (0); 610 611 if (ipfw_socket == -1) 612 ipfw_socket = socket(AF_INET, SOCK_RAW, IPPROTO_RAW); 613 if (ipfw_socket < 0) 614 err(EX_UNAVAILABLE, "socket"); 615 616 op3->opcode = optname; 617 618 return (setsockopt(ipfw_socket, IPPROTO_IP, IP_FW3, op3, optlen)); 619 } 620 621 /* 622 * do_get3 - pass ipfw control cmd to kernel 623 * @optname: option name 624 * @optval: pointer to option data 625 * @optlen: pointer to option length 626 * 627 * Assumes op3 header is already embedded. 628 * Calls getsockopt() with IP_FW3 as kernel-visible opcode. 629 * Returns 0 on success or errno otherwise. 630 */ 631 int 632 do_get3(int optname, ip_fw3_opheader *op3, size_t *optlen) 633 { 634 int error; 635 socklen_t len; 636 637 if (co.test_only) 638 return (0); 639 640 if (ipfw_socket == -1) 641 ipfw_socket = socket(AF_INET, SOCK_RAW, IPPROTO_RAW); 642 if (ipfw_socket < 0) 643 err(EX_UNAVAILABLE, "socket"); 644 645 op3->opcode = optname; 646 647 len = *optlen; 648 error = getsockopt(ipfw_socket, IPPROTO_IP, IP_FW3, op3, &len); 649 *optlen = len; 650 651 return (error); 652 } 653 654 /** 655 * match_token takes a table and a string, returns the value associated 656 * with the string (-1 in case of failure). 657 */ 658 int 659 match_token(struct _s_x *table, const char *string) 660 { 661 struct _s_x *pt; 662 uint i = strlen(string); 663 664 for (pt = table ; i && pt->s != NULL ; pt++) 665 if (strlen(pt->s) == i && !bcmp(string, pt->s, i)) 666 return pt->x; 667 return (-1); 668 } 669 670 /** 671 * match_token_relaxed takes a table and a string, returns the value associated 672 * with the string for the best match. 673 * 674 * Returns: 675 * value from @table for matched records 676 * -1 for non-matched records 677 * -2 if more than one records match @string. 678 */ 679 int 680 match_token_relaxed(struct _s_x *table, const char *string) 681 { 682 struct _s_x *pt, *m; 683 int i, c; 684 685 i = strlen(string); 686 c = 0; 687 688 for (pt = table ; i != 0 && pt->s != NULL ; pt++) { 689 if (strncmp(pt->s, string, i) != 0) 690 continue; 691 m = pt; 692 c++; 693 } 694 695 if (c == 1) 696 return (m->x); 697 698 return (c > 0 ? -2: -1); 699 } 700 701 int 702 get_token(struct _s_x *table, const char *string, const char *errbase) 703 { 704 int tcmd; 705 706 if ((tcmd = match_token_relaxed(table, string)) < 0) 707 errx(EX_USAGE, "%s %s %s", 708 (tcmd == 0) ? "invalid" : "ambiguous", errbase, string); 709 710 return (tcmd); 711 } 712 713 /** 714 * match_value takes a table and a value, returns the string associated 715 * with the value (NULL in case of failure). 716 */ 717 char const * 718 match_value(struct _s_x *p, int value) 719 { 720 for (; p->s != NULL; p++) 721 if (p->x == value) 722 return p->s; 723 return NULL; 724 } 725 726 size_t 727 concat_tokens(char *buf, size_t bufsize, struct _s_x *table, char *delimiter) 728 { 729 struct _s_x *pt; 730 int l; 731 size_t sz; 732 733 for (sz = 0, pt = table ; pt->s != NULL; pt++) { 734 l = snprintf(buf + sz, bufsize - sz, "%s%s", 735 (sz == 0) ? "" : delimiter, pt->s); 736 sz += l; 737 bufsize += l; 738 if (sz > bufsize) 739 return (bufsize); 740 } 741 742 return (sz); 743 } 744 745 /* 746 * helper function to process a set of flags and set bits in the 747 * appropriate masks. 748 */ 749 int 750 fill_flags(struct _s_x *flags, char *p, char **e, uint32_t *set, 751 uint32_t *clear) 752 { 753 char *q; /* points to the separator */ 754 int val; 755 uint32_t *which; /* mask we are working on */ 756 757 while (p && *p) { 758 if (*p == '!') { 759 p++; 760 which = clear; 761 } else 762 which = set; 763 q = strchr(p, ','); 764 if (q) 765 *q++ = '\0'; 766 val = match_token(flags, p); 767 if (val <= 0) { 768 if (e != NULL) 769 *e = p; 770 return (-1); 771 } 772 *which |= (uint32_t)val; 773 p = q; 774 } 775 return (0); 776 } 777 778 void 779 print_flags_buffer(char *buf, size_t sz, struct _s_x *list, uint32_t set) 780 { 781 char const *comma = ""; 782 int i, l; 783 784 for (i = 0; list[i].x != 0; i++) { 785 if ((set & list[i].x) == 0) 786 continue; 787 788 set &= ~list[i].x; 789 l = snprintf(buf, sz, "%s%s", comma, list[i].s); 790 if (l >= sz) 791 return; 792 comma = ","; 793 buf += l; 794 sz -=l; 795 } 796 } 797 798 /* 799 * _substrcmp takes two strings and returns 1 if they do not match, 800 * and 0 if they match exactly or the first string is a sub-string 801 * of the second. A warning is printed to stderr in the case that the 802 * first string is a sub-string of the second. 803 * 804 * This function will be removed in the future through the usual 805 * deprecation process. 806 */ 807 int 808 _substrcmp(const char *str1, const char* str2) 809 { 810 811 if (strncmp(str1, str2, strlen(str1)) != 0) 812 return 1; 813 814 if (strlen(str1) != strlen(str2)) 815 warnx("DEPRECATED: '%s' matched '%s' as a sub-string", 816 str1, str2); 817 return 0; 818 } 819 820 /* 821 * _substrcmp2 takes three strings and returns 1 if the first two do not match, 822 * and 0 if they match exactly or the second string is a sub-string 823 * of the first. A warning is printed to stderr in the case that the 824 * first string does not match the third. 825 * 826 * This function exists to warn about the bizarre construction 827 * strncmp(str, "by", 2) which is used to allow people to use a shortcut 828 * for "bytes". The problem is that in addition to accepting "by", 829 * "byt", "byte", and "bytes", it also excepts "by_rabid_dogs" and any 830 * other string beginning with "by". 831 * 832 * This function will be removed in the future through the usual 833 * deprecation process. 834 */ 835 int 836 _substrcmp2(const char *str1, const char* str2, const char* str3) 837 { 838 839 if (strncmp(str1, str2, strlen(str2)) != 0) 840 return 1; 841 842 if (strcmp(str1, str3) != 0) 843 warnx("DEPRECATED: '%s' matched '%s'", 844 str1, str3); 845 return 0; 846 } 847 848 /* 849 * prints one port, symbolic or numeric 850 */ 851 static void 852 print_port(struct buf_pr *bp, int proto, uint16_t port) 853 { 854 855 if (proto == IPPROTO_ETHERTYPE) { 856 char const *s; 857 858 if (co.do_resolv && (s = match_value(ether_types, port)) ) 859 bprintf(bp, "%s", s); 860 else 861 bprintf(bp, "0x%04x", port); 862 } else { 863 struct servent *se = NULL; 864 if (co.do_resolv) { 865 struct protoent *pe = getprotobynumber(proto); 866 867 se = getservbyport(htons(port), pe ? pe->p_name : NULL); 868 } 869 if (se) 870 bprintf(bp, "%s", se->s_name); 871 else 872 bprintf(bp, "%d", port); 873 } 874 } 875 876 static struct _s_x _port_name[] = { 877 {"dst-port", O_IP_DSTPORT}, 878 {"src-port", O_IP_SRCPORT}, 879 {"ipid", O_IPID}, 880 {"iplen", O_IPLEN}, 881 {"ipttl", O_IPTTL}, 882 {"mac-type", O_MAC_TYPE}, 883 {"tcpdatalen", O_TCPDATALEN}, 884 {"tcpwin", O_TCPWIN}, 885 {"tagged", O_TAGGED}, 886 {NULL, 0} 887 }; 888 889 /* 890 * Print the values in a list 16-bit items of the types above. 891 * XXX todo: add support for mask. 892 */ 893 static void 894 print_newports(struct buf_pr *bp, ipfw_insn_u16 *cmd, int proto, int opcode) 895 { 896 uint16_t *p = cmd->ports; 897 int i; 898 char const *sep; 899 900 if (opcode != 0) { 901 sep = match_value(_port_name, opcode); 902 if (sep == NULL) 903 sep = "???"; 904 bprintf(bp, " %s", sep); 905 } 906 sep = " "; 907 for (i = F_LEN((ipfw_insn *)cmd) - 1; i > 0; i--, p += 2) { 908 bprintf(bp, "%s", sep); 909 print_port(bp, proto, p[0]); 910 if (p[0] != p[1]) { 911 bprintf(bp, "-"); 912 print_port(bp, proto, p[1]); 913 } 914 sep = ","; 915 } 916 } 917 918 /* 919 * Like strtol, but also translates service names into port numbers 920 * for some protocols. 921 * In particular: 922 * proto == -1 disables the protocol check; 923 * proto == IPPROTO_ETHERTYPE looks up an internal table 924 * proto == <some value in /etc/protocols> matches the values there. 925 * Returns *end == s in case the parameter is not found. 926 */ 927 static int 928 strtoport(char *s, char **end, int base, int proto) 929 { 930 char *p, *buf; 931 char *s1; 932 int i; 933 934 *end = s; /* default - not found */ 935 if (*s == '\0') 936 return 0; /* not found */ 937 938 if (isdigit(*s)) 939 return strtol(s, end, base); 940 941 /* 942 * find separator. '\\' escapes the next char. 943 */ 944 for (s1 = s; *s1 && (isalnum(*s1) || *s1 == '\\' || 945 *s1 == '_' || *s1 == '.') ; s1++) 946 if (*s1 == '\\' && s1[1] != '\0') 947 s1++; 948 949 buf = safe_calloc(s1 - s + 1, 1); 950 951 /* 952 * copy into a buffer skipping backslashes 953 */ 954 for (p = s, i = 0; p != s1 ; p++) 955 if (*p != '\\') 956 buf[i++] = *p; 957 buf[i++] = '\0'; 958 959 if (proto == IPPROTO_ETHERTYPE) { 960 i = match_token(ether_types, buf); 961 free(buf); 962 if (i != -1) { /* found */ 963 *end = s1; 964 return i; 965 } 966 } else { 967 struct protoent *pe = NULL; 968 struct servent *se; 969 970 if (proto != 0) 971 pe = getprotobynumber(proto); 972 setservent(1); 973 se = getservbyname(buf, pe ? pe->p_name : NULL); 974 free(buf); 975 if (se != NULL) { 976 *end = s1; 977 return ntohs(se->s_port); 978 } 979 } 980 return 0; /* not found */ 981 } 982 983 /* 984 * Fill the body of the command with the list of port ranges. 985 */ 986 static int 987 fill_newports(ipfw_insn_u16 *cmd, char *av, int proto, int cblen) 988 { 989 uint16_t a, b, *p = cmd->ports; 990 int i = 0; 991 char *s = av; 992 993 while (*s) { 994 a = strtoport(av, &s, 0, proto); 995 if (s == av) /* empty or invalid argument */ 996 return (0); 997 998 CHECK_LENGTH(cblen, i + 2); 999 1000 switch (*s) { 1001 case '-': /* a range */ 1002 av = s + 1; 1003 b = strtoport(av, &s, 0, proto); 1004 /* Reject expressions like '1-abc' or '1-2-3'. */ 1005 if (s == av || (*s != ',' && *s != '\0')) 1006 return (0); 1007 p[0] = a; 1008 p[1] = b; 1009 break; 1010 case ',': /* comma separated list */ 1011 case '\0': 1012 p[0] = p[1] = a; 1013 break; 1014 default: 1015 warnx("port list: invalid separator <%c> in <%s>", 1016 *s, av); 1017 return (0); 1018 } 1019 1020 i++; 1021 p += 2; 1022 av = s + 1; 1023 } 1024 if (i > 0) { 1025 if (i + 1 > F_LEN_MASK) 1026 errx(EX_DATAERR, "too many ports/ranges\n"); 1027 cmd->o.len |= i + 1; /* leave F_NOT and F_OR untouched */ 1028 } 1029 return (i); 1030 } 1031 1032 /* 1033 * Fill the body of the command with the list of DiffServ codepoints. 1034 */ 1035 static void 1036 fill_dscp(ipfw_insn *cmd, char *av, int cblen) 1037 { 1038 uint32_t *low, *high; 1039 char *s = av, *a; 1040 int code; 1041 1042 cmd->opcode = O_DSCP; 1043 cmd->len |= F_INSN_SIZE(ipfw_insn_u32) + 1; 1044 1045 CHECK_CMDLEN; 1046 1047 low = (uint32_t *)(cmd + 1); 1048 high = low + 1; 1049 1050 *low = 0; 1051 *high = 0; 1052 1053 while (s != NULL) { 1054 a = strchr(s, ','); 1055 1056 if (a != NULL) 1057 *a++ = '\0'; 1058 1059 if (isalpha(*s)) { 1060 if ((code = match_token(f_ipdscp, s)) == -1) 1061 errx(EX_DATAERR, "Unknown DSCP code"); 1062 } else { 1063 code = strtoul(s, NULL, 10); 1064 if (code < 0 || code > 63) 1065 errx(EX_DATAERR, "Invalid DSCP value"); 1066 } 1067 1068 if (code >= 32) 1069 *high |= 1 << (code - 32); 1070 else 1071 *low |= 1 << code; 1072 1073 s = a; 1074 } 1075 } 1076 1077 static struct _s_x icmpcodes[] = { 1078 { "net", ICMP_UNREACH_NET }, 1079 { "host", ICMP_UNREACH_HOST }, 1080 { "protocol", ICMP_UNREACH_PROTOCOL }, 1081 { "port", ICMP_UNREACH_PORT }, 1082 { "needfrag", ICMP_UNREACH_NEEDFRAG }, 1083 { "srcfail", ICMP_UNREACH_SRCFAIL }, 1084 { "net-unknown", ICMP_UNREACH_NET_UNKNOWN }, 1085 { "host-unknown", ICMP_UNREACH_HOST_UNKNOWN }, 1086 { "isolated", ICMP_UNREACH_ISOLATED }, 1087 { "net-prohib", ICMP_UNREACH_NET_PROHIB }, 1088 { "host-prohib", ICMP_UNREACH_HOST_PROHIB }, 1089 { "tosnet", ICMP_UNREACH_TOSNET }, 1090 { "toshost", ICMP_UNREACH_TOSHOST }, 1091 { "filter-prohib", ICMP_UNREACH_FILTER_PROHIB }, 1092 { "host-precedence", ICMP_UNREACH_HOST_PRECEDENCE }, 1093 { "precedence-cutoff", ICMP_UNREACH_PRECEDENCE_CUTOFF }, 1094 { NULL, 0 } 1095 }; 1096 1097 static void 1098 fill_reject_code(u_short *codep, char *str) 1099 { 1100 int val; 1101 char *s; 1102 1103 val = strtoul(str, &s, 0); 1104 if (s == str || *s != '\0' || val >= 0x100) 1105 val = match_token(icmpcodes, str); 1106 if (val < 0) 1107 errx(EX_DATAERR, "unknown ICMP unreachable code ``%s''", str); 1108 *codep = val; 1109 return; 1110 } 1111 1112 static void 1113 print_reject_code(struct buf_pr *bp, uint16_t code) 1114 { 1115 char const *s; 1116 1117 if ((s = match_value(icmpcodes, code)) != NULL) 1118 bprintf(bp, "unreach %s", s); 1119 else 1120 bprintf(bp, "unreach %u", code); 1121 } 1122 1123 /* 1124 * Returns the number of bits set (from left) in a contiguous bitmask, 1125 * or -1 if the mask is not contiguous. 1126 * XXX this needs a proper fix. 1127 * This effectively works on masks in big-endian (network) format. 1128 * when compiled on little endian architectures. 1129 * 1130 * First bit is bit 7 of the first byte -- note, for MAC addresses, 1131 * the first bit on the wire is bit 0 of the first byte. 1132 * len is the max length in bits. 1133 */ 1134 int 1135 contigmask(uint8_t *p, int len) 1136 { 1137 int i, n; 1138 1139 for (i=0; i<len ; i++) 1140 if ( (p[i/8] & (1 << (7 - (i%8)))) == 0) /* first bit unset */ 1141 break; 1142 for (n=i+1; n < len; n++) 1143 if ( (p[n/8] & (1 << (7 - (n%8)))) != 0) 1144 return -1; /* mask not contiguous */ 1145 return i; 1146 } 1147 1148 /* 1149 * print flags set/clear in the two bitmasks passed as parameters. 1150 * There is a specialized check for f_tcpflags. 1151 */ 1152 static void 1153 print_flags(struct buf_pr *bp, char const *name, ipfw_insn *cmd, 1154 struct _s_x *list) 1155 { 1156 char const *comma = ""; 1157 int i; 1158 uint8_t set = cmd->arg1 & 0xff; 1159 uint8_t clear = (cmd->arg1 >> 8) & 0xff; 1160 1161 if (list == f_tcpflags && set == TH_SYN && clear == TH_ACK) { 1162 bprintf(bp, " setup"); 1163 return; 1164 } 1165 1166 bprintf(bp, " %s ", name); 1167 for (i=0; list[i].x != 0; i++) { 1168 if (set & list[i].x) { 1169 set &= ~list[i].x; 1170 bprintf(bp, "%s%s", comma, list[i].s); 1171 comma = ","; 1172 } 1173 if (clear & list[i].x) { 1174 clear &= ~list[i].x; 1175 bprintf(bp, "%s!%s", comma, list[i].s); 1176 comma = ","; 1177 } 1178 } 1179 } 1180 1181 1182 /* 1183 * Print the ip address contained in a command. 1184 */ 1185 static void 1186 print_ip(struct buf_pr *bp, const struct format_opts *fo, ipfw_insn_ip *cmd) 1187 { 1188 struct hostent *he = NULL; 1189 struct in_addr *ia; 1190 uint32_t len = F_LEN((ipfw_insn *)cmd); 1191 uint32_t *a = ((ipfw_insn_u32 *)cmd)->d; 1192 char *t; 1193 1194 bprintf(bp, " "); 1195 if (cmd->o.opcode == O_IP_DST_LOOKUP && len > F_INSN_SIZE(ipfw_insn_u32)) { 1196 uint32_t d = a[1]; 1197 const char *arg = "<invalid>"; 1198 1199 if (d < sizeof(lookup_key)/sizeof(lookup_key[0])) 1200 arg = match_value(rule_options, lookup_key[d]); 1201 t = table_search_ctlv(fo->tstate, ((ipfw_insn *)cmd)->arg1); 1202 bprintf(bp, "lookup %s %s", arg, t); 1203 return; 1204 } 1205 if (cmd->o.opcode == O_IP_SRC_ME || cmd->o.opcode == O_IP_DST_ME) { 1206 bprintf(bp, "me"); 1207 return; 1208 } 1209 if (cmd->o.opcode == O_IP_SRC_LOOKUP || 1210 cmd->o.opcode == O_IP_DST_LOOKUP) { 1211 t = table_search_ctlv(fo->tstate, ((ipfw_insn *)cmd)->arg1); 1212 bprintf(bp, "table(%s", t); 1213 if (len == F_INSN_SIZE(ipfw_insn_u32)) 1214 bprintf(bp, ",%u", *a); 1215 bprintf(bp, ")"); 1216 return; 1217 } 1218 if (cmd->o.opcode == O_IP_SRC_SET || cmd->o.opcode == O_IP_DST_SET) { 1219 uint32_t x, *map = (uint32_t *)&(cmd->mask); 1220 int i, j; 1221 char comma = '{'; 1222 1223 x = cmd->o.arg1 - 1; 1224 x = htonl( ~x ); 1225 cmd->addr.s_addr = htonl(cmd->addr.s_addr); 1226 bprintf(bp, "%s/%d", inet_ntoa(cmd->addr), 1227 contigmask((uint8_t *)&x, 32)); 1228 x = cmd->addr.s_addr = htonl(cmd->addr.s_addr); 1229 x &= 0xff; /* base */ 1230 /* 1231 * Print bits and ranges. 1232 * Locate first bit set (i), then locate first bit unset (j). 1233 * If we have 3+ consecutive bits set, then print them as a 1234 * range, otherwise only print the initial bit and rescan. 1235 */ 1236 for (i=0; i < cmd->o.arg1; i++) 1237 if (map[i/32] & (1<<(i & 31))) { 1238 for (j=i+1; j < cmd->o.arg1; j++) 1239 if (!(map[ j/32] & (1<<(j & 31)))) 1240 break; 1241 bprintf(bp, "%c%d", comma, i+x); 1242 if (j>i+2) { /* range has at least 3 elements */ 1243 bprintf(bp, "-%d", j-1+x); 1244 i = j-1; 1245 } 1246 comma = ','; 1247 } 1248 bprintf(bp, "}"); 1249 return; 1250 } 1251 /* 1252 * len == 2 indicates a single IP, whereas lists of 1 or more 1253 * addr/mask pairs have len = (2n+1). We convert len to n so we 1254 * use that to count the number of entries. 