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 <netdb.h> 36 #include <pwd.h> 37 #include <stdio.h> 38 #include <stdarg.h> 39 #include <stdlib.h> 40 #include <string.h> 41 #include <sysexits.h> 42 #include <time.h> /* ctime */ 43 #include <timeconv.h> /* _long_to_time */ 44 #include <unistd.h> 45 #include <fcntl.h> 46 #include <stddef.h> /* offsetof */ 47 48 #include <net/ethernet.h> 49 #include <net/if.h> /* only IFNAMSIZ */ 50 #include <netinet/in.h> 51 #include <netinet/in_systm.h> /* only n_short, n_long */ 52 #include <netinet/ip.h> 53 #include <netinet/ip_icmp.h> 54 #include <netinet/ip_fw.h> 55 #include <netinet/tcp.h> 56 #include <arpa/inet.h> 57 58 struct cmdline_opts co; /* global options */ 59 60 struct format_opts { 61 int bcwidth; 62 int pcwidth; 63 int show_counters; 64 uint32_t set_mask; /* enabled sets mask */ 65 uint32_t flags; /* request flags */ 66 uint32_t first; /* first rule to request */ 67 uint32_t last; /* last rule to request */ 68 uint32_t dcnt; /* number of dynamic states */ 69 ipfw_obj_ctlv *tstate; /* table state data */ 70 }; 71 72 int resvd_set_number = RESVD_SET; 73 74 int ipfw_socket = -1; 75 76 #define CHECK_LENGTH(v, len) do { \ 77 if ((v) < (len)) \ 78 errx(EX_DATAERR, "Rule too long"); \ 79 } while (0) 80 /* 81 * Check if we have enough space in cmd buffer. Note that since 82 * first 8? u32 words are reserved by reserved header, full cmd 83 * buffer can't be used, so we need to protect from buffer overrun 84 * only. At the beginnig, cblen is less than actual buffer size by 85 * size of ipfw_insn_u32 instruction + 1 u32 work. This eliminates need 86 * for checking small instructions fitting in given range. 87 * We also (ab)use the fact that ipfw_insn is always the first field 88 * for any custom instruction. 89 */ 90 #define CHECK_CMDLEN CHECK_LENGTH(cblen, F_LEN((ipfw_insn *)cmd)) 91 92 #define GET_UINT_ARG(arg, min, max, tok, s_x) do { \ 93 if (!av[0]) \ 94 errx(EX_USAGE, "%s: missing argument", match_value(s_x, tok)); \ 95 if (_substrcmp(*av, "tablearg") == 0) { \ 96 arg = IP_FW_TARG; \ 97 break; \ 98 } \ 99 \ 100 { \ 101 long _xval; \ 102 char *end; \ 103 \ 104 _xval = strtol(*av, &end, 10); \ 105 \ 106 if (!isdigit(**av) || *end != '\0' || (_xval == 0 && errno == EINVAL)) \ 107 errx(EX_DATAERR, "%s: invalid argument: %s", \ 108 match_value(s_x, tok), *av); \ 109 \ 110 if (errno == ERANGE || _xval < min || _xval > max) \ 111 errx(EX_DATAERR, "%s: argument is out of range (%u..%u): %s", \ 112 match_value(s_x, tok), min, max, *av); \ 113 \ 114 if (_xval == IP_FW_TARG) \ 115 errx(EX_DATAERR, "%s: illegal argument value: %s", \ 116 match_value(s_x, tok), *av); \ 117 arg = _xval; \ 118 } \ 119 } while (0) 120 121 static struct _s_x f_tcpflags[] = { 122 { "syn", TH_SYN }, 123 { "fin", TH_FIN }, 124 { "ack", TH_ACK }, 125 { "psh", TH_PUSH }, 126 { "rst", TH_RST }, 127 { "urg", TH_URG }, 128 { "tcp flag", 0 }, 129 { NULL, 0 } 130 }; 131 132 static struct _s_x f_tcpopts[] = { 133 { "mss", IP_FW_TCPOPT_MSS }, 134 { "maxseg", IP_FW_TCPOPT_MSS }, 135 { "window", IP_FW_TCPOPT_WINDOW }, 136 { "sack", IP_FW_TCPOPT_SACK }, 137 { "ts", IP_FW_TCPOPT_TS }, 138 { "timestamp", IP_FW_TCPOPT_TS }, 139 { "cc", IP_FW_TCPOPT_CC }, 140 { "tcp option", 0 }, 141 { NULL, 0 } 142 }; 143 144 /* 145 * IP options span the range 0 to 255 so we need to remap them 146 * (though in fact only the low 5 bits are significant). 147 */ 148 static struct _s_x f_ipopts[] = { 149 { "ssrr", IP_FW_IPOPT_SSRR}, 150 { "lsrr", IP_FW_IPOPT_LSRR}, 151 { "rr", IP_FW_IPOPT_RR}, 152 { "ts", IP_FW_IPOPT_TS}, 153 { "ip option", 0 }, 154 { NULL, 0 } 155 }; 156 157 static struct _s_x f_iptos[] = { 158 { "lowdelay", IPTOS_LOWDELAY}, 159 { "throughput", IPTOS_THROUGHPUT}, 160 { "reliability", IPTOS_RELIABILITY}, 161 { "mincost", IPTOS_MINCOST}, 162 { "congestion", IPTOS_ECN_CE}, 163 { "ecntransport", IPTOS_ECN_ECT0}, 164 { "ip tos option", 0}, 165 { NULL, 0 } 166 }; 167 168 struct _s_x f_ipdscp[] = { 169 { "af11", IPTOS_DSCP_AF11 >> 2 }, /* 001010 */ 170 { "af12", IPTOS_DSCP_AF12 >> 2 }, /* 001100 */ 171 { "af13", IPTOS_DSCP_AF13 >> 2 }, /* 001110 */ 172 { "af21", IPTOS_DSCP_AF21 >> 2 }, /* 010010 */ 173 { "af22", IPTOS_DSCP_AF22 >> 2 }, /* 010100 */ 174 { "af23", IPTOS_DSCP_AF23 >> 2 }, /* 010110 */ 175 { "af31", IPTOS_DSCP_AF31 >> 2 }, /* 011010 */ 176 { "af32", IPTOS_DSCP_AF32 >> 2 }, /* 011100 */ 177 { "af33", IPTOS_DSCP_AF33 >> 2 }, /* 011110 */ 178 { "af41", IPTOS_DSCP_AF41 >> 2 }, /* 100010 */ 179 { "af42", IPTOS_DSCP_AF42 >> 2 }, /* 100100 */ 180 { "af43", IPTOS_DSCP_AF43 >> 2 }, /* 100110 */ 181 { "be", IPTOS_DSCP_CS0 >> 2 }, /* 000000 */ 182 { "ef", IPTOS_DSCP_EF >> 2 }, /* 101110 */ 183 { "cs0", IPTOS_DSCP_CS0 >> 2 }, /* 000000 */ 184 { "cs1", IPTOS_DSCP_CS1 >> 2 }, /* 001000 */ 185 { "cs2", IPTOS_DSCP_CS2 >> 2 }, /* 010000 */ 186 { "cs3", IPTOS_DSCP_CS3 >> 2 }, /* 011000 */ 187 { "cs4", IPTOS_DSCP_CS4 >> 2 }, /* 100000 */ 188 { "cs5", IPTOS_DSCP_CS5 >> 2 }, /* 101000 */ 189 { "cs6", IPTOS_DSCP_CS6 >> 2 }, /* 110000 */ 190 { "cs7", IPTOS_DSCP_CS7 >> 2 }, /* 100000 */ 191 { NULL, 0 } 192 }; 193 194 static struct _s_x limit_masks[] = { 195 {"all", DYN_SRC_ADDR|DYN_SRC_PORT|DYN_DST_ADDR|DYN_DST_PORT}, 196 {"src-addr", DYN_SRC_ADDR}, 197 {"src-port", DYN_SRC_PORT}, 198 {"dst-addr", DYN_DST_ADDR}, 199 {"dst-port", DYN_DST_PORT}, 200 {NULL, 0} 201 }; 202 203 /* 204 * we use IPPROTO_ETHERTYPE as a fake protocol id to call the print routines 205 * This is only used in this code. 206 */ 207 #define IPPROTO_ETHERTYPE 0x1000 208 static struct _s_x ether_types[] = { 209 /* 210 * Note, we cannot use "-:&/" in the names because they are field 211 * separators in the type specifications. Also, we use s = NULL as 212 * end-delimiter, because a type of 0 can be legal. 213 */ 214 { "ip", 0x0800 }, 215 { "ipv4", 0x0800 }, 216 { "ipv6", 0x86dd }, 217 { "arp", 0x0806 }, 218 { "rarp", 0x8035 }, 219 { "vlan", 0x8100 }, 220 { "loop", 0x9000 }, 221 { "trail", 0x1000 }, 222 { "at", 0x809b }, 223 { "atalk", 0x809b }, 224 { "aarp", 0x80f3 }, 225 { "pppoe_disc", 0x8863 }, 226 { "pppoe_sess", 0x8864 }, 227 { "ipx_8022", 0x00E0 }, 228 { "ipx_8023", 0x0000 }, 229 { "ipx_ii", 0x8137 }, 230 { "ipx_snap", 0x8137 }, 231 { "ipx", 0x8137 }, 232 { "ns", 0x0600 }, 233 { NULL, 0 } 234 }; 235 236 237 static struct _s_x rule_actions[] = { 238 { "accept", TOK_ACCEPT }, 239 { "pass", TOK_ACCEPT }, 240 { "allow", TOK_ACCEPT }, 241 { "permit", TOK_ACCEPT }, 242 { "count", TOK_COUNT }, 243 { "pipe", TOK_PIPE }, 244 { "queue", TOK_QUEUE }, 245 { "divert", TOK_DIVERT }, 246 { "tee", TOK_TEE }, 247 { "netgraph", TOK_NETGRAPH }, 248 { "ngtee", TOK_NGTEE }, 249 { "fwd", TOK_FORWARD }, 250 { "forward", TOK_FORWARD }, 251 { "skipto", TOK_SKIPTO }, 252 { "deny", TOK_DENY }, 253 { "drop", TOK_DENY }, 254 { "reject", TOK_REJECT }, 255 { "reset6", TOK_RESET6 }, 256 { "reset", TOK_RESET }, 257 { "unreach6", TOK_UNREACH6 }, 258 { "unreach", TOK_UNREACH }, 259 { "check-state", TOK_CHECKSTATE }, 260 { "//", TOK_COMMENT }, 261 { "nat", TOK_NAT }, 262 { "reass", TOK_REASS }, 263 { "setfib", TOK_SETFIB }, 264 { "setdscp", TOK_SETDSCP }, 265 { "call", TOK_CALL }, 266 { "return", TOK_RETURN }, 267 { NULL, 0 } /* terminator */ 268 }; 269 270 static struct _s_x rule_action_params[] = { 271 { "altq", TOK_ALTQ }, 272 { "log", TOK_LOG }, 273 { "tag", TOK_TAG }, 274 { "untag", TOK_UNTAG }, 275 { NULL, 0 } /* terminator */ 276 }; 277 278 /* 279 * The 'lookup' instruction accepts one of the following arguments. 280 * -1 is a terminator for the list. 281 * Arguments are passed as v[1] in O_DST_LOOKUP options. 282 */ 283 static int lookup_key[] = { 284 TOK_DSTIP, TOK_SRCIP, TOK_DSTPORT, TOK_SRCPORT, 285 TOK_UID, TOK_JAIL, TOK_DSCP, -1 }; 286 287 static struct _s_x rule_options[] = { 288 { "tagged", TOK_TAGGED }, 289 { "uid", TOK_UID }, 290 { "gid", TOK_GID }, 291 { "jail", TOK_JAIL }, 292 { "in", TOK_IN }, 293 { "limit", TOK_LIMIT }, 294 { "keep-state", TOK_KEEPSTATE }, 295 { "bridged", TOK_LAYER2 }, 296 { "layer2", TOK_LAYER2 }, 297 { "out", TOK_OUT }, 298 { "diverted", TOK_DIVERTED }, 299 { "diverted-loopback", TOK_DIVERTEDLOOPBACK }, 300 { "diverted-output", TOK_DIVERTEDOUTPUT }, 301 { "xmit", TOK_XMIT }, 302 { "recv", TOK_RECV }, 303 { "via", TOK_VIA }, 304 { "fragment", TOK_FRAG }, 305 { "frag", TOK_FRAG }, 306 { "fib", TOK_FIB }, 307 { "ipoptions", TOK_IPOPTS }, 308 { "ipopts", TOK_IPOPTS }, 309 { "iplen", TOK_IPLEN }, 310 { "ipid", TOK_IPID }, 311 { "ipprecedence", TOK_IPPRECEDENCE }, 312 { "dscp", TOK_DSCP }, 313 { "iptos", TOK_IPTOS }, 314 { "ipttl", TOK_IPTTL }, 315 { "ipversion", TOK_IPVER }, 316 { "ipver", TOK_IPVER }, 317 { "estab", TOK_ESTAB }, 318 { "established", TOK_ESTAB }, 319 { "setup", TOK_SETUP }, 320 { "sockarg", TOK_SOCKARG }, 321 { "tcpdatalen", TOK_TCPDATALEN }, 322 { "tcpflags", TOK_TCPFLAGS }, 323 { "tcpflgs", TOK_TCPFLAGS }, 324 { "tcpoptions", TOK_TCPOPTS }, 325 { "tcpopts", TOK_TCPOPTS }, 326 { "tcpseq", TOK_TCPSEQ }, 327 { "tcpack", TOK_TCPACK }, 328 { "tcpwin", TOK_TCPWIN }, 329 { "icmptype", TOK_ICMPTYPES }, 330 { "icmptypes", TOK_ICMPTYPES }, 331 { "dst-ip", TOK_DSTIP }, 332 { "src-ip", TOK_SRCIP }, 333 { "dst-port", TOK_DSTPORT }, 334 { "src-port", TOK_SRCPORT }, 335 { "proto", TOK_PROTO }, 336 { "MAC", TOK_MAC }, 337 { "mac", TOK_MAC }, 338 { "mac-type", TOK_MACTYPE }, 339 { "verrevpath", TOK_VERREVPATH }, 340 { "versrcreach", TOK_VERSRCREACH }, 341 { "antispoof", TOK_ANTISPOOF }, 342 { "ipsec", TOK_IPSEC }, 343 { "icmp6type", TOK_ICMP6TYPES }, 344 { "icmp6types", TOK_ICMP6TYPES }, 345 { "ext6hdr", TOK_EXT6HDR}, 346 { "flow-id", TOK_FLOWID}, 347 { "ipv6", TOK_IPV6}, 348 { "ip6", TOK_IPV6}, 349 { "ipv4", TOK_IPV4}, 350 { "ip4", TOK_IPV4}, 351 { "dst-ipv6", TOK_DSTIP6}, 352 { "dst-ip6", TOK_DSTIP6}, 353 { "src-ipv6", TOK_SRCIP6}, 354 { "src-ip6", TOK_SRCIP6}, 355 { "lookup", TOK_LOOKUP}, 356 { "flow", TOK_FLOW}, 357 { "//", TOK_COMMENT }, 358 359 { "not", TOK_NOT }, /* pseudo option */ 360 { "!", /* escape ? */ TOK_NOT }, /* pseudo option */ 361 { "or", TOK_OR }, /* pseudo option */ 362 { "|", /* escape */ TOK_OR }, /* pseudo option */ 363 { "{", TOK_STARTBRACE }, /* pseudo option */ 364 { "(", TOK_STARTBRACE }, /* pseudo option */ 365 { "}", TOK_ENDBRACE }, /* pseudo option */ 366 { ")", TOK_ENDBRACE }, /* pseudo option */ 367 { NULL, 0 } /* terminator */ 368 }; 369 370 void bprint_uint_arg(struct buf_pr *bp, const char *str, uint32_t arg); 371 static int ipfw_get_config(struct cmdline_opts *co, struct format_opts *fo, 372 ipfw_cfg_lheader **pcfg, size_t *psize); 373 static int ipfw_show_config(struct cmdline_opts *co, struct format_opts *fo, 374 ipfw_cfg_lheader *cfg, size_t sz, int ac, char **av); 375 static void ipfw_list_tifaces(void); 376 377 /* 378 * Simple string buffer API. 379 * Used to simplify buffer passing between function and for 380 * transparent overrun handling. 381 */ 382 383 /* 384 * Allocates new buffer of given size @sz. 385 * 386 * Returns 0 on success. 387 */ 388 int 389 bp_alloc(struct buf_pr *b, size_t size) 390 { 391 memset(b, 0, sizeof(struct buf_pr)); 392 393 if ((b->buf = calloc(1, size)) == NULL) 394 return (ENOMEM); 395 396 b->ptr = b->buf; 397 b->size = size; 398 b->avail = b->size; 399 400 return (0); 401 } 402 403 void 404 bp_free(struct buf_pr *b) 405 { 406 407 free(b->buf); 408 } 409 410 /* 411 * Flushes buffer so new writer start from beginning. 412 */ 413 void 414 bp_flush(struct buf_pr *b) 415 { 416 417 b->ptr = b->buf; 418 b->avail = b->size; 419 } 420 421 /* 422 * Print message specified by @format and args. 423 * Automatically manage buffer space and transparently handle 424 * buffer overruns. 425 * 426 * Returns number of bytes that should have been printed. 427 */ 428 int 429 bprintf(struct buf_pr *b, char *format, ...) 430 { 431 va_list args; 432 int i; 433 434 va_start(args, format); 435 436 i = vsnprintf(b->ptr, b->avail, format, args); 437 va_end(args); 438 439 if (i > b->avail || i < 0) { 440 /* Overflow or print error */ 441 b->avail = 0; 442 } else { 443 b->ptr += i; 444 b->avail -= i; 445 } 446 447 b->needed += i; 448 449 return (i); 450 } 451 452 /* 453 * Special values printer for tablearg-aware opcodes. 454 */ 455 void 456 bprint_uint_arg(struct buf_pr *bp, const char *str, uint32_t arg) 457 { 458 459 if (str != NULL) 460 bprintf(bp, "%s", str); 461 if (arg == IP_FW_TARG) 462 bprintf(bp, "tablearg"); 463 else 464 bprintf(bp, "%u", arg); 465 } 466 467 /* 468 * Helper routine to print a possibly unaligned uint64_t on 469 * various platform. If width > 0, print the value with 470 * the desired width, followed by a space; 471 * otherwise, return the required width. 472 */ 473 int 474 pr_u64(struct buf_pr *b, uint64_t *pd, int width) 475 { 476 #ifdef TCC 477 #define U64_FMT "I64" 478 #else 479 #define U64_FMT "llu" 480 #endif 481 uint64_t u; 482 unsigned long long d; 483 484 bcopy (pd, &u, sizeof(u)); 485 d = u; 486 return (width > 0) ? 487 bprintf(b, "%*" U64_FMT " ", width, d) : 488 snprintf(NULL, 0, "%" U64_FMT, d) ; 489 #undef U64_FMT 490 } 491 492 493 void * 494 safe_calloc(size_t number, size_t size) 495 { 496 void *ret = calloc(number, size); 497 498 if (ret == NULL) 499 err(EX_OSERR, "calloc"); 500 return ret; 501 } 502 503 void * 504 safe_realloc(void *ptr, size_t size) 505 { 506 void *ret = realloc(ptr, size); 507 508 if (ret == NULL) 509 err(EX_OSERR, "realloc"); 510 return ret; 511 } 512 513 /* 514 * Compare things like interface or table names. 515 */ 516 int 517 stringnum_cmp(const char *a, const char *b) 518 { 519 int la, lb; 520 521 la = strlen(a); 522 lb = strlen(b); 523 524 if (la > lb) 525 return (1); 526 else if (la < lb) 527 return (-01); 528 529 return (strcmp(a, b)); 530 } 531 532 533 /* 534 * conditionally runs the command. 535 * Selected options or negative -> getsockopt 536 */ 537 int 538 do_cmd(int optname, void *optval, uintptr_t optlen) 539 { 540 int i; 541 542 if (co.test_only) 543 return 0; 544 545 if (ipfw_socket == -1) 546 ipfw_socket = socket(AF_INET, SOCK_RAW, IPPROTO_RAW); 547 if (ipfw_socket < 0) 548 err(EX_UNAVAILABLE, "socket"); 549 550 if (optname == IP_FW_GET || optname == IP_DUMMYNET_GET || 551 optname == IP_FW_ADD || optname == IP_FW3 || 552 optname == IP_FW_NAT_GET_CONFIG || 553 optname < 0 || 554 optname == IP_FW_NAT_GET_LOG) { 555 if (optname < 0) 556 optname = -optname; 557 i = getsockopt(ipfw_socket, IPPROTO_IP, optname, optval, 558 (socklen_t *)optlen); 559 } else { 560 i = setsockopt(ipfw_socket, IPPROTO_IP, optname, optval, optlen); 561 } 562 return i; 563 } 564 565 /* 566 * do_set3 - pass ipfw control cmd to kernel 567 * @optname: option name 568 * @optval: pointer to option data 569 * @optlen: option length 570 * 571 * Assumes op3 header is already embedded. 572 * Calls setsockopt() with IP_FW3 as kernel-visible opcode. 573 * Returns 0 on success or errno otherwise. 574 */ 575 int 576 do_set3(int optname, ip_fw3_opheader *op3, uintptr_t optlen) 577 { 578 579 if (co.test_only) 580 return (0); 581 582 if (ipfw_socket == -1) 583 ipfw_socket = socket(AF_INET, SOCK_RAW, IPPROTO_RAW); 584 if (ipfw_socket < 0) 585 err(EX_UNAVAILABLE, "socket"); 586 587 op3->opcode = optname; 588 589 return (setsockopt(ipfw_socket, IPPROTO_IP, IP_FW3, op3, optlen)); 590 } 591 592 /* 593 * do_get3 - pass ipfw control cmd to kernel 594 * @optname: option name 595 * @optval: pointer to option data 596 * @optlen: pointer to option length 597 * 598 * Assumes op3 header is already embedded. 599 * Calls getsockopt() with IP_FW3 as kernel-visible opcode. 600 * Returns 0 on success or errno otherwise. 601 */ 602 int 603 do_get3(int optname, ip_fw3_opheader *op3, size_t *optlen) 604 { 605 int error; 606 607 if (co.test_only) 608 return (0); 609 610 if (ipfw_socket == -1) 611 ipfw_socket = socket(AF_INET, SOCK_RAW, IPPROTO_RAW); 612 if (ipfw_socket < 0) 613 err(EX_UNAVAILABLE, "socket"); 614 615 op3->opcode = optname; 616 617 error = getsockopt(ipfw_socket, IPPROTO_IP, IP_FW3, op3, 618 (socklen_t *)optlen); 619 620 return (error); 621 } 622 623 /** 624 * match_token takes a table and a string, returns the value associated 625 * with the string (-1 in case of failure). 