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 <jail.h>
  36 #include <netdb.h>
  37 #include <pwd.h>
  38 #include <stdio.h>
  39 #include <stdarg.h>
  40 #include <stdint.h>
  41 #include <stdlib.h>
  42 #include <string.h>
  43 #include <sysexits.h>
  44 #include <time.h>       /* ctime */
  45 #include <timeconv.h>   /* _long_to_time */
  46 #include <unistd.h>
  47 #include <fcntl.h>
  48 #include <stddef.h>     /* offsetof */
  49
  50 #include <net/ethernet.h>
  51 #include <net/if.h>             /* only IFNAMSIZ */
  52 #include <netinet/in.h>
  53 #include <netinet/in_systm.h>   /* only n_short, n_long */
  54 #include <netinet/ip.h>
  55 #include <netinet/ip_icmp.h>
  56 #include <netinet/ip_fw.h>
  57 #include <netinet/tcp.h>
  58 #include <arpa/inet.h>
  59
  60 struct cmdline_opts g_co;       /* global options */
  61
  62 struct format_opts {
  63         int bcwidth;
  64         int pcwidth;
  65         int show_counters;
  66         int show_time;          /* show timestamp */
  67         uint32_t set_mask;      /* enabled sets mask */
  68         uint32_t flags;         /* request flags */
  69         uint32_t first;         /* first rule to request */
  70         uint32_t last;          /* last rule to request */
  71         uint32_t dcnt;          /* number of dynamic states */
  72         ipfw_obj_ctlv *tstate;  /* table state data */
  73 };
  74
  75 int resvd_set_number = RESVD_SET;
  76
  77 static int ipfw_socket = -1;
  78
  79 #define CHECK_LENGTH(v, len) do {                               \
  80         if ((v) < (len))                                        \
  81                 errx(EX_DATAERR, "Rule too long");              \
  82         } while (0)
  83 /*
  84  * Check if we have enough space in cmd buffer. Note that since
  85  * first 8? u32 words are reserved by reserved header, full cmd
  86  * buffer can't be used, so we need to protect from buffer overrun
  87  * only. At the beginning, cblen is less than actual buffer size by
  88  * size of ipfw_insn_u32 instruction + 1 u32 work. This eliminates need
  89  * for checking small instructions fitting in given range.
  90  * We also (ab)use the fact that ipfw_insn is always the first field
  91  * for any custom instruction.
  92  */
  93 #define CHECK_CMDLEN    CHECK_LENGTH(cblen, F_LEN((ipfw_insn *)cmd))
  94
  95 #define GET_UINT_ARG(arg, min, max, tok, s_x) do {                      \
  96         if (!av[0])                                                     \
  97                 errx(EX_USAGE, "%s: missing argument", match_value(s_x, tok)); \
  98         if (_substrcmp(*av, "tablearg") == 0) {                         \
  99                 arg = IP_FW_TARG;                                       \
 100                 break;                                                  \
 101         }                                                               \
 102                                                                         \
 103         {                                                               \
 104         long _xval;                                                     \
 105         char *end;                                                      \
 106                                                                         \
 107         _xval = strtol(*av, &end, 10);                                  \
 108                                                                         \
 109         if (!isdigit(**av) || *end != '\0' || (_xval == 0 && errno == EINVAL)) \
 110                 errx(EX_DATAERR, "%s: invalid argument: %s",            \
 111                     match_value(s_x, tok), *av);                        \
 112                                                                         \
 113         if (errno == ERANGE || _xval < min || _xval > max)              \
 114                 errx(EX_DATAERR, "%s: argument is out of range (%u..%u): %s", \
 115                     match_value(s_x, tok), min, max, *av);              \
 116                                                                         \
 117         if (_xval == IP_FW_TARG)                                        \
 118                 errx(EX_DATAERR, "%s: illegal argument value: %s",      \
 119                     match_value(s_x, tok), *av);                        \
 120         arg = _xval;                                                    \
 121         }                                                               \
 122 } while (0)
 123
 124 static struct _s_x f_tcpflags[] = {
 125         { "syn", TH_SYN },
 126         { "fin", TH_FIN },
 127         { "ack", TH_ACK },
 128         { "psh", TH_PUSH },
 129         { "rst", TH_RST },
 130         { "urg", TH_URG },
 131         { "tcp flag", 0 },
 132         { NULL, 0 }
 133 };
 134
 135 static struct _s_x f_tcpopts[] = {
 136         { "mss",        IP_FW_TCPOPT_MSS },
 137         { "maxseg",     IP_FW_TCPOPT_MSS },
 138         { "window",     IP_FW_TCPOPT_WINDOW },
 139         { "sack",       IP_FW_TCPOPT_SACK },
 140         { "ts",         IP_FW_TCPOPT_TS },
 141         { "timestamp",  IP_FW_TCPOPT_TS },
 142         { "cc",         IP_FW_TCPOPT_CC },
 143         { "tcp option", 0 },
 144         { NULL, 0 }
 145 };
 146
 147 /*
 148  * IP options span the range 0 to 255 so we need to remap them
 149  * (though in fact only the low 5 bits are significant).
 150  */
 151 static struct _s_x f_ipopts[] = {
 152         { "ssrr",       IP_FW_IPOPT_SSRR},
 153         { "lsrr",       IP_FW_IPOPT_LSRR},
 154         { "rr",         IP_FW_IPOPT_RR},
 155         { "ts",         IP_FW_IPOPT_TS},
 156         { "ip option",  0 },
 157         { NULL, 0 }
 158 };
 159
 160 static struct _s_x f_iptos[] = {
 161         { "lowdelay",   IPTOS_LOWDELAY},
 162         { "throughput", IPTOS_THROUGHPUT},
 163         { "reliability", IPTOS_RELIABILITY},
 164         { "mincost",    IPTOS_MINCOST},
 165         { "congestion", IPTOS_ECN_CE},
 166         { "ecntransport", IPTOS_ECN_ECT0},
 167         { "ip tos option", 0},
 168         { NULL, 0 }
 169 };
 170
 171 static struct _s_x f_ipoff[] = {
 172         { "rf", IP_RF >> 8 },
 173         { "df", IP_DF >> 8 },
 174         { "mf", IP_MF >> 8 },
 175         { "offset", 0x1 },
 176         { NULL, 0}
 177 };
 178
 179 struct _s_x f_ipdscp[] = {
 180         { "af11", IPTOS_DSCP_AF11 >> 2 },       /* 001010 */
 181         { "af12", IPTOS_DSCP_AF12 >> 2 },       /* 001100 */
 182         { "af13", IPTOS_DSCP_AF13 >> 2 },       /* 001110 */
 183         { "af21", IPTOS_DSCP_AF21 >> 2 },       /* 010010 */
 184         { "af22", IPTOS_DSCP_AF22 >> 2 },       /* 010100 */
 185         { "af23", IPTOS_DSCP_AF23 >> 2 },       /* 010110 */
 186         { "af31", IPTOS_DSCP_AF31 >> 2 },       /* 011010 */
 187         { "af32", IPTOS_DSCP_AF32 >> 2 },       /* 011100 */
 188         { "af33", IPTOS_DSCP_AF33 >> 2 },       /* 011110 */
 189         { "af41", IPTOS_DSCP_AF41 >> 2 },       /* 100010 */
 190         { "af42", IPTOS_DSCP_AF42 >> 2 },       /* 100100 */
 191         { "af43", IPTOS_DSCP_AF43 >> 2 },       /* 100110 */
 192         { "be", IPTOS_DSCP_CS0 >> 2 },  /* 000000 */
 193         { "va", IPTOS_DSCP_VA >> 2 },   /* 101100 */
 194         { "ef", IPTOS_DSCP_EF >> 2 },   /* 101110 */
 195         { "cs0", IPTOS_DSCP_CS0 >> 2 }, /* 000000 */
 196         { "cs1", IPTOS_DSCP_CS1 >> 2 }, /* 001000 */
 197         { "cs2", IPTOS_DSCP_CS2 >> 2 }, /* 010000 */
 198         { "cs3", IPTOS_DSCP_CS3 >> 2 }, /* 011000 */
 199         { "cs4", IPTOS_DSCP_CS4 >> 2 }, /* 100000 */
 200         { "cs5", IPTOS_DSCP_CS5 >> 2 }, /* 101000 */
 201         { "cs6", IPTOS_DSCP_CS6 >> 2 }, /* 110000 */
 202         { "cs7", IPTOS_DSCP_CS7 >> 2 }, /* 100000 */
 203         { NULL, 0 }
 204 };
 205
 206 static struct _s_x limit_masks[] = {
 207         {"all",         DYN_SRC_ADDR|DYN_SRC_PORT|DYN_DST_ADDR|DYN_DST_PORT},
 208         {"src-addr",    DYN_SRC_ADDR},
 209         {"src-port",    DYN_SRC_PORT},
 210         {"dst-addr",    DYN_DST_ADDR},
 211         {"dst-port",    DYN_DST_PORT},
 212         {NULL,          0}
 213 };
 214
 215 /*
 216  * we use IPPROTO_ETHERTYPE as a fake protocol id to call the print routines
 217  * This is only used in this code.
 218  */
 219 #define IPPROTO_ETHERTYPE       0x1000
 220 static struct _s_x ether_types[] = {
 221     /*
 222      * Note, we cannot use "-:&/" in the names because they are field
 223      * separators in the type specifications. Also, we use s = NULL as
 224      * end-delimiter, because a type of 0 can be legal.
 225      */
 226         { "ip",         0x0800 },
 227         { "ipv4",       0x0800 },
 228         { "ipv6",       0x86dd },
 229         { "arp",        0x0806 },
 230         { "rarp",       0x8035 },
 231         { "vlan",       0x8100 },
 232         { "loop",       0x9000 },
 233         { "trail",      0x1000 },
 234         { "at",         0x809b },
 235         { "atalk",      0x809b },
 236         { "aarp",       0x80f3 },
 237         { "pppoe_disc", 0x8863 },
 238         { "pppoe_sess", 0x8864 },
 239         { "ipx_8022",   0x00E0 },
 240         { "ipx_8023",   0x0000 },
 241         { "ipx_ii",     0x8137 },
 242         { "ipx_snap",   0x8137 },
 243         { "ipx",        0x8137 },
 244         { "ns",         0x0600 },
 245         { NULL,         0 }
 246 };
 247
 248 static struct _s_x rule_eactions[] = {
 249         { "nat64clat",          TOK_NAT64CLAT },
 250         { "nat64lsn",           TOK_NAT64LSN },
 251         { "nat64stl",           TOK_NAT64STL },
 252         { "nptv6",              TOK_NPTV6 },
 253         { "tcp-setmss",         TOK_TCPSETMSS },
 254         { NULL, 0 }     /* terminator */
 255 };
 256
 257 static struct _s_x rule_actions[] = {
 258         { "abort6",             TOK_ABORT6 },
 259         { "abort",              TOK_ABORT },
 260         { "accept",             TOK_ACCEPT },
 261         { "pass",               TOK_ACCEPT },
 262         { "allow",              TOK_ACCEPT },
 263         { "permit",             TOK_ACCEPT },
 264         { "count",              TOK_COUNT },
 265         { "pipe",               TOK_PIPE },
 266         { "queue",              TOK_QUEUE },
 267         { "divert",             TOK_DIVERT },
 268         { "tee",                TOK_TEE },
 269         { "netgraph",           TOK_NETGRAPH },
 270         { "ngtee",              TOK_NGTEE },
 271         { "fwd",                TOK_FORWARD },
 272         { "forward",            TOK_FORWARD },
 273         { "skipto",             TOK_SKIPTO },
 274         { "deny",               TOK_DENY },
 275         { "drop",               TOK_DENY },
 276         { "reject",             TOK_REJECT },
 277         { "reset6",             TOK_RESET6 },
 278         { "reset",              TOK_RESET },
 279         { "unreach6",           TOK_UNREACH6 },
 280         { "unreach",            TOK_UNREACH },
 281         { "check-state",        TOK_CHECKSTATE },
 282         { "//",                 TOK_COMMENT },
 283         { "nat",                TOK_NAT },
 284         { "reass",              TOK_REASS },
 285         { "setfib",             TOK_SETFIB },
 286         { "setdscp",            TOK_SETDSCP },
 287         { "call",               TOK_CALL },
 288         { "return",             TOK_RETURN },
 289         { "eaction",            TOK_EACTION },
 290         { "tcp-setmss",         TOK_TCPSETMSS },
 291         { "setmark",            TOK_SETMARK },
 292         { NULL, 0 }     /* terminator */
 293 };
 294
 295 static struct _s_x rule_action_params[] = {
 296         { "altq",               TOK_ALTQ },
 297         { "log",                TOK_LOG },
 298         { "tag",                TOK_TAG },
 299         { "untag",              TOK_UNTAG },
 300         { NULL, 0 }     /* terminator */
 301 };
 302
 303 /*
 304  * The 'lookup' instruction accepts one of the following arguments.
 305  * Arguments are passed as v[1] in O_DST_LOOKUP options.
 306  */
 307 static struct _s_x lookup_keys[] = {
 308         { "dst-ip",             LOOKUP_DST_IP },
 309         { "src-ip",             LOOKUP_SRC_IP },
 310         { "dst-port",           LOOKUP_DST_PORT },
 311         { "src-port",           LOOKUP_SRC_PORT },
 312         { "dst-mac",            LOOKUP_DST_MAC },
 313         { "src-mac",            LOOKUP_SRC_MAC },
 314         { "uid",                LOOKUP_UID },
 315         { "jail",               LOOKUP_JAIL },
 316         { "dscp",               LOOKUP_DSCP },
 317         { "mark",               LOOKUP_MARK },
 318         { NULL,                 0 },
 319 };
 320
 321 static struct _s_x rule_options[] = {
 322         { "tagged",             TOK_TAGGED },
 323         { "uid",                TOK_UID },
 324         { "gid",                TOK_GID },
 325         { "jail",               TOK_JAIL },
 326         { "in",                 TOK_IN },
 327         { "limit",              TOK_LIMIT },
 328         { "set-limit",          TOK_SETLIMIT },
 329         { "keep-state",         TOK_KEEPSTATE },
 330         { "record-state",       TOK_RECORDSTATE },
 331         { "bridged",            TOK_LAYER2 },
 332         { "layer2",             TOK_LAYER2 },
 333         { "out",                TOK_OUT },
 334         { "diverted",           TOK_DIVERTED },
 335         { "diverted-loopback",  TOK_DIVERTEDLOOPBACK },
 336         { "diverted-output",    TOK_DIVERTEDOUTPUT },
 337         { "xmit",               TOK_XMIT },
 338         { "recv",               TOK_RECV },
 339         { "via",                TOK_VIA },
 340         { "fragment",           TOK_FRAG },
 341         { "frag",               TOK_FRAG },
 342         { "fib",                TOK_FIB },
 343         { "ipoptions",          TOK_IPOPTS },
 344         { "ipopts",             TOK_IPOPTS },
 345         { "iplen",              TOK_IPLEN },
 346         { "ipid",               TOK_IPID },
 347         { "ipprecedence",       TOK_IPPRECEDENCE },
 348         { "dscp",               TOK_DSCP },
 349         { "iptos",              TOK_IPTOS },
 350         { "ipttl",              TOK_IPTTL },
 351         { "ipversion",          TOK_IPVER },
 352         { "ipver",              TOK_IPVER },
 353         { "estab",              TOK_ESTAB },
 354         { "established",        TOK_ESTAB },
 355         { "setup",              TOK_SETUP },
 356         { "sockarg",            TOK_SOCKARG },
 357         { "tcpdatalen",         TOK_TCPDATALEN },
 358         { "tcpflags",           TOK_TCPFLAGS },
 359         { "tcpflgs",            TOK_TCPFLAGS },
 360         { "tcpmss",             TOK_TCPMSS },
 361         { "tcpoptions",         TOK_TCPOPTS },
 362         { "tcpopts",            TOK_TCPOPTS },
 363         { "tcpseq",             TOK_TCPSEQ },
 364         { "tcpack",             TOK_TCPACK },
 365         { "tcpwin",             TOK_TCPWIN },
 366         { "icmptype",           TOK_ICMPTYPES },
 367         { "icmptypes",          TOK_ICMPTYPES },
 368         { "dst-ip",             TOK_DSTIP },
 369         { "src-ip",             TOK_SRCIP },
 370         { "dst-port",           TOK_DSTPORT },
 371         { "src-port",           TOK_SRCPORT },
 372         { "dst-mac",            TOK_DSTMAC },
 373         { "src-mac",            TOK_SRCMAC },
 374         { "proto",              TOK_PROTO },
 375         { "MAC",                TOK_MAC },
 376         { "mac",                TOK_MAC },
 377         { "mac-type",           TOK_MACTYPE },
 378         { "verrevpath",         TOK_VERREVPATH },
 379         { "versrcreach",        TOK_VERSRCREACH },
 380         { "antispoof",          TOK_ANTISPOOF },
 381         { "ipsec",              TOK_IPSEC },
 382         { "icmp6type",          TOK_ICMP6TYPES },
 383         { "icmp6types",         TOK_ICMP6TYPES },
 384         { "ext6hdr",            TOK_EXT6HDR },
 385         { "flow-id",            TOK_FLOWID },
 386         { "ipv6",               TOK_IPV6 },
 387         { "ip6",                TOK_IPV6 },
 388         { "ipv4",               TOK_IPV4 },
 389         { "ip4",                TOK_IPV4 },
 390         { "dst-ipv6",           TOK_DSTIP6 },
 391         { "dst-ip6",            TOK_DSTIP6 },
 392         { "src-ipv6",           TOK_SRCIP6 },
 393         { "src-ip6",            TOK_SRCIP6 },
 394         { "lookup",             TOK_LOOKUP },
 395         { "flow",               TOK_FLOW },
 396         { "mark",               TOK_MARK },
 397         { "defer-action",       TOK_SKIPACTION },
 398         { "defer-immediate-action",     TOK_SKIPACTION },
 399         { "//",                 TOK_COMMENT },
 400
 401         { "not",                TOK_NOT },              /* pseudo option */
 402         { "!", /* escape ? */   TOK_NOT },              /* pseudo option */
 403         { "or",                 TOK_OR },               /* pseudo option */
 404         { "|", /* escape */     TOK_OR },               /* pseudo option */
 405         { "{",                  TOK_STARTBRACE },       /* pseudo option */
 406         { "(",                  TOK_STARTBRACE },       /* pseudo option */
 407         { "}",                  TOK_ENDBRACE },         /* pseudo option */
 408         { ")",                  TOK_ENDBRACE },         /* pseudo option */
 409         { NULL, 0 }     /* terminator */
 410 };
 411
 412 void bprint_uint_arg(struct buf_pr *bp, const char *str, uint32_t arg);
 413 static int ipfw_get_config(struct cmdline_opts *co, struct format_opts *fo,
 414     ipfw_cfg_lheader **pcfg, size_t *psize);
 415 static int ipfw_show_config(struct cmdline_opts *co, struct format_opts *fo,
 416     ipfw_cfg_lheader *cfg, size_t sz, int ac, char **av);
 417 static void ipfw_list_tifaces(void);
 418
 419 struct tidx;
 420 static uint16_t pack_object(struct tidx *tstate, const char *name, int otype);
 421 static uint16_t pack_table(struct tidx *tstate, const char *name);
 422
 423 static char *table_search_ctlv(ipfw_obj_ctlv *ctlv, uint16_t idx);
 424 static void object_sort_ctlv(ipfw_obj_ctlv *ctlv);
 425 static char *object_search_ctlv(ipfw_obj_ctlv *ctlv, uint16_t idx,
 426     uint16_t type);
 427
 428 int
 429 is_ipfw(void)
 430 {
 431         return (g_co.prog == cmdline_prog_ipfw);
 432 }
 433
 434 /*
 435  * Simple string buffer API.
 436  * Used to simplify buffer passing between function and for
 437  * transparent overrun handling.
 438  */
 439
 440 /*
 441  * Allocates new buffer of given size @sz.
 442  *
 443  * Returns 0 on success.
 444  */
 445 int
 446 bp_alloc(struct buf_pr *b, size_t size)
 447 {
 448         memset(b, 0, sizeof(struct buf_pr));
 449
 450         if ((b->buf = calloc(1, size)) == NULL)
 451                 return (ENOMEM);
 452
 453         b->ptr = b->buf;
 454         b->size = size;
 455         b->avail = b->size;
 456
 457         return (0);
 458 }
 459
 460 void
 461 bp_free(struct buf_pr *b)
 462 {
 463
 464         free(b->buf);
 465 }
 466
 467 /*
 468  * Flushes buffer so new writer start from beginning.
 469  */
 470 void
 471 bp_flush(struct buf_pr *b)
 472 {
 473
 474         b->ptr = b->buf;
 475         b->avail = b->size;
 476         b->buf[0] = '\0';
 477 }
 478
 479 /*
 480  * Print message specified by @format and args.
 481  * Automatically manage buffer space and transparently handle
 482  * buffer overruns.
 483  *
 484  * Returns number of bytes that should have been printed.
 485  */
 486 int
 487 bprintf(struct buf_pr *b, const char *format, ...)
 488 {
 489         va_list args;
 490         int i;
 491
 492         va_start(args, format);
 493
 494         i = vsnprintf(b->ptr, b->avail, format, args);
 495         va_end(args);
 496
 497         if (i < 0 || (size_t)i > b->avail) {
 498                 /* Overflow or print error */
 499                 b->avail = 0;
 500         } else {
 501                 b->ptr += i;
 502                 b->avail -= i;
 503         }
 504
 505         b->needed += i;
 506
 507         return (i);
 508 }
 509
 510 /*
 511  * Special values printer for tablearg-aware opcodes.
 512  */
 513 void
 514 bprint_uint_arg(struct buf_pr *bp, const char *str, uint32_t arg)
 515 {
 516
 517         if (str != NULL)
 518                 bprintf(bp, "%s", str);
 519         if (arg == IP_FW_TARG)
 520                 bprintf(bp, "tablearg");
 521         else
 522                 bprintf(bp, "%u", arg);
 523 }
 524
 525 /*
 526  * Helper routine to print a possibly unaligned uint64_t on
 527  * various platform. If width > 0, print the value with
 528  * the desired width, followed by a space;
 529  * otherwise, return the required width.
 530  */
 531 int
 532 pr_u64(struct buf_pr *b, void *pd, int width)
 533 {
 534 #ifdef TCC
 535 #define U64_FMT "I64"
 536 #else
 537 #define U64_FMT "llu"
 538 #endif
 539         uint64_t u;
 540         unsigned long long d;
 541
 542         bcopy (pd, &u, sizeof(u));
 543         d = u;
 544         return (width > 0) ?
 545                 bprintf(b, "%*" U64_FMT " ", width, d) :
 546                 snprintf(NULL, 0, "%" U64_FMT, d) ;
 547 #undef U64_FMT
 548 }
 549
 550
 551 void *
 552 safe_calloc(size_t number, size_t size)
 553 {
 554         void *ret = calloc(number, size);
 555
 556         if (ret == NULL)
 557                 err(EX_OSERR, "calloc");
 558         return ret;
 559 }
 560
 561 void *
 562 safe_realloc(void *ptr, size_t size)
 563 {
 564         void *ret = realloc(ptr, size);
 565
 566         if (ret == NULL)
 567                 err(EX_OSERR, "realloc");
 568         return ret;
 569 }
 570
 571 /*
 572  * Compare things like interface or table names.
 573  */
 574 int
 575 stringnum_cmp(const char *a, const char *b)
 576 {
 577         int la, lb;
 578
 579         la = strlen(a);
 580         lb = strlen(b);
 581
 582         if (la > lb)
 583                 return (1);
 584         else if (la < lb)
 585                 return (-01);
 586
 587         return (strcmp(a, b));
 588 }
 589
 590 struct debug_header {
 591         uint16_t cmd_type;
 592         uint16_t spare1;
 593         uint32_t opt_name;
 594         uint32_t total_len;
 595         uint32_t spare2;
 596 };
 597
 598 /*
 599  * conditionally runs the command.
 600  * Selected options or negative -> getsockopt
 601  */
 602 int
 603 do_cmd(int optname, void *optval, uintptr_t optlen)
 604 {
 605         int i;
 606
 607         if (g_co.debug_only) {
 608                 struct debug_header dbg = {
 609                         .cmd_type = 1,
 610                         .opt_name = optname,
 611                         .total_len = optlen + sizeof(struct debug_header),
 612                 };
 613                 write(1, &dbg, sizeof(dbg));
 614                 write(1, optval, optlen);
 615         }
 616
 617         if (g_co.test_only)
 618                 return (0);
 619
 620         if (ipfw_socket == -1)
 621                 ipfw_socket = socket(AF_INET, SOCK_RAW, IPPROTO_RAW);
 622         if (ipfw_socket < 0)
 623                 err(EX_UNAVAILABLE, "socket");
 624
 625         if (optname == IP_FW_GET || optname == IP_DUMMYNET_GET ||
 626             optname == IP_FW_ADD || optname == IP_FW3 ||
 627             optname == IP_FW_NAT_GET_CONFIG ||
 628             optname < 0 ||
 629             optname == IP_FW_NAT_GET_LOG) {
 630                 if (optname < 0)
 631                         optname = -optname;
 632                 i = getsockopt(ipfw_socket, IPPROTO_IP, optname, optval,
 633                         (socklen_t *)optlen);
 634         } else {
 635                 i = setsockopt(ipfw_socket, IPPROTO_IP, optname, optval, optlen);
 636         }
 637         return (i);
 638 }
 639
 640 /*
 641  * do_set3 - pass ipfw control cmd to kernel
 642  * @optname: option name
 643  * @optval: pointer to option data
 644  * @optlen: option length
 645  *
 646  * Assumes op3 header is already embedded.
 647  * Calls setsockopt() with IP_FW3 as kernel-visible opcode.
 648  * Returns 0 on success or errno otherwise.
 649  */
 650 int
 651 do_set3(int optname, ip_fw3_opheader *op3, size_t optlen)
 652 {
 653
 654         op3->opcode = optname;
 655
 656         if (g_co.debug_only) {
 657                 struct debug_header dbg = {
 658                         .cmd_type = 2,
 659                         .opt_name = optname,
 660                         .total_len = optlen, sizeof(struct debug_header),
 661                 };
 662                 write(1, &dbg, sizeof(dbg));
 663                 write(1, op3, optlen);
 664         }
 665
 666         if (g_co.test_only)
 667                 return (0);
 668
 669         if (ipfw_socket == -1)
 670                 ipfw_socket = socket(AF_INET, SOCK_RAW, IPPROTO_RAW);
 671         if (ipfw_socket < 0)
 672                 err(EX_UNAVAILABLE, "socket");
 673
 674
 675         return (setsockopt(ipfw_socket, IPPROTO_IP, IP_FW3, op3, optlen));
 676 }
 677
 678 /*
 679  * do_get3 - pass ipfw control cmd to kernel
 680  * @optname: option name
 681  * @optval: pointer to option data
 682  * @optlen: pointer to option length
 683  *
 684  * Assumes op3 header is already embedded.
 685  * Calls getsockopt() with IP_FW3 as kernel-visible opcode.
 686  * Returns 0 on success or errno otherwise.
 687  */
 688 int
 689 do_get3(int optname, ip_fw3_opheader *op3, size_t *optlen)
 690 {
 691         int error;
 692         socklen_t len;
 693
 694         op3->opcode = optname;
 695
 696         if (g_co.debug_only) {
 697                 struct debug_header dbg = {
 698                         .cmd_type = 3,
 699                         .opt_name = optname,
 700                         .total_len = *optlen + sizeof(struct debug_header),
 701                 };
 702                 write(1, &dbg, sizeof(dbg));
 703                 write(1, op3, *optlen);
 704         }
 705
 706         if (g_co.test_only)
 707                 return (0);
 708
 709         if (ipfw_socket == -1)
 710                 ipfw_socket = socket(AF_INET, SOCK_RAW, IPPROTO_RAW);
 711         if (ipfw_socket < 0)
 712                 err(EX_UNAVAILABLE, "socket");
 713
 714
 715         len = *optlen;
 716         error = getsockopt(ipfw_socket, IPPROTO_IP, IP_FW3, op3, &len);
 717         *optlen = len;
 718
 719         return (error);
 720 }
 721
 722 /**
 723  * match_token takes a table and a string, returns the value associated
 724  * with the string (-1 in case of failure).
