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 21 #include <sys/types.h> 22 #include <sys/param.h> 23 #include <sys/socket.h> 24 #include <sys/sockio.h> 25 #include <sys/sysctl.h> 26 27 #include "ipfw2.h" 28 29 #include <ctype.h> 30 #include <err.h> 31 #include <errno.h> 32 #include <grp.h> 33 #include <jail.h> 34 #include <netdb.h> 35 #include <pwd.h> 36 #include <stdio.h> 37 #include <stdarg.h> 38 #include <stdint.h> 39 #include <stdlib.h> 40 #include <string.h> 41 #include <sysexits.h> 42 #include <time.h> /* ctime */ 43 #include <timeconv.h> /* _long_to_time */ 44 #include <unistd.h> 45 #include <fcntl.h> 46 #include <stddef.h> /* offsetof */ 47 48 #include <net/ethernet.h> 49 #include <net/if.h> /* only IFNAMSIZ */ 50 #include <net/if_dl.h> 51 #include <net/route.h> 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 { "va", IPTOS_DSCP_VA >> 2 }, /* 101100 */ 194 { "ef", IPTOS_DSCP_EF >> 2 }, /* 101110 */ 195 { "cs0", IPTOS_DSCP_CS0 >> 2 }, /* 000000 */ 196 { "cs1", IPTOS_DSCP_CS1 >> 2 }, /* 001000 */ 197 { "cs2", IPTOS_DSCP_CS2 >> 2 }, /* 010000 */ 198 { "cs3", IPTOS_DSCP_CS3 >> 2 }, /* 011000 */ 199 { "cs4", IPTOS_DSCP_CS4 >> 2 }, /* 100000 */ 200 { "cs5", IPTOS_DSCP_CS5 >> 2 }, /* 101000 */ 201 { "cs6", IPTOS_DSCP_CS6 >> 2 }, /* 110000 */ 202 { "cs7", IPTOS_DSCP_CS7 >> 2 }, /* 100000 */ 203 { NULL, 0 } 204 }; 205 206 static struct _s_x limit_masks[] = { 207 {"all", DYN_SRC_ADDR|DYN_SRC_PORT|DYN_DST_ADDR|DYN_DST_PORT}, 208 {"src-addr", DYN_SRC_ADDR}, 209 {"src-port", DYN_SRC_PORT}, 210 {"dst-addr", DYN_DST_ADDR}, 211 {"dst-port", DYN_DST_PORT}, 212 {NULL, 0} 213 }; 214 215 /* 216 * we use IPPROTO_ETHERTYPE as a fake protocol id to call the print routines 217 * This is only used in this code. 218 */ 219 #define IPPROTO_ETHERTYPE 0x1000 220 static struct _s_x ether_types[] = { 221 /* 222 * Note, we cannot use "-:&/" in the names because they are field 223 * separators in the type specifications. Also, we use s = NULL as 224 * end-delimiter, because a type of 0 can be legal. 225 */ 226 { "ip", 0x0800 }, 227 { "ipv4", 0x0800 }, 228 { "ipv6", 0x86dd }, 229 { "arp", 0x0806 }, 230 { "rarp", 0x8035 }, 231 { "vlan", 0x8100 }, 232 { "loop", 0x9000 }, 233 { "trail", 0x1000 }, 234 { "at", 0x809b }, 235 { "atalk", 0x809b }, 236 { "aarp", 0x80f3 }, 237 { "pppoe_disc", 0x8863 }, 238 { "pppoe_sess", 0x8864 }, 239 { "ipx_8022", 0x00E0 }, 240 { "ipx_8023", 0x0000 }, 241 { "ipx_ii", 0x8137 }, 242 { "ipx_snap", 0x8137 }, 243 { "ipx", 0x8137 }, 244 { "ns", 0x0600 }, 245 { NULL, 0 } 246 }; 247 248 static struct _s_x rule_eactions[] = { 249 { "nat64clat", TOK_NAT64CLAT }, 250 { "nat64lsn", TOK_NAT64LSN }, 251 { "nat64stl", TOK_NAT64STL }, 252 { "nptv6", TOK_NPTV6 }, 253 { "tcp-setmss", TOK_TCPSETMSS }, 254 { NULL, 0 } /* terminator */ 255 }; 256 257 static struct _s_x rule_actions[] = { 258 { "abort6", TOK_ABORT6 }, 259 { "abort", TOK_ABORT }, 260 { "accept", TOK_ACCEPT }, 261 { "pass", TOK_ACCEPT }, 262 { "allow", TOK_ACCEPT }, 263 { "permit", TOK_ACCEPT }, 264 { "count", TOK_COUNT }, 265 { "pipe", TOK_PIPE }, 266 { "queue", TOK_QUEUE }, 267 { "divert", TOK_DIVERT }, 268 { "tee", TOK_TEE }, 269 { "netgraph", TOK_NETGRAPH }, 270 { "ngtee", TOK_NGTEE }, 271 { "fwd", TOK_FORWARD }, 272 { "forward", TOK_FORWARD }, 273 { "skipto", TOK_SKIPTO }, 274 { "deny", TOK_DENY }, 275 { "drop", TOK_DENY }, 276 { "reject", TOK_REJECT }, 277 { "reset6", TOK_RESET6 }, 278 { "reset", TOK_RESET }, 279 { "unreach6", TOK_UNREACH6 }, 280 { "unreach", TOK_UNREACH }, 281 { "check-state", TOK_CHECKSTATE }, 282 { "//", TOK_COMMENT }, 283 { "nat", TOK_NAT }, 284 { "reass", TOK_REASS }, 285 { "setfib", TOK_SETFIB }, 286 { "setdscp", TOK_SETDSCP }, 287 { "call", TOK_CALL }, 288 { "return", TOK_RETURN }, 289 { "eaction", TOK_EACTION }, 290 { "tcp-setmss", TOK_TCPSETMSS }, 291 { "setmark", TOK_SETMARK }, 292 { NULL, 0 } /* terminator */ 293 }; 294 295 static struct _s_x return_types[] = { 296 { "next-rulenum", RETURN_NEXT_RULENUM }, 297 { "next-rule", RETURN_NEXT_RULE }, 298 { NULL, 0 } /* terminator */ 299 }; 300 301 static struct _s_x rule_action_params[] = { 302 { "altq", TOK_ALTQ }, 303 { "log", TOK_LOG }, 304 { "tag", TOK_TAG }, 305 { "untag", TOK_UNTAG }, 306 { NULL, 0 } /* terminator */ 307 }; 308 309 /* 310 * The 'lookup' instruction accepts one of the following arguments. 311 * Arguments are passed as o.arg1 and o->value in O_DST_LOOKUP option. 312 */ 313 static struct _s_x lookup_keys[] = { 314 { "dst-ip", LOOKUP_DST_IP }, 315 { "src-ip", LOOKUP_SRC_IP }, 316 { "dst-ip6", LOOKUP_DST_IP6 }, 317 { "src-ip6", LOOKUP_SRC_IP6 }, 318 { "dst-ip4", LOOKUP_DST_IP4 }, 319 { "src-ip4", LOOKUP_SRC_IP4 }, 320 { "dst-port", LOOKUP_DST_PORT }, 321 { "src-port", LOOKUP_SRC_PORT }, 322 { "dst-mac", LOOKUP_DST_MAC }, 323 { "src-mac", LOOKUP_SRC_MAC }, 324 { "uid", LOOKUP_UID }, 325 { "jail", LOOKUP_JAIL }, 326 { "dscp", LOOKUP_DSCP }, 327 { "mark", LOOKUP_MARK }, 328 { "rulenum", LOOKUP_RULENUM }, 329 { NULL, 0 }, 330 }; 331 332 /* 333 * table(name,valuename=value) instruction accepts one of the 334 * following arguments as valuename. 335 */ 336 static struct _s_x tvalue_names[] = { 337 { "tag", TVALUE_TAG }, 338 { "pipe", TVALUE_PIPE }, 339 { "divert", TVALUE_DIVERT }, 340 { "skipto", TVALUE_SKIPTO }, 341 { "netgraph", TVALUE_NETGRAPH }, 342 { "fib", TVALUE_FIB }, 343 { "nat", TVALUE_NAT }, 344 { "nh4", TVALUE_NH4 }, 345 { "nh6", TVALUE_NH6 }, 346 { "dscp", TVALUE_DSCP }, 347 { "limit", TVALUE_LIMIT }, 348 { "mark", TVALUE_MARK }, 349 { NULL, 0 } 350 }; 351 352 static struct _s_x rule_options[] = { 353 { "tagged", TOK_TAGGED }, 354 { "uid", TOK_UID }, 355 { "gid", TOK_GID }, 356 { "jail", TOK_JAIL }, 357 { "in", TOK_IN }, 358 { "limit", TOK_LIMIT }, 359 { "set-limit", TOK_SETLIMIT }, 360 { "keep-state", TOK_KEEPSTATE }, 361 { "record-state", TOK_RECORDSTATE }, 362 { "bridged", TOK_LAYER2 }, 363 { "layer2", TOK_LAYER2 }, 364 { "out", TOK_OUT }, 365 { "diverted", TOK_DIVERTED }, 366 { "diverted-loopback", TOK_DIVERTEDLOOPBACK }, 367 { "diverted-output", TOK_DIVERTEDOUTPUT }, 368 { "xmit", TOK_XMIT }, 369 { "recv", TOK_RECV }, 370 { "via", TOK_VIA }, 371 { "fragment", TOK_FRAG }, 372 { "frag", TOK_FRAG }, 373 { "fib", TOK_FIB }, 374 { "ipoptions", TOK_IPOPTS }, 375 { "ipopts", TOK_IPOPTS }, 376 { "iplen", TOK_IPLEN }, 377 { "ipid", TOK_IPID }, 378 { "ipprecedence", TOK_IPPRECEDENCE }, 379 { "dscp", TOK_DSCP }, 380 { "iptos", TOK_IPTOS }, 381 { "ipttl", TOK_IPTTL }, 382 { "ipversion", TOK_IPVER }, 383 { "ipver", TOK_IPVER }, 384 { "estab", TOK_ESTAB }, 385 { "established", TOK_ESTAB }, 386 { "setup", TOK_SETUP }, 387 { "sockarg", TOK_SOCKARG }, 388 { "tcpdatalen", TOK_TCPDATALEN }, 389 { "tcpflags", TOK_TCPFLAGS }, 390 { "tcpflgs", TOK_TCPFLAGS }, 391 { "tcpmss", TOK_TCPMSS }, 392 { "tcpoptions", TOK_TCPOPTS }, 393 { "tcpopts", TOK_TCPOPTS }, 394 { "tcpseq", TOK_TCPSEQ }, 395 { "tcpack", TOK_TCPACK }, 396 { "tcpwin", TOK_TCPWIN }, 397 { "icmptype", TOK_ICMPTYPES }, 398 { "icmptypes", TOK_ICMPTYPES }, 399 { "dst-ip", TOK_DSTIP }, 400 { "src-ip", TOK_SRCIP }, 401 { "dst-port", TOK_DSTPORT }, 402 { "src-port", TOK_SRCPORT }, 403 { "dst-mac", TOK_DSTMAC }, 404 { "src-mac", TOK_SRCMAC }, 405 { "proto", TOK_PROTO }, 406 { "MAC", TOK_MAC }, 407 { "mac", TOK_MAC }, 408 { "mac-type", TOK_MACTYPE }, 409 { "verrevpath", TOK_VERREVPATH }, 410 { "versrcreach", TOK_VERSRCREACH }, 411 { "antispoof", TOK_ANTISPOOF }, 412 { "ipsec", TOK_IPSEC }, 413 { "icmp6type", TOK_ICMP6TYPES }, 414 { "icmp6types", TOK_ICMP6TYPES }, 415 { "ext6hdr", TOK_EXT6HDR }, 416 { "flow-id", TOK_FLOWID }, 417 { "ipv6", TOK_IPV6 }, 418 { "ip6", TOK_IPV6 }, 419 { "ipv4", TOK_IPV4 }, 420 { "ip4", TOK_IPV4 }, 421 { "dst-ipv6", TOK_DSTIP6 }, 422 { "dst-ip6", TOK_DSTIP6 }, 423 { "src-ipv6", TOK_SRCIP6 }, 424 { "src-ip6", TOK_SRCIP6 }, 425 { "lookup", TOK_LOOKUP }, 426 { "flow", TOK_FLOW }, 427 { "mark", TOK_MARK }, 428 { "defer-action", TOK_SKIPACTION }, 429 { "defer-immediate-action", TOK_SKIPACTION }, 430 { "//", TOK_COMMENT }, 431 432 { "not", TOK_NOT }, /* pseudo option */ 433 { "!", /* escape ? */ TOK_NOT }, /* pseudo option */ 434 { "or", TOK_OR }, /* pseudo option */ 435 { "|", /* escape */ TOK_OR }, /* pseudo option */ 436 { "{", TOK_STARTBRACE }, /* pseudo option */ 437 { "(", TOK_STARTBRACE }, /* pseudo option */ 438 { "}", TOK_ENDBRACE }, /* pseudo option */ 439 { ")", TOK_ENDBRACE }, /* pseudo option */ 440 { NULL, 0 } /* terminator */ 441 }; 442 443 void bprint_uint_arg(struct buf_pr *bp, const char *str, uint32_t arg); 444 static int ipfw_get_config(struct cmdline_opts *co, struct format_opts *fo, 445 ipfw_cfg_lheader **pcfg, size_t *psize); 446 static int ipfw_show_config(struct cmdline_opts *co, struct format_opts *fo, 447 ipfw_cfg_lheader *cfg, size_t sz, int ac, char **av); 448 static void ipfw_list_tifaces(void); 449 450 struct tidx; 451 static uint32_t pack_object(struct tidx *tstate, const char *name, int otype); 452 static uint32_t pack_table(struct tidx *tstate, const char *name); 453 454 static char *table_search_ctlv(ipfw_obj_ctlv *ctlv, uint32_t idx); 455 static void object_sort_ctlv(ipfw_obj_ctlv *ctlv); 456 static char *object_search_ctlv(ipfw_obj_ctlv *ctlv, uint32_t idx, 457 uint16_t type); 458 459 int 460 is_ipfw(void) 461 { 462 return (g_co.prog == cmdline_prog_ipfw); 463 } 464 465 /* 466 * Simple string buffer API. 467 * Used to simplify buffer passing between function and for 468 * transparent overrun handling. 469 */ 470 471 /* 472 * Allocates new buffer of given size @sz. 473 * 474 * Returns 0 on success. 475 */ 476 int 477 bp_alloc(struct buf_pr *b, size_t size) 478 { 479 memset(b, 0, sizeof(struct buf_pr)); 480 481 if ((b->buf = calloc(1, size)) == NULL) 482 return (ENOMEM); 483 484 b->ptr = b->buf; 485 b->size = size; 486 b->avail = b->size; 487 488 return (0); 489 } 490 491 void 492 bp_free(struct buf_pr *b) 493 { 494 495 free(b->buf); 496 } 497 498 /* 499 * Flushes buffer so new writer start from beginning. 500 */ 501 void 502 bp_flush(struct buf_pr *b) 503 { 504 505 b->ptr = b->buf; 506 b->avail = b->size; 507 b->buf[0] = '\0'; 508 } 509 510 /* 511 * Print message specified by @format and args. 512 * Automatically manage buffer space and transparently handle 513 * buffer overruns. 514 * 515 * Returns number of bytes that should have been printed. 516 */ 517 int 518 bprintf(struct buf_pr *b, const char *format, ...) 519 { 520 va_list args; 521 int i; 522 523 va_start(args, format); 524 525 i = vsnprintf(b->ptr, b->avail, format, args); 526 va_end(args); 527 528 if (i < 0 || (size_t)i > b->avail) { 529 /* Overflow or print error */ 530 b->avail = 0; 531 } else { 532 b->ptr += i; 533 b->avail -= i; 534 } 535 536 b->needed += i; 537 538 return (i); 539 } 540 541 /* 542 * Special values printer for tablearg-aware opcodes. 543 */ 544 void 545 bprint_uint_arg(struct buf_pr *bp, const char *str, uint32_t arg) 546 { 547 548 if (str != NULL) 549 bprintf(bp, "%s", str); 550 if (arg == IP_FW_TARG) 551 bprintf(bp, "tablearg"); 552 else 553 bprintf(bp, "%u", arg); 554 } 555 556 /* 557 * Helper routine to print a possibly unaligned uint64_t on 558 * various platform. If width > 0, print the value with 559 * the desired width, followed by a space; 560 * otherwise, return the required width. 561 */ 562 int 563 pr_u64(struct buf_pr *b, void *pd, int width) 564 { 565 #ifdef TCC 566 #define U64_FMT "I64" 567 #else 568 #define U64_FMT "llu" 569 #endif 570 uint64_t u; 571 unsigned long long d; 572 573 bcopy (pd, &u, sizeof(u)); 574 d = u; 575 return (width > 0) ? 576 bprintf(b, "%*" U64_FMT " ", width, d) : 577 snprintf(NULL, 0, "%" U64_FMT, d) ; 578 #undef U64_FMT 579 } 580 581 582 void * 583 safe_calloc(size_t number, size_t size) 584 { 585 void *ret = calloc(number, size); 586 587 if (ret == NULL) 588 err(EX_OSERR, "calloc"); 589 return ret; 590 } 591 592 void * 593 safe_realloc(void *ptr, size_t size) 594 { 595 void *ret = realloc(ptr, size); 596 597 if (ret == NULL) 598 err(EX_OSERR, "realloc"); 599 return ret; 600 } 601 602 /* 603 * Compare things like interface or table names. 604 */ 605 int 606 stringnum_cmp(const char *a, const char *b) 607 { 608 int la, lb; 609 610 la = strlen(a); 611 lb = strlen(b); 612 613 if (la > lb) 614 return (1); 615 else if (la < lb) 616 return (-01); 617 618 return (strcmp(a, b)); 619 } 620 621 struct debug_header { 622 uint16_t cmd_type; 623 uint16_t spare1; 624 uint32_t opt_name; 625 uint32_t total_len; 626 uint32_t spare2; 627 }; 628 629 /* 630 * conditionally runs the command. 631 * Selected options or negative -> getsockopt 632 */ 633 int 634 do_cmd(int optname, void *optval, uintptr_t optlen) 635 { 636 int i; 637 638 if (g_co.debug_only) { 639 struct debug_header dbg = { 640 .cmd_type = 1, 641 .opt_name = optname, 642 .total_len = optlen + sizeof(struct debug_header), 643 }; 644 write(1, &dbg, sizeof(dbg)); 645 write(1, optval, optlen); 646 } 647 648 if (g_co.test_only) 649 return (0); 650 651 if (ipfw_socket == -1) 652 ipfw_socket = socket(AF_INET, SOCK_RAW, IPPROTO_RAW); 653 if (ipfw_socket < 0) 654 err(EX_UNAVAILABLE, "socket"); 655 656 if (optname == IP_FW3 || optname < 0) { 657 if (optname < 0) 658 optname = -optname; 659 i = getsockopt(ipfw_socket, IPPROTO_IP, optname, optval, 660 (socklen_t *)optlen); 661 } else { 662 i = setsockopt(ipfw_socket, IPPROTO_IP, optname, optval, optlen); 663 } 664 return (i); 665 } 666 667 /* 668 * do_set3 - pass ipfw control cmd to kernel 669 * @optname: option name 670 * @optval: pointer to option data 671 * @optlen: option length 672 * 673 * Assumes op3 header is already embedded. 674 * Calls setsockopt() with IP_FW3 as kernel-visible opcode. 675 * Returns 0 on success or errno otherwise. 676 */ 677 int 678 do_set3(int optname, ip_fw3_opheader *op3, size_t optlen) 679 { 680 681 op3->opcode = optname; 682 op3->version = IP_FW3_OPVER; /* use last version */ 683 684 if (g_co.debug_only) { 685 struct debug_header dbg = { 686 .cmd_type = 2, 687 .opt_name = optname, 688 .total_len = optlen, sizeof(struct debug_header), 689 }; 690 write(1, &dbg, sizeof(dbg)); 691 write(1, op3, optlen); 692 } 693 694 if (g_co.test_only) 695 return (0); 696 697 if (ipfw_socket == -1) 698 ipfw_socket = socket(AF_INET, SOCK_RAW, IPPROTO_RAW); 699 if (ipfw_socket < 0) 700 err(EX_UNAVAILABLE, "socket"); 701 702 703 return (setsockopt(ipfw_socket, IPPROTO_IP, IP_FW3, op3, optlen)); 704 } 705 706 /* 707 * do_get3 - pass ipfw control cmd to kernel 708 * @optname: option name 709 * @optval: pointer to option data 710 * @optlen: pointer to option length 711 * 712 * Assumes op3 header is already embedded. 713 * Calls getsockopt() with IP_FW3 as kernel-visible opcode. 714 * Returns 0 on success or errno otherwise. 715 */ 716 int 717 do_get3(int optname, ip_fw3_opheader *op3, size_t *optlen) 718 { 719 int error; 720 socklen_t len; 721 722 op3->opcode = optname; 723 op3->version = IP_FW3_OPVER; /* use last version */ 724 725 if (g_co.debug_only) { 726 struct debug_header dbg = { 727 .cmd_type = 3, 728 .opt_name = optname, 729 .total_len = *optlen + sizeof(struct debug_header), 730 }; 731 write(1, &dbg, sizeof(dbg)); 732 write(1, op3, *optlen); 733 } 734 735 if (g_co.test_only) 736 return (0); 737 738 if (ipfw_socket == -1) 739 ipfw_socket = socket(AF_INET, SOCK_RAW, IPPROTO_RAW); 740 if (ipfw_socket < 0) 741 err(EX_UNAVAILABLE, "socket"); 742 743 744 len = *optlen; 745 error = getsockopt(ipfw_socket, IPPROTO_IP, IP_FW3, op3, &len); 746 *optlen = len; 747 748 return (error); 749 } 750 751 /** 752 * match_token takes a table and a string, returns the value associated 753 * with the string (-1 in case of failure). 754 */ 755 int 756 match_token(struct _s_x *table, const char *string) 757 { 758 struct _s_x *pt; 759 uint i = strlen(string); 760 761 for (pt = table ; i && pt->s != NULL ; pt++) 762 if (strlen(pt->s) == i && !bcmp(string, pt->s, i)) 763 return pt->x; 764 return (-1); 765 } 766 767 /** 768 * match_token_relaxed takes a table and a string, returns the value associated 769 * with the string for the best match. 770 * 771 * Returns: 772 * value from @table for matched records 773 * -1 for non-matched records 774 * -2 if more than one records match @string. 775 */ 776 int 777 match_token_relaxed(struct _s_x *table, const char *string) 778 { 779 struct _s_x *pt, *m; 780 int i, c; 781 782 i = strlen(string); 783 c = 0; 784 785 for (pt = table ; i != 0 && pt->s != NULL ; pt++) { 786 if (strncmp(pt->s, string, i) != 0) 787 continue; 788 m = pt; 789 c++; 790 } 791 792 if (c == 1) 793 return (m->x); 794 795 return (c > 0 ? -2: -1); 796 } 797 798 int 799 get_token(struct _s_x *table, const char *string, const char *errbase) 800 { 801 int tcmd; 802 803 if ((tcmd = match_token_relaxed(table, string)) < 0) 804 errx(EX_USAGE, "%s %s %s", 805 (tcmd == 0) ? "invalid" : "ambiguous", errbase, string); 806 807 return (tcmd); 808 } 809 810 /** 811 * match_value takes a table and a value, returns the string associated 812 * with the value (NULL in case of failure). 813 */ 814 char const * 815 match_value(struct _s_x *p, int value) 816 { 817 for (; p->s != NULL; p++) 818 if (p->x == value) 819 return p->s; 820 return NULL; 821 } 822 823 size_t 824 concat_tokens(char *buf, size_t bufsize, struct _s_x *table, 825 const char *delimiter) 826 { 827 struct _s_x *pt; 828 int l; 829 size_t sz; 830 831 for (sz = 0, pt = table ; pt->s != NULL; pt++) { 832 l = snprintf(buf + sz, bufsize - sz, "%s%s", 833 (sz == 0) ? "" : delimiter, pt->s); 834 sz += l; 835 bufsize += l; 836 if (sz > bufsize) 837 return (bufsize); 838 } 839 840 return (sz); 841 } 842 843 /* 844 * helper function to process a set of flags and set bits in the 845 * appropriate masks. 846 */ 847 int 848 fill_flags(struct _s_x *flags, char *p, char **e, uint32_t *set, 849 uint32_t *clear) 850 { 851 char *q; /* points to the separator */ 852 int val; 853 uint32_t *which; /* mask we are working on */ 854 855 while (p && *p) { 856 if (*p == '!') { 857 p++; 858 which = clear; 859 } else 860 which = set; 861 q = strchr(p, ','); 862 if (q) 863 *q++ = '\0'; 864 val = match_token(flags, p); 865 if (val <= 0) { 866 if (e != NULL) 867 *e = p; 868 return (-1); 869 } 870 *which |= (uint32_t)val; 871 p = q; 872 } 873 return (0); 874 } 875 876 void 877 print_flags_buffer(char *buf, size_t sz, struct _s_x *list, uint32_t set) 878 { 879 char const *comma = ""; 880 int i, l; 881 882 for (i = 0; list[i].x != 0; i++) { 883 if ((set & list[i].x) == 0) 884 continue; 885 886 set &= ~list[i].x; 887 l = snprintf(buf, sz, "%s%s", comma, list[i].s); 888 if (l < 0 || (size_t)l >= sz) 889 return; 890 comma = ","; 891 buf += l; 892 sz -=l; 893 } 894 } 895 896 /* 897 * _substrcmp takes two strings and returns 1 if they do not match, 898 * and 0 if they match exactly or the first string is a sub-string 899 * of the second. A warning is printed to stderr in the case that the 900 * first string is a sub-string of the second. 901 * 902 * This function will be removed in the future through the usual 903 * deprecation process. 904 */ 905 int 906 _substrcmp(const char *str1, const char* str2) 907 { 908 909 if (strncmp(str1, str2, strlen(str1)) != 0) 910 return 1; 911 912 if (strlen(str1) != strlen(str2)) 913 warnx("DEPRECATED: '%s' matched '%s' as a sub-string", 914 str1, str2); 915 return 0; 916 } 917 918 /* 919 * _substrcmp2 takes three strings and returns 1 if the first two do not match, 920 * and 0 if they match exactly or the second string is a sub-string 921 * of the first. A warning is printed to stderr in the case that the 922 * first string does not match the third. 923 * 924 * This function exists to warn about the bizarre construction 925 * strncmp(str, "by", 2) which is used to allow people to use a shortcut 926 * for "bytes". The problem is that in addition to accepting "by", 927 * "byt", "byte", and "bytes", it also excepts "by_rabid_dogs" and any 928 * other string beginning with "by". 929 * 930 * This function will be removed in the future through the usual 931 * deprecation process. 