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-port", LOOKUP_DST_PORT }, 317 { "src-port", LOOKUP_SRC_PORT }, 318 { "dst-mac", LOOKUP_DST_MAC }, 319 { "src-mac", LOOKUP_SRC_MAC }, 320 { "uid", LOOKUP_UID }, 321 { "jail", LOOKUP_JAIL }, 322 { "dscp", LOOKUP_DSCP }, 323 { "mark", LOOKUP_MARK }, 324 { "rulenum", LOOKUP_RULENUM }, 325 { NULL, 0 }, 326 }; 327 328 /* 329 * table(name,valuename=value) instruction accepts one of the 330 * following arguments as valuename. 331 */ 332 static struct _s_x tvalue_names[] = { 333 { "tag", TVALUE_TAG }, 334 { "pipe", TVALUE_PIPE }, 335 { "divert", TVALUE_DIVERT }, 336 { "skipto", TVALUE_SKIPTO }, 337 { "netgraph", TVALUE_NETGRAPH }, 338 { "fib", TVALUE_FIB }, 339 { "nat", TVALUE_NAT }, 340 { "nh4", TVALUE_NH4 }, 341 { "dscp", TVALUE_DSCP }, 342 { "limit", TVALUE_LIMIT }, 343 { "mark", TVALUE_MARK }, 344 { NULL, 0 } 345 }; 346 347 static struct _s_x rule_options[] = { 348 { "tagged", TOK_TAGGED }, 349 { "uid", TOK_UID }, 350 { "gid", TOK_GID }, 351 { "jail", TOK_JAIL }, 352 { "in", TOK_IN }, 353 { "limit", TOK_LIMIT }, 354 { "set-limit", TOK_SETLIMIT }, 355 { "keep-state", TOK_KEEPSTATE }, 356 { "record-state", TOK_RECORDSTATE }, 357 { "bridged", TOK_LAYER2 }, 358 { "layer2", TOK_LAYER2 }, 359 { "out", TOK_OUT }, 360 { "diverted", TOK_DIVERTED }, 361 { "diverted-loopback", TOK_DIVERTEDLOOPBACK }, 362 { "diverted-output", TOK_DIVERTEDOUTPUT }, 363 { "xmit", TOK_XMIT }, 364 { "recv", TOK_RECV }, 365 { "via", TOK_VIA }, 366 { "fragment", TOK_FRAG }, 367 { "frag", TOK_FRAG }, 368 { "fib", TOK_FIB }, 369 { "ipoptions", TOK_IPOPTS }, 370 { "ipopts", TOK_IPOPTS }, 371 { "iplen", TOK_IPLEN }, 372 { "ipid", TOK_IPID }, 373 { "ipprecedence", TOK_IPPRECEDENCE }, 374 { "dscp", TOK_DSCP }, 375 { "iptos", TOK_IPTOS }, 376 { "ipttl", TOK_IPTTL }, 377 { "ipversion", TOK_IPVER }, 378 { "ipver", TOK_IPVER }, 379 { "estab", TOK_ESTAB }, 380 { "established", TOK_ESTAB }, 381 { "setup", TOK_SETUP }, 382 { "sockarg", TOK_SOCKARG }, 383 { "tcpdatalen", TOK_TCPDATALEN }, 384 { "tcpflags", TOK_TCPFLAGS }, 385 { "tcpflgs", TOK_TCPFLAGS }, 386 { "tcpmss", TOK_TCPMSS }, 387 { "tcpoptions", TOK_TCPOPTS }, 388 { "tcpopts", TOK_TCPOPTS }, 389 { "tcpseq", TOK_TCPSEQ }, 390 { "tcpack", TOK_TCPACK }, 391 { "tcpwin", TOK_TCPWIN }, 392 { "icmptype", TOK_ICMPTYPES }, 393 { "icmptypes", TOK_ICMPTYPES }, 394 { "dst-ip", TOK_DSTIP }, 395 { "src-ip", TOK_SRCIP }, 396 { "dst-port", TOK_DSTPORT }, 397 { "src-port", TOK_SRCPORT }, 398 { "dst-mac", TOK_DSTMAC }, 399 { "src-mac", TOK_SRCMAC }, 400 { "proto", TOK_PROTO }, 401 { "MAC", TOK_MAC }, 402 { "mac", TOK_MAC }, 403 { "mac-type", TOK_MACTYPE }, 404 { "verrevpath", TOK_VERREVPATH }, 405 { "versrcreach", TOK_VERSRCREACH }, 406 { "antispoof", TOK_ANTISPOOF }, 407 { "ipsec", TOK_IPSEC }, 408 { "icmp6type", TOK_ICMP6TYPES }, 409 { "icmp6types", TOK_ICMP6TYPES }, 410 { "ext6hdr", TOK_EXT6HDR }, 411 { "flow-id", TOK_FLOWID }, 412 { "ipv6", TOK_IPV6 }, 413 { "ip6", TOK_IPV6 }, 414 { "ipv4", TOK_IPV4 }, 415 { "ip4", TOK_IPV4 }, 416 { "dst-ipv6", TOK_DSTIP6 }, 417 { "dst-ip6", TOK_DSTIP6 }, 418 { "src-ipv6", TOK_SRCIP6 }, 419 { "src-ip6", TOK_SRCIP6 }, 420 { "lookup", TOK_LOOKUP }, 421 { "flow", TOK_FLOW }, 422 { "mark", TOK_MARK }, 423 { "defer-action", TOK_SKIPACTION }, 424 { "defer-immediate-action", TOK_SKIPACTION }, 425 { "//", TOK_COMMENT }, 426 427 { "not", TOK_NOT }, /* pseudo option */ 428 { "!", /* escape ? */ TOK_NOT }, /* pseudo option */ 429 { "or", TOK_OR }, /* pseudo option */ 430 { "|", /* escape */ TOK_OR }, /* pseudo option */ 431 { "{", TOK_STARTBRACE }, /* pseudo option */ 432 { "(", TOK_STARTBRACE }, /* pseudo option */ 433 { "}", TOK_ENDBRACE }, /* pseudo option */ 434 { ")", TOK_ENDBRACE }, /* pseudo option */ 435 { NULL, 0 } /* terminator */ 436 }; 437 438 void bprint_uint_arg(struct buf_pr *bp, const char *str, uint32_t arg); 439 static int ipfw_get_config(struct cmdline_opts *co, struct format_opts *fo, 440 ipfw_cfg_lheader **pcfg, size_t *psize); 441 static int ipfw_show_config(struct cmdline_opts *co, struct format_opts *fo, 442 ipfw_cfg_lheader *cfg, size_t sz, int ac, char **av); 443 static void ipfw_list_tifaces(void); 444 445 struct tidx; 446 static uint32_t pack_object(struct tidx *tstate, const char *name, int otype); 447 static uint32_t pack_table(struct tidx *tstate, const char *name); 448 449 static char *table_search_ctlv(ipfw_obj_ctlv *ctlv, uint32_t idx); 450 static void object_sort_ctlv(ipfw_obj_ctlv *ctlv); 451 static char *object_search_ctlv(ipfw_obj_ctlv *ctlv, uint32_t idx, 452 uint16_t type); 453 454 int 455 is_ipfw(void) 456 { 457 return (g_co.prog == cmdline_prog_ipfw); 458 } 459 460 /* 461 * Simple string buffer API. 462 * Used to simplify buffer passing between function and for 463 * transparent overrun handling. 464 */ 465 466 /* 467 * Allocates new buffer of given size @sz. 468 * 469 * Returns 0 on success. 470 */ 471 int 472 bp_alloc(struct buf_pr *b, size_t size) 473 { 474 memset(b, 0, sizeof(struct buf_pr)); 475 476 if ((b->buf = calloc(1, size)) == NULL) 477 return (ENOMEM); 478 479 b->ptr = b->buf; 480 b->size = size; 481 b->avail = b->size; 482 483 return (0); 484 } 485 486 void 487 bp_free(struct buf_pr *b) 488 { 489 490 free(b->buf); 491 } 492 493 /* 494 * Flushes buffer so new writer start from beginning. 495 */ 496 void 497 bp_flush(struct buf_pr *b) 498 { 499 500 b->ptr = b->buf; 501 b->avail = b->size; 502 b->buf[0] = '\0'; 503 } 504 505 /* 506 * Print message specified by @format and args. 507 * Automatically manage buffer space and transparently handle 508 * buffer overruns. 509 * 510 * Returns number of bytes that should have been printed. 511 */ 512 int 513 bprintf(struct buf_pr *b, const char *format, ...) 514 { 515 va_list args; 516 int i; 517 518 va_start(args, format); 519 520 i = vsnprintf(b->ptr, b->avail, format, args); 521 va_end(args); 522 523 if (i < 0 || (size_t)i > b->avail) { 524 /* Overflow or print error */ 525 b->avail = 0; 526 } else { 527 b->ptr += i; 528 b->avail -= i; 529 } 530 531 b->needed += i; 532 533 return (i); 534 } 535 536 /* 537 * Special values printer for tablearg-aware opcodes. 538 */ 539 void 540 bprint_uint_arg(struct buf_pr *bp, const char *str, uint32_t arg) 541 { 542 543 if (str != NULL) 544 bprintf(bp, "%s", str); 545 if (arg == IP_FW_TARG) 546 bprintf(bp, "tablearg"); 547 else 548 bprintf(bp, "%u", arg); 549 } 550 551 /* 552 * Helper routine to print a possibly unaligned uint64_t on 553 * various platform. If width > 0, print the value with 554 * the desired width, followed by a space; 555 * otherwise, return the required width. 556 */ 557 int 558 pr_u64(struct buf_pr *b, void *pd, int width) 559 { 560 #ifdef TCC 561 #define U64_FMT "I64" 562 #else 563 #define U64_FMT "llu" 564 #endif 565 uint64_t u; 566 unsigned long long d; 567 568 bcopy (pd, &u, sizeof(u)); 569 d = u; 570 return (width > 0) ? 571 bprintf(b, "%*" U64_FMT " ", width, d) : 572 snprintf(NULL, 0, "%" U64_FMT, d) ; 573 #undef U64_FMT 574 } 575 576 577 void * 578 safe_calloc(size_t number, size_t size) 579 { 580 void *ret = calloc(number, size); 581 582 if (ret == NULL) 583 err(EX_OSERR, "calloc"); 584 return ret; 585 } 586 587 void * 588 safe_realloc(void *ptr, size_t size) 589 { 590 void *ret = realloc(ptr, size); 591 592 if (ret == NULL) 593 err(EX_OSERR, "realloc"); 594 return ret; 595 } 596 597 /* 598 * Compare things like interface or table names. 599 */ 600 int 601 stringnum_cmp(const char *a, const char *b) 602 { 603 int la, lb; 604 605 la = strlen(a); 606 lb = strlen(b); 607 608 if (la > lb) 609 return (1); 610 else if (la < lb) 611 return (-01); 612 613 return (strcmp(a, b)); 614 } 615 616 struct debug_header { 617 uint16_t cmd_type; 618 uint16_t spare1; 619 uint32_t opt_name; 620 uint32_t total_len; 621 uint32_t spare2; 622 }; 623 624 /* 625 * conditionally runs the command. 626 * Selected options or negative -> getsockopt 627 */ 628 int 629 do_cmd(int optname, void *optval, uintptr_t optlen) 630 { 631 int i; 632 633 if (g_co.debug_only) { 634 struct debug_header dbg = { 635 .cmd_type = 1, 636 .opt_name = optname, 637 .total_len = optlen + sizeof(struct debug_header), 638 }; 639 write(1, &dbg, sizeof(dbg)); 640 write(1, optval, optlen); 641 } 642 643 if (g_co.test_only) 644 return (0); 645 646 if (ipfw_socket == -1) 647 ipfw_socket = socket(AF_INET, SOCK_RAW, IPPROTO_RAW); 648 if (ipfw_socket < 0) 649 err(EX_UNAVAILABLE, "socket"); 650 651 if (optname == IP_FW3 || optname < 0) { 652 if (optname < 0) 653 optname = -optname; 654 i = getsockopt(ipfw_socket, IPPROTO_IP, optname, optval, 655 (socklen_t *)optlen); 656 } else { 657 i = setsockopt(ipfw_socket, IPPROTO_IP, optname, optval, optlen); 658 } 659 return (i); 660 } 661 662 /* 663 * do_set3 - pass ipfw control cmd to kernel 664 * @optname: option name 665 * @optval: pointer to option data 666 * @optlen: option length 667 * 668 * Assumes op3 header is already embedded. 669 * Calls setsockopt() with IP_FW3 as kernel-visible opcode. 670 * Returns 0 on success or errno otherwise. 671 */ 672 int 673 do_set3(int optname, ip_fw3_opheader *op3, size_t optlen) 674 { 675 676 op3->opcode = optname; 677 op3->version = IP_FW3_OPVER; /* use last version */ 678 679 if (g_co.debug_only) { 680 struct debug_header dbg = { 681 .cmd_type = 2, 682 .opt_name = optname, 683 .total_len = optlen, sizeof(struct debug_header), 684 }; 685 write(1, &dbg, sizeof(dbg)); 686 write(1, op3, optlen); 687 } 688 689 if (g_co.test_only) 690 return (0); 691 692 if (ipfw_socket == -1) 693 ipfw_socket = socket(AF_INET, SOCK_RAW, IPPROTO_RAW); 694 if (ipfw_socket < 0) 695 err(EX_UNAVAILABLE, "socket"); 696 697 698 return (setsockopt(ipfw_socket, IPPROTO_IP, IP_FW3, op3, optlen)); 699 } 700 701 /* 702 * do_get3 - pass ipfw control cmd to kernel 703 * @optname: option name 704 * @optval: pointer to option data 705 * @optlen: pointer to option length 706 * 707 * Assumes op3 header is already embedded. 708 * Calls getsockopt() with IP_FW3 as kernel-visible opcode. 709 * Returns 0 on success or errno otherwise. 710 */ 711 int 712 do_get3(int optname, ip_fw3_opheader *op3, size_t *optlen) 713 { 714 int error; 715 socklen_t len; 716 717 op3->opcode = optname; 718 op3->version = IP_FW3_OPVER; /* use last version */ 719 720 if (g_co.debug_only) { 721 struct debug_header dbg = { 722 .cmd_type = 3, 723 .opt_name = optname, 724 .total_len = *optlen + sizeof(struct debug_header), 725 }; 726 write(1, &dbg, sizeof(dbg)); 727 write(1, op3, *optlen); 728 } 729 730 if (g_co.test_only) 731 return (0); 732 733 if (ipfw_socket == -1) 734 ipfw_socket = socket(AF_INET, SOCK_RAW, IPPROTO_RAW); 735 if (ipfw_socket < 0) 736 err(EX_UNAVAILABLE, "socket"); 737 738 739 len = *optlen; 740 error = getsockopt(ipfw_socket, IPPROTO_IP, IP_FW3, op3, &len); 741 *optlen = len; 742 743 return (error); 744 } 745 746 /** 747 * match_token takes a table and a string, returns the value associated 748 * with the string (-1 in case of failure). 749 */ 750 int 751 match_token(struct _s_x *table, const char *string) 752 { 753 struct _s_x *pt; 754 uint i = strlen(string); 755 756 for (pt = table ; i && pt->s != NULL ; pt++) 757 if (strlen(pt->s) == i && !bcmp(string, pt->s, i)) 758 return pt->x; 759 return (-1); 760 } 761 762 /** 763 * match_token_relaxed takes a table and a string, returns the value associated 764 * with the string for the best match. 765 * 766 * Returns: 767 * value from @table for matched records 768 * -1 for non-matched records 769 * -2 if more than one records match @string. 770 */ 771 int 772 match_token_relaxed(struct _s_x *table, const char *string) 773 { 774 struct _s_x *pt, *m; 775 int i, c; 776 777 i = strlen(string); 778 c = 0; 779 780 for (pt = table ; i != 0 && pt->s != NULL ; pt++) { 781 if (strncmp(pt->s, string, i) != 0) 782 continue; 783 m = pt; 784 c++; 785 } 786 787 if (c == 1) 788 return (m->x); 789 790 return (c > 0 ? -2: -1); 791 } 792 793 int 794 get_token(struct _s_x *table, const char *string, const char *errbase) 795 { 796 int tcmd; 797 798 if ((tcmd = match_token_relaxed(table, string)) < 0) 799 errx(EX_USAGE, "%s %s %s", 800 (tcmd == 0) ? "invalid" : "ambiguous", errbase, string); 801 802 return (tcmd); 803 } 804 805 /** 806 * match_value takes a table and a value, returns the string associated 807 * with the value (NULL in case of failure). 808 */ 809 char const * 810 match_value(struct _s_x *p, int value) 811 { 812 for (; p->s != NULL; p++) 813 if (p->x == value) 814 return p->s; 815 return NULL; 816 } 817 818 size_t 819 concat_tokens(char *buf, size_t bufsize, struct _s_x *table, 820 const char *delimiter) 821 { 822 struct _s_x *pt; 823 int l; 824 size_t sz; 825 826 for (sz = 0, pt = table ; pt->s != NULL; pt++) { 827 l = snprintf(buf + sz, bufsize - sz, "%s%s", 828 (sz == 0) ? "" : delimiter, pt->s); 829 sz += l; 830 bufsize += l; 831 if (sz > bufsize) 832 return (bufsize); 833 } 834 835 return (sz); 836 } 837 838 /* 839 * helper function to process a set of flags and set bits in the 840 * appropriate masks. 841 */ 842 int 843 fill_flags(struct _s_x *flags, char *p, char **e, uint32_t *set, 844 uint32_t *clear) 845 { 846 char *q; /* points to the separator */ 847 int val; 848 uint32_t *which; /* mask we are working on */ 849 850 while (p && *p) { 851 if (*p == '!') { 852 p++; 853 which = clear; 854 } else 855 which = set; 856 q = strchr(p, ','); 857 if (q) 858 *q++ = '\0'; 859 val = match_token(flags, p); 860 if (val <= 0) { 861 if (e != NULL) 862 *e = p; 863 return (-1); 864 } 865 *which |= (uint32_t)val; 866 p = q; 867 } 868 return (0); 869 } 870 871 void 872 print_flags_buffer(char *buf, size_t sz, struct _s_x *list, uint32_t set) 873 { 874 char const *comma = ""; 875 int i, l; 876 877 for (i = 0; list[i].x != 0; i++) { 878 if ((set & list[i].x) == 0) 879 continue; 880 881 set &= ~list[i].x; 882 l = snprintf(buf, sz, "%s%s", comma, list[i].s); 883 if (l < 0 || (size_t)l >= sz) 884 return; 885 comma = ","; 886 buf += l; 887 sz -=l; 888 } 889 } 890 891 /* 892 * _substrcmp takes two strings and returns 1 if they do not match, 893 * and 0 if they match exactly or the first string is a sub-string 894 * of the second. A warning is printed to stderr in the case that the 895 * first string is a sub-string of the second. 896 * 897 * This function will be removed in the future through the usual 898 * deprecation process. 899 */ 900 int 901 _substrcmp(const char *str1, const char* str2) 902 { 903 904 if (strncmp(str1, str2, strlen(str1)) != 0) 905 return 1; 906 907 if (strlen(str1) != strlen(str2)) 908 warnx("DEPRECATED: '%s' matched '%s' as a sub-string", 909 str1, str2); 910 return 0; 911 } 912 913 /* 914 * _substrcmp2 takes three strings and returns 1 if the first two do not match, 915 * and 0 if they match exactly or the second string is a sub-string 916 * of the first. A warning is printed to stderr in the case that the 917 * first string does not match the third. 918 * 919 * This function exists to warn about the bizarre construction 920 * strncmp(str, "by", 2) which is used to allow people to use a shortcut 921 * for "bytes". The problem is that in addition to accepting "by", 922 * "byt", "byte", and "bytes", it also excepts "by_rabid_dogs" and any 923 * other string beginning with "by". 924 * 925 * This function will be removed in the future through the usual 926 * deprecation process. 927 */ 928 int 929 _substrcmp2(const char *str1, const char* str2, const char* str3) 930 { 931 932 if (strncmp(str1, str2, strlen(str2)) != 0) 933 return 1; 934 935 if (strcmp(str1, str3) != 0) 936 warnx("DEPRECATED: '%s' matched '%s'", 937 str1, str3); 938 return 0; 939 } 940 941 /* 942 * prints one port, symbolic or numeric 943 */ 944 static void 945 print_port(struct buf_pr *bp, int proto, uint16_t port) 946 { 947 948 if (proto == IPPROTO_ETHERTYPE) { 949 char const *s; 950 951 if (g_co.do_resolv && (s = match_value(ether_types, port)) ) 952 bprintf(bp, "%s", s); 953 else 954 bprintf(bp, "0x%04x", port); 955 } else { 956 struct servent *se = NULL; 957 if (g_co.do_resolv) { 958 struct protoent *pe = getprotobynumber(proto); 959 960 se = getservbyport(htons(port), pe ? pe->p_name : NULL); 961 } 962 if (se) 963 bprintf(bp, "%s", se->s_name); 964 else 965 bprintf(bp, "%d", port); 966 } 967 } 968 969 static struct _s_x _port_name[] = { 970 {"dst-port", O_IP_DSTPORT}, 971 {"src-port", O_IP_SRCPORT}, 972 {"ipid", O_IPID}, 973 {"iplen", O_IPLEN}, 974 {"ipttl", O_IPTTL}, 975 {"mac-type", O_MAC_TYPE}, 976 {"tcpdatalen", O_TCPDATALEN}, 977 {"tcpmss", O_TCPMSS}, 978 {"tcpwin", O_TCPWIN}, 979 {"tagged", O_TAGGED}, 980 {NULL, 0} 981 }; 982 983 /* 984 * Print the values in a list 16-bit items of the types above. 985 * XXX todo: add support for mask. 986 */ 987 static void 988 print_newports(struct buf_pr *bp, const ipfw_insn_u16 *cmd, int proto, int opcode) 989 { 990 const uint16_t *p = cmd->ports; 991 int i; 992 char const *sep; 993 994 if (opcode != 0) { 995 sep = match_value(_port_name, opcode); 996 if (sep == NULL) 997 sep = "???"; 998 bprintf(bp, " %s", sep); 999 } 1000 sep = " "; 1001 for (i = F_LEN((const ipfw_insn *)cmd) - 1; i > 0; i--, p += 2) { 1002 bprintf(bp, "%s", sep); 1003 print_port(bp, proto, p[0]); 1004 if (p[0] != p[1]) { 1005 bprintf(bp, "-"); 1006 print_port(bp, proto, p[1]); 1007 } 1008 sep = ","; 1009 } 1010 } 1011 1012 /* 1013 * Like strtol, but also translates service names into port numbers 1014 * for some protocols. 1015 * In particular: 1016 * proto == -1 disables the protocol check; 1017 * proto == IPPROTO_ETHERTYPE looks up an internal table 1018 * proto == <some value in /etc/protocols> matches the values there. 1019 * Returns *end == s in case the parameter is not found. 1020 */ 1021 static int 1022 strtoport(char *s, char **end, int base, int proto) 1023 { 1024 char *p, *buf; 1025 char *s1; 1026 int i; 1027 1028 *end = s; /* default - not found */ 1029 if (*s == '\0') 1030 return 0; /* not found */ 1031 1032 if (isdigit(*s)) 1033 return strtol(s, end, base); 1034 1035 /* 1036 * find separator. '\\' escapes the next char. 1037 */ 1038 for (s1 = s; *s1 && (isalnum(*s1) || *s1 == '\\' || 1039 *s1 == '_' || *s1 == '.') ; s1++) 1040 if (*s1 == '\\' && s1[1] != '\0') 1041 s1++; 1042 1043 buf = safe_calloc(s1 - s + 1, 1); 1044 1045 /* 1046 * copy into a buffer skipping backslashes 1047 */ 1048 for (p = s, i = 0; p != s1 ; p++) 1049 if (*p != '\\') 1050 buf[i++] = *p; 1051 buf[i++] = '\0'; 1052 1053 if (proto == IPPROTO_ETHERTYPE) { 1054 i = match_token(ether_types, buf); 1055 free(buf); 1056 if (i != -1) { /* found */ 1057 *end = s1; 1058 return i; 1059 } 1060 } else { 1061 struct protoent *pe = NULL; 1062 struct servent *se; 1063 1064 if (proto != 0) 1065 pe = getprotobynumber(proto); 1066 setservent(1); 1067 se = getservbyname(buf, pe ? pe->p_name : NULL); 1068 free(buf); 1069 if (se != NULL) { 1070 *end = s1; 1071 return ntohs(se->s_port); 1072 } 1073 } 1074 return 0; /* not found */ 1075 } 1076 1077 /* 1078 * Fill the body of the command with the list of port ranges. 1079 */ 1080 static int 1081 fill_newports(ipfw_insn_u16 *cmd, char *av, int proto, int cblen) 1082 { 1083 uint16_t a, b, *p = cmd->ports; 1084 int i = 0; 1085 char *s = av; 1086 1087 while (*s) { 1088 a = strtoport(av, &s, 0, proto); 1089 if (s == av) /* empty or invalid argument */ 1090 return (0); 1091 1092 CHECK_LENGTH(cblen, i + 2); 1093 1094 switch (*s) { 1095 case '-': /* a range */ 1096 av = s + 1; 1097 b = strtoport(av, &s, 0, proto); 1098 /* Reject expressions like '1-abc' or '1-2-3'. */ 1099 if (s == av || (*s != ',' && *s != '\0')) 1100 return (0); 1101 p[0] = a; 1102 p[1] = b; 1103 break; 1104 case ',': /* comma separated list */ 1105 case '\0': 1106 p[0] = p[1] = a; 1107 break; 1108 default: 1109 warnx("port list: invalid separator <%c> in <%s>", 1110 *s, av); 1111 return (0); 1112 } 1113 1114 i++; 1115 p += 2; 1116 av = s + 1; 1117 } 1118 if (i > 0) { 1119 if (i + 1 > F_LEN_MASK) 1120 errx(EX_DATAERR, "too many ports/ranges\n"); 1121 cmd->o.len |= i + 1; /* leave F_NOT and F_OR untouched */ 1122 } 1123 return (i); 1124 } 1125 1126 /* 1127 * Fill the body of the command with the list of DiffServ codepoints. 