1 /*- 2 * Copyright (c) 2002-2003 Luigi Rizzo 3 * Copyright (c) 1996 Alex Nash, Paul Traina, Poul-Henning Kamp 4 * Copyright (c) 1994 Ugen J.S.Antsilevich 5 * 6 * Idea and grammar partially left from: 7 * Copyright (c) 1993 Daniel Boulet 8 * 9 * Redistribution and use in source forms, with and without modification, 10 * are permitted provided that this entire comment appears intact. 11 * 12 * Redistribution in binary form may occur without any restrictions. 13 * Obviously, it would be nice if you gave credit where credit is due 14 * but requiring it would be too onerous. 15 * 16 * This software is provided ``AS IS'' without any warranties of any kind. 17 * 18 * NEW command line interface for IP firewall facility 19 * 20 * $FreeBSD$ 21 */ 22 23 #include <sys/types.h> 24 #include <sys/param.h> 25 #include <sys/socket.h> 26 #include <sys/sockio.h> 27 #include <sys/sysctl.h> 28 29 #include "ipfw2.h" 30 31 #include <ctype.h> 32 #include <err.h> 33 #include <errno.h> 34 #include <grp.h> 35 #include <jail.h> 36 #include <netdb.h> 37 #include <pwd.h> 38 #include <stdio.h> 39 #include <stdarg.h> 40 #include <stdint.h> 41 #include <stdlib.h> 42 #include <string.h> 43 #include <sysexits.h> 44 #include <time.h> /* ctime */ 45 #include <timeconv.h> /* _long_to_time */ 46 #include <unistd.h> 47 #include <fcntl.h> 48 #include <stddef.h> /* offsetof */ 49 50 #include <net/ethernet.h> 51 #include <net/if.h> /* only IFNAMSIZ */ 52 #include <netinet/in.h> 53 #include <netinet/in_systm.h> /* only n_short, n_long */ 54 #include <netinet/ip.h> 55 #include <netinet/ip_icmp.h> 56 #include <netinet/ip_fw.h> 57 #include <netinet/tcp.h> 58 #include <arpa/inet.h> 59 60 struct cmdline_opts g_co; /* global options */ 61 62 struct format_opts { 63 int bcwidth; 64 int pcwidth; 65 int show_counters; 66 int show_time; /* show timestamp */ 67 uint32_t set_mask; /* enabled sets mask */ 68 uint32_t flags; /* request flags */ 69 uint32_t first; /* first rule to request */ 70 uint32_t last; /* last rule to request */ 71 uint32_t dcnt; /* number of dynamic states */ 72 ipfw_obj_ctlv *tstate; /* table state data */ 73 }; 74 75 int resvd_set_number = RESVD_SET; 76 77 static int ipfw_socket = -1; 78 79 #define CHECK_LENGTH(v, len) do { \ 80 if ((v) < (len)) \ 81 errx(EX_DATAERR, "Rule too long"); \ 82 } while (0) 83 /* 84 * Check if we have enough space in cmd buffer. Note that since 85 * first 8? u32 words are reserved by reserved header, full cmd 86 * buffer can't be used, so we need to protect from buffer overrun 87 * only. At the beginning, cblen is less than actual buffer size by 88 * size of ipfw_insn_u32 instruction + 1 u32 work. This eliminates need 89 * for checking small instructions fitting in given range. 90 * We also (ab)use the fact that ipfw_insn is always the first field 91 * for any custom instruction. 92 */ 93 #define CHECK_CMDLEN CHECK_LENGTH(cblen, F_LEN((ipfw_insn *)cmd)) 94 95 #define GET_UINT_ARG(arg, min, max, tok, s_x) do { \ 96 if (!av[0]) \ 97 errx(EX_USAGE, "%s: missing argument", match_value(s_x, tok)); \ 98 if (_substrcmp(*av, "tablearg") == 0) { \ 99 arg = IP_FW_TARG; \ 100 break; \ 101 } \ 102 \ 103 { \ 104 long _xval; \ 105 char *end; \ 106 \ 107 _xval = strtol(*av, &end, 10); \ 108 \ 109 if (!isdigit(**av) || *end != '\0' || (_xval == 0 && errno == EINVAL)) \ 110 errx(EX_DATAERR, "%s: invalid argument: %s", \ 111 match_value(s_x, tok), *av); \ 112 \ 113 if (errno == ERANGE || _xval < min || _xval > max) \ 114 errx(EX_DATAERR, "%s: argument is out of range (%u..%u): %s", \ 115 match_value(s_x, tok), min, max, *av); \ 116 \ 117 if (_xval == IP_FW_TARG) \ 118 errx(EX_DATAERR, "%s: illegal argument value: %s", \ 119 match_value(s_x, tok), *av); \ 120 arg = _xval; \ 121 } \ 122 } while (0) 123 124 static struct _s_x f_tcpflags[] = { 125 { "syn", TH_SYN }, 126 { "fin", TH_FIN }, 127 { "ack", TH_ACK }, 128 { "psh", TH_PUSH }, 129 { "rst", TH_RST }, 130 { "urg", TH_URG }, 131 { "tcp flag", 0 }, 132 { NULL, 0 } 133 }; 134 135 static struct _s_x f_tcpopts[] = { 136 { "mss", IP_FW_TCPOPT_MSS }, 137 { "maxseg", IP_FW_TCPOPT_MSS }, 138 { "window", IP_FW_TCPOPT_WINDOW }, 139 { "sack", IP_FW_TCPOPT_SACK }, 140 { "ts", IP_FW_TCPOPT_TS }, 141 { "timestamp", IP_FW_TCPOPT_TS }, 142 { "cc", IP_FW_TCPOPT_CC }, 143 { "tcp option", 0 }, 144 { NULL, 0 } 145 }; 146 147 /* 148 * IP options span the range 0 to 255 so we need to remap them 149 * (though in fact only the low 5 bits are significant). 150 */ 151 static struct _s_x f_ipopts[] = { 152 { "ssrr", IP_FW_IPOPT_SSRR}, 153 { "lsrr", IP_FW_IPOPT_LSRR}, 154 { "rr", IP_FW_IPOPT_RR}, 155 { "ts", IP_FW_IPOPT_TS}, 156 { "ip option", 0 }, 157 { NULL, 0 } 158 }; 159 160 static struct _s_x f_iptos[] = { 161 { "lowdelay", IPTOS_LOWDELAY}, 162 { "throughput", IPTOS_THROUGHPUT}, 163 { "reliability", IPTOS_RELIABILITY}, 164 { "mincost", IPTOS_MINCOST}, 165 { "congestion", IPTOS_ECN_CE}, 166 { "ecntransport", IPTOS_ECN_ECT0}, 167 { "ip tos option", 0}, 168 { NULL, 0 } 169 }; 170 171 static struct _s_x f_ipoff[] = { 172 { "rf", IP_RF >> 8 }, 173 { "df", IP_DF >> 8 }, 174 { "mf", IP_MF >> 8 }, 175 { "offset", 0x1 }, 176 { NULL, 0} 177 }; 178 179 struct _s_x f_ipdscp[] = { 180 { "af11", IPTOS_DSCP_AF11 >> 2 }, /* 001010 */ 181 { "af12", IPTOS_DSCP_AF12 >> 2 }, /* 001100 */ 182 { "af13", IPTOS_DSCP_AF13 >> 2 }, /* 001110 */ 183 { "af21", IPTOS_DSCP_AF21 >> 2 }, /* 010010 */ 184 { "af22", IPTOS_DSCP_AF22 >> 2 }, /* 010100 */ 185 { "af23", IPTOS_DSCP_AF23 >> 2 }, /* 010110 */ 186 { "af31", IPTOS_DSCP_AF31 >> 2 }, /* 011010 */ 187 { "af32", IPTOS_DSCP_AF32 >> 2 }, /* 011100 */ 188 { "af33", IPTOS_DSCP_AF33 >> 2 }, /* 011110 */ 189 { "af41", IPTOS_DSCP_AF41 >> 2 }, /* 100010 */ 190 { "af42", IPTOS_DSCP_AF42 >> 2 }, /* 100100 */ 191 { "af43", IPTOS_DSCP_AF43 >> 2 }, /* 100110 */ 192 { "be", IPTOS_DSCP_CS0 >> 2 }, /* 000000 */ 193 { "ef", IPTOS_DSCP_EF >> 2 }, /* 101110 */ 194 { "cs0", IPTOS_DSCP_CS0 >> 2 }, /* 000000 */ 195 { "cs1", IPTOS_DSCP_CS1 >> 2 }, /* 001000 */ 196 { "cs2", IPTOS_DSCP_CS2 >> 2 }, /* 010000 */ 197 { "cs3", IPTOS_DSCP_CS3 >> 2 }, /* 011000 */ 198 { "cs4", IPTOS_DSCP_CS4 >> 2 }, /* 100000 */ 199 { "cs5", IPTOS_DSCP_CS5 >> 2 }, /* 101000 */ 200 { "cs6", IPTOS_DSCP_CS6 >> 2 }, /* 110000 */ 201 { "cs7", IPTOS_DSCP_CS7 >> 2 }, /* 100000 */ 202 { NULL, 0 } 203 }; 204 205 static struct _s_x limit_masks[] = { 206 {"all", DYN_SRC_ADDR|DYN_SRC_PORT|DYN_DST_ADDR|DYN_DST_PORT}, 207 {"src-addr", DYN_SRC_ADDR}, 208 {"src-port", DYN_SRC_PORT}, 209 {"dst-addr", DYN_DST_ADDR}, 210 {"dst-port", DYN_DST_PORT}, 211 {NULL, 0} 212 }; 213 214 /* 215 * we use IPPROTO_ETHERTYPE as a fake protocol id to call the print routines 216 * This is only used in this code. 217 */ 218 #define IPPROTO_ETHERTYPE 0x1000 219 static struct _s_x ether_types[] = { 220 /* 221 * Note, we cannot use "-:&/" in the names because they are field 222 * separators in the type specifications. Also, we use s = NULL as 223 * end-delimiter, because a type of 0 can be legal. 224 */ 225 { "ip", 0x0800 }, 226 { "ipv4", 0x0800 }, 227 { "ipv6", 0x86dd }, 228 { "arp", 0x0806 }, 229 { "rarp", 0x8035 }, 230 { "vlan", 0x8100 }, 231 { "loop", 0x9000 }, 232 { "trail", 0x1000 }, 233 { "at", 0x809b }, 234 { "atalk", 0x809b }, 235 { "aarp", 0x80f3 }, 236 { "pppoe_disc", 0x8863 }, 237 { "pppoe_sess", 0x8864 }, 238 { "ipx_8022", 0x00E0 }, 239 { "ipx_8023", 0x0000 }, 240 { "ipx_ii", 0x8137 }, 241 { "ipx_snap", 0x8137 }, 242 { "ipx", 0x8137 }, 243 { "ns", 0x0600 }, 244 { NULL, 0 } 245 }; 246 247 static struct _s_x rule_eactions[] = { 248 { "nat64clat", TOK_NAT64CLAT }, 249 { "nat64lsn", TOK_NAT64LSN }, 250 { "nat64stl", TOK_NAT64STL }, 251 { "nptv6", TOK_NPTV6 }, 252 { "tcp-setmss", TOK_TCPSETMSS }, 253 { NULL, 0 } /* terminator */ 254 }; 255 256 static struct _s_x rule_actions[] = { 257 { "abort6", TOK_ABORT6 }, 258 { "abort", TOK_ABORT }, 259 { "accept", TOK_ACCEPT }, 260 { "pass", TOK_ACCEPT }, 261 { "allow", TOK_ACCEPT }, 262 { "permit", TOK_ACCEPT }, 263 { "count", TOK_COUNT }, 264 { "pipe", TOK_PIPE }, 265 { "queue", TOK_QUEUE }, 266 { "divert", TOK_DIVERT }, 267 { "tee", TOK_TEE }, 268 { "netgraph", TOK_NETGRAPH }, 269 { "ngtee", TOK_NGTEE }, 270 { "fwd", TOK_FORWARD }, 271 { "forward", TOK_FORWARD }, 272 { "skipto", TOK_SKIPTO }, 273 { "deny", TOK_DENY }, 274 { "drop", TOK_DENY }, 275 { "reject", TOK_REJECT }, 276 { "reset6", TOK_RESET6 }, 277 { "reset", TOK_RESET }, 278 { "unreach6", TOK_UNREACH6 }, 279 { "unreach", TOK_UNREACH }, 280 { "check-state", TOK_CHECKSTATE }, 281 { "//", TOK_COMMENT }, 282 { "nat", TOK_NAT }, 283 { "reass", TOK_REASS }, 284 { "setfib", TOK_SETFIB }, 285 { "setdscp", TOK_SETDSCP }, 286 { "call", TOK_CALL }, 287 { "return", TOK_RETURN }, 288 { "eaction", TOK_EACTION }, 289 { "tcp-setmss", TOK_TCPSETMSS }, 290 { NULL, 0 } /* terminator */ 291 }; 292 293 static struct _s_x rule_action_params[] = { 294 { "altq", TOK_ALTQ }, 295 { "log", TOK_LOG }, 296 { "tag", TOK_TAG }, 297 { "untag", TOK_UNTAG }, 298 { NULL, 0 } /* terminator */ 299 }; 300 301 /* 302 * The 'lookup' instruction accepts one of the following arguments. 303 * -1 is a terminator for the list. 304 * Arguments are passed as v[1] in O_DST_LOOKUP options. 305 */ 306 static int lookup_key[] = { 307 TOK_DSTIP, TOK_SRCIP, TOK_DSTPORT, TOK_SRCPORT, 308 TOK_UID, TOK_JAIL, TOK_DSCP, -1 }; 309 310 static struct _s_x rule_options[] = { 311 { "tagged", TOK_TAGGED }, 312 { "uid", TOK_UID }, 313 { "gid", TOK_GID }, 314 { "jail", TOK_JAIL }, 315 { "in", TOK_IN }, 316 { "limit", TOK_LIMIT }, 317 { "set-limit", TOK_SETLIMIT }, 318 { "keep-state", TOK_KEEPSTATE }, 319 { "record-state", TOK_RECORDSTATE }, 320 { "bridged", TOK_LAYER2 }, 321 { "layer2", TOK_LAYER2 }, 322 { "out", TOK_OUT }, 323 { "diverted", TOK_DIVERTED }, 324 { "diverted-loopback", TOK_DIVERTEDLOOPBACK }, 325 { "diverted-output", TOK_DIVERTEDOUTPUT }, 326 { "xmit", TOK_XMIT }, 327 { "recv", TOK_RECV }, 328 { "via", TOK_VIA }, 329 { "fragment", TOK_FRAG }, 330 { "frag", TOK_FRAG }, 331 { "fib", TOK_FIB }, 332 { "ipoptions", TOK_IPOPTS }, 333 { "ipopts", TOK_IPOPTS }, 334 { "iplen", TOK_IPLEN }, 335 { "ipid", TOK_IPID }, 336 { "ipprecedence", TOK_IPPRECEDENCE }, 337 { "dscp", TOK_DSCP }, 338 { "iptos", TOK_IPTOS }, 339 { "ipttl", TOK_IPTTL }, 340 { "ipversion", TOK_IPVER }, 341 { "ipver", TOK_IPVER }, 342 { "estab", TOK_ESTAB }, 343 { "established", TOK_ESTAB }, 344 { "setup", TOK_SETUP }, 345 { "sockarg", TOK_SOCKARG }, 346 { "tcpdatalen", TOK_TCPDATALEN }, 347 { "tcpflags", TOK_TCPFLAGS }, 348 { "tcpflgs", TOK_TCPFLAGS }, 349 { "tcpmss", TOK_TCPMSS }, 350 { "tcpoptions", TOK_TCPOPTS }, 351 { "tcpopts", TOK_TCPOPTS }, 352 { "tcpseq", TOK_TCPSEQ }, 353 { "tcpack", TOK_TCPACK }, 354 { "tcpwin", TOK_TCPWIN }, 355 { "icmptype", TOK_ICMPTYPES }, 356 { "icmptypes", TOK_ICMPTYPES }, 357 { "dst-ip", TOK_DSTIP }, 358 { "src-ip", TOK_SRCIP }, 359 { "dst-port", TOK_DSTPORT }, 360 { "src-port", TOK_SRCPORT }, 361 { "proto", TOK_PROTO }, 362 { "MAC", TOK_MAC }, 363 { "mac", TOK_MAC }, 364 { "mac-type", TOK_MACTYPE }, 365 { "verrevpath", TOK_VERREVPATH }, 366 { "versrcreach", TOK_VERSRCREACH }, 367 { "antispoof", TOK_ANTISPOOF }, 368 { "ipsec", TOK_IPSEC }, 369 { "icmp6type", TOK_ICMP6TYPES }, 370 { "icmp6types", TOK_ICMP6TYPES }, 371 { "ext6hdr", TOK_EXT6HDR}, 372 { "flow-id", TOK_FLOWID}, 373 { "ipv6", TOK_IPV6}, 374 { "ip6", TOK_IPV6}, 375 { "ipv4", TOK_IPV4}, 376 { "ip4", TOK_IPV4}, 377 { "dst-ipv6", TOK_DSTIP6}, 378 { "dst-ip6", TOK_DSTIP6}, 379 { "src-ipv6", TOK_SRCIP6}, 380 { "src-ip6", TOK_SRCIP6}, 381 { "lookup", TOK_LOOKUP}, 382 { "flow", TOK_FLOW}, 383 { "defer-action", TOK_SKIPACTION }, 384 { "defer-immediate-action", TOK_SKIPACTION }, 385 { "//", TOK_COMMENT }, 386 387 { "not", TOK_NOT }, /* pseudo option */ 388 { "!", /* escape ? */ TOK_NOT }, /* pseudo option */ 389 { "or", TOK_OR }, /* pseudo option */ 390 { "|", /* escape */ TOK_OR }, /* pseudo option */ 391 { "{", TOK_STARTBRACE }, /* pseudo option */ 392 { "(", TOK_STARTBRACE }, /* pseudo option */ 393 { "}", TOK_ENDBRACE }, /* pseudo option */ 394 { ")", TOK_ENDBRACE }, /* pseudo option */ 395 { NULL, 0 } /* terminator */ 396 }; 397 398 void bprint_uint_arg(struct buf_pr *bp, const char *str, uint32_t arg); 399 static int ipfw_get_config(struct cmdline_opts *co, struct format_opts *fo, 400 ipfw_cfg_lheader **pcfg, size_t *psize); 401 static int ipfw_show_config(struct cmdline_opts *co, struct format_opts *fo, 402 ipfw_cfg_lheader *cfg, size_t sz, int ac, char **av); 403 static void ipfw_list_tifaces(void); 404 405 struct tidx; 406 static uint16_t pack_object(struct tidx *tstate, const char *name, int otype); 407 static uint16_t pack_table(struct tidx *tstate, const char *name); 408 409 static char *table_search_ctlv(ipfw_obj_ctlv *ctlv, uint16_t idx); 410 static void object_sort_ctlv(ipfw_obj_ctlv *ctlv); 411 static char *object_search_ctlv(ipfw_obj_ctlv *ctlv, uint16_t idx, 412 uint16_t type); 413 414 /* 415 * Simple string buffer API. 416 * Used to simplify buffer passing between function and for 417 * transparent overrun handling. 418 */ 419 420 /* 421 * Allocates new buffer of given size @sz. 422 * 423 * Returns 0 on success. 424 */ 425 int 426 bp_alloc(struct buf_pr *b, size_t size) 427 { 428 memset(b, 0, sizeof(struct buf_pr)); 429 430 if ((b->buf = calloc(1, size)) == NULL) 431 return (ENOMEM); 432 433 b->ptr = b->buf; 434 b->size = size; 435 b->avail = b->size; 436 437 return (0); 438 } 439 440 void 441 bp_free(struct buf_pr *b) 442 { 443 444 free(b->buf); 445 } 446 447 /* 448 * Flushes buffer so new writer start from beginning. 449 */ 450 void 451 bp_flush(struct buf_pr *b) 452 { 453 454 b->ptr = b->buf; 455 b->avail = b->size; 456 b->buf[0] = '\0'; 457 } 458 459 /* 460 * Print message specified by @format and args. 461 * Automatically manage buffer space and transparently handle 462 * buffer overruns. 463 * 464 * Returns number of bytes that should have been printed. 465 */ 466 int 467 bprintf(struct buf_pr *b, const char *format, ...) 468 { 469 va_list args; 470 int i; 471 472 va_start(args, format); 473 474 i = vsnprintf(b->ptr, b->avail, format, args); 475 va_end(args); 476 477 if (i < 0 || (size_t)i > b->avail) { 478 /* Overflow or print error */ 479 b->avail = 0; 480 } else { 481 b->ptr += i; 482 b->avail -= i; 483 } 484 485 b->needed += i; 486 487 return (i); 488 } 489 490 /* 491 * Special values printer for tablearg-aware opcodes. 492 */ 493 void 494 bprint_uint_arg(struct buf_pr *bp, const char *str, uint32_t arg) 495 { 496 497 if (str != NULL) 498 bprintf(bp, "%s", str); 499 if (arg == IP_FW_TARG) 500 bprintf(bp, "tablearg"); 501 else 502 bprintf(bp, "%u", arg); 503 } 504 505 /* 506 * Helper routine to print a possibly unaligned uint64_t on 507 * various platform. If width > 0, print the value with 508 * the desired width, followed by a space; 509 * otherwise, return the required width. 510 */ 511 int 512 pr_u64(struct buf_pr *b, void *pd, int width) 513 { 514 #ifdef TCC 515 #define U64_FMT "I64" 516 #else 517 #define U64_FMT "llu" 518 #endif 519 uint64_t u; 520 unsigned long long d; 521 522 bcopy (pd, &u, sizeof(u)); 523 d = u; 524 return (width > 0) ? 525 bprintf(b, "%*" U64_FMT " ", width, d) : 526 snprintf(NULL, 0, "%" U64_FMT, d) ; 527 #undef U64_FMT 528 } 529 530 531 void * 532 safe_calloc(size_t number, size_t size) 533 { 534 void *ret = calloc(number, size); 535 536 if (ret == NULL) 537 err(EX_OSERR, "calloc"); 538 return ret; 539 } 540 541 void * 542 safe_realloc(void *ptr, size_t size) 543 { 544 void *ret = realloc(ptr, size); 545 546 if (ret == NULL) 547 err(EX_OSERR, "realloc"); 548 return ret; 549 } 550 551 /* 552 * Compare things like interface or table names. 553 */ 554 int 555 stringnum_cmp(const char *a, const char *b) 556 { 557 int la, lb; 558 559 la = strlen(a); 560 lb = strlen(b); 561 562 if (la > lb) 563 return (1); 564 else if (la < lb) 565 return (-01); 566 567 return (strcmp(a, b)); 568 } 569 570 571 /* 572 * conditionally runs the command. 573 * Selected options or negative -> getsockopt 574 */ 575 int 576 do_cmd(int optname, void *optval, uintptr_t optlen) 577 { 578 int i; 579 580 if (g_co.test_only) 581 return 0; 582 583 if (ipfw_socket == -1) 584 ipfw_socket = socket(AF_INET, SOCK_RAW, IPPROTO_RAW); 585 if (ipfw_socket < 0) 586 err(EX_UNAVAILABLE, "socket"); 587 588 if (optname == IP_FW_GET || optname == IP_DUMMYNET_GET || 589 optname == IP_FW_ADD || optname == IP_FW3 || 590 optname == IP_FW_NAT_GET_CONFIG || 591 optname < 0 || 592 optname == IP_FW_NAT_GET_LOG) { 593 if (optname < 0) 594 optname = -optname; 595 i = getsockopt(ipfw_socket, IPPROTO_IP, optname, optval, 596 (socklen_t *)optlen); 597 } else { 598 i = setsockopt(ipfw_socket, IPPROTO_IP, optname, optval, optlen); 599 } 600 return i; 601 } 602 603 /* 604 * do_set3 - pass ipfw control cmd to kernel 605 * @optname: option name 606 * @optval: pointer to option data 607 * @optlen: option length 608 * 609 * Assumes op3 header is already embedded. 610 * Calls setsockopt() with IP_FW3 as kernel-visible opcode. 611 * Returns 0 on success or errno otherwise. 612 */ 613 int 614 do_set3(int optname, ip_fw3_opheader *op3, size_t optlen) 615 { 616 617 if (g_co.test_only) 618 return (0); 619 620 if (ipfw_socket == -1) 621 ipfw_socket = socket(AF_INET, SOCK_RAW, IPPROTO_RAW); 622 if (ipfw_socket < 0) 623 err(EX_UNAVAILABLE, "socket"); 624 625 op3->opcode = optname; 626 627 return (setsockopt(ipfw_socket, IPPROTO_IP, IP_FW3, op3, optlen)); 628 } 629 630 /* 631 * do_get3 - pass ipfw control cmd to kernel 632 * @optname: option name 633 * @optval: pointer to option data 634 * @optlen: pointer to option length 635 * 636 * Assumes op3 header is already embedded. 637 * Calls getsockopt() with IP_FW3 as kernel-visible opcode. 638 * Returns 0 on success or errno otherwise. 639 */ 640 int 641 do_get3(int optname, ip_fw3_opheader *op3, size_t *optlen) 642 { 643 int error; 644 socklen_t len; 645 646 if (g_co.test_only) 647 return (0); 648 649 if (ipfw_socket == -1) 650 ipfw_socket = socket(AF_INET, SOCK_RAW, IPPROTO_RAW); 651 if (ipfw_socket < 0) 652 err(EX_UNAVAILABLE, "socket"); 653 654 op3->opcode = optname; 655 656 len = *optlen; 657 error = getsockopt(ipfw_socket, IPPROTO_IP, IP_FW3, op3, &len); 658 *optlen = len; 659 660 return (error); 661 } 662 663 /** 664 * match_token takes a table and a string, returns the value associated 665 * with the string (-1 in case of failure). 666 */ 667 int 668 match_token(struct _s_x *table, const char *string) 669 { 670 struct _s_x *pt; 671 uint i = strlen(string); 672 673 for (pt = table ; i && pt->s != NULL ; pt++) 674 if (strlen(pt->s) == i && !bcmp(string, pt->s, i)) 675 return pt->x; 676 return (-1); 677 } 678 679 /** 680 * match_token_relaxed takes a table and a string, returns the value associated 681 * with the string for the best match. 