932 */ 933 int 934 _substrcmp2(const char *str1, const char* str2, const char* str3) 935 { 936 937 if (strncmp(str1, str2, strlen(str2)) != 0) 938 return 1; 939 940 if (strcmp(str1, str3) != 0) 941 warnx("DEPRECATED: '%s' matched '%s'", 942 str1, str3); 943 return 0; 944 } 945 946 /* 947 * prints one port, symbolic or numeric 948 */ 949 static void 950 print_port(struct buf_pr *bp, int proto, uint16_t port) 951 { 952 953 if (proto == IPPROTO_ETHERTYPE) { 954 char const *s; 955 956 if (g_co.do_resolv && (s = match_value(ether_types, port)) ) 957 bprintf(bp, "%s", s); 958 else 959 bprintf(bp, "0x%04x", port); 960 } else { 961 struct servent *se = NULL; 962 if (g_co.do_resolv) { 963 struct protoent *pe = getprotobynumber(proto); 964 965 se = getservbyport(htons(port), pe ? pe->p_name : NULL); 966 } 967 if (se) 968 bprintf(bp, "%s", se->s_name); 969 else 970 bprintf(bp, "%d", port); 971 } 972 } 973 974 static struct _s_x _port_name[] = { 975 {"dst-port", O_IP_DSTPORT}, 976 {"src-port", O_IP_SRCPORT}, 977 {"ipid", O_IPID}, 978 {"iplen", O_IPLEN}, 979 {"ipttl", O_IPTTL}, 980 {"mac-type", O_MAC_TYPE}, 981 {"tcpdatalen", O_TCPDATALEN}, 982 {"tcpmss", O_TCPMSS}, 983 {"tcpwin", O_TCPWIN}, 984 {"tagged", O_TAGGED}, 985 {NULL, 0} 986 }; 987 988 /* 989 * Print the values in a list 16-bit items of the types above. 990 * XXX todo: add support for mask. 991 */ 992 static void 993 print_newports(struct buf_pr *bp, const ipfw_insn_u16 *cmd, int proto, int opcode) 994 { 995 const uint16_t *p = cmd->ports; 996 int i; 997 char const *sep; 998 999 if (opcode != 0) { 1000 sep = match_value(_port_name, opcode); 1001 if (sep == NULL) 1002 sep = "???"; 1003 bprintf(bp, " %s", sep); 1004 } 1005 sep = " "; 1006 for (i = F_LEN((const ipfw_insn *)cmd) - 1; i > 0; i--, p += 2) { 1007 bprintf(bp, "%s", sep); 1008 print_port(bp, proto, p[0]); 1009 if (p[0] != p[1]) { 1010 bprintf(bp, "-"); 1011 print_port(bp, proto, p[1]); 1012 } 1013 sep = ","; 1014 } 1015 } 1016 1017 /* 1018 * Like strtol, but also translates service names into port numbers 1019 * for some protocols. 1020 * In particular: 1021 * proto == -1 disables the protocol check; 1022 * proto == IPPROTO_ETHERTYPE looks up an internal table 1023 * proto == <some value in /etc/protocols> matches the values there. 1024 * Returns *end == s in case the parameter is not found. 1025 */ 1026 static int 1027 strtoport(char *s, char **end, int base, int proto) 1028 { 1029 char *p, *buf; 1030 char *s1; 1031 int i; 1032 1033 *end = s; /* default - not found */ 1034 if (*s == '\0') 1035 return 0; /* not found */ 1036 1037 if (isdigit(*s)) 1038 return strtol(s, end, base); 1039 1040 /* 1041 * find separator. '\\' escapes the next char. 1042 */ 1043 for (s1 = s; *s1 && (isalnum(*s1) || *s1 == '\\' || 1044 *s1 == '_' || *s1 == '.') ; s1++) 1045 if (*s1 == '\\' && s1[1] != '\0') 1046 s1++; 1047 1048 buf = safe_calloc(s1 - s + 1, 1); 1049 1050 /* 1051 * copy into a buffer skipping backslashes 1052 */ 1053 for (p = s, i = 0; p != s1 ; p++) 1054 if (*p != '\\') 1055 buf[i++] = *p; 1056 buf[i++] = '\0'; 1057 1058 if (proto == IPPROTO_ETHERTYPE) { 1059 i = match_token(ether_types, buf); 1060 free(buf); 1061 if (i != -1) { /* found */ 1062 *end = s1; 1063 return i; 1064 } 1065 } else { 1066 struct protoent *pe = NULL; 1067 struct servent *se; 1068 1069 if (proto != 0) 1070 pe = getprotobynumber(proto); 1071 setservent(1); 1072 se = getservbyname(buf, pe ? pe->p_name : NULL); 1073 free(buf); 1074 if (se != NULL) { 1075 *end = s1; 1076 return ntohs(se->s_port); 1077 } 1078 } 1079 return 0; /* not found */ 1080 } 1081 1082 /* 1083 * Fill the body of the command with the list of port ranges. 1084 */ 1085 static int 1086 fill_newports(ipfw_insn_u16 *cmd, char *av, int proto, int cblen) 1087 { 1088 uint16_t a, b, *p = cmd->ports; 1089 int i = 0; 1090 char *s = av; 1091 1092 while (*s) { 1093 a = strtoport(av, &s, 0, proto); 1094 if (s == av) /* empty or invalid argument */ 1095 return (0); 1096 1097 CHECK_LENGTH(cblen, i + 2); 1098 1099 switch (*s) { 1100 case '-': /* a range */ 1101 av = s + 1; 1102 b = strtoport(av, &s, 0, proto); 1103 /* Reject expressions like '1-abc' or '1-2-3'. */ 1104 if (s == av || (*s != ',' && *s != '\0')) 1105 return (0); 1106 p[0] = a; 1107 p[1] = b; 1108 break; 1109 case ',': /* comma separated list */ 1110 case '\0': 1111 p[0] = p[1] = a; 1112 break; 1113 default: 1114 warnx("port list: invalid separator <%c> in <%s>", 1115 *s, av); 1116 return (0); 1117 } 1118 1119 i++; 1120 p += 2; 1121 av = s + 1; 1122 } 1123 if (i > 0) { 1124 if (i + 1 > F_LEN_MASK) 1125 errx(EX_DATAERR, "too many ports/ranges\n"); 1126 cmd->o.len |= i + 1; /* leave F_NOT and F_OR untouched */ 1127 } 1128 return (i); 1129 } 1130 1131 /* 1132 * Fill the body of the command with the list of DiffServ codepoints. 1133 */ 1134 static void 1135 fill_dscp(ipfw_insn *cmd, char *av, int cblen) 1136 { 1137 uint32_t *low, *high; 1138 char *s = av, *a; 1139 int code; 1140 1141 cmd->opcode = O_DSCP; 1142 cmd->len |= F_INSN_SIZE(ipfw_insn_u32) + 1; 1143 1144 CHECK_CMDLEN; 1145 1146 low = (uint32_t *)(cmd + 1); 1147 high = low + 1; 1148 1149 *low = 0; 1150 *high = 0; 1151 1152 while (s != NULL) { 1153 a = strchr(s, ','); 1154 1155 if (a != NULL) 1156 *a++ = '\0'; 1157 1158 if (isalpha(*s)) { 1159 if ((code = match_token(f_ipdscp, s)) == -1) 1160 errx(EX_DATAERR, "Unknown DSCP code"); 1161 } else { 1162 code = strtoul(s, NULL, 10); 1163 if (code < 0 || code > 63) 1164 errx(EX_DATAERR, "Invalid DSCP value"); 1165 } 1166 1167 if (code >= 32) 1168 *high |= 1 << (code - 32); 1169 else 1170 *low |= 1 << code; 1171 1172 s = a; 1173 } 1174 } 1175 1176 /* 1177 * Fill the body of the command with mark value and mask. 1178 */ 1179 static void 1180 fill_mark(ipfw_insn *cmd, char *av, int cblen) 1181 { 1182 uint32_t *value, *mask; 1183 char *value_str; 1184 1185 cmd->opcode = O_MARK; 1186 cmd->len |= F_INSN_SIZE(ipfw_insn_u32) + 1; 1187 1188 CHECK_CMDLEN; 1189 1190 value = (uint32_t *)(cmd + 1); 1191 mask = value + 1; 1192 1193 value_str = strsep(&av, ":"); 1194 1195 if (strcmp(value_str, "tablearg") == 0) { 1196 cmd->arg1 = IP_FW_TARG; 1197 *value = 0; 1198 } else { 1199 /* This is not a tablearg */ 1200 cmd->arg1 |= 0x8000; 1201 *value = strtoul(value_str, NULL, 0); 1202 } 1203 if (av) 1204 *mask = strtoul(av, NULL, 0); 1205 else 1206 *mask = 0xFFFFFFFF; 1207 1208 if ((*value & *mask) != *value) 1209 errx(EX_DATAERR, "Static mark value: some bits in value are" 1210 " set that will be masked out by mask " 1211 "(%#x & %#x) = %#x != %#x", 1212 *value, *mask, (*value & *mask), *value); 1213 } 1214 1215 static struct _s_x icmpcodes[] = { 1216 { "net", ICMP_UNREACH_NET }, 1217 { "host", ICMP_UNREACH_HOST }, 1218 { "protocol", ICMP_UNREACH_PROTOCOL }, 1219 { "port", ICMP_UNREACH_PORT }, 1220 { "needfrag", ICMP_UNREACH_NEEDFRAG }, 1221 { "srcfail", ICMP_UNREACH_SRCFAIL }, 1222 { "net-unknown", ICMP_UNREACH_NET_UNKNOWN }, 1223 { "host-unknown", ICMP_UNREACH_HOST_UNKNOWN }, 1224 { "isolated", ICMP_UNREACH_ISOLATED }, 1225 { "net-prohib", ICMP_UNREACH_NET_PROHIB }, 1226 { "host-prohib", ICMP_UNREACH_HOST_PROHIB }, 1227 { "tosnet", ICMP_UNREACH_TOSNET }, 1228 { "toshost", ICMP_UNREACH_TOSHOST }, 1229 { "filter-prohib", ICMP_UNREACH_FILTER_PROHIB }, 1230 { "host-precedence", ICMP_UNREACH_HOST_PRECEDENCE }, 1231 { "precedence-cutoff", ICMP_UNREACH_PRECEDENCE_CUTOFF }, 1232 { NULL, 0 } 1233 }; 1234 1235 static uint16_t 1236 get_reject_code(const char *str) 1237 { 1238 int val; 1239 char *s; 1240 1241 val = strtoul(str, &s, 0); 1242 if (s == str || *s != '\0' || val >= 0x100) 1243 val = match_token(icmpcodes, str); 1244 if (val < 0) 1245 errx(EX_DATAERR, "unknown ICMP unreachable code ``%s''", str); 1246 return (val); 1247 } 1248 1249 static void 1250 print_reject_code(struct buf_pr *bp, uint16_t code) 1251 { 1252 char const *s; 1253 1254 if ((s = match_value(icmpcodes, code)) != NULL) 1255 bprintf(bp, "unreach %s", s); 1256 else 1257 bprintf(bp, "unreach %u", code); 1258 } 1259 1260 /* 1261 * Returns the number of bits set (from left) in a contiguous bitmask, 1262 * or -1 if the mask is not contiguous. 1263 * XXX this needs a proper fix. 1264 * This effectively works on masks in big-endian (network) format. 1265 * when compiled on little endian architectures. 1266 * 1267 * First bit is bit 7 of the first byte -- note, for MAC addresses, 1268 * the first bit on the wire is bit 0 of the first byte. 1269 * len is the max length in bits. 1270 */ 1271 int 1272 contigmask(const uint8_t *p, int len) 1273 { 1274 int i, n; 1275 1276 for (i=0; i<len ; i++) 1277 if ( (p[i/8] & (1 << (7 - (i%8)))) == 0) /* first bit unset */ 1278 break; 1279 for (n=i+1; n < len; n++) 1280 if ( (p[n/8] & (1 << (7 - (n%8)))) != 0) 1281 return -1; /* mask not contiguous */ 1282 return i; 1283 } 1284 1285 /* 1286 * print flags set/clear in the two bitmasks passed as parameters. 1287 * There is a specialized check for f_tcpflags. 1288 */ 1289 static void 1290 print_flags(struct buf_pr *bp, char const *name, const ipfw_insn *cmd, 1291 struct _s_x *list) 1292 { 1293 char const *comma = ""; 1294 int i; 1295 uint8_t set = cmd->arg1 & 0xff; 1296 uint8_t clear = (cmd->arg1 >> 8) & 0xff; 1297 1298 if (list == f_tcpflags && set == TH_SYN && clear == TH_ACK) { 1299 bprintf(bp, " setup"); 1300 return; 1301 } 1302 1303 bprintf(bp, " %s ", name); 1304 for (i=0; list[i].x != 0; i++) { 1305 if (set & list[i].x) { 1306 set &= ~list[i].x; 1307 bprintf(bp, "%s%s", comma, list[i].s); 1308 comma = ","; 1309 } 1310 if (clear & list[i].x) { 1311 clear &= ~list[i].x; 1312 bprintf(bp, "%s!%s", comma, list[i].s); 1313 comma = ","; 1314 } 1315 } 1316 } 1317 1318 static void 1319 print_tvalue(struct buf_pr *bp, const ipfw_insn_lookup *cmd) 1320 { 1321 char maskbuf[INET6_ADDRSTRLEN]; 1322 const char *name; 1323 1324 name = match_value(tvalue_names, IPFW_TVALUE_TYPE(&cmd->o)); 1325 switch(IPFW_TVALUE_TYPE(&cmd->o)) { 1326 case TVALUE_NH6: 1327 if (inet_ntop(AF_INET6, &insntoc(&cmd->o, lookup)->ip6, 1328 maskbuf, sizeof(maskbuf)) == NULL) 1329 strcpy(maskbuf, "<invalid>"); 1330 bprintf(bp, ",%s=%s", name != NULL ? name: "<invalid>", 1331 maskbuf); 1332 return; 1333 case TVALUE_NH4: 1334 bprintf(bp, ",%s=%s", name != NULL ? name: "<invalid>", 1335 inet_ntoa(cmd->ip4)); 1336 return; 1337 } 1338 bprintf(bp, ",%s=%u", name != NULL ? name: "<invalid>", 1339 cmd->u32); 1340 } 1341 1342 1343 /* 1344 * Print the ip address contained in a command. 1345 */ 1346 static void 1347 print_ip(struct buf_pr *bp, const struct format_opts *fo, 1348 const ipfw_insn_ip *cmd) 1349 { 1350 char maskbuf[INET6_ADDRSTRLEN]; 1351 const uint32_t *a = insntoc(cmd, u32)->d; 1352 struct hostent *he = NULL; 1353 const struct in_addr *ia; 1354 const ipfw_insn_lookup *l = insntoc(cmd, lookup); 1355 const char *key; 1356 char *t; 1357 uint32_t len = F_LEN(&cmd->o); 1358 1359 bprintf(bp, " "); 1360 switch (cmd->o.opcode) { 1361 case O_IP_SRC_ME: 1362 case O_IP_DST_ME: 1363 bprintf(bp, "me"); 1364 return; 1365 1366 case O_TABLE_LOOKUP: { 1367 key = match_value(lookup_keys, 1368 IPFW_LOOKUP_TYPE(&cmd->o)); 1369 t = table_search_ctlv(fo->tstate, 1370 insntoc(&cmd->o, kidx)->kidx); 1371 if (IPFW_LOOKUP_MASKING(&cmd->o) == 0 || 1372 len != F_INSN_SIZE(ipfw_insn_lookup)) { 1373 bprintf(bp, "lookup %s %s", 1374 (key != NULL ? key : "<invalid>"), t); 1375 return; 1376 } 1377 switch (IPFW_LOOKUP_TYPE(&cmd->o)) { 1378 case LOOKUP_DST_IP6: 1379 case LOOKUP_SRC_IP6: 1380 if (inet_ntop(AF_INET6, &l->ip6, 1381 maskbuf, sizeof(maskbuf)) == NULL) 1382 strcpy(maskbuf, "<invalid>"); 1383 bprintf(bp, "lookup %s:%s %s", key, maskbuf, t); 1384 break; 1385 case LOOKUP_DST_IP: 1386 case LOOKUP_SRC_IP: 1387 case LOOKUP_DST_IP4: 1388 case LOOKUP_SRC_IP4: 1389 bprintf(bp, "lookup %s:%s %s", key, 1390 inet_ntoa(l->ip4), t); 1391 break; 1392 case LOOKUP_DST_MAC: 1393 case LOOKUP_SRC_MAC: 1394 bprintf(bp, "lookup %s:%s %s", key, 1395 ether_ntoa((const struct ether_addr *)&l->mac), t); 1396 break; 1397 default: 1398 bprintf(bp, "lookup %s:%#x %s", 1399 (key != NULL ? key : "<invalid>"), 1400 l->u32, t); 1401 } 1402 return; 1403 } 1404 case O_IP_DST_LOOKUP: 1405 case O_IP_SRC_LOOKUP: 1406 t = table_search_ctlv(fo->tstate, 1407 insntoc(&cmd->o, kidx)->kidx); 1408 /* 1409 * XXX: compatibility layer, to be removed. 1410 * Properly show rules loaded into new kernel modules by 1411 * an old ipfw binary. 1412 */ 1413 if (IPFW_LOOKUP_MASKING(&cmd->o) != 0 && 1414 len == F_INSN_SIZE(ipfw_insn_table)) { 1415 key = match_value(lookup_keys, 1416 IPFW_LOOKUP_TYPE(&cmd->o)); 1417 bprintf(bp, "lookup %s:%#x %s", 1418 (key != NULL ? key : "<invalid>"), 1419 insntoc(&cmd->o, table)->value, t); 1420 return; 1421 } 1422 bprintf(bp, "table(%s", t); 1423 if (IPFW_LOOKUP_MATCH_TVALUE(&cmd->o) != 0) 1424 print_tvalue(bp, l); 1425 bprintf(bp, ")"); 1426 return; 1427 } 1428 1429 if (cmd->o.opcode == O_IP_SRC_SET || cmd->o.opcode == O_IP_DST_SET) { 1430 const uint32_t *map = (const uint32_t *)&cmd->mask; 1431 struct in_addr addr; 1432 uint32_t x; 1433 int i, j; 1434 char comma = '{'; 1435 1436 x = cmd->o.arg1 - 1; 1437 x = htonl(~x); 1438 addr.s_addr = htonl(cmd->addr.s_addr); 1439 bprintf(bp, "%s/%d", inet_ntoa(addr), 1440 contigmask((uint8_t *)&x, 32)); 1441 x = cmd->addr.s_addr; 1442 x &= 0xff; /* base */ 1443 /* 1444 * Print bits and ranges. 1445 * Locate first bit set (i), then locate first bit unset (j). 1446 * If we have 3+ consecutive bits set, then print them as a 1447 * range, otherwise only print the initial bit and rescan. 1448 */ 1449 for (i=0; i < cmd->o.arg1; i++) 1450 if (map[i/32] & (1<<(i & 31))) { 1451 for (j=i+1; j < cmd->o.arg1; j++) 1452 if (!(map[ j/32] & (1<<(j & 31)))) 1453 break; 1454 bprintf(bp, "%c%d", comma, i+x); 1455 if (j>i+2) { /* range has at least 3 elements */ 1456 bprintf(bp, "-%d", j-1+x); 1457 i = j-1; 1458 } 1459 comma = ','; 1460 } 1461 bprintf(bp, "}"); 1462 return; 1463 } 1464 /* 1465 * len == 2 indicates a single IP, whereas lists of 1 or more 1466 * addr/mask pairs have len = (2n+1). We convert len to n so we 1467 * use that to count the number of entries. 1468 */ 1469 for (len = len / 2; len > 0; len--, a += 2) { 1470 int mb = /* mask length */ 1471 (cmd->o.opcode == O_IP_SRC || cmd->o.opcode == O_IP_DST) ? 1472 32 : contigmask((const uint8_t *)&(a[1]), 32); 1473 if (mb == 32 && g_co.do_resolv) 1474 he = gethostbyaddr((const char *)&(a[0]), sizeof(in_addr_t), 1475 AF_INET); 1476 if (he != NULL) /* resolved to name */ 1477 bprintf(bp, "%s", he->h_name); 1478 else if (mb == 0) /* any */ 1479 bprintf(bp, "any"); 1480 else { /* numeric IP followed by some kind of mask */ 1481 ia = (const struct in_addr *)&a[0]; 1482 bprintf(bp, "%s", inet_ntoa(*ia)); 1483 if (mb < 0) { 1484 ia = (const struct in_addr *)&a[1]; 1485 bprintf(bp, ":%s", inet_ntoa(*ia)); 1486 } else if (mb < 32) 1487 bprintf(bp, "/%d", mb); 1488 } 1489 if (len > 1) 1490 bprintf(bp, ","); 1491 } 1492 } 1493 1494 /* 1495 * prints a MAC address/mask pair 1496 */ 1497 static void 1498 format_mac(struct buf_pr *bp, const uint8_t *addr, const uint8_t *mask) 1499 { 1500 int l = contigmask(mask, 48); 1501 1502 if (l == 0) 1503 bprintf(bp, " any"); 1504 else { 1505 bprintf(bp, " %02x:%02x:%02x:%02x:%02x:%02x", 1506 addr[0], addr[1], addr[2], addr[3], addr[4], addr[5]); 1507 if (l == -1) 1508 bprintf(bp, "&%02x:%02x:%02x:%02x:%02x:%02x", 1509 mask[0], mask[1], mask[2], 1510 mask[3], mask[4], mask[5]); 1511 else if (l < 48) 1512 bprintf(bp, "/%d", l); 1513 } 1514 } 1515 1516 static void 1517 print_mac(struct buf_pr *bp, const ipfw_insn_mac *mac) 1518 { 1519 1520 bprintf(bp, " MAC"); 1521 format_mac(bp, mac->addr, mac->mask); 1522 format_mac(bp, mac->addr + 6, mac->mask + 6); 1523 } 1524 1525 static void 1526 print_mac_lookup(struct buf_pr *bp, const struct format_opts *fo, 1527 const ipfw_insn *cmd) 1528 { 1529 char *t; 1530 1531 bprintf(bp, " "); 1532 1533 t = table_search_ctlv(fo->tstate, insntoc(cmd, kidx)->kidx); 1534 bprintf(bp, "table(%s", t); 1535 if (IPFW_LOOKUP_MATCH_TVALUE(cmd) != 0) 1536 print_tvalue(bp, insntoc(cmd, lookup)); 1537 bprintf(bp, ")"); 1538 } 1539 1540 static void 1541 fill_icmptypes(ipfw_insn_u32 *cmd, char *av) 1542 { 1543 uint8_t type; 1544 1545 cmd->d[0] = 0; 1546 while (*av) { 1547 if (*av == ',') 1548 av++; 1549 1550 type = strtoul(av, &av, 0); 1551 1552 if (*av != ',' && *av != '\0') 1553 errx(EX_DATAERR, "invalid ICMP type"); 1554 1555 if (type > 31) 1556 errx(EX_DATAERR, "ICMP type out of range"); 1557 1558 cmd->d[0] |= 1 << type; 1559 } 1560 cmd->o.opcode = O_ICMPTYPE; 1561 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32); 1562 } 1563 1564 static void 1565 print_icmptypes(struct buf_pr *bp, const ipfw_insn_u32 *cmd) 1566 { 1567 int i; 1568 char sep= ' '; 1569 1570 bprintf(bp, " icmptypes"); 1571 for (i = 0; i < 32; i++) { 1572 if ( (cmd->d[0] & (1 << (i))) == 0) 1573 continue; 1574 bprintf(bp, "%c%d", sep, i); 1575 sep = ','; 1576 } 1577 } 1578 1579 static void 1580 print_dscp(struct buf_pr *bp, const ipfw_insn_u32 *cmd) 1581 { 1582 const uint32_t *v; 1583 const char *code; 1584 int i = 0; 1585 char sep= ' '; 1586 1587 bprintf(bp, " dscp"); 1588 v = cmd->d; 1589 while (i < 64) { 1590 if (*v & (1 << i)) { 1591 if ((code = match_value(f_ipdscp, i)) != NULL) 1592 bprintf(bp, "%c%s", sep, code); 1593 else 1594 bprintf(bp, "%c%d", sep, i); 1595 sep = ','; 1596 } 1597 1598 if ((++i % 32) == 0) 1599 v++; 1600 } 1601 } 1602 1603 struct show_state { 1604 struct ip_fw_rule *rule; 1605 const ipfw_insn_kidx *eaction; 1606 uint8_t *printed; 1607 int flags; 1608 #define HAVE_PROTO 0x0001 1609 #define HAVE_SRCIP 0x0002 1610 #define HAVE_DSTIP 0x0004 1611 #define HAVE_PROBE_STATE 0x0008 1612 int proto; 1613 int or_block; 1614 }; 1615 1616 static int 1617 init_show_state(struct show_state *state, struct ip_fw_rule *rule) 1618 { 1619 1620 state->printed = calloc(rule->cmd_len, sizeof(uint8_t)); 1621 if (state->printed == NULL) 1622 return (ENOMEM); 1623 state->rule = rule; 1624 state->eaction = NULL; 1625 state->flags = 0; 1626 state->proto = 0; 1627 state->or_block = 0; 1628 return (0); 1629 } 1630 1631 static void 1632 free_show_state(struct show_state *state) 1633 { 1634 1635 free(state->printed); 1636 } 1637 1638 static uint8_t 1639 is_printed_opcode(struct show_state *state, const ipfw_insn *cmd) 1640 { 1641 1642 return (state->printed[cmd - state->rule->cmd]); 1643 } 1644 1645 static void 1646 mark_printed(struct show_state *state, const ipfw_insn *cmd) 1647 { 1648 1649 state->printed[cmd - state->rule->cmd] = 1; 1650 } 1651 1652 static void 1653 print_limit_mask(struct buf_pr *bp, const ipfw_insn_limit *limit) 1654 { 1655 struct _s_x *p = limit_masks; 1656 char const *comma = " "; 1657 uint8_t x; 1658 1659 for (x = limit->limit_mask; p->x != 0; p++) { 1660 if ((x & p->x) == p->x) { 1661 x &= ~p->x; 1662 bprintf(bp, "%s%s", comma, p->s); 1663 comma = ","; 1664 } 1665 } 1666 bprint_uint_arg(bp, " ", limit->conn_limit); 1667 } 1668 1669 static int 1670 print_instruction(struct buf_pr *bp, const struct format_opts *fo, 1671 struct show_state *state, const ipfw_insn *cmd) 1672 { 1673 struct protoent *pe; 1674 struct passwd *pwd; 1675 struct group *grp; 1676 const char *s; 1677 double d; 1678 1679 if (is_printed_opcode(state, cmd)) 1680 return (0); 1681 if ((cmd->len & F_OR) != 0 && state->or_block == 0) 1682 bprintf(bp, " {"); 1683 if (cmd->opcode != O_IN && (cmd->len & F_NOT) != 0) 1684 bprintf(bp, " not"); 1685 1686 switch (cmd->opcode) { 1687 case O_PROB: 1688 d = 1.0 * insntoc(cmd, u32)->d[0] / 0x7fffffff; 1689 bprintf(bp, "prob %f ", d); 1690 break; 1691 case O_PROBE_STATE: /* no need to print anything here */ 1692 state->flags |= HAVE_PROBE_STATE; 1693 break; 1694 case O_IP_SRC: 1695 case O_IP_SRC_LOOKUP: 1696 case O_IP_SRC_MASK: 1697 case O_IP_SRC_ME: 1698 case O_IP_SRC_SET: 1699 if (state->flags & HAVE_SRCIP) 1700 bprintf(bp, " src-ip"); 1701 /* FALLTHROUGH */ 1702 case O_TABLE_LOOKUP: 1703 print_ip(bp, fo, insntoc(cmd, ip)); 1704 break; 1705 case O_IP_DST: 1706 case O_IP_DST_MASK: 1707 case O_IP_DST_ME: 1708 case O_IP_DST_SET: 1709 case O_IP_DST_LOOKUP: 1710 /* 1711 * Special handling for O_IP_DST_LOOKUP when 1712 * lookup type is not LOOKUP_NONE. 1713 */ 1714 if ((state->flags & HAVE_DSTIP) != 0 && ( 1715 cmd->opcode != O_IP_DST_LOOKUP || 1716 IPFW_LOOKUP_TYPE(cmd) == LOOKUP_NONE)) 1717 bprintf(bp, " dst-ip"); 1718 print_ip(bp, fo, insntoc(cmd, ip)); 1719 break; 1720 case O_IP6_SRC: 1721 case O_IP6_SRC_MASK: 1722 case O_IP6_SRC_ME: 1723 if (state->flags & HAVE_SRCIP) 1724 bprintf(bp, " src-ip6"); 1725 print_ip6(bp, insntoc(cmd, ip6)); 1726 break; 1727 case O_IP6_DST: 1728 case O_IP6_DST_MASK: 1729 case O_IP6_DST_ME: 1730 if (state->flags & HAVE_DSTIP) 1731 bprintf(bp, " dst-ip6"); 1732 print_ip6(bp, insntoc(cmd, ip6)); 1733 break; 1734 case O_MAC_SRC_LOOKUP: 1735 bprintf(bp, " src-mac"); 1736 print_mac_lookup(bp, fo, cmd); 1737 break; 1738 case O_MAC_DST_LOOKUP: 1739 bprintf(bp, " dst-mac"); 1740 print_mac_lookup(bp, fo, cmd); 1741 break; 1742 case O_FLOW6ID: 1743 print_flow6id(bp, insntoc(cmd, u32)); 1744 break; 1745 case O_IP_DSTPORT: 1746 case O_IP_SRCPORT: 1747 print_newports(bp, insntoc(cmd, u16), state->proto, 1748 (state->flags & (HAVE_SRCIP | HAVE_DSTIP)) == 1749 (HAVE_SRCIP | HAVE_DSTIP) ? cmd->opcode: 0); 1750 break; 1751 case O_PROTO: 1752 pe = getprotobynumber(cmd->arg1); 1753 if (state->flags & HAVE_PROTO) 1754 bprintf(bp, " proto"); 1755 if (pe != NULL) 1756 bprintf(bp, " %s", pe->p_name); 1757 else 1758 bprintf(bp, " %u", cmd->arg1); 1759 state->proto = cmd->arg1; 1760 break; 1761 case O_MACADDR2: 1762 print_mac(bp, insntoc(cmd, mac)); 1763 break; 1764 case O_MAC_TYPE: 1765 print_newports(bp, insntoc(cmd, u16), 1766 IPPROTO_ETHERTYPE, cmd->opcode); 1767 break; 1768 case O_FRAG: 1769 print_flags(bp, "frag", cmd, f_ipoff); 1770 break; 1771 case O_FIB: 1772 bprintf(bp, " fib %u", cmd->arg1); 1773 break; 1774 case O_SOCKARG: 1775 bprintf(bp, " sockarg"); 1776 break; 1777 case O_IN: 1778 bprintf(bp, cmd->len & F_NOT ? " out" : " in"); 1779 break; 1780 case O_DIVERTED: 1781 switch (cmd->arg1) { 1782 case 3: 1783 bprintf(bp, " diverted"); 1784 break; 1785 case 2: 1786 bprintf(bp, " diverted-output"); 1787 break; 1788 case 1: 1789 bprintf(bp, " diverted-loopback"); 1790 break; 1791 default: 1792 bprintf(bp, " diverted-?