sbin/ipfw/ipfw2.c

   1 /*
   2  * Copyright (c) 2002-2003 Luigi Rizzo
   3  * Copyright (c) 1996 Alex Nash, Paul Traina, Poul-Henning Kamp
   4  * Copyright (c) 1994 Ugen J.S.Antsilevich
   5  *
   6  * Idea and grammar partially left from:
   7  * Copyright (c) 1993 Daniel Boulet
   8  *
   9  * Redistribution and use in source forms, with and without modification,
  10  * are permitted provided that this entire comment appears intact.
  11  *
  12  * Redistribution in binary form may occur without any restrictions.
  13  * Obviously, it would be nice if you gave credit where credit is due
  14  * but requiring it would be too onerous.
  15  *
  16  * This software is provided ``AS IS'' without any warranties of any kind.
  17  *
  18  * NEW command line interface for IP firewall facility
  19  *
  20  * $FreeBSD$
  21  */
  22
  23 #include <sys/types.h>
  24 #include <sys/param.h>
  25 #include <sys/socket.h>
  26 #include <sys/sockio.h>
  27 #include <sys/sysctl.h>
  28
  29 #include "ipfw2.h"
  30
  31 #include <ctype.h>
  32 #include <err.h>
  33 #include <errno.h>
  34 #include <grp.h>
  35 #include <netdb.h>
  36 #include <pwd.h>
  37 #include <stdio.h>
  38 #include <stdarg.h>
  39 #include <stdlib.h>
  40 #include <string.h>
  41 #include <sysexits.h>
  42 #include <time.h>       /* ctime */
  43 #include <timeconv.h>   /* _long_to_time */
  44 #include <unistd.h>
  45 #include <fcntl.h>
  46 #include <stddef.h>     /* offsetof */
  47
  48 #include <net/ethernet.h>
  49 #include <net/if.h>             /* only IFNAMSIZ */
  50 #include <netinet/in.h>
  51 #include <netinet/in_systm.h>   /* only n_short, n_long */
  52 #include <netinet/ip.h>
  53 #include <netinet/ip_icmp.h>
  54 #include <netinet/ip_fw.h>
  55 #include <netinet/tcp.h>
  56 #include <arpa/inet.h>
  57
  58 struct cmdline_opts co; /* global options */
  59
  60 struct format_opts {
  61         int bcwidth;
  62         int pcwidth;
  63         int show_counters;
  64         int show_time;          /* show timestamp */
  65         uint32_t set_mask;      /* enabled sets mask */
  66         uint32_t flags;         /* request flags */
  67         uint32_t first;         /* first rule to request */
  68         uint32_t last;          /* last rule to request */
  69         uint32_t dcnt;          /* number of dynamic states */
  70         ipfw_obj_ctlv *tstate;  /* table state data */
  71 };
  72
  73 int resvd_set_number = RESVD_SET;
  74
  75 int ipfw_socket = -1;
  76
  77 #define CHECK_LENGTH(v, len) do {                               \
  78         if ((v) < (len))                                        \
  79                 errx(EX_DATAERR, "Rule too long");              \
  80         } while (0)
  81 /*
  82  * Check if we have enough space in cmd buffer. Note that since
  83  * first 8? u32 words are reserved by reserved header, full cmd
  84  * buffer can't be used, so we need to protect from buffer overrun
  85  * only. At the beginning, cblen is less than actual buffer size by
  86  * size of ipfw_insn_u32 instruction + 1 u32 work. This eliminates need
  87  * for checking small instructions fitting in given range.
  88  * We also (ab)use the fact that ipfw_insn is always the first field
  89  * for any custom instruction.
  90  */
  91 #define CHECK_CMDLEN    CHECK_LENGTH(cblen, F_LEN((ipfw_insn *)cmd))
  92
  93 #define GET_UINT_ARG(arg, min, max, tok, s_x) do {                      \
  94         if (!av[0])                                                     \
  95                 errx(EX_USAGE, "%s: missing argument", match_value(s_x, tok)); \
  96         if (_substrcmp(*av, "tablearg") == 0) {                         \
  97                 arg = IP_FW_TARG;                                       \
  98                 break;                                                  \
  99         }                                                               \
 100                                                                         \
 101         {                                                               \
 102         long _xval;                                                     \
 103         char *end;                                                      \
 104                                                                         \
 105         _xval = strtol(*av, &end, 10);                                  \
 106                                                                         \
 107         if (!isdigit(**av) || *end != '\0' || (_xval == 0 && errno == EINVAL)) \
 108                 errx(EX_DATAERR, "%s: invalid argument: %s",            \
 109                     match_value(s_x, tok), *av);                        \
 110                                                                         \
 111         if (errno == ERANGE || _xval < min || _xval > max)              \
 112                 errx(EX_DATAERR, "%s: argument is out of range (%u..%u): %s", \
 113                     match_value(s_x, tok), min, max, *av);              \
 114                                                                         \
 115         if (_xval == IP_FW_TARG)                                        \
 116                 errx(EX_DATAERR, "%s: illegal argument value: %s",      \
 117                     match_value(s_x, tok), *av);                        \
 118         arg = _xval;                                                    \
 119         }                                                               \
 120 } while (0)
 121
 122 static struct _s_x f_tcpflags[] = {
 123         { "syn", TH_SYN },
 124         { "fin", TH_FIN },
 125         { "ack", TH_ACK },
 126         { "psh", TH_PUSH },
 127         { "rst", TH_RST },
 128         { "urg", TH_URG },
 129         { "tcp flag", 0 },
 130         { NULL, 0 }
 131 };
 132
 133 static struct _s_x f_tcpopts[] = {
 134         { "mss",        IP_FW_TCPOPT_MSS },
 135         { "maxseg",     IP_FW_TCPOPT_MSS },
 136         { "window",     IP_FW_TCPOPT_WINDOW },
 137         { "sack",       IP_FW_TCPOPT_SACK },
 138         { "ts",         IP_FW_TCPOPT_TS },
 139         { "timestamp",  IP_FW_TCPOPT_TS },
 140         { "cc",         IP_FW_TCPOPT_CC },
 141         { "tcp option", 0 },
 142         { NULL, 0 }
 143 };
 144
 145 /*
 146  * IP options span the range 0 to 255 so we need to remap them
 147  * (though in fact only the low 5 bits are significant).
 148  */
 149 static struct _s_x f_ipopts[] = {
 150         { "ssrr",       IP_FW_IPOPT_SSRR},
 151         { "lsrr",       IP_FW_IPOPT_LSRR},
 152         { "rr",         IP_FW_IPOPT_RR},
 153         { "ts",         IP_FW_IPOPT_TS},
 154         { "ip option",  0 },
 155         { NULL, 0 }
 156 };
 157
 158 static struct _s_x f_iptos[] = {
 159         { "lowdelay",   IPTOS_LOWDELAY},
 160         { "throughput", IPTOS_THROUGHPUT},
 161         { "reliability", IPTOS_RELIABILITY},
 162         { "mincost",    IPTOS_MINCOST},
 163         { "congestion", IPTOS_ECN_CE},
 164         { "ecntransport", IPTOS_ECN_ECT0},
 165         { "ip tos option", 0},
 166         { NULL, 0 }
 167 };
 168
 169 struct _s_x f_ipdscp[] = {
 170         { "af11", IPTOS_DSCP_AF11 >> 2 },       /* 001010 */
 171         { "af12", IPTOS_DSCP_AF12 >> 2 },       /* 001100 */
 172         { "af13", IPTOS_DSCP_AF13 >> 2 },       /* 001110 */
 173         { "af21", IPTOS_DSCP_AF21 >> 2 },       /* 010010 */
 174         { "af22", IPTOS_DSCP_AF22 >> 2 },       /* 010100 */
 175         { "af23", IPTOS_DSCP_AF23 >> 2 },       /* 010110 */
 176         { "af31", IPTOS_DSCP_AF31 >> 2 },       /* 011010 */
 177         { "af32", IPTOS_DSCP_AF32 >> 2 },       /* 011100 */
 178         { "af33", IPTOS_DSCP_AF33 >> 2 },       /* 011110 */
 179         { "af41", IPTOS_DSCP_AF41 >> 2 },       /* 100010 */
 180         { "af42", IPTOS_DSCP_AF42 >> 2 },       /* 100100 */
 181         { "af43", IPTOS_DSCP_AF43 >> 2 },       /* 100110 */
 182         { "be", IPTOS_DSCP_CS0 >> 2 },  /* 000000 */
 183         { "ef", IPTOS_DSCP_EF >> 2 },   /* 101110 */
 184         { "cs0", IPTOS_DSCP_CS0 >> 2 }, /* 000000 */
 185         { "cs1", IPTOS_DSCP_CS1 >> 2 }, /* 001000 */
 186         { "cs2", IPTOS_DSCP_CS2 >> 2 }, /* 010000 */
 187         { "cs3", IPTOS_DSCP_CS3 >> 2 }, /* 011000 */
 188         { "cs4", IPTOS_DSCP_CS4 >> 2 }, /* 100000 */
 189         { "cs5", IPTOS_DSCP_CS5 >> 2 }, /* 101000 */
 190         { "cs6", IPTOS_DSCP_CS6 >> 2 }, /* 110000 */
 191         { "cs7", IPTOS_DSCP_CS7 >> 2 }, /* 100000 */
 192         { NULL, 0 }
 193 };
 194
 195 static struct _s_x limit_masks[] = {
 196         {"all",         DYN_SRC_ADDR|DYN_SRC_PORT|DYN_DST_ADDR|DYN_DST_PORT},
 197         {"src-addr",    DYN_SRC_ADDR},
 198         {"src-port",    DYN_SRC_PORT},
 199         {"dst-addr",    DYN_DST_ADDR},
 200         {"dst-port",    DYN_DST_PORT},
 201         {NULL,          0}
 202 };
 203
 204 /*
 205  * we use IPPROTO_ETHERTYPE as a fake protocol id to call the print routines
 206  * This is only used in this code.
 207  */
 208 #define IPPROTO_ETHERTYPE       0x1000
 209 static struct _s_x ether_types[] = {
 210     /*
 211      * Note, we cannot use "-:&/" in the names because they are field
 212      * separators in the type specifications. Also, we use s = NULL as
 213      * end-delimiter, because a type of 0 can be legal.