 725  */
 726 int
 727 match_token(struct _s_x *table, const char *string)
 728 {
 729         struct _s_x *pt;
 730         uint i = strlen(string);
 731
 732         for (pt = table ; i && pt->s != NULL ; pt++)
 733                 if (strlen(pt->s) == i && !bcmp(string, pt->s, i))
 734                         return pt->x;
 735         return (-1);
 736 }
 737
 738 /**
 739  * match_token_relaxed takes a table and a string, returns the value associated
 740  * with the string for the best match.
 741  *
 742  * Returns:
 743  * value from @table for matched records
 744  * -1 for non-matched records
 745  * -2 if more than one records match @string.
 746  */
 747 int
 748 match_token_relaxed(struct _s_x *table, const char *string)
 749 {
 750         struct _s_x *pt, *m;
 751         int i, c;
 752
 753         i = strlen(string);
 754         c = 0;
 755
 756         for (pt = table ; i != 0 && pt->s != NULL ; pt++) {
 757                 if (strncmp(pt->s, string, i) != 0)
 758                         continue;
 759                 m = pt;
 760                 c++;
 761         }
 762
 763         if (c == 1)
 764                 return (m->x);
 765
 766         return (c > 0 ? -2: -1);
 767 }
 768
 769 int
 770 get_token(struct _s_x *table, const char *string, const char *errbase)
 771 {
 772         int tcmd;
 773
 774         if ((tcmd = match_token_relaxed(table, string)) < 0)
 775                 errx(EX_USAGE, "%s %s %s",
 776                     (tcmd == 0) ? "invalid" : "ambiguous", errbase, string);
 777
 778         return (tcmd);
 779 }
 780
 781 /**
 782  * match_value takes a table and a value, returns the string associated
 783  * with the value (NULL in case of failure).
 784  */
 785 char const *
 786 match_value(struct _s_x *p, int value)
 787 {
 788         for (; p->s != NULL; p++)
 789                 if (p->x == value)
 790                         return p->s;
 791         return NULL;
 792 }
 793
 794 size_t
 795 concat_tokens(char *buf, size_t bufsize, struct _s_x *table,
 796     const char *delimiter)
 797 {
 798         struct _s_x *pt;
 799         int l;
 800         size_t sz;
 801
 802         for (sz = 0, pt = table ; pt->s != NULL; pt++) {
 803                 l = snprintf(buf + sz, bufsize - sz, "%s%s",
 804                     (sz == 0) ? "" : delimiter, pt->s);
 805                 sz += l;
 806                 bufsize += l;
 807                 if (sz > bufsize)
 808                         return (bufsize);
 809         }
 810
 811         return (sz);
 812 }
 813
 814 /*
 815  * helper function to process a set of flags and set bits in the
 816  * appropriate masks.
 817  */
 818 int
 819 fill_flags(struct _s_x *flags, char *p, char **e, uint32_t *set,
 820     uint32_t *clear)
 821 {
 822         char *q;        /* points to the separator */
 823         int val;
 824         uint32_t *which;        /* mask we are working on */
 825
 826         while (p && *p) {
 827                 if (*p == '!') {
 828                         p++;
 829                         which = clear;
 830                 } else
 831                         which = set;
 832                 q = strchr(p, ',');
 833                 if (q)
 834                         *q++ = '\0';
 835                 val = match_token(flags, p);
 836                 if (val <= 0) {
 837                         if (e != NULL)
 838                                 *e = p;
 839                         return (-1);
 840                 }
 841                 *which |= (uint32_t)val;
 842                 p = q;
 843         }
 844         return (0);
 845 }
 846
 847 void
 848 print_flags_buffer(char *buf, size_t sz, struct _s_x *list, uint32_t set)
 849 {
 850         char const *comma = "";
 851         int i, l;
 852
 853         for (i = 0; list[i].x != 0; i++) {
 854                 if ((set & list[i].x) == 0)
 855                         continue;
 856
 857                 set &= ~list[i].x;
 858                 l = snprintf(buf, sz, "%s%s", comma, list[i].s);
 859                 if (l < 0 || (size_t)l >= sz)
 860                         return;
 861                 comma = ",";
 862                 buf += l;
 863                 sz -=l;
 864         }
 865 }
 866
 867 /*
 868  * _substrcmp takes two strings and returns 1 if they do not match,
 869  * and 0 if they match exactly or the first string is a sub-string
 870  * of the second.  A warning is printed to stderr in the case that the
 871  * first string is a sub-string of the second.
 872  *
 873  * This function will be removed in the future through the usual
 874  * deprecation process.
 875  */
 876 int
 877 _substrcmp(const char *str1, const char* str2)
 878 {
 879
 880         if (strncmp(str1, str2, strlen(str1)) != 0)
 881                 return 1;
 882
 883         if (strlen(str1) != strlen(str2))
 884                 warnx("DEPRECATED: '%s' matched '%s' as a sub-string",
 885                     str1, str2);
 886         return 0;
 887 }
 888
 889 /*
 890  * _substrcmp2 takes three strings and returns 1 if the first two do not match,
 891  * and 0 if they match exactly or the second string is a sub-string
 892  * of the first.  A warning is printed to stderr in the case that the
 893  * first string does not match the third.
 894  *
 895  * This function exists to warn about the bizarre construction
 896  * strncmp(str, "by", 2) which is used to allow people to use a shortcut
 897  * for "bytes".  The problem is that in addition to accepting "by",
 898  * "byt", "byte", and "bytes", it also excepts "by_rabid_dogs" and any
 899  * other string beginning with "by".
 900  *
 901  * This function will be removed in the future through the usual
 902  * deprecation process.
 903  */
 904 int
 905 _substrcmp2(const char *str1, const char* str2, const char* str3)
 906 {
 907
 908         if (strncmp(str1, str2, strlen(str2)) != 0)
 909                 return 1;
 910
 911         if (strcmp(str1, str3) != 0)
 912                 warnx("DEPRECATED: '%s' matched '%s'",
 913                     str1, str3);
 914         return 0;
 915 }
 916
 917 /*
 918  * prints one port, symbolic or numeric
 919  */
 920 static void
 921 print_port(struct buf_pr *bp, int proto, uint16_t port)
 922 {
 923
 924         if (proto == IPPROTO_ETHERTYPE) {
 925                 char const *s;
 926
 927                 if (g_co.do_resolv && (s = match_value(ether_types, port)) )
 928                         bprintf(bp, "%s", s);
 929                 else
 930                         bprintf(bp, "0x%04x", port);
 931         } else {
 932                 struct servent *se = NULL;
 933                 if (g_co.do_resolv) {
 934                         struct protoent *pe = getprotobynumber(proto);
 935
 936                         se = getservbyport(htons(port), pe ? pe->p_name : NULL);
 937                 }
 938                 if (se)
 939                         bprintf(bp, "%s", se->s_name);
 940                 else
 941                         bprintf(bp, "%d", port);
 942         }
 943 }
 944
 945 static struct _s_x _port_name[] = {
 946         {"dst-port",    O_IP_DSTPORT},
 947         {"src-port",    O_IP_SRCPORT},
 948         {"ipid",        O_IPID},
 949         {"iplen",       O_IPLEN},
 950         {"ipttl",       O_IPTTL},
 951         {"mac-type",    O_MAC_TYPE},
 952         {"tcpdatalen",  O_TCPDATALEN},
 953         {"tcpmss",      O_TCPMSS},
 954         {"tcpwin",      O_TCPWIN},
 955         {"tagged",      O_TAGGED},
 956         {NULL,          0}
 957 };
 958
 959 /*
 960  * Print the values in a list 16-bit items of the types above.
 961  * XXX todo: add support for mask.
 962  */
 963 static void
 964 print_newports(struct buf_pr *bp, const ipfw_insn_u16 *cmd, int proto, int opcode)
 965 {
 966         const uint16_t *p = cmd->ports;
 967         int i;
 968         char const *sep;
 969
 970         if (opcode != 0) {
 971                 sep = match_value(_port_name, opcode);
 972                 if (sep == NULL)
 973                         sep = "???";
 974                 bprintf(bp, " %s", sep);
 975         }
 976         sep = " ";
 977         for (i = F_LEN((const ipfw_insn *)cmd) - 1; i > 0; i--, p += 2) {
 978                 bprintf(bp, "%s", sep);
 979                 print_port(bp, proto, p[0]);
 980                 if (p[0] != p[1]) {
 981                         bprintf(bp, "-");
 982                         print_port(bp, proto, p[1]);
 983                 }
 984                 sep = ",";
 985         }
 986 }
 987
 988 /*
 989  * Like strtol, but also translates service names into port numbers
 990  * for some protocols.
 991  * In particular:
 992  *      proto == -1 disables the protocol check;
 993  *      proto == IPPROTO_ETHERTYPE looks up an internal table
 994  *      proto == <some value in /etc/protocols> matches the values there.
 995  * Returns *end == s in case the parameter is not found.
 996  */
 997 static int
 998 strtoport(char *s, char **end, int base, int proto)
 999 {
1000         char *p, *buf;
1001         char *s1;
1002         int i;
1003
1004         *end = s;               /* default - not found */
1005         if (*s == '\0')
1006                 return 0;       /* not found */
1007
1008         if (isdigit(*s))
1009                 return strtol(s, end, base);
1010
1011         /*
1012          * find separator. '\\' escapes the next char.
1013          */
1014         for (s1 = s; *s1 && (isalnum(*s1) || *s1 == '\\' ||
1015             *s1 == '_' || *s1 == '.') ; s1++)
1016                 if (*s1 == '\\' && s1[1] != '\0')
1017                         s1++;
1018
1019         buf = safe_calloc(s1 - s + 1, 1);
1020
1021         /*
1022          * copy into a buffer skipping backslashes
1023          */
1024         for (p = s, i = 0; p != s1 ; p++)
1025                 if (*p != '\\')
1026                         buf[i++] = *p;
1027         buf[i++] = '\0';
1028
1029         if (proto == IPPROTO_ETHERTYPE) {
1030                 i = match_token(ether_types, buf);
1031                 free(buf);
1032                 if (i != -1) {  /* found */
1033                         *end = s1;
1034                         return i;
1035                 }
1036         } else {
1037                 struct protoent *pe = NULL;
1038                 struct servent *se;
1039
1040                 if (proto != 0)
1041                         pe = getprotobynumber(proto);
1042                 setservent(1);
1043                 se = getservbyname(buf, pe ? pe->p_name : NULL);
1044                 free(buf);
1045                 if (se != NULL) {
1046                         *end = s1;
1047                         return ntohs(se->s_port);
1048                 }
1049         }
1050         return 0;       /* not found */
1051 }
1052
1053 /*
1054  * Fill the body of the command with the list of port ranges.
1055  */
1056 static int
1057 fill_newports(ipfw_insn_u16 *cmd, char *av, int proto, int cblen)
1058 {
1059         uint16_t a, b, *p = cmd->ports;
1060         int i = 0;
1061         char *s = av;
1062
1063         while (*s) {
1064                 a = strtoport(av, &s, 0, proto);
1065                 if (s == av)                    /* empty or invalid argument */
1066                         return (0);
1067
1068                 CHECK_LENGTH(cblen, i + 2);
1069
1070                 switch (*s) {
1071                 case '-':                       /* a range */
1072                         av = s + 1;
1073                         b = strtoport(av, &s, 0, proto);
1074                         /* Reject expressions like '1-abc' or '1-2-3'. */
1075                         if (s == av || (*s != ',' && *s != '\0'))
1076                                 return (0);
1077                         p[0] = a;
1078                         p[1] = b;
1079                         break;
1080                 case ',':                       /* comma separated list */
1081                 case '\0':
1082                         p[0] = p[1] = a;
1083                         break;
1084                 default:
1085                         warnx("port list: invalid separator <%c> in <%s>",
1086                                 *s, av);
1087                         return (0);
1088                 }
1089
1090                 i++;
1091                 p += 2;
1092                 av = s + 1;
1093         }
1094         if (i > 0) {
1095                 if (i + 1 > F_LEN_MASK)
1096                         errx(EX_DATAERR, "too many ports/ranges\n");
1097                 cmd->o.len |= i + 1;    /* leave F_NOT and F_OR untouched */
1098         }
1099         return (i);
1100 }
1101
1102 /*
1103  * Fill the body of the command with the list of DiffServ codepoints.
1104  */
1105 static void
1106 fill_dscp(ipfw_insn *cmd, char *av, int cblen)
1107 {
1108         uint32_t *low, *high;
1109         char *s = av, *a;
1110         int code;
1111
1112         cmd->opcode = O_DSCP;
1113         cmd->len |= F_INSN_SIZE(ipfw_insn_u32) + 1;
1114
1115         CHECK_CMDLEN;
1116
1117         low = (uint32_t *)(cmd + 1);
1118         high = low + 1;
1119
1120         *low = 0;
1121         *high = 0;
1122
1123         while (s != NULL) {
1124                 a = strchr(s, ',');
1125
1126                 if (a != NULL)
1127                         *a++ = '\0';
1128
1129                 if (isalpha(*s)) {
1130                         if ((code = match_token(f_ipdscp, s)) == -1)
1131                                 errx(EX_DATAERR, "Unknown DSCP code");
1132                 } else {
1133                         code = strtoul(s, NULL, 10);
1134                         if (code < 0 || code > 63)
1135                                 errx(EX_DATAERR, "Invalid DSCP value");
1136                 }
1137
1138                 if (code >= 32)
1139                         *high |= 1 << (code - 32);
1140                 else
1141                         *low |= 1 << code;
1142
1143                 s = a;
1144         }
1145 }
1146
1147 /*
1148  * Fill the body of the command with mark value and mask.
1149  */
1150 static void
1151 fill_mark(ipfw_insn *cmd, char *av, int cblen)
1152 {
1153         uint32_t *value, *mask;
1154         char *value_str;
1155
1156         cmd->opcode = O_MARK;
1157         cmd->len |= F_INSN_SIZE(ipfw_insn_u32) + 1;
1158
1159         CHECK_CMDLEN;
1160
1161         value = (uint32_t *)(cmd + 1);
1162         mask = value + 1;
1163
1164         value_str = strsep(&av, ":");
1165
1166         if (strcmp(value_str, "tablearg") == 0) {
1167                 cmd->arg1 = IP_FW_TARG;
1168                 *value = 0;
1169         } else {
1170                 /* This is not a tablearg */
1171                 cmd->arg1 |= 0x8000;
1172                 *value = strtoul(value_str, NULL, 0);
1173         }
1174         if (av)
1175                 *mask = strtoul(av, NULL, 0);
1176         else
1177                 *mask = 0xFFFFFFFF;
1178
1179         if ((*value & *mask) != *value)
1180                 errx(EX_DATAERR, "Static mark value: some bits in value are"
1181                     " set that will be masked out by mask "
1182                     "(%#x & %#x) = %#x != %#x",
1183                     *value, *mask, (*value & *mask), *value);
1184 }
1185
1186 static struct _s_x icmpcodes[] = {
1187       { "net",                  ICMP_UNREACH_NET },
1188       { "host",                 ICMP_UNREACH_HOST },
1189       { "protocol",             ICMP_UNREACH_PROTOCOL },
1190       { "port",                 ICMP_UNREACH_PORT },
1191       { "needfrag",             ICMP_UNREACH_NEEDFRAG },
1192       { "srcfail",              ICMP_UNREACH_SRCFAIL },
1193       { "net-unknown",          ICMP_UNREACH_NET_UNKNOWN },
1194       { "host-unknown",         ICMP_UNREACH_HOST_UNKNOWN },
1195       { "isolated",             ICMP_UNREACH_ISOLATED },
1196       { "net-prohib",           ICMP_UNREACH_NET_PROHIB },
1197       { "host-prohib",          ICMP_UNREACH_HOST_PROHIB },
1198       { "tosnet",               ICMP_UNREACH_TOSNET },
1199       { "toshost",              ICMP_UNREACH_TOSHOST },
1200       { "filter-prohib",        ICMP_UNREACH_FILTER_PROHIB },
1201       { "host-precedence",      ICMP_UNREACH_HOST_PRECEDENCE },
1202       { "precedence-cutoff",    ICMP_UNREACH_PRECEDENCE_CUTOFF },
1203       { NULL, 0 }
1204 };
1205
1206 static uint16_t
1207 get_reject_code(const char *str)
1208 {
1209         int val;
1210         char *s;
1211
1212         val = strtoul(str, &s, 0);
1213         if (s == str || *s != '\0' || val >= 0x100)
1214                 val = match_token(icmpcodes, str);
1215         if (val < 0)
1216                 errx(EX_DATAERR, "unknown ICMP unreachable code ``%s''", str);
1217         return (val);
1218 }
1219
1220 static void
1221 print_reject_code(struct buf_pr *bp, uint16_t code)
1222 {
1223         char const *s;
1224
1225         if ((s = match_value(icmpcodes, code)) != NULL)
1226                 bprintf(bp, "unreach %s", s);
1227         else
1228                 bprintf(bp, "unreach %u", code);
1229 }
1230
1231 /*
1232  * Returns the number of bits set (from left) in a contiguous bitmask,
1233  * or -1 if the mask is not contiguous.
1234  * XXX this needs a proper fix.
1235  * This effectively works on masks in big-endian (network) format.
1236  * when compiled on little endian architectures.
1237  *
1238  * First bit is bit 7 of the first byte -- note, for MAC addresses,
1239  * the first bit on the wire is bit 0 of the first byte.
1240  * len is the max length in bits.
1241  */
1242 int
1243 contigmask(const uint8_t *p, int len)
1244 {
1245         int i, n;
1246
1247         for (i=0; i<len ; i++)
1248                 if ( (p[i/8] & (1 << (7 - (i%8)))) == 0) /* first bit unset */
1249                         break;
1250         for (n=i+1; n < len; n++)
1251                 if ( (p[n/8] & (1 << (7 - (n%8)))) != 0)
1252                         return -1; /* mask not contiguous */
1253         return i;
1254 }
1255
1256 /*
1257  * print flags set/clear in the two bitmasks passed as parameters.
1258  * There is a specialized check for f_tcpflags.
1259  */
1260 static void
1261 print_flags(struct buf_pr *bp, char const *name, const ipfw_insn *cmd,
1262     struct _s_x *list)
1263 {
1264         char const *comma = "";
1265         int i;
1266         uint8_t set = cmd->arg1 & 0xff;
1267         uint8_t clear = (cmd->arg1 >> 8) & 0xff;
1268
1269         if (list == f_tcpflags && set == TH_SYN && clear == TH_ACK) {
1270                 bprintf(bp, " setup");
1271                 return;
1272         }
1273
1274         bprintf(bp, " %s ", name);
1275         for (i=0; list[i].x != 0; i++) {
1276                 if (set & list[i].x) {
1277                         set &= ~list[i].x;
1278                         bprintf(bp, "%s%s", comma, list[i].s);
1279                         comma = ",";
1280                 }
1281                 if (clear & list[i].x) {
1282                         clear &= ~list[i].x;
1283                         bprintf(bp, "%s!%s", comma, list[i].s);
1284                         comma = ",";
1285                 }
1286         }
1287 }
1288
1289
1290 /*
1291  * Print the ip address contained in a command.
1292  */
1293 static void
1294 print_ip(struct buf_pr *bp, const struct format_opts *fo,
1295     const ipfw_insn_ip *cmd)
1296 {
1297         struct hostent *he = NULL;
1298         const struct in_addr *ia;
1299         const uint32_t *a = ((const ipfw_insn_u32 *)cmd)->d;
1300         uint32_t len = F_LEN((const ipfw_insn *)cmd);
1301         char *t;
1302
1303         bprintf(bp, " ");
1304         if (cmd->o.opcode == O_IP_DST_LOOKUP && len > F_INSN_SIZE(ipfw_insn_u32)) {
1305                 const char *arg;
1306
1307                 arg = match_value(lookup_keys, a[1]);
1308                 t = table_search_ctlv(fo->tstate,
1309                     ((const ipfw_insn *)cmd)->arg1);
1310                 bprintf(bp, "lookup %s %s", arg, t);
1311                 return;
1312         }
1313         if (cmd->o.opcode == O_IP_SRC_ME || cmd->o.opcode == O_IP_DST_ME) {
1314                 bprintf(bp, "me");
1315                 return;
1316         }
1317         if (cmd->o.opcode == O_IP_SRC_LOOKUP ||
1318             cmd->o.opcode == O_IP_DST_LOOKUP) {
1319                 t = table_search_ctlv(fo->tstate,
1320                     ((const ipfw_insn *)cmd)->arg1);
1321                 bprintf(bp, "table(%s", t);
1322                 if (len == F_INSN_SIZE(ipfw_insn_u32))
1323                         bprintf(bp, ",%u", *a);
1324                 bprintf(bp, ")");
1325                 return;
1326         }
1327         if (cmd->o.opcode == O_IP_SRC_SET || cmd->o.opcode == O_IP_DST_SET) {
1328                 const uint32_t *map = (const uint32_t *)&cmd->mask;
1329                 struct in_addr addr;
1330                 uint32_t x;
1331                 int i, j;
1332                 char comma = '{';
1333
1334                 x = cmd->o.arg1 - 1;
1335                 x = htonl(~x);
1336                 addr.s_addr = htonl(cmd->addr.s_addr);
1337                 bprintf(bp, "%s/%d", inet_ntoa(addr),
1338                     contigmask((uint8_t *)&x, 32));
1339                 x = cmd->addr.s_addr;
1340                 x &= 0xff; /* base */
1341                 /*
1342                  * Print bits and ranges.
1343                  * Locate first bit set (i), then locate first bit unset (j).
1344                  * If we have 3+ consecutive bits set, then print them as a
1345                  * range, otherwise only print the initial bit and rescan.
1346                  */
1347                 for (i=0; i < cmd->o.arg1; i++)
1348                         if (map[i/32] & (1<<(i & 31))) {
1349                                 for (j=i+1; j < cmd->o.arg1; j++)
1350                                         if (!(map[ j/32] & (1<<(j & 31))))
1351                                                 break;
1352                                 bprintf(bp, "%c%d", comma, i+x);
1353                                 if (j>i+2) { /* range has at least 3 elements */
1354                                         bprintf(bp, "-%d", j-1+x);
1355                                         i = j-1;
1356                                 }
1357                                 comma = ',';
1358                         }
1359                 bprintf(bp, "}");
1360                 return;
1361         }
1362         /*
1363          * len == 2 indicates a single IP, whereas lists of 1 or more
1364          * addr/mask pairs have len = (2n+1). We convert len to n so we
1365          * use that to count the number of entries.
1366          */
1367     for (len = len / 2; len > 0; len--, a += 2) {
1368         int mb =        /* mask length */
1369             (cmd->o.opcode == O_IP_SRC || cmd->o.opcode == O_IP_DST) ?