626 */ 627 int 628 match_token(struct _s_x *table, char *string) 629 { 630 struct _s_x *pt; 631 uint i = strlen(string); 632 633 for (pt = table ; i && pt->s != NULL ; pt++) 634 if (strlen(pt->s) == i && !bcmp(string, pt->s, i)) 635 return pt->x; 636 return (-1); 637 } 638 639 /** 640 * match_token takes a table and a string, returns the value associated 641 * with the string for the best match. 642 * 643 * Returns: 644 * value from @table for matched records 645 * -1 for non-matched records 646 * -2 if more than one records match @string. 647 */ 648 int 649 match_token_relaxed(struct _s_x *table, char *string) 650 { 651 struct _s_x *pt, *m; 652 int i, c; 653 654 i = strlen(string); 655 c = 0; 656 657 for (pt = table ; i != 0 && pt->s != NULL ; pt++) { 658 if (strncmp(pt->s, string, i) != 0) 659 continue; 660 m = pt; 661 c++; 662 } 663 664 if (c == 1) 665 return (m->x); 666 667 return (c > 0 ? -2: -1); 668 } 669 670 /** 671 * match_value takes a table and a value, returns the string associated 672 * with the value (NULL in case of failure). 673 */ 674 char const * 675 match_value(struct _s_x *p, int value) 676 { 677 for (; p->s != NULL; p++) 678 if (p->x == value) 679 return p->s; 680 return NULL; 681 } 682 683 size_t 684 concat_tokens(char *buf, size_t bufsize, struct _s_x *table, char *delimiter) 685 { 686 struct _s_x *pt; 687 int l; 688 size_t sz; 689 690 for (sz = 0, pt = table ; pt->s != NULL; pt++) { 691 l = snprintf(buf + sz, bufsize - sz, "%s%s", 692 (sz == 0) ? "" : delimiter, pt->s); 693 sz += l; 694 bufsize += l; 695 if (sz > bufsize) 696 return (bufsize); 697 } 698 699 return (sz); 700 } 701 702 /* 703 * helper function to process a set of flags and set bits in the 704 * appropriate masks. 705 */ 706 int 707 fill_flags(struct _s_x *flags, char *p, char **e, uint32_t *set, 708 uint32_t *clear) 709 { 710 char *q; /* points to the separator */ 711 int val; 712 uint32_t *which; /* mask we are working on */ 713 714 while (p && *p) { 715 if (*p == '!') { 716 p++; 717 which = clear; 718 } else 719 which = set; 720 q = strchr(p, ','); 721 if (q) 722 *q++ = '\0'; 723 val = match_token(flags, p); 724 if (val <= 0) { 725 if (e != NULL) 726 *e = p; 727 return (-1); 728 } 729 *which |= (uint32_t)val; 730 p = q; 731 } 732 return (0); 733 } 734 735 void 736 print_flags_buffer(char *buf, size_t sz, struct _s_x *list, uint32_t set) 737 { 738 char const *comma = ""; 739 int i, l; 740 741 for (i = 0; list[i].x != 0; i++) { 742 if ((set & list[i].x) == 0) 743 continue; 744 745 set &= ~list[i].x; 746 l = snprintf(buf, sz, "%s%s", comma, list[i].s); 747 if (l >= sz) 748 return; 749 comma = ","; 750 buf += l; 751 sz -=l; 752 } 753 } 754 755 /* 756 * _substrcmp takes two strings and returns 1 if they do not match, 757 * and 0 if they match exactly or the first string is a sub-string 758 * of the second. A warning is printed to stderr in the case that the 759 * first string is a sub-string of the second. 760 * 761 * This function will be removed in the future through the usual 762 * deprecation process. 763 */ 764 int 765 _substrcmp(const char *str1, const char* str2) 766 { 767 768 if (strncmp(str1, str2, strlen(str1)) != 0) 769 return 1; 770 771 if (strlen(str1) != strlen(str2)) 772 warnx("DEPRECATED: '%s' matched '%s' as a sub-string", 773 str1, str2); 774 return 0; 775 } 776 777 /* 778 * _substrcmp2 takes three strings and returns 1 if the first two do not match, 779 * and 0 if they match exactly or the second string is a sub-string 780 * of the first. A warning is printed to stderr in the case that the 781 * first string does not match the third. 782 * 783 * This function exists to warn about the bizarre construction 784 * strncmp(str, "by", 2) which is used to allow people to use a shortcut 785 * for "bytes". The problem is that in addition to accepting "by", 786 * "byt", "byte", and "bytes", it also excepts "by_rabid_dogs" and any 787 * other string beginning with "by". 788 * 789 * This function will be removed in the future through the usual 790 * deprecation process. 791 */ 792 int 793 _substrcmp2(const char *str1, const char* str2, const char* str3) 794 { 795 796 if (strncmp(str1, str2, strlen(str2)) != 0) 797 return 1; 798 799 if (strcmp(str1, str3) != 0) 800 warnx("DEPRECATED: '%s' matched '%s'", 801 str1, str3); 802 return 0; 803 } 804 805 /* 806 * prints one port, symbolic or numeric 807 */ 808 static void 809 print_port(struct buf_pr *bp, int proto, uint16_t port) 810 { 811 812 if (proto == IPPROTO_ETHERTYPE) { 813 char const *s; 814 815 if (co.do_resolv && (s = match_value(ether_types, port)) ) 816 bprintf(bp, "%s", s); 817 else 818 bprintf(bp, "0x%04x", port); 819 } else { 820 struct servent *se = NULL; 821 if (co.do_resolv) { 822 struct protoent *pe = getprotobynumber(proto); 823 824 se = getservbyport(htons(port), pe ? pe->p_name : NULL); 825 } 826 if (se) 827 bprintf(bp, "%s", se->s_name); 828 else 829 bprintf(bp, "%d", port); 830 } 831 } 832 833 static struct _s_x _port_name[] = { 834 {"dst-port", O_IP_DSTPORT}, 835 {"src-port", O_IP_SRCPORT}, 836 {"ipid", O_IPID}, 837 {"iplen", O_IPLEN}, 838 {"ipttl", O_IPTTL}, 839 {"mac-type", O_MAC_TYPE}, 840 {"tcpdatalen", O_TCPDATALEN}, 841 {"tcpwin", O_TCPWIN}, 842 {"tagged", O_TAGGED}, 843 {NULL, 0} 844 }; 845 846 /* 847 * Print the values in a list 16-bit items of the types above. 848 * XXX todo: add support for mask. 849 */ 850 static void 851 print_newports(struct buf_pr *bp, ipfw_insn_u16 *cmd, int proto, int opcode) 852 { 853 uint16_t *p = cmd->ports; 854 int i; 855 char const *sep; 856 857 if (opcode != 0) { 858 sep = match_value(_port_name, opcode); 859 if (sep == NULL) 860 sep = "???"; 861 bprintf(bp, " %s", sep); 862 } 863 sep = " "; 864 for (i = F_LEN((ipfw_insn *)cmd) - 1; i > 0; i--, p += 2) { 865 bprintf(bp, "%s", sep); 866 print_port(bp, proto, p[0]); 867 if (p[0] != p[1]) { 868 bprintf(bp, "-"); 869 print_port(bp, proto, p[1]); 870 } 871 sep = ","; 872 } 873 } 874 875 /* 876 * Like strtol, but also translates service names into port numbers 877 * for some protocols. 878 * In particular: 879 * proto == -1 disables the protocol check; 880 * proto == IPPROTO_ETHERTYPE looks up an internal table 881 * proto == <some value in /etc/protocols> matches the values there. 882 * Returns *end == s in case the parameter is not found. 883 */ 884 static int 885 strtoport(char *s, char **end, int base, int proto) 886 { 887 char *p, *buf; 888 char *s1; 889 int i; 890 891 *end = s; /* default - not found */ 892 if (*s == '\0') 893 return 0; /* not found */ 894 895 if (isdigit(*s)) 896 return strtol(s, end, base); 897 898 /* 899 * find separator. '\\' escapes the next char. 900 */ 901 for (s1 = s; *s1 && (isalnum(*s1) || *s1 == '\\') ; s1++) 902 if (*s1 == '\\' && s1[1] != '\0') 903 s1++; 904 905 buf = safe_calloc(s1 - s + 1, 1); 906 907 /* 908 * copy into a buffer skipping backslashes 909 */ 910 for (p = s, i = 0; p != s1 ; p++) 911 if (*p != '\\') 912 buf[i++] = *p; 913 buf[i++] = '\0'; 914 915 if (proto == IPPROTO_ETHERTYPE) { 916 i = match_token(ether_types, buf); 917 free(buf); 918 if (i != -1) { /* found */ 919 *end = s1; 920 return i; 921 } 922 } else { 923 struct protoent *pe = NULL; 924 struct servent *se; 925 926 if (proto != 0) 927 pe = getprotobynumber(proto); 928 setservent(1); 929 se = getservbyname(buf, pe ? pe->p_name : NULL); 930 free(buf); 931 if (se != NULL) { 932 *end = s1; 933 return ntohs(se->s_port); 934 } 935 } 936 return 0; /* not found */ 937 } 938 939 /* 940 * Fill the body of the command with the list of port ranges. 941 */ 942 static int 943 fill_newports(ipfw_insn_u16 *cmd, char *av, int proto, int cblen) 944 { 945 uint16_t a, b, *p = cmd->ports; 946 int i = 0; 947 char *s = av; 948 949 while (*s) { 950 a = strtoport(av, &s, 0, proto); 951 if (s == av) /* empty or invalid argument */ 952 return (0); 953 954 CHECK_LENGTH(cblen, i + 2); 955 956 switch (*s) { 957 case '-': /* a range */ 958 av = s + 1; 959 b = strtoport(av, &s, 0, proto); 960 /* Reject expressions like '1-abc' or '1-2-3'. */ 961 if (s == av || (*s != ',' && *s != '\0')) 962 return (0); 963 p[0] = a; 964 p[1] = b; 965 break; 966 case ',': /* comma separated list */ 967 case '\0': 968 p[0] = p[1] = a; 969 break; 970 default: 971 warnx("port list: invalid separator <%c> in <%s>", 972 *s, av); 973 return (0); 974 } 975 976 i++; 977 p += 2; 978 av = s + 1; 979 } 980 if (i > 0) { 981 if (i + 1 > F_LEN_MASK) 982 errx(EX_DATAERR, "too many ports/ranges\n"); 983 cmd->o.len |= i + 1; /* leave F_NOT and F_OR untouched */ 984 } 985 return (i); 986 } 987 988 /* 989 * Fill the body of the command with the list of DiffServ codepoints. 990 */ 991 static void 992 fill_dscp(ipfw_insn *cmd, char *av, int cblen) 993 { 994 uint32_t *low, *high; 995 char *s = av, *a; 996 int code; 997 998 cmd->opcode = O_DSCP; 999 cmd->len |= F_INSN_SIZE(ipfw_insn_u32) + 1; 1000 1001 CHECK_CMDLEN; 1002 1003 low = (uint32_t *)(cmd + 1); 1004 high = low + 1; 1005 1006 *low = 0; 1007 *high = 0; 1008 1009 while (s != NULL) { 1010 a = strchr(s, ','); 1011 1012 if (a != NULL) 1013 *a++ = '\0'; 1014 1015 if (isalpha(*s)) { 1016 if ((code = match_token(f_ipdscp, s)) == -1) 1017 errx(EX_DATAERR, "Unknown DSCP code"); 1018 } else { 1019 code = strtoul(s, NULL, 10); 1020 if (code < 0 || code > 63) 1021 errx(EX_DATAERR, "Invalid DSCP value"); 1022 } 1023 1024 if (code > 32) 1025 *high |= 1 << (code - 32); 1026 else 1027 *low |= 1 << code; 1028 1029 s = a; 1030 } 1031 } 1032 1033 static struct _s_x icmpcodes[] = { 1034 { "net", ICMP_UNREACH_NET }, 1035 { "host", ICMP_UNREACH_HOST }, 1036 { "protocol", ICMP_UNREACH_PROTOCOL }, 1037 { "port", ICMP_UNREACH_PORT }, 1038 { "needfrag", ICMP_UNREACH_NEEDFRAG }, 1039 { "srcfail", ICMP_UNREACH_SRCFAIL }, 1040 { "net-unknown", ICMP_UNREACH_NET_UNKNOWN }, 1041 { "host-unknown", ICMP_UNREACH_HOST_UNKNOWN }, 1042 { "isolated", ICMP_UNREACH_ISOLATED }, 1043 { "net-prohib", ICMP_UNREACH_NET_PROHIB }, 1044 { "host-prohib", ICMP_UNREACH_HOST_PROHIB }, 1045 { "tosnet", ICMP_UNREACH_TOSNET }, 1046 { "toshost", ICMP_UNREACH_TOSHOST }, 1047 { "filter-prohib", ICMP_UNREACH_FILTER_PROHIB }, 1048 { "host-precedence", ICMP_UNREACH_HOST_PRECEDENCE }, 1049 { "precedence-cutoff", ICMP_UNREACH_PRECEDENCE_CUTOFF }, 1050 { NULL, 0 } 1051 }; 1052 1053 static void 1054 fill_reject_code(u_short *codep, char *str) 1055 { 1056 int val; 1057 char *s; 1058 1059 val = strtoul(str, &s, 0); 1060 if (s == str || *s != '\0' || val >= 0x100) 1061 val = match_token(icmpcodes, str); 1062 if (val < 0) 1063 errx(EX_DATAERR, "unknown ICMP unreachable code ``%s''", str); 1064 *codep = val; 1065 return; 1066 } 1067 1068 static void 1069 print_reject_code(struct buf_pr *bp, uint16_t code) 1070 { 1071 char const *s; 1072 1073 if ((s = match_value(icmpcodes, code)) != NULL) 1074 bprintf(bp, "unreach %s", s); 1075 else 1076 bprintf(bp, "unreach %u", code); 1077 } 1078 1079 /* 1080 * Returns the number of bits set (from left) in a contiguous bitmask, 1081 * or -1 if the mask is not contiguous. 1082 * XXX this needs a proper fix. 1083 * This effectively works on masks in big-endian (network) format. 1084 * when compiled on little endian architectures. 1085 * 1086 * First bit is bit 7 of the first byte -- note, for MAC addresses, 1087 * the first bit on the wire is bit 0 of the first byte. 1088 * len is the max length in bits. 1089 */ 1090 int 1091 contigmask(uint8_t *p, int len) 1092 { 1093 int i, n; 1094 1095 for (i=0; i<len ; i++) 1096 if ( (p[i/8] & (1 << (7 - (i%8)))) == 0) /* first bit unset */ 1097 break; 1098 for (n=i+1; n < len; n++) 1099 if ( (p[n/8] & (1 << (7 - (n%8)))) != 0) 1100 return -1; /* mask not contiguous */ 1101 return i; 1102 } 1103 1104 /* 1105 * print flags set/clear in the two bitmasks passed as parameters. 1106 * There is a specialized check for f_tcpflags. 1107 */ 1108 static void 1109 print_flags(struct buf_pr *bp, char const *name, ipfw_insn *cmd, 1110 struct _s_x *list) 1111 { 1112 char const *comma = ""; 1113 int i; 1114 uint8_t set = cmd->arg1 & 0xff; 1115 uint8_t clear = (cmd->arg1 >> 8) & 0xff; 1116 1117 if (list == f_tcpflags && set == TH_SYN && clear == TH_ACK) { 1118 bprintf(bp, " setup"); 1119 return; 1120 } 1121 1122 bprintf(bp, " %s ", name); 1123 for (i=0; list[i].x != 0; i++) { 1124 if (set & list[i].x) { 1125 set &= ~list[i].x; 1126 bprintf(bp, "%s%s", comma, list[i].s); 1127 comma = ","; 1128 } 1129 if (clear & list[i].x) { 1130 clear &= ~list[i].x; 1131 bprintf(bp, "%s!%s", comma, list[i].s); 1132 comma = ","; 1133 } 1134 } 1135 } 1136 1137 1138 /* 1139 * Print the ip address contained in a command. 1140 */ 1141 static void 1142 print_ip(struct buf_pr *bp, struct format_opts *fo, ipfw_insn_ip *cmd, 1143 char const *s) 1144 { 1145 struct hostent *he = NULL; 1146 struct in_addr *ia; 1147 uint32_t len = F_LEN((ipfw_insn *)cmd); 1148 uint32_t *a = ((ipfw_insn_u32 *)cmd)->d; 1149 char *t; 1150 1151 if (cmd->o.opcode == O_IP_DST_LOOKUP && len > F_INSN_SIZE(ipfw_insn_u32)) { 1152 uint32_t d = a[1]; 1153 const char *arg = "<invalid>"; 1154 1155 if (d < sizeof(lookup_key)/sizeof(lookup_key[0])) 1156 arg = match_value(rule_options, lookup_key[d]); 1157 t = table_search_ctlv(fo->tstate, ((ipfw_insn *)cmd)->arg1); 1158 bprintf(bp, "%s lookup %s %s", cmd->o.len & F_NOT ? " not": "", 1159 arg, t); 1160 return; 1161 } 1162 bprintf(bp, "%s%s ", cmd->o.len & F_NOT ? " not": "", s); 1163 1164 if (cmd->o.opcode == O_IP_SRC_ME || cmd->o.opcode == O_IP_DST_ME) { 1165 bprintf(bp, "me"); 1166 return; 1167 } 1168 if (cmd->o.opcode == O_IP_SRC_LOOKUP || 1169 cmd->o.opcode == O_IP_DST_LOOKUP) { 1170 t = table_search_ctlv(fo->tstate, ((ipfw_insn *)cmd)->arg1); 1171 bprintf(bp, "table(%s", t); 1172 if (len == F_INSN_SIZE(ipfw_insn_u32)) 1173 bprintf(bp, ",%u", *a); 1174 bprintf(bp, ")"); 1175 return; 1176 } 1177 if (cmd->o.opcode == O_IP_SRC_SET || cmd->o.opcode == O_IP_DST_SET) { 1178 uint32_t x, *map = (uint32_t *)&(cmd->mask); 1179 int i, j; 1180 char comma = '{'; 1181 1182 x = cmd->o.arg1 - 1; 1183 x = htonl( ~x ); 1184 cmd->addr.s_addr = htonl(cmd->addr.s_addr); 1185 bprintf(bp, "%s/%d", inet_ntoa(cmd->addr), 1186 contigmask((uint8_t *)&x, 32)); 1187 x = cmd->addr.s_addr = htonl(cmd->addr.s_addr); 1188 x &= 0xff; /* base */ 1189 /* 1190 * Print bits and ranges. 1191 * Locate first bit set (i), then locate first bit unset (j). 1192 * If we have 3+ consecutive bits set, then print them as a 1193 * range, otherwise only print the initial bit and rescan. 1194 */ 1195 for (i=0; i < cmd->o.arg1; i++) 1196 if (map[i/32] & (1<<(i & 31))) { 1197 for (j=i+1; j < cmd->o.arg1; j++) 1198 if (!(map[ j/32] & (1<<(j & 31)))) 1199 break; 1200 bprintf(bp, "%c%d", comma, i+x); 1201 if (j>i+2) { /* range has at least 3 elements */ 1202 bprintf(bp, "-%d", j-1+x); 1203 i = j-1; 1204 } 1205 comma = ','; 1206 } 1207 bprintf(bp, "}"); 1208 return; 1209 } 1210 /* 1211 * len == 2 indicates a single IP, whereas lists of 1 or more 1212 * addr/mask pairs have len = (2n+1). We convert len to n so we 1213 * use that to count the number of entries. 1214 */ 1215 for (len = len / 2; len > 0; len--, a += 2) { 1216 int mb = /* mask length */ 1217 (cmd->o.opcode == O_IP_SRC || cmd->o.opcode == O_IP_DST) ? 