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
  21 #include <sys/types.h>
  22 #include <sys/param.h>
  23 #include <sys/socket.h>
  24 #include <sys/sockio.h>
  25 #include <sys/sysctl.h>
  26
  27 #include "ipfw2.h"
  28
  29 #include <ctype.h>
  30 #include <err.h>
  31 #include <errno.h>
  32 #include <grp.h>
  33 #include <jail.h>
  34 #include <netdb.h>
  35 #include <pwd.h>
  36 #include <stdio.h>
  37 #include <stdarg.h>
  38 #include <stdint.h>
  39 #include <stdlib.h>
  40 #include <string.h>
  41 #include <sysexits.h>
  42 #include <time.h>       /* ctime */
  43 #include <timeconv.h>   /* _long_to_time */
  44 #include <unistd.h>
  45 #include <fcntl.h>
  46 #include <stddef.h>     /* offsetof */
  47
  48 #include <net/ethernet.h>
  49 #include <net/if.h>             /* only IFNAMSIZ */
  50 #include <netinet/in.h>
  51 #include <netinet/in_systm.h>   /* only n_short, n_long */
  52 #include <netinet/ip.h>
  53 #include <netinet/ip_icmp.h>
  54 #include <netinet/ip_fw.h>
  55 #include <netinet/tcp.h>
  56 #include <arpa/inet.h>
  57
  58 struct cmdline_opts g_co;       /* global options */
  59
  60 struct format_opts {
  61         int bcwidth;
  62         int pcwidth;
  63         int show_counters;
  64         int show_time;          /* show timestamp */
  65         uint32_t set_mask;      /* enabled sets mask */
  66         uint32_t flags;         /* request flags */
  67         uint32_t first;         /* first rule to request */
  68         uint32_t last;          /* last rule to request */
  69         uint32_t dcnt;          /* number of dynamic states */
  70         ipfw_obj_ctlv *tstate;  /* table state data */
  71 };
  72
  73 int resvd_set_number = RESVD_SET;
  74
  75 static int ipfw_socket = -1;
  76
  77 #define CHECK_LENGTH(v, len) do {                               \
  78         if ((v) < (len))                                        \
  79                 errx(EX_DATAERR, "Rule too long");              \
  80         } while (0)
  81 /*
  82  * Check if we have enough space in cmd buffer. Note that since
  83  * first 8? u32 words are reserved by reserved header, full cmd
  84  * buffer can't be used, so we need to protect from buffer overrun
  85  * only. At the beginning, cblen is less than actual buffer size by
  86  * size of ipfw_insn_u32 instruction + 1 u32 work. This eliminates need
  87  * for checking small instructions fitting in given range.
  88  * We also (ab)use the fact that ipfw_insn is always the first field
  89  * for any custom instruction.
  90  */
  91 #define CHECK_CMDLEN    CHECK_LENGTH(cblen, F_LEN((ipfw_insn *)cmd))
  92
  93 #define GET_UINT_ARG(arg, min, max, tok, s_x) do {                      \
  94         if (!av[0])                                                     \
  95                 errx(EX_USAGE, "%s: missing argument", match_value(s_x, tok)); \
  96         if (_substrcmp(*av, "tablearg") == 0) {                         \
  97                 arg = IP_FW_TARG;                                       \
  98                 break;                                                  \
  99         }                                                               \
 100                                                                         \
 101         {                                                               \
 102         long _xval;                                                     \
 103         char *end;                                                      \
 104                                                                         \
 105         _xval = strtol(*av, &end, 10);                                  \
 106                                                                         \
 107         if (!isdigit(**av) || *end != '\0' || (_xval == 0 && errno == EINVAL)) \
 108                 errx(EX_DATAERR, "%s: invalid argument: %s",            \
 109                     match_value(s_x, tok), *av);                        \
 110                                                                         \
 111         if (errno == ERANGE || _xval < min || _xval > max)              \
 112                 errx(EX_DATAERR, "%s: argument is out of range (%u..%u): %s", \
 113                     match_value(s_x, tok), min, max, *av);              \
 114                                                                         \
 115         if (_xval == IP_FW_TARG)                                        \
 116                 errx(EX_DATAERR, "%s: illegal argument value: %s",      \
 117                     match_value(s_x, tok), *av);                        \
 118         arg = _xval;                                                    \
 119         }                                                               \
 120 } while (0)
 121
 122 static struct _s_x f_tcpflags[] = {
 123         { "syn", TH_SYN },
 124         { "fin", TH_FIN },
 125         { "ack", TH_ACK },
 126         { "psh", TH_PUSH },
 127         { "rst", TH_RST },
 128         { "urg", TH_URG },
 129         { "tcp flag", 0 },
 130         { NULL, 0 }
 131 };
 132
 133 static struct _s_x f_tcpopts[] = {
 134         { "mss",        IP_FW_TCPOPT_MSS },
 135         { "maxseg",     IP_FW_TCPOPT_MSS },
 136         { "window",     IP_FW_TCPOPT_WINDOW },
 137         { "sack",       IP_FW_TCPOPT_SACK },
 138         { "ts",         IP_FW_TCPOPT_TS },
 139         { "timestamp",  IP_FW_TCPOPT_TS },
 140         { "cc",         IP_FW_TCPOPT_CC },
 141         { "tcp option", 0 },
 142         { NULL, 0 }
 143 };
 144
 145 /*
 146  * IP options span the range 0 to 255 so we need to remap them
 147  * (though in fact only the low 5 bits are significant).
 148  */
 149 static struct _s_x f_ipopts[] = {
 150         { "ssrr",       IP_FW_IPOPT_SSRR},
 151         { "lsrr",       IP_FW_IPOPT_LSRR},
 152         { "rr",         IP_FW_IPOPT_RR},
 153         { "ts",         IP_FW_IPOPT_TS},
 154         { "ip option",  0 },
 155         { NULL, 0 }
 156 };
 157
 158 static struct _s_x f_iptos[] = {
 159         { "lowdelay",   IPTOS_LOWDELAY},
 160         { "throughput", IPTOS_THROUGHPUT},
 161         { "reliability", IPTOS_RELIABILITY},
 162         { "mincost",    IPTOS_MINCOST},
 163         { "congestion", IPTOS_ECN_CE},
 164         { "ecntransport", IPTOS_ECN_ECT0},
 165         { "ip tos option", 0},
 166         { NULL, 0 }
 167 };
 168
 169 static struct _s_x f_ipoff[] = {
 170         { "rf", IP_RF >> 8 },
 171         { "df", IP_DF >> 8 },
 172         { "mf", IP_MF >> 8 },
 173         { "offset", 0x1 },
 174         { NULL, 0}
 175 };
 176
 177 struct _s_x f_ipdscp[] = {
 178         { "af11", IPTOS_DSCP_AF11 >> 2 },       /* 001010 */
 179         { "af12", IPTOS_DSCP_AF12 >> 2 },       /* 001100 */
 180         { "af13", IPTOS_DSCP_AF13 >> 2 },       /* 001110 */
 181         { "af21", IPTOS_DSCP_AF21 >> 2 },       /* 010010 */
 182         { "af22", IPTOS_DSCP_AF22 >> 2 },       /* 010100 */
 183         { "af23", IPTOS_DSCP_AF23 >> 2 },       /* 010110 */
 184         { "af31", IPTOS_DSCP_AF31 >> 2 },       /* 011010 */
 185         { "af32", IPTOS_DSCP_AF32 >> 2 },       /* 011100 */
 186         { "af33", IPTOS_DSCP_AF33 >> 2 },       /* 011110 */
 187         { "af41", IPTOS_DSCP_AF41 >> 2 },       /* 100010 */
 188         { "af42", IPTOS_DSCP_AF42 >> 2 },       /* 100100 */
 189         { "af43", IPTOS_DSCP_AF43 >> 2 },       /* 100110 */
 190         { "be", IPTOS_DSCP_CS0 >> 2 },  /* 000000 */
 191         { "va", IPTOS_DSCP_VA >> 2 },   /* 101100 */
 192         { "ef", IPTOS_DSCP_EF >> 2 },   /* 101110 */
 193         { "cs0", IPTOS_DSCP_CS0 >> 2 }, /* 000000 */
 194         { "cs1", IPTOS_DSCP_CS1 >> 2 }, /* 001000 */
 195         { "cs2", IPTOS_DSCP_CS2 >> 2 }, /* 010000 */
 196         { "cs3", IPTOS_DSCP_CS3 >> 2 }, /* 011000 */
 197         { "cs4", IPTOS_DSCP_CS4 >> 2 }, /* 100000 */
 198         { "cs5", IPTOS_DSCP_CS5 >> 2 }, /* 101000 */
 199         { "cs6", IPTOS_DSCP_CS6 >> 2 }, /* 110000 */
 200         { "cs7", IPTOS_DSCP_CS7 >> 2 }, /* 100000 */
 201         { NULL, 0 }
 202 };
 203
 204 static struct _s_x limit_masks[] = {
 205         {"all",         DYN_SRC_ADDR|DYN_SRC_PORT|DYN_DST_ADDR|DYN_DST_PORT},
 206         {"src-addr",    DYN_SRC_ADDR},
 207         {"src-port",    DYN_SRC_PORT},
 208         {"dst-addr",    DYN_DST_ADDR},
 209         {"dst-port",    DYN_DST_PORT},
 210         {NULL,          0}
 211 };
 212
 213 /*
 214  * we use IPPROTO_ETHERTYPE as a fake protocol id to call the print routines
 215  * This is only used in this code.
 216  */
 217 #define IPPROTO_ETHERTYPE       0x1000
 218 static struct _s_x ether_types[] = {
 219     /*
 220      * Note, we cannot use "-:&/" in the names because they are field
 221      * separators in the type specifications. Also, we use s = NULL as
 222      * end-delimiter, because a type of 0 can be legal.
 223      */
 224         { "ip",         0x0800 },
 225         { "ipv4",       0x0800 },
 226         { "ipv6",       0x86dd },
 227         { "arp",        0x0806 },
 228         { "rarp",       0x8035 },
 229         { "vlan",       0x8100 },
 230         { "loop",       0x9000 },
 231         { "trail",      0x1000 },
 232         { "at",         0x809b },
 233         { "atalk",      0x809b },
 234         { "aarp",       0x80f3 },
 235         { "pppoe_disc", 0x8863 },
 236         { "pppoe_sess", 0x8864 },
 237         { "ipx_8022",   0x00E0 },
 238         { "ipx_8023",   0x0000 },
 239         { "ipx_ii",     0x8137 },
 240         { "ipx_snap",   0x8137 },
 241         { "ipx",        0x8137 },
 242         { "ns",         0x0600 },
 243         { NULL,         0 }
 244 };
 245
 246 static struct _s_x rule_eactions[] = {
 247         { "nat64clat",          TOK_NAT64CLAT },
 248         { "nat64lsn",           TOK_NAT64LSN },
 249         { "nat64stl",           TOK_NAT64STL },
 250         { "nptv6",              TOK_NPTV6 },
 251         { "tcp-setmss",         TOK_TCPSETMSS },
 252         { NULL, 0 }     /* terminator */
 253 };
 254
 255 static struct _s_x rule_actions[] = {
 256         { "abort6",             TOK_ABORT6 },
 257         { "abort",              TOK_ABORT },
 258         { "accept",             TOK_ACCEPT },
 259         { "pass",               TOK_ACCEPT },
 260         { "allow",              TOK_ACCEPT },
 261         { "permit",             TOK_ACCEPT },
 262         { "count",              TOK_COUNT },
 263         { "pipe",               TOK_PIPE },
 264         { "queue",              TOK_QUEUE },
 265         { "divert",             TOK_DIVERT },
 266         { "tee",                TOK_TEE },
 267         { "netgraph",           TOK_NETGRAPH },
 268         { "ngtee",              TOK_NGTEE },
 269         { "fwd",                TOK_FORWARD },
 270         { "forward",            TOK_FORWARD },
 271         { "skipto",             TOK_SKIPTO },
 272         { "deny",               TOK_DENY },
 273         { "drop",               TOK_DENY },
 274         { "reject",             TOK_REJECT },
 275         { "reset6",             TOK_RESET6 },
 276         { "reset",              TOK_RESET },
 277         { "unreach6",           TOK_UNREACH6 },
 278         { "unreach",            TOK_UNREACH },
 279         { "check-state",        TOK_CHECKSTATE },
 280         { "//",                 TOK_COMMENT },
 281         { "nat",                TOK_NAT },
 282         { "reass",              TOK_REASS },
 283         { "setfib",             TOK_SETFIB },
 284         { "setdscp",            TOK_SETDSCP },
 285         { "call",               TOK_CALL },
 286         { "return",             TOK_RETURN },
 287         { "eaction",            TOK_EACTION },
 288         { "tcp-setmss",         TOK_TCPSETMSS },
 289         { "setmark",            TOK_SETMARK },
 290         { NULL, 0 }     /* terminator */
 291 };
 292
 293 static struct _s_x rule_action_params[] = {
 294         { "altq",               TOK_ALTQ },
 295         { "log",                TOK_LOG },
 296         { "tag",                TOK_TAG },
 297         { "untag",              TOK_UNTAG },
 298         { NULL, 0 }     /* terminator */
 299 };
 300
 301 /*
 302  * The 'lookup' instruction accepts one of the following arguments.
 303  * Arguments are passed as v[1] in O_DST_LOOKUP options.
 304  */
 305 static struct _s_x lookup_keys[] = {
 306         { "dst-ip",             LOOKUP_DST_IP },
 307         { "src-ip",             LOOKUP_SRC_IP },
 308         { "dst-port",           LOOKUP_DST_PORT },
 309         { "src-port",           LOOKUP_SRC_PORT },
 310         { "dst-mac",            LOOKUP_DST_MAC },
 311         { "src-mac",            LOOKUP_SRC_MAC },
 312         { "uid",                LOOKUP_UID },
 313         { "jail",               LOOKUP_JAIL },
 314         { "dscp",               LOOKUP_DSCP },
 315         { "mark",               LOOKUP_MARK },
 316         { NULL,                 0 },
 317 };
 318
 319 static struct _s_x rule_options[] = {
 320         { "tagged",             TOK_TAGGED },
 321         { "uid",                TOK_UID },
 322         { "gid",                TOK_GID },
 323         { "jail",               TOK_JAIL },
 324         { "in",                 TOK_IN },
 325         { "limit",              TOK_LIMIT },
 326         { "set-limit",          TOK_SETLIMIT },
 327         { "keep-state",         TOK_KEEPSTATE },
 328         { "record-state",       TOK_RECORDSTATE },
 329         { "bridged",            TOK_LAYER2 },
 330         { "layer2",             TOK_LAYER2 },
 331         { "out",                TOK_OUT },
 332         { "diverted",           TOK_DIVERTED },
 333         { "diverted-loopback",  TOK_DIVERTEDLOOPBACK },
 334         { "diverted-output",    TOK_DIVERTEDOUTPUT },
 335         { "xmit",               TOK_XMIT },
 336         { "recv",               TOK_RECV },
 337         { "via",                TOK_VIA },
 338         { "fragment",           TOK_FRAG },
 339         { "frag",               TOK_FRAG },
 340         { "fib",                TOK_FIB },
 341         { "ipoptions",          TOK_IPOPTS },
 342         { "ipopts",             TOK_IPOPTS },
 343         { "iplen",              TOK_IPLEN },
 344         { "ipid",               TOK_IPID },
 345         { "ipprecedence",       TOK_IPPRECEDENCE },
 346         { "dscp",               TOK_DSCP },
 347         { "iptos",              TOK_IPTOS },
 348         { "ipttl",              TOK_IPTTL },
 349         { "ipversion",          TOK_IPVER },
 350         { "ipver",              TOK_IPVER },
 351         { "estab",              TOK_ESTAB },
 352         { "established",        TOK_ESTAB },
 353         { "setup",              TOK_SETUP },
 354         { "sockarg",            TOK_SOCKARG },
 355         { "tcpdatalen",         TOK_TCPDATALEN },
 356         { "tcpflags",           TOK_TCPFLAGS },
 357         { "tcpflgs",            TOK_TCPFLAGS },
 358         { "tcpmss",             TOK_TCPMSS },
 359         { "tcpoptions",         TOK_TCPOPTS },
 360         { "tcpopts",            TOK_TCPOPTS },
 361         { "tcpseq",             TOK_TCPSEQ },
 362         { "tcpack",             TOK_TCPACK },
 363         { "tcpwin",             TOK_TCPWIN },
 364         { "icmptype",           TOK_ICMPTYPES },
 365         { "icmptypes",          TOK_ICMPTYPES },
 366         { "dst-ip",             TOK_DSTIP },
 367         { "src-ip",             TOK_SRCIP },
 368         { "dst-port",           TOK_DSTPORT },
 369         { "src-port",           TOK_SRCPORT },
 370         { "dst-mac",            TOK_DSTMAC },
 371         { "src-mac",            TOK_SRCMAC },
 372         { "proto",              TOK_PROTO },
 373         { "MAC",                TOK_MAC },
 374         { "mac",                TOK_MAC },
 375         { "mac-type",           TOK_MACTYPE },
 376         { "verrevpath",         TOK_VERREVPATH },
 377         { "versrcreach",        TOK_VERSRCREACH },
 378         { "antispoof",          TOK_ANTISPOOF },
 379         { "ipsec",              TOK_IPSEC },
 380         { "icmp6type",          TOK_ICMP6TYPES },
 381         { "icmp6types",         TOK_ICMP6TYPES },
 382         { "ext6hdr",            TOK_EXT6HDR },
 383         { "flow-id",            TOK_FLOWID },
 384         { "ipv6",               TOK_IPV6 },
 385         { "ip6",                TOK_IPV6 },
 386         { "ipv4",               TOK_IPV4 },
 387         { "ip4",                TOK_IPV4 },
 388         { "dst-ipv6",           TOK_DSTIP6 },
 389         { "dst-ip6",            TOK_DSTIP6 },
 390         { "src-ipv6",           TOK_SRCIP6 },
 391         { "src-ip6",            TOK_SRCIP6 },
 392         { "lookup",             TOK_LOOKUP },
 393         { "flow",               TOK_FLOW },
 394         { "mark",               TOK_MARK },
 395         { "defer-action",       TOK_SKIPACTION },
 396         { "defer-immediate-action",     TOK_SKIPACTION },
 397         { "//",                 TOK_COMMENT },
 398
 399         { "not",                TOK_NOT },              /* pseudo option */
 400         { "!", /* escape ? */   TOK_NOT },              /* pseudo option */
 401         { "or",                 TOK_OR },               /* pseudo option */
 402         { "|", /* escape */     TOK_OR },               /* pseudo option */
 403         { "{",                  TOK_STARTBRACE },       /* pseudo option */
 404         { "(",                  TOK_STARTBRACE },       /* pseudo option */
 405         { "}",                  TOK_ENDBRACE },         /* pseudo option */
 406         { ")",                  TOK_ENDBRACE },         /* pseudo option */
 407         { NULL, 0 }     /* terminator */
 408 };
 409
 410 void bprint_uint_arg(struct buf_pr *bp, const char *str, uint32_t arg);
 411 static int ipfw_get_config(struct cmdline_opts *co, struct format_opts *fo,
 412     ipfw_cfg_lheader **pcfg, size_t *psize);
 413 static int ipfw_show_config(struct cmdline_opts *co, struct format_opts *fo,
 414     ipfw_cfg_lheader *cfg, size_t sz, int ac, char **av);
 415 static void ipfw_list_tifaces(void);
 416
 417 struct tidx;
 418 static uint16_t pack_object(struct tidx *tstate, const char *name, int otype);
 419 static uint16_t pack_table(struct tidx *tstate, const char *name);
 420
 421 static char *table_search_ctlv(ipfw_obj_ctlv *ctlv, uint16_t idx);
 422 static void object_sort_ctlv(ipfw_obj_ctlv *ctlv);
 423 static char *object_search_ctlv(ipfw_obj_ctlv *ctlv, uint16_t idx,
 424     uint16_t type);
 425
 426 int
 427 is_ipfw(void)
 428 {
 429         return (g_co.prog == cmdline_prog_ipfw);
 430 }
 431
 432 /*
 433  * Simple string buffer API.
 434  * Used to simplify buffer passing between function and for
 435  * transparent overrun handling.
 436  */
 437
 438 /*
 439  * Allocates new buffer of given size @sz.
 440  *
 441  * Returns 0 on success.
 442  */
 443 int
 444 bp_alloc(struct buf_pr *b, size_t size)
 445 {
 446         memset(b, 0, sizeof(struct buf_pr));
 447
 448         if ((b->buf = calloc(1, size)) == NULL)
 449                 return (ENOMEM);
 450
 451         b->ptr = b->buf;
 452         b->size = size;
 453         b->avail = b->size;
 454
 455         return (0);
 456 }
 457
 458 void
 459 bp_free(struct buf_pr *b)
 460 {
 461
 462         free(b->buf);
 463 }
 464
 465 /*
 466  * Flushes buffer so new writer start from beginning.
 467  */
 468 void
 469 bp_flush(struct buf_pr *b)
 470 {
 471
 472         b->ptr = b->buf;
 473         b->avail = b->size;
 474         b->buf[0] = '\0';
 475 }
 476
 477 /*
 478  * Print message specified by @format and args.
 479  * Automatically manage buffer space and transparently handle
 480  * buffer overruns.
 481  *
 482  * Returns number of bytes that should have been printed.
 483  */
 484 int
 485 bprintf(struct buf_pr *b, const char *format, ...)
 486 {
 487         va_list args;
 488         int i;
 489
 490         va_start(args, format);
 491
 492         i = vsnprintf(b->ptr, b->avail, format, args);
 493         va_end(args);
 494
 495         if (i < 0 || (size_t)i > b->avail) {
 496                 /* Overflow or print error */
 497                 b->avail = 0;
 498         } else {
 499                 b->ptr += i;
 500                 b->avail -= i;
 501         }
 502
 503         b->needed += i;
 504
 505         return (i);
 506 }
 507
 508 /*
 509  * Special values printer for tablearg-aware opcodes.
 510  */
 511 void
 512 bprint_uint_arg(struct buf_pr *bp, const char *str, uint32_t arg)
 513 {
 514
 515         if (str != NULL)
 516                 bprintf(bp, "%s", str);
 517         if (arg == IP_FW_TARG)
 518                 bprintf(bp, "tablearg");
 519         else
 520                 bprintf(bp, "%u", arg);
 521 }
 522
 523 /*
 524  * Helper routine to print a possibly unaligned uint64_t on
 525  * various platform. If width > 0, print the value with
 526  * the desired width, followed by a space;
 527  * otherwise, return the required width.
 528  */
 529 int
 530 pr_u64(struct buf_pr *b, void *pd, int width)
 531 {
 532 #ifdef TCC
 533 #define U64_FMT "I64"
 534 #else
 535 #define U64_FMT "llu"
 536 #endif
 537         uint64_t u;
 538         unsigned long long d;
 539
 540         bcopy (pd, &u, sizeof(u));
 541         d = u;
 542         return (width > 0) ?
 543                 bprintf(b, "%*" U64_FMT " ", width, d) :
 544                 snprintf(NULL, 0, "%" U64_FMT, d) ;
 545 #undef U64_FMT
 546 }
 547
 548
 549 void *
 550 safe_calloc(size_t number, size_t size)
 551 {
 552         void *ret = calloc(number, size);
 553
 554         if (ret == NULL)
 555                 err(EX_OSERR, "calloc");
 556         return ret;
 557 }
 558
 559 void *
 560 safe_realloc(void *ptr, size_t size)
 561 {
 562         void *ret = realloc(ptr, size);
 563
 564         if (ret == NULL)
 565                 err(EX_OSERR, "realloc");
 566         return ret;
 567 }
 568
 569 /*
 570  * Compare things like interface or table names.
 571  */
 572 int
 573 stringnum_cmp(const char *a, const char *b)
 574 {
 575         int la, lb;
 576
 577         la = strlen(a);
 578         lb = strlen(b);
 579
 580         if (la > lb)
 581                 return (1);
 582         else if (la < lb)
 583                 return (-01);
 584
 585         return (strcmp(a, b));
 586 }
 587
 588 struct debug_header {
 589         uint16_t cmd_type;
 590         uint16_t spare1;
 591         uint32_t opt_name;
 592         uint32_t total_len;
 593         uint32_t spare2;
 594 };
 595
 596 /*
 597  * conditionally runs the command.
 598  * Selected options or negative -> getsockopt
 599  */
 600 int
 601 do_cmd(int optname, void *optval, uintptr_t optlen)
 602 {
 603         int i;
 604
 605         if (g_co.debug_only) {
 606                 struct debug_header dbg = {
 607                         .cmd_type = 1,
 608                         .opt_name = optname,
 609                         .total_len = optlen + sizeof(struct debug_header),
 610                 };
 611                 write(1, &dbg, sizeof(dbg));
 612                 write(1, optval, optlen);
 613         }
 614
 615         if (g_co.test_only)
 616                 return (0);
 617
 618         if (ipfw_socket == -1)
 619                 ipfw_socket = socket(AF_INET, SOCK_RAW, IPPROTO_RAW);
 620         if (ipfw_socket < 0)
 621                 err(EX_UNAVAILABLE, "socket");
 622
 623         if (optname == IP_FW_GET || optname == IP_DUMMYNET_GET ||
 624             optname == IP_FW_ADD || optname == IP_FW3 ||
 625             optname == IP_FW_NAT_GET_CONFIG ||
 626             optname < 0 ||
 627             optname == IP_FW_NAT_GET_LOG) {
 628                 if (optname < 0)
 629                         optname = -optname;
 630                 i = getsockopt(ipfw_socket, IPPROTO_IP, optname, optval,
 631                         (socklen_t *)optlen);
 632         } else {
 633                 i = setsockopt(ipfw_socket, IPPROTO_IP, optname, optval, optlen);
 634         }
 635         return (i);
 636 }
 637
 638 /*
 639  * do_set3 - pass ipfw control cmd to kernel
 640  * @optname: option name
 641  * @optval: pointer to option data
 642  * @optlen: option length
 643  *
 644  * Assumes op3 header is already embedded.
 645  * Calls setsockopt() with IP_FW3 as kernel-visible opcode.
 646  * Returns 0 on success or errno otherwise.
 647  */
 648 int
 649 do_set3(int optname, ip_fw3_opheader *op3, size_t optlen)
 650 {
 651
 652         op3->opcode = optname;
 653
 654         if (g_co.debug_only) {
 655                 struct debug_header dbg = {
 656                         .cmd_type = 2,
 657                         .opt_name = optname,
 658                         .total_len = optlen, sizeof(struct debug_header),
 659                 };
 660                 write(1, &dbg, sizeof(dbg));
 661                 write(1, op3, optlen);
 662         }
 663
 664         if (g_co.test_only)
 665                 return (0);
 666
 667         if (ipfw_socket == -1)
 668                 ipfw_socket = socket(AF_INET, SOCK_RAW, IPPROTO_RAW);
 669         if (ipfw_socket < 0)
 670                 err(EX_UNAVAILABLE, "socket");
 671
 672
 673         return (setsockopt(ipfw_socket, IPPROTO_IP, IP_FW3, op3, optlen));
 674 }
 675
 676 /*
 677  * do_get3 - pass ipfw control cmd to kernel
 678  * @optname: option name
 679  * @optval: pointer to option data
 680  * @optlen: pointer to option length
 681  *
 682  * Assumes op3 header is already embedded.
 683  * Calls getsockopt() with IP_FW3 as kernel-visible opcode.
 684  * Returns 0 on success or errno otherwise.
 685  */
 686 int
 687 do_get3(int optname, ip_fw3_opheader *op3, size_t *optlen)
 688 {
 689         int error;
 690         socklen_t len;
 691
 692         op3->opcode = optname;
 693
 694         if (g_co.debug_only) {
 695                 struct debug_header dbg = {
 696                         .cmd_type = 3,
 697                         .opt_name = optname,
 698                         .total_len = *optlen + sizeof(struct debug_header),
 699                 };
 700                 write(1, &dbg, sizeof(dbg));
 701                 write(1, op3, *optlen);
 702         }
 703
 704         if (g_co.test_only)
 705                 return (0);
 706
 707         if (ipfw_socket == -1)
 708                 ipfw_socket = socket(AF_INET, SOCK_RAW, IPPROTO_RAW);
 709         if (ipfw_socket < 0)
 710                 err(EX_UNAVAILABLE, "socket");
 711
 712
 713         len = *optlen;
 714         error = getsockopt(ipfw_socket, IPPROTO_IP, IP_FW3, op3, &len);
 715         *optlen = len;
 716
 717         return (error);
 718 }
 719
 720 /**
 721  * match_token takes a table and a string, returns the value associated
 722  * with the string (-1 in case of failure).