1128 */ 1129 static void 1130 fill_dscp(ipfw_insn *cmd, char *av, int cblen) 1131 { 1132 uint32_t *low, *high; 1133 char *s = av, *a; 1134 int code; 1135 1136 cmd->opcode = O_DSCP; 1137 cmd->len |= F_INSN_SIZE(ipfw_insn_u32) + 1; 1138 1139 CHECK_CMDLEN; 1140 1141 low = (uint32_t *)(cmd + 1); 1142 high = low + 1; 1143 1144 *low = 0; 1145 *high = 0; 1146 1147 while (s != NULL) { 1148 a = strchr(s, ','); 1149 1150 if (a != NULL) 1151 *a++ = '\0'; 1152 1153 if (isalpha(*s)) { 1154 if ((code = match_token(f_ipdscp, s)) == -1) 1155 errx(EX_DATAERR, "Unknown DSCP code"); 1156 } else { 1157 code = strtoul(s, NULL, 10); 1158 if (code < 0 || code > 63) 1159 errx(EX_DATAERR, "Invalid DSCP value"); 1160 } 1161 1162 if (code >= 32) 1163 *high |= 1 << (code - 32); 1164 else 1165 *low |= 1 << code; 1166 1167 s = a; 1168 } 1169 } 1170 1171 /* 1172 * Fill the body of the command with mark value and mask. 1173 */ 1174 static void 1175 fill_mark(ipfw_insn *cmd, char *av, int cblen) 1176 { 1177 uint32_t *value, *mask; 1178 char *value_str; 1179 1180 cmd->opcode = O_MARK; 1181 cmd->len |= F_INSN_SIZE(ipfw_insn_u32) + 1; 1182 1183 CHECK_CMDLEN; 1184 1185 value = (uint32_t *)(cmd + 1); 1186 mask = value + 1; 1187 1188 value_str = strsep(&av, ":"); 1189 1190 if (strcmp(value_str, "tablearg") == 0) { 1191 cmd->arg1 = IP_FW_TARG; 1192 *value = 0; 1193 } else { 1194 /* This is not a tablearg */ 1195 cmd->arg1 |= 0x8000; 1196 *value = strtoul(value_str, NULL, 0); 1197 } 1198 if (av) 1199 *mask = strtoul(av, NULL, 0); 1200 else 1201 *mask = 0xFFFFFFFF; 1202 1203 if ((*value & *mask) != *value) 1204 errx(EX_DATAERR, "Static mark value: some bits in value are" 1205 " set that will be masked out by mask " 1206 "(%#x & %#x) = %#x != %#x", 1207 *value, *mask, (*value & *mask), *value); 1208 } 1209 1210 static struct _s_x icmpcodes[] = { 1211 { "net", ICMP_UNREACH_NET }, 1212 { "host", ICMP_UNREACH_HOST }, 1213 { "protocol", ICMP_UNREACH_PROTOCOL }, 1214 { "port", ICMP_UNREACH_PORT }, 1215 { "needfrag", ICMP_UNREACH_NEEDFRAG }, 1216 { "srcfail", ICMP_UNREACH_SRCFAIL }, 1217 { "net-unknown", ICMP_UNREACH_NET_UNKNOWN }, 1218 { "host-unknown", ICMP_UNREACH_HOST_UNKNOWN }, 1219 { "isolated", ICMP_UNREACH_ISOLATED }, 1220 { "net-prohib", ICMP_UNREACH_NET_PROHIB }, 1221 { "host-prohib", ICMP_UNREACH_HOST_PROHIB }, 1222 { "tosnet", ICMP_UNREACH_TOSNET }, 1223 { "toshost", ICMP_UNREACH_TOSHOST }, 1224 { "filter-prohib", ICMP_UNREACH_FILTER_PROHIB }, 1225 { "host-precedence", ICMP_UNREACH_HOST_PRECEDENCE }, 1226 { "precedence-cutoff", ICMP_UNREACH_PRECEDENCE_CUTOFF }, 1227 { NULL, 0 } 1228 }; 1229 1230 static uint16_t 1231 get_reject_code(const char *str) 1232 { 1233 int val; 1234 char *s; 1235 1236 val = strtoul(str, &s, 0); 1237 if (s == str || *s != '\0' || val >= 0x100) 1238 val = match_token(icmpcodes, str); 1239 if (val < 0) 1240 errx(EX_DATAERR, "unknown ICMP unreachable code ``%s''", str); 1241 return (val); 1242 } 1243 1244 static void 1245 print_reject_code(struct buf_pr *bp, uint16_t code) 1246 { 1247 char const *s; 1248 1249 if ((s = match_value(icmpcodes, code)) != NULL) 1250 bprintf(bp, "unreach %s", s); 1251 else 1252 bprintf(bp, "unreach %u", code); 1253 } 1254 1255 /* 1256 * Returns the number of bits set (from left) in a contiguous bitmask, 1257 * or -1 if the mask is not contiguous. 1258 * XXX this needs a proper fix. 1259 * This effectively works on masks in big-endian (network) format. 1260 * when compiled on little endian architectures. 1261 * 1262 * First bit is bit 7 of the first byte -- note, for MAC addresses, 1263 * the first bit on the wire is bit 0 of the first byte. 1264 * len is the max length in bits. 1265 */ 1266 int 1267 contigmask(const uint8_t *p, int len) 1268 { 1269 int i, n; 1270 1271 for (i=0; i<len ; i++) 1272 if ( (p[i/8] & (1 << (7 - (i%8)))) == 0) /* first bit unset */ 1273 break; 1274 for (n=i+1; n < len; n++) 1275 if ( (p[n/8] & (1 << (7 - (n%8)))) != 0) 1276 return -1; /* mask not contiguous */ 1277 return i; 1278 } 1279 1280 /* 1281 * print flags set/clear in the two bitmasks passed as parameters. 1282 * There is a specialized check for f_tcpflags. 1283 */ 1284 static void 1285 print_flags(struct buf_pr *bp, char const *name, const ipfw_insn *cmd, 1286 struct _s_x *list) 1287 { 1288 char const *comma = ""; 1289 int i; 1290 uint8_t set = cmd->arg1 & 0xff; 1291 uint8_t clear = (cmd->arg1 >> 8) & 0xff; 1292 1293 if (list == f_tcpflags && set == TH_SYN && clear == TH_ACK) { 1294 bprintf(bp, " setup"); 1295 return; 1296 } 1297 1298 bprintf(bp, " %s ", name); 1299 for (i=0; list[i].x != 0; i++) { 1300 if (set & list[i].x) { 1301 set &= ~list[i].x; 1302 bprintf(bp, "%s%s", comma, list[i].s); 1303 comma = ","; 1304 } 1305 if (clear & list[i].x) { 1306 clear &= ~list[i].x; 1307 bprintf(bp, "%s!%s", comma, list[i].s); 1308 comma = ","; 1309 } 1310 } 1311 } 1312 1313 static void 1314 print_tvalue(struct buf_pr *bp, const ipfw_insn_table *cmd) 1315 { 1316 const char *name; 1317 1318 name = match_value(tvalue_names, IPFW_TVALUE_TYPE(&cmd->o)); 1319 bprintf(bp, ",%s=%u", name != NULL ? name: "<invalid>", cmd->value); 1320 } 1321 1322 1323 /* 1324 * Print the ip address contained in a command. 1325 */ 1326 static void 1327 print_ip(struct buf_pr *bp, const struct format_opts *fo, 1328 const ipfw_insn_ip *cmd) 1329 { 1330 struct hostent *he = NULL; 1331 const struct in_addr *ia; 1332 const uint32_t *a = ((const ipfw_insn_u32 *)cmd)->d; 1333 uint32_t len = F_LEN(&cmd->o); 1334 char *t; 1335 1336 bprintf(bp, " "); 1337 switch (cmd->o.opcode) { 1338 case O_IP_SRC_ME: 1339 case O_IP_DST_ME: 1340 bprintf(bp, "me"); 1341 return; 1342 1343 case O_IP_DST_LOOKUP: 1344 if ((len == F_INSN_SIZE(ipfw_insn_kidx) || 1345 len == F_INSN_SIZE(ipfw_insn_table)) && 1346 IPFW_LOOKUP_TYPE(&cmd->o) != LOOKUP_NONE) { 1347 const char *key; 1348 1349 key = match_value(lookup_keys, 1350 IPFW_LOOKUP_TYPE(&cmd->o)); 1351 t = table_search_ctlv(fo->tstate, 1352 insntoc(&cmd->o, kidx)->kidx); 1353 if (len == F_INSN_SIZE(ipfw_insn_table)) { 1354 bprintf(bp, "lookup %s:%#x %s", 1355 (key != NULL ? key : "<invalid>"), 1356 insntoc(&cmd->o, table)->value, t); 1357 } else 1358 bprintf(bp, "lookup %s %s", key != NULL ? key: 1359 "<invalid>", t); 1360 return; 1361 } 1362 /* FALLTHROUGH */ 1363 case O_IP_SRC_LOOKUP: 1364 t = table_search_ctlv(fo->tstate, 1365 insntoc(&cmd->o, kidx)->kidx); 1366 bprintf(bp, "table(%s", t); 1367 if (len == F_INSN_SIZE(ipfw_insn_table)) 1368 print_tvalue(bp, insntoc(&cmd->o, table)); 1369 bprintf(bp, ")"); 1370 return; 1371 } 1372 1373 if (cmd->o.opcode == O_IP_SRC_SET || cmd->o.opcode == O_IP_DST_SET) { 1374 const uint32_t *map = (const uint32_t *)&cmd->mask; 1375 struct in_addr addr; 1376 uint32_t x; 1377 int i, j; 1378 char comma = '{'; 1379 1380 x = cmd->o.arg1 - 1; 1381 x = htonl(~x); 1382 addr.s_addr = htonl(cmd->addr.s_addr); 1383 bprintf(bp, "%s/%d", inet_ntoa(addr), 1384 contigmask((uint8_t *)&x, 32)); 1385 x = cmd->addr.s_addr; 1386 x &= 0xff; /* base */ 1387 /* 1388 * Print bits and ranges. 1389 * Locate first bit set (i), then locate first bit unset (j). 1390 * If we have 3+ consecutive bits set, then print them as a 1391 * range, otherwise only print the initial bit and rescan. 1392 */ 1393 for (i=0; i < cmd->o.arg1; i++) 1394 if (map[i/32] & (1<<(i & 31))) { 1395 for (j=i+1; j < cmd->o.arg1; j++) 1396 if (!(map[ j/32] & (1<<(j & 31)))) 1397 break; 1398 bprintf(bp, "%c%d", comma, i+x); 1399 if (j>i+2) { /* range has at least 3 elements */ 1400 bprintf(bp, "-%d", j-1+x); 1401 i = j-1; 1402 } 1403 comma = ','; 1404 } 1405 bprintf(bp, "}"); 1406 return; 1407 } 1408 /* 1409 * len == 2 indicates a single IP, whereas lists of 1 or more 1410 * addr/mask pairs have len = (2n+1). We convert len to n so we 1411 * use that to count the number of entries. 1412 */ 1413 for (len = len / 2; len > 0; len--, a += 2) { 1414 int mb = /* mask length */ 1415 (cmd->o.opcode == O_IP_SRC || cmd->o.opcode == O_IP_DST) ? 1416 32 : contigmask((const uint8_t *)&(a[1]), 32); 1417 if (mb == 32 && g_co.do_resolv) 1418 he = gethostbyaddr((const char *)&(a[0]), sizeof(in_addr_t), 1419 AF_INET); 1420 if (he != NULL) /* resolved to name */ 1421 bprintf(bp, "%s", he->h_name); 1422 else if (mb == 0) /* any */ 1423 bprintf(bp, "any"); 1424 else { /* numeric IP followed by some kind of mask */ 1425 ia = (const struct in_addr *)&a[0]; 1426 bprintf(bp, "%s", inet_ntoa(*ia)); 1427 if (mb < 0) { 1428 ia = (const struct in_addr *)&a[1]; 1429 bprintf(bp, ":%s", inet_ntoa(*ia)); 1430 } else if (mb < 32) 1431 bprintf(bp, "/%d", mb); 1432 } 1433 if (len > 1) 1434 bprintf(bp, ","); 1435 } 1436 } 1437 1438 /* 1439 * prints a MAC address/mask pair 1440 */ 1441 static void 1442 format_mac(struct buf_pr *bp, const uint8_t *addr, const uint8_t *mask) 1443 { 1444 int l = contigmask(mask, 48); 1445 1446 if (l == 0) 1447 bprintf(bp, " any"); 1448 else { 1449 bprintf(bp, " %02x:%02x:%02x:%02x:%02x:%02x", 1450 addr[0], addr[1], addr[2], addr[3], addr[4], addr[5]); 1451 if (l == -1) 1452 bprintf(bp, "&%02x:%02x:%02x:%02x:%02x:%02x", 1453 mask[0], mask[1], mask[2], 1454 mask[3], mask[4], mask[5]); 1455 else if (l < 48) 1456 bprintf(bp, "/%d", l); 1457 } 1458 } 1459 1460 static void 1461 print_mac(struct buf_pr *bp, const ipfw_insn_mac *mac) 1462 { 1463 1464 bprintf(bp, " MAC"); 1465 format_mac(bp, mac->addr, mac->mask); 1466 format_mac(bp, mac->addr + 6, mac->mask + 6); 1467 } 1468 1469 static void 1470 print_mac_lookup(struct buf_pr *bp, const struct format_opts *fo, 1471 const ipfw_insn *cmd) 1472 { 1473 uint32_t len = F_LEN(cmd); 1474 char *t; 1475 1476 bprintf(bp, " "); 1477 1478 t = table_search_ctlv(fo->tstate, insntoc(cmd, kidx)->kidx); 1479 bprintf(bp, "table(%s", t); 1480 if (len == F_INSN_SIZE(ipfw_insn_table)) 1481 print_tvalue(bp, insntoc(cmd, table)); 1482 bprintf(bp, ")"); 1483 } 1484 1485 static void 1486 fill_icmptypes(ipfw_insn_u32 *cmd, char *av) 1487 { 1488 uint8_t type; 1489 1490 cmd->d[0] = 0; 1491 while (*av) { 1492 if (*av == ',') 1493 av++; 1494 1495 type = strtoul(av, &av, 0); 1496 1497 if (*av != ',' && *av != '\0') 1498 errx(EX_DATAERR, "invalid ICMP type"); 1499 1500 if (type > 31) 1501 errx(EX_DATAERR, "ICMP type out of range"); 1502 1503 cmd->d[0] |= 1 << type; 1504 } 1505 cmd->o.opcode = O_ICMPTYPE; 1506 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32); 1507 } 1508 1509 static void 1510 print_icmptypes(struct buf_pr *bp, const ipfw_insn_u32 *cmd) 1511 { 1512 int i; 1513 char sep= ' '; 1514 1515 bprintf(bp, " icmptypes"); 1516 for (i = 0; i < 32; i++) { 1517 if ( (cmd->d[0] & (1 << (i))) == 0) 1518 continue; 1519 bprintf(bp, "%c%d", sep, i); 1520 sep = ','; 1521 } 1522 } 1523 1524 static void 1525 print_dscp(struct buf_pr *bp, const ipfw_insn_u32 *cmd) 1526 { 1527 const uint32_t *v; 1528 const char *code; 1529 int i = 0; 1530 char sep= ' '; 1531 1532 bprintf(bp, " dscp"); 1533 v = cmd->d; 1534 while (i < 64) { 1535 if (*v & (1 << i)) { 1536 if ((code = match_value(f_ipdscp, i)) != NULL) 1537 bprintf(bp, "%c%s", sep, code); 1538 else 1539 bprintf(bp, "%c%d", sep, i); 1540 sep = ','; 1541 } 1542 1543 if ((++i % 32) == 0) 1544 v++; 1545 } 1546 } 1547 1548 struct show_state { 1549 struct ip_fw_rule *rule; 1550 const ipfw_insn_kidx *eaction; 1551 uint8_t *printed; 1552 int flags; 1553 #define HAVE_PROTO 0x0001 1554 #define HAVE_SRCIP 0x0002 1555 #define HAVE_DSTIP 0x0004 1556 #define HAVE_PROBE_STATE 0x0008 1557 int proto; 1558 int or_block; 1559 }; 1560 1561 static int 1562 init_show_state(struct show_state *state, struct ip_fw_rule *rule) 1563 { 1564 1565 state->printed = calloc(rule->cmd_len, sizeof(uint8_t)); 1566 if (state->printed == NULL) 1567 return (ENOMEM); 1568 state->rule = rule; 1569 state->eaction = NULL; 1570 state->flags = 0; 1571 state->proto = 0; 1572 state->or_block = 0; 1573 return (0); 1574 } 1575 1576 static void 1577 free_show_state(struct show_state *state) 1578 { 1579 1580 free(state->printed); 1581 } 1582 1583 static uint8_t 1584 is_printed_opcode(struct show_state *state, const ipfw_insn *cmd) 1585 { 1586 1587 return (state->printed[cmd - state->rule->cmd]); 1588 } 1589 1590 static void 1591 mark_printed(struct show_state *state, const ipfw_insn *cmd) 1592 { 1593 1594 state->printed[cmd - state->rule->cmd] = 1; 1595 } 1596 1597 static void 1598 print_limit_mask(struct buf_pr *bp, const ipfw_insn_limit *limit) 1599 { 1600 struct _s_x *p = limit_masks; 1601 char const *comma = " "; 1602 uint8_t x; 1603 1604 for (x = limit->limit_mask; p->x != 0; p++) { 1605 if ((x & p->x) == p->x) { 1606 x &= ~p->x; 1607 bprintf(bp, "%s%s", comma, p->s); 1608 comma = ","; 1609 } 1610 } 1611 bprint_uint_arg(bp, " ", limit->conn_limit); 1612 } 1613 1614 static int 1615 print_instruction(struct buf_pr *bp, const struct format_opts *fo, 1616 struct show_state *state, const ipfw_insn *cmd) 1617 { 1618 struct protoent *pe; 1619 struct passwd *pwd; 1620 struct group *grp; 1621 const char *s; 1622 double d; 1623 1624 if (is_printed_opcode(state, cmd)) 1625 return (0); 1626 if ((cmd->len & F_OR) != 0 && state->or_block == 0) 1627 bprintf(bp, " {"); 1628 if (cmd->opcode != O_IN && (cmd->len & F_NOT) != 0) 1629 bprintf(bp, " not"); 1630 1631 switch (cmd->opcode) { 1632 case O_PROB: 1633 d = 1.0 * insntoc(cmd, u32)->d[0] / 0x7fffffff; 1634 bprintf(bp, "prob %f ", d); 1635 break; 1636 case O_PROBE_STATE: /* no need to print anything here */ 1637 state->flags |= HAVE_PROBE_STATE; 1638 break; 1639 case O_IP_SRC: 1640 case O_IP_SRC_LOOKUP: 1641 case O_IP_SRC_MASK: 1642 case O_IP_SRC_ME: 1643 case O_IP_SRC_SET: 1644 if (state->flags & HAVE_SRCIP) 1645 bprintf(bp, " src-ip"); 1646 print_ip(bp, fo, insntoc(cmd, ip)); 1647 break; 1648 case O_IP_DST: 1649 case O_IP_DST_MASK: 1650 case O_IP_DST_ME: 1651 case O_IP_DST_SET: 1652 case O_IP_DST_LOOKUP: 1653 /* 1654 * Special handling for O_IP_DST_LOOKUP when 1655 * lookup type is not LOOKUP_NONE. 1656 */ 1657 if ((state->flags & HAVE_DSTIP) != 0 && ( 1658 cmd->opcode != O_IP_DST_LOOKUP || 1659 IPFW_LOOKUP_TYPE(cmd) == LOOKUP_NONE)) 1660 bprintf(bp, " dst-ip"); 1661 print_ip(bp, fo, insntoc(cmd, ip)); 1662 break; 1663 case O_IP6_SRC: 1664 case O_IP6_SRC_MASK: 1665 case O_IP6_SRC_ME: 1666 if (state->flags & HAVE_SRCIP) 1667 bprintf(bp, " src-ip6"); 1668 print_ip6(bp, insntoc(cmd, ip6)); 1669 break; 1670 case O_IP6_DST: 1671 case O_IP6_DST_MASK: 1672 case O_IP6_DST_ME: 1673 if (state->flags & HAVE_DSTIP) 1674 bprintf(bp, " dst-ip6"); 1675 print_ip6(bp, insntoc(cmd, ip6)); 1676 break; 1677 case O_MAC_SRC_LOOKUP: 1678 bprintf(bp, " src-mac"); 1679 print_mac_lookup(bp, fo, cmd); 1680 break; 1681 case O_MAC_DST_LOOKUP: 1682 bprintf(bp, " dst-mac"); 1683 print_mac_lookup(bp, fo, cmd); 1684 break; 1685 case O_FLOW6ID: 1686 print_flow6id(bp, insntoc(cmd, u32)); 1687 break; 1688 case O_IP_DSTPORT: 1689 case O_IP_SRCPORT: 1690 print_newports(bp, insntoc(cmd, u16), state->proto, 1691 (state->flags & (HAVE_SRCIP | HAVE_DSTIP)) == 1692 (HAVE_SRCIP | HAVE_DSTIP) ? cmd->opcode: 0); 1693 break; 1694 case O_PROTO: 1695 pe = getprotobynumber(cmd->arg1); 1696 if (state->flags & HAVE_PROTO) 1697 bprintf(bp, " proto"); 1698 if (pe != NULL) 1699 bprintf(bp, " %s", pe->p_name); 1700 else 1701 bprintf(bp, " %u", cmd->arg1); 1702 state->proto = cmd->arg1; 1703 break; 1704 case O_MACADDR2: 1705 print_mac(bp, insntoc(cmd, mac)); 1706 break; 1707 case O_MAC_TYPE: 1708 print_newports(bp, insntoc(cmd, u16), 1709 IPPROTO_ETHERTYPE, cmd->opcode); 1710 break; 1711 case O_FRAG: 1712 print_flags(bp, "frag", cmd, f_ipoff); 1713 break; 1714 case O_FIB: 1715 bprintf(bp, " fib %u", cmd->arg1); 1716 break; 1717 case O_SOCKARG: 1718 bprintf(bp, " sockarg"); 1719 break; 1720 case O_IN: 1721 bprintf(bp, cmd->len & F_NOT ? " out" : " in"); 1722 break; 1723 case O_DIVERTED: 1724 switch (cmd->arg1) { 1725 case 3: 1726 bprintf(bp, " diverted"); 1727 break; 1728 case 2: 1729 bprintf(bp, " diverted-output"); 1730 break; 1731 case 1: 1732 bprintf(bp, " diverted-loopback"); 1733 break; 1734 default: 1735 bprintf(bp, " diverted-?<%u>", cmd->arg1); 1736 break; 1737 } 1738 break; 1739 case O_LAYER2: 1740 bprintf(bp, " layer2"); 1741 break; 1742 case O_XMIT: 1743 case O_RECV: 1744 case O_VIA: 1745 if (cmd->opcode == O_XMIT) 1746 s = "xmit"; 1747 else if (cmd->opcode == O_RECV) 1748 s = "recv"; 1749 else /* if (cmd->opcode == O_VIA) */ 1750 s = "via"; 1751 switch (insntoc(cmd, if)->name[0]) { 1752 case '\0': 1753 bprintf(bp, " %s %s", s, 1754 inet_ntoa(insntoc(cmd, if)->p.ip)); 1755 break; 1756 case '\1': 1757 bprintf(bp, " %s table(%s)", s, 1758 table_search_ctlv(fo->tstate, 1759 insntoc(cmd, if)->p.kidx)); 1760 break; 1761 default: 1762 bprintf(bp, " %s %s", s, 1763 insntoc(cmd, if)->name); 1764 } 1765 break; 1766 case O_IP_FLOW_LOOKUP: 1767 s = table_search_ctlv(fo->tstate, 1768 insntoc(cmd, kidx)->kidx); 1769 bprintf(bp, " flow table(%s", s); 1770 if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_table)) 1771 print_tvalue(bp, insntoc(cmd, table)); 1772 bprintf(bp, ")"); 1773 break; 1774 case O_IPID: 1775 case O_IPTTL: 1776 case O_IPLEN: 1777 case O_TCPDATALEN: 1778 case O_TCPMSS: 1779 case O_TCPWIN: 1780 if (F_LEN(cmd) == 1) { 1781 switch (cmd->opcode) { 1782 case O_IPID: 1783 s = "ipid"; 1784 break; 1785 case O_IPTTL: 1786 s = "ipttl"; 1787 break; 1788 case O_IPLEN: 1789 s = "iplen"; 1790 break; 1791 case O_TCPDATALEN: 1792 s = "tcpdatalen"; 1793 break; 1794 case O_TCPMSS: 1795 s = "tcpmss"; 1796 break; 1797 case O_TCPWIN: 1798 s = "tcpwin"; 1799 break; 1800 default: 1801 s = "<unknown>"; 1802 break; 1803 } 1804 bprintf(bp, " %s %u", s, cmd->arg1); 1805 } else 1806 print_newports(bp, insntoc(cmd, u16), 0, 1807 cmd->opcode); 1808 break; 1809 case O_IPVER: 1810 bprintf(bp, " ipver %u", cmd->arg1); 1811 break; 1812 case O_IPPRECEDENCE: 1813 bprintf(bp, " ipprecedence %u", cmd->arg1 >> 5); 1814 break; 1815 case O_DSCP: 1816 print_dscp(bp, insntoc(cmd, u32)); 1817 break; 1818 case O_IPOPT: 1819 print_flags(bp, "ipoptions", cmd, f_ipopts); 1820 break; 1821 case O_IPTOS: 1822 print_flags(bp, "iptos", cmd, f_iptos); 1823 break; 1824 case O_ICMPTYPE: 1825 print_icmptypes(bp, insntoc(cmd, u32)); 1826 break; 1827 case O_ESTAB: 1828 bprintf(bp, " established"); 1829 break; 1830 case O_TCPFLAGS: 1831 print_flags(bp, "tcpflags", cmd, f_tcpflags); 1832 break; 1833 case O_TCPOPTS: 1834 print_flags(bp, "tcpoptions", cmd, f_tcpopts); 1835 break; 1836 case O_TCPACK: 1837 bprintf(bp, " tcpack %d", 1838 ntohl(insntoc(cmd, u32)->d[0])); 1839 break; 1840 case O_TCPSEQ: 1841 bprintf(bp, " tcpseq %d", 1842 ntohl(insntoc(cmd, u32)->d[0])); 1843 break; 1844 case O_UID: 1845 pwd = getpwuid(insntoc(cmd, u32)->d[0]); 1846 if (pwd != NULL) 1847 bprintf(bp, " uid %s", pwd->pw_name); 1848 else 1849 bprintf(bp, " uid %u", 1850 insntoc(cmd, u32)->d[0]); 1851 break; 1852 case O_GID: 1853 grp = getgrgid(insntoc(cmd, u32)->d[0]); 1854 if (grp != NULL) 1855 bprintf(bp, " gid %s", grp->gr_name); 1856 else 1857 bprintf(bp, " gid %u", 1858 insntoc(cmd, u32)->d[0]); 1859 break; 1860 case O_JAIL: 1861 bprintf(bp, " jail %d", insntoc(cmd, u32)->d[0]); 1862 break; 1863 case O_VERREVPATH: 1864 bprintf(bp, " verrevpath"); 1865 break; 1866 case O_VERSRCREACH: 1867 bprintf(bp, " versrcreach"); 1868 break; 1869 case O_ANTISPOOF: 1870 bprintf(bp, " antispoof"); 1871 break; 1872 case O_IPSEC: 1873 bprintf(bp, " ipsec"); 1874 break; 1875 case O_NOP: 1876 bprintf(bp, " // %s", (const char *)(cmd + 1)); 1877 break; 1878 case O_KEEP_STATE: 1879 if (state->flags & HAVE_PROBE_STATE) 1880 bprintf(bp, " keep-state"); 1881 else 1882 bprintf(bp, " record-state"); 1883 bprintf(bp, " :%s", 1884 object_search_ctlv(fo->tstate, 1885 insntoc(cmd, kidx)->kidx, 1886 IPFW_TLV_STATE_NAME)); 1887 break; 1888 case O_LIMIT: 1889 if (state->flags & HAVE_PROBE_STATE) 1890 bprintf(bp, " limit"); 1891 else 1892 bprintf(bp, " set-limit"); 1893 print_limit_mask(bp, insntoc(cmd, limit)); 1894 bprintf(bp, " :%s", 1895 object_search_ctlv(fo->tstate, 1896 insntoc(cmd, kidx)->kidx, 1897 IPFW_TLV_STATE_NAME)); 1898 break; 1899 case O_IP6: 1900 if (state->flags & HAVE_PROTO) 1901 bprintf(bp, " proto"); 1902 bprintf(bp, " ip6"); 1903 break; 1904 case O_IP4: 1905 if (state->flags & HAVE_PROTO) 1906 bprintf(bp, " proto"); 1907 bprintf(bp, " ip4"); 1908 break; 1909 case O_ICMP6TYPE: 1910 print_icmp6types(bp, insntoc(cmd, u32)); 1911 break; 1912 case O_EXT_HDR: 1913 print_ext6hdr(bp, cmd); 1914 break; 1915 case O_TAGGED: 1916 if (F_LEN(cmd) == 1) 1917 bprint_uint_arg(bp, " tagged ", cmd->arg1); 1918 else 1919 print_newports(bp, insntoc(cmd, u16), 1920 0, O_TAGGED); 1921 break; 1922 case O_SKIP_ACTION: 1923 bprintf(bp, " defer-immediate-action"); 1924 break; 1925 case O_MARK: 1926 bprintf(bp, " mark"); 1927 if (cmd->arg1 == IP_FW_TARG) 1928 bprintf(bp, " tablearg"); 1929 else 1930 bprintf(bp, " %#x", insntoc(cmd, u32)->d[0]); 1931 1932 if (insntoc(cmd, u32)->d[1] != 0xFFFFFFFF) 1933 bprintf(bp, ":%#x", insntoc(cmd, u32)->d[1]); 1934 break; 1935 1936 default: 1937 bprintf(bp, " [opcode %d len %d]", cmd->opcode, 1938 cmd->len); 1939 } 1940 if (cmd->len & F_OR) { 1941 bprintf(bp, " or"); 1942 state->or_block = 1; 1943 } else if (state->or_block != 0) { 1944 bprintf(bp, " }"); 1945 state->or_block = 0; 1946 } 1947 mark_printed(state, cmd); 1948 1949 return (1); 1950 } 1951 1952 static ipfw_insn * 1953 print_opcode(struct buf_pr *bp, struct format_opts *fo, 1954 struct show_state *state, int opcode) 1955 { 1956 ipfw_insn *cmd; 1957 int l; 1958 1959 for (l = state->rule->act_ofs, cmd = state->rule->cmd; 1960 l > 0; l -= F_LEN(cmd), cmd += F_LEN(cmd)) { 1961 /* We use zero opcode to print the rest of options */ 1962 if (opcode >= 0 && cmd->opcode != opcode) 1963 continue; 1964 /* 1965 * Skip O_NOP, when we printing the rest 1966 * of options, it will be handled separately. 