1218 32 : contigmask((uint8_t *)&(a[1]), 32); 1219 if (mb == 32 && co.do_resolv) 1220 he = gethostbyaddr((char *)&(a[0]), sizeof(u_long), AF_INET); 1221 if (he != NULL) /* resolved to name */ 1222 bprintf(bp, "%s", he->h_name); 1223 else if (mb == 0) /* any */ 1224 bprintf(bp, "any"); 1225 else { /* numeric IP followed by some kind of mask */ 1226 ia = (struct in_addr *)&a[0]; 1227 bprintf(bp, "%s", inet_ntoa(*ia)); 1228 if (mb < 0) { 1229 ia = (struct in_addr *)&a[1]; 1230 bprintf(bp, ":%s", inet_ntoa(*ia)); 1231 } else if (mb < 32) 1232 bprintf(bp, "/%d", mb); 1233 } 1234 if (len > 1) 1235 bprintf(bp, ","); 1236 } 1237 } 1238 1239 /* 1240 * prints a MAC address/mask pair 1241 */ 1242 static void 1243 print_mac(struct buf_pr *bp, uint8_t *addr, uint8_t *mask) 1244 { 1245 int l = contigmask(mask, 48); 1246 1247 if (l == 0) 1248 bprintf(bp, " any"); 1249 else { 1250 bprintf(bp, " %02x:%02x:%02x:%02x:%02x:%02x", 1251 addr[0], addr[1], addr[2], addr[3], addr[4], addr[5]); 1252 if (l == -1) 1253 bprintf(bp, "&%02x:%02x:%02x:%02x:%02x:%02x", 1254 mask[0], mask[1], mask[2], 1255 mask[3], mask[4], mask[5]); 1256 else if (l < 48) 1257 bprintf(bp, "/%d", l); 1258 } 1259 } 1260 1261 static void 1262 fill_icmptypes(ipfw_insn_u32 *cmd, char *av) 1263 { 1264 uint8_t type; 1265 1266 cmd->d[0] = 0; 1267 while (*av) { 1268 if (*av == ',') 1269 av++; 1270 1271 type = strtoul(av, &av, 0); 1272 1273 if (*av != ',' && *av != '\0') 1274 errx(EX_DATAERR, "invalid ICMP type"); 1275 1276 if (type > 31) 1277 errx(EX_DATAERR, "ICMP type out of range"); 1278 1279 cmd->d[0] |= 1 << type; 1280 } 1281 cmd->o.opcode = O_ICMPTYPE; 1282 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32); 1283 } 1284 1285 static void 1286 print_icmptypes(struct buf_pr *bp, ipfw_insn_u32 *cmd) 1287 { 1288 int i; 1289 char sep= ' '; 1290 1291 bprintf(bp, " icmptypes"); 1292 for (i = 0; i < 32; i++) { 1293 if ( (cmd->d[0] & (1 << (i))) == 0) 1294 continue; 1295 bprintf(bp, "%c%d", sep, i); 1296 sep = ','; 1297 } 1298 } 1299 1300 static void 1301 print_dscp(struct buf_pr *bp, ipfw_insn_u32 *cmd) 1302 { 1303 int i, c; 1304 uint32_t *v; 1305 char sep= ' '; 1306 const char *code; 1307 1308 bprintf(bp, " dscp"); 1309 i = 0; 1310 c = 0; 1311 v = cmd->d; 1312 while (i < 64) { 1313 if (*v & (1 << i)) { 1314 if ((code = match_value(f_ipdscp, i)) != NULL) 1315 bprintf(bp, "%c%s", sep, code); 1316 else 1317 bprintf(bp, "%c%d", sep, i); 1318 sep = ','; 1319 } 1320 1321 if ((++i % 32) == 0) 1322 v++; 1323 } 1324 } 1325 1326 /* 1327 * show_ipfw() prints the body of an ipfw rule. 1328 * Because the standard rule has at least proto src_ip dst_ip, we use 1329 * a helper function to produce these entries if not provided explicitly. 1330 * The first argument is the list of fields we have, the second is 1331 * the list of fields we want to be printed. 1332 * 1333 * Special cases if we have provided a MAC header: 1334 * + if the rule does not contain IP addresses/ports, do not print them; 1335 * + if the rule does not contain an IP proto, print "all" instead of "ip"; 1336 * 1337 * Once we have 'have_options', IP header fields are printed as options. 1338 */ 1339 #define HAVE_PROTO 0x0001 1340 #define HAVE_SRCIP 0x0002 1341 #define HAVE_DSTIP 0x0004 1342 #define HAVE_PROTO4 0x0008 1343 #define HAVE_PROTO6 0x0010 1344 #define HAVE_IP 0x0100 1345 #define HAVE_OPTIONS 0x8000 1346 1347 static void 1348 show_prerequisites(struct buf_pr *bp, int *flags, int want, int cmd) 1349 { 1350 (void)cmd; /* UNUSED */ 1351 if (co.comment_only) 1352 return; 1353 if ( (*flags & HAVE_IP) == HAVE_IP) 1354 *flags |= HAVE_OPTIONS; 1355 1356 if ( !(*flags & HAVE_OPTIONS)) { 1357 if ( !(*flags & HAVE_PROTO) && (want & HAVE_PROTO)) { 1358 if ( (*flags & HAVE_PROTO4)) 1359 bprintf(bp, " ip4"); 1360 else if ( (*flags & HAVE_PROTO6)) 1361 bprintf(bp, " ip6"); 1362 else 1363 bprintf(bp, " ip"); 1364 } 1365 if ( !(*flags & HAVE_SRCIP) && (want & HAVE_SRCIP)) 1366 bprintf(bp, " from any"); 1367 if ( !(*flags & HAVE_DSTIP) && (want & HAVE_DSTIP)) 1368 bprintf(bp, " to any"); 1369 } 1370 *flags |= want; 1371 } 1372 1373 static void 1374 show_static_rule(struct cmdline_opts *co, struct format_opts *fo, 1375 struct buf_pr *bp, struct ip_fw_rule *rule, struct ip_fw_bcounter *cntr) 1376 { 1377 static int twidth = 0; 1378 int l; 1379 ipfw_insn *cmd, *tagptr = NULL; 1380 const char *comment = NULL; /* ptr to comment if we have one */ 1381 int proto = 0; /* default */ 1382 int flags = 0; /* prerequisites */ 1383 ipfw_insn_log *logptr = NULL; /* set if we find an O_LOG */ 1384 ipfw_insn_altq *altqptr = NULL; /* set if we find an O_ALTQ */ 1385 int or_block = 0; /* we are in an or block */ 1386 uint32_t uval; 1387 1388 if ((fo->set_mask & (1 << rule->set)) == 0) { 1389 /* disabled mask */ 1390 if (!co->show_sets) 1391 return; 1392 else 1393 bprintf(bp, "# DISABLED "); 1394 } 1395 bprintf(bp, "%05u ", rule->rulenum); 1396 1397 /* Print counters if enabled */ 1398 if (fo->pcwidth > 0 || fo->bcwidth > 0) { 1399 pr_u64(bp, &cntr->pcnt, fo->pcwidth); 1400 pr_u64(bp, &cntr->bcnt, fo->bcwidth); 1401 } 1402 1403 if (co->do_time == 2) 1404 bprintf(bp, "%10u ", cntr->timestamp); 1405 else if (co->do_time == 1) { 1406 char timestr[30]; 1407 time_t t = (time_t)0; 1408 1409 if (twidth == 0) { 1410 strcpy(timestr, ctime(&t)); 1411 *strchr(timestr, '\n') = '\0'; 1412 twidth = strlen(timestr); 1413 } 1414 if (cntr->timestamp > 0) { 1415 t = _long_to_time(cntr->timestamp); 1416 1417 strcpy(timestr, ctime(&t)); 1418 *strchr(timestr, '\n') = '\0'; 1419 bprintf(bp, "%s ", timestr); 1420 } else { 1421 bprintf(bp, "%*s", twidth, " "); 1422 } 1423 } 1424 1425 if (co->show_sets) 1426 bprintf(bp, "set %d ", rule->set); 1427 1428 /* 1429 * print the optional "match probability" 1430 */ 1431 if (rule->cmd_len > 0) { 1432 cmd = rule->cmd ; 1433 if (cmd->opcode == O_PROB) { 1434 ipfw_insn_u32 *p = (ipfw_insn_u32 *)cmd; 1435 double d = 1.0 * p->d[0]; 1436 1437 d = (d / 0x7fffffff); 1438 bprintf(bp, "prob %f ", d); 1439 } 1440 } 1441 1442 /* 1443 * first print actions 1444 */ 1445 for (l = rule->cmd_len - rule->act_ofs, cmd = ACTION_PTR(rule); 1446 l > 0 ; l -= F_LEN(cmd), cmd += F_LEN(cmd)) { 1447 switch(cmd->opcode) { 1448 case O_CHECK_STATE: 1449 bprintf(bp, "check-state"); 1450 /* avoid printing anything else */ 1451 flags = HAVE_PROTO | HAVE_SRCIP | 1452 HAVE_DSTIP | HAVE_IP; 1453 break; 1454 1455 case O_ACCEPT: 1456 bprintf(bp, "allow"); 1457 break; 1458 1459 case O_COUNT: 1460 bprintf(bp, "count"); 1461 break; 1462 1463 case O_DENY: 1464 bprintf(bp, "deny"); 1465 break; 1466 1467 case O_REJECT: 1468 if (cmd->arg1 == ICMP_REJECT_RST) 1469 bprintf(bp, "reset"); 1470 else if (cmd->arg1 == ICMP_UNREACH_HOST) 1471 bprintf(bp, "reject"); 1472 else 1473 print_reject_code(bp, cmd->arg1); 1474 break; 1475 1476 case O_UNREACH6: 1477 if (cmd->arg1 == ICMP6_UNREACH_RST) 1478 bprintf(bp, "reset6"); 1479 else 1480 print_unreach6_code(cmd->arg1); 1481 break; 1482 1483 case O_SKIPTO: 1484 bprint_uint_arg(bp, "skipto ", cmd->arg1); 1485 break; 1486 1487 case O_PIPE: 1488 bprint_uint_arg(bp, "pipe ", cmd->arg1); 1489 break; 1490 1491 case O_QUEUE: 1492 bprint_uint_arg(bp, "queue ", cmd->arg1); 1493 break; 1494 1495 case O_DIVERT: 1496 bprint_uint_arg(bp, "divert ", cmd->arg1); 1497 break; 1498 1499 case O_TEE: 1500 bprint_uint_arg(bp, "tee ", cmd->arg1); 1501 break; 1502 1503 case O_NETGRAPH: 1504 bprint_uint_arg(bp, "netgraph ", cmd->arg1); 1505 break; 1506 1507 case O_NGTEE: 1508 bprint_uint_arg(bp, "ngtee ", cmd->arg1); 1509 break; 1510 1511 case O_FORWARD_IP: 1512 { 1513 ipfw_insn_sa *s = (ipfw_insn_sa *)cmd; 1514 1515 if (s->sa.sin_addr.s_addr == INADDR_ANY) { 1516 bprintf(bp, "fwd tablearg"); 1517 } else { 1518 bprintf(bp, "fwd %s",inet_ntoa(s->sa.sin_addr)); 1519 } 1520 if (s->sa.sin_port) 1521 bprintf(bp, ",%d", s->sa.sin_port); 1522 } 1523 break; 1524 1525 case O_FORWARD_IP6: 1526 { 1527 char buf[4 + INET6_ADDRSTRLEN + 1]; 1528 ipfw_insn_sa6 *s = (ipfw_insn_sa6 *)cmd; 1529 1530 bprintf(bp, "fwd %s", inet_ntop(AF_INET6, 1531 &s->sa.sin6_addr, buf, sizeof(buf))); 1532 if (s->sa.sin6_port) 1533 bprintf(bp, ",%d", s->sa.sin6_port); 1534 } 1535 break; 1536 1537 case O_LOG: /* O_LOG is printed last */ 1538 logptr = (ipfw_insn_log *)cmd; 1539 break; 1540 1541 case O_ALTQ: /* O_ALTQ is printed after O_LOG */ 1542 altqptr = (ipfw_insn_altq *)cmd; 1543 break; 1544 1545 case O_TAG: 1546 tagptr = cmd; 1547 break; 1548 1549 case O_NAT: 1550 if (cmd->arg1 != 0) 1551 bprint_uint_arg(bp, "nat ", cmd->arg1); 1552 else 1553 bprintf(bp, "nat global"); 1554 break; 1555 1556 case O_SETFIB: 1557 bprint_uint_arg(bp, "setfib ", cmd->arg1 & 0x7FFF); 1558 break; 1559 1560 case O_SETDSCP: 1561 { 1562 const char *code; 1563 1564 if (cmd->arg1 == IP_FW_TARG) { 1565 bprint_uint_arg(bp, "setdscp ", cmd->arg1); 1566 break; 1567 } 1568 uval = cmd->arg1 & 0x3F; 1569 if ((code = match_value(f_ipdscp, uval)) != NULL) 1570 bprintf(bp, "setdscp %s", code); 1571 else 1572 bprint_uint_arg(bp, "setdscp ", uval); 1573 } 1574 break; 1575 1576 case O_REASS: 1577 bprintf(bp, "reass"); 1578 break; 1579 1580 case O_CALLRETURN: 1581 if (cmd->len & F_NOT) 1582 bprintf(bp, "return"); 1583 else 1584 bprint_uint_arg(bp, "call ", cmd->arg1); 1585 break; 1586 1587 default: 1588 bprintf(bp, "** unrecognized action %d len %d ", 1589 cmd->opcode, cmd->len); 1590 } 1591 } 1592 if (logptr) { 1593 if (logptr->max_log > 0) 1594 bprintf(bp, " log logamount %d", logptr->max_log); 1595 else 1596 bprintf(bp, " log"); 1597 } 1598 #ifndef NO_ALTQ 1599 if (altqptr) { 1600 print_altq_cmd(bp, altqptr); 1601 } 1602 #endif 1603 if (tagptr) { 1604 if (tagptr->len & F_NOT) 1605 bprint_uint_arg(bp, " untag ", tagptr->arg1); 1606 else 1607 bprint_uint_arg(bp, " tag ", tagptr->arg1); 1608 } 1609 1610 /* 1611 * then print the body. 1612 */ 1613 for (l = rule->act_ofs, cmd = rule->cmd; 1614 l > 0 ; l -= F_LEN(cmd) , cmd += F_LEN(cmd)) { 1615 if ((cmd->len & F_OR) || (cmd->len & F_NOT)) 1616 continue; 1617 if (cmd->opcode == O_IP4) { 1618 flags |= HAVE_PROTO4; 1619 break; 1620 } else if (cmd->opcode == O_IP6) { 1621 flags |= HAVE_PROTO6; 1622 break; 1623 } 1624 } 1625 if (rule->flags & IPFW_RULE_NOOPT) { /* empty rules before options */ 1626 if (!co->do_compact) { 1627 show_prerequisites(bp, &flags, HAVE_PROTO, 0); 1628 bprintf(bp, " from any to any"); 1629 } 1630 flags |= HAVE_IP | HAVE_OPTIONS | HAVE_PROTO | 1631 HAVE_SRCIP | HAVE_DSTIP; 1632 } 1633 1634 if (co->comment_only) 1635 comment = "..."; 1636 1637 for (l = rule->act_ofs, cmd = rule->cmd; 1638 l > 0 ; l -= F_LEN(cmd) , cmd += F_LEN(cmd)) { 1639 /* useful alias */ 1640 ipfw_insn_u32 *cmd32 = (ipfw_insn_u32 *)cmd; 1641 1642 if (co->comment_only) { 1643 if (cmd->opcode != O_NOP) 1644 continue; 1645 bprintf(bp, " // %s\n", (char *)(cmd + 1)); 1646 return; 1647 } 1648 1649 show_prerequisites(bp, &flags, 0, cmd->opcode); 1650 1651 switch(cmd->opcode) { 1652 case O_PROB: 1653 break; /* done already */ 1654 1655 case O_PROBE_STATE: 1656 break; /* no need to print anything here */ 1657 1658 case O_IP_SRC: 1659 case O_IP_SRC_LOOKUP: 1660 case O_IP_SRC_MASK: 1661 case O_IP_SRC_ME: 1662 case O_IP_SRC_SET: 1663 show_prerequisites(bp, &flags, HAVE_PROTO, 0); 1664 if (!(flags & HAVE_SRCIP)) 1665 bprintf(bp, " from"); 1666 if ((cmd->len & F_OR) && !or_block) 1667 bprintf(bp, " {"); 1668 print_ip(bp, fo, (ipfw_insn_ip *)cmd, 1669 (flags & HAVE_OPTIONS) ? " src-ip" : ""); 1670 flags |= HAVE_SRCIP; 1671 break; 1672 1673 case O_IP_DST: 1674 case O_IP_DST_LOOKUP: 1675 case O_IP_DST_MASK: 1676 case O_IP_DST_ME: 1677 case O_IP_DST_SET: 1678 show_prerequisites(bp, &flags, HAVE_PROTO|HAVE_SRCIP, 0); 1679 if (!(flags & HAVE_DSTIP)) 1680 bprintf(bp, " to"); 1681 if ((cmd->len & F_OR) && !or_block) 1682 bprintf(bp, " {"); 1683 print_ip(bp, fo, (ipfw_insn_ip *)cmd, 1684 (flags & HAVE_OPTIONS) ? " dst-ip" : ""); 1685 flags |= HAVE_DSTIP; 1686 break; 1687 1688 case O_IP6_SRC: 1689 case O_IP6_SRC_MASK: 1690 case O_IP6_SRC_ME: 1691 show_prerequisites(bp, &flags, HAVE_PROTO, 0); 1692 if (!(flags & HAVE_SRCIP)) 1693 bprintf(bp, " from"); 1694 if ((cmd->len & F_OR) && !or_block) 1695 bprintf(bp, " {"); 1696 print_ip6(bp, (ipfw_insn_ip6 *)cmd, 1697 (flags & HAVE_OPTIONS) ? " src-ip6" : ""); 1698 flags |= HAVE_SRCIP | HAVE_PROTO; 1699 break; 1700 1701 case O_IP6_DST: 1702 case O_IP6_DST_MASK: 1703 case O_IP6_DST_ME: 1704 show_prerequisites(bp, &flags, HAVE_PROTO|HAVE_SRCIP, 0); 1705 if (!(flags & HAVE_DSTIP)) 1706 bprintf(bp, " to"); 1707 if ((cmd->len & F_OR) && !or_block) 1708 bprintf(bp, " {"); 1709 print_ip6(bp, (ipfw_insn_ip6 *)cmd, 1710 (flags & HAVE_OPTIONS) ? " dst-ip6" : ""); 1711 flags |= HAVE_DSTIP; 1712 break; 1713 1714 case O_FLOW6ID: 1715 print_flow6id(bp, (ipfw_insn_u32 *) cmd ); 1716 flags |= HAVE_OPTIONS; 1717 break; 1718 1719 case O_IP_DSTPORT: 1720 show_prerequisites(bp, &flags, 1721 HAVE_PROTO | HAVE_SRCIP | 1722 HAVE_DSTIP | HAVE_IP, 0); 1723 case O_IP_SRCPORT: 1724 if (flags & HAVE_DSTIP) 1725 flags |= HAVE_IP; 1726 show_prerequisites(bp, &flags, 1727 HAVE_PROTO | HAVE_SRCIP, 0); 1728 if ((cmd->len & F_OR) && !or_block) 1729 bprintf(bp, " {"); 1730 if (cmd->len & F_NOT) 1731 bprintf(bp, " not"); 1732 print_newports(bp, (ipfw_insn_u16 *)cmd, proto, 1733 (flags & HAVE_OPTIONS) ? cmd->opcode : 0); 1734 break; 1735 1736 case O_PROTO: { 1737 struct protoent *pe = NULL; 1738 1739 if ((cmd->len & F_OR) && !or_block) 1740 bprintf(bp, " {"); 1741 if (cmd->len & F_NOT) 1742 bprintf(bp, " not"); 1743 proto = cmd->arg1; 1744 pe = getprotobynumber(cmd->arg1); 1745 if ((flags & (HAVE_PROTO4 | HAVE_PROTO6)) && 1746 !(flags & HAVE_PROTO)) 1747 show_prerequisites(bp, &flags, 1748 HAVE_PROTO | HAVE_IP | HAVE_SRCIP | 1749 HAVE_DSTIP | HAVE_OPTIONS, 0); 1750 if (flags & HAVE_OPTIONS) 1751 bprintf(bp, " proto"); 1752 if (pe) 1753 bprintf(bp, " %s", pe->p_name); 1754 else 1755 bprintf(bp, " %u", cmd->arg1); 1756 } 1757 flags |= HAVE_PROTO; 1758 break; 1759 1760 default: /*options ... */ 1761 if (!(cmd->len & (F_OR|F_NOT))) 1762 if (((cmd->opcode == O_IP6) && 1763 (flags & HAVE_PROTO6)) || 1764 ((cmd->opcode == O_IP4) && 1765 (flags & HAVE_PROTO4))) 1766 break; 1767 show_prerequisites(bp, &flags, HAVE_PROTO | HAVE_SRCIP | 1768 HAVE_DSTIP | HAVE_IP | HAVE_OPTIONS, 0); 1769 if ((cmd->len & F_OR) && !or_block) 1770 bprintf(bp, " {"); 1771 if (cmd->len & F_NOT && cmd->opcode != O_IN) 1772 bprintf(bp, " not"); 1773 switch(cmd->opcode) { 1774 case O_MACADDR2: { 1775 ipfw_insn_mac *m = (ipfw_insn_mac *)cmd; 1776 1777 bprintf(bp, " MAC"); 1778 print_mac(bp, m->addr, m->mask); 1779 print_mac(bp, m->addr + 6, m->mask + 6); 1780 } 1781 break; 1782 1783 case O_MAC_TYPE: 1784 print_newports(bp, (ipfw_insn_u16 *)cmd, 1785 IPPROTO_ETHERTYPE, cmd->opcode); 1786 break; 1787 1788 1789 case O_FRAG: 1790 bprintf(bp, " frag"); 1791 break; 1792 1793 case O_FIB: 1794 bprintf(bp, " fib %u", cmd->arg1 ); 1795 break; 1796 case O_SOCKARG: 1797 bprintf(bp, " sockarg"); 1798 break; 1799 1800 case O_IN: 1801 bprintf(bp, cmd->len & F_NOT ? " out" : " in"); 1802 break; 1803 1804 case O_DIVERTED: 1805 switch (cmd->arg1) { 1806 case 3: 1807 bprintf(bp, " diverted"); 1808 break; 1809 case 1: 1810 bprintf(bp, " diverted-loopback"); 1811 break; 1812 case 2: 1813 bprintf(bp, " diverted-output"); 1814 break; 1815 default: 1816 bprintf(bp, " diverted-?