1370                 32 : contigmask((const uint8_t *)&(a[1]), 32);
1371         if (mb == 32 && g_co.do_resolv)
1372                 he = gethostbyaddr((const char *)&(a[0]), sizeof(in_addr_t),
1373                     AF_INET);
1374         if (he != NULL)         /* resolved to name */
1375                 bprintf(bp, "%s", he->h_name);
1376         else if (mb == 0)       /* any */
1377                 bprintf(bp, "any");
1378         else {          /* numeric IP followed by some kind of mask */
1379                 ia = (const struct in_addr *)&a[0];
1380                 bprintf(bp, "%s", inet_ntoa(*ia));
1381                 if (mb < 0) {
1382                         ia = (const struct in_addr *)&a[1];
1383                         bprintf(bp, ":%s", inet_ntoa(*ia));
1384                 } else if (mb < 32)
1385                         bprintf(bp, "/%d", mb);
1386         }
1387         if (len > 1)
1388                 bprintf(bp, ",");
1389     }
1390 }
1391
1392 /*
1393  * prints a MAC address/mask pair
1394  */
1395 static void
1396 format_mac(struct buf_pr *bp, const uint8_t *addr, const uint8_t *mask)
1397 {
1398         int l = contigmask(mask, 48);
1399
1400         if (l == 0)
1401                 bprintf(bp, " any");
1402         else {
1403                 bprintf(bp, " %02x:%02x:%02x:%02x:%02x:%02x",
1404                     addr[0], addr[1], addr[2], addr[3], addr[4], addr[5]);
1405                 if (l == -1)
1406                         bprintf(bp, "&%02x:%02x:%02x:%02x:%02x:%02x",
1407                             mask[0], mask[1], mask[2],
1408                             mask[3], mask[4], mask[5]);
1409                 else if (l < 48)
1410                         bprintf(bp, "/%d", l);
1411         }
1412 }
1413
1414 static void
1415 print_mac(struct buf_pr *bp, const ipfw_insn_mac *mac)
1416 {
1417
1418         bprintf(bp, " MAC");
1419         format_mac(bp, mac->addr, mac->mask);
1420         format_mac(bp, mac->addr + 6, mac->mask + 6);
1421 }
1422
1423 static void
1424 print_mac_lookup(struct buf_pr *bp, const struct format_opts *fo,
1425     const ipfw_insn *cmd)
1426 {
1427         uint32_t len = F_LEN(cmd);
1428         char *t;
1429
1430         bprintf(bp, " ");
1431
1432         t = table_search_ctlv(fo->tstate, cmd->arg1);
1433         bprintf(bp, "table(%s", t);
1434         if (len == F_INSN_SIZE(ipfw_insn_u32))
1435                 bprintf(bp, ",%u", ((const ipfw_insn_u32 *)cmd)->d[0]);
1436         bprintf(bp, ")");
1437 }
1438
1439 static void
1440 fill_icmptypes(ipfw_insn_u32 *cmd, char *av)
1441 {
1442         uint8_t type;
1443
1444         cmd->d[0] = 0;
1445         while (*av) {
1446                 if (*av == ',')
1447                         av++;
1448
1449                 type = strtoul(av, &av, 0);
1450
1451                 if (*av != ',' && *av != '\0')
1452                         errx(EX_DATAERR, "invalid ICMP type");
1453
1454                 if (type > 31)
1455                         errx(EX_DATAERR, "ICMP type out of range");
1456
1457                 cmd->d[0] |= 1 << type;
1458         }
1459         cmd->o.opcode = O_ICMPTYPE;
1460         cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32);
1461 }
1462
1463 static void
1464 print_icmptypes(struct buf_pr *bp, const ipfw_insn_u32 *cmd)
1465 {
1466         int i;
1467         char sep= ' ';
1468
1469         bprintf(bp, " icmptypes");
1470         for (i = 0; i < 32; i++) {
1471                 if ( (cmd->d[0] & (1 << (i))) == 0)
1472                         continue;
1473                 bprintf(bp, "%c%d", sep, i);
1474                 sep = ',';
1475         }
1476 }
1477
1478 static void
1479 print_dscp(struct buf_pr *bp, const ipfw_insn_u32 *cmd)
1480 {
1481         const uint32_t *v;
1482         const char *code;
1483         int i = 0;
1484         char sep= ' ';
1485
1486         bprintf(bp, " dscp");
1487         v = cmd->d;
1488         while (i < 64) {
1489                 if (*v & (1 << i)) {
1490                         if ((code = match_value(f_ipdscp, i)) != NULL)
1491                                 bprintf(bp, "%c%s", sep, code);
1492                         else
1493                                 bprintf(bp, "%c%d", sep, i);
1494                         sep = ',';
1495                 }
1496
1497                 if ((++i % 32) == 0)
1498                         v++;
1499         }
1500 }
1501
1502 #define insntod(cmd, type)      ((const ipfw_insn_ ## type *)(cmd))
1503 struct show_state {
1504         struct ip_fw_rule       *rule;
1505         const ipfw_insn         *eaction;
1506         uint8_t                 *printed;
1507         int                     flags;
1508 #define HAVE_PROTO              0x0001
1509 #define HAVE_SRCIP              0x0002
1510 #define HAVE_DSTIP              0x0004
1511 #define HAVE_PROBE_STATE        0x0008
1512         int                     proto;
1513         int                     or_block;
1514 };
1515
1516 static int
1517 init_show_state(struct show_state *state, struct ip_fw_rule *rule)
1518 {
1519
1520         state->printed = calloc(rule->cmd_len, sizeof(uint8_t));
1521         if (state->printed == NULL)
1522                 return (ENOMEM);
1523         state->rule = rule;
1524         state->eaction = NULL;
1525         state->flags = 0;
1526         state->proto = 0;
1527         state->or_block = 0;
1528         return (0);
1529 }
1530
1531 static void
1532 free_show_state(struct show_state *state)
1533 {
1534
1535         free(state->printed);
1536 }
1537
1538 static uint8_t
1539 is_printed_opcode(struct show_state *state, const ipfw_insn *cmd)
1540 {
1541
1542         return (state->printed[cmd - state->rule->cmd]);
1543 }
1544
1545 static void
1546 mark_printed(struct show_state *state, const ipfw_insn *cmd)
1547 {
1548
1549         state->printed[cmd - state->rule->cmd] = 1;
1550 }
1551
1552 static void
1553 print_limit_mask(struct buf_pr *bp, const ipfw_insn_limit *limit)
1554 {
1555         struct _s_x *p = limit_masks;
1556         char const *comma = " ";
1557         uint8_t x;
1558
1559         for (x = limit->limit_mask; p->x != 0; p++) {
1560                 if ((x & p->x) == p->x) {
1561                         x &= ~p->x;
1562                         bprintf(bp, "%s%s", comma, p->s);
1563                         comma = ",";
1564                 }
1565         }
1566         bprint_uint_arg(bp, " ", limit->conn_limit);
1567 }
1568
1569 static int
1570 print_instruction(struct buf_pr *bp, const struct format_opts *fo,
1571     struct show_state *state, const ipfw_insn *cmd)
1572 {
1573         struct protoent *pe;
1574         struct passwd *pwd;
1575         struct group *grp;
1576         const char *s;
1577         double d;
1578
1579         if (is_printed_opcode(state, cmd))
1580                 return (0);
1581         if ((cmd->len & F_OR) != 0 && state->or_block == 0)
1582                 bprintf(bp, " {");
1583         if (cmd->opcode != O_IN && (cmd->len & F_NOT) != 0)
1584                 bprintf(bp, " not");
1585
1586         switch (cmd->opcode) {
1587         case O_PROB:
1588                 d = 1.0 * insntod(cmd, u32)->d[0] / 0x7fffffff;
1589                 bprintf(bp, "prob %f ", d);
1590                 break;
1591         case O_PROBE_STATE: /* no need to print anything here */
1592                 state->flags |= HAVE_PROBE_STATE;
1593                 break;
1594         case O_IP_SRC:
1595         case O_IP_SRC_LOOKUP:
1596         case O_IP_SRC_MASK:
1597         case O_IP_SRC_ME:
1598         case O_IP_SRC_SET:
1599                 if (state->flags & HAVE_SRCIP)
1600                         bprintf(bp, " src-ip");
1601                 print_ip(bp, fo, insntod(cmd, ip));
1602                 break;
1603         case O_IP_DST:
1604         case O_IP_DST_LOOKUP:
1605         case O_IP_DST_MASK:
1606         case O_IP_DST_ME:
1607         case O_IP_DST_SET:
1608                 if (state->flags & HAVE_DSTIP)
1609                         bprintf(bp, " dst-ip");
1610                 print_ip(bp, fo, insntod(cmd, ip));
1611                 break;
1612         case O_IP6_SRC:
1613         case O_IP6_SRC_MASK:
1614         case O_IP6_SRC_ME:
1615                 if (state->flags & HAVE_SRCIP)
1616                         bprintf(bp, " src-ip6");
1617                 print_ip6(bp, insntod(cmd, ip6));
1618                 break;
1619         case O_IP6_DST:
1620         case O_IP6_DST_MASK:
1621         case O_IP6_DST_ME:
1622                 if (state->flags & HAVE_DSTIP)
1623                         bprintf(bp, " dst-ip6");
1624                 print_ip6(bp, insntod(cmd, ip6));
1625                 break;
1626         case O_MAC_SRC_LOOKUP:
1627                 bprintf(bp, " src-mac");
1628                 print_mac_lookup(bp, fo, cmd);
1629                 break;
1630         case O_MAC_DST_LOOKUP:
1631                 bprintf(bp, " dst-mac");
1632                 print_mac_lookup(bp, fo, cmd);
1633                 break;
1634         case O_FLOW6ID:
1635                 print_flow6id(bp, insntod(cmd, u32));
1636                 break;
1637         case O_IP_DSTPORT:
1638         case O_IP_SRCPORT:
1639                 print_newports(bp, insntod(cmd, u16), state->proto,
1640                     (state->flags & (HAVE_SRCIP | HAVE_DSTIP)) ==
1641                     (HAVE_SRCIP | HAVE_DSTIP) ?  cmd->opcode: 0);
1642                 break;
1643         case O_PROTO:
1644                 pe = getprotobynumber(cmd->arg1);
1645                 if (state->flags & HAVE_PROTO)
1646                         bprintf(bp, " proto");
1647                 if (pe != NULL)
1648                         bprintf(bp, " %s", pe->p_name);
1649                 else
1650                         bprintf(bp, " %u", cmd->arg1);
1651                 state->proto = cmd->arg1;
1652                 break;
1653         case O_MACADDR2:
1654                 print_mac(bp, insntod(cmd, mac));
1655                 break;
1656         case O_MAC_TYPE:
1657                 print_newports(bp, insntod(cmd, u16),
1658                     IPPROTO_ETHERTYPE, cmd->opcode);
1659                 break;
1660         case O_FRAG:
1661                 print_flags(bp, "frag", cmd, f_ipoff);
1662                 break;
1663         case O_FIB:
1664                 bprintf(bp, " fib %u", cmd->arg1);
1665                 break;
1666         case O_SOCKARG:
1667                 bprintf(bp, " sockarg");
1668                 break;
1669         case O_IN:
1670                 bprintf(bp, cmd->len & F_NOT ? " out" : " in");
1671                 break;
1672         case O_DIVERTED:
1673                 switch (cmd->arg1) {
1674                 case 3:
1675                         bprintf(bp, " diverted");
1676                         break;
1677                 case 2:
1678                         bprintf(bp, " diverted-output");
1679                         break;
1680                 case 1:
1681                         bprintf(bp, " diverted-loopback");
1682                         break;
1683                 default:
1684                         bprintf(bp, " diverted-?<%u>", cmd->arg1);
1685                         break;
1686                 }
1687                 break;
1688         case O_LAYER2:
1689                 bprintf(bp, " layer2");
1690                 break;
1691         case O_XMIT:
1692         case O_RECV:
1693         case O_VIA:
1694                 if (cmd->opcode == O_XMIT)
1695                         s = "xmit";
1696                 else if (cmd->opcode == O_RECV)
1697                         s = "recv";
1698                 else /* if (cmd->opcode == O_VIA) */
1699                         s = "via";
1700                 switch (insntod(cmd, if)->name[0]) {
1701                 case '\0':
1702                         bprintf(bp, " %s %s", s,
1703                             inet_ntoa(insntod(cmd, if)->p.ip));
1704                         break;
1705                 case '\1':
1706                         bprintf(bp, " %s table(%s)", s,
1707                             table_search_ctlv(fo->tstate,
1708                             insntod(cmd, if)->p.kidx));
1709                         break;
1710                 default:
1711                         bprintf(bp, " %s %s", s,
1712                             insntod(cmd, if)->name);
1713                 }
1714                 break;
1715         case O_IP_FLOW_LOOKUP:
1716                 s = table_search_ctlv(fo->tstate, cmd->arg1);
1717                 bprintf(bp, " flow table(%s", s);
1718                 if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_u32))
1719                         bprintf(bp, ",%u", insntod(cmd, u32)->d[0]);
1720                 bprintf(bp, ")");
1721                 break;
1722         case O_IPID:
1723         case O_IPTTL:
1724         case O_IPLEN:
1725         case O_TCPDATALEN:
1726         case O_TCPMSS:
1727         case O_TCPWIN:
1728                 if (F_LEN(cmd) == 1) {
1729                         switch (cmd->opcode) {
1730                         case O_IPID:
1731                                 s = "ipid";
1732                                 break;
1733                         case O_IPTTL:
1734                                 s = "ipttl";
1735                                 break;
1736                         case O_IPLEN:
1737                                 s = "iplen";
1738                                 break;
1739                         case O_TCPDATALEN:
1740                                 s = "tcpdatalen";
1741                                 break;
1742                         case O_TCPMSS:
1743                                 s = "tcpmss";
1744                                 break;
1745                         case O_TCPWIN:
1746                                 s = "tcpwin";
1747                                 break;
1748                         default:
1749                                 s = "<unknown>";
1750                                 break;
1751                         }
1752                         bprintf(bp, " %s %u", s, cmd->arg1);
1753                 } else
1754                         print_newports(bp, insntod(cmd, u16), 0,
1755                             cmd->opcode);
1756                 break;
1757         case O_IPVER:
1758                 bprintf(bp, " ipver %u", cmd->arg1);
1759                 break;
1760         case O_IPPRECEDENCE:
1761                 bprintf(bp, " ipprecedence %u", cmd->arg1 >> 5);
1762                 break;
1763         case O_DSCP:
1764                 print_dscp(bp, insntod(cmd, u32));
1765                 break;
1766         case O_IPOPT:
1767                 print_flags(bp, "ipoptions", cmd, f_ipopts);
1768                 break;
1769         case O_IPTOS:
1770                 print_flags(bp, "iptos", cmd, f_iptos);
1771                 break;
1772         case O_ICMPTYPE:
1773                 print_icmptypes(bp, insntod(cmd, u32));
1774                 break;
1775         case O_ESTAB:
1776                 bprintf(bp, " established");
1777                 break;
1778         case O_TCPFLAGS:
1779                 print_flags(bp, "tcpflags", cmd, f_tcpflags);
1780                 break;
1781         case O_TCPOPTS:
1782                 print_flags(bp, "tcpoptions", cmd, f_tcpopts);
1783                 break;
1784         case O_TCPACK:
1785                 bprintf(bp, " tcpack %d",
1786                     ntohl(insntod(cmd, u32)->d[0]));
1787                 break;
1788         case O_TCPSEQ:
1789                 bprintf(bp, " tcpseq %d",
1790                     ntohl(insntod(cmd, u32)->d[0]));
1791                 break;
1792         case O_UID:
1793                 pwd = getpwuid(insntod(cmd, u32)->d[0]);
1794                 if (pwd != NULL)
1795                         bprintf(bp, " uid %s", pwd->pw_name);
1796                 else
1797                         bprintf(bp, " uid %u",
1798                             insntod(cmd, u32)->d[0]);
1799                 break;
1800         case O_GID:
1801                 grp = getgrgid(insntod(cmd, u32)->d[0]);
1802                 if (grp != NULL)
1803                         bprintf(bp, " gid %s", grp->gr_name);
1804                 else
1805                         bprintf(bp, " gid %u",
1806                             insntod(cmd, u32)->d[0]);
1807                 break;
1808         case O_JAIL:
1809                 bprintf(bp, " jail %d", insntod(cmd, u32)->d[0]);
1810                 break;
1811         case O_VERREVPATH:
1812                 bprintf(bp, " verrevpath");
1813                 break;
1814         case O_VERSRCREACH:
1815                 bprintf(bp, " versrcreach");
1816                 break;
1817         case O_ANTISPOOF:
1818                 bprintf(bp, " antispoof");
1819                 break;
1820         case O_IPSEC:
1821                 bprintf(bp, " ipsec");
1822                 break;
1823         case O_NOP:
1824                 bprintf(bp, " // %s", (const char *)(cmd + 1));
1825                 break;
1826         case O_KEEP_STATE:
1827                 if (state->flags & HAVE_PROBE_STATE)
1828                         bprintf(bp, " keep-state");
1829                 else
1830                         bprintf(bp, " record-state");
1831                 bprintf(bp, " :%s",
1832                     object_search_ctlv(fo->tstate, cmd->arg1,
1833                     IPFW_TLV_STATE_NAME));
1834                 break;
1835         case O_LIMIT:
1836                 if (state->flags & HAVE_PROBE_STATE)
1837                         bprintf(bp, " limit");
1838                 else
1839                         bprintf(bp, " set-limit");
1840                 print_limit_mask(bp, insntod(cmd, limit));
1841                 bprintf(bp, " :%s",
1842                     object_search_ctlv(fo->tstate, cmd->arg1,
1843                     IPFW_TLV_STATE_NAME));
1844                 break;
1845         case O_IP6:
1846                 if (state->flags & HAVE_PROTO)
1847                         bprintf(bp, " proto");
1848                 bprintf(bp, " ip6");
1849                 break;
1850         case O_IP4:
1851                 if (state->flags & HAVE_PROTO)
1852                         bprintf(bp, " proto");
1853                 bprintf(bp, " ip4");
1854                 break;
1855         case O_ICMP6TYPE:
1856                 print_icmp6types(bp, insntod(cmd, u32));
1857                 break;
1858         case O_EXT_HDR:
1859                 print_ext6hdr(bp, cmd);
1860                 break;
1861         case O_TAGGED:
1862                 if (F_LEN(cmd) == 1)
1863                         bprint_uint_arg(bp, " tagged ", cmd->arg1);
1864                 else
1865                         print_newports(bp, insntod(cmd, u16),
1866                                     0, O_TAGGED);
1867                 break;
1868         case O_SKIP_ACTION:
1869                 bprintf(bp, " defer-immediate-action");
1870                 break;
1871         case O_MARK:
1872                 bprintf(bp, " mark");
1873                 if (cmd->arg1 == IP_FW_TARG)
1874                         bprintf(bp, " tablearg");
1875                 else
1876                         bprintf(bp, " %#x",
1877                             ((const ipfw_insn_u32 *)cmd)->d[0]);
1878
1879                 if (((const ipfw_insn_u32 *)cmd)->d[1] != 0xFFFFFFFF)
1880                         bprintf(bp, ":%#x",
1881                             ((const ipfw_insn_u32 *)cmd)->d[1]);
1882                 break;
1883
1884         default:
1885                 bprintf(bp, " [opcode %d len %d]", cmd->opcode,
1886                     cmd->len);
1887         }
1888         if (cmd->len & F_OR) {
1889                 bprintf(bp, " or");
1890                 state->or_block = 1;
1891         } else if (state->or_block != 0) {
1892                 bprintf(bp, " }");
1893                 state->or_block = 0;
1894         }
1895         mark_printed(state, cmd);
1896
1897         return (1);
1898 }
1899
1900 static ipfw_insn *
1901 print_opcode(struct buf_pr *bp, struct format_opts *fo,
1902     struct show_state *state, int opcode)
1903 {
1904         ipfw_insn *cmd;
1905         int l;
1906
1907         for (l = state->rule->act_ofs, cmd = state->rule->cmd;
1908             l > 0; l -= F_LEN(cmd), cmd += F_LEN(cmd)) {
1909                 /* We use zero opcode to print the rest of options */
1910                 if (opcode >= 0 && cmd->opcode != opcode)
1911                         continue;
1912                 /*
1913                  * Skip O_NOP, when we printing the rest
1914                  * of options, it will be handled separately.
1915                  */
1916                 if (cmd->opcode == O_NOP && opcode != O_NOP)
1917                         continue;
1918                 if (!print_instruction(bp, fo, state, cmd))
1919                         continue;
1920                 return (cmd);
1921         }
1922         return (NULL);
1923 }
1924
1925 static void
1926 print_fwd(struct buf_pr *bp, const ipfw_insn *cmd)
1927 {
1928         char buf[INET6_ADDRSTRLEN + IF_NAMESIZE + 2];
1929         const ipfw_insn_sa6 *sa6;
1930         const ipfw_insn_sa *sa;
1931         uint16_t port;
1932
1933         if (cmd->opcode == O_FORWARD_IP) {
1934                 sa = insntod(cmd, sa);
1935                 port = sa->sa.sin_port;
1936                 if (sa->sa.sin_addr.s_addr == INADDR_ANY)
1937                         bprintf(bp, "fwd tablearg");
1938                 else
1939                         bprintf(bp, "fwd %s", inet_ntoa(sa->sa.sin_addr));
1940         } else {
1941                 sa6 = insntod(cmd, sa6);
1942                 port = sa6->sa.sin6_port;
1943                 bprintf(bp, "fwd ");
1944                 if (getnameinfo((const struct sockaddr *)&sa6->sa,
1945                     sizeof(struct sockaddr_in6), buf, sizeof(buf), NULL, 0,
1946                     NI_NUMERICHOST) == 0)
1947                         bprintf(bp, "%s", buf);
1948         }
1949         if (port != 0)
1950                 bprintf(bp, ",%u", port);
1951 }
1952
1953 static int
1954 print_action_instruction(struct buf_pr *bp, const struct format_opts *fo,
1955     struct show_state *state, const ipfw_insn *cmd)
1956 {
1957         const char *s;
1958
1959         if (is_printed_opcode(state, cmd))
1960                 return (0);
1961         switch (cmd->opcode) {
1962         case O_CHECK_STATE:
1963                 bprintf(bp, "check-state");
1964                 if (cmd->arg1 != 0)
1965                         s = object_search_ctlv(fo->tstate, cmd->arg1,
1966                             IPFW_TLV_STATE_NAME);
1967                 else
1968                         s = NULL;
1969                 bprintf(bp, " :%s", s ? s: "any");
1970                 break;
1971         case O_ACCEPT:
1972                 bprintf(bp, "allow");
1973                 break;
1974         case O_COUNT:
1975                 bprintf(bp, "count");
1976                 break;
1977         case O_DENY:
1978                 bprintf(bp, "deny");
1979                 break;
1980         case O_REJECT:
1981                 if (cmd->arg1 == ICMP_REJECT_RST)
1982                         bprintf(bp, "reset");
1983                 else if (cmd->arg1 == ICMP_REJECT_ABORT)
1984                         bprintf(bp, "abort");
1985                 else if (cmd->arg1 == ICMP_UNREACH_HOST)
1986                         bprintf(bp, "reject");
1987                 else if (cmd->arg1 == ICMP_UNREACH_NEEDFRAG &&
1988                     cmd->len == F_INSN_SIZE(ipfw_insn_u16))
1989                         bprintf(bp, "needfrag %u",
1990                             ((const ipfw_insn_u16 *)cmd)->ports[0]);
1991                 else
1992                         print_reject_code(bp, cmd->arg1);
1993                 break;
1994         case O_UNREACH6:
1995                 if (cmd->arg1 == ICMP6_UNREACH_RST)
1996                         bprintf(bp, "reset6");
1997                 else if (cmd->arg1 == ICMP6_UNREACH_ABORT)
1998                         bprintf(bp, "abort6");
1999                 else
2000                         print_unreach6_code(bp, cmd->arg1);
2001                 break;
2002         case O_SKIPTO:
2003                 bprint_uint_arg(bp, "skipto ", cmd->arg1);
2004                 break;
2005         case O_PIPE:
2006                 bprint_uint_arg(bp, "pipe ", cmd->arg1);
2007                 break;
2008         case O_QUEUE:
2009                 bprint_uint_arg(bp, "queue ", cmd->arg1);
2010                 break;
2011         case O_DIVERT:
2012                 bprint_uint_arg(bp, "divert ", cmd->arg1);
2013                 break;
2014         case O_TEE:
2015                 bprint_uint_arg(bp, "tee ", cmd->arg1);
2016                 break;
2017         case O_NETGRAPH:
2018                 bprint_uint_arg(bp, "netgraph ", cmd->arg1);
2019                 break;
2020         case O_NGTEE:
2021                 bprint_uint_arg(bp, "ngtee ", cmd->arg1);
2022                 break;
2023         case O_FORWARD_IP:
2024         case O_FORWARD_IP6:
2025                 print_fwd(bp, cmd);
2026                 break;
2027         case O_LOG:
2028                 if (insntod(cmd, log)->max_log > 0)
2029                         bprintf(bp, " log logamount %d",
2030                             insntod(cmd, log)->max_log);
2031                 else
2032                         bprintf(bp, " log");
2033                 break;
2034         case O_ALTQ:
2035 #ifndef NO_ALTQ
2036                 print_altq_cmd(bp, insntod(cmd, altq));
2037 #endif
2038                 break;
2039         case O_TAG:
2040                 bprint_uint_arg(bp, cmd->len & F_NOT ? " untag ":
2041                     " tag ", cmd->arg1);
2042                 break;
2043         case O_NAT:
2044                 if (cmd->arg1 != IP_FW_NAT44_GLOBAL)
2045                         bprint_uint_arg(bp, "nat ", cmd->arg1);
2046                 else
2047                         bprintf(bp, "nat global");
2048                 break;
2049         case O_SETFIB:
2050                 if (cmd->arg1 == IP_FW_TARG)
2051                         bprint_uint_arg(bp, "setfib ", cmd->arg1);
2052                 else
2053                         bprintf(bp, "setfib %u", cmd->arg1 & 0x7FFF);
2054                 break;
2055         case O_EXTERNAL_ACTION:
2056                 /*
2057                  * The external action can consists of two following
2058                  * each other opcodes - O_EXTERNAL_ACTION and
2059                  * O_EXTERNAL_INSTANCE. The first contains the ID of
2060                  * name of external action. The second contains the ID
2061                  * of name of external action instance.
2062                  * NOTE: in case when external action has no named
2063                  * instances support, the second opcode isn't needed.
2064                  */
2065                 state->eaction = cmd;
2066                 s = object_search_ctlv(fo->tstate, cmd->arg1,
2067                     IPFW_TLV_EACTION);
2068                 if (match_token(rule_eactions, s) != -1)
2069                         bprintf(bp, "%s", s);
2070                 else
2071                         bprintf(bp, "eaction %s", s);
2072                 break;
2073         case O_EXTERNAL_INSTANCE:
2074                 if (state->eaction == NULL)
2075                         break;
2076                 /*
2077                  * XXX: we need to teach ipfw(9) to rewrite opcodes
2078                  * in the user buffer on rule addition. When we add
2079                  * the rule, we specify zero TLV type for
2080                  * O_EXTERNAL_INSTANCE object. To show correct
2081                  * rule after `ipfw add` we need to search instance
2082                  * name with zero type. But when we do `ipfw show`
2083                  * we calculate TLV type using IPFW_TLV_EACTION_NAME()
2084                  * macro.
2085                  */
2086                 s = object_search_ctlv(fo->tstate, cmd->arg1, 0);
2087                 if (s == NULL)
2088                         s = object_search_ctlv(fo->tstate,
2089                             cmd->arg1, IPFW_TLV_EACTION_NAME(
2090                             state->eaction->arg1));
2091                 bprintf(bp, " %s", s);
2092                 break;
2093         case O_EXTERNAL_DATA:
2094                 if (state->eaction == NULL)
2095                         break;
2096                 /*
2097                  * Currently we support data formatting only for
2098                  * external data with datalen u16. For unknown data
2099                  * print its size in bytes.
2100                  */
2101                 if (cmd->len == F_INSN_SIZE(ipfw_insn))
2102                         bprintf(bp, " %u", cmd->arg1);
2103                 else
2104                         bprintf(bp, " %ubytes",
2105                             cmd->len * sizeof(uint32_t));
2106                 break;
2107         case O_SETDSCP:
2108                 if (cmd->arg1 == IP_FW_TARG) {
2109                         bprintf(bp, "setdscp tablearg");
2110                         break;
2111                 }
2112                 s = match_value(f_ipdscp, cmd->arg1 & 0x3F);
2113                 if (s != NULL)
2114                         bprintf(bp, "setdscp %s", s);
2115                 else
2116                         bprintf(bp, "setdscp %u", cmd->arg1 & 0x3F);
2117                 break;
2118         case O_REASS:
2119                 bprintf(bp, "reass");
2120                 break;
2121         case O_CALLRETURN:
2122                 if (cmd->len & F_NOT)
2123                         bprintf(bp, "return");
2124                 else
2125                         bprint_uint_arg(bp, "call ", cmd->arg1);
2126                 break;
2127         case O_SETMARK:
2128                 if (cmd->arg1 == IP_FW_TARG) {
2129                         bprintf(bp, "setmark tablearg");
2130                         break;
2131                 }
2132                 bprintf(bp, "setmark %#x", ((const ipfw_insn_u32 *)cmd)->d[0]);
2133                 break;
2134         default:
2135                 bprintf(bp, "** unrecognized action %d len %d ",
2136                         cmd->opcode, cmd->len);
2137         }
2138         mark_printed(state, cmd);
2139
2140         return (1);
2141 }
2142
2143
2144 static ipfw_insn *
2145 print_action(struct buf_pr *bp, struct format_opts *fo,
2146     struct show_state *state, uint8_t opcode)
2147 {
2148         ipfw_insn *cmd;
2149         int l;
2150
2151         for (l = state->rule->cmd_len - state->rule->act_ofs,
2152             cmd = ACTION_PTR(state->rule); l > 0;
2153             l -= F_LEN(cmd), cmd += F_LEN(cmd)) {
2154                 if (cmd->opcode != opcode)
2155                         continue;
2156                 if (!print_action_instruction(bp, fo, state, cmd))
2157                         continue;
2158                 return (cmd);
2159         }
2160         return (NULL);
2161 }
2162
2163 static void
2164 print_proto(struct buf_pr *bp, struct format_opts *fo,
2165     struct show_state *state)
2166 {
2167         ipfw_insn *cmd;
2168         int l, proto, ip4, ip6;
2169
2170         /* Count all O_PROTO, O_IP4, O_IP6 instructions. */
2171         proto = ip4 = ip6 = 0;
2172         for (l = state->rule->act_ofs, cmd = state->rule->cmd;
2173             l > 0; l -= F_LEN(cmd), cmd += F_LEN(cmd)) {
2174                 switch (cmd->opcode) {
2175                 case O_PROTO:
2176                         proto++;
2177                         break;
2178                 case O_IP4:
2179                         ip4 = 1;
2180                         if (cmd->len & F_OR)
2181                                 ip4++;
2182                         break;
2183                 case O_IP6:
2184                         ip6 = 1;
2185                         if (cmd->len & F_OR)
2186                                 ip6++;
2187                         break;
2188                 default:
2189                         continue;
2190                 }
2191         }
2192         if (proto == 0 && ip4 == 0 && ip6 == 0) {
2193                 state->proto = IPPROTO_IP;
2194                 state->flags |= HAVE_PROTO;
2195                 bprintf(bp, " ip");
2196                 return;
2197         }
2198         /* To handle the case { ip4 or ip6 }, print opcode with F_OR first */
2199         cmd = NULL;
2200         if (ip4 || ip6)
2201                 cmd = print_opcode(bp, fo, state, ip4 > ip6 ? O_IP4: O_IP6);
2202         if (cmd != NULL && (cmd->len & F_OR))
2203                 cmd = print_opcode(bp, fo, state, ip4 > ip6 ? O_IP6: O_IP4);
2204         if (cmd == NULL || (cmd->len & F_OR))
2205                 for (l = proto; l > 0; l--) {
2206                         cmd = print_opcode(bp, fo, state, O_PROTO);
2207                         if (cmd == NULL || (cmd->len & F_OR) == 0)
2208                                 break;
2209                 }
2210         /* Initialize proto, it is used by print_newports() */
2211         state->flags |= HAVE_PROTO;
2212         if (state->proto == 0 && ip6 != 0)
2213                 state->proto = IPPROTO_IPV6;
2214 }
2215
2216 static int
2217 match_opcode(int opcode, const int opcodes[], size_t nops)
2218 {
2219         size_t i;
2220
2221         for (i = 0; i < nops; i++)
2222                 if (opcode == opcodes[i])
2223                         return (1);
2224         return (0);
2225 }
2226
2227 static void
2228 print_address(struct buf_pr *bp, struct format_opts *fo,
2229     struct show_state *state, const int opcodes[], size_t nops, int portop,
2230     int flag)
2231 {
2232         ipfw_insn *cmd;
2233         int count, l, portcnt, pf;
2234
2235         count = portcnt = 0;
2236         for (l = state->rule->act_ofs, cmd = state->rule->cmd;
2237             l > 0; l -= F_LEN(cmd), cmd += F_LEN(cmd)) {
2238                 if (match_opcode(cmd->opcode, opcodes, nops))
2239                         count++;
2240                 else if (cmd->opcode == portop)
2241                         portcnt++;
2242         }
2243         if (count == 0)
2244                 bprintf(bp, " any");
2245         for (l = state->rule->act_ofs, cmd = state->rule->cmd;
2246             l > 0 && count > 0; l -= F_LEN(cmd), cmd += F_LEN(cmd)) {
2247                 if (!match_opcode(cmd->opcode, opcodes, nops))
2248                         continue;
2249                 print_instruction(bp, fo, state, cmd);
2250                 if ((cmd->len & F_OR) == 0)
2251                         break;
2252                 count--;
2253         }
2254         /*
2255          * If several O_IP_?PORT opcodes specified, leave them to the
2256          * options section.
