sbin/ipfw/ipfw2.c

   1 /*
   2  * Copyright (c) 2002-2003 Luigi Rizzo
   3  * Copyright (c) 1996 Alex Nash, Paul Traina, Poul-Henning Kamp
   4  * Copyright (c) 1994 Ugen J.S.Antsilevich
   5  *
   6  * Idea and grammar partially left from:
   7  * Copyright (c) 1993 Daniel Boulet
   8  *
   9  * Redistribution and use in source forms, with and without modification,
  10  * are permitted provided that this entire comment appears intact.
  11  *
  12  * Redistribution in binary form may occur without any restrictions.
  13  * Obviously, it would be nice if you gave credit where credit is due
  14  * but requiring it would be too onerous.
  15  *
  16  * This software is provided ``AS IS'' without any warranties of any kind.
  17  *
  18  * NEW command line interface for IP firewall facility
  19  *
  20  * $FreeBSD$
  21  */
  22
  23 #include <sys/types.h>
  24 #include <sys/param.h>
  25 #include <sys/socket.h>
  26 #include <sys/sockio.h>
  27 #include <sys/sysctl.h>
  28
  29 #include "ipfw2.h"
  30
  31 #include <ctype.h>
  32 #include <err.h>
  33 #include <errno.h>
  34 #include <grp.h>
  35 #include <netdb.h>
  36 #include <pwd.h>
  37 #include <stdio.h>
  38 #include <stdarg.h>
  39 #include <stdlib.h>
  40 #include <string.h>
  41 #include <sysexits.h>
  42 #include <time.h>       /* ctime */
  43 #include <timeconv.h>   /* _long_to_time */
  44 #include <unistd.h>
  45 #include <fcntl.h>
  46 #include <stddef.h>     /* offsetof */
  47
  48 #include <net/ethernet.h>
  49 #include <net/if.h>             /* only IFNAMSIZ */
  50 #include <netinet/in.h>
  51 #include <netinet/in_systm.h>   /* only n_short, n_long */
  52 #include <netinet/ip.h>
  53 #include <netinet/ip_icmp.h>
  54 #include <netinet/ip_fw.h>
  55 #include <netinet/tcp.h>
  56 #include <arpa/inet.h>
  57
  58 struct cmdline_opts co; /* global options */
  59
  60 struct format_opts {
  61         int bcwidth;
  62         int pcwidth;
  63         int show_counters;
  64         int show_time;          /* show timestamp */
  65         uint32_t set_mask;      /* enabled sets mask */
  66         uint32_t flags;         /* request flags */
  67         uint32_t first;         /* first rule to request */
  68         uint32_t last;          /* last rule to request */
  69         uint32_t dcnt;          /* number of dynamic states */
  70         ipfw_obj_ctlv *tstate;  /* table state data */
  71 };
  72
  73 int resvd_set_number = RESVD_SET;
  74
  75 int ipfw_socket = -1;
  76
  77 #define CHECK_LENGTH(v, len) do {                               \
  78         if ((v) < (len))                                        \
  79                 errx(EX_DATAERR, "Rule too long");              \
  80         } while (0)
  81 /*
  82  * Check if we have enough space in cmd buffer. Note that since
  83  * first 8? u32 words are reserved by reserved header, full cmd
  84  * buffer can't be used, so we need to protect from buffer overrun
  85  * only. At the beginning, cblen is less than actual buffer size by
  86  * size of ipfw_insn_u32 instruction + 1 u32 work. This eliminates need
  87  * for checking small instructions fitting in given range.
  88  * We also (ab)use the fact that ipfw_insn is always the first field
  89  * for any custom instruction.
  90  */
  91 #define CHECK_CMDLEN    CHECK_LENGTH(cblen, F_LEN((ipfw_insn *)cmd))
  92
  93 #define GET_UINT_ARG(arg, min, max, tok, s_x) do {                      \
  94         if (!av[0])                                                     \
  95                 errx(EX_USAGE, "%s: missing argument", match_value(s_x, tok)); \
  96         if (_substrcmp(*av, "tablearg") == 0) {                         \
  97                 arg = IP_FW_TARG;                                       \
  98                 break;                                                  \
  99         }                                                               \
 100                                                                         \
 101         {                                                               \
 102         long _xval;                                                     \
 103         char *end;                                                      \
 104                                                                         \
 105         _xval = strtol(*av, &end, 10);                                  \
 106                                                                         \
 107         if (!isdigit(**av) || *end != '\0' || (_xval == 0 && errno == EINVAL)) \
 108                 errx(EX_DATAERR, "%s: invalid argument: %s",            \
 109                     match_value(s_x, tok), *av);                        \
 110                                                                         \
 111         if (errno == ERANGE || _xval < min || _xval > max)              \
 112                 errx(EX_DATAERR, "%s: argument is out of range (%u..%u): %s", \
 113                     match_value(s_x, tok), min, max, *av);              \
 114                                                                         \
 115         if (_xval == IP_FW_TARG)                                        \
 116                 errx(EX_DATAERR, "%s: illegal argument value: %s",      \
 117                     match_value(s_x, tok), *av);                        \
 118         arg = _xval;                                                    \
 119         }                                                               \
 120 } while (0)
 121
 122 static struct _s_x f_tcpflags[] = {
 123         { "syn", TH_SYN },
 124         { "fin", TH_FIN },
 125         { "ack", TH_ACK },
 126         { "psh", TH_PUSH },
 127         { "rst", TH_RST },
 128         { "urg", TH_URG },
 129         { "tcp flag", 0 },
 130         { NULL, 0 }
 131 };
 132
 133 static struct _s_x f_tcpopts[] = {
 134         { "mss",        IP_FW_TCPOPT_MSS },
 135         { "maxseg",     IP_FW_TCPOPT_MSS },
 136         { "window",     IP_FW_TCPOPT_WINDOW },
 137         { "sack",       IP_FW_TCPOPT_SACK },
 138         { "ts",         IP_FW_TCPOPT_TS },
 139         { "timestamp",  IP_FW_TCPOPT_TS },
 140         { "cc",         IP_FW_TCPOPT_CC },
 141         { "tcp option", 0 },
 142         { NULL, 0 }
 143 };
 144
 145 /*
 146  * IP options span the range 0 to 255 so we need to remap them
 147  * (though in fact only the low 5 bits are significant).
 148  */
 149 static struct _s_x f_ipopts[] = {
 150         { "ssrr",       IP_FW_IPOPT_SSRR},
 151         { "lsrr",       IP_FW_IPOPT_LSRR},
 152         { "rr",         IP_FW_IPOPT_RR},
 153         { "ts",         IP_FW_IPOPT_TS},
 154         { "ip option",  0 },
 155         { NULL, 0 }
 156 };
 157
 158 static struct _s_x f_iptos[] = {
 159         { "lowdelay",   IPTOS_LOWDELAY},
 160         { "throughput", IPTOS_THROUGHPUT},
 161         { "reliability", IPTOS_RELIABILITY},
 162         { "mincost",    IPTOS_MINCOST},
 163         { "congestion", IPTOS_ECN_CE},
 164         { "ecntransport", IPTOS_ECN_ECT0},
 165         { "ip tos option", 0},
 166         { NULL, 0 }
 167 };
 168
 169 struct _s_x f_ipdscp[] = {
 170         { "af11", IPTOS_DSCP_AF11 >> 2 },       /* 001010 */
 171         { "af12", IPTOS_DSCP_AF12 >> 2 },       /* 001100 */
 172         { "af13", IPTOS_DSCP_AF13 >> 2 },       /* 001110 */
 173         { "af21", IPTOS_DSCP_AF21 >> 2 },       /* 010010 */
 174         { "af22", IPTOS_DSCP_AF22 >> 2 },       /* 010100 */
 175         { "af23", IPTOS_DSCP_AF23 >> 2 },       /* 010110 */
 176         { "af31", IPTOS_DSCP_AF31 >> 2 },       /* 011010 */
 177         { "af32", IPTOS_DSCP_AF32 >> 2 },       /* 011100 */
 178         { "af33", IPTOS_DSCP_AF33 >> 2 },       /* 011110 */
 179         { "af41", IPTOS_DSCP_AF41 >> 2 },       /* 100010 */
 180         { "af42", IPTOS_DSCP_AF42 >> 2 },       /* 100100 */
 181         { "af43", IPTOS_DSCP_AF43 >> 2 },       /* 100110 */
 182         { "be", IPTOS_DSCP_CS0 >> 2 },  /* 000000 */
 183         { "ef", IPTOS_DSCP_EF >> 2 },   /* 101110 */
 184         { "cs0", IPTOS_DSCP_CS0 >> 2 }, /* 000000 */
 185         { "cs1", IPTOS_DSCP_CS1 >> 2 }, /* 001000 */
 186         { "cs2", IPTOS_DSCP_CS2 >> 2 }, /* 010000 */
 187         { "cs3", IPTOS_DSCP_CS3 >> 2 }, /* 011000 */
 188         { "cs4", IPTOS_DSCP_CS4 >> 2 }, /* 100000 */
 189         { "cs5", IPTOS_DSCP_CS5 >> 2 }, /* 101000 */
 190         { "cs6", IPTOS_DSCP_CS6 >> 2 }, /* 110000 */
 191         { "cs7", IPTOS_DSCP_CS7 >> 2 }, /* 100000 */
 192         { NULL, 0 }
 193 };
 194
 195 static struct _s_x limit_masks[] = {
 196         {"all",         DYN_SRC_ADDR|DYN_SRC_PORT|DYN_DST_ADDR|DYN_DST_PORT},
 197         {"src-addr",    DYN_SRC_ADDR},
 198         {"src-port",    DYN_SRC_PORT},
 199         {"dst-addr",    DYN_DST_ADDR},
 200         {"dst-port",    DYN_DST_PORT},
 201         {NULL,          0}
 202 };
 203
 204 /*
 205  * we use IPPROTO_ETHERTYPE as a fake protocol id to call the print routines
 206  * This is only used in this code.
 207  */
 208 #define IPPROTO_ETHERTYPE       0x1000
 209 static struct _s_x ether_types[] = {
 210     /*
 211      * Note, we cannot use "-:&/" in the names because they are field
 212      * separators in the type specifications. Also, we use s = NULL as
 213      * end-delimiter, because a type of 0 can be legal.
 214      */
 215         { "ip",         0x0800 },
 216         { "ipv4",       0x0800 },
 217         { "ipv6",       0x86dd },
 218         { "arp",        0x0806 },
 219         { "rarp",       0x8035 },
 220         { "vlan",       0x8100 },
 221         { "loop",       0x9000 },
 222         { "trail",      0x1000 },
 223         { "at",         0x809b },
 224         { "atalk",      0x809b },
 225         { "aarp",       0x80f3 },
 226         { "pppoe_disc", 0x8863 },
 227         { "pppoe_sess", 0x8864 },
 228         { "ipx_8022",   0x00E0 },
 229         { "ipx_8023",   0x0000 },
 230         { "ipx_ii",     0x8137 },
 231         { "ipx_snap",   0x8137 },
 232         { "ipx",        0x8137 },
 233         { "ns",         0x0600 },
 234         { NULL,         0 }
 235 };
 236
 237 static struct _s_x rule_eactions[] = {
 238         { NULL, 0 }     /* terminator */
 239 };
 240
 241 static struct _s_x rule_actions[] = {
 242         { "accept",             TOK_ACCEPT },
 243         { "pass",               TOK_ACCEPT },
 244         { "allow",              TOK_ACCEPT },
 245         { "permit",             TOK_ACCEPT },
 246         { "count",              TOK_COUNT },
 247         { "pipe",               TOK_PIPE },
 248         { "queue",              TOK_QUEUE },
 249         { "divert",             TOK_DIVERT },
 250         { "tee",                TOK_TEE },
 251         { "netgraph",           TOK_NETGRAPH },
 252         { "ngtee",              TOK_NGTEE },
 253         { "fwd",                TOK_FORWARD },
 254         { "forward",            TOK_FORWARD },
 255         { "skipto",             TOK_SKIPTO },
 256         { "deny",               TOK_DENY },
 257         { "drop",               TOK_DENY },
 258         { "reject",             TOK_REJECT },
 259         { "reset6",             TOK_RESET6 },
 260         { "reset",              TOK_RESET },
 261         { "unreach6",           TOK_UNREACH6 },
 262         { "unreach",            TOK_UNREACH },
 263         { "check-state",        TOK_CHECKSTATE },
 264         { "//",                 TOK_COMMENT },
 265         { "nat",                TOK_NAT },
 266         { "reass",              TOK_REASS },
 267         { "setfib",             TOK_SETFIB },
 268         { "setdscp",            TOK_SETDSCP },
 269         { "call",               TOK_CALL },
 270         { "return",             TOK_RETURN },
 271         { "eaction",            TOK_EACTION },
 272         { NULL, 0 }     /* terminator */
 273 };
 274
 275 static struct _s_x rule_action_params[] = {
 276         { "altq",               TOK_ALTQ },
 277         { "log",                TOK_LOG },
 278         { "tag",                TOK_TAG },
 279         { "untag",              TOK_UNTAG },
 280         { NULL, 0 }     /* terminator */
 281 };
 282
 283 /*
 284  * The 'lookup' instruction accepts one of the following arguments.
 285  * -1 is a terminator for the list.
 286  * Arguments are passed as v[1] in O_DST_LOOKUP options.
 287  */
 288 static int lookup_key[] = {
 289         TOK_DSTIP, TOK_SRCIP, TOK_DSTPORT, TOK_SRCPORT,
 290         TOK_UID, TOK_JAIL, TOK_DSCP, -1 };
 291
 292 static struct _s_x rule_options[] = {
 293         { "tagged",             TOK_TAGGED },
 294         { "uid",                TOK_UID },
 295         { "gid",                TOK_GID },
 296         { "jail",               TOK_JAIL },
 297         { "in",                 TOK_IN },
 298         { "limit",              TOK_LIMIT },
 299         { "keep-state",         TOK_KEEPSTATE },
 300         { "bridged",            TOK_LAYER2 },
 301         { "layer2",             TOK_LAYER2 },
 302         { "out",                TOK_OUT },
 303         { "diverted",           TOK_DIVERTED },
 304         { "diverted-loopback",  TOK_DIVERTEDLOOPBACK },
 305         { "diverted-output",    TOK_DIVERTEDOUTPUT },
 306         { "xmit",               TOK_XMIT },
 307         { "recv",               TOK_RECV },
 308         { "via",                TOK_VIA },
 309         { "fragment",           TOK_FRAG },
 310         { "frag",               TOK_FRAG },
 311         { "fib",                TOK_FIB },
 312         { "ipoptions",          TOK_IPOPTS },
 313         { "ipopts",             TOK_IPOPTS },
 314         { "iplen",              TOK_IPLEN },
 315         { "ipid",               TOK_IPID },
 316         { "ipprecedence",       TOK_IPPRECEDENCE },
 317         { "dscp",               TOK_DSCP },
 318         { "iptos",              TOK_IPTOS },
 319         { "ipttl",              TOK_IPTTL },
 320         { "ipversion",          TOK_IPVER },
 321         { "ipver",              TOK_IPVER },
 322         { "estab",              TOK_ESTAB },
 323         { "established",        TOK_ESTAB },
 324         { "setup",              TOK_SETUP },
 325         { "sockarg",            TOK_SOCKARG },
 326         { "tcpdatalen",         TOK_TCPDATALEN },
 327         { "tcpflags",           TOK_TCPFLAGS },
 328         { "tcpflgs",            TOK_TCPFLAGS },
 329         { "tcpoptions",         TOK_TCPOPTS },
 330         { "tcpopts",            TOK_TCPOPTS },
 331         { "tcpseq",             TOK_TCPSEQ },
 332         { "tcpack",             TOK_TCPACK },
 333         { "tcpwin",             TOK_TCPWIN },
 334         { "icmptype",           TOK_ICMPTYPES },
 335         { "icmptypes",          TOK_ICMPTYPES },
 336         { "dst-ip",             TOK_DSTIP },
 337         { "src-ip",             TOK_SRCIP },
 338         { "dst-port",           TOK_DSTPORT },
 339         { "src-port",           TOK_SRCPORT },
 340         { "proto",              TOK_PROTO },
 341         { "MAC",                TOK_MAC },
 342         { "mac",                TOK_MAC },
 343         { "mac-type",           TOK_MACTYPE },
 344         { "verrevpath",         TOK_VERREVPATH },
 345         { "versrcreach",        TOK_VERSRCREACH },
 346         { "antispoof",          TOK_ANTISPOOF },
 347         { "ipsec",              TOK_IPSEC },
 348         { "icmp6type",          TOK_ICMP6TYPES },
 349         { "icmp6types",         TOK_ICMP6TYPES },
 350         { "ext6hdr",            TOK_EXT6HDR},
 351         { "flow-id",            TOK_FLOWID},
 352         { "ipv6",               TOK_IPV6},
 353         { "ip6",                TOK_IPV6},
 354         { "ipv4",               TOK_IPV4},
 355         { "ip4",                TOK_IPV4},
 356         { "dst-ipv6",           TOK_DSTIP6},
 357         { "dst-ip6",            TOK_DSTIP6},
 358         { "src-ipv6",           TOK_SRCIP6},
 359         { "src-ip6",            TOK_SRCIP6},
 360         { "lookup",             TOK_LOOKUP},
 361         { "flow",               TOK_FLOW},
 362         { "//",                 TOK_COMMENT },
 363
 364         { "not",                TOK_NOT },              /* pseudo option */
 365         { "!", /* escape ? */   TOK_NOT },              /* pseudo option */
 366         { "or",                 TOK_OR },               /* pseudo option */
 367         { "|", /* escape */     TOK_OR },               /* pseudo option */
 368         { "{",                  TOK_STARTBRACE },       /* pseudo option */
 369         { "(",                  TOK_STARTBRACE },       /* pseudo option */
 370         { "}",                  TOK_ENDBRACE },         /* pseudo option */
 371         { ")",                  TOK_ENDBRACE },         /* pseudo option */
 372         { NULL, 0 }     /* terminator */
 373 };
 374
 375 void bprint_uint_arg(struct buf_pr *bp, const char *str, uint32_t arg);
 376 static int ipfw_get_config(struct cmdline_opts *co, struct format_opts *fo,
 377     ipfw_cfg_lheader **pcfg, size_t *psize);
 378 static int ipfw_show_config(struct cmdline_opts *co, struct format_opts *fo,
 379     ipfw_cfg_lheader *cfg, size_t sz, int ac, char **av);
 380 static void ipfw_list_tifaces(void);
 381
 382 struct tidx;
 383 static uint16_t pack_object(struct tidx *tstate, char *name, int otype);
 384 static uint16_t pack_table(struct tidx *tstate, char *name);
 385
 386 static char *table_search_ctlv(ipfw_obj_ctlv *ctlv, uint16_t idx);
 387 static void object_sort_ctlv(ipfw_obj_ctlv *ctlv);
 388 static char *object_search_ctlv(ipfw_obj_ctlv *ctlv, uint16_t idx,
 389     uint16_t type);
 390
 391 /*
 392  * Simple string buffer API.
 393  * Used to simplify buffer passing between function and for
 394  * transparent overrun handling.
 395  */
 396
 397 /*
 398  * Allocates new buffer of given size @sz.
 399  *
 400  * Returns 0 on success.
 401  */
 402 int
 403 bp_alloc(struct buf_pr *b, size_t size)
 404 {
 405         memset(b, 0, sizeof(struct buf_pr));
 406
 407         if ((b->buf = calloc(1, size)) == NULL)
 408                 return (ENOMEM);
 409
 410         b->ptr = b->buf;
 411         b->size = size;
 412         b->avail = b->size;
 413
 414         return (0);
 415 }
 416
 417 void
 418 bp_free(struct buf_pr *b)
 419 {
 420
 421         free(b->buf);
 422 }
 423
 424 /*
 425  * Flushes buffer so new writer start from beginning.
 426  */
 427 void
 428 bp_flush(struct buf_pr *b)
 429 {
 430
 431         b->ptr = b->buf;
 432         b->avail = b->size;
 433         b->buf[0] = '\0';
 434 }
 435
 436 /*
 437  * Print message specified by @format and args.
 438  * Automatically manage buffer space and transparently handle
 439  * buffer overruns.
 440  *
 441  * Returns number of bytes that should have been printed.
 442  */
 443 int
 444 bprintf(struct buf_pr *b, char *format, ...)
 445 {
 446         va_list args;
 447         int i;
 448
 449         va_start(args, format);
 450
 451         i = vsnprintf(b->ptr, b->avail, format, args);
 452         va_end(args);
 453
 454         if (i > b->avail || i < 0) {
 455                 /* Overflow or print error */
 456                 b->avail = 0;
 457         } else {
 458                 b->ptr += i;
 459                 b->avail -= i;
 460         }
 461
 462         b->needed += i;
 463
 464         return (i);
 465 }
 466
 467 /*
 468  * Special values printer for tablearg-aware opcodes.
 469  */
 470 void
 471 bprint_uint_arg(struct buf_pr *bp, const char *str, uint32_t arg)
 472 {
 473
 474         if (str != NULL)
 475                 bprintf(bp, "%s", str);
 476         if (arg == IP_FW_TARG)
 477                 bprintf(bp, "tablearg");
 478         else
 479                 bprintf(bp, "%u", arg);
 480 }
 481
 482 /*
 483  * Helper routine to print a possibly unaligned uint64_t on
 484  * various platform. If width > 0, print the value with
 485  * the desired width, followed by a space;
 486  * otherwise, return the required width.
 487  */
 488 int
 489 pr_u64(struct buf_pr *b, uint64_t *pd, int width)
 490 {
 491 #ifdef TCC
 492 #define U64_FMT "I64"
 493 #else
 494 #define U64_FMT "llu"
 495 #endif
 496         uint64_t u;
 497         unsigned long long d;
 498
 499         bcopy (pd, &u, sizeof(u));
 500         d = u;
 501         return (width > 0) ?
 502                 bprintf(b, "%*" U64_FMT " ", width, d) :
 503                 snprintf(NULL, 0, "%" U64_FMT, d) ;
 504 #undef U64_FMT
 505 }
 506
 507
 508 void *
 509 safe_calloc(size_t number, size_t size)
 510 {
 511         void *ret = calloc(number, size);
 512
 513         if (ret == NULL)
 514                 err(EX_OSERR, "calloc");
 515         return ret;
 516 }
 517
 518 void *
 519 safe_realloc(void *ptr, size_t size)
 520 {
 521         void *ret = realloc(ptr, size);
 522
 523         if (ret == NULL)
 524                 err(EX_OSERR, "realloc");
 525         return ret;
 526 }
 527
 528 /*
 529  * Compare things like interface or table names.
 530  */
 531 int
 532 stringnum_cmp(const char *a, const char *b)
 533 {
 534         int la, lb;
 535
 536         la = strlen(a);
 537         lb = strlen(b);
 538
 539         if (la > lb)
 540                 return (1);
 541         else if (la < lb)
 542                 return (-01);
 543
 544         return (strcmp(a, b));
 545 }
 546
 547
 548 /*
 549  * conditionally runs the command.
 550  * Selected options or negative -> getsockopt
 551  */
 552 int
 553 do_cmd(int optname, void *optval, uintptr_t optlen)
 554 {
 555         int i;
 556
 557         if (co.test_only)
 558                 return 0;
 559
 560         if (ipfw_socket == -1)
 561                 ipfw_socket = socket(AF_INET, SOCK_RAW, IPPROTO_RAW);
 562         if (ipfw_socket < 0)
 563                 err(EX_UNAVAILABLE, "socket");
 564
 565         if (optname == IP_FW_GET || optname == IP_DUMMYNET_GET ||
 566             optname == IP_FW_ADD || optname == IP_FW3 ||
 567             optname == IP_FW_NAT_GET_CONFIG ||
 568             optname < 0 ||
 569             optname == IP_FW_NAT_GET_LOG) {
 570                 if (optname < 0)
 571                         optname = -optname;
 572                 i = getsockopt(ipfw_socket, IPPROTO_IP, optname, optval,
 573                         (socklen_t *)optlen);
 574         } else {
 575                 i = setsockopt(ipfw_socket, IPPROTO_IP, optname, optval, optlen);
 576         }
 577         return i;
 578 }
 579
 580 /*
 581  * do_set3 - pass ipfw control cmd to kernel
 582  * @optname: option name
 583  * @optval: pointer to option data
 584  * @optlen: option length
 585  *
 586  * Assumes op3 header is already embedded.
 587  * Calls setsockopt() with IP_FW3 as kernel-visible opcode.
 588  * Returns 0 on success or errno otherwise.
 589  */
 590 int
 591 do_set3(int optname, ip_fw3_opheader *op3, uintptr_t optlen)
 592 {
 593
 594         if (co.test_only)
 595                 return (0);
 596
 597         if (ipfw_socket == -1)
 598                 ipfw_socket = socket(AF_INET, SOCK_RAW, IPPROTO_RAW);
 599         if (ipfw_socket < 0)
 600                 err(EX_UNAVAILABLE, "socket");
 601
 602         op3->opcode = optname;
 603
 604         return (setsockopt(ipfw_socket, IPPROTO_IP, IP_FW3, op3, optlen));
 605 }
 606
 607 /*
 608  * do_get3 - pass ipfw control cmd to kernel
 609  * @optname: option name
 610  * @optval: pointer to option data
 611  * @optlen: pointer to option length
 612  *
 613  * Assumes op3 header is already embedded.
 614  * Calls getsockopt() with IP_FW3 as kernel-visible opcode.
 615  * Returns 0 on success or errno otherwise.
