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 default: 1622 s = "<unknown>"; 1623 break; 1624 } 1625 bprintf(bp, " %s %u", s, cmd->arg1); 1626 } else 1627 print_newports(bp, insntod(cmd, u16), 0, 1628 cmd->opcode); 1629 break; 1630 case O_IPVER: 1631 bprintf(bp, " ipver %u", cmd->arg1); 1632 break; 1633 case O_IPPRECEDENCE: 1634 bprintf(bp, " ipprecedence %u", cmd->arg1 >> 5); 1635 break; 1636 case O_DSCP: 1637 print_dscp(bp, insntod(cmd, u32)); 1638 break; 1639 case O_IPOPT: 1640 print_flags(bp, "ipoptions", cmd, f_ipopts); 1641 break; 1642 case O_IPTOS: 1643 print_flags(bp, "iptos", cmd, f_iptos); 1644 break; 1645 case O_ICMPTYPE: 1646 print_icmptypes(bp, insntod(cmd, u32)); 1647 break; 1648 case O_ESTAB: 1649 bprintf(bp, " established"); 1650 break; 1651 case O_TCPFLAGS: 1652 print_flags(bp, "tcpflags", cmd, f_tcpflags); 1653 break; 1654 case O_TCPOPTS: 1655 print_flags(bp, "tcpoptions", cmd, f_tcpopts); 1656 break; 1657 case O_TCPACK: 1658 bprintf(bp, " tcpack %d", 1659 ntohl(insntod(cmd, u32)->d[0])); 1660 break; 1661 case O_TCPSEQ: 1662 bprintf(bp, " tcpseq %d", 1663 ntohl(insntod(cmd, u32)->d[0])); 1664 break; 1665 case O_UID: 1666 pwd = getpwuid(insntod(cmd, u32)->d[0]); 1667 if (pwd != NULL) 1668 bprintf(bp, " uid %s", pwd->pw_name); 1669 else 1670 bprintf(bp, " uid %u", 1671 insntod(cmd, u32)->d[0]); 1672 break; 1673 case O_GID: 1674 grp = getgrgid(insntod(cmd, u32)->d[0]); 1675 if (grp != NULL) 1676 bprintf(bp, " gid %s", grp->gr_name); 1677 else 1678 bprintf(bp, " gid %u", 1679 insntod(cmd, u32)->d[0]); 1680 break; 1681 case O_JAIL: 1682 bprintf(bp, " jail %d", insntod(cmd, u32)->d[0]); 1683 break; 1684 case O_VERREVPATH: 1685 bprintf(bp, " verrevpath"); 1686 break; 1687 case O_VERSRCREACH: 1688 bprintf(bp, " versrcreach"); 1689 break; 1690 case O_ANTISPOOF: 1691 bprintf(bp, " antispoof"); 1692 break; 1693 case O_IPSEC: 1694 bprintf(bp, " ipsec"); 1695 break; 1696 case O_NOP: 1697 bprintf(bp, " // %s", (const char *)(cmd + 1)); 1698 break; 1699 case O_KEEP_STATE: 1700 if (state->flags & HAVE_PROBE_STATE) 1701 bprintf(bp, " keep-state"); 1702 else 1703 bprintf(bp, " record-state"); 1704 bprintf(bp, " :%s", 1705 object_search_ctlv(fo->tstate, cmd->arg1, 1706 IPFW_TLV_STATE_NAME)); 1707 break; 1708 case O_LIMIT: 1709 if (state->flags & HAVE_PROBE_STATE) 1710 bprintf(bp, " limit"); 1711 else 1712 bprintf(bp, " set-limit"); 1713 print_limit_mask(bp, insntod(cmd, limit)); 1714 bprintf(bp, " :%s", 1715 object_search_ctlv(fo->tstate, cmd->arg1, 1716 IPFW_TLV_STATE_NAME)); 1717 break; 1718 case O_IP6: 1719 if (state->flags & HAVE_PROTO) 1720 bprintf(bp, " proto"); 1721 bprintf(bp, " ip6"); 1722 break; 1723 case O_IP4: 1724 if (state->flags & HAVE_PROTO) 1725 bprintf(bp, " proto"); 1726 bprintf(bp, " ip4"); 1727 break; 1728 case O_ICMP6TYPE: 1729 print_icmp6types(bp, insntod(cmd, u32)); 1730 break; 1731 case O_EXT_HDR: 1732 print_ext6hdr(bp, cmd); 1733 break; 1734 case O_TAGGED: 1735 if (F_LEN(cmd) == 1) 1736 bprint_uint_arg(bp, " tagged ", cmd->arg1); 1737 else 1738 print_newports(bp, insntod(cmd, u16), 1739 0, O_TAGGED); 1740 break; 1741 case O_SKIP_ACTION: 1742 bprintf(bp, " defer-immediate-action"); 1743 break; 1744 default: 1745 bprintf(bp, " [opcode %d len %d]", cmd->opcode, 1746 cmd->len); 1747 } 1748 if (cmd->len & F_OR) { 1749 bprintf(bp, " or"); 1750 state->or_block = 1; 1751 } else if (state->or_block != 0) { 1752 bprintf(bp, " }"); 1753 state->or_block = 0; 1754 } 1755 mark_printed(state, cmd); 1756 1757 return (1); 1758 } 1759 1760 static ipfw_insn * 1761 print_opcode(struct buf_pr *bp, struct format_opts *fo, 1762 struct show_state *state, int opcode) 1763 { 1764 ipfw_insn *cmd; 1765 int l; 1766 1767 for (l = state->rule->act_ofs, cmd = state->rule->cmd; 1768 l > 0; l -= F_LEN(cmd), cmd += F_LEN(cmd)) { 1769 /* We use zero opcode to print the rest of options */ 1770 if (opcode >= 0 && cmd->opcode != opcode) 1771 continue; 1772 /* 1773 * Skip O_NOP, when we printing the rest 1774 * of options, it will be handled separately. 1775 */ 1776 if (cmd->opcode == O_NOP && opcode != O_NOP) 1777 continue; 1778 if (!print_instruction(bp, fo, state, cmd)) 1779 continue; 1780 return (cmd); 1781 } 1782 return (NULL); 1783 } 1784 1785 static void 1786 print_fwd(struct buf_pr *bp, const ipfw_insn *cmd) 1787 { 1788 char buf[INET6_ADDRSTRLEN + IF_NAMESIZE + 2]; 1789 const ipfw_insn_sa6 *sa6; 1790 const ipfw_insn_sa *sa; 1791 uint16_t port; 1792 1793 if (cmd->opcode == O_FORWARD_IP) { 1794 sa = insntod(cmd, sa); 1795 port = sa->sa.sin_port; 1796 if (sa->sa.sin_addr.s_addr == INADDR_ANY) 1797 bprintf(bp, "fwd tablearg"); 1798 else 1799 bprintf(bp, "fwd %s", inet_ntoa(sa->sa.sin_addr)); 1800 } else { 1801 sa6 = insntod(cmd, sa6); 1802 port = sa6->sa.sin6_port; 1803 bprintf(bp, "fwd "); 1804 if (getnameinfo((const struct sockaddr *)&sa6->sa, 1805 sizeof(struct sockaddr_in6), buf, sizeof(buf), NULL, 0, 1806 NI_NUMERICHOST) == 0) 1807 bprintf(bp, "%s", buf); 1808 } 1809 if (port != 0) 1810 bprintf(bp, ",%u", port); 1811 } 1812 1813 static int 1814 print_action_instruction(struct buf_pr *bp, const struct format_opts *fo, 1815 struct show_state *state, const ipfw_insn *cmd) 1816 { 1817 const char *s; 1818 1819 if (is_printed_opcode(state, cmd)) 1820 return (0); 1821 switch (cmd->opcode) { 1822 case O_CHECK_STATE: 1823 bprintf(bp, "check-state"); 1824 if (cmd->arg1 != 0) 1825 s = object_search_ctlv(fo->tstate, cmd->arg1, 1826 IPFW_TLV_STATE_NAME); 1827 else 1828 s = NULL; 1829 bprintf(bp, " :%s", s ? s: "any"); 1830 break; 1831 case O_ACCEPT: 1832 bprintf(bp, "allow"); 1833 break; 1834 case O_COUNT: 1835 bprintf(bp, "count"); 1836 break; 1837 case O_DENY: 1838 bprintf(bp, "deny"); 1839 break; 1840 case O_REJECT: 1841 if (cmd->arg1 == ICMP_REJECT_RST) 1842 bprintf(bp, "reset"); 1843 else if (cmd->arg1 == ICMP_REJECT_ABORT) 1844 bprintf(bp, "abort"); 1845 else if (cmd->arg1 == ICMP_UNREACH_HOST) 1846 bprintf(bp, "reject"); 1847 else 1848 print_reject_code(bp, cmd->arg1); 1849 break; 1850 case O_UNREACH6: 1851 if (cmd->arg1 == ICMP6_UNREACH_RST) 1852 bprintf(bp, "reset6"); 1853 else if (cmd->arg1 == ICMP6_UNREACH_ABORT) 1854 bprintf(bp, "abort6"); 1855 else 1856 print_unreach6_code(bp, cmd->arg1); 1857 break; 1858 case O_SKIPTO: 1859 bprint_uint_arg(bp, "skipto ", cmd->arg1); 1860 break; 1861 case O_PIPE: 1862 bprint_uint_arg(bp, "pipe ", cmd->arg1); 1863 break; 1864 case O_QUEUE: 1865 bprint_uint_arg(bp, "queue ", cmd->arg1); 1866 break; 1867 case O_DIVERT: 1868 bprint_uint_arg(bp, "divert ", cmd->arg1); 1869 break; 1870 case O_TEE: 1871 bprint_uint_arg(bp, "tee ", cmd->arg1); 1872 break; 1873 case O_NETGRAPH: 1874 bprint_uint_arg(bp, "netgraph ", cmd->arg1); 1875 break; 1876 case O_NGTEE: 1877 bprint_uint_arg(bp, "ngtee ", cmd->arg1); 1878 break; 1879 case O_FORWARD_IP: 1880 case O_FORWARD_IP6: 1881 print_fwd(bp, cmd); 1882 break; 1883 case O_LOG: 1884 if (insntod(cmd, log)->max_log > 0) 1885 bprintf(bp, " log logamount %d", 1886 insntod(cmd, log)->max_log); 1887 else 1888 bprintf(bp, " log"); 1889 break; 1890 case O_ALTQ: 1891 #ifndef NO_ALTQ 1892 print_altq_cmd(bp, insntod(cmd, altq)); 1893 #endif 1894 break; 1895 case O_TAG: 1896 bprint_uint_arg(bp, cmd->len & F_NOT ? " untag ": 1897 " tag ", cmd->arg1); 1898 break; 1899 case O_NAT: 1900 if (cmd->arg1 != IP_FW_NAT44_GLOBAL) 1901 bprint_uint_arg(bp, "nat ", cmd->arg1); 1902 else 1903 bprintf(bp, "nat global"); 1904 break; 1905 case O_SETFIB: 1906 if (cmd->arg1 == IP_FW_TARG) 1907 bprint_uint_arg(bp, "setfib ", cmd->arg1); 1908 else 1909 bprintf(bp, "setfib %u", cmd->arg1 & 0x7FFF); 1910 break; 1911 case O_EXTERNAL_ACTION: 1912 /* 1913 * The external action can consists of two following 1914 * each other opcodes - O_EXTERNAL_ACTION and 1915 * O_EXTERNAL_INSTANCE. The first contains the ID of 1916 * name of external action. The second contains the ID 1917 * of name of external action instance. 1918 * NOTE: in case when external action has no named 1919 * instances support, the second opcode isn't needed. 1920 */ 1921 state->eaction = cmd; 1922 s = object_search_ctlv(fo->tstate, cmd->arg1, 1923 IPFW_TLV_EACTION); 1924 if (match_token(rule_eactions, s) != -1) 1925 bprintf(bp, "%s", s); 1926 else 1927 bprintf(bp, "eaction %s", s); 1928 break; 1929 case O_EXTERNAL_INSTANCE: 1930 if (state->eaction == NULL) 1931 break; 1932 /* 1933 * XXX: we need to teach ipfw(9) to rewrite opcodes 1934 * in the user buffer on rule addition. When we add 1935 * the rule, we specify zero TLV type for 1936 * O_EXTERNAL_INSTANCE object. To show correct 1937 * rule after `ipfw add` we need to search instance 1938 * name with zero type. But when we do `ipfw show` 1939 * we calculate TLV type using IPFW_TLV_EACTION_NAME() 1940 * macro. 1941 */ 1942 s = object_search_ctlv(fo->tstate, cmd->arg1, 0); 1943 if (s == NULL) 1944 s = object_search_ctlv(fo->tstate, 1945 cmd->arg1, IPFW_TLV_EACTION_NAME( 1946 state->eaction->arg1)); 1947 bprintf(bp, " %s", s); 1948 break; 1949 case O_EXTERNAL_DATA: 1950 if (state->eaction == NULL) 1951 break; 1952 /* 1953 * Currently we support data formatting only for 1954 * external data with datalen u16. For unknown data 1955 * print its size in bytes. 1956 */ 1957 if (cmd->len == F_INSN_SIZE(ipfw_insn)) 1958 bprintf(bp, " %u", cmd->arg1); 1959 else 1960 bprintf(bp, " %ubytes", 1961 cmd->len * sizeof(uint32_t)); 1962 break; 1963 case O_SETDSCP: 1964 if (cmd->arg1 == IP_FW_TARG) { 1965 bprintf(bp, "setdscp tablearg"); 1966 break; 1967 } 1968 s = match_value(f_ipdscp, cmd->arg1 & 0x3F); 1969 if (s != NULL) 1970 bprintf(bp, "setdscp %s", s); 1971 else 1972 bprintf(bp, "setdscp %u", cmd->arg1 & 0x3F); 1973 break; 1974 case O_REASS: 1975 bprintf(bp, "reass"); 1976 break; 1977 case O_CALLRETURN: 1978 if (cmd->len & F_NOT) 1979 bprintf(bp, "return"); 1980 else 1981 bprint_uint_arg(bp, "call ", cmd->arg1); 1982 break; 1983 default: 1984 bprintf(bp, "** unrecognized action %d len %d ", 1985 cmd->opcode, cmd->len); 1986 } 1987 mark_printed(state, cmd); 1988 1989 return (1); 1990 } 1991 1992 1993 static ipfw_insn * 1994 print_action(struct buf_pr *bp, struct format_opts *fo, 1995 struct show_state *state, uint8_t opcode) 1996 { 1997 ipfw_insn *cmd; 1998 int l; 1999 2000 for (l = state->rule->cmd_len - state->rule->act_ofs, 2001 cmd = ACTION_PTR(state->rule); l > 0; 2002 l -= F_LEN(cmd), cmd += F_LEN(cmd)) { 2003 if (cmd->opcode != opcode) 2004 continue; 2005 if (!print_action_instruction(bp, fo, state, cmd)) 2006 continue; 2007 return (cmd); 2008 } 2009 return (NULL); 2010 } 2011 2012 static void 2013 print_proto(struct buf_pr *bp, struct format_opts *fo, 2014 struct show_state *state) 2015 { 2016 ipfw_insn *cmd; 2017 int l, proto, ip4, ip6; 2018 2019 /* Count all O_PROTO, O_IP4, O_IP6 instructions. */ 2020 proto = ip4 = ip6 = 0; 2021 for (l = state->rule->act_ofs, cmd = state->rule->cmd; 2022 l > 0; l -= F_LEN(cmd), cmd += F_LEN(cmd)) { 2023 switch (cmd->opcode) { 2024 case O_PROTO: 2025 proto++; 2026 break; 2027 case O_IP4: 2028 ip4 = 1; 2029 if (cmd->len & F_OR) 2030 ip4++; 2031 break; 2032 case O_IP6: 2033 ip6 = 1; 2034 if (cmd->len & F_OR) 2035 ip6++; 2036 break; 2037 default: 2038 continue; 2039 } 2040 } 2041 if (proto == 0 && ip4 == 0 && ip6 == 0) { 2042 state->proto = IPPROTO_IP; 2043 state->flags |= HAVE_PROTO; 2044 bprintf(bp, " ip"); 2045 return; 2046 } 2047 /* To handle the case { ip4 or ip6 }, print opcode with F_OR first */ 2048 cmd = NULL; 2049 if (ip4 || ip6) 2050 cmd = print_opcode(bp, fo, state, ip4 > ip6 ? O_IP4: O_IP6); 2051 if (cmd != NULL && (cmd->len & F_OR)) 2052 cmd = print_opcode(bp, fo, state, ip4 > ip6 ? O_IP6: O_IP4); 2053 if (cmd == NULL || (cmd->len & F_OR)) 2054 for (l = proto; l > 0; l--) { 2055 cmd = print_opcode(bp, fo, state, O_PROTO); 2056 if (cmd == NULL || (cmd->len & F_OR) == 0) 2057 break; 2058 } 2059 /* Initialize proto, it is used by print_newports() */ 2060 state->flags |= HAVE_PROTO; 2061 if (state->proto == 0 && ip6 != 0) 2062 state->proto = IPPROTO_IPV6; 2063 } 2064 2065 static int 2066 match_opcode(int opcode, const int opcodes[], size_t nops) 2067 { 2068 size_t i; 2069 2070 for (i = 0; i < nops; i++) 2071 if (opcode == opcodes[i]) 2072 return (1); 2073 return (0); 2074 } 2075 2076 static void 2077 print_address(struct buf_pr *bp, struct format_opts *fo, 2078 struct show_state *state, const int opcodes[], size_t nops, int portop, 2079 int flag) 2080 { 2081 ipfw_insn *cmd; 2082 int count, l, portcnt, pf; 2083 2084 count = portcnt = 0; 2085 for (l = state->rule->act_ofs, cmd = state->rule->cmd; 2086 l > 0; l -= F_LEN(cmd), cmd += F_LEN(cmd)) { 2087 if (match_opcode(cmd->opcode, opcodes, nops)) 2088 count++; 2089 else if (cmd->opcode == portop) 2090 portcnt++; 2091 } 2092 if (count == 0) 2093 bprintf(bp, " any"); 2094 for (l = state->rule->act_ofs, cmd = state->rule->cmd; 2095 l > 0 && count > 0; l -= F_LEN(cmd), cmd += F_LEN(cmd)) { 2096 if (!match_opcode(cmd->opcode, opcodes, nops)) 2097 continue; 2098 print_instruction(bp, fo, state, cmd); 2099 if ((cmd->len & F_OR) == 0) 2100 break; 2101 count--; 2102 } 2103 /* 2104 * If several O_IP_?PORT opcodes specified, leave them to the 2105 * options section. 