 723  */
 724 int
 725 match_token(struct _s_x *table, const char *string)
 726 {
 727         struct _s_x *pt;
 728         uint i = strlen(string);
 729
 730         for (pt = table ; i && pt->s != NULL ; pt++)
 731                 if (strlen(pt->s) == i && !bcmp(string, pt->s, i))
 732                         return pt->x;
 733         return (-1);
 734 }
 735
 736 /**
 737  * match_token_relaxed takes a table and a string, returns the value associated
 738  * with the string for the best match.
 739  *
 740  * Returns:
 741  * value from @table for matched records
 742  * -1 for non-matched records
 743  * -2 if more than one records match @string.
 744  */
 745 int
 746 match_token_relaxed(struct _s_x *table, const char *string)
 747 {
 748         struct _s_x *pt, *m;
 749         int i, c;
 750
 751         i = strlen(string);
 752         c = 0;
 753
 754         for (pt = table ; i != 0 && pt->s != NULL ; pt++) {
 755                 if (strncmp(pt->s, string, i) != 0)
 756                         continue;
 757                 m = pt;
 758                 c++;
 759         }
 760
 761         if (c == 1)
 762                 return (m->x);
 763
 764         return (c > 0 ? -2: -1);
 765 }
 766
 767 int
 768 get_token(struct _s_x *table, const char *string, const char *errbase)
 769 {
 770         int tcmd;
 771
 772         if ((tcmd = match_token_relaxed(table, string)) < 0)
 773                 errx(EX_USAGE, "%s %s %s",
 774                     (tcmd == 0) ? "invalid" : "ambiguous", errbase, string);
 775
 776         return (tcmd);
 777 }
 778
 779 /**
 780  * match_value takes a table and a value, returns the string associated
 781  * with the value (NULL in case of failure).
 782  */
 783 char const *
 784 match_value(struct _s_x *p, int value)
 785 {
 786         for (; p->s != NULL; p++)
 787                 if (p->x == value)
 788                         return p->s;
 789         return NULL;
 790 }
 791
 792 size_t
 793 concat_tokens(char *buf, size_t bufsize, struct _s_x *table,
 794     const char *delimiter)
 795 {
 796         struct _s_x *pt;
 797         int l;
 798         size_t sz;
 799
 800         for (sz = 0, pt = table ; pt->s != NULL; pt++) {
 801                 l = snprintf(buf + sz, bufsize - sz, "%s%s",
 802                     (sz == 0) ? "" : delimiter, pt->s);
 803                 sz += l;
 804                 bufsize += l;
 805                 if (sz > bufsize)
 806                         return (bufsize);
 807         }
 808
 809         return (sz);
 810 }
 811
 812 /*
 813  * helper function to process a set of flags and set bits in the
 814  * appropriate masks.
 815  */
 816 int
 817 fill_flags(struct _s_x *flags, char *p, char **e, uint32_t *set,
 818     uint32_t *clear)
 819 {
 820         char *q;        /* points to the separator */
 821         int val;
 822         uint32_t *which;        /* mask we are working on */
 823
 824         while (p && *p) {
 825                 if (*p == '!') {
 826                         p++;
 827                         which = clear;
 828                 } else
 829                         which = set;
 830                 q = strchr(p, ',');
 831                 if (q)
 832                         *q++ = '\0';
 833                 val = match_token(flags, p);
 834                 if (val <= 0) {
 835                         if (e != NULL)
 836                                 *e = p;
 837                         return (-1);
 838                 }
 839                 *which |= (uint32_t)val;
 840                 p = q;
 841         }
 842         return (0);
 843 }
 844
 845 void
 846 print_flags_buffer(char *buf, size_t sz, struct _s_x *list, uint32_t set)
 847 {
 848         char const *comma = "";
 849         int i, l;
 850
 851         for (i = 0; list[i].x != 0; i++) {
 852                 if ((set & list[i].x) == 0)
 853                         continue;
 854
 855                 set &= ~list[i].x;
 856                 l = snprintf(buf, sz, "%s%s", comma, list[i].s);
 857                 if (l < 0 || (size_t)l >= sz)
 858                         return;
 859                 comma = ",";
 860                 buf += l;
 861                 sz -=l;
 862         }
 863 }
 864
 865 /*
 866  * _substrcmp takes two strings and returns 1 if they do not match,
 867  * and 0 if they match exactly or the first string is a sub-string
 868  * of the second.  A warning is printed to stderr in the case that the
 869  * first string is a sub-string of the second.
 870  *
 871  * This function will be removed in the future through the usual
 872  * deprecation process.
 873  */
 874 int
 875 _substrcmp(const char *str1, const char* str2)
 876 {
 877
 878         if (strncmp(str1, str2, strlen(str1)) != 0)
 879                 return 1;
 880
 881         if (strlen(str1) != strlen(str2))
 882                 warnx("DEPRECATED: '%s' matched '%s' as a sub-string",
 883                     str1, str2);
 884         return 0;
 885 }
 886
 887 /*
 888  * _substrcmp2 takes three strings and returns 1 if the first two do not match,
 889  * and 0 if they match exactly or the second string is a sub-string
 890  * of the first.  A warning is printed to stderr in the case that the
 891  * first string does not match the third.
 892  *
 893  * This function exists to warn about the bizarre construction
 894  * strncmp(str, "by", 2) which is used to allow people to use a shortcut
 895  * for "bytes".  The problem is that in addition to accepting "by",
 896  * "byt", "byte", and "bytes", it also excepts "by_rabid_dogs" and any
 897  * other string beginning with "by".
 898  *
 899  * This function will be removed in the future through the usual
 900  * deprecation process.
 901  */
 902 int
 903 _substrcmp2(const char *str1, const char* str2, const char* str3)
 904 {
 905
 906         if (strncmp(str1, str2, strlen(str2)) != 0)
 907                 return 1;
 908
 909         if (strcmp(str1, str3) != 0)
 910                 warnx("DEPRECATED: '%s' matched '%s'",
 911                     str1, str3);
 912         return 0;
 913 }
 914
 915 /*
 916  * prints one port, symbolic or numeric
 917  */
 918 static void
 919 print_port(struct buf_pr *bp, int proto, uint16_t port)
 920 {
 921
 922         if (proto == IPPROTO_ETHERTYPE) {
 923                 char const *s;
 924
 925                 if (g_co.do_resolv && (s = match_value(ether_types, port)) )
 926                         bprintf(bp, "%s", s);
 927                 else
 928                         bprintf(bp, "0x%04x", port);
 929         } else {
 930                 struct servent *se = NULL;
 931                 if (g_co.do_resolv) {
 932                         struct protoent *pe = getprotobynumber(proto);
 933
 934                         se = getservbyport(htons(port), pe ? pe->p_name : NULL);
 935                 }
 936                 if (se)
 937                         bprintf(bp, "%s", se->s_name);
 938                 else
 939                         bprintf(bp, "%d", port);
 940         }
 941 }
 942
 943 static struct _s_x _port_name[] = {
 944         {"dst-port",    O_IP_DSTPORT},
 945         {"src-port",    O_IP_SRCPORT},
 946         {"ipid",        O_IPID},
 947         {"iplen",       O_IPLEN},
 948         {"ipttl",       O_IPTTL},
 949         {"mac-type",    O_MAC_TYPE},
 950         {"tcpdatalen",  O_TCPDATALEN},
 951         {"tcpmss",      O_TCPMSS},
 952         {"tcpwin",      O_TCPWIN},
 953         {"tagged",      O_TAGGED},
 954         {NULL,          0}
 955 };
 956
 957 /*
 958  * Print the values in a list 16-bit items of the types above.
 959  * XXX todo: add support for mask.
 960  */
 961 static void
 962 print_newports(struct buf_pr *bp, const ipfw_insn_u16 *cmd, int proto, int opcode)
 963 {
 964         const uint16_t *p = cmd->ports;
 965         int i;
 966         char const *sep;
 967
 968         if (opcode != 0) {
 969                 sep = match_value(_port_name, opcode);
 970                 if (sep == NULL)
 971                         sep = "???";
 972                 bprintf(bp, " %s", sep);
 973         }
 974         sep = " ";
 975         for (i = F_LEN((const ipfw_insn *)cmd) - 1; i > 0; i--, p += 2) {
 976                 bprintf(bp, "%s", sep);
 977                 print_port(bp, proto, p[0]);
 978                 if (p[0] != p[1]) {
 979                         bprintf(bp, "-");
 980                         print_port(bp, proto, p[1]);
 981                 }
 982                 sep = ",";
 983         }
 984 }
 985
 986 /*
 987  * Like strtol, but also translates service names into port numbers
 988  * for some protocols.
 989  * In particular:
 990  *      proto == -1 disables the protocol check;
 991  *      proto == IPPROTO_ETHERTYPE looks up an internal table
 992  *      proto == <some value in /etc/protocols> matches the values there.
 993  * Returns *end == s in case the parameter is not found.
 994  */
 995 static int
 996 strtoport(char *s, char **end, int base, int proto)
 997 {
 998         char *p, *buf;
 999         char *s1;
1000         int i;
1001
1002         *end = s;               /* default - not found */
1003         if (*s == '\0')
1004                 return 0;       /* not found */
1005
1006         if (isdigit(*s))
1007                 return strtol(s, end, base);
1008
1009         /*
1010          * find separator. '\\' escapes the next char.
1011          */
1012         for (s1 = s; *s1 && (isalnum(*s1) || *s1 == '\\' ||
1013             *s1 == '_' || *s1 == '.') ; s1++)
1014                 if (*s1 == '\\' && s1[1] != '\0')
1015                         s1++;
1016
1017         buf = safe_calloc(s1 - s + 1, 1);
1018
1019         /*
1020          * copy into a buffer skipping backslashes
1021          */
1022         for (p = s, i = 0; p != s1 ; p++)
1023                 if (*p != '\\')
1024                         buf[i++] = *p;
1025         buf[i++] = '\0';
1026
1027         if (proto == IPPROTO_ETHERTYPE) {
1028                 i = match_token(ether_types, buf);
1029                 free(buf);
1030                 if (i != -1) {  /* found */
1031                         *end = s1;
1032                         return i;
1033                 }
1034         } else {
1035                 struct protoent *pe = NULL;
1036                 struct servent *se;
1037
1038                 if (proto != 0)
1039                         pe = getprotobynumber(proto);
1040                 setservent(1);
1041                 se = getservbyname(buf, pe ? pe->p_name : NULL);
1042                 free(buf);
1043                 if (se != NULL) {
1044                         *end = s1;
1045                         return ntohs(se->s_port);
1046                 }
1047         }
1048         return 0;       /* not found */
1049 }
1050
1051 /*
1052  * Fill the body of the command with the list of port ranges.
1053  */
1054 static int
1055 fill_newports(ipfw_insn_u16 *cmd, char *av, int proto, int cblen)
1056 {
1057         uint16_t a, b, *p = cmd->ports;
1058         int i = 0;
1059         char *s = av;
1060
1061         while (*s) {
1062                 a = strtoport(av, &s, 0, proto);
1063                 if (s == av)                    /* empty or invalid argument */
1064                         return (0);
1065
1066                 CHECK_LENGTH(cblen, i + 2);
1067
1068                 switch (*s) {
1069                 case '-':                       /* a range */
1070                         av = s + 1;
1071                         b = strtoport(av, &s, 0, proto);
1072                         /* Reject expressions like '1-abc' or '1-2-3'. */
1073                         if (s == av || (*s != ',' && *s != '\0'))
1074                                 return (0);
1075                         p[0] = a;
1076                         p[1] = b;
1077                         break;
1078                 case ',':                       /* comma separated list */
1079                 case '\0':
1080                         p[0] = p[1] = a;
1081                         break;
1082                 default:
1083                         warnx("port list: invalid separator <%c> in <%s>",
1084                                 *s, av);
1085                         return (0);
1086                 }
1087
1088                 i++;
1089                 p += 2;
1090                 av = s + 1;
1091         }
1092         if (i > 0) {
1093                 if (i + 1 > F_LEN_MASK)
1094                         errx(EX_DATAERR, "too many ports/ranges\n");
1095                 cmd->o.len |= i + 1;    /* leave F_NOT and F_OR untouched */
1096         }
1097         return (i);
1098 }
1099
1100 /*
1101  * Fill the body of the command with the list of DiffServ codepoints.
1102  */
1103 static void
1104 fill_dscp(ipfw_insn *cmd, char *av, int cblen)
1105 {
1106         uint32_t *low, *high;
1107         char *s = av, *a;
1108         int code;
1109
1110         cmd->opcode = O_DSCP;
1111         cmd->len |= F_INSN_SIZE(ipfw_insn_u32) + 1;
1112
1113         CHECK_CMDLEN;
1114
1115         low = (uint32_t *)(cmd + 1);
1116         high = low + 1;
1117
1118         *low = 0;
1119         *high = 0;
1120
1121         while (s != NULL) {
1122                 a = strchr(s, ',');
1123
1124                 if (a != NULL)
1125                         *a++ = '\0';
1126
1127                 if (isalpha(*s)) {
1128                         if ((code = match_token(f_ipdscp, s)) == -1)
1129                                 errx(EX_DATAERR, "Unknown DSCP code");
1130                 } else {
1131                         code = strtoul(s, NULL, 10);
1132                         if (code < 0 || code > 63)
1133                                 errx(EX_DATAERR, "Invalid DSCP value");
1134                 }
1135
1136                 if (code >= 32)
1137                         *high |= 1 << (code - 32);
1138                 else
1139                         *low |= 1 << code;
1140
1141                 s = a;
1142         }
1143 }
1144
1145 /*
1146  * Fill the body of the command with mark value and mask.
1147  */
1148 static void
1149 fill_mark(ipfw_insn *cmd, char *av, int cblen)
1150 {
1151         uint32_t *value, *mask;
1152         char *value_str;
1153
1154         cmd->opcode = O_MARK;
1155         cmd->len |= F_INSN_SIZE(ipfw_insn_u32) + 1;
1156
1157         CHECK_CMDLEN;
1158
1159         value = (uint32_t *)(cmd + 1);
1160         mask = value + 1;
1161
1162         value_str = strsep(&av, ":");
1163
1164         if (strcmp(value_str, "tablearg") == 0) {
1165                 cmd->arg1 = IP_FW_TARG;
1166                 *value = 0;
1167         } else {
1168                 /* This is not a tablearg */
1169                 cmd->arg1 |= 0x8000;
1170                 *value = strtoul(value_str, NULL, 0);
1171         }
1172         if (av)
1173                 *mask = strtoul(av, NULL, 0);
1174         else
1175                 *mask = 0xFFFFFFFF;
1176
1177         if ((*value & *mask) != *value)
1178                 errx(EX_DATAERR, "Static mark value: some bits in value are"
1179                     " set that will be masked out by mask "
1180                     "(%#x & %#x) = %#x != %#x",
1181                     *value, *mask, (*value & *mask), *value);
1182 }
1183
1184 static struct _s_x icmpcodes[] = {
1185       { "net",                  ICMP_UNREACH_NET },
1186       { "host",                 ICMP_UNREACH_HOST },
1187       { "protocol",             ICMP_UNREACH_PROTOCOL },
1188       { "port",                 ICMP_UNREACH_PORT },
1189       { "needfrag",             ICMP_UNREACH_NEEDFRAG },
1190       { "srcfail",              ICMP_UNREACH_SRCFAIL },
1191       { "net-unknown",          ICMP_UNREACH_NET_UNKNOWN },
1192       { "host-unknown",         ICMP_UNREACH_HOST_UNKNOWN },
1193       { "isolated",             ICMP_UNREACH_ISOLATED },
1194       { "net-prohib",           ICMP_UNREACH_NET_PROHIB },
1195       { "host-prohib",          ICMP_UNREACH_HOST_PROHIB },
1196       { "tosnet",               ICMP_UNREACH_TOSNET },
1197       { "toshost",              ICMP_UNREACH_TOSHOST },
1198       { "filter-prohib",        ICMP_UNREACH_FILTER_PROHIB },
1199       { "host-precedence",      ICMP_UNREACH_HOST_PRECEDENCE },
1200       { "precedence-cutoff",    ICMP_UNREACH_PRECEDENCE_CUTOFF },
1201       { NULL, 0 }
1202 };
1203
1204 static uint16_t
1205 get_reject_code(const char *str)
1206 {
1207         int val;
1208         char *s;
1209
1210         val = strtoul(str, &s, 0);
1211         if (s == str || *s != '\0' || val >= 0x100)
1212                 val = match_token(icmpcodes, str);
1213         if (val < 0)
1214                 errx(EX_DATAERR, "unknown ICMP unreachable code ``%s''", str);
1215         return (val);
1216 }
1217
1218 static void
1219 print_reject_code(struct buf_pr *bp, uint16_t code)
1220 {
1221         char const *s;
1222
1223         if ((s = match_value(icmpcodes, code)) != NULL)
1224                 bprintf(bp, "unreach %s", s);
1225         else
1226                 bprintf(bp, "unreach %u", code);
1227 }
1228
1229 /*
1230  * Returns the number of bits set (from left) in a contiguous bitmask,
1231  * or -1 if the mask is not contiguous.
1232  * XXX this needs a proper fix.
1233  * This effectively works on masks in big-endian (network) format.
1234  * when compiled on little endian architectures.
1235  *
1236  * First bit is bit 7 of the first byte -- note, for MAC addresses,
1237  * the first bit on the wire is bit 0 of the first byte.
1238  * len is the max length in bits.
1239  */
1240 int
1241 contigmask(const uint8_t *p, int len)
1242 {
1243         int i, n;
1244
1245         for (i=0; i<len ; i++)
1246                 if ( (p[i/8] & (1 << (7 - (i%8)))) == 0) /* first bit unset */
1247                         break;
1248         for (n=i+1; n < len; n++)
1249                 if ( (p[n/8] & (1 << (7 - (n%8)))) != 0)
1250                         return -1; /* mask not contiguous */
1251         return i;
1252 }
1253
1254 /*
1255  * print flags set/clear in the two bitmasks passed as parameters.
1256  * There is a specialized check for f_tcpflags.
1257  */
1258 static void
1259 print_flags(struct buf_pr *bp, char const *name, const ipfw_insn *cmd,
1260     struct _s_x *list)
1261 {
1262         char const *comma = "";
1263         int i;
1264         uint8_t set = cmd->arg1 & 0xff;
1265         uint8_t clear = (cmd->arg1 >> 8) & 0xff;
1266
1267         if (list == f_tcpflags && set == TH_SYN && clear == TH_ACK) {
1268                 bprintf(bp, " setup");
1269                 return;
1270         }
1271
1272         bprintf(bp, " %s ", name);
1273         for (i=0; list[i].x != 0; i++) {
1274                 if (set & list[i].x) {
1275                         set &= ~list[i].x;
1276                         bprintf(bp, "%s%s", comma, list[i].s);
1277                         comma = ",";
1278                 }
1279                 if (clear & list[i].x) {
1280                         clear &= ~list[i].x;
1281                         bprintf(bp, "%s!%s", comma, list[i].s);
1282                         comma = ",";
1283                 }
1284         }
1285 }
1286
1287
1288 /*
1289  * Print the ip address contained in a command.
1290  */
1291 static void
1292 print_ip(struct buf_pr *bp, const struct format_opts *fo,
1293     const ipfw_insn_ip *cmd)
1294 {
1295         struct hostent *he = NULL;
1296         const struct in_addr *ia;
1297         const uint32_t *a = ((const ipfw_insn_u32 *)cmd)->d;
1298         uint32_t len = F_LEN((const ipfw_insn *)cmd);
1299         char *t;
1300
1301         bprintf(bp, " ");
1302         if (cmd->o.opcode == O_IP_DST_LOOKUP && len > F_INSN_SIZE(ipfw_insn_u32)) {
1303                 const char *arg;
1304
1305                 arg = match_value(lookup_keys, a[1]);
1306                 t = table_search_ctlv(fo->tstate,
1307                     ((const ipfw_insn *)cmd)->arg1);
1308                 bprintf(bp, "lookup %s %s", arg, t);
1309                 return;
1310         }
1311         if (cmd->o.opcode == O_IP_SRC_ME || cmd->o.opcode == O_IP_DST_ME) {
1312                 bprintf(bp, "me");
1313                 return;
1314         }
1315         if (cmd->o.opcode == O_IP_SRC_LOOKUP ||
1316             cmd->o.opcode == O_IP_DST_LOOKUP) {
1317                 t = table_search_ctlv(fo->tstate,
1318                     ((const ipfw_insn *)cmd)->arg1);
1319                 bprintf(bp, "table(%s", t);
1320                 if (len == F_INSN_SIZE(ipfw_insn_u32))
1321                         bprintf(bp, ",%u", *a);
1322                 bprintf(bp, ")");
1323                 return;
1324         }
1325         if (cmd->o.opcode == O_IP_SRC_SET || cmd->o.opcode == O_IP_DST_SET) {
1326                 const uint32_t *map = (const uint32_t *)&cmd->mask;
1327                 struct in_addr addr;
1328                 uint32_t x;
1329                 int i, j;
1330                 char comma = '{';
1331
1332                 x = cmd->o.arg1 - 1;
1333                 x = htonl(~x);
1334                 addr.s_addr = htonl(cmd->addr.s_addr);
1335                 bprintf(bp, "%s/%d", inet_ntoa(addr),
1336                     contigmask((uint8_t *)&x, 32));
1337                 x = cmd->addr.s_addr;
1338                 x &= 0xff; /* base */
1339                 /*
1340                  * Print bits and ranges.
1341                  * Locate first bit set (i), then locate first bit unset (j).
1342                  * If we have 3+ consecutive bits set, then print them as a
1343                  * range, otherwise only print the initial bit and rescan.
1344                  */
1345                 for (i=0; i < cmd->o.arg1; i++)
1346                         if (map[i/32] & (1<<(i & 31))) {
1347                                 for (j=i+1; j < cmd->o.arg1; j++)
1348                                         if (!(map[ j/32] & (1<<(j & 31))))
1349                                                 break;
1350                                 bprintf(bp, "%c%d", comma, i+x);
1351                                 if (j>i+2) { /* range has at least 3 elements */
1352                                         bprintf(bp, "-%d", j-1+x);
1353                                         i = j-1;
1354                                 }
1355                                 comma = ',';
1356                         }
1357                 bprintf(bp, "}");
1358                 return;
1359         }
1360         /*
1361          * len == 2 indicates a single IP, whereas lists of 1 or more
1362          * addr/mask pairs have len = (2n+1). We convert len to n so we
1363          * use that to count the number of entries.
1364          */
1365     for (len = len / 2; len > 0; len--, a += 2) {
1366         int mb =        /* mask length */
1367             (cmd->o.opcode == O_IP_SRC || cmd->o.opcode == O_IP_DST) ?