1255 */ 1256 for (len = len / 2; len > 0; len--, a += 2) { 1257 int mb = /* mask length */ 1258 (cmd->o.opcode == O_IP_SRC || cmd->o.opcode == O_IP_DST) ? 1259 32 : contigmask((uint8_t *)&(a[1]), 32); 1260 if (mb == 32 && co.do_resolv) 1261 he = gethostbyaddr((char *)&(a[0]), sizeof(in_addr_t), 1262 AF_INET); 1263 if (he != NULL) /* resolved to name */ 1264 bprintf(bp, "%s", he->h_name); 1265 else if (mb == 0) /* any */ 1266 bprintf(bp, "any"); 1267 else { /* numeric IP followed by some kind of mask */ 1268 ia = (struct in_addr *)&a[0]; 1269 bprintf(bp, "%s", inet_ntoa(*ia)); 1270 if (mb < 0) { 1271 ia = (struct in_addr *)&a[1]; 1272 bprintf(bp, ":%s", inet_ntoa(*ia)); 1273 } else if (mb < 32) 1274 bprintf(bp, "/%d", mb); 1275 } 1276 if (len > 1) 1277 bprintf(bp, ","); 1278 } 1279 } 1280 1281 /* 1282 * prints a MAC address/mask pair 1283 */ 1284 static void 1285 format_mac(struct buf_pr *bp, uint8_t *addr, uint8_t *mask) 1286 { 1287 int l = contigmask(mask, 48); 1288 1289 if (l == 0) 1290 bprintf(bp, " any"); 1291 else { 1292 bprintf(bp, " %02x:%02x:%02x:%02x:%02x:%02x", 1293 addr[0], addr[1], addr[2], addr[3], addr[4], addr[5]); 1294 if (l == -1) 1295 bprintf(bp, "&%02x:%02x:%02x:%02x:%02x:%02x", 1296 mask[0], mask[1], mask[2], 1297 mask[3], mask[4], mask[5]); 1298 else if (l < 48) 1299 bprintf(bp, "/%d", l); 1300 } 1301 } 1302 1303 static void 1304 print_mac(struct buf_pr *bp, ipfw_insn_mac *mac) 1305 { 1306 1307 bprintf(bp, " MAC"); 1308 format_mac(bp, mac->addr, mac->mask); 1309 format_mac(bp, mac->addr + 6, mac->mask + 6); 1310 } 1311 1312 static void 1313 fill_icmptypes(ipfw_insn_u32 *cmd, char *av) 1314 { 1315 uint8_t type; 1316 1317 cmd->d[0] = 0; 1318 while (*av) { 1319 if (*av == ',') 1320 av++; 1321 1322 type = strtoul(av, &av, 0); 1323 1324 if (*av != ',' && *av != '\0') 1325 errx(EX_DATAERR, "invalid ICMP type"); 1326 1327 if (type > 31) 1328 errx(EX_DATAERR, "ICMP type out of range"); 1329 1330 cmd->d[0] |= 1 << type; 1331 } 1332 cmd->o.opcode = O_ICMPTYPE; 1333 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32); 1334 } 1335 1336 static void 1337 print_icmptypes(struct buf_pr *bp, ipfw_insn_u32 *cmd) 1338 { 1339 int i; 1340 char sep= ' '; 1341 1342 bprintf(bp, " icmptypes"); 1343 for (i = 0; i < 32; i++) { 1344 if ( (cmd->d[0] & (1 << (i))) == 0) 1345 continue; 1346 bprintf(bp, "%c%d", sep, i); 1347 sep = ','; 1348 } 1349 } 1350 1351 static void 1352 print_dscp(struct buf_pr *bp, ipfw_insn_u32 *cmd) 1353 { 1354 int i = 0; 1355 uint32_t *v; 1356 char sep= ' '; 1357 const char *code; 1358 1359 bprintf(bp, " dscp"); 1360 v = cmd->d; 1361 while (i < 64) { 1362 if (*v & (1 << i)) { 1363 if ((code = match_value(f_ipdscp, i)) != NULL) 1364 bprintf(bp, "%c%s", sep, code); 1365 else 1366 bprintf(bp, "%c%d", sep, i); 1367 sep = ','; 1368 } 1369 1370 if ((++i % 32) == 0) 1371 v++; 1372 } 1373 } 1374 1375 #define insntod(cmd, type) ((ipfw_insn_ ## type *)(cmd)) 1376 struct show_state { 1377 struct ip_fw_rule *rule; 1378 const ipfw_insn *eaction; 1379 uint8_t *printed; 1380 int flags; 1381 #define HAVE_PROTO 0x0001 1382 #define HAVE_SRCIP 0x0002 1383 #define HAVE_DSTIP 0x0004 1384 #define HAVE_PROBE_STATE 0x0008 1385 int proto; 1386 int or_block; 1387 }; 1388 1389 static int 1390 init_show_state(struct show_state *state, struct ip_fw_rule *rule) 1391 { 1392 1393 state->printed = calloc(rule->cmd_len, sizeof(uint8_t)); 1394 if (state->printed == NULL) 1395 return (ENOMEM); 1396 state->rule = rule; 1397 state->eaction = NULL; 1398 state->flags = 0; 1399 state->proto = 0; 1400 state->or_block = 0; 1401 return (0); 1402 } 1403 1404 static void 1405 free_show_state(struct show_state *state) 1406 { 1407 1408 free(state->printed); 1409 } 1410 1411 static uint8_t 1412 is_printed_opcode(struct show_state *state, const ipfw_insn *cmd) 1413 { 1414 1415 return (state->printed[cmd - state->rule->cmd]); 1416 } 1417 1418 static void 1419 mark_printed(struct show_state *state, const ipfw_insn *cmd) 1420 { 1421 1422 state->printed[cmd - state->rule->cmd] = 1; 1423 } 1424 1425 static void 1426 print_limit_mask(struct buf_pr *bp, const ipfw_insn_limit *limit) 1427 { 1428 struct _s_x *p = limit_masks; 1429 char const *comma = " "; 1430 uint8_t x; 1431 1432 for (x = limit->limit_mask; p->x != 0; p++) { 1433 if ((x & p->x) == p->x) { 1434 x &= ~p->x; 1435 bprintf(bp, "%s%s", comma, p->s); 1436 comma = ","; 1437 } 1438 } 1439 bprint_uint_arg(bp, " ", limit->conn_limit); 1440 } 1441 1442 static int 1443 print_instruction(struct buf_pr *bp, const struct format_opts *fo, 1444 struct show_state *state, ipfw_insn *cmd) 1445 { 1446 struct protoent *pe; 1447 struct passwd *pwd; 1448 struct group *grp; 1449 const char *s; 1450 double d; 1451 1452 if (is_printed_opcode(state, cmd)) 1453 return (0); 1454 if ((cmd->len & F_OR) != 0 && state->or_block == 0) 1455 bprintf(bp, " {"); 1456 if (cmd->opcode != O_IN && (cmd->len & F_NOT) != 0) 1457 bprintf(bp, " not"); 1458 1459 switch (cmd->opcode) { 1460 case O_PROB: 1461 d = 1.0 * insntod(cmd, u32)->d[0] / 0x7fffffff; 1462 bprintf(bp, "prob %f ", d); 1463 break; 1464 case O_PROBE_STATE: /* no need to print anything here */ 1465 state->flags |= HAVE_PROBE_STATE; 1466 break; 1467 case O_IP_SRC: 1468 case O_IP_SRC_LOOKUP: 1469 case O_IP_SRC_MASK: 1470 case O_IP_SRC_ME: 1471 case O_IP_SRC_SET: 1472 if (state->flags & HAVE_SRCIP) 1473 bprintf(bp, " src-ip"); 1474 print_ip(bp, fo, insntod(cmd, ip)); 1475 break; 1476 case O_IP_DST: 1477 case O_IP_DST_LOOKUP: 1478 case O_IP_DST_MASK: 1479 case O_IP_DST_ME: 1480 case O_IP_DST_SET: 1481 if (state->flags & HAVE_DSTIP) 1482 bprintf(bp, " dst-ip"); 1483 print_ip(bp, fo, insntod(cmd, ip)); 1484 break; 1485 case O_IP6_SRC: 1486 case O_IP6_SRC_MASK: 1487 case O_IP6_SRC_ME: 1488 if (state->flags & HAVE_SRCIP) 1489 bprintf(bp, " src-ip6"); 1490 print_ip6(bp, insntod(cmd, ip6)); 1491 break; 1492 case O_IP6_DST: 1493 case O_IP6_DST_MASK: 1494 case O_IP6_DST_ME: 1495 if (state->flags & HAVE_DSTIP) 1496 bprintf(bp, " dst-ip6"); 1497 print_ip6(bp, insntod(cmd, ip6)); 1498 break; 1499 case O_FLOW6ID: 1500 print_flow6id(bp, insntod(cmd, u32)); 1501 break; 1502 case O_IP_DSTPORT: 1503 case O_IP_SRCPORT: 1504 print_newports(bp, insntod(cmd, u16), state->proto, 1505 (state->flags & (HAVE_SRCIP | HAVE_DSTIP)) == 1506 (HAVE_SRCIP | HAVE_DSTIP) ? cmd->opcode: 0); 1507 break; 1508 case O_PROTO: 1509 pe = getprotobynumber(cmd->arg1); 1510 if (state->flags & HAVE_PROTO) 1511 bprintf(bp, " proto"); 1512 if (pe != NULL) 1513 bprintf(bp, " %s", pe->p_name); 1514 else 1515 bprintf(bp, " %u", cmd->arg1); 1516 state->proto = cmd->arg1; 1517 break; 1518 case O_MACADDR2: 1519 print_mac(bp, insntod(cmd, mac)); 1520 break; 1521 case O_MAC_TYPE: 1522 print_newports(bp, insntod(cmd, u16), 1523 IPPROTO_ETHERTYPE, cmd->opcode); 1524 break; 1525 case O_FRAG: 1526 bprintf(bp, " frag"); 1527 break; 1528 case O_FIB: 1529 bprintf(bp, " fib %u", cmd->arg1); 1530 break; 1531 case O_SOCKARG: 1532 bprintf(bp, " sockarg"); 1533 break; 1534 case O_IN: 1535 bprintf(bp, cmd->len & F_NOT ? " out" : " in"); 1536 break; 1537 case O_DIVERTED: 1538 switch (cmd->arg1) { 1539 case 3: 1540 bprintf(bp, " diverted"); 1541 break; 1542 case 2: 1543 bprintf(bp, " diverted-output"); 1544 break; 1545 case 1: 1546 bprintf(bp, " diverted-loopback"); 1547 break; 1548 default: 1549 bprintf(bp, " diverted-?<%u>", cmd->arg1); 1550 break; 1551 } 1552 break; 1553 case O_LAYER2: 1554 bprintf(bp, " layer2"); 1555 break; 1556 case O_XMIT: 1557 case O_RECV: 1558 case O_VIA: 1559 if (cmd->opcode == O_XMIT) 1560 s = "xmit"; 1561 else if (cmd->opcode == O_RECV) 1562 s = "recv"; 1563 else /* if (cmd->opcode == O_VIA) */ 1564 s = "via"; 1565 switch (insntod(cmd, if)->name[0]) { 1566 case '\0': 1567 bprintf(bp, " %s %s", s, 1568 inet_ntoa(insntod(cmd, if)->p.ip)); 1569 break; 1570 case '\1': 1571 bprintf(bp, " %s table(%s)", s, 1572 table_search_ctlv(fo->tstate, 1573 insntod(cmd, if)->p.kidx)); 1574 break; 1575 default: 1576 bprintf(bp, " %s %s", s, 1577 insntod(cmd, if)->name); 1578 } 1579 break; 1580 case O_IP_FLOW_LOOKUP: 1581 s = table_search_ctlv(fo->tstate, cmd->arg1); 1582 bprintf(bp, " flow table(%s", s); 1583 if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_u32)) 1584 bprintf(bp, ",%u", insntod(cmd, u32)->d[0]); 1585 bprintf(bp, ")"); 1586 break; 1587 case O_IPID: 1588 case O_IPTTL: 1589 case O_IPLEN: 1590 case O_TCPDATALEN: 1591 case O_TCPWIN: 1592 if (F_LEN(cmd) == 1) { 1593 switch (cmd->opcode) { 1594 case O_IPID: 1595 s = "ipid"; 1596 break; 1597 case O_IPTTL: 1598 s = "ipttl"; 1599 break; 1600 case O_IPLEN: 1601 s = "iplen"; 1602 break; 1603 case O_TCPDATALEN: 1604 s = "tcpdatalen"; 1605 break; 1606 case O_TCPWIN: 1607 s = "tcpwin"; 1608 break; 1609 } 1610 bprintf(bp, " %s %u", s, cmd->arg1); 1611 } else 1612 print_newports(bp, insntod(cmd, u16), 0, 1613 cmd->opcode); 1614 break; 1615 case O_IPVER: 1616 bprintf(bp, " ipver %u", cmd->arg1); 1617 break; 1618 case O_IPPRECEDENCE: 1619 bprintf(bp, " ipprecedence %u", cmd->arg1 >> 5); 1620 break; 1621 case O_DSCP: 1622 print_dscp(bp, insntod(cmd, u32)); 1623 break; 1624 case O_IPOPT: 1625 print_flags(bp, "ipoptions", cmd, f_ipopts); 1626 break; 1627 case O_IPTOS: 1628 print_flags(bp, "iptos", cmd, f_iptos); 1629 break; 1630 case O_ICMPTYPE: 1631 print_icmptypes(bp, insntod(cmd, u32)); 1632 break; 1633 case O_ESTAB: 1634 bprintf(bp, " established"); 1635 break; 1636 case O_TCPFLAGS: 1637 print_flags(bp, "tcpflags", cmd, f_tcpflags); 1638 break; 1639 case O_TCPOPTS: 1640 print_flags(bp, "tcpoptions", cmd, f_tcpopts); 1641 break; 1642 case O_TCPACK: 1643 bprintf(bp, " tcpack %d", 1644 ntohl(insntod(cmd, u32)->d[0])); 1645 break; 1646 case O_TCPSEQ: 1647 bprintf(bp, " tcpseq %d", 1648 ntohl(insntod(cmd, u32)->d[0])); 1649 break; 1650 case O_UID: 1651 pwd = getpwuid(insntod(cmd, u32)->d[0]); 1652 if (pwd != NULL) 1653 bprintf(bp, " uid %s", pwd->pw_name); 1654 else 1655 bprintf(bp, " uid %u", 1656 insntod(cmd, u32)->d[0]); 1657 break; 1658 case O_GID: 1659 grp = getgrgid(insntod(cmd, u32)->d[0]); 1660 if (grp != NULL) 1661 bprintf(bp, " gid %s", grp->gr_name); 1662 else 1663 bprintf(bp, " gid %u", 1664 insntod(cmd, u32)->d[0]); 1665 break; 1666 case O_JAIL: 1667 bprintf(bp, " jail %d", insntod(cmd, u32)->d[0]); 1668 break; 1669 case O_VERREVPATH: 1670 bprintf(bp, " verrevpath"); 1671 break; 1672 case O_VERSRCREACH: 1673 bprintf(bp, " versrcreach"); 1674 break; 1675 case O_ANTISPOOF: 1676 bprintf(bp, " antispoof"); 1677 break; 1678 case O_IPSEC: 1679 bprintf(bp, " ipsec"); 1680 break; 1681 case O_NOP: 1682 bprintf(bp, " // %s", (char *)(cmd + 1)); 1683 break; 1684 case O_KEEP_STATE: 1685 if (state->flags & HAVE_PROBE_STATE) 1686 bprintf(bp, " keep-state"); 1687 else 1688 bprintf(bp, " record-state"); 1689 bprintf(bp, " :%s", 1690 object_search_ctlv(fo->tstate, cmd->arg1, 1691 IPFW_TLV_STATE_NAME)); 1692 break; 1693 case O_LIMIT: 1694 if (state->flags & HAVE_PROBE_STATE) 1695 bprintf(bp, " limit"); 1696 else 1697 bprintf(bp, " set-limit"); 1698 print_limit_mask(bp, insntod(cmd, limit)); 1699 bprintf(bp, " :%s", 1700 object_search_ctlv(fo->tstate, cmd->arg1, 1701 IPFW_TLV_STATE_NAME)); 1702 break; 1703 case O_IP6: 1704 if (state->flags & HAVE_PROTO) 1705 bprintf(bp, " proto"); 1706 bprintf(bp, " ip6"); 1707 break; 1708 case O_IP4: 1709 if (state->flags & HAVE_PROTO) 1710 bprintf(bp, " proto"); 1711 bprintf(bp, " ip4"); 1712 break; 1713 case O_ICMP6TYPE: 1714 print_icmp6types(bp, insntod(cmd, u32)); 1715 break; 1716 case O_EXT_HDR: 1717 print_ext6hdr(bp, cmd); 1718 break; 1719 case O_TAGGED: 1720 if (F_LEN(cmd) == 1) 1721 bprint_uint_arg(bp, " tagged ", cmd->arg1); 1722 else 1723 print_newports(bp, insntod(cmd, u16), 1724 0, O_TAGGED); 1725 break; 1726 case O_SKIP_ACTION: 1727 bprintf(bp, " defer-immediate-action"); 1728 break; 1729 default: 1730 bprintf(bp, " [opcode %d len %d]", cmd->opcode, 1731 cmd->len); 1732 } 1733 if (cmd->len & F_OR) { 1734 bprintf(bp, " or"); 1735 state->or_block = 1; 1736 } else if (state->or_block != 0) { 1737 bprintf(bp, " }"); 1738 state->or_block = 0; 1739 } 1740 mark_printed(state, cmd); 1741 1742 return (1); 1743 } 1744 1745 static ipfw_insn * 1746 print_opcode(struct buf_pr *bp, struct format_opts *fo, 1747 struct show_state *state, int opcode) 1748 { 1749 ipfw_insn *cmd; 1750 int l; 1751 1752 for (l = state->rule->act_ofs, cmd = state->rule->cmd; 1753 l > 0; l -= F_LEN(cmd), cmd += F_LEN(cmd)) { 1754 /* We use zero opcode to print the rest of options */ 1755 if (opcode >= 0 && cmd->opcode != opcode) 1756 continue; 1757 /* 1758 * Skip O_NOP, when we printing the rest 1759 * of options, it will be handled separately. 1760 */ 1761 if (cmd->opcode == O_NOP && opcode != O_NOP) 1762 continue; 1763 if (!print_instruction(bp, fo, state, cmd)) 1764 continue; 1765 return (cmd); 1766 } 1767 return (NULL); 1768 } 1769 1770 static void 1771 print_fwd(struct buf_pr *bp, const ipfw_insn *cmd) 1772 { 1773 char buf[INET6_ADDRSTRLEN + IF_NAMESIZE + 2]; 1774 ipfw_insn_sa6 *sa6; 1775 ipfw_insn_sa *sa; 1776 uint16_t port; 1777 1778 if (cmd->opcode == O_FORWARD_IP) { 1779 sa = insntod(cmd, sa); 1780 port = sa->sa.sin_port; 1781 if (sa->sa.sin_addr.s_addr == INADDR_ANY) 1782 bprintf(bp, "fwd tablearg"); 1783 else 1784 bprintf(bp, "fwd %s", inet_ntoa(sa->sa.sin_addr)); 1785 } else { 1786 sa6 = insntod(cmd, sa6); 1787 port = sa6->sa.sin6_port; 1788 bprintf(bp, "fwd "); 1789 if (getnameinfo((const struct sockaddr *)&sa6->sa, 1790 sizeof(struct sockaddr_in6), buf, sizeof(buf), NULL, 0, 1791 NI_NUMERICHOST) == 0) 1792 bprintf(bp, "%s", buf); 1793 } 1794 if (port != 0) 1795 bprintf(bp, ",%u", port); 1796 } 1797 1798 static int 1799 print_action_instruction(struct buf_pr *bp, const struct format_opts *fo, 1800 struct show_state *state, const ipfw_insn *cmd) 1801 { 1802 const char *s; 1803 1804 if (is_printed_opcode(state, cmd)) 1805 return (0); 1806 switch (cmd->opcode) { 1807 case O_CHECK_STATE: 1808 bprintf(bp, "check-state"); 1809 if (cmd->arg1 != 0) 1810 s = object_search_ctlv(fo->tstate, cmd->arg1, 1811 IPFW_TLV_STATE_NAME); 1812 else 1813 s = NULL; 1814 bprintf(bp, " :%s", s ? s: "any"); 1815 break; 1816 case O_ACCEPT: 1817 bprintf(bp, "allow"); 1818 break; 1819 case O_COUNT: 1820 bprintf(bp, "count"); 1821 break; 1822 case O_DENY: 1823 bprintf(bp, "deny"); 1824 break; 1825 case O_REJECT: 1826 if (cmd->arg1 == ICMP_REJECT_RST) 1827 bprintf(bp, "reset"); 1828 else if (cmd->arg1 == ICMP_REJECT_ABORT) 1829 bprintf(bp, "abort"); 1830 else if (cmd->arg1 == ICMP_UNREACH_HOST) 1831 bprintf(bp, "reject"); 1832 else 1833 print_reject_code(bp, cmd->arg1); 1834 break; 1835 case O_UNREACH6: 1836 if (cmd->arg1 == ICMP6_UNREACH_RST) 1837 bprintf(bp, "reset6"); 1838 else if (cmd->arg1 == ICMP6_UNREACH_ABORT) 1839 bprintf(bp, "abort6"); 1840 else 1841 print_unreach6_code(bp, cmd->arg1); 1842 break; 1843 case O_SKIPTO: 1844 bprint_uint_arg(bp, "skipto ", cmd->arg1); 1845 break; 1846 case O_PIPE: 1847 bprint_uint_arg(bp, "pipe ", cmd->arg1); 1848 break; 1849 case O_QUEUE: 1850 bprint_uint_arg(bp, "queue ", cmd->arg1); 1851 break; 1852 case O_DIVERT: 1853 bprint_uint_arg(bp, "divert ", cmd->arg1); 1854 break; 1855 case O_TEE: 1856 bprint_uint_arg(bp, "tee ", cmd->arg1); 1857 break; 1858 case O_NETGRAPH: 1859 bprint_uint_arg(bp, "netgraph ", cmd->arg1); 1860 break; 1861 case O_NGTEE: 1862 bprint_uint_arg(bp, "ngtee ", cmd->arg1); 1863 break; 1864 case O_FORWARD_IP: 1865 case O_FORWARD_IP6: 1866 print_fwd(bp, cmd); 1867 break; 1868 case O_LOG: 1869 if (insntod(cmd, log)->max_log > 0) 1870 bprintf(bp, " log logamount %d", 1871 insntod(cmd, log)->max_log); 1872 else 1873 bprintf(bp, " log"); 1874 break; 1875 case O_ALTQ: 1876 #ifndef NO_ALTQ 1877 print_altq_cmd(bp, insntod(cmd, altq)); 1878 #endif 1879 break; 1880 case O_TAG: 1881 bprint_uint_arg(bp, cmd->len & F_NOT ? " untag ": 1882 " tag ", cmd->arg1); 1883 break; 1884 case O_NAT: 1885 if (cmd->arg1 != IP_FW_NAT44_GLOBAL) 1886 bprint_uint_arg(bp, "nat ", cmd->arg1); 1887 else 1888 bprintf(bp, "nat global"); 1889 break; 1890 case O_SETFIB: 1891 if (cmd->arg1 == IP_FW_TARG) 1892 bprint_uint_arg(bp, "setfib ", cmd->arg1); 1893 else 1894 bprintf(bp, "setfib %u", cmd->arg1 & 0x7FFF); 1895 break; 1896 case O_EXTERNAL_ACTION: 1897 /* 1898 * The external action can consists of two following 1899 * each other opcodes - O_EXTERNAL_ACTION and 1900 * O_EXTERNAL_INSTANCE. The first contains the ID of 1901 * name of external action. The second contains the ID 1902 * of name of external action instance. 