1967 */ 1968 if (cmd->opcode == O_NOP && opcode != O_NOP) 1969 continue; 1970 if (!print_instruction(bp, fo, state, cmd)) 1971 continue; 1972 return (cmd); 1973 } 1974 return (NULL); 1975 } 1976 1977 static void 1978 print_fwd(struct buf_pr *bp, const ipfw_insn *cmd) 1979 { 1980 char buf[INET6_ADDRSTRLEN + IF_NAMESIZE + 2]; 1981 const ipfw_insn_sa6 *sa6; 1982 const ipfw_insn_sa *sa; 1983 uint16_t port; 1984 1985 if (cmd->opcode == O_FORWARD_IP) { 1986 sa = insntoc(cmd, sa); 1987 port = sa->sa.sin_port; 1988 if (sa->sa.sin_addr.s_addr == INADDR_ANY) 1989 bprintf(bp, "fwd tablearg"); 1990 else 1991 bprintf(bp, "fwd %s", inet_ntoa(sa->sa.sin_addr)); 1992 } else { 1993 sa6 = insntoc(cmd, sa6); 1994 port = sa6->sa.sin6_port; 1995 bprintf(bp, "fwd "); 1996 if (getnameinfo((const struct sockaddr *)&sa6->sa, 1997 sizeof(struct sockaddr_in6), buf, sizeof(buf), NULL, 0, 1998 NI_NUMERICHOST) == 0) 1999 bprintf(bp, "%s", buf); 2000 } 2001 if (port != 0) 2002 bprintf(bp, ",%u", port); 2003 } 2004 2005 static void 2006 print_logdst(struct buf_pr *bp, uint16_t arg1) 2007 { 2008 char const *comma = ""; 2009 2010 bprintf(bp, " logdst "); 2011 if (arg1 & IPFW_LOG_SYSLOG) { 2012 bprintf(bp, "%ssyslog", comma); 2013 comma = ","; 2014 } 2015 if (arg1 & IPFW_LOG_IPFW0) { 2016 bprintf(bp, "%sipfw0", comma); 2017 comma = ","; 2018 } 2019 if (arg1 & IPFW_LOG_RTSOCK) { 2020 bprintf(bp, "%srtsock", comma); 2021 comma = ","; 2022 } 2023 } 2024 2025 static int 2026 print_action_instruction(struct buf_pr *bp, const struct format_opts *fo, 2027 struct show_state *state, const ipfw_insn *cmd) 2028 { 2029 const char *s; 2030 2031 if (is_printed_opcode(state, cmd)) 2032 return (0); 2033 switch (cmd->opcode) { 2034 case O_CHECK_STATE: 2035 bprintf(bp, "check-state"); 2036 if (insntoc(cmd, kidx)->kidx != 0) 2037 s = object_search_ctlv(fo->tstate, 2038 insntoc(cmd, kidx)->kidx, 2039 IPFW_TLV_STATE_NAME); 2040 else 2041 s = NULL; 2042 bprintf(bp, " :%s", s ? s: "any"); 2043 break; 2044 case O_ACCEPT: 2045 bprintf(bp, "allow"); 2046 break; 2047 case O_COUNT: 2048 bprintf(bp, "count"); 2049 break; 2050 case O_DENY: 2051 bprintf(bp, "deny"); 2052 break; 2053 case O_REJECT: 2054 if (cmd->arg1 == ICMP_REJECT_RST) 2055 bprintf(bp, "reset"); 2056 else if (cmd->arg1 == ICMP_REJECT_ABORT) 2057 bprintf(bp, "abort"); 2058 else if (cmd->arg1 == ICMP_UNREACH_HOST) 2059 bprintf(bp, "reject"); 2060 else if (cmd->arg1 == ICMP_UNREACH_NEEDFRAG && 2061 cmd->len == F_INSN_SIZE(ipfw_insn_u16)) 2062 bprintf(bp, "needfrag %u", 2063 insntoc(cmd, u16)->ports[0]); 2064 else 2065 print_reject_code(bp, cmd->arg1); 2066 break; 2067 case O_UNREACH6: 2068 if (cmd->arg1 == ICMP6_UNREACH_RST) 2069 bprintf(bp, "reset6"); 2070 else if (cmd->arg1 == ICMP6_UNREACH_ABORT) 2071 bprintf(bp, "abort6"); 2072 else 2073 print_unreach6_code(bp, cmd->arg1); 2074 break; 2075 case O_SKIPTO: 2076 bprint_uint_arg(bp, "skipto ", insntoc(cmd, u32)->d[0]); 2077 break; 2078 case O_PIPE: 2079 bprint_uint_arg(bp, "pipe ", cmd->arg1); 2080 break; 2081 case O_QUEUE: 2082 bprint_uint_arg(bp, "queue ", cmd->arg1); 2083 break; 2084 case O_DIVERT: 2085 bprint_uint_arg(bp, "divert ", cmd->arg1); 2086 break; 2087 case O_TEE: 2088 bprint_uint_arg(bp, "tee ", cmd->arg1); 2089 break; 2090 case O_NETGRAPH: 2091 bprint_uint_arg(bp, "netgraph ", cmd->arg1); 2092 break; 2093 case O_NGTEE: 2094 bprint_uint_arg(bp, "ngtee ", cmd->arg1); 2095 break; 2096 case O_FORWARD_IP: 2097 case O_FORWARD_IP6: 2098 print_fwd(bp, cmd); 2099 break; 2100 case O_LOG: 2101 bprintf(bp, " log"); 2102 if (insntoc(cmd, log)->max_log > 0) 2103 bprintf(bp, " logamount %d", 2104 insntoc(cmd, log)->max_log); 2105 if (cmd->arg1 != IPFW_LOG_DEFAULT) 2106 print_logdst(bp, cmd->arg1); 2107 break; 2108 case O_ALTQ: 2109 #ifndef NO_ALTQ 2110 print_altq_cmd(bp, insntoc(cmd, altq)); 2111 #endif 2112 break; 2113 case O_TAG: 2114 bprint_uint_arg(bp, cmd->len & F_NOT ? " untag ": 2115 " tag ", cmd->arg1); 2116 break; 2117 case O_NAT: 2118 if (cmd->arg1 != IP_FW_NAT44_GLOBAL) 2119 bprint_uint_arg(bp, "nat ", cmd->arg1); 2120 else 2121 bprintf(bp, "nat global"); 2122 break; 2123 case O_SETFIB: 2124 if (cmd->arg1 == IP_FW_TARG) 2125 bprint_uint_arg(bp, "setfib ", cmd->arg1); 2126 else 2127 bprintf(bp, "setfib %u", cmd->arg1 & 0x7FFF); 2128 break; 2129 case O_EXTERNAL_ACTION: 2130 /* 2131 * The external action can consists of two following 2132 * each other opcodes - O_EXTERNAL_ACTION and 2133 * O_EXTERNAL_INSTANCE. The first contains the ID of 2134 * name of external action. The second contains the ID 2135 * of name of external action instance. 2136 * NOTE: in case when external action has no named 2137 * instances support, the second opcode isn't needed. 2138 */ 2139 state->eaction = insntoc(cmd, kidx); 2140 s = object_search_ctlv(fo->tstate, 2141 state->eaction->kidx, 2142 IPFW_TLV_EACTION); 2143 if (match_token(rule_eactions, s) != -1) 2144 bprintf(bp, "%s", s); 2145 else 2146 bprintf(bp, "eaction %s", s); 2147 break; 2148 case O_EXTERNAL_INSTANCE: 2149 if (state->eaction == NULL) 2150 break; 2151 /* 2152 * XXX: we need to teach ipfw(9) to rewrite opcodes 2153 * in the user buffer on rule addition. When we add 2154 * the rule, we specify zero TLV type for 2155 * O_EXTERNAL_INSTANCE object. To show correct 2156 * rule after `ipfw add` we need to search instance 2157 * name with zero type. But when we do `ipfw show` 2158 * we calculate TLV type using IPFW_TLV_EACTION_NAME() 2159 * macro. 2160 */ 2161 s = object_search_ctlv(fo->tstate, 2162 insntoc(cmd, kidx)->kidx, 0); 2163 if (s == NULL) 2164 s = object_search_ctlv(fo->tstate, 2165 insntoc(cmd, kidx)->kidx, IPFW_TLV_EACTION_NAME( 2166 state->eaction->kidx)); 2167 bprintf(bp, " %s", s); 2168 break; 2169 case O_EXTERNAL_DATA: 2170 if (state->eaction == NULL) 2171 break; 2172 /* 2173 * Currently we support data formatting only for 2174 * external data with datalen u16. For unknown data 2175 * print its size in bytes. 2176 */ 2177 if (cmd->len == F_INSN_SIZE(ipfw_insn)) 2178 bprintf(bp, " %u", cmd->arg1); 2179 else 2180 bprintf(bp, " %ubytes", 2181 (unsigned)(cmd->len * sizeof(uint32_t))); 2182 break; 2183 case O_SETDSCP: 2184 if (cmd->arg1 == IP_FW_TARG) { 2185 bprintf(bp, "setdscp tablearg"); 2186 break; 2187 } 2188 s = match_value(f_ipdscp, cmd->arg1 & 0x3F); 2189 if (s != NULL) 2190 bprintf(bp, "setdscp %s", s); 2191 else 2192 bprintf(bp, "setdscp %u", cmd->arg1 & 0x3F); 2193 break; 2194 case O_REASS: 2195 bprintf(bp, "reass"); 2196 break; 2197 case O_CALLRETURN: 2198 if (cmd->len & F_NOT) { 2199 s = match_value(return_types, cmd->arg1); 2200 bprintf(bp, "return %s", s ? s: "<invalid>"); 2201 } else 2202 bprint_uint_arg(bp, "call ", insntoc(cmd, u32)->d[0]); 2203 break; 2204 case O_SETMARK: 2205 if (cmd->arg1 == IP_FW_TARG) { 2206 bprintf(bp, "setmark tablearg"); 2207 break; 2208 } 2209 bprintf(bp, "setmark %#x", insntoc(cmd, u32)->d[0]); 2210 break; 2211 default: 2212 bprintf(bp, "** unrecognized action %d len %d ", 2213 cmd->opcode, cmd->len); 2214 } 2215 mark_printed(state, cmd); 2216 2217 return (1); 2218 } 2219 2220 2221 static ipfw_insn * 2222 print_action(struct buf_pr *bp, struct format_opts *fo, 2223 struct show_state *state, uint8_t opcode) 2224 { 2225 ipfw_insn *cmd; 2226 int l; 2227 2228 for (l = state->rule->cmd_len - state->rule->act_ofs, 2229 cmd = ACTION_PTR(state->rule); l > 0; 2230 l -= F_LEN(cmd), cmd += F_LEN(cmd)) { 2231 if (cmd->opcode != opcode) 2232 continue; 2233 if (!print_action_instruction(bp, fo, state, cmd)) 2234 continue; 2235 return (cmd); 2236 } 2237 return (NULL); 2238 } 2239 2240 static void 2241 print_proto(struct buf_pr *bp, struct format_opts *fo, 2242 struct show_state *state) 2243 { 2244 ipfw_insn *cmd; 2245 int l, proto, ip4, ip6; 2246 2247 /* Count all O_PROTO, O_IP4, O_IP6 instructions. */ 2248 proto = ip4 = ip6 = 0; 2249 for (l = state->rule->act_ofs, cmd = state->rule->cmd; 2250 l > 0; l -= F_LEN(cmd), cmd += F_LEN(cmd)) { 2251 switch (cmd->opcode) { 2252 case O_PROTO: 2253 proto++; 2254 break; 2255 case O_IP4: 2256 ip4 = 1; 2257 if (cmd->len & F_OR) 2258 ip4++; 2259 break; 2260 case O_IP6: 2261 ip6 = 1; 2262 if (cmd->len & F_OR) 2263 ip6++; 2264 break; 2265 default: 2266 continue; 2267 } 2268 } 2269 if (proto == 0 && ip4 == 0 && ip6 == 0) { 2270 state->proto = IPPROTO_IP; 2271 state->flags |= HAVE_PROTO; 2272 bprintf(bp, " ip"); 2273 return; 2274 } 2275 /* To handle the case { ip4 or ip6 }, print opcode with F_OR first */ 2276 cmd = NULL; 2277 if (ip4 || ip6) 2278 cmd = print_opcode(bp, fo, state, ip4 > ip6 ? O_IP4: O_IP6); 2279 if (cmd != NULL && (cmd->len & F_OR)) 2280 cmd = print_opcode(bp, fo, state, ip4 > ip6 ? O_IP6: O_IP4); 2281 if (cmd == NULL || (cmd->len & F_OR)) 2282 for (l = proto; l > 0; l--) { 2283 cmd = print_opcode(bp, fo, state, O_PROTO); 2284 if (cmd == NULL || (cmd->len & F_OR) == 0) 2285 break; 2286 } 2287 /* Initialize proto, it is used by print_newports() */ 2288 state->flags |= HAVE_PROTO; 2289 if (state->proto == 0 && ip6 != 0) 2290 state->proto = IPPROTO_IPV6; 2291 } 2292 2293 static int 2294 match_opcode(int opcode, const int opcodes[], size_t nops) 2295 { 2296 size_t i; 2297 2298 for (i = 0; i < nops; i++) 2299 if (opcode == opcodes[i]) 2300 return (1); 2301 return (0); 2302 } 2303 2304 static void 2305 print_address(struct buf_pr *bp, struct format_opts *fo, 2306 struct show_state *state, const int opcodes[], size_t nops, int portop, 2307 int flag) 2308 { 2309 ipfw_insn *cmd; 2310 int count, l, portcnt, pf; 2311 2312 count = portcnt = 0; 2313 for (l = state->rule->act_ofs, cmd = state->rule->cmd; 2314 l > 0; l -= F_LEN(cmd), cmd += F_LEN(cmd)) { 2315 if (match_opcode(cmd->opcode, opcodes, nops)) { 2316 /* 2317 * Special handling for O_IP_DST_LOOKUP when 2318 * lookup type is not LOOKUP_NONE. 2319 */ 2320 if (cmd->opcode == O_IP_DST_LOOKUP && 2321 IPFW_LOOKUP_TYPE(cmd) != LOOKUP_NONE) 2322 continue; 2323 count++; 2324 } else if (cmd->opcode == portop) 2325 portcnt++; 2326 } 2327 if (count == 0) 2328 bprintf(bp, " any"); 2329 for (l = state->rule->act_ofs, cmd = state->rule->cmd; 2330 l > 0 && count > 0; l -= F_LEN(cmd), cmd += F_LEN(cmd)) { 2331 if (!match_opcode(cmd->opcode, opcodes, nops)) 2332 continue; 2333 print_instruction(bp, fo, state, cmd); 2334 if ((cmd->len & F_OR) == 0) 2335 break; 2336 count--; 2337 } 2338 /* 2339 * If several O_IP_?PORT opcodes specified, leave them to the 2340 * options section. 2341 */ 2342 if (portcnt == 1) { 2343 for (l = state->rule->act_ofs, cmd = state->rule->cmd, pf = 0; 2344 l > 0; l -= F_LEN(cmd), cmd += F_LEN(cmd)) { 2345 if (cmd->opcode != portop) { 2346 pf = (cmd->len & F_OR); 2347 continue; 2348 } 2349 /* Print opcode iff it is not in OR block. */ 2350 if (pf == 0 && (cmd->len & F_OR) == 0) 2351 print_instruction(bp, fo, state, cmd); 2352 break; 2353 } 2354 } 2355 state->flags |= flag; 2356 } 2357 2358 static const int action_opcodes[] = { 2359 O_CHECK_STATE, O_ACCEPT, O_COUNT, O_DENY, O_REJECT, 2360 O_UNREACH6, O_SKIPTO, O_PIPE, O_QUEUE, O_DIVERT, O_TEE, 2361 O_NETGRAPH, O_NGTEE, O_FORWARD_IP, O_FORWARD_IP6, O_NAT, 2362 O_SETFIB, O_SETDSCP, O_REASS, O_CALLRETURN, O_SETMARK, 2363 /* keep the following opcodes at the end of the list */ 2364 O_EXTERNAL_ACTION, O_EXTERNAL_INSTANCE, O_EXTERNAL_DATA 2365 }; 2366 2367 static const int modifier_opcodes[] = { 2368 O_LOG, O_ALTQ, O_TAG 2369 }; 2370 2371 static const int src_opcodes[] = { 2372 O_IP_SRC, O_IP_SRC_LOOKUP, O_IP_SRC_MASK, O_IP_SRC_ME, 2373 O_IP_SRC_SET, O_IP6_SRC, O_IP6_SRC_MASK, O_IP6_SRC_ME 2374 }; 2375 2376 static const int dst_opcodes[] = { 2377 O_IP_DST, O_IP_DST_LOOKUP, O_IP_DST_MASK, O_IP_DST_ME, 2378 O_IP_DST_SET, O_IP6_DST, O_IP6_DST_MASK, O_IP6_DST_ME 2379 }; 2380 2381 #if IPFW_DEFAULT_RULE > 65535 2382 #define RULENUM_FORMAT "%06d" 2383 #else 2384 #define RULENUM_FORMAT "%05d" 2385 #endif 2386 2387 static void 2388 show_static_rule(struct cmdline_opts *co, struct format_opts *fo, 2389 struct buf_pr *bp, struct ip_fw_rule *rule, struct ip_fw_bcounter *cntr) 2390 { 2391 static int twidth = 0; 2392 struct show_state state; 2393 ipfw_insn *cmd; 2394 size_t i; 2395 2396 /* Print # DISABLED or skip the rule */ 2397 if ((fo->set_mask & (1 << rule->set)) == 0) { 2398 /* disabled mask */ 2399 if (!co->show_sets) 2400 return; 2401 else 2402 bprintf(bp, "# DISABLED "); 2403 } 2404 if (init_show_state(&state, rule) != 0) { 2405 warn("init_show_state() failed"); 2406 return; 2407 } 2408 2409 bprintf(bp, RULENUM_FORMAT " ", rule->rulenum); 2410 2411 /* only if counters are available */ 2412 if (cntr != NULL) { 2413 /* Print counters if enabled */ 2414 if (fo->pcwidth > 0 || fo->bcwidth > 0) { 2415 pr_u64(bp, &cntr->pcnt, fo->pcwidth); 2416 pr_u64(bp, &cntr->bcnt, fo->bcwidth); 2417 } 2418 2419 /* Print timestamp */ 2420 if (co->do_time == TIMESTAMP_NUMERIC) 2421 bprintf(bp, "%10u ", cntr->timestamp); 2422 else if (co->do_time == TIMESTAMP_STRING) { 2423 char timestr[30]; 2424 time_t t = (time_t)0; 2425 2426 if (twidth == 0) { 2427 strcpy(timestr, ctime(&t)); 2428 *strchr(timestr, '\n') = '\0'; 2429 twidth = strlen(timestr); 2430 } 2431 if (cntr->timestamp > 0) { 2432 t = _long_to_time(cntr->timestamp); 2433 2434 strcpy(timestr, ctime(&t)); 2435 *strchr(timestr, '\n') = '\0'; 2436 bprintf(bp, "%s ", timestr); 2437 } else { 2438 bprintf(bp, "%*s ", twidth, ""); 2439 } 2440 } 2441 } 2442 2443 /* Print set number */ 2444 if (co->show_sets) 2445 bprintf(bp, "set %d ", rule->set); 2446 2447 /* Print the optional "match probability" */ 2448 cmd = print_opcode(bp, fo, &state, O_PROB); 2449 /* Print rule action */ 2450 for (i = 0; i < nitems(action_opcodes); i++) { 2451 cmd = print_action(bp, fo, &state, action_opcodes[i]); 2452 if (cmd == NULL) 2453 continue; 2454 /* Handle special cases */ 2455 switch (cmd->opcode) { 2456 case O_CHECK_STATE: 2457 goto end; 2458 case O_EXTERNAL_ACTION: 2459 case O_EXTERNAL_INSTANCE: 2460 /* External action can have several instructions */ 2461 continue; 2462 } 2463 break; 2464 } 2465 /* Print rule modifiers */ 2466 for (i = 0; i < nitems(modifier_opcodes); i++) 2467 print_action(bp, fo, &state, modifier_opcodes[i]); 2468 /* 2469 * Print rule body 2470 */ 2471 if (co->comment_only != 0) 2472 goto end; 2473 2474 if (rule->flags & IPFW_RULE_JUSTOPTS) { 2475 state.flags |= HAVE_PROTO | HAVE_SRCIP | HAVE_DSTIP; 2476 /* 2477 * Print `proto ip` if all opcodes has been already printed. 2478 */ 2479 if (memchr(state.printed, 0, rule->act_ofs) == NULL) { 2480 bprintf(bp, " proto ip"); 2481 goto end; 2482 } 2483 goto justopts; 2484 } 2485 2486 print_proto(bp, fo, &state); 2487 if (co->do_compact != 0 && (rule->flags & IPFW_RULE_NOOPT)) 2488 goto justopts; 2489 2490 /* Print source */ 2491 bprintf(bp, " from"); 2492 print_address(bp, fo, &state, src_opcodes, nitems(src_opcodes), 2493 O_IP_SRCPORT, HAVE_SRCIP); 2494 2495 /* Print destination */ 2496 bprintf(bp, " to"); 2497 print_address(bp, fo, &state, dst_opcodes, nitems(dst_opcodes), 2498 O_IP_DSTPORT, HAVE_DSTIP); 2499 2500 justopts: 2501 /* Print the rest of options */ 2502 while (print_opcode(bp, fo, &state, -1)) 2503 ; 2504 end: 2505 /* Print comment at the end */ 2506 cmd = print_opcode(bp, fo, &state, O_NOP); 2507 if (co->comment_only != 0 && cmd == NULL) 2508 bprintf(bp, " // ..."); 2509 bprintf(bp, "\n"); 2510 free_show_state(&state); 2511 } 2512 2513 static void 2514 show_dyn_state(struct cmdline_opts *co, struct format_opts *fo, 2515 struct buf_pr *bp, ipfw_dyn_rule *d) 2516 { 2517 struct protoent *pe; 2518 struct in_addr a; 2519 char buf[INET6_ADDRSTRLEN]; 2520 2521 if (!d->expire && !