ipfw2.c revision 327518
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 327518 2018-01-03 12:18:55Z ae $ 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 <netdb.h> 36#include <pwd.h> 37#include <stdio.h> 38#include <stdarg.h> 39#include <stdint.h> 40#include <stdlib.h> 41#include <string.h> 42#include <sysexits.h> 43#include <time.h> /* ctime */ 44#include <timeconv.h> /* _long_to_time */ 45#include <unistd.h> 46#include <fcntl.h> 47#include <stddef.h> /* offsetof */ 48 49#include <net/ethernet.h> 50#include <net/if.h> /* only IFNAMSIZ */ 51#include <netinet/in.h> 52#include <netinet/in_systm.h> /* only n_short, n_long */ 53#include <netinet/ip.h> 54#include <netinet/ip_icmp.h> 55#include <netinet/ip_fw.h> 56#include <netinet/tcp.h> 57#include <arpa/inet.h> 58 59struct cmdline_opts co; /* global options */ 60 61struct format_opts { 62 int bcwidth; 63 int pcwidth; 64 int show_counters; 65 int show_time; /* show timestamp */ 66 uint32_t set_mask; /* enabled sets mask */ 67 uint32_t flags; /* request flags */ 68 uint32_t first; /* first rule to request */ 69 uint32_t last; /* last rule to request */ 70 uint32_t dcnt; /* number of dynamic states */ 71 ipfw_obj_ctlv *tstate; /* table state data */ 72}; 73 74int resvd_set_number = RESVD_SET; 75 76int ipfw_socket = -1; 77 78#define CHECK_LENGTH(v, len) do { \ 79 if ((v) < (len)) \ 80 errx(EX_DATAERR, "Rule too long"); \ 81 } while (0) 82/* 83 * Check if we have enough space in cmd buffer. Note that since 84 * first 8? u32 words are reserved by reserved header, full cmd 85 * buffer can't be used, so we need to protect from buffer overrun 86 * only. At the beginning, cblen is less than actual buffer size by 87 * size of ipfw_insn_u32 instruction + 1 u32 work. This eliminates need 88 * for checking small instructions fitting in given range. 89 * We also (ab)use the fact that ipfw_insn is always the first field 90 * for any custom instruction. 91 */ 92#define CHECK_CMDLEN CHECK_LENGTH(cblen, F_LEN((ipfw_insn *)cmd)) 93 94#define GET_UINT_ARG(arg, min, max, tok, s_x) do { \ 95 if (!av[0]) \ 96 errx(EX_USAGE, "%s: missing argument", match_value(s_x, tok)); \ 97 if (_substrcmp(*av, "tablearg") == 0) { \ 98 arg = IP_FW_TARG; \ 99 break; \ 100 } \ 101 \ 102 { \ 103 long _xval; \ 104 char *end; \ 105 \ 106 _xval = strtol(*av, &end, 10); \ 107 \ 108 if (!isdigit(**av) || *end != '\0' || (_xval == 0 && errno == EINVAL)) \ 109 errx(EX_DATAERR, "%s: invalid argument: %s", \ 110 match_value(s_x, tok), *av); \ 111 \ 112 if (errno == ERANGE || _xval < min || _xval > max) \ 113 errx(EX_DATAERR, "%s: argument is out of range (%u..%u): %s", \ 114 match_value(s_x, tok), min, max, *av); \ 115 \ 116 if (_xval == IP_FW_TARG) \ 117 errx(EX_DATAERR, "%s: illegal argument value: %s", \ 118 match_value(s_x, tok), *av); \ 119 arg = _xval; \ 120 } \ 121} while (0) 122 123static struct _s_x f_tcpflags[] = { 124 { "syn", TH_SYN }, 125 { "fin", TH_FIN }, 126 { "ack", TH_ACK }, 127 { "psh", TH_PUSH }, 128 { "rst", TH_RST }, 129 { "urg", TH_URG }, 130 { "tcp flag", 0 }, 131 { NULL, 0 } 132}; 133 134static struct _s_x f_tcpopts[] = { 135 { "mss", IP_FW_TCPOPT_MSS }, 136 { "maxseg", IP_FW_TCPOPT_MSS }, 137 { "window", IP_FW_TCPOPT_WINDOW }, 138 { "sack", IP_FW_TCPOPT_SACK }, 139 { "ts", IP_FW_TCPOPT_TS }, 140 { "timestamp", IP_FW_TCPOPT_TS }, 141 { "cc", IP_FW_TCPOPT_CC }, 142 { "tcp option", 0 }, 143 { NULL, 0 } 144}; 145 146/* 147 * IP options span the range 0 to 255 so we need to remap them 148 * (though in fact only the low 5 bits are significant). 149 */ 150static struct _s_x f_ipopts[] = { 151 { "ssrr", IP_FW_IPOPT_SSRR}, 152 { "lsrr", IP_FW_IPOPT_LSRR}, 153 { "rr", IP_FW_IPOPT_RR}, 154 { "ts", IP_FW_IPOPT_TS}, 155 { "ip option", 0 }, 156 { NULL, 0 } 157}; 158 159static struct _s_x f_iptos[] = { 160 { "lowdelay", IPTOS_LOWDELAY}, 161 { "throughput", IPTOS_THROUGHPUT}, 162 { "reliability", IPTOS_RELIABILITY}, 163 { "mincost", IPTOS_MINCOST}, 164 { "congestion", IPTOS_ECN_CE}, 165 { "ecntransport", IPTOS_ECN_ECT0}, 166 { "ip tos option", 0}, 167 { NULL, 0 } 168}; 169 170struct _s_x f_ipdscp[] = { 171 { "af11", IPTOS_DSCP_AF11 >> 2 }, /* 001010 */ 172 { "af12", IPTOS_DSCP_AF12 >> 2 }, /* 001100 */ 173 { "af13", IPTOS_DSCP_AF13 >> 2 }, /* 001110 */ 174 { "af21", IPTOS_DSCP_AF21 >> 2 }, /* 010010 */ 175 { "af22", IPTOS_DSCP_AF22 >> 2 }, /* 010100 */ 176 { "af23", IPTOS_DSCP_AF23 >> 2 }, /* 010110 */ 177 { "af31", IPTOS_DSCP_AF31 >> 2 }, /* 011010 */ 178 { "af32", IPTOS_DSCP_AF32 >> 2 }, /* 011100 */ 179 { "af33", IPTOS_DSCP_AF33 >> 2 }, /* 011110 */ 180 { "af41", IPTOS_DSCP_AF41 >> 2 }, /* 100010 */ 181 { "af42", IPTOS_DSCP_AF42 >> 2 }, /* 100100 */ 182 { "af43", IPTOS_DSCP_AF43 >> 2 }, /* 100110 */ 183 { "be", IPTOS_DSCP_CS0 >> 2 }, /* 000000 */ 184 { "ef", IPTOS_DSCP_EF >> 2 }, /* 101110 */ 185 { "cs0", IPTOS_DSCP_CS0 >> 2 }, /* 000000 */ 186 { "cs1", IPTOS_DSCP_CS1 >> 2 }, /* 001000 */ 187 { "cs2", IPTOS_DSCP_CS2 >> 2 }, /* 010000 */ 188 { "cs3", IPTOS_DSCP_CS3 >> 2 }, /* 011000 */ 189 { "cs4", IPTOS_DSCP_CS4 >> 2 }, /* 100000 */ 190 { "cs5", IPTOS_DSCP_CS5 >> 2 }, /* 101000 */ 191 { "cs6", IPTOS_DSCP_CS6 >> 2 }, /* 110000 */ 192 { "cs7", IPTOS_DSCP_CS7 >> 2 }, /* 100000 */ 193 { NULL, 0 } 194}; 195 196static struct _s_x limit_masks[] = { 197 {"all", DYN_SRC_ADDR|DYN_SRC_PORT|DYN_DST_ADDR|DYN_DST_PORT}, 198 {"src-addr", DYN_SRC_ADDR}, 199 {"src-port", DYN_SRC_PORT}, 200 {"dst-addr", DYN_DST_ADDR}, 201 {"dst-port", DYN_DST_PORT}, 202 {NULL, 0} 203}; 204 205/* 206 * we use IPPROTO_ETHERTYPE as a fake protocol id to call the print routines 207 * This is only used in this code. 208 */ 209#define IPPROTO_ETHERTYPE 0x1000 210static struct _s_x ether_types[] = { 211 /* 212 * Note, we cannot use "-:&/" in the names because they are field 213 * separators in the type specifications. Also, we use s = NULL as 214 * end-delimiter, because a type of 0 can be legal. 215 */ 216 { "ip", 0x0800 }, 217 { "ipv4", 0x0800 }, 218 { "ipv6", 0x86dd }, 219 { "arp", 0x0806 }, 220 { "rarp", 0x8035 }, 221 { "vlan", 0x8100 }, 222 { "loop", 0x9000 }, 223 { "trail", 0x1000 }, 224 { "at", 0x809b }, 225 { "atalk", 0x809b }, 226 { "aarp", 0x80f3 }, 227 { "pppoe_disc", 0x8863 }, 228 { "pppoe_sess", 0x8864 }, 229 { "ipx_8022", 0x00E0 }, 230 { "ipx_8023", 0x0000 }, 231 { "ipx_ii", 0x8137 }, 232 { "ipx_snap", 0x8137 }, 233 { "ipx", 0x8137 }, 234 { "ns", 0x0600 }, 235 { NULL, 0 } 236}; 237 238static struct _s_x rule_eactions[] = { 239 { "nat64lsn", TOK_NAT64LSN }, 240 { "nat64stl", TOK_NAT64STL }, 241 { "nptv6", TOK_NPTV6 }, 242 { "tcp-setmss", TOK_TCPSETMSS }, 243 { NULL, 0 } /* terminator */ 244}; 245 246static struct _s_x rule_actions[] = { 247 { "accept", TOK_ACCEPT }, 248 { "pass", TOK_ACCEPT }, 249 { "allow", TOK_ACCEPT }, 250 { "permit", TOK_ACCEPT }, 251 { "count", TOK_COUNT }, 252 { "pipe", TOK_PIPE }, 253 { "queue", TOK_QUEUE }, 254 { "divert", TOK_DIVERT }, 255 { "tee", TOK_TEE }, 256 { "netgraph", TOK_NETGRAPH }, 257 { "ngtee", TOK_NGTEE }, 258 { "fwd", TOK_FORWARD }, 259 { "forward", TOK_FORWARD }, 260 { "skipto", TOK_SKIPTO }, 261 { "deny", TOK_DENY }, 262 { "drop", TOK_DENY }, 263 { "reject", TOK_REJECT }, 264 { "reset6", TOK_RESET6 }, 265 { "reset", TOK_RESET }, 266 { "unreach6", TOK_UNREACH6 }, 267 { "unreach", TOK_UNREACH }, 268 { "check-state", TOK_CHECKSTATE }, 269 { "//", TOK_COMMENT }, 270 { "nat", TOK_NAT }, 271 { "reass", TOK_REASS }, 272 { "setfib", TOK_SETFIB }, 273 { "setdscp", TOK_SETDSCP }, 274 { "call", TOK_CALL }, 275 { "return", TOK_RETURN }, 276 { "eaction", TOK_EACTION }, 277 { "tcp-setmss", TOK_TCPSETMSS }, 278 { NULL, 0 } /* terminator */ 279}; 280 281static struct _s_x rule_action_params[] = { 282 { "altq", TOK_ALTQ }, 283 { "log", TOK_LOG }, 284 { "tag", TOK_TAG }, 285 { "untag", TOK_UNTAG }, 286 { NULL, 0 } /* terminator */ 287}; 288 289/* 290 * The 'lookup' instruction accepts one of the following arguments. 291 * -1 is a terminator for the list. 292 * Arguments are passed as v[1] in O_DST_LOOKUP options. 293 */ 294static int lookup_key[] = { 295 TOK_DSTIP, TOK_SRCIP, TOK_DSTPORT, TOK_SRCPORT, 296 TOK_UID, TOK_JAIL, TOK_DSCP, -1 }; 297 298static struct _s_x rule_options[] = { 299 { "tagged", TOK_TAGGED }, 300 { "uid", TOK_UID }, 301 { "gid", TOK_GID }, 302 { "jail", TOK_JAIL }, 303 { "in", TOK_IN }, 304 { "limit", TOK_LIMIT }, 305 { "keep-state", TOK_KEEPSTATE }, 306 { "bridged", TOK_LAYER2 }, 307 { "layer2", TOK_LAYER2 }, 308 { "out", TOK_OUT }, 309 { "diverted", TOK_DIVERTED }, 310 { "diverted-loopback", TOK_DIVERTEDLOOPBACK }, 311 { "diverted-output", TOK_DIVERTEDOUTPUT }, 312 { "xmit", TOK_XMIT }, 313 { "recv", TOK_RECV }, 314 { "via", TOK_VIA }, 315 { "fragment", TOK_FRAG }, 316 { "frag", TOK_FRAG }, 317 { "fib", TOK_FIB }, 318 { "ipoptions", TOK_IPOPTS }, 319 { "ipopts", TOK_IPOPTS }, 320 { "iplen", TOK_IPLEN }, 321 { "ipid", TOK_IPID }, 322 { "ipprecedence", TOK_IPPRECEDENCE }, 323 { "dscp", TOK_DSCP }, 324 { "iptos", TOK_IPTOS }, 325 { "ipttl", TOK_IPTTL }, 326 { "ipversion", TOK_IPVER }, 327 { "ipver", TOK_IPVER }, 328 { "estab", TOK_ESTAB }, 329 { "established", TOK_ESTAB }, 330 { "setup", TOK_SETUP }, 331 { "sockarg", TOK_SOCKARG }, 332 { "tcpdatalen", TOK_TCPDATALEN }, 333 { "tcpflags", TOK_TCPFLAGS }, 334 { "tcpflgs", TOK_TCPFLAGS }, 335 { "tcpoptions", TOK_TCPOPTS }, 336 { "tcpopts", TOK_TCPOPTS }, 337 { "tcpseq", TOK_TCPSEQ }, 338 { "tcpack", TOK_TCPACK }, 339 { "tcpwin", TOK_TCPWIN }, 340 { "icmptype", TOK_ICMPTYPES }, 341 { "icmptypes", TOK_ICMPTYPES }, 342 { "dst-ip", TOK_DSTIP }, 343 { "src-ip", TOK_SRCIP }, 344 { "dst-port", TOK_DSTPORT }, 345 { "src-port", TOK_SRCPORT }, 346 { "proto", TOK_PROTO }, 347 { "MAC", TOK_MAC }, 348 { "mac", TOK_MAC }, 349 { "mac-type", TOK_MACTYPE }, 350 { "verrevpath", TOK_VERREVPATH }, 351 { "versrcreach", TOK_VERSRCREACH }, 352 { "antispoof", TOK_ANTISPOOF }, 353 { "ipsec", TOK_IPSEC }, 354 { "icmp6type", TOK_ICMP6TYPES }, 355 { "icmp6types", TOK_ICMP6TYPES }, 356 { "ext6hdr", TOK_EXT6HDR}, 357 { "flow-id", TOK_FLOWID}, 358 { "ipv6", TOK_IPV6}, 359 { "ip6", TOK_IPV6}, 360 { "ipv4", TOK_IPV4}, 361 { "ip4", TOK_IPV4}, 362 { "dst-ipv6", TOK_DSTIP6}, 363 { "dst-ip6", TOK_DSTIP6}, 364 { "src-ipv6", TOK_SRCIP6}, 365 { "src-ip6", TOK_SRCIP6}, 366 { "lookup", TOK_LOOKUP}, 367 { "flow", TOK_FLOW}, 368 { "//", TOK_COMMENT }, 369 370 { "not", TOK_NOT }, /* pseudo option */ 371 { "!", /* escape ? */ TOK_NOT }, /* pseudo option */ 372 { "or", TOK_OR }, /* pseudo option */ 373 { "|", /* escape */ TOK_OR }, /* pseudo option */ 374 { "{", TOK_STARTBRACE }, /* pseudo option */ 375 { "(", TOK_STARTBRACE }, /* pseudo option */ 376 { "}", TOK_ENDBRACE }, /* pseudo option */ 377 { ")", TOK_ENDBRACE }, /* pseudo option */ 378 { NULL, 0 } /* terminator */ 379}; 380 381void bprint_uint_arg(struct buf_pr *bp, const char *str, uint32_t arg); 382static int ipfw_get_config(struct cmdline_opts *co, struct format_opts *fo, 383 ipfw_cfg_lheader **pcfg, size_t *psize); 384static int ipfw_show_config(struct cmdline_opts *co, struct format_opts *fo, 385 ipfw_cfg_lheader *cfg, size_t sz, int ac, char **av); 386static void ipfw_list_tifaces(void); 387 388struct tidx; 389static uint16_t pack_object(struct tidx *tstate, char *name, int otype); 390static uint16_t pack_table(struct tidx *tstate, char *name); 391 392static char *table_search_ctlv(ipfw_obj_ctlv *ctlv, uint16_t idx); 393static void object_sort_ctlv(ipfw_obj_ctlv *ctlv); 394static char *object_search_ctlv(ipfw_obj_ctlv *ctlv, uint16_t idx, 395 uint16_t type); 396 397/* 398 * Simple string buffer API. 399 * Used to simplify buffer passing between function and for 400 * transparent overrun handling. 401 */ 402 403/* 404 * Allocates new buffer of given size @sz. 405 * 406 * Returns 0 on success. 407 */ 408int 409bp_alloc(struct buf_pr *b, size_t size) 410{ 411 memset(b, 0, sizeof(struct buf_pr)); 412 413 if ((b->buf = calloc(1, size)) == NULL) 414 return (ENOMEM); 415 416 b->ptr = b->buf; 417 b->size = size; 418 b->avail = b->size; 419 420 return (0); 421} 422 423void 424bp_free(struct buf_pr *b) 425{ 426 427 free(b->buf); 428} 429 430/* 431 * Flushes buffer so new writer start from beginning. 432 */ 433void 434bp_flush(struct buf_pr *b) 435{ 436 437 b->ptr = b->buf; 438 b->avail = b->size; 439 b->buf[0] = '\0'; 440} 441 442/* 443 * Print message specified by @format and args. 444 * Automatically manage buffer space and transparently handle 445 * buffer overruns. 446 * 447 * Returns number of bytes that should have been printed. 448 */ 449int 450bprintf(struct buf_pr *b, char *format, ...) 451{ 452 va_list args; 453 int i; 454 455 va_start(args, format); 456 457 i = vsnprintf(b->ptr, b->avail, format, args); 458 va_end(args); 459 460 if (i > b->avail || i < 0) { 461 /* Overflow or print error */ 462 b->avail = 0; 463 } else { 464 b->ptr += i; 465 b->avail -= i; 466 } 467 468 b->needed += i; 469 470 return (i); 471} 472 473/* 474 * Special values printer for tablearg-aware opcodes. 475 */ 476void 477bprint_uint_arg(struct buf_pr *bp, const char *str, uint32_t arg) 478{ 479 480 if (str != NULL) 481 bprintf(bp, "%s", str); 482 if (arg == IP_FW_TARG) 483 bprintf(bp, "tablearg"); 484 else 485 bprintf(bp, "%u", arg); 486} 487 488/* 489 * Helper routine to print a possibly unaligned uint64_t on 490 * various platform. If width > 0, print the value with 491 * the desired width, followed by a space; 492 * otherwise, return the required width. 493 */ 494int 495pr_u64(struct buf_pr *b, uint64_t *pd, int width) 496{ 497#ifdef TCC 498#define U64_FMT "I64" 499#else 500#define U64_FMT "llu" 501#endif 502 uint64_t u; 503 unsigned long long d; 504 505 bcopy (pd, &u, sizeof(u)); 506 d = u; 507 return (width > 0) ? 508 bprintf(b, "%*" U64_FMT " ", width, d) : 509 snprintf(NULL, 0, "%" U64_FMT, d) ; 510#undef U64_FMT 511} 512 513 514void * 515safe_calloc(size_t number, size_t size) 516{ 517 void *ret = calloc(number, size); 518 519 if (ret == NULL) 520 err(EX_OSERR, "calloc"); 521 return ret; 522} 523 524void * 525safe_realloc(void *ptr, size_t size) 526{ 527 void *ret = realloc(ptr, size); 528 529 if (ret == NULL) 530 err(EX_OSERR, "realloc"); 531 return ret; 532} 533 534/* 535 * Compare things like interface or table names. 536 */ 537int 538stringnum_cmp(const char *a, const char *b) 539{ 540 int la, lb; 541 542 la = strlen(a); 543 lb = strlen(b); 544 545 if (la > lb) 546 return (1); 547 else if (la < lb) 548 return (-01); 549 550 return (strcmp(a, b)); 551} 552 553 554/* 555 * conditionally runs the command. 556 * Selected options or negative -> getsockopt 557 */ 558int 559do_cmd(int optname, void *optval, uintptr_t optlen) 560{ 561 int i; 562 563 if (co.test_only) 564 return 0; 565 566 if (ipfw_socket == -1) 567 ipfw_socket = socket(AF_INET, SOCK_RAW, IPPROTO_RAW); 568 if (ipfw_socket < 0) 569 err(EX_UNAVAILABLE, "socket"); 570 571 if (optname == IP_FW_GET || optname == IP_DUMMYNET_GET || 572 optname == IP_FW_ADD || optname == IP_FW3 || 573 optname == IP_FW_NAT_GET_CONFIG || 574 optname < 0 || 575 optname == IP_FW_NAT_GET_LOG) { 576 if (optname < 0) 577 optname = -optname; 578 i = getsockopt(ipfw_socket, IPPROTO_IP, optname, optval, 579 (socklen_t *)optlen); 580 } else { 581 i = setsockopt(ipfw_socket, IPPROTO_IP, optname, optval, optlen); 582 } 583 return i; 584} 585 586/* 587 * do_set3 - pass ipfw control cmd to kernel 588 * @optname: option name 589 * @optval: pointer to option data 590 * @optlen: option length 591 * 592 * Assumes op3 header is already embedded. 593 * Calls setsockopt() with IP_FW3 as kernel-visible opcode. 594 * Returns 0 on success or errno otherwise. 595 */ 596int 597do_set3(int optname, ip_fw3_opheader *op3, size_t optlen) 598{ 599 600 if (co.test_only) 601 return (0); 602 603 if (ipfw_socket == -1) 604 ipfw_socket = socket(AF_INET, SOCK_RAW, IPPROTO_RAW); 605 if (ipfw_socket < 0) 606 err(EX_UNAVAILABLE, "socket"); 607 608 op3->opcode = optname; 609 610 return (setsockopt(ipfw_socket, IPPROTO_IP, IP_FW3, op3, optlen)); 611} 612 613/* 614 * do_get3 - pass ipfw control cmd to kernel 615 * @optname: option name 616 * @optval: pointer to option data 617 * @optlen: pointer to option length 618 * 619 * Assumes op3 header is already embedded. 620 * Calls getsockopt() with IP_FW3 as kernel-visible opcode. 621 * Returns 0 on success or errno otherwise. 622 */ 623int 624do_get3(int optname, ip_fw3_opheader *op3, size_t *optlen) 625{ 626 int error; 627 socklen_t len; 628 629 if (co.test_only) 630 return (0); 631 632 if (ipfw_socket == -1) 633 ipfw_socket = socket(AF_INET, SOCK_RAW, IPPROTO_RAW); 634 if (ipfw_socket < 0) 635 err(EX_UNAVAILABLE, "socket"); 636 637 op3->opcode = optname; 638 639 len = *optlen; 640 error = getsockopt(ipfw_socket, IPPROTO_IP, IP_FW3, op3, &len); 641 *optlen = len; 642 643 return (error); 644} 645 646/** 647 * match_token takes a table and a string, returns the value associated 648 * with the string (-1 in case of failure). 649 */ 650int 651match_token(struct _s_x *table, const char *string) 652{ 653 struct _s_x *pt; 654 uint i = strlen(string); 655 656 for (pt = table ; i && pt->s != NULL ; pt++) 657 if (strlen(pt->s) == i && !bcmp(string, pt->s, i)) 658 return pt->x; 659 return (-1); 660} 661 662/** 663 * match_token_relaxed takes a table and a string, returns the value associated 664 * with the string for the best match. 665 * 666 * Returns: 667 * value from @table for matched records 668 * -1 for non-matched records 669 * -2 if more than one records match @string. 