2257          */
2258         if (portcnt == 1) {
2259                 for (l = state->rule->act_ofs, cmd = state->rule->cmd, pf = 0;
2260                     l > 0; l -= F_LEN(cmd), cmd += F_LEN(cmd)) {
2261                         if (cmd->opcode != portop) {
2262                                 pf = (cmd->len & F_OR);
2263                                 continue;
2264                         }
2265                         /* Print opcode iff it is not in OR block. */
2266                         if (pf == 0 && (cmd->len & F_OR) == 0)
2267                                 print_instruction(bp, fo, state, cmd);
2268                         break;
2269                 }
2270         }
2271         state->flags |= flag;
2272 }
2273
2274 static const int action_opcodes[] = {
2275         O_CHECK_STATE, O_ACCEPT, O_COUNT, O_DENY, O_REJECT,
2276         O_UNREACH6, O_SKIPTO, O_PIPE, O_QUEUE, O_DIVERT, O_TEE,
2277         O_NETGRAPH, O_NGTEE, O_FORWARD_IP, O_FORWARD_IP6, O_NAT,
2278         O_SETFIB, O_SETDSCP, O_REASS, O_CALLRETURN, O_SETMARK,
2279         /* keep the following opcodes at the end of the list */
2280         O_EXTERNAL_ACTION, O_EXTERNAL_INSTANCE, O_EXTERNAL_DATA
2281 };
2282
2283 static const int modifier_opcodes[] = {
2284         O_LOG, O_ALTQ, O_TAG
2285 };
2286
2287 static const int src_opcodes[] = {
2288         O_IP_SRC, O_IP_SRC_LOOKUP, O_IP_SRC_MASK, O_IP_SRC_ME,
2289         O_IP_SRC_SET, O_IP6_SRC, O_IP6_SRC_MASK, O_IP6_SRC_ME
2290 };
2291
2292 static const int dst_opcodes[] = {
2293         O_IP_DST, O_IP_DST_LOOKUP, O_IP_DST_MASK, O_IP_DST_ME,
2294         O_IP_DST_SET, O_IP6_DST, O_IP6_DST_MASK, O_IP6_DST_ME
2295 };
2296
2297 static void
2298 show_static_rule(struct cmdline_opts *co, struct format_opts *fo,
2299     struct buf_pr *bp, struct ip_fw_rule *rule, struct ip_fw_bcounter *cntr)
2300 {
2301         static int twidth = 0;
2302         struct show_state state;
2303         ipfw_insn *cmd;
2304         size_t i;
2305
2306         /* Print # DISABLED or skip the rule */
2307         if ((fo->set_mask & (1 << rule->set)) == 0) {
2308                 /* disabled mask */
2309                 if (!co->show_sets)
2310                         return;
2311                 else
2312                         bprintf(bp, "# DISABLED ");
2313         }
2314         if (init_show_state(&state, rule) != 0) {
2315                 warn("init_show_state() failed");
2316                 return;
2317         }
2318         bprintf(bp, "%05u ", rule->rulenum);
2319
2320         /* only if counters are available */
2321         if (cntr != NULL) {
2322                 /* Print counters if enabled */
2323                 if (fo->pcwidth > 0 || fo->bcwidth > 0) {
2324                         pr_u64(bp, &cntr->pcnt, fo->pcwidth);
2325                         pr_u64(bp, &cntr->bcnt, fo->bcwidth);
2326                 }
2327
2328                 /* Print timestamp */
2329                 if (co->do_time == TIMESTAMP_NUMERIC)
2330                         bprintf(bp, "%10u ", cntr->timestamp);
2331                 else if (co->do_time == TIMESTAMP_STRING) {
2332                         char timestr[30];
2333                         time_t t = (time_t)0;
2334
2335                         if (twidth == 0) {
2336                                 strcpy(timestr, ctime(&t));
2337                                 *strchr(timestr, '\n') = '\0';
2338                                 twidth = strlen(timestr);
2339                         }
2340                         if (cntr->timestamp > 0) {
2341                                 t = _long_to_time(cntr->timestamp);
2342
2343                                 strcpy(timestr, ctime(&t));
2344                                 *strchr(timestr, '\n') = '\0';
2345                                 bprintf(bp, "%s ", timestr);
2346                         } else {
2347                                 bprintf(bp, "%*s ", twidth, "");
2348                         }
2349                 }
2350         }
2351
2352         /* Print set number */
2353         if (co->show_sets)
2354                 bprintf(bp, "set %d ", rule->set);
2355
2356         /* Print the optional "match probability" */
2357         cmd = print_opcode(bp, fo, &state, O_PROB);
2358         /* Print rule action */
2359         for (i = 0; i < nitems(action_opcodes); i++) {
2360                 cmd = print_action(bp, fo, &state, action_opcodes[i]);
2361                 if (cmd == NULL)
2362                         continue;
2363                 /* Handle special cases */
2364                 switch (cmd->opcode) {
2365                 case O_CHECK_STATE:
2366                         goto end;
2367                 case O_EXTERNAL_ACTION:
2368                 case O_EXTERNAL_INSTANCE:
2369                         /* External action can have several instructions */
2370                         continue;
2371                 }
2372                 break;
2373         }
2374         /* Print rule modifiers */
2375         for (i = 0; i < nitems(modifier_opcodes); i++)
2376                 print_action(bp, fo, &state, modifier_opcodes[i]);
2377         /*
2378          * Print rule body
2379          */
2380         if (co->comment_only != 0)
2381                 goto end;
2382
2383         if (rule->flags & IPFW_RULE_JUSTOPTS) {
2384                 state.flags |= HAVE_PROTO | HAVE_SRCIP | HAVE_DSTIP;
2385                 goto justopts;
2386         }
2387
2388         print_proto(bp, fo, &state);
2389         if (co->do_compact != 0 && (rule->flags & IPFW_RULE_NOOPT))
2390                 goto justopts;
2391
2392         /* Print source */
2393         bprintf(bp, " from");
2394         print_address(bp, fo, &state, src_opcodes, nitems(src_opcodes),
2395             O_IP_SRCPORT, HAVE_SRCIP);
2396
2397         /* Print destination */
2398         bprintf(bp, " to");
2399         print_address(bp, fo, &state, dst_opcodes, nitems(dst_opcodes),
2400             O_IP_DSTPORT, HAVE_DSTIP);
2401
2402 justopts:
2403         /* Print the rest of options */
2404         while (print_opcode(bp, fo, &state, -1))
2405                 ;
2406 end:
2407         /* Print comment at the end */
2408         cmd = print_opcode(bp, fo, &state, O_NOP);
2409         if (co->comment_only != 0 && cmd == NULL)
2410                 bprintf(bp, " // ...");
2411         bprintf(bp, "\n");
2412         free_show_state(&state);
2413 }
2414
2415 static void
2416 show_dyn_state(struct cmdline_opts *co, struct format_opts *fo,
2417     struct buf_pr *bp, ipfw_dyn_rule *d)
2418 {
2419         struct protoent *pe;
2420         struct in_addr a;
2421         uint16_t rulenum;
2422         char buf[INET6_ADDRSTRLEN];
2423
2424         if (d->expire == 0 && d->dyn_type != O_LIMIT_PARENT)
2425                 return;
2426
2427         bcopy(&d->rule, &rulenum, sizeof(rulenum));
2428         bprintf(bp, "%05d", rulenum);
2429         if (fo->pcwidth > 0 || fo->bcwidth > 0) {
2430                 bprintf(bp, " ");
2431                 pr_u64(bp, &d->pcnt, fo->pcwidth);
2432                 pr_u64(bp, &d->bcnt, fo->bcwidth);
2433                 bprintf(bp, "(%ds)", d->expire);
2434         }
2435         switch (d->dyn_type) {
2436         case O_LIMIT_PARENT:
2437                 bprintf(bp, " PARENT %d", d->count);
2438                 break;
2439         case O_LIMIT:
2440                 bprintf(bp, " LIMIT");
2441                 break;
2442         case O_KEEP_STATE: /* bidir, no mask */
2443                 bprintf(bp, " STATE");
2444                 break;
2445         }
2446
2447         if ((pe = getprotobynumber(d->id.proto)) != NULL)
2448                 bprintf(bp, " %s", pe->p_name);
2449         else
2450                 bprintf(bp, " proto %u", d->id.proto);
2451
2452         if (d->id.addr_type == 4) {
2453                 a.s_addr = htonl(d->id.src_ip);
2454                 bprintf(bp, " %s %d", inet_ntoa(a), d->id.src_port);
2455
2456                 a.s_addr = htonl(d->id.dst_ip);
2457                 bprintf(bp, " <-> %s %d", inet_ntoa(a), d->id.dst_port);
2458         } else if (d->id.addr_type == 6) {
2459                 bprintf(bp, " %s %d", inet_ntop(AF_INET6, &d->id.src_ip6, buf,
2460                     sizeof(buf)), d->id.src_port);
2461                 bprintf(bp, " <-> %s %d", inet_ntop(AF_INET6, &d->id.dst_ip6,
2462                     buf, sizeof(buf)), d->id.dst_port);
2463         } else
2464                 bprintf(bp, " UNKNOWN <-> UNKNOWN");
2465         if (d->kidx != 0)
2466                 bprintf(bp, " :%s", object_search_ctlv(fo->tstate,
2467                     d->kidx, IPFW_TLV_STATE_NAME));
2468
2469 #define BOTH_SYN        (TH_SYN | (TH_SYN << 8))
2470 #define BOTH_FIN        (TH_FIN | (TH_FIN << 8))
2471         if (co->verbose) {
2472                 bprintf(bp, " state 0x%08x%s", d->state,
2473                     d->state ? " ": ",");
2474                 if (d->state & IPFW_DYN_ORPHANED)
2475                         bprintf(bp, "ORPHANED,");
2476                 if ((d->state & BOTH_SYN) == BOTH_SYN)
2477                         bprintf(bp, "BOTH_SYN,");
2478                 else {
2479                         if (d->state & TH_SYN)
2480                                 bprintf(bp, "F_SYN,");
2481                         if (d->state & (TH_SYN << 8))
2482                                 bprintf(bp, "R_SYN,");
2483                 }
2484                 if ((d->state & BOTH_FIN) == BOTH_FIN)
2485                         bprintf(bp, "BOTH_FIN,");
2486                 else {
2487                         if (d->state & TH_FIN)
2488                                 bprintf(bp, "F_FIN,");
2489                         if (d->state & (TH_FIN << 8))
2490                                 bprintf(bp, "R_FIN,");
2491                 }
2492                 bprintf(bp, " f_ack 0x%x, r_ack 0x%x", d->ack_fwd,
2493                     d->ack_rev);
2494         }
2495 }
2496
2497 static int
2498 do_range_cmd(int cmd, ipfw_range_tlv *rt)
2499 {
2500         ipfw_range_header rh;
2501         size_t sz;
2502
2503         memset(&rh, 0, sizeof(rh));
2504         memcpy(&rh.range, rt, sizeof(*rt));
2505         rh.range.head.length = sizeof(*rt);
2506         rh.range.head.type = IPFW_TLV_RANGE;
2507         sz = sizeof(rh);
2508
2509         if (do_get3(cmd, &rh.opheader, &sz) != 0)
2510                 return (-1);
2511         /* Save number of matched objects */
2512         rt->new_set = rh.range.new_set;
2513         return (0);
2514 }
2515
2516 /*
2517  * This one handles all set-related commands
2518  *      ipfw set { show | enable | disable }
2519  *      ipfw set swap X Y
2520  *      ipfw set move X to Y
2521  *      ipfw set move rule X to Y
2522  */
2523 void
2524 ipfw_sets_handler(char *av[])
2525 {
2526         ipfw_range_tlv rt;
2527         const char *msg;
2528         size_t size;
2529         uint32_t masks[2];
2530         int i;
2531         uint16_t rulenum;
2532         uint8_t cmd;
2533
2534         av++;
2535         memset(&rt, 0, sizeof(rt));
2536
2537         if (av[0] == NULL)
2538                 errx(EX_USAGE, "set needs command");
2539         if (_substrcmp(*av, "show") == 0) {
2540                 struct format_opts fo;
2541                 ipfw_cfg_lheader *cfg;
2542
2543                 memset(&fo, 0, sizeof(fo));
2544                 if (ipfw_get_config(&g_co, &fo, &cfg, &size) != 0)
2545                         err(EX_OSERR, "requesting config failed");
2546
2547                 for (i = 0, msg = "disable"; i < RESVD_SET; i++)
2548                         if ((cfg->set_mask & (1<<i)) == 0) {
2549                                 printf("%s %d", msg, i);
2550                                 msg = "";
2551                         }
2552                 msg = (cfg->set_mask != (uint32_t)-1) ? " enable" : "enable";
2553                 for (i = 0; i < RESVD_SET; i++)
2554                         if ((cfg->set_mask & (1<<i)) != 0) {
2555                                 printf("%s %d", msg, i);
2556                                 msg = "";
2557                         }
2558                 printf("\n");
2559                 free(cfg);
2560         } else if (_substrcmp(*av, "swap") == 0) {
2561                 av++;
2562                 if ( av[0] == NULL || av[1] == NULL )
2563                         errx(EX_USAGE, "set swap needs 2 set numbers\n");
2564                 rt.set = atoi(av[0]);
2565                 rt.new_set = atoi(av[1]);
2566                 if (!isdigit(*(av[0])) || rt.set > RESVD_SET)
2567                         errx(EX_DATAERR, "invalid set number %s\n", av[0]);
2568                 if (!isdigit(*(av[1])) || rt.new_set > RESVD_SET)
2569                         errx(EX_DATAERR, "invalid set number %s\n", av[1]);
2570                 i = do_range_cmd(IP_FW_SET_SWAP, &rt);
2571         } else if (_substrcmp(*av, "move") == 0) {
2572                 av++;
2573                 if (av[0] && _substrcmp(*av, "rule") == 0) {
2574                         rt.flags = IPFW_RCFLAG_RANGE; /* move rules to new set */
2575                         cmd = IP_FW_XMOVE;
2576                         av++;
2577                 } else
2578                         cmd = IP_FW_SET_MOVE; /* Move set to new one */
2579                 if (av[0] == NULL || av[1] == NULL || av[2] == NULL ||
2580                                 av[3] != NULL ||  _substrcmp(av[1], "to") != 0)
2581                         errx(EX_USAGE, "syntax: set move [rule] X to Y\n");
2582                 rulenum = atoi(av[0]);
2583                 rt.new_set = atoi(av[2]);
2584                 if (cmd == IP_FW_XMOVE) {
2585                         rt.start_rule = rulenum;
2586                         rt.end_rule = rulenum;
2587                 } else
2588                         rt.set = rulenum;
2589                 rt.new_set = atoi(av[2]);
2590                 if (!isdigit(*(av[0])) || (cmd == 3 && rt.set > RESVD_SET) ||
2591                         (cmd == 2 && rt.start_rule == IPFW_DEFAULT_RULE) )
2592                         errx(EX_DATAERR, "invalid source number %s\n", av[0]);
2593                 if (!isdigit(*(av[2])) || rt.new_set > RESVD_SET)
2594                         errx(EX_DATAERR, "invalid dest. set %s\n", av[1]);
2595                 i = do_range_cmd(cmd, &rt);
2596                 if (i < 0)
2597                         err(EX_OSERR, "failed to move %s",
2598                             cmd == IP_FW_SET_MOVE ? "set": "rule");
2599         } else if (_substrcmp(*av, "disable") == 0 ||
2600                    _substrcmp(*av, "enable") == 0 ) {
2601                 int which = _substrcmp(*av, "enable") == 0 ? 1 : 0;
2602
2603                 av++;
2604                 masks[0] = masks[1] = 0;
2605
2606                 while (av[0]) {
2607                         if (isdigit(**av)) {
2608                                 i = atoi(*av);
2609                                 if (i < 0 || i > RESVD_SET)
2610                                         errx(EX_DATAERR,
2611                                             "invalid set number %d\n", i);
2612                                 masks[which] |= (1<<i);
2613                         } else if (_substrcmp(*av, "disable") == 0)
2614                                 which = 0;
2615                         else if (_substrcmp(*av, "enable") == 0)
2616                                 which = 1;
2617                         else
2618                                 errx(EX_DATAERR,
2619                                         "invalid set command %s\n", *av);
2620                         av++;
2621                 }
2622                 if ( (masks[0] & masks[1]) != 0 )
2623                         errx(EX_DATAERR,
2624                             "cannot enable and disable the same set\n");
2625
2626                 rt.set = masks[0];
2627                 rt.new_set = masks[1];
2628                 i = do_range_cmd(IP_FW_SET_ENABLE, &rt);
2629                 if (i)
2630                         warn("set enable/disable: setsockopt(IP_FW_SET_ENABLE)");
2631         } else
2632                 errx(EX_USAGE, "invalid set command %s\n", *av);
2633 }
2634
2635 void
2636 ipfw_sysctl_handler(char *av[], int which)
2637 {
2638         av++;
2639
2640         if (av[0] == NULL) {
2641                 warnx("missing keyword to enable/disable\n");
2642         } else if (_substrcmp(*av, "firewall") == 0) {
2643                 sysctlbyname("net.inet.ip.fw.enable", NULL, 0,
2644                     &which, sizeof(which));
2645                 sysctlbyname("net.inet6.ip6.fw.enable", NULL, 0,
2646                     &which, sizeof(which));
2647         } else if (_substrcmp(*av, "one_pass") == 0) {
2648                 sysctlbyname("net.inet.ip.fw.one_pass", NULL, 0,
2649                     &which, sizeof(which));
2650         } else if (_substrcmp(*av, "debug") == 0) {
2651                 sysctlbyname("net.inet.ip.fw.debug", NULL, 0,
2652                     &which, sizeof(which));
2653         } else if (_substrcmp(*av, "verbose") == 0) {
2654                 sysctlbyname("net.inet.ip.fw.verbose", NULL, 0,
2655                     &which, sizeof(which));
2656         } else if (_substrcmp(*av, "dyn_keepalive") == 0) {
2657                 sysctlbyname("net.inet.ip.fw.dyn_keepalive", NULL, 0,
2658                     &which, sizeof(which));
2659 #ifndef NO_ALTQ
2660         } else if (_substrcmp(*av, "altq") == 0) {
2661                 altq_set_enabled(which);
2662 #endif
2663         } else {
2664                 warnx("unrecognize enable/disable keyword: %s\n", *av);
2665         }
2666 }
2667
2668 typedef void state_cb(struct cmdline_opts *co, struct format_opts *fo,
2669     void *arg, void *state);
2670
2671 static void
2672 prepare_format_dyn(struct cmdline_opts *co, struct format_opts *fo,
2673     void *arg __unused, void *_state)
2674 {
2675         ipfw_dyn_rule *d;
2676         int width;
2677         uint8_t set;
2678
2679         d = (ipfw_dyn_rule *)_state;
2680         /* Count _ALL_ states */
2681         fo->dcnt++;
2682
2683         if (fo->show_counters == 0)
2684                 return;
2685
2686         if (co->use_set) {
2687                 /* skip states from another set */
2688                 bcopy((char *)&d->rule + sizeof(uint16_t), &set,
2689                     sizeof(uint8_t));
2690                 if (set != co->use_set - 1)
2691                         return;
2692         }
2693
2694         width = pr_u64(NULL, &d->pcnt, 0);
2695         if (width > fo->pcwidth)
2696                 fo->pcwidth = width;
2697
2698         width = pr_u64(NULL, &d->bcnt, 0);
2699         if (width > fo->bcwidth)
2700                 fo->bcwidth = width;
2701 }
2702
2703 static int
2704 foreach_state(struct cmdline_opts *co, struct format_opts *fo,
2705     caddr_t base, size_t sz, state_cb dyn_bc, void *dyn_arg)
2706 {
2707         int ttype;
2708         state_cb *fptr;
2709         void *farg;
2710         ipfw_obj_tlv *tlv;
2711         ipfw_obj_ctlv *ctlv;
2712
2713         fptr = NULL;
2714         ttype = 0;
2715
2716         while (sz > 0) {
2717                 ctlv = (ipfw_obj_ctlv *)base;
2718                 switch (ctlv->head.type) {
2719                 case IPFW_TLV_DYNSTATE_LIST:
2720                         base += sizeof(*ctlv);
2721                         sz -= sizeof(*ctlv);
2722                         ttype = IPFW_TLV_DYN_ENT;
2723                         fptr = dyn_bc;
2724                         farg = dyn_arg;
2725                         break;
2726                 default:
2727                         return (sz);
2728                 }
2729
2730                 while (sz > 0) {
2731                         tlv = (ipfw_obj_tlv *)base;
2732                         if (tlv->type != ttype)
2733                                 break;
2734
2735                         fptr(co, fo, farg, tlv + 1);
2736                         sz -= tlv->length;
2737                         base += tlv->length;
2738                 }
2739         }
2740
2741         return (sz);
2742 }
2743
2744 static void
2745 prepare_format_opts(struct cmdline_opts *co, struct format_opts *fo,
2746     ipfw_obj_tlv *rtlv, int rcnt, caddr_t dynbase, size_t dynsz)
2747 {
2748         int bcwidth, pcwidth, width;
2749         int n;
2750         struct ip_fw_bcounter *cntr;
2751         struct ip_fw_rule *r;
2752
2753         bcwidth = 0;
2754         pcwidth = 0;
2755         if (fo->show_counters != 0) {
2756                 for (n = 0; n < rcnt; n++,
2757                     rtlv = (ipfw_obj_tlv *)((caddr_t)rtlv + rtlv->length)) {
2758                         cntr = (struct ip_fw_bcounter *)(rtlv + 1);
2759                         r = (struct ip_fw_rule *)((caddr_t)cntr + cntr->size);
2760                         /* skip rules from another set */
2761                         if (co->use_set && r->set != co->use_set - 1)
2762                                 continue;
2763
2764                         /* packet counter */
2765                         width = pr_u64(NULL, &cntr->pcnt, 0);
2766                         if (width > pcwidth)
2767                                 pcwidth = width;
2768
2769                         /* byte counter */
2770                         width = pr_u64(NULL, &cntr->bcnt, 0);
2771                         if (width > bcwidth)
2772                                 bcwidth = width;
2773                 }
2774         }
2775         fo->bcwidth = bcwidth;
2776         fo->pcwidth = pcwidth;
2777
2778         fo->dcnt = 0;
2779         if (co->do_dynamic && dynsz > 0)
2780                 foreach_state(co, fo, dynbase, dynsz, prepare_format_dyn, NULL);
2781 }
2782
2783 static int
2784 list_static_range(struct cmdline_opts *co, struct format_opts *fo,
2785     struct buf_pr *bp, ipfw_obj_tlv *rtlv, int rcnt)
2786 {
2787         int n, seen;
2788         struct ip_fw_rule *r;
2789         struct ip_fw_bcounter *cntr;
2790
2791         for (n = seen = 0; n < rcnt; n++,
2792             rtlv = (ipfw_obj_tlv *)((caddr_t)rtlv + rtlv->length)) {
2793
2794                 if ((fo->show_counters | fo->show_time) != 0) {
2795                         cntr = (struct ip_fw_bcounter *)(rtlv + 1);
2796                         r = (struct ip_fw_rule *)((caddr_t)cntr + cntr->size);
2797                 } else {
2798                         cntr = NULL;
2799                         r = (struct ip_fw_rule *)(rtlv + 1);
2800                 }
2801                 if (r->rulenum > fo->last)
2802                         break;
2803                 if (co->use_set && r->set != co->use_set - 1)
2804                         continue;
2805                 if (r->rulenum >= fo->first && r->rulenum <= fo->last) {
2806                         show_static_rule(co, fo, bp, r, cntr);
2807                         printf("%s", bp->buf);
2808                         bp_flush(bp);
2809                         seen++;
2810                 }
2811         }
2812
2813         return (seen);
2814 }
2815
2816 static void
2817 list_dyn_state(struct cmdline_opts *co, struct format_opts *fo,
2818     void *_arg, void *_state)
2819 {
2820         uint16_t rulenum;
2821         uint8_t set;
2822         ipfw_dyn_rule *d;
2823         struct buf_pr *bp;
2824
2825         d = (ipfw_dyn_rule *)_state;
2826         bp = (struct buf_pr *)_arg;
2827
2828         bcopy(&d->rule, &rulenum, sizeof(rulenum));
2829         if (rulenum > fo->last)
2830                 return;
2831         if (co->use_set) {
2832                 bcopy((char *)&d->rule + sizeof(uint16_t),
2833                       &set, sizeof(uint8_t));
2834                 if (set != co->use_set - 1)
2835                         return;
2836         }
2837         if (rulenum >= fo->first) {
2838                 show_dyn_state(co, fo, bp, d);
2839                 printf("%s\n", bp->buf);
2840                 bp_flush(bp);
2841         }
2842 }
2843
2844 static int
2845 list_dyn_range(struct cmdline_opts *co, struct format_opts *fo,
2846     struct buf_pr *bp, caddr_t base, size_t sz)
2847 {
2848
2849         sz = foreach_state(co, fo, base, sz, list_dyn_state, bp);
2850         return (sz);
2851 }
2852
2853 void
2854 ipfw_list(int ac, char *av[], int show_counters)
2855 {
2856         ipfw_cfg_lheader *cfg;
2857         struct format_opts sfo;
2858         size_t sz;
2859         int error;
2860         int lac;
2861         char **lav;
2862         uint32_t rnum;
2863         char *endptr;
2864
2865         if (g_co.test_only) {
2866                 fprintf(stderr, "Testing only, list disabled\n");
2867                 return;
2868         }
2869         if (g_co.do_pipe) {
2870                 dummynet_list(ac, av, show_counters);
2871                 return;
2872         }
2873
2874         ac--;
2875         av++;
2876         memset(&sfo, 0, sizeof(sfo));
2877
2878         /* Determine rule range to request */
2879         if (ac > 0) {
2880                 for (lac = ac, lav = av; lac != 0; lac--) {
2881                         rnum = strtoul(*lav++, &endptr, 10);
2882                         if (sfo.first == 0 || rnum < sfo.first)
2883                                 sfo.first = rnum;
2884
2885                         if (*endptr == '-')
2886                                 rnum = strtoul(endptr + 1, &endptr, 10);
2887                         if (sfo.last == 0 || rnum > sfo.last)
2888                                 sfo.last = rnum;
2889                 }
2890         }
2891
2892         /* get configuration from kernel */
2893         cfg = NULL;
2894         sfo.show_counters = show_counters;
2895         sfo.show_time = g_co.do_time;
2896         if (g_co.do_dynamic != 2)
2897                 sfo.flags |= IPFW_CFG_GET_STATIC;
2898         if (g_co.do_dynamic != 0)
2899                 sfo.flags |= IPFW_CFG_GET_STATES;
2900         if ((sfo.show_counters | sfo.show_time) != 0)
2901                 sfo.flags |= IPFW_CFG_GET_COUNTERS;
2902         if (ipfw_get_config(&g_co, &sfo, &cfg, &sz) != 0)
2903                 err(EX_OSERR, "retrieving config failed");
2904
2905         error = ipfw_show_config(&g_co, &sfo, cfg, sz, ac, av);
2906
2907         free(cfg);
2908
2909         if (error != EX_OK)
2910                 exit(error);
2911 }
2912
2913 static int
2914 ipfw_show_config(struct cmdline_opts *co, struct format_opts *fo,
2915     ipfw_cfg_lheader *cfg, size_t sz, int ac, char *av[])
2916 {
2917         caddr_t dynbase;
2918         size_t dynsz;
2919         int rcnt;
2920         int exitval = EX_OK;
2921         int lac;
2922         char **lav;
2923         char *endptr;
2924         size_t readsz;
2925         struct buf_pr bp;
2926         ipfw_obj_ctlv *ctlv;
2927         ipfw_obj_tlv *rbase;
2928
2929         /*
2930          * Handle tablenames TLV first, if any
2931          */
2932         rbase = NULL;
2933         dynbase = NULL;
2934         dynsz = 0;
2935         readsz = sizeof(*cfg);
2936         rcnt = 0;
2937
2938         fo->set_mask = cfg->set_mask;
2939
2940         ctlv = (ipfw_obj_ctlv *)(cfg + 1);
2941         if (ctlv->head.type == IPFW_TLV_TBLNAME_LIST) {
2942                 object_sort_ctlv(ctlv);
2943                 fo->tstate = ctlv;
2944                 readsz += ctlv->head.length;
2945                 ctlv = (ipfw_obj_ctlv *)((caddr_t)ctlv + ctlv->head.length);
2946         }
2947
2948         if (cfg->flags & IPFW_CFG_GET_STATIC) {
2949                 /* We've requested static rules */
2950                 if (ctlv->head.type == IPFW_TLV_RULE_LIST) {
2951                         rbase = (ipfw_obj_tlv *)(ctlv + 1);
2952                         rcnt = ctlv->count;
2953                         readsz += ctlv->head.length;
2954                         ctlv = (ipfw_obj_ctlv *)((caddr_t)ctlv +
2955                             ctlv->head.length);
2956                 }
2957         }
2958
2959         if ((cfg->flags & IPFW_CFG_GET_STATES) && (readsz != sz))  {
2960                 /* We may have some dynamic states */
2961                 dynsz = sz - readsz;
2962                 /* Skip empty header */
2963                 if (dynsz != sizeof(ipfw_obj_ctlv))
2964                         dynbase = (caddr_t)ctlv;
2965                 else
2966                         dynsz = 0;
2967         }
2968
2969         prepare_format_opts(co, fo, rbase, rcnt, dynbase, dynsz);
2970         bp_alloc(&bp, 4096);
2971
2972         /* if no rule numbers were specified, list all rules */
2973         if (ac == 0) {
2974                 fo->first = 0;
2975                 fo->last = IPFW_DEFAULT_RULE;
2976                 if (cfg->flags & IPFW_CFG_GET_STATIC)
2977                         list_static_range(co, fo, &bp, rbase, rcnt);
2978
2979                 if (co->do_dynamic && dynsz > 0) {
2980                         printf("## Dynamic rules (%d %zu):\n", fo->dcnt,
2981                             dynsz);
2982                         list_dyn_range(co, fo, &bp, dynbase, dynsz);
2983                 }
2984
2985                 bp_free(&bp);
2986                 return (EX_OK);
2987         }
2988
2989         /* display specific rules requested on command line */
2990         for (lac = ac, lav = av; lac != 0; lac--) {
2991                 /* convert command line rule # */
2992                 fo->last = fo->first = strtoul(*lav++, &endptr, 10);
2993                 if (*endptr == '-')
2994                         fo->last = strtoul(endptr + 1, &endptr, 10);
2995                 if (*endptr) {
2996                         exitval = EX_USAGE;
2997                         warnx("invalid rule number: %s", *(lav - 1));
2998                         continue;
2999                 }
3000
3001                 if ((cfg->flags & IPFW_CFG_GET_STATIC) == 0)
3002                         continue;
3003
3004                 if (list_static_range(co, fo, &bp, rbase, rcnt) == 0) {
3005                         /* give precedence to other error(s) */
3006                         if (exitval == EX_OK)
3007                                 exitval = EX_UNAVAILABLE;
3008                         if (fo->first == fo->last)
3009                                 warnx("rule %u does not exist", fo->first);
3010                         else
3011                                 warnx("no rules in range %u-%u",
3012                                     fo->first, fo->last);
3013                 }
3014         }
3015
3016         if (co->do_dynamic && dynsz > 0) {
3017                 printf("## Dynamic rules:\n");
3018                 for (lac = ac, lav = av; lac != 0; lac--) {
3019                         fo->last = fo->first = strtoul(*lav++, &endptr, 10);
3020                         if (*endptr == '-')
3021                                 fo->last = strtoul(endptr+1, &endptr, 10);
3022                         if (*endptr)
3023                                 /* already warned */
3024                                 continue;
3025                         list_dyn_range(co, fo, &bp, dynbase, dynsz);
3026                 }
3027         }
3028
3029         bp_free(&bp);
3030         return (exitval);
3031 }
3032
3033
3034 /*
3035  * Retrieves current ipfw configuration of given type
3036  * and stores its pointer to @pcfg.