1368                 32 : contigmask((const uint8_t *)&(a[1]), 32);
1369         if (mb == 32 && g_co.do_resolv)
1370                 he = gethostbyaddr((const char *)&(a[0]), sizeof(in_addr_t),
1371                     AF_INET);
1372         if (he != NULL)         /* resolved to name */
1373                 bprintf(bp, "%s", he->h_name);
1374         else if (mb == 0)       /* any */
1375                 bprintf(bp, "any");
1376         else {          /* numeric IP followed by some kind of mask */
1377                 ia = (const struct in_addr *)&a[0];
1378                 bprintf(bp, "%s", inet_ntoa(*ia));
1379                 if (mb < 0) {
1380                         ia = (const struct in_addr *)&a[1];
1381                         bprintf(bp, ":%s", inet_ntoa(*ia));
1382                 } else if (mb < 32)
1383                         bprintf(bp, "/%d", mb);
1384         }
1385         if (len > 1)
1386                 bprintf(bp, ",");
1387     }
1388 }
1389
1390 /*
1391  * prints a MAC address/mask pair
1392  */
1393 static void
1394 format_mac(struct buf_pr *bp, const uint8_t *addr, const uint8_t *mask)
1395 {
1396         int l = contigmask(mask, 48);
1397
1398         if (l == 0)
1399                 bprintf(bp, " any");
1400         else {
1401                 bprintf(bp, " %02x:%02x:%02x:%02x:%02x:%02x",
1402                     addr[0], addr[1], addr[2], addr[3], addr[4], addr[5]);
1403                 if (l == -1)
1404                         bprintf(bp, "&%02x:%02x:%02x:%02x:%02x:%02x",
1405                             mask[0], mask[1], mask[2],
1406                             mask[3], mask[4], mask[5]);
1407                 else if (l < 48)
1408                         bprintf(bp, "/%d", l);
1409         }
1410 }
1411
1412 static void
1413 print_mac(struct buf_pr *bp, const ipfw_insn_mac *mac)
1414 {
1415
1416         bprintf(bp, " MAC");
1417         format_mac(bp, mac->addr, mac->mask);
1418         format_mac(bp, mac->addr + 6, mac->mask + 6);
1419 }
1420
1421 static void
1422 print_mac_lookup(struct buf_pr *bp, const struct format_opts *fo,
1423     const ipfw_insn *cmd)
1424 {
1425         uint32_t len = F_LEN(cmd);
1426         char *t;
1427
1428         bprintf(bp, " ");
1429
1430         t = table_search_ctlv(fo->tstate, cmd->arg1);
1431         bprintf(bp, "table(%s", t);
1432         if (len == F_INSN_SIZE(ipfw_insn_u32))
1433                 bprintf(bp, ",%u", ((const ipfw_insn_u32 *)cmd)->d[0]);
1434         bprintf(bp, ")");
1435 }
1436
1437 static void
1438 fill_icmptypes(ipfw_insn_u32 *cmd, char *av)
1439 {
1440         uint8_t type;
1441
1442         cmd->d[0] = 0;
1443         while (*av) {
1444                 if (*av == ',')
1445                         av++;
1446
1447                 type = strtoul(av, &av, 0);
1448
1449                 if (*av != ',' && *av != '\0')
1450                         errx(EX_DATAERR, "invalid ICMP type");
1451
1452                 if (type > 31)
1453                         errx(EX_DATAERR, "ICMP type out of range");
1454
1455                 cmd->d[0] |= 1 << type;
1456         }
1457         cmd->o.opcode = O_ICMPTYPE;
1458         cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32);
1459 }
1460
1461 static void
1462 print_icmptypes(struct buf_pr *bp, const ipfw_insn_u32 *cmd)
1463 {
1464         int i;
1465         char sep= ' ';
1466
1467         bprintf(bp, " icmptypes");
1468         for (i = 0; i < 32; i++) {
1469                 if ( (cmd->d[0] & (1 << (i))) == 0)
1470                         continue;
1471                 bprintf(bp, "%c%d", sep, i);
1472                 sep = ',';
1473         }
1474 }
1475
1476 static void
1477 print_dscp(struct buf_pr *bp, const ipfw_insn_u32 *cmd)
1478 {
1479         const uint32_t *v;
1480         const char *code;
1481         int i = 0;
1482         char sep= ' ';
1483
1484         bprintf(bp, " dscp");
1485         v = cmd->d;
1486         while (i < 64) {
1487                 if (*v & (1 << i)) {
1488                         if ((code = match_value(f_ipdscp, i)) != NULL)
1489                                 bprintf(bp, "%c%s", sep, code);
1490                         else
1491                                 bprintf(bp, "%c%d", sep, i);
1492                         sep = ',';
1493                 }
1494
1495                 if ((++i % 32) == 0)
1496                         v++;
1497         }
1498 }
1499
1500 #define insntod(cmd, type)      ((const ipfw_insn_ ## type *)(cmd))
1501 struct show_state {
1502         struct ip_fw_rule       *rule;
1503         const ipfw_insn         *eaction;
1504         uint8_t                 *printed;
1505         int                     flags;
1506 #define HAVE_PROTO              0x0001
1507 #define HAVE_SRCIP              0x0002
1508 #define HAVE_DSTIP              0x0004
1509 #define HAVE_PROBE_STATE        0x0008
1510         int                     proto;
1511         int                     or_block;
1512 };
1513
1514 static int
1515 init_show_state(struct show_state *state, struct ip_fw_rule *rule)
1516 {
1517
1518         state->printed = calloc(rule->cmd_len, sizeof(uint8_t));
1519         if (state->printed == NULL)
1520                 return (ENOMEM);
1521         state->rule = rule;
1522         state->eaction = NULL;
1523         state->flags = 0;
1524         state->proto = 0;
1525         state->or_block = 0;
1526         return (0);
1527 }
1528
1529 static void
1530 free_show_state(struct show_state *state)
1531 {
1532
1533         free(state->printed);
1534 }
1535
1536 static uint8_t
1537 is_printed_opcode(struct show_state *state, const ipfw_insn *cmd)
1538 {
1539
1540         return (state->printed[cmd - state->rule->cmd]);
1541 }
1542
1543 static void
1544 mark_printed(struct show_state *state, const ipfw_insn *cmd)
1545 {
1546
1547         state->printed[cmd - state->rule->cmd] = 1;
1548 }
1549
1550 static void
1551 print_limit_mask(struct buf_pr *bp, const ipfw_insn_limit *limit)
1552 {
1553         struct _s_x *p = limit_masks;
1554         char const *comma = " ";
1555         uint8_t x;
1556
1557         for (x = limit->limit_mask; p->x != 0; p++) {
1558                 if ((x & p->x) == p->x) {
1559                         x &= ~p->x;
1560                         bprintf(bp, "%s%s", comma, p->s);
1561                         comma = ",";
1562                 }
1563         }
1564         bprint_uint_arg(bp, " ", limit->conn_limit);
1565 }
1566
1567 static int
1568 print_instruction(struct buf_pr *bp, const struct format_opts *fo,
1569     struct show_state *state, const ipfw_insn *cmd)
1570 {
1571         struct protoent *pe;
1572         struct passwd *pwd;
1573         struct group *grp;
1574         const char *s;
1575         double d;
1576
1577         if (is_printed_opcode(state, cmd))
1578                 return (0);
1579         if ((cmd->len & F_OR) != 0 && state->or_block == 0)
1580                 bprintf(bp, " {");
1581         if (cmd->opcode != O_IN && (cmd->len & F_NOT) != 0)
1582                 bprintf(bp, " not");
1583
1584         switch (cmd->opcode) {
1585         case O_PROB:
1586                 d = 1.0 * insntod(cmd, u32)->d[0] / 0x7fffffff;
1587                 bprintf(bp, "prob %f ", d);
1588                 break;
1589         case O_PROBE_STATE: /* no need to print anything here */
1590                 state->flags |= HAVE_PROBE_STATE;
1591                 break;
1592         case O_IP_SRC:
1593         case O_IP_SRC_LOOKUP:
1594         case O_IP_SRC_MASK:
1595         case O_IP_SRC_ME:
1596         case O_IP_SRC_SET:
1597                 if (state->flags & HAVE_SRCIP)
1598                         bprintf(bp, " src-ip");
1599                 print_ip(bp, fo, insntod(cmd, ip));
1600                 break;
1601         case O_IP_DST:
1602         case O_IP_DST_LOOKUP:
1603         case O_IP_DST_MASK:
1604         case O_IP_DST_ME:
1605         case O_IP_DST_SET:
1606                 if (state->flags & HAVE_DSTIP)
1607                         bprintf(bp, " dst-ip");
1608                 print_ip(bp, fo, insntod(cmd, ip));
1609                 break;
1610         case O_IP6_SRC:
1611         case O_IP6_SRC_MASK:
1612         case O_IP6_SRC_ME:
1613                 if (state->flags & HAVE_SRCIP)
1614                         bprintf(bp, " src-ip6");
1615                 print_ip6(bp, insntod(cmd, ip6));
1616                 break;
1617         case O_IP6_DST:
1618         case O_IP6_DST_MASK:
1619         case O_IP6_DST_ME:
1620                 if (state->flags & HAVE_DSTIP)
1621                         bprintf(bp, " dst-ip6");
1622                 print_ip6(bp, insntod(cmd, ip6));
1623                 break;
1624         case O_MAC_SRC_LOOKUP:
1625                 bprintf(bp, " src-mac");
1626                 print_mac_lookup(bp, fo, cmd);
1627                 break;
1628         case O_MAC_DST_LOOKUP:
1629                 bprintf(bp, " dst-mac");
1630                 print_mac_lookup(bp, fo, cmd);
1631                 break;
1632         case O_FLOW6ID:
1633                 print_flow6id(bp, insntod(cmd, u32));
1634                 break;
1635         case O_IP_DSTPORT:
1636         case O_IP_SRCPORT:
1637                 print_newports(bp, insntod(cmd, u16), state->proto,
1638                     (state->flags & (HAVE_SRCIP | HAVE_DSTIP)) ==
1639                     (HAVE_SRCIP | HAVE_DSTIP) ?  cmd->opcode: 0);
1640                 break;
1641         case O_PROTO:
1642                 pe = getprotobynumber(cmd->arg1);
1643                 if (state->flags & HAVE_PROTO)
1644                         bprintf(bp, " proto");
1645                 if (pe != NULL)
1646                         bprintf(bp, " %s", pe->p_name);
1647                 else
1648                         bprintf(bp, " %u", cmd->arg1);
1649                 state->proto = cmd->arg1;
1650                 break;
1651         case O_MACADDR2:
1652                 print_mac(bp, insntod(cmd, mac));
1653                 break;
1654         case O_MAC_TYPE:
1655                 print_newports(bp, insntod(cmd, u16),
1656                     IPPROTO_ETHERTYPE, cmd->opcode);
1657                 break;
1658         case O_FRAG:
1659                 print_flags(bp, "frag", cmd, f_ipoff);
1660                 break;
1661         case O_FIB:
1662                 bprintf(bp, " fib %u", cmd->arg1);
1663                 break;
1664         case O_SOCKARG:
1665                 bprintf(bp, " sockarg");
1666                 break;
1667         case O_IN:
1668                 bprintf(bp, cmd->len & F_NOT ? " out" : " in");
1669                 break;
1670         case O_DIVERTED:
1671                 switch (cmd->arg1) {
1672                 case 3:
1673                         bprintf(bp, " diverted");
1674                         break;
1675                 case 2:
1676                         bprintf(bp, " diverted-output");
1677                         break;
1678                 case 1:
1679                         bprintf(bp, " diverted-loopback");
1680                         break;
1681                 default:
1682                         bprintf(bp, " diverted-?<%u>", cmd->arg1);
1683                         break;
1684                 }
1685                 break;
1686         case O_LAYER2:
1687                 bprintf(bp, " layer2");
1688                 break;
1689         case O_XMIT:
1690         case O_RECV:
1691         case O_VIA:
1692                 if (cmd->opcode == O_XMIT)
1693                         s = "xmit";
1694                 else if (cmd->opcode == O_RECV)
1695                         s = "recv";
1696                 else /* if (cmd->opcode == O_VIA) */
1697                         s = "via";
1698                 switch (insntod(cmd, if)->name[0]) {
1699                 case '\0':
1700                         bprintf(bp, " %s %s", s,
1701                             inet_ntoa(insntod(cmd, if)->p.ip));
1702                         break;
1703                 case '\1':
1704                         bprintf(bp, " %s table(%s)", s,
1705                             table_search_ctlv(fo->tstate,
1706                             insntod(cmd, if)->p.kidx));
1707                         break;
1708                 default:
1709                         bprintf(bp, " %s %s", s,
1710                             insntod(cmd, if)->name);
1711                 }
1712                 break;
1713         case O_IP_FLOW_LOOKUP:
1714                 s = table_search_ctlv(fo->tstate, cmd->arg1);
1715                 bprintf(bp, " flow table(%s", s);
1716                 if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_u32))
1717                         bprintf(bp, ",%u", insntod(cmd, u32)->d[0]);
1718                 bprintf(bp, ")");
1719                 break;
1720         case O_IPID:
1721         case O_IPTTL:
1722         case O_IPLEN:
1723         case O_TCPDATALEN:
1724         case O_TCPMSS:
1725         case O_TCPWIN:
1726                 if (F_LEN(cmd) == 1) {
1727                         switch (cmd->opcode) {
1728                         case O_IPID:
1729                                 s = "ipid";
1730                                 break;
1731                         case O_IPTTL:
1732                                 s = "ipttl";
1733                                 break;
1734                         case O_IPLEN:
1735                                 s = "iplen";
1736                                 break;
1737                         case O_TCPDATALEN:
1738                                 s = "tcpdatalen";
1739                                 break;
1740                         case O_TCPMSS:
1741                                 s = "tcpmss";
1742                                 break;
1743                         case O_TCPWIN:
1744                                 s = "tcpwin";
1745                                 break;
1746                         default:
1747                                 s = "<unknown>";
1748                                 break;
1749                         }
1750                         bprintf(bp, " %s %u", s, cmd->arg1);
1751                 } else
1752                         print_newports(bp, insntod(cmd, u16), 0,
1753                             cmd->opcode);
1754                 break;
1755         case O_IPVER:
1756                 bprintf(bp, " ipver %u", cmd->arg1);
1757                 break;
1758         case O_IPPRECEDENCE:
1759                 bprintf(bp, " ipprecedence %u", cmd->arg1 >> 5);
1760                 break;
1761         case O_DSCP:
1762                 print_dscp(bp, insntod(cmd, u32));
1763                 break;
1764         case O_IPOPT:
1765                 print_flags(bp, "ipoptions", cmd, f_ipopts);
1766                 break;
1767         case O_IPTOS:
1768                 print_flags(bp, "iptos", cmd, f_iptos);
1769                 break;
1770         case O_ICMPTYPE:
1771                 print_icmptypes(bp, insntod(cmd, u32));
1772                 break;
1773         case O_ESTAB:
1774                 bprintf(bp, " established");
1775                 break;
1776         case O_TCPFLAGS:
1777                 print_flags(bp, "tcpflags", cmd, f_tcpflags);
1778                 break;
1779         case O_TCPOPTS:
1780                 print_flags(bp, "tcpoptions", cmd, f_tcpopts);
1781                 break;
1782         case O_TCPACK:
1783                 bprintf(bp, " tcpack %d",
1784                     ntohl(insntod(cmd, u32)->d[0]));
1785                 break;
1786         case O_TCPSEQ:
1787                 bprintf(bp, " tcpseq %d",
1788                     ntohl(insntod(cmd, u32)->d[0]));
1789                 break;
1790         case O_UID:
1791                 pwd = getpwuid(insntod(cmd, u32)->d[0]);
1792                 if (pwd != NULL)
1793                         bprintf(bp, " uid %s", pwd->pw_name);
1794                 else
1795                         bprintf(bp, " uid %u",
1796                             insntod(cmd, u32)->d[0]);
1797                 break;
1798         case O_GID:
1799                 grp = getgrgid(insntod(cmd, u32)->d[0]);
1800                 if (grp != NULL)
1801                         bprintf(bp, " gid %s", grp->gr_name);
1802                 else
1803                         bprintf(bp, " gid %u",
1804                             insntod(cmd, u32)->d[0]);
1805                 break;
1806         case O_JAIL:
1807                 bprintf(bp, " jail %d", insntod(cmd, u32)->d[0]);
1808                 break;
1809         case O_VERREVPATH:
1810                 bprintf(bp, " verrevpath");
1811                 break;
1812         case O_VERSRCREACH:
1813                 bprintf(bp, " versrcreach");
1814                 break;
1815         case O_ANTISPOOF:
1816                 bprintf(bp, " antispoof");
1817                 break;
1818         case O_IPSEC:
1819                 bprintf(bp, " ipsec");
1820                 break;
1821         case O_NOP:
1822                 bprintf(bp, " // %s", (const char *)(cmd + 1));
1823                 break;
1824         case O_KEEP_STATE:
1825                 if (state->flags & HAVE_PROBE_STATE)
1826                         bprintf(bp, " keep-state");
1827                 else
1828                         bprintf(bp, " record-state");
1829                 bprintf(bp, " :%s",
1830                     object_search_ctlv(fo->tstate, cmd->arg1,
1831                     IPFW_TLV_STATE_NAME));
1832                 break;
1833         case O_LIMIT:
1834                 if (state->flags & HAVE_PROBE_STATE)
1835                         bprintf(bp, " limit");
1836                 else
1837                         bprintf(bp, " set-limit");
1838                 print_limit_mask(bp, insntod(cmd, limit));
1839                 bprintf(bp, " :%s",
1840                     object_search_ctlv(fo->tstate, cmd->arg1,
1841                     IPFW_TLV_STATE_NAME));
1842                 break;
1843         case O_IP6:
1844                 if (state->flags & HAVE_PROTO)
1845                         bprintf(bp, " proto");
1846                 bprintf(bp, " ip6");
1847                 break;
1848         case O_IP4:
1849                 if (state->flags & HAVE_PROTO)
1850                         bprintf(bp, " proto");
1851                 bprintf(bp, " ip4");
1852                 break;
1853         case O_ICMP6TYPE:
1854                 print_icmp6types(bp, insntod(cmd, u32));
1855                 break;
1856         case O_EXT_HDR:
1857                 print_ext6hdr(bp, cmd);
1858                 break;
1859         case O_TAGGED:
1860                 if (F_LEN(cmd) == 1)
1861                         bprint_uint_arg(bp, " tagged ", cmd->arg1);
1862                 else
1863                         print_newports(bp, insntod(cmd, u16),
1864                                     0, O_TAGGED);
1865                 break;
1866         case O_SKIP_ACTION:
1867                 bprintf(bp, " defer-immediate-action");
1868                 break;
1869         case O_MARK:
1870                 bprintf(bp, " mark");
1871                 if (cmd->arg1 == IP_FW_TARG)
1872                         bprintf(bp, " tablearg");
1873                 else
1874                         bprintf(bp, " %#x",
1875                             ((const ipfw_insn_u32 *)cmd)->d[0]);
1876
1877                 if (((const ipfw_insn_u32 *)cmd)->d[1] != 0xFFFFFFFF)
1878                         bprintf(bp, ":%#x",
1879                             ((const ipfw_insn_u32 *)cmd)->d[1]);
1880                 break;
1881
1882         default:
1883                 bprintf(bp, " [opcode %d len %d]", cmd->opcode,
1884                     cmd->len);
1885         }
1886         if (cmd->len & F_OR) {
1887                 bprintf(bp, " or");
1888                 state->or_block = 1;
1889         } else if (state->or_block != 0) {
1890                 bprintf(bp, " }");
1891                 state->or_block = 0;
1892         }
1893         mark_printed(state, cmd);
1894
1895         return (1);
1896 }
1897
1898 static ipfw_insn *
1899 print_opcode(struct buf_pr *bp, struct format_opts *fo,
1900     struct show_state *state, int opcode)
1901 {
1902         ipfw_insn *cmd;
1903         int l;
1904
1905         for (l = state->rule->act_ofs, cmd = state->rule->cmd;
1906             l > 0; l -= F_LEN(cmd), cmd += F_LEN(cmd)) {
1907                 /* We use zero opcode to print the rest of options */
1908                 if (opcode >= 0 && cmd->opcode != opcode)
1909                         continue;
1910                 /*
1911                  * Skip O_NOP, when we printing the rest
1912                  * of options, it will be handled separately.
1913                  */
1914                 if (cmd->opcode == O_NOP && opcode != O_NOP)
1915                         continue;
1916                 if (!print_instruction(bp, fo, state, cmd))
1917                         continue;
1918                 return (cmd);
1919         }
1920         return (NULL);
1921 }
1922
1923 static void
1924 print_fwd(struct buf_pr *bp, const ipfw_insn *cmd)
1925 {
1926         char buf[INET6_ADDRSTRLEN + IF_NAMESIZE + 2];
1927         const ipfw_insn_sa6 *sa6;
1928         const ipfw_insn_sa *sa;
1929         uint16_t port;
1930
1931         if (cmd->opcode == O_FORWARD_IP) {
1932                 sa = insntod(cmd, sa);
1933                 port = sa->sa.sin_port;
1934                 if (sa->sa.sin_addr.s_addr == INADDR_ANY)
1935                         bprintf(bp, "fwd tablearg");
1936                 else
1937                         bprintf(bp, "fwd %s", inet_ntoa(sa->sa.sin_addr));
1938         } else {
1939                 sa6 = insntod(cmd, sa6);
1940                 port = sa6->sa.sin6_port;
1941                 bprintf(bp, "fwd ");
1942                 if (getnameinfo((const struct sockaddr *)&sa6->sa,
1943                     sizeof(struct sockaddr_in6), buf, sizeof(buf), NULL, 0,
1944                     NI_NUMERICHOST) == 0)
1945                         bprintf(bp, "%s", buf);
1946         }
1947         if (port != 0)
1948                 bprintf(bp, ",%u", port);
1949 }
1950
1951 static int
1952 print_action_instruction(struct buf_pr *bp, const struct format_opts *fo,
1953     struct show_state *state, const ipfw_insn *cmd)
1954 {
1955         const char *s;
1956
1957         if (is_printed_opcode(state, cmd))
1958                 return (0);
1959         switch (cmd->opcode) {
1960         case O_CHECK_STATE:
1961                 bprintf(bp, "check-state");
1962                 if (cmd->arg1 != 0)
1963                         s = object_search_ctlv(fo->tstate, cmd->arg1,
1964                             IPFW_TLV_STATE_NAME);
1965                 else
1966                         s = NULL;
1967                 bprintf(bp, " :%s", s ? s: "any");
1968                 break;
1969         case O_ACCEPT:
1970                 bprintf(bp, "allow");
1971                 break;
1972         case O_COUNT:
1973                 bprintf(bp, "count");
1974                 break;
1975         case O_DENY:
1976                 bprintf(bp, "deny");
1977                 break;
1978         case O_REJECT:
1979                 if (cmd->arg1 == ICMP_REJECT_RST)
1980                         bprintf(bp, "reset");
1981                 else if (cmd->arg1 == ICMP_REJECT_ABORT)
1982                         bprintf(bp, "abort");
1983                 else if (cmd->arg1 == ICMP_UNREACH_HOST)
1984                         bprintf(bp, "reject");
1985                 else if (cmd->arg1 == ICMP_UNREACH_NEEDFRAG &&
1986                     cmd->len == F_INSN_SIZE(ipfw_insn_u16))
1987                         bprintf(bp, "needfrag %u",
1988                             ((const ipfw_insn_u16 *)cmd)->ports[0]);
1989                 else
1990                         print_reject_code(bp, cmd->arg1);
1991                 break;
1992         case O_UNREACH6:
1993                 if (cmd->arg1 == ICMP6_UNREACH_RST)
1994                         bprintf(bp, "reset6");
1995                 else if (cmd->arg1 == ICMP6_UNREACH_ABORT)
1996                         bprintf(bp, "abort6");
1997                 else
1998                         print_unreach6_code(bp, cmd->arg1);
1999                 break;
2000         case O_SKIPTO:
2001                 bprint_uint_arg(bp, "skipto ", cmd->arg1);
2002                 break;
2003         case O_PIPE:
2004                 bprint_uint_arg(bp, "pipe ", cmd->arg1);
2005                 break;
2006         case O_QUEUE:
2007                 bprint_uint_arg(bp, "queue ", cmd->arg1);
2008                 break;
2009         case O_DIVERT:
2010                 bprint_uint_arg(bp, "divert ", cmd->arg1);
2011                 break;
2012         case O_TEE:
2013                 bprint_uint_arg(bp, "tee ", cmd->arg1);
2014                 break;
2015         case O_NETGRAPH:
2016                 bprint_uint_arg(bp, "netgraph ", cmd->arg1);
2017                 break;
2018         case O_NGTEE:
2019                 bprint_uint_arg(bp, "ngtee ", cmd->arg1);
2020                 break;
2021         case O_FORWARD_IP:
2022         case O_FORWARD_IP6:
2023                 print_fwd(bp, cmd);
2024                 break;
2025         case O_LOG:
2026                 if (insntod(cmd, log)->max_log > 0)
2027                         bprintf(bp, " log logamount %d",
2028                             insntod(cmd, log)->max_log);
2029                 else
2030                         bprintf(bp, " log");
2031                 break;
2032         case O_ALTQ:
2033 #ifndef NO_ALTQ
2034                 print_altq_cmd(bp, insntod(cmd, altq));
2035 #endif
2036                 break;
2037         case O_TAG:
2038                 bprint_uint_arg(bp, cmd->len & F_NOT ? " untag ":
2039                     " tag ", cmd->arg1);
2040                 break;
2041         case O_NAT:
2042                 if (cmd->arg1 != IP_FW_NAT44_GLOBAL)
2043                         bprint_uint_arg(bp, "nat ", cmd->arg1);
2044                 else
2045                         bprintf(bp, "nat global");
2046                 break;
2047         case O_SETFIB:
2048                 if (cmd->arg1 == IP_FW_TARG)
2049                         bprint_uint_arg(bp, "setfib ", cmd->arg1);
2050                 else
2051                         bprintf(bp, "setfib %u", cmd->arg1 & 0x7FFF);
2052                 break;
2053         case O_EXTERNAL_ACTION:
2054                 /*
2055                  * The external action can consists of two following
2056                  * each other opcodes - O_EXTERNAL_ACTION and
2057                  * O_EXTERNAL_INSTANCE. The first contains the ID of
2058                  * name of external action. The second contains the ID
2059                  * of name of external action instance.
2060                  * NOTE: in case when external action has no named
2061                  * instances support, the second opcode isn't needed.
2062                  */
2063                 state->eaction = cmd;
2064                 s = object_search_ctlv(fo->tstate, cmd->arg1,
2065                     IPFW_TLV_EACTION);
2066                 if (match_token(rule_eactions, s) != -1)
2067                         bprintf(bp, "%s", s);
2068                 else
2069                         bprintf(bp, "eaction %s", s);
2070                 break;
2071         case O_EXTERNAL_INSTANCE:
2072                 if (state->eaction == NULL)
2073                         break;
2074                 /*
2075                  * XXX: we need to teach ipfw(9) to rewrite opcodes
2076                  * in the user buffer on rule addition. When we add
2077                  * the rule, we specify zero TLV type for
2078                  * O_EXTERNAL_INSTANCE object. To show correct
2079                  * rule after `ipfw add` we need to search instance
2080                  * name with zero type. But when we do `ipfw show`
2081                  * we calculate TLV type using IPFW_TLV_EACTION_NAME()
2082                  * macro.
2083                  */
2084                 s = object_search_ctlv(fo->tstate, cmd->arg1, 0);
2085                 if (s == NULL)
2086                         s = object_search_ctlv(fo->tstate,
2087                             cmd->arg1, IPFW_TLV_EACTION_NAME(
2088                             state->eaction->arg1));
2089                 bprintf(bp, " %s", s);
2090                 break;
2091         case O_EXTERNAL_DATA:
2092                 if (state->eaction == NULL)
2093                         break;
2094                 /*
2095                  * Currently we support data formatting only for
2096                  * external data with datalen u16. For unknown data
2097                  * print its size in bytes.
2098                  */
2099                 if (cmd->len == F_INSN_SIZE(ipfw_insn))
2100                         bprintf(bp, " %u", cmd->arg1);
2101                 else
2102                         bprintf(bp, " %ubytes",
2103                             cmd->len * sizeof(uint32_t));
2104                 break;
2105         case O_SETDSCP:
2106                 if (cmd->arg1 == IP_FW_TARG) {
2107                         bprintf(bp, "setdscp tablearg");
2108                         break;
2109                 }
2110                 s = match_value(f_ipdscp, cmd->arg1 & 0x3F);
2111                 if (s != NULL)
2112                         bprintf(bp, "setdscp %s", s);
2113                 else
2114                         bprintf(bp, "setdscp %u", cmd->arg1 & 0x3F);
2115                 break;
2116         case O_REASS:
2117                 bprintf(bp, "reass");
2118                 break;
2119         case O_CALLRETURN:
2120                 if (cmd->len & F_NOT)
2121                         bprintf(bp, "return");
2122                 else
2123                         bprint_uint_arg(bp, "call ", cmd->arg1);
2124                 break;
2125         case O_SETMARK:
2126                 if (cmd->arg1 == IP_FW_TARG) {
2127                         bprintf(bp, "setmark tablearg");
2128                         break;
2129                 }
2130                 bprintf(bp, "setmark %#x", ((const ipfw_insn_u32 *)cmd)->d[0]);
2131                 break;
2132         default:
2133                 bprintf(bp, "** unrecognized action %d len %d ",
2134                         cmd->opcode, cmd->len);
2135         }
2136         mark_printed(state, cmd);
2137
2138         return (1);
2139 }
2140
2141
2142 static ipfw_insn *
2143 print_action(struct buf_pr *bp, struct format_opts *fo,
2144     struct show_state *state, uint8_t opcode)
2145 {
2146         ipfw_insn *cmd;
2147         int l;
2148
2149         for (l = state->rule->cmd_len - state->rule->act_ofs,
2150             cmd = ACTION_PTR(state->rule); l > 0;
2151             l -= F_LEN(cmd), cmd += F_LEN(cmd)) {
2152                 if (cmd->opcode != opcode)
2153                         continue;
2154                 if (!print_action_instruction(bp, fo, state, cmd))
2155                         continue;
2156                 return (cmd);
2157         }
2158         return (NULL);
2159 }
2160
2161 static void
2162 print_proto(struct buf_pr *bp, struct format_opts *fo,
2163     struct show_state *state)
2164 {
2165         ipfw_insn *cmd;
2166         int l, proto, ip4, ip6;
2167
2168         /* Count all O_PROTO, O_IP4, O_IP6 instructions. */
2169         proto = ip4 = ip6 = 0;
2170         for (l = state->rule->act_ofs, cmd = state->rule->cmd;
2171             l > 0; l -= F_LEN(cmd), cmd += F_LEN(cmd)) {
2172                 switch (cmd->opcode) {
2173                 case O_PROTO:
2174                         proto++;
2175                         break;
2176                 case O_IP4:
2177                         ip4 = 1;
2178                         if (cmd->len & F_OR)
2179                                 ip4++;
2180                         break;
2181                 case O_IP6:
2182                         ip6 = 1;
2183                         if (cmd->len & F_OR)
2184                                 ip6++;
2185                         break;
2186                 default:
2187                         continue;
2188                 }
2189         }
2190         if (proto == 0 && ip4 == 0 && ip6 == 0) {
2191                 state->proto = IPPROTO_IP;
2192                 state->flags |= HAVE_PROTO;
2193                 bprintf(bp, " ip");
2194                 return;
2195         }
2196         /* To handle the case { ip4 or ip6 }, print opcode with F_OR first */
2197         cmd = NULL;
2198         if (ip4 || ip6)
2199                 cmd = print_opcode(bp, fo, state, ip4 > ip6 ? O_IP4: O_IP6);
2200         if (cmd != NULL && (cmd->len & F_OR))
2201                 cmd = print_opcode(bp, fo, state, ip4 > ip6 ? O_IP6: O_IP4);
2202         if (cmd == NULL || (cmd->len & F_OR))
2203                 for (l = proto; l > 0; l--) {
2204                         cmd = print_opcode(bp, fo, state, O_PROTO);
2205                         if (cmd == NULL || (cmd->len & F_OR) == 0)
2206                                 break;
2207                 }
2208         /* Initialize proto, it is used by print_newports() */
2209         state->flags |= HAVE_PROTO;
2210         if (state->proto == 0 && ip6 != 0)
2211                 state->proto = IPPROTO_IPV6;
2212 }
2213
2214 static int
2215 match_opcode(int opcode, const int opcodes[], size_t nops)
2216 {
2217         size_t i;
2218
2219         for (i = 0; i < nops; i++)
2220                 if (opcode == opcodes[i])
2221                         return (1);
2222         return (0);
2223 }
2224
2225 static void
2226 print_address(struct buf_pr *bp, struct format_opts *fo,
2227     struct show_state *state, const int opcodes[], size_t nops, int portop,
2228     int flag)
2229 {
2230         ipfw_insn *cmd;
2231         int count, l, portcnt, pf;
2232
2233         count = portcnt = 0;
2234         for (l = state->rule->act_ofs, cmd = state->rule->cmd;
2235             l > 0; l -= F_LEN(cmd), cmd += F_LEN(cmd)) {
2236                 if (match_opcode(cmd->opcode, opcodes, nops))
2237                         count++;
2238                 else if (cmd->opcode == portop)
2239                         portcnt++;
2240         }
2241         if (count == 0)
2242                 bprintf(bp, " any");
2243         for (l = state->rule->act_ofs, cmd = state->rule->cmd;
2244             l > 0 && count > 0; l -= F_LEN(cmd), cmd += F_LEN(cmd)) {
2245                 if (!match_opcode(cmd->opcode, opcodes, nops))
2246                         continue;
2247                 print_instruction(bp, fo, state, cmd);
2248                 if ((cmd->len & F_OR) == 0)
2249                         break;
2250                 count--;
2251         }
2252         /*
2253          * If several O_IP_?PORT opcodes specified, leave them to the
2254          * options section.
