ipfw2.c revision 369763
1/* 2 * Copyright (c) 2002-2003 Luigi Rizzo 3 * Copyright (c) 1996 Alex Nash, Paul Traina, Poul-Henning Kamp 4 * Copyright (c) 1994 Ugen J.S.Antsilevich 5 * 6 * Idea and grammar partially left from: 7 * Copyright (c) 1993 Daniel Boulet 8 * 9 * Redistribution and use in source forms, with and without modification, 10 * are permitted provided that this entire comment appears intact. 11 * 12 * Redistribution in binary form may occur without any restrictions. 13 * Obviously, it would be nice if you gave credit where credit is due 14 * but requiring it would be too onerous. 15 * 16 * This software is provided ``AS IS'' without any warranties of any kind. 17 * 18 * NEW command line interface for IP firewall facility 19 * 20 * $FreeBSD: stable/11/sbin/ipfw/ipfw2.c 369763 2021-05-09 12:59:27Z donner $ 21 */ 22 23#include <sys/types.h> 24#include <sys/param.h> 25#include <sys/socket.h> 26#include <sys/sockio.h> 27#include <sys/sysctl.h> 28 29#include "ipfw2.h" 30 31#include <ctype.h> 32#include <err.h> 33#include <errno.h> 34#include <grp.h> 35#include <jail.h> 36#include <netdb.h> 37#include <pwd.h> 38#include <stdio.h> 39#include <stdarg.h> 40#include <stdint.h> 41#include <stdlib.h> 42#include <string.h> 43#include <sysexits.h> 44#include <time.h> /* ctime */ 45#include <timeconv.h> /* _long_to_time */ 46#include <unistd.h> 47#include <fcntl.h> 48#include <stddef.h> /* offsetof */ 49 50#include <net/ethernet.h> 51#include <net/if.h> /* only IFNAMSIZ */ 52#include <netinet/in.h> 53#include <netinet/in_systm.h> /* only n_short, n_long */ 54#include <netinet/ip.h> 55#include <netinet/ip_icmp.h> 56#include <netinet/ip_fw.h> 57#include <netinet/tcp.h> 58#include <arpa/inet.h> 59 60struct cmdline_opts co; /* global options */ 61 62struct 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 75int resvd_set_number = RESVD_SET; 76 77int 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 124static 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 135static 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 */ 151static 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 160static 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 171struct _s_x f_ipdscp[] = { 172 { "af11", IPTOS_DSCP_AF11 >> 2 }, /* 001010 */ 173 { "af12", IPTOS_DSCP_AF12 >> 2 }, /* 001100 */ 174 { "af13", IPTOS_DSCP_AF13 >> 2 }, /* 001110 */ 175 { "af21", IPTOS_DSCP_AF21 >> 2 }, /* 010010 */ 176 { "af22", IPTOS_DSCP_AF22 >> 2 }, /* 010100 */ 177 { "af23", IPTOS_DSCP_AF23 >> 2 }, /* 010110 */ 178 { "af31", IPTOS_DSCP_AF31 >> 2 }, /* 011010 */ 179 { "af32", IPTOS_DSCP_AF32 >> 2 }, /* 011100 */ 180 { "af33", IPTOS_DSCP_AF33 >> 2 }, /* 011110 */ 181 { "af41", IPTOS_DSCP_AF41 >> 2 }, /* 100010 */ 182 { "af42", IPTOS_DSCP_AF42 >> 2 }, /* 100100 */ 183 { "af43", IPTOS_DSCP_AF43 >> 2 }, /* 100110 */ 184 { "be", IPTOS_DSCP_CS0 >> 2 }, /* 000000 */ 185 { "ef", IPTOS_DSCP_EF >> 2 }, /* 101110 */ 186 { "cs0", IPTOS_DSCP_CS0 >> 2 }, /* 000000 */ 187 { "cs1", IPTOS_DSCP_CS1 >> 2 }, /* 001000 */ 188 { "cs2", IPTOS_DSCP_CS2 >> 2 }, /* 010000 */ 189 { "cs3", IPTOS_DSCP_CS3 >> 2 }, /* 011000 */ 190 { "cs4", IPTOS_DSCP_CS4 >> 2 }, /* 100000 */ 191 { "cs5", IPTOS_DSCP_CS5 >> 2 }, /* 101000 */ 192 { "cs6", IPTOS_DSCP_CS6 >> 2 }, /* 110000 */ 193 { "cs7", IPTOS_DSCP_CS7 >> 2 }, /* 100000 */ 194 { NULL, 0 } 195}; 196 197static struct _s_x limit_masks[] = { 198 {"all", DYN_SRC_ADDR|DYN_SRC_PORT|DYN_DST_ADDR|DYN_DST_PORT}, 199 {"src-addr", DYN_SRC_ADDR}, 200 {"src-port", DYN_SRC_PORT}, 201 {"dst-addr", DYN_DST_ADDR}, 202 {"dst-port", DYN_DST_PORT}, 203 {NULL, 0} 204}; 205 206/* 207 * we use IPPROTO_ETHERTYPE as a fake protocol id to call the print routines 208 * This is only used in this code. 209 */ 210#define IPPROTO_ETHERTYPE 0x1000 211static struct _s_x ether_types[] = { 212 /* 213 * Note, we cannot use "-:&/" in the names because they are field 214 * separators in the type specifications. Also, we use s = NULL as 215 * end-delimiter, because a type of 0 can be legal. 216 */ 217 { "ip", 0x0800 }, 218 { "ipv4", 0x0800 }, 219 { "ipv6", 0x86dd }, 220 { "arp", 0x0806 }, 221 { "rarp", 0x8035 }, 222 { "vlan", 0x8100 }, 223 { "loop", 0x9000 }, 224 { "trail", 0x1000 }, 225 { "at", 0x809b }, 226 { "atalk", 0x809b }, 227 { "aarp", 0x80f3 }, 228 { "pppoe_disc", 0x8863 }, 229 { "pppoe_sess", 0x8864 }, 230 { "ipx_8022", 0x00E0 }, 231 { "ipx_8023", 0x0000 }, 232 { "ipx_ii", 0x8137 }, 233 { "ipx_snap", 0x8137 }, 234 { "ipx", 0x8137 }, 235 { "ns", 0x0600 }, 236 { NULL, 0 } 237}; 238 239static struct _s_x rule_eactions[] = { 240 { "nat64clat", TOK_NAT64CLAT }, 241 { "nat64lsn", TOK_NAT64LSN }, 242 { "nat64stl", TOK_NAT64STL }, 243 { "nptv6", TOK_NPTV6 }, 244 { "tcp-setmss", TOK_TCPSETMSS }, 245 { NULL, 0 } /* terminator */ 246}; 247 248static struct _s_x rule_actions[] = { 249 { "abort6", TOK_ABORT6 }, 250 { "abort", TOK_ABORT }, 251 { "accept", TOK_ACCEPT }, 252 { "pass", TOK_ACCEPT }, 253 { "allow", TOK_ACCEPT }, 254 { "permit", TOK_ACCEPT }, 255 { "count", TOK_COUNT }, 256 { "pipe", TOK_PIPE }, 257 { "queue", TOK_QUEUE }, 258 { "divert", TOK_DIVERT }, 259 { "tee", TOK_TEE }, 260 { "netgraph", TOK_NETGRAPH }, 261 { "ngtee", TOK_NGTEE }, 262 { "fwd", TOK_FORWARD }, 263 { "forward", TOK_FORWARD }, 264 { "skipto", TOK_SKIPTO }, 265 { "deny", TOK_DENY }, 266 { "drop", TOK_DENY }, 267 { "reject", TOK_REJECT }, 268 { "reset6", TOK_RESET6 }, 269 { "reset", TOK_RESET }, 270 { "unreach6", TOK_UNREACH6 }, 271 { "unreach", TOK_UNREACH }, 272 { "check-state", TOK_CHECKSTATE }, 273 { "//", TOK_COMMENT }, 274 { "nat", TOK_NAT }, 275 { "reass", TOK_REASS }, 276 { "setfib", TOK_SETFIB }, 277 { "setdscp", TOK_SETDSCP }, 278 { "call", TOK_CALL }, 279 { "return", TOK_RETURN }, 280 { "eaction", TOK_EACTION }, 281 { "tcp-setmss", TOK_TCPSETMSS }, 282 { NULL, 0 } /* terminator */ 283}; 284 285static struct _s_x rule_action_params[] = { 286 { "altq", TOK_ALTQ }, 287 { "log", TOK_LOG }, 288 { "tag", TOK_TAG }, 289 { "untag", TOK_UNTAG }, 290 { NULL, 0 } /* terminator */ 291}; 292 293/* 294 * The 'lookup' instruction accepts one of the following arguments. 295 * -1 is a terminator for the list. 296 * Arguments are passed as v[1] in O_DST_LOOKUP options. 297 */ 298static int lookup_key[] = { 299 TOK_DSTIP, TOK_SRCIP, TOK_DSTPORT, TOK_SRCPORT, 300 TOK_UID, TOK_JAIL, TOK_DSCP, -1 }; 301 302static struct _s_x rule_options[] = { 303 { "tagged", TOK_TAGGED }, 304 { "uid", TOK_UID }, 305 { "gid", TOK_GID }, 306 { "jail", TOK_JAIL }, 307 { "in", TOK_IN }, 308 { "limit", TOK_LIMIT }, 309 { "set-limit", TOK_SETLIMIT }, 310 { "keep-state", TOK_KEEPSTATE }, 311 { "record-state", TOK_RECORDSTATE }, 312 { "bridged", TOK_LAYER2 }, 313 { "layer2", TOK_LAYER2 }, 314 { "out", TOK_OUT }, 315 { "diverted", TOK_DIVERTED }, 316 { "diverted-loopback", TOK_DIVERTEDLOOPBACK }, 317 { "diverted-output", TOK_DIVERTEDOUTPUT }, 318 { "xmit", TOK_XMIT }, 319 { "recv", TOK_RECV }, 320 { "via", TOK_VIA }, 321 { "fragment", TOK_FRAG }, 322 { "frag", TOK_FRAG }, 323 { "fib", TOK_FIB }, 324 { "ipoptions", TOK_IPOPTS }, 325 { "ipopts", TOK_IPOPTS }, 326 { "iplen", TOK_IPLEN }, 327 { "ipid", TOK_IPID }, 328 { "ipprecedence", TOK_IPPRECEDENCE }, 329 { "dscp", TOK_DSCP }, 330 { "iptos", TOK_IPTOS }, 331 { "ipttl", TOK_IPTTL }, 332 { "ipversion", TOK_IPVER }, 333 { "ipver", TOK_IPVER }, 334 { "estab", TOK_ESTAB }, 335 { "established", TOK_ESTAB }, 336 { "setup", TOK_SETUP }, 337 { "sockarg", TOK_SOCKARG }, 338 { "tcpdatalen", TOK_TCPDATALEN }, 339 { "tcpflags", TOK_TCPFLAGS }, 340 { "tcpflgs", TOK_TCPFLAGS }, 341 { "tcpmss", TOK_TCPMSS }, 342 { "tcpoptions", TOK_TCPOPTS }, 343 { "tcpopts", TOK_TCPOPTS }, 344 { "tcpseq", TOK_TCPSEQ }, 345 { "tcpack", TOK_TCPACK }, 346 { "tcpwin", TOK_TCPWIN }, 347 { "icmptype", TOK_ICMPTYPES }, 348 { "icmptypes", TOK_ICMPTYPES }, 349 { "dst-ip", TOK_DSTIP }, 350 { "src-ip", TOK_SRCIP }, 351 { "dst-port", TOK_DSTPORT }, 352 { "src-port", TOK_SRCPORT }, 353 { "proto", TOK_PROTO }, 354 { "MAC", TOK_MAC }, 355 { "mac", TOK_MAC }, 356 { "mac-type", TOK_MACTYPE }, 357 { "verrevpath", TOK_VERREVPATH }, 358 { "versrcreach", TOK_VERSRCREACH }, 359 { "antispoof", TOK_ANTISPOOF }, 360 { "ipsec", TOK_IPSEC }, 361 { "icmp6type", TOK_ICMP6TYPES }, 362 { "icmp6types", TOK_ICMP6TYPES }, 363 { "ext6hdr", TOK_EXT6HDR}, 364 { "flow-id", TOK_FLOWID}, 365 { "ipv6", TOK_IPV6}, 366 { "ip6", TOK_IPV6}, 367 { "ipv4", TOK_IPV4}, 368 { "ip4", TOK_IPV4}, 369 { "dst-ipv6", TOK_DSTIP6}, 370 { "dst-ip6", TOK_DSTIP6}, 371 { "src-ipv6", TOK_SRCIP6}, 372 { "src-ip6", TOK_SRCIP6}, 373 { "lookup", TOK_LOOKUP}, 374 { "flow", TOK_FLOW}, 375 { "defer-action", TOK_SKIPACTION }, 376 { "defer-immediate-action", TOK_SKIPACTION }, 377 { "//", TOK_COMMENT }, 378 379 { "not", TOK_NOT }, /* pseudo option */ 380 { "!", /* escape ? */ TOK_NOT }, /* pseudo option */ 381 { "or", TOK_OR }, /* pseudo option */ 382 { "|", /* escape */ TOK_OR }, /* pseudo option */ 383 { "{", TOK_STARTBRACE }, /* pseudo option */ 384 { "(", TOK_STARTBRACE }, /* pseudo option */ 385 { "}", TOK_ENDBRACE }, /* pseudo option */ 386 { ")", TOK_ENDBRACE }, /* pseudo option */ 387 { NULL, 0 } /* terminator */ 388}; 389 390void bprint_uint_arg(struct buf_pr *bp, const char *str, uint32_t arg); 391static int ipfw_get_config(struct cmdline_opts *co, struct format_opts *fo, 392 ipfw_cfg_lheader **pcfg, size_t *psize); 393static int ipfw_show_config(struct cmdline_opts *co, struct format_opts *fo, 394 ipfw_cfg_lheader *cfg, size_t sz, int ac, char **av); 395static void ipfw_list_tifaces(void); 396 397struct tidx; 398static uint16_t pack_object(struct tidx *tstate, char *name, int otype); 399static uint16_t pack_table(struct tidx *tstate, char *name); 400 401static char *table_search_ctlv(ipfw_obj_ctlv *ctlv, uint16_t idx); 402static void object_sort_ctlv(ipfw_obj_ctlv *ctlv); 403static char *object_search_ctlv(ipfw_obj_ctlv *ctlv, uint16_t idx, 404 uint16_t type); 405 406/* 407 * Simple string buffer API. 408 * Used to simplify buffer passing between function and for 409 * transparent overrun handling. 410 */ 411 412/* 413 * Allocates new buffer of given size @sz. 414 * 415 * Returns 0 on success. 416 */ 417int 418bp_alloc(struct buf_pr *b, size_t size) 419{ 420 memset(b, 0, sizeof(struct buf_pr)); 421 422 if ((b->buf = calloc(1, size)) == NULL) 423 return (ENOMEM); 424 425 b->ptr = b->buf; 426 b->size = size; 427 b->avail = b->size; 428 429 return (0); 430} 431 432void 433bp_free(struct buf_pr *b) 434{ 435 436 free(b->buf); 437} 438 439/* 440 * Flushes buffer so new writer start from beginning. 441 */ 442void 443bp_flush(struct buf_pr *b) 444{ 445 446 b->ptr = b->buf; 447 b->avail = b->size; 448 b->buf[0] = '\0'; 449} 450 451/* 452 * Print message specified by @format and args. 453 * Automatically manage buffer space and transparently handle 454 * buffer overruns. 455 * 456 * Returns number of bytes that should have been printed. 457 */ 458int 459bprintf(struct buf_pr *b, char *format, ...) 460{ 461 va_list args; 462 int i; 463 464 va_start(args, format); 465 466 i = vsnprintf(b->ptr, b->avail, format, args); 467 va_end(args); 468 469 if (i > b->avail || i < 0) { 470 /* Overflow or print error */ 471 b->avail = 0; 472 } else { 473 b->ptr += i; 474 b->avail -= i; 475 } 476 477 b->needed += i; 478 479 return (i); 480} 481 482/* 483 * Special values printer for tablearg-aware opcodes. 484 */ 485void 486bprint_uint_arg(struct buf_pr *bp, const char *str, uint32_t arg) 487{ 488 489 if (str != NULL) 490 bprintf(bp, "%s", str); 491 if (arg == IP_FW_TARG) 492 bprintf(bp, "tablearg"); 493 else 494 bprintf(bp, "%u", arg); 495} 496 497/* 498 * Helper routine to print a possibly unaligned uint64_t on 499 * various platform. If width > 0, print the value with 500 * the desired width, followed by a space; 501 * otherwise, return the required width. 502 */ 503int 504pr_u64(struct buf_pr *b, uint64_t *pd, int width) 505{ 506#ifdef TCC 507#define U64_FMT "I64" 508#else 509#define U64_FMT "llu" 510#endif 511 uint64_t u; 512 unsigned long long d; 513 514 bcopy (pd, &u, sizeof(u)); 515 d = u; 516 return (width > 0) ? 517 bprintf(b, "%*" U64_FMT " ", width, d) : 518 snprintf(NULL, 0, "%" U64_FMT, d) ; 519#undef U64_FMT 520} 521 522 523void * 524safe_calloc(size_t number, size_t size) 525{ 526 void *ret = calloc(number, size); 527 528 if (ret == NULL) 529 err(EX_OSERR, "calloc"); 530 return ret; 531} 532 533void * 534safe_realloc(void *ptr, size_t size) 535{ 536 void *ret = realloc(ptr, size); 537 538 if (ret == NULL) 539 err(EX_OSERR, "realloc"); 540 return ret; 541} 542 543/* 544 * Compare things like interface or table names. 545 */ 546int 547stringnum_cmp(const char *a, const char *b) 548{ 549 int la, lb; 550 551 la = strlen(a); 552 lb = strlen(b); 553 554 if (la > lb) 555 return (1); 556 else if (la < lb) 557 return (-01); 558 559 return (strcmp(a, b)); 560} 561 562 563/* 564 * conditionally runs the command. 565 * Selected options or negative -> getsockopt 566 */ 567int 568do_cmd(int optname, void *optval, uintptr_t optlen) 569{ 570 int i; 571 572 if (co.test_only) 573 return 0; 574 575 if (ipfw_socket == -1) 576 ipfw_socket = socket(AF_INET, SOCK_RAW, IPPROTO_RAW); 577 if (ipfw_socket < 0) 578 err(EX_UNAVAILABLE, "socket"); 579 580 if (optname == IP_FW_GET || optname == IP_DUMMYNET_GET || 581 optname == IP_FW_ADD || optname == IP_FW3 || 582 optname == IP_FW_NAT_GET_CONFIG || 583 optname < 0 || 584 optname == IP_FW_NAT_GET_LOG) { 585 if (optname < 0) 586 optname = -optname; 587 i = getsockopt(ipfw_socket, IPPROTO_IP, optname, optval, 588 (socklen_t *)optlen); 589 } else { 590 i = setsockopt(ipfw_socket, IPPROTO_IP, optname, optval, optlen); 591 } 592 return i; 593} 594 595/* 596 * do_set3 - pass ipfw control cmd to kernel 597 * @optname: option name 598 * @optval: pointer to option data 599 * @optlen: option length 600 * 601 * Assumes op3 header is already embedded. 602 * Calls setsockopt() with IP_FW3 as kernel-visible opcode. 603 * Returns 0 on success or errno otherwise. 604 */ 605int 606do_set3(int optname, ip_fw3_opheader *op3, size_t optlen) 607{ 608 609 if (co.test_only) 610 return (0); 611 612 if (ipfw_socket == -1) 613 ipfw_socket = socket(AF_INET, SOCK_RAW, IPPROTO_RAW); 614 if (ipfw_socket < 0) 615 err(EX_UNAVAILABLE, "socket"); 616 617 op3->opcode = optname; 618 619 return (setsockopt(ipfw_socket, IPPROTO_IP, IP_FW3, op3, optlen)); 620} 621 622/* 623 * do_get3 - pass ipfw control cmd to kernel 624 * @optname: option name 625 * @optval: pointer to option data 626 * @optlen: pointer to option length 627 * 628 * Assumes op3 header is already embedded. 629 * Calls getsockopt() with IP_FW3 as kernel-visible opcode. 630 * Returns 0 on success or errno otherwise. 631 */ 632int 633do_get3(int optname, ip_fw3_opheader *op3, size_t *optlen) 634{ 635 int error; 636 socklen_t len; 637 638 if (co.test_only) 639 return (0); 640 641 if (ipfw_socket == -1) 642 ipfw_socket = socket(AF_INET, SOCK_RAW, IPPROTO_RAW); 643 if (ipfw_socket < 0) 644 err(EX_UNAVAILABLE, "socket"); 645 646 op3->opcode = optname; 647 648 len = *optlen; 649 error = getsockopt(ipfw_socket, IPPROTO_IP, IP_FW3, op3, &len); 650 *optlen = len; 651 652 return (error); 653} 654 655/** 656 * match_token takes a table and a string, returns the value associated 657 * with the string (-1 in case of failure). 658 */ 659int 660match_token(struct _s_x *table, const char *string) 661{ 662 struct _s_x *pt; 663 uint i = strlen(string); 664 665 for (pt = table ; i && pt->s != NULL ; pt++) 666 if (strlen(pt->s) == i && !bcmp(string, pt->s, i)) 667 return pt->x; 668 return (-1); 669} 670 671/** 672 * match_token_relaxed takes a table and a string, returns the value associated 673 * with the string for the best match. 674 * 675 * Returns: 676 * value from @table for matched records 677 * -1 for non-matched records 678 * -2 if more than one records match @string. 679 */ 680int 681match_token_relaxed(struct _s_x *table, const char *string) 682{ 683 struct _s_x *pt, *m; 684 int i, c; 685 686 i = strlen(string); 687 c = 0; 688 689 for (pt = table ; i != 0 && pt->s != NULL ; pt++) { 690 if (strncmp(pt->s, string, i) != 0) 691 continue; 692 m = pt; 693 c++; 694 } 695 696 if (c == 1) 697 return (m->x); 698 699 return (c > 0 ? -2: -1); 700} 701 702int 703get_token(struct _s_x *table, const char *string, const char *errbase) 704{ 705 int tcmd; 706 707 if ((tcmd = match_token_relaxed(table, string)) < 0) 708 errx(EX_USAGE, "%s %s %s", 709 (tcmd == 0) ? "invalid" : "ambiguous", errbase, string); 710 711 return (tcmd); 712} 713 714/** 715 * match_value takes a table and a value, returns the string associated 716 * with the value (NULL in case of failure). 717 */ 718char const * 719match_value(struct _s_x *p, int value) 720{ 721 for (; p->s != NULL; p++) 722 if (p->x == value) 723 return p->s; 724 return NULL; 725} 726 727size_t 728concat_tokens(char *buf, size_t bufsize, struct _s_x *table, char *delimiter) 729{ 730 struct _s_x *pt; 731 int l; 732 size_t sz; 733 734 for (sz = 0, pt = table ; pt->s != NULL; pt++) { 735 l = snprintf(buf + sz, bufsize - sz, "%s%s", 736 (sz == 0) ? "" : delimiter, pt->s); 737 sz += l; 738 bufsize += l; 739 if (sz > bufsize) 740 return (bufsize); 741 } 742 743 return (sz); 744} 745 746/* 747 * helper function to process a set of flags and set bits in the 748 * appropriate masks. 749 */ 750int 751fill_flags(struct _s_x *flags, char *p, char **e, uint32_t *set, 752 uint32_t *clear) 753{ 754 char *q; /* points to the separator */ 755 int val; 756 uint32_t *which; /* mask we are working on */ 757 758 while (p && *p) { 759 if (*p == '!') { 760 p++; 761 which = clear; 762 } else 763 which = set; 764 q = strchr(p, ','); 765 if (q) 766 *q++ = '\0'; 767 val = match_token(flags, p); 768 if (val <= 0) { 769 if (e != NULL) 770 *e = p; 771 return (-1); 772 } 773 *which |= (uint32_t)val; 774 p = q; 775 } 776 return (0); 777} 778 779void 780print_flags_buffer(char *buf, size_t sz, struct _s_x *list, uint32_t set) 781{ 782 char const *comma = ""; 783 int i, l; 784 785 for (i = 0; list[i].x != 0; i++) { 786 if ((set & list[i].x) == 0) 787 continue; 788 789 set &= ~list[i].x; 790 l = snprintf(buf, sz, "%s%s", comma, list[i].s); 791 if (l >= sz) 792 return; 793 comma = ","; 794 buf += l; 795 sz -=l; 796 } 797} 798 799/* 800 * _substrcmp takes two strings and returns 1 if they do not match, 801 * and 0 if they match exactly or the first string is a sub-string 802 * of the second. A warning is printed to stderr in the case that the 803 * first string is a sub-string of the second. 