1903 * NOTE: in case when external action has no named 1904 * instances support, the second opcode isn't needed. 1905 */ 1906 state->eaction = cmd; 1907 s = object_search_ctlv(fo->tstate, cmd->arg1, 1908 IPFW_TLV_EACTION); 1909 if (match_token(rule_eactions, s) != -1) 1910 bprintf(bp, "%s", s); 1911 else 1912 bprintf(bp, "eaction %s", s); 1913 break; 1914 case O_EXTERNAL_INSTANCE: 1915 if (state->eaction == NULL) 1916 break; 1917 /* 1918 * XXX: we need to teach ipfw(9) to rewrite opcodes 1919 * in the user buffer on rule addition. When we add 1920 * the rule, we specify zero TLV type for 1921 * O_EXTERNAL_INSTANCE object. To show correct 1922 * rule after `ipfw add` we need to search instance 1923 * name with zero type. But when we do `ipfw show` 1924 * we calculate TLV type using IPFW_TLV_EACTION_NAME() 1925 * macro. 1926 */ 1927 s = object_search_ctlv(fo->tstate, cmd->arg1, 0); 1928 if (s == NULL) 1929 s = object_search_ctlv(fo->tstate, 1930 cmd->arg1, IPFW_TLV_EACTION_NAME( 1931 state->eaction->arg1)); 1932 bprintf(bp, " %s", s); 1933 break; 1934 case O_EXTERNAL_DATA: 1935 if (state->eaction == NULL) 1936 break; 1937 /* 1938 * Currently we support data formatting only for 1939 * external data with datalen u16. For unknown data 1940 * print its size in bytes. 1941 */ 1942 if (cmd->len == F_INSN_SIZE(ipfw_insn)) 1943 bprintf(bp, " %u", cmd->arg1); 1944 else 1945 bprintf(bp, " %ubytes", 1946 cmd->len * sizeof(uint32_t)); 1947 break; 1948 case O_SETDSCP: 1949 if (cmd->arg1 == IP_FW_TARG) { 1950 bprintf(bp, "setdscp tablearg"); 1951 break; 1952 } 1953 s = match_value(f_ipdscp, cmd->arg1 & 0x3F); 1954 if (s != NULL) 1955 bprintf(bp, "setdscp %s", s); 1956 else 1957 bprintf(bp, "setdscp %u", cmd->arg1 & 0x3F); 1958 break; 1959 case O_REASS: 1960 bprintf(bp, "reass"); 1961 break; 1962 case O_CALLRETURN: 1963 if (cmd->len & F_NOT) 1964 bprintf(bp, "return"); 1965 else 1966 bprint_uint_arg(bp, "call ", cmd->arg1); 1967 break; 1968 default: 1969 bprintf(bp, "** unrecognized action %d len %d ", 1970 cmd->opcode, cmd->len); 1971 } 1972 mark_printed(state, cmd); 1973 1974 return (1); 1975 } 1976 1977 1978 static ipfw_insn * 1979 print_action(struct buf_pr *bp, struct format_opts *fo, 1980 struct show_state *state, uint8_t opcode) 1981 { 1982 ipfw_insn *cmd; 1983 int l; 1984 1985 for (l = state->rule->cmd_len - state->rule->act_ofs, 1986 cmd = ACTION_PTR(state->rule); l > 0; 1987 l -= F_LEN(cmd), cmd += F_LEN(cmd)) { 1988 if (cmd->opcode != opcode) 1989 continue; 1990 if (!print_action_instruction(bp, fo, state, cmd)) 1991 continue; 1992 return (cmd); 1993 } 1994 return (NULL); 1995 } 1996 1997 static void 1998 print_proto(struct buf_pr *bp, struct format_opts *fo, 1999 struct show_state *state) 2000 { 2001 ipfw_insn *cmd; 2002 int l, proto, ip4, ip6; 2003 2004 /* Count all O_PROTO, O_IP4, O_IP6 instructions. */ 2005 proto = ip4 = ip6 = 0; 2006 for (l = state->rule->act_ofs, cmd = state->rule->cmd; 2007 l > 0; l -= F_LEN(cmd), cmd += F_LEN(cmd)) { 2008 switch (cmd->opcode) { 2009 case O_PROTO: 2010 proto++; 2011 break; 2012 case O_IP4: 2013 ip4 = 1; 2014 if (cmd->len & F_OR) 2015 ip4++; 2016 break; 2017 case O_IP6: 2018 ip6 = 1; 2019 if (cmd->len & F_OR) 2020 ip6++; 2021 break; 2022 default: 2023 continue; 2024 } 2025 } 2026 if (proto == 0 && ip4 == 0 && ip6 == 0) { 2027 state->proto = IPPROTO_IP; 2028 state->flags |= HAVE_PROTO; 2029 bprintf(bp, " ip"); 2030 return; 2031 } 2032 /* To handle the case { ip4 or ip6 }, print opcode with F_OR first */ 2033 cmd = NULL; 2034 if (ip4 || ip6) 2035 cmd = print_opcode(bp, fo, state, ip4 > ip6 ? O_IP4: O_IP6); 2036 if (cmd != NULL && (cmd->len & F_OR)) 2037 cmd = print_opcode(bp, fo, state, ip4 > ip6 ? O_IP6: O_IP4); 2038 if (cmd == NULL || (cmd->len & F_OR)) 2039 for (l = proto; l > 0; l--) { 2040 cmd = print_opcode(bp, fo, state, O_PROTO); 2041 if (cmd == NULL || (cmd->len & F_OR) == 0) 2042 break; 2043 } 2044 /* Initialize proto, it is used by print_newports() */ 2045 state->flags |= HAVE_PROTO; 2046 if (state->proto == 0 && ip6 != 0) 2047 state->proto = IPPROTO_IPV6; 2048 } 2049 2050 static int 2051 match_opcode(int opcode, const int opcodes[], size_t nops) 2052 { 2053 int i; 2054 2055 for (i = 0; i < nops; i++) 2056 if (opcode == opcodes[i]) 2057 return (1); 2058 return (0); 2059 } 2060 2061 static void 2062 print_address(struct buf_pr *bp, struct format_opts *fo, 2063 struct show_state *state, const int opcodes[], size_t nops, int portop, 2064 int flag) 2065 { 2066 ipfw_insn *cmd; 2067 int count, l, portcnt, pf; 2068 2069 count = portcnt = 0; 2070 for (l = state->rule->act_ofs, cmd = state->rule->cmd; 2071 l > 0; l -= F_LEN(cmd), cmd += F_LEN(cmd)) { 2072 if (match_opcode(cmd->opcode, opcodes, nops)) 2073 count++; 2074 else if (cmd->opcode == portop) 2075 portcnt++; 2076 } 2077 if (count == 0) 2078 bprintf(bp, " any"); 2079 for (l = state->rule->act_ofs, cmd = state->rule->cmd; 2080 l > 0 && count > 0; l -= F_LEN(cmd), cmd += F_LEN(cmd)) { 2081 if (!match_opcode(cmd->opcode, opcodes, nops)) 2082 continue; 2083 print_instruction(bp, fo, state, cmd); 2084 if ((cmd->len & F_OR) == 0) 2085 break; 2086 count--; 2087 } 2088 /* 2089 * If several O_IP_?PORT opcodes specified, leave them to the 2090 * options section. 2091 */ 2092 if (portcnt == 1) { 2093 for (l = state->rule->act_ofs, cmd = state->rule->cmd, pf = 0; 2094 l > 0; l -= F_LEN(cmd), cmd += F_LEN(cmd)) { 2095 if (cmd->opcode != portop) { 2096 pf = (cmd->len & F_OR); 2097 continue; 2098 } 2099 /* Print opcode iff it is not in OR block. */ 2100 if (pf == 0 && (cmd->len & F_OR) == 0) 2101 print_instruction(bp, fo, state, cmd); 2102 break; 2103 } 2104 } 2105 state->flags |= flag; 2106 } 2107 2108 static const int action_opcodes[] = { 2109 O_CHECK_STATE, O_ACCEPT, O_COUNT, O_DENY, O_REJECT, 2110 O_UNREACH6, O_SKIPTO, O_PIPE, O_QUEUE, O_DIVERT, O_TEE, 2111 O_NETGRAPH, O_NGTEE, O_FORWARD_IP, O_FORWARD_IP6, O_NAT, 2112 O_SETFIB, O_SETDSCP, O_REASS, O_CALLRETURN, 2113 /* keep the following opcodes at the end of the list */ 2114 O_EXTERNAL_ACTION, O_EXTERNAL_INSTANCE, O_EXTERNAL_DATA 2115 }; 2116 2117 static const int modifier_opcodes[] = { 2118 O_LOG, O_ALTQ, O_TAG 2119 }; 2120 2121 static const int src_opcodes[] = { 2122 O_IP_SRC, O_IP_SRC_LOOKUP, O_IP_SRC_MASK, O_IP_SRC_ME, 2123 O_IP_SRC_SET, O_IP6_SRC, O_IP6_SRC_MASK, O_IP6_SRC_ME 2124 }; 2125 2126 static const int dst_opcodes[] = { 2127 O_IP_DST, O_IP_DST_LOOKUP, O_IP_DST_MASK, O_IP_DST_ME, 2128 O_IP_DST_SET, O_IP6_DST, O_IP6_DST_MASK, O_IP6_DST_ME 2129 }; 2130 2131 static void 2132 show_static_rule(struct cmdline_opts *co, struct format_opts *fo, 2133 struct buf_pr *bp, struct ip_fw_rule *rule, struct ip_fw_bcounter *cntr) 2134 { 2135 struct show_state state; 2136 ipfw_insn *cmd; 2137 static int twidth = 0; 2138 int i; 2139 2140 /* Print # DISABLED or skip the rule */ 2141 if ((fo->set_mask & (1 << rule->set)) == 0) { 2142 /* disabled mask */ 2143 if (!co->show_sets) 2144 return; 2145 else 2146 bprintf(bp, "# DISABLED "); 2147 } 2148 if (init_show_state(&state, rule) != 0) { 2149 warn("init_show_state() failed"); 2150 return; 2151 } 2152 bprintf(bp, "%05u ", rule->rulenum); 2153 2154 /* Print counters if enabled */ 2155 if (fo->pcwidth > 0 || fo->bcwidth > 0) { 2156 pr_u64(bp, &cntr->pcnt, fo->pcwidth); 2157 pr_u64(bp, &cntr->bcnt, fo->bcwidth); 2158 } 2159 2160 /* Print timestamp */ 2161 if (co->do_time == TIMESTAMP_NUMERIC) 2162 bprintf(bp, "%10u ", cntr->timestamp); 2163 else if (co->do_time == TIMESTAMP_STRING) { 2164 char timestr[30]; 2165 time_t t = (time_t)0; 2166 2167 if (twidth == 0) { 2168 strcpy(timestr, ctime(&t)); 2169 *strchr(timestr, '\n') = '\0'; 2170 twidth = strlen(timestr); 2171 } 2172 if (cntr->timestamp > 0) { 2173 t = _long_to_time(cntr->timestamp); 2174 2175 strcpy(timestr, ctime(&t)); 2176 *strchr(timestr, '\n') = '\0'; 2177 bprintf(bp, "%s ", timestr); 2178 } else { 2179 bprintf(bp, "%*s", twidth, " "); 2180 } 2181 } 2182 2183 /* Print set number */ 2184 if (co->show_sets) 2185 bprintf(bp, "set %d ", rule->set); 2186 2187 /* Print the optional "match probability" */ 2188 cmd = print_opcode(bp, fo, &state, O_PROB); 2189 /* Print rule action */ 2190 for (i = 0; i < nitems(action_opcodes); i++) { 2191 cmd = print_action(bp, fo, &state, action_opcodes[i]); 2192 if (cmd == NULL) 2193 continue; 2194 /* Handle special cases */ 2195 switch (cmd->opcode) { 2196 case O_CHECK_STATE: 2197 goto end; 2198 case O_EXTERNAL_ACTION: 2199 case O_EXTERNAL_INSTANCE: 2200 /* External action can have several instructions */ 2201 continue; 2202 } 2203 break; 2204 } 2205 /* Print rule modifiers */ 2206 for (i = 0; i < nitems(modifier_opcodes); i++) 2207 print_action(bp, fo, &state, modifier_opcodes[i]); 2208 /* 2209 * Print rule body 2210 */ 2211 if (co->comment_only != 0) 2212 goto end; 2213 2214 if (rule->flags & IPFW_RULE_JUSTOPTS) { 2215 state.flags |= HAVE_PROTO | HAVE_SRCIP | HAVE_DSTIP; 2216 goto justopts; 2217 } 2218 2219 print_proto(bp, fo, &state); 2220 2221 /* Print source */ 2222 bprintf(bp, " from"); 2223 print_address(bp, fo, &state, src_opcodes, nitems(src_opcodes), 2224 O_IP_SRCPORT, HAVE_SRCIP); 2225 2226 /* Print destination */ 2227 bprintf(bp, " to"); 2228 print_address(bp, fo, &state, dst_opcodes, nitems(dst_opcodes), 2229 O_IP_DSTPORT, HAVE_DSTIP); 2230 2231 justopts: 2232 /* Print the rest of options */ 2233 while (print_opcode(bp, fo, &state, -1)) 2234 ; 2235 end: 2236 /* Print comment at the end */ 2237 cmd = print_opcode(bp, fo, &state, O_NOP); 2238 if (co->comment_only != 0 && cmd == NULL) 2239 bprintf(bp, " // ..."); 2240 bprintf(bp, "\n"); 2241 free_show_state(&state); 2242 } 2243 2244 static void 2245 show_dyn_state(struct cmdline_opts *co, struct format_opts *fo, 2246 struct buf_pr *bp, ipfw_dyn_rule *d) 2247 { 2248 struct protoent *pe; 2249 struct in_addr a; 2250 uint16_t rulenum; 2251 char buf[INET6_ADDRSTRLEN]; 2252 2253 if (d->expire == 0 && d->dyn_type != O_LIMIT_PARENT) 2254 return; 2255 2256 bcopy(&d->rule, &rulenum, sizeof(rulenum)); 2257 bprintf(bp, "%05d", rulenum); 2258 if (fo->pcwidth > 0 || fo->bcwidth > 0) { 2259 bprintf(bp, " "); 2260 pr_u64(bp, &d->pcnt, fo->pcwidth); 2261 pr_u64(bp, &d->bcnt, fo->bcwidth); 2262 bprintf(bp, "(%ds)", d->expire); 2263 } 2264 switch (d->dyn_type) { 2265 case O_LIMIT_PARENT: 2266 bprintf(bp, " PARENT %d", d->count); 2267 break; 2268 case O_LIMIT: 2269 bprintf(bp, " LIMIT"); 2270 break; 2271 case O_KEEP_STATE: /* bidir, no mask */ 2272 bprintf(bp, " STATE"); 2273 break; 2274 } 2275 2276 if ((pe = getprotobynumber(d->id.proto)) != NULL) 2277 bprintf(bp, " %s", pe->p_name); 2278 else 2279 bprintf(bp, " proto %u", d->id.proto); 2280 2281 if (d->id.addr_type == 4) { 2282 a.s_addr = htonl(d->id.src_ip); 2283 bprintf(bp, " %s %d", inet_ntoa(a), d->id.src_port); 2284 2285 a.s_addr = htonl(d->id.dst_ip); 2286 bprintf(bp, " <-> %s %d", inet_ntoa(a), d->id.dst_port); 2287 } else if (d->id.addr_type == 6) { 2288 bprintf(bp, " %s %d", inet_ntop(AF_INET6, &d->id.src_ip6, buf, 2289 sizeof(buf)), d->id.src_port); 2290 bprintf(bp, " <-> %s %d", inet_ntop(AF_INET6, &d->id.dst_ip6, 2291 buf, sizeof(buf)), d->id.dst_port); 2292 } else 2293 bprintf(bp, " UNKNOWN <-> UNKNOWN"); 2294 if (d->kidx != 0) 2295 bprintf(bp, " :%s", object_search_ctlv(fo->tstate, 2296 d->kidx, IPFW_TLV_STATE_NAME)); 2297 2298 #define BOTH_SYN (TH_SYN | (TH_SYN << 8)) 2299 #define BOTH_FIN (TH_FIN | (TH_FIN << 8)) 2300 if (co->verbose) { 2301 bprintf(bp, " state 0x%08x%s", d->state, 2302 d->state ? " ": ","); 2303 if (d->state & IPFW_DYN_ORPHANED) 2304 bprintf(bp, "ORPHANED,"); 2305 if ((d->state & BOTH_SYN) == BOTH_SYN) 2306 bprintf(bp, "BOTH_SYN,"); 2307 else { 2308 if (d->state & TH_SYN) 2309 bprintf(bp, "F_SYN,"); 2310 if (d->state & (TH_SYN << 8)) 2311 bprintf(bp, "R_SYN,"); 2312 } 2313 if ((d->state & BOTH_FIN) == BOTH_FIN) 2314 bprintf(bp, "BOTH_FIN,"); 2315 else { 2316 if (d->state & TH_FIN) 2317 bprintf(bp, "F_FIN,"); 2318 if (d->state & (TH_FIN << 8)) 2319 bprintf(bp, "R_FIN,"); 2320 } 2321 bprintf(bp, " f_ack 0x%x, r_ack 0x%x", d->ack_fwd, 2322 d->ack_rev); 2323 } 2324 } 2325 2326 static int 2327 do_range_cmd(int cmd, ipfw_range_tlv *rt) 2328 { 2329 ipfw_range_header rh; 2330 size_t sz; 2331 2332 memset(&rh, 0, sizeof(rh)); 2333 memcpy(&rh.range, rt, sizeof(*rt)); 2334 rh.range.head.length = sizeof(*rt); 2335 rh.range.head.type = IPFW_TLV_RANGE; 2336 sz = sizeof(rh); 2337 2338 if (do_get3(cmd, &rh.opheader, &sz) != 0) 2339 return (-1); 2340 /* Save number of matched objects */ 2341 rt->new_set = rh.range.new_set; 2342 return (0); 2343 } 2344 2345 /* 2346 * This one handles all set-related commands 2347 * ipfw set { show | enable | disable } 2348 * ipfw set swap X Y 2349 * ipfw set move X to Y 2350 * ipfw set move rule X to Y 2351 */ 2352 void 2353 ipfw_sets_handler(char *av[]) 2354 { 2355 ipfw_range_tlv rt; 2356 char *msg; 2357 size_t size; 2358 uint32_t masks[2]; 2359 int i; 2360 uint16_t rulenum; 2361 uint8_t cmd; 2362 2363 av++; 2364 memset(&rt, 0, sizeof(rt)); 2365 2366 if (av[0] == NULL) 2367 errx(EX_USAGE, "set needs command"); 2368 if (_substrcmp(*av, "show") == 0) { 2369 struct format_opts fo; 2370 ipfw_cfg_lheader *cfg; 2371 2372 memset(&fo, 0, sizeof(fo)); 2373 if (ipfw_get_config(&co, &fo, &cfg, &size) != 0) 2374 err(EX_OSERR, "requesting config failed"); 2375 2376 for (i = 0, msg = "disable"; i < RESVD_SET; i++) 2377 if ((cfg->set_mask & (1<<i)) == 0) { 2378 printf("%s %d", msg, i); 2379 msg = ""; 2380 } 2381 msg = (cfg->set_mask != (uint32_t)-1) ? " enable" : "enable"; 2382 for (i = 0; i < RESVD_SET; i++) 2383 if ((cfg->set_mask & (1<<i)) != 0) { 2384 printf("%s %d", msg, i); 2385 msg = ""; 2386 } 2387 printf("\n"); 2388 free(cfg); 2389 } else if (_substrcmp(*av, "swap") == 0) { 2390 av++; 2391 if ( av[0] == NULL || av[1] == NULL ) 2392 errx(EX_USAGE, "set swap needs 2 set numbers\n"); 2393 rt.set = atoi(av[0]); 2394 rt.new_set = atoi(av[1]); 2395 if (!isdigit(*(av[0])) || rt.set > RESVD_SET) 2396 errx(EX_DATAERR, "invalid set number %s\n", av[0]); 2397 if (!isdigit(*(av[1])) || rt.new_set > RESVD_SET) 2398 errx(EX_DATAERR, "invalid set number %s\n", av[1]); 2399 i = do_range_cmd(IP_FW_SET_SWAP, &rt); 2400 } else if (_substrcmp(*av, "move") == 0) { 2401 av++; 2402 if (av[0] && _substrcmp(*av, "rule") == 0) { 2403 rt.flags = IPFW_RCFLAG_RANGE; /* move rules to new set */ 2404 cmd = IP_FW_XMOVE; 2405 av++; 2406 } else 2407 cmd = IP_FW_SET_MOVE; /* Move set to new one */ 2408 if (av[0] == NULL || av[1] == NULL || av[2] == NULL || 2409 av[3] != NULL || _substrcmp(av[1], "to") != 0) 2410 errx(EX_USAGE, "syntax: set move [rule] X to Y\n"); 2411 rulenum = atoi(av[0]); 2412 rt.new_set = atoi(av[2]); 2413 if (cmd == IP_FW_XMOVE) { 2414 rt.start_rule = rulenum; 2415 rt.end_rule = rulenum; 2416 } else 2417 rt.set = rulenum; 2418 rt.new_set = atoi(av[2]); 2419 if (!isdigit(*(av[0])) || (cmd == 3 && rt.set > RESVD_SET) || 2420 (cmd == 2 && rt.start_rule == IPFW_DEFAULT_RULE) ) 2421 errx(EX_DATAERR, "invalid source number %s\n", av[0]); 2422 if (!isdigit(*(av[2])) || rt.new_set > RESVD_SET) 2423 errx(EX_DATAERR, "invalid dest. set %s\n", av[1]); 2424 i = do_range_cmd(cmd, &rt); 2425 if (i < 0) 2426 err(EX_OSERR, "failed to move %s", 2427 cmd == IP_FW_SET_MOVE ? "set": "rule"); 2428 } else if (_substrcmp(*av, "disable") == 0 || 2429 _substrcmp(*av, "enable") == 0 ) { 2430 int which = _substrcmp(*av, "enable") == 0 ? 