 616  */
 617 int
 618 do_get3(int optname, ip_fw3_opheader *op3, size_t *optlen)
 619 {
 620         int error;
 621
 622         if (co.test_only)
 623                 return (0);
 624
 625         if (ipfw_socket == -1)
 626                 ipfw_socket = socket(AF_INET, SOCK_RAW, IPPROTO_RAW);
 627         if (ipfw_socket < 0)
 628                 err(EX_UNAVAILABLE, "socket");
 629
 630         op3->opcode = optname;
 631
 632         error = getsockopt(ipfw_socket, IPPROTO_IP, IP_FW3, op3,
 633             (socklen_t *)optlen);
 634
 635         return (error);
 636 }
 637
 638 /**
 639  * match_token takes a table and a string, returns the value associated
 640  * with the string (-1 in case of failure).
 641  */
 642 int
 643 match_token(struct _s_x *table, const char *string)
 644 {
 645         struct _s_x *pt;
 646         uint i = strlen(string);
 647
 648         for (pt = table ; i && pt->s != NULL ; pt++)
 649                 if (strlen(pt->s) == i && !bcmp(string, pt->s, i))
 650                         return pt->x;
 651         return (-1);
 652 }
 653
 654 /**
 655  * match_token_relaxed takes a table and a string, returns the value associated
 656  * with the string for the best match.
 657  *
 658  * Returns:
 659  * value from @table for matched records
 660  * -1 for non-matched records
 661  * -2 if more than one records match @string.
 662  */
 663 int
 664 match_token_relaxed(struct _s_x *table, const char *string)
 665 {
 666         struct _s_x *pt, *m;
 667         int i, c;
 668
 669         i = strlen(string);
 670         c = 0;
 671
 672         for (pt = table ; i != 0 && pt->s != NULL ; pt++) {
 673                 if (strncmp(pt->s, string, i) != 0)
 674                         continue;
 675                 m = pt;
 676                 c++;
 677         }
 678
 679         if (c == 1)
 680                 return (m->x);
 681
 682         return (c > 0 ? -2: -1);
 683 }
 684
 685 int
 686 get_token(struct _s_x *table, const char *string, const char *errbase)
 687 {
 688         int tcmd;
 689
 690         if ((tcmd = match_token_relaxed(table, string)) < 0)
 691                 errx(EX_USAGE, "%s %s %s",
 692                     (tcmd == 0) ? "invalid" : "ambiguous", errbase, string);
 693
 694         return (tcmd);
 695 }
 696
 697 /**
 698  * match_value takes a table and a value, returns the string associated
 699  * with the value (NULL in case of failure).
 700  */
 701 char const *
 702 match_value(struct _s_x *p, int value)
 703 {
 704         for (; p->s != NULL; p++)
 705                 if (p->x == value)
 706                         return p->s;
 707         return NULL;
 708 }
 709
 710 size_t
 711 concat_tokens(char *buf, size_t bufsize, struct _s_x *table, char *delimiter)
 712 {
 713         struct _s_x *pt;
 714         int l;
 715         size_t sz;
 716
 717         for (sz = 0, pt = table ; pt->s != NULL; pt++) {
 718                 l = snprintf(buf + sz, bufsize - sz, "%s%s",
 719                     (sz == 0) ? "" : delimiter, pt->s);
 720                 sz += l;
 721                 bufsize += l;
 722                 if (sz > bufsize)
 723                         return (bufsize);
 724         }
 725
 726         return (sz);
 727 }
 728
 729 /*
 730  * helper function to process a set of flags and set bits in the
 731  * appropriate masks.
 732  */
 733 int
 734 fill_flags(struct _s_x *flags, char *p, char **e, uint32_t *set,
 735     uint32_t *clear)
 736 {
 737         char *q;        /* points to the separator */
 738         int val;
 739         uint32_t *which;        /* mask we are working on */
 740
 741         while (p && *p) {
 742                 if (*p == '!') {
 743                         p++;
 744                         which = clear;
 745                 } else
 746                         which = set;
 747                 q = strchr(p, ',');
 748                 if (q)
 749                         *q++ = '\0';
 750                 val = match_token(flags, p);
 751                 if (val <= 0) {
 752                         if (e != NULL)
 753                                 *e = p;
 754                         return (-1);
 755                 }
 756                 *which |= (uint32_t)val;
 757                 p = q;
 758         }
 759         return (0);
 760 }
 761
 762 void
 763 print_flags_buffer(char *buf, size_t sz, struct _s_x *list, uint32_t set)
 764 {
 765         char const *comma = "";
 766         int i, l;
 767
 768         for (i = 0; list[i].x != 0; i++) {
 769                 if ((set & list[i].x) == 0)
 770                         continue;
 771
 772                 set &= ~list[i].x;
 773                 l = snprintf(buf, sz, "%s%s", comma, list[i].s);
 774                 if (l >= sz)
 775                         return;
 776                 comma = ",";
 777                 buf += l;
 778                 sz -=l;
 779         }
 780 }
 781
 782 /*
 783  * _substrcmp takes two strings and returns 1 if they do not match,
 784  * and 0 if they match exactly or the first string is a sub-string
 785  * of the second.  A warning is printed to stderr in the case that the
 786  * first string is a sub-string of the second.
 787  *
 788  * This function will be removed in the future through the usual
 789  * deprecation process.
 790  */
 791 int
 792 _substrcmp(const char *str1, const char* str2)
 793 {
 794
 795         if (strncmp(str1, str2, strlen(str1)) != 0)
 796                 return 1;
 797
 798         if (strlen(str1) != strlen(str2))
 799                 warnx("DEPRECATED: '%s' matched '%s' as a sub-string",
 800                     str1, str2);
 801         return 0;
 802 }
 803
 804 /*
 805  * _substrcmp2 takes three strings and returns 1 if the first two do not match,
 806  * and 0 if they match exactly or the second string is a sub-string
 807  * of the first.  A warning is printed to stderr in the case that the
 808  * first string does not match the third.
 809  *
 810  * This function exists to warn about the bizarre construction
 811  * strncmp(str, "by", 2) which is used to allow people to use a shortcut
 812  * for "bytes".  The problem is that in addition to accepting "by",
 813  * "byt", "byte", and "bytes", it also excepts "by_rabid_dogs" and any
 814  * other string beginning with "by".
 815  *
 816  * This function will be removed in the future through the usual
 817  * deprecation process.
 818  */
 819 int
 820 _substrcmp2(const char *str1, const char* str2, const char* str3)
 821 {
 822
 823         if (strncmp(str1, str2, strlen(str2)) != 0)
 824                 return 1;
 825
 826         if (strcmp(str1, str3) != 0)
 827                 warnx("DEPRECATED: '%s' matched '%s'",
 828                     str1, str3);
 829         return 0;
 830 }
 831
 832 /*
 833  * prints one port, symbolic or numeric
 834  */
 835 static void
 836 print_port(struct buf_pr *bp, int proto, uint16_t port)
 837 {
 838
 839         if (proto == IPPROTO_ETHERTYPE) {
 840                 char const *s;
 841
 842                 if (co.do_resolv && (s = match_value(ether_types, port)) )
 843                         bprintf(bp, "%s", s);
 844                 else
 845                         bprintf(bp, "0x%04x", port);
 846         } else {
 847                 struct servent *se = NULL;
 848                 if (co.do_resolv) {
 849                         struct protoent *pe = getprotobynumber(proto);
 850
 851                         se = getservbyport(htons(port), pe ? pe->p_name : NULL);
 852                 }
 853                 if (se)
 854                         bprintf(bp, "%s", se->s_name);
 855                 else
 856                         bprintf(bp, "%d", port);
 857         }
 858 }
 859
 860 static struct _s_x _port_name[] = {
 861         {"dst-port",    O_IP_DSTPORT},
 862         {"src-port",    O_IP_SRCPORT},
 863         {"ipid",        O_IPID},
 864         {"iplen",       O_IPLEN},
 865         {"ipttl",       O_IPTTL},
 866         {"mac-type",    O_MAC_TYPE},
 867         {"tcpdatalen",  O_TCPDATALEN},
 868         {"tcpwin",      O_TCPWIN},
 869         {"tagged",      O_TAGGED},
 870         {NULL,          0}
 871 };
 872
 873 /*
 874  * Print the values in a list 16-bit items of the types above.
 875  * XXX todo: add support for mask.
 876  */
 877 static void
 878 print_newports(struct buf_pr *bp, ipfw_insn_u16 *cmd, int proto, int opcode)
 879 {
 880         uint16_t *p = cmd->ports;
 881         int i;
 882         char const *sep;
 883
 884         if (opcode != 0) {
 885                 sep = match_value(_port_name, opcode);
 886                 if (sep == NULL)
 887                         sep = "???";
 888                 bprintf(bp, " %s", sep);
 889         }
 890         sep = " ";
 891         for (i = F_LEN((ipfw_insn *)cmd) - 1; i > 0; i--, p += 2) {
 892                 bprintf(bp, "%s", sep);
 893                 print_port(bp, proto, p[0]);
 894                 if (p[0] != p[1]) {
 895                         bprintf(bp, "-");
 896                         print_port(bp, proto, p[1]);
 897                 }
 898                 sep = ",";
 899         }
 900 }
 901
 902 /*
 903  * Like strtol, but also translates service names into port numbers
 904  * for some protocols.
 905  * In particular:
 906  *      proto == -1 disables the protocol check;
 907  *      proto == IPPROTO_ETHERTYPE looks up an internal table
 908  *      proto == <some value in /etc/protocols> matches the values there.
 909  * Returns *end == s in case the parameter is not found.
 910  */
 911 static int
 912 strtoport(char *s, char **end, int base, int proto)
 913 {
 914         char *p, *buf;
 915         char *s1;
 916         int i;
 917
 918         *end = s;               /* default - not found */
 919         if (*s == '\0')
 920                 return 0;       /* not found */
 921
 922         if (isdigit(*s))
 923                 return strtol(s, end, base);
 924
 925         /*
 926          * find separator. '\\' escapes the next char.
 927          */
 928         for (s1 = s; *s1 && (isalnum(*s1) || *s1 == '\\') ; s1++)
 929                 if (*s1 == '\\' && s1[1] != '\0')
 930                         s1++;
 931
 932         buf = safe_calloc(s1 - s + 1, 1);
 933
 934         /*
 935          * copy into a buffer skipping backslashes
 936          */
 937         for (p = s, i = 0; p != s1 ; p++)
 938                 if (*p != '\\')
 939                         buf[i++] = *p;
 940         buf[i++] = '\0';
 941
 942         if (proto == IPPROTO_ETHERTYPE) {
 943                 i = match_token(ether_types, buf);
 944                 free(buf);
 945                 if (i != -1) {  /* found */
 946                         *end = s1;
 947                         return i;
 948                 }
 949         } else {
 950                 struct protoent *pe = NULL;
 951                 struct servent *se;
 952
 953                 if (proto != 0)
 954                         pe = getprotobynumber(proto);
 955                 setservent(1);
 956                 se = getservbyname(buf, pe ? pe->p_name : NULL);
 957                 free(buf);
 958                 if (se != NULL) {
 959                         *end = s1;
 960                         return ntohs(se->s_port);
 961                 }
 962         }
 963         return 0;       /* not found */
 964 }
 965
 966 /*
 967  * Fill the body of the command with the list of port ranges.
 968  */
 969 static int
 970 fill_newports(ipfw_insn_u16 *cmd, char *av, int proto, int cblen)
 971 {
 972         uint16_t a, b, *p = cmd->ports;
 973         int i = 0;
 974         char *s = av;
 975
 976         while (*s) {
 977                 a = strtoport(av, &s, 0, proto);
 978                 if (s == av)                    /* empty or invalid argument */
 979                         return (0);
 980
 981                 CHECK_LENGTH(cblen, i + 2);
 982
 983                 switch (*s) {
 984                 case '-':                       /* a range */
 985                         av = s + 1;
 986                         b = strtoport(av, &s, 0, proto);
 987                         /* Reject expressions like '1-abc' or '1-2-3'. */
 988                         if (s == av || (*s != ',' && *s != '\0'))
 989                                 return (0);
 990                         p[0] = a;
 991                         p[1] = b;
 992                         break;
 993                 case ',':                       /* comma separated list */
 994                 case '\0':
 995                         p[0] = p[1] = a;
 996                         break;
 997                 default:
 998                         warnx("port list: invalid separator <%c> in <%s>",
 999                                 *s, av);
1000                         return (0);
1001                 }
1002
1003                 i++;
1004                 p += 2;
1005                 av = s + 1;
1006         }
1007         if (i > 0) {
1008                 if (i + 1 > F_LEN_MASK)
1009                         errx(EX_DATAERR, "too many ports/ranges\n");
1010                 cmd->o.len |= i + 1;    /* leave F_NOT and F_OR untouched */
1011         }
1012         return (i);
1013 }
1014
1015 /*
1016  * Fill the body of the command with the list of DiffServ codepoints.
1017  */
1018 static void
1019 fill_dscp(ipfw_insn *cmd, char *av, int cblen)
1020 {
1021         uint32_t *low, *high;
1022         char *s = av, *a;
1023         int code;
1024
1025         cmd->opcode = O_DSCP;
1026         cmd->len |= F_INSN_SIZE(ipfw_insn_u32) + 1;
1027
1028         CHECK_CMDLEN;
1029
1030         low = (uint32_t *)(cmd + 1);
1031         high = low + 1;
1032
1033         *low = 0;
1034         *high = 0;
1035
1036         while (s != NULL) {
1037                 a = strchr(s, ',');
1038
1039                 if (a != NULL)
1040                         *a++ = '\0';
1041
1042                 if (isalpha(*s)) {
1043                         if ((code = match_token(f_ipdscp, s)) == -1)
1044                                 errx(EX_DATAERR, "Unknown DSCP code");
1045                 } else {
1046                         code = strtoul(s, NULL, 10);
1047                         if (code < 0 || code > 63)
1048                                 errx(EX_DATAERR, "Invalid DSCP value");
1049                 }
1050
1051                 if (code >= 32)
1052                         *high |= 1 << (code - 32);
1053                 else
1054                         *low |= 1 << code;
1055
1056                 s = a;
1057         }
1058 }
1059
1060 static struct _s_x icmpcodes[] = {
1061       { "net",                  ICMP_UNREACH_NET },
1062       { "host",                 ICMP_UNREACH_HOST },
1063       { "protocol",             ICMP_UNREACH_PROTOCOL },
1064       { "port",                 ICMP_UNREACH_PORT },
1065       { "needfrag",             ICMP_UNREACH_NEEDFRAG },
1066       { "srcfail",              ICMP_UNREACH_SRCFAIL },
1067       { "net-unknown",          ICMP_UNREACH_NET_UNKNOWN },
1068       { "host-unknown",         ICMP_UNREACH_HOST_UNKNOWN },
1069       { "isolated",             ICMP_UNREACH_ISOLATED },
1070       { "net-prohib",           ICMP_UNREACH_NET_PROHIB },
1071       { "host-prohib",          ICMP_UNREACH_HOST_PROHIB },
1072       { "tosnet",               ICMP_UNREACH_TOSNET },
1073       { "toshost",              ICMP_UNREACH_TOSHOST },
1074       { "filter-prohib",        ICMP_UNREACH_FILTER_PROHIB },
1075       { "host-precedence",      ICMP_UNREACH_HOST_PRECEDENCE },
1076       { "precedence-cutoff",    ICMP_UNREACH_PRECEDENCE_CUTOFF },
1077       { NULL, 0 }
1078 };
1079
1080 static void
1081 fill_reject_code(u_short *codep, char *str)
1082 {
1083         int val;
1084         char *s;
1085
1086         val = strtoul(str, &s, 0);
1087         if (s == str || *s != '\0' || val >= 0x100)
1088                 val = match_token(icmpcodes, str);
1089         if (val < 0)
1090                 errx(EX_DATAERR, "unknown ICMP unreachable code ``%s''", str);
1091         *codep = val;
1092         return;
1093 }
1094
1095 static void
1096 print_reject_code(struct buf_pr *bp, uint16_t code)
1097 {
1098         char const *s;
1099
1100         if ((s = match_value(icmpcodes, code)) != NULL)
1101                 bprintf(bp, "unreach %s", s);
1102         else
1103                 bprintf(bp, "unreach %u", code);
1104 }
1105
1106 /*
1107  * Returns the number of bits set (from left) in a contiguous bitmask,
1108  * or -1 if the mask is not contiguous.
1109  * XXX this needs a proper fix.
1110  * This effectively works on masks in big-endian (network) format.
1111  * when compiled on little endian architectures.
1112  *
1113  * First bit is bit 7 of the first byte -- note, for MAC addresses,
1114  * the first bit on the wire is bit 0 of the first byte.
1115  * len is the max length in bits.
1116  */
1117 int
1118 contigmask(uint8_t *p, int len)
1119 {
1120         int i, n;
1121
1122         for (i=0; i<len ; i++)
1123                 if ( (p[i/8] & (1 << (7 - (i%8)))) == 0) /* first bit unset */
1124                         break;
1125         for (n=i+1; n < len; n++)
1126                 if ( (p[n/8] & (1 << (7 - (n%8)))) != 0)
1127                         return -1; /* mask not contiguous */
1128         return i;
1129 }
1130
1131 /*
1132  * print flags set/clear in the two bitmasks passed as parameters.
1133  * There is a specialized check for f_tcpflags.
1134  */
1135 static void
1136 print_flags(struct buf_pr *bp, char const *name, ipfw_insn *cmd,
1137     struct _s_x *list)
1138 {
1139         char const *comma = "";
1140         int i;
1141         uint8_t set = cmd->arg1 & 0xff;
1142         uint8_t clear = (cmd->arg1 >> 8) & 0xff;
1143
1144         if (list == f_tcpflags && set == TH_SYN && clear == TH_ACK) {
1145                 bprintf(bp, " setup");
1146                 return;
1147         }
1148
1149         bprintf(bp, " %s ", name);
1150         for (i=0; list[i].x != 0; i++) {
1151                 if (set & list[i].x) {
1152                         set &= ~list[i].x;
1153                         bprintf(bp, "%s%s", comma, list[i].s);
1154                         comma = ",";
1155                 }
1156                 if (clear & list[i].x) {
1157                         clear &= ~list[i].x;
1158                         bprintf(bp, "%s!%s", comma, list[i].s);
1159                         comma = ",";
1160                 }
1161         }
1162 }
1163
1164
1165 /*
1166  * Print the ip address contained in a command.
1167  */
1168 static void
1169 print_ip(struct buf_pr *bp, struct format_opts *fo, ipfw_insn_ip *cmd,
1170     char const *s)
1171 {
1172         struct hostent *he = NULL;
1173         struct in_addr *ia;
1174         uint32_t len = F_LEN((ipfw_insn *)cmd);
1175         uint32_t *a = ((ipfw_insn_u32 *)cmd)->d;
1176         char *t;
1177
1178         if (cmd->o.opcode == O_IP_DST_LOOKUP && len > F_INSN_SIZE(ipfw_insn_u32)) {
1179                 uint32_t d = a[1];
1180                 const char *arg = "<invalid>";
1181
1182                 if (d < sizeof(lookup_key)/sizeof(lookup_key[0]))
1183                         arg = match_value(rule_options, lookup_key[d]);
1184                 t = table_search_ctlv(fo->tstate, ((ipfw_insn *)cmd)->arg1);
1185                 bprintf(bp, "%s lookup %s %s", cmd->o.len & F_NOT ? " not": "",
1186                         arg, t);
1187                 return;
1188         }
1189         bprintf(bp, "%s%s ", cmd->o.len & F_NOT ? " not": "", s);
1190
1191         if (cmd->o.opcode == O_IP_SRC_ME || cmd->o.opcode == O_IP_DST_ME) {
1192                 bprintf(bp, "me");
1193                 return;
1194         }
1195         if (cmd->o.opcode == O_IP_SRC_LOOKUP ||
1196             cmd->o.opcode == O_IP_DST_LOOKUP) {
1197                 t = table_search_ctlv(fo->tstate, ((ipfw_insn *)cmd)->arg1);
1198                 bprintf(bp, "table(%s", t);
1199                 if (len == F_INSN_SIZE(ipfw_insn_u32))
1200                         bprintf(bp, ",%u", *a);
1201                 bprintf(bp, ")");
1202                 return;
1203         }
1204         if (cmd->o.opcode == O_IP_SRC_SET || cmd->o.opcode == O_IP_DST_SET) {
1205                 uint32_t x, *map = (uint32_t *)&(cmd->mask);
1206                 int i, j;
1207                 char comma = '{';
1208
1209                 x = cmd->o.arg1 - 1;
1210                 x = htonl( ~x );
1211                 cmd->addr.s_addr = htonl(cmd->addr.s_addr);
1212                 bprintf(bp, "%s/%d", inet_ntoa(cmd->addr),
1213                         contigmask((uint8_t *)&x, 32));
1214                 x = cmd->addr.s_addr = htonl(cmd->addr.s_addr);
1215                 x &= 0xff; /* base */
1216                 /*
1217                  * Print bits and ranges.
1218                  * Locate first bit set (i), then locate first bit unset (j).
1219                  * If we have 3+ consecutive bits set, then print them as a
1220                  * range, otherwise only print the initial bit and rescan.
1221                  */
1222                 for (i=0; i < cmd->o.arg1; i++)
1223                         if (map[i/32] & (1<<(i & 31))) {
1224                                 for (j=i+1; j < cmd->o.arg1; j++)
1225                                         if (!(map[ j/32] & (1<<(j & 31))))
1226                                                 break;
1227                                 bprintf(bp, "%c%d", comma, i+x);
1228                                 if (j>i+2) { /* range has at least 3 elements */
1229                                         bprintf(bp, "-%d", j-1+x);
1230                                         i = j-1;
1231                                 }
1232                                 comma = ',';
1233                         }
1234                 bprintf(bp, "}");
1235                 return;
1236         }
1237         /*
1238          * len == 2 indicates a single IP, whereas lists of 1 or more
1239          * addr/mask pairs have len = (2n+1). We convert len to n so we
1240          * use that to count the number of entries.
1241          */
1242     for (len = len / 2; len > 0; len--, a += 2) {
1243         int mb =        /* mask length */
1244             (cmd->o.opcode == O_IP_SRC || cmd->o.opcode == O_IP_DST) ?
1245                 32 : contigmask((uint8_t *)&(a[1]), 32);
1246         if (mb == 32 && co.do_resolv)
1247                 he = gethostbyaddr((char *)&(a[0]), sizeof(u_long), AF_INET);
1248         if (he != NULL)         /* resolved to name */
1249                 bprintf(bp, "%s", he->h_name);
1250         else if (mb == 0)       /* any */
1251                 bprintf(bp, "any");
1252         else {          /* numeric IP followed by some kind of mask */
1253                 ia = (struct in_addr *)&a[0];
1254                 bprintf(bp, "%s", inet_ntoa(*ia));
1255                 if (mb < 0) {
1256                         ia = (struct in_addr *)&a[1];
1257                         bprintf(bp, ":%s", inet_ntoa(*ia));
1258                 } else if (mb < 32)
1259                         bprintf(bp, "/%d", mb);
1260         }
1261         if (len > 1)
1262                 bprintf(bp, ",");
1263     }
1264 }
1265
1266 /*
1267  * prints a MAC address/mask pair
1268  */
1269 static void
1270 print_mac(struct buf_pr *bp, uint8_t *addr, uint8_t *mask)
1271 {
1272         int l = contigmask(mask, 48);
1273
1274         if (l == 0)
1275                 bprintf(bp, " any");
1276         else {
1277                 bprintf(bp, " %02x:%02x:%02x:%02x:%02x:%02x",
1278                     addr[0], addr[1], addr[2], addr[3], addr[4], addr[5]);
1279                 if (l == -1)
1280                         bprintf(bp, "&%02x:%02x:%02x:%02x:%02x:%02x",
1281                             mask[0], mask[1], mask[2],
1282                             mask[3], mask[4], mask[5]);
1283                 else if (l < 48)
1284                         bprintf(bp, "/%d", l);
1285         }
1286 }
1287
1288 static void
1289 fill_icmptypes(ipfw_insn_u32 *cmd, char *av)
1290 {
1291         uint8_t type;
1292
1293         cmd->d[0] = 0;
1294         while (*av) {
1295                 if (*av == ',')
1296                         av++;
1297
1298                 type = strtoul(av, &av, 0);
1299
1300                 if (*av != ',' && *av != '\0')
1301                         errx(EX_DATAERR, "invalid ICMP type");
1302
1303                 if (type > 31)
1304                         errx(EX_DATAERR, "ICMP type out of range");
1305
1306                 cmd->d[0] |= 1 << type;
1307         }
1308         cmd->o.opcode = O_ICMPTYPE;
1309         cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32);
1310 }
1311
1312 static void
1313 print_icmptypes(struct buf_pr *bp, ipfw_insn_u32 *cmd)
1314 {
1315         int i;
1316         char sep= ' ';
1317
1318         bprintf(bp, " icmptypes");
1319         for (i = 0; i < 32; i++) {
1320                 if ( (cmd->d[0] & (1 << (i))) == 0)
1321                         continue;
1322                 bprintf(bp, "%c%d", sep, i);
1323                 sep = ',';
1324         }
1325 }
1326
1327 static void
1328 print_dscp(struct buf_pr *bp, ipfw_insn_u32 *cmd)
1329 {
1330         int i = 0;
1331         uint32_t *v;
1332         char sep= ' ';
1333         const char *code;
1334
1335         bprintf(bp, " dscp");
1336         v = cmd->d;
1337         while (i < 64) {
1338                 if (*v & (1 << i)) {
1339                         if ((code = match_value(f_ipdscp, i)) != NULL)
1340                                 bprintf(bp, "%c%s", sep, code);
1341                         else
1342                                 bprintf(bp, "%c%d", sep, i);
1343                         sep = ',';
1344                 }
1345
1346                 if ((++i % 32) == 0)
1347                         v++;
1348         }
1349 }
1350
1351 /*
1352  * show_ipfw() prints the body of an ipfw rule.