804 * 805 * This function will be removed in the future through the usual 806 * deprecation process. 807 */ 808int 809_substrcmp(const char *str1, const char* str2) 810{ 811 812 if (strncmp(str1, str2, strlen(str1)) != 0) 813 return 1; 814 815 if (strlen(str1) != strlen(str2)) 816 warnx("DEPRECATED: '%s' matched '%s' as a sub-string", 817 str1, str2); 818 return 0; 819} 820 821/* 822 * _substrcmp2 takes three strings and returns 1 if the first two do not match, 823 * and 0 if they match exactly or the second string is a sub-string 824 * of the first. A warning is printed to stderr in the case that the 825 * first string does not match the third. 826 * 827 * This function exists to warn about the bizarre construction 828 * strncmp(str, "by", 2) which is used to allow people to use a shortcut 829 * for "bytes". The problem is that in addition to accepting "by", 830 * "byt", "byte", and "bytes", it also excepts "by_rabid_dogs" and any 831 * other string beginning with "by". 832 * 833 * This function will be removed in the future through the usual 834 * deprecation process. 835 */ 836int 837_substrcmp2(const char *str1, const char* str2, const char* str3) 838{ 839 840 if (strncmp(str1, str2, strlen(str2)) != 0) 841 return 1; 842 843 if (strcmp(str1, str3) != 0) 844 warnx("DEPRECATED: '%s' matched '%s'", 845 str1, str3); 846 return 0; 847} 848 849/* 850 * prints one port, symbolic or numeric 851 */ 852static void 853print_port(struct buf_pr *bp, int proto, uint16_t port) 854{ 855 856 if (proto == IPPROTO_ETHERTYPE) { 857 char const *s; 858 859 if (co.do_resolv && (s = match_value(ether_types, port)) ) 860 bprintf(bp, "%s", s); 861 else 862 bprintf(bp, "0x%04x", port); 863 } else { 864 struct servent *se = NULL; 865 if (co.do_resolv) { 866 struct protoent *pe = getprotobynumber(proto); 867 868 se = getservbyport(htons(port), pe ? pe->p_name : NULL); 869 } 870 if (se) 871 bprintf(bp, "%s", se->s_name); 872 else 873 bprintf(bp, "%d", port); 874 } 875} 876 877static struct _s_x _port_name[] = { 878 {"dst-port", O_IP_DSTPORT}, 879 {"src-port", O_IP_SRCPORT}, 880 {"ipid", O_IPID}, 881 {"iplen", O_IPLEN}, 882 {"ipttl", O_IPTTL}, 883 {"mac-type", O_MAC_TYPE}, 884 {"tcpdatalen", O_TCPDATALEN}, 885 {"tcpmss", O_TCPMSS}, 886 {"tcpwin", O_TCPWIN}, 887 {"tagged", O_TAGGED}, 888 {NULL, 0} 889}; 890 891/* 892 * Print the values in a list 16-bit items of the types above. 893 * XXX todo: add support for mask. 894 */ 895static void 896print_newports(struct buf_pr *bp, ipfw_insn_u16 *cmd, int proto, int opcode) 897{ 898 uint16_t *p = cmd->ports; 899 int i; 900 char const *sep; 901 902 if (opcode != 0) { 903 sep = match_value(_port_name, opcode); 904 if (sep == NULL) 905 sep = "???"; 906 bprintf(bp, " %s", sep); 907 } 908 sep = " "; 909 for (i = F_LEN((ipfw_insn *)cmd) - 1; i > 0; i--, p += 2) { 910 bprintf(bp, "%s", sep); 911 print_port(bp, proto, p[0]); 912 if (p[0] != p[1]) { 913 bprintf(bp, "-"); 914 print_port(bp, proto, p[1]); 915 } 916 sep = ","; 917 } 918} 919 920/* 921 * Like strtol, but also translates service names into port numbers 922 * for some protocols. 923 * In particular: 924 * proto == -1 disables the protocol check; 925 * proto == IPPROTO_ETHERTYPE looks up an internal table 926 * proto == <some value in /etc/protocols> matches the values there. 927 * Returns *end == s in case the parameter is not found. 928 */ 929static int 930strtoport(char *s, char **end, int base, int proto) 931{ 932 char *p, *buf; 933 char *s1; 934 int i; 935 936 *end = s; /* default - not found */ 937 if (*s == '\0') 938 return 0; /* not found */ 939 940 if (isdigit(*s)) 941 return strtol(s, end, base); 942 943 /* 944 * find separator. '\\' escapes the next char. 945 */ 946 for (s1 = s; *s1 && (isalnum(*s1) || *s1 == '\\' || 947 *s1 == '_' || *s1 == '.') ; s1++) 948 if (*s1 == '\\' && s1[1] != '\0') 949 s1++; 950 951 buf = safe_calloc(s1 - s + 1, 1); 952 953 /* 954 * copy into a buffer skipping backslashes 955 */ 956 for (p = s, i = 0; p != s1 ; p++) 957 if (*p != '\\') 958 buf[i++] = *p; 959 buf[i++] = '\0'; 960 961 if (proto == IPPROTO_ETHERTYPE) { 962 i = match_token(ether_types, buf); 963 free(buf); 964 if (i != -1) { /* found */ 965 *end = s1; 966 return i; 967 } 968 } else { 969 struct protoent *pe = NULL; 970 struct servent *se; 971 972 if (proto != 0) 973 pe = getprotobynumber(proto); 974 setservent(1); 975 se = getservbyname(buf, pe ? pe->p_name : NULL); 976 free(buf); 977 if (se != NULL) { 978 *end = s1; 979 return ntohs(se->s_port); 980 } 981 } 982 return 0; /* not found */ 983} 984 985/* 986 * Fill the body of the command with the list of port ranges. 987 */ 988static int 989fill_newports(ipfw_insn_u16 *cmd, char *av, int proto, int cblen) 990{ 991 uint16_t a, b, *p = cmd->ports; 992 int i = 0; 993 char *s = av; 994 995 while (*s) { 996 a = strtoport(av, &s, 0, proto); 997 if (s == av) /* empty or invalid argument */ 998 return (0); 999 1000 CHECK_LENGTH(cblen, i + 2); 1001 1002 switch (*s) { 1003 case '-': /* a range */ 1004 av = s + 1; 1005 b = strtoport(av, &s, 0, proto); 1006 /* Reject expressions like '1-abc' or '1-2-3'. */ 1007 if (s == av || (*s != ',' && *s != '\0')) 1008 return (0); 1009 p[0] = a; 1010 p[1] = b; 1011 break; 1012 case ',': /* comma separated list */ 1013 case '\0': 1014 p[0] = p[1] = a; 1015 break; 1016 default: 1017 warnx("port list: invalid separator <%c> in <%s>", 1018 *s, av); 1019 return (0); 1020 } 1021 1022 i++; 1023 p += 2; 1024 av = s + 1; 1025 } 1026 if (i > 0) { 1027 if (i + 1 > F_LEN_MASK) 1028 errx(EX_DATAERR, "too many ports/ranges\n"); 1029 cmd->o.len |= i + 1; /* leave F_NOT and F_OR untouched */ 1030 } 1031 return (i); 1032} 1033 1034/* 1035 * Fill the body of the command with the list of DiffServ codepoints. 1036 */ 1037static void 1038fill_dscp(ipfw_insn *cmd, char *av, int cblen) 1039{ 1040 uint32_t *low, *high; 1041 char *s = av, *a; 1042 int code; 1043 1044 cmd->opcode = O_DSCP; 1045 cmd->len |= F_INSN_SIZE(ipfw_insn_u32) + 1; 1046 1047 CHECK_CMDLEN; 1048 1049 low = (uint32_t *)(cmd + 1); 1050 high = low + 1; 1051 1052 *low = 0; 1053 *high = 0; 1054 1055 while (s != NULL) { 1056 a = strchr(s, ','); 1057 1058 if (a != NULL) 1059 *a++ = '\0'; 1060 1061 if (isalpha(*s)) { 1062 if ((code = match_token(f_ipdscp, s)) == -1) 1063 errx(EX_DATAERR, "Unknown DSCP code"); 1064 } else { 1065 code = strtoul(s, NULL, 10); 1066 if (code < 0 || code > 63) 1067 errx(EX_DATAERR, "Invalid DSCP value"); 1068 } 1069 1070 if (code >= 32) 1071 *high |= 1 << (code - 32); 1072 else 1073 *low |= 1 << code; 1074 1075 s = a; 1076 } 1077} 1078 1079static struct _s_x icmpcodes[] = { 1080 { "net", ICMP_UNREACH_NET }, 1081 { "host", ICMP_UNREACH_HOST }, 1082 { "protocol", ICMP_UNREACH_PROTOCOL }, 1083 { "port", ICMP_UNREACH_PORT }, 1084 { "needfrag", ICMP_UNREACH_NEEDFRAG }, 1085 { "srcfail", ICMP_UNREACH_SRCFAIL }, 1086 { "net-unknown", ICMP_UNREACH_NET_UNKNOWN }, 1087 { "host-unknown", ICMP_UNREACH_HOST_UNKNOWN }, 1088 { "isolated", ICMP_UNREACH_ISOLATED }, 1089 { "net-prohib", ICMP_UNREACH_NET_PROHIB }, 1090 { "host-prohib", ICMP_UNREACH_HOST_PROHIB }, 1091 { "tosnet", ICMP_UNREACH_TOSNET }, 1092 { "toshost", ICMP_UNREACH_TOSHOST }, 1093 { "filter-prohib", ICMP_UNREACH_FILTER_PROHIB }, 1094 { "host-precedence", ICMP_UNREACH_HOST_PRECEDENCE }, 1095 { "precedence-cutoff", ICMP_UNREACH_PRECEDENCE_CUTOFF }, 1096 { NULL, 0 } 1097}; 1098 1099static void 1100fill_reject_code(u_short *codep, char *str) 1101{ 1102 int val; 1103 char *s; 1104 1105 val = strtoul(str, &s, 0); 1106 if (s == str || *s != '\0' || val >= 0x100) 1107 val = match_token(icmpcodes, str); 1108 if (val < 0) 1109 errx(EX_DATAERR, "unknown ICMP unreachable code ``%s''", str); 1110 *codep = val; 1111 return; 1112} 1113 1114static void 1115print_reject_code(struct buf_pr *bp, uint16_t code) 1116{ 1117 char const *s; 1118 1119 if ((s = match_value(icmpcodes, code)) != NULL) 1120 bprintf(bp, "unreach %s", s); 1121 else 1122 bprintf(bp, "unreach %u", code); 1123} 1124 1125/* 1126 * Returns the number of bits set (from left) in a contiguous bitmask, 1127 * or -1 if the mask is not contiguous. 1128 * XXX this needs a proper fix. 1129 * This effectively works on masks in big-endian (network) format. 1130 * when compiled on little endian architectures. 1131 * 1132 * First bit is bit 7 of the first byte -- note, for MAC addresses, 1133 * the first bit on the wire is bit 0 of the first byte. 1134 * len is the max length in bits. 1135 */ 1136int 1137contigmask(uint8_t *p, int len) 1138{ 1139 int i, n; 1140 1141 for (i=0; i<len ; i++) 1142 if ( (p[i/8] & (1 << (7 - (i%8)))) == 0) /* first bit unset */ 1143 break; 1144 for (n=i+1; n < len; n++) 1145 if ( (p[n/8] & (1 << (7 - (n%8)))) != 0) 1146 return -1; /* mask not contiguous */ 1147 return i; 1148} 1149 1150/* 1151 * print flags set/clear in the two bitmasks passed as parameters. 1152 * There is a specialized check for f_tcpflags. 1153 */ 1154static void 1155print_flags(struct buf_pr *bp, char const *name, ipfw_insn *cmd, 1156 struct _s_x *list) 1157{ 1158 char const *comma = ""; 1159 int i; 1160 uint8_t set = cmd->arg1 & 0xff; 1161 uint8_t clear = (cmd->arg1 >> 8) & 0xff; 1162 1163 if (list == f_tcpflags && set == TH_SYN && clear == TH_ACK) { 1164 bprintf(bp, " setup"); 1165 return; 1166 } 1167 1168 bprintf(bp, " %s ", name); 1169 for (i=0; list[i].x != 0; i++) { 1170 if (set & list[i].x) { 1171 set &= ~list[i].x; 1172 bprintf(bp, "%s%s", comma, list[i].s); 1173 comma = ","; 1174 } 1175 if (clear & list[i].x) { 1176 clear &= ~list[i].x; 1177 bprintf(bp, "%s!%s", comma, list[i].s); 1178 comma = ","; 1179 } 1180 } 1181} 1182 1183 1184/* 1185 * Print the ip address contained in a command. 1186 */ 1187static void 1188print_ip(struct buf_pr *bp, const struct format_opts *fo, ipfw_insn_ip *cmd) 1189{ 1190 struct hostent *he = NULL; 1191 struct in_addr *ia; 1192 uint32_t len = F_LEN((ipfw_insn *)cmd); 1193 uint32_t *a = ((ipfw_insn_u32 *)cmd)->d; 1194 char *t; 1195 1196 bprintf(bp, " "); 1197 if (cmd->o.opcode == O_IP_DST_LOOKUP && len > F_INSN_SIZE(ipfw_insn_u32)) { 1198 uint32_t d = a[1]; 1199 const char *arg = "<invalid>"; 1200 1201 if (d < sizeof(lookup_key)/sizeof(lookup_key[0])) 1202 arg = match_value(rule_options, lookup_key[d]); 1203 t = table_search_ctlv(fo->tstate, ((ipfw_insn *)cmd)->arg1); 1204 bprintf(bp, "lookup %s %s", arg, t); 1205 return; 1206 } 1207 if (cmd->o.opcode == O_IP_SRC_ME || cmd->o.opcode == O_IP_DST_ME) { 1208 bprintf(bp, "me"); 1209 return; 1210 } 1211 if (cmd->o.opcode == O_IP_SRC_LOOKUP || 1212 cmd->o.opcode == O_IP_DST_LOOKUP) { 1213 t = table_search_ctlv(fo->tstate, ((ipfw_insn *)cmd)->arg1); 1214 bprintf(bp, "table(%s", t); 1215 if (len == F_INSN_SIZE(ipfw_insn_u32)) 1216 bprintf(bp, ",%u", *a); 1217 bprintf(bp, ")"); 1218 return; 1219 } 1220 if (cmd->o.opcode == O_IP_SRC_SET || cmd->o.opcode == O_IP_DST_SET) { 1221 uint32_t x, *map = (uint32_t *)&(cmd->mask); 1222 int i, j; 1223 char comma = '{'; 1224 1225 x = cmd->o.arg1 - 1; 1226 x = htonl( ~x ); 1227 cmd->addr.s_addr = htonl(cmd->addr.s_addr); 1228 bprintf(bp, "%s/%d", inet_ntoa(cmd->addr), 1229 contigmask((uint8_t *)&x, 32)); 1230 x = cmd->addr.s_addr = htonl(cmd->addr.s_addr); 1231 x &= 0xff; /* base */ 1232 /* 1233 * Print bits and ranges. 1234 * Locate first bit set (i), then locate first bit unset (j). 1235 * If we have 3+ consecutive bits set, then print them as a 1236 * range, otherwise only print the initial bit and rescan. 1237 */ 1238 for (i=0; i < cmd->o.arg1; i++) 1239 if (map[i/32] & (1<<(i & 31))) { 1240 for (j=i+1; j < cmd->o.arg1; j++) 1241 if (!(map[ j/32] & (1<<(j & 31)))) 1242 break; 1243 bprintf(bp, "%c%d", comma, i+x); 1244 if (j>i+2) { /* range has at least 3 elements */ 1245 bprintf(bp, "-%d", j-1+x); 1246 i = j-1; 1247 } 1248 comma = ','; 1249 } 1250 bprintf(bp, "}"); 1251 return; 1252 } 1253 /* 1254 * len == 2 indicates a single IP, whereas lists of 1 or more 1255 * addr/mask pairs have len = (2n+1). We convert len to n so we 1256 * use that to count the number of entries. 1257 */ 1258 for (len = len / 2; len > 0; len--, a += 2) { 1259 int mb = /* mask length */ 1260 (cmd->o.opcode == O_IP_SRC || cmd->o.opcode == O_IP_DST) ? 1261 32 : contigmask((uint8_t *)&(a[1]), 32); 1262 if (mb == 32 && co.do_resolv) 1263 he = gethostbyaddr((char *)&(a[0]), sizeof(in_addr_t), 1264 AF_INET); 1265 if (he != NULL) /* resolved to name */ 1266 bprintf(bp, "%s", he->h_name); 1267 else if (mb == 0) /* any */ 1268 bprintf(bp, "any"); 1269 else { /* numeric IP followed by some kind of mask */ 1270 ia = (struct in_addr *)&a[0]; 1271 bprintf(bp, "%s", inet_ntoa(*ia)); 1272 if (mb < 0) { 1273 ia = (struct in_addr *)&a[1]; 1274 bprintf(bp, ":%s", inet_ntoa(*ia)); 1275 } else if (mb < 32) 1276 bprintf(bp, "/%d", mb); 1277 } 1278 if (len > 1) 1279 bprintf(bp, ","); 1280 } 1281} 1282 1283/* 1284 * prints a MAC address/mask pair 1285 */ 1286static void 1287format_mac(struct buf_pr *bp, uint8_t *addr, uint8_t *mask) 1288{ 1289 int l = contigmask(mask, 48); 1290 1291 if (l == 0) 1292 bprintf(bp, " any"); 1293 else { 1294 bprintf(bp, " %02x:%02x:%02x:%02x:%02x:%02x", 1295 addr[0], addr[1], addr[2], addr[3], addr[4], addr[5]); 1296 if (l == -1) 1297 bprintf(bp, "&%02x:%02x:%02x:%02x:%02x:%02x", 1298 mask[0], mask[1], mask[2], 1299 mask[3], mask[4], mask[5]); 1300 else if (l < 48) 1301 bprintf(bp, "/%d", l); 1302 } 1303} 1304 1305static void 1306print_mac(struct buf_pr *bp, ipfw_insn_mac *mac) 1307{ 1308 1309 bprintf(bp, " MAC"); 1310 format_mac(bp, mac->addr, mac->mask); 1311 format_mac(bp, mac->addr + 6, mac->mask + 6); 1312} 1313 1314static void 1315fill_icmptypes(ipfw_insn_u32 *cmd, char *av) 1316{ 1317 uint8_t type; 1318 1319 cmd->d[0] = 0; 1320 while (*av) { 1321 if (*av == ',') 1322 av++; 1323 1324 type = strtoul(av, &av, 0); 1325 1326 if (*av != ',' && *av != '\0') 1327 errx(EX_DATAERR, "invalid ICMP type"); 1328 1329 if (type > 31) 1330 errx(EX_DATAERR, "ICMP type out of range"); 1331 1332 cmd->d[0] |= 1 << type; 1333 } 1334 cmd->o.opcode = O_ICMPTYPE; 1335 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32); 1336} 1337 1338static void 1339print_icmptypes(struct buf_pr *bp, ipfw_insn_u32 *cmd) 1340{ 1341 int i; 1342 char sep= ' '; 1343 1344 bprintf(bp, " icmptypes"); 1345 for (i = 0; i < 32; i++) { 1346 if ( (cmd->d[0] & (1 << (i))) == 0) 1347 continue; 1348 bprintf(bp, "%c%d", sep, i); 1349 sep = ','; 1350 } 1351} 1352 1353static void 1354print_dscp(struct buf_pr *bp, ipfw_insn_u32 *cmd) 1355{ 1356 int i = 0; 1357 uint32_t *v; 1358 char sep= ' '; 1359 const char *code; 1360 1361 bprintf(bp, " dscp"); 1362 v = cmd->d; 1363 while (i < 64) { 1364 if (*v & (1 << i)) { 1365 if ((code = match_value(f_ipdscp, i)) != NULL) 1366 bprintf(bp, "%c%s", sep, code); 1367 else 1368 bprintf(bp, "%c%d", sep, i); 1369 sep = ','; 1370 } 1371 1372 if ((++i % 32) == 0) 1373 v++; 1374 } 1375} 1376 1377#define insntod(cmd, type) ((ipfw_insn_ ## type *)(cmd)) 1378struct show_state { 1379 struct ip_fw_rule *rule; 1380 const ipfw_insn *eaction; 1381 uint8_t *printed; 1382 int flags; 1383#define HAVE_PROTO 0x0001 1384#define HAVE_SRCIP 0x0002 1385#define HAVE_DSTIP 0x0004 1386#define HAVE_PROBE_STATE 0x0008 1387 int proto; 1388 int or_block; 1389}; 1390 1391static int 1392init_show_state(struct show_state *state, struct ip_fw_rule *rule) 1393{ 1394 1395 state->printed = calloc(rule->cmd_len, sizeof(uint8_t)); 1396 if (state->printed == NULL) 1397 return (ENOMEM); 1398 state->rule = rule; 1399 state->eaction = NULL; 1400 state->flags = 0; 1401 state->proto = 0; 1402 state->or_block = 0; 1403 return (0); 1404} 1405 1406static void 1407free_show_state(struct show_state *state) 1408{ 1409 1410 free(state->printed); 1411} 1412 1413static uint8_t 1414is_printed_opcode(struct show_state *state, const ipfw_insn *cmd) 1415{ 1416 1417 return (state->printed[cmd - state->rule->cmd]); 1418} 1419 1420static void 1421mark_printed(struct show_state *state, const ipfw_insn *cmd) 1422{ 1423 1424 state->printed[cmd - state->rule->cmd] = 1; 1425} 1426 1427static void 1428print_limit_mask(struct buf_pr *bp, const ipfw_insn_limit *limit) 1429{ 1430 struct _s_x *p = limit_masks; 1431 char const *comma = " "; 1432 uint8_t x; 1433 1434 for (x = limit->limit_mask; p->x != 0; p++) { 1435 if ((x & p->x) == p->x) { 1436 x &= ~p->x; 1437 bprintf(bp, "%s%s", comma, p->s); 1438 comma = ","; 1439 } 1440 } 1441 bprint_uint_arg(bp, " ", limit->conn_limit); 1442} 1443 1444static int 1445print_instruction(struct buf_pr *bp, const struct format_opts *fo, 1446 struct show_state *state, ipfw_insn *cmd) 1447{ 1448 struct protoent *pe; 1449 struct passwd *pwd; 1450 struct group *grp; 1451 const char *s; 1452 double d; 1453 1454 if (is_printed_opcode(state, cmd)) 1455 return (0); 1456 if ((cmd->len & F_OR) != 0 && state->or_block == 0) 1457 bprintf(bp, " {"); 1458 if (cmd->opcode != O_IN && (cmd->len & F_NOT) != 0) 1459 bprintf(bp, " not"); 1460 1461 switch (cmd->opcode) { 1462 case O_PROB: 1463 d = 1.0 * insntod(cmd, u32)->d[0] / 0x7fffffff; 1464 bprintf(bp, "prob %f ", d); 1465 break; 1466 case O_PROBE_STATE: /* no need to print anything here */ 1467 state->flags |= HAVE_PROBE_STATE; 1468 break; 1469 case O_IP_SRC: 1470 case O_IP_SRC_LOOKUP: 1471 case O_IP_SRC_MASK: 1472 case O_IP_SRC_ME: 1473 case O_IP_SRC_SET: 1474 if (state->flags & HAVE_SRCIP) 1475 bprintf(bp, " src-ip"); 1476 print_ip(bp, fo, insntod(cmd, ip)); 1477 break; 1478 case O_IP_DST: 1479 case O_IP_DST_LOOKUP: 1480 case O_IP_DST_MASK: 1481 case O_IP_DST_ME: 1482 case O_IP_DST_SET: 1483 if (state->flags & HAVE_DSTIP) 1484 bprintf(bp, " dst-ip"); 1485 print_ip(bp, fo, insntod(cmd, ip)); 1486 break; 1487 case O_IP6_SRC: 1488 case O_IP6_SRC_MASK: 1489 case O_IP6_SRC_ME: 1490 if (state->flags & HAVE_SRCIP) 1491 bprintf(bp, " src-ip6"); 1492 print_ip6(bp, insntod(cmd, ip6)); 1493 break; 1494 case O_IP6_DST: 1495 case O_IP6_DST_MASK: 1496 case O_IP6_DST_ME: 1497 if (state->flags & HAVE_DSTIP) 1498 bprintf(bp, " dst-ip6"); 1499 print_ip6(bp, insntod(cmd, ip6)); 1500 break; 1501 case O_FLOW6ID: 1502 print_flow6id(bp, insntod(cmd, u32)); 1503 break; 1504 case O_IP_DSTPORT: 1505 case O_IP_SRCPORT: 1506 print_newports(bp, insntod(cmd, u16), state->proto, 1507 (state->flags & (HAVE_SRCIP | HAVE_DSTIP)) == 1508 (HAVE_SRCIP | HAVE_DSTIP) ? cmd->opcode: 0); 1509 break; 1510 case O_PROTO: 1511 pe = getprotobynumber(cmd->arg1); 1512 if (state->flags & HAVE_PROTO) 1513 bprintf(bp, " proto"); 1514 if (pe != NULL) 1515 bprintf(bp, " %s", pe->p_name); 1516 else 1517 bprintf(bp, " %u", cmd->arg1); 1518 state->proto = cmd->arg1; 1519 break; 1520 case O_MACADDR2: 1521 print_mac(bp, insntod(cmd, mac)); 1522 break; 1523 case O_MAC_TYPE: 1524 print_newports(bp, insntod(cmd, u16), 1525 IPPROTO_ETHERTYPE, cmd->opcode); 1526 break; 1527 case O_FRAG: 1528 bprintf(bp, " frag"); 1529 break; 1530 case O_FIB: 1531 bprintf(bp, " fib %u", cmd->arg1); 1532 break; 1533 case O_SOCKARG: 1534 bprintf(bp, " sockarg"); 1535 break; 1536 case O_IN: 1537 bprintf(bp, cmd->len & F_NOT ? " out" : " in"); 1538 break; 1539 case O_DIVERTED: 1540 switch (cmd->arg1) { 1541 case 3: 1542 bprintf(bp, " diverted"); 1543 break; 1544 case 2: 1545 bprintf(bp, " diverted-output"); 1546 break; 1547 case 1: 1548 bprintf(bp, " diverted-loopback"); 1549 break; 1550 default: 1551 bprintf(bp, " diverted-?