<%u>", cmd->arg1); 1793 break; 1794 } 1795 break; 1796 case O_LAYER2: 1797 bprintf(bp, " layer2"); 1798 break; 1799 case O_XMIT: 1800 case O_RECV: 1801 case O_VIA: 1802 if (cmd->opcode == O_XMIT) 1803 s = "xmit"; 1804 else if (cmd->opcode == O_RECV) 1805 s = "recv"; 1806 else /* if (cmd->opcode == O_VIA) */ 1807 s = "via"; 1808 switch (insntoc(cmd, if)->name[0]) { 1809 case '\0': 1810 bprintf(bp, " %s %s", s, 1811 inet_ntoa(insntoc(cmd, if)->p.ip)); 1812 break; 1813 case '\1': 1814 bprintf(bp, " %s table(%s)", s, 1815 table_search_ctlv(fo->tstate, 1816 insntoc(cmd, if)->p.kidx)); 1817 break; 1818 default: 1819 bprintf(bp, " %s %s", s, 1820 insntoc(cmd, if)->name); 1821 } 1822 break; 1823 case O_IP_FLOW_LOOKUP: 1824 s = table_search_ctlv(fo->tstate, 1825 insntoc(cmd, kidx)->kidx); 1826 bprintf(bp, " flow table(%s", s); 1827 if (IPFW_LOOKUP_MATCH_TVALUE(cmd) != 0) 1828 print_tvalue(bp, insntoc(cmd, lookup)); 1829 bprintf(bp, ")"); 1830 break; 1831 case O_IPID: 1832 case O_IPTTL: 1833 case O_IPLEN: 1834 case O_TCPDATALEN: 1835 case O_TCPMSS: 1836 case O_TCPWIN: 1837 if (F_LEN(cmd) == 1) { 1838 switch (cmd->opcode) { 1839 case O_IPID: 1840 s = "ipid"; 1841 break; 1842 case O_IPTTL: 1843 s = "ipttl"; 1844 break; 1845 case O_IPLEN: 1846 s = "iplen"; 1847 break; 1848 case O_TCPDATALEN: 1849 s = "tcpdatalen"; 1850 break; 1851 case O_TCPMSS: 1852 s = "tcpmss"; 1853 break; 1854 case O_TCPWIN: 1855 s = "tcpwin"; 1856 break; 1857 default: 1858 s = "<unknown>"; 1859 break; 1860 } 1861 bprintf(bp, " %s %u", s, cmd->arg1); 1862 } else 1863 print_newports(bp, insntoc(cmd, u16), 0, 1864 cmd->opcode); 1865 break; 1866 case O_IPVER: 1867 bprintf(bp, " ipver %u", cmd->arg1); 1868 break; 1869 case O_IPPRECEDENCE: 1870 bprintf(bp, " ipprecedence %u", cmd->arg1 >> 5); 1871 break; 1872 case O_DSCP: 1873 print_dscp(bp, insntoc(cmd, u32)); 1874 break; 1875 case O_IPOPT: 1876 print_flags(bp, "ipoptions", cmd, f_ipopts); 1877 break; 1878 case O_IPTOS: 1879 print_flags(bp, "iptos", cmd, f_iptos); 1880 break; 1881 case O_ICMPTYPE: 1882 print_icmptypes(bp, insntoc(cmd, u32)); 1883 break; 1884 case O_ESTAB: 1885 bprintf(bp, " established"); 1886 break; 1887 case O_TCPFLAGS: 1888 print_flags(bp, "tcpflags", cmd, f_tcpflags); 1889 break; 1890 case O_TCPOPTS: 1891 print_flags(bp, "tcpoptions", cmd, f_tcpopts); 1892 break; 1893 case O_TCPACK: 1894 bprintf(bp, " tcpack %d", 1895 ntohl(insntoc(cmd, u32)->d[0])); 1896 break; 1897 case O_TCPSEQ: 1898 bprintf(bp, " tcpseq %d", 1899 ntohl(insntoc(cmd, u32)->d[0])); 1900 break; 1901 case O_UID: 1902 pwd = getpwuid(insntoc(cmd, u32)->d[0]); 1903 if (pwd != NULL) 1904 bprintf(bp, " uid %s", pwd->pw_name); 1905 else 1906 bprintf(bp, " uid %u", 1907 insntoc(cmd, u32)->d[0]); 1908 break; 1909 case O_GID: 1910 grp = getgrgid(insntoc(cmd, u32)->d[0]); 1911 if (grp != NULL) 1912 bprintf(bp, " gid %s", grp->gr_name); 1913 else 1914 bprintf(bp, " gid %u", 1915 insntoc(cmd, u32)->d[0]); 1916 break; 1917 case O_JAIL: 1918 bprintf(bp, " jail %d", insntoc(cmd, u32)->d[0]); 1919 break; 1920 case O_VERREVPATH: 1921 bprintf(bp, " verrevpath"); 1922 break; 1923 case O_VERSRCREACH: 1924 bprintf(bp, " versrcreach"); 1925 break; 1926 case O_ANTISPOOF: 1927 bprintf(bp, " antispoof"); 1928 break; 1929 case O_IPSEC: 1930 bprintf(bp, " ipsec"); 1931 break; 1932 case O_NOP: 1933 bprintf(bp, " // %s", (const char *)(cmd + 1)); 1934 break; 1935 case O_KEEP_STATE: 1936 if (state->flags & HAVE_PROBE_STATE) 1937 bprintf(bp, " keep-state"); 1938 else 1939 bprintf(bp, " record-state"); 1940 bprintf(bp, " :%s", 1941 object_search_ctlv(fo->tstate, 1942 insntoc(cmd, kidx)->kidx, 1943 IPFW_TLV_STATE_NAME)); 1944 break; 1945 case O_LIMIT: 1946 if (state->flags & HAVE_PROBE_STATE) 1947 bprintf(bp, " limit"); 1948 else 1949 bprintf(bp, " set-limit"); 1950 print_limit_mask(bp, insntoc(cmd, limit)); 1951 bprintf(bp, " :%s", 1952 object_search_ctlv(fo->tstate, 1953 insntoc(cmd, kidx)->kidx, 1954 IPFW_TLV_STATE_NAME)); 1955 break; 1956 case O_IP6: 1957 if (state->flags & HAVE_PROTO) 1958 bprintf(bp, " proto"); 1959 bprintf(bp, " ip6"); 1960 break; 1961 case O_IP4: 1962 if (state->flags & HAVE_PROTO) 1963 bprintf(bp, " proto"); 1964 bprintf(bp, " ip4"); 1965 break; 1966 case O_ICMP6TYPE: 1967 print_icmp6types(bp, insntoc(cmd, u32)); 1968 break; 1969 case O_EXT_HDR: 1970 print_ext6hdr(bp, cmd); 1971 break; 1972 case O_TAGGED: 1973 if (F_LEN(cmd) == 1) 1974 bprint_uint_arg(bp, " tagged ", cmd->arg1); 1975 else 1976 print_newports(bp, insntoc(cmd, u16), 1977 0, O_TAGGED); 1978 break; 1979 case O_SKIP_ACTION: 1980 bprintf(bp, " defer-immediate-action"); 1981 break; 1982 case O_MARK: 1983 bprintf(bp, " mark"); 1984 if (cmd->arg1 == IP_FW_TARG) 1985 bprintf(bp, " tablearg"); 1986 else 1987 bprintf(bp, " %#x", insntoc(cmd, u32)->d[0]); 1988 1989 if (insntoc(cmd, u32)->d[1] != 0xFFFFFFFF) 1990 bprintf(bp, ":%#x", insntoc(cmd, u32)->d[1]); 1991 break; 1992 1993 default: 1994 bprintf(bp, " [opcode %d len %d]", cmd->opcode, 1995 cmd->len); 1996 } 1997 if (cmd->len & F_OR) { 1998 bprintf(bp, " or"); 1999 state->or_block = 1; 2000 } else if (state->or_block != 0) { 2001 bprintf(bp, " }"); 2002 state->or_block = 0; 2003 } 2004 mark_printed(state, cmd); 2005 2006 return (1); 2007 } 2008 2009 static ipfw_insn * 2010 print_opcode(struct buf_pr *bp, struct format_opts *fo, 2011 struct show_state *state, int opcode) 2012 { 2013 ipfw_insn *cmd; 2014 int l; 2015 2016 for (l = state->rule->act_ofs, cmd = state->rule->cmd; 2017 l > 0; l -= F_LEN(cmd), cmd += F_LEN(cmd)) { 2018 /* We use zero opcode to print the rest of options */ 2019 if (opcode >= 0 && cmd->opcode != opcode) 2020 continue; 2021 /* 2022 * Skip O_NOP, when we printing the rest 2023 * of options, it will be handled separately. 2024 */ 2025 if (cmd->opcode == O_NOP && opcode != O_NOP) 2026 continue; 2027 if (!print_instruction(bp, fo, state, cmd)) 2028 continue; 2029 return (cmd); 2030 } 2031 return (NULL); 2032 } 2033 2034 static void 2035 print_fwd(struct buf_pr *bp, const ipfw_insn *cmd) 2036 { 2037 char buf[INET6_ADDRSTRLEN + IF_NAMESIZE + 2]; 2038 const ipfw_insn_sa6 *sa6; 2039 const ipfw_insn_sa *sa; 2040 uint16_t port; 2041 2042 if (cmd->opcode == O_FORWARD_IP) { 2043 sa = insntoc(cmd, sa); 2044 port = sa->sa.sin_port; 2045 if (sa->sa.sin_addr.s_addr == INADDR_ANY) 2046 bprintf(bp, "fwd tablearg"); 2047 else 2048 bprintf(bp, "fwd %s", inet_ntoa(sa->sa.sin_addr)); 2049 } else { 2050 sa6 = insntoc(cmd, sa6); 2051 port = sa6->sa.sin6_port; 2052 bprintf(bp, "fwd "); 2053 if (getnameinfo((const struct sockaddr *)&sa6->sa, 2054 sizeof(struct sockaddr_in6), buf, sizeof(buf), NULL, 0, 2055 NI_NUMERICHOST) == 0) 2056 bprintf(bp, "%s", buf); 2057 } 2058 if (port != 0) 2059 bprintf(bp, ",%u", port); 2060 } 2061 2062 static void 2063 print_logdst(struct buf_pr *bp, uint16_t arg1) 2064 { 2065 char const *comma = ""; 2066 2067 bprintf(bp, " logdst "); 2068 if (arg1 & IPFW_LOG_SYSLOG) { 2069 bprintf(bp, "%ssyslog", comma); 2070 comma = ","; 2071 } 2072 if (arg1 & IPFW_LOG_IPFW0) { 2073 bprintf(bp, "%sbpf", comma); 2074 comma = ","; 2075 } 2076 if (arg1 & IPFW_LOG_RTSOCK) { 2077 bprintf(bp, "%srtsock", comma); 2078 comma = ","; 2079 } 2080 } 2081 2082 static int 2083 print_action_instruction(struct buf_pr *bp, const struct format_opts *fo, 2084 struct show_state *state, const ipfw_insn *cmd) 2085 { 2086 const char *s; 2087 2088 if (is_printed_opcode(state, cmd)) 2089 return (0); 2090 switch (cmd->opcode) { 2091 case O_CHECK_STATE: 2092 bprintf(bp, "check-state"); 2093 if (insntoc(cmd, kidx)->kidx != 0) 2094 s = object_search_ctlv(fo->tstate, 2095 insntoc(cmd, kidx)->kidx, 2096 IPFW_TLV_STATE_NAME); 2097 else 2098 s = NULL; 2099 bprintf(bp, " :%s", s ? s: "any"); 2100 break; 2101 case O_ACCEPT: 2102 bprintf(bp, "allow"); 2103 break; 2104 case O_COUNT: 2105 bprintf(bp, "count"); 2106 break; 2107 case O_DENY: 2108 bprintf(bp, "deny"); 2109 break; 2110 case O_REJECT: 2111 if (cmd->arg1 == ICMP_REJECT_RST) 2112 bprintf(bp, "reset"); 2113 else if (cmd->arg1 == ICMP_REJECT_ABORT) 2114 bprintf(bp, "abort"); 2115 else if (cmd->arg1 == ICMP_UNREACH_HOST) 2116 bprintf(bp, "reject"); 2117 else if (cmd->arg1 == ICMP_UNREACH_NEEDFRAG && 2118 cmd->len == F_INSN_SIZE(ipfw_insn_u16)) 2119 bprintf(bp, "needfrag %u", 2120 insntoc(cmd, u16)->ports[0]); 2121 else 2122 print_reject_code(bp, cmd->arg1); 2123 break; 2124 case O_UNREACH6: 2125 if (cmd->arg1 == ICMP6_UNREACH_RST) 2126 bprintf(bp, "reset6"); 2127 else if (cmd->arg1 == ICMP6_UNREACH_ABORT) 2128 bprintf(bp, "abort6"); 2129 else 2130 print_unreach6_code(bp, cmd->arg1); 2131 break; 2132 case O_SKIPTO: 2133 bprint_uint_arg(bp, "skipto ", insntoc(cmd, u32)->d[0]); 2134 break; 2135 case O_PIPE: 2136 bprint_uint_arg(bp, "pipe ", cmd->arg1); 2137 break; 2138 case O_QUEUE: 2139 bprint_uint_arg(bp, "queue ", cmd->arg1); 2140 break; 2141 case O_DIVERT: 2142 bprint_uint_arg(bp, "divert ", cmd->arg1); 2143 break; 2144 case O_TEE: 2145 bprint_uint_arg(bp, "tee ", cmd->arg1); 2146 break; 2147 case O_NETGRAPH: 2148 bprint_uint_arg(bp, "netgraph ", cmd->arg1); 2149 break; 2150 case O_NGTEE: 2151 bprint_uint_arg(bp, "ngtee ", cmd->arg1); 2152 break; 2153 case O_FORWARD_IP: 2154 case O_FORWARD_IP6: 2155 print_fwd(bp, cmd); 2156 break; 2157 case O_LOG: 2158 bprintf(bp, " log"); 2159 if (insntoc(cmd, log)->max_log > 0) 2160 bprintf(bp, " logamount %d", 2161 insntoc(cmd, log)->max_log); 2162 if (cmd->arg1 != IPFW_LOG_DEFAULT) 2163 print_logdst(bp, cmd->arg1); 2164 break; 2165 case O_ALTQ: 2166 #ifndef NO_ALTQ 2167 print_altq_cmd(bp, insntoc(cmd, altq)); 2168 #endif 2169 break; 2170 case O_TAG: 2171 bprint_uint_arg(bp, cmd->len & F_NOT ? " untag ": 2172 " tag ", cmd->arg1); 2173 break; 2174 case O_NAT: 2175 if (cmd->arg1 != IP_FW_NAT44_GLOBAL) 2176 bprint_uint_arg(bp, "nat ", cmd->arg1); 2177 else 2178 bprintf(bp, "nat global"); 2179 break; 2180 case O_SETFIB: 2181 if (cmd->arg1 == IP_FW_TARG) 2182 bprint_uint_arg(bp, "setfib ", cmd->arg1); 2183 else 2184 bprintf(bp, "setfib %u", cmd->arg1 & 0x7FFF); 2185 break; 2186 case O_EXTERNAL_ACTION: 2187 /* 2188 * The external action can consists of two following 2189 * each other opcodes - O_EXTERNAL_ACTION and 2190 * O_EXTERNAL_INSTANCE. The first contains the ID of 2191 * name of external action. The second contains the ID 2192 * of name of external action instance. 2193 * NOTE: in case when external action has no named 2194 * instances support, the second opcode isn't needed. 2195 */ 2196 state->eaction = insntoc(cmd, kidx); 2197 s = object_search_ctlv(fo->tstate, 2198 state->eaction->kidx, 2199 IPFW_TLV_EACTION); 2200 if (match_token(rule_eactions, s) != -1) 2201 bprintf(bp, "%s", s); 2202 else 2203 bprintf(bp, "eaction %s", s); 2204 break; 2205 case O_EXTERNAL_INSTANCE: 2206 if (state->eaction == NULL) 2207 break; 2208 /* 2209 * XXX: we need to teach ipfw(9) to rewrite opcodes 2210 * in the user buffer on rule addition. When we add 2211 * the rule, we specify zero TLV type for 2212 * O_EXTERNAL_INSTANCE object. To show correct 2213 * rule after `ipfw add` we need to search instance 2214 * name with zero type. But when we do `ipfw show` 2215 * we calculate TLV type using IPFW_TLV_EACTION_NAME() 2216 * macro. 2217 */ 2218 s = object_search_ctlv(fo->tstate, 2219 insntoc(cmd, kidx)->kidx, 0); 2220 if (s == NULL) 2221 s = object_search_ctlv(fo->tstate, 2222 insntoc(cmd, kidx)->kidx, IPFW_TLV_EACTION_NAME( 2223 state->eaction->kidx)); 2224 bprintf(bp, " %s", s); 2225 break; 2226 case O_EXTERNAL_DATA: 2227 if (state->eaction == NULL) 2228 break; 2229 /* 2230 * Currently we support data formatting only for 2231 * external data with datalen u16. For unknown data 2232 * print its size in bytes. 2233 */ 2234 if (cmd->len == F_INSN_SIZE(ipfw_insn)) 2235 bprintf(bp, " %u", cmd->arg1); 2236 else 2237 bprintf(bp, " %ubytes", 2238 (unsigned)(cmd->len * sizeof(uint32_t))); 2239 break; 2240 case O_SETDSCP: 2241 if (cmd->arg1 == IP_FW_TARG) { 2242 bprintf(bp, "setdscp tablearg"); 2243 break; 2244 } 2245 s = match_value(f_ipdscp, cmd->arg1 & 0x3F); 2246 if (s != NULL) 2247 bprintf(bp, "setdscp %s", s); 2248 else 2249 bprintf(bp, "setdscp %u", cmd->arg1 & 0x3F); 2250 break; 2251 case O_REASS: 2252 bprintf(bp, "reass"); 2253 break; 2254 case O_CALLRETURN: 2255 if (cmd->len & F_NOT) { 2256 s = match_value(return_types, cmd->arg1); 2257 bprintf(bp, "return %s", s ? s: "<invalid>"); 2258 } else 2259 bprint_uint_arg(bp, "call ", insntoc(cmd, u32)->d[0]); 2260 break; 2261 case O_SETMARK: 2262 if (cmd->arg1 == IP_FW_TARG) { 2263 bprintf(bp, "setmark tablearg"); 2264 break; 2265 } 2266 bprintf(bp, "setmark %#x", insntoc(cmd, u32)->d[0]); 2267 break; 2268 default: 2269 bprintf(bp, "** unrecognized action %d len %d ", 2270 cmd->opcode, cmd->len); 2271 } 2272 mark_printed(state, cmd); 2273 2274 return (1); 2275 } 2276 2277 2278 static ipfw_insn * 2279 print_action(struct buf_pr *bp, struct format_opts *fo, 2280 struct show_state *state, uint8_t opcode) 2281 { 2282 ipfw_insn *cmd; 2283 int l; 2284 2285 for (l = state->rule->cmd_len - state->rule->act_ofs, 2286 cmd = ACTION_PTR(state->rule); l > 0; 2287 l -= F_LEN(cmd), cmd += F_LEN(cmd)) { 2288 if (cmd->opcode != opcode) 2289 continue; 2290 if (!print_action_instruction(bp, fo, state, cmd)) 2291 continue; 2292 return (cmd); 2293 } 2294 return (NULL); 2295 } 2296 2297 static void 2298 print_proto(struct buf_pr *bp, struct format_opts *fo, 2299 struct show_state *state) 2300 { 2301 ipfw_insn *cmd; 2302 int l, proto, ip4, ip6; 2303 2304 /* Count all O_PROTO, O_IP4, O_IP6 instructions. */ 2305 proto = ip4 = ip6 = 0; 2306 for (l = state->rule->act_ofs, cmd = state->rule->cmd; 2307 l > 0; l -= F_LEN(cmd), cmd += F_LEN(cmd)) { 2308 switch (cmd->opcode) { 2309 case O_PROTO: 2310 proto++; 2311 break; 2312 case O_IP4: 2313 ip4 = 1; 2314 if (cmd->len & F_OR) 2315 ip4++; 2316 break; 2317 case O_IP6: 2318 ip6 = 1; 2319 if (cmd->len & F_OR) 2320 ip6++; 2321 break; 2322 default: 2323 continue; 2324 } 2325 } 2326 if (proto == 0 && ip4 == 0 && ip6 == 0) { 2327 state->proto = IPPROTO_IP; 2328 state->flags |= HAVE_PROTO; 2329 bprintf(bp, " ip"); 2330 return; 2331 } 2332 /* To handle the case { ip4 or ip6 }, print opcode with F_OR first */ 2333 cmd = NULL; 2334 if (ip4 || ip6) 2335 cmd = print_opcode(bp, fo, state, ip4 > ip6 ? O_IP4: O_IP6); 2336 if (cmd != NULL && (cmd->len & F_OR)) 2337 cmd = print_opcode(bp, fo, state, ip4 > ip6 ? O_IP6: O_IP4); 2338 if (cmd == NULL || (cmd->len & F_OR)) 2339 for (l = proto; l > 0; l--) { 2340 cmd = print_opcode(bp, fo, state, O_PROTO); 2341 if (cmd == NULL || (cmd->len & F_OR) == 0) 2342 break; 2343 } 2344 /* Initialize proto, it is used by print_newports() */ 2345 state->flags |= HAVE_PROTO; 2346 if (state->proto == 0 && ip6 != 0) 2347 state->proto = IPPROTO_IPV6; 2348 } 2349 2350 static int 2351 match_opcode(int opcode, const int opcodes[], size_t nops) 2352 { 2353 size_t i; 2354 2355 for (i = 0; i < nops; i++) 2356 if (opcode == opcodes[i]) 2357 return (1); 2358 return (0); 2359 } 2360 2361 static void 2362 print_address(struct buf_pr *bp, struct format_opts *fo, 2363 struct show_state *state, const int opcodes[], size_t nops, int portop, 2364 int flag) 2365 { 2366 ipfw_insn *cmd; 2367 int count, l, portcnt, pf; 2368 2369 count = portcnt = 0; 2370 for (l = state->rule->act_ofs, cmd = state->rule->cmd; 2371 l > 0; l -= F_LEN(cmd), cmd += F_LEN(cmd)) { 2372 if (match_opcode(cmd->opcode, opcodes, nops)) { 2373 /* 2374 * Special handling for O_IP_DST_LOOKUP when 2375 * lookup type is not LOOKUP_NONE. 2376 */ 2377 if (cmd->opcode == O_IP_DST_LOOKUP && 2378 IPFW_LOOKUP_TYPE(cmd) != LOOKUP_NONE) 2379 continue; 2380 count++; 2381 } else if (cmd->opcode == portop) 2382 portcnt++; 2383 } 2384 if (count == 0) 2385 bprintf(bp, " any"); 2386 for (l = state->rule->act_ofs, cmd = state->rule->cmd; 2387 l > 0 && count > 0; l -= F_LEN(cmd), cmd += F_LEN(cmd)) { 2388 if (!match_opcode(cmd->opcode, opcodes, nops)) 2389 continue; 2390 print_instruction(bp, fo, state, cmd); 2391 if ((cmd->len & F_OR) == 0) 2392 break; 2393 count--; 2394 } 2395 /* 2396 * If several O_IP_?PORT opcodes specified, leave them to the 2397 * options section. 2398 */ 2399 if (portcnt == 1) { 2400 for (l = state->rule->act_ofs, cmd = state->rule->cmd, pf = 0; 2401 l > 0; l -= F_LEN(cmd), cmd += F_LEN(cmd)) { 2402 if (cmd->opcode != portop) { 2403 pf = (cmd->len & F_OR); 2404 continue; 2405 } 2406 /* Print opcode iff it is not in OR block. */ 2407 if (pf == 0 && (cmd->len & F_OR) == 0) 2408 print_instruction(bp, fo, state, cmd); 2409 break; 2410 } 2411 } 2412 state->flags |= flag; 2413 } 2414 2415 static const int action_opcodes[] = { 2416 O_CHECK_STATE, O_ACCEPT, O_COUNT, O_DENY, O_REJECT, 2417 O_UNREACH6, O_SKIPTO, O_PIPE, O_QUEUE, O_DIVERT, O_TEE, 2418 O_NETGRAPH, O_NGTEE, O_FORWARD_IP, O_FORWARD_IP6, O_NAT, 2419 O_SETFIB, O_SETDSCP, O_REASS, O_CALLRETURN, O_SETMARK, 2420 /* keep the following opcodes at the end of the list */ 2421 O_EXTERNAL_ACTION, O_EXTERNAL_INSTANCE, O_EXTERNAL_DATA 2422 }; 2423 2424 static const int modifier_opcodes[] = { 2425 O_LOG, O_ALTQ, O_TAG 2426 }; 2427 2428 static const int src_opcodes[] = { 2429 O_IP_SRC, O_IP_SRC_LOOKUP, O_IP_SRC_MASK, O_IP_SRC_ME, 2430 O_IP_SRC_SET, O_IP6_SRC, O_IP6_SRC_MASK, O_IP6_SRC_ME 2431 }; 2432 2433 static const int dst_opcodes[] = { 2434 O_IP_DST, O_IP_DST_LOOKUP, O_IP_DST_MASK, O_IP_DST_ME, 2435 O_IP_DST_SET, O_IP6_DST, O_IP6_DST_MASK, O_IP6_DST_ME 2436 }; 2437 2438 #if IPFW_DEFAULT_RULE > 65535 2439 #define RULENUM_FORMAT "%06d" 2440 #else 2441 #define RULENUM_FORMAT "%05d" 2442 #endif 2443 2444 static void 2445 show_static_rule(struct cmdline_opts *co, struct format_opts *fo, 2446 struct buf_pr *bp, struct ip_fw_rule *rule, struct ip_fw_bcounter *cntr) 2447 { 2448 static int twidth = 0; 2449 struct show_state state; 2450 ipfw_insn *cmd; 2451 size_t i; 2452 2453 /* Print # DISABLED or skip the rule */ 2454 if ((fo->set_mask & (1 << rule->set)) == 0) { 2455 /* disabled mask */ 2456 if (!co->show_sets) 2457 return; 2458 else 2459 bprintf(bp, "# DISABLED "); 2460 } 2461 if (init_show_state(&state, rule) != 0) { 2462 warn("init_show_state() failed"); 2463 return; 2464 } 2465 2466 bprintf(bp, RULENUM_FORMAT " ", rule->rulenum); 2467 2468 /* only if counters are available */ 2469 if (cntr != NULL) { 2470 /* Print counters if enabled */ 2471 if (fo->pcwidth > 0 || fo->bcwidth > 0) { 2472 pr_u64(bp, &cntr->pcnt, fo->pcwidth); 2473 pr_u64(bp, &cntr->bcnt, fo->bcwidth); 2474 } 2475 2476 /* Print timestamp */ 2477 if (co->do_time == TIMESTAMP_NUMERIC) 2478 bprintf(bp, "%10u ", cntr->timestamp); 2479 else if (co->do_time == TIMESTAMP_STRING) { 2480 char timestr[30]; 2481 time_t t = (time_t)0; 2482 2483 if (twidth == 0) { 2484 strcpy(timestr, ctime(&t)); 2485 *strchr(timestr, '\n') = '\0'; 2486 twidth = strlen(timestr); 2487 } 2488 if (cntr->timestamp > 0) { 2489 t = _long_to_time(cntr->timestamp); 2490 2491 strcpy(timestr, ctime(&t)); 2492 *strchr(timestr, '\n') = '\0'; 2493 bprintf(bp, "%s ", timestr); 2494 } else { 2495 bprintf(bp, "%*s ", twidth, ""); 2496 } 2497 } 2498 } 2499 2500 /* Print set number */ 2501 if (co->show_sets) 2502 bprintf(bp, "set %d ", rule->set); 2503 2504 /* Print the optional "match probability" */ 2505 cmd = print_opcode(bp, fo, &state, O_PROB); 2506 /* Print rule action */ 2507 for (i = 0; i < nitems(action_opcodes); i++) { 2508 cmd = print_action(bp, fo, &state, action_opcodes[i]); 2509 if (cmd == NULL) 2510 continue; 2511 /* Handle special cases */ 2512 switch (cmd->opcode) { 2513 case O_CHECK_STATE: 2514 goto end; 2515 case O_EXTERNAL_ACTION: 2516 case O_EXTERNAL_INSTANCE: 2517 /* External action can have several instructions */ 2518 continue; 2519 } 2520 break; 2521 } 2522 /* Print rule modifiers */ 2523 for (i = 0; i < nitems(modifier_opcodes); i++) 2524 print_action(bp, fo, &state, modifier_opcodes[i]); 2525 /* 2526 * Print rule body 2527 */ 2528 if (co->comment_only != 0) 2529 goto end; 2530 2531 if (rule->flags & IPFW_RULE_JUSTOPTS) { 2532 state.flags |= HAVE_PROTO | HAVE_SRCIP | HAVE_DSTIP; 2533 /* 2534 * Print `proto ip` if all opcodes has been already printed. 