682 * 683 * Returns: 684 * value from @table for matched records 685 * -1 for non-matched records 686 * -2 if more than one records match @string. 687 */ 688 int 689 match_token_relaxed(struct _s_x *table, const char *string) 690 { 691 struct _s_x *pt, *m; 692 int i, c; 693 694 i = strlen(string); 695 c = 0; 696 697 for (pt = table ; i != 0 && pt->s != NULL ; pt++) { 698 if (strncmp(pt->s, string, i) != 0) 699 continue; 700 m = pt; 701 c++; 702 } 703 704 if (c == 1) 705 return (m->x); 706 707 return (c > 0 ? -2: -1); 708 } 709 710 int 711 get_token(struct _s_x *table, const char *string, const char *errbase) 712 { 713 int tcmd; 714 715 if ((tcmd = match_token_relaxed(table, string)) < 0) 716 errx(EX_USAGE, "%s %s %s", 717 (tcmd == 0) ? "invalid" : "ambiguous", errbase, string); 718 719 return (tcmd); 720 } 721 722 /** 723 * match_value takes a table and a value, returns the string associated 724 * with the value (NULL in case of failure). 725 */ 726 char const * 727 match_value(struct _s_x *p, int value) 728 { 729 for (; p->s != NULL; p++) 730 if (p->x == value) 731 return p->s; 732 return NULL; 733 } 734 735 size_t 736 concat_tokens(char *buf, size_t bufsize, struct _s_x *table, 737 const char *delimiter) 738 { 739 struct _s_x *pt; 740 int l; 741 size_t sz; 742 743 for (sz = 0, pt = table ; pt->s != NULL; pt++) { 744 l = snprintf(buf + sz, bufsize - sz, "%s%s", 745 (sz == 0) ? "" : delimiter, pt->s); 746 sz += l; 747 bufsize += l; 748 if (sz > bufsize) 749 return (bufsize); 750 } 751 752 return (sz); 753 } 754 755 /* 756 * helper function to process a set of flags and set bits in the 757 * appropriate masks. 758 */ 759 int 760 fill_flags(struct _s_x *flags, char *p, char **e, uint32_t *set, 761 uint32_t *clear) 762 { 763 char *q; /* points to the separator */ 764 int val; 765 uint32_t *which; /* mask we are working on */ 766 767 while (p && *p) { 768 if (*p == '!') { 769 p++; 770 which = clear; 771 } else 772 which = set; 773 q = strchr(p, ','); 774 if (q) 775 *q++ = '\0'; 776 val = match_token(flags, p); 777 if (val <= 0) { 778 if (e != NULL) 779 *e = p; 780 return (-1); 781 } 782 *which |= (uint32_t)val; 783 p = q; 784 } 785 return (0); 786 } 787 788 void 789 print_flags_buffer(char *buf, size_t sz, struct _s_x *list, uint32_t set) 790 { 791 char const *comma = ""; 792 int i, l; 793 794 for (i = 0; list[i].x != 0; i++) { 795 if ((set & list[i].x) == 0) 796 continue; 797 798 set &= ~list[i].x; 799 l = snprintf(buf, sz, "%s%s", comma, list[i].s); 800 if (l < 0 || (size_t)l >= sz) 801 return; 802 comma = ","; 803 buf += l; 804 sz -=l; 805 } 806 } 807 808 /* 809 * _substrcmp takes two strings and returns 1 if they do not match, 810 * and 0 if they match exactly or the first string is a sub-string 811 * of the second. A warning is printed to stderr in the case that the 812 * first string is a sub-string of the second. 813 * 814 * This function will be removed in the future through the usual 815 * deprecation process. 816 */ 817 int 818 _substrcmp(const char *str1, const char* str2) 819 { 820 821 if (strncmp(str1, str2, strlen(str1)) != 0) 822 return 1; 823 824 if (strlen(str1) != strlen(str2)) 825 warnx("DEPRECATED: '%s' matched '%s' as a sub-string", 826 str1, str2); 827 return 0; 828 } 829 830 /* 831 * _substrcmp2 takes three strings and returns 1 if the first two do not match, 832 * and 0 if they match exactly or the second string is a sub-string 833 * of the first. A warning is printed to stderr in the case that the 834 * first string does not match the third. 835 * 836 * This function exists to warn about the bizarre construction 837 * strncmp(str, "by", 2) which is used to allow people to use a shortcut 838 * for "bytes". The problem is that in addition to accepting "by", 839 * "byt", "byte", and "bytes", it also excepts "by_rabid_dogs" and any 840 * other string beginning with "by". 841 * 842 * This function will be removed in the future through the usual 843 * deprecation process. 844 */ 845 int 846 _substrcmp2(const char *str1, const char* str2, const char* str3) 847 { 848 849 if (strncmp(str1, str2, strlen(str2)) != 0) 850 return 1; 851 852 if (strcmp(str1, str3) != 0) 853 warnx("DEPRECATED: '%s' matched '%s'", 854 str1, str3); 855 return 0; 856 } 857 858 /* 859 * prints one port, symbolic or numeric 860 */ 861 static void 862 print_port(struct buf_pr *bp, int proto, uint16_t port) 863 { 864 865 if (proto == IPPROTO_ETHERTYPE) { 866 char const *s; 867 868 if (g_co.do_resolv && (s = match_value(ether_types, port)) ) 869 bprintf(bp, "%s", s); 870 else 871 bprintf(bp, "0x%04x", port); 872 } else { 873 struct servent *se = NULL; 874 if (g_co.do_resolv) { 875 struct protoent *pe = getprotobynumber(proto); 876 877 se = getservbyport(htons(port), pe ? pe->p_name : NULL); 878 } 879 if (se) 880 bprintf(bp, "%s", se->s_name); 881 else 882 bprintf(bp, "%d", port); 883 } 884 } 885 886 static struct _s_x _port_name[] = { 887 {"dst-port", O_IP_DSTPORT}, 888 {"src-port", O_IP_SRCPORT}, 889 {"ipid", O_IPID}, 890 {"iplen", O_IPLEN}, 891 {"ipttl", O_IPTTL}, 892 {"mac-type", O_MAC_TYPE}, 893 {"tcpdatalen", O_TCPDATALEN}, 894 {"tcpmss", O_TCPMSS}, 895 {"tcpwin", O_TCPWIN}, 896 {"tagged", O_TAGGED}, 897 {NULL, 0} 898 }; 899 900 /* 901 * Print the values in a list 16-bit items of the types above. 902 * XXX todo: add support for mask. 903 */ 904 static void 905 print_newports(struct buf_pr *bp, const ipfw_insn_u16 *cmd, int proto, int opcode) 906 { 907 const uint16_t *p = cmd->ports; 908 int i; 909 char const *sep; 910 911 if (opcode != 0) { 912 sep = match_value(_port_name, opcode); 913 if (sep == NULL) 914 sep = "???"; 915 bprintf(bp, " %s", sep); 916 } 917 sep = " "; 918 for (i = F_LEN((const ipfw_insn *)cmd) - 1; i > 0; i--, p += 2) { 919 bprintf(bp, "%s", sep); 920 print_port(bp, proto, p[0]); 921 if (p[0] != p[1]) { 922 bprintf(bp, "-"); 923 print_port(bp, proto, p[1]); 924 } 925 sep = ","; 926 } 927 } 928 929 /* 930 * Like strtol, but also translates service names into port numbers 931 * for some protocols. 932 * In particular: 933 * proto == -1 disables the protocol check; 934 * proto == IPPROTO_ETHERTYPE looks up an internal table 935 * proto == <some value in /etc/protocols> matches the values there. 936 * Returns *end == s in case the parameter is not found. 937 */ 938 static int 939 strtoport(char *s, char **end, int base, int proto) 940 { 941 char *p, *buf; 942 char *s1; 943 int i; 944 945 *end = s; /* default - not found */ 946 if (*s == '\0') 947 return 0; /* not found */ 948 949 if (isdigit(*s)) 950 return strtol(s, end, base); 951 952 /* 953 * find separator. '\\' escapes the next char. 954 */ 955 for (s1 = s; *s1 && (isalnum(*s1) || *s1 == '\\' || 956 *s1 == '_' || *s1 == '.') ; s1++) 957 if (*s1 == '\\' && s1[1] != '\0') 958 s1++; 959 960 buf = safe_calloc(s1 - s + 1, 1); 961 962 /* 963 * copy into a buffer skipping backslashes 964 */ 965 for (p = s, i = 0; p != s1 ; p++) 966 if (*p != '\\') 967 buf[i++] = *p; 968 buf[i++] = '\0'; 969 970 if (proto == IPPROTO_ETHERTYPE) { 971 i = match_token(ether_types, buf); 972 free(buf); 973 if (i != -1) { /* found */ 974 *end = s1; 975 return i; 976 } 977 } else { 978 struct protoent *pe = NULL; 979 struct servent *se; 980 981 if (proto != 0) 982 pe = getprotobynumber(proto); 983 setservent(1); 984 se = getservbyname(buf, pe ? pe->p_name : NULL); 985 free(buf); 986 if (se != NULL) { 987 *end = s1; 988 return ntohs(se->s_port); 989 } 990 } 991 return 0; /* not found */ 992 } 993 994 /* 995 * Fill the body of the command with the list of port ranges. 996 */ 997 static int 998 fill_newports(ipfw_insn_u16 *cmd, char *av, int proto, int cblen) 999 { 1000 uint16_t a, b, *p = cmd->ports; 1001 int i = 0; 1002 char *s = av; 1003 1004 while (*s) { 1005 a = strtoport(av, &s, 0, proto); 1006 if (s == av) /* empty or invalid argument */ 1007 return (0); 1008 1009 CHECK_LENGTH(cblen, i + 2); 1010 1011 switch (*s) { 1012 case '-': /* a range */ 1013 av = s + 1; 1014 b = strtoport(av, &s, 0, proto); 1015 /* Reject expressions like '1-abc' or '1-2-3'. */ 1016 if (s == av || (*s != ',' && *s != '\0')) 1017 return (0); 1018 p[0] = a; 1019 p[1] = b; 1020 break; 1021 case ',': /* comma separated list */ 1022 case '\0': 1023 p[0] = p[1] = a; 1024 break; 1025 default: 1026 warnx("port list: invalid separator <%c> in <%s>", 1027 *s, av); 1028 return (0); 1029 } 1030 1031 i++; 1032 p += 2; 1033 av = s + 1; 1034 } 1035 if (i > 0) { 1036 if (i + 1 > F_LEN_MASK) 1037 errx(EX_DATAERR, "too many ports/ranges\n"); 1038 cmd->o.len |= i + 1; /* leave F_NOT and F_OR untouched */ 1039 } 1040 return (i); 1041 } 1042 1043 /* 1044 * Fill the body of the command with the list of DiffServ codepoints. 1045 */ 1046 static void 1047 fill_dscp(ipfw_insn *cmd, char *av, int cblen) 1048 { 1049 uint32_t *low, *high; 1050 char *s = av, *a; 1051 int code; 1052 1053 cmd->opcode = O_DSCP; 1054 cmd->len |= F_INSN_SIZE(ipfw_insn_u32) + 1; 1055 1056 CHECK_CMDLEN; 1057 1058 low = (uint32_t *)(cmd + 1); 1059 high = low + 1; 1060 1061 *low = 0; 1062 *high = 0; 1063 1064 while (s != NULL) { 1065 a = strchr(s, ','); 1066 1067 if (a != NULL) 1068 *a++ = '\0'; 1069 1070 if (isalpha(*s)) { 1071 if ((code = match_token(f_ipdscp, s)) == -1) 1072 errx(EX_DATAERR, "Unknown DSCP code"); 1073 } else { 1074 code = strtoul(s, NULL, 10); 1075 if (code < 0 || code > 63) 1076 errx(EX_DATAERR, "Invalid DSCP value"); 1077 } 1078 1079 if (code >= 32) 1080 *high |= 1 << (code - 32); 1081 else 1082 *low |= 1 << code; 1083 1084 s = a; 1085 } 1086 } 1087 1088 static struct _s_x icmpcodes[] = { 1089 { "net", ICMP_UNREACH_NET }, 1090 { "host", ICMP_UNREACH_HOST }, 1091 { "protocol", ICMP_UNREACH_PROTOCOL }, 1092 { "port", ICMP_UNREACH_PORT }, 1093 { "needfrag", ICMP_UNREACH_NEEDFRAG }, 1094 { "srcfail", ICMP_UNREACH_SRCFAIL }, 1095 { "net-unknown", ICMP_UNREACH_NET_UNKNOWN }, 1096 { "host-unknown", ICMP_UNREACH_HOST_UNKNOWN }, 1097 { "isolated", ICMP_UNREACH_ISOLATED }, 1098 { "net-prohib", ICMP_UNREACH_NET_PROHIB }, 1099 { "host-prohib", ICMP_UNREACH_HOST_PROHIB }, 1100 { "tosnet", ICMP_UNREACH_TOSNET }, 1101 { "toshost", ICMP_UNREACH_TOSHOST }, 1102 { "filter-prohib", ICMP_UNREACH_FILTER_PROHIB }, 1103 { "host-precedence", ICMP_UNREACH_HOST_PRECEDENCE }, 1104 { "precedence-cutoff", ICMP_UNREACH_PRECEDENCE_CUTOFF }, 1105 { NULL, 0 } 1106 }; 1107 1108 static void 1109 fill_reject_code(u_short *codep, char *str) 1110 { 1111 int val; 1112 char *s; 1113 1114 val = strtoul(str, &s, 0); 1115 if (s == str || *s != '\0' || val >= 0x100) 1116 val = match_token(icmpcodes, str); 1117 if (val < 0) 1118 errx(EX_DATAERR, "unknown ICMP unreachable code ``%s''", str); 1119 *codep = val; 1120 return; 1121 } 1122 1123 static void 1124 print_reject_code(struct buf_pr *bp, uint16_t code) 1125 { 1126 char const *s; 1127 1128 if ((s = match_value(icmpcodes, code)) != NULL) 1129 bprintf(bp, "unreach %s", s); 1130 else 1131 bprintf(bp, "unreach %u", code); 1132 } 1133 1134 /* 1135 * Returns the number of bits set (from left) in a contiguous bitmask, 1136 * or -1 if the mask is not contiguous. 1137 * XXX this needs a proper fix. 1138 * This effectively works on masks in big-endian (network) format. 1139 * when compiled on little endian architectures. 1140 * 1141 * First bit is bit 7 of the first byte -- note, for MAC addresses, 1142 * the first bit on the wire is bit 0 of the first byte. 1143 * len is the max length in bits. 1144 */ 1145 int 1146 contigmask(const uint8_t *p, int len) 1147 { 1148 int i, n; 1149 1150 for (i=0; i<len ; i++) 1151 if ( (p[i/8] & (1 << (7 - (i%8)))) == 0) /* first bit unset */ 1152 break; 1153 for (n=i+1; n < len; n++) 1154 if ( (p[n/8] & (1 << (7 - (n%8)))) != 0) 1155 return -1; /* mask not contiguous */ 1156 return i; 1157 } 1158 1159 /* 1160 * print flags set/clear in the two bitmasks passed as parameters. 1161 * There is a specialized check for f_tcpflags. 1162 */ 1163 static void 1164 print_flags(struct buf_pr *bp, char const *name, const ipfw_insn *cmd, 1165 struct _s_x *list) 1166 { 1167 char const *comma = ""; 1168 int i; 1169 uint8_t set = cmd->arg1 & 0xff; 1170 uint8_t clear = (cmd->arg1 >> 8) & 0xff; 1171 1172 if (list == f_tcpflags && set == TH_SYN && clear == TH_ACK) { 1173 bprintf(bp, " setup"); 1174 return; 1175 } 1176 1177 bprintf(bp, " %s ", name); 1178 for (i=0; list[i].x != 0; i++) { 1179 if (set & list[i].x) { 1180 set &= ~list[i].x; 1181 bprintf(bp, "%s%s", comma, list[i].s); 1182 comma = ","; 1183 } 1184 if (clear & list[i].x) { 1185 clear &= ~list[i].x; 1186 bprintf(bp, "%s!%s", comma, list[i].s); 1187 comma = ","; 1188 } 1189 } 1190 } 1191 1192 1193 /* 1194 * Print the ip address contained in a command. 1195 */ 1196 static void 1197 print_ip(struct buf_pr *bp, const struct format_opts *fo, 1198 const ipfw_insn_ip *cmd) 1199 { 1200 struct hostent *he = NULL; 1201 const struct in_addr *ia; 1202 const uint32_t *a = ((const ipfw_insn_u32 *)cmd)->d; 1203 uint32_t len = F_LEN((const ipfw_insn *)cmd); 1204 char *t; 1205 1206 bprintf(bp, " "); 1207 if (cmd->o.opcode == O_IP_DST_LOOKUP && len > F_INSN_SIZE(ipfw_insn_u32)) { 1208 uint32_t d = a[1]; 1209 const char *arg = "<invalid>"; 1210 1211 if (d < sizeof(lookup_key)/sizeof(lookup_key[0])) 1212 arg = match_value(rule_options, lookup_key[d]); 1213 t = table_search_ctlv(fo->tstate, 1214 ((const ipfw_insn *)cmd)->arg1); 1215 bprintf(bp, "lookup %s %s", arg, t); 1216 return; 1217 } 1218 if (cmd->o.opcode == O_IP_SRC_ME || cmd->o.opcode == O_IP_DST_ME) { 1219 bprintf(bp, "me"); 1220 return; 1221 } 1222 if (cmd->o.opcode == O_IP_SRC_LOOKUP || 1223 cmd->o.opcode == O_IP_DST_LOOKUP) { 1224 t = table_search_ctlv(fo->tstate, 1225 ((const ipfw_insn *)cmd)->arg1); 1226 bprintf(bp, "table(%s", t); 1227 if (len == F_INSN_SIZE(ipfw_insn_u32)) 1228 bprintf(bp, ",%u", *a); 1229 bprintf(bp, ")"); 1230 return; 1231 } 1232 if (cmd->o.opcode == O_IP_SRC_SET || cmd->o.opcode == O_IP_DST_SET) { 1233 const uint32_t *map = (const uint32_t *)&cmd->mask; 1234 struct in_addr addr; 1235 uint32_t x; 1236 int i, j; 1237 char comma = '{'; 1238 1239 x = cmd->o.arg1 - 1; 1240 x = htonl(~x); 1241 addr.s_addr = htonl(cmd->addr.s_addr); 1242 bprintf(bp, "%s/%d", inet_ntoa(addr), 1243 contigmask((uint8_t *)&x, 32)); 1244 x = cmd->addr.s_addr; 1245 x &= 0xff; /* base */ 1246 /* 1247 * Print bits and ranges. 1248 * Locate first bit set (i), then locate first bit unset (j). 1249 * If we have 3+ consecutive bits set, then print them as a 1250 * range, otherwise only print the initial bit and rescan. 1251 */ 1252 for (i=0; i < cmd->o.arg1; i++) 1253 if (map[i/32] & (1<<(i & 31))) { 1254 for (j=i+1; j < cmd->o.arg1; j++) 1255 if (!(map[ j/32] & (1<<(j & 31)))) 1256 break; 1257 bprintf(bp, "%c%d", comma, i+x); 1258 if (j>i+2) { /* range has at least 3 elements */ 1259 bprintf(bp, "-%d", j-1+x); 1260 i = j-1; 1261 } 1262 comma = ','; 1263 } 1264 bprintf(bp, "}"); 1265 return; 1266 } 1267 /* 1268 * len == 2 indicates a single IP, whereas lists of 1 or more 1269 * addr/mask pairs have len = (2n+1). We convert len to n so we 1270 * use that to count the number of entries. 1271 */ 1272 for (len = len / 2; len > 0; len--, a += 2) { 1273 int mb = /* mask length */ 1274 (cmd->o.opcode == O_IP_SRC || cmd->o.opcode == O_IP_DST) ? 1275 32 : contigmask((const uint8_t *)&(a[1]), 32); 1276 if (mb == 32 && g_co.do_resolv) 1277 he = gethostbyaddr((const char *)&(a[0]), sizeof(in_addr_t), 1278 AF_INET); 1279 if (he != NULL) /* resolved to name */ 1280 bprintf(bp, "%s", he->h_name); 1281 else if (mb == 0) /* any */ 1282 bprintf(bp, "any"); 1283 else { /* numeric IP followed by some kind of mask */ 1284 ia = (const struct in_addr *)&a[0]; 1285 bprintf(bp, "%s", inet_ntoa(*ia)); 1286 if (mb < 0) { 1287 ia = (const struct in_addr *)&a[1]; 1288 bprintf(bp, ":%s", inet_ntoa(*ia)); 1289 } else if (mb < 32) 1290 bprintf(bp, "/%d", mb); 1291 } 1292 if (len > 1) 1293 bprintf(bp, ","); 1294 } 1295 } 1296 1297 /* 1298 * prints a MAC address/mask pair 1299 */ 1300 static void 1301 format_mac(struct buf_pr *bp, const uint8_t *addr, const uint8_t *mask) 1302 { 1303 int l = contigmask(mask, 48); 1304 1305 if (l == 0) 1306 bprintf(bp, " any"); 1307 else { 1308 bprintf(bp, " %02x:%02x:%02x:%02x:%02x:%02x", 1309 addr[0], addr[1], addr[2], addr[3], addr[4], addr[5]); 1310 if (l == -1) 1311 bprintf(bp, "&%02x:%02x:%02x:%02x:%02x:%02x", 1312 mask[0], mask[1], mask[2], 1313 mask[3], mask[4], mask[5]); 1314 else if (l < 48) 1315 bprintf(bp, "/%d", l); 1316 } 1317 } 1318 1319 static void 1320 print_mac(struct buf_pr *bp, const ipfw_insn_mac *mac) 1321 { 1322 1323 bprintf(bp, " MAC"); 1324 format_mac(bp, mac->addr, mac->mask); 1325 format_mac(bp, mac->addr + 6, mac->mask + 6); 1326 } 1327 1328 static void 1329 fill_icmptypes(ipfw_insn_u32 *cmd, char *av) 1330 { 1331 uint8_t type; 1332 1333 cmd->d[0] = 0; 1334 while (*av) { 1335 if (*av == ',') 1336 av++; 1337 1338 type = strtoul(av, &av, 0); 1339 1340 if (*av != ',' && *av != '\0') 1341 errx(EX_DATAERR, "invalid ICMP type"); 1342 1343 if (type > 31) 1344 errx(EX_DATAERR, "ICMP type out of range"); 1345 1346 cmd->d[0] |= 1 << type; 1347 } 1348 cmd->o.opcode = O_ICMPTYPE; 1349 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32); 1350 } 1351 1352 static void 1353 print_icmptypes(struct buf_pr *bp, const ipfw_insn_u32 *cmd) 1354 { 1355 int i; 1356 char sep= ' '; 1357 1358 bprintf(bp, " icmptypes"); 1359 for (i = 0; i < 32; i++) { 1360 if ( (cmd->d[0] & (1 << (i))) == 0) 1361 continue; 1362 bprintf(bp, "%c%d", sep, i); 1363 sep = ','; 1364 } 1365 } 1366 1367 static void 1368 print_dscp(struct buf_pr *bp, const ipfw_insn_u32 *cmd) 1369 { 1370 const uint32_t *v; 1371 const char *code; 1372 int i = 0; 1373 char sep= ' '; 1374 1375 bprintf(bp, " dscp"); 1376 v = cmd->d; 1377 while (i < 64) { 1378 if (*v & (1 << i)) { 1379 if ((code = match_value(f_ipdscp, i)) != NULL) 1380 bprintf(bp, "%c%s", sep, code); 1381 else 1382 bprintf(bp, "%c%d", sep, i); 1383 sep = ','; 1384 } 1385 1386 if ((++i % 32) == 0) 1387 v++; 1388 } 1389 } 1390 1391 #define insntod(cmd, type) ((const ipfw_insn_ ## type *)(cmd)) 1392 struct show_state { 1393 struct ip_fw_rule *rule; 1394 const ipfw_insn *eaction; 1395 uint8_t *printed; 1396 int flags; 1397 #define HAVE_PROTO 0x0001 1398 #define HAVE_SRCIP 0x0002 1399 #define HAVE_DSTIP 0x0004 1400 #define HAVE_PROBE_STATE 0x0008 1401 int proto; 1402 int or_block; 1403 }; 1404 1405 static int 1406 init_show_state(struct show_state *state, struct ip_fw_rule *rule) 1407 { 1408 1409 state->printed = calloc(rule->cmd_len, sizeof(uint8_t)); 1410 if (state->printed == NULL) 1411 return (ENOMEM); 1412 state->rule = rule; 1413 state->eaction = NULL; 1414 state->flags = 0; 1415 state->proto = 0; 1416 state->or_block = 0; 1417 return (0); 1418 } 1419 1420 static void 1421 free_show_state(struct show_state *state) 1422 { 1423 1424 free(state->printed); 1425 } 1426 1427 static uint8_t 1428 is_printed_opcode(struct show_state *state, const ipfw_insn *cmd) 1429 { 1430 1431 return (state->printed[cmd - state->rule->cmd]); 1432 } 1433 1434 static void 1435 mark_printed(struct show_state *state, const ipfw_insn *cmd) 1436 { 1437 1438 state->printed[cmd - state->rule->cmd] = 1; 1439 } 1440 1441 static void 1442 print_limit_mask(struct buf_pr *bp, const ipfw_insn_limit *limit) 1443 { 1444 struct _s_x *p = limit_masks; 1445 char const *comma = " "; 1446 uint8_t x; 1447 1448 for (x = limit->limit_mask; p->x != 0; p++) { 1449 if ((x & p->x) == p->x) { 1450 x &= ~p->x; 1451 bprintf(bp, "%s%s", comma, p->s); 1452 comma = ","; 1453 } 1454 } 1455 bprint_uint_arg(bp, " ", limit->conn_limit); 1456 } 1457 1458 static int 1459 print_instruction(struct buf_pr *bp, const struct format_opts *fo, 1460 struct show_state *state, const ipfw_insn *cmd) 1461 { 1462 struct protoent *pe; 1463 struct passwd *pwd; 1464 struct group *grp; 1465 const char *s; 1466 double d; 1467 1468 if (is_printed_opcode(state, cmd)) 1469 return (0); 1470 if ((cmd->len & F_OR) != 0 && state->or_block == 0) 1471 bprintf(bp, " {"); 1472 if (cmd->opcode != O_IN && (cmd->len & F_NOT) != 0) 1473 bprintf(bp, " not"); 1474 1475 switch (cmd->opcode) { 1476 case O_PROB: 1477 d = 1.0 * insntod(cmd, u32)->d[0] / 0x7fffffff; 1478 bprintf(bp, "prob %f ", d); 1479 break; 1480 case O_PROBE_STATE: /* no need to print anything here */ 1481 state->flags |= HAVE_PROBE_STATE; 1482 break; 1483 case O_IP_SRC: 1484 case O_IP_SRC_LOOKUP: 1485 case O_IP_SRC_MASK: 1486 case O_IP_SRC_ME: 1487 case O_IP_SRC_SET: 1488 if (state->flags & HAVE_SRCIP) 1489 bprintf(bp, " src-ip"); 1490 print_ip(bp, fo, insntod(cmd, ip)); 1491 break; 1492 case O_IP_DST: 1493 case O_IP_DST_LOOKUP: 1494 case O_IP_DST_MASK: 1495 case O_IP_DST_ME: 1496 case O_IP_DST_SET: 1497 if (state->flags & HAVE_DSTIP) 1498 bprintf(bp, " dst-ip"); 1499 print_ip(bp, fo, insntod(cmd, ip)); 1500 break; 1501 case O_IP6_SRC: 1502 case O_IP6_SRC_MASK: 1503 case O_IP6_SRC_ME: 1504 if (state->flags & HAVE_SRCIP) 1505 bprintf(bp, " src-ip6"); 1506 print_ip6(bp, insntod(cmd, ip6)); 1507 break; 1508 case O_IP6_DST: 1509 case O_IP6_DST_MASK: 1510 case O_IP6_DST_ME: 1511 if (state->flags & HAVE_DSTIP) 1512 bprintf(bp, " dst-ip6"); 1513 print_ip6(bp, insntod(cmd, ip6)); 1514 break; 1515 case O_FLOW6ID: 1516 print_flow6id(bp, insntod(cmd, u32)); 1517 break; 1518 case O_IP_DSTPORT: 1519 case O_IP_SRCPORT: 1520 print_newports(bp, insntod(cmd, u16), state->proto, 1521 (state->flags & (HAVE_SRCIP | HAVE_DSTIP)) == 1522 (HAVE_SRCIP | HAVE_DSTIP) ? cmd->opcode: 0); 1523 break; 1524 case O_PROTO: 1525 pe = getprotobynumber(cmd->arg1); 1526 if (state->flags & HAVE_PROTO) 1527 bprintf(bp, " proto"); 1528 if (pe != NULL) 1529 bprintf(bp, " %s", pe->p_name); 1530 else 1531 bprintf(bp, " %u", cmd->arg1); 1532 state->proto = cmd->arg1; 1533 break; 1534 case O_MACADDR2: 1535 print_mac(bp, insntod(cmd, mac)); 1536 break; 1537 case O_MAC_TYPE: 1538 print_newports(bp, insntod(cmd, u16), 1539 IPPROTO_ETHERTYPE, cmd->opcode); 1540 break; 1541 case O_FRAG: 1542 print_flags(bp, "frag", cmd, f_ipoff); 1543 break; 1544 case O_FIB: 1545 bprintf(bp, " fib %u", cmd->arg1); 1546 break; 1547 case O_SOCKARG: 1548 bprintf(bp, " sockarg"); 1549 break; 1550 case O_IN: 1551 bprintf(bp, cmd->len & F_NOT ? " out" : " in"); 1552 break; 1553 case O_DIVERTED: 1554 switch (cmd->arg1) { 1555 case 3: 1556 bprintf(bp, " diverted"); 1557 break; 1558 case 2: 1559 bprintf(bp, " diverted-output"); 1560 break; 1561 case 1: 1562 bprintf(bp, " diverted-loopback"); 1563 break; 1564 default: 1565 bprintf(bp, " diverted-?<%u>", cmd->arg1); 1566 break; 1567 } 1568 break; 1569 case O_LAYER2: 1570 bprintf(bp, " layer2"); 1571 break; 1572 case O_XMIT: 1573 case O_RECV: 1574 case O_VIA: 1575 if (cmd->opcode == O_XMIT) 1576 s = "xmit"; 1577 else if (cmd->opcode == O_RECV) 1578 s = "recv"; 1579 else /* if (cmd->opcode == O_VIA) */ 1580 s = "via"; 1581 switch (insntod(cmd, if)->name[0]) { 1582 case '\0': 1583 bprintf(bp, " %s %s", s, 1584 inet_ntoa(insntod(cmd, if)->p.ip)); 1585 break; 1586 case '\1': 1587 bprintf(bp, " %s table(%s)", s, 1588 table_search_ctlv(fo->tstate, 1589 insntod(cmd, if)->p.kidx)); 1590 break; 1591 default: 1592 bprintf(bp, " %s %s", s, 1593 insntod(cmd, if)->name); 1594 } 1595 break; 1596 case O_IP_FLOW_LOOKUP: 1597 s = table_search_ctlv(fo->tstate, cmd->arg1); 1598 bprintf(bp, " flow table(%s", s); 1599 if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_u32)) 1600 bprintf(bp, ",%u", insntod(cmd, u32)->d[0]); 1601 bprintf(bp, ")"); 1602 break; 1603 case O_IPID: 1604 case O_IPTTL: 1605 case O_IPLEN: 1606 case O_TCPDATALEN: 1607 case O_TCPMSS: 1608 case O_TCPWIN: 1609 if (F_LEN(cmd) == 1) { 1610 switch (cmd->opcode) { 1611 case O_IPID: 1612 s = "ipid"; 1613 break; 1614 case O_IPTTL: 1615 s = "ipttl"; 1616 break; 1617 case O_IPLEN: 1618 s = "iplen"; 1619 break; 1620 case O_TCPDATALEN: 1621 s = "tcpdatalen"; 1622 break; 1623 case O_TCPMSS: 1624 s = "tcpmss"; 1625 break; 1626 case O_TCPWIN: 1627 s = "tcpwin"; 1628 break; 1629 default: 1630 s = "<unknown>"; 1631 break; 1632 } 1633 bprintf(bp, " %s %u", s, cmd->arg1); 1634 } else 1635 print_newports(bp, insntod(cmd, u16), 0, 1636 cmd->opcode); 1637 break; 1638 case O_IPVER: 1639 bprintf(bp, " ipver %u", cmd->arg1); 1640 break; 1641 case O_IPPRECEDENCE: 1642 bprintf(bp, " ipprecedence %u", cmd->arg1 >> 5); 1643 break; 1644 case O_DSCP: 1645 print_dscp(bp, insntod(cmd, u32)); 1646 break; 1647 case O_IPOPT: 1648 print_flags(bp, "ipoptions", cmd, f_ipopts); 1649 break; 1650 case O_IPTOS: 1651 print_flags(bp, "iptos", cmd, f_iptos); 1652 break; 1653 case O_ICMPTYPE: 1654 print_icmptypes(bp, insntod(cmd, u32)); 1655 break; 1656 case O_ESTAB: 1657 bprintf(bp, " established"); 1658 break; 1659 case O_TCPFLAGS: 1660 print_flags(bp, "tcpflags", cmd, f_tcpflags); 1661 break; 1662 case O_TCPOPTS: 1663 print_flags(bp, "tcpoptions", cmd, f_tcpopts); 1664 break; 1665 case O_TCPACK: 1666 bprintf(bp, " tcpack %d", 1667 ntohl(insntod(cmd, u32)->d[0])); 1668 break; 1669 case O_TCPSEQ: 1670 bprintf(bp, " tcpseq %d", 1671 ntohl(insntod(cmd, u32)->d[0])); 1672 break; 1673 case O_UID: 1674 pwd = getpwuid(insntod(cmd, u32)->d[0]); 1675 if (pwd != NULL) 1676 bprintf(bp, " uid %s", pwd->pw_name); 1677 else 1678 bprintf(bp, " uid %u", 1679 insntod(cmd, u32)->d[0]); 1680 break; 1681 case O_GID: 1682 grp = getgrgid(insntod(cmd, u32)->d[0]); 1683 if (grp != NULL) 1684 bprintf(bp, " gid %s", grp->gr_name); 1685 else 1686 bprintf(bp, " gid %u", 1687 insntod(cmd, u32)->d[0]); 1688 break; 1689 case O_JAIL: 1690 bprintf(bp, " jail %d", insntod(cmd, u32)->d[0]); 1691 break; 1692 case O_VERREVPATH: 1693 bprintf(bp, " verrevpath"); 1694 break; 1695 case O_VERSRCREACH: 1696 bprintf(bp, " versrcreach"); 1697 break; 1698 case O_ANTISPOOF: 1699 bprintf(bp, " antispoof"); 1700 break; 1701 case O_IPSEC: 1702 bprintf(bp, " ipsec"); 1703 break; 1704 case O_NOP: 1705 bprintf(bp, " // %s", (const char *)(cmd + 1)); 1706 break; 1707 case O_KEEP_STATE: 1708 if (state->flags & HAVE_PROBE_STATE) 1709 bprintf(bp, " keep-state"); 1710 else 1711 bprintf(bp, " record-state"); 1712 bprintf(bp, " :%s", 1713 object_search_ctlv(fo->tstate, cmd->arg1, 1714 IPFW_TLV_STATE_NAME)); 1715 break; 1716 case O_LIMIT: 1717 if (state->flags & HAVE_PROBE_STATE) 1718 bprintf(bp, " limit"); 1719 else 1720 bprintf(bp, " set-limit"); 1721 print_limit_mask(bp, insntod(cmd, limit)); 1722 bprintf(bp, " :%s", 1723 object_search_ctlv(fo->tstate, cmd->arg1, 1724 IPFW_TLV_STATE_NAME)); 1725 break; 1726 case O_IP6: 1727 if (state->flags & HAVE_PROTO) 1728 bprintf(bp, " proto"); 1729 bprintf(bp, " ip6"); 1730 break; 1731 case O_IP4: 1732 if (state->flags & HAVE_PROTO) 1733 bprintf(bp, " proto"); 1734 bprintf(bp, " ip4"); 1735 break; 1736 case O_ICMP6TYPE: 1737 print_icmp6types(bp, insntod(cmd, u32)); 1738 break; 1739 case O_EXT_HDR: 1740 print_ext6hdr(bp, cmd); 1741 break; 1742 case O_TAGGED: 1743 if (F_LEN(cmd) == 1) 1744 bprint_uint_arg(bp, " tagged ", cmd->arg1); 1745 else 1746 print_newports(bp, insntod(cmd, u16), 1747 0, O_TAGGED); 1748 break; 1749 case O_SKIP_ACTION: 1750 bprintf(bp, " defer-immediate-action"); 1751 break; 1752 default: 1753 bprintf(bp, " [opcode %d len %d]", cmd->opcode, 1754 cmd->len); 1755 } 1756 if (cmd->len & F_OR) { 1757 bprintf(bp, " or"); 1758 state->or_block = 1; 1759 } else if (state->or_block != 0) { 1760 bprintf(bp, " }"); 1761 state->or_block = 0; 1762 } 1763 mark_printed(state, cmd); 1764 1765 return (1); 1766 } 1767 1768 static ipfw_insn * 1769 print_opcode(struct buf_pr *bp, struct format_opts *fo, 1770 struct show_state *state, int opcode) 1771 { 1772 ipfw_insn *cmd; 1773 int l; 1774 1775 for (l = state->rule->act_ofs, cmd = state->rule->cmd; 1776 l > 0; l -= F_LEN(cmd), cmd += F_LEN(cmd)) { 1777 /* We use zero opcode to print the rest of options */ 1778 if (opcode >= 0 && cmd->opcode != opcode) 1779 continue; 1780 /* 1781 * Skip O_NOP, when we printing the rest 1782 * of options, it will be handled separately. 1783 */ 1784 if (cmd->opcode == O_NOP && opcode != O_NOP) 1785 continue; 1786 if (!print_instruction(bp, fo, state, cmd)) 1787 continue; 1788 return (cmd); 1789 } 1790 return (NULL); 1791 } 1792 1793 static void 1794 print_fwd(struct buf_pr *bp, const ipfw_insn *cmd) 1795 { 1796 char buf[INET6_ADDRSTRLEN + IF_NAMESIZE + 2]; 1797 const ipfw_insn_sa6 *sa6; 1798 const ipfw_insn_sa *sa; 1799 uint16_t port; 1800 1801 if (cmd->opcode == O_FORWARD_IP) { 1802 sa = insntod(cmd, sa); 1803 port = sa->sa.sin_port; 1804 if (sa->sa.sin_addr.s_addr == INADDR_ANY) 1805 bprintf(bp, "fwd tablearg"); 1806 else 1807 bprintf(bp, "fwd %s", inet_ntoa(sa->sa.sin_addr)); 1808 } else { 1809 sa6 = insntod(cmd, sa6); 1810 port = sa6->sa.sin6_port; 1811 bprintf(bp, "fwd "); 1812 if (getnameinfo((const struct sockaddr *)&sa6->sa, 1813 sizeof(struct sockaddr_in6), buf, sizeof(buf), NULL, 0, 1814 NI_NUMERICHOST) == 0) 1815 bprintf(bp, "%s", buf); 1816 } 1817 if (port != 0) 1818 bprintf(bp, ",%u", port); 1819 } 1820 1821 static int 1822 print_action_instruction(struct buf_pr *bp, const struct format_opts *fo, 1823 struct show_state *state, const ipfw_insn *cmd) 1824 { 1825 const char *s; 1826 1827 if (is_printed_opcode(state, cmd)) 1828 return (0); 1829 switch (cmd->opcode) { 1830 case O_CHECK_STATE: 1831 bprintf(bp, "check-state"); 1832 if (cmd->arg1 != 0) 1833 s = object_search_ctlv(fo->tstate, cmd->arg1, 1834 IPFW_TLV_STATE_NAME); 1835 else 1836 s = NULL; 1837 bprintf(bp, " :%s", s ? s: "any"); 1838 break; 1839 case O_ACCEPT: 1840 bprintf(bp, "allow"); 1841 break; 1842 case O_COUNT: 1843 bprintf(bp, "count"); 1844 break; 1845 case O_DENY: 1846 bprintf(bp, "deny"); 1847 break; 1848 case O_REJECT: 1849 if (cmd->arg1 == ICMP_REJECT_RST) 1850 bprintf(bp, "reset"); 1851 else if (cmd->arg1 == ICMP_REJECT_ABORT) 1852 bprintf(bp, "abort"); 1853 else if (cmd->arg1 == ICMP_UNREACH_HOST) 1854 bprintf(bp, "reject"); 1855 else 1856 print_reject_code(bp, cmd->arg1); 1857 break; 1858 case O_UNREACH6: 1859 if (cmd->arg1 == ICMP6_UNREACH_RST) 1860 bprintf(bp, "reset6"); 1861 else if (cmd->arg1 == ICMP6_UNREACH_ABORT) 1862 bprintf(bp, "abort6"); 1863 else 1864 print_unreach6_code(bp, cmd->arg1); 1865 break; 1866 case O_SKIPTO: 1867 bprint_uint_arg(bp, "skipto ", cmd->arg1); 1868 break; 1869 case O_PIPE: 1870 bprint_uint_arg(bp, "pipe ", cmd->arg1); 1871 break; 1872 case O_QUEUE: 1873 bprint_uint_arg(bp, "queue ", cmd->arg1); 1874 break; 1875 case O_DIVERT: 1876 bprint_uint_arg(bp, "divert ", cmd->arg1); 1877 break; 1878 case O_TEE: 1879 bprint_uint_arg(bp, "tee ", cmd->arg1); 1880 break; 1881 case O_NETGRAPH: 1882 bprint_uint_arg(bp, "netgraph ", cmd->arg1); 1883 break; 1884 case O_NGTEE: 1885 bprint_uint_arg(bp, "ngtee ", cmd->arg1); 1886 break; 1887 case O_FORWARD_IP: 1888 case O_FORWARD_IP6: 1889 print_fwd(bp, cmd); 1890 break; 1891 case O_LOG: 1892 if (insntod(cmd, log)->max_log > 0) 1893 bprintf(bp, " log logamount %d", 1894 insntod(cmd, log)->max_log); 1895 else 1896 bprintf(bp, " log"); 1897 break; 1898 case O_ALTQ: 1899 #ifndef NO_ALTQ 1900 print_altq_cmd(bp, insntod(cmd, altq)); 1901 #endif 1902 break; 1903 case O_TAG: 1904 bprint_uint_arg(bp, cmd->len & F_NOT ? " untag ": 1905 " tag ", cmd->arg1); 1906 break; 1907 case O_NAT: 1908 if (cmd->arg1 != IP_FW_NAT44_GLOBAL) 1909 bprint_uint_arg(bp, "nat ", cmd->arg1); 1910 else 1911 bprintf(bp, "nat global"); 1912 break; 1913 case O_SETFIB: 1914 if (cmd->arg1 == IP_FW_TARG) 1915 bprint_uint_arg(bp, "setfib ", cmd->arg1); 1916 else 1917 bprintf(bp, "setfib %u", cmd->arg1 & 0x7FFF); 1918 break; 1919 case O_EXTERNAL_ACTION: 1920 /* 1921 * The external action can consists of two following 1922 * each other opcodes - O_EXTERNAL_ACTION and 1923 * O_EXTERNAL_INSTANCE. The first contains the ID of 1924 * name of external action. The second contains the ID 1925 * of name of external action instance. 1926 * NOTE: in case when external action has no named 1927 * instances support, the second opcode isn't needed. 1928 */ 1929 state->eaction = cmd; 1930 s = object_search_ctlv(fo->tstate, cmd->arg1, 1931 IPFW_TLV_EACTION); 1932 if (match_token(rule_eactions, s) != -1) 1933 bprintf(bp, "%s", s); 1934 else 1935 bprintf(bp, "eaction %s", s); 1936 break; 1937 case O_EXTERNAL_INSTANCE: 1938 if (state->eaction == NULL) 1939 break; 1940 /* 1941 * XXX: we need to teach ipfw(9) to rewrite opcodes 1942 * in the user buffer on rule addition. When we add 1943 * the rule, we specify zero TLV type for 1944 * O_EXTERNAL_INSTANCE object. To show correct 1945 * rule after `ipfw add` we need to search instance 1946 * name with zero type. But when we do `ipfw show` 1947 * we calculate TLV type using IPFW_TLV_EACTION_NAME() 1948 * macro. 1949 */ 1950 s = object_search_ctlv(fo->tstate, cmd->arg1, 0); 1951 if (s == NULL) 1952 s = object_search_ctlv(fo->tstate, 1953 cmd->arg1, IPFW_TLV_EACTION_NAME( 1954 state->eaction->arg1)); 1955 bprintf(bp, " %s", s); 1956 break; 1957 case O_EXTERNAL_DATA: 1958 if (state->eaction == NULL) 1959 break; 1960 /* 1961 * Currently we support data formatting only for 1962 * external data with datalen u16. For unknown data 1963 * print its size in bytes. 1964 */ 1965 if (cmd->len == F_INSN_SIZE(ipfw_insn)) 1966 bprintf(bp, " %u", cmd->arg1); 1967 else 1968 bprintf(bp, " %ubytes", 1969 cmd->len * sizeof(uint32_t)); 1970 break; 1971 case O_SETDSCP: 1972 if (cmd->arg1 == IP_FW_TARG) { 1973 bprintf(bp, "setdscp tablearg"); 1974 break; 1975 } 1976 s = match_value(f_ipdscp, cmd->arg1 & 0x3F); 1977 if (s != NULL) 1978 bprintf(bp, "setdscp %s", s); 1979 else 1980 bprintf(bp, "setdscp %u", cmd->arg1 & 0x3F); 1981 break; 1982 case O_REASS: 1983 bprintf(bp, "reass"); 1984 break; 1985 case O_CALLRETURN: 1986 if (cmd->len & F_NOT) 1987 bprintf(bp, "return"); 1988 else 1989 bprint_uint_arg(bp, "call ", cmd->arg1); 1990 break; 1991 default: 1992 bprintf(bp, "** unrecognized action %d len %d ", 1993 cmd->opcode, cmd->len); 1994 } 1995 mark_printed(state, cmd); 1996 1997 return (1); 1998 } 1999 2000 2001 static ipfw_insn * 2002 print_action(struct buf_pr *bp, struct format_opts *fo, 2003 struct show_state *state, uint8_t opcode) 2004 { 2005 ipfw_insn *cmd; 2006 int l; 2007 2008 for (l = state->rule->cmd_len - state->rule->act_ofs, 2009 cmd = ACTION_PTR(state->rule); l > 0; 2010 l -= F_LEN(cmd), cmd += F_LEN(cmd)) { 2011 if (cmd->opcode != opcode) 2012 continue; 2013 if (!print_action_instruction(bp, fo, state, cmd)) 2014 continue; 2015 return (cmd); 2016 } 2017 return (NULL); 2018 } 2019 2020 static void 2021 print_proto(struct buf_pr *bp, struct format_opts *fo, 2022 struct show_state *state) 2023 { 2024 ipfw_insn *cmd; 2025 int l, proto, ip4, ip6; 2026 2027 /* Count all O_PROTO, O_IP4, O_IP6 instructions. */ 2028 proto = ip4 = ip6 = 0; 2029 for (l = state->rule->act_ofs, cmd = state->rule->cmd; 2030 l > 0; l -= F_LEN(cmd), cmd += F_LEN(cmd)) { 2031 switch (cmd->opcode) { 2032 case O_PROTO: 2033 proto++; 2034 break; 2035 case O_IP4: 2036 ip4 = 1; 2037 if (cmd->len & F_OR) 2038 ip4++; 2039 break; 2040 case O_IP6: 2041 ip6 = 1; 2042 if (cmd->len & F_OR) 2043 ip6++; 2044 break; 2045 default: 2046 continue; 2047 } 2048 } 2049 if (proto == 0 && ip4 == 0 && ip6 == 0) { 2050 state->proto = IPPROTO_IP; 2051 state->flags |= HAVE_PROTO; 2052 bprintf(bp, " ip"); 2053 return; 2054 } 2055 /* To handle the case { ip4 or ip6 }, print opcode with F_OR first */ 2056 cmd = NULL; 2057 if (ip4 || ip6) 2058 cmd = print_opcode(bp, fo, state, ip4 > ip6 ? O_IP4: O_IP6); 2059 if (cmd != NULL && (cmd->len & F_OR)) 2060 cmd = print_opcode(bp, fo, state, ip4 > ip6 ? O_IP6: O_IP4); 2061 if (cmd == NULL || (cmd->len & F_OR)) 2062 for (l = proto; l > 0; l--) { 2063 cmd = print_opcode(bp, fo, state, O_PROTO); 2064 if (cmd == NULL || (cmd->len & F_OR) == 0) 2065 break; 2066 } 2067 /* Initialize proto, it is used by print_newports() */ 2068 state->flags |= HAVE_PROTO; 2069 if (state->proto == 0 && ip6 != 0) 2070 state->proto = IPPROTO_IPV6; 2071 } 2072 2073 static int 2074 match_opcode(int opcode, const int opcodes[], size_t nops) 2075 { 2076 size_t i; 2077 2078 for (i = 0; i < nops; i++) 2079 if (opcode == opcodes[i]) 2080 return (1); 2081 return (0); 2082 } 2083 2084 static void 2085 print_address(struct buf_pr *bp, struct format_opts *fo, 2086 struct show_state *state, const int opcodes[], size_t nops, int portop, 2087 int flag) 2088 { 2089 ipfw_insn *cmd; 2090 int count, l, portcnt, pf; 2091 2092 count = portcnt = 0; 2093 for (l = state->rule->act_ofs, cmd = state->rule->cmd; 2094 l > 0; l -= F_LEN(cmd), cmd += F_LEN(cmd)) { 2095 if (match_opcode(cmd->opcode, opcodes, nops)) 2096 count++; 2097 else if (cmd->opcode == portop) 2098 portcnt++; 2099 } 2100 if (count == 0) 2101 bprintf(bp, " any"); 2102 for (l = state->rule->act_ofs, cmd = state->rule->cmd; 2103 l > 0 && count > 0; l -= F_LEN(cmd), cmd += F_LEN(cmd)) { 2104 if (!match_opcode(cmd->opcode, opcodes, nops)) 2105 continue; 2106 print_instruction(bp, fo, state, cmd); 2107 if ((cmd->len & F_OR) == 0) 2108 break; 2109 count--; 2110 } 2111 /* 2112 * If several O_IP_?PORT opcodes specified, leave them to the 2113 * options section. 