670 */ 671int 672match_token_relaxed(struct _s_x *table, const char *string) 673{ 674 struct _s_x *pt, *m; 675 int i, c; 676 677 i = strlen(string); 678 c = 0; 679 680 for (pt = table ; i != 0 && pt->s != NULL ; pt++) { 681 if (strncmp(pt->s, string, i) != 0) 682 continue; 683 m = pt; 684 c++; 685 } 686 687 if (c == 1) 688 return (m->x); 689 690 return (c > 0 ? -2: -1); 691} 692 693int 694get_token(struct _s_x *table, const char *string, const char *errbase) 695{ 696 int tcmd; 697 698 if ((tcmd = match_token_relaxed(table, string)) < 0) 699 errx(EX_USAGE, "%s %s %s", 700 (tcmd == 0) ? "invalid" : "ambiguous", errbase, string); 701 702 return (tcmd); 703} 704 705/** 706 * match_value takes a table and a value, returns the string associated 707 * with the value (NULL in case of failure). 708 */ 709char const * 710match_value(struct _s_x *p, int value) 711{ 712 for (; p->s != NULL; p++) 713 if (p->x == value) 714 return p->s; 715 return NULL; 716} 717 718size_t 719concat_tokens(char *buf, size_t bufsize, struct _s_x *table, char *delimiter) 720{ 721 struct _s_x *pt; 722 int l; 723 size_t sz; 724 725 for (sz = 0, pt = table ; pt->s != NULL; pt++) { 726 l = snprintf(buf + sz, bufsize - sz, "%s%s", 727 (sz == 0) ? "" : delimiter, pt->s); 728 sz += l; 729 bufsize += l; 730 if (sz > bufsize) 731 return (bufsize); 732 } 733 734 return (sz); 735} 736 737/* 738 * helper function to process a set of flags and set bits in the 739 * appropriate masks. 740 */ 741int 742fill_flags(struct _s_x *flags, char *p, char **e, uint32_t *set, 743 uint32_t *clear) 744{ 745 char *q; /* points to the separator */ 746 int val; 747 uint32_t *which; /* mask we are working on */ 748 749 while (p && *p) { 750 if (*p == '!') { 751 p++; 752 which = clear; 753 } else 754 which = set; 755 q = strchr(p, ','); 756 if (q) 757 *q++ = '\0'; 758 val = match_token(flags, p); 759 if (val <= 0) { 760 if (e != NULL) 761 *e = p; 762 return (-1); 763 } 764 *which |= (uint32_t)val; 765 p = q; 766 } 767 return (0); 768} 769 770void 771print_flags_buffer(char *buf, size_t sz, struct _s_x *list, uint32_t set) 772{ 773 char const *comma = ""; 774 int i, l; 775 776 for (i = 0; list[i].x != 0; i++) { 777 if ((set & list[i].x) == 0) 778 continue; 779 780 set &= ~list[i].x; 781 l = snprintf(buf, sz, "%s%s", comma, list[i].s); 782 if (l >= sz) 783 return; 784 comma = ","; 785 buf += l; 786 sz -=l; 787 } 788} 789 790/* 791 * _substrcmp takes two strings and returns 1 if they do not match, 792 * and 0 if they match exactly or the first string is a sub-string 793 * of the second. A warning is printed to stderr in the case that the 794 * first string is a sub-string of the second. 795 * 796 * This function will be removed in the future through the usual 797 * deprecation process. 798 */ 799int 800_substrcmp(const char *str1, const char* str2) 801{ 802 803 if (strncmp(str1, str2, strlen(str1)) != 0) 804 return 1; 805 806 if (strlen(str1) != strlen(str2)) 807 warnx("DEPRECATED: '%s' matched '%s' as a sub-string", 808 str1, str2); 809 return 0; 810} 811 812/* 813 * _substrcmp2 takes three strings and returns 1 if the first two do not match, 814 * and 0 if they match exactly or the second string is a sub-string 815 * of the first. A warning is printed to stderr in the case that the 816 * first string does not match the third. 817 * 818 * This function exists to warn about the bizarre construction 819 * strncmp(str, "by", 2) which is used to allow people to use a shortcut 820 * for "bytes". The problem is that in addition to accepting "by", 821 * "byt", "byte", and "bytes", it also excepts "by_rabid_dogs" and any 822 * other string beginning with "by". 823 * 824 * This function will be removed in the future through the usual 825 * deprecation process. 826 */ 827int 828_substrcmp2(const char *str1, const char* str2, const char* str3) 829{ 830 831 if (strncmp(str1, str2, strlen(str2)) != 0) 832 return 1; 833 834 if (strcmp(str1, str3) != 0) 835 warnx("DEPRECATED: '%s' matched '%s'", 836 str1, str3); 837 return 0; 838} 839 840/* 841 * prints one port, symbolic or numeric 842 */ 843static void 844print_port(struct buf_pr *bp, int proto, uint16_t port) 845{ 846 847 if (proto == IPPROTO_ETHERTYPE) { 848 char const *s; 849 850 if (co.do_resolv && (s = match_value(ether_types, port)) ) 851 bprintf(bp, "%s", s); 852 else 853 bprintf(bp, "0x%04x", port); 854 } else { 855 struct servent *se = NULL; 856 if (co.do_resolv) { 857 struct protoent *pe = getprotobynumber(proto); 858 859 se = getservbyport(htons(port), pe ? pe->p_name : NULL); 860 } 861 if (se) 862 bprintf(bp, "%s", se->s_name); 863 else 864 bprintf(bp, "%d", port); 865 } 866} 867 868static struct _s_x _port_name[] = { 869 {"dst-port", O_IP_DSTPORT}, 870 {"src-port", O_IP_SRCPORT}, 871 {"ipid", O_IPID}, 872 {"iplen", O_IPLEN}, 873 {"ipttl", O_IPTTL}, 874 {"mac-type", O_MAC_TYPE}, 875 {"tcpdatalen", O_TCPDATALEN}, 876 {"tcpwin", O_TCPWIN}, 877 {"tagged", O_TAGGED}, 878 {NULL, 0} 879}; 880 881/* 882 * Print the values in a list 16-bit items of the types above. 883 * XXX todo: add support for mask. 884 */ 885static void 886print_newports(struct buf_pr *bp, ipfw_insn_u16 *cmd, int proto, int opcode) 887{ 888 uint16_t *p = cmd->ports; 889 int i; 890 char const *sep; 891 892 if (opcode != 0) { 893 sep = match_value(_port_name, opcode); 894 if (sep == NULL) 895 sep = "???"; 896 bprintf(bp, " %s", sep); 897 } 898 sep = " "; 899 for (i = F_LEN((ipfw_insn *)cmd) - 1; i > 0; i--, p += 2) { 900 bprintf(bp, "%s", sep); 901 print_port(bp, proto, p[0]); 902 if (p[0] != p[1]) { 903 bprintf(bp, "-"); 904 print_port(bp, proto, p[1]); 905 } 906 sep = ","; 907 } 908} 909 910/* 911 * Like strtol, but also translates service names into port numbers 912 * for some protocols. 913 * In particular: 914 * proto == -1 disables the protocol check; 915 * proto == IPPROTO_ETHERTYPE looks up an internal table 916 * proto == <some value in /etc/protocols> matches the values there. 917 * Returns *end == s in case the parameter is not found. 918 */ 919static int 920strtoport(char *s, char **end, int base, int proto) 921{ 922 char *p, *buf; 923 char *s1; 924 int i; 925 926 *end = s; /* default - not found */ 927 if (*s == '\0') 928 return 0; /* not found */ 929 930 if (isdigit(*s)) 931 return strtol(s, end, base); 932 933 /* 934 * find separator. '\\' escapes the next char. 935 */ 936 for (s1 = s; *s1 && (isalnum(*s1) || *s1 == '\\') ; s1++) 937 if (*s1 == '\\' && s1[1] != '\0') 938 s1++; 939 940 buf = safe_calloc(s1 - s + 1, 1); 941 942 /* 943 * copy into a buffer skipping backslashes 944 */ 945 for (p = s, i = 0; p != s1 ; p++) 946 if (*p != '\\') 947 buf[i++] = *p; 948 buf[i++] = '\0'; 949 950 if (proto == IPPROTO_ETHERTYPE) { 951 i = match_token(ether_types, buf); 952 free(buf); 953 if (i != -1) { /* found */ 954 *end = s1; 955 return i; 956 } 957 } else { 958 struct protoent *pe = NULL; 959 struct servent *se; 960 961 if (proto != 0) 962 pe = getprotobynumber(proto); 963 setservent(1); 964 se = getservbyname(buf, pe ? pe->p_name : NULL); 965 free(buf); 966 if (se != NULL) { 967 *end = s1; 968 return ntohs(se->s_port); 969 } 970 } 971 return 0; /* not found */ 972} 973 974/* 975 * Fill the body of the command with the list of port ranges. 976 */ 977static int 978fill_newports(ipfw_insn_u16 *cmd, char *av, int proto, int cblen) 979{ 980 uint16_t a, b, *p = cmd->ports; 981 int i = 0; 982 char *s = av; 983 984 while (*s) { 985 a = strtoport(av, &s, 0, proto); 986 if (s == av) /* empty or invalid argument */ 987 return (0); 988 989 CHECK_LENGTH(cblen, i + 2); 990 991 switch (*s) { 992 case '-': /* a range */ 993 av = s + 1; 994 b = strtoport(av, &s, 0, proto); 995 /* Reject expressions like '1-abc' or '1-2-3'. */ 996 if (s == av || (*s != ',' && *s != '\0')) 997 return (0); 998 p[0] = a; 999 p[1] = b; 1000 break; 1001 case ',': /* comma separated list */ 1002 case '\0': 1003 p[0] = p[1] = a; 1004 break; 1005 default: 1006 warnx("port list: invalid separator <%c> in <%s>", 1007 *s, av); 1008 return (0); 1009 } 1010 1011 i++; 1012 p += 2; 1013 av = s + 1; 1014 } 1015 if (i > 0) { 1016 if (i + 1 > F_LEN_MASK) 1017 errx(EX_DATAERR, "too many ports/ranges\n"); 1018 cmd->o.len |= i + 1; /* leave F_NOT and F_OR untouched */ 1019 } 1020 return (i); 1021} 1022 1023/* 1024 * Fill the body of the command with the list of DiffServ codepoints. 1025 */ 1026static void 1027fill_dscp(ipfw_insn *cmd, char *av, int cblen) 1028{ 1029 uint32_t *low, *high; 1030 char *s = av, *a; 1031 int code; 1032 1033 cmd->opcode = O_DSCP; 1034 cmd->len |= F_INSN_SIZE(ipfw_insn_u32) + 1; 1035 1036 CHECK_CMDLEN; 1037 1038 low = (uint32_t *)(cmd + 1); 1039 high = low + 1; 1040 1041 *low = 0; 1042 *high = 0; 1043 1044 while (s != NULL) { 1045 a = strchr(s, ','); 1046 1047 if (a != NULL) 1048 *a++ = '\0'; 1049 1050 if (isalpha(*s)) { 1051 if ((code = match_token(f_ipdscp, s)) == -1) 1052 errx(EX_DATAERR, "Unknown DSCP code"); 1053 } else { 1054 code = strtoul(s, NULL, 10); 1055 if (code < 0 || code > 63) 1056 errx(EX_DATAERR, "Invalid DSCP value"); 1057 } 1058 1059 if (code >= 32) 1060 *high |= 1 << (code - 32); 1061 else 1062 *low |= 1 << code; 1063 1064 s = a; 1065 } 1066} 1067 1068static struct _s_x icmpcodes[] = { 1069 { "net", ICMP_UNREACH_NET }, 1070 { "host", ICMP_UNREACH_HOST }, 1071 { "protocol", ICMP_UNREACH_PROTOCOL }, 1072 { "port", ICMP_UNREACH_PORT }, 1073 { "needfrag", ICMP_UNREACH_NEEDFRAG }, 1074 { "srcfail", ICMP_UNREACH_SRCFAIL }, 1075 { "net-unknown", ICMP_UNREACH_NET_UNKNOWN }, 1076 { "host-unknown", ICMP_UNREACH_HOST_UNKNOWN }, 1077 { "isolated", ICMP_UNREACH_ISOLATED }, 1078 { "net-prohib", ICMP_UNREACH_NET_PROHIB }, 1079 { "host-prohib", ICMP_UNREACH_HOST_PROHIB }, 1080 { "tosnet", ICMP_UNREACH_TOSNET }, 1081 { "toshost", ICMP_UNREACH_TOSHOST }, 1082 { "filter-prohib", ICMP_UNREACH_FILTER_PROHIB }, 1083 { "host-precedence", ICMP_UNREACH_HOST_PRECEDENCE }, 1084 { "precedence-cutoff", ICMP_UNREACH_PRECEDENCE_CUTOFF }, 1085 { NULL, 0 } 1086}; 1087 1088static void 1089fill_reject_code(u_short *codep, char *str) 1090{ 1091 int val; 1092 char *s; 1093 1094 val = strtoul(str, &s, 0); 1095 if (s == str || *s != '\0' || val >= 0x100) 1096 val = match_token(icmpcodes, str); 1097 if (val < 0) 1098 errx(EX_DATAERR, "unknown ICMP unreachable code ``%s''", str); 1099 *codep = val; 1100 return; 1101} 1102 1103static void 1104print_reject_code(struct buf_pr *bp, uint16_t code) 1105{ 1106 char const *s; 1107 1108 if ((s = match_value(icmpcodes, code)) != NULL) 1109 bprintf(bp, "unreach %s", s); 1110 else 1111 bprintf(bp, "unreach %u", code); 1112} 1113 1114/* 1115 * Returns the number of bits set (from left) in a contiguous bitmask, 1116 * or -1 if the mask is not contiguous. 1117 * XXX this needs a proper fix. 1118 * This effectively works on masks in big-endian (network) format. 1119 * when compiled on little endian architectures. 1120 * 1121 * First bit is bit 7 of the first byte -- note, for MAC addresses, 1122 * the first bit on the wire is bit 0 of the first byte. 1123 * len is the max length in bits. 1124 */ 1125int 1126contigmask(uint8_t *p, int len) 1127{ 1128 int i, n; 1129 1130 for (i=0; i<len ; i++) 1131 if ( (p[i/8] & (1 << (7 - (i%8)))) == 0) /* first bit unset */ 1132 break; 1133 for (n=i+1; n < len; n++) 1134 if ( (p[n/8] & (1 << (7 - (n%8)))) != 0) 1135 return -1; /* mask not contiguous */ 1136 return i; 1137} 1138 1139/* 1140 * print flags set/clear in the two bitmasks passed as parameters. 1141 * There is a specialized check for f_tcpflags. 1142 */ 1143static void 1144print_flags(struct buf_pr *bp, char const *name, ipfw_insn *cmd, 1145 struct _s_x *list) 1146{ 1147 char const *comma = ""; 1148 int i; 1149 uint8_t set = cmd->arg1 & 0xff; 1150 uint8_t clear = (cmd->arg1 >> 8) & 0xff; 1151 1152 if (list == f_tcpflags && set == TH_SYN && clear == TH_ACK) { 1153 bprintf(bp, " setup"); 1154 return; 1155 } 1156 1157 bprintf(bp, " %s ", name); 1158 for (i=0; list[i].x != 0; i++) { 1159 if (set & list[i].x) { 1160 set &= ~list[i].x; 1161 bprintf(bp, "%s%s", comma, list[i].s); 1162 comma = ","; 1163 } 1164 if (clear & list[i].x) { 1165 clear &= ~list[i].x; 1166 bprintf(bp, "%s!%s", comma, list[i].s); 1167 comma = ","; 1168 } 1169 } 1170} 1171 1172 1173/* 1174 * Print the ip address contained in a command. 1175 */ 1176static void 1177print_ip(struct buf_pr *bp, struct format_opts *fo, ipfw_insn_ip *cmd, 1178 char const *s) 1179{ 1180 struct hostent *he = NULL; 1181 struct in_addr *ia; 1182 uint32_t len = F_LEN((ipfw_insn *)cmd); 1183 uint32_t *a = ((ipfw_insn_u32 *)cmd)->d; 1184 char *t; 1185 1186 if (cmd->o.opcode == O_IP_DST_LOOKUP && len > F_INSN_SIZE(ipfw_insn_u32)) { 1187 uint32_t d = a[1]; 1188 const char *arg = "<invalid>"; 1189 1190 if (d < sizeof(lookup_key)/sizeof(lookup_key[0])) 1191 arg = match_value(rule_options, lookup_key[d]); 1192 t = table_search_ctlv(fo->tstate, ((ipfw_insn *)cmd)->arg1); 1193 bprintf(bp, "%s lookup %s %s", cmd->o.len & F_NOT ? " not": "", 1194 arg, t); 1195 return; 1196 } 1197 bprintf(bp, "%s%s ", cmd->o.len & F_NOT ? " not": "", s); 1198 1199 if (cmd->o.opcode == O_IP_SRC_ME || cmd->o.opcode == O_IP_DST_ME) { 1200 bprintf(bp, "me"); 1201 return; 1202 } 1203 if (cmd->o.opcode == O_IP_SRC_LOOKUP || 1204 cmd->o.opcode == O_IP_DST_LOOKUP) { 1205 t = table_search_ctlv(fo->tstate, ((ipfw_insn *)cmd)->arg1); 1206 bprintf(bp, "table(%s", t); 1207 if (len == F_INSN_SIZE(ipfw_insn_u32)) 1208 bprintf(bp, ",%u", *a); 1209 bprintf(bp, ")"); 1210 return; 1211 } 1212 if (cmd->o.opcode == O_IP_SRC_SET || cmd->o.opcode == O_IP_DST_SET) { 1213 uint32_t x, *map = (uint32_t *)&(cmd->mask); 1214 int i, j; 1215 char comma = '{'; 1216 1217 x = cmd->o.arg1 - 1; 1218 x = htonl( ~x ); 1219 cmd->addr.s_addr = htonl(cmd->addr.s_addr); 1220 bprintf(bp, "%s/%d", inet_ntoa(cmd->addr), 1221 contigmask((uint8_t *)&x, 32)); 1222 x = cmd->addr.s_addr = htonl(cmd->addr.s_addr); 1223 x &= 0xff; /* base */ 1224 /* 1225 * Print bits and ranges. 1226 * Locate first bit set (i), then locate first bit unset (j). 1227 * If we have 3+ consecutive bits set, then print them as a 1228 * range, otherwise only print the initial bit and rescan. 1229 */ 1230 for (i=0; i < cmd->o.arg1; i++) 1231 if (map[i/32] & (1<<(i & 31))) { 1232 for (j=i+1; j < cmd->o.arg1; j++) 1233 if (!(map[ j/32] & (1<<(j & 31)))) 1234 break; 1235 bprintf(bp, "%c%d", comma, i+x); 1236 if (j>i+2) { /* range has at least 3 elements */ 1237 bprintf(bp, "-%d", j-1+x); 1238 i = j-1; 1239 } 1240 comma = ','; 1241 } 1242 bprintf(bp, "}"); 1243 return; 1244 } 1245 /* 1246 * len == 2 indicates a single IP, whereas lists of 1 or more 1247 * addr/mask pairs have len = (2n+1). We convert len to n so we 1248 * use that to count the number of entries. 1249 */ 1250 for (len = len / 2; len > 0; len--, a += 2) { 1251 int mb = /* mask length */ 1252 (cmd->o.opcode == O_IP_SRC || cmd->o.opcode == O_IP_DST) ? 1253 32 : contigmask((uint8_t *)&(a[1]), 32); 1254 if (mb == 32 && co.do_resolv) 1255 he = gethostbyaddr((char *)&(a[0]), sizeof(u_long), AF_INET); 1256 if (he != NULL) /* resolved to name */ 1257 bprintf(bp, "%s", he->h_name); 1258 else if (mb == 0) /* any */ 1259 bprintf(bp, "any"); 1260 else { /* numeric IP followed by some kind of mask */ 1261 ia = (struct in_addr *)&a[0]; 1262 bprintf(bp, "%s", inet_ntoa(*ia)); 1263 if (mb < 0) { 1264 ia = (struct in_addr *)&a[1]; 1265 bprintf(bp, ":%s", inet_ntoa(*ia)); 1266 } else if (mb < 32) 1267 bprintf(bp, "/%d", mb); 1268 } 1269 if (len > 1) 1270 bprintf(bp, ","); 1271 } 1272} 1273 1274/* 1275 * prints a MAC address/mask pair 1276 */ 1277static void 1278print_mac(struct buf_pr *bp, uint8_t *addr, uint8_t *mask) 1279{ 1280 int l = contigmask(mask, 48); 1281 1282 if (l == 0) 1283 bprintf(bp, " any"); 1284 else { 1285 bprintf(bp, " %02x:%02x:%02x:%02x:%02x:%02x", 1286 addr[0], addr[1], addr[2], addr[3], addr[4], addr[5]); 1287 if (l == -1) 1288 bprintf(bp, "&%02x:%02x:%02x:%02x:%02x:%02x", 1289 mask[0], mask[1], mask[2], 1290 mask[3], mask[4], mask[5]); 1291 else if (l < 48) 1292 bprintf(bp, "/%d", l); 1293 } 1294} 1295 1296static void 1297fill_icmptypes(ipfw_insn_u32 *cmd, char *av) 1298{ 1299 uint8_t type; 1300 1301 cmd->d[0] = 0; 1302 while (*av) { 1303 if (*av == ',') 1304 av++; 1305 1306 type = strtoul(av, &av, 0); 1307 1308 if (*av != ',' && *av != '\0') 1309 errx(EX_DATAERR, "invalid ICMP type"); 1310 1311 if (type > 31) 1312 errx(EX_DATAERR, "ICMP type out of range"); 1313 1314 cmd->d[0] |= 1 << type; 1315 } 1316 cmd->o.opcode = O_ICMPTYPE; 1317 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32); 1318} 1319 1320static void 1321print_icmptypes(struct buf_pr *bp, ipfw_insn_u32 *cmd) 1322{ 1323 int i; 1324 char sep= ' '; 1325 1326 bprintf(bp, " icmptypes"); 1327 for (i = 0; i < 32; i++) { 1328 if ( (cmd->d[0] & (1 << (i))) == 0) 1329 continue; 1330 bprintf(bp, "%c%d", sep, i); 1331 sep = ','; 1332 } 1333} 1334 1335static void 1336print_dscp(struct buf_pr *bp, ipfw_insn_u32 *cmd) 1337{ 1338 int i = 0; 1339 uint32_t *v; 1340 char sep= ' '; 1341 const char *code; 1342 1343 bprintf(bp, " dscp"); 1344 v = cmd->d; 1345 while (i < 64) { 1346 if (*v & (1 << i)) { 1347 if ((code = match_value(f_ipdscp, i)) != NULL) 1348 bprintf(bp, "%c%s", sep, code); 1349 else 1350 bprintf(bp, "%c%d", sep, i); 1351 sep = ','; 1352 } 1353 1354 if ((++i % 32) == 0) 1355 v++; 1356 } 1357} 1358 1359/* 1360 * show_ipfw() prints the body of an ipfw rule. 1361 * Because the standard rule has at least proto src_ip dst_ip, we use 1362 * a helper function to produce these entries if not provided explicitly. 1363 * The first argument is the list of fields we have, the second is 1364 * the list of fields we want to be printed. 1365 * 1366 * Special cases if we have provided a MAC header: 1367 * + if the rule does not contain IP addresses/ports, do not print them; 1368 * + if the rule does not contain an IP proto, print "all" instead of "ip"; 1369 * 1370 * Once we have 'have_options', IP header fields are printed as options. 