1353  * Because the standard rule has at least proto src_ip dst_ip, we use
1354  * a helper function to produce these entries if not provided explicitly.
1355  * The first argument is the list of fields we have, the second is
1356  * the list of fields we want to be printed.
1357  *
1358  * Special cases if we have provided a MAC header:
1359  *   + if the rule does not contain IP addresses/ports, do not print them;
1360  *   + if the rule does not contain an IP proto, print "all" instead of "ip";
1361  *
1362  * Once we have 'have_options', IP header fields are printed as options.
1363  */
1364 #define HAVE_PROTO      0x0001
1365 #define HAVE_SRCIP      0x0002
1366 #define HAVE_DSTIP      0x0004
1367 #define HAVE_PROTO4     0x0008
1368 #define HAVE_PROTO6     0x0010
1369 #define HAVE_IP         0x0100
1370 #define HAVE_OPTIONS    0x8000
1371
1372 static void
1373 show_prerequisites(struct buf_pr *bp, int *flags, int want, int cmd)
1374 {
1375         (void)cmd;      /* UNUSED */
1376         if (co.comment_only)
1377                 return;
1378         if ( (*flags & HAVE_IP) == HAVE_IP)
1379                 *flags |= HAVE_OPTIONS;
1380
1381         if ( !(*flags & HAVE_OPTIONS)) {
1382                 if ( !(*flags & HAVE_PROTO) && (want & HAVE_PROTO)) {
1383                         if ( (*flags & HAVE_PROTO4))
1384                                 bprintf(bp, " ip4");
1385                         else if ( (*flags & HAVE_PROTO6))
1386                                 bprintf(bp, " ip6");
1387                         else
1388                                 bprintf(bp, " ip");
1389                 }
1390                 if ( !(*flags & HAVE_SRCIP) && (want & HAVE_SRCIP))
1391                         bprintf(bp, " from any");
1392                 if ( !(*flags & HAVE_DSTIP) && (want & HAVE_DSTIP))
1393                         bprintf(bp, " to any");
1394         }
1395         *flags |= want;
1396 }
1397
1398 static void
1399 show_static_rule(struct cmdline_opts *co, struct format_opts *fo,
1400     struct buf_pr *bp, struct ip_fw_rule *rule, struct ip_fw_bcounter *cntr)
1401 {
1402         static int twidth = 0;
1403         int l;
1404         ipfw_insn *cmd, *has_eaction = NULL, *tagptr = NULL;
1405         const char *comment = NULL;     /* ptr to comment if we have one */
1406         int proto = 0;          /* default */
1407         int flags = 0;  /* prerequisites */
1408         ipfw_insn_log *logptr = NULL; /* set if we find an O_LOG */
1409         ipfw_insn_altq *altqptr = NULL; /* set if we find an O_ALTQ */
1410         int or_block = 0;       /* we are in an or block */
1411         uint32_t uval;
1412
1413         if ((fo->set_mask & (1 << rule->set)) == 0) {
1414                 /* disabled mask */
1415                 if (!co->show_sets)
1416                         return;
1417                 else
1418                         bprintf(bp, "# DISABLED ");
1419         }
1420         bprintf(bp, "%05u ", rule->rulenum);
1421
1422         /* Print counters if enabled */
1423         if (fo->pcwidth > 0 || fo->bcwidth > 0) {
1424                 pr_u64(bp, &cntr->pcnt, fo->pcwidth);
1425                 pr_u64(bp, &cntr->bcnt, fo->bcwidth);
1426         }
1427
1428         if (co->do_time == 2)
1429                 bprintf(bp, "%10u ", cntr->timestamp);
1430         else if (co->do_time == 1) {
1431                 char timestr[30];
1432                 time_t t = (time_t)0;
1433
1434                 if (twidth == 0) {
1435                         strcpy(timestr, ctime(&t));
1436                         *strchr(timestr, '\n') = '\0';
1437                         twidth = strlen(timestr);
1438                 }
1439                 if (cntr->timestamp > 0) {
1440                         t = _long_to_time(cntr->timestamp);
1441
1442                         strcpy(timestr, ctime(&t));
1443                         *strchr(timestr, '\n') = '\0';
1444                         bprintf(bp, "%s ", timestr);
1445                 } else {
1446                         bprintf(bp, "%*s", twidth, " ");
1447                 }
1448         }
1449
1450         if (co->show_sets)
1451                 bprintf(bp, "set %d ", rule->set);
1452
1453         /*
1454          * print the optional "match probability"
1455          */
1456         if (rule->cmd_len > 0) {
1457                 cmd = rule->cmd ;
1458                 if (cmd->opcode == O_PROB) {
1459                         ipfw_insn_u32 *p = (ipfw_insn_u32 *)cmd;
1460                         double d = 1.0 * p->d[0];
1461
1462                         d = (d / 0x7fffffff);
1463                         bprintf(bp, "prob %f ", d);
1464                 }
1465         }
1466
1467         /*
1468          * first print actions
1469          */
1470         for (l = rule->cmd_len - rule->act_ofs, cmd = ACTION_PTR(rule);
1471                         l > 0 ; l -= F_LEN(cmd), cmd += F_LEN(cmd)) {
1472                 switch(cmd->opcode) {
1473                 case O_CHECK_STATE:
1474                         bprintf(bp, "check-state");
1475                         /* avoid printing anything else */
1476                         flags = HAVE_PROTO | HAVE_SRCIP |
1477                                 HAVE_DSTIP | HAVE_IP;
1478                         break;
1479
1480                 case O_ACCEPT:
1481                         bprintf(bp, "allow");
1482                         break;
1483
1484                 case O_COUNT:
1485                         bprintf(bp, "count");
1486                         break;
1487
1488                 case O_DENY:
1489                         bprintf(bp, "deny");
1490                         break;
1491
1492                 case O_REJECT:
1493                         if (cmd->arg1 == ICMP_REJECT_RST)
1494                                 bprintf(bp, "reset");
1495                         else if (cmd->arg1 == ICMP_UNREACH_HOST)
1496                                 bprintf(bp, "reject");
1497                         else
1498                                 print_reject_code(bp, cmd->arg1);
1499                         break;
1500
1501                 case O_UNREACH6:
1502                         if (cmd->arg1 == ICMP6_UNREACH_RST)
1503                                 bprintf(bp, "reset6");
1504                         else
1505                                 print_unreach6_code(bp, cmd->arg1);
1506                         break;
1507
1508                 case O_SKIPTO:
1509                         bprint_uint_arg(bp, "skipto ", cmd->arg1);
1510                         break;
1511
1512                 case O_PIPE:
1513                         bprint_uint_arg(bp, "pipe ", cmd->arg1);
1514                         break;
1515
1516                 case O_QUEUE:
1517                         bprint_uint_arg(bp, "queue ", cmd->arg1);
1518                         break;
1519
1520                 case O_DIVERT:
1521                         bprint_uint_arg(bp, "divert ", cmd->arg1);
1522                         break;
1523
1524                 case O_TEE:
1525                         bprint_uint_arg(bp, "tee ", cmd->arg1);
1526                         break;
1527
1528                 case O_NETGRAPH:
1529                         bprint_uint_arg(bp, "netgraph ", cmd->arg1);
1530                         break;
1531
1532                 case O_NGTEE:
1533                         bprint_uint_arg(bp, "ngtee ", cmd->arg1);
1534                         break;
1535
1536                 case O_FORWARD_IP:
1537                     {
1538                         ipfw_insn_sa *s = (ipfw_insn_sa *)cmd;
1539
1540                         if (s->sa.sin_addr.s_addr == INADDR_ANY) {
1541                                 bprintf(bp, "fwd tablearg");
1542                         } else {
1543                                 bprintf(bp, "fwd %s",inet_ntoa(s->sa.sin_addr));
1544                         }
1545                         if (s->sa.sin_port)
1546                                 bprintf(bp, ",%d", s->sa.sin_port);
1547                     }
1548                         break;
1549
1550                 case O_FORWARD_IP6:
1551                     {
1552                         char buf[INET6_ADDRSTRLEN + IF_NAMESIZE + 2];
1553                         ipfw_insn_sa6 *s = (ipfw_insn_sa6 *)cmd;
1554
1555                         bprintf(bp, "fwd ");
1556                         if (getnameinfo((const struct sockaddr *)&s->sa,
1557                             sizeof(struct sockaddr_in6), buf, sizeof(buf),
1558                             NULL, 0, NI_NUMERICHOST) == 0)
1559                                 bprintf(bp, "%s", buf);
1560                         if (s->sa.sin6_port)
1561                                 bprintf(bp, ",%d", s->sa.sin6_port);
1562                     }
1563                         break;
1564
1565                 case O_LOG: /* O_LOG is printed last */
1566                         logptr = (ipfw_insn_log *)cmd;
1567                         break;
1568
1569                 case O_ALTQ: /* O_ALTQ is printed after O_LOG */
1570                         altqptr = (ipfw_insn_altq *)cmd;
1571                         break;
1572
1573                 case O_TAG:
1574                         tagptr = cmd;
1575                         break;
1576
1577                 case O_NAT:
1578                         if (cmd->arg1 != 0)
1579                                 bprint_uint_arg(bp, "nat ", cmd->arg1);
1580                         else
1581                                 bprintf(bp, "nat global");
1582                         break;
1583
1584                 case O_SETFIB:
1585                         bprint_uint_arg(bp, "setfib ", cmd->arg1 & 0x7FFF);
1586                         break;
1587
1588                 case O_EXTERNAL_ACTION: {
1589                         const char *ename;
1590
1591                         /*
1592                          * The external action can consists of two following
1593                          * each other opcodes - O_EXTERNAL_ACTION and
1594                          * O_EXTERNAL_INSTANCE. The first contains the ID of
1595                          * name of external action. The second contains the ID
1596                          * of name of external action instance.
1597                          * NOTE: in case when external action has no named
1598                          * instances support, the second opcode isn't needed.
1599                          */
1600                         has_eaction = cmd;
1601                         ename = object_search_ctlv(fo->tstate, cmd->arg1,
1602                             IPFW_TLV_EACTION);
1603                         if (match_token(rule_eactions, ename) != -1)
1604                                 bprintf(bp, "%s", ename);
1605                         else
1606                                 bprintf(bp, "eaction %s", ename);
1607                         break;
1608                 }
1609
1610                 case O_EXTERNAL_INSTANCE: {
1611                         const char *ename;
1612
1613                         if (has_eaction == NULL)
1614                                 break;
1615                         /*
1616                          * XXX: we need to teach ipfw(9) to rewrite opcodes
1617                          * in the user buffer on rule addition. When we add
1618                          * the rule, we specify zero TLV type for
1619                          * O_EXTERNAL_INSTANCE object. To show correct
1620                          * rule after `ipfw add` we need to search instance
1621                          * name with zero type. But when we do `ipfw show`
1622                          * we calculate TLV type using IPFW_TLV_EACTION_NAME()
1623                          * macro.
1624                          */
1625                         ename = object_search_ctlv(fo->tstate, cmd->arg1, 0);
1626                         if (ename == NULL)
1627                                 ename = object_search_ctlv(fo->tstate,
1628                                     cmd->arg1,
1629                                     IPFW_TLV_EACTION_NAME(has_eaction->arg1));
1630                         bprintf(bp, " %s", ename);
1631                         break;
1632                 }
1633
1634                 case O_SETDSCP:
1635                     {
1636                         const char *code;
1637
1638                         if (cmd->arg1 == IP_FW_TARG) {
1639                                 bprint_uint_arg(bp, "setdscp ", cmd->arg1);
1640                                 break;
1641                         }
1642                         uval = cmd->arg1 & 0x3F;
1643                         if ((code = match_value(f_ipdscp, uval)) != NULL)
1644                                 bprintf(bp, "setdscp %s", code);
1645                         else
1646                                 bprint_uint_arg(bp, "setdscp ", uval);
1647                     }
1648                         break;
1649
1650                 case O_REASS:
1651                         bprintf(bp, "reass");
1652                         break;
1653
1654                 case O_CALLRETURN:
1655                         if (cmd->len & F_NOT)
1656                                 bprintf(bp, "return");
1657                         else
1658                                 bprint_uint_arg(bp, "call ", cmd->arg1);
1659                         break;
1660
1661                 default:
1662                         bprintf(bp, "** unrecognized action %d len %d ",
1663                                 cmd->opcode, cmd->len);
1664                 }
1665         }
1666         if (logptr) {
1667                 if (logptr->max_log > 0)
1668                         bprintf(bp, " log logamount %d", logptr->max_log);
1669                 else
1670                         bprintf(bp, " log");
1671         }
1672 #ifndef NO_ALTQ
1673         if (altqptr) {
1674                 print_altq_cmd(bp, altqptr);
1675         }
1676 #endif
1677         if (tagptr) {
1678                 if (tagptr->len & F_NOT)
1679                         bprint_uint_arg(bp, " untag ", tagptr->arg1);
1680                 else
1681                         bprint_uint_arg(bp, " tag ", tagptr->arg1);
1682         }
1683
1684         /*
1685          * then print the body.
1686          */
1687         for (l = rule->act_ofs, cmd = rule->cmd;
1688                         l > 0 ; l -= F_LEN(cmd) , cmd += F_LEN(cmd)) {
1689                 if ((cmd->len & F_OR) || (cmd->len & F_NOT))
1690                         continue;
1691                 if (cmd->opcode == O_IP4) {
1692                         flags |= HAVE_PROTO4;
1693                         break;
1694                 } else if (cmd->opcode == O_IP6) {
1695                         flags |= HAVE_PROTO6;
1696                         break;
1697                 }
1698         }
1699         if (rule->flags & IPFW_RULE_NOOPT) {    /* empty rules before options */
1700                 if (!co->do_compact) {
1701                         show_prerequisites(bp, &flags, HAVE_PROTO, 0);
1702                         bprintf(bp, " from any to any");
1703                 }
1704                 flags |= HAVE_IP | HAVE_OPTIONS | HAVE_PROTO |
1705                          HAVE_SRCIP | HAVE_DSTIP;
1706         }
1707
1708         if (co->comment_only)
1709                 comment = "...";
1710
1711         for (l = rule->act_ofs, cmd = rule->cmd;
1712                         l > 0 ; l -= F_LEN(cmd) , cmd += F_LEN(cmd)) {
1713                 /* useful alias */
1714                 ipfw_insn_u32 *cmd32 = (ipfw_insn_u32 *)cmd;
1715
1716                 if (co->comment_only) {
1717                         if (cmd->opcode != O_NOP)
1718                                 continue;
1719                         bprintf(bp, " // %s\n", (char *)(cmd + 1));
1720                         return;
1721                 }
1722
1723                 show_prerequisites(bp, &flags, 0, cmd->opcode);
1724
1725                 switch(cmd->opcode) {
1726                 case O_PROB:
1727                         break;  /* done already */
1728
1729                 case O_PROBE_STATE:
1730                         break; /* no need to print anything here */
1731
1732                 case O_IP_SRC:
1733                 case O_IP_SRC_LOOKUP:
1734                 case O_IP_SRC_MASK:
1735                 case O_IP_SRC_ME:
1736                 case O_IP_SRC_SET:
1737                         show_prerequisites(bp, &flags, HAVE_PROTO, 0);
1738                         if (!(flags & HAVE_SRCIP))
1739                                 bprintf(bp, " from");
1740                         if ((cmd->len & F_OR) && !or_block)
1741                                 bprintf(bp, " {");
1742                         print_ip(bp, fo, (ipfw_insn_ip *)cmd,
1743                                 (flags & HAVE_OPTIONS) ? " src-ip" : "");
1744                         flags |= HAVE_SRCIP;
1745                         break;
1746
1747                 case O_IP_DST:
1748                 case O_IP_DST_LOOKUP:
1749                 case O_IP_DST_MASK:
1750                 case O_IP_DST_ME:
1751                 case O_IP_DST_SET:
1752                         show_prerequisites(bp, &flags, HAVE_PROTO|HAVE_SRCIP, 0);
1753                         if (!(flags & HAVE_DSTIP))
1754                                 bprintf(bp, " to");
1755                         if ((cmd->len & F_OR) && !or_block)
1756                                 bprintf(bp, " {");
1757                         print_ip(bp, fo, (ipfw_insn_ip *)cmd,
1758                                 (flags & HAVE_OPTIONS) ? " dst-ip" : "");
1759                         flags |= HAVE_DSTIP;
1760                         break;
1761
1762                 case O_IP6_SRC:
1763                 case O_IP6_SRC_MASK:
1764                 case O_IP6_SRC_ME:
1765                         show_prerequisites(bp, &flags, HAVE_PROTO, 0);
1766                         if (!(flags & HAVE_SRCIP))
1767                                 bprintf(bp, " from");
1768                         if ((cmd->len & F_OR) && !or_block)
1769                                 bprintf(bp, " {");
1770                         print_ip6(bp, (ipfw_insn_ip6 *)cmd,
1771                             (flags & HAVE_OPTIONS) ? " src-ip6" : "");
1772                         flags |= HAVE_SRCIP | HAVE_PROTO;
1773                         break;
1774
1775                 case O_IP6_DST:
1776                 case O_IP6_DST_MASK:
1777                 case O_IP6_DST_ME:
1778                         show_prerequisites(bp, &flags, HAVE_PROTO|HAVE_SRCIP, 0);
1779                         if (!(flags & HAVE_DSTIP))
1780                                 bprintf(bp, " to");
1781                         if ((cmd->len & F_OR) && !or_block)
1782                                 bprintf(bp, " {");
1783                         print_ip6(bp, (ipfw_insn_ip6 *)cmd,
1784                             (flags & HAVE_OPTIONS) ? " dst-ip6" : "");
1785                         flags |= HAVE_DSTIP;
1786                         break;
1787
1788                 case O_FLOW6ID:
1789                         print_flow6id(bp, (ipfw_insn_u32 *) cmd );
1790                         flags |= HAVE_OPTIONS;
1791                         break;
1792
1793                 case O_IP_DSTPORT:
1794                         show_prerequisites(bp, &flags,
1795                                 HAVE_PROTO | HAVE_SRCIP |
1796                                 HAVE_DSTIP | HAVE_IP, 0);
1797                 case O_IP_SRCPORT:
1798                         if (flags & HAVE_DSTIP)
1799                                 flags |= HAVE_IP;
1800                         show_prerequisites(bp, &flags,
1801                                 HAVE_PROTO | HAVE_SRCIP, 0);
1802                         if ((cmd->len & F_OR) && !or_block)
1803                                 bprintf(bp, " {");
1804                         if (cmd->len & F_NOT)
1805                                 bprintf(bp, " not");
1806                         print_newports(bp, (ipfw_insn_u16 *)cmd, proto,
1807                                 (flags & HAVE_OPTIONS) ? cmd->opcode : 0);
1808                         break;
1809
1810                 case O_PROTO: {
1811                         struct protoent *pe = NULL;
1812
1813                         if ((cmd->len & F_OR) && !or_block)
1814                                 bprintf(bp, " {");
1815                         if (cmd->len & F_NOT)
1816                                 bprintf(bp, " not");
1817                         proto = cmd->arg1;
1818                         pe = getprotobynumber(cmd->arg1);
1819                         if ((flags & (HAVE_PROTO4 | HAVE_PROTO6)) &&
1820                             !(flags & HAVE_PROTO))
1821                                 show_prerequisites(bp, &flags,
1822                                     HAVE_PROTO | HAVE_IP | HAVE_SRCIP |
1823                                     HAVE_DSTIP | HAVE_OPTIONS, 0);
1824                         if (flags & HAVE_OPTIONS)
1825                                 bprintf(bp, " proto");
1826                         if (pe)
1827                                 bprintf(bp, " %s", pe->p_name);
1828                         else
1829                                 bprintf(bp, " %u", cmd->arg1);
1830                         }
1831                         flags |= HAVE_PROTO;
1832                         break;
1833
1834                 default: /*options ... */
1835                         if (!(cmd->len & (F_OR|F_NOT)))
1836                                 if (((cmd->opcode == O_IP6) &&
1837                                     (flags & HAVE_PROTO6)) ||
1838                                     ((cmd->opcode == O_IP4) &&
1839                                     (flags & HAVE_PROTO4)))
1840                                         break;
1841                         show_prerequisites(bp, &flags, HAVE_PROTO | HAVE_SRCIP |
1842                                     HAVE_DSTIP | HAVE_IP | HAVE_OPTIONS, 0);
1843                         if ((cmd->len & F_OR) && !or_block)
1844                                 bprintf(bp, " {");
1845                         if (cmd->len & F_NOT && cmd->opcode != O_IN)
1846                                 bprintf(bp, " not");
1847                         switch(cmd->opcode) {
1848                         case O_MACADDR2: {
1849                                 ipfw_insn_mac *m = (ipfw_insn_mac *)cmd;
1850
1851                                 bprintf(bp, " MAC");
1852                                 print_mac(bp, m->addr, m->mask);
1853                                 print_mac(bp, m->addr + 6, m->mask + 6);
1854                                 }
1855                                 break;
1856
1857                         case O_MAC_TYPE:
1858                                 print_newports(bp, (ipfw_insn_u16 *)cmd,
1859                                                 IPPROTO_ETHERTYPE, cmd->opcode);
1860                                 break;
1861
1862
1863                         case O_FRAG:
1864                                 bprintf(bp, " frag");
1865                                 break;
1866
1867                         case O_FIB:
1868                                 bprintf(bp, " fib %u", cmd->arg1 );
1869                                 break;
1870                         case O_SOCKARG:
1871                                 bprintf(bp, " sockarg");
1872                                 break;
1873
1874                         case O_IN:
1875                                 bprintf(bp, cmd->len & F_NOT ? " out" : " in");
1876                                 break;
1877
1878                         case O_DIVERTED:
1879                                 switch (cmd->arg1) {
1880                                 case 3:
1881                                         bprintf(bp, " diverted");
1882                                         break;
1883                                 case 1:
1884                                         bprintf(bp, " diverted-loopback");
1885                                         break;
1886                                 case 2:
1887                                         bprintf(bp, " diverted-output");
1888                                         break;
1889                                 default:
1890                                         bprintf(bp, " diverted-?<%u>", cmd->arg1);
1891                                         break;
1892                                 }
1893                                 break;
1894
1895                         case O_LAYER2:
1896                                 bprintf(bp, " layer2");
1897                                 break;
1898                         case O_XMIT:
1899                         case O_RECV:
1900                         case O_VIA:
1901                             {
1902                                 char const *s, *t;
1903                                 ipfw_insn_if *cmdif = (ipfw_insn_if *)cmd;
1904
1905                                 if (cmd->opcode == O_XMIT)
1906                                         s = "xmit";
1907                                 else if (cmd->opcode == O_RECV)
1908                                         s = "recv";
1909                                 else /* if (cmd->opcode == O_VIA) */
1910                                         s = "via";
1911                                 if (cmdif->name[0] == '\0')
1912                                         bprintf(bp, " %s %s", s,
1913                                             inet_ntoa(cmdif->p.ip));
1914                                 else if (cmdif->name[0] == '\1') {
1915                                         /* interface table */
1916                                         t = table_search_ctlv(fo->tstate,
1917                                             cmdif->p.kidx);
1918                                         bprintf(bp, " %s table(%s)", s, t);
1919                                 } else
1920                                         bprintf(bp, " %s %s", s, cmdif->name);
1921
1922                                 break;
1923                             }
1924                         case O_IP_FLOW_LOOKUP:
1925                             {
1926                                 char *t;
1927
1928                                 t = table_search_ctlv(fo->tstate, cmd->arg1);
1929                                 bprintf(bp, " flow table(%s", t);
1930                                 if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_u32))
1931                                         bprintf(bp, ",%u",
1932                                             ((ipfw_insn_u32 *)cmd)->d[0]);
1933                                 bprintf(bp, ")");
1934                                 break;
1935                             }
1936                         case O_IPID:
1937                                 if (F_LEN(cmd) == 1)
1938                                     bprintf(bp, " ipid %u", cmd->arg1 );
1939                                 else
1940                                     print_newports(bp, (ipfw_insn_u16 *)cmd, 0,
1941                                         O_IPID);
1942                                 break;
1943
1944                         case O_IPTTL:
1945                                 if (F_LEN(cmd) == 1)
1946                                     bprintf(bp, " ipttl %u", cmd->arg1 );
1947                                 else
1948                                     print_newports(bp, (ipfw_insn_u16 *)cmd, 0,
1949                                         O_IPTTL);
1950                                 break;
1951
1952                         case O_IPVER:
1953                                 bprintf(bp, " ipver %u", cmd->arg1 );
1954                                 break;
1955
1956                         case O_IPPRECEDENCE:
1957                                 bprintf(bp, " ipprecedence %u", cmd->arg1 >> 5);
1958                                 break;
1959
1960                         case O_DSCP:
1961                                 print_dscp(bp, (ipfw_insn_u32 *)cmd);
1962                                 break;
1963
1964                         case O_IPLEN:
1965                                 if (F_LEN(cmd) == 1)
1966                                     bprintf(bp, " iplen %u", cmd->arg1 );
1967                                 else
1968                                     print_newports(bp, (ipfw_insn_u16 *)cmd, 0,
1969                                         O_IPLEN);
1970                                 break;
1971
1972                         case O_IPOPT:
1973                                 print_flags(bp, "ipoptions", cmd, f_ipopts);
1974                                 break;
1975
1976                         case O_IPTOS:
1977                                 print_flags(bp, "iptos", cmd, f_iptos);
1978                                 break;
1979
1980                         case O_ICMPTYPE:
1981                                 print_icmptypes(bp, (ipfw_insn_u32 *)cmd);
1982                                 break;
1983
1984                         case O_ESTAB:
1985                                 bprintf(bp, " established");
1986                                 break;
1987
1988                         case O_TCPDATALEN:
1989                                 if (F_LEN(cmd) == 1)
1990                                     bprintf(bp, " tcpdatalen %u", cmd->arg1 );
1991                                 else
1992                                     print_newports(bp, (ipfw_insn_u16 *)cmd, 0,