 214      */
 215         { "ip",         0x0800 },
 216         { "ipv4",       0x0800 },
 217         { "ipv6",       0x86dd },
 218         { "arp",        0x0806 },
 219         { "rarp",       0x8035 },
 220         { "vlan",       0x8100 },
 221         { "loop",       0x9000 },
 222         { "trail",      0x1000 },
 223         { "at",         0x809b },
 224         { "atalk",      0x809b },
 225         { "aarp",       0x80f3 },
 226         { "pppoe_disc", 0x8863 },
 227         { "pppoe_sess", 0x8864 },
 228         { "ipx_8022",   0x00E0 },
 229         { "ipx_8023",   0x0000 },
 230         { "ipx_ii",     0x8137 },
 231         { "ipx_snap",   0x8137 },
 232         { "ipx",        0x8137 },
 233         { "ns",         0x0600 },
 234         { NULL,         0 }
 235 };
 236
 237 static struct _s_x rule_eactions[] = {
 238         { "nptv6",              TOK_NPTV6 },
 239         { NULL, 0 }     /* terminator */
 240 };
 241
 242 static struct _s_x rule_actions[] = {
 243         { "accept",             TOK_ACCEPT },
 244         { "pass",               TOK_ACCEPT },
 245         { "allow",              TOK_ACCEPT },
 246         { "permit",             TOK_ACCEPT },
 247         { "count",              TOK_COUNT },
 248         { "pipe",               TOK_PIPE },
 249         { "queue",              TOK_QUEUE },
 250         { "divert",             TOK_DIVERT },
 251         { "tee",                TOK_TEE },
 252         { "netgraph",           TOK_NETGRAPH },
 253         { "ngtee",              TOK_NGTEE },
 254         { "fwd",                TOK_FORWARD },
 255         { "forward",            TOK_FORWARD },
 256         { "skipto",             TOK_SKIPTO },
 257         { "deny",               TOK_DENY },
 258         { "drop",               TOK_DENY },
 259         { "reject",             TOK_REJECT },
 260         { "reset6",             TOK_RESET6 },
 261         { "reset",              TOK_RESET },
 262         { "unreach6",           TOK_UNREACH6 },
 263         { "unreach",            TOK_UNREACH },
 264         { "check-state",        TOK_CHECKSTATE },
 265         { "//",                 TOK_COMMENT },
 266         { "nat",                TOK_NAT },
 267         { "reass",              TOK_REASS },
 268         { "setfib",             TOK_SETFIB },
 269         { "setdscp",            TOK_SETDSCP },
 270         { "call",               TOK_CALL },
 271         { "return",             TOK_RETURN },
 272         { "eaction",            TOK_EACTION },
 273         { NULL, 0 }     /* terminator */
 274 };
 275
 276 static struct _s_x rule_action_params[] = {
 277         { "altq",               TOK_ALTQ },
 278         { "log",                TOK_LOG },
 279         { "tag",                TOK_TAG },
 280         { "untag",              TOK_UNTAG },
 281         { NULL, 0 }     /* terminator */
 282 };
 283
 284 /*
 285  * The 'lookup' instruction accepts one of the following arguments.
 286  * -1 is a terminator for the list.
 287  * Arguments are passed as v[1] in O_DST_LOOKUP options.
 288  */
 289 static int lookup_key[] = {
 290         TOK_DSTIP, TOK_SRCIP, TOK_DSTPORT, TOK_SRCPORT,
 291         TOK_UID, TOK_JAIL, TOK_DSCP, -1 };
 292
 293 static struct _s_x rule_options[] = {
 294         { "tagged",             TOK_TAGGED },
 295         { "uid",                TOK_UID },
 296         { "gid",                TOK_GID },
 297         { "jail",               TOK_JAIL },
 298         { "in",                 TOK_IN },
 299         { "limit",              TOK_LIMIT },
 300         { "keep-state",         TOK_KEEPSTATE },
 301         { "bridged",            TOK_LAYER2 },
 302         { "layer2",             TOK_LAYER2 },
 303         { "out",                TOK_OUT },
 304         { "diverted",           TOK_DIVERTED },
 305         { "diverted-loopback",  TOK_DIVERTEDLOOPBACK },
 306         { "diverted-output",    TOK_DIVERTEDOUTPUT },
 307         { "xmit",               TOK_XMIT },
 308         { "recv",               TOK_RECV },
 309         { "via",                TOK_VIA },
 310         { "fragment",           TOK_FRAG },
 311         { "frag",               TOK_FRAG },
 312         { "fib",                TOK_FIB },
 313         { "ipoptions",          TOK_IPOPTS },
 314         { "ipopts",             TOK_IPOPTS },
 315         { "iplen",              TOK_IPLEN },
 316         { "ipid",               TOK_IPID },
 317         { "ipprecedence",       TOK_IPPRECEDENCE },
 318         { "dscp",               TOK_DSCP },
 319         { "iptos",              TOK_IPTOS },
 320         { "ipttl",              TOK_IPTTL },
 321         { "ipversion",          TOK_IPVER },
 322         { "ipver",              TOK_IPVER },
 323         { "estab",              TOK_ESTAB },
 324         { "established",        TOK_ESTAB },
 325         { "setup",              TOK_SETUP },
 326         { "sockarg",            TOK_SOCKARG },
 327         { "tcpdatalen",         TOK_TCPDATALEN },
 328         { "tcpflags",           TOK_TCPFLAGS },
 329         { "tcpflgs",            TOK_TCPFLAGS },
 330         { "tcpoptions",         TOK_TCPOPTS },
 331         { "tcpopts",            TOK_TCPOPTS },
 332         { "tcpseq",             TOK_TCPSEQ },
 333         { "tcpack",             TOK_TCPACK },
 334         { "tcpwin",             TOK_TCPWIN },
 335         { "icmptype",           TOK_ICMPTYPES },
 336         { "icmptypes",          TOK_ICMPTYPES },
 337         { "dst-ip",             TOK_DSTIP },
 338         { "src-ip",             TOK_SRCIP },
 339         { "dst-port",           TOK_DSTPORT },
 340         { "src-port",           TOK_SRCPORT },
 341         { "proto",              TOK_PROTO },
 342         { "MAC",                TOK_MAC },
 343         { "mac",                TOK_MAC },
 344         { "mac-type",           TOK_MACTYPE },
 345         { "verrevpath",         TOK_VERREVPATH },
 346         { "versrcreach",        TOK_VERSRCREACH },
 347         { "antispoof",          TOK_ANTISPOOF },
 348         { "ipsec",              TOK_IPSEC },
 349         { "icmp6type",          TOK_ICMP6TYPES },
 350         { "icmp6types",         TOK_ICMP6TYPES },
 351         { "ext6hdr",            TOK_EXT6HDR},
 352         { "flow-id",            TOK_FLOWID},
 353         { "ipv6",               TOK_IPV6},
 354         { "ip6",                TOK_IPV6},
 355         { "ipv4",               TOK_IPV4},
 356         { "ip4",                TOK_IPV4},
 357         { "dst-ipv6",           TOK_DSTIP6},
 358         { "dst-ip6",            TOK_DSTIP6},
 359         { "src-ipv6",           TOK_SRCIP6},
 360         { "src-ip6",            TOK_SRCIP6},
 361         { "lookup",             TOK_LOOKUP},
 362         { "flow",               TOK_FLOW},
 363         { "//",                 TOK_COMMENT },
 364
 365         { "not",                TOK_NOT },              /* pseudo option */
 366         { "!", /* escape ? */   TOK_NOT },              /* pseudo option */
 367         { "or",                 TOK_OR },               /* pseudo option */
 368         { "|", /* escape */     TOK_OR },               /* pseudo option */
 369         { "{",                  TOK_STARTBRACE },       /* pseudo option */
 370         { "(",                  TOK_STARTBRACE },       /* pseudo option */
 371         { "}",                  TOK_ENDBRACE },         /* pseudo option */
 372         { ")",                  TOK_ENDBRACE },         /* pseudo option */
 373         { NULL, 0 }     /* terminator */
 374 };
 375
 376 void bprint_uint_arg(struct buf_pr *bp, const char *str, uint32_t arg);
 377 static int ipfw_get_config(struct cmdline_opts *co, struct format_opts *fo,
 378     ipfw_cfg_lheader **pcfg, size_t *psize);
 379 static int ipfw_show_config(struct cmdline_opts *co, struct format_opts *fo,
 380     ipfw_cfg_lheader *cfg, size_t sz, int ac, char **av);
 381 static void ipfw_list_tifaces(void);
 382
 383 struct tidx;
 384 static uint16_t pack_object(struct tidx *tstate, char *name, int otype);
 385 static uint16_t pack_table(struct tidx *tstate, char *name);
 386
 387 static char *table_search_ctlv(ipfw_obj_ctlv *ctlv, uint16_t idx);
 388 static void object_sort_ctlv(ipfw_obj_ctlv *ctlv);
 389 static char *object_search_ctlv(ipfw_obj_ctlv *ctlv, uint16_t idx,
 390     uint16_t type);
 391
 392 /*
 393  * Simple string buffer API.
 394  * Used to simplify buffer passing between function and for
 395  * transparent overrun handling.
 396  */
 397
 398 /*
 399  * Allocates new buffer of given size @sz.
 400  *
 401  * Returns 0 on success.
 402  */
 403 int
 404 bp_alloc(struct buf_pr *b, size_t size)
 405 {
 406         memset(b, 0, sizeof(struct buf_pr));
 407
 408         if ((b->buf = calloc(1, size)) == NULL)
 409                 return (ENOMEM);
 410
 411         b->ptr = b->buf;
 412         b->size = size;
 413         b->avail = b->size;
 414
 415         return (0);
 416 }
 417
 418 void
 419 bp_free(struct buf_pr *b)
 420 {
 421
 422         free(b->buf);
 423 }
 424
 425 /*
 426  * Flushes buffer so new writer start from beginning.
 427  */
 428 void
 429 bp_flush(struct buf_pr *b)
 430 {
 431
 432         b->ptr = b->buf;
 433         b->avail = b->size;
 434         b->buf[0] = '\0';
 435 }
 436
 437 /*
 438  * Print message specified by @format and args.
 439  * Automatically manage buffer space and transparently handle
 440  * buffer overruns.
 441  *
 442  * Returns number of bytes that should have been printed.
 443  */
 444 int
 445 bprintf(struct buf_pr *b, char *format, ...)
 446 {
 447         va_list args;
 448         int i;
 449
 450         va_start(args, format);
 451
 452         i = vsnprintf(b->ptr, b->avail, format, args);
 453         va_end(args);
 454
 455         if (i > b->avail || i < 0) {
 456                 /* Overflow or print error */
 457                 b->avail = 0;
 458         } else {
 459                 b->ptr += i;
 460                 b->avail -= i;
 461         }
 462
 463         b->needed += i;
 464
 465         return (i);
 466 }
 467
 468 /*
 469  * Special values printer for tablearg-aware opcodes.
 470  */
 471 void
 472 bprint_uint_arg(struct buf_pr *bp, const char *str, uint32_t arg)
 473 {
 474
 475         if (str != NULL)
 476                 bprintf(bp, "%s", str);
 477         if (arg == IP_FW_TARG)
 478                 bprintf(bp, "tablearg");
 479         else
 480                 bprintf(bp, "%u", arg);
 481 }
 482
 483 /*
 484  * Helper routine to print a possibly unaligned uint64_t on
 485  * various platform. If width > 0, print the value with
 486  * the desired width, followed by a space;
 487  * otherwise, return the required width.
 488  */
 489 int
 490 pr_u64(struct buf_pr *b, uint64_t *pd, int width)
 491 {
 492 #ifdef TCC
 493 #define U64_FMT "I64"
 494 #else
 495 #define U64_FMT "llu"
 496 #endif
 497         uint64_t u;
 498         unsigned long long d;
 499
 500         bcopy (pd, &u, sizeof(u));
 501         d = u;
 502         return (width > 0) ?