1 : 0; 2431 2432 av++; 2433 masks[0] = masks[1] = 0; 2434 2435 while (av[0]) { 2436 if (isdigit(**av)) { 2437 i = atoi(*av); 2438 if (i < 0 || i > RESVD_SET) 2439 errx(EX_DATAERR, 2440 "invalid set number %d\n", i); 2441 masks[which] |= (1<<i); 2442 } else if (_substrcmp(*av, "disable") == 0) 2443 which = 0; 2444 else if (_substrcmp(*av, "enable") == 0) 2445 which = 1; 2446 else 2447 errx(EX_DATAERR, 2448 "invalid set command %s\n", *av); 2449 av++; 2450 } 2451 if ( (masks[0] & masks[1]) != 0 ) 2452 errx(EX_DATAERR, 2453 "cannot enable and disable the same set\n"); 2454 2455 rt.set = masks[0]; 2456 rt.new_set = masks[1]; 2457 i = do_range_cmd(IP_FW_SET_ENABLE, &rt); 2458 if (i) 2459 warn("set enable/disable: setsockopt(IP_FW_SET_ENABLE)"); 2460 } else 2461 errx(EX_USAGE, "invalid set command %s\n", *av); 2462 } 2463 2464 void 2465 ipfw_sysctl_handler(char *av[], int which) 2466 { 2467 av++; 2468 2469 if (av[0] == NULL) { 2470 warnx("missing keyword to enable/disable\n"); 2471 } else if (_substrcmp(*av, "firewall") == 0) { 2472 sysctlbyname("net.inet.ip.fw.enable", NULL, 0, 2473 &which, sizeof(which)); 2474 sysctlbyname("net.inet6.ip6.fw.enable", NULL, 0, 2475 &which, sizeof(which)); 2476 } else if (_substrcmp(*av, "one_pass") == 0) { 2477 sysctlbyname("net.inet.ip.fw.one_pass", NULL, 0, 2478 &which, sizeof(which)); 2479 } else if (_substrcmp(*av, "debug") == 0) { 2480 sysctlbyname("net.inet.ip.fw.debug", NULL, 0, 2481 &which, sizeof(which)); 2482 } else if (_substrcmp(*av, "verbose") == 0) { 2483 sysctlbyname("net.inet.ip.fw.verbose", NULL, 0, 2484 &which, sizeof(which)); 2485 } else if (_substrcmp(*av, "dyn_keepalive") == 0) { 2486 sysctlbyname("net.inet.ip.fw.dyn_keepalive", NULL, 0, 2487 &which, sizeof(which)); 2488 #ifndef NO_ALTQ 2489 } else if (_substrcmp(*av, "altq") == 0) { 2490 altq_set_enabled(which); 2491 #endif 2492 } else { 2493 warnx("unrecognize enable/disable keyword: %s\n", *av); 2494 } 2495 } 2496 2497 typedef void state_cb(struct cmdline_opts *co, struct format_opts *fo, 2498 void *arg, void *state); 2499 2500 static void 2501 prepare_format_dyn(struct cmdline_opts *co, struct format_opts *fo, 2502 void *arg, void *_state) 2503 { 2504 ipfw_dyn_rule *d; 2505 int width; 2506 uint8_t set; 2507 2508 d = (ipfw_dyn_rule *)_state; 2509 /* Count _ALL_ states */ 2510 fo->dcnt++; 2511 2512 if (fo->show_counters == 0) 2513 return; 2514 2515 if (co->use_set) { 2516 /* skip states from another set */ 2517 bcopy((char *)&d->rule + sizeof(uint16_t), &set, 2518 sizeof(uint8_t)); 2519 if (set != co->use_set - 1) 2520 return; 2521 } 2522 2523 width = pr_u64(NULL, &d->pcnt, 0); 2524 if (width > fo->pcwidth) 2525 fo->pcwidth = width; 2526 2527 width = pr_u64(NULL, &d->bcnt, 0); 2528 if (width > fo->bcwidth) 2529 fo->bcwidth = width; 2530 } 2531 2532 static int 2533 foreach_state(struct cmdline_opts *co, struct format_opts *fo, 2534 caddr_t base, size_t sz, state_cb dyn_bc, void *dyn_arg) 2535 { 2536 int ttype; 2537 state_cb *fptr; 2538 void *farg; 2539 ipfw_obj_tlv *tlv; 2540 ipfw_obj_ctlv *ctlv; 2541 2542 fptr = NULL; 2543 ttype = 0; 2544 2545 while (sz > 0) { 2546 ctlv = (ipfw_obj_ctlv *)base; 2547 switch (ctlv->head.type) { 2548 case IPFW_TLV_DYNSTATE_LIST: 2549 base += sizeof(*ctlv); 2550 sz -= sizeof(*ctlv); 2551 ttype = IPFW_TLV_DYN_ENT; 2552 fptr = dyn_bc; 2553 farg = dyn_arg; 2554 break; 2555 default: 2556 return (sz); 2557 } 2558 2559 while (sz > 0) { 2560 tlv = (ipfw_obj_tlv *)base; 2561 if (tlv->type != ttype) 2562 break; 2563 2564 fptr(co, fo, farg, tlv + 1); 2565 sz -= tlv->length; 2566 base += tlv->length; 2567 } 2568 } 2569 2570 return (sz); 2571 } 2572 2573 static void 2574 prepare_format_opts(struct cmdline_opts *co, struct format_opts *fo, 2575 ipfw_obj_tlv *rtlv, int rcnt, caddr_t dynbase, size_t dynsz) 2576 { 2577 int bcwidth, pcwidth, width; 2578 int n; 2579 struct ip_fw_bcounter *cntr; 2580 struct ip_fw_rule *r; 2581 2582 bcwidth = 0; 2583 pcwidth = 0; 2584 if (fo->show_counters != 0) { 2585 for (n = 0; n < rcnt; n++, 2586 rtlv = (ipfw_obj_tlv *)((caddr_t)rtlv + rtlv->length)) { 2587 cntr = (struct ip_fw_bcounter *)(rtlv + 1); 2588 r = (struct ip_fw_rule *)((caddr_t)cntr + cntr->size); 2589 /* skip rules from another set */ 2590 if (co->use_set && r->set != co->use_set - 1) 2591 continue; 2592 2593 /* packet counter */ 2594 width = pr_u64(NULL, &cntr->pcnt, 0); 2595 if (width > pcwidth) 2596 pcwidth = width; 2597 2598 /* byte counter */ 2599 width = pr_u64(NULL, &cntr->bcnt, 0); 2600 if (width > bcwidth) 2601 bcwidth = width; 2602 } 2603 } 2604 fo->bcwidth = bcwidth; 2605 fo->pcwidth = pcwidth; 2606 2607 fo->dcnt = 0; 2608 if (co->do_dynamic && dynsz > 0) 2609 foreach_state(co, fo, dynbase, dynsz, prepare_format_dyn, NULL); 2610 } 2611 2612 static int 2613 list_static_range(struct cmdline_opts *co, struct format_opts *fo, 2614 struct buf_pr *bp, ipfw_obj_tlv *rtlv, int rcnt) 2615 { 2616 int n, seen; 2617 struct ip_fw_rule *r; 2618 struct ip_fw_bcounter *cntr; 2619 int c = 0; 2620 2621 for (n = seen = 0; n < rcnt; n++, 2622 rtlv = (ipfw_obj_tlv *)((caddr_t)rtlv + rtlv->length)) { 2623 2624 if ((fo->show_counters | fo->show_time) != 0) { 2625 cntr = (struct ip_fw_bcounter *)(rtlv + 1); 2626 r = (struct ip_fw_rule *)((caddr_t)cntr + cntr->size); 2627 } else { 2628 cntr = NULL; 2629 r = (struct ip_fw_rule *)(rtlv + 1); 2630 } 2631 if (r->rulenum > fo->last) 2632 break; 2633 if (co->use_set && r->set != co->use_set - 1) 2634 continue; 2635 if (r->rulenum >= fo->first && r->rulenum <= fo->last) { 2636 show_static_rule(co, fo, bp, r, cntr); 2637 printf("%s", bp->buf); 2638 c += rtlv->length; 2639 bp_flush(bp); 2640 seen++; 2641 } 2642 } 2643 2644 return (seen); 2645 } 2646 2647 static void 2648 list_dyn_state(struct cmdline_opts *co, struct format_opts *fo, 2649 void *_arg, void *_state) 2650 { 2651 uint16_t rulenum; 2652 uint8_t set; 2653 ipfw_dyn_rule *d; 2654 struct buf_pr *bp; 2655 2656 d = (ipfw_dyn_rule *)_state; 2657 bp = (struct buf_pr *)_arg; 2658 2659 bcopy(&d->rule, &rulenum, sizeof(rulenum)); 2660 if (rulenum > fo->last) 2661 return; 2662 if (co->use_set) { 2663 bcopy((char *)&d->rule + sizeof(uint16_t), 2664 &set, sizeof(uint8_t)); 2665 if (set != co->use_set - 1) 2666 return; 2667 } 2668 if (rulenum >= fo->first) { 2669 show_dyn_state(co, fo, bp, d); 2670 printf("%s\n", bp->buf); 2671 bp_flush(bp); 2672 } 2673 } 2674 2675 static int 2676 list_dyn_range(struct cmdline_opts *co, struct format_opts *fo, 2677 struct buf_pr *bp, caddr_t base, size_t sz) 2678 { 2679 2680 sz = foreach_state(co, fo, base, sz, list_dyn_state, bp); 2681 return (sz); 2682 } 2683 2684 void 2685 ipfw_list(int ac, char *av[], int show_counters) 2686 { 2687 ipfw_cfg_lheader *cfg; 2688 struct format_opts sfo; 2689 size_t sz; 2690 int error; 2691 int lac; 2692 char **lav; 2693 uint32_t rnum; 2694 char *endptr; 2695 2696 if (co.test_only) { 2697 fprintf(stderr, "Testing only, list disabled\n"); 2698 return; 2699 } 2700 if (co.do_pipe) { 2701 dummynet_list(ac, av, show_counters); 2702 return; 2703 } 2704 2705 ac--; 2706 av++; 2707 memset(&sfo, 0, sizeof(sfo)); 2708 2709 /* Determine rule range to request */ 2710 if (ac > 0) { 2711 for (lac = ac, lav = av; lac != 0; lac--) { 2712 rnum = strtoul(*lav++, &endptr, 10); 2713 if (sfo.first == 0 || rnum < sfo.first) 2714 sfo.first = rnum; 2715 2716 if (*endptr == '-') 2717 rnum = strtoul(endptr + 1, &endptr, 10); 2718 if (sfo.last == 0 || rnum > sfo.last) 2719 sfo.last = rnum; 2720 } 2721 } 2722 2723 /* get configuraion from kernel */ 2724 cfg = NULL; 2725 sfo.show_counters = show_counters; 2726 sfo.show_time = co.do_time; 2727 if (co.do_dynamic != 2) 2728 sfo.flags |= IPFW_CFG_GET_STATIC; 2729 if (co.do_dynamic != 0) 2730 sfo.flags |= IPFW_CFG_GET_STATES; 2731 if ((sfo.show_counters | sfo.show_time) != 0) 2732 sfo.flags |= IPFW_CFG_GET_COUNTERS; 2733 if (ipfw_get_config(&co, &sfo, &cfg, &sz) != 0) 2734 err(EX_OSERR, "retrieving config failed"); 2735 2736 error = ipfw_show_config(&co, &sfo, cfg, sz, ac, av); 2737 2738 free(cfg); 2739 2740 if (error != EX_OK) 2741 exit(error); 2742 } 2743 2744 static int 2745 ipfw_show_config(struct cmdline_opts *co, struct format_opts *fo, 2746 ipfw_cfg_lheader *cfg, size_t sz, int ac, char *av[]) 2747 { 2748 caddr_t dynbase; 2749 size_t dynsz; 2750 int rcnt; 2751 int exitval = EX_OK; 2752 int lac; 2753 char **lav; 2754 char *endptr; 2755 size_t readsz; 2756 struct buf_pr bp; 2757 ipfw_obj_ctlv *ctlv, *tstate; 2758 ipfw_obj_tlv *rbase; 2759 2760 /* 2761 * Handle tablenames TLV first, if any 2762 */ 2763 tstate = NULL; 2764 rbase = NULL; 2765 dynbase = NULL; 2766 dynsz = 0; 2767 readsz = sizeof(*cfg); 2768 rcnt = 0; 2769 2770 fo->set_mask = cfg->set_mask; 2771 2772 ctlv = (ipfw_obj_ctlv *)(cfg + 1); 2773 if (ctlv->head.type == IPFW_TLV_TBLNAME_LIST) { 2774 object_sort_ctlv(ctlv); 2775 fo->tstate = ctlv; 2776 readsz += ctlv->head.length; 2777 ctlv = (ipfw_obj_ctlv *)((caddr_t)ctlv + ctlv->head.length); 2778 } 2779 2780 if (cfg->flags & IPFW_CFG_GET_STATIC) { 2781 /* We've requested static rules */ 2782 if (ctlv->head.type == IPFW_TLV_RULE_LIST) { 2783 rbase = (ipfw_obj_tlv *)(ctlv + 1); 2784 rcnt = ctlv->count; 2785 readsz += ctlv->head.length; 2786 ctlv = (ipfw_obj_ctlv *)((caddr_t)ctlv + 2787 ctlv->head.length); 2788 } 2789 } 2790 2791 if ((cfg->flags & IPFW_CFG_GET_STATES) && (readsz != sz)) { 2792 /* We may have some dynamic states */ 2793 dynsz = sz - readsz; 2794 /* Skip empty header */ 2795 if (dynsz != sizeof(ipfw_obj_ctlv)) 2796 dynbase = (caddr_t)ctlv; 2797 else 2798 dynsz = 0; 2799 } 2800 2801 prepare_format_opts(co, fo, rbase, rcnt, dynbase, dynsz); 2802 bp_alloc(&bp, 4096); 2803 2804 /* if no rule numbers were specified, list all rules */ 2805 if (ac == 0) { 2806 fo->first = 0; 2807 fo->last = IPFW_DEFAULT_RULE; 2808 if (cfg->flags & IPFW_CFG_GET_STATIC) 2809 list_static_range(co, fo, &bp, rbase, rcnt); 2810 2811 if (co->do_dynamic && dynsz > 0) { 2812 printf("## Dynamic rules (%d %zu):\n", fo->dcnt, 2813 dynsz); 2814 list_dyn_range(co, fo, &bp, dynbase, dynsz); 2815 } 2816 2817 bp_free(&bp); 2818 return (EX_OK); 2819 } 2820 2821 /* display specific rules requested on command line */ 2822 for (lac = ac, lav = av; lac != 0; lac--) { 2823 /* convert command line rule # */ 2824 fo->last = fo->first = strtoul(*lav++, &endptr, 10); 2825 if (*endptr == '-') 2826 fo->last = strtoul(endptr + 1, &endptr, 10); 2827 if (*endptr) { 2828 exitval = EX_USAGE; 2829 warnx("invalid rule number: %s", *(lav - 1)); 2830 continue; 2831 } 2832 2833 if ((cfg->flags & IPFW_CFG_GET_STATIC) == 0) 2834 continue; 2835 2836 if (list_static_range(co, fo, &bp, rbase, rcnt) == 0) { 2837 /* give precedence to other error(s) */ 2838 if (exitval == EX_OK) 2839 exitval = EX_UNAVAILABLE; 2840 if (fo->first == fo->last) 2841 warnx("rule %u does not exist", fo->first); 2842 else 2843 warnx("no rules in range %u-%u", 2844 fo->first, fo->last); 2845 } 2846 } 2847 2848 if (co->do_dynamic && dynsz > 0) { 2849 printf("## Dynamic rules:\n"); 2850 for (lac = ac, lav = av; lac != 0; lac--) { 2851 fo->last = fo->first = strtoul(*lav++, &endptr, 10); 2852 if (*endptr == '-') 2853 fo->last = strtoul(endptr+1, &endptr, 10); 2854 if (*endptr) 2855 /* already warned */ 2856 continue; 2857 list_dyn_range(co, fo, &bp, dynbase, dynsz); 2858 } 2859 } 2860 2861 bp_free(&bp); 2862 return (exitval); 2863 } 2864 2865 2866 /* 2867 * Retrieves current ipfw configuration of given type 2868 * and stores its pointer to @pcfg. 2869 * 2870 * Caller is responsible for freeing @pcfg. 2871 * 2872 * Returns 0 on success. 2873 */ 2874 2875 static int 2876 ipfw_get_config(struct cmdline_opts *co, struct format_opts *fo, 2877 ipfw_cfg_lheader **pcfg, size_t *psize) 2878 { 2879 ipfw_cfg_lheader *cfg; 2880 size_t sz; 2881 int i; 2882 2883 2884 if (co->test_only != 0) { 2885 fprintf(stderr, "Testing only, list disabled\n"); 2886 return (0); 2887 } 2888 2889 /* Start with some data size */ 2890 sz = 4096; 2891 cfg = NULL; 2892 2893 for (i = 0; i < 16; i++) { 2894 if (cfg != NULL) 2895 free(cfg); 2896 if ((cfg = calloc(1, sz)) == NULL) 2897 return (ENOMEM); 2898 2899 cfg->flags = fo->flags; 2900 cfg->start_rule = fo->first; 2901 cfg->end_rule = fo->last; 2902 2903 if (do_get3(IP_FW_XGET, &cfg->opheader, &sz) != 0) { 2904 if (errno != ENOMEM) { 2905 free(cfg); 2906 return (errno); 2907 } 2908 2909 /* Buffer size is not enough. Try to increase */ 2910 sz = sz * 2; 2911 if (sz < cfg->size) 2912 sz = cfg->size; 2913 continue; 2914 } 2915 2916 *pcfg = cfg; 2917 *psize = sz; 2918 return (0); 2919 } 2920 2921 free(cfg); 2922 return (ENOMEM); 2923 } 2924 2925 static int 2926 lookup_host (char *host, struct in_addr *ipaddr) 2927 { 2928 struct hostent *he; 2929 2930 if (!inet_aton(host, ipaddr)) { 2931 if ((he = gethostbyname(host)) == NULL) 2932 return(-1); 2933 *ipaddr = *(struct in_addr *)he->h_addr_list[0]; 2934 } 2935 return(0); 2936 } 2937 2938 struct tidx { 2939 ipfw_obj_ntlv *idx; 2940 uint32_t count; 2941 uint32_t size; 2942 uint16_t counter; 2943 uint8_t set; 2944 }; 2945 2946 int 2947 ipfw_check_object_name(const char *name) 2948 { 2949 int c, i, l; 2950 2951 /* 2952 * Check that name is null-terminated and contains 2953 * valid symbols only. Valid mask is: 2954 * [a-zA-Z0-9\-_\.]{1,63} 2955 */ 2956 l = strlen(name); 2957 if (l == 0 || l >= 64) 2958 return (EINVAL); 2959 for (i = 0; i < l; i++) { 2960 c = name[i]; 2961 if (isalpha(c) || isdigit(c) || c == '_' || 2962 c == '-' || c == '.') 2963 continue; 2964 return (EINVAL); 2965 } 2966 return (0); 2967 } 2968 2969 static char *default_state_name = "default"; 2970 static int 2971 state_check_name(const char *name) 2972 { 2973 2974 if (ipfw_check_object_name(name) != 0) 2975 return (EINVAL); 2976 if (strcmp(name, "any") == 0) 2977 return (EINVAL); 2978 return (0); 2979 } 2980 2981 static int 2982 eaction_check_name(const char *name) 2983 { 2984 2985 if (ipfw_check_object_name(name) != 0) 2986 return (EINVAL); 2987 /* Restrict some 'special' names */ 2988 if (match_token(rule_actions, name) != -1 && 2989 match_token(rule_action_params, name) != -1) 2990 return (EINVAL); 2991 return (0); 2992 } 2993 2994 static uint16_t 2995 pack_object(struct tidx *tstate, char *name, int otype) 2996 { 2997 int i; 2998 ipfw_obj_ntlv *ntlv; 2999 3000 for (i = 0; i < tstate->count; i++) { 3001 if (strcmp(tstate->idx[i].name, name) != 0) 3002 continue; 3003 if (tstate->idx[i].set != tstate->set) 3004 continue; 3005 if (tstate->idx[i].head.type != otype) 3006 continue; 3007 3008 return (tstate->idx[i].idx); 3009 } 3010 3011 if (tstate->count + 1 > tstate->size) { 3012 tstate->size += 4; 3013 tstate->idx = realloc(tstate->idx, tstate->size * 3014 sizeof(ipfw_obj_ntlv)); 3015 if (tstate->idx == NULL) 3016 return (0); 3017 } 3018 3019 ntlv = &tstate->idx[i]; 3020 memset(ntlv, 0, sizeof(ipfw_obj_ntlv)); 3021 strlcpy(ntlv->name, name, sizeof(ntlv->name)); 3022 ntlv->head.type = otype; 3023 ntlv->head.length = sizeof(ipfw_obj_ntlv); 3024 ntlv->set = tstate->set; 3025 ntlv->idx = ++tstate->counter; 3026 tstate->count++; 3027 3028 return (ntlv->idx); 3029 } 3030 3031 static uint16_t 3032 pack_table(struct tidx *tstate, char *name) 3033 { 3034 3035 if (table_check_name(name) != 0) 3036 return (0); 3037 3038 return (pack_object(tstate, name, IPFW_TLV_TBL_NAME)); 3039 } 3040 3041 void 3042 fill_table(struct _ipfw_insn *cmd, char *av, uint8_t opcode, 3043 struct tidx *tstate) 3044 { 3045 uint32_t *d = ((ipfw_insn_u32 *)cmd)->d; 3046 uint16_t uidx; 3047 char *p; 3048 3049 if ((p = strchr(av + 6, ')')) == NULL) 3050 errx(EX_DATAERR, "forgotten parenthesis: '%s'", av); 3051 *p = '\0'; 3052 p = strchr(av + 6, ','); 3053 if (p) 3054 *p++ = '\0'; 3055 3056 if ((uidx = pack_table(tstate, av + 6)) == 0) 3057 errx(EX_DATAERR, "Invalid table name: %s", av + 6); 3058 3059 cmd->opcode = opcode; 3060 cmd->arg1 = uidx; 3061 if (p) { 3062 cmd->len |= F_INSN_SIZE(ipfw_insn_u32); 3063 d[0] = strtoul(p, NULL, 0); 3064 } else 3065 cmd->len |= F_INSN_SIZE(ipfw_insn); 3066 } 3067 3068 3069 /* 3070 * fills the addr and mask fields in the instruction as appropriate from av. 3071 * Update length as appropriate. 3072 * The following formats are allowed: 3073 * me returns O_IP_*_ME 3074 * 1.2.3.4 single IP address 3075 * 1.2.3.4:5.6.7.8 address:mask 3076 * 1.2.3.4/24 address/mask 3077 * 1.2.3.4/26{1,6,5,4,23} set of addresses in a subnet 3078 * We can have multiple comma-separated address/mask entries. 