1 /*- 2 * Copyright (c) 2002-2003 Luigi Rizzo 3 * Copyright (c) 1996 Alex Nash, Paul Traina, Poul-Henning Kamp 4 * Copyright (c) 1994 Ugen J.S.Antsilevich 5 * 6 * Idea and grammar partially left from: 7 * Copyright (c) 1993 Daniel Boulet 8 * 9 * Redistribution and use in source forms, with and without modification, 10 * are permitted provided that this entire comment appears intact. 11 * 12 * Redistribution in binary form may occur without any restrictions. 13 * Obviously, it would be nice if you gave credit where credit is due 14 * but requiring it would be too onerous. 15 * 16 * This software is provided ``AS IS'' without any warranties of any kind. 17 * 18 * NEW command line interface for IP firewall facility 19 * 20 * $FreeBSD$ 21 */ 22 23 #include <sys/types.h> 24 #include <sys/param.h> 25 #include <sys/socket.h> 26 #include <sys/sockio.h> 27 #include <sys/sysctl.h> 28 29 #include "ipfw2.h" 30 31 #include <ctype.h> 32 #include <err.h> 33 #include <errno.h> 34 #include <grp.h> 35 #include <jail.h> 36 #include <netdb.h> 37 #include <pwd.h> 38 #include <stdio.h> 39 #include <stdarg.h> 40 #include <stdint.h> 41 #include <stdlib.h> 42 #include <string.h> 43 #include <sysexits.h> 44 #include <time.h> /* ctime */ 45 #include <timeconv.h> /* _long_to_time */ 46 #include <unistd.h> 47 #include <fcntl.h> 48 #include <stddef.h> /* offsetof */ 49 50 #include <net/ethernet.h> 51 #include <net/if.h> /* only IFNAMSIZ */ 52 #include <netinet/in.h> 53 #include <netinet/in_systm.h> /* only n_short, n_long */ 54 #include <netinet/ip.h> 55 #include <netinet/ip_icmp.h> 56 #include <netinet/ip_fw.h> 57 #include <netinet/tcp.h> 58 #include <arpa/inet.h> 59 60 struct cmdline_opts g_co; /* global options */ 61 62 struct format_opts { 63 int bcwidth; 64 int pcwidth; 65 int show_counters; 66 int show_time; /* show timestamp */ 67 uint32_t set_mask; /* enabled sets mask */ 68 uint32_t flags; /* request flags */ 69 uint32_t first; /* first rule to request */ 70 uint32_t last; /* last rule to request */ 71 uint32_t dcnt; /* number of dynamic states */ 72 ipfw_obj_ctlv *tstate; /* table state data */ 73 }; 74 75 int resvd_set_number = RESVD_SET; 76 77 static int ipfw_socket = -1; 78 79 #define CHECK_LENGTH(v, len) do { \ 80 if ((v) < (len)) \ 81 errx(EX_DATAERR, "Rule too long"); \ 82 } while (0) 83 /* 84 * Check if we have enough space in cmd buffer. Note that since 85 * first 8? u32 words are reserved by reserved header, full cmd 86 * buffer can't be used, so we need to protect from buffer overrun 87 * only. At the beginning, cblen is less than actual buffer size by 88 * size of ipfw_insn_u32 instruction + 1 u32 work. This eliminates need 89 * for checking small instructions fitting in given range. 90 * We also (ab)use the fact that ipfw_insn is always the first field 91 * for any custom instruction. 92 */ 93 #define CHECK_CMDLEN CHECK_LENGTH(cblen, F_LEN((ipfw_insn *)cmd)) 94 95 #define GET_UINT_ARG(arg, min, max, tok, s_x) do { \ 96 if (!av[0]) \ 97 errx(EX_USAGE, "%s: missing argument", match_value(s_x, tok)); \ 98 if (_substrcmp(*av, "tablearg") == 0) { \ 99 arg = IP_FW_TARG; \ 100 break; \ 101 } \ 102 \ 103 { \ 104 long _xval; \ 105 char *end; \ 106 \ 107 _xval = strtol(*av, &end, 10); \ 108 \ 109 if (!isdigit(**av) || *end != '\0' || (_xval == 0 && errno == EINVAL)) \ 110 errx(EX_DATAERR, "%s: invalid argument: %s", \ 111 match_value(s_x, tok), *av); \ 112 \ 113 if (errno == ERANGE || _xval < min || _xval > max) \ 114 errx(EX_DATAERR, "%s: argument is out of range (%u..%u): %s", \ 115 match_value(s_x, tok), min, max, *av); \ 116 \ 117 if (_xval == IP_FW_TARG) \ 118 errx(EX_DATAERR, "%s: illegal argument value: %s", \ 119 match_value(s_x, tok), *av); \ 120 arg = _xval; \ 121 } \ 122 } while (0) 123 124 static struct _s_x f_tcpflags[] = { 125 { "syn", TH_SYN }, 126 { "fin", TH_FIN }, 127 { "ack", TH_ACK }, 128 { "psh", TH_PUSH }, 129 { "rst", TH_RST }, 130 { "urg", TH_URG }, 131 { "tcp flag", 0 }, 132 { NULL, 0 } 133 }; 134 135 static struct _s_x f_tcpopts[] = { 136 { "mss", IP_FW_TCPOPT_MSS }, 137 { "maxseg", IP_FW_TCPOPT_MSS }, 138 { "window", IP_FW_TCPOPT_WINDOW }, 139 { "sack", IP_FW_TCPOPT_SACK }, 140 { "ts", IP_FW_TCPOPT_TS }, 141 { "timestamp", IP_FW_TCPOPT_TS }, 142 { "cc", IP_FW_TCPOPT_CC }, 143 { "tcp option", 0 }, 144 { NULL, 0 } 145 }; 146 147 /* 148 * IP options span the range 0 to 255 so we need to remap them 149 * (though in fact only the low 5 bits are significant). 150 */ 151 static struct _s_x f_ipopts[] = { 152 { "ssrr", IP_FW_IPOPT_SSRR}, 153 { "lsrr", IP_FW_IPOPT_LSRR}, 154 { "rr", IP_FW_IPOPT_RR}, 155 { "ts", IP_FW_IPOPT_TS}, 156 { "ip option", 0 }, 157 { NULL, 0 } 158 }; 159 160 static struct _s_x f_iptos[] = { 161 { "lowdelay", IPTOS_LOWDELAY}, 162 { "throughput", IPTOS_THROUGHPUT}, 163 { "reliability", IPTOS_RELIABILITY}, 164 { "mincost", IPTOS_MINCOST}, 165 { "congestion", IPTOS_ECN_CE}, 166 { "ecntransport", IPTOS_ECN_ECT0}, 167 { "ip tos option", 0}, 168 { NULL, 0 } 169 }; 170 171 static struct _s_x f_ipoff[] = { 172 { "rf", IP_RF >> 8 }, 173 { "df", IP_DF >> 8 }, 174 { "mf", IP_MF >> 8 }, 175 { "offset", 0x1 }, 176 { NULL, 0} 177 }; 178 179 struct _s_x f_ipdscp[] = { 180 { "af11", IPTOS_DSCP_AF11 >> 2 }, /* 001010 */ 181 { "af12", IPTOS_DSCP_AF12 >> 2 }, /* 001100 */ 182 { "af13", IPTOS_DSCP_AF13 >> 2 }, /* 001110 */ 183 { "af21", IPTOS_DSCP_AF21 >> 2 }, /* 010010 */ 184 { "af22", IPTOS_DSCP_AF22 >> 2 }, /* 010100 */ 185 { "af23", IPTOS_DSCP_AF23 >> 2 }, /* 010110 */ 186 { "af31", IPTOS_DSCP_AF31 >> 2 }, /* 011010 */ 187 { "af32", IPTOS_DSCP_AF32 >> 2 }, /* 011100 */ 188 { "af33", IPTOS_DSCP_AF33 >> 2 }, /* 011110 */ 189 { "af41", IPTOS_DSCP_AF41 >> 2 }, /* 100010 */ 190 { "af42", IPTOS_DSCP_AF42 >> 2 }, /* 100100 */ 191 { "af43", IPTOS_DSCP_AF43 >> 2 }, /* 100110 */ 192 { "be", IPTOS_DSCP_CS0 >> 2 }, /* 000000 */ 193 { "ef", IPTOS_DSCP_EF >> 2 }, /* 101110 */ 194 { "cs0", IPTOS_DSCP_CS0 >> 2 }, /* 000000 */ 195 { "cs1", IPTOS_DSCP_CS1 >> 2 }, /* 001000 */ 196 { "cs2", IPTOS_DSCP_CS2 >> 2 }, /* 010000 */ 197 { "cs3", IPTOS_DSCP_CS3 >> 2 }, /* 011000 */ 198 { "cs4", IPTOS_DSCP_CS4 >> 2 }, /* 100000 */ 199 { "cs5", IPTOS_DSCP_CS5 >> 2 }, /* 101000 */ 200 { "cs6", IPTOS_DSCP_CS6 >> 2 }, /* 110000 */ 201 { "cs7", IPTOS_DSCP_CS7 >> 2 }, /* 100000 */ 202 { NULL, 0 } 203 }; 204 205 static struct _s_x limit_masks[] = { 206 {"all", DYN_SRC_ADDR|DYN_SRC_PORT|DYN_DST_ADDR|DYN_DST_PORT}, 207 {"src-addr", DYN_SRC_ADDR}, 208 {"src-port", DYN_SRC_PORT}, 209 {"dst-addr", DYN_DST_ADDR}, 210 {"dst-port", DYN_DST_PORT}, 211 {NULL, 0} 212 }; 213 214 /* 215 * we use IPPROTO_ETHERTYPE as a fake protocol id to call the print routines 216 * This is only used in this code. 217 */ 218 #define IPPROTO_ETHERTYPE 0x1000 219 static struct _s_x ether_types[] = { 220 /* 221 * Note, we cannot use "-:&/" in the names because they are field 222 * separators in the type specifications. Also, we use s = NULL as 223 * end-delimiter, because a type of 0 can be legal. 224 */ 225 { "ip", 0x0800 }, 226 { "ipv4", 0x0800 }, 227 { "ipv6", 0x86dd }, 228 { "arp", 0x0806 }, 229 { "rarp", 0x8035 }, 230 { "vlan", 0x8100 }, 231 { "loop", 0x9000 }, 232 { "trail", 0x1000 }, 233 { "at", 0x809b }, 234 { "atalk", 0x809b }, 235 { "aarp", 0x80f3 }, 236 { "pppoe_disc", 0x8863 }, 237 { "pppoe_sess", 0x8864 }, 238 { "ipx_8022", 0x00E0 }, 239 { "ipx_8023", 0x0000 }, 240 { "ipx_ii", 0x8137 }, 241 { "ipx_snap", 0x8137 }, 242 { "ipx", 0x8137 }, 243 { "ns", 0x0600 }, 244 { NULL, 0 } 245 }; 246 247 static struct _s_x rule_eactions[] = { 248 { "nat64clat", TOK_NAT64CLAT }, 249 { "nat64lsn", TOK_NAT64LSN }, 250 { "nat64stl", TOK_NAT64STL }, 251 { "nptv6", TOK_NPTV6 }, 252 { "tcp-setmss", TOK_TCPSETMSS }, 253 { NULL, 0 } /* terminator */ 254 }; 255 256 static struct _s_x rule_actions[] = { 257 { "abort6", TOK_ABORT6 }, 258 { "abort", TOK_ABORT }, 259 { "accept", TOK_ACCEPT }, 260 { "pass", TOK_ACCEPT }, 261 { "allow", TOK_ACCEPT }, 262 { "permit", TOK_ACCEPT }, 263 { "count", TOK_COUNT }, 264 { "pipe", TOK_PIPE }, 265 { "queue", TOK_QUEUE }, 266 { "divert", TOK_DIVERT }, 267 { "tee", TOK_TEE }, 268 { "netgraph", TOK_NETGRAPH }, 269 { "ngtee", TOK_NGTEE }, 270 { "fwd", TOK_FORWARD }, 271 { "forward", TOK_FORWARD }, 272 { "skipto", TOK_SKIPTO }, 273 { "deny", TOK_DENY }, 274 { "drop", TOK_DENY }, 275 { "reject", TOK_REJECT }, 276 { "reset6", TOK_RESET6 }, 277 { "reset", TOK_RESET }, 278 { "unreach6", TOK_UNREACH6 }, 279 { "unreach", TOK_UNREACH }, 280 { "check-state", TOK_CHECKSTATE }, 281 { "//", TOK_COMMENT }, 282 { "nat", TOK_NAT }, 283 { "reass", TOK_REASS }, 284 { "setfib", TOK_SETFIB }, 285 { "setdscp", TOK_SETDSCP }, 286 { "call", TOK_CALL }, 287 { "return", TOK_RETURN }, 288 { "eaction", TOK_EACTION }, 289 { "tcp-setmss", TOK_TCPSETMSS }, 290 { NULL, 0 } /* terminator */ 291 }; 292 293 static struct _s_x rule_action_params[] = { 294 { "altq", TOK_ALTQ }, 295 { "log", TOK_LOG }, 296 { "tag", TOK_TAG }, 297 { "untag", TOK_UNTAG }, 298 { NULL, 0 } /* terminator */ 299 }; 300 301 /* 302 * The 'lookup' instruction accepts one of the following arguments. 303 * -1 is a terminator for the list. 304 * Arguments are passed as v[1] in O_DST_LOOKUP options. 305 */ 306 static int lookup_key[] = { 307 TOK_DSTIP, TOK_SRCIP, TOK_DSTPORT, TOK_SRCPORT, 308 TOK_UID, TOK_JAIL, TOK_DSCP, -1 }; 309 310 static struct _s_x rule_options[] = { 311 { "tagged", TOK_TAGGED }, 312 { "uid", TOK_UID }, 313 { "gid", TOK_GID }, 314 { "jail", TOK_JAIL }, 315 { "in", TOK_IN }, 316 { "limit", TOK_LIMIT }, 317 { "set-limit", TOK_SETLIMIT }, 318 { "keep-state", TOK_KEEPSTATE }, 319 { "record-state", TOK_RECORDSTATE }, 320 { "bridged", TOK_LAYER2 }, 321 { "layer2", TOK_LAYER2 }, 322 { "out", TOK_OUT }, 323 { "diverted", TOK_DIVERTED }, 324 { "diverted-loopback", TOK_DIVERTEDLOOPBACK }, 325 { "diverted-output", TOK_DIVERTEDOUTPUT }, 326 { "xmit", TOK_XMIT }, 327 { "recv", TOK_RECV }, 328 { "via", TOK_VIA }, 329 { "fragment", TOK_FRAG }, 330 { "frag", TOK_FRAG }, 331 { "fib", TOK_FIB }, 332 { "ipoptions", TOK_IPOPTS }, 333 { "ipopts", TOK_IPOPTS }, 334 { "iplen", TOK_IPLEN }, 335 { "ipid", TOK_IPID }, 336 { "ipprecedence", TOK_IPPRECEDENCE }, 337 { "dscp", TOK_DSCP }, 338 { "iptos", TOK_IPTOS }, 339 { "ipttl", TOK_IPTTL }, 340 { "ipversion", TOK_IPVER }, 341 { "ipver", TOK_IPVER }, 342 { "estab", TOK_ESTAB }, 343 { "established", TOK_ESTAB }, 344 { "setup", TOK_SETUP }, 345 { "sockarg", TOK_SOCKARG }, 346 { "tcpdatalen", TOK_TCPDATALEN }, 347 { "tcpflags", TOK_TCPFLAGS }, 348 { "tcpflgs", TOK_TCPFLAGS }, 349 { "tcpmss", TOK_TCPMSS }, 350 { "tcpoptions", TOK_TCPOPTS }, 351 { "tcpopts", TOK_TCPOPTS }, 352 { "tcpseq", TOK_TCPSEQ }, 353 { "tcpack", TOK_TCPACK }, 354 { "tcpwin", TOK_TCPWIN }, 355 { "icmptype", TOK_ICMPTYPES }, 356 { "icmptypes", TOK_ICMPTYPES }, 357 { "dst-ip", TOK_DSTIP }, 358 { "src-ip", TOK_SRCIP }, 359 { "dst-port", TOK_DSTPORT }, 360 { "src-port", TOK_SRCPORT }, 361 { "proto", TOK_PROTO }, 362 { "MAC", TOK_MAC }, 363 { "mac", TOK_MAC }, 364 { "mac-type", TOK_MACTYPE }, 365 { "verrevpath", TOK_VERREVPATH }, 366 { "versrcreach", TOK_VERSRCREACH }, 367 { "antispoof", TOK_ANTISPOOF }, 368 { "ipsec", TOK_IPSEC }, 369 { "icmp6type", TOK_ICMP6TYPES }, 370 { "icmp6types", TOK_ICMP6TYPES }, 371 { "ext6hdr", TOK_EXT6HDR}, 372 { "flow-id", TOK_FLOWID}, 373 { "ipv6", TOK_IPV6}, 374 { "ip6", TOK_IPV6}, 375 { "ipv4", TOK_IPV4}, 376 { "ip4", TOK_IPV4}, 377 { "dst-ipv6", TOK_DSTIP6}, 378 { "dst-ip6", TOK_DSTIP6}, 379 { "src-ipv6", TOK_SRCIP6}, 380 { "src-ip6", TOK_SRCIP6}, 381 { "lookup", TOK_LOOKUP}, 382 { "flow", TOK_FLOW}, 383 { "defer-action", TOK_SKIPACTION }, 384 { "defer-immediate-action", TOK_SKIPACTION }, 385 { "//", TOK_COMMENT }, 386 387 { "not", TOK_NOT }, /* pseudo option */ 388 { "!", /* escape ? */ TOK_NOT }, /* pseudo option */ 389 { "or", TOK_OR }, /* pseudo option */ 390 { "|", /* escape */ TOK_OR }, /* pseudo option */ 391 { "{", TOK_STARTBRACE }, /* pseudo option */ 392 { "(", TOK_STARTBRACE }, /* pseudo option */ 393 { "}", TOK_ENDBRACE }, /* pseudo option */ 394 { ")", TOK_ENDBRACE }, /* pseudo option */ 395 { NULL, 0 } /* terminator */ 396 }; 397 398 void bprint_uint_arg(struct buf_pr *bp, const char *str, uint32_t arg); 399 static int ipfw_get_config(struct cmdline_opts *co, struct format_opts *fo, 400 ipfw_cfg_lheader **pcfg, size_t *psize); 401 static int ipfw_show_config(struct cmdline_opts *co, struct format_opts *fo, 402 ipfw_cfg_lheader *cfg, size_t sz, int ac, char **av); 403 static void ipfw_list_tifaces(void); 404 405 struct tidx; 406 static uint16_t pack_object(struct tidx *tstate, const char *name, int otype); 407 static uint16_t pack_table(struct tidx *tstate, const char *name); 408 409 static char *table_search_ctlv(ipfw_obj_ctlv *ctlv, uint16_t idx); 410 static void object_sort_ctlv(ipfw_obj_ctlv *ctlv); 411 static char *object_search_ctlv(ipfw_obj_ctlv *ctlv, uint16_t idx, 412 uint16_t type); 413 414 int 415 is_ipfw(void) 416 { 417 return (g_co.prog == cmdline_prog_ipfw); 418 } 419 420 /* 421 * Simple string buffer API. 422 * Used to simplify buffer passing between function and for 423 * transparent overrun handling. 424 */ 425 426 /* 427 * Allocates new buffer of given size @sz. 428 * 429 * Returns 0 on success. 430 */ 431 int 432 bp_alloc(struct buf_pr *b, size_t size) 433 { 434 memset(b, 0, sizeof(struct buf_pr)); 435 436 if ((b->buf = calloc(1, size)) == NULL) 437 return (ENOMEM); 438 439 b->ptr = b->buf; 440 b->size = size; 441 b->avail = b->size; 442 443 return (0); 444 } 445 446 void 447 bp_free(struct buf_pr *b) 448 { 449 450 free(b->buf); 451 } 452 453 /* 454 * Flushes buffer so new writer start from beginning. 455 */ 456 void 457 bp_flush(struct buf_pr *b) 458 { 459 460 b->ptr = b->buf; 461 b->avail = b->size; 462 b->buf[0] = '\0'; 463 } 464 465 /* 466 * Print message specified by @format and args. 467 * Automatically manage buffer space and transparently handle 468 * buffer overruns. 469 * 470 * Returns number of bytes that should have been printed. 471 */ 472 int 473 bprintf(struct buf_pr *b, const char *format, ...) 474 { 475 va_list args; 476 int i; 477 478 va_start(args, format); 479 480 i = vsnprintf(b->ptr, b->avail, format, args); 481 va_end(args); 482 483 if (i < 0 || (size_t)i > b->avail) { 484 /* Overflow or print error */ 485 b->avail = 0; 486 } else { 487 b->ptr += i; 488 b->avail -= i; 489 } 490 491 b->needed += i; 492 493 return (i); 494 } 495 496 /* 497 * Special values printer for tablearg-aware opcodes. 498 */ 499 void 500 bprint_uint_arg(struct buf_pr *bp, const char *str, uint32_t arg) 501 { 502 503 if (str != NULL) 504 bprintf(bp, "%s", str); 505 if (arg == IP_FW_TARG) 506 bprintf(bp, "tablearg"); 507 else 508 bprintf(bp, "%u", arg); 509 } 510 511 /* 512 * Helper routine to print a possibly unaligned uint64_t on 513 * various platform. If width > 0, print the value with 514 * the desired width, followed by a space; 515 * otherwise, return the required width. 516 */ 517 int 518 pr_u64(struct buf_pr *b, void *pd, int width) 519 { 520 #ifdef TCC 521 #define U64_FMT "I64" 522 #else 523 #define U64_FMT "llu" 524 #endif 525 uint64_t u; 526 unsigned long long d; 527 528 bcopy (pd, &u, sizeof(u)); 529 d = u; 530 return (width > 0) ? 531 bprintf(b, "%*" U64_FMT " ", width, d) : 532 snprintf(NULL, 0, "%" U64_FMT, d) ; 533 #undef U64_FMT 534 } 535 536 537 void * 538 safe_calloc(size_t number, size_t size) 539 { 540 void *ret = calloc(number, size); 541 542 if (ret == NULL) 543 err(EX_OSERR, "calloc"); 544 return ret; 545 } 546 547 void * 548 safe_realloc(void *ptr, size_t size) 549 { 550 void *ret = realloc(ptr, size); 551 552 if (ret == NULL) 553 err(EX_OSERR, "realloc"); 554 return ret; 555 } 556 557 /* 558 * Compare things like interface or table names. 559 */ 560 int 561 stringnum_cmp(const char *a, const char *b) 562 { 563 int la, lb; 564 565 la = strlen(a); 566 lb = strlen(b); 567 568 if (la > lb) 569 return (1); 570 else if (la < lb) 571 return (-01); 572 573 return (strcmp(a, b)); 574 } 575 576 577 /* 578 * conditionally runs the command. 579 * Selected options or negative -> getsockopt 580 */ 581 int 582 do_cmd(int optname, void *optval, uintptr_t optlen) 583 { 584 int i; 585 586 if (g_co.test_only) 587 return 0; 588 589 if (ipfw_socket == -1) 590 ipfw_socket = socket(AF_INET, SOCK_RAW, IPPROTO_RAW); 591 if (ipfw_socket < 0) 592 err(EX_UNAVAILABLE, "socket"); 593 594 if (optname == IP_FW_GET || optname == IP_DUMMYNET_GET || 595 optname == IP_FW_ADD || optname == IP_FW3 || 596 optname == IP_FW_NAT_GET_CONFIG || 597 optname < 0 || 598 optname == IP_FW_NAT_GET_LOG) { 599 if (optname < 0) 600 optname = -optname; 601 i = getsockopt(ipfw_socket, IPPROTO_IP, optname, optval, 602 (socklen_t *)optlen); 603 } else { 604 i = setsockopt(ipfw_socket, IPPROTO_IP, optname, optval, optlen); 605 } 606 return i; 607 } 608 609 /* 610 * do_set3 - pass ipfw control cmd to kernel 611 * @optname: option name 612 * @optval: pointer to option data 613 * @optlen: option length 614 * 615 * Assumes op3 header is already embedded. 616 * Calls setsockopt() with IP_FW3 as kernel-visible opcode. 617 * Returns 0 on success or errno otherwise. 618 */ 619 int 620 do_set3(int optname, ip_fw3_opheader *op3, size_t optlen) 621 { 622 623 if (g_co.test_only) 624 return (0); 625 626 if (ipfw_socket == -1) 627 ipfw_socket = socket(AF_INET, SOCK_RAW, IPPROTO_RAW); 628 if (ipfw_socket < 0) 629 err(EX_UNAVAILABLE, "socket"); 630 631 op3->opcode = optname; 632 633 return (setsockopt(ipfw_socket, IPPROTO_IP, IP_FW3, op3, optlen)); 634 } 635 636 /* 637 * do_get3 - pass ipfw control cmd to kernel 638 * @optname: option name 639 * @optval: pointer to option data 640 * @optlen: pointer to option length 641 * 642 * Assumes op3 header is already embedded. 643 * Calls getsockopt() with IP_FW3 as kernel-visible opcode. 644 * Returns 0 on success or errno otherwise. 645 */ 646 int 647 do_get3(int optname, ip_fw3_opheader *op3, size_t *optlen) 648 { 649 int error; 650 socklen_t len; 651 652 if (g_co.test_only) 653 return (0); 654 655 if (ipfw_socket == -1) 656 ipfw_socket = socket(AF_INET, SOCK_RAW, IPPROTO_RAW); 657 if (ipfw_socket < 0) 658 err(EX_UNAVAILABLE, "socket"); 659 660 op3->opcode = optname; 661 662 len = *optlen; 663 error = getsockopt(ipfw_socket, IPPROTO_IP, IP_FW3, op3, &len); 664 *optlen = len; 665 666 return (error); 667 } 668 669 /** 670 * match_token takes a table and a string, returns the value associated 671 * with the string (-1 in case of failure). 672 */ 673 int 674 match_token(struct _s_x *table, const char *string) 675 { 676 struct _s_x *pt; 677 uint i = strlen(string); 678 679 for (pt = table ; i && pt->s != NULL ; pt++) 680 if (strlen(pt->s) == i && !bcmp(string, pt->s, i)) 681 return pt->x; 682 return (-1); 683 } 684 685 /** 686 * match_token_relaxed takes a table and a string, returns the value associated 687 * with the string for the best match. 