(d->type == O_LIMIT_PARENT)) 2522 return; 2523 2524 bprintf(bp, RULENUM_FORMAT, d->rulenum); 2525 if (fo->pcwidth > 0 || fo->bcwidth > 0) { 2526 bprintf(bp, " "); 2527 pr_u64(bp, &d->pcnt, fo->pcwidth); 2528 pr_u64(bp, &d->bcnt, fo->bcwidth); 2529 bprintf(bp, "(%ds)", d->expire); 2530 } 2531 switch (d->type) { 2532 case O_LIMIT_PARENT: 2533 bprintf(bp, " PARENT %u", d->count); 2534 break; 2535 case O_LIMIT: 2536 bprintf(bp, " LIMIT"); 2537 break; 2538 case O_KEEP_STATE: /* bidir, no mask */ 2539 bprintf(bp, " STATE"); 2540 break; 2541 } 2542 2543 if ((pe = getprotobynumber(d->id.proto)) != NULL) 2544 bprintf(bp, " %s", pe->p_name); 2545 else 2546 bprintf(bp, " proto %u", d->id.proto); 2547 2548 if (d->id.addr_type == 4) { 2549 a.s_addr = htonl(d->id.src_ip); 2550 bprintf(bp, " %s %d", inet_ntoa(a), d->id.src_port); 2551 2552 a.s_addr = htonl(d->id.dst_ip); 2553 bprintf(bp, " <-> %s %d", inet_ntoa(a), d->id.dst_port); 2554 } else if (d->id.addr_type == 6) { 2555 bprintf(bp, " %s %d", inet_ntop(AF_INET6, &d->id.src_ip6, buf, 2556 sizeof(buf)), d->id.src_port); 2557 bprintf(bp, " <-> %s %d", inet_ntop(AF_INET6, &d->id.dst_ip6, 2558 buf, sizeof(buf)), d->id.dst_port); 2559 } else 2560 bprintf(bp, " UNKNOWN <-> UNKNOWN"); 2561 if (d->kidx != 0) 2562 bprintf(bp, " :%s", object_search_ctlv(fo->tstate, 2563 d->kidx, IPFW_TLV_STATE_NAME)); 2564 2565 #define BOTH_SYN (TH_SYN | (TH_SYN << 8)) 2566 #define BOTH_FIN (TH_FIN | (TH_FIN << 8)) 2567 if (co->verbose) { 2568 bprintf(bp, " state 0x%08x%s", d->state, 2569 d->state ? " ": ","); 2570 if (d->state & IPFW_DYN_ORPHANED) 2571 bprintf(bp, "ORPHANED,"); 2572 if ((d->state & BOTH_SYN) == BOTH_SYN) 2573 bprintf(bp, "BOTH_SYN,"); 2574 else { 2575 if (d->state & TH_SYN) 2576 bprintf(bp, "F_SYN,"); 2577 if (d->state & (TH_SYN << 8)) 2578 bprintf(bp, "R_SYN,"); 2579 } 2580 if ((d->state & BOTH_FIN) == BOTH_FIN) 2581 bprintf(bp, "BOTH_FIN,"); 2582 else { 2583 if (d->state & TH_FIN) 2584 bprintf(bp, "F_FIN,"); 2585 if (d->state & (TH_FIN << 8)) 2586 bprintf(bp, "R_FIN,"); 2587 } 2588 bprintf(bp, " f_ack 0x%x, r_ack 0x%x", d->ack_fwd, 2589 d->ack_rev); 2590 } 2591 } 2592 2593 static int 2594 do_range_cmd(int cmd, ipfw_range_tlv *rt) 2595 { 2596 ipfw_range_header rh; 2597 size_t sz; 2598 2599 memset(&rh, 0, sizeof(rh)); 2600 memcpy(&rh.range, rt, sizeof(*rt)); 2601 rh.range.head.length = sizeof(*rt); 2602 rh.range.head.type = IPFW_TLV_RANGE; 2603 sz = sizeof(rh); 2604 2605 if (do_get3(cmd, &rh.opheader, &sz) != 0) 2606 return (-1); 2607 /* Save number of matched objects */ 2608 rt->new_set = rh.range.new_set; 2609 return (0); 2610 } 2611 2612 /* 2613 * This one handles all set-related commands 2614 * ipfw set { show | enable | disable } 2615 * ipfw set swap X Y 2616 * ipfw set move X to Y 2617 * ipfw set move rule X to Y 2618 */ 2619 void 2620 ipfw_sets_handler(char *av[]) 2621 { 2622 ipfw_range_tlv rt; 2623 const char *msg; 2624 size_t size; 2625 uint32_t masks[2], rulenum; 2626 int i; 2627 uint8_t cmd; 2628 2629 av++; 2630 memset(&rt, 0, sizeof(rt)); 2631 2632 if (av[0] == NULL) 2633 errx(EX_USAGE, "set needs command"); 2634 if (_substrcmp(*av, "show") == 0) { 2635 struct format_opts fo; 2636 ipfw_cfg_lheader *cfg; 2637 2638 memset(&fo, 0, sizeof(fo)); 2639 if (ipfw_get_config(&g_co, &fo, &cfg, &size) != 0) 2640 err(EX_OSERR, "requesting config failed"); 2641 2642 for (i = 0, msg = "disable"; i < RESVD_SET; i++) 2643 if ((cfg->set_mask & (1<<i)) == 0) { 2644 printf("%s %d", msg, i); 2645 msg = ""; 2646 } 2647 msg = (cfg->set_mask != (uint32_t)-1) ? " enable" : "enable"; 2648 for (i = 0; i < RESVD_SET; i++) 2649 if ((cfg->set_mask & (1<<i)) != 0) { 2650 printf("%s %d", msg, i); 2651 msg = ""; 2652 } 2653 printf("\n"); 2654 free(cfg); 2655 } else if (_substrcmp(*av, "swap") == 0) { 2656 av++; 2657 if ( av[0] == NULL || av[1] == NULL ) 2658 errx(EX_USAGE, "set swap needs 2 set numbers\n"); 2659 rt.set = atoi(av[0]); 2660 rt.new_set = atoi(av[1]); 2661 if (!isdigit(*(av[0])) || rt.set > RESVD_SET) 2662 errx(EX_DATAERR, "invalid set number %s\n", av[0]); 2663 if (!isdigit(*(av[1])) || rt.new_set > RESVD_SET) 2664 errx(EX_DATAERR, "invalid set number %s\n", av[1]); 2665 i = do_range_cmd(IP_FW_SET_SWAP, &rt); 2666 } else if (_substrcmp(*av, "move") == 0) { 2667 av++; 2668 if (av[0] && _substrcmp(*av, "rule") == 0) { 2669 rt.flags = IPFW_RCFLAG_RANGE; /* move rules to new set */ 2670 cmd = IP_FW_XMOVE; 2671 av++; 2672 } else 2673 cmd = IP_FW_SET_MOVE; /* Move set to new one */ 2674 if (av[0] == NULL || av[1] == NULL || av[2] == NULL || 2675 av[3] != NULL || _substrcmp(av[1], "to") != 0) 2676 errx(EX_USAGE, "syntax: set move [rule] X to Y\n"); 2677 rulenum = (uint32_t)strtoul(av[0], NULL, 10); 2678 rt.new_set = atoi(av[2]); 2679 if (cmd == IP_FW_XMOVE) { 2680 rt.start_rule = rulenum; 2681 rt.end_rule = rulenum; 2682 } else 2683 rt.set = rulenum; 2684 rt.new_set = atoi(av[2]); 2685 if (!isdigit(*(av[0])) || (cmd == 3 && rt.set > RESVD_SET) || 2686 (cmd == 2 && rt.start_rule == IPFW_DEFAULT_RULE) ) 2687 errx(EX_DATAERR, "invalid source number %s\n", av[0]); 2688 if (!isdigit(*(av[2])) || rt.new_set > RESVD_SET) 2689 errx(EX_DATAERR, "invalid dest. set %s\n", av[1]); 2690 i = do_range_cmd(cmd, &rt); 2691 if (i < 0) 2692 err(EX_OSERR, "failed to move %s", 2693 cmd == IP_FW_SET_MOVE ? "set": "rule"); 2694 } else if (_substrcmp(*av, "disable") == 0 || 2695 _substrcmp(*av, "enable") == 0 ) { 2696 int which = _substrcmp(*av, "enable") == 0 ? 1 : 0; 2697 2698 av++; 2699 masks[0] = masks[1] = 0; 2700 2701 while (av[0]) { 2702 if (isdigit(**av)) { 2703 i = atoi(*av); 2704 if (i < 0 || i > RESVD_SET) 2705 errx(EX_DATAERR, 2706 "invalid set number %d\n", i); 2707 masks[which] |= (1<<i); 2708 } else if (_substrcmp(*av, "disable") == 0) 2709 which = 0; 2710 else if (_substrcmp(*av, "enable") == 0) 2711 which = 1; 2712 else 2713 errx(EX_DATAERR, 2714 "invalid set command %s\n", *av); 2715 av++; 2716 } 2717 if ( (masks[0] & masks[1]) != 0 ) 2718 errx(EX_DATAERR, 2719 "cannot enable and disable the same set\n"); 2720 2721 rt.set = masks[0]; 2722 rt.new_set = masks[1]; 2723 i = do_range_cmd(IP_FW_SET_ENABLE, &rt); 2724 if (i) 2725 warn("set enable/disable: setsockopt(IP_FW_SET_ENABLE)"); 2726 } else 2727 errx(EX_USAGE, "invalid set command %s\n", *av); 2728 } 2729 2730 static void 2731 manage_skipto_cache(int op) 2732 { 2733 ipfw_cmd_header req; 2734 2735 memset(&req, 0, sizeof(req)); 2736 req.size = sizeof(req); 2737 req.cmd = op ? SKIPTO_CACHE_ENABLE : SKIPTO_CACHE_DISABLE; 2738 2739 do_set3(IP_FW_SKIPTO_CACHE, &req.opheader, sizeof(req)); 2740 } 2741 2742 void 2743 ipfw_sysctl_handler(char *av[], int which) 2744 { 2745 av++; 2746 2747 if (av[0] == NULL) { 2748 warnx("missing keyword to enable/disable\n"); 2749 } else if (_substrcmp(*av, "firewall") == 0) { 2750 sysctlbyname("net.inet.ip.fw.enable", NULL, 0, 2751 &which, sizeof(which)); 2752 sysctlbyname("net.inet6.ip6.fw.enable", NULL, 0, 2753 &which, sizeof(which)); 2754 } else if (_substrcmp(*av, "one_pass") == 0) { 2755 sysctlbyname("net.inet.ip.fw.one_pass", NULL, 0, 2756 &which, sizeof(which)); 2757 } else if (_substrcmp(*av, "debug") == 0) { 2758 sysctlbyname("net.inet.ip.fw.debug", NULL, 0, 2759 &which, sizeof(which)); 2760 } else if (_substrcmp(*av, "verbose") == 0) { 2761 sysctlbyname("net.inet.ip.fw.verbose", NULL, 0, 2762 &which, sizeof(which)); 2763 } else if (_substrcmp(*av, "dyn_keepalive") == 0) { 2764 sysctlbyname("net.inet.ip.fw.dyn_keepalive", NULL, 0, 2765 &which, sizeof(which)); 2766 } else if (_substrcmp(*av, "skipto_cache") == 0) { 2767 manage_skipto_cache(which); 2768 #ifndef NO_ALTQ 2769 } else if (_substrcmp(*av, "altq") == 0) { 2770 altq_set_enabled(which); 2771 #endif 2772 } else { 2773 warnx("unrecognize enable/disable keyword: %s\n", *av); 2774 } 2775 } 2776 2777 typedef void state_cb(struct cmdline_opts *co, struct format_opts *fo, 2778 void *arg, void *state); 2779 2780 static void 2781 prepare_format_dyn(struct cmdline_opts *co, struct format_opts *fo, 2782 void *arg __unused, void *_state) 2783 { 2784 ipfw_dyn_rule *d; 2785 int width; 2786 2787 d = (ipfw_dyn_rule *)_state; 2788 /* Count _ALL_ states */ 2789 fo->dcnt++; 2790 2791 if (fo->show_counters == 0) 2792 return; 2793 2794 /* skip states from another set */ 2795 if (co->use_set != 0 && d->set != co->use_set - 1) 2796 return; 2797 2798 width = pr_u64(NULL, &d->pcnt, 0); 2799 if (width > fo->pcwidth) 2800 fo->pcwidth = width; 2801 2802 width = pr_u64(NULL, &d->bcnt, 0); 2803 if (width > fo->bcwidth) 2804 fo->bcwidth = width; 2805 } 2806 2807 static int 2808 foreach_state(struct cmdline_opts *co, struct format_opts *fo, 2809 caddr_t base, size_t sz, state_cb dyn_bc, void *dyn_arg) 2810 { 2811 int ttype; 2812 state_cb *fptr; 2813 void *farg; 2814 ipfw_obj_tlv *tlv; 2815 ipfw_obj_ctlv *ctlv; 2816 2817 fptr = NULL; 2818 ttype = 0; 2819 2820 while (sz > 0) { 2821 ctlv = (ipfw_obj_ctlv *)base; 2822 switch (ctlv->head.type) { 2823 case IPFW_TLV_DYNSTATE_LIST: 2824 base += sizeof(*ctlv); 2825 sz -= sizeof(*ctlv); 2826 ttype = IPFW_TLV_DYN_ENT; 2827 fptr = dyn_bc; 2828 farg = dyn_arg; 2829 break; 2830 default: 2831 return (sz); 2832 } 2833 2834 while (sz > 0) { 2835 tlv = (ipfw_obj_tlv *)base; 2836 if (tlv->type != ttype) 2837 break; 2838 2839 fptr(co, fo, farg, tlv + 1); 2840 sz -= tlv->length; 2841 base += tlv->length; 2842 } 2843 } 2844 2845 return (sz); 2846 } 2847 2848 static void 2849 prepare_format_opts(struct cmdline_opts *co, struct format_opts *fo, 2850 ipfw_obj_tlv *rtlv, int rcnt, caddr_t dynbase, size_t dynsz) 2851 { 2852 int bcwidth, pcwidth, width; 2853 int n; 2854 struct ip_fw_bcounter *cntr; 2855 struct ip_fw_rule *r; 2856 2857 bcwidth = 0; 2858 pcwidth = 0; 2859 if (fo->show_counters != 0) { 2860 for (n = 0; n < rcnt; n++, 2861 rtlv = (ipfw_obj_tlv *)((caddr_t)rtlv + rtlv->length)) { 2862 cntr = (struct ip_fw_bcounter *)(rtlv + 1); 2863 r = (struct ip_fw_rule *)((caddr_t)cntr + cntr->size); 2864 /* skip rules from another set */ 2865 if (co->use_set && r->set != co->use_set - 1) 2866 continue; 2867 2868 /* packet counter */ 2869 width = pr_u64(NULL, &cntr->pcnt, 0); 2870 if (width > pcwidth) 2871 pcwidth = width; 2872 2873 /* byte counter */ 2874 width = pr_u64(NULL, &cntr->bcnt, 0); 2875 if (width > bcwidth) 2876 bcwidth = width; 2877 } 2878 } 2879 fo->bcwidth = bcwidth; 2880 fo->pcwidth = pcwidth; 2881 2882 fo->dcnt = 0; 2883 if (co->do_dynamic && dynsz > 0) 2884 foreach_state(co, fo, dynbase, dynsz, prepare_format_dyn, NULL); 2885 } 2886 2887 static int 2888 list_static_range(struct cmdline_opts *co, struct format_opts *fo, 2889 struct buf_pr *bp, ipfw_obj_tlv *rtlv, int rcnt) 2890 { 2891 int n, seen; 2892 struct ip_fw_rule *r; 2893 struct ip_fw_bcounter *cntr; 2894 2895 for (n = seen = 0; n < rcnt; n++, 2896 rtlv = (ipfw_obj_tlv *)((caddr_t)rtlv + rtlv->length)) { 2897 2898 if ((fo->show_counters | fo->show_time) != 0) { 2899 cntr = (struct ip_fw_bcounter *)(rtlv + 1); 2900 r = (struct ip_fw_rule *)((caddr_t)cntr + cntr->size); 2901 } else { 2902 cntr = NULL; 2903 r = (struct ip_fw_rule *)(rtlv + 1); 2904 } 2905 if (r->rulenum > fo->last) 2906 break; 2907 if (co->use_set && r->set != co->use_set - 1) 2908 continue; 2909 if (r->rulenum >= fo->first && r->rulenum <= fo->last) { 2910 show_static_rule(co, fo, bp, r, cntr); 2911 printf("%s", bp->buf); 2912 bp_flush(bp); 2913 seen++; 2914 } 2915 } 2916 2917 return (seen); 2918 } 2919 2920 static void 2921 list_dyn_state(struct cmdline_opts *co, struct format_opts *fo, 2922 void *_arg, void *_state) 2923 { 2924 ipfw_dyn_rule *d; 2925 struct buf_pr *bp; 2926 2927 d = (ipfw_dyn_rule *)_state; 2928 bp = (struct buf_pr *)_arg; 2929 2930 if (d->rulenum > fo->last) 2931 return; 2932 if (co->use_set != 0 && d->set != co->use_set - 1) 2933 return; 2934 if (d->rulenum >= fo->first) { 2935 show_dyn_state(co, fo, bp, d); 2936 printf("%s\n", bp->buf); 2937 bp_flush(bp); 2938 } 2939 } 2940 2941 static int 2942 list_dyn_range(struct cmdline_opts *co, struct format_opts *fo, 2943 struct buf_pr *bp, caddr_t base, size_t sz) 2944 { 2945 2946 sz = foreach_state(co, fo, base, sz, list_dyn_state, bp); 2947 return (sz); 2948 } 2949 2950 void 2951 ipfw_list(int ac, char *av[], int show_counters) 2952 { 2953 ipfw_cfg_lheader *cfg; 2954 struct format_opts sfo; 2955 size_t sz; 2956 int error; 2957 int lac; 2958 char **lav; 2959 uint32_t rnum; 2960 char *endptr; 2961 2962 if (g_co.test_only) { 2963 fprintf(stderr, "Testing only, list disabled\n"); 2964 return; 2965 } 2966 if (g_co.do_pipe) { 2967 dummynet_list(ac, av, show_counters); 2968 return; 2969 } 2970 2971 ac--; 2972 av++; 2973 memset(&sfo, 0, sizeof(sfo)); 2974 2975 /* Determine rule range to request */ 2976 if (ac > 0) { 2977 for (lac = ac, lav = av; lac != 0; lac--) { 2978 rnum = strtoul(*lav++, &endptr, 10); 2979 if (sfo.first == 0 || rnum < sfo.first) 2980 sfo.first = rnum; 2981 2982 if (*endptr == '-') 2983 rnum = strtoul(endptr + 1, &endptr, 10); 2984 if (sfo.last == 0 || rnum > sfo.last) 2985 sfo.last = rnum; 2986 } 2987 } 2988 2989 /* get configuration from kernel */ 2990 cfg = NULL; 2991 sfo.show_counters = show_counters; 2992 sfo.show_time = g_co.do_time; 2993 if (g_co.do_dynamic != 2) 2994 sfo.flags |= IPFW_CFG_GET_STATIC; 2995 if (g_co.do_dynamic != 0) 2996 sfo.flags |= IPFW_CFG_GET_STATES; 2997 if ((sfo.show_counters | sfo.show_time) != 0) 2998 sfo.flags |= IPFW_CFG_GET_COUNTERS; 2999 if (ipfw_get_config(&g_co, &sfo, &cfg, &sz) != 0) 3000 err(EX_OSERR, "retrieving config failed"); 3001 3002 error = ipfw_show_config(&g_co, &sfo, cfg, sz, ac, av); 3003 3004 free(cfg); 3005 3006 if (error != EX_OK) 3007 exit(error); 3008 } 3009 3010 static int 3011 ipfw_show_config(struct cmdline_opts *co, struct format_opts *fo, 3012 ipfw_cfg_lheader *cfg, size_t sz, int ac, char *av[]) 3013 { 3014 caddr_t dynbase; 3015 size_t dynsz; 3016 int rcnt; 3017 int exitval = EX_OK; 3018 int lac; 3019 char **lav; 3020 char *endptr; 3021 size_t readsz; 3022 struct buf_pr bp; 3023 ipfw_obj_ctlv *ctlv; 3024 ipfw_obj_tlv *rbase; 3025 3026 /* 3027 * Handle tablenames TLV first, if any 3028 */ 3029 rbase = NULL; 3030 dynbase = NULL; 3031 dynsz = 0; 3032 readsz = sizeof(*cfg); 3033 rcnt = 0; 3034 3035 fo->set_mask = cfg->set_mask; 3036 3037 ctlv = (ipfw_obj_ctlv *)(cfg + 1); 3038 if (ctlv->head.type == IPFW_TLV_TBLNAME_LIST) { 3039 object_sort_ctlv(ctlv); 3040 fo->tstate = ctlv; 3041 readsz += ctlv->head.length; 3042 ctlv = (ipfw_obj_ctlv *)((caddr_t)ctlv + ctlv->head.length); 3043 } 3044 3045 if (cfg->flags & IPFW_CFG_GET_STATIC) { 3046 /* We've requested static rules */ 3047 if (ctlv->head.type == IPFW_TLV_RULE_LIST) { 3048 rbase = (ipfw_obj_tlv *)(ctlv + 1); 3049 rcnt = ctlv->count; 3050 readsz += ctlv->head.length; 3051 ctlv = (ipfw_obj_ctlv *)((caddr_t)ctlv + 3052 ctlv->head.length); 3053 } 3054 } 3055 3056 if ((cfg->flags & IPFW_CFG_GET_STATES) && (readsz != sz)) { 3057 /* We may have some dynamic states */ 3058 dynsz = sz - readsz; 3059 /* Skip empty header */ 3060 if (dynsz != sizeof(ipfw_obj_ctlv)) 3061 dynbase = (caddr_t)ctlv; 3062 else 3063 dynsz = 0; 3064 } 3065 3066 prepare_format_opts(co, fo, rbase, rcnt, dynbase, dynsz); 3067 bp_alloc(&bp, 4096); 3068 3069 /* if no rule numbers were specified, list all rules */ 3070 if (ac == 0) { 3071 fo->first = 0; 3072 fo->last = IPFW_DEFAULT_RULE; 3073 if (cfg->flags & IPFW_CFG_GET_STATIC) 3074 list_static_range(co, fo, &bp, rbase, rcnt); 3075 3076 if (co->do_dynamic && dynsz > 0) { 3077 printf("## Dynamic rules (%d %zu):\n", fo->dcnt, 3078 dynsz); 3079 list_dyn_range(co, fo, &bp, dynbase, dynsz); 3080 } 3081 3082 bp_free(&bp); 3083 return (EX_OK); 3084 } 3085 3086 /* display specific rules requested on command line */ 3087 for (lac = ac, lav = av; lac != 0; lac--) { 3088 /* convert command line rule # */ 3089 fo->last = fo->first = strtoul(*lav++, &endptr, 10); 3090 if (*endptr == '-') 3091 fo->last = strtoul(endptr + 1, &endptr, 10); 3092 if (*endptr) { 3093 exitval = EX_USAGE; 3094 warnx("invalid rule number: %s", *(lav - 1)); 3095 continue; 3096 } 3097 3098 if ((cfg->flags & IPFW_CFG_GET_STATIC) == 0) 3099 continue; 3100 3101 if (list_static_range(co, fo, &bp, rbase, rcnt) == 0) { 3102 /* give precedence to other error(s) */ 3103 if (exitval == EX_OK) 3104 exitval = EX_UNAVAILABLE; 3105 if (fo->first == fo->last) 3106 warnx("rule %u does not exist", fo->first); 3107 else 3108 warnx("no rules in range %u-%u", 3109 fo->first, fo->last); 3110 } 3111 } 3112 3113 if (co->do_dynamic && dynsz > 0) { 3114 printf("## Dynamic rules:\n"); 3115 for (lac = ac, lav = av; lac != 0; lac--) { 3116 fo->last = fo->first = strtoul(*lav++, &endptr, 10); 3117 if (*endptr == '-') 3118 fo->last = strtoul(endptr+1, &endptr, 10); 3119 if (*endptr) 3120 /* already warned */ 3121 continue; 3122 list_dyn_range(co, fo, &bp, dynbase, dynsz); 3123 } 3124 } 3125 3126 bp_free(&bp); 3127 return (exitval); 3128 } 3129 3130 3131 /* 3132 * Retrieves current ipfw configuration of given type 3133 * and stores its pointer to @pcfg. 3134 * 3135 * Caller is responsible for freeing @pcfg. 3136 * 3137 * Returns 0 on success. 3138 */ 3139 3140 static int 3141 ipfw_get_config(struct cmdline_opts *co, struct format_opts *fo, 3142 ipfw_cfg_lheader **pcfg, size_t *psize) 3143 { 3144 ipfw_cfg_lheader *cfg; 3145 size_t sz; 3146 int i; 3147 3148 3149 if (co->test_only != 0) { 3150 fprintf(stderr, "Testing only, list disabled\n"); 3151 return (0); 3152 } 3153 3154 /* Start with some data size */ 3155 sz = 4096; 3156 cfg = NULL; 3157 3158 for (i = 0; i < 16; i++) { 3159 if (cfg != NULL) 3160 free(cfg); 3161 if ((cfg = calloc(1, sz)) == NULL) 3162 return (ENOMEM); 3163 3164 cfg->flags = fo->flags; 3165 cfg->start_rule = fo->first; 3166 cfg->end_rule = fo->last; 3167 3168 if (do_get3(IP_FW_XGET, &cfg->opheader, &sz) != 0) { 3169 if (errno != ENOMEM) { 3170 free(cfg); 3171 return (errno); 3172 } 3173 3174 /* Buffer size is not enough. Try to increase */ 3175 sz = sz * 2; 3176 if (sz < cfg->size) 3177 sz = cfg->size; 3178 continue; 3179 } 3180 3181 *pcfg = cfg; 3182 *psize = sz; 3183 return (0); 3184 } 3185 3186 free(cfg); 3187 return (ENOMEM); 3188 } 3189 3190 static int 3191 lookup_host (char *host, struct in_addr *ipaddr) 3192 { 3193 struct hostent *he; 3194 3195 if (!inet_aton(host, ipaddr)) { 3196 if ((he = gethostbyname(host)) == NULL) 3197 return(-1); 3198 *ipaddr = *(struct in_addr *)he->h_addr_list[0]; 3199 } 3200 return(0); 3201 } 3202 3203 struct tidx { 3204 ipfw_obj_ntlv *idx; 3205 uint32_t count; 3206 uint32_t size; 3207 uint16_t counter; 3208 uint8_t set; 3209 }; 3210 3211 int 3212 ipfw_check_object_name(const char *name) 3213 { 3214 int c, i, l; 3215 3216 /* 3217 * Check that name is null-terminated and contains 3218 * valid symbols only. Valid mask is: 3219 * [a-zA-Z0-9\-_\.]{1,63} 3220 */ 3221 l = strlen(name); 3222 if (l == 0 || l >= 64) 3223 return (EINVAL); 3224 for (i = 0; i < l; i++) { 3225 c = name[i]; 3226 if (isalpha(c) || isdigit(c) || c == '_' || 3227 c == '-' || c == '.') 3228 continue; 3229 return (EINVAL); 3230 } 3231 return (0); 3232 } 3233 3234 static const char *default_state_name = "default"; 3235 3236 static int 3237 state_check_name(const char *name) 3238 { 3239 3240 if (ipfw_check_object_name(name) != 0) 3241 return (EINVAL); 3242 if (strcmp(name, "any") == 0) 3243 return (EINVAL); 3244 return (0); 3245 } 3246 3247 static int 3248 eaction_check_name(const char *name) 3249 { 3250 3251 if (ipfw_check_object_name(name) != 0) 3252 return (EINVAL); 3253 /* Restrict some 'special' names */ 3254 if (match_token(rule_actions, name) != -1 && 3255 match_token(rule_action_params, name) != -1) 3256 return (EINVAL); 3257 return (0); 3258 } 3259 3260 static uint32_t 3261 pack_object(struct tidx *tstate, const char *name, int otype) 3262 { 3263 ipfw_obj_ntlv *ntlv; 3264 uint32_t i; 3265 3266 for (i = 0; i < tstate->count; i++) { 3267 if (strcmp(tstate->idx[i].name, name) != 0) 3268 continue; 3269 if (tstate->idx[i].set != tstate->set) 3270 continue; 3271 if (tstate->idx[i].head.type != otype) 3272 continue; 3273 3274 return (tstate->idx[i].idx); 3275 } 3276 3277 if (tstate->count + 1 > tstate->size) { 3278 tstate->size += 4; 3279 tstate->idx = realloc(tstate->idx, tstate->size * 3280 sizeof(ipfw_obj_ntlv)); 3281 if (tstate->idx == NULL) 3282 return (0); 3283 } 3284 3285 ntlv = &tstate->idx[i]; 3286 memset(ntlv, 0, sizeof(ipfw_obj_ntlv)); 3287 strlcpy(ntlv->name, name, sizeof(ntlv->name)); 3288 ntlv->head.type = otype; 3289 ntlv->head.length = sizeof(ipfw_obj_ntlv); 3290 ntlv->set = tstate->set; 3291 ntlv->idx = ++tstate->counter; 3292 tstate->count++; 3293 3294 return (ntlv->idx); 3295 } 3296 3297 static uint32_t 3298 pack_table(struct tidx *tstate, const char *name) 3299 { 3300 3301 if (table_check_name(name) != 0) 3302 return (0); 3303 3304 return (pack_object(tstate, name, IPFW_TLV_TBL_NAME)); 3305 } 3306 3307 static void 3308 fill_table_value(ipfw_insn *cmd, char *s) 3309 { 3310 char *p; 3311 int i; 3312 3313 p = strchr(s, '='); 3314 if (p != NULL) { 3315 *p++ = '\0'; 3316 i = match_token(tvalue_names, s); 3317 if (i == -1) 3318 errx(EX_USAGE, 3319 "format: unknown table value name %s", s); 3320 } else { 3321 i = TVALUE_TAG; 3322 p = s; 3323 } 3324 3325 IPFW_SET_TVALUE_TYPE(cmd, i); 3326 insntod(cmd, table)->value = strtoul(p, NULL, 0); 3327 } 3328 3329 void 3330 fill_table(ipfw_insn *cmd, char *av, uint8_t opcode, struct tidx *tstate) 3331 { 3332 ipfw_insn_kidx *c = insntod(cmd, kidx); 3333 char *p; 3334 3335 if ((p = strchr(av + 6, ')')) == NULL) 3336 errx(EX_DATAERR, "forgotten parenthesis: '%s'", av); 3337 *p = '\0'; 3338 p = strchr(av + 6, ','); 3339 if (p) 3340 *p++ = '\0'; 3341 3342 if ((c->kidx = pack_table(tstate, av + 6)) == 0) 3343 errx(EX_DATAERR, "Invalid table name: %s", av + 6); 3344 3345 cmd->opcode = opcode; 3346 if (p) { 3347 cmd->len |= F_INSN_SIZE(ipfw_insn_table); 3348 fill_table_value(cmd, p); 3349 } else { 3350 IPFW_SET_LOOKUP_TYPE(cmd, LOOKUP_NONE); 3351 cmd->len |= F_INSN_SIZE(ipfw_insn_kidx); 3352 } 3353 } 3354 3355 /* 3356 * fills the addr and mask fields in the instruction as appropriate from av. 3357 * Update length as appropriate. 