3079 */ 3080 static void 3081 fill_ip(ipfw_insn_ip *cmd, char *av, int cblen, struct tidx *tstate) 3082 { 3083 int len = 0; 3084 uint32_t *d = ((ipfw_insn_u32 *)cmd)->d; 3085 3086 cmd->o.len &= ~F_LEN_MASK; /* zero len */ 3087 3088 if (_substrcmp(av, "any") == 0) 3089 return; 3090 3091 if (_substrcmp(av, "me") == 0) { 3092 cmd->o.len |= F_INSN_SIZE(ipfw_insn); 3093 return; 3094 } 3095 3096 if (strncmp(av, "table(", 6) == 0) { 3097 fill_table(&cmd->o, av, O_IP_DST_LOOKUP, tstate); 3098 return; 3099 } 3100 3101 while (av) { 3102 /* 3103 * After the address we can have '/' or ':' indicating a mask, 3104 * ',' indicating another address follows, '{' indicating a 3105 * set of addresses of unspecified size. 3106 */ 3107 char *t = NULL, *p = strpbrk(av, "/:,{"); 3108 int masklen; 3109 char md, nd = '\0'; 3110 3111 CHECK_LENGTH(cblen, F_INSN_SIZE(ipfw_insn) + 2 + len); 3112 3113 if (p) { 3114 md = *p; 3115 *p++ = '\0'; 3116 if ((t = strpbrk(p, ",{")) != NULL) { 3117 nd = *t; 3118 *t = '\0'; 3119 } 3120 } else 3121 md = '\0'; 3122 3123 if (lookup_host(av, (struct in_addr *)&d[0]) != 0) 3124 errx(EX_NOHOST, "hostname ``%s'' unknown", av); 3125 switch (md) { 3126 case ':': 3127 if (!inet_aton(p, (struct in_addr *)&d[1])) 3128 errx(EX_DATAERR, "bad netmask ``%s''", p); 3129 break; 3130 case '/': 3131 masklen = atoi(p); 3132 if (masklen == 0) 3133 d[1] = htonl(0U); /* mask */ 3134 else if (masklen > 32) 3135 errx(EX_DATAERR, "bad width ``%s''", p); 3136 else 3137 d[1] = htonl(~0U << (32 - masklen)); 3138 break; 3139 case '{': /* no mask, assume /24 and put back the '{' */ 3140 d[1] = htonl(~0U << (32 - 24)); 3141 *(--p) = md; 3142 break; 3143 3144 case ',': /* single address plus continuation */ 3145 *(--p) = md; 3146 /* FALLTHROUGH */ 3147 case 0: /* initialization value */ 3148 default: 3149 d[1] = htonl(~0U); /* force /32 */ 3150 break; 3151 } 3152 d[0] &= d[1]; /* mask base address with mask */ 3153 if (t) 3154 *t = nd; 3155 /* find next separator */ 3156 if (p) 3157 p = strpbrk(p, ",{"); 3158 if (p && *p == '{') { 3159 /* 3160 * We have a set of addresses. They are stored as follows: 3161 * arg1 is the set size (powers of 2, 2..256) 3162 * addr is the base address IN HOST FORMAT 3163 * mask.. is an array of arg1 bits (rounded up to 3164 * the next multiple of 32) with bits set 3165 * for each host in the map. 3166 */ 3167 uint32_t *map = (uint32_t *)&cmd->mask; 3168 int low, high; 3169 int i = contigmask((uint8_t *)&(d[1]), 32); 3170 3171 if (len > 0) 3172 errx(EX_DATAERR, "address set cannot be in a list"); 3173 if (i < 24 || i > 31) 3174 errx(EX_DATAERR, "invalid set with mask %d\n", i); 3175 cmd->o.arg1 = 1<<(32-i); /* map length */ 3176 d[0] = ntohl(d[0]); /* base addr in host format */ 3177 cmd->o.opcode = O_IP_DST_SET; /* default */ 3178 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32) + (cmd->o.arg1+31)/32; 3179 for (i = 0; i < (cmd->o.arg1+31)/32 ; i++) 3180 map[i] = 0; /* clear map */ 3181 3182 av = p + 1; 3183 low = d[0] & 0xff; 3184 high = low + cmd->o.arg1 - 1; 3185 /* 3186 * Here, i stores the previous value when we specify a range 3187 * of addresses within a mask, e.g. 45-63. i = -1 means we 3188 * have no previous value. 3189 */ 3190 i = -1; /* previous value in a range */ 3191 while (isdigit(*av)) { 3192 char *s; 3193 int a = strtol(av, &s, 0); 3194 3195 if (s == av) { /* no parameter */ 3196 if (*av != '}') 3197 errx(EX_DATAERR, "set not closed\n"); 3198 if (i != -1) 3199 errx(EX_DATAERR, "incomplete range %d-", i); 3200 break; 3201 } 3202 if (a < low || a > high) 3203 errx(EX_DATAERR, "addr %d out of range [%d-%d]\n", 3204 a, low, high); 3205 a -= low; 3206 if (i == -1) /* no previous in range */ 3207 i = a; 3208 else { /* check that range is valid */ 3209 if (i > a) 3210 errx(EX_DATAERR, "invalid range %d-%d", 3211 i+low, a+low); 3212 if (*s == '-') 3213 errx(EX_DATAERR, "double '-' in range"); 3214 } 3215 for (; i <= a; i++) 3216 map[i/32] |= 1<<(i & 31); 3217 i = -1; 3218 if (*s == '-') 3219 i = a; 3220 else if (*s == '}') 3221 break; 3222 av = s+1; 3223 } 3224 return; 3225 } 3226 av = p; 3227 if (av) /* then *av must be a ',' */ 3228 av++; 3229 3230 /* Check this entry */ 3231 if (d[1] == 0) { /* "any", specified as x.x.x.x/0 */ 3232 /* 3233 * 'any' turns the entire list into a NOP. 3234 * 'not any' never matches, so it is removed from the 3235 * list unless it is the only item, in which case we 3236 * report an error. 3237 */ 3238 if (cmd->o.len & F_NOT) { /* "not any" never matches */ 3239 if (av == NULL && len == 0) /* only this entry */ 3240 errx(EX_DATAERR, "not any never matches"); 3241 } 3242 /* else do nothing and skip this entry */ 3243 return; 3244 } 3245 /* A single IP can be stored in an optimized format */ 3246 if (d[1] == (uint32_t)~0 && av == NULL && len == 0) { 3247 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32); 3248 return; 3249 } 3250 len += 2; /* two words... */ 3251 d += 2; 3252 } /* end while */ 3253 if (len + 1 > F_LEN_MASK) 3254 errx(EX_DATAERR, "address list too long"); 3255 cmd->o.len |= len+1; 3256 } 3257 3258 3259 /* n2mask sets n bits of the mask */ 3260 void 3261 n2mask(struct in6_addr *mask, int n) 3262 { 3263 static int minimask[9] = 3264 { 0x00, 0x80, 0xc0, 0xe0, 0xf0, 0xf8, 0xfc, 0xfe, 0xff }; 3265 u_char *p; 3266 3267 memset(mask, 0, sizeof(struct in6_addr)); 3268 p = (u_char *) mask; 3269 for (; n > 0; p++, n -= 8) { 3270 if (n >= 8) 3271 *p = 0xff; 3272 else 3273 *p = minimask[n]; 3274 } 3275 return; 3276 } 3277 3278 static void 3279 fill_flags_cmd(ipfw_insn *cmd, enum ipfw_opcodes opcode, 3280 struct _s_x *flags, char *p) 3281 { 3282 char *e; 3283 uint32_t set = 0, clear = 0; 3284 3285 if (fill_flags(flags, p, &e, &set, &clear) != 0) 3286 errx(EX_DATAERR, "invalid flag %s", e); 3287 3288 cmd->opcode = opcode; 3289 cmd->len = (cmd->len & (F_NOT | F_OR)) | 1; 3290 cmd->arg1 = (set & 0xff) | ( (clear & 0xff) << 8); 3291 } 3292 3293 3294 void 3295 ipfw_delete(char *av[]) 3296 { 3297 ipfw_range_tlv rt; 3298 char *sep; 3299 int i, j; 3300 int exitval = EX_OK; 3301 int do_set = 0; 3302 3303 av++; 3304 NEED1("missing rule specification"); 3305 if ( *av && _substrcmp(*av, "set") == 0) { 3306 /* Do not allow using the following syntax: 3307 * ipfw set N delete set M 3308 */ 3309 if (co.use_set) 3310 errx(EX_DATAERR, "invalid syntax"); 3311 do_set = 1; /* delete set */ 3312 av++; 3313 } 3314 3315 /* Rule number */ 3316 while (*av && isdigit(**av)) { 3317 i = strtol(*av, &sep, 10); 3318 j = i; 3319 if (*sep== '-') 3320 j = strtol(sep + 1, NULL, 10); 3321 av++; 3322 if (co.do_nat) { 3323 exitval = do_cmd(IP_FW_NAT_DEL, &i, sizeof i); 3324 if (exitval) { 3325 exitval = EX_UNAVAILABLE; 3326 if (co.do_quiet) 3327 continue; 3328 warn("nat %u not available", i); 3329 } 3330 } else if (co.do_pipe) { 3331 exitval = ipfw_delete_pipe(co.do_pipe, i); 3332 } else { 3333 memset(&rt, 0, sizeof(rt)); 3334 if (do_set != 0) { 3335 rt.set = i & 31; 3336 rt.flags = IPFW_RCFLAG_SET; 3337 } else { 3338 rt.start_rule = i & 0xffff; 3339 rt.end_rule = j & 0xffff; 3340 if (rt.start_rule == 0 && rt.end_rule == 0) 3341 rt.flags |= IPFW_RCFLAG_ALL; 3342 else 3343 rt.flags |= IPFW_RCFLAG_RANGE; 3344 if (co.use_set != 0) { 3345 rt.set = co.use_set - 1; 3346 rt.flags |= IPFW_RCFLAG_SET; 3347 } 3348 } 3349 if (co.do_dynamic == 2) 3350 rt.flags |= IPFW_RCFLAG_DYNAMIC; 3351 i = do_range_cmd(IP_FW_XDEL, &rt); 3352 if (i != 0) { 3353 exitval = EX_UNAVAILABLE; 3354 if (co.do_quiet) 3355 continue; 3356 warn("rule %u: setsockopt(IP_FW_XDEL)", 3357 rt.start_rule); 3358 } else if (rt.new_set == 0 && do_set == 0 && 3359 co.do_dynamic != 2) { 3360 exitval = EX_UNAVAILABLE; 3361 if (co.do_quiet) 3362 continue; 3363 if (rt.start_rule != rt.end_rule) 3364 warnx("no rules rules in %u-%u range", 3365 rt.start_rule, rt.end_rule); 3366 else 3367 warnx("rule %u not found", 3368 rt.start_rule); 3369 } 3370 } 3371 } 3372 if (exitval != EX_OK && co.do_force == 0) 3373 exit(exitval); 3374 } 3375 3376 3377 /* 3378 * fill the interface structure. We do not check the name as we can 3379 * create interfaces dynamically, so checking them at insert time 3380 * makes relatively little sense. 3381 * Interface names containing '*', '?', or '[' are assumed to be shell 3382 * patterns which match interfaces. 3383 */ 3384 static void 3385 fill_iface(ipfw_insn_if *cmd, char *arg, int cblen, struct tidx *tstate) 3386 { 3387 char *p; 3388 uint16_t uidx; 3389 3390 cmd->name[0] = '\0'; 3391 cmd->o.len |= F_INSN_SIZE(ipfw_insn_if); 3392 3393 CHECK_CMDLEN; 3394 3395 /* Parse the interface or address */ 3396 if (strcmp(arg, "any") == 0) 3397 cmd->o.len = 0; /* effectively ignore this command */ 3398 else if (strncmp(arg, "table(", 6) == 0) { 3399 if ((p = strchr(arg + 6, ')')) == NULL) 3400 errx(EX_DATAERR, "forgotten parenthesis: '%s'", arg); 3401 *p = '\0'; 3402 p = strchr(arg + 6, ','); 3403 if (p) 3404 *p++ = '\0'; 3405 if ((uidx = pack_table(tstate, arg + 6)) == 0) 3406 errx(EX_DATAERR, "Invalid table name: %s", arg + 6); 3407 3408 cmd->name[0] = '\1'; /* Special value indicating table */ 3409 cmd->p.kidx = uidx; 3410 } else if (!isdigit(*arg)) { 3411 strlcpy(cmd->name, arg, sizeof(cmd->name)); 3412 cmd->p.glob = strpbrk(arg, "*?[") != NULL ? 1 : 0; 3413 } else if (!inet_aton(arg, &cmd->p.ip)) 3414 errx(EX_DATAERR, "bad ip address ``%s''", arg); 3415 } 3416 3417 static void 3418 get_mac_addr_mask(const char *p, uint8_t *addr, uint8_t *mask) 3419 { 3420 int i; 3421 size_t l; 3422 char *ap, *ptr, *optr; 3423 struct ether_addr *mac; 3424 const char *macset = "0123456789abcdefABCDEF:"; 3425 3426 if (strcmp(p, "any") == 0) { 3427 for (i = 0; i < ETHER_ADDR_LEN; i++) 3428 addr[i] = mask[i] = 0; 3429 return; 3430 } 3431 3432 optr = ptr = strdup(p); 3433 if ((ap = strsep(&ptr, "&/")) != NULL && *ap != 0) { 3434 l = strlen(ap); 3435 if (strspn(ap, macset) != l || (mac = ether_aton(ap)) == NULL) 3436 errx(EX_DATAERR, "Incorrect MAC address"); 3437 bcopy(mac, addr, ETHER_ADDR_LEN); 3438 } else 3439 errx(EX_DATAERR, "Incorrect MAC address"); 3440 3441 if (ptr != NULL) { /* we have mask? */ 3442 if (p[ptr - optr - 1] == '/') { /* mask len */ 3443 long ml = strtol(ptr, &ap, 10); 3444 if (*ap != 0 || ml > ETHER_ADDR_LEN * 8 || ml < 0) 3445 errx(EX_DATAERR, "Incorrect mask length"); 3446 for (i = 0; ml > 0 && i < ETHER_ADDR_LEN; ml -= 8, i++) 3447 mask[i] = (ml >= 8) ? 0xff: (~0) << (8 - ml); 3448 } else { /* mask */ 3449 l = strlen(ptr); 3450 if (strspn(ptr, macset) != l || 3451 (mac = ether_aton(ptr)) == NULL) 3452 errx(EX_DATAERR, "Incorrect mask"); 3453 bcopy(mac, mask, ETHER_ADDR_LEN); 3454 } 3455 } else { /* default mask: ff:ff:ff:ff:ff:ff */ 3456 for (i = 0; i < ETHER_ADDR_LEN; i++) 3457 mask[i] = 0xff; 3458 } 3459 for (i = 0; i < ETHER_ADDR_LEN; i++) 3460 addr[i] &= mask[i]; 3461 3462 free(optr); 3463 } 3464 3465 /* 3466 * helper function, updates the pointer to cmd with the length 3467 * of the current command, and also cleans up the first word of 3468 * the new command in case it has been clobbered before. 3469 */ 3470 static ipfw_insn * 3471 next_cmd(ipfw_insn *cmd, int *len) 3472 { 3473 *len -= F_LEN(cmd); 3474 CHECK_LENGTH(*len, 0); 3475 cmd += F_LEN(cmd); 3476 bzero(cmd, sizeof(*cmd)); 3477 return cmd; 3478 } 3479 3480 /* 3481 * Takes arguments and copies them into a comment 3482 */ 3483 static void 3484 fill_comment(ipfw_insn *cmd, char **av, int cblen) 3485 { 3486 int i, l; 3487 char *p = (char *)(cmd + 1); 3488 3489 cmd->opcode = O_NOP; 3490 cmd->len = (cmd->len & (F_NOT | F_OR)); 3491 3492 /* Compute length of comment string. */ 3493 for (i = 0, l = 0; av[i] != NULL; i++) 3494 l += strlen(av[i]) + 1; 3495 if (l == 0) 3496 return; 3497 if (l > 84) 3498 errx(EX_DATAERR, 3499 "comment too long (max 80 chars)"); 3500 l = 1 + (l+3)/4; 3501 cmd->len = (cmd->len & (F_NOT | F_OR)) | l; 3502 CHECK_CMDLEN; 3503 3504 for (i = 0; av[i] != NULL; i++) { 3505 strcpy(p, av[i]); 3506 p += strlen(av[i]); 3507 *p++ = ' '; 3508 } 3509 *(--p) = '\0'; 3510 } 3511 3512 /* 3513 * A function to fill simple commands of size 1. 3514 * Existing flags are preserved. 3515 */ 3516 static void 3517 fill_cmd(ipfw_insn *cmd, enum ipfw_opcodes opcode, int flags, uint16_t arg) 3518 { 3519 cmd->opcode = opcode; 3520 cmd->len = ((cmd->len | flags) & (F_NOT | F_OR)) | 1; 3521 cmd->arg1 = arg; 3522 } 3523 3524 /* 3525 * Fetch and add the MAC address and type, with masks. This generates one or 3526 * two microinstructions, and returns the pointer to the last one. 3527 */ 3528 static ipfw_insn * 3529 add_mac(ipfw_insn *cmd, char *av[], int cblen) 3530 { 3531 ipfw_insn_mac *mac; 3532 3533 if ( ( av[0] == NULL ) || ( av[1] == NULL ) ) 3534 errx(EX_DATAERR, "MAC dst src"); 3535 3536 cmd->opcode = O_MACADDR2; 3537 cmd->len = (cmd->len & (F_NOT | F_OR)) | F_INSN_SIZE(ipfw_insn_mac); 3538 CHECK_CMDLEN; 3539 3540 mac = (ipfw_insn_mac *)cmd; 3541 get_mac_addr_mask(av[0], mac->addr, mac->mask); /* dst */ 3542 get_mac_addr_mask(av[1], &(mac->addr[ETHER_ADDR_LEN]), 3543 &(mac->mask[ETHER_ADDR_LEN])); /* src */ 3544 return cmd; 3545 } 3546 3547 static ipfw_insn * 3548 add_mactype(ipfw_insn *cmd, char *av, int cblen) 3549 { 3550 if (!av) 3551 errx(EX_DATAERR, "missing MAC type"); 3552 if (strcmp(av, "any") != 0) { /* we have a non-null type */ 3553 fill_newports((ipfw_insn_u16 *)cmd, av, IPPROTO_ETHERTYPE, 3554 cblen); 3555 cmd->opcode = O_MAC_TYPE; 3556 return cmd; 3557 } else 3558 return NULL; 3559 } 3560 3561 static ipfw_insn * 3562 add_proto0(ipfw_insn *cmd, char *av, u_char *protop) 3563 { 3564 struct protoent *pe; 3565 char *ep; 3566 int proto; 3567 3568 proto = strtol(av, &ep, 10); 3569 if (*ep != '\0' || proto <= 0) { 3570 if ((pe = getprotobyname(av)) == NULL) 3571 return NULL; 3572 proto = pe->p_proto; 3573 } 3574 3575 fill_cmd(cmd, O_PROTO, 0, proto); 3576 *protop = proto; 3577 return cmd; 3578 } 3579 3580 static ipfw_insn * 3581 add_proto(ipfw_insn *cmd, char *av, u_char *protop) 3582 { 3583 u_char proto = IPPROTO_IP; 3584 3585 if (_substrcmp(av, "all") == 0 || strcmp(av, "ip") == 0) 3586 ; /* do not set O_IP4 nor O_IP6 */ 3587 else if (strcmp(av, "ip4") == 0) 3588 /* explicit "just IPv4" rule */ 3589 fill_cmd(cmd, O_IP4, 0, 0); 3590 else if (strcmp(av, "ip6") == 0) { 3591 /* explicit "just IPv6" rule */ 3592 proto = IPPROTO_IPV6; 3593 fill_cmd(cmd, O_IP6, 0, 0); 3594 } else 3595 return add_proto0(cmd, av, protop); 3596 3597 *protop = proto; 3598 return cmd; 3599 } 3600 3601 static ipfw_insn * 3602 add_proto_compat(ipfw_insn *cmd, char *av, u_char *protop) 3603 { 3604 u_char proto = IPPROTO_IP; 3605 3606 if (_substrcmp(av, "all") == 0 || strcmp(av, "ip") == 0) 3607 ; /* do not set O_IP4 nor O_IP6 */ 3608 else if (strcmp(av, "ipv4") == 0 || strcmp(av, "ip4") == 0) 3609 /* explicit "just IPv4" rule */ 3610 fill_cmd(cmd, O_IP4, 0, 0); 3611 else if (strcmp(av, "ipv6") == 0 || strcmp(av, "ip6") == 0) { 3612 /* explicit "just IPv6" rule */ 3613 proto = IPPROTO_IPV6; 3614 fill_cmd(cmd, O_IP6, 0, 0); 3615 } else 3616 return add_proto0(cmd, av, protop); 3617 3618 *protop = proto; 3619 return cmd; 3620 } 3621 3622 static ipfw_insn * 3623 add_srcip(ipfw_insn *cmd, char *av, int cblen, struct tidx *tstate) 3624 { 3625 fill_ip((ipfw_insn_ip *)cmd, av, cblen, tstate); 3626 if (cmd->opcode == O_IP_DST_SET) /* set */ 3627 cmd->opcode = O_IP_SRC_SET; 3628 else if (cmd->opcode == O_IP_DST_LOOKUP) /* table */ 3629 cmd->opcode = O_IP_SRC_LOOKUP; 3630 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn)) /* me */ 3631 cmd->opcode = O_IP_SRC_ME; 3632 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_u32)) /* one IP */ 3633 cmd->opcode = O_IP_SRC; 3634 else /* addr/mask */ 3635 cmd->opcode = O_IP_SRC_MASK; 3636 return cmd; 3637 } 3638 3639 static ipfw_insn * 3640 add_dstip(ipfw_insn *cmd, char *av, int cblen, struct tidx *tstate) 3641 { 3642 fill_ip((ipfw_insn_ip *)cmd, av, cblen, tstate); 3643 if (cmd->opcode == O_IP_DST_SET) /* set */ 3644 ; 3645 else if (cmd->opcode == O_IP_DST_LOOKUP) /* table */ 3646 ; 3647 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn)) /* me */ 3648 cmd->opcode = O_IP_DST_ME; 3649 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_u32)) /* one IP */ 3650 cmd->opcode = O_IP_DST; 3651 else /* addr/mask */ 3652 cmd->opcode = O_IP_DST_MASK; 3653 return cmd; 3654 } 3655 3656 static struct _s_x f_reserved_keywords[] = { 3657 { "altq", TOK_OR }, 3658 { "//", TOK_OR }, 3659 { "diverted", TOK_OR }, 3660 { "dst-port", TOK_OR }, 3661 { "src-port", TOK_OR }, 3662 { "established", TOK_OR }, 3663 { "keep-state", TOK_OR }, 3664 { "frag", TOK_OR }, 3665 { "icmptypes", TOK_OR }, 3666 { "in", TOK_OR }, 3667 { "out", TOK_OR }, 3668 { "ip6", TOK_OR }, 3669 { "any", TOK_OR }, 3670 { "to", TOK_OR }, 3671 { "via", TOK_OR }, 3672 { "{", TOK_OR }, 3673 { NULL, 0 } /* terminator */ 3674 }; 3675 3676 static ipfw_insn * 3677 add_ports(ipfw_insn *cmd, char *av, u_char proto, int opcode, int cblen) 3678 { 3679 3680 if (match_token(f_reserved_keywords, av) != -1) 3681 return (NULL); 3682 3683 if (fill_newports((ipfw_insn_u16 *)cmd, av, proto, cblen)) { 3684 /* XXX todo: check that we have a protocol with ports */ 3685 cmd->opcode = opcode; 3686 return cmd; 3687 } 3688 return NULL; 3689 } 3690 3691 static ipfw_insn * 3692 add_src(ipfw_insn *cmd, char *av, u_char proto, int cblen, struct tidx *tstate) 3693 { 3694 struct in6_addr a; 3695 char *host, *ch, buf[INET6_ADDRSTRLEN]; 3696 ipfw_insn *ret = NULL; 3697 int len; 3698 3699 /* Copy first address in set if needed */ 3700 if ((ch = strpbrk(av, "/,")) != NULL) { 3701 len = ch - av; 3702 strlcpy(buf, av, sizeof(buf)); 3703 if (len < sizeof(buf)) 3704 buf[len] = '\0'; 3705 host = buf; 3706 } else 3707 host = av; 3708 3709 if (proto == IPPROTO_IPV6 || strcmp(av, "me6") == 0 || 3710 inet_pton(AF_INET6, host, &a) == 1) 3711 ret = add_srcip6(cmd, av, cblen, tstate); 3712 /* XXX: should check for IPv4, not !IPv6 */ 3713 if (ret == NULL && (proto == IPPROTO_IP || strcmp(av, "me") == 0 || 3714 inet_pton(AF_INET6, host, &a) != 1)) 3715 ret = add_srcip(cmd, av, cblen, tstate); 3716 if (ret == NULL && strcmp(av, "any") != 0) 3717 ret = cmd; 3718 3719 return ret; 3720 } 3721 3722 static ipfw_insn * 3723 add_dst(ipfw_insn *cmd, char *av, u_char proto, int cblen, struct tidx *tstate) 3724 { 3725 struct in6_addr a; 3726 char *host, *ch, buf[INET6_ADDRSTRLEN]; 3727 ipfw_insn *ret = NULL; 3728 int len; 3729 3730 /* Copy first address in set if needed */ 3731 if ((ch = strpbrk(av, "/,")) != NULL) { 3732 len = ch - av; 3733 strlcpy(buf, av, sizeof(buf)); 3734 if (len < sizeof(buf)) 3735 buf[len] = '\0'; 3736 host = buf; 3737 } else 3738 host = av; 3739 3740 if (proto == IPPROTO_IPV6 || strcmp(av, "me6") == 0 || 3741 inet_pton(AF_INET6, host, &a) == 1) 3742 ret = add_dstip6(cmd, av, cblen, tstate); 3743 /* XXX: should check for IPv4, not !IPv6 */ 3744 if (ret == NULL && (proto == IPPROTO_IP || strcmp(av, "me") == 0 || 3745 inet_pton(AF_INET6, host, &a) != 1)) 3746 ret = add_dstip(cmd, av, cblen, tstate); 3747 if (ret == NULL && strcmp(av, "any") != 0) 3748 ret = cmd; 3749 3750 return ret; 3751 } 3752 3753 /* 3754 * Parse arguments and assemble the microinstructions which make up a rule. 3755 * Rules are added into the 'rulebuf' and then copied in the correct order 3756 * into the actual rule. 3757 * 3758 * The syntax for a rule starts with the action, followed by 3759 * optional action parameters, and the various match patterns. 