3037  *
3038  * Caller is responsible for freeing @pcfg.
3039  *
3040  * Returns 0 on success.
3041  */
3042
3043 static int
3044 ipfw_get_config(struct cmdline_opts *co, struct format_opts *fo,
3045     ipfw_cfg_lheader **pcfg, size_t *psize)
3046 {
3047         ipfw_cfg_lheader *cfg;
3048         size_t sz;
3049         int i;
3050
3051
3052         if (co->test_only != 0) {
3053                 fprintf(stderr, "Testing only, list disabled\n");
3054                 return (0);
3055         }
3056
3057         /* Start with some data size */
3058         sz = 4096;
3059         cfg = NULL;
3060
3061         for (i = 0; i < 16; i++) {
3062                 if (cfg != NULL)
3063                         free(cfg);
3064                 if ((cfg = calloc(1, sz)) == NULL)
3065                         return (ENOMEM);
3066
3067                 cfg->flags = fo->flags;
3068                 cfg->start_rule = fo->first;
3069                 cfg->end_rule = fo->last;
3070
3071                 if (do_get3(IP_FW_XGET, &cfg->opheader, &sz) != 0) {
3072                         if (errno != ENOMEM) {
3073                                 free(cfg);
3074                                 return (errno);
3075                         }
3076
3077                         /* Buffer size is not enough. Try to increase */
3078                         sz = sz * 2;
3079                         if (sz < cfg->size)
3080                                 sz = cfg->size;
3081                         continue;
3082                 }
3083
3084                 *pcfg = cfg;
3085                 *psize = sz;
3086                 return (0);
3087         }
3088
3089         free(cfg);
3090         return (ENOMEM);
3091 }
3092
3093 static int
3094 lookup_host (char *host, struct in_addr *ipaddr)
3095 {
3096         struct hostent *he;
3097
3098         if (!inet_aton(host, ipaddr)) {
3099                 if ((he = gethostbyname(host)) == NULL)
3100                         return(-1);
3101                 *ipaddr = *(struct in_addr *)he->h_addr_list[0];
3102         }
3103         return(0);
3104 }
3105
3106 struct tidx {
3107         ipfw_obj_ntlv *idx;
3108         uint32_t count;
3109         uint32_t size;
3110         uint16_t counter;
3111         uint8_t set;
3112 };
3113
3114 int
3115 ipfw_check_object_name(const char *name)
3116 {
3117         int c, i, l;
3118
3119         /*
3120          * Check that name is null-terminated and contains
3121          * valid symbols only. Valid mask is:
3122          * [a-zA-Z0-9\-_\.]{1,63}
3123          */
3124         l = strlen(name);
3125         if (l == 0 || l >= 64)
3126                 return (EINVAL);
3127         for (i = 0; i < l; i++) {
3128                 c = name[i];
3129                 if (isalpha(c) || isdigit(c) || c == '_' ||
3130                     c == '-' || c == '.')
3131                         continue;
3132                 return (EINVAL);
3133         }
3134         return (0);
3135 }
3136
3137 static const char *default_state_name = "default";
3138
3139 static int
3140 state_check_name(const char *name)
3141 {
3142
3143         if (ipfw_check_object_name(name) != 0)
3144                 return (EINVAL);
3145         if (strcmp(name, "any") == 0)
3146                 return (EINVAL);
3147         return (0);
3148 }
3149
3150 static int
3151 eaction_check_name(const char *name)
3152 {
3153
3154         if (ipfw_check_object_name(name) != 0)
3155                 return (EINVAL);
3156         /* Restrict some 'special' names */
3157         if (match_token(rule_actions, name) != -1 &&
3158             match_token(rule_action_params, name) != -1)
3159                 return (EINVAL);
3160         return (0);
3161 }
3162
3163 static uint16_t
3164 pack_object(struct tidx *tstate, const char *name, int otype)
3165 {
3166         ipfw_obj_ntlv *ntlv;
3167         uint32_t i;
3168
3169         for (i = 0; i < tstate->count; i++) {
3170                 if (strcmp(tstate->idx[i].name, name) != 0)
3171                         continue;
3172                 if (tstate->idx[i].set != tstate->set)
3173                         continue;
3174                 if (tstate->idx[i].head.type != otype)
3175                         continue;
3176
3177                 return (tstate->idx[i].idx);
3178         }
3179
3180         if (tstate->count + 1 > tstate->size) {
3181                 tstate->size += 4;
3182                 tstate->idx = realloc(tstate->idx, tstate->size *
3183                     sizeof(ipfw_obj_ntlv));
3184                 if (tstate->idx == NULL)
3185                         return (0);
3186         }
3187
3188         ntlv = &tstate->idx[i];
3189         memset(ntlv, 0, sizeof(ipfw_obj_ntlv));
3190         strlcpy(ntlv->name, name, sizeof(ntlv->name));
3191         ntlv->head.type = otype;
3192         ntlv->head.length = sizeof(ipfw_obj_ntlv);
3193         ntlv->set = tstate->set;
3194         ntlv->idx = ++tstate->counter;
3195         tstate->count++;
3196
3197         return (ntlv->idx);
3198 }
3199
3200 static uint16_t
3201 pack_table(struct tidx *tstate, const char *name)
3202 {
3203
3204         if (table_check_name(name) != 0)
3205                 return (0);
3206
3207         return (pack_object(tstate, name, IPFW_TLV_TBL_NAME));
3208 }
3209
3210 void
3211 fill_table(struct _ipfw_insn *cmd, char *av, uint8_t opcode,
3212     struct tidx *tstate)
3213 {
3214         uint32_t *d = ((ipfw_insn_u32 *)cmd)->d;
3215         uint16_t uidx;
3216         char *p;
3217
3218         if ((p = strchr(av + 6, ')')) == NULL)
3219                 errx(EX_DATAERR, "forgotten parenthesis: '%s'", av);
3220         *p = '\0';
3221         p = strchr(av + 6, ',');
3222         if (p)
3223                 *p++ = '\0';
3224
3225         if ((uidx = pack_table(tstate, av + 6)) == 0)
3226                 errx(EX_DATAERR, "Invalid table name: %s", av + 6);
3227
3228         cmd->opcode = opcode;
3229         cmd->arg1 = uidx;
3230         if (p) {
3231                 cmd->len |= F_INSN_SIZE(ipfw_insn_u32);
3232                 d[0] = strtoul(p, NULL, 0);
3233         } else
3234                 cmd->len |= F_INSN_SIZE(ipfw_insn);
3235 }
3236
3237
3238 /*
3239  * fills the addr and mask fields in the instruction as appropriate from av.
3240  * Update length as appropriate.
3241  * The following formats are allowed:
3242  *      me      returns O_IP_*_ME
3243  *      1.2.3.4         single IP address
3244  *      1.2.3.4:5.6.7.8 address:mask
3245  *      1.2.3.4/24      address/mask
3246  *      1.2.3.4/26{1,6,5,4,23}  set of addresses in a subnet
3247  * We can have multiple comma-separated address/mask entries.
3248  */
3249 static void
3250 fill_ip(ipfw_insn_ip *cmd, char *av, int cblen, struct tidx *tstate)
3251 {
3252         int len = 0;
3253         uint32_t *d = ((ipfw_insn_u32 *)cmd)->d;
3254
3255         cmd->o.len &= ~F_LEN_MASK;      /* zero len */
3256
3257         if (_substrcmp(av, "any") == 0)
3258                 return;
3259
3260         if (_substrcmp(av, "me") == 0) {
3261                 cmd->o.len |= F_INSN_SIZE(ipfw_insn);
3262                 return;
3263         }
3264
3265         if (strncmp(av, "table(", 6) == 0) {
3266                 fill_table(&cmd->o, av, O_IP_DST_LOOKUP, tstate);
3267                 return;
3268         }
3269
3270     while (av) {
3271         /*
3272          * After the address we can have '/' or ':' indicating a mask,
3273          * ',' indicating another address follows, '{' indicating a
3274          * set of addresses of unspecified size.
3275          */
3276         char *t = NULL, *p = strpbrk(av, "/:,{");
3277         int masklen;
3278         char md, nd = '\0';
3279
3280         CHECK_LENGTH(cblen, (int)F_INSN_SIZE(ipfw_insn) + 2 + len);
3281
3282         if (p) {
3283                 md = *p;
3284                 *p++ = '\0';
3285                 if ((t = strpbrk(p, ",{")) != NULL) {
3286                         nd = *t;
3287                         *t = '\0';
3288                 }
3289         } else
3290                 md = '\0';
3291
3292         if (lookup_host(av, (struct in_addr *)&d[0]) != 0)
3293                 errx(EX_NOHOST, "hostname ``%s'' unknown", av);
3294         switch (md) {
3295         case ':':
3296                 if (!inet_aton(p, (struct in_addr *)&d[1]))
3297                         errx(EX_DATAERR, "bad netmask ``%s''", p);
3298                 break;
3299         case '/':
3300                 masklen = atoi(p);
3301                 if (masklen == 0)
3302                         d[1] = htonl(0U);       /* mask */
3303                 else if (masklen > 32)
3304                         errx(EX_DATAERR, "bad width ``%s''", p);
3305                 else
3306                         d[1] = htonl(~0U << (32 - masklen));
3307                 break;
3308         case '{':       /* no mask, assume /24 and put back the '{' */
3309                 d[1] = htonl(~0U << (32 - 24));
3310                 *(--p) = md;
3311                 break;
3312
3313         case ',':       /* single address plus continuation */
3314                 *(--p) = md;
3315                 /* FALLTHROUGH */
3316         case 0:         /* initialization value */
3317         default:
3318                 d[1] = htonl(~0U);      /* force /32 */
3319                 break;
3320         }
3321         d[0] &= d[1];           /* mask base address with mask */
3322         if (t)
3323                 *t = nd;
3324         /* find next separator */
3325         if (p)
3326                 p = strpbrk(p, ",{");
3327         if (p && *p == '{') {
3328                 /*
3329                  * We have a set of addresses. They are stored as follows:
3330                  *   arg1       is the set size (powers of 2, 2..256)
3331                  *   addr       is the base address IN HOST FORMAT
3332                  *   mask..     is an array of arg1 bits (rounded up to
3333                  *              the next multiple of 32) with bits set
3334                  *              for each host in the map.
3335                  */
3336                 uint32_t *map = (uint32_t *)&cmd->mask;
3337                 int low, high;
3338                 int i = contigmask((uint8_t *)&(d[1]), 32);
3339
3340                 if (len > 0)
3341                         errx(EX_DATAERR, "address set cannot be in a list");
3342                 if (i < 24 || i > 31)
3343                         errx(EX_DATAERR, "invalid set with mask %d\n", i);
3344                 cmd->o.arg1 = 1<<(32-i);        /* map length           */
3345                 d[0] = ntohl(d[0]);             /* base addr in host format */
3346                 cmd->o.opcode = O_IP_DST_SET;   /* default */
3347                 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32) + (cmd->o.arg1+31)/32;
3348                 for (i = 0; i < (cmd->o.arg1+31)/32 ; i++)
3349                         map[i] = 0;     /* clear map */
3350
3351                 av = p + 1;
3352                 low = d[0] & 0xff;
3353                 high = low + cmd->o.arg1 - 1;
3354                 /*
3355                  * Here, i stores the previous value when we specify a range
3356                  * of addresses within a mask, e.g. 45-63. i = -1 means we
3357                  * have no previous value.
3358                  */
3359                 i = -1; /* previous value in a range */
3360                 while (isdigit(*av)) {
3361                         char *s;
3362                         int a = strtol(av, &s, 0);
3363
3364                         if (s == av) { /* no parameter */
3365                             if (*av != '}')
3366                                 errx(EX_DATAERR, "set not closed\n");
3367                             if (i != -1)
3368                                 errx(EX_DATAERR, "incomplete range %d-", i);
3369                             break;
3370                         }
3371                         if (a < low || a > high)
3372                             errx(EX_DATAERR, "addr %d out of range [%d-%d]\n",
3373                                 a, low, high);
3374                         a -= low;
3375                         if (i == -1)    /* no previous in range */
3376                             i = a;
3377                         else {          /* check that range is valid */
3378                             if (i > a)
3379                                 errx(EX_DATAERR, "invalid range %d-%d",
3380                                         i+low, a+low);
3381                             if (*s == '-')
3382                                 errx(EX_DATAERR, "double '-' in range");
3383                         }
3384                         for (; i <= a; i++)
3385                             map[i/32] |= 1<<(i & 31);
3386                         i = -1;
3387                         if (*s == '-')
3388                             i = a;
3389                         else if (*s == '}')
3390                             break;
3391                         av = s+1;
3392                 }
3393                 return;
3394         }
3395         av = p;
3396         if (av)                 /* then *av must be a ',' */
3397                 av++;
3398
3399         /* Check this entry */
3400         if (d[1] == 0) { /* "any", specified as x.x.x.x/0 */
3401                 /*
3402                  * 'any' turns the entire list into a NOP.
3403                  * 'not any' never matches, so it is removed from the
3404                  * list unless it is the only item, in which case we
3405                  * report an error.
3406                  */
3407                 if (cmd->o.len & F_NOT) {       /* "not any" never matches */
3408                         if (av == NULL && len == 0) /* only this entry */
3409                                 errx(EX_DATAERR, "not any never matches");
3410                 }
3411                 /* else do nothing and skip this entry */
3412                 return;
3413         }
3414         /* A single IP can be stored in an optimized format */
3415         if (d[1] == (uint32_t)~0 && av == NULL && len == 0) {
3416                 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32);
3417                 return;
3418         }
3419         len += 2;       /* two words... */
3420         d += 2;
3421     } /* end while */
3422     if (len + 1 > F_LEN_MASK)
3423         errx(EX_DATAERR, "address list too long");
3424     cmd->o.len |= len+1;
3425 }
3426
3427
3428 /* n2mask sets n bits of the mask */
3429 void
3430 n2mask(struct in6_addr *mask, int n)
3431 {
3432         static int      minimask[9] =
3433             { 0x00, 0x80, 0xc0, 0xe0, 0xf0, 0xf8, 0xfc, 0xfe, 0xff };
3434         u_char          *p;
3435
3436         memset(mask, 0, sizeof(struct in6_addr));
3437         p = (u_char *) mask;
3438         for (; n > 0; p++, n -= 8) {
3439                 if (n >= 8)
3440                         *p = 0xff;
3441                 else
3442                         *p = minimask[n];
3443         }
3444         return;
3445 }
3446
3447 static void
3448 fill_flags_cmd(ipfw_insn *cmd, enum ipfw_opcodes opcode,
3449         struct _s_x *flags, char *p)
3450 {
3451         char *e;
3452         uint32_t set = 0, clear = 0;
3453
3454         if (fill_flags(flags, p, &e, &set, &clear) != 0)
3455                 errx(EX_DATAERR, "invalid flag %s", e);
3456
3457         cmd->opcode = opcode;
3458         cmd->len =  (cmd->len & (F_NOT | F_OR)) | 1;
3459         cmd->arg1 = (set & 0xff) | ( (clear & 0xff) << 8);
3460 }
3461
3462
3463 void
3464 ipfw_delete(char *av[])
3465 {
3466         ipfw_range_tlv rt;
3467         char *sep;
3468         int i, j;
3469         int exitval = EX_OK;
3470         int do_set = 0;
3471
3472         av++;
3473         NEED1("missing rule specification");
3474         if ( *av && _substrcmp(*av, "set") == 0) {
3475                 /* Do not allow using the following syntax:
3476                  *      ipfw set N delete set M
3477                  */
3478                 if (g_co.use_set)
3479                         errx(EX_DATAERR, "invalid syntax");
3480                 do_set = 1;     /* delete set */
3481                 av++;
3482         }
3483
3484         /* Rule number */
3485         while (*av && isdigit(**av)) {
3486                 i = strtol(*av, &sep, 10);
3487                 j = i;
3488                 if (*sep== '-')
3489                         j = strtol(sep + 1, NULL, 10);
3490                 av++;
3491                 if (g_co.do_nat) {
3492                         exitval = ipfw_delete_nat(i);
3493                 } else if (g_co.do_pipe) {
3494                         exitval = ipfw_delete_pipe(g_co.do_pipe, i);
3495                 } else {
3496                         memset(&rt, 0, sizeof(rt));
3497                         if (do_set != 0) {
3498                                 rt.set = i & 31;
3499                                 rt.flags = IPFW_RCFLAG_SET;
3500                         } else {
3501                                 rt.start_rule = i & 0xffff;
3502                                 rt.end_rule = j & 0xffff;
3503                                 if (rt.start_rule == 0 && rt.end_rule == 0)
3504                                         rt.flags |= IPFW_RCFLAG_ALL;
3505                                 else
3506                                         rt.flags |= IPFW_RCFLAG_RANGE;
3507                                 if (g_co.use_set != 0) {
3508                                         rt.set = g_co.use_set - 1;
3509                                         rt.flags |= IPFW_RCFLAG_SET;
3510                                 }
3511                         }
3512                         if (g_co.do_dynamic == 2)
3513                                 rt.flags |= IPFW_RCFLAG_DYNAMIC;
3514                         i = do_range_cmd(IP_FW_XDEL, &rt);
3515                         if (i != 0) {
3516                                 exitval = EX_UNAVAILABLE;
3517                                 if (g_co.do_quiet)
3518                                         continue;
3519                                 warn("rule %u: setsockopt(IP_FW_XDEL)",
3520                                     rt.start_rule);
3521                         } else if (rt.new_set == 0 && do_set == 0 &&
3522                             g_co.do_dynamic != 2) {
3523                                 exitval = EX_UNAVAILABLE;
3524                                 if (g_co.do_quiet)
3525                                         continue;
3526                                 if (rt.start_rule != rt.end_rule)
3527                                         warnx("no rules rules in %u-%u range",
3528                                             rt.start_rule, rt.end_rule);
3529                                 else
3530                                         warnx("rule %u not found",
3531                                             rt.start_rule);
3532                         }
3533                 }
3534         }
3535         if (exitval != EX_OK && g_co.do_force == 0)
3536                 exit(exitval);
3537 }
3538
3539
3540 /*
3541  * fill the interface structure. We do not check the name as we can
3542  * create interfaces dynamically, so checking them at insert time
3543  * makes relatively little sense.
3544  * Interface names containing '*', '?', or '[' are assumed to be shell
3545  * patterns which match interfaces.
3546  */
3547 static void
3548 fill_iface(ipfw_insn_if *cmd, char *arg, int cblen, struct tidx *tstate)
3549 {
3550         char *p;
3551         uint16_t uidx;
3552
3553         cmd->name[0] = '\0';
3554         cmd->o.len |= F_INSN_SIZE(ipfw_insn_if);
3555
3556         CHECK_CMDLEN;
3557
3558         /* Parse the interface or address */
3559         if (strcmp(arg, "any") == 0)
3560                 cmd->o.len = 0;         /* effectively ignore this command */
3561         else if (strncmp(arg, "table(", 6) == 0) {
3562                 if ((p = strchr(arg + 6, ')')) == NULL)
3563                         errx(EX_DATAERR, "forgotten parenthesis: '%s'", arg);
3564                 *p = '\0';
3565                 p = strchr(arg + 6, ',');
3566                 if (p)
3567                         *p++ = '\0';
3568                 if ((uidx = pack_table(tstate, arg + 6)) == 0)
3569                         errx(EX_DATAERR, "Invalid table name: %s", arg + 6);
3570
3571                 cmd->name[0] = '\1'; /* Special value indicating table */
3572                 cmd->p.kidx = uidx;
3573         } else if (!isdigit(*arg)) {
3574                 strlcpy(cmd->name, arg, sizeof(cmd->name));
3575                 cmd->p.glob = strpbrk(arg, "*?[") != NULL ? 1 : 0;
3576         } else if (!inet_aton(arg, &cmd->p.ip))
3577                 errx(EX_DATAERR, "bad ip address ``%s''", arg);
3578 }
3579
3580 static void
3581 get_mac_addr_mask(const char *p, uint8_t *addr, uint8_t *mask)
3582 {
3583         int i;
3584         size_t l;
3585         char *ap, *ptr, *optr;
3586         struct ether_addr *mac;
3587         const char *macset = "0123456789abcdefABCDEF:";
3588
3589         if (strcmp(p, "any") == 0) {
3590                 for (i = 0; i < ETHER_ADDR_LEN; i++)
3591                         addr[i] = mask[i] = 0;
3592                 return;
3593         }
3594
3595         optr = ptr = strdup(p);
3596         if ((ap = strsep(&ptr, "&/")) != NULL && *ap != 0) {
3597                 l = strlen(ap);
3598                 if (strspn(ap, macset) != l || (mac = ether_aton(ap)) == NULL)
3599                         errx(EX_DATAERR, "Incorrect MAC address");
3600                 bcopy(mac, addr, ETHER_ADDR_LEN);
3601         } else
3602                 errx(EX_DATAERR, "Incorrect MAC address");
3603
3604         if (ptr != NULL) { /* we have mask? */
3605                 if (p[ptr - optr - 1] == '/') { /* mask len */
3606                         long ml = strtol(ptr, &ap, 10);
3607                         if (*ap != 0 || ml > ETHER_ADDR_LEN * 8 || ml < 0)
3608                                 errx(EX_DATAERR, "Incorrect mask length");
3609                         for (i = 0; ml > 0 && i < ETHER_ADDR_LEN; ml -= 8, i++)
3610                                 mask[i] = (ml >= 8) ? 0xff: (~0) << (8 - ml);
3611                 } else { /* mask */
3612                         l = strlen(ptr);
3613                         if (strspn(ptr, macset) != l ||
3614                             (mac = ether_aton(ptr)) == NULL)
3615                                 errx(EX_DATAERR, "Incorrect mask");
3616                         bcopy(mac, mask, ETHER_ADDR_LEN);
3617                 }
3618         } else { /* default mask: ff:ff:ff:ff:ff:ff */
3619                 for (i = 0; i < ETHER_ADDR_LEN; i++)
3620                         mask[i] = 0xff;
3621         }
3622         for (i = 0; i < ETHER_ADDR_LEN; i++)
3623                 addr[i] &= mask[i];
3624
3625         free(optr);
3626 }
3627
3628 /*
3629  * helper function, updates the pointer to cmd with the length
3630  * of the current command, and also cleans up the first word of
3631  * the new command in case it has been clobbered before.
3632  */
3633 static ipfw_insn *
3634 next_cmd(ipfw_insn *cmd, int *len)
3635 {
3636         *len -= F_LEN(cmd);
3637         CHECK_LENGTH(*len, 0);
3638         cmd += F_LEN(cmd);
3639         bzero(cmd, sizeof(*cmd));
3640         return cmd;
3641 }
3642
3643 /*
3644  * Takes arguments and copies them into a comment
3645  */
3646 static void
3647 fill_comment(ipfw_insn *cmd, char **av, int cblen)
3648 {
3649         int i, l;
3650         char *p = (char *)(cmd + 1);
3651
3652         cmd->opcode = O_NOP;
3653         cmd->len =  (cmd->len & (F_NOT | F_OR));
3654
3655         /* Compute length of comment string. */
3656         for (i = 0, l = 0; av[i] != NULL; i++)
3657                 l += strlen(av[i]) + 1;
3658         if (l == 0)
3659                 return;
3660         if (l > 84)
3661                 errx(EX_DATAERR,
3662                     "comment too long (max 80 chars)");
3663         l = 1 + (l+3)/4;
3664         cmd->len =  (cmd->len & (F_NOT | F_OR)) | l;
3665         CHECK_CMDLEN;
3666
3667         for (i = 0; av[i] != NULL; i++) {
3668                 strcpy(p, av[i]);
3669                 p += strlen(av[i]);
3670                 *p++ = ' ';
3671         }
3672         *(--p) = '\0';
3673 }
3674
3675 /*
3676  * A function to fill simple commands of size 1.
3677  * Existing flags are preserved.
3678  */
3679 static void
3680 fill_cmd(ipfw_insn *cmd, enum ipfw_opcodes opcode, int flags, uint16_t arg)
3681 {
3682         cmd->opcode = opcode;
3683         cmd->len =  ((cmd->len | flags) & (F_NOT | F_OR)) | 1;
3684         cmd->arg1 = arg;
3685 }
3686
3687 /*
3688  * Fetch and add the MAC address and type, with masks. This generates one or
3689  * two microinstructions, and returns the pointer to the last one.