1371 */ 1372#define HAVE_PROTO 0x0001 1373#define HAVE_SRCIP 0x0002 1374#define HAVE_DSTIP 0x0004 1375#define HAVE_PROTO4 0x0008 1376#define HAVE_PROTO6 0x0010 1377#define HAVE_IP 0x0100 1378#define HAVE_OPTIONS 0x8000 1379 1380static void 1381show_prerequisites(struct buf_pr *bp, int *flags, int want, int cmd) 1382{ 1383 (void)cmd; /* UNUSED */ 1384 if (co.comment_only) 1385 return; 1386 if ( (*flags & HAVE_IP) == HAVE_IP) 1387 *flags |= HAVE_OPTIONS; 1388 1389 if ( !(*flags & HAVE_OPTIONS)) { 1390 if ( !(*flags & HAVE_PROTO) && (want & HAVE_PROTO)) { 1391 if ( (*flags & HAVE_PROTO4)) 1392 bprintf(bp, " ip4"); 1393 else if ( (*flags & HAVE_PROTO6)) 1394 bprintf(bp, " ip6"); 1395 else 1396 bprintf(bp, " ip"); 1397 } 1398 if ( !(*flags & HAVE_SRCIP) && (want & HAVE_SRCIP)) 1399 bprintf(bp, " from any"); 1400 if ( !(*flags & HAVE_DSTIP) && (want & HAVE_DSTIP)) 1401 bprintf(bp, " to any"); 1402 } 1403 *flags |= want; 1404} 1405 1406static void 1407show_static_rule(struct cmdline_opts *co, struct format_opts *fo, 1408 struct buf_pr *bp, struct ip_fw_rule *rule, struct ip_fw_bcounter *cntr) 1409{ 1410 static int twidth = 0; 1411 int l; 1412 ipfw_insn *cmd, *has_eaction = NULL, *tagptr = NULL; 1413 const char *comment = NULL; /* ptr to comment if we have one */ 1414 const char *ename; 1415 int proto = 0; /* default */ 1416 int flags = 0; /* prerequisites */ 1417 ipfw_insn_log *logptr = NULL; /* set if we find an O_LOG */ 1418 ipfw_insn_altq *altqptr = NULL; /* set if we find an O_ALTQ */ 1419 int or_block = 0; /* we are in an or block */ 1420 uint32_t uval; 1421 1422 if ((fo->set_mask & (1 << rule->set)) == 0) { 1423 /* disabled mask */ 1424 if (!co->show_sets) 1425 return; 1426 else 1427 bprintf(bp, "# DISABLED "); 1428 } 1429 bprintf(bp, "%05u ", rule->rulenum); 1430 1431 /* Print counters if enabled */ 1432 if (fo->pcwidth > 0 || fo->bcwidth > 0) { 1433 pr_u64(bp, &cntr->pcnt, fo->pcwidth); 1434 pr_u64(bp, &cntr->bcnt, fo->bcwidth); 1435 } 1436 1437 if (co->do_time == 2) 1438 bprintf(bp, "%10u ", cntr->timestamp); 1439 else if (co->do_time == 1) { 1440 char timestr[30]; 1441 time_t t = (time_t)0; 1442 1443 if (twidth == 0) { 1444 strcpy(timestr, ctime(&t)); 1445 *strchr(timestr, '\n') = '\0'; 1446 twidth = strlen(timestr); 1447 } 1448 if (cntr->timestamp > 0) { 1449 t = _long_to_time(cntr->timestamp); 1450 1451 strcpy(timestr, ctime(&t)); 1452 *strchr(timestr, '\n') = '\0'; 1453 bprintf(bp, "%s ", timestr); 1454 } else { 1455 bprintf(bp, "%*s", twidth, " "); 1456 } 1457 } 1458 1459 if (co->show_sets) 1460 bprintf(bp, "set %d ", rule->set); 1461 1462 /* 1463 * print the optional "match probability" 1464 */ 1465 if (rule->cmd_len > 0) { 1466 cmd = rule->cmd ; 1467 if (cmd->opcode == O_PROB) { 1468 ipfw_insn_u32 *p = (ipfw_insn_u32 *)cmd; 1469 double d = 1.0 * p->d[0]; 1470 1471 d = (d / 0x7fffffff); 1472 bprintf(bp, "prob %f ", d); 1473 } 1474 } 1475 1476 /* 1477 * first print actions 1478 */ 1479 for (l = rule->cmd_len - rule->act_ofs, cmd = ACTION_PTR(rule); 1480 l > 0 ; l -= F_LEN(cmd), cmd += F_LEN(cmd)) { 1481 switch(cmd->opcode) { 1482 case O_CHECK_STATE: 1483 bprintf(bp, "check-state"); 1484 if (cmd->arg1 != 0) 1485 ename = object_search_ctlv(fo->tstate, 1486 cmd->arg1, IPFW_TLV_STATE_NAME); 1487 else 1488 ename = NULL; 1489 bprintf(bp, " :%s", ename ? ename: "any"); 1490 /* avoid printing anything else */ 1491 flags = HAVE_PROTO | HAVE_SRCIP | 1492 HAVE_DSTIP | HAVE_IP; 1493 break; 1494 1495 case O_ACCEPT: 1496 bprintf(bp, "allow"); 1497 break; 1498 1499 case O_COUNT: 1500 bprintf(bp, "count"); 1501 break; 1502 1503 case O_DENY: 1504 bprintf(bp, "deny"); 1505 break; 1506 1507 case O_REJECT: 1508 if (cmd->arg1 == ICMP_REJECT_RST) 1509 bprintf(bp, "reset"); 1510 else if (cmd->arg1 == ICMP_UNREACH_HOST) 1511 bprintf(bp, "reject"); 1512 else 1513 print_reject_code(bp, cmd->arg1); 1514 break; 1515 1516 case O_UNREACH6: 1517 if (cmd->arg1 == ICMP6_UNREACH_RST) 1518 bprintf(bp, "reset6"); 1519 else 1520 print_unreach6_code(bp, cmd->arg1); 1521 break; 1522 1523 case O_SKIPTO: 1524 bprint_uint_arg(bp, "skipto ", cmd->arg1); 1525 break; 1526 1527 case O_PIPE: 1528 bprint_uint_arg(bp, "pipe ", cmd->arg1); 1529 break; 1530 1531 case O_QUEUE: 1532 bprint_uint_arg(bp, "queue ", cmd->arg1); 1533 break; 1534 1535 case O_DIVERT: 1536 bprint_uint_arg(bp, "divert ", cmd->arg1); 1537 break; 1538 1539 case O_TEE: 1540 bprint_uint_arg(bp, "tee ", cmd->arg1); 1541 break; 1542 1543 case O_NETGRAPH: 1544 bprint_uint_arg(bp, "netgraph ", cmd->arg1); 1545 break; 1546 1547 case O_NGTEE: 1548 bprint_uint_arg(bp, "ngtee ", cmd->arg1); 1549 break; 1550 1551 case O_FORWARD_IP: 1552 { 1553 ipfw_insn_sa *s = (ipfw_insn_sa *)cmd; 1554 1555 if (s->sa.sin_addr.s_addr == INADDR_ANY) { 1556 bprintf(bp, "fwd tablearg"); 1557 } else { 1558 bprintf(bp, "fwd %s",inet_ntoa(s->sa.sin_addr)); 1559 } 1560 if (s->sa.sin_port) 1561 bprintf(bp, ",%d", s->sa.sin_port); 1562 } 1563 break; 1564 1565 case O_FORWARD_IP6: 1566 { 1567 char buf[INET6_ADDRSTRLEN + IF_NAMESIZE + 2]; 1568 ipfw_insn_sa6 *s = (ipfw_insn_sa6 *)cmd; 1569 1570 bprintf(bp, "fwd "); 1571 if (getnameinfo((const struct sockaddr *)&s->sa, 1572 sizeof(struct sockaddr_in6), buf, sizeof(buf), 1573 NULL, 0, NI_NUMERICHOST) == 0) 1574 bprintf(bp, "%s", buf); 1575 if (s->sa.sin6_port) 1576 bprintf(bp, ",%d", s->sa.sin6_port); 1577 } 1578 break; 1579 1580 case O_LOG: /* O_LOG is printed last */ 1581 logptr = (ipfw_insn_log *)cmd; 1582 break; 1583 1584 case O_ALTQ: /* O_ALTQ is printed after O_LOG */ 1585 altqptr = (ipfw_insn_altq *)cmd; 1586 break; 1587 1588 case O_TAG: 1589 tagptr = cmd; 1590 break; 1591 1592 case O_NAT: 1593 if (cmd->arg1 != IP_FW_NAT44_GLOBAL) 1594 bprint_uint_arg(bp, "nat ", cmd->arg1); 1595 else 1596 bprintf(bp, "nat global"); 1597 break; 1598 1599 case O_SETFIB: 1600 if (cmd->arg1 == IP_FW_TARG) 1601 bprint_uint_arg(bp, "setfib ", cmd->arg1); 1602 else 1603 bprintf(bp, "setfib %u", cmd->arg1 & 0x7FFF); 1604 break; 1605 1606 case O_EXTERNAL_ACTION: { 1607 /* 1608 * The external action can consists of two following 1609 * each other opcodes - O_EXTERNAL_ACTION and 1610 * O_EXTERNAL_INSTANCE. The first contains the ID of 1611 * name of external action. The second contains the ID 1612 * of name of external action instance. 1613 * NOTE: in case when external action has no named 1614 * instances support, the second opcode isn't needed. 1615 */ 1616 has_eaction = cmd; 1617 ename = object_search_ctlv(fo->tstate, cmd->arg1, 1618 IPFW_TLV_EACTION); 1619 if (match_token(rule_eactions, ename) != -1) 1620 bprintf(bp, "%s", ename); 1621 else 1622 bprintf(bp, "eaction %s", ename); 1623 break; 1624 } 1625 1626 case O_EXTERNAL_INSTANCE: { 1627 if (has_eaction == NULL) 1628 break; 1629 /* 1630 * XXX: we need to teach ipfw(9) to rewrite opcodes 1631 * in the user buffer on rule addition. When we add 1632 * the rule, we specify zero TLV type for 1633 * O_EXTERNAL_INSTANCE object. To show correct 1634 * rule after `ipfw add` we need to search instance 1635 * name with zero type. But when we do `ipfw show` 1636 * we calculate TLV type using IPFW_TLV_EACTION_NAME() 1637 * macro. 1638 */ 1639 ename = object_search_ctlv(fo->tstate, cmd->arg1, 0); 1640 if (ename == NULL) 1641 ename = object_search_ctlv(fo->tstate, 1642 cmd->arg1, 1643 IPFW_TLV_EACTION_NAME(has_eaction->arg1)); 1644 bprintf(bp, " %s", ename); 1645 break; 1646 } 1647 1648 case O_EXTERNAL_DATA: { 1649 if (has_eaction == NULL) 1650 break; 1651 /* 1652 * Currently we support data formatting only for 1653 * external data with datalen u16. For unknown data 1654 * print its size in bytes. 1655 */ 1656 if (cmd->len == F_INSN_SIZE(ipfw_insn)) 1657 bprintf(bp, " %u", cmd->arg1); 1658 else 1659 bprintf(bp, " %ubytes", 1660 cmd->len * sizeof(uint32_t)); 1661 break; 1662 } 1663 1664 case O_SETDSCP: 1665 { 1666 const char *code; 1667 1668 if (cmd->arg1 == IP_FW_TARG) { 1669 bprint_uint_arg(bp, "setdscp ", cmd->arg1); 1670 break; 1671 } 1672 uval = cmd->arg1 & 0x3F; 1673 if ((code = match_value(f_ipdscp, uval)) != NULL) 1674 bprintf(bp, "setdscp %s", code); 1675 else 1676 bprint_uint_arg(bp, "setdscp ", uval); 1677 } 1678 break; 1679 1680 case O_REASS: 1681 bprintf(bp, "reass"); 1682 break; 1683 1684 case O_CALLRETURN: 1685 if (cmd->len & F_NOT) 1686 bprintf(bp, "return"); 1687 else 1688 bprint_uint_arg(bp, "call ", cmd->arg1); 1689 break; 1690 1691 default: 1692 bprintf(bp, "** unrecognized action %d len %d ", 1693 cmd->opcode, cmd->len); 1694 } 1695 } 1696 if (logptr) { 1697 if (logptr->max_log > 0) 1698 bprintf(bp, " log logamount %d", logptr->max_log); 1699 else 1700 bprintf(bp, " log"); 1701 } 1702#ifndef NO_ALTQ 1703 if (altqptr) { 1704 print_altq_cmd(bp, altqptr); 1705 } 1706#endif 1707 if (tagptr) { 1708 if (tagptr->len & F_NOT) 1709 bprint_uint_arg(bp, " untag ", tagptr->arg1); 1710 else 1711 bprint_uint_arg(bp, " tag ", tagptr->arg1); 1712 } 1713 1714 /* 1715 * then print the body. 1716 */ 1717 for (l = rule->act_ofs, cmd = rule->cmd; 1718 l > 0 ; l -= F_LEN(cmd) , cmd += F_LEN(cmd)) { 1719 if ((cmd->len & F_OR) || (cmd->len & F_NOT)) 1720 continue; 1721 if (cmd->opcode == O_IP4) { 1722 flags |= HAVE_PROTO4; 1723 break; 1724 } else if (cmd->opcode == O_IP6) { 1725 flags |= HAVE_PROTO6; 1726 break; 1727 } 1728 } 1729 if (rule->flags & IPFW_RULE_NOOPT) { /* empty rules before options */ 1730 if (!co->do_compact) { 1731 show_prerequisites(bp, &flags, HAVE_PROTO, 0); 1732 bprintf(bp, " from any to any"); 1733 } 1734 flags |= HAVE_IP | HAVE_OPTIONS | HAVE_PROTO | 1735 HAVE_SRCIP | HAVE_DSTIP; 1736 } 1737 1738 if (co->comment_only) 1739 comment = "..."; 1740 1741 for (l = rule->act_ofs, cmd = rule->cmd; 1742 l > 0 ; l -= F_LEN(cmd) , cmd += F_LEN(cmd)) { 1743 /* useful alias */ 1744 ipfw_insn_u32 *cmd32 = (ipfw_insn_u32 *)cmd; 1745 1746 if (co->comment_only) { 1747 if (cmd->opcode != O_NOP) 1748 continue; 1749 bprintf(bp, " // %s\n", (char *)(cmd + 1)); 1750 return; 1751 } 1752 1753 show_prerequisites(bp, &flags, 0, cmd->opcode); 1754 1755 switch(cmd->opcode) { 1756 case O_PROB: 1757 break; /* done already */ 1758 1759 case O_PROBE_STATE: 1760 break; /* no need to print anything here */ 1761 1762 case O_IP_SRC: 1763 case O_IP_SRC_LOOKUP: 1764 case O_IP_SRC_MASK: 1765 case O_IP_SRC_ME: 1766 case O_IP_SRC_SET: 1767 show_prerequisites(bp, &flags, HAVE_PROTO, 0); 1768 if (!(flags & HAVE_SRCIP)) 1769 bprintf(bp, " from"); 1770 if ((cmd->len & F_OR) && !or_block) 1771 bprintf(bp, " {"); 1772 print_ip(bp, fo, (ipfw_insn_ip *)cmd, 1773 (flags & HAVE_OPTIONS) ? " src-ip" : ""); 1774 flags |= HAVE_SRCIP; 1775 break; 1776 1777 case O_IP_DST: 1778 case O_IP_DST_LOOKUP: 1779 case O_IP_DST_MASK: 1780 case O_IP_DST_ME: 1781 case O_IP_DST_SET: 1782 show_prerequisites(bp, &flags, HAVE_PROTO|HAVE_SRCIP, 0); 1783 if (!(flags & HAVE_DSTIP)) 1784 bprintf(bp, " to"); 1785 if ((cmd->len & F_OR) && !or_block) 1786 bprintf(bp, " {"); 1787 print_ip(bp, fo, (ipfw_insn_ip *)cmd, 1788 (flags & HAVE_OPTIONS) ? " dst-ip" : ""); 1789 flags |= HAVE_DSTIP; 1790 break; 1791 1792 case O_IP6_SRC: 1793 case O_IP6_SRC_MASK: 1794 case O_IP6_SRC_ME: 1795 show_prerequisites(bp, &flags, HAVE_PROTO, 0); 1796 if (!(flags & HAVE_SRCIP)) 1797 bprintf(bp, " from"); 1798 if ((cmd->len & F_OR) && !or_block) 1799 bprintf(bp, " {"); 1800 print_ip6(bp, (ipfw_insn_ip6 *)cmd, 1801 (flags & HAVE_OPTIONS) ? " src-ip6" : ""); 1802 flags |= HAVE_SRCIP | HAVE_PROTO; 1803 break; 1804 1805 case O_IP6_DST: 1806 case O_IP6_DST_MASK: 1807 case O_IP6_DST_ME: 1808 show_prerequisites(bp, &flags, HAVE_PROTO|HAVE_SRCIP, 0); 1809 if (!(flags & HAVE_DSTIP)) 1810 bprintf(bp, " to"); 1811 if ((cmd->len & F_OR) && !or_block) 1812 bprintf(bp, " {"); 1813 print_ip6(bp, (ipfw_insn_ip6 *)cmd, 1814 (flags & HAVE_OPTIONS) ? " dst-ip6" : ""); 1815 flags |= HAVE_DSTIP; 1816 break; 1817 1818 case O_FLOW6ID: 1819 print_flow6id(bp, (ipfw_insn_u32 *) cmd ); 1820 flags |= HAVE_OPTIONS; 1821 break; 1822 1823 case O_IP_DSTPORT: 1824 show_prerequisites(bp, &flags, 1825 HAVE_PROTO | HAVE_SRCIP | 1826 HAVE_DSTIP | HAVE_IP, 0); 1827 case O_IP_SRCPORT: 1828 if (flags & HAVE_DSTIP) 1829 flags |= HAVE_IP; 1830 show_prerequisites(bp, &flags, 1831 HAVE_PROTO | HAVE_SRCIP, 0); 1832 if ((cmd->len & F_OR) && !or_block) 1833 bprintf(bp, " {"); 1834 if (cmd->len & F_NOT) 1835 bprintf(bp, " not"); 1836 print_newports(bp, (ipfw_insn_u16 *)cmd, proto, 1837 (flags & HAVE_OPTIONS) ? cmd->opcode : 0); 1838 break; 1839 1840 case O_PROTO: { 1841 struct protoent *pe = NULL; 1842 1843 if ((cmd->len & F_OR) && !or_block) 1844 bprintf(bp, " {"); 1845 if (cmd->len & F_NOT) 1846 bprintf(bp, " not"); 1847 proto = cmd->arg1; 1848 pe = getprotobynumber(cmd->arg1); 1849 if ((flags & (HAVE_PROTO4 | HAVE_PROTO6)) && 1850 !(flags & HAVE_PROTO)) 1851 show_prerequisites(bp, &flags, 1852 HAVE_PROTO | HAVE_IP | HAVE_SRCIP | 1853 HAVE_DSTIP | HAVE_OPTIONS, 0); 1854 if (flags & HAVE_OPTIONS) 1855 bprintf(bp, " proto"); 1856 if (pe) 1857 bprintf(bp, " %s", pe->p_name); 1858 else 1859 bprintf(bp, " %u", cmd->arg1); 1860 } 1861 flags |= HAVE_PROTO; 1862 break; 1863 1864 default: /*options ... */ 1865 if (!(cmd->len & (F_OR|F_NOT))) 1866 if (((cmd->opcode == O_IP6) && 1867 (flags & HAVE_PROTO6)) || 1868 ((cmd->opcode == O_IP4) && 1869 (flags & HAVE_PROTO4))) 1870 break; 1871 show_prerequisites(bp, &flags, HAVE_PROTO | HAVE_SRCIP | 1872 HAVE_DSTIP | HAVE_IP | HAVE_OPTIONS, 0); 1873 if ((cmd->len & F_OR) && !or_block) 1874 bprintf(bp, " {"); 1875 if (cmd->len & F_NOT && cmd->opcode != O_IN) 1876 bprintf(bp, " not"); 1877 switch(cmd->opcode) { 1878 case O_MACADDR2: { 1879 ipfw_insn_mac *m = (ipfw_insn_mac *)cmd; 1880 1881 bprintf(bp, " MAC"); 1882 print_mac(bp, m->addr, m->mask); 1883 print_mac(bp, m->addr + 6, m->mask + 6); 1884 } 1885 break; 1886 1887 case O_MAC_TYPE: 1888 print_newports(bp, (ipfw_insn_u16 *)cmd, 1889 IPPROTO_ETHERTYPE, cmd->opcode); 1890 break; 1891 1892 1893 case O_FRAG: 1894 bprintf(bp, " frag"); 1895 break; 1896 1897 case O_FIB: 1898 bprintf(bp, " fib %u", cmd->arg1 ); 1899 break; 1900 case O_SOCKARG: 1901 bprintf(bp, " sockarg"); 1902 break; 1903 1904 case O_IN: 1905 bprintf(bp, cmd->len & F_NOT ? " out" : " in"); 1906 break; 1907 1908 case O_DIVERTED: 1909 switch (cmd->arg1) { 1910 case 3: 1911 bprintf(bp, " diverted"); 1912 break; 1913 case 1: 1914 bprintf(bp, " diverted-loopback"); 1915 break; 1916 case 2: 1917 bprintf(bp, " diverted-output"); 1918 break; 1919 default: 1920 bprintf(bp, " diverted-?<%u>", cmd->arg1); 1921 break; 1922 } 1923 break; 1924 1925 case O_LAYER2: 1926 bprintf(bp, " layer2"); 1927 break; 1928 case O_XMIT: 1929 case O_RECV: 1930 case O_VIA: 1931 { 1932 char const *s, *t; 1933 ipfw_insn_if *cmdif = (ipfw_insn_if *)cmd; 1934 1935 if (cmd->opcode == O_XMIT) 1936 s = "xmit"; 1937 else if (cmd->opcode == O_RECV) 1938 s = "recv"; 1939 else /* if (cmd->opcode == O_VIA) */ 1940 s = "via"; 1941 if (cmdif->name[0] == '\0') 1942 bprintf(bp, " %s %s", s, 1943 inet_ntoa(cmdif->p.ip)); 1944 else if (cmdif->name[0] == '\1') { 1945 /* interface table */ 1946 t = table_search_ctlv(fo->tstate, 1947 cmdif->p.kidx); 1948 bprintf(bp, " %s table(%s)", s, t); 1949 } else 1950 bprintf(bp, " %s %s", s, cmdif->name); 1951 1952 break; 1953 } 1954 case O_IP_FLOW_LOOKUP: 1955 { 1956 char *t; 1957 1958 t = table_search_ctlv(fo->tstate, cmd->arg1); 1959 bprintf(bp, " flow table(%s", t); 1960 if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_u32)) 1961 bprintf(bp, ",%u", 1962 ((ipfw_insn_u32 *)cmd)->d[0]); 1963 bprintf(bp, ")"); 1964 break; 1965 } 1966 case O_IPID: 1967 if (F_LEN(cmd) == 1) 1968 bprintf(bp, " ipid %u", cmd->arg1 ); 1969 else 1970 print_newports(bp, (ipfw_insn_u16 *)cmd, 0, 1971 O_IPID); 1972 break; 1973 1974 case O_IPTTL: 1975 if (F_LEN(cmd) == 1) 1976 bprintf(bp, " ipttl %u", cmd->arg1 ); 1977 else 1978 print_newports(bp, (ipfw_insn_u16 *)cmd, 0, 1979 O_IPTTL); 1980 break; 1981 1982 case O_IPVER: 1983 bprintf(bp, " ipver %u", cmd->arg1 ); 1984 break; 1985 1986 case O_IPPRECEDENCE: 1987 bprintf(bp, " ipprecedence %u", cmd->arg1 >> 5); 1988 break; 1989 1990 case O_DSCP: 1991 print_dscp(bp, (ipfw_insn_u32 *)cmd); 1992 break; 1993 1994 case O_IPLEN: 1995 if (F_LEN(cmd) == 1) 1996 bprintf(bp, " iplen %u", cmd->arg1 ); 1997 else 1998 print_newports(bp, (ipfw_insn_u16 *)cmd, 0, 1999 O_IPLEN); 2000 break; 2001 2002 case O_IPOPT: 2003 print_flags(bp, "ipoptions", cmd, f_ipopts); 2004 break; 2005 2006 case O_IPTOS: 2007 print_flags(bp, "iptos", cmd, f_iptos); 2008 break; 2009 2010 case O_ICMPTYPE: 2011 print_icmptypes(bp, (ipfw_insn_u32 *)cmd); 2012 break; 2013 2014 case O_ESTAB: 2015 bprintf(bp, " established"); 2016 break; 2017 2018 case O_TCPDATALEN: 2019 if (F_LEN(cmd) == 1) 2020 bprintf(bp, " tcpdatalen %u", cmd->arg1 ); 2021 else 2022 print_newports(bp, (ipfw_insn_u16 *)cmd, 0, 2023 O_TCPDATALEN); 2024 break; 2025 2026 case O_TCPFLAGS: 2027 print_flags(bp, "tcpflags", cmd, f_tcpflags); 2028 break; 2029 2030 case O_TCPOPTS: 2031 print_flags(bp, "tcpoptions", cmd, f_tcpopts); 2032 break; 2033 2034 case O_TCPWIN: 2035 if (F_LEN(cmd) == 1) 2036 bprintf(bp, " tcpwin %u", cmd->arg1); 2037 else 2038 print_newports(bp, (ipfw_insn_u16 *)cmd, 0, 2039 O_TCPWIN); 2040 break; 2041 2042 case O_TCPACK: 2043 bprintf(bp, " tcpack %d", ntohl(cmd32->d[0])); 2044 break; 2045 2046 case O_TCPSEQ: 2047 bprintf(bp, " tcpseq %d", ntohl(cmd32->d[0])); 2048 break; 2049 2050 case O_UID: 2051 { 2052 struct passwd *pwd = getpwuid(cmd32->d[0]); 2053 2054 if (pwd) 2055 bprintf(bp, " uid %s", pwd->pw_name); 2056 else 2057 bprintf(bp, " uid %u", cmd32->d[0]); 2058 } 2059 break; 2060 2061 case O_GID: 2062 { 2063 struct group *grp = getgrgid(cmd32->d[0]); 2064 2065 if (grp) 2066 bprintf(bp, " gid %s", grp->gr_name); 2067 else 2068 bprintf(bp, " gid %u", cmd32->d[0]); 2069 } 2070 break; 2071 2072 case O_JAIL: 2073 bprintf(bp, " jail %d", cmd32->d[0]); 2074 break; 2075 2076 case O_VERREVPATH: 2077 bprintf(bp, " verrevpath"); 2078 break; 2079 2080 case O_VERSRCREACH: 2081 bprintf(bp, " versrcreach"); 2082 break; 2083 2084 case O_ANTISPOOF: 2085 bprintf(bp, " antispoof"); 2086 break; 2087 2088 case O_IPSEC: 2089 bprintf(bp, " ipsec"); 2090 break; 2091 2092 case O_NOP: 2093 comment = (char *)(cmd + 1); 2094 break; 2095 2096 case O_KEEP_STATE: 2097 bprintf(bp, " keep-state"); 2098 bprintf(bp, " :%s", 2099 object_search_ctlv(fo->tstate, cmd->arg1, 2100 IPFW_TLV_STATE_NAME)); 2101 break; 2102 2103 case O_LIMIT: { 2104 struct _s_x *p = limit_masks; 2105 ipfw_insn_limit *c = (ipfw_insn_limit *)cmd; 2106 uint8_t x = c->limit_mask; 2107 char const *comma = " "; 2108 2109 bprintf(bp, " limit"); 2110 for (; p->x != 0 ; p++) 2111 if ((x & p->x) == p->x) { 2112 x &= ~p->x; 2113 bprintf(bp, "%s%s", comma,p->s); 2114 comma = ","; 2115 } 2116 bprint_uint_arg(bp, " ", c->conn_limit); 2117 bprintf(bp, " :%s", 2118 object_search_ctlv(fo->tstate, cmd->arg1, 2119 IPFW_TLV_STATE_NAME)); 2120 break; 2121 } 2122 2123 case O_IP6: 2124 bprintf(bp, " ip6"); 2125 break; 2126 2127 case O_IP4: 2128 bprintf(bp, " ip4"); 2129 break; 2130 2131 case O_ICMP6TYPE: 2132 print_icmp6types(bp, (ipfw_insn_u32 *)cmd); 2133 break; 2134 2135 case O_EXT_HDR: 2136 print_ext6hdr(bp, (ipfw_insn *)cmd); 2137 break; 2138 2139 case O_TAGGED: 2140 if (F_LEN(cmd) == 1) 2141 bprint_uint_arg(bp, " tagged ", 2142 cmd->arg1); 2143 else 2144 print_newports(bp, (ipfw_insn_u16 *)cmd, 2145 0, O_TAGGED); 2146 break; 2147 2148 default: 2149 bprintf(bp, " [opcode %d len %d]", 2150 cmd->opcode, cmd->len); 2151 } 2152 } 2153 if (cmd->len & F_OR) { 2154 bprintf(bp, " or"); 2155 or_block = 1; 2156 } else if (or_block) { 2157 bprintf(bp, " }"); 2158 or_block = 0; 2159 } 2160 } 2161 show_prerequisites(bp, &flags, HAVE_PROTO | HAVE_SRCIP | HAVE_DSTIP 2162 | HAVE_IP, 0); 2163 if (comment) 2164 bprintf(bp, " // %s", comment); 2165 bprintf(bp, "\n"); 2166} 2167 2168static void 2169show_dyn_state(struct cmdline_opts *co, struct format_opts *fo, 2170 struct buf_pr *bp, ipfw_dyn_rule *d) 2171{ 2172 struct protoent *pe; 2173 struct in_addr a; 2174 uint16_t rulenum; 2175 char buf[INET6_ADDRSTRLEN]; 2176 2177 if (!co->do_expired) { 2178 if (!d->expire && !