3760 * In the assembled microcode, the first opcode must be an O_PROBE_STATE 3761 * (generated if the rule includes a keep-state option), then the 3762 * various match patterns, log/altq actions, and the actual action. 3763 * 3764 */ 3765 void 3766 compile_rule(char *av[], uint32_t *rbuf, int *rbufsize, struct tidx *tstate) 3767 { 3768 /* 3769 * rules are added into the 'rulebuf' and then copied in 3770 * the correct order into the actual rule. 3771 * Some things that need to go out of order (prob, action etc.) 3772 * go into actbuf[]. 3773 */ 3774 static uint32_t actbuf[255], cmdbuf[255]; 3775 int rblen, ablen, cblen; 3776 3777 ipfw_insn *src, *dst, *cmd, *action, *prev=NULL; 3778 ipfw_insn *first_cmd; /* first match pattern */ 3779 3780 struct ip_fw_rule *rule; 3781 3782 /* 3783 * various flags used to record that we entered some fields. 3784 */ 3785 ipfw_insn *have_state = NULL; /* any state-related option */ 3786 int have_rstate = 0; 3787 ipfw_insn *have_log = NULL, *have_altq = NULL, *have_tag = NULL; 3788 ipfw_insn *have_skipcmd = NULL; 3789 size_t len; 3790 3791 int i; 3792 3793 int open_par = 0; /* open parenthesis ( */ 3794 3795 /* proto is here because it is used to fetch ports */ 3796 u_char proto = IPPROTO_IP; /* default protocol */ 3797 3798 double match_prob = 1; /* match probability, default is always match */ 3799 3800 bzero(actbuf, sizeof(actbuf)); /* actions go here */ 3801 bzero(cmdbuf, sizeof(cmdbuf)); 3802 bzero(rbuf, *rbufsize); 3803 3804 rule = (struct ip_fw_rule *)rbuf; 3805 cmd = (ipfw_insn *)cmdbuf; 3806 action = (ipfw_insn *)actbuf; 3807 3808 rblen = *rbufsize / sizeof(uint32_t); 3809 rblen -= sizeof(struct ip_fw_rule) / sizeof(uint32_t); 3810 ablen = sizeof(actbuf) / sizeof(actbuf[0]); 3811 cblen = sizeof(cmdbuf) / sizeof(cmdbuf[0]); 3812 cblen -= F_INSN_SIZE(ipfw_insn_u32) + 1; 3813 3814 #define CHECK_RBUFLEN(len) { CHECK_LENGTH(rblen, len); rblen -= len; } 3815 #define CHECK_ACTLEN CHECK_LENGTH(ablen, action->len) 3816 3817 av++; 3818 3819 /* [rule N] -- Rule number optional */ 3820 if (av[0] && isdigit(**av)) { 3821 rule->rulenum = atoi(*av); 3822 av++; 3823 } 3824 3825 /* [set N] -- set number (0..RESVD_SET), optional */ 3826 if (av[0] && av[1] && _substrcmp(*av, "set") == 0) { 3827 int set = strtoul(av[1], NULL, 10); 3828 if (set < 0 || set > RESVD_SET) 3829 errx(EX_DATAERR, "illegal set %s", av[1]); 3830 rule->set = set; 3831 tstate->set = set; 3832 av += 2; 3833 } 3834 3835 /* [prob D] -- match probability, optional */ 3836 if (av[0] && av[1] && _substrcmp(*av, "prob") == 0) { 3837 match_prob = strtod(av[1], NULL); 3838 3839 if (match_prob <= 0 || match_prob > 1) 3840 errx(EX_DATAERR, "illegal match prob. %s", av[1]); 3841 av += 2; 3842 } 3843 3844 /* action -- mandatory */ 3845 NEED1("missing action"); 3846 i = match_token(rule_actions, *av); 3847 av++; 3848 action->len = 1; /* default */ 3849 CHECK_ACTLEN; 3850 switch(i) { 3851 case TOK_CHECKSTATE: 3852 have_state = action; 3853 action->opcode = O_CHECK_STATE; 3854 if (*av == NULL || 3855 match_token(rule_options, *av) == TOK_COMMENT) { 3856 action->arg1 = pack_object(tstate, 3857 default_state_name, IPFW_TLV_STATE_NAME); 3858 break; 3859 } 3860 if (*av[0] == ':') { 3861 if (strcmp(*av + 1, "any") == 0) 3862 action->arg1 = 0; 3863 else if (state_check_name(*av + 1) == 0) 3864 action->arg1 = pack_object(tstate, *av + 1, 3865 IPFW_TLV_STATE_NAME); 3866 else 3867 errx(EX_DATAERR, "Invalid state name %s", 3868 *av); 3869 av++; 3870 break; 3871 } 3872 errx(EX_DATAERR, "Invalid state name %s", *av); 3873 break; 3874 3875 case TOK_ABORT: 3876 action->opcode = O_REJECT; 3877 action->arg1 = ICMP_REJECT_ABORT; 3878 break; 3879 3880 case TOK_ABORT6: 3881 action->opcode = O_UNREACH6; 3882 action->arg1 = ICMP6_UNREACH_ABORT; 3883 break; 3884 3885 case TOK_ACCEPT: 3886 action->opcode = O_ACCEPT; 3887 break; 3888 3889 case TOK_DENY: 3890 action->opcode = O_DENY; 3891 action->arg1 = 0; 3892 break; 3893 3894 case TOK_REJECT: 3895 action->opcode = O_REJECT; 3896 action->arg1 = ICMP_UNREACH_HOST; 3897 break; 3898 3899 case TOK_RESET: 3900 action->opcode = O_REJECT; 3901 action->arg1 = ICMP_REJECT_RST; 3902 break; 3903 3904 case TOK_RESET6: 3905 action->opcode = O_UNREACH6; 3906 action->arg1 = ICMP6_UNREACH_RST; 3907 break; 3908 3909 case TOK_UNREACH: 3910 action->opcode = O_REJECT; 3911 NEED1("missing reject code"); 3912 fill_reject_code(&action->arg1, *av); 3913 av++; 3914 break; 3915 3916 case TOK_UNREACH6: 3917 action->opcode = O_UNREACH6; 3918 NEED1("missing unreach code"); 3919 fill_unreach6_code(&action->arg1, *av); 3920 av++; 3921 break; 3922 3923 case TOK_COUNT: 3924 action->opcode = O_COUNT; 3925 break; 3926 3927 case TOK_NAT: 3928 action->opcode = O_NAT; 3929 action->len = F_INSN_SIZE(ipfw_insn_nat); 3930 CHECK_ACTLEN; 3931 if (*av != NULL && _substrcmp(*av, "global") == 0) { 3932 action->arg1 = IP_FW_NAT44_GLOBAL; 3933 av++; 3934 break; 3935 } else 3936 goto chkarg; 3937 case TOK_QUEUE: 3938 action->opcode = O_QUEUE; 3939 goto chkarg; 3940 case TOK_PIPE: 3941 action->opcode = O_PIPE; 3942 goto chkarg; 3943 case TOK_SKIPTO: 3944 action->opcode = O_SKIPTO; 3945 goto chkarg; 3946 case TOK_NETGRAPH: 3947 action->opcode = O_NETGRAPH; 3948 goto chkarg; 3949 case TOK_NGTEE: 3950 action->opcode = O_NGTEE; 3951 goto chkarg; 3952 case TOK_DIVERT: 3953 action->opcode = O_DIVERT; 3954 goto chkarg; 3955 case TOK_TEE: 3956 action->opcode = O_TEE; 3957 goto chkarg; 3958 case TOK_CALL: 3959 action->opcode = O_CALLRETURN; 3960 chkarg: 3961 if (!av[0]) 3962 errx(EX_USAGE, "missing argument for %s", *(av - 1)); 3963 if (isdigit(**av)) { 3964 action->arg1 = strtoul(*av, NULL, 10); 3965 if (action->arg1 <= 0 || action->arg1 >= IP_FW_TABLEARG) 3966 errx(EX_DATAERR, "illegal argument for %s", 3967 *(av - 1)); 3968 } else if (_substrcmp(*av, "tablearg") == 0) { 3969 action->arg1 = IP_FW_TARG; 3970 } else if (i == TOK_DIVERT || i == TOK_TEE) { 3971 struct servent *s; 3972 setservent(1); 3973 s = getservbyname(av[0], "divert"); 3974 if (s != NULL) 3975 action->arg1 = ntohs(s->s_port); 3976 else 3977 errx(EX_DATAERR, "illegal divert/tee port"); 3978 } else 3979 errx(EX_DATAERR, "illegal argument for %s", *(av - 1)); 3980 av++; 3981 break; 3982 3983 case TOK_FORWARD: { 3984 /* 3985 * Locate the address-port separator (':' or ','). 3986 * Could be one of the following: 3987 * hostname:port 3988 * IPv4 a.b.c.d,port 3989 * IPv4 a.b.c.d:port 3990 * IPv6 w:x:y::z,port 3991 * The ':' can only be used with hostname and IPv4 address. 3992 * XXX-BZ Should we also support [w:x:y::z]:port? 3993 */ 3994 struct sockaddr_storage result; 3995 struct addrinfo *res; 3996 char *s, *end; 3997 int family; 3998 u_short port_number; 3999 4000 NEED1("missing forward address[:port]"); 4001 4002 /* 4003 * locate the address-port separator (':' or ',') 4004 */ 4005 s = strchr(*av, ','); 4006 if (s == NULL) { 4007 /* Distinguish between IPv4:port and IPv6 cases. */ 4008 s = strchr(*av, ':'); 4009 if (s && strchr(s+1, ':')) 4010 s = NULL; /* no port */ 4011 } 4012 4013 port_number = 0; 4014 if (s != NULL) { 4015 /* Terminate host portion and set s to start of port. */ 4016 *(s++) = '\0'; 4017 i = strtoport(s, &end, 0 /* base */, 0 /* proto */); 4018 if (s == end) 4019 errx(EX_DATAERR, 4020 "illegal forwarding port ``%s''", s); 4021 port_number = (u_short)i; 4022 } 4023 4024 if (_substrcmp(*av, "tablearg") == 0) { 4025 family = PF_INET; 4026 ((struct sockaddr_in*)&result)->sin_addr.s_addr = 4027 INADDR_ANY; 4028 } else { 4029 /* 4030 * Resolve the host name or address to a family and a 4031 * network representation of the address. 4032 */ 4033 if (getaddrinfo(*av, NULL, NULL, &res)) 4034 errx(EX_DATAERR, NULL); 4035 /* Just use the first host in the answer. */ 4036 family = res->ai_family; 4037 memcpy(&result, res->ai_addr, res->ai_addrlen); 4038 freeaddrinfo(res); 4039 } 4040 4041 if (family == PF_INET) { 4042 ipfw_insn_sa *p = (ipfw_insn_sa *)action; 4043 4044 action->opcode = O_FORWARD_IP; 4045 action->len = F_INSN_SIZE(ipfw_insn_sa); 4046 CHECK_ACTLEN; 4047 4048 /* 4049 * In the kernel we assume AF_INET and use only 4050 * sin_port and sin_addr. Remember to set sin_len as 4051 * the routing code seems to use it too. 4052 */ 4053 p->sa.sin_len = sizeof(struct sockaddr_in); 4054 p->sa.sin_family = AF_INET; 4055 p->sa.sin_port = port_number; 4056 p->sa.sin_addr.s_addr = 4057 ((struct sockaddr_in *)&result)->sin_addr.s_addr; 4058 } else if (family == PF_INET6) { 4059 ipfw_insn_sa6 *p = (ipfw_insn_sa6 *)action; 4060 4061 action->opcode = O_FORWARD_IP6; 4062 action->len = F_INSN_SIZE(ipfw_insn_sa6); 4063 CHECK_ACTLEN; 4064 4065 p->sa.sin6_len = sizeof(struct sockaddr_in6); 4066 p->sa.sin6_family = AF_INET6; 4067 p->sa.sin6_port = port_number; 4068 p->sa.sin6_flowinfo = 0; 4069 p->sa.sin6_scope_id = 4070 ((struct sockaddr_in6 *)&result)->sin6_scope_id; 4071 bcopy(&((struct sockaddr_in6*)&result)->sin6_addr, 4072 &p->sa.sin6_addr, sizeof(p->sa.sin6_addr)); 4073 } else { 4074 errx(EX_DATAERR, "Invalid address family in forward action"); 4075 } 4076 av++; 4077 break; 4078 } 4079 case TOK_COMMENT: 4080 /* pretend it is a 'count' rule followed by the comment */ 4081 action->opcode = O_COUNT; 4082 av--; /* go back... */ 4083 break; 4084 4085 case TOK_SETFIB: 4086 { 4087 int numfibs; 4088 size_t intsize = sizeof(int); 4089 4090 action->opcode = O_SETFIB; 4091 NEED1("missing fib number"); 4092 if (_substrcmp(*av, "tablearg") == 0) { 4093 action->arg1 = IP_FW_TARG; 4094 } else { 4095 action->arg1 = strtoul(*av, NULL, 10); 4096 if (sysctlbyname("net.fibs", &numfibs, &intsize, 4097 NULL, 0) == -1) 4098 errx(EX_DATAERR, "fibs not suported.\n"); 4099 if (action->arg1 >= numfibs) /* Temporary */ 4100 errx(EX_DATAERR, "fib too large.\n"); 4101 /* Add high-order bit to fib to make room for tablearg*/ 4102 action->arg1 |= 0x8000; 4103 } 4104 av++; 4105 break; 4106 } 4107 4108 case TOK_SETDSCP: 4109 { 4110 int code; 4111 4112 action->opcode = O_SETDSCP; 4113 NEED1("missing DSCP code"); 4114 if (_substrcmp(*av, "tablearg") == 0) { 4115 action->arg1 = IP_FW_TARG; 4116 } else { 4117 if (isalpha(*av[0])) { 4118 if ((code = match_token(f_ipdscp, *av)) == -1) 4119 errx(EX_DATAERR, "Unknown DSCP code"); 4120 action->arg1 = code; 4121 } else 4122 action->arg1 = strtoul(*av, NULL, 10); 4123 /* 4124 * Add high-order bit to DSCP to make room 4125 * for tablearg 4126 */ 4127 action->arg1 |= 0x8000; 4128 } 4129 av++; 4130 break; 4131 } 4132 4133 case TOK_REASS: 4134 action->opcode = O_REASS; 4135 break; 4136 4137 case TOK_RETURN: 4138 fill_cmd(action, O_CALLRETURN, F_NOT, 0); 4139 break; 4140 4141 case TOK_TCPSETMSS: { 4142 u_long mss; 4143 uint16_t idx; 4144 4145 idx = pack_object(tstate, "tcp-setmss", IPFW_TLV_EACTION); 4146 if (idx == 0) 4147 errx(EX_DATAERR, "pack_object failed"); 4148 fill_cmd(action, O_EXTERNAL_ACTION, 0, idx); 4149 NEED1("Missing MSS value"); 4150 action = next_cmd(action, &ablen); 4151 action->len = 1; 4152 CHECK_ACTLEN; 4153 mss = strtoul(*av, NULL, 10); 4154 if (mss == 0 || mss > UINT16_MAX) 4155 errx(EX_USAGE, "invalid MSS value %s", *av); 4156 fill_cmd(action, O_EXTERNAL_DATA, 0, (uint16_t)mss); 4157 av++; 4158 break; 4159 } 4160 4161 default: 4162 av--; 4163 if (match_token(rule_eactions, *av) == -1) 4164 errx(EX_DATAERR, "invalid action %s\n", *av); 4165 /* 4166 * External actions support. 4167 * XXX: we support only syntax with instance name. 4168 * For known external actions (from rule_eactions list) 4169 * we can handle syntax directly. But with `eaction' 4170 * keyword we can use only `eaction <name> <instance>' 4171 * syntax. 4172 */ 4173 case TOK_EACTION: { 4174 uint16_t idx; 4175 4176 NEED1("Missing eaction name"); 4177 if (eaction_check_name(*av) != 0) 4178 errx(EX_DATAERR, "Invalid eaction name %s", *av); 4179 idx = pack_object(tstate, *av, IPFW_TLV_EACTION); 4180 if (idx == 0) 4181 errx(EX_DATAERR, "pack_object failed"); 4182 fill_cmd(action, O_EXTERNAL_ACTION, 0, idx); 4183 av++; 4184 NEED1("Missing eaction instance name"); 4185 action = next_cmd(action, &ablen); 4186 action->len = 1; 4187 CHECK_ACTLEN; 4188 if (eaction_check_name(*av) != 0) 4189 errx(EX_DATAERR, "Invalid eaction instance name %s", 4190 *av); 4191 /* 4192 * External action instance object has TLV type depended 4193 * from the external action name object index. Since we 4194 * currently don't know this index, use zero as TLV type. 4195 */ 4196 idx = pack_object(tstate, *av, 0); 4197 if (idx == 0) 4198 errx(EX_DATAERR, "pack_object failed"); 4199 fill_cmd(action, O_EXTERNAL_INSTANCE, 0, idx); 4200 av++; 4201 } 4202 } 4203 action = next_cmd(action, &ablen); 4204 4205 /* 4206 * [altq queuename] -- altq tag, optional 4207 * [log [logamount N]] -- log, optional 4208 * 4209 * If they exist, it go first in the cmdbuf, but then it is 4210 * skipped in the copy section to the end of the buffer. 4211 */ 4212 while (av[0] != NULL && (i = match_token(rule_action_params, *av)) != -1) { 4213 av++; 4214 switch (i) { 4215 case TOK_LOG: 4216 { 4217 ipfw_insn_log *c = (ipfw_insn_log *)cmd; 4218 int l; 4219 4220 if (have_log) 4221 errx(EX_DATAERR, 4222 "log cannot be specified more than once"); 4223 have_log = (ipfw_insn *)c; 4224 cmd->len = F_INSN_SIZE(ipfw_insn_log); 4225 CHECK_CMDLEN; 4226 cmd->opcode = O_LOG; 4227 if (av[0] && _substrcmp(*av, "logamount") == 0) { 4228 av++; 4229 NEED1("logamount requires argument"); 4230 l = atoi(*av); 4231 if (l < 0) 4232 errx(EX_DATAERR, 4233 "logamount must be positive"); 4234 c->max_log = l; 4235 av++; 4236 } else { 4237 len = sizeof(c->max_log); 4238 if (sysctlbyname("net.inet.ip.fw.verbose_limit", 4239 &c->max_log, &len, NULL, 0) == -1) { 4240 if (co.test_only) { 4241 c->max_log = 0; 4242 break; 4243 } 4244 errx(1, "sysctlbyname(\"%s\")", 4245 "net.inet.ip.fw.verbose_limit"); 4246 } 4247 } 4248 } 4249 break; 4250 4251 #ifndef NO_ALTQ 4252 case TOK_ALTQ: 4253 { 4254 ipfw_insn_altq *a = (ipfw_insn_altq *)cmd; 4255 4256 NEED1("missing altq queue name"); 4257 if (have_altq) 4258 errx(EX_DATAERR, 4259 "altq cannot be specified more than once"); 4260 have_altq = (ipfw_insn *)a; 4261 cmd->len = F_INSN_SIZE(ipfw_insn_altq); 4262 CHECK_CMDLEN; 4263 cmd->opcode = O_ALTQ; 4264 a->qid = altq_name_to_qid(*av); 4265 av++; 4266 } 4267 break; 4268 #endif 4269 4270 case TOK_TAG: 4271 case TOK_UNTAG: { 4272 uint16_t tag; 4273 4274 if (have_tag) 4275 errx(EX_USAGE, "tag and untag cannot be " 4276 "specified more than once"); 4277 GET_UINT_ARG(tag, IPFW_ARG_MIN, IPFW_ARG_MAX, i, 4278 rule_action_params); 4279 have_tag = cmd; 4280 fill_cmd(cmd, O_TAG, (i == TOK_TAG) ? 