3690  */
3691 static ipfw_insn *
3692 add_mac(ipfw_insn *cmd, char *av[], int cblen)
3693 {
3694         ipfw_insn_mac *mac;
3695
3696         if ( ( av[0] == NULL ) || ( av[1] == NULL ) )
3697                 errx(EX_DATAERR, "MAC dst src");
3698
3699         cmd->opcode = O_MACADDR2;
3700         cmd->len = (cmd->len & (F_NOT | F_OR)) | F_INSN_SIZE(ipfw_insn_mac);
3701         CHECK_CMDLEN;
3702
3703         mac = (ipfw_insn_mac *)cmd;
3704         get_mac_addr_mask(av[0], mac->addr, mac->mask); /* dst */
3705         get_mac_addr_mask(av[1], &(mac->addr[ETHER_ADDR_LEN]),
3706             &(mac->mask[ETHER_ADDR_LEN])); /* src */
3707         return cmd;
3708 }
3709
3710 static ipfw_insn *
3711 add_mactype(ipfw_insn *cmd, char *av, int cblen)
3712 {
3713         if (!av)
3714                 errx(EX_DATAERR, "missing MAC type");
3715         if (strcmp(av, "any") != 0) { /* we have a non-null type */
3716                 fill_newports((ipfw_insn_u16 *)cmd, av, IPPROTO_ETHERTYPE,
3717                     cblen);
3718                 cmd->opcode = O_MAC_TYPE;
3719                 return cmd;
3720         } else
3721                 return NULL;
3722 }
3723
3724 static ipfw_insn *
3725 add_proto0(ipfw_insn *cmd, char *av, u_char *protop)
3726 {
3727         struct protoent *pe;
3728         char *ep;
3729         int proto;
3730
3731         proto = strtol(av, &ep, 10);
3732         if (*ep != '\0' || proto <= 0) {
3733                 if ((pe = getprotobyname(av)) == NULL)
3734                         return NULL;
3735                 proto = pe->p_proto;
3736         }
3737
3738         fill_cmd(cmd, O_PROTO, 0, proto);
3739         *protop = proto;
3740         return cmd;
3741 }
3742
3743 static ipfw_insn *
3744 add_proto(ipfw_insn *cmd, char *av, u_char *protop)
3745 {
3746         u_char proto = IPPROTO_IP;
3747
3748         if (_substrcmp(av, "all") == 0 || strcmp(av, "ip") == 0)
3749                 ; /* do not set O_IP4 nor O_IP6 */
3750         else if (strcmp(av, "ip4") == 0)
3751                 /* explicit "just IPv4" rule */
3752                 fill_cmd(cmd, O_IP4, 0, 0);
3753         else if (strcmp(av, "ip6") == 0) {
3754                 /* explicit "just IPv6" rule */
3755                 proto = IPPROTO_IPV6;
3756                 fill_cmd(cmd, O_IP6, 0, 0);
3757         } else
3758                 return add_proto0(cmd, av, protop);
3759
3760         *protop = proto;
3761         return cmd;
3762 }
3763
3764 static ipfw_insn *
3765 add_proto_compat(ipfw_insn *cmd, char *av, u_char *protop)
3766 {
3767         u_char proto = IPPROTO_IP;
3768
3769         if (_substrcmp(av, "all") == 0 || strcmp(av, "ip") == 0)
3770                 ; /* do not set O_IP4 nor O_IP6 */
3771         else if (strcmp(av, "ipv4") == 0 || strcmp(av, "ip4") == 0)
3772                 /* explicit "just IPv4" rule */
3773                 fill_cmd(cmd, O_IP4, 0, 0);
3774         else if (strcmp(av, "ipv6") == 0 || strcmp(av, "ip6") == 0) {
3775                 /* explicit "just IPv6" rule */
3776                 proto = IPPROTO_IPV6;
3777                 fill_cmd(cmd, O_IP6, 0, 0);
3778         } else
3779                 return add_proto0(cmd, av, protop);
3780
3781         *protop = proto;
3782         return cmd;
3783 }
3784
3785 static ipfw_insn *
3786 add_srcip(ipfw_insn *cmd, char *av, int cblen, struct tidx *tstate)
3787 {
3788         fill_ip((ipfw_insn_ip *)cmd, av, cblen, tstate);
3789         if (cmd->opcode == O_IP_DST_SET)                        /* set */
3790                 cmd->opcode = O_IP_SRC_SET;
3791         else if (cmd->opcode == O_IP_DST_LOOKUP)                /* table */
3792                 cmd->opcode = O_IP_SRC_LOOKUP;
3793         else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn))          /* me */
3794                 cmd->opcode = O_IP_SRC_ME;
3795         else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_u32))      /* one IP */
3796                 cmd->opcode = O_IP_SRC;
3797         else                                                    /* addr/mask */
3798                 cmd->opcode = O_IP_SRC_MASK;
3799         return cmd;
3800 }
3801
3802 static ipfw_insn *
3803 add_dstip(ipfw_insn *cmd, char *av, int cblen, struct tidx *tstate)
3804 {
3805         fill_ip((ipfw_insn_ip *)cmd, av, cblen, tstate);
3806         if (cmd->opcode == O_IP_DST_SET)                        /* set */
3807                 ;
3808         else if (cmd->opcode == O_IP_DST_LOOKUP)                /* table */
3809                 ;
3810         else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn))          /* me */
3811                 cmd->opcode = O_IP_DST_ME;
3812         else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_u32))      /* one IP */
3813                 cmd->opcode = O_IP_DST;
3814         else                                                    /* addr/mask */
3815                 cmd->opcode = O_IP_DST_MASK;
3816         return cmd;
3817 }
3818
3819 static ipfw_insn *
3820 add_srcmac(ipfw_insn *cmd, char *av, struct tidx *tstate)
3821 {
3822
3823         if (strncmp(av, "table(", 6) == 0)
3824                 fill_table(cmd, av, O_MAC_SRC_LOOKUP, tstate);
3825         else
3826                 errx(EX_DATAERR, "only mac table lookup is supported %s", av);
3827         return cmd;
3828 }
3829
3830 static ipfw_insn *
3831 add_dstmac(ipfw_insn *cmd, char *av, struct tidx *tstate)
3832 {
3833
3834         if (strncmp(av, "table(", 6) == 0)
3835                 fill_table(cmd, av, O_MAC_DST_LOOKUP, tstate);
3836         else
3837                 errx(EX_DATAERR, "only mac table lookup is supported %s", av);
3838         return cmd;
3839 }
3840
3841
3842 static struct _s_x f_reserved_keywords[] = {
3843         { "altq",       TOK_OR },
3844         { "//",         TOK_OR },
3845         { "diverted",   TOK_OR },
3846         { "dst-port",   TOK_OR },
3847         { "src-port",   TOK_OR },
3848         { "established",        TOK_OR },
3849         { "keep-state", TOK_OR },
3850         { "frag",       TOK_OR },
3851         { "icmptypes",  TOK_OR },
3852         { "in",         TOK_OR },
3853         { "out",        TOK_OR },
3854         { "ip6",        TOK_OR },
3855         { "any",        TOK_OR },
3856         { "to",         TOK_OR },
3857         { "via",        TOK_OR },
3858         { "{",          TOK_OR },
3859         { NULL, 0 }     /* terminator */
3860 };
3861
3862 static ipfw_insn *
3863 add_ports(ipfw_insn *cmd, char *av, u_char proto, int opcode, int cblen)
3864 {
3865
3866         if (match_token(f_reserved_keywords, av) != -1)
3867                 return (NULL);
3868
3869         if (fill_newports((ipfw_insn_u16 *)cmd, av, proto, cblen)) {
3870                 /* XXX todo: check that we have a protocol with ports */
3871                 cmd->opcode = opcode;
3872                 return cmd;
3873         }
3874         return NULL;
3875 }
3876
3877 static ipfw_insn *
3878 add_src(ipfw_insn *cmd, char *av, u_char proto, int cblen, struct tidx *tstate)
3879 {
3880         struct in6_addr a;
3881         char *host, *ch, buf[INET6_ADDRSTRLEN];
3882         ipfw_insn *ret = NULL;
3883         size_t len;
3884
3885         /* Copy first address in set if needed */
3886         if ((ch = strpbrk(av, "/,")) != NULL) {
3887                 len = ch - av;
3888                 strlcpy(buf, av, sizeof(buf));
3889                 if (len < sizeof(buf))
3890                         buf[len] = '\0';
3891                 host = buf;
3892         } else
3893                 host = av;
3894
3895         if (proto == IPPROTO_IPV6  || strcmp(av, "me6") == 0 ||
3896             inet_pton(AF_INET6, host, &a) == 1)
3897                 ret = add_srcip6(cmd, av, cblen, tstate);
3898         /* XXX: should check for IPv4, not !IPv6 */
3899         if (ret == NULL && (proto == IPPROTO_IP || strcmp(av, "me") == 0 ||
3900             inet_pton(AF_INET6, host, &a) != 1))
3901                 ret = add_srcip(cmd, av, cblen, tstate);
3902         if (ret == NULL && strcmp(av, "any") != 0)
3903                 ret = cmd;
3904
3905         return ret;
3906 }
3907
3908 static ipfw_insn *
3909 add_dst(ipfw_insn *cmd, char *av, u_char proto, int cblen, struct tidx *tstate)
3910 {
3911         struct in6_addr a;
3912         char *host, *ch, buf[INET6_ADDRSTRLEN];
3913         ipfw_insn *ret = NULL;
3914         size_t len;
3915
3916         /* Copy first address in set if needed */
3917         if ((ch = strpbrk(av, "/,")) != NULL) {
3918                 len = ch - av;
3919                 strlcpy(buf, av, sizeof(buf));
3920                 if (len < sizeof(buf))
3921                         buf[len] = '\0';
3922                 host = buf;
3923         } else
3924                 host = av;
3925
3926         if (proto == IPPROTO_IPV6  || strcmp(av, "me6") == 0 ||
3927             inet_pton(AF_INET6, host, &a) == 1)
3928                 ret = add_dstip6(cmd, av, cblen, tstate);
3929         /* XXX: should check for IPv4, not !IPv6 */
3930         if (ret == NULL && (proto == IPPROTO_IP || strcmp(av, "me") == 0 ||
3931             inet_pton(AF_INET6, host, &a) != 1))
3932                 ret = add_dstip(cmd, av, cblen, tstate);
3933         if (ret == NULL && strcmp(av, "any") != 0)
3934                 ret = cmd;
3935
3936         return ret;
3937 }
3938
3939 static inline int
3940 arg_or_targ_relaxed(const char *arg, const char *action)
3941 {
3942         uint32_t arg1 = (uint32_t)(-1);
3943
3944         if (arg == NULL)
3945                 errx(EX_USAGE, "missing argument for %s", action);
3946         if (isdigit(arg[0])) {
3947                 arg1 = strtoul(arg, NULL, 10);
3948                 if (arg1 <= 0 || arg1 >= IP_FW_TABLEARG)
3949                         errx(EX_DATAERR, "illegal argument %s(%u) for %s",
3950                             arg, arg1, action);
3951         } else if (_substrcmp(arg, "tablearg") == 0)
3952                 arg1 = IP_FW_TARG;
3953         return (arg1);
3954 }
3955
3956 static inline uint16_t
3957 arg_or_targ(const char *arg, const char *action)
3958 {
3959         uint32_t arg1 = arg_or_targ_relaxed(arg, action);
3960
3961         if (arg1 == (uint32_t)(-1))
3962                 errx(EX_DATAERR, "illegal argument %s(%u) for %s",
3963                     arg, arg1, action);
3964         return (arg1);
3965 }
3966
3967 static uint16_t
3968 get_divert_port(const char *arg, const char *action)
3969 {
3970         uint32_t arg1 = arg_or_targ_relaxed(arg, action);
3971
3972         if (arg1 != (uint32_t)(-1))
3973                 return (arg1);
3974
3975         struct servent *s;
3976         setservent(1);
3977         s = getservbyname(arg, "divert");
3978         if (s == NULL)
3979                 errx(EX_DATAERR, "illegal divert/tee port");
3980         return (ntohs(s->s_port));
3981 }
3982
3983 /*
3984  * Parse arguments and assemble the microinstructions which make up a rule.
3985  * Rules are added into the 'rulebuf' and then copied in the correct order
3986  * into the actual rule.
3987  *
3988  * The syntax for a rule starts with the action, followed by
3989  * optional action parameters, and the various match patterns.
3990  * In the assembled microcode, the first opcode must be an O_PROBE_STATE
3991  * (generated if the rule includes a keep-state option), then the
3992  * various match patterns, log/altq actions, and the actual action.
3993  *
3994  */
3995 static void
3996 compile_rule(char *av[], uint32_t *rbuf, int *rbufsize, struct tidx *tstate)
3997 {
3998         /*
3999          * rules are added into the 'rulebuf' and then copied in
4000          * the correct order into the actual rule.
4001          * Some things that need to go out of order (prob, action etc.)
4002          * go into actbuf[].
4003          */
4004         static uint32_t actbuf[255], cmdbuf[255];
4005         int rblen, ablen, cblen;
4006
4007         ipfw_insn *src, *dst, *cmd, *action, *prev=NULL;
4008         ipfw_insn *first_cmd;   /* first match pattern */
4009
4010         struct ip_fw_rule *rule;
4011
4012         /*
4013          * various flags used to record that we entered some fields.
4014          */
4015         ipfw_insn *have_state = NULL;   /* any state-related option */
4016         int have_rstate = 0;
4017         ipfw_insn *have_log = NULL, *have_altq = NULL, *have_tag = NULL;
4018         ipfw_insn *have_skipcmd = NULL;
4019         size_t len;
4020
4021         int i;
4022
4023         int open_par = 0;       /* open parenthesis ( */
4024
4025         /* proto is here because it is used to fetch ports */
4026         u_char proto = IPPROTO_IP;      /* default protocol */
4027
4028         double match_prob = 1; /* match probability, default is always match */
4029
4030         bzero(actbuf, sizeof(actbuf));          /* actions go here */
4031         bzero(cmdbuf, sizeof(cmdbuf));
4032         bzero(rbuf, *rbufsize);
4033
4034         rule = (struct ip_fw_rule *)rbuf;
4035         cmd = (ipfw_insn *)cmdbuf;
4036         action = (ipfw_insn *)actbuf;
4037
4038         rblen = *rbufsize / sizeof(uint32_t);
4039         rblen -= sizeof(struct ip_fw_rule) / sizeof(uint32_t);
4040         ablen = sizeof(actbuf) / sizeof(actbuf[0]);
4041         cblen = sizeof(cmdbuf) / sizeof(cmdbuf[0]);
4042         cblen -= F_INSN_SIZE(ipfw_insn_u32) + 1;
4043
4044 #define CHECK_RBUFLEN(len)      { CHECK_LENGTH(rblen, len); rblen -= len; }
4045 #define CHECK_ACTLEN            CHECK_LENGTH(ablen, action->len)
4046
4047         av++;
4048
4049         /* [rule N]     -- Rule number optional */
4050         if (av[0] && isdigit(**av)) {
4051                 rule->rulenum = atoi(*av);
4052                 av++;
4053         }
4054
4055         /* [set N]      -- set number (0..RESVD_SET), optional */
4056         if (av[0] && av[1] && _substrcmp(*av, "set") == 0) {
4057                 int set = strtoul(av[1], NULL, 10);
4058                 if (set < 0 || set > RESVD_SET)
4059                         errx(EX_DATAERR, "illegal set %s", av[1]);
4060                 rule->set = set;
4061                 tstate->set = set;
4062                 av += 2;
4063         }
4064
4065         /* [prob D]     -- match probability, optional */
4066         if (av[0] && av[1] && _substrcmp(*av, "prob") == 0) {
4067                 match_prob = strtod(av[1], NULL);
4068
4069                 if (match_prob <= 0 || match_prob > 1)
4070                         errx(EX_DATAERR, "illegal match prob. %s", av[1]);
4071                 av += 2;
4072         }
4073
4074         /* action       -- mandatory */
4075         NEED1("missing action");
4076         i = match_token(rule_actions, *av);
4077         av++;
4078         action->len = 1;        /* default */
4079         CHECK_ACTLEN;
4080         switch(i) {
4081         case TOK_CHECKSTATE:
4082                 have_state = action;
4083                 action->opcode = O_CHECK_STATE;
4084                 if (*av == NULL ||
4085                     match_token(rule_options, *av) == TOK_COMMENT) {
4086                         action->arg1 = pack_object(tstate,
4087                             default_state_name, IPFW_TLV_STATE_NAME);
4088                         break;
4089                 }
4090                 if (*av[0] == ':') {
4091                         if (strcmp(*av + 1, "any") == 0)
4092                                 action->arg1 = 0;
4093                         else if (state_check_name(*av + 1) == 0)
4094                                 action->arg1 = pack_object(tstate, *av + 1,
4095                                     IPFW_TLV_STATE_NAME);
4096                         else
4097                                 errx(EX_DATAERR, "Invalid state name %s",
4098                                     *av);
4099                         av++;
4100                         break;
4101                 }
4102                 errx(EX_DATAERR, "Invalid state name %s", *av);
4103                 break;
4104
4105         case TOK_ABORT:
4106                 action->opcode = O_REJECT;
4107                 action->arg1 = ICMP_REJECT_ABORT;
4108                 break;
4109
4110         case TOK_ABORT6:
4111                 action->opcode = O_UNREACH6;
4112                 action->arg1 = ICMP6_UNREACH_ABORT;
4113                 break;
4114
4115         case TOK_ACCEPT:
4116                 action->opcode = O_ACCEPT;
4117                 break;
4118
4119         case TOK_DENY:
4120                 action->opcode = O_DENY;
4121                 action->arg1 = 0;
4122                 break;
4123
4124         case TOK_REJECT:
4125                 action->opcode = O_REJECT;
4126                 action->arg1 = ICMP_UNREACH_HOST;
4127                 break;
4128
4129         case TOK_RESET:
4130                 action->opcode = O_REJECT;
4131                 action->arg1 = ICMP_REJECT_RST;
4132                 break;
4133
4134         case TOK_RESET6:
4135                 action->opcode = O_UNREACH6;
4136                 action->arg1 = ICMP6_UNREACH_RST;
4137                 break;
4138
4139         case TOK_UNREACH:
4140                 action->opcode = O_REJECT;
4141                 NEED1("missing reject code");
4142                 action->arg1 = get_reject_code(*av);
4143                 av++;
4144                 if (action->arg1 == ICMP_UNREACH_NEEDFRAG && isdigit(**av)) {
4145                         uint16_t mtu;
4146
4147                         mtu = strtoul(*av, NULL, 10);
4148                         if (mtu < 68 || mtu >= IP_MAXPACKET)
4149                                 errx(EX_DATAERR, "illegal argument for %s",
4150                                     *(av - 1));
4151                         action->len = F_INSN_SIZE(ipfw_insn_u16);
4152                         ((ipfw_insn_u16 *)action)->ports[0] = mtu;
4153                         av++;
4154                 }
4155                 break;
4156
4157         case TOK_UNREACH6:
4158                 action->opcode = O_UNREACH6;
4159                 NEED1("missing unreach code");
4160                 action->arg1 = get_unreach6_code(*av);
4161                 av++;
4162                 break;
4163
4164         case TOK_COUNT:
4165                 action->opcode = O_COUNT;
4166                 break;
4167
4168         case TOK_NAT:
4169                 action->opcode = O_NAT;
4170                 action->len = F_INSN_SIZE(ipfw_insn_nat);
4171                 CHECK_ACTLEN;
4172                 if (*av != NULL && _substrcmp(*av, "global") == 0)
4173                         action->arg1 = IP_FW_NAT44_GLOBAL;
4174                 else
4175                         action->arg1 = arg_or_targ(av[0], *(av - 1));
4176                 av++;
4177                 break;
4178         case TOK_QUEUE:
4179                 action->opcode = O_QUEUE;
4180                 action->arg1 = arg_or_targ(av[0], *(av - 1));
4181                 av++;
4182                 break;
4183         case TOK_PIPE:
4184                 action->opcode = O_PIPE;
4185                 action->arg1 = arg_or_targ(av[0], *(av - 1));
4186                 av++;
4187                 break;
4188         case TOK_SKIPTO:
4189                 action->opcode = O_SKIPTO;
4190                 action->arg1 = arg_or_targ(av[0], *(av - 1));
4191                 av++;
4192                 break;
4193         case TOK_NETGRAPH:
4194                 action->opcode = O_NETGRAPH;
4195                 action->arg1 = arg_or_targ(av[0], *(av - 1));
4196                 av++;
4197                 break;
4198         case TOK_NGTEE:
4199                 action->opcode = O_NGTEE;
4200                 action->arg1 = arg_or_targ(av[0], *(av - 1));
4201                 av++;
4202                 break;
4203         case TOK_DIVERT:
4204                 action->opcode = O_DIVERT;
4205                 action->arg1 = get_divert_port(av[0], *(av - 1));
4206                 av++;
4207                 break;
4208         case TOK_TEE:
4209                 action->opcode = O_TEE;
4210                 action->arg1 = get_divert_port(av[0], *(av - 1));
4211                 av++;
4212                 break;
4213         case TOK_CALL:
4214                 action->opcode = O_CALLRETURN;
4215                 action->arg1 = arg_or_targ(av[0], *(av - 1));
4216                 av++;
4217                 break;
4218
4219         case TOK_FORWARD: {
4220                 /*
4221                  * Locate the address-port separator (':' or ',').
4222                  * Could be one of the following:
4223                  *      hostname:port
4224                  *      IPv4 a.b.c.d,port
4225                  *      IPv4 a.b.c.d:port
4226                  *      IPv6 w:x:y::z,port
4227                  *      IPv6 [w:x:y::z]:port
4228                  */
4229                 struct sockaddr_storage result;
4230                 struct addrinfo *res;
4231                 char *s, *end;
4232                 int family;
4233                 u_short port_number = 0;
4234
4235                 NEED1("missing forward address[:port]");
4236
4237                 if (strncmp(*av, "tablearg", 8) == 0 &&
4238                     ((*av)[8] == '\0' || (*av)[8] == ',' || (*av)[8] == ':'))
4239                         memcpy(++(*av), "0.0.0.0", 7);
4240
4241                 /*
4242                  * Are we an bracket-enclosed IPv6 address?
4243                  */
4244                 if (strchr(*av, '['))
4245                         (*av)++;
4246
4247                 /*
4248                  * locate the address-port separator (':' or ',')
4249                  */
4250                 s = strchr(*av, ',');
4251                 if (s == NULL) {
4252                         s = strchr(*av, ']');
4253                         /* Prevent erroneous parsing on brackets. */
4254                         if (s != NULL)
4255                                 *(s++) = '\0';
4256                         else
4257                                 s = *av;
4258
4259                         /* Distinguish between IPv4:port and IPv6 cases. */
4260                         s = strchr(s, ':');
4261                         if (s && strchr(s+1, ':'))
4262                                 s = NULL; /* no port */
4263                 }
4264
4265                 if (s != NULL) {
4266                         /* Terminate host portion and set s to start of port. */
4267                         *(s++) = '\0';
4268                         i = strtoport(s, &end, 0 /* base */, 0 /* proto */);
4269                         if (s == end)
4270                                 errx(EX_DATAERR,
4271                                     "illegal forwarding port ``%s''", s);
4272                         port_number = (u_short)i;
4273                 }
4274
4275                 /*
4276                  * Resolve the host name or address to a family and a
4277                  * network representation of the address.
4278                  */
4279                 if (getaddrinfo(*av, NULL, NULL, &res))
4280                         errx(EX_DATAERR, NULL);
4281                 /* Just use the first host in the answer. */
4282                 family = res->ai_family;
4283                 memcpy(&result, res->ai_addr, res->ai_addrlen);
4284                 freeaddrinfo(res);
4285
4286                 if (family == PF_INET) {
4287                         ipfw_insn_sa *p = (ipfw_insn_sa *)action;
4288
4289                         action->opcode = O_FORWARD_IP;
4290                         action->len = F_INSN_SIZE(ipfw_insn_sa);
4291                         CHECK_ACTLEN;
4292
4293                         /*
4294                          * In the kernel we assume AF_INET and use only
4295                          * sin_port and sin_addr. Remember to set sin_len as
4296                          * the routing code seems to use it too.
4297                          */
4298                         p->sa.sin_len = sizeof(struct sockaddr_in);
4299                         p->sa.sin_family = AF_INET;
4300                         p->sa.sin_port = port_number;
4301                         p->sa.sin_addr.s_addr =
4302                              ((struct sockaddr_in *)&result)->sin_addr.s_addr;
4303                 } else if (family == PF_INET6) {
4304                         ipfw_insn_sa6 *p = (ipfw_insn_sa6 *)action;
4305
4306                         action->opcode = O_FORWARD_IP6;
4307                         action->len = F_INSN_SIZE(ipfw_insn_sa6);
4308                         CHECK_ACTLEN;
4309
4310                         p->sa.sin6_len = sizeof(struct sockaddr_in6);
4311                         p->sa.sin6_family = AF_INET6;
4312                         p->sa.sin6_port = port_number;
4313                         p->sa.sin6_flowinfo = 0;
4314                         p->sa.sin6_scope_id =
4315                             ((struct sockaddr_in6 *)&result)->sin6_scope_id;
4316                         bcopy(&((struct sockaddr_in6*)&result)->sin6_addr,
4317                             &p->sa.sin6_addr, sizeof(p->sa.sin6_addr));
4318                 } else {
4319                         errx(EX_DATAERR, "Invalid address family in forward action");
4320                 }
4321                 av++;
4322                 break;
4323             }
4324         case TOK_COMMENT:
4325                 /* pretend it is a 'count' rule followed by the comment */
4326                 action->opcode = O_COUNT;
4327                 av--;           /* go back... */
4328                 break;
4329
4330         case TOK_SETFIB:
4331             {
4332                 int numfibs;
4333                 size_t intsize = sizeof(int);
4334
4335                 action->opcode = O_SETFIB;
4336                 NEED1("missing fib number");
4337                 if (_substrcmp(*av, "tablearg") == 0) {
4338                         action->arg1 = IP_FW_TARG;
4339                 } else {
4340                         action->arg1 = strtoul(*av, NULL, 10);
4341                         if (sysctlbyname("net.fibs", &numfibs, &intsize,
4342                             NULL, 0) == -1)
4343                                 errx(EX_DATAERR, "fibs not supported.\n");
4344                         if (action->arg1 >= numfibs)  /* Temporary */
4345                                 errx(EX_DATAERR, "fib too large.\n");
4346                         /* Add high-order bit to fib to make room for tablearg*/
4347                         action->arg1 |= 0x8000;
4348                 }
4349                 av++;
4350                 break;
4351             }
4352
4353         case TOK_SETDSCP:
4354             {
4355                 int code;
4356
4357                 action->opcode = O_SETDSCP;
4358                 NEED1("missing DSCP code");
4359                 if (_substrcmp(*av, "tablearg") == 0) {
4360                         action->arg1 = IP_FW_TARG;
4361                 } else {
4362                         if (isalpha(*av[0])) {
4363                                 if ((code = match_token(f_ipdscp, *av)) == -1)
4364                                         errx(EX_DATAERR, "Unknown DSCP code");
4365                                 action->arg1 = code;
4366                         } else
4367                                 action->arg1 = strtoul(*av, NULL, 10);
4368                         /*
4369                          * Add high-order bit to DSCP to make room
4370                          * for tablearg
4371                          */
4372                         action->arg1 |= 0x8000;
4373                 }
4374                 av++;
4375                 break;
4376             }
4377
4378         case TOK_REASS:
4379                 action->opcode = O_REASS;
4380                 break;
4381
4382         case TOK_RETURN:
4383                 fill_cmd(action, O_CALLRETURN, F_NOT, 0);
4384                 break;
4385
4386         case TOK_SETMARK: {
4387                 action->opcode = O_SETMARK;
4388                 action->len = F_INSN_SIZE(ipfw_insn_u32);
4389                 NEED1("missing mark");
4390                 if (strcmp(*av, "tablearg") == 0) {
4391                         action->arg1 = IP_FW_TARG;
4392                 } else {
4393                         ((ipfw_insn_u32 *)action)->d[0] =
4394                             strtoul(*av, NULL, 0);
4395                         /* This is not a tablearg */
4396                         action->arg1 |= 0x8000;
4397                 }
4398                 av++;
4399                 CHECK_CMDLEN;
4400                 break;
4401         }
4402
4403         case TOK_TCPSETMSS: {
4404                 u_long mss;
4405                 uint16_t idx;
4406
4407                 idx = pack_object(tstate, "tcp-setmss", IPFW_TLV_EACTION);
4408                 if (idx == 0)
4409                         errx(EX_DATAERR, "pack_object failed");
4410                 fill_cmd(action, O_EXTERNAL_ACTION, 0, idx);
4411                 NEED1("Missing MSS value");
4412                 action = next_cmd(action, &ablen);
4413                 action->len = 1;
4414                 CHECK_ACTLEN;
4415                 mss = strtoul(*av, NULL, 10);
4416                 if (mss == 0 || mss > UINT16_MAX)
4417                         errx(EX_USAGE, "invalid MSS value %s", *av);
4418                 fill_cmd(action, O_EXTERNAL_DATA, 0, (uint16_t)mss);
4419                 av++;
4420                 break;
4421         }
4422
4423         default:
4424                 av--;
4425                 if (match_token(rule_eactions, *av) == -1)
4426                         errx(EX_DATAERR, "invalid action %s\n", *av);
4427                 /*
4428                  * External actions support.