(d->dyn_type == O_LIMIT_PARENT)) 2179 return; 2180 } 2181 bcopy(&d->rule, &rulenum, sizeof(rulenum)); 2182 bprintf(bp, "%05d", rulenum); 2183 if (fo->pcwidth > 0 || fo->bcwidth > 0) { 2184 bprintf(bp, " "); 2185 pr_u64(bp, &d->pcnt, fo->pcwidth); 2186 pr_u64(bp, &d->bcnt, fo->bcwidth); 2187 bprintf(bp, "(%ds)", d->expire); 2188 } 2189 switch (d->dyn_type) { 2190 case O_LIMIT_PARENT: 2191 bprintf(bp, " PARENT %d", d->count); 2192 break; 2193 case O_LIMIT: 2194 bprintf(bp, " LIMIT"); 2195 break; 2196 case O_KEEP_STATE: /* bidir, no mask */ 2197 bprintf(bp, " STATE"); 2198 break; 2199 } 2200 2201 if ((pe = getprotobynumber(d->id.proto)) != NULL) 2202 bprintf(bp, " %s", pe->p_name); 2203 else 2204 bprintf(bp, " proto %u", d->id.proto); 2205 2206 if (d->id.addr_type == 4) { 2207 a.s_addr = htonl(d->id.src_ip); 2208 bprintf(bp, " %s %d", inet_ntoa(a), d->id.src_port); 2209 2210 a.s_addr = htonl(d->id.dst_ip); 2211 bprintf(bp, " <-> %s %d", inet_ntoa(a), d->id.dst_port); 2212 } else if (d->id.addr_type == 6) { 2213 bprintf(bp, " %s %d", inet_ntop(AF_INET6, &d->id.src_ip6, buf, 2214 sizeof(buf)), d->id.src_port); 2215 bprintf(bp, " <-> %s %d", inet_ntop(AF_INET6, &d->id.dst_ip6, 2216 buf, sizeof(buf)), d->id.dst_port); 2217 } else 2218 bprintf(bp, " UNKNOWN <-> UNKNOWN"); 2219 if (d->kidx != 0) 2220 bprintf(bp, " :%s", object_search_ctlv(fo->tstate, 2221 d->kidx, IPFW_TLV_STATE_NAME)); 2222} 2223 2224static int 2225do_range_cmd(int cmd, ipfw_range_tlv *rt) 2226{ 2227 ipfw_range_header rh; 2228 size_t sz; 2229 2230 memset(&rh, 0, sizeof(rh)); 2231 memcpy(&rh.range, rt, sizeof(*rt)); 2232 rh.range.head.length = sizeof(*rt); 2233 rh.range.head.type = IPFW_TLV_RANGE; 2234 sz = sizeof(rh); 2235 2236 if (do_get3(cmd, &rh.opheader, &sz) != 0) 2237 return (-1); 2238 /* Save number of matched objects */ 2239 rt->new_set = rh.range.new_set; 2240 return (0); 2241} 2242 2243/* 2244 * This one handles all set-related commands 2245 * ipfw set { show | enable | disable } 2246 * ipfw set swap X Y 2247 * ipfw set move X to Y 2248 * ipfw set move rule X to Y 2249 */ 2250void 2251ipfw_sets_handler(char *av[]) 2252{ 2253 ipfw_range_tlv rt; 2254 char *msg; 2255 size_t size; 2256 uint32_t masks[2]; 2257 int i; 2258 uint16_t rulenum; 2259 uint8_t cmd; 2260 2261 av++; 2262 memset(&rt, 0, sizeof(rt)); 2263 2264 if (av[0] == NULL) 2265 errx(EX_USAGE, "set needs command"); 2266 if (_substrcmp(*av, "show") == 0) { 2267 struct format_opts fo; 2268 ipfw_cfg_lheader *cfg; 2269 2270 memset(&fo, 0, sizeof(fo)); 2271 if (ipfw_get_config(&co, &fo, &cfg, &size) != 0) 2272 err(EX_OSERR, "requesting config failed"); 2273 2274 for (i = 0, msg = "disable"; i < RESVD_SET; i++) 2275 if ((cfg->set_mask & (1<<i)) == 0) { 2276 printf("%s %d", msg, i); 2277 msg = ""; 2278 } 2279 msg = (cfg->set_mask != (uint32_t)-1) ? " enable" : "enable"; 2280 for (i = 0; i < RESVD_SET; i++) 2281 if ((cfg->set_mask & (1<<i)) != 0) { 2282 printf("%s %d", msg, i); 2283 msg = ""; 2284 } 2285 printf("\n"); 2286 free(cfg); 2287 } else if (_substrcmp(*av, "swap") == 0) { 2288 av++; 2289 if ( av[0] == NULL || av[1] == NULL ) 2290 errx(EX_USAGE, "set swap needs 2 set numbers\n"); 2291 rt.set = atoi(av[0]); 2292 rt.new_set = atoi(av[1]); 2293 if (!isdigit(*(av[0])) || rt.set > RESVD_SET) 2294 errx(EX_DATAERR, "invalid set number %s\n", av[0]); 2295 if (!isdigit(*(av[1])) || rt.new_set > RESVD_SET) 2296 errx(EX_DATAERR, "invalid set number %s\n", av[1]); 2297 i = do_range_cmd(IP_FW_SET_SWAP, &rt); 2298 } else if (_substrcmp(*av, "move") == 0) { 2299 av++; 2300 if (av[0] && _substrcmp(*av, "rule") == 0) { 2301 rt.flags = IPFW_RCFLAG_RANGE; /* move rules to new set */ 2302 cmd = IP_FW_XMOVE; 2303 av++; 2304 } else 2305 cmd = IP_FW_SET_MOVE; /* Move set to new one */ 2306 if (av[0] == NULL || av[1] == NULL || av[2] == NULL || 2307 av[3] != NULL || _substrcmp(av[1], "to") != 0) 2308 errx(EX_USAGE, "syntax: set move [rule] X to Y\n"); 2309 rulenum = atoi(av[0]); 2310 rt.new_set = atoi(av[2]); 2311 if (cmd == IP_FW_XMOVE) { 2312 rt.start_rule = rulenum; 2313 rt.end_rule = rulenum; 2314 } else 2315 rt.set = rulenum; 2316 rt.new_set = atoi(av[2]); 2317 if (!isdigit(*(av[0])) || (cmd == 3 && rt.set > RESVD_SET) || 2318 (cmd == 2 && rt.start_rule == IPFW_DEFAULT_RULE) ) 2319 errx(EX_DATAERR, "invalid source number %s\n", av[0]); 2320 if (!isdigit(*(av[2])) || rt.new_set > RESVD_SET) 2321 errx(EX_DATAERR, "invalid dest. set %s\n", av[1]); 2322 i = do_range_cmd(cmd, &rt); 2323 if (i < 0) 2324 err(EX_OSERR, "failed to move %s", 2325 cmd == IP_FW_SET_MOVE ? "set": "rule"); 2326 } else if (_substrcmp(*av, "disable") == 0 || 2327 _substrcmp(*av, "enable") == 0 ) { 2328 int which = _substrcmp(*av, "enable") == 0 ? 1 : 0; 2329 2330 av++; 2331 masks[0] = masks[1] = 0; 2332 2333 while (av[0]) { 2334 if (isdigit(**av)) { 2335 i = atoi(*av); 2336 if (i < 0 || i > RESVD_SET) 2337 errx(EX_DATAERR, 2338 "invalid set number %d\n", i); 2339 masks[which] |= (1<<i); 2340 } else if (_substrcmp(*av, "disable") == 0) 2341 which = 0; 2342 else if (_substrcmp(*av, "enable") == 0) 2343 which = 1; 2344 else 2345 errx(EX_DATAERR, 2346 "invalid set command %s\n", *av); 2347 av++; 2348 } 2349 if ( (masks[0] & masks[1]) != 0 ) 2350 errx(EX_DATAERR, 2351 "cannot enable and disable the same set\n"); 2352 2353 rt.set = masks[0]; 2354 rt.new_set = masks[1]; 2355 i = do_range_cmd(IP_FW_SET_ENABLE, &rt); 2356 if (i) 2357 warn("set enable/disable: setsockopt(IP_FW_SET_ENABLE)"); 2358 } else 2359 errx(EX_USAGE, "invalid set command %s\n", *av); 2360} 2361 2362void 2363ipfw_sysctl_handler(char *av[], int which) 2364{ 2365 av++; 2366 2367 if (av[0] == NULL) { 2368 warnx("missing keyword to enable/disable\n"); 2369 } else if (_substrcmp(*av, "firewall") == 0) { 2370 sysctlbyname("net.inet.ip.fw.enable", NULL, 0, 2371 &which, sizeof(which)); 2372 sysctlbyname("net.inet6.ip6.fw.enable", NULL, 0, 2373 &which, sizeof(which)); 2374 } else if (_substrcmp(*av, "one_pass") == 0) { 2375 sysctlbyname("net.inet.ip.fw.one_pass", NULL, 0, 2376 &which, sizeof(which)); 2377 } else if (_substrcmp(*av, "debug") == 0) { 2378 sysctlbyname("net.inet.ip.fw.debug", NULL, 0, 2379 &which, sizeof(which)); 2380 } else if (_substrcmp(*av, "verbose") == 0) { 2381 sysctlbyname("net.inet.ip.fw.verbose", NULL, 0, 2382 &which, sizeof(which)); 2383 } else if (_substrcmp(*av, "dyn_keepalive") == 0) { 2384 sysctlbyname("net.inet.ip.fw.dyn_keepalive", NULL, 0, 2385 &which, sizeof(which)); 2386#ifndef NO_ALTQ 2387 } else if (_substrcmp(*av, "altq") == 0) { 2388 altq_set_enabled(which); 2389#endif 2390 } else { 2391 warnx("unrecognize enable/disable keyword: %s\n", *av); 2392 } 2393} 2394 2395typedef void state_cb(struct cmdline_opts *co, struct format_opts *fo, 2396 void *arg, void *state); 2397 2398static void 2399prepare_format_dyn(struct cmdline_opts *co, struct format_opts *fo, 2400 void *arg, void *_state) 2401{ 2402 ipfw_dyn_rule *d; 2403 int width; 2404 uint8_t set; 2405 2406 d = (ipfw_dyn_rule *)_state; 2407 /* Count _ALL_ states */ 2408 fo->dcnt++; 2409 2410 if (fo->show_counters == 0) 2411 return; 2412 2413 if (co->use_set) { 2414 /* skip states from another set */ 2415 bcopy((char *)&d->rule + sizeof(uint16_t), &set, 2416 sizeof(uint8_t)); 2417 if (set != co->use_set - 1) 2418 return; 2419 } 2420 2421 width = pr_u64(NULL, &d->pcnt, 0); 2422 if (width > fo->pcwidth) 2423 fo->pcwidth = width; 2424 2425 width = pr_u64(NULL, &d->bcnt, 0); 2426 if (width > fo->bcwidth) 2427 fo->bcwidth = width; 2428} 2429 2430static int 2431foreach_state(struct cmdline_opts *co, struct format_opts *fo, 2432 caddr_t base, size_t sz, state_cb dyn_bc, void *dyn_arg) 2433{ 2434 int ttype; 2435 state_cb *fptr; 2436 void *farg; 2437 ipfw_obj_tlv *tlv; 2438 ipfw_obj_ctlv *ctlv; 2439 2440 fptr = NULL; 2441 ttype = 0; 2442 2443 while (sz > 0) { 2444 ctlv = (ipfw_obj_ctlv *)base; 2445 switch (ctlv->head.type) { 2446 case IPFW_TLV_DYNSTATE_LIST: 2447 base += sizeof(*ctlv); 2448 sz -= sizeof(*ctlv); 2449 ttype = IPFW_TLV_DYN_ENT; 2450 fptr = dyn_bc; 2451 farg = dyn_arg; 2452 break; 2453 default: 2454 return (sz); 2455 } 2456 2457 while (sz > 0) { 2458 tlv = (ipfw_obj_tlv *)base; 2459 if (tlv->type != ttype) 2460 break; 2461 2462 fptr(co, fo, farg, tlv + 1); 2463 sz -= tlv->length; 2464 base += tlv->length; 2465 } 2466 } 2467 2468 return (sz); 2469} 2470 2471static void 2472prepare_format_opts(struct cmdline_opts *co, struct format_opts *fo, 2473 ipfw_obj_tlv *rtlv, int rcnt, caddr_t dynbase, size_t dynsz) 2474{ 2475 int bcwidth, pcwidth, width; 2476 int n; 2477 struct ip_fw_bcounter *cntr; 2478 struct ip_fw_rule *r; 2479 2480 bcwidth = 0; 2481 pcwidth = 0; 2482 if (fo->show_counters != 0) { 2483 for (n = 0; n < rcnt; n++, 2484 rtlv = (ipfw_obj_tlv *)((caddr_t)rtlv + rtlv->length)) { 2485 cntr = (struct ip_fw_bcounter *)(rtlv + 1); 2486 r = (struct ip_fw_rule *)((caddr_t)cntr + cntr->size); 2487 /* skip rules from another set */ 2488 if (co->use_set && r->set != co->use_set - 1) 2489 continue; 2490 2491 /* packet counter */ 2492 width = pr_u64(NULL, &cntr->pcnt, 0); 2493 if (width > pcwidth) 2494 pcwidth = width; 2495 2496 /* byte counter */ 2497 width = pr_u64(NULL, &cntr->bcnt, 0); 2498 if (width > bcwidth) 2499 bcwidth = width; 2500 } 2501 } 2502 fo->bcwidth = bcwidth; 2503 fo->pcwidth = pcwidth; 2504 2505 fo->dcnt = 0; 2506 if (co->do_dynamic && dynsz > 0) 2507 foreach_state(co, fo, dynbase, dynsz, prepare_format_dyn, NULL); 2508} 2509 2510static int 2511list_static_range(struct cmdline_opts *co, struct format_opts *fo, 2512 struct buf_pr *bp, ipfw_obj_tlv *rtlv, int rcnt) 2513{ 2514 int n, seen; 2515 struct ip_fw_rule *r; 2516 struct ip_fw_bcounter *cntr; 2517 int c = 0; 2518 2519 for (n = seen = 0; n < rcnt; n++, 2520 rtlv = (ipfw_obj_tlv *)((caddr_t)rtlv + rtlv->length)) { 2521 2522 if ((fo->show_counters | fo->show_time) != 0) { 2523 cntr = (struct ip_fw_bcounter *)(rtlv + 1); 2524 r = (struct ip_fw_rule *)((caddr_t)cntr + cntr->size); 2525 } else { 2526 cntr = NULL; 2527 r = (struct ip_fw_rule *)(rtlv + 1); 2528 } 2529 if (r->rulenum > fo->last) 2530 break; 2531 if (co->use_set && r->set != co->use_set - 1) 2532 continue; 2533 if (r->rulenum >= fo->first && r->rulenum <= fo->last) { 2534 show_static_rule(co, fo, bp, r, cntr); 2535 printf("%s", bp->buf); 2536 c += rtlv->length; 2537 bp_flush(bp); 2538 seen++; 2539 } 2540 } 2541 2542 return (seen); 2543} 2544 2545static void 2546list_dyn_state(struct cmdline_opts *co, struct format_opts *fo, 2547 void *_arg, void *_state) 2548{ 2549 uint16_t rulenum; 2550 uint8_t set; 2551 ipfw_dyn_rule *d; 2552 struct buf_pr *bp; 2553 2554 d = (ipfw_dyn_rule *)_state; 2555 bp = (struct buf_pr *)_arg; 2556 2557 bcopy(&d->rule, &rulenum, sizeof(rulenum)); 2558 if (rulenum > fo->last) 2559 return; 2560 if (co->use_set) { 2561 bcopy((char *)&d->rule + sizeof(uint16_t), 2562 &set, sizeof(uint8_t)); 2563 if (set != co->use_set - 1) 2564 return; 2565 } 2566 if (rulenum >= fo->first) { 2567 show_dyn_state(co, fo, bp, d); 2568 printf("%s\n", bp->buf); 2569 bp_flush(bp); 2570 } 2571} 2572 2573static int 2574list_dyn_range(struct cmdline_opts *co, struct format_opts *fo, 2575 struct buf_pr *bp, caddr_t base, size_t sz) 2576{ 2577 2578 sz = foreach_state(co, fo, base, sz, list_dyn_state, bp); 2579 return (sz); 2580} 2581 2582void 2583ipfw_list(int ac, char *av[], int show_counters) 2584{ 2585 ipfw_cfg_lheader *cfg; 2586 struct format_opts sfo; 2587 size_t sz; 2588 int error; 2589 int lac; 2590 char **lav; 2591 uint32_t rnum; 2592 char *endptr; 2593 2594 if (co.test_only) { 2595 fprintf(stderr, "Testing only, list disabled\n"); 2596 return; 2597 } 2598 if (co.do_pipe) { 2599 dummynet_list(ac, av, show_counters); 2600 return; 2601 } 2602 2603 ac--; 2604 av++; 2605 memset(&sfo, 0, sizeof(sfo)); 2606 2607 /* Determine rule range to request */ 2608 if (ac > 0) { 2609 for (lac = ac, lav = av; lac != 0; lac--) { 2610 rnum = strtoul(*lav++, &endptr, 10); 2611 if (sfo.first == 0 || rnum < sfo.first) 2612 sfo.first = rnum; 2613 2614 if (*endptr == '-') 2615 rnum = strtoul(endptr + 1, &endptr, 10); 2616 if (sfo.last == 0 || rnum > sfo.last) 2617 sfo.last = rnum; 2618 } 2619 } 2620 2621 /* get configuraion from kernel */ 2622 cfg = NULL; 2623 sfo.show_counters = show_counters; 2624 sfo.show_time = co.do_time; 2625 sfo.flags = IPFW_CFG_GET_STATIC; 2626 if (co.do_dynamic != 0) 2627 sfo.flags |= IPFW_CFG_GET_STATES; 2628 if ((sfo.show_counters | sfo.show_time) != 0) 2629 sfo.flags |= IPFW_CFG_GET_COUNTERS; 2630 if (ipfw_get_config(&co, &sfo, &cfg, &sz) != 0) 2631 err(EX_OSERR, "retrieving config failed"); 2632 2633 error = ipfw_show_config(&co, &sfo, cfg, sz, ac, av); 2634 2635 free(cfg); 2636 2637 if (error != EX_OK) 2638 exit(error); 2639} 2640 2641static int 2642ipfw_show_config(struct cmdline_opts *co, struct format_opts *fo, 2643 ipfw_cfg_lheader *cfg, size_t sz, int ac, char *av[]) 2644{ 2645 caddr_t dynbase; 2646 size_t dynsz; 2647 int rcnt; 2648 int exitval = EX_OK; 2649 int lac; 2650 char **lav; 2651 char *endptr; 2652 size_t readsz; 2653 struct buf_pr bp; 2654 ipfw_obj_ctlv *ctlv, *tstate; 2655 ipfw_obj_tlv *rbase; 2656 2657 /* 2658 * Handle tablenames TLV first, if any 2659 */ 2660 tstate = NULL; 2661 rbase = NULL; 2662 dynbase = NULL; 2663 dynsz = 0; 2664 readsz = sizeof(*cfg); 2665 rcnt = 0; 2666 2667 fo->set_mask = cfg->set_mask; 2668 2669 ctlv = (ipfw_obj_ctlv *)(cfg + 1); 2670 2671 if (cfg->flags & IPFW_CFG_GET_STATIC) { 2672 /* We've requested static rules */ 2673 if (ctlv->head.type == IPFW_TLV_TBLNAME_LIST) { 2674 object_sort_ctlv(ctlv); 2675 fo->tstate = ctlv; 2676 readsz += ctlv->head.length; 2677 ctlv = (ipfw_obj_ctlv *)((caddr_t)ctlv + 2678 ctlv->head.length); 2679 } 2680 2681 if (ctlv->head.type == IPFW_TLV_RULE_LIST) { 2682 rbase = (ipfw_obj_tlv *)(ctlv + 1); 2683 rcnt = ctlv->count; 2684 readsz += ctlv->head.length; 2685 ctlv = (ipfw_obj_ctlv *)((caddr_t)ctlv + 2686 ctlv->head.length); 2687 } 2688 } 2689 2690 if ((cfg->flags & IPFW_CFG_GET_STATES) && (readsz != sz)) { 2691 /* We may have some dynamic states */ 2692 dynsz = sz - readsz; 2693 /* Skip empty header */ 2694 if (dynsz != sizeof(ipfw_obj_ctlv)) 2695 dynbase = (caddr_t)ctlv; 2696 else 2697 dynsz = 0; 2698 } 2699 2700 prepare_format_opts(co, fo, rbase, rcnt, dynbase, dynsz); 2701 bp_alloc(&bp, 4096); 2702 2703 /* if no rule numbers were specified, list all rules */ 2704 if (ac == 0) { 2705 fo->first = 0; 2706 fo->last = IPFW_DEFAULT_RULE; 2707 list_static_range(co, fo, &bp, rbase, rcnt); 2708 2709 if (co->do_dynamic && dynsz > 0) { 2710 printf("## Dynamic rules (%d %zu):\n", fo->dcnt, dynsz); 2711 list_dyn_range(co, fo, &bp, dynbase, dynsz); 2712 } 2713 2714 bp_free(&bp); 2715 return (EX_OK); 2716 } 2717 2718 /* display specific rules requested on command line */ 2719 for (lac = ac, lav = av; lac != 0; lac--) { 2720 /* convert command line rule # */ 2721 fo->last = fo->first = strtoul(*lav++, &endptr, 10); 2722 if (*endptr == '-') 2723 fo->last = strtoul(endptr + 1, &endptr, 10); 2724 if (*endptr) { 2725 exitval = EX_USAGE; 2726 warnx("invalid rule number: %s", *(lav - 1)); 2727 continue; 2728 } 2729 2730 if (list_static_range(co, fo, &bp, rbase, rcnt) == 0) { 2731 /* give precedence to other error(s) */ 2732 if (exitval == EX_OK) 2733 exitval = EX_UNAVAILABLE; 2734 if (fo->first == fo->last) 2735 warnx("rule %u does not exist", fo->first); 2736 else 2737 warnx("no rules in range %u-%u", 2738 fo->first, fo->last); 2739 } 2740 } 2741 2742 if (co->do_dynamic && dynsz > 0) { 2743 printf("## Dynamic rules:\n"); 2744 for (lac = ac, lav = av; lac != 0; lac--) { 2745 fo->last = fo->first = strtoul(*lav++, &endptr, 10); 2746 if (*endptr == '-') 2747 fo->last = strtoul(endptr+1, &endptr, 10); 2748 if (*endptr) 2749 /* already warned */ 2750 continue; 2751 list_dyn_range(co, fo, &bp, dynbase, dynsz); 2752 } 2753 } 2754 2755 bp_free(&bp); 2756 return (exitval); 2757} 2758 2759 2760/* 2761 * Retrieves current ipfw configuration of given type 2762 * and stores its pointer to @pcfg. 2763 * 2764 * Caller is responsible for freeing @pcfg. 2765 * 2766 * Returns 0 on success. 