2106 */ 2107 if (portcnt == 1) { 2108 for (l = state->rule->act_ofs, cmd = state->rule->cmd, pf = 0; 2109 l > 0; l -= F_LEN(cmd), cmd += F_LEN(cmd)) { 2110 if (cmd->opcode != portop) { 2111 pf = (cmd->len & F_OR); 2112 continue; 2113 } 2114 /* Print opcode iff it is not in OR block. */ 2115 if (pf == 0 && (cmd->len & F_OR) == 0) 2116 print_instruction(bp, fo, state, cmd); 2117 break; 2118 } 2119 } 2120 state->flags |= flag; 2121 } 2122 2123 static const int action_opcodes[] = { 2124 O_CHECK_STATE, O_ACCEPT, O_COUNT, O_DENY, O_REJECT, 2125 O_UNREACH6, O_SKIPTO, O_PIPE, O_QUEUE, O_DIVERT, O_TEE, 2126 O_NETGRAPH, O_NGTEE, O_FORWARD_IP, O_FORWARD_IP6, O_NAT, 2127 O_SETFIB, O_SETDSCP, O_REASS, O_CALLRETURN, 2128 /* keep the following opcodes at the end of the list */ 2129 O_EXTERNAL_ACTION, O_EXTERNAL_INSTANCE, O_EXTERNAL_DATA 2130 }; 2131 2132 static const int modifier_opcodes[] = { 2133 O_LOG, O_ALTQ, O_TAG 2134 }; 2135 2136 static const int src_opcodes[] = { 2137 O_IP_SRC, O_IP_SRC_LOOKUP, O_IP_SRC_MASK, O_IP_SRC_ME, 2138 O_IP_SRC_SET, O_IP6_SRC, O_IP6_SRC_MASK, O_IP6_SRC_ME 2139 }; 2140 2141 static const int dst_opcodes[] = { 2142 O_IP_DST, O_IP_DST_LOOKUP, O_IP_DST_MASK, O_IP_DST_ME, 2143 O_IP_DST_SET, O_IP6_DST, O_IP6_DST_MASK, O_IP6_DST_ME 2144 }; 2145 2146 static void 2147 show_static_rule(struct cmdline_opts *co, struct format_opts *fo, 2148 struct buf_pr *bp, struct ip_fw_rule *rule, struct ip_fw_bcounter *cntr) 2149 { 2150 static int twidth = 0; 2151 struct show_state state; 2152 ipfw_insn *cmd; 2153 size_t i; 2154 2155 /* Print # DISABLED or skip the rule */ 2156 if ((fo->set_mask & (1 << rule->set)) == 0) { 2157 /* disabled mask */ 2158 if (!co->show_sets) 2159 return; 2160 else 2161 bprintf(bp, "# DISABLED "); 2162 } 2163 if (init_show_state(&state, rule) != 0) { 2164 warn("init_show_state() failed"); 2165 return; 2166 } 2167 bprintf(bp, "%05u ", rule->rulenum); 2168 2169 /* Print counters if enabled */ 2170 if (fo->pcwidth > 0 || fo->bcwidth > 0) { 2171 pr_u64(bp, &cntr->pcnt, fo->pcwidth); 2172 pr_u64(bp, &cntr->bcnt, fo->bcwidth); 2173 } 2174 2175 /* Print timestamp */ 2176 if (co->do_time == TIMESTAMP_NUMERIC) 2177 bprintf(bp, "%10u ", cntr->timestamp); 2178 else if (co->do_time == TIMESTAMP_STRING) { 2179 char timestr[30]; 2180 time_t t = (time_t)0; 2181 2182 if (twidth == 0) { 2183 strcpy(timestr, ctime(&t)); 2184 *strchr(timestr, '\n') = '\0'; 2185 twidth = strlen(timestr); 2186 } 2187 if (cntr->timestamp > 0) { 2188 t = _long_to_time(cntr->timestamp); 2189 2190 strcpy(timestr, ctime(&t)); 2191 *strchr(timestr, '\n') = '\0'; 2192 bprintf(bp, "%s ", timestr); 2193 } else { 2194 bprintf(bp, "%*s", twidth, " "); 2195 } 2196 } 2197 2198 /* Print set number */ 2199 if (co->show_sets) 2200 bprintf(bp, "set %d ", rule->set); 2201 2202 /* Print the optional "match probability" */ 2203 cmd = print_opcode(bp, fo, &state, O_PROB); 2204 /* Print rule action */ 2205 for (i = 0; i < nitems(action_opcodes); i++) { 2206 cmd = print_action(bp, fo, &state, action_opcodes[i]); 2207 if (cmd == NULL) 2208 continue; 2209 /* Handle special cases */ 2210 switch (cmd->opcode) { 2211 case O_CHECK_STATE: 2212 goto end; 2213 case O_EXTERNAL_ACTION: 2214 case O_EXTERNAL_INSTANCE: 2215 /* External action can have several instructions */ 2216 continue; 2217 } 2218 break; 2219 } 2220 /* Print rule modifiers */ 2221 for (i = 0; i < nitems(modifier_opcodes); i++) 2222 print_action(bp, fo, &state, modifier_opcodes[i]); 2223 /* 2224 * Print rule body 2225 */ 2226 if (co->comment_only != 0) 2227 goto end; 2228 2229 if (rule->flags & IPFW_RULE_JUSTOPTS) { 2230 state.flags |= HAVE_PROTO | HAVE_SRCIP | HAVE_DSTIP; 2231 goto justopts; 2232 } 2233 2234 print_proto(bp, fo, &state); 2235 if (co->do_compact != 0 && (rule->flags & IPFW_RULE_NOOPT)) 2236 goto justopts; 2237 2238 /* Print source */ 2239 bprintf(bp, " from"); 2240 print_address(bp, fo, &state, src_opcodes, nitems(src_opcodes), 2241 O_IP_SRCPORT, HAVE_SRCIP); 2242 2243 /* Print destination */ 2244 bprintf(bp, " to"); 2245 print_address(bp, fo, &state, dst_opcodes, nitems(dst_opcodes), 2246 O_IP_DSTPORT, HAVE_DSTIP); 2247 2248 justopts: 2249 /* Print the rest of options */ 2250 while (print_opcode(bp, fo, &state, -1)) 2251 ; 2252 end: 2253 /* Print comment at the end */ 2254 cmd = print_opcode(bp, fo, &state, O_NOP); 2255 if (co->comment_only != 0 && cmd == NULL) 2256 bprintf(bp, " // ..."); 2257 bprintf(bp, "\n"); 2258 free_show_state(&state); 2259 } 2260 2261 static void 2262 show_dyn_state(struct cmdline_opts *co, struct format_opts *fo, 2263 struct buf_pr *bp, ipfw_dyn_rule *d) 2264 { 2265 struct protoent *pe; 2266 struct in_addr a; 2267 uint16_t rulenum; 2268 char buf[INET6_ADDRSTRLEN]; 2269 2270 if (d->expire == 0 && d->dyn_type != O_LIMIT_PARENT) 2271 return; 2272 2273 bcopy(&d->rule, &rulenum, sizeof(rulenum)); 2274 bprintf(bp, "%05d", rulenum); 2275 if (fo->pcwidth > 0 || fo->bcwidth > 0) { 2276 bprintf(bp, " "); 2277 pr_u64(bp, &d->pcnt, fo->pcwidth); 2278 pr_u64(bp, &d->bcnt, fo->bcwidth); 2279 bprintf(bp, "(%ds)", d->expire); 2280 } 2281 switch (d->dyn_type) { 2282 case O_LIMIT_PARENT: 2283 bprintf(bp, " PARENT %d", d->count); 2284 break; 2285 case O_LIMIT: 2286 bprintf(bp, " LIMIT"); 2287 break; 2288 case O_KEEP_STATE: /* bidir, no mask */ 2289 bprintf(bp, " STATE"); 2290 break; 2291 } 2292 2293 if ((pe = getprotobynumber(d->id.proto)) != NULL) 2294 bprintf(bp, " %s", pe->p_name); 2295 else 2296 bprintf(bp, " proto %u", d->id.proto); 2297 2298 if (d->id.addr_type == 4) { 2299 a.s_addr = htonl(d->id.src_ip); 2300 bprintf(bp, " %s %d", inet_ntoa(a), d->id.src_port); 2301 2302 a.s_addr = htonl(d->id.dst_ip); 2303 bprintf(bp, " <-> %s %d", inet_ntoa(a), d->id.dst_port); 2304 } else if (d->id.addr_type == 6) { 2305 bprintf(bp, " %s %d", inet_ntop(AF_INET6, &d->id.src_ip6, buf, 2306 sizeof(buf)), d->id.src_port); 2307 bprintf(bp, " <-> %s %d", inet_ntop(AF_INET6, &d->id.dst_ip6, 2308 buf, sizeof(buf)), d->id.dst_port); 2309 } else 2310 bprintf(bp, " UNKNOWN <-> UNKNOWN"); 2311 if (d->kidx != 0) 2312 bprintf(bp, " :%s", object_search_ctlv(fo->tstate, 2313 d->kidx, IPFW_TLV_STATE_NAME)); 2314 2315 #define BOTH_SYN (TH_SYN | (TH_SYN << 8)) 2316 #define BOTH_FIN (TH_FIN | (TH_FIN << 8)) 2317 if (co->verbose) { 2318 bprintf(bp, " state 0x%08x%s", d->state, 2319 d->state ? " ": ","); 2320 if (d->state & IPFW_DYN_ORPHANED) 2321 bprintf(bp, "ORPHANED,"); 2322 if ((d->state & BOTH_SYN) == BOTH_SYN) 2323 bprintf(bp, "BOTH_SYN,"); 2324 else { 2325 if (d->state & TH_SYN) 2326 bprintf(bp, "F_SYN,"); 2327 if (d->state & (TH_SYN << 8)) 2328 bprintf(bp, "R_SYN,"); 2329 } 2330 if ((d->state & BOTH_FIN) == BOTH_FIN) 2331 bprintf(bp, "BOTH_FIN,"); 2332 else { 2333 if (d->state & TH_FIN) 2334 bprintf(bp, "F_FIN,"); 2335 if (d->state & (TH_FIN << 8)) 2336 bprintf(bp, "R_FIN,"); 2337 } 2338 bprintf(bp, " f_ack 0x%x, r_ack 0x%x", d->ack_fwd, 2339 d->ack_rev); 2340 } 2341 } 2342 2343 static int 2344 do_range_cmd(int cmd, ipfw_range_tlv *rt) 2345 { 2346 ipfw_range_header rh; 2347 size_t sz; 2348 2349 memset(&rh, 0, sizeof(rh)); 2350 memcpy(&rh.range, rt, sizeof(*rt)); 2351 rh.range.head.length = sizeof(*rt); 2352 rh.range.head.type = IPFW_TLV_RANGE; 2353 sz = sizeof(rh); 2354 2355 if (do_get3(cmd, &rh.opheader, &sz) != 0) 2356 return (-1); 2357 /* Save number of matched objects */ 2358 rt->new_set = rh.range.new_set; 2359 return (0); 2360 } 2361 2362 /* 2363 * This one handles all set-related commands 2364 * ipfw set { show | enable | disable } 2365 * ipfw set swap X Y 2366 * ipfw set move X to Y 2367 * ipfw set move rule X to Y 2368 */ 2369 void 2370 ipfw_sets_handler(char *av[]) 2371 { 2372 ipfw_range_tlv rt; 2373 const char *msg; 2374 size_t size; 2375 uint32_t masks[2]; 2376 int i; 2377 uint16_t rulenum; 2378 uint8_t cmd; 2379 2380 av++; 2381 memset(&rt, 0, sizeof(rt)); 2382 2383 if (av[0] == NULL) 2384 errx(EX_USAGE, "set needs command"); 2385 if (_substrcmp(*av, "show") == 0) { 2386 struct format_opts fo; 2387 ipfw_cfg_lheader *cfg; 2388 2389 memset(&fo, 0, sizeof(fo)); 2390 if (ipfw_get_config(&g_co, &fo, &cfg, &size) != 0) 2391 err(EX_OSERR, "requesting config failed"); 2392 2393 for (i = 0, msg = "disable"; i < RESVD_SET; i++) 2394 if ((cfg->set_mask & (1<<i)) == 0) { 2395 printf("%s %d", msg, i); 2396 msg = ""; 2397 } 2398 msg = (cfg->set_mask != (uint32_t)-1) ? " enable" : "enable"; 2399 for (i = 0; i < RESVD_SET; i++) 2400 if ((cfg->set_mask & (1<<i)) != 0) { 2401 printf("%s %d", msg, i); 2402 msg = ""; 2403 } 2404 printf("\n"); 2405 free(cfg); 2406 } else if (_substrcmp(*av, "swap") == 0) { 2407 av++; 2408 if ( av[0] == NULL || av[1] == NULL ) 2409 errx(EX_USAGE, "set swap needs 2 set numbers\n"); 2410 rt.set = atoi(av[0]); 2411 rt.new_set = atoi(av[1]); 2412 if (!isdigit(*(av[0])) || rt.set > RESVD_SET) 2413 errx(EX_DATAERR, "invalid set number %s\n", av[0]); 2414 if (!isdigit(*(av[1])) || rt.new_set > RESVD_SET) 2415 errx(EX_DATAERR, "invalid set number %s\n", av[1]); 2416 i = do_range_cmd(IP_FW_SET_SWAP, &rt); 2417 } else if (_substrcmp(*av, "move") == 0) { 2418 av++; 2419 if (av[0] && _substrcmp(*av, "rule") == 0) { 2420 rt.flags = IPFW_RCFLAG_RANGE; /* move rules to new set */ 2421 cmd = IP_FW_XMOVE; 2422 av++; 2423 } else 2424 cmd = IP_FW_SET_MOVE; /* Move set to new one */ 2425 if (av[0] == NULL || av[1] == NULL || av[2] == NULL || 2426 av[3] != NULL || _substrcmp(av[1], "to") != 0) 2427 errx(EX_USAGE, "syntax: set move [rule] X to Y\n"); 2428 rulenum = atoi(av[0]); 2429 rt.new_set = atoi(av[2]); 2430 if (cmd == IP_FW_XMOVE) { 2431 rt.start_rule = rulenum; 2432 rt.end_rule = rulenum; 2433 } else 2434 rt.set = rulenum; 2435 rt.new_set = atoi(av[2]); 2436 if (!isdigit(*(av[0])) || (cmd == 3 && rt.set > RESVD_SET) || 2437 (cmd == 2 && rt.start_rule == IPFW_DEFAULT_RULE) ) 2438 errx(EX_DATAERR, "invalid source number %s\n", av[0]); 2439 if (!isdigit(*(av[2])) || rt.new_set > RESVD_SET) 2440 errx(EX_DATAERR, "invalid dest. set %s\n", av[1]); 2441 i = do_range_cmd(cmd, &rt); 2442 if (i < 0) 2443 err(EX_OSERR, "failed to move %s", 2444 cmd == IP_FW_SET_MOVE ? "set": "rule"); 2445 } else if (_substrcmp(*av, "disable") == 0 || 2446 _substrcmp(*av, "enable") == 0 ) { 2447 int which = _substrcmp(*av, "enable") == 0 ? 1 : 0; 2448 2449 av++; 2450 masks[0] = masks[1] = 0; 2451 2452 while (av[0]) { 2453 if (isdigit(**av)) { 2454 i = atoi(*av); 2455 if (i < 0 || i > RESVD_SET) 2456 errx(EX_DATAERR, 2457 "invalid set number %d\n", i); 2458 masks[which] |= (1<<i); 2459 } else if (_substrcmp(*av, "disable") == 0) 2460 which = 0; 2461 else if (_substrcmp(*av, "enable") == 0) 2462 which = 1; 2463 else 2464 errx(EX_DATAERR, 2465 "invalid set command %s\n", *av); 2466 av++; 2467 } 2468 if ( (masks[0] & masks[1]) != 0 ) 2469 errx(EX_DATAERR, 2470 "cannot enable and disable the same set\n"); 2471 2472 rt.set = masks[0]; 2473 rt.new_set = masks[1]; 2474 i = do_range_cmd(IP_FW_SET_ENABLE, &rt); 2475 if (i) 2476 warn("set enable/disable: setsockopt(IP_FW_SET_ENABLE)"); 2477 } else 2478 errx(EX_USAGE, "invalid set command %s\n", *av); 2479 } 2480 2481 void 2482 ipfw_sysctl_handler(char *av[], int which) 2483 { 2484 av++; 2485 2486 if (av[0] == NULL) { 2487 warnx("missing keyword to enable/disable\n"); 2488 } else if (_substrcmp(*av, "firewall") == 0) { 2489 sysctlbyname("net.inet.ip.fw.enable", NULL, 0, 2490 &which, sizeof(which)); 2491 sysctlbyname("net.inet6.ip6.fw.enable", NULL, 0, 2492 &which, sizeof(which)); 2493 } else if (_substrcmp(*av, "one_pass") == 0) { 2494 sysctlbyname("net.inet.ip.fw.one_pass", NULL, 0, 2495 &which, sizeof(which)); 2496 } else if (_substrcmp(*av, "debug") == 0) { 2497 sysctlbyname("net.inet.ip.fw.debug", NULL, 0, 2498 &which, sizeof(which)); 2499 } else if (_substrcmp(*av, "verbose") == 0) { 2500 sysctlbyname("net.inet.ip.fw.verbose", NULL, 0, 2501 &which, sizeof(which)); 2502 } else if (_substrcmp(*av, "dyn_keepalive") == 0) { 2503 sysctlbyname("net.inet.ip.fw.dyn_keepalive", NULL, 0, 2504 &which, sizeof(which)); 2505 #ifndef NO_ALTQ 2506 } else if (_substrcmp(*av, "altq") == 0) { 2507 altq_set_enabled(which); 2508 #endif 2509 } else { 2510 warnx("unrecognize enable/disable keyword: %s\n", *av); 2511 } 2512 } 2513 2514 typedef void state_cb(struct cmdline_opts *co, struct format_opts *fo, 2515 void *arg, void *state); 2516 2517 static void 2518 prepare_format_dyn(struct cmdline_opts *co, struct format_opts *fo, 2519 void *arg __unused, void *_state) 2520 { 2521 ipfw_dyn_rule *d; 2522 int width; 2523 uint8_t set; 2524 2525 d = (ipfw_dyn_rule *)_state; 2526 /* Count _ALL_ states */ 2527 fo->dcnt++; 2528 2529 if (fo->show_counters == 0) 2530 return; 2531 2532 if (co->use_set) { 2533 /* skip states from another set */ 2534 bcopy((char *)&d->rule + sizeof(uint16_t), &set, 2535 sizeof(uint8_t)); 2536 if (set != co->use_set - 1) 2537 return; 2538 } 2539 2540 width = pr_u64(NULL, &d->pcnt, 0); 2541 if (width > fo->pcwidth) 2542 fo->pcwidth = width; 2543 2544 width = pr_u64(NULL, &d->bcnt, 0); 2545 if (width > fo->bcwidth) 2546 fo->bcwidth = width; 2547 } 2548 2549 static int 2550 foreach_state(struct cmdline_opts *co, struct format_opts *fo, 2551 caddr_t base, size_t sz, state_cb dyn_bc, void *dyn_arg) 2552 { 2553 int ttype; 2554 state_cb *fptr; 2555 void *farg; 2556 ipfw_obj_tlv *tlv; 2557 ipfw_obj_ctlv *ctlv; 2558 2559 fptr = NULL; 2560 ttype = 0; 2561 2562 while (sz > 0) { 2563 ctlv = (ipfw_obj_ctlv *)base; 2564 switch (ctlv->head.type) { 2565 case IPFW_TLV_DYNSTATE_LIST: 2566 base += sizeof(*ctlv); 2567 sz -= sizeof(*ctlv); 2568 ttype = IPFW_TLV_DYN_ENT; 2569 fptr = dyn_bc; 2570 farg = dyn_arg; 2571 break; 2572 default: 2573 return (sz); 2574 } 2575 