4429                  * XXX: we support only syntax with instance name.
4430                  *      For known external actions (from rule_eactions list)
4431                  *      we can handle syntax directly. But with `eaction'
4432                  *      keyword we can use only `eaction <name> <instance>'
4433                  *      syntax.
4434                  */
4435         case TOK_EACTION: {
4436                 uint16_t idx;
4437
4438                 NEED1("Missing eaction name");
4439                 if (eaction_check_name(*av) != 0)
4440                         errx(EX_DATAERR, "Invalid eaction name %s", *av);
4441                 idx = pack_object(tstate, *av, IPFW_TLV_EACTION);
4442                 if (idx == 0)
4443                         errx(EX_DATAERR, "pack_object failed");
4444                 fill_cmd(action, O_EXTERNAL_ACTION, 0, idx);
4445                 av++;
4446                 NEED1("Missing eaction instance name");
4447                 action = next_cmd(action, &ablen);
4448                 action->len = 1;
4449                 CHECK_ACTLEN;
4450                 if (eaction_check_name(*av) != 0)
4451                         errx(EX_DATAERR, "Invalid eaction instance name %s",
4452                             *av);
4453                 /*
4454                  * External action instance object has TLV type depended
4455                  * from the external action name object index. Since we
4456                  * currently don't know this index, use zero as TLV type.
4457                  */
4458                 idx = pack_object(tstate, *av, 0);
4459                 if (idx == 0)
4460                         errx(EX_DATAERR, "pack_object failed");
4461                 fill_cmd(action, O_EXTERNAL_INSTANCE, 0, idx);
4462                 av++;
4463                 }
4464         }
4465         action = next_cmd(action, &ablen);
4466
4467         /*
4468          * [altq queuename] -- altq tag, optional
4469          * [log [logamount N]]  -- log, optional
4470          *
4471          * If they exist, it go first in the cmdbuf, but then it is
4472          * skipped in the copy section to the end of the buffer.
4473          */
4474         while (av[0] != NULL && (i = match_token(rule_action_params, *av)) != -1) {
4475                 av++;
4476                 switch (i) {
4477                 case TOK_LOG:
4478                     {
4479                         ipfw_insn_log *c = (ipfw_insn_log *)cmd;
4480                         int l;
4481
4482                         if (have_log)
4483                                 errx(EX_DATAERR,
4484                                     "log cannot be specified more than once");
4485                         have_log = (ipfw_insn *)c;
4486                         cmd->len = F_INSN_SIZE(ipfw_insn_log);
4487                         CHECK_CMDLEN;
4488                         cmd->opcode = O_LOG;
4489                         if (av[0] && _substrcmp(*av, "logamount") == 0) {
4490                                 av++;
4491                                 NEED1("logamount requires argument");
4492                                 l = atoi(*av);
4493                                 if (l < 0)
4494                                         errx(EX_DATAERR,
4495                                             "logamount must be positive");
4496                                 c->max_log = l;
4497                                 av++;
4498                         } else {
4499                                 len = sizeof(c->max_log);
4500                                 if (sysctlbyname("net.inet.ip.fw.verbose_limit",
4501                                     &c->max_log, &len, NULL, 0) == -1) {
4502                                         if (g_co.test_only) {
4503                                                 c->max_log = 0;
4504                                                 break;
4505                                         }
4506                                         errx(1, "sysctlbyname(\"%s\")",
4507                                             "net.inet.ip.fw.verbose_limit");
4508                                 }
4509                         }
4510                     }
4511                         break;
4512
4513 #ifndef NO_ALTQ
4514                 case TOK_ALTQ:
4515                     {
4516                         ipfw_insn_altq *a = (ipfw_insn_altq *)cmd;
4517
4518                         NEED1("missing altq queue name");
4519                         if (have_altq)
4520                                 errx(EX_DATAERR,
4521                                     "altq cannot be specified more than once");
4522                         have_altq = (ipfw_insn *)a;
4523                         cmd->len = F_INSN_SIZE(ipfw_insn_altq);
4524                         CHECK_CMDLEN;
4525                         cmd->opcode = O_ALTQ;
4526                         a->qid = altq_name_to_qid(*av);
4527                         av++;
4528                     }
4529                         break;
4530 #endif
4531
4532                 case TOK_TAG:
4533                 case TOK_UNTAG: {
4534                         uint16_t tag;
4535
4536                         if (have_tag)
4537                                 errx(EX_USAGE, "tag and untag cannot be "
4538                                     "specified more than once");
4539                         GET_UINT_ARG(tag, IPFW_ARG_MIN, IPFW_ARG_MAX, i,
4540                            rule_action_params);
4541                         have_tag = cmd;
4542                         fill_cmd(cmd, O_TAG, (i == TOK_TAG) ? 0: F_NOT, tag);
4543                         av++;
4544                         break;
4545                 }
4546
4547                 default:
4548                         abort();
4549                 }
4550                 cmd = next_cmd(cmd, &cblen);
4551         }
4552
4553         if (have_state) { /* must be a check-state, we are done */
4554                 if (*av != NULL &&
4555                     match_token(rule_options, *av) == TOK_COMMENT) {
4556                         /* check-state has a comment */
4557                         av++;
4558                         fill_comment(cmd, av, cblen);
4559                         cmd = next_cmd(cmd, &cblen);
4560                         av[0] = NULL;
4561                 }
4562                 goto done;
4563         }
4564
4565 #define OR_START(target)                                        \
4566         if (av[0] && (*av[0] == '(' || *av[0] == '{')) {        \
4567                 if (open_par)                                   \
4568                         errx(EX_USAGE, "nested \"(\" not allowed\n"); \
4569                 prev = NULL;                                    \
4570                 open_par = 1;                                   \
4571                 if ( (av[0])[1] == '\0') {                      \
4572                         av++;                                   \
4573                 } else                                          \
4574                         (*av)++;                                \
4575         }                                                       \
4576         target:                                                 \
4577
4578
4579 #define CLOSE_PAR                                               \
4580         if (open_par) {                                         \
4581                 if (av[0] && (                                  \
4582                     strcmp(*av, ")") == 0 ||                    \
4583                     strcmp(*av, "}") == 0)) {                   \
4584                         prev = NULL;                            \
4585                         open_par = 0;                           \
4586                         av++;                                   \
4587                 } else                                          \
4588                         errx(EX_USAGE, "missing \")\"\n");      \
4589         }
4590
4591 #define NOT_BLOCK                                               \
4592         if (av[0] && _substrcmp(*av, "not") == 0) {             \
4593                 if (cmd->len & F_NOT)                           \
4594                         errx(EX_USAGE, "double \"not\" not allowed\n"); \
4595                 cmd->len |= F_NOT;                              \
4596                 av++;                                           \
4597         }
4598
4599 #define OR_BLOCK(target)                                        \
4600         if (av[0] && _substrcmp(*av, "or") == 0) {              \
4601                 if (prev == NULL || open_par == 0)              \
4602                         errx(EX_DATAERR, "invalid OR block");   \
4603                 prev->len |= F_OR;                              \
4604                 av++;                                   \
4605                 goto target;                                    \
4606         }                                                       \
4607         CLOSE_PAR;
4608
4609         first_cmd = cmd;
4610
4611 #if 0
4612         /*
4613          * MAC addresses, optional.
4614          * If we have this, we skip the part "proto from src to dst"
4615          * and jump straight to the option parsing.
4616          */
4617         NOT_BLOCK;
4618         NEED1("missing protocol");
4619         if (_substrcmp(*av, "MAC") == 0 ||
4620             _substrcmp(*av, "mac") == 0) {
4621                 av++;                   /* the "MAC" keyword */
4622                 add_mac(cmd, av);       /* exits in case of errors */
4623                 cmd = next_cmd(cmd);
4624                 av += 2;                /* dst-mac and src-mac */
4625                 NOT_BLOCK;
4626                 NEED1("missing mac type");
4627                 if (add_mactype(cmd, av[0]))
4628                         cmd = next_cmd(cmd);
4629                 av++;                   /* any or mac-type */
4630                 goto read_options;
4631         }
4632 #endif
4633
4634         /*
4635          * protocol, mandatory
4636          */
4637     OR_START(get_proto);
4638         NOT_BLOCK;
4639         NEED1("missing protocol");
4640         if (add_proto_compat(cmd, *av, &proto)) {
4641                 av++;
4642                 if (F_LEN(cmd) != 0) {
4643                         prev = cmd;
4644                         cmd = next_cmd(cmd, &cblen);
4645                 }
4646         } else if (first_cmd != cmd) {
4647                 errx(EX_DATAERR, "invalid protocol ``%s''", *av);
4648         } else {
4649                 rule->flags |= IPFW_RULE_JUSTOPTS;
4650                 goto read_options;
4651         }
4652     OR_BLOCK(get_proto);
4653
4654         first_cmd = cmd; /* update pointer to use in compact form */
4655
4656         /*
4657          * "from", mandatory
4658          */
4659         if ((av[0] == NULL) || _substrcmp(*av, "from") != 0)
4660                 errx(EX_USAGE, "missing ``from''");
4661         av++;
4662
4663         /*
4664          * source IP, mandatory
4665          */
4666     OR_START(source_ip);
4667         NOT_BLOCK;      /* optional "not" */
4668         NEED1("missing source address");
4669         if (add_src(cmd, *av, proto, cblen, tstate)) {
4670                 av++;
4671                 if (F_LEN(cmd) != 0) {  /* ! any */
4672                         prev = cmd;
4673                         cmd = next_cmd(cmd, &cblen);
4674                 }
4675         } else
4676                 errx(EX_USAGE, "bad source address %s", *av);
4677     OR_BLOCK(source_ip);
4678
4679         /*
4680          * source ports, optional
4681          */
4682         NOT_BLOCK;      /* optional "not" */
4683         if ( av[0] != NULL ) {
4684                 if (_substrcmp(*av, "any") == 0 ||
4685                     add_ports(cmd, *av, proto, O_IP_SRCPORT, cblen)) {
4686                         av++;
4687                         if (F_LEN(cmd) != 0)
4688                                 cmd = next_cmd(cmd, &cblen);
4689                 }
4690         }
4691
4692         /*
4693          * "to", mandatory
4694          */
4695         if ( (av[0] == NULL) || _substrcmp(*av, "to") != 0 )
4696                 errx(EX_USAGE, "missing ``to''");
4697         av++;
4698
4699         /*
4700          * destination, mandatory
4701          */
4702     OR_START(dest_ip);
4703         NOT_BLOCK;      /* optional "not" */
4704         NEED1("missing dst address");
4705         if (add_dst(cmd, *av, proto, cblen, tstate)) {
4706                 av++;
4707                 if (F_LEN(cmd) != 0) {  /* ! any */
4708                         prev = cmd;
4709                         cmd = next_cmd(cmd, &cblen);
4710                 }
4711         } else
4712                 errx( EX_USAGE, "bad destination address %s", *av);
4713     OR_BLOCK(dest_ip);
4714
4715         /*
4716          * dest. ports, optional
4717          */
4718         NOT_BLOCK;      /* optional "not" */
4719         if (av[0]) {
4720                 if (_substrcmp(*av, "any") == 0 ||
4721                     add_ports(cmd, *av, proto, O_IP_DSTPORT, cblen)) {
4722                         av++;
4723                         if (F_LEN(cmd) != 0)
4724                                 cmd = next_cmd(cmd, &cblen);
4725                 }
4726         }
4727         if (first_cmd == cmd)
4728                 rule->flags |= IPFW_RULE_NOOPT;
4729
4730 read_options:
4731         prev = NULL;
4732         while ( av[0] != NULL ) {
4733                 char *s;
4734                 ipfw_insn_u32 *cmd32;   /* alias for cmd */
4735
4736                 s = *av;
4737                 cmd32 = (ipfw_insn_u32 *)cmd;
4738
4739                 if (*s == '!') {        /* alternate syntax for NOT */
4740                         if (cmd->len & F_NOT)
4741                                 errx(EX_USAGE, "double \"not\" not allowed\n");
4742                         cmd->len = F_NOT;
4743                         s++;
4744                 }
4745                 i = match_token(rule_options, s);
4746                 av++;
4747                 switch(i) {
4748                 case TOK_NOT:
4749                         if (cmd->len & F_NOT)
4750                                 errx(EX_USAGE, "double \"not\" not allowed\n");
4751                         cmd->len = F_NOT;
4752                         break;
4753
4754                 case TOK_OR:
4755                         if (open_par == 0 || prev == NULL)
4756                                 errx(EX_USAGE, "invalid \"or\" block\n");
4757                         prev->len |= F_OR;
4758                         break;
4759
4760                 case TOK_STARTBRACE:
4761                         if (open_par)
4762                                 errx(EX_USAGE, "+nested \"(\" not allowed\n");
4763                         open_par = 1;
4764                         break;
4765
4766                 case TOK_ENDBRACE:
4767                         if (!open_par)
4768                                 errx(EX_USAGE, "+missing \")\"\n");
4769                         open_par = 0;
4770                         prev = NULL;
4771                         break;
4772
4773                 case TOK_IN:
4774                         fill_cmd(cmd, O_IN, 0, 0);
4775                         break;
4776
4777                 case TOK_OUT:
4778                         cmd->len ^= F_NOT; /* toggle F_NOT */
4779                         fill_cmd(cmd, O_IN, 0, 0);
4780                         break;
4781
4782                 case TOK_DIVERTED:
4783                         fill_cmd(cmd, O_DIVERTED, 0, 3);
4784                         break;
4785
4786                 case TOK_DIVERTEDLOOPBACK:
4787                         fill_cmd(cmd, O_DIVERTED, 0, 1);
4788                         break;
4789
4790                 case TOK_DIVERTEDOUTPUT:
4791                         fill_cmd(cmd, O_DIVERTED, 0, 2);
4792                         break;
4793
4794                 case TOK_FRAG: {
4795                         uint32_t set = 0, clear = 0;
4796
4797                         if (*av != NULL && fill_flags(f_ipoff, *av, NULL,
4798                             &set, &clear) == 0)
4799                                 av++;
4800                         else {
4801                                 /*
4802                                  * Compatibility: no argument after "frag"
4803                                  * keyword equals to "frag offset".
4804                                  */
4805                                 set = 0x01;
4806                                 clear = 0;
4807                         }
4808                         fill_cmd(cmd, O_FRAG, 0,
4809                             (set & 0xff) | ( (clear & 0xff) << 8));
4810                         break;
4811                 }
4812
4813                 case TOK_LAYER2:
4814                         fill_cmd(cmd, O_LAYER2, 0, 0);
4815                         break;
4816
4817                 case TOK_XMIT:
4818                 case TOK_RECV:
4819                 case TOK_VIA:
4820                         NEED1("recv, xmit, via require interface name"
4821                                 " or address");
4822                         fill_iface((ipfw_insn_if *)cmd, av[0], cblen, tstate);
4823                         av++;
4824                         if (F_LEN(cmd) == 0)    /* not a valid address */
4825                                 break;
4826                         if (i == TOK_XMIT)
4827                                 cmd->opcode = O_XMIT;
4828                         else if (i == TOK_RECV)
4829                                 cmd->opcode = O_RECV;
4830                         else if (i == TOK_VIA)
4831                                 cmd->opcode = O_VIA;
4832                         break;
4833
4834                 case TOK_ICMPTYPES:
4835                         NEED1("icmptypes requires list of types");
4836                         fill_icmptypes((ipfw_insn_u32 *)cmd, *av);
4837                         av++;
4838                         break;
4839
4840                 case TOK_ICMP6TYPES:
4841                         NEED1("icmptypes requires list of types");
4842                         fill_icmp6types((ipfw_insn_icmp6 *)cmd, *av, cblen);
4843                         av++;
4844                         break;
4845
4846                 case TOK_IPTTL:
4847                         NEED1("ipttl requires TTL");
4848                         if (strpbrk(*av, "-,")) {
4849                             if (!add_ports(cmd, *av, 0, O_IPTTL, cblen))
4850                                 errx(EX_DATAERR, "invalid ipttl %s", *av);
4851                         } else
4852                             fill_cmd(cmd, O_IPTTL, 0, strtoul(*av, NULL, 0));
4853                         av++;
4854                         break;
4855
4856                 case TOK_IPID:
4857                         NEED1("ipid requires id");
4858                         if (strpbrk(*av, "-,")) {
4859                             if (!add_ports(cmd, *av, 0, O_IPID, cblen))
4860                                 errx(EX_DATAERR, "invalid ipid %s", *av);
4861                         } else
4862                             fill_cmd(cmd, O_IPID, 0, strtoul(*av, NULL, 0));
4863                         av++;
4864                         break;
4865
4866                 case TOK_IPLEN:
4867                         NEED1("iplen requires length");
4868                         if (strpbrk(*av, "-,")) {
4869                             if (!add_ports(cmd, *av, 0, O_IPLEN, cblen))
4870                                 errx(EX_DATAERR, "invalid ip len %s", *av);
4871                         } else
4872                             fill_cmd(cmd, O_IPLEN, 0, strtoul(*av, NULL, 0));
4873                         av++;
4874                         break;
4875
4876                 case TOK_IPVER:
4877                         NEED1("ipver requires version");
4878                         fill_cmd(cmd, O_IPVER, 0, strtoul(*av, NULL, 0));
4879                         av++;
4880                         break;
4881
4882                 case TOK_IPPRECEDENCE:
4883                         NEED1("ipprecedence requires value");
4884                         fill_cmd(cmd, O_IPPRECEDENCE, 0,
4885                             (strtoul(*av, NULL, 0) & 7) << 5);
4886                         av++;
4887                         break;
4888
4889                 case TOK_DSCP:
4890                         NEED1("missing DSCP code");
4891                         fill_dscp(cmd, *av, cblen);
4892                         av++;
4893                         break;
4894
4895                 case TOK_IPOPTS:
4896                         NEED1("missing argument for ipoptions");
4897                         fill_flags_cmd(cmd, O_IPOPT, f_ipopts, *av);
4898                         av++;
4899                         break;
4900
4901                 case TOK_IPTOS:
4902                         NEED1("missing argument for iptos");
4903                         fill_flags_cmd(cmd, O_IPTOS, f_iptos, *av);
4904                         av++;
4905                         break;
4906
4907                 case TOK_UID:
4908                         NEED1("uid requires argument");
4909                     {
4910                         char *end;
4911                         uid_t uid;
4912                         struct passwd *pwd;
4913
4914                         cmd->opcode = O_UID;
4915                         uid = strtoul(*av, &end, 0);
4916                         pwd = (*end == '\0') ? getpwuid(uid) : getpwnam(*av);
4917                         if (pwd == NULL)
4918                                 errx(EX_DATAERR, "uid \"%s\" nonexistent", *av);
4919                         cmd32->d[0] = pwd->pw_uid;
4920                         cmd->len |= F_INSN_SIZE(ipfw_insn_u32);
4921                         av++;
4922                     }
4923                         break;
4924
4925                 case TOK_GID:
4926                         NEED1("gid requires argument");
4927                     {
4928                         char *end;
4929                         gid_t gid;
4930                         struct group *grp;
4931
4932                         cmd->opcode = O_GID;
4933                         gid = strtoul(*av, &end, 0);
4934                         grp = (*end == '\0') ? getgrgid(gid) : getgrnam(*av);
4935                         if (grp == NULL)
4936                                 errx(EX_DATAERR, "gid \"%s\" nonexistent", *av);
4937                         cmd32->d[0] = grp->gr_gid;
4938                         cmd->len |= F_INSN_SIZE(ipfw_insn_u32);
4939                         av++;
4940                     }
4941                         break;
4942
4943                 case TOK_JAIL:
4944                         NEED1("jail requires argument");
4945                     {
4946                         char *end;
4947                         int jid;
4948
4949                         cmd->opcode = O_JAIL;
4950                         /*
4951                          * If av is a number, then we'll just pass it as-is.  If
4952                          * it's a name, try to resolve that to a jid.
4953                          *
4954                          * We save the jail_getid(3) call for a fallback because
4955                          * it entails an unconditional trip to the kernel to
4956                          * either validate a jid or resolve a name to a jid.
4957                          * This specific token doesn't currently require a
4958                          * jid to be an active jail, so we save a transition
4959                          * by simply using a number that we're given.
4960                          */
4961                         jid = strtoul(*av, &end, 10);
4962                         if (*end != '\0') {
4963                                 jid = jail_getid(*av);
4964                                 if (jid < 0)
4965                                     errx(EX_DATAERR, "%s", jail_errmsg);
4966                         }
4967                         cmd32->d[0] = (uint32_t)jid;
4968                         cmd->len |= F_INSN_SIZE(ipfw_insn_u32);
4969                         av++;
4970                     }
4971                         break;
4972
4973                 case TOK_ESTAB:
4974                         fill_cmd(cmd, O_ESTAB, 0, 0);
4975                         break;
4976
4977                 case TOK_SETUP:
4978                         fill_cmd(cmd, O_TCPFLAGS, 0,
4979                                 (TH_SYN) | ( (TH_ACK) & 0xff) <<8 );
4980                         break;
4981
4982                 case TOK_TCPDATALEN:
4983                         NEED1("tcpdatalen requires length");
4984                         if (strpbrk(*av, "-,")) {
4985                             if (!add_ports(cmd, *av, 0, O_TCPDATALEN, cblen))
4986                                 errx(EX_DATAERR, "invalid tcpdata len %s", *av);
4987                         } else
4988                             fill_cmd(cmd, O_TCPDATALEN, 0,
4989                                     strtoul(*av, NULL, 0));
4990                         av++;
4991                         break;
4992
4993                 case TOK_TCPOPTS:
4994                         NEED1("missing argument for tcpoptions");
4995                         fill_flags_cmd(cmd, O_TCPOPTS, f_tcpopts, *av);
4996                         av++;
4997                         break;
4998
4999                 case TOK_TCPSEQ:
5000                 case TOK_TCPACK:
5001                         NEED1("tcpseq/tcpack requires argument");
5002                         cmd->len = F_INSN_SIZE(ipfw_insn_u32);
5003                         cmd->opcode = (i == TOK_TCPSEQ) ? O_TCPSEQ : O_TCPACK;
5004                         cmd32->d[0] = htonl(strtoul(*av, NULL, 0));
5005                         av++;
5006                         break;
5007
5008                 case TOK_TCPMSS:
5009                 case TOK_TCPWIN:
5010                         NEED1("tcpmss/tcpwin requires size");
5011                         if (strpbrk(*av, "-,")) {
5012                                 if (add_ports(cmd, *av, 0,
5013                                     i == TOK_TCPWIN ? O_TCPWIN : O_TCPMSS,
5014                                     cblen) == NULL)
5015                                         errx(EX_DATAERR, "invalid %s size %s",
5016                                             s, *av);
5017                         } else
5018                                 fill_cmd(cmd, i == TOK_TCPWIN ? O_TCPWIN :
5019                                     O_TCPMSS, 0, strtoul(*av, NULL, 0));
5020                         av++;
5021                         break;
5022
5023                 case TOK_TCPFLAGS:
5024                         NEED1("missing argument for tcpflags");
5025                         cmd->opcode = O_TCPFLAGS;
5026                         fill_flags_cmd(cmd, O_TCPFLAGS, f_tcpflags, *av);
5027                         av++;
5028                         break;
5029
5030                 case TOK_KEEPSTATE:
5031                 case TOK_RECORDSTATE: {
5032                         uint16_t uidx;
5033
5034                         if (open_par)
5035                                 errx(EX_USAGE, "keep-state or record-state cannot be part "
5036                                     "of an or block");
5037                         if (have_state)
5038                                 errx(EX_USAGE, "only one of keep-state, record-state, "
5039                                         " limit and set-limit is allowed");
5040                         if (*av != NULL && *av[0] == ':') {
5041                                 if (state_check_name(*av + 1) != 0)
5042                                         errx(EX_DATAERR,
5043                                             "Invalid state name %s", *av);
5044                                 uidx = pack_object(tstate, *av + 1,
5045                                     IPFW_TLV_STATE_NAME);
5046                                 av++;
5047                         } else
5048                                 uidx = pack_object(tstate, default_state_name,
5049                                     IPFW_TLV_STATE_NAME);
5050                         have_state = cmd;
5051                         have_rstate = i == TOK_RECORDSTATE;
5052                         fill_cmd(cmd, O_KEEP_STATE, 0, uidx);
5053                         break;
5054                 }
5055
5056                 case TOK_LIMIT:
5057                 case TOK_SETLIMIT: {
5058                         ipfw_insn_limit *c = (ipfw_insn_limit *)cmd;
5059                         int val;
5060
5061                         if (open_par)
5062                                 errx(EX_USAGE,
5063                                     "limit or set-limit cannot be part of an or block");
5064                         if (have_state)
5065                                 errx(EX_USAGE, "only one of keep-state, record-state, "
5066                                         " limit and set-limit is allowed");
5067                         have_state = cmd;
5068                         have_rstate = i == TOK_SETLIMIT;
5069
5070                         cmd->len = F_INSN_SIZE(ipfw_insn_limit);
5071                         CHECK_CMDLEN;
5072                         cmd->opcode = O_LIMIT;
5073                         c->limit_mask = c->conn_limit = 0;
5074
5075                         while ( av[0] != NULL ) {
5076                                 if ((val = match_token(limit_masks, *av)) <= 0)
5077                                         break;
5078                                 c->limit_mask |= val;
5079                                 av++;
5080                         }
5081
5082                         if (c->limit_mask == 0)
5083                                 errx(EX_USAGE, "limit: missing limit mask");
5084
5085                         GET_UINT_ARG(c->conn_limit, IPFW_ARG_MIN, IPFW_ARG_MAX,
5086                             TOK_LIMIT, rule_options);
5087                         av++;
5088
5089                         if (*av != NULL && *av[0] == ':') {
5090                                 if (state_check_name(*av + 1) != 0)
5091                                         errx(EX_DATAERR,
5092                                             "Invalid state name %s", *av);
5093                                 cmd->arg1 = pack_object(tstate, *av + 1,
5094                                     IPFW_TLV_STATE_NAME);
5095                                 av++;
5096                         } else
5097                                 cmd->arg1 = pack_object(tstate,
5098                                     default_state_name, IPFW_TLV_STATE_NAME);
5099                         break;
5100                 }
5101
5102                 case TOK_PROTO:
5103                         NEED1("missing protocol");
5104                         if (add_proto(cmd, *av, &proto)) {
5105                                 av++;
5106                         } else
5107                                 errx(EX_DATAERR, "invalid protocol ``%s''",
5108                                     *av);
5109                         break;
5110
5111                 case TOK_SRCIP:
5112                         NEED1("missing source IP");
5113                         if (add_srcip(cmd, *av, cblen, tstate)) {
5114                                 av++;
5115                         }
5116                         break;
5117
5118                 case TOK_DSTIP:
5119                         NEED1("missing destination IP");
5120                         if (add_dstip(cmd, *av, cblen, tstate)) {
5121                                 av++;
5122                         }
5123                         break;
5124
5125                 case TOK_SRCIP6:
5126                         NEED1("missing source IP6");
5127                         if (add_srcip6(cmd, *av, cblen, tstate)) {
5128                                 av++;
5129                         }
5130                         break;
5131
5132                 case TOK_DSTIP6:
5133                         NEED1("missing destination IP6");
5134                         if (add_dstip6(cmd, *av, cblen, tstate)) {
5135                                 av++;
5136                         }
5137                         break;
5138
5139
5140                 case TOK_SRCMAC:
5141                         NEED1("missing source MAC");
5142                         if (add_srcmac(cmd, *av, tstate)) {
5143                                 av++;
5144                         }
5145                         break;
5146
5147                 case TOK_DSTMAC:
5148                         NEED1("missing destination MAC");
5149                         if (add_dstmac(cmd, *av, tstate)) {
5150                                 av++;
5151                         }
5152                         break;
5153
5154                 case TOK_SRCPORT:
5155                         NEED1("missing source port");
5156                         if (_substrcmp(*av, "any") == 0 ||
5157                             add_ports(cmd, *av, proto, O_IP_SRCPORT, cblen)) {
5158                                 av++;
5159                         } else
5160                                 errx(EX_DATAERR, "invalid source port %s", *av);
5161                         break;
5162
5163                 case TOK_DSTPORT:
5164                         NEED1("missing destination port");
5165                         if (_substrcmp(*av, "any") == 0 ||
5166                             add_ports(cmd, *av, proto, O_IP_DSTPORT, cblen)) {
5167                                 av++;
5168                         } else
5169                                 errx(EX_DATAERR, "invalid destination port %s",
5170                                     *av);
5171                         break;
5172
5173                 case TOK_MAC:
5174                         if (add_mac(cmd, av, cblen))
5175                                 av += 2;
5176                         break;
5177
5178                 case TOK_MACTYPE:
5179                         NEED1("missing mac type");
5180                         if (!add_mactype(cmd, *av, cblen))
5181                                 errx(EX_DATAERR, "invalid mac type %s", *av);
5182                         av++;
5183                         break;
5184
5185                 case TOK_VERREVPATH:
5186                         fill_cmd(cmd, O_VERREVPATH, 0, 0);
5187                         break;
5188
5189                 case TOK_VERSRCREACH:
5190                         fill_cmd(cmd, O_VERSRCREACH, 0, 0);
5191                         break;
5192
5193                 case TOK_ANTISPOOF:
5194                         fill_cmd(cmd, O_ANTISPOOF, 0, 0);
5195                         break;
5196
5197                 case TOK_IPSEC:
5198                         fill_cmd(cmd, O_IPSEC, 0, 0);
5199                         break;
5200
5201                 case TOK_IPV6:
5202                         fill_cmd(cmd, O_IP6, 0, 0);
5203                         break;
5204
5205                 case TOK_IPV4:
5206                         fill_cmd(cmd, O_IP4, 0, 0);
5207                         break;
5208
5209                 case TOK_EXT6HDR:
5210                         NEED1("missing extension header");
5211                         fill_ext6hdr( cmd, *av );
5212                         av++;
5213                         break;
5214
5215                 case TOK_FLOWID:
5216                         if (proto != IPPROTO_IPV6 )
5217                                 errx( EX_USAGE, "flow-id filter is active "
5218                                     "only for ipv6 protocol\n");
5219                         fill_flow6( (ipfw_insn_u32 *) cmd, *av, cblen);
5220                         av++;
5221                         break;
5222
5223                 case TOK_COMMENT:
5224                         fill_comment(cmd, av, cblen);
5225                         av[0]=NULL;
5226                         break;
5227
5228                 case TOK_TAGGED:
5229                         if (av[0] && strpbrk(*av, "-,")) {
5230                                 if (!add_ports(cmd, *av, 0, O_TAGGED, cblen))
5231                                         errx(EX_DATAERR, "tagged: invalid tag"
5232                                             " list: %s", *av);
5233                         }
5234                         else {
5235                                 uint16_t tag;
5236
5237                                 GET_UINT_ARG(tag, IPFW_ARG_MIN, IPFW_ARG_MAX,
5238                                     TOK_TAGGED, rule_options);
5239                                 fill_cmd(cmd, O_TAGGED, 0, tag);
5240                         }
5241                         av++;
5242                         break;
5243
5244                 case TOK_FIB:
5245                         NEED1("fib requires fib number");
5246                         fill_cmd(cmd, O_FIB, 0, strtoul(*av, NULL, 0));
5247                         av++;
5248                         break;
5249                 case TOK_SOCKARG:
5250                         fill_cmd(cmd, O_SOCKARG, 0, 0);
5251                         break;
5252
5253                 case TOK_LOOKUP: {
5254                         ipfw_insn_u32 *c = (ipfw_insn_u32 *)cmd;
5255
5256                         if (!av[0] || !av[1])
5257                                 errx(EX_USAGE, "format: lookup argument tablenum");
5258                         cmd->opcode = O_IP_DST_LOOKUP;
5259                         cmd->len |= F_INSN_SIZE(ipfw_insn) + 2;
5260                         i = match_token(lookup_keys, *av);
5261                         if (i == -1)
5262                                 errx(EX_USAGE, "format: cannot lookup on %s", *av);
5263                         __PAST_END(c->d, 1) = i;
5264                         av++;
5265
5266                         if ((i = pack_table(tstate, *av)) == 0)
5267                                 errx(EX_DATAERR, "Invalid table name: %s", *av);
5268
5269                         cmd->arg1 = i;
5270                         av++;
5271                         }
5272                         break;
5273                 case TOK_FLOW:
5274                         NEED1("missing table name");
5275                         if (strncmp(*av, "table(", 6) != 0)
5276                                 errx(EX_DATAERR,
5277                                     "enclose table name into \"table()\"");
5278                         fill_table(cmd, *av, O_IP_FLOW_LOOKUP, tstate);
5279                         av++;
5280                         break;
5281
5282                 case TOK_SKIPACTION:
5283                         if (have_skipcmd)
5284                                 errx(EX_USAGE, "only one defer-action "
5285                                         "is allowed");
5286                         have_skipcmd = cmd;
5287                         fill_cmd(cmd, O_SKIP_ACTION, 0, 0);
5288                         break;
5289
5290                 case TOK_MARK:
5291                         NEED1("missing mark value:mask");
5292                         fill_mark(cmd, *av, cblen);
5293                         av++;
5294                         break;
5295
5296                 default:
5297                         errx(EX_USAGE, "unrecognised option [%d] %s\n", i, s);
5298                 }
5299                 if (F_LEN(cmd) > 0) {   /* prepare to advance */
5300                         prev = cmd;
5301                         cmd = next_cmd(cmd, &cblen);
5302                 }
5303         }
5304
5305 done:
5306
5307         if (!have_state && have_skipcmd)
5308                 warnx("Rule contains \"defer-immediate-action\" "
5309                         "and doesn't contain any state-related options.");
5310
5311         /*
5312          * Now copy stuff into the rule.