2114 */ 2115 if (portcnt == 1) { 2116 for (l = state->rule->act_ofs, cmd = state->rule->cmd, pf = 0; 2117 l > 0; l -= F_LEN(cmd), cmd += F_LEN(cmd)) { 2118 if (cmd->opcode != portop) { 2119 pf = (cmd->len & F_OR); 2120 continue; 2121 } 2122 /* Print opcode iff it is not in OR block. */ 2123 if (pf == 0 && (cmd->len & F_OR) == 0) 2124 print_instruction(bp, fo, state, cmd); 2125 break; 2126 } 2127 } 2128 state->flags |= flag; 2129 } 2130 2131 static const int action_opcodes[] = { 2132 O_CHECK_STATE, O_ACCEPT, O_COUNT, O_DENY, O_REJECT, 2133 O_UNREACH6, O_SKIPTO, O_PIPE, O_QUEUE, O_DIVERT, O_TEE, 2134 O_NETGRAPH, O_NGTEE, O_FORWARD_IP, O_FORWARD_IP6, O_NAT, 2135 O_SETFIB, O_SETDSCP, O_REASS, O_CALLRETURN, 2136 /* keep the following opcodes at the end of the list */ 2137 O_EXTERNAL_ACTION, O_EXTERNAL_INSTANCE, O_EXTERNAL_DATA 2138 }; 2139 2140 static const int modifier_opcodes[] = { 2141 O_LOG, O_ALTQ, O_TAG 2142 }; 2143 2144 static const int src_opcodes[] = { 2145 O_IP_SRC, O_IP_SRC_LOOKUP, O_IP_SRC_MASK, O_IP_SRC_ME, 2146 O_IP_SRC_SET, O_IP6_SRC, O_IP6_SRC_MASK, O_IP6_SRC_ME 2147 }; 2148 2149 static const int dst_opcodes[] = { 2150 O_IP_DST, O_IP_DST_LOOKUP, O_IP_DST_MASK, O_IP_DST_ME, 2151 O_IP_DST_SET, O_IP6_DST, O_IP6_DST_MASK, O_IP6_DST_ME 2152 }; 2153 2154 static void 2155 show_static_rule(struct cmdline_opts *co, struct format_opts *fo, 2156 struct buf_pr *bp, struct ip_fw_rule *rule, struct ip_fw_bcounter *cntr) 2157 { 2158 static int twidth = 0; 2159 struct show_state state; 2160 ipfw_insn *cmd; 2161 size_t i; 2162 2163 /* Print # DISABLED or skip the rule */ 2164 if ((fo->set_mask & (1 << rule->set)) == 0) { 2165 /* disabled mask */ 2166 if (!co->show_sets) 2167 return; 2168 else 2169 bprintf(bp, "# DISABLED "); 2170 } 2171 if (init_show_state(&state, rule) != 0) { 2172 warn("init_show_state() failed"); 2173 return; 2174 } 2175 bprintf(bp, "%05u ", rule->rulenum); 2176 2177 /* only if counters are available */ 2178 if (cntr != NULL) { 2179 /* Print counters if enabled */ 2180 if (fo->pcwidth > 0 || fo->bcwidth > 0) { 2181 pr_u64(bp, &cntr->pcnt, fo->pcwidth); 2182 pr_u64(bp, &cntr->bcnt, fo->bcwidth); 2183 } 2184 2185 /* Print timestamp */ 2186 if (co->do_time == TIMESTAMP_NUMERIC) 2187 bprintf(bp, "%10u ", cntr->timestamp); 2188 else if (co->do_time == TIMESTAMP_STRING) { 2189 char timestr[30]; 2190 time_t t = (time_t)0; 2191 2192 if (twidth == 0) { 2193 strcpy(timestr, ctime(&t)); 2194 *strchr(timestr, '\n') = '\0'; 2195 twidth = strlen(timestr); 2196 } 2197 if (cntr->timestamp > 0) { 2198 t = _long_to_time(cntr->timestamp); 2199 2200 strcpy(timestr, ctime(&t)); 2201 *strchr(timestr, '\n') = '\0'; 2202 bprintf(bp, "%s ", timestr); 2203 } else { 2204 bprintf(bp, "%*s ", twidth, ""); 2205 } 2206 } 2207 } 2208 2209 /* Print set number */ 2210 if (co->show_sets) 2211 bprintf(bp, "set %d ", rule->set); 2212 2213 /* Print the optional "match probability" */ 2214 cmd = print_opcode(bp, fo, &state, O_PROB); 2215 /* Print rule action */ 2216 for (i = 0; i < nitems(action_opcodes); i++) { 2217 cmd = print_action(bp, fo, &state, action_opcodes[i]); 2218 if (cmd == NULL) 2219 continue; 2220 /* Handle special cases */ 2221 switch (cmd->opcode) { 2222 case O_CHECK_STATE: 2223 goto end; 2224 case O_EXTERNAL_ACTION: 2225 case O_EXTERNAL_INSTANCE: 2226 /* External action can have several instructions */ 2227 continue; 2228 } 2229 break; 2230 } 2231 /* Print rule modifiers */ 2232 for (i = 0; i < nitems(modifier_opcodes); i++) 2233 print_action(bp, fo, &state, modifier_opcodes[i]); 2234 /* 2235 * Print rule body 2236 */ 2237 if (co->comment_only != 0) 2238 goto end; 2239 2240 if (rule->flags & IPFW_RULE_JUSTOPTS) { 2241 state.flags |= HAVE_PROTO | HAVE_SRCIP | HAVE_DSTIP; 2242 goto justopts; 2243 } 2244 2245 print_proto(bp, fo, &state); 2246 if (co->do_compact != 0 && (rule->flags & IPFW_RULE_NOOPT)) 2247 goto justopts; 2248 2249 /* Print source */ 2250 bprintf(bp, " from"); 2251 print_address(bp, fo, &state, src_opcodes, nitems(src_opcodes), 2252 O_IP_SRCPORT, HAVE_SRCIP); 2253 2254 /* Print destination */ 2255 bprintf(bp, " to"); 2256 print_address(bp, fo, &state, dst_opcodes, nitems(dst_opcodes), 2257 O_IP_DSTPORT, HAVE_DSTIP); 2258 2259 justopts: 2260 /* Print the rest of options */ 2261 while (print_opcode(bp, fo, &state, -1)) 2262 ; 2263 end: 2264 /* Print comment at the end */ 2265 cmd = print_opcode(bp, fo, &state, O_NOP); 2266 if (co->comment_only != 0 && cmd == NULL) 2267 bprintf(bp, " // ..."); 2268 bprintf(bp, "\n"); 2269 free_show_state(&state); 2270 } 2271 2272 static void 2273 show_dyn_state(struct cmdline_opts *co, struct format_opts *fo, 2274 struct buf_pr *bp, ipfw_dyn_rule *d) 2275 { 2276 struct protoent *pe; 2277 struct in_addr a; 2278 uint16_t rulenum; 2279 char buf[INET6_ADDRSTRLEN]; 2280 2281 if (d->expire == 0 && d->dyn_type != O_LIMIT_PARENT) 2282 return; 2283 2284 bcopy(&d->rule, &rulenum, sizeof(rulenum)); 2285 bprintf(bp, "%05d", rulenum); 2286 if (fo->pcwidth > 0 || fo->bcwidth > 0) { 2287 bprintf(bp, " "); 2288 pr_u64(bp, &d->pcnt, fo->pcwidth); 2289 pr_u64(bp, &d->bcnt, fo->bcwidth); 2290 bprintf(bp, "(%ds)", d->expire); 2291 } 2292 switch (d->dyn_type) { 2293 case O_LIMIT_PARENT: 2294 bprintf(bp, " PARENT %d", d->count); 2295 break; 2296 case O_LIMIT: 2297 bprintf(bp, " LIMIT"); 2298 break; 2299 case O_KEEP_STATE: /* bidir, no mask */ 2300 bprintf(bp, " STATE"); 2301 break; 2302 } 2303 2304 if ((pe = getprotobynumber(d->id.proto)) != NULL) 2305 bprintf(bp, " %s", pe->p_name); 2306 else 2307 bprintf(bp, " proto %u", d->id.proto); 2308 2309 if (d->id.addr_type == 4) { 2310 a.s_addr = htonl(d->id.src_ip); 2311 bprintf(bp, " %s %d", inet_ntoa(a), d->id.src_port); 2312 2313 a.s_addr = htonl(d->id.dst_ip); 2314 bprintf(bp, " <-> %s %d", inet_ntoa(a), d->id.dst_port); 2315 } else if (d->id.addr_type == 6) { 2316 bprintf(bp, " %s %d", inet_ntop(AF_INET6, &d->id.src_ip6, buf, 2317 sizeof(buf)), d->id.src_port); 2318 bprintf(bp, " <-> %s %d", inet_ntop(AF_INET6, &d->id.dst_ip6, 2319 buf, sizeof(buf)), d->id.dst_port); 2320 } else 2321 bprintf(bp, " UNKNOWN <-> UNKNOWN"); 2322 if (d->kidx != 0) 2323 bprintf(bp, " :%s", object_search_ctlv(fo->tstate, 2324 d->kidx, IPFW_TLV_STATE_NAME)); 2325 2326 #define BOTH_SYN (TH_SYN | (TH_SYN << 8)) 2327 #define BOTH_FIN (TH_FIN | (TH_FIN << 8)) 2328 if (co->verbose) { 2329 bprintf(bp, " state 0x%08x%s", d->state, 2330 d->state ? " ": ","); 2331 if (d->state & IPFW_DYN_ORPHANED) 2332 bprintf(bp, "ORPHANED,"); 2333 if ((d->state & BOTH_SYN) == BOTH_SYN) 2334 bprintf(bp, "BOTH_SYN,"); 2335 else { 2336 if (d->state & TH_SYN) 2337 bprintf(bp, "F_SYN,"); 2338 if (d->state & (TH_SYN << 8)) 2339 bprintf(bp, "R_SYN,"); 2340 } 2341 if ((d->state & BOTH_FIN) == BOTH_FIN) 2342 bprintf(bp, "BOTH_FIN,"); 2343 else { 2344 if (d->state & TH_FIN) 2345 bprintf(bp, "F_FIN,"); 2346 if (d->state & (TH_FIN << 8)) 2347 bprintf(bp, "R_FIN,"); 2348 } 2349 bprintf(bp, " f_ack 0x%x, r_ack 0x%x", d->ack_fwd, 2350 d->ack_rev); 2351 } 2352 } 2353 2354 static int 2355 do_range_cmd(int cmd, ipfw_range_tlv *rt) 2356 { 2357 ipfw_range_header rh; 2358 size_t sz; 2359 2360 memset(&rh, 0, sizeof(rh)); 2361 memcpy(&rh.range, rt, sizeof(*rt)); 2362 rh.range.head.length = sizeof(*rt); 2363 rh.range.head.type = IPFW_TLV_RANGE; 2364 sz = sizeof(rh); 2365 2366 if (do_get3(cmd, &rh.opheader, &sz) != 0) 2367 return (-1); 2368 /* Save number of matched objects */ 2369 rt->new_set = rh.range.new_set; 2370 return (0); 2371 } 2372 2373 /* 2374 * This one handles all set-related commands 2375 * ipfw set { show | enable | disable } 2376 * ipfw set swap X Y 2377 * ipfw set move X to Y 2378 * ipfw set move rule X to Y 2379 */ 2380 void 2381 ipfw_sets_handler(char *av[]) 2382 { 2383 ipfw_range_tlv rt; 2384 const char *msg; 2385 size_t size; 2386 uint32_t masks[2]; 2387 int i; 2388 uint16_t rulenum; 2389 uint8_t cmd; 2390 2391 av++; 2392 memset(&rt, 0, sizeof(rt)); 2393 2394 if (av[0] == NULL) 2395 errx(EX_USAGE, "set needs command"); 2396 if (_substrcmp(*av, "show") == 0) { 2397 struct format_opts fo; 2398 ipfw_cfg_lheader *cfg; 2399 2400 memset(&fo, 0, sizeof(fo)); 2401 if (ipfw_get_config(&g_co, &fo, &cfg, &size) != 0) 2402 err(EX_OSERR, "requesting config failed"); 2403 2404 for (i = 0, msg = "disable"; i < RESVD_SET; i++) 2405 if ((cfg->set_mask & (1<<i)) == 0) { 2406 printf("%s %d", msg, i); 2407 msg = ""; 2408 } 2409 msg = (cfg->set_mask != (uint32_t)-1) ? " enable" : "enable"; 2410 for (i = 0; i < RESVD_SET; i++) 2411 if ((cfg->set_mask & (1<<i)) != 0) { 2412 printf("%s %d", msg, i); 2413 msg = ""; 2414 } 2415 printf("\n"); 2416 free(cfg); 2417 } else if (_substrcmp(*av, "swap") == 0) { 2418 av++; 2419 if ( av[0] == NULL || av[1] == NULL ) 2420 errx(EX_USAGE, "set swap needs 2 set numbers\n"); 2421 rt.set = atoi(av[0]); 2422 rt.new_set = atoi(av[1]); 2423 if (!isdigit(*(av[0])) || rt.set > RESVD_SET) 2424 errx(EX_DATAERR, "invalid set number %s\n", av[0]); 2425 if (!isdigit(*(av[1])) || rt.new_set > RESVD_SET) 2426 errx(EX_DATAERR, "invalid set number %s\n", av[1]); 2427 i = do_range_cmd(IP_FW_SET_SWAP, &rt); 2428 } else if (_substrcmp(*av, "move") == 0) { 2429 av++; 2430 if (av[0] && _substrcmp(*av, "rule") == 0) { 2431 rt.flags = IPFW_RCFLAG_RANGE; /* move rules to new set */ 2432 cmd = IP_FW_XMOVE; 2433 av++; 2434 } else 2435 cmd = IP_FW_SET_MOVE; /* Move set to new one */ 2436 if (av[0] == NULL || av[1] == NULL || av[2] == NULL || 2437 av[3] != NULL || _substrcmp(av[1], "to") != 0) 2438 errx(EX_USAGE, "syntax: set move [rule] X to Y\n"); 2439 rulenum = atoi(av[0]); 2440 rt.new_set = atoi(av[2]); 2441 if (cmd == IP_FW_XMOVE) { 2442 rt.start_rule = rulenum; 2443 rt.end_rule = rulenum; 2444 } else 2445 rt.set = rulenum; 2446 rt.new_set = atoi(av[2]); 2447 if (!isdigit(*(av[0])) || (cmd == 3 && rt.set > RESVD_SET) || 2448 (cmd == 2 && rt.start_rule == IPFW_DEFAULT_RULE) ) 2449 errx(EX_DATAERR, "invalid source number %s\n", av[0]); 2450 if (!isdigit(*(av[2])) || rt.new_set > RESVD_SET) 2451 errx(EX_DATAERR, "invalid dest. set %s\n", av[1]); 2452 i = do_range_cmd(cmd, &rt); 2453 if (i < 0) 2454 err(EX_OSERR, "failed to move %s", 2455 cmd == IP_FW_SET_MOVE ? "set": "rule"); 2456 } else if (_substrcmp(*av, "disable") == 0 || 2457 _substrcmp(*av, "enable") == 0 ) { 2458 int which = _substrcmp(*av, "enable") == 0 ? 1 : 0; 2459 2460 av++; 2461 masks[0] = masks[1] = 0; 2462 2463 while (av[0]) { 2464 if (isdigit(**av)) { 2465 i = atoi(*av); 2466 if (i < 0 || i > RESVD_SET) 2467 errx(EX_DATAERR, 2468 "invalid set number %d\n", i); 2469 masks[which] |= (1<<i); 2470 } else if (_substrcmp(*av, "disable") == 0) 2471 which = 0; 2472 else if (_substrcmp(*av, "enable") == 0) 2473 which = 1; 2474 else 2475 errx(EX_DATAERR, 2476 "invalid set command %s\n", *av); 2477 av++; 2478 } 2479 if ( (masks[0] & masks[1]) != 0 ) 2480 errx(EX_DATAERR, 2481 "cannot enable and disable the same set\n"); 2482 2483 rt.set = masks[0]; 2484 rt.new_set = masks[1]; 2485 i = do_range_cmd(IP_FW_SET_ENABLE, &rt); 2486 if (i) 2487 warn("set enable/disable: setsockopt(IP_FW_SET_ENABLE)"); 2488 } else 2489 errx(EX_USAGE, "invalid set command %s\n", *av); 2490 } 2491 2492 void 2493 ipfw_sysctl_handler(char *av[], int which) 2494 { 2495 av++; 2496 2497 if (av[0] == NULL) { 2498 warnx("missing keyword to enable/disable\n"); 2499 } else if (_substrcmp(*av, "firewall") == 0) { 2500 sysctlbyname("net.inet.ip.fw.enable", NULL, 0, 2501 &which, sizeof(which)); 2502 sysctlbyname("net.inet6.ip6.fw.enable", NULL, 0, 2503 &which, sizeof(which)); 2504 } else if (_substrcmp(*av, "one_pass") == 0) { 2505 sysctlbyname("net.inet.ip.fw.one_pass", NULL, 0, 2506 &which, sizeof(which)); 2507 } else if (_substrcmp(*av, "debug") == 0) { 2508 sysctlbyname("net.inet.ip.fw.debug", NULL, 0, 2509 &which, sizeof(which)); 2510 } else if (_substrcmp(*av, "verbose") == 0) { 2511 sysctlbyname("net.inet.ip.fw.verbose", NULL, 0, 2512 &which, sizeof(which)); 2513 } else if (_substrcmp(*av, "dyn_keepalive") == 0) { 2514 sysctlbyname("net.inet.ip.fw.dyn_keepalive", NULL, 0, 2515 &which, sizeof(which)); 2516 #ifndef NO_ALTQ 2517 } else if (_substrcmp(*av, "altq") == 0) { 2518 altq_set_enabled(which); 2519 #endif 2520 } else { 2521 warnx("unrecognize enable/disable keyword: %s\n", *av); 2522 } 2523 } 2524 2525 typedef void state_cb(struct cmdline_opts *co, struct format_opts *fo, 2526 void *arg, void *state); 2527 2528 static void 2529 prepare_format_dyn(struct cmdline_opts *co, struct format_opts *fo, 2530 void *arg __unused, void *_state) 2531 { 2532 ipfw_dyn_rule *d; 2533 int width; 2534 uint8_t set; 2535 2536 d = (ipfw_dyn_rule *)_state; 2537 /* Count _ALL_ states */ 2538 fo->dcnt++; 2539 2540 if (fo->show_counters == 0) 2541 return; 2542 2543 if (co->use_set) { 2544 /* skip states from another set */ 2545 bcopy((char *)&d->rule + sizeof(uint16_t), &set, 2546 sizeof(uint8_t)); 2547 if (set != co->use_set - 1) 2548 return; 2549 } 2550 2551 width = pr_u64(NULL, &d->pcnt, 0); 2552 if (width > fo->pcwidth) 2553 fo->pcwidth = width; 2554 2555 width = pr_u64(NULL, &d->bcnt, 0); 2556 if (width > fo->bcwidth) 2557 fo->bcwidth = width; 2558 } 2559 2560 static int 2561 foreach_state(struct cmdline_opts *co, struct format_opts *fo, 2562 caddr_t base, size_t sz, state_cb dyn_bc, void *dyn_arg) 2563 { 2564 int ttype; 2565 state_cb *fptr; 2566 void *farg; 2567 ipfw_obj_tlv *tlv; 2568 ipfw_obj_ctlv *ctlv; 2569 2570 fptr = NULL; 2571 ttype = 0; 2572 2573 while (sz > 0) { 2574 ctlv = (ipfw_obj_ctlv *)base; 2575 switch (ctlv->head.type) { 2576 case IPFW_TLV_DYNSTATE_LIST: 2577 base += sizeof(*ctlv); 2578 sz -= sizeof(*ctlv); 2579 ttype = IPFW_TLV_DYN_ENT; 2580 fptr = dyn_bc; 2581 farg = dyn_arg; 2582 break; 2583 default: 2584 return (sz); 2585 } 2586 2587 while (sz > 0) { 2588 tlv = (ipfw_obj_tlv *)base; 2589 if (tlv->type != ttype) 2590 break; 2591 2592 fptr(co, fo, farg, tlv + 1); 2593 sz -= tlv->length; 2594 base += tlv->length; 2595 } 2596 } 2597 2598 return (sz); 2599 } 2600 2601 static void 2602 prepare_format_opts(struct cmdline_opts *co, struct format_opts *fo, 2603 ipfw_obj_tlv *rtlv, int rcnt, caddr_t dynbase, size_t dynsz) 2604 { 2605 int bcwidth, pcwidth, width; 2606 int n; 2607 struct ip_fw_bcounter *cntr; 2608 struct ip_fw_rule *r; 2609 2610 bcwidth = 0; 2611 pcwidth = 0; 2612 if (fo->show_counters != 0) { 2613 for (n = 0; n < rcnt; n++, 2614 rtlv = (ipfw_obj_tlv *)((caddr_t)rtlv + rtlv->length)) { 2615 cntr = (struct ip_fw_bcounter *)(rtlv + 1); 2616 r = (struct ip_fw_rule *)((caddr_t)cntr + cntr->size); 2617 /* skip rules from another set */ 2618 if (co->use_set && r->set != co->use_set - 1) 2619 continue; 2620 2621 /* packet counter */ 2622 width = pr_u64(NULL, &cntr->pcnt, 0); 2623 if (width > pcwidth) 2624 pcwidth = width; 2625 2626 /* byte counter */ 2627 width = pr_u64(NULL, &cntr->bcnt, 0); 2628 if (width > bcwidth) 2629 bcwidth = width; 2630 } 2631 } 2632 fo->bcwidth = bcwidth; 2633 fo->pcwidth = pcwidth; 2634 2635 fo->dcnt = 0; 2636 if (co->do_dynamic && dynsz > 0) 2637 foreach_state(co, fo, dynbase, dynsz, prepare_format_dyn, NULL); 2638 } 2639 2640 static int 2641 list_static_range(struct cmdline_opts *co, struct format_opts *fo, 2642 struct buf_pr *bp, ipfw_obj_tlv *rtlv, int rcnt) 2643 { 2644 int n, seen; 2645 struct ip_fw_rule *r; 2646 struct ip_fw_bcounter *cntr; 2647 int c = 0; 2648 2649 for (n = seen = 0; n < rcnt; n++, 2650 rtlv = (ipfw_obj_tlv *)((caddr_t)rtlv + rtlv->length)) { 2651 2652 if ((fo->show_counters | fo->show_time) != 0) { 2653 cntr = (struct ip_fw_bcounter *)(rtlv + 1); 2654 r = (struct ip_fw_rule *)((caddr_t)cntr + cntr->size); 2655 } else { 2656 cntr = NULL; 2657 r = (struct ip_fw_rule *)(rtlv + 1); 2658 } 2659 if (r->rulenum > fo->last) 2660 break; 2661 if (co->use_set && r->set != co->use_set - 1) 2662 continue; 2663 if (r->rulenum >= fo->first && r->rulenum <= fo->last) { 2664 show_static_rule(co, fo, bp, r, cntr); 2665 printf("%s", bp->buf); 2666 c += rtlv->length; 2667 bp_flush(bp); 2668 seen++; 2669 } 2670 } 2671 2672 return (seen); 2673 } 2674 2675 static void 2676 list_dyn_state(struct cmdline_opts *co, struct format_opts *fo, 2677 void *_arg, void *_state) 2678 { 2679 uint16_t rulenum; 2680 uint8_t set; 2681 ipfw_dyn_rule *d; 2682 struct buf_pr *bp; 2683 2684 d = (ipfw_dyn_rule *)_state; 2685 bp = (struct buf_pr *)_arg; 2686 2687 bcopy(&d->rule, &rulenum, sizeof(rulenum)); 2688 if (rulenum > fo->last) 2689 return; 2690 if (co->use_set) { 2691 bcopy((char *)&d->rule + sizeof(uint16_t), 2692 &set, sizeof(uint8_t)); 2693 if (set != co->use_set - 1) 2694 return; 2695 } 2696 if (rulenum >= fo->first) { 2697 show_dyn_state(co, fo, bp, d); 2698 printf("%s\n", bp->buf); 2699 bp_flush(bp); 2700 } 2701 } 2702 2703 static int 2704 list_dyn_range(struct cmdline_opts *co, struct format_opts *fo, 2705 struct buf_pr *bp, caddr_t base, size_t sz) 2706 { 2707 2708 sz = foreach_state(co, fo, base, sz, list_dyn_state, bp); 2709 return (sz); 2710 } 2711 2712 void 2713 ipfw_list(int ac, char *av[], int show_counters) 2714 { 2715 ipfw_cfg_lheader *cfg; 2716 struct format_opts sfo; 2717 size_t sz; 2718 int error; 2719 int lac; 2720 char **lav; 2721 uint32_t rnum; 2722 char *endptr; 2723 2724 if (g_co.test_only) { 2725 fprintf(stderr, "Testing only, list disabled\n"); 2726 return; 2727 } 2728 if (g_co.do_pipe) { 2729 dummynet_list(ac, av, show_counters); 2730 return; 2731 } 2732 2733 ac--; 2734 av++; 2735 memset(&sfo, 0, sizeof(sfo)); 2736 2737 /* Determine rule range to request */ 2738 if (ac > 0) { 2739 for (lac = ac, lav = av; lac != 0; lac--) { 2740 rnum = strtoul(*lav++, &endptr, 10); 2741 if (sfo.first == 0 || rnum < sfo.first) 2742 sfo.first = rnum; 2743 2744 if (*endptr == '-') 2745 rnum = strtoul(endptr + 1, &endptr, 10); 2746 if (sfo.last == 0 || rnum > sfo.last) 2747 sfo.last = rnum; 2748 } 2749 } 2750 2751 /* get configuraion from kernel */ 2752 cfg = NULL; 2753 sfo.show_counters = show_counters; 2754 sfo.show_time = g_co.do_time; 2755 if (g_co.do_dynamic != 2) 2756 sfo.flags |= IPFW_CFG_GET_STATIC; 2757 if (g_co.do_dynamic != 0) 2758 sfo.flags |= IPFW_CFG_GET_STATES; 2759 if ((sfo.show_counters | sfo.show_time) != 0) 2760 sfo.flags |= IPFW_CFG_GET_COUNTERS; 2761 if (ipfw_get_config(&g_co, &sfo, &cfg, &sz) != 0) 2762 err(EX_OSERR, "retrieving config failed"); 2763 2764 error = ipfw_show_config(&g_co, &sfo, cfg, sz, ac, av); 2765 2766 free(cfg); 2767 2768 if (error != EX_OK) 2769 exit(error); 2770 } 2771 2772 static int 2773 ipfw_show_config(struct cmdline_opts *co, struct format_opts *fo, 2774 ipfw_cfg_lheader *cfg, size_t sz, int ac, char *av[]) 2775 { 2776 caddr_t dynbase; 2777 size_t dynsz; 2778 int rcnt; 2779 int exitval = EX_OK; 2780 int lac; 2781 char **lav; 2782 char *endptr; 2783 size_t readsz; 2784 struct buf_pr bp; 2785 ipfw_obj_ctlv *ctlv, *tstate; 2786 ipfw_obj_tlv *rbase; 2787 2788 /* 2789 * Handle tablenames TLV first, if any 2790 */ 2791 tstate = NULL; 2792 rbase = NULL; 2793 dynbase = NULL; 2794 dynsz = 0; 2795 readsz = sizeof(*cfg); 2796 rcnt = 0; 2797 2798 fo->set_mask = cfg->set_mask; 2799 2800 ctlv = (ipfw_obj_ctlv *)(cfg + 1); 2801 if (ctlv->head.type == IPFW_TLV_TBLNAME_LIST) { 2802 object_sort_ctlv(ctlv); 2803 fo->tstate = ctlv; 2804 readsz += ctlv->head.length; 2805 ctlv = (ipfw_obj_ctlv *)((caddr_t)ctlv + ctlv->head.length); 2806 } 2807 2808 if (cfg->flags & IPFW_CFG_GET_STATIC) { 2809 /* We've requested static rules */ 2810 if (ctlv->head.type == IPFW_TLV_RULE_LIST) { 2811 rbase = (ipfw_obj_tlv *)(ctlv + 1); 2812 rcnt = ctlv->count; 2813 readsz += ctlv->head.length; 2814 ctlv = (ipfw_obj_ctlv *)((caddr_t)ctlv + 2815 ctlv->head.length); 2816 } 2817 } 2818 2819 if ((cfg->flags & IPFW_CFG_GET_STATES) && (readsz != sz)) { 2820 /* We may have some dynamic states */ 2821 dynsz = sz - readsz; 2822 /* Skip empty header */ 2823 if (dynsz != sizeof(ipfw_obj_ctlv)) 2824 dynbase = (caddr_t)ctlv; 2825 else 2826 dynsz = 0; 2827 } 2828 2829 prepare_format_opts(co, fo, rbase, rcnt, dynbase, dynsz); 2830 bp_alloc(&bp, 4096); 2831 2832 /* if no rule numbers were specified, list all rules */ 2833 if (ac == 0) { 2834 fo->first = 0; 2835 fo->last = IPFW_DEFAULT_RULE; 2836 if (cfg->flags & IPFW_CFG_GET_STATIC) 2837 list_static_range(co, fo, &bp, rbase, rcnt); 2838 2839 if (co->do_dynamic && dynsz > 0) { 2840 printf("## Dynamic rules (%d %zu):\n", fo->dcnt, 2841 dynsz); 2842 list_dyn_range(co, fo, &bp, dynbase, dynsz); 2843 } 2844 2845 bp_free(&bp); 2846 return (EX_OK); 2847 } 2848 2849 /* display specific rules requested on command line */ 2850 for (lac = ac, lav = av; lac != 0; lac--) { 2851 /* convert command line rule # */ 2852 fo->last = fo->first = strtoul(*lav++, &endptr, 10); 2853 if (*endptr == '-') 2854 fo->last = strtoul(endptr + 1, &endptr, 10); 2855 if (*endptr) { 2856 exitval = EX_USAGE; 2857 warnx("invalid rule number: %s", *(lav - 1)); 2858 continue; 2859 } 2860 2861 if ((cfg->flags & IPFW_CFG_GET_STATIC) == 0) 2862 continue; 2863 2864 if (list_static_range(co, fo, &bp, rbase, rcnt) == 0) { 2865 /* give precedence to other error(s) */ 2866 if (exitval == EX_OK) 2867 exitval = EX_UNAVAILABLE; 2868 if (fo->first == fo->last) 2869 warnx("rule %u does not exist", fo->first); 2870 else 2871 warnx("no rules in range %u-%u", 2872 fo->first, fo->last); 2873 } 2874 } 2875 2876 if (co->do_dynamic && dynsz > 0) { 2877 printf("## Dynamic rules:\n"); 2878 for (lac = ac, lav = av; lac != 0; lac--) { 2879 fo->last = fo->first = strtoul(*lav++, &endptr, 10); 2880 if (*endptr == '-') 2881 fo->last = strtoul(endptr+1, &endptr, 10); 2882 if (*endptr) 2883 /* already warned */ 2884 continue; 2885 list_dyn_range(co, fo, &bp, dynbase, dynsz); 2886 } 2887 } 2888 2889 bp_free(&bp); 2890 return (exitval); 2891 } 2892 2893 2894 /* 2895 * Retrieves current ipfw configuration of given type 2896 * and stores its pointer to @pcfg. 2897 * 2898 * Caller is responsible for freeing @pcfg. 2899 * 2900 * Returns 0 on success. 