2576 while (sz > 0) { 2577 tlv = (ipfw_obj_tlv *)base; 2578 if (tlv->type != ttype) 2579 break; 2580 2581 fptr(co, fo, farg, tlv + 1); 2582 sz -= tlv->length; 2583 base += tlv->length; 2584 } 2585 } 2586 2587 return (sz); 2588 } 2589 2590 static void 2591 prepare_format_opts(struct cmdline_opts *co, struct format_opts *fo, 2592 ipfw_obj_tlv *rtlv, int rcnt, caddr_t dynbase, size_t dynsz) 2593 { 2594 int bcwidth, pcwidth, width; 2595 int n; 2596 struct ip_fw_bcounter *cntr; 2597 struct ip_fw_rule *r; 2598 2599 bcwidth = 0; 2600 pcwidth = 0; 2601 if (fo->show_counters != 0) { 2602 for (n = 0; n < rcnt; n++, 2603 rtlv = (ipfw_obj_tlv *)((caddr_t)rtlv + rtlv->length)) { 2604 cntr = (struct ip_fw_bcounter *)(rtlv + 1); 2605 r = (struct ip_fw_rule *)((caddr_t)cntr + cntr->size); 2606 /* skip rules from another set */ 2607 if (co->use_set && r->set != co->use_set - 1) 2608 continue; 2609 2610 /* packet counter */ 2611 width = pr_u64(NULL, &cntr->pcnt, 0); 2612 if (width > pcwidth) 2613 pcwidth = width; 2614 2615 /* byte counter */ 2616 width = pr_u64(NULL, &cntr->bcnt, 0); 2617 if (width > bcwidth) 2618 bcwidth = width; 2619 } 2620 } 2621 fo->bcwidth = bcwidth; 2622 fo->pcwidth = pcwidth; 2623 2624 fo->dcnt = 0; 2625 if (co->do_dynamic && dynsz > 0) 2626 foreach_state(co, fo, dynbase, dynsz, prepare_format_dyn, NULL); 2627 } 2628 2629 static int 2630 list_static_range(struct cmdline_opts *co, struct format_opts *fo, 2631 struct buf_pr *bp, ipfw_obj_tlv *rtlv, int rcnt) 2632 { 2633 int n, seen; 2634 struct ip_fw_rule *r; 2635 struct ip_fw_bcounter *cntr; 2636 int c = 0; 2637 2638 for (n = seen = 0; n < rcnt; n++, 2639 rtlv = (ipfw_obj_tlv *)((caddr_t)rtlv + rtlv->length)) { 2640 2641 if ((fo->show_counters | fo->show_time) != 0) { 2642 cntr = (struct ip_fw_bcounter *)(rtlv + 1); 2643 r = (struct ip_fw_rule *)((caddr_t)cntr + cntr->size); 2644 } else { 2645 cntr = NULL; 2646 r = (struct ip_fw_rule *)(rtlv + 1); 2647 } 2648 if (r->rulenum > fo->last) 2649 break; 2650 if (co->use_set && r->set != co->use_set - 1) 2651 continue; 2652 if (r->rulenum >= fo->first && r->rulenum <= fo->last) { 2653 show_static_rule(co, fo, bp, r, cntr); 2654 printf("%s", bp->buf); 2655 c += rtlv->length; 2656 bp_flush(bp); 2657 seen++; 2658 } 2659 } 2660 2661 return (seen); 2662 } 2663 2664 static void 2665 list_dyn_state(struct cmdline_opts *co, struct format_opts *fo, 2666 void *_arg, void *_state) 2667 { 2668 uint16_t rulenum; 2669 uint8_t set; 2670 ipfw_dyn_rule *d; 2671 struct buf_pr *bp; 2672 2673 d = (ipfw_dyn_rule *)_state; 2674 bp = (struct buf_pr *)_arg; 2675 2676 bcopy(&d->rule, &rulenum, sizeof(rulenum)); 2677 if (rulenum > fo->last) 2678 return; 2679 if (co->use_set) { 2680 bcopy((char *)&d->rule + sizeof(uint16_t), 2681 &set, sizeof(uint8_t)); 2682 if (set != co->use_set - 1) 2683 return; 2684 } 2685 if (rulenum >= fo->first) { 2686 show_dyn_state(co, fo, bp, d); 2687 printf("%s\n", bp->buf); 2688 bp_flush(bp); 2689 } 2690 } 2691 2692 static int 2693 list_dyn_range(struct cmdline_opts *co, struct format_opts *fo, 2694 struct buf_pr *bp, caddr_t base, size_t sz) 2695 { 2696 2697 sz = foreach_state(co, fo, base, sz, list_dyn_state, bp); 2698 return (sz); 2699 } 2700 2701 void 2702 ipfw_list(int ac, char *av[], int show_counters) 2703 { 2704 ipfw_cfg_lheader *cfg; 2705 struct format_opts sfo; 2706 size_t sz; 2707 int error; 2708 int lac; 2709 char **lav; 2710 uint32_t rnum; 2711 char *endptr; 2712 2713 if (g_co.test_only) { 2714 fprintf(stderr, "Testing only, list disabled\n"); 2715 return; 2716 } 2717 if (g_co.do_pipe) { 2718 dummynet_list(ac, av, show_counters); 2719 return; 2720 } 2721 2722 ac--; 2723 av++; 2724 memset(&sfo, 0, sizeof(sfo)); 2725 2726 /* Determine rule range to request */ 2727 if (ac > 0) { 2728 for (lac = ac, lav = av; lac != 0; lac--) { 2729 rnum = strtoul(*lav++, &endptr, 10); 2730 if (sfo.first == 0 || rnum < sfo.first) 2731 sfo.first = rnum; 2732 2733 if (*endptr == '-') 2734 rnum = strtoul(endptr + 1, &endptr, 10); 2735 if (sfo.last == 0 || rnum > sfo.last) 2736 sfo.last = rnum; 2737 } 2738 } 2739 2740 /* get configuraion from kernel */ 2741 cfg = NULL; 2742 sfo.show_counters = show_counters; 2743 sfo.show_time = g_co.do_time; 2744 if (g_co.do_dynamic != 2) 2745 sfo.flags |= IPFW_CFG_GET_STATIC; 2746 if (g_co.do_dynamic != 0) 2747 sfo.flags |= IPFW_CFG_GET_STATES; 2748 if ((sfo.show_counters | sfo.show_time) != 0) 2749 sfo.flags |= IPFW_CFG_GET_COUNTERS; 2750 if (ipfw_get_config(&g_co, &sfo, &cfg, &sz) != 0) 2751 err(EX_OSERR, "retrieving config failed"); 2752 2753 error = ipfw_show_config(&g_co, &sfo, cfg, sz, ac, av); 2754 2755 free(cfg); 2756 2757 if (error != EX_OK) 2758 exit(error); 2759 } 2760 2761 static int 2762 ipfw_show_config(struct cmdline_opts *co, struct format_opts *fo, 2763 ipfw_cfg_lheader *cfg, size_t sz, int ac, char *av[]) 2764 { 2765 caddr_t dynbase; 2766 size_t dynsz; 2767 int rcnt; 2768 int exitval = EX_OK; 2769 int lac; 2770 char **lav; 2771 char *endptr; 2772 size_t readsz; 2773 struct buf_pr bp; 2774 ipfw_obj_ctlv *ctlv, *tstate; 2775 ipfw_obj_tlv *rbase; 2776 2777 /* 2778 * Handle tablenames TLV first, if any 2779 */ 2780 tstate = NULL; 2781 rbase = NULL; 2782 dynbase = NULL; 2783 dynsz = 0; 2784 readsz = sizeof(*cfg); 2785 rcnt = 0; 2786 2787 fo->set_mask = cfg->set_mask; 2788 2789 ctlv = (ipfw_obj_ctlv *)(cfg + 1); 2790 if (ctlv->head.type == IPFW_TLV_TBLNAME_LIST) { 2791 object_sort_ctlv(ctlv); 2792 fo->tstate = ctlv; 2793 readsz += ctlv->head.length; 2794 ctlv = (ipfw_obj_ctlv *)((caddr_t)ctlv + ctlv->head.length); 2795 } 2796 2797 if (cfg->flags & IPFW_CFG_GET_STATIC) { 2798 /* We've requested static rules */ 2799 if (ctlv->head.type == IPFW_TLV_RULE_LIST) { 2800 rbase = (ipfw_obj_tlv *)(ctlv + 1); 2801 rcnt = ctlv->count; 2802 readsz += ctlv->head.length; 2803 ctlv = (ipfw_obj_ctlv *)((caddr_t)ctlv + 2804 ctlv->head.length); 2805 } 2806 } 2807 2808 if ((cfg->flags & IPFW_CFG_GET_STATES) && (readsz != sz)) { 2809 /* We may have some dynamic states */ 2810 dynsz = sz - readsz; 2811 /* Skip empty header */ 2812 if (dynsz != sizeof(ipfw_obj_ctlv)) 2813 dynbase = (caddr_t)ctlv; 2814 else 2815 dynsz = 0; 2816 } 2817 2818 prepare_format_opts(co, fo, rbase, rcnt, dynbase, dynsz); 2819 bp_alloc(&bp, 4096); 2820 2821 /* if no rule numbers were specified, list all rules */ 2822 if (ac == 0) { 2823 fo->first = 0; 2824 fo->last = IPFW_DEFAULT_RULE; 2825 if (cfg->flags & IPFW_CFG_GET_STATIC) 2826 list_static_range(co, fo, &bp, rbase, rcnt); 2827 2828 if (co->do_dynamic && dynsz > 0) { 2829 printf("## Dynamic rules (%d %zu):\n", fo->dcnt, 2830 dynsz); 2831 list_dyn_range(co, fo, &bp, dynbase, dynsz); 2832 } 2833 2834 bp_free(&bp); 2835 return (EX_OK); 2836 } 2837 2838 /* display specific rules requested on command line */ 2839 for (lac = ac, lav = av; lac != 0; lac--) { 2840 /* convert command line rule # */ 2841 fo->last = fo->first = strtoul(*lav++, &endptr, 10); 2842 if (*endptr == '-') 2843 fo->last = strtoul(endptr + 1, &endptr, 10); 2844 if (*endptr) { 2845 exitval = EX_USAGE; 2846 warnx("invalid rule number: %s", *(lav - 1)); 2847 continue; 2848 } 2849 2850 if ((cfg->flags & IPFW_CFG_GET_STATIC) == 0) 2851 continue; 2852 2853 if (list_static_range(co, fo, &bp, rbase, rcnt) == 0) { 2854 /* give precedence to other error(s) */ 2855 if (exitval == EX_OK) 2856 exitval = EX_UNAVAILABLE; 2857 if (fo->first == fo->last) 2858 warnx("rule %u does not exist", fo->first); 2859 else 2860 warnx("no rules in range %u-%u", 2861 fo->first, fo->last); 2862 } 2863 } 2864 2865 if (co->do_dynamic && dynsz > 0) { 2866 printf("## Dynamic rules:\n"); 2867 for (lac = ac, lav = av; lac != 0; lac--) { 2868 fo->last = fo->first = strtoul(*lav++, &endptr, 10); 2869 if (*endptr == '-') 2870 fo->last = strtoul(endptr+1, &endptr, 10); 2871 if (*endptr) 2872 /* already warned */ 2873 continue; 2874 list_dyn_range(co, fo, &bp, dynbase, dynsz); 2875 } 2876 } 2877 2878 bp_free(&bp); 2879 return (exitval); 2880 } 2881 2882 2883 /* 2884 * Retrieves current ipfw configuration of given type 2885 * and stores its pointer to @pcfg. 2886 * 2887 * Caller is responsible for freeing @pcfg. 2888 * 2889 * Returns 0 on success. 2890 */ 2891 2892 static int 2893 ipfw_get_config(struct cmdline_opts *co, struct format_opts *fo, 2894 ipfw_cfg_lheader **pcfg, size_t *psize) 2895 { 2896 ipfw_cfg_lheader *cfg; 2897 size_t sz; 2898 int i; 2899 2900 2901 if (co->test_only != 0) { 2902 fprintf(stderr, "Testing only, list disabled\n"); 2903 return (0); 2904 } 2905 2906 /* Start with some data size */ 2907 sz = 4096; 2908 cfg = NULL; 2909 2910 for (i = 0; i < 16; i++) { 2911 if (cfg != NULL) 2912 free(cfg); 2913 if ((cfg = calloc(1, sz)) == NULL) 2914 return (ENOMEM); 2915 2916 cfg->flags = fo->flags; 2917 cfg->start_rule = fo->first; 2918 cfg->end_rule = fo->last; 2919 2920 if (do_get3(IP_FW_XGET, &cfg->opheader, &sz) != 0) { 2921 if (errno != ENOMEM) { 2922 free(cfg); 2923 return (errno); 2924 } 2925 2926 /* Buffer size is not enough. Try to increase */ 2927 sz = sz * 2; 2928 if (sz < cfg->size) 2929 sz = cfg->size; 2930 continue; 2931 } 2932 2933 *pcfg = cfg; 2934 *psize = sz; 2935 return (0); 2936 } 2937 2938 free(cfg); 2939 return (ENOMEM); 2940 } 2941 2942 static int 2943 lookup_host (char *host, struct in_addr *ipaddr) 2944 { 2945 struct hostent *he; 2946 2947 if (!inet_aton(host, ipaddr)) { 2948 if ((he = gethostbyname(host)) == NULL) 2949 return(-1); 2950 *ipaddr = *(struct in_addr *)he->h_addr_list[0]; 2951 } 2952 return(0); 2953 } 2954 2955 struct tidx { 2956 ipfw_obj_ntlv *idx; 2957 uint32_t count; 2958 uint32_t size; 2959 uint16_t counter; 2960 uint8_t set; 2961 }; 2962 2963 int 2964 ipfw_check_object_name(const char *name) 2965 { 2966 int c, i, l; 2967 2968 /* 2969 * Check that name is null-terminated and contains 2970 * valid symbols only. Valid mask is: 2971 * [a-zA-Z0-9\-_\.]{1,63} 2972 */ 2973 l = strlen(name); 2974 if (l == 0 || l >= 64) 2975 return (EINVAL); 2976 for (i = 0; i < l; i++) { 2977 c = name[i]; 2978 if (isalpha(c) || isdigit(c) || c == '_' || 2979 c == '-' || c == '.') 2980 continue; 2981 return (EINVAL); 2982 } 2983 return (0); 2984 } 2985 2986 static const char *default_state_name = "default"; 2987 2988 static int 2989 state_check_name(const char *name) 2990 { 2991 2992 if (ipfw_check_object_name(name) != 0) 2993 return (EINVAL); 2994 if (strcmp(name, "any") == 0) 2995 return (EINVAL); 2996 return (0); 2997 } 2998 2999 static int 3000 eaction_check_name(const char *name) 3001 { 3002 3003 if (ipfw_check_object_name(name) != 0) 3004 return (EINVAL); 3005 /* Restrict some 'special' names */ 3006 if (match_token(rule_actions, name) != -1 && 3007 match_token(rule_action_params, name) != -1) 3008 return (EINVAL); 3009 return (0); 3010 } 3011 3012 static uint16_t 3013 pack_object(struct tidx *tstate, const char *name, int otype) 3014 { 3015 ipfw_obj_ntlv *ntlv; 3016 uint32_t i; 3017 3018 for (i = 0; i < tstate->count; i++) { 3019 if (strcmp(tstate->idx[i].name, name) != 0) 3020 continue; 3021 if (tstate->idx[i].set != tstate->set) 3022 continue; 3023 if (tstate->idx[i].head.type != otype) 3024 continue; 3025 3026 return (tstate->idx[i].idx); 3027 } 3028 3029 if (tstate->count + 1 > tstate->size) { 3030 tstate->size += 4; 3031 tstate->idx = realloc(tstate->idx, tstate->size * 3032 sizeof(ipfw_obj_ntlv)); 3033 if (tstate->idx == NULL) 3034 return (0); 3035 } 3036 3037 ntlv = &tstate->idx[i]; 3038 memset(ntlv, 0, sizeof(ipfw_obj_ntlv)); 3039 strlcpy(ntlv->name, name, sizeof(ntlv->name)); 3040 ntlv->head.type = otype; 3041 ntlv->head.length = sizeof(ipfw_obj_ntlv); 3042 ntlv->set = tstate->set; 3043 ntlv->idx = ++tstate->counter; 3044 tstate->count++; 3045 3046 return (ntlv->idx); 3047 } 3048 3049 static uint16_t 3050 pack_table(struct tidx *tstate, const char *name) 3051 { 3052 3053 if (table_check_name(name) != 0) 3054 return (0); 3055 3056 return (pack_object(tstate, name, IPFW_TLV_TBL_NAME)); 3057 } 3058 3059 void 3060 fill_table(struct _ipfw_insn *cmd, char *av, uint8_t opcode, 3061 struct tidx *tstate) 3062 { 3063 uint32_t *d = ((ipfw_insn_u32 *)cmd)->d; 3064 uint16_t uidx; 3065 char *p; 3066 3067 if ((p = strchr(av + 6, ')')) == NULL) 3068 errx(EX_DATAERR, "forgotten parenthesis: '%s'", av); 3069 *p = '\0'; 3070 p = strchr(av + 6, ','); 3071 if (p) 3072 *p++ = '\0'; 3073 3074 if ((uidx = pack_table(tstate, av + 6)) == 0) 3075 errx(EX_DATAERR, "Invalid table name: %s", av + 6); 3076 3077 cmd->opcode = opcode; 3078 cmd->arg1 = uidx; 3079 if (p) { 3080 cmd->len |= F_INSN_SIZE(ipfw_insn_u32); 3081 d[0] = strtoul(p, NULL, 0); 3082 } else 3083 cmd->len |= F_INSN_SIZE(ipfw_insn); 3084 } 3085 3086 3087 /* 3088 * fills the addr and mask fields in the instruction as appropriate from av. 3089 * Update length as appropriate. 3090 * The following formats are allowed: 3091 * me returns O_IP_*_ME 3092 * 1.2.3.4 single IP address 3093 * 1.2.3.4:5.6.7.8 address:mask 3094 * 1.2.3.4/24 address/mask 3095 * 1.2.3.4/26{1,6,5,4,23} set of addresses in a subnet 3096 * We can have multiple comma-separated address/mask entries. 