<%u>", cmd->arg1); 1817 break; 1818 } 1819 break; 1820 1821 case O_LAYER2: 1822 bprintf(bp, " layer2"); 1823 break; 1824 case O_XMIT: 1825 case O_RECV: 1826 case O_VIA: 1827 { 1828 char const *s, *t; 1829 ipfw_insn_if *cmdif = (ipfw_insn_if *)cmd; 1830 1831 if (cmd->opcode == O_XMIT) 1832 s = "xmit"; 1833 else if (cmd->opcode == O_RECV) 1834 s = "recv"; 1835 else /* if (cmd->opcode == O_VIA) */ 1836 s = "via"; 1837 if (cmdif->name[0] == '\0') 1838 bprintf(bp, " %s %s", s, 1839 inet_ntoa(cmdif->p.ip)); 1840 else if (cmdif->name[0] == '\1') { 1841 /* interface table */ 1842 t = table_search_ctlv(fo->tstate, 1843 cmdif->p.kidx); 1844 bprintf(bp, " %s table(%s)", s, t); 1845 } else 1846 bprintf(bp, " %s %s", s, cmdif->name); 1847 1848 break; 1849 } 1850 case O_IP_FLOW_LOOKUP: 1851 { 1852 char *t; 1853 1854 t = table_search_ctlv(fo->tstate, cmd->arg1); 1855 bprintf(bp, " flow table(%s", t); 1856 if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_u32)) 1857 bprintf(bp, ",%u", 1858 ((ipfw_insn_u32 *)cmd)->d[0]); 1859 bprintf(bp, ")"); 1860 break; 1861 } 1862 case O_IPID: 1863 if (F_LEN(cmd) == 1) 1864 bprintf(bp, " ipid %u", cmd->arg1 ); 1865 else 1866 print_newports(bp, (ipfw_insn_u16 *)cmd, 0, 1867 O_IPID); 1868 break; 1869 1870 case O_IPTTL: 1871 if (F_LEN(cmd) == 1) 1872 bprintf(bp, " ipttl %u", cmd->arg1 ); 1873 else 1874 print_newports(bp, (ipfw_insn_u16 *)cmd, 0, 1875 O_IPTTL); 1876 break; 1877 1878 case O_IPVER: 1879 bprintf(bp, " ipver %u", cmd->arg1 ); 1880 break; 1881 1882 case O_IPPRECEDENCE: 1883 bprintf(bp, " ipprecedence %u", cmd->arg1 >> 5); 1884 break; 1885 1886 case O_DSCP: 1887 print_dscp(bp, (ipfw_insn_u32 *)cmd); 1888 break; 1889 1890 case O_IPLEN: 1891 if (F_LEN(cmd) == 1) 1892 bprintf(bp, " iplen %u", cmd->arg1 ); 1893 else 1894 print_newports(bp, (ipfw_insn_u16 *)cmd, 0, 1895 O_IPLEN); 1896 break; 1897 1898 case O_IPOPT: 1899 print_flags(bp, "ipoptions", cmd, f_ipopts); 1900 break; 1901 1902 case O_IPTOS: 1903 print_flags(bp, "iptos", cmd, f_iptos); 1904 break; 1905 1906 case O_ICMPTYPE: 1907 print_icmptypes(bp, (ipfw_insn_u32 *)cmd); 1908 break; 1909 1910 case O_ESTAB: 1911 bprintf(bp, " established"); 1912 break; 1913 1914 case O_TCPDATALEN: 1915 if (F_LEN(cmd) == 1) 1916 bprintf(bp, " tcpdatalen %u", cmd->arg1 ); 1917 else 1918 print_newports(bp, (ipfw_insn_u16 *)cmd, 0, 1919 O_TCPDATALEN); 1920 break; 1921 1922 case O_TCPFLAGS: 1923 print_flags(bp, "tcpflags", cmd, f_tcpflags); 1924 break; 1925 1926 case O_TCPOPTS: 1927 print_flags(bp, "tcpoptions", cmd, f_tcpopts); 1928 break; 1929 1930 case O_TCPWIN: 1931 if (F_LEN(cmd) == 1) 1932 bprintf(bp, " tcpwin %u", cmd->arg1); 1933 else 1934 print_newports(bp, (ipfw_insn_u16 *)cmd, 0, 1935 O_TCPWIN); 1936 break; 1937 1938 case O_TCPACK: 1939 bprintf(bp, " tcpack %d", ntohl(cmd32->d[0])); 1940 break; 1941 1942 case O_TCPSEQ: 1943 bprintf(bp, " tcpseq %d", ntohl(cmd32->d[0])); 1944 break; 1945 1946 case O_UID: 1947 { 1948 struct passwd *pwd = getpwuid(cmd32->d[0]); 1949 1950 if (pwd) 1951 bprintf(bp, " uid %s", pwd->pw_name); 1952 else 1953 bprintf(bp, " uid %u", cmd32->d[0]); 1954 } 1955 break; 1956 1957 case O_GID: 1958 { 1959 struct group *grp = getgrgid(cmd32->d[0]); 1960 1961 if (grp) 1962 bprintf(bp, " gid %s", grp->gr_name); 1963 else 1964 bprintf(bp, " gid %u", cmd32->d[0]); 1965 } 1966 break; 1967 1968 case O_JAIL: 1969 bprintf(bp, " jail %d", cmd32->d[0]); 1970 break; 1971 1972 case O_VERREVPATH: 1973 bprintf(bp, " verrevpath"); 1974 break; 1975 1976 case O_VERSRCREACH: 1977 bprintf(bp, " versrcreach"); 1978 break; 1979 1980 case O_ANTISPOOF: 1981 bprintf(bp, " antispoof"); 1982 break; 1983 1984 case O_IPSEC: 1985 bprintf(bp, " ipsec"); 1986 break; 1987 1988 case O_NOP: 1989 comment = (char *)(cmd + 1); 1990 break; 1991 1992 case O_KEEP_STATE: 1993 bprintf(bp, " keep-state"); 1994 break; 1995 1996 case O_LIMIT: { 1997 struct _s_x *p = limit_masks; 1998 ipfw_insn_limit *c = (ipfw_insn_limit *)cmd; 1999 uint8_t x = c->limit_mask; 2000 char const *comma = " "; 2001 2002 bprintf(bp, " limit"); 2003 for (; p->x != 0 ; p++) 2004 if ((x & p->x) == p->x) { 2005 x &= ~p->x; 2006 bprintf(bp, "%s%s", comma,p->s); 2007 comma = ","; 2008 } 2009 bprint_uint_arg(bp, " ", c->conn_limit); 2010 break; 2011 } 2012 2013 case O_IP6: 2014 bprintf(bp, " ip6"); 2015 break; 2016 2017 case O_IP4: 2018 bprintf(bp, " ip4"); 2019 break; 2020 2021 case O_ICMP6TYPE: 2022 print_icmp6types(bp, (ipfw_insn_u32 *)cmd); 2023 break; 2024 2025 case O_EXT_HDR: 2026 print_ext6hdr(bp, (ipfw_insn *)cmd); 2027 break; 2028 2029 case O_TAGGED: 2030 if (F_LEN(cmd) == 1) 2031 bprint_uint_arg(bp, " tagged ", 2032 cmd->arg1); 2033 else 2034 print_newports(bp, (ipfw_insn_u16 *)cmd, 2035 0, O_TAGGED); 2036 break; 2037 2038 default: 2039 bprintf(bp, " [opcode %d len %d]", 2040 cmd->opcode, cmd->len); 2041 } 2042 } 2043 if (cmd->len & F_OR) { 2044 bprintf(bp, " or"); 2045 or_block = 1; 2046 } else if (or_block) { 2047 bprintf(bp, " }"); 2048 or_block = 0; 2049 } 2050 } 2051 show_prerequisites(bp, &flags, HAVE_PROTO | HAVE_SRCIP | HAVE_DSTIP 2052 | HAVE_IP, 0); 2053 if (comment) 2054 bprintf(bp, " // %s", comment); 2055 bprintf(bp, "\n"); 2056 } 2057 2058 static void 2059 show_dyn_state(struct cmdline_opts *co, struct format_opts *fo, 2060 struct buf_pr *bp, ipfw_dyn_rule *d) 2061 { 2062 struct protoent *pe; 2063 struct in_addr a; 2064 uint16_t rulenum; 2065 char buf[INET6_ADDRSTRLEN]; 2066 2067 if (!co->do_expired) { 2068 if (!d->expire && !(d->dyn_type == O_LIMIT_PARENT)) 2069 return; 2070 } 2071 bcopy(&d->rule, &rulenum, sizeof(rulenum)); 2072 bprintf(bp, "%05d", rulenum); 2073 if (fo->pcwidth > 0 || fo->bcwidth > 0) { 2074 bprintf(bp, " "); 2075 pr_u64(bp, &d->pcnt, fo->pcwidth); 2076 pr_u64(bp, &d->bcnt, fo->bcwidth); 2077 bprintf(bp, "(%ds)", d->expire); 2078 } 2079 switch (d->dyn_type) { 2080 case O_LIMIT_PARENT: 2081 bprintf(bp, " PARENT %d", d->count); 2082 break; 2083 case O_LIMIT: 2084 bprintf(bp, " LIMIT"); 2085 break; 2086 case O_KEEP_STATE: /* bidir, no mask */ 2087 bprintf(bp, " STATE"); 2088 break; 2089 } 2090 2091 if ((pe = getprotobynumber(d->id.proto)) != NULL) 2092 bprintf(bp, " %s", pe->p_name); 2093 else 2094 bprintf(bp, " proto %u", d->id.proto); 2095 2096 if (d->id.addr_type == 4) { 2097 a.s_addr = htonl(d->id.src_ip); 2098 bprintf(bp, " %s %d", inet_ntoa(a), d->id.src_port); 2099 2100 a.s_addr = htonl(d->id.dst_ip); 2101 bprintf(bp, " <-> %s %d", inet_ntoa(a), d->id.dst_port); 2102 } else if (d->id.addr_type == 6) { 2103 bprintf(bp, " %s %d", inet_ntop(AF_INET6, &d->id.src_ip6, buf, 2104 sizeof(buf)), d->id.src_port); 2105 bprintf(bp, " <-> %s %d", inet_ntop(AF_INET6, &d->id.dst_ip6, 2106 buf, sizeof(buf)), d->id.dst_port); 2107 } else 2108 bprintf(bp, " UNKNOWN <-> UNKNOWN\n"); 2109 } 2110 2111 static int 2112 do_range_cmd(int cmd, ipfw_range_tlv *rt) 2113 { 2114 ipfw_range_header rh; 2115 size_t sz; 2116 2117 memset(&rh, 0, sizeof(rh)); 2118 memcpy(&rh.range, rt, sizeof(*rt)); 2119 rh.range.head.length = sizeof(*rt); 2120 rh.range.head.type = IPFW_TLV_RANGE; 2121 sz = sizeof(rh); 2122 2123 if (do_get3(cmd, &rh.opheader, &sz) != 0) 2124 return (-1); 2125 /* Save number of matched objects */ 2126 rt->new_set = rh.range.new_set; 2127 return (0); 2128 } 2129 2130 /* 2131 * This one handles all set-related commands 2132 * ipfw set { show | enable | disable } 2133 * ipfw set swap X Y 2134 * ipfw set move X to Y 2135 * ipfw set move rule X to Y 2136 */ 2137 void 2138 ipfw_sets_handler(char *av[]) 2139 { 2140 uint32_t masks[2]; 2141 int i; 2142 uint8_t cmd, rulenum; 2143 ipfw_range_tlv rt; 2144 char *msg; 2145 size_t size; 2146 2147 av++; 2148 memset(&rt, 0, sizeof(rt)); 2149 2150 if (av[0] == NULL) 2151 errx(EX_USAGE, "set needs command"); 2152 if (_substrcmp(*av, "show") == 0) { 2153 struct format_opts fo; 2154 ipfw_cfg_lheader *cfg; 2155 2156 memset(&fo, 0, sizeof(fo)); 2157 if (ipfw_get_config(&co, &fo, &cfg, &size) != 0) 2158 err(EX_OSERR, "requesting config failed"); 2159 2160 for (i = 0, msg = "disable"; i < RESVD_SET; i++) 2161 if ((cfg->set_mask & (1<<i)) == 0) { 2162 printf("%s %d", msg, i); 2163 msg = ""; 2164 } 2165 msg = (cfg->set_mask != (uint32_t)-1) ? " enable" : "enable"; 2166 for (i = 0; i < RESVD_SET; i++) 2167 if ((cfg->set_mask & (1<<i)) != 0) { 2168 printf("%s %d", msg, i); 2169 msg = ""; 2170 } 2171 printf("\n"); 2172 free(cfg); 2173 } else if (_substrcmp(*av, "swap") == 0) { 2174 av++; 2175 if ( av[0] == NULL || av[1] == NULL ) 2176 errx(EX_USAGE, "set swap needs 2 set numbers\n"); 2177 rt.set = atoi(av[0]); 2178 rt.new_set = atoi(av[1]); 2179 if (!isdigit(*(av[0])) || rt.set > RESVD_SET) 2180 errx(EX_DATAERR, "invalid set number %s\n", av[0]); 2181 if (!isdigit(*(av[1])) || rt.new_set > RESVD_SET) 2182 errx(EX_DATAERR, "invalid set number %s\n", av[1]); 2183 i = do_range_cmd(IP_FW_SET_SWAP, &rt); 2184 } else if (_substrcmp(*av, "move") == 0) { 2185 av++; 2186 if (av[0] && _substrcmp(*av, "rule") == 0) { 2187 rt.flags = IPFW_RCFLAG_RANGE; /* move rules to new set */ 2188 cmd = IP_FW_XMOVE; 2189 av++; 2190 } else 2191 cmd = IP_FW_SET_MOVE; /* Move set to new one */ 2192 if (av[0] == NULL || av[1] == NULL || av[2] == NULL || 2193 av[3] != NULL || _substrcmp(av[1], "to") != 0) 2194 errx(EX_USAGE, "syntax: set move [rule] X to Y\n"); 2195 rulenum = atoi(av[0]); 2196 rt.new_set = atoi(av[2]); 2197 if (cmd == IP_FW_XMOVE) { 2198 rt.start_rule = rulenum; 2199 rt.end_rule = rulenum; 2200 } else 2201 rt.set = rulenum; 2202 rt.new_set = atoi(av[2]); 2203 if (!isdigit(*(av[0])) || (cmd == 3 && rt.set > RESVD_SET) || 2204 (cmd == 2 && rt.start_rule == IPFW_DEFAULT_RULE) ) 2205 errx(EX_DATAERR, "invalid source number %s\n", av[0]); 2206 if (!isdigit(*(av[2])) || rt.new_set > RESVD_SET) 2207 errx(EX_DATAERR, "invalid dest. set %s\n", av[1]); 2208 i = do_range_cmd(cmd, &rt); 2209 } else if (_substrcmp(*av, "disable") == 0 || 2210 _substrcmp(*av, "enable") == 0 ) { 2211 int which = _substrcmp(*av, "enable") == 0 ? 1 : 0; 2212 2213 av++; 2214 masks[0] = masks[1] = 0; 2215 2216 while (av[0]) { 2217 if (isdigit(**av)) { 2218 i = atoi(*av); 2219 if (i < 0 || i > RESVD_SET) 2220 errx(EX_DATAERR, 2221 "invalid set number %d\n", i); 2222 masks[which] |= (1<<i); 2223 } else if (_substrcmp(*av, "disable") == 0) 2224 which = 0; 2225 else if (_substrcmp(*av, "enable") == 0) 2226 which = 1; 2227 else 2228 errx(EX_DATAERR, 2229 "invalid set command %s\n", *av); 2230 av++; 2231 } 2232 if ( (masks[0] & masks[1]) != 0 ) 2233 errx(EX_DATAERR, 2234 "cannot enable and disable the same set\n"); 2235 2236 rt.set = masks[0]; 2237 rt.new_set = masks[1]; 2238 i = do_range_cmd(IP_FW_SET_ENABLE, &rt); 2239 if (i) 2240 warn("set enable/disable: setsockopt(IP_FW_SET_ENABLE)"); 2241 } else 2242 errx(EX_USAGE, "invalid set command %s\n", *av); 2243 } 2244 2245 void 2246 ipfw_sysctl_handler(char *av[], int which) 2247 { 2248 av++; 2249 2250 if (av[0] == NULL) { 2251 warnx("missing keyword to enable/disable\n"); 2252 } else if (_substrcmp(*av, "firewall") == 0) { 2253 sysctlbyname("net.inet.ip.fw.enable", NULL, 0, 2254 &which, sizeof(which)); 2255 sysctlbyname("net.inet6.ip6.fw.enable", NULL, 0, 2256 &which, sizeof(which)); 2257 } else if (_substrcmp(*av, "one_pass") == 0) { 2258 sysctlbyname("net.inet.ip.fw.one_pass", NULL, 0, 2259 &which, sizeof(which)); 2260 } else if (_substrcmp(*av, "debug") == 0) { 2261 sysctlbyname("net.inet.ip.fw.debug", NULL, 0, 2262 &which, sizeof(which)); 2263 } else if (_substrcmp(*av, "verbose") == 0) { 2264 sysctlbyname("net.inet.ip.fw.verbose", NULL, 0, 2265 &which, sizeof(which)); 2266 } else if (_substrcmp(*av, "dyn_keepalive") == 0) { 2267 sysctlbyname("net.inet.ip.fw.dyn_keepalive", NULL, 0, 2268 &which, sizeof(which)); 2269 #ifndef NO_ALTQ 2270 } else if (_substrcmp(*av, "altq") == 0) { 2271 altq_set_enabled(which); 2272 #endif 2273 } else { 2274 warnx("unrecognize enable/disable keyword: %s\n", *av); 2275 } 2276 } 2277 2278 typedef void state_cb(struct cmdline_opts *co, struct format_opts *fo, 2279 void *arg, void *state); 2280 2281 static void 2282 prepare_format_dyn(struct cmdline_opts *co, struct format_opts *fo, 2283 void *arg, void *_state) 2284 { 2285 ipfw_dyn_rule *d; 2286 int width; 2287 uint8_t set; 2288 2289 d = (ipfw_dyn_rule *)_state; 2290 /* Count _ALL_ states */ 2291 fo->dcnt++; 2292 2293 if (fo->show_counters == 0) 2294 return; 2295 2296 if (co->use_set) { 2297 /* skip states from another set */ 2298 bcopy((char *)&d->rule + sizeof(uint16_t), &set, 2299 sizeof(uint8_t)); 2300 if (set != co->use_set - 1) 2301 return; 2302 } 2303 2304 width = pr_u64(NULL, &d->pcnt, 0); 2305 if (width > fo->pcwidth) 2306 fo->pcwidth = width; 2307 2308 width = pr_u64(NULL, &d->bcnt, 0); 2309 if (width > fo->bcwidth) 2310 fo->bcwidth = width; 2311 } 2312 2313 static int 2314 foreach_state(struct cmdline_opts *co, struct format_opts *fo, 2315 caddr_t base, size_t sz, state_cb dyn_bc, void *dyn_arg) 2316 { 2317 int ttype; 2318 state_cb *fptr; 2319 void *farg; 2320 ipfw_obj_tlv *tlv; 2321 ipfw_obj_ctlv *ctlv; 2322 2323 fptr = NULL; 2324 ttype = 0; 2325 2326 while (sz > 0) { 2327 ctlv = (ipfw_obj_ctlv *)base; 2328 switch (ctlv->head.type) { 2329 case IPFW_TLV_DYNSTATE_LIST: 2330 base += sizeof(*ctlv); 2331 sz -= sizeof(*ctlv); 2332 ttype = IPFW_TLV_DYN_ENT; 2333 fptr = dyn_bc; 2334 farg = dyn_arg; 2335 break; 2336 default: 2337 return (sz); 2338 } 2339 2340 while (sz > 0) { 2341 tlv = (ipfw_obj_tlv *)base; 2342 if (tlv->type != ttype) 2343 break; 2344 2345 fptr(co, fo, farg, tlv + 1); 2346 sz -= tlv->length; 2347 base += tlv->length; 2348 } 2349 } 2350 2351 return (sz); 2352 } 2353 2354 static void 2355 prepare_format_opts(struct cmdline_opts *co, struct format_opts *fo, 2356 ipfw_obj_tlv *rtlv, int rcnt, caddr_t dynbase, size_t dynsz) 2357 { 2358 int bcwidth, pcwidth, width; 2359 int n; 2360 struct ip_fw_bcounter *cntr; 2361 struct ip_fw_rule *r; 2362 2363 bcwidth = 0; 2364 pcwidth = 0; 2365 if (fo->show_counters != 0) { 2366 for (n = 0; n < rcnt; n++, 2367 rtlv = (ipfw_obj_tlv *)((caddr_t)rtlv + rtlv->length)) { 2368 cntr = (struct ip_fw_bcounter *)(rtlv + 1); 2369 r = (struct ip_fw_rule *)((caddr_t)cntr + cntr->size); 2370 /* skip rules from another set */ 2371 if (co->use_set && r->set != co->use_set - 1) 2372 continue; 2373 2374 /* packet counter */ 2375 width = pr_u64(NULL, &cntr->pcnt, 0); 2376 if (width > pcwidth) 2377 pcwidth = width; 2378 2379 /* byte counter */ 2380 width = pr_u64(NULL, &cntr->bcnt, 0); 2381 if (width > bcwidth) 2382 bcwidth = width; 2383 } 2384 } 2385 fo->bcwidth = bcwidth; 2386 fo->pcwidth = pcwidth; 2387 2388 fo->dcnt = 0; 2389 if (co->do_dynamic && dynsz > 0) 2390 foreach_state(co, fo, dynbase, dynsz, prepare_format_dyn, NULL); 2391 } 2392 2393 static int 2394 list_static_range(struct cmdline_opts *co, struct format_opts *fo, 2395 struct buf_pr *bp, ipfw_obj_tlv *rtlv, int rcnt) 2396 { 2397 int n, seen; 2398 struct ip_fw_rule *r; 2399 struct ip_fw_bcounter *cntr; 2400 int c = 0; 2401 2402 for (n = seen = 0; n < rcnt; n++, 2403 rtlv = (ipfw_obj_tlv *)((caddr_t)rtlv + rtlv->length)) { 2404 2405 if (fo->show_counters != 0) { 2406 cntr = (struct ip_fw_bcounter *)(rtlv + 1); 2407 r = (struct ip_fw_rule *)((caddr_t)cntr + cntr->size); 2408 } else { 2409 cntr = NULL; 2410 r = (struct ip_fw_rule *)(rtlv + 1); 2411 } 2412 if (r->rulenum > fo->last) 2413 break; 2414 if (co->use_set && r->set != co->use_set - 1) 2415 continue; 2416 if (r->rulenum >= fo->first && r->rulenum <= fo->last) { 2417 show_static_rule(co, fo, bp, r, cntr); 2418 printf("%s", bp->buf); 2419 c += rtlv->length; 2420 bp_flush(bp); 2421 seen++; 2422 } 2423 } 2424 2425 return (seen); 2426 } 2427 2428 static void 2429 list_dyn_state(struct cmdline_opts *co, struct format_opts *fo, 2430 void *_arg, void *_state) 2431 { 2432 uint16_t rulenum; 2433 uint8_t set; 2434 ipfw_dyn_rule *d; 2435 struct buf_pr *bp; 2436 2437 d = (ipfw_dyn_rule *)_state; 2438 bp = (struct buf_pr *)_arg; 2439 2440 bcopy(&d->rule, &rulenum, sizeof(rulenum)); 2441 if (rulenum > fo->last) 2442 return; 2443 if (co->use_set) { 2444 bcopy((char *)&d->rule + sizeof(uint16_t), 2445 &set, sizeof(uint8_t)); 2446 if (set != co->use_set - 1) 2447 return; 2448 } 2449 if (rulenum >= fo->first) { 2450 show_dyn_state(co, fo, bp, d); 2451 printf("%s\n", bp->buf); 2452 bp_flush(bp); 2453 } 2454 } 2455 2456 static int 2457 list_dyn_range(struct cmdline_opts *co, struct format_opts *fo, 2458 struct buf_pr *bp, caddr_t base, size_t sz) 2459 { 2460 2461 sz = foreach_state(co, fo, base, sz, list_dyn_state, bp); 2462 return (sz); 2463 } 2464 2465 void 2466 ipfw_list(int ac, char *av[], int show_counters) 2467 { 2468 ipfw_cfg_lheader *cfg; 2469 struct format_opts sfo; 2470 size_t sz; 2471 int error; 2472 int lac; 2473 char **lav; 2474 uint32_t rnum; 2475 char *endptr; 2476 2477 if (co.test_only) { 2478 fprintf(stderr, "Testing only, list disabled\n"); 2479 return; 2480 } 2481 if (co.do_pipe) { 2482 dummynet_list(ac, av, show_counters); 2483 return; 2484 } 2485 2486 ac--; 2487 av++; 2488 memset(&sfo, 0, sizeof(sfo)); 2489 2490 /* Determine rule range to request */ 2491 if (ac > 0) { 2492 for (lac = ac, lav = av; lac != 0; lac--) { 2493 rnum = strtoul(*lav++, &endptr, 10); 2494 if (sfo.first == 0 || rnum < sfo.first) 2495 sfo.first = rnum; 2496 2497 if (*endptr == '-') 2498 rnum = strtoul(endptr + 1, &endptr, 10); 2499 if (sfo.last == 0 || rnum > sfo.last) 2500 sfo.last = rnum; 2501 } 2502 } 2503 2504 /* get configuraion from kernel */ 2505 cfg = NULL; 2506 sfo.show_counters = show_counters; 2507 sfo.flags = IPFW_CFG_GET_STATIC; 2508 if (co.do_dynamic != 0) 2509 sfo.flags |= IPFW_CFG_GET_STATES; 2510 if (sfo.show_counters != 0) 2511 sfo.flags |= IPFW_CFG_GET_COUNTERS; 2512 if (ipfw_get_config(&co, &sfo, &cfg, &sz) != 0) 2513 err(EX_OSERR, "retrieving config failed"); 2514 2515 error = ipfw_show_config(&co, &sfo, cfg, sz, ac, av); 2516 2517 free(cfg); 2518 2519 if (error != EX_OK) 2520 exit(error); 2521 } 2522 2523 static int 2524 