1993                                         O_TCPDATALEN);
1994                                 break;
1995
1996                         case O_TCPFLAGS:
1997                                 print_flags(bp, "tcpflags", cmd, f_tcpflags);
1998                                 break;
1999
2000                         case O_TCPOPTS:
2001                                 print_flags(bp, "tcpoptions", cmd, f_tcpopts);
2002                                 break;
2003
2004                         case O_TCPWIN:
2005                                 if (F_LEN(cmd) == 1)
2006                                     bprintf(bp, " tcpwin %u", cmd->arg1);
2007                                 else
2008                                     print_newports(bp, (ipfw_insn_u16 *)cmd, 0,
2009                                         O_TCPWIN);
2010                                 break;
2011
2012                         case O_TCPACK:
2013                                 bprintf(bp, " tcpack %d", ntohl(cmd32->d[0]));
2014                                 break;
2015
2016                         case O_TCPSEQ:
2017                                 bprintf(bp, " tcpseq %d", ntohl(cmd32->d[0]));
2018                                 break;
2019
2020                         case O_UID:
2021                             {
2022                                 struct passwd *pwd = getpwuid(cmd32->d[0]);
2023
2024                                 if (pwd)
2025                                         bprintf(bp, " uid %s", pwd->pw_name);
2026                                 else
2027                                         bprintf(bp, " uid %u", cmd32->d[0]);
2028                             }
2029                                 break;
2030
2031                         case O_GID:
2032                             {
2033                                 struct group *grp = getgrgid(cmd32->d[0]);
2034
2035                                 if (grp)
2036                                         bprintf(bp, " gid %s", grp->gr_name);
2037                                 else
2038                                         bprintf(bp, " gid %u", cmd32->d[0]);
2039                             }
2040                                 break;
2041
2042                         case O_JAIL:
2043                                 bprintf(bp, " jail %d", cmd32->d[0]);
2044                                 break;
2045
2046                         case O_VERREVPATH:
2047                                 bprintf(bp, " verrevpath");
2048                                 break;
2049
2050                         case O_VERSRCREACH:
2051                                 bprintf(bp, " versrcreach");
2052                                 break;
2053
2054                         case O_ANTISPOOF:
2055                                 bprintf(bp, " antispoof");
2056                                 break;
2057
2058                         case O_IPSEC:
2059                                 bprintf(bp, " ipsec");
2060                                 break;
2061
2062                         case O_NOP:
2063                                 comment = (char *)(cmd + 1);
2064                                 break;
2065
2066                         case O_KEEP_STATE:
2067                                 bprintf(bp, " keep-state");
2068                                 break;
2069
2070                         case O_LIMIT: {
2071                                 struct _s_x *p = limit_masks;
2072                                 ipfw_insn_limit *c = (ipfw_insn_limit *)cmd;
2073                                 uint8_t x = c->limit_mask;
2074                                 char const *comma = " ";
2075
2076                                 bprintf(bp, " limit");
2077                                 for (; p->x != 0 ; p++)
2078                                         if ((x & p->x) == p->x) {
2079                                                 x &= ~p->x;
2080                                                 bprintf(bp, "%s%s", comma,p->s);
2081                                                 comma = ",";
2082                                         }
2083                                 bprint_uint_arg(bp, " ", c->conn_limit);
2084                                 break;
2085                         }
2086
2087                         case O_IP6:
2088                                 bprintf(bp, " ip6");
2089                                 break;
2090
2091                         case O_IP4:
2092                                 bprintf(bp, " ip4");
2093                                 break;
2094
2095                         case O_ICMP6TYPE:
2096                                 print_icmp6types(bp, (ipfw_insn_u32 *)cmd);
2097                                 break;
2098
2099                         case O_EXT_HDR:
2100                                 print_ext6hdr(bp, (ipfw_insn *)cmd);
2101                                 break;
2102
2103                         case O_TAGGED:
2104                                 if (F_LEN(cmd) == 1)
2105                                         bprint_uint_arg(bp, " tagged ",
2106                                             cmd->arg1);
2107                                 else
2108                                         print_newports(bp, (ipfw_insn_u16 *)cmd,
2109                                             0, O_TAGGED);
2110                                 break;
2111
2112                         default:
2113                                 bprintf(bp, " [opcode %d len %d]",
2114                                     cmd->opcode, cmd->len);
2115                         }
2116                 }
2117                 if (cmd->len & F_OR) {
2118                         bprintf(bp, " or");
2119                         or_block = 1;
2120                 } else if (or_block) {
2121                         bprintf(bp, " }");
2122                         or_block = 0;
2123                 }
2124         }
2125         show_prerequisites(bp, &flags, HAVE_PROTO | HAVE_SRCIP | HAVE_DSTIP
2126                                               | HAVE_IP, 0);
2127         if (comment)
2128                 bprintf(bp, " // %s", comment);
2129         bprintf(bp, "\n");
2130 }
2131
2132 static void
2133 show_dyn_state(struct cmdline_opts *co, struct format_opts *fo,
2134     struct buf_pr *bp, ipfw_dyn_rule *d)
2135 {
2136         struct protoent *pe;
2137         struct in_addr a;
2138         uint16_t rulenum;
2139         char buf[INET6_ADDRSTRLEN];
2140
2141         if (!co->do_expired) {
2142                 if (!d->expire && !(d->dyn_type == O_LIMIT_PARENT))
2143                         return;
2144         }
2145         bcopy(&d->rule, &rulenum, sizeof(rulenum));
2146         bprintf(bp, "%05d", rulenum);
2147         if (fo->pcwidth > 0 || fo->bcwidth > 0) {
2148                 bprintf(bp, " ");
2149                 pr_u64(bp, &d->pcnt, fo->pcwidth);
2150                 pr_u64(bp, &d->bcnt, fo->bcwidth);
2151                 bprintf(bp, "(%ds)", d->expire);
2152         }
2153         switch (d->dyn_type) {
2154         case O_LIMIT_PARENT:
2155                 bprintf(bp, " PARENT %d", d->count);
2156                 break;
2157         case O_LIMIT:
2158                 bprintf(bp, " LIMIT");
2159                 break;
2160         case O_KEEP_STATE: /* bidir, no mask */
2161                 bprintf(bp, " STATE");
2162                 break;
2163         }
2164
2165         if ((pe = getprotobynumber(d->id.proto)) != NULL)
2166                 bprintf(bp, " %s", pe->p_name);
2167         else
2168                 bprintf(bp, " proto %u", d->id.proto);
2169
2170         if (d->id.addr_type == 4) {
2171                 a.s_addr = htonl(d->id.src_ip);
2172                 bprintf(bp, " %s %d", inet_ntoa(a), d->id.src_port);
2173
2174                 a.s_addr = htonl(d->id.dst_ip);
2175                 bprintf(bp, " <-> %s %d", inet_ntoa(a), d->id.dst_port);
2176         } else if (d->id.addr_type == 6) {
2177                 bprintf(bp, " %s %d", inet_ntop(AF_INET6, &d->id.src_ip6, buf,
2178                     sizeof(buf)), d->id.src_port);
2179                 bprintf(bp, " <-> %s %d", inet_ntop(AF_INET6, &d->id.dst_ip6,
2180                     buf, sizeof(buf)), d->id.dst_port);
2181         } else
2182                 bprintf(bp, " UNKNOWN <-> UNKNOWN\n");
2183 }
2184
2185 static int
2186 do_range_cmd(int cmd, ipfw_range_tlv *rt)
2187 {
2188         ipfw_range_header rh;
2189         size_t sz;
2190
2191         memset(&rh, 0, sizeof(rh));
2192         memcpy(&rh.range, rt, sizeof(*rt));
2193         rh.range.head.length = sizeof(*rt);
2194         rh.range.head.type = IPFW_TLV_RANGE;
2195         sz = sizeof(rh);
2196
2197         if (do_get3(cmd, &rh.opheader, &sz) != 0)
2198                 return (-1);
2199         /* Save number of matched objects */
2200         rt->new_set = rh.range.new_set;
2201         return (0);
2202 }
2203
2204 /*
2205  * This one handles all set-related commands
2206  *      ipfw set { show | enable | disable }
2207  *      ipfw set swap X Y
2208  *      ipfw set move X to Y
2209  *      ipfw set move rule X to Y
2210  */
2211 void
2212 ipfw_sets_handler(char *av[])
2213 {
2214         uint32_t masks[2];
2215         int i;
2216         uint8_t cmd, rulenum;
2217         ipfw_range_tlv rt;
2218         char *msg;
2219         size_t size;
2220
2221         av++;
2222         memset(&rt, 0, sizeof(rt));
2223
2224         if (av[0] == NULL)
2225                 errx(EX_USAGE, "set needs command");
2226         if (_substrcmp(*av, "show") == 0) {
2227                 struct format_opts fo;
2228                 ipfw_cfg_lheader *cfg;
2229
2230                 memset(&fo, 0, sizeof(fo));
2231                 if (ipfw_get_config(&co, &fo, &cfg, &size) != 0)
2232                         err(EX_OSERR, "requesting config failed");
2233
2234                 for (i = 0, msg = "disable"; i < RESVD_SET; i++)
2235                         if ((cfg->set_mask & (1<<i)) == 0) {
2236                                 printf("%s %d", msg, i);
2237                                 msg = "";
2238                         }
2239                 msg = (cfg->set_mask != (uint32_t)-1) ? " enable" : "enable";
2240                 for (i = 0; i < RESVD_SET; i++)
2241                         if ((cfg->set_mask & (1<<i)) != 0) {
2242                                 printf("%s %d", msg, i);
2243                                 msg = "";
2244                         }
2245                 printf("\n");
2246                 free(cfg);
2247         } else if (_substrcmp(*av, "swap") == 0) {
2248                 av++;
2249                 if ( av[0] == NULL || av[1] == NULL )
2250                         errx(EX_USAGE, "set swap needs 2 set numbers\n");
2251                 rt.set = atoi(av[0]);
2252                 rt.new_set = atoi(av[1]);
2253                 if (!isdigit(*(av[0])) || rt.set > RESVD_SET)
2254                         errx(EX_DATAERR, "invalid set number %s\n", av[0]);
2255                 if (!isdigit(*(av[1])) || rt.new_set > RESVD_SET)
2256                         errx(EX_DATAERR, "invalid set number %s\n", av[1]);
2257                 i = do_range_cmd(IP_FW_SET_SWAP, &rt);
2258         } else if (_substrcmp(*av, "move") == 0) {
2259                 av++;
2260                 if (av[0] && _substrcmp(*av, "rule") == 0) {
2261                         rt.flags = IPFW_RCFLAG_RANGE; /* move rules to new set */
2262                         cmd = IP_FW_XMOVE;
2263                         av++;
2264                 } else
2265                         cmd = IP_FW_SET_MOVE; /* Move set to new one */
2266                 if (av[0] == NULL || av[1] == NULL || av[2] == NULL ||
2267                                 av[3] != NULL ||  _substrcmp(av[1], "to") != 0)
2268                         errx(EX_USAGE, "syntax: set move [rule] X to Y\n");
2269                 rulenum = atoi(av[0]);
2270                 rt.new_set = atoi(av[2]);
2271                 if (cmd == IP_FW_XMOVE) {
2272                         rt.start_rule = rulenum;
2273                         rt.end_rule = rulenum;
2274                 } else
2275                         rt.set = rulenum;
2276                 rt.new_set = atoi(av[2]);
2277                 if (!isdigit(*(av[0])) || (cmd == 3 && rt.set > RESVD_SET) ||
2278                         (cmd == 2 && rt.start_rule == IPFW_DEFAULT_RULE) )
2279                         errx(EX_DATAERR, "invalid source number %s\n", av[0]);
2280                 if (!isdigit(*(av[2])) || rt.new_set > RESVD_SET)
2281                         errx(EX_DATAERR, "invalid dest. set %s\n", av[1]);
2282                 i = do_range_cmd(cmd, &rt);
2283                 if (i < 0)
2284                         err(EX_OSERR, "failed to move %s",
2285                             cmd == IP_FW_SET_MOVE ? "set": "rule");
2286         } else if (_substrcmp(*av, "disable") == 0 ||
2287                    _substrcmp(*av, "enable") == 0 ) {
2288                 int which = _substrcmp(*av, "enable") == 0 ? 1 : 0;
2289
2290                 av++;
2291                 masks[0] = masks[1] = 0;
2292
2293                 while (av[0]) {
2294                         if (isdigit(**av)) {
2295                                 i = atoi(*av);
2296                                 if (i < 0 || i > RESVD_SET)
2297                                         errx(EX_DATAERR,
2298                                             "invalid set number %d\n", i);
2299                                 masks[which] |= (1<<i);
2300                         } else if (_substrcmp(*av, "disable") == 0)
2301                                 which = 0;
2302                         else if (_substrcmp(*av, "enable") == 0)
2303                                 which = 1;
2304                         else
2305                                 errx(EX_DATAERR,
2306                                         "invalid set command %s\n", *av);
2307                         av++;
2308                 }
2309                 if ( (masks[0] & masks[1]) != 0 )
2310                         errx(EX_DATAERR,
2311                             "cannot enable and disable the same set\n");
2312
2313                 rt.set = masks[0];
2314                 rt.new_set = masks[1];
2315                 i = do_range_cmd(IP_FW_SET_ENABLE, &rt);
2316                 if (i)
2317                         warn("set enable/disable: setsockopt(IP_FW_SET_ENABLE)");
2318         } else
2319                 errx(EX_USAGE, "invalid set command %s\n", *av);
2320 }
2321
2322 void
2323 ipfw_sysctl_handler(char *av[], int which)
2324 {
2325         av++;
2326
2327         if (av[0] == NULL) {
2328                 warnx("missing keyword to enable/disable\n");
2329         } else if (_substrcmp(*av, "firewall") == 0) {
2330                 sysctlbyname("net.inet.ip.fw.enable", NULL, 0,
2331                     &which, sizeof(which));
2332                 sysctlbyname("net.inet6.ip6.fw.enable", NULL, 0,
2333                     &which, sizeof(which));
2334         } else if (_substrcmp(*av, "one_pass") == 0) {
2335                 sysctlbyname("net.inet.ip.fw.one_pass", NULL, 0,
2336                     &which, sizeof(which));
2337         } else if (_substrcmp(*av, "debug") == 0) {
2338                 sysctlbyname("net.inet.ip.fw.debug", NULL, 0,
2339                     &which, sizeof(which));
2340         } else if (_substrcmp(*av, "verbose") == 0) {
2341                 sysctlbyname("net.inet.ip.fw.verbose", NULL, 0,
2342                     &which, sizeof(which));
2343         } else if (_substrcmp(*av, "dyn_keepalive") == 0) {
2344                 sysctlbyname("net.inet.ip.fw.dyn_keepalive", NULL, 0,
2345                     &which, sizeof(which));
2346 #ifndef NO_ALTQ
2347         } else if (_substrcmp(*av, "altq") == 0) {
2348                 altq_set_enabled(which);
2349 #endif
2350         } else {
2351                 warnx("unrecognize enable/disable keyword: %s\n", *av);
2352         }
2353 }
2354
2355 typedef void state_cb(struct cmdline_opts *co, struct format_opts *fo,
2356     void *arg, void *state);
2357
2358 static void
2359 prepare_format_dyn(struct cmdline_opts *co, struct format_opts *fo,
2360     void *arg, void *_state)
2361 {
2362         ipfw_dyn_rule *d;
2363         int width;
2364         uint8_t set;
2365
2366         d = (ipfw_dyn_rule *)_state;
2367         /* Count _ALL_ states */
2368         fo->dcnt++;
2369
2370         if (fo->show_counters == 0)
2371                 return;
2372
2373         if (co->use_set) {
2374                 /* skip states from another set */
2375                 bcopy((char *)&d->rule + sizeof(uint16_t), &set,
2376                     sizeof(uint8_t));
2377                 if (set != co->use_set - 1)
2378                         return;
2379         }
2380
2381         width = pr_u64(NULL, &d->pcnt, 0);
2382         if (width > fo->pcwidth)
2383                 fo->pcwidth = width;
2384
2385         width = pr_u64(NULL, &d->bcnt, 0);
2386         if (width > fo->bcwidth)
2387                 fo->bcwidth = width;
2388 }
2389
2390 static int
2391 foreach_state(struct cmdline_opts *co, struct format_opts *fo,
2392     caddr_t base, size_t sz, state_cb dyn_bc, void *dyn_arg)
2393 {
2394         int ttype;
2395         state_cb *fptr;
2396         void *farg;
2397         ipfw_obj_tlv *tlv;
2398         ipfw_obj_ctlv *ctlv;
2399
2400         fptr = NULL;
2401         ttype = 0;
2402
2403         while (sz > 0) {
2404                 ctlv = (ipfw_obj_ctlv *)base;
2405                 switch (ctlv->head.type) {
2406                 case IPFW_TLV_DYNSTATE_LIST:
2407                         base += sizeof(*ctlv);
2408                         sz -= sizeof(*ctlv);
2409                         ttype = IPFW_TLV_DYN_ENT;
2410                         fptr = dyn_bc;
2411                         farg = dyn_arg;
2412                         break;
2413                 default:
2414                         return (sz);
2415                 }
2416
2417                 while (sz > 0) {
2418                         tlv = (ipfw_obj_tlv *)base;
2419                         if (tlv->type != ttype)
2420                                 break;
2421
2422                         fptr(co, fo, farg, tlv + 1);
2423                         sz -= tlv->length;
2424                         base += tlv->length;
2425                 }
2426         }
2427
2428         return (sz);
2429 }
2430
2431 static void
2432 prepare_format_opts(struct cmdline_opts *co, struct format_opts *fo,
2433     ipfw_obj_tlv *rtlv, int rcnt, caddr_t dynbase, size_t dynsz)
2434 {
2435         int bcwidth, pcwidth, width;
2436         int n;
2437         struct ip_fw_bcounter *cntr;
2438         struct ip_fw_rule *r;
2439
2440         bcwidth = 0;
2441         pcwidth = 0;
2442         if (fo->show_counters != 0) {
2443                 for (n = 0; n < rcnt; n++,
2444                     rtlv = (ipfw_obj_tlv *)((caddr_t)rtlv + rtlv->length)) {
2445                         cntr = (struct ip_fw_bcounter *)(rtlv + 1);
2446                         r = (struct ip_fw_rule *)((caddr_t)cntr + cntr->size);
2447                         /* skip rules from another set */
2448                         if (co->use_set && r->set != co->use_set - 1)
2449                                 continue;
2450
2451                         /* packet counter */
2452                         width = pr_u64(NULL, &cntr->pcnt, 0);
2453                         if (width > pcwidth)
2454                                 pcwidth = width;
2455
2456                         /* byte counter */
2457                         width = pr_u64(NULL, &cntr->bcnt, 0);
2458                         if (width > bcwidth)
2459                                 bcwidth = width;
2460                 }
2461         }
2462         fo->bcwidth = bcwidth;
2463         fo->pcwidth = pcwidth;
2464
2465         fo->dcnt = 0;
2466         if (co->do_dynamic && dynsz > 0)
2467                 foreach_state(co, fo, dynbase, dynsz, prepare_format_dyn, NULL);
2468 }
2469
2470 static int
2471 list_static_range(struct cmdline_opts *co, struct format_opts *fo,
2472     struct buf_pr *bp, ipfw_obj_tlv *rtlv, int rcnt)
2473 {
2474         int n, seen;
2475         struct ip_fw_rule *r;
2476         struct ip_fw_bcounter *cntr;
2477         int c = 0;
2478
2479         for (n = seen = 0; n < rcnt; n++,
2480             rtlv = (ipfw_obj_tlv *)((caddr_t)rtlv + rtlv->length)) {
2481
2482                 if ((fo->show_counters | fo->show_time) != 0) {
2483                         cntr = (struct ip_fw_bcounter *)(rtlv + 1);
2484                         r = (struct ip_fw_rule *)((caddr_t)cntr + cntr->size);
2485                 } else {
2486                         cntr = NULL;
2487                         r = (struct ip_fw_rule *)(rtlv + 1);
2488                 }
2489                 if (r->rulenum > fo->last)
2490                         break;
2491                 if (co->use_set && r->set != co->use_set - 1)
2492                         continue;
2493                 if (r->rulenum >= fo->first && r->rulenum <= fo->last) {
2494                         show_static_rule(co, fo, bp, r, cntr);
2495                         printf("%s", bp->buf);
2496                         c += rtlv->length;
2497                         bp_flush(bp);
2498                         seen++;
2499                 }
2500         }
2501
2502         return (seen);
2503 }
2504
2505 static void
2506 list_dyn_state(struct cmdline_opts *co, struct format_opts *fo,
2507     void *_arg, void *_state)
2508 {
2509         uint16_t rulenum;
2510         uint8_t set;
2511         ipfw_dyn_rule *d;
2512         struct buf_pr *bp;
2513
2514         d = (ipfw_dyn_rule *)_state;
2515         bp = (struct buf_pr *)_arg;
2516
2517         bcopy(&d->rule, &rulenum, sizeof(rulenum));
2518         if (rulenum > fo->last)
2519                 return;
2520         if (co->use_set) {
2521                 bcopy((char *)&d->rule + sizeof(uint16_t),
2522                       &set, sizeof(uint8_t));
2523                 if (set != co->use_set - 1)
2524                         return;
2525         }
2526         if (rulenum >= fo->first) {
2527                 show_dyn_state(co, fo, bp, d);
2528                 printf("%s\n", bp->buf);
2529                 bp_flush(bp);
2530         }
2531 }
2532
2533 static int
2534 list_dyn_range(struct cmdline_opts *co, struct format_opts *fo,
2535     struct buf_pr *bp, caddr_t base, size_t sz)
2536 {
2537
2538         sz = foreach_state(co, fo, base, sz, list_dyn_state, bp);
2539         return (sz);
2540 }
2541
2542 void
2543 ipfw_list(int ac, char *av[], int show_counters)
2544 {
2545         ipfw_cfg_lheader *cfg;
2546         struct format_opts sfo;
2547         size_t sz;
2548         int error;
2549         int lac;
2550         char **lav;
2551         uint32_t rnum;
2552         char *endptr;
2553
2554         if (co.test_only) {
2555                 fprintf(stderr, "Testing only, list disabled\n");
2556                 return;
2557         }
2558         if (co.do_pipe) {
2559                 dummynet_list(ac, av, show_counters);
2560                 return;
2561         }
2562
2563         ac--;
2564         av++;
2565         memset(&sfo, 0, sizeof(sfo));
2566
2567         /* Determine rule range to request */
2568         if (ac > 0) {
2569                 for (lac = ac, lav = av; lac != 0; lac--) {
2570                         rnum = strtoul(*lav++, &endptr, 10);
2571                         if (sfo.first == 0 || rnum < sfo.first)
2572                                 sfo.first = rnum;
2573
2574                         if (*endptr == '-')
2575                                 rnum = strtoul(endptr + 1, &endptr, 10);
2576                         if (sfo.last == 0 || rnum > sfo.last)
2577                                 sfo.last = rnum;
2578                 }
2579         }
2580
2581         /* get configuraion from kernel */
2582         cfg = NULL;
2583         sfo.show_counters = show_counters;
2584         sfo.show_time = co.do_time;
2585         sfo.flags = IPFW_CFG_GET_STATIC;
2586         if (co.do_dynamic != 0)
2587                 sfo.flags |= IPFW_CFG_GET_STATES;
2588         if ((sfo.show_counters | sfo.show_time) != 0)
2589                 sfo.flags |= IPFW_CFG_GET_COUNTERS;
2590         if (ipfw_get_config(&co, &sfo, &cfg, &sz) != 0)
2591                 err(EX_OSERR, "retrieving config failed");
2592
2593         error = ipfw_show_config(&co, &sfo, cfg, sz, ac, av);
2594
2595         free(cfg);
2596
2597         if (error != EX_OK)
2598                 exit(error);
2599 }
2600
2601 static int
2602 ipfw_show_config(struct cmdline_opts *co, struct format_opts *fo,
2603     ipfw_cfg_lheader *cfg, size_t sz, int ac, char *av[])
2604 {
2605         caddr_t dynbase;
2606         size_t dynsz;
2607         int rcnt;
2608         int exitval = EX_OK;
2609         int lac;
2610         char **lav;
2611         char *endptr;
2612         size_t readsz;
2613         struct buf_pr bp;
2614         ipfw_obj_ctlv *ctlv, *tstate;
2615         ipfw_obj_tlv *rbase;
2616
2617         /*
2618          * Handle tablenames TLV first, if any
2619          */
2620         tstate = NULL;
2621         rbase = NULL;
2622         dynbase = NULL;
2623         dynsz = 0;
2624         readsz = sizeof(*cfg);
2625         rcnt = 0;
2626
2627         fo->set_mask = cfg->set_mask;
2628
2629         ctlv = (ipfw_obj_ctlv *)(cfg + 1);
2630
2631         if (cfg->flags & IPFW_CFG_GET_STATIC) {
2632                 /* We've requested static rules */
2633                 if (ctlv->head.type == IPFW_TLV_TBLNAME_LIST) {
2634                         object_sort_ctlv(ctlv);
2635                         fo->tstate = ctlv;
2636                         readsz += ctlv->head.length;
2637                         ctlv = (ipfw_obj_ctlv *)((caddr_t)ctlv +
2638                             ctlv->head.length);
2639                 }
2640
2641                 if (ctlv->head.type == IPFW_TLV_RULE_LIST) {
2642                         rbase = (ipfw_obj_tlv *)(ctlv + 1);
2643                         rcnt = ctlv->count;
2644                         readsz += ctlv->head.length;
2645                         ctlv = (ipfw_obj_ctlv *)((caddr_t)ctlv +
2646                             ctlv->head.length);
2647                 }
2648         }
2649
2650         if ((cfg->flags & IPFW_CFG_GET_STATES) && (readsz != sz))  {
2651                 /* We may have some dynamic states */
2652                 dynsz = sz - readsz;
2653                 /* Skip empty header */
2654                 if (dynsz != sizeof(ipfw_obj_ctlv))
2655                         dynbase = (caddr_t)ctlv;
2656                 else
2657                         dynsz = 0;
2658         }
2659
2660         prepare_format_opts(co, fo, rbase, rcnt, dynbase, dynsz);
2661         bp_alloc(&bp, 4096);
2662
2663         /* if no rule numbers were specified, list all rules */
2664         if (ac == 0) {
2665                 fo->first = 0;
2666                 fo->last = IPFW_DEFAULT_RULE;
2667                 list_static_range(co, fo, &bp, rbase, rcnt);
2668
2669                 if (co->do_dynamic && dynsz > 0) {
2670                         printf("## Dynamic rules (%d %zu):\n", fo->dcnt, dynsz);
2671                         list_dyn_range(co, fo, &bp, dynbase, dynsz);
2672                 }
2673
2674                 bp_free(&bp);
2675                 return (EX_OK);
2676         }
2677
2678         /* display specific rules requested on command line */
2679         for (lac = ac, lav = av; lac != 0; lac--) {
2680                 /* convert command line rule # */
2681                 fo->last = fo->first = strtoul(*lav++, &endptr, 10);
2682                 if (*endptr == '-')
2683                         fo->last = strtoul(endptr + 1, &endptr, 10);
2684                 if (*endptr) {
2685                         exitval = EX_USAGE;
2686                         warnx("invalid rule number: %s", *(lav - 1));
2687                         continue;
2688                 }
2689
2690                 if (list_static_range(co, fo, &bp, rbase, rcnt) == 0) {
2691                         /* give precedence to other error(s) */
2692                         if (exitval == EX_OK)
2693                                 exitval = EX_UNAVAILABLE;
2694                         if (fo->first == fo->last)
2695                                 warnx("rule %u does not exist", fo->first);
2696                         else
2697                                 warnx("no rules in range %u-%u",
2698                                     fo->first, fo->last);
2699                 }
2700         }
2701
2702         if (co->do_dynamic && dynsz > 0) {
2703                 printf("## Dynamic rules:\n");
2704                 for (lac = ac, lav = av; lac != 0; lac--) {
2705                         fo->last = fo->first = strtoul(*lav++, &endptr, 10);
2706                         if (*endptr == '-')
2707                                 fo->last = strtoul(endptr+1, &endptr, 10);
2708                         if (*endptr)
2709                                 /* already warned */
2710                                 continue;
2711                         list_dyn_range(co, fo, &bp, dynbase, dynsz);
2712                 }
2713         }
2714
2715         bp_free(&bp);
2716         return (exitval);
2717 }
2718
2719
2720 /*
2721  * Retrieves current ipfw configuration of given type
2722  * and stores its pointer to @pcfg.