<%u>", cmd->arg1); 1552 break; 1553 } 1554 break; 1555 case O_LAYER2: 1556 bprintf(bp, " layer2"); 1557 break; 1558 case O_XMIT: 1559 case O_RECV: 1560 case O_VIA: 1561 if (cmd->opcode == O_XMIT) 1562 s = "xmit"; 1563 else if (cmd->opcode == O_RECV) 1564 s = "recv"; 1565 else /* if (cmd->opcode == O_VIA) */ 1566 s = "via"; 1567 switch (insntod(cmd, if)->name[0]) { 1568 case '\0': 1569 bprintf(bp, " %s %s", s, 1570 inet_ntoa(insntod(cmd, if)->p.ip)); 1571 break; 1572 case '\1': 1573 bprintf(bp, " %s table(%s)", s, 1574 table_search_ctlv(fo->tstate, 1575 insntod(cmd, if)->p.kidx)); 1576 break; 1577 default: 1578 bprintf(bp, " %s %s", s, 1579 insntod(cmd, if)->name); 1580 } 1581 break; 1582 case O_IP_FLOW_LOOKUP: 1583 s = table_search_ctlv(fo->tstate, cmd->arg1); 1584 bprintf(bp, " flow table(%s", s); 1585 if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_u32)) 1586 bprintf(bp, ",%u", insntod(cmd, u32)->d[0]); 1587 bprintf(bp, ")"); 1588 break; 1589 case O_IPID: 1590 case O_IPTTL: 1591 case O_IPLEN: 1592 case O_TCPDATALEN: 1593 case O_TCPMSS: 1594 case O_TCPWIN: 1595 if (F_LEN(cmd) == 1) { 1596 switch (cmd->opcode) { 1597 case O_IPID: 1598 s = "ipid"; 1599 break; 1600 case O_IPTTL: 1601 s = "ipttl"; 1602 break; 1603 case O_IPLEN: 1604 s = "iplen"; 1605 break; 1606 case O_TCPDATALEN: 1607 s = "tcpdatalen"; 1608 break; 1609 case O_TCPMSS: 1610 s = "tcpmss"; 1611 break; 1612 case O_TCPWIN: 1613 s = "tcpwin"; 1614 break; 1615 } 1616 bprintf(bp, " %s %u", s, cmd->arg1); 1617 } else 1618 print_newports(bp, insntod(cmd, u16), 0, 1619 cmd->opcode); 1620 break; 1621 case O_IPVER: 1622 bprintf(bp, " ipver %u", cmd->arg1); 1623 break; 1624 case O_IPPRECEDENCE: 1625 bprintf(bp, " ipprecedence %u", cmd->arg1 >> 5); 1626 break; 1627 case O_DSCP: 1628 print_dscp(bp, insntod(cmd, u32)); 1629 break; 1630 case O_IPOPT: 1631 print_flags(bp, "ipoptions", cmd, f_ipopts); 1632 break; 1633 case O_IPTOS: 1634 print_flags(bp, "iptos", cmd, f_iptos); 1635 break; 1636 case O_ICMPTYPE: 1637 print_icmptypes(bp, insntod(cmd, u32)); 1638 break; 1639 case O_ESTAB: 1640 bprintf(bp, " established"); 1641 break; 1642 case O_TCPFLAGS: 1643 print_flags(bp, "tcpflags", cmd, f_tcpflags); 1644 break; 1645 case O_TCPOPTS: 1646 print_flags(bp, "tcpoptions", cmd, f_tcpopts); 1647 break; 1648 case O_TCPACK: 1649 bprintf(bp, " tcpack %d", 1650 ntohl(insntod(cmd, u32)->d[0])); 1651 break; 1652 case O_TCPSEQ: 1653 bprintf(bp, " tcpseq %d", 1654 ntohl(insntod(cmd, u32)->d[0])); 1655 break; 1656 case O_UID: 1657 pwd = getpwuid(insntod(cmd, u32)->d[0]); 1658 if (pwd != NULL) 1659 bprintf(bp, " uid %s", pwd->pw_name); 1660 else 1661 bprintf(bp, " uid %u", 1662 insntod(cmd, u32)->d[0]); 1663 break; 1664 case O_GID: 1665 grp = getgrgid(insntod(cmd, u32)->d[0]); 1666 if (grp != NULL) 1667 bprintf(bp, " gid %s", grp->gr_name); 1668 else 1669 bprintf(bp, " gid %u", 1670 insntod(cmd, u32)->d[0]); 1671 break; 1672 case O_JAIL: 1673 bprintf(bp, " jail %d", insntod(cmd, u32)->d[0]); 1674 break; 1675 case O_VERREVPATH: 1676 bprintf(bp, " verrevpath"); 1677 break; 1678 case O_VERSRCREACH: 1679 bprintf(bp, " versrcreach"); 1680 break; 1681 case O_ANTISPOOF: 1682 bprintf(bp, " antispoof"); 1683 break; 1684 case O_IPSEC: 1685 bprintf(bp, " ipsec"); 1686 break; 1687 case O_NOP: 1688 bprintf(bp, " // %s", (char *)(cmd + 1)); 1689 break; 1690 case O_KEEP_STATE: 1691 if (state->flags & HAVE_PROBE_STATE) 1692 bprintf(bp, " keep-state"); 1693 else 1694 bprintf(bp, " record-state"); 1695 bprintf(bp, " :%s", 1696 object_search_ctlv(fo->tstate, cmd->arg1, 1697 IPFW_TLV_STATE_NAME)); 1698 break; 1699 case O_LIMIT: 1700 if (state->flags & HAVE_PROBE_STATE) 1701 bprintf(bp, " limit"); 1702 else 1703 bprintf(bp, " set-limit"); 1704 print_limit_mask(bp, insntod(cmd, limit)); 1705 bprintf(bp, " :%s", 1706 object_search_ctlv(fo->tstate, cmd->arg1, 1707 IPFW_TLV_STATE_NAME)); 1708 break; 1709 case O_IP6: 1710 if (state->flags & HAVE_PROTO) 1711 bprintf(bp, " proto"); 1712 bprintf(bp, " ip6"); 1713 break; 1714 case O_IP4: 1715 if (state->flags & HAVE_PROTO) 1716 bprintf(bp, " proto"); 1717 bprintf(bp, " ip4"); 1718 break; 1719 case O_ICMP6TYPE: 1720 print_icmp6types(bp, insntod(cmd, u32)); 1721 break; 1722 case O_EXT_HDR: 1723 print_ext6hdr(bp, cmd); 1724 break; 1725 case O_TAGGED: 1726 if (F_LEN(cmd) == 1) 1727 bprint_uint_arg(bp, " tagged ", cmd->arg1); 1728 else 1729 print_newports(bp, insntod(cmd, u16), 1730 0, O_TAGGED); 1731 break; 1732 case O_SKIP_ACTION: 1733 bprintf(bp, " defer-immediate-action"); 1734 break; 1735 default: 1736 bprintf(bp, " [opcode %d len %d]", cmd->opcode, 1737 cmd->len); 1738 } 1739 if (cmd->len & F_OR) { 1740 bprintf(bp, " or"); 1741 state->or_block = 1; 1742 } else if (state->or_block != 0) { 1743 bprintf(bp, " }"); 1744 state->or_block = 0; 1745 } 1746 mark_printed(state, cmd); 1747 1748 return (1); 1749} 1750 1751static ipfw_insn * 1752print_opcode(struct buf_pr *bp, struct format_opts *fo, 1753 struct show_state *state, int opcode) 1754{ 1755 ipfw_insn *cmd; 1756 int l; 1757 1758 for (l = state->rule->act_ofs, cmd = state->rule->cmd; 1759 l > 0; l -= F_LEN(cmd), cmd += F_LEN(cmd)) { 1760 /* We use zero opcode to print the rest of options */ 1761 if (opcode >= 0 && cmd->opcode != opcode) 1762 continue; 1763 /* 1764 * Skip O_NOP, when we printing the rest 1765 * of options, it will be handled separately. 1766 */ 1767 if (cmd->opcode == O_NOP && opcode != O_NOP) 1768 continue; 1769 if (!print_instruction(bp, fo, state, cmd)) 1770 continue; 1771 return (cmd); 1772 } 1773 return (NULL); 1774} 1775 1776static void 1777print_fwd(struct buf_pr *bp, const ipfw_insn *cmd) 1778{ 1779 char buf[INET6_ADDRSTRLEN + IF_NAMESIZE + 2]; 1780 ipfw_insn_sa6 *sa6; 1781 ipfw_insn_sa *sa; 1782 uint16_t port; 1783 1784 if (cmd->opcode == O_FORWARD_IP) { 1785 sa = insntod(cmd, sa); 1786 port = sa->sa.sin_port; 1787 if (sa->sa.sin_addr.s_addr == INADDR_ANY) 1788 bprintf(bp, "fwd tablearg"); 1789 else 1790 bprintf(bp, "fwd %s", inet_ntoa(sa->sa.sin_addr)); 1791 } else { 1792 sa6 = insntod(cmd, sa6); 1793 port = sa6->sa.sin6_port; 1794 bprintf(bp, "fwd "); 1795 if (getnameinfo((const struct sockaddr *)&sa6->sa, 1796 sizeof(struct sockaddr_in6), buf, sizeof(buf), NULL, 0, 1797 NI_NUMERICHOST) == 0) 1798 bprintf(bp, "%s", buf); 1799 } 1800 if (port != 0) 1801 bprintf(bp, ",%u", port); 1802} 1803 1804static int 1805print_action_instruction(struct buf_pr *bp, const struct format_opts *fo, 1806 struct show_state *state, const ipfw_insn *cmd) 1807{ 1808 const char *s; 1809 1810 if (is_printed_opcode(state, cmd)) 1811 return (0); 1812 switch (cmd->opcode) { 1813 case O_CHECK_STATE: 1814 bprintf(bp, "check-state"); 1815 if (cmd->arg1 != 0) 1816 s = object_search_ctlv(fo->tstate, cmd->arg1, 1817 IPFW_TLV_STATE_NAME); 1818 else 1819 s = NULL; 1820 bprintf(bp, " :%s", s ? s: "any"); 1821 break; 1822 case O_ACCEPT: 1823 bprintf(bp, "allow"); 1824 break; 1825 case O_COUNT: 1826 bprintf(bp, "count"); 1827 break; 1828 case O_DENY: 1829 bprintf(bp, "deny"); 1830 break; 1831 case O_REJECT: 1832 if (cmd->arg1 == ICMP_REJECT_RST) 1833 bprintf(bp, "reset"); 1834 else if (cmd->arg1 == ICMP_REJECT_ABORT) 1835 bprintf(bp, "abort"); 1836 else if (cmd->arg1 == ICMP_UNREACH_HOST) 1837 bprintf(bp, "reject"); 1838 else 1839 print_reject_code(bp, cmd->arg1); 1840 break; 1841 case O_UNREACH6: 1842 if (cmd->arg1 == ICMP6_UNREACH_RST) 1843 bprintf(bp, "reset6"); 1844 else if (cmd->arg1 == ICMP6_UNREACH_ABORT) 1845 bprintf(bp, "abort6"); 1846 else 1847 print_unreach6_code(bp, cmd->arg1); 1848 break; 1849 case O_SKIPTO: 1850 bprint_uint_arg(bp, "skipto ", cmd->arg1); 1851 break; 1852 case O_PIPE: 1853 bprint_uint_arg(bp, "pipe ", cmd->arg1); 1854 break; 1855 case O_QUEUE: 1856 bprint_uint_arg(bp, "queue ", cmd->arg1); 1857 break; 1858 case O_DIVERT: 1859 bprint_uint_arg(bp, "divert ", cmd->arg1); 1860 break; 1861 case O_TEE: 1862 bprint_uint_arg(bp, "tee ", cmd->arg1); 1863 break; 1864 case O_NETGRAPH: 1865 bprint_uint_arg(bp, "netgraph ", cmd->arg1); 1866 break; 1867 case O_NGTEE: 1868 bprint_uint_arg(bp, "ngtee ", cmd->arg1); 1869 break; 1870 case O_FORWARD_IP: 1871 case O_FORWARD_IP6: 1872 print_fwd(bp, cmd); 1873 break; 1874 case O_LOG: 1875 if (insntod(cmd, log)->max_log > 0) 1876 bprintf(bp, " log logamount %d", 1877 insntod(cmd, log)->max_log); 1878 else 1879 bprintf(bp, " log"); 1880 break; 1881 case O_ALTQ: 1882#ifndef NO_ALTQ 1883 print_altq_cmd(bp, insntod(cmd, altq)); 1884#endif 1885 break; 1886 case O_TAG: 1887 bprint_uint_arg(bp, cmd->len & F_NOT ? " untag ": 1888 " tag ", cmd->arg1); 1889 break; 1890 case O_NAT: 1891 if (cmd->arg1 != IP_FW_NAT44_GLOBAL) 1892 bprint_uint_arg(bp, "nat ", cmd->arg1); 1893 else 1894 bprintf(bp, "nat global"); 1895 break; 1896 case O_SETFIB: 1897 if (cmd->arg1 == IP_FW_TARG) 1898 bprint_uint_arg(bp, "setfib ", cmd->arg1); 1899 else 1900 bprintf(bp, "setfib %u", cmd->arg1 & 0x7FFF); 1901 break; 1902 case O_EXTERNAL_ACTION: 1903 /* 1904 * The external action can consists of two following 1905 * each other opcodes - O_EXTERNAL_ACTION and 1906 * O_EXTERNAL_INSTANCE. The first contains the ID of 1907 * name of external action. The second contains the ID 1908 * of name of external action instance. 1909 * NOTE: in case when external action has no named 1910 * instances support, the second opcode isn't needed. 1911 */ 1912 state->eaction = cmd; 1913 s = object_search_ctlv(fo->tstate, cmd->arg1, 1914 IPFW_TLV_EACTION); 1915 if (match_token(rule_eactions, s) != -1) 1916 bprintf(bp, "%s", s); 1917 else 1918 bprintf(bp, "eaction %s", s); 1919 break; 1920 case O_EXTERNAL_INSTANCE: 1921 if (state->eaction == NULL) 1922 break; 1923 /* 1924 * XXX: we need to teach ipfw(9) to rewrite opcodes 1925 * in the user buffer on rule addition. When we add 1926 * the rule, we specify zero TLV type for 1927 * O_EXTERNAL_INSTANCE object. To show correct 1928 * rule after `ipfw add` we need to search instance 1929 * name with zero type. But when we do `ipfw show` 1930 * we calculate TLV type using IPFW_TLV_EACTION_NAME() 1931 * macro. 1932 */ 1933 s = object_search_ctlv(fo->tstate, cmd->arg1, 0); 1934 if (s == NULL) 1935 s = object_search_ctlv(fo->tstate, 1936 cmd->arg1, IPFW_TLV_EACTION_NAME( 1937 state->eaction->arg1)); 1938 bprintf(bp, " %s", s); 1939 break; 1940 case O_EXTERNAL_DATA: 1941 if (state->eaction == NULL) 1942 break; 1943 /* 1944 * Currently we support data formatting only for 1945 * external data with datalen u16. For unknown data 1946 * print its size in bytes. 1947 */ 1948 if (cmd->len == F_INSN_SIZE(ipfw_insn)) 1949 bprintf(bp, " %u", cmd->arg1); 1950 else 1951 bprintf(bp, " %ubytes", 1952 cmd->len * sizeof(uint32_t)); 1953 break; 1954 case O_SETDSCP: 1955 if (cmd->arg1 == IP_FW_TARG) { 1956 bprintf(bp, "setdscp tablearg"); 1957 break; 1958 } 1959 s = match_value(f_ipdscp, cmd->arg1 & 0x3F); 1960 if (s != NULL) 1961 bprintf(bp, "setdscp %s", s); 1962 else 1963 bprintf(bp, "setdscp %u", cmd->arg1 & 0x3F); 1964 break; 1965 case O_REASS: 1966 bprintf(bp, "reass"); 1967 break; 1968 case O_CALLRETURN: 1969 if (cmd->len & F_NOT) 1970 bprintf(bp, "return"); 1971 else 1972 bprint_uint_arg(bp, "call ", cmd->arg1); 1973 break; 1974 default: 1975 bprintf(bp, "** unrecognized action %d len %d ", 1976 cmd->opcode, cmd->len); 1977 } 1978 mark_printed(state, cmd); 1979 1980 return (1); 1981} 1982 1983 1984static ipfw_insn * 1985print_action(struct buf_pr *bp, struct format_opts *fo, 1986 struct show_state *state, uint8_t opcode) 1987{ 1988 ipfw_insn *cmd; 1989 int l; 1990 1991 for (l = state->rule->cmd_len - state->rule->act_ofs, 1992 cmd = ACTION_PTR(state->rule); l > 0; 1993 l -= F_LEN(cmd), cmd += F_LEN(cmd)) { 1994 if (cmd->opcode != opcode) 1995 continue; 1996 if (!print_action_instruction(bp, fo, state, cmd)) 1997 continue; 1998 return (cmd); 1999 } 2000 return (NULL); 2001} 2002 2003static void 2004print_proto(struct buf_pr *bp, struct format_opts *fo, 2005 struct show_state *state) 2006{ 2007 ipfw_insn *cmd; 2008 int l, proto, ip4, ip6; 2009 2010 /* Count all O_PROTO, O_IP4, O_IP6 instructions. */ 2011 proto = ip4 = ip6 = 0; 2012 for (l = state->rule->act_ofs, cmd = state->rule->cmd; 2013 l > 0; l -= F_LEN(cmd), cmd += F_LEN(cmd)) { 2014 switch (cmd->opcode) { 2015 case O_PROTO: 2016 proto++; 2017 break; 2018 case O_IP4: 2019 ip4 = 1; 2020 if (cmd->len & F_OR) 2021 ip4++; 2022 break; 2023 case O_IP6: 2024 ip6 = 1; 2025 if (cmd->len & F_OR) 2026 ip6++; 2027 break; 2028 default: 2029 continue; 2030 } 2031 } 2032 if (proto == 0 && ip4 == 0 && ip6 == 0) { 2033 state->proto = IPPROTO_IP; 2034 state->flags |= HAVE_PROTO; 2035 bprintf(bp, " ip"); 2036 return; 2037 } 2038 /* To handle the case { ip4 or ip6 }, print opcode with F_OR first */ 2039 cmd = NULL; 2040 if (ip4 || ip6) 2041 cmd = print_opcode(bp, fo, state, ip4 > ip6 ? O_IP4: O_IP6); 2042 if (cmd != NULL && (cmd->len & F_OR)) 2043 cmd = print_opcode(bp, fo, state, ip4 > ip6 ? O_IP6: O_IP4); 2044 if (cmd == NULL || (cmd->len & F_OR)) 2045 for (l = proto; l > 0; l--) { 2046 cmd = print_opcode(bp, fo, state, O_PROTO); 2047 if (cmd == NULL || (cmd->len & F_OR) == 0) 2048 break; 2049 } 2050 /* Initialize proto, it is used by print_newports() */ 2051 state->flags |= HAVE_PROTO; 2052 if (state->proto == 0 && ip6 != 0) 2053 state->proto = IPPROTO_IPV6; 2054} 2055 2056static int 2057match_opcode(int opcode, const int opcodes[], size_t nops) 2058{ 2059 int i; 2060 2061 for (i = 0; i < nops; i++) 2062 if (opcode == opcodes[i]) 2063 return (1); 2064 return (0); 2065} 2066 2067static void 2068print_address(struct buf_pr *bp, struct format_opts *fo, 2069 struct show_state *state, const int opcodes[], size_t nops, int portop, 2070 int flag) 2071{ 2072 ipfw_insn *cmd; 2073 int count, l, portcnt, pf; 2074 2075 count = portcnt = 0; 2076 for (l = state->rule->act_ofs, cmd = state->rule->cmd; 2077 l > 0; l -= F_LEN(cmd), cmd += F_LEN(cmd)) { 2078 if (match_opcode(cmd->opcode, opcodes, nops)) 2079 count++; 2080 else if (cmd->opcode == portop) 2081 portcnt++; 2082 } 2083 if (count == 0) 2084 bprintf(bp, " any"); 2085 for (l = state->rule->act_ofs, cmd = state->rule->cmd; 2086 l > 0 && count > 0; l -= F_LEN(cmd), cmd += F_LEN(cmd)) { 2087 if (!match_opcode(cmd->opcode, opcodes, nops)) 2088 continue; 2089 print_instruction(bp, fo, state, cmd); 2090 if ((cmd->len & F_OR) == 0) 2091 break; 2092 count--; 2093 } 2094 /* 2095 * If several O_IP_?PORT opcodes specified, leave them to the 2096 * options section. 