2535 */ 2536 if (memchr(state.printed, 0, rule->act_ofs) == NULL) { 2537 bprintf(bp, " proto ip"); 2538 goto end; 2539 } 2540 goto justopts; 2541 } 2542 2543 print_proto(bp, fo, &state); 2544 if (co->do_compact != 0 && (rule->flags & IPFW_RULE_NOOPT)) 2545 goto justopts; 2546 2547 /* Print source */ 2548 bprintf(bp, " from"); 2549 print_address(bp, fo, &state, src_opcodes, nitems(src_opcodes), 2550 O_IP_SRCPORT, HAVE_SRCIP); 2551 2552 /* Print destination */ 2553 bprintf(bp, " to"); 2554 print_address(bp, fo, &state, dst_opcodes, nitems(dst_opcodes), 2555 O_IP_DSTPORT, HAVE_DSTIP); 2556 2557 justopts: 2558 /* Print the rest of options */ 2559 while (print_opcode(bp, fo, &state, -1)) 2560 ; 2561 end: 2562 /* Print comment at the end */ 2563 cmd = print_opcode(bp, fo, &state, O_NOP); 2564 if (co->comment_only != 0 && cmd == NULL) 2565 bprintf(bp, " // ..."); 2566 bprintf(bp, "\n"); 2567 free_show_state(&state); 2568 } 2569 2570 static void 2571 show_dyn_state(struct cmdline_opts *co, struct format_opts *fo, 2572 struct buf_pr *bp, ipfw_dyn_rule *d) 2573 { 2574 struct protoent *pe; 2575 struct in_addr a; 2576 char buf[INET6_ADDRSTRLEN]; 2577 2578 if (!d->expire && !(d->type == O_LIMIT_PARENT)) 2579 return; 2580 2581 bprintf(bp, RULENUM_FORMAT, d->rulenum); 2582 if (fo->pcwidth > 0 || fo->bcwidth > 0) { 2583 bprintf(bp, " "); 2584 pr_u64(bp, &d->pcnt, fo->pcwidth); 2585 pr_u64(bp, &d->bcnt, fo->bcwidth); 2586 bprintf(bp, "(%ds)", d->expire); 2587 } 2588 switch (d->type) { 2589 case O_LIMIT_PARENT: 2590 bprintf(bp, " PARENT %u", d->count); 2591 break; 2592 case O_LIMIT: 2593 bprintf(bp, " LIMIT"); 2594 break; 2595 case O_KEEP_STATE: /* bidir, no mask */ 2596 bprintf(bp, " STATE"); 2597 break; 2598 } 2599 2600 if ((pe = getprotobynumber(d->id.proto)) != NULL) 2601 bprintf(bp, " %s", pe->p_name); 2602 else 2603 bprintf(bp, " proto %u", d->id.proto); 2604 2605 if (d->id.addr_type == 4) { 2606 a.s_addr = htonl(d->id.src_ip); 2607 bprintf(bp, " %s %d", inet_ntoa(a), d->id.src_port); 2608 2609 a.s_addr = htonl(d->id.dst_ip); 2610 bprintf(bp, " <-> %s %d", inet_ntoa(a), d->id.dst_port); 2611 } else if (d->id.addr_type == 6) { 2612 bprintf(bp, " %s %d", inet_ntop(AF_INET6, &d->id.src_ip6, buf, 2613 sizeof(buf)), d->id.src_port); 2614 bprintf(bp, " <-> %s %d", inet_ntop(AF_INET6, &d->id.dst_ip6, 2615 buf, sizeof(buf)), d->id.dst_port); 2616 } else 2617 bprintf(bp, " UNKNOWN <-> UNKNOWN"); 2618 if (d->kidx != 0) 2619 bprintf(bp, " :%s", object_search_ctlv(fo->tstate, 2620 d->kidx, IPFW_TLV_STATE_NAME)); 2621 2622 #define BOTH_SYN (TH_SYN | (TH_SYN << 8)) 2623 #define BOTH_FIN (TH_FIN | (TH_FIN << 8)) 2624 if (co->verbose) { 2625 bprintf(bp, " state 0x%08x%s", d->state, 2626 d->state ? " ": ","); 2627 if (d->state & IPFW_DYN_ORPHANED) 2628 bprintf(bp, "ORPHANED,"); 2629 if ((d->state & BOTH_SYN) == BOTH_SYN) 2630 bprintf(bp, "BOTH_SYN,"); 2631 else { 2632 if (d->state & TH_SYN) 2633 bprintf(bp, "F_SYN,"); 2634 if (d->state & (TH_SYN << 8)) 2635 bprintf(bp, "R_SYN,"); 2636 } 2637 if ((d->state & BOTH_FIN) == BOTH_FIN) 2638 bprintf(bp, "BOTH_FIN,"); 2639 else { 2640 if (d->state & TH_FIN) 2641 bprintf(bp, "F_FIN,"); 2642 if (d->state & (TH_FIN << 8)) 2643 bprintf(bp, "R_FIN,"); 2644 } 2645 bprintf(bp, " f_ack 0x%x, r_ack 0x%x", d->ack_fwd, 2646 d->ack_rev); 2647 } 2648 } 2649 2650 static int 2651 do_range_cmd(int cmd, ipfw_range_tlv *rt) 2652 { 2653 ipfw_range_header rh; 2654 size_t sz; 2655 2656 memset(&rh, 0, sizeof(rh)); 2657 memcpy(&rh.range, rt, sizeof(*rt)); 2658 rh.range.head.length = sizeof(*rt); 2659 rh.range.head.type = IPFW_TLV_RANGE; 2660 sz = sizeof(rh); 2661 2662 if (do_get3(cmd, &rh.opheader, &sz) != 0) 2663 return (-1); 2664 /* Save number of matched objects */ 2665 rt->new_set = rh.range.new_set; 2666 return (0); 2667 } 2668 2669 /* 2670 * This one handles all set-related commands 2671 * ipfw set { show | enable | disable } 2672 * ipfw set swap X Y 2673 * ipfw set move X to Y 2674 * ipfw set move rule X to Y 2675 */ 2676 void 2677 ipfw_sets_handler(char *av[]) 2678 { 2679 ipfw_range_tlv rt; 2680 const char *msg; 2681 size_t size; 2682 uint32_t masks[2], rulenum; 2683 int i; 2684 uint8_t cmd; 2685 2686 av++; 2687 memset(&rt, 0, sizeof(rt)); 2688 2689 if (av[0] == NULL) 2690 errx(EX_USAGE, "set needs command"); 2691 if (_substrcmp(*av, "show") == 0) { 2692 struct format_opts fo; 2693 ipfw_cfg_lheader *cfg; 2694 2695 memset(&fo, 0, sizeof(fo)); 2696 if (ipfw_get_config(&g_co, &fo, &cfg, &size) != 0) 2697 err(EX_OSERR, "requesting config failed"); 2698 2699 for (i = 0, msg = "disable"; i < RESVD_SET; i++) 2700 if ((cfg->set_mask & (1<<i)) == 0) { 2701 printf("%s %d", msg, i); 2702 msg = ""; 2703 } 2704 msg = (cfg->set_mask != (uint32_t)-1) ? " enable" : "enable"; 2705 for (i = 0; i < RESVD_SET; i++) 2706 if ((cfg->set_mask & (1<<i)) != 0) { 2707 printf("%s %d", msg, i); 2708 msg = ""; 2709 } 2710 printf("\n"); 2711 free(cfg); 2712 } else if (_substrcmp(*av, "swap") == 0) { 2713 av++; 2714 if ( av[0] == NULL || av[1] == NULL ) 2715 errx(EX_USAGE, "set swap needs 2 set numbers\n"); 2716 rt.set = atoi(av[0]); 2717 rt.new_set = atoi(av[1]); 2718 if (!isdigit(*(av[0])) || rt.set > RESVD_SET) 2719 errx(EX_DATAERR, "invalid set number %s\n", av[0]); 2720 if (!isdigit(*(av[1])) || rt.new_set > RESVD_SET) 2721 errx(EX_DATAERR, "invalid set number %s\n", av[1]); 2722 i = do_range_cmd(IP_FW_SET_SWAP, &rt); 2723 } else if (_substrcmp(*av, "move") == 0) { 2724 av++; 2725 if (av[0] && _substrcmp(*av, "rule") == 0) { 2726 rt.flags = IPFW_RCFLAG_RANGE; /* move rules to new set */ 2727 cmd = IP_FW_XMOVE; 2728 av++; 2729 } else 2730 cmd = IP_FW_SET_MOVE; /* Move set to new one */ 2731 if (av[0] == NULL || av[1] == NULL || av[2] == NULL || 2732 av[3] != NULL || _substrcmp(av[1], "to") != 0) 2733 errx(EX_USAGE, "syntax: set move [rule] X to Y\n"); 2734 rulenum = (uint32_t)strtoul(av[0], NULL, 10); 2735 rt.new_set = atoi(av[2]); 2736 if (cmd == IP_FW_XMOVE) { 2737 rt.start_rule = rulenum; 2738 rt.end_rule = rulenum; 2739 } else 2740 rt.set = rulenum; 2741 rt.new_set = atoi(av[2]); 2742 if (!isdigit(*(av[0])) || (cmd == 3 && rt.set > RESVD_SET) || 2743 (cmd == 2 && rt.start_rule == IPFW_DEFAULT_RULE) ) 2744 errx(EX_DATAERR, "invalid source number %s\n", av[0]); 2745 if (!isdigit(*(av[2])) || rt.new_set > RESVD_SET) 2746 errx(EX_DATAERR, "invalid dest. set %s\n", av[1]); 2747 i = do_range_cmd(cmd, &rt); 2748 if (i < 0) 2749 err(EX_OSERR, "failed to move %s", 2750 cmd == IP_FW_SET_MOVE ? "set": "rule"); 2751 } else if (_substrcmp(*av, "disable") == 0 || 2752 _substrcmp(*av, "enable") == 0 ) { 2753 int which = _substrcmp(*av, "enable") == 0 ? 1 : 0; 2754 2755 av++; 2756 masks[0] = masks[1] = 0; 2757 2758 while (av[0]) { 2759 if (isdigit(**av)) { 2760 i = atoi(*av); 2761 if (i < 0 || i > RESVD_SET) 2762 errx(EX_DATAERR, 2763 "invalid set number %d\n", i); 2764 masks[which] |= (1<<i); 2765 } else if (_substrcmp(*av, "disable") == 0) 2766 which = 0; 2767 else if (_substrcmp(*av, "enable") == 0) 2768 which = 1; 2769 else 2770 errx(EX_DATAERR, 2771 "invalid set command %s\n", *av); 2772 av++; 2773 } 2774 if ( (masks[0] & masks[1]) != 0 ) 2775 errx(EX_DATAERR, 2776 "cannot enable and disable the same set\n"); 2777 2778 rt.set = masks[0]; 2779 rt.new_set = masks[1]; 2780 i = do_range_cmd(IP_FW_SET_ENABLE, &rt); 2781 if (i) 2782 warn("set enable/disable: setsockopt(IP_FW_SET_ENABLE)"); 2783 } else 2784 errx(EX_USAGE, "invalid set command %s\n", *av); 2785 } 2786 2787 static void 2788 manage_skipto_cache(int op) 2789 { 2790 ipfw_cmd_header req; 2791 2792 memset(&req, 0, sizeof(req)); 2793 req.size = sizeof(req); 2794 req.cmd = op ? SKIPTO_CACHE_ENABLE : SKIPTO_CACHE_DISABLE; 2795 2796 do_set3(IP_FW_SKIPTO_CACHE, &req.opheader, sizeof(req)); 2797 } 2798 2799 void 2800 ipfw_sysctl_handler(char *av[], int which) 2801 { 2802 av++; 2803 2804 if (av[0] == NULL) { 2805 warnx("missing keyword to enable/disable\n"); 2806 } else if (_substrcmp(*av, "firewall") == 0) { 2807 sysctlbyname("net.inet.ip.fw.enable", NULL, 0, 2808 &which, sizeof(which)); 2809 sysctlbyname("net.inet6.ip6.fw.enable", NULL, 0, 2810 &which, sizeof(which)); 2811 } else if (_substrcmp(*av, "one_pass") == 0) { 2812 sysctlbyname("net.inet.ip.fw.one_pass", NULL, 0, 2813 &which, sizeof(which)); 2814 } else if (_substrcmp(*av, "debug") == 0) { 2815 sysctlbyname("net.inet.ip.fw.debug", NULL, 0, 2816 &which, sizeof(which)); 2817 } else if (_substrcmp(*av, "verbose") == 0) { 2818 sysctlbyname("net.inet.ip.fw.verbose", NULL, 0, 2819 &which, sizeof(which)); 2820 } else if (_substrcmp(*av, "dyn_keepalive") == 0) { 2821 sysctlbyname("net.inet.ip.fw.dyn_keepalive", NULL, 0, 2822 &which, sizeof(which)); 2823 } else if (_substrcmp(*av, "skipto_cache") == 0) { 2824 manage_skipto_cache(which); 2825 #ifndef NO_ALTQ 2826 } else if (_substrcmp(*av, "altq") == 0) { 2827 altq_set_enabled(which); 2828 #endif 2829 } else { 2830 warnx("unrecognize enable/disable keyword: %s\n", *av); 2831 } 2832 } 2833 2834 typedef void state_cb(struct cmdline_opts *co, struct format_opts *fo, 2835 void *arg, void *state); 2836 2837 static void 2838 prepare_format_dyn(struct cmdline_opts *co, struct format_opts *fo, 2839 void *arg __unused, void *_state) 2840 { 2841 ipfw_dyn_rule *d; 2842 int width; 2843 2844 d = (ipfw_dyn_rule *)_state; 2845 /* Count _ALL_ states */ 2846 fo->dcnt++; 2847 2848 if (fo->show_counters == 0) 2849 return; 2850 2851 /* skip states from another set */ 2852 if (co->use_set != 0 && d->set != co->use_set - 1) 2853 return; 2854 2855 width = pr_u64(NULL, &d->pcnt, 0); 2856 if (width > fo->pcwidth) 2857 fo->pcwidth = width; 2858 2859 width = pr_u64(NULL, &d->bcnt, 0); 2860 if (width > fo->bcwidth) 2861 fo->bcwidth = width; 2862 } 2863 2864 static int 2865 foreach_state(struct cmdline_opts *co, struct format_opts *fo, 2866 caddr_t base, size_t sz, state_cb dyn_bc, void *dyn_arg) 2867 { 2868 int ttype; 2869 state_cb *fptr; 2870 void *farg; 2871 ipfw_obj_tlv *tlv; 2872 ipfw_obj_ctlv *ctlv; 2873 2874 fptr = NULL; 2875 ttype = 0; 2876 2877 while (sz > 0) { 2878 ctlv = (ipfw_obj_ctlv *)base; 2879 switch (ctlv->head.type) { 2880 case IPFW_TLV_DYNSTATE_LIST: 2881 base += sizeof(*ctlv); 2882 sz -= sizeof(*ctlv); 2883 ttype = IPFW_TLV_DYN_ENT; 2884 fptr = dyn_bc; 2885 farg = dyn_arg; 2886 break; 2887 default: 2888 return (sz); 2889 } 2890 2891 while (sz > 0) { 2892 tlv = (ipfw_obj_tlv *)base; 2893 if (tlv->type != ttype) 2894 break; 2895 2896 fptr(co, fo, farg, tlv + 1); 2897 sz -= tlv->length; 2898 base += tlv->length; 2899 } 2900 } 2901 2902 return (sz); 2903 } 2904 2905 static void 2906 prepare_format_opts(struct cmdline_opts *co, struct format_opts *fo, 2907 ipfw_obj_tlv *rtlv, int rcnt, caddr_t dynbase, size_t dynsz) 2908 { 2909 int bcwidth, pcwidth, width; 2910 int n; 2911 struct ip_fw_bcounter *cntr; 2912 struct ip_fw_rule *r; 2913 2914 bcwidth = 0; 2915 pcwidth = 0; 2916 if (fo->show_counters != 0) { 2917 for (n = 0; n < rcnt; n++, 2918 rtlv = (ipfw_obj_tlv *)((caddr_t)rtlv + rtlv->length)) { 2919 cntr = (struct ip_fw_bcounter *)(rtlv + 1); 2920 r = (struct ip_fw_rule *)((caddr_t)cntr + cntr->size); 2921 /* skip rules from another set */ 2922 if (co->use_set && r->set != co->use_set - 1) 2923 continue; 2924 2925 /* packet counter */ 2926 width = pr_u64(NULL, &cntr->pcnt, 0); 2927 if (width > pcwidth) 2928 pcwidth = width; 2929 2930 /* byte counter */ 2931 width = pr_u64(NULL, &cntr->bcnt, 0); 2932 if (width > bcwidth) 2933 bcwidth = width; 2934 } 2935 } 2936 fo->bcwidth = bcwidth; 2937 fo->pcwidth = pcwidth; 2938 2939 fo->dcnt = 0; 2940 if (co->do_dynamic && dynsz > 0) 2941 foreach_state(co, fo, dynbase, dynsz, prepare_format_dyn, NULL); 2942 } 2943 2944 static int 2945 list_static_range(struct cmdline_opts *co, struct format_opts *fo, 2946 struct buf_pr *bp, ipfw_obj_tlv *rtlv, int rcnt) 2947 { 2948 int n, seen; 2949 struct ip_fw_rule *r; 2950 struct ip_fw_bcounter *cntr; 2951 2952 for (n = seen = 0; n < rcnt; n++, 2953 rtlv = (ipfw_obj_tlv *)((caddr_t)rtlv + rtlv->length)) { 2954 2955 if ((fo->show_counters | fo->show_time) != 0) { 2956 cntr = (struct ip_fw_bcounter *)(rtlv + 1); 2957 r = (struct ip_fw_rule *)((caddr_t)cntr + cntr->size); 2958 } else { 2959 cntr = NULL; 2960 r = (struct ip_fw_rule *)(rtlv + 1); 2961 } 2962 if (r->rulenum > fo->last) 2963 break; 2964 if (co->use_set && r->set != co->use_set - 1) 2965 continue; 2966 if (r->rulenum >= fo->first && r->rulenum <= fo->last) { 2967 show_static_rule(co, fo, bp, r, cntr); 2968 printf("%s", bp->buf); 2969 bp_flush(bp); 2970 seen++; 2971 } 2972 } 2973 2974 return (seen); 2975 } 2976 2977 static void 2978 list_dyn_state(struct cmdline_opts *co, struct format_opts *fo, 2979 void *_arg, void *_state) 2980 { 2981 ipfw_dyn_rule *d; 2982 struct buf_pr *bp; 2983 2984 d = (ipfw_dyn_rule *)_state; 2985 bp = (struct buf_pr *)_arg; 2986 2987 if (d->rulenum > fo->last) 2988 return; 2989 if (co->use_set != 0 && d->set != co->use_set - 1) 2990 return; 2991 if (d->rulenum >= fo->first) { 2992 show_dyn_state(co, fo, bp, d); 2993 printf("%s\n", bp->buf); 2994 bp_flush(bp); 2995 } 2996 } 2997 2998 static int 2999 list_dyn_range(struct cmdline_opts *co, struct format_opts *fo, 3000 struct buf_pr *bp, caddr_t base, size_t sz) 3001 { 3002 3003 sz = foreach_state(co, fo, base, sz, list_dyn_state, bp); 3004 return (sz); 3005 } 3006 3007 void 3008 ipfw_list(int ac, char *av[], int show_counters) 3009 { 3010 ipfw_cfg_lheader *cfg; 3011 struct format_opts sfo; 3012 size_t sz; 3013 int error; 3014 int lac; 3015 char **lav; 3016 uint32_t rnum; 3017 char *endptr; 3018 3019 if (g_co.test_only) { 3020 fprintf(stderr, "Testing only, list disabled\n"); 3021 return; 3022 } 3023 if (g_co.do_pipe) { 3024 dummynet_list(ac, av, show_counters); 3025 return; 3026 } 3027 3028 ac--; 3029 av++; 3030 memset(&sfo, 0, sizeof(sfo)); 3031 3032 /* Determine rule range to request */ 3033 if (ac > 0) { 3034 for (lac = ac, lav = av; lac != 0; lac--) { 3035 rnum = strtoul(*lav++, &endptr, 10); 3036 if (sfo.first == 0 || rnum < sfo.first) 3037 sfo.first = rnum; 3038 3039 if (*endptr == '-') 3040 rnum = strtoul(endptr + 1, &endptr, 10); 3041 if (sfo.last == 0 || rnum > sfo.last) 3042 sfo.last = rnum; 3043 } 3044 } 3045 3046 /* get configuration from kernel */ 3047 cfg = NULL; 3048 sfo.show_counters = show_counters; 3049 sfo.show_time = g_co.do_time; 3050 if (g_co.do_dynamic != 2) 3051 sfo.flags |= IPFW_CFG_GET_STATIC; 3052 if (g_co.do_dynamic != 0) 3053 sfo.flags |= IPFW_CFG_GET_STATES; 3054 if ((sfo.show_counters | sfo.show_time) != 0) 3055 sfo.flags |= IPFW_CFG_GET_COUNTERS; 3056 if (ipfw_get_config(&g_co, &sfo, &cfg, &sz) != 0) 3057 err(EX_OSERR, "retrieving config failed"); 3058 3059 error = ipfw_show_config(&g_co, &sfo, cfg, sz, ac, av); 3060 3061 free(cfg); 3062 3063 if (error != EX_OK) 3064 exit(error); 3065 } 3066 3067 static int 3068 ipfw_show_config(struct cmdline_opts *co, struct format_opts *fo, 3069 ipfw_cfg_lheader *cfg, size_t sz, int ac, char *av[]) 3070 { 3071 caddr_t dynbase; 3072 size_t dynsz; 3073 int rcnt; 3074 int exitval = EX_OK; 3075 int lac; 3076 char **lav; 3077 char *endptr; 3078 size_t readsz; 3079 struct buf_pr bp; 3080 ipfw_obj_ctlv *ctlv; 3081 ipfw_obj_tlv *rbase; 3082 3083 /* 3084 * Handle tablenames TLV first, if any 3085 */ 3086 rbase = NULL; 3087 dynbase = NULL; 3088 dynsz = 0; 3089 readsz = sizeof(*cfg); 3090 rcnt = 0; 3091 3092 fo->set_mask = cfg->set_mask; 3093 3094 ctlv = (ipfw_obj_ctlv *)(cfg + 1); 3095 if (ctlv->head.type == IPFW_TLV_TBLNAME_LIST) { 3096 object_sort_ctlv(ctlv); 3097 fo->tstate = ctlv; 3098 readsz += ctlv->head.length; 3099 ctlv = (ipfw_obj_ctlv *)((caddr_t)ctlv + ctlv->head.length); 3100 } 3101 3102 if (cfg->flags & IPFW_CFG_GET_STATIC) { 3103 /* We've requested static rules */ 3104 if (ctlv->head.type == IPFW_TLV_RULE_LIST) { 3105 rbase = (ipfw_obj_tlv *)(ctlv + 1); 3106 rcnt = ctlv->count; 3107 readsz += ctlv->head.length; 3108 ctlv = (ipfw_obj_ctlv *)((caddr_t)ctlv + 3109 ctlv->head.length); 3110 } 3111 } 3112 3113 if ((cfg->flags & IPFW_CFG_GET_STATES) && (readsz != sz)) { 3114 /* We may have some dynamic states */ 3115 dynsz = sz - readsz; 3116 /* Skip empty header */ 3117 if (dynsz != sizeof(ipfw_obj_ctlv)) 3118 dynbase = (caddr_t)ctlv; 3119 else 3120 dynsz = 0; 3121 } 3122 3123 prepare_format_opts(co, fo, rbase, rcnt, dynbase, dynsz); 3124 bp_alloc(&bp, 4096); 3125 3126 /* if no rule numbers were specified, list all rules */ 3127 if (ac == 0) { 3128 fo->first = 0; 3129 fo->last = IPFW_DEFAULT_RULE; 3130 if (cfg->flags & IPFW_CFG_GET_STATIC) 3131 list_static_range(co, fo, &bp, rbase, rcnt); 3132 3133 if (co->do_dynamic && dynsz > 0) { 3134 printf("## Dynamic rules (%d %zu):\n", fo->dcnt, 3135 dynsz); 3136 list_dyn_range(co, fo, &bp, dynbase, dynsz); 3137 } 3138 3139 bp_free(&bp); 3140 return (EX_OK); 3141 } 3142 3143 /* display specific rules requested on command line */ 3144 for (lac = ac, lav = av; lac != 0; lac--) { 3145 /* convert command line rule # */ 3146 fo->last = fo->first = strtoul(*lav++, &endptr, 10); 3147 if (*endptr == '-') 3148 fo->last = strtoul(endptr + 1, &endptr, 10); 3149 if (*endptr) { 3150 exitval = EX_USAGE; 3151 warnx("invalid rule number: %s", *(lav - 1)); 3152 continue; 3153 } 3154 3155 if ((cfg->flags & IPFW_CFG_GET_STATIC) == 0) 3156 continue; 3157 3158 if (list_static_range(co, fo, &bp, rbase, rcnt) == 0) { 3159 /* give precedence to other error(s) */ 3160 if (exitval == EX_OK) 3161 exitval = EX_UNAVAILABLE; 3162 if (fo->first == fo->last) 3163 warnx("rule %u does not exist", fo->first); 3164 else 3165 warnx("no rules in range %u-%u", 3166 fo->first, fo->last); 3167 } 3168 } 3169 3170 if (co->do_dynamic && dynsz > 0) { 3171 printf("## Dynamic rules:\n"); 3172 for (lac = ac, lav = av; lac != 0; lac--) { 3173 fo->last = fo->first = strtoul(*lav++, &endptr, 10); 3174 if (*endptr == '-') 3175 fo->last = strtoul(endptr+1, &endptr, 10); 3176 if (*endptr) 3177 /* already warned */ 3178 continue; 3179 list_dyn_range(co, fo, &bp, dynbase, dynsz); 3180 } 3181 } 3182 3183 bp_free(&bp); 3184 return (exitval); 3185 } 3186 3187 3188 /* 3189 * Retrieves current ipfw configuration of given type 3190 * and stores its pointer to @pcfg. 3191 * 3192 * Caller is responsible for freeing @pcfg. 3193 * 3194 * Returns 0 on success. 3195 */ 3196 3197 static int 3198 ipfw_get_config(struct cmdline_opts *co, struct format_opts *fo, 3199 ipfw_cfg_lheader **pcfg, size_t *psize) 3200 { 3201 ipfw_cfg_lheader *cfg; 3202 size_t sz; 3203 int i; 3204 3205 3206 if (co->test_only != 0) { 3207 fprintf(stderr, "Testing only, list disabled\n"); 3208 return (0); 3209 } 3210 3211 /* Start with some data size */ 3212 sz = 4096; 3213 cfg = NULL; 3214 3215 for (i = 0; i < 16; i++) { 3216 if (cfg != NULL) 3217 free(cfg); 3218 if ((cfg = calloc(1, sz)) == NULL) 3219 return (ENOMEM); 3220 3221 cfg->flags = fo->flags; 3222 cfg->start_rule = fo->first; 3223 cfg->end_rule = fo->last; 3224 3225 if (do_get3(IP_FW_XGET, &cfg->opheader, &sz) != 0) { 3226 if (errno != ENOMEM) { 3227 free(cfg); 3228 return (errno); 3229 } 3230 3231 /* Buffer size is not enough. Try to increase */ 3232 sz = sz * 2; 3233 if (sz < cfg->size) 3234 sz = cfg->size; 3235 continue; 3236 } 3237 3238 *pcfg = cfg; 3239 *psize = sz; 3240 return (0); 3241 } 3242 3243 free(cfg); 3244 return (ENOMEM); 3245 } 3246 3247 static int 3248 lookup_host (char *host, struct in_addr *ipaddr) 3249 { 3250 struct hostent *he; 3251 3252 if (!inet_aton(host, ipaddr)) { 3253 if ((he = gethostbyname(host)) == NULL) 3254 return(-1); 3255 *ipaddr = *(struct in_addr *)he->h_addr_list[0]; 3256 } 3257 return(0); 3258 } 3259 3260 struct tidx { 3261 ipfw_obj_ntlv *idx; 3262 uint32_t count; 3263 uint32_t size; 3264 uint16_t counter; 3265 uint8_t set; 3266 }; 3267 3268 int 3269 ipfw_check_object_name(const char *name) 3270 { 3271 int c, i, l; 3272 3273 /* 3274 * Check that name is null-terminated and contains 3275 * valid symbols only. Valid mask is: 3276 * [a-zA-Z0-9\-_\.]