2255          */
2256         if (portcnt == 1) {
2257                 for (l = state->rule->act_ofs, cmd = state->rule->cmd, pf = 0;
2258                     l > 0; l -= F_LEN(cmd), cmd += F_LEN(cmd)) {
2259                         if (cmd->opcode != portop) {
2260                                 pf = (cmd->len & F_OR);
2261                                 continue;
2262                         }
2263                         /* Print opcode iff it is not in OR block. */
2264                         if (pf == 0 && (cmd->len & F_OR) == 0)
2265                                 print_instruction(bp, fo, state, cmd);
2266                         break;
2267                 }
2268         }
2269         state->flags |= flag;
2270 }
2271
2272 static const int action_opcodes[] = {
2273         O_CHECK_STATE, O_ACCEPT, O_COUNT, O_DENY, O_REJECT,
2274         O_UNREACH6, O_SKIPTO, O_PIPE, O_QUEUE, O_DIVERT, O_TEE,
2275         O_NETGRAPH, O_NGTEE, O_FORWARD_IP, O_FORWARD_IP6, O_NAT,
2276         O_SETFIB, O_SETDSCP, O_REASS, O_CALLRETURN, O_SETMARK,
2277         /* keep the following opcodes at the end of the list */
2278         O_EXTERNAL_ACTION, O_EXTERNAL_INSTANCE, O_EXTERNAL_DATA
2279 };
2280
2281 static const int modifier_opcodes[] = {
2282         O_LOG, O_ALTQ, O_TAG
2283 };
2284
2285 static const int src_opcodes[] = {
2286         O_IP_SRC, O_IP_SRC_LOOKUP, O_IP_SRC_MASK, O_IP_SRC_ME,
2287         O_IP_SRC_SET, O_IP6_SRC, O_IP6_SRC_MASK, O_IP6_SRC_ME
2288 };
2289
2290 static const int dst_opcodes[] = {
2291         O_IP_DST, O_IP_DST_LOOKUP, O_IP_DST_MASK, O_IP_DST_ME,
2292         O_IP_DST_SET, O_IP6_DST, O_IP6_DST_MASK, O_IP6_DST_ME
2293 };
2294
2295 static void
2296 show_static_rule(struct cmdline_opts *co, struct format_opts *fo,
2297     struct buf_pr *bp, struct ip_fw_rule *rule, struct ip_fw_bcounter *cntr)
2298 {
2299         static int twidth = 0;
2300         struct show_state state;
2301         ipfw_insn *cmd;
2302         size_t i;
2303
2304         /* Print # DISABLED or skip the rule */
2305         if ((fo->set_mask & (1 << rule->set)) == 0) {
2306                 /* disabled mask */
2307                 if (!co->show_sets)
2308                         return;
2309                 else
2310                         bprintf(bp, "# DISABLED ");
2311         }
2312         if (init_show_state(&state, rule) != 0) {
2313                 warn("init_show_state() failed");
2314                 return;
2315         }
2316         bprintf(bp, "%05u ", rule->rulenum);
2317
2318         /* only if counters are available */
2319         if (cntr != NULL) {
2320                 /* Print counters if enabled */
2321                 if (fo->pcwidth > 0 || fo->bcwidth > 0) {
2322                         pr_u64(bp, &cntr->pcnt, fo->pcwidth);
2323                         pr_u64(bp, &cntr->bcnt, fo->bcwidth);
2324                 }
2325
2326                 /* Print timestamp */
2327                 if (co->do_time == TIMESTAMP_NUMERIC)
2328                         bprintf(bp, "%10u ", cntr->timestamp);
2329                 else if (co->do_time == TIMESTAMP_STRING) {
2330                         char timestr[30];
2331                         time_t t = (time_t)0;
2332
2333                         if (twidth == 0) {
2334                                 strcpy(timestr, ctime(&t));
2335                                 *strchr(timestr, '\n') = '\0';
2336                                 twidth = strlen(timestr);
2337                         }
2338                         if (cntr->timestamp > 0) {
2339                                 t = _long_to_time(cntr->timestamp);
2340
2341                                 strcpy(timestr, ctime(&t));
2342                                 *strchr(timestr, '\n') = '\0';
2343                                 bprintf(bp, "%s ", timestr);
2344                         } else {
2345                                 bprintf(bp, "%*s ", twidth, "");
2346                         }
2347                 }
2348         }
2349
2350         /* Print set number */
2351         if (co->show_sets)
2352                 bprintf(bp, "set %d ", rule->set);
2353
2354         /* Print the optional "match probability" */
2355         cmd = print_opcode(bp, fo, &state, O_PROB);
2356         /* Print rule action */
2357         for (i = 0; i < nitems(action_opcodes); i++) {
2358                 cmd = print_action(bp, fo, &state, action_opcodes[i]);
2359                 if (cmd == NULL)
2360                         continue;
2361                 /* Handle special cases */
2362                 switch (cmd->opcode) {
2363                 case O_CHECK_STATE:
2364                         goto end;
2365                 case O_EXTERNAL_ACTION:
2366                 case O_EXTERNAL_INSTANCE:
2367                         /* External action can have several instructions */
2368                         continue;
2369                 }
2370                 break;
2371         }
2372         /* Print rule modifiers */
2373         for (i = 0; i < nitems(modifier_opcodes); i++)
2374                 print_action(bp, fo, &state, modifier_opcodes[i]);
2375         /*
2376          * Print rule body
2377          */
2378         if (co->comment_only != 0)
2379                 goto end;
2380
2381         if (rule->flags & IPFW_RULE_JUSTOPTS) {
2382                 state.flags |= HAVE_PROTO | HAVE_SRCIP | HAVE_DSTIP;
2383                 goto justopts;
2384         }
2385
2386         print_proto(bp, fo, &state);
2387         if (co->do_compact != 0 && (rule->flags & IPFW_RULE_NOOPT))
2388                 goto justopts;
2389
2390         /* Print source */
2391         bprintf(bp, " from");
2392         print_address(bp, fo, &state, src_opcodes, nitems(src_opcodes),
2393             O_IP_SRCPORT, HAVE_SRCIP);
2394
2395         /* Print destination */
2396         bprintf(bp, " to");
2397         print_address(bp, fo, &state, dst_opcodes, nitems(dst_opcodes),
2398             O_IP_DSTPORT, HAVE_DSTIP);
2399
2400 justopts:
2401         /* Print the rest of options */
2402         while (print_opcode(bp, fo, &state, -1))
2403                 ;
2404 end:
2405         /* Print comment at the end */
2406         cmd = print_opcode(bp, fo, &state, O_NOP);
2407         if (co->comment_only != 0 && cmd == NULL)
2408                 bprintf(bp, " // ...");
2409         bprintf(bp, "\n");
2410         free_show_state(&state);
2411 }
2412
2413 static void
2414 show_dyn_state(struct cmdline_opts *co, struct format_opts *fo,
2415     struct buf_pr *bp, ipfw_dyn_rule *d)
2416 {
2417         struct protoent *pe;
2418         struct in_addr a;
2419         uint16_t rulenum;
2420         char buf[INET6_ADDRSTRLEN];
2421
2422         if (d->expire == 0 && d->dyn_type != O_LIMIT_PARENT)
2423                 return;
2424
2425         bcopy(&d->rule, &rulenum, sizeof(rulenum));
2426         bprintf(bp, "%05d", rulenum);
2427         if (fo->pcwidth > 0 || fo->bcwidth > 0) {
2428                 bprintf(bp, " ");
2429                 pr_u64(bp, &d->pcnt, fo->pcwidth);
2430                 pr_u64(bp, &d->bcnt, fo->bcwidth);
2431                 bprintf(bp, "(%ds)", d->expire);
2432         }
2433         switch (d->dyn_type) {
2434         case O_LIMIT_PARENT:
2435                 bprintf(bp, " PARENT %d", d->count);
2436                 break;
2437         case O_LIMIT:
2438                 bprintf(bp, " LIMIT");
2439                 break;
2440         case O_KEEP_STATE: /* bidir, no mask */
2441                 bprintf(bp, " STATE");
2442                 break;
2443         }
2444
2445         if ((pe = getprotobynumber(d->id.proto)) != NULL)
2446                 bprintf(bp, " %s", pe->p_name);
2447         else
2448                 bprintf(bp, " proto %u", d->id.proto);
2449
2450         if (d->id.addr_type == 4) {
2451                 a.s_addr = htonl(d->id.src_ip);
2452                 bprintf(bp, " %s %d", inet_ntoa(a), d->id.src_port);
2453
2454                 a.s_addr = htonl(d->id.dst_ip);
2455                 bprintf(bp, " <-> %s %d", inet_ntoa(a), d->id.dst_port);
2456         } else if (d->id.addr_type == 6) {
2457                 bprintf(bp, " %s %d", inet_ntop(AF_INET6, &d->id.src_ip6, buf,
2458                     sizeof(buf)), d->id.src_port);
2459                 bprintf(bp, " <-> %s %d", inet_ntop(AF_INET6, &d->id.dst_ip6,
2460                     buf, sizeof(buf)), d->id.dst_port);
2461         } else
2462                 bprintf(bp, " UNKNOWN <-> UNKNOWN");
2463         if (d->kidx != 0)
2464                 bprintf(bp, " :%s", object_search_ctlv(fo->tstate,
2465                     d->kidx, IPFW_TLV_STATE_NAME));
2466
2467 #define BOTH_SYN        (TH_SYN | (TH_SYN << 8))
2468 #define BOTH_FIN        (TH_FIN | (TH_FIN << 8))
2469         if (co->verbose) {
2470                 bprintf(bp, " state 0x%08x%s", d->state,
2471                     d->state ? " ": ",");
2472                 if (d->state & IPFW_DYN_ORPHANED)
2473                         bprintf(bp, "ORPHANED,");
2474                 if ((d->state & BOTH_SYN) == BOTH_SYN)
2475                         bprintf(bp, "BOTH_SYN,");
2476                 else {
2477                         if (d->state & TH_SYN)
2478                                 bprintf(bp, "F_SYN,");
2479                         if (d->state & (TH_SYN << 8))
2480                                 bprintf(bp, "R_SYN,");
2481                 }
2482                 if ((d->state & BOTH_FIN) == BOTH_FIN)
2483                         bprintf(bp, "BOTH_FIN,");
2484                 else {
2485                         if (d->state & TH_FIN)
2486                                 bprintf(bp, "F_FIN,");
2487                         if (d->state & (TH_FIN << 8))
2488                                 bprintf(bp, "R_FIN,");
2489                 }
2490                 bprintf(bp, " f_ack 0x%x, r_ack 0x%x", d->ack_fwd,
2491                     d->ack_rev);
2492         }
2493 }
2494
2495 static int
2496 do_range_cmd(int cmd, ipfw_range_tlv *rt)
2497 {
2498         ipfw_range_header rh;
2499         size_t sz;
2500
2501         memset(&rh, 0, sizeof(rh));
2502         memcpy(&rh.range, rt, sizeof(*rt));
2503         rh.range.head.length = sizeof(*rt);
2504         rh.range.head.type = IPFW_TLV_RANGE;
2505         sz = sizeof(rh);
2506
2507         if (do_get3(cmd, &rh.opheader, &sz) != 0)
2508                 return (-1);
2509         /* Save number of matched objects */
2510         rt->new_set = rh.range.new_set;
2511         return (0);
2512 }
2513
2514 /*
2515  * This one handles all set-related commands
2516  *      ipfw set { show | enable | disable }
2517  *      ipfw set swap X Y
2518  *      ipfw set move X to Y
2519  *      ipfw set move rule X to Y
2520  */
2521 void
2522 ipfw_sets_handler(char *av[])
2523 {
2524         ipfw_range_tlv rt;
2525         const char *msg;
2526         size_t size;
2527         uint32_t masks[2];
2528         int i;
2529         uint16_t rulenum;
2530         uint8_t cmd;
2531
2532         av++;
2533         memset(&rt, 0, sizeof(rt));
2534
2535         if (av[0] == NULL)
2536                 errx(EX_USAGE, "set needs command");
2537         if (_substrcmp(*av, "show") == 0) {
2538                 struct format_opts fo;
2539                 ipfw_cfg_lheader *cfg;
2540
2541                 memset(&fo, 0, sizeof(fo));
2542                 if (ipfw_get_config(&g_co, &fo, &cfg, &size) != 0)
2543                         err(EX_OSERR, "requesting config failed");
2544
2545                 for (i = 0, msg = "disable"; i < RESVD_SET; i++)
2546                         if ((cfg->set_mask & (1<<i)) == 0) {
2547                                 printf("%s %d", msg, i);
2548                                 msg = "";
2549                         }
2550                 msg = (cfg->set_mask != (uint32_t)-1) ? " enable" : "enable";
2551                 for (i = 0; i < RESVD_SET; i++)
2552                         if ((cfg->set_mask & (1<<i)) != 0) {
2553                                 printf("%s %d", msg, i);
2554                                 msg = "";
2555                         }
2556                 printf("\n");
2557                 free(cfg);
2558         } else if (_substrcmp(*av, "swap") == 0) {
2559                 av++;
2560                 if ( av[0] == NULL || av[1] == NULL )
2561                         errx(EX_USAGE, "set swap needs 2 set numbers\n");
2562                 rt.set = atoi(av[0]);
2563                 rt.new_set = atoi(av[1]);
2564                 if (!isdigit(*(av[0])) || rt.set > RESVD_SET)
2565                         errx(EX_DATAERR, "invalid set number %s\n", av[0]);
2566                 if (!isdigit(*(av[1])) || rt.new_set > RESVD_SET)
2567                         errx(EX_DATAERR, "invalid set number %s\n", av[1]);
2568                 i = do_range_cmd(IP_FW_SET_SWAP, &rt);
2569         } else if (_substrcmp(*av, "move") == 0) {
2570                 av++;
2571                 if (av[0] && _substrcmp(*av, "rule") == 0) {
2572                         rt.flags = IPFW_RCFLAG_RANGE; /* move rules to new set */
2573                         cmd = IP_FW_XMOVE;
2574                         av++;
2575                 } else
2576                         cmd = IP_FW_SET_MOVE; /* Move set to new one */
2577                 if (av[0] == NULL || av[1] == NULL || av[2] == NULL ||
2578                                 av[3] != NULL ||  _substrcmp(av[1], "to") != 0)
2579                         errx(EX_USAGE, "syntax: set move [rule] X to Y\n");
2580                 rulenum = atoi(av[0]);
2581                 rt.new_set = atoi(av[2]);
2582                 if (cmd == IP_FW_XMOVE) {
2583                         rt.start_rule = rulenum;
2584                         rt.end_rule = rulenum;
2585                 } else
2586                         rt.set = rulenum;
2587                 rt.new_set = atoi(av[2]);
2588                 if (!isdigit(*(av[0])) || (cmd == 3 && rt.set > RESVD_SET) ||
2589                         (cmd == 2 && rt.start_rule == IPFW_DEFAULT_RULE) )
2590                         errx(EX_DATAERR, "invalid source number %s\n", av[0]);
2591                 if (!isdigit(*(av[2])) || rt.new_set > RESVD_SET)
2592                         errx(EX_DATAERR, "invalid dest. set %s\n", av[1]);
2593                 i = do_range_cmd(cmd, &rt);
2594                 if (i < 0)
2595                         err(EX_OSERR, "failed to move %s",
2596                             cmd == IP_FW_SET_MOVE ? "set": "rule");
2597         } else if (_substrcmp(*av, "disable") == 0 ||
2598                    _substrcmp(*av, "enable") == 0 ) {
2599                 int which = _substrcmp(*av, "enable") == 0 ? 1 : 0;
2600
2601                 av++;
2602                 masks[0] = masks[1] = 0;
2603
2604                 while (av[0]) {
2605                         if (isdigit(**av)) {
2606                                 i = atoi(*av);
2607                                 if (i < 0 || i > RESVD_SET)
2608                                         errx(EX_DATAERR,
2609                                             "invalid set number %d\n", i);
2610                                 masks[which] |= (1<<i);
2611                         } else if (_substrcmp(*av, "disable") == 0)
2612                                 which = 0;
2613                         else if (_substrcmp(*av, "enable") == 0)
2614                                 which = 1;
2615                         else
2616                                 errx(EX_DATAERR,
2617                                         "invalid set command %s\n", *av);
2618                         av++;
2619                 }
2620                 if ( (masks[0] & masks[1]) != 0 )
2621                         errx(EX_DATAERR,
2622                             "cannot enable and disable the same set\n");
2623
2624                 rt.set = masks[0];
2625                 rt.new_set = masks[1];
2626                 i = do_range_cmd(IP_FW_SET_ENABLE, &rt);
2627                 if (i)
2628                         warn("set enable/disable: setsockopt(IP_FW_SET_ENABLE)");
2629         } else
2630                 errx(EX_USAGE, "invalid set command %s\n", *av);
2631 }
2632
2633 void
2634 ipfw_sysctl_handler(char *av[], int which)
2635 {
2636         av++;
2637
2638         if (av[0] == NULL) {
2639                 warnx("missing keyword to enable/disable\n");
2640         } else if (_substrcmp(*av, "firewall") == 0) {
2641                 sysctlbyname("net.inet.ip.fw.enable", NULL, 0,
2642                     &which, sizeof(which));
2643                 sysctlbyname("net.inet6.ip6.fw.enable", NULL, 0,
2644                     &which, sizeof(which));
2645         } else if (_substrcmp(*av, "one_pass") == 0) {
2646                 sysctlbyname("net.inet.ip.fw.one_pass", NULL, 0,
2647                     &which, sizeof(which));
2648         } else if (_substrcmp(*av, "debug") == 0) {
2649                 sysctlbyname("net.inet.ip.fw.debug", NULL, 0,
2650                     &which, sizeof(which));
2651         } else if (_substrcmp(*av, "verbose") == 0) {
2652                 sysctlbyname("net.inet.ip.fw.verbose", NULL, 0,
2653                     &which, sizeof(which));
2654         } else if (_substrcmp(*av, "dyn_keepalive") == 0) {
2655                 sysctlbyname("net.inet.ip.fw.dyn_keepalive", NULL, 0,
2656                     &which, sizeof(which));
2657 #ifndef NO_ALTQ
2658         } else if (_substrcmp(*av, "altq") == 0) {
2659                 altq_set_enabled(which);
2660 #endif
2661         } else {
2662                 warnx("unrecognize enable/disable keyword: %s\n", *av);
2663         }
2664 }
2665
2666 typedef void state_cb(struct cmdline_opts *co, struct format_opts *fo,
2667     void *arg, void *state);
2668
2669 static void
2670 prepare_format_dyn(struct cmdline_opts *co, struct format_opts *fo,
2671     void *arg __unused, void *_state)
2672 {
2673         ipfw_dyn_rule *d;
2674         int width;
2675         uint8_t set;
2676
2677         d = (ipfw_dyn_rule *)_state;
2678         /* Count _ALL_ states */
2679         fo->dcnt++;
2680
2681         if (fo->show_counters == 0)
2682                 return;
2683
2684         if (co->use_set) {
2685                 /* skip states from another set */
2686                 bcopy((char *)&d->rule + sizeof(uint16_t), &set,
2687                     sizeof(uint8_t));
2688                 if (set != co->use_set - 1)
2689                         return;
2690         }
2691
2692         width = pr_u64(NULL, &d->pcnt, 0);
2693         if (width > fo->pcwidth)
2694                 fo->pcwidth = width;
2695
2696         width = pr_u64(NULL, &d->bcnt, 0);
2697         if (width > fo->bcwidth)
2698                 fo->bcwidth = width;
2699 }
2700
2701 static int
2702 foreach_state(struct cmdline_opts *co, struct format_opts *fo,
2703     caddr_t base, size_t sz, state_cb dyn_bc, void *dyn_arg)
2704 {
2705         int ttype;
2706         state_cb *fptr;
2707         void *farg;
2708         ipfw_obj_tlv *tlv;
2709         ipfw_obj_ctlv *ctlv;
2710
2711         fptr = NULL;
2712         ttype = 0;
2713
2714         while (sz > 0) {
2715                 ctlv = (ipfw_obj_ctlv *)base;
2716                 switch (ctlv->head.type) {
2717                 case IPFW_TLV_DYNSTATE_LIST:
2718                         base += sizeof(*ctlv);
2719                         sz -= sizeof(*ctlv);
2720                         ttype = IPFW_TLV_DYN_ENT;
2721                         fptr = dyn_bc;
2722                         farg = dyn_arg;
2723                         break;
2724                 default:
2725                         return (sz);
2726                 }
2727
2728                 while (sz > 0) {
2729                         tlv = (ipfw_obj_tlv *)base;
2730                         if (tlv->type != ttype)
2731                                 break;
2732
2733                         fptr(co, fo, farg, tlv + 1);
2734                         sz -= tlv->length;
2735                         base += tlv->length;
2736                 }
2737         }
2738
2739         return (sz);
2740 }
2741
2742 static void
2743 prepare_format_opts(struct cmdline_opts *co, struct format_opts *fo,
2744     ipfw_obj_tlv *rtlv, int rcnt, caddr_t dynbase, size_t dynsz)
2745 {
2746         int bcwidth, pcwidth, width;
2747         int n;
2748         struct ip_fw_bcounter *cntr;
2749         struct ip_fw_rule *r;
2750
2751         bcwidth = 0;
2752         pcwidth = 0;
2753         if (fo->show_counters != 0) {
2754                 for (n = 0; n < rcnt; n++,
2755                     rtlv = (ipfw_obj_tlv *)((caddr_t)rtlv + rtlv->length)) {
2756                         cntr = (struct ip_fw_bcounter *)(rtlv + 1);
2757                         r = (struct ip_fw_rule *)((caddr_t)cntr + cntr->size);
2758                         /* skip rules from another set */
2759                         if (co->use_set && r->set != co->use_set - 1)
2760                                 continue;
2761
2762                         /* packet counter */
2763                         width = pr_u64(NULL, &cntr->pcnt, 0);
2764                         if (width > pcwidth)
2765                                 pcwidth = width;
2766
2767                         /* byte counter */
2768                         width = pr_u64(NULL, &cntr->bcnt, 0);
2769                         if (width > bcwidth)
2770                                 bcwidth = width;
2771                 }
2772         }
2773         fo->bcwidth = bcwidth;
2774         fo->pcwidth = pcwidth;
2775
2776         fo->dcnt = 0;
2777         if (co->do_dynamic && dynsz > 0)
2778                 foreach_state(co, fo, dynbase, dynsz, prepare_format_dyn, NULL);
2779 }
2780
2781 static int
2782 list_static_range(struct cmdline_opts *co, struct format_opts *fo,
2783     struct buf_pr *bp, ipfw_obj_tlv *rtlv, int rcnt)
2784 {
2785         int n, seen;
2786         struct ip_fw_rule *r;
2787         struct ip_fw_bcounter *cntr;
2788
2789         for (n = seen = 0; n < rcnt; n++,
2790             rtlv = (ipfw_obj_tlv *)((caddr_t)rtlv + rtlv->length)) {
2791
2792                 if ((fo->show_counters | fo->show_time) != 0) {
2793                         cntr = (struct ip_fw_bcounter *)(rtlv + 1);
2794                         r = (struct ip_fw_rule *)((caddr_t)cntr + cntr->size);
2795                 } else {
2796                         cntr = NULL;
2797                         r = (struct ip_fw_rule *)(rtlv + 1);
2798                 }
2799                 if (r->rulenum > fo->last)
2800                         break;
2801                 if (co->use_set && r->set != co->use_set - 1)
2802                         continue;
2803                 if (r->rulenum >= fo->first && r->rulenum <= fo->last) {
2804                         show_static_rule(co, fo, bp, r, cntr);
2805                         printf("%s", bp->buf);
2806                         bp_flush(bp);
2807                         seen++;
2808                 }
2809         }
2810
2811         return (seen);
2812 }
2813
2814 static void
2815 list_dyn_state(struct cmdline_opts *co, struct format_opts *fo,
2816     void *_arg, void *_state)
2817 {
2818         uint16_t rulenum;
2819         uint8_t set;
2820         ipfw_dyn_rule *d;
2821         struct buf_pr *bp;
2822
2823         d = (ipfw_dyn_rule *)_state;
2824         bp = (struct buf_pr *)_arg;
2825
2826         bcopy(&d->rule, &rulenum, sizeof(rulenum));
2827         if (rulenum > fo->last)
2828                 return;
2829         if (co->use_set) {
2830                 bcopy((char *)&d->rule + sizeof(uint16_t),
2831                       &set, sizeof(uint8_t));
2832                 if (set != co->use_set - 1)
2833                         return;
2834         }
2835         if (rulenum >= fo->first) {
2836                 show_dyn_state(co, fo, bp, d);
2837                 printf("%s\n", bp->buf);
2838                 bp_flush(bp);
2839         }
2840 }
2841
2842 static int
2843 list_dyn_range(struct cmdline_opts *co, struct format_opts *fo,
2844     struct buf_pr *bp, caddr_t base, size_t sz)
2845 {
2846
2847         sz = foreach_state(co, fo, base, sz, list_dyn_state, bp);
2848         return (sz);
2849 }
2850
2851 void
2852 ipfw_list(int ac, char *av[], int show_counters)
2853 {
2854         ipfw_cfg_lheader *cfg;
2855         struct format_opts sfo;
2856         size_t sz;
2857         int error;
2858         int lac;
2859         char **lav;
2860         uint32_t rnum;
2861         char *endptr;
2862
2863         if (g_co.test_only) {
2864                 fprintf(stderr, "Testing only, list disabled\n");
2865                 return;
2866         }
2867         if (g_co.do_pipe) {
2868                 dummynet_list(ac, av, show_counters);
2869                 return;
2870         }
2871
2872         ac--;
2873         av++;
2874         memset(&sfo, 0, sizeof(sfo));
2875
2876         /* Determine rule range to request */
2877         if (ac > 0) {
2878                 for (lac = ac, lav = av; lac != 0; lac--) {
2879                         rnum = strtoul(*lav++, &endptr, 10);
2880                         if (sfo.first == 0 || rnum < sfo.first)
2881                                 sfo.first = rnum;
2882
2883                         if (*endptr == '-')
2884                                 rnum = strtoul(endptr + 1, &endptr, 10);
2885                         if (sfo.last == 0 || rnum > sfo.last)
2886                                 sfo.last = rnum;
2887                 }
2888         }
2889
2890         /* get configuration from kernel */
2891         cfg = NULL;
2892         sfo.show_counters = show_counters;
2893         sfo.show_time = g_co.do_time;
2894         if (g_co.do_dynamic != 2)
2895                 sfo.flags |= IPFW_CFG_GET_STATIC;
2896         if (g_co.do_dynamic != 0)
2897                 sfo.flags |= IPFW_CFG_GET_STATES;
2898         if ((sfo.show_counters | sfo.show_time) != 0)
2899                 sfo.flags |= IPFW_CFG_GET_COUNTERS;
2900         if (ipfw_get_config(&g_co, &sfo, &cfg, &sz) != 0)
2901                 err(EX_OSERR, "retrieving config failed");
2902
2903         error = ipfw_show_config(&g_co, &sfo, cfg, sz, ac, av);
2904
2905         free(cfg);
2906
2907         if (error != EX_OK)
2908                 exit(error);
2909 }
2910
2911 static int
2912 ipfw_show_config(struct cmdline_opts *co, struct format_opts *fo,
2913     ipfw_cfg_lheader *cfg, size_t sz, int ac, char *av[])
2914 {
2915         caddr_t dynbase;
2916         size_t dynsz;
2917         int rcnt;
2918         int exitval = EX_OK;
2919         int lac;
2920         char **lav;
2921         char *endptr;
2922         size_t readsz;
2923         struct buf_pr bp;
2924         ipfw_obj_ctlv *ctlv;
2925         ipfw_obj_tlv *rbase;
2926
2927         /*
2928          * Handle tablenames TLV first, if any
2929          */
2930         rbase = NULL;
2931         dynbase = NULL;
2932         dynsz = 0;
2933         readsz = sizeof(*cfg);
2934         rcnt = 0;
2935
2936         fo->set_mask = cfg->set_mask;
2937
2938         ctlv = (ipfw_obj_ctlv *)(cfg + 1);
2939         if (ctlv->head.type == IPFW_TLV_TBLNAME_LIST) {
2940                 object_sort_ctlv(ctlv);
2941                 fo->tstate = ctlv;
2942                 readsz += ctlv->head.length;
2943                 ctlv = (ipfw_obj_ctlv *)((caddr_t)ctlv + ctlv->head.length);
2944         }
2945
2946         if (cfg->flags & IPFW_CFG_GET_STATIC) {
2947                 /* We've requested static rules */
2948                 if (ctlv->head.type == IPFW_TLV_RULE_LIST) {
2949                         rbase = (ipfw_obj_tlv *)(ctlv + 1);
2950                         rcnt = ctlv->count;
2951                         readsz += ctlv->head.length;
2952                         ctlv = (ipfw_obj_ctlv *)((caddr_t)ctlv +
2953                             ctlv->head.length);
2954                 }
2955         }
2956
2957         if ((cfg->flags & IPFW_CFG_GET_STATES) && (readsz != sz))  {
2958                 /* We may have some dynamic states */
2959                 dynsz = sz - readsz;
2960                 /* Skip empty header */
2961                 if (dynsz != sizeof(ipfw_obj_ctlv))
2962                         dynbase = (caddr_t)ctlv;
2963                 else
2964                         dynsz = 0;
2965         }
2966
2967         prepare_format_opts(co, fo, rbase, rcnt, dynbase, dynsz);
2968         bp_alloc(&bp, 4096);
2969
2970         /* if no rule numbers were specified, list all rules */
2971         if (ac == 0) {
2972                 fo->first = 0;
2973                 fo->last = IPFW_DEFAULT_RULE;
2974                 if (cfg->flags & IPFW_CFG_GET_STATIC)
2975                         list_static_range(co, fo, &bp, rbase, rcnt);
2976
2977                 if (co->do_dynamic && dynsz > 0) {
2978                         printf("## Dynamic rules (%d %zu):\n", fo->dcnt,
2979                             dynsz);
2980                         list_dyn_range(co, fo, &bp, dynbase, dynsz);
2981                 }
2982
2983                 bp_free(&bp);
2984                 return (EX_OK);
2985         }
2986
2987         /* display specific rules requested on command line */
2988         for (lac = ac, lav = av; lac != 0; lac--) {
2989                 /* convert command line rule # */
2990                 fo->last = fo->first = strtoul(*lav++, &endptr, 10);
2991                 if (*endptr == '-')
2992                         fo->last = strtoul(endptr + 1, &endptr, 10);
2993                 if (*endptr) {
2994                         exitval = EX_USAGE;
2995                         warnx("invalid rule number: %s", *(lav - 1));
2996                         continue;
2997                 }
2998
2999                 if ((cfg->flags & IPFW_CFG_GET_STATIC) == 0)
3000                         continue;
3001
3002                 if (list_static_range(co, fo, &bp, rbase, rcnt) == 0) {
3003                         /* give precedence to other error(s) */
3004                         if (exitval == EX_OK)
3005                                 exitval = EX_UNAVAILABLE;
3006                         if (fo->first == fo->last)
3007                                 warnx("rule %u does not exist", fo->first);
3008                         else
3009                                 warnx("no rules in range %u-%u",
3010                                     fo->first, fo->last);
3011                 }
3012         }
3013
3014         if (co->do_dynamic && dynsz > 0) {
3015                 printf("## Dynamic rules:\n");
3016                 for (lac = ac, lav = av; lac != 0; lac--) {
3017                         fo->last = fo->first = strtoul(*lav++, &endptr, 10);
3018                         if (*endptr == '-')
3019                                 fo->last = strtoul(endptr+1, &endptr, 10);
3020                         if (*endptr)
3021                                 /* already warned */
3022                                 continue;
3023                         list_dyn_range(co, fo, &bp, dynbase, dynsz);
3024                 }
3025         }
3026
3027         bp_free(&bp);
3028         return (exitval);
3029 }
3030
3031
3032 /*
3033  * Retrieves current ipfw configuration of given type
3034  * and stores its pointer to @pcfg.