2097 */ 2098 if (portcnt == 1) { 2099 for (l = state->rule->act_ofs, cmd = state->rule->cmd, pf = 0; 2100 l > 0; l -= F_LEN(cmd), cmd += F_LEN(cmd)) { 2101 if (cmd->opcode != portop) { 2102 pf = (cmd->len & F_OR); 2103 continue; 2104 } 2105 /* Print opcode iff it is not in OR block. */ 2106 if (pf == 0 && (cmd->len & F_OR) == 0) 2107 print_instruction(bp, fo, state, cmd); 2108 break; 2109 } 2110 } 2111 state->flags |= flag; 2112} 2113 2114static const int action_opcodes[] = { 2115 O_CHECK_STATE, O_ACCEPT, O_COUNT, O_DENY, O_REJECT, 2116 O_UNREACH6, O_SKIPTO, O_PIPE, O_QUEUE, O_DIVERT, O_TEE, 2117 O_NETGRAPH, O_NGTEE, O_FORWARD_IP, O_FORWARD_IP6, O_NAT, 2118 O_SETFIB, O_SETDSCP, O_REASS, O_CALLRETURN, 2119 /* keep the following opcodes at the end of the list */ 2120 O_EXTERNAL_ACTION, O_EXTERNAL_INSTANCE, O_EXTERNAL_DATA 2121}; 2122 2123static const int modifier_opcodes[] = { 2124 O_LOG, O_ALTQ, O_TAG 2125}; 2126 2127static const int src_opcodes[] = { 2128 O_IP_SRC, O_IP_SRC_LOOKUP, O_IP_SRC_MASK, O_IP_SRC_ME, 2129 O_IP_SRC_SET, O_IP6_SRC, O_IP6_SRC_MASK, O_IP6_SRC_ME 2130}; 2131 2132static const int dst_opcodes[] = { 2133 O_IP_DST, O_IP_DST_LOOKUP, O_IP_DST_MASK, O_IP_DST_ME, 2134 O_IP_DST_SET, O_IP6_DST, O_IP6_DST_MASK, O_IP6_DST_ME 2135}; 2136 2137static void 2138show_static_rule(struct cmdline_opts *co, struct format_opts *fo, 2139 struct buf_pr *bp, struct ip_fw_rule *rule, struct ip_fw_bcounter *cntr) 2140{ 2141 struct show_state state; 2142 ipfw_insn *cmd; 2143 static int twidth = 0; 2144 int i; 2145 2146 /* Print # DISABLED or skip the rule */ 2147 if ((fo->set_mask & (1 << rule->set)) == 0) { 2148 /* disabled mask */ 2149 if (!co->show_sets) 2150 return; 2151 else 2152 bprintf(bp, "# DISABLED "); 2153 } 2154 if (init_show_state(&state, rule) != 0) { 2155 warn("init_show_state() failed"); 2156 return; 2157 } 2158 bprintf(bp, "%05u ", rule->rulenum); 2159 2160 /* only if counters are available */ 2161 if (cntr != NULL) { 2162 /* Print counters if enabled */ 2163 if (fo->pcwidth > 0 || fo->bcwidth > 0) { 2164 pr_u64(bp, &cntr->pcnt, fo->pcwidth); 2165 pr_u64(bp, &cntr->bcnt, fo->bcwidth); 2166 } 2167 2168 /* Print timestamp */ 2169 if (co->do_time == TIMESTAMP_NUMERIC) 2170 bprintf(bp, "%10u ", cntr->timestamp); 2171 else if (co->do_time == TIMESTAMP_STRING) { 2172 char timestr[30]; 2173 time_t t = (time_t)0; 2174 2175 if (twidth == 0) { 2176 strcpy(timestr, ctime(&t)); 2177 *strchr(timestr, '\n') = '\0'; 2178 twidth = strlen(timestr); 2179 } 2180 if (cntr->timestamp > 0) { 2181 t = _long_to_time(cntr->timestamp); 2182 2183 strcpy(timestr, ctime(&t)); 2184 *strchr(timestr, '\n') = '\0'; 2185 bprintf(bp, "%s ", timestr); 2186 } else { 2187 bprintf(bp, "%*s", twidth, " "); 2188 } 2189 } 2190 } 2191 2192 /* Print set number */ 2193 if (co->show_sets) 2194 bprintf(bp, "set %d ", rule->set); 2195 2196 /* Print the optional "match probability" */ 2197 cmd = print_opcode(bp, fo, &state, O_PROB); 2198 /* Print rule action */ 2199 for (i = 0; i < nitems(action_opcodes); i++) { 2200 cmd = print_action(bp, fo, &state, action_opcodes[i]); 2201 if (cmd == NULL) 2202 continue; 2203 /* Handle special cases */ 2204 switch (cmd->opcode) { 2205 case O_CHECK_STATE: 2206 goto end; 2207 case O_EXTERNAL_ACTION: 2208 case O_EXTERNAL_INSTANCE: 2209 /* External action can have several instructions */ 2210 continue; 2211 } 2212 break; 2213 } 2214 /* Print rule modifiers */ 2215 for (i = 0; i < nitems(modifier_opcodes); i++) 2216 print_action(bp, fo, &state, modifier_opcodes[i]); 2217 /* 2218 * Print rule body 2219 */ 2220 if (co->comment_only != 0) 2221 goto end; 2222 2223 if (rule->flags & IPFW_RULE_JUSTOPTS) { 2224 state.flags |= HAVE_PROTO | HAVE_SRCIP | HAVE_DSTIP; 2225 goto justopts; 2226 } 2227 2228 print_proto(bp, fo, &state); 2229 if (co->do_compact != 0 && (rule->flags & IPFW_RULE_NOOPT)) 2230 goto justopts; 2231 2232 /* Print source */ 2233 bprintf(bp, " from"); 2234 print_address(bp, fo, &state, src_opcodes, nitems(src_opcodes), 2235 O_IP_SRCPORT, HAVE_SRCIP); 2236 2237 /* Print destination */ 2238 bprintf(bp, " to"); 2239 print_address(bp, fo, &state, dst_opcodes, nitems(dst_opcodes), 2240 O_IP_DSTPORT, HAVE_DSTIP); 2241 2242justopts: 2243 /* Print the rest of options */ 2244 while (print_opcode(bp, fo, &state, -1)) 2245 ; 2246end: 2247 /* Print comment at the end */ 2248 cmd = print_opcode(bp, fo, &state, O_NOP); 2249 if (co->comment_only != 0 && cmd == NULL) 2250 bprintf(bp, " // ..."); 2251 bprintf(bp, "\n"); 2252 free_show_state(&state); 2253} 2254 2255static void 2256show_dyn_state(struct cmdline_opts *co, struct format_opts *fo, 2257 struct buf_pr *bp, ipfw_dyn_rule *d) 2258{ 2259 struct protoent *pe; 2260 struct in_addr a; 2261 uint16_t rulenum; 2262 char buf[INET6_ADDRSTRLEN]; 2263 2264 if (d->expire == 0 && d->dyn_type != O_LIMIT_PARENT) 2265 return; 2266 2267 bcopy(&d->rule, &rulenum, sizeof(rulenum)); 2268 bprintf(bp, "%05d", rulenum); 2269 if (fo->pcwidth > 0 || fo->bcwidth > 0) { 2270 bprintf(bp, " "); 2271 pr_u64(bp, &d->pcnt, fo->pcwidth); 2272 pr_u64(bp, &d->bcnt, fo->bcwidth); 2273 bprintf(bp, "(%ds)", d->expire); 2274 } 2275 switch (d->dyn_type) { 2276 case O_LIMIT_PARENT: 2277 bprintf(bp, " PARENT %d", d->count); 2278 break; 2279 case O_LIMIT: 2280 bprintf(bp, " LIMIT"); 2281 break; 2282 case O_KEEP_STATE: /* bidir, no mask */ 2283 bprintf(bp, " STATE"); 2284 break; 2285 } 2286 2287 if ((pe = getprotobynumber(d->id.proto)) != NULL) 2288 bprintf(bp, " %s", pe->p_name); 2289 else 2290 bprintf(bp, " proto %u", d->id.proto); 2291 2292 if (d->id.addr_type == 4) { 2293 a.s_addr = htonl(d->id.src_ip); 2294 bprintf(bp, " %s %d", inet_ntoa(a), d->id.src_port); 2295 2296 a.s_addr = htonl(d->id.dst_ip); 2297 bprintf(bp, " <-> %s %d", inet_ntoa(a), d->id.dst_port); 2298 } else if (d->id.addr_type == 6) { 2299 bprintf(bp, " %s %d", inet_ntop(AF_INET6, &d->id.src_ip6, buf, 2300 sizeof(buf)), d->id.src_port); 2301 bprintf(bp, " <-> %s %d", inet_ntop(AF_INET6, &d->id.dst_ip6, 2302 buf, sizeof(buf)), d->id.dst_port); 2303 } else 2304 bprintf(bp, " UNKNOWN <-> UNKNOWN"); 2305 if (d->kidx != 0) 2306 bprintf(bp, " :%s", object_search_ctlv(fo->tstate, 2307 d->kidx, IPFW_TLV_STATE_NAME)); 2308 2309#define BOTH_SYN (TH_SYN | (TH_SYN << 8)) 2310#define BOTH_FIN (TH_FIN | (TH_FIN << 8)) 2311 if (co->verbose) { 2312 bprintf(bp, " state 0x%08x%s", d->state, 2313 d->state ? " ": ","); 2314 if (d->state & IPFW_DYN_ORPHANED) 2315 bprintf(bp, "ORPHANED,"); 2316 if ((d->state & BOTH_SYN) == BOTH_SYN) 2317 bprintf(bp, "BOTH_SYN,"); 2318 else { 2319 if (d->state & TH_SYN) 2320 bprintf(bp, "F_SYN,"); 2321 if (d->state & (TH_SYN << 8)) 2322 bprintf(bp, "R_SYN,"); 2323 } 2324 if ((d->state & BOTH_FIN) == BOTH_FIN) 2325 bprintf(bp, "BOTH_FIN,"); 2326 else { 2327 if (d->state & TH_FIN) 2328 bprintf(bp, "F_FIN,"); 2329 if (d->state & (TH_FIN << 8)) 2330 bprintf(bp, "R_FIN,"); 2331 } 2332 bprintf(bp, " f_ack 0x%x, r_ack 0x%x", d->ack_fwd, 2333 d->ack_rev); 2334 } 2335} 2336 2337static int 2338do_range_cmd(int cmd, ipfw_range_tlv *rt) 2339{ 2340 ipfw_range_header rh; 2341 size_t sz; 2342 2343 memset(&rh, 0, sizeof(rh)); 2344 memcpy(&rh.range, rt, sizeof(*rt)); 2345 rh.range.head.length = sizeof(*rt); 2346 rh.range.head.type = IPFW_TLV_RANGE; 2347 sz = sizeof(rh); 2348 2349 if (do_get3(cmd, &rh.opheader, &sz) != 0) 2350 return (-1); 2351 /* Save number of matched objects */ 2352 rt->new_set = rh.range.new_set; 2353 return (0); 2354} 2355 2356/* 2357 * This one handles all set-related commands 2358 * ipfw set { show | enable | disable } 2359 * ipfw set swap X Y 2360 * ipfw set move X to Y 2361 * ipfw set move rule X to Y 2362 */ 2363void 2364ipfw_sets_handler(char *av[]) 2365{ 2366 ipfw_range_tlv rt; 2367 char *msg; 2368 size_t size; 2369 uint32_t masks[2]; 2370 int i; 2371 uint16_t rulenum; 2372 uint8_t cmd; 2373 2374 av++; 2375 memset(&rt, 0, sizeof(rt)); 2376 2377 if (av[0] == NULL) 2378 errx(EX_USAGE, "set needs command"); 2379 if (_substrcmp(*av, "show") == 0) { 2380 struct format_opts fo; 2381 ipfw_cfg_lheader *cfg; 2382 2383 memset(&fo, 0, sizeof(fo)); 2384 if (ipfw_get_config(&co, &fo, &cfg, &size) != 0) 2385 err(EX_OSERR, "requesting config failed"); 2386 2387 for (i = 0, msg = "disable"; i < RESVD_SET; i++) 2388 if ((cfg->set_mask & (1<<i)) == 0) { 2389 printf("%s %d", msg, i); 2390 msg = ""; 2391 } 2392 msg = (cfg->set_mask != (uint32_t)-1) ? " enable" : "enable"; 2393 for (i = 0; i < RESVD_SET; i++) 2394 if ((cfg->set_mask & (1<<i)) != 0) { 2395 printf("%s %d", msg, i); 2396 msg = ""; 2397 } 2398 printf("\n"); 2399 free(cfg); 2400 } else if (_substrcmp(*av, "swap") == 0) { 2401 av++; 2402 if ( av[0] == NULL || av[1] == NULL ) 2403 errx(EX_USAGE, "set swap needs 2 set numbers\n"); 2404 rt.set = atoi(av[0]); 2405 rt.new_set = atoi(av[1]); 2406 if (!isdigit(*(av[0])) || rt.set > RESVD_SET) 2407 errx(EX_DATAERR, "invalid set number %s\n", av[0]); 2408 if (!isdigit(*(av[1])) || rt.new_set > RESVD_SET) 2409 errx(EX_DATAERR, "invalid set number %s\n", av[1]); 2410 i = do_range_cmd(IP_FW_SET_SWAP, &rt); 2411 } else if (_substrcmp(*av, "move") == 0) { 2412 av++; 2413 if (av[0] && _substrcmp(*av, "rule") == 0) { 2414 rt.flags = IPFW_RCFLAG_RANGE; /* move rules to new set */ 2415 cmd = IP_FW_XMOVE; 2416 av++; 2417 } else 2418 cmd = IP_FW_SET_MOVE; /* Move set to new one */ 2419 if (av[0] == NULL || av[1] == NULL || av[2] == NULL || 2420 av[3] != NULL || _substrcmp(av[1], "to") != 0) 2421 errx(EX_USAGE, "syntax: set move [rule] X to Y\n"); 2422 rulenum = atoi(av[0]); 2423 rt.new_set = atoi(av[2]); 2424 if (cmd == IP_FW_XMOVE) { 2425 rt.start_rule = rulenum; 2426 rt.end_rule = rulenum; 2427 } else 2428 rt.set = rulenum; 2429 rt.new_set = atoi(av[2]); 2430 if (!isdigit(*(av[0])) || (cmd == 3 && rt.set > RESVD_SET) || 2431 (cmd == 2 && rt.start_rule == IPFW_DEFAULT_RULE) ) 2432 errx(EX_DATAERR, "invalid source number %s\n", av[0]); 2433 if (!isdigit(*(av[2])) || rt.new_set > RESVD_SET) 2434 errx(EX_DATAERR, "invalid dest. set %s\n", av[1]); 2435 i = do_range_cmd(cmd, &rt); 2436 if (i < 0) 2437 err(EX_OSERR, "failed to move %s", 2438 cmd == IP_FW_SET_MOVE ? "set": "rule"); 2439 } else if (_substrcmp(*av, "disable") == 0 || 2440 _substrcmp(*av, "enable") == 0 ) { 2441 int which = _substrcmp(*av, "enable") == 0 ? 1 : 0; 2442 2443 av++; 2444 masks[0] = masks[1] = 0; 2445 2446 while (av[0]) { 2447 if (isdigit(**av)) { 2448 i = atoi(*av); 2449 if (i < 0 || i > RESVD_SET) 2450 errx(EX_DATAERR, 2451 "invalid set number %d\n", i); 2452 masks[which] |= (1<<i); 2453 } else if (_substrcmp(*av, "disable") == 0) 2454 which = 0; 2455 else if (_substrcmp(*av, "enable") == 0) 2456 which = 1; 2457 else 2458 errx(EX_DATAERR, 2459 "invalid set command %s\n", *av); 2460 av++; 2461 } 2462 if ( (masks[0] & masks[1]) != 0 ) 2463 errx(EX_DATAERR, 2464 "cannot enable and disable the same set\n"); 2465 2466 rt.set = masks[0]; 2467 rt.new_set = masks[1]; 2468 i = do_range_cmd(IP_FW_SET_ENABLE, &rt); 2469 if (i) 2470 warn("set enable/disable: setsockopt(IP_FW_SET_ENABLE)"); 2471 } else 2472 errx(EX_USAGE, "invalid set command %s\n", *av); 2473} 2474 2475void 2476ipfw_sysctl_handler(char *av[], int which) 2477{ 2478 av++; 2479 2480 if (av[0] == NULL) { 2481 warnx("missing keyword to enable/disable\n"); 2482 } else if (_substrcmp(*av, "firewall") == 0) { 2483 sysctlbyname("net.inet.ip.fw.enable", NULL, 0, 2484 &which, sizeof(which)); 2485 sysctlbyname("net.inet6.ip6.fw.enable", NULL, 0, 2486 &which, sizeof(which)); 2487 } else if (_substrcmp(*av, "one_pass") == 0) { 2488 sysctlbyname("net.inet.ip.fw.one_pass", NULL, 0, 2489 &which, sizeof(which)); 2490 } else if (_substrcmp(*av, "debug") == 0) { 2491 sysctlbyname("net.inet.ip.fw.debug", NULL, 0, 2492 &which, sizeof(which)); 2493 } else if (_substrcmp(*av, "verbose") == 0) { 2494 sysctlbyname("net.inet.ip.fw.verbose", NULL, 0, 2495 &which, sizeof(which)); 2496 } else if (_substrcmp(*av, "dyn_keepalive") == 0) { 2497 sysctlbyname("net.inet.ip.fw.dyn_keepalive", NULL, 0, 2498 &which, sizeof(which)); 2499#ifndef NO_ALTQ 2500 } else if (_substrcmp(*av, "altq") == 0) { 2501 altq_set_enabled(which); 2502#endif 2503 } else { 2504 warnx("unrecognize enable/disable keyword: %s\n", *av); 2505 } 2506} 2507 2508typedef void state_cb(struct cmdline_opts *co, struct format_opts *fo, 2509 void *arg, void *state); 2510 2511static void 2512prepare_format_dyn(struct cmdline_opts *co, struct format_opts *fo, 2513 void *arg, void *_state) 2514{ 2515 ipfw_dyn_rule *d; 2516 int width; 2517 uint8_t set; 2518 2519 d = (ipfw_dyn_rule *)_state; 2520 /* Count _ALL_ states */ 2521 fo->dcnt++; 2522 2523 if (fo->show_counters == 0) 2524 return; 2525 2526 if (co->use_set) { 2527 /* skip states from another set */ 2528 bcopy((char *)&d->rule + sizeof(uint16_t), &set, 2529 sizeof(uint8_t)); 2530 if (set != co->use_set - 1) 2531 return; 2532 } 2533 2534 width = pr_u64(NULL, &d->pcnt, 0); 2535 if (width > fo->pcwidth) 2536 fo->pcwidth = width; 2537 2538 width = pr_u64(NULL, &d->bcnt, 0); 2539 if (width > fo->bcwidth) 2540 fo->bcwidth = width; 2541} 2542 2543static int 2544foreach_state(struct cmdline_opts *co, struct format_opts *fo, 2545 caddr_t base, size_t sz, state_cb dyn_bc, void *dyn_arg) 2546{ 2547 int ttype; 2548 state_cb *fptr; 2549 void *farg; 2550 ipfw_obj_tlv *tlv; 2551 ipfw_obj_ctlv *ctlv; 2552 2553 fptr = NULL; 2554 ttype = 0; 2555 2556 while (sz > 0) { 2557 ctlv = (ipfw_obj_ctlv *)base; 2558 switch (ctlv->head.type) { 2559 case IPFW_TLV_DYNSTATE_LIST: 2560 base += sizeof(*ctlv); 2561 sz -= sizeof(*ctlv); 2562 ttype = IPFW_TLV_DYN_ENT; 2563 fptr = dyn_bc; 2564 farg = dyn_arg; 2565 break; 2566 default: 2567 return (sz); 2568 } 2569 2570 while (sz > 0) { 2571 tlv = (ipfw_obj_tlv *)base; 2572 if (tlv->type != ttype) 2573 break; 2574 2575 fptr(co, fo, farg, tlv + 1); 2576 sz -= tlv->length; 2577 base += tlv->length; 2578 } 2579 } 2580 2581 return (sz); 2582} 2583 2584static void 2585prepare_format_opts(struct cmdline_opts *co, struct format_opts *fo, 2586 ipfw_obj_tlv *rtlv, int rcnt, caddr_t dynbase, size_t dynsz) 2587{ 2588 int bcwidth, pcwidth, width; 2589 int n; 2590 struct ip_fw_bcounter *cntr; 2591 struct ip_fw_rule *r; 2592 2593 bcwidth = 0; 2594 pcwidth = 0; 2595 if (fo->show_counters != 0) { 2596 for (n = 0; n < rcnt; n++, 2597 rtlv = (ipfw_obj_tlv *)((caddr_t)rtlv + rtlv->length)) { 2598 cntr = (struct ip_fw_bcounter *)(rtlv + 1); 2599 r = (struct ip_fw_rule *)((caddr_t)cntr + cntr->size); 2600 /* skip rules from another set */ 2601 if (co->use_set && r->set != co->use_set - 1) 2602 continue; 2603 2604 /* packet counter */ 2605 width = pr_u64(NULL, &cntr->pcnt, 0); 2606 if (width > pcwidth) 2607 pcwidth = width; 2608 2609 /* byte counter */ 2610 width = pr_u64(NULL, &cntr->bcnt, 0); 2611 if (width > bcwidth) 2612 bcwidth = width; 2613 } 2614 } 2615 fo->bcwidth = bcwidth; 2616 fo->pcwidth = pcwidth; 2617 2618 fo->dcnt = 0; 2619 if (co->do_dynamic && dynsz > 0) 2620 foreach_state(co, fo, dynbase, dynsz, prepare_format_dyn, NULL); 2621} 2622 2623static int 2624list_static_range(struct cmdline_opts *co, struct format_opts *fo, 2625 struct buf_pr *bp, ipfw_obj_tlv *rtlv, int rcnt) 2626{ 2627 int n, seen; 2628 struct ip_fw_rule *r; 2629 struct ip_fw_bcounter *cntr; 2630 int c = 0; 2631 2632 for (n = seen = 0; n < rcnt; n++, 2633 rtlv = (ipfw_obj_tlv *)((caddr_t)rtlv + rtlv->length)) { 2634 2635 if ((fo->show_counters | fo->show_time) != 0) { 2636 cntr = (struct ip_fw_bcounter *)(rtlv + 1); 2637 r = (struct ip_fw_rule *)((caddr_t)cntr + cntr->size); 2638 } else { 2639 cntr = NULL; 2640 r = (struct ip_fw_rule *)(rtlv + 1); 2641 } 2642 if (r->rulenum > fo->last) 2643 break; 2644 if (co->use_set && r->set != co->use_set - 1) 2645 continue; 2646 if (r->rulenum >= fo->first && r->rulenum <= fo->last) { 2647 show_static_rule(co, fo, bp, r, cntr); 2648 printf("%s", bp->buf); 2649 c += rtlv->length; 2650 bp_flush(bp); 2651 seen++; 2652 } 2653 } 2654 2655 return (seen); 2656} 2657 2658static void 2659list_dyn_state(struct cmdline_opts *co, struct format_opts *fo, 2660 void *_arg, void *_state) 2661{ 2662 uint16_t rulenum; 2663 uint8_t set; 2664 ipfw_dyn_rule *d; 2665 struct buf_pr *bp; 2666 2667 d = (ipfw_dyn_rule *)_state; 2668 bp = (struct buf_pr *)_arg; 2669 2670 bcopy(&d->rule, &rulenum, sizeof(rulenum)); 2671 if (rulenum > fo->last) 2672 return; 2673 if (co->use_set) { 2674 bcopy((char *)&d->rule + sizeof(uint16_t), 2675 &set, sizeof(uint8_t)); 2676 if (set != co->use_set - 1) 2677 return; 2678 } 2679 if (rulenum >= fo->first) { 2680 show_dyn_state(co, fo, bp, d); 2681 printf("%s\n", bp->buf); 2682 bp_flush(bp); 2683 } 2684} 2685 2686static int 2687list_dyn_range(struct cmdline_opts *co, struct format_opts *fo, 2688 struct buf_pr *bp, caddr_t base, size_t sz) 2689{ 2690 2691 sz = foreach_state(co, fo, base, sz, list_dyn_state, bp); 2692 return (sz); 2693} 2694 2695void 2696ipfw_list(int ac, char *av[], int show_counters) 2697{ 2698 ipfw_cfg_lheader *cfg; 2699 struct format_opts sfo; 2700 size_t sz; 2701 int error; 2702 int lac; 2703 char **lav; 2704 uint32_t rnum; 2705 char *endptr; 2706 2707 if (co.test_only) { 2708 fprintf(stderr, "Testing only, list disabled\n"); 2709 return; 2710 } 2711 if (co.do_pipe) { 2712 dummynet_list(ac, av, show_counters); 2713 return; 2714 } 2715 2716 ac--; 2717 av++; 2718 memset(&sfo, 0, sizeof(sfo)); 2719 2720 /* Determine rule range to request */ 2721 if (ac > 0) { 2722 for (lac = ac, lav = av; lac != 0; lac--) { 2723 rnum = strtoul(*lav++, &endptr, 10); 2724 if (sfo.first == 0 || rnum < sfo.first) 2725 sfo.first = rnum; 2726 2727 if (*endptr == '-') 2728 rnum = strtoul(endptr + 1, &endptr, 10); 2729 if (sfo.last == 0 || rnum > sfo.last) 2730 sfo.last = rnum; 2731 } 2732 } 2733 2734 /* get configuraion from kernel */ 2735 cfg = NULL; 2736 sfo.show_counters = show_counters; 2737 sfo.show_time = co.do_time; 2738 if (co.do_dynamic != 2) 2739 sfo.flags |= IPFW_CFG_GET_STATIC; 2740 if (co.do_dynamic != 0) 2741 sfo.flags |= IPFW_CFG_GET_STATES; 2742 if ((sfo.show_counters | sfo.show_time) != 0) 2743 sfo.flags |= IPFW_CFG_GET_COUNTERS; 2744 if (ipfw_get_config(&co, &sfo, &cfg, &sz) != 0) 2745 err(EX_OSERR, "retrieving config failed"); 2746 2747 error = ipfw_show_config(&co, &sfo, cfg, sz, ac, av); 2748 2749 free(cfg); 2750 2751 if (error != EX_OK) 2752 exit(error); 2753} 2754 2755static int 2756ipfw_show_config(struct cmdline_opts *co, struct format_opts *fo, 2757 ipfw_cfg_lheader *cfg, size_t sz, int ac, char *av[]) 2758{ 2759 caddr_t dynbase; 2760 size_t dynsz; 2761 int rcnt; 2762 int exitval = EX_OK; 2763 int lac; 2764 char **lav; 2765 char *endptr; 2766 size_t readsz; 2767 struct buf_pr bp; 2768 ipfw_obj_ctlv *ctlv, *tstate; 2769 ipfw_obj_tlv *rbase; 2770 2771 /* 2772 * Handle tablenames TLV first, if any 2773 */ 2774 tstate = NULL; 2775 rbase = NULL; 2776 dynbase = NULL; 2777 dynsz = 0; 2778 readsz = sizeof(*cfg); 2779 rcnt = 0; 2780 2781 fo->set_mask = cfg->set_mask; 2782 2783 ctlv = (ipfw_obj_ctlv *)(cfg + 1); 2784 if (ctlv->head.type == IPFW_TLV_TBLNAME_LIST) { 2785 object_sort_ctlv(ctlv); 2786 fo->tstate = ctlv; 2787 readsz += ctlv->head.length; 2788 ctlv = (ipfw_obj_ctlv *)((caddr_t)ctlv + ctlv->head.length); 2789 } 2790 2791 if (cfg->flags & IPFW_CFG_GET_STATIC) { 2792 /* We've requested static rules */ 2793 if (ctlv->head.type == IPFW_TLV_RULE_LIST) { 2794 rbase = (ipfw_obj_tlv *)(ctlv + 1); 2795 rcnt = ctlv->count; 2796 readsz += ctlv->head.length; 2797 ctlv = (ipfw_obj_ctlv *)((caddr_t)ctlv + 2798 ctlv->head.length); 2799 } 2800 } 2801 2802 if ((cfg->flags & IPFW_CFG_GET_STATES) && (readsz != sz)) { 2803 /* We may have some dynamic states */ 2804 dynsz = sz - readsz; 2805 /* Skip empty header */ 2806 if (dynsz != sizeof(ipfw_obj_ctlv)) 2807 dynbase = (caddr_t)ctlv; 2808 else 2809 dynsz = 0; 2810 } 2811 2812 prepare_format_opts(co, fo, rbase, rcnt, dynbase, dynsz); 2813 bp_alloc(&bp, 4096); 2814 2815 /* if no rule numbers were specified, list all rules */ 2816 if (ac == 0) { 2817 fo->first = 0; 2818 fo->last = IPFW_DEFAULT_RULE; 2819 if (cfg->flags & IPFW_CFG_GET_STATIC) 2820 list_static_range(co, fo, &bp, rbase, rcnt); 2821 2822 if (co->do_dynamic && dynsz > 0) { 2823 printf("## Dynamic rules (%d %zu):\n", fo->dcnt, 2824 dynsz); 2825 list_dyn_range(co, fo, &bp, dynbase, dynsz); 2826 } 2827 2828 bp_free(&bp); 2829 return (EX_OK); 2830 } 2831 2832 /* display specific rules requested on command line */ 2833 for (lac = ac, lav = av; lac != 0; lac--) { 2834 /* convert command line rule # */ 2835 fo->last = fo->first = strtoul(*lav++, &endptr, 10); 2836 if (*endptr == '-') 2837 fo->last = strtoul(endptr + 1, &endptr, 10); 2838 if (*endptr) { 2839 exitval = EX_USAGE; 2840 warnx("invalid rule number: %s", *(lav - 1)); 2841 continue; 2842 } 2843 2844 if ((cfg->flags & IPFW_CFG_GET_STATIC) == 0) 2845 continue; 2846 2847 if (list_static_range(co, fo, &bp, rbase, rcnt) == 0) { 2848 /* give precedence to other error(s) */ 2849 if (exitval == EX_OK) 2850 exitval = EX_UNAVAILABLE; 2851 if (fo->first == fo->last) 2852 warnx("rule %u does not exist", fo->first); 2853 else 2854 warnx("no rules in range %u-%u", 2855 fo->first, fo->last); 2856 } 2857 } 2858 2859 if (co->do_dynamic && dynsz > 0) { 2860 printf("## Dynamic rules:\n"); 2861 for (lac = ac, lav = av; lac != 0; lac--) { 2862 fo->last = fo->first = strtoul(*lav++, &endptr, 10); 2863 if (*endptr == '-') 2864 fo->last = strtoul(endptr+1, &endptr, 10); 2865 if (*endptr) 2866 /* already warned */ 2867 continue; 2868 list_dyn_range(co, fo, &bp, dynbase, dynsz); 2869 } 2870 } 2871 2872 bp_free(&bp); 2873 return (exitval); 2874} 2875 2876 2877/* 2878 * Retrieves current ipfw configuration of given type 2879 * and stores its pointer to @pcfg. 2880 * 2881 * Caller is responsible for freeing @pcfg. 2882 * 2883 * Returns 0 on success. 