ipfw_show_config(struct cmdline_opts *co, struct format_opts *fo, 2525 ipfw_cfg_lheader *cfg, size_t sz, int ac, char *av[]) 2526 { 2527 caddr_t dynbase; 2528 size_t dynsz; 2529 int rcnt; 2530 int exitval = EX_OK; 2531 int lac; 2532 char **lav; 2533 char *endptr; 2534 size_t readsz; 2535 struct buf_pr bp; 2536 ipfw_obj_ctlv *ctlv, *tstate; 2537 ipfw_obj_tlv *rbase; 2538 2539 /* 2540 * Handle tablenames TLV first, if any 2541 */ 2542 tstate = NULL; 2543 rbase = NULL; 2544 dynbase = NULL; 2545 dynsz = 0; 2546 readsz = sizeof(*cfg); 2547 rcnt = 0; 2548 2549 fo->set_mask = cfg->set_mask; 2550 2551 ctlv = (ipfw_obj_ctlv *)(cfg + 1); 2552 2553 if (cfg->flags & IPFW_CFG_GET_STATIC) { 2554 /* We've requested static rules */ 2555 if (ctlv->head.type == IPFW_TLV_TBLNAME_LIST) { 2556 fo->tstate = ctlv; 2557 readsz += ctlv->head.length; 2558 ctlv = (ipfw_obj_ctlv *)((caddr_t)ctlv + 2559 ctlv->head.length); 2560 } 2561 2562 if (ctlv->head.type == IPFW_TLV_RULE_LIST) { 2563 rbase = (ipfw_obj_tlv *)(ctlv + 1); 2564 rcnt = ctlv->count; 2565 readsz += ctlv->head.length; 2566 ctlv = (ipfw_obj_ctlv *)((caddr_t)ctlv + 2567 ctlv->head.length); 2568 } 2569 } 2570 2571 if ((cfg->flags & IPFW_CFG_GET_STATES) && (readsz != sz)) { 2572 /* We may have some dynamic states */ 2573 dynsz = sz - readsz; 2574 /* Skip empty header */ 2575 if (dynsz != sizeof(ipfw_obj_ctlv)) 2576 dynbase = (caddr_t)ctlv; 2577 else 2578 dynsz = 0; 2579 } 2580 2581 prepare_format_opts(co, fo, rbase, rcnt, dynbase, dynsz); 2582 bp_alloc(&bp, 4096); 2583 2584 /* if no rule numbers were specified, list all rules */ 2585 if (ac == 0) { 2586 fo->first = 0; 2587 fo->last = IPFW_DEFAULT_RULE; 2588 list_static_range(co, fo, &bp, rbase, rcnt); 2589 2590 if (co->do_dynamic && dynsz > 0) { 2591 printf("## Dynamic rules (%d %zu):\n", fo->dcnt, dynsz); 2592 list_dyn_range(co, fo, &bp, dynbase, dynsz); 2593 } 2594 2595 bp_free(&bp); 2596 return (EX_OK); 2597 } 2598 2599 /* display specific rules requested on command line */ 2600 for (lac = ac, lav = av; lac != 0; lac--) { 2601 /* convert command line rule # */ 2602 fo->last = fo->first = strtoul(*lav++, &endptr, 10); 2603 if (*endptr == '-') 2604 fo->last = strtoul(endptr + 1, &endptr, 10); 2605 if (*endptr) { 2606 exitval = EX_USAGE; 2607 warnx("invalid rule number: %s", *(lav - 1)); 2608 continue; 2609 } 2610 2611 if (list_static_range(co, fo, &bp, rbase, rcnt) == 0) { 2612 /* give precedence to other error(s) */ 2613 if (exitval == EX_OK) 2614 exitval = EX_UNAVAILABLE; 2615 if (fo->first == fo->last) 2616 warnx("rule %u does not exist", fo->first); 2617 else 2618 warnx("no rules in range %u-%u", 2619 fo->first, fo->last); 2620 } 2621 } 2622 2623 if (co->do_dynamic && dynsz > 0) { 2624 printf("## Dynamic rules:\n"); 2625 for (lac = ac, lav = av; lac != 0; lac--) { 2626 fo->last = fo->first = strtoul(*lav++, &endptr, 10); 2627 if (*endptr == '-') 2628 fo->last = strtoul(endptr+1, &endptr, 10); 2629 if (*endptr) 2630 /* already warned */ 2631 continue; 2632 list_dyn_range(co, fo, &bp, dynbase, dynsz); 2633 } 2634 } 2635 2636 bp_free(&bp); 2637 return (exitval); 2638 } 2639 2640 2641 /* 2642 * Retrieves current ipfw configuration of given type 2643 * and stores its pointer to @pcfg. 2644 * 2645 * Caller is responsible for freeing @pcfg. 2646 * 2647 * Returns 0 on success. 2648 */ 2649 2650 static int 2651 ipfw_get_config(struct cmdline_opts *co, struct format_opts *fo, 2652 ipfw_cfg_lheader **pcfg, size_t *psize) 2653 { 2654 ipfw_cfg_lheader *cfg; 2655 size_t sz; 2656 int i; 2657 2658 2659 if (co->test_only != 0) { 2660 fprintf(stderr, "Testing only, list disabled\n"); 2661 return (0); 2662 } 2663 2664 /* Start with some data size */ 2665 sz = 4096; 2666 cfg = NULL; 2667 2668 for (i = 0; i < 16; i++) { 2669 if (cfg != NULL) 2670 free(cfg); 2671 if ((cfg = calloc(1, sz)) == NULL) 2672 return (ENOMEM); 2673 2674 cfg->flags = fo->flags; 2675 cfg->start_rule = fo->first; 2676 cfg->end_rule = fo->last; 2677 2678 if (do_get3(IP_FW_XGET, &cfg->opheader, &sz) != 0) { 2679 if (errno != ENOMEM) { 2680 free(cfg); 2681 return (errno); 2682 } 2683 2684 /* Buffer size is not enough. Try to increase */ 2685 sz = sz * 2; 2686 if (sz < cfg->size) 2687 sz = cfg->size; 2688 continue; 2689 } 2690 2691 *pcfg = cfg; 2692 *psize = sz; 2693 return (0); 2694 } 2695 2696 free(cfg); 2697 return (ENOMEM); 2698 } 2699 2700 static int 2701 lookup_host (char *host, struct in_addr *ipaddr) 2702 { 2703 struct hostent *he; 2704 2705 if (!inet_aton(host, ipaddr)) { 2706 if ((he = gethostbyname(host)) == NULL) 2707 return(-1); 2708 *ipaddr = *(struct in_addr *)he->h_addr_list[0]; 2709 } 2710 return(0); 2711 } 2712 2713 struct tidx { 2714 ipfw_obj_ntlv *idx; 2715 uint32_t count; 2716 uint32_t size; 2717 uint16_t counter; 2718 uint8_t set; 2719 }; 2720 2721 static uint16_t 2722 pack_table(struct tidx *tstate, char *name) 2723 { 2724 int i; 2725 ipfw_obj_ntlv *ntlv; 2726 2727 if (table_check_name(name) != 0) 2728 return (0); 2729 2730 for (i = 0; i < tstate->count; i++) { 2731 if (strcmp(tstate->idx[i].name, name) != 0) 2732 continue; 2733 if (tstate->idx[i].set != tstate->set) 2734 continue; 2735 2736 return (tstate->idx[i].idx); 2737 } 2738 2739 if (tstate->count + 1 > tstate->size) { 2740 tstate->size += 4; 2741 tstate->idx = realloc(tstate->idx, tstate->size * 2742 sizeof(ipfw_obj_ntlv)); 2743 if (tstate->idx == NULL) 2744 return (0); 2745 } 2746 2747 ntlv = &tstate->idx[i]; 2748 memset(ntlv, 0, sizeof(ipfw_obj_ntlv)); 2749 strlcpy(ntlv->name, name, sizeof(ntlv->name)); 2750 ntlv->head.type = IPFW_TLV_TBL_NAME; 2751 ntlv->head.length = sizeof(ipfw_obj_ntlv); 2752 ntlv->set = tstate->set; 2753 ntlv->idx = ++tstate->counter; 2754 tstate->count++; 2755 2756 return (ntlv->idx); 2757 } 2758 2759 static void 2760 fill_table(ipfw_insn *cmd, char *av, uint8_t opcode, struct tidx *tstate) 2761 { 2762 uint32_t *d = ((ipfw_insn_u32 *)cmd)->d; 2763 uint16_t uidx; 2764 char *p; 2765 2766 if ((p = strchr(av + 6, ')')) == NULL) 2767 errx(EX_DATAERR, "forgotten parenthesis: '%s'", av); 2768 *p = '\0'; 2769 p = strchr(av + 6, ','); 2770 if (p) 2771 *p++ = '\0'; 2772 2773 if ((uidx = pack_table(tstate, av + 6)) == 0) 2774 errx(EX_DATAERR, "Invalid table name: %s", av + 6); 2775 2776 cmd->opcode = opcode; 2777 cmd->arg1 = uidx; 2778 if (p) { 2779 cmd->len |= F_INSN_SIZE(ipfw_insn_u32); 2780 d[0] = strtoul(p, NULL, 0); 2781 } else 2782 cmd->len |= F_INSN_SIZE(ipfw_insn); 2783 } 2784 2785 2786 /* 2787 * fills the addr and mask fields in the instruction as appropriate from av. 2788 * Update length as appropriate. 2789 * The following formats are allowed: 2790 * me returns O_IP_*_ME 2791 * 1.2.3.4 single IP address 2792 * 1.2.3.4:5.6.7.8 address:mask 2793 * 1.2.3.4/24 address/mask 2794 * 1.2.3.4/26{1,6,5,4,23} set of addresses in a subnet 2795 * We can have multiple comma-separated address/mask entries. 2796 */ 2797 static void 2798 fill_ip(ipfw_insn_ip *cmd, char *av, int cblen, struct tidx *tstate) 2799 { 2800 int len = 0; 2801 uint32_t *d = ((ipfw_insn_u32 *)cmd)->d; 2802 2803 cmd->o.len &= ~F_LEN_MASK; /* zero len */ 2804 2805 if (_substrcmp(av, "any") == 0) 2806 return; 2807 2808 if (_substrcmp(av, "me") == 0) { 2809 cmd->o.len |= F_INSN_SIZE(ipfw_insn); 2810 return; 2811 } 2812 2813 if (strncmp(av, "table(", 6) == 0) { 2814 fill_table(&cmd->o, av, O_IP_DST_LOOKUP, tstate); 2815 return; 2816 } 2817 2818 while (av) { 2819 /* 2820 * After the address we can have '/' or ':' indicating a mask, 2821 * ',' indicating another address follows, '{' indicating a 2822 * set of addresses of unspecified size. 2823 */ 2824 char *t = NULL, *p = strpbrk(av, "/:,{"); 2825 int masklen; 2826 char md, nd = '\0'; 2827 2828 CHECK_LENGTH(cblen, F_INSN_SIZE(ipfw_insn) + 2 + len); 2829 2830 if (p) { 2831 md = *p; 2832 *p++ = '\0'; 2833 if ((t = strpbrk(p, ",{")) != NULL) { 2834 nd = *t; 2835 *t = '\0'; 2836 } 2837 } else 2838 md = '\0'; 2839 2840 if (lookup_host(av, (struct in_addr *)&d[0]) != 0) 2841 errx(EX_NOHOST, "hostname ``%s'' unknown", av); 2842 switch (md) { 2843 case ':': 2844 if (!inet_aton(p, (struct in_addr *)&d[1])) 2845 errx(EX_DATAERR, "bad netmask ``%s''", p); 2846 break; 2847 case '/': 2848 masklen = atoi(p); 2849 if (masklen == 0) 2850 d[1] = htonl(0); /* mask */ 2851 else if (masklen > 32) 2852 errx(EX_DATAERR, "bad width ``%s''", p); 2853 else 2854 d[1] = htonl(~0 << (32 - masklen)); 2855 break; 2856 case '{': /* no mask, assume /24 and put back the '{' */ 2857 d[1] = htonl(~0 << (32 - 24)); 2858 *(--p) = md; 2859 break; 2860 2861 case ',': /* single address plus continuation */ 2862 *(--p) = md; 2863 /* FALLTHROUGH */ 2864 case 0: /* initialization value */ 2865 default: 2866 d[1] = htonl(~0); /* force /32 */ 2867 break; 2868 } 2869 d[0] &= d[1]; /* mask base address with mask */ 2870 if (t) 2871 *t = nd; 2872 /* find next separator */ 2873 if (p) 2874 p = strpbrk(p, ",{"); 2875 if (p && *p == '{') { 2876 /* 2877 * We have a set of addresses. They are stored as follows: 2878 * arg1 is the set size (powers of 2, 2..256) 2879 * addr is the base address IN HOST FORMAT 2880 * mask.. is an array of arg1 bits (rounded up to 2881 * the next multiple of 32) with bits set 2882 * for each host in the map. 2883 */ 2884 uint32_t *map = (uint32_t *)&cmd->mask; 2885 int low, high; 2886 int i = contigmask((uint8_t *)&(d[1]), 32); 2887 2888 if (len > 0) 2889 errx(EX_DATAERR, "address set cannot be in a list"); 2890 if (i < 24 || i > 31) 2891 errx(EX_DATAERR, "invalid set with mask %d\n", i); 2892 cmd->o.arg1 = 1<<(32-i); /* map length */ 2893 d[0] = ntohl(d[0]); /* base addr in host format */ 2894 cmd->o.opcode = O_IP_DST_SET; /* default */ 2895 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32) + (cmd->o.arg1+31)/32; 2896 for (i = 0; i < (cmd->o.arg1+31)/32 ; i++) 2897 map[i] = 0; /* clear map */ 2898 2899 av = p + 1; 2900 low = d[0] & 0xff; 2901 high = low + cmd->o.arg1 - 1; 2902 /* 2903 * Here, i stores the previous value when we specify a range 2904 * of addresses within a mask, e.g. 45-63. i = -1 means we 2905 * have no previous value. 2906 */ 2907 i = -1; /* previous value in a range */ 2908 while (isdigit(*av)) { 2909 char *s; 2910 int a = strtol(av, &s, 0); 2911 2912 if (s == av) { /* no parameter */ 2913 if (*av != '}') 2914 errx(EX_DATAERR, "set not closed\n"); 2915 if (i != -1) 2916 errx(EX_DATAERR, "incomplete range %d-", i); 2917 break; 2918 } 2919 if (a < low || a > high) 2920 errx(EX_DATAERR, "addr %d out of range [%d-%d]\n", 2921 a, low, high); 2922 a -= low; 2923 if (i == -1) /* no previous in range */ 2924 i = a; 2925 else { /* check that range is valid */ 2926 if (i > a) 2927 errx(EX_DATAERR, "invalid range %d-%d", 2928 i+low, a+low); 2929 if (*s == '-') 2930 errx(EX_DATAERR, "double '-' in range"); 2931 } 2932 for (; i <= a; i++) 2933 map[i/32] |= 1<<(i & 31); 2934 i = -1; 2935 if (*s == '-') 2936 i = a; 2937 else if (*s == '}') 2938 break; 2939 av = s+1; 2940 } 2941 return; 2942 } 2943 av = p; 2944 if (av) /* then *av must be a ',' */ 2945 av++; 2946 2947 /* Check this entry */ 2948 if (d[1] == 0) { /* "any", specified as x.x.x.x/0 */ 2949 /* 2950 * 'any' turns the entire list into a NOP. 2951 * 'not any' never matches, so it is removed from the 2952 * list unless it is the only item, in which case we 2953 * report an error. 2954 */ 2955 if (cmd->o.len & F_NOT) { /* "not any" never matches */ 2956 if (av == NULL && len == 0) /* only this entry */ 2957 errx(EX_DATAERR, "not any never matches"); 2958 } 2959 /* else do nothing and skip this entry */ 2960 return; 2961 } 2962 /* A single IP can be stored in an optimized format */ 2963 if (d[1] == (uint32_t)~0 && av == NULL && len == 0) { 2964 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32); 2965 return; 2966 } 2967 len += 2; /* two words... */ 2968 d += 2; 2969 } /* end while */ 2970 if (len + 1 > F_LEN_MASK) 2971 errx(EX_DATAERR, "address list too long"); 2972 cmd->o.len |= len+1; 2973 } 2974 2975 2976 /* n2mask sets n bits of the mask */ 2977 void 2978 n2mask(struct in6_addr *mask, int n) 2979 { 2980 static int minimask[9] = 2981 { 0x00, 0x80, 0xc0, 0xe0, 0xf0, 0xf8, 0xfc, 0xfe, 0xff }; 2982 u_char *p; 2983 2984 memset(mask, 0, sizeof(struct in6_addr)); 2985 p = (u_char *) mask; 2986 for (; n > 0; p++, n -= 8) { 2987 if (n >= 8) 2988 *p = 0xff; 2989 else 2990 *p = minimask[n]; 2991 } 2992 return; 2993 } 2994 2995 static void 2996 fill_flags_cmd(ipfw_insn *cmd, enum ipfw_opcodes opcode, 2997 struct _s_x *flags, char *p) 2998 { 2999 char *e; 3000 uint32_t set = 0, clear = 0; 3001 3002 if (fill_flags(flags, p, &e, &set, &clear) != 0) 3003 errx(EX_DATAERR, "invalid flag %s", e); 3004 3005 cmd->opcode = opcode; 3006 cmd->len = (cmd->len & (F_NOT | F_OR)) | 1; 3007 cmd->arg1 = (set & 0xff) | ( (clear & 0xff) << 8); 3008 } 3009 3010 3011 void 3012 ipfw_delete(char *av[]) 3013 { 3014 int i; 3015 int exitval = EX_OK; 3016 int do_set = 0; 3017 ipfw_range_tlv rt; 3018 3019 av++; 3020 NEED1("missing rule specification"); 3021 memset(&rt, 0, sizeof(rt)); 3022 if ( *av && _substrcmp(*av, "set") == 0) { 3023 /* Do not allow using the following syntax: 3024 * ipfw set N delete set M 3025 */ 3026 if (co.use_set) 3027 errx(EX_DATAERR, "invalid syntax"); 3028 do_set = 1; /* delete set */ 3029 av++; 3030 } 3031 3032 /* Rule number */ 3033 while (*av && isdigit(**av)) { 3034 i = atoi(*av); av++; 3035 if (co.do_nat) { 3036 exitval = do_cmd(IP_FW_NAT_DEL, &i, sizeof i); 3037 if (exitval) { 3038 exitval = EX_UNAVAILABLE; 3039 warn("rule %u not available", i); 3040 } 3041 } else if (co.do_pipe) { 3042 exitval = ipfw_delete_pipe(co.do_pipe, i); 3043 } else { 3044 if (do_set != 0) { 3045 rt.set = i & 31; 3046 rt.flags = IPFW_RCFLAG_SET; 3047 } else { 3048 rt.start_rule = i & 0xffff; 3049 rt.end_rule = i & 0xffff; 3050 if (rt.start_rule == 0 && rt.end_rule == 0) 3051 rt.flags |= IPFW_RCFLAG_ALL; 3052 else 3053 rt.flags |= IPFW_RCFLAG_RANGE; 3054 if (co.use_set != 0) { 3055 rt.set = co.use_set - 1; 3056 rt.flags |= IPFW_RCFLAG_SET; 3057 } 3058 } 3059 i = do_range_cmd(IP_FW_XDEL, &rt); 3060 if (i != 0) { 3061 exitval = EX_UNAVAILABLE; 3062 warn("rule %u: setsockopt(IP_FW_XDEL)", 3063 rt.start_rule); 3064 } else if (rt.new_set == 0) { 3065 exitval = EX_UNAVAILABLE; 3066 if (rt.start_rule != rt.end_rule) 3067 warnx("no rules rules in %u-%u range", 3068 rt.start_rule, rt.end_rule); 3069 else 3070 warnx("rule %u not found", 3071 rt.start_rule); 3072 } 3073 } 3074 } 3075 if (exitval != EX_OK) 3076 exit(exitval); 3077 } 3078 3079 3080 /* 3081 * fill the interface structure. We do not check the name as we can 3082 * create interfaces dynamically, so checking them at insert time 3083 * makes relatively little sense. 3084 * Interface names containing '*', '?', or '[' are assumed to be shell 3085 * patterns which match interfaces. 3086 */ 3087 static void 3088 fill_iface(ipfw_insn_if *cmd, char *arg, int cblen, struct tidx *tstate) 3089 { 3090 char *p; 3091 uint16_t uidx; 3092 3093 cmd->name[0] = '\0'; 3094 cmd->o.len |= F_INSN_SIZE(ipfw_insn_if); 3095 3096 CHECK_CMDLEN; 3097 3098 /* Parse the interface or address */ 3099 if (strcmp(arg, "any") == 0) 3100 cmd->o.len = 0; /* effectively ignore this command */ 3101 else if (strncmp(arg, "table(", 6) == 0) { 3102 if ((p = strchr(arg + 6, ')')) == NULL) 3103 errx(EX_DATAERR, "forgotten parenthesis: '%s'", arg); 3104 *p = '\0'; 3105 p = strchr(arg + 6, ','); 3106 if (p) 3107 *p++ = '\0'; 3108 if ((uidx = pack_table(tstate, arg + 6)) == 0) 3109 errx(EX_DATAERR, "Invalid table name: %s", arg + 6); 3110 3111 cmd->name[0] = '\1'; /* Special value indicating table */ 3112 cmd->p.kidx = uidx; 3113 } else if (!isdigit(*arg)) { 3114 strlcpy(cmd->name, arg, sizeof(cmd->name)); 3115 cmd->p.glob = strpbrk(arg, "*?[") != NULL ? 