688 * 689 * Returns: 690 * value from @table for matched records 691 * -1 for non-matched records 692 * -2 if more than one records match @string. 693 */ 694 int 695 match_token_relaxed(struct _s_x *table, const char *string) 696 { 697 struct _s_x *pt, *m; 698 int i, c; 699 700 i = strlen(string); 701 c = 0; 702 703 for (pt = table ; i != 0 && pt->s != NULL ; pt++) { 704 if (strncmp(pt->s, string, i) != 0) 705 continue; 706 m = pt; 707 c++; 708 } 709 710 if (c == 1) 711 return (m->x); 712 713 return (c > 0 ? -2: -1); 714 } 715 716 int 717 get_token(struct _s_x *table, const char *string, const char *errbase) 718 { 719 int tcmd; 720 721 if ((tcmd = match_token_relaxed(table, string)) < 0) 722 errx(EX_USAGE, "%s %s %s", 723 (tcmd == 0) ? "invalid" : "ambiguous", errbase, string); 724 725 return (tcmd); 726 } 727 728 /** 729 * match_value takes a table and a value, returns the string associated 730 * with the value (NULL in case of failure). 731 */ 732 char const * 733 match_value(struct _s_x *p, int value) 734 { 735 for (; p->s != NULL; p++) 736 if (p->x == value) 737 return p->s; 738 return NULL; 739 } 740 741 size_t 742 concat_tokens(char *buf, size_t bufsize, struct _s_x *table, 743 const char *delimiter) 744 { 745 struct _s_x *pt; 746 int l; 747 size_t sz; 748 749 for (sz = 0, pt = table ; pt->s != NULL; pt++) { 750 l = snprintf(buf + sz, bufsize - sz, "%s%s", 751 (sz == 0) ? "" : delimiter, pt->s); 752 sz += l; 753 bufsize += l; 754 if (sz > bufsize) 755 return (bufsize); 756 } 757 758 return (sz); 759 } 760 761 /* 762 * helper function to process a set of flags and set bits in the 763 * appropriate masks. 764 */ 765 int 766 fill_flags(struct _s_x *flags, char *p, char **e, uint32_t *set, 767 uint32_t *clear) 768 { 769 char *q; /* points to the separator */ 770 int val; 771 uint32_t *which; /* mask we are working on */ 772 773 while (p && *p) { 774 if (*p == '!') { 775 p++; 776 which = clear; 777 } else 778 which = set; 779 q = strchr(p, ','); 780 if (q) 781 *q++ = '\0'; 782 val = match_token(flags, p); 783 if (val <= 0) { 784 if (e != NULL) 785 *e = p; 786 return (-1); 787 } 788 *which |= (uint32_t)val; 789 p = q; 790 } 791 return (0); 792 } 793 794 void 795 print_flags_buffer(char *buf, size_t sz, struct _s_x *list, uint32_t set) 796 { 797 char const *comma = ""; 798 int i, l; 799 800 for (i = 0; list[i].x != 0; i++) { 801 if ((set & list[i].x) == 0) 802 continue; 803 804 set &= ~list[i].x; 805 l = snprintf(buf, sz, "%s%s", comma, list[i].s); 806 if (l < 0 || (size_t)l >= sz) 807 return; 808 comma = ","; 809 buf += l; 810 sz -=l; 811 } 812 } 813 814 /* 815 * _substrcmp takes two strings and returns 1 if they do not match, 816 * and 0 if they match exactly or the first string is a sub-string 817 * of the second. A warning is printed to stderr in the case that the 818 * first string is a sub-string of the second. 819 * 820 * This function will be removed in the future through the usual 821 * deprecation process. 822 */ 823 int 824 _substrcmp(const char *str1, const char* str2) 825 { 826 827 if (strncmp(str1, str2, strlen(str1)) != 0) 828 return 1; 829 830 if (strlen(str1) != strlen(str2)) 831 warnx("DEPRECATED: '%s' matched '%s' as a sub-string", 832 str1, str2); 833 return 0; 834 } 835 836 /* 837 * _substrcmp2 takes three strings and returns 1 if the first two do not match, 838 * and 0 if they match exactly or the second string is a sub-string 839 * of the first. A warning is printed to stderr in the case that the 840 * first string does not match the third. 841 * 842 * This function exists to warn about the bizarre construction 843 * strncmp(str, "by", 2) which is used to allow people to use a shortcut 844 * for "bytes". The problem is that in addition to accepting "by", 845 * "byt", "byte", and "bytes", it also excepts "by_rabid_dogs" and any 846 * other string beginning with "by". 847 * 848 * This function will be removed in the future through the usual 849 * deprecation process. 850 */ 851 int 852 _substrcmp2(const char *str1, const char* str2, const char* str3) 853 { 854 855 if (strncmp(str1, str2, strlen(str2)) != 0) 856 return 1; 857 858 if (strcmp(str1, str3) != 0) 859 warnx("DEPRECATED: '%s' matched '%s'", 860 str1, str3); 861 return 0; 862 } 863 864 /* 865 * prints one port, symbolic or numeric 866 */ 867 static void 868 print_port(struct buf_pr *bp, int proto, uint16_t port) 869 { 870 871 if (proto == IPPROTO_ETHERTYPE) { 872 char const *s; 873 874 if (g_co.do_resolv && (s = match_value(ether_types, port)) ) 875 bprintf(bp, "%s", s); 876 else 877 bprintf(bp, "0x%04x", port); 878 } else { 879 struct servent *se = NULL; 880 if (g_co.do_resolv) { 881 struct protoent *pe = getprotobynumber(proto); 882 883 se = getservbyport(htons(port), pe ? pe->p_name : NULL); 884 } 885 if (se) 886 bprintf(bp, "%s", se->s_name); 887 else 888 bprintf(bp, "%d", port); 889 } 890 } 891 892 static struct _s_x _port_name[] = { 893 {"dst-port", O_IP_DSTPORT}, 894 {"src-port", O_IP_SRCPORT}, 895 {"ipid", O_IPID}, 896 {"iplen", O_IPLEN}, 897 {"ipttl", O_IPTTL}, 898 {"mac-type", O_MAC_TYPE}, 899 {"tcpdatalen", O_TCPDATALEN}, 900 {"tcpmss", O_TCPMSS}, 901 {"tcpwin", O_TCPWIN}, 902 {"tagged", O_TAGGED}, 903 {NULL, 0} 904 }; 905 906 /* 907 * Print the values in a list 16-bit items of the types above. 908 * XXX todo: add support for mask. 909 */ 910 static void 911 print_newports(struct buf_pr *bp, const ipfw_insn_u16 *cmd, int proto, int opcode) 912 { 913 const uint16_t *p = cmd->ports; 914 int i; 915 char const *sep; 916 917 if (opcode != 0) { 918 sep = match_value(_port_name, opcode); 919 if (sep == NULL) 920 sep = "???"; 921 bprintf(bp, " %s", sep); 922 } 923 sep = " "; 924 for (i = F_LEN((const ipfw_insn *)cmd) - 1; i > 0; i--, p += 2) { 925 bprintf(bp, "%s", sep); 926 print_port(bp, proto, p[0]); 927 if (p[0] != p[1]) { 928 bprintf(bp, "-"); 929 print_port(bp, proto, p[1]); 930 } 931 sep = ","; 932 } 933 } 934 935 /* 936 * Like strtol, but also translates service names into port numbers 937 * for some protocols. 938 * In particular: 939 * proto == -1 disables the protocol check; 940 * proto == IPPROTO_ETHERTYPE looks up an internal table 941 * proto == <some value in /etc/protocols> matches the values there. 942 * Returns *end == s in case the parameter is not found. 943 */ 944 static int 945 strtoport(char *s, char **end, int base, int proto) 946 { 947 char *p, *buf; 948 char *s1; 949 int i; 950 951 *end = s; /* default - not found */ 952 if (*s == '\0') 953 return 0; /* not found */ 954 955 if (isdigit(*s)) 956 return strtol(s, end, base); 957 958 /* 959 * find separator. '\\' escapes the next char. 960 */ 961 for (s1 = s; *s1 && (isalnum(*s1) || *s1 == '\\' || 962 *s1 == '_' || *s1 == '.') ; s1++) 963 if (*s1 == '\\' && s1[1] != '\0') 964 s1++; 965 966 buf = safe_calloc(s1 - s + 1, 1); 967 968 /* 969 * copy into a buffer skipping backslashes 970 */ 971 for (p = s, i = 0; p != s1 ; p++) 972 if (*p != '\\') 973 buf[i++] = *p; 974 buf[i++] = '\0'; 975 976 if (proto == IPPROTO_ETHERTYPE) { 977 i = match_token(ether_types, buf); 978 free(buf); 979 if (i != -1) { /* found */ 980 *end = s1; 981 return i; 982 } 983 } else { 984 struct protoent *pe = NULL; 985 struct servent *se; 986 987 if (proto != 0) 988 pe = getprotobynumber(proto); 989 setservent(1); 990 se = getservbyname(buf, pe ? pe->p_name : NULL); 991 free(buf); 992 if (se != NULL) { 993 *end = s1; 994 return ntohs(se->s_port); 995 } 996 } 997 return 0; /* not found */ 998 } 999 1000 /* 1001 * Fill the body of the command with the list of port ranges. 1002 */ 1003 static int 1004 fill_newports(ipfw_insn_u16 *cmd, char *av, int proto, int cblen) 1005 { 1006 uint16_t a, b, *p = cmd->ports; 1007 int i = 0; 1008 char *s = av; 1009 1010 while (*s) { 1011 a = strtoport(av, &s, 0, proto); 1012 if (s == av) /* empty or invalid argument */ 1013 return (0); 1014 1015 CHECK_LENGTH(cblen, i + 2); 1016 1017 switch (*s) { 1018 case '-': /* a range */ 1019 av = s + 1; 1020 b = strtoport(av, &s, 0, proto); 1021 /* Reject expressions like '1-abc' or '1-2-3'. */ 1022 if (s == av || (*s != ',' && *s != '\0')) 1023 return (0); 1024 p[0] = a; 1025 p[1] = b; 1026 break; 1027 case ',': /* comma separated list */ 1028 case '\0': 1029 p[0] = p[1] = a; 1030 break; 1031 default: 1032 warnx("port list: invalid separator <%c> in <%s>", 1033 *s, av); 1034 return (0); 1035 } 1036 1037 i++; 1038 p += 2; 1039 av = s + 1; 1040 } 1041 if (i > 0) { 1042 if (i + 1 > F_LEN_MASK) 1043 errx(EX_DATAERR, "too many ports/ranges\n"); 1044 cmd->o.len |= i + 1; /* leave F_NOT and F_OR untouched */ 1045 } 1046 return (i); 1047 } 1048 1049 /* 1050 * Fill the body of the command with the list of DiffServ codepoints. 1051 */ 1052 static void 1053 fill_dscp(ipfw_insn *cmd, char *av, int cblen) 1054 { 1055 uint32_t *low, *high; 1056 char *s = av, *a; 1057 int code; 1058 1059 cmd->opcode = O_DSCP; 1060 cmd->len |= F_INSN_SIZE(ipfw_insn_u32) + 1; 1061 1062 CHECK_CMDLEN; 1063 1064 low = (uint32_t *)(cmd + 1); 1065 high = low + 1; 1066 1067 *low = 0; 1068 *high = 0; 1069 1070 while (s != NULL) { 1071 a = strchr(s, ','); 1072 1073 if (a != NULL) 1074 *a++ = '\0'; 1075 1076 if (isalpha(*s)) { 1077 if ((code = match_token(f_ipdscp, s)) == -1) 1078 errx(EX_DATAERR, "Unknown DSCP code"); 1079 } else { 1080 code = strtoul(s, NULL, 10); 1081 if (code < 0 || code > 63) 1082 errx(EX_DATAERR, "Invalid DSCP value"); 1083 } 1084 1085 if (code >= 32) 1086 *high |= 1 << (code - 32); 1087 else 1088 *low |= 1 << code; 1089 1090 s = a; 1091 } 1092 } 1093 1094 static struct _s_x icmpcodes[] = { 1095 { "net", ICMP_UNREACH_NET }, 1096 { "host", ICMP_UNREACH_HOST }, 1097 { "protocol", ICMP_UNREACH_PROTOCOL }, 1098 { "port", ICMP_UNREACH_PORT }, 1099 { "needfrag", ICMP_UNREACH_NEEDFRAG }, 1100 { "srcfail", ICMP_UNREACH_SRCFAIL }, 1101 { "net-unknown", ICMP_UNREACH_NET_UNKNOWN }, 1102 { "host-unknown", ICMP_UNREACH_HOST_UNKNOWN }, 1103 { "isolated", ICMP_UNREACH_ISOLATED }, 1104 { "net-prohib", ICMP_UNREACH_NET_PROHIB }, 1105 { "host-prohib", ICMP_UNREACH_HOST_PROHIB }, 1106 { "tosnet", ICMP_UNREACH_TOSNET }, 1107 { "toshost", ICMP_UNREACH_TOSHOST }, 1108 { "filter-prohib", ICMP_UNREACH_FILTER_PROHIB }, 1109 { "host-precedence", ICMP_UNREACH_HOST_PRECEDENCE }, 1110 { "precedence-cutoff", ICMP_UNREACH_PRECEDENCE_CUTOFF }, 1111 { NULL, 0 } 1112 }; 1113 1114 static void 1115 fill_reject_code(u_short *codep, char *str) 1116 { 1117 int val; 1118 char *s; 1119 1120 val = strtoul(str, &s, 0); 1121 if (s == str || *s != '\0' || val >= 0x100) 1122 val = match_token(icmpcodes, str); 1123 if (val < 0) 1124 errx(EX_DATAERR, "unknown ICMP unreachable code ``%s''", str); 1125 *codep = val; 1126 return; 1127 } 1128 1129 static void 1130 print_reject_code(struct buf_pr *bp, uint16_t code) 1131 { 1132 char const *s; 1133 1134 if ((s = match_value(icmpcodes, code)) != NULL) 1135 bprintf(bp, "unreach %s", s); 1136 else 1137 bprintf(bp, "unreach %u", code); 1138 } 1139 1140 /* 1141 * Returns the number of bits set (from left) in a contiguous bitmask, 1142 * or -1 if the mask is not contiguous. 1143 * XXX this needs a proper fix. 1144 * This effectively works on masks in big-endian (network) format. 1145 * when compiled on little endian architectures. 1146 * 1147 * First bit is bit 7 of the first byte -- note, for MAC addresses, 1148 * the first bit on the wire is bit 0 of the first byte. 1149 * len is the max length in bits. 1150 */ 1151 int 1152 contigmask(const uint8_t *p, int len) 1153 { 1154 int i, n; 1155 1156 for (i=0; i<len ; i++) 1157 if ( (p[i/8] & (1 << (7 - (i%8)))) == 0) /* first bit unset */ 1158 break; 1159 for (n=i+1; n < len; n++) 1160 if ( (p[n/8] & (1 << (7 - (n%8)))) != 0) 1161 return -1; /* mask not contiguous */ 1162 return i; 1163 } 1164 1165 /* 1166 * print flags set/clear in the two bitmasks passed as parameters. 1167 * There is a specialized check for f_tcpflags. 1168 */ 1169 static void 1170 print_flags(struct buf_pr *bp, char const *name, const ipfw_insn *cmd, 1171 struct _s_x *list) 1172 { 1173 char const *comma = ""; 1174 int i; 1175 uint8_t set = cmd->arg1 & 0xff; 1176 uint8_t clear = (cmd->arg1 >> 8) & 0xff; 1177 1178 if (list == f_tcpflags && set == TH_SYN && clear == TH_ACK) { 1179 bprintf(bp, " setup"); 1180 return; 1181 } 1182 1183 bprintf(bp, " %s ", name); 1184 for (i=0; list[i].x != 0; i++) { 1185 if (set & list[i].x) { 1186 set &= ~list[i].x; 1187 bprintf(bp, "%s%s", comma, list[i].s); 1188 comma = ","; 1189 } 1190 if (clear & list[i].x) { 1191 clear &= ~list[i].x; 1192 bprintf(bp, "%s!%s", comma, list[i].s); 1193 comma = ","; 1194 } 1195 } 1196 } 1197 1198 1199 /* 1200 * Print the ip address contained in a command. 1201 */ 1202 static void 1203 print_ip(struct buf_pr *bp, const struct format_opts *fo, 1204 const ipfw_insn_ip *cmd) 1205 { 1206 struct hostent *he = NULL; 1207 const struct in_addr *ia; 1208 const uint32_t *a = ((const ipfw_insn_u32 *)cmd)->d; 1209 uint32_t len = F_LEN((const ipfw_insn *)cmd); 1210 char *t; 1211 1212 bprintf(bp, " "); 1213 if (cmd->o.opcode == O_IP_DST_LOOKUP && len > F_INSN_SIZE(ipfw_insn_u32)) { 1214 uint32_t d = a[1]; 1215 const char *arg = "<invalid>"; 1216 1217 if (d < sizeof(lookup_key)/sizeof(lookup_key[0])) 1218 arg = match_value(rule_options, lookup_key[d]); 1219 t = table_search_ctlv(fo->tstate, 1220 ((const ipfw_insn *)cmd)->arg1); 1221 bprintf(bp, "lookup %s %s", arg, t); 1222 return; 1223 } 1224 if (cmd->o.opcode == O_IP_SRC_ME || cmd->o.opcode == O_IP_DST_ME) { 1225 bprintf(bp, "me"); 1226 return; 1227 } 1228 if (cmd->o.opcode == O_IP_SRC_LOOKUP || 1229 cmd->o.opcode == O_IP_DST_LOOKUP) { 1230 t = table_search_ctlv(fo->tstate, 1231 ((const ipfw_insn *)cmd)->arg1); 1232 bprintf(bp, "table(%s", t); 1233 if (len == F_INSN_SIZE(ipfw_insn_u32)) 1234 bprintf(bp, ",%u", *a); 1235 bprintf(bp, ")"); 1236 return; 1237 } 1238 if (cmd->o.opcode == O_IP_SRC_SET || cmd->o.opcode == O_IP_DST_SET) { 1239 const uint32_t *map = (const uint32_t *)&cmd->mask; 1240 struct in_addr addr; 1241 uint32_t x; 1242 int i, j; 1243 char comma = '{'; 1244 1245 x = cmd->o.arg1 - 1; 1246 x = htonl(~x); 1247 addr.s_addr = htonl(cmd->addr.s_addr); 1248 bprintf(bp, "%s/%d", inet_ntoa(addr), 1249 contigmask((uint8_t *)&x, 32)); 1250 x = cmd->addr.s_addr; 1251 x &= 0xff; /* base */ 1252 /* 1253 * Print bits and ranges. 1254 * Locate first bit set (i), then locate first bit unset (j). 1255 * If we have 3+ consecutive bits set, then print them as a 1256 * range, otherwise only print the initial bit and rescan. 1257 */ 1258 for (i=0; i < cmd->o.arg1; i++) 1259 if (map[i/32] & (1<<(i & 31))) { 1260 for (j=i+1; j < cmd->o.arg1; j++) 1261 if (!(map[ j/32] & (1<<(j & 31)))) 1262 break; 1263 bprintf(bp, "%c%d", comma, i+x); 1264 if (j>i+2) { /* range has at least 3 elements */ 1265 bprintf(bp, "-%d", j-1+x); 1266 i = j-1; 1267 } 1268 comma = ','; 1269 } 1270 bprintf(bp, "}"); 1271 return; 1272 } 1273 /* 1274 * len == 2 indicates a single IP, whereas lists of 1 or more 1275 * addr/mask pairs have len = (2n+1). We convert len to n so we 1276 * use that to count the number of entries. 1277 */ 1278 for (len = len / 2; len > 0; len--, a += 2) { 1279 int mb = /* mask length */ 1280 (cmd->o.opcode == O_IP_SRC || cmd->o.opcode == O_IP_DST) ? 1281 32 : contigmask((const uint8_t *)&(a[1]), 32); 1282 if (mb == 32 && g_co.do_resolv) 1283 he = gethostbyaddr((const char *)&(a[0]), sizeof(in_addr_t), 1284 AF_INET); 1285 if (he != NULL) /* resolved to name */ 1286 bprintf(bp, "%s", he->h_name); 1287 else if (mb == 0) /* any */ 1288 bprintf(bp, "any"); 1289 else { /* numeric IP followed by some kind of mask */ 1290 ia = (const struct in_addr *)&a[0]; 1291 bprintf(bp, "%s", inet_ntoa(*ia)); 1292 if (mb < 0) { 1293 ia = (const struct in_addr *)&a[1]; 1294 bprintf(bp, ":%s", inet_ntoa(*ia)); 1295 } else if (mb < 32) 1296 bprintf(bp, "/%d", mb); 1297 } 1298 if (len > 1) 1299 bprintf(bp, ","); 1300 } 1301 } 1302 1303 /* 1304 * prints a MAC address/mask pair 1305 */ 1306 static void 1307 format_mac(struct buf_pr *bp, const uint8_t *addr, const uint8_t *mask) 1308 { 1309 int l = contigmask(mask, 48); 1310 1311 if (l == 0) 1312 bprintf(bp, " any"); 1313 else { 1314 bprintf(bp, " %02x:%02x:%02x:%02x:%02x:%02x", 1315 addr[0], addr[1], addr[2], addr[3], addr[4], addr[5]); 1316 if (l == -1) 1317 bprintf(bp, "&%02x:%02x:%02x:%02x:%02x:%02x", 1318 mask[0], mask[1], mask[2], 1319 mask[3], mask[4], mask[5]); 1320 else if (l < 48) 1321 bprintf(bp, "/%d", l); 1322 } 1323 } 1324 1325 static void 1326 print_mac(struct buf_pr *bp, const ipfw_insn_mac *mac) 1327 { 1328 1329 bprintf(bp, " MAC"); 1330 format_mac(bp, mac->addr, mac->mask); 1331 format_mac(bp, mac->addr + 6, mac->mask + 6); 1332 } 1333 1334 static void 1335 fill_icmptypes(ipfw_insn_u32 *cmd, char *av) 1336 { 1337 uint8_t type; 1338 1339 cmd->d[0] = 0; 1340 while (*av) { 1341 if (*av == ',') 1342 av++; 1343 1344 type = strtoul(av, &av, 0); 1345 1346 if (*av != ',' && *av != '\0') 1347 errx(EX_DATAERR, "invalid ICMP type"); 1348 1349 if (type > 31) 1350 errx(EX_DATAERR, "ICMP type out of range"); 1351 1352 cmd->d[0] |= 1 << type; 1353 } 1354 cmd->o.opcode = O_ICMPTYPE; 1355 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32); 1356 } 1357 1358 static void 1359 print_icmptypes(struct buf_pr *bp, const ipfw_insn_u32 *cmd) 1360 { 1361 int i; 1362 char sep= ' '; 1363 1364 bprintf(bp, " icmptypes"); 1365 for (i = 0; i < 32; i++) { 1366 if ( (cmd->d[0] & (1 << (i))) == 0) 1367 continue; 1368 bprintf(bp, "%c%d", sep, i); 1369 sep = ','; 1370 } 1371 } 1372 1373 static void 1374 print_dscp(struct buf_pr *bp, const ipfw_insn_u32 *cmd) 1375 { 1376 const uint32_t *v; 1377 const char *code; 1378 int i = 0; 1379 char sep= ' '; 1380 1381 bprintf(bp, " dscp"); 1382 v = cmd->d; 1383 while (i < 64) { 1384 if (*v & (1 << i)) { 1385 if ((code = match_value(f_ipdscp, i)) != NULL) 1386 bprintf(bp, "%c%s", sep, code); 1387 else 1388 bprintf(bp, "%c%d", sep, i); 1389 sep = ','; 1390 } 1391 1392 if ((++i % 32) == 0) 1393 v++; 1394 } 1395 } 1396 1397 #define insntod(cmd, type) ((const ipfw_insn_ ## type *)(cmd)) 1398 struct show_state { 1399 struct ip_fw_rule *rule; 1400 const ipfw_insn *eaction; 1401 uint8_t *printed; 1402 int flags; 1403 #define HAVE_PROTO 0x0001 1404 #define HAVE_SRCIP 0x0002 1405 #define HAVE_DSTIP 0x0004 1406 #define HAVE_PROBE_STATE 0x0008 1407 int proto; 1408 int or_block; 1409 }; 1410 1411 static int 1412 init_show_state(struct show_state *state, struct ip_fw_rule *rule) 1413 { 1414 1415 state->printed = calloc(rule->cmd_len, sizeof(uint8_t)); 1416 if (state->printed == NULL) 1417 return (ENOMEM); 1418 state->rule = rule; 1419 state->eaction = NULL; 1420 state->flags = 0; 1421 state->proto = 0; 1422 state->or_block = 