 503                 bprintf(b, "%*" U64_FMT " ", width, d) :
 504                 snprintf(NULL, 0, "%" U64_FMT, d) ;
 505 #undef U64_FMT
 506 }
 507
 508
 509 void *
 510 safe_calloc(size_t number, size_t size)
 511 {
 512         void *ret = calloc(number, size);
 513
 514         if (ret == NULL)
 515                 err(EX_OSERR, "calloc");
 516         return ret;
 517 }
 518
 519 void *
 520 safe_realloc(void *ptr, size_t size)
 521 {
 522         void *ret = realloc(ptr, size);
 523
 524         if (ret == NULL)
 525                 err(EX_OSERR, "realloc");
 526         return ret;
 527 }
 528
 529 /*
 530  * Compare things like interface or table names.
 531  */
 532 int
 533 stringnum_cmp(const char *a, const char *b)
 534 {
 535         int la, lb;
 536
 537         la = strlen(a);
 538         lb = strlen(b);
 539
 540         if (la > lb)
 541                 return (1);
 542         else if (la < lb)
 543                 return (-01);
 544
 545         return (strcmp(a, b));
 546 }
 547
 548
 549 /*
 550  * conditionally runs the command.
 551  * Selected options or negative -> getsockopt
 552  */
 553 int
 554 do_cmd(int optname, void *optval, uintptr_t optlen)
 555 {
 556         int i;
 557
 558         if (co.test_only)
 559                 return 0;
 560
 561         if (ipfw_socket == -1)
 562                 ipfw_socket = socket(AF_INET, SOCK_RAW, IPPROTO_RAW);
 563         if (ipfw_socket < 0)
 564                 err(EX_UNAVAILABLE, "socket");
 565
 566         if (optname == IP_FW_GET || optname == IP_DUMMYNET_GET ||
 567             optname == IP_FW_ADD || optname == IP_FW3 ||
 568             optname == IP_FW_NAT_GET_CONFIG ||
 569             optname < 0 ||
 570             optname == IP_FW_NAT_GET_LOG) {
 571                 if (optname < 0)
 572                         optname = -optname;
 573                 i = getsockopt(ipfw_socket, IPPROTO_IP, optname, optval,
 574                         (socklen_t *)optlen);
 575         } else {
 576                 i = setsockopt(ipfw_socket, IPPROTO_IP, optname, optval, optlen);
 577         }
 578         return i;
 579 }
 580
 581 /*
 582  * do_set3 - pass ipfw control cmd to kernel
 583  * @optname: option name
 584  * @optval: pointer to option data
 585  * @optlen: option length
 586  *
 587  * Assumes op3 header is already embedded.
 588  * Calls setsockopt() with IP_FW3 as kernel-visible opcode.
 589  * Returns 0 on success or errno otherwise.
 590  */
 591 int
 592 do_set3(int optname, ip_fw3_opheader *op3, uintptr_t optlen)
 593 {
 594
 595         if (co.test_only)
 596                 return (0);
 597
 598         if (ipfw_socket == -1)
 599                 ipfw_socket = socket(AF_INET, SOCK_RAW, IPPROTO_RAW);
 600         if (ipfw_socket < 0)
 601                 err(EX_UNAVAILABLE, "socket");
 602
 603         op3->opcode = optname;
 604
 605         return (setsockopt(ipfw_socket, IPPROTO_IP, IP_FW3, op3, optlen));
 606 }
 607
 608 /*
 609  * do_get3 - pass ipfw control cmd to kernel
 610  * @optname: option name
 611  * @optval: pointer to option data
 612  * @optlen: pointer to option length
 613  *
 614  * Assumes op3 header is already embedded.
 615  * Calls getsockopt() with IP_FW3 as kernel-visible opcode.
 616  * Returns 0 on success or errno otherwise.
 617  */
 618 int
 619 do_get3(int optname, ip_fw3_opheader *op3, size_t *optlen)
 620 {
 621         int error;
 622
 623         if (co.test_only)
 624                 return (0);
 625
 626         if (ipfw_socket == -1)
 627                 ipfw_socket = socket(AF_INET, SOCK_RAW, IPPROTO_RAW);
 628         if (ipfw_socket < 0)
 629                 err(EX_UNAVAILABLE, "socket");
 630
 631         op3->opcode = optname;
 632
 633         error = getsockopt(ipfw_socket, IPPROTO_IP, IP_FW3, op3,
 634             (socklen_t *)optlen);
 635
 636         return (error);
 637 }
 638
 639 /**
 640  * match_token takes a table and a string, returns the value associated
 641  * with the string (-1 in case of failure).
 642  */
 643 int
 644 match_token(struct _s_x *table, const char *string)
 645 {
 646         struct _s_x *pt;
 647         uint i = strlen(string);
 648
 649         for (pt = table ; i && pt->s != NULL ; pt++)
 650                 if (strlen(pt->s) == i && !bcmp(string, pt->s, i))
 651                         return pt->x;
 652         return (-1);
 653 }
 654
 655 /**
 656  * match_token_relaxed takes a table and a string, returns the value associated
 657  * with the string for the best match.
 658  *
 659  * Returns:
 660  * value from @table for matched records
 661  * -1 for non-matched records
 662  * -2 if more than one records match @string.
 663  */
 664 int
 665 match_token_relaxed(struct _s_x *table, const char *string)
 666 {
 667         struct _s_x *pt, *m;
 668         int i, c;
 669
 670         i = strlen(string);
 671         c = 0;
 672
 673         for (pt = table ; i != 0 && pt->s != NULL ; pt++) {
 674                 if (strncmp(pt->s, string, i) != 0)
 675                         continue;
 676                 m = pt;
 677                 c++;
 678         }
 679
 680         if (c == 1)
 681                 return (m->x);
 682
 683         return (c > 0 ? -2: -1);
 684 }
 685
 686 int
 687 get_token(struct _s_x *table, const char *string, const char *errbase)
 688 {
 689         int tcmd;
 690
 691         if ((tcmd = match_token_relaxed(table, string)) < 0)
 692                 errx(EX_USAGE, "%s %s %s",
 693                     (tcmd == 0) ? "invalid" : "ambiguous", errbase, string);
 694
 695         return (tcmd);
 696 }
 697
 698 /**
 699  * match_value takes a table and a value, returns the string associated
 700  * with the value (NULL in case of failure).
 701  */
 702 char const *
 703 match_value(struct _s_x *p, int value)
 704 {
 705         for (; p->s != NULL; p++)
 706                 if (p->x == value)
 707                         return p->s;
 708         return NULL;
 709 }
 710
 711 size_t
 712 concat_tokens(char *buf, size_t bufsize, struct _s_x *table, char *delimiter)
 713 {
 714         struct _s_x *pt;
 715         int l;
 716         size_t sz;
 717
 718         for (sz = 0, pt = table ; pt->s != NULL; pt++) {
 719                 l = snprintf(buf + sz, bufsize - sz, "%s%s",
 720                     (sz == 0) ? "" : delimiter, pt->s);
 721                 sz += l;
 722                 bufsize += l;
 723                 if (sz > bufsize)
 724                         return (bufsize);
 725         }
 726
 727         return (sz);
 728 }
 729
 730 /*
 731  * helper function to process a set of flags and set bits in the
 732  * appropriate masks.
 733  */
 734 int
 735 fill_flags(struct _s_x *flags, char *p, char **e, uint32_t *set,
 736     uint32_t *clear)
 737 {
 738         char *q;        /* points to the separator */
 739         int val;
 740         uint32_t *which;        /* mask we are working on */
 741
 742         while (p && *p) {
 743                 if (*p == '!') {
 744                         p++;
 745                         which = clear;
 746                 } else
 747                         which = set;
 748                 q = strchr(p, ',');
 749                 if (q)
 750                         *q++ = '\0';
 751                 val = match_token(flags, p);
 752                 if (val <= 0) {
 753                         if (e != NULL)
 754                                 *e = p;
 755                         return (-1);
 756                 }
 757                 *which |= (uint32_t)val;
 758                 p = q;
 759         }
 760         return (0);
 761 }
 762
 763 void
 764 print_flags_buffer(char *buf, size_t sz, struct _s_x *list, uint32_t set)
 765 {
 766         char const *comma = "";
 767         int i, l;
 768
 769         for (i = 0; list[i].x != 0; i++) {
 770                 if ((set & list[i].x) == 0)
 771                         continue;
 772
 773                 set &= ~list[i].x;
 774                 l = snprintf(buf, sz, "%s%s", comma, list[i].s);
 775                 if (l >= sz)
 776                         return;
 777                 comma = ",";
 778                 buf += l;
 779                 sz -=l;
 780         }
 781 }
 782
 783 /*
 784  * _substrcmp takes two strings and returns 1 if they do not match,
 785  * and 0 if they match exactly or the first string is a sub-string
 786  * of the second.  A warning is printed to stderr in the case that the
 787  * first string is a sub-string of the second.
 788  *
 789  * This function will be removed in the future through the usual
 790  * deprecation process.
 791  */
 792 int
 793 _substrcmp(const char *str1, const char* str2)
 794 {
 795
 796         if (strncmp(str1, str2, strlen(str1)) != 0)
 797                 return 1;
 798
 799         if (strlen(str1) != strlen(str2))
 800                 warnx("DEPRECATED: '%s' matched '%s' as a sub-string",
 801                     str1, str2);
 802         return 0;
 803 }
 804
 805 /*
 806  * _substrcmp2 takes three strings and returns 1 if the first two do not match,
 807  * and 0 if they match exactly or the second string is a sub-string
 808  * of the first.  A warning is printed to stderr in the case that the
 809  * first string does not match the third.
 810  *
 811  * This function exists to warn about the bizarre construction
 812  * strncmp(str, "by", 2) which is used to allow people to use a shortcut
 813  * for "bytes".  The problem is that in addition to accepting "by",
 814  * "byt", "byte", and "bytes", it also excepts "by_rabid_dogs" and any
 815  * other string beginning with "by".
 816  *
 817  * This function will be removed in the future through the usual
 818  * deprecation process.