0: F_NOT, tag); 4281 av++; 4282 break; 4283 } 4284 4285 default: 4286 abort(); 4287 } 4288 cmd = next_cmd(cmd, &cblen); 4289 } 4290 4291 if (have_state) { /* must be a check-state, we are done */ 4292 if (*av != NULL && 4293 match_token(rule_options, *av) == TOK_COMMENT) { 4294 /* check-state has a comment */ 4295 av++; 4296 fill_comment(cmd, av, cblen); 4297 cmd = next_cmd(cmd, &cblen); 4298 av[0] = NULL; 4299 } 4300 goto done; 4301 } 4302 4303 #define OR_START(target) \ 4304 if (av[0] && (*av[0] == '(' || *av[0] == '{')) { \ 4305 if (open_par) \ 4306 errx(EX_USAGE, "nested \"(\" not allowed\n"); \ 4307 prev = NULL; \ 4308 open_par = 1; \ 4309 if ( (av[0])[1] == '\0') { \ 4310 av++; \ 4311 } else \ 4312 (*av)++; \ 4313 } \ 4314 target: \ 4315 4316 4317 #define CLOSE_PAR \ 4318 if (open_par) { \ 4319 if (av[0] && ( \ 4320 strcmp(*av, ")") == 0 || \ 4321 strcmp(*av, "}") == 0)) { \ 4322 prev = NULL; \ 4323 open_par = 0; \ 4324 av++; \ 4325 } else \ 4326 errx(EX_USAGE, "missing \")\"\n"); \ 4327 } 4328 4329 #define NOT_BLOCK \ 4330 if (av[0] && _substrcmp(*av, "not") == 0) { \ 4331 if (cmd->len & F_NOT) \ 4332 errx(EX_USAGE, "double \"not\" not allowed\n"); \ 4333 cmd->len |= F_NOT; \ 4334 av++; \ 4335 } 4336 4337 #define OR_BLOCK(target) \ 4338 if (av[0] && _substrcmp(*av, "or") == 0) { \ 4339 if (prev == NULL || open_par == 0) \ 4340 errx(EX_DATAERR, "invalid OR block"); \ 4341 prev->len |= F_OR; \ 4342 av++; \ 4343 goto target; \ 4344 } \ 4345 CLOSE_PAR; 4346 4347 first_cmd = cmd; 4348 4349 #if 0 4350 /* 4351 * MAC addresses, optional. 4352 * If we have this, we skip the part "proto from src to dst" 4353 * and jump straight to the option parsing. 4354 */ 4355 NOT_BLOCK; 4356 NEED1("missing protocol"); 4357 if (_substrcmp(*av, "MAC") == 0 || 4358 _substrcmp(*av, "mac") == 0) { 4359 av++; /* the "MAC" keyword */ 4360 add_mac(cmd, av); /* exits in case of errors */ 4361 cmd = next_cmd(cmd); 4362 av += 2; /* dst-mac and src-mac */ 4363 NOT_BLOCK; 4364 NEED1("missing mac type"); 4365 if (add_mactype(cmd, av[0])) 4366 cmd = next_cmd(cmd); 4367 av++; /* any or mac-type */ 4368 goto read_options; 4369 } 4370 #endif 4371 4372 /* 4373 * protocol, mandatory 4374 */ 4375 OR_START(get_proto); 4376 NOT_BLOCK; 4377 NEED1("missing protocol"); 4378 if (add_proto_compat(cmd, *av, &proto)) { 4379 av++; 4380 if (F_LEN(cmd) != 0) { 4381 prev = cmd; 4382 cmd = next_cmd(cmd, &cblen); 4383 } 4384 } else if (first_cmd != cmd) { 4385 errx(EX_DATAERR, "invalid protocol ``%s''", *av); 4386 } else { 4387 rule->flags |= IPFW_RULE_JUSTOPTS; 4388 goto read_options; 4389 } 4390 OR_BLOCK(get_proto); 4391 4392 /* 4393 * "from", mandatory 4394 */ 4395 if ((av[0] == NULL) || _substrcmp(*av, "from") != 0) 4396 errx(EX_USAGE, "missing ``from''"); 4397 av++; 4398 4399 /* 4400 * source IP, mandatory 4401 */ 4402 OR_START(source_ip); 4403 NOT_BLOCK; /* optional "not" */ 4404 NEED1("missing source address"); 4405 if (add_src(cmd, *av, proto, cblen, tstate)) { 4406 av++; 4407 if (F_LEN(cmd) != 0) { /* ! any */ 4408 prev = cmd; 4409 cmd = next_cmd(cmd, &cblen); 4410 } 4411 } else 4412 errx(EX_USAGE, "bad source address %s", *av); 4413 OR_BLOCK(source_ip); 4414 4415 /* 4416 * source ports, optional 4417 */ 4418 NOT_BLOCK; /* optional "not" */ 4419 if ( av[0] != NULL ) { 4420 if (_substrcmp(*av, "any") == 0 || 4421 add_ports(cmd, *av, proto, O_IP_SRCPORT, cblen)) { 4422 av++; 4423 if (F_LEN(cmd) != 0) 4424 cmd = next_cmd(cmd, &cblen); 4425 } 4426 } 4427 4428 /* 4429 * "to", mandatory 4430 */ 4431 if ( (av[0] == NULL) || _substrcmp(*av, "to") != 0 ) 4432 errx(EX_USAGE, "missing ``to''"); 4433 av++; 4434 4435 /* 4436 * destination, mandatory 4437 */ 4438 OR_START(dest_ip); 4439 NOT_BLOCK; /* optional "not" */ 4440 NEED1("missing dst address"); 4441 if (add_dst(cmd, *av, proto, cblen, tstate)) { 4442 av++; 4443 if (F_LEN(cmd) != 0) { /* ! any */ 4444 prev = cmd; 4445 cmd = next_cmd(cmd, &cblen); 4446 } 4447 } else 4448 errx( EX_USAGE, "bad destination address %s", *av); 4449 OR_BLOCK(dest_ip); 4450 4451 /* 4452 * dest. ports, optional 4453 */ 4454 NOT_BLOCK; /* optional "not" */ 4455 if (av[0]) { 4456 if (_substrcmp(*av, "any") == 0 || 4457 add_ports(cmd, *av, proto, O_IP_DSTPORT, cblen)) { 4458 av++; 4459 if (F_LEN(cmd) != 0) 4460 cmd = next_cmd(cmd, &cblen); 4461 } 4462 } 4463 4464 read_options: 4465 prev = NULL; 4466 while ( av[0] != NULL ) { 4467 char *s; 4468 ipfw_insn_u32 *cmd32; /* alias for cmd */ 4469 4470 s = *av; 4471 cmd32 = (ipfw_insn_u32 *)cmd; 4472 4473 if (*s == '!') { /* alternate syntax for NOT */ 4474 if (cmd->len & F_NOT) 4475 errx(EX_USAGE, "double \"not\" not allowed\n"); 4476 cmd->len = F_NOT; 4477 s++; 4478 } 4479 i = match_token(rule_options, s); 4480 av++; 4481 switch(i) { 4482 case TOK_NOT: 4483 if (cmd->len & F_NOT) 4484 errx(EX_USAGE, "double \"not\" not allowed\n"); 4485 cmd->len = F_NOT; 4486 break; 4487 4488 case TOK_OR: 4489 if (open_par == 0 || prev == NULL) 4490 errx(EX_USAGE, "invalid \"or\" block\n"); 4491 prev->len |= F_OR; 4492 break; 4493 4494 case TOK_STARTBRACE: 4495 if (open_par) 4496 errx(EX_USAGE, "+nested \"(\" not allowed\n"); 4497 open_par = 1; 4498 break; 4499 4500 case TOK_ENDBRACE: 4501 if (!open_par) 4502 errx(EX_USAGE, "+missing \")\"\n"); 4503 open_par = 0; 4504 prev = NULL; 4505 break; 4506 4507 case TOK_IN: 4508 fill_cmd(cmd, O_IN, 0, 0); 4509 break; 4510 4511 case TOK_OUT: 4512 cmd->len ^= F_NOT; /* toggle F_NOT */ 4513 fill_cmd(cmd, O_IN, 0, 0); 4514 break; 4515 4516 case TOK_DIVERTED: 4517 fill_cmd(cmd, O_DIVERTED, 0, 3); 4518 break; 4519 4520 case TOK_DIVERTEDLOOPBACK: 4521 fill_cmd(cmd, O_DIVERTED, 0, 1); 4522 break; 4523 4524 case TOK_DIVERTEDOUTPUT: 4525 fill_cmd(cmd, O_DIVERTED, 0, 2); 4526 break; 4527 4528 case TOK_FRAG: 4529 fill_cmd(cmd, O_FRAG, 0, 0); 4530 break; 4531 4532 case TOK_LAYER2: 4533 fill_cmd(cmd, O_LAYER2, 0, 0); 4534 break; 4535 4536 case TOK_XMIT: 4537 case TOK_RECV: 4538 case TOK_VIA: 4539 NEED1("recv, xmit, via require interface name" 4540 " or address"); 4541 fill_iface((ipfw_insn_if *)cmd, av[0], cblen, tstate); 4542 av++; 4543 if (F_LEN(cmd) == 0) /* not a valid address */ 4544 break; 4545 if (i == TOK_XMIT) 4546 cmd->opcode = O_XMIT; 4547 else if (i == TOK_RECV) 4548 cmd->opcode = O_RECV; 4549 else if (i == TOK_VIA) 4550 cmd->opcode = O_VIA; 4551 break; 4552 4553 case TOK_ICMPTYPES: 4554 NEED1("icmptypes requires list of types"); 4555 fill_icmptypes((ipfw_insn_u32 *)cmd, *av); 4556 av++; 4557 break; 4558 4559 case TOK_ICMP6TYPES: 4560 NEED1("icmptypes requires list of types"); 4561 fill_icmp6types((ipfw_insn_icmp6 *)cmd, *av, cblen); 4562 av++; 4563 break; 4564 4565 case TOK_IPTTL: 4566 NEED1("ipttl requires TTL"); 4567 if (strpbrk(*av, "-,")) { 4568 if (!add_ports(cmd, *av, 0, O_IPTTL, cblen)) 4569 errx(EX_DATAERR, "invalid ipttl %s", *av); 4570 } else 4571 fill_cmd(cmd, O_IPTTL, 0, strtoul(*av, NULL, 0)); 4572 av++; 4573 break; 4574 4575 case TOK_IPID: 4576 NEED1("ipid requires id"); 4577 if (strpbrk(*av, "-,")) { 4578 if (!add_ports(cmd, *av, 0, O_IPID, cblen)) 4579 errx(EX_DATAERR, "invalid ipid %s", *av); 4580 } else 4581 fill_cmd(cmd, O_IPID, 0, strtoul(*av, NULL, 0)); 4582 av++; 4583 break; 4584 4585 case TOK_IPLEN: 4586 NEED1("iplen requires length"); 4587 if (strpbrk(*av, "-,")) { 4588 if (!add_ports(cmd, *av, 0, O_IPLEN, cblen)) 4589 errx(EX_DATAERR, "invalid ip len %s", *av); 4590 } else 4591 fill_cmd(cmd, O_IPLEN, 0, strtoul(*av, NULL, 0)); 4592 av++; 4593 break; 4594 4595 case TOK_IPVER: 4596 NEED1("ipver requires version"); 4597 fill_cmd(cmd, O_IPVER, 0, strtoul(*av, NULL, 0)); 4598 av++; 4599 break; 4600 4601 case TOK_IPPRECEDENCE: 4602 NEED1("ipprecedence requires value"); 4603 fill_cmd(cmd, O_IPPRECEDENCE, 0, 4604 (strtoul(*av, NULL, 0) & 7) << 5); 4605 av++; 4606 break; 4607 4608 case TOK_DSCP: 4609 NEED1("missing DSCP code"); 4610 fill_dscp(cmd, *av, cblen); 4611 av++; 4612 break; 4613 4614 case TOK_IPOPTS: 4615 NEED1("missing argument for ipoptions"); 4616 fill_flags_cmd(cmd, O_IPOPT, f_ipopts, *av); 4617 av++; 4618 break; 4619 4620 case TOK_IPTOS: 4621 NEED1("missing argument for iptos"); 4622 fill_flags_cmd(cmd, O_IPTOS, f_iptos, *av); 4623 av++; 4624 break; 4625 4626 case TOK_UID: 4627 NEED1("uid requires argument"); 4628 { 4629 char *end; 4630 uid_t uid; 4631 struct passwd *pwd; 4632 4633 cmd->opcode = O_UID; 4634 uid = strtoul(*av, &end, 0); 4635 pwd = (*end == '\0') ? getpwuid(uid) : getpwnam(*av); 4636 if (pwd == NULL) 4637 errx(EX_DATAERR, "uid \"%s\" nonexistent", *av); 4638 cmd32->d[0] = pwd->pw_uid; 4639 cmd->len |= F_INSN_SIZE(ipfw_insn_u32); 4640 av++; 4641 } 4642 break; 4643 4644 case TOK_GID: 4645 NEED1("gid requires argument"); 4646 { 4647 char *end; 4648 gid_t gid; 4649 struct group *grp; 4650 4651 cmd->opcode = O_GID; 4652 gid = strtoul(*av, &end, 0); 4653 grp = (*end == '\0') ? getgrgid(gid) : getgrnam(*av); 4654 if (grp == NULL) 4655 errx(EX_DATAERR, "gid \"%s\" nonexistent", *av); 4656 cmd32->d[0] = grp->gr_gid; 4657 cmd->len |= F_INSN_SIZE(ipfw_insn_u32); 4658 av++; 4659 } 4660 break; 4661 4662 case TOK_JAIL: 4663 NEED1("jail requires argument"); 4664 { 4665 int jid; 4666 4667 cmd->opcode = O_JAIL; 4668 jid = jail_getid(*av); 4669 if (jid < 0) 4670 errx(EX_DATAERR, "%s", jail_errmsg); 4671 cmd32->d[0] = (uint32_t)jid; 4672 cmd->len |= F_INSN_SIZE(ipfw_insn_u32); 4673 av++; 4674 } 4675 break; 4676 4677 case TOK_ESTAB: 4678 fill_cmd(cmd, O_ESTAB, 0, 0); 4679 break; 4680 4681 case TOK_SETUP: 4682 fill_cmd(cmd, O_TCPFLAGS, 0, 4683 (TH_SYN) | ( (TH_ACK) & 0xff) <<8 ); 4684 break; 4685 4686 case TOK_TCPDATALEN: 4687 NEED1("tcpdatalen requires length"); 4688 if (strpbrk(*av, "-,")) { 4689 if (!add_ports(cmd, *av, 0, O_TCPDATALEN, cblen)) 4690 errx(EX_DATAERR, "invalid tcpdata len %s", *av); 4691 } else 4692 fill_cmd(cmd, O_TCPDATALEN, 0, 4693 strtoul(*av, NULL, 0)); 4694 av++; 4695 break; 4696 4697 case TOK_TCPOPTS: 4698 NEED1("missing argument for tcpoptions"); 4699 fill_flags_cmd(cmd, O_TCPOPTS, f_tcpopts, *av); 4700 av++; 4701 break; 4702 4703 case TOK_TCPSEQ: 4704 case TOK_TCPACK: 4705 NEED1("tcpseq/tcpack requires argument"); 4706 cmd->len = F_INSN_SIZE(ipfw_insn_u32); 4707 cmd->opcode = (i == TOK_TCPSEQ) ? O_TCPSEQ : O_TCPACK; 4708 cmd32->d[0] = htonl(strtoul(*av, NULL, 0)); 4709 av++; 4710 break; 4711 4712 case TOK_TCPWIN: 4713 NEED1("tcpwin requires length"); 4714 if (strpbrk(*av, "-,")) { 4715 if (!add_ports(cmd, *av, 0, O_TCPWIN, cblen)) 4716 errx(EX_DATAERR, "invalid tcpwin len %s", *av); 4717 } else 4718 fill_cmd(cmd, O_TCPWIN, 0, 4719 strtoul(*av, NULL, 0)); 4720 av++; 4721 break; 4722 4723 case TOK_TCPFLAGS: 4724 NEED1("missing argument for tcpflags"); 4725 cmd->opcode = O_TCPFLAGS; 4726 fill_flags_cmd(cmd, O_TCPFLAGS, f_tcpflags, *av); 4727 av++; 4728 break; 4729 4730 case TOK_KEEPSTATE: 4731 case TOK_RECORDSTATE: { 4732 uint16_t uidx; 4733 4734 if (open_par) 4735 errx(EX_USAGE, "keep-state or record-state cannot be part " 4736 "of an or block"); 4737 if (have_state) 4738 errx(EX_USAGE, "only one of keep-state, record-state, " 4739 " limit and set-limit is allowed"); 4740 if (*av != NULL && *av[0] == ':') { 4741 if (state_check_name(*av + 1) != 0) 4742 errx(EX_DATAERR, 4743 "Invalid state name %s", *av); 4744 uidx = pack_object(tstate, *av + 1, 4745 IPFW_TLV_STATE_NAME); 4746 av++; 4747 } else 4748 uidx = pack_object(tstate, default_state_name, 4749 IPFW_TLV_STATE_NAME); 4750 have_state = cmd; 4751 have_rstate = i == TOK_RECORDSTATE; 4752 fill_cmd(cmd, O_KEEP_STATE, 0, uidx); 4753 break; 4754 } 4755 4756 case TOK_LIMIT: 4757 case TOK_SETLIMIT: { 4758 ipfw_insn_limit *c = (ipfw_insn_limit *)cmd; 4759 int val; 4760 4761 if (open_par) 4762 errx(EX_USAGE, 4763 "limit or set-limit cannot be part of an or block"); 4764 if (have_state) 4765 errx(EX_USAGE, "only one of keep-state, record-state, " 4766 " limit and set-limit is allowed"); 4767 have_state = cmd; 4768 have_rstate = i == TOK_SETLIMIT; 4769 4770 cmd->len = F_INSN_SIZE(ipfw_insn_limit); 4771 CHECK_CMDLEN; 4772 cmd->opcode = O_LIMIT; 4773 c->limit_mask = c->conn_limit = 0; 4774 4775 while ( av[0] != NULL ) { 4776 if ((val = match_token(limit_masks, *av)) <= 0) 4777 break; 4778 c->limit_mask |= val; 4779 av++; 4780 } 4781 4782 if (c->limit_mask == 0) 4783 errx(EX_USAGE, "limit: missing limit mask"); 4784 4785 GET_UINT_ARG(c->conn_limit, IPFW_ARG_MIN, IPFW_ARG_MAX, 4786 TOK_LIMIT, rule_options); 4787 av++; 4788 4789 if (*av != NULL && *av[0] == ':') { 4790 if (state_check_name(*av + 1) != 0) 4791 errx(EX_DATAERR, 4792 "Invalid state name %s", *av); 4793 cmd->arg1 = pack_object(tstate, *av + 1, 4794 IPFW_TLV_STATE_NAME); 4795 av++; 4796 } else 4797 cmd->arg1 = pack_object(tstate, 4798 default_state_name, IPFW_TLV_STATE_NAME); 4799 break; 4800 } 4801 4802 case TOK_PROTO: 4803 NEED1("missing protocol"); 4804 if (add_proto(cmd, *av, &proto)) { 4805 av++; 4806 } else 4807 errx(EX_DATAERR, "invalid protocol ``%s''", 4808 *av); 4809 break; 4810 4811 case TOK_SRCIP: 4812 NEED1("missing source IP"); 4813 if (add_srcip(cmd, *av, cblen, tstate)) { 4814 av++; 4815 } 4816 break; 4817 4818 case TOK_DSTIP: 4819 NEED1("missing destination IP"); 4820 if (add_dstip(cmd, *av, cblen, tstate)) { 4821 av++; 4822 } 4823 break; 4824 4825 case TOK_SRCIP6: 4826 NEED1("missing source IP6"); 4827 if (add_srcip6(cmd, *av, cblen, tstate)) { 4828 av++; 4829 } 4830 break; 4831 4832 case TOK_DSTIP6: 4833 NEED1("missing destination IP6"); 4834 if (add_dstip6(cmd, *av, cblen, tstate)) { 4835 av++; 4836 } 4837 break; 4838 4839 case TOK_SRCPORT: 4840 NEED1("missing source port"); 4841 if (_substrcmp(*av, "any") == 0 || 4842 add_ports(cmd, *av, proto, O_IP_SRCPORT, cblen)) { 4843 av++; 4844 } else 4845 errx(EX_DATAERR, "invalid source port %s", *av); 4846 break; 4847 4848 case TOK_DSTPORT: 4849 NEED1("missing destination port"); 4850 if (_substrcmp(*av, "any") == 0 || 4851 add_ports(cmd, *av, proto, O_IP_DSTPORT, cblen)) { 4852 av++; 4853 } else 4854 errx(EX_DATAERR, "invalid destination port %s", 4855 *av); 4856 break; 4857 4858 case TOK_MAC: 4859 if (add_mac(cmd, av, cblen)) 4860 av += 2; 4861 break; 4862 4863 case TOK_MACTYPE: 4864 NEED1("missing mac type"); 4865 if (!add_mactype(cmd, *av, cblen)) 4866 errx(EX_DATAERR, "invalid mac type %s", *av); 4867 av++; 4868 break; 4869 4870 case TOK_VERREVPATH: 4871 fill_cmd(cmd, O_VERREVPATH, 0, 0); 4872 break; 4873 4874 case TOK_VERSRCREACH: 4875 fill_cmd(cmd, O_VERSRCREACH, 0, 0); 4876 break; 4877 4878 case TOK_ANTISPOOF: 4879 fill_cmd(cmd, O_ANTISPOOF, 0, 0); 4880 break; 4881 4882 case TOK_IPSEC: 4883 fill_cmd(cmd, O_IPSEC, 0, 0); 4884 break; 4885 4886 case TOK_IPV6: 4887 fill_cmd(cmd, O_IP6, 0, 0); 4888 break; 4889 4890 case TOK_IPV4: 4891 fill_cmd(cmd, O_IP4, 0, 0); 4892 break; 4893 4894 case TOK_EXT6HDR: 4895 fill_ext6hdr( cmd, *av ); 4896 av++; 4897 break; 4898 4899 case TOK_FLOWID: 4900 if (proto != IPPROTO_IPV6 ) 4901 errx( EX_USAGE, "flow-id filter is active " 4902 "only for ipv6 protocol\n"); 4903 fill_flow6( (ipfw_insn_u32 *) cmd, *av, cblen); 4904 av++; 4905 break; 4906 4907 case TOK_COMMENT: 4908 fill_comment(cmd, av, cblen); 4909 av[0]=NULL; 4910 break; 4911 4912 case TOK_TAGGED: 4913 if (av[0] && strpbrk(*av, "-,")) { 4914 if (!add_ports(cmd, *av, 0, O_TAGGED, cblen)) 4915 errx(EX_DATAERR, "tagged: invalid tag" 4916 " list: %s", *av); 4917 } 4918 else { 4919 uint16_t tag; 4920 4921 GET_UINT_ARG(tag, IPFW_ARG_MIN, IPFW_ARG_MAX, 4922 TOK_TAGGED, rule_options); 4923 fill_cmd(cmd, O_TAGGED, 0, tag); 4924 } 4925 av++; 4926 break; 4927 4928 case TOK_FIB: 4929 NEED1("fib requires fib number"); 4930 fill_cmd(cmd, O_FIB, 0, strtoul(*av, NULL, 0)); 4931 av++; 4932 break; 4933 case TOK_SOCKARG: 4934 fill_cmd(cmd, O_SOCKARG, 0, 0); 4935 break; 4936 4937 case TOK_LOOKUP: { 4938 ipfw_insn_u32 *c = (ipfw_insn_u32 *)cmd; 4939 int j; 4940 4941 if (!av[0] || !av[1]) 4942 errx(EX_USAGE, "format: lookup argument tablenum"); 4943 cmd->opcode = O_IP_DST_LOOKUP; 4944 cmd->len |= F_INSN_SIZE(ipfw_insn) + 2; 4945 i = match_token(rule_options, *av); 4946 for (j = 0; lookup_key[j] >= 0 ; j++) { 4947 if (i == lookup_key[j]) 4948 break; 4949 } 4950 if (lookup_key[j] <= 0) 4951 errx(EX_USAGE, "format: cannot lookup on %s", *av); 4952 __PAST_END(c->d, 1) = j; // i converted to option 4953 av++; 4954 4955 if ((j = pack_table(tstate, *av)) == 0) 4956 errx(EX_DATAERR, "Invalid table name: %s", *av); 4957 4958 cmd->arg1 = j; 4959 av++; 4960 } 4961 break; 4962 case TOK_FLOW: 4963 NEED1("missing table name"); 4964 if (strncmp(*av, "table(", 6) != 0) 4965 errx(EX_DATAERR, 4966 "enclose table name into \"table()\""); 4967 fill_table(cmd, *av, O_IP_FLOW_LOOKUP, tstate); 4968 av++; 4969 break; 4970 4971 case TOK_SKIPACTION: 4972 if (have_skipcmd) 4973 errx(EX_USAGE, "only one defer-action " 4974 "is allowed"); 4975 have_skipcmd = cmd; 4976 fill_cmd(cmd, O_SKIP_ACTION, 0, 0); 4977 break; 4978 4979 default: 4980 errx(EX_USAGE, "unrecognised option [%d] %s\n", i, s); 4981 } 4982 if (F_LEN(cmd) > 0) { /* prepare to advance */ 4983 prev = cmd; 4984 cmd = next_cmd(cmd, &cblen); 4985 } 4986 } 4987 4988 done: 4989 4990 if (!have_state && have_skipcmd) 4991 warnx("Rule contains \"defer-immediate-action\" " 4992 "and doesn't contain any state-related options."); 4993 4994 /* 4995 * Now copy stuff into the rule. 4996 * If we have a keep-state option, the first instruction 4997 * must be a PROBE_STATE (which is generated here). 