3097 */ 3098 static void 3099 fill_ip(ipfw_insn_ip *cmd, char *av, int cblen, struct tidx *tstate) 3100 { 3101 int len = 0; 3102 uint32_t *d = ((ipfw_insn_u32 *)cmd)->d; 3103 3104 cmd->o.len &= ~F_LEN_MASK; /* zero len */ 3105 3106 if (_substrcmp(av, "any") == 0) 3107 return; 3108 3109 if (_substrcmp(av, "me") == 0) { 3110 cmd->o.len |= F_INSN_SIZE(ipfw_insn); 3111 return; 3112 } 3113 3114 if (strncmp(av, "table(", 6) == 0) { 3115 fill_table(&cmd->o, av, O_IP_DST_LOOKUP, tstate); 3116 return; 3117 } 3118 3119 while (av) { 3120 /* 3121 * After the address we can have '/' or ':' indicating a mask, 3122 * ',' indicating another address follows, '{' indicating a 3123 * set of addresses of unspecified size. 3124 */ 3125 char *t = NULL, *p = strpbrk(av, "/:,{"); 3126 int masklen; 3127 char md, nd = '\0'; 3128 3129 CHECK_LENGTH(cblen, (int)F_INSN_SIZE(ipfw_insn) + 2 + len); 3130 3131 if (p) { 3132 md = *p; 3133 *p++ = '\0'; 3134 if ((t = strpbrk(p, ",{")) != NULL) { 3135 nd = *t; 3136 *t = '\0'; 3137 } 3138 } else 3139 md = '\0'; 3140 3141 if (lookup_host(av, (struct in_addr *)&d[0]) != 0) 3142 errx(EX_NOHOST, "hostname ``%s'' unknown", av); 3143 switch (md) { 3144 case ':': 3145 if (!inet_aton(p, (struct in_addr *)&d[1])) 3146 errx(EX_DATAERR, "bad netmask ``%s''", p); 3147 break; 3148 case '/': 3149 masklen = atoi(p); 3150 if (masklen == 0) 3151 d[1] = htonl(0U); /* mask */ 3152 else if (masklen > 32) 3153 errx(EX_DATAERR, "bad width ``%s''", p); 3154 else 3155 d[1] = htonl(~0U << (32 - masklen)); 3156 break; 3157 case '{': /* no mask, assume /24 and put back the '{' */ 3158 d[1] = htonl(~0U << (32 - 24)); 3159 *(--p) = md; 3160 break; 3161 3162 case ',': /* single address plus continuation */ 3163 *(--p) = md; 3164 /* FALLTHROUGH */ 3165 case 0: /* initialization value */ 3166 default: 3167 d[1] = htonl(~0U); /* force /32 */ 3168 break; 3169 } 3170 d[0] &= d[1]; /* mask base address with mask */ 3171 if (t) 3172 *t = nd; 3173 /* find next separator */ 3174 if (p) 3175 p = strpbrk(p, ",{"); 3176 if (p && *p == '{') { 3177 /* 3178 * We have a set of addresses. They are stored as follows: 3179 * arg1 is the set size (powers of 2, 2..256) 3180 * addr is the base address IN HOST FORMAT 3181 * mask.. is an array of arg1 bits (rounded up to 3182 * the next multiple of 32) with bits set 3183 * for each host in the map. 3184 */ 3185 uint32_t *map = (uint32_t *)&cmd->mask; 3186 int low, high; 3187 int i = contigmask((uint8_t *)&(d[1]), 32); 3188 3189 if (len > 0) 3190 errx(EX_DATAERR, "address set cannot be in a list"); 3191 if (i < 24 || i > 31) 3192 errx(EX_DATAERR, "invalid set with mask %d\n", i); 3193 cmd->o.arg1 = 1<<(32-i); /* map length */ 3194 d[0] = ntohl(d[0]); /* base addr in host format */ 3195 cmd->o.opcode = O_IP_DST_SET; /* default */ 3196 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32) + (cmd->o.arg1+31)/32; 3197 for (i = 0; i < (cmd->o.arg1+31)/32 ; i++) 3198 map[i] = 0; /* clear map */ 3199 3200 av = p + 1; 3201 low = d[0] & 0xff; 3202 high = low + cmd->o.arg1 - 1; 3203 /* 3204 * Here, i stores the previous value when we specify a range 3205 * of addresses within a mask, e.g. 45-63. i = -1 means we 3206 * have no previous value. 3207 */ 3208 i = -1; /* previous value in a range */ 3209 while (isdigit(*av)) { 3210 char *s; 3211 int a = strtol(av, &s, 0); 3212 3213 if (s == av) { /* no parameter */ 3214 if (*av != '}') 3215 errx(EX_DATAERR, "set not closed\n"); 3216 if (i != -1) 3217 errx(EX_DATAERR, "incomplete range %d-", i); 3218 break; 3219 } 3220 if (a < low || a > high) 3221 errx(EX_DATAERR, "addr %d out of range [%d-%d]\n", 3222 a, low, high); 3223 a -= low; 3224 if (i == -1) /* no previous in range */ 3225 i = a; 3226 else { /* check that range is valid */ 3227 if (i > a) 3228 errx(EX_DATAERR, "invalid range %d-%d", 3229 i+low, a+low); 3230 if (*s == '-') 3231 errx(EX_DATAERR, "double '-' in range"); 3232 } 3233 for (; i <= a; i++) 3234 map[i/32] |= 1<<(i & 31); 3235 i = -1; 3236 if (*s == '-') 3237 i = a; 3238 else if (*s == '}') 3239 break; 3240 av = s+1; 3241 } 3242 return; 3243 } 3244 av = p; 3245 if (av) /* then *av must be a ',' */ 3246 av++; 3247 3248 /* Check this entry */ 3249 if (d[1] == 0) { /* "any", specified as x.x.x.x/0 */ 3250 /* 3251 * 'any' turns the entire list into a NOP. 3252 * 'not any' never matches, so it is removed from the 3253 * list unless it is the only item, in which case we 3254 * report an error. 3255 */ 3256 if (cmd->o.len & F_NOT) { /* "not any" never matches */ 3257 if (av == NULL && len == 0) /* only this entry */ 3258 errx(EX_DATAERR, "not any never matches"); 3259 } 3260 /* else do nothing and skip this entry */ 3261 return; 3262 } 3263 /* A single IP can be stored in an optimized format */ 3264 if (d[1] == (uint32_t)~0 && av == NULL && len == 0) { 3265 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32); 3266 return; 3267 } 3268 len += 2; /* two words... */ 3269 d += 2; 3270 } /* end while */ 3271 if (len + 1 > F_LEN_MASK) 3272 errx(EX_DATAERR, "address list too long"); 3273 cmd->o.len |= len+1; 3274 } 3275 3276 3277 /* n2mask sets n bits of the mask */ 3278 void 3279 n2mask(struct in6_addr *mask, int n) 3280 { 3281 static int minimask[9] = 3282 { 0x00, 0x80, 0xc0, 0xe0, 0xf0, 0xf8, 0xfc, 0xfe, 0xff }; 3283 u_char *p; 3284 3285 memset(mask, 0, sizeof(struct in6_addr)); 3286 p = (u_char *) mask; 3287 for (; n > 0; p++, n -= 8) { 3288 if (n >= 8) 3289 *p = 0xff; 3290 else 3291 *p = minimask[n]; 3292 } 3293 return; 3294 } 3295 3296 static void 3297 fill_flags_cmd(ipfw_insn *cmd, enum ipfw_opcodes opcode, 3298 struct _s_x *flags, char *p) 3299 { 3300 char *e; 3301 uint32_t set = 0, clear = 0; 3302 3303 if (fill_flags(flags, p, &e, &set, &clear) != 0) 3304 errx(EX_DATAERR, "invalid flag %s", e); 3305 3306 cmd->opcode = opcode; 3307 cmd->len = (cmd->len & (F_NOT | F_OR)) | 1; 3308 cmd->arg1 = (set & 0xff) | ( (clear & 0xff) << 8); 3309 } 3310 3311 3312 void 3313 ipfw_delete(char *av[]) 3314 { 3315 ipfw_range_tlv rt; 3316 char *sep; 3317 int i, j; 3318 int exitval = EX_OK; 3319 int do_set = 0; 3320 3321 av++; 3322 NEED1("missing rule specification"); 3323 if ( *av && _substrcmp(*av, "set") == 0) { 3324 /* Do not allow using the following syntax: 3325 * ipfw set N delete set M 3326 */ 3327 if (g_co.use_set) 3328 errx(EX_DATAERR, "invalid syntax"); 3329 do_set = 1; /* delete set */ 3330 av++; 3331 } 3332 3333 /* Rule number */ 3334 while (*av && isdigit(**av)) { 3335 i = strtol(*av, &sep, 10); 3336 j = i; 3337 if (*sep== '-') 3338 j = strtol(sep + 1, NULL, 10); 3339 av++; 3340 if (g_co.do_nat) { 3341 exitval = ipfw_delete_nat(i); 3342 } else if (g_co.do_pipe) { 3343 exitval = ipfw_delete_pipe(g_co.do_pipe, i); 3344 } else { 3345 memset(&rt, 0, sizeof(rt)); 3346 if (do_set != 0) { 3347 rt.set = i & 31; 3348 rt.flags = IPFW_RCFLAG_SET; 3349 } else { 3350 rt.start_rule = i & 0xffff; 3351 rt.end_rule = j & 0xffff; 3352 if (rt.start_rule == 0 && rt.end_rule == 0) 3353 rt.flags |= IPFW_RCFLAG_ALL; 3354 else 3355 rt.flags |= IPFW_RCFLAG_RANGE; 3356 if (g_co.use_set != 0) { 3357 rt.set = g_co.use_set - 1; 3358 rt.flags |= IPFW_RCFLAG_SET; 3359 } 3360 } 3361 if (g_co.do_dynamic == 2) 3362 rt.flags |= IPFW_RCFLAG_DYNAMIC; 3363 i = do_range_cmd(IP_FW_XDEL, &rt); 3364 if (i != 0) { 3365 exitval = EX_UNAVAILABLE; 3366 if (g_co.do_quiet) 3367 continue; 3368 warn("rule %u: setsockopt(IP_FW_XDEL)", 3369 rt.start_rule); 3370 } else if (rt.new_set == 0 && do_set == 0 && 3371 g_co.do_dynamic != 2) { 3372 exitval = EX_UNAVAILABLE; 3373 if (g_co.do_quiet) 3374 continue; 3375 if (rt.start_rule != rt.end_rule) 3376 warnx("no rules rules in %u-%u range", 3377 rt.start_rule, rt.end_rule); 3378 else 3379 warnx("rule %u not found", 3380 rt.start_rule); 3381 } 3382 } 3383 } 3384 if (exitval != EX_OK && g_co.do_force == 0) 3385 exit(exitval); 3386 } 3387 3388 3389 /* 3390 * fill the interface structure. We do not check the name as we can 3391 * create interfaces dynamically, so checking them at insert time 3392 * makes relatively little sense. 3393 * Interface names containing '*', '?', or '[' are assumed to be shell 3394 * patterns which match interfaces. 3395 */ 3396 static void 3397 fill_iface(ipfw_insn_if *cmd, char *arg, int cblen, struct tidx *tstate) 3398 { 3399 char *p; 3400 uint16_t uidx; 3401 3402 cmd->name[0] = '\0'; 3403 cmd->o.len |= F_INSN_SIZE(ipfw_insn_if); 3404 3405 CHECK_CMDLEN; 3406 3407 /* Parse the interface or address */ 3408 if (strcmp(arg, "any") == 0) 3409 cmd->o.len = 0; /* effectively ignore this command */ 3410 else if (strncmp(arg, "table(", 6) == 0) { 3411 if ((p = strchr(arg + 6, ')')) == NULL) 3412 errx(EX_DATAERR, "forgotten parenthesis: '%s'", arg); 3413 *p = '\0'; 3414 p = strchr(arg + 6, ','); 3415 if (p) 3416 *p++ = '\0'; 3417 if ((uidx = pack_table(tstate, arg + 6)) == 0) 3418 errx(EX_DATAERR, "Invalid table name: %s", arg + 6); 3419 3420 cmd->name[0] = '\1'; /* Special value indicating table */ 3421 cmd->p.kidx = uidx; 3422 } else if (!isdigit(*arg)) { 3423 strlcpy(cmd->name, arg, sizeof(cmd->name)); 3424 cmd->p.glob = strpbrk(arg, "*?[") != NULL ? 1 : 0; 3425 } else if (!inet_aton(arg, &cmd->p.ip)) 3426 errx(EX_DATAERR, "bad ip address ``%s''", arg); 3427 } 3428 3429 static void 3430 get_mac_addr_mask(const char *p, uint8_t *addr, uint8_t *mask) 3431 { 3432 int i; 3433 size_t l; 3434 char *ap, *ptr, *optr; 3435 struct ether_addr *mac; 3436 const char *macset = "0123456789abcdefABCDEF:"; 3437 3438 if (strcmp(p, "any") == 0) { 3439 for (i = 0; i < ETHER_ADDR_LEN; i++) 3440 addr[i] = mask[i] = 0; 3441 return; 3442 } 3443 3444 optr = ptr = strdup(p); 3445 if ((ap = strsep(&ptr, "&/")) != NULL && *ap != 0) { 3446 l = strlen(ap); 3447 if (strspn(ap, macset) != l || (mac = ether_aton(ap)) == NULL) 3448 errx(EX_DATAERR, "Incorrect MAC address"); 3449 bcopy(mac, addr, ETHER_ADDR_LEN); 3450 } else 3451 errx(EX_DATAERR, "Incorrect MAC address"); 3452 3453 if (ptr != NULL) { /* we have mask? */ 3454 if (p[ptr - optr - 1] == '/') { /* mask len */ 3455 long ml = strtol(ptr, &ap, 10); 3456 if (*ap != 0 || ml > ETHER_ADDR_LEN * 8 || ml < 0) 3457 errx(EX_DATAERR, "Incorrect mask length"); 3458 for (i = 0; ml > 0 && i < ETHER_ADDR_LEN; ml -= 8, i++) 3459 mask[i] = (ml >= 8) ? 0xff: (~0) << (8 - ml); 3460 } else { /* mask */ 3461 l = strlen(ptr); 3462 if (strspn(ptr, macset) != l || 3463 (mac = ether_aton(ptr)) == NULL) 3464 errx(EX_DATAERR, "Incorrect mask"); 3465 bcopy(mac, mask, ETHER_ADDR_LEN); 3466 } 3467 } else { /* default mask: ff:ff:ff:ff:ff:ff */ 3468 for (i = 0; i < ETHER_ADDR_LEN; i++) 3469 mask[i] = 0xff; 3470 } 3471 for (i = 0; i < ETHER_ADDR_LEN; i++) 3472 addr[i] &= mask[i]; 3473 3474 free(optr); 3475 } 3476 3477 /* 3478 * helper function, updates the pointer to cmd with the length 3479 * of the current command, and also cleans up the first word of 3480 * the new command in case it has been clobbered before. 3481 */ 3482 static ipfw_insn * 3483 next_cmd(ipfw_insn *cmd, int *len) 3484 { 3485 *len -= F_LEN(cmd); 3486 CHECK_LENGTH(*len, 0); 3487 cmd += F_LEN(cmd); 3488 bzero(cmd, sizeof(*cmd)); 3489 return cmd; 3490 } 3491 3492 /* 3493 * Takes arguments and copies them into a comment 3494 */ 3495 static void 3496 fill_comment(ipfw_insn *cmd, char **av, int cblen) 3497 { 3498 int i, l; 3499 char *p = (char *)(cmd + 1); 3500 3501 cmd->opcode = O_NOP; 3502 cmd->len = (cmd->len & (F_NOT | F_OR)); 3503 3504 /* Compute length of comment string. */ 3505 for (i = 0, l = 0; av[i] != NULL; i++) 3506 l += strlen(av[i]) + 1; 3507 if (l == 0) 3508 return; 3509 if (l > 84) 3510 errx(EX_DATAERR, 3511 "comment too long (max 80 chars)"); 3512 l = 1 + (l+3)/4; 3513 cmd->len = (cmd->len & (F_NOT | F_OR)) | l; 3514 CHECK_CMDLEN; 3515 3516 for (i = 0; av[i] != NULL; i++) { 3517 strcpy(p, av[i]); 3518 p += strlen(av[i]); 3519 *p++ = ' '; 3520 } 3521 *(--p) = '\0'; 3522 } 3523 3524 /* 3525 * A function to fill simple commands of size 1. 3526 * Existing flags are preserved. 