2884 */ 2885 2886static int 2887ipfw_get_config(struct cmdline_opts *co, struct format_opts *fo, 2888 ipfw_cfg_lheader **pcfg, size_t *psize) 2889{ 2890 ipfw_cfg_lheader *cfg; 2891 size_t sz; 2892 int i; 2893 2894 2895 if (co->test_only != 0) { 2896 fprintf(stderr, "Testing only, list disabled\n"); 2897 return (0); 2898 } 2899 2900 /* Start with some data size */ 2901 sz = 4096; 2902 cfg = NULL; 2903 2904 for (i = 0; i < 16; i++) { 2905 if (cfg != NULL) 2906 free(cfg); 2907 if ((cfg = calloc(1, sz)) == NULL) 2908 return (ENOMEM); 2909 2910 cfg->flags = fo->flags; 2911 cfg->start_rule = fo->first; 2912 cfg->end_rule = fo->last; 2913 2914 if (do_get3(IP_FW_XGET, &cfg->opheader, &sz) != 0) { 2915 if (errno != ENOMEM) { 2916 free(cfg); 2917 return (errno); 2918 } 2919 2920 /* Buffer size is not enough. Try to increase */ 2921 sz = sz * 2; 2922 if (sz < cfg->size) 2923 sz = cfg->size; 2924 continue; 2925 } 2926 2927 *pcfg = cfg; 2928 *psize = sz; 2929 return (0); 2930 } 2931 2932 free(cfg); 2933 return (ENOMEM); 2934} 2935 2936static int 2937lookup_host (char *host, struct in_addr *ipaddr) 2938{ 2939 struct hostent *he; 2940 2941 if (!inet_aton(host, ipaddr)) { 2942 if ((he = gethostbyname(host)) == NULL) 2943 return(-1); 2944 *ipaddr = *(struct in_addr *)he->h_addr_list[0]; 2945 } 2946 return(0); 2947} 2948 2949struct tidx { 2950 ipfw_obj_ntlv *idx; 2951 uint32_t count; 2952 uint32_t size; 2953 uint16_t counter; 2954 uint8_t set; 2955}; 2956 2957int 2958ipfw_check_object_name(const char *name) 2959{ 2960 int c, i, l; 2961 2962 /* 2963 * Check that name is null-terminated and contains 2964 * valid symbols only. Valid mask is: 2965 * [a-zA-Z0-9\-_\.]{1,63} 2966 */ 2967 l = strlen(name); 2968 if (l == 0 || l >= 64) 2969 return (EINVAL); 2970 for (i = 0; i < l; i++) { 2971 c = name[i]; 2972 if (isalpha(c) || isdigit(c) || c == '_' || 2973 c == '-' || c == '.') 2974 continue; 2975 return (EINVAL); 2976 } 2977 return (0); 2978} 2979 2980static char *default_state_name = "default"; 2981static int 2982state_check_name(const char *name) 2983{ 2984 2985 if (ipfw_check_object_name(name) != 0) 2986 return (EINVAL); 2987 if (strcmp(name, "any") == 0) 2988 return (EINVAL); 2989 return (0); 2990} 2991 2992static int 2993eaction_check_name(const char *name) 2994{ 2995 2996 if (ipfw_check_object_name(name) != 0) 2997 return (EINVAL); 2998 /* Restrict some 'special' names */ 2999 if (match_token(rule_actions, name) != -1 && 3000 match_token(rule_action_params, name) != -1) 3001 return (EINVAL); 3002 return (0); 3003} 3004 3005static uint16_t 3006pack_object(struct tidx *tstate, char *name, int otype) 3007{ 3008 int i; 3009 ipfw_obj_ntlv *ntlv; 3010 3011 for (i = 0; i < tstate->count; i++) { 3012 if (strcmp(tstate->idx[i].name, name) != 0) 3013 continue; 3014 if (tstate->idx[i].set != tstate->set) 3015 continue; 3016 if (tstate->idx[i].head.type != otype) 3017 continue; 3018 3019 return (tstate->idx[i].idx); 3020 } 3021 3022 if (tstate->count + 1 > tstate->size) { 3023 tstate->size += 4; 3024 tstate->idx = realloc(tstate->idx, tstate->size * 3025 sizeof(ipfw_obj_ntlv)); 3026 if (tstate->idx == NULL) 3027 return (0); 3028 } 3029 3030 ntlv = &tstate->idx[i]; 3031 memset(ntlv, 0, sizeof(ipfw_obj_ntlv)); 3032 strlcpy(ntlv->name, name, sizeof(ntlv->name)); 3033 ntlv->head.type = otype; 3034 ntlv->head.length = sizeof(ipfw_obj_ntlv); 3035 ntlv->set = tstate->set; 3036 ntlv->idx = ++tstate->counter; 3037 tstate->count++; 3038 3039 return (ntlv->idx); 3040} 3041 3042static uint16_t 3043pack_table(struct tidx *tstate, char *name) 3044{ 3045 3046 if (table_check_name(name) != 0) 3047 return (0); 3048 3049 return (pack_object(tstate, name, IPFW_TLV_TBL_NAME)); 3050} 3051 3052void 3053fill_table(struct _ipfw_insn *cmd, char *av, uint8_t opcode, 3054 struct tidx *tstate) 3055{ 3056 uint32_t *d = ((ipfw_insn_u32 *)cmd)->d; 3057 uint16_t uidx; 3058 char *p; 3059 3060 if ((p = strchr(av + 6, ')')) == NULL) 3061 errx(EX_DATAERR, "forgotten parenthesis: '%s'", av); 3062 *p = '\0'; 3063 p = strchr(av + 6, ','); 3064 if (p) 3065 *p++ = '\0'; 3066 3067 if ((uidx = pack_table(tstate, av + 6)) == 0) 3068 errx(EX_DATAERR, "Invalid table name: %s", av + 6); 3069 3070 cmd->opcode = opcode; 3071 cmd->arg1 = uidx; 3072 if (p) { 3073 cmd->len |= F_INSN_SIZE(ipfw_insn_u32); 3074 d[0] = strtoul(p, NULL, 0); 3075 } else 3076 cmd->len |= F_INSN_SIZE(ipfw_insn); 3077} 3078 3079 3080/* 3081 * fills the addr and mask fields in the instruction as appropriate from av. 3082 * Update length as appropriate. 3083 * The following formats are allowed: 3084 * me returns O_IP_*_ME 3085 * 1.2.3.4 single IP address 3086 * 1.2.3.4:5.6.7.8 address:mask 3087 * 1.2.3.4/24 address/mask 3088 * 1.2.3.4/26{1,6,5,4,23} set of addresses in a subnet 3089 * We can have multiple comma-separated address/mask entries. 3090 */ 3091static void 3092fill_ip(ipfw_insn_ip *cmd, char *av, int cblen, struct tidx *tstate) 3093{ 3094 int len = 0; 3095 uint32_t *d = ((ipfw_insn_u32 *)cmd)->d; 3096 3097 cmd->o.len &= ~F_LEN_MASK; /* zero len */ 3098 3099 if (_substrcmp(av, "any") == 0) 3100 return; 3101 3102 if (_substrcmp(av, "me") == 0) { 3103 cmd->o.len |= F_INSN_SIZE(ipfw_insn); 3104 return; 3105 } 3106 3107 if (strncmp(av, "table(", 6) == 0) { 3108 fill_table(&cmd->o, av, O_IP_DST_LOOKUP, tstate); 3109 return; 3110 } 3111 3112 while (av) { 3113 /* 3114 * After the address we can have '/' or ':' indicating a mask, 3115 * ',' indicating another address follows, '{' indicating a 3116 * set of addresses of unspecified size. 3117 */ 3118 char *t = NULL, *p = strpbrk(av, "/:,{"); 3119 int masklen; 3120 char md, nd = '\0'; 3121 3122 CHECK_LENGTH(cblen, F_INSN_SIZE(ipfw_insn) + 2 + len); 3123 3124 if (p) { 3125 md = *p; 3126 *p++ = '\0'; 3127 if ((t = strpbrk(p, ",{")) != NULL) { 3128 nd = *t; 3129 *t = '\0'; 3130 } 3131 } else 3132 md = '\0'; 3133 3134 if (lookup_host(av, (struct in_addr *)&d[0]) != 0) 3135 errx(EX_NOHOST, "hostname ``%s'' unknown", av); 3136 switch (md) { 3137 case ':': 3138 if (!inet_aton(p, (struct in_addr *)&d[1])) 3139 errx(EX_DATAERR, "bad netmask ``%s''", p); 3140 break; 3141 case '/': 3142 masklen = atoi(p); 3143 if (masklen == 0) 3144 d[1] = htonl(0U); /* mask */ 3145 else if (masklen > 32) 3146 errx(EX_DATAERR, "bad width ``%s''", p); 3147 else 3148 d[1] = htonl(~0U << (32 - masklen)); 3149 break; 3150 case '{': /* no mask, assume /24 and put back the '{' */ 3151 d[1] = htonl(~0U << (32 - 24)); 3152 *(--p) = md; 3153 break; 3154 3155 case ',': /* single address plus continuation */ 3156 *(--p) = md; 3157 /* FALLTHROUGH */ 3158 case 0: /* initialization value */ 3159 default: 3160 d[1] = htonl(~0U); /* force /32 */ 3161 break; 3162 } 3163 d[0] &= d[1]; /* mask base address with mask */ 3164 if (t) 3165 *t = nd; 3166 /* find next separator */ 3167 if (p) 3168 p = strpbrk(p, ",{"); 3169 if (p && *p == '{') { 3170 /* 3171 * We have a set of addresses. They are stored as follows: 3172 * arg1 is the set size (powers of 2, 2..256) 3173 * addr is the base address IN HOST FORMAT 3174 * mask.. is an array of arg1 bits (rounded up to 3175 * the next multiple of 32) with bits set 3176 * for each host in the map. 3177 */ 3178 uint32_t *map = (uint32_t *)&cmd->mask; 3179 int low, high; 3180 int i = contigmask((uint8_t *)&(d[1]), 32); 3181 3182 if (len > 0) 3183 errx(EX_DATAERR, "address set cannot be in a list"); 3184 if (i < 24 || i > 31) 3185 errx(EX_DATAERR, "invalid set with mask %d\n", i); 3186 cmd->o.arg1 = 1<<(32-i); /* map length */ 3187 d[0] = ntohl(d[0]); /* base addr in host format */ 3188 cmd->o.opcode = O_IP_DST_SET; /* default */ 3189 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32) + (cmd->o.arg1+31)/32; 3190 for (i = 0; i < (cmd->o.arg1+31)/32 ; i++) 3191 map[i] = 0; /* clear map */ 3192 3193 av = p + 1; 3194 low = d[0] & 0xff; 3195 high = low + cmd->o.arg1 - 1; 3196 /* 3197 * Here, i stores the previous value when we specify a range 3198 * of addresses within a mask, e.g. 45-63. i = -1 means we 3199 * have no previous value. 3200 */ 3201 i = -1; /* previous value in a range */ 3202 while (isdigit(*av)) { 3203 char *s; 3204 int a = strtol(av, &s, 0); 3205 3206 if (s == av) { /* no parameter */ 3207 if (*av != '}') 3208 errx(EX_DATAERR, "set not closed\n"); 3209 if (i != -1) 3210 errx(EX_DATAERR, "incomplete range %d-", i); 3211 break; 3212 } 3213 if (a < low || a > high) 3214 errx(EX_DATAERR, "addr %d out of range [%d-%d]\n", 3215 a, low, high); 3216 a -= low; 3217 if (i == -1) /* no previous in range */ 3218 i = a; 3219 else { /* check that range is valid */ 3220 if (i > a) 3221 errx(EX_DATAERR, "invalid range %d-%d", 3222 i+low, a+low); 3223 if (*s == '-') 3224 errx(EX_DATAERR, "double '-' in range"); 3225 } 3226 for (; i <= a; i++) 3227 map[i/32] |= 1<<(i & 31); 3228 i = -1; 3229 if (*s == '-') 3230 i = a; 3231 else if (*s == '}') 3232 break; 3233 av = s+1; 3234 } 3235 return; 3236 } 3237 av = p; 3238 if (av) /* then *av must be a ',' */ 3239 av++; 3240 3241 /* Check this entry */ 3242 if (d[1] == 0) { /* "any", specified as x.x.x.x/0 */ 3243 /* 3244 * 'any' turns the entire list into a NOP. 3245 * 'not any' never matches, so it is removed from the 3246 * list unless it is the only item, in which case we 3247 * report an error. 3248 */ 3249 if (cmd->o.len & F_NOT) { /* "not any" never matches */ 3250 if (av == NULL && len == 0) /* only this entry */ 3251 errx(EX_DATAERR, "not any never matches"); 3252 } 3253 /* else do nothing and skip this entry */ 3254 return; 3255 } 3256 /* A single IP can be stored in an optimized format */ 3257 if (d[1] == (uint32_t)~0 && av == NULL && len == 0) { 3258 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32); 3259 return; 3260 } 3261 len += 2; /* two words... */ 3262 d += 2; 3263 } /* end while */ 3264 if (len + 1 > F_LEN_MASK) 3265 errx(EX_DATAERR, "address list too long"); 3266 cmd->o.len |= len+1; 3267} 3268 3269 3270/* n2mask sets n bits of the mask */ 3271void 3272n2mask(struct in6_addr *mask, int n) 3273{ 3274 static int minimask[9] = 3275 { 0x00, 0x80, 0xc0, 0xe0, 0xf0, 0xf8, 0xfc, 0xfe, 0xff }; 3276 u_char *p; 3277 3278 memset(mask, 0, sizeof(struct in6_addr)); 3279 p = (u_char *) mask; 3280 for (; n > 0; p++, n -= 8) { 3281 if (n >= 8) 3282 *p = 0xff; 3283 else 3284 *p = minimask[n]; 3285 } 3286 return; 3287} 3288 3289static void 3290fill_flags_cmd(ipfw_insn *cmd, enum ipfw_opcodes opcode, 3291 struct _s_x *flags, char *p) 3292{ 3293 char *e; 3294 uint32_t set = 0, clear = 0; 3295 3296 if (fill_flags(flags, p, &e, &set, &clear) != 0) 3297 errx(EX_DATAERR, "invalid flag %s", e); 3298 3299 cmd->opcode = opcode; 3300 cmd->len = (cmd->len & (F_NOT | F_OR)) | 1; 3301 cmd->arg1 = (set & 0xff) | ( (clear & 0xff) << 8); 3302} 3303 3304 3305void 3306ipfw_delete(char *av[]) 3307{ 3308 ipfw_range_tlv rt; 3309 char *sep; 3310 int i, j; 3311 int exitval = EX_OK; 3312 int do_set = 0; 3313 3314 av++; 3315 NEED1("missing rule specification"); 3316 if ( *av && _substrcmp(*av, "set") == 0) { 3317 /* Do not allow using the following syntax: 3318 * ipfw set N delete set M 3319 */ 3320 if (co.use_set) 3321 errx(EX_DATAERR, "invalid syntax"); 3322 do_set = 1; /* delete set */ 3323 av++; 3324 } 3325 3326 /* Rule number */ 3327 while (*av && isdigit(**av)) { 3328 i = strtol(*av, &sep, 10); 3329 j = i; 3330 if (*sep== '-') 3331 j = strtol(sep + 1, NULL, 10); 3332 av++; 3333 if (co.do_nat) { 3334 exitval = ipfw_delete_nat(i); 3335 } else if (co.do_pipe) { 3336 exitval = ipfw_delete_pipe(co.do_pipe, i); 3337 } else { 3338 memset(&rt, 0, sizeof(rt)); 3339 if (do_set != 0) { 3340 rt.set = i & 31; 3341 rt.flags = IPFW_RCFLAG_SET; 3342 } else { 3343 rt.start_rule = i & 0xffff; 3344 rt.end_rule = j & 0xffff; 3345 if (rt.start_rule == 0 && rt.end_rule == 0) 3346 rt.flags |= IPFW_RCFLAG_ALL; 3347 else 3348 rt.flags |= IPFW_RCFLAG_RANGE; 3349 if (co.use_set != 0) { 3350 rt.set = co.use_set - 1; 3351 rt.flags |= IPFW_RCFLAG_SET; 3352 } 3353 } 3354 if (co.do_dynamic == 2) 3355 rt.flags |= IPFW_RCFLAG_DYNAMIC; 3356 i = do_range_cmd(IP_FW_XDEL, &rt); 3357 if (i != 0) { 3358 exitval = EX_UNAVAILABLE; 3359 if (co.do_quiet) 3360 continue; 3361 warn("rule %u: setsockopt(IP_FW_XDEL)", 3362 rt.start_rule); 3363 } else if (rt.new_set == 0 && do_set == 0 && 3364 co.do_dynamic != 2) { 3365 exitval = EX_UNAVAILABLE; 3366 if (co.do_quiet) 3367 continue; 3368 if (rt.start_rule != rt.end_rule) 3369 warnx("no rules rules in %u-%u range", 3370 rt.start_rule, rt.end_rule); 3371 else 3372 warnx("rule %u not found", 3373 rt.start_rule); 3374 } 3375 } 3376 } 3377 if (exitval != EX_OK && co.do_force == 0) 3378 exit(exitval); 3379} 3380 3381 3382/* 3383 * fill the interface structure. We do not check the name as we can 3384 * create interfaces dynamically, so checking them at insert time 3385 * makes relatively little sense. 3386 * Interface names containing '*', '?', or '[' are assumed to be shell 3387 * patterns which match interfaces. 3388 */ 3389static void 3390fill_iface(ipfw_insn_if *cmd, char *arg, int cblen, struct tidx *tstate) 3391{ 3392 char *p; 3393 uint16_t uidx; 3394 3395 cmd->name[0] = '\0'; 3396 cmd->o.len |= F_INSN_SIZE(ipfw_insn_if); 3397 3398 CHECK_CMDLEN; 3399 3400 /* Parse the interface or address */ 3401 if (strcmp(arg, "any") == 0) 3402 cmd->o.len = 0; /* effectively ignore this command */ 3403 else if (strncmp(arg, "table(", 6) == 0) { 3404 if ((p = strchr(arg + 6, ')')) == NULL) 3405 errx(EX_DATAERR, "forgotten parenthesis: '%s'", arg); 3406 *p = '\0'; 3407 p = strchr(arg + 6, ','); 3408 if (p) 3409 *p++ = '\0'; 3410 if ((uidx = pack_table(tstate, arg + 6)) == 0) 3411 errx(EX_DATAERR, "Invalid table name: %s", arg + 6); 3412 3413 cmd->name[0] = '\1'; /* Special value indicating table */ 3414 cmd->p.kidx = uidx; 3415 } else if (!isdigit(*arg)) { 3416 strlcpy(cmd->name, arg, sizeof(cmd->name)); 3417 cmd->p.glob = strpbrk(arg, "*?[") != NULL ? 1 : 0; 3418 } else if (!inet_aton(arg, &cmd->p.ip)) 3419 errx(EX_DATAERR, "bad ip address ``%s''", arg); 3420} 3421 3422static void 3423get_mac_addr_mask(const char *p, uint8_t *addr, uint8_t *mask) 3424{ 3425 int i; 3426 size_t l; 3427 char *ap, *ptr, *optr; 3428 struct ether_addr *mac; 3429 const char *macset = "0123456789abcdefABCDEF:"; 3430 3431 if (strcmp(p, "any") == 0) { 3432 for (i = 0; i < ETHER_ADDR_LEN; i++) 3433 addr[i] = mask[i] = 0; 3434 return; 3435 } 3436 3437 optr = ptr = strdup(p); 3438 if ((ap = strsep(&ptr, "&/")) != NULL && *ap != 0) { 3439 l = strlen(ap); 3440 if (strspn(ap, macset) != l || (mac = ether_aton(ap)) == NULL) 3441 errx(EX_DATAERR, "Incorrect MAC address"); 3442 bcopy(mac, addr, ETHER_ADDR_LEN); 3443 } else 3444 errx(EX_DATAERR, "Incorrect MAC address"); 3445 3446 if (ptr != NULL) { /* we have mask? */ 3447 if (p[ptr - optr - 1] == '/') { /* mask len */ 3448 long ml = strtol(ptr, &ap, 10); 3449 if (*ap != 0 || ml > ETHER_ADDR_LEN * 8 || ml < 0) 3450 errx(EX_DATAERR, "Incorrect mask length"); 3451 for (i = 0; ml > 0 && i < ETHER_ADDR_LEN; ml -= 8, i++) 3452 mask[i] = (ml >= 8) ? 0xff: (~0) << (8 - ml); 3453 } else { /* mask */ 3454 l = strlen(ptr); 3455 if (strspn(ptr, macset) != l || 3456 (mac = ether_aton(ptr)) == NULL) 3457 errx(EX_DATAERR, "Incorrect mask"); 3458 bcopy(mac, mask, ETHER_ADDR_LEN); 3459 } 3460 } else { /* default mask: ff:ff:ff:ff:ff:ff */ 3461 for (i = 0; i < ETHER_ADDR_LEN; i++) 3462 mask[i] = 0xff; 3463 } 3464 for (i = 0; i < ETHER_ADDR_LEN; i++) 3465 addr[i] &= mask[i]; 3466 3467 free(optr); 3468} 3469 3470/* 3471 * helper function, updates the pointer to cmd with the length 3472 * of the current command, and also cleans up the first word of 3473 * the new command in case it has been clobbered before. 3474 */ 3475static ipfw_insn * 3476next_cmd(ipfw_insn *cmd, int *len) 3477{ 3478 *len -= F_LEN(cmd); 3479 CHECK_LENGTH(*len, 0); 3480 cmd += F_LEN(cmd); 3481 bzero(cmd, sizeof(*cmd)); 3482 return cmd; 3483} 3484 3485/* 3486 * Takes arguments and copies them into a comment 3487 */ 3488static void 3489fill_comment(ipfw_insn *cmd, char **av, int cblen) 3490{ 3491 int i, l; 3492 char *p = (char *)(cmd + 1); 3493 3494 cmd->opcode = O_NOP; 3495 cmd->len = (cmd->len & (F_NOT | F_OR)); 3496 3497 /* Compute length of comment string. */ 3498 for (i = 0, l = 0; av[i] != NULL; i++) 3499 l += strlen(av[i]) + 1; 3500 if (l == 0) 3501 return; 3502 if (l > 84) 3503 errx(EX_DATAERR, 3504 "comment too long (max 80 chars)"); 3505 l = 1 + (l+3)/4; 3506 cmd->len = (cmd->len & (F_NOT | F_OR)) | l; 3507 CHECK_CMDLEN; 3508 3509 for (i = 0; av[i] != NULL; i++) { 3510 strcpy(p, av[i]); 3511 p += strlen(av[i]); 3512 *p++ = ' '; 3513 } 3514 *(--p) = '\0'; 3515} 3516 3517/* 3518 * A function to fill simple commands of size 1. 3519 * Existing flags are preserved. 