{1,63} 3277 */ 3278 l = strlen(name); 3279 if (l == 0 || l >= 64) 3280 return (EINVAL); 3281 for (i = 0; i < l; i++) { 3282 c = name[i]; 3283 if (isalpha(c) || isdigit(c) || c == '_' || 3284 c == '-' || c == '.') 3285 continue; 3286 return (EINVAL); 3287 } 3288 return (0); 3289 } 3290 3291 static const char *default_state_name = "default"; 3292 3293 static int 3294 state_check_name(const char *name) 3295 { 3296 3297 if (ipfw_check_object_name(name) != 0) 3298 return (EINVAL); 3299 if (strcmp(name, "any") == 0) 3300 return (EINVAL); 3301 return (0); 3302 } 3303 3304 static int 3305 eaction_check_name(const char *name) 3306 { 3307 3308 if (ipfw_check_object_name(name) != 0) 3309 return (EINVAL); 3310 /* Restrict some 'special' names */ 3311 if (match_token(rule_actions, name) != -1 && 3312 match_token(rule_action_params, name) != -1) 3313 return (EINVAL); 3314 return (0); 3315 } 3316 3317 static uint32_t 3318 pack_object(struct tidx *tstate, const char *name, int otype) 3319 { 3320 ipfw_obj_ntlv *ntlv; 3321 uint32_t i; 3322 3323 for (i = 0; i < tstate->count; i++) { 3324 if (strcmp(tstate->idx[i].name, name) != 0) 3325 continue; 3326 if (tstate->idx[i].set != tstate->set) 3327 continue; 3328 if (tstate->idx[i].head.type != otype) 3329 continue; 3330 3331 return (tstate->idx[i].idx); 3332 } 3333 3334 if (tstate->count + 1 > tstate->size) { 3335 tstate->size += 4; 3336 tstate->idx = realloc(tstate->idx, tstate->size * 3337 sizeof(ipfw_obj_ntlv)); 3338 if (tstate->idx == NULL) 3339 return (0); 3340 } 3341 3342 ntlv = &tstate->idx[i]; 3343 memset(ntlv, 0, sizeof(ipfw_obj_ntlv)); 3344 strlcpy(ntlv->name, name, sizeof(ntlv->name)); 3345 ntlv->head.type = otype; 3346 ntlv->head.length = sizeof(ipfw_obj_ntlv); 3347 ntlv->set = tstate->set; 3348 ntlv->idx = ++tstate->counter; 3349 tstate->count++; 3350 3351 return (ntlv->idx); 3352 } 3353 3354 static uint32_t 3355 pack_table(struct tidx *tstate, const char *name) 3356 { 3357 3358 if (table_check_name(name) != 0) 3359 return (0); 3360 3361 return (pack_object(tstate, name, IPFW_TLV_TBL_NAME)); 3362 } 3363 3364 /* 3365 * Parse table(NAME, value) and table(NAME,key=value) 3366 */ 3367 static void 3368 fill_table_value(ipfw_insn_lookup *cmd, char *s) 3369 { 3370 char *p; 3371 int i; 3372 3373 p = strchr(s, '='); 3374 if (p != NULL) { 3375 *p++ = '\0'; 3376 i = match_token(tvalue_names, s); 3377 if (i == -1) 3378 errx(EX_USAGE, 3379 "format: unknown table value name %s", s); 3380 } else { 3381 i = TVALUE_TAG; 3382 p = s; 3383 } 3384 3385 IPFW_SET_TVALUE_TYPE(&cmd->o, i); 3386 3387 if (i == TVALUE_NH6) { 3388 if (inet_pton(AF_INET6, p, &cmd->ip6) != 1) 3389 errx(EX_USAGE, "invalid IPv6 address provided"); 3390 /* mask in a dotted-quad notation */ 3391 } else if (strchr(p, '.') != NULL) { 3392 if (inet_aton(p, &cmd->ip4) != 1) 3393 errx(EX_USAGE, "invalid IPv4 address provided"); 3394 if (i == TVALUE_NH4) 3395 return; 3396 cmd->u32 = ntohl(cmd->u32); 3397 } else 3398 cmd->u32 = strtoul(p, NULL, 0); 3399 } 3400 3401 void 3402 fill_table(ipfw_insn *cmd, char *av, uint8_t opcode, struct tidx *tstate) 3403 { 3404 ipfw_insn_kidx *c = insntod(cmd, kidx); 3405 char *p; 3406 3407 if ((p = strchr(av + 6, ')')) == NULL) 3408 errx(EX_DATAERR, "forgotten parenthesis: '%s'", av); 3409 *p = '\0'; 3410 p = strchr(av + 6, ','); 3411 if (p) 3412 *p++ = '\0'; 3413 3414 if ((c->kidx = pack_table(tstate, av + 6)) == 0) 3415 errx(EX_DATAERR, "Invalid table name: %s", av + 6); 3416 3417 cmd->opcode = opcode; 3418 if (p) { 3419 cmd->len |= F_INSN_SIZE(ipfw_insn_lookup); 3420 IPFW_SET_LOOKUP_MATCH_TVALUE(cmd, 1); 3421 fill_table_value(insntod(cmd, lookup), p); 3422 } else { 3423 /* table(NAME) */ 3424 IPFW_SET_LOOKUP_TYPE(cmd, LOOKUP_NONE); 3425 cmd->len |= F_INSN_SIZE(ipfw_insn_kidx); 3426 } 3427 } 3428 3429 /* 3430 * fills the addr and mask fields in the instruction as appropriate from av. 3431 * Update length as appropriate. 3432 * The following formats are allowed: 3433 * me returns O_IP_*_ME 3434 * 1.2.3.4 single IP address 3435 * 1.2.3.4:5.6.7.8 address:mask 3436 * 1.2.3.4/24 address/mask 3437 * 1.2.3.4/26{1,6,5,4,23} set of addresses in a subnet 3438 * We can have multiple comma-separated address/mask entries. 3439 */ 3440 static void 3441 fill_ip(ipfw_insn_ip *cmd, char *av, int cblen, struct tidx *tstate) 3442 { 3443 int len = 0; 3444 uint32_t *d = ((ipfw_insn_u32 *)cmd)->d; 3445 3446 cmd->o.len &= ~F_LEN_MASK; /* zero len */ 3447 3448 if (_substrcmp(av, "any") == 0) 3449 return; 3450 3451 if (_substrcmp(av, "me") == 0) { 3452 cmd->o.len |= F_INSN_SIZE(ipfw_insn); 3453 return; 3454 } 3455 3456 if (strncmp(av, "table(", 6) == 0) { 3457 fill_table(&cmd->o, av, O_IP_DST_LOOKUP, tstate); 3458 return; 3459 } 3460 3461 while (av) { 3462 /* 3463 * After the address we can have '/' or ':' indicating a mask, 3464 * ',' indicating another address follows, '{' indicating a 3465 * set of addresses of unspecified size. 3466 */ 3467 char *t = NULL, *p = strpbrk(av, "/:,{"); 3468 int masklen; 3469 char md, nd = '\0'; 3470 3471 CHECK_LENGTH(cblen, (int)F_INSN_SIZE(ipfw_insn) + 2 + len); 3472 3473 if (p) { 3474 md = *p; 3475 *p++ = '\0'; 3476 if ((t = strpbrk(p, ",{")) != NULL) { 3477 nd = *t; 3478 *t = '\0'; 3479 } 3480 } else 3481 md = '\0'; 3482 3483 if (lookup_host(av, (struct in_addr *)&d[0]) != 0) 3484 errx(EX_NOHOST, "hostname ``%s'' unknown", av); 3485 switch (md) { 3486 case ':': 3487 if (!inet_aton(p, (struct in_addr *)&d[1])) 3488 errx(EX_DATAERR, "bad netmask ``%s''", p); 3489 break; 3490 case '/': 3491 masklen = atoi(p); 3492 if (masklen == 0) 3493 d[1] = htonl(0U); /* mask */ 3494 else if (masklen > 32) 3495 errx(EX_DATAERR, "bad width ``%s''", p); 3496 else 3497 d[1] = htonl(~0U << (32 - masklen)); 3498 break; 3499 case '{': /* no mask, assume /24 and put back the '{' */ 3500 d[1] = htonl(~0U << (32 - 24)); 3501 *(--p) = md; 3502 break; 3503 3504 case ',': /* single address plus continuation */ 3505 *(--p) = md; 3506 /* FALLTHROUGH */ 3507 case 0: /* initialization value */ 3508 default: 3509 d[1] = htonl(~0U); /* force /32 */ 3510 break; 3511 } 3512 d[0] &= d[1]; /* mask base address with mask */ 3513 if (t) 3514 *t = nd; 3515 /* find next separator */ 3516 if (p) 3517 p = strpbrk(p, ",{"); 3518 if (p && *p == '{') { 3519 /* 3520 * We have a set of addresses. They are stored as follows: 3521 * arg1 is the set size (powers of 2, 2..256) 3522 * addr is the base address IN HOST FORMAT 3523 * mask.. is an array of arg1 bits (rounded up to 3524 * the next multiple of 32) with bits set 3525 * for each host in the map. 3526 */ 3527 uint32_t *map = (uint32_t *)&cmd->mask; 3528 int low, high; 3529 int i = contigmask((uint8_t *)&(d[1]), 32); 3530 3531 if (len > 0) 3532 errx(EX_DATAERR, "address set cannot be in a list"); 3533 if (i < 24 || i > 31) 3534 errx(EX_DATAERR, "invalid set with mask %d\n", i); 3535 cmd->o.arg1 = 1<<(32-i); /* map length */ 3536 d[0] = ntohl(d[0]); /* base addr in host format */ 3537 cmd->o.opcode = O_IP_DST_SET; /* default */ 3538 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32) + (cmd->o.arg1+31)/32; 3539 for (i = 0; i < (cmd->o.arg1+31)/32 ; i++) 3540 map[i] = 0; /* clear map */ 3541 3542 av = p + 1; 3543 low = d[0] & 0xff; 3544 high = low + cmd->o.arg1 - 1; 3545 /* 3546 * Here, i stores the previous value when we specify a range 3547 * of addresses within a mask, e.g. 45-63. i = -1 means we 3548 * have no previous value. 3549 */ 3550 i = -1; /* previous value in a range */ 3551 while (isdigit(*av)) { 3552 char *s; 3553 int a = strtol(av, &s, 0); 3554 3555 if (s == av) { /* no parameter */ 3556 if (*av != '}') 3557 errx(EX_DATAERR, "set not closed\n"); 3558 if (i != -1) 3559 errx(EX_DATAERR, "incomplete range %d-", i); 3560 break; 3561 } 3562 if (a < low || a > high) 3563 errx(EX_DATAERR, "addr %d out of range [%d-%d]\n", 3564 a, low, high); 3565 a -= low; 3566 if (i == -1) /* no previous in range */ 3567 i = a; 3568 else { /* check that range is valid */ 3569 if (i > a) 3570 errx(EX_DATAERR, "invalid range %d-%d", 3571 i+low, a+low); 3572 if (*s == '-') 3573 errx(EX_DATAERR, "double '-' in range"); 3574 } 3575 for (; i <= a; i++) 3576 map[i/32] |= 1<<(i & 31); 3577 i = -1; 3578 if (*s == '-') 3579 i = a; 3580 else if (*s == '}') 3581 break; 3582 av = s+1; 3583 } 3584 return; 3585 } 3586 av = p; 3587 if (av) /* then *av must be a ',' */ 3588 av++; 3589 3590 /* Check this entry */ 3591 if (d[1] == 0) { /* "any", specified as x.x.x.x/0 */ 3592 /* 3593 * 'any' turns the entire list into a NOP. 3594 * 'not any' never matches, so it is removed from the 3595 * list unless it is the only item, in which case we 3596 * report an error. 3597 */ 3598 if (cmd->o.len & F_NOT) { /* "not any" never matches */ 3599 if (av == NULL && len == 0) /* only this entry */ 3600 errx(EX_DATAERR, "not any never matches"); 3601 } 3602 /* else do nothing and skip this entry */ 3603 return; 3604 } 3605 /* A single IP can be stored in an optimized format */ 3606 if (d[1] == (uint32_t)~0 && av == NULL && len == 0) { 3607 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32); 3608 return; 3609 } 3610 len += 2; /* two words... */ 3611 d += 2; 3612 } /* end while */ 3613 if (len + 1 > F_LEN_MASK) 3614 errx(EX_DATAERR, "address list too long"); 3615 cmd->o.len |= len+1; 3616 } 3617 3618 3619 /* n2mask sets n bits of the mask */ 3620 void 3621 n2mask(struct in6_addr *mask, int n) 3622 { 3623 static int minimask[9] = 3624 { 0x00, 0x80, 0xc0, 0xe0, 0xf0, 0xf8, 0xfc, 0xfe, 0xff }; 3625 u_char *p; 3626 3627 memset(mask, 0, sizeof(struct in6_addr)); 3628 p = (u_char *) mask; 3629 for (; n > 0; p++, n -= 8) { 3630 if (n >= 8) 3631 *p = 0xff; 3632 else 3633 *p = minimask[n]; 3634 } 3635 return; 3636 } 3637 3638 static void 3639 fill_flags_cmd(ipfw_insn *cmd, enum ipfw_opcodes opcode, 3640 struct _s_x *flags, char *p) 3641 { 3642 char *e; 3643 uint32_t set = 0, clear = 0; 3644 3645 if (fill_flags(flags, p, &e, &set, &clear) != 0) 3646 errx(EX_DATAERR, "invalid flag %s", e); 3647 3648 cmd->opcode = opcode; 3649 cmd->len = (cmd->len & (F_NOT | F_OR)) | 1; 3650 cmd->arg1 = (set & 0xff) | ( (clear & 0xff) << 8); 3651 } 3652 3653 3654 void 3655 ipfw_delete(char *av[]) 3656 { 3657 ipfw_range_tlv rt; 3658 char *sep; 3659 uint32_t i, j; 3660 int exitval = EX_OK; 3661 int do_set = 0; 3662 3663 av++; 3664 NEED1("missing rule specification"); 3665 if ( *av && _substrcmp(*av, "set") == 0) { 3666 /* Do not allow using the following syntax: 3667 * ipfw set N delete set M 3668 */ 3669 if (g_co.use_set) 3670 errx(EX_DATAERR, "invalid syntax"); 3671 do_set = 1; /* delete set */ 3672 av++; 3673 } 3674 3675 /* Rule number */ 3676 while (*av && isdigit(**av)) { 3677 i = strtol(*av, &sep, 10); 3678 j = i; 3679 if (*sep== '-') 3680 j = strtol(sep + 1, NULL, 10); 3681 av++; 3682 if (g_co.do_nat) { 3683 exitval = ipfw_delete_nat(i); 3684 } else if (g_co.do_pipe) { 3685 exitval = ipfw_delete_pipe(g_co.do_pipe, i); 3686 } else { 3687 memset(&rt, 0, sizeof(rt)); 3688 if (do_set != 0) { 3689 rt.set = i & 31; 3690 rt.flags = IPFW_RCFLAG_SET; 3691 } else { 3692 rt.start_rule = i; 3693 rt.end_rule = j; 3694 if (rt.start_rule == 0 && rt.end_rule == 0) 3695 rt.flags |= IPFW_RCFLAG_ALL; 3696 else 3697 rt.flags |= IPFW_RCFLAG_RANGE; 3698 if (g_co.use_set != 0) { 3699 rt.set = g_co.use_set - 1; 3700 rt.flags |= IPFW_RCFLAG_SET; 3701 } 3702 } 3703 if (g_co.do_dynamic == 2) 3704 rt.flags |= IPFW_RCFLAG_DYNAMIC; 3705 i = do_range_cmd(IP_FW_XDEL, &rt); 3706 if (i != 0) { 3707 exitval = EX_UNAVAILABLE; 3708 if (g_co.do_quiet) 3709 continue; 3710 warn("rule %u: setsockopt(IP_FW_XDEL)", 3711 rt.start_rule); 3712 } else if (rt.new_set == 0 && do_set == 0 && 3713 g_co.do_dynamic != 2) { 3714 exitval = EX_UNAVAILABLE; 3715 if (g_co.do_quiet) 3716 continue; 3717 if (rt.start_rule != rt.end_rule) 3718 warnx("no rules in %u-%u range", 3719 rt.start_rule, rt.end_rule); 3720 else 3721 warnx("rule %u not found", 3722 rt.start_rule); 3723 } 3724 } 3725 } 3726 if (exitval != EX_OK && g_co.do_force == 0) 3727 exit(exitval); 3728 } 3729 3730 /* 3731 * fill the interface structure. We do not check the name as we can 3732 * create interfaces dynamically, so checking them at insert time 3733 * makes relatively little sense. 3734 * Interface names containing '*', '?', or '[' are assumed to be shell 3735 * patterns which match interfaces. 3736 */ 3737 static void 3738 fill_iface(ipfw_insn_if *cmd, char *arg, int cblen, struct tidx *tstate) 3739 { 3740 char *p; 3741 uint32_t uidx; 3742 3743 cmd->name[0] = '\0'; 3744 cmd->o.len |= F_INSN_SIZE(ipfw_insn_if); 3745 3746 CHECK_CMDLEN; 3747 3748 /* Parse the interface or address */ 3749 if (strcmp(arg, "any") == 0) 3750 cmd->o.len = 0; /* effectively ignore this command */ 3751 else if (strncmp(arg, "table(", 6) == 0) { 3752 if ((p = strchr(arg + 6, ')')) == NULL) 3753 errx(EX_DATAERR, "forgotten parenthesis: '%s'", arg); 3754 *p = '\0'; 3755 p = strchr(arg + 6, ','); 3756 if (p) 3757 *p++ = '\0'; 3758 if ((uidx = pack_table(tstate, arg + 6)) == 0) 3759 errx(EX_DATAERR, "Invalid table name: %s", arg + 6); 3760 3761 cmd->name[0] = '\1'; /* Special value indicating table */ 3762 cmd->p.kidx = uidx; 3763 } else if (!isdigit(*arg)) { 3764 strlcpy(cmd->name, arg, sizeof(cmd->name)); 3765 cmd->p.glob = strpbrk(arg, "*?[") != NULL ? 1 : 0; 3766 } else if (!inet_aton(arg, &cmd->p.ip)) 3767 errx(EX_DATAERR, "bad ip address ``%s''", arg); 3768 } 3769 3770 static void 3771 get_mac_addr_mask(const char *p, uint8_t *addr, uint8_t *mask) 3772 { 3773 int i; 3774 size_t l; 3775 char *ap, *ptr, *optr; 3776 struct ether_addr *mac; 3777 const char *macset = "0123456789abcdefABCDEF:"; 3778 3779 if (strcmp(p, "any") == 0) { 3780 for (i = 0; i < ETHER_ADDR_LEN; i++) 3781 addr[i] = mask[i] = 0; 3782 return; 3783 } 3784 3785 optr = ptr = strdup(p); 3786 if ((ap = strsep(&ptr, "&/")) != NULL && *ap != 0) { 3787 l = strlen(ap); 3788 if (strspn(ap, macset) != l || (mac = ether_aton(ap)) == NULL) 3789 errx(EX_DATAERR, "Incorrect MAC address"); 3790 bcopy(mac, addr, ETHER_ADDR_LEN); 3791 } else 3792 errx(EX_DATAERR, "Incorrect MAC address"); 3793 3794 if (ptr != NULL) { /* we have mask? */ 3795 if (p[ptr - optr - 1] == '/') { /* mask len */ 3796 long ml = strtol(ptr, &ap, 10); 3797 if (*ap != 0 || ml > ETHER_ADDR_LEN * 8 || ml < 0) 3798 errx(EX_DATAERR, "Incorrect mask length"); 3799 for (i = 0; ml > 0 && i < ETHER_ADDR_LEN; ml -= 8, i++) 3800 mask[i] = (ml >= 8) ? 0xff: (~0) << (8 - ml); 3801 } else { /* mask */ 3802 l = strlen(ptr); 3803 if (strspn(ptr, macset) != l || 3804 (mac = ether_aton(ptr)) == NULL) 3805 errx(EX_DATAERR, "Incorrect mask"); 3806 bcopy(mac, mask, ETHER_ADDR_LEN); 3807 } 3808 } else { /* default mask: ff:ff:ff:ff:ff:ff */ 3809 for (i = 0; i < ETHER_ADDR_LEN; i++) 3810 mask[i] = 0xff; 3811 } 3812 for (i = 0; i < ETHER_ADDR_LEN; i++) 3813 addr[i] &= mask[i]; 3814 3815 free(optr); 3816 } 3817 3818 /* 3819 * helper function, updates the pointer to cmd with the length 3820 * of the current command, and also cleans up the first word of 3821 * the new command in case it has been clobbered before. 3822 */ 3823 static ipfw_insn * 3824 next_cmd(ipfw_insn *cmd, int *len) 3825 { 3826 *len -= F_LEN(cmd); 3827 CHECK_LENGTH(*len, 0); 3828 cmd += F_LEN(cmd); 3829 bzero(cmd, sizeof(*cmd)); 3830 return cmd; 3831 } 3832 3833 /* 3834 * Takes arguments and copies them into a comment 3835 */ 3836 static void 3837 fill_comment(ipfw_insn *cmd, char **av, int cblen) 3838 { 3839 int i, l; 3840 char *p = (char *)(cmd + 1); 3841 3842 cmd->opcode = O_NOP; 3843 cmd->len = (cmd->len & (F_NOT | F_OR)); 3844 3845 /* Compute length of comment string. */ 3846 for (i = 0, l = 0; av[i] != NULL; i++) 3847 l += strlen(av[i]) + 1; 3848 if (l == 0) 3849 return; 3850 if (l > 84) 3851 errx(EX_DATAERR, 3852 "comment too long (max 80 chars)"); 3853 l = 1 + (l+3)/4; 3854 cmd->len = (cmd->len & (F_NOT | F_OR)) | l; 3855 CHECK_CMDLEN; 3856 3857 for (i = 0; av[i] != NULL; i++) { 3858 strcpy(p, av[i]); 3859 p += strlen(av[i]); 3860 *p++ = ' '; 3861 } 3862 *(--p) = '\0'; 3863 } 3864 3865 /* 3866 * A function to fill simple commands of size 1. 3867 * Existing flags are preserved. 3868 */ 3869 static void 3870 fill_cmd(ipfw_insn *cmd, enum ipfw_opcodes opcode, int flags, uint16_t arg) 3871 { 3872 cmd->opcode = opcode; 3873 cmd->len = ((cmd->len | flags) & (F_NOT | F_OR)) | 1; 3874 cmd->arg1 = arg; 3875 } 3876 3877 /* 3878 * Fetch and add the MAC address and type, with masks. This generates one or 3879 * two microinstructions, and returns the pointer to the last one. 3880 */ 3881 static ipfw_insn * 3882 add_mac(ipfw_insn *cmd, char *av[], int cblen) 3883 { 3884 ipfw_insn_mac *mac; 3885 3886 if ( ( av[0] == NULL ) || ( av[1] == NULL ) ) 3887 errx(EX_DATAERR, "MAC dst src"); 3888 3889 cmd->opcode = O_MACADDR2; 3890 cmd->len = (cmd->len & (F_NOT | F_OR)) | F_INSN_SIZE(ipfw_insn_mac); 3891 CHECK_CMDLEN; 3892 3893 mac = (ipfw_insn_mac *)cmd; 3894 get_mac_addr_mask(av[0], mac->addr, mac->mask); /* dst */ 3895 get_mac_addr_mask(av[1], &(mac->addr[ETHER_ADDR_LEN]), 3896 &(mac->mask[ETHER_ADDR_LEN])); /* src */ 3897 return cmd; 3898 } 3899 3900 static ipfw_insn * 3901 add_mactype(ipfw_insn *cmd, char *av, int cblen) 3902 { 3903 if (!av) 3904 errx(EX_DATAERR, "missing MAC type"); 3905 if (strcmp(av, "any") != 0) { /* we have a non-null type */ 3906 fill_newports((ipfw_insn_u16 *)cmd, av, IPPROTO_ETHERTYPE, 3907 cblen); 3908 cmd->opcode = O_MAC_TYPE; 3909 return cmd; 3910 } else 3911 return NULL; 3912 } 3913 3914 static ipfw_insn * 3915 add_proto0(ipfw_insn *cmd, char *av, u_char *protop) 3916 { 3917 struct protoent *pe; 3918 char *ep; 3919 int proto; 3920 3921 proto = strtol(av, &ep, 10); 3922 if (*ep != '\0' || proto <= 0) { 3923 if ((pe = getprotobyname(av)) == NULL) 3924 return NULL; 3925 proto = pe->p_proto; 3926 } 3927 3928 fill_cmd(cmd, O_PROTO, 0, proto); 3929 *protop = proto; 3930 return cmd; 3931 } 3932 3933 static ipfw_insn * 3934 add_proto(ipfw_insn *cmd, char *av, u_char *protop) 3935 { 3936 u_char proto = IPPROTO_IP; 3937 3938 if (_substrcmp(av, "all") == 0 || strcmp(av, "ip") == 0) 3939 ; /* do not set O_IP4 nor O_IP6 */ 3940 else if (strcmp(av, "ip4") == 0) 3941 /* explicit "just IPv4" rule */ 3942 fill_cmd(cmd, O_IP4, 0, 0); 3943 else if (strcmp(av, "ip6") == 0) { 3944 /* explicit "just IPv6" rule */ 3945 proto = IPPROTO_IPV6; 3946 fill_cmd(cmd, O_IP6, 0, 0); 3947 } else 3948 return add_proto0(cmd, av, protop); 3949 3950 *protop = proto; 3951 return cmd; 3952 } 3953 3954 static ipfw_insn * 3955 add_proto_compat(ipfw_insn *cmd, char *av, u_char *protop) 3956 { 3957 u_char proto = IPPROTO_IP; 3958 3959 if (_substrcmp(av, "all") == 0 || strcmp(av, "ip") == 0) 3960 ; /* do not set O_IP4 nor O_IP6 */ 3961 else if (strcmp(av, "ipv4") == 0 || strcmp(av, "ip4") == 0) 3962 /* explicit "just IPv4" rule */ 3963 fill_cmd(cmd, O_IP4, 0, 0); 3964 else if (strcmp(av, "ipv6") == 0 || strcmp(av, "ip6") == 0) { 3965 /* explicit "just IPv6" rule */ 3966 proto = IPPROTO_IPV6; 3967 fill_cmd(cmd, O_IP6, 0, 0); 3968 } else 3969 return add_proto0(cmd, av, protop); 3970 3971 *protop = proto; 3972 return cmd; 3973 } 3974 3975 static ipfw_insn * 3976 add_srcip(ipfw_insn *cmd, char *av, int cblen, struct tidx *tstate) 3977 { 3978 fill_ip((ipfw_insn_ip *)cmd, av, cblen, tstate); 3979 if (cmd->opcode == O_IP_DST_SET) /* set */ 3980 cmd->opcode = O_IP_SRC_SET; 3981 else if (cmd->opcode == O_IP_DST_LOOKUP) /* table */ 3982 cmd->opcode = O_IP_SRC_LOOKUP; 3983 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn)) /* me */ 3984 cmd->opcode = O_IP_SRC_ME; 3985 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_u32)) /* one IP */ 3986 cmd->opcode = O_IP_SRC; 3987 else /* addr/mask */ 3988 cmd->opcode = O_IP_SRC_MASK; 3989 return cmd; 3990 } 3991 3992 static ipfw_insn * 3993 add_dstip(ipfw_insn *cmd, char *av, int cblen, struct tidx *tstate) 3994 { 3995 fill_ip((ipfw_insn_ip *)cmd, av, cblen, tstate); 3996 if (cmd->opcode == O_IP_DST_SET) /* set */ 3997 ; 3998 else if (cmd->opcode == O_IP_DST_LOOKUP) /* table */ 3999 ; 4000 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn)) /* me */ 4001 cmd->opcode = O_IP_DST_ME; 4002 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_u32)) /* one IP */ 4003 cmd->opcode = O_IP_DST; 4004 else /* addr/mask */ 4005 cmd->opcode = O_IP_DST_MASK; 4006 return cmd; 4007 } 4008 4009 static ipfw_insn * 4010 add_srcmac(ipfw_insn *cmd, char *av, struct tidx *tstate) 4011 { 4012 4013 if (strncmp(av, "table(", 6) == 0) 4014 fill_table(cmd, av, O_MAC_SRC_LOOKUP, tstate); 4015 else 4016 errx(EX_DATAERR, "only mac table lookup is supported %s", av); 4017 return cmd; 4018 } 4019 4020 static ipfw_insn * 4021 add_dstmac(ipfw_insn *cmd, char *av, struct tidx *tstate) 4022 { 4023 4024 if (strncmp(av, "table(", 6) == 0) 4025 fill_table(cmd, av, O_MAC_DST_LOOKUP, tstate); 4026 else 4027 errx(EX_DATAERR, "only mac table lookup is supported %s", av); 4028 return cmd; 4029 } 4030 4031 4032 static struct _s_x f_reserved_keywords[] = { 4033 { "altq", TOK_OR }, 4034 { "//", TOK_OR }, 4035 { "diverted", TOK_OR }, 4036 { "dst-port", TOK_OR }, 4037 { "src-port", TOK_OR }, 4038 { "established", TOK_OR }, 4039 { "keep-state", TOK_OR }, 4040 { "frag", TOK_OR }, 4041 { "icmptypes", TOK_OR }, 4042 { "in", TOK_OR }, 4043 { "out", TOK_OR }, 4044 { "ip6", TOK_OR }, 4045 { "any", TOK_OR }, 4046 { "to", TOK_OR }, 4047 { "via", TOK_OR }, 4048 { "{", TOK_OR }, 4049 { "lookup", TOK_OR }, 4050 { "tagged", TOK_OR }, 4051 { NULL, 0 } /* terminator */ 4052 }; 4053 4054 static ipfw_insn * 4055 add_ports(ipfw_insn *cmd, char *av, u_char proto, int opcode, int cblen) 4056 { 4057 4058 if (match_token(f_reserved_keywords, av) != -1) 4059 return (NULL); 4060 4061 if (fill_newports((ipfw_insn_u16 *)cmd, av, proto, cblen)) { 4062 /* XXX todo: check that we have a protocol with ports */ 4063 cmd->opcode = opcode; 4064 return cmd; 4065 } 4066 return NULL; 4067 } 4068 4069 static ipfw_insn * 4070 add_src(ipfw_insn *cmd, char *av, u_char proto, int cblen, struct tidx *tstate) 4071 { 4072 struct in6_addr a; 4073 char *host, *ch, buf[INET6_ADDRSTRLEN]; 4074 ipfw_insn *ret = NULL; 4075 size_t len; 4076 4077 /* Copy first address in set if needed */ 4078 if ((ch = strpbrk(av, "/,")) != NULL) { 4079 len = ch - av; 4080 strlcpy(buf, av, sizeof(buf)); 4081 if (len < sizeof(buf)) 4082 buf[len] = '\0'; 4083 host = buf; 4084 } else 4085 host = av; 4086 4087 if (proto == IPPROTO_IPV6 || strcmp(av, "me6") == 0 || 4088 inet_pton(AF_INET6, host, &a) == 1) 4089 ret = add_srcip6(cmd, av, cblen, tstate); 4090 /* XXX: should check for IPv4, not !IPv6 */ 4091 if (ret == NULL && (proto == IPPROTO_IP || strcmp(av, "me") == 0 || 4092 inet_pton(AF_INET6, host, &a) != 1)) 4093 ret = add_srcip(cmd, av, cblen, tstate); 4094 if (ret == NULL && strcmp(av, "any") != 0) 4095 ret = cmd; 4096 4097 return ret; 4098 } 4099 4100 static ipfw_insn * 4101 add_dst(ipfw_insn *cmd, char *av, u_char proto, int cblen, struct tidx *tstate) 4102 { 4103 struct in6_addr a; 4104 char *host, *ch, buf[INET6_ADDRSTRLEN]; 4105 ipfw_insn *ret = NULL; 4106 size_t len; 4107 4108 /* Copy first address in set if needed */ 4109 if ((ch = strpbrk(av, "/,")) != NULL) { 4110 len = ch - av; 4111 strlcpy(buf, av, sizeof(buf)); 4112 if (len < sizeof(buf)) 4113 buf[len] = '\0'; 4114 host = buf; 4115 } else 4116 host = av; 4117 4118 if (proto == IPPROTO_IPV6 || strcmp(av, "me6") == 0 || 4119 inet_pton(AF_INET6, host, &a) == 1) 4120 ret = add_dstip6(cmd, av, cblen, tstate); 4121 /* XXX: should check for IPv4, not !IPv6 */ 4122 if (ret == NULL && (proto == IPPROTO_IP || strcmp(av, "me") == 0 || 4123 inet_pton(AF_INET6, host, &a) != 1)) 4124 ret = add_dstip(cmd, av, cblen, tstate); 4125 if (ret == NULL && strcmp(av, "any") != 0) 4126 ret = cmd; 4127 4128 return ret; 4129 } 4130 4131 static uint16_t 4132 parse_logdst(char *logdst_iter) 4133 { 4134 char *token; 4135 uint16_t ret; 4136 4137 ret = IPFW_LOG_DEFAULT; 4138 while ((token = strsep(&logdst_iter, ",")) != NULL) { 4139 if (_substrcmp(token, "syslog") == 0) { 4140 ret |= IPFW_LOG_SYSLOG; 4141 continue; 4142 } 4143 /* ipfw0 is compatibility keyword. */ 4144 if (_substrcmp(token, "bpf") == 0 || 4145 _substrcmp(token, "ipfw0") == 0) { 4146 ret |= IPFW_LOG_IPFW0; 4147 continue; 4148 } 4149 if (_substrcmp(token, "rtsock") == 0) { 4150 ret |= IPFW_LOG_RTSOCK; 4151 continue; 4152 } 4153 errx(EX_DATAERR, 4154 "unsupported logdst token"); 4155 } 4156 return (ret); 4157 } 4158 4159 static inline uint32_t 4160 arg_or_targ_relaxed(const char *arg, const char *action, uint32_t maxarg) 4161 { 4162 uint32_t arg1 = (uint32_t)(-1); 4163 4164 if (arg == NULL) 4165 errx(EX_USAGE, "missing argument for %s", action); 4166 if (isdigit(arg[0])) { 4167 arg1 = strtoul(arg, NULL, 10); 4168 if (arg1 < IPFW_ARG_MIN || arg1 > maxarg) 4169 errx(EX_DATAERR, "illegal argument %s(%u) for %s", 4170 arg, arg1, action); 4171 } else if (_substrcmp(arg, "tablearg") == 0) 4172 arg1 = IP_FW_TARG; 4173 return (arg1); 4174 } 4175 4176 static inline uint32_t 4177 arg_or_targ(const char *arg, const char *action) 4178 { 4179 uint32_t arg1 = arg_or_targ_relaxed(arg, action, IPFW_ARG_MAX); 4180 4181 if (arg1 == (uint32_t)(-1)) 4182 errx(EX_DATAERR, "illegal argument %s(%u) for %s", 4183 arg, arg1, action); 4184 return (arg1); 4185 } 4186 4187 static uint16_t 4188 get_divert_port(const char *arg, const char *action) 4189 { 4190 uint32_t arg1 = arg_or_targ_relaxed(arg, action, IPFW_ARG_MAX); 4191 4192 if (arg1 != (uint32_t)(-1)) 4193 return (arg1); 4194 4195 struct servent *s; 4196 setservent(1); 4197 s = getservbyname(arg, "divert"); 4198 if (s == NULL) 4199 errx(EX_DATAERR, "illegal divert/tee port"); 4200 return (ntohs(s->s_port)); 4201 } 4202 4203 static void 4204 get_lookup_bitmask(int ltype, ipfw_insn_lookup *cmd, const char *src) 4205 { 4206 struct ether_addr *mac; 4207 const char *macset = "0123456789abcdefABCDEF:"; 4208 4209 if (ltype == LOOKUP_SRC_IP6 || ltype == LOOKUP_DST_IP6) { 4210 if (inet_pton(AF_INET6, src, &cmd->ip6) != 1) 4211 errx(EX_USAGE, "invalid IPv6 mask provided"); 4212 return; 4213 } else if (ltype == LOOKUP_SRC_MAC || ltype == LOOKUP_DST_MAC) { 4214 if (strspn(src, macset) != strlen(src) || 4215 (mac = ether_aton(src)) == NULL) 4216 errx(EX_DATAERR, "Incorrect MAC address"); 4217 4218 bcopy(mac, cmd->mac, ETHER_ADDR_LEN); 4219 return; 4220 /* mask in a dotted-quad notation */ 4221 } else if (strchr(src, '.') != NULL) { 4222 if (inet_aton(src, &cmd->ip4) != 1) 4223 errx(EX_USAGE, "invalid dotted-quad mask provided"); 4224 switch (ltype) { 4225 case LOOKUP_SRC_IP4: 4226 case LOOKUP_DST_IP4: 4227 return; 4228 } 4229 cmd->u32 = ntohl(cmd->u32); 4230 return; 4231 } 4232 cmd->u32 = strtoul(src, NULL, 0); 4233 } 4234 4235 /* 4236 * Parse arguments and assemble the microinstructions which make up a rule. 4237 * Rules are added into the 'rulebuf' and then copied in the correct order 4238 * into the actual rule. 4239 * 4240 * The syntax for a rule starts with the action, followed by 4241 * optional action parameters, and the various match patterns. 4242 * In the assembled microcode, the first opcode must be an O_PROBE_STATE 4243 * (generated if the rule includes a keep-state option), then the 4244 * various match patterns, log/altq actions, and the actual action. 4245 * 4246 */ 4247 static void 4248 compile_rule(char *av[], uint32_t *rbuf, int *rbufsize, struct tidx *tstate) 4249 { 4250 /* 4251 * rules are added into the 'rulebuf' and then copied in 4252 * the correct order into the actual rule. 4253 * Some things that need to go out of order (prob, action etc.) 4254 * go into actbuf[]. 4255 */ 4256 static uint32_t actbuf[255], cmdbuf[255]; 4257 int rblen, ablen, cblen; 4258 4259 ipfw_insn *src, *dst, *cmd, *action, *prev=NULL; 4260 ipfw_insn *first_cmd; /* first match pattern */ 4261 4262 struct ip_fw_rule *rule; 4263 4264 /* 4265 * various flags used to record that we entered some fields. 4266 */ 4267 ipfw_insn *have_state = NULL; /* any state-related option */ 4268 int have_rstate = 0; 4269 ipfw_insn *have_log = NULL, *have_altq = NULL, *have_tag = NULL; 4270 ipfw_insn *have_skipcmd = NULL; 4271 size_t len; 4272 4273 int i; 4274 4275 int open_par = 0; /* open parenthesis ( */ 4276 4277 /* proto is here because it is used to fetch ports */ 4278 u_char proto = IPPROTO_IP; /* default protocol */ 4279 4280 double match_prob = 1; /* match probability, default is always match */ 4281 4282 bzero(actbuf, sizeof(actbuf)); /* actions go here */ 4283 bzero(cmdbuf, sizeof(cmdbuf)); 4284 bzero(rbuf, *rbufsize); 4285 4286 rule = (struct ip_fw_rule *)rbuf; 4287 cmd = (ipfw_insn *)cmdbuf; 4288 action = (ipfw_insn *)actbuf; 4289 4290 rblen = *rbufsize / sizeof(uint32_t); 4291 rblen -= sizeof(struct ip_fw_rule) / sizeof(uint32_t); 4292 ablen = nitems(actbuf); 4293 cblen = nitems(cmdbuf); 4294 cblen -= F_INSN_SIZE(ipfw_insn_u32) + 1; 4295 4296 #define CHECK_RBUFLEN(len) { CHECK_LENGTH(rblen, len); rblen -= len; } 4297 #define CHECK_ACTLEN CHECK_LENGTH(ablen, action->len) 4298 4299 av++; 4300 4301 /* [rule N] -- Rule number optional */ 4302 if (av[0] && isdigit(**av)) { 4303 rule->rulenum = atoi(*av); 4304 av++; 4305 } 4306 4307 /* [set N] -- set number (0..RESVD_SET), optional */ 4308 if (av[0] && av[1] && _substrcmp(*av, "set") == 0) { 4309 int set = strtoul(av[1], NULL, 10); 4310 if (set < 0 || set > RESVD_SET) 4311 errx(EX_DATAERR, "illegal set %s", av[1]); 4312 rule->set = set; 4313 tstate->set = set; 4314 av += 2; 4315 } 4316 4317 /* [prob D] -- match probability, optional */ 4318 if (av[0] && av[1] && _substrcmp(*av, "prob") == 0) { 4319 match_prob = strtod(av[1], NULL); 4320 4321 if (match_prob <= 0 || match_prob > 1) 4322 errx(EX_DATAERR, "illegal match prob. %s", av[1]); 4323 av += 2; 4324 } 4325 4326 /* action -- mandatory */ 4327 NEED1("missing action"); 4328 i = match_token(rule_actions, *av); 4329 av++; 4330 action->len = 1; /* default */ 4331 CHECK_ACTLEN; 4332 switch(i) { 4333 case TOK_CHECKSTATE: 4334 have_state = action; 4335 action->opcode = O_CHECK_STATE; 4336 action->len = F_INSN_SIZE(ipfw_insn_kidx); 4337 CHECK_ACTLEN; 4338 if (*av == NULL || 4339 match_token(rule_options, *av) == TOK_COMMENT) { 4340 insntod(have_state, kidx)->kidx = pack_object(tstate, 4341 default_state_name, IPFW_TLV_STATE_NAME); 4342 break; 4343 } 4344 if (*av[0] == ':') { 4345 if (strcmp(*av + 1, "any") == 0) 4346 insntod(have_state, kidx)->kidx = 0; 4347 else if (state_check_name(*av + 1) == 0) 4348 insntod(have_state, kidx)->kidx = pack_object( 4349 tstate, *av + 1, IPFW_TLV_STATE_NAME); 4350 else 4351 errx(EX_DATAERR, "Invalid state name %s", 4352 *av); 4353 av++; 4354 break; 4355 } 4356 errx(EX_DATAERR, "Invalid state name %s", *av); 4357 break; 4358 4359 case TOK_ABORT: 4360 action->opcode = O_REJECT; 4361 action->arg1 = ICMP_REJECT_ABORT; 4362 break; 4363 4364 case TOK_ABORT6: 4365 action->opcode = O_UNREACH6; 4366 action->arg1 = ICMP6_UNREACH_ABORT; 4367 break; 4368 4369 case TOK_ACCEPT: 4370 action->opcode = O_ACCEPT; 4371 break; 4372 4373 case TOK_DENY: 4374 action->opcode = O_DENY; 4375 action->arg1 = 0; 4376 break; 4377 4378 case TOK_REJECT: 4379 action->opcode = O_REJECT; 4380 action->arg1 = ICMP_UNREACH_HOST; 4381 break; 4382 4383 case TOK_RESET: 4384 action->opcode = O_REJECT; 4385 action->arg1 = ICMP_REJECT_RST; 4386 break; 4387 4388 case TOK_RESET6: 4389 action->opcode = O_UNREACH6; 4390 action->arg1 = ICMP6_UNREACH_RST; 4391 break; 4392 4393 case TOK_UNREACH: 4394 action->opcode = O_REJECT; 4395 NEED1("missing reject code"); 4396 action->arg1 = get_reject_code(*av); 4397 av++; 4398 if (action->arg1 == ICMP_UNREACH_NEEDFRAG && isdigit(**av)) { 4399 uint16_t mtu; 4400 4401 mtu = strtoul(*av, NULL, 10); 4402 if (mtu < 68 || mtu >= IP_MAXPACKET) 4403 errx(EX_DATAERR, "illegal argument for %s", 4404 *(av - 1)); 4405 action->len = F_INSN_SIZE(ipfw_insn_u16); 4406 insntod(action, u16)->ports[0] = mtu; 4407 av++; 4408 } 4409 break; 4410 4411 case TOK_UNREACH6: 4412 action->opcode = O_UNREACH6; 4413 NEED1("missing unreach code"); 4414 action->arg1 = get_unreach6_code(*av); 4415 av++; 4416 break; 4417 4418 case TOK_COUNT: 4419 action->opcode = O_COUNT; 4420 break; 4421 4422 case TOK_NAT: 4423 action->opcode = O_NAT; 4424 action->len = F_INSN_SIZE(ipfw_insn_nat); 4425 CHECK_ACTLEN; 4426 if (*av != NULL && _substrcmp(*av, "global") == 0) 4427 action->arg1 = IP_FW_NAT44_GLOBAL; 4428 else 4429 action->arg1 = arg_or_targ(av[0], *(av - 1)); 4430 av++; 4431 break; 4432 case TOK_QUEUE: 4433 action->opcode = O_QUEUE; 4434 action->arg1 = arg_or_targ(av[0], *(av - 1)); 4435 av++; 4436 break; 4437 case TOK_PIPE: 4438 action->opcode = O_PIPE; 4439 action->arg1 = arg_or_targ(av[0], *(av - 1)); 4440 av++; 4441 break; 4442 case TOK_SKIPTO: 4443 action->opcode = O_SKIPTO; 4444 action->len = F_INSN_SIZE(ipfw_insn_u32); 4445 CHECK_ACTLEN; 4446 insntod(action, u32)->d[0] = 4447 arg_or_targ_relaxed(av[0], *(av - 1), IPFW_DEFAULT_RULE); 4448 av++; 4449 break; 4450 case TOK_NETGRAPH: 4451 action->opcode = O_NETGRAPH; 4452 action->arg1 = arg_or_targ(av[0], *(av - 1)); 4453 av++; 4454 break; 4455 case TOK_NGTEE: 4456 action->opcode = O_NGTEE; 4457 action->arg1 = arg_or_targ(av[0], *(av - 1)); 4458 av++; 4459 break; 4460 case TOK_DIVERT: 4461 action->opcode = O_DIVERT; 4462 action->arg1 = get_divert_port(av[0], *(av - 1)); 4463 av++; 4464 break; 4465 case TOK_TEE: 4466 action->opcode = O_TEE; 4467 action->arg1 = get_divert_port(av[0], *(av - 1)); 4468 av++; 4469 break; 4470 case TOK_CALL: 4471 action->opcode = O_CALLRETURN; 4472 action->len = F_INSN_SIZE(ipfw_insn_u32); 4473 CHECK_ACTLEN; 4474 insntod(action, u32)->d[0] = 4475 arg_or_targ_relaxed(av[0], *(av - 1), IPFW_DEFAULT_RULE); 4476 av++; 4477 break; 4478 4479 case TOK_FORWARD: { 4480 /* 4481 * Locate the address-port separator (':' or ','). 4482 * Could be one of the following: 4483 * hostname:port 4484 * IPv4 a.b.c.d,port 4485 * IPv4 a.b.c.d:port 4486 * IPv6 w:x:y::z,port 4487 * IPv6 [w:x:y::z]:port 4488 */ 4489 struct sockaddr_storage result; 4490 struct addrinfo *res; 4491 char *s, *end; 4492 int family; 4493 u_short port_number = 0; 4494 4495 NEED1("missing forward address[:port]"); 4496 4497 if (strncmp(*av, "tablearg", 8) == 0 && 4498 ((*av)[8] == '\0' || (*av)[8] == ',' || (*av)[8] == ':')) 4499 memcpy(++(*av), "0.0.0.0", 7); 4500 4501 /* 4502 * Are we an bracket-enclosed IPv6 address? 4503 */ 4504 if (strchr(*av, '[')) 4505 (*av)++; 4506 4507 /* 4508 * locate the address-port separator (':' or ',') 4509 */ 4510 s = strchr(*av, ','); 4511 if (s == NULL) { 4512 s = strchr(*av, ']'); 4513 /* Prevent erroneous parsing on brackets. */ 4514 if (s != NULL) 4515 *(s++) = '\0'; 4516 else 4517 s = *av; 4518 4519 /* Distinguish between IPv4:port and IPv6 cases. */ 4520 s = strchr(s, ':'); 4521 if (s && strchr(s+1, ':')) 4522 s = NULL; /* no port */ 4523 } 4524 4525 if (s != NULL) { 4526 /* Terminate host portion and set s to start of port. */ 4527 *(s++) = '\0'; 4528 i = strtoport(s, &end, 0 /* base */, 0 /* proto */); 4529 if (s == end) 4530 errx(EX_DATAERR, 4531 "illegal forwarding port ``%s''", s); 4532 port_number = (u_short)i; 4533 } 4534 4535 /* 4536 * Resolve the host name or address to a family and a 4537 * network representation of the address. 4538 */ 4539 if (getaddrinfo(*av, NULL, NULL, &res)) 4540 errx(EX_DATAERR, NULL); 4541 /* Just use the first host in the answer. */ 4542 family = res->ai_family; 4543 memcpy(&result, res->ai_addr, res->ai_addrlen); 4544 freeaddrinfo(res); 4545 4546 if (family == PF_INET) { 4547 ipfw_insn_sa *p = (ipfw_insn_sa *)action; 4548 4549 action->opcode = O_FORWARD_IP; 4550 action->len = F_INSN_SIZE(ipfw_insn_sa); 4551 CHECK_ACTLEN; 4552 4553 /* 4554 * In the kernel we assume AF_INET and use only 4555 * sin_port and sin_addr. Remember to set sin_len as 4556 * the routing code seems to use it too. 4557 */ 4558 p->sa.sin_len = sizeof(struct sockaddr_in); 4559 p->sa.sin_family = AF_INET; 4560 p->sa.sin_port = port_number; 4561 p->sa.sin_addr.s_addr = 4562 ((struct sockaddr_in *)&result)->sin_addr.s_addr; 4563 } else if (family == PF_INET6) { 4564 ipfw_insn_sa6 *p = (ipfw_insn_sa6 *)action; 4565 4566 action->opcode = O_FORWARD_IP6; 4567 action->len = F_INSN_SIZE(ipfw_insn_sa6); 4568 CHECK_ACTLEN; 4569 4570 p->sa.sin6_len = sizeof(struct sockaddr_in6); 4571 p->sa.sin6_family = AF_INET6; 4572 p->sa.sin6_port = port_number; 4573 p->sa.sin6_flowinfo = 0; 4574 p->sa.sin6_scope_id = 4575 ((struct sockaddr_in6 *)&result)->sin6_scope_id; 4576 bcopy(&((struct sockaddr_in6*)&result)->sin6_addr, 4577 &p->sa.sin6_addr, sizeof(p->sa.sin6_addr)); 4578 } else { 4579 errx(EX_DATAERR, "Invalid address family in forward action"); 4580 } 4581 av++; 4582 break; 4583 } 4584 case TOK_COMMENT: 4585 /* pretend it is a 'count' rule followed by the comment */ 4586 action->opcode = O_COUNT; 4587 av--; /* go back... */ 4588 break; 4589 4590 case TOK_SETFIB: 4591 { 4592 int numfibs; 4593 size_t intsize = sizeof(int); 4594 4595 action->opcode = O_SETFIB; 4596 NEED1("missing fib number"); 4597 if (_substrcmp(*av, "tablearg") == 0) { 4598 action->arg1 = IP_FW_TARG; 4599 } else { 4600 action->arg1 = strtoul(*av, NULL, 10); 4601 if (sysctlbyname("net.fibs", &numfibs, &intsize, 4602 NULL, 0) == -1) 4603 errx(EX_DATAERR, "fibs not supported.\n"); 4604 if (action->arg1 >= numfibs) /* Temporary */ 4605 errx(EX_DATAERR, "fib too large.\n"); 4606 /* Add high-order bit to fib to make room for tablearg*/ 4607 action->arg1 |= 0x8000; 4608 } 4609 av++; 4610 break; 4611 } 4612 4613 case TOK_SETDSCP: 4614 { 4615 int code; 4616 4617 action->opcode = O_SETDSCP; 4618 NEED1("missing DSCP code"); 4619 if (_substrcmp(*av, "tablearg") == 0) { 4620 action->arg1 = IP_FW_TARG; 4621 } else { 4622 if (isalpha(*av[0])) { 4623 if ((code = match_token(f_ipdscp, *av)) == -1) 4624 errx(EX_DATAERR, "Unknown DSCP code"); 4625 action->arg1 = code; 4626 } else 4627 action->arg1 = strtoul(*av, NULL, 10); 4628 /* 4629 * Add high-order bit to DSCP to make room 4630 * for tablearg 4631 */ 4632 action->arg1 |= 0x8000; 4633 } 4634 av++; 4635 break; 4636 } 4637 4638 case TOK_REASS: 4639 action->opcode = O_REASS; 4640 break; 4641 4642 case TOK_RETURN: 4643 action->opcode = O_CALLRETURN; 4644 action->len = F_INSN_SIZE(ipfw_insn_u32) | F_NOT; 4645 CHECK_ACTLEN; 4646 if (*av != NULL) { 4647 /* 4648 * Return type is optional. 4649 * By default we use RETURN_NEXT_RULENUM. 4650 */ 4651 i = match_token(return_types, *av); 4652 if (i >= 0) { 4653 action->arg1 = i; 4654 av++; 4655 } else 4656 action->arg1 = RETURN_NEXT_RULENUM; 4657 } 4658 break; 4659 4660 case TOK_SETMARK: { 4661 action->opcode = O_SETMARK; 4662 action->len = F_INSN_SIZE(ipfw_insn_u32); 4663 NEED1("missing mark"); 4664 if (strcmp(*av, "tablearg") == 0) { 4665 action->arg1 = IP_FW_TARG; 4666 } else { 4667 insntod(action, u32)->d[0] = strtoul(*av, NULL, 0); 4668 /* This is not a tablearg */ 4669 action->arg1 |= 0x8000; 4670 } 4671 av++; 4672 CHECK_CMDLEN; 4673 break; 4674 } 4675 4676 case TOK_TCPSETMSS: { 4677 u_long mss; 4678 uint32_t idx; 4679 4680 idx = pack_object(tstate, "tcp-setmss", IPFW_TLV_EACTION); 4681 if (idx == 0) 4682 errx(EX_DATAERR, "pack_object failed"); 4683 action->opcode = O_EXTERNAL_ACTION; 4684 action->len = F_INSN_SIZE(ipfw_insn_kidx); 4685 CHECK_ACTLEN; 4686 insntod(action, kidx)->kidx = idx; 4687 4688 NEED1("Missing MSS value"); 4689 action = next_cmd(action, &ablen); 4690 action->len = 1; 4691 CHECK_ACTLEN; 4692 mss = strtoul(*av, NULL, 10); 4693 if (mss == 0 || mss > UINT16_MAX) 4694 errx(EX_USAGE, "invalid MSS value %s", *av); 4695 fill_cmd(action, O_EXTERNAL_DATA, 0, (uint16_t)mss); 4696 av++; 4697 break; 4698 } 4699 4700 default: 4701 av--; 4702 if (match_token(rule_eactions, *av) == -1) 4703 errx(EX_DATAERR, "invalid action %s\n", *av); 4704 /* 4705 * External actions support. 4706 * XXX: we support only syntax with instance name. 4707 * For known external actions (from rule_eactions list) 4708 * we can handle syntax directly. But with `eaction' 4709 * keyword we can use only `eaction <name> <instance>' 4710 * syntax. 4711 */ 4712 case TOK_EACTION: { 4713 uint32_t idx; 4714 4715 NEED1("Missing eaction name"); 4716 if (eaction_check_name(*av) != 0) 4717 errx(EX_DATAERR, "Invalid eaction name %s", *av); 4718 idx = pack_object(tstate, *av, IPFW_TLV_EACTION); 4719 if (idx == 0) 4720 errx(EX_DATAERR, "pack_object failed"); 4721 action->opcode = O_EXTERNAL_ACTION; 4722 action->len = F_INSN_SIZE(ipfw_insn_kidx); 4723 CHECK_ACTLEN; 4724 insntod(action, kidx)->kidx = idx; 4725 4726 av++; 4727 NEED1("Missing eaction instance name"); 4728 if (eaction_check_name(*av) != 0) 4729 errx(EX_DATAERR, "Invalid eaction instance name %s", 4730 *av); 4731 /* 4732 * External action instance object has TLV type depended 4733 * from the external action name object index. Since we 4734 * currently don't know this index, use zero as TLV type. 4735 */ 4736 idx = pack_object(tstate, *av, 0); 4737 if (idx == 0) 4738 errx(EX_DATAERR, "pack_object failed"); 4739 action = next_cmd(action, &ablen); 4740 action->opcode = O_EXTERNAL_INSTANCE; 4741 action->len = F_INSN_SIZE(ipfw_insn_kidx); 4742 CHECK_ACTLEN; 4743 insntod(action, kidx)->kidx = idx; 4744 av++; 4745 } 4746 } 4747 action = next_cmd(action, &ablen); 4748 4749 /* 4750 * [altq queuename] -- altq tag, optional 4751 * [log [logamount N]] -- log, optional 4752 * 4753 * If they exist, it go first in the cmdbuf, but then it is 4754 * skipped in the copy section to the end of the buffer. 