 819  */
 820 int
 821 _substrcmp2(const char *str1, const char* str2, const char* str3)
 822 {
 823
 824         if (strncmp(str1, str2, strlen(str2)) != 0)
 825                 return 1;
 826
 827         if (strcmp(str1, str3) != 0)
 828                 warnx("DEPRECATED: '%s' matched '%s'",
 829                     str1, str3);
 830         return 0;
 831 }
 832
 833 /*
 834  * prints one port, symbolic or numeric
 835  */
 836 static void
 837 print_port(struct buf_pr *bp, int proto, uint16_t port)
 838 {
 839
 840         if (proto == IPPROTO_ETHERTYPE) {
 841                 char const *s;
 842
 843                 if (co.do_resolv && (s = match_value(ether_types, port)) )
 844                         bprintf(bp, "%s", s);
 845                 else
 846                         bprintf(bp, "0x%04x", port);
 847         } else {
 848                 struct servent *se = NULL;
 849                 if (co.do_resolv) {
 850                         struct protoent *pe = getprotobynumber(proto);
 851
 852                         se = getservbyport(htons(port), pe ? pe->p_name : NULL);
 853                 }
 854                 if (se)
 855                         bprintf(bp, "%s", se->s_name);
 856                 else
 857                         bprintf(bp, "%d", port);
 858         }
 859 }
 860
 861 static struct _s_x _port_name[] = {
 862         {"dst-port",    O_IP_DSTPORT},
 863         {"src-port",    O_IP_SRCPORT},
 864         {"ipid",        O_IPID},
 865         {"iplen",       O_IPLEN},
 866         {"ipttl",       O_IPTTL},
 867         {"mac-type",    O_MAC_TYPE},
 868         {"tcpdatalen",  O_TCPDATALEN},
 869         {"tcpwin",      O_TCPWIN},
 870         {"tagged",      O_TAGGED},
 871         {NULL,          0}
 872 };
 873
 874 /*
 875  * Print the values in a list 16-bit items of the types above.
 876  * XXX todo: add support for mask.
 877  */
 878 static void
 879 print_newports(struct buf_pr *bp, ipfw_insn_u16 *cmd, int proto, int opcode)
 880 {
 881         uint16_t *p = cmd->ports;
 882         int i;
 883         char const *sep;
 884
 885         if (opcode != 0) {
 886                 sep = match_value(_port_name, opcode);
 887                 if (sep == NULL)
 888                         sep = "???";
 889                 bprintf(bp, " %s", sep);
 890         }
 891         sep = " ";
 892         for (i = F_LEN((ipfw_insn *)cmd) - 1; i > 0; i--, p += 2) {
 893                 bprintf(bp, "%s", sep);
 894                 print_port(bp, proto, p[0]);
 895                 if (p[0] != p[1]) {
 896                         bprintf(bp, "-");
 897                         print_port(bp, proto, p[1]);
 898                 }
 899                 sep = ",";
 900         }
 901 }
 902
 903 /*
 904  * Like strtol, but also translates service names into port numbers
 905  * for some protocols.
 906  * In particular:
 907  *      proto == -1 disables the protocol check;
 908  *      proto == IPPROTO_ETHERTYPE looks up an internal table
 909  *      proto == <some value in /etc/protocols> matches the values there.
 910  * Returns *end == s in case the parameter is not found.
 911  */
 912 static int
 913 strtoport(char *s, char **end, int base, int proto)
 914 {
 915         char *p, *buf;
 916         char *s1;
 917         int i;
 918
 919         *end = s;               /* default - not found */
 920         if (*s == '\0')
 921                 return 0;       /* not found */
 922
 923         if (isdigit(*s))
 924                 return strtol(s, end, base);
 925
 926         /*
 927          * find separator. '\\' escapes the next char.
 928          */
 929         for (s1 = s; *s1 && (isalnum(*s1) || *s1 == '\\') ; s1++)
 930                 if (*s1 == '\\' && s1[1] != '\0')
 931                         s1++;
 932
 933         buf = safe_calloc(s1 - s + 1, 1);
 934
 935         /*
 936          * copy into a buffer skipping backslashes
 937          */
 938         for (p = s, i = 0; p != s1 ; p++)
 939                 if (*p != '\\')
 940                         buf[i++] = *p;
 941         buf[i++] = '\0';
 942
 943         if (proto == IPPROTO_ETHERTYPE) {
 944                 i = match_token(ether_types, buf);
 945                 free(buf);
 946                 if (i != -1) {  /* found */
 947                         *end = s1;
 948                         return i;
 949                 }
 950         } else {
 951                 struct protoent *pe = NULL;
 952                 struct servent *se;
 953
 954                 if (proto != 0)
 955                         pe = getprotobynumber(proto);
 956                 setservent(1);
 957                 se = getservbyname(buf, pe ? pe->p_name : NULL);
 958                 free(buf);
 959                 if (se != NULL) {
 960                         *end = s1;
 961                         return ntohs(se->s_port);
 962                 }
 963         }
 964         return 0;       /* not found */
 965 }
 966
 967 /*
 968  * Fill the body of the command with the list of port ranges.
 969  */
 970 static int
 971 fill_newports(ipfw_insn_u16 *cmd, char *av, int proto, int cblen)
 972 {
 973         uint16_t a, b, *p = cmd->ports;
 974         int i = 0;
 975         char *s = av;
 976
 977         while (*s) {
 978                 a = strtoport(av, &s, 0, proto);
 979                 if (s == av)                    /* empty or invalid argument */
 980                         return (0);
 981
 982                 CHECK_LENGTH(cblen, i + 2);
 983
 984                 switch (*s) {
 985                 case '-':                       /* a range */
 986                         av = s + 1;
 987                         b = strtoport(av, &s, 0, proto);
 988                         /* Reject expressions like '1-abc' or '1-2-3'. */
 989                         if (s == av || (*s != ',' && *s != '\0'))
 990                                 return (0);
 991                         p[0] = a;
 992                         p[1] = b;
 993                         break;
 994                 case ',':                       /* comma separated list */
 995                 case '\0':
 996                         p[0] = p[1] = a;
 997                         break;
 998                 default:
 999                         warnx("port list: invalid separator <%c> in <%s>",
1000                                 *s, av);
1001                         return (0);
1002                 }
1003
1004                 i++;
1005                 p += 2;
1006                 av = s + 1;
1007         }
1008         if (i > 0) {
1009                 if (i + 1 > F_LEN_MASK)
1010                         errx(EX_DATAERR, "too many ports/ranges\n");
1011                 cmd->o.len |= i + 1;    /* leave F_NOT and F_OR untouched */
1012         }
1013         return (i);
1014 }
1015
1016 /*
1017  * Fill the body of the command with the list of DiffServ codepoints.
1018  */
1019 static void
1020 fill_dscp(ipfw_insn *cmd, char *av, int cblen)
1021 {
1022         uint32_t *low, *high;
1023         char *s = av, *a;
1024         int code;
1025
1026         cmd->opcode = O_DSCP;
1027         cmd->len |= F_INSN_SIZE(ipfw_insn_u32) + 1;
1028
1029         CHECK_CMDLEN;
1030
1031         low = (uint32_t *)(cmd + 1);
1032         high = low + 1;
1033
1034         *low = 0;
1035         *high = 0;
1036
1037         while (s != NULL) {
1038                 a = strchr(s, ',');
1039
1040                 if (a != NULL)
1041                         *a++ = '\0';
1042
1043                 if (isalpha(*s)) {
1044                         if ((code = match_token(f_ipdscp, s)) == -1)
1045                                 errx(EX_DATAERR, "Unknown DSCP code");
1046                 } else {
1047                         code = strtoul(s, NULL, 10);
1048                         if (code < 0 || code > 63)
1049                                 errx(EX_DATAERR, "Invalid DSCP value");
1050                 }
1051
1052                 if (code >= 32)
1053                         *high |= 1 << (code - 32);
1054                 else
1055                         *low |= 1 << code;
1056
1057                 s = a;
1058         }
1059 }
1060
1061 static struct _s_x icmpcodes[] = {
1062       { "net",                  ICMP_UNREACH_NET },
1063       { "host",                 ICMP_UNREACH_HOST },
1064       { "protocol",             ICMP_UNREACH_PROTOCOL },
1065       { "port",                 ICMP_UNREACH_PORT },
1066       { "needfrag",             ICMP_UNREACH_NEEDFRAG },
1067       { "srcfail",              ICMP_UNREACH_SRCFAIL },
1068       { "net-unknown",          ICMP_UNREACH_NET_UNKNOWN },
1069       { "host-unknown",         ICMP_UNREACH_HOST_UNKNOWN },
1070       { "isolated",             ICMP_UNREACH_ISOLATED },
1071       { "net-prohib",           ICMP_UNREACH_NET_PROHIB },
1072       { "host-prohib",          ICMP_UNREACH_HOST_PROHIB },
1073       { "tosnet",               ICMP_UNREACH_TOSNET },
1074       { "toshost",              ICMP_UNREACH_TOSHOST },
1075       { "filter-prohib",        ICMP_UNREACH_FILTER_PROHIB },
1076       { "host-precedence",      ICMP_UNREACH_HOST_PRECEDENCE },
1077       { "precedence-cutoff",    ICMP_UNREACH_PRECEDENCE_CUTOFF },
1078       { NULL, 0 }
1079 };
1080
1081 static void
1082 fill_reject_code(u_short *codep, char *str)
1083 {
1084         int val;
1085         char *s;
1086
1087         val = strtoul(str, &s, 0);
1088         if (s == str || *s != '\0' || val >= 0x100)
1089                 val = match_token(icmpcodes, str);
1090         if (val < 0)
1091                 errx(EX_DATAERR, "unknown ICMP unreachable code ``%s''", str);
1092         *codep = val;
1093         return;
1094 }
1095
1096 static void
1097 print_reject_code(struct buf_pr *bp, uint16_t code)
1098 {
1099         char const *s;
1100
1101         if ((s = match_value(icmpcodes, code)) != NULL)
1102                 bprintf(bp, "unreach %s", s);
1103         else
1104                 bprintf(bp, "unreach %u", code);
1105 }
1106
1107 /*
1108  * Returns the number of bits set (from left) in a contiguous bitmask,
1109  * or -1 if the mask is not contiguous.
1110  * XXX this needs a proper fix.
1111  * This effectively works on masks in big-endian (network) format.
1112  * when compiled on little endian architectures.
1113  *
1114  * First bit is bit 7 of the first byte -- note, for MAC addresses,
1115  * the first bit on the wire is bit 0 of the first byte.
1116  * len is the max length in bits.
1117  */
1118 int
1119 contigmask(uint8_t *p, int len)
1120 {
1121         int i, n;
1122
1123         for (i=0; i<len ; i++)
1124                 if ( (p[i/8] & (1 << (7 - (i%8)))) == 0) /* first bit unset */
1125                         break;
1126         for (n=i+1; n < len; n++)
1127                 if ( (p[n/8] & (1 << (7 - (n%8)))) != 0)
1128                         return -1; /* mask not contiguous */
1129         return i;
1130 }
1131
1132 /*
1133  * print flags set/clear in the two bitmasks passed as parameters.
1134  * There is a specialized check for f_tcpflags.
1135  */
1136 static void
1137 print_flags(struct buf_pr *bp, char const *name, ipfw_insn *cmd,
1138     struct _s_x *list)
1139 {
1140         char const *comma = "";
1141         int i;
1142         uint8_t set = cmd->arg1 & 0xff;
1143         uint8_t clear = (cmd->arg1 >> 8) & 0xff;
1144
1145         if (list == f_tcpflags && set == TH_SYN && clear == TH_ACK) {
1146                 bprintf(bp, " setup");
1147                 return;
1148         }
1149
1150         bprintf(bp, " %s ", name);
1151         for (i=0; list[i].x != 0; i++) {
1152                 if (set & list[i].x) {
1153                         set &= ~list[i].x;
1154                         bprintf(bp, "%s%s", comma, list[i].s);
1155                         comma = ",";
1156                 }
1157                 if (clear & list[i].x) {
1158                         clear &= ~list[i].x;
1159                         bprintf(bp, "%s!%s", comma, list[i].s);
1160                         comma = ",";
1161                 }
1162         }
1163 }
1164
1165
1166 /*
1167  * Print the ip address contained in a command.