0; 1423 return (0); 1424 } 1425 1426 static void 1427 free_show_state(struct show_state *state) 1428 { 1429 1430 free(state->printed); 1431 } 1432 1433 static uint8_t 1434 is_printed_opcode(struct show_state *state, const ipfw_insn *cmd) 1435 { 1436 1437 return (state->printed[cmd - state->rule->cmd]); 1438 } 1439 1440 static void 1441 mark_printed(struct show_state *state, const ipfw_insn *cmd) 1442 { 1443 1444 state->printed[cmd - state->rule->cmd] = 1; 1445 } 1446 1447 static void 1448 print_limit_mask(struct buf_pr *bp, const ipfw_insn_limit *limit) 1449 { 1450 struct _s_x *p = limit_masks; 1451 char const *comma = " "; 1452 uint8_t x; 1453 1454 for (x = limit->limit_mask; p->x != 0; p++) { 1455 if ((x & p->x) == p->x) { 1456 x &= ~p->x; 1457 bprintf(bp, "%s%s", comma, p->s); 1458 comma = ","; 1459 } 1460 } 1461 bprint_uint_arg(bp, " ", limit->conn_limit); 1462 } 1463 1464 static int 1465 print_instruction(struct buf_pr *bp, const struct format_opts *fo, 1466 struct show_state *state, const ipfw_insn *cmd) 1467 { 1468 struct protoent *pe; 1469 struct passwd *pwd; 1470 struct group *grp; 1471 const char *s; 1472 double d; 1473 1474 if (is_printed_opcode(state, cmd)) 1475 return (0); 1476 if ((cmd->len & F_OR) != 0 && state->or_block == 0) 1477 bprintf(bp, " {"); 1478 if (cmd->opcode != O_IN && (cmd->len & F_NOT) != 0) 1479 bprintf(bp, " not"); 1480 1481 switch (cmd->opcode) { 1482 case O_PROB: 1483 d = 1.0 * insntod(cmd, u32)->d[0] / 0x7fffffff; 1484 bprintf(bp, "prob %f ", d); 1485 break; 1486 case O_PROBE_STATE: /* no need to print anything here */ 1487 state->flags |= HAVE_PROBE_STATE; 1488 break; 1489 case O_IP_SRC: 1490 case O_IP_SRC_LOOKUP: 1491 case O_IP_SRC_MASK: 1492 case O_IP_SRC_ME: 1493 case O_IP_SRC_SET: 1494 if (state->flags & HAVE_SRCIP) 1495 bprintf(bp, " src-ip"); 1496 print_ip(bp, fo, insntod(cmd, ip)); 1497 break; 1498 case O_IP_DST: 1499 case O_IP_DST_LOOKUP: 1500 case O_IP_DST_MASK: 1501 case O_IP_DST_ME: 1502 case O_IP_DST_SET: 1503 if (state->flags & HAVE_DSTIP) 1504 bprintf(bp, " dst-ip"); 1505 print_ip(bp, fo, insntod(cmd, ip)); 1506 break; 1507 case O_IP6_SRC: 1508 case O_IP6_SRC_MASK: 1509 case O_IP6_SRC_ME: 1510 if (state->flags & HAVE_SRCIP) 1511 bprintf(bp, " src-ip6"); 1512 print_ip6(bp, insntod(cmd, ip6)); 1513 break; 1514 case O_IP6_DST: 1515 case O_IP6_DST_MASK: 1516 case O_IP6_DST_ME: 1517 if (state->flags & HAVE_DSTIP) 1518 bprintf(bp, " dst-ip6"); 1519 print_ip6(bp, insntod(cmd, ip6)); 1520 break; 1521 case O_FLOW6ID: 1522 print_flow6id(bp, insntod(cmd, u32)); 1523 break; 1524 case O_IP_DSTPORT: 1525 case O_IP_SRCPORT: 1526 print_newports(bp, insntod(cmd, u16), state->proto, 1527 (state->flags & (HAVE_SRCIP | HAVE_DSTIP)) == 1528 (HAVE_SRCIP | HAVE_DSTIP) ? cmd->opcode: 0); 1529 break; 1530 case O_PROTO: 1531 pe = getprotobynumber(cmd->arg1); 1532 if (state->flags & HAVE_PROTO) 1533 bprintf(bp, " proto"); 1534 if (pe != NULL) 1535 bprintf(bp, " %s", pe->p_name); 1536 else 1537 bprintf(bp, " %u", cmd->arg1); 1538 state->proto = cmd->arg1; 1539 break; 1540 case O_MACADDR2: 1541 print_mac(bp, insntod(cmd, mac)); 1542 break; 1543 case O_MAC_TYPE: 1544 print_newports(bp, insntod(cmd, u16), 1545 IPPROTO_ETHERTYPE, cmd->opcode); 1546 break; 1547 case O_FRAG: 1548 print_flags(bp, "frag", cmd, f_ipoff); 1549 break; 1550 case O_FIB: 1551 bprintf(bp, " fib %u", cmd->arg1); 1552 break; 1553 case O_SOCKARG: 1554 bprintf(bp, " sockarg"); 1555 break; 1556 case O_IN: 1557 bprintf(bp, cmd->len & F_NOT ? " out" : " in"); 1558 break; 1559 case O_DIVERTED: 1560 switch (cmd->arg1) { 1561 case 3: 1562 bprintf(bp, " diverted"); 1563 break; 1564 case 2: 1565 bprintf(bp, " diverted-output"); 1566 break; 1567 case 1: 1568 bprintf(bp, " diverted-loopback"); 1569 break; 1570 default: 1571 bprintf(bp, " diverted-?<%u>", cmd->arg1); 1572 break; 1573 } 1574 break; 1575 case O_LAYER2: 1576 bprintf(bp, " layer2"); 1577 break; 1578 case O_XMIT: 1579 case O_RECV: 1580 case O_VIA: 1581 if (cmd->opcode == O_XMIT) 1582 s = "xmit"; 1583 else if (cmd->opcode == O_RECV) 1584 s = "recv"; 1585 else /* if (cmd->opcode == O_VIA) */ 1586 s = "via"; 1587 switch (insntod(cmd, if)->name[0]) { 1588 case '\0': 1589 bprintf(bp, " %s %s", s, 1590 inet_ntoa(insntod(cmd, if)->p.ip)); 1591 break; 1592 case '\1': 1593 bprintf(bp, " %s table(%s)", s, 1594 table_search_ctlv(fo->tstate, 1595 insntod(cmd, if)->p.kidx)); 1596 break; 1597 default: 1598 bprintf(bp, " %s %s", s, 1599 insntod(cmd, if)->name); 1600 } 1601 break; 1602 case O_IP_FLOW_LOOKUP: 1603 s = table_search_ctlv(fo->tstate, cmd->arg1); 1604 bprintf(bp, " flow table(%s", s); 1605 if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_u32)) 1606 bprintf(bp, ",%u", insntod(cmd, u32)->d[0]); 1607 bprintf(bp, ")"); 1608 break; 1609 case O_IPID: 1610 case O_IPTTL: 1611 case O_IPLEN: 1612 case O_TCPDATALEN: 1613 case O_TCPMSS: 1614 case O_TCPWIN: 1615 if (F_LEN(cmd) == 1) { 1616 switch (cmd->opcode) { 1617 case O_IPID: 1618 s = "ipid"; 1619 break; 1620 case O_IPTTL: 1621 s = "ipttl"; 1622 break; 1623 case O_IPLEN: 1624 s = "iplen"; 1625 break; 1626 case O_TCPDATALEN: 1627 s = "tcpdatalen"; 1628 break; 1629 case O_TCPMSS: 1630 s = "tcpmss"; 1631 break; 1632 case O_TCPWIN: 1633 s = "tcpwin"; 1634 break; 1635 default: 1636 s = "<unknown>"; 1637 break; 1638 } 1639 bprintf(bp, " %s %u", s, cmd->arg1); 1640 } else 1641 print_newports(bp, insntod(cmd, u16), 0, 1642 cmd->opcode); 1643 break; 1644 case O_IPVER: 1645 bprintf(bp, " ipver %u", cmd->arg1); 1646 break; 1647 case O_IPPRECEDENCE: 1648 bprintf(bp, " ipprecedence %u", cmd->arg1 >> 5); 1649 break; 1650 case O_DSCP: 1651 print_dscp(bp, insntod(cmd, u32)); 1652 break; 1653 case O_IPOPT: 1654 print_flags(bp, "ipoptions", cmd, f_ipopts); 1655 break; 1656 case O_IPTOS: 1657 print_flags(bp, "iptos", cmd, f_iptos); 1658 break; 1659 case O_ICMPTYPE: 1660 print_icmptypes(bp, insntod(cmd, u32)); 1661 break; 1662 case O_ESTAB: 1663 bprintf(bp, " established"); 1664 break; 1665 case O_TCPFLAGS: 1666 print_flags(bp, "tcpflags", cmd, f_tcpflags); 1667 break; 1668 case O_TCPOPTS: 1669 print_flags(bp, "tcpoptions", cmd, f_tcpopts); 1670 break; 1671 case O_TCPACK: 1672 bprintf(bp, " tcpack %d", 1673 ntohl(insntod(cmd, u32)->d[0])); 1674 break; 1675 case O_TCPSEQ: 1676 bprintf(bp, " tcpseq %d", 1677 ntohl(insntod(cmd, u32)->d[0])); 1678 break; 1679 case O_UID: 1680 pwd = getpwuid(insntod(cmd, u32)->d[0]); 1681 if (pwd != NULL) 1682 bprintf(bp, " uid %s", pwd->pw_name); 1683 else 1684 bprintf(bp, " uid %u", 1685 insntod(cmd, u32)->d[0]); 1686 break; 1687 case O_GID: 1688 grp = getgrgid(insntod(cmd, u32)->d[0]); 1689 if (grp != NULL) 1690 bprintf(bp, " gid %s", grp->gr_name); 1691 else 1692 bprintf(bp, " gid %u", 1693 insntod(cmd, u32)->d[0]); 1694 break; 1695 case O_JAIL: 1696 bprintf(bp, " jail %d", insntod(cmd, u32)->d[0]); 1697 break; 1698 case O_VERREVPATH: 1699 bprintf(bp, " verrevpath"); 1700 break; 1701 case O_VERSRCREACH: 1702 bprintf(bp, " versrcreach"); 1703 break; 1704 case O_ANTISPOOF: 1705 bprintf(bp, " antispoof"); 1706 break; 1707 case O_IPSEC: 1708 bprintf(bp, " ipsec"); 1709 break; 1710 case O_NOP: 1711 bprintf(bp, " // %s", (const char *)(cmd + 1)); 1712 break; 1713 case O_KEEP_STATE: 1714 if (state->flags & HAVE_PROBE_STATE) 1715 bprintf(bp, " keep-state"); 1716 else 1717 bprintf(bp, " record-state"); 1718 bprintf(bp, " :%s", 1719 object_search_ctlv(fo->tstate, cmd->arg1, 1720 IPFW_TLV_STATE_NAME)); 1721 break; 1722 case O_LIMIT: 1723 if (state->flags & HAVE_PROBE_STATE) 1724 bprintf(bp, " limit"); 1725 else 1726 bprintf(bp, " set-limit"); 1727 print_limit_mask(bp, insntod(cmd, limit)); 1728 bprintf(bp, " :%s", 1729 object_search_ctlv(fo->tstate, cmd->arg1, 1730 IPFW_TLV_STATE_NAME)); 1731 break; 1732 case O_IP6: 1733 if (state->flags & HAVE_PROTO) 1734 bprintf(bp, " proto"); 1735 bprintf(bp, " ip6"); 1736 break; 1737 case O_IP4: 1738 if (state->flags & HAVE_PROTO) 1739 bprintf(bp, " proto"); 1740 bprintf(bp, " ip4"); 1741 break; 1742 case O_ICMP6TYPE: 1743 print_icmp6types(bp, insntod(cmd, u32)); 1744 break; 1745 case O_EXT_HDR: 1746 print_ext6hdr(bp, cmd); 1747 break; 1748 case O_TAGGED: 1749 if (F_LEN(cmd) == 1) 1750 bprint_uint_arg(bp, " tagged ", cmd->arg1); 1751 else 1752 print_newports(bp, insntod(cmd, u16), 1753 0, O_TAGGED); 1754 break; 1755 case O_SKIP_ACTION: 1756 bprintf(bp, " defer-immediate-action"); 1757 break; 1758 default: 1759 bprintf(bp, " [opcode %d len %d]", cmd->opcode, 1760 cmd->len); 1761 } 1762 if (cmd->len & F_OR) { 1763 bprintf(bp, " or"); 1764 state->or_block = 1; 1765 } else if (state->or_block != 0) { 1766 bprintf(bp, " }"); 1767 state->or_block = 0; 1768 } 1769 mark_printed(state, cmd); 1770 1771 return (1); 1772 } 1773 1774 static ipfw_insn * 1775 print_opcode(struct buf_pr *bp, struct format_opts *fo, 1776 struct show_state *state, int opcode) 1777 { 1778 ipfw_insn *cmd; 1779 int l; 1780 1781 for (l = state->rule->act_ofs, cmd = state->rule->cmd; 1782 l > 0; l -= F_LEN(cmd), cmd += F_LEN(cmd)) { 1783 /* We use zero opcode to print the rest of options */ 1784 if (opcode >= 0 && cmd->opcode != opcode) 1785 continue; 1786 /* 1787 * Skip O_NOP, when we printing the rest 1788 * of options, it will be handled separately. 1789 */ 1790 if (cmd->opcode == O_NOP && opcode != O_NOP) 1791 continue; 1792 if (!print_instruction(bp, fo, state, cmd)) 1793 continue; 1794 return (cmd); 1795 } 1796 return (NULL); 1797 } 1798 1799 static void 1800 print_fwd(struct buf_pr *bp, const ipfw_insn *cmd) 1801 { 1802 char buf[INET6_ADDRSTRLEN + IF_NAMESIZE + 2]; 1803 const ipfw_insn_sa6 *sa6; 1804 const ipfw_insn_sa *sa; 1805 uint16_t port; 1806 1807 if (cmd->opcode == O_FORWARD_IP) { 1808 sa = insntod(cmd, sa); 1809 port = sa->sa.sin_port; 1810 if (sa->sa.sin_addr.s_addr == INADDR_ANY) 1811 bprintf(bp, "fwd tablearg"); 1812 else 1813 bprintf(bp, "fwd %s", inet_ntoa(sa->sa.sin_addr)); 1814 } else { 1815 sa6 = insntod(cmd, sa6); 1816 port = sa6->sa.sin6_port; 1817 bprintf(bp, "fwd "); 1818 if (getnameinfo((const struct sockaddr *)&sa6->sa, 1819 sizeof(struct sockaddr_in6), buf, sizeof(buf), NULL, 0, 1820 NI_NUMERICHOST) == 0) 1821 bprintf(bp, "%s", buf); 1822 } 1823 if (port != 0) 1824 bprintf(bp, ",%u", port); 1825 } 1826 1827 static int 1828 print_action_instruction(struct buf_pr *bp, const struct format_opts *fo, 1829 struct show_state *state, const ipfw_insn *cmd) 1830 { 1831 const char *s; 1832 1833 if (is_printed_opcode(state, cmd)) 1834 return (0); 1835 switch (cmd->opcode) { 1836 case O_CHECK_STATE: 1837 bprintf(bp, "check-state"); 1838 if (cmd->arg1 != 0) 1839 s = object_search_ctlv(fo->tstate, cmd->arg1, 1840 IPFW_TLV_STATE_NAME); 1841 else 1842 s = NULL; 1843 bprintf(bp, " :%s", s ? s: "any"); 1844 break; 1845 case O_ACCEPT: 1846 bprintf(bp, "allow"); 1847 break; 1848 case O_COUNT: 1849 bprintf(bp, "count"); 1850 break; 1851 case O_DENY: 1852 bprintf(bp, "deny"); 1853 break; 1854 case O_REJECT: 1855 if (cmd->arg1 == ICMP_REJECT_RST) 1856 bprintf(bp, "reset"); 1857 else if (cmd->arg1 == ICMP_REJECT_ABORT) 1858 bprintf(bp, "abort"); 1859 else if (cmd->arg1 == ICMP_UNREACH_HOST) 1860 bprintf(bp, "reject"); 1861 else 1862 print_reject_code(bp, cmd->arg1); 1863 break; 1864 case O_UNREACH6: 1865 if (cmd->arg1 == ICMP6_UNREACH_RST) 1866 bprintf(bp, "reset6"); 1867 else if (cmd->arg1 == ICMP6_UNREACH_ABORT) 1868 bprintf(bp, "abort6"); 1869 else 1870 print_unreach6_code(bp, cmd->arg1); 1871 break; 1872 case O_SKIPTO: 1873 bprint_uint_arg(bp, "skipto ", cmd->arg1); 1874 break; 1875 case O_PIPE: 1876 bprint_uint_arg(bp, "pipe ", cmd->arg1); 1877 break; 1878 case O_QUEUE: 1879 bprint_uint_arg(bp, "queue ", cmd->arg1); 1880 break; 1881 case O_DIVERT: 1882 bprint_uint_arg(bp, "divert ", cmd->arg1); 1883 break; 1884 case O_TEE: 1885 bprint_uint_arg(bp, "tee ", cmd->arg1); 1886 break; 1887 case O_NETGRAPH: 1888 bprint_uint_arg(bp, "netgraph ", cmd->arg1); 1889 break; 1890 case O_NGTEE: 1891 bprint_uint_arg(bp, "ngtee ", cmd->arg1); 1892 break; 1893 case O_FORWARD_IP: 1894 case O_FORWARD_IP6: 1895 print_fwd(bp, cmd); 1896 break; 1897 case O_LOG: 1898 if (insntod(cmd, log)->max_log > 0) 1899 bprintf(bp, " log logamount %d", 1900 insntod(cmd, log)->max_log); 1901 else 1902 bprintf(bp, " log"); 1903 break; 1904 case O_ALTQ: 1905 #ifndef NO_ALTQ 1906 print_altq_cmd(bp, insntod(cmd, altq)); 1907 #endif 1908 break; 1909 case O_TAG: 1910 bprint_uint_arg(bp, cmd->len & F_NOT ? " untag ": 1911 " tag ", cmd->arg1); 1912 break; 1913 case O_NAT: 1914 if (cmd->arg1 != IP_FW_NAT44_GLOBAL) 1915 bprint_uint_arg(bp, "nat ", cmd->arg1); 1916 else 1917 bprintf(bp, "nat global"); 1918 break; 1919 case O_SETFIB: 1920 if (cmd->arg1 == IP_FW_TARG) 1921 bprint_uint_arg(bp, "setfib ", cmd->arg1); 1922 else 1923 bprintf(bp, "setfib %u", cmd->arg1 & 0x7FFF); 1924 break; 1925 case O_EXTERNAL_ACTION: 1926 /* 1927 * The external action can consists of two following 1928 * each other opcodes - O_EXTERNAL_ACTION and 1929 * O_EXTERNAL_INSTANCE. The first contains the ID of 1930 * name of external action. The second contains the ID 1931 * of name of external action instance. 1932 * NOTE: in case when external action has no named 1933 * instances support, the second opcode isn't needed. 1934 */ 1935 state->eaction = cmd; 1936 s = object_search_ctlv(fo->tstate, cmd->arg1, 1937 IPFW_TLV_EACTION); 1938 if (match_token(rule_eactions, s) != -1) 1939 bprintf(bp, "%s", s); 1940 else 1941 bprintf(bp, "eaction %s", s); 1942 break; 1943 case O_EXTERNAL_INSTANCE: 1944 if (state->eaction == NULL) 1945 break; 1946 /* 1947 * XXX: we need to teach ipfw(9) to rewrite opcodes 1948 * in the user buffer on rule addition. When we add 1949 * the rule, we specify zero TLV type for 1950 * O_EXTERNAL_INSTANCE object. To show correct 1951 * rule after `ipfw add` we need to search instance 1952 * name with zero type. But when we do `ipfw show` 1953 * we calculate TLV type using IPFW_TLV_EACTION_NAME() 1954 * macro. 1955 */ 1956 s = object_search_ctlv(fo->tstate, cmd->arg1, 0); 1957 if (s == NULL) 1958 s = object_search_ctlv(fo->tstate, 1959 cmd->arg1, IPFW_TLV_EACTION_NAME( 1960 state->eaction->arg1)); 1961 bprintf(bp, " %s", s); 1962 break; 1963 case O_EXTERNAL_DATA: 1964 if (state->eaction == NULL) 1965 break; 1966 /* 1967 * Currently we support data formatting only for 1968 * external data with datalen u16. For unknown data 1969 * print its size in bytes. 1970 */ 1971 if (cmd->len == F_INSN_SIZE(ipfw_insn)) 1972 bprintf(bp, " %u", cmd->arg1); 1973 else 1974 bprintf(bp, " %ubytes", 1975 cmd->len * sizeof(uint32_t)); 1976 break; 1977 case O_SETDSCP: 1978 if (cmd->arg1 == IP_FW_TARG) { 1979 bprintf(bp, "setdscp tablearg"); 1980 break; 1981 } 1982 s = match_value(f_ipdscp, cmd->arg1 & 0x3F); 1983 if (s != NULL) 1984 bprintf(bp, "setdscp %s", s); 1985 else 1986 bprintf(bp, "setdscp %u", cmd->arg1 & 0x3F); 1987 break; 1988 case O_REASS: 1989 bprintf(bp, "reass"); 1990 break; 1991 case O_CALLRETURN: 1992 if (cmd->len & F_NOT) 1993 bprintf(bp, "return"); 1994 else 1995 bprint_uint_arg(bp, "call ", cmd->arg1); 1996 break; 1997 default: 1998 bprintf(bp, "** unrecognized action %d len %d ", 1999 cmd->opcode, cmd->len); 2000 } 2001 mark_printed(state, cmd); 2002 2003 return (1); 2004 } 2005 2006 2007 static ipfw_insn * 2008 print_action(struct buf_pr *bp, struct format_opts *fo, 2009 struct show_state *state, uint8_t opcode) 2010 { 2011 ipfw_insn *cmd; 2012 int l; 2013 2014 for (l = state->rule->cmd_len - state->rule->act_ofs, 2015 cmd = ACTION_PTR(state->rule); l > 0; 2016 l -= F_LEN(cmd), cmd += F_LEN(cmd)) { 2017 if (cmd->opcode != opcode) 2018 continue; 2019 if (!print_action_instruction(bp, fo, state, cmd)) 2020 continue; 2021 return (cmd); 2022 } 2023 return (NULL); 2024 } 2025 2026 static void 2027 print_proto(struct buf_pr *bp, struct format_opts *fo, 2028 struct show_state *state) 2029 { 2030 ipfw_insn *cmd; 2031 int l, proto, ip4, ip6; 2032 2033 /* Count all O_PROTO, O_IP4, O_IP6 instructions. */ 2034 proto = ip4 = ip6 = 0; 2035 for (l = state->rule->act_ofs, cmd = state->rule->cmd; 2036 l > 0; l -= F_LEN(cmd), cmd += F_LEN(cmd)) { 2037 switch (cmd->opcode) { 2038 case O_PROTO: 2039 proto++; 2040 break; 2041 case O_IP4: 2042 ip4 = 1; 2043 if (cmd->len & F_OR) 2044 ip4++; 2045 break; 2046 case O_IP6: 2047 ip6 = 1; 2048 if (cmd->len & F_OR) 2049 ip6++; 2050 break; 2051 default: 2052 continue; 2053 } 2054 } 2055 if (proto == 0 && ip4 == 0 && ip6 == 0) { 2056 state->proto = IPPROTO_IP; 2057 state->flags |= HAVE_PROTO; 2058 bprintf(bp, " ip"); 2059 return; 2060 } 2061 /* To handle the case { ip4 or ip6 }, print opcode with F_OR first */ 2062 cmd = NULL; 2063 if (ip4 || ip6) 2064 cmd = print_opcode(bp, fo, state, ip4 > ip6 ? O_IP4: O_IP6); 2065 if (cmd != NULL && (cmd->len & F_OR)) 2066 cmd = print_opcode(bp, fo, state, ip4 > ip6 ? O_IP6: O_IP4); 2067 if (cmd == NULL || (cmd->len & F_OR)) 2068 for (l = proto; l > 0; l--) { 2069 cmd = print_opcode(bp, fo, state, O_PROTO); 2070 if (cmd == NULL || (cmd->len & F_OR) == 0) 2071 break; 2072 } 2073 /* Initialize proto, it is used by print_newports() */ 2074 state->flags |= HAVE_PROTO; 2075 if (state->proto == 0 && ip6 != 0) 2076 state->proto = IPPROTO_IPV6; 2077 } 2078 2079 static int 2080 match_opcode(int opcode, const int opcodes[], size_t nops) 2081 { 2082 size_t i; 2083 2084 for (i = 0; i < nops; i++) 2085 if (opcode == opcodes[i]) 2086 return (1); 2087 return (0); 2088 } 2089 2090 static void 2091 print_address(struct buf_pr *bp, struct format_opts *fo, 2092 struct show_state *state, const int opcodes[], size_t nops, int portop, 2093 int flag) 2094 { 2095 ipfw_insn *cmd; 2096 int count, l, portcnt, pf; 2097 2098 count = portcnt = 0; 2099 for (l = state->rule->act_ofs, cmd = state->rule->cmd; 2100 l > 0; l -= F_LEN(cmd), cmd += F_LEN(cmd)) { 2101 if (match_opcode(cmd->opcode, opcodes, nops)) 2102 count++; 2103 else if (cmd->opcode == portop) 2104 portcnt++; 2105 } 2106 if (count == 0) 2107 bprintf(bp, " any"); 2108 for (l = state->rule->act_ofs, cmd = state->rule->cmd; 2109 l > 0 && count > 0; l -= F_LEN(cmd), cmd += F_LEN(cmd)) { 2110 if (!match_opcode(cmd->opcode, opcodes, nops)) 2111 continue; 2112 print_instruction(bp, fo, state, cmd); 2113 if ((cmd->len & F_OR) == 0) 2114 break; 2115 count--; 2116 } 2117 /* 2118 * If several O_IP_?PORT opcodes specified, leave them to the 2119 * options section. 