3035  *
3036  * Caller is responsible for freeing @pcfg.
3037  *
3038  * Returns 0 on success.
3039  */
3040
3041 static int
3042 ipfw_get_config(struct cmdline_opts *co, struct format_opts *fo,
3043     ipfw_cfg_lheader **pcfg, size_t *psize)
3044 {
3045         ipfw_cfg_lheader *cfg;
3046         size_t sz;
3047         int i;
3048
3049
3050         if (co->test_only != 0) {
3051                 fprintf(stderr, "Testing only, list disabled\n");
3052                 return (0);
3053         }
3054
3055         /* Start with some data size */
3056         sz = 4096;
3057         cfg = NULL;
3058
3059         for (i = 0; i < 16; i++) {
3060                 if (cfg != NULL)
3061                         free(cfg);
3062                 if ((cfg = calloc(1, sz)) == NULL)
3063                         return (ENOMEM);
3064
3065                 cfg->flags = fo->flags;
3066                 cfg->start_rule = fo->first;
3067                 cfg->end_rule = fo->last;
3068
3069                 if (do_get3(IP_FW_XGET, &cfg->opheader, &sz) != 0) {
3070                         if (errno != ENOMEM) {
3071                                 free(cfg);
3072                                 return (errno);
3073                         }
3074
3075                         /* Buffer size is not enough. Try to increase */
3076                         sz = sz * 2;
3077                         if (sz < cfg->size)
3078                                 sz = cfg->size;
3079                         continue;
3080                 }
3081
3082                 *pcfg = cfg;
3083                 *psize = sz;
3084                 return (0);
3085         }
3086
3087         free(cfg);
3088         return (ENOMEM);
3089 }
3090
3091 static int
3092 lookup_host (char *host, struct in_addr *ipaddr)
3093 {
3094         struct hostent *he;
3095
3096         if (!inet_aton(host, ipaddr)) {
3097                 if ((he = gethostbyname(host)) == NULL)
3098                         return(-1);
3099                 *ipaddr = *(struct in_addr *)he->h_addr_list[0];
3100         }
3101         return(0);
3102 }
3103
3104 struct tidx {
3105         ipfw_obj_ntlv *idx;
3106         uint32_t count;
3107         uint32_t size;
3108         uint16_t counter;
3109         uint8_t set;
3110 };
3111
3112 int
3113 ipfw_check_object_name(const char *name)
3114 {
3115         int c, i, l;
3116
3117         /*
3118          * Check that name is null-terminated and contains
3119          * valid symbols only. Valid mask is:
3120          * [a-zA-Z0-9\-_\.]{1,63}
3121          */
3122         l = strlen(name);
3123         if (l == 0 || l >= 64)
3124                 return (EINVAL);
3125         for (i = 0; i < l; i++) {
3126                 c = name[i];
3127                 if (isalpha(c) || isdigit(c) || c == '_' ||
3128                     c == '-' || c == '.')
3129                         continue;
3130                 return (EINVAL);
3131         }
3132         return (0);
3133 }
3134
3135 static const char *default_state_name = "default";
3136
3137 static int
3138 state_check_name(const char *name)
3139 {
3140
3141         if (ipfw_check_object_name(name) != 0)
3142                 return (EINVAL);
3143         if (strcmp(name, "any") == 0)
3144                 return (EINVAL);
3145         return (0);
3146 }
3147
3148 static int
3149 eaction_check_name(const char *name)
3150 {
3151
3152         if (ipfw_check_object_name(name) != 0)
3153                 return (EINVAL);
3154         /* Restrict some 'special' names */
3155         if (match_token(rule_actions, name) != -1 &&
3156             match_token(rule_action_params, name) != -1)
3157                 return (EINVAL);
3158         return (0);
3159 }
3160
3161 static uint16_t
3162 pack_object(struct tidx *tstate, const char *name, int otype)
3163 {
3164         ipfw_obj_ntlv *ntlv;
3165         uint32_t i;
3166
3167         for (i = 0; i < tstate->count; i++) {
3168                 if (strcmp(tstate->idx[i].name, name) != 0)
3169                         continue;
3170                 if (tstate->idx[i].set != tstate->set)
3171                         continue;
3172                 if (tstate->idx[i].head.type != otype)
3173                         continue;
3174
3175                 return (tstate->idx[i].idx);
3176         }
3177
3178         if (tstate->count + 1 > tstate->size) {
3179                 tstate->size += 4;
3180                 tstate->idx = realloc(tstate->idx, tstate->size *
3181                     sizeof(ipfw_obj_ntlv));
3182                 if (tstate->idx == NULL)
3183                         return (0);
3184         }
3185
3186         ntlv = &tstate->idx[i];
3187         memset(ntlv, 0, sizeof(ipfw_obj_ntlv));
3188         strlcpy(ntlv->name, name, sizeof(ntlv->name));
3189         ntlv->head.type = otype;
3190         ntlv->head.length = sizeof(ipfw_obj_ntlv);
3191         ntlv->set = tstate->set;
3192         ntlv->idx = ++tstate->counter;
3193         tstate->count++;
3194
3195         return (ntlv->idx);
3196 }
3197
3198 static uint16_t
3199 pack_table(struct tidx *tstate, const char *name)
3200 {
3201
3202         if (table_check_name(name) != 0)
3203                 return (0);
3204
3205         return (pack_object(tstate, name, IPFW_TLV_TBL_NAME));
3206 }
3207
3208 void
3209 fill_table(struct _ipfw_insn *cmd, char *av, uint8_t opcode,
3210     struct tidx *tstate)
3211 {
3212         uint32_t *d = ((ipfw_insn_u32 *)cmd)->d;
3213         uint16_t uidx;
3214         char *p;
3215
3216         if ((p = strchr(av + 6, ')')) == NULL)
3217                 errx(EX_DATAERR, "forgotten parenthesis: '%s'", av);
3218         *p = '\0';
3219         p = strchr(av + 6, ',');
3220         if (p)
3221                 *p++ = '\0';
3222
3223         if ((uidx = pack_table(tstate, av + 6)) == 0)
3224                 errx(EX_DATAERR, "Invalid table name: %s", av + 6);
3225
3226         cmd->opcode = opcode;
3227         cmd->arg1 = uidx;
3228         if (p) {
3229                 cmd->len |= F_INSN_SIZE(ipfw_insn_u32);
3230                 d[0] = strtoul(p, NULL, 0);
3231         } else
3232                 cmd->len |= F_INSN_SIZE(ipfw_insn);
3233 }
3234
3235
3236 /*
3237  * fills the addr and mask fields in the instruction as appropriate from av.
3238  * Update length as appropriate.
3239  * The following formats are allowed:
3240  *      me      returns O_IP_*_ME
3241  *      1.2.3.4         single IP address
3242  *      1.2.3.4:5.6.7.8 address:mask
3243  *      1.2.3.4/24      address/mask
3244  *      1.2.3.4/26{1,6,5,4,23}  set of addresses in a subnet
3245  * We can have multiple comma-separated address/mask entries.
3246  */
3247 static void
3248 fill_ip(ipfw_insn_ip *cmd, char *av, int cblen, struct tidx *tstate)
3249 {
3250         int len = 0;
3251         uint32_t *d = ((ipfw_insn_u32 *)cmd)->d;
3252
3253         cmd->o.len &= ~F_LEN_MASK;      /* zero len */
3254
3255         if (_substrcmp(av, "any") == 0)
3256                 return;
3257
3258         if (_substrcmp(av, "me") == 0) {
3259                 cmd->o.len |= F_INSN_SIZE(ipfw_insn);
3260                 return;
3261         }
3262
3263         if (strncmp(av, "table(", 6) == 0) {
3264                 fill_table(&cmd->o, av, O_IP_DST_LOOKUP, tstate);
3265                 return;
3266         }
3267
3268     while (av) {
3269         /*
3270          * After the address we can have '/' or ':' indicating a mask,
3271          * ',' indicating another address follows, '{' indicating a
3272          * set of addresses of unspecified size.
3273          */
3274         char *t = NULL, *p = strpbrk(av, "/:,{");
3275         int masklen;
3276         char md, nd = '\0';
3277
3278         CHECK_LENGTH(cblen, (int)F_INSN_SIZE(ipfw_insn) + 2 + len);
3279
3280         if (p) {
3281                 md = *p;
3282                 *p++ = '\0';
3283                 if ((t = strpbrk(p, ",{")) != NULL) {
3284                         nd = *t;
3285                         *t = '\0';
3286                 }
3287         } else
3288                 md = '\0';
3289
3290         if (lookup_host(av, (struct in_addr *)&d[0]) != 0)
3291                 errx(EX_NOHOST, "hostname ``%s'' unknown", av);
3292         switch (md) {
3293         case ':':
3294                 if (!inet_aton(p, (struct in_addr *)&d[1]))
3295                         errx(EX_DATAERR, "bad netmask ``%s''", p);
3296                 break;
3297         case '/':
3298                 masklen = atoi(p);
3299                 if (masklen == 0)
3300                         d[1] = htonl(0U);       /* mask */
3301                 else if (masklen > 32)
3302                         errx(EX_DATAERR, "bad width ``%s''", p);
3303                 else
3304                         d[1] = htonl(~0U << (32 - masklen));
3305                 break;
3306         case '{':       /* no mask, assume /24 and put back the '{' */
3307                 d[1] = htonl(~0U << (32 - 24));
3308                 *(--p) = md;
3309                 break;
3310
3311         case ',':       /* single address plus continuation */
3312                 *(--p) = md;
3313                 /* FALLTHROUGH */
3314         case 0:         /* initialization value */
3315         default:
3316                 d[1] = htonl(~0U);      /* force /32 */
3317                 break;
3318         }
3319         d[0] &= d[1];           /* mask base address with mask */
3320         if (t)
3321                 *t = nd;
3322         /* find next separator */
3323         if (p)
3324                 p = strpbrk(p, ",{");
3325         if (p && *p == '{') {
3326                 /*
3327                  * We have a set of addresses. They are stored as follows:
3328                  *   arg1       is the set size (powers of 2, 2..256)
3329                  *   addr       is the base address IN HOST FORMAT
3330                  *   mask..     is an array of arg1 bits (rounded up to
3331                  *              the next multiple of 32) with bits set
3332                  *              for each host in the map.
3333                  */
3334                 uint32_t *map = (uint32_t *)&cmd->mask;
3335                 int low, high;
3336                 int i = contigmask((uint8_t *)&(d[1]), 32);
3337
3338                 if (len > 0)
3339                         errx(EX_DATAERR, "address set cannot be in a list");
3340                 if (i < 24 || i > 31)
3341                         errx(EX_DATAERR, "invalid set with mask %d\n", i);
3342                 cmd->o.arg1 = 1<<(32-i);        /* map length           */
3343                 d[0] = ntohl(d[0]);             /* base addr in host format */
3344                 cmd->o.opcode = O_IP_DST_SET;   /* default */
3345                 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32) + (cmd->o.arg1+31)/32;
3346                 for (i = 0; i < (cmd->o.arg1+31)/32 ; i++)
3347                         map[i] = 0;     /* clear map */
3348
3349                 av = p + 1;
3350                 low = d[0] & 0xff;
3351                 high = low + cmd->o.arg1 - 1;
3352                 /*
3353                  * Here, i stores the previous value when we specify a range
3354                  * of addresses within a mask, e.g. 45-63. i = -1 means we
3355                  * have no previous value.
3356                  */
3357                 i = -1; /* previous value in a range */
3358                 while (isdigit(*av)) {
3359                         char *s;
3360                         int a = strtol(av, &s, 0);
3361
3362                         if (s == av) { /* no parameter */
3363                             if (*av != '}')
3364                                 errx(EX_DATAERR, "set not closed\n");
3365                             if (i != -1)
3366                                 errx(EX_DATAERR, "incomplete range %d-", i);
3367                             break;
3368                         }
3369                         if (a < low || a > high)
3370                             errx(EX_DATAERR, "addr %d out of range [%d-%d]\n",
3371                                 a, low, high);
3372                         a -= low;
3373                         if (i == -1)    /* no previous in range */
3374                             i = a;
3375                         else {          /* check that range is valid */
3376                             if (i > a)
3377                                 errx(EX_DATAERR, "invalid range %d-%d",
3378                                         i+low, a+low);
3379                             if (*s == '-')
3380                                 errx(EX_DATAERR, "double '-' in range");
3381                         }
3382                         for (; i <= a; i++)
3383                             map[i/32] |= 1<<(i & 31);
3384                         i = -1;
3385                         if (*s == '-')
3386                             i = a;
3387                         else if (*s == '}')
3388                             break;
3389                         av = s+1;
3390                 }
3391                 return;
3392         }
3393         av = p;
3394         if (av)                 /* then *av must be a ',' */
3395                 av++;
3396
3397         /* Check this entry */
3398         if (d[1] == 0) { /* "any", specified as x.x.x.x/0 */
3399                 /*
3400                  * 'any' turns the entire list into a NOP.
3401                  * 'not any' never matches, so it is removed from the
3402                  * list unless it is the only item, in which case we
3403                  * report an error.
3404                  */
3405                 if (cmd->o.len & F_NOT) {       /* "not any" never matches */
3406                         if (av == NULL && len == 0) /* only this entry */
3407                                 errx(EX_DATAERR, "not any never matches");
3408                 }
3409                 /* else do nothing and skip this entry */
3410                 return;
3411         }
3412         /* A single IP can be stored in an optimized format */
3413         if (d[1] == (uint32_t)~0 && av == NULL && len == 0) {
3414                 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32);
3415                 return;
3416         }
3417         len += 2;       /* two words... */
3418         d += 2;
3419     } /* end while */
3420     if (len + 1 > F_LEN_MASK)
3421         errx(EX_DATAERR, "address list too long");
3422     cmd->o.len |= len+1;
3423 }
3424
3425
3426 /* n2mask sets n bits of the mask */
3427 void
3428 n2mask(struct in6_addr *mask, int n)
3429 {
3430         static int      minimask[9] =
3431             { 0x00, 0x80, 0xc0, 0xe0, 0xf0, 0xf8, 0xfc, 0xfe, 0xff };
3432         u_char          *p;
3433
3434         memset(mask, 0, sizeof(struct in6_addr));
3435         p = (u_char *) mask;
3436         for (; n > 0; p++, n -= 8) {
3437                 if (n >= 8)
3438                         *p = 0xff;
3439                 else
3440                         *p = minimask[n];
3441         }
3442         return;
3443 }
3444
3445 static void
3446 fill_flags_cmd(ipfw_insn *cmd, enum ipfw_opcodes opcode,
3447         struct _s_x *flags, char *p)
3448 {
3449         char *e;
3450         uint32_t set = 0, clear = 0;
3451
3452         if (fill_flags(flags, p, &e, &set, &clear) != 0)
3453                 errx(EX_DATAERR, "invalid flag %s", e);
3454
3455         cmd->opcode = opcode;
3456         cmd->len =  (cmd->len & (F_NOT | F_OR)) | 1;
3457         cmd->arg1 = (set & 0xff) | ( (clear & 0xff) << 8);
3458 }
3459
3460
3461 void
3462 ipfw_delete(char *av[])
3463 {
3464         ipfw_range_tlv rt;
3465         char *sep;
3466         int i, j;
3467         int exitval = EX_OK;
3468         int do_set = 0;
3469
3470         av++;
3471         NEED1("missing rule specification");
3472         if ( *av && _substrcmp(*av, "set") == 0) {
3473                 /* Do not allow using the following syntax:
3474                  *      ipfw set N delete set M
3475                  */
3476                 if (g_co.use_set)
3477                         errx(EX_DATAERR, "invalid syntax");
3478                 do_set = 1;     /* delete set */
3479                 av++;
3480         }
3481
3482         /* Rule number */
3483         while (*av && isdigit(**av)) {
3484                 i = strtol(*av, &sep, 10);
3485                 j = i;
3486                 if (*sep== '-')
3487                         j = strtol(sep + 1, NULL, 10);
3488                 av++;
3489                 if (g_co.do_nat) {
3490                         exitval = ipfw_delete_nat(i);
3491                 } else if (g_co.do_pipe) {
3492                         exitval = ipfw_delete_pipe(g_co.do_pipe, i);
3493                 } else {
3494                         memset(&rt, 0, sizeof(rt));
3495                         if (do_set != 0) {
3496                                 rt.set = i & 31;
3497                                 rt.flags = IPFW_RCFLAG_SET;
3498                         } else {
3499                                 rt.start_rule = i & 0xffff;
3500                                 rt.end_rule = j & 0xffff;
3501                                 if (rt.start_rule == 0 && rt.end_rule == 0)
3502                                         rt.flags |= IPFW_RCFLAG_ALL;
3503                                 else
3504                                         rt.flags |= IPFW_RCFLAG_RANGE;
3505                                 if (g_co.use_set != 0) {
3506                                         rt.set = g_co.use_set - 1;
3507                                         rt.flags |= IPFW_RCFLAG_SET;
3508                                 }
3509                         }
3510                         if (g_co.do_dynamic == 2)
3511                                 rt.flags |= IPFW_RCFLAG_DYNAMIC;
3512                         i = do_range_cmd(IP_FW_XDEL, &rt);
3513                         if (i != 0) {
3514                                 exitval = EX_UNAVAILABLE;
3515                                 if (g_co.do_quiet)
3516                                         continue;
3517                                 warn("rule %u: setsockopt(IP_FW_XDEL)",
3518                                     rt.start_rule);
3519                         } else if (rt.new_set == 0 && do_set == 0 &&
3520                             g_co.do_dynamic != 2) {
3521                                 exitval = EX_UNAVAILABLE;
3522                                 if (g_co.do_quiet)
3523                                         continue;
3524                                 if (rt.start_rule != rt.end_rule)
3525                                         warnx("no rules in %u-%u range",
3526                                             rt.start_rule, rt.end_rule);
3527                                 else
3528                                         warnx("rule %u not found",
3529                                             rt.start_rule);
3530                         }
3531                 }
3532         }
3533         if (exitval != EX_OK && g_co.do_force == 0)
3534                 exit(exitval);
3535 }
3536
3537
3538 /*
3539  * fill the interface structure. We do not check the name as we can
3540  * create interfaces dynamically, so checking them at insert time
3541  * makes relatively little sense.
3542  * Interface names containing '*', '?', or '[' are assumed to be shell
3543  * patterns which match interfaces.
3544  */
3545 static void
3546 fill_iface(ipfw_insn_if *cmd, char *arg, int cblen, struct tidx *tstate)
3547 {
3548         char *p;
3549         uint16_t uidx;
3550
3551         cmd->name[0] = '\0';
3552         cmd->o.len |= F_INSN_SIZE(ipfw_insn_if);
3553
3554         CHECK_CMDLEN;
3555
3556         /* Parse the interface or address */
3557         if (strcmp(arg, "any") == 0)
3558                 cmd->o.len = 0;         /* effectively ignore this command */
3559         else if (strncmp(arg, "table(", 6) == 0) {
3560                 if ((p = strchr(arg + 6, ')')) == NULL)
3561                         errx(EX_DATAERR, "forgotten parenthesis: '%s'", arg);
3562                 *p = '\0';
3563                 p = strchr(arg + 6, ',');
3564                 if (p)
3565                         *p++ = '\0';
3566                 if ((uidx = pack_table(tstate, arg + 6)) == 0)
3567                         errx(EX_DATAERR, "Invalid table name: %s", arg + 6);
3568
3569                 cmd->name[0] = '\1'; /* Special value indicating table */
3570                 cmd->p.kidx = uidx;
3571         } else if (!isdigit(*arg)) {
3572                 strlcpy(cmd->name, arg, sizeof(cmd->name));
3573                 cmd->p.glob = strpbrk(arg, "*?[") != NULL ? 1 : 0;
3574         } else if (!inet_aton(arg, &cmd->p.ip))
3575                 errx(EX_DATAERR, "bad ip address ``%s''", arg);
3576 }
3577
3578 static void
3579 get_mac_addr_mask(const char *p, uint8_t *addr, uint8_t *mask)
3580 {
3581         int i;
3582         size_t l;
3583         char *ap, *ptr, *optr;
3584         struct ether_addr *mac;
3585         const char *macset = "0123456789abcdefABCDEF:";
3586
3587         if (strcmp(p, "any") == 0) {
3588                 for (i = 0; i < ETHER_ADDR_LEN; i++)
3589                         addr[i] = mask[i] = 0;
3590                 return;
3591         }
3592
3593         optr = ptr = strdup(p);
3594         if ((ap = strsep(&ptr, "&/")) != NULL && *ap != 0) {
3595                 l = strlen(ap);
3596                 if (strspn(ap, macset) != l || (mac = ether_aton(ap)) == NULL)
3597                         errx(EX_DATAERR, "Incorrect MAC address");
3598                 bcopy(mac, addr, ETHER_ADDR_LEN);
3599         } else
3600                 errx(EX_DATAERR, "Incorrect MAC address");
3601
3602         if (ptr != NULL) { /* we have mask? */
3603                 if (p[ptr - optr - 1] == '/') { /* mask len */
3604                         long ml = strtol(ptr, &ap, 10);
3605                         if (*ap != 0 || ml > ETHER_ADDR_LEN * 8 || ml < 0)
3606                                 errx(EX_DATAERR, "Incorrect mask length");
3607                         for (i = 0; ml > 0 && i < ETHER_ADDR_LEN; ml -= 8, i++)
3608                                 mask[i] = (ml >= 8) ? 0xff: (~0) << (8 - ml);
3609                 } else { /* mask */
3610                         l = strlen(ptr);
3611                         if (strspn(ptr, macset) != l ||
3612                             (mac = ether_aton(ptr)) == NULL)
3613                                 errx(EX_DATAERR, "Incorrect mask");
3614                         bcopy(mac, mask, ETHER_ADDR_LEN);
3615                 }
3616         } else { /* default mask: ff:ff:ff:ff:ff:ff */
3617                 for (i = 0; i < ETHER_ADDR_LEN; i++)
3618                         mask[i] = 0xff;
3619         }
3620         for (i = 0; i < ETHER_ADDR_LEN; i++)
3621                 addr[i] &= mask[i];
3622
3623         free(optr);
3624 }
3625
3626 /*
3627  * helper function, updates the pointer to cmd with the length
3628  * of the current command, and also cleans up the first word of
3629  * the new command in case it has been clobbered before.
3630  */
3631 static ipfw_insn *
3632 next_cmd(ipfw_insn *cmd, int *len)
3633 {
3634         *len -= F_LEN(cmd);
3635         CHECK_LENGTH(*len, 0);
3636         cmd += F_LEN(cmd);
3637         bzero(cmd, sizeof(*cmd));
3638         return cmd;
3639 }
3640
3641 /*
3642  * Takes arguments and copies them into a comment
3643  */
3644 static void
3645 fill_comment(ipfw_insn *cmd, char **av, int cblen)
3646 {
3647         int i, l;
3648         char *p = (char *)(cmd + 1);
3649
3650         cmd->opcode = O_NOP;
3651         cmd->len =  (cmd->len & (F_NOT | F_OR));
3652
3653         /* Compute length of comment string. */
3654         for (i = 0, l = 0; av[i] != NULL; i++)
3655                 l += strlen(av[i]) + 1;
3656         if (l == 0)
3657                 return;
3658         if (l > 84)
3659                 errx(EX_DATAERR,
3660                     "comment too long (max 80 chars)");
3661         l = 1 + (l+3)/4;
3662         cmd->len =  (cmd->len & (F_NOT | F_OR)) | l;
3663         CHECK_CMDLEN;
3664
3665         for (i = 0; av[i] != NULL; i++) {
3666                 strcpy(p, av[i]);
3667                 p += strlen(av[i]);
3668                 *p++ = ' ';
3669         }
3670         *(--p) = '\0';
3671 }
3672
3673 /*
3674  * A function to fill simple commands of size 1.
3675  * Existing flags are preserved.
3676  */
3677 static void
3678 fill_cmd(ipfw_insn *cmd, enum ipfw_opcodes opcode, int flags, uint16_t arg)
3679 {
3680         cmd->opcode = opcode;
3681         cmd->len =  ((cmd->len | flags) & (F_NOT | F_OR)) | 1;
3682         cmd->arg1 = arg;
3683 }
3684
3685 /*
3686  * Fetch and add the MAC address and type, with masks. This generates one or
3687  * two microinstructions, and returns the pointer to the last one.