2767 */ 2768 2769static int 2770ipfw_get_config(struct cmdline_opts *co, struct format_opts *fo, 2771 ipfw_cfg_lheader **pcfg, size_t *psize) 2772{ 2773 ipfw_cfg_lheader *cfg; 2774 size_t sz; 2775 int i; 2776 2777 2778 if (co->test_only != 0) { 2779 fprintf(stderr, "Testing only, list disabled\n"); 2780 return (0); 2781 } 2782 2783 /* Start with some data size */ 2784 sz = 4096; 2785 cfg = NULL; 2786 2787 for (i = 0; i < 16; i++) { 2788 if (cfg != NULL) 2789 free(cfg); 2790 if ((cfg = calloc(1, sz)) == NULL) 2791 return (ENOMEM); 2792 2793 cfg->flags = fo->flags; 2794 cfg->start_rule = fo->first; 2795 cfg->end_rule = fo->last; 2796 2797 if (do_get3(IP_FW_XGET, &cfg->opheader, &sz) != 0) { 2798 if (errno != ENOMEM) { 2799 free(cfg); 2800 return (errno); 2801 } 2802 2803 /* Buffer size is not enough. Try to increase */ 2804 sz = sz * 2; 2805 if (sz < cfg->size) 2806 sz = cfg->size; 2807 continue; 2808 } 2809 2810 *pcfg = cfg; 2811 *psize = sz; 2812 return (0); 2813 } 2814 2815 free(cfg); 2816 return (ENOMEM); 2817} 2818 2819static int 2820lookup_host (char *host, struct in_addr *ipaddr) 2821{ 2822 struct hostent *he; 2823 2824 if (!inet_aton(host, ipaddr)) { 2825 if ((he = gethostbyname(host)) == NULL) 2826 return(-1); 2827 *ipaddr = *(struct in_addr *)he->h_addr_list[0]; 2828 } 2829 return(0); 2830} 2831 2832struct tidx { 2833 ipfw_obj_ntlv *idx; 2834 uint32_t count; 2835 uint32_t size; 2836 uint16_t counter; 2837 uint8_t set; 2838}; 2839 2840int 2841ipfw_check_object_name(const char *name) 2842{ 2843 int c, i, l; 2844 2845 /* 2846 * Check that name is null-terminated and contains 2847 * valid symbols only. Valid mask is: 2848 * [a-zA-Z0-9\-_\.]{1,63} 2849 */ 2850 l = strlen(name); 2851 if (l == 0 || l >= 64) 2852 return (EINVAL); 2853 for (i = 0; i < l; i++) { 2854 c = name[i]; 2855 if (isalpha(c) || isdigit(c) || c == '_' || 2856 c == '-' || c == '.') 2857 continue; 2858 return (EINVAL); 2859 } 2860 return (0); 2861} 2862 2863static char *default_state_name = "default"; 2864static int 2865state_check_name(const char *name) 2866{ 2867 2868 if (ipfw_check_object_name(name) != 0) 2869 return (EINVAL); 2870 if (strcmp(name, "any") == 0) 2871 return (EINVAL); 2872 return (0); 2873} 2874 2875static int 2876eaction_check_name(const char *name) 2877{ 2878 2879 if (ipfw_check_object_name(name) != 0) 2880 return (EINVAL); 2881 /* Restrict some 'special' names */ 2882 if (match_token(rule_actions, name) != -1 && 2883 match_token(rule_action_params, name) != -1) 2884 return (EINVAL); 2885 return (0); 2886} 2887 2888static uint16_t 2889pack_object(struct tidx *tstate, char *name, int otype) 2890{ 2891 int i; 2892 ipfw_obj_ntlv *ntlv; 2893 2894 for (i = 0; i < tstate->count; i++) { 2895 if (strcmp(tstate->idx[i].name, name) != 0) 2896 continue; 2897 if (tstate->idx[i].set != tstate->set) 2898 continue; 2899 if (tstate->idx[i].head.type != otype) 2900 continue; 2901 2902 return (tstate->idx[i].idx); 2903 } 2904 2905 if (tstate->count + 1 > tstate->size) { 2906 tstate->size += 4; 2907 tstate->idx = realloc(tstate->idx, tstate->size * 2908 sizeof(ipfw_obj_ntlv)); 2909 if (tstate->idx == NULL) 2910 return (0); 2911 } 2912 2913 ntlv = &tstate->idx[i]; 2914 memset(ntlv, 0, sizeof(ipfw_obj_ntlv)); 2915 strlcpy(ntlv->name, name, sizeof(ntlv->name)); 2916 ntlv->head.type = otype; 2917 ntlv->head.length = sizeof(ipfw_obj_ntlv); 2918 ntlv->set = tstate->set; 2919 ntlv->idx = ++tstate->counter; 2920 tstate->count++; 2921 2922 return (ntlv->idx); 2923} 2924 2925static uint16_t 2926pack_table(struct tidx *tstate, char *name) 2927{ 2928 2929 if (table_check_name(name) != 0) 2930 return (0); 2931 2932 return (pack_object(tstate, name, IPFW_TLV_TBL_NAME)); 2933} 2934 2935void 2936fill_table(struct _ipfw_insn *cmd, char *av, uint8_t opcode, 2937 struct tidx *tstate) 2938{ 2939 uint32_t *d = ((ipfw_insn_u32 *)cmd)->d; 2940 uint16_t uidx; 2941 char *p; 2942 2943 if ((p = strchr(av + 6, ')')) == NULL) 2944 errx(EX_DATAERR, "forgotten parenthesis: '%s'", av); 2945 *p = '\0'; 2946 p = strchr(av + 6, ','); 2947 if (p) 2948 *p++ = '\0'; 2949 2950 if ((uidx = pack_table(tstate, av + 6)) == 0) 2951 errx(EX_DATAERR, "Invalid table name: %s", av + 6); 2952 2953 cmd->opcode = opcode; 2954 cmd->arg1 = uidx; 2955 if (p) { 2956 cmd->len |= F_INSN_SIZE(ipfw_insn_u32); 2957 d[0] = strtoul(p, NULL, 0); 2958 } else 2959 cmd->len |= F_INSN_SIZE(ipfw_insn); 2960} 2961 2962 2963/* 2964 * fills the addr and mask fields in the instruction as appropriate from av. 2965 * Update length as appropriate. 2966 * The following formats are allowed: 2967 * me returns O_IP_*_ME 2968 * 1.2.3.4 single IP address 2969 * 1.2.3.4:5.6.7.8 address:mask 2970 * 1.2.3.4/24 address/mask 2971 * 1.2.3.4/26{1,6,5,4,23} set of addresses in a subnet 2972 * We can have multiple comma-separated address/mask entries. 2973 */ 2974static void 2975fill_ip(ipfw_insn_ip *cmd, char *av, int cblen, struct tidx *tstate) 2976{ 2977 int len = 0; 2978 uint32_t *d = ((ipfw_insn_u32 *)cmd)->d; 2979 2980 cmd->o.len &= ~F_LEN_MASK; /* zero len */ 2981 2982 if (_substrcmp(av, "any") == 0) 2983 return; 2984 2985 if (_substrcmp(av, "me") == 0) { 2986 cmd->o.len |= F_INSN_SIZE(ipfw_insn); 2987 return; 2988 } 2989 2990 if (strncmp(av, "table(", 6) == 0) { 2991 fill_table(&cmd->o, av, O_IP_DST_LOOKUP, tstate); 2992 return; 2993 } 2994 2995 while (av) { 2996 /* 2997 * After the address we can have '/' or ':' indicating a mask, 2998 * ',' indicating another address follows, '{' indicating a 2999 * set of addresses of unspecified size. 3000 */ 3001 char *t = NULL, *p = strpbrk(av, "/:,{"); 3002 int masklen; 3003 char md, nd = '\0'; 3004 3005 CHECK_LENGTH(cblen, F_INSN_SIZE(ipfw_insn) + 2 + len); 3006 3007 if (p) { 3008 md = *p; 3009 *p++ = '\0'; 3010 if ((t = strpbrk(p, ",{")) != NULL) { 3011 nd = *t; 3012 *t = '\0'; 3013 } 3014 } else 3015 md = '\0'; 3016 3017 if (lookup_host(av, (struct in_addr *)&d[0]) != 0) 3018 errx(EX_NOHOST, "hostname ``%s'' unknown", av); 3019 switch (md) { 3020 case ':': 3021 if (!inet_aton(p, (struct in_addr *)&d[1])) 3022 errx(EX_DATAERR, "bad netmask ``%s''", p); 3023 break; 3024 case '/': 3025 masklen = atoi(p); 3026 if (masklen == 0) 3027 d[1] = htonl(0U); /* mask */ 3028 else if (masklen > 32) 3029 errx(EX_DATAERR, "bad width ``%s''", p); 3030 else 3031 d[1] = htonl(~0U << (32 - masklen)); 3032 break; 3033 case '{': /* no mask, assume /24 and put back the '{' */ 3034 d[1] = htonl(~0U << (32 - 24)); 3035 *(--p) = md; 3036 break; 3037 3038 case ',': /* single address plus continuation */ 3039 *(--p) = md; 3040 /* FALLTHROUGH */ 3041 case 0: /* initialization value */ 3042 default: 3043 d[1] = htonl(~0U); /* force /32 */ 3044 break; 3045 } 3046 d[0] &= d[1]; /* mask base address with mask */ 3047 if (t) 3048 *t = nd; 3049 /* find next separator */ 3050 if (p) 3051 p = strpbrk(p, ",{"); 3052 if (p && *p == '{') { 3053 /* 3054 * We have a set of addresses. They are stored as follows: 3055 * arg1 is the set size (powers of 2, 2..256) 3056 * addr is the base address IN HOST FORMAT 3057 * mask.. is an array of arg1 bits (rounded up to 3058 * the next multiple of 32) with bits set 3059 * for each host in the map. 3060 */ 3061 uint32_t *map = (uint32_t *)&cmd->mask; 3062 int low, high; 3063 int i = contigmask((uint8_t *)&(d[1]), 32); 3064 3065 if (len > 0) 3066 errx(EX_DATAERR, "address set cannot be in a list"); 3067 if (i < 24 || i > 31) 3068 errx(EX_DATAERR, "invalid set with mask %d\n", i); 3069 cmd->o.arg1 = 1<<(32-i); /* map length */ 3070 d[0] = ntohl(d[0]); /* base addr in host format */ 3071 cmd->o.opcode = O_IP_DST_SET; /* default */ 3072 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32) + (cmd->o.arg1+31)/32; 3073 for (i = 0; i < (cmd->o.arg1+31)/32 ; i++) 3074 map[i] = 0; /* clear map */ 3075 3076 av = p + 1; 3077 low = d[0] & 0xff; 3078 high = low + cmd->o.arg1 - 1; 3079 /* 3080 * Here, i stores the previous value when we specify a range 3081 * of addresses within a mask, e.g. 45-63. i = -1 means we 3082 * have no previous value. 3083 */ 3084 i = -1; /* previous value in a range */ 3085 while (isdigit(*av)) { 3086 char *s; 3087 int a = strtol(av, &s, 0); 3088 3089 if (s == av) { /* no parameter */ 3090 if (*av != '}') 3091 errx(EX_DATAERR, "set not closed\n"); 3092 if (i != -1) 3093 errx(EX_DATAERR, "incomplete range %d-", i); 3094 break; 3095 } 3096 if (a < low || a > high) 3097 errx(EX_DATAERR, "addr %d out of range [%d-%d]\n", 3098 a, low, high); 3099 a -= low; 3100 if (i == -1) /* no previous in range */ 3101 i = a; 3102 else { /* check that range is valid */ 3103 if (i > a) 3104 errx(EX_DATAERR, "invalid range %d-%d", 3105 i+low, a+low); 3106 if (*s == '-') 3107 errx(EX_DATAERR, "double '-' in range"); 3108 } 3109 for (; i <= a; i++) 3110 map[i/32] |= 1<<(i & 31); 3111 i = -1; 3112 if (*s == '-') 3113 i = a; 3114 else if (*s == '}') 3115 break; 3116 av = s+1; 3117 } 3118 return; 3119 } 3120 av = p; 3121 if (av) /* then *av must be a ',' */ 3122 av++; 3123 3124 /* Check this entry */ 3125 if (d[1] == 0) { /* "any", specified as x.x.x.x/0 */ 3126 /* 3127 * 'any' turns the entire list into a NOP. 3128 * 'not any' never matches, so it is removed from the 3129 * list unless it is the only item, in which case we 3130 * report an error. 3131 */ 3132 if (cmd->o.len & F_NOT) { /* "not any" never matches */ 3133 if (av == NULL && len == 0) /* only this entry */ 3134 errx(EX_DATAERR, "not any never matches"); 3135 } 3136 /* else do nothing and skip this entry */ 3137 return; 3138 } 3139 /* A single IP can be stored in an optimized format */ 3140 if (d[1] == (uint32_t)~0 && av == NULL && len == 0) { 3141 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32); 3142 return; 3143 } 3144 len += 2; /* two words... */ 3145 d += 2; 3146 } /* end while */ 3147 if (len + 1 > F_LEN_MASK) 3148 errx(EX_DATAERR, "address list too long"); 3149 cmd->o.len |= len+1; 3150} 3151 3152 3153/* n2mask sets n bits of the mask */ 3154void 3155n2mask(struct in6_addr *mask, int n) 3156{ 3157 static int minimask[9] = 3158 { 0x00, 0x80, 0xc0, 0xe0, 0xf0, 0xf8, 0xfc, 0xfe, 0xff }; 3159 u_char *p; 3160 3161 memset(mask, 0, sizeof(struct in6_addr)); 3162 p = (u_char *) mask; 3163 for (; n > 0; p++, n -= 8) { 3164 if (n >= 8) 3165 *p = 0xff; 3166 else 3167 *p = minimask[n]; 3168 } 3169 return; 3170} 3171 3172static void 3173fill_flags_cmd(ipfw_insn *cmd, enum ipfw_opcodes opcode, 3174 struct _s_x *flags, char *p) 3175{ 3176 char *e; 3177 uint32_t set = 0, clear = 0; 3178 3179 if (fill_flags(flags, p, &e, &set, &clear) != 0) 3180 errx(EX_DATAERR, "invalid flag %s", e); 3181 3182 cmd->opcode = opcode; 3183 cmd->len = (cmd->len & (F_NOT | F_OR)) | 1; 3184 cmd->arg1 = (set & 0xff) | ( (clear & 0xff) << 8); 3185} 3186 3187 3188void 3189ipfw_delete(char *av[]) 3190{ 3191 ipfw_range_tlv rt; 3192 char *sep; 3193 int i, j; 3194 int exitval = EX_OK; 3195 int do_set = 0; 3196 3197 av++; 3198 NEED1("missing rule specification"); 3199 if ( *av && _substrcmp(*av, "set") == 0) { 3200 /* Do not allow using the following syntax: 3201 * ipfw set N delete set M 3202 */ 3203 if (co.use_set) 3204 errx(EX_DATAERR, "invalid syntax"); 3205 do_set = 1; /* delete set */ 3206 av++; 3207 } 3208 3209 /* Rule number */ 3210 while (*av && isdigit(**av)) { 3211 i = strtol(*av, &sep, 10); 3212 j = i; 3213 if (*sep== '-') 3214 j = strtol(sep + 1, NULL, 10); 3215 av++; 3216 if (co.do_nat) { 3217 exitval = do_cmd(IP_FW_NAT_DEL, &i, sizeof i); 3218 if (exitval) { 3219 exitval = EX_UNAVAILABLE; 3220 warn("rule %u not available", i); 3221 } 3222 } else if (co.do_pipe) { 3223 exitval = ipfw_delete_pipe(co.do_pipe, i); 3224 } else { 3225 memset(&rt, 0, sizeof(rt)); 3226 if (do_set != 0) { 3227 rt.set = i & 31; 3228 rt.flags = IPFW_RCFLAG_SET; 3229 } else { 3230 rt.start_rule = i & 0xffff; 3231 rt.end_rule = j & 0xffff; 3232 if (rt.start_rule == 0 && rt.end_rule == 0) 3233 rt.flags |= IPFW_RCFLAG_ALL; 3234 else 3235 rt.flags |= IPFW_RCFLAG_RANGE; 3236 if (co.use_set != 0) { 3237 rt.set = co.use_set - 1; 3238 rt.flags |= IPFW_RCFLAG_SET; 3239 } 3240 } 3241 i = do_range_cmd(IP_FW_XDEL, &rt); 3242 if (i != 0) { 3243 exitval = EX_UNAVAILABLE; 3244 warn("rule %u: setsockopt(IP_FW_XDEL)", 3245 rt.start_rule); 3246 } else if (rt.new_set == 0 && do_set == 0) { 3247 exitval = EX_UNAVAILABLE; 3248 if (rt.start_rule != rt.end_rule) 3249 warnx("no rules rules in %u-%u range", 3250 rt.start_rule, rt.end_rule); 3251 else 3252 warnx("rule %u not found", 3253 rt.start_rule); 3254 } 3255 } 3256 } 3257 if (exitval != EX_OK) 3258 exit(exitval); 3259} 3260 3261 3262/* 3263 * fill the interface structure. We do not check the name as we can 3264 * create interfaces dynamically, so checking them at insert time 3265 * makes relatively little sense. 3266 * Interface names containing '*', '?', or '[' are assumed to be shell 3267 * patterns which match interfaces. 3268 */ 3269static void 3270fill_iface(ipfw_insn_if *cmd, char *arg, int cblen, struct tidx *tstate) 3271{ 3272 char *p; 3273 uint16_t uidx; 3274 3275 cmd->name[0] = '\0'; 3276 cmd->o.len |= F_INSN_SIZE(ipfw_insn_if); 3277 3278 CHECK_CMDLEN; 3279 3280 /* Parse the interface or address */ 3281 if (strcmp(arg, "any") == 0) 3282 cmd->o.len = 0; /* effectively ignore this command */ 3283 else if (strncmp(arg, "table(", 6) == 0) { 3284 if ((p = strchr(arg + 6, ')')) == NULL) 3285 errx(EX_DATAERR, "forgotten parenthesis: '%s'", arg); 3286 *p = '\0'; 3287 p = strchr(arg + 6, ','); 3288 if (p) 3289 *p++ = '\0'; 3290 if ((uidx = pack_table(tstate, arg + 6)) == 0) 3291 errx(EX_DATAERR, "Invalid table name: %s", arg + 6); 3292 3293 cmd->name[0] = '\1'; /* Special value indicating table */ 3294 cmd->p.kidx = uidx; 3295 } else if (!isdigit(*arg)) { 3296 strlcpy(cmd->name, arg, sizeof(cmd->name)); 3297 cmd->p.glob = strpbrk(arg, "*?[") != NULL ? 1 : 0; 3298 } else if (!inet_aton(arg, &cmd->p.ip)) 3299 errx(EX_DATAERR, "bad ip address ``%s''", arg); 3300} 3301 3302static void 3303get_mac_addr_mask(const char *p, uint8_t *addr, uint8_t *mask) 3304{ 3305 int i; 3306 size_t l; 3307 char *ap, *ptr, *optr; 3308 struct ether_addr *mac; 3309 const char *macset = "0123456789abcdefABCDEF:"; 3310 3311 if (strcmp(p, "any") == 0) { 3312 for (i = 0; i < ETHER_ADDR_LEN; i++) 3313 addr[i] = mask[i] = 0; 3314 return; 3315 } 3316 3317 optr = ptr = strdup(p); 3318 if ((ap = strsep(&ptr, "&/")) != NULL && *ap != 0) { 3319 l = strlen(ap); 3320 if (strspn(ap, macset) != l || (mac = ether_aton(ap)) == NULL) 3321 errx(EX_DATAERR, "Incorrect MAC address"); 3322 bcopy(mac, addr, ETHER_ADDR_LEN); 3323 } else 3324 errx(EX_DATAERR, "Incorrect MAC address"); 3325 3326 if (ptr != NULL) { /* we have mask? */ 3327 if (p[ptr - optr - 1] == '/') { /* mask len */ 3328 long ml = strtol(ptr, &ap, 10); 3329 if (*ap != 0 || ml > ETHER_ADDR_LEN * 8 || ml < 0) 3330 errx(EX_DATAERR, "Incorrect mask length"); 3331 for (i = 0; ml > 0 && i < ETHER_ADDR_LEN; ml -= 8, i++) 3332 mask[i] = (ml >= 8) ? 0xff: (~0) << (8 - ml); 3333 } else { /* mask */ 3334 l = strlen(ptr); 3335 if (strspn(ptr, macset) != l || 3336 (mac = ether_aton(ptr)) == NULL) 3337 errx(EX_DATAERR, "Incorrect mask"); 3338 bcopy(mac, mask, ETHER_ADDR_LEN); 3339 } 3340 } else { /* default mask: ff:ff:ff:ff:ff:ff */ 3341 for (i = 0; i < ETHER_ADDR_LEN; i++) 3342 mask[i] = 0xff; 3343 } 3344 for (i = 0; i < ETHER_ADDR_LEN; i++) 3345 addr[i] &= mask[i]; 3346 3347 free(optr); 3348} 3349 3350/* 3351 * helper function, updates the pointer to cmd with the length 3352 * of the current command, and also cleans up the first word of 3353 * the new command in case it has been clobbered before. 3354 */ 3355static ipfw_insn * 3356next_cmd(ipfw_insn *cmd, int *len) 3357{ 3358 *len -= F_LEN(cmd); 3359 CHECK_LENGTH(*len, 0); 3360 cmd += F_LEN(cmd); 3361 bzero(cmd, sizeof(*cmd)); 3362 return cmd; 3363} 3364 3365/* 3366 * Takes arguments and copies them into a comment 3367 */ 3368static void 3369fill_comment(ipfw_insn *cmd, char **av, int cblen) 3370{ 3371 int i, l; 3372 char *p = (char *)(cmd + 1); 3373 3374 cmd->opcode = O_NOP; 3375 cmd->len = (cmd->len & (F_NOT | F_OR)); 3376 3377 /* Compute length of comment string. */ 3378 for (i = 0, l = 0; av[i] != NULL; i++) 3379 l += strlen(av[i]) + 1; 3380 if (l == 0) 3381 return; 3382 if (l > 84) 3383 errx(EX_DATAERR, 3384 "comment too long (max 80 chars)"); 3385 l = 1 + (l+3)/4; 3386 cmd->len = (cmd->len & (F_NOT | F_OR)) | l; 3387 CHECK_CMDLEN; 3388 3389 for (i = 0; av[i] != NULL; i++) { 3390 strcpy(p, av[i]); 3391 p += strlen(av[i]); 3392 *p++ = ' '; 3393 } 3394 *(--p) = '\0'; 3395} 3396 3397/* 3398 * A function to fill simple commands of size 1. 3399 * Existing flags are preserved. 