3358 * The following formats are allowed: 3359 * me returns O_IP_*_ME 3360 * 1.2.3.4 single IP address 3361 * 1.2.3.4:5.6.7.8 address:mask 3362 * 1.2.3.4/24 address/mask 3363 * 1.2.3.4/26{1,6,5,4,23} set of addresses in a subnet 3364 * We can have multiple comma-separated address/mask entries. 3365 */ 3366 static void 3367 fill_ip(ipfw_insn_ip *cmd, char *av, int cblen, struct tidx *tstate) 3368 { 3369 int len = 0; 3370 uint32_t *d = ((ipfw_insn_u32 *)cmd)->d; 3371 3372 cmd->o.len &= ~F_LEN_MASK; /* zero len */ 3373 3374 if (_substrcmp(av, "any") == 0) 3375 return; 3376 3377 if (_substrcmp(av, "me") == 0) { 3378 cmd->o.len |= F_INSN_SIZE(ipfw_insn); 3379 return; 3380 } 3381 3382 if (strncmp(av, "table(", 6) == 0) { 3383 fill_table(&cmd->o, av, O_IP_DST_LOOKUP, tstate); 3384 return; 3385 } 3386 3387 while (av) { 3388 /* 3389 * After the address we can have '/' or ':' indicating a mask, 3390 * ',' indicating another address follows, '{' indicating a 3391 * set of addresses of unspecified size. 3392 */ 3393 char *t = NULL, *p = strpbrk(av, "/:,{"); 3394 int masklen; 3395 char md, nd = '\0'; 3396 3397 CHECK_LENGTH(cblen, (int)F_INSN_SIZE(ipfw_insn) + 2 + len); 3398 3399 if (p) { 3400 md = *p; 3401 *p++ = '\0'; 3402 if ((t = strpbrk(p, ",{")) != NULL) { 3403 nd = *t; 3404 *t = '\0'; 3405 } 3406 } else 3407 md = '\0'; 3408 3409 if (lookup_host(av, (struct in_addr *)&d[0]) != 0) 3410 errx(EX_NOHOST, "hostname ``%s'' unknown", av); 3411 switch (md) { 3412 case ':': 3413 if (!inet_aton(p, (struct in_addr *)&d[1])) 3414 errx(EX_DATAERR, "bad netmask ``%s''", p); 3415 break; 3416 case '/': 3417 masklen = atoi(p); 3418 if (masklen == 0) 3419 d[1] = htonl(0U); /* mask */ 3420 else if (masklen > 32) 3421 errx(EX_DATAERR, "bad width ``%s''", p); 3422 else 3423 d[1] = htonl(~0U << (32 - masklen)); 3424 break; 3425 case '{': /* no mask, assume /24 and put back the '{' */ 3426 d[1] = htonl(~0U << (32 - 24)); 3427 *(--p) = md; 3428 break; 3429 3430 case ',': /* single address plus continuation */ 3431 *(--p) = md; 3432 /* FALLTHROUGH */ 3433 case 0: /* initialization value */ 3434 default: 3435 d[1] = htonl(~0U); /* force /32 */ 3436 break; 3437 } 3438 d[0] &= d[1]; /* mask base address with mask */ 3439 if (t) 3440 *t = nd; 3441 /* find next separator */ 3442 if (p) 3443 p = strpbrk(p, ",{"); 3444 if (p && *p == '{') { 3445 /* 3446 * We have a set of addresses. They are stored as follows: 3447 * arg1 is the set size (powers of 2, 2..256) 3448 * addr is the base address IN HOST FORMAT 3449 * mask.. is an array of arg1 bits (rounded up to 3450 * the next multiple of 32) with bits set 3451 * for each host in the map. 3452 */ 3453 uint32_t *map = (uint32_t *)&cmd->mask; 3454 int low, high; 3455 int i = contigmask((uint8_t *)&(d[1]), 32); 3456 3457 if (len > 0) 3458 errx(EX_DATAERR, "address set cannot be in a list"); 3459 if (i < 24 || i > 31) 3460 errx(EX_DATAERR, "invalid set with mask %d\n", i); 3461 cmd->o.arg1 = 1<<(32-i); /* map length */ 3462 d[0] = ntohl(d[0]); /* base addr in host format */ 3463 cmd->o.opcode = O_IP_DST_SET; /* default */ 3464 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32) + (cmd->o.arg1+31)/32; 3465 for (i = 0; i < (cmd->o.arg1+31)/32 ; i++) 3466 map[i] = 0; /* clear map */ 3467 3468 av = p + 1; 3469 low = d[0] & 0xff; 3470 high = low + cmd->o.arg1 - 1; 3471 /* 3472 * Here, i stores the previous value when we specify a range 3473 * of addresses within a mask, e.g. 45-63. i = -1 means we 3474 * have no previous value. 3475 */ 3476 i = -1; /* previous value in a range */ 3477 while (isdigit(*av)) { 3478 char *s; 3479 int a = strtol(av, &s, 0); 3480 3481 if (s == av) { /* no parameter */ 3482 if (*av != '}') 3483 errx(EX_DATAERR, "set not closed\n"); 3484 if (i != -1) 3485 errx(EX_DATAERR, "incomplete range %d-", i); 3486 break; 3487 } 3488 if (a < low || a > high) 3489 errx(EX_DATAERR, "addr %d out of range [%d-%d]\n", 3490 a, low, high); 3491 a -= low; 3492 if (i == -1) /* no previous in range */ 3493 i = a; 3494 else { /* check that range is valid */ 3495 if (i > a) 3496 errx(EX_DATAERR, "invalid range %d-%d", 3497 i+low, a+low); 3498 if (*s == '-') 3499 errx(EX_DATAERR, "double '-' in range"); 3500 } 3501 for (; i <= a; i++) 3502 map[i/32] |= 1<<(i & 31); 3503 i = -1; 3504 if (*s == '-') 3505 i = a; 3506 else if (*s == '}') 3507 break; 3508 av = s+1; 3509 } 3510 return; 3511 } 3512 av = p; 3513 if (av) /* then *av must be a ',' */ 3514 av++; 3515 3516 /* Check this entry */ 3517 if (d[1] == 0) { /* "any", specified as x.x.x.x/0 */ 3518 /* 3519 * 'any' turns the entire list into a NOP. 3520 * 'not any' never matches, so it is removed from the 3521 * list unless it is the only item, in which case we 3522 * report an error. 3523 */ 3524 if (cmd->o.len & F_NOT) { /* "not any" never matches */ 3525 if (av == NULL && len == 0) /* only this entry */ 3526 errx(EX_DATAERR, "not any never matches"); 3527 } 3528 /* else do nothing and skip this entry */ 3529 return; 3530 } 3531 /* A single IP can be stored in an optimized format */ 3532 if (d[1] == (uint32_t)~0 && av == NULL && len == 0) { 3533 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32); 3534 return; 3535 } 3536 len += 2; /* two words... */ 3537 d += 2; 3538 } /* end while */ 3539 if (len + 1 > F_LEN_MASK) 3540 errx(EX_DATAERR, "address list too long"); 3541 cmd->o.len |= len+1; 3542 } 3543 3544 3545 /* n2mask sets n bits of the mask */ 3546 void 3547 n2mask(struct in6_addr *mask, int n) 3548 { 3549 static int minimask[9] = 3550 { 0x00, 0x80, 0xc0, 0xe0, 0xf0, 0xf8, 0xfc, 0xfe, 0xff }; 3551 u_char *p; 3552 3553 memset(mask, 0, sizeof(struct in6_addr)); 3554 p = (u_char *) mask; 3555 for (; n > 0; p++, n -= 8) { 3556 if (n >= 8) 3557 *p = 0xff; 3558 else 3559 *p = minimask[n]; 3560 } 3561 return; 3562 } 3563 3564 static void 3565 fill_flags_cmd(ipfw_insn *cmd, enum ipfw_opcodes opcode, 3566 struct _s_x *flags, char *p) 3567 { 3568 char *e; 3569 uint32_t set = 0, clear = 0; 3570 3571 if (fill_flags(flags, p, &e, &set, &clear) != 0) 3572 errx(EX_DATAERR, "invalid flag %s", e); 3573 3574 cmd->opcode = opcode; 3575 cmd->len = (cmd->len & (F_NOT | F_OR)) | 1; 3576 cmd->arg1 = (set & 0xff) | ( (clear & 0xff) << 8); 3577 } 3578 3579 3580 void 3581 ipfw_delete(char *av[]) 3582 { 3583 ipfw_range_tlv rt; 3584 char *sep; 3585 uint32_t i, j; 3586 int exitval = EX_OK; 3587 int do_set = 0; 3588 3589 av++; 3590 NEED1("missing rule specification"); 3591 if ( *av && _substrcmp(*av, "set") == 0) { 3592 /* Do not allow using the following syntax: 3593 * ipfw set N delete set M 3594 */ 3595 if (g_co.use_set) 3596 errx(EX_DATAERR, "invalid syntax"); 3597 do_set = 1; /* delete set */ 3598 av++; 3599 } 3600 3601 /* Rule number */ 3602 while (*av && isdigit(**av)) { 3603 i = strtol(*av, &sep, 10); 3604 j = i; 3605 if (*sep== '-') 3606 j = strtol(sep + 1, NULL, 10); 3607 av++; 3608 if (g_co.do_nat) { 3609 exitval = ipfw_delete_nat(i); 3610 } else if (g_co.do_pipe) { 3611 exitval = ipfw_delete_pipe(g_co.do_pipe, i); 3612 } else { 3613 memset(&rt, 0, sizeof(rt)); 3614 if (do_set != 0) { 3615 rt.set = i & 31; 3616 rt.flags = IPFW_RCFLAG_SET; 3617 } else { 3618 rt.start_rule = i; 3619 rt.end_rule = j; 3620 if (rt.start_rule == 0 && rt.end_rule == 0) 3621 rt.flags |= IPFW_RCFLAG_ALL; 3622 else 3623 rt.flags |= IPFW_RCFLAG_RANGE; 3624 if (g_co.use_set != 0) { 3625 rt.set = g_co.use_set - 1; 3626 rt.flags |= IPFW_RCFLAG_SET; 3627 } 3628 } 3629 if (g_co.do_dynamic == 2) 3630 rt.flags |= IPFW_RCFLAG_DYNAMIC; 3631 i = do_range_cmd(IP_FW_XDEL, &rt); 3632 if (i != 0) { 3633 exitval = EX_UNAVAILABLE; 3634 if (g_co.do_quiet) 3635 continue; 3636 warn("rule %u: setsockopt(IP_FW_XDEL)", 3637 rt.start_rule); 3638 } else if (rt.new_set == 0 && do_set == 0 && 3639 g_co.do_dynamic != 2) { 3640 exitval = EX_UNAVAILABLE; 3641 if (g_co.do_quiet) 3642 continue; 3643 if (rt.start_rule != rt.end_rule) 3644 warnx("no rules in %u-%u range", 3645 rt.start_rule, rt.end_rule); 3646 else 3647 warnx("rule %u not found", 3648 rt.start_rule); 3649 } 3650 } 3651 } 3652 if (exitval != EX_OK && g_co.do_force == 0) 3653 exit(exitval); 3654 } 3655 3656 /* 3657 * fill the interface structure. We do not check the name as we can 3658 * create interfaces dynamically, so checking them at insert time 3659 * makes relatively little sense. 3660 * Interface names containing '*', '?', or '[' are assumed to be shell 3661 * patterns which match interfaces. 3662 */ 3663 static void 3664 fill_iface(ipfw_insn_if *cmd, char *arg, int cblen, struct tidx *tstate) 3665 { 3666 char *p; 3667 uint32_t uidx; 3668 3669 cmd->name[0] = '\0'; 3670 cmd->o.len |= F_INSN_SIZE(ipfw_insn_if); 3671 3672 CHECK_CMDLEN; 3673 3674 /* Parse the interface or address */ 3675 if (strcmp(arg, "any") == 0) 3676 cmd->o.len = 0; /* effectively ignore this command */ 3677 else if (strncmp(arg, "table(", 6) == 0) { 3678 if ((p = strchr(arg + 6, ')')) == NULL) 3679 errx(EX_DATAERR, "forgotten parenthesis: '%s'", arg); 3680 *p = '\0'; 3681 p = strchr(arg + 6, ','); 3682 if (p) 3683 *p++ = '\0'; 3684 if ((uidx = pack_table(tstate, arg + 6)) == 0) 3685 errx(EX_DATAERR, "Invalid table name: %s", arg + 6); 3686 3687 cmd->name[0] = '\1'; /* Special value indicating table */ 3688 cmd->p.kidx = uidx; 3689 } else if (!isdigit(*arg)) { 3690 strlcpy(cmd->name, arg, sizeof(cmd->name)); 3691 cmd->p.glob = strpbrk(arg, "*?[") != NULL ? 1 : 0; 3692 } else if (!inet_aton(arg, &cmd->p.ip)) 3693 errx(EX_DATAERR, "bad ip address ``%s''", arg); 3694 } 3695 3696 static void 3697 get_mac_addr_mask(const char *p, uint8_t *addr, uint8_t *mask) 3698 { 3699 int i; 3700 size_t l; 3701 char *ap, *ptr, *optr; 3702 struct ether_addr *mac; 3703 const char *macset = "0123456789abcdefABCDEF:"; 3704 3705 if (strcmp(p, "any") == 0) { 3706 for (i = 0; i < ETHER_ADDR_LEN; i++) 3707 addr[i] = mask[i] = 0; 3708 return; 3709 } 3710 3711 optr = ptr = strdup(p); 3712 if ((ap = strsep(&ptr, "&/")) != NULL && *ap != 0) { 3713 l = strlen(ap); 3714 if (strspn(ap, macset) != l || (mac = ether_aton(ap)) == NULL) 3715 errx(EX_DATAERR, "Incorrect MAC address"); 3716 bcopy(mac, addr, ETHER_ADDR_LEN); 3717 } else 3718 errx(EX_DATAERR, "Incorrect MAC address"); 3719 3720 if (ptr != NULL) { /* we have mask? */ 3721 if (p[ptr - optr - 1] == '/') { /* mask len */ 3722 long ml = strtol(ptr, &ap, 10); 3723 if (*ap != 0 || ml > ETHER_ADDR_LEN * 8 || ml < 0) 3724 errx(EX_DATAERR, "Incorrect mask length"); 3725 for (i = 0; ml > 0 && i < ETHER_ADDR_LEN; ml -= 8, i++) 3726 mask[i] = (ml >= 8) ? 0xff: (~0) << (8 - ml); 3727 } else { /* mask */ 3728 l = strlen(ptr); 3729 if (strspn(ptr, macset) != l || 3730 (mac = ether_aton(ptr)) == NULL) 3731 errx(EX_DATAERR, "Incorrect mask"); 3732 bcopy(mac, mask, ETHER_ADDR_LEN); 3733 } 3734 } else { /* default mask: ff:ff:ff:ff:ff:ff */ 3735 for (i = 0; i < ETHER_ADDR_LEN; i++) 3736 mask[i] = 0xff; 3737 } 3738 for (i = 0; i < ETHER_ADDR_LEN; i++) 3739 addr[i] &= mask[i]; 3740 3741 free(optr); 3742 } 3743 3744 /* 3745 * helper function, updates the pointer to cmd with the length 3746 * of the current command, and also cleans up the first word of 3747 * the new command in case it has been clobbered before. 3748 */ 3749 static ipfw_insn * 3750 next_cmd(ipfw_insn *cmd, int *len) 3751 { 3752 *len -= F_LEN(cmd); 3753 CHECK_LENGTH(*len, 0); 3754 cmd += F_LEN(cmd); 3755 bzero(cmd, sizeof(*cmd)); 3756 return cmd; 3757 } 3758 3759 /* 3760 * Takes arguments and copies them into a comment 3761 */ 3762 static void 3763 fill_comment(ipfw_insn *cmd, char **av, int cblen) 3764 { 3765 int i, l; 3766 char *p = (char *)(cmd + 1); 3767 3768 cmd->opcode = O_NOP; 3769 cmd->len = (cmd->len & (F_NOT | F_OR)); 3770 3771 /* Compute length of comment string. */ 3772 for (i = 0, l = 0; av[i] != NULL; i++) 3773 l += strlen(av[i]) + 1; 3774 if (l == 0) 3775 return; 3776 if (l > 84) 3777 errx(EX_DATAERR, 3778 "comment too long (max 80 chars)"); 3779 l = 1 + (l+3)/4; 3780 cmd->len = (cmd->len & (F_NOT | F_OR)) | l; 3781 CHECK_CMDLEN; 3782 3783 for (i = 0; av[i] != NULL; i++) { 3784 strcpy(p, av[i]); 3785 p += strlen(av[i]); 3786 *p++ = ' '; 3787 } 3788 *(--p) = '\0'; 3789 } 3790 3791 /* 3792 * A function to fill simple commands of size 1. 3793 * Existing flags are preserved. 3794 */ 3795 static void 3796 fill_cmd(ipfw_insn *cmd, enum ipfw_opcodes opcode, int flags, uint16_t arg) 3797 { 3798 cmd->opcode = opcode; 3799 cmd->len = ((cmd->len | flags) & (F_NOT | F_OR)) | 1; 3800 cmd->arg1 = arg; 3801 } 3802 3803 /* 3804 * Fetch and add the MAC address and type, with masks. This generates one or 3805 * two microinstructions, and returns the pointer to the last one. 3806 */ 3807 static ipfw_insn * 3808 add_mac(ipfw_insn *cmd, char *av[], int cblen) 3809 { 3810 ipfw_insn_mac *mac; 3811 3812 if ( ( av[0] == NULL ) || ( av[1] == NULL ) ) 3813 errx(EX_DATAERR, "MAC dst src"); 3814 3815 cmd->opcode = O_MACADDR2; 3816 cmd->len = (cmd->len & (F_NOT | F_OR)) | F_INSN_SIZE(ipfw_insn_mac); 3817 CHECK_CMDLEN; 3818 3819 mac = (ipfw_insn_mac *)cmd; 3820 get_mac_addr_mask(av[0], mac->addr, mac->mask); /* dst */ 3821 get_mac_addr_mask(av[1], &(mac->addr[ETHER_ADDR_LEN]), 3822 &(mac->mask[ETHER_ADDR_LEN])); /* src */ 3823 return cmd; 3824 } 3825 3826 static ipfw_insn * 3827 add_mactype(ipfw_insn *cmd, char *av, int cblen) 3828 { 3829 if (!av) 3830 errx(EX_DATAERR, "missing MAC type"); 3831 if (strcmp(av, "any") != 0) { /* we have a non-null type */ 3832 fill_newports((ipfw_insn_u16 *)cmd, av, IPPROTO_ETHERTYPE, 3833 cblen); 3834 cmd->opcode = O_MAC_TYPE; 3835 return cmd; 3836 } else 3837 return NULL; 3838 } 3839 3840 static ipfw_insn * 3841 add_proto0(ipfw_insn *cmd, char *av, u_char *protop) 3842 { 3843 struct protoent *pe; 3844 char *ep; 3845 int proto; 3846 3847 proto = strtol(av, &ep, 10); 3848 if (*ep != '\0' || proto <= 0) { 3849 if ((pe = getprotobyname(av)) == NULL) 3850 return NULL; 3851 proto = pe->p_proto; 3852 } 3853 3854 fill_cmd(cmd, O_PROTO, 0, proto); 3855 *protop = proto; 3856 return cmd; 3857 } 3858 3859 static ipfw_insn * 3860 add_proto(ipfw_insn *cmd, char *av, u_char *protop) 3861 { 3862 u_char proto = IPPROTO_IP; 3863 3864 if (_substrcmp(av, "all") == 0 || strcmp(av, "ip") == 0) 3865 ; /* do not set O_IP4 nor O_IP6 */ 3866 else if (strcmp(av, "ip4") == 0) 3867 /* explicit "just IPv4" rule */ 3868 fill_cmd(cmd, O_IP4, 0, 0); 3869 else if (strcmp(av, "ip6") == 0) { 3870 /* explicit "just IPv6" rule */ 3871 proto = IPPROTO_IPV6; 3872 fill_cmd(cmd, O_IP6, 0, 0); 3873 } else 3874 return add_proto0(cmd, av, protop); 3875 3876 *protop = proto; 3877 return cmd; 3878 } 3879 3880 static ipfw_insn * 3881 add_proto_compat(ipfw_insn *cmd, char *av, u_char *protop) 3882 { 3883 u_char proto = IPPROTO_IP; 3884 3885 if (_substrcmp(av, "all") == 0 || strcmp(av, "ip") == 0) 3886 ; /* do not set O_IP4 nor O_IP6 */ 3887 else if (strcmp(av, "ipv4") == 0 || strcmp(av, "ip4") == 0) 3888 /* explicit "just IPv4" rule */ 3889 fill_cmd(cmd, O_IP4, 0, 0); 3890 else if (strcmp(av, "ipv6") == 0 || strcmp(av, "ip6") == 0) { 3891 /* explicit "just IPv6" rule */ 3892 proto = IPPROTO_IPV6; 3893 fill_cmd(cmd, O_IP6, 0, 0); 3894 } else 3895 return add_proto0(cmd, av, protop); 3896 3897 *protop = proto; 3898 return cmd; 3899 } 3900 3901 static ipfw_insn * 3902 add_srcip(ipfw_insn *cmd, char *av, int cblen, struct tidx *tstate) 3903 { 3904 fill_ip((ipfw_insn_ip *)cmd, av, cblen, tstate); 3905 if (cmd->opcode == O_IP_DST_SET) /* set */ 3906 cmd->opcode = O_IP_SRC_SET; 3907 else if (cmd->opcode == O_IP_DST_LOOKUP) /* table */ 3908 cmd->opcode = O_IP_SRC_LOOKUP; 3909 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn)) /* me */ 3910 cmd->opcode = O_IP_SRC_ME; 3911 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_u32)) /* one IP */ 3912 cmd->opcode = O_IP_SRC; 3913 else /* addr/mask */ 3914 cmd->opcode = O_IP_SRC_MASK; 3915 return cmd; 3916 } 3917 3918 static ipfw_insn * 3919 add_dstip(ipfw_insn *cmd, char *av, int cblen, struct tidx *tstate) 3920 { 3921 fill_ip((ipfw_insn_ip *)cmd, av, cblen, tstate); 3922 if (cmd->opcode == O_IP_DST_SET) /* set */ 3923 ; 3924 else if (cmd->opcode == O_IP_DST_LOOKUP) /* table */ 3925 ; 3926 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn)) /* me */ 3927 cmd->opcode = O_IP_DST_ME; 3928 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_u32)) /* one IP */ 3929 cmd->opcode = O_IP_DST; 3930 else /* addr/mask */ 3931 cmd->opcode = O_IP_DST_MASK; 3932 return cmd; 3933 } 3934 3935 static ipfw_insn * 3936 add_srcmac(ipfw_insn *cmd, char *av, struct tidx *tstate) 3937 { 3938 3939 if (strncmp(av, "table(", 6) == 0) 3940 fill_table(cmd, av, O_MAC_SRC_LOOKUP, tstate); 3941 else 3942 errx(EX_DATAERR, "only mac table lookup is supported %s", av); 3943 return cmd; 3944 } 3945 3946 static ipfw_insn * 3947 add_dstmac(ipfw_insn *cmd, char *av, struct tidx *tstate) 3948 { 3949 3950 if (strncmp(av, "table(", 6) == 0) 3951 fill_table(cmd, av, O_MAC_DST_LOOKUP, tstate); 3952 else 3953 errx(EX_DATAERR, "only mac table lookup is supported %s", av); 3954 return cmd; 3955 } 3956 3957 3958 static struct _s_x f_reserved_keywords[] = { 3959 { "altq", TOK_OR }, 3960 { "//", TOK_OR }, 3961 { "diverted", TOK_OR }, 3962 { "dst-port", TOK_OR }, 3963 { "src-port", TOK_OR }, 3964 { "established", TOK_OR }, 3965 { "keep-state", TOK_OR }, 3966 { "frag", TOK_OR }, 3967 { "icmptypes", TOK_OR }, 3968 { "in", TOK_OR }, 3969 { "out", TOK_OR }, 3970 { "ip6", TOK_OR }, 3971 { "any", TOK_OR }, 3972 { "to", TOK_OR }, 3973 { "via", TOK_OR }, 3974 { "{", TOK_OR }, 3975 { "lookup", TOK_OR }, 3976 { "tagged", TOK_OR }, 3977 { NULL, 0 } /* terminator */ 3978 }; 3979 3980 static ipfw_insn * 3981 add_ports(ipfw_insn *cmd, char *av, u_char proto, int opcode, int cblen) 3982 { 3983 3984 if (match_token(f_reserved_keywords, av) != -1) 3985 return (NULL); 3986 3987 if (fill_newports((ipfw_insn_u16 *)cmd, av, proto, cblen)) { 3988 /* XXX todo: check that we have a protocol with ports */ 3989 cmd->opcode = opcode; 3990 return cmd; 3991 } 3992 return NULL; 3993 } 3994 3995 static ipfw_insn * 3996 add_src(ipfw_insn *cmd, char *av, u_char proto, int cblen, struct tidx *tstate) 3997 { 3998 struct in6_addr a; 3999 char *host, *ch, buf[INET6_ADDRSTRLEN]; 4000 ipfw_insn *ret = NULL; 4001 size_t len; 4002 4003 /* Copy first address in set if needed */ 4004 if ((ch = strpbrk(av, "/,")) != NULL) { 4005 len = ch - av; 4006 strlcpy(buf, av, sizeof(buf)); 4007 if (len < sizeof(buf)) 4008 buf[len] = '\0'; 4009 host = buf; 4010 } else 4011 host = av; 4012 4013 if (proto == IPPROTO_IPV6 || strcmp(av, "me6") == 0 || 4014 inet_pton(AF_INET6, host, &a) == 1) 4015 ret = add_srcip6(cmd, av, cblen, tstate); 4016 /* XXX: should check for IPv4, not !IPv6 */ 4017 if (ret == NULL && (proto == IPPROTO_IP || strcmp(av, "me") == 0 || 4018 inet_pton(AF_INET6, host, &a) != 1)) 4019 ret = add_srcip(cmd, av, cblen, tstate); 4020 if (ret == NULL && strcmp(av, "any") != 0) 4021 ret = cmd; 4022 4023 return ret; 4024 } 4025 4026 static ipfw_insn * 4027 add_dst(ipfw_insn *cmd, char *av, u_char proto, int cblen, struct tidx *tstate) 4028 { 4029 struct in6_addr a; 4030 char *host, *ch, buf[INET6_ADDRSTRLEN]; 4031 ipfw_insn *ret = NULL; 4032 size_t len; 4033 4034 /* Copy first address in set if needed */ 4035 if ((ch = strpbrk(av, "/,")) != NULL) { 4036 len = ch - av; 4037 strlcpy(buf, av, sizeof(buf)); 4038 if (len < sizeof(buf)) 4039 buf[len] = '\0'; 4040 host = buf; 4041 } else 4042 host = av; 4043 4044 if (proto == IPPROTO_IPV6 || strcmp(av, "me6") == 0 || 4045 inet_pton(AF_INET6, host, &a) == 1) 4046 ret = add_dstip6(cmd, av, cblen, tstate); 4047 /* XXX: should check for IPv4, not !IPv6 */ 4048 if (ret == NULL && (proto == IPPROTO_IP || strcmp(av, "me") == 0 || 4049 inet_pton(AF_INET6, host, &a) != 1)) 4050 ret = add_dstip(cmd, av, cblen, tstate); 4051 if (ret == NULL && strcmp(av, "any") != 0) 4052 ret = cmd; 4053 4054 return ret; 4055 } 4056 4057 static uint16_t 4058 parse_logdst(char *logdst_iter) 4059 { 4060 char *token; 4061 uint16_t ret; 4062 4063 ret = IPFW_LOG_DEFAULT; 4064 while ((token = strsep(&logdst_iter, ",")) != NULL) { 4065 if (_substrcmp(token, "syslog") == 0) { 4066 ret |= IPFW_LOG_SYSLOG; 4067 continue; 4068 } 4069 if (_substrcmp(token, "ipfw0") == 0) { 4070 /* XXX add multiple ipfw* */ 4071 ret |= IPFW_LOG_IPFW0; 4072 continue; 4073 } 4074 if (_substrcmp(token, "rtsock") == 0) { 4075 ret |= IPFW_LOG_RTSOCK; 4076 continue; 4077 } 4078 errx(EX_DATAERR, 4079 "unsupported logdst token"); 4080 } 4081 return (ret); 4082 } 4083 4084 static inline uint32_t 4085 arg_or_targ_relaxed(const char *arg, const char *action, uint32_t maxarg) 4086 { 4087 uint32_t arg1 = (uint32_t)(-1); 4088 4089 if (arg == NULL) 4090 errx(EX_USAGE, "missing argument for %s", action); 4091 if (isdigit(arg[0])) { 4092 arg1 = strtoul(arg, NULL, 10); 4093 if (arg1 < IPFW_ARG_MIN || arg1 > maxarg) 4094 errx(EX_DATAERR, "illegal argument %s(%u) for %s", 4095 arg, arg1, action); 4096 } else if (_substrcmp(arg, "tablearg") == 0) 4097 arg1 = IP_FW_TARG; 4098 return (arg1); 4099 } 4100 4101 static inline uint32_t 4102 arg_or_targ(const char *arg, const char *action) 4103 { 4104 uint32_t arg1 = arg_or_targ_relaxed(arg, action, IPFW_ARG_MAX); 4105 4106 if (arg1 == (uint32_t)(-1)) 4107 errx(EX_DATAERR, "illegal argument %s(%u) for %s", 4108 arg, arg1, action); 4109 return (arg1); 4110 } 4111 4112 static uint16_t 4113 get_divert_port(const char *arg, const char *action) 4114 { 4115 uint32_t arg1 = arg_or_targ_relaxed(arg, action, IPFW_ARG_MAX); 4116 4117 if (arg1 != (uint32_t)(-1)) 4118 return (arg1); 4119 4120 struct servent *s; 4121 setservent(1); 4122 s = getservbyname(arg, "divert"); 4123 if (s == NULL) 4124 errx(EX_DATAERR, "illegal divert/tee port"); 4125 return (ntohs(s->s_port)); 4126 } 4127 4128 /* 4129 * Parse arguments and assemble the microinstructions which make up a rule. 4130 * Rules are added into the 'rulebuf' and then copied in the correct order 4131 * into the actual rule. 4132 * 4133 * The syntax for a rule starts with the action, followed by 4134 * optional action parameters, and the various match patterns. 4135 * In the assembled microcode, the first opcode must be an O_PROBE_STATE 4136 * (generated if the rule includes a keep-state option), then the 4137 * various match patterns, log/altq actions, and the actual action. 4138 * 4139 */ 4140 static void 4141 compile_rule(char *av[], uint32_t *rbuf, int *rbufsize, struct tidx *tstate) 4142 { 4143 /* 4144 * rules are added into the 'rulebuf' and then copied in 4145 * the correct order into the actual rule. 4146 * Some things that need to go out of order (prob, action etc.) 4147 * go into actbuf[]. 4148 */ 4149 static uint32_t actbuf[255], cmdbuf[255]; 4150 int rblen, ablen, cblen; 4151 4152 ipfw_insn *src, *dst, *cmd, *action, *prev=NULL; 4153 ipfw_insn *first_cmd; /* first match pattern */ 4154 4155 struct ip_fw_rule *rule; 4156 4157 /* 4158 * various flags used to record that we entered some fields. 4159 */ 4160 ipfw_insn *have_state = NULL; /* any state-related option */ 4161 int have_rstate = 0; 4162 ipfw_insn *have_log = NULL, *have_altq = NULL, *have_tag = NULL; 4163 ipfw_insn *have_skipcmd = NULL; 4164 size_t len; 4165 4166 int i; 4167 4168 int open_par = 0; /* open parenthesis ( */ 4169 4170 /* proto is here because it is used to fetch ports */ 4171 u_char proto = IPPROTO_IP; /* default protocol */ 4172 4173 double match_prob = 1; /* match probability, default is always match */ 4174 4175 bzero(actbuf, sizeof(actbuf)); /* actions go here */ 4176 bzero(cmdbuf, sizeof(cmdbuf)); 4177 bzero(rbuf, *rbufsize); 4178 4179 rule = (struct ip_fw_rule *)rbuf; 4180 cmd = (ipfw_insn *)cmdbuf; 4181 action = (ipfw_insn *)actbuf; 4182 4183 rblen = *rbufsize / sizeof(uint32_t); 4184 rblen -= sizeof(struct ip_fw_rule) / sizeof(uint32_t); 4185 ablen = nitems(actbuf); 4186 cblen = nitems(cmdbuf); 4187 cblen -= F_INSN_SIZE(ipfw_insn_u32) + 1; 4188 4189 #define CHECK_RBUFLEN(len) { CHECK_LENGTH(rblen, len); rblen -= len; } 4190 #define CHECK_ACTLEN CHECK_LENGTH(ablen, action->len) 4191 4192 av++; 4193 4194 /* [rule N] -- Rule number optional */ 4195 if (av[0] && isdigit(**av)) { 4196 rule->rulenum = atoi(*av); 4197 av++; 4198 } 4199 4200 /* [set N] -- set number (0..RESVD_SET), optional */ 4201 if (av[0] && av[1] && _substrcmp(*av, "set") == 0) { 4202 int set = strtoul(av[1], NULL, 10); 4203 if (set < 0 || set > RESVD_SET) 4204 errx(EX_DATAERR, "illegal set %s", av[1]); 4205 rule->set = set; 4206 tstate->set = set; 4207 av += 2; 4208 } 4209 4210 /* [prob D] -- match probability, optional */ 4211 if (av[0] && av[1] && _substrcmp(*av, "prob") == 0) { 4212 match_prob = strtod(av[1], NULL); 4213 4214 if (match_prob <= 0 || match_prob > 1) 4215 errx(EX_DATAERR, "illegal match prob. %s", av[1]); 4216 av += 2; 4217 } 4218 4219 /* action -- mandatory */ 4220 NEED1("missing action"); 4221 i = match_token(rule_actions, *av); 4222 av++; 4223 action->len = 1; /* default */ 4224 CHECK_ACTLEN; 4225 switch(i) { 4226 case TOK_CHECKSTATE: 4227 have_state = action; 4228 action->opcode = O_CHECK_STATE; 4229 action->len = F_INSN_SIZE(ipfw_insn_kidx); 4230 CHECK_ACTLEN; 4231 if (*av == NULL || 4232 match_token(rule_options, *av) == TOK_COMMENT) { 4233 insntod(have_state, kidx)->kidx = pack_object(tstate, 4234 default_state_name, IPFW_TLV_STATE_NAME); 4235 break; 4236 } 4237 if (*av[0] == ':') { 4238 if (strcmp(*av + 1, "any") == 0) 4239 insntod(have_state, kidx)->kidx = 0; 4240 else if (state_check_name(*av + 1) == 0) 4241 insntod(have_state, kidx)->kidx = pack_object( 4242 tstate, *av + 1, IPFW_TLV_STATE_NAME); 4243 else 4244 errx(EX_DATAERR, "Invalid state name %s", 4245 *av); 4246 av++; 4247 break; 4248 } 4249 errx(EX_DATAERR, "Invalid state name %s", *av); 4250 break; 4251 4252 case TOK_ABORT: 4253 action->opcode = O_REJECT; 4254 action->arg1 = ICMP_REJECT_ABORT; 4255 break; 4256 4257 case TOK_ABORT6: 4258 action->opcode = O_UNREACH6; 4259 action->arg1 = ICMP6_UNREACH_ABORT; 4260 break; 4261 4262 case TOK_ACCEPT: 4263 action->opcode = O_ACCEPT; 4264 break; 4265 4266 case TOK_DENY: 4267 action->opcode = O_DENY; 4268 action->arg1 = 0; 4269 break; 4270 4271 case TOK_REJECT: 4272 action->opcode = O_REJECT; 4273 action->arg1 = ICMP_UNREACH_HOST; 4274 break; 4275 4276 case TOK_RESET: 4277 action->opcode = O_REJECT; 4278 action->arg1 = ICMP_REJECT_RST; 4279 break; 4280 4281 case TOK_RESET6: 4282 action->opcode = O_UNREACH6; 4283 action->arg1 = ICMP6_UNREACH_RST; 4284 break; 4285 4286 case TOK_UNREACH: 4287 action->opcode = O_REJECT; 4288 NEED1("missing reject code"); 4289 action->arg1 = get_reject_code(*av); 4290 av++; 4291 if (action->arg1 == ICMP_UNREACH_NEEDFRAG && isdigit(**av)) { 4292 uint16_t mtu; 4293 4294 mtu = strtoul(*av, NULL, 10); 4295 if (mtu < 68 || mtu >= IP_MAXPACKET) 4296 errx(EX_DATAERR, "illegal argument for %s", 4297 *(av - 1)); 4298 action->len = F_INSN_SIZE(ipfw_insn_u16); 4299 insntod(action, u16)->ports[0] = mtu; 4300 av++; 4301 } 4302 break; 4303 4304 case TOK_UNREACH6: 4305 action->opcode = O_UNREACH6; 4306 NEED1("missing unreach code"); 4307 action->arg1 = get_unreach6_code(*av); 4308 av++; 4309 break; 4310 4311 case TOK_COUNT: 4312 action->opcode = O_COUNT; 4313 break; 4314 4315 case TOK_NAT: 4316 action->opcode = O_NAT; 4317 action->len = F_INSN_SIZE(ipfw_insn_nat); 4318 CHECK_ACTLEN; 4319 if (*av != NULL && _substrcmp(*av, "global") == 0) 4320 action->arg1 = IP_FW_NAT44_GLOBAL; 4321 else 4322 action->arg1 = arg_or_targ(av[0], *(av - 1)); 4323 av++; 4324 break; 4325 case TOK_QUEUE: 4326 action->opcode = O_QUEUE; 4327 action->arg1 = arg_or_targ(av[0], *(av - 1)); 4328 av++; 4329 break; 4330 case TOK_PIPE: 4331 action->opcode = O_PIPE; 4332 action->arg1 = arg_or_targ(av[0], *(av - 1)); 4333 av++; 4334 break; 4335 case TOK_SKIPTO: 4336 action->opcode = O_SKIPTO; 4337 action->len = F_INSN_SIZE(ipfw_insn_u32); 4338 CHECK_ACTLEN; 4339 insntod(action, u32)->d[0] = 4340 arg_or_targ_relaxed(av[0], *(av - 1), IPFW_DEFAULT_RULE); 4341 av++; 4342 break; 4343 case TOK_NETGRAPH: 4344 action->opcode = O_NETGRAPH; 4345 action->arg1 = arg_or_targ(av[0], *(av - 1)); 4346 av++; 4347 break; 4348 case TOK_NGTEE: 4349 action->opcode = O_NGTEE; 4350 action->arg1 = arg_or_targ(av[0], *(av - 1)); 4351 av++; 4352 break; 4353 case TOK_DIVERT: 4354 action->opcode = O_DIVERT; 4355 action->arg1 = get_divert_port(av[0], *(av - 1)); 4356 av++; 4357 break; 4358 case TOK_TEE: 4359 action->opcode = O_TEE; 4360 action->arg1 = get_divert_port(av[0], *(av - 1)); 4361 av++; 4362 break; 4363 case TOK_CALL: 4364 action->opcode = O_CALLRETURN; 4365 action->len = F_INSN_SIZE(ipfw_insn_u32); 4366 CHECK_ACTLEN; 4367 insntod(action, u32)->d[0] = 4368 arg_or_targ_relaxed(av[0], *(av - 1), IPFW_DEFAULT_RULE); 4369 av++; 4370 break; 4371 4372 case TOK_FORWARD: { 4373 /* 4374 * Locate the address-port separator (':' or ','). 4375 * Could be one of the following: 4376 * hostname:port 4377 * IPv4 a.b.c.d,port 4378 * IPv4 a.b.c.d:port 4379 * IPv6 w:x:y::z,port 4380 * IPv6 [w:x:y::z]:port 4381 */ 4382 struct sockaddr_storage result; 4383 struct addrinfo *res; 4384 char *s, *end; 4385 int family; 4386 u_short port_number = 0; 4387 4388 NEED1("missing forward address[:port]"); 4389 4390 if (strncmp(*av, "tablearg", 8) == 0 && 4391 ((*av)[8] == '\0' || (*av)[8] == ',' || (*av)[8] == ':')) 4392 memcpy(++(*av), "0.0.0.0", 7); 4393 4394 /* 4395 * Are we an bracket-enclosed IPv6 address? 4396 */ 4397 if (strchr(*av, '[')) 4398 (*av)++; 4399 4400 /* 4401 * locate the address-port separator (':' or ',') 4402 */ 4403 s = strchr(*av, ','); 4404 if (s == NULL) { 4405 s = strchr(*av, ']'); 4406 /* Prevent erroneous parsing on brackets. */ 4407 if (s != NULL) 4408 *(s++) = '\0'; 4409 else 4410 s = *av; 4411 4412 /* Distinguish between IPv4:port and IPv6 cases. */ 4413 s = strchr(s, ':'); 4414 if (s && strchr(s+1, ':')) 4415 s = NULL; /* no port */ 4416 } 4417 4418 if (s != NULL) { 4419 /* Terminate host portion and set s to start of port. */ 4420 *(s++) = '\0'; 4421 i = strtoport(s, &end, 0 /* base */, 0 /* proto */); 4422 if (s == end) 4423 errx(EX_DATAERR, 4424 "illegal forwarding port ``%s''", s); 4425 port_number = (u_short)i; 4426 } 4427 4428 /* 4429 * Resolve the host name or address to a family and a 4430 * network representation of the address. 4431 */ 4432 if (getaddrinfo(*av, NULL, NULL, &res)) 4433 errx(EX_DATAERR, NULL); 4434 /* Just use the first host in the answer. */ 4435 family = res->ai_family; 4436 memcpy(&result, res->ai_addr, res->ai_addrlen); 4437 freeaddrinfo(res); 4438 4439 if (family == PF_INET) { 4440 ipfw_insn_sa *p = (ipfw_insn_sa *)action; 4441 4442 action->opcode = O_FORWARD_IP; 4443 action->len = F_INSN_SIZE(ipfw_insn_sa); 4444 CHECK_ACTLEN; 4445 4446 /* 4447 * In the kernel we assume AF_INET and use only 4448 * sin_port and sin_addr. Remember to set sin_len as 4449 * the routing code seems to use it too. 4450 */ 4451 p->sa.sin_len = sizeof(struct sockaddr_in); 4452 p->sa.sin_family = AF_INET; 4453 p->sa.sin_port = port_number; 4454 p->sa.sin_addr.s_addr = 4455 ((struct sockaddr_in *)&result)->sin_addr.s_addr; 4456 } else if (family == PF_INET6) { 4457 ipfw_insn_sa6 *p = (ipfw_insn_sa6 *)action; 4458 4459 action->opcode = O_FORWARD_IP6; 4460 action->len = F_INSN_SIZE(ipfw_insn_sa6); 4461 CHECK_ACTLEN; 4462 4463 p->sa.sin6_len = sizeof(struct sockaddr_in6); 4464 p->sa.sin6_family = AF_INET6; 4465 p->sa.sin6_port = port_number; 4466 p->sa.sin6_flowinfo = 0; 4467 p->sa.sin6_scope_id = 4468 ((struct sockaddr_in6 *)&result)->sin6_scope_id; 4469 bcopy(&((struct sockaddr_in6*)&result)->sin6_addr, 4470 &p->sa.sin6_addr, sizeof(p->sa.sin6_addr)); 4471 } else { 4472 errx(EX_DATAERR, "Invalid address family in forward action"); 4473 } 4474 av++; 4475 break; 4476 } 4477 case TOK_COMMENT: 4478 /* pretend it is a 'count' rule followed by the comment */ 4479 action->opcode = O_COUNT; 4480 av--; /* go back... */ 4481 break; 4482 4483 case TOK_SETFIB: 4484 { 4485 int numfibs; 4486 size_t intsize = sizeof(int); 4487 4488 action->opcode = O_SETFIB; 4489 NEED1("missing fib number"); 4490 if (_substrcmp(*av, "tablearg") == 0) { 4491 action->arg1 = IP_FW_TARG; 4492 } else { 4493 action->arg1 = strtoul(*av, NULL, 10); 4494 if (sysctlbyname("net.fibs", &numfibs, &intsize, 4495 NULL, 0) == -1) 4496 errx(EX_DATAERR, "fibs not supported.\n"); 4497 if (action->arg1 >= numfibs) /* Temporary */ 4498 errx(EX_DATAERR, "fib too large.\n"); 4499 /* Add high-order bit to fib to make room for tablearg*/ 4500 action->arg1 |= 0x8000; 4501 } 4502 av++; 4503 break; 4504 } 4505 4506 case TOK_SETDSCP: 4507 { 4508 int code; 4509 4510 action->opcode = O_SETDSCP; 4511 NEED1("missing DSCP code"); 4512 if (_substrcmp(*av, "tablearg") == 0) { 4513 action->arg1 = IP_FW_TARG; 4514 } else { 4515 if (isalpha(*av[0])) { 4516 if ((code = match_token(f_ipdscp, *av)) == -1) 4517 errx(EX_DATAERR, "Unknown DSCP code"); 4518 action->arg1 = code; 4519 } else 4520 action->arg1 = strtoul(*av, NULL, 10); 4521 /* 4522 * Add high-order bit to DSCP to make room 4523 * for tablearg 4524 */ 4525 action->arg1 |= 0x8000; 4526 } 4527 av++; 4528 break; 4529 } 4530 4531 case TOK_REASS: 4532 action->opcode = O_REASS; 4533 break; 4534 4535 case TOK_RETURN: 4536 action->opcode = O_CALLRETURN; 4537 action->len = F_INSN_SIZE(ipfw_insn_u32) | F_NOT; 4538 CHECK_ACTLEN; 4539 if (*av != NULL) { 4540 /* 4541 * Return type is optional. 4542 * By default we use RETURN_NEXT_RULENUM. 4543 */ 4544 i = match_token(return_types, *av); 4545 if (i >= 0) { 4546 action->arg1 = i; 4547 av++; 4548 } else 4549 action->arg1 = RETURN_NEXT_RULENUM; 4550 } 4551 break; 4552 4553 case TOK_SETMARK: { 4554 action->opcode = O_SETMARK; 4555 action->len = F_INSN_SIZE(ipfw_insn_u32); 4556 NEED1("missing mark"); 4557 if (strcmp(*av, "tablearg") == 0) { 4558 action->arg1 = IP_FW_TARG; 4559 } else { 4560 insntod(action, u32)->d[0] = strtoul(*av, NULL, 0); 4561 /* This is not a tablearg */ 4562 action->arg1 |= 0x8000; 4563 } 4564 av++; 4565 CHECK_CMDLEN; 4566 break; 4567 } 4568 4569 case TOK_TCPSETMSS: { 4570 u_long mss; 4571 uint32_t idx; 4572 4573 idx = pack_object(tstate, "tcp-setmss", IPFW_TLV_EACTION); 4574 if (idx == 0) 4575 errx(EX_DATAERR, "pack_object failed"); 4576 action->opcode = O_EXTERNAL_ACTION; 4577 action->len = F_INSN_SIZE(ipfw_insn_kidx); 4578 CHECK_ACTLEN; 4579 insntod(action, kidx)->kidx = idx; 4580 4581 NEED1("Missing MSS value"); 4582 action = next_cmd(action, &ablen); 4583 action->len = 1; 4584 CHECK_ACTLEN; 4585 mss = strtoul(*av, NULL, 10); 4586 if (mss == 0 || mss > UINT16_MAX) 4587 errx(EX_USAGE, "invalid MSS value %s", *av); 4588 fill_cmd(action, O_EXTERNAL_DATA, 0, (uint16_t)mss); 4589 av++; 4590 break; 4591 } 4592 4593 default: 4594 av--; 4595 if (match_token(rule_eactions, *av) == -1) 4596 errx(EX_DATAERR, "invalid action %s\n", *av); 4597 /* 4598 * External actions support. 4599 * XXX: we support only syntax with instance name. 4600 * For known external actions (from rule_eactions list) 4601 * we can handle syntax directly. But with `eaction' 4602 * keyword we can use only `eaction <name> <instance>' 4603 * syntax. 4604 */ 4605 case TOK_EACTION: { 4606 uint32_t idx; 4607 4608 NEED1("Missing eaction name"); 4609 if (eaction_check_name(*av) != 0) 4610 errx(EX_DATAERR, "Invalid eaction name %s", *av); 4611 idx = pack_object(tstate, *av, IPFW_TLV_EACTION); 4612 if (idx == 0) 4613 errx(EX_DATAERR, "pack_object failed"); 4614 action->opcode = O_EXTERNAL_ACTION; 4615 action->len = F_INSN_SIZE(ipfw_insn_kidx); 4616 CHECK_ACTLEN; 4617 insntod(action, kidx)->kidx = idx; 4618 4619 av++; 4620 NEED1("Missing eaction instance name"); 4621 if (eaction_check_name(*av) != 0) 4622 errx(EX_DATAERR, "Invalid eaction instance name %s", 4623 *av); 4624 /* 4625 * External action instance object has TLV type depended 4626 * from the external action name object index. Since we 4627 * currently don't know this index, use zero as TLV type. 4628 */ 4629 idx = pack_object(tstate, *av, 0); 4630 if (idx == 0) 4631 errx(EX_DATAERR, "pack_object failed"); 4632 action = next_cmd(action, &ablen); 4633 action->opcode = O_EXTERNAL_INSTANCE; 4634 action->len = F_INSN_SIZE(ipfw_insn_kidx); 4635 CHECK_ACTLEN; 4636 insntod(action, kidx)->kidx = idx; 4637 av++; 4638 } 4639 } 4640 action = next_cmd(action, &ablen); 4641 4642 /* 4643 * [altq queuename] -- altq tag, optional 4644 * [log [logamount N]] -- log, optional 4645 * 4646 * If they exist, it go first in the cmdbuf, but then it is 4647 * skipped in the copy section to the end of the buffer. 4648 */ 4649 while (av[0] != NULL && (i = match_token(rule_action_params, *av)) != -1) { 4650 av++; 4651 switch (i) { 4652 case TOK_LOG: 4653 { 4654 ipfw_insn_log *c = (ipfw_insn_log *)cmd; 4655 int l; 4656 4657 if (have_log) 4658 errx(EX_DATAERR, 4659 "log cannot be specified more than once"); 4660 have_log = (ipfw_insn *)c; 4661 cmd->len = F_INSN_SIZE(ipfw_insn_log); 4662 CHECK_CMDLEN; 4663 cmd->opcode = O_LOG; 4664 cmd->arg1 = IPFW_LOG_DEFAULT; 4665 /* logdst before logamount */ 4666 if (av[0] && _substrcmp(*av, "logdst") == 0) { 4667 av++; 4668 NEED1("logdst requires argument"); 4669 cmd->arg1 = parse_logdst(*av); 4670 av++; 4671 } 4672 4673 if (av[0] && _substrcmp(*av, "logamount") == 0) { 4674 av++; 4675 NEED1("logamount requires argument"); 4676 l = atoi(*av); 4677 if (l < 0) 4678 errx(EX_DATAERR, 4679 "logamount must be positive"); 4680 c->max_log = l; 4681 av++; 4682 } else { 4683 len = sizeof(c->max_log); 4684 if (sysctlbyname("net.inet.ip.fw.verbose_limit", 4685 &c->max_log, &len, NULL, 0) == -1) { 4686 if (g_co.test_only) { 4687 c->max_log = 0; 4688 break; 4689 } 4690 errx(1, "sysctlbyname(\"%s\")", 4691 "net.inet.ip.fw.verbose_limit"); 4692 } 4693 } 4694 4695 /* logdst after logamount */ 4696 if (av[0] && _substrcmp(*av, "logdst") == 0) { 4697 av++; 4698 NEED1("logdst requires argument"); 4699 cmd->arg1 = parse_logdst(*av); 4700 av++; 4701 } 4702 } 4703 break; 4704 4705 #ifndef NO_ALTQ 4706 case TOK_ALTQ: 4707 { 4708 ipfw_insn_altq *a = (ipfw_insn_altq *)cmd; 4709 4710 NEED1("missing altq queue name"); 4711 if (have_altq) 4712 errx(EX_DATAERR, 4713 "altq cannot be specified more than once"); 4714 have_altq = (ipfw_insn *)a; 4715 cmd->len = F_INSN_SIZE(ipfw_insn_altq); 4716 CHECK_CMDLEN; 4717 cmd->opcode = O_ALTQ; 4718 a->qid = altq_name_to_qid(*av); 4719 av++; 4720 } 4721 break; 4722 #endif 4723 4724 case TOK_TAG: 4725 case TOK_UNTAG: { 4726 uint16_t tag; 4727 4728 if (have_tag) 4729 errx(EX_USAGE, "tag and untag cannot be " 4730 "specified more than once"); 4731 GET_UINT_ARG(tag, IPFW_ARG_MIN, IPFW_ARG_MAX, i, 4732 rule_action_params); 4733 have_tag = cmd; 4734 fill_cmd(cmd, O_TAG, (i == TOK_TAG) ? 