4755 */ 4756 while (av[0] != NULL && (i = match_token(rule_action_params, *av)) != -1) { 4757 av++; 4758 switch (i) { 4759 case TOK_LOG: 4760 { 4761 ipfw_insn_log *c = (ipfw_insn_log *)cmd; 4762 int l; 4763 4764 if (have_log) 4765 errx(EX_DATAERR, 4766 "log cannot be specified more than once"); 4767 have_log = (ipfw_insn *)c; 4768 cmd->len = F_INSN_SIZE(ipfw_insn_log); 4769 CHECK_CMDLEN; 4770 cmd->opcode = O_LOG; 4771 cmd->arg1 = IPFW_LOG_DEFAULT; 4772 /* logdst before logamount */ 4773 if (av[0] && _substrcmp(*av, "logdst") == 0) { 4774 av++; 4775 NEED1("logdst requires argument"); 4776 cmd->arg1 = parse_logdst(*av); 4777 av++; 4778 } 4779 4780 if (av[0] && _substrcmp(*av, "logamount") == 0) { 4781 av++; 4782 NEED1("logamount requires argument"); 4783 l = atoi(*av); 4784 if (l < 0) 4785 errx(EX_DATAERR, 4786 "logamount must be positive"); 4787 c->max_log = l; 4788 av++; 4789 } else { 4790 len = sizeof(c->max_log); 4791 if (sysctlbyname("net.inet.ip.fw.verbose_limit", 4792 &c->max_log, &len, NULL, 0) == -1) { 4793 if (g_co.test_only) { 4794 c->max_log = 0; 4795 break; 4796 } 4797 errx(1, "sysctlbyname(\"%s\")", 4798 "net.inet.ip.fw.verbose_limit"); 4799 } 4800 } 4801 4802 /* logdst after logamount */ 4803 if (av[0] && _substrcmp(*av, "logdst") == 0) { 4804 av++; 4805 NEED1("logdst requires argument"); 4806 cmd->arg1 = parse_logdst(*av); 4807 av++; 4808 } 4809 } 4810 break; 4811 4812 #ifndef NO_ALTQ 4813 case TOK_ALTQ: 4814 { 4815 ipfw_insn_altq *a = (ipfw_insn_altq *)cmd; 4816 4817 NEED1("missing altq queue name"); 4818 if (have_altq) 4819 errx(EX_DATAERR, 4820 "altq cannot be specified more than once"); 4821 have_altq = (ipfw_insn *)a; 4822 cmd->len = F_INSN_SIZE(ipfw_insn_altq); 4823 CHECK_CMDLEN; 4824 cmd->opcode = O_ALTQ; 4825 a->qid = altq_name_to_qid(*av); 4826 av++; 4827 } 4828 break; 4829 #endif 4830 4831 case TOK_TAG: 4832 case TOK_UNTAG: { 4833 uint16_t tag; 4834 4835 if (have_tag) 4836 errx(EX_USAGE, "tag and untag cannot be " 4837 "specified more than once"); 4838 GET_UINT_ARG(tag, IPFW_ARG_MIN, IPFW_ARG_MAX, i, 4839 rule_action_params); 4840 have_tag = cmd; 4841 fill_cmd(cmd, O_TAG, (i == TOK_TAG) ? 0: F_NOT, tag); 4842 av++; 4843 break; 4844 } 4845 4846 default: 4847 abort(); 4848 } 4849 cmd = next_cmd(cmd, &cblen); 4850 } 4851 4852 if (have_state) { /* must be a check-state, we are done */ 4853 if (*av != NULL && 4854 match_token(rule_options, *av) == TOK_COMMENT) { 4855 /* check-state has a comment */ 4856 av++; 4857 fill_comment(cmd, av, cblen); 4858 cmd = next_cmd(cmd, &cblen); 4859 av[0] = NULL; 4860 } 4861 goto done; 4862 } 4863 4864 #define OR_START(target) \ 4865 if (av[0] && (*av[0] == '(' || *av[0] == '{')) { \ 4866 if (open_par) \ 4867 errx(EX_USAGE, "nested \"(\" not allowed\n"); \ 4868 prev = NULL; \ 4869 open_par = 1; \ 4870 if ( (av[0])[1] == '\0') { \ 4871 av++; \ 4872 } else \ 4873 (*av)++; \ 4874 } \ 4875 target: \ 4876 4877 4878 #define CLOSE_PAR \ 4879 if (open_par) { \ 4880 if (av[0] && ( \ 4881 strcmp(*av, ")") == 0 || \ 4882 strcmp(*av, "}") == 0)) { \ 4883 prev = NULL; \ 4884 open_par = 0; \ 4885 av++; \ 4886 } else \ 4887 errx(EX_USAGE, "missing \")\"\n"); \ 4888 } 4889 4890 #define NOT_BLOCK \ 4891 if (av[0] && _substrcmp(*av, "not") == 0) { \ 4892 if (cmd->len & F_NOT) \ 4893 errx(EX_USAGE, "double \"not\" not allowed\n"); \ 4894 cmd->len |= F_NOT; \ 4895 av++; \ 4896 } 4897 4898 #define OR_BLOCK(target) \ 4899 if (av[0] && _substrcmp(*av, "or") == 0) { \ 4900 if (prev == NULL || open_par == 0) \ 4901 errx(EX_DATAERR, "invalid OR block"); \ 4902 prev->len |= F_OR; \ 4903 av++; \ 4904 goto target; \ 4905 } \ 4906 CLOSE_PAR; 4907 4908 first_cmd = cmd; 4909 4910 #if 0 4911 /* 4912 * MAC addresses, optional. 4913 * If we have this, we skip the part "proto from src to dst" 4914 * and jump straight to the option parsing. 4915 */ 4916 NOT_BLOCK; 4917 NEED1("missing protocol"); 4918 if (_substrcmp(*av, "MAC") == 0 || 4919 _substrcmp(*av, "mac") == 0) { 4920 av++; /* the "MAC" keyword */ 4921 add_mac(cmd, av); /* exits in case of errors */ 4922 cmd = next_cmd(cmd); 4923 av += 2; /* dst-mac and src-mac */ 4924 NOT_BLOCK; 4925 NEED1("missing mac type"); 4926 if (add_mactype(cmd, av[0])) 4927 cmd = next_cmd(cmd); 4928 av++; /* any or mac-type */ 4929 goto read_options; 4930 } 4931 #endif 4932 4933 /* 4934 * protocol, mandatory 4935 */ 4936 OR_START(get_proto); 4937 NOT_BLOCK; 4938 NEED1("missing protocol"); 4939 if (add_proto_compat(cmd, *av, &proto)) { 4940 av++; 4941 if (F_LEN(cmd) != 0) { 4942 prev = cmd; 4943 cmd = next_cmd(cmd, &cblen); 4944 } 4945 } else if (first_cmd != cmd) { 4946 errx(EX_DATAERR, "invalid protocol ``%s''", *av); 4947 } else { 4948 rule->flags |= IPFW_RULE_JUSTOPTS; 4949 goto read_options; 4950 } 4951 OR_BLOCK(get_proto); 4952 4953 first_cmd = cmd; /* update pointer to use in compact form */ 4954 4955 /* 4956 * "from", mandatory 4957 */ 4958 if ((av[0] == NULL) || _substrcmp(*av, "from") != 0) 4959 errx(EX_USAGE, "missing ``from''"); 4960 av++; 4961 4962 /* 4963 * source IP, mandatory 4964 */ 4965 OR_START(source_ip); 4966 NOT_BLOCK; /* optional "not" */ 4967 NEED1("missing source address"); 4968 if (add_src(cmd, *av, proto, cblen, tstate)) { 4969 av++; 4970 if (F_LEN(cmd) != 0) { /* ! any */ 4971 prev = cmd; 4972 cmd = next_cmd(cmd, &cblen); 4973 } 4974 } else 4975 errx(EX_USAGE, "bad source address %s", *av); 4976 OR_BLOCK(source_ip); 4977 4978 /* 4979 * source ports, optional 4980 */ 4981 NOT_BLOCK; /* optional "not" */ 4982 if ( av[0] != NULL ) { 4983 if (_substrcmp(*av, "any") == 0 || 4984 add_ports(cmd, *av, proto, O_IP_SRCPORT, cblen)) { 4985 av++; 4986 if (F_LEN(cmd) != 0) 4987 cmd = next_cmd(cmd, &cblen); 4988 } 4989 } 4990 4991 /* 4992 * "to", mandatory 4993 */ 4994 if ( (av[0] == NULL) || _substrcmp(*av, "to") != 0 ) 4995 errx(EX_USAGE, "missing ``to''"); 4996 av++; 4997 4998 /* 4999 * destination, mandatory 5000 */ 5001 OR_START(dest_ip); 5002 NOT_BLOCK; /* optional "not" */ 5003 NEED1("missing dst address"); 5004 if (add_dst(cmd, *av, proto, cblen, tstate)) { 5005 av++; 5006 if (F_LEN(cmd) != 0) { /* ! any */ 5007 prev = cmd; 5008 cmd = next_cmd(cmd, &cblen); 5009 } 5010 } else 5011 errx( EX_USAGE, "bad destination address %s", *av); 5012 OR_BLOCK(dest_ip); 5013 5014 /* 5015 * dest. ports, optional 5016 */ 5017 NOT_BLOCK; /* optional "not" */ 5018 if (av[0]) { 5019 if (_substrcmp(*av, "any") == 0 || 5020 add_ports(cmd, *av, proto, O_IP_DSTPORT, cblen)) { 5021 av++; 5022 if (F_LEN(cmd) != 0) 5023 cmd = next_cmd(cmd, &cblen); 5024 } 5025 } 5026 if (first_cmd == cmd) 5027 rule->flags |= IPFW_RULE_NOOPT; 5028 5029 read_options: 5030 prev = NULL; 5031 while ( av[0] != NULL ) { 5032 char *s; 5033 ipfw_insn_u32 *cmd32; /* alias for cmd */ 5034 5035 s = *av; 5036 cmd32 = (ipfw_insn_u32 *)cmd; 5037 5038 if (*s == '!') { /* alternate syntax for NOT */ 5039 if (cmd->len & F_NOT) 5040 errx(EX_USAGE, "double \"not\" not allowed\n"); 5041 cmd->len = F_NOT; 5042 s++; 5043 } 5044 i = match_token(rule_options, s); 5045 av++; 5046 switch(i) { 5047 case TOK_NOT: 5048 if (cmd->len & F_NOT) 5049 errx(EX_USAGE, "double \"not\" not allowed\n"); 5050 cmd->len = F_NOT; 5051 break; 5052 5053 case TOK_OR: 5054 if (open_par == 0 || prev == NULL) 5055 errx(EX_USAGE, "invalid \"or\" block\n"); 5056 prev->len |= F_OR; 5057 break; 5058 5059 case TOK_STARTBRACE: 5060 if (open_par) 5061 errx(EX_USAGE, "+nested \"(\" not allowed\n"); 5062 open_par = 1; 5063 break; 5064 5065 case TOK_ENDBRACE: 5066 if (!open_par) 5067 errx(EX_USAGE, "+missing \")\"\n"); 5068 open_par = 0; 5069 prev = NULL; 5070 break; 5071 5072 case TOK_IN: 5073 fill_cmd(cmd, O_IN, 0, 0); 5074 break; 5075 5076 case TOK_OUT: 5077 cmd->len ^= F_NOT; /* toggle F_NOT */ 5078 fill_cmd(cmd, O_IN, 0, 0); 5079 break; 5080 5081 case TOK_DIVERTED: 5082 fill_cmd(cmd, O_DIVERTED, 0, 3); 5083 break; 5084 5085 case TOK_DIVERTEDLOOPBACK: 5086 fill_cmd(cmd, O_DIVERTED, 0, 1); 5087 break; 5088 5089 case TOK_DIVERTEDOUTPUT: 5090 fill_cmd(cmd, O_DIVERTED, 0, 2); 5091 break; 5092 5093 case TOK_FRAG: { 5094 uint32_t set = 0, clear = 0; 5095 5096 if (*av != NULL && fill_flags(f_ipoff, *av, NULL, 5097 &set, &clear) == 0) 5098 av++; 5099 else { 5100 /* 5101 * Compatibility: no argument after "frag" 5102 * keyword equals to "frag offset". 5103 */ 5104 set = 0x01; 5105 clear = 0; 5106 } 5107 fill_cmd(cmd, O_FRAG, 0, 5108 (set & 0xff) | ( (clear & 0xff) << 8)); 5109 break; 5110 } 5111 5112 case TOK_LAYER2: 5113 fill_cmd(cmd, O_LAYER2, 0, 0); 5114 break; 5115 5116 case TOK_XMIT: 5117 case TOK_RECV: 5118 case TOK_VIA: 5119 NEED1("recv, xmit, via require interface name" 5120 " or address"); 5121 fill_iface(insntod(cmd, if), av[0], cblen, tstate); 5122 av++; 5123 if (F_LEN(cmd) == 0) /* not a valid address */ 5124 break; 5125 if (i == TOK_XMIT) 5126 cmd->opcode = O_XMIT; 5127 else if (i == TOK_RECV) 5128 cmd->opcode = O_RECV; 5129 else if (i == TOK_VIA) 5130 cmd->opcode = O_VIA; 5131 break; 5132 5133 case TOK_ICMPTYPES: 5134 NEED1("icmptypes requires list of types"); 5135 fill_icmptypes((ipfw_insn_u32 *)cmd, *av); 5136 av++; 5137 break; 5138 5139 case TOK_ICMP6TYPES: 5140 NEED1("icmptypes requires list of types"); 5141 fill_icmp6types((ipfw_insn_icmp6 *)cmd, *av, cblen); 5142 av++; 5143 break; 5144 5145 case TOK_IPTTL: 5146 NEED1("ipttl requires TTL"); 5147 if (strpbrk(*av, "-,")) { 5148 if (!add_ports(cmd, *av, 0, O_IPTTL, cblen)) 5149 errx(EX_DATAERR, "invalid ipttl %s", *av); 5150 } else 5151 fill_cmd(cmd, O_IPTTL, 0, strtoul(*av, NULL, 0)); 5152 av++; 5153 break; 5154 5155 case TOK_IPID: 5156 NEED1("ipid requires id"); 5157 if (strpbrk(*av, "-,")) { 5158 if (!add_ports(cmd, *av, 0, O_IPID, cblen)) 5159 errx(EX_DATAERR, "invalid ipid %s", *av); 5160 } else 5161 fill_cmd(cmd, O_IPID, 0, strtoul(*av, NULL, 0)); 5162 av++; 5163 break; 5164 5165 case TOK_IPLEN: 5166 NEED1("iplen requires length"); 5167 if (strpbrk(*av, "-,")) { 5168 if (!add_ports(cmd, *av, 0, O_IPLEN, cblen)) 5169 errx(EX_DATAERR, "invalid ip len %s", *av); 5170 } else 5171 fill_cmd(cmd, O_IPLEN, 0, strtoul(*av, NULL, 0)); 5172 av++; 5173 break; 5174 5175 case TOK_IPVER: 5176 NEED1("ipver requires version"); 5177 fill_cmd(cmd, O_IPVER, 0, strtoul(*av, NULL, 0)); 5178 av++; 5179 break; 5180 5181 case TOK_IPPRECEDENCE: 5182 NEED1("ipprecedence requires value"); 5183 fill_cmd(cmd, O_IPPRECEDENCE, 0, 5184 (strtoul(*av, NULL, 0) & 7) << 5); 5185 av++; 5186 break; 5187 5188 case TOK_DSCP: 5189 NEED1("missing DSCP code"); 5190 fill_dscp(cmd, *av, cblen); 5191 av++; 5192 break; 5193 5194 case TOK_IPOPTS: 5195 NEED1("missing argument for ipoptions"); 5196 fill_flags_cmd(cmd, O_IPOPT, f_ipopts, *av); 5197 av++; 5198 break; 5199 5200 case TOK_IPTOS: 5201 NEED1("missing argument for iptos"); 5202 fill_flags_cmd(cmd, O_IPTOS, f_iptos, *av); 5203 av++; 5204 break; 5205 5206 case TOK_UID: 5207 NEED1("uid requires argument"); 5208 { 5209 char *end; 5210 uid_t uid; 5211 struct passwd *pwd; 5212 5213 cmd->opcode = O_UID; 5214 uid = strtoul(*av, &end, 0); 5215 pwd = (*end == '\0') ? getpwuid(uid) : getpwnam(*av); 5216 if (pwd == NULL) 5217 errx(EX_DATAERR, "uid \"%s\" nonexistent", *av); 5218 cmd32->d[0] = pwd->pw_uid; 5219 cmd->len |= F_INSN_SIZE(ipfw_insn_u32); 5220 av++; 5221 } 5222 break; 5223 5224 case TOK_GID: 5225 NEED1("gid requires argument"); 5226 { 5227 char *end; 5228 gid_t gid; 5229 struct group *grp; 5230 5231 cmd->opcode = O_GID; 5232 gid = strtoul(*av, &end, 0); 5233 grp = (*end == '\0') ? getgrgid(gid) : getgrnam(*av); 5234 if (grp == NULL) 5235 errx(EX_DATAERR, "gid \"%s\" nonexistent", *av); 5236 cmd32->d[0] = grp->gr_gid; 5237 cmd->len |= F_INSN_SIZE(ipfw_insn_u32); 5238 av++; 5239 } 5240 break; 5241 5242 case TOK_JAIL: 5243 NEED1("jail requires argument"); 5244 { 5245 char *end; 5246 int jid; 5247 5248 cmd->opcode = O_JAIL; 5249 /* 5250 * If av is a number, then we'll just pass it as-is. If 5251 * it's a name, try to resolve that to a jid. 5252 * 5253 * We save the jail_getid(3) call for a fallback because 5254 * it entails an unconditional trip to the kernel to 5255 * either validate a jid or resolve a name to a jid. 5256 * This specific token doesn't currently require a 5257 * jid to be an active jail, so we save a transition 5258 * by simply using a number that we're given. 5259 */ 5260 jid = strtoul(*av, &end, 10); 5261 if (*end != '\0') { 5262 jid = jail_getid(*av); 5263 if (jid < 0) 5264 errx(EX_DATAERR, "%s", jail_errmsg); 5265 } 5266 cmd32->d[0] = (uint32_t)jid; 5267 cmd->len |= F_INSN_SIZE(ipfw_insn_u32); 5268 av++; 5269 } 5270 break; 5271 5272 case TOK_ESTAB: 5273 fill_cmd(cmd, O_ESTAB, 0, 0); 5274 break; 5275 5276 case TOK_SETUP: 5277 fill_cmd(cmd, O_TCPFLAGS, 0, 5278 (TH_SYN) | ( (TH_ACK) & 0xff) <<8 ); 5279 break; 5280 5281 case TOK_TCPDATALEN: 5282 NEED1("tcpdatalen requires length"); 5283 if (strpbrk(*av, "-,")) { 5284 if (!add_ports(cmd, *av, 0, O_TCPDATALEN, cblen)) 5285 errx(EX_DATAERR, "invalid tcpdata len %s", *av); 5286 } else 5287 fill_cmd(cmd, O_TCPDATALEN, 0, 5288 strtoul(*av, NULL, 0)); 5289 av++; 5290 break; 5291 5292 case TOK_TCPOPTS: 5293 NEED1("missing argument for tcpoptions"); 5294 fill_flags_cmd(cmd, O_TCPOPTS, f_tcpopts, *av); 5295 av++; 5296 break; 5297 5298 case TOK_TCPSEQ: 5299 case TOK_TCPACK: 5300 NEED1("tcpseq/tcpack requires argument"); 5301 cmd->len = F_INSN_SIZE(ipfw_insn_u32); 5302 cmd->opcode = (i == TOK_TCPSEQ) ? O_TCPSEQ : O_TCPACK; 5303 cmd32->d[0] = htonl(strtoul(*av, NULL, 0)); 5304 av++; 5305 break; 5306 5307 case TOK_TCPMSS: 5308 case TOK_TCPWIN: 5309 NEED1("tcpmss/tcpwin requires size"); 5310 if (strpbrk(*av, "-,")) { 5311 if (add_ports(cmd, *av, 0, 5312 i == TOK_TCPWIN ? O_TCPWIN : O_TCPMSS, 5313 cblen) == NULL) 5314 errx(EX_DATAERR, "invalid %s size %s", 5315 s, *av); 5316 } else 5317 fill_cmd(cmd, i == TOK_TCPWIN ? O_TCPWIN : 5318 O_TCPMSS, 0, strtoul(*av, NULL, 0)); 5319 av++; 5320 break; 5321 5322 case TOK_TCPFLAGS: 5323 NEED1("missing argument for tcpflags"); 5324 cmd->opcode = O_TCPFLAGS; 5325 fill_flags_cmd(cmd, O_TCPFLAGS, f_tcpflags, *av); 5326 av++; 5327 break; 5328 5329 case TOK_KEEPSTATE: 5330 case TOK_RECORDSTATE: { 5331 uint32_t uidx; 5332 5333 if (open_par) 5334 errx(EX_USAGE, "keep-state or record-state cannot be part " 5335 "of an or block"); 5336 if (have_state) 5337 errx(EX_USAGE, "only one of keep-state, record-state, " 5338 " limit and set-limit is allowed"); 5339 if (*av != NULL && *av[0] == ':') { 5340 if (state_check_name(*av + 1) != 0) 5341 errx(EX_DATAERR, 5342 "Invalid state name %s", *av); 5343 uidx = pack_object(tstate, *av + 1, 5344 IPFW_TLV_STATE_NAME); 5345 av++; 5346 } else 5347 uidx = pack_object(tstate, default_state_name, 5348 IPFW_TLV_STATE_NAME); 5349 have_state = cmd; 5350 have_rstate = i == TOK_RECORDSTATE; 5351 cmd->opcode = O_KEEP_STATE; 5352 cmd->len = F_INSN_SIZE(ipfw_insn_kidx); 5353 CHECK_CMDLEN; 5354 insntod(have_state, kidx)->kidx = uidx; 5355 break; 5356 } 5357 5358 case TOK_LIMIT: 5359 case TOK_SETLIMIT: { 5360 ipfw_insn_limit *c = insntod(cmd, limit); 5361 int val; 5362 5363 if (open_par) 5364 errx(EX_USAGE, 5365 "limit or set-limit cannot be part of an or block"); 5366 if (have_state) 5367 errx(EX_USAGE, "only one of keep-state, record-state, " 5368 " limit and set-limit is allowed"); 5369 have_state = cmd; 5370 have_rstate = i == TOK_SETLIMIT; 5371 5372 cmd->opcode = O_LIMIT; 5373 cmd->len = F_INSN_SIZE(ipfw_insn_limit); 5374 CHECK_CMDLEN; 5375 c->limit_mask = c->conn_limit = c->kidx = 0; 5376 5377 while ( av[0] != NULL ) { 5378 if ((val = match_token(limit_masks, *av)) <= 0) 5379 break; 5380 c->limit_mask |= val; 5381 av++; 5382 } 5383 5384 if (c->limit_mask == 0) 5385 errx(EX_USAGE, "limit: missing limit mask"); 5386 5387 GET_UINT_ARG(c->conn_limit, IPFW_ARG_MIN, IPFW_ARG_MAX, 5388 TOK_LIMIT, rule_options); 5389 av++; 5390 5391 if (*av != NULL && *av[0] == ':') { 5392 if (state_check_name(*av + 1) != 0) 5393 errx(EX_DATAERR, 5394 "Invalid state name %s", *av); 5395 c->kidx = pack_object(tstate, *av + 1, 5396 IPFW_TLV_STATE_NAME); 5397 av++; 5398 } else 5399 c->kidx = pack_object(tstate, 5400 default_state_name, IPFW_TLV_STATE_NAME); 5401 break; 5402 } 5403 5404 case TOK_PROTO: 5405 NEED1("missing protocol"); 5406 if (add_proto(cmd, *av, &proto)) { 5407 av++; 5408 } else 5409 errx(EX_DATAERR, "invalid protocol ``%s''", 5410 *av); 5411 break; 5412 5413 case TOK_SRCIP: 5414 NEED1("missing source IP"); 5415 if (add_srcip(cmd, *av, cblen, tstate)) { 5416 av++; 5417 } 5418 break; 5419 5420 case TOK_DSTIP: 5421 NEED1("missing destination IP"); 5422 if (add_dstip(cmd, *av, cblen, tstate)) { 5423 av++; 5424 } 5425 break; 5426 5427 case TOK_SRCIP6: 5428 NEED1("missing source IP6"); 5429 if (add_srcip6(cmd, *av, cblen, tstate)) { 5430 av++; 5431 } 5432 break; 5433 5434 case TOK_DSTIP6: 5435 NEED1("missing destination IP6"); 5436 if (add_dstip6(cmd, *av, cblen, tstate)) { 5437 av++; 5438 } 5439 break; 5440 5441 5442 case TOK_SRCMAC: 5443 NEED1("missing source MAC"); 5444 if (add_srcmac(cmd, *av, tstate)) { 5445 av++; 5446 } 5447 break; 5448 5449 case TOK_DSTMAC: 5450 NEED1("missing destination MAC"); 5451 if (add_dstmac(cmd, *av, tstate)) { 5452 av++; 5453 } 5454 break; 5455 5456 case TOK_SRCPORT: 5457 NEED1("missing source port"); 5458 if (_substrcmp(*av, "any") == 0 || 5459 add_ports(cmd, *av, proto, O_IP_SRCPORT, cblen)) { 5460 av++; 5461 } else 5462 errx(EX_DATAERR, "invalid source port %s", *av); 5463 break; 5464 5465 case TOK_DSTPORT: 5466 NEED1("missing destination port"); 5467 if (_substrcmp(*av, "any") == 0 || 5468 add_ports(cmd, *av, proto, O_IP_DSTPORT, cblen)) { 5469 av++; 5470 } else 5471 errx(EX_DATAERR, "invalid destination port %s", 5472 *av); 5473 break; 5474 5475 case TOK_MAC: 5476 if (add_mac(cmd, av, cblen)) 5477 av += 2; 5478 break; 5479 5480 case TOK_MACTYPE: 5481 NEED1("missing mac type"); 5482 if (!add_mactype(cmd, *av, cblen)) 5483 errx(EX_DATAERR, "invalid mac type %s", *av); 5484 av++; 5485 break; 5486 5487 case TOK_VERREVPATH: 5488 fill_cmd(cmd, O_VERREVPATH, 0, 0); 5489 break; 5490 5491 case TOK_VERSRCREACH: 5492 fill_cmd(cmd, O_VERSRCREACH, 0, 0); 5493 break; 5494 5495 case TOK_ANTISPOOF: 5496 fill_cmd(cmd, O_ANTISPOOF, 0, 0); 5497 break; 5498 5499 case TOK_IPSEC: 5500 fill_cmd(cmd, O_IPSEC, 0, 0); 5501 break; 5502 5503 case TOK_IPV6: 5504 fill_cmd(cmd, O_IP6, 0, 0); 5505 break; 5506 5507 case TOK_IPV4: 5508 fill_cmd(cmd, O_IP4, 0, 0); 5509 break; 5510 5511 case TOK_EXT6HDR: 5512 NEED1("missing extension header"); 5513 fill_ext6hdr( cmd, *av ); 5514 av++; 5515 break; 5516 5517 case TOK_FLOWID: 5518 if (proto != IPPROTO_IPV6 ) 5519 errx( EX_USAGE, "flow-id filter is active " 5520 "only for ipv6 protocol\n"); 5521 fill_flow6( (ipfw_insn_u32 *) cmd, *av, cblen); 5522 av++; 5523 break; 5524 5525 case TOK_COMMENT: 5526 fill_comment(cmd, av, cblen); 5527 av[0]=NULL; 5528 break; 5529 5530 case TOK_TAGGED: 5531 if (av[0] && strpbrk(*av, "-,")) { 5532 if (!add_ports(cmd, *av, 0, O_TAGGED, cblen)) 5533 errx(EX_DATAERR, "tagged: invalid tag" 5534 " list: %s", *av); 5535 } 5536 else { 5537 uint16_t tag; 5538 5539 GET_UINT_ARG(tag, IPFW_ARG_MIN, IPFW_ARG_MAX, 5540 TOK_TAGGED, rule_options); 5541 fill_cmd(cmd, O_TAGGED, 0, tag); 5542 } 5543 av++; 5544 break; 5545 5546 case TOK_FIB: 5547 NEED1("fib requires fib number"); 5548 fill_cmd(cmd, O_FIB, 0, strtoul(*av, NULL, 0)); 5549 av++; 5550 break; 5551 case TOK_SOCKARG: 5552 fill_cmd(cmd, O_SOCKARG, 0, 0); 5553 break; 5554 5555 case TOK_LOOKUP: { 5556 /* optional mask for some LOOKUP types */ 5557 ipfw_insn_lookup *c = insntod(cmd, lookup); 5558 char *lkey; 5559 5560 if (!av[0] || !av[1]) 5561 errx(EX_USAGE, 5562 "format: lookup argument tablenum"); 5563 cmd->opcode = O_TABLE_LOOKUP; 5564 5565 lkey = strsep(av, ":"); 5566 i = match_token(lookup_keys, lkey); 5567 if (i == -1) 5568 errx(EX_USAGE, 5569 "format: cannot lookup on %s", lkey); 5570 /* masked lookup key */ 5571 if (*av != NULL) { 5572 switch (i) { 5573 case LOOKUP_DST_PORT: 5574 case LOOKUP_SRC_PORT: 5575 case LOOKUP_UID: 5576 case LOOKUP_JAIL: 5577 case LOOKUP_DSCP: 5578 case LOOKUP_MARK: 5579 case LOOKUP_RULENUM: 5580 case LOOKUP_SRC_MAC: 5581 case LOOKUP_DST_MAC: 5582 case LOOKUP_SRC_IP6: 5583 case LOOKUP_DST_IP6: 5584 case LOOKUP_SRC_IP4: 5585 case LOOKUP_DST_IP4: 5586 break; 5587 default: 5588 errx(EX_USAGE, 5589 "masked lookup is not supported " 5590 "for %s", lkey); 5591 } 5592 cmd->len |= F_INSN_SIZE(ipfw_insn_lookup); 5593 IPFW_SET_LOOKUP_MASKING(cmd, 1); 5594 get_lookup_bitmask(i, c, *av); 5595 } else { 5596 cmd->len |= F_INSN_SIZE(ipfw_insn_kidx); 5597 } 5598 CHECK_CMDLEN; 5599 5600 IPFW_SET_LOOKUP_TYPE(cmd, i); 5601 av++; 5602 c->kidx = pack_table(tstate, *av); 5603 if (c->kidx == 0) 5604 errx(EX_DATAERR, 5605 "Invalid table name: %s", *av); 5606 av++; 5607 } 5608 break; 5609 case TOK_FLOW: 5610 NEED1("missing table name"); 5611 if (strncmp(*av, "table(", 6) != 0) 5612 errx(EX_DATAERR, 5613 "enclose table name into \"table()\""); 5614 fill_table(cmd, *av, O_IP_FLOW_LOOKUP, tstate); 5615 av++; 5616 break; 5617 5618 case TOK_SKIPACTION: 5619 if (have_skipcmd) 5620 errx(EX_USAGE, "only one defer-action " 5621 "is allowed"); 5622 have_skipcmd = cmd; 5623 fill_cmd(cmd, O_SKIP_ACTION, 0, 0); 5624 break; 5625 5626 case TOK_MARK: 5627 NEED1("missing mark value:mask"); 5628 fill_mark(cmd, *av, cblen); 5629 av++; 5630 break; 5631 5632 default: 5633 errx(EX_USAGE, "unrecognised option [%d] %s\n", i, s); 5634 } 5635 if (F_LEN(cmd) > 0) { /* prepare to advance */ 5636 prev = cmd; 5637 cmd = next_cmd(cmd, &cblen); 5638 } 5639 } 5640 5641 done: 5642 5643 if (!have_state && have_skipcmd) 5644 warnx("Rule contains \"defer-immediate-action\" " 5645 "and doesn't contain any state-related options."); 5646 5647 /* 5648 * Now copy stuff into the rule. 5649 * If we have a keep-state option, the first instruction 5650 * must be a PROBE_STATE (which is generated here). 