2120 */ 2121 if (portcnt == 1) { 2122 for (l = state->rule->act_ofs, cmd = state->rule->cmd, pf = 0; 2123 l > 0; l -= F_LEN(cmd), cmd += F_LEN(cmd)) { 2124 if (cmd->opcode != portop) { 2125 pf = (cmd->len & F_OR); 2126 continue; 2127 } 2128 /* Print opcode iff it is not in OR block. */ 2129 if (pf == 0 && (cmd->len & F_OR) == 0) 2130 print_instruction(bp, fo, state, cmd); 2131 break; 2132 } 2133 } 2134 state->flags |= flag; 2135 } 2136 2137 static const int action_opcodes[] = { 2138 O_CHECK_STATE, O_ACCEPT, O_COUNT, O_DENY, O_REJECT, 2139 O_UNREACH6, O_SKIPTO, O_PIPE, O_QUEUE, O_DIVERT, O_TEE, 2140 O_NETGRAPH, O_NGTEE, O_FORWARD_IP, O_FORWARD_IP6, O_NAT, 2141 O_SETFIB, O_SETDSCP, O_REASS, O_CALLRETURN, 2142 /* keep the following opcodes at the end of the list */ 2143 O_EXTERNAL_ACTION, O_EXTERNAL_INSTANCE, O_EXTERNAL_DATA 2144 }; 2145 2146 static const int modifier_opcodes[] = { 2147 O_LOG, O_ALTQ, O_TAG 2148 }; 2149 2150 static const int src_opcodes[] = { 2151 O_IP_SRC, O_IP_SRC_LOOKUP, O_IP_SRC_MASK, O_IP_SRC_ME, 2152 O_IP_SRC_SET, O_IP6_SRC, O_IP6_SRC_MASK, O_IP6_SRC_ME 2153 }; 2154 2155 static const int dst_opcodes[] = { 2156 O_IP_DST, O_IP_DST_LOOKUP, O_IP_DST_MASK, O_IP_DST_ME, 2157 O_IP_DST_SET, O_IP6_DST, O_IP6_DST_MASK, O_IP6_DST_ME 2158 }; 2159 2160 static void 2161 show_static_rule(struct cmdline_opts *co, struct format_opts *fo, 2162 struct buf_pr *bp, struct ip_fw_rule *rule, struct ip_fw_bcounter *cntr) 2163 { 2164 static int twidth = 0; 2165 struct show_state state; 2166 ipfw_insn *cmd; 2167 size_t i; 2168 2169 /* Print # DISABLED or skip the rule */ 2170 if ((fo->set_mask & (1 << rule->set)) == 0) { 2171 /* disabled mask */ 2172 if (!co->show_sets) 2173 return; 2174 else 2175 bprintf(bp, "# DISABLED "); 2176 } 2177 if (init_show_state(&state, rule) != 0) { 2178 warn("init_show_state() failed"); 2179 return; 2180 } 2181 bprintf(bp, "%05u ", rule->rulenum); 2182 2183 /* only if counters are available */ 2184 if (cntr != NULL) { 2185 /* Print counters if enabled */ 2186 if (fo->pcwidth > 0 || fo->bcwidth > 0) { 2187 pr_u64(bp, &cntr->pcnt, fo->pcwidth); 2188 pr_u64(bp, &cntr->bcnt, fo->bcwidth); 2189 } 2190 2191 /* Print timestamp */ 2192 if (co->do_time == TIMESTAMP_NUMERIC) 2193 bprintf(bp, "%10u ", cntr->timestamp); 2194 else if (co->do_time == TIMESTAMP_STRING) { 2195 char timestr[30]; 2196 time_t t = (time_t)0; 2197 2198 if (twidth == 0) { 2199 strcpy(timestr, ctime(&t)); 2200 *strchr(timestr, '\n') = '\0'; 2201 twidth = strlen(timestr); 2202 } 2203 if (cntr->timestamp > 0) { 2204 t = _long_to_time(cntr->timestamp); 2205 2206 strcpy(timestr, ctime(&t)); 2207 *strchr(timestr, '\n') = '\0'; 2208 bprintf(bp, "%s ", timestr); 2209 } else { 2210 bprintf(bp, "%*s ", twidth, ""); 2211 } 2212 } 2213 } 2214 2215 /* Print set number */ 2216 if (co->show_sets) 2217 bprintf(bp, "set %d ", rule->set); 2218 2219 /* Print the optional "match probability" */ 2220 cmd = print_opcode(bp, fo, &state, O_PROB); 2221 /* Print rule action */ 2222 for (i = 0; i < nitems(action_opcodes); i++) { 2223 cmd = print_action(bp, fo, &state, action_opcodes[i]); 2224 if (cmd == NULL) 2225 continue; 2226 /* Handle special cases */ 2227 switch (cmd->opcode) { 2228 case O_CHECK_STATE: 2229 goto end; 2230 case O_EXTERNAL_ACTION: 2231 case O_EXTERNAL_INSTANCE: 2232 /* External action can have several instructions */ 2233 continue; 2234 } 2235 break; 2236 } 2237 /* Print rule modifiers */ 2238 for (i = 0; i < nitems(modifier_opcodes); i++) 2239 print_action(bp, fo, &state, modifier_opcodes[i]); 2240 /* 2241 * Print rule body 2242 */ 2243 if (co->comment_only != 0) 2244 goto end; 2245 2246 if (rule->flags & IPFW_RULE_JUSTOPTS) { 2247 state.flags |= HAVE_PROTO | HAVE_SRCIP | HAVE_DSTIP; 2248 goto justopts; 2249 } 2250 2251 print_proto(bp, fo, &state); 2252 if (co->do_compact != 0 && (rule->flags & IPFW_RULE_NOOPT)) 2253 goto justopts; 2254 2255 /* Print source */ 2256 bprintf(bp, " from"); 2257 print_address(bp, fo, &state, src_opcodes, nitems(src_opcodes), 2258 O_IP_SRCPORT, HAVE_SRCIP); 2259 2260 /* Print destination */ 2261 bprintf(bp, " to"); 2262 print_address(bp, fo, &state, dst_opcodes, nitems(dst_opcodes), 2263 O_IP_DSTPORT, HAVE_DSTIP); 2264 2265 justopts: 2266 /* Print the rest of options */ 2267 while (print_opcode(bp, fo, &state, -1)) 2268 ; 2269 end: 2270 /* Print comment at the end */ 2271 cmd = print_opcode(bp, fo, &state, O_NOP); 2272 if (co->comment_only != 0 && cmd == NULL) 2273 bprintf(bp, " // ..."); 2274 bprintf(bp, "\n"); 2275 free_show_state(&state); 2276 } 2277 2278 static void 2279 show_dyn_state(struct cmdline_opts *co, struct format_opts *fo, 2280 struct buf_pr *bp, ipfw_dyn_rule *d) 2281 { 2282 struct protoent *pe; 2283 struct in_addr a; 2284 uint16_t rulenum; 2285 char buf[INET6_ADDRSTRLEN]; 2286 2287 if (d->expire == 0 && d->dyn_type != O_LIMIT_PARENT) 2288 return; 2289 2290 bcopy(&d->rule, &rulenum, sizeof(rulenum)); 2291 bprintf(bp, "%05d", rulenum); 2292 if (fo->pcwidth > 0 || fo->bcwidth > 0) { 2293 bprintf(bp, " "); 2294 pr_u64(bp, &d->pcnt, fo->pcwidth); 2295 pr_u64(bp, &d->bcnt, fo->bcwidth); 2296 bprintf(bp, "(%ds)", d->expire); 2297 } 2298 switch (d->dyn_type) { 2299 case O_LIMIT_PARENT: 2300 bprintf(bp, " PARENT %d", d->count); 2301 break; 2302 case O_LIMIT: 2303 bprintf(bp, " LIMIT"); 2304 break; 2305 case O_KEEP_STATE: /* bidir, no mask */ 2306 bprintf(bp, " STATE"); 2307 break; 2308 } 2309 2310 if ((pe = getprotobynumber(d->id.proto)) != NULL) 2311 bprintf(bp, " %s", pe->p_name); 2312 else 2313 bprintf(bp, " proto %u", d->id.proto); 2314 2315 if (d->id.addr_type == 4) { 2316 a.s_addr = htonl(d->id.src_ip); 2317 bprintf(bp, " %s %d", inet_ntoa(a), d->id.src_port); 2318 2319 a.s_addr = htonl(d->id.dst_ip); 2320 bprintf(bp, " <-> %s %d", inet_ntoa(a), d->id.dst_port); 2321 } else if (d->id.addr_type == 6) { 2322 bprintf(bp, " %s %d", inet_ntop(AF_INET6, &d->id.src_ip6, buf, 2323 sizeof(buf)), d->id.src_port); 2324 bprintf(bp, " <-> %s %d", inet_ntop(AF_INET6, &d->id.dst_ip6, 2325 buf, sizeof(buf)), d->id.dst_port); 2326 } else 2327 bprintf(bp, " UNKNOWN <-> UNKNOWN"); 2328 if (d->kidx != 0) 2329 bprintf(bp, " :%s", object_search_ctlv(fo->tstate, 2330 d->kidx, IPFW_TLV_STATE_NAME)); 2331 2332 #define BOTH_SYN (TH_SYN | (TH_SYN << 8)) 2333 #define BOTH_FIN (TH_FIN | (TH_FIN << 8)) 2334 if (co->verbose) { 2335 bprintf(bp, " state 0x%08x%s", d->state, 2336 d->state ? " ": ","); 2337 if (d->state & IPFW_DYN_ORPHANED) 2338 bprintf(bp, "ORPHANED,"); 2339 if ((d->state & BOTH_SYN) == BOTH_SYN) 2340 bprintf(bp, "BOTH_SYN,"); 2341 else { 2342 if (d->state & TH_SYN) 2343 bprintf(bp, "F_SYN,"); 2344 if (d->state & (TH_SYN << 8)) 2345 bprintf(bp, "R_SYN,"); 2346 } 2347 if ((d->state & BOTH_FIN) == BOTH_FIN) 2348 bprintf(bp, "BOTH_FIN,"); 2349 else { 2350 if (d->state & TH_FIN) 2351 bprintf(bp, "F_FIN,"); 2352 if (d->state & (TH_FIN << 8)) 2353 bprintf(bp, "R_FIN,"); 2354 } 2355 bprintf(bp, " f_ack 0x%x, r_ack 0x%x", d->ack_fwd, 2356 d->ack_rev); 2357 } 2358 } 2359 2360 static int 2361 do_range_cmd(int cmd, ipfw_range_tlv *rt) 2362 { 2363 ipfw_range_header rh; 2364 size_t sz; 2365 2366 memset(&rh, 0, sizeof(rh)); 2367 memcpy(&rh.range, rt, sizeof(*rt)); 2368 rh.range.head.length = sizeof(*rt); 2369 rh.range.head.type = IPFW_TLV_RANGE; 2370 sz = sizeof(rh); 2371 2372 if (do_get3(cmd, &rh.opheader, &sz) != 0) 2373 return (-1); 2374 /* Save number of matched objects */ 2375 rt->new_set = rh.range.new_set; 2376 return (0); 2377 } 2378 2379 /* 2380 * This one handles all set-related commands 2381 * ipfw set { show | enable | disable } 2382 * ipfw set swap X Y 2383 * ipfw set move X to Y 2384 * ipfw set move rule X to Y 2385 */ 2386 void 2387 ipfw_sets_handler(char *av[]) 2388 { 2389 ipfw_range_tlv rt; 2390 const char *msg; 2391 size_t size; 2392 uint32_t masks[2]; 2393 int i; 2394 uint16_t rulenum; 2395 uint8_t cmd; 2396 2397 av++; 2398 memset(&rt, 0, sizeof(rt)); 2399 2400 if (av[0] == NULL) 2401 errx(EX_USAGE, "set needs command"); 2402 if (_substrcmp(*av, "show") == 0) { 2403 struct format_opts fo; 2404 ipfw_cfg_lheader *cfg; 2405 2406 memset(&fo, 0, sizeof(fo)); 2407 if (ipfw_get_config(&g_co, &fo, &cfg, &size) != 0) 2408 err(EX_OSERR, "requesting config failed"); 2409 2410 for (i = 0, msg = "disable"; i < RESVD_SET; i++) 2411 if ((cfg->set_mask & (1<<i)) == 0) { 2412 printf("%s %d", msg, i); 2413 msg = ""; 2414 } 2415 msg = (cfg->set_mask != (uint32_t)-1) ? " enable" : "enable"; 2416 for (i = 0; i < RESVD_SET; i++) 2417 if ((cfg->set_mask & (1<<i)) != 0) { 2418 printf("%s %d", msg, i); 2419 msg = ""; 2420 } 2421 printf("\n"); 2422 free(cfg); 2423 } else if (_substrcmp(*av, "swap") == 0) { 2424 av++; 2425 if ( av[0] == NULL || av[1] == NULL ) 2426 errx(EX_USAGE, "set swap needs 2 set numbers\n"); 2427 rt.set = atoi(av[0]); 2428 rt.new_set = atoi(av[1]); 2429 if (!isdigit(*(av[0])) || rt.set > RESVD_SET) 2430 errx(EX_DATAERR, "invalid set number %s\n", av[0]); 2431 if (!isdigit(*(av[1])) || rt.new_set > RESVD_SET) 2432 errx(EX_DATAERR, "invalid set number %s\n", av[1]); 2433 i = do_range_cmd(IP_FW_SET_SWAP, &rt); 2434 } else if (_substrcmp(*av, "move") == 0) { 2435 av++; 2436 if (av[0] && _substrcmp(*av, "rule") == 0) { 2437 rt.flags = IPFW_RCFLAG_RANGE; /* move rules to new set */ 2438 cmd = IP_FW_XMOVE; 2439 av++; 2440 } else 2441 cmd = IP_FW_SET_MOVE; /* Move set to new one */ 2442 if (av[0] == NULL || av[1] == NULL || av[2] == NULL || 2443 av[3] != NULL || _substrcmp(av[1], "to") != 0) 2444 errx(EX_USAGE, "syntax: set move [rule] X to Y\n"); 2445 rulenum = atoi(av[0]); 2446 rt.new_set = atoi(av[2]); 2447 if (cmd == IP_FW_XMOVE) { 2448 rt.start_rule = rulenum; 2449 rt.end_rule = rulenum; 2450 } else 2451 rt.set = rulenum; 2452 rt.new_set = atoi(av[2]); 2453 if (!isdigit(*(av[0])) || (cmd == 3 && rt.set > RESVD_SET) || 2454 (cmd == 2 && rt.start_rule == IPFW_DEFAULT_RULE) ) 2455 errx(EX_DATAERR, "invalid source number %s\n", av[0]); 2456 if (!isdigit(*(av[2])) || rt.new_set > RESVD_SET) 2457 errx(EX_DATAERR, "invalid dest. set %s\n", av[1]); 2458 i = do_range_cmd(cmd, &rt); 2459 if (i < 0) 2460 err(EX_OSERR, "failed to move %s", 2461 cmd == IP_FW_SET_MOVE ? "set": "rule"); 2462 } else if (_substrcmp(*av, "disable") == 0 || 2463 _substrcmp(*av, "enable") == 0 ) { 2464 int which = _substrcmp(*av, "enable") == 0 ? 1 : 0; 2465 2466 av++; 2467 masks[0] = masks[1] = 0; 2468 2469 while (av[0]) { 2470 if (isdigit(**av)) { 2471 i = atoi(*av); 2472 if (i < 0 || i > RESVD_SET) 2473 errx(EX_DATAERR, 2474 "invalid set number %d\n", i); 2475 masks[which] |= (1<<i); 2476 } else if (_substrcmp(*av, "disable") == 0) 2477 which = 0; 2478 else if (_substrcmp(*av, "enable") == 0) 2479 which = 1; 2480 else 2481 errx(EX_DATAERR, 2482 "invalid set command %s\n", *av); 2483 av++; 2484 } 2485 if ( (masks[0] & masks[1]) != 0 ) 2486 errx(EX_DATAERR, 2487 "cannot enable and disable the same set\n"); 2488 2489 rt.set = masks[0]; 2490 rt.new_set = masks[1]; 2491 i = do_range_cmd(IP_FW_SET_ENABLE, &rt); 2492 if (i) 2493 warn("set enable/disable: setsockopt(IP_FW_SET_ENABLE)"); 2494 } else 2495 errx(EX_USAGE, "invalid set command %s\n", *av); 2496 } 2497 2498 void 2499 ipfw_sysctl_handler(char *av[], int which) 2500 { 2501 av++; 2502 2503 if (av[0] == NULL) { 2504 warnx("missing keyword to enable/disable\n"); 2505 } else if (_substrcmp(*av, "firewall") == 0) { 2506 sysctlbyname("net.inet.ip.fw.enable", NULL, 0, 2507 &which, sizeof(which)); 2508 sysctlbyname("net.inet6.ip6.fw.enable", NULL, 0, 2509 &which, sizeof(which)); 2510 } else if (_substrcmp(*av, "one_pass") == 0) { 2511 sysctlbyname("net.inet.ip.fw.one_pass", NULL, 0, 2512 &which, sizeof(which)); 2513 } else if (_substrcmp(*av, "debug") == 0) { 2514 sysctlbyname("net.inet.ip.fw.debug", NULL, 0, 2515 &which, sizeof(which)); 2516 } else if (_substrcmp(*av, "verbose") == 0) { 2517 sysctlbyname("net.inet.ip.fw.verbose", NULL, 0, 2518 &which, sizeof(which)); 2519 } else if (_substrcmp(*av, "dyn_keepalive") == 0) { 2520 sysctlbyname("net.inet.ip.fw.dyn_keepalive", NULL, 0, 2521 &which, sizeof(which)); 2522 #ifndef NO_ALTQ 2523 } else if (_substrcmp(*av, "altq") == 0) { 2524 altq_set_enabled(which); 2525 #endif 2526 } else { 2527 warnx("unrecognize enable/disable keyword: %s\n", *av); 2528 } 2529 } 2530 2531 typedef void state_cb(struct cmdline_opts *co, struct format_opts *fo, 2532 void *arg, void *state); 2533 2534 static void 2535 prepare_format_dyn(struct cmdline_opts *co, struct format_opts *fo, 2536 void *arg __unused, void *_state) 2537 { 2538 ipfw_dyn_rule *d; 2539 int width; 2540 uint8_t set; 2541 2542 d = (ipfw_dyn_rule *)_state; 2543 /* Count _ALL_ states */ 2544 fo->dcnt++; 2545 2546 if (fo->show_counters == 0) 2547 return; 2548 2549 if (co->use_set) { 2550 /* skip states from another set */ 2551 bcopy((char *)&d->rule + sizeof(uint16_t), &set, 2552 sizeof(uint8_t)); 2553 if (set != co->use_set - 1) 2554 return; 2555 } 2556 2557 width = pr_u64(NULL, &d->pcnt, 0); 2558 if (width > fo->pcwidth) 2559 fo->pcwidth = width; 2560 2561 width = pr_u64(NULL, &d->bcnt, 0); 2562 if (width > fo->bcwidth) 2563 fo->bcwidth = width; 2564 } 2565 2566 static int 2567 foreach_state(struct cmdline_opts *co, struct format_opts *fo, 2568 caddr_t base, size_t sz, state_cb dyn_bc, void *dyn_arg) 2569 { 2570 int ttype; 2571 state_cb *fptr; 2572 void *farg; 2573 ipfw_obj_tlv *tlv; 2574 ipfw_obj_ctlv *ctlv; 2575 2576 fptr = NULL; 2577 ttype = 0; 2578 2579 while (sz > 0) { 2580 ctlv = (ipfw_obj_ctlv *)base; 2581 switch (ctlv->head.type) { 2582 case IPFW_TLV_DYNSTATE_LIST: 2583 base += sizeof(*ctlv); 2584 sz -= sizeof(*ctlv); 2585 ttype = IPFW_TLV_DYN_ENT; 2586 fptr = dyn_bc; 2587 farg = dyn_arg; 2588 break; 2589 default: 2590 return (sz); 2591 } 2592 2593 while (sz > 0) { 2594 tlv = (ipfw_obj_tlv *)base; 2595 if (tlv->type != ttype) 2596 break; 2597 2598 fptr(co, fo, farg, tlv + 1); 2599 sz -= tlv->length; 2600 base += tlv->length; 2601 } 2602 } 2603 2604 return (sz); 2605 } 2606 2607 static void 2608 prepare_format_opts(struct cmdline_opts *co, struct format_opts *fo, 2609 ipfw_obj_tlv *rtlv, int rcnt, caddr_t dynbase, size_t dynsz) 2610 { 2611 int bcwidth, pcwidth, width; 2612 int n; 2613 struct ip_fw_bcounter *cntr; 2614 struct ip_fw_rule *r; 2615 2616 bcwidth = 0; 2617 pcwidth = 0; 2618 if (fo->show_counters != 0) { 2619 for (n = 0; n < rcnt; n++, 2620 rtlv = (ipfw_obj_tlv *)((caddr_t)rtlv + rtlv->length)) { 2621 cntr = (struct ip_fw_bcounter *)(rtlv + 1); 2622 r = (struct ip_fw_rule *)((caddr_t)cntr + cntr->size); 2623 /* skip rules from another set */ 2624 if (co->use_set && r->set != co->use_set - 1) 2625 continue; 2626 2627 /* packet counter */ 2628 width = pr_u64(NULL, &cntr->pcnt, 0); 2629 if (width > pcwidth) 2630 pcwidth = width; 2631 2632 /* byte counter */ 2633 width = pr_u64(NULL, &cntr->bcnt, 0); 2634 if (width > bcwidth) 2635 bcwidth = width; 2636 } 2637 } 2638 fo->bcwidth = bcwidth; 2639 fo->pcwidth = pcwidth; 2640 2641 fo->dcnt = 0; 2642 if (co->do_dynamic && dynsz > 0) 2643 foreach_state(co, fo, dynbase, dynsz, prepare_format_dyn, NULL); 2644 } 2645 2646 static int 2647 list_static_range(struct cmdline_opts *co, struct format_opts *fo, 2648 struct buf_pr *bp, ipfw_obj_tlv *rtlv, int rcnt) 2649 { 2650 int n, seen; 2651 struct ip_fw_rule *r; 2652 struct ip_fw_bcounter *cntr; 2653 int c = 0; 2654 2655 for (n = seen = 0; n < rcnt; n++, 2656 rtlv = (ipfw_obj_tlv *)((caddr_t)rtlv + rtlv->length)) { 2657 2658 if ((fo->show_counters | fo->show_time) != 0) { 2659 cntr = (struct ip_fw_bcounter *)(rtlv + 1); 2660 r = (struct ip_fw_rule *)((caddr_t)cntr + cntr->size); 2661 } else { 2662 cntr = NULL; 2663 r = (struct ip_fw_rule *)(rtlv + 1); 2664 } 2665 if (r->rulenum > fo->last) 2666 break; 2667 if (co->use_set && r->set != co->use_set - 1) 2668 continue; 2669 if (r->rulenum >= fo->first && r->rulenum <= fo->last) { 2670 show_static_rule(co, fo, bp, r, cntr); 2671 printf("%s", bp->buf); 2672 c += rtlv->length; 2673 bp_flush(bp); 2674 seen++; 2675 } 2676 } 2677 2678 return (seen); 2679 } 2680 2681 static void 2682 list_dyn_state(struct cmdline_opts *co, struct format_opts *fo, 2683 void *_arg, void *_state) 2684 { 2685 uint16_t rulenum; 2686 uint8_t set; 2687 ipfw_dyn_rule *d; 2688 struct buf_pr *bp; 2689 2690 d = (ipfw_dyn_rule *)_state; 2691 bp = (struct buf_pr *)_arg; 2692 2693 bcopy(&d->rule, &rulenum, sizeof(rulenum)); 2694 if (rulenum > fo->last) 2695 return; 2696 if (co->use_set) { 2697 bcopy((char *)&d->rule + sizeof(uint16_t), 2698 &set, sizeof(uint8_t)); 2699 if (set != co->use_set - 1) 2700 return; 2701 } 2702 if (rulenum >= fo->first) { 2703 show_dyn_state(co, fo, bp, d); 2704 printf("%s\n", bp->buf); 2705 bp_flush(bp); 2706 } 2707 } 2708 2709 static int 2710 list_dyn_range(struct cmdline_opts *co, struct format_opts *fo, 2711 struct buf_pr *bp, caddr_t base, size_t sz) 2712 { 2713 2714 sz = foreach_state(co, fo, base, sz, list_dyn_state, bp); 2715 return (sz); 2716 } 2717 2718 void 2719 ipfw_list(int ac, char *av[], int show_counters) 2720 { 2721 ipfw_cfg_lheader *cfg; 2722 struct format_opts sfo; 2723 size_t sz; 2724 int error; 2725 int lac; 2726 char **lav; 2727 uint32_t rnum; 2728 char *endptr; 2729 2730 if (g_co.test_only) { 2731 fprintf(stderr, "Testing only, list disabled\n"); 2732 return; 2733 } 2734 if (g_co.do_pipe) { 2735 dummynet_list(ac, av, show_counters); 2736 return; 2737 } 2738 2739 ac--; 2740 av++; 2741 memset(&sfo, 0, sizeof(sfo)); 2742 2743 /* Determine rule range to request */ 2744 if (ac > 0) { 2745 for (lac = ac, lav = av; lac != 0; lac--) { 2746 rnum = strtoul(*lav++, &endptr, 10); 2747 if (sfo.first == 0 || rnum < sfo.first) 2748 sfo.first = rnum; 2749 2750 if (*endptr == '-') 2751 rnum = strtoul(endptr + 1, &endptr, 10); 2752 if (sfo.last == 0 || rnum > sfo.last) 2753 sfo.last = rnum; 2754 } 2755 } 2756 2757 /* get configuraion from kernel */ 2758 cfg = NULL; 2759 sfo.show_counters = show_counters; 2760 sfo.show_time = g_co.do_time; 2761 if (g_co.do_dynamic != 2) 2762 sfo.flags |= IPFW_CFG_GET_STATIC; 2763 if (g_co.do_dynamic != 0) 2764 sfo.flags |= IPFW_CFG_GET_STATES; 2765 if ((sfo.show_counters | sfo.show_time) != 0) 2766 sfo.flags |= IPFW_CFG_GET_COUNTERS; 2767 if (ipfw_get_config(&g_co, &sfo, &cfg, &sz) != 0) 2768 err(EX_OSERR, "retrieving config failed"); 2769 2770 error = ipfw_show_config(&g_co, &sfo, cfg, sz, ac, av); 2771 2772 free(cfg); 2773 2774 if (error != EX_OK) 2775 exit(error); 2776 } 2777 2778 static int 2779 ipfw_show_config(struct cmdline_opts *co, struct format_opts *fo, 2780 ipfw_cfg_lheader *cfg, size_t sz, int ac, char *av[]) 2781 { 2782 caddr_t dynbase; 2783 size_t dynsz; 2784 int rcnt; 2785 int exitval = EX_OK; 2786 int lac; 2787 char **lav; 2788 char *endptr; 2789 size_t readsz; 2790 struct buf_pr bp; 2791 ipfw_obj_ctlv *ctlv, *tstate; 2792 ipfw_obj_tlv *rbase; 2793 2794 /* 2795 * Handle tablenames TLV first, if any 2796 */ 2797 tstate = NULL; 2798 rbase = NULL; 2799 dynbase = NULL; 2800 dynsz = 0; 2801 readsz = sizeof(*cfg); 2802 rcnt = 0; 2803 2804 fo->set_mask = cfg->set_mask; 2805 2806 ctlv = (ipfw_obj_ctlv *)(cfg + 1); 2807 if (ctlv->head.type == IPFW_TLV_TBLNAME_LIST) { 2808 object_sort_ctlv(ctlv); 2809 fo->tstate = ctlv; 2810 readsz += ctlv->head.length; 2811 ctlv = (ipfw_obj_ctlv *)((caddr_t)ctlv + ctlv->head.length); 2812 } 2813 2814 if (cfg->flags & IPFW_CFG_GET_STATIC) { 2815 /* We've requested static rules */ 2816 if (ctlv->head.type == IPFW_TLV_RULE_LIST) { 2817 rbase = (ipfw_obj_tlv *)(ctlv + 1); 2818 rcnt = ctlv->count; 2819 readsz += ctlv->head.length; 2820 ctlv = (ipfw_obj_ctlv *)((caddr_t)ctlv + 2821 ctlv->head.length); 2822 } 2823 } 2824 2825 if ((cfg->flags & IPFW_CFG_GET_STATES) && (readsz != sz)) { 2826 /* We may have some dynamic states */ 2827 dynsz = sz - readsz; 2828 /* Skip empty header */ 2829 if (dynsz != sizeof(ipfw_obj_ctlv)) 2830 dynbase = (caddr_t)ctlv; 2831 else 2832 dynsz = 0; 2833 } 2834 2835 prepare_format_opts(co, fo, rbase, rcnt, dynbase, dynsz); 2836 bp_alloc(&bp, 4096); 2837 2838 /* if no rule numbers were specified, list all rules */ 2839 if (ac == 0) { 2840 fo->first = 0; 2841 fo->last = IPFW_DEFAULT_RULE; 2842 if (cfg->flags & IPFW_CFG_GET_STATIC) 2843 list_static_range(co, fo, &bp, rbase, rcnt); 2844 2845 if (co->do_dynamic && dynsz > 0) { 2846 printf("## Dynamic rules (%d %zu):\n", fo->dcnt, 2847 dynsz); 2848 list_dyn_range(co, fo, &bp, dynbase, dynsz); 2849 } 2850 2851 bp_free(&bp); 2852 return (EX_OK); 2853 } 2854 2855 /* display specific rules requested on command line */ 2856 for (lac = ac, lav = av; lac != 0; lac--) { 2857 /* convert command line rule # */ 2858 fo->last = fo->first = strtoul(*lav++, &endptr, 10); 2859 if (*endptr == '-') 2860 fo->last = strtoul(endptr + 1, &endptr, 10); 2861 if (*endptr) { 2862 exitval = EX_USAGE; 2863 warnx("invalid rule number: %s", *(lav - 1)); 2864 continue; 2865 } 2866 2867 if ((cfg->flags & IPFW_CFG_GET_STATIC) == 0) 2868 continue; 2869 2870 if (list_static_range(co, fo, &bp, rbase, rcnt) == 0) { 2871 /* give precedence to other error(s) */ 2872 if (exitval == EX_OK) 2873 exitval = EX_UNAVAILABLE; 2874 if (fo->first == fo->last) 2875 warnx("rule %u does not exist", fo->first); 2876 else 2877 warnx("no rules in range %u-%u", 2878 fo->first, fo->last); 2879 } 2880 } 2881 2882 if (co->do_dynamic && dynsz > 0) { 2883 printf("## Dynamic rules:\n"); 2884 for (lac = ac, lav = av; lac != 0; lac--) { 2885 fo->last = fo->first = strtoul(*lav++, &endptr, 10); 2886 if (*endptr == '-') 2887 fo->last = strtoul(endptr+1, &endptr, 10); 2888 if (*endptr) 2889 /* already warned */ 2890 continue; 2891 list_dyn_range(co, fo, &bp, dynbase, dynsz); 2892 } 2893 } 2894 2895 bp_free(&bp); 2896 return (exitval); 2897 } 2898 2899 2900 /* 2901 * Retrieves current ipfw configuration of given type 2902 * and stores its pointer to @pcfg. 2903 * 2904 * Caller is responsible for freeing @pcfg. 2905 * 2906 * Returns 0 on success. 