5313          * If we have a keep-state option, the first instruction
5314          * must be a PROBE_STATE (which is generated here).
5315          * If we have a LOG option, it was stored as the first command,
5316          * and now must be moved to the top of the action part.
5317          */
5318         dst = (ipfw_insn *)rule->cmd;
5319
5320         /*
5321          * First thing to write into the command stream is the match probability.
5322          */
5323         if (match_prob != 1) { /* 1 means always match */
5324                 dst->opcode = O_PROB;
5325                 dst->len = 2;
5326                 *((int32_t *)(dst+1)) = (int32_t)(match_prob * 0x7fffffff);
5327                 dst += dst->len;
5328         }
5329
5330         /*
5331          * generate O_PROBE_STATE if necessary
5332          */
5333         if (have_state && have_state->opcode != O_CHECK_STATE && !have_rstate) {
5334                 fill_cmd(dst, O_PROBE_STATE, 0, have_state->arg1);
5335                 dst = next_cmd(dst, &rblen);
5336         }
5337
5338         /*
5339          * copy all commands but O_LOG, O_KEEP_STATE, O_LIMIT, O_ALTQ, O_TAG,
5340          * O_SKIP_ACTION
5341          */
5342         for (src = (ipfw_insn *)cmdbuf; src != cmd; src += i) {
5343                 i = F_LEN(src);
5344                 CHECK_RBUFLEN(i);
5345
5346                 switch (src->opcode) {
5347                 case O_LOG:
5348                 case O_KEEP_STATE:
5349                 case O_LIMIT:
5350                 case O_ALTQ:
5351                 case O_TAG:
5352                 case O_SKIP_ACTION:
5353                         break;
5354                 default:
5355                         bcopy(src, dst, i * sizeof(uint32_t));
5356                         dst += i;
5357                 }
5358         }
5359
5360         /*
5361          * put back the have_state command as last opcode
5362          */
5363         if (have_state && have_state->opcode != O_CHECK_STATE) {
5364                 i = F_LEN(have_state);
5365                 CHECK_RBUFLEN(i);
5366                 bcopy(have_state, dst, i * sizeof(uint32_t));
5367                 dst += i;
5368         }
5369
5370         /*
5371          * put back the have_skipcmd command as very last opcode
5372          */
5373         if (have_skipcmd) {
5374                 i = F_LEN(have_skipcmd);
5375                 CHECK_RBUFLEN(i);
5376                 bcopy(have_skipcmd, dst, i * sizeof(uint32_t));
5377                 dst += i;
5378         }
5379
5380         /*
5381          * start action section
5382          */
5383         rule->act_ofs = dst - rule->cmd;
5384
5385         /* put back O_LOG, O_ALTQ, O_TAG if necessary */
5386         if (have_log) {
5387                 i = F_LEN(have_log);
5388                 CHECK_RBUFLEN(i);
5389                 bcopy(have_log, dst, i * sizeof(uint32_t));
5390                 dst += i;
5391         }
5392         if (have_altq) {
5393                 i = F_LEN(have_altq);
5394                 CHECK_RBUFLEN(i);
5395                 bcopy(have_altq, dst, i * sizeof(uint32_t));
5396                 dst += i;
5397         }
5398         if (have_tag) {
5399                 i = F_LEN(have_tag);
5400                 CHECK_RBUFLEN(i);
5401                 bcopy(have_tag, dst, i * sizeof(uint32_t));
5402                 dst += i;
5403         }
5404
5405         /*
5406          * copy all other actions
5407          */
5408         for (src = (ipfw_insn *)actbuf; src != action; src += i) {
5409                 i = F_LEN(src);
5410                 CHECK_RBUFLEN(i);
5411                 bcopy(src, dst, i * sizeof(uint32_t));
5412                 dst += i;
5413         }
5414
5415         rule->cmd_len = (uint32_t *)dst - (uint32_t *)(rule->cmd);
5416         *rbufsize = (char *)dst - (char *)rule;
5417 }
5418
5419 static int
5420 compare_ntlv(const void *_a, const void *_b)
5421 {
5422         const ipfw_obj_ntlv *a, *b;
5423
5424         a = (const ipfw_obj_ntlv *)_a;
5425         b = (const ipfw_obj_ntlv *)_b;
5426
5427         if (a->set < b->set)
5428                 return (-1);
5429         else if (a->set > b->set)
5430                 return (1);
5431
5432         if (a->idx < b->idx)
5433                 return (-1);
5434         else if (a->idx > b->idx)
5435                 return (1);
5436
5437         if (a->head.type < b->head.type)
5438                 return (-1);
5439         else if (a->head.type > b->head.type)
5440                 return (1);
5441
5442         return (0);
5443 }
5444
5445 /*
5446  * Provide kernel with sorted list of referenced objects
5447  */
5448 static void
5449 object_sort_ctlv(ipfw_obj_ctlv *ctlv)
5450 {
5451
5452         qsort(ctlv + 1, ctlv->count, ctlv->objsize, compare_ntlv);
5453 }
5454
5455 struct object_kt {
5456         uint16_t        uidx;
5457         uint16_t        type;
5458 };
5459 static int
5460 compare_object_kntlv(const void *k, const void *v)
5461 {
5462         const ipfw_obj_ntlv *ntlv;
5463         struct object_kt key;
5464
5465         key = *((const struct object_kt *)k);
5466         ntlv = (const ipfw_obj_ntlv *)v;
5467
5468         if (key.uidx < ntlv->idx)
5469                 return (-1);
5470         else if (key.uidx > ntlv->idx)
5471                 return (1);
5472
5473         if (key.type < ntlv->head.type)
5474                 return (-1);
5475         else if (key.type > ntlv->head.type)
5476                 return (1);
5477
5478         return (0);
5479 }
5480
5481 /*
5482  * Finds object name in @ctlv by @idx and @type.
5483  * Uses the following facts:
5484  * 1) All TLVs are the same size
5485  * 2) Kernel implementation provides already sorted list.
5486  *
5487  * Returns table name or NULL.
5488  */
5489 static char *
5490 object_search_ctlv(ipfw_obj_ctlv *ctlv, uint16_t idx, uint16_t type)
5491 {
5492         ipfw_obj_ntlv *ntlv;
5493         struct object_kt key;
5494
5495         key.uidx = idx;
5496         key.type = type;
5497
5498         ntlv = bsearch(&key, (ctlv + 1), ctlv->count, ctlv->objsize,
5499             compare_object_kntlv);
5500
5501         if (ntlv != NULL)
5502                 return (ntlv->name);
5503
5504         return (NULL);
5505 }
5506
5507 static char *
5508 table_search_ctlv(ipfw_obj_ctlv *ctlv, uint16_t idx)
5509 {
5510
5511         return (object_search_ctlv(ctlv, idx, IPFW_TLV_TBL_NAME));
5512 }
5513
5514 /*
5515  * Adds one or more rules to ipfw chain.
5516  * Data layout:
5517  * Request:
5518  * [
5519  *   ip_fw3_opheader
5520  *   [ ipfw_obj_ctlv(IPFW_TLV_TBL_LIST) ipfw_obj_ntlv x N ] (optional *1)
5521  *   [ ipfw_obj_ctlv(IPFW_TLV_RULE_LIST) [ ip_fw_rule ip_fw_insn ] x N ] (*2) (*3)
5522  * ]
5523  * Reply:
5524  * [
5525  *   ip_fw3_opheader
5526  *   [ ipfw_obj_ctlv(IPFW_TLV_TBL_LIST) ipfw_obj_ntlv x N ] (optional)
5527  *   [ ipfw_obj_ctlv(IPFW_TLV_RULE_LIST) [ ip_fw_rule ip_fw_insn ] x N ]
5528  * ]
5529  *
5530  * Rules in reply are modified to store their actual ruleset number.
5531  *
5532  * (*1) TLVs inside IPFW_TLV_TBL_LIST needs to be sorted ascending
5533  * according to their idx field and there has to be no duplicates.
5534  * (*2) Numbered rules inside IPFW_TLV_RULE_LIST needs to be sorted ascending.
5535  * (*3) Each ip_fw structure needs to be aligned to u64 boundary.
5536  */
5537 void
5538 ipfw_add(char *av[])
5539 {
5540         uint32_t rulebuf[1024];
5541         int rbufsize, default_off, tlen, rlen;
5542         size_t sz;
5543         struct tidx ts;
5544         struct ip_fw_rule *rule;
5545         caddr_t tbuf;
5546         ip_fw3_opheader *op3;
5547         ipfw_obj_ctlv *ctlv, *tstate;
5548
5549         rbufsize = sizeof(rulebuf);
5550         memset(rulebuf, 0, rbufsize);
5551         memset(&ts, 0, sizeof(ts));
5552
5553         /* Optimize case with no tables */
5554         default_off = sizeof(ipfw_obj_ctlv) + sizeof(ip_fw3_opheader);
5555         op3 = (ip_fw3_opheader *)rulebuf;
5556         ctlv = (ipfw_obj_ctlv *)(op3 + 1);
5557         rule = (struct ip_fw_rule *)(ctlv + 1);
5558         rbufsize -= default_off;
5559
5560         compile_rule(av, (uint32_t *)rule, &rbufsize, &ts);
5561         /* Align rule size to u64 boundary */
5562         rlen = roundup2(rbufsize, sizeof(uint64_t));
5563
5564         tbuf = NULL;
5565         sz = 0;
5566         tstate = NULL;
5567         if (ts.count != 0) {
5568                 /* Some tables. We have to alloc more data */
5569                 tlen = ts.count * sizeof(ipfw_obj_ntlv);
5570                 sz = default_off + sizeof(ipfw_obj_ctlv) + tlen + rlen;
5571
5572                 if ((tbuf = calloc(1, sz)) == NULL)
5573                         err(EX_UNAVAILABLE, "malloc() failed for IP_FW_ADD");
5574                 op3 = (ip_fw3_opheader *)tbuf;
5575                 /* Tables first */
5576                 ctlv = (ipfw_obj_ctlv *)(op3 + 1);
5577                 ctlv->head.type = IPFW_TLV_TBLNAME_LIST;
5578                 ctlv->head.length = sizeof(ipfw_obj_ctlv) + tlen;
5579                 ctlv->count = ts.count;
5580                 ctlv->objsize = sizeof(ipfw_obj_ntlv);
5581                 memcpy(ctlv + 1, ts.idx, tlen);
5582                 object_sort_ctlv(ctlv);
5583                 tstate = ctlv;
5584                 /* Rule next */
5585                 ctlv = (ipfw_obj_ctlv *)((caddr_t)ctlv + ctlv->head.length);
5586                 ctlv->head.type = IPFW_TLV_RULE_LIST;
5587                 ctlv->head.length = sizeof(ipfw_obj_ctlv) + rlen;
5588                 ctlv->count = 1;
5589                 memcpy(ctlv + 1, rule, rbufsize);
5590         } else {
5591                 /* Simply add header */
5592                 sz = rlen + default_off;
5593                 memset(ctlv, 0, sizeof(*ctlv));
5594                 ctlv->head.type = IPFW_TLV_RULE_LIST;
5595                 ctlv->head.length = sizeof(ipfw_obj_ctlv) + rlen;
5596                 ctlv->count = 1;
5597         }
5598
5599         if (do_get3(IP_FW_XADD, op3, &sz) != 0)
5600                 err(EX_UNAVAILABLE, "getsockopt(%s)", "IP_FW_XADD");
5601
5602         if (!g_co.do_quiet) {
5603                 struct format_opts sfo;
5604                 struct buf_pr bp;
5605                 memset(&sfo, 0, sizeof(sfo));
5606                 sfo.tstate = tstate;
5607                 sfo.set_mask = (uint32_t)(-1);
5608                 bp_alloc(&bp, 4096);
5609                 show_static_rule(&g_co, &sfo, &bp, rule, NULL);
5610                 printf("%s", bp.buf);
5611                 bp_free(&bp);
5612         }
5613
5614         if (tbuf != NULL)
5615                 free(tbuf);
5616
5617         if (ts.idx != NULL)
5618                 free(ts.idx);
5619 }
5620
5621 /*
5622  * clear the counters or the log counters.
5623  * optname has the following values:
5624  *  0 (zero both counters and logging)
5625  *  1 (zero logging only)
5626  */
5627 void
5628 ipfw_zero(int ac, char *av[], int optname)
5629 {
5630         ipfw_range_tlv rt;
5631         char const *errstr;
5632         char const *name = optname ? "RESETLOG" : "ZERO";
5633         uint32_t arg;
5634         int failed = EX_OK;
5635
5636         optname = optname ? IP_FW_XRESETLOG : IP_FW_XZERO;
5637         av++; ac--;
5638
5639         if (ac == 0) {
5640                 /* clear all entries */
5641                 memset(&rt, 0, sizeof(rt));
5642                 rt.flags = IPFW_RCFLAG_ALL;
5643                 if (do_range_cmd(optname, &rt) < 0)
5644                         err(EX_UNAVAILABLE, "setsockopt(IP_FW_X%s)", name);
5645                 if (!g_co.do_quiet)
5646                         printf("%s.\n", optname == IP_FW_XZERO ?
5647                             "Accounting cleared":"Logging counts reset");
5648
5649                 return;
5650         }
5651
5652         while (ac) {
5653                 /* Rule number */
5654                 if (isdigit(**av)) {
5655                         arg = strtonum(*av, 0, 0xffff, &errstr);
5656                         if (errstr)
5657                                 errx(EX_DATAERR,
5658                                     "invalid rule number %s\n", *av);
5659                         memset(&rt, 0, sizeof(rt));
5660                         rt.start_rule = arg;
5661                         rt.end_rule = arg;
5662                         rt.flags |= IPFW_RCFLAG_RANGE;
5663                         if (g_co.use_set != 0) {
5664                                 rt.set = g_co.use_set - 1;
5665                                 rt.flags |= IPFW_RCFLAG_SET;
5666                         }
5667                         if (do_range_cmd(optname, &rt) != 0) {
5668                                 warn("rule %u: setsockopt(IP_FW_X%s)",
5669                                     arg, name);
5670                                 failed = EX_UNAVAILABLE;
5671                         } else if (rt.new_set == 0) {
5672                                 printf("Entry %d not found\n", arg);
5673                                 failed = EX_UNAVAILABLE;
5674                         } else if (!g_co.do_quiet)
5675                                 printf("Entry %d %s.\n", arg,
5676                                     optname == IP_FW_XZERO ?
5677                                         "cleared" : "logging count reset");
5678                 } else {
5679                         errx(EX_USAGE, "invalid rule number ``%s''", *av);
5680                 }
5681                 av++; ac--;
5682         }
5683         if (failed != EX_OK)
5684                 exit(failed);
5685 }
5686
5687 void
5688 ipfw_flush(int force)
5689 {
5690         ipfw_range_tlv rt;
5691
5692         if (!force && !g_co.do_quiet) { /* need to ask user */
5693                 int c;
5694
5695                 printf("Are you sure? [yn] ");
5696                 fflush(stdout);
5697                 do {
5698                         c = toupper(getc(stdin));
5699                         while (c != '\n' && getc(stdin) != '\n')
5700                                 if (feof(stdin))
5701                                         return; /* and do not flush */
5702                 } while (c != 'Y' && c != 'N');
5703                 printf("\n");
5704                 if (c == 'N')   /* user said no */
5705                         return;
5706         }
5707         if (g_co.do_pipe) {
5708                 dummynet_flush();
5709                 return;
5710         }
5711         /* `ipfw set N flush` - is the same that `ipfw delete set N` */
5712         memset(&rt, 0, sizeof(rt));
5713         if (g_co.use_set != 0) {
5714                 rt.set = g_co.use_set - 1;
5715                 rt.flags = IPFW_RCFLAG_SET;
5716         } else
5717                 rt.flags = IPFW_RCFLAG_ALL;
5718         if (do_range_cmd(IP_FW_XDEL, &rt) != 0)
5719                         err(EX_UNAVAILABLE, "setsockopt(IP_FW_XDEL)");
5720         if (!g_co.do_quiet)
5721                 printf("Flushed all %s.\n", g_co.do_pipe ? "pipes" : "rules");
5722 }
5723
5724 static struct _s_x intcmds[] = {
5725       { "talist",       TOK_TALIST },
5726       { "iflist",       TOK_IFLIST },
5727       { "olist",        TOK_OLIST },
5728       { "vlist",        TOK_VLIST },
5729       { NULL, 0 }
5730 };
5731
5732 static struct _s_x otypes[] = {
5733         { "EACTION",    IPFW_TLV_EACTION },
5734         { "DYNSTATE",   IPFW_TLV_STATE_NAME },
5735         { NULL, 0 }
5736 };
5737
5738 static const char*
5739 lookup_eaction_name(ipfw_obj_ntlv *ntlv, int cnt, uint16_t type)
5740 {
5741         const char *name;
5742         int i;
5743
5744         name = NULL;
5745         for (i = 0; i < cnt; i++) {
5746                 if (ntlv[i].head.type != IPFW_TLV_EACTION)
5747                         continue;
5748                 if (IPFW_TLV_EACTION_NAME(ntlv[i].idx) != type)
5749                         continue;
5750                 name = ntlv[i].name;
5751                 break;
5752         }
5753         return (name);
5754 }
5755
5756 static void
5757 ipfw_list_objects(int ac __unused, char *av[] __unused)
5758 {
5759         ipfw_obj_lheader req, *olh;
5760         ipfw_obj_ntlv *ntlv;
5761         const char *name;
5762         size_t sz;
5763         uint32_t i;
5764
5765         memset(&req, 0, sizeof(req));
5766         sz = sizeof(req);
5767         if (do_get3(IP_FW_DUMP_SRVOBJECTS, &req.opheader, &sz) != 0)
5768                 if (errno != ENOMEM)
5769                         return;
5770
5771         sz = req.size;
5772         if ((olh = calloc(1, sz)) == NULL)
5773                 return;
5774
5775         olh->size = sz;
5776         if (do_get3(IP_FW_DUMP_SRVOBJECTS, &olh->opheader, &sz) != 0) {
5777                 free(olh);
5778                 return;
5779         }
5780
5781         if (olh->count > 0)
5782                 printf("Objects list:\n");
5783         else
5784                 printf("There are no objects\n");
5785         ntlv = (ipfw_obj_ntlv *)(olh + 1);
5786         for (i = 0; i < olh->count; i++) {
5787                 name = match_value(otypes, ntlv->head.type);
5788                 if (name == NULL)
5789                         name = lookup_eaction_name(
5790                             (ipfw_obj_ntlv *)(olh + 1), olh->count,
5791                             ntlv->head.type);
5792                 if (name == NULL)
5793                         printf(" kidx: %4d\ttype: %10d\tname: %s\n",
5794                             ntlv->idx, ntlv->head.type, ntlv->name);
5795                 else
5796                         printf(" kidx: %4d\ttype: %10s\tname: %s\n",
5797                             ntlv->idx, name, ntlv->name);
5798                 ntlv++;
5799         }
5800         free(olh);
5801 }
5802
5803 void
5804 ipfw_internal_handler(int ac, char *av[])
5805 {
5806         int tcmd;
5807
5808         ac--; av++;
5809         NEED1("internal cmd required");
5810
5811         if ((tcmd = match_token(intcmds, *av)) == -1)
5812                 errx(EX_USAGE, "invalid internal sub-cmd: %s", *av);
5813
5814         switch (tcmd) {
5815         case TOK_IFLIST:
5816                 ipfw_list_tifaces();
5817                 break;
5818         case TOK_TALIST:
5819                 ipfw_list_ta(ac, av);
5820                 break;
5821         case TOK_OLIST:
5822                 ipfw_list_objects(ac, av);
5823                 break;
5824         case TOK_VLIST:
5825                 ipfw_list_values(ac, av);
5826                 break;
5827         }
5828 }
5829
5830 static int
5831 ipfw_get_tracked_ifaces(ipfw_obj_lheader **polh)
5832 {
5833         ipfw_obj_lheader req, *olh;
5834         size_t sz;
5835
5836         memset(&req, 0, sizeof(req));
5837         sz = sizeof(req);
5838
5839         if (do_get3(IP_FW_XIFLIST, &req.opheader, &sz) != 0) {
5840                 if (errno != ENOMEM)
5841                         return (errno);
5842         }
5843
5844         sz = req.size;
5845         if ((olh = calloc(1, sz)) == NULL)
5846                 return (ENOMEM);
5847
5848         olh->size = sz;
5849         if (do_get3(IP_FW_XIFLIST, &olh->opheader, &sz) != 0) {
5850                 free(olh);
5851                 return (errno);
5852         }
5853
5854         *polh = olh;
5855         return (0);
5856 }
5857
5858 static int
5859 ifinfo_cmp(const void *a, const void *b)
5860 {
5861         const ipfw_iface_info *ia, *ib;
5862
5863         ia = (const ipfw_iface_info *)a;
5864         ib = (const ipfw_iface_info *)b;
5865
5866         return (stringnum_cmp(ia->ifname, ib->ifname));
5867 }
5868
5869 /*
5870  * Retrieves table list from kernel,
5871  * optionally sorts it and calls requested function for each table.
5872  * Returns 0 on success.
5873  */
5874 static void
5875 ipfw_list_tifaces(void)
5876 {
5877         ipfw_obj_lheader *olh = NULL;
5878         ipfw_iface_info *info;
5879         uint32_t i;
5880         int error;
5881
5882         if ((error = ipfw_get_tracked_ifaces(&olh)) != 0)
5883                 err(EX_OSERR, "Unable to request ipfw tracked interface list");
5884
5885         qsort(olh + 1, olh->count, olh->objsize, ifinfo_cmp);
5886
5887         info = (ipfw_iface_info *)(olh + 1);
5888         for (i = 0; i < olh->count; i++) {
5889                 if (info->flags & IPFW_IFFLAG_RESOLVED)
5890                         printf("%s ifindex: %d refcount: %u changes: %u\n",
5891                             info->ifname, info->ifindex, info->refcnt,
5892                             info->gencnt);
5893                 else
5894                         printf("%s ifindex: unresolved refcount: %u changes: %u\n",
5895                             info->ifname, info->refcnt, info->gencnt);
5896                 info = (ipfw_iface_info *)((caddr_t)info + olh->objsize);
5897         }
5898
5899         free(olh);
5900 }