2723  *
2724  * Caller is responsible for freeing @pcfg.
2725  *
2726  * Returns 0 on success.
2727  */
2728
2729 static int
2730 ipfw_get_config(struct cmdline_opts *co, struct format_opts *fo,
2731     ipfw_cfg_lheader **pcfg, size_t *psize)
2732 {
2733         ipfw_cfg_lheader *cfg;
2734         size_t sz;
2735         int i;
2736
2737
2738         if (co->test_only != 0) {
2739                 fprintf(stderr, "Testing only, list disabled\n");
2740                 return (0);
2741         }
2742
2743         /* Start with some data size */
2744         sz = 4096;
2745         cfg = NULL;
2746
2747         for (i = 0; i < 16; i++) {
2748                 if (cfg != NULL)
2749                         free(cfg);
2750                 if ((cfg = calloc(1, sz)) == NULL)
2751                         return (ENOMEM);
2752
2753                 cfg->flags = fo->flags;
2754                 cfg->start_rule = fo->first;
2755                 cfg->end_rule = fo->last;
2756
2757                 if (do_get3(IP_FW_XGET, &cfg->opheader, &sz) != 0) {
2758                         if (errno != ENOMEM) {
2759                                 free(cfg);
2760                                 return (errno);
2761                         }
2762
2763                         /* Buffer size is not enough. Try to increase */
2764                         sz = sz * 2;
2765                         if (sz < cfg->size)
2766                                 sz = cfg->size;
2767                         continue;
2768                 }
2769
2770                 *pcfg = cfg;
2771                 *psize = sz;
2772                 return (0);
2773         }
2774
2775         free(cfg);
2776         return (ENOMEM);
2777 }
2778
2779 static int
2780 lookup_host (char *host, struct in_addr *ipaddr)
2781 {
2782         struct hostent *he;
2783
2784         if (!inet_aton(host, ipaddr)) {
2785                 if ((he = gethostbyname(host)) == NULL)
2786                         return(-1);
2787                 *ipaddr = *(struct in_addr *)he->h_addr_list[0];
2788         }
2789         return(0);
2790 }
2791
2792 struct tidx {
2793         ipfw_obj_ntlv *idx;
2794         uint32_t count;
2795         uint32_t size;
2796         uint16_t counter;
2797         uint8_t set;
2798 };
2799
2800 int
2801 ipfw_check_object_name(const char *name)
2802 {
2803         int c, i, l;
2804
2805         /*
2806          * Check that name is null-terminated and contains
2807          * valid symbols only. Valid mask is:
2808          * [a-zA-Z0-9\-_\.]{1,63}
2809          */
2810         l = strlen(name);
2811         if (l == 0 || l >= 64)
2812                 return (EINVAL);
2813         for (i = 0; i < l; i++) {
2814                 c = name[i];
2815                 if (isalpha(c) || isdigit(c) || c == '_' ||
2816                     c == '-' || c == '.')
2817                         continue;
2818                 return (EINVAL);
2819         }
2820         return (0);
2821 }
2822
2823 static int
2824 eaction_check_name(const char *name)
2825 {
2826
2827         if (ipfw_check_object_name(name) != 0)
2828                 return (EINVAL);
2829         /* Restrict some 'special' names */
2830         if (match_token(rule_actions, name) != -1 &&
2831             match_token(rule_action_params, name) != -1)
2832                 return (EINVAL);
2833         return (0);
2834 }
2835
2836 static uint16_t
2837 pack_object(struct tidx *tstate, char *name, int otype)
2838 {
2839         int i;
2840         ipfw_obj_ntlv *ntlv;
2841
2842         for (i = 0; i < tstate->count; i++) {
2843                 if (strcmp(tstate->idx[i].name, name) != 0)
2844                         continue;
2845                 if (tstate->idx[i].set != tstate->set)
2846                         continue;
2847                 if (tstate->idx[i].head.type != otype)
2848                         continue;
2849
2850                 return (tstate->idx[i].idx);
2851         }
2852
2853         if (tstate->count + 1 > tstate->size) {
2854                 tstate->size += 4;
2855                 tstate->idx = realloc(tstate->idx, tstate->size *
2856                     sizeof(ipfw_obj_ntlv));
2857                 if (tstate->idx == NULL)
2858                         return (0);
2859         }
2860
2861         ntlv = &tstate->idx[i];
2862         memset(ntlv, 0, sizeof(ipfw_obj_ntlv));
2863         strlcpy(ntlv->name, name, sizeof(ntlv->name));
2864         ntlv->head.type = otype;
2865         ntlv->head.length = sizeof(ipfw_obj_ntlv);
2866         ntlv->set = tstate->set;
2867         ntlv->idx = ++tstate->counter;
2868         tstate->count++;
2869
2870         return (ntlv->idx);
2871 }
2872
2873 static uint16_t
2874 pack_table(struct tidx *tstate, char *name)
2875 {
2876
2877         if (table_check_name(name) != 0)
2878                 return (0);
2879
2880         return (pack_object(tstate, name, IPFW_TLV_TBL_NAME));
2881 }
2882
2883 static void
2884 fill_table(ipfw_insn *cmd, char *av, uint8_t opcode, struct tidx *tstate)
2885 {
2886         uint32_t *d = ((ipfw_insn_u32 *)cmd)->d;
2887         uint16_t uidx;
2888         char *p;
2889
2890         if ((p = strchr(av + 6, ')')) == NULL)
2891                 errx(EX_DATAERR, "forgotten parenthesis: '%s'", av);
2892         *p = '\0';
2893         p = strchr(av + 6, ',');
2894         if (p)
2895                 *p++ = '\0';
2896
2897         if ((uidx = pack_table(tstate, av + 6)) == 0)
2898                 errx(EX_DATAERR, "Invalid table name: %s", av + 6);
2899
2900         cmd->opcode = opcode;
2901         cmd->arg1 = uidx;
2902         if (p) {
2903                 cmd->len |= F_INSN_SIZE(ipfw_insn_u32);
2904                 d[0] = strtoul(p, NULL, 0);
2905         } else
2906                 cmd->len |= F_INSN_SIZE(ipfw_insn);
2907 }
2908
2909
2910 /*
2911  * fills the addr and mask fields in the instruction as appropriate from av.
2912  * Update length as appropriate.
2913  * The following formats are allowed:
2914  *      me      returns O_IP_*_ME
2915  *      1.2.3.4         single IP address
2916  *      1.2.3.4:5.6.7.8 address:mask
2917  *      1.2.3.4/24      address/mask
2918  *      1.2.3.4/26{1,6,5,4,23}  set of addresses in a subnet
2919  * We can have multiple comma-separated address/mask entries.
2920  */
2921 static void
2922 fill_ip(ipfw_insn_ip *cmd, char *av, int cblen, struct tidx *tstate)
2923 {
2924         int len = 0;
2925         uint32_t *d = ((ipfw_insn_u32 *)cmd)->d;
2926
2927         cmd->o.len &= ~F_LEN_MASK;      /* zero len */
2928
2929         if (_substrcmp(av, "any") == 0)
2930                 return;
2931
2932         if (_substrcmp(av, "me") == 0) {
2933                 cmd->o.len |= F_INSN_SIZE(ipfw_insn);
2934                 return;
2935         }
2936
2937         if (strncmp(av, "table(", 6) == 0) {
2938                 fill_table(&cmd->o, av, O_IP_DST_LOOKUP, tstate);
2939                 return;
2940         }
2941
2942     while (av) {
2943         /*
2944          * After the address we can have '/' or ':' indicating a mask,
2945          * ',' indicating another address follows, '{' indicating a
2946          * set of addresses of unspecified size.
2947          */
2948         char *t = NULL, *p = strpbrk(av, "/:,{");
2949         int masklen;
2950         char md, nd = '\0';
2951
2952         CHECK_LENGTH(cblen, F_INSN_SIZE(ipfw_insn) + 2 + len);
2953
2954         if (p) {
2955                 md = *p;
2956                 *p++ = '\0';
2957                 if ((t = strpbrk(p, ",{")) != NULL) {
2958                         nd = *t;
2959                         *t = '\0';
2960                 }
2961         } else
2962                 md = '\0';
2963
2964         if (lookup_host(av, (struct in_addr *)&d[0]) != 0)
2965                 errx(EX_NOHOST, "hostname ``%s'' unknown", av);
2966         switch (md) {
2967         case ':':
2968                 if (!inet_aton(p, (struct in_addr *)&d[1]))
2969                         errx(EX_DATAERR, "bad netmask ``%s''", p);
2970                 break;
2971         case '/':
2972                 masklen = atoi(p);
2973                 if (masklen == 0)
2974                         d[1] = htonl(0U);       /* mask */
2975                 else if (masklen > 32)
2976                         errx(EX_DATAERR, "bad width ``%s''", p);
2977                 else
2978                         d[1] = htonl(~0U << (32 - masklen));
2979                 break;
2980         case '{':       /* no mask, assume /24 and put back the '{' */
2981                 d[1] = htonl(~0U << (32 - 24));
2982                 *(--p) = md;
2983                 break;
2984
2985         case ',':       /* single address plus continuation */
2986                 *(--p) = md;
2987                 /* FALLTHROUGH */
2988         case 0:         /* initialization value */
2989         default:
2990                 d[1] = htonl(~0U);      /* force /32 */
2991                 break;
2992         }
2993         d[0] &= d[1];           /* mask base address with mask */
2994         if (t)
2995                 *t = nd;
2996         /* find next separator */
2997         if (p)
2998                 p = strpbrk(p, ",{");
2999         if (p && *p == '{') {
3000                 /*
3001                  * We have a set of addresses. They are stored as follows:
3002                  *   arg1       is the set size (powers of 2, 2..256)
3003                  *   addr       is the base address IN HOST FORMAT
3004                  *   mask..     is an array of arg1 bits (rounded up to
3005                  *              the next multiple of 32) with bits set
3006                  *              for each host in the map.
3007                  */
3008                 uint32_t *map = (uint32_t *)&cmd->mask;
3009                 int low, high;
3010                 int i = contigmask((uint8_t *)&(d[1]), 32);
3011
3012                 if (len > 0)
3013                         errx(EX_DATAERR, "address set cannot be in a list");
3014                 if (i < 24 || i > 31)
3015                         errx(EX_DATAERR, "invalid set with mask %d\n", i);
3016                 cmd->o.arg1 = 1<<(32-i);        /* map length           */
3017                 d[0] = ntohl(d[0]);             /* base addr in host format */
3018                 cmd->o.opcode = O_IP_DST_SET;   /* default */
3019                 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32) + (cmd->o.arg1+31)/32;
3020                 for (i = 0; i < (cmd->o.arg1+31)/32 ; i++)
3021                         map[i] = 0;     /* clear map */
3022
3023                 av = p + 1;
3024                 low = d[0] & 0xff;
3025                 high = low + cmd->o.arg1 - 1;
3026                 /*
3027                  * Here, i stores the previous value when we specify a range
3028                  * of addresses within a mask, e.g. 45-63. i = -1 means we
3029                  * have no previous value.
3030                  */
3031                 i = -1; /* previous value in a range */
3032                 while (isdigit(*av)) {
3033                         char *s;
3034                         int a = strtol(av, &s, 0);
3035
3036                         if (s == av) { /* no parameter */
3037                             if (*av != '}')
3038                                 errx(EX_DATAERR, "set not closed\n");
3039                             if (i != -1)
3040                                 errx(EX_DATAERR, "incomplete range %d-", i);
3041                             break;
3042                         }
3043                         if (a < low || a > high)
3044                             errx(EX_DATAERR, "addr %d out of range [%d-%d]\n",
3045                                 a, low, high);
3046                         a -= low;
3047                         if (i == -1)    /* no previous in range */
3048                             i = a;
3049                         else {          /* check that range is valid */
3050                             if (i > a)
3051                                 errx(EX_DATAERR, "invalid range %d-%d",
3052                                         i+low, a+low);
3053                             if (*s == '-')
3054                                 errx(EX_DATAERR, "double '-' in range");
3055                         }
3056                         for (; i <= a; i++)
3057                             map[i/32] |= 1<<(i & 31);
3058                         i = -1;
3059                         if (*s == '-')
3060                             i = a;
3061                         else if (*s == '}')
3062                             break;
3063                         av = s+1;
3064                 }
3065                 return;
3066         }
3067         av = p;
3068         if (av)                 /* then *av must be a ',' */
3069                 av++;
3070
3071         /* Check this entry */
3072         if (d[1] == 0) { /* "any", specified as x.x.x.x/0 */
3073                 /*
3074                  * 'any' turns the entire list into a NOP.
3075                  * 'not any' never matches, so it is removed from the
3076                  * list unless it is the only item, in which case we
3077                  * report an error.
3078                  */
3079                 if (cmd->o.len & F_NOT) {       /* "not any" never matches */
3080                         if (av == NULL && len == 0) /* only this entry */
3081                                 errx(EX_DATAERR, "not any never matches");
3082                 }
3083                 /* else do nothing and skip this entry */
3084                 return;
3085         }
3086         /* A single IP can be stored in an optimized format */
3087         if (d[1] == (uint32_t)~0 && av == NULL && len == 0) {
3088                 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32);
3089                 return;
3090         }
3091         len += 2;       /* two words... */
3092         d += 2;
3093     } /* end while */
3094     if (len + 1 > F_LEN_MASK)
3095         errx(EX_DATAERR, "address list too long");
3096     cmd->o.len |= len+1;
3097 }
3098
3099
3100 /* n2mask sets n bits of the mask */
3101 void
3102 n2mask(struct in6_addr *mask, int n)
3103 {
3104         static int      minimask[9] =
3105             { 0x00, 0x80, 0xc0, 0xe0, 0xf0, 0xf8, 0xfc, 0xfe, 0xff };
3106         u_char          *p;
3107
3108         memset(mask, 0, sizeof(struct in6_addr));
3109         p = (u_char *) mask;
3110         for (; n > 0; p++, n -= 8) {
3111                 if (n >= 8)
3112                         *p = 0xff;
3113                 else
3114                         *p = minimask[n];
3115         }
3116         return;
3117 }
3118
3119 static void
3120 fill_flags_cmd(ipfw_insn *cmd, enum ipfw_opcodes opcode,
3121         struct _s_x *flags, char *p)
3122 {
3123         char *e;
3124         uint32_t set = 0, clear = 0;
3125
3126         if (fill_flags(flags, p, &e, &set, &clear) != 0)
3127                 errx(EX_DATAERR, "invalid flag %s", e);
3128
3129         cmd->opcode = opcode;
3130         cmd->len =  (cmd->len & (F_NOT | F_OR)) | 1;
3131         cmd->arg1 = (set & 0xff) | ( (clear & 0xff) << 8);
3132 }
3133
3134
3135 void
3136 ipfw_delete(char *av[])
3137 {
3138         int i, j;
3139         int exitval = EX_OK;
3140         int do_set = 0;
3141         char *sep;
3142         ipfw_range_tlv rt;
3143
3144         av++;
3145         NEED1("missing rule specification");
3146         memset(&rt, 0, sizeof(rt));
3147         if ( *av && _substrcmp(*av, "set") == 0) {
3148                 /* Do not allow using the following syntax:
3149                  *      ipfw set N delete set M
3150                  */
3151                 if (co.use_set)
3152                         errx(EX_DATAERR, "invalid syntax");
3153                 do_set = 1;     /* delete set */
3154                 av++;
3155         }
3156
3157         /* Rule number */
3158         while (*av && isdigit(**av)) {
3159                 i = strtol(*av, &sep, 10);
3160                 j = i;
3161                 if (*sep== '-')
3162                         j = strtol(sep + 1, NULL, 10);
3163                 av++;
3164                 if (co.do_nat) {
3165                         exitval = do_cmd(IP_FW_NAT_DEL, &i, sizeof i);
3166                         if (exitval) {
3167                                 exitval = EX_UNAVAILABLE;
3168                                 warn("rule %u not available", i);
3169                         }
3170                 } else if (co.do_pipe) {
3171                         exitval = ipfw_delete_pipe(co.do_pipe, i);
3172                 } else {
3173                         if (do_set != 0) {
3174                                 rt.set = i & 31;
3175                                 rt.flags = IPFW_RCFLAG_SET;
3176                         } else {
3177                                 rt.start_rule = i & 0xffff;
3178                                 rt.end_rule = j & 0xffff;
3179                                 if (rt.start_rule == 0 && rt.end_rule == 0)
3180                                         rt.flags |= IPFW_RCFLAG_ALL;
3181                                 else
3182                                         rt.flags |= IPFW_RCFLAG_RANGE;
3183                                 if (co.use_set != 0) {
3184                                         rt.set = co.use_set - 1;
3185                                         rt.flags |= IPFW_RCFLAG_SET;
3186                                 }
3187                         }
3188                         i = do_range_cmd(IP_FW_XDEL, &rt);
3189                         if (i != 0) {
3190                                 exitval = EX_UNAVAILABLE;
3191                                 warn("rule %u: setsockopt(IP_FW_XDEL)",
3192                                     rt.start_rule);
3193                         } else if (rt.new_set == 0) {
3194                                 exitval = EX_UNAVAILABLE;
3195                                 if (rt.start_rule != rt.end_rule)
3196                                         warnx("no rules rules in %u-%u range",
3197                                             rt.start_rule, rt.end_rule);
3198                                 else
3199                                         warnx("rule %u not found",
3200                                             rt.start_rule);
3201                         }
3202                 }
3203         }
3204         if (exitval != EX_OK)
3205                 exit(exitval);
3206 }
3207
3208
3209 /*
3210  * fill the interface structure. We do not check the name as we can
3211  * create interfaces dynamically, so checking them at insert time
3212  * makes relatively little sense.
3213  * Interface names containing '*', '?', or '[' are assumed to be shell
3214  * patterns which match interfaces.
3215  */
3216 static void
3217 fill_iface(ipfw_insn_if *cmd, char *arg, int cblen, struct tidx *tstate)
3218 {
3219         char *p;
3220         uint16_t uidx;
3221
3222         cmd->name[0] = '\0';
3223         cmd->o.len |= F_INSN_SIZE(ipfw_insn_if);
3224
3225         CHECK_CMDLEN;
3226
3227         /* Parse the interface or address */
3228         if (strcmp(arg, "any") == 0)
3229                 cmd->o.len = 0;         /* effectively ignore this command */
3230         else if (strncmp(arg, "table(", 6) == 0) {
3231                 if ((p = strchr(arg + 6, ')')) == NULL)
3232                         errx(EX_DATAERR, "forgotten parenthesis: '%s'", arg);
3233                 *p = '\0';
3234                 p = strchr(arg + 6, ',');
3235                 if (p)
3236                         *p++ = '\0';
3237                 if ((uidx = pack_table(tstate, arg + 6)) == 0)
3238                         errx(EX_DATAERR, "Invalid table name: %s", arg + 6);
3239
3240                 cmd->name[0] = '\1'; /* Special value indicating table */
3241                 cmd->p.kidx = uidx;
3242         } else if (!isdigit(*arg)) {
3243                 strlcpy(cmd->name, arg, sizeof(cmd->name));
3244                 cmd->p.glob = strpbrk(arg, "*?[") != NULL ? 1 : 0;
3245         } else if (!inet_aton(arg, &cmd->p.ip))
3246                 errx(EX_DATAERR, "bad ip address ``%s''", arg);
3247 }
3248
3249 static void
3250 get_mac_addr_mask(const char *p, uint8_t *addr, uint8_t *mask)
3251 {
3252         int i;
3253         size_t l;
3254         char *ap, *ptr, *optr;
3255         struct ether_addr *mac;
3256         const char *macset = "0123456789abcdefABCDEF:";
3257
3258         if (strcmp(p, "any") == 0) {
3259                 for (i = 0; i < ETHER_ADDR_LEN; i++)
3260                         addr[i] = mask[i] = 0;
3261                 return;
3262         }
3263
3264         optr = ptr = strdup(p);
3265         if ((ap = strsep(&ptr, "&/")) != NULL && *ap != 0) {
3266                 l = strlen(ap);
3267                 if (strspn(ap, macset) != l || (mac = ether_aton(ap)) == NULL)
3268                         errx(EX_DATAERR, "Incorrect MAC address");
3269                 bcopy(mac, addr, ETHER_ADDR_LEN);
3270         } else
3271                 errx(EX_DATAERR, "Incorrect MAC address");
3272
3273         if (ptr != NULL) { /* we have mask? */
3274                 if (p[ptr - optr - 1] == '/') { /* mask len */
3275                         long ml = strtol(ptr, &ap, 10);
3276                         if (*ap != 0 || ml > ETHER_ADDR_LEN * 8 || ml < 0)
3277                                 errx(EX_DATAERR, "Incorrect mask length");
3278                         for (i = 0; ml > 0 && i < ETHER_ADDR_LEN; ml -= 8, i++)
3279                                 mask[i] = (ml >= 8) ? 0xff: (~0) << (8 - ml);
3280                 } else { /* mask */
3281                         l = strlen(ptr);
3282                         if (strspn(ptr, macset) != l ||
3283                             (mac = ether_aton(ptr)) == NULL)
3284                                 errx(EX_DATAERR, "Incorrect mask");
3285                         bcopy(mac, mask, ETHER_ADDR_LEN);
3286                 }
3287         } else { /* default mask: ff:ff:ff:ff:ff:ff */
3288                 for (i = 0; i < ETHER_ADDR_LEN; i++)
3289                         mask[i] = 0xff;
3290         }
3291         for (i = 0; i < ETHER_ADDR_LEN; i++)
3292                 addr[i] &= mask[i];
3293
3294         free(optr);
3295 }
3296
3297 /*
3298  * helper function, updates the pointer to cmd with the length
3299  * of the current command, and also cleans up the first word of
3300  * the new command in case it has been clobbered before.