5651 * If we have a LOG option, it was stored as the first command, 5652 * and now must be moved to the top of the action part. 5653 */ 5654 dst = (ipfw_insn *)rule->cmd; 5655 5656 /* 5657 * First thing to write into the command stream is the match probability. 5658 */ 5659 if (match_prob != 1) { /* 1 means always match */ 5660 dst->opcode = O_PROB; 5661 dst->len = 2; 5662 *((int32_t *)(dst+1)) = (int32_t)(match_prob * 0x7fffffff); 5663 dst += dst->len; 5664 } 5665 5666 /* 5667 * generate O_PROBE_STATE if necessary 5668 */ 5669 if (have_state && have_state->opcode != O_CHECK_STATE && !have_rstate) { 5670 dst->opcode = O_PROBE_STATE; 5671 dst->len = F_INSN_SIZE(ipfw_insn_kidx); 5672 insntod(dst, kidx)->kidx = insntod(have_state, kidx)->kidx; 5673 dst = next_cmd(dst, &rblen); 5674 } 5675 5676 /* 5677 * copy all commands but O_LOG, O_KEEP_STATE, O_LIMIT, O_ALTQ, O_TAG, 5678 * O_SKIP_ACTION 5679 */ 5680 for (src = (ipfw_insn *)cmdbuf; src != cmd; src += i) { 5681 i = F_LEN(src); 5682 CHECK_RBUFLEN(i); 5683 5684 switch (src->opcode) { 5685 case O_LOG: 5686 case O_KEEP_STATE: 5687 case O_LIMIT: 5688 case O_ALTQ: 5689 case O_TAG: 5690 case O_SKIP_ACTION: 5691 break; 5692 default: 5693 bcopy(src, dst, i * sizeof(uint32_t)); 5694 dst += i; 5695 } 5696 } 5697 5698 /* 5699 * put back the have_state command as last opcode 5700 */ 5701 if (have_state && have_state->opcode != O_CHECK_STATE) { 5702 i = F_LEN(have_state); 5703 CHECK_RBUFLEN(i); 5704 bcopy(have_state, dst, i * sizeof(uint32_t)); 5705 dst += i; 5706 } 5707 5708 /* 5709 * put back the have_skipcmd command as very last opcode 5710 */ 5711 if (have_skipcmd) { 5712 i = F_LEN(have_skipcmd); 5713 CHECK_RBUFLEN(i); 5714 bcopy(have_skipcmd, dst, i * sizeof(uint32_t)); 5715 dst += i; 5716 } 5717 5718 /* 5719 * start action section 5720 */ 5721 rule->act_ofs = dst - rule->cmd; 5722 5723 /* put back O_LOG, O_ALTQ, O_TAG if necessary */ 5724 if (have_log) { 5725 i = F_LEN(have_log); 5726 CHECK_RBUFLEN(i); 5727 bcopy(have_log, dst, i * sizeof(uint32_t)); 5728 dst += i; 5729 } 5730 if (have_altq) { 5731 i = F_LEN(have_altq); 5732 CHECK_RBUFLEN(i); 5733 bcopy(have_altq, dst, i * sizeof(uint32_t)); 5734 dst += i; 5735 } 5736 if (have_tag) { 5737 i = F_LEN(have_tag); 5738 CHECK_RBUFLEN(i); 5739 bcopy(have_tag, dst, i * sizeof(uint32_t)); 5740 dst += i; 5741 } 5742 5743 /* 5744 * copy all other actions 5745 */ 5746 for (src = (ipfw_insn *)actbuf; src != action; src += i) { 5747 i = F_LEN(src); 5748 CHECK_RBUFLEN(i); 5749 bcopy(src, dst, i * sizeof(uint32_t)); 5750 dst += i; 5751 } 5752 5753 rule->cmd_len = (uint32_t *)dst - (uint32_t *)(rule->cmd); 5754 *rbufsize = (char *)dst - (char *)rule; 5755 } 5756 5757 static int 5758 compare_ntlv(const void *_a, const void *_b) 5759 { 5760 const ipfw_obj_ntlv *a, *b; 5761 5762 a = (const ipfw_obj_ntlv *)_a; 5763 b = (const ipfw_obj_ntlv *)_b; 5764 5765 if (a->set < b->set) 5766 return (-1); 5767 else if (a->set > b->set) 5768 return (1); 5769 5770 if (a->idx < b->idx) 5771 return (-1); 5772 else if (a->idx > b->idx) 5773 return (1); 5774 5775 if (a->head.type < b->head.type) 5776 return (-1); 5777 else if (a->head.type > b->head.type) 5778 return (1); 5779 5780 return (0); 5781 } 5782 5783 /* 5784 * Provide kernel with sorted list of referenced objects 5785 */ 5786 static void 5787 object_sort_ctlv(ipfw_obj_ctlv *ctlv) 5788 { 5789 5790 qsort(ctlv + 1, ctlv->count, ctlv->objsize, compare_ntlv); 5791 } 5792 5793 struct object_kt { 5794 uint32_t uidx; 5795 uint16_t type; 5796 }; 5797 static int 5798 compare_object_kntlv(const void *k, const void *v) 5799 { 5800 const ipfw_obj_ntlv *ntlv; 5801 struct object_kt key; 5802 5803 key = *((const struct object_kt *)k); 5804 ntlv = (const ipfw_obj_ntlv *)v; 5805 5806 if (key.uidx < ntlv->idx) 5807 return (-1); 5808 else if (key.uidx > ntlv->idx) 5809 return (1); 5810 5811 if (key.type < ntlv->head.type) 5812 return (-1); 5813 else if (key.type > ntlv->head.type) 5814 return (1); 5815 5816 return (0); 5817 } 5818 5819 /* 5820 * Finds object name in @ctlv by @idx and @type. 5821 * Uses the following facts: 5822 * 1) All TLVs are the same size 5823 * 2) Kernel implementation provides already sorted list. 5824 * 5825 * Returns table name or NULL. 5826 */ 5827 static char * 5828 object_search_ctlv(ipfw_obj_ctlv *ctlv, uint32_t idx, uint16_t type) 5829 { 5830 ipfw_obj_ntlv *ntlv; 5831 struct object_kt key; 5832 5833 key.uidx = idx; 5834 key.type = type; 5835 5836 ntlv = bsearch(&key, (ctlv + 1), ctlv->count, ctlv->objsize, 5837 compare_object_kntlv); 5838 5839 if (ntlv != NULL) 5840 return (ntlv->name); 5841 5842 return (NULL); 5843 } 5844 5845 static char * 5846 table_search_ctlv(ipfw_obj_ctlv *ctlv, uint32_t idx) 5847 { 5848 5849 return (object_search_ctlv(ctlv, idx, IPFW_TLV_TBL_NAME)); 5850 } 5851 5852 /* 5853 * Adds one or more rules to ipfw chain. 5854 * Data layout: 5855 * Request: 5856 * [ 5857 * ip_fw3_opheader 5858 * [ ipfw_obj_ctlv(IPFW_TLV_TBL_LIST) ipfw_obj_ntlv x N ] (optional *1) 5859 * [ ipfw_obj_ctlv(IPFW_TLV_RULE_LIST) [ ip_fw_rule ip_fw_insn ] x N ] (*2) (*3) 5860 * ] 5861 * Reply: 5862 * [ 5863 * ip_fw3_opheader 5864 * [ ipfw_obj_ctlv(IPFW_TLV_TBL_LIST) ipfw_obj_ntlv x N ] (optional) 5865 * [ ipfw_obj_ctlv(IPFW_TLV_RULE_LIST) [ ip_fw_rule ip_fw_insn ] x N ] 5866 * ] 5867 * 5868 * Rules in reply are modified to store their actual ruleset number. 5869 * 5870 * (*1) TLVs inside IPFW_TLV_TBL_LIST needs to be sorted ascending 5871 * according to their idx field and there has to be no duplicates. 5872 * (*2) Numbered rules inside IPFW_TLV_RULE_LIST needs to be sorted ascending. 5873 * (*3) Each ip_fw structure needs to be aligned to u64 boundary. 5874 */ 5875 void 5876 ipfw_add(char *av[]) 5877 { 5878 uint32_t rulebuf[1024]; 5879 int rbufsize, default_off, tlen, rlen; 5880 size_t sz; 5881 struct tidx ts; 5882 struct ip_fw_rule *rule; 5883 caddr_t tbuf; 5884 ip_fw3_opheader *op3; 5885 ipfw_obj_ctlv *ctlv, *tstate; 5886 5887 rbufsize = sizeof(rulebuf); 5888 memset(rulebuf, 0, rbufsize); 5889 memset(&ts, 0, sizeof(ts)); 5890 5891 /* Optimize case with no tables */ 5892 default_off = sizeof(ipfw_obj_ctlv) + sizeof(ip_fw3_opheader); 5893 op3 = (ip_fw3_opheader *)rulebuf; 5894 ctlv = (ipfw_obj_ctlv *)(op3 + 1); 5895 rule = (struct ip_fw_rule *)(ctlv + 1); 5896 rbufsize -= default_off; 5897 5898 compile_rule(av, (uint32_t *)rule, &rbufsize, &ts); 5899 /* Align rule size to u64 boundary */ 5900 rlen = roundup2(rbufsize, sizeof(uint64_t)); 5901 5902 tbuf = NULL; 5903 sz = 0; 5904 tstate = NULL; 5905 if (ts.count != 0) { 5906 /* Some tables. We have to alloc more data */ 5907 tlen = ts.count * sizeof(ipfw_obj_ntlv); 5908 sz = default_off + sizeof(ipfw_obj_ctlv) + tlen + rlen; 5909 5910 if ((tbuf = calloc(1, sz)) == NULL) 5911 err(EX_UNAVAILABLE, "malloc() failed for IP_FW_XADD"); 5912 op3 = (ip_fw3_opheader *)tbuf; 5913 /* Tables first */ 5914 ctlv = (ipfw_obj_ctlv *)(op3 + 1); 5915 ctlv->head.type = IPFW_TLV_TBLNAME_LIST; 5916 ctlv->head.length = sizeof(ipfw_obj_ctlv) + tlen; 5917 ctlv->count = ts.count; 5918 ctlv->objsize = sizeof(ipfw_obj_ntlv); 5919 memcpy(ctlv + 1, ts.idx, tlen); 5920 object_sort_ctlv(ctlv); 5921 tstate = ctlv; 5922 /* Rule next */ 5923 ctlv = (ipfw_obj_ctlv *)((caddr_t)ctlv + ctlv->head.length); 5924 ctlv->head.type = IPFW_TLV_RULE_LIST; 5925 ctlv->head.length = sizeof(ipfw_obj_ctlv) + rlen; 5926 ctlv->count = 1; 5927 memcpy(ctlv + 1, rule, rbufsize); 5928 } else { 5929 /* Simply add header */ 5930 sz = rlen + default_off; 5931 memset(ctlv, 0, sizeof(*ctlv)); 5932 ctlv->head.type = IPFW_TLV_RULE_LIST; 5933 ctlv->head.length = sizeof(ipfw_obj_ctlv) + rlen; 5934 ctlv->count = 1; 5935 } 5936 5937 if (do_get3(IP_FW_XADD, op3, &sz) != 0) 5938 err(EX_UNAVAILABLE, "getsockopt(%s)", "IP_FW_XADD"); 5939 5940 if (!g_co.do_quiet) { 5941 struct format_opts sfo; 5942 struct buf_pr bp; 5943 memset(&sfo, 0, sizeof(sfo)); 5944 sfo.tstate = tstate; 5945 sfo.set_mask = (uint32_t)(-1); 5946 bp_alloc(&bp, 4096); 5947 show_static_rule(&g_co, &sfo, &bp, rule, NULL); 5948 printf("%s", bp.buf); 5949 bp_free(&bp); 5950 } 5951 5952 if (tbuf != NULL) 5953 free(tbuf); 5954 5955 if (ts.idx != NULL) 5956 free(ts.idx); 5957 } 5958 5959 /* 5960 * clear the counters or the log counters. 5961 * optname has the following values: 5962 * 0 (zero both counters and logging) 5963 * 1 (zero logging only) 5964 */ 5965 void 5966 ipfw_zero(int ac, char *av[], int optname) 5967 { 5968 ipfw_range_tlv rt; 5969 char const *errstr; 5970 char const *name = optname ? "RESETLOG" : "ZERO"; 5971 uint32_t arg; 5972 int failed = EX_OK; 5973 5974 optname = optname ? IP_FW_XRESETLOG : IP_FW_XZERO; 5975 av++; ac--; 5976 5977 if (ac == 0) { 5978 /* clear all entries */ 5979 memset(&rt, 0, sizeof(rt)); 5980 rt.flags = IPFW_RCFLAG_ALL; 5981 if (do_range_cmd(optname, &rt) < 0) 5982 err(EX_UNAVAILABLE, "setsockopt(IP_FW_X%s)", name); 5983 if (!g_co.do_quiet) 5984 printf("%s.\n", optname == IP_FW_XZERO ? 5985 "Accounting cleared":"Logging counts reset"); 5986 5987 return; 5988 } 5989 5990 while (ac) { 5991 /* Rule number */ 5992 if (isdigit(**av)) { 5993 arg = strtonum(*av, 0, 0xffff, &errstr); 5994 if (errstr) 5995 errx(EX_DATAERR, 5996 "invalid rule number %s\n", *av); 5997 memset(&rt, 0, sizeof(rt)); 5998 rt.start_rule = arg; 5999 rt.end_rule = arg; 6000 rt.flags |= IPFW_RCFLAG_RANGE; 6001 if (g_co.use_set != 0) { 6002 rt.set = g_co.use_set - 1; 6003 rt.flags |= IPFW_RCFLAG_SET; 6004 } 6005 if (do_range_cmd(optname, &rt) != 0) { 6006 warn("rule %u: setsockopt(IP_FW_X%s)", 6007 arg, name); 6008 failed = EX_UNAVAILABLE; 6009 } else if (rt.new_set == 0) { 6010 printf("Entry %d not found\n", arg); 6011 failed = EX_UNAVAILABLE; 6012 } else if (!g_co.do_quiet) 6013 printf("Entry %d %s.\n", arg, 6014 optname == IP_FW_XZERO ? 6015 "cleared" : "logging count reset"); 6016 } else { 6017 errx(EX_USAGE, "invalid rule number ``%s''", *av); 6018 } 6019 av++; ac--; 6020 } 6021 if (failed != EX_OK) 6022 exit(failed); 6023 } 6024 6025 void 6026 ipfw_flush(int force) 6027 { 6028 ipfw_range_tlv rt; 6029 6030 if (!force && !g_co.do_quiet) { /* need to ask user */ 6031 int c; 6032 6033 printf("Are you sure? [yn] "); 6034 fflush(stdout); 6035 do { 6036 c = toupper(getc(stdin)); 6037 while (c != '\n' && getc(stdin) != '\n') 6038 if (feof(stdin)) 6039 return; /* and do not flush */ 6040 } while (c != 'Y' && c != 'N'); 6041 printf("\n"); 6042 if (c == 'N') /* user said no */ 6043 return; 6044 } 6045 if (g_co.do_pipe) { 6046 dummynet_flush(); 6047 return; 6048 } 6049 /* `ipfw set N flush` - is the same that `ipfw delete set N` */ 6050 memset(&rt, 0, sizeof(rt)); 6051 if (g_co.use_set != 0) { 6052 rt.set = g_co.use_set - 1; 6053 rt.flags = IPFW_RCFLAG_SET; 6054 } else 6055 rt.flags = IPFW_RCFLAG_ALL; 6056 if (do_range_cmd(IP_FW_XDEL, &rt) != 0) 6057 err(EX_UNAVAILABLE, "setsockopt(IP_FW_XDEL)"); 6058 if (!g_co.do_quiet) 6059 printf("Flushed all %s.\n", g_co.do_pipe ? "pipes" : "rules"); 6060 } 6061 6062 static struct _s_x intcmds[] = { 6063 { "talist", TOK_TALIST }, 6064 { "iflist", TOK_IFLIST }, 6065 { "olist", TOK_OLIST }, 6066 { "vlist", TOK_VLIST }, 6067 { "monitor", TOK_MONITOR }, 6068 { NULL, 0 } 6069 }; 6070 6071 static struct _s_x otypes[] = { 6072 { "EACTION", IPFW_TLV_EACTION }, 6073 { "DYNSTATE", IPFW_TLV_STATE_NAME }, 6074 { NULL, 0 } 6075 }; 6076 6077 static const char* 6078 lookup_eaction_name(ipfw_obj_ntlv *ntlv, int cnt, uint16_t type) 6079 { 6080 const char *name; 6081 int i; 6082 6083 name = NULL; 6084 for (i = 0; i < cnt; i++) { 6085 if (ntlv[i].head.type != IPFW_TLV_EACTION) 6086 continue; 6087 if (IPFW_TLV_EACTION_NAME(ntlv[i].idx) != type) 6088 continue; 6089 name = ntlv[i].name; 6090 break; 6091 } 6092 return (name); 6093 } 6094 6095 static void 6096 ipfw_list_objects(int ac __unused, char *av[] __unused) 6097 { 6098 ipfw_obj_lheader req, *olh; 6099 ipfw_obj_ntlv *ntlv; 6100 const char *name; 6101 size_t sz; 6102 uint32_t i; 6103 6104 memset(&req, 0, sizeof(req)); 6105 sz = sizeof(req); 6106 if (do_get3(IP_FW_DUMP_SRVOBJECTS, &req.opheader, &sz) != 0) 6107 if (errno != ENOMEM) 6108 return; 6109 6110 sz = req.size; 6111 if ((olh = calloc(1, sz)) == NULL) 6112 return; 6113 6114 olh->size = sz; 6115 if (do_get3(IP_FW_DUMP_SRVOBJECTS, &olh->opheader, &sz) != 0) { 6116 free(olh); 6117 return; 6118 } 6119 6120 if (olh->count > 0) 6121 printf("Objects list:\n"); 6122 else 6123 printf("There are no objects\n"); 6124 ntlv = (ipfw_obj_ntlv *)(olh + 1); 6125 for (i = 0; i < olh->count; i++) { 6126 name = match_value(otypes, ntlv->head.type); 6127 if (name == NULL) 6128 name = lookup_eaction_name( 6129 (ipfw_obj_ntlv *)(olh + 1), olh->count, 6130 ntlv->head.type); 6131 if (name == NULL) 6132 printf(" kidx: %4d\ttype: %10d\tname: %s\n", 6133 ntlv->idx, ntlv->head.type, ntlv->name); 6134 else 6135 printf(" kidx: %4d\ttype: %10s\tname: %s\n", 6136 ntlv->idx, name, ntlv->name); 6137 ntlv++; 6138 } 6139 free(olh); 6140 } 6141 6142 static void 6143 bprint_sa(struct buf_pr *bp, const struct sockaddr *sa) 6144 { 6145 struct sockaddr_storage ss; 6146 char buf[INET6_ADDRSTRLEN]; 6147 6148 memset(&ss, 0, sizeof(ss)); 6149 if (sa->sa_len == 0) 6150 ss.ss_family = sa->sa_family; 6151 else 6152 memcpy(&ss, sa, sa->sa_len); 6153 6154 /* set ss_len in case it was shortened */ 6155 switch (sa->sa_family) { 6156 case AF_INET: 6157 ss.ss_len = sizeof(struct sockaddr_in); 6158 break; 6159 default: 6160 ss.ss_len = sizeof(struct sockaddr_in6); 6161 } 6162 if (getnameinfo((const struct sockaddr *)&ss, ss.ss_len, 6163 buf, sizeof(buf), NULL, 0, NI_NUMERICHOST) != 0) { 6164 bprintf(bp, "bad-addr"); 6165 return; 6166 } 6167 bprintf(bp, "%s", buf); 6168 } 6169 6170 static void 6171 ipfw_rtsock_monitor(const char *filter) 6172 { 6173 char msg[2048], buf[32]; 6174 struct timespec tp; 6175 struct tm tm; 6176 struct buf_pr bp; 6177 struct rt_msghdr *hdr; 6178 struct sockaddr *sa; 6179 struct sockaddr_dl *sdl; 6180 ipfwlog_rtsock_hdr_v2 *loghdr; 6181 ssize_t nread; 6182 size_t msglen; 6183 int rtsock; 6184 6185 rtsock = socket(PF_ROUTE, SOCK_RAW, AF_IPFWLOG); 6186 if (rtsock < 0) 6187 err(EX_UNAVAILABLE, "socket(AF_IPFWLOG)"); 6188 bp_alloc(&bp, 4096); 6189 for (;;) { 6190 nread = read(rtsock, msg, sizeof(msg)); 6191 if (nread < 0) { 6192 warn("read()"); 6193 continue; 6194 } 6195 msglen = nread; 6196 if (msglen < sizeof(*hdr)) 6197 continue; 6198 6199 hdr = (struct rt_msghdr *)msg; 6200 if (hdr->rtm_version != RTM_VERSION || 6201 hdr->rtm_type != RTM_IPFWLOG || 6202 (hdr->rtm_addrs & (1 << RTAX_DST)) == 0 || 6203 (hdr->rtm_addrs & (1 << RTAX_GATEWAY)) == 0 || 6204 (hdr->rtm_addrs & (1 << RTAX_NETMASK)) == 0) 6205 continue; 6206 6207 msglen -= sizeof(*hdr); 6208 sdl = (struct sockaddr_dl *)(hdr + 1); 6209 if (msglen < sizeof(*sdl) || msglen < SA_SIZE(sdl) || 6210 sdl->sdl_family != AF_IPFWLOG || 6211 sdl->sdl_type != 2 /* version */ || 6212 sdl->sdl_alen != sizeof(*loghdr)) 6213 continue; 6214 6215 msglen -= SA_SIZE(sdl); 6216 loghdr = (ipfwlog_rtsock_hdr_v2 *)sdl->sdl_data; 6217 /* filter by rule comment. MAX_COMMENT_LEN = 80 */ 6218 if (filter != NULL && 6219 strncmp(filter, loghdr->comment, 80) != 0) 6220 continue; 6221 6222 sa = (struct sockaddr *)((char *)sdl + SA_SIZE(sdl)); 6223 if (msglen < SA_SIZE(sa)) 6224 continue; 6225 6226 msglen -= SA_SIZE(sa); 6227 bp_flush(&bp); 6228 6229 clock_gettime(CLOCK_REALTIME, &tp); 6230 localtime_r(&tp.tv_sec, &tm); 6231 strftime(buf, sizeof(buf), "%T", &tm); 6232 bprintf(&bp, "%s.%03ld AF %s", buf, tp.tv_nsec / 1000000, 6233 sa->sa_family == AF_INET ? "IPv4" : "IPv6"); 6234 6235 bprintf(&bp, " %s >", 6236 ether_ntoa((const struct ether_addr *)loghdr->ether_shost)); 6237 bprintf(&bp, " %s, ", 6238 ether_ntoa((const struct ether_addr *)loghdr->ether_dhost)); 6239 bprint_sa(&bp, sa); 6240 6241 sa = (struct sockaddr *)((char *)sa + SA_SIZE(sa)); 6242 if (msglen < SA_SIZE(sa)) 6243 continue; 6244 6245 msglen -= SA_SIZE(sa); 6246 bprintf(&bp, " > "); 6247 bprint_sa(&bp, sa); 6248 bprintf(&bp, ", set %u, rulenum %u, targ 0x%08x, " 6249 "%scmd[op %d, len %d, arg1 0x%04x], mark 0x%08x", 6250 sdl->sdl_index, loghdr->rulenum, loghdr->tablearg, 6251 (loghdr->cmd.len & F_NOT) ? "!": "", 6252 loghdr->cmd.opcode, F_LEN(&loghdr->cmd), 6253 loghdr->cmd.arg1, loghdr->mark); 6254 6255 sa = (struct sockaddr *)((char *)sa + SA_SIZE(sa)); 6256 if ((hdr->rtm_addrs & (1 << RTAX_GENMASK)) != 0 && 6257 msglen >= SA_SIZE(sa)) { 6258 msglen -= SA_SIZE(sa); 6259 bprintf(&bp, ", nh "); 6260 bprint_sa(&bp, sa); 6261 } 6262 if (sdl->sdl_nlen > 0) 6263 bprintf(&bp, " // %s", loghdr->comment); 6264 printf("%s\n", bp.buf); 6265 } 6266 bp_free(&bp); 6267 close(rtsock); 6268 } 6269 6270 void 6271 ipfw_internal_handler(int ac, char *av[]) 6272 { 6273 int tcmd; 6274 6275 ac--; av++; 6276 NEED1("internal cmd required"); 6277 6278 if ((tcmd = match_token(intcmds, *av)) == -1) 6279 errx(EX_USAGE, "invalid internal sub-cmd: %s", *av); 6280 6281 switch (tcmd) { 6282 case TOK_IFLIST: 6283 ipfw_list_tifaces(); 6284 break; 6285 case TOK_TALIST: 6286 ipfw_list_ta(ac, av); 6287 break; 6288 case TOK_OLIST: 6289 ipfw_list_objects(ac, av); 6290 break; 6291 case TOK_VLIST: 6292 ipfw_list_values(ac, av); 6293 break; 6294 case TOK_MONITOR: 6295 av++; 6296 ipfw_rtsock_monitor(*av); 6297 break; 6298 } 6299 } 6300 6301 static int 6302 ipfw_get_tracked_ifaces(ipfw_obj_lheader **polh) 6303 { 6304 ipfw_obj_lheader req, *olh; 6305 size_t sz; 6306 6307 memset(&req, 0, sizeof(req)); 6308 sz = sizeof(req); 6309 6310 if (do_get3(IP_FW_XIFLIST, &req.opheader, &sz) != 0) { 6311 if (errno != ENOMEM) 6312 return (errno); 6313 } 6314 6315 sz = req.size; 6316 if ((olh = calloc(1, sz)) == NULL) 6317 return (ENOMEM); 6318 6319 olh->size = sz; 6320 if (do_get3(IP_FW_XIFLIST, &olh->opheader, &sz) != 0) { 6321 free(olh); 6322 return (errno); 6323 } 6324 6325 *polh = olh; 6326 return (0); 6327 } 6328 6329 static int 6330 ifinfo_cmp(const void *a, const void *b) 6331 { 6332 const ipfw_iface_info *ia, *ib; 6333 6334 ia = (const ipfw_iface_info *)a; 6335 ib = (const ipfw_iface_info *)b; 6336 6337 return (stringnum_cmp(ia->ifname, ib->ifname)); 6338 } 6339 6340 /* 6341 * Retrieves table list from kernel, 6342 * optionally sorts it and calls requested function for each table. 6343 * Returns 0 on success. 6344 */ 6345 static void 6346 ipfw_list_tifaces(void) 6347 { 6348 ipfw_obj_lheader *olh = NULL; 6349 ipfw_iface_info *info; 6350 uint32_t i; 6351 int error; 6352 6353 if ((error = ipfw_get_tracked_ifaces(&olh)) != 0) 6354 err(EX_OSERR, "Unable to request ipfw tracked interface list"); 6355 6356 qsort(olh + 1, olh->count, olh->objsize, ifinfo_cmp); 6357 6358 info = (ipfw_iface_info *)(olh + 1); 6359 for (i = 0; i < olh->count; i++) { 6360 if (info->flags & IPFW_IFFLAG_RESOLVED) 6361 printf("%s ifindex: %d refcount: %u changes: %u\n", 6362 info->ifname, info->ifindex, info->refcnt, 6363 info->gencnt); 6364 else 6365 printf("%s ifindex: unresolved refcount: %u changes: %u\n", 6366 info->ifname, info->refcnt, info->gencnt); 6367 info = (ipfw_iface_info *)((caddr_t)info + olh->objsize); 6368 } 6369 6370 free(olh); 6371 } 6372