3688  */
3689 static ipfw_insn *
3690 add_mac(ipfw_insn *cmd, char *av[], int cblen)
3691 {
3692         ipfw_insn_mac *mac;
3693
3694         if ( ( av[0] == NULL ) || ( av[1] == NULL ) )
3695                 errx(EX_DATAERR, "MAC dst src");
3696
3697         cmd->opcode = O_MACADDR2;
3698         cmd->len = (cmd->len & (F_NOT | F_OR)) | F_INSN_SIZE(ipfw_insn_mac);
3699         CHECK_CMDLEN;
3700
3701         mac = (ipfw_insn_mac *)cmd;
3702         get_mac_addr_mask(av[0], mac->addr, mac->mask); /* dst */
3703         get_mac_addr_mask(av[1], &(mac->addr[ETHER_ADDR_LEN]),
3704             &(mac->mask[ETHER_ADDR_LEN])); /* src */
3705         return cmd;
3706 }
3707
3708 static ipfw_insn *
3709 add_mactype(ipfw_insn *cmd, char *av, int cblen)
3710 {
3711         if (!av)
3712                 errx(EX_DATAERR, "missing MAC type");
3713         if (strcmp(av, "any") != 0) { /* we have a non-null type */
3714                 fill_newports((ipfw_insn_u16 *)cmd, av, IPPROTO_ETHERTYPE,
3715                     cblen);
3716                 cmd->opcode = O_MAC_TYPE;
3717                 return cmd;
3718         } else
3719                 return NULL;
3720 }
3721
3722 static ipfw_insn *
3723 add_proto0(ipfw_insn *cmd, char *av, u_char *protop)
3724 {
3725         struct protoent *pe;
3726         char *ep;
3727         int proto;
3728
3729         proto = strtol(av, &ep, 10);
3730         if (*ep != '\0' || proto <= 0) {
3731                 if ((pe = getprotobyname(av)) == NULL)
3732                         return NULL;
3733                 proto = pe->p_proto;
3734         }
3735
3736         fill_cmd(cmd, O_PROTO, 0, proto);
3737         *protop = proto;
3738         return cmd;
3739 }
3740
3741 static ipfw_insn *
3742 add_proto(ipfw_insn *cmd, char *av, u_char *protop)
3743 {
3744         u_char proto = IPPROTO_IP;
3745
3746         if (_substrcmp(av, "all") == 0 || strcmp(av, "ip") == 0)
3747                 ; /* do not set O_IP4 nor O_IP6 */
3748         else if (strcmp(av, "ip4") == 0)
3749                 /* explicit "just IPv4" rule */
3750                 fill_cmd(cmd, O_IP4, 0, 0);
3751         else if (strcmp(av, "ip6") == 0) {
3752                 /* explicit "just IPv6" rule */
3753                 proto = IPPROTO_IPV6;
3754                 fill_cmd(cmd, O_IP6, 0, 0);
3755         } else
3756                 return add_proto0(cmd, av, protop);
3757
3758         *protop = proto;
3759         return cmd;
3760 }
3761
3762 static ipfw_insn *
3763 add_proto_compat(ipfw_insn *cmd, char *av, u_char *protop)
3764 {
3765         u_char proto = IPPROTO_IP;
3766
3767         if (_substrcmp(av, "all") == 0 || strcmp(av, "ip") == 0)
3768                 ; /* do not set O_IP4 nor O_IP6 */
3769         else if (strcmp(av, "ipv4") == 0 || strcmp(av, "ip4") == 0)
3770                 /* explicit "just IPv4" rule */
3771                 fill_cmd(cmd, O_IP4, 0, 0);
3772         else if (strcmp(av, "ipv6") == 0 || strcmp(av, "ip6") == 0) {
3773                 /* explicit "just IPv6" rule */
3774                 proto = IPPROTO_IPV6;
3775                 fill_cmd(cmd, O_IP6, 0, 0);
3776         } else
3777                 return add_proto0(cmd, av, protop);
3778
3779         *protop = proto;
3780         return cmd;
3781 }
3782
3783 static ipfw_insn *
3784 add_srcip(ipfw_insn *cmd, char *av, int cblen, struct tidx *tstate)
3785 {
3786         fill_ip((ipfw_insn_ip *)cmd, av, cblen, tstate);
3787         if (cmd->opcode == O_IP_DST_SET)                        /* set */
3788                 cmd->opcode = O_IP_SRC_SET;
3789         else if (cmd->opcode == O_IP_DST_LOOKUP)                /* table */
3790                 cmd->opcode = O_IP_SRC_LOOKUP;
3791         else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn))          /* me */
3792                 cmd->opcode = O_IP_SRC_ME;
3793         else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_u32))      /* one IP */
3794                 cmd->opcode = O_IP_SRC;
3795         else                                                    /* addr/mask */
3796                 cmd->opcode = O_IP_SRC_MASK;
3797         return cmd;
3798 }
3799
3800 static ipfw_insn *
3801 add_dstip(ipfw_insn *cmd, char *av, int cblen, struct tidx *tstate)
3802 {
3803         fill_ip((ipfw_insn_ip *)cmd, av, cblen, tstate);
3804         if (cmd->opcode == O_IP_DST_SET)                        /* set */
3805                 ;
3806         else if (cmd->opcode == O_IP_DST_LOOKUP)                /* table */
3807                 ;
3808         else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn))          /* me */
3809                 cmd->opcode = O_IP_DST_ME;
3810         else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_u32))      /* one IP */
3811                 cmd->opcode = O_IP_DST;
3812         else                                                    /* addr/mask */
3813                 cmd->opcode = O_IP_DST_MASK;
3814         return cmd;
3815 }
3816
3817 static ipfw_insn *
3818 add_srcmac(ipfw_insn *cmd, char *av, struct tidx *tstate)
3819 {
3820
3821         if (strncmp(av, "table(", 6) == 0)
3822                 fill_table(cmd, av, O_MAC_SRC_LOOKUP, tstate);
3823         else
3824                 errx(EX_DATAERR, "only mac table lookup is supported %s", av);
3825         return cmd;
3826 }
3827
3828 static ipfw_insn *
3829 add_dstmac(ipfw_insn *cmd, char *av, struct tidx *tstate)
3830 {
3831
3832         if (strncmp(av, "table(", 6) == 0)
3833                 fill_table(cmd, av, O_MAC_DST_LOOKUP, tstate);
3834         else
3835                 errx(EX_DATAERR, "only mac table lookup is supported %s", av);
3836         return cmd;
3837 }
3838
3839
3840 static struct _s_x f_reserved_keywords[] = {
3841         { "altq",       TOK_OR },
3842         { "//",         TOK_OR },
3843         { "diverted",   TOK_OR },
3844         { "dst-port",   TOK_OR },
3845         { "src-port",   TOK_OR },
3846         { "established",        TOK_OR },
3847         { "keep-state", TOK_OR },
3848         { "frag",       TOK_OR },
3849         { "icmptypes",  TOK_OR },
3850         { "in",         TOK_OR },
3851         { "out",        TOK_OR },
3852         { "ip6",        TOK_OR },
3853         { "any",        TOK_OR },
3854         { "to",         TOK_OR },
3855         { "via",        TOK_OR },
3856         { "{",          TOK_OR },
3857         { NULL, 0 }     /* terminator */
3858 };
3859
3860 static ipfw_insn *
3861 add_ports(ipfw_insn *cmd, char *av, u_char proto, int opcode, int cblen)
3862 {
3863
3864         if (match_token(f_reserved_keywords, av) != -1)
3865                 return (NULL);
3866
3867         if (fill_newports((ipfw_insn_u16 *)cmd, av, proto, cblen)) {
3868                 /* XXX todo: check that we have a protocol with ports */
3869                 cmd->opcode = opcode;
3870                 return cmd;
3871         }
3872         return NULL;
3873 }
3874
3875 static ipfw_insn *
3876 add_src(ipfw_insn *cmd, char *av, u_char proto, int cblen, struct tidx *tstate)
3877 {
3878         struct in6_addr a;
3879         char *host, *ch, buf[INET6_ADDRSTRLEN];
3880         ipfw_insn *ret = NULL;
3881         size_t len;
3882
3883         /* Copy first address in set if needed */
3884         if ((ch = strpbrk(av, "/,")) != NULL) {
3885                 len = ch - av;
3886                 strlcpy(buf, av, sizeof(buf));
3887                 if (len < sizeof(buf))
3888                         buf[len] = '\0';
3889                 host = buf;
3890         } else
3891                 host = av;
3892
3893         if (proto == IPPROTO_IPV6  || strcmp(av, "me6") == 0 ||
3894             inet_pton(AF_INET6, host, &a) == 1)
3895                 ret = add_srcip6(cmd, av, cblen, tstate);
3896         /* XXX: should check for IPv4, not !IPv6 */
3897         if (ret == NULL && (proto == IPPROTO_IP || strcmp(av, "me") == 0 ||
3898             inet_pton(AF_INET6, host, &a) != 1))
3899                 ret = add_srcip(cmd, av, cblen, tstate);
3900         if (ret == NULL && strcmp(av, "any") != 0)
3901                 ret = cmd;
3902
3903         return ret;
3904 }
3905
3906 static ipfw_insn *
3907 add_dst(ipfw_insn *cmd, char *av, u_char proto, int cblen, struct tidx *tstate)
3908 {
3909         struct in6_addr a;
3910         char *host, *ch, buf[INET6_ADDRSTRLEN];
3911         ipfw_insn *ret = NULL;
3912         size_t len;
3913
3914         /* Copy first address in set if needed */
3915         if ((ch = strpbrk(av, "/,")) != NULL) {
3916                 len = ch - av;
3917                 strlcpy(buf, av, sizeof(buf));
3918                 if (len < sizeof(buf))
3919                         buf[len] = '\0';
3920                 host = buf;
3921         } else
3922                 host = av;
3923
3924         if (proto == IPPROTO_IPV6  || strcmp(av, "me6") == 0 ||
3925             inet_pton(AF_INET6, host, &a) == 1)
3926                 ret = add_dstip6(cmd, av, cblen, tstate);
3927         /* XXX: should check for IPv4, not !IPv6 */
3928         if (ret == NULL && (proto == IPPROTO_IP || strcmp(av, "me") == 0 ||
3929             inet_pton(AF_INET6, host, &a) != 1))
3930                 ret = add_dstip(cmd, av, cblen, tstate);
3931         if (ret == NULL && strcmp(av, "any") != 0)
3932                 ret = cmd;
3933
3934         return ret;
3935 }
3936
3937 static inline int
3938 arg_or_targ_relaxed(const char *arg, const char *action)
3939 {
3940         uint32_t arg1 = (uint32_t)(-1);
3941
3942         if (arg == NULL)
3943                 errx(EX_USAGE, "missing argument for %s", action);
3944         if (isdigit(arg[0])) {
3945                 arg1 = strtoul(arg, NULL, 10);
3946                 if (arg1 <= 0 || arg1 >= IP_FW_TABLEARG)
3947                         errx(EX_DATAERR, "illegal argument %s(%u) for %s",
3948                             arg, arg1, action);
3949         } else if (_substrcmp(arg, "tablearg") == 0)
3950                 arg1 = IP_FW_TARG;
3951         return (arg1);
3952 }
3953
3954 static inline uint16_t
3955 arg_or_targ(const char *arg, const char *action)
3956 {
3957         uint32_t arg1 = arg_or_targ_relaxed(arg, action);
3958
3959         if (arg1 == (uint32_t)(-1))
3960                 errx(EX_DATAERR, "illegal argument %s(%u) for %s",
3961                     arg, arg1, action);
3962         return (arg1);
3963 }
3964
3965 static uint16_t
3966 get_divert_port(const char *arg, const char *action)
3967 {
3968         uint32_t arg1 = arg_or_targ_relaxed(arg, action);
3969
3970         if (arg1 != (uint32_t)(-1))
3971                 return (arg1);
3972
3973         struct servent *s;
3974         setservent(1);
3975         s = getservbyname(arg, "divert");
3976         if (s == NULL)
3977                 errx(EX_DATAERR, "illegal divert/tee port");
3978         return (ntohs(s->s_port));
3979 }
3980
3981 /*
3982  * Parse arguments and assemble the microinstructions which make up a rule.
3983  * Rules are added into the 'rulebuf' and then copied in the correct order
3984  * into the actual rule.
3985  *
3986  * The syntax for a rule starts with the action, followed by
3987  * optional action parameters, and the various match patterns.
3988  * In the assembled microcode, the first opcode must be an O_PROBE_STATE
3989  * (generated if the rule includes a keep-state option), then the
3990  * various match patterns, log/altq actions, and the actual action.
3991  *
3992  */
3993 static void
3994 compile_rule(char *av[], uint32_t *rbuf, int *rbufsize, struct tidx *tstate)
3995 {
3996         /*
3997          * rules are added into the 'rulebuf' and then copied in
3998          * the correct order into the actual rule.
3999          * Some things that need to go out of order (prob, action etc.)
4000          * go into actbuf[].
4001          */
4002         static uint32_t actbuf[255], cmdbuf[255];
4003         int rblen, ablen, cblen;
4004
4005         ipfw_insn *src, *dst, *cmd, *action, *prev=NULL;
4006         ipfw_insn *first_cmd;   /* first match pattern */
4007
4008         struct ip_fw_rule *rule;
4009
4010         /*
4011          * various flags used to record that we entered some fields.
4012          */
4013         ipfw_insn *have_state = NULL;   /* any state-related option */
4014         int have_rstate = 0;
4015         ipfw_insn *have_log = NULL, *have_altq = NULL, *have_tag = NULL;
4016         ipfw_insn *have_skipcmd = NULL;
4017         size_t len;
4018
4019         int i;
4020
4021         int open_par = 0;       /* open parenthesis ( */
4022
4023         /* proto is here because it is used to fetch ports */
4024         u_char proto = IPPROTO_IP;      /* default protocol */
4025
4026         double match_prob = 1; /* match probability, default is always match */
4027
4028         bzero(actbuf, sizeof(actbuf));          /* actions go here */
4029         bzero(cmdbuf, sizeof(cmdbuf));
4030         bzero(rbuf, *rbufsize);
4031
4032         rule = (struct ip_fw_rule *)rbuf;
4033         cmd = (ipfw_insn *)cmdbuf;
4034         action = (ipfw_insn *)actbuf;
4035
4036         rblen = *rbufsize / sizeof(uint32_t);
4037         rblen -= sizeof(struct ip_fw_rule) / sizeof(uint32_t);
4038         ablen = sizeof(actbuf) / sizeof(actbuf[0]);
4039         cblen = sizeof(cmdbuf) / sizeof(cmdbuf[0]);
4040         cblen -= F_INSN_SIZE(ipfw_insn_u32) + 1;
4041
4042 #define CHECK_RBUFLEN(len)      { CHECK_LENGTH(rblen, len); rblen -= len; }
4043 #define CHECK_ACTLEN            CHECK_LENGTH(ablen, action->len)
4044
4045         av++;
4046
4047         /* [rule N]     -- Rule number optional */
4048         if (av[0] && isdigit(**av)) {
4049                 rule->rulenum = atoi(*av);
4050                 av++;
4051         }
4052
4053         /* [set N]      -- set number (0..RESVD_SET), optional */
4054         if (av[0] && av[1] && _substrcmp(*av, "set") == 0) {
4055                 int set = strtoul(av[1], NULL, 10);
4056                 if (set < 0 || set > RESVD_SET)
4057                         errx(EX_DATAERR, "illegal set %s", av[1]);
4058                 rule->set = set;
4059                 tstate->set = set;
4060                 av += 2;
4061         }
4062
4063         /* [prob D]     -- match probability, optional */
4064         if (av[0] && av[1] && _substrcmp(*av, "prob") == 0) {
4065                 match_prob = strtod(av[1], NULL);
4066
4067                 if (match_prob <= 0 || match_prob > 1)
4068                         errx(EX_DATAERR, "illegal match prob. %s", av[1]);
4069                 av += 2;
4070         }
4071
4072         /* action       -- mandatory */
4073         NEED1("missing action");
4074         i = match_token(rule_actions, *av);
4075         av++;
4076         action->len = 1;        /* default */
4077         CHECK_ACTLEN;
4078         switch(i) {
4079         case TOK_CHECKSTATE:
4080                 have_state = action;
4081                 action->opcode = O_CHECK_STATE;
4082                 if (*av == NULL ||
4083                     match_token(rule_options, *av) == TOK_COMMENT) {
4084                         action->arg1 = pack_object(tstate,
4085                             default_state_name, IPFW_TLV_STATE_NAME);
4086                         break;
4087                 }
4088                 if (*av[0] == ':') {
4089                         if (strcmp(*av + 1, "any") == 0)
4090                                 action->arg1 = 0;
4091                         else if (state_check_name(*av + 1) == 0)
4092                                 action->arg1 = pack_object(tstate, *av + 1,
4093                                     IPFW_TLV_STATE_NAME);
4094                         else
4095                                 errx(EX_DATAERR, "Invalid state name %s",
4096                                     *av);
4097                         av++;
4098                         break;
4099                 }
4100                 errx(EX_DATAERR, "Invalid state name %s", *av);
4101                 break;
4102
4103         case TOK_ABORT:
4104                 action->opcode = O_REJECT;
4105                 action->arg1 = ICMP_REJECT_ABORT;
4106                 break;
4107
4108         case TOK_ABORT6:
4109                 action->opcode = O_UNREACH6;
4110                 action->arg1 = ICMP6_UNREACH_ABORT;
4111                 break;
4112
4113         case TOK_ACCEPT:
4114                 action->opcode = O_ACCEPT;
4115                 break;
4116
4117         case TOK_DENY:
4118                 action->opcode = O_DENY;
4119                 action->arg1 = 0;
4120                 break;
4121
4122         case TOK_REJECT:
4123                 action->opcode = O_REJECT;
4124                 action->arg1 = ICMP_UNREACH_HOST;
4125                 break;
4126
4127         case TOK_RESET:
4128                 action->opcode = O_REJECT;
4129                 action->arg1 = ICMP_REJECT_RST;
4130                 break;
4131
4132         case TOK_RESET6:
4133                 action->opcode = O_UNREACH6;
4134                 action->arg1 = ICMP6_UNREACH_RST;
4135                 break;
4136
4137         case TOK_UNREACH:
4138                 action->opcode = O_REJECT;
4139                 NEED1("missing reject code");
4140                 action->arg1 = get_reject_code(*av);
4141                 av++;
4142                 if (action->arg1 == ICMP_UNREACH_NEEDFRAG && isdigit(**av)) {
4143                         uint16_t mtu;
4144
4145                         mtu = strtoul(*av, NULL, 10);
4146                         if (mtu < 68 || mtu >= IP_MAXPACKET)
4147                                 errx(EX_DATAERR, "illegal argument for %s",
4148                                     *(av - 1));
4149                         action->len = F_INSN_SIZE(ipfw_insn_u16);
4150                         ((ipfw_insn_u16 *)action)->ports[0] = mtu;
4151                         av++;
4152                 }
4153                 break;
4154
4155         case TOK_UNREACH6:
4156                 action->opcode = O_UNREACH6;
4157                 NEED1("missing unreach code");
4158                 action->arg1 = get_unreach6_code(*av);
4159                 av++;
4160                 break;
4161
4162         case TOK_COUNT:
4163                 action->opcode = O_COUNT;
4164                 break;
4165
4166         case TOK_NAT:
4167                 action->opcode = O_NAT;
4168                 action->len = F_INSN_SIZE(ipfw_insn_nat);
4169                 CHECK_ACTLEN;
4170                 if (*av != NULL && _substrcmp(*av, "global") == 0)
4171                         action->arg1 = IP_FW_NAT44_GLOBAL;
4172                 else
4173                         action->arg1 = arg_or_targ(av[0], *(av - 1));
4174                 av++;
4175                 break;
4176         case TOK_QUEUE:
4177                 action->opcode = O_QUEUE;
4178                 action->arg1 = arg_or_targ(av[0], *(av - 1));
4179                 av++;
4180                 break;
4181         case TOK_PIPE:
4182                 action->opcode = O_PIPE;
4183                 action->arg1 = arg_or_targ(av[0], *(av - 1));
4184                 av++;
4185                 break;
4186         case TOK_SKIPTO:
4187                 action->opcode = O_SKIPTO;
4188                 action->arg1 = arg_or_targ(av[0], *(av - 1));
4189                 av++;
4190                 break;
4191         case TOK_NETGRAPH:
4192                 action->opcode = O_NETGRAPH;
4193                 action->arg1 = arg_or_targ(av[0], *(av - 1));
4194                 av++;
4195                 break;
4196         case TOK_NGTEE:
4197                 action->opcode = O_NGTEE;
4198                 action->arg1 = arg_or_targ(av[0], *(av - 1));
4199                 av++;
4200                 break;
4201         case TOK_DIVERT:
4202                 action->opcode = O_DIVERT;
4203                 action->arg1 = get_divert_port(av[0], *(av - 1));
4204                 av++;
4205                 break;
4206         case TOK_TEE:
4207                 action->opcode = O_TEE;
4208                 action->arg1 = get_divert_port(av[0], *(av - 1));
4209                 av++;
4210                 break;
4211         case TOK_CALL:
4212                 action->opcode = O_CALLRETURN;
4213                 action->arg1 = arg_or_targ(av[0], *(av - 1));
4214                 av++;
4215                 break;
4216
4217         case TOK_FORWARD: {
4218                 /*
4219                  * Locate the address-port separator (':' or ',').
4220                  * Could be one of the following:
4221                  *      hostname:port
4222                  *      IPv4 a.b.c.d,port
4223                  *      IPv4 a.b.c.d:port
4224                  *      IPv6 w:x:y::z,port
4225                  *      IPv6 [w:x:y::z]:port
4226                  */
4227                 struct sockaddr_storage result;
4228                 struct addrinfo *res;
4229                 char *s, *end;
4230                 int family;
4231                 u_short port_number = 0;
4232
4233                 NEED1("missing forward address[:port]");
4234
4235                 if (strncmp(*av, "tablearg", 8) == 0 &&
4236                     ((*av)[8] == '\0' || (*av)[8] == ',' || (*av)[8] == ':'))
4237                         memcpy(++(*av), "0.0.0.0", 7);
4238
4239                 /*
4240                  * Are we an bracket-enclosed IPv6 address?
4241                  */
4242                 if (strchr(*av, '['))
4243                         (*av)++;
4244
4245                 /*
4246                  * locate the address-port separator (':' or ',')
4247                  */
4248                 s = strchr(*av, ',');
4249                 if (s == NULL) {
4250                         s = strchr(*av, ']');
4251                         /* Prevent erroneous parsing on brackets. */
4252                         if (s != NULL)
4253                                 *(s++) = '\0';
4254                         else
4255                                 s = *av;
4256
4257                         /* Distinguish between IPv4:port and IPv6 cases. */
4258                         s = strchr(s, ':');
4259                         if (s && strchr(s+1, ':'))
4260                                 s = NULL; /* no port */
4261                 }
4262
4263                 if (s != NULL) {
4264                         /* Terminate host portion and set s to start of port. */
4265                         *(s++) = '\0';
4266                         i = strtoport(s, &end, 0 /* base */, 0 /* proto */);
4267                         if (s == end)
4268                                 errx(EX_DATAERR,
4269                                     "illegal forwarding port ``%s''", s);
4270                         port_number = (u_short)i;
4271                 }
4272
4273                 /*
4274                  * Resolve the host name or address to a family and a
4275                  * network representation of the address.
4276                  */
4277                 if (getaddrinfo(*av, NULL, NULL, &res))
4278                         errx(EX_DATAERR, NULL);
4279                 /* Just use the first host in the answer. */
4280                 family = res->ai_family;
4281                 memcpy(&result, res->ai_addr, res->ai_addrlen);
4282                 freeaddrinfo(res);
4283
4284                 if (family == PF_INET) {
4285                         ipfw_insn_sa *p = (ipfw_insn_sa *)action;
4286
4287                         action->opcode = O_FORWARD_IP;
4288                         action->len = F_INSN_SIZE(ipfw_insn_sa);
4289                         CHECK_ACTLEN;
4290
4291                         /*
4292                          * In the kernel we assume AF_INET and use only
4293                          * sin_port and sin_addr. Remember to set sin_len as
4294                          * the routing code seems to use it too.
4295                          */
4296                         p->sa.sin_len = sizeof(struct sockaddr_in);
4297                         p->sa.sin_family = AF_INET;
4298                         p->sa.sin_port = port_number;
4299                         p->sa.sin_addr.s_addr =
4300                              ((struct sockaddr_in *)&result)->sin_addr.s_addr;
4301                 } else if (family == PF_INET6) {
4302                         ipfw_insn_sa6 *p = (ipfw_insn_sa6 *)action;
4303
4304                         action->opcode = O_FORWARD_IP6;
4305                         action->len = F_INSN_SIZE(ipfw_insn_sa6);
4306                         CHECK_ACTLEN;
4307
4308                         p->sa.sin6_len = sizeof(struct sockaddr_in6);
4309                         p->sa.sin6_family = AF_INET6;
4310                         p->sa.sin6_port = port_number;
4311                         p->sa.sin6_flowinfo = 0;
4312                         p->sa.sin6_scope_id =
4313                             ((struct sockaddr_in6 *)&result)->sin6_scope_id;
4314                         bcopy(&((struct sockaddr_in6*)&result)->sin6_addr,
4315                             &p->sa.sin6_addr, sizeof(p->sa.sin6_addr));
4316                 } else {
4317                         errx(EX_DATAERR, "Invalid address family in forward action");
4318                 }
4319                 av++;
4320                 break;
4321             }
4322         case TOK_COMMENT:
4323                 /* pretend it is a 'count' rule followed by the comment */
4324                 action->opcode = O_COUNT;
4325                 av--;           /* go back... */
4326                 break;
4327
4328         case TOK_SETFIB:
4329             {
4330                 int numfibs;
4331                 size_t intsize = sizeof(int);
4332
4333                 action->opcode = O_SETFIB;
4334                 NEED1("missing fib number");
4335                 if (_substrcmp(*av, "tablearg") == 0) {
4336                         action->arg1 = IP_FW_TARG;
4337                 } else {
4338                         action->arg1 = strtoul(*av, NULL, 10);
4339                         if (sysctlbyname("net.fibs", &numfibs, &intsize,
4340                             NULL, 0) == -1)
4341                                 errx(EX_DATAERR, "fibs not supported.\n");
4342                         if (action->arg1 >= numfibs)  /* Temporary */
4343                                 errx(EX_DATAERR, "fib too large.\n");
4344                         /* Add high-order bit to fib to make room for tablearg*/
4345                         action->arg1 |= 0x8000;
4346                 }
4347                 av++;
4348                 break;
4349             }
4350
4351         case TOK_SETDSCP:
4352             {
4353                 int code;
4354
4355                 action->opcode = O_SETDSCP;
4356                 NEED1("missing DSCP code");
4357                 if (_substrcmp(*av, "tablearg") == 0) {
4358                         action->arg1 = IP_FW_TARG;
4359                 } else {
4360                         if (isalpha(*av[0])) {
4361                                 if ((code = match_token(f_ipdscp, *av)) == -1)
4362                                         errx(EX_DATAERR, "Unknown DSCP code");
4363                                 action->arg1 = code;
4364                         } else
4365                                 action->arg1 = strtoul(*av, NULL, 10);
4366                         /*
4367                          * Add high-order bit to DSCP to make room
4368                          * for tablearg
4369                          */
4370                         action->arg1 |= 0x8000;
4371                 }
4372                 av++;
4373                 break;
4374             }
4375
4376         case TOK_REASS:
4377                 action->opcode = O_REASS;
4378                 break;
4379
4380         case TOK_RETURN:
4381                 fill_cmd(action, O_CALLRETURN, F_NOT, 0);
4382                 break;
4383
4384         case TOK_SETMARK: {
4385                 action->opcode = O_SETMARK;
4386                 action->len = F_INSN_SIZE(ipfw_insn_u32);
4387                 NEED1("missing mark");
4388                 if (strcmp(*av, "tablearg") == 0) {
4389                         action->arg1 = IP_FW_TARG;
4390                 } else {
4391                         ((ipfw_insn_u32 *)action)->d[0] =
4392                             strtoul(*av, NULL, 0);
4393                         /* This is not a tablearg */
4394                         action->arg1 |= 0x8000;
4395                 }
4396                 av++;
4397                 CHECK_CMDLEN;
4398                 break;
4399         }
4400
4401         case TOK_TCPSETMSS: {
4402                 u_long mss;
4403                 uint16_t idx;
4404
4405                 idx = pack_object(tstate, "tcp-setmss", IPFW_TLV_EACTION);
4406                 if (idx == 0)
4407                         errx(EX_DATAERR, "pack_object failed");
4408                 fill_cmd(action, O_EXTERNAL_ACTION, 0, idx);
4409                 NEED1("Missing MSS value");
4410                 action = next_cmd(action, &ablen);
4411                 action->len = 1;
4412                 CHECK_ACTLEN;
4413                 mss = strtoul(*av, NULL, 10);
4414                 if (mss == 0 || mss > UINT16_MAX)
4415                         errx(EX_USAGE, "invalid MSS value %s", *av);
4416                 fill_cmd(action, O_EXTERNAL_DATA, 0, (uint16_t)mss);
4417                 av++;
4418                 break;
4419         }
4420
4421         default:
4422                 av--;
4423                 if (match_token(rule_eactions, *av) == -1)
4424                         errx(EX_DATAERR, "invalid action %s\n", *av);
4425                 /*
4426                  * External actions support.