3400 */ 3401static void 3402fill_cmd(ipfw_insn *cmd, enum ipfw_opcodes opcode, int flags, uint16_t arg) 3403{ 3404 cmd->opcode = opcode; 3405 cmd->len = ((cmd->len | flags) & (F_NOT | F_OR)) | 1; 3406 cmd->arg1 = arg; 3407} 3408 3409/* 3410 * Fetch and add the MAC address and type, with masks. This generates one or 3411 * two microinstructions, and returns the pointer to the last one. 3412 */ 3413static ipfw_insn * 3414add_mac(ipfw_insn *cmd, char *av[], int cblen) 3415{ 3416 ipfw_insn_mac *mac; 3417 3418 if ( ( av[0] == NULL ) || ( av[1] == NULL ) ) 3419 errx(EX_DATAERR, "MAC dst src"); 3420 3421 cmd->opcode = O_MACADDR2; 3422 cmd->len = (cmd->len & (F_NOT | F_OR)) | F_INSN_SIZE(ipfw_insn_mac); 3423 CHECK_CMDLEN; 3424 3425 mac = (ipfw_insn_mac *)cmd; 3426 get_mac_addr_mask(av[0], mac->addr, mac->mask); /* dst */ 3427 get_mac_addr_mask(av[1], &(mac->addr[ETHER_ADDR_LEN]), 3428 &(mac->mask[ETHER_ADDR_LEN])); /* src */ 3429 return cmd; 3430} 3431 3432static ipfw_insn * 3433add_mactype(ipfw_insn *cmd, char *av, int cblen) 3434{ 3435 if (!av) 3436 errx(EX_DATAERR, "missing MAC type"); 3437 if (strcmp(av, "any") != 0) { /* we have a non-null type */ 3438 fill_newports((ipfw_insn_u16 *)cmd, av, IPPROTO_ETHERTYPE, 3439 cblen); 3440 cmd->opcode = O_MAC_TYPE; 3441 return cmd; 3442 } else 3443 return NULL; 3444} 3445 3446static ipfw_insn * 3447add_proto0(ipfw_insn *cmd, char *av, u_char *protop) 3448{ 3449 struct protoent *pe; 3450 char *ep; 3451 int proto; 3452 3453 proto = strtol(av, &ep, 10); 3454 if (*ep != '\0' || proto <= 0) { 3455 if ((pe = getprotobyname(av)) == NULL) 3456 return NULL; 3457 proto = pe->p_proto; 3458 } 3459 3460 fill_cmd(cmd, O_PROTO, 0, proto); 3461 *protop = proto; 3462 return cmd; 3463} 3464 3465static ipfw_insn * 3466add_proto(ipfw_insn *cmd, char *av, u_char *protop) 3467{ 3468 u_char proto = IPPROTO_IP; 3469 3470 if (_substrcmp(av, "all") == 0 || strcmp(av, "ip") == 0) 3471 ; /* do not set O_IP4 nor O_IP6 */ 3472 else if (strcmp(av, "ip4") == 0) 3473 /* explicit "just IPv4" rule */ 3474 fill_cmd(cmd, O_IP4, 0, 0); 3475 else if (strcmp(av, "ip6") == 0) { 3476 /* explicit "just IPv6" rule */ 3477 proto = IPPROTO_IPV6; 3478 fill_cmd(cmd, O_IP6, 0, 0); 3479 } else 3480 return add_proto0(cmd, av, protop); 3481 3482 *protop = proto; 3483 return cmd; 3484} 3485 3486static ipfw_insn * 3487add_proto_compat(ipfw_insn *cmd, char *av, u_char *protop) 3488{ 3489 u_char proto = IPPROTO_IP; 3490 3491 if (_substrcmp(av, "all") == 0 || strcmp(av, "ip") == 0) 3492 ; /* do not set O_IP4 nor O_IP6 */ 3493 else if (strcmp(av, "ipv4") == 0 || strcmp(av, "ip4") == 0) 3494 /* explicit "just IPv4" rule */ 3495 fill_cmd(cmd, O_IP4, 0, 0); 3496 else if (strcmp(av, "ipv6") == 0 || strcmp(av, "ip6") == 0) { 3497 /* explicit "just IPv6" rule */ 3498 proto = IPPROTO_IPV6; 3499 fill_cmd(cmd, O_IP6, 0, 0); 3500 } else 3501 return add_proto0(cmd, av, protop); 3502 3503 *protop = proto; 3504 return cmd; 3505} 3506 3507static ipfw_insn * 3508add_srcip(ipfw_insn *cmd, char *av, int cblen, struct tidx *tstate) 3509{ 3510 fill_ip((ipfw_insn_ip *)cmd, av, cblen, tstate); 3511 if (cmd->opcode == O_IP_DST_SET) /* set */ 3512 cmd->opcode = O_IP_SRC_SET; 3513 else if (cmd->opcode == O_IP_DST_LOOKUP) /* table */ 3514 cmd->opcode = O_IP_SRC_LOOKUP; 3515 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn)) /* me */ 3516 cmd->opcode = O_IP_SRC_ME; 3517 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_u32)) /* one IP */ 3518 cmd->opcode = O_IP_SRC; 3519 else /* addr/mask */ 3520 cmd->opcode = O_IP_SRC_MASK; 3521 return cmd; 3522} 3523 3524static ipfw_insn * 3525add_dstip(ipfw_insn *cmd, char *av, int cblen, struct tidx *tstate) 3526{ 3527 fill_ip((ipfw_insn_ip *)cmd, av, cblen, tstate); 3528 if (cmd->opcode == O_IP_DST_SET) /* set */ 3529 ; 3530 else if (cmd->opcode == O_IP_DST_LOOKUP) /* table */ 3531 ; 3532 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn)) /* me */ 3533 cmd->opcode = O_IP_DST_ME; 3534 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_u32)) /* one IP */ 3535 cmd->opcode = O_IP_DST; 3536 else /* addr/mask */ 3537 cmd->opcode = O_IP_DST_MASK; 3538 return cmd; 3539} 3540 3541static struct _s_x f_reserved_keywords[] = { 3542 { "altq", TOK_OR }, 3543 { "//", TOK_OR }, 3544 { "diverted", TOK_OR }, 3545 { "dst-port", TOK_OR }, 3546 { "src-port", TOK_OR }, 3547 { "established", TOK_OR }, 3548 { "keep-state", TOK_OR }, 3549 { "frag", TOK_OR }, 3550 { "icmptypes", TOK_OR }, 3551 { "in", TOK_OR }, 3552 { "out", TOK_OR }, 3553 { "ip6", TOK_OR }, 3554 { "any", TOK_OR }, 3555 { "to", TOK_OR }, 3556 { "via", TOK_OR }, 3557 { "{", TOK_OR }, 3558 { NULL, 0 } /* terminator */ 3559}; 3560 3561static ipfw_insn * 3562add_ports(ipfw_insn *cmd, char *av, u_char proto, int opcode, int cblen) 3563{ 3564 3565 if (match_token(f_reserved_keywords, av) != -1) 3566 return (NULL); 3567 3568 if (fill_newports((ipfw_insn_u16 *)cmd, av, proto, cblen)) { 3569 /* XXX todo: check that we have a protocol with ports */ 3570 cmd->opcode = opcode; 3571 return cmd; 3572 } 3573 return NULL; 3574} 3575 3576static ipfw_insn * 3577add_src(ipfw_insn *cmd, char *av, u_char proto, int cblen, struct tidx *tstate) 3578{ 3579 struct in6_addr a; 3580 char *host, *ch, buf[INET6_ADDRSTRLEN]; 3581 ipfw_insn *ret = NULL; 3582 int len; 3583 3584 /* Copy first address in set if needed */ 3585 if ((ch = strpbrk(av, "/,")) != NULL) { 3586 len = ch - av; 3587 strlcpy(buf, av, sizeof(buf)); 3588 if (len < sizeof(buf)) 3589 buf[len] = '\0'; 3590 host = buf; 3591 } else 3592 host = av; 3593 3594 if (proto == IPPROTO_IPV6 || strcmp(av, "me6") == 0 || 3595 inet_pton(AF_INET6, host, &a) == 1) 3596 ret = add_srcip6(cmd, av, cblen, tstate); 3597 /* XXX: should check for IPv4, not !IPv6 */ 3598 if (ret == NULL && (proto == IPPROTO_IP || strcmp(av, "me") == 0 || 3599 inet_pton(AF_INET6, host, &a) != 1)) 3600 ret = add_srcip(cmd, av, cblen, tstate); 3601 if (ret == NULL && strcmp(av, "any") != 0) 3602 ret = cmd; 3603 3604 return ret; 3605} 3606 3607static ipfw_insn * 3608add_dst(ipfw_insn *cmd, char *av, u_char proto, int cblen, struct tidx *tstate) 3609{ 3610 struct in6_addr a; 3611 char *host, *ch, buf[INET6_ADDRSTRLEN]; 3612 ipfw_insn *ret = NULL; 3613 int len; 3614 3615 /* Copy first address in set if needed */ 3616 if ((ch = strpbrk(av, "/,")) != NULL) { 3617 len = ch - av; 3618 strlcpy(buf, av, sizeof(buf)); 3619 if (len < sizeof(buf)) 3620 buf[len] = '\0'; 3621 host = buf; 3622 } else 3623 host = av; 3624 3625 if (proto == IPPROTO_IPV6 || strcmp(av, "me6") == 0 || 3626 inet_pton(AF_INET6, host, &a) == 1) 3627 ret = add_dstip6(cmd, av, cblen, tstate); 3628 /* XXX: should check for IPv4, not !IPv6 */ 3629 if (ret == NULL && (proto == IPPROTO_IP || strcmp(av, "me") == 0 || 3630 inet_pton(AF_INET6, host, &a) != 1)) 3631 ret = add_dstip(cmd, av, cblen, tstate); 3632 if (ret == NULL && strcmp(av, "any") != 0) 3633 ret = cmd; 3634 3635 return ret; 3636} 3637 3638/* 3639 * Parse arguments and assemble the microinstructions which make up a rule. 3640 * Rules are added into the 'rulebuf' and then copied in the correct order 3641 * into the actual rule. 3642 * 3643 * The syntax for a rule starts with the action, followed by 3644 * optional action parameters, and the various match patterns. 3645 * In the assembled microcode, the first opcode must be an O_PROBE_STATE 3646 * (generated if the rule includes a keep-state option), then the 3647 * various match patterns, log/altq actions, and the actual action. 3648 * 3649 */ 3650void 3651compile_rule(char *av[], uint32_t *rbuf, int *rbufsize, struct tidx *tstate) 3652{ 3653 /* 3654 * rules are added into the 'rulebuf' and then copied in 3655 * the correct order into the actual rule. 3656 * Some things that need to go out of order (prob, action etc.) 3657 * go into actbuf[]. 3658 */ 3659 static uint32_t actbuf[255], cmdbuf[255]; 3660 int rblen, ablen, cblen; 3661 3662 ipfw_insn *src, *dst, *cmd, *action, *prev=NULL; 3663 ipfw_insn *first_cmd; /* first match pattern */ 3664 3665 struct ip_fw_rule *rule; 3666 3667 /* 3668 * various flags used to record that we entered some fields. 3669 */ 3670 ipfw_insn *have_state = NULL; /* check-state or keep-state */ 3671 ipfw_insn *have_log = NULL, *have_altq = NULL, *have_tag = NULL; 3672 size_t len; 3673 3674 int i; 3675 3676 int open_par = 0; /* open parenthesis ( */ 3677 3678 /* proto is here because it is used to fetch ports */ 3679 u_char proto = IPPROTO_IP; /* default protocol */ 3680 3681 double match_prob = 1; /* match probability, default is always match */ 3682 3683 bzero(actbuf, sizeof(actbuf)); /* actions go here */ 3684 bzero(cmdbuf, sizeof(cmdbuf)); 3685 bzero(rbuf, *rbufsize); 3686 3687 rule = (struct ip_fw_rule *)rbuf; 3688 cmd = (ipfw_insn *)cmdbuf; 3689 action = (ipfw_insn *)actbuf; 3690 3691 rblen = *rbufsize / sizeof(uint32_t); 3692 rblen -= sizeof(struct ip_fw_rule) / sizeof(uint32_t); 3693 ablen = sizeof(actbuf) / sizeof(actbuf[0]); 3694 cblen = sizeof(cmdbuf) / sizeof(cmdbuf[0]); 3695 cblen -= F_INSN_SIZE(ipfw_insn_u32) + 1; 3696 3697#define CHECK_RBUFLEN(len) { CHECK_LENGTH(rblen, len); rblen -= len; } 3698#define CHECK_ACTLEN CHECK_LENGTH(ablen, action->len) 3699 3700 av++; 3701 3702 /* [rule N] -- Rule number optional */ 3703 if (av[0] && isdigit(**av)) { 3704 rule->rulenum = atoi(*av); 3705 av++; 3706 } 3707 3708 /* [set N] -- set number (0..RESVD_SET), optional */ 3709 if (av[0] && av[1] && _substrcmp(*av, "set") == 0) { 3710 int set = strtoul(av[1], NULL, 10); 3711 if (set < 0 || set > RESVD_SET) 3712 errx(EX_DATAERR, "illegal set %s", av[1]); 3713 rule->set = set; 3714 tstate->set = set; 3715 av += 2; 3716 } 3717 3718 /* [prob D] -- match probability, optional */ 3719 if (av[0] && av[1] && _substrcmp(*av, "prob") == 0) { 3720 match_prob = strtod(av[1], NULL); 3721 3722 if (match_prob <= 0 || match_prob > 1) 3723 errx(EX_DATAERR, "illegal match prob. %s", av[1]); 3724 av += 2; 3725 } 3726 3727 /* action -- mandatory */ 3728 NEED1("missing action"); 3729 i = match_token(rule_actions, *av); 3730 av++; 3731 action->len = 1; /* default */ 3732 CHECK_ACTLEN; 3733 switch(i) { 3734 case TOK_CHECKSTATE: 3735 have_state = action; 3736 action->opcode = O_CHECK_STATE; 3737 if (*av == NULL || 3738 match_token(rule_options, *av) == TOK_COMMENT) { 3739 action->arg1 = pack_object(tstate, 3740 default_state_name, IPFW_TLV_STATE_NAME); 3741 break; 3742 } 3743 if (*av[0] == ':') { 3744 if (strcmp(*av + 1, "any") == 0) 3745 action->arg1 = 0; 3746 else if (state_check_name(*av + 1) == 0) 3747 action->arg1 = pack_object(tstate, *av + 1, 3748 IPFW_TLV_STATE_NAME); 3749 else 3750 errx(EX_DATAERR, "Invalid state name %s", 3751 *av); 3752 av++; 3753 break; 3754 } 3755 errx(EX_DATAERR, "Invalid state name %s", *av); 3756 break; 3757 3758 case TOK_ACCEPT: 3759 action->opcode = O_ACCEPT; 3760 break; 3761 3762 case TOK_DENY: 3763 action->opcode = O_DENY; 3764 action->arg1 = 0; 3765 break; 3766 3767 case TOK_REJECT: 3768 action->opcode = O_REJECT; 3769 action->arg1 = ICMP_UNREACH_HOST; 3770 break; 3771 3772 case TOK_RESET: 3773 action->opcode = O_REJECT; 3774 action->arg1 = ICMP_REJECT_RST; 3775 break; 3776 3777 case TOK_RESET6: 3778 action->opcode = O_UNREACH6; 3779 action->arg1 = ICMP6_UNREACH_RST; 3780 break; 3781 3782 case TOK_UNREACH: 3783 action->opcode = O_REJECT; 3784 NEED1("missing reject code"); 3785 fill_reject_code(&action->arg1, *av); 3786 av++; 3787 break; 3788 3789 case TOK_UNREACH6: 3790 action->opcode = O_UNREACH6; 3791 NEED1("missing unreach code"); 3792 fill_unreach6_code(&action->arg1, *av); 3793 av++; 3794 break; 3795 3796 case TOK_COUNT: 3797 action->opcode = O_COUNT; 3798 break; 3799 3800 case TOK_NAT: 3801 action->opcode = O_NAT; 3802 action->len = F_INSN_SIZE(ipfw_insn_nat); 3803 CHECK_ACTLEN; 3804 if (*av != NULL && _substrcmp(*av, "global") == 0) { 3805 action->arg1 = IP_FW_NAT44_GLOBAL; 3806 av++; 3807 break; 3808 } else 3809 goto chkarg; 3810 case TOK_QUEUE: 3811 action->opcode = O_QUEUE; 3812 goto chkarg; 3813 case TOK_PIPE: 3814 action->opcode = O_PIPE; 3815 goto chkarg; 3816 case TOK_SKIPTO: 3817 action->opcode = O_SKIPTO; 3818 goto chkarg; 3819 case TOK_NETGRAPH: 3820 action->opcode = O_NETGRAPH; 3821 goto chkarg; 3822 case TOK_NGTEE: 3823 action->opcode = O_NGTEE; 3824 goto chkarg; 3825 case TOK_DIVERT: 3826 action->opcode = O_DIVERT; 3827 goto chkarg; 3828 case TOK_TEE: 3829 action->opcode = O_TEE; 3830 goto chkarg; 3831 case TOK_CALL: 3832 action->opcode = O_CALLRETURN; 3833chkarg: 3834 if (!av[0]) 3835 errx(EX_USAGE, "missing argument for %s", *(av - 1)); 3836 if (isdigit(**av)) { 3837 action->arg1 = strtoul(*av, NULL, 10); 3838 if (action->arg1 <= 0 || action->arg1 >= IP_FW_TABLEARG) 3839 errx(EX_DATAERR, "illegal argument for %s", 3840 *(av - 1)); 3841 } else if (_substrcmp(*av, "tablearg") == 0) { 3842 action->arg1 = IP_FW_TARG; 3843 } else if (i == TOK_DIVERT || i == TOK_TEE) { 3844 struct servent *s; 3845 setservent(1); 3846 s = getservbyname(av[0], "divert"); 3847 if (s != NULL) 3848 action->arg1 = ntohs(s->s_port); 3849 else 3850 errx(EX_DATAERR, "illegal divert/tee port"); 3851 } else 3852 errx(EX_DATAERR, "illegal argument for %s", *(av - 1)); 3853 av++; 3854 break; 3855 3856 case TOK_FORWARD: { 3857 /* 3858 * Locate the address-port separator (':' or ','). 3859 * Could be one of the following: 3860 * hostname:port 3861 * IPv4 a.b.c.d,port 3862 * IPv4 a.b.c.d:port 3863 * IPv6 w:x:y::z,port 3864 * The ':' can only be used with hostname and IPv4 address. 3865 * XXX-BZ Should we also support [w:x:y::z]:port? 3866 */ 3867 struct sockaddr_storage result; 3868 struct addrinfo *res; 3869 char *s, *end; 3870 int family; 3871 u_short port_number; 3872 3873 NEED1("missing forward address[:port]"); 3874 3875 /* 3876 * locate the address-port separator (':' or ',') 3877 */ 3878 s = strchr(*av, ','); 3879 if (s == NULL) { 3880 /* Distinguish between IPv4:port and IPv6 cases. */ 3881 s = strchr(*av, ':'); 3882 if (s && strchr(s+1, ':')) 3883 s = NULL; /* no port */ 3884 } 3885 3886 port_number = 0; 3887 if (s != NULL) { 3888 /* Terminate host portion and set s to start of port. */ 3889 *(s++) = '\0'; 3890 i = strtoport(s, &end, 0 /* base */, 0 /* proto */); 3891 if (s == end) 3892 errx(EX_DATAERR, 3893 "illegal forwarding port ``%s''", s); 3894 port_number = (u_short)i; 3895 } 3896 3897 if (_substrcmp(*av, "tablearg") == 0) { 3898 family = PF_INET; 3899 ((struct sockaddr_in*)&result)->sin_addr.s_addr = 3900 INADDR_ANY; 3901 } else { 3902 /* 3903 * Resolve the host name or address to a family and a 3904 * network representation of the address. 3905 */ 3906 if (getaddrinfo(*av, NULL, NULL, &res)) 3907 errx(EX_DATAERR, NULL); 3908 /* Just use the first host in the answer. */ 3909 family = res->ai_family; 3910 memcpy(&result, res->ai_addr, res->ai_addrlen); 3911 freeaddrinfo(res); 3912 } 3913 3914 if (family == PF_INET) { 3915 ipfw_insn_sa *p = (ipfw_insn_sa *)action; 3916 3917 action->opcode = O_FORWARD_IP; 3918 action->len = F_INSN_SIZE(ipfw_insn_sa); 3919 CHECK_ACTLEN; 3920 3921 /* 3922 * In the kernel we assume AF_INET and use only 3923 * sin_port and sin_addr. Remember to set sin_len as 3924 * the routing code seems to use it too. 3925 */ 3926 p->sa.sin_len = sizeof(struct sockaddr_in); 3927 p->sa.sin_family = AF_INET; 3928 p->sa.sin_port = port_number; 3929 p->sa.sin_addr.s_addr = 3930 ((struct sockaddr_in *)&result)->sin_addr.s_addr; 3931 } else if (family == PF_INET6) { 3932 ipfw_insn_sa6 *p = (ipfw_insn_sa6 *)action; 3933 3934 action->opcode = O_FORWARD_IP6; 3935 action->len = F_INSN_SIZE(ipfw_insn_sa6); 3936 CHECK_ACTLEN; 3937 3938 p->sa.sin6_len = sizeof(struct sockaddr_in6); 3939 p->sa.sin6_family = AF_INET6; 3940 p->sa.sin6_port = port_number; 3941 p->sa.sin6_flowinfo = 0; 3942 p->sa.sin6_scope_id = 3943 ((struct sockaddr_in6 *)&result)->sin6_scope_id; 3944 bcopy(&((struct sockaddr_in6*)&result)->sin6_addr, 3945 &p->sa.sin6_addr, sizeof(p->sa.sin6_addr)); 3946 } else { 3947 errx(EX_DATAERR, "Invalid address family in forward action"); 3948 } 3949 av++; 3950 break; 3951 } 3952 case TOK_COMMENT: 3953 /* pretend it is a 'count' rule followed by the comment */ 3954 action->opcode = O_COUNT; 3955 av--; /* go back... */ 3956 break; 3957 3958 case TOK_SETFIB: 3959 { 3960 int numfibs; 3961 size_t intsize = sizeof(int); 3962 3963 action->opcode = O_SETFIB; 3964 NEED1("missing fib number"); 3965 if (_substrcmp(*av, "tablearg") == 0) { 3966 action->arg1 = IP_FW_TARG; 3967 } else { 3968 action->arg1 = strtoul(*av, NULL, 10); 3969 if (sysctlbyname("net.fibs", &numfibs, &intsize, 3970 NULL, 0) == -1) 3971 errx(EX_DATAERR, "fibs not suported.\n"); 3972 if (action->arg1 >= numfibs) /* Temporary */ 3973 errx(EX_DATAERR, "fib too large.\n"); 3974 /* Add high-order bit to fib to make room for tablearg*/ 3975 action->arg1 |= 0x8000; 3976 } 3977 av++; 3978 break; 3979 } 3980 3981 case TOK_SETDSCP: 3982 { 3983 int code; 3984 3985 action->opcode = O_SETDSCP; 3986 NEED1("missing DSCP code"); 3987 if (_substrcmp(*av, "tablearg") == 0) { 3988 action->arg1 = IP_FW_TARG; 3989 } else { 3990 if (isalpha(*av[0])) { 3991 if ((code = match_token(f_ipdscp, *av)) == -1) 3992 errx(EX_DATAERR, "Unknown DSCP code"); 3993 action->arg1 = code; 3994 } else 3995 action->arg1 = strtoul(*av, NULL, 10); 3996 /* 3997 * Add high-order bit to DSCP to make room 3998 * for tablearg 3999 */ 4000 action->arg1 |= 0x8000; 4001 } 4002 av++; 4003 break; 4004 } 4005 4006 case TOK_REASS: 4007 action->opcode = O_REASS; 4008 break; 4009 4010 case TOK_RETURN: 4011 fill_cmd(action, O_CALLRETURN, F_NOT, 0); 4012 break; 4013 4014 case TOK_TCPSETMSS: { 4015 u_long mss; 4016 uint16_t idx; 4017 4018 idx = pack_object(tstate, "tcp-setmss", IPFW_TLV_EACTION); 4019 if (idx == 0) 4020 errx(EX_DATAERR, "pack_object failed"); 4021 fill_cmd(action, O_EXTERNAL_ACTION, 0, idx); 4022 NEED1("Missing MSS value"); 4023 action = next_cmd(action, &ablen); 4024 action->len = 1; 4025 CHECK_ACTLEN; 4026 mss = strtoul(*av, NULL, 10); 4027 if (mss == 0 || mss > UINT16_MAX) 4028 errx(EX_USAGE, "invalid MSS value %s", *av); 4029 fill_cmd(action, O_EXTERNAL_DATA, 0, (uint16_t)mss); 4030 av++; 4031 break; 4032 } 4033 4034 default: 4035 av--; 4036 if (match_token(rule_eactions, *av) == -1) 4037 errx(EX_DATAERR, "invalid action %s\n", *av); 4038 /* 4039 * External actions support. 