2907 */ 2908 2909 static int 2910 ipfw_get_config(struct cmdline_opts *co, struct format_opts *fo, 2911 ipfw_cfg_lheader **pcfg, size_t *psize) 2912 { 2913 ipfw_cfg_lheader *cfg; 2914 size_t sz; 2915 int i; 2916 2917 2918 if (co->test_only != 0) { 2919 fprintf(stderr, "Testing only, list disabled\n"); 2920 return (0); 2921 } 2922 2923 /* Start with some data size */ 2924 sz = 4096; 2925 cfg = NULL; 2926 2927 for (i = 0; i < 16; i++) { 2928 if (cfg != NULL) 2929 free(cfg); 2930 if ((cfg = calloc(1, sz)) == NULL) 2931 return (ENOMEM); 2932 2933 cfg->flags = fo->flags; 2934 cfg->start_rule = fo->first; 2935 cfg->end_rule = fo->last; 2936 2937 if (do_get3(IP_FW_XGET, &cfg->opheader, &sz) != 0) { 2938 if (errno != ENOMEM) { 2939 free(cfg); 2940 return (errno); 2941 } 2942 2943 /* Buffer size is not enough. Try to increase */ 2944 sz = sz * 2; 2945 if (sz < cfg->size) 2946 sz = cfg->size; 2947 continue; 2948 } 2949 2950 *pcfg = cfg; 2951 *psize = sz; 2952 return (0); 2953 } 2954 2955 free(cfg); 2956 return (ENOMEM); 2957 } 2958 2959 static int 2960 lookup_host (char *host, struct in_addr *ipaddr) 2961 { 2962 struct hostent *he; 2963 2964 if (!inet_aton(host, ipaddr)) { 2965 if ((he = gethostbyname(host)) == NULL) 2966 return(-1); 2967 *ipaddr = *(struct in_addr *)he->h_addr_list[0]; 2968 } 2969 return(0); 2970 } 2971 2972 struct tidx { 2973 ipfw_obj_ntlv *idx; 2974 uint32_t count; 2975 uint32_t size; 2976 uint16_t counter; 2977 uint8_t set; 2978 }; 2979 2980 int 2981 ipfw_check_object_name(const char *name) 2982 { 2983 int c, i, l; 2984 2985 /* 2986 * Check that name is null-terminated and contains 2987 * valid symbols only. Valid mask is: 2988 * [a-zA-Z0-9\-_\.]{1,63} 2989 */ 2990 l = strlen(name); 2991 if (l == 0 || l >= 64) 2992 return (EINVAL); 2993 for (i = 0; i < l; i++) { 2994 c = name[i]; 2995 if (isalpha(c) || isdigit(c) || c == '_' || 2996 c == '-' || c == '.') 2997 continue; 2998 return (EINVAL); 2999 } 3000 return (0); 3001 } 3002 3003 static const char *default_state_name = "default"; 3004 3005 static int 3006 state_check_name(const char *name) 3007 { 3008 3009 if (ipfw_check_object_name(name) != 0) 3010 return (EINVAL); 3011 if (strcmp(name, "any") == 0) 3012 return (EINVAL); 3013 return (0); 3014 } 3015 3016 static int 3017 eaction_check_name(const char *name) 3018 { 3019 3020 if (ipfw_check_object_name(name) != 0) 3021 return (EINVAL); 3022 /* Restrict some 'special' names */ 3023 if (match_token(rule_actions, name) != -1 && 3024 match_token(rule_action_params, name) != -1) 3025 return (EINVAL); 3026 return (0); 3027 } 3028 3029 static uint16_t 3030 pack_object(struct tidx *tstate, const char *name, int otype) 3031 { 3032 ipfw_obj_ntlv *ntlv; 3033 uint32_t i; 3034 3035 for (i = 0; i < tstate->count; i++) { 3036 if (strcmp(tstate->idx[i].name, name) != 0) 3037 continue; 3038 if (tstate->idx[i].set != tstate->set) 3039 continue; 3040 if (tstate->idx[i].head.type != otype) 3041 continue; 3042 3043 return (tstate->idx[i].idx); 3044 } 3045 3046 if (tstate->count + 1 > tstate->size) { 3047 tstate->size += 4; 3048 tstate->idx = realloc(tstate->idx, tstate->size * 3049 sizeof(ipfw_obj_ntlv)); 3050 if (tstate->idx == NULL) 3051 return (0); 3052 } 3053 3054 ntlv = &tstate->idx[i]; 3055 memset(ntlv, 0, sizeof(ipfw_obj_ntlv)); 3056 strlcpy(ntlv->name, name, sizeof(ntlv->name)); 3057 ntlv->head.type = otype; 3058 ntlv->head.length = sizeof(ipfw_obj_ntlv); 3059 ntlv->set = tstate->set; 3060 ntlv->idx = ++tstate->counter; 3061 tstate->count++; 3062 3063 return (ntlv->idx); 3064 } 3065 3066 static uint16_t 3067 pack_table(struct tidx *tstate, const char *name) 3068 { 3069 3070 if (table_check_name(name) != 0) 3071 return (0); 3072 3073 return (pack_object(tstate, name, IPFW_TLV_TBL_NAME)); 3074 } 3075 3076 void 3077 fill_table(struct _ipfw_insn *cmd, char *av, uint8_t opcode, 3078 struct tidx *tstate) 3079 { 3080 uint32_t *d = ((ipfw_insn_u32 *)cmd)->d; 3081 uint16_t uidx; 3082 char *p; 3083 3084 if ((p = strchr(av + 6, ')')) == NULL) 3085 errx(EX_DATAERR, "forgotten parenthesis: '%s'", av); 3086 *p = '\0'; 3087 p = strchr(av + 6, ','); 3088 if (p) 3089 *p++ = '\0'; 3090 3091 if ((uidx = pack_table(tstate, av + 6)) == 0) 3092 errx(EX_DATAERR, "Invalid table name: %s", av + 6); 3093 3094 cmd->opcode = opcode; 3095 cmd->arg1 = uidx; 3096 if (p) { 3097 cmd->len |= F_INSN_SIZE(ipfw_insn_u32); 3098 d[0] = strtoul(p, NULL, 0); 3099 } else 3100 cmd->len |= F_INSN_SIZE(ipfw_insn); 3101 } 3102 3103 3104 /* 3105 * fills the addr and mask fields in the instruction as appropriate from av. 3106 * Update length as appropriate. 3107 * The following formats are allowed: 3108 * me returns O_IP_*_ME 3109 * 1.2.3.4 single IP address 3110 * 1.2.3.4:5.6.7.8 address:mask 3111 * 1.2.3.4/24 address/mask 3112 * 1.2.3.4/26{1,6,5,4,23} set of addresses in a subnet 3113 * We can have multiple comma-separated address/mask entries. 3114 */ 3115 static void 3116 fill_ip(ipfw_insn_ip *cmd, char *av, int cblen, struct tidx *tstate) 3117 { 3118 int len = 0; 3119 uint32_t *d = ((ipfw_insn_u32 *)cmd)->d; 3120 3121 cmd->o.len &= ~F_LEN_MASK; /* zero len */ 3122 3123 if (_substrcmp(av, "any") == 0) 3124 return; 3125 3126 if (_substrcmp(av, "me") == 0) { 3127 cmd->o.len |= F_INSN_SIZE(ipfw_insn); 3128 return; 3129 } 3130 3131 if (strncmp(av, "table(", 6) == 0) { 3132 fill_table(&cmd->o, av, O_IP_DST_LOOKUP, tstate); 3133 return; 3134 } 3135 3136 while (av) { 3137 /* 3138 * After the address we can have '/' or ':' indicating a mask, 3139 * ',' indicating another address follows, '{' indicating a 3140 * set of addresses of unspecified size. 3141 */ 3142 char *t = NULL, *p = strpbrk(av, "/:,{"); 3143 int masklen; 3144 char md, nd = '\0'; 3145 3146 CHECK_LENGTH(cblen, (int)F_INSN_SIZE(ipfw_insn) + 2 + len); 3147 3148 if (p) { 3149 md = *p; 3150 *p++ = '\0'; 3151 if ((t = strpbrk(p, ",{")) != NULL) { 3152 nd = *t; 3153 *t = '\0'; 3154 } 3155 } else 3156 md = '\0'; 3157 3158 if (lookup_host(av, (struct in_addr *)&d[0]) != 0) 3159 errx(EX_NOHOST, "hostname ``%s'' unknown", av); 3160 switch (md) { 3161 case ':': 3162 if (!inet_aton(p, (struct in_addr *)&d[1])) 3163 errx(EX_DATAERR, "bad netmask ``%s''", p); 3164 break; 3165 case '/': 3166 masklen = atoi(p); 3167 if (masklen == 0) 3168 d[1] = htonl(0U); /* mask */ 3169 else if (masklen > 32) 3170 errx(EX_DATAERR, "bad width ``%s''", p); 3171 else 3172 d[1] = htonl(~0U << (32 - masklen)); 3173 break; 3174 case '{': /* no mask, assume /24 and put back the '{' */ 3175 d[1] = htonl(~0U << (32 - 24)); 3176 *(--p) = md; 3177 break; 3178 3179 case ',': /* single address plus continuation */ 3180 *(--p) = md; 3181 /* FALLTHROUGH */ 3182 case 0: /* initialization value */ 3183 default: 3184 d[1] = htonl(~0U); /* force /32 */ 3185 break; 3186 } 3187 d[0] &= d[1]; /* mask base address with mask */ 3188 if (t) 3189 *t = nd; 3190 /* find next separator */ 3191 if (p) 3192 p = strpbrk(p, ",{"); 3193 if (p && *p == '{') { 3194 /* 3195 * We have a set of addresses. They are stored as follows: 3196 * arg1 is the set size (powers of 2, 2..256) 3197 * addr is the base address IN HOST FORMAT 3198 * mask.. is an array of arg1 bits (rounded up to 3199 * the next multiple of 32) with bits set 3200 * for each host in the map. 3201 */ 3202 uint32_t *map = (uint32_t *)&cmd->mask; 3203 int low, high; 3204 int i = contigmask((uint8_t *)&(d[1]), 32); 3205 3206 if (len > 0) 3207 errx(EX_DATAERR, "address set cannot be in a list"); 3208 if (i < 24 || i > 31) 3209 errx(EX_DATAERR, "invalid set with mask %d\n", i); 3210 cmd->o.arg1 = 1<<(32-i); /* map length */ 3211 d[0] = ntohl(d[0]); /* base addr in host format */ 3212 cmd->o.opcode = O_IP_DST_SET; /* default */ 3213 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32) + (cmd->o.arg1+31)/32; 3214 for (i = 0; i < (cmd->o.arg1+31)/32 ; i++) 3215 map[i] = 0; /* clear map */ 3216 3217 av = p + 1; 3218 low = d[0] & 0xff; 3219 high = low + cmd->o.arg1 - 1; 3220 /* 3221 * Here, i stores the previous value when we specify a range 3222 * of addresses within a mask, e.g. 45-63. i = -1 means we 3223 * have no previous value. 3224 */ 3225 i = -1; /* previous value in a range */ 3226 while (isdigit(*av)) { 3227 char *s; 3228 int a = strtol(av, &s, 0); 3229 3230 if (s == av) { /* no parameter */ 3231 if (*av != '}') 3232 errx(EX_DATAERR, "set not closed\n"); 3233 if (i != -1) 3234 errx(EX_DATAERR, "incomplete range %d-", i); 3235 break; 3236 } 3237 if (a < low || a > high) 3238 errx(EX_DATAERR, "addr %d out of range [%d-%d]\n", 3239 a, low, high); 3240 a -= low; 3241 if (i == -1) /* no previous in range */ 3242 i = a; 3243 else { /* check that range is valid */ 3244 if (i > a) 3245 errx(EX_DATAERR, "invalid range %d-%d", 3246 i+low, a+low); 3247 if (*s == '-') 3248 errx(EX_DATAERR, "double '-' in range"); 3249 } 3250 for (; i <= a; i++) 3251 map[i/32] |= 1<<(i & 31); 3252 i = -1; 3253 if (*s == '-') 3254 i = a; 3255 else if (*s == '}') 3256 break; 3257 av = s+1; 3258 } 3259 return; 3260 } 3261 av = p; 3262 if (av) /* then *av must be a ',' */ 3263 av++; 3264 3265 /* Check this entry */ 3266 if (d[1] == 0) { /* "any", specified as x.x.x.x/0 */ 3267 /* 3268 * 'any' turns the entire list into a NOP. 3269 * 'not any' never matches, so it is removed from the 3270 * list unless it is the only item, in which case we 3271 * report an error. 3272 */ 3273 if (cmd->o.len & F_NOT) { /* "not any" never matches */ 3274 if (av == NULL && len == 0) /* only this entry */ 3275 errx(EX_DATAERR, "not any never matches"); 3276 } 3277 /* else do nothing and skip this entry */ 3278 return; 3279 } 3280 /* A single IP can be stored in an optimized format */ 3281 if (d[1] == (uint32_t)~0 && av == NULL && len == 0) { 3282 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32); 3283 return; 3284 } 3285 len += 2; /* two words... */ 3286 d += 2; 3287 } /* end while */ 3288 if (len + 1 > F_LEN_MASK) 3289 errx(EX_DATAERR, "address list too long"); 3290 cmd->o.len |= len+1; 3291 } 3292 3293 3294 /* n2mask sets n bits of the mask */ 3295 void 3296 n2mask(struct in6_addr *mask, int n) 3297 { 3298 static int minimask[9] = 3299 { 0x00, 0x80, 0xc0, 0xe0, 0xf0, 0xf8, 0xfc, 0xfe, 0xff }; 3300 u_char *p; 3301 3302 memset(mask, 0, sizeof(struct in6_addr)); 3303 p = (u_char *) mask; 3304 for (; n > 0; p++, n -= 8) { 3305 if (n >= 8) 3306 *p = 0xff; 3307 else 3308 *p = minimask[n]; 3309 } 3310 return; 3311 } 3312 3313 static void 3314 fill_flags_cmd(ipfw_insn *cmd, enum ipfw_opcodes opcode, 3315 struct _s_x *flags, char *p) 3316 { 3317 char *e; 3318 uint32_t set = 0, clear = 0; 3319 3320 if (fill_flags(flags, p, &e, &set, &clear) != 0) 3321 errx(EX_DATAERR, "invalid flag %s", e); 3322 3323 cmd->opcode = opcode; 3324 cmd->len = (cmd->len & (F_NOT | F_OR)) | 1; 3325 cmd->arg1 = (set & 0xff) | ( (clear & 0xff) << 8); 3326 } 3327 3328 3329 void 3330 ipfw_delete(char *av[]) 3331 { 3332 ipfw_range_tlv rt; 3333 char *sep; 3334 int i, j; 3335 int exitval = EX_OK; 3336 int do_set = 0; 3337 3338 av++; 3339 NEED1("missing rule specification"); 3340 if ( *av && _substrcmp(*av, "set") == 0) { 3341 /* Do not allow using the following syntax: 3342 * ipfw set N delete set M 3343 */ 3344 if (g_co.use_set) 3345 errx(EX_DATAERR, "invalid syntax"); 3346 do_set = 1; /* delete set */ 3347 av++; 3348 } 3349 3350 /* Rule number */ 3351 while (*av && isdigit(**av)) { 3352 i = strtol(*av, &sep, 10); 3353 j = i; 3354 if (*sep== '-') 3355 j = strtol(sep + 1, NULL, 10); 3356 av++; 3357 if (g_co.do_nat) { 3358 exitval = ipfw_delete_nat(i); 3359 } else if (g_co.do_pipe) { 3360 exitval = ipfw_delete_pipe(g_co.do_pipe, i); 3361 } else { 3362 memset(&rt, 0, sizeof(rt)); 3363 if (do_set != 0) { 3364 rt.set = i & 31; 3365 rt.flags = IPFW_RCFLAG_SET; 3366 } else { 3367 rt.start_rule = i & 0xffff; 3368 rt.end_rule = j & 0xffff; 3369 if (rt.start_rule == 0 && rt.end_rule == 0) 3370 rt.flags |= IPFW_RCFLAG_ALL; 3371 else 3372 rt.flags |= IPFW_RCFLAG_RANGE; 3373 if (g_co.use_set != 0) { 3374 rt.set = g_co.use_set - 1; 3375 rt.flags |= IPFW_RCFLAG_SET; 3376 } 3377 } 3378 if (g_co.do_dynamic == 2) 3379 rt.flags |= IPFW_RCFLAG_DYNAMIC; 3380 i = do_range_cmd(IP_FW_XDEL, &rt); 3381 if (i != 0) { 3382 exitval = EX_UNAVAILABLE; 3383 if (g_co.do_quiet) 3384 continue; 3385 warn("rule %u: setsockopt(IP_FW_XDEL)", 3386 rt.start_rule); 3387 } else if (rt.new_set == 0 && do_set == 0 && 3388 g_co.do_dynamic != 2) { 3389 exitval = EX_UNAVAILABLE; 3390 if (g_co.do_quiet) 3391 continue; 3392 if (rt.start_rule != rt.end_rule) 3393 warnx("no rules rules in %u-%u range", 3394 rt.start_rule, rt.end_rule); 3395 else 3396 warnx("rule %u not found", 3397 rt.start_rule); 3398 } 3399 } 3400 } 3401 if (exitval != EX_OK && g_co.do_force == 0) 3402 exit(exitval); 3403 } 3404 3405 3406 /* 3407 * fill the interface structure. We do not check the name as we can 3408 * create interfaces dynamically, so checking them at insert time 3409 * makes relatively little sense. 3410 * Interface names containing '*', '?', or '[' are assumed to be shell 3411 * patterns which match interfaces. 3412 */ 3413 static void 3414 fill_iface(ipfw_insn_if *cmd, char *arg, int cblen, struct tidx *tstate) 3415 { 3416 char *p; 3417 uint16_t uidx; 3418 3419 cmd->name[0] = '\0'; 3420 cmd->o.len |= F_INSN_SIZE(ipfw_insn_if); 3421 3422 CHECK_CMDLEN; 3423 3424 /* Parse the interface or address */ 3425 if (strcmp(arg, "any") == 0) 3426 cmd->o.len = 0; /* effectively ignore this command */ 3427 else if (strncmp(arg, "table(", 6) == 0) { 3428 if ((p = strchr(arg + 6, ')')) == NULL) 3429 errx(EX_DATAERR, "forgotten parenthesis: '%s'", arg); 3430 *p = '\0'; 3431 p = strchr(arg + 6, ','); 3432 if (p) 3433 *p++ = '\0'; 3434 if ((uidx = pack_table(tstate, arg + 6)) == 0) 3435 errx(EX_DATAERR, "Invalid table name: %s", arg + 6); 3436 3437 cmd->name[0] = '\1'; /* Special value indicating table */ 3438 cmd->p.kidx = uidx; 3439 } else if (!isdigit(*arg)) { 3440 strlcpy(cmd->name, arg, sizeof(cmd->name)); 3441 cmd->p.glob = strpbrk(arg, "*?[") != NULL ? 1 : 0; 3442 } else if (!inet_aton(arg, &cmd->p.ip)) 3443 errx(EX_DATAERR, "bad ip address ``%s''", arg); 3444 } 3445 3446 static void 3447 get_mac_addr_mask(const char *p, uint8_t *addr, uint8_t *mask) 3448 { 3449 int i; 3450 size_t l; 3451 char *ap, *ptr, *optr; 3452 struct ether_addr *mac; 3453 const char *macset = "0123456789abcdefABCDEF:"; 3454 3455 if (strcmp(p, "any") == 0) { 3456 for (i = 0; i < ETHER_ADDR_LEN; i++) 3457 addr[i] = mask[i] = 0; 3458 return; 3459 } 3460 3461 optr = ptr = strdup(p); 3462 if ((ap = strsep(&ptr, "&/")) != NULL && *ap != 0) { 3463 l = strlen(ap); 3464 if (strspn(ap, macset) != l || (mac = ether_aton(ap)) == NULL) 3465 errx(EX_DATAERR, "Incorrect MAC address"); 3466 bcopy(mac, addr, ETHER_ADDR_LEN); 3467 } else 3468 errx(EX_DATAERR, "Incorrect MAC address"); 3469 3470 if (ptr != NULL) { /* we have mask? */ 3471 if (p[ptr - optr - 1] == '/') { /* mask len */ 3472 long ml = strtol(ptr, &ap, 10); 3473 if (*ap != 0 || ml > ETHER_ADDR_LEN * 8 || ml < 0) 3474 errx(EX_DATAERR, "Incorrect mask length"); 3475 for (i = 0; ml > 0 && i < ETHER_ADDR_LEN; ml -= 8, i++) 3476 mask[i] = (ml >= 8) ? 0xff: (~0) << (8 - ml); 3477 } else { /* mask */ 3478 l = strlen(ptr); 3479 if (strspn(ptr, macset) != l || 3480 (mac = ether_aton(ptr)) == NULL) 3481 errx(EX_DATAERR, "Incorrect mask"); 3482 bcopy(mac, mask, ETHER_ADDR_LEN); 3483 } 3484 } else { /* default mask: ff:ff:ff:ff:ff:ff */ 3485 for (i = 0; i < ETHER_ADDR_LEN; i++) 3486 mask[i] = 0xff; 3487 } 3488 for (i = 0; i < ETHER_ADDR_LEN; i++) 3489 addr[i] &= mask[i]; 3490 3491 free(optr); 3492 } 3493 3494 /* 3495 * helper function, updates the pointer to cmd with the length 3496 * of the current command, and also cleans up the first word of 3497 * the new command in case it has been clobbered before. 