1168  */
1169 static void
1170 print_ip(struct buf_pr *bp, struct format_opts *fo, ipfw_insn_ip *cmd,
1171     char const *s)
1172 {
1173         struct hostent *he = NULL;
1174         struct in_addr *ia;
1175         uint32_t len = F_LEN((ipfw_insn *)cmd);
1176         uint32_t *a = ((ipfw_insn_u32 *)cmd)->d;
1177         char *t;
1178
1179         if (cmd->o.opcode == O_IP_DST_LOOKUP && len > F_INSN_SIZE(ipfw_insn_u32)) {
1180                 uint32_t d = a[1];
1181                 const char *arg = "<invalid>";
1182
1183                 if (d < sizeof(lookup_key)/sizeof(lookup_key[0]))
1184                         arg = match_value(rule_options, lookup_key[d]);
1185                 t = table_search_ctlv(fo->tstate, ((ipfw_insn *)cmd)->arg1);
1186                 bprintf(bp, "%s lookup %s %s", cmd->o.len & F_NOT ? " not": "",
1187                         arg, t);
1188                 return;
1189         }
1190         bprintf(bp, "%s%s ", cmd->o.len & F_NOT ? " not": "", s);
1191
1192         if (cmd->o.opcode == O_IP_SRC_ME || cmd->o.opcode == O_IP_DST_ME) {
1193                 bprintf(bp, "me");
1194                 return;
1195         }
1196         if (cmd->o.opcode == O_IP_SRC_LOOKUP ||
1197             cmd->o.opcode == O_IP_DST_LOOKUP) {
1198                 t = table_search_ctlv(fo->tstate, ((ipfw_insn *)cmd)->arg1);
1199                 bprintf(bp, "table(%s", t);
1200                 if (len == F_INSN_SIZE(ipfw_insn_u32))
1201                         bprintf(bp, ",%u", *a);
1202                 bprintf(bp, ")");
1203                 return;
1204         }
1205         if (cmd->o.opcode == O_IP_SRC_SET || cmd->o.opcode == O_IP_DST_SET) {
1206                 uint32_t x, *map = (uint32_t *)&(cmd->mask);
1207                 int i, j;
1208                 char comma = '{';
1209
1210                 x = cmd->o.arg1 - 1;
1211                 x = htonl( ~x );
1212                 cmd->addr.s_addr = htonl(cmd->addr.s_addr);
1213                 bprintf(bp, "%s/%d", inet_ntoa(cmd->addr),
1214                         contigmask((uint8_t *)&x, 32));
1215                 x = cmd->addr.s_addr = htonl(cmd->addr.s_addr);
1216                 x &= 0xff; /* base */
1217                 /*
1218                  * Print bits and ranges.
1219                  * Locate first bit set (i), then locate first bit unset (j).
1220                  * If we have 3+ consecutive bits set, then print them as a
1221                  * range, otherwise only print the initial bit and rescan.
1222                  */
1223                 for (i=0; i < cmd->o.arg1; i++)
1224                         if (map[i/32] & (1<<(i & 31))) {
1225                                 for (j=i+1; j < cmd->o.arg1; j++)
1226                                         if (!(map[ j/32] & (1<<(j & 31))))
1227                                                 break;
1228                                 bprintf(bp, "%c%d", comma, i+x);
1229                                 if (j>i+2) { /* range has at least 3 elements */
1230                                         bprintf(bp, "-%d", j-1+x);
1231                                         i = j-1;
1232                                 }
1233                                 comma = ',';
1234                         }
1235                 bprintf(bp, "}");
1236                 return;
1237         }
1238         /*
1239          * len == 2 indicates a single IP, whereas lists of 1 or more
1240          * addr/mask pairs have len = (2n+1). We convert len to n so we
1241          * use that to count the number of entries.
1242          */
1243     for (len = len / 2; len > 0; len--, a += 2) {
1244         int mb =        /* mask length */
1245             (cmd->o.opcode == O_IP_SRC || cmd->o.opcode == O_IP_DST) ?
1246                 32 : contigmask((uint8_t *)&(a[1]), 32);
1247         if (mb == 32 && co.do_resolv)
1248                 he = gethostbyaddr((char *)&(a[0]), sizeof(u_long), AF_INET);
1249         if (he != NULL)         /* resolved to name */
1250                 bprintf(bp, "%s", he->h_name);
1251         else if (mb == 0)       /* any */
1252                 bprintf(bp, "any");
1253         else {          /* numeric IP followed by some kind of mask */
1254                 ia = (struct in_addr *)&a[0];
1255                 bprintf(bp, "%s", inet_ntoa(*ia));
1256                 if (mb < 0) {
1257                         ia = (struct in_addr *)&a[1];
1258                         bprintf(bp, ":%s", inet_ntoa(*ia));
1259                 } else if (mb < 32)
1260                         bprintf(bp, "/%d", mb);
1261         }
1262         if (len > 1)
1263                 bprintf(bp, ",");
1264     }
1265 }
1266
1267 /*
1268  * prints a MAC address/mask pair
1269  */
1270 static void
1271 print_mac(struct buf_pr *bp, uint8_t *addr, uint8_t *mask)
1272 {
1273         int l = contigmask(mask, 48);
1274
1275         if (l == 0)
1276                 bprintf(bp, " any");
1277         else {
1278                 bprintf(bp, " %02x:%02x:%02x:%02x:%02x:%02x",
1279                     addr[0], addr[1], addr[2], addr[3], addr[4], addr[5]);
1280                 if (l == -1)
1281                         bprintf(bp, "&%02x:%02x:%02x:%02x:%02x:%02x",
1282                             mask[0], mask[1], mask[2],
1283                             mask[3], mask[4], mask[5]);
1284                 else if (l < 48)
1285                         bprintf(bp, "/%d", l);
1286         }
1287 }
1288
1289 static void
1290 fill_icmptypes(ipfw_insn_u32 *cmd, char *av)
1291 {
1292         uint8_t type;
1293
1294         cmd->d[0] = 0;
1295         while (*av) {
1296                 if (*av == ',')
1297                         av++;
1298
1299                 type = strtoul(av, &av, 0);
1300
1301                 if (*av != ',' && *av != '\0')
1302                         errx(EX_DATAERR, "invalid ICMP type");
1303
1304                 if (type > 31)
1305                         errx(EX_DATAERR, "ICMP type out of range");
1306
1307                 cmd->d[0] |= 1 << type;
1308         }
1309         cmd->o.opcode = O_ICMPTYPE;
1310         cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32);
1311 }
1312
1313 static void
1314 print_icmptypes(struct buf_pr *bp, ipfw_insn_u32 *cmd)
1315 {
1316         int i;
1317         char sep= ' ';
1318
1319         bprintf(bp, " icmptypes");
1320         for (i = 0; i < 32; i++) {
1321                 if ( (cmd->d[0] & (1 << (i))) == 0)
1322                         continue;
1323                 bprintf(bp, "%c%d", sep, i);
1324                 sep = ',';
1325         }
1326 }
1327
1328 static void
1329 print_dscp(struct buf_pr *bp, ipfw_insn_u32 *cmd)
1330 {
1331         int i = 0;
1332         uint32_t *v;
1333         char sep= ' ';
1334         const char *code;
1335
1336         bprintf(bp, " dscp");
1337         v = cmd->d;
1338         while (i < 64) {
1339                 if (*v & (1 << i)) {
1340                         if ((code = match_value(f_ipdscp, i)) != NULL)
1341                                 bprintf(bp, "%c%s", sep, code);
1342                         else
1343                                 bprintf(bp, "%c%d", sep, i);
1344                         sep = ',';
1345                 }
1346
1347                 if ((++i % 32) == 0)
1348                         v++;
1349         }
1350 }
1351
1352 /*
1353  * show_ipfw() prints the body of an ipfw rule.
1354  * Because the standard rule has at least proto src_ip dst_ip, we use
1355  * a helper function to produce these entries if not provided explicitly.
1356  * The first argument is the list of fields we have, the second is
1357  * the list of fields we want to be printed.
1358  *
1359  * Special cases if we have provided a MAC header:
1360  *   + if the rule does not contain IP addresses/ports, do not print them;
1361  *   + if the rule does not contain an IP proto, print "all" instead of "ip";
1362  *
1363  * Once we have 'have_options', IP header fields are printed as options.