3527 */ 3528 static void 3529 fill_cmd(ipfw_insn *cmd, enum ipfw_opcodes opcode, int flags, uint16_t arg) 3530 { 3531 cmd->opcode = opcode; 3532 cmd->len = ((cmd->len | flags) & (F_NOT | F_OR)) | 1; 3533 cmd->arg1 = arg; 3534 } 3535 3536 /* 3537 * Fetch and add the MAC address and type, with masks. This generates one or 3538 * two microinstructions, and returns the pointer to the last one. 3539 */ 3540 static ipfw_insn * 3541 add_mac(ipfw_insn *cmd, char *av[], int cblen) 3542 { 3543 ipfw_insn_mac *mac; 3544 3545 if ( ( av[0] == NULL ) || ( av[1] == NULL ) ) 3546 errx(EX_DATAERR, "MAC dst src"); 3547 3548 cmd->opcode = O_MACADDR2; 3549 cmd->len = (cmd->len & (F_NOT | F_OR)) | F_INSN_SIZE(ipfw_insn_mac); 3550 CHECK_CMDLEN; 3551 3552 mac = (ipfw_insn_mac *)cmd; 3553 get_mac_addr_mask(av[0], mac->addr, mac->mask); /* dst */ 3554 get_mac_addr_mask(av[1], &(mac->addr[ETHER_ADDR_LEN]), 3555 &(mac->mask[ETHER_ADDR_LEN])); /* src */ 3556 return cmd; 3557 } 3558 3559 static ipfw_insn * 3560 add_mactype(ipfw_insn *cmd, char *av, int cblen) 3561 { 3562 if (!av) 3563 errx(EX_DATAERR, "missing MAC type"); 3564 if (strcmp(av, "any") != 0) { /* we have a non-null type */ 3565 fill_newports((ipfw_insn_u16 *)cmd, av, IPPROTO_ETHERTYPE, 3566 cblen); 3567 cmd->opcode = O_MAC_TYPE; 3568 return cmd; 3569 } else 3570 return NULL; 3571 } 3572 3573 static ipfw_insn * 3574 add_proto0(ipfw_insn *cmd, char *av, u_char *protop) 3575 { 3576 struct protoent *pe; 3577 char *ep; 3578 int proto; 3579 3580 proto = strtol(av, &ep, 10); 3581 if (*ep != '\0' || proto <= 0) { 3582 if ((pe = getprotobyname(av)) == NULL) 3583 return NULL; 3584 proto = pe->p_proto; 3585 } 3586 3587 fill_cmd(cmd, O_PROTO, 0, proto); 3588 *protop = proto; 3589 return cmd; 3590 } 3591 3592 static ipfw_insn * 3593 add_proto(ipfw_insn *cmd, char *av, u_char *protop) 3594 { 3595 u_char proto = IPPROTO_IP; 3596 3597 if (_substrcmp(av, "all") == 0 || strcmp(av, "ip") == 0) 3598 ; /* do not set O_IP4 nor O_IP6 */ 3599 else if (strcmp(av, "ip4") == 0) 3600 /* explicit "just IPv4" rule */ 3601 fill_cmd(cmd, O_IP4, 0, 0); 3602 else if (strcmp(av, "ip6") == 0) { 3603 /* explicit "just IPv6" rule */ 3604 proto = IPPROTO_IPV6; 3605 fill_cmd(cmd, O_IP6, 0, 0); 3606 } else 3607 return add_proto0(cmd, av, protop); 3608 3609 *protop = proto; 3610 return cmd; 3611 } 3612 3613 static ipfw_insn * 3614 add_proto_compat(ipfw_insn *cmd, char *av, u_char *protop) 3615 { 3616 u_char proto = IPPROTO_IP; 3617 3618 if (_substrcmp(av, "all") == 0 || strcmp(av, "ip") == 0) 3619 ; /* do not set O_IP4 nor O_IP6 */ 3620 else if (strcmp(av, "ipv4") == 0 || strcmp(av, "ip4") == 0) 3621 /* explicit "just IPv4" rule */ 3622 fill_cmd(cmd, O_IP4, 0, 0); 3623 else if (strcmp(av, "ipv6") == 0 || strcmp(av, "ip6") == 0) { 3624 /* explicit "just IPv6" rule */ 3625 proto = IPPROTO_IPV6; 3626 fill_cmd(cmd, O_IP6, 0, 0); 3627 } else 3628 return add_proto0(cmd, av, protop); 3629 3630 *protop = proto; 3631 return cmd; 3632 } 3633 3634 static ipfw_insn * 3635 add_srcip(ipfw_insn *cmd, char *av, int cblen, struct tidx *tstate) 3636 { 3637 fill_ip((ipfw_insn_ip *)cmd, av, cblen, tstate); 3638 if (cmd->opcode == O_IP_DST_SET) /* set */ 3639 cmd->opcode = O_IP_SRC_SET; 3640 else if (cmd->opcode == O_IP_DST_LOOKUP) /* table */ 3641 cmd->opcode = O_IP_SRC_LOOKUP; 3642 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn)) /* me */ 3643 cmd->opcode = O_IP_SRC_ME; 3644 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_u32)) /* one IP */ 3645 cmd->opcode = O_IP_SRC; 3646 else /* addr/mask */ 3647 cmd->opcode = O_IP_SRC_MASK; 3648 return cmd; 3649 } 3650 3651 static ipfw_insn * 3652 add_dstip(ipfw_insn *cmd, char *av, int cblen, struct tidx *tstate) 3653 { 3654 fill_ip((ipfw_insn_ip *)cmd, av, cblen, tstate); 3655 if (cmd->opcode == O_IP_DST_SET) /* set */ 3656 ; 3657 else if (cmd->opcode == O_IP_DST_LOOKUP) /* table */ 3658 ; 3659 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn)) /* me */ 3660 cmd->opcode = O_IP_DST_ME; 3661 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_u32)) /* one IP */ 3662 cmd->opcode = O_IP_DST; 3663 else /* addr/mask */ 3664 cmd->opcode = O_IP_DST_MASK; 3665 return cmd; 3666 } 3667 3668 static struct _s_x f_reserved_keywords[] = { 3669 { "altq", TOK_OR }, 3670 { "//", TOK_OR }, 3671 { "diverted", TOK_OR }, 3672 { "dst-port", TOK_OR }, 3673 { "src-port", TOK_OR }, 3674 { "established", TOK_OR }, 3675 { "keep-state", TOK_OR }, 3676 { "frag", TOK_OR }, 3677 { "icmptypes", TOK_OR }, 3678 { "in", TOK_OR }, 3679 { "out", TOK_OR }, 3680 { "ip6", TOK_OR }, 3681 { "any", TOK_OR }, 3682 { "to", TOK_OR }, 3683 { "via", TOK_OR }, 3684 { "{", TOK_OR }, 3685 { NULL, 0 } /* terminator */ 3686 }; 3687 3688 static ipfw_insn * 3689 add_ports(ipfw_insn *cmd, char *av, u_char proto, int opcode, int cblen) 3690 { 3691 3692 if (match_token(f_reserved_keywords, av) != -1) 3693 return (NULL); 3694 3695 if (fill_newports((ipfw_insn_u16 *)cmd, av, proto, cblen)) { 3696 /* XXX todo: check that we have a protocol with ports */ 3697 cmd->opcode = opcode; 3698 return cmd; 3699 } 3700 return NULL; 3701 } 3702 3703 static ipfw_insn * 3704 add_src(ipfw_insn *cmd, char *av, u_char proto, int cblen, struct tidx *tstate) 3705 { 3706 struct in6_addr a; 3707 char *host, *ch, buf[INET6_ADDRSTRLEN]; 3708 ipfw_insn *ret = NULL; 3709 size_t len; 3710 3711 /* Copy first address in set if needed */ 3712 if ((ch = strpbrk(av, "/,")) != NULL) { 3713 len = ch - av; 3714 strlcpy(buf, av, sizeof(buf)); 3715 if (len < sizeof(buf)) 3716 buf[len] = '\0'; 3717 host = buf; 3718 } else 3719 host = av; 3720 3721 if (proto == IPPROTO_IPV6 || strcmp(av, "me6") == 0 || 3722 inet_pton(AF_INET6, host, &a) == 1) 3723 ret = add_srcip6(cmd, av, cblen, tstate); 3724 /* XXX: should check for IPv4, not !IPv6 */ 3725 if (ret == NULL && (proto == IPPROTO_IP || strcmp(av, "me") == 0 || 3726 inet_pton(AF_INET6, host, &a) != 1)) 3727 ret = add_srcip(cmd, av, cblen, tstate); 3728 if (ret == NULL && strcmp(av, "any") != 0) 3729 ret = cmd; 3730 3731 return ret; 3732 } 3733 3734 static ipfw_insn * 3735 add_dst(ipfw_insn *cmd, char *av, u_char proto, int cblen, struct tidx *tstate) 3736 { 3737 struct in6_addr a; 3738 char *host, *ch, buf[INET6_ADDRSTRLEN]; 3739 ipfw_insn *ret = NULL; 3740 size_t len; 3741 3742 /* Copy first address in set if needed */ 3743 if ((ch = strpbrk(av, "/,")) != NULL) { 3744 len = ch - av; 3745 strlcpy(buf, av, sizeof(buf)); 3746 if (len < sizeof(buf)) 3747 buf[len] = '\0'; 3748 host = buf; 3749 } else 3750 host = av; 3751 3752 if (proto == IPPROTO_IPV6 || strcmp(av, "me6") == 0 || 3753 inet_pton(AF_INET6, host, &a) == 1) 3754 ret = add_dstip6(cmd, av, cblen, tstate); 3755 /* XXX: should check for IPv4, not !IPv6 */ 3756 if (ret == NULL && (proto == IPPROTO_IP || strcmp(av, "me") == 0 || 3757 inet_pton(AF_INET6, host, &a) != 1)) 3758 ret = add_dstip(cmd, av, cblen, tstate); 3759 if (ret == NULL && strcmp(av, "any") != 0) 3760 ret = cmd; 3761 3762 return ret; 3763 } 3764 3765 /* 3766 * Parse arguments and assemble the microinstructions which make up a rule. 3767 * Rules are added into the 'rulebuf' and then copied in the correct order 3768 * into the actual rule. 3769 * 3770 * The syntax for a rule starts with the action, followed by 3771 * optional action parameters, and the various match patterns. 3772 * In the assembled microcode, the first opcode must be an O_PROBE_STATE 3773 * (generated if the rule includes a keep-state option), then the 3774 * various match patterns, log/altq actions, and the actual action. 3775 * 3776 */ 3777 static void 3778 compile_rule(char *av[], uint32_t *rbuf, int *rbufsize, struct tidx *tstate) 3779 { 3780 /* 3781 * rules are added into the 'rulebuf' and then copied in 3782 * the correct order into the actual rule. 3783 * Some things that need to go out of order (prob, action etc.) 3784 * go into actbuf[]. 3785 */ 3786 static uint32_t actbuf[255], cmdbuf[255]; 3787 int rblen, ablen, cblen; 3788 3789 ipfw_insn *src, *dst, *cmd, *action, *prev=NULL; 3790 ipfw_insn *first_cmd; /* first match pattern */ 3791 3792 struct ip_fw_rule *rule; 3793 3794 /* 3795 * various flags used to record that we entered some fields. 3796 */ 3797 ipfw_insn *have_state = NULL; /* any state-related option */ 3798 int have_rstate = 0; 3799 ipfw_insn *have_log = NULL, *have_altq = NULL, *have_tag = NULL; 3800 ipfw_insn *have_skipcmd = NULL; 3801 size_t len; 3802 3803 int i; 3804 3805 int open_par = 0; /* open parenthesis ( */ 3806 3807 /* proto is here because it is used to fetch ports */ 3808 u_char proto = IPPROTO_IP; /* default protocol */ 3809 3810 double match_prob = 1; /* match probability, default is always match */ 3811 3812 bzero(actbuf, sizeof(actbuf)); /* actions go here */ 3813 bzero(cmdbuf, sizeof(cmdbuf)); 3814 bzero(rbuf, *rbufsize); 3815 3816 rule = (struct ip_fw_rule *)rbuf; 3817 cmd = (ipfw_insn *)cmdbuf; 3818 action = (ipfw_insn *)actbuf; 3819 3820 rblen = *rbufsize / sizeof(uint32_t); 3821 rblen -= sizeof(struct ip_fw_rule) / sizeof(uint32_t); 3822 ablen = sizeof(actbuf) / sizeof(actbuf[0]); 3823 cblen = sizeof(cmdbuf) / sizeof(cmdbuf[0]); 3824 cblen -= F_INSN_SIZE(ipfw_insn_u32) + 1; 3825 3826 #define CHECK_RBUFLEN(len) { CHECK_LENGTH(rblen, len); rblen -= len; } 3827 #define CHECK_ACTLEN CHECK_LENGTH(ablen, action->len) 3828 3829 av++; 3830 3831 /* [rule N] -- Rule number optional */ 3832 if (av[0] && isdigit(**av)) { 3833 rule->rulenum = atoi(*av); 3834 av++; 3835 } 3836 3837 /* [set N] -- set number (0..RESVD_SET), optional */ 3838 if (av[0] && av[1] && _substrcmp(*av, "set") == 0) { 3839 int set = strtoul(av[1], NULL, 10); 3840 if (set < 0 || set > RESVD_SET) 3841 errx(EX_DATAERR, "illegal set %s", av[1]); 3842 rule->set = set; 3843 tstate->set = set; 3844 av += 2; 3845 } 3846 3847 /* [prob D] -- match probability, optional */ 3848 if (av[0] && av[1] && _substrcmp(*av, "prob") == 0) { 3849 match_prob = strtod(av[1], NULL); 3850 3851 if (match_prob <= 0 || match_prob > 1) 3852 errx(EX_DATAERR, "illegal match prob. %s", av[1]); 3853 av += 2; 3854 } 3855 3856 /* action -- mandatory */ 3857 NEED1("missing action"); 3858 i = match_token(rule_actions, *av); 3859 av++; 3860 action->len = 1; /* default */ 3861 CHECK_ACTLEN; 3862 switch(i) { 3863 case TOK_CHECKSTATE: 3864 have_state = action; 3865 action->opcode = O_CHECK_STATE; 3866 if (*av == NULL || 3867 match_token(rule_options, *av) == TOK_COMMENT) { 3868 action->arg1 = pack_object(tstate, 3869 default_state_name, IPFW_TLV_STATE_NAME); 3870 break; 3871 } 3872 if (*av[0] == ':') { 3873 if (strcmp(*av + 1, "any") == 0) 3874 action->arg1 = 0; 3875 else if (state_check_name(*av + 1) == 0) 3876 action->arg1 = pack_object(tstate, *av + 1, 3877 IPFW_TLV_STATE_NAME); 3878 else 3879 errx(EX_DATAERR, "Invalid state name %s", 3880 *av); 3881 av++; 3882 break; 3883 } 3884 errx(EX_DATAERR, "Invalid state name %s", *av); 3885 break; 3886 3887 case TOK_ABORT: 3888 action->opcode = O_REJECT; 3889 action->arg1 = ICMP_REJECT_ABORT; 3890 break; 3891 3892 case TOK_ABORT6: 3893 action->opcode = O_UNREACH6; 3894 action->arg1 = ICMP6_UNREACH_ABORT; 3895 break; 3896 3897 case TOK_ACCEPT: 3898 action->opcode = O_ACCEPT; 3899 break; 3900 3901 case TOK_DENY: 3902 action->opcode = O_DENY; 3903 action->arg1 = 0; 3904 break; 3905 3906 case TOK_REJECT: 3907 action->opcode = O_REJECT; 3908 action->arg1 = ICMP_UNREACH_HOST; 3909 break; 3910 3911 case TOK_RESET: 3912 action->opcode = O_REJECT; 3913 action->arg1 = ICMP_REJECT_RST; 3914 break; 3915 3916 case TOK_RESET6: 3917 action->opcode = O_UNREACH6; 3918 action->arg1 = ICMP6_UNREACH_RST; 3919 break; 3920 3921 case TOK_UNREACH: 3922 action->opcode = O_REJECT; 3923 NEED1("missing reject code"); 3924 fill_reject_code(&action->arg1, *av); 3925 av++; 3926 break; 3927 3928 case TOK_UNREACH6: 3929 action->opcode = O_UNREACH6; 3930 NEED1("missing unreach code"); 3931 fill_unreach6_code(&action->arg1, *av); 3932 av++; 3933 break; 3934 3935 case TOK_COUNT: 3936 action->opcode = O_COUNT; 3937 break; 3938 3939 case TOK_NAT: 3940 action->opcode = O_NAT; 3941 action->len = F_INSN_SIZE(ipfw_insn_nat); 3942 CHECK_ACTLEN; 3943 if (*av != NULL && _substrcmp(*av, "global") == 0) { 3944 action->arg1 = IP_FW_NAT44_GLOBAL; 3945 av++; 3946 break; 3947 } else 3948 goto chkarg; 3949 case TOK_QUEUE: 3950 action->opcode = O_QUEUE; 3951 goto chkarg; 3952 case TOK_PIPE: 3953 action->opcode = O_PIPE; 3954 goto chkarg; 3955 case TOK_SKIPTO: 3956 action->opcode = O_SKIPTO; 3957 goto chkarg; 3958 case TOK_NETGRAPH: 3959 action->opcode = O_NETGRAPH; 3960 goto chkarg; 3961 case TOK_NGTEE: 3962 action->opcode = O_NGTEE; 3963 goto chkarg; 3964 case TOK_DIVERT: 3965 action->opcode = O_DIVERT; 3966 goto chkarg; 3967 case TOK_TEE: 3968 action->opcode = O_TEE; 3969 goto chkarg; 3970 case TOK_CALL: 3971 action->opcode = O_CALLRETURN; 3972 chkarg: 3973 if (!av[0]) 3974 errx(EX_USAGE, "missing argument for %s", *(av - 1)); 3975 if (isdigit(**av)) { 3976 action->arg1 = strtoul(*av, NULL, 10); 3977 if (action->arg1 <= 0 || action->arg1 >= IP_FW_TABLEARG) 3978 errx(EX_DATAERR, "illegal argument for %s", 3979 *(av - 1)); 3980 } else if (_substrcmp(*av, "tablearg") == 0) { 3981 action->arg1 = IP_FW_TARG; 3982 } else if (i == TOK_DIVERT || i == TOK_TEE) { 3983 struct servent *s; 3984 setservent(1); 3985 s = getservbyname(av[0], "divert"); 3986 if (s != NULL) 3987 action->arg1 = ntohs(s->s_port); 3988 else 3989 errx(EX_DATAERR, "illegal divert/tee port"); 3990 } else 3991 errx(EX_DATAERR, "illegal argument for %s", *(av - 1)); 3992 av++; 3993 break; 3994 3995 case TOK_FORWARD: { 3996 /* 3997 * Locate the address-port separator (':' or ','). 3998 * Could be one of the following: 3999 * hostname:port 4000 * IPv4 a.b.c.d,port 4001 * IPv4 a.b.c.d:port 4002 * IPv6 w:x:y::z,port 4003 * IPv6 [w:x:y::z]:port 4004 */ 4005 struct sockaddr_storage result; 4006 struct addrinfo *res; 4007 char *s, *end; 4008 int family; 4009 u_short port_number = 0; 4010 4011 NEED1("missing forward address[:port]"); 4012 4013 if (_substrcmp(*av, "tablearg") == 0) { 4014 family = PF_INET; 4015 ((struct sockaddr_in*)&result)->sin_addr.s_addr = 4016 INADDR_ANY; 4017 } else { 4018 /* 4019 * Are we an bracket-enclosed IPv6 address? 4020 */ 4021 if (strchr(*av, '[')) 4022 (*av)++; 4023 4024 /* 4025 * locate the address-port separator (':' or ',') 4026 */ 4027 s = strchr(*av, ','); 4028 if (s == NULL) { 4029 s = strchr(*av, ']'); 4030 /* Prevent erroneous parsing on brackets. */ 4031 if (s != NULL) 4032 *(s++) = '\0'; 4033 else 4034 s = *av; 4035 4036 /* Distinguish between IPv4:port and IPv6 cases. */ 4037 s = strchr(s, ':'); 4038 if (s && strchr(s+1, ':')) 4039 s = NULL; /* no port */ 4040 } 4041 4042 if (s != NULL) { 4043 /* Terminate host portion and set s to start of port. */ 4044 *(s++) = '\0'; 4045 i = strtoport(s, &end, 0 /* base */, 0 /* proto */); 4046 if (s == end) 4047 errx(EX_DATAERR, 4048 "illegal forwarding port ``%s''", s); 4049 port_number = (u_short)i; 4050 } 4051 4052 /* 4053 * Resolve the host name or address to a family and a 4054 * network representation of the address. 