3498 */ 3499 static ipfw_insn * 3500 next_cmd(ipfw_insn *cmd, int *len) 3501 { 3502 *len -= F_LEN(cmd); 3503 CHECK_LENGTH(*len, 0); 3504 cmd += F_LEN(cmd); 3505 bzero(cmd, sizeof(*cmd)); 3506 return cmd; 3507 } 3508 3509 /* 3510 * Takes arguments and copies them into a comment 3511 */ 3512 static void 3513 fill_comment(ipfw_insn *cmd, char **av, int cblen) 3514 { 3515 int i, l; 3516 char *p = (char *)(cmd + 1); 3517 3518 cmd->opcode = O_NOP; 3519 cmd->len = (cmd->len & (F_NOT | F_OR)); 3520 3521 /* Compute length of comment string. */ 3522 for (i = 0, l = 0; av[i] != NULL; i++) 3523 l += strlen(av[i]) + 1; 3524 if (l == 0) 3525 return; 3526 if (l > 84) 3527 errx(EX_DATAERR, 3528 "comment too long (max 80 chars)"); 3529 l = 1 + (l+3)/4; 3530 cmd->len = (cmd->len & (F_NOT | F_OR)) | l; 3531 CHECK_CMDLEN; 3532 3533 for (i = 0; av[i] != NULL; i++) { 3534 strcpy(p, av[i]); 3535 p += strlen(av[i]); 3536 *p++ = ' '; 3537 } 3538 *(--p) = '\0'; 3539 } 3540 3541 /* 3542 * A function to fill simple commands of size 1. 3543 * Existing flags are preserved. 3544 */ 3545 static void 3546 fill_cmd(ipfw_insn *cmd, enum ipfw_opcodes opcode, int flags, uint16_t arg) 3547 { 3548 cmd->opcode = opcode; 3549 cmd->len = ((cmd->len | flags) & (F_NOT | F_OR)) | 1; 3550 cmd->arg1 = arg; 3551 } 3552 3553 /* 3554 * Fetch and add the MAC address and type, with masks. This generates one or 3555 * two microinstructions, and returns the pointer to the last one. 3556 */ 3557 static ipfw_insn * 3558 add_mac(ipfw_insn *cmd, char *av[], int cblen) 3559 { 3560 ipfw_insn_mac *mac; 3561 3562 if ( ( av[0] == NULL ) || ( av[1] == NULL ) ) 3563 errx(EX_DATAERR, "MAC dst src"); 3564 3565 cmd->opcode = O_MACADDR2; 3566 cmd->len = (cmd->len & (F_NOT | F_OR)) | F_INSN_SIZE(ipfw_insn_mac); 3567 CHECK_CMDLEN; 3568 3569 mac = (ipfw_insn_mac *)cmd; 3570 get_mac_addr_mask(av[0], mac->addr, mac->mask); /* dst */ 3571 get_mac_addr_mask(av[1], &(mac->addr[ETHER_ADDR_LEN]), 3572 &(mac->mask[ETHER_ADDR_LEN])); /* src */ 3573 return cmd; 3574 } 3575 3576 static ipfw_insn * 3577 add_mactype(ipfw_insn *cmd, char *av, int cblen) 3578 { 3579 if (!av) 3580 errx(EX_DATAERR, "missing MAC type"); 3581 if (strcmp(av, "any") != 0) { /* we have a non-null type */ 3582 fill_newports((ipfw_insn_u16 *)cmd, av, IPPROTO_ETHERTYPE, 3583 cblen); 3584 cmd->opcode = O_MAC_TYPE; 3585 return cmd; 3586 } else 3587 return NULL; 3588 } 3589 3590 static ipfw_insn * 3591 add_proto0(ipfw_insn *cmd, char *av, u_char *protop) 3592 { 3593 struct protoent *pe; 3594 char *ep; 3595 int proto; 3596 3597 proto = strtol(av, &ep, 10); 3598 if (*ep != '\0' || proto <= 0) { 3599 if ((pe = getprotobyname(av)) == NULL) 3600 return NULL; 3601 proto = pe->p_proto; 3602 } 3603 3604 fill_cmd(cmd, O_PROTO, 0, proto); 3605 *protop = proto; 3606 return cmd; 3607 } 3608 3609 static ipfw_insn * 3610 add_proto(ipfw_insn *cmd, char *av, u_char *protop) 3611 { 3612 u_char proto = IPPROTO_IP; 3613 3614 if (_substrcmp(av, "all") == 0 || strcmp(av, "ip") == 0) 3615 ; /* do not set O_IP4 nor O_IP6 */ 3616 else if (strcmp(av, "ip4") == 0) 3617 /* explicit "just IPv4" rule */ 3618 fill_cmd(cmd, O_IP4, 0, 0); 3619 else if (strcmp(av, "ip6") == 0) { 3620 /* explicit "just IPv6" rule */ 3621 proto = IPPROTO_IPV6; 3622 fill_cmd(cmd, O_IP6, 0, 0); 3623 } else 3624 return add_proto0(cmd, av, protop); 3625 3626 *protop = proto; 3627 return cmd; 3628 } 3629 3630 static ipfw_insn * 3631 add_proto_compat(ipfw_insn *cmd, char *av, u_char *protop) 3632 { 3633 u_char proto = IPPROTO_IP; 3634 3635 if (_substrcmp(av, "all") == 0 || strcmp(av, "ip") == 0) 3636 ; /* do not set O_IP4 nor O_IP6 */ 3637 else if (strcmp(av, "ipv4") == 0 || strcmp(av, "ip4") == 0) 3638 /* explicit "just IPv4" rule */ 3639 fill_cmd(cmd, O_IP4, 0, 0); 3640 else if (strcmp(av, "ipv6") == 0 || strcmp(av, "ip6") == 0) { 3641 /* explicit "just IPv6" rule */ 3642 proto = IPPROTO_IPV6; 3643 fill_cmd(cmd, O_IP6, 0, 0); 3644 } else 3645 return add_proto0(cmd, av, protop); 3646 3647 *protop = proto; 3648 return cmd; 3649 } 3650 3651 static ipfw_insn * 3652 add_srcip(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 cmd->opcode = O_IP_SRC_SET; 3657 else if (cmd->opcode == O_IP_DST_LOOKUP) /* table */ 3658 cmd->opcode = O_IP_SRC_LOOKUP; 3659 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn)) /* me */ 3660 cmd->opcode = O_IP_SRC_ME; 3661 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_u32)) /* one IP */ 3662 cmd->opcode = O_IP_SRC; 3663 else /* addr/mask */ 3664 cmd->opcode = O_IP_SRC_MASK; 3665 return cmd; 3666 } 3667 3668 static ipfw_insn * 3669 add_dstip(ipfw_insn *cmd, char *av, int cblen, struct tidx *tstate) 3670 { 3671 fill_ip((ipfw_insn_ip *)cmd, av, cblen, tstate); 3672 if (cmd->opcode == O_IP_DST_SET) /* set */ 3673 ; 3674 else if (cmd->opcode == O_IP_DST_LOOKUP) /* table */ 3675 ; 3676 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn)) /* me */ 3677 cmd->opcode = O_IP_DST_ME; 3678 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_u32)) /* one IP */ 3679 cmd->opcode = O_IP_DST; 3680 else /* addr/mask */ 3681 cmd->opcode = O_IP_DST_MASK; 3682 return cmd; 3683 } 3684 3685 static struct _s_x f_reserved_keywords[] = { 3686 { "altq", TOK_OR }, 3687 { "//", TOK_OR }, 3688 { "diverted", TOK_OR }, 3689 { "dst-port", TOK_OR }, 3690 { "src-port", TOK_OR }, 3691 { "established", TOK_OR }, 3692 { "keep-state", TOK_OR }, 3693 { "frag", TOK_OR }, 3694 { "icmptypes", TOK_OR }, 3695 { "in", TOK_OR }, 3696 { "out", TOK_OR }, 3697 { "ip6", TOK_OR }, 3698 { "any", TOK_OR }, 3699 { "to", TOK_OR }, 3700 { "via", TOK_OR }, 3701 { "{", TOK_OR }, 3702 { NULL, 0 } /* terminator */ 3703 }; 3704 3705 static ipfw_insn * 3706 add_ports(ipfw_insn *cmd, char *av, u_char proto, int opcode, int cblen) 3707 { 3708 3709 if (match_token(f_reserved_keywords, av) != -1) 3710 return (NULL); 3711 3712 if (fill_newports((ipfw_insn_u16 *)cmd, av, proto, cblen)) { 3713 /* XXX todo: check that we have a protocol with ports */ 3714 cmd->opcode = opcode; 3715 return cmd; 3716 } 3717 return NULL; 3718 } 3719 3720 static ipfw_insn * 3721 add_src(ipfw_insn *cmd, char *av, u_char proto, int cblen, struct tidx *tstate) 3722 { 3723 struct in6_addr a; 3724 char *host, *ch, buf[INET6_ADDRSTRLEN]; 3725 ipfw_insn *ret = NULL; 3726 size_t len; 3727 3728 /* Copy first address in set if needed */ 3729 if ((ch = strpbrk(av, "/,")) != NULL) { 3730 len = ch - av; 3731 strlcpy(buf, av, sizeof(buf)); 3732 if (len < sizeof(buf)) 3733 buf[len] = '\0'; 3734 host = buf; 3735 } else 3736 host = av; 3737 3738 if (proto == IPPROTO_IPV6 || strcmp(av, "me6") == 0 || 3739 inet_pton(AF_INET6, host, &a) == 1) 3740 ret = add_srcip6(cmd, av, cblen, tstate); 3741 /* XXX: should check for IPv4, not !IPv6 */ 3742 if (ret == NULL && (proto == IPPROTO_IP || strcmp(av, "me") == 0 || 3743 inet_pton(AF_INET6, host, &a) != 1)) 3744 ret = add_srcip(cmd, av, cblen, tstate); 3745 if (ret == NULL && strcmp(av, "any") != 0) 3746 ret = cmd; 3747 3748 return ret; 3749 } 3750 3751 static ipfw_insn * 3752 add_dst(ipfw_insn *cmd, char *av, u_char proto, int cblen, struct tidx *tstate) 3753 { 3754 struct in6_addr a; 3755 char *host, *ch, buf[INET6_ADDRSTRLEN]; 3756 ipfw_insn *ret = NULL; 3757 size_t len; 3758 3759 /* Copy first address in set if needed */ 3760 if ((ch = strpbrk(av, "/,")) != NULL) { 3761 len = ch - av; 3762 strlcpy(buf, av, sizeof(buf)); 3763 if (len < sizeof(buf)) 3764 buf[len] = '\0'; 3765 host = buf; 3766 } else 3767 host = av; 3768 3769 if (proto == IPPROTO_IPV6 || strcmp(av, "me6") == 0 || 3770 inet_pton(AF_INET6, host, &a) == 1) 3771 ret = add_dstip6(cmd, av, cblen, tstate); 3772 /* XXX: should check for IPv4, not !IPv6 */ 3773 if (ret == NULL && (proto == IPPROTO_IP || strcmp(av, "me") == 0 || 3774 inet_pton(AF_INET6, host, &a) != 1)) 3775 ret = add_dstip(cmd, av, cblen, tstate); 3776 if (ret == NULL && strcmp(av, "any") != 0) 3777 ret = cmd; 3778 3779 return ret; 3780 } 3781 3782 /* 3783 * Parse arguments and assemble the microinstructions which make up a rule. 3784 * Rules are added into the 'rulebuf' and then copied in the correct order 3785 * into the actual rule. 3786 * 3787 * The syntax for a rule starts with the action, followed by 3788 * optional action parameters, and the various match patterns. 3789 * In the assembled microcode, the first opcode must be an O_PROBE_STATE 3790 * (generated if the rule includes a keep-state option), then the 3791 * various match patterns, log/altq actions, and the actual action. 3792 * 3793 */ 3794 static void 3795 compile_rule(char *av[], uint32_t *rbuf, int *rbufsize, struct tidx *tstate) 3796 { 3797 /* 3798 * rules are added into the 'rulebuf' and then copied in 3799 * the correct order into the actual rule. 3800 * Some things that need to go out of order (prob, action etc.) 3801 * go into actbuf[]. 3802 */ 3803 static uint32_t actbuf[255], cmdbuf[255]; 3804 int rblen, ablen, cblen; 3805 3806 ipfw_insn *src, *dst, *cmd, *action, *prev=NULL; 3807 ipfw_insn *first_cmd; /* first match pattern */ 3808 3809 struct ip_fw_rule *rule; 3810 3811 /* 3812 * various flags used to record that we entered some fields. 3813 */ 3814 ipfw_insn *have_state = NULL; /* any state-related option */ 3815 int have_rstate = 0; 3816 ipfw_insn *have_log = NULL, *have_altq = NULL, *have_tag = NULL; 3817 ipfw_insn *have_skipcmd = NULL; 3818 size_t len; 3819 3820 int i; 3821 3822 int open_par = 0; /* open parenthesis ( */ 3823 3824 /* proto is here because it is used to fetch ports */ 3825 u_char proto = IPPROTO_IP; /* default protocol */ 3826 3827 double match_prob = 1; /* match probability, default is always match */ 3828 3829 bzero(actbuf, sizeof(actbuf)); /* actions go here */ 3830 bzero(cmdbuf, sizeof(cmdbuf)); 3831 bzero(rbuf, *rbufsize); 3832 3833 rule = (struct ip_fw_rule *)rbuf; 3834 cmd = (ipfw_insn *)cmdbuf; 3835 action = (ipfw_insn *)actbuf; 3836 3837 rblen = *rbufsize / sizeof(uint32_t); 3838 rblen -= sizeof(struct ip_fw_rule) / sizeof(uint32_t); 3839 ablen = sizeof(actbuf) / sizeof(actbuf[0]); 3840 cblen = sizeof(cmdbuf) / sizeof(cmdbuf[0]); 3841 cblen -= F_INSN_SIZE(ipfw_insn_u32) + 1; 3842 3843 #define CHECK_RBUFLEN(len) { CHECK_LENGTH(rblen, len); rblen -= len; } 3844 #define CHECK_ACTLEN CHECK_LENGTH(ablen, action->len) 3845 3846 av++; 3847 3848 /* [rule N] -- Rule number optional */ 3849 if (av[0] && isdigit(**av)) { 3850 rule->rulenum = atoi(*av); 3851 av++; 3852 } 3853 3854 /* [set N] -- set number (0..RESVD_SET), optional */ 3855 if (av[0] && av[1] && _substrcmp(*av, "set") == 0) { 3856 int set = strtoul(av[1], NULL, 10); 3857 if (set < 0 || set > RESVD_SET) 3858 errx(EX_DATAERR, "illegal set %s", av[1]); 3859 rule->set = set; 3860 tstate->set = set; 3861 av += 2; 3862 } 3863 3864 /* [prob D] -- match probability, optional */ 3865 if (av[0] && av[1] && _substrcmp(*av, "prob") == 0) { 3866 match_prob = strtod(av[1], NULL); 3867 3868 if (match_prob <= 0 || match_prob > 1) 3869 errx(EX_DATAERR, "illegal match prob. %s", av[1]); 3870 av += 2; 3871 } 3872 3873 /* action -- mandatory */ 3874 NEED1("missing action"); 3875 i = match_token(rule_actions, *av); 3876 av++; 3877 action->len = 1; /* default */ 3878 CHECK_ACTLEN; 3879 switch(i) { 3880 case TOK_CHECKSTATE: 3881 have_state = action; 3882 action->opcode = O_CHECK_STATE; 3883 if (*av == NULL || 3884 match_token(rule_options, *av) == TOK_COMMENT) { 3885 action->arg1 = pack_object(tstate, 3886 default_state_name, IPFW_TLV_STATE_NAME); 3887 break; 3888 } 3889 if (*av[0] == ':') { 3890 if (strcmp(*av + 1, "any") == 0) 3891 action->arg1 = 0; 3892 else if (state_check_name(*av + 1) == 0) 3893 action->arg1 = pack_object(tstate, *av + 1, 3894 IPFW_TLV_STATE_NAME); 3895 else 3896 errx(EX_DATAERR, "Invalid state name %s", 3897 *av); 3898 av++; 3899 break; 3900 } 3901 errx(EX_DATAERR, "Invalid state name %s", *av); 3902 break; 3903 3904 case TOK_ABORT: 3905 action->opcode = O_REJECT; 3906 action->arg1 = ICMP_REJECT_ABORT; 3907 break; 3908 3909 case TOK_ABORT6: 3910 action->opcode = O_UNREACH6; 3911 action->arg1 = ICMP6_UNREACH_ABORT; 3912 break; 3913 3914 case TOK_ACCEPT: 3915 action->opcode = O_ACCEPT; 3916 break; 3917 3918 case TOK_DENY: 3919 action->opcode = O_DENY; 3920 action->arg1 = 0; 3921 break; 3922 3923 case TOK_REJECT: 3924 action->opcode = O_REJECT; 3925 action->arg1 = ICMP_UNREACH_HOST; 3926 break; 3927 3928 case TOK_RESET: 3929 action->opcode = O_REJECT; 3930 action->arg1 = ICMP_REJECT_RST; 3931 break; 3932 3933 case TOK_RESET6: 3934 action->opcode = O_UNREACH6; 3935 action->arg1 = ICMP6_UNREACH_RST; 3936 break; 3937 3938 case TOK_UNREACH: 3939 action->opcode = O_REJECT; 3940 NEED1("missing reject code"); 3941 fill_reject_code(&action->arg1, *av); 3942 av++; 3943 break; 3944 3945 case TOK_UNREACH6: 3946 action->opcode = O_UNREACH6; 3947 NEED1("missing unreach code"); 3948 fill_unreach6_code(&action->arg1, *av); 3949 av++; 3950 break; 3951 3952 case TOK_COUNT: 3953 action->opcode = O_COUNT; 3954 break; 3955 3956 case TOK_NAT: 3957 action->opcode = O_NAT; 3958 action->len = F_INSN_SIZE(ipfw_insn_nat); 3959 CHECK_ACTLEN; 3960 if (*av != NULL && _substrcmp(*av, "global") == 0) { 3961 action->arg1 = IP_FW_NAT44_GLOBAL; 3962 av++; 3963 break; 3964 } else 3965 goto chkarg; 3966 case TOK_QUEUE: 3967 action->opcode = O_QUEUE; 3968 goto chkarg; 3969 case TOK_PIPE: 3970 action->opcode = O_PIPE; 3971 goto chkarg; 3972 case TOK_SKIPTO: 3973 action->opcode = O_SKIPTO; 3974 goto chkarg; 3975 case TOK_NETGRAPH: 3976 action->opcode = O_NETGRAPH; 3977 goto chkarg; 3978 case TOK_NGTEE: 3979 action->opcode = O_NGTEE; 3980 goto chkarg; 3981 case TOK_DIVERT: 3982 action->opcode = O_DIVERT; 3983 goto chkarg; 3984 case TOK_TEE: 3985 action->opcode = O_TEE; 3986 goto chkarg; 3987 case TOK_CALL: 3988 action->opcode = O_CALLRETURN; 3989 chkarg: 3990 if (!av[0]) 3991 errx(EX_USAGE, "missing argument for %s", *(av - 1)); 3992 if (isdigit(**av)) { 3993 action->arg1 = strtoul(*av, NULL, 10); 3994 if (action->arg1 <= 0 || action->arg1 >= IP_FW_TABLEARG) 3995 errx(EX_DATAERR, "illegal argument for %s", 3996 *(av - 1)); 3997 } else if (_substrcmp(*av, "tablearg") == 0) { 3998 action->arg1 = IP_FW_TARG; 3999 } else if (i == TOK_DIVERT || i == TOK_TEE) { 4000 struct servent *s; 4001 setservent(1); 4002 s = getservbyname(av[0], "divert"); 4003 if (s != NULL) 4004 action->arg1 = ntohs(s->s_port); 4005 else 4006 errx(EX_DATAERR, "illegal divert/tee port"); 4007 } else 4008 errx(EX_DATAERR, "illegal argument for %s", *(av - 1)); 4009 av++; 4010 break; 4011 4012 case TOK_FORWARD: { 4013 /* 4014 * Locate the address-port separator (':' or ','). 4015 * Could be one of the following: 4016 * hostname:port 4017 * IPv4 a.b.c.d,port 4018 * IPv4 a.b.c.d:port 4019 * IPv6 w:x:y::z,port 4020 * IPv6 [w:x:y::z]:port 4021 */ 4022 struct sockaddr_storage result; 4023 struct addrinfo *res; 4024 char *s, *end; 4025 int family; 4026 u_short port_number = 0; 4027 4028 NEED1("missing forward address[:port]"); 4029 4030 if (strncmp(*av, "tablearg", 8) == 0 && 4031 ((*av)[8] == '\0' || (*av)[8] == ',' || (*av)[8] == ':')) 4032 memcpy(++(*av), "0.0.0.0", 7); 4033 4034 /* 4035 * Are we an bracket-enclosed IPv6 address? 4036 */ 4037 if (strchr(*av, '[')) 4038 (*av)++; 4039 4040 /* 4041 * locate the address-port separator (':' or ',') 4042 */ 4043 s = strchr(*av, ','); 4044 if (s == NULL) { 4045 s = strchr(*av, ']'); 4046 /* Prevent erroneous parsing on brackets. */ 4047 if (s != NULL) 4048 *(s++) = '\0'; 4049 else 4050 s = *av; 4051 4052 /* Distinguish between IPv4:port and IPv6 cases. */ 4053 s = strchr(s, ':'); 4054 if (s && strchr(s+1, ':')) 4055 s = NULL; /* no port */ 4056 } 4057 4058 if (s != NULL) { 4059 /* Terminate host portion and set s to start of port. */ 4060 *(s++) = '\0'; 4061 i = strtoport(s, &end, 0 /* base */, 0 /* proto */); 4062 if (s == end) 4063 errx(EX_DATAERR, 4064 "illegal forwarding port ``%s''", s); 4065 port_number = (u_short)i; 4066 } 4067 4068 /* 4069 * Resolve the host name or address to a family and a 4070 * network representation of the address. 4071 */ 4072 if (getaddrinfo(*av, NULL, NULL, &res)) 4073 errx(EX_DATAERR, NULL); 4074 /* Just use the first host in the answer. */ 4075 family = res->ai_family; 4076 memcpy(&result, res->ai_addr, res->ai_addrlen); 4077 freeaddrinfo(res); 4078 4079 if (family == PF_INET) { 4080 ipfw_insn_sa *p = (ipfw_insn_sa *)action; 4081 4082 action->opcode = O_FORWARD_IP; 4083 action->len = F_INSN_SIZE(ipfw_insn_sa); 4084 CHECK_ACTLEN; 4085 4086 /* 4087 * In the kernel we assume AF_INET and use only 4088 * sin_port and sin_addr. Remember to set sin_len as 4089 * the routing code seems to use it too. 4090 */ 4091 p->sa.sin_len = sizeof(struct sockaddr_in); 4092 p->sa.sin_family = AF_INET; 4093 p->sa.sin_port = port_number; 4094 p->sa.sin_addr.s_addr = 4095 ((struct sockaddr_in *)&result)->sin_addr.s_addr; 4096 } else if (family == PF_INET6) { 4097 ipfw_insn_sa6 *p = (ipfw_insn_sa6 *)action; 4098 4099 action->opcode = O_FORWARD_IP6; 4100 action->len = F_INSN_SIZE(ipfw_insn_sa6); 4101 CHECK_ACTLEN; 4102 4103 p->sa.sin6_len = sizeof(struct sockaddr_in6); 4104 p->sa.sin6_family = AF_INET6; 4105 p->sa.sin6_port = port_number; 4106 p->sa.sin6_flowinfo = 0; 4107 p->sa.sin6_scope_id = 4108 ((struct sockaddr_in6 *)&result)->sin6_scope_id; 4109 bcopy(&((struct sockaddr_in6*)&result)->sin6_addr, 4110 &p->sa.sin6_addr, sizeof(p->sa.sin6_addr)); 4111 } else { 4112 errx(EX_DATAERR, "Invalid address family in forward action"); 4113 } 4114 av++; 4115 break; 4116 } 4117 case TOK_COMMENT: 4118 /* pretend it is a 'count' rule followed by the comment */ 4119 action->opcode = O_COUNT; 4120 av--; /* go back... */ 4121 break; 4122 4123 case TOK_SETFIB: 4124 { 4125 int numfibs; 4126 size_t intsize = sizeof(int); 4127 4128 action->opcode = O_SETFIB; 4129 NEED1("missing fib number"); 4130 if (_substrcmp(*av, "tablearg") == 0) { 4131 action->arg1 = IP_FW_TARG; 4132 } else { 4133 action->arg1 = strtoul(*av, NULL, 10); 4134 if (sysctlbyname("net.fibs", &numfibs, &intsize, 4135 NULL, 0) == -1) 4136 errx(EX_DATAERR, "fibs not supported.\n"); 4137 if (action->arg1 >= numfibs) /* Temporary */ 4138 errx(EX_DATAERR, "fib too large.\n"); 4139 /* Add high-order bit to fib to make room for tablearg*/ 4140 action->arg1 |= 0x8000; 4141 } 4142 av++; 4143 break; 4144 } 4145 4146 case TOK_SETDSCP: 4147 { 4148 int code; 4149 4150 action->opcode = O_SETDSCP; 4151 NEED1("missing DSCP code"); 4152 if (_substrcmp(*av, "tablearg") == 0) { 4153 action->arg1 = IP_FW_TARG; 4154 } else { 4155 if (isalpha(*av[0])) { 4156 if ((code = match_token(f_ipdscp, *av)) == -1) 4157 errx(EX_DATAERR, "Unknown DSCP code"); 4158 action->arg1 = code; 4159 } else 4160 action->arg1 = strtoul(*av, NULL, 10); 4161 /* 4162 * Add high-order bit to DSCP to make room 4163 * for tablearg 4164 */ 4165 action->arg1 |= 0x8000; 4166 } 4167 av++; 4168 break; 4169 } 4170 4171 case TOK_REASS: 4172 action->opcode = O_REASS; 4173 break; 4174 4175 case TOK_RETURN: 4176 fill_cmd(action, O_CALLRETURN, F_NOT, 0); 4177 break; 4178 4179 case TOK_TCPSETMSS: { 4180 u_long mss; 4181 uint16_t idx; 4182 4183 idx = pack_object(tstate, "tcp-setmss", IPFW_TLV_EACTION); 4184 if (idx == 0) 4185 errx(EX_DATAERR, "pack_object failed"); 4186 fill_cmd(action, O_EXTERNAL_ACTION, 0, idx); 4187 NEED1("Missing MSS value"); 4188 action = next_cmd(action, &ablen); 4189 action->len = 1; 4190 CHECK_ACTLEN; 4191 mss = strtoul(*av, NULL, 10); 4192 if (mss == 0 || mss > UINT16_MAX) 4193 errx(EX_USAGE, "invalid MSS value %s", *av); 4194 fill_cmd(action, O_EXTERNAL_DATA, 0, (uint16_t)mss); 4195 av++; 4196 break; 4197 } 4198 4199 default: 4200 av--; 4201 if (match_token(rule_eactions, *av) == -1) 4202 errx(EX_DATAERR, "invalid action %s\n", *av); 4203 /* 4204 * External actions support. 