1364  */
1365 #define HAVE_PROTO      0x0001
1366 #define HAVE_SRCIP      0x0002
1367 #define HAVE_DSTIP      0x0004
1368 #define HAVE_PROTO4     0x0008
1369 #define HAVE_PROTO6     0x0010
1370 #define HAVE_IP         0x0100
1371 #define HAVE_OPTIONS    0x8000
1372
1373 static void
1374 show_prerequisites(struct buf_pr *bp, int *flags, int want, int cmd)
1375 {
1376         (void)cmd;      /* UNUSED */
1377         if (co.comment_only)
1378                 return;
1379         if ( (*flags & HAVE_IP) == HAVE_IP)
1380                 *flags |= HAVE_OPTIONS;
1381
1382         if ( !(*flags & HAVE_OPTIONS)) {
1383                 if ( !(*flags & HAVE_PROTO) && (want & HAVE_PROTO)) {
1384                         if ( (*flags & HAVE_PROTO4))
1385                                 bprintf(bp, " ip4");
1386                         else if ( (*flags & HAVE_PROTO6))
1387                                 bprintf(bp, " ip6");
1388                         else
1389                                 bprintf(bp, " ip");
1390                 }
1391                 if ( !(*flags & HAVE_SRCIP) && (want & HAVE_SRCIP))
1392                         bprintf(bp, " from any");
1393                 if ( !(*flags & HAVE_DSTIP) && (want & HAVE_DSTIP))
1394                         bprintf(bp, " to any");
1395         }
1396         *flags |= want;
1397 }
1398
1399 static void
1400 show_static_rule(struct cmdline_opts *co, struct format_opts *fo,
1401     struct buf_pr *bp, struct ip_fw_rule *rule, struct ip_fw_bcounter *cntr)
1402 {
1403         static int twidth = 0;
1404         int l;
1405         ipfw_insn *cmd, *has_eaction = NULL, *tagptr = NULL;
1406         const char *comment = NULL;     /* ptr to comment if we have one */
1407         const char *ename;
1408         int proto = 0;          /* default */
1409         int flags = 0;  /* prerequisites */
1410         ipfw_insn_log *logptr = NULL; /* set if we find an O_LOG */
1411         ipfw_insn_altq *altqptr = NULL; /* set if we find an O_ALTQ */
1412         int or_block = 0;       /* we are in an or block */
1413         uint32_t uval;
1414
1415         if ((fo->set_mask & (1 << rule->set)) == 0) {
1416                 /* disabled mask */
1417                 if (!co->show_sets)
1418                         return;
1419                 else
1420                         bprintf(bp, "# DISABLED ");
1421         }
1422         bprintf(bp, "%05u ", rule->rulenum);
1423
1424         /* Print counters if enabled */
1425         if (fo->pcwidth > 0 || fo->bcwidth > 0) {
1426                 pr_u64(bp, &cntr->pcnt, fo->pcwidth);
1427                 pr_u64(bp, &cntr->bcnt, fo->bcwidth);
1428         }
1429
1430         if (co->do_time == 2)
1431                 bprintf(bp, "%10u ", cntr->timestamp);
1432         else if (co->do_time == 1) {
1433                 char timestr[30];
1434                 time_t t = (time_t)0;
1435
1436                 if (twidth == 0) {
1437                         strcpy(timestr, ctime(&t));
1438                         *strchr(timestr, '\n') = '\0';
1439                         twidth = strlen(timestr);
1440                 }
1441                 if (cntr->timestamp > 0) {
1442                         t = _long_to_time(cntr->timestamp);
1443
1444                         strcpy(timestr, ctime(&t));
1445                         *strchr(timestr, '\n') = '\0';
1446                         bprintf(bp, "%s ", timestr);
1447                 } else {
1448                         bprintf(bp, "%*s", twidth, " ");
1449                 }
1450         }
1451
1452         if (co->show_sets)
1453                 bprintf(bp, "set %d ", rule->set);
1454
1455         /*
1456          * print the optional "match probability"
1457          */
1458         if (rule->cmd_len > 0) {
1459                 cmd = rule->cmd ;
1460                 if (cmd->opcode == O_PROB) {
1461                         ipfw_insn_u32 *p = (ipfw_insn_u32 *)cmd;
1462                         double d = 1.0 * p->d[0];
1463
1464                         d = (d / 0x7fffffff);
1465                         bprintf(bp, "prob %f ", d);
1466                 }
1467         }
1468
1469         /*
1470          * first print actions
1471          */
1472         for (l = rule->cmd_len - rule->act_ofs, cmd = ACTION_PTR(rule);
1473                         l > 0 ; l -= F_LEN(cmd), cmd += F_LEN(cmd)) {
1474                 switch(cmd->opcode) {
1475                 case O_CHECK_STATE:
1476                         bprintf(bp, "check-state");
1477                         if (cmd->arg1 != 0)
1478                                 ename = object_search_ctlv(fo->tstate,
1479                                     cmd->arg1, IPFW_TLV_STATE_NAME);
1480                         else
1481                                 ename = NULL;
1482                         bprintf(bp, " %s", ename ? ename: "any");
1483                         /* avoid printing anything else */
1484                         flags = HAVE_PROTO | HAVE_SRCIP |
1485                                 HAVE_DSTIP | HAVE_IP;
1486                         break;
1487
1488                 case O_ACCEPT:
1489                         bprintf(bp, "allow");
1490                         break;
1491
1492                 case O_COUNT:
1493                         bprintf(bp, "count");
1494                         break;
1495
1496                 case O_DENY:
1497                         bprintf(bp, "deny");
1498                         break;
1499
1500                 case O_REJECT:
1501                         if (cmd->arg1 == ICMP_REJECT_RST)
1502                                 bprintf(bp, "reset");
1503                         else if (cmd->arg1 == ICMP_UNREACH_HOST)
1504                                 bprintf(bp, "reject");
1505                         else
1506                                 print_reject_code(bp, cmd->arg1);
1507                         break;
1508
1509                 case O_UNREACH6:
1510                         if (cmd->arg1 == ICMP6_UNREACH_RST)
1511                                 bprintf(bp, "reset6");
1512                         else
1513                                 print_unreach6_code(bp, cmd->arg1);
1514                         break;
1515
1516                 case O_SKIPTO:
1517                         bprint_uint_arg(bp, "skipto ", cmd->arg1);
1518                         break;
1519
1520                 case O_PIPE:
1521                         bprint_uint_arg(bp, "pipe ", cmd->arg1);
1522                         break;
1523
1524                 case O_QUEUE:
1525                         bprint_uint_arg(bp, "queue ", cmd->arg1);
1526                         break;
1527
1528                 case O_DIVERT:
1529                         bprint_uint_arg(bp, "divert ", cmd->arg1);
1530                         break;
1531
1532                 case O_TEE:
1533                         bprint_uint_arg(bp, "tee ", cmd->arg1);
1534                         break;
1535
1536                 case O_NETGRAPH:
1537                         bprint_uint_arg(bp, "netgraph ", cmd->arg1);
1538                         break;
1539
1540                 case O_NGTEE:
1541                         bprint_uint_arg(bp, "ngtee ", cmd->arg1);
1542                         break;
1543
1544                 case O_FORWARD_IP:
1545                     {
1546                         ipfw_insn_sa *s = (ipfw_insn_sa *)cmd;
1547
1548                         if (s->sa.sin_addr.s_addr == INADDR_ANY) {
1549                                 bprintf(bp, "fwd tablearg");
1550                         } else {
1551                                 bprintf(bp, "fwd %s",inet_ntoa(s->sa.sin_addr));
1552                         }
1553                         if (s->sa.sin_port)
1554                                 bprintf(bp, ",%d", s->sa.sin_port);
1555                     }
1556                         break;
1557
1558                 case O_FORWARD_IP6:
1559                     {
1560                         char buf[INET6_ADDRSTRLEN + IF_NAMESIZE + 2];
1561                         ipfw_insn_sa6 *s = (ipfw_insn_sa6 *)cmd;
1562
1563                         bprintf(bp, "fwd ");
1564                         if (getnameinfo((const struct sockaddr *)&s->sa,
1565                             sizeof(struct sockaddr_in6), buf, sizeof(buf),
1566                             NULL, 0, NI_NUMERICHOST) == 0)
1567                                 bprintf(bp, "%s", buf);
1568                         if (s->sa.sin6_port)
1569                                 bprintf(bp, ",%d", s->sa.sin6_port);
1570                     }
1571                         break;
1572
1573                 case O_LOG: /* O_LOG is printed last */
1574                         logptr = (ipfw_insn_log *)cmd;
1575                         break;
1576
1577                 case O_ALTQ: /* O_ALTQ is printed after O_LOG */
1578                         altqptr = (ipfw_insn_altq *)cmd;
1579                         break;
1580
1581                 case O_TAG:
1582                         tagptr = cmd;
1583                         break;
1584
1585                 case O_NAT:
1586                         if (cmd->arg1 != 0)
1587                                 bprint_uint_arg(bp, "nat ", cmd->arg1);
1588                         else
1589                                 bprintf(bp, "nat global");
1590                         break;
1591
1592                 case O_SETFIB:
1593                         bprint_uint_arg(bp, "setfib ", cmd->arg1 & 0x7FFF);
1594                         break;
1595
1596                 case O_EXTERNAL_ACTION: {
1597                         /*
1598                          * The external action can consists of two following
1599                          * each other opcodes - O_EXTERNAL_ACTION and
1600                          * O_EXTERNAL_INSTANCE. The first contains the ID of
1601                          * name of external action. The second contains the ID
1602                          * of name of external action instance.
1603                          * NOTE: in case when external action has no named
1604                          * instances support, the second opcode isn't needed.
1605                          */
1606                         has_eaction = cmd;
1607                         ename = object_search_ctlv(fo->tstate, cmd->arg1,
1608                             IPFW_TLV_EACTION);
1609                         if (match_token(rule_eactions, ename) != -1)
1610                                 bprintf(bp, "%s", ename);
1611                         else
1612                                 bprintf(bp, "eaction %s", ename);
1613                         break;
1614                 }
1615
1616                 case O_EXTERNAL_INSTANCE: {
1617                         if (has_eaction == NULL)
1618                                 break;
1619                         /*
1620                          * XXX: we need to teach ipfw(9) to rewrite opcodes
1621                          * in the user buffer on rule addition. When we add
1622                          * the rule, we specify zero TLV type for
1623                          * O_EXTERNAL_INSTANCE object. To show correct
1624                          * rule after `ipfw add` we need to search instance
1625                          * name with zero type. But when we do `ipfw show`
1626                          * we calculate TLV type using IPFW_TLV_EACTION_NAME()
1627                          * macro.
1628                          */
1629                         ename = object_search_ctlv(fo->tstate, cmd->arg1, 0);
1630                         if (ename == NULL)
1631                                 ename = object_search_ctlv(fo->tstate,
1632                                     cmd->arg1,
1633                                     IPFW_TLV_EACTION_NAME(has_eaction->arg1));
1634                         bprintf(bp, " %s", ename);
1635                         break;
1636                 }
1637
1638                 case O_SETDSCP:
1639                     {
1640                         const char *code;
1641
1642                         if (cmd->arg1 == IP_FW_TARG) {
1643                                 bprint_uint_arg(bp, "setdscp ", cmd->arg1);
1644                                 break;
1645                         }
1646                         uval = cmd->arg1 & 0x3F;
1647                         if ((code = match_value(f_ipdscp, uval)) != NULL)
1648                                 bprintf(bp, "setdscp %s", code);
1649                         else
1650                                 bprint_uint_arg(bp, "setdscp ", uval);
1651                     }
1652                         break;
1653
1654                 case O_REASS:
1655                         bprintf(bp, "reass");
1656                         break;
1657
1658                 case O_CALLRETURN:
1659                         if (cmd->len & F_NOT)
1660                                 bprintf(bp, "return");
1661                         else
1662                                 bprint_uint_arg(bp, "call ", cmd->arg1);
1663                         break;
1664
1665                 default:
1666                         bprintf(bp, "** unrecognized action %d len %d ",
1667                                 cmd->opcode, cmd->len);
1668                 }
1669         }
1670         if (logptr) {
1671                 if (logptr->max_log > 0)
1672                         bprintf(bp, " log logamount %d", logptr->max_log);
1673                 else
1674                         bprintf(bp, " log");
1675         }
1676 #ifndef NO_ALTQ
1677         if (altqptr) {
1678                 print_altq_cmd(bp, altqptr);
1679         }
1680 #endif
1681         if (tagptr) {
1682                 if (tagptr->len & F_NOT)
1683                         bprint_uint_arg(bp, " untag ", tagptr->arg1);
1684                 else
1685                         bprint_uint_arg(bp, " tag ", tagptr->arg1);
1686         }
1687
1688         /*
1689          * then print the body.