0: F_NOT, tag); 4735 av++; 4736 break; 4737 } 4738 4739 default: 4740 abort(); 4741 } 4742 cmd = next_cmd(cmd, &cblen); 4743 } 4744 4745 if (have_state) { /* must be a check-state, we are done */ 4746 if (*av != NULL && 4747 match_token(rule_options, *av) == TOK_COMMENT) { 4748 /* check-state has a comment */ 4749 av++; 4750 fill_comment(cmd, av, cblen); 4751 cmd = next_cmd(cmd, &cblen); 4752 av[0] = NULL; 4753 } 4754 goto done; 4755 } 4756 4757 #define OR_START(target) \ 4758 if (av[0] && (*av[0] == '(' || *av[0] == '{')) { \ 4759 if (open_par) \ 4760 errx(EX_USAGE, "nested \"(\" not allowed\n"); \ 4761 prev = NULL; \ 4762 open_par = 1; \ 4763 if ( (av[0])[1] == '\0') { \ 4764 av++; \ 4765 } else \ 4766 (*av)++; \ 4767 } \ 4768 target: \ 4769 4770 4771 #define CLOSE_PAR \ 4772 if (open_par) { \ 4773 if (av[0] && ( \ 4774 strcmp(*av, ")") == 0 || \ 4775 strcmp(*av, "}") == 0)) { \ 4776 prev = NULL; \ 4777 open_par = 0; \ 4778 av++; \ 4779 } else \ 4780 errx(EX_USAGE, "missing \")\"\n"); \ 4781 } 4782 4783 #define NOT_BLOCK \ 4784 if (av[0] && _substrcmp(*av, "not") == 0) { \ 4785 if (cmd->len & F_NOT) \ 4786 errx(EX_USAGE, "double \"not\" not allowed\n"); \ 4787 cmd->len |= F_NOT; \ 4788 av++; \ 4789 } 4790 4791 #define OR_BLOCK(target) \ 4792 if (av[0] && _substrcmp(*av, "or") == 0) { \ 4793 if (prev == NULL || open_par == 0) \ 4794 errx(EX_DATAERR, "invalid OR block"); \ 4795 prev->len |= F_OR; \ 4796 av++; \ 4797 goto target; \ 4798 } \ 4799 CLOSE_PAR; 4800 4801 first_cmd = cmd; 4802 4803 #if 0 4804 /* 4805 * MAC addresses, optional. 4806 * If we have this, we skip the part "proto from src to dst" 4807 * and jump straight to the option parsing. 4808 */ 4809 NOT_BLOCK; 4810 NEED1("missing protocol"); 4811 if (_substrcmp(*av, "MAC") == 0 || 4812 _substrcmp(*av, "mac") == 0) { 4813 av++; /* the "MAC" keyword */ 4814 add_mac(cmd, av); /* exits in case of errors */ 4815 cmd = next_cmd(cmd); 4816 av += 2; /* dst-mac and src-mac */ 4817 NOT_BLOCK; 4818 NEED1("missing mac type"); 4819 if (add_mactype(cmd, av[0])) 4820 cmd = next_cmd(cmd); 4821 av++; /* any or mac-type */ 4822 goto read_options; 4823 } 4824 #endif 4825 4826 /* 4827 * protocol, mandatory 4828 */ 4829 OR_START(get_proto); 4830 NOT_BLOCK; 4831 NEED1("missing protocol"); 4832 if (add_proto_compat(cmd, *av, &proto)) { 4833 av++; 4834 if (F_LEN(cmd) != 0) { 4835 prev = cmd; 4836 cmd = next_cmd(cmd, &cblen); 4837 } 4838 } else if (first_cmd != cmd) { 4839 errx(EX_DATAERR, "invalid protocol ``%s''", *av); 4840 } else { 4841 rule->flags |= IPFW_RULE_JUSTOPTS; 4842 goto read_options; 4843 } 4844 OR_BLOCK(get_proto); 4845 4846 first_cmd = cmd; /* update pointer to use in compact form */ 4847 4848 /* 4849 * "from", mandatory 4850 */ 4851 if ((av[0] == NULL) || _substrcmp(*av, "from") != 0) 4852 errx(EX_USAGE, "missing ``from''"); 4853 av++; 4854 4855 /* 4856 * source IP, mandatory 4857 */ 4858 OR_START(source_ip); 4859 NOT_BLOCK; /* optional "not" */ 4860 NEED1("missing source address"); 4861 if (add_src(cmd, *av, proto, cblen, tstate)) { 4862 av++; 4863 if (F_LEN(cmd) != 0) { /* ! any */ 4864 prev = cmd; 4865 cmd = next_cmd(cmd, &cblen); 4866 } 4867 } else 4868 errx(EX_USAGE, "bad source address %s", *av); 4869 OR_BLOCK(source_ip); 4870 4871 /* 4872 * source ports, optional 4873 */ 4874 NOT_BLOCK; /* optional "not" */ 4875 if ( av[0] != NULL ) { 4876 if (_substrcmp(*av, "any") == 0 || 4877 add_ports(cmd, *av, proto, O_IP_SRCPORT, cblen)) { 4878 av++; 4879 if (F_LEN(cmd) != 0) 4880 cmd = next_cmd(cmd, &cblen); 4881 } 4882 } 4883 4884 /* 4885 * "to", mandatory 4886 */ 4887 if ( (av[0] == NULL) || _substrcmp(*av, "to") != 0 ) 4888 errx(EX_USAGE, "missing ``to''"); 4889 av++; 4890 4891 /* 4892 * destination, mandatory 4893 */ 4894 OR_START(dest_ip); 4895 NOT_BLOCK; /* optional "not" */ 4896 NEED1("missing dst address"); 4897 if (add_dst(cmd, *av, proto, cblen, tstate)) { 4898 av++; 4899 if (F_LEN(cmd) != 0) { /* ! any */ 4900 prev = cmd; 4901 cmd = next_cmd(cmd, &cblen); 4902 } 4903 } else 4904 errx( EX_USAGE, "bad destination address %s", *av); 4905 OR_BLOCK(dest_ip); 4906 4907 /* 4908 * dest. ports, optional 4909 */ 4910 NOT_BLOCK; /* optional "not" */ 4911 if (av[0]) { 4912 if (_substrcmp(*av, "any") == 0 || 4913 add_ports(cmd, *av, proto, O_IP_DSTPORT, cblen)) { 4914 av++; 4915 if (F_LEN(cmd) != 0) 4916 cmd = next_cmd(cmd, &cblen); 4917 } 4918 } 4919 if (first_cmd == cmd) 4920 rule->flags |= IPFW_RULE_NOOPT; 4921 4922 read_options: 4923 prev = NULL; 4924 while ( av[0] != NULL ) { 4925 char *s; 4926 ipfw_insn_u32 *cmd32; /* alias for cmd */ 4927 4928 s = *av; 4929 cmd32 = (ipfw_insn_u32 *)cmd; 4930 4931 if (*s == '!') { /* alternate syntax for NOT */ 4932 if (cmd->len & F_NOT) 4933 errx(EX_USAGE, "double \"not\" not allowed\n"); 4934 cmd->len = F_NOT; 4935 s++; 4936 } 4937 i = match_token(rule_options, s); 4938 av++; 4939 switch(i) { 4940 case TOK_NOT: 4941 if (cmd->len & F_NOT) 4942 errx(EX_USAGE, "double \"not\" not allowed\n"); 4943 cmd->len = F_NOT; 4944 break; 4945 4946 case TOK_OR: 4947 if (open_par == 0 || prev == NULL) 4948 errx(EX_USAGE, "invalid \"or\" block\n"); 4949 prev->len |= F_OR; 4950 break; 4951 4952 case TOK_STARTBRACE: 4953 if (open_par) 4954 errx(EX_USAGE, "+nested \"(\" not allowed\n"); 4955 open_par = 1; 4956 break; 4957 4958 case TOK_ENDBRACE: 4959 if (!open_par) 4960 errx(EX_USAGE, "+missing \")\"\n"); 4961 open_par = 0; 4962 prev = NULL; 4963 break; 4964 4965 case TOK_IN: 4966 fill_cmd(cmd, O_IN, 0, 0); 4967 break; 4968 4969 case TOK_OUT: 4970 cmd->len ^= F_NOT; /* toggle F_NOT */ 4971 fill_cmd(cmd, O_IN, 0, 0); 4972 break; 4973 4974 case TOK_DIVERTED: 4975 fill_cmd(cmd, O_DIVERTED, 0, 3); 4976 break; 4977 4978 case TOK_DIVERTEDLOOPBACK: 4979 fill_cmd(cmd, O_DIVERTED, 0, 1); 4980 break; 4981 4982 case TOK_DIVERTEDOUTPUT: 4983 fill_cmd(cmd, O_DIVERTED, 0, 2); 4984 break; 4985 4986 case TOK_FRAG: { 4987 uint32_t set = 0, clear = 0; 4988 4989 if (*av != NULL && fill_flags(f_ipoff, *av, NULL, 4990 &set, &clear) == 0) 4991 av++; 4992 else { 4993 /* 4994 * Compatibility: no argument after "frag" 4995 * keyword equals to "frag offset". 4996 */ 4997 set = 0x01; 4998 clear = 0; 4999 } 5000 fill_cmd(cmd, O_FRAG, 0, 5001 (set & 0xff) | ( (clear & 0xff) << 8)); 5002 break; 5003 } 5004 5005 case TOK_LAYER2: 5006 fill_cmd(cmd, O_LAYER2, 0, 0); 5007 break; 5008 5009 case TOK_XMIT: 5010 case TOK_RECV: 5011 case TOK_VIA: 5012 NEED1("recv, xmit, via require interface name" 5013 " or address"); 5014 fill_iface(insntod(cmd, if), av[0], cblen, tstate); 5015 av++; 5016 if (F_LEN(cmd) == 0) /* not a valid address */ 5017 break; 5018 if (i == TOK_XMIT) 5019 cmd->opcode = O_XMIT; 5020 else if (i == TOK_RECV) 5021 cmd->opcode = O_RECV; 5022 else if (i == TOK_VIA) 5023 cmd->opcode = O_VIA; 5024 break; 5025 5026 case TOK_ICMPTYPES: 5027 NEED1("icmptypes requires list of types"); 5028 fill_icmptypes((ipfw_insn_u32 *)cmd, *av); 5029 av++; 5030 break; 5031 5032 case TOK_ICMP6TYPES: 5033 NEED1("icmptypes requires list of types"); 5034 fill_icmp6types((ipfw_insn_icmp6 *)cmd, *av, cblen); 5035 av++; 5036 break; 5037 5038 case TOK_IPTTL: 5039 NEED1("ipttl requires TTL"); 5040 if (strpbrk(*av, "-,")) { 5041 if (!add_ports(cmd, *av, 0, O_IPTTL, cblen)) 5042 errx(EX_DATAERR, "invalid ipttl %s", *av); 5043 } else 5044 fill_cmd(cmd, O_IPTTL, 0, strtoul(*av, NULL, 0)); 5045 av++; 5046 break; 5047 5048 case TOK_IPID: 5049 NEED1("ipid requires id"); 5050 if (strpbrk(*av, "-,")) { 5051 if (!add_ports(cmd, *av, 0, O_IPID, cblen)) 5052 errx(EX_DATAERR, "invalid ipid %s", *av); 5053 } else 5054 fill_cmd(cmd, O_IPID, 0, strtoul(*av, NULL, 0)); 5055 av++; 5056 break; 5057 5058 case TOK_IPLEN: 5059 NEED1("iplen requires length"); 5060 if (strpbrk(*av, "-,")) { 5061 if (!add_ports(cmd, *av, 0, O_IPLEN, cblen)) 5062 errx(EX_DATAERR, "invalid ip len %s", *av); 5063 } else 5064 fill_cmd(cmd, O_IPLEN, 0, strtoul(*av, NULL, 0)); 5065 av++; 5066 break; 5067 5068 case TOK_IPVER: 5069 NEED1("ipver requires version"); 5070 fill_cmd(cmd, O_IPVER, 0, strtoul(*av, NULL, 0)); 5071 av++; 5072 break; 5073 5074 case TOK_IPPRECEDENCE: 5075 NEED1("ipprecedence requires value"); 5076 fill_cmd(cmd, O_IPPRECEDENCE, 0, 5077 (strtoul(*av, NULL, 0) & 7) << 5); 5078 av++; 5079 break; 5080 5081 case TOK_DSCP: 5082 NEED1("missing DSCP code"); 5083 fill_dscp(cmd, *av, cblen); 5084 av++; 5085 break; 5086 5087 case TOK_IPOPTS: 5088 NEED1("missing argument for ipoptions"); 5089 fill_flags_cmd(cmd, O_IPOPT, f_ipopts, *av); 5090 av++; 5091 break; 5092 5093 case TOK_IPTOS: 5094 NEED1("missing argument for iptos"); 5095 fill_flags_cmd(cmd, O_IPTOS, f_iptos, *av); 5096 av++; 5097 break; 5098 5099 case TOK_UID: 5100 NEED1("uid requires argument"); 5101 { 5102 char *end; 5103 uid_t uid; 5104 struct passwd *pwd; 5105 5106 cmd->opcode = O_UID; 5107 uid = strtoul(*av, &end, 0); 5108 pwd = (*end == '\0') ? getpwuid(uid) : getpwnam(*av); 5109 if (pwd == NULL) 5110 errx(EX_DATAERR, "uid \"%s\" nonexistent", *av); 5111 cmd32->d[0] = pwd->pw_uid; 5112 cmd->len |= F_INSN_SIZE(ipfw_insn_u32); 5113 av++; 5114 } 5115 break; 5116 5117 case TOK_GID: 5118 NEED1("gid requires argument"); 5119 { 5120 char *end; 5121 gid_t gid; 5122 struct group *grp; 5123 5124 cmd->opcode = O_GID; 5125 gid = strtoul(*av, &end, 0); 5126 grp = (*end == '\0') ? getgrgid(gid) : getgrnam(*av); 5127 if (grp == NULL) 5128 errx(EX_DATAERR, "gid \"%s\" nonexistent", *av); 5129 cmd32->d[0] = grp->gr_gid; 5130 cmd->len |= F_INSN_SIZE(ipfw_insn_u32); 5131 av++; 5132 } 5133 break; 5134 5135 case TOK_JAIL: 5136 NEED1("jail requires argument"); 5137 { 5138 char *end; 5139 int jid; 5140 5141 cmd->opcode = O_JAIL; 5142 /* 5143 * If av is a number, then we'll just pass it as-is. If 5144 * it's a name, try to resolve that to a jid. 5145 * 5146 * We save the jail_getid(3) call for a fallback because 5147 * it entails an unconditional trip to the kernel to 5148 * either validate a jid or resolve a name to a jid. 5149 * This specific token doesn't currently require a 5150 * jid to be an active jail, so we save a transition 5151 * by simply using a number that we're given. 5152 */ 5153 jid = strtoul(*av, &end, 10); 5154 if (*end != '\0') { 5155 jid = jail_getid(*av); 5156 if (jid < 0) 5157 errx(EX_DATAERR, "%s", jail_errmsg); 5158 } 5159 cmd32->d[0] = (uint32_t)jid; 5160 cmd->len |= F_INSN_SIZE(ipfw_insn_u32); 5161 av++; 5162 } 5163 break; 5164 5165 case TOK_ESTAB: 5166 fill_cmd(cmd, O_ESTAB, 0, 0); 5167 break; 5168 5169 case TOK_SETUP: 5170 fill_cmd(cmd, O_TCPFLAGS, 0, 5171 (TH_SYN) | ( (TH_ACK) & 0xff) <<8 ); 5172 break; 5173 5174 case TOK_TCPDATALEN: 5175 NEED1("tcpdatalen requires length"); 5176 if (strpbrk(*av, "-,")) { 5177 if (!add_ports(cmd, *av, 0, O_TCPDATALEN, cblen)) 5178 errx(EX_DATAERR, "invalid tcpdata len %s", *av); 5179 } else 5180 fill_cmd(cmd, O_TCPDATALEN, 0, 5181 strtoul(*av, NULL, 0)); 5182 av++; 5183 break; 5184 5185 case TOK_TCPOPTS: 5186 NEED1("missing argument for tcpoptions"); 5187 fill_flags_cmd(cmd, O_TCPOPTS, f_tcpopts, *av); 5188 av++; 5189 break; 5190 5191 case TOK_TCPSEQ: 5192 case TOK_TCPACK: 5193 NEED1("tcpseq/tcpack requires argument"); 5194 cmd->len = F_INSN_SIZE(ipfw_insn_u32); 5195 cmd->opcode = (i == TOK_TCPSEQ) ? O_TCPSEQ : O_TCPACK; 5196 cmd32->d[0] = htonl(strtoul(*av, NULL, 0)); 5197 av++; 5198 break; 5199 5200 case TOK_TCPMSS: 5201 case TOK_TCPWIN: 5202 NEED1("tcpmss/tcpwin requires size"); 5203 if (strpbrk(*av, "-,")) { 5204 if (add_ports(cmd, *av, 0, 5205 i == TOK_TCPWIN ? O_TCPWIN : O_TCPMSS, 5206 cblen) == NULL) 5207 errx(EX_DATAERR, "invalid %s size %s", 5208 s, *av); 5209 } else 5210 fill_cmd(cmd, i == TOK_TCPWIN ? O_TCPWIN : 5211 O_TCPMSS, 0, strtoul(*av, NULL, 0)); 5212 av++; 5213 break; 5214 5215 case TOK_TCPFLAGS: 5216 NEED1("missing argument for tcpflags"); 5217 cmd->opcode = O_TCPFLAGS; 5218 fill_flags_cmd(cmd, O_TCPFLAGS, f_tcpflags, *av); 5219 av++; 5220 break; 5221 5222 case TOK_KEEPSTATE: 5223 case TOK_RECORDSTATE: { 5224 uint32_t uidx; 5225 5226 if (open_par) 5227 errx(EX_USAGE, "keep-state or record-state cannot be part " 5228 "of an or block"); 5229 if (have_state) 5230 errx(EX_USAGE, "only one of keep-state, record-state, " 5231 " limit and set-limit is allowed"); 5232 if (*av != NULL && *av[0] == ':') { 5233 if (state_check_name(*av + 1) != 0) 5234 errx(EX_DATAERR, 5235 "Invalid state name %s", *av); 5236 uidx = pack_object(tstate, *av + 1, 5237 IPFW_TLV_STATE_NAME); 5238 av++; 5239 } else 5240 uidx = pack_object(tstate, default_state_name, 5241 IPFW_TLV_STATE_NAME); 5242 have_state = cmd; 5243 have_rstate = i == TOK_RECORDSTATE; 5244 cmd->opcode = O_KEEP_STATE; 5245 cmd->len = F_INSN_SIZE(ipfw_insn_kidx); 5246 CHECK_CMDLEN; 5247 insntod(have_state, kidx)->kidx = uidx; 5248 break; 5249 } 5250 5251 case TOK_LIMIT: 5252 case TOK_SETLIMIT: { 5253 ipfw_insn_limit *c = insntod(cmd, limit); 5254 int val; 5255 5256 if (open_par) 5257 errx(EX_USAGE, 5258 "limit or set-limit cannot be part of an or block"); 5259 if (have_state) 5260 errx(EX_USAGE, "only one of keep-state, record-state, " 5261 " limit and set-limit is allowed"); 5262 have_state = cmd; 5263 have_rstate = i == TOK_SETLIMIT; 5264 5265 cmd->opcode = O_LIMIT; 5266 cmd->len = F_INSN_SIZE(ipfw_insn_limit); 5267 CHECK_CMDLEN; 5268 c->limit_mask = c->conn_limit = c->kidx = 0; 5269 5270 while ( av[0] != NULL ) { 5271 if ((val = match_token(limit_masks, *av)) <= 0) 5272 break; 5273 c->limit_mask |= val; 5274 av++; 5275 } 5276 5277 if (c->limit_mask == 0) 5278 errx(EX_USAGE, "limit: missing limit mask"); 5279 5280 GET_UINT_ARG(c->conn_limit, IPFW_ARG_MIN, IPFW_ARG_MAX, 5281 TOK_LIMIT, rule_options); 5282 av++; 5283 5284 if (*av != NULL && *av[0] == ':') { 5285 if (state_check_name(*av + 1) != 0) 5286 errx(EX_DATAERR, 5287 "Invalid state name %s", *av); 5288 c->kidx = pack_object(tstate, *av + 1, 5289 IPFW_TLV_STATE_NAME); 5290 av++; 5291 } else 5292 c->kidx = pack_object(tstate, 5293 default_state_name, IPFW_TLV_STATE_NAME); 5294 break; 5295 } 5296 5297 case TOK_PROTO: 5298 NEED1("missing protocol"); 5299 if (add_proto(cmd, *av, &proto)) { 5300 av++; 5301 } else 5302 errx(EX_DATAERR, "invalid protocol ``%s''", 5303 *av); 5304 break; 5305 5306 case TOK_SRCIP: 5307 NEED1("missing source IP"); 5308 if (add_srcip(cmd, *av, cblen, tstate)) { 5309 av++; 5310 } 5311 break; 5312 5313 case TOK_DSTIP: 5314 NEED1("missing destination IP"); 5315 if (add_dstip(cmd, *av, cblen, tstate)) { 5316 av++; 5317 } 5318 break; 5319 5320 case TOK_SRCIP6: 5321 NEED1("missing source IP6"); 5322 if (add_srcip6(cmd, *av, cblen, tstate)) { 5323 av++; 5324 } 5325 break; 5326 5327 case TOK_DSTIP6: 5328 NEED1("missing destination IP6"); 5329 if (add_dstip6(cmd, *av, cblen, tstate)) { 5330 av++; 5331 } 5332 break; 5333 5334 5335 case TOK_SRCMAC: 5336 NEED1("missing source MAC"); 5337 if (add_srcmac(cmd, *av, tstate)) { 5338 av++; 5339 } 5340 break; 5341 5342 case TOK_DSTMAC: 5343 NEED1("missing destination MAC"); 5344 if (add_dstmac(cmd, *av, tstate)) { 5345 av++; 5346 } 5347 break; 5348 5349 case TOK_SRCPORT: 5350 NEED1("missing source port"); 5351 if (_substrcmp(*av, "any") == 0 || 5352 add_ports(cmd, *av, proto, O_IP_SRCPORT, cblen)) { 5353 av++; 5354 } else 5355 errx(EX_DATAERR, "invalid source port %s", *av); 5356 break; 5357 5358 case TOK_DSTPORT: 5359 NEED1("missing destination port"); 5360 if (_substrcmp(*av, "any") == 0 || 5361 add_ports(cmd, *av, proto, O_IP_DSTPORT, cblen)) { 5362 av++; 5363 } else 5364 errx(EX_DATAERR, "invalid destination port %s", 5365 *av); 5366 break; 5367 5368 case TOK_MAC: 5369 if (add_mac(cmd, av, cblen)) 5370 av += 2; 5371 break; 5372 5373 case TOK_MACTYPE: 5374 NEED1("missing mac type"); 5375 if (!add_mactype(cmd, *av, cblen)) 5376 errx(EX_DATAERR, "invalid mac type %s", *av); 5377 av++; 5378 break; 5379 5380 case TOK_VERREVPATH: 5381 fill_cmd(cmd, O_VERREVPATH, 0, 0); 5382 break; 5383 5384 case TOK_VERSRCREACH: 5385 fill_cmd(cmd, O_VERSRCREACH, 0, 0); 5386 break; 5387 5388 case TOK_ANTISPOOF: 5389 fill_cmd(cmd, O_ANTISPOOF, 0, 0); 5390 break; 5391 5392 case TOK_IPSEC: 5393 fill_cmd(cmd, O_IPSEC, 0, 0); 5394 break; 5395 5396 case TOK_IPV6: 5397 fill_cmd(cmd, O_IP6, 0, 0); 5398 break; 5399 5400 case TOK_IPV4: 5401 fill_cmd(cmd, O_IP4, 0, 0); 5402 break; 5403 5404 case TOK_EXT6HDR: 5405 NEED1("missing extension header"); 5406 fill_ext6hdr( cmd, *av ); 5407 av++; 5408 break; 5409 5410 case TOK_FLOWID: 5411 if (proto != IPPROTO_IPV6 ) 5412 errx( EX_USAGE, "flow-id filter is active " 5413 "only for ipv6 protocol\n"); 5414 fill_flow6( (ipfw_insn_u32 *) cmd, *av, cblen); 5415 av++; 5416 break; 5417 5418 case TOK_COMMENT: 5419 fill_comment(cmd, av, cblen); 5420 av[0]=NULL; 5421 break; 5422 5423 case TOK_TAGGED: 5424 if (av[0] && strpbrk(*av, "-,")) { 5425 if (!add_ports(cmd, *av, 0, O_TAGGED, cblen)) 5426 errx(EX_DATAERR, "tagged: invalid tag" 5427 " list: %s", *av); 5428 } 5429 else { 5430 uint16_t tag; 5431 5432 GET_UINT_ARG(tag, IPFW_ARG_MIN, IPFW_ARG_MAX, 5433 TOK_TAGGED, rule_options); 5434 fill_cmd(cmd, O_TAGGED, 0, tag); 5435 } 5436 av++; 5437 break; 5438 5439 case TOK_FIB: 5440 NEED1("fib requires fib number"); 5441 fill_cmd(cmd, O_FIB, 0, strtoul(*av, NULL, 0)); 5442 av++; 5443 break; 5444 case TOK_SOCKARG: 5445 fill_cmd(cmd, O_SOCKARG, 0, 0); 5446 break; 5447 5448 case TOK_LOOKUP: { 5449 /* optional mask for some LOOKUP types */ 5450 ipfw_insn_table *c = insntod(cmd, table); 5451 char *lkey; 5452 5453 if (!av[0] || !av[1]) 5454 errx(EX_USAGE, 5455 "format: lookup argument tablenum"); 5456 cmd->opcode = O_IP_DST_LOOKUP; 5457 5458 lkey = strsep(av, ":"); 5459 i = match_token(lookup_keys, lkey); 5460 if (i == -1) 5461 errx(EX_USAGE, 5462 "format: cannot lookup on %s", lkey); 5463 /* masked lookup key */ 5464 if (*av != NULL) { 5465 switch (i) { 5466 case LOOKUP_DST_PORT: 5467 case LOOKUP_SRC_PORT: 5468 case LOOKUP_UID: 5469 case LOOKUP_JAIL: 5470 case LOOKUP_DSCP: 5471 case LOOKUP_MARK: 5472 case LOOKUP_RULENUM: 5473 break; 5474 default: 5475 errx(EX_USAGE, 5476 "masked lookup is not supported " 5477 "for %s", lkey); 5478 } 5479 cmd->len |= F_INSN_SIZE(ipfw_insn_table); 5480 c->value = strtoul(*av, NULL, 0); 5481 if (c->value == 0) 5482 errx(EX_USAGE, 5483 "all-zeroes bitmask for lookup " 5484 "is meaningless"); 5485 } else { 5486 cmd->len |= F_INSN_SIZE(ipfw_insn_kidx); 5487 } 5488 CHECK_CMDLEN; 5489 5490 IPFW_SET_LOOKUP_TYPE(cmd, i); 5491 av++; 5492 c->kidx = pack_table(tstate, *av); 5493 if (c->kidx == 0) 5494 errx(EX_DATAERR, 5495 "Invalid table name: %s", *av); 5496 av++; 5497 } 5498 break; 5499 case TOK_FLOW: 5500 NEED1("missing table name"); 5501 if (strncmp(*av, "table(", 6) != 0) 5502 errx(EX_DATAERR, 5503 "enclose table name into \"table()\""); 5504 fill_table(cmd, *av, O_IP_FLOW_LOOKUP, tstate); 5505 av++; 5506 break; 5507 5508 case TOK_SKIPACTION: 5509 if (have_skipcmd) 5510 errx(EX_USAGE, "only one defer-action " 5511 "is allowed"); 5512 have_skipcmd = cmd; 5513 fill_cmd(cmd, O_SKIP_ACTION, 0, 0); 5514 break; 5515 5516 case TOK_MARK: 5517 NEED1("missing mark value:mask"); 5518 fill_mark(cmd, *av, cblen); 5519 av++; 5520 break; 5521 5522 default: 5523 errx(EX_USAGE, "unrecognised option [%d] %s\n", i, s); 5524 } 5525 if (F_LEN(cmd) > 0) { /* prepare to advance */ 5526 prev = cmd; 5527 cmd = next_cmd(cmd, &cblen); 5528 } 5529 } 5530 5531 done: 5532 5533 if (!have_state && have_skipcmd) 5534 warnx("Rule contains \"defer-immediate-action\" " 5535 "and doesn't contain any state-related options."); 5536 5537 /* 5538 * Now copy stuff into the rule. 5539 * If we have a keep-state option, the first instruction 5540 * must be a PROBE_STATE (which is generated here). 