2901 */ 2902 2903 static int 2904 ipfw_get_config(struct cmdline_opts *co, struct format_opts *fo, 2905 ipfw_cfg_lheader **pcfg, size_t *psize) 2906 { 2907 ipfw_cfg_lheader *cfg; 2908 size_t sz; 2909 int i; 2910 2911 2912 if (co->test_only != 0) { 2913 fprintf(stderr, "Testing only, list disabled\n"); 2914 return (0); 2915 } 2916 2917 /* Start with some data size */ 2918 sz = 4096; 2919 cfg = NULL; 2920 2921 for (i = 0; i < 16; i++) { 2922 if (cfg != NULL) 2923 free(cfg); 2924 if ((cfg = calloc(1, sz)) == NULL) 2925 return (ENOMEM); 2926 2927 cfg->flags = fo->flags; 2928 cfg->start_rule = fo->first; 2929 cfg->end_rule = fo->last; 2930 2931 if (do_get3(IP_FW_XGET, &cfg->opheader, &sz) != 0) { 2932 if (errno != ENOMEM) { 2933 free(cfg); 2934 return (errno); 2935 } 2936 2937 /* Buffer size is not enough. Try to increase */ 2938 sz = sz * 2; 2939 if (sz < cfg->size) 2940 sz = cfg->size; 2941 continue; 2942 } 2943 2944 *pcfg = cfg; 2945 *psize = sz; 2946 return (0); 2947 } 2948 2949 free(cfg); 2950 return (ENOMEM); 2951 } 2952 2953 static int 2954 lookup_host (char *host, struct in_addr *ipaddr) 2955 { 2956 struct hostent *he; 2957 2958 if (!inet_aton(host, ipaddr)) { 2959 if ((he = gethostbyname(host)) == NULL) 2960 return(-1); 2961 *ipaddr = *(struct in_addr *)he->h_addr_list[0]; 2962 } 2963 return(0); 2964 } 2965 2966 struct tidx { 2967 ipfw_obj_ntlv *idx; 2968 uint32_t count; 2969 uint32_t size; 2970 uint16_t counter; 2971 uint8_t set; 2972 }; 2973 2974 int 2975 ipfw_check_object_name(const char *name) 2976 { 2977 int c, i, l; 2978 2979 /* 2980 * Check that name is null-terminated and contains 2981 * valid symbols only. Valid mask is: 2982 * [a-zA-Z0-9\-_\.]{1,63} 2983 */ 2984 l = strlen(name); 2985 if (l == 0 || l >= 64) 2986 return (EINVAL); 2987 for (i = 0; i < l; i++) { 2988 c = name[i]; 2989 if (isalpha(c) || isdigit(c) || c == '_' || 2990 c == '-' || c == '.') 2991 continue; 2992 return (EINVAL); 2993 } 2994 return (0); 2995 } 2996 2997 static const char *default_state_name = "default"; 2998 2999 static int 3000 state_check_name(const char *name) 3001 { 3002 3003 if (ipfw_check_object_name(name) != 0) 3004 return (EINVAL); 3005 if (strcmp(name, "any") == 0) 3006 return (EINVAL); 3007 return (0); 3008 } 3009 3010 static int 3011 eaction_check_name(const char *name) 3012 { 3013 3014 if (ipfw_check_object_name(name) != 0) 3015 return (EINVAL); 3016 /* Restrict some 'special' names */ 3017 if (match_token(rule_actions, name) != -1 && 3018 match_token(rule_action_params, name) != -1) 3019 return (EINVAL); 3020 return (0); 3021 } 3022 3023 static uint16_t 3024 pack_object(struct tidx *tstate, const char *name, int otype) 3025 { 3026 ipfw_obj_ntlv *ntlv; 3027 uint32_t i; 3028 3029 for (i = 0; i < tstate->count; i++) { 3030 if (strcmp(tstate->idx[i].name, name) != 0) 3031 continue; 3032 if (tstate->idx[i].set != tstate->set) 3033 continue; 3034 if (tstate->idx[i].head.type != otype) 3035 continue; 3036 3037 return (tstate->idx[i].idx); 3038 } 3039 3040 if (tstate->count + 1 > tstate->size) { 3041 tstate->size += 4; 3042 tstate->idx = realloc(tstate->idx, tstate->size * 3043 sizeof(ipfw_obj_ntlv)); 3044 if (tstate->idx == NULL) 3045 return (0); 3046 } 3047 3048 ntlv = &tstate->idx[i]; 3049 memset(ntlv, 0, sizeof(ipfw_obj_ntlv)); 3050 strlcpy(ntlv->name, name, sizeof(ntlv->name)); 3051 ntlv->head.type = otype; 3052 ntlv->head.length = sizeof(ipfw_obj_ntlv); 3053 ntlv->set = tstate->set; 3054 ntlv->idx = ++tstate->counter; 3055 tstate->count++; 3056 3057 return (ntlv->idx); 3058 } 3059 3060 static uint16_t 3061 pack_table(struct tidx *tstate, const char *name) 3062 { 3063 3064 if (table_check_name(name) != 0) 3065 return (0); 3066 3067 return (pack_object(tstate, name, IPFW_TLV_TBL_NAME)); 3068 } 3069 3070 void 3071 fill_table(struct _ipfw_insn *cmd, char *av, uint8_t opcode, 3072 struct tidx *tstate) 3073 { 3074 uint32_t *d = ((ipfw_insn_u32 *)cmd)->d; 3075 uint16_t uidx; 3076 char *p; 3077 3078 if ((p = strchr(av + 6, ')')) == NULL) 3079 errx(EX_DATAERR, "forgotten parenthesis: '%s'", av); 3080 *p = '\0'; 3081 p = strchr(av + 6, ','); 3082 if (p) 3083 *p++ = '\0'; 3084 3085 if ((uidx = pack_table(tstate, av + 6)) == 0) 3086 errx(EX_DATAERR, "Invalid table name: %s", av + 6); 3087 3088 cmd->opcode = opcode; 3089 cmd->arg1 = uidx; 3090 if (p) { 3091 cmd->len |= F_INSN_SIZE(ipfw_insn_u32); 3092 d[0] = strtoul(p, NULL, 0); 3093 } else 3094 cmd->len |= F_INSN_SIZE(ipfw_insn); 3095 } 3096 3097 3098 /* 3099 * fills the addr and mask fields in the instruction as appropriate from av. 3100 * Update length as appropriate. 3101 * The following formats are allowed: 3102 * me returns O_IP_*_ME 3103 * 1.2.3.4 single IP address 3104 * 1.2.3.4:5.6.7.8 address:mask 3105 * 1.2.3.4/24 address/mask 3106 * 1.2.3.4/26{1,6,5,4,23} set of addresses in a subnet 3107 * We can have multiple comma-separated address/mask entries. 3108 */ 3109 static void 3110 fill_ip(ipfw_insn_ip *cmd, char *av, int cblen, struct tidx *tstate) 3111 { 3112 int len = 0; 3113 uint32_t *d = ((ipfw_insn_u32 *)cmd)->d; 3114 3115 cmd->o.len &= ~F_LEN_MASK; /* zero len */ 3116 3117 if (_substrcmp(av, "any") == 0) 3118 return; 3119 3120 if (_substrcmp(av, "me") == 0) { 3121 cmd->o.len |= F_INSN_SIZE(ipfw_insn); 3122 return; 3123 } 3124 3125 if (strncmp(av, "table(", 6) == 0) { 3126 fill_table(&cmd->o, av, O_IP_DST_LOOKUP, tstate); 3127 return; 3128 } 3129 3130 while (av) { 3131 /* 3132 * After the address we can have '/' or ':' indicating a mask, 3133 * ',' indicating another address follows, '{' indicating a 3134 * set of addresses of unspecified size. 3135 */ 3136 char *t = NULL, *p = strpbrk(av, "/:,{"); 3137 int masklen; 3138 char md, nd = '\0'; 3139 3140 CHECK_LENGTH(cblen, (int)F_INSN_SIZE(ipfw_insn) + 2 + len); 3141 3142 if (p) { 3143 md = *p; 3144 *p++ = '\0'; 3145 if ((t = strpbrk(p, ",{")) != NULL) { 3146 nd = *t; 3147 *t = '\0'; 3148 } 3149 } else 3150 md = '\0'; 3151 3152 if (lookup_host(av, (struct in_addr *)&d[0]) != 0) 3153 errx(EX_NOHOST, "hostname ``%s'' unknown", av); 3154 switch (md) { 3155 case ':': 3156 if (!inet_aton(p, (struct in_addr *)&d[1])) 3157 errx(EX_DATAERR, "bad netmask ``%s''", p); 3158 break; 3159 case '/': 3160 masklen = atoi(p); 3161 if (masklen == 0) 3162 d[1] = htonl(0U); /* mask */ 3163 else if (masklen > 32) 3164 errx(EX_DATAERR, "bad width ``%s''", p); 3165 else 3166 d[1] = htonl(~0U << (32 - masklen)); 3167 break; 3168 case '{': /* no mask, assume /24 and put back the '{' */ 3169 d[1] = htonl(~0U << (32 - 24)); 3170 *(--p) = md; 3171 break; 3172 3173 case ',': /* single address plus continuation */ 3174 *(--p) = md; 3175 /* FALLTHROUGH */ 3176 case 0: /* initialization value */ 3177 default: 3178 d[1] = htonl(~0U); /* force /32 */ 3179 break; 3180 } 3181 d[0] &= d[1]; /* mask base address with mask */ 3182 if (t) 3183 *t = nd; 3184 /* find next separator */ 3185 if (p) 3186 p = strpbrk(p, ",{"); 3187 if (p && *p == '{') { 3188 /* 3189 * We have a set of addresses. They are stored as follows: 3190 * arg1 is the set size (powers of 2, 2..256) 3191 * addr is the base address IN HOST FORMAT 3192 * mask.. is an array of arg1 bits (rounded up to 3193 * the next multiple of 32) with bits set 3194 * for each host in the map. 3195 */ 3196 uint32_t *map = (uint32_t *)&cmd->mask; 3197 int low, high; 3198 int i = contigmask((uint8_t *)&(d[1]), 32); 3199 3200 if (len > 0) 3201 errx(EX_DATAERR, "address set cannot be in a list"); 3202 if (i < 24 || i > 31) 3203 errx(EX_DATAERR, "invalid set with mask %d\n", i); 3204 cmd->o.arg1 = 1<<(32-i); /* map length */ 3205 d[0] = ntohl(d[0]); /* base addr in host format */ 3206 cmd->o.opcode = O_IP_DST_SET; /* default */ 3207 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32) + (cmd->o.arg1+31)/32; 3208 for (i = 0; i < (cmd->o.arg1+31)/32 ; i++) 3209 map[i] = 0; /* clear map */ 3210 3211 av = p + 1; 3212 low = d[0] & 0xff; 3213 high = low + cmd->o.arg1 - 1; 3214 /* 3215 * Here, i stores the previous value when we specify a range 3216 * of addresses within a mask, e.g. 45-63. i = -1 means we 3217 * have no previous value. 3218 */ 3219 i = -1; /* previous value in a range */ 3220 while (isdigit(*av)) { 3221 char *s; 3222 int a = strtol(av, &s, 0); 3223 3224 if (s == av) { /* no parameter */ 3225 if (*av != '}') 3226 errx(EX_DATAERR, "set not closed\n"); 3227 if (i != -1) 3228 errx(EX_DATAERR, "incomplete range %d-", i); 3229 break; 3230 } 3231 if (a < low || a > high) 3232 errx(EX_DATAERR, "addr %d out of range [%d-%d]\n", 3233 a, low, high); 3234 a -= low; 3235 if (i == -1) /* no previous in range */ 3236 i = a; 3237 else { /* check that range is valid */ 3238 if (i > a) 3239 errx(EX_DATAERR, "invalid range %d-%d", 3240 i+low, a+low); 3241 if (*s == '-') 3242 errx(EX_DATAERR, "double '-' in range"); 3243 } 3244 for (; i <= a; i++) 3245 map[i/32] |= 1<<(i & 31); 3246 i = -1; 3247 if (*s == '-') 3248 i = a; 3249 else if (*s == '}') 3250 break; 3251 av = s+1; 3252 } 3253 return; 3254 } 3255 av = p; 3256 if (av) /* then *av must be a ',' */ 3257 av++; 3258 3259 /* Check this entry */ 3260 if (d[1] == 0) { /* "any", specified as x.x.x.x/0 */ 3261 /* 3262 * 'any' turns the entire list into a NOP. 3263 * 'not any' never matches, so it is removed from the 3264 * list unless it is the only item, in which case we 3265 * report an error. 3266 */ 3267 if (cmd->o.len & F_NOT) { /* "not any" never matches */ 3268 if (av == NULL && len == 0) /* only this entry */ 3269 errx(EX_DATAERR, "not any never matches"); 3270 } 3271 /* else do nothing and skip this entry */ 3272 return; 3273 } 3274 /* A single IP can be stored in an optimized format */ 3275 if (d[1] == (uint32_t)~0 && av == NULL && len == 0) { 3276 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32); 3277 return; 3278 } 3279 len += 2; /* two words... */ 3280 d += 2; 3281 } /* end while */ 3282 if (len + 1 > F_LEN_MASK) 3283 errx(EX_DATAERR, "address list too long"); 3284 cmd->o.len |= len+1; 3285 } 3286 3287 3288 /* n2mask sets n bits of the mask */ 3289 void 3290 n2mask(struct in6_addr *mask, int n) 3291 { 3292 static int minimask[9] = 3293 { 0x00, 0x80, 0xc0, 0xe0, 0xf0, 0xf8, 0xfc, 0xfe, 0xff }; 3294 u_char *p; 3295 3296 memset(mask, 0, sizeof(struct in6_addr)); 3297 p = (u_char *) mask; 3298 for (; n > 0; p++, n -= 8) { 3299 if (n >= 8) 3300 *p = 0xff; 3301 else 3302 *p = minimask[n]; 3303 } 3304 return; 3305 } 3306 3307 static void 3308 fill_flags_cmd(ipfw_insn *cmd, enum ipfw_opcodes opcode, 3309 struct _s_x *flags, char *p) 3310 { 3311 char *e; 3312 uint32_t set = 0, clear = 0; 3313 3314 if (fill_flags(flags, p, &e, &set, &clear) != 0) 3315 errx(EX_DATAERR, "invalid flag %s", e); 3316 3317 cmd->opcode = opcode; 3318 cmd->len = (cmd->len & (F_NOT | F_OR)) | 1; 3319 cmd->arg1 = (set & 0xff) | ( (clear & 0xff) << 8); 3320 } 3321 3322 3323 void 3324 ipfw_delete(char *av[]) 3325 { 3326 ipfw_range_tlv rt; 3327 char *sep; 3328 int i, j; 3329 int exitval = EX_OK; 3330 int do_set = 0; 3331 3332 av++; 3333 NEED1("missing rule specification"); 3334 if ( *av && _substrcmp(*av, "set") == 0) { 3335 /* Do not allow using the following syntax: 3336 * ipfw set N delete set M 3337 */ 3338 if (g_co.use_set) 3339 errx(EX_DATAERR, "invalid syntax"); 3340 do_set = 1; /* delete set */ 3341 av++; 3342 } 3343 3344 /* Rule number */ 3345 while (*av && isdigit(**av)) { 3346 i = strtol(*av, &sep, 10); 3347 j = i; 3348 if (*sep== '-') 3349 j = strtol(sep + 1, NULL, 10); 3350 av++; 3351 if (g_co.do_nat) { 3352 exitval = ipfw_delete_nat(i); 3353 } else if (g_co.do_pipe) { 3354 exitval = ipfw_delete_pipe(g_co.do_pipe, i); 3355 } else { 3356 memset(&rt, 0, sizeof(rt)); 3357 if (do_set != 0) { 3358 rt.set = i & 31; 3359 rt.flags = IPFW_RCFLAG_SET; 3360 } else { 3361 rt.start_rule = i & 0xffff; 3362 rt.end_rule = j & 0xffff; 3363 if (rt.start_rule == 0 && rt.end_rule == 0) 3364 rt.flags |= IPFW_RCFLAG_ALL; 3365 else 3366 rt.flags |= IPFW_RCFLAG_RANGE; 3367 if (g_co.use_set != 0) { 3368 rt.set = g_co.use_set - 1; 3369 rt.flags |= IPFW_RCFLAG_SET; 3370 } 3371 } 3372 if (g_co.do_dynamic == 2) 3373 rt.flags |= IPFW_RCFLAG_DYNAMIC; 3374 i = do_range_cmd(IP_FW_XDEL, &rt); 3375 if (i != 0) { 3376 exitval = EX_UNAVAILABLE; 3377 if (g_co.do_quiet) 3378 continue; 3379 warn("rule %u: setsockopt(IP_FW_XDEL)", 3380 rt.start_rule); 3381 } else if (rt.new_set == 0 && do_set == 0 && 3382 g_co.do_dynamic != 2) { 3383 exitval = EX_UNAVAILABLE; 3384 if (g_co.do_quiet) 3385 continue; 3386 if (rt.start_rule != rt.end_rule) 3387 warnx("no rules rules in %u-%u range", 3388 rt.start_rule, rt.end_rule); 3389 else 3390 warnx("rule %u not found", 3391 rt.start_rule); 3392 } 3393 } 3394 } 3395 if (exitval != EX_OK && g_co.do_force == 0) 3396 exit(exitval); 3397 } 3398 3399 3400 /* 3401 * fill the interface structure. We do not check the name as we can 3402 * create interfaces dynamically, so checking them at insert time 3403 * makes relatively little sense. 3404 * Interface names containing '*', '?', or '[' are assumed to be shell 3405 * patterns which match interfaces. 3406 */ 3407 static void 3408 fill_iface(ipfw_insn_if *cmd, char *arg, int cblen, struct tidx *tstate) 3409 { 3410 char *p; 3411 uint16_t uidx; 3412 3413 cmd->name[0] = '\0'; 3414 cmd->o.len |= F_INSN_SIZE(ipfw_insn_if); 3415 3416 CHECK_CMDLEN; 3417 3418 /* Parse the interface or address */ 3419 if (strcmp(arg, "any") == 0) 3420 cmd->o.len = 0; /* effectively ignore this command */ 3421 else if (strncmp(arg, "table(", 6) == 0) { 3422 if ((p = strchr(arg + 6, ')')) == NULL) 3423 errx(EX_DATAERR, "forgotten parenthesis: '%s'", arg); 3424 *p = '\0'; 3425 p = strchr(arg + 6, ','); 3426 if (p) 3427 *p++ = '\0'; 3428 if ((uidx = pack_table(tstate, arg + 6)) == 0) 3429 errx(EX_DATAERR, "Invalid table name: %s", arg + 6); 3430 3431 cmd->name[0] = '\1'; /* Special value indicating table */ 3432 cmd->p.kidx = uidx; 3433 } else if (!isdigit(*arg)) { 3434 strlcpy(cmd->name, arg, sizeof(cmd->name)); 3435 cmd->p.glob = strpbrk(arg, "*?[") != NULL ? 1 : 0; 3436 } else if (!inet_aton(arg, &cmd->p.ip)) 3437 errx(EX_DATAERR, "bad ip address ``%s''", arg); 3438 } 3439 3440 static void 3441 get_mac_addr_mask(const char *p, uint8_t *addr, uint8_t *mask) 3442 { 3443 int i; 3444 size_t l; 3445 char *ap, *ptr, *optr; 3446 struct ether_addr *mac; 3447 const char *macset = "0123456789abcdefABCDEF:"; 3448 3449 if (strcmp(p, "any") == 0) { 3450 for (i = 0; i < ETHER_ADDR_LEN; i++) 3451 addr[i] = mask[i] = 0; 3452 return; 3453 } 3454 3455 optr = ptr = strdup(p); 3456 if ((ap = strsep(&ptr, "&/")) != NULL && *ap != 0) { 3457 l = strlen(ap); 3458 if (strspn(ap, macset) != l || (mac = ether_aton(ap)) == NULL) 3459 errx(EX_DATAERR, "Incorrect MAC address"); 3460 bcopy(mac, addr, ETHER_ADDR_LEN); 3461 } else 3462 errx(EX_DATAERR, "Incorrect MAC address"); 3463 3464 if (ptr != NULL) { /* we have mask? */ 3465 if (p[ptr - optr - 1] == '/') { /* mask len */ 3466 long ml = strtol(ptr, &ap, 10); 3467 if (*ap != 0 || ml > ETHER_ADDR_LEN * 8 || ml < 0) 3468 errx(EX_DATAERR, "Incorrect mask length"); 3469 for (i = 0; ml > 0 && i < ETHER_ADDR_LEN; ml -= 8, i++) 3470 mask[i] = (ml >= 8) ? 0xff: (~0) << (8 - ml); 3471 } else { /* mask */ 3472 l = strlen(ptr); 3473 if (strspn(ptr, macset) != l || 3474 (mac = ether_aton(ptr)) == NULL) 3475 errx(EX_DATAERR, "Incorrect mask"); 3476 bcopy(mac, mask, ETHER_ADDR_LEN); 3477 } 3478 } else { /* default mask: ff:ff:ff:ff:ff:ff */ 3479 for (i = 0; i < ETHER_ADDR_LEN; i++) 3480 mask[i] = 0xff; 3481 } 3482 for (i = 0; i < ETHER_ADDR_LEN; i++) 3483 addr[i] &= mask[i]; 3484 3485 free(optr); 3486 } 3487 3488 /* 3489 * helper function, updates the pointer to cmd with the length 3490 * of the current command, and also cleans up the first word of 3491 * the new command in case it has been clobbered before. 3492 */ 3493 static ipfw_insn * 3494 next_cmd(ipfw_insn *cmd, int *len) 3495 { 3496 *len -= F_LEN(cmd); 3497 CHECK_LENGTH(*len, 0); 3498 cmd += F_LEN(cmd); 3499 bzero(cmd, sizeof(*cmd)); 3500 return cmd; 3501 } 3502 3503 /* 3504 * Takes arguments and copies them into a comment 3505 */ 3506 static void 3507 fill_comment(ipfw_insn *cmd, char **av, int cblen) 3508 { 3509 int i, l; 3510 char *p = (char *)(cmd + 1); 3511 3512 cmd->opcode = O_NOP; 3513 cmd->len = (cmd->len & (F_NOT | F_OR)); 3514 3515 /* Compute length of comment string. */ 3516 for (i = 0, l = 0; av[i] != NULL; i++) 3517 l += strlen(av[i]) + 1; 3518 if (l == 0) 3519 return; 3520 if (l > 84) 3521 errx(EX_DATAERR, 3522 "comment too long (max 80 chars)"); 3523 l = 1 + (l+3)/4; 3524 cmd->len = (cmd->len & (F_NOT | F_OR)) | l; 3525 CHECK_CMDLEN; 3526 3527 for (i = 0; av[i] != NULL; i++) { 3528 strcpy(p, av[i]); 3529 p += strlen(av[i]); 3530 *p++ = ' '; 3531 } 3532 *(--p) = '\0'; 3533 } 3534 3535 /* 3536 * A function to fill simple commands of size 1. 3537 * Existing flags are preserved. 3538 */ 3539 static void 3540 fill_cmd(ipfw_insn *cmd, enum ipfw_opcodes opcode, int flags, uint16_t arg) 3541 { 3542 cmd->opcode = opcode; 3543 cmd->len = ((cmd->len | flags) & (F_NOT | F_OR)) | 1; 3544 cmd->arg1 = arg; 3545 } 3546 3547 /* 3548 * Fetch and add the MAC address and type, with masks. This generates one or 3549 * two microinstructions, and returns the pointer to the last one. 3550 */ 3551 static ipfw_insn * 3552 add_mac(ipfw_insn *cmd, char *av[], int cblen) 3553 { 3554 ipfw_insn_mac *mac; 3555 3556 if ( ( av[0] == NULL ) || ( av[1] == NULL ) ) 3557 errx(EX_DATAERR, "MAC dst src"); 3558 3559 cmd->opcode = O_MACADDR2; 3560 cmd->len = (cmd->len & (F_NOT | F_OR)) | F_INSN_SIZE(ipfw_insn_mac); 3561 CHECK_CMDLEN; 3562 3563 mac = (ipfw_insn_mac *)cmd; 3564 get_mac_addr_mask(av[0], mac->addr, mac->mask); /* dst */ 3565 get_mac_addr_mask(av[1], &(mac->addr[ETHER_ADDR_LEN]), 3566 &(mac->mask[ETHER_ADDR_LEN])); /* src */ 3567 return cmd; 3568 } 3569 3570 static ipfw_insn * 3571 add_mactype(ipfw_insn *cmd, char *av, int cblen) 3572 { 3573 if (!av) 3574 errx(EX_DATAERR, "missing MAC type"); 3575 if (strcmp(av, "any") != 0) { /* we have a non-null type */ 3576 fill_newports((ipfw_insn_u16 *)cmd, av, IPPROTO_ETHERTYPE, 3577 cblen); 3578 cmd->opcode = O_MAC_TYPE; 3579 return cmd; 3580 } else 3581 return NULL; 3582 } 3583 3584 static ipfw_insn * 3585 add_proto0(ipfw_insn *cmd, char *av, u_char *protop) 3586 { 3587 struct protoent *pe; 3588 char *ep; 3589 int proto; 3590 3591 proto = strtol(av, &ep, 10); 3592 if (*ep != '\0' || proto <= 0) { 3593 if ((pe = getprotobyname(av)) == NULL) 3594 return NULL; 3595 proto = pe->p_proto; 3596 } 3597 3598 fill_cmd(cmd, O_PROTO, 0, proto); 3599 *protop = proto; 3600 return cmd; 3601 } 3602 3603 static ipfw_insn * 3604 add_proto(ipfw_insn *cmd, char *av, u_char *protop) 3605 { 3606 u_char proto = IPPROTO_IP; 3607 3608 if (_substrcmp(av, "all") == 0 || strcmp(av, "ip") == 0) 3609 ; /* do not set O_IP4 nor O_IP6 */ 3610 else if (strcmp(av, "ip4") == 0) 3611 /* explicit "just IPv4" rule */ 3612 fill_cmd(cmd, O_IP4, 0, 0); 3613 else if (strcmp(av, "ip6") == 0) { 3614 /* explicit "just IPv6" rule */ 3615 proto = IPPROTO_IPV6; 3616 fill_cmd(cmd, O_IP6, 0, 0); 3617 } else 3618 return add_proto0(cmd, av, protop); 3619 3620 *protop = proto; 3621 return cmd; 3622 } 3623 3624 static ipfw_insn * 3625 add_proto_compat(ipfw_insn *cmd, char *av, u_char *protop) 3626 { 3627 u_char proto = IPPROTO_IP; 3628 3629 if (_substrcmp(av, "all") == 0 || strcmp(av, "ip") == 0) 3630 ; /* do not set O_IP4 nor O_IP6 */ 3631 else if (strcmp(av, "ipv4") == 0 || strcmp(av, "ip4") == 0) 3632 /* explicit "just IPv4" rule */ 3633 fill_cmd(cmd, O_IP4, 0, 0); 3634 else if (strcmp(av, "ipv6") == 0 || strcmp(av, "ip6") == 0) { 3635 /* explicit "just IPv6" rule */ 3636 proto = IPPROTO_IPV6; 3637 fill_cmd(cmd, O_IP6, 0, 0); 3638 } else 3639 return add_proto0(cmd, av, protop); 3640 3641 *protop = proto; 3642 return cmd; 3643 } 3644 3645 static ipfw_insn * 3646 add_srcip(ipfw_insn *cmd, char *av, int cblen, struct tidx *tstate) 3647 { 3648 fill_ip((ipfw_insn_ip *)cmd, av, cblen, tstate); 3649 if (cmd->opcode == O_IP_DST_SET) /* set */ 3650 cmd->opcode = O_IP_SRC_SET; 3651 else if (cmd->opcode == O_IP_DST_LOOKUP) /* table */ 3652 cmd->opcode = O_IP_SRC_LOOKUP; 3653 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn)) /* me */ 3654 cmd->opcode = O_IP_SRC_ME; 3655 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_u32)) /* one IP */ 3656 cmd->opcode = O_IP_SRC; 3657 else /* addr/mask */ 3658 cmd->opcode = O_IP_SRC_MASK; 3659 return cmd; 3660 } 3661 3662 static ipfw_insn * 3663 add_dstip(ipfw_insn *cmd, char *av, int cblen, struct tidx *tstate) 3664 { 3665 fill_ip((ipfw_insn_ip *)cmd, av, cblen, tstate); 3666 if (cmd->opcode == O_IP_DST_SET) /* set */ 3667 ; 3668 else if (cmd->opcode == O_IP_DST_LOOKUP) /* table */ 3669 ; 3670 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn)) /* me */ 3671 cmd->opcode = O_IP_DST_ME; 3672 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_u32)) /* one IP */ 3673 cmd->opcode = O_IP_DST; 3674 else /* addr/mask */ 3675 cmd->opcode = O_IP_DST_MASK; 3676 return cmd; 3677 } 3678 3679 static struct _s_x f_reserved_keywords[] = { 3680 { "altq", TOK_OR }, 3681 { "//", TOK_OR }, 3682 { "diverted", TOK_OR }, 3683 { "dst-port", TOK_OR }, 3684 { "src-port", TOK_OR }, 3685 { "established", TOK_OR }, 3686 { "keep-state", TOK_OR }, 3687 { "frag", TOK_OR }, 3688 { "icmptypes", TOK_OR }, 3689 { "in", TOK_OR }, 3690 { "out", TOK_OR }, 3691 { "ip6", TOK_OR }, 3692 { "any", TOK_OR }, 3693 { "to", TOK_OR }, 3694 { "via", TOK_OR }, 3695 { "{", TOK_OR }, 3696 { NULL, 0 } /* terminator */ 3697 }; 3698 3699 static ipfw_insn * 3700 add_ports(ipfw_insn *cmd, char *av, u_char proto, int opcode, int cblen) 3701 { 3702 3703 if (match_token(f_reserved_keywords, av) != -1) 3704 return (NULL); 3705 3706 if (fill_newports((ipfw_insn_u16 *)cmd, av, proto, cblen)) { 3707 /* XXX todo: check that we have a protocol with ports */ 3708 cmd->opcode = opcode; 3709 return cmd; 3710 } 3711 return NULL; 3712 } 3713 3714 static ipfw_insn * 3715 add_src(ipfw_insn *cmd, char *av, u_char proto, int cblen, struct tidx *tstate) 3716 { 3717 struct in6_addr a; 3718 char *host, *ch, buf[INET6_ADDRSTRLEN]; 3719 ipfw_insn *ret = NULL; 3720 size_t len; 3721 3722 /* Copy first address in set if needed */ 3723 if ((ch = strpbrk(av, "/,")) != NULL) { 3724 len = ch - av; 3725 strlcpy(buf, av, sizeof(buf)); 3726 if (len < sizeof(buf)) 3727 buf[len] = '\0'; 3728 host = buf; 3729 } else 3730 host = av; 3731 3732 if (proto == IPPROTO_IPV6 || strcmp(av, "me6") == 0 || 3733 inet_pton(AF_INET6, host, &a) == 1) 3734 ret = add_srcip6(cmd, av, cblen, tstate); 3735 /* XXX: should check for IPv4, not !IPv6 */ 3736 if (ret == NULL && (proto == IPPROTO_IP || strcmp(av, "me") == 0 || 3737 inet_pton(AF_INET6, host, &a) != 1)) 3738 ret = add_srcip(cmd, av, cblen, tstate); 3739 if (ret == NULL && strcmp(av, "any") != 0) 3740 ret = cmd; 3741 3742 return ret; 3743 } 3744 3745 static ipfw_insn * 3746 add_dst(ipfw_insn *cmd, char *av, u_char proto, int cblen, struct tidx *tstate) 3747 { 3748 struct in6_addr a; 3749 char *host, *ch, buf[INET6_ADDRSTRLEN]; 3750 ipfw_insn *ret = NULL; 3751 size_t len; 3752 3753 /* Copy first address in set if needed */ 3754 if ((ch = strpbrk(av, "/,")) != NULL) { 3755 len = ch - av; 3756 strlcpy(buf, av, sizeof(buf)); 3757 if (len < sizeof(buf)) 3758 buf[len] = '\0'; 3759 host = buf; 3760 } else 3761 host = av; 3762 3763 if (proto == IPPROTO_IPV6 || strcmp(av, "me6") == 0 || 3764 inet_pton(AF_INET6, host, &a) == 1) 3765 ret = add_dstip6(cmd, av, cblen, tstate); 3766 /* XXX: should check for IPv4, not !IPv6 */ 3767 if (ret == NULL && (proto == IPPROTO_IP || strcmp(av, "me") == 0 || 3768 inet_pton(AF_INET6, host, &a) != 1)) 3769 ret = add_dstip(cmd, av, cblen, tstate); 3770 if (ret == NULL && strcmp(av, "any") != 0) 3771 ret = cmd; 3772 3773 return ret; 3774 } 3775 3776 /* 3777 * Parse arguments and assemble the microinstructions which make up a rule. 3778 * Rules are added into the 'rulebuf' and then copied in the correct order 3779 * into the actual rule. 3780 * 3781 * The syntax for a rule starts with the action, followed by 3782 * optional action parameters, and the various match patterns. 3783 * In the assembled microcode, the first opcode must be an O_PROBE_STATE 3784 * (generated if the rule includes a keep-state option), then the 3785 * various match patterns, log/altq actions, and the actual action. 3786 * 3787 */ 3788 static void 3789 compile_rule(char *av[], uint32_t *rbuf, int *rbufsize, struct tidx *tstate) 3790 { 3791 /* 3792 * rules are added into the 'rulebuf' and then copied in 3793 * the correct order into the actual rule. 3794 * Some things that need to go out of order (prob, action etc.) 3795 * go into actbuf[]. 3796 */ 3797 static uint32_t actbuf[255], cmdbuf[255]; 3798 int rblen, ablen, cblen; 3799 3800 ipfw_insn *src, *dst, *cmd, *action, *prev=NULL; 3801 ipfw_insn *first_cmd; /* first match pattern */ 3802 3803 struct ip_fw_rule *rule; 3804 3805 /* 3806 * various flags used to record that we entered some fields. 3807 */ 3808 ipfw_insn *have_state = NULL; /* any state-related option */ 3809 int have_rstate = 0; 3810 ipfw_insn *have_log = NULL, *have_altq = NULL, *have_tag = NULL; 3811 ipfw_insn *have_skipcmd = NULL; 3812 size_t len; 3813 3814 int i; 3815 3816 int open_par = 0; /* open parenthesis ( */ 3817 3818 /* proto is here because it is used to fetch ports */ 3819 u_char proto = IPPROTO_IP; /* default protocol */ 3820 3821 double match_prob = 1; /* match probability, default is always match */ 3822 3823 bzero(actbuf, sizeof(actbuf)); /* actions go here */ 3824 bzero(cmdbuf, sizeof(cmdbuf)); 3825 bzero(rbuf, *rbufsize); 3826 3827 rule = (struct ip_fw_rule *)rbuf; 3828 cmd = (ipfw_insn *)cmdbuf; 3829 action = (ipfw_insn *)actbuf; 3830 3831 rblen = *rbufsize / sizeof(uint32_t); 3832 rblen -= sizeof(struct ip_fw_rule) / sizeof(uint32_t); 3833 ablen = sizeof(actbuf) / sizeof(actbuf[0]); 3834 cblen = sizeof(cmdbuf) / sizeof(cmdbuf[0]); 3835 cblen -= F_INSN_SIZE(ipfw_insn_u32) + 1; 3836 3837 #define CHECK_RBUFLEN(len) { CHECK_LENGTH(rblen, len); rblen -= len; } 3838 #define CHECK_ACTLEN CHECK_LENGTH(ablen, action->len) 3839 3840 av++; 3841 3842 /* [rule N] -- Rule number optional */ 3843 if (av[0] && isdigit(**av)) { 3844 rule->rulenum = atoi(*av); 3845 av++; 3846 } 3847 3848 /* [set N] -- set number (0..RESVD_SET), optional */ 3849 if (av[0] && av[1] && _substrcmp(*av, "set") == 0) { 3850 int set = strtoul(av[1], NULL, 10); 3851 if (set < 0 || set > RESVD_SET) 3852 errx(EX_DATAERR, "illegal set %s", av[1]); 3853 rule->set = set; 3854 tstate->set = set; 3855 av += 2; 3856 } 3857 3858 /* [prob D] -- match probability, optional */ 3859 if (av[0] && av[1] && _substrcmp(*av, "prob") == 0) { 3860 match_prob = strtod(av[1], NULL); 3861 3862 if (match_prob <= 0 || match_prob > 1) 3863 errx(EX_DATAERR, "illegal match prob. %s", av[1]); 3864 av += 2; 3865 } 3866 3867 /* action -- mandatory */ 3868 NEED1("missing action"); 3869 i = match_token(rule_actions, *av); 3870 av++; 3871 action->len = 1; /* default */ 3872 CHECK_ACTLEN; 3873 switch(i) { 3874 case TOK_CHECKSTATE: 3875 have_state = action; 3876 action->opcode = O_CHECK_STATE; 3877 if (*av == NULL || 3878 match_token(rule_options, *av) == TOK_COMMENT) { 3879 action->arg1 = pack_object(tstate, 3880 default_state_name, IPFW_TLV_STATE_NAME); 3881 break; 3882 } 3883 if (*av[0] == ':') { 3884 if (strcmp(*av + 1, "any") == 0) 3885 action->arg1 = 0; 3886 else if (state_check_name(*av + 1) == 0) 3887 action->arg1 = pack_object(tstate, *av + 1, 3888 IPFW_TLV_STATE_NAME); 3889 else 3890 errx(EX_DATAERR, "Invalid state name %s", 3891 *av); 3892 av++; 3893 break; 3894 } 3895 errx(EX_DATAERR, "Invalid state name %s", *av); 3896 break; 3897 3898 case TOK_ABORT: 3899 action->opcode = O_REJECT; 3900 action->arg1 = ICMP_REJECT_ABORT; 3901 break; 3902 3903 case TOK_ABORT6: 3904 action->opcode = O_UNREACH6; 3905 action->arg1 = ICMP6_UNREACH_ABORT; 3906 break; 3907 3908 case TOK_ACCEPT: 3909 action->opcode = O_ACCEPT; 3910 break; 3911 3912 case TOK_DENY: 3913 action->opcode = O_DENY; 3914 action->arg1 = 0; 3915 break; 3916 3917 case TOK_REJECT: 3918 action->opcode = O_REJECT; 3919 action->arg1 = ICMP_UNREACH_HOST; 3920 break; 3921 3922 case TOK_RESET: 3923 action->opcode = O_REJECT; 3924 action->arg1 = ICMP_REJECT_RST; 3925 break; 3926 3927 case TOK_RESET6: 3928 action->opcode = O_UNREACH6; 3929 action->arg1 = ICMP6_UNREACH_RST; 3930 break; 3931 3932 case TOK_UNREACH: 3933 action->opcode = O_REJECT; 3934 NEED1("missing reject code"); 3935 fill_reject_code(&action->arg1, *av); 3936 av++; 3937 break; 3938 3939 case TOK_UNREACH6: 3940 action->opcode = O_UNREACH6; 3941 NEED1("missing unreach code"); 3942 fill_unreach6_code(&action->arg1, *av); 3943 av++; 3944 break; 3945 3946 case TOK_COUNT: 3947 action->opcode = O_COUNT; 3948 break; 3949 3950 case TOK_NAT: 3951 action->opcode = O_NAT; 3952 action->len = F_INSN_SIZE(ipfw_insn_nat); 3953 CHECK_ACTLEN; 3954 if (*av != NULL && _substrcmp(*av, "global") == 0) { 3955 action->arg1 = IP_FW_NAT44_GLOBAL; 3956 av++; 3957 break; 3958 } else 3959 goto chkarg; 3960 case TOK_QUEUE: 3961 action->opcode = O_QUEUE; 3962 goto chkarg; 3963 case TOK_PIPE: 3964 action->opcode = O_PIPE; 3965 goto chkarg; 3966 case TOK_SKIPTO: 3967 action->opcode = O_SKIPTO; 3968 goto chkarg; 3969 case TOK_NETGRAPH: 3970 action->opcode = O_NETGRAPH; 3971 goto chkarg; 3972 case TOK_NGTEE: 3973 action->opcode = O_NGTEE; 3974 goto chkarg; 3975 case TOK_DIVERT: 3976 action->opcode = O_DIVERT; 3977 goto chkarg; 3978 case TOK_TEE: 3979 action->opcode = O_TEE; 3980 goto chkarg; 3981 case TOK_CALL: 3982 action->opcode = O_CALLRETURN; 3983 chkarg: 3984 if (!av[0]) 3985 errx(EX_USAGE, "missing argument for %s", *(av - 1)); 3986 if (isdigit(**av)) { 3987 action->arg1 = strtoul(*av, NULL, 10); 3988 if (action->arg1 <= 0 || action->arg1 >= IP_FW_TABLEARG) 3989 errx(EX_DATAERR, "illegal argument for %s", 3990 *(av - 1)); 3991 } else if (_substrcmp(*av, "tablearg") == 0) { 3992 action->arg1 = IP_FW_TARG; 3993 } else if (i == TOK_DIVERT || i == TOK_TEE) { 3994 struct servent *s; 3995 setservent(1); 3996 s = getservbyname(av[0], "divert"); 3997 if (s != NULL) 3998 action->arg1 = ntohs(s->s_port); 3999 else 4000 errx(EX_DATAERR, "illegal divert/tee port"); 4001 } else 4002 errx(EX_DATAERR, "illegal argument for %s", *(av - 1)); 4003 av++; 4004 break; 4005 4006 case TOK_FORWARD: { 4007 /* 4008 * Locate the address-port separator (':' or ','). 4009 * Could be one of the following: 4010 * hostname:port 4011 * IPv4 a.b.c.d,port 4012 * IPv4 a.b.c.d:port 4013 * IPv6 w:x:y::z,port 4014 * IPv6 [w:x:y::z]:port 4015 */ 4016 struct sockaddr_storage result; 4017 struct addrinfo *res; 4018 char *s, *end; 4019 int family; 4020 u_short port_number = 0; 4021 4022 NEED1("missing forward address[:port]"); 4023 4024 if (strncmp(*av, "tablearg", 8) == 0 && 4025 ((*av)[8] == '\0' || (*av)[8] == ',' || (*av)[8] == ':')) 4026 memcpy(++(*av), "0.0.0.0", 7); 4027 4028 /* 4029 * Are we an bracket-enclosed IPv6 address? 4030 */ 4031 if (strchr(*av, '[')) 4032 (*av)++; 4033 4034 /* 4035 * locate the address-port separator (':' or ',') 4036 */ 4037 s = strchr(*av, ','); 4038 if (s == NULL) { 4039 s = strchr(*av, ']'); 4040 /* Prevent erroneous parsing on brackets. */ 4041 if (s != NULL) 4042 *(s++) = '\0'; 4043 else 4044 s = *av; 4045 4046 /* Distinguish between IPv4:port and IPv6 cases. */ 4047 s = strchr(s, ':'); 4048 if (s && strchr(s+1, ':')) 4049 s = NULL; /* no port */ 4050 } 4051 4052 if (s != NULL) { 4053 /* Terminate host portion and set s to start of port. */ 4054 *(s++) = '\0'; 4055 i = strtoport(s, &end, 0 /* base */, 0 /* proto */); 4056 if (s == end) 4057 errx(EX_DATAERR, 4058 "illegal forwarding port ``%s''", s); 4059 port_number = (u_short)i; 4060 } 4061 4062 /* 4063 * Resolve the host name or address to a family and a 4064 * network representation of the address. 4065 */ 4066 if (getaddrinfo(*av, NULL, NULL, &res)) 4067 errx(EX_DATAERR, NULL); 4068 /* Just use the first host in the answer. */ 4069 family = res->ai_family; 4070 memcpy(&result, res->ai_addr, res->ai_addrlen); 4071 freeaddrinfo(res); 4072 4073 if (family == PF_INET) { 4074 ipfw_insn_sa *p = (ipfw_insn_sa *)action; 4075 4076 action->opcode = O_FORWARD_IP; 4077 action->len = F_INSN_SIZE(ipfw_insn_sa); 4078 CHECK_ACTLEN; 4079 4080 /* 4081 * In the kernel we assume AF_INET and use only 4082 * sin_port and sin_addr. Remember to set sin_len as 4083 * the routing code seems to use it too. 4084 */ 4085 p->sa.sin_len = sizeof(struct sockaddr_in); 4086 p->sa.sin_family = AF_INET; 4087 p->sa.sin_port = port_number; 4088 p->sa.sin_addr.s_addr = 4089 ((struct sockaddr_in *)&result)->sin_addr.s_addr; 4090 } else if (family == PF_INET6) { 4091 ipfw_insn_sa6 *p = (ipfw_insn_sa6 *)action; 4092 4093 action->opcode = O_FORWARD_IP6; 4094 action->len = F_INSN_SIZE(ipfw_insn_sa6); 4095 CHECK_ACTLEN; 4096 4097 p->sa.sin6_len = sizeof(struct sockaddr_in6); 4098 p->sa.sin6_family = AF_INET6; 4099 p->sa.sin6_port = port_number; 4100 p->sa.sin6_flowinfo = 0; 4101 p->sa.sin6_scope_id = 4102 ((struct sockaddr_in6 *)&result)->sin6_scope_id; 4103 bcopy(&((struct sockaddr_in6*)&result)->sin6_addr, 4104 &p->sa.sin6_addr, sizeof(p->sa.sin6_addr)); 4105 } else { 4106 errx(EX_DATAERR, "Invalid address family in forward action"); 4107 } 4108 av++; 4109 break; 4110 } 4111 case TOK_COMMENT: 4112 /* pretend it is a 'count' rule followed by the comment */ 4113 action->opcode = O_COUNT; 4114 av--; /* go back... */ 4115 break; 4116 4117 case TOK_SETFIB: 4118 { 4119 int numfibs; 4120 size_t intsize = sizeof(int); 4121 4122 action->opcode = O_SETFIB; 4123 NEED1("missing fib number"); 4124 if (_substrcmp(*av, "tablearg") == 0) { 4125 action->arg1 = IP_FW_TARG; 4126 } else { 4127 action->arg1 = strtoul(*av, NULL, 10); 4128 if (sysctlbyname("net.fibs", &numfibs, &intsize, 4129 NULL, 0) == -1) 4130 errx(EX_DATAERR, "fibs not supported.\n"); 4131 if (action->arg1 >= numfibs) /* Temporary */ 4132 errx(EX_DATAERR, "fib too large.\n"); 4133 /* Add high-order bit to fib to make room for tablearg*/ 4134 action->arg1 |= 0x8000; 4135 } 4136 av++; 4137 break; 4138 } 4139 4140 case TOK_SETDSCP: 4141 { 4142 int code; 4143 4144 action->opcode = O_SETDSCP; 4145 NEED1("missing DSCP code"); 4146 if (_substrcmp(*av, "tablearg") == 0) { 4147 action->arg1 = IP_FW_TARG; 4148 } else { 4149 if (isalpha(*av[0])) { 4150 if ((code = match_token(f_ipdscp, *av)) == -1) 4151 errx(EX_DATAERR, "Unknown DSCP code"); 4152 action->arg1 = code; 4153 } else 4154 action->arg1 = strtoul(*av, NULL, 10); 4155 /* 4156 * Add high-order bit to DSCP to make room 4157 * for tablearg 4158 */ 4159 action->arg1 |= 0x8000; 4160 } 4161 av++; 4162 break; 4163 } 4164 4165 case TOK_REASS: 4166 action->opcode = O_REASS; 4167 break; 4168 4169 case TOK_RETURN: 4170 fill_cmd(action, O_CALLRETURN, F_NOT, 0); 4171 break; 4172 4173 case TOK_TCPSETMSS: { 4174 u_long mss; 4175 uint16_t idx; 4176 4177 idx = pack_object(tstate, "tcp-setmss", IPFW_TLV_EACTION); 4178 if (idx == 0) 4179 errx(EX_DATAERR, "pack_object failed"); 4180 fill_cmd(action, O_EXTERNAL_ACTION, 0, idx); 4181 NEED1("Missing MSS value"); 4182 action = next_cmd(action, &ablen); 4183 action->len = 1; 4184 CHECK_ACTLEN; 4185 mss = strtoul(*av, NULL, 10); 4186 if (mss == 0 || mss > UINT16_MAX) 4187 errx(EX_USAGE, "invalid MSS value %s", *av); 4188 fill_cmd(action, O_EXTERNAL_DATA, 0, (uint16_t)mss); 4189 av++; 4190 break; 4191 } 4192 4193 default: 4194 av--; 4195 if (match_token(rule_eactions, *av) == -1) 4196 errx(EX_DATAERR, "invalid action %s\n", *av); 4197 /* 4198 * External actions support. 4199 * XXX: we support only syntax with instance name. 4200 * For known external actions (from rule_eactions list) 4201 * we can handle syntax directly. But with `eaction' 4202 * keyword we can use only `eaction <name> <instance>' 4203 * syntax. 4204 */ 4205 case TOK_EACTION: { 4206 uint16_t idx; 4207 4208 NEED1("Missing eaction name"); 4209 if (eaction_check_name(*av) != 0) 4210 errx(EX_DATAERR, "Invalid eaction name %s", *av); 4211 idx = pack_object(tstate, *av, IPFW_TLV_EACTION); 4212 if (idx == 0) 4213 errx(EX_DATAERR, "pack_object failed"); 4214 fill_cmd(action, O_EXTERNAL_ACTION, 0, idx); 4215 av++; 4216 NEED1("Missing eaction instance name"); 4217 action = next_cmd(action, &ablen); 4218 action->len = 1; 4219 CHECK_ACTLEN; 4220 if (eaction_check_name(*av) != 0) 4221 errx(EX_DATAERR, "Invalid eaction instance name %s", 4222 *av); 4223 /* 4224 * External action instance object has TLV type depended 4225 * from the external action name object index. Since we 4226 * currently don't know this index, use zero as TLV type. 4227 */ 4228 idx = pack_object(tstate, *av, 0); 4229 if (idx == 0) 4230 errx(EX_DATAERR, "pack_object failed"); 4231 fill_cmd(action, O_EXTERNAL_INSTANCE, 0, idx); 4232 av++; 4233 } 4234 } 4235 action = next_cmd(action, &ablen); 4236 4237 /* 4238 * [altq queuename] -- altq tag, optional 4239 * [log [logamount N]] -- log, optional 4240 * 4241 * If they exist, it go first in the cmdbuf, but then it is 4242 * skipped in the copy section to the end of the buffer. 4243 */ 4244 while (av[0] != NULL && (i = match_token(rule_action_params, *av)) != -1) { 4245 av++; 4246 switch (i) { 4247 case TOK_LOG: 4248 { 4249 ipfw_insn_log *c = (ipfw_insn_log *)cmd; 4250 int l; 4251 4252 if (have_log) 4253 errx(EX_DATAERR, 4254 "log cannot be specified more than once"); 4255 have_log = (ipfw_insn *)c; 4256 cmd->len = F_INSN_SIZE(ipfw_insn_log); 4257 CHECK_CMDLEN; 4258 cmd->opcode = O_LOG; 4259 if (av[0] && _substrcmp(*av, "logamount") == 0) { 4260 av++; 4261 NEED1("logamount requires argument"); 4262 l = atoi(*av); 4263 if (l < 0) 4264 errx(EX_DATAERR, 4265 "logamount must be positive"); 4266 c->max_log = l; 4267 av++; 4268 } else { 4269 len = sizeof(c->max_log); 4270 if (sysctlbyname("net.inet.ip.fw.verbose_limit", 4271 &c->max_log, &len, NULL, 0) == -1) { 4272 if (g_co.test_only) { 4273 c->max_log = 0; 4274 break; 4275 } 4276 errx(1, "sysctlbyname(\"%s\")", 4277 "net.inet.ip.fw.verbose_limit"); 4278 } 4279 } 4280 } 4281 break; 4282 4283 #ifndef NO_ALTQ 4284 case TOK_ALTQ: 4285 { 4286 ipfw_insn_altq *a = (ipfw_insn_altq *)cmd; 4287 4288 NEED1("missing altq queue name"); 4289 if (have_altq) 4290 errx(EX_DATAERR, 4291 "altq cannot be specified more than once"); 4292 have_altq = (ipfw_insn *)a; 4293 cmd->len = F_INSN_SIZE(ipfw_insn_altq); 4294 CHECK_CMDLEN; 4295 cmd->opcode = O_ALTQ; 4296 a->qid = altq_name_to_qid(*av); 4297 av++; 4298 } 4299 break; 4300 #endif 4301 4302 case TOK_TAG: 4303 case TOK_UNTAG: { 4304 uint16_t tag; 4305 4306 if (have_tag) 4307 errx(EX_USAGE, "tag and untag cannot be " 4308 "specified more than once"); 4309 GET_UINT_ARG(tag, IPFW_ARG_MIN, IPFW_ARG_MAX, i, 4310 rule_action_params); 4311 have_tag = cmd; 4312 fill_cmd(cmd, O_TAG, (i == TOK_TAG) ? 0: F_NOT, tag); 4313 av++; 4314 break; 4315 } 4316 4317 default: 4318 abort(); 4319 } 4320 cmd = next_cmd(cmd, &cblen); 4321 } 4322 4323 if (have_state) { /* must be a check-state, we are done */ 4324 if (*av != NULL && 4325 match_token(rule_options, *av) == TOK_COMMENT) { 4326 /* check-state has a comment */ 4327 av++; 4328 fill_comment(cmd, av, cblen); 4329 cmd = next_cmd(cmd, &cblen); 4330 av[0] = NULL; 4331 } 4332 goto done; 4333 } 4334 4335 #define OR_START(target) \ 4336 if (av[0] && (*av[0] == '(' || *av[0] == '{')) { \ 4337 if (open_par) \ 4338 errx(EX_USAGE, "nested \"(\" not allowed\n"); \ 4339 prev = NULL; \ 4340 open_par = 1; \ 4341 if ( (av[0])[1] == '\0') { \ 4342 av++; \ 4343 } else \ 4344 (*av)++; \ 4345 } \ 4346 target: \ 4347 4348 4349 #define CLOSE_PAR \ 4350 if (open_par) { \ 4351 if (av[0] && ( \ 4352 strcmp(*av, ")") == 0 || \ 4353 strcmp(*av, "}") == 0)) { \ 4354 prev = NULL; \ 4355 open_par = 0; \ 4356 av++; \ 4357 } else \ 4358 errx(EX_USAGE, "missing \")\"\n"); \ 4359 } 4360 4361 #define NOT_BLOCK \ 4362 if (av[0] && _substrcmp(*av, "not") == 0) { \ 4363 if (cmd->len & F_NOT) \ 4364 errx(EX_USAGE, "double \"not\" not allowed\n"); \ 4365 cmd->len |= F_NOT; \ 4366 av++; \ 4367 } 4368 4369 #define OR_BLOCK(target) \ 4370 if (av[0] && _substrcmp(*av, "or") == 0) { \ 4371 if (prev == NULL || open_par == 0) \ 4372 errx(EX_DATAERR, "invalid OR block"); \ 4373 prev->len |= F_OR; \ 4374 av++; \ 4375 goto target; \ 4376 } \ 4377 CLOSE_PAR; 4378 4379 first_cmd = cmd; 4380 4381 #if 0 4382 /* 4383 * MAC addresses, optional. 4384 * If we have this, we skip the part "proto from src to dst" 4385 * and jump straight to the option parsing. 4386 */ 4387 NOT_BLOCK; 4388 NEED1("missing protocol"); 4389 if (_substrcmp(*av, "MAC") == 0 || 4390 _substrcmp(*av, "mac") == 0) { 4391 av++; /* the "MAC" keyword */ 4392 add_mac(cmd, av); /* exits in case of errors */ 4393 cmd = next_cmd(cmd); 4394 av += 2; /* dst-mac and src-mac */ 4395 NOT_BLOCK; 4396 NEED1("missing mac type"); 4397 if (add_mactype(cmd, av[0])) 4398 cmd = next_cmd(cmd); 4399 av++; /* any or mac-type */ 4400 goto read_options; 4401 } 4402 #endif 4403 4404 /* 4405 * protocol, mandatory 4406 */ 4407 OR_START(get_proto); 4408 NOT_BLOCK; 4409 NEED1("missing protocol"); 4410 if (add_proto_compat(cmd, *av, &proto)) { 4411 av++; 4412 if (F_LEN(cmd) != 0) { 4413 prev = cmd; 4414 cmd = next_cmd(cmd, &cblen); 4415 } 4416 } else if (first_cmd != cmd) { 4417 errx(EX_DATAERR, "invalid protocol ``%s''", *av); 4418 } else { 4419 rule->flags |= IPFW_RULE_JUSTOPTS; 4420 goto read_options; 4421 } 4422 OR_BLOCK(get_proto); 4423 4424 first_cmd = cmd; /* update pointer to use in compact form */ 4425 4426 /* 4427 * "from", mandatory 4428 */ 4429 if ((av[0] == NULL) || _substrcmp(*av, "from") != 0) 4430 errx(EX_USAGE, "missing ``from''"); 4431 av++; 4432 4433 /* 4434 * source IP, mandatory 4435 */ 4436 OR_START(source_ip); 4437 NOT_BLOCK; /* optional "not" */ 4438 NEED1("missing source address"); 4439 if (add_src(cmd, *av, proto, cblen, tstate)) { 4440 av++; 4441 if (F_LEN(cmd) != 0) { /* ! any */ 4442 prev = cmd; 4443 cmd = next_cmd(cmd, &cblen); 4444 } 4445 } else 4446 errx(EX_USAGE, "bad source address %s", *av); 4447 OR_BLOCK(source_ip); 4448 4449 /* 4450 * source ports, optional 4451 */ 4452 NOT_BLOCK; /* optional "not" */ 4453 if ( av[0] != NULL ) { 4454 if (_substrcmp(*av, "any") == 0 || 4455 add_ports(cmd, *av, proto, O_IP_SRCPORT, cblen)) { 4456 av++; 4457 if (F_LEN(cmd) != 0) 4458 cmd = next_cmd(cmd, &cblen); 4459 } 4460 } 4461 4462 /* 4463 * "to", mandatory 4464 */ 4465 if ( (av[0] == NULL) || _substrcmp(*av, "to") != 0 ) 4466 errx(EX_USAGE, "missing ``to''"); 4467 av++; 4468 4469 /* 4470 * destination, mandatory 4471 */ 4472 OR_START(dest_ip); 4473 NOT_BLOCK; /* optional "not" */ 4474 NEED1("missing dst address"); 4475 if (add_dst(cmd, *av, proto, cblen, tstate)) { 4476 av++; 4477 if (F_LEN(cmd) != 0) { /* ! any */ 4478 prev = cmd; 4479 cmd = next_cmd(cmd, &cblen); 4480 } 4481 } else 4482 errx( EX_USAGE, "bad destination address %s", *av); 4483 OR_BLOCK(dest_ip); 4484 4485 /* 4486 * dest. ports, optional 4487 */ 4488 NOT_BLOCK; /* optional "not" */ 4489 if (av[0]) { 4490 if (_substrcmp(*av, "any") == 0 || 4491 add_ports(cmd, *av, proto, O_IP_DSTPORT, cblen)) { 4492 av++; 4493 if (F_LEN(cmd) != 0) 4494 cmd = next_cmd(cmd, &cblen); 4495 } 4496 } 4497 if (first_cmd == cmd) 4498 rule->flags |= IPFW_RULE_NOOPT; 4499 4500 read_options: 4501 prev = NULL; 4502 while ( av[0] != NULL ) { 4503 char *s; 4504 ipfw_insn_u32 *cmd32; /* alias for cmd */ 4505 4506 s = *av; 4507 cmd32 = (ipfw_insn_u32 *)cmd; 4508 4509 if (*s == '!') { /* alternate syntax for NOT */ 4510 if (cmd->len & F_NOT) 4511 errx(EX_USAGE, "double \"not\" not allowed\n"); 4512 cmd->len = F_NOT; 4513 s++; 4514 } 4515 i = match_token(rule_options, s); 4516 av++; 4517 switch(i) { 4518 case TOK_NOT: 4519 if (cmd->len & F_NOT) 4520 errx(EX_USAGE, "double \"not\" not allowed\n"); 4521 cmd->len = F_NOT; 4522 break; 4523 4524 case TOK_OR: 4525 if (open_par == 0 || prev == NULL) 4526 errx(EX_USAGE, "invalid \"or\" block\n"); 4527 prev->len |= F_OR; 4528 break; 4529 4530 case TOK_STARTBRACE: 4531 if (open_par) 4532 errx(EX_USAGE, "+nested \"(\" not allowed\n"); 4533 open_par = 1; 4534 break; 4535 4536 case TOK_ENDBRACE: 4537 if (!open_par) 4538 errx(EX_USAGE, "+missing \")\"\n"); 4539 open_par = 0; 4540 prev = NULL; 4541 break; 4542 4543 case TOK_IN: 4544 fill_cmd(cmd, O_IN, 0, 0); 4545 break; 4546 4547 case TOK_OUT: 4548 cmd->len ^= F_NOT; /* toggle F_NOT */ 4549 fill_cmd(cmd, O_IN, 0, 0); 4550 break; 4551 4552 case TOK_DIVERTED: 4553 fill_cmd(cmd, O_DIVERTED, 0, 3); 4554 break; 4555 4556 case TOK_DIVERTEDLOOPBACK: 4557 fill_cmd(cmd, O_DIVERTED, 0, 1); 4558 break; 4559 4560 case TOK_DIVERTEDOUTPUT: 4561 fill_cmd(cmd, O_DIVERTED, 0, 2); 4562 break; 4563 4564 case TOK_FRAG: { 4565 uint32_t set = 0, clear = 0; 4566 4567 if (*av != NULL && fill_flags(f_ipoff, *av, NULL, 4568 &set, &clear) == 0) 4569 av++; 4570 else { 4571 /* 4572 * Compatibility: no argument after "frag" 4573 * keyword equals to "frag offset". 4574 */ 4575 set = 0x01; 4576 clear = 0; 4577 } 4578 fill_cmd(cmd, O_FRAG, 0, 4579 (set & 0xff) | ( (clear & 0xff) << 8)); 4580 break; 4581 } 4582 4583 case TOK_LAYER2: 4584 fill_cmd(cmd, O_LAYER2, 0, 0); 4585 break; 4586 4587 case TOK_XMIT: 4588 case TOK_RECV: 4589 case TOK_VIA: 4590 NEED1("recv, xmit, via require interface name" 4591 " or address"); 4592 fill_iface((ipfw_insn_if *)cmd, av[0], cblen, tstate); 4593 av++; 4594 if (F_LEN(cmd) == 0) /* not a valid address */ 4595 break; 4596 if (i == TOK_XMIT) 4597 cmd->opcode = O_XMIT; 4598 else if (i == TOK_RECV) 4599 cmd->opcode = O_RECV; 4600 else if (i == TOK_VIA) 4601 cmd->opcode = O_VIA; 4602 break; 4603 4604 case TOK_ICMPTYPES: 4605 NEED1("icmptypes requires list of types"); 4606 fill_icmptypes((ipfw_insn_u32 *)cmd, *av); 4607 av++; 4608 break; 4609 4610 case TOK_ICMP6TYPES: 4611 NEED1("icmptypes requires list of types"); 4612 fill_icmp6types((ipfw_insn_icmp6 *)cmd, *av, cblen); 4613 av++; 4614 break; 4615 4616 case TOK_IPTTL: 4617 NEED1("ipttl requires TTL"); 4618 if (strpbrk(*av, "-,")) { 4619 if (!add_ports(cmd, *av, 0, O_IPTTL, cblen)) 4620 errx(EX_DATAERR, "invalid ipttl %s", *av); 4621 } else 4622 fill_cmd(cmd, O_IPTTL, 0, strtoul(*av, NULL, 0)); 4623 av++; 4624 break; 4625 4626 case TOK_IPID: 4627 NEED1("ipid requires id"); 4628 if (strpbrk(*av, "-,")) { 4629 if (!add_ports(cmd, *av, 0, O_IPID, cblen)) 4630 errx(EX_DATAERR, "invalid ipid %s", *av); 4631 } else 4632 fill_cmd(cmd, O_IPID, 0, strtoul(*av, NULL, 0)); 4633 av++; 4634 break; 4635 4636 case TOK_IPLEN: 4637 NEED1("iplen requires length"); 4638 if (strpbrk(*av, "-,")) { 4639 if (!add_ports(cmd, *av, 0, O_IPLEN, cblen)) 4640 errx(EX_DATAERR, "invalid ip len %s", *av); 4641 } else 4642 fill_cmd(cmd, O_IPLEN, 0, strtoul(*av, NULL, 0)); 4643 av++; 4644 break; 4645 4646 case TOK_IPVER: 4647 NEED1("ipver requires version"); 4648 fill_cmd(cmd, O_IPVER, 0, strtoul(*av, NULL, 0)); 4649 av++; 4650 break; 4651 4652 case TOK_IPPRECEDENCE: 4653 NEED1("ipprecedence requires value"); 4654 fill_cmd(cmd, O_IPPRECEDENCE, 0, 4655 (strtoul(*av, NULL, 0) & 7) << 5); 4656 av++; 4657 break; 4658 4659 case TOK_DSCP: 4660 NEED1("missing DSCP code"); 4661 fill_dscp(cmd, *av, cblen); 4662 av++; 4663 break; 4664 4665 case TOK_IPOPTS: 4666 NEED1("missing argument for ipoptions"); 4667 fill_flags_cmd(cmd, O_IPOPT, f_ipopts, *av); 4668 av++; 4669 break; 4670 4671 case TOK_IPTOS: 4672 NEED1("missing argument for iptos"); 4673 fill_flags_cmd(cmd, O_IPTOS, f_iptos, *av); 4674 av++; 4675 break; 4676 4677 case TOK_UID: 4678 NEED1("uid requires argument"); 4679 { 4680 char *end; 4681 uid_t uid; 4682 struct passwd *pwd; 4683 4684 cmd->opcode = O_UID; 4685 uid = strtoul(*av, &end, 0); 4686 pwd = (*end == '\0') ? getpwuid(uid) : getpwnam(*av); 4687 if (pwd == NULL) 4688 errx(EX_DATAERR, "uid \"%s\" nonexistent", *av); 4689 cmd32->d[0] = pwd->pw_uid; 4690 cmd->len |= F_INSN_SIZE(ipfw_insn_u32); 4691 av++; 4692 } 4693 break; 4694 4695 case TOK_GID: 4696 NEED1("gid requires argument"); 4697 { 4698 char *end; 4699 gid_t gid; 4700 struct group *grp; 4701 4702 cmd->opcode = O_GID; 4703 gid = strtoul(*av, &end, 0); 4704 grp = (*end == '\0') ? getgrgid(gid) : getgrnam(*av); 4705 if (grp == NULL) 4706 errx(EX_DATAERR, "gid \"%s\" nonexistent", *av); 4707 cmd32->d[0] = grp->gr_gid; 4708 cmd->len |= F_INSN_SIZE(ipfw_insn_u32); 4709 av++; 4710 } 4711 break; 4712 4713 case TOK_JAIL: 4714 NEED1("jail requires argument"); 4715 { 4716 char *end; 4717 int jid; 4718 4719 cmd->opcode = O_JAIL; 4720 /* 4721 * If av is a number, then we'll just pass it as-is. If 4722 * it's a name, try to resolve that to a jid. 4723 * 4724 * We save the jail_getid(3) call for a fallback because 4725 * it entails an unconditional trip to the kernel to 4726 * either validate a jid or resolve a name to a jid. 4727 * This specific token doesn't currently require a 4728 * jid to be an active jail, so we save a transition 4729 * by simply using a number that we're given. 4730 */ 4731 jid = strtoul(*av, &end, 10); 4732 if (*end != '\0') { 4733 jid = jail_getid(*av); 4734 if (jid < 0) 4735 errx(EX_DATAERR, "%s", jail_errmsg); 4736 } 4737 cmd32->d[0] = (uint32_t)jid; 4738 cmd->len |= F_INSN_SIZE(ipfw_insn_u32); 4739 av++; 4740 } 4741 break; 4742 4743 case TOK_ESTAB: 4744 fill_cmd(cmd, O_ESTAB, 0, 0); 4745 break; 4746 4747 case TOK_SETUP: 4748 fill_cmd(cmd, O_TCPFLAGS, 0, 4749 (TH_SYN) | ( (TH_ACK) & 0xff) <<8 ); 4750 break; 4751 4752 case TOK_TCPDATALEN: 4753 NEED1("tcpdatalen requires length"); 4754 if (strpbrk(*av, "-,")) { 4755 if (!add_ports(cmd, *av, 0, O_TCPDATALEN, cblen)) 4756 errx(EX_DATAERR, "invalid tcpdata len %s", *av); 4757 } else 4758 fill_cmd(cmd, O_TCPDATALEN, 0, 4759 strtoul(*av, NULL, 0)); 4760 av++; 4761 break; 4762 4763 case TOK_TCPOPTS: 4764 NEED1("missing argument for tcpoptions"); 4765 fill_flags_cmd(cmd, O_TCPOPTS, f_tcpopts, *av); 4766 av++; 4767 break; 4768 4769 case TOK_TCPSEQ: 4770 case TOK_TCPACK: 4771 NEED1("tcpseq/tcpack requires argument"); 4772 cmd->len = F_INSN_SIZE(ipfw_insn_u32); 4773 cmd->opcode = (i == TOK_TCPSEQ) ? O_TCPSEQ : O_TCPACK; 4774 cmd32->d[0] = htonl(strtoul(*av, NULL, 0)); 4775 av++; 4776 break; 4777 4778 case TOK_TCPMSS: 4779 case TOK_TCPWIN: 4780 NEED1("tcpmss/tcpwin requires size"); 4781 if (strpbrk(*av, "-,")) { 4782 if (add_ports(cmd, *av, 0, 4783 i == TOK_TCPWIN ? O_TCPWIN : O_TCPMSS, 4784 cblen) == NULL) 4785 errx(EX_DATAERR, "invalid %s size %s", 4786 s, *av); 4787 } else 4788 fill_cmd(cmd, i == TOK_TCPWIN ? O_TCPWIN : 4789 O_TCPMSS, 0, strtoul(*av, NULL, 0)); 4790 av++; 4791 break; 4792 4793 case TOK_TCPFLAGS: 4794 NEED1("missing argument for tcpflags"); 4795 cmd->opcode = O_TCPFLAGS; 4796 fill_flags_cmd(cmd, O_TCPFLAGS, f_tcpflags, *av); 4797 av++; 4798 break; 4799 4800 case TOK_KEEPSTATE: 4801 case TOK_RECORDSTATE: { 4802 uint16_t uidx; 4803 4804 if (open_par) 4805 errx(EX_USAGE, "keep-state or record-state cannot be part " 4806 "of an or block"); 4807 if (have_state) 4808 errx(EX_USAGE, "only one of keep-state, record-state, " 4809 " limit and set-limit is allowed"); 4810 if (*av != NULL && *av[0] == ':') { 4811 if (state_check_name(*av + 1) != 0) 4812 errx(EX_DATAERR, 4813 "Invalid state name %s", *av); 4814 uidx = pack_object(tstate, *av + 1, 4815 IPFW_TLV_STATE_NAME); 4816 av++; 4817 } else 4818 uidx = pack_object(tstate, default_state_name, 4819 IPFW_TLV_STATE_NAME); 4820 have_state = cmd; 4821 have_rstate = i == TOK_RECORDSTATE; 4822 fill_cmd(cmd, O_KEEP_STATE, 0, uidx); 4823 break; 4824 } 4825 4826 case TOK_LIMIT: 4827 case TOK_SETLIMIT: { 4828 ipfw_insn_limit *c = (ipfw_insn_limit *)cmd; 4829 int val; 4830 4831 if (open_par) 4832 errx(EX_USAGE, 4833 "limit or set-limit cannot be part of an or block"); 4834 if (have_state) 4835 errx(EX_USAGE, "only one of keep-state, record-state, " 4836 " limit and set-limit is allowed"); 4837 have_state = cmd; 4838 have_rstate = i == TOK_SETLIMIT; 4839 4840 cmd->len = F_INSN_SIZE(ipfw_insn_limit); 4841 CHECK_CMDLEN; 4842 cmd->opcode = O_LIMIT; 4843 c->limit_mask = c->conn_limit = 0; 4844 4845 while ( av[0] != NULL ) { 4846 if ((val = match_token(limit_masks, *av)) <= 0) 4847 break; 4848 c->limit_mask |= val; 4849 av++; 4850 } 4851 4852 if (c->limit_mask == 0) 4853 errx(EX_USAGE, "limit: missing limit mask"); 4854 4855 GET_UINT_ARG(c->conn_limit, IPFW_ARG_MIN, IPFW_ARG_MAX, 4856 TOK_LIMIT, rule_options); 4857 av++; 4858 4859 if (*av != NULL && *av[0] == ':') { 4860 if (state_check_name(*av + 1) != 0) 4861 errx(EX_DATAERR, 4862 "Invalid state name %s", *av); 4863 cmd->arg1 = pack_object(tstate, *av + 1, 4864 IPFW_TLV_STATE_NAME); 4865 av++; 4866 } else 4867 cmd->arg1 = pack_object(tstate, 4868 default_state_name, IPFW_TLV_STATE_NAME); 4869 break; 4870 } 4871 4872 case TOK_PROTO: 4873 NEED1("missing protocol"); 4874 if (add_proto(cmd, *av, &proto)) { 4875 av++; 4876 } else 4877 errx(EX_DATAERR, "invalid protocol ``%s''", 4878 *av); 4879 break; 4880 4881 case TOK_SRCIP: 4882 NEED1("missing source IP"); 4883 if (add_srcip(cmd, *av, cblen, tstate)) { 4884 av++; 4885 } 4886 break; 4887 4888 case TOK_DSTIP: 4889 NEED1("missing destination IP"); 4890 if (add_dstip(cmd, *av, cblen, tstate)) { 4891 av++; 4892 } 4893 break; 4894 4895 case TOK_SRCIP6: 4896 NEED1("missing source IP6"); 4897 if (add_srcip6(cmd, *av, cblen, tstate)) { 4898 av++; 4899 } 4900 break; 4901 4902 case TOK_DSTIP6: 4903 NEED1("missing destination IP6"); 4904 if (add_dstip6(cmd, *av, cblen, tstate)) { 4905 av++; 4906 } 4907 break; 4908 4909 case TOK_SRCPORT: 4910 NEED1("missing source port"); 4911 if (_substrcmp(*av, "any") == 0 || 4912 add_ports(cmd, *av, proto, O_IP_SRCPORT, cblen)) { 4913 av++; 4914 } else 4915 errx(EX_DATAERR, "invalid source port %s", *av); 4916 break; 4917 4918 case TOK_DSTPORT: 4919 NEED1("missing destination port"); 4920 if (_substrcmp(*av, "any") == 0 || 4921 add_ports(cmd, *av, proto, O_IP_DSTPORT, cblen)) { 4922 av++; 4923 } else 4924 errx(EX_DATAERR, "invalid destination port %s", 4925 *av); 4926 break; 4927 4928 case TOK_MAC: 4929 if (add_mac(cmd, av, cblen)) 4930 av += 2; 4931 break; 4932 4933 case TOK_MACTYPE: 4934 NEED1("missing mac type"); 4935 if (!add_mactype(cmd, *av, cblen)) 4936 errx(EX_DATAERR, "invalid mac type %s", *av); 4937 av++; 4938 break; 4939 4940 case TOK_VERREVPATH: 4941 fill_cmd(cmd, O_VERREVPATH, 0, 0); 4942 break; 4943 4944 case TOK_VERSRCREACH: 4945 fill_cmd(cmd, O_VERSRCREACH, 0, 0); 4946 break; 4947 4948 case TOK_ANTISPOOF: 4949 fill_cmd(cmd, O_ANTISPOOF, 0, 0); 4950 break; 4951 4952 case TOK_IPSEC: 4953 fill_cmd(cmd, O_IPSEC, 0, 0); 4954 break; 4955 4956 case TOK_IPV6: 4957 fill_cmd(cmd, O_IP6, 0, 0); 4958 break; 4959 4960 case TOK_IPV4: 4961 fill_cmd(cmd, O_IP4, 0, 0); 4962 break; 4963 4964 case TOK_EXT6HDR: 4965 NEED1("missing extension header"); 4966 fill_ext6hdr( cmd, *av ); 4967 av++; 4968 break; 4969 4970 case TOK_FLOWID: 4971 if (proto != IPPROTO_IPV6 ) 4972 errx( EX_USAGE, "flow-id filter is active " 4973 "only for ipv6 protocol\n"); 4974 fill_flow6( (ipfw_insn_u32 *) cmd, *av, cblen); 4975 av++; 4976 break; 4977 4978 case TOK_COMMENT: 4979 fill_comment(cmd, av, cblen); 4980 av[0]=NULL; 4981 break; 4982 4983 case TOK_TAGGED: 4984 if (av[0] && strpbrk(*av, "-,")) { 4985 if (!add_ports(cmd, *av, 0, O_TAGGED, cblen)) 4986 errx(EX_DATAERR, "tagged: invalid tag" 4987 " list: %s", *av); 4988 } 4989 else { 4990 uint16_t tag; 4991 4992 GET_UINT_ARG(tag, IPFW_ARG_MIN, IPFW_ARG_MAX, 4993 TOK_TAGGED, rule_options); 4994 fill_cmd(cmd, O_TAGGED, 0, tag); 4995 } 4996 av++; 4997 break; 4998 4999 case TOK_FIB: 5000 NEED1("fib requires fib number"); 5001 fill_cmd(cmd, O_FIB, 0, strtoul(*av, NULL, 0)); 5002 av++; 5003 break; 5004 case TOK_SOCKARG: 5005 fill_cmd(cmd, O_SOCKARG, 0, 0); 5006 break; 5007 5008 case TOK_LOOKUP: { 5009 ipfw_insn_u32 *c = (ipfw_insn_u32 *)cmd; 5010 int j; 5011 5012 if (!av[0] || !av[1]) 5013 errx(EX_USAGE, "format: lookup argument tablenum"); 5014 cmd->opcode = O_IP_DST_LOOKUP; 5015 cmd->len |= F_INSN_SIZE(ipfw_insn) + 2; 5016 i = match_token(rule_options, *av); 5017 for (j = 0; lookup_key[j] >= 0 ; j++) { 5018 if (i == lookup_key[j]) 5019 break; 5020 } 5021 if (lookup_key[j] <= 0) 5022 errx(EX_USAGE, "format: cannot lookup on %s", *av); 5023 __PAST_END(c->d, 1) = j; // i converted to option 5024 av++; 5025 5026 if ((j = pack_table(tstate, *av)) == 0) 5027 errx(EX_DATAERR, "Invalid table name: %s", *av); 5028 5029 cmd->arg1 = j; 5030 av++; 5031 } 5032 break; 5033 case TOK_FLOW: 5034 NEED1("missing table name"); 5035 if (strncmp(*av, "table(", 6) != 0) 5036 errx(EX_DATAERR, 5037 "enclose table name into \"table()\""); 5038 fill_table(cmd, *av, O_IP_FLOW_LOOKUP, tstate); 5039 av++; 5040 break; 5041 5042 case TOK_SKIPACTION: 5043 if (have_skipcmd) 5044 errx(EX_USAGE, "only one defer-action " 5045 "is allowed"); 5046 have_skipcmd = cmd; 5047 fill_cmd(cmd, O_SKIP_ACTION, 0, 0); 5048 break; 5049 5050 default: 5051 errx(EX_USAGE, "unrecognised option [%d] %s\n", i, s); 5052 } 5053 if (F_LEN(cmd) > 0) { /* prepare to advance */ 5054 prev = cmd; 5055 cmd = next_cmd(cmd, &cblen); 5056 } 5057 } 5058 5059 done: 5060 5061 if (!have_state && have_skipcmd) 5062 warnx("Rule contains \"defer-immediate-action\" " 5063 "and doesn't contain any state-related options."); 5064 5065 /* 5066 * Now copy stuff into the rule. 5067 * If we have a keep-state option, the first instruction 5068 * must be a PROBE_STATE (which is generated here). 5069 * If we have a LOG option, it was stored as the first command, 5070 * and now must be moved to the top of the action part. 5071 */ 5072 dst = (ipfw_insn *)rule->cmd; 5073 5074 /* 5075 * First thing to write into the command stream is the match probability. 5076 */ 5077 if (match_prob != 1) { /* 1 means always match */ 5078 dst->opcode = O_PROB; 5079 dst->len = 2; 5080 *((int32_t *)(dst+1)) = (int32_t)(match_prob * 0x7fffffff); 5081 dst += dst->len; 5082 } 5083 5084 /* 5085 * generate O_PROBE_STATE if necessary 5086 */ 5087 if (have_state && have_state->opcode != O_CHECK_STATE && !have_rstate) { 5088 fill_cmd(dst, O_PROBE_STATE, 0, have_state->arg1); 5089 dst = next_cmd(dst, &rblen); 5090 } 5091 5092 /* 5093 * copy all commands but O_LOG, O_KEEP_STATE, O_LIMIT, O_ALTQ, O_TAG, 5094 * O_SKIP_ACTION 5095 */ 5096 for (src = (ipfw_insn *)cmdbuf; src != cmd; src += i) { 5097 i = F_LEN(src); 5098 CHECK_RBUFLEN(i); 5099 5100 switch (src->opcode) { 5101 case O_LOG: 5102 case O_KEEP_STATE: 5103 case O_LIMIT: 5104 case O_ALTQ: 5105 case O_TAG: 5106 case O_SKIP_ACTION: 5107 break; 5108 default: 5109 bcopy(src, dst, i * sizeof(uint32_t)); 5110 dst += i; 5111 } 5112 } 5113 5114 /* 5115 * put back the have_state command as last opcode 5116 */ 5117 if (have_state && have_state->opcode != O_CHECK_STATE) { 5118 i = F_LEN(have_state); 5119 CHECK_RBUFLEN(i); 5120 bcopy(have_state, dst, i * sizeof(uint32_t)); 5121 dst += i; 5122 } 5123 5124 /* 5125 * put back the have_skipcmd command as very last opcode 5126 */ 5127 if (have_skipcmd) { 5128 i = F_LEN(have_skipcmd); 5129 CHECK_RBUFLEN(i); 5130 bcopy(have_skipcmd, dst, i * sizeof(uint32_t)); 5131 dst += i; 5132 } 5133 5134 /* 5135 * start action section 5136 */ 5137 rule->act_ofs = dst - rule->cmd; 5138 5139 /* put back O_LOG, O_ALTQ, O_TAG if necessary */ 5140 if (have_log) { 5141 i = F_LEN(have_log); 5142 CHECK_RBUFLEN(i); 5143 bcopy(have_log, dst, i * sizeof(uint32_t)); 5144 dst += i; 5145 } 5146 if (have_altq) { 5147 i = F_LEN(have_altq); 5148 CHECK_RBUFLEN(i); 5149 bcopy(have_altq, dst, i * sizeof(uint32_t)); 5150 dst += i; 5151 } 5152 if (have_tag) { 5153 i = F_LEN(have_tag); 5154 CHECK_RBUFLEN(i); 5155 bcopy(have_tag, dst, i * sizeof(uint32_t)); 5156 dst += i; 5157 } 5158 5159 /* 5160 * copy all other actions 5161 */ 5162 for (src = (ipfw_insn *)actbuf; src != action; src += i) { 5163 i = F_LEN(src); 5164 CHECK_RBUFLEN(i); 5165 bcopy(src, dst, i * sizeof(uint32_t)); 5166 dst += i; 5167 } 5168 5169 rule->cmd_len = (uint32_t *)dst - (uint32_t *)(rule->cmd); 5170 *rbufsize = (char *)dst - (char *)rule; 5171 } 5172 5173 static int 5174 compare_ntlv(const void *_a, const void *_b) 5175 { 5176 const ipfw_obj_ntlv *a, *b; 5177 5178 a = (const ipfw_obj_ntlv *)_a; 5179 b = (const ipfw_obj_ntlv *)_b; 5180 5181 if (a->set < b->set) 5182 return (-1); 5183 else if (a->set > b->set) 5184 return (1); 5185 5186 if (a->idx < b->idx) 5187 return (-1); 5188 else if (a->idx > b->idx) 5189 return (1); 5190 5191 if (a->head.type < b->head.type) 5192 return (-1); 5193 else if (a->head.type > b->head.type) 5194 return (1); 5195 5196 return (0); 5197 } 5198 5199 /* 5200 * Provide kernel with sorted list of referenced objects 5201 */ 5202 static void 5203 object_sort_ctlv(ipfw_obj_ctlv *ctlv) 5204 { 5205 5206 qsort(ctlv + 1, ctlv->count, ctlv->objsize, compare_ntlv); 5207 } 5208 5209 struct object_kt { 5210 uint16_t uidx; 5211 uint16_t type; 5212 }; 5213 static int 5214 compare_object_kntlv(const void *k, const void *v) 5215 { 5216 const ipfw_obj_ntlv *ntlv; 5217 struct object_kt key; 5218 5219 key = *((const struct object_kt *)k); 5220 ntlv = (const ipfw_obj_ntlv *)v; 5221 5222 if (key.uidx < ntlv->idx) 5223 return (-1); 5224 else if (key.uidx > ntlv->idx) 5225 return (1); 5226 5227 if (key.type < ntlv->head.type) 5228 return (-1); 5229 else if (key.type > ntlv->head.type) 5230 return (1); 5231 5232 return (0); 5233 } 5234 5235 /* 5236 * Finds object name in @ctlv by @idx and @type. 5237 * Uses the following facts: 5238 * 1) All TLVs are the same size 5239 * 2) Kernel implementation provides already sorted list. 5240 * 5241 * Returns table name or NULL. 5242 */ 5243 static char * 5244 object_search_ctlv(ipfw_obj_ctlv *ctlv, uint16_t idx, uint16_t type) 5245 { 5246 ipfw_obj_ntlv *ntlv; 5247 struct object_kt key; 5248 5249 key.uidx = idx; 5250 key.type = type; 5251 5252 ntlv = bsearch(&key, (ctlv + 1), ctlv->count, ctlv->objsize, 5253 compare_object_kntlv); 5254 5255 if (ntlv != NULL) 5256 return (ntlv->name); 5257 5258 return (NULL); 5259 } 5260 5261 static char * 5262 table_search_ctlv(ipfw_obj_ctlv *ctlv, uint16_t idx) 5263 { 5264 5265 return (object_search_ctlv(ctlv, idx, IPFW_TLV_TBL_NAME)); 5266 } 5267 5268 /* 5269 * Adds one or more rules to ipfw chain. 5270 * Data layout: 5271 * Request: 5272 * [ 5273 * ip_fw3_opheader 5274 * [ ipfw_obj_ctlv(IPFW_TLV_TBL_LIST) ipfw_obj_ntlv x N ] (optional *1) 5275 * [ ipfw_obj_ctlv(IPFW_TLV_RULE_LIST) [ ip_fw_rule ip_fw_insn ] x N ] (*2) (*3) 5276 * ] 5277 * Reply: 5278 * [ 5279 * ip_fw3_opheader 5280 * [ ipfw_obj_ctlv(IPFW_TLV_TBL_LIST) ipfw_obj_ntlv x N ] (optional) 5281 * [ ipfw_obj_ctlv(IPFW_TLV_RULE_LIST) [ ip_fw_rule ip_fw_insn ] x N ] 5282 * ] 5283 * 5284 * Rules in reply are modified to store their actual ruleset number. 5285 * 5286 * (*1) TLVs inside IPFW_TLV_TBL_LIST needs to be sorted ascending 5287 * according to their idx field and there has to be no duplicates. 5288 * (*2) Numbered rules inside IPFW_TLV_RULE_LIST needs to be sorted ascending. 5289 * (*3) Each ip_fw structure needs to be aligned to u64 boundary. 5290 */ 5291 void 5292 ipfw_add(char *av[]) 5293 { 5294 uint32_t rulebuf[1024]; 5295 int rbufsize, default_off, tlen, rlen; 5296 size_t sz; 5297 struct tidx ts; 5298 struct ip_fw_rule *rule; 5299 caddr_t tbuf; 5300 ip_fw3_opheader *op3; 5301 ipfw_obj_ctlv *ctlv, *tstate; 5302 5303 rbufsize = sizeof(rulebuf); 5304 memset(rulebuf, 0, rbufsize); 5305 memset(&ts, 0, sizeof(ts)); 5306 5307 /* Optimize case with no tables */ 5308 default_off = sizeof(ipfw_obj_ctlv) + sizeof(ip_fw3_opheader); 5309 op3 = (ip_fw3_opheader *)rulebuf; 5310 ctlv = (ipfw_obj_ctlv *)(op3 + 1); 5311 rule = (struct ip_fw_rule *)(ctlv + 1); 5312 rbufsize -= default_off; 5313 5314 compile_rule(av, (uint32_t *)rule, &rbufsize, &ts); 5315 /* Align rule size to u64 boundary */ 5316 rlen = roundup2(rbufsize, sizeof(uint64_t)); 5317 5318 tbuf = NULL; 5319 sz = 0; 5320 tstate = NULL; 5321 if (ts.count != 0) { 5322 /* Some tables. We have to alloc more data */ 5323 tlen = ts.count * sizeof(ipfw_obj_ntlv); 5324 sz = default_off + sizeof(ipfw_obj_ctlv) + tlen + rlen; 5325 5326 if ((tbuf = calloc(1, sz)) == NULL) 5327 err(EX_UNAVAILABLE, "malloc() failed for IP_FW_ADD"); 5328 op3 = (ip_fw3_opheader *)tbuf; 5329 /* Tables first */ 5330 ctlv = (ipfw_obj_ctlv *)(op3 + 1); 5331 ctlv->head.type = IPFW_TLV_TBLNAME_LIST; 5332 ctlv->head.length = sizeof(ipfw_obj_ctlv) + tlen; 5333 ctlv->count = ts.count; 5334 ctlv->objsize = sizeof(ipfw_obj_ntlv); 5335 memcpy(ctlv + 1, ts.idx, tlen); 5336 object_sort_ctlv(ctlv); 5337 tstate = ctlv; 5338 /* Rule next */ 5339 ctlv = (ipfw_obj_ctlv *)((caddr_t)ctlv + ctlv->head.length); 5340 ctlv->head.type = IPFW_TLV_RULE_LIST; 5341 ctlv->head.length = sizeof(ipfw_obj_ctlv) + rlen; 5342 ctlv->count = 1; 5343 memcpy(ctlv + 1, rule, rbufsize); 5344 } else { 5345 /* Simply add header */ 5346 sz = rlen + default_off; 5347 memset(ctlv, 0, sizeof(*ctlv)); 5348 ctlv->head.type = IPFW_TLV_RULE_LIST; 5349 ctlv->head.length = sizeof(ipfw_obj_ctlv) + rlen; 5350 ctlv->count = 1; 5351 } 5352 5353 if (do_get3(IP_FW_XADD, op3, &sz) != 0) 5354 err(EX_UNAVAILABLE, "getsockopt(%s)", "IP_FW_XADD"); 5355 5356 if (!g_co.do_quiet) { 5357 struct format_opts sfo; 5358 struct buf_pr bp; 5359 memset(&sfo, 0, sizeof(sfo)); 5360 sfo.tstate = tstate; 5361 sfo.set_mask = (uint32_t)(-1); 5362 bp_alloc(&bp, 4096); 5363 show_static_rule(&g_co, &sfo, &bp, rule, NULL); 5364 printf("%s", bp.buf); 5365 bp_free(&bp); 5366 } 5367 5368 if (tbuf != NULL) 5369 free(tbuf); 5370 5371 if (ts.idx != NULL) 5372 free(ts.idx); 5373 } 5374 5375 /* 5376 * clear the counters or the log counters. 5377 * optname has the following values: 5378 * 0 (zero both counters and logging) 5379 * 1 (zero logging only) 5380 */ 5381 void 5382 ipfw_zero(int ac, char *av[], int optname) 5383 { 5384 ipfw_range_tlv rt; 5385 char const *errstr; 5386 char const *name = optname ? "RESETLOG" : "ZERO"; 5387 uint32_t arg; 5388 int failed = EX_OK; 5389 5390 optname = optname ? IP_FW_XRESETLOG : IP_FW_XZERO; 5391 av++; ac--; 5392 5393 if (ac == 0) { 5394 /* clear all entries */ 5395 memset(&rt, 0, sizeof(rt)); 5396 rt.flags = IPFW_RCFLAG_ALL; 5397 if (do_range_cmd(optname, &rt) < 0) 5398 err(EX_UNAVAILABLE, "setsockopt(IP_FW_X%s)", name); 5399 if (!g_co.do_quiet) 5400 printf("%s.\n", optname == IP_FW_XZERO ? 5401 "Accounting cleared":"Logging counts reset"); 5402 5403 return; 5404 } 5405 5406 while (ac) { 5407 /* Rule number */ 5408 if (isdigit(**av)) { 5409 arg = strtonum(*av, 0, 0xffff, &errstr); 5410 if (errstr) 5411 errx(EX_DATAERR, 5412 "invalid rule number %s\n", *av); 5413 memset(&rt, 0, sizeof(rt)); 5414 rt.start_rule = arg; 5415 rt.end_rule = arg; 5416 rt.flags |= IPFW_RCFLAG_RANGE; 5417 if (g_co.use_set != 0) { 5418 rt.set = g_co.use_set - 1; 5419 rt.flags |= IPFW_RCFLAG_SET; 5420 } 5421 if (do_range_cmd(optname, &rt) != 0) { 5422 warn("rule %u: setsockopt(IP_FW_X%s)", 5423 arg, name); 5424 failed = EX_UNAVAILABLE; 5425 } else if (rt.new_set == 0) { 5426 printf("Entry %d not found\n", arg); 5427 failed = EX_UNAVAILABLE; 5428 } else if (!g_co.do_quiet) 5429 printf("Entry %d %s.\n", arg, 5430 optname == IP_FW_XZERO ? 5431 "cleared" : "logging count reset"); 5432 } else { 5433 errx(EX_USAGE, "invalid rule number ``%s''", *av); 5434 } 5435 av++; ac--; 5436 } 5437 if (failed != EX_OK) 5438 exit(failed); 5439 } 5440 5441 void 5442 ipfw_flush(int force) 5443 { 5444 ipfw_range_tlv rt; 5445 5446 if (!force && !g_co.do_quiet) { /* need to ask user */ 5447 int c; 5448 5449 printf("Are you sure? [yn] "); 5450 fflush(stdout); 5451 do { 5452 c = toupper(getc(stdin)); 5453 while (c != '\n' && getc(stdin) != '\n') 5454 if (feof(stdin)) 5455 return; /* and do not flush */ 5456 } while (c != 'Y' && c != 'N'); 5457 printf("\n"); 5458 if (c == 'N') /* user said no */ 5459 return; 5460 } 5461 if (g_co.do_pipe) { 5462 dummynet_flush(); 5463 return; 5464 } 5465 /* `ipfw set N flush` - is the same that `ipfw delete set N` */ 5466 memset(&rt, 0, sizeof(rt)); 5467 if (g_co.use_set != 0) { 5468 rt.set = g_co.use_set - 1; 5469 rt.flags = IPFW_RCFLAG_SET; 5470 } else 5471 rt.flags = IPFW_RCFLAG_ALL; 5472 if (do_range_cmd(IP_FW_XDEL, &rt) != 0) 5473 err(EX_UNAVAILABLE, "setsockopt(IP_FW_XDEL)"); 5474 if (!g_co.do_quiet) 5475 printf("Flushed all %s.\n", g_co.do_pipe ? "pipes" : "rules"); 5476 } 5477 5478 static struct _s_x intcmds[] = { 5479 { "talist", TOK_TALIST }, 5480 { "iflist", TOK_IFLIST }, 5481 { "olist", TOK_OLIST }, 5482 { "vlist", TOK_VLIST }, 5483 { NULL, 0 } 5484 }; 5485 5486 static struct _s_x otypes[] = { 5487 { "EACTION", IPFW_TLV_EACTION }, 5488 { "DYNSTATE", IPFW_TLV_STATE_NAME }, 5489 { NULL, 0 } 5490 }; 5491 5492 static const char* 5493 lookup_eaction_name(ipfw_obj_ntlv *ntlv, int cnt, uint16_t type) 5494 { 5495 const char *name; 5496 int i; 5497 5498 name = NULL; 5499 for (i = 0; i < cnt; i++) { 5500 if (ntlv[i].head.type != IPFW_TLV_EACTION) 5501 continue; 5502 if (IPFW_TLV_EACTION_NAME(ntlv[i].idx) != type) 5503 continue; 5504 name = ntlv[i].name; 5505 break; 5506 } 5507 return (name); 5508 } 5509 5510 static void 5511 ipfw_list_objects(int ac __unused, char *av[] __unused) 5512 { 5513 ipfw_obj_lheader req, *olh; 5514 ipfw_obj_ntlv *ntlv; 5515 const char *name; 5516 size_t sz; 5517 uint32_t i; 5518 5519 memset(&req, 0, sizeof(req)); 5520 sz = sizeof(req); 5521 if (do_get3(IP_FW_DUMP_SRVOBJECTS, &req.opheader, &sz) != 0) 5522 if (errno != ENOMEM) 5523 return; 5524 5525 sz = req.size; 5526 if ((olh = calloc(1, sz)) == NULL) 5527 return; 5528 5529 olh->size = sz; 5530 if (do_get3(IP_FW_DUMP_SRVOBJECTS, &olh->opheader, &sz) != 0) { 5531 free(olh); 5532 return; 5533 } 5534 5535 if (olh->count > 0) 5536 printf("Objects list:\n"); 5537 else 5538 printf("There are no objects\n"); 5539 ntlv = (ipfw_obj_ntlv *)(olh + 1); 5540 for (i = 0; i < olh->count; i++) { 5541 name = match_value(otypes, ntlv->head.type); 5542 if (name == NULL) 5543 name = lookup_eaction_name( 5544 (ipfw_obj_ntlv *)(olh + 1), olh->count, 5545 ntlv->head.type); 5546 if (name == NULL) 5547 printf(" kidx: %4d\ttype: %10d\tname: %s\n", 5548 ntlv->idx, ntlv->head.type, ntlv->name); 5549 else 5550 printf(" kidx: %4d\ttype: %10s\tname: %s\n", 5551 ntlv->idx, name, ntlv->name); 5552 ntlv++; 5553 } 5554 free(olh); 5555 } 5556 5557 void 5558 ipfw_internal_handler(int ac, char *av[]) 5559 { 5560 int tcmd; 5561 5562 ac--; av++; 5563 NEED1("internal cmd required"); 5564 5565 if ((tcmd = match_token(intcmds, *av)) == -1) 5566 errx(EX_USAGE, "invalid internal sub-cmd: %s", *av); 5567 5568 switch (tcmd) { 5569 case TOK_IFLIST: 5570 ipfw_list_tifaces(); 5571 break; 5572 case TOK_TALIST: 5573 ipfw_list_ta(ac, av); 5574 break; 5575 case TOK_OLIST: 5576 ipfw_list_objects(ac, av); 5577 break; 5578 case TOK_VLIST: 5579 ipfw_list_values(ac, av); 5580 break; 5581 } 5582 } 5583 5584 static int 5585 ipfw_get_tracked_ifaces(ipfw_obj_lheader **polh) 5586 { 5587 ipfw_obj_lheader req, *olh; 5588 size_t sz; 5589 5590 memset(&req, 0, sizeof(req)); 5591 sz = sizeof(req); 5592 5593 if (do_get3(IP_FW_XIFLIST, &req.opheader, &sz) != 0) { 5594 if (errno != ENOMEM) 5595 return (errno); 5596 } 5597 5598 sz = req.size; 5599 if ((olh = calloc(1, sz)) == NULL) 5600 return (ENOMEM); 5601 5602 olh->size = sz; 5603 if (do_get3(IP_FW_XIFLIST, &olh->opheader, &sz) != 0) { 5604 free(olh); 5605 return (errno); 5606 } 5607 5608 *polh = olh; 5609 return (0); 5610 } 5611 5612 static int 5613 ifinfo_cmp(const void *a, const void *b) 5614 { 5615 const ipfw_iface_info *ia, *ib; 5616 5617 ia = (const ipfw_iface_info *)a; 5618 ib = (const ipfw_iface_info *)b; 5619 5620 return (stringnum_cmp(ia->ifname, ib->ifname)); 5621 } 5622 5623 /* 5624 * Retrieves table list from kernel, 5625 * optionally sorts it and calls requested function for each table. 5626 * Returns 0 on success. 5627 */ 5628 static void 5629 ipfw_list_tifaces(void) 5630 { 5631 ipfw_obj_lheader *olh = NULL; 5632 ipfw_iface_info *info; 5633 uint32_t i; 5634 int error; 5635 5636 if ((error = ipfw_get_tracked_ifaces(&olh)) != 0) 5637 err(EX_OSERR, "Unable to request ipfw tracked interface list"); 5638 5639 qsort(olh + 1, olh->count, olh->objsize, ifinfo_cmp); 5640 5641 info = (ipfw_iface_info *)(olh + 1); 5642 for (i = 0; i < olh->count; i++) { 5643 if (info->flags & IPFW_IFFLAG_RESOLVED) 5644 printf("%s ifindex: %d refcount: %u changes: %u\n", 5645 info->ifname, info->ifindex, info->refcnt, 5646 info->gencnt); 5647 else 5648 printf("%s ifindex: unresolved refcount: %u changes: %u\n", 5649 info->ifname, info->refcnt, info->gencnt); 5650 info = (ipfw_iface_info *)((caddr_t)info + olh->objsize); 5651 } 5652 5653 free(olh); 5654 } 5655