3520 */ 3521static void 3522fill_cmd(ipfw_insn *cmd, enum ipfw_opcodes opcode, int flags, uint16_t arg) 3523{ 3524 cmd->opcode = opcode; 3525 cmd->len = ((cmd->len | flags) & (F_NOT | F_OR)) | 1; 3526 cmd->arg1 = arg; 3527} 3528 3529/* 3530 * Fetch and add the MAC address and type, with masks. This generates one or 3531 * two microinstructions, and returns the pointer to the last one. 3532 */ 3533static ipfw_insn * 3534add_mac(ipfw_insn *cmd, char *av[], int cblen) 3535{ 3536 ipfw_insn_mac *mac; 3537 3538 if ( ( av[0] == NULL ) || ( av[1] == NULL ) ) 3539 errx(EX_DATAERR, "MAC dst src"); 3540 3541 cmd->opcode = O_MACADDR2; 3542 cmd->len = (cmd->len & (F_NOT | F_OR)) | F_INSN_SIZE(ipfw_insn_mac); 3543 CHECK_CMDLEN; 3544 3545 mac = (ipfw_insn_mac *)cmd; 3546 get_mac_addr_mask(av[0], mac->addr, mac->mask); /* dst */ 3547 get_mac_addr_mask(av[1], &(mac->addr[ETHER_ADDR_LEN]), 3548 &(mac->mask[ETHER_ADDR_LEN])); /* src */ 3549 return cmd; 3550} 3551 3552static ipfw_insn * 3553add_mactype(ipfw_insn *cmd, char *av, int cblen) 3554{ 3555 if (!av) 3556 errx(EX_DATAERR, "missing MAC type"); 3557 if (strcmp(av, "any") != 0) { /* we have a non-null type */ 3558 fill_newports((ipfw_insn_u16 *)cmd, av, IPPROTO_ETHERTYPE, 3559 cblen); 3560 cmd->opcode = O_MAC_TYPE; 3561 return cmd; 3562 } else 3563 return NULL; 3564} 3565 3566static ipfw_insn * 3567add_proto0(ipfw_insn *cmd, char *av, u_char *protop) 3568{ 3569 struct protoent *pe; 3570 char *ep; 3571 int proto; 3572 3573 proto = strtol(av, &ep, 10); 3574 if (*ep != '\0' || proto <= 0) { 3575 if ((pe = getprotobyname(av)) == NULL) 3576 return NULL; 3577 proto = pe->p_proto; 3578 } 3579 3580 fill_cmd(cmd, O_PROTO, 0, proto); 3581 *protop = proto; 3582 return cmd; 3583} 3584 3585static ipfw_insn * 3586add_proto(ipfw_insn *cmd, char *av, u_char *protop) 3587{ 3588 u_char proto = IPPROTO_IP; 3589 3590 if (_substrcmp(av, "all") == 0 || strcmp(av, "ip") == 0) 3591 ; /* do not set O_IP4 nor O_IP6 */ 3592 else if (strcmp(av, "ip4") == 0) 3593 /* explicit "just IPv4" rule */ 3594 fill_cmd(cmd, O_IP4, 0, 0); 3595 else if (strcmp(av, "ip6") == 0) { 3596 /* explicit "just IPv6" rule */ 3597 proto = IPPROTO_IPV6; 3598 fill_cmd(cmd, O_IP6, 0, 0); 3599 } else 3600 return add_proto0(cmd, av, protop); 3601 3602 *protop = proto; 3603 return cmd; 3604} 3605 3606static ipfw_insn * 3607add_proto_compat(ipfw_insn *cmd, char *av, u_char *protop) 3608{ 3609 u_char proto = IPPROTO_IP; 3610 3611 if (_substrcmp(av, "all") == 0 || strcmp(av, "ip") == 0) 3612 ; /* do not set O_IP4 nor O_IP6 */ 3613 else if (strcmp(av, "ipv4") == 0 || strcmp(av, "ip4") == 0) 3614 /* explicit "just IPv4" rule */ 3615 fill_cmd(cmd, O_IP4, 0, 0); 3616 else if (strcmp(av, "ipv6") == 0 || strcmp(av, "ip6") == 0) { 3617 /* explicit "just IPv6" rule */ 3618 proto = IPPROTO_IPV6; 3619 fill_cmd(cmd, O_IP6, 0, 0); 3620 } else 3621 return add_proto0(cmd, av, protop); 3622 3623 *protop = proto; 3624 return cmd; 3625} 3626 3627static ipfw_insn * 3628add_srcip(ipfw_insn *cmd, char *av, int cblen, struct tidx *tstate) 3629{ 3630 fill_ip((ipfw_insn_ip *)cmd, av, cblen, tstate); 3631 if (cmd->opcode == O_IP_DST_SET) /* set */ 3632 cmd->opcode = O_IP_SRC_SET; 3633 else if (cmd->opcode == O_IP_DST_LOOKUP) /* table */ 3634 cmd->opcode = O_IP_SRC_LOOKUP; 3635 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn)) /* me */ 3636 cmd->opcode = O_IP_SRC_ME; 3637 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_u32)) /* one IP */ 3638 cmd->opcode = O_IP_SRC; 3639 else /* addr/mask */ 3640 cmd->opcode = O_IP_SRC_MASK; 3641 return cmd; 3642} 3643 3644static ipfw_insn * 3645add_dstip(ipfw_insn *cmd, char *av, int cblen, struct tidx *tstate) 3646{ 3647 fill_ip((ipfw_insn_ip *)cmd, av, cblen, tstate); 3648 if (cmd->opcode == O_IP_DST_SET) /* set */ 3649 ; 3650 else if (cmd->opcode == O_IP_DST_LOOKUP) /* table */ 3651 ; 3652 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn)) /* me */ 3653 cmd->opcode = O_IP_DST_ME; 3654 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_u32)) /* one IP */ 3655 cmd->opcode = O_IP_DST; 3656 else /* addr/mask */ 3657 cmd->opcode = O_IP_DST_MASK; 3658 return cmd; 3659} 3660 3661static struct _s_x f_reserved_keywords[] = { 3662 { "altq", TOK_OR }, 3663 { "//", TOK_OR }, 3664 { "diverted", TOK_OR }, 3665 { "dst-port", TOK_OR }, 3666 { "src-port", TOK_OR }, 3667 { "established", TOK_OR }, 3668 { "keep-state", TOK_OR }, 3669 { "frag", TOK_OR }, 3670 { "icmptypes", TOK_OR }, 3671 { "in", TOK_OR }, 3672 { "out", TOK_OR }, 3673 { "ip6", TOK_OR }, 3674 { "any", TOK_OR }, 3675 { "to", TOK_OR }, 3676 { "via", TOK_OR }, 3677 { "{", TOK_OR }, 3678 { NULL, 0 } /* terminator */ 3679}; 3680 3681static ipfw_insn * 3682add_ports(ipfw_insn *cmd, char *av, u_char proto, int opcode, int cblen) 3683{ 3684 3685 if (match_token(f_reserved_keywords, av) != -1) 3686 return (NULL); 3687 3688 if (fill_newports((ipfw_insn_u16 *)cmd, av, proto, cblen)) { 3689 /* XXX todo: check that we have a protocol with ports */ 3690 cmd->opcode = opcode; 3691 return cmd; 3692 } 3693 return NULL; 3694} 3695 3696static ipfw_insn * 3697add_src(ipfw_insn *cmd, char *av, u_char proto, int cblen, struct tidx *tstate) 3698{ 3699 struct in6_addr a; 3700 char *host, *ch, buf[INET6_ADDRSTRLEN]; 3701 ipfw_insn *ret = NULL; 3702 int len; 3703 3704 /* Copy first address in set if needed */ 3705 if ((ch = strpbrk(av, "/,")) != NULL) { 3706 len = ch - av; 3707 strlcpy(buf, av, sizeof(buf)); 3708 if (len < sizeof(buf)) 3709 buf[len] = '\0'; 3710 host = buf; 3711 } else 3712 host = av; 3713 3714 if (proto == IPPROTO_IPV6 || strcmp(av, "me6") == 0 || 3715 inet_pton(AF_INET6, host, &a) == 1) 3716 ret = add_srcip6(cmd, av, cblen, tstate); 3717 /* XXX: should check for IPv4, not !IPv6 */ 3718 if (ret == NULL && (proto == IPPROTO_IP || strcmp(av, "me") == 0 || 3719 inet_pton(AF_INET6, host, &a) != 1)) 3720 ret = add_srcip(cmd, av, cblen, tstate); 3721 if (ret == NULL && strcmp(av, "any") != 0) 3722 ret = cmd; 3723 3724 return ret; 3725} 3726 3727static ipfw_insn * 3728add_dst(ipfw_insn *cmd, char *av, u_char proto, int cblen, struct tidx *tstate) 3729{ 3730 struct in6_addr a; 3731 char *host, *ch, buf[INET6_ADDRSTRLEN]; 3732 ipfw_insn *ret = NULL; 3733 int len; 3734 3735 /* Copy first address in set if needed */ 3736 if ((ch = strpbrk(av, "/,")) != NULL) { 3737 len = ch - av; 3738 strlcpy(buf, av, sizeof(buf)); 3739 if (len < sizeof(buf)) 3740 buf[len] = '\0'; 3741 host = buf; 3742 } else 3743 host = av; 3744 3745 if (proto == IPPROTO_IPV6 || strcmp(av, "me6") == 0 || 3746 inet_pton(AF_INET6, host, &a) == 1) 3747 ret = add_dstip6(cmd, av, cblen, tstate); 3748 /* XXX: should check for IPv4, not !IPv6 */ 3749 if (ret == NULL && (proto == IPPROTO_IP || strcmp(av, "me") == 0 || 3750 inet_pton(AF_INET6, host, &a) != 1)) 3751 ret = add_dstip(cmd, av, cblen, tstate); 3752 if (ret == NULL && strcmp(av, "any") != 0) 3753 ret = cmd; 3754 3755 return ret; 3756} 3757 3758/* 3759 * Parse arguments and assemble the microinstructions which make up a rule. 3760 * Rules are added into the 'rulebuf' and then copied in the correct order 3761 * into the actual rule. 3762 * 3763 * The syntax for a rule starts with the action, followed by 3764 * optional action parameters, and the various match patterns. 3765 * In the assembled microcode, the first opcode must be an O_PROBE_STATE 3766 * (generated if the rule includes a keep-state option), then the 3767 * various match patterns, log/altq actions, and the actual action. 3768 * 3769 */ 3770void 3771compile_rule(char *av[], uint32_t *rbuf, int *rbufsize, struct tidx *tstate) 3772{ 3773 /* 3774 * rules are added into the 'rulebuf' and then copied in 3775 * the correct order into the actual rule. 3776 * Some things that need to go out of order (prob, action etc.) 3777 * go into actbuf[]. 3778 */ 3779 static uint32_t actbuf[255], cmdbuf[255]; 3780 int rblen, ablen, cblen; 3781 3782 ipfw_insn *src, *dst, *cmd, *action, *prev=NULL; 3783 ipfw_insn *first_cmd; /* first match pattern */ 3784 3785 struct ip_fw_rule *rule; 3786 3787 /* 3788 * various flags used to record that we entered some fields. 3789 */ 3790 ipfw_insn *have_state = NULL; /* any state-related option */ 3791 int have_rstate = 0; 3792 ipfw_insn *have_log = NULL, *have_altq = NULL, *have_tag = NULL; 3793 ipfw_insn *have_skipcmd = NULL; 3794 size_t len; 3795 3796 int i; 3797 3798 int open_par = 0; /* open parenthesis ( */ 3799 3800 /* proto is here because it is used to fetch ports */ 3801 u_char proto = IPPROTO_IP; /* default protocol */ 3802 3803 double match_prob = 1; /* match probability, default is always match */ 3804 3805 bzero(actbuf, sizeof(actbuf)); /* actions go here */ 3806 bzero(cmdbuf, sizeof(cmdbuf)); 3807 bzero(rbuf, *rbufsize); 3808 3809 rule = (struct ip_fw_rule *)rbuf; 3810 cmd = (ipfw_insn *)cmdbuf; 3811 action = (ipfw_insn *)actbuf; 3812 3813 rblen = *rbufsize / sizeof(uint32_t); 3814 rblen -= sizeof(struct ip_fw_rule) / sizeof(uint32_t); 3815 ablen = sizeof(actbuf) / sizeof(actbuf[0]); 3816 cblen = sizeof(cmdbuf) / sizeof(cmdbuf[0]); 3817 cblen -= F_INSN_SIZE(ipfw_insn_u32) + 1; 3818 3819#define CHECK_RBUFLEN(len) { CHECK_LENGTH(rblen, len); rblen -= len; } 3820#define CHECK_ACTLEN CHECK_LENGTH(ablen, action->len) 3821 3822 av++; 3823 3824 /* [rule N] -- Rule number optional */ 3825 if (av[0] && isdigit(**av)) { 3826 rule->rulenum = atoi(*av); 3827 av++; 3828 } 3829 3830 /* [set N] -- set number (0..RESVD_SET), optional */ 3831 if (av[0] && av[1] && _substrcmp(*av, "set") == 0) { 3832 int set = strtoul(av[1], NULL, 10); 3833 if (set < 0 || set > RESVD_SET) 3834 errx(EX_DATAERR, "illegal set %s", av[1]); 3835 rule->set = set; 3836 tstate->set = set; 3837 av += 2; 3838 } 3839 3840 /* [prob D] -- match probability, optional */ 3841 if (av[0] && av[1] && _substrcmp(*av, "prob") == 0) { 3842 match_prob = strtod(av[1], NULL); 3843 3844 if (match_prob <= 0 || match_prob > 1) 3845 errx(EX_DATAERR, "illegal match prob. %s", av[1]); 3846 av += 2; 3847 } 3848 3849 /* action -- mandatory */ 3850 NEED1("missing action"); 3851 i = match_token(rule_actions, *av); 3852 av++; 3853 action->len = 1; /* default */ 3854 CHECK_ACTLEN; 3855 switch(i) { 3856 case TOK_CHECKSTATE: 3857 have_state = action; 3858 action->opcode = O_CHECK_STATE; 3859 if (*av == NULL || 3860 match_token(rule_options, *av) == TOK_COMMENT) { 3861 action->arg1 = pack_object(tstate, 3862 default_state_name, IPFW_TLV_STATE_NAME); 3863 break; 3864 } 3865 if (*av[0] == ':') { 3866 if (strcmp(*av + 1, "any") == 0) 3867 action->arg1 = 0; 3868 else if (state_check_name(*av + 1) == 0) 3869 action->arg1 = pack_object(tstate, *av + 1, 3870 IPFW_TLV_STATE_NAME); 3871 else 3872 errx(EX_DATAERR, "Invalid state name %s", 3873 *av); 3874 av++; 3875 break; 3876 } 3877 errx(EX_DATAERR, "Invalid state name %s", *av); 3878 break; 3879 3880 case TOK_ABORT: 3881 action->opcode = O_REJECT; 3882 action->arg1 = ICMP_REJECT_ABORT; 3883 break; 3884 3885 case TOK_ABORT6: 3886 action->opcode = O_UNREACH6; 3887 action->arg1 = ICMP6_UNREACH_ABORT; 3888 break; 3889 3890 case TOK_ACCEPT: 3891 action->opcode = O_ACCEPT; 3892 break; 3893 3894 case TOK_DENY: 3895 action->opcode = O_DENY; 3896 action->arg1 = 0; 3897 break; 3898 3899 case TOK_REJECT: 3900 action->opcode = O_REJECT; 3901 action->arg1 = ICMP_UNREACH_HOST; 3902 break; 3903 3904 case TOK_RESET: 3905 action->opcode = O_REJECT; 3906 action->arg1 = ICMP_REJECT_RST; 3907 break; 3908 3909 case TOK_RESET6: 3910 action->opcode = O_UNREACH6; 3911 action->arg1 = ICMP6_UNREACH_RST; 3912 break; 3913 3914 case TOK_UNREACH: 3915 action->opcode = O_REJECT; 3916 NEED1("missing reject code"); 3917 fill_reject_code(&action->arg1, *av); 3918 av++; 3919 break; 3920 3921 case TOK_UNREACH6: 3922 action->opcode = O_UNREACH6; 3923 NEED1("missing unreach code"); 3924 fill_unreach6_code(&action->arg1, *av); 3925 av++; 3926 break; 3927 3928 case TOK_COUNT: 3929 action->opcode = O_COUNT; 3930 break; 3931 3932 case TOK_NAT: 3933 action->opcode = O_NAT; 3934 action->len = F_INSN_SIZE(ipfw_insn_nat); 3935 CHECK_ACTLEN; 3936 if (*av != NULL && _substrcmp(*av, "global") == 0) { 3937 action->arg1 = IP_FW_NAT44_GLOBAL; 3938 av++; 3939 break; 3940 } else 3941 goto chkarg; 3942 case TOK_QUEUE: 3943 action->opcode = O_QUEUE; 3944 goto chkarg; 3945 case TOK_PIPE: 3946 action->opcode = O_PIPE; 3947 goto chkarg; 3948 case TOK_SKIPTO: 3949 action->opcode = O_SKIPTO; 3950 goto chkarg; 3951 case TOK_NETGRAPH: 3952 action->opcode = O_NETGRAPH; 3953 goto chkarg; 3954 case TOK_NGTEE: 3955 action->opcode = O_NGTEE; 3956 goto chkarg; 3957 case TOK_DIVERT: 3958 action->opcode = O_DIVERT; 3959 goto chkarg; 3960 case TOK_TEE: 3961 action->opcode = O_TEE; 3962 goto chkarg; 3963 case TOK_CALL: 3964 action->opcode = O_CALLRETURN; 3965chkarg: 3966 if (!av[0]) 3967 errx(EX_USAGE, "missing argument for %s", *(av - 1)); 3968 if (isdigit(**av)) { 3969 action->arg1 = strtoul(*av, NULL, 10); 3970 if (action->arg1 <= 0 || action->arg1 >= IP_FW_TABLEARG) 3971 errx(EX_DATAERR, "illegal argument for %s", 3972 *(av - 1)); 3973 } else if (_substrcmp(*av, "tablearg") == 0) { 3974 action->arg1 = IP_FW_TARG; 3975 } else if (i == TOK_DIVERT || i == TOK_TEE) { 3976 struct servent *s; 3977 setservent(1); 3978 s = getservbyname(av[0], "divert"); 3979 if (s != NULL) 3980 action->arg1 = ntohs(s->s_port); 3981 else 3982 errx(EX_DATAERR, "illegal divert/tee port"); 3983 } else 3984 errx(EX_DATAERR, "illegal argument for %s", *(av - 1)); 3985 av++; 3986 break; 3987 3988 case TOK_FORWARD: { 3989 /* 3990 * Locate the address-port separator (':' or ','). 3991 * Could be one of the following: 3992 * hostname:port 3993 * IPv4 a.b.c.d,port 3994 * IPv4 a.b.c.d:port 3995 * IPv6 w:x:y::z,port 3996 * The ':' can only be used with hostname and IPv4 address. 3997 * XXX-BZ Should we also support [w:x:y::z]:port? 3998 */ 3999 struct sockaddr_storage result; 4000 struct addrinfo *res; 4001 char *s, *end; 4002 int family; 4003 u_short port_number; 4004 4005 NEED1("missing forward address[:port]"); 4006 4007 /* 4008 * locate the address-port separator (':' or ',') 4009 */ 4010 s = strchr(*av, ','); 4011 if (s == NULL) { 4012 /* Distinguish between IPv4:port and IPv6 cases. */ 4013 s = strchr(*av, ':'); 4014 if (s && strchr(s+1, ':')) 4015 s = NULL; /* no port */ 4016 } 4017 4018 port_number = 0; 4019 if (s != NULL) { 4020 /* Terminate host portion and set s to start of port. */ 4021 *(s++) = '\0'; 4022 i = strtoport(s, &end, 0 /* base */, 0 /* proto */); 4023 if (s == end) 4024 errx(EX_DATAERR, 4025 "illegal forwarding port ``%s''", s); 4026 port_number = (u_short)i; 4027 } 4028 4029 if (_substrcmp(*av, "tablearg") == 0) { 4030 family = PF_INET; 4031 ((struct sockaddr_in*)&result)->sin_addr.s_addr = 4032 INADDR_ANY; 4033 } else { 4034 /* 4035 * Resolve the host name or address to a family and a 4036 * network representation of the address. 4037 */ 4038 if (getaddrinfo(*av, NULL, NULL, &res)) 4039 errx(EX_DATAERR, NULL); 4040 /* Just use the first host in the answer. */ 4041 family = res->ai_family; 4042 memcpy(&result, res->ai_addr, res->ai_addrlen); 4043 freeaddrinfo(res); 4044 } 4045 4046 if (family == PF_INET) { 4047 ipfw_insn_sa *p = (ipfw_insn_sa *)action; 4048 4049 action->opcode = O_FORWARD_IP; 4050 action->len = F_INSN_SIZE(ipfw_insn_sa); 4051 CHECK_ACTLEN; 4052 4053 /* 4054 * In the kernel we assume AF_INET and use only 4055 * sin_port and sin_addr. Remember to set sin_len as 4056 * the routing code seems to use it too. 4057 */ 4058 p->sa.sin_len = sizeof(struct sockaddr_in); 4059 p->sa.sin_family = AF_INET; 4060 p->sa.sin_port = port_number; 4061 p->sa.sin_addr.s_addr = 4062 ((struct sockaddr_in *)&result)->sin_addr.s_addr; 4063 } else if (family == PF_INET6) { 4064 ipfw_insn_sa6 *p = (ipfw_insn_sa6 *)action; 4065 4066 action->opcode = O_FORWARD_IP6; 4067 action->len = F_INSN_SIZE(ipfw_insn_sa6); 4068 CHECK_ACTLEN; 4069 4070 p->sa.sin6_len = sizeof(struct sockaddr_in6); 4071 p->sa.sin6_family = AF_INET6; 4072 p->sa.sin6_port = port_number; 4073 p->sa.sin6_flowinfo = 0; 4074 p->sa.sin6_scope_id = 4075 ((struct sockaddr_in6 *)&result)->sin6_scope_id; 4076 bcopy(&((struct sockaddr_in6*)&result)->sin6_addr, 4077 &p->sa.sin6_addr, sizeof(p->sa.sin6_addr)); 4078 } else { 4079 errx(EX_DATAERR, "Invalid address family in forward action"); 4080 } 4081 av++; 4082 break; 4083 } 4084 case TOK_COMMENT: 4085 /* pretend it is a 'count' rule followed by the comment */ 4086 action->opcode = O_COUNT; 4087 av--; /* go back... */ 4088 break; 4089 4090 case TOK_SETFIB: 4091 { 4092 int numfibs; 4093 size_t intsize = sizeof(int); 4094 4095 action->opcode = O_SETFIB; 4096 NEED1("missing fib number"); 4097 if (_substrcmp(*av, "tablearg") == 0) { 4098 action->arg1 = IP_FW_TARG; 4099 } else { 4100 action->arg1 = strtoul(*av, NULL, 10); 4101 if (sysctlbyname("net.fibs", &numfibs, &intsize, 4102 NULL, 0) == -1) 4103 errx(EX_DATAERR, "fibs not suported.\n"); 4104 if (action->arg1 >= numfibs) /* Temporary */ 4105 errx(EX_DATAERR, "fib too large.\n"); 4106 /* Add high-order bit to fib to make room for tablearg*/ 4107 action->arg1 |= 0x8000; 4108 } 4109 av++; 4110 break; 4111 } 4112 4113 case TOK_SETDSCP: 4114 { 4115 int code; 4116 4117 action->opcode = O_SETDSCP; 4118 NEED1("missing DSCP code"); 4119 if (_substrcmp(*av, "tablearg") == 0) { 4120 action->arg1 = IP_FW_TARG; 4121 } else { 4122 if (isalpha(*av[0])) { 4123 if ((code = match_token(f_ipdscp, *av)) == -1) 4124 errx(EX_DATAERR, "Unknown DSCP code"); 4125 action->arg1 = code; 4126 } else 4127 action->arg1 = strtoul(*av, NULL, 10); 4128 /* 4129 * Add high-order bit to DSCP to make room 4130 * for tablearg 4131 */ 4132 action->arg1 |= 0x8000; 4133 } 4134 av++; 4135 break; 4136 } 4137 4138 case TOK_REASS: 4139 action->opcode = O_REASS; 4140 break; 4141 4142 case TOK_RETURN: 4143 fill_cmd(action, O_CALLRETURN, F_NOT, 0); 4144 break; 4145 4146 case TOK_TCPSETMSS: { 4147 u_long mss; 4148 uint16_t idx; 4149 4150 idx = pack_object(tstate, "tcp-setmss", IPFW_TLV_EACTION); 4151 if (idx == 0) 4152 errx(EX_DATAERR, "pack_object failed"); 4153 fill_cmd(action, O_EXTERNAL_ACTION, 0, idx); 4154 NEED1("Missing MSS value"); 4155 action = next_cmd(action, &ablen); 4156 action->len = 1; 4157 CHECK_ACTLEN; 4158 mss = strtoul(*av, NULL, 10); 4159 if (mss == 0 || mss > UINT16_MAX) 4160 errx(EX_USAGE, "invalid MSS value %s", *av); 4161 fill_cmd(action, O_EXTERNAL_DATA, 0, (uint16_t)mss); 4162 av++; 4163 break; 4164 } 4165 4166 default: 4167 av--; 4168 if (match_token(rule_eactions, *av) == -1) 4169 errx(EX_DATAERR, "invalid action %s\n", *av); 4170 /* 4171 * External actions support. 