1690          */
1691         for (l = rule->act_ofs, cmd = rule->cmd;
1692                         l > 0 ; l -= F_LEN(cmd) , cmd += F_LEN(cmd)) {
1693                 if ((cmd->len & F_OR) || (cmd->len & F_NOT))
1694                         continue;
1695                 if (cmd->opcode == O_IP4) {
1696                         flags |= HAVE_PROTO4;
1697                         break;
1698                 } else if (cmd->opcode == O_IP6) {
1699                         flags |= HAVE_PROTO6;
1700                         break;
1701                 }
1702         }
1703         if (rule->flags & IPFW_RULE_NOOPT) {    /* empty rules before options */
1704                 if (!co->do_compact) {
1705                         show_prerequisites(bp, &flags, HAVE_PROTO, 0);
1706                         bprintf(bp, " from any to any");
1707                 }
1708                 flags |= HAVE_IP | HAVE_OPTIONS | HAVE_PROTO |
1709                          HAVE_SRCIP | HAVE_DSTIP;
1710         }
1711
1712         if (co->comment_only)
1713                 comment = "...";
1714
1715         for (l = rule->act_ofs, cmd = rule->cmd;
1716                         l > 0 ; l -= F_LEN(cmd) , cmd += F_LEN(cmd)) {
1717                 /* useful alias */
1718                 ipfw_insn_u32 *cmd32 = (ipfw_insn_u32 *)cmd;
1719
1720                 if (co->comment_only) {
1721                         if (cmd->opcode != O_NOP)
1722                                 continue;
1723                         bprintf(bp, " // %s\n", (char *)(cmd + 1));
1724                         return;
1725                 }
1726
1727                 show_prerequisites(bp, &flags, 0, cmd->opcode);
1728
1729                 switch(cmd->opcode) {
1730                 case O_PROB:
1731                         break;  /* done already */
1732
1733                 case O_PROBE_STATE:
1734                         break; /* no need to print anything here */
1735
1736                 case O_IP_SRC:
1737                 case O_IP_SRC_LOOKUP:
1738                 case O_IP_SRC_MASK:
1739                 case O_IP_SRC_ME:
1740                 case O_IP_SRC_SET:
1741                         show_prerequisites(bp, &flags, HAVE_PROTO, 0);
1742                         if (!(flags & HAVE_SRCIP))
1743                                 bprintf(bp, " from");
1744                         if ((cmd->len & F_OR) && !or_block)
1745                                 bprintf(bp, " {");
1746                         print_ip(bp, fo, (ipfw_insn_ip *)cmd,
1747                                 (flags & HAVE_OPTIONS) ? " src-ip" : "");
1748                         flags |= HAVE_SRCIP;
1749                         break;
1750
1751                 case O_IP_DST:
1752                 case O_IP_DST_LOOKUP:
1753                 case O_IP_DST_MASK:
1754                 case O_IP_DST_ME:
1755                 case O_IP_DST_SET:
1756                         show_prerequisites(bp, &flags, HAVE_PROTO|HAVE_SRCIP, 0);
1757                         if (!(flags & HAVE_DSTIP))
1758                                 bprintf(bp, " to");
1759                         if ((cmd->len & F_OR) && !or_block)
1760                                 bprintf(bp, " {");
1761                         print_ip(bp, fo, (ipfw_insn_ip *)cmd,
1762                                 (flags & HAVE_OPTIONS) ? " dst-ip" : "");
1763                         flags |= HAVE_DSTIP;
1764                         break;
1765
1766                 case O_IP6_SRC:
1767                 case O_IP6_SRC_MASK:
1768                 case O_IP6_SRC_ME:
1769                         show_prerequisites(bp, &flags, HAVE_PROTO, 0);
1770                         if (!(flags & HAVE_SRCIP))
1771                                 bprintf(bp, " from");
1772                         if ((cmd->len & F_OR) && !or_block)
1773                                 bprintf(bp, " {");
1774                         print_ip6(bp, (ipfw_insn_ip6 *)cmd,
1775                             (flags & HAVE_OPTIONS) ? " src-ip6" : "");
1776                         flags |= HAVE_SRCIP | HAVE_PROTO;
1777                         break;
1778
1779                 case O_IP6_DST:
1780                 case O_IP6_DST_MASK:
1781                 case O_IP6_DST_ME:
1782                         show_prerequisites(bp, &flags, HAVE_PROTO|HAVE_SRCIP, 0);
1783                         if (!(flags & HAVE_DSTIP))
1784                                 bprintf(bp, " to");
1785                         if ((cmd->len & F_OR) && !or_block)
1786                                 bprintf(bp, " {");
1787                         print_ip6(bp, (ipfw_insn_ip6 *)cmd,
1788                             (flags & HAVE_OPTIONS) ? " dst-ip6" : "");
1789                         flags |= HAVE_DSTIP;
1790                         break;
1791
1792                 case O_FLOW6ID:
1793                         print_flow6id(bp, (ipfw_insn_u32 *) cmd );
1794                         flags |= HAVE_OPTIONS;
1795                         break;
1796
1797                 case O_IP_DSTPORT:
1798                         show_prerequisites(bp, &flags,
1799                                 HAVE_PROTO | HAVE_SRCIP |
1800                                 HAVE_DSTIP | HAVE_IP, 0);
1801                 case O_IP_SRCPORT:
1802                         if (flags & HAVE_DSTIP)
1803                                 flags |= HAVE_IP;
1804                         show_prerequisites(bp, &flags,
1805                                 HAVE_PROTO | HAVE_SRCIP, 0);
1806                         if ((cmd->len & F_OR) && !or_block)
1807                                 bprintf(bp, " {");
1808                         if (cmd->len & F_NOT)
1809                                 bprintf(bp, " not");
1810                         print_newports(bp, (ipfw_insn_u16 *)cmd, proto,
1811                                 (flags & HAVE_OPTIONS) ? cmd->opcode : 0);
1812                         break;
1813
1814                 case O_PROTO: {
1815                         struct protoent *pe = NULL;
1816
1817                         if ((cmd->len & F_OR) && !or_block)
1818                                 bprintf(bp, " {");
1819                         if (cmd->len & F_NOT)
1820                                 bprintf(bp, " not");
1821                         proto = cmd->arg1;
1822                         pe = getprotobynumber(cmd->arg1);
1823                         if ((flags & (HAVE_PROTO4 | HAVE_PROTO6)) &&
1824                             !(flags & HAVE_PROTO))
1825                                 show_prerequisites(bp, &flags,
1826                                     HAVE_PROTO | HAVE_IP | HAVE_SRCIP |
1827                                     HAVE_DSTIP | HAVE_OPTIONS, 0);
1828                         if (flags & HAVE_OPTIONS)
1829                                 bprintf(bp, " proto");
1830                         if (pe)
1831                                 bprintf(bp, " %s", pe->p_name);
1832                         else
1833                                 bprintf(bp, " %u", cmd->arg1);
1834                         }
1835                         flags |= HAVE_PROTO;
1836                         break;
1837
1838                 default: /*options ... */
1839                         if (!(cmd->len & (F_OR|F_NOT)))
1840                                 if (((cmd->opcode == O_IP6) &&
1841                                     (flags & HAVE_PROTO6)) ||
1842                                     ((cmd->opcode == O_IP4) &&
1843                                     (flags & HAVE_PROTO4)))
1844                                         break;
1845                         show_prerequisites(bp, &flags, HAVE_PROTO | HAVE_SRCIP |
1846                                     HAVE_DSTIP | HAVE_IP | HAVE_OPTIONS, 0);
1847                         if ((cmd->len & F_OR) && !or_block)
1848                                 bprintf(bp, " {");
1849                         if (cmd->len & F_NOT && cmd->opcode != O_IN)
1850                                 bprintf(bp, " not");
1851                         switch(cmd->opcode) {
1852                         case O_MACADDR2: {
1853                                 ipfw_insn_mac *m = (ipfw_insn_mac *)cmd;
1854
1855                                 bprintf(bp, " MAC");
1856                                 print_mac(bp, m->addr, m->mask);
1857                                 print_mac(bp, m->addr + 6, m->mask + 6);
1858                                 }
1859                                 break;
1860
1861                         case O_MAC_TYPE:
1862                                 print_newports(bp, (ipfw_insn_u16 *)cmd,
1863                                                 IPPROTO_ETHERTYPE, cmd->opcode);
1864                                 break;
1865
1866
1867                         case O_FRAG:
1868                                 bprintf(bp, " frag");
1869                                 break;
1870
1871                         case O_FIB:
1872                                 bprintf(bp, " fib %u", cmd->arg1 );
1873                                 break;
1874                         case O_SOCKARG:
1875                                 bprintf(bp, " sockarg");
1876                                 break;
1877
1878                         case O_IN:
1879                                 bprintf(bp, cmd->len & F_NOT ? " out" : " in");
1880                                 break;
1881
1882                         case O_DIVERTED:
1883                                 switch (cmd->arg1) {
1884                                 case 3:
1885                                         bprintf(bp, " diverted");
1886                                         break;
1887                                 case 1:
1888                                         bprintf(bp, " diverted-loopback");
1889                                         break;
1890                                 case 2:
1891                                         bprintf(bp, " diverted-output");
1892                                         break;
1893                                 default:
1894                                         bprintf(bp, " diverted-?<%u>", cmd->arg1);
1895                                         break;
1896                                 }
1897                                 break;
1898
1899                         case O_LAYER2:
1900                                 bprintf(bp, " layer2");
1901                                 break;
1902                         case O_XMIT:
1903                         case O_RECV:
1904                         case O_VIA:
1905                             {
1906                                 char const *s, *t;
1907                                 ipfw_insn_if *cmdif = (ipfw_insn_if *)cmd;
1908
1909                                 if (cmd->opcode == O_XMIT)
1910                                         s = "xmit";
1911                                 else if (cmd->opcode == O_RECV)
1912                                         s = "recv";
1913                                 else /* if (cmd->opcode == O_VIA) */
1914                                         s = "via";
1915                                 if (cmdif->name[0] == '\0')
1916                                         bprintf(bp, " %s %s", s,
1917                                             inet_ntoa(cmdif->p.ip));
1918                                 else if (cmdif->name[0] == '\1') {
1919                                         /* interface table */
1920                                         t = table_search_ctlv(fo->tstate,
1921                                             cmdif->p.kidx);
1922                                         bprintf(bp, " %s table(%s)", s, t);
1923                                 } else
1924                                         bprintf(bp, " %s %s", s, cmdif->name);
1925
1926                                 break;
1927                             }
1928                         case O_IP_FLOW_LOOKUP:
1929                             {
1930                                 char *t;
1931
1932                                 t = table_search_ctlv(fo->tstate, cmd->arg1);
1933                                 bprintf(bp, " flow table(%s", t);
1934                                 if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_u32))
1935                                         bprintf(bp, ",%u",
1936                                             ((ipfw_insn_u32 *)cmd)->d[0]);
1937                                 bprintf(bp, ")");
1938                                 break;
1939                             }
1940                         case O_IPID:
1941                                 if (F_LEN(cmd) == 1)
1942                                     bprintf(bp, " ipid %u", cmd->arg1 );
1943                                 else
1944                                     print_newports(bp, (ipfw_insn_u16 *)cmd, 0,
1945                                         O_IPID);