5541 * If we have a LOG option, it was stored as the first command, 5542 * and now must be moved to the top of the action part. 5543 */ 5544 dst = (ipfw_insn *)rule->cmd; 5545 5546 /* 5547 * First thing to write into the command stream is the match probability. 5548 */ 5549 if (match_prob != 1) { /* 1 means always match */ 5550 dst->opcode = O_PROB; 5551 dst->len = 2; 5552 *((int32_t *)(dst+1)) = (int32_t)(match_prob * 0x7fffffff); 5553 dst += dst->len; 5554 } 5555 5556 /* 5557 * generate O_PROBE_STATE if necessary 5558 */ 5559 if (have_state && have_state->opcode != O_CHECK_STATE && !have_rstate) { 5560 dst->opcode = O_PROBE_STATE; 5561 dst->len = F_INSN_SIZE(ipfw_insn_kidx); 5562 insntod(dst, kidx)->kidx = insntod(have_state, kidx)->kidx; 5563 dst = next_cmd(dst, &rblen); 5564 } 5565 5566 /* 5567 * copy all commands but O_LOG, O_KEEP_STATE, O_LIMIT, O_ALTQ, O_TAG, 5568 * O_SKIP_ACTION 5569 */ 5570 for (src = (ipfw_insn *)cmdbuf; src != cmd; src += i) { 5571 i = F_LEN(src); 5572 CHECK_RBUFLEN(i); 5573 5574 switch (src->opcode) { 5575 case O_LOG: 5576 case O_KEEP_STATE: 5577 case O_LIMIT: 5578 case O_ALTQ: 5579 case O_TAG: 5580 case O_SKIP_ACTION: 5581 break; 5582 default: 5583 bcopy(src, dst, i * sizeof(uint32_t)); 5584 dst += i; 5585 } 5586 } 5587 5588 /* 5589 * put back the have_state command as last opcode 5590 */ 5591 if (have_state && have_state->opcode != O_CHECK_STATE) { 5592 i = F_LEN(have_state); 5593 CHECK_RBUFLEN(i); 5594 bcopy(have_state, dst, i * sizeof(uint32_t)); 5595 dst += i; 5596 } 5597 5598 /* 5599 * put back the have_skipcmd command as very last opcode 5600 */ 5601 if (have_skipcmd) { 5602 i = F_LEN(have_skipcmd); 5603 CHECK_RBUFLEN(i); 5604 bcopy(have_skipcmd, dst, i * sizeof(uint32_t)); 5605 dst += i; 5606 } 5607 5608 /* 5609 * start action section 5610 */ 5611 rule->act_ofs = dst - rule->cmd; 5612 5613 /* put back O_LOG, O_ALTQ, O_TAG if necessary */ 5614 if (have_log) { 5615 i = F_LEN(have_log); 5616 CHECK_RBUFLEN(i); 5617 bcopy(have_log, dst, i * sizeof(uint32_t)); 5618 dst += i; 5619 } 5620 if (have_altq) { 5621 i = F_LEN(have_altq); 5622 CHECK_RBUFLEN(i); 5623 bcopy(have_altq, dst, i * sizeof(uint32_t)); 5624 dst += i; 5625 } 5626 if (have_tag) { 5627 i = F_LEN(have_tag); 5628 CHECK_RBUFLEN(i); 5629 bcopy(have_tag, dst, i * sizeof(uint32_t)); 5630 dst += i; 5631 } 5632 5633 /* 5634 * copy all other actions 5635 */ 5636 for (src = (ipfw_insn *)actbuf; src != action; src += i) { 5637 i = F_LEN(src); 5638 CHECK_RBUFLEN(i); 5639 bcopy(src, dst, i * sizeof(uint32_t)); 5640 dst += i; 5641 } 5642 5643 rule->cmd_len = (uint32_t *)dst - (uint32_t *)(rule->cmd); 5644 *rbufsize = (char *)dst - (char *)rule; 5645 } 5646 5647 static int 5648 compare_ntlv(const void *_a, const void *_b) 5649 { 5650 const ipfw_obj_ntlv *a, *b; 5651 5652 a = (const ipfw_obj_ntlv *)_a; 5653 b = (const ipfw_obj_ntlv *)_b; 5654 5655 if (a->set < b->set) 5656 return (-1); 5657 else if (a->set > b->set) 5658 return (1); 5659 5660 if (a->idx < b->idx) 5661 return (-1); 5662 else if (a->idx > b->idx) 5663 return (1); 5664 5665 if (a->head.type < b->head.type) 5666 return (-1); 5667 else if (a->head.type > b->head.type) 5668 return (1); 5669 5670 return (0); 5671 } 5672 5673 /* 5674 * Provide kernel with sorted list of referenced objects 5675 */ 5676 static void 5677 object_sort_ctlv(ipfw_obj_ctlv *ctlv) 5678 { 5679 5680 qsort(ctlv + 1, ctlv->count, ctlv->objsize, compare_ntlv); 5681 } 5682 5683 struct object_kt { 5684 uint32_t uidx; 5685 uint16_t type; 5686 }; 5687 static int 5688 compare_object_kntlv(const void *k, const void *v) 5689 { 5690 const ipfw_obj_ntlv *ntlv; 5691 struct object_kt key; 5692 5693 key = *((const struct object_kt *)k); 5694 ntlv = (const ipfw_obj_ntlv *)v; 5695 5696 if (key.uidx < ntlv->idx) 5697 return (-1); 5698 else if (key.uidx > ntlv->idx) 5699 return (1); 5700 5701 if (key.type < ntlv->head.type) 5702 return (-1); 5703 else if (key.type > ntlv->head.type) 5704 return (1); 5705 5706 return (0); 5707 } 5708 5709 /* 5710 * Finds object name in @ctlv by @idx and @type. 5711 * Uses the following facts: 5712 * 1) All TLVs are the same size 5713 * 2) Kernel implementation provides already sorted list. 5714 * 5715 * Returns table name or NULL. 5716 */ 5717 static char * 5718 object_search_ctlv(ipfw_obj_ctlv *ctlv, uint32_t idx, uint16_t type) 5719 { 5720 ipfw_obj_ntlv *ntlv; 5721 struct object_kt key; 5722 5723 key.uidx = idx; 5724 key.type = type; 5725 5726 ntlv = bsearch(&key, (ctlv + 1), ctlv->count, ctlv->objsize, 5727 compare_object_kntlv); 5728 5729 if (ntlv != NULL) 5730 return (ntlv->name); 5731 5732 return (NULL); 5733 } 5734 5735 static char * 5736 table_search_ctlv(ipfw_obj_ctlv *ctlv, uint32_t idx) 5737 { 5738 5739 return (object_search_ctlv(ctlv, idx, IPFW_TLV_TBL_NAME)); 5740 } 5741 5742 /* 5743 * Adds one or more rules to ipfw chain. 5744 * Data layout: 5745 * Request: 5746 * [ 5747 * ip_fw3_opheader 5748 * [ ipfw_obj_ctlv(IPFW_TLV_TBL_LIST) ipfw_obj_ntlv x N ] (optional *1) 5749 * [ ipfw_obj_ctlv(IPFW_TLV_RULE_LIST) [ ip_fw_rule ip_fw_insn ] x N ] (*2) (*3) 5750 * ] 5751 * Reply: 5752 * [ 5753 * ip_fw3_opheader 5754 * [ ipfw_obj_ctlv(IPFW_TLV_TBL_LIST) ipfw_obj_ntlv x N ] (optional) 5755 * [ ipfw_obj_ctlv(IPFW_TLV_RULE_LIST) [ ip_fw_rule ip_fw_insn ] x N ] 5756 * ] 5757 * 5758 * Rules in reply are modified to store their actual ruleset number. 5759 * 5760 * (*1) TLVs inside IPFW_TLV_TBL_LIST needs to be sorted ascending 5761 * according to their idx field and there has to be no duplicates. 5762 * (*2) Numbered rules inside IPFW_TLV_RULE_LIST needs to be sorted ascending. 5763 * (*3) Each ip_fw structure needs to be aligned to u64 boundary. 5764 */ 5765 void 5766 ipfw_add(char *av[]) 5767 { 5768 uint32_t rulebuf[1024]; 5769 int rbufsize, default_off, tlen, rlen; 5770 size_t sz; 5771 struct tidx ts; 5772 struct ip_fw_rule *rule; 5773 caddr_t tbuf; 5774 ip_fw3_opheader *op3; 5775 ipfw_obj_ctlv *ctlv, *tstate; 5776 5777 rbufsize = sizeof(rulebuf); 5778 memset(rulebuf, 0, rbufsize); 5779 memset(&ts, 0, sizeof(ts)); 5780 5781 /* Optimize case with no tables */ 5782 default_off = sizeof(ipfw_obj_ctlv) + sizeof(ip_fw3_opheader); 5783 op3 = (ip_fw3_opheader *)rulebuf; 5784 ctlv = (ipfw_obj_ctlv *)(op3 + 1); 5785 rule = (struct ip_fw_rule *)(ctlv + 1); 5786 rbufsize -= default_off; 5787 5788 compile_rule(av, (uint32_t *)rule, &rbufsize, &ts); 5789 /* Align rule size to u64 boundary */ 5790 rlen = roundup2(rbufsize, sizeof(uint64_t)); 5791 5792 tbuf = NULL; 5793 sz = 0; 5794 tstate = NULL; 5795 if (ts.count != 0) { 5796 /* Some tables. We have to alloc more data */ 5797 tlen = ts.count * sizeof(ipfw_obj_ntlv); 5798 sz = default_off + sizeof(ipfw_obj_ctlv) + tlen + rlen; 5799 5800 if ((tbuf = calloc(1, sz)) == NULL) 5801 err(EX_UNAVAILABLE, "malloc() failed for IP_FW_XADD"); 5802 op3 = (ip_fw3_opheader *)tbuf; 5803 /* Tables first */ 5804 ctlv = (ipfw_obj_ctlv *)(op3 + 1); 5805 ctlv->head.type = IPFW_TLV_TBLNAME_LIST; 5806 ctlv->head.length = sizeof(ipfw_obj_ctlv) + tlen; 5807 ctlv->count = ts.count; 5808 ctlv->objsize = sizeof(ipfw_obj_ntlv); 5809 memcpy(ctlv + 1, ts.idx, tlen); 5810 object_sort_ctlv(ctlv); 5811 tstate = ctlv; 5812 /* Rule next */ 5813 ctlv = (ipfw_obj_ctlv *)((caddr_t)ctlv + ctlv->head.length); 5814 ctlv->head.type = IPFW_TLV_RULE_LIST; 5815 ctlv->head.length = sizeof(ipfw_obj_ctlv) + rlen; 5816 ctlv->count = 1; 5817 memcpy(ctlv + 1, rule, rbufsize); 5818 } else { 5819 /* Simply add header */ 5820 sz = rlen + default_off; 5821 memset(ctlv, 0, sizeof(*ctlv)); 5822 ctlv->head.type = IPFW_TLV_RULE_LIST; 5823 ctlv->head.length = sizeof(ipfw_obj_ctlv) + rlen; 5824 ctlv->count = 1; 5825 } 5826 5827 if (do_get3(IP_FW_XADD, op3, &sz) != 0) 5828 err(EX_UNAVAILABLE, "getsockopt(%s)", "IP_FW_XADD"); 5829 5830 if (!g_co.do_quiet) { 5831 struct format_opts sfo; 5832 struct buf_pr bp; 5833 memset(&sfo, 0, sizeof(sfo)); 5834 sfo.tstate = tstate; 5835 sfo.set_mask = (uint32_t)(-1); 5836 bp_alloc(&bp, 4096); 5837 show_static_rule(&g_co, &sfo, &bp, rule, NULL); 5838 printf("%s", bp.buf); 5839 bp_free(&bp); 5840 } 5841 5842 if (tbuf != NULL) 5843 free(tbuf); 5844 5845 if (ts.idx != NULL) 5846 free(ts.idx); 5847 } 5848 5849 /* 5850 * clear the counters or the log counters. 5851 * optname has the following values: 5852 * 0 (zero both counters and logging) 5853 * 1 (zero logging only) 5854 */ 5855 void 5856 ipfw_zero(int ac, char *av[], int optname) 5857 { 5858 ipfw_range_tlv rt; 5859 char const *errstr; 5860 char const *name = optname ? "RESETLOG" : "ZERO"; 5861 uint32_t arg; 5862 int failed = EX_OK; 5863 5864 optname = optname ? IP_FW_XRESETLOG : IP_FW_XZERO; 5865 av++; ac--; 5866 5867 if (ac == 0) { 5868 /* clear all entries */ 5869 memset(&rt, 0, sizeof(rt)); 5870 rt.flags = IPFW_RCFLAG_ALL; 5871 if (do_range_cmd(optname, &rt) < 0) 5872 err(EX_UNAVAILABLE, "setsockopt(IP_FW_X%s)", name); 5873 if (!g_co.do_quiet) 5874 printf("%s.\n", optname == IP_FW_XZERO ? 5875 "Accounting cleared":"Logging counts reset"); 5876 5877 return; 5878 } 5879 5880 while (ac) { 5881 /* Rule number */ 5882 if (isdigit(**av)) { 5883 arg = strtonum(*av, 0, 0xffff, &errstr); 5884 if (errstr) 5885 errx(EX_DATAERR, 5886 "invalid rule number %s\n", *av); 5887 memset(&rt, 0, sizeof(rt)); 5888 rt.start_rule = arg; 5889 rt.end_rule = arg; 5890 rt.flags |= IPFW_RCFLAG_RANGE; 5891 if (g_co.use_set != 0) { 5892 rt.set = g_co.use_set - 1; 5893 rt.flags |= IPFW_RCFLAG_SET; 5894 } 5895 if (do_range_cmd(optname, &rt) != 0) { 5896 warn("rule %u: setsockopt(IP_FW_X%s)", 5897 arg, name); 5898 failed = EX_UNAVAILABLE; 5899 } else if (rt.new_set == 0) { 5900 printf("Entry %d not found\n", arg); 5901 failed = EX_UNAVAILABLE; 5902 } else if (!g_co.do_quiet) 5903 printf("Entry %d %s.\n", arg, 5904 optname == IP_FW_XZERO ? 5905 "cleared" : "logging count reset"); 5906 } else { 5907 errx(EX_USAGE, "invalid rule number ``%s''", *av); 5908 } 5909 av++; ac--; 5910 } 5911 if (failed != EX_OK) 5912 exit(failed); 5913 } 5914 5915 void 5916 ipfw_flush(int force) 5917 { 5918 ipfw_range_tlv rt; 5919 5920 if (!force && !g_co.do_quiet) { /* need to ask user */ 5921 int c; 5922 5923 printf("Are you sure? [yn] "); 5924 fflush(stdout); 5925 do { 5926 c = toupper(getc(stdin)); 5927 while (c != '\n' && getc(stdin) != '\n') 5928 if (feof(stdin)) 5929 return; /* and do not flush */ 5930 } while (c != 'Y' && c != 'N'); 5931 printf("\n"); 5932 if (c == 'N') /* user said no */ 5933 return; 5934 } 5935 if (g_co.do_pipe) { 5936 dummynet_flush(); 5937 return; 5938 } 5939 /* `ipfw set N flush` - is the same that `ipfw delete set N` */ 5940 memset(&rt, 0, sizeof(rt)); 5941 if (g_co.use_set != 0) { 5942 rt.set = g_co.use_set - 1; 5943 rt.flags = IPFW_RCFLAG_SET; 5944 } else 5945 rt.flags = IPFW_RCFLAG_ALL; 5946 if (do_range_cmd(IP_FW_XDEL, &rt) != 0) 5947 err(EX_UNAVAILABLE, "setsockopt(IP_FW_XDEL)"); 5948 if (!g_co.do_quiet) 5949 printf("Flushed all %s.\n", g_co.do_pipe ? "pipes" : "rules"); 5950 } 5951 5952 static struct _s_x intcmds[] = { 5953 { "talist", TOK_TALIST }, 5954 { "iflist", TOK_IFLIST }, 5955 { "olist", TOK_OLIST }, 5956 { "vlist", TOK_VLIST }, 5957 { "monitor", TOK_MONITOR }, 5958 { NULL, 0 } 5959 }; 5960 5961 static struct _s_x otypes[] = { 5962 { "EACTION", IPFW_TLV_EACTION }, 5963 { "DYNSTATE", IPFW_TLV_STATE_NAME }, 5964 { NULL, 0 } 5965 }; 5966 5967 static const char* 5968 lookup_eaction_name(ipfw_obj_ntlv *ntlv, int cnt, uint16_t type) 5969 { 5970 const char *name; 5971 int i; 5972 5973 name = NULL; 5974 for (i = 0; i < cnt; i++) { 5975 if (ntlv[i].head.type != IPFW_TLV_EACTION) 5976 continue; 5977 if (IPFW_TLV_EACTION_NAME(ntlv[i].idx) != type) 5978 continue; 5979 name = ntlv[i].name; 5980 break; 5981 } 5982 return (name); 5983 } 5984 5985 static void 5986 ipfw_list_objects(int ac __unused, char *av[] __unused) 5987 { 5988 ipfw_obj_lheader req, *olh; 5989 ipfw_obj_ntlv *ntlv; 5990 const char *name; 5991 size_t sz; 5992 uint32_t i; 5993 5994 memset(&req, 0, sizeof(req)); 5995 sz = sizeof(req); 5996 if (do_get3(IP_FW_DUMP_SRVOBJECTS, &req.opheader, &sz) != 0) 5997 if (errno != ENOMEM) 5998 return; 5999 6000 sz = req.size; 6001 if ((olh = calloc(1, sz)) == NULL) 6002 return; 6003 6004 olh->size = sz; 6005 if (do_get3(IP_FW_DUMP_SRVOBJECTS, &olh->opheader, &sz) != 0) { 6006 free(olh); 6007 return; 6008 } 6009 6010 if (olh->count > 0) 6011 printf("Objects list:\n"); 6012 else 6013 printf("There are no objects\n"); 6014 ntlv = (ipfw_obj_ntlv *)(olh + 1); 6015 for (i = 0; i < olh->count; i++) { 6016 name = match_value(otypes, ntlv->head.type); 6017 if (name == NULL) 6018 name = lookup_eaction_name( 6019 (ipfw_obj_ntlv *)(olh + 1), olh->count, 6020 ntlv->head.type); 6021 if (name == NULL) 6022 printf(" kidx: %4d\ttype: %10d\tname: %s\n", 6023 ntlv->idx, ntlv->head.type, ntlv->name); 6024 else 6025 printf(" kidx: %4d\ttype: %10s\tname: %s\n", 6026 ntlv->idx, name, ntlv->name); 6027 ntlv++; 6028 } 6029 free(olh); 6030 } 6031 6032 static void 6033 bprint_sa(struct buf_pr *bp, const struct sockaddr *sa) 6034 { 6035 struct sockaddr_storage ss; 6036 char buf[INET6_ADDRSTRLEN]; 6037 6038 memset(&ss, 0, sizeof(ss)); 6039 if (sa->sa_len == 0) 6040 ss.ss_family = sa->sa_family; 6041 else 6042 memcpy(&ss, sa, sa->sa_len); 6043 6044 /* set ss_len in case it was shortened */ 6045 switch (sa->sa_family) { 6046 case AF_INET: 6047 ss.ss_len = sizeof(struct sockaddr_in); 6048 break; 6049 default: 6050 ss.ss_len = sizeof(struct sockaddr_in6); 6051 } 6052 if (getnameinfo((const struct sockaddr *)&ss, ss.ss_len, 6053 buf, sizeof(buf), NULL, 0, NI_NUMERICHOST) != 0) { 6054 bprintf(bp, "bad-addr"); 6055 return; 6056 } 6057 bprintf(bp, "%s", buf); 6058 } 6059 6060 static void 6061 ipfw_rtsock_monitor(const char *filter) 6062 { 6063 char msg[2048], buf[32]; 6064 struct timespec tp; 6065 struct tm tm; 6066 struct buf_pr bp; 6067 struct rt_msghdr *hdr; 6068 struct sockaddr *sa; 6069 struct sockaddr_dl *sdl; 6070 ipfwlog_rtsock_hdr_v2 *loghdr; 6071 ssize_t nread; 6072 size_t msglen; 6073 int rtsock; 6074 6075 rtsock = socket(PF_ROUTE, SOCK_RAW, AF_IPFWLOG); 6076 if (rtsock < 0) 6077 err(EX_UNAVAILABLE, "socket(AF_IPFWLOG)"); 6078 bp_alloc(&bp, 4096); 6079 for (;;) { 6080 nread = read(rtsock, msg, sizeof(msg)); 6081 if (nread < 0) { 6082 warn("read()"); 6083 continue; 6084 } 6085 msglen = nread; 6086 if (msglen < sizeof(*hdr)) 6087 continue; 6088 6089 hdr = (struct rt_msghdr *)msg; 6090 if (hdr->rtm_version != RTM_VERSION || 6091 hdr->rtm_type != RTM_IPFWLOG || 6092 (hdr->rtm_addrs & (1 << RTAX_DST)) == 0 || 6093 (hdr->rtm_addrs & (1 << RTAX_GATEWAY)) == 0 || 6094 (hdr->rtm_addrs & (1 << RTAX_NETMASK)) == 0) 6095 continue; 6096 6097 msglen -= sizeof(*hdr); 6098 sdl = (struct sockaddr_dl *)(hdr + 1); 6099 if (msglen < sizeof(*sdl) || msglen < SA_SIZE(sdl) || 6100 sdl->sdl_family != AF_IPFWLOG || 6101 sdl->sdl_type != 2 /* version */ || 6102 sdl->sdl_alen != sizeof(*loghdr)) 6103 continue; 6104 6105 msglen -= SA_SIZE(sdl); 6106 loghdr = (ipfwlog_rtsock_hdr_v2 *)sdl->sdl_data; 6107 /* filter by rule comment. MAX_COMMENT_LEN = 80 */ 6108 if (filter != NULL && 6109 strncmp(filter, loghdr->comment, 80) != 0) 6110 continue; 6111 6112 sa = (struct sockaddr *)((char *)sdl + SA_SIZE(sdl)); 6113 if (msglen < SA_SIZE(sa)) 6114 continue; 6115 6116 msglen -= SA_SIZE(sa); 6117 bp_flush(&bp); 6118 6119 clock_gettime(CLOCK_REALTIME, &tp); 6120 localtime_r(&tp.tv_sec, &tm); 6121 strftime(buf, sizeof(buf), "%T", &tm); 6122 bprintf(&bp, "%s.%03ld AF %s", buf, tp.tv_nsec / 1000000, 6123 sa->sa_family == AF_INET ? "IPv4" : "IPv6"); 6124 6125 bprintf(&bp, " %s >", 6126 ether_ntoa((const struct ether_addr *)loghdr->ether_shost)); 6127 bprintf(&bp, " %s, ", 6128 ether_ntoa((const struct ether_addr *)loghdr->ether_dhost)); 6129 bprint_sa(&bp, sa); 6130 6131 sa = (struct sockaddr *)((char *)sa + SA_SIZE(sa)); 6132 if (msglen < SA_SIZE(sa)) 6133 continue; 6134 6135 msglen -= SA_SIZE(sa); 6136 bprintf(&bp, " > "); 6137 bprint_sa(&bp, sa); 6138 bprintf(&bp, ", set %u, rulenum %u, targ 0x%08x, " 6139 "%scmd[op %d, len %d, arg1 0x%04x], mark 0x%08x", 6140 sdl->sdl_index, loghdr->rulenum, loghdr->tablearg, 6141 (loghdr->cmd.len & F_NOT) ? "!": "", 6142 loghdr->cmd.opcode, F_LEN(&loghdr->cmd), 6143 loghdr->cmd.arg1, loghdr->mark); 6144 6145 sa = (struct sockaddr *)((char *)sa + SA_SIZE(sa)); 6146 if ((hdr->rtm_addrs & (1 << RTAX_GENMASK)) != 0 && 6147 msglen >= SA_SIZE(sa)) { 6148 msglen -= SA_SIZE(sa); 6149 bprintf(&bp, ", nh "); 6150 bprint_sa(&bp, sa); 6151 } 6152 if (sdl->sdl_nlen > 0) 6153 bprintf(&bp, " // %s", loghdr->comment); 6154 printf("%s\n", bp.buf); 6155 } 6156 bp_free(&bp); 6157 close(rtsock); 6158 } 6159 6160 void 6161 ipfw_internal_handler(int ac, char *av[]) 6162 { 6163 int tcmd; 6164 6165 ac--; av++; 6166 NEED1("internal cmd required"); 6167 6168 if ((tcmd = match_token(intcmds, *av)) == -1) 6169 errx(EX_USAGE, "invalid internal sub-cmd: %s", *av); 6170 6171 switch (tcmd) { 6172 case TOK_IFLIST: 6173 ipfw_list_tifaces(); 6174 break; 6175 case TOK_TALIST: 6176 ipfw_list_ta(ac, av); 6177 break; 6178 case TOK_OLIST: 6179 ipfw_list_objects(ac, av); 6180 break; 6181 case TOK_VLIST: 6182 ipfw_list_values(ac, av); 6183 break; 6184 case TOK_MONITOR: 6185 av++; 6186 ipfw_rtsock_monitor(*av); 6187 break; 6188 } 6189 } 6190 6191 static int 6192 ipfw_get_tracked_ifaces(ipfw_obj_lheader **polh) 6193 { 6194 ipfw_obj_lheader req, *olh; 6195 size_t sz; 6196 6197 memset(&req, 0, sizeof(req)); 6198 sz = sizeof(req); 6199 6200 if (do_get3(IP_FW_XIFLIST, &req.opheader, &sz) != 0) { 6201 if (errno != ENOMEM) 6202 return (errno); 6203 } 6204 6205 sz = req.size; 6206 if ((olh = calloc(1, sz)) == NULL) 6207 return (ENOMEM); 6208 6209 olh->size = sz; 6210 if (do_get3(IP_FW_XIFLIST, &olh->opheader, &sz) != 0) { 6211 free(olh); 6212 return (errno); 6213 } 6214 6215 *polh = olh; 6216 return (0); 6217 } 6218 6219 static int 6220 ifinfo_cmp(const void *a, const void *b) 6221 { 6222 const ipfw_iface_info *ia, *ib; 6223 6224 ia = (const ipfw_iface_info *)a; 6225 ib = (const ipfw_iface_info *)b; 6226 6227 return (stringnum_cmp(ia->ifname, ib->ifname)); 6228 } 6229 6230 /* 6231 * Retrieves table list from kernel, 6232 * optionally sorts it and calls requested function for each table. 6233 * Returns 0 on success. 6234 */ 6235 static void 6236 ipfw_list_tifaces(void) 6237 { 6238 ipfw_obj_lheader *olh = NULL; 6239 ipfw_iface_info *info; 6240 uint32_t i; 6241 int error; 6242 6243 if ((error = ipfw_get_tracked_ifaces(&olh)) != 0) 6244 err(EX_OSERR, "Unable to request ipfw tracked interface list"); 6245 6246 qsort(olh + 1, olh->count, olh->objsize, ifinfo_cmp); 6247 6248 info = (ipfw_iface_info *)(olh + 1); 6249 for (i = 0; i < olh->count; i++) { 6250 if (info->flags & IPFW_IFFLAG_RESOLVED) 6251 printf("%s ifindex: %d refcount: %u changes: %u\n", 6252 info->ifname, info->ifindex, info->refcnt, 6253 info->gencnt); 6254 else 6255 printf("%s ifindex: unresolved refcount: %u changes: %u\n", 6256 info->ifname, info->refcnt, info->gencnt); 6257 info = (ipfw_iface_info *)((caddr_t)info + olh->objsize); 6258 } 6259 6260 free(olh); 6261 } 6262