1 : 0; 3116 } else if (!inet_aton(arg, &cmd->p.ip)) 3117 errx(EX_DATAERR, "bad ip address ``%s''", arg); 3118 } 3119 3120 static void 3121 get_mac_addr_mask(const char *p, uint8_t *addr, uint8_t *mask) 3122 { 3123 int i; 3124 size_t l; 3125 char *ap, *ptr, *optr; 3126 struct ether_addr *mac; 3127 const char *macset = "0123456789abcdefABCDEF:"; 3128 3129 if (strcmp(p, "any") == 0) { 3130 for (i = 0; i < ETHER_ADDR_LEN; i++) 3131 addr[i] = mask[i] = 0; 3132 return; 3133 } 3134 3135 optr = ptr = strdup(p); 3136 if ((ap = strsep(&ptr, "&/")) != NULL && *ap != 0) { 3137 l = strlen(ap); 3138 if (strspn(ap, macset) != l || (mac = ether_aton(ap)) == NULL) 3139 errx(EX_DATAERR, "Incorrect MAC address"); 3140 bcopy(mac, addr, ETHER_ADDR_LEN); 3141 } else 3142 errx(EX_DATAERR, "Incorrect MAC address"); 3143 3144 if (ptr != NULL) { /* we have mask? */ 3145 if (p[ptr - optr - 1] == '/') { /* mask len */ 3146 long ml = strtol(ptr, &ap, 10); 3147 if (*ap != 0 || ml > ETHER_ADDR_LEN * 8 || ml < 0) 3148 errx(EX_DATAERR, "Incorrect mask length"); 3149 for (i = 0; ml > 0 && i < ETHER_ADDR_LEN; ml -= 8, i++) 3150 mask[i] = (ml >= 8) ? 0xff: (~0) << (8 - ml); 3151 } else { /* mask */ 3152 l = strlen(ptr); 3153 if (strspn(ptr, macset) != l || 3154 (mac = ether_aton(ptr)) == NULL) 3155 errx(EX_DATAERR, "Incorrect mask"); 3156 bcopy(mac, mask, ETHER_ADDR_LEN); 3157 } 3158 } else { /* default mask: ff:ff:ff:ff:ff:ff */ 3159 for (i = 0; i < ETHER_ADDR_LEN; i++) 3160 mask[i] = 0xff; 3161 } 3162 for (i = 0; i < ETHER_ADDR_LEN; i++) 3163 addr[i] &= mask[i]; 3164 3165 free(optr); 3166 } 3167 3168 /* 3169 * helper function, updates the pointer to cmd with the length 3170 * of the current command, and also cleans up the first word of 3171 * the new command in case it has been clobbered before. 3172 */ 3173 static ipfw_insn * 3174 next_cmd(ipfw_insn *cmd, int *len) 3175 { 3176 *len -= F_LEN(cmd); 3177 CHECK_LENGTH(*len, 0); 3178 cmd += F_LEN(cmd); 3179 bzero(cmd, sizeof(*cmd)); 3180 return cmd; 3181 } 3182 3183 /* 3184 * Takes arguments and copies them into a comment 3185 */ 3186 static void 3187 fill_comment(ipfw_insn *cmd, char **av, int cblen) 3188 { 3189 int i, l; 3190 char *p = (char *)(cmd + 1); 3191 3192 cmd->opcode = O_NOP; 3193 cmd->len = (cmd->len & (F_NOT | F_OR)); 3194 3195 /* Compute length of comment string. */ 3196 for (i = 0, l = 0; av[i] != NULL; i++) 3197 l += strlen(av[i]) + 1; 3198 if (l == 0) 3199 return; 3200 if (l > 84) 3201 errx(EX_DATAERR, 3202 "comment too long (max 80 chars)"); 3203 l = 1 + (l+3)/4; 3204 cmd->len = (cmd->len & (F_NOT | F_OR)) | l; 3205 CHECK_CMDLEN; 3206 3207 for (i = 0; av[i] != NULL; i++) { 3208 strcpy(p, av[i]); 3209 p += strlen(av[i]); 3210 *p++ = ' '; 3211 } 3212 *(--p) = '\0'; 3213 } 3214 3215 /* 3216 * A function to fill simple commands of size 1. 3217 * Existing flags are preserved. 3218 */ 3219 static void 3220 fill_cmd(ipfw_insn *cmd, enum ipfw_opcodes opcode, int flags, uint16_t arg) 3221 { 3222 cmd->opcode = opcode; 3223 cmd->len = ((cmd->len | flags) & (F_NOT | F_OR)) | 1; 3224 cmd->arg1 = arg; 3225 } 3226 3227 /* 3228 * Fetch and add the MAC address and type, with masks. This generates one or 3229 * two microinstructions, and returns the pointer to the last one. 3230 */ 3231 static ipfw_insn * 3232 add_mac(ipfw_insn *cmd, char *av[], int cblen) 3233 { 3234 ipfw_insn_mac *mac; 3235 3236 if ( ( av[0] == NULL ) || ( av[1] == NULL ) ) 3237 errx(EX_DATAERR, "MAC dst src"); 3238 3239 cmd->opcode = O_MACADDR2; 3240 cmd->len = (cmd->len & (F_NOT | F_OR)) | F_INSN_SIZE(ipfw_insn_mac); 3241 CHECK_CMDLEN; 3242 3243 mac = (ipfw_insn_mac *)cmd; 3244 get_mac_addr_mask(av[0], mac->addr, mac->mask); /* dst */ 3245 get_mac_addr_mask(av[1], &(mac->addr[ETHER_ADDR_LEN]), 3246 &(mac->mask[ETHER_ADDR_LEN])); /* src */ 3247 return cmd; 3248 } 3249 3250 static ipfw_insn * 3251 add_mactype(ipfw_insn *cmd, char *av, int cblen) 3252 { 3253 if (!av) 3254 errx(EX_DATAERR, "missing MAC type"); 3255 if (strcmp(av, "any") != 0) { /* we have a non-null type */ 3256 fill_newports((ipfw_insn_u16 *)cmd, av, IPPROTO_ETHERTYPE, 3257 cblen); 3258 cmd->opcode = O_MAC_TYPE; 3259 return cmd; 3260 } else 3261 return NULL; 3262 } 3263 3264 static ipfw_insn * 3265 add_proto0(ipfw_insn *cmd, char *av, u_char *protop) 3266 { 3267 struct protoent *pe; 3268 char *ep; 3269 int proto; 3270 3271 proto = strtol(av, &ep, 10); 3272 if (*ep != '\0' || proto <= 0) { 3273 if ((pe = getprotobyname(av)) == NULL) 3274 return NULL; 3275 proto = pe->p_proto; 3276 } 3277 3278 fill_cmd(cmd, O_PROTO, 0, proto); 3279 *protop = proto; 3280 return cmd; 3281 } 3282 3283 static ipfw_insn * 3284 add_proto(ipfw_insn *cmd, char *av, u_char *protop) 3285 { 3286 u_char proto = IPPROTO_IP; 3287 3288 if (_substrcmp(av, "all") == 0 || strcmp(av, "ip") == 0) 3289 ; /* do not set O_IP4 nor O_IP6 */ 3290 else if (strcmp(av, "ip4") == 0) 3291 /* explicit "just IPv4" rule */ 3292 fill_cmd(cmd, O_IP4, 0, 0); 3293 else if (strcmp(av, "ip6") == 0) { 3294 /* explicit "just IPv6" rule */ 3295 proto = IPPROTO_IPV6; 3296 fill_cmd(cmd, O_IP6, 0, 0); 3297 } else 3298 return add_proto0(cmd, av, protop); 3299 3300 *protop = proto; 3301 return cmd; 3302 } 3303 3304 static ipfw_insn * 3305 add_proto_compat(ipfw_insn *cmd, char *av, u_char *protop) 3306 { 3307 u_char proto = IPPROTO_IP; 3308 3309 if (_substrcmp(av, "all") == 0 || strcmp(av, "ip") == 0) 3310 ; /* do not set O_IP4 nor O_IP6 */ 3311 else if (strcmp(av, "ipv4") == 0 || strcmp(av, "ip4") == 0) 3312 /* explicit "just IPv4" rule */ 3313 fill_cmd(cmd, O_IP4, 0, 0); 3314 else if (strcmp(av, "ipv6") == 0 || strcmp(av, "ip6") == 0) { 3315 /* explicit "just IPv6" rule */ 3316 proto = IPPROTO_IPV6; 3317 fill_cmd(cmd, O_IP6, 0, 0); 3318 } else 3319 return add_proto0(cmd, av, protop); 3320 3321 *protop = proto; 3322 return cmd; 3323 } 3324 3325 static ipfw_insn * 3326 add_srcip(ipfw_insn *cmd, char *av, int cblen, struct tidx *tstate) 3327 { 3328 fill_ip((ipfw_insn_ip *)cmd, av, cblen, tstate); 3329 if (cmd->opcode == O_IP_DST_SET) /* set */ 3330 cmd->opcode = O_IP_SRC_SET; 3331 else if (cmd->opcode == O_IP_DST_LOOKUP) /* table */ 3332 cmd->opcode = O_IP_SRC_LOOKUP; 3333 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn)) /* me */ 3334 cmd->opcode = O_IP_SRC_ME; 3335 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_u32)) /* one IP */ 3336 cmd->opcode = O_IP_SRC; 3337 else /* addr/mask */ 3338 cmd->opcode = O_IP_SRC_MASK; 3339 return cmd; 3340 } 3341 3342 static ipfw_insn * 3343 add_dstip(ipfw_insn *cmd, char *av, int cblen, struct tidx *tstate) 3344 { 3345 fill_ip((ipfw_insn_ip *)cmd, av, cblen, tstate); 3346 if (cmd->opcode == O_IP_DST_SET) /* set */ 3347 ; 3348 else if (cmd->opcode == O_IP_DST_LOOKUP) /* table */ 3349 ; 3350 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn)) /* me */ 3351 cmd->opcode = O_IP_DST_ME; 3352 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_u32)) /* one IP */ 3353 cmd->opcode = O_IP_DST; 3354 else /* addr/mask */ 3355 cmd->opcode = O_IP_DST_MASK; 3356 return cmd; 3357 } 3358 3359 static struct _s_x f_reserved_keywords[] = { 3360 { "altq", TOK_OR }, 3361 { "//", TOK_OR }, 3362 { "diverted", TOK_OR }, 3363 { "dst-port", TOK_OR }, 3364 { "src-port", TOK_OR }, 3365 { "established", TOK_OR }, 3366 { "keep-state", TOK_OR }, 3367 { "frag", TOK_OR }, 3368 { "icmptypes", TOK_OR }, 3369 { "in", TOK_OR }, 3370 { "out", TOK_OR }, 3371 { "ip6", TOK_OR }, 3372 { "any", TOK_OR }, 3373 { "to", TOK_OR }, 3374 { "via", TOK_OR }, 3375 { "{", TOK_OR }, 3376 { NULL, 0 } /* terminator */ 3377 }; 3378 3379 static ipfw_insn * 3380 add_ports(ipfw_insn *cmd, char *av, u_char proto, int opcode, int cblen) 3381 { 3382 3383 if (match_token(f_reserved_keywords, av) != -1) 3384 return (NULL); 3385 3386 if (fill_newports((ipfw_insn_u16 *)cmd, av, proto, cblen)) { 3387 /* XXX todo: check that we have a protocol with ports */ 3388 cmd->opcode = opcode; 3389 return cmd; 3390 } 3391 return NULL; 3392 } 3393 3394 static ipfw_insn * 3395 add_src(ipfw_insn *cmd, char *av, u_char proto, int cblen, struct tidx *tstate) 3396 { 3397 struct in6_addr a; 3398 char *host, *ch, buf[INET6_ADDRSTRLEN]; 3399 ipfw_insn *ret = NULL; 3400 int len; 3401 3402 /* Copy first address in set if needed */ 3403 if ((ch = strpbrk(av, "/,")) != NULL) { 3404 len = ch - av; 3405 strlcpy(buf, av, sizeof(buf)); 3406 if (len < sizeof(buf)) 3407 buf[len] = '\0'; 3408 host = buf; 3409 } else 3410 host = av; 3411 3412 if (proto == IPPROTO_IPV6 || strcmp(av, "me6") == 0 || 3413 inet_pton(AF_INET6, host, &a) == 1) 3414 ret = add_srcip6(cmd, av, cblen); 3415 /* XXX: should check for IPv4, not !IPv6 */ 3416 if (ret == NULL && (proto == IPPROTO_IP || strcmp(av, "me") == 0 || 3417 inet_pton(AF_INET6, host, &a) != 1)) 3418 ret = add_srcip(cmd, av, cblen, tstate); 3419 if (ret == NULL && strcmp(av, "any") != 0) 3420 ret = cmd; 3421 3422 return ret; 3423 } 3424 3425 static ipfw_insn * 3426 add_dst(ipfw_insn *cmd, char *av, u_char proto, int cblen, struct tidx *tstate) 3427 { 3428 struct in6_addr a; 3429 char *host, *ch, buf[INET6_ADDRSTRLEN]; 3430 ipfw_insn *ret = NULL; 3431 int len; 3432 3433 /* Copy first address in set if needed */ 3434 if ((ch = strpbrk(av, "/,")) != NULL) { 3435 len = ch - av; 3436 strlcpy(buf, av, sizeof(buf)); 3437 if (len < sizeof(buf)) 3438 buf[len] = '\0'; 3439 host = buf; 3440 } else 3441 host = av; 3442 3443 if (proto == IPPROTO_IPV6 || strcmp(av, "me6") == 0 || 3444 inet_pton(AF_INET6, host, &a) == 1) 3445 ret = add_dstip6(cmd, av, cblen); 3446 /* XXX: should check for IPv4, not !IPv6 */ 3447 if (ret == NULL && (proto == IPPROTO_IP || strcmp(av, "me") == 0 || 3448 inet_pton(AF_INET6, host, &a) != 1)) 3449 ret = add_dstip(cmd, av, cblen, tstate); 3450 if (ret == NULL && strcmp(av, "any") != 0) 3451 ret = cmd; 3452 3453 return ret; 3454 } 3455 3456 /* 3457 * Parse arguments and assemble the microinstructions which make up a rule. 3458 * Rules are added into the 'rulebuf' and then copied in the correct order 3459 * into the actual rule. 3460 * 3461 * The syntax for a rule starts with the action, followed by 3462 * optional action parameters, and the various match patterns. 3463 * In the assembled microcode, the first opcode must be an O_PROBE_STATE 3464 * (generated if the rule includes a keep-state option), then the 3465 * various match patterns, log/altq actions, and the actual action. 3466 * 3467 */ 3468 void 3469 compile_rule(char *av[], uint32_t *rbuf, int *rbufsize, struct tidx *tstate) 3470 { 3471 /* 3472 * rules are added into the 'rulebuf' and then copied in 3473 * the correct order into the actual rule. 3474 * Some things that need to go out of order (prob, action etc.) 3475 * go into actbuf[]. 3476 */ 3477 static uint32_t actbuf[255], cmdbuf[255]; 3478 int rblen, ablen, cblen; 3479 3480 ipfw_insn *src, *dst, *cmd, *action, *prev=NULL; 3481 ipfw_insn *first_cmd; /* first match pattern */ 3482 3483 struct ip_fw_rule *rule; 3484 3485 /* 3486 * various flags used to record that we entered some fields. 3487 */ 3488 ipfw_insn *have_state = NULL; /* check-state or keep-state */ 3489 ipfw_insn *have_log = NULL, *have_altq = NULL, *have_tag = NULL; 3490 size_t len; 3491 3492 int i; 3493 3494 int open_par = 0; /* open parenthesis ( */ 3495 3496 /* proto is here because it is used to fetch ports */ 3497 u_char proto = IPPROTO_IP; /* default protocol */ 3498 3499 double match_prob = 1; /* match probability, default is always match */ 3500 3501 bzero(actbuf, sizeof(actbuf)); /* actions go here */ 3502 bzero(cmdbuf, sizeof(cmdbuf)); 3503 bzero(rbuf, *rbufsize); 3504 3505 rule = (struct ip_fw_rule *)rbuf; 3506 cmd = (ipfw_insn *)cmdbuf; 3507 action = (ipfw_insn *)actbuf; 3508 3509 rblen = *rbufsize / sizeof(uint32_t); 3510 rblen -= sizeof(struct ip_fw_rule) / sizeof(uint32_t); 3511 ablen = sizeof(actbuf) / sizeof(actbuf[0]); 3512 cblen = sizeof(cmdbuf) / sizeof(cmdbuf[0]); 3513 cblen -= F_INSN_SIZE(ipfw_insn_u32) + 1; 3514 3515 #define CHECK_RBUFLEN(len) { CHECK_LENGTH(rblen, len); rblen -= len; } 3516 #define CHECK_ACTLEN CHECK_LENGTH(ablen, action->len) 3517 3518 av++; 3519 3520 /* [rule N] -- Rule number optional */ 3521 if (av[0] && isdigit(**av)) { 3522 rule->rulenum = atoi(*av); 3523 av++; 3524 } 3525 3526 /* [set N] -- set number (0..RESVD_SET), optional */ 3527 if (av[0] && av[1] && _substrcmp(*av, "set") == 0) { 3528 int set = strtoul(av[1], NULL, 10); 3529 if (set < 0 || set > RESVD_SET) 3530 errx(EX_DATAERR, "illegal set %s", av[1]); 3531 rule->set = set; 3532 tstate->set = set; 3533 av += 2; 3534 } 3535 3536 /* [prob D] -- match probability, optional */ 3537 if (av[0] && av[1] && _substrcmp(*av, "prob") == 0) { 3538 match_prob = strtod(av[1], NULL); 3539 3540 if (match_prob <= 0 || match_prob > 1) 3541 errx(EX_DATAERR, "illegal match prob. %s", av[1]); 3542 av += 2; 3543 } 3544 3545 /* action -- mandatory */ 3546 NEED1("missing action"); 3547 i = match_token(rule_actions, *av); 3548 av++; 3549 action->len = 1; /* default */ 3550 CHECK_ACTLEN; 3551 switch(i) { 3552 case TOK_CHECKSTATE: 3553 have_state = action; 3554 action->opcode = O_CHECK_STATE; 3555 break; 3556 3557 case TOK_ACCEPT: 3558 action->opcode = O_ACCEPT; 3559 break; 3560 3561 case TOK_DENY: 3562 action->opcode = O_DENY; 3563 action->arg1 = 0; 3564 break; 3565 3566 case TOK_REJECT: 3567 action->opcode = O_REJECT; 3568 action->arg1 = ICMP_UNREACH_HOST; 3569 break; 3570 3571 case TOK_RESET: 3572 action->opcode = O_REJECT; 3573 action->arg1 = ICMP_REJECT_RST; 3574 break; 3575 3576 case TOK_RESET6: 3577 action->opcode = O_UNREACH6; 3578 action->arg1 = ICMP6_UNREACH_RST; 3579 break; 3580 3581 case TOK_UNREACH: 3582 action->opcode = O_REJECT; 3583 NEED1("missing reject code"); 3584 fill_reject_code(&action->arg1, *av); 3585 av++; 3586 break; 3587 3588 case TOK_UNREACH6: 3589 action->opcode = O_UNREACH6; 3590 NEED1("missing unreach code"); 3591 fill_unreach6_code(&action->arg1, *av); 3592 av++; 3593 break; 3594 3595 case TOK_COUNT: 3596 action->opcode = O_COUNT; 3597 break; 3598 3599 case TOK_NAT: 3600 action->opcode = O_NAT; 3601 action->len = F_INSN_SIZE(ipfw_insn_nat); 3602 CHECK_ACTLEN; 3603 if (_substrcmp(*av, "global") == 0) { 3604 action->arg1 = 0; 3605 av++; 3606 break; 3607 } else 3608 goto chkarg; 3609 3610 case TOK_QUEUE: 3611 action->opcode = O_QUEUE; 3612 goto chkarg; 3613 case TOK_PIPE: 3614 action->opcode = O_PIPE; 3615 goto chkarg; 3616 case TOK_SKIPTO: 3617 action->opcode = O_SKIPTO; 3618 goto chkarg; 3619 case TOK_NETGRAPH: 3620 action->opcode = O_NETGRAPH; 3621 goto chkarg; 3622 case TOK_NGTEE: 3623 action->opcode = O_NGTEE; 3624 goto chkarg; 3625 case TOK_DIVERT: 3626 action->opcode = O_DIVERT; 3627 goto chkarg; 3628 case TOK_TEE: 3629 action->opcode = O_TEE; 3630 goto chkarg; 3631 case TOK_CALL: 3632 action->opcode = O_CALLRETURN; 3633 chkarg: 3634 if (!av[0]) 3635 errx(EX_USAGE, "missing argument for %s", *(av - 1)); 3636 if (isdigit(**av)) { 3637 action->arg1 = strtoul(*av, NULL, 10); 3638 if (action->arg1 <= 0 || action->arg1 >= IP_FW_TABLEARG) 3639 errx(EX_DATAERR, "illegal argument for %s", 3640 *(av - 1)); 3641 } else if (_substrcmp(*av, "tablearg") == 0) { 3642 action->arg1 = IP_FW_TARG; 3643 } else if (i == TOK_DIVERT || i == TOK_TEE) { 3644 struct servent *s; 3645 setservent(1); 3646 s = getservbyname(av[0], "divert"); 3647 if (s != NULL) 3648 action->arg1 = ntohs(s->s_port); 3649 else 3650 errx(EX_DATAERR, "illegal divert/tee port"); 3651 } else 3652 errx(EX_DATAERR, "illegal argument for %s", *(av - 1)); 3653 av++; 3654 break; 3655 3656 case TOK_FORWARD: { 3657 /* 3658 * Locate the address-port separator (':' or ','). 3659 * Could be one of the following: 3660 * hostname:port 3661 * IPv4 a.b.c.d,port 3662 * IPv4 a.b.c.d:port 3663 * IPv6 w:x:y::z,port 3664 * The ':' can only be used with hostname and IPv4 address. 3665 * XXX-BZ Should we also support [w:x:y::z]:port? 3666 */ 3667 struct sockaddr_storage result; 3668 struct addrinfo *res; 3669 char *s, *end; 3670 int family; 3671 u_short port_number; 3672 3673 NEED1("missing forward address[:port]"); 3674 3675 /* 3676 * locate the address-port separator (':' or ',') 3677 */ 3678 s = strchr(*av, ','); 3679 if (s == NULL) { 3680 /* Distinguish between IPv4:port and IPv6 cases. */ 3681 s = strchr(*av, ':'); 3682 if (s && strchr(s+1, ':')) 3683 s = NULL; /* no port */ 3684 } 3685 3686 port_number = 0; 3687 if (s != NULL) { 3688 /* Terminate host portion and set s to start of port. */ 3689 *(s++) = '\0'; 3690 i = strtoport(s, &end, 0 /* base */, 0 /* proto */); 3691 if (s == end) 3692 errx(EX_DATAERR, 3693 "illegal forwarding port ``%s''", s); 3694 port_number = (u_short)i; 3695 } 3696 3697 if (_substrcmp(*av, "tablearg") == 0) { 3698 family = PF_INET; 3699 ((struct sockaddr_in*)&result)->sin_addr.s_addr = 3700 INADDR_ANY; 3701 } else { 3702 /* 3703 * Resolve the host name or address to a family and a 3704 * network representation of the address. 