4040 * XXX: we support only syntax with instance name. 4041 * For known external actions (from rule_eactions list) 4042 * we can handle syntax directly. But with `eaction' 4043 * keyword we can use only `eaction <name> <instance>' 4044 * syntax. 4045 */ 4046 case TOK_EACTION: { 4047 uint16_t idx; 4048 4049 NEED1("Missing eaction name"); 4050 if (eaction_check_name(*av) != 0) 4051 errx(EX_DATAERR, "Invalid eaction name %s", *av); 4052 idx = pack_object(tstate, *av, IPFW_TLV_EACTION); 4053 if (idx == 0) 4054 errx(EX_DATAERR, "pack_object failed"); 4055 fill_cmd(action, O_EXTERNAL_ACTION, 0, idx); 4056 av++; 4057 NEED1("Missing eaction instance name"); 4058 action = next_cmd(action, &ablen); 4059 action->len = 1; 4060 CHECK_ACTLEN; 4061 if (eaction_check_name(*av) != 0) 4062 errx(EX_DATAERR, "Invalid eaction instance name %s", 4063 *av); 4064 /* 4065 * External action instance object has TLV type depended 4066 * from the external action name object index. Since we 4067 * currently don't know this index, use zero as TLV type. 4068 */ 4069 idx = pack_object(tstate, *av, 0); 4070 if (idx == 0) 4071 errx(EX_DATAERR, "pack_object failed"); 4072 fill_cmd(action, O_EXTERNAL_INSTANCE, 0, idx); 4073 av++; 4074 } 4075 } 4076 action = next_cmd(action, &ablen); 4077 4078 /* 4079 * [altq queuename] -- altq tag, optional 4080 * [log [logamount N]] -- log, optional 4081 * 4082 * If they exist, it go first in the cmdbuf, but then it is 4083 * skipped in the copy section to the end of the buffer. 4084 */ 4085 while (av[0] != NULL && (i = match_token(rule_action_params, *av)) != -1) { 4086 av++; 4087 switch (i) { 4088 case TOK_LOG: 4089 { 4090 ipfw_insn_log *c = (ipfw_insn_log *)cmd; 4091 int l; 4092 4093 if (have_log) 4094 errx(EX_DATAERR, 4095 "log cannot be specified more than once"); 4096 have_log = (ipfw_insn *)c; 4097 cmd->len = F_INSN_SIZE(ipfw_insn_log); 4098 CHECK_CMDLEN; 4099 cmd->opcode = O_LOG; 4100 if (av[0] && _substrcmp(*av, "logamount") == 0) { 4101 av++; 4102 NEED1("logamount requires argument"); 4103 l = atoi(*av); 4104 if (l < 0) 4105 errx(EX_DATAERR, 4106 "logamount must be positive"); 4107 c->max_log = l; 4108 av++; 4109 } else { 4110 len = sizeof(c->max_log); 4111 if (sysctlbyname("net.inet.ip.fw.verbose_limit", 4112 &c->max_log, &len, NULL, 0) == -1) { 4113 if (co.test_only) { 4114 c->max_log = 0; 4115 break; 4116 } 4117 errx(1, "sysctlbyname(\"%s\")", 4118 "net.inet.ip.fw.verbose_limit"); 4119 } 4120 } 4121 } 4122 break; 4123 4124#ifndef NO_ALTQ 4125 case TOK_ALTQ: 4126 { 4127 ipfw_insn_altq *a = (ipfw_insn_altq *)cmd; 4128 4129 NEED1("missing altq queue name"); 4130 if (have_altq) 4131 errx(EX_DATAERR, 4132 "altq cannot be specified more than once"); 4133 have_altq = (ipfw_insn *)a; 4134 cmd->len = F_INSN_SIZE(ipfw_insn_altq); 4135 CHECK_CMDLEN; 4136 cmd->opcode = O_ALTQ; 4137 a->qid = altq_name_to_qid(*av); 4138 av++; 4139 } 4140 break; 4141#endif 4142 4143 case TOK_TAG: 4144 case TOK_UNTAG: { 4145 uint16_t tag; 4146 4147 if (have_tag) 4148 errx(EX_USAGE, "tag and untag cannot be " 4149 "specified more than once"); 4150 GET_UINT_ARG(tag, IPFW_ARG_MIN, IPFW_ARG_MAX, i, 4151 rule_action_params); 4152 have_tag = cmd; 4153 fill_cmd(cmd, O_TAG, (i == TOK_TAG) ? 0: F_NOT, tag); 4154 av++; 4155 break; 4156 } 4157 4158 default: 4159 abort(); 4160 } 4161 cmd = next_cmd(cmd, &cblen); 4162 } 4163 4164 if (have_state) { /* must be a check-state, we are done */ 4165 if (*av != NULL && 4166 match_token(rule_options, *av) == TOK_COMMENT) { 4167 /* check-state has a comment */ 4168 av++; 4169 fill_comment(cmd, av, cblen); 4170 cmd = next_cmd(cmd, &cblen); 4171 av[0] = NULL; 4172 } 4173 goto done; 4174 } 4175 4176#define OR_START(target) \ 4177 if (av[0] && (*av[0] == '(' || *av[0] == '{')) { \ 4178 if (open_par) \ 4179 errx(EX_USAGE, "nested \"(\" not allowed\n"); \ 4180 prev = NULL; \ 4181 open_par = 1; \ 4182 if ( (av[0])[1] == '\0') { \ 4183 av++; \ 4184 } else \ 4185 (*av)++; \ 4186 } \ 4187 target: \ 4188 4189 4190#define CLOSE_PAR \ 4191 if (open_par) { \ 4192 if (av[0] && ( \ 4193 strcmp(*av, ")") == 0 || \ 4194 strcmp(*av, "}") == 0)) { \ 4195 prev = NULL; \ 4196 open_par = 0; \ 4197 av++; \ 4198 } else \ 4199 errx(EX_USAGE, "missing \")\"\n"); \ 4200 } 4201 4202#define NOT_BLOCK \ 4203 if (av[0] && _substrcmp(*av, "not") == 0) { \ 4204 if (cmd->len & F_NOT) \ 4205 errx(EX_USAGE, "double \"not\" not allowed\n"); \ 4206 cmd->len |= F_NOT; \ 4207 av++; \ 4208 } 4209 4210#define OR_BLOCK(target) \ 4211 if (av[0] && _substrcmp(*av, "or") == 0) { \ 4212 if (prev == NULL || open_par == 0) \ 4213 errx(EX_DATAERR, "invalid OR block"); \ 4214 prev->len |= F_OR; \ 4215 av++; \ 4216 goto target; \ 4217 } \ 4218 CLOSE_PAR; 4219 4220 first_cmd = cmd; 4221 4222#if 0 4223 /* 4224 * MAC addresses, optional. 4225 * If we have this, we skip the part "proto from src to dst" 4226 * and jump straight to the option parsing. 4227 */ 4228 NOT_BLOCK; 4229 NEED1("missing protocol"); 4230 if (_substrcmp(*av, "MAC") == 0 || 4231 _substrcmp(*av, "mac") == 0) { 4232 av++; /* the "MAC" keyword */ 4233 add_mac(cmd, av); /* exits in case of errors */ 4234 cmd = next_cmd(cmd); 4235 av += 2; /* dst-mac and src-mac */ 4236 NOT_BLOCK; 4237 NEED1("missing mac type"); 4238 if (add_mactype(cmd, av[0])) 4239 cmd = next_cmd(cmd); 4240 av++; /* any or mac-type */ 4241 goto read_options; 4242 } 4243#endif 4244 4245 /* 4246 * protocol, mandatory 4247 */ 4248 OR_START(get_proto); 4249 NOT_BLOCK; 4250 NEED1("missing protocol"); 4251 if (add_proto_compat(cmd, *av, &proto)) { 4252 av++; 4253 if (F_LEN(cmd) != 0) { 4254 prev = cmd; 4255 cmd = next_cmd(cmd, &cblen); 4256 } 4257 } else if (first_cmd != cmd) { 4258 errx(EX_DATAERR, "invalid protocol ``%s''", *av); 4259 } else 4260 goto read_options; 4261 OR_BLOCK(get_proto); 4262 4263 /* 4264 * "from", mandatory 4265 */ 4266 if ((av[0] == NULL) || _substrcmp(*av, "from") != 0) 4267 errx(EX_USAGE, "missing ``from''"); 4268 av++; 4269 4270 /* 4271 * source IP, mandatory 4272 */ 4273 OR_START(source_ip); 4274 NOT_BLOCK; /* optional "not" */ 4275 NEED1("missing source address"); 4276 if (add_src(cmd, *av, proto, cblen, tstate)) { 4277 av++; 4278 if (F_LEN(cmd) != 0) { /* ! any */ 4279 prev = cmd; 4280 cmd = next_cmd(cmd, &cblen); 4281 } 4282 } else 4283 errx(EX_USAGE, "bad source address %s", *av); 4284 OR_BLOCK(source_ip); 4285 4286 /* 4287 * source ports, optional 4288 */ 4289 NOT_BLOCK; /* optional "not" */ 4290 if ( av[0] != NULL ) { 4291 if (_substrcmp(*av, "any") == 0 || 4292 add_ports(cmd, *av, proto, O_IP_SRCPORT, cblen)) { 4293 av++; 4294 if (F_LEN(cmd) != 0) 4295 cmd = next_cmd(cmd, &cblen); 4296 } 4297 } 4298 4299 /* 4300 * "to", mandatory 4301 */ 4302 if ( (av[0] == NULL) || _substrcmp(*av, "to") != 0 ) 4303 errx(EX_USAGE, "missing ``to''"); 4304 av++; 4305 4306 /* 4307 * destination, mandatory 4308 */ 4309 OR_START(dest_ip); 4310 NOT_BLOCK; /* optional "not" */ 4311 NEED1("missing dst address"); 4312 if (add_dst(cmd, *av, proto, cblen, tstate)) { 4313 av++; 4314 if (F_LEN(cmd) != 0) { /* ! any */ 4315 prev = cmd; 4316 cmd = next_cmd(cmd, &cblen); 4317 } 4318 } else 4319 errx( EX_USAGE, "bad destination address %s", *av); 4320 OR_BLOCK(dest_ip); 4321 4322 /* 4323 * dest. ports, optional 4324 */ 4325 NOT_BLOCK; /* optional "not" */ 4326 if (av[0]) { 4327 if (_substrcmp(*av, "any") == 0 || 4328 add_ports(cmd, *av, proto, O_IP_DSTPORT, cblen)) { 4329 av++; 4330 if (F_LEN(cmd) != 0) 4331 cmd = next_cmd(cmd, &cblen); 4332 } 4333 } 4334 4335read_options: 4336 if (av[0] && first_cmd == cmd) { 4337 /* 4338 * nothing specified so far, store in the rule to ease 4339 * printout later. 4340 */ 4341 rule->flags |= IPFW_RULE_NOOPT; 4342 } 4343 prev = NULL; 4344 while ( av[0] != NULL ) { 4345 char *s; 4346 ipfw_insn_u32 *cmd32; /* alias for cmd */ 4347 4348 s = *av; 4349 cmd32 = (ipfw_insn_u32 *)cmd; 4350 4351 if (*s == '!') { /* alternate syntax for NOT */ 4352 if (cmd->len & F_NOT) 4353 errx(EX_USAGE, "double \"not\" not allowed\n"); 4354 cmd->len = F_NOT; 4355 s++; 4356 } 4357 i = match_token(rule_options, s); 4358 av++; 4359 switch(i) { 4360 case TOK_NOT: 4361 if (cmd->len & F_NOT) 4362 errx(EX_USAGE, "double \"not\" not allowed\n"); 4363 cmd->len = F_NOT; 4364 break; 4365 4366 case TOK_OR: 4367 if (open_par == 0 || prev == NULL) 4368 errx(EX_USAGE, "invalid \"or\" block\n"); 4369 prev->len |= F_OR; 4370 break; 4371 4372 case TOK_STARTBRACE: 4373 if (open_par) 4374 errx(EX_USAGE, "+nested \"(\" not allowed\n"); 4375 open_par = 1; 4376 break; 4377 4378 case TOK_ENDBRACE: 4379 if (!open_par) 4380 errx(EX_USAGE, "+missing \")\"\n"); 4381 open_par = 0; 4382 prev = NULL; 4383 break; 4384 4385 case TOK_IN: 4386 fill_cmd(cmd, O_IN, 0, 0); 4387 break; 4388 4389 case TOK_OUT: 4390 cmd->len ^= F_NOT; /* toggle F_NOT */ 4391 fill_cmd(cmd, O_IN, 0, 0); 4392 break; 4393 4394 case TOK_DIVERTED: 4395 fill_cmd(cmd, O_DIVERTED, 0, 3); 4396 break; 4397 4398 case TOK_DIVERTEDLOOPBACK: 4399 fill_cmd(cmd, O_DIVERTED, 0, 1); 4400 break; 4401 4402 case TOK_DIVERTEDOUTPUT: 4403 fill_cmd(cmd, O_DIVERTED, 0, 2); 4404 break; 4405 4406 case TOK_FRAG: 4407 fill_cmd(cmd, O_FRAG, 0, 0); 4408 break; 4409 4410 case TOK_LAYER2: 4411 fill_cmd(cmd, O_LAYER2, 0, 0); 4412 break; 4413 4414 case TOK_XMIT: 4415 case TOK_RECV: 4416 case TOK_VIA: 4417 NEED1("recv, xmit, via require interface name" 4418 " or address"); 4419 fill_iface((ipfw_insn_if *)cmd, av[0], cblen, tstate); 4420 av++; 4421 if (F_LEN(cmd) == 0) /* not a valid address */ 4422 break; 4423 if (i == TOK_XMIT) 4424 cmd->opcode = O_XMIT; 4425 else if (i == TOK_RECV) 4426 cmd->opcode = O_RECV; 4427 else if (i == TOK_VIA) 4428 cmd->opcode = O_VIA; 4429 break; 4430 4431 case TOK_ICMPTYPES: 4432 NEED1("icmptypes requires list of types"); 4433 fill_icmptypes((ipfw_insn_u32 *)cmd, *av); 4434 av++; 4435 break; 4436 4437 case TOK_ICMP6TYPES: 4438 NEED1("icmptypes requires list of types"); 4439 fill_icmp6types((ipfw_insn_icmp6 *)cmd, *av, cblen); 4440 av++; 4441 break; 4442 4443 case TOK_IPTTL: 4444 NEED1("ipttl requires TTL"); 4445 if (strpbrk(*av, "-,")) { 4446 if (!add_ports(cmd, *av, 0, O_IPTTL, cblen)) 4447 errx(EX_DATAERR, "invalid ipttl %s", *av); 4448 } else 4449 fill_cmd(cmd, O_IPTTL, 0, strtoul(*av, NULL, 0)); 4450 av++; 4451 break; 4452 4453 case TOK_IPID: 4454 NEED1("ipid requires id"); 4455 if (strpbrk(*av, "-,")) { 4456 if (!add_ports(cmd, *av, 0, O_IPID, cblen)) 4457 errx(EX_DATAERR, "invalid ipid %s", *av); 4458 } else 4459 fill_cmd(cmd, O_IPID, 0, strtoul(*av, NULL, 0)); 4460 av++; 4461 break; 4462 4463 case TOK_IPLEN: 4464 NEED1("iplen requires length"); 4465 if (strpbrk(*av, "-,")) { 4466 if (!add_ports(cmd, *av, 0, O_IPLEN, cblen)) 4467 errx(EX_DATAERR, "invalid ip len %s", *av); 4468 } else 4469 fill_cmd(cmd, O_IPLEN, 0, strtoul(*av, NULL, 0)); 4470 av++; 4471 break; 4472 4473 case TOK_IPVER: 4474 NEED1("ipver requires version"); 4475 fill_cmd(cmd, O_IPVER, 0, strtoul(*av, NULL, 0)); 4476 av++; 4477 break; 4478 4479 case TOK_IPPRECEDENCE: 4480 NEED1("ipprecedence requires value"); 4481 fill_cmd(cmd, O_IPPRECEDENCE, 0, 4482 (strtoul(*av, NULL, 0) & 7) << 5); 4483 av++; 4484 break; 4485 4486 case TOK_DSCP: 4487 NEED1("missing DSCP code"); 4488 fill_dscp(cmd, *av, cblen); 4489 av++; 4490 break; 4491 4492 case TOK_IPOPTS: 4493 NEED1("missing argument for ipoptions"); 4494 fill_flags_cmd(cmd, O_IPOPT, f_ipopts, *av); 4495 av++; 4496 break; 4497 4498 case TOK_IPTOS: 4499 NEED1("missing argument for iptos"); 4500 fill_flags_cmd(cmd, O_IPTOS, f_iptos, *av); 4501 av++; 4502 break; 4503 4504 case TOK_UID: 4505 NEED1("uid requires argument"); 4506 { 4507 char *end; 4508 uid_t uid; 4509 struct passwd *pwd; 4510 4511 cmd->opcode = O_UID; 4512 uid = strtoul(*av, &end, 0); 4513 pwd = (*end == '\0') ? getpwuid(uid) : getpwnam(*av); 4514 if (pwd == NULL) 4515 errx(EX_DATAERR, "uid \"%s\" nonexistent", *av); 4516 cmd32->d[0] = pwd->pw_uid; 4517 cmd->len |= F_INSN_SIZE(ipfw_insn_u32); 4518 av++; 4519 } 4520 break; 4521 4522 case TOK_GID: 4523 NEED1("gid requires argument"); 4524 { 4525 char *end; 4526 gid_t gid; 4527 struct group *grp; 4528 4529 cmd->opcode = O_GID; 4530 gid = strtoul(*av, &end, 0); 4531 grp = (*end == '\0') ? getgrgid(gid) : getgrnam(*av); 4532 if (grp == NULL) 4533 errx(EX_DATAERR, "gid \"%s\" nonexistent", *av); 4534 cmd32->d[0] = grp->gr_gid; 4535 cmd->len |= F_INSN_SIZE(ipfw_insn_u32); 4536 av++; 4537 } 4538 break; 4539 4540 case TOK_JAIL: 4541 NEED1("jail requires argument"); 4542 { 4543 char *end; 4544 int jid; 4545 4546 cmd->opcode = O_JAIL; 4547 jid = (int)strtol(*av, &end, 0); 4548 if (jid < 0 || *end != '\0') 4549 errx(EX_DATAERR, "jail requires prison ID"); 4550 cmd32->d[0] = (uint32_t)jid; 4551 cmd->len |= F_INSN_SIZE(ipfw_insn_u32); 4552 av++; 4553 } 4554 break; 4555 4556 case TOK_ESTAB: 4557 fill_cmd(cmd, O_ESTAB, 0, 0); 4558 break; 4559 4560 case TOK_SETUP: 4561 fill_cmd(cmd, O_TCPFLAGS, 0, 4562 (TH_SYN) | ( (TH_ACK) & 0xff) <<8 ); 4563 break; 4564 4565 case TOK_TCPDATALEN: 4566 NEED1("tcpdatalen requires length"); 4567 if (strpbrk(*av, "-,")) { 4568 if (!add_ports(cmd, *av, 0, O_TCPDATALEN, cblen)) 4569 errx(EX_DATAERR, "invalid tcpdata len %s", *av); 4570 } else 4571 fill_cmd(cmd, O_TCPDATALEN, 0, 4572 strtoul(*av, NULL, 0)); 4573 av++; 4574 break; 4575 4576 case TOK_TCPOPTS: 4577 NEED1("missing argument for tcpoptions"); 4578 fill_flags_cmd(cmd, O_TCPOPTS, f_tcpopts, *av); 4579 av++; 4580 break; 4581 4582 case TOK_TCPSEQ: 4583 case TOK_TCPACK: 4584 NEED1("tcpseq/tcpack requires argument"); 4585 cmd->len = F_INSN_SIZE(ipfw_insn_u32); 4586 cmd->opcode = (i == TOK_TCPSEQ) ? O_TCPSEQ : O_TCPACK; 4587 cmd32->d[0] = htonl(strtoul(*av, NULL, 0)); 4588 av++; 4589 break; 4590 4591 case TOK_TCPWIN: 4592 NEED1("tcpwin requires length"); 4593 if (strpbrk(*av, "-,")) { 4594 if (!add_ports(cmd, *av, 0, O_TCPWIN, cblen)) 4595 errx(EX_DATAERR, "invalid tcpwin len %s", *av); 4596 } else 4597 fill_cmd(cmd, O_TCPWIN, 0, 4598 strtoul(*av, NULL, 0)); 4599 av++; 4600 break; 4601 4602 case TOK_TCPFLAGS: 4603 NEED1("missing argument for tcpflags"); 4604 cmd->opcode = O_TCPFLAGS; 4605 fill_flags_cmd(cmd, O_TCPFLAGS, f_tcpflags, *av); 4606 av++; 4607 break; 4608 4609 case TOK_KEEPSTATE: { 4610 uint16_t uidx; 4611 4612 if (open_par) 4613 errx(EX_USAGE, "keep-state cannot be part " 4614 "of an or block"); 4615 if (have_state) 4616 errx(EX_USAGE, "only one of keep-state " 4617 "and limit is allowed"); 4618 if (*av != NULL && *av[0] == ':') { 4619 if (state_check_name(*av + 1) != 0) 4620 errx(EX_DATAERR, 4621 "Invalid state name %s", *av); 4622 uidx = pack_object(tstate, *av + 1, 4623 IPFW_TLV_STATE_NAME); 4624 av++; 4625 } else 4626 uidx = pack_object(tstate, default_state_name, 4627 IPFW_TLV_STATE_NAME); 4628 have_state = cmd; 4629 fill_cmd(cmd, O_KEEP_STATE, 0, uidx); 4630 break; 4631 } 4632 4633 case TOK_LIMIT: { 4634 ipfw_insn_limit *c = (ipfw_insn_limit *)cmd; 4635 int val; 4636 4637 if (open_par) 4638 errx(EX_USAGE, 4639 "limit cannot be part of an or block"); 4640 if (have_state) 4641 errx(EX_USAGE, "only one of keep-state and " 4642 "limit is allowed"); 4643 have_state = cmd; 4644 4645 cmd->len = F_INSN_SIZE(ipfw_insn_limit); 4646 CHECK_CMDLEN; 4647 cmd->opcode = O_LIMIT; 4648 c->limit_mask = c->conn_limit = 0; 4649 4650 while ( av[0] != NULL ) { 4651 if ((val = match_token(limit_masks, *av)) <= 0) 4652 break; 4653 c->limit_mask |= val; 4654 av++; 4655 } 4656 4657 if (c->limit_mask == 0) 4658 errx(EX_USAGE, "limit: missing limit mask"); 4659 4660 GET_UINT_ARG(c->conn_limit, IPFW_ARG_MIN, IPFW_ARG_MAX, 4661 TOK_LIMIT, rule_options); 4662 av++; 4663 4664 if (*av != NULL && *av[0] == ':') { 4665 if (state_check_name(*av + 1) != 0) 4666 errx(EX_DATAERR, 4667 "Invalid state name %s", *av); 4668 cmd->arg1 = pack_object(tstate, *av + 1, 4669 IPFW_TLV_STATE_NAME); 4670 av++; 4671 } else 4672 cmd->arg1 = pack_object(tstate, 4673 default_state_name, IPFW_TLV_STATE_NAME); 4674 break; 4675 } 4676 4677 case TOK_PROTO: 4678 NEED1("missing protocol"); 4679 if (add_proto(cmd, *av, &proto)) { 4680 av++; 4681 } else 4682 errx(EX_DATAERR, "invalid protocol ``%s''", 4683 *av); 4684 break; 4685 4686 case TOK_SRCIP: 4687 NEED1("missing source IP"); 4688 if (add_srcip(cmd, *av, cblen, tstate)) { 4689 av++; 4690 } 4691 break; 4692 4693 case TOK_DSTIP: 4694 NEED1("missing destination IP"); 4695 if (add_dstip(cmd, *av, cblen, tstate)) { 4696 av++; 4697 } 4698 break; 4699 4700 case TOK_SRCIP6: 4701 NEED1("missing source IP6"); 4702 if (add_srcip6(cmd, *av, cblen, tstate)) { 4703 av++; 4704 } 4705 break; 4706 4707 case TOK_DSTIP6: 4708 NEED1("missing destination IP6"); 4709 if (add_dstip6(cmd, *av, cblen, tstate)) { 4710 av++; 4711 } 4712 break; 4713 4714 case TOK_SRCPORT: 4715 NEED1("missing source port"); 4716 if (_substrcmp(*av, "any") == 0 || 4717 add_ports(cmd, *av, proto, O_IP_SRCPORT, cblen)) { 4718 av++; 4719 } else 4720 errx(EX_DATAERR, "invalid source port %s", *av); 4721 break; 4722 4723 case TOK_DSTPORT: 4724 NEED1("missing destination port"); 4725 if (_substrcmp(*av, "any") == 0 || 4726 add_ports(cmd, *av, proto, O_IP_DSTPORT, cblen)) { 4727 av++; 4728 } else 4729 errx(EX_DATAERR, "invalid destination port %s", 4730 *av); 4731 break; 4732 4733 case TOK_MAC: 4734 if (add_mac(cmd, av, cblen)) 4735 av += 2; 4736 break; 4737 4738 case TOK_MACTYPE: 4739 NEED1("missing mac type"); 4740 if (!add_mactype(cmd, *av, cblen)) 4741 errx(EX_DATAERR, "invalid mac type %s", *av); 4742 av++; 4743 break; 4744 4745 case TOK_VERREVPATH: 4746 fill_cmd(cmd, O_VERREVPATH, 0, 0); 4747 break; 4748 4749 case TOK_VERSRCREACH: 4750 fill_cmd(cmd, O_VERSRCREACH, 0, 0); 4751 break; 4752 4753 case TOK_ANTISPOOF: 4754 fill_cmd(cmd, O_ANTISPOOF, 0, 0); 4755 break; 4756 4757 case TOK_IPSEC: 4758 fill_cmd(cmd, O_IPSEC, 0, 0); 4759 break; 4760 4761 case TOK_IPV6: 4762 fill_cmd(cmd, O_IP6, 0, 0); 4763 break; 4764 4765 case TOK_IPV4: 4766 fill_cmd(cmd, O_IP4, 0, 0); 4767 break; 4768 4769 case TOK_EXT6HDR: 4770 fill_ext6hdr( cmd, *av ); 4771 av++; 4772 break; 4773 4774 case TOK_FLOWID: 4775 if (proto != IPPROTO_IPV6 ) 4776 errx( EX_USAGE, "flow-id filter is active " 4777 "only for ipv6 protocol\n"); 4778 fill_flow6( (ipfw_insn_u32 *) cmd, *av, cblen); 4779 av++; 4780 break; 4781 4782 case TOK_COMMENT: 4783 fill_comment(cmd, av, cblen); 4784 av[0]=NULL; 4785 break; 4786 4787 case TOK_TAGGED: 4788 if (av[0] && strpbrk(*av, "-,")) { 4789 if (!add_ports(cmd, *av, 0, O_TAGGED, cblen)) 4790 errx(EX_DATAERR, "tagged: invalid tag" 4791 " list: %s", *av); 4792 } 4793 else { 4794 uint16_t tag; 4795 4796 GET_UINT_ARG(tag, IPFW_ARG_MIN, IPFW_ARG_MAX, 4797 TOK_TAGGED, rule_options); 4798 fill_cmd(cmd, O_TAGGED, 0, tag); 4799 } 4800 av++; 4801 break; 4802 4803 case TOK_FIB: 4804 NEED1("fib requires fib number"); 4805 fill_cmd(cmd, O_FIB, 0, strtoul(*av, NULL, 0)); 4806 av++; 4807 break; 4808 case TOK_SOCKARG: 4809 fill_cmd(cmd, O_SOCKARG, 0, 0); 4810 break; 4811 4812 case TOK_LOOKUP: { 4813 ipfw_insn_u32 *c = (ipfw_insn_u32 *)cmd; 4814 int j; 4815 4816 if (!av[0] || !av[1]) 4817 errx(EX_USAGE, "format: lookup argument tablenum"); 4818 cmd->opcode = O_IP_DST_LOOKUP; 4819 cmd->len |= F_INSN_SIZE(ipfw_insn) + 2; 4820 i = match_token(rule_options, *av); 4821 for (j = 0; lookup_key[j] >= 0 ; j++) { 4822 if (i == lookup_key[j]) 4823 break; 4824 } 4825 if (lookup_key[j] <= 0) 4826 errx(EX_USAGE, "format: cannot lookup on %s", *av); 4827 __PAST_END(c->d, 1) = j; // i converted to option 4828 av++; 4829 4830 if ((j = pack_table(tstate, *av)) == 0) 4831 errx(EX_DATAERR, "Invalid table name: %s", *av); 4832 4833 cmd->arg1 = j; 4834 av++; 4835 } 4836 break; 4837 case TOK_FLOW: 4838 NEED1("missing table name"); 4839 if (strncmp(*av, "table(", 6) != 0) 4840 errx(EX_DATAERR, 4841 "enclose table name into \"table()\""); 4842 fill_table(cmd, *av, O_IP_FLOW_LOOKUP, tstate); 4843 av++; 4844 break; 4845 4846 default: 4847 errx(EX_USAGE, "unrecognised option [%d] %s\n", i, s); 4848 } 4849 if (F_LEN(cmd) > 0) { /* prepare to advance */ 4850 prev = cmd; 4851 cmd = next_cmd(cmd, &cblen); 4852 } 4853 } 4854 4855done: 4856 /* 4857 * Now copy stuff into the rule. 4858 * If we have a keep-state option, the first instruction 4859 * must be a PROBE_STATE (which is generated here). 4860 * If we have a LOG option, it was stored as the first command, 4861 * and now must be moved to the top of the action part. 4862 */ 4863 dst = (ipfw_insn *)rule->cmd; 4864 4865 /* 4866 * First thing to write into the command stream is the match probability. 4867 */ 4868 if (match_prob != 1) { /* 1 means always match */ 4869 dst->opcode = O_PROB; 4870 dst->len = 2; 4871 *((int32_t *)(dst+1)) = (int32_t)(match_prob * 0x7fffffff); 4872 dst += dst->len; 4873 } 4874 4875 /* 4876 * generate O_PROBE_STATE if necessary 4877 */ 4878 if (have_state && have_state->opcode != O_CHECK_STATE) { 4879 fill_cmd(dst, O_PROBE_STATE, 0, have_state->arg1); 4880 dst = next_cmd(dst, &rblen); 4881 } 4882 4883 /* copy all commands but O_LOG, O_KEEP_STATE, O_LIMIT, O_ALTQ, O_TAG */ 4884 for (src = (ipfw_insn *)cmdbuf; src != cmd; src += i) { 4885 i = F_LEN(src); 4886 CHECK_RBUFLEN(i); 4887 4888 switch (src->opcode) { 4889 case O_LOG: 4890 case O_KEEP_STATE: 4891 case O_LIMIT: 4892 case O_ALTQ: 4893 case O_TAG: 4894 break; 4895 default: 4896 bcopy(src, dst, i * sizeof(uint32_t)); 4897 dst += i; 4898 } 4899 } 4900 4901 /* 4902 * put back the have_state command as last opcode 4903 */ 4904 if (have_state && have_state->opcode != O_CHECK_STATE) { 4905 i = F_LEN(have_state); 4906 CHECK_RBUFLEN(i); 4907 bcopy(have_state, dst, i * sizeof(uint32_t)); 4908 dst += i; 4909 } 4910 /* 4911 * start action section 4912 */ 4913 rule->act_ofs = dst - rule->cmd; 4914 4915 /* put back O_LOG, O_ALTQ, O_TAG if necessary */ 4916 if (have_log) { 4917 i = F_LEN(have_log); 4918 CHECK_RBUFLEN(i); 4919 bcopy(have_log, dst, i * sizeof(uint32_t)); 4920 dst += i; 4921 } 4922 if (have_altq) { 4923 i = F_LEN(have_altq); 4924 CHECK_RBUFLEN(i); 4925 bcopy(have_altq, dst, i * sizeof(uint32_t)); 4926 dst += i; 4927 } 4928 if (have_tag) { 4929 i = F_LEN(have_tag); 4930 CHECK_RBUFLEN(i); 4931 bcopy(have_tag, dst, i * sizeof(uint32_t)); 4932 dst += i; 4933 } 4934 4935 /* 4936 * copy all other actions 4937 */ 4938 for (src = (ipfw_insn *)actbuf; src != action; src += i) { 4939 i = F_LEN(src); 4940 CHECK_RBUFLEN(i); 4941 bcopy(src, dst, i * sizeof(uint32_t)); 4942 dst += i; 4943 } 4944 4945 rule->cmd_len = (uint32_t *)dst - (uint32_t *)(rule->cmd); 4946 *rbufsize = (char *)dst - (char *)rule; 4947} 4948 4949static int 4950compare_ntlv(const void *_a, const void *_b) 4951{ 4952 ipfw_obj_ntlv *a, *b; 4953 4954 a = (ipfw_obj_ntlv *)_a; 4955 b = (ipfw_obj_ntlv *)_b; 4956 4957 if (a->set < b->set) 4958 return (-1); 4959 else if (a->set > b->set) 4960 return (1); 4961 4962 if (a->idx < b->idx) 4963 return (-1); 4964 else if (a->idx > b->idx) 4965 return (1); 4966 4967 if (a->head.type < b->head.type) 4968 return (-1); 4969 else if (a->head.type > b->head.type) 4970 return (1); 4971 4972 return (0); 4973} 4974 4975/* 4976 * Provide kernel with sorted list of referenced objects 4977 */ 4978static void 4979object_sort_ctlv(ipfw_obj_ctlv *ctlv) 4980{ 4981 4982 qsort(ctlv + 1, ctlv->count, ctlv->objsize, compare_ntlv); 4983} 4984 4985struct object_kt { 4986 uint16_t uidx; 4987 uint16_t type; 4988}; 4989static int 4990compare_object_kntlv(const void *k, const void *v) 4991{ 4992 ipfw_obj_ntlv *ntlv; 4993 struct object_kt key; 4994 4995 key = *((struct object_kt *)k); 4996 ntlv = (ipfw_obj_ntlv *)v; 4997 4998 if (key.uidx < ntlv->idx) 4999 return (-1); 5000 else if (key.uidx > ntlv->idx) 5001 return (1); 5002 5003 if (key.type < ntlv->head.type) 5004 return (-1); 5005 else if (key.type > ntlv->head.type) 5006 return (1); 5007 5008 return (0); 5009} 5010 5011/* 5012 * Finds object name in @ctlv by @idx and @type. 5013 * Uses the following facts: 5014 * 1) All TLVs are the same size 5015 * 2) Kernel implementation provides already sorted list. 5016 * 5017 * Returns table name or NULL. 5018 */ 5019static char * 5020object_search_ctlv(ipfw_obj_ctlv *ctlv, uint16_t idx, uint16_t type) 5021{ 5022 ipfw_obj_ntlv *ntlv; 5023 struct object_kt key; 5024 5025 key.uidx = idx; 5026 key.type = type; 5027 5028 ntlv = bsearch(&key, (ctlv + 1), ctlv->count, ctlv->objsize, 5029 compare_object_kntlv); 5030 5031 if (ntlv != NULL) 5032 return (ntlv->name); 5033 5034 return (NULL); 5035} 5036 5037static char * 5038table_search_ctlv(ipfw_obj_ctlv *ctlv, uint16_t idx) 5039{ 5040 5041 return (object_search_ctlv(ctlv, idx, IPFW_TLV_TBL_NAME)); 5042} 5043 5044/* 5045 * Adds one or more rules to ipfw chain. 5046 * Data layout: 5047 * Request: 5048 * [ 5049 * ip_fw3_opheader 5050 * [ ipfw_obj_ctlv(IPFW_TLV_TBL_LIST) ipfw_obj_ntlv x N ] (optional *1) 5051 * [ ipfw_obj_ctlv(IPFW_TLV_RULE_LIST) [ ip_fw_rule ip_fw_insn ] x N ] (*2) (*3) 5052 * ] 5053 * Reply: 5054 * [ 5055 * ip_fw3_opheader 5056 * [ ipfw_obj_ctlv(IPFW_TLV_TBL_LIST) ipfw_obj_ntlv x N ] (optional) 5057 * [ ipfw_obj_ctlv(IPFW_TLV_RULE_LIST) [ ip_fw_rule ip_fw_insn ] x N ] 5058 * ] 5059 * 5060 * Rules in reply are modified to store their actual ruleset number. 5061 * 5062 * (*1) TLVs inside IPFW_TLV_TBL_LIST needs to be sorted ascending 5063 * according to their idx field and there has to be no duplicates. 5064 * (*2) Numbered rules inside IPFW_TLV_RULE_LIST needs to be sorted ascending. 5065 * (*3) Each ip_fw structure needs to be aligned to u64 boundary. 5066 */ 5067void 5068ipfw_add(char *av[]) 5069{ 5070 uint32_t rulebuf[1024]; 5071 int rbufsize, default_off, tlen, rlen; 5072 size_t sz; 5073 struct tidx ts; 5074 struct ip_fw_rule *rule; 5075 caddr_t tbuf; 5076 ip_fw3_opheader *op3; 5077 ipfw_obj_ctlv *ctlv, *tstate; 5078 5079 rbufsize = sizeof(rulebuf); 5080 memset(rulebuf, 0, rbufsize); 5081 memset(&ts, 0, sizeof(ts)); 5082 5083 /* Optimize case with no tables */ 5084 default_off = sizeof(ipfw_obj_ctlv) + sizeof(ip_fw3_opheader); 5085 op3 = (ip_fw3_opheader *)rulebuf; 5086 ctlv = (ipfw_obj_ctlv *)(op3 + 1); 5087 rule = (struct ip_fw_rule *)(ctlv + 1); 5088 rbufsize -= default_off; 5089 5090 compile_rule(av, (uint32_t *)rule, &rbufsize, &ts); 5091 /* Align rule size to u64 boundary */ 5092 rlen = roundup2(rbufsize, sizeof(uint64_t)); 5093 5094 tbuf = NULL; 5095 sz = 0; 5096 tstate = NULL; 5097 if (ts.count != 0) { 5098 /* Some tables. We have to alloc more data */ 5099 tlen = ts.count * sizeof(ipfw_obj_ntlv); 5100 sz = default_off + sizeof(ipfw_obj_ctlv) + tlen + rlen; 5101 5102 if ((tbuf = calloc(1, sz)) == NULL) 5103 err(EX_UNAVAILABLE, "malloc() failed for IP_FW_ADD"); 5104 op3 = (ip_fw3_opheader *)tbuf; 5105 /* Tables first */ 5106 ctlv = (ipfw_obj_ctlv *)(op3 + 1); 5107 ctlv->head.type = IPFW_TLV_TBLNAME_LIST; 5108 ctlv->head.length = sizeof(ipfw_obj_ctlv) + tlen; 5109 ctlv->count = ts.count; 5110 ctlv->objsize = sizeof(ipfw_obj_ntlv); 5111 memcpy(ctlv + 1, ts.idx, tlen); 5112 object_sort_ctlv(ctlv); 5113 tstate = ctlv; 5114 /* Rule next */ 5115 ctlv = (ipfw_obj_ctlv *)((caddr_t)ctlv + ctlv->head.length); 5116 ctlv->head.type = IPFW_TLV_RULE_LIST; 5117 ctlv->head.length = sizeof(ipfw_obj_ctlv) + rlen; 5118 ctlv->count = 1; 5119 memcpy(ctlv + 1, rule, rbufsize); 5120 } else { 5121 /* Simply add header */ 5122 sz = rlen + default_off; 5123 memset(ctlv, 0, sizeof(*ctlv)); 5124 ctlv->head.type = IPFW_TLV_RULE_LIST; 5125 ctlv->head.length = sizeof(ipfw_obj_ctlv) + rlen; 5126 ctlv->count = 1; 5127 } 5128 5129 if (do_get3(IP_FW_XADD, op3, &sz) != 0) 5130 err(EX_UNAVAILABLE, "getsockopt(%s)", "IP_FW_XADD"); 5131 5132 if (!co.do_quiet) { 5133 struct format_opts sfo; 5134 struct buf_pr bp; 5135 memset(&sfo, 0, sizeof(sfo)); 5136 sfo.tstate = tstate; 5137 sfo.set_mask = (uint32_t)(-1); 5138 bp_alloc(&bp, 4096); 5139 show_static_rule(&co, &sfo, &bp, rule, NULL); 5140 printf("%s", bp.buf); 5141 bp_free(&bp); 5142 } 5143 5144 if (tbuf != NULL) 5145 free(tbuf); 5146 5147 if (ts.idx != NULL) 5148 free(ts.idx); 5149} 5150 5151/* 5152 * clear the counters or the log counters. 5153 * optname has the following values: 5154 * 0 (zero both counters and logging) 5155 * 1 (zero logging only) 5156 */ 5157void 5158ipfw_zero(int ac, char *av[], int optname) 5159{ 5160 ipfw_range_tlv rt; 5161 char const *errstr; 5162 char const *name = optname ? "RESETLOG" : "ZERO"; 5163 uint32_t arg; 5164 int failed = EX_OK; 5165 5166 optname = optname ? IP_FW_XRESETLOG : IP_FW_XZERO; 5167 av++; ac--; 5168 5169 if (ac == 0) { 5170 /* clear all entries */ 5171 memset(&rt, 0, sizeof(rt)); 5172 rt.flags = IPFW_RCFLAG_ALL; 5173 if (do_range_cmd(optname, &rt) < 0) 5174 err(EX_UNAVAILABLE, "setsockopt(IP_FW_X%s)", name); 5175 if (!co.do_quiet) 5176 printf("%s.\n", optname == IP_FW_XZERO ? 5177 "Accounting cleared":"Logging counts reset"); 5178 5179 return; 5180 } 5181 5182 while (ac) { 5183 /* Rule number */ 5184 if (isdigit(**av)) { 5185 arg = strtonum(*av, 0, 0xffff, &errstr); 5186 if (errstr) 5187 errx(EX_DATAERR, 5188 "invalid rule number %s\n", *av); 5189 memset(&rt, 0, sizeof(rt)); 5190 rt.start_rule = arg; 5191 rt.end_rule = arg; 5192 rt.flags |= IPFW_RCFLAG_RANGE; 5193 if (co.use_set != 0) { 5194 rt.set = co.use_set - 1; 5195 rt.flags |= IPFW_RCFLAG_SET; 5196 } 5197 if (do_range_cmd(optname, &rt) != 0) { 5198 warn("rule %u: setsockopt(IP_FW_X%s)", 5199 arg, name); 5200 failed = EX_UNAVAILABLE; 5201 } else if (rt.new_set == 0) { 5202 printf("Entry %d not found\n", arg); 5203 failed = EX_UNAVAILABLE; 5204 } else if (!co.do_quiet) 5205 printf("Entry %d %s.\n", arg, 5206 optname == IP_FW_XZERO ? 5207 "cleared" : "logging count reset"); 5208 } else { 5209 errx(EX_USAGE, "invalid rule number ``%s''", *av); 5210 } 5211 av++; ac--; 5212 } 5213 if (failed != EX_OK) 5214 exit(failed); 5215} 5216 5217void 5218ipfw_flush(int force) 5219{ 5220 ipfw_range_tlv rt; 5221 5222 if (!force && !co.do_quiet) { /* need to ask user */ 5223 int c; 5224 5225 printf("Are you sure? [yn] "); 5226 fflush(stdout); 5227 do { 5228 c = toupper(getc(stdin)); 5229 while (c != '\n' && getc(stdin) != '\n') 5230 if (feof(stdin)) 5231 return; /* and do not flush */ 5232 } while (c != 'Y' && c != 'N'); 5233 printf("\n"); 5234 if (c == 'N') /* user said no */ 5235 return; 5236 } 5237 if (co.do_pipe) { 5238 dummynet_flush(); 5239 return; 5240 } 5241 /* `ipfw set N flush` - is the same that `ipfw delete set N` */ 5242 memset(&rt, 0, sizeof(rt)); 5243 if (co.use_set != 0) { 5244 rt.set = co.use_set - 1; 5245 rt.flags = IPFW_RCFLAG_SET; 5246 } else 5247 rt.flags = IPFW_RCFLAG_ALL; 5248 if (do_range_cmd(IP_FW_XDEL, &rt) != 0) 5249 err(EX_UNAVAILABLE, "setsockopt(IP_FW_XDEL)"); 5250 if (!co.do_quiet) 5251 printf("Flushed all %s.\n", co.do_pipe ? "pipes" : "rules"); 5252} 5253 5254static struct _s_x intcmds[] = { 5255 { "talist", TOK_TALIST }, 5256 { "iflist", TOK_IFLIST }, 5257 { "olist", TOK_OLIST }, 5258 { "vlist", TOK_VLIST }, 5259 { NULL, 0 } 5260}; 5261 5262static struct _s_x otypes[] = { 5263 { "EACTION", IPFW_TLV_EACTION }, 5264 { "DYNSTATE", IPFW_TLV_STATE_NAME }, 5265 { NULL, 0 } 5266}; 5267 5268static const char* 5269lookup_eaction_name(ipfw_obj_ntlv *ntlv, int cnt, uint16_t type) 5270{ 5271 const char *name; 5272 int i; 5273 5274 name = NULL; 5275 for (i = 0; i < cnt; i++) { 5276 if (ntlv[i].head.type != IPFW_TLV_EACTION) 5277 continue; 5278 if (IPFW_TLV_EACTION_NAME(ntlv[i].idx) != type) 5279 continue; 5280 name = ntlv[i].name; 5281 break; 5282 } 5283 return (name); 5284} 5285 5286static void 5287ipfw_list_objects(int ac, char *av[]) 5288{ 5289 ipfw_obj_lheader req, *olh; 5290 ipfw_obj_ntlv *ntlv; 5291 const char *name; 5292 size_t sz; 5293 int i; 5294 5295 memset(&req, 0, sizeof(req)); 5296 sz = sizeof(req); 5297 if (do_get3(IP_FW_DUMP_SRVOBJECTS, &req.opheader, &sz) != 0) 5298 if (errno != ENOMEM) 5299 return; 5300 5301 sz = req.size; 5302 if ((olh = calloc(1, sz)) == NULL) 5303 return; 5304 5305 olh->size = sz; 5306 if (do_get3(IP_FW_DUMP_SRVOBJECTS, &olh->opheader, &sz) != 0) { 5307 free(olh); 5308 return; 5309 } 5310 5311 if (olh->count > 0) 5312 printf("Objects list:\n"); 5313 else 5314 printf("There are no objects\n"); 5315 ntlv = (ipfw_obj_ntlv *)(olh + 1); 5316 for (i = 0; i < olh->count; i++) { 5317 name = match_value(otypes, ntlv->head.type); 5318 if (name == NULL) 5319 name = lookup_eaction_name( 5320 (ipfw_obj_ntlv *)(olh + 1), olh->count, 5321 ntlv->head.type); 5322 if (name == NULL) 5323 printf(" kidx: %4d\ttype: %10d\tname: %s\n", 5324 ntlv->idx, ntlv->head.type, ntlv->name); 5325 else 5326 printf(" kidx: %4d\ttype: %10s\tname: %s\n", 5327 ntlv->idx, name, ntlv->name); 5328 ntlv++; 5329 } 5330 free(olh); 5331} 5332 5333void 5334ipfw_internal_handler(int ac, char *av[]) 5335{ 5336 int tcmd; 5337 5338 ac--; av++; 5339 NEED1("internal cmd required"); 5340 5341 if ((tcmd = match_token(intcmds, *av)) == -1) 5342 errx(EX_USAGE, "invalid internal sub-cmd: %s", *av); 5343 5344 switch (tcmd) { 5345 case TOK_IFLIST: 5346 ipfw_list_tifaces(); 5347 break; 5348 case TOK_TALIST: 5349 ipfw_list_ta(ac, av); 5350 break; 5351 case TOK_OLIST: 5352 ipfw_list_objects(ac, av); 5353 break; 5354 case TOK_VLIST: 5355 ipfw_list_values(ac, av); 5356 break; 5357 } 5358} 5359 5360static int 5361ipfw_get_tracked_ifaces(ipfw_obj_lheader **polh) 5362{ 5363 ipfw_obj_lheader req, *olh; 5364 size_t sz; 5365 5366 memset(&req, 0, sizeof(req)); 5367 sz = sizeof(req); 5368 5369 if (do_get3(IP_FW_XIFLIST, &req.opheader, &sz) != 0) { 5370 if (errno != ENOMEM) 5371 return (errno); 5372 } 5373 5374 sz = req.size; 5375 if ((olh = calloc(1, sz)) == NULL) 5376 return (ENOMEM); 5377 5378 olh->size = sz; 5379 if (do_get3(IP_FW_XIFLIST, &olh->opheader, &sz) != 0) { 5380 free(olh); 5381 return (errno); 5382 } 5383 5384 *polh = olh; 5385 return (0); 5386} 5387 5388static int 5389ifinfo_cmp(const void *a, const void *b) 5390{ 5391 ipfw_iface_info *ia, *ib; 5392 5393 ia = (ipfw_iface_info *)a; 5394 ib = (ipfw_iface_info *)b; 5395 5396 return (stringnum_cmp(ia->ifname, ib->ifname)); 5397} 5398 5399/* 5400 * Retrieves table list from kernel, 5401 * optionally sorts it and calls requested function for each table. 5402 * Returns 0 on success. 5403 */ 5404static void 5405ipfw_list_tifaces() 5406{ 5407 ipfw_obj_lheader *olh; 5408 ipfw_iface_info *info; 5409 int i, error; 5410 5411 if ((error = ipfw_get_tracked_ifaces(&olh)) != 0) 5412 err(EX_OSERR, "Unable to request ipfw tracked interface list"); 5413 5414 5415 qsort(olh + 1, olh->count, olh->objsize, ifinfo_cmp); 5416 5417 info = (ipfw_iface_info *)(olh + 1); 5418 for (i = 0; i < olh->count; i++) { 5419 if (info->flags & IPFW_IFFLAG_RESOLVED) 5420 printf("%s ifindex: %d refcount: %u changes: %u\n", 5421 info->ifname, info->ifindex, info->refcnt, 5422 info->gencnt); 5423 else 5424 printf("%s ifindex: unresolved refcount: %u changes: %u\n", 5425 info->ifname, info->refcnt, info->gencnt); 5426 info = (ipfw_iface_info *)((caddr_t)info + olh->objsize); 5427 } 5428 5429 free(olh); 5430} 5431 5432 5433 5434 5435