4055 */ 4056 if (getaddrinfo(*av, NULL, NULL, &res)) 4057 errx(EX_DATAERR, NULL); 4058 /* Just use the first host in the answer. */ 4059 family = res->ai_family; 4060 memcpy(&result, res->ai_addr, res->ai_addrlen); 4061 freeaddrinfo(res); 4062 } 4063 4064 if (family == PF_INET) { 4065 ipfw_insn_sa *p = (ipfw_insn_sa *)action; 4066 4067 action->opcode = O_FORWARD_IP; 4068 action->len = F_INSN_SIZE(ipfw_insn_sa); 4069 CHECK_ACTLEN; 4070 4071 /* 4072 * In the kernel we assume AF_INET and use only 4073 * sin_port and sin_addr. Remember to set sin_len as 4074 * the routing code seems to use it too. 4075 */ 4076 p->sa.sin_len = sizeof(struct sockaddr_in); 4077 p->sa.sin_family = AF_INET; 4078 p->sa.sin_port = port_number; 4079 p->sa.sin_addr.s_addr = 4080 ((struct sockaddr_in *)&result)->sin_addr.s_addr; 4081 } else if (family == PF_INET6) { 4082 ipfw_insn_sa6 *p = (ipfw_insn_sa6 *)action; 4083 4084 action->opcode = O_FORWARD_IP6; 4085 action->len = F_INSN_SIZE(ipfw_insn_sa6); 4086 CHECK_ACTLEN; 4087 4088 p->sa.sin6_len = sizeof(struct sockaddr_in6); 4089 p->sa.sin6_family = AF_INET6; 4090 p->sa.sin6_port = port_number; 4091 p->sa.sin6_flowinfo = 0; 4092 p->sa.sin6_scope_id = 4093 ((struct sockaddr_in6 *)&result)->sin6_scope_id; 4094 bcopy(&((struct sockaddr_in6*)&result)->sin6_addr, 4095 &p->sa.sin6_addr, sizeof(p->sa.sin6_addr)); 4096 } else { 4097 errx(EX_DATAERR, "Invalid address family in forward action"); 4098 } 4099 av++; 4100 break; 4101 } 4102 case TOK_COMMENT: 4103 /* pretend it is a 'count' rule followed by the comment */ 4104 action->opcode = O_COUNT; 4105 av--; /* go back... */ 4106 break; 4107 4108 case TOK_SETFIB: 4109 { 4110 int numfibs; 4111 size_t intsize = sizeof(int); 4112 4113 action->opcode = O_SETFIB; 4114 NEED1("missing fib number"); 4115 if (_substrcmp(*av, "tablearg") == 0) { 4116 action->arg1 = IP_FW_TARG; 4117 } else { 4118 action->arg1 = strtoul(*av, NULL, 10); 4119 if (sysctlbyname("net.fibs", &numfibs, &intsize, 4120 NULL, 0) == -1) 4121 errx(EX_DATAERR, "fibs not suported.\n"); 4122 if (action->arg1 >= numfibs) /* Temporary */ 4123 errx(EX_DATAERR, "fib too large.\n"); 4124 /* Add high-order bit to fib to make room for tablearg*/ 4125 action->arg1 |= 0x8000; 4126 } 4127 av++; 4128 break; 4129 } 4130 4131 case TOK_SETDSCP: 4132 { 4133 int code; 4134 4135 action->opcode = O_SETDSCP; 4136 NEED1("missing DSCP code"); 4137 if (_substrcmp(*av, "tablearg") == 0) { 4138 action->arg1 = IP_FW_TARG; 4139 } else { 4140 if (isalpha(*av[0])) { 4141 if ((code = match_token(f_ipdscp, *av)) == -1) 4142 errx(EX_DATAERR, "Unknown DSCP code"); 4143 action->arg1 = code; 4144 } else 4145 action->arg1 = strtoul(*av, NULL, 10); 4146 /* 4147 * Add high-order bit to DSCP to make room 4148 * for tablearg 4149 */ 4150 action->arg1 |= 0x8000; 4151 } 4152 av++; 4153 break; 4154 } 4155 4156 case TOK_REASS: 4157 action->opcode = O_REASS; 4158 break; 4159 4160 case TOK_RETURN: 4161 fill_cmd(action, O_CALLRETURN, F_NOT, 0); 4162 break; 4163 4164 case TOK_TCPSETMSS: { 4165 u_long mss; 4166 uint16_t idx; 4167 4168 idx = pack_object(tstate, "tcp-setmss", IPFW_TLV_EACTION); 4169 if (idx == 0) 4170 errx(EX_DATAERR, "pack_object failed"); 4171 fill_cmd(action, O_EXTERNAL_ACTION, 0, idx); 4172 NEED1("Missing MSS value"); 4173 action = next_cmd(action, &ablen); 4174 action->len = 1; 4175 CHECK_ACTLEN; 4176 mss = strtoul(*av, NULL, 10); 4177 if (mss == 0 || mss > UINT16_MAX) 4178 errx(EX_USAGE, "invalid MSS value %s", *av); 4179 fill_cmd(action, O_EXTERNAL_DATA, 0, (uint16_t)mss); 4180 av++; 4181 break; 4182 } 4183 4184 default: 4185 av--; 4186 if (match_token(rule_eactions, *av) == -1) 4187 errx(EX_DATAERR, "invalid action %s\n", *av); 4188 /* 4189 * External actions support. 4190 * XXX: we support only syntax with instance name. 4191 * For known external actions (from rule_eactions list) 4192 * we can handle syntax directly. But with `eaction' 4193 * keyword we can use only `eaction <name> <instance>' 4194 * syntax. 4195 */ 4196 case TOK_EACTION: { 4197 uint16_t idx; 4198 4199 NEED1("Missing eaction name"); 4200 if (eaction_check_name(*av) != 0) 4201 errx(EX_DATAERR, "Invalid eaction name %s", *av); 4202 idx = pack_object(tstate, *av, IPFW_TLV_EACTION); 4203 if (idx == 0) 4204 errx(EX_DATAERR, "pack_object failed"); 4205 fill_cmd(action, O_EXTERNAL_ACTION, 0, idx); 4206 av++; 4207 NEED1("Missing eaction instance name"); 4208 action = next_cmd(action, &ablen); 4209 action->len = 1; 4210 CHECK_ACTLEN; 4211 if (eaction_check_name(*av) != 0) 4212 errx(EX_DATAERR, "Invalid eaction instance name %s", 4213 *av); 4214 /* 4215 * External action instance object has TLV type depended 4216 * from the external action name object index. Since we 4217 * currently don't know this index, use zero as TLV type. 4218 */ 4219 idx = pack_object(tstate, *av, 0); 4220 if (idx == 0) 4221 errx(EX_DATAERR, "pack_object failed"); 4222 fill_cmd(action, O_EXTERNAL_INSTANCE, 0, idx); 4223 av++; 4224 } 4225 } 4226 action = next_cmd(action, &ablen); 4227 4228 /* 4229 * [altq queuename] -- altq tag, optional 4230 * [log [logamount N]] -- log, optional 4231 * 4232 * If they exist, it go first in the cmdbuf, but then it is 4233 * skipped in the copy section to the end of the buffer. 4234 */ 4235 while (av[0] != NULL && (i = match_token(rule_action_params, *av)) != -1) { 4236 av++; 4237 switch (i) { 4238 case TOK_LOG: 4239 { 4240 ipfw_insn_log *c = (ipfw_insn_log *)cmd; 4241 int l; 4242 4243 if (have_log) 4244 errx(EX_DATAERR, 4245 "log cannot be specified more than once"); 4246 have_log = (ipfw_insn *)c; 4247 cmd->len = F_INSN_SIZE(ipfw_insn_log); 4248 CHECK_CMDLEN; 4249 cmd->opcode = O_LOG; 4250 if (av[0] && _substrcmp(*av, "logamount") == 0) { 4251 av++; 4252 NEED1("logamount requires argument"); 4253 l = atoi(*av); 4254 if (l < 0) 4255 errx(EX_DATAERR, 4256 "logamount must be positive"); 4257 c->max_log = l; 4258 av++; 4259 } else { 4260 len = sizeof(c->max_log); 4261 if (sysctlbyname("net.inet.ip.fw.verbose_limit", 4262 &c->max_log, &len, NULL, 0) == -1) { 4263 if (g_co.test_only) { 4264 c->max_log = 0; 4265 break; 4266 } 4267 errx(1, "sysctlbyname(\"%s\")", 4268 "net.inet.ip.fw.verbose_limit"); 4269 } 4270 } 4271 } 4272 break; 4273 4274 #ifndef NO_ALTQ 4275 case TOK_ALTQ: 4276 { 4277 ipfw_insn_altq *a = (ipfw_insn_altq *)cmd; 4278 4279 NEED1("missing altq queue name"); 4280 if (have_altq) 4281 errx(EX_DATAERR, 4282 "altq cannot be specified more than once"); 4283 have_altq = (ipfw_insn *)a; 4284 cmd->len = F_INSN_SIZE(ipfw_insn_altq); 4285 CHECK_CMDLEN; 4286 cmd->opcode = O_ALTQ; 4287 a->qid = altq_name_to_qid(*av); 4288 av++; 4289 } 4290 break; 4291 #endif 4292 4293 case TOK_TAG: 4294 case TOK_UNTAG: { 4295 uint16_t tag; 4296 4297 if (have_tag) 4298 errx(EX_USAGE, "tag and untag cannot be " 4299 "specified more than once"); 4300 GET_UINT_ARG(tag, IPFW_ARG_MIN, IPFW_ARG_MAX, i, 4301 rule_action_params); 4302 have_tag = cmd; 4303 fill_cmd(cmd, O_TAG, (i == TOK_TAG) ? 0: F_NOT, tag); 4304 av++; 4305 break; 4306 } 4307 4308 default: 4309 abort(); 4310 } 4311 cmd = next_cmd(cmd, &cblen); 4312 } 4313 4314 if (have_state) { /* must be a check-state, we are done */ 4315 if (*av != NULL && 4316 match_token(rule_options, *av) == TOK_COMMENT) { 4317 /* check-state has a comment */ 4318 av++; 4319 fill_comment(cmd, av, cblen); 4320 cmd = next_cmd(cmd, &cblen); 4321 av[0] = NULL; 4322 } 4323 goto done; 4324 } 4325 4326 #define OR_START(target) \ 4327 if (av[0] && (*av[0] == '(' || *av[0] == '{')) { \ 4328 if (open_par) \ 4329 errx(EX_USAGE, "nested \"(\" not allowed\n"); \ 4330 prev = NULL; \ 4331 open_par = 1; \ 4332 if ( (av[0])[1] == '\0') { \ 4333 av++; \ 4334 } else \ 4335 (*av)++; \ 4336 } \ 4337 target: \ 4338 4339 4340 #define CLOSE_PAR \ 4341 if (open_par) { \ 4342 if (av[0] && ( \ 4343 strcmp(*av, ")") == 0 || \ 4344 strcmp(*av, "}") == 0)) { \ 4345 prev = NULL; \ 4346 open_par = 0; \ 4347 av++; \ 4348 } else \ 4349 errx(EX_USAGE, "missing \")\"\n"); \ 4350 } 4351 4352 #define NOT_BLOCK \ 4353 if (av[0] && _substrcmp(*av, "not") == 0) { \ 4354 if (cmd->len & F_NOT) \ 4355 errx(EX_USAGE, "double \"not\" not allowed\n"); \ 4356 cmd->len |= F_NOT; \ 4357 av++; \ 4358 } 4359 4360 #define OR_BLOCK(target) \ 4361 if (av[0] && _substrcmp(*av, "or") == 0) { \ 4362 if (prev == NULL || open_par == 0) \ 4363 errx(EX_DATAERR, "invalid OR block"); \ 4364 prev->len |= F_OR; \ 4365 av++; \ 4366 goto target; \ 4367 } \ 4368 CLOSE_PAR; 4369 4370 first_cmd = cmd; 4371 4372 #if 0 4373 /* 4374 * MAC addresses, optional. 4375 * If we have this, we skip the part "proto from src to dst" 4376 * and jump straight to the option parsing. 4377 */ 4378 NOT_BLOCK; 4379 NEED1("missing protocol"); 4380 if (_substrcmp(*av, "MAC") == 0 || 4381 _substrcmp(*av, "mac") == 0) { 4382 av++; /* the "MAC" keyword */ 4383 add_mac(cmd, av); /* exits in case of errors */ 4384 cmd = next_cmd(cmd); 4385 av += 2; /* dst-mac and src-mac */ 4386 NOT_BLOCK; 4387 NEED1("missing mac type"); 4388 if (add_mactype(cmd, av[0])) 4389 cmd = next_cmd(cmd); 4390 av++; /* any or mac-type */ 4391 goto read_options; 4392 } 4393 #endif 4394 4395 /* 4396 * protocol, mandatory 4397 */ 4398 OR_START(get_proto); 4399 NOT_BLOCK; 4400 NEED1("missing protocol"); 4401 if (add_proto_compat(cmd, *av, &proto)) { 4402 av++; 4403 if (F_LEN(cmd) != 0) { 4404 prev = cmd; 4405 cmd = next_cmd(cmd, &cblen); 4406 } 4407 } else if (first_cmd != cmd) { 4408 errx(EX_DATAERR, "invalid protocol ``%s''", *av); 4409 } else { 4410 rule->flags |= IPFW_RULE_JUSTOPTS; 4411 goto read_options; 4412 } 4413 OR_BLOCK(get_proto); 4414 4415 first_cmd = cmd; /* update pointer to use in compact form */ 4416 4417 /* 4418 * "from", mandatory 4419 */ 4420 if ((av[0] == NULL) || _substrcmp(*av, "from") != 0) 4421 errx(EX_USAGE, "missing ``from''"); 4422 av++; 4423 4424 /* 4425 * source IP, mandatory 4426 */ 4427 OR_START(source_ip); 4428 NOT_BLOCK; /* optional "not" */ 4429 NEED1("missing source address"); 4430 if (add_src(cmd, *av, proto, cblen, tstate)) { 4431 av++; 4432 if (F_LEN(cmd) != 0) { /* ! any */ 4433 prev = cmd; 4434 cmd = next_cmd(cmd, &cblen); 4435 } 4436 } else 4437 errx(EX_USAGE, "bad source address %s", *av); 4438 OR_BLOCK(source_ip); 4439 4440 /* 4441 * source ports, optional 4442 */ 4443 NOT_BLOCK; /* optional "not" */ 4444 if ( av[0] != NULL ) { 4445 if (_substrcmp(*av, "any") == 0 || 4446 add_ports(cmd, *av, proto, O_IP_SRCPORT, cblen)) { 4447 av++; 4448 if (F_LEN(cmd) != 0) 4449 cmd = next_cmd(cmd, &cblen); 4450 } 4451 } 4452 4453 /* 4454 * "to", mandatory 4455 */ 4456 if ( (av[0] == NULL) || _substrcmp(*av, "to") != 0 ) 4457 errx(EX_USAGE, "missing ``to''"); 4458 av++; 4459 4460 /* 4461 * destination, mandatory 4462 */ 4463 OR_START(dest_ip); 4464 NOT_BLOCK; /* optional "not" */ 4465 NEED1("missing dst address"); 4466 if (add_dst(cmd, *av, proto, cblen, tstate)) { 4467 av++; 4468 if (F_LEN(cmd) != 0) { /* ! any */ 4469 prev = cmd; 4470 cmd = next_cmd(cmd, &cblen); 4471 } 4472 } else 4473 errx( EX_USAGE, "bad destination address %s", *av); 4474 OR_BLOCK(dest_ip); 4475 4476 /* 4477 * dest. ports, optional 4478 */ 4479 NOT_BLOCK; /* optional "not" */ 4480 if (av[0]) { 4481 if (_substrcmp(*av, "any") == 0 || 4482 add_ports(cmd, *av, proto, O_IP_DSTPORT, cblen)) { 4483 av++; 4484 if (F_LEN(cmd) != 0) 4485 cmd = next_cmd(cmd, &cblen); 4486 } 4487 } 4488 if (first_cmd == cmd) 4489 rule->flags |= IPFW_RULE_NOOPT; 4490 4491 read_options: 4492 prev = NULL; 4493 while ( av[0] != NULL ) { 4494 char *s; 4495 ipfw_insn_u32 *cmd32; /* alias for cmd */ 4496 4497 s = *av; 4498 cmd32 = (ipfw_insn_u32 *)cmd; 4499 4500 if (*s == '!') { /* alternate syntax for NOT */ 4501 if (cmd->len & F_NOT) 4502 errx(EX_USAGE, "double \"not\" not allowed\n"); 4503 cmd->len = F_NOT; 4504 s++; 4505 } 4506 i = match_token(rule_options, s); 4507 av++; 4508 switch(i) { 4509 case TOK_NOT: 4510 if (cmd->len & F_NOT) 4511 errx(EX_USAGE, "double \"not\" not allowed\n"); 4512 cmd->len = F_NOT; 4513 break; 4514 4515 case TOK_OR: 4516 if (open_par == 0 || prev == NULL) 4517 errx(EX_USAGE, "invalid \"or\" block\n"); 4518 prev->len |= F_OR; 4519 break; 4520 4521 case TOK_STARTBRACE: 4522 if (open_par) 4523 errx(EX_USAGE, "+nested \"(\" not allowed\n"); 4524 open_par = 1; 4525 break; 4526 4527 case TOK_ENDBRACE: 4528 if (!open_par) 4529 errx(EX_USAGE, "+missing \")\"\n"); 4530 open_par = 0; 4531 prev = NULL; 4532 break; 4533 4534 case TOK_IN: 4535 fill_cmd(cmd, O_IN, 0, 0); 4536 break; 4537 4538 case TOK_OUT: 4539 cmd->len ^= F_NOT; /* toggle F_NOT */ 4540 fill_cmd(cmd, O_IN, 0, 0); 4541 break; 4542 4543 case TOK_DIVERTED: 4544 fill_cmd(cmd, O_DIVERTED, 0, 3); 4545 break; 4546 4547 case TOK_DIVERTEDLOOPBACK: 4548 fill_cmd(cmd, O_DIVERTED, 0, 1); 4549 break; 4550 4551 case TOK_DIVERTEDOUTPUT: 4552 fill_cmd(cmd, O_DIVERTED, 0, 2); 4553 break; 4554 4555 case TOK_FRAG: 4556 fill_cmd(cmd, O_FRAG, 0, 0); 4557 break; 4558 4559 case TOK_LAYER2: 4560 fill_cmd(cmd, O_LAYER2, 0, 0); 4561 break; 4562 4563 case TOK_XMIT: 4564 case TOK_RECV: 4565 case TOK_VIA: 4566 NEED1("recv, xmit, via require interface name" 4567 " or address"); 4568 fill_iface((ipfw_insn_if *)cmd, av[0], cblen, tstate); 4569 av++; 4570 if (F_LEN(cmd) == 0) /* not a valid address */ 4571 break; 4572 if (i == TOK_XMIT) 4573 cmd->opcode = O_XMIT; 4574 else if (i == TOK_RECV) 4575 cmd->opcode = O_RECV; 4576 else if (i == TOK_VIA) 4577 cmd->opcode = O_VIA; 4578 break; 4579 4580 case TOK_ICMPTYPES: 4581 NEED1("icmptypes requires list of types"); 4582 fill_icmptypes((ipfw_insn_u32 *)cmd, *av); 4583 av++; 4584 break; 4585 4586 case TOK_ICMP6TYPES: 4587 NEED1("icmptypes requires list of types"); 4588 fill_icmp6types((ipfw_insn_icmp6 *)cmd, *av, cblen); 4589 av++; 4590 break; 4591 4592 case TOK_IPTTL: 4593 NEED1("ipttl requires TTL"); 4594 if (strpbrk(*av, "-,")) { 4595 if (!add_ports(cmd, *av, 0, O_IPTTL, cblen)) 4596 errx(EX_DATAERR, "invalid ipttl %s", *av); 4597 } else 4598 fill_cmd(cmd, O_IPTTL, 0, strtoul(*av, NULL, 0)); 4599 av++; 4600 break; 4601 4602 case TOK_IPID: 4603 NEED1("ipid requires id"); 4604 if (strpbrk(*av, "-,")) { 4605 if (!add_ports(cmd, *av, 0, O_IPID, cblen)) 4606 errx(EX_DATAERR, "invalid ipid %s", *av); 4607 } else 4608 fill_cmd(cmd, O_IPID, 0, strtoul(*av, NULL, 0)); 4609 av++; 4610 break; 4611 4612 case TOK_IPLEN: 4613 NEED1("iplen requires length"); 4614 if (strpbrk(*av, "-,")) { 4615 if (!add_ports(cmd, *av, 0, O_IPLEN, cblen)) 4616 errx(EX_DATAERR, "invalid ip len %s", *av); 4617 } else 4618 fill_cmd(cmd, O_IPLEN, 0, strtoul(*av, NULL, 0)); 4619 av++; 4620 break; 4621 4622 case TOK_IPVER: 4623 NEED1("ipver requires version"); 4624 fill_cmd(cmd, O_IPVER, 0, strtoul(*av, NULL, 0)); 4625 av++; 4626 break; 4627 4628 case TOK_IPPRECEDENCE: 4629 NEED1("ipprecedence requires value"); 4630 fill_cmd(cmd, O_IPPRECEDENCE, 0, 4631 (strtoul(*av, NULL, 0) & 7) << 5); 4632 av++; 4633 break; 4634 4635 case TOK_DSCP: 4636 NEED1("missing DSCP code"); 4637 fill_dscp(cmd, *av, cblen); 4638 av++; 4639 break; 4640 4641 case TOK_IPOPTS: 4642 NEED1("missing argument for ipoptions"); 4643 fill_flags_cmd(cmd, O_IPOPT, f_ipopts, *av); 4644 av++; 4645 break; 4646 4647 case TOK_IPTOS: 4648 NEED1("missing argument for iptos"); 4649 fill_flags_cmd(cmd, O_IPTOS, f_iptos, *av); 4650 av++; 4651 break; 4652 4653 case TOK_UID: 4654 NEED1("uid requires argument"); 4655 { 4656 char *end; 4657 uid_t uid; 4658 struct passwd *pwd; 4659 4660 cmd->opcode = O_UID; 4661 uid = strtoul(*av, &end, 0); 4662 pwd = (*end == '\0') ? getpwuid(uid) : getpwnam(*av); 4663 if (pwd == NULL) 4664 errx(EX_DATAERR, "uid \"%s\" nonexistent", *av); 4665 cmd32->d[0] = pwd->pw_uid; 4666 cmd->len |= F_INSN_SIZE(ipfw_insn_u32); 4667 av++; 4668 } 4669 break; 4670 4671 case TOK_GID: 4672 NEED1("gid requires argument"); 4673 { 4674 char *end; 4675 gid_t gid; 4676 struct group *grp; 4677 4678 cmd->opcode = O_GID; 4679 gid = strtoul(*av, &end, 0); 4680 grp = (*end == '\0') ? getgrgid(gid) : getgrnam(*av); 4681 if (grp == NULL) 4682 errx(EX_DATAERR, "gid \"%s\" nonexistent", *av); 4683 cmd32->d[0] = grp->gr_gid; 4684 cmd->len |= F_INSN_SIZE(ipfw_insn_u32); 4685 av++; 4686 } 4687 break; 4688 4689 case TOK_JAIL: 4690 NEED1("jail requires argument"); 4691 { 4692 char *end; 4693 int jid; 4694 4695 cmd->opcode = O_JAIL; 4696 /* 4697 * If av is a number, then we'll just pass it as-is. If 4698 * it's a name, try to resolve that to a jid. 4699 * 4700 * We save the jail_getid(3) call for a fallback because 4701 * it entails an unconditional trip to the kernel to 4702 * either validate a jid or resolve a name to a jid. 4703 * This specific token doesn't currently require a 4704 * jid to be an active jail, so we save a transition 4705 * by simply using a number that we're given. 4706 */ 4707 jid = strtoul(*av, &end, 10); 4708 if (*end != '\0') { 4709 jid = jail_getid(*av); 4710 if (jid < 0) 4711 errx(EX_DATAERR, "%s", jail_errmsg); 4712 } 4713 cmd32->d[0] = (uint32_t)jid; 4714 cmd->len |= F_INSN_SIZE(ipfw_insn_u32); 4715 av++; 4716 } 4717 break; 4718 4719 case TOK_ESTAB: 4720 fill_cmd(cmd, O_ESTAB, 0, 0); 4721 break; 4722 4723 case TOK_SETUP: 4724 fill_cmd(cmd, O_TCPFLAGS, 0, 4725 (TH_SYN) | ( (TH_ACK) & 0xff) <<8 ); 4726 break; 4727 4728 case TOK_TCPDATALEN: 4729 NEED1("tcpdatalen requires length"); 4730 if (strpbrk(*av, "-,")) { 4731 if (!add_ports(cmd, *av, 0, O_TCPDATALEN, cblen)) 4732 errx(EX_DATAERR, "invalid tcpdata len %s", *av); 4733 } else 4734 fill_cmd(cmd, O_TCPDATALEN, 0, 4735 strtoul(*av, NULL, 0)); 4736 av++; 4737 break; 4738 4739 case TOK_TCPOPTS: 4740 NEED1("missing argument for tcpoptions"); 4741 fill_flags_cmd(cmd, O_TCPOPTS, f_tcpopts, *av); 4742 av++; 4743 break; 4744 4745 case TOK_TCPSEQ: 4746 case TOK_TCPACK: 4747 NEED1("tcpseq/tcpack requires argument"); 4748 cmd->len = F_INSN_SIZE(ipfw_insn_u32); 4749 cmd->opcode = (i == TOK_TCPSEQ) ? O_TCPSEQ : O_TCPACK; 4750 cmd32->d[0] = htonl(strtoul(*av, NULL, 0)); 4751 av++; 4752 break; 4753 4754 case TOK_TCPMSS: 4755 case TOK_TCPWIN: 4756 NEED1("tcpmss/tcpwin requires size"); 4757 if (strpbrk(*av, "-,")) { 4758 if (add_ports(cmd, *av, 0, 4759 i == TOK_TCPWIN ? O_TCPWIN : O_TCPMSS, 4760 cblen) == NULL) 4761 errx(EX_DATAERR, "invalid %s size %s", 4762 s, *av); 4763 } else 4764 fill_cmd(cmd, i == TOK_TCPWIN ? O_TCPWIN : 4765 O_TCPMSS, 0, strtoul(*av, NULL, 0)); 4766 av++; 4767 break; 4768 4769 case TOK_TCPFLAGS: 4770 NEED1("missing argument for tcpflags"); 4771 cmd->opcode = O_TCPFLAGS; 4772 fill_flags_cmd(cmd, O_TCPFLAGS, f_tcpflags, *av); 4773 av++; 4774 break; 4775 4776 case TOK_KEEPSTATE: 4777 case TOK_RECORDSTATE: { 4778 uint16_t uidx; 4779 4780 if (open_par) 4781 errx(EX_USAGE, "keep-state or record-state cannot be part " 4782 "of an or block"); 4783 if (have_state) 4784 errx(EX_USAGE, "only one of keep-state, record-state, " 4785 " limit and set-limit is allowed"); 4786 if (*av != NULL && *av[0] == ':') { 4787 if (state_check_name(*av + 1) != 0) 4788 errx(EX_DATAERR, 4789 "Invalid state name %s", *av); 4790 uidx = pack_object(tstate, *av + 1, 4791 IPFW_TLV_STATE_NAME); 4792 av++; 4793 } else 4794 uidx = pack_object(tstate, default_state_name, 4795 IPFW_TLV_STATE_NAME); 4796 have_state = cmd; 4797 have_rstate = i == TOK_RECORDSTATE; 4798 fill_cmd(cmd, O_KEEP_STATE, 0, uidx); 4799 break; 4800 } 4801 4802 case TOK_LIMIT: 4803 case TOK_SETLIMIT: { 4804 ipfw_insn_limit *c = (ipfw_insn_limit *)cmd; 4805 int val; 4806 4807 if (open_par) 4808 errx(EX_USAGE, 4809 "limit or set-limit cannot be part of an or block"); 4810 if (have_state) 4811 errx(EX_USAGE, "only one of keep-state, record-state, " 4812 " limit and set-limit is allowed"); 4813 have_state = cmd; 4814 have_rstate = i == TOK_SETLIMIT; 4815 4816 cmd->len = F_INSN_SIZE(ipfw_insn_limit); 4817 CHECK_CMDLEN; 4818 cmd->opcode = O_LIMIT; 4819 c->limit_mask = c->conn_limit = 0; 4820 4821 while ( av[0] != NULL ) { 4822 if ((val = match_token(limit_masks, *av)) <= 0) 4823 break; 4824 c->limit_mask |= val; 4825 av++; 4826 } 4827 4828 if (c->limit_mask == 0) 4829 errx(EX_USAGE, "limit: missing limit mask"); 4830 4831 GET_UINT_ARG(c->conn_limit, IPFW_ARG_MIN, IPFW_ARG_MAX, 4832 TOK_LIMIT, rule_options); 4833 av++; 4834 4835 if (*av != NULL && *av[0] == ':') { 4836 if (state_check_name(*av + 1) != 0) 4837 errx(EX_DATAERR, 4838 "Invalid state name %s", *av); 4839 cmd->arg1 = pack_object(tstate, *av + 1, 4840 IPFW_TLV_STATE_NAME); 4841 av++; 4842 } else 4843 cmd->arg1 = pack_object(tstate, 4844 default_state_name, IPFW_TLV_STATE_NAME); 4845 break; 4846 } 4847 4848 case TOK_PROTO: 4849 NEED1("missing protocol"); 4850 if (add_proto(cmd, *av, &proto)) { 4851 av++; 4852 } else 4853 errx(EX_DATAERR, "invalid protocol ``%s''", 4854 *av); 4855 break; 4856 4857 case TOK_SRCIP: 4858 NEED1("missing source IP"); 4859 if (add_srcip(cmd, *av, cblen, tstate)) { 4860 av++; 4861 } 4862 break; 4863 4864 case TOK_DSTIP: 4865 NEED1("missing destination IP"); 4866 if (add_dstip(cmd, *av, cblen, tstate)) { 4867 av++; 4868 } 4869 break; 4870 4871 case TOK_SRCIP6: 4872 NEED1("missing source IP6"); 4873 if (add_srcip6(cmd, *av, cblen, tstate)) { 4874 av++; 4875 } 4876 break; 4877 4878 case TOK_DSTIP6: 4879 NEED1("missing destination IP6"); 4880 if (add_dstip6(cmd, *av, cblen, tstate)) { 4881 av++; 4882 } 4883 break; 4884 4885 case TOK_SRCPORT: 4886 NEED1("missing source port"); 4887 if (_substrcmp(*av, "any") == 0 || 4888 add_ports(cmd, *av, proto, O_IP_SRCPORT, cblen)) { 4889 av++; 4890 } else 4891 errx(EX_DATAERR, "invalid source port %s", *av); 4892 break; 4893 4894 case TOK_DSTPORT: 4895 NEED1("missing destination port"); 4896 if (_substrcmp(*av, "any") == 0 || 4897 add_ports(cmd, *av, proto, O_IP_DSTPORT, cblen)) { 4898 av++; 4899 } else 4900 errx(EX_DATAERR, "invalid destination port %s", 4901 *av); 4902 break; 4903 4904 case TOK_MAC: 4905 if (add_mac(cmd, av, cblen)) 4906 av += 2; 4907 break; 4908 4909 case TOK_MACTYPE: 4910 NEED1("missing mac type"); 4911 if (!add_mactype(cmd, *av, cblen)) 4912 errx(EX_DATAERR, "invalid mac type %s", *av); 4913 av++; 4914 break; 4915 4916 case TOK_VERREVPATH: 4917 fill_cmd(cmd, O_VERREVPATH, 0, 0); 4918 break; 4919 4920 case TOK_VERSRCREACH: 4921 fill_cmd(cmd, O_VERSRCREACH, 0, 0); 4922 break; 4923 4924 case TOK_ANTISPOOF: 4925 fill_cmd(cmd, O_ANTISPOOF, 0, 0); 4926 break; 4927 4928 case TOK_IPSEC: 4929 fill_cmd(cmd, O_IPSEC, 0, 0); 4930 break; 4931 4932 case TOK_IPV6: 4933 fill_cmd(cmd, O_IP6, 0, 0); 4934 break; 4935 4936 case TOK_IPV4: 4937 fill_cmd(cmd, O_IP4, 0, 0); 4938 break; 4939 4940 case TOK_EXT6HDR: 4941 fill_ext6hdr( cmd, *av ); 4942 av++; 4943 break; 4944 4945 case TOK_FLOWID: 4946 if (proto != IPPROTO_IPV6 ) 4947 errx( EX_USAGE, "flow-id filter is active " 4948 "only for ipv6 protocol\n"); 4949 fill_flow6( (ipfw_insn_u32 *) cmd, *av, cblen); 4950 av++; 4951 break; 4952 4953 case TOK_COMMENT: 4954 fill_comment(cmd, av, cblen); 4955 av[0]=NULL; 4956 break; 4957 4958 case TOK_TAGGED: 4959 if (av[0] && strpbrk(*av, "-,")) { 4960 if (!add_ports(cmd, *av, 0, O_TAGGED, cblen)) 4961 errx(EX_DATAERR, "tagged: invalid tag" 4962 " list: %s", *av); 4963 } 4964 else { 4965 uint16_t tag; 4966 4967 GET_UINT_ARG(tag, IPFW_ARG_MIN, IPFW_ARG_MAX, 4968 TOK_TAGGED, rule_options); 4969 fill_cmd(cmd, O_TAGGED, 0, tag); 4970 } 4971 av++; 4972 break; 4973 4974 case TOK_FIB: 4975 NEED1("fib requires fib number"); 4976 fill_cmd(cmd, O_FIB, 0, strtoul(*av, NULL, 0)); 4977 av++; 4978 break; 4979 case TOK_SOCKARG: 4980 fill_cmd(cmd, O_SOCKARG, 0, 0); 4981 break; 4982 4983 case TOK_LOOKUP: { 4984 ipfw_insn_u32 *c = (ipfw_insn_u32 *)cmd; 4985 int j; 4986 4987 if (!av[0] || !av[1]) 4988 errx(EX_USAGE, "format: lookup argument tablenum"); 4989 cmd->opcode = O_IP_DST_LOOKUP; 4990 cmd->len |= F_INSN_SIZE(ipfw_insn) + 2; 4991 i = match_token(rule_options, *av); 4992 for (j = 0; lookup_key[j] >= 0 ; j++) { 4993 if (i == lookup_key[j]) 4994 break; 4995 } 4996 if (lookup_key[j] <= 0) 4997 errx(EX_USAGE, "format: cannot lookup on %s", *av); 4998 __PAST_END(c->d, 1) = j; // i converted to option 4999 av++; 5000 5001 if ((j = pack_table(tstate, *av)) == 0) 5002 errx(EX_DATAERR, "Invalid table name: %s", *av); 5003 5004 cmd->arg1 = j; 5005 av++; 5006 } 5007 break; 5008 case TOK_FLOW: 5009 NEED1("missing table name"); 5010 if (strncmp(*av, "table(", 6) != 0) 5011 errx(EX_DATAERR, 5012 "enclose table name into \"table()\""); 5013 fill_table(cmd, *av, O_IP_FLOW_LOOKUP, tstate); 5014 av++; 5015 break; 5016 5017 case TOK_SKIPACTION: 5018 if (have_skipcmd) 5019 errx(EX_USAGE, "only one defer-action " 5020 "is allowed"); 5021 have_skipcmd = cmd; 5022 fill_cmd(cmd, O_SKIP_ACTION, 0, 0); 5023 break; 5024 5025 default: 5026 errx(EX_USAGE, "unrecognised option [%d] %s\n", i, s); 5027 } 5028 if (F_LEN(cmd) > 0) { /* prepare to advance */ 5029 prev = cmd; 5030 cmd = next_cmd(cmd, &cblen); 5031 } 5032 } 5033 5034 done: 5035 5036 if (!have_state && have_skipcmd) 5037 warnx("Rule contains \"defer-immediate-action\" " 5038 "and doesn't contain any state-related options."); 5039 5040 /* 5041 * Now copy stuff into the rule. 5042 * If we have a keep-state option, the first instruction 5043 * must be a PROBE_STATE (which is generated here). 5044 * If we have a LOG option, it was stored as the first command, 5045 * and now must be moved to the top of the action part. 5046 */ 5047 dst = (ipfw_insn *)rule->cmd; 5048 5049 /* 5050 * First thing to write into the command stream is the match probability. 