1946                                 break;
1947
1948                         case O_IPTTL:
1949                                 if (F_LEN(cmd) == 1)
1950                                     bprintf(bp, " ipttl %u", cmd->arg1 );
1951                                 else
1952                                     print_newports(bp, (ipfw_insn_u16 *)cmd, 0,
1953                                         O_IPTTL);
1954                                 break;
1955
1956                         case O_IPVER:
1957                                 bprintf(bp, " ipver %u", cmd->arg1 );
1958                                 break;
1959
1960                         case O_IPPRECEDENCE:
1961                                 bprintf(bp, " ipprecedence %u", cmd->arg1 >> 5);
1962                                 break;
1963
1964                         case O_DSCP:
1965                                 print_dscp(bp, (ipfw_insn_u32 *)cmd);
1966                                 break;
1967
1968                         case O_IPLEN:
1969                                 if (F_LEN(cmd) == 1)
1970                                     bprintf(bp, " iplen %u", cmd->arg1 );
1971                                 else
1972                                     print_newports(bp, (ipfw_insn_u16 *)cmd, 0,
1973                                         O_IPLEN);
1974                                 break;
1975
1976                         case O_IPOPT:
1977                                 print_flags(bp, "ipoptions", cmd, f_ipopts);
1978                                 break;
1979
1980                         case O_IPTOS:
1981                                 print_flags(bp, "iptos", cmd, f_iptos);
1982                                 break;
1983
1984                         case O_ICMPTYPE:
1985                                 print_icmptypes(bp, (ipfw_insn_u32 *)cmd);
1986                                 break;
1987
1988                         case O_ESTAB:
1989                                 bprintf(bp, " established");
1990                                 break;
1991
1992                         case O_TCPDATALEN:
1993                                 if (F_LEN(cmd) == 1)
1994                                     bprintf(bp, " tcpdatalen %u", cmd->arg1 );
1995                                 else
1996                                     print_newports(bp, (ipfw_insn_u16 *)cmd, 0,
1997                                         O_TCPDATALEN);
1998                                 break;
1999
2000                         case O_TCPFLAGS:
2001                                 print_flags(bp, "tcpflags", cmd, f_tcpflags);
2002                                 break;
2003
2004                         case O_TCPOPTS:
2005                                 print_flags(bp, "tcpoptions", cmd, f_tcpopts);
2006                                 break;
2007
2008                         case O_TCPWIN:
2009                                 if (F_LEN(cmd) == 1)
2010                                     bprintf(bp, " tcpwin %u", cmd->arg1);
2011                                 else
2012                                     print_newports(bp, (ipfw_insn_u16 *)cmd, 0,
2013                                         O_TCPWIN);
2014                                 break;
2015
2016                         case O_TCPACK:
2017                                 bprintf(bp, " tcpack %d", ntohl(cmd32->d[0]));
2018                                 break;
2019
2020                         case O_TCPSEQ:
2021                                 bprintf(bp, " tcpseq %d", ntohl(cmd32->d[0]));
2022                                 break;
2023
2024                         case O_UID:
2025                             {
2026                                 struct passwd *pwd = getpwuid(cmd32->d[0]);
2027
2028                                 if (pwd)
2029                                         bprintf(bp, " uid %s", pwd->pw_name);
2030                                 else
2031                                         bprintf(bp, " uid %u", cmd32->d[0]);
2032                             }
2033                                 break;
2034
2035                         case O_GID:
2036                             {
2037                                 struct group *grp = getgrgid(cmd32->d[0]);
2038
2039                                 if (grp)
2040                                         bprintf(bp, " gid %s", grp->gr_name);
2041                                 else
2042                                         bprintf(bp, " gid %u", cmd32->d[0]);
2043                             }
2044                                 break;
2045
2046                         case O_JAIL:
2047                                 bprintf(bp, " jail %d", cmd32->d[0]);
2048                                 break;
2049
2050                         case O_VERREVPATH:
2051                                 bprintf(bp, " verrevpath");
2052                                 break;
2053
2054                         case O_VERSRCREACH:
2055                                 bprintf(bp, " versrcreach");
2056                                 break;
2057
2058                         case O_ANTISPOOF:
2059                                 bprintf(bp, " antispoof");
2060                                 break;
2061
2062                         case O_IPSEC:
2063                                 bprintf(bp, " ipsec");
2064                                 break;
2065
2066                         case O_NOP:
2067                                 comment = (char *)(cmd + 1);
2068                                 break;
2069
2070                         case O_KEEP_STATE:
2071                                 bprintf(bp, " keep-state");
2072                                 bprintf(bp, " %s",
2073                                     object_search_ctlv(fo->tstate, cmd->arg1,
2074                                     IPFW_TLV_STATE_NAME));
2075                                 break;
2076
2077                         case O_LIMIT: {
2078                                 struct _s_x *p = limit_masks;
2079                                 ipfw_insn_limit *c = (ipfw_insn_limit *)cmd;
2080                                 uint8_t x = c->limit_mask;
2081                                 char const *comma = " ";
2082
2083                                 bprintf(bp, " limit");
2084                                 for (; p->x != 0 ; p++)
2085                                         if ((x & p->x) == p->x) {
2086                                                 x &= ~p->x;
2087                                                 bprintf(bp, "%s%s", comma,p->s);
2088                                                 comma = ",";
2089                                         }
2090                                 bprint_uint_arg(bp, " ", c->conn_limit);
2091                                 bprintf(bp, " %s",
2092                                     object_search_ctlv(fo->tstate, cmd->arg1,
2093                                     IPFW_TLV_STATE_NAME));
2094                                 break;
2095                         }
2096
2097                         case O_IP6:
2098                                 bprintf(bp, " ip6");
2099                                 break;
2100
2101                         case O_IP4:
2102                                 bprintf(bp, " ip4");
2103                                 break;
2104
2105                         case O_ICMP6TYPE:
2106                                 print_icmp6types(bp, (ipfw_insn_u32 *)cmd);
2107                                 break;
2108
2109                         case O_EXT_HDR:
2110                                 print_ext6hdr(bp, (ipfw_insn *)cmd);
2111                                 break;
2112
2113                         case O_TAGGED:
2114                                 if (F_LEN(cmd) == 1)
2115                                         bprint_uint_arg(bp, " tagged ",
2116                                             cmd->arg1);
2117                                 else
2118                                         print_newports(bp, (ipfw_insn_u16 *)cmd,
2119                                             0, O_TAGGED);
2120                                 break;
2121
2122                         default:
2123                                 bprintf(bp, " [opcode %d len %d]",
2124                                     cmd->opcode, cmd->len);
2125                         }
2126                 }
2127                 if (cmd->len & F_OR) {
2128                         bprintf(bp, " or");
2129                         or_block = 1;
2130                 } else if (or_block) {
2131                         bprintf(bp, " }");
2132                         or_block = 0;
2133                 }
2134         }
2135         show_prerequisites(bp, &flags, HAVE_PROTO | HAVE_SRCIP | HAVE_DSTIP
2136                                               | HAVE_IP, 0);
2137         if (comment)
2138                 bprintf(bp, " // %s", comment);
2139         bprintf(bp, "\n");
2140 }
2141
2142 static void
2143 show_dyn_state(struct cmdline_opts *co, struct format_opts *fo,
2144     struct buf_pr *bp, ipfw_dyn_rule *d)
2145 {
2146         struct protoent *pe;
2147         struct in_addr a;
2148         uint16_t rulenum;
2149         char buf[INET6_ADDRSTRLEN];
2150
2151         if (!co->do_expired) {
2152                 if (!d->expire && !(d->dyn_type == O_LIMIT_PARENT))
2153                         return;
2154         }
2155         bcopy(&d->rule, &rulenum, sizeof(rulenum));
2156         bprintf(bp, "%05d", rulenum);
2157         if (fo->pcwidth > 0 || fo->bcwidth > 0) {
2158                 bprintf(bp, " ");
2159                 pr_u64(bp, &d->pcnt, fo->pcwidth);
2160                 pr_u64(bp, &d->bcnt, fo->bcwidth);
2161                 bprintf(bp, "(%ds)", d->expire);
2162         }
2163         switch (d->dyn_type) {
2164         case O_LIMIT_PARENT:
2165                 bprintf(bp, " PARENT %d", d->count);
2166                 break;
2167         case O_LIMIT:
2168                 bprintf(bp, " LIMIT");
2169                 break;
2170         case O_KEEP_STATE: /* bidir, no mask */
2171                 bprintf(bp, " STATE");
2172                 break;
2173         }
2174
2175         if ((pe = getprotobynumber(d->id.proto)) != NULL)
2176                 bprintf(bp, " %s", pe->p_name);
2177         else
2178                 bprintf(bp, " proto %u", d->id.proto);
2179
2180         if (d->id.addr_type == 4) {
2181                 a.s_addr = htonl(d->id.src_ip);
2182                 bprintf(bp, " %s %d", inet_ntoa(a), d->id.src_port);
2183
2184                 a.s_addr = htonl(d->id.dst_ip);
2185                 bprintf(bp, " <-> %s %d", inet_ntoa(a), d->id.dst_port);
2186         } else if (d->id.addr_type == 6) {
2187                 bprintf(bp, " %s %d", inet_ntop(AF_INET6, &d->id.src_ip6, buf,
2188                     sizeof(buf)), d->id.src_port);
2189                 bprintf(bp, " <-> %s %d", inet_ntop(AF_INET6, &d->id.dst_ip6,
2190                     buf, sizeof(buf)), d->id.dst_port);
2191         } else
2192                 bprintf(bp, " UNKNOWN <-> UNKNOWN");
2193         if (d->kidx != 0)
2194                 bprintf(bp, " %s", object_search_ctlv(fo->tstate,
2195                     d->kidx, IPFW_TLV_STATE_NAME));
2196 }
2197
2198 static int
2199 do_range_cmd(int cmd, ipfw_range_tlv *rt)
2200 {
2201         ipfw_range_header rh;
2202         size_t sz;
2203
2204         memset(&rh, 0, sizeof(rh));
2205         memcpy(&rh.range, rt, sizeof(*rt));
2206         rh.range.head.length = sizeof(*rt);
2207         rh.range.head.type = IPFW_TLV_RANGE;
2208         sz = sizeof(rh);
2209
2210         if (do_get3(cmd, &rh.opheader, &sz) != 0)
2211                 return (-1);
2212         /* Save number of matched objects */
2213         rt->new_set = rh.range.new_set;
2214         return (0);
2215 }
2216
2217 /*
2218  * This one handles all set-related commands
2219  *      ipfw set { show | enable | disable }
2220  *      ipfw set swap X Y
2221  *      ipfw set move X to Y
2222  *      ipfw set move rule X to Y
2223  */
2224 void
2225 ipfw_sets_handler(char *av[])
2226 {
2227         uint32_t masks[2];
2228         int i;
2229         uint8_t cmd, rulenum;
2230         ipfw_range_tlv rt;
2231         char *msg;
2232         size_t size;
2233
2234         av++;
2235         memset(&rt, 0, sizeof(rt));
2236
2237         if (av[0] == NULL)
2238                 errx(EX_USAGE, "set needs command");
2239         if (_substrcmp(*av, "show") == 0) {
2240                 struct format_opts fo;
2241                 ipfw_cfg_lheader *cfg;
2242
2243                 memset(&fo, 0, sizeof(fo));
2244                 if (ipfw_get_config(&co, &fo, &cfg, &size) != 0)
2245                         err(EX_OSERR, "requesting config failed");
2246
2247                 for (i = 0, msg = "disable"; i < RESVD_SET; i++)
2248                         if ((cfