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