5051 */ 5052 if (match_prob != 1) { /* 1 means always match */ 5053 dst->opcode = O_PROB; 5054 dst->len = 2; 5055 *((int32_t *)(dst+1)) = (int32_t)(match_prob * 0x7fffffff); 5056 dst += dst->len; 5057 } 5058 5059 /* 5060 * generate O_PROBE_STATE if necessary 5061 */ 5062 if (have_state && have_state->opcode != O_CHECK_STATE && !have_rstate) { 5063 fill_cmd(dst, O_PROBE_STATE, 0, have_state->arg1); 5064 dst = next_cmd(dst, &rblen); 5065 } 5066 5067 /* 5068 * copy all commands but O_LOG, O_KEEP_STATE, O_LIMIT, O_ALTQ, O_TAG, 5069 * O_SKIP_ACTION 5070 */ 5071 for (src = (ipfw_insn *)cmdbuf; src != cmd; src += i) { 5072 i = F_LEN(src); 5073 CHECK_RBUFLEN(i); 5074 5075 switch (src->opcode) { 5076 case O_LOG: 5077 case O_KEEP_STATE: 5078 case O_LIMIT: 5079 case O_ALTQ: 5080 case O_TAG: 5081 case O_SKIP_ACTION: 5082 break; 5083 default: 5084 bcopy(src, dst, i * sizeof(uint32_t)); 5085 dst += i; 5086 } 5087 } 5088 5089 /* 5090 * put back the have_state command as last opcode 5091 */ 5092 if (have_state && have_state->opcode != O_CHECK_STATE) { 5093 i = F_LEN(have_state); 5094 CHECK_RBUFLEN(i); 5095 bcopy(have_state, dst, i * sizeof(uint32_t)); 5096 dst += i; 5097 } 5098 5099 /* 5100 * put back the have_skipcmd command as very last opcode 5101 */ 5102 if (have_skipcmd) { 5103 i = F_LEN(have_skipcmd); 5104 CHECK_RBUFLEN(i); 5105 bcopy(have_skipcmd, dst, i * sizeof(uint32_t)); 5106 dst += i; 5107 } 5108 5109 /* 5110 * start action section 5111 */ 5112 rule->act_ofs = dst - rule->cmd; 5113 5114 /* put back O_LOG, O_ALTQ, O_TAG if necessary */ 5115 if (have_log) { 5116 i = F_LEN(have_log); 5117 CHECK_RBUFLEN(i); 5118 bcopy(have_log, dst, i * sizeof(uint32_t)); 5119 dst += i; 5120 } 5121 if (have_altq) { 5122 i = F_LEN(have_altq); 5123 CHECK_RBUFLEN(i); 5124 bcopy(have_altq, dst, i * sizeof(uint32_t)); 5125 dst += i; 5126 } 5127 if (have_tag) { 5128 i = F_LEN(have_tag); 5129 CHECK_RBUFLEN(i); 5130 bcopy(have_tag, dst, i * sizeof(uint32_t)); 5131 dst += i; 5132 } 5133 5134 /* 5135 * copy all other actions 5136 */ 5137 for (src = (ipfw_insn *)actbuf; src != action; src += i) { 5138 i = F_LEN(src); 5139 CHECK_RBUFLEN(i); 5140 bcopy(src, dst, i * sizeof(uint32_t)); 5141 dst += i; 5142 } 5143 5144 rule->cmd_len = (uint32_t *)dst - (uint32_t *)(rule->cmd); 5145 *rbufsize = (char *)dst - (char *)rule; 5146 } 5147 5148 static int 5149 compare_ntlv(const void *_a, const void *_b) 5150 { 5151 const ipfw_obj_ntlv *a, *b; 5152 5153 a = (const ipfw_obj_ntlv *)_a; 5154 b = (const ipfw_obj_ntlv *)_b; 5155 5156 if (a->set < b->set) 5157 return (-1); 5158 else if (a->set > b->set) 5159 return (1); 5160 5161 if (a->idx < b->idx) 5162 return (-1); 5163 else if (a->idx > b->idx) 5164 return (1); 5165 5166 if (a->head.type < b->head.type) 5167 return (-1); 5168 else if (a->head.type > b->head.type) 5169 return (1); 5170 5171 return (0); 5172 } 5173 5174 /* 5175 * Provide kernel with sorted list of referenced objects 5176 */ 5177 static void 5178 object_sort_ctlv(ipfw_obj_ctlv *ctlv) 5179 { 5180 5181 qsort(ctlv + 1, ctlv->count, ctlv->objsize, compare_ntlv); 5182 } 5183 5184 struct object_kt { 5185 uint16_t uidx; 5186 uint16_t type; 5187 }; 5188 static int 5189 compare_object_kntlv(const void *k, const void *v) 5190 { 5191 const ipfw_obj_ntlv *ntlv; 5192 struct object_kt key; 5193 5194 key = *((const struct object_kt *)k); 5195 ntlv = (const ipfw_obj_ntlv *)v; 5196 5197 if (key.uidx < ntlv->idx) 5198 return (-1); 5199 else if (key.uidx > ntlv->idx) 5200 return (1); 5201 5202 if (key.type < ntlv->head.type) 5203 return (-1); 5204 else if (key.type > ntlv->head.type) 5205 return (1); 5206 5207 return (0); 5208 } 5209 5210 /* 5211 * Finds object name in @ctlv by @idx and @type. 5212 * Uses the following facts: 5213 * 1) All TLVs are the same size 5214 * 2) Kernel implementation provides already sorted list. 5215 * 5216 * Returns table name or NULL. 5217 */ 5218 static char * 5219 object_search_ctlv(ipfw_obj_ctlv *ctlv, uint16_t idx, uint16_t type) 5220 { 5221 ipfw_obj_ntlv *ntlv; 5222 struct object_kt key; 5223 5224 key.uidx = idx; 5225 key.type = type; 5226 5227 ntlv = bsearch(&key, (ctlv + 1), ctlv->count, ctlv->objsize, 5228 compare_object_kntlv); 5229 5230 if (ntlv != NULL) 5231 return (ntlv->name); 5232 5233 return (NULL); 5234 } 5235 5236 static char * 5237 table_search_ctlv(ipfw_obj_ctlv *ctlv, uint16_t idx) 5238 { 5239 5240 return (object_search_ctlv(ctlv, idx, IPFW_TLV_TBL_NAME)); 5241 } 5242 5243 /* 5244 * Adds one or more rules to ipfw chain. 5245 * Data layout: 5246 * Request: 5247 * [ 5248 * ip_fw3_opheader 5249 * [ ipfw_obj_ctlv(IPFW_TLV_TBL_LIST) ipfw_obj_ntlv x N ] (optional *1) 5250 * [ ipfw_obj_ctlv(IPFW_TLV_RULE_LIST) [ ip_fw_rule ip_fw_insn ] x N ] (*2) (*3) 5251 * ] 5252 * Reply: 5253 * [ 5254 * ip_fw3_opheader 5255 * [ ipfw_obj_ctlv(IPFW_TLV_TBL_LIST) ipfw_obj_ntlv x N ] (optional) 5256 * [ ipfw_obj_ctlv(IPFW_TLV_RULE_LIST) [ ip_fw_rule ip_fw_insn ] x N ] 5257 * ] 5258 * 5259 * Rules in reply are modified to store their actual ruleset number. 5260 * 5261 * (*1) TLVs inside IPFW_TLV_TBL_LIST needs to be sorted ascending 5262 * according to their idx field and there has to be no duplicates. 5263 * (*2) Numbered rules inside IPFW_TLV_RULE_LIST needs to be sorted ascending. 5264 * (*3) Each ip_fw structure needs to be aligned to u64 boundary. 5265 */ 5266 void 5267 ipfw_add(char *av[]) 5268 { 5269 uint32_t rulebuf[1024]; 5270 int rbufsize, default_off, tlen, rlen; 5271 size_t sz; 5272 struct tidx ts; 5273 struct ip_fw_rule *rule; 5274 caddr_t tbuf; 5275 ip_fw3_opheader *op3; 5276 ipfw_obj_ctlv *ctlv, *tstate; 5277 5278 rbufsize = sizeof(rulebuf); 5279 memset(rulebuf, 0, rbufsize); 5280 memset(&ts, 0, sizeof(ts)); 5281 5282 /* Optimize case with no tables */ 5283 default_off = sizeof(ipfw_obj_ctlv) + sizeof(ip_fw3_opheader); 5284 op3 = (ip_fw3_opheader *)rulebuf; 5285 ctlv = (ipfw_obj_ctlv *)(op3 + 1); 5286 rule = (struct ip_fw_rule *)(ctlv + 1); 5287 rbufsize -= default_off; 5288 5289 compile_rule(av, (uint32_t *)rule, &rbufsize, &ts); 5290 /* Align rule size to u64 boundary */ 5291 rlen = roundup2(rbufsize, sizeof(uint64_t)); 5292 5293 tbuf = NULL; 5294 sz = 0; 5295 tstate = NULL; 5296 if (ts.count != 0) { 5297 /* Some tables. We have to alloc more data */ 5298 tlen = ts.count * sizeof(ipfw_obj_ntlv); 5299 sz = default_off + sizeof(ipfw_obj_ctlv) + tlen + rlen; 5300 5301 if ((tbuf = calloc(1, sz)) == NULL) 5302 err(EX_UNAVAILABLE, "malloc() failed for IP_FW_ADD"); 5303 op3 = (ip_fw3_opheader *)tbuf; 5304 /* Tables first */ 5305 ctlv = (ipfw_obj_ctlv *)(op3 + 1); 5306 ctlv->head.type = IPFW_TLV_TBLNAME_LIST; 5307 ctlv->head.length = sizeof(ipfw_obj_ctlv) + tlen; 5308 ctlv->count = ts.count; 5309 ctlv->objsize = sizeof(ipfw_obj_ntlv); 5310 memcpy(ctlv + 1, ts.idx, tlen); 5311 object_sort_ctlv(ctlv); 5312 tstate = ctlv; 5313 /* Rule next */ 5314 ctlv = (ipfw_obj_ctlv *)((caddr_t)ctlv + ctlv->head.length); 5315 ctlv->head.type = IPFW_TLV_RULE_LIST; 5316 ctlv->head.length = sizeof(ipfw_obj_ctlv) + rlen; 5317 ctlv->count = 1; 5318 memcpy(ctlv + 1, rule, rbufsize); 5319 } else { 5320 /* Simply add header */ 5321 sz = rlen + default_off; 5322 memset(ctlv, 0, sizeof(*ctlv)); 5323 ctlv->head.type = IPFW_TLV_RULE_LIST; 5324 ctlv->head.length = sizeof(ipfw_obj_ctlv) + rlen; 5325 ctlv->count = 1; 5326 } 5327 5328 if (do_get3(IP_FW_XADD, op3, &sz) != 0) 5329 err(EX_UNAVAILABLE, "getsockopt(%s)", "IP_FW_XADD"); 5330 5331 if (!g_co.do_quiet) { 5332 struct format_opts sfo; 5333 struct buf_pr bp; 5334 memset(&sfo, 0, sizeof(sfo)); 5335 sfo.tstate = tstate; 5336 sfo.set_mask = (uint32_t)(-1); 5337 bp_alloc(&bp, 4096); 5338 show_static_rule(&g_co, &sfo, &bp, rule, NULL); 5339 printf("%s", bp.buf); 5340 bp_free(&bp); 5341 } 5342 5343 if (tbuf != NULL) 5344 free(tbuf); 5345 5346 if (ts.idx != NULL) 5347 free(ts.idx); 5348 } 5349 5350 /* 5351 * clear the counters or the log counters. 5352 * optname has the following values: 5353 * 0 (zero both counters and logging) 5354 * 1 (zero logging only) 5355 */ 5356 void 5357 ipfw_zero(int ac, char *av[], int optname) 5358 { 5359 ipfw_range_tlv rt; 5360 char const *errstr; 5361 char const *name = optname ? "RESETLOG" : "ZERO"; 5362 uint32_t arg; 5363 int failed = EX_OK; 5364 5365 optname = optname ? IP_FW_XRESETLOG : IP_FW_XZERO; 5366 av++; ac--; 5367 5368 if (ac == 0) { 5369 /* clear all entries */ 5370 memset(&rt, 0, sizeof(rt)); 5371 rt.flags = IPFW_RCFLAG_ALL; 5372 if (do_range_cmd(optname, &rt) < 0) 5373 err(EX_UNAVAILABLE, "setsockopt(IP_FW_X%s)", name); 5374 if (!g_co.do_quiet) 5375 printf("%s.\n", optname == IP_FW_XZERO ? 5376 "Accounting cleared":"Logging counts reset"); 5377 5378 return; 5379 } 5380 5381 while (ac) { 5382 /* Rule number */ 5383 if (isdigit(**av)) { 5384 arg = strtonum(*av, 0, 0xffff, &errstr); 5385 if (errstr) 5386 errx(EX_DATAERR, 5387 "invalid rule number %s\n", *av); 5388 memset(&rt, 0, sizeof(rt)); 5389 rt.start_rule = arg; 5390 rt.end_rule = arg; 5391 rt.flags |= IPFW_RCFLAG_RANGE; 5392 if (g_co.use_set != 0) { 5393 rt.set = g_co.use_set - 1; 5394 rt.flags |= IPFW_RCFLAG_SET; 5395 } 5396 if (do_range_cmd(optname, &rt) != 0) { 5397 warn("rule %u: setsockopt(IP_FW_X%s)", 5398 arg, name); 5399 failed = EX_UNAVAILABLE; 5400 } else if (rt.new_set == 0) { 5401 printf("Entry %d not found\n", arg); 5402 failed = EX_UNAVAILABLE; 5403 } else if (!g_co.do_quiet) 5404 printf("Entry %d %s.\n", arg, 5405 optname == IP_FW_XZERO ? 5406 "cleared" : "logging count reset"); 5407 } else { 5408 errx(EX_USAGE, "invalid rule number ``%s''", *av); 5409 } 5410 av++; ac--; 5411 } 5412 if (failed != EX_OK) 5413 exit(failed); 5414 } 5415 5416 void 5417 ipfw_flush(int force) 5418 { 5419 ipfw_range_tlv rt; 5420 5421 if (!force && !g_co.do_quiet) { /* need to ask user */ 5422 int c; 5423 5424 printf("Are you sure? [yn] "); 5425 fflush(stdout); 5426 do { 5427 c = toupper(getc(stdin)); 5428 while (c != '\n' && getc(stdin) != '\n') 5429 if (feof(stdin)) 5430 return; /* and do not flush */ 5431 } while (c != 'Y' && c != 'N'); 5432 printf("\n"); 5433 if (c == 'N') /* user said no */ 5434 return; 5435 } 5436 if (g_co.do_pipe) { 5437 dummynet_flush(); 5438 return; 5439 } 5440 /* `ipfw set N flush` - is the same that `ipfw delete set N` */ 5441 memset(&rt, 0, sizeof(rt)); 5442 if (g_co.use_set != 0) { 5443 rt.set = g_co.use_set - 1; 5444 rt.flags = IPFW_RCFLAG_SET; 5445 } else 5446 rt.flags = IPFW_RCFLAG_ALL; 5447 if (do_range_cmd(IP_FW_XDEL, &rt) != 0) 5448 err(EX_UNAVAILABLE, "setsockopt(IP_FW_XDEL)"); 5449 if (!g_co.do_quiet) 5450 printf("Flushed all %s.\n", g_co.do_pipe ? "pipes" : "rules"); 5451 } 5452 5453 static struct _s_x intcmds[] = { 5454 { "talist", TOK_TALIST }, 5455 { "iflist", TOK_IFLIST }, 5456 { "olist", TOK_OLIST }, 5457 { "vlist", TOK_VLIST }, 5458 { NULL, 0 } 5459 }; 5460 5461 static struct _s_x otypes[] = { 5462 { "EACTION", IPFW_TLV_EACTION }, 5463 { "DYNSTATE", IPFW_TLV_STATE_NAME }, 5464 { NULL, 0 } 5465 }; 5466 5467 static const char* 5468 lookup_eaction_name(ipfw_obj_ntlv *ntlv, int cnt, uint16_t type) 5469 { 5470 const char *name; 5471 int i; 5472 5473 name = NULL; 5474 for (i = 0; i < cnt; i++) { 5475 if (ntlv[i].head.type != IPFW_TLV_EACTION) 5476 continue; 5477 if (IPFW_TLV_EACTION_NAME(ntlv[i].idx) != type) 5478 continue; 5479 name = ntlv[i].name; 5480 break; 5481 } 5482 return (name); 5483 } 5484 5485 static void 5486 ipfw_list_objects(int ac __unused, char *av[] __unused) 5487 { 5488 ipfw_obj_lheader req, *olh; 5489 ipfw_obj_ntlv *ntlv; 5490 const char *name; 5491 size_t sz; 5492 uint32_t i; 5493 5494 memset(&req, 0, sizeof(req)); 5495 sz = sizeof(req); 5496 if (do_get3(IP_FW_DUMP_SRVOBJECTS, &req.opheader, &sz) != 0) 5497 if (errno != ENOMEM) 5498 return; 5499 5500 sz = req.size; 5501 if ((olh = calloc(1, sz)) == NULL) 5502 return; 5503 5504 olh->size = sz; 5505 if (do_get3(IP_FW_DUMP_SRVOBJECTS, &olh->opheader, &sz) != 0) { 5506 free(olh); 5507 return; 5508 } 5509 5510 if (olh->count > 0) 5511 printf("Objects list:\n"); 5512 else 5513 printf("There are no objects\n"); 5514 ntlv = (ipfw_obj_ntlv *)(olh + 1); 5515 for (i = 0; i < olh->count; i++) { 5516 name = match_value(otypes, ntlv->head.type); 5517 if (name == NULL) 5518 name = lookup_eaction_name( 5519 (ipfw_obj_ntlv *)(olh + 1), olh->count, 5520 ntlv->head.type); 5521 if (name == NULL) 5522 printf(" kidx: %4d\ttype: %10d\tname: %s\n", 5523 ntlv->idx, ntlv->head.type, ntlv->name); 5524 else 5525 printf(" kidx: %4d\ttype: %10s\tname: %s\n", 5526 ntlv->idx, name, ntlv->name); 5527 ntlv++; 5528 } 5529 free(olh); 5530 } 5531 5532 void 5533 ipfw_internal_handler(int ac, char *av[]) 5534 { 5535 int tcmd; 5536 5537 ac--; av++; 5538 NEED1("internal cmd required"); 5539 5540 if ((tcmd = match_token(intcmds, *av)) == -1) 5541 errx(EX_USAGE, "invalid internal sub-cmd: %s", *av); 5542 5543 switch (tcmd) { 5544 case TOK_IFLIST: 5545 ipfw_list_tifaces(); 5546 break; 5547 case TOK_TALIST: 5548 ipfw_list_ta(ac, av); 5549 break; 5550 case TOK_OLIST: 5551 ipfw_list_objects(ac, av); 5552 break; 5553 case TOK_VLIST: 5554 ipfw_list_values(ac, av); 5555 break; 5556 } 5557 } 5558 5559 static int 5560 ipfw_get_tracked_ifaces(ipfw_obj_lheader **polh) 5561 { 5562 ipfw_obj_lheader req, *olh; 5563 size_t sz; 5564 5565 memset(&req, 0, sizeof(req)); 5566 sz = sizeof(req); 5567 5568 if (do_get3(IP_FW_XIFLIST, &req.opheader, &sz) != 0) { 5569 if (errno != ENOMEM) 5570 return (errno); 5571 } 5572 5573 sz = req.size; 5574 if ((olh = calloc(1, sz)) == NULL) 5575 return (ENOMEM); 5576 5577 olh->size = sz; 5578 if (do_get3(IP_FW_XIFLIST, &olh->opheader, &sz) != 0) { 5579 free(olh); 5580 return (errno); 5581 } 5582 5583 *polh = olh; 5584 return (0); 5585 } 5586 5587 static int 5588 ifinfo_cmp(const void *a, const void *b) 5589 { 5590 const ipfw_iface_info *ia, *ib; 5591 5592 ia = (const ipfw_iface_info *)a; 5593 ib = (const ipfw_iface_info *)b; 5594 5595 return (stringnum_cmp(ia->ifname, ib->ifname)); 5596 } 5597 5598 /* 5599 * Retrieves table list from kernel, 5600 * optionally sorts it and calls requested function for each table. 5601 * Returns 0 on success. 5602 */ 5603 static void 5604 ipfw_list_tifaces(void) 5605 { 5606 ipfw_obj_lheader *olh = NULL; 5607 ipfw_iface_info *info; 5608 uint32_t i; 5609 int error; 5610 5611 if ((error = ipfw_get_tracked_ifaces(&olh)) != 0) 5612 err(EX_OSERR, "Unable to request ipfw tracked interface list"); 5613 5614 qsort(olh + 1, olh->count, olh->objsize, ifinfo_cmp); 5615 5616 info = (ipfw_iface_info *)(olh + 1); 5617 for (i = 0; i < olh->count; i++) { 5618 if (info->flags & IPFW_IFFLAG_RESOLVED) 5619 printf("%s ifindex: %d refcount: %u changes: %u\n", 5620 info->ifname, info->ifindex, info->refcnt, 5621 info->gencnt); 5622 else 5623 printf("%s ifindex: unresolved refcount: %u changes: %u\n", 5624 info->ifname, info->refcnt, info->gencnt); 5625 info = (ipfw_iface_info *)((caddr_t)info + olh->objsize); 5626 } 5627 5628 free(olh); 5629 } 5630