4172 * XXX: we support only syntax with instance name. 4173 * For known external actions (from rule_eactions list) 4174 * we can handle syntax directly. But with `eaction' 4175 * keyword we can use only `eaction <name> <instance>' 4176 * syntax. 4177 */ 4178 case TOK_EACTION: { 4179 uint16_t idx; 4180 4181 NEED1("Missing eaction name"); 4182 if (eaction_check_name(*av) != 0) 4183 errx(EX_DATAERR, "Invalid eaction name %s", *av); 4184 idx = pack_object(tstate, *av, IPFW_TLV_EACTION); 4185 if (idx == 0) 4186 errx(EX_DATAERR, "pack_object failed"); 4187 fill_cmd(action, O_EXTERNAL_ACTION, 0, idx); 4188 av++; 4189 NEED1("Missing eaction instance name"); 4190 action = next_cmd(action, &ablen); 4191 action->len = 1; 4192 CHECK_ACTLEN; 4193 if (eaction_check_name(*av) != 0) 4194 errx(EX_DATAERR, "Invalid eaction instance name %s", 4195 *av); 4196 /* 4197 * External action instance object has TLV type depended 4198 * from the external action name object index. Since we 4199 * currently don't know this index, use zero as TLV type. 4200 */ 4201 idx = pack_object(tstate, *av, 0); 4202 if (idx == 0) 4203 errx(EX_DATAERR, "pack_object failed"); 4204 fill_cmd(action, O_EXTERNAL_INSTANCE, 0, idx); 4205 av++; 4206 } 4207 } 4208 action = next_cmd(action, &ablen); 4209 4210 /* 4211 * [altq queuename] -- altq tag, optional 4212 * [log [logamount N]] -- log, optional 4213 * 4214 * If they exist, it go first in the cmdbuf, but then it is 4215 * skipped in the copy section to the end of the buffer. 4216 */ 4217 while (av[0] != NULL && (i = match_token(rule_action_params, *av)) != -1) { 4218 av++; 4219 switch (i) { 4220 case TOK_LOG: 4221 { 4222 ipfw_insn_log *c = (ipfw_insn_log *)cmd; 4223 int l; 4224 4225 if (have_log) 4226 errx(EX_DATAERR, 4227 "log cannot be specified more than once"); 4228 have_log = (ipfw_insn *)c; 4229 cmd->len = F_INSN_SIZE(ipfw_insn_log); 4230 CHECK_CMDLEN; 4231 cmd->opcode = O_LOG; 4232 if (av[0] && _substrcmp(*av, "logamount") == 0) { 4233 av++; 4234 NEED1("logamount requires argument"); 4235 l = atoi(*av); 4236 if (l < 0) 4237 errx(EX_DATAERR, 4238 "logamount must be positive"); 4239 c->max_log = l; 4240 av++; 4241 } else { 4242 len = sizeof(c->max_log); 4243 if (sysctlbyname("net.inet.ip.fw.verbose_limit", 4244 &c->max_log, &len, NULL, 0) == -1) { 4245 if (co.test_only) { 4246 c->max_log = 0; 4247 break; 4248 } 4249 errx(1, "sysctlbyname(\"%s\")", 4250 "net.inet.ip.fw.verbose_limit"); 4251 } 4252 } 4253 } 4254 break; 4255 4256#ifndef NO_ALTQ 4257 case TOK_ALTQ: 4258 { 4259 ipfw_insn_altq *a = (ipfw_insn_altq *)cmd; 4260 4261 NEED1("missing altq queue name"); 4262 if (have_altq) 4263 errx(EX_DATAERR, 4264 "altq cannot be specified more than once"); 4265 have_altq = (ipfw_insn *)a; 4266 cmd->len = F_INSN_SIZE(ipfw_insn_altq); 4267 CHECK_CMDLEN; 4268 cmd->opcode = O_ALTQ; 4269 a->qid = altq_name_to_qid(*av); 4270 av++; 4271 } 4272 break; 4273#endif 4274 4275 case TOK_TAG: 4276 case TOK_UNTAG: { 4277 uint16_t tag; 4278 4279 if (have_tag) 4280 errx(EX_USAGE, "tag and untag cannot be " 4281 "specified more than once"); 4282 GET_UINT_ARG(tag, IPFW_ARG_MIN, IPFW_ARG_MAX, i, 4283 rule_action_params); 4284 have_tag = cmd; 4285 fill_cmd(cmd, O_TAG, (i == TOK_TAG) ? 0: F_NOT, tag); 4286 av++; 4287 break; 4288 } 4289 4290 default: 4291 abort(); 4292 } 4293 cmd = next_cmd(cmd, &cblen); 4294 } 4295 4296 if (have_state) { /* must be a check-state, we are done */ 4297 if (*av != NULL && 4298 match_token(rule_options, *av) == TOK_COMMENT) { 4299 /* check-state has a comment */ 4300 av++; 4301 fill_comment(cmd, av, cblen); 4302 cmd = next_cmd(cmd, &cblen); 4303 av[0] = NULL; 4304 } 4305 goto done; 4306 } 4307 4308#define OR_START(target) \ 4309 if (av[0] && (*av[0] == '(' || *av[0] == '{')) { \ 4310 if (open_par) \ 4311 errx(EX_USAGE, "nested \"(\" not allowed\n"); \ 4312 prev = NULL; \ 4313 open_par = 1; \ 4314 if ( (av[0])[1] == '\0') { \ 4315 av++; \ 4316 } else \ 4317 (*av)++; \ 4318 } \ 4319 target: \ 4320 4321 4322#define CLOSE_PAR \ 4323 if (open_par) { \ 4324 if (av[0] && ( \ 4325 strcmp(*av, ")") == 0 || \ 4326 strcmp(*av, "}") == 0)) { \ 4327 prev = NULL; \ 4328 open_par = 0; \ 4329 av++; \ 4330 } else \ 4331 errx(EX_USAGE, "missing \")\"\n"); \ 4332 } 4333 4334#define NOT_BLOCK \ 4335 if (av[0] && _substrcmp(*av, "not") == 0) { \ 4336 if (cmd->len & F_NOT) \ 4337 errx(EX_USAGE, "double \"not\" not allowed\n"); \ 4338 cmd->len |= F_NOT; \ 4339 av++; \ 4340 } 4341 4342#define OR_BLOCK(target) \ 4343 if (av[0] && _substrcmp(*av, "or") == 0) { \ 4344 if (prev == NULL || open_par == 0) \ 4345 errx(EX_DATAERR, "invalid OR block"); \ 4346 prev->len |= F_OR; \ 4347 av++; \ 4348 goto target; \ 4349 } \ 4350 CLOSE_PAR; 4351 4352 first_cmd = cmd; 4353 4354#if 0 4355 /* 4356 * MAC addresses, optional. 4357 * If we have this, we skip the part "proto from src to dst" 4358 * and jump straight to the option parsing. 4359 */ 4360 NOT_BLOCK; 4361 NEED1("missing protocol"); 4362 if (_substrcmp(*av, "MAC") == 0 || 4363 _substrcmp(*av, "mac") == 0) { 4364 av++; /* the "MAC" keyword */ 4365 add_mac(cmd, av); /* exits in case of errors */ 4366 cmd = next_cmd(cmd); 4367 av += 2; /* dst-mac and src-mac */ 4368 NOT_BLOCK; 4369 NEED1("missing mac type"); 4370 if (add_mactype(cmd, av[0])) 4371 cmd = next_cmd(cmd); 4372 av++; /* any or mac-type */ 4373 goto read_options; 4374 } 4375#endif 4376 4377 /* 4378 * protocol, mandatory 4379 */ 4380 OR_START(get_proto); 4381 NOT_BLOCK; 4382 NEED1("missing protocol"); 4383 if (add_proto_compat(cmd, *av, &proto)) { 4384 av++; 4385 if (F_LEN(cmd) != 0) { 4386 prev = cmd; 4387 cmd = next_cmd(cmd, &cblen); 4388 } 4389 } else if (first_cmd != cmd) { 4390 errx(EX_DATAERR, "invalid protocol ``%s''", *av); 4391 } else { 4392 rule->flags |= IPFW_RULE_JUSTOPTS; 4393 goto read_options; 4394 } 4395 OR_BLOCK(get_proto); 4396 4397 first_cmd = cmd; /* update pointer to use in compact form */ 4398 4399 /* 4400 * "from", mandatory 4401 */ 4402 if ((av[0] == NULL) || _substrcmp(*av, "from") != 0) 4403 errx(EX_USAGE, "missing ``from''"); 4404 av++; 4405 4406 /* 4407 * source IP, mandatory 4408 */ 4409 OR_START(source_ip); 4410 NOT_BLOCK; /* optional "not" */ 4411 NEED1("missing source address"); 4412 if (add_src(cmd, *av, proto, cblen, tstate)) { 4413 av++; 4414 if (F_LEN(cmd) != 0) { /* ! any */ 4415 prev = cmd; 4416 cmd = next_cmd(cmd, &cblen); 4417 } 4418 } else 4419 errx(EX_USAGE, "bad source address %s", *av); 4420 OR_BLOCK(source_ip); 4421 4422 /* 4423 * source ports, optional 4424 */ 4425 NOT_BLOCK; /* optional "not" */ 4426 if ( av[0] != NULL ) { 4427 if (_substrcmp(*av, "any") == 0 || 4428 add_ports(cmd, *av, proto, O_IP_SRCPORT, cblen)) { 4429 av++; 4430 if (F_LEN(cmd) != 0) 4431 cmd = next_cmd(cmd, &cblen); 4432 } 4433 } 4434 4435 /* 4436 * "to", mandatory 4437 */ 4438 if ( (av[0] == NULL) || _substrcmp(*av, "to") != 0 ) 4439 errx(EX_USAGE, "missing ``to''"); 4440 av++; 4441 4442 /* 4443 * destination, mandatory 4444 */ 4445 OR_START(dest_ip); 4446 NOT_BLOCK; /* optional "not" */ 4447 NEED1("missing dst address"); 4448 if (add_dst(cmd, *av, proto, cblen, tstate)) { 4449 av++; 4450 if (F_LEN(cmd) != 0) { /* ! any */ 4451 prev = cmd; 4452 cmd = next_cmd(cmd, &cblen); 4453 } 4454 } else 4455 errx( EX_USAGE, "bad destination address %s", *av); 4456 OR_BLOCK(dest_ip); 4457 4458 /* 4459 * dest. ports, optional 4460 */ 4461 NOT_BLOCK; /* optional "not" */ 4462 if (av[0]) { 4463 if (_substrcmp(*av, "any") == 0 || 4464 add_ports(cmd, *av, proto, O_IP_DSTPORT, cblen)) { 4465 av++; 4466 if (F_LEN(cmd) != 0) 4467 cmd = next_cmd(cmd, &cblen); 4468 } 4469 } 4470 if (first_cmd == cmd) 4471 rule->flags |= IPFW_RULE_NOOPT; 4472 4473read_options: 4474 prev = NULL; 4475 while ( av[0] != NULL ) { 4476 char *s; 4477 ipfw_insn_u32 *cmd32; /* alias for cmd */ 4478 4479 s = *av; 4480 cmd32 = (ipfw_insn_u32 *)cmd; 4481 4482 if (*s == '!') { /* alternate syntax for NOT */ 4483 if (cmd->len & F_NOT) 4484 errx(EX_USAGE, "double \"not\" not allowed\n"); 4485 cmd->len = F_NOT; 4486 s++; 4487 } 4488 i = match_token(rule_options, s); 4489 av++; 4490 switch(i) { 4491 case TOK_NOT: 4492 if (cmd->len & F_NOT) 4493 errx(EX_USAGE, "double \"not\" not allowed\n"); 4494 cmd->len = F_NOT; 4495 break; 4496 4497 case TOK_OR: 4498 if (open_par == 0 || prev == NULL) 4499 errx(EX_USAGE, "invalid \"or\" block\n"); 4500 prev->len |= F_OR; 4501 break; 4502 4503 case TOK_STARTBRACE: 4504 if (open_par) 4505 errx(EX_USAGE, "+nested \"(\" not allowed\n"); 4506 open_par = 1; 4507 break; 4508 4509 case TOK_ENDBRACE: 4510 if (!open_par) 4511 errx(EX_USAGE, "+missing \")\"\n"); 4512 open_par = 0; 4513 prev = NULL; 4514 break; 4515 4516 case TOK_IN: 4517 fill_cmd(cmd, O_IN, 0, 0); 4518 break; 4519 4520 case TOK_OUT: 4521 cmd->len ^= F_NOT; /* toggle F_NOT */ 4522 fill_cmd(cmd, O_IN, 0, 0); 4523 break; 4524 4525 case TOK_DIVERTED: 4526 fill_cmd(cmd, O_DIVERTED, 0, 3); 4527 break; 4528 4529 case TOK_DIVERTEDLOOPBACK: 4530 fill_cmd(cmd, O_DIVERTED, 0, 1); 4531 break; 4532 4533 case TOK_DIVERTEDOUTPUT: 4534 fill_cmd(cmd, O_DIVERTED, 0, 2); 4535 break; 4536 4537 case TOK_FRAG: 4538 fill_cmd(cmd, O_FRAG, 0, 0); 4539 break; 4540 4541 case TOK_LAYER2: 4542 fill_cmd(cmd, O_LAYER2, 0, 0); 4543 break; 4544 4545 case TOK_XMIT: 4546 case TOK_RECV: 4547 case TOK_VIA: 4548 NEED1("recv, xmit, via require interface name" 4549 " or address"); 4550 fill_iface((ipfw_insn_if *)cmd, av[0], cblen, tstate); 4551 av++; 4552 if (F_LEN(cmd) == 0) /* not a valid address */ 4553 break; 4554 if (i == TOK_XMIT) 4555 cmd->opcode = O_XMIT; 4556 else if (i == TOK_RECV) 4557 cmd->opcode = O_RECV; 4558 else if (i == TOK_VIA) 4559 cmd->opcode = O_VIA; 4560 break; 4561 4562 case TOK_ICMPTYPES: 4563 NEED1("icmptypes requires list of types"); 4564 fill_icmptypes((ipfw_insn_u32 *)cmd, *av); 4565 av++; 4566 break; 4567 4568 case TOK_ICMP6TYPES: 4569 NEED1("icmptypes requires list of types"); 4570 fill_icmp6types((ipfw_insn_icmp6 *)cmd, *av, cblen); 4571 av++; 4572 break; 4573 4574 case TOK_IPTTL: 4575 NEED1("ipttl requires TTL"); 4576 if (strpbrk(*av, "-,")) { 4577 if (!add_ports(cmd, *av, 0, O_IPTTL, cblen)) 4578 errx(EX_DATAERR, "invalid ipttl %s", *av); 4579 } else 4580 fill_cmd(cmd, O_IPTTL, 0, strtoul(*av, NULL, 0)); 4581 av++; 4582 break; 4583 4584 case TOK_IPID: 4585 NEED1("ipid requires id"); 4586 if (strpbrk(*av, "-,")) { 4587 if (!add_ports(cmd, *av, 0, O_IPID, cblen)) 4588 errx(EX_DATAERR, "invalid ipid %s", *av); 4589 } else 4590 fill_cmd(cmd, O_IPID, 0, strtoul(*av, NULL, 0)); 4591 av++; 4592 break; 4593 4594 case TOK_IPLEN: 4595 NEED1("iplen requires length"); 4596 if (strpbrk(*av, "-,")) { 4597 if (!add_ports(cmd, *av, 0, O_IPLEN, cblen)) 4598 errx(EX_DATAERR, "invalid ip len %s", *av); 4599 } else 4600 fill_cmd(cmd, O_IPLEN, 0, strtoul(*av, NULL, 0)); 4601 av++; 4602 break; 4603 4604 case TOK_IPVER: 4605 NEED1("ipver requires version"); 4606 fill_cmd(cmd, O_IPVER, 0, strtoul(*av, NULL, 0)); 4607 av++; 4608 break; 4609 4610 case TOK_IPPRECEDENCE: 4611 NEED1("ipprecedence requires value"); 4612 fill_cmd(cmd, O_IPPRECEDENCE, 0, 4613 (strtoul(*av, NULL, 0) & 7) << 5); 4614 av++; 4615 break; 4616 4617 case TOK_DSCP: 4618 NEED1("missing DSCP code"); 4619 fill_dscp(cmd, *av, cblen); 4620 av++; 4621 break; 4622 4623 case TOK_IPOPTS: 4624 NEED1("missing argument for ipoptions"); 4625 fill_flags_cmd(cmd, O_IPOPT, f_ipopts, *av); 4626 av++; 4627 break; 4628 4629 case TOK_IPTOS: 4630 NEED1("missing argument for iptos"); 4631 fill_flags_cmd(cmd, O_IPTOS, f_iptos, *av); 4632 av++; 4633 break; 4634 4635 case TOK_UID: 4636 NEED1("uid requires argument"); 4637 { 4638 char *end; 4639 uid_t uid; 4640 struct passwd *pwd; 4641 4642 cmd->opcode = O_UID; 4643 uid = strtoul(*av, &end, 0); 4644 pwd = (*end == '\0') ? getpwuid(uid) : getpwnam(*av); 4645 if (pwd == NULL) 4646 errx(EX_DATAERR, "uid \"%s\" nonexistent", *av); 4647 cmd32->d[0] = pwd->pw_uid; 4648 cmd->len |= F_INSN_SIZE(ipfw_insn_u32); 4649 av++; 4650 } 4651 break; 4652 4653 case TOK_GID: 4654 NEED1("gid requires argument"); 4655 { 4656 char *end; 4657 gid_t gid; 4658 struct group *grp; 4659 4660 cmd->opcode = O_GID; 4661 gid = strtoul(*av, &end, 0); 4662 grp = (*end == '\0') ? getgrgid(gid) : getgrnam(*av); 4663 if (grp == NULL) 4664 errx(EX_DATAERR, "gid \"%s\" nonexistent", *av); 4665 cmd32->d[0] = grp->gr_gid; 4666 cmd->len |= F_INSN_SIZE(ipfw_insn_u32); 4667 av++; 4668 } 4669 break; 4670 4671 case TOK_JAIL: 4672 NEED1("jail requires argument"); 4673 { 4674 char *end; 4675 int jid; 4676 4677 cmd->opcode = O_JAIL; 4678 /* 4679 * If av is a number, then we'll just pass it as-is. If 4680 * it's a name, try to resolve that to a jid. 4681 * 4682 * We save the jail_getid(3) call for a fallback because 4683 * it entails an unconditional trip to the kernel to 4684 * either validate a jid or resolve a name to a jid. 4685 * This specific token doesn't currently require a 4686 * jid to be an active jail, so we save a transition 4687 * by simply using a number that we're given. 4688 */ 4689 jid = strtoul(*av, &end, 10); 4690 if (*end != '\0') { 4691 jid = jail_getid(*av); 4692 if (jid < 0) 4693 errx(EX_DATAERR, "%s", jail_errmsg); 4694 } 4695 cmd32->d[0] = (uint32_t)jid; 4696 cmd->len |= F_INSN_SIZE(ipfw_insn_u32); 4697 av++; 4698 } 4699 break; 4700 4701 case TOK_ESTAB: 4702 fill_cmd(cmd, O_ESTAB, 0, 0); 4703 break; 4704 4705 case TOK_SETUP: 4706 fill_cmd(cmd, O_TCPFLAGS, 0, 4707 (TH_SYN) | ( (TH_ACK) & 0xff) <<8 ); 4708 break; 4709 4710 case TOK_TCPDATALEN: 4711 NEED1("tcpdatalen requires length"); 4712 if (strpbrk(*av, "-,")) { 4713 if (!add_ports(cmd, *av, 0, O_TCPDATALEN, cblen)) 4714 errx(EX_DATAERR, "invalid tcpdata len %s", *av); 4715 } else 4716 fill_cmd(cmd, O_TCPDATALEN, 0, 4717 strtoul(*av, NULL, 0)); 4718 av++; 4719 break; 4720 4721 case TOK_TCPOPTS: 4722 NEED1("missing argument for tcpoptions"); 4723 fill_flags_cmd(cmd, O_TCPOPTS, f_tcpopts, *av); 4724 av++; 4725 break; 4726 4727 case TOK_TCPSEQ: 4728 case TOK_TCPACK: 4729 NEED1("tcpseq/tcpack requires argument"); 4730 cmd->len = F_INSN_SIZE(ipfw_insn_u32); 4731 cmd->opcode = (i == TOK_TCPSEQ) ? O_TCPSEQ : O_TCPACK; 4732 cmd32->d[0] = htonl(strtoul(*av, NULL, 0)); 4733 av++; 4734 break; 4735 4736 case TOK_TCPMSS: 4737 case TOK_TCPWIN: 4738 NEED1("tcpmss/tcpwin requires size"); 4739 if (strpbrk(*av, "-,")) { 4740 if (add_ports(cmd, *av, 0, 4741 i == TOK_TCPWIN ? O_TCPWIN : O_TCPMSS, 4742 cblen) == NULL) 4743 errx(EX_DATAERR, "invalid %s size %s", 4744 s, *av); 4745 } else 4746 fill_cmd(cmd, i == TOK_TCPWIN ? O_TCPWIN : 4747 O_TCPMSS, 0, strtoul(*av, NULL, 0)); 4748 av++; 4749 break; 4750 4751 case TOK_TCPFLAGS: 4752 NEED1("missing argument for tcpflags"); 4753 cmd->opcode = O_TCPFLAGS; 4754 fill_flags_cmd(cmd, O_TCPFLAGS, f_tcpflags, *av); 4755 av++; 4756 break; 4757 4758 case TOK_KEEPSTATE: 4759 case TOK_RECORDSTATE: { 4760 uint16_t uidx; 4761 4762 if (open_par) 4763 errx(EX_USAGE, "keep-state or record-state cannot be part " 4764 "of an or block"); 4765 if (have_state) 4766 errx(EX_USAGE, "only one of keep-state, record-state, " 4767 " limit and set-limit is allowed"); 4768 if (*av != NULL && *av[0] == ':') { 4769 if (state_check_name(*av + 1) != 0) 4770 errx(EX_DATAERR, 4771 "Invalid state name %s", *av); 4772 uidx = pack_object(tstate, *av + 1, 4773 IPFW_TLV_STATE_NAME); 4774 av++; 4775 } else 4776 uidx = pack_object(tstate, default_state_name, 4777 IPFW_TLV_STATE_NAME); 4778 have_state = cmd; 4779 have_rstate = i == TOK_RECORDSTATE; 4780 fill_cmd(cmd, O_KEEP_STATE, 0, uidx); 4781 break; 4782 } 4783 4784 case TOK_LIMIT: 4785 case TOK_SETLIMIT: { 4786 ipfw_insn_limit *c = (ipfw_insn_limit *)cmd; 4787 int val; 4788 4789 if (open_par) 4790 errx(EX_USAGE, 4791 "limit or set-limit cannot be part of an or block"); 4792 if (have_state) 4793 errx(EX_USAGE, "only one of keep-state, record-state, " 4794 " limit and set-limit is allowed"); 4795 have_state = cmd; 4796 have_rstate = i == TOK_SETLIMIT; 4797 4798 cmd->len = F_INSN_SIZE(ipfw_insn_limit); 4799 CHECK_CMDLEN; 4800 cmd->opcode = O_LIMIT; 4801 c->limit_mask = c->conn_limit = 0; 4802 4803 while ( av[0] != NULL ) { 4804 if ((val = match_token(limit_masks, *av)) <= 0) 4805 break; 4806 c->limit_mask |= val; 4807 av++; 4808 } 4809 4810 if (c->limit_mask == 0) 4811 errx(EX_USAGE, "limit: missing limit mask"); 4812 4813 GET_UINT_ARG(c->conn_limit, IPFW_ARG_MIN, IPFW_ARG_MAX, 4814 TOK_LIMIT, rule_options); 4815 av++; 4816 4817 if (*av != NULL && *av[0] == ':') { 4818 if (state_check_name(*av + 1) != 0) 4819 errx(EX_DATAERR, 4820 "Invalid state name %s", *av); 4821 cmd->arg1 = pack_object(tstate, *av + 1, 4822 IPFW_TLV_STATE_NAME); 4823 av++; 4824 } else 4825 cmd->arg1 = pack_object(tstate, 4826 default_state_name, IPFW_TLV_STATE_NAME); 4827 break; 4828 } 4829 4830 case TOK_PROTO: 4831 NEED1("missing protocol"); 4832 if (add_proto(cmd, *av, &proto)) { 4833 av++; 4834 } else 4835 errx(EX_DATAERR, "invalid protocol ``%s''", 4836 *av); 4837 break; 4838 4839 case TOK_SRCIP: 4840 NEED1("missing source IP"); 4841 if (add_srcip(cmd, *av, cblen, tstate)) { 4842 av++; 4843 } 4844 break; 4845 4846 case TOK_DSTIP: 4847 NEED1("missing destination IP"); 4848 if (add_dstip(cmd, *av, cblen, tstate)) { 4849 av++; 4850 } 4851 break; 4852 4853 case TOK_SRCIP6: 4854 NEED1("missing source IP6"); 4855 if (add_srcip6(cmd, *av, cblen, tstate)) { 4856 av++; 4857 } 4858 break; 4859 4860 case TOK_DSTIP6: 4861 NEED1("missing destination IP6"); 4862 if (add_dstip6(cmd, *av, cblen, tstate)) { 4863 av++; 4864 } 4865 break; 4866 4867 case TOK_SRCPORT: 4868 NEED1("missing source port"); 4869 if (_substrcmp(*av, "any") == 0 || 4870 add_ports(cmd, *av, proto, O_IP_SRCPORT, cblen)) { 4871 av++; 4872 } else 4873 errx(EX_DATAERR, "invalid source port %s", *av); 4874 break; 4875 4876 case TOK_DSTPORT: 4877 NEED1("missing destination port"); 4878 if (_substrcmp(*av, "any") == 0 || 4879 add_ports(cmd, *av, proto, O_IP_DSTPORT, cblen)) { 4880 av++; 4881 } else 4882 errx(EX_DATAERR, "invalid destination port %s", 4883 *av); 4884 break; 4885 4886 case TOK_MAC: 4887 if (add_mac(cmd, av, cblen)) 4888 av += 2; 4889 break; 4890 4891 case TOK_MACTYPE: 4892 NEED1("missing mac type"); 4893 if (!add_mactype(cmd, *av, cblen)) 