3301  */
3302 static ipfw_insn *
3303 next_cmd(ipfw_insn *cmd, int *len)
3304 {
3305         *len -= F_LEN(cmd);
3306         CHECK_LENGTH(*len, 0);
3307         cmd += F_LEN(cmd);
3308         bzero(cmd, sizeof(*cmd));
3309         return cmd;
3310 }
3311
3312 /*
3313  * Takes arguments and copies them into a comment
3314  */
3315 static void
3316 fill_comment(ipfw_insn *cmd, char **av, int cblen)
3317 {
3318         int i, l;
3319         char *p = (char *)(cmd + 1);
3320
3321         cmd->opcode = O_NOP;
3322         cmd->len =  (cmd->len & (F_NOT | F_OR));
3323
3324         /* Compute length of comment string. */
3325         for (i = 0, l = 0; av[i] != NULL; i++)
3326                 l += strlen(av[i]) + 1;
3327         if (l == 0)
3328                 return;
3329         if (l > 84)
3330                 errx(EX_DATAERR,
3331                     "comment too long (max 80 chars)");
3332         l = 1 + (l+3)/4;
3333         cmd->len =  (cmd->len & (F_NOT | F_OR)) | l;
3334         CHECK_CMDLEN;
3335
3336         for (i = 0; av[i] != NULL; i++) {
3337                 strcpy(p, av[i]);
3338                 p += strlen(av[i]);
3339                 *p++ = ' ';
3340         }
3341         *(--p) = '\0';
3342 }
3343
3344 /*
3345  * A function to fill simple commands of size 1.
3346  * Existing flags are preserved.
3347  */
3348 static void
3349 fill_cmd(ipfw_insn *cmd, enum ipfw_opcodes opcode, int flags, uint16_t arg)
3350 {
3351         cmd->opcode = opcode;
3352         cmd->len =  ((cmd->len | flags) & (F_NOT | F_OR)) | 1;
3353         cmd->arg1 = arg;
3354 }
3355
3356 /*
3357  * Fetch and add the MAC address and type, with masks. This generates one or
3358  * two microinstructions, and returns the pointer to the last one.
3359  */
3360 static ipfw_insn *
3361 add_mac(ipfw_insn *cmd, char *av[], int cblen)
3362 {
3363         ipfw_insn_mac *mac;
3364
3365         if ( ( av[0] == NULL ) || ( av[1] == NULL ) )
3366                 errx(EX_DATAERR, "MAC dst src");
3367
3368         cmd->opcode = O_MACADDR2;
3369         cmd->len = (cmd->len & (F_NOT | F_OR)) | F_INSN_SIZE(ipfw_insn_mac);
3370         CHECK_CMDLEN;
3371
3372         mac = (ipfw_insn_mac *)cmd;
3373         get_mac_addr_mask(av[0], mac->addr, mac->mask); /* dst */
3374         get_mac_addr_mask(av[1], &(mac->addr[ETHER_ADDR_LEN]),
3375             &(mac->mask[ETHER_ADDR_LEN])); /* src */
3376         return cmd;
3377 }
3378
3379 static ipfw_insn *
3380 add_mactype(ipfw_insn *cmd, char *av, int cblen)
3381 {
3382         if (!av)
3383                 errx(EX_DATAERR, "missing MAC type");
3384         if (strcmp(av, "any") != 0) { /* we have a non-null type */
3385                 fill_newports((ipfw_insn_u16 *)cmd, av, IPPROTO_ETHERTYPE,
3386                     cblen);
3387                 cmd->opcode = O_MAC_TYPE;
3388                 return cmd;
3389         } else
3390                 return NULL;
3391 }
3392
3393 static ipfw_insn *
3394 add_proto0(ipfw_insn *cmd, char *av, u_char *protop)
3395 {
3396         struct protoent *pe;
3397         char *ep;
3398         int proto;
3399
3400         proto = strtol(av, &ep, 10);
3401         if (*ep != '\0' || proto <= 0) {
3402                 if ((pe = getprotobyname(av)) == NULL)
3403                         return NULL;
3404                 proto = pe->p_proto;
3405         }
3406
3407         fill_cmd(cmd, O_PROTO, 0, proto);
3408         *protop = proto;
3409         return cmd;
3410 }
3411
3412 static ipfw_insn *
3413 add_proto(ipfw_insn *cmd, char *av, u_char *protop)
3414 {
3415         u_char proto = IPPROTO_IP;
3416
3417         if (_substrcmp(av, "all") == 0 || strcmp(av, "ip") == 0)
3418                 ; /* do not set O_IP4 nor O_IP6 */
3419         else if (strcmp(av, "ip4") == 0)
3420                 /* explicit "just IPv4" rule */
3421                 fill_cmd(cmd, O_IP4, 0, 0);
3422         else if (strcmp(av, "ip6") == 0) {
3423                 /* explicit "just IPv6" rule */
3424                 proto = IPPROTO_IPV6;
3425                 fill_cmd(cmd, O_IP6, 0, 0);
3426         } else
3427                 return add_proto0(cmd, av, protop);
3428
3429         *protop = proto;
3430         return cmd;
3431 }
3432
3433 static ipfw_insn *
3434 add_proto_compat(ipfw_insn *cmd, char *av, u_char *protop)
3435 {
3436         u_char proto = IPPROTO_IP;
3437
3438         if (_substrcmp(av, "all") == 0 || strcmp(av, "ip") == 0)
3439                 ; /* do not set O_IP4 nor O_IP6 */
3440         else if (strcmp(av, "ipv4") == 0 || strcmp(av, "ip4") == 0)
3441                 /* explicit "just IPv4" rule */
3442                 fill_cmd(cmd, O_IP4, 0, 0);
3443         else if (strcmp(av, "ipv6") == 0 || strcmp(av, "ip6") == 0) {
3444                 /* explicit "just IPv6" rule */
3445                 proto = IPPROTO_IPV6;
3446                 fill_cmd(cmd, O_IP6, 0, 0);
3447         } else
3448                 return add_proto0(cmd, av, protop);
3449
3450         *protop = proto;
3451         return cmd;
3452 }
3453
3454 static ipfw_insn *
3455 add_srcip(ipfw_insn *cmd, char *av, int cblen, struct tidx *tstate)
3456 {
3457         fill_ip((ipfw_insn_ip *)cmd, av, cblen, tstate);
3458         if (cmd->opcode == O_IP_DST_SET)                        /* set */
3459                 cmd->opcode = O_IP_SRC_SET;
3460         else if (cmd->opcode == O_IP_DST_LOOKUP)                /* table */
3461                 cmd->opcode = O_IP_SRC_LOOKUP;
3462         else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn))          /* me */
3463                 cmd->opcode = O_IP_SRC_ME;
3464         else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_u32))      /* one IP */
3465                 cmd->opcode = O_IP_SRC;
3466         else                                                    /* addr/mask */
3467                 cmd->opcode = O_IP_SRC_MASK;
3468         return cmd;
3469 }
3470
3471 static ipfw_insn *
3472 add_dstip(ipfw_insn *cmd, char *av, int cblen, struct tidx *tstate)
3473 {
3474         fill_ip((ipfw_insn_ip *)cmd, av, cblen, tstate);
3475         if (cmd->opcode == O_IP_DST_SET)                        /* set */
3476                 ;
3477         else if (cmd->opcode == O_IP_DST_LOOKUP)                /* table */
3478                 ;
3479         else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn))          /* me */
3480                 cmd->opcode = O_IP_DST_ME;
3481         else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_u32))      /* one IP */
3482                 cmd->opcode = O_IP_DST;
3483         else                                                    /* addr/mask */
3484                 cmd->opcode = O_IP_DST_MASK;
3485         return cmd;
3486 }
3487
3488 static struct _s_x f_reserved_keywords[] = {
3489         { "altq",       TOK_OR },
3490         { "//",         TOK_OR },
3491         { "diverted",   TOK_OR },
3492         { "dst-port",   TOK_OR },
3493         { "src-port",   TOK_OR },
3494         { "established",        TOK_OR },
3495         { "keep-state", TOK_OR },
3496         { "frag",       TOK_OR },
3497         { "icmptypes",  TOK_OR },
3498         { "in",         TOK_OR },
3499         { "out",        TOK_OR },
3500         { "ip6",        TOK_OR },
3501         { "any",        TOK_OR },
3502         { "to",         TOK_OR },
3503         { "via",        TOK_OR },
3504         { "{",          TOK_OR },
3505         { NULL, 0 }     /* terminator */
3506 };
3507
3508 static ipfw_insn *
3509 add_ports(ipfw_insn *cmd, char *av, u_char proto, int opcode, int cblen)
3510 {
3511
3512         if (match_token(f_reserved_keywords, av) != -1)
3513                 return (NULL);
3514
3515         if (fill_newports((ipfw_insn_u16 *)cmd, av, proto, cblen)) {
3516                 /* XXX todo: check that we have a protocol with ports */
3517                 cmd->opcode = opcode;
3518                 return cmd;
3519         }
3520         return NULL;
3521 }
3522
3523 static ipfw_insn *
3524 add_src(ipfw_insn *cmd, char *av, u_char proto, int cblen, struct tidx *tstate)
3525 {
3526         struct in6_addr a;
3527         char *host, *ch, buf[INET6_ADDRSTRLEN];
3528         ipfw_insn *ret = NULL;
3529         int len;
3530
3531         /* Copy first address in set if needed */
3532         if ((ch = strpbrk(av, "/,")) != NULL) {
3533                 len = ch - av;
3534                 strlcpy(buf, av, sizeof(buf));
3535                 if (len < sizeof(buf))
3536                         buf[len] = '\0';
3537                 host = buf;
3538         } else
3539                 host = av;
3540
3541         if (proto == IPPROTO_IPV6  || strcmp(av, "me6") == 0 ||
3542             inet_pton(AF_INET6, host, &a) == 1)
3543                 ret = add_srcip6(cmd, av, cblen);
3544         /* XXX: should check for IPv4, not !IPv6 */
3545         if (ret == NULL && (proto == IPPROTO_IP || strcmp(av, "me") == 0 ||
3546             inet_pton(AF_INET6, host, &a) != 1))
3547                 ret = add_srcip(cmd, av, cblen, tstate);
3548         if (ret == NULL && strcmp(av, "any") != 0)
3549                 ret = cmd;
3550
3551         return ret;
3552 }
3553
3554 static ipfw_insn *
3555 add_dst(ipfw_insn *cmd, char *av, u_char proto, int cblen, struct tidx *tstate)
3556 {
3557         struct in6_addr a;
3558         char *host, *ch, buf[INET6_ADDRSTRLEN];
3559         ipfw_insn *ret = NULL;
3560         int len;
3561
3562         /* Copy first address in set if needed */
3563         if ((ch = strpbrk(av, "/,")) != NULL) {
3564                 len = ch - av;
3565                 strlcpy(buf, av, sizeof(buf));
3566                 if (len < sizeof(buf))
3567                         buf[len] = '\0';
3568                 host = buf;
3569         } else
3570                 host = av;
3571
3572         if (proto == IPPROTO_IPV6  || strcmp(av, "me6") == 0 ||
3573             inet_pton(AF_INET6, host, &a) == 1)
3574                 ret = add_dstip6(cmd, av, cblen);
3575         /* XXX: should check for IPv4, not !IPv6 */
3576         if (ret == NULL && (proto == IPPROTO_IP || strcmp(av, "me") == 0 ||
3577             inet_pton(AF_INET6, host, &a) != 1))
3578                 ret = add_dstip(cmd, av, cblen, tstate);
3579         if (ret == NULL && strcmp(av, "any") != 0)
3580                 ret = cmd;
3581
3582         return ret;
3583 }
3584
3585 /*
3586  * Parse arguments and assemble the microinstructions which make up a rule.
3587  * Rules are added into the 'rulebuf' and then copied in the correct order
3588  * into the actual rule.
3589  *
3590  * The syntax for a rule starts with the action, followed by
3591  * optional action parameters, and the various match patterns.
3592  * In the assembled microcode, the first opcode must be an O_PROBE_STATE
3593  * (generated if the rule includes a keep-state option), then the
3594  * various match patterns, log/altq actions, and the actual action.
3595  *
3596  */
3597 void
3598 compile_rule(char *av[], uint32_t *rbuf, int *rbufsize, struct tidx *tstate)
3599 {
3600         /*
3601          * rules are added into the 'rulebuf' and then copied in
3602          * the correct order into the actual rule.
3603          * Some things that need to go out of order (prob, action etc.)
3604          * go into actbuf[].
3605          */
3606         static uint32_t actbuf[255], cmdbuf[255];
3607         int rblen, ablen, cblen;
3608
3609         ipfw_insn *src, *dst, *cmd, *action, *prev=NULL;
3610         ipfw_insn *first_cmd;   /* first match pattern */
3611
3612         struct ip_fw_rule *rule;
3613
3614         /*
3615          * various flags used to record that we entered some fields.
3616          */
3617         ipfw_insn *have_state = NULL;   /* check-state or keep-state */
3618         ipfw_insn *have_log = NULL, *have_altq = NULL, *have_tag = NULL;
3619         size_t len;
3620
3621         int i;
3622
3623         int open_par = 0;       /* open parenthesis ( */
3624
3625         /* proto is here because it is used to fetch ports */
3626         u_char proto = IPPROTO_IP;      /* default protocol */
3627
3628         double match_prob = 1; /* match probability, default is always match */
3629
3630         bzero(actbuf, sizeof(actbuf));          /* actions go here */
3631         bzero(cmdbuf, sizeof(cmdbuf));
3632         bzero(rbuf, *rbufsize);
3633
3634         rule = (struct ip_fw_rule *)rbuf;
3635         cmd = (ipfw_insn *)cmdbuf;
3636         action = (ipfw_insn *)actbuf;
3637
3638         rblen = *rbufsize / sizeof(uint32_t);
3639         rblen -= sizeof(struct ip_fw_rule) / sizeof(uint32_t);
3640         ablen = sizeof(actbuf) / sizeof(actbuf[0]);
3641         cblen = sizeof(cmdbuf) / sizeof(cmdbuf[0]);
3642         cblen -= F_INSN_SIZE(ipfw_insn_u32) + 1;
3643
3644 #define CHECK_RBUFLEN(len)      { CHECK_LENGTH(rblen, len); rblen -= len; }
3645 #define CHECK_ACTLEN            CHECK_LENGTH(ablen, action->len)
3646
3647         av++;
3648
3649         /* [rule N]     -- Rule number optional */
3650         if (av[0] && isdigit(**av)) {
3651                 rule->rulenum = atoi(*av);
3652                 av++;
3653         }
3654
3655         /* [set N]      -- set number (0..RESVD_SET), optional */
3656         if (av[0] && av[1] && _substrcmp(*av, "set") == 0) {
3657                 int set = strtoul(av[1], NULL, 10);
3658                 if (set < 0 || set > RESVD_SET)
3659                         errx(EX_DATAERR, "illegal set %s", av[1]);
3660                 rule->set = set;
3661                 tstate->set = set;
3662                 av += 2;
3663         }
3664
3665         /* [prob D]     -- match probability, optional */
3666         if (av[0] && av[1] && _substrcmp(*av, "prob") == 0) {
3667                 match_prob = strtod(av[1], NULL);
3668
3669                 if (match_prob <= 0 || match_prob > 1)
3670                         errx(EX_DATAERR, "illegal match prob. %s", av[1]);
3671                 av += 2;
3672         }
3673
3674         /* action       -- mandatory */
3675         NEED1("missing action");
3676         i = match_token(rule_actions, *av);
3677         av++;
3678         action->len = 1;        /* default */
3679         CHECK_ACTLEN;
3680         switch(i) {
3681         case TOK_CHECKSTATE:
3682                 have_state = action;
3683                 action->opcode = O_CHECK_STATE;
3684                 break;
3685
3686         case TOK_ACCEPT:
3687                 action->opcode = O_ACCEPT;
3688                 break;
3689
3690         case TOK_DENY:
3691                 action->opcode = O_DENY;
3692                 action->arg1 = 0;
3693                 break;
3694
3695         case TOK_REJECT:
3696                 action->opcode = O_REJECT;
3697                 action->arg1 = ICMP_UNREACH_HOST;
3698                 break;
3699
3700         case TOK_RESET:
3701                 action->opcode = O_REJECT;
3702                 action->arg1 = ICMP_REJECT_RST;
3703                 break;
3704
3705         case TOK_RESET6:
3706                 action->opcode = O_UNREACH6;
3707                 action->arg1 = ICMP6_UNREACH_RST;
3708                 break;
3709
3710         case TOK_UNREACH:
3711                 action->opcode = O_REJECT;
3712                 NEED1("missing reject code");
3713                 fill_reject_code(&action->arg1, *av);
3714                 av++;
3715                 break;
3716
3717         case TOK_UNREACH6:
3718                 action->opcode = O_UNREACH6;
3719                 NEED1("missing unreach code");
3720                 fill_unreach6_code(&action->arg1, *av);
3721                 av++;
3722                 break;
3723
3724         case TOK_COUNT:
3725                 action->opcode = O_COUNT;
3726                 break;
3727
3728         case TOK_NAT:
3729                 action->opcode = O_NAT;
3730                 action->len = F_INSN_SIZE(ipfw_insn_nat);
3731                 CHECK_ACTLEN;
3732                 if (*av != NULL && _substrcmp(*av, "global") == 0) {
3733                         action->arg1 = 0;
3734                         av++;
3735                         break;
3736                 } else
3737                         goto chkarg;
3738         case TOK_QUEUE:
3739                 action->opcode = O_QUEUE;
3740                 goto chkarg;
3741         case TOK_PIPE:
3742                 action->opcode = O_PIPE;
3743                 goto chkarg;
3744         case TOK_SKIPTO:
3745                 action->opcode = O_SKIPTO;
3746                 goto chkarg;
3747         case TOK_NETGRAPH:
3748                 action->opcode = O_NETGRAPH;
3749                 goto chkarg;
3750         case TOK_NGTEE:
3751                 action->opcode = O_NGTEE;
3752                 goto chkarg;
3753         case TOK_DIVERT:
3754                 action->opcode = O_DIVERT;
3755                 goto chkarg;
3756         case TOK_TEE:
3757                 action->opcode = O_TEE;
3758                 goto chkarg;
3759         case TOK_CALL:
3760                 action->opcode = O_CALLRETURN;
3761 chkarg:
3762                 if (!av[0])
3763                         errx(EX_USAGE, "missing argument for %s", *(av - 1));
3764                 if (isdigit(**av)) {
3765                         action->arg1 = strtoul(*av, NULL, 10);
3766                         if (action->arg1 <= 0 || action->arg1 >= IP_FW_TABLEARG)
3767                                 errx(EX_DATAERR, "illegal argument for %s",
3768                                     *(av - 1));
3769                 } else if (_substrcmp(*av, "tablearg") == 0) {
3770                         action->arg1 = IP_FW_TARG;
3771                 } else if (i == TOK_DIVERT || i == TOK_TEE) {
3772                         struct servent *s;
3773                         setservent(1);
3774                         s = getservbyname(av[0], "divert");
3775                         if (s != NULL)
3776                                 action->arg1 = ntohs(s->s_port);
3777                         else
3778                                 errx(EX_DATAERR, "illegal divert/tee port");
3779                 } else
3780                         errx(EX_DATAERR, "illegal argument for %s", *(av - 1));
3781                 av++;
3782                 break;
3783
3784         case TOK_FORWARD: {
3785                 /*
3786                  * Locate the address-port separator (':' or ',').
3787                  * Could be one of the following:
3788                  *      hostname:port
3789                  *      IPv4 a.b.c.d,port
3790                  *      IPv4 a.b.c.d:port
3791                  *      IPv6 w:x:y::z,port
3792                  * The ':' can only be used with hostname and IPv4 address.
3793                  * XXX-BZ Should we also support [w:x:y::z]:port?
3794                  */
3795                 struct sockaddr_storage result;
3796                 struct addrinfo *res;
3797                 char *s, *end;
3798                 int family;
3799                 u_short port_number;
3800
3801                 NEED1("missing forward address[:port]");
3802
3803                 /*
3804                  * locate the address-port separator (':' or ',')
3805                  */
3806                 s = strchr(*av, ',');
3807                 if (s == NULL) {
3808                         /* Distinguish between IPv4:port and IPv6 cases. */
3809                         s = strchr(*av, ':');
3810                         if (s && strchr(s+1, ':'))
3811                                 s = NULL; /* no port */
3812                 }
3813
3814                 port_number = 0;
3815                 if (s != NULL) {
3816                         /* Terminate host portion and set s to start of port. */
3817                         *(s++) = '\0';
3818                         i = strtoport(s, &end, 0 /* base */, 0 /* proto */);
3819                         if (s == end)
3820                                 errx(EX_DATAERR,
3821                                     "illegal forwarding port ``%s''", s);
3822                         port_number = (u_short)i;
3823                 }
3824
3825                 if (_substrcmp(*av, "tablearg") == 0) {
3826                         family = PF_INET;
3827                         ((struct sockaddr_in*)&result)->sin_addr.s_addr =
3828                             INADDR_ANY;
3829                 } else {
3830                         /*
3831                          * Resolve the host name or address to a family and a
3832                          * network representation of the address.
3833                          */
3834                         if (getaddrinfo(*av, NULL, NULL, &res))
3835                                 errx(EX_DATAERR, NULL);
3836                         /* Just use the first host in the answer. */
3837                         family = res->ai_family;
3838                         memcpy(&result, res->ai_addr, res->ai_addrlen);
3839                         freeaddrinfo(res);
3840                 }
3841
3842                 if (family == PF_INET) {
3843                         ipfw_insn_sa *p = (ipfw_insn_sa *)action;
3844
3845                         action->opcode = O_FORWARD_IP;
3846                         action->len = F_INSN_SIZE(ipfw_insn_sa);
3847                         CHECK_ACTLEN;
3848
3849                         /*
3850                          * In the kernel we assume AF_INET and use only
3851                          * sin_port and sin_addr. Remember to set sin_len as
3852                          * the routing code seems to use it too.
3853                          */
3854                         p->sa.sin_len = sizeof(struct sockaddr_in);
3855                         p->sa.sin_family = AF_INET;
3856                         p->sa.sin_port = port_number;
3857                         p->sa.sin_addr.s_addr =
3858                              ((struct sockaddr_in *)&result)->sin_addr.s_addr;
3859                 } else if (family == PF_INET6) {
3860                         ipfw_insn_sa6 *p = (ipfw_insn_sa6 *)action;
3861
3862                         action->opcode = O_FORWARD_IP6;
3863                         action->len = F_INSN_SIZE(ipfw_insn_sa6);
3864                         CHECK_ACTLEN;
3865
3866                         p->sa.sin6_len = sizeof(struct sockaddr_in6);
3867                         p->sa.sin6_family = AF_INET6;
3868                         p->sa.sin6_port = port_number;
3869                         p->sa.sin6_flowinfo = 0;
3870                         p->sa.sin6_scope_id =
3871                             ((struct sockaddr_in6 *)&result)->sin6_scope_id;
3872                         bcopy(&((struct sockaddr_in6*)&result)->sin6_addr,
3873                             &p->sa.sin6_addr, sizeof(p->sa.sin6_addr));
3874                 } else {
3875                         errx(EX_DATAERR, "Invalid address family in forward action");
3876                 }
3877                 av++;
3878                 break;
3879             }
3880         case TOK_COMMENT:
3881                 /* pretend it is a 'count' rule followed by the comment */
3882                 action->opcode = O_COUNT;
3883                 av--;           /* go back... */
3884                 break;
3885
3886         case TOK_SETFIB:
3887             {
3888                 int numfibs;
3889                 size_t intsize = sizeof(int);
3890
3891                 action->opcode = O_SETFIB;
3892                 NEED1("missing fib number");
3893                 if (_substrcmp(*av, "tablearg") == 0) {
3894                         action->arg1 = IP_FW_TARG;
3895                 } else {
3896                         action->arg1 = strtoul(*av, NULL, 10);
3897                         if (sysctlbyname("net.fibs", &numfibs, &intsize,
3898                             NULL, 0) == -1)
3899                                 errx(EX_DATAERR, "fibs not suported.\n");
3900                         if (action->arg1 >= numfibs)  /* Temporary */
3901                                 errx(EX_DATAERR, "fib too large.\n");
3902                         /* Add high-order bit to fib to make room for tablearg*/
3903                         action->arg1 |= 0x8000;
3904                 }
3905                 av++;
3906                 break;
3907             }
3908
3909         case TOK_SETDSCP:
3910             {
3911                 int code;
3912
3913                 action->opcode = O_SETDSCP;
3914                 NEED1("missing DSCP code");
3915                 if (_substrcmp(*av, "tablearg") == 0) {
3916                         action->arg1 = IP_FW_TARG;
3917                 } else if (isalpha(*av[0])) {
3918                         if ((code = match_token(f_ipdscp, *av)) == -1)
3919                                 errx(EX_DATAERR, "Unknown DSCP code");
3920                         action->arg1 = code;
3921                 } else
3922                         action->arg1 = strtoul(*av, NULL, 10);
3923                 /* Add high-order bit to DSCP to make room for tablearg */
3924                 if (action->arg1 != IP_FW_TARG)
3925                         action->arg1 |= 0x8000;
3926                 av++;
3927                 break;
3928             }
3929
3930         case TOK_REASS:
3931                 action->opcode = O_REASS;
3932                 break;
3933
3934         case TOK_RETURN:
3935                 fill_cmd(action, O_CALLRETURN, F_NOT, 0);
3936                 break;
3937
3938         default:
3939                 av--;
3940                 if (match_token(rule_eactions, *av) == -1)
3941                         errx(EX_DATAERR, "invalid action %s\n", *av);
3942                 /*
3943                  * External actions support.
3944                  * XXX: we support only syntax with instance name.