4427                  * XXX: we support only syntax with instance name.
4428                  *      For known external actions (from rule_eactions list)
4429                  *      we can handle syntax directly. But with `eaction'
4430                  *      keyword we can use only `eaction <name> <instance>'
4431                  *      syntax.
4432                  */
4433         case TOK_EACTION: {
4434                 uint16_t idx;
4435
4436                 NEED1("Missing eaction name");
4437                 if (eaction_check_name(*av) != 0)
4438                         errx(EX_DATAERR, "Invalid eaction name %s", *av);
4439                 idx = pack_object(tstate, *av, IPFW_TLV_EACTION);
4440                 if (idx == 0)
4441                         errx(EX_DATAERR, "pack_object failed");
4442                 fill_cmd(action, O_EXTERNAL_ACTION, 0, idx);
4443                 av++;
4444                 NEED1("Missing eaction instance name");
4445                 action = next_cmd(action, &ablen);
4446                 action->len = 1;
4447                 CHECK_ACTLEN;
4448                 if (eaction_check_name(*av) != 0)
4449                         errx(EX_DATAERR, "Invalid eaction instance name %s",
4450                             *av);
4451                 /*
4452                  * External action instance object has TLV type depended
4453                  * from the external action name object index. Since we
4454                  * currently don't know this index, use zero as TLV type.
4455                  */
4456                 idx = pack_object(tstate, *av, 0);
4457                 if (idx == 0)
4458                         errx(EX_DATAERR, "pack_object failed");
4459                 fill_cmd(action, O_EXTERNAL_INSTANCE, 0, idx);
4460                 av++;
4461                 }
4462         }
4463         action = next_cmd(action, &ablen);
4464
4465         /*
4466          * [altq queuename] -- altq tag, optional
4467          * [log [logamount N]]  -- log, optional
4468          *
4469          * If they exist, it go first in the cmdbuf, but then it is
4470          * skipped in the copy section to the end of the buffer.
4471          */
4472         while (av[0] != NULL && (i = match_token(rule_action_params, *av)) != -1) {
4473                 av++;
4474                 switch (i) {
4475                 case TOK_LOG:
4476                     {
4477                         ipfw_insn_log *c = (ipfw_insn_log *)cmd;
4478                         int l;
4479
4480                         if (have_log)
4481                                 errx(EX_DATAERR,
4482                                     "log cannot be specified more than once");
4483                         have_log = (ipfw_insn *)c;
4484                         cmd->len = F_INSN_SIZE(ipfw_insn_log);
4485                         CHECK_CMDLEN;
4486                         cmd->opcode = O_LOG;
4487                         if (av[0] && _substrcmp(*av, "logamount") == 0) {
4488                                 av++;
4489                                 NEED1("logamount requires argument");
4490                                 l = atoi(*av);
4491                                 if (l < 0)
4492                                         errx(EX_DATAERR,
4493                                             "logamount must be positive");
4494                                 c->max_log = l;
4495                                 av++;
4496                         } else {
4497                                 len = sizeof(c->max_log);
4498                                 if (sysctlbyname("net.inet.ip.fw.verbose_limit",
4499                                     &c->max_log, &len, NULL, 0) == -1) {
4500                                         if (g_co.test_only) {
4501                                                 c->max_log = 0;
4502                                                 break;
4503                                         }
4504                                         errx(1, "sysctlbyname(\"%s\")",
4505                                             "net.inet.ip.fw.verbose_limit");
4506                                 }
4507                         }
4508                     }
4509                         break;
4510
4511 #ifndef NO_ALTQ
4512                 case TOK_ALTQ:
4513                     {
4514                         ipfw_insn_altq *a = (ipfw_insn_altq *)cmd;
4515
4516                         NEED1("missing altq queue name");
4517                         if (have_altq)
4518                                 errx(EX_DATAERR,
4519                                     "altq cannot be specified more than once");
4520                         have_altq = (ipfw_insn *)a;
4521                         cmd->len = F_INSN_SIZE(ipfw_insn_altq);
4522                         CHECK_CMDLEN;
4523                         cmd->opcode = O_ALTQ;
4524                         a->qid = altq_name_to_qid(*av);
4525                         av++;
4526                     }
4527                         break;
4528 #endif
4529
4530                 case TOK_TAG:
4531                 case TOK_UNTAG: {
4532                         uint16_t tag;
4533
4534                         if (have_tag)
4535                                 errx(EX_USAGE, "tag and untag cannot be "
4536                                     "specified more than once");
4537                         GET_UINT_ARG(tag, IPFW_ARG_MIN, IPFW_ARG_MAX, i,
4538                            rule_action_params);
4539                         have_tag = cmd;
4540                         fill_cmd(cmd, O_TAG, (i == TOK_TAG) ? 0: F_NOT, tag);
4541                         av++;
4542                         break;
4543                 }
4544
4545                 default:
4546                         abort();
4547                 }
4548                 cmd = next_cmd(cmd, &cblen);
4549         }
4550
4551         if (have_state) { /* must be a check-state, we are done */
4552                 if (*av != NULL &&
4553                     match_token(rule_options, *av) == TOK_COMMENT) {
4554                         /* check-state has a comment */
4555                         av++;
4556                         fill_comment(cmd, av, cblen);
4557                         cmd = next_cmd(cmd, &cblen);
4558                         av[0] = NULL;
4559                 }
4560                 goto done;
4561         }
4562
4563 #define OR_START(target)                                        \
4564         if (av[0] && (*av[0] == '(' || *av[0] == '{')) {        \
4565                 if (open_par)                                   \
4566                         errx(EX_USAGE, "nested \"(\" not allowed\n"); \
4567                 prev = NULL;                                    \
4568                 open_par = 1;                                   \
4569                 if ( (av[0])[1] == '\0') {                      \
4570                         av++;                                   \
4571                 } else                                          \
4572                         (*av)++;                                \
4573         }                                                       \
4574         target:                                                 \
4575
4576
4577 #define CLOSE_PAR                                               \
4578         if (open_par) {                                         \
4579                 if (av[0] && (                                  \
4580                     strcmp(*av, ")") == 0 ||                    \
4581                     strcmp(*av, "}") == 0)) {                   \
4582                         prev = NULL;                            \
4583                         open_par = 0;                           \
4584                         av++;                                   \
4585                 } else                                          \
4586                         errx(EX_USAGE, "missing \")\"\n");      \
4587         }
4588
4589 #define NOT_BLOCK                                               \
4590         if (av[0] && _substrcmp(*av, "not") == 0) {             \
4591                 if (cmd->len & F_NOT)                           \
4592                         errx(EX_USAGE, "double \"not\" not allowed\n"); \
4593                 cmd->len |= F_NOT;                              \
4594                 av++;                                           \
4595         }
4596
4597 #define OR_BLOCK(target)                                        \
4598         if (av[0] && _substrcmp(*av, "or") == 0) {              \
4599                 if (prev == NULL || open_par == 0)              \
4600                         errx(EX_DATAERR, "invalid OR block");   \
4601                 prev->len |= F_OR;                              \
4602                 av++;                                   \
4603                 goto target;                                    \
4604         }                                                       \
4605         CLOSE_PAR;
4606
4607         first_cmd = cmd;
4608
4609 #if 0
4610         /*
4611          * MAC addresses, optional.
4612          * If we have this, we skip the part "proto from src to dst"
4613          * and jump straight to the option parsing.
4614          */
4615         NOT_BLOCK;
4616         NEED1("missing protocol");
4617         if (_substrcmp(*av, "MAC") == 0 ||
4618             _substrcmp(*av, "mac") == 0) {
4619                 av++;                   /* the "MAC" keyword */
4620                 add_mac(cmd, av);       /* exits in case of errors */
4621                 cmd = next_cmd(cmd);
4622                 av += 2;                /* dst-mac and src-mac */
4623                 NOT_BLOCK;
4624                 NEED1("missing mac type");
4625                 if (add_mactype(cmd, av[0]))
4626                         cmd = next_cmd(cmd);
4627                 av++;                   /* any or mac-type */
4628                 goto read_options;
4629         }
4630 #endif
4631
4632         /*
4633          * protocol, mandatory
4634          */
4635     OR_START(get_proto);
4636         NOT_BLOCK;
4637         NEED1("missing protocol");
4638         if (add_proto_compat(cmd, *av, &proto)) {
4639                 av++;
4640                 if (F_LEN(cmd) != 0) {
4641                         prev = cmd;
4642                         cmd = next_cmd(cmd, &cblen);
4643                 }
4644         } else if (first_cmd != cmd) {
4645                 errx(EX_DATAERR, "invalid protocol ``%s''", *av);
4646         } else {
4647                 rule->flags |= IPFW_RULE_JUSTOPTS;
4648                 goto read_options;
4649         }
4650     OR_BLOCK(get_proto);
4651
4652         first_cmd = cmd; /* update pointer to use in compact form */
4653
4654         /*
4655          * "from", mandatory
4656          */
4657         if ((av[0] == NULL) || _substrcmp(*av, "from") != 0)
4658                 errx(EX_USAGE, "missing ``from''");
4659         av++;
4660
4661         /*
4662          * source IP, mandatory
4663          */
4664     OR_START(source_ip);
4665         NOT_BLOCK;      /* optional "not" */
4666         NEED1("missing source address");
4667         if (add_src(cmd, *av, proto, cblen, tstate)) {
4668                 av++;
4669                 if (F_LEN(cmd) != 0) {  /* ! any */
4670                         prev = cmd;
4671                         cmd = next_cmd(cmd, &cblen);
4672                 }
4673         } else
4674                 errx(EX_USAGE, "bad source address %s", *av);
4675     OR_BLOCK(source_ip);
4676
4677         /*
4678          * source ports, optional
4679          */
4680         NOT_BLOCK;      /* optional "not" */
4681         if ( av[0] != NULL ) {
4682                 if (_substrcmp(*av, "any") == 0 ||
4683                     add_ports(cmd, *av, proto, O_IP_SRCPORT, cblen)) {
4684                         av++;
4685                         if (F_LEN(cmd) != 0)
4686                                 cmd = next_cmd(cmd, &cblen);
4687                 }
4688         }
4689
4690         /*
4691          * "to", mandatory
4692          */
4693         if ( (av[0] == NULL) || _substrcmp(*av, "to") != 0 )
4694                 errx(EX_USAGE, "missing ``to''");
4695         av++;
4696
4697         /*
4698          * destination, mandatory
4699          */
4700     OR_START(dest_ip);
4701         NOT_BLOCK;      /* optional "not" */
4702         NEED1("missing dst address");
4703         if (add_dst(cmd, *av, proto, cblen, tstate)) {
4704                 av++;
4705                 if (F_LEN(cmd) != 0) {  /* ! any */
4706                         prev = cmd;
4707                         cmd = next_cmd(cmd, &cblen);
4708                 }
4709         } else
4710                 errx( EX_USAGE, "bad destination address %s", *av);
4711     OR_BLOCK(dest_ip);
4712
4713         /*
4714          * dest. ports, optional
4715          */
4716         NOT_BLOCK;      /* optional "not" */
4717         if (av[0]) {
4718                 if (_substrcmp(*av, "any") == 0 ||
4719                     add_ports(cmd, *av, proto, O_IP_DSTPORT, cblen)) {
4720                         av++;
4721                         if (F_LEN(cmd) != 0)
4722                                 cmd = next_cmd(cmd, &cblen);
4723                 }
4724         }
4725         if (first_cmd == cmd)
4726                 rule->flags |= IPFW_RULE_NOOPT;
4727
4728 read_options:
4729         prev = NULL;
4730         while ( av[0] != NULL ) {
4731                 char *s;
4732                 ipfw_insn_u32 *cmd32;   /* alias for cmd */
4733
4734                 s = *av;
4735                 cmd32 = (ipfw_insn_u32 *)cmd;
4736
4737                 if (*s == '!') {        /* alternate syntax for NOT */
4738                         if (cmd->len & F_NOT)
4739                                 errx(EX_USAGE, "double \"not\" not allowed\n");
4740                         cmd->len = F_NOT;
4741                         s++;
4742                 }
4743                 i = match_token(rule_options, s);
4744                 av++;
4745                 switch(i) {
4746                 case TOK_NOT:
4747                         if (cmd->len & F_NOT)
4748                                 errx(EX_USAGE, "double \"not\" not allowed\n");
4749                         cmd->len = F_NOT;
4750                         break;
4751
4752                 case TOK_OR:
4753                         if (open_par == 0 || prev == NULL)
4754                                 errx(EX_USAGE, "invalid \"or\" block\n");
4755                         prev->len |= F_OR;
4756                         break;
4757
4758                 case TOK_STARTBRACE:
4759                         if (open_par)
4760                                 errx(EX_USAGE, "+nested \"(\" not allowed\n");
4761                         open_par = 1;
4762                         break;
4763
4764                 case TOK_ENDBRACE:
4765                         if (!open_par)
4766                                 errx(EX_USAGE, "+missing \")\"\n");
4767                         open_par = 0;
4768                         prev = NULL;
4769                         break;
4770
4771                 case TOK_IN:
4772                         fill_cmd(cmd, O_IN, 0, 0);
4773                         break;
4774
4775                 case TOK_OUT:
4776                         cmd->len ^= F_NOT; /* toggle F_NOT */
4777                         fill_cmd(cmd, O_IN, 0, 0);
4778                         break;
4779
4780                 case TOK_DIVERTED:
4781                         fill_cmd(cmd, O_DIVERTED, 0, 3);
4782                         break;
4783
4784                 case TOK_DIVERTEDLOOPBACK:
4785                         fill_cmd(cmd, O_DIVERTED, 0, 1);
4786                         break;
4787
4788                 case TOK_DIVERTEDOUTPUT:
4789                         fill_cmd(cmd, O_DIVERTED, 0, 2);
4790                         break;
4791
4792                 case TOK_FRAG: {
4793                         uint32_t set = 0, clear = 0;
4794
4795                         if (*av != NULL && fill_flags(f_ipoff, *av, NULL,
4796                             &set, &clear) == 0)
4797                                 av++;
4798                         else {
4799                                 /*
4800                                  * Compatibility: no argument after "frag"
4801                                  * keyword equals to "frag offset".
4802                                  */
4803                                 set = 0x01;
4804                                 clear = 0;
4805                         }
4806                         fill_cmd(cmd, O_FRAG, 0,
4807                             (set & 0xff) | ( (clear & 0xff) << 8));
4808                         break;
4809                 }
4810
4811                 case TOK_LAYER2:
4812                         fill_cmd(cmd, O_LAYER2, 0, 0);
4813                         break;
4814
4815                 case TOK_XMIT:
4816                 case TOK_RECV:
4817                 case TOK_VIA:
4818                         NEED1("recv, xmit, via require interface name"
4819                                 " or address");
4820                         fill_iface((ipfw_insn_if *)cmd, av[0], cblen, tstate);
4821                         av++;
4822                         if (F_LEN(cmd) == 0)    /* not a valid address */
4823                                 break;
4824                         if (i == TOK_XMIT)
4825                                 cmd->opcode = O_XMIT;
4826                         else if (i == TOK_RECV)
4827                                 cmd->opcode = O_RECV;
4828                         else if (i == TOK_VIA)
4829                                 cmd->opcode = O_VIA;
4830                         break;
4831
4832                 case TOK_ICMPTYPES:
4833                         NEED1("icmptypes requires list of types");
4834                         fill_icmptypes((ipfw_insn_u32 *)cmd, *av);
4835                         av++;
4836                         break;
4837
4838                 case TOK_ICMP6TYPES:
4839                         NEED1("icmptypes requires list of types");
4840                         fill_icmp6types((ipfw_insn_icmp6 *)cmd, *av, cblen);
4841                         av++;
4842                         break;
4843
4844                 case TOK_IPTTL:
4845                         NEED1("ipttl requires TTL");
4846                         if (strpbrk(*av, "-,")) {
4847                             if (!add_ports(cmd, *av, 0, O_IPTTL, cblen))
4848                                 errx(EX_DATAERR, "invalid ipttl %s", *av);
4849                         } else
4850                             fill_cmd(cmd, O_IPTTL, 0, strtoul(*av, NULL, 0));
4851                         av++;
4852                         break;
4853
4854                 case TOK_IPID:
4855                         NEED1("ipid requires id");
4856                         if (strpbrk(*av, "-,")) {
4857                             if (!add_ports(cmd, *av, 0, O_IPID, cblen))
4858                                 errx(EX_DATAERR, "invalid ipid %s", *av);
4859                         } else
4860                             fill_cmd(cmd, O_IPID, 0, strtoul(*av, NULL, 0));
4861                         av++;
4862                         break;
4863
4864                 case TOK_IPLEN:
4865                         NEED1("iplen requires length");
4866                         if (strpbrk(*av, "-,")) {
4867                             if (!add_ports(cmd, *av, 0, O_IPLEN, cblen))
4868                                 errx(EX_DATAERR, "invalid ip len %s", *av);
4869                         } else
4870                             fill_cmd(cmd, O_IPLEN, 0, strtoul(*av, NULL, 0));
4871                         av++;
4872                         break;
4873
4874                 case TOK_IPVER:
4875                         NEED1("ipver requires version");
4876                         fill_cmd(cmd, O_IPVER, 0, strtoul(*av, NULL, 0));
4877                         av++;
4878                         break;
4879
4880                 case TOK_IPPRECEDENCE:
4881                         NEED1("ipprecedence requires value");
4882                         fill_cmd(cmd, O_IPPRECEDENCE, 0,
4883                             (strtoul(*av, NULL, 0) & 7) << 5);
4884                         av++;
4885                         break;
4886
4887                 case TOK_DSCP:
4888                         NEED1("missing DSCP code");
4889                         fill_dscp(cmd, *av, cblen);
4890                         av++;
4891                         break;
4892
4893                 case TOK_IPOPTS:
4894                         NEED1("missing argument for ipoptions");
4895                         fill_flags_cmd(cmd, O_IPOPT, f_ipopts, *av);
4896                         av++;
4897                         break;
4898
4899                 case TOK_IPTOS:
4900                         NEED1("missing argument for iptos");
4901                         fill_flags_cmd(cmd, O_IPTOS, f_iptos, *av);
4902                         av++;
4903                         break;
4904
4905                 case TOK_UID:
4906                         NEED1("uid requires argument");
4907                     {
4908                         char *end;
4909                         uid_t uid;
4910                         struct passwd *pwd;
4911
4912                         cmd->opcode = O_UID;
4913                         uid = strtoul(*av, &end, 0);
4914                         pwd = (*end == '\0') ? getpwuid(uid) : getpwnam(*av);
4915                         if (pwd == NULL)
4916                                 errx(EX_DATAERR, "uid \"%s\" nonexistent", *av);
4917                         cmd32->d[0] = pwd->pw_uid;
4918                         cmd->len |= F_INSN_SIZE(ipfw_insn_u32);
4919                         av++;
4920                     }
4921                         break;
4922
4923                 case TOK_GID:
4924                         NEED1("gid requires argument");
4925                     {
4926                         char *end;
4927                         gid_t gid;
4928                         struct group *grp;
4929
4930                         cmd->opcode = O_GID;
4931                         gid = strtoul(*av, &end, 0);
4932                         grp = (*end == '\0') ? getgrgid(gid) : getgrnam(*av);
4933                         if (grp == NULL)
4934                                 errx(EX_DATAERR, "gid \"%s\" nonexistent", *av);
4935                         cmd32->d[0] = grp->gr_gid;
4936                         cmd->len |= F_INSN_SIZE(ipfw_insn_u32);
4937                         av++;
4938                     }
4939                         break;
4940
4941                 case TOK_JAIL:
4942                         NEED1("jail requires argument");
4943                     {
4944                         char *end;
4945                         int jid;
4946
4947                         cmd->opcode = O_JAIL;
4948                         /*
4949                          * If av is a number, then we'll just pass it as-is.  If
4950                          * it's a name, try to resolve that to a jid.
4951                          *
4952                          * We save the jail_getid(3) call for a fallback because
4953                          * it entails an unconditional trip to the kernel to
4954                          * either validate a jid or resolve a name to a jid.
4955                          * This specific token doesn't currently require a
4956                          * jid to be an active jail, so we save a transition
4957                          * by simply using a number that we're given.
4958                          */
4959                         jid = strtoul(*av, &end, 10);
4960                         if (*end != '\0') {
4961                                 jid = jail_getid(*av);
4962                                 if (jid < 0)
4963                                     errx(EX_DATAERR, "%s", jail_errmsg);
4964                         }
4965                         cmd32->d[0] = (uint32_t)jid;
4966                         cmd->len |= F_INSN_SIZE(ipfw_insn_u32);
4967                         av++;
4968                     }
4969                         break;
4970
4971                 case TOK_ESTAB:
4972                         fill_cmd(cmd, O_ESTAB, 0, 0);
4973                         break;
4974
4975                 case TOK_SETUP:
4976                         fill_cmd(cmd, O_TCPFLAGS, 0,
4977                                 (TH_SYN) | ( (TH_ACK) & 0xff) <<8 );
4978                         break;
4979
4980                 case TOK_TCPDATALEN:
4981                         NEED1("tcpdatalen requires length");
4982                         if (strpbrk(*av, "-,")) {
4983                             if (!add_ports(cmd, *av, 0, O_TCPDATALEN, cblen))
4984                                 errx(EX_DATAERR, "invalid tcpdata len %s", *av);
4985                         } else
4986                             fill_cmd(cmd, O_TCPDATALEN, 0,
4987                                     strtoul(*av, NULL, 0));
4988                         av++;
4989                         break;
4990
4991                 case TOK_TCPOPTS:
4992                         NEED1("missing argument for tcpoptions");
4993                         fill_flags_cmd(cmd, O_TCPOPTS, f_tcpopts, *av);
4994                         av++;
4995                         break;
4996
4997                 case TOK_TCPSEQ:
4998                 case TOK_TCPACK:
4999                         NEED1("tcpseq/tcpack requires argument");
5000                         cmd->len = F_INSN_SIZE(ipfw_insn_u32);
5001                         cmd->opcode = (i == TOK_TCPSEQ) ? O_TCPSEQ : O_TCPACK;
5002                         cmd32->d[0] = htonl(strtoul(*av, NULL, 0));
5003                         av++;
5004                         break;
5005
5006                 case TOK_TCPMSS:
5007                 case TOK_TCPWIN:
5008                         NEED1("tcpmss/tcpwin requires size");
5009                         if (strpbrk(*av, "-,")) {
5010                                 if (add_ports(cmd, *av, 0,
5011                                     i == TOK_TCPWIN ? O_TCPWIN : O_TCPMSS,
5012                                     cblen) == NULL)
5013                                         errx(EX_DATAERR, "invalid %s size %s",
5014                                             s, *av);
5015                         } else
5016                                 fill_cmd(cmd, i == TOK_TCPWIN ? O_TCPWIN :
5017                                     O_TCPMSS, 0, strtoul(*av, NULL, 0));
5018                         av++;
5019                         break;
5020
5021                 case TOK_TCPFLAGS:
5022                         NEED1("missing argument for tcpflags");
5023                         cmd->opcode = O_TCPFLAGS;
5024                         fill_flags_cmd(cmd, O_TCPFLAGS, f_tcpflags, *av);
5025                         av++;
5026                         break;
5027
5028                 case TOK_KEEPSTATE:
5029                 case TOK_RECORDSTATE: {
5030                         uint16_t uidx;
5031
5032                         if (open_par)
5033                                 errx(EX_USAGE, "keep-state or record-state cannot be part "
5034                                     "of an or block");
5035                         if (have_state)
5036                                 errx(EX_USAGE, "only one of keep-state, record-state, "
5037                                         " limit and set-limit is allowed");
5038                         if (*av != NULL && *av[0] == ':') {
5039                                 if (state_check_name(*av + 1) != 0)
5040                                         errx(EX_DATAERR,
5041                                             "Invalid state name %s", *av);
5042                                 uidx = pack_object(tstate, *av + 1,
5043                                     IPFW_TLV_STATE_NAME);
5044                                 av++;
5045                         } else
5046                                 uidx = pack_object(tstate, default_state_name,
5047                                     IPFW_TLV_STATE_NAME);
5048                         have_state = cmd;
5049                         have_rstate = i == TOK_RECORDSTATE;
5050                         fill_cmd(cmd, O_KEEP_STATE, 0, uidx);
5051                         break;
5052                 }
5053
5054                 case TOK_LIMIT:
5055                 case TOK_SETLIMIT: {
5056                         ipfw_insn_limit *c = (ipfw_insn_limit *)cmd;
5057                         int val;
5058
5059                         if (open_par)
5060                                 errx(EX_USAGE,
5061                                     "limit or set-limit cannot be part of an or block");
5062                         if (have_state)
5063                                 errx(EX_USAGE, "only one of keep-state, record-state, "
5064                                         " limit and set-limit is allowed");
5065                         have_state = cmd;
5066                         have_rstate = i == TOK_SETLIMIT;
5067
5068                         cmd->len = F_INSN_SIZE(ipfw_insn_limit);
5069                         CHECK_CMDLEN;
5070                         cmd->opcode = O_LIMIT;
5071                         c->limit_mask = c->conn_limit = 0;
5072
5073                         while ( av[0] != NULL ) {
5074                                 if ((val = match_token(limit_masks, *av)) <= 0)
5075                                         break;
5076                                 c->limit_mask |= val;
5077                                 av++;
5078                         }
5079
5080                         if (c->limit_mask == 0)
5081                                 errx(EX_USAGE, "limit: missing limit mask");
5082
5083                         GET_UINT_ARG(c->conn_limit, IPFW_ARG_MIN, IPFW_ARG_MAX,
5084                             TOK_LIMIT, rule_options);
5085                         av++;
5086
5087                         if (*av != NULL && *av[0] == ':') {
5088                                 if (state_check_name(*av + 1) != 0)
5089                                         errx(EX_DATAERR,
5090                                             "Invalid state name %s", *av);
5091                                 cmd->arg1 = pack_object(tstate, *av + 1,
5092                                     IPFW_TLV_STATE_NAME);
5093                                 av++;
5094                         } else
5095                                 cmd->arg1 = pack_object(tstate,
5096                                     default_state_name, IPFW_TLV_STATE_NAME);
5097                         break;
5098                 }
5099
5100                 case TOK_PROTO:
5101                         NEED1("missing protocol");
5102                         if (add_proto(cmd, *av, &proto)) {
5103                                 av++;
5104                         } else
5105                                 errx(EX_DATAERR, "invalid protocol ``%s''",
5106                                     *av);
5107                         break;
5108
5109                 case TOK_SRCIP:
5110                         NEED1("missing source IP");
5111                         if (add_srcip(cmd, *av, cblen, tstate)) {
5112                                 av++;
5113                         }
5114                         break;
5115
5116                 case TOK_DSTIP:
5117                         NEED1("missing destination IP");
5118                         if (add_dstip(cmd, *av, cblen, tstate)) {
5119                                 av++;
5120                         }
5121                         break;
5122
5123                 case TOK_SRCIP6:
5124                         NEED1("missing source IP6");
5125                         if (add_srcip6(cmd, *av, cblen, tstate)) {
5126                                 av++;
5127                         }
5128                         break;
5129
5130                 case TOK_DSTIP6:
5131                         NEED1("missing destination IP6");
5132                         if (add_dstip6(cmd, *av, cblen, tstate)) {
5133                                 av++;
5134                         }
5135                         break;
5136
5137
5138                 case TOK_SRCMAC:
5139                         NEED1("missing source MAC");
5140                         if (add_srcmac(cmd, *av, tstate)) {
5141                                 av++;
5142                         }
5143                         break;
5144
5145                 case TOK_DSTMAC:
5146                         NEED1("missing destination MAC");
5147                         if (add_dstmac(cmd, *av, tstate)) {
5148                                 av++;
5149                         }
5150                         break;
5151
5152                 case TOK_SRCPORT:
5153                         NEED1("missing source port");
5154                         if (_substrcmp(*av, "any") == 0 ||
5155                             add_ports(cmd, *av, proto, O_IP_SRCPORT, cblen)) {
5156                                 av++;
5157                         } else
5158                                 errx(EX_DATAERR, "invalid source port %s", *av);
5159                         break;
5160
5161                 case TOK_DSTPORT:
5162                         NEED1("missing destination port");
5163                         if (_substrcmp(*av, "any") == 0 ||
5164                             add_ports(cmd, *av, proto, O_IP_DSTPORT, cblen)) {
5165                                 av++;
5166                         } else
5167                                 errx(EX_DATAERR, "invalid destination port %s",
5168                                     *av);
5169                         break;
5170
5171                 case TOK_MAC:
5172                         if (add_mac(cmd, av, cblen))
5173                                 av += 2;
5174                         break;
5175
5176                 case TOK_MACTYPE:
5177                         NEED1("missing mac type");
5178                         if (!add_mactype(cmd, *av, cblen))
5179                                 errx(EX_DATAERR, "invalid mac type %s", *av);
5180                         av++;
5181                         break;
5182
5183                 case TOK_VERREVPATH:
5184                         fill_cmd(cmd, O_VERREVPATH, 0, 0);
5185                         break;
5186
5187                 case TOK_VERSRCREACH:
5188                         fill_cmd(cmd, O_VERSRCREACH, 0, 0);
5189                         break;
5190
5191                 case TOK_ANTISPOOF:
5192                         fill_cmd(cmd, O_ANTISPOOF, 0, 0);
5193                         break;
5194
5195                 case TOK_IPSEC:
5196                         fill_cmd(cmd, O_IPSEC, 0, 0);
5197                         break;
5198
5199                 case TOK_IPV6:
5200                         fill_cmd(cmd, O_IP6, 0, 0);
5201                         break;
5202
5203                 case TOK_IPV4:
5204                         fill_cmd(cmd, O_IP4, 0, 0);
5205                         break;
5206
5207                 case TOK_EXT6HDR:
5208                         NEED1("missing extension header");
5209                         fill_ext6hdr( cmd, *av );
5210                         av++;
5211                         break;
5212
5213                 case TOK_FLOWID:
5214                         if (proto != IPPROTO_IPV6 )
5215                                 errx( EX_USAGE, "flow-id filter is active "
5216                                     "only for ipv6 protocol\n");
5217                         fill_flow6( (ipfw_insn_u32 *) cmd, *av, cblen);
5218                         av++;
5219                         break;
5220
5221                 case TOK_COMMENT:
5222                         fill_comment(cmd, av, cblen);
5223                         av[0]=NULL;
5224                         break;
5225
5226                 case TOK_TAGGED:
5227                         if (av[0] && strpbrk(*av, "-,")) {
5228                                 if (!add_ports(cmd, *av, 0, O_TAGGED, cblen))
5229                                         errx(EX_DATAERR, "tagged: invalid tag"
5230                                             " list: %s", *av);
5231                         }
5232                         else {
5233                                 uint16_t tag;
5234
5235                                 GET_UINT_ARG(tag, IPFW_ARG_MIN, IPFW_ARG_MAX,
5236                                     TOK_TAGGED, rule_options);
5237                                 fill_cmd(cmd, O_TAGGED, 0, tag);
5238                         }
5239                         av++;
5240                         break;
5241
5242                 case TOK_FIB:
5243                         NEED1("fib requires fib number");
5244                         fill_cmd(cmd, O_FIB, 0, strtoul(*av, NULL, 0));
5245                         av++;
5246                         break;
5247                 case TOK_SOCKARG:
5248                         fill_cmd(cmd, O_SOCKARG, 0, 0);
5249                         break;
5250
5251                 case TOK_LOOKUP: {
5252                         ipfw_insn_u32 *c = (ipfw_insn_u32 *)cmd;
5253
5254                         if (!av[0] || !av[1])
5255                                 errx(EX_USAGE, "format: lookup argument tablenum");
5256                         cmd->opcode = O_IP_DST_LOOKUP;
5257                         cmd->len |= F_INSN_SIZE(ipfw_insn) + 2;
5258                         i = match_token(lookup_keys, *av);
5259                         if (i == -1)
5260                                 errx(EX_USAGE, "format: cannot lookup on %s", *av);
5261                         __PAST_END(c->d, 1) = i;
5262                         av++;
5263
5264                         if ((i = pack_table(tstate, *av)) == 0)
5265                                 errx(EX_DATAERR, "Invalid table name: %s", *av);
5266
5267                         cmd->arg1 = i;
5268                         av++;
5269                         }
5270                         break;
5271                 case TOK_FLOW:
5272                         NEED1("missing table name");
5273                         if (strncmp(*av, "table(", 6) != 0)
5274                                 errx(EX_DATAERR,
5275                                     "enclose table name into \"table()\"");
5276                         fill_table(cmd, *av, O_IP_FLOW_LOOKUP, tstate);
5277                         av++;
5278                         break;
5279
5280                 case TOK_SKIPACTION:
5281                         if (have_skipcmd)
5282                                 errx(EX_USAGE, "only one defer-action "
5283                                         "is allowed");
5284                         have_skipcmd = cmd;
5285                         fill_cmd(cmd, O_SKIP_ACTION, 0, 0);
5286                         break;
5287
5288                 case TOK_MARK:
5289                         NEED1("missing mark value:mask");
5290                         fill_mark(cmd, *av, cblen);
5291                         av++;
5292                         break;
5293
5294                 default:
5295                         errx(EX_USAGE, "unrecognised option [%d] %s\n", i, s);
5296                 }
5297                 if (F_LEN(cmd) > 0) {   /* prepare to advance */
5298                         prev = cmd;
5299                         cmd = next_cmd(cmd, &cblen);
5300                 }
5301         }
5302
5303 done:
5304
5305         if (!have_state && have_skipcmd)
5306                 warnx("Rule contains \"defer-immediate-action\" "
5307                         "and doesn't contain any state-related options.");
5308
5309         /*
5310          * Now copy stuff into the rule.