4894 errx(EX_DATAERR, "invalid mac type %s", *av); 4895 av++; 4896 break; 4897 4898 case TOK_VERREVPATH: 4899 fill_cmd(cmd, O_VERREVPATH, 0, 0); 4900 break; 4901 4902 case TOK_VERSRCREACH: 4903 fill_cmd(cmd, O_VERSRCREACH, 0, 0); 4904 break; 4905 4906 case TOK_ANTISPOOF: 4907 fill_cmd(cmd, O_ANTISPOOF, 0, 0); 4908 break; 4909 4910 case TOK_IPSEC: 4911 fill_cmd(cmd, O_IPSEC, 0, 0); 4912 break; 4913 4914 case TOK_IPV6: 4915 fill_cmd(cmd, O_IP6, 0, 0); 4916 break; 4917 4918 case TOK_IPV4: 4919 fill_cmd(cmd, O_IP4, 0, 0); 4920 break; 4921 4922 case TOK_EXT6HDR: 4923 fill_ext6hdr( cmd, *av ); 4924 av++; 4925 break; 4926 4927 case TOK_FLOWID: 4928 if (proto != IPPROTO_IPV6 ) 4929 errx( EX_USAGE, "flow-id filter is active " 4930 "only for ipv6 protocol\n"); 4931 fill_flow6( (ipfw_insn_u32 *) cmd, *av, cblen); 4932 av++; 4933 break; 4934 4935 case TOK_COMMENT: 4936 fill_comment(cmd, av, cblen); 4937 av[0]=NULL; 4938 break; 4939 4940 case TOK_TAGGED: 4941 if (av[0] && strpbrk(*av, "-,")) { 4942 if (!add_ports(cmd, *av, 0, O_TAGGED, cblen)) 4943 errx(EX_DATAERR, "tagged: invalid tag" 4944 " list: %s", *av); 4945 } 4946 else { 4947 uint16_t tag; 4948 4949 GET_UINT_ARG(tag, IPFW_ARG_MIN, IPFW_ARG_MAX, 4950 TOK_TAGGED, rule_options); 4951 fill_cmd(cmd, O_TAGGED, 0, tag); 4952 } 4953 av++; 4954 break; 4955 4956 case TOK_FIB: 4957 NEED1("fib requires fib number"); 4958 fill_cmd(cmd, O_FIB, 0, strtoul(*av, NULL, 0)); 4959 av++; 4960 break; 4961 case TOK_SOCKARG: 4962 fill_cmd(cmd, O_SOCKARG, 0, 0); 4963 break; 4964 4965 case TOK_LOOKUP: { 4966 ipfw_insn_u32 *c = (ipfw_insn_u32 *)cmd; 4967 int j; 4968 4969 if (!av[0] || !av[1]) 4970 errx(EX_USAGE, "format: lookup argument tablenum"); 4971 cmd->opcode = O_IP_DST_LOOKUP; 4972 cmd->len |= F_INSN_SIZE(ipfw_insn) + 2; 4973 i = match_token(rule_options, *av); 4974 for (j = 0; lookup_key[j] >= 0 ; j++) { 4975 if (i == lookup_key[j]) 4976 break; 4977 } 4978 if (lookup_key[j] <= 0) 4979 errx(EX_USAGE, "format: cannot lookup on %s", *av); 4980 __PAST_END(c->d, 1) = j; // i converted to option 4981 av++; 4982 4983 if ((j = pack_table(tstate, *av)) == 0) 4984 errx(EX_DATAERR, "Invalid table name: %s", *av); 4985 4986 cmd->arg1 = j; 4987 av++; 4988 } 4989 break; 4990 case TOK_FLOW: 4991 NEED1("missing table name"); 4992 if (strncmp(*av, "table(", 6) != 0) 4993 errx(EX_DATAERR, 4994 "enclose table name into \"table()\""); 4995 fill_table(cmd, *av, O_IP_FLOW_LOOKUP, tstate); 4996 av++; 4997 break; 4998 4999 case TOK_SKIPACTION: 5000 if (have_skipcmd) 5001 errx(EX_USAGE, "only one defer-action " 5002 "is allowed"); 5003 have_skipcmd = cmd; 5004 fill_cmd(cmd, O_SKIP_ACTION, 0, 0); 5005 break; 5006 5007 default: 5008 errx(EX_USAGE, "unrecognised option [%d] %s\n", i, s); 5009 } 5010 if (F_LEN(cmd) > 0) { /* prepare to advance */ 5011 prev = cmd; 5012 cmd = next_cmd(cmd, &cblen); 5013 } 5014 } 5015 5016done: 5017 5018 if (!have_state && have_skipcmd) 5019 warnx("Rule contains \"defer-immediate-action\" " 5020 "and doesn't contain any state-related options."); 5021 5022 /* 5023 * Now copy stuff into the rule. 5024 * If we have a keep-state option, the first instruction 5025 * must be a PROBE_STATE (which is generated here). 5026 * If we have a LOG option, it was stored as the first command, 5027 * and now must be moved to the top of the action part. 5028 */ 5029 dst = (ipfw_insn *)rule->cmd; 5030 5031 /* 5032 * First thing to write into the command stream is the match probability. 5033 */ 5034 if (match_prob != 1) { /* 1 means always match */ 5035 dst->opcode = O_PROB; 5036 dst->len = 2; 5037 *((int32_t *)(dst+1)) = (int32_t)(match_prob * 0x7fffffff); 5038 dst += dst->len; 5039 } 5040 5041 /* 5042 * generate O_PROBE_STATE if necessary 5043 */ 5044 if (have_state && have_state->opcode != O_CHECK_STATE && !have_rstate) { 5045 fill_cmd(dst, O_PROBE_STATE, 0, have_state->arg1); 5046 dst = next_cmd(dst, &rblen); 5047 } 5048 5049 /* 5050 * copy all commands but O_LOG, O_KEEP_STATE, O_LIMIT, O_ALTQ, O_TAG, 5051 * O_SKIP_ACTION 5052 */ 5053 for (src = (ipfw_insn *)cmdbuf; src != cmd; src += i) { 5054 i = F_LEN(src); 5055 CHECK_RBUFLEN(i); 5056 5057 switch (src->opcode) { 5058 case O_LOG: 5059 case O_KEEP_STATE: 5060 case O_LIMIT: 5061 case O_ALTQ: 5062 case O_TAG: 5063 case O_SKIP_ACTION: 5064 break; 5065 default: 5066 bcopy(src, dst, i * sizeof(uint32_t)); 5067 dst += i; 5068 } 5069 } 5070 5071 /* 5072 * put back the have_state command as last opcode 5073 */ 5074 if (have_state && have_state->opcode != O_CHECK_STATE) { 5075 i = F_LEN(have_state); 5076 CHECK_RBUFLEN(i); 5077 bcopy(have_state, dst, i * sizeof(uint32_t)); 5078 dst += i; 5079 } 5080 5081 /* 5082 * put back the have_skipcmd command as very last opcode 5083 */ 5084 if (have_skipcmd) { 5085 i = F_LEN(have_skipcmd); 5086 CHECK_RBUFLEN(i); 5087 bcopy(have_skipcmd, dst, i * sizeof(uint32_t)); 5088 dst += i; 5089 } 5090 5091 /* 5092 * start action section 5093 */ 5094 rule->act_ofs = dst - rule->cmd; 5095 5096 /* put back O_LOG, O_ALTQ, O_TAG if necessary */ 5097 if (have_log) { 5098 i = F_LEN(have_log); 5099 CHECK_RBUFLEN(i); 5100 bcopy(have_log, dst, i * sizeof(uint32_t)); 5101 dst += i; 5102 } 5103 if (have_altq) { 5104 i = F_LEN(have_altq); 5105 CHECK_RBUFLEN(i); 5106 bcopy(have_altq, dst, i * sizeof(uint32_t)); 5107 dst += i; 5108 } 5109 if (have_tag) { 5110 i = F_LEN(have_tag); 5111 CHECK_RBUFLEN(i); 5112 bcopy(have_tag, dst, i * sizeof(uint32_t)); 5113 dst += i; 5114 } 5115 5116 /* 5117 * copy all other actions 5118 */ 5119 for (src = (ipfw_insn *)actbuf; src != action; src += i) { 5120 i = F_LEN(src); 5121 CHECK_RBUFLEN(i); 5122 bcopy(src, dst, i * sizeof(uint32_t)); 5123 dst += i; 5124 } 5125 5126 rule->cmd_len = (uint32_t *)dst - (uint32_t *)(rule->cmd); 5127 *rbufsize = (char *)dst - (char *)rule; 5128} 5129 5130static int 5131compare_ntlv(const void *_a, const void *_b) 5132{ 5133 ipfw_obj_ntlv *a, *b; 5134 5135 a = (ipfw_obj_ntlv *)_a; 5136 b = (ipfw_obj_ntlv *)_b; 5137 5138 if (a->set < b->set) 5139 return (-1); 5140 else if (a->set > b->set) 5141 return (1); 5142 5143 if (a->idx < b->idx) 5144 return (-1); 5145 else if (a->idx > b->idx) 5146 return (1); 5147 5148 if (a->head.type < b->head.type) 5149 return (-1); 5150 else if (a->head.type > b->head.type) 5151 return (1); 5152 5153 return (0); 5154} 5155 5156/* 5157 * Provide kernel with sorted list of referenced objects 5158 */ 5159static void 5160object_sort_ctlv(ipfw_obj_ctlv *ctlv) 5161{ 5162 5163 qsort(ctlv + 1, ctlv->count, ctlv->objsize, compare_ntlv); 5164} 5165 5166struct object_kt { 5167 uint16_t uidx; 5168 uint16_t type; 5169}; 5170static int 5171compare_object_kntlv(const void *k, const void *v) 5172{ 5173 ipfw_obj_ntlv *ntlv; 5174 struct object_kt key; 5175 5176 key = *((struct object_kt *)k); 5177 ntlv = (ipfw_obj_ntlv *)v; 5178 5179 if (key.uidx < ntlv->idx) 5180 return (-1); 5181 else if (key.uidx > ntlv->idx) 5182 return (1); 5183 5184 if (key.type < ntlv->head.type) 5185 return (-1); 5186 else if (key.type > ntlv->head.type) 5187 return (1); 5188 5189 return (0); 5190} 5191 5192/* 5193 * Finds object name in @ctlv by @idx and @type. 5194 * Uses the following facts: 5195 * 1) All TLVs are the same size 5196 * 2) Kernel implementation provides already sorted list. 5197 * 5198 * Returns table name or NULL. 5199 */ 5200static char * 5201object_search_ctlv(ipfw_obj_ctlv *ctlv, uint16_t idx, uint16_t type) 5202{ 5203 ipfw_obj_ntlv *ntlv; 5204 struct object_kt key; 5205 5206 key.uidx = idx; 5207 key.type = type; 5208 5209 ntlv = bsearch(&key, (ctlv + 1), ctlv->count, ctlv->objsize, 5210 compare_object_kntlv); 5211 5212 if (ntlv != NULL) 5213 return (ntlv->name); 5214 5215 return (NULL); 5216} 5217 5218static char * 5219table_search_ctlv(ipfw_obj_ctlv *ctlv, uint16_t idx) 5220{ 5221 5222 return (object_search_ctlv(ctlv, idx, IPFW_TLV_TBL_NAME)); 5223} 5224 5225/* 5226 * Adds one or more rules to ipfw chain. 5227 * Data layout: 5228 * Request: 5229 * [ 5230 * ip_fw3_opheader 5231 * [ ipfw_obj_ctlv(IPFW_TLV_TBL_LIST) ipfw_obj_ntlv x N ] (optional *1) 5232 * [ ipfw_obj_ctlv(IPFW_TLV_RULE_LIST) [ ip_fw_rule ip_fw_insn ] x N ] (*2) (*3) 5233 * ] 5234 * Reply: 5235 * [ 5236 * ip_fw3_opheader 5237 * [ ipfw_obj_ctlv(IPFW_TLV_TBL_LIST) ipfw_obj_ntlv x N ] (optional) 5238 * [ ipfw_obj_ctlv(IPFW_TLV_RULE_LIST) [ ip_fw_rule ip_fw_insn ] x N ] 5239 * ] 5240 * 5241 * Rules in reply are modified to store their actual ruleset number. 5242 * 5243 * (*1) TLVs inside IPFW_TLV_TBL_LIST needs to be sorted ascending 5244 * according to their idx field and there has to be no duplicates. 5245 * (*2) Numbered rules inside IPFW_TLV_RULE_LIST needs to be sorted ascending. 5246 * (*3) Each ip_fw structure needs to be aligned to u64 boundary. 5247 */ 5248void 5249ipfw_add(char *av[]) 5250{ 5251 uint32_t rulebuf[1024]; 5252 int rbufsize, default_off, tlen, rlen; 5253 size_t sz; 5254 struct tidx ts; 5255 struct ip_fw_rule *rule; 5256 caddr_t tbuf; 5257 ip_fw3_opheader *op3; 5258 ipfw_obj_ctlv *ctlv, *tstate; 5259 5260 rbufsize = sizeof(rulebuf); 5261 memset(rulebuf, 0, rbufsize); 5262 memset(&ts, 0, sizeof(ts)); 5263 5264 /* Optimize case with no tables */ 5265 default_off = sizeof(ipfw_obj_ctlv) + sizeof(ip_fw3_opheader); 5266 op3 = (ip_fw3_opheader *)rulebuf; 5267 ctlv = (ipfw_obj_ctlv *)(op3 + 1); 5268 rule = (struct ip_fw_rule *)(ctlv + 1); 5269 rbufsize -= default_off; 5270 5271 compile_rule(av, (uint32_t *)rule, &rbufsize, &ts); 5272 /* Align rule size to u64 boundary */ 5273 rlen = roundup2(rbufsize, sizeof(uint64_t)); 5274 5275 tbuf = NULL; 5276 sz = 0; 5277 tstate = NULL; 5278 if (ts.count != 0) { 5279 /* Some tables. We have to alloc more data */ 5280 tlen = ts.count * sizeof(ipfw_obj_ntlv); 5281 sz = default_off + sizeof(ipfw_obj_ctlv) + tlen + rlen; 5282 5283 if ((tbuf = calloc(1, sz)) == NULL) 5284 err(EX_UNAVAILABLE, "malloc() failed for IP_FW_ADD"); 5285 op3 = (ip_fw3_opheader *)tbuf; 5286 /* Tables first */ 5287 ctlv = (ipfw_obj_ctlv *)(op3 + 1); 5288 ctlv->head.type = IPFW_TLV_TBLNAME_LIST; 5289 ctlv->head.length = sizeof(ipfw_obj_ctlv) + tlen; 5290 ctlv->count = ts.count; 5291 ctlv->objsize = sizeof(ipfw_obj_ntlv); 5292 memcpy(ctlv + 1, ts.idx, tlen); 5293 object_sort_ctlv(ctlv); 5294 tstate = ctlv; 5295 /* Rule next */ 5296 ctlv = (ipfw_obj_ctlv *)((caddr_t)ctlv + ctlv->head.length); 5297 ctlv->head.type = IPFW_TLV_RULE_LIST; 5298 ctlv->head.length = sizeof(ipfw_obj_ctlv) + rlen; 5299 ctlv->count = 1; 5300 memcpy(ctlv + 1, rule, rbufsize); 5301 } else { 5302 /* Simply add header */ 5303 sz = rlen + default_off; 5304 memset(ctlv, 0, sizeof(*ctlv)); 5305 ctlv->head.type = IPFW_TLV_RULE_LIST; 5306 ctlv->head.length = sizeof(ipfw_obj_ctlv) + rlen; 5307 ctlv->count = 1; 5308 } 5309 5310 if (do_get3(IP_FW_XADD, op3, &sz) != 0) 5311 err(EX_UNAVAILABLE, "getsockopt(%s)", "IP_FW_XADD"); 5312 5313 if (!co.do_quiet) { 5314 struct format_opts sfo; 5315 struct buf_pr bp; 5316 memset(&sfo, 0, sizeof(sfo)); 5317 sfo.tstate = tstate; 5318 sfo.set_mask = (uint32_t)(-1); 5319 bp_alloc(&bp, 4096); 5320 show_static_rule(&co, &sfo, &bp, rule, NULL); 5321 printf("%s", bp.buf); 5322 bp_free(&bp); 5323 } 5324 5325 if (tbuf != NULL) 5326 free(tbuf); 5327 5328 if (ts.idx != NULL) 5329 free(ts.idx); 5330} 5331 5332/* 5333 * clear the counters or the log counters. 5334 * optname has the following values: 5335 * 0 (zero both counters and logging) 5336 * 1 (zero logging only) 5337 */ 5338void 5339ipfw_zero(int ac, char *av[], int optname) 5340{ 5341 ipfw_range_tlv rt; 5342 char const *errstr; 5343 char const *name = optname ? "RESETLOG" : "ZERO"; 5344 uint32_t arg; 5345 int failed = EX_OK; 5346 5347 optname = optname ? IP_FW_XRESETLOG : IP_FW_XZERO; 5348 av++; ac--; 5349 5350 if (ac == 0) { 5351 /* clear all entries */ 5352 memset(&rt, 0, sizeof(rt)); 5353 rt.flags = IPFW_RCFLAG_ALL; 5354 if (do_range_cmd(optname, &rt) < 0) 5355 err(EX_UNAVAILABLE, "setsockopt(IP_FW_X%s)", name); 5356 if (!co.do_quiet) 5357 printf("%s.\n", optname == IP_FW_XZERO ? 5358 "Accounting cleared":"Logging counts reset"); 5359 5360 return; 5361 } 5362 5363 while (ac) { 5364 /* Rule number */ 5365 if (isdigit(**av)) { 5366 arg = strtonum(*av, 0, 0xffff, &errstr); 5367 if (errstr) 5368 errx(EX_DATAERR, 5369 "invalid rule number %s\n", *av); 5370 memset(&rt, 0, sizeof(rt)); 5371 rt.start_rule = arg; 5372 rt.end_rule = arg; 5373 rt.flags |= IPFW_RCFLAG_RANGE; 5374 if (co.use_set != 0) { 5375 rt.set = co.use_set - 1; 5376 rt.flags |= IPFW_RCFLAG_SET; 5377 } 5378 if (do_range_cmd(optname, &rt) != 0) { 5379 warn("rule %u: setsockopt(IP_FW_X%s)", 5380 arg, name); 5381 failed = EX_UNAVAILABLE; 5382 } else if (rt.new_set == 0) { 5383 printf("Entry %d not found\n", arg); 5384 failed = EX_UNAVAILABLE; 5385 } else if (!co.do_quiet) 5386 printf("Entry %d %s.\n", arg, 5387 optname == IP_FW_XZERO ? 5388 "cleared" : "logging count reset"); 5389 } else { 5390 errx(EX_USAGE, "invalid rule number ``%s''", *av); 5391 } 5392 av++; ac--; 5393 } 5394 if (failed != EX_OK) 5395 exit(failed); 5396} 5397 5398void 5399ipfw_flush(int force) 5400{ 5401 ipfw_range_tlv rt; 5402 5403 if (!force && !co.do_quiet) { /* need to ask user */ 5404 int c; 5405 5406 printf("Are you sure? [yn] "); 5407 fflush(stdout); 5408 do { 5409 c = toupper(getc(stdin)); 5410 while (c != '\n' && getc(stdin) != '\n') 5411 if (feof(stdin)) 5412 return; /* and do not flush */ 5413 } while (c != 'Y' && c != 'N'); 5414 printf("\n"); 5415 if (c == 'N') /* user said no */ 5416 return; 5417 } 5418 if (co.do_pipe) { 5419 dummynet_flush(); 5420 return; 5421 } 5422 /* `ipfw set N flush` - is the same that `ipfw delete set N` */ 5423 memset(&rt, 0, sizeof(rt)); 5424 if (co.use_set != 0) { 5425 rt.set = co.use_set - 1; 5426 rt.flags = IPFW_RCFLAG_SET; 5427 } else 5428 rt.flags = IPFW_RCFLAG_ALL; 5429 if (do_range_cmd(IP_FW_XDEL, &rt) != 0) 5430 err(EX_UNAVAILABLE, "setsockopt(IP_FW_XDEL)"); 5431 if (!co.do_quiet) 5432 printf("Flushed all %s.\n", co.do_pipe ? "pipes" : "rules"); 5433} 5434 5435static struct _s_x intcmds[] = { 5436 { "talist", TOK_TALIST }, 5437 { "iflist", TOK_IFLIST }, 5438 { "olist", TOK_OLIST }, 5439 { "vlist", TOK_VLIST }, 5440 { NULL, 0 } 5441}; 5442 5443static struct _s_x otypes[] = { 5444 { "EACTION", IPFW_TLV_EACTION }, 5445 { "DYNSTATE", IPFW_TLV_STATE_NAME }, 5446 { NULL, 0 } 5447}; 5448 5449static const char* 5450lookup_eaction_name(ipfw_obj_ntlv *ntlv, int cnt, uint16_t type) 5451{ 5452 const char *name; 5453 int i; 5454 5455 name = NULL; 5456 for (i = 0; i < cnt; i++) { 5457 if (ntlv[i].head.type != IPFW_TLV_EACTION) 5458 continue; 5459 if (IPFW_TLV_EACTION_NAME(ntlv[i].idx) != type) 5460 continue; 5461 name = ntlv[i].name; 5462 break; 5463 } 5464 return (name); 5465} 5466 5467static void 5468ipfw_list_objects(int ac, char *av[]) 5469{ 5470 ipfw_obj_lheader req, *olh; 5471 ipfw_obj_ntlv *ntlv; 5472 const char *name; 5473 size_t sz; 5474 int i; 5475 5476 memset(&req, 0, sizeof(req)); 5477 sz = sizeof(req); 5478 if (do_get3(IP_FW_DUMP_SRVOBJECTS, &req.opheader, &sz) != 0) 5479 if (errno != ENOMEM) 5480 return; 5481 5482 sz = req.size; 5483 if ((olh = calloc(1, sz)) == NULL) 5484 return; 5485 5486 olh->size = sz; 5487 if (do_get3(IP_FW_DUMP_SRVOBJECTS, &olh->opheader, &sz) != 0) { 5488 free(olh); 5489 return; 5490 } 5491 5492 if (olh->count > 0) 5493 printf("Objects list:\n"); 5494 else 5495 printf("There are no objects\n"); 5496 ntlv = (ipfw_obj_ntlv *)(olh + 1); 5497 for (i = 0; i < olh->count; i++) { 5498 name = match_value(otypes, ntlv->head.type); 5499 if (name == NULL) 5500 name = lookup_eaction_name( 5501 (ipfw_obj_ntlv *)(olh + 1), olh->count, 5502 ntlv->head.type); 5503 if (name == NULL) 5504 printf(" kidx: %4d\ttype: %10d\tname: %s\n", 5505 ntlv->idx, ntlv->head.type, ntlv->name); 5506 else 5507 printf(" kidx: %4d\ttype: %10s\tname: %s\n", 5508 ntlv->idx, name, ntlv->name); 5509 ntlv++; 5510 } 5511 free(olh); 5512} 5513 5514void 5515ipfw_internal_handler(int ac, char *av[]) 5516{ 5517 int tcmd; 5518 5519 ac--; av++; 5520 NEED1("internal cmd required"); 5521 5522 if ((tcmd = match_token(intcmds, *av)) == -1) 5523 errx(EX_USAGE, "invalid internal sub-cmd: %s", *av); 5524 5525 switch (tcmd) { 5526 case TOK_IFLIST: 5527 ipfw_list_tifaces(); 5528 break; 5529 case TOK_TALIST: 5530 ipfw_list_ta(ac, av); 5531 break; 5532 case TOK_OLIST: 5533 ipfw_list_objects(ac, av); 5534 break; 5535 case TOK_VLIST: 5536 ipfw_list_values(ac, av); 5537 break; 5538 } 5539} 5540 5541static int 5542ipfw_get_tracked_ifaces(ipfw_obj_lheader **polh) 5543{ 5544 ipfw_obj_lheader req, *olh; 5545 size_t sz; 5546 5547 memset(&req, 0, sizeof(req)); 5548 sz = sizeof(req); 5549 5550 if (do_get3(IP_FW_XIFLIST, &req.opheader, &sz) != 0) { 5551 if (errno != ENOMEM) 5552 return (errno); 5553 } 5554 5555 sz = req.size; 5556 if ((olh = calloc(1, sz)) == NULL) 5557 return (ENOMEM); 5558 5559 olh->size = sz; 5560 if (do_get3(IP_FW_XIFLIST, &olh->opheader, &sz) != 0) { 5561 free(olh); 5562 return (errno); 5563 } 5564 5565 *polh = olh; 5566 return (0); 5567} 5568 5569static int 5570ifinfo_cmp(const void *a, const void *b) 5571{ 5572 ipfw_iface_info *ia, *ib; 5573 5574 ia = (ipfw_iface_info *)a; 5575 ib = (ipfw_iface_info *)b; 5576 5577 return (stringnum_cmp(ia->ifname, ib->ifname)); 5578} 5579 5580/* 5581 * Retrieves table list from kernel, 5582 * optionally sorts it and calls requested function for each table. 5583 * Returns 0 on success. 5584 */ 5585static void 5586ipfw_list_tifaces() 5587{ 5588 ipfw_obj_lheader *olh; 5589 ipfw_iface_info *info; 5590 int i, error; 5591 5592 if ((error = ipfw_get_tracked_ifaces(&olh)) != 0) 5593 err(EX_OSERR, "Unable to request ipfw tracked interface list"); 5594 5595 5596 qsort(olh + 1, olh->count, olh->objsize, ifinfo_cmp); 5597 5598 info = (ipfw_iface_info *)(olh + 1); 5599 for (i = 0; i < olh->count; i++) { 5600 if (info->flags & IPFW_IFFLAG_RESOLVED) 5601 printf("%s ifindex: %d refcount: %u changes: %u\n", 5602 info->ifname, info->ifindex, info->refcnt, 5603 info->gencnt); 5604 else 5605 printf("%s ifindex: unresolved refcount: %u changes: %u\n", 5606 info->ifname, info->refcnt, info->gencnt); 5607 info = (ipfw_iface_info *)((caddr_t)info + olh->objsize); 5608 } 5609 5610 free(olh); 5611} 5612 5613 5614 5615 5616