4205 * XXX: we support only syntax with instance name. 4206 * For known external actions (from rule_eactions list) 4207 * we can handle syntax directly. But with `eaction' 4208 * keyword we can use only `eaction <name> <instance>' 4209 * syntax. 4210 */ 4211 case TOK_EACTION: { 4212 uint16_t idx; 4213 4214 NEED1("Missing eaction name"); 4215 if (eaction_check_name(*av) != 0) 4216 errx(EX_DATAERR, "Invalid eaction name %s", *av); 4217 idx = pack_object(tstate, *av, IPFW_TLV_EACTION); 4218 if (idx == 0) 4219 errx(EX_DATAERR, "pack_object failed"); 4220 fill_cmd(action, O_EXTERNAL_ACTION, 0, idx); 4221 av++; 4222 NEED1("Missing eaction instance name"); 4223 action = next_cmd(action, &ablen); 4224 action->len = 1; 4225 CHECK_ACTLEN; 4226 if (eaction_check_name(*av) != 0) 4227 errx(EX_DATAERR, "Invalid eaction instance name %s", 4228 *av); 4229 /* 4230 * External action instance object has TLV type depended 4231 * from the external action name object index. Since we 4232 * currently don't know this index, use zero as TLV type. 4233 */ 4234 idx = pack_object(tstate, *av, 0); 4235 if (idx == 0) 4236 errx(EX_DATAERR, "pack_object failed"); 4237 fill_cmd(action, O_EXTERNAL_INSTANCE, 0, idx); 4238 av++; 4239 } 4240 } 4241 action = next_cmd(action, &ablen); 4242 4243 /* 4244 * [altq queuename] -- altq tag, optional 4245 * [log [logamount N]] -- log, optional 4246 * 4247 * If they exist, it go first in the cmdbuf, but then it is 4248 * skipped in the copy section to the end of the buffer. 4249 */ 4250 while (av[0] != NULL && (i = match_token(rule_action_params, *av)) != -1) { 4251 av++; 4252 switch (i) { 4253 case TOK_LOG: 4254 { 4255 ipfw_insn_log *c = (ipfw_insn_log *)cmd; 4256 int l; 4257 4258 if (have_log) 4259 errx(EX_DATAERR, 4260 "log cannot be specified more than once"); 4261 have_log = (ipfw_insn *)c; 4262 cmd->len = F_INSN_SIZE(ipfw_insn_log); 4263 CHECK_CMDLEN; 4264 cmd->opcode = O_LOG; 4265 if (av[0] && _substrcmp(*av, "logamount") == 0) { 4266 av++; 4267 NEED1("logamount requires argument"); 4268 l = atoi(*av); 4269 if (l < 0) 4270 errx(EX_DATAERR, 4271 "logamount must be positive"); 4272 c->max_log = l; 4273 av++; 4274 } else { 4275 len = sizeof(c->max_log); 4276 if (sysctlbyname("net.inet.ip.fw.verbose_limit", 4277 &c->max_log, &len, NULL, 0) == -1) { 4278 if (g_co.test_only) { 4279 c->max_log = 0; 4280 break; 4281 } 4282 errx(1, "sysctlbyname(\"%s\")", 4283 "net.inet.ip.fw.verbose_limit"); 4284 } 4285 } 4286 } 4287 break; 4288 4289 #ifndef NO_ALTQ 4290 case TOK_ALTQ: 4291 { 4292 ipfw_insn_altq *a = (ipfw_insn_altq *)cmd; 4293 4294 NEED1("missing altq queue name"); 4295 if (have_altq) 4296 errx(EX_DATAERR, 4297 "altq cannot be specified more than once"); 4298 have_altq = (ipfw_insn *)a; 4299 cmd->len = F_INSN_SIZE(ipfw_insn_altq); 4300 CHECK_CMDLEN; 4301 cmd->opcode = O_ALTQ; 4302 a->qid = altq_name_to_qid(*av); 4303 av++; 4304 } 4305 break; 4306 #endif 4307 4308 case TOK_TAG: 4309 case TOK_UNTAG: { 4310 uint16_t tag; 4311 4312 if (have_tag) 4313 errx(EX_USAGE, "tag and untag cannot be " 4314 "specified more than once"); 4315 GET_UINT_ARG(tag, IPFW_ARG_MIN, IPFW_ARG_MAX, i, 4316 rule_action_params); 4317 have_tag = cmd; 4318 fill_cmd(cmd, O_TAG, (i == TOK_TAG) ? 0: F_NOT, tag); 4319 av++; 4320 break; 4321 } 4322 4323 default: 4324 abort(); 4325 } 4326 cmd = next_cmd(cmd, &cblen); 4327 } 4328 4329 if (have_state) { /* must be a check-state, we are done */ 4330 if (*av != NULL && 4331 match_token(rule_options, *av) == TOK_COMMENT) { 4332 /* check-state has a comment */ 4333 av++; 4334 fill_comment(cmd, av, cblen); 4335 cmd = next_cmd(cmd, &cblen); 4336 av[0] = NULL; 4337 } 4338 goto done; 4339 } 4340 4341 #define OR_START(target) \ 4342 if (av[0] && (*av[0] == '(' || *av[0] == '{')) { \ 4343 if (open_par) \ 4344 errx(EX_USAGE, "nested \"(\" not allowed\n"); \ 4345 prev = NULL; \ 4346 open_par = 1; \ 4347 if ( (av[0])[1] == '\0') { \ 4348 av++; \ 4349 } else \ 4350 (*av)++; \ 4351 } \ 4352 target: \ 4353 4354 4355 #define CLOSE_PAR \ 4356 if (open_par) { \ 4357 if (av[0] && ( \ 4358 strcmp(*av, ")") == 0 || \ 4359 strcmp(*av, "}") == 0)) { \ 4360 prev = NULL; \ 4361 open_par = 0; \ 4362 av++; \ 4363 } else \ 4364 errx(EX_USAGE, "missing \")\"\n"); \ 4365 } 4366 4367 #define NOT_BLOCK \ 4368 if (av[0] && _substrcmp(*av, "not") == 0) { \ 4369 if (cmd->len & F_NOT) \ 4370 errx(EX_USAGE, "double \"not\" not allowed\n"); \ 4371 cmd->len |= F_NOT; \ 4372 av++; \ 4373 } 4374 4375 #define OR_BLOCK(target) \ 4376 if (av[0] && _substrcmp(*av, "or") == 0) { \ 4377 if (prev == NULL || open_par == 0) \ 4378 errx(EX_DATAERR, "invalid OR block"); \ 4379 prev->len |= F_OR; \ 4380 av++; \ 4381 goto target; \ 4382 } \ 4383 CLOSE_PAR; 4384 4385 first_cmd = cmd; 4386 4387 #if 0 4388 /* 4389 * MAC addresses, optional. 4390 * If we have this, we skip the part "proto from src to dst" 4391 * and jump straight to the option parsing. 4392 */ 4393 NOT_BLOCK; 4394 NEED1("missing protocol"); 4395 if (_substrcmp(*av, "MAC") == 0 || 4396 _substrcmp(*av, "mac") == 0) { 4397 av++; /* the "MAC" keyword */ 4398 add_mac(cmd, av); /* exits in case of errors */ 4399 cmd = next_cmd(cmd); 4400 av += 2; /* dst-mac and src-mac */ 4401 NOT_BLOCK; 4402 NEED1("missing mac type"); 4403 if (add_mactype(cmd, av[0])) 4404 cmd = next_cmd(cmd); 4405 av++; /* any or mac-type */ 4406 goto read_options; 4407 } 4408 #endif 4409 4410 /* 4411 * protocol, mandatory 4412 */ 4413 OR_START(get_proto); 4414 NOT_BLOCK; 4415 NEED1("missing protocol"); 4416 if (add_proto_compat(cmd, *av, &proto)) { 4417 av++; 4418 if (F_LEN(cmd) != 0) { 4419 prev = cmd; 4420 cmd = next_cmd(cmd, &cblen); 4421 } 4422 } else if (first_cmd != cmd) { 4423 errx(EX_DATAERR, "invalid protocol ``%s''", *av); 4424 } else { 4425 rule->flags |= IPFW_RULE_JUSTOPTS; 4426 goto read_options; 4427 } 4428 OR_BLOCK(get_proto); 4429 4430 first_cmd = cmd; /* update pointer to use in compact form */ 4431 4432 /* 4433 * "from", mandatory 4434 */ 4435 if ((av[0] == NULL) || _substrcmp(*av, "from") != 0) 4436 errx(EX_USAGE, "missing ``from''"); 4437 av++; 4438 4439 /* 4440 * source IP, mandatory 4441 */ 4442 OR_START(source_ip); 4443 NOT_BLOCK; /* optional "not" */ 4444 NEED1("missing source address"); 4445 if (add_src(cmd, *av, proto, cblen, tstate)) { 4446 av++; 4447 if (F_LEN(cmd) != 0) { /* ! any */ 4448 prev = cmd; 4449 cmd = next_cmd(cmd, &cblen); 4450 } 4451 } else 4452 errx(EX_USAGE, "bad source address %s", *av); 4453 OR_BLOCK(source_ip); 4454 4455 /* 4456 * source ports, optional 4457 */ 4458 NOT_BLOCK; /* optional "not" */ 4459 if ( av[0] != NULL ) { 4460 if (_substrcmp(*av, "any") == 0 || 4461 add_ports(cmd, *av, proto, O_IP_SRCPORT, cblen)) { 4462 av++; 4463 if (F_LEN(cmd) != 0) 4464 cmd = next_cmd(cmd, &cblen); 4465 } 4466 } 4467 4468 /* 4469 * "to", mandatory 4470 */ 4471 if ( (av[0] == NULL) || _substrcmp(*av, "to") != 0 ) 4472 errx(EX_USAGE, "missing ``to''"); 4473 av++; 4474 4475 /* 4476 * destination, mandatory 4477 */ 4478 OR_START(dest_ip); 4479 NOT_BLOCK; /* optional "not" */ 4480 NEED1("missing dst address"); 4481 if (add_dst(cmd, *av, proto, cblen, tstate)) { 4482 av++; 4483 if (F_LEN(cmd) != 0) { /* ! any */ 4484 prev = cmd; 4485 cmd = next_cmd(cmd, &cblen); 4486 } 4487 } else 4488 errx( EX_USAGE, "bad destination address %s", *av); 4489 OR_BLOCK(dest_ip); 4490 4491 /* 4492 * dest. ports, optional 4493 */ 4494 NOT_BLOCK; /* optional "not" */ 4495 if (av[0]) { 4496 if (_substrcmp(*av, "any") == 0 || 4497 add_ports(cmd, *av, proto, O_IP_DSTPORT, cblen)) { 4498 av++; 4499 if (F_LEN(cmd) != 0) 4500 cmd = next_cmd(cmd, &cblen); 4501 } 4502 } 4503 if (first_cmd == cmd) 4504 rule->flags |= IPFW_RULE_NOOPT; 4505 4506 read_options: 4507 prev = NULL; 4508 while ( av[0] != NULL ) { 4509 char *s; 4510 ipfw_insn_u32 *cmd32; /* alias for cmd */ 4511 4512 s = *av; 4513 cmd32 = (ipfw_insn_u32 *)cmd; 4514 4515 if (*s == '!') { /* alternate syntax for NOT */ 4516 if (cmd->len & F_NOT) 4517 errx(EX_USAGE, "double \"not\" not allowed\n"); 4518 cmd->len = F_NOT; 4519 s++; 4520 } 4521 i = match_token(rule_options, s); 4522 av++; 4523 switch(i) { 4524 case TOK_NOT: 4525 if (cmd->len & F_NOT) 4526 errx(EX_USAGE, "double \"not\" not allowed\n"); 4527 cmd->len = F_NOT; 4528 break; 4529 4530 case TOK_OR: 4531 if (open_par == 0 || prev == NULL) 4532 errx(EX_USAGE, "invalid \"or\" block\n"); 4533 prev->len |= F_OR; 4534 break; 4535 4536 case TOK_STARTBRACE: 4537 if (open_par) 4538 errx(EX_USAGE, "+nested \"(\" not allowed\n"); 4539 open_par = 1; 4540 break; 4541 4542 case TOK_ENDBRACE: 4543 if (!open_par) 4544 errx(EX_USAGE, "+missing \")\"\n"); 4545 open_par = 0; 4546 prev = NULL; 4547 break; 4548 4549 case TOK_IN: 4550 fill_cmd(cmd, O_IN, 0, 0); 4551 break; 4552 4553 case TOK_OUT: 4554 cmd->len ^= F_NOT; /* toggle F_NOT */ 4555 fill_cmd(cmd, O_IN, 0, 0); 4556 break; 4557 4558 case TOK_DIVERTED: 4559 fill_cmd(cmd, O_DIVERTED, 0, 3); 4560 break; 4561 4562 case TOK_DIVERTEDLOOPBACK: 4563 fill_cmd(cmd, O_DIVERTED, 0, 1); 4564 break; 4565 4566 case TOK_DIVERTEDOUTPUT: 4567 fill_cmd(cmd, O_DIVERTED, 0, 2); 4568 break; 4569 4570 case TOK_FRAG: { 4571 uint32_t set = 0, clear = 0; 4572 4573 if (*av != NULL && fill_flags(f_ipoff, *av, NULL, 4574 &set, &clear) == 0) 4575 av++; 4576 else { 4577 /* 4578 * Compatibility: no argument after "frag" 4579 * keyword equals to "frag offset". 4580 */ 4581 set = 0x01; 4582 clear = 0; 4583 } 4584 fill_cmd(cmd, O_FRAG, 0, 4585 (set & 0xff) | ( (clear & 0xff) << 8)); 4586 break; 4587 } 4588 4589 case TOK_LAYER2: 4590 fill_cmd(cmd, O_LAYER2, 0, 0); 4591 break; 4592 4593 case TOK_XMIT: 4594 case TOK_RECV: 4595 case TOK_VIA: 4596 NEED1("recv, xmit, via require interface name" 4597 " or address"); 4598 fill_iface((ipfw_insn_if *)cmd, av[0], cblen, tstate); 4599 av++; 4600 if (F_LEN(cmd) == 0) /* not a valid address */ 4601 break; 4602 if (i == TOK_XMIT) 4603 cmd->opcode = O_XMIT; 4604 else if (i == TOK_RECV) 4605 cmd->opcode = O_RECV; 4606 else if (i == TOK_VIA) 4607 cmd->opcode = O_VIA; 4608 break; 4609 4610 case TOK_ICMPTYPES: 4611 NEED1("icmptypes requires list of types"); 4612 fill_icmptypes((ipfw_insn_u32 *)cmd, *av); 4613 av++; 4614 break; 4615 4616 case TOK_ICMP6TYPES: 4617 NEED1("icmptypes requires list of types"); 4618 fill_icmp6types((ipfw_insn_icmp6 *)cmd, *av, cblen); 4619 av++; 4620 break; 4621 4622 case TOK_IPTTL: 4623 NEED1("ipttl requires TTL"); 4624 if (strpbrk(*av, "-,")) { 4625 if (!add_ports(cmd, *av, 0, O_IPTTL, cblen)) 4626 errx(EX_DATAERR, "invalid ipttl %s", *av); 4627 } else 4628 fill_cmd(cmd, O_IPTTL, 0, strtoul(*av, NULL, 0)); 4629 av++; 4630 break; 4631 4632 case TOK_IPID: 4633 NEED1("ipid requires id"); 4634 if (strpbrk(*av, "-,")) { 4635 if (!add_ports(cmd, *av, 0, O_IPID, cblen)) 4636 errx(EX_DATAERR, "invalid ipid %s", *av); 4637 } else 4638 fill_cmd(cmd, O_IPID, 0, strtoul(*av, NULL, 0)); 4639 av++; 4640 break; 4641 4642 case TOK_IPLEN: 4643 NEED1("iplen requires length"); 4644 if (strpbrk(*av, "-,")) { 4645 if (!add_ports(cmd, *av, 0, O_IPLEN, cblen)) 4646 errx(EX_DATAERR, "invalid ip len %s", *av); 4647 } else 4648 fill_cmd(cmd, O_IPLEN, 0, strtoul(*av, NULL, 0)); 4649 av++; 4650 break; 4651 4652 case TOK_IPVER: 4653 NEED1("ipver requires version"); 4654 fill_cmd(cmd, O_IPVER, 0, strtoul(*av, NULL, 0)); 4655 av++; 4656 break; 4657 4658 case TOK_IPPRECEDENCE: 4659 NEED1("ipprecedence requires value"); 4660 fill_cmd(cmd, O_IPPRECEDENCE, 0, 4661 (strtoul(*av, NULL, 0) & 7) << 5); 4662 av++; 4663 break; 4664 4665 case TOK_DSCP: 4666 NEED1("missing DSCP code"); 4667 fill_dscp(cmd, *av, cblen); 4668 av++; 4669 break; 4670 4671 case TOK_IPOPTS: 4672 NEED1("missing argument for ipoptions"); 4673 fill_flags_cmd(cmd, O_IPOPT, f_ipopts, *av); 4674 av++; 4675 break; 4676 4677 case TOK_IPTOS: 4678 NEED1("missing argument for iptos"); 4679 fill_flags_cmd(cmd, O_IPTOS, f_iptos, *av); 4680 av++; 4681 break; 4682 4683 case TOK_UID: 4684 NEED1("uid requires argument"); 4685 { 4686 char *end; 4687 uid_t uid; 4688 struct passwd *pwd; 4689 4690 cmd->opcode = O_UID; 4691 uid = strtoul(*av, &end, 0); 4692 pwd = (*end == '\0') ? getpwuid(uid) : getpwnam(*av); 4693 if (pwd == NULL) 4694 errx(EX_DATAERR, "uid \"%s\" nonexistent", *av); 4695 cmd32->d[0] = pwd->pw_uid; 4696 cmd->len |= F_INSN_SIZE(ipfw_insn_u32); 4697 av++; 4698 } 4699 break; 4700 4701 case TOK_GID: 4702 NEED1("gid requires argument"); 4703 { 4704 char *end; 4705 gid_t gid; 4706 struct group *grp; 4707 4708 cmd->opcode = O_GID; 4709 gid = strtoul(*av, &end, 0); 4710 grp = (*end == '\0') ? getgrgid(gid) : getgrnam(*av); 4711 if (grp == NULL) 4712 errx(EX_DATAERR, "gid \"%s\" nonexistent", *av); 4713 cmd32->d[0] = grp->gr_gid; 4714 cmd->len |= F_INSN_SIZE(ipfw_insn_u32); 4715 av++; 4716 } 4717 break; 4718 4719 case TOK_JAIL: 4720 NEED1("jail requires argument"); 4721 { 4722 char *end; 4723 int jid; 4724 4725 cmd->opcode = O_JAIL; 4726 /* 4727 * If av is a number, then we'll just pass it as-is. If 4728 * it's a name, try to resolve that to a jid. 4729 * 4730 * We save the jail_getid(3) call for a fallback because 4731 * it entails an unconditional trip to the kernel to 4732 * either validate a jid or resolve a name to a jid. 4733 * This specific token doesn't currently require a 4734 * jid to be an active jail, so we save a transition 4735 * by simply using a number that we're given. 4736 */ 4737 jid = strtoul(*av, &end, 10); 4738 if (*end != '\0') { 4739 jid = jail_getid(*av); 4740 if (jid < 0) 4741 errx(EX_DATAERR, "%s", jail_errmsg); 4742 } 4743 cmd32->d[0] = (uint32_t)jid; 4744 cmd->len |= F_INSN_SIZE(ipfw_insn_u32); 4745 av++; 4746 } 4747 break; 4748 4749 case TOK_ESTAB: 4750 fill_cmd(cmd, O_ESTAB, 0, 0); 4751 break; 4752 4753 case TOK_SETUP: 4754 fill_cmd(cmd, O_TCPFLAGS, 0, 4755 (TH_SYN) | ( (TH_ACK) & 0xff) <<8 ); 4756 break; 4757 4758 case TOK_TCPDATALEN: 4759 NEED1("tcpdatalen requires length"); 4760 if (strpbrk(*av, "-,")) { 4761 if (!add_ports(cmd, *av, 0, O_TCPDATALEN, cblen)) 4762 errx(EX_DATAERR, "invalid tcpdata len %s", *av); 4763 } else 4764 fill_cmd(cmd, O_TCPDATALEN, 0, 4765 strtoul(*av, NULL, 0)); 4766 av++; 4767 break; 4768 4769 case TOK_TCPOPTS: 4770 NEED1("missing argument for tcpoptions"); 4771 fill_flags_cmd(cmd, O_TCPOPTS, f_tcpopts, *av); 4772 av++; 4773 break; 4774 4775 case TOK_TCPSEQ: 4776 case TOK_TCPACK: 4777 NEED1("tcpseq/tcpack requires argument"); 4778 cmd->len = F_INSN_SIZE(ipfw_insn_u32); 4779 cmd->opcode = (i == TOK_TCPSEQ) ? O_TCPSEQ : O_TCPACK; 4780 cmd32->d[0] = htonl(strtoul(*av, NULL, 0)); 4781 av++; 4782 break; 4783 4784 case TOK_TCPMSS: 4785 case TOK_TCPWIN: 4786 NEED1("tcpmss/tcpwin requires size"); 4787 if (strpbrk(*av, "-,")) { 4788 if (add_ports(cmd, *av, 0, 4789 i == TOK_TCPWIN ? O_TCPWIN : O_TCPMSS, 4790 cblen) == NULL) 4791 errx(EX_DATAERR, "invalid %s size %s", 4792 s, *av); 4793 } else 4794 fill_cmd(cmd, i == TOK_TCPWIN ? O_TCPWIN : 4795 O_TCPMSS, 0, strtoul(*av, NULL, 0)); 4796 av++; 4797 break; 4798 4799 case TOK_TCPFLAGS: 4800 NEED1("missing argument for tcpflags"); 4801 cmd->opcode = O_TCPFLAGS; 4802 fill_flags_cmd(cmd, O_TCPFLAGS, f_tcpflags, *av); 4803 av++; 4804 break; 4805 4806 case TOK_KEEPSTATE: 4807 case TOK_RECORDSTATE: { 4808 uint16_t uidx; 4809 4810 if (open_par) 4811 errx(EX_USAGE, "keep-state or record-state cannot be part " 4812 "of an or block"); 4813 if (have_state) 4814 errx(EX_USAGE, "only one of keep-state, record-state, " 4815 " limit and set-limit is allowed"); 4816 if (*av != NULL && *av[0] == ':') { 4817 if (state_check_name(*av + 1) != 0) 4818 errx(EX_DATAERR, 4819 "Invalid state name %s", *av); 4820 uidx = pack_object(tstate, *av + 1, 4821 IPFW_TLV_STATE_NAME); 4822 av++; 4823 } else 4824 uidx = pack_object(tstate, default_state_name, 4825 IPFW_TLV_STATE_NAME); 4826 have_state = cmd; 4827 have_rstate = i == TOK_RECORDSTATE; 4828 fill_cmd(cmd, O_KEEP_STATE, 0, uidx); 4829 break; 4830 } 4831 4832 case TOK_LIMIT: 4833 case TOK_SETLIMIT: { 4834 ipfw_insn_limit *c = (ipfw_insn_limit *)cmd; 4835 int val; 4836 4837 if (open_par) 4838 errx(EX_USAGE, 4839 "limit or set-limit cannot be part of an or block"); 4840 if (have_state) 4841 errx(EX_USAGE, "only one of keep-state, record-state, " 4842 " limit and set-limit is allowed"); 4843 have_state = cmd; 4844 have_rstate = i == TOK_SETLIMIT; 4845 4846 cmd->len = F_INSN_SIZE(ipfw_insn_limit); 4847 CHECK_CMDLEN; 4848 cmd->opcode = O_LIMIT; 4849 c->limit_mask = c->conn_limit = 0; 4850 4851 while ( av[0] != NULL ) { 4852 if ((val = match_token(limit_masks, *av)) <= 0) 4853 break; 4854 c->limit_mask |= val; 4855 av++; 4856 } 4857 4858 if (c->limit_mask == 0) 4859 errx(EX_USAGE, "limit: missing limit mask"); 4860 4861 GET_UINT_ARG(c->conn_limit, IPFW_ARG_MIN, IPFW_ARG_MAX, 4862 TOK_LIMIT, rule_options); 4863 av++; 4864 4865 if (*av != NULL && *av[0] == ':') { 4866 if (state_check_name(*av + 1) != 0) 4867 errx(EX_DATAERR, 4868 "Invalid state name %s", *av); 4869 cmd->arg1 = pack_object(tstate, *av + 1, 4870 IPFW_TLV_STATE_NAME); 4871 av++; 4872 } else 4873 cmd->arg1 = pack_object(tstate, 4874 default_state_name, IPFW_TLV_STATE_NAME); 4875 break; 4876 } 4877 4878 case TOK_PROTO: 4879 NEED1("missing protocol"); 4880 if (add_proto(cmd, *av, &proto)) { 4881 av++; 4882 } else 4883 errx(EX_DATAERR, "invalid protocol ``%s''", 4884 *av); 4885 break; 4886 4887 case TOK_SRCIP: 4888 NEED1("missing source IP"); 4889 if (add_srcip(cmd, *av, cblen, tstate)) { 4890 av++; 4891 } 4892 break; 4893 4894 case TOK_DSTIP: 4895 NEED1("missing destination IP"); 4896 if (add_dstip(cmd, *av, cblen, tstate)) { 4897 av++; 4898 } 4899 break; 4900 4901 case TOK_SRCIP6: 4902 NEED1("missing source IP6"); 4903 if (add_srcip6(cmd, *av, cblen, tstate)) { 4904 av++; 4905 } 4906 break; 4907 4908 case TOK_DSTIP6: 4909 NEED1("missing destination IP6"); 4910 if (add_dstip6(cmd, *av, cblen, tstate)) { 4911 av++; 4912 } 4913 break; 4914 4915 case TOK_SRCPORT: 4916 NEED1("missing source port"); 4917 if (_substrcmp(*av, "any") == 0 || 4918 add_ports(cmd, *av, proto, O_IP_SRCPORT, cblen)) { 4919 av++; 4920 } else 4921 errx(EX_DATAERR, "invalid source port %s", *av); 4922 break; 4923 4924 case TOK_DSTPORT: 4925 NEED1("missing destination port"); 4926 if (_substrcmp(*av, "any") == 0 || 4927 add_ports(cmd, *av, proto, O_IP_DSTPORT, cblen)) { 4928 av++; 4929 } else 4930 errx(EX_DATAERR, "invalid destination port %s", 4931 *av); 4932 break; 4933 4934 case TOK_MAC: 4935 if (add_mac(cmd, av, cblen)) 4936 av += 2; 4937 break; 4938 4939 case TOK_MACTYPE: 4940 NEED1("missing mac type"); 4941 if (!add_mactype(cmd, *av, cblen)) 4942 errx(EX_DATAERR, "invalid mac type %s", *av); 4943 av++; 4944 break; 4945 4946 case TOK_VERREVPATH: 4947 fill_cmd(cmd, O_VERREVPATH, 0, 0); 4948 break; 4949 4950 case TOK_VERSRCREACH: 4951 fill_cmd(cmd, O_VERSRCREACH, 0, 0); 4952 break; 4953 4954 case TOK_ANTISPOOF: 4955 fill_cmd(cmd, O_ANTISPOOF, 0, 0); 4956 break; 4957 4958 case TOK_IPSEC: 4959 fill_cmd(cmd, O_IPSEC, 0, 0); 4960 break; 4961 4962 case TOK_IPV6: 4963 fill_cmd(cmd, O_IP6, 0, 0); 4964 break; 4965 4966 case TOK_IPV4: 4967 fill_cmd(cmd, O_IP4, 0, 0); 4968 break; 4969 4970 case TOK_EXT6HDR: 4971 NEED1("missing extension header"); 4972 fill_ext6hdr( cmd, *av ); 4973 av++; 4974 break; 4975 4976 case TOK_FLOWID: 4977 if (proto != IPPROTO_IPV6 ) 4978 errx( EX_USAGE, "flow-id filter is active " 4979 "only for ipv6 protocol\n"); 4980 fill_flow6( (ipfw_insn_u32 *) cmd, *av, cblen); 4981 av++; 4982 break; 4983 4984 case TOK_COMMENT: 4985 fill_comment(cmd, av, cblen); 4986 av[0]=NULL; 4987 break; 4988 4989 case TOK_TAGGED: 4990 if (av[0] && strpbrk(*av, "-,")) { 4991 if (!add_ports(cmd, *av, 0, O_TAGGED, cblen)) 4992 errx(EX_DATAERR, "tagged: invalid tag" 4993 " list: %s", *av); 4994 } 4995 else { 4996 uint16_t tag; 4997 4998 GET_UINT_ARG(tag, IPFW_ARG_MIN, IPFW_ARG_MAX, 4999 TOK_TAGGED, rule_options); 5000 fill_cmd(cmd, O_TAGGED, 0, tag); 5001 } 5002 av++; 5003 break; 5004 5005 case TOK_FIB: 5006 NEED1("fib requires fib number"); 5007 fill_cmd(cmd, O_FIB, 0, strtoul(*av, NULL, 0)); 5008 av++; 5009 break; 5010 case TOK_SOCKARG: 5011 fill_cmd(cmd, O_SOCKARG, 0, 0); 5012 break; 5013 5014 case TOK_LOOKUP: { 5015 ipfw_insn_u32 *c = (ipfw_insn_u32 *)cmd; 5016 int j; 5017 5018 if (!av[0] || !av[1]) 5019 errx(EX_USAGE, "format: lookup argument tablenum"); 5020 cmd->opcode = O_IP_DST_LOOKUP; 5021 cmd->len |= F_INSN_SIZE(ipfw_insn) + 2; 5022 i = match_token(rule_options, *av); 5023 for (j = 0; lookup_key[j] >= 0 ; j++) { 5024 if (i == lookup_key[j]) 5025 break; 5026 } 5027 if (lookup_key[j] <= 0) 5028 errx(EX_USAGE, "format: cannot lookup on %s", *av); 5029 __PAST_END(c->d, 1) = j; // i converted to option 5030 av++; 5031 5032 if ((j = pack_table(tstate, *av)) == 0) 5033 errx(EX_DATAERR, "Invalid table name: %s", *av); 5034 5035 cmd->arg1 = j; 5036 av++; 5037 } 5038 break; 5039 case TOK_FLOW: 5040 NEED1("missing table name"); 5041 if (strncmp(*av, "table(", 6) != 0) 5042 errx(EX_DATAERR, 5043 "enclose table name into \"table()\""); 5044 fill_table(cmd, *av, O_IP_FLOW_LOOKUP, tstate); 5045 av++; 5046 break; 5047 5048 case TOK_SKIPACTION: 5049 if (have_skipcmd) 5050 errx(EX_USAGE, "only one defer-action " 5051 "is allowed"); 5052 have_skipcmd = cmd; 5053 fill_cmd(cmd, O_SKIP_ACTION, 0, 0); 5054 break; 5055 5056 default: 5057 errx(EX_USAGE, "unrecognised option [%d] %s\n", i, s); 5058 } 5059 if (F_LEN(cmd) > 0) { /* prepare to advance */ 5060 prev = cmd; 5061 cmd = next_cmd(cmd, &cblen); 5062 } 5063 } 5064 5065 done: 5066 5067 if (!have_state && have_skipcmd) 5068 warnx("Rule contains \"defer-immediate-action\" " 5069 "and doesn't contain any state-related options."); 5070 5071 /* 5072 * Now copy stuff into the rule. 5073 * If we have a keep-state option, the first instruction 5074 * must be a PROBE_STATE (which is generated here). 5075 * If we have a LOG option, it was stored as the first command, 5076 * and now must be moved to the top of the action part. 5077 */ 5078 dst = (ipfw_insn *)rule->cmd; 5079 5080 /* 5081 * First thing to write into the command stream is the match probability. 5082 */ 5083 if (match_prob != 1) { /* 1 means always match */ 5084 dst->opcode = O_PROB; 5085 dst->len = 2; 5086 *((int32_t *)(dst+1)) = (int32_t)(match_prob * 0x7fffffff); 5087 dst += dst->len; 5088 } 5089 5090 /* 5091 * generate O_PROBE_STATE if necessary 5092 */ 5093 if (have_state && have_state->opcode != O_CHECK_STATE && !have_rstate) { 5094 fill_cmd(dst, O_PROBE_STATE, 0, have_state->arg1); 5095 dst = next_cmd(dst, &rblen); 5096 } 5097 5098 /* 5099 * copy all commands but O_LOG, O_KEEP_STATE, O_LIMIT, O_ALTQ, O_TAG, 5100 * O_SKIP_ACTION 5101 */ 5102 for (src = (ipfw_insn *)cmdbuf; src != cmd; src += i) { 5103 i = F_LEN(src); 5104 CHECK_RBUFLEN(i); 5105 5106 switch (src->opcode) { 5107 case O_LOG: 5108 case O_KEEP_STATE: 5109 case O_LIMIT: 5110 case O_ALTQ: 5111 case O_TAG: 5112 case O_SKIP_ACTION: 5113 break; 5114 default: 5115 bcopy(src, dst, i * sizeof(uint32_t)); 5116 dst += i; 5117 } 5118 } 5119 5120 /* 5121 * put back the have_state command as last opcode 5122 */ 5123 if (have_state && have_state->opcode != O_CHECK_STATE) { 5124 i = F_LEN(have_state); 5125 CHECK_RBUFLEN(i); 5126 bcopy(have_state, dst, i * sizeof(uint32_t)); 5127 dst += i; 5128 } 5129 5130 /* 5131 * put back the have_skipcmd command as very last opcode 5132 */ 5133 if (have_skipcmd) { 5134 i = F_LEN(have_skipcmd); 5135 CHECK_RBUFLEN(i); 5136 bcopy(have_skipcmd, dst, i * sizeof(uint32_t)); 5137 dst += i; 5138 } 5139 5140 /* 5141 * start action section 5142 */ 5143 rule->act_ofs = dst - rule->cmd; 5144 5145 /* put back O_LOG, O_ALTQ, O_TAG if necessary */ 5146 if (have_log) { 5147 i = F_LEN(have_log); 5148 CHECK_RBUFLEN(i); 5149 bcopy(have_log, dst, i * sizeof(uint32_t)); 5150 dst += i; 5151 } 5152 if (have_altq) { 5153 i = F_LEN(have_altq); 5154 CHECK_RBUFLEN(i); 5155 bcopy(have_altq, dst, i * sizeof(uint32_t)); 5156 dst += i; 5157 } 5158 if (have_tag) { 5159 i = F_LEN(have_tag); 5160 CHECK_RBUFLEN(i); 5161 bcopy(have_tag, dst, i * sizeof(uint32_t)); 5162 dst += i; 5163 } 5164 5165 /* 5166 * copy all other actions 5167 */ 5168 for (src = (ipfw_insn *)actbuf; src != action; src += i) { 5169 i = F_LEN(src); 5170 CHECK_RBUFLEN(i); 5171 bcopy(src, dst, i * sizeof(uint32_t)); 5172 dst += i; 5173 } 5174 5175 rule->cmd_len = (uint32_t *)dst - (uint32_t *)(rule->cmd); 5176 *rbufsize = (char *)dst - (char *)rule; 5177 } 5178 5179 static int 5180 compare_ntlv(const void *_a, const void *_b) 5181 { 5182 const ipfw_obj_ntlv *a, *b; 5183 5184 a = (const ipfw_obj_ntlv *)_a; 5185 b = (const ipfw_obj_ntlv *)_b; 5186 5187 if (a->set < b->set) 5188 return (-1); 5189 else if (a->set > b->set) 5190 return (1); 5191 5192 if (a->idx < b->idx) 5193 return (-1); 5194 else if (a->idx > b->idx) 5195 return (1); 5196 5197 if (a->head.type < b->head.type) 5198 return (-1); 5199 else if (a->head.type > b->head.type) 5200 return (1); 5201 5202 return (0); 5203 } 5204 5205 /* 5206 * Provide kernel with sorted list of referenced objects 5207 */ 5208 static void 5209 object_sort_ctlv(ipfw_obj_ctlv *ctlv) 5210 { 5211 5212 qsort(ctlv + 1, ctlv->count, ctlv->objsize, compare_ntlv); 5213 } 5214 5215 struct object_kt { 5216 uint16_t uidx; 5217 uint16_t type; 5218 }; 5219 static int 5220 compare_object_kntlv(const void *k, const void *v) 5221 { 5222 const ipfw_obj_ntlv *ntlv; 5223 struct object_kt key; 5224 5225 key = *((const struct object_kt *)k); 5226 ntlv = (const ipfw_obj_ntlv *)v; 5227 5228 if (key.uidx < ntlv->idx) 5229 return (-1); 5230 else if (key.uidx > ntlv->idx) 5231 return (1); 5232 5233 if (key.type < ntlv->head.type) 5234 return (-1); 5235 else if (key.type > ntlv->head.type) 5236 return (1); 5237 5238 return (0); 5239 } 5240 5241 /* 5242 * Finds object name in @ctlv by @idx and @type. 5243 * Uses the following facts: 5244 * 1) All TLVs are the same size 5245 * 2) Kernel implementation provides already sorted list. 5246 * 5247 * Returns table name or NULL. 5248 */ 5249 static char * 5250 object_search_ctlv(ipfw_obj_ctlv *ctlv, uint16_t idx, uint16_t type) 5251 { 5252 ipfw_obj_ntlv *ntlv; 5253 struct object_kt key; 5254 5255 key.uidx = idx; 5256 key.type = type; 5257 5258 ntlv = bsearch(&key, (ctlv + 1), ctlv->count, ctlv->objsize, 5259 compare_object_kntlv); 5260 5261 if (ntlv != NULL) 5262 return (ntlv->name); 5263 5264 return (NULL); 5265 } 5266 5267 static char * 5268 table_search_ctlv(ipfw_obj_ctlv *ctlv, uint16_t idx) 5269 { 5270 5271 return (object_search_ctlv(ctlv, idx, IPFW_TLV_TBL_NAME)); 5272 } 5273 5274 /* 5275 * Adds one or more rules to ipfw chain. 5276 * Data layout: 5277 * Request: 5278 * [ 5279 * ip_fw3_opheader 5280 * [ ipfw_obj_ctlv(IPFW_TLV_TBL_LIST) ipfw_obj_ntlv x N ] (optional *1) 5281 * [ ipfw_obj_ctlv(IPFW_TLV_RULE_LIST) [ ip_fw_rule ip_fw_insn ] x N ] (*2) (*3) 5282 * ] 5283 * Reply: 5284 * [ 5285 * ip_fw3_opheader 5286 * [ ipfw_obj_ctlv(IPFW_TLV_TBL_LIST) ipfw_obj_ntlv x N ] (optional) 5287 * [ ipfw_obj_ctlv(IPFW_TLV_RULE_LIST) [ ip_fw_rule ip_fw_insn ] x N ] 5288 * ] 5289 * 5290 * Rules in reply are modified to store their actual ruleset number. 5291 * 5292 * (*1) TLVs inside IPFW_TLV_TBL_LIST needs to be sorted ascending 5293 * according to their idx field and there has to be no duplicates. 5294 * (*2) Numbered rules inside IPFW_TLV_RULE_LIST needs to be sorted ascending. 5295 * (*3) Each ip_fw structure needs to be aligned to u64 boundary. 5296 */ 5297 void 5298 ipfw_add(char *av[]) 5299 { 5300 uint32_t rulebuf[1024]; 5301 int rbufsize, default_off, tlen, rlen; 5302 size_t sz; 5303 struct tidx ts; 5304 struct ip_fw_rule *rule; 5305 caddr_t tbuf; 5306 ip_fw3_opheader *op3; 5307 ipfw_obj_ctlv *ctlv, *tstate; 5308 5309 rbufsize = sizeof(rulebuf); 5310 memset(rulebuf, 0, rbufsize); 5311 memset(&ts, 0, sizeof(ts)); 5312 5313 /* Optimize case with no tables */ 5314 default_off = sizeof(ipfw_obj_ctlv) + sizeof(ip_fw3_opheader); 5315 op3 = (ip_fw3_opheader *)rulebuf; 5316 ctlv = (ipfw_obj_ctlv *)(op3 + 1); 5317 rule = (struct ip_fw_rule *)(ctlv + 1); 5318 rbufsize -= default_off; 5319 5320 compile_rule(av, (uint32_t *)rule, &rbufsize, &ts); 5321 /* Align rule size to u64 boundary */ 5322 rlen = roundup2(rbufsize, sizeof(uint64_t)); 5323 5324 tbuf = NULL; 5325 sz = 0; 5326 tstate = NULL; 5327 if (ts.count != 0) { 5328 /* Some tables. We have to alloc more data */ 5329 tlen = ts.count * sizeof(ipfw_obj_ntlv); 5330 sz = default_off + sizeof(ipfw_obj_ctlv) + tlen + rlen; 5331 5332 if ((tbuf = calloc(1, sz)) == NULL) 5333 err(EX_UNAVAILABLE, "malloc() failed for IP_FW_ADD"); 5334 op3 = (ip_fw3_opheader *)tbuf; 5335 /* Tables first */ 5336 ctlv = (ipfw_obj_ctlv *)(op3 + 1); 5337 ctlv->head.type = IPFW_TLV_TBLNAME_LIST; 5338 ctlv->head.length = sizeof(ipfw_obj_ctlv) + tlen; 5339 ctlv->count = ts.count; 5340 ctlv->objsize = sizeof(ipfw_obj_ntlv); 5341 memcpy(ctlv + 1, ts.idx, tlen); 5342 object_sort_ctlv(ctlv); 5343 tstate = ctlv; 5344 /* Rule next */ 5345 ctlv = (ipfw_obj_ctlv *)((caddr_t)ctlv + ctlv->head.length); 5346 ctlv->head.type = IPFW_TLV_RULE_LIST; 5347 ctlv->head.length = sizeof(ipfw_obj_ctlv) + rlen; 5348 ctlv->count = 1; 5349 memcpy(ctlv + 1, rule, rbufsize); 5350 } else { 5351 /* Simply add header */ 5352 sz = rlen + default_off; 5353 memset(ctlv, 0, sizeof(*ctlv)); 5354 ctlv->head.type = IPFW_TLV_RULE_LIST; 5355 ctlv->head.length = sizeof(ipfw_obj_ctlv) + rlen; 5356 ctlv->count = 1; 5357 } 5358 5359 if (do_get3(IP_FW_XADD, op3, &sz) != 0) 5360 err(EX_UNAVAILABLE, "getsockopt(%s)", "IP_FW_XADD"); 5361 5362 if (!g_co.do_quiet) { 5363 struct format_opts sfo; 5364 struct buf_pr bp; 5365 memset(&sfo, 0, sizeof(sfo)); 5366 sfo.tstate = tstate; 5367 sfo.set_mask = (uint32_t)(-1); 5368 bp_alloc(&bp, 4096); 5369 show_static_rule(&g_co, &sfo, &bp, rule, NULL); 5370 printf("%s", bp.buf); 5371 bp_free(&bp); 5372 } 5373 5374 if (tbuf != NULL) 5375 free(tbuf); 5376 5377 if (ts.idx != NULL) 5378 free(ts.idx); 5379 } 5380 5381 /* 5382 * clear the counters or the log counters. 5383 * optname has the following values: 5384 * 0 (zero both counters and logging) 5385 * 1 (zero logging only) 5386 */ 5387 void 5388 ipfw_zero(int ac, char *av[], int optname) 5389 { 5390 ipfw_range_tlv rt; 5391 char const *errstr; 5392 char const *name = optname ? "RESETLOG" : "ZERO"; 5393 uint32_t arg; 5394 int failed = EX_OK; 5395 5396 optname = optname ? IP_FW_XRESETLOG : IP_FW_XZERO; 5397 av++; ac--; 5398 5399 if (ac == 0) { 5400 /* clear all entries */ 5401 memset(&rt, 0, sizeof(rt)); 5402 rt.flags = IPFW_RCFLAG_ALL; 5403 if (do_range_cmd(optname, &rt) < 0) 5404 err(EX_UNAVAILABLE, "setsockopt(IP_FW_X%s)", name); 5405 if (!g_co.do_quiet) 5406 printf("%s.\n", optname == IP_FW_XZERO ? 5407 "Accounting cleared":"Logging counts reset"); 5408 5409 return; 5410 } 5411 5412 while (ac) { 5413 /* Rule number */ 5414 if (isdigit(**av)) { 5415 arg = strtonum(*av, 0, 0xffff, &errstr); 5416 if (errstr) 5417 errx(EX_DATAERR, 5418 "invalid rule number %s\n", *av); 5419 memset(&rt, 0, sizeof(rt)); 5420 rt.start_rule = arg; 5421 rt.end_rule = arg; 5422 rt.flags |= IPFW_RCFLAG_RANGE; 5423 if (g_co.use_set != 0) { 5424 rt.set = g_co.use_set - 1; 5425 rt.flags |= IPFW_RCFLAG_SET; 5426 } 5427 if (do_range_cmd(optname, &rt) != 0) { 5428 warn("rule %u: setsockopt(IP_FW_X%s)", 5429 arg, name); 5430 failed = EX_UNAVAILABLE; 5431 } else if (rt.new_set == 0) { 5432 printf("Entry %d not found\n", arg); 5433 failed = EX_UNAVAILABLE; 5434 } else if (!g_co.do_quiet) 5435 printf("Entry %d %s.\n", arg, 5436 optname == IP_FW_XZERO ? 5437 "cleared" : "logging count reset"); 5438 } else { 5439 errx(EX_USAGE, "invalid rule number ``%s''", *av); 5440 } 5441 av++; ac--; 5442 } 5443 if (failed != EX_OK) 5444 exit(failed); 5445 } 5446 5447 void 5448 ipfw_flush(int force) 5449 { 5450 ipfw_range_tlv rt; 5451 5452 if (!force && !g_co.do_quiet) { /* need to ask user */ 5453 int c; 5454 5455 printf("Are you sure? [yn] "); 5456 fflush(stdout); 5457 do { 5458 c = toupper(getc(stdin)); 5459 while (c != '\n' && getc(stdin) != '\n') 5460 if (feof(stdin)) 5461 return; /* and do not flush */ 5462 } while (c != 'Y' && c != 'N'); 5463 printf("\n"); 5464 if (c == 'N') /* user said no */ 5465 return; 5466 } 5467 if (g_co.do_pipe) { 5468 dummynet_flush(); 5469 return; 5470 } 5471 /* `ipfw set N flush` - is the same that `ipfw delete set N` */ 5472 memset(&rt, 0, sizeof(rt)); 5473 if (g_co.use_set != 0) { 5474 rt.set = g_co.use_set - 1; 5475 rt.flags = IPFW_RCFLAG_SET; 5476 } else 5477 rt.flags = IPFW_RCFLAG_ALL; 5478 if (do_range_cmd(IP_FW_XDEL, &rt) != 0) 5479 err(EX_UNAVAILABLE, "setsockopt(IP_FW_XDEL)"); 5480 if (!g_co.do_quiet) 5481 printf("Flushed all %s.\n", g_co.do_pipe ? "pipes" : "rules"); 5482 } 5483 5484 static struct _s_x intcmds[] = { 5485 { "talist", TOK_TALIST }, 5486 { "iflist", TOK_IFLIST }, 5487 { "olist", TOK_OLIST }, 5488 { "vlist", TOK_VLIST }, 5489 { NULL, 0 } 5490 }; 5491 5492 static struct _s_x otypes[] = { 5493 { "EACTION", IPFW_TLV_EACTION }, 5494 { "DYNSTATE", IPFW_TLV_STATE_NAME }, 5495 { NULL, 0 } 5496 }; 5497 5498 static const char* 5499 lookup_eaction_name(ipfw_obj_ntlv *ntlv, int cnt, uint16_t type) 5500 { 5501 const char *name; 5502 int i; 5503 5504 name = NULL; 5505 for (i = 0; i < cnt; i++) { 5506 if (ntlv[i].head.type != IPFW_TLV_EACTION) 5507 continue; 5508 if (IPFW_TLV_EACTION_NAME(ntlv[i].idx) != type) 5509 continue; 5510 name = ntlv[i].name; 5511 break; 5512 } 5513 return (name); 5514 } 5515 5516 static void 5517 ipfw_list_objects(int ac __unused, char *av[] __unused) 5518 { 5519 ipfw_obj_lheader req, *olh; 5520 ipfw_obj_ntlv *ntlv; 5521 const char *name; 5522 size_t sz; 5523 uint32_t i; 5524 5525 memset(&req, 0, sizeof(req)); 5526 sz = sizeof(req); 5527 if (do_get3(IP_FW_DUMP_SRVOBJECTS, &req.opheader, &sz) != 0) 5528 if (errno != ENOMEM) 5529 return; 5530 5531 sz = req.size; 5532 if ((olh = calloc(1, sz)) == NULL) 5533 return; 5534 5535 olh->size = sz; 5536 if (do_get3(IP_FW_DUMP_SRVOBJECTS, &olh->opheader, &sz) != 0) { 5537 free(olh); 5538 return; 5539 } 5540 5541 if (olh->count > 0) 5542 printf("Objects list:\n"); 5543 else 5544 printf("There are no objects\n"); 5545 ntlv = (ipfw_obj_ntlv *)(olh + 1); 5546 for (i = 0; i < olh->count; i++) { 5547 name = match_value(otypes, ntlv->head.type); 5548 if (name == NULL) 5549 name = lookup_eaction_name( 5550 (ipfw_obj_ntlv *)(olh + 1), olh->count, 5551 ntlv->head.type); 5552 if (name == NULL) 5553 printf(" kidx: %4d\ttype: %10d\tname: %s\n", 5554 ntlv->idx, ntlv->head.type, ntlv->name); 5555 else 5556 printf(" kidx: %4d\ttype: %10s\tname: %s\n", 5557 ntlv->idx, name, ntlv->name); 5558 ntlv++; 5559 } 5560 free(olh); 5561 } 5562 5563 void 5564 ipfw_internal_handler(int ac, char *av[]) 5565 { 5566 int tcmd; 5567 5568 ac--; av++; 5569 NEED1("internal cmd required"); 5570 5571 if ((tcmd = match_token(intcmds, *av)) == -1) 5572 errx(EX_USAGE, "invalid internal sub-cmd: %s", *av); 5573 5574 switch (tcmd) { 5575 case TOK_IFLIST: 5576 ipfw_list_tifaces(); 5577 break; 5578 case TOK_TALIST: 5579 ipfw_list_ta(ac, av); 5580 break; 5581 case TOK_OLIST: 5582 ipfw_list_objects(ac, av); 5583 break; 5584 case TOK_VLIST: 5585 ipfw_list_values(ac, av); 5586 break; 5587 } 5588 } 5589 5590 static int 5591 ipfw_get_tracked_ifaces(ipfw_obj_lheader **polh) 5592 { 5593 ipfw_obj_lheader req, *olh; 5594 size_t sz; 5595 5596 memset(&req, 0, sizeof(req)); 5597 sz = sizeof(req); 5598 5599 if (do_get3(IP_FW_XIFLIST, &req.opheader, &sz) != 0) { 5600 if (errno != ENOMEM) 5601 return (errno); 5602 } 5603 5604 sz = req.size; 5605 if ((olh = calloc(1, sz)) == NULL) 5606 return (ENOMEM); 5607 5608 olh->size = sz; 5609 if (do_get3(IP_FW_XIFLIST, &olh->opheader, &sz) != 0) { 5610 free(olh); 5611 return (errno); 5612 } 5613 5614 *polh = olh; 5615 return (0); 5616 } 5617 5618 static int 5619 ifinfo_cmp(const void *a, const void *b) 5620 { 5621 const ipfw_iface_info *ia, *ib; 5622 5623 ia = (const ipfw_iface_info *)a; 5624 ib = (const ipfw_iface_info *)b; 5625 5626 return (stringnum_cmp(ia->ifname, ib->ifname)); 5627 } 5628 5629 /* 5630 * Retrieves table list from kernel, 5631 * optionally sorts it and calls requested function for each table. 5632 * Returns 0 on success. 5633 */ 5634 static void 5635 ipfw_list_tifaces(void) 5636 { 5637 ipfw_obj_lheader *olh = NULL; 5638 ipfw_iface_info *info; 5639 uint32_t i; 5640 int error; 5641 5642 if ((error = ipfw_get_tracked_ifaces(&olh)) != 0) 5643 err(EX_OSERR, "Unable to request ipfw tracked interface list"); 5644 5645 qsort(olh + 1, olh->count, olh->objsize, ifinfo_cmp); 5646 5647 info = (ipfw_iface_info *)(olh + 1); 5648 for (i = 0; i < olh->count; i++) { 5649 if (info->flags & IPFW_IFFLAG_RESOLVED) 5650 printf("%s ifindex: %d refcount: %u changes: %u\n", 5651 info->ifname, info->ifindex, info->refcnt, 5652 info->gencnt); 5653 else 5654 printf("%s ifindex: unresolved refcount: %u changes: %u\n", 5655 info->ifname, info->refcnt, info->gencnt); 5656 info = (ipfw_iface_info *)((caddr_t)info + olh->objsize); 5657 } 5658 5659 free(olh); 5660 } 5661