3705 */ 3706 if (getaddrinfo(*av, NULL, NULL, &res)) 3707 errx(EX_DATAERR, NULL); 3708 /* Just use the first host in the answer. */ 3709 family = res->ai_family; 3710 memcpy(&result, res->ai_addr, res->ai_addrlen); 3711 freeaddrinfo(res); 3712 } 3713 3714 if (family == PF_INET) { 3715 ipfw_insn_sa *p = (ipfw_insn_sa *)action; 3716 3717 action->opcode = O_FORWARD_IP; 3718 action->len = F_INSN_SIZE(ipfw_insn_sa); 3719 CHECK_ACTLEN; 3720 3721 /* 3722 * In the kernel we assume AF_INET and use only 3723 * sin_port and sin_addr. Remember to set sin_len as 3724 * the routing code seems to use it too. 3725 */ 3726 p->sa.sin_len = sizeof(struct sockaddr_in); 3727 p->sa.sin_family = AF_INET; 3728 p->sa.sin_port = port_number; 3729 p->sa.sin_addr.s_addr = 3730 ((struct sockaddr_in *)&result)->sin_addr.s_addr; 3731 } else if (family == PF_INET6) { 3732 ipfw_insn_sa6 *p = (ipfw_insn_sa6 *)action; 3733 3734 action->opcode = O_FORWARD_IP6; 3735 action->len = F_INSN_SIZE(ipfw_insn_sa6); 3736 CHECK_ACTLEN; 3737 3738 p->sa.sin6_len = sizeof(struct sockaddr_in6); 3739 p->sa.sin6_family = AF_INET6; 3740 p->sa.sin6_port = port_number; 3741 p->sa.sin6_flowinfo = 0; 3742 p->sa.sin6_scope_id = 0; 3743 /* No table support for v6 yet. */ 3744 bcopy(&((struct sockaddr_in6*)&result)->sin6_addr, 3745 &p->sa.sin6_addr, sizeof(p->sa.sin6_addr)); 3746 } else { 3747 errx(EX_DATAERR, "Invalid address family in forward action"); 3748 } 3749 av++; 3750 break; 3751 } 3752 case TOK_COMMENT: 3753 /* pretend it is a 'count' rule followed by the comment */ 3754 action->opcode = O_COUNT; 3755 av--; /* go back... */ 3756 break; 3757 3758 case TOK_SETFIB: 3759 { 3760 int numfibs; 3761 size_t intsize = sizeof(int); 3762 3763 action->opcode = O_SETFIB; 3764 NEED1("missing fib number"); 3765 if (_substrcmp(*av, "tablearg") == 0) { 3766 action->arg1 = IP_FW_TARG; 3767 } else { 3768 action->arg1 = strtoul(*av, NULL, 10); 3769 if (sysctlbyname("net.fibs", &numfibs, &intsize, 3770 NULL, 0) == -1) 3771 errx(EX_DATAERR, "fibs not suported.\n"); 3772 if (action->arg1 >= numfibs) /* Temporary */ 3773 errx(EX_DATAERR, "fib too large.\n"); 3774 /* Add high-order bit to fib to make room for tablearg*/ 3775 action->arg1 |= 0x8000; 3776 } 3777 av++; 3778 break; 3779 } 3780 3781 case TOK_SETDSCP: 3782 { 3783 int code; 3784 3785 action->opcode = O_SETDSCP; 3786 NEED1("missing DSCP code"); 3787 if (_substrcmp(*av, "tablearg") == 0) { 3788 action->arg1 = IP_FW_TARG; 3789 } else if (isalpha(*av[0])) { 3790 if ((code = match_token(f_ipdscp, *av)) == -1) 3791 errx(EX_DATAERR, "Unknown DSCP code"); 3792 action->arg1 = code; 3793 } else 3794 action->arg1 = strtoul(*av, NULL, 10); 3795 /* Add high-order bit to DSCP to make room for tablearg */ 3796 if (action->arg1 != IP_FW_TARG) 3797 action->arg1 |= 0x8000; 3798 av++; 3799 break; 3800 } 3801 3802 case TOK_REASS: 3803 action->opcode = O_REASS; 3804 break; 3805 3806 case TOK_RETURN: 3807 fill_cmd(action, O_CALLRETURN, F_NOT, 0); 3808 break; 3809 3810 default: 3811 errx(EX_DATAERR, "invalid action %s\n", av[-1]); 3812 } 3813 action = next_cmd(action, &ablen); 3814 3815 /* 3816 * [altq queuename] -- altq tag, optional 3817 * [log [logamount N]] -- log, optional 3818 * 3819 * If they exist, it go first in the cmdbuf, but then it is 3820 * skipped in the copy section to the end of the buffer. 3821 */ 3822 while (av[0] != NULL && (i = match_token(rule_action_params, *av)) != -1) { 3823 av++; 3824 switch (i) { 3825 case TOK_LOG: 3826 { 3827 ipfw_insn_log *c = (ipfw_insn_log *)cmd; 3828 int l; 3829 3830 if (have_log) 3831 errx(EX_DATAERR, 3832 "log cannot be specified more than once"); 3833 have_log = (ipfw_insn *)c; 3834 cmd->len = F_INSN_SIZE(ipfw_insn_log); 3835 CHECK_CMDLEN; 3836 cmd->opcode = O_LOG; 3837 if (av[0] && _substrcmp(*av, "logamount") == 0) { 3838 av++; 3839 NEED1("logamount requires argument"); 3840 l = atoi(*av); 3841 if (l < 0) 3842 errx(EX_DATAERR, 3843 "logamount must be positive"); 3844 c->max_log = l; 3845 av++; 3846 } else { 3847 len = sizeof(c->max_log); 3848 if (sysctlbyname("net.inet.ip.fw.verbose_limit", 3849 &c->max_log, &len, NULL, 0) == -1) { 3850 if (co.test_only) { 3851 c->max_log = 0; 3852 break; 3853 } 3854 errx(1, "sysctlbyname(\"%s\")", 3855 "net.inet.ip.fw.verbose_limit"); 3856 } 3857 } 3858 } 3859 break; 3860 3861 #ifndef NO_ALTQ 3862 case TOK_ALTQ: 3863 { 3864 ipfw_insn_altq *a = (ipfw_insn_altq *)cmd; 3865 3866 NEED1("missing altq queue name"); 3867 if (have_altq) 3868 errx(EX_DATAERR, 3869 "altq cannot be specified more than once"); 3870 have_altq = (ipfw_insn *)a; 3871 cmd->len = F_INSN_SIZE(ipfw_insn_altq); 3872 CHECK_CMDLEN; 3873 cmd->opcode = O_ALTQ; 3874 a->qid = altq_name_to_qid(*av); 3875 av++; 3876 } 3877 break; 3878 #endif 3879 3880 case TOK_TAG: 3881 case TOK_UNTAG: { 3882 uint16_t tag; 3883 3884 if (have_tag) 3885 errx(EX_USAGE, "tag and untag cannot be " 3886 "specified more than once"); 3887 GET_UINT_ARG(tag, IPFW_ARG_MIN, IPFW_ARG_MAX, i, 3888 rule_action_params); 3889 have_tag = cmd; 3890 fill_cmd(cmd, O_TAG, (i == TOK_TAG) ? 0: F_NOT, tag); 3891 av++; 3892 break; 3893 } 3894 3895 default: 3896 abort(); 3897 } 3898 cmd = next_cmd(cmd, &cblen); 3899 } 3900 3901 if (have_state) /* must be a check-state, we are done */ 3902 goto done; 3903 3904 #define OR_START(target) \ 3905 if (av[0] && (*av[0] == '(' || *av[0] == '{')) { \ 3906 if (open_par) \ 3907 errx(EX_USAGE, "nested \"(\" not allowed\n"); \ 3908 prev = NULL; \ 3909 open_par = 1; \ 3910 if ( (av[0])[1] == '\0') { \ 3911 av++; \ 3912 } else \ 3913 (*av)++; \ 3914 } \ 3915 target: \ 3916 3917 3918 #define CLOSE_PAR \ 3919 if (open_par) { \ 3920 if (av[0] && ( \ 3921 strcmp(*av, ")") == 0 || \ 3922 strcmp(*av, "}") == 0)) { \ 3923 prev = NULL; \ 3924 open_par = 0; \ 3925 av++; \ 3926 } else \ 3927 errx(EX_USAGE, "missing \")\"\n"); \ 3928 } 3929 3930 #define NOT_BLOCK \ 3931 if (av[0] && _substrcmp(*av, "not") == 0) { \ 3932 if (cmd->len & F_NOT) \ 3933 errx(EX_USAGE, "double \"not\" not allowed\n"); \ 3934 cmd->len |= F_NOT; \ 3935 av++; \ 3936 } 3937 3938 #define OR_BLOCK(target) \ 3939 if (av[0] && _substrcmp(*av, "or") == 0) { \ 3940 if (prev == NULL || open_par == 0) \ 3941 errx(EX_DATAERR, "invalid OR block"); \ 3942 prev->len |= F_OR; \ 3943 av++; \ 3944 goto target; \ 3945 } \ 3946 CLOSE_PAR; 3947 3948 first_cmd = cmd; 3949 3950 #if 0 3951 /* 3952 * MAC addresses, optional. 3953 * If we have this, we skip the part "proto from src to dst" 3954 * and jump straight to the option parsing. 3955 */ 3956 NOT_BLOCK; 3957 NEED1("missing protocol"); 3958 if (_substrcmp(*av, "MAC") == 0 || 3959 _substrcmp(*av, "mac") == 0) { 3960 av++; /* the "MAC" keyword */ 3961 add_mac(cmd, av); /* exits in case of errors */ 3962 cmd = next_cmd(cmd); 3963 av += 2; /* dst-mac and src-mac */ 3964 NOT_BLOCK; 3965 NEED1("missing mac type"); 3966 if (add_mactype(cmd, av[0])) 3967 cmd = next_cmd(cmd); 3968 av++; /* any or mac-type */ 3969 goto read_options; 3970 } 3971 #endif 3972 3973 /* 3974 * protocol, mandatory 3975 */ 3976 OR_START(get_proto); 3977 NOT_BLOCK; 3978 NEED1("missing protocol"); 3979 if (add_proto_compat(cmd, *av, &proto)) { 3980 av++; 3981 if (F_LEN(cmd) != 0) { 3982 prev = cmd; 3983 cmd = next_cmd(cmd, &cblen); 3984 } 3985 } else if (first_cmd != cmd) { 3986 errx(EX_DATAERR, "invalid protocol ``%s''", *av); 3987 } else 3988 goto read_options; 3989 OR_BLOCK(get_proto); 3990 3991 /* 3992 * "from", mandatory 3993 */ 3994 if ((av[0] == NULL) || _substrcmp(*av, "from") != 0) 3995 errx(EX_USAGE, "missing ``from''"); 3996 av++; 3997 3998 /* 3999 * source IP, mandatory 4000 */ 4001 OR_START(source_ip); 4002 NOT_BLOCK; /* optional "not" */ 4003 NEED1("missing source address"); 4004 if (add_src(cmd, *av, proto, cblen, tstate)) { 4005 av++; 4006 if (F_LEN(cmd) != 0) { /* ! any */ 4007 prev = cmd; 4008 cmd = next_cmd(cmd, &cblen); 4009 } 4010 } else 4011 errx(EX_USAGE, "bad source address %s", *av); 4012 OR_BLOCK(source_ip); 4013 4014 /* 4015 * source ports, optional 4016 */ 4017 NOT_BLOCK; /* optional "not" */ 4018 if ( av[0] != NULL ) { 4019 if (_substrcmp(*av, "any") == 0 || 4020 add_ports(cmd, *av, proto, O_IP_SRCPORT, cblen)) { 4021 av++; 4022 if (F_LEN(cmd) != 0) 4023 cmd = next_cmd(cmd, &cblen); 4024 } 4025 } 4026 4027 /* 4028 * "to", mandatory 4029 */ 4030 if ( (av[0] == NULL) || _substrcmp(*av, "to") != 0 ) 4031 errx(EX_USAGE, "missing ``to''"); 4032 av++; 4033 4034 /* 4035 * destination, mandatory 4036 */ 4037 OR_START(dest_ip); 4038 NOT_BLOCK; /* optional "not" */ 4039 NEED1("missing dst address"); 4040 if (add_dst(cmd, *av, proto, cblen, tstate)) { 4041 av++; 4042 if (F_LEN(cmd) != 0) { /* ! any */ 4043 prev = cmd; 4044 cmd = next_cmd(cmd, &cblen); 4045 } 4046 } else 4047 errx( EX_USAGE, "bad destination address %s", *av); 4048 OR_BLOCK(dest_ip); 4049 4050 /* 4051 * dest. ports, optional 4052 */ 4053 NOT_BLOCK; /* optional "not" */ 4054 if (av[0]) { 4055 if (_substrcmp(*av, "any") == 0 || 4056 add_ports(cmd, *av, proto, O_IP_DSTPORT, cblen)) { 4057 av++; 4058 if (F_LEN(cmd) != 0) 4059 cmd = next_cmd(cmd, &cblen); 4060 } 4061 } 4062 4063 read_options: 4064 if (av[0] && first_cmd == cmd) { 4065 /* 4066 * nothing specified so far, store in the rule to ease 4067 * printout later. 4068 */ 4069 rule->flags |= IPFW_RULE_NOOPT; 4070 } 4071 prev = NULL; 4072 while ( av[0] != NULL ) { 4073 char *s; 4074 ipfw_insn_u32 *cmd32; /* alias for cmd */ 4075 4076 s = *av; 4077 cmd32 = (ipfw_insn_u32 *)cmd; 4078 4079 if (*s == '!') { /* alternate syntax for NOT */ 4080 if (cmd->len & F_NOT) 4081 errx(EX_USAGE, "double \"not\" not allowed\n"); 4082 cmd->len = F_NOT; 4083 s++; 4084 } 4085 i = match_token(rule_options, s); 4086 av++; 4087 switch(i) { 4088 case TOK_NOT: 4089 if (cmd->len & F_NOT) 4090 errx(EX_USAGE, "double \"not\" not allowed\n"); 4091 cmd->len = F_NOT; 4092 break; 4093 4094 case TOK_OR: 4095 if (open_par == 0 || prev == NULL) 4096 errx(EX_USAGE, "invalid \"or\" block\n"); 4097 prev->len |= F_OR; 4098 break; 4099 4100 case TOK_STARTBRACE: 4101 if (open_par) 4102 errx(EX_USAGE, "+nested \"(\" not allowed\n"); 4103 open_par = 1; 4104 break; 4105 4106 case TOK_ENDBRACE: 4107 if (!open_par) 4108 errx(EX_USAGE, "+missing \")\"\n"); 4109 open_par = 0; 4110 prev = NULL; 4111 break; 4112 4113 case TOK_IN: 4114 fill_cmd(cmd, O_IN, 0, 0); 4115 break; 4116 4117 case TOK_OUT: 4118 cmd->len ^= F_NOT; /* toggle F_NOT */ 4119 fill_cmd(cmd, O_IN, 0, 0); 4120 break; 4121 4122 case TOK_DIVERTED: 4123 fill_cmd(cmd, O_DIVERTED, 0, 3); 4124 break; 4125 4126 case TOK_DIVERTEDLOOPBACK: 4127 fill_cmd(cmd, O_DIVERTED, 0, 1); 4128 break; 4129 4130 case TOK_DIVERTEDOUTPUT: 4131 fill_cmd(cmd, O_DIVERTED, 0, 2); 4132 break; 4133 4134 case TOK_FRAG: 4135 fill_cmd(cmd, O_FRAG, 0, 0); 4136 break; 4137 4138 case TOK_LAYER2: 4139 fill_cmd(cmd, O_LAYER2, 0, 0); 4140 break; 4141 4142 case TOK_XMIT: 4143 case TOK_RECV: 4144 case TOK_VIA: 4145 NEED1("recv, xmit, via require interface name" 4146 " or address"); 4147 fill_iface((ipfw_insn_if *)cmd, av[0], cblen, tstate); 4148 av++; 4149 if (F_LEN(cmd) == 0) /* not a valid address */ 4150 break; 4151 if (i == TOK_XMIT) 4152 cmd->opcode = O_XMIT; 4153 else if (i == TOK_RECV) 4154 cmd->opcode = O_RECV; 4155 else if (i == TOK_VIA) 4156 cmd->opcode = O_VIA; 4157 break; 4158 4159 case TOK_ICMPTYPES: 4160 NEED1("icmptypes requires list of types"); 4161 fill_icmptypes((ipfw_insn_u32 *)cmd, *av); 4162 av++; 4163 break; 4164 4165 case TOK_ICMP6TYPES: 4166 NEED1("icmptypes requires list of types"); 4167 fill_icmp6types((ipfw_insn_icmp6 *)cmd, *av, cblen); 4168 av++; 4169 break; 4170 4171 case TOK_IPTTL: 4172 NEED1("ipttl requires TTL"); 4173 if (strpbrk(*av, "-,")) { 4174 if (!add_ports(cmd, *av, 0, O_IPTTL, cblen)) 4175 errx(EX_DATAERR, "invalid ipttl %s", *av); 4176 } else 4177 fill_cmd(cmd, O_IPTTL, 0, strtoul(*av, NULL, 0)); 4178 av++; 4179 break; 4180 4181 case TOK_IPID: 4182 NEED1("ipid requires id"); 4183 if (strpbrk(*av, "-,")) { 4184 if (!add_ports(cmd, *av, 0, O_IPID, cblen)) 4185 errx(EX_DATAERR, "invalid ipid %s", *av); 4186 } else 4187 fill_cmd(cmd, O_IPID, 0, strtoul(*av, NULL, 0)); 4188 av++; 4189 break; 4190 4191 case TOK_IPLEN: 4192 NEED1("iplen requires length"); 4193 if (strpbrk(*av, "-,")) { 4194 if (!add_ports(cmd, *av, 0, O_IPLEN, cblen)) 4195 errx(EX_DATAERR, "invalid ip len %s", *av); 4196 } else 4197 fill_cmd(cmd, O_IPLEN, 0, strtoul(*av, NULL, 0)); 4198 av++; 4199 break; 4200 4201 case TOK_IPVER: 4202 NEED1("ipver requires version"); 4203 fill_cmd(cmd, O_IPVER, 0, strtoul(*av, NULL, 0)); 4204 av++; 4205 break; 4206 4207 case TOK_IPPRECEDENCE: 4208 NEED1("ipprecedence requires value"); 4209 fill_cmd(cmd, O_IPPRECEDENCE, 0, 4210 (strtoul(*av, NULL, 0) & 7) << 5); 4211 av++; 4212 break; 4213 4214 case TOK_DSCP: 4215 NEED1("missing DSCP code"); 4216 fill_dscp(cmd, *av, cblen); 4217 av++; 4218 break; 4219 4220 case TOK_IPOPTS: 4221 NEED1("missing argument for ipoptions"); 4222 fill_flags_cmd(cmd, O_IPOPT, f_ipopts, *av); 4223 av++; 4224 break; 4225 4226 case TOK_IPTOS: 4227 NEED1("missing argument for iptos"); 4228 fill_flags_cmd(cmd, O_IPTOS, f_iptos, *av); 4229 av++; 4230 break; 4231 4232 case TOK_UID: 4233 NEED1("uid requires argument"); 4234 { 4235 char *end; 4236 uid_t uid; 4237 struct passwd *pwd; 4238 4239 cmd->opcode = O_UID; 4240 uid = strtoul(*av, &end, 0); 4241 pwd = (*end == '\0') ? getpwuid(uid) : getpwnam(*av); 4242 if (pwd == NULL) 4243 errx(EX_DATAERR, "uid \"%s\" nonexistent", *av); 4244 cmd32->d[0] = pwd->pw_uid; 4245 cmd->len |= F_INSN_SIZE(ipfw_insn_u32); 4246 av++; 4247 } 4248 break; 4249 4250 case TOK_GID: 4251 NEED1("gid requires argument"); 4252 { 4253 char *end; 4254 gid_t gid; 4255 struct group *grp; 4256 4257 cmd->opcode = O_GID; 4258 gid = strtoul(*av, &end, 0); 4259 grp = (*end == '\0') ? getgrgid(gid) : getgrnam(*av); 4260 if (grp == NULL) 4261 errx(EX_DATAERR, "gid \"%s\" nonexistent", *av); 4262 cmd32->d[0] = grp->gr_gid; 4263 cmd->len |= F_INSN_SIZE(ipfw_insn_u32); 4264 av++; 4265 } 4266 break; 4267 4268 case TOK_JAIL: 4269 NEED1("jail requires argument"); 4270 { 4271 char *end; 4272 int jid; 4273 4274 cmd->opcode = O_JAIL; 4275 jid = (int)strtol(*av, &end, 0); 4276 if (jid < 0 || *end != '\0') 4277 errx(EX_DATAERR, "jail requires prison ID"); 4278 cmd32->d[0] = (uint32_t)jid; 4279 cmd->len |= F_INSN_SIZE(ipfw_insn_u32); 4280 av++; 4281 } 4282 break; 4283 4284 case TOK_ESTAB: 4285 fill_cmd(cmd, O_ESTAB, 0, 0); 4286 break; 4287 4288 case TOK_SETUP: 4289 fill_cmd(cmd, O_TCPFLAGS, 0, 4290 (TH_SYN) | ( (TH_ACK) & 0xff) <<8 ); 4291 break; 4292 4293 case TOK_TCPDATALEN: 4294 NEED1("tcpdatalen requires length"); 4295 if (strpbrk(*av, "-,")) { 4296 if (!add_ports(cmd, *av, 0, O_TCPDATALEN, cblen)) 4297 errx(EX_DATAERR, "invalid tcpdata len %s", *av); 4298 } else 4299 fill_cmd(cmd, O_TCPDATALEN, 0, 4300 strtoul(*av, NULL, 0)); 4301 av++; 4302 break; 4303 4304 case TOK_TCPOPTS: 4305 NEED1("missing argument for tcpoptions"); 4306 fill_flags_cmd(cmd, O_TCPOPTS, f_tcpopts, *av); 4307 av++; 4308 break; 4309 4310 case TOK_TCPSEQ: 4311 case TOK_TCPACK: 4312 NEED1("tcpseq/tcpack requires argument"); 4313 cmd->len = F_INSN_SIZE(ipfw_insn_u32); 4314 cmd->opcode = (i == TOK_TCPSEQ) ? O_TCPSEQ : O_TCPACK; 4315 cmd32->d[0] = htonl(strtoul(*av, NULL, 0)); 4316 av++; 4317 break; 4318 4319 case TOK_TCPWIN: 4320 NEED1("tcpwin requires length"); 4321 if (strpbrk(*av, "-,")) { 4322 if (!add_ports(cmd, *av, 0, O_TCPWIN, cblen)) 4323 errx(EX_DATAERR, "invalid tcpwin len %s", *av); 4324 } else 4325 fill_cmd(cmd, O_TCPWIN, 0, 4326 strtoul(*av, NULL, 0)); 4327 av++; 4328 break; 4329 4330 case TOK_TCPFLAGS: 4331 NEED1("missing argument for tcpflags"); 4332 cmd->opcode = O_TCPFLAGS; 4333 fill_flags_cmd(cmd, O_TCPFLAGS, f_tcpflags, *av); 4334 av++; 4335 break; 4336 4337 case TOK_KEEPSTATE: 4338 if (open_par) 4339 errx(EX_USAGE, "keep-state cannot be part " 4340 "of an or block"); 4341 if (have_state) 4342 errx(EX_USAGE, "only one of keep-state " 4343 "and limit is allowed"); 4344 have_state = cmd; 4345 fill_cmd(cmd, O_KEEP_STATE, 0, 0); 4346 break; 4347 4348 case TOK_LIMIT: { 4349 ipfw_insn_limit *c = (ipfw_insn_limit *)cmd; 4350 int val; 4351 4352 if (open_par) 4353 errx(EX_USAGE, 4354 "limit cannot be part of an or block"); 4355 if (have_state) 4356 errx(EX_USAGE, "only one of keep-state and " 4357 "limit is allowed"); 4358 have_state = cmd; 4359 4360 cmd->len = F_INSN_SIZE(ipfw_insn_limit); 4361 CHECK_CMDLEN; 4362 cmd->opcode = O_LIMIT; 4363 c->limit_mask = c->conn_limit = 0; 4364 4365 while ( av[0] != NULL ) { 4366 if ((val = match_token(limit_masks, *av)) <= 0) 4367 break; 4368 c->limit_mask |= val; 4369 av++; 4370 } 4371 4372 if (c->limit_mask == 0) 4373 errx(EX_USAGE, "limit: missing limit mask"); 4374 4375 GET_UINT_ARG(c->conn_limit, IPFW_ARG_MIN, IPFW_ARG_MAX, 4376 TOK_LIMIT, rule_options); 4377 4378 av++; 4379 break; 4380 } 4381 4382 case TOK_PROTO: 4383 NEED1("missing protocol"); 4384 if (add_proto(cmd, *av, &proto)) { 4385 av++; 4386 } else 4387 errx(EX_DATAERR, "invalid protocol ``%s''", 4388 *av); 4389 break; 4390 4391 case TOK_SRCIP: 4392 NEED1("missing source IP"); 4393 if (add_srcip(cmd, *av, cblen, tstate)) { 4394 av++; 4395 } 4396 break; 4397 4398 case TOK_DSTIP: 4399 NEED1("missing destination IP"); 4400 if (add_dstip(cmd, *av, cblen, tstate)) { 4401 av++; 4402 } 4403 break; 4404 4405 case TOK_SRCIP6: 4406 NEED1("missing source IP6"); 4407 if (add_srcip6(cmd, *av, cblen)) { 4408 av++; 4409 } 4410 break; 4411 4412 case TOK_DSTIP6: 4413 NEED1("missing destination IP6"); 4414 if (add_dstip6(cmd, *av, cblen)) { 4415 av++; 4416 } 4417 break; 4418 4419 case TOK_SRCPORT: 4420 NEED1("missing source port"); 4421 if (_substrcmp(*av, "any") == 0 || 4422 add_ports(cmd, *av, proto, O_IP_SRCPORT, cblen)) { 4423 av++; 4424 } else 4425 errx(EX_DATAERR, "invalid source port %s", *av); 4426 break; 4427 4428 case TOK_DSTPORT: 4429 NEED1("missing destination port"); 4430 if (_substrcmp(*av, "any") == 0 || 4431 add_ports(cmd, *av, proto, O_IP_DSTPORT, cblen)) { 4432 av++; 4433 } else 4434 errx(EX_DATAERR, "invalid destination port %s", 4435 *av); 4436 break; 4437 4438 case TOK_MAC: 4439 if (add_mac(cmd, av, cblen)) 4440 av += 2; 4441 break; 4442 4443 case TOK_MACTYPE: 4444 NEED1("missing mac type"); 4445 if (!add_mactype(cmd, *av, cblen)) 4446 errx(EX_DATAERR, "invalid mac type %s", *av); 4447 av++; 4448 break; 4449 4450 case TOK_VERREVPATH: 4451 fill_cmd(cmd, O_VERREVPATH, 0, 0); 4452 break; 4453 4454 case TOK_VERSRCREACH: 4455 fill_cmd(cmd, O_VERSRCREACH, 0, 0); 4456 break; 4457 4458 case TOK_ANTISPOOF: 4459 fill_cmd(cmd, O_ANTISPOOF, 0, 0); 4460 break; 4461 4462 case TOK_IPSEC: 4463 fill_cmd(cmd, O_IPSEC, 0, 0); 4464 break; 4465 4466 case TOK_IPV6: 4467 fill_cmd(cmd, O_IP6, 0, 0); 4468 break; 4469 4470 case TOK_IPV4: 4471 fill_cmd(cmd, O_IP4, 0, 0); 4472 break; 4473 4474 case TOK_EXT6HDR: 4475 fill_ext6hdr( cmd, *av ); 4476 av++; 4477 break; 4478 4479 case TOK_FLOWID: 4480 if (proto != IPPROTO_IPV6 ) 4481 errx( EX_USAGE, "flow-id filter is active " 4482 "only for ipv6 protocol\n"); 4483 fill_flow6( (ipfw_insn_u32 *) cmd, *av, cblen); 4484 av++; 4485 break; 4486 4487 case TOK_COMMENT: 4488 fill_comment(cmd, av, cblen); 4489 av[0]=NULL; 4490 break; 4491 4492 case TOK_TAGGED: 4493 if (av[0] && strpbrk(*av, "-,")) { 4494 if (!add_ports(cmd, *av, 0, O_TAGGED, cblen)) 4495 errx(EX_DATAERR, "tagged: invalid tag" 4496 " list: %s", *av); 4497 } 4498 else { 4499 uint16_t tag; 4500 4501 GET_UINT_ARG(tag, IPFW_ARG_MIN, IPFW_ARG_MAX, 4502 TOK_TAGGED, rule_options); 4503 fill_cmd(cmd, O_TAGGED, 0, tag); 4504 } 4505 av++; 4506 break; 4507 4508 case TOK_FIB: 4509 NEED1("fib requires fib number"); 4510 fill_cmd(cmd, O_FIB, 0, strtoul(*av, NULL, 0)); 4511 av++; 4512 break; 4513 case TOK_SOCKARG: 4514 fill_cmd(cmd, O_SOCKARG, 0, 0); 4515 break; 4516 4517 case TOK_LOOKUP: { 4518 ipfw_insn_u32 *c = (ipfw_insn_u32 *)cmd; 4519 int j; 4520 4521 if (!av[0] || !av[1]) 4522 errx(EX_USAGE, "format: lookup argument tablenum"); 4523 cmd->opcode = O_IP_DST_LOOKUP; 4524 cmd->len |= F_INSN_SIZE(ipfw_insn) + 2; 4525 i = match_token(rule_options, *av); 4526 for (j = 0; lookup_key[j] >= 0 ; j++) { 4527 if (i == lookup_key[j]) 4528 break; 4529 } 4530 if (lookup_key[j] <= 0) 4531 errx(EX_USAGE, "format: cannot lookup on %s", *av); 4532 __PAST_END(c->d, 1) = j; // i converted to option 4533 av++; 4534 4535 if ((j = pack_table(tstate, *av)) == 0) 4536 errx(EX_DATAERR, "Invalid table name: %s", *av); 4537 4538 cmd->arg1 = j; 4539 av++; 4540 } 4541 break; 4542 case TOK_FLOW: 4543 NEED1("missing table name"); 4544 if (strncmp(*av, "table(", 6) != 0) 4545 errx(EX_DATAERR, 4546 "enclose table name into \"table()\""); 4547 fill_table(cmd, *av, O_IP_FLOW_LOOKUP, tstate); 4548 av++; 4549 break; 4550 4551 default: 4552 errx(EX_USAGE, "unrecognised option [%d] %s\n", i, s); 4553 } 4554 if (F_LEN(cmd) > 0) { /* prepare to advance */ 4555 prev = cmd; 4556 cmd = next_cmd(cmd, &cblen); 4557 } 4558 } 4559 4560 done: 4561 /* 4562 * Now copy stuff into the rule. 4563 * If we have a keep-state option, the first instruction 4564 * must be a PROBE_STATE (which is generated here). 4565 * If we have a LOG option, it was stored as the first command, 4566 * and now must be moved to the top of the action part. 4567 */ 4568 dst = (ipfw_insn *)rule->cmd; 4569 4570 /* 4571 * First thing to write into the command stream is the match probability. 4572 */ 4573 if (match_prob != 1) { /* 1 means always match */ 4574 dst->opcode = O_PROB; 4575 dst->len = 2; 4576 *((int32_t *)(dst+1)) = (int32_t)(match_prob * 0x7fffffff); 4577 dst += dst->len; 4578 } 4579 4580 /* 4581 * generate O_PROBE_STATE if necessary 4582 */ 4583 if (have_state && have_state->opcode != O_CHECK_STATE) { 4584 fill_cmd(dst, O_PROBE_STATE, 0, 0); 4585 dst = next_cmd(dst, &rblen); 4586 } 4587 4588 /* copy all commands but O_LOG, O_KEEP_STATE, O_LIMIT, O_ALTQ, O_TAG */ 4589 for (src = (ipfw_insn *)cmdbuf; src != cmd; src += i) { 4590 i = F_LEN(src); 4591 CHECK_RBUFLEN(i); 4592 4593 switch (src->opcode) { 4594 case O_LOG: 4595 case O_KEEP_STATE: 4596 case O_LIMIT: 4597 case O_ALTQ: 4598 case O_TAG: 4599 break; 4600 default: 4601 bcopy(src, dst, i * sizeof(uint32_t)); 4602 dst += i; 4603 } 4604 } 4605 4606 /* 4607 * put back the have_state command as last opcode 4608 */ 4609 if (have_state && have_state->opcode != O_CHECK_STATE) { 4610 i = F_LEN(have_state); 4611 CHECK_RBUFLEN(i); 4612 bcopy(have_state, dst, i * sizeof(uint32_t)); 4613 dst += i; 4614 } 4615 /* 4616 * start action section 4617 */ 4618 rule->act_ofs = dst - rule->cmd; 4619 4620 /* put back O_LOG, O_ALTQ, O_TAG if necessary */ 4621 if (have_log) { 4622 i = F_LEN(have_log); 4623 CHECK_RBUFLEN(i); 4624 bcopy(have_log, dst, i * sizeof(uint32_t)); 4625 dst += i; 4626 } 4627 if (have_altq) { 4628 i = F_LEN(have_altq); 4629 CHECK_RBUFLEN(i); 4630 bcopy(have_altq, dst, i * sizeof(uint32_t)); 4631 dst += i; 4632 } 4633 if (have_tag) { 4634 i = F_LEN(have_tag); 4635 CHECK_RBUFLEN(i); 4636 bcopy(have_tag, dst, i * sizeof(uint32_t)); 4637 dst += i; 4638 } 4639 4640 /* 4641 * copy all other actions 4642 */ 4643 for (src = (ipfw_insn *)actbuf; src != action; src += i) { 4644 i = F_LEN(src); 4645 CHECK_RBUFLEN(i); 4646 bcopy(src, dst, i * sizeof(uint32_t)); 4647 dst += i; 4648 } 4649 4650 rule->cmd_len = (uint32_t *)dst - (uint32_t *)(rule->cmd); 4651 *rbufsize = (char *)dst - (char *)rule; 4652 } 4653 4654 /* 4655 * Adds one or more rules to ipfw chain. 4656 * Data layout: 4657 * Request: 4658 * [ 4659 * ip_fw3_opheader 4660 * [ ipfw_obj_ctlv(IPFW_TLV_TBL_LIST) ipfw_obj_ntlv x N ] (optional *1) 4661 * [ ipfw_obj_ctlv(IPFW_TLV_RULE_LIST) [ ip_fw_rule ip_fw_insn ] x N ] (*2) (*3) 4662 * ] 4663 * Reply: 4664 * [ 4665 * ip_fw3_opheader 4666 * [ ipfw_obj_ctlv(IPFW_TLV_TBL_LIST) ipfw_obj_ntlv x N ] (optional) 4667 * [ ipfw_obj_ctlv(IPFW_TLV_RULE_LIST) [ ip_fw_rule ip_fw_insn ] x N ] 4668 * ] 4669 * 4670 * Rules in reply are modified to store their actual ruleset number. 4671 * 4672 * (*1) TLVs inside IPFW_TLV_TBL_LIST needs to be sorted ascending 4673 * accoring to their idx field and there has to be no duplicates. 4674 * (*2) Numbered rules inside IPFW_TLV_RULE_LIST needs to be sorted ascending. 4675 * (*3) Each ip_fw structure needs to be aligned to u64 boundary. 4676 */ 4677 void 4678 ipfw_add(char *av[]) 4679 { 4680 uint32_t rulebuf[1024]; 4681 int rbufsize, default_off, tlen, rlen; 4682 size_t sz; 4683 struct tidx ts; 4684 struct ip_fw_rule *rule; 4685 caddr_t tbuf; 4686 ip_fw3_opheader *op3; 4687 ipfw_obj_ctlv *ctlv, *tstate; 4688 4689 rbufsize = sizeof(rulebuf); 4690 memset(rulebuf, 0, rbufsize); 4691 memset(&ts, 0, sizeof(ts)); 4692 4693 /* Optimize case with no tables */ 4694 default_off = sizeof(ipfw_obj_ctlv) + sizeof(ip_fw3_opheader); 4695 op3 = (ip_fw3_opheader *)rulebuf; 4696 ctlv = (ipfw_obj_ctlv *)(op3 + 1); 4697 rule = (struct ip_fw_rule *)(ctlv + 1); 4698 rbufsize -= default_off; 4699 4700 compile_rule(av, (uint32_t *)rule, &rbufsize, &ts); 4701 /* Align rule size to u64 boundary */ 4702 rlen = roundup2(rbufsize, sizeof(uint64_t)); 4703 4704 tbuf = NULL; 4705 sz = 0; 4706 tstate = NULL; 4707 if (ts.count != 0) { 4708 /* Some tables. We have to alloc more data */ 4709 tlen = ts.count * sizeof(ipfw_obj_ntlv); 4710 sz = default_off + sizeof(ipfw_obj_ctlv) + tlen + rlen; 4711 4712 if ((tbuf = calloc(1, sz)) == NULL) 4713 err(EX_UNAVAILABLE, "malloc() failed for IP_FW_ADD"); 4714 op3 = (ip_fw3_opheader *)tbuf; 4715 /* Tables first */ 4716 ctlv = (ipfw_obj_ctlv *)(op3 + 1); 4717 ctlv->head.type = IPFW_TLV_TBLNAME_LIST; 4718 ctlv->head.length = sizeof(ipfw_obj_ctlv) + tlen; 4719 ctlv->count = ts.count; 4720 ctlv->objsize = sizeof(ipfw_obj_ntlv); 4721 memcpy(ctlv + 1, ts.idx, tlen); 4722 table_sort_ctlv(ctlv); 4723 tstate = ctlv; 4724 /* Rule next */ 4725 ctlv = (ipfw_obj_ctlv *)((caddr_t)ctlv + ctlv->head.length); 4726 ctlv->head.type = IPFW_TLV_RULE_LIST; 4727 ctlv->head.length = sizeof(ipfw_obj_ctlv) + rlen; 4728 ctlv->count = 1; 4729 memcpy(ctlv + 1, rule, rbufsize); 4730 } else { 4731 /* Simply add header */ 4732 sz = rlen + default_off; 4733 memset(ctlv, 0, sizeof(*ctlv)); 4734 ctlv->head.type = IPFW_TLV_RULE_LIST; 4735 ctlv->head.length = sizeof(ipfw_obj_ctlv) + rlen; 4736 ctlv->count = 1; 4737 } 4738 4739 if (do_get3(IP_FW_XADD, op3, &sz) != 0) 4740 err(EX_UNAVAILABLE, "getsockopt(%s)", "IP_FW_XADD"); 4741 4742 if (!co.do_quiet) { 4743 struct format_opts sfo; 4744 struct buf_pr bp; 4745 memset(&sfo, 0, sizeof(sfo)); 4746 sfo.tstate = tstate; 4747 sfo.set_mask = (uint32_t)(-1); 4748 bp_alloc(&bp, 4096); 4749 show_static_rule(&co, &sfo, &bp, rule, NULL); 4750 printf("%s", bp.buf); 4751 bp_free(&bp); 4752 } 4753 4754 if (tbuf != NULL) 4755 free(tbuf); 4756 4757 if (ts.idx != NULL) 4758 free(ts.idx); 4759 } 4760 4761 /* 4762 * clear the counters or the log counters. 4763 * optname has the following values: 4764 * 0 (zero both counters and logging) 4765 * 1 (zero logging only) 4766 */ 4767 void 4768 ipfw_zero(int ac, char *av[], int optname) 4769 { 4770 ipfw_range_tlv rt; 4771 uint32_t arg; 4772 int failed = EX_OK; 4773 char const *errstr; 4774 char const *name = optname ? "RESETLOG" : "ZERO"; 4775 4776 optname = optname ? IP_FW_XRESETLOG : IP_FW_XZERO; 4777 memset(&rt, 0, sizeof(rt)); 4778 4779 av++; ac--; 4780 4781 if (ac == 0) { 4782 /* clear all entries */ 4783 rt.flags = IPFW_RCFLAG_ALL; 4784 if (do_range_cmd(optname, &rt) < 0) 4785 err(EX_UNAVAILABLE, "setsockopt(IP_FW_X%s)", name); 4786 if (!co.do_quiet) 4787 printf("%s.\n", optname == IP_FW_XZERO ? 4788 "Accounting cleared":"Logging counts reset"); 4789 4790 return; 4791 } 4792 4793 while (ac) { 4794 /* Rule number */ 4795 if (isdigit(**av)) { 4796 arg = strtonum(*av, 0, 0xffff, &errstr); 4797 if (errstr) 4798 errx(EX_DATAERR, 4799 "invalid rule number %s\n", *av); 4800 rt.start_rule = arg; 4801 rt.end_rule = arg; 4802 rt.flags |= IPFW_RCFLAG_RANGE; 4803 if (co.use_set != 0) { 4804 rt.set = co.use_set - 1; 4805 rt.flags |= IPFW_RCFLAG_SET; 4806 } 4807 if (do_range_cmd(optname, &rt) != 0) { 4808 warn("rule %u: setsockopt(IP_FW_X%s)", 4809 arg, name); 4810 failed = EX_UNAVAILABLE; 4811 } else if (rt.new_set == 0) { 4812 printf("Entry %d not found\n", arg); 4813 failed = EX_UNAVAILABLE; 4814 } else if (!co.do_quiet) 4815 printf("Entry %d %s.\n", arg, 4816 optname == IP_FW_XZERO ? 4817 "cleared" : "logging count reset"); 4818 } else { 4819 errx(EX_USAGE, "invalid rule number ``%s''", *av); 4820 } 4821 av++; ac--; 4822 } 4823 if (failed != EX_OK) 4824 exit(failed); 4825 } 4826 4827 void 4828 ipfw_flush(int force) 4829 { 4830 ipfw_range_tlv rt; 4831 4832 if (!force && !co.do_quiet) { /* need to ask user */ 4833 int c; 4834 4835 printf("Are you sure? [yn] "); 4836 fflush(stdout); 4837 do { 4838 c = toupper(getc(stdin)); 4839 while (c != '\n' && getc(stdin) != '\n') 4840 if (feof(stdin)) 4841 return; /* and do not flush */ 4842 } while (c != 'Y' && c != 'N'); 4843 printf("\n"); 4844 if (c == 'N') /* user said no */ 4845 return; 4846 } 4847 if (co.do_pipe) { 4848 dummynet_flush(); 4849 return; 4850 } 4851 /* `ipfw set N flush` - is the same that `ipfw delete set N` */ 4852 memset(&rt, 0, sizeof(rt)); 4853 if (co.use_set != 0) { 4854 rt.set = co.use_set - 1; 4855 rt.flags = IPFW_RCFLAG_SET; 4856 } else 4857 rt.flags = IPFW_RCFLAG_ALL; 4858 if (do_range_cmd(IP_FW_XDEL, &rt) != 0) 4859 err(EX_UNAVAILABLE, "setsockopt(IP_FW_XDEL)"); 4860 if (!co.do_quiet) 4861 printf("Flushed all %s.\n", co.do_pipe ? "pipes" : "rules"); 4862 } 4863 4864 static struct _s_x intcmds[] = { 4865 { "talist", TOK_TALIST }, 4866 { "iflist", TOK_IFLIST }, 4867 { "vlist", TOK_VLIST }, 4868 { NULL, 0 } 4869 }; 4870 4871 void 4872 ipfw_internal_handler(int ac, char *av[]) 4873 { 4874 int tcmd; 4875 4876 ac--; av++; 4877 NEED1("internal cmd required"); 4878 4879 if ((tcmd = match_token(intcmds, *av)) == -1) 4880 errx(EX_USAGE, "invalid internal sub-cmd: %s", *av); 4881 4882 switch (tcmd) { 4883 case TOK_IFLIST: 4884 ipfw_list_tifaces(); 4885 break; 4886 case TOK_TALIST: 4887 ipfw_list_ta(ac, av); 4888 break; 4889 case TOK_VLIST: 4890 ipfw_list_values(ac, av); 4891 break; 4892 } 4893 } 4894 4895 static int 4896 ipfw_get_tracked_ifaces(ipfw_obj_lheader **polh) 4897 { 4898 ipfw_obj_lheader req, *olh; 4899 size_t sz; 4900 4901 memset(&req, 0, sizeof(req)); 4902 sz = sizeof(req); 4903 4904 if (do_get3(IP_FW_XIFLIST, &req.opheader, &sz) != 0) { 4905 if (errno != ENOMEM) 4906 return (errno); 4907 } 4908 4909 sz = req.size; 4910 if ((olh = calloc(1, sz)) == NULL) 4911 return (ENOMEM); 4912 4913 olh->size = sz; 4914 if (do_get3(IP_FW_XIFLIST, &olh->opheader, &sz) != 0) { 4915 free(olh); 4916 return (errno); 4917 } 4918 4919 *polh = olh; 4920 return (0); 4921 } 4922 4923 static int 4924 ifinfo_cmp(const void *a, const void *b) 4925 { 4926 ipfw_iface_info *ia, *ib; 4927 4928 ia = (ipfw_iface_info *)a; 4929 ib = (ipfw_iface_info *)b; 4930 4931 return (stringnum_cmp(ia->ifname, ib->ifname)); 4932 } 4933 4934 /* 4935 * Retrieves table list from kernel, 4936 * optionally sorts it and calls requested function for each table. 4937 * Returns 0 on success. 4938 */ 4939 static void 4940 ipfw_list_tifaces() 4941 { 4942 ipfw_obj_lheader *olh; 4943 ipfw_iface_info *info; 4944 int i, error; 4945 4946 if ((error = ipfw_get_tracked_ifaces(&olh)) != 0) 4947 err(EX_OSERR, "Unable to request ipfw tracked interface list"); 4948 4949 4950 qsort(olh + 1, olh->count, olh->objsize, ifinfo_cmp); 4951 4952 info = (ipfw_iface_info *)(olh + 1); 4953 for (i = 0; i < olh->count; i++) { 4954 if (info->flags & IPFW_IFFLAG_RESOLVED) 4955 printf("%s ifindex: %d refcount: %u changes: %u\n", 4956 info->ifname, info->ifindex, info->refcnt, 4957 info->gencnt); 4958 else 4959 printf("%s ifindex: unresolved refcount: %u changes: %u\n", 4960 info->ifname, info->refcnt, info->gencnt); 4961 info = (ipfw_iface_info *)((caddr_t)info + olh->objsize); 4962 } 4963 4964 free(olh); 4965 } 4966 4967 4968 4969 4970