4998 * If we have a LOG option, it was stored as the first command, 4999 * and now must be moved to the top of the action part. 5000 */ 5001 dst = (ipfw_insn *)rule->cmd; 5002 5003 /* 5004 * First thing to write into the command stream is the match probability. 5005 */ 5006 if (match_prob != 1) { /* 1 means always match */ 5007 dst->opcode = O_PROB; 5008 dst->len = 2; 5009 *((int32_t *)(dst+1)) = (int32_t)(match_prob * 0x7fffffff); 5010 dst += dst->len; 5011 } 5012 5013 /* 5014 * generate O_PROBE_STATE if necessary 5015 */ 5016 if (have_state && have_state->opcode != O_CHECK_STATE && !have_rstate) { 5017 fill_cmd(dst, O_PROBE_STATE, 0, have_state->arg1); 5018 dst = next_cmd(dst, &rblen); 5019 } 5020 5021 /* 5022 * copy all commands but O_LOG, O_KEEP_STATE, O_LIMIT, O_ALTQ, O_TAG, 5023 * O_SKIP_ACTION 5024 */ 5025 for (src = (ipfw_insn *)cmdbuf; src != cmd; src += i) { 5026 i = F_LEN(src); 5027 CHECK_RBUFLEN(i); 5028 5029 switch (src->opcode) { 5030 case O_LOG: 5031 case O_KEEP_STATE: 5032 case O_LIMIT: 5033 case O_ALTQ: 5034 case O_TAG: 5035 case O_SKIP_ACTION: 5036 break; 5037 default: 5038 bcopy(src, dst, i * sizeof(uint32_t)); 5039 dst += i; 5040 } 5041 } 5042 5043 /* 5044 * put back the have_state command as last opcode 5045 */ 5046 if (have_state && have_state->opcode != O_CHECK_STATE) { 5047 i = F_LEN(have_state); 5048 CHECK_RBUFLEN(i); 5049 bcopy(have_state, dst, i * sizeof(uint32_t)); 5050 dst += i; 5051 } 5052 5053 /* 5054 * put back the have_skipcmd command as very last opcode 5055 */ 5056 if (have_skipcmd) { 5057 i = F_LEN(have_skipcmd); 5058 CHECK_RBUFLEN(i); 5059 bcopy(have_skipcmd, dst, i * sizeof(uint32_t)); 5060 dst += i; 5061 } 5062 5063 /* 5064 * start action section 5065 */ 5066 rule->act_ofs = dst - rule->cmd; 5067 5068 /* put back O_LOG, O_ALTQ, O_TAG if necessary */ 5069 if (have_log) { 5070 i = F_LEN(have_log); 5071 CHECK_RBUFLEN(i); 5072 bcopy(have_log, dst, i * sizeof(uint32_t)); 5073 dst += i; 5074 } 5075 if (have_altq) { 5076 i = F_LEN(have_altq); 5077 CHECK_RBUFLEN(i); 5078 bcopy(have_altq, dst, i * sizeof(uint32_t)); 5079 dst += i; 5080 } 5081 if (have_tag) { 5082 i = F_LEN(have_tag); 5083 CHECK_RBUFLEN(i); 5084 bcopy(have_tag, dst, i * sizeof(uint32_t)); 5085 dst += i; 5086 } 5087 5088 /* 5089 * copy all other actions 5090 */ 5091 for (src = (ipfw_insn *)actbuf; src != action; src += i) { 5092 i = F_LEN(src); 5093 CHECK_RBUFLEN(i); 5094 bcopy(src, dst, i * sizeof(uint32_t)); 5095 dst += i; 5096 } 5097 5098 rule->cmd_len = (uint32_t *)dst - (uint32_t *)(rule->cmd); 5099 *rbufsize = (char *)dst - (char *)rule; 5100 } 5101 5102 static int 5103 compare_ntlv(const void *_a, const void *_b) 5104 { 5105 ipfw_obj_ntlv *a, *b; 5106 5107 a = (ipfw_obj_ntlv *)_a; 5108 b = (ipfw_obj_ntlv *)_b; 5109 5110 if (a->set < b->set) 5111 return (-1); 5112 else if (a->set > b->set) 5113 return (1); 5114 5115 if (a->idx < b->idx) 5116 return (-1); 5117 else if (a->idx > b->idx) 5118 return (1); 5119 5120 if (a->head.type < b->head.type) 5121 return (-1); 5122 else if (a->head.type > b->head.type) 5123 return (1); 5124 5125 return (0); 5126 } 5127 5128 /* 5129 * Provide kernel with sorted list of referenced objects 5130 */ 5131 static void 5132 object_sort_ctlv(ipfw_obj_ctlv *ctlv) 5133 { 5134 5135 qsort(ctlv + 1, ctlv->count, ctlv->objsize, compare_ntlv); 5136 } 5137 5138 struct object_kt { 5139 uint16_t uidx; 5140 uint16_t type; 5141 }; 5142 static int 5143 compare_object_kntlv(const void *k, const void *v) 5144 { 5145 ipfw_obj_ntlv *ntlv; 5146 struct object_kt key; 5147 5148 key = *((struct object_kt *)k); 5149 ntlv = (ipfw_obj_ntlv *)v; 5150 5151 if (key.uidx < ntlv->idx) 5152 return (-1); 5153 else if (key.uidx > ntlv->idx) 5154 return (1); 5155 5156 if (key.type < ntlv->head.type) 5157 return (-1); 5158 else if (key.type > ntlv->head.type) 5159 return (1); 5160 5161 return (0); 5162 } 5163 5164 /* 5165 * Finds object name in @ctlv by @idx and @type. 5166 * Uses the following facts: 5167 * 1) All TLVs are the same size 5168 * 2) Kernel implementation provides already sorted list. 5169 * 5170 * Returns table name or NULL. 5171 */ 5172 static char * 5173 object_search_ctlv(ipfw_obj_ctlv *ctlv, uint16_t idx, uint16_t type) 5174 { 5175 ipfw_obj_ntlv *ntlv; 5176 struct object_kt key; 5177 5178 key.uidx = idx; 5179 key.type = type; 5180 5181 ntlv = bsearch(&key, (ctlv + 1), ctlv->count, ctlv->objsize, 5182 compare_object_kntlv); 5183 5184 if (ntlv != NULL) 5185 return (ntlv->name); 5186 5187 return (NULL); 5188 } 5189 5190 static char * 5191 table_search_ctlv(ipfw_obj_ctlv *ctlv, uint16_t idx) 5192 { 5193 5194 return (object_search_ctlv(ctlv, idx, IPFW_TLV_TBL_NAME)); 5195 } 5196 5197 /* 5198 * Adds one or more rules to ipfw chain. 5199 * Data layout: 5200 * Request: 5201 * [ 5202 * ip_fw3_opheader 5203 * [ ipfw_obj_ctlv(IPFW_TLV_TBL_LIST) ipfw_obj_ntlv x N ] (optional *1) 5204 * [ ipfw_obj_ctlv(IPFW_TLV_RULE_LIST) [ ip_fw_rule ip_fw_insn ] x N ] (*2) (*3) 5205 * ] 5206 * Reply: 5207 * [ 5208 * ip_fw3_opheader 5209 * [ ipfw_obj_ctlv(IPFW_TLV_TBL_LIST) ipfw_obj_ntlv x N ] (optional) 5210 * [ ipfw_obj_ctlv(IPFW_TLV_RULE_LIST) [ ip_fw_rule ip_fw_insn ] x N ] 5211 * ] 5212 * 5213 * Rules in reply are modified to store their actual ruleset number. 5214 * 5215 * (*1) TLVs inside IPFW_TLV_TBL_LIST needs to be sorted ascending 5216 * according to their idx field and there has to be no duplicates. 5217 * (*2) Numbered rules inside IPFW_TLV_RULE_LIST needs to be sorted ascending. 5218 * (*3) Each ip_fw structure needs to be aligned to u64 boundary. 5219 */ 5220 void 5221 ipfw_add(char *av[]) 5222 { 5223 uint32_t rulebuf[1024]; 5224 int rbufsize, default_off, tlen, rlen; 5225 size_t sz; 5226 struct tidx ts; 5227 struct ip_fw_rule *rule; 5228 caddr_t tbuf; 5229 ip_fw3_opheader *op3; 5230 ipfw_obj_ctlv *ctlv, *tstate; 5231 5232 rbufsize = sizeof(rulebuf); 5233 memset(rulebuf, 0, rbufsize); 5234 memset(&ts, 0, sizeof(ts)); 5235 5236 /* Optimize case with no tables */ 5237 default_off = sizeof(ipfw_obj_ctlv) + sizeof(ip_fw3_opheader); 5238 op3 = (ip_fw3_opheader *)rulebuf; 5239 ctlv = (ipfw_obj_ctlv *)(op3 + 1); 5240 rule = (struct ip_fw_rule *)(ctlv + 1); 5241 rbufsize -= default_off; 5242 5243 compile_rule(av, (uint32_t *)rule, &rbufsize, &ts); 5244 /* Align rule size to u64 boundary */ 5245 rlen = roundup2(rbufsize, sizeof(uint64_t)); 5246 5247 tbuf = NULL; 5248 sz = 0; 5249 tstate = NULL; 5250 if (ts.count != 0) { 5251 /* Some tables. We have to alloc more data */ 5252 tlen = ts.count * sizeof(ipfw_obj_ntlv); 5253 sz = default_off + sizeof(ipfw_obj_ctlv) + tlen + rlen; 5254 5255 if ((tbuf = calloc(1, sz)) == NULL) 5256 err(EX_UNAVAILABLE, "malloc() failed for IP_FW_ADD"); 5257 op3 = (ip_fw3_opheader *)tbuf; 5258 /* Tables first */ 5259 ctlv = (ipfw_obj_ctlv *)(op3 + 1); 5260 ctlv->head.type = IPFW_TLV_TBLNAME_LIST; 5261 ctlv->head.length = sizeof(ipfw_obj_ctlv) + tlen; 5262 ctlv->count = ts.count; 5263 ctlv->objsize = sizeof(ipfw_obj_ntlv); 5264 memcpy(ctlv + 1, ts.idx, tlen); 5265 object_sort_ctlv(ctlv); 5266 tstate = ctlv; 5267 /* Rule next */ 5268 ctlv = (ipfw_obj_ctlv *)((caddr_t)ctlv + ctlv->head.length); 5269 ctlv->head.type = IPFW_TLV_RULE_LIST; 5270 ctlv->head.length = sizeof(ipfw_obj_ctlv) + rlen; 5271 ctlv->count = 1; 5272 memcpy(ctlv + 1, rule, rbufsize); 5273 } else { 5274 /* Simply add header */ 5275 sz = rlen + default_off; 5276 memset(ctlv, 0, sizeof(*ctlv)); 5277 ctlv->head.type = IPFW_TLV_RULE_LIST; 5278 ctlv->head.length = sizeof(ipfw_obj_ctlv) + rlen; 5279 ctlv->count = 1; 5280 } 5281 5282 if (do_get3(IP_FW_XADD, op3, &sz) != 0) 5283 err(EX_UNAVAILABLE, "getsockopt(%s)", "IP_FW_XADD"); 5284 5285 if (!co.do_quiet) { 5286 struct format_opts sfo; 5287 struct buf_pr bp; 5288 memset(&sfo, 0, sizeof(sfo)); 5289 sfo.tstate = tstate; 5290 sfo.set_mask = (uint32_t)(-1); 5291 bp_alloc(&bp, 4096); 5292 show_static_rule(&co, &sfo, &bp, rule, NULL); 5293 printf("%s", bp.buf); 5294 bp_free(&bp); 5295 } 5296 5297 if (tbuf != NULL) 5298 free(tbuf); 5299 5300 if (ts.idx != NULL) 5301 free(ts.idx); 5302 } 5303 5304 /* 5305 * clear the counters or the log counters. 5306 * optname has the following values: 5307 * 0 (zero both counters and logging) 5308 * 1 (zero logging only) 5309 */ 5310 void 5311 ipfw_zero(int ac, char *av[], int optname) 5312 { 5313 ipfw_range_tlv rt; 5314 char const *errstr; 5315 char const *name = optname ? "RESETLOG" : "ZERO"; 5316 uint32_t arg; 5317 int failed = EX_OK; 5318 5319 optname = optname ? IP_FW_XRESETLOG : IP_FW_XZERO; 5320 av++; ac--; 5321 5322 if (ac == 0) { 5323 /* clear all entries */ 5324 memset(&rt, 0, sizeof(rt)); 5325 rt.flags = IPFW_RCFLAG_ALL; 5326 if (do_range_cmd(optname, &rt) < 0) 5327 err(EX_UNAVAILABLE, "setsockopt(IP_FW_X%s)", name); 5328 if (!co.do_quiet) 5329 printf("%s.\n", optname == IP_FW_XZERO ? 5330 "Accounting cleared":"Logging counts reset"); 5331 5332 return; 5333 } 5334 5335 while (ac) { 5336 /* Rule number */ 5337 if (isdigit(**av)) { 5338 arg = strtonum(*av, 0, 0xffff, &errstr); 5339 if (errstr) 5340 errx(EX_DATAERR, 5341 "invalid rule number %s\n", *av); 5342 memset(&rt, 0, sizeof(rt)); 5343 rt.start_rule = arg; 5344 rt.end_rule = arg; 5345 rt.flags |= IPFW_RCFLAG_RANGE; 5346 if (co.use_set != 0) { 5347 rt.set = co.use_set - 1; 5348 rt.flags |= IPFW_RCFLAG_SET; 5349 } 5350 if (do_range_cmd(optname, &rt) != 0) { 5351 warn("rule %u: setsockopt(IP_FW_X%s)", 5352 arg, name); 5353 failed = EX_UNAVAILABLE; 5354 } else if (rt.new_set == 0) { 5355 printf("Entry %d not found\n", arg); 5356 failed = EX_UNAVAILABLE; 5357 } else if (!co.do_quiet) 5358 printf("Entry %d %s.\n", arg, 5359 optname == IP_FW_XZERO ? 5360 "cleared" : "logging count reset"); 5361 } else { 5362 errx(EX_USAGE, "invalid rule number ``%s''", *av); 5363 } 5364 av++; ac--; 5365 } 5366 if (failed != EX_OK) 5367 exit(failed); 5368 } 5369 5370 void 5371 ipfw_flush(int force) 5372 { 5373 ipfw_range_tlv rt; 5374 5375 if (!force && !co.do_quiet) { /* need to ask user */ 5376 int c; 5377 5378 printf("Are you sure? [yn] "); 5379 fflush(stdout); 5380 do { 5381 c = toupper(getc(stdin)); 5382 while (c != '\n' && getc(stdin) != '\n') 5383 if (feof(stdin)) 5384 return; /* and do not flush */ 5385 } while (c != 'Y' && c != 'N'); 5386 printf("\n"); 5387 if (c == 'N') /* user said no */ 5388 return; 5389 } 5390 if (co.do_pipe) { 5391 dummynet_flush(); 5392 return; 5393 } 5394 /* `ipfw set N flush` - is the same that `ipfw delete set N` */ 5395 memset(&rt, 0, sizeof(rt)); 5396 if (co.use_set != 0) { 5397 rt.set = co.use_set - 1; 5398 rt.flags = IPFW_RCFLAG_SET; 5399 } else 5400 rt.flags = IPFW_RCFLAG_ALL; 5401 if (do_range_cmd(IP_FW_XDEL, &rt) != 0) 5402 err(EX_UNAVAILABLE, "setsockopt(IP_FW_XDEL)"); 5403 if (!co.do_quiet) 5404 printf("Flushed all %s.\n", co.do_pipe ? "pipes" : "rules"); 5405 } 5406 5407 static struct _s_x intcmds[] = { 5408 { "talist", TOK_TALIST }, 5409 { "iflist", TOK_IFLIST }, 5410 { "olist", TOK_OLIST }, 5411 { "vlist", TOK_VLIST }, 5412 { NULL, 0 } 5413 }; 5414 5415 static struct _s_x otypes[] = { 5416 { "EACTION", IPFW_TLV_EACTION }, 5417 { "DYNSTATE", IPFW_TLV_STATE_NAME }, 5418 { NULL, 0 } 5419 }; 5420 5421 static const char* 5422 lookup_eaction_name(ipfw_obj_ntlv *ntlv, int cnt, uint16_t type) 5423 { 5424 const char *name; 5425 int i; 5426 5427 name = NULL; 5428 for (i = 0; i < cnt; i++) { 5429 if (ntlv[i].head.type != IPFW_TLV_EACTION) 5430 continue; 5431 if (IPFW_TLV_EACTION_NAME(ntlv[i].idx) != type) 5432 continue; 5433 name = ntlv[i].name; 5434 break; 5435 } 5436 return (name); 5437 } 5438 5439 static void 5440 ipfw_list_objects(int ac, char *av[]) 5441 { 5442 ipfw_obj_lheader req, *olh; 5443 ipfw_obj_ntlv *ntlv; 5444 const char *name; 5445 size_t sz; 5446 int i; 5447 5448 memset(&req, 0, sizeof(req)); 5449 sz = sizeof(req); 5450 if (do_get3(IP_FW_DUMP_SRVOBJECTS, &req.opheader, &sz) != 0) 5451 if (errno != ENOMEM) 5452 return; 5453 5454 sz = req.size; 5455 if ((olh = calloc(1, sz)) == NULL) 5456 return; 5457 5458 olh->size = sz; 5459 if (do_get3(IP_FW_DUMP_SRVOBJECTS, &olh->opheader, &sz) != 0) { 5460 free(olh); 5461 return; 5462 } 5463 5464 if (olh->count > 0) 5465 printf("Objects list:\n"); 5466 else 5467 printf("There are no objects\n"); 5468 ntlv = (ipfw_obj_ntlv *)(olh + 1); 5469 for (i = 0; i < olh->count; i++) { 5470 name = match_value(otypes, ntlv->head.type); 5471 if (name == NULL) 5472 name = lookup_eaction_name( 5473 (ipfw_obj_ntlv *)(olh + 1), olh->count, 5474 ntlv->head.type); 5475 if (name == NULL) 5476 printf(" kidx: %4d\ttype: %10d\tname: %s\n", 5477 ntlv->idx, ntlv->head.type, ntlv->name); 5478 else 5479 printf(" kidx: %4d\ttype: %10s\tname: %s\n", 5480 ntlv->idx, name, ntlv->name); 5481 ntlv++; 5482 } 5483 free(olh); 5484 } 5485 5486 void 5487 ipfw_internal_handler(int ac, char *av[]) 5488 { 5489 int tcmd; 5490 5491 ac--; av++; 5492 NEED1("internal cmd required"); 5493 5494 if ((tcmd = match_token(intcmds, *av)) == -1) 5495 errx(EX_USAGE, "invalid internal sub-cmd: %s", *av); 5496 5497 switch (tcmd) { 5498 case TOK_IFLIST: 5499 ipfw_list_tifaces(); 5500 break; 5501 case TOK_TALIST: 5502 ipfw_list_ta(ac, av); 5503 break; 5504 case TOK_OLIST: 5505 ipfw_list_objects(ac, av); 5506 break; 5507 case TOK_VLIST: 5508 ipfw_list_values(ac, av); 5509 break; 5510 } 5511 } 5512 5513 static int 5514 ipfw_get_tracked_ifaces(ipfw_obj_lheader **polh) 5515 { 5516 ipfw_obj_lheader req, *olh; 5517 size_t sz; 5518 5519 memset(&req, 0, sizeof(req)); 5520 sz = sizeof(req); 5521 5522 if (do_get3(IP_FW_XIFLIST, &req.opheader, &sz) != 0) { 5523 if (errno != ENOMEM) 5524 return (errno); 5525 } 5526 5527 sz = req.size; 5528 if ((olh = calloc(1, sz)) == NULL) 5529 return (ENOMEM); 5530 5531 olh->size = sz; 5532 if (do_get3(IP_FW_XIFLIST, &olh->opheader, &sz) != 0) { 5533 free(olh); 5534 return (errno); 5535 } 5536 5537 *polh = olh; 5538 return (0); 5539 } 5540 5541 static int 5542 ifinfo_cmp(const void *a, const void *b) 5543 { 5544 ipfw_iface_info *ia, *ib; 5545 5546 ia = (ipfw_iface_info *)a; 5547 ib = (ipfw_iface_info *)b; 5548 5549 return (stringnum_cmp(ia->ifname, ib->ifname)); 5550 } 5551 5552 /* 5553 * Retrieves table list from kernel, 5554 * optionally sorts it and calls requested function for each table. 5555 * Returns 0 on success. 5556 */ 5557 static void 5558 ipfw_list_tifaces() 5559 { 5560 ipfw_obj_lheader *olh; 5561 ipfw_iface_info *info; 5562 int i, error; 5563 5564 if ((error = ipfw_get_tracked_ifaces(&olh)) != 0) 5565 err(EX_OSERR, "Unable to request ipfw tracked interface list"); 5566 5567 5568 qsort(olh + 1, olh->count, olh->objsize, ifinfo_cmp); 5569 5570 info = (ipfw_iface_info *)(olh + 1); 5571 for (i = 0; i < olh->count; i++) { 5572 if (info->flags & IPFW_IFFLAG_RESOLVED) 5573 printf("%s ifindex: %d refcount: %u changes: %u\n", 5574 info->ifname, info->ifindex, info->refcnt, 5575 info->gencnt); 5576 else 5577 printf("%s ifindex: unresolved refcount: %u changes: %u\n", 5578 info->ifname, info->refcnt, info->gencnt); 5579 info = (ipfw_iface_info *)((caddr_t)info + olh->objsize); 5580 } 5581 5582 free(olh); 5583 } 5584 5585 5586 5587 5588