5311          * If we have a keep-state option, the first instruction
5312          * must be a PROBE_STATE (which is generated here).
5313          * If we have a LOG option, it was stored as the first command,
5314          * and now must be moved to the top of the action part.
5315          */
5316         dst = (ipfw_insn *)rule->cmd;
5317
5318         /*
5319          * First thing to write into the command stream is the match probability.
5320          */
5321         if (match_prob != 1) { /* 1 means always match */
5322                 dst->opcode = O_PROB;
5323                 dst->len = 2;
5324                 *((int32_t *)(dst+1)) = (int32_t)(match_prob * 0x7fffffff);
5325                 dst += dst->len;
5326         }
5327
5328         /*
5329          * generate O_PROBE_STATE if necessary
5330          */
5331         if (have_state && have_state->opcode != O_CHECK_STATE && !have_rstate) {
5332                 fill_cmd(dst, O_PROBE_STATE, 0, have_state->arg1);
5333                 dst = next_cmd(dst, &rblen);
5334         }
5335
5336         /*
5337          * copy all commands but O_LOG, O_KEEP_STATE, O_LIMIT, O_ALTQ, O_TAG,
5338          * O_SKIP_ACTION
5339          */
5340         for (src = (ipfw_insn *)cmdbuf; src != cmd; src += i) {
5341                 i = F_LEN(src);
5342                 CHECK_RBUFLEN(i);
5343
5344                 switch (src->opcode) {
5345                 case O_LOG:
5346                 case O_KEEP_STATE:
5347                 case O_LIMIT:
5348                 case O_ALTQ:
5349                 case O_TAG:
5350                 case O_SKIP_ACTION:
5351                         break;
5352                 default:
5353                         bcopy(src, dst, i * sizeof(uint32_t));
5354                         dst += i;
5355                 }
5356         }
5357
5358         /*
5359          * put back the have_state command as last opcode
5360          */
5361         if (have_state && have_state->opcode != O_CHECK_STATE) {
5362                 i = F_LEN(have_state);
5363                 CHECK_RBUFLEN(i);
5364                 bcopy(have_state, dst, i * sizeof(uint32_t));
5365                 dst += i;
5366         }
5367
5368         /*
5369          * put back the have_skipcmd command as very last opcode
5370          */
5371         if (have_skipcmd) {
5372                 i = F_LEN(have_skipcmd);
5373                 CHECK_RBUFLEN(i);
5374                 bcopy(have_skipcmd, dst, i * sizeof(uint32_t));
5375                 dst += i;
5376         }
5377
5378         /*
5379          * start action section
5380          */
5381         rule->act_ofs = dst - rule->cmd;
5382
5383         /* put back O_LOG, O_ALTQ, O_TAG if necessary */
5384         if (have_log) {
5385                 i = F_LEN(have_log);
5386                 CHECK_RBUFLEN(i);
5387                 bcopy(have_log, dst, i * sizeof(uint32_t));
5388                 dst += i;
5389         }
5390         if (have_altq) {
5391                 i = F_LEN(have_altq);
5392                 CHECK_RBUFLEN(i);
5393                 bcopy(have_altq, dst, i * sizeof(uint32_t));
5394                 dst += i;
5395         }
5396         if (have_tag) {
5397                 i = F_LEN(have_tag);
5398                 CHECK_RBUFLEN(i);
5399                 bcopy(have_tag, dst, i * sizeof(uint32_t));
5400                 dst += i;
5401         }
5402
5403         /*
5404          * copy all other actions
5405          */
5406         for (src = (ipfw_insn *)actbuf; src != action; src += i) {
5407                 i = F_LEN(src);
5408                 CHECK_RBUFLEN(i);
5409                 bcopy(src, dst, i * sizeof(uint32_t));
5410                 dst += i;
5411         }
5412
5413         rule->cmd_len = (uint32_t *)dst - (uint32_t *)(rule->cmd);
5414         *rbufsize = (char *)dst - (char *)rule;
5415 }
5416
5417 static int
5418 compare_ntlv(const void *_a, const void *_b)
5419 {
5420         const ipfw_obj_ntlv *a, *b;
5421
5422         a = (const ipfw_obj_ntlv *)_a;
5423         b = (const ipfw_obj_ntlv *)_b;
5424
5425         if (a->set < b->set)
5426                 return (-1);
5427         else if (a->set > b->set)
5428                 return (1);
5429
5430         if (a->idx < b->idx)
5431                 return (-1);
5432         else if (a->idx > b->idx)
5433                 return (1);
5434
5435         if (a->head.type < b->head.type)
5436                 return (-1);
5437         else if (a->head.type > b->head.type)
5438                 return (1);
5439
5440         return (0);
5441 }
5442
5443 /*
5444  * Provide kernel with sorted list of referenced objects
5445  */
5446 static void
5447 object_sort_ctlv(ipfw_obj_ctlv *ctlv)
5448 {
5449
5450         qsort(ctlv + 1, ctlv->count, ctlv->objsize, compare_ntlv);
5451 }
5452
5453 struct object_kt {
5454         uint16_t        uidx;
5455         uint16_t        type;
5456 };
5457 static int
5458 compare_object_kntlv(const void *k, const void *v)
5459 {
5460         const ipfw_obj_ntlv *ntlv;
5461         struct object_kt key;
5462
5463         key = *((const struct object_kt *)k);
5464         ntlv = (const ipfw_obj_ntlv *)v;
5465
5466         if (key.uidx < ntlv->idx)
5467                 return (-1);
5468         else if (key.uidx > ntlv->idx)
5469                 return (1);
5470
5471         if (key.type < ntlv->head.type)
5472                 return (-1);
5473         else if (key.type > ntlv->head.type)
5474                 return (1);
5475
5476         return (0);
5477 }
5478
5479 /*
5480  * Finds object name in @ctlv by @idx and @type.
5481  * Uses the following facts:
5482  * 1) All TLVs are the same size
5483  * 2) Kernel implementation provides already sorted list.
5484  *
5485  * Returns table name or NULL.
5486  */
5487 static char *
5488 object_search_ctlv(ipfw_obj_ctlv *ctlv, uint16_t idx, uint16_t type)
5489 {
5490         ipfw_obj_ntlv *ntlv;
5491         struct object_kt key;
5492
5493         key.uidx = idx;
5494         key.type = type;
5495
5496         ntlv = bsearch(&key, (ctlv + 1), ctlv->count, ctlv->objsize,
5497             compare_object_kntlv);
5498
5499         if (ntlv != NULL)
5500                 return (ntlv->name);
5501
5502         return (NULL);
5503 }
5504
5505 static char *
5506 table_search_ctlv(ipfw_obj_ctlv *ctlv, uint16_t idx)
5507 {
5508
5509         return (object_search_ctlv(ctlv, idx, IPFW_TLV_TBL_NAME));
5510 }
5511
5512 /*
5513  * Adds one or more rules to ipfw chain.
5514  * Data layout:
5515  * Request:
5516  * [
5517  *   ip_fw3_opheader
5518  *   [ ipfw_obj_ctlv(IPFW_TLV_TBL_LIST) ipfw_obj_ntlv x N ] (optional *1)
5519  *   [ ipfw_obj_ctlv(IPFW_TLV_RULE_LIST) [ ip_fw_rule ip_fw_insn ] x N ] (*2) (*3)
5520  * ]
5521  * Reply:
5522  * [
5523  *   ip_fw3_opheader
5524  *   [ ipfw_obj_ctlv(IPFW_TLV_TBL_LIST) ipfw_obj_ntlv x N ] (optional)
5525  *   [ ipfw_obj_ctlv(IPFW_TLV_RULE_LIST) [ ip_fw_rule ip_fw_insn ] x N ]
5526  * ]
5527  *
5528  * Rules in reply are modified to store their actual ruleset number.
5529  *
5530  * (*1) TLVs inside IPFW_TLV_TBL_LIST needs to be sorted ascending
5531  * according to their idx field and there has to be no duplicates.
5532  * (*2) Numbered rules inside IPFW_TLV_RULE_LIST needs to be sorted ascending.
5533  * (*3) Each ip_fw structure needs to be aligned to u64 boundary.
5534  */
5535 void
5536 ipfw_add(char *av[])
5537 {
5538         uint32_t rulebuf[1024];
5539         int rbufsize, default_off, tlen, rlen;
5540         size_t sz;
5541         struct tidx ts;
5542         struct ip_fw_rule *rule;
5543         caddr_t tbuf;
5544         ip_fw3_opheader *op3;
5545         ipfw_obj_ctlv *ctlv, *tstate;
5546
5547         rbufsize = sizeof(rulebuf);
5548         memset(rulebuf, 0, rbufsize);
5549         memset(&ts, 0, sizeof(ts));
5550
5551         /* Optimize case with no tables */
5552         default_off = sizeof(ipfw_obj_ctlv) + sizeof(ip_fw3_opheader);
5553         op3 = (ip_fw3_opheader *)rulebuf;
5554         ctlv = (ipfw_obj_ctlv *)(op3 + 1);
5555         rule = (struct ip_fw_rule *)(ctlv + 1);
5556         rbufsize -= default_off;
5557
5558         compile_rule(av, (uint32_t *)rule, &rbufsize, &ts);
5559         /* Align rule size to u64 boundary */
5560         rlen = roundup2(rbufsize, sizeof(uint64_t));
5561
5562         tbuf = NULL;
5563         sz = 0;
5564         tstate = NULL;
5565         if (ts.count != 0) {
5566                 /* Some tables. We have to alloc more data */
5567                 tlen = ts.count * sizeof(ipfw_obj_ntlv);
5568                 sz = default_off + sizeof(ipfw_obj_ctlv) + tlen + rlen;
5569
5570                 if ((tbuf = calloc(1, sz)) == NULL)
5571                         err(EX_UNAVAILABLE, "malloc() failed for IP_FW_ADD");
5572                 op3 = (ip_fw3_opheader *)tbuf;
5573                 /* Tables first */
5574                 ctlv = (ipfw_obj_ctlv *)(op3 + 1);
5575                 ctlv->head.type = IPFW_TLV_TBLNAME_LIST;
5576                 ctlv->head.length = sizeof(ipfw_obj_ctlv) + tlen;
5577                 ctlv->count = ts.count;
5578                 ctlv->objsize = sizeof(ipfw_obj_ntlv);
5579                 memcpy(ctlv + 1, ts.idx, tlen);
5580                 object_sort_ctlv(ctlv);
5581                 tstate = ctlv;
5582                 /* Rule next */
5583                 ctlv = (ipfw_obj_ctlv *)((caddr_t)ctlv + ctlv->head.length);
5584                 ctlv->head.type = IPFW_TLV_RULE_LIST;
5585                 ctlv->head.length = sizeof(ipfw_obj_ctlv) + rlen;
5586                 ctlv->count = 1;
5587                 memcpy(ctlv + 1, rule, rbufsize);
5588         } else {
5589                 /* Simply add header */
5590                 sz = rlen + default_off;
5591                 memset(ctlv, 0, sizeof(*ctlv));
5592                 ctlv->head.type = IPFW_TLV_RULE_LIST;
5593                 ctlv->head.length = sizeof(ipfw_obj_ctlv) + rlen;
5594                 ctlv->count = 1;
5595         }
5596
5597         if (do_get3(IP_FW_XADD, op3, &sz) != 0)
5598                 err(EX_UNAVAILABLE, "getsockopt(%s)", "IP_FW_XADD");
5599
5600         if (!g_co.do_quiet) {
5601                 struct format_opts sfo;
5602                 struct buf_pr bp;
5603                 memset(&sfo, 0, sizeof(sfo));
5604                 sfo.tstate = tstate;
5605                 sfo.set_mask = (uint32_t)(-1);
5606                 bp_alloc(&bp, 4096);
5607                 show_static_rule(&g_co, &sfo, &bp, rule, NULL);
5608                 printf("%s", bp.buf);
5609                 bp_free(&bp);
5610         }
5611
5612         if (tbuf != NULL)
5613                 free(tbuf);
5614
5615         if (ts.idx != NULL)
5616                 free(ts.idx);
5617 }
5618
5619 /*
5620  * clear the counters or the log counters.
5621  * optname has the following values:
5622  *  0 (zero both counters and logging)
5623  *  1 (zero logging only)
5624  */
5625 void
5626 ipfw_zero(int ac, char *av[], int optname)
5627 {
5628         ipfw_range_tlv rt;
5629         char const *errstr;
5630         char const *name = optname ? "RESETLOG" : "ZERO";
5631         uint32_t arg;
5632         int failed = EX_OK;
5633
5634         optname = optname ? IP_FW_XRESETLOG : IP_FW_XZERO;
5635         av++; ac--;
5636
5637         if (ac == 0) {
5638                 /* clear all entries */
5639                 memset(&rt, 0, sizeof(rt));
5640                 rt.flags = IPFW_RCFLAG_ALL;
5641                 if (do_range_cmd(optname, &rt) < 0)
5642                         err(EX_UNAVAILABLE, "setsockopt(IP_FW_X%s)", name);
5643                 if (!g_co.do_quiet)
5644                         printf("%s.\n", optname == IP_FW_XZERO ?
5645                             "Accounting cleared":"Logging counts reset");
5646
5647                 return;
5648         }
5649
5650         while (ac) {
5651                 /* Rule number */
5652                 if (isdigit(**av)) {
5653                         arg = strtonum(*av, 0, 0xffff, &errstr);
5654                         if (errstr)
5655                                 errx(EX_DATAERR,
5656                                     "invalid rule number %s\n", *av);
5657                         memset(&rt, 0, sizeof(rt));
5658                         rt.start_rule = arg;
5659                         rt.end_rule = arg;
5660                         rt.flags |= IPFW_RCFLAG_RANGE;
5661                         if (g_co.use_set != 0) {
5662                                 rt.set = g_co.use_set - 1;
5663                                 rt.flags |= IPFW_RCFLAG_SET;
5664                         }
5665                         if (do_range_cmd(optname, &rt) != 0) {
5666                                 warn("rule %u: setsockopt(IP_FW_X%s)",
5667                                     arg, name);
5668                                 failed = EX_UNAVAILABLE;
5669                         } else if (rt.new_set == 0) {
5670                                 printf("Entry %d not found\n", arg);
5671                                 failed = EX_UNAVAILABLE;
5672                         } else if (!g_co.do_quiet)
5673                                 printf("Entry %d %s.\n", arg,
5674                                     optname == IP_FW_XZERO ?
5675                                         "cleared" : "logging count reset");
5676                 } else {
5677                         errx(EX_USAGE, "invalid rule number ``%s''", *av);
5678                 }
5679                 av++; ac--;
5680         }
5681         if (failed != EX_OK)
5682                 exit(failed);
5683 }
5684
5685 void
5686 ipfw_flush(int force)
5687 {
5688         ipfw_range_tlv rt;
5689
5690         if (!force && !g_co.do_quiet) { /* need to ask user */
5691                 int c;
5692
5693                 printf("Are you sure? [yn] ");
5694                 fflush(stdout);
5695                 do {
5696                         c = toupper(getc(stdin));
5697                         while (c != '\n' && getc(stdin) != '\n')
5698                                 if (feof(stdin))
5699                                         return; /* and do not flush */
5700                 } while (c != 'Y' && c != 'N');
5701                 printf("\n");
5702                 if (c == 'N')   /* user said no */
5703                         return;
5704         }
5705         if (g_co.do_pipe) {
5706                 dummynet_flush();
5707                 return;
5708         }
5709         /* `ipfw set N flush` - is the same that `ipfw delete set N` */
5710         memset(&rt, 0, sizeof(rt));
5711         if (g_co.use_set != 0) {
5712                 rt.set = g_co.use_set - 1;
5713                 rt.flags = IPFW_RCFLAG_SET;
5714         } else
5715                 rt.flags = IPFW_RCFLAG_ALL;
5716         if (do_range_cmd(IP_FW_XDEL, &rt) != 0)
5717                         err(EX_UNAVAILABLE, "setsockopt(IP_FW_XDEL)");
5718         if (!g_co.do_quiet)
5719                 printf("Flushed all %s.\n", g_co.do_pipe ? "pipes" : "rules");
5720 }
5721
5722 static struct _s_x intcmds[] = {
5723       { "talist",       TOK_TALIST },
5724       { "iflist",       TOK_IFLIST },
5725       { "olist",        TOK_OLIST },
5726       { "vlist",        TOK_VLIST },
5727       { NULL, 0 }
5728 };
5729
5730 static struct _s_x otypes[] = {
5731         { "EACTION",    IPFW_TLV_EACTION },
5732         { "DYNSTATE",   IPFW_TLV_STATE_NAME },
5733         { NULL, 0 }
5734 };
5735
5736 static const char*
5737 lookup_eaction_name(ipfw_obj_ntlv *ntlv, int cnt, uint16_t type)
5738 {
5739         const char *name;
5740         int i;
5741
5742         name = NULL;
5743         for (i = 0; i < cnt; i++) {
5744                 if (ntlv[i].head.type != IPFW_TLV_EACTION)
5745                         continue;
5746                 if (IPFW_TLV_EACTION_NAME(ntlv[i].idx) != type)
5747                         continue;
5748                 name = ntlv[i].name;
5749                 break;
5750         }
5751         return (name);
5752 }
5753
5754 static void
5755 ipfw_list_objects(int ac __unused, char *av[] __unused)
5756 {
5757         ipfw_obj_lheader req, *olh;
5758         ipfw_obj_ntlv *ntlv;
5759         const char *name;
5760         size_t sz;
5761         uint32_t i;
5762
5763         memset(&req, 0, sizeof(req));
5764         sz = sizeof(req);
5765         if (do_get3(IP_FW_DUMP_SRVOBJECTS, &req.opheader, &sz) != 0)
5766                 if (errno != ENOMEM)
5767                         return;
5768
5769         sz = req.size;
5770         if ((olh = calloc(1, sz)) == NULL)
5771                 return;
5772
5773         olh->size = sz;
5774         if (do_get3(IP_FW_DUMP_SRVOBJECTS, &olh->opheader, &sz) != 0) {
5775                 free(olh);
5776                 return;
5777         }
5778
5779         if (olh->count > 0)
5780                 printf("Objects list:\n");
5781         else
5782                 printf("There are no objects\n");
5783         ntlv = (ipfw_obj_ntlv *)(olh + 1);
5784         for (i = 0; i < olh->count; i++) {
5785                 name = match_value(otypes, ntlv->head.type);
5786                 if (name == NULL)
5787                         name = lookup_eaction_name(
5788                             (ipfw_obj_ntlv *)(olh + 1), olh->count,
5789                             ntlv->head.type);
5790                 if (name == NULL)
5791                         printf(" kidx: %4d\ttype: %10d\tname: %s\n",
5792                             ntlv->idx, ntlv->head.type, ntlv->name);
5793                 else
5794                         printf(" kidx: %4d\ttype: %10s\tname: %s\n",
5795                             ntlv->idx, name, ntlv->name);
5796                 ntlv++;
5797         }
5798         free(olh);
5799 }
5800
5801 void
5802 ipfw_internal_handler(int ac, char *av[])
5803 {
5804         int tcmd;
5805
5806         ac--; av++;
5807         NEED1("internal cmd required");
5808
5809         if ((tcmd = match_token(intcmds, *av)) == -1)
5810                 errx(EX_USAGE, "invalid internal sub-cmd: %s", *av);
5811
5812         switch (tcmd) {
5813         case TOK_IFLIST:
5814                 ipfw_list_tifaces();
5815                 break;
5816         case TOK_TALIST:
5817                 ipfw_list_ta(ac, av);
5818                 break;
5819         case TOK_OLIST:
5820                 ipfw_list_objects(ac, av);
5821                 break;
5822         case TOK_VLIST:
5823                 ipfw_list_values(ac, av);
5824                 break;
5825         }
5826 }
5827
5828 static int
5829 ipfw_get_tracked_ifaces(ipfw_obj_lheader **polh)
5830 {
5831         ipfw_obj_lheader req, *olh;
5832         size_t sz;
5833
5834         memset(&req, 0, sizeof(req));
5835         sz = sizeof(req);
5836
5837         if (do_get3(IP_FW_XIFLIST, &req.opheader, &sz) != 0) {
5838                 if (errno != ENOMEM)
5839                         return (errno);
5840         }
5841
5842         sz = req.size;
5843         if ((olh = calloc(1, sz)) == NULL)
5844                 return (ENOMEM);
5845
5846         olh->size = sz;
5847         if (do_get3(IP_FW_XIFLIST, &olh->opheader, &sz) != 0) {
5848                 free(olh);
5849                 return (errno);
5850         }
5851
5852         *polh = olh;
5853         return (0);
5854 }
5855
5856 static int
5857 ifinfo_cmp(const void *a, const void *b)
5858 {
5859         const ipfw_iface_info *ia, *ib;
5860
5861         ia = (const ipfw_iface_info *)a;
5862         ib = (const ipfw_iface_info *)b;
5863
5864         return (stringnum_cmp(ia->ifname, ib->ifname));
5865 }
5866
5867 /*
5868  * Retrieves table list from kernel,
5869  * optionally sorts it and calls requested function for each table.
5870  * Returns 0 on success.
5871  */
5872 static void
5873 ipfw_list_tifaces(void)
5874 {
5875         ipfw_obj_lheader *olh = NULL;
5876         ipfw_iface_info *info;
5877         uint32_t i;
5878         int error;
5879
5880         if ((error = ipfw_get_tracked_ifaces(&olh)) != 0)
5881                 err(EX_OSERR, "Unable to request ipfw tracked interface list");
5882
5883         qsort(olh + 1, olh->count, olh->objsize, ifinfo_cmp);
5884
5885         info = (ipfw_iface_info *)(olh + 1);
5886         for (i = 0; i < olh->count; i++) {
5887                 if (info->flags & IPFW_IFFLAG_RESOLVED)
5888                         printf("%s ifindex: %d refcount: %u changes: %u\n",
5889                             info->ifname, info->ifindex, info->refcnt,
5890                             info->gencnt);
5891                 else
5892                         printf("%s ifindex: unresolved refcount: %u changes: %u\n",
5893                             info->ifname, info->refcnt, info->gencnt);
5894                 info = (ipfw_iface_info *)((caddr_t)info + olh->objsize);
5895         }
5896
5897         free(olh);
5898 }