3945                  *      For known external actions (from rule_eactions list)
3946                  *      we can handle syntax directly. But with `eaction'
3947                  *      keyword we can use only `eaction <name> <instance>'
3948                  *      syntax.
3949                  */
3950         case TOK_EACTION: {
3951                 uint16_t idx;
3952
3953                 NEED1("Missing eaction name");
3954                 if (eaction_check_name(*av) != 0)
3955                         errx(EX_DATAERR, "Invalid eaction name %s", *av);
3956                 idx = pack_object(tstate, *av, IPFW_TLV_EACTION);
3957                 if (idx == 0)
3958                         errx(EX_DATAERR, "pack_object failed");
3959                 fill_cmd(action, O_EXTERNAL_ACTION, 0, idx);
3960                 av++;
3961                 NEED1("Missing eaction instance name");
3962                 action = next_cmd(action, &ablen);
3963                 action->len = 1;
3964                 CHECK_ACTLEN;
3965                 if (eaction_check_name(*av) != 0)
3966                         errx(EX_DATAERR, "Invalid eaction instance name %s",
3967                             *av);
3968                 /*
3969                  * External action instance object has TLV type depended
3970                  * from the external action name object index. Since we
3971                  * currently don't know this index, use zero as TLV type.
3972                  */
3973                 idx = pack_object(tstate, *av, 0);
3974                 if (idx == 0)
3975                         errx(EX_DATAERR, "pack_object failed");
3976                 fill_cmd(action, O_EXTERNAL_INSTANCE, 0, idx);
3977                 av++;
3978                 }
3979         }
3980         action = next_cmd(action, &ablen);
3981
3982         /*
3983          * [altq queuename] -- altq tag, optional
3984          * [log [logamount N]]  -- log, optional
3985          *
3986          * If they exist, it go first in the cmdbuf, but then it is
3987          * skipped in the copy section to the end of the buffer.
3988          */
3989         while (av[0] != NULL && (i = match_token(rule_action_params, *av)) != -1) {
3990                 av++;
3991                 switch (i) {
3992                 case TOK_LOG:
3993                     {
3994                         ipfw_insn_log *c = (ipfw_insn_log *)cmd;
3995                         int l;
3996
3997                         if (have_log)
3998                                 errx(EX_DATAERR,
3999                                     "log cannot be specified more than once");
4000                         have_log = (ipfw_insn *)c;
4001                         cmd->len = F_INSN_SIZE(ipfw_insn_log);
4002                         CHECK_CMDLEN;
4003                         cmd->opcode = O_LOG;
4004                         if (av[0] && _substrcmp(*av, "logamount") == 0) {
4005                                 av++;
4006                                 NEED1("logamount requires argument");
4007                                 l = atoi(*av);
4008                                 if (l < 0)
4009                                         errx(EX_DATAERR,
4010                                             "logamount must be positive");
4011                                 c->max_log = l;
4012                                 av++;
4013                         } else {
4014                                 len = sizeof(c->max_log);
4015                                 if (sysctlbyname("net.inet.ip.fw.verbose_limit",
4016                                     &c->max_log, &len, NULL, 0) == -1) {
4017                                         if (co.test_only) {
4018                                                 c->max_log = 0;
4019                                                 break;
4020                                         }
4021                                         errx(1, "sysctlbyname(\"%s\")",
4022                                             "net.inet.ip.fw.verbose_limit");
4023                                 }
4024                         }
4025                     }
4026                         break;
4027
4028 #ifndef NO_ALTQ
4029                 case TOK_ALTQ:
4030                     {
4031                         ipfw_insn_altq *a = (ipfw_insn_altq *)cmd;
4032
4033                         NEED1("missing altq queue name");
4034                         if (have_altq)
4035                                 errx(EX_DATAERR,
4036                                     "altq cannot be specified more than once");
4037                         have_altq = (ipfw_insn *)a;
4038                         cmd->len = F_INSN_SIZE(ipfw_insn_altq);
4039                         CHECK_CMDLEN;
4040                         cmd->opcode = O_ALTQ;
4041                         a->qid = altq_name_to_qid(*av);
4042                         av++;
4043                     }
4044                         break;
4045 #endif
4046
4047                 case TOK_TAG:
4048                 case TOK_UNTAG: {
4049                         uint16_t tag;
4050
4051                         if (have_tag)
4052                                 errx(EX_USAGE, "tag and untag cannot be "
4053                                     "specified more than once");
4054                         GET_UINT_ARG(tag, IPFW_ARG_MIN, IPFW_ARG_MAX, i,
4055                            rule_action_params);
4056                         have_tag = cmd;
4057                         fill_cmd(cmd, O_TAG, (i == TOK_TAG) ? 0: F_NOT, tag);
4058                         av++;
4059                         break;
4060                 }
4061
4062                 default:
4063                         abort();
4064                 }
4065                 cmd = next_cmd(cmd, &cblen);
4066         }
4067
4068         if (have_state) /* must be a check-state, we are done */
4069                 goto done;
4070
4071 #define OR_START(target)                                        \
4072         if (av[0] && (*av[0] == '(' || *av[0] == '{')) {        \
4073                 if (open_par)                                   \
4074                         errx(EX_USAGE, "nested \"(\" not allowed\n"); \
4075                 prev = NULL;                                    \
4076                 open_par = 1;                                   \
4077                 if ( (av[0])[1] == '\0') {                      \
4078                         av++;                                   \
4079                 } else                                          \
4080                         (*av)++;                                \
4081         }                                                       \
4082         target:                                                 \
4083
4084
4085 #define CLOSE_PAR                                               \
4086         if (open_par) {                                         \
4087                 if (av[0] && (                                  \
4088                     strcmp(*av, ")") == 0 ||                    \
4089                     strcmp(*av, "}") == 0)) {                   \
4090                         prev = NULL;                            \
4091                         open_par = 0;                           \
4092                         av++;                                   \
4093                 } else                                          \
4094                         errx(EX_USAGE, "missing \")\"\n");      \
4095         }
4096
4097 #define NOT_BLOCK                                               \
4098         if (av[0] && _substrcmp(*av, "not") == 0) {             \
4099                 if (cmd->len & F_NOT)                           \
4100                         errx(EX_USAGE, "double \"not\" not allowed\n"); \
4101                 cmd->len |= F_NOT;                              \
4102                 av++;                                           \
4103         }
4104
4105 #define OR_BLOCK(target)                                        \
4106         if (av[0] && _substrcmp(*av, "or") == 0) {              \
4107                 if (prev == NULL || open_par == 0)              \
4108                         errx(EX_DATAERR, "invalid OR block");   \
4109                 prev->len |= F_OR;                              \
4110                 av++;                                   \
4111                 goto target;                                    \
4112         }                                                       \
4113         CLOSE_PAR;
4114
4115         first_cmd = cmd;
4116
4117 #if 0
4118         /*
4119          * MAC addresses, optional.
4120          * If we have this, we skip the part "proto from src to dst"
4121          * and jump straight to the option parsing.
4122          */
4123         NOT_BLOCK;
4124         NEED1("missing protocol");
4125         if (_substrcmp(*av, "MAC") == 0 ||
4126             _substrcmp(*av, "mac") == 0) {
4127                 av++;                   /* the "MAC" keyword */
4128                 add_mac(cmd, av);       /* exits in case of errors */
4129                 cmd = next_cmd(cmd);
4130                 av += 2;                /* dst-mac and src-mac */
4131                 NOT_BLOCK;
4132                 NEED1("missing mac type");
4133                 if (add_mactype(cmd, av[0]))
4134                         cmd = next_cmd(cmd);
4135                 av++;                   /* any or mac-type */
4136                 goto read_options;
4137         }
4138 #endif
4139
4140         /*
4141          * protocol, mandatory
4142          */
4143     OR_START(get_proto);
4144         NOT_BLOCK;
4145         NEED1("missing protocol");
4146         if (add_proto_compat(cmd, *av, &proto)) {
4147                 av++;
4148                 if (F_LEN(cmd) != 0) {
4149                         prev = cmd;
4150                         cmd = next_cmd(cmd, &cblen);
4151                 }
4152         } else if (first_cmd != cmd) {
4153                 errx(EX_DATAERR, "invalid protocol ``%s''", *av);
4154         } else
4155                 goto read_options;
4156     OR_BLOCK(get_proto);
4157
4158         /*
4159          * "from", mandatory
4160          */
4161         if ((av[0] == NULL) || _substrcmp(*av, "from") != 0)
4162                 errx(EX_USAGE, "missing ``from''");
4163         av++;
4164
4165         /*
4166          * source IP, mandatory
4167          */
4168     OR_START(source_ip);
4169         NOT_BLOCK;      /* optional "not" */
4170         NEED1("missing source address");
4171         if (add_src(cmd, *av, proto, cblen, tstate)) {
4172                 av++;
4173                 if (F_LEN(cmd) != 0) {  /* ! any */
4174                         prev = cmd;
4175                         cmd = next_cmd(cmd, &cblen);
4176                 }
4177         } else
4178                 errx(EX_USAGE, "bad source address %s", *av);
4179     OR_BLOCK(source_ip);
4180
4181         /*
4182          * source ports, optional
4183          */
4184         NOT_BLOCK;      /* optional "not" */
4185         if ( av[0] != NULL ) {
4186                 if (_substrcmp(*av, "any") == 0 ||
4187                     add_ports(cmd, *av, proto, O_IP_SRCPORT, cblen)) {
4188                         av++;
4189                         if (F_LEN(cmd) != 0)
4190                                 cmd = next_cmd(cmd, &cblen);
4191                 }
4192         }
4193
4194         /*
4195          * "to", mandatory
4196          */
4197         if ( (av[0] == NULL) || _substrcmp(*av, "to") != 0 )
4198                 errx(EX_USAGE, "missing ``to''");
4199         av++;
4200
4201         /*
4202          * destination, mandatory
4203          */
4204     OR_START(dest_ip);
4205         NOT_BLOCK;      /* optional "not" */
4206         NEED1("missing dst address");
4207         if (add_dst(cmd, *av, proto, cblen, tstate)) {
4208                 av++;
4209                 if (F_LEN(cmd) != 0) {  /* ! any */
4210                         prev = cmd;
4211                         cmd = next_cmd(cmd, &cblen);
4212                 }
4213         } else
4214                 errx( EX_USAGE, "bad destination address %s", *av);
4215     OR_BLOCK(dest_ip);
4216
4217         /*
4218          * dest. ports, optional
4219          */
4220         NOT_BLOCK;      /* optional "not" */
4221         if (av[0]) {
4222                 if (_substrcmp(*av, "any") == 0 ||
4223                     add_ports(cmd, *av, proto, O_IP_DSTPORT, cblen)) {
4224                         av++;
4225                         if (F_LEN(cmd) != 0)
4226                                 cmd = next_cmd(cmd, &cblen);
4227                 }
4228         }
4229
4230 read_options:
4231         if (av[0] && first_cmd == cmd) {
4232                 /*
4233                  * nothing specified so far, store in the rule to ease
4234                  * printout later.
4235                  */
4236                  rule->flags |= IPFW_RULE_NOOPT;
4237         }
4238         prev = NULL;
4239         while ( av[0] != NULL ) {
4240                 char *s;
4241                 ipfw_insn_u32 *cmd32;   /* alias for cmd */
4242
4243                 s = *av;
4244                 cmd32 = (ipfw_insn_u32 *)cmd;
4245
4246                 if (*s == '!') {        /* alternate syntax for NOT */
4247                         if (cmd->len & F_NOT)
4248                                 errx(EX_USAGE, "double \"not\" not allowed\n");
4249                         cmd->len = F_NOT;
4250                         s++;
4251                 }
4252                 i = match_token(rule_options, s);
4253                 av++;
4254                 switch(i) {
4255                 case TOK_NOT:
4256                         if (cmd->len & F_NOT)
4257                                 errx(EX_USAGE, "double \"not\" not allowed\n");
4258                         cmd->len = F_NOT;
4259                         break;
4260
4261                 case TOK_OR:
4262                         if (open_par == 0 || prev == NULL)
4263                                 errx(EX_USAGE, "invalid \"or\" block\n");
4264                         prev->len |= F_OR;
4265                         break;
4266
4267                 case TOK_STARTBRACE:
4268                         if (open_par)
4269                                 errx(EX_USAGE, "+nested \"(\" not allowed\n");
4270                         open_par = 1;
4271                         break;
4272
4273                 case TOK_ENDBRACE:
4274                         if (!open_par)
4275                                 errx(EX_USAGE, "+missing \")\"\n");
4276                         open_par = 0;
4277                         prev = NULL;
4278                         break;
4279
4280                 case TOK_IN:
4281                         fill_cmd(cmd, O_IN, 0, 0);
4282                         break;
4283
4284                 case TOK_OUT:
4285                         cmd->len ^= F_NOT; /* toggle F_NOT */
4286                         fill_cmd(cmd, O_IN, 0, 0);
4287                         break;
4288
4289                 case TOK_DIVERTED:
4290                         fill_cmd(cmd, O_DIVERTED, 0, 3);
4291                         break;
4292
4293                 case TOK_DIVERTEDLOOPBACK:
4294                         fill_cmd(cmd, O_DIVERTED, 0, 1);
4295                         break;
4296
4297                 case TOK_DIVERTEDOUTPUT:
4298                         fill_cmd(cmd, O_DIVERTED, 0, 2);
4299                         break;
4300
4301                 case TOK_FRAG:
4302                         fill_cmd(cmd, O_FRAG, 0, 0);
4303                         break;
4304
4305                 case TOK_LAYER2:
4306                         fill_cmd(cmd, O_LAYER2, 0, 0);
4307                         break;
4308
4309                 case TOK_XMIT:
4310                 case TOK_RECV:
4311                 case TOK_VIA:
4312                         NEED1("recv, xmit, via require interface name"
4313                                 " or address");
4314                         fill_iface((ipfw_insn_if *)cmd, av[0], cblen, tstate);
4315                         av++;
4316                         if (F_LEN(cmd) == 0)    /* not a valid address */
4317                                 break;
4318                         if (i == TOK_XMIT)
4319                                 cmd->opcode = O_XMIT;
4320                         else if (i == TOK_RECV)
4321                                 cmd->opcode = O_RECV;
4322                         else if (i == TOK_VIA)
4323                                 cmd->opcode = O_VIA;
4324                         break;
4325
4326                 case TOK_ICMPTYPES:
4327                         NEED1("icmptypes requires list of types");
4328                         fill_icmptypes((ipfw_insn_u32 *)cmd, *av);
4329                         av++;
4330                         break;
4331
4332                 case TOK_ICMP6TYPES:
4333                         NEED1("icmptypes requires list of types");
4334                         fill_icmp6types((ipfw_insn_icmp6 *)cmd, *av, cblen);
4335                         av++;
4336                         break;
4337
4338                 case TOK_IPTTL:
4339                         NEED1("ipttl requires TTL");
4340                         if (strpbrk(*av, "-,")) {
4341                             if (!add_ports(cmd, *av, 0, O_IPTTL, cblen))
4342                                 errx(EX_DATAERR, "invalid ipttl %s", *av);
4343                         } else
4344                             fill_cmd(cmd, O_IPTTL, 0, strtoul(*av, NULL, 0));
4345                         av++;
4346                         break;
4347
4348                 case TOK_IPID:
4349                         NEED1("ipid requires id");
4350                         if (strpbrk(*av, "-,")) {
4351                             if (!add_ports(cmd, *av, 0, O_IPID, cblen))
4352                                 errx(EX_DATAERR, "invalid ipid %s", *av);
4353                         } else
4354                             fill_cmd(cmd, O_IPID, 0, strtoul(*av, NULL, 0));
4355                         av++;
4356                         break;
4357
4358                 case TOK_IPLEN:
4359                         NEED1("iplen requires length");
4360                         if (strpbrk(*av, "-,")) {
4361                             if (!add_ports(cmd, *av, 0, O_IPLEN, cblen))
4362                                 errx(EX_DATAERR, "invalid ip len %s", *av);
4363                         } else
4364                             fill_cmd(cmd, O_IPLEN, 0, strtoul(*av, NULL, 0));
4365                         av++;
4366                         break;
4367
4368                 case TOK_IPVER:
4369                         NEED1("ipver requires version");
4370                         fill_cmd(cmd, O_IPVER, 0, strtoul(*av, NULL, 0));
4371                         av++;
4372                         break;
4373
4374                 case TOK_IPPRECEDENCE:
4375                         NEED1("ipprecedence requires value");
4376                         fill_cmd(cmd, O_IPPRECEDENCE, 0,
4377                             (strtoul(*av, NULL, 0) & 7) << 5);
4378                         av++;
4379                         break;
4380
4381                 case TOK_DSCP:
4382                         NEED1("missing DSCP code");
4383                         fill_dscp(cmd, *av, cblen);
4384                         av++;
4385                         break;
4386
4387                 case TOK_IPOPTS:
4388                         NEED1("missing argument for ipoptions");
4389                         fill_flags_cmd(cmd, O_IPOPT, f_ipopts, *av);
4390                         av++;
4391                         break;
4392
4393                 case TOK_IPTOS:
4394                         NEED1("missing argument for iptos");
4395                         fill_flags_cmd(cmd, O_IPTOS, f_iptos, *av);
4396                         av++;
4397                         break;
4398
4399                 case TOK_UID:
4400                         NEED1("uid requires argument");
4401                     {
4402                         char *end;
4403                         uid_t uid;
4404                         struct passwd *pwd;
4405
4406                         cmd->opcode = O_UID;
4407                         uid = strtoul(*av, &end, 0);
4408                         pwd = (*end == '\0') ? getpwuid(uid) : getpwnam(*av);
4409                         if (pwd == NULL)
4410                                 errx(EX_DATAERR, "uid \"%s\" nonexistent", *av);
4411                         cmd32->d[0] = pwd->pw_uid;
4412                         cmd->len |= F_INSN_SIZE(ipfw_insn_u32);
4413                         av++;
4414                     }
4415                         break;
4416
4417                 case TOK_GID:
4418                         NEED1("gid requires argument");
4419                     {
4420                         char *end;
4421                         gid_t gid;
4422                         struct group *grp;
4423
4424                         cmd->opcode = O_GID;
4425                         gid = strtoul(*av, &end, 0);
4426                         grp = (*end == '\0') ? getgrgid(gid) : getgrnam(*av);
4427                         if (grp == NULL)
4428                                 errx(EX_DATAERR, "gid \"%s\" nonexistent", *av);
4429                         cmd32->d[0] = grp->gr_gid;
4430                         cmd->len |= F_INSN_SIZE(ipfw_insn_u32);
4431                         av++;
4432                     }
4433                         break;
4434
4435                 case TOK_JAIL:
4436                         NEED1("jail requires argument");
4437                     {
4438                         char *end;
4439                         int jid;
4440
4441                         cmd->opcode = O_JAIL;
4442                         jid = (int)strtol(*av, &end, 0);
4443                         if (jid < 0 || *end != '\0')
4444                                 errx(EX_DATAERR, "jail requires prison ID");
4445                         cmd32->d[0] = (uint32_t)jid;
4446                         cmd->len |= F_INSN_SIZE(ipfw_insn_u32);
4447                         av++;
4448                     }
4449                         break;
4450
4451                 case TOK_ESTAB:
4452                         fill_cmd(cmd, O_ESTAB, 0, 0);
4453                         break;
4454
4455                 case TOK_SETUP:
4456                         fill_cmd(cmd, O_TCPFLAGS, 0,
4457                                 (TH_SYN) | ( (TH_ACK) & 0xff) <<8 );
4458                         break;
4459
4460                 case TOK_TCPDATALEN:
4461                         NEED1("tcpdatalen requires length");
4462                         if (strpbrk(*av, "-,")) {
4463                             if (!add_ports(cmd, *av, 0, O_TCPDATALEN, cblen))
4464                                 errx(EX_DATAERR, "invalid tcpdata len %s", *av);
4465                         } else
4466                             fill_cmd(cmd, O_TCPDATALEN, 0,
4467                                     strtoul(*av, NULL, 0));
4468                         av++;
4469                         break;
4470
4471                 case TOK_TCPOPTS:
4472                         NEED1("missing argument for tcpoptions");
4473                         fill_flags_cmd(cmd, O_TCPOPTS, f_tcpopts, *av);
4474                         av++;
4475                         break;
4476
4477                 case TOK_TCPSEQ:
4478                 case TOK_TCPACK:
4479                         NEED1("tcpseq/tcpack requires argument");
4480                         cmd->len = F_INSN_SIZE(ipfw_insn_u32);
4481                         cmd->opcode = (i == TOK_TCPSEQ) ? O_TCPSEQ : O_TCPACK;
4482                         cmd32->d[0] = htonl(strtoul(*av, NULL, 0));
4483                         av++;
4484                         break;
4485
4486                 case TOK_TCPWIN:
4487                         NEED1("tcpwin requires length");
4488                         if (strpbrk(*av, "-,")) {
4489                             if (!add_ports(cmd, *av, 0, O_TCPWIN, cblen))
4490                                 errx(EX_DATAERR, "invalid tcpwin len %s", *av);
4491                         } else
4492                             fill_cmd(cmd, O_TCPWIN, 0,
4493                                     strtoul(*av, NULL, 0));
4494                         av++;
4495                         break;
4496
4497                 case TOK_TCPFLAGS:
4498                         NEED1("missing argument for tcpflags");
4499                         cmd->opcode = O_TCPFLAGS;
4500                         fill_flags_cmd(cmd, O_TCPFLAGS, f_tcpflags, *av);
4501                         av++;
4502                         break;
4503
4504                 case TOK_KEEPSTATE:
4505                         if (open_par)
4506                                 errx(EX_USAGE, "keep-state cannot be part "
4507                                     "of an or block");
4508                         if (have_state)
4509                                 errx(EX_USAGE, "only one of keep-state "
4510                                         "and limit is allowed");
4511                         have_state = cmd;
4512                         fill_cmd(cmd, O_KEEP_STATE, 0, 0);
4513                         break;
4514
4515                 case TOK_LIMIT: {
4516                         ipfw_insn_limit *c = (ipfw_insn_limit *)cmd;
4517                         int val;
4518
4519                         if (open_par)
4520                                 errx(EX_USAGE,
4521                                     "limit cannot be part of an or block");
4522                         if (have_state)
4523                                 errx(EX_USAGE, "only one of keep-state and "
4524                                     "limit is allowed");
4525                         have_state = cmd;
4526
4527                         cmd->len = F_INSN_SIZE(ipfw_insn_limit);
4528                         CHECK_CMDLEN;
4529                         cmd->opcode = O_LIMIT;
4530                         c->limit_mask = c->conn_limit = 0;
4531
4532                         while ( av[0] != NULL ) {
4533                                 if ((val = match_token(limit_masks, *av)) <= 0)
4534                                         break;
4535                                 c->limit_mask |= val;
4536                                 av++;
4537                         }
4538
4539                         if (c->limit_mask == 0)
4540                                 errx(EX_USAGE, "limit: missing limit mask");
4541
4542                         GET_UINT_ARG(c->conn_limit, IPFW_ARG_MIN, IPFW_ARG_MAX,
4543                             TOK_LIMIT, rule_options);
4544
4545                         av++;
4546                         break;
4547                 }
4548
4549                 case TOK_PROTO:
4550                         NEED1("missing protocol");
4551                         if (add_proto(cmd, *av, &proto)) {
4552                                 av++;
4553                         } else
4554                                 errx(EX_DATAERR, "invalid protocol ``%s''",
4555                                     *av);
4556                         break;
4557
4558                 case TOK_SRCIP:
4559                         NEED1("missing source IP");
4560                         if (add_srcip(cmd, *av, cblen, tstate)) {
4561                                 av++;
4562                         }
4563                         break;
4564
4565                 case TOK_DSTIP:
4566                         NEED1("missing destination IP");
4567                         if (add_dstip(cmd, *av, cblen, tstate)) {
4568                                 av++;
4569                         }
4570                         break;
4571
4572                 case TOK_SRCIP6:
4573                         NEED1("missing source IP6");
4574                         if (add_srcip6(cmd, *av, cblen)) {
4575                                 av++;
4576                         }
4577                         break;
4578
4579                 case TOK_DSTIP6:
4580                         NEED1("missing destination IP6");
4581                         if (add_dstip6(cmd, *av, cblen)) {
4582                                 av++;
4583                         }
4584                         break;
4585
4586                 case TOK_SRCPORT:
4587                         NEED1("missing source port");
4588                         if (_substrcmp(*av, "any") == 0 ||
4589                             add_ports(cmd, *av, proto, O_IP_SRCPORT, cblen)) {
4590                                 av++;
4591                         } else
4592                                 errx(EX_DATAERR, "invalid source port %s", *av);
4593                         break;
4594
4595                 case TOK_DSTPORT:
4596                         NEED1("missing destination port");
4597                         if (_substrcmp(*av, "any") == 0 ||
4598                             add_ports(cmd, *av, proto, O_IP_DSTPORT, cblen)) {
4599                                 av++;
4600                         } else
4601                                 errx(EX_DATAERR, "invalid destination port %s",
4602                                     *av);
4603                         break;
4604
4605                 case TOK_MAC:
4606                         if (add_mac(cmd, av, cblen))
4607                                 av += 2;
4608                         break;
4609
4610                 case TOK_MACTYPE:
4611                         NEED1("missing mac type");
4612                         if (!add_mactype(cmd, *av, cblen))
4613                                 errx(EX_DATAERR, "invalid mac type %s", *av);
4614                         av++;
4615                         break;
4616
4617                 case TOK_VERREVPATH:
4618                         fill_cmd(cmd, O_VERREVPATH, 0, 0);
4619                         break;
4620
4621                 case TOK_VERSRCREACH:
4622                         fill_cmd(cmd, O_VERSRCREACH, 0, 0);
4623                         break;
4624
4625                 case TOK_ANTISPOOF:
4626                         fill_cmd(cmd, O_ANTISPOOF, 0, 0);
4627                         break;
4628
4629                 case TOK_IPSEC:
4630                         fill_cmd(cmd, O_IPSEC, 0, 0);
4631                         break;
4632
4633                 case TOK_IPV6:
4634                         fill_cmd(cmd, O_IP6, 0, 0);
4635                         break;
4636
4637                 case TOK_IPV4:
4638                         fill_cmd(cmd, O_IP4, 0, 0);
4639                         break;
4640
4641                 case TOK_EXT6HDR:
4642                         fill_ext6hdr( cmd, *av );
4643                         av++;
4644                         break;
4645
4646                 case TOK_FLOWID:
4647                         if (proto != IPPROTO_IPV6 )
4648                                 errx( EX_USAGE, "flow-id filter is active "
4649                                     "only for ipv6 protocol\n");
4650                         fill_flow6( (ipfw_insn_u32 *) cmd, *av, cblen);
4651                         av++;
4652                         break;
4653
4654                 case TOK_COMMENT:
4655                         fill_comment(cmd, av, cblen);
4656                         av[0]=NULL;
4657                         break;
4658
4659                 case TOK_TAGGED:
4660                         if (av[0] && strpbrk(*av, "-,")) {
4661                                 if (!add_ports(cmd, *av, 0, O_TAGGED, cblen))
4662                                         errx(EX_DATAERR, "tagged: invalid tag"
4663                                             " list: %s", *av);
4664                         }
4665                         else {
4666                                 uint16_t tag;
4667
4668                                 GET_UINT_ARG(tag, IPFW_ARG_MIN, IPFW_ARG_MAX,
4669                                     TOK_TAGGED, rule_options);
4670                                 fill_cmd(cmd, O_TAGGED, 0, tag);
4671                         }
4672                         av++;
4673                         break;
4674
4675                 case TOK_FIB:
4676                         NEED1("fib requires fib number");
4677                         fill_cmd(cmd, O_FIB, 0, strtoul(*av, NULL, 0));
4678                         av++;
4679                         break;
4680                 case TOK_SOCKARG:
4681                         fill_cmd(cmd, O_SOCKARG, 0, 0);
4682                         break;
4683
4684                 case TOK_LOOKUP: {
4685                         ipfw_insn_u32 *c = (ipfw_insn_u32 *)cmd;
4686                         int j;
4687
4688                         if (!av[0] || !av[1])
4689                                 errx(EX_USAGE, "format: lookup argument tablenum");
4690                         cmd->opcode = O_IP_DST_LOOKUP;
4691                         cmd->len |= F_INSN_SIZE(ipfw_insn) + 2;
4692                         i = match_token(rule_options, *av);
4693                         for (j = 0; lookup_key[j] >= 0 ; j++) {
4694                                 if (i == lookup_key[j])
4695                                         break;
4696                         }
4697                         if (lookup_key[j] <= 0)
4698                                 errx(EX_USAGE, "format: cannot lookup on %s", *av);
4699                         __PAST_END(c->d, 1) = j; // i converted to option
4700                         av++;
4701
4702                         if ((j = pack_table(tstate, *av)) == 0)
4703                                 errx(EX_DATAERR, "Invalid table name: %s", *av);
4704
4705                         cmd->arg1 = j;
4706                         av++;
4707                     }
4708                         break;
4709                 case TOK_FLOW:
4710                         NEED1("missing table name");
4711                         if (strncmp(*av, "table(", 6) != 0)
4712                                 errx(EX_DATAERR,
4713                                     "enclose table name into \"table()\"");
4714                         fill_table(cmd, *av, O_IP_FLOW_LOOKUP, tstate);
4715                         av++;
4716                         break;
4717
4718                 default:
4719                         errx(EX_USAGE, "unrecognised option [%d] %s\n", i, s);
4720                 }
4721                 if (F_LEN(cmd) > 0) {   /* prepare to advance */
4722                         prev = cmd;
4723                         cmd = next_cmd(cmd, &cblen);
4724                 }
4725         }
4726
4727 done:
4728         /*
4729          * Now copy stuff into the rule.
4730          * If we have a keep-state option, the first instruction
4731          * must be a PROBE_STATE (which is generated here).
4732          * If we have a LOG option, it was stored as the first command,
4733          * and now must be moved to the top of the action part.
4734          */
4735         dst = (ipfw_insn *)rule->cmd;
4736
4737         /*
4738          * First thing to write into the command stream is the match probability.
4739          */
4740         if (match_prob != 1) { /* 1 means always match */
4741                 dst->opcode = O_PROB;
4742                 dst->len = 2;
4743                 *((int32_t *)(dst+1)) = (int32_t)(match_prob * 0x7fffffff);
4744                 dst += dst->len;
4745         }
4746
4747         /*
4748          * generate O_PROBE_STATE if necessary
4749          */
4750         if (have_state && have_state->opcode != O_CHECK_STATE) {
4751                 fill_cmd(dst, O_PROBE_STATE, 0, 0);
4752                 dst = next_cmd(dst, &rblen);
4753         }
4754
4755         /* copy all commands but O_LOG, O_KEEP_STATE, O_LIMIT, O_ALTQ, O_TAG */
4756         for (src = (ipfw_insn *)cmdbuf; src != cmd; src += i) {
4757                 i = F_LEN(src);
4758                 CHECK_RBUFLEN(i);
4759
4760                 switch (src->opcode) {
4761                 case O_LOG:
4762                 case O_KEEP_STATE:
4763                 case O_LIMIT:
4764                 case O_ALTQ:
4765                 case O_TAG:
4766                         break;
4767                 default:
4768                         bcopy(src, dst, i * sizeof(uint32_t));
4769                         dst += i;
4770                 }
4771         }
4772
4773         /*
4774          * put back the have_state command as last opcode
4775          */
4776         if (have_state && have_state->opcode != O_CHECK_STATE) {
4777                 i = F_LEN(have_state);
4778                 CHECK_RBUFLEN(i);
4779                 bcopy(have_state, dst, i * sizeof(uint32_t));
4780                 dst += i;
4781         }
4782         /*
4783          * start action section
4784          */
4785         rule->act_ofs = dst - rule->cmd;
4786
4787         /* put back O_LOG, O_ALTQ, O_TAG if necessary */
4788         if (have_log) {
4789                 i = F_LEN(have_log);
4790                 CHECK_RBUFLEN(i);
4791                 bcopy(have_log, dst, i * sizeof(uint32_t));
4792                 dst += i;
4793         }
4794         if (have_altq) {
4795                 i = F_LEN(have_altq);
4796                 CHECK_RBUFLEN(i);
4797                 bcopy(have_altq, dst, i * sizeof(uint32_t));
4798                 dst += i;
4799         }
4800         if (have_tag) {
4801                 i = F_LEN(have_tag);
4802                 CHECK_RBUFLEN(i);
4803                 bcopy(have_tag, dst, i * sizeof(uint32_t));
4804                 dst += i;
4805         }
4806
4807         /*
4808          * copy all other actions
4809          */
4810         for (src = (ipfw_insn *)actbuf; src != action; src += i) {
4811                 i = F_LEN(src);
4812                 CHECK_RBUFLEN(i);
4813                 bcopy(src, dst, i * sizeof(uint32_t));
4814                 dst += i;
4815         }
4816
4817         rule->cmd_len = (uint32_t *)dst - (uint32_t *)(rule->cmd);
4818         *rbufsize = (char *)dst - (char *)rule;
4819 }
4820
4821 static int
4822 compare_ntlv(const void *_a, const void *_b)
4823 {
4824         ipfw_obj_ntlv *a, *b;
4825
4826         a = (ipfw_obj_ntlv *)_a;
4827         b = (ipfw_obj_ntlv *)_b;
4828
4829         if (a->set < b->set)
4830                 return (-1);
4831         else if (a->set > b->set)
4832                 return (1);
4833
4834         if (a->idx < b->idx)
4835                 return (-1);
4836         else if (a->idx > b->idx)
4837                 return (1);
4838
4839         if (a->head.type < b->head.type)
4840                 return (-1);
4841         else if (a->head.type > b->head.type)
4842                 return (1);
4843
4844         return (0);
4845 }
4846
4847 /*
4848  * Provide kernel with sorted list of referenced objects
4849  */
4850 static void
4851 object_sort_ctlv(ipfw_obj_ctlv *ctlv)
4852 {
4853
4854         qsort(ctlv + 1, ctlv->count, ctlv->objsize, compare_ntlv);
4855 }
4856
4857 struct object_kt {
4858         uint16_t        uidx;
4859         uint16_t        type;
4860 };
4861 static int
4862 compare_object_kntlv(const void *k, const void *v)
4863 {
4864         ipfw_obj_ntlv *ntlv;
4865         struct object_kt key;
4866
4867         key = *((struct object_kt *)k);
4868         ntlv = (ipfw_obj_ntlv *)v;
4869
4870         if (key.uidx < ntlv->idx)
4871                 return (-1);
4872         else if (key.uidx > ntlv->idx)
4873                 return (1);
4874
4875         if (key.type < ntlv->head.type)
4876                 return (-1);
4877         else if (key.type > ntlv->head.type)
4878                 return (1);
4879
4880         return (0);
4881 }
4882
4883 /*
4884  * Finds object name in @ctlv by @idx and @type.
4885  * Uses the following facts:
4886  * 1) All TLVs are the same size
4887  * 2) Kernel implementation provides already sorted list.
4888  *
4889  * Returns table name or NULL.
4890  */
4891 static char *
4892 object_search_ctlv(ipfw_obj_ctlv *ctlv, uint16_t idx, uint16_t type)
4893 {
4894         ipfw_obj_ntlv *ntlv;
4895         struct object_kt key;
4896
4897         key.uidx = idx;
4898         key.type = type;
4899
4900         ntlv = bsearch(&key, (ctlv + 1), ctlv->count, ctlv->objsize,
4901             compare_object_kntlv);
4902
4903         if (ntlv != NULL)
4904                 return (ntlv->name);
4905
4906         return (NULL);
4907 }
4908
4909 static char *
4910 table_search_ctlv(ipfw_obj_ctlv *ctlv, uint16_t idx)
4911 {
4912
4913         return (object_search_ctlv(ctlv, idx, IPFW_TLV_TBL_NAME));
4914 }
4915
4916 /*
4917  * Adds one or more rules to ipfw chain.
4918  * Data layout:
4919  * Request:
4920  * [
4921  *   ip_fw3_opheader
4922  *   [ ipfw_obj_ctlv(IPFW_TLV_TBL_LIST) ipfw_obj_ntlv x N ] (optional *1)
4923  *   [ ipfw_obj_ctlv(IPFW_TLV_RULE_LIST) [ ip_fw_rule ip_fw_insn ] x N ] (*2) (*3)
4924  * ]
4925  * Reply:
4926  * [
4927  *   ip_fw3_opheader
4928  *   [ ipfw_obj_ctlv(IPFW_TLV_TBL_LIST) ipfw_obj_ntlv x N ] (optional)
4929  *   [ ipfw_obj_ctlv(IPFW_TLV_RULE_LIST) [ ip_fw_rule ip_fw_insn ] x N ]
4930  * ]
4931  *
4932  * Rules in reply are modified to store their actual ruleset number.
4933  *
4934  * (*1) TLVs inside IPFW_TLV_TBL_LIST needs to be sorted ascending
4935  * according to their idx field and there has to be no duplicates.
4936  * (*2) Numbered rules inside IPFW_TLV_RULE_LIST needs to be sorted ascending.
4937  * (*3) Each ip_fw structure needs to be aligned to u64 boundary.
4938  */
4939 void
4940 ipfw_add(char *av[])
4941 {
4942         uint32_t rulebuf[1024];
4943         int rbufsize, default_off, tlen, rlen;
4944         size_t sz;
4945         struct tidx ts;
4946         struct ip_fw_rule *rule;
4947         caddr_t tbuf;
4948         ip_fw3_opheader *op3;
4949         ipfw_obj_ctlv *ctlv, *tstate;
4950
4951         rbufsize = sizeof(rulebuf);
4952         memset(rulebuf, 0, rbufsize);
4953         memset(&ts, 0, sizeof(ts));
4954
4955         /* Optimize case with no tables */
4956         default_off = sizeof(ipfw_obj_ctlv) + sizeof(ip_fw3_opheader);
4957         op3 = (ip_fw3_opheader *)rulebuf;
4958         ctlv = (ipfw_obj_ctlv *)(op3 + 1);
4959         rule = (struct ip_fw_rule *)(ctlv + 1);
4960         rbufsize -= default_off;
4961
4962         compile_rule(av, (uint32_t *)rule, &rbufsize, &ts);
4963         /* Align rule size to u64 boundary */
4964         rlen = roundup2(rbufsize, sizeof(uint64_t));
4965
4966         tbuf = NULL;
4967         sz = 0;
4968         tstate = NULL;
4969         if (ts.count != 0) {
4970                 /* Some tables. We have to alloc more data */
4971                 tlen = ts.count * sizeof(ipfw_obj_ntlv);
4972                 sz = default_off + sizeof(ipfw_obj_ctlv) + tlen + rlen;
4973
4974                 if ((tbuf = calloc(1, sz)) == NULL)
4975                         err(EX_UNAVAILABLE, "malloc() failed for IP_FW_ADD");
4976                 op3 = (ip_fw3_opheader *)tbuf;
4977                 /* Tables first */
4978                 ctlv = (ipfw_obj_ctlv *)(op3 + 1);
4979                 ctlv->head.type = IPFW_TLV_TBLNAME_LIST;
4980                 ctlv->head.length = sizeof(ipfw_obj_ctlv) + tlen;
4981                 ctlv->count = ts.count;
4982                 ctlv->objsize = sizeof(ipfw_obj_ntlv);
4983                 memcpy(ctlv + 1, ts.idx, tlen);
4984                 object_sort_ctlv(ctlv);
4985                 tstate = ctlv;
4986                 /* Rule next */
4987                 ctlv = (ipfw_obj_ctlv *)((caddr_t)ctlv + ctlv->head.length);
4988                 ctlv->head.type = IPFW_TLV_RULE_LIST;
4989                 ctlv->head.length = sizeof(ipfw_obj_ctlv) + rlen;
4990                 ctlv->count = 1;
4991                 memcpy(ctlv + 1, rule, rbufsize);
4992         } else {
4993                 /* Simply add header */
4994                 sz = rlen + default_off;
4995                 memset(ctlv, 0, sizeof(*ctlv));
4996                 ctlv->head.type = IPFW_TLV_RULE_LIST;
4997                 ctlv->head.length = sizeof(ipfw_obj_ctlv) + rlen;
4998                 ctlv->count = 1;
4999         }
5000
5001         if (do_get3(IP_FW_XADD, op3, &sz) != 0)
5002                 err(EX_UNAVAILABLE, "getsockopt(%s)", "IP_FW_XADD");
5003
5004         if (!co.do_quiet) {
5005                 struct format_opts sfo;
5006                 struct buf_pr bp;
5007                 memset(&sfo, 0, sizeof(sfo));
5008                 sfo.tstate = tstate;
5009                 sfo.set_mask = (uint32_t)(-1);
5010                 bp_alloc(&bp, 4096);
5011                 show_static_rule(&co, &sfo, &bp, rule, NULL);
5012                 printf("%s", bp.buf);
5013                 bp_free(&bp);
5014         }
5015
5016         if (tbuf != NULL)
5017                 free(tbuf);
5018
5019         if (ts.idx != NULL)
5020                 free(ts.idx);
5021 }
5022
5023 /*
5024  * clear the counters or the log counters.
5025  * optname has the following values:
5026  *  0 (zero both counters and logging)
5027  *  1 (zero logging only)
5028  */
5029 void
5030 ipfw_zero(int ac, char *av[], int optname)
5031 {
5032         ipfw_range_tlv rt;
5033         uint32_t arg;
5034         int failed = EX_OK;
5035         char const *errstr;
5036         char const *name = optname ? "RESETLOG" : "ZERO";
5037
5038         optname = optname ? IP_FW_XRESETLOG : IP_FW_XZERO;
5039         memset(&rt, 0, sizeof(rt));
5040
5041         av++; ac--;
5042
5043         if (ac == 0) {
5044                 /* clear all entries */
5045                 rt.flags = IPFW_RCFLAG_ALL;
5046                 if (do_range_cmd(optname, &rt) < 0)
5047                         err(EX_UNAVAILABLE, "setsockopt(IP_FW_X%s)", name);
5048                 if (!co.do_quiet)
5049                         printf("%s.\n", optname == IP_FW_XZERO ?
5050                             "Accounting cleared":"Logging counts reset");
5051
5052                 return;
5053         }
5054
5055         while (ac) {
5056                 /* Rule number */
5057                 if (isdigit(**av)) {
5058                         arg = strtonum(*av, 0, 0xffff, &errstr);
5059                         if (errstr)
5060                                 errx(EX_DATAERR,
5061                                     "invalid rule number %s\n", *av);
5062                         rt.start_rule = arg;
5063                         rt.end_rule = arg;
5064                         rt.flags |= IPFW_RCFLAG_RANGE;
5065                         if (co.use_set != 0) {
5066                                 rt.set = co.use_set - 1;
5067                                 rt.flags |= IPFW_RCFLAG_SET;
5068                         }
5069                         if (do_range_cmd(optname, &rt) != 0) {
5070                                 warn("rule %u: setsockopt(IP_FW_X%s)",
5071                                     arg, name);
5072                                 failed = EX_UNAVAILABLE;
5073                         } else if (rt.new_set == 0) {
5074                                 printf("Entry %d not found\n", arg);
5075                                 failed = EX_UNAVAILABLE;
5076                         } else if (!co.do_quiet)
5077                                 printf("Entry %d %s.\n", arg,
5078                                     optname == IP_FW_XZERO ?
5079                                         "cleared" : "logging count reset");
5080                 } else {
5081                         errx(EX_USAGE, "invalid rule number ``%s''", *av);
5082                 }
5083                 av++; ac--;
5084         }
5085         if (failed != EX_OK)
5086                 exit(failed);
5087 }
5088
5089 void
5090 ipfw_flush(int force)
5091 {
5092         ipfw_range_tlv rt;
5093
5094         if (!force && !co.do_quiet) { /* need to ask user */
5095                 int c;
5096
5097                 printf("Are you sure? [yn] ");
5098                 fflush(stdout);
5099                 do {
5100                         c = toupper(getc(stdin));
5101                         while (c != '\n' && getc(stdin) != '\n')
5102                                 if (feof(stdin))
5103                                         return; /* and do not flush */
5104                 } while (c != 'Y' && c != 'N');
5105                 printf("\n");
5106                 if (c == 'N')   /* user said no */
5107                         return;
5108         }
5109         if (co.do_pipe) {
5110                 dummynet_flush();
5111                 return;
5112         }
5113         /* `ipfw set N flush` - is the same that `ipfw delete set N` */
5114         memset(&rt, 0, sizeof(rt));
5115         if (co.use_set != 0) {
5116                 rt.set = co.use_set - 1;
5117                 rt.flags = IPFW_RCFLAG_SET;
5118         } else
5119                 rt.flags = IPFW_RCFLAG_ALL;
5120         if (do_range_cmd(IP_FW_XDEL, &rt) != 0)
5121                         err(EX_UNAVAILABLE, "setsockopt(IP_FW_XDEL)");
5122         if (!co.do_quiet)
5123                 printf("Flushed all %s.\n", co.do_pipe ? "pipes" : "rules");
5124 }
5125
5126 static struct _s_x intcmds[] = {
5127       { "talist",       TOK_TALIST },
5128       { "iflist",       TOK_IFLIST },
5129       { "olist",        TOK_OLIST },
5130       { "vlist",        TOK_VLIST },
5131       { NULL, 0 }
5132 };
5133
5134 static struct _s_x otypes[] = {
5135         { "EACTION",    IPFW_TLV_EACTION },
5136         { NULL, 0 }
5137 };
5138
5139 static const char*
5140 lookup_eaction_name(ipfw_obj_ntlv *ntlv, int cnt, uint16_t type)
5141 {
5142         const char *name;
5143         int i;
5144
5145         name = NULL;
5146         for (i = 0; i < cnt; i++) {
5147                 if (ntlv[i].head.type != IPFW_TLV_EACTION)
5148                         continue;
5149                 if (IPFW_TLV_EACTION_NAME(ntlv[i].idx) != type)
5150                         continue;
5151                 name = ntlv[i].name;
5152                 break;
5153         }
5154         return (name);
5155 }
5156
5157 static void
5158 ipfw_list_objects(int ac, char *av[])
5159 {
5160         ipfw_obj_lheader req, *olh;
5161         ipfw_obj_ntlv *ntlv;
5162         const char *name;
5163         size_t sz;
5164         int i;
5165
5166         memset(&req, 0, sizeof(req));
5167         sz = sizeof(req);
5168         if (do_get3(IP_FW_DUMP_SRVOBJECTS, &req.opheader, &sz) != 0)
5169                 if (errno != ENOMEM)
5170                         return;
5171
5172         sz = req.size;
5173         if ((olh = calloc(1, sz)) == NULL)
5174                 return;
5175
5176         olh->size = sz;
5177         if (do_get3(IP_FW_DUMP_SRVOBJECTS, &olh->opheader, &sz) != 0) {
5178                 free(olh);
5179                 return;
5180         }
5181
5182         if (olh->count > 0)
5183                 printf("Objects list:\n");
5184         else
5185                 printf("There are no objects\n");
5186         ntlv = (ipfw_obj_ntlv *)(olh + 1);
5187         for (i = 0; i < olh->count; i++) {
5188                 name = match_value(otypes, ntlv->head.type);
5189                 if (name == NULL)
5190                         name = lookup_eaction_name(
5191                             (ipfw_obj_ntlv *)(olh + 1), olh->count,
5192                             ntlv->head.type);
5193                 if (name == NULL)
5194                         printf(" kidx: %4d\ttype: %10d\tname: %s\n",
5195                             ntlv->idx, ntlv->head.type, ntlv->name);
5196                 else
5197                         printf(" kidx: %4d\ttype: %10s\tname: %s\n",
5198                             ntlv->idx, name, ntlv->name);
5199                 ntlv++;
5200         }
5201         free(olh);
5202 }
5203
5204 void
5205 ipfw_internal_handler(int ac, char *av[])
5206 {
5207         int tcmd;
5208
5209         ac--; av++;
5210         NEED1("internal cmd required");
5211
5212         if ((tcmd = match_token(intcmds, *av)) == -1)
5213                 errx(EX_USAGE, "invalid internal sub-cmd: %s", *av);
5214
5215         switch (tcmd) {
5216         case TOK_IFLIST:
5217                 ipfw_list_tifaces();
5218                 break;
5219         case TOK_TALIST:
5220                 ipfw_list_ta(ac, av);
5221                 break;
5222         case TOK_OLIST:
5223                 ipfw_list_objects(ac, av);
5224                 break;
5225         case TOK_VLIST:
5226                 ipfw_list_values(ac, av);
5227                 break;
5228         }
5229 }
5230
5231 static int
5232 ipfw_get_tracked_ifaces(ipfw_obj_lheader **polh)
5233 {
5234         ipfw_obj_lheader req, *olh;
5235         size_t sz;
5236
5237         memset(&req, 0, sizeof(req));
5238         sz = sizeof(req);
5239
5240         if (do_get3(IP_FW_XIFLIST, &req.opheader, &sz) != 0) {
5241                 if (errno != ENOMEM)
5242                         return (errno);
5243         }
5244
5245         sz = req.size;
5246         if ((olh = calloc(1, sz)) == NULL)
5247                 return (ENOMEM);
5248
5249         olh->size = sz;
5250         if (do_get3(IP_FW_XIFLIST, &olh->opheader, &sz) != 0) {
5251                 free(olh);
5252                 return (errno);
5253         }
5254
5255         *polh = olh;
5256         return (0);
5257 }
5258
5259 static int
5260 ifinfo_cmp(const void *a, const void *b)
5261 {
5262         ipfw_iface_info *ia, *ib;
5263
5264         ia = (ipfw_iface_info *)a;
5265         ib = (ipfw_iface_info *)b;
5266
5267         return (stringnum_cmp(ia->ifname, ib->ifname));
5268 }
5269
5270 /*
5271  * Retrieves table list from kernel,
5272  * optionally sorts it and calls requested function for each table.
5273  * Returns 0 on success.
5274  */
5275 static void
5276 ipfw_list_tifaces()
5277 {
5278         ipfw_obj_lheader *olh;
5279         ipfw_iface_info *info;
5280         int i, error;
5281
5282         if ((error = ipfw_get_tracked_ifaces(&olh)) != 0)
5283                 err(EX_OSERR, "Unable to request ipfw tracked interface list");
5284
5285
5286         qsort(olh + 1, olh->count, olh->objsize, ifinfo_cmp);
5287
5288         info = (ipfw_iface_info *)(olh + 1);
5289         for (i = 0; i < olh->count; i++) {
5290                 if (info->flags & IPFW_IFFLAG_RESOLVED)
5291                         printf("%s ifindex: %d refcount: %u changes: %u\n",
5292                             info->ifname, info->ifindex, info->refcnt,
5293                             info->gencnt);
5294                 else
5295                         printf("%s ifindex: unresolved refcount: %u changes: %u\n",
5296                             info->ifname, info->refcnt, info->gencnt);
5297                 info = (ipfw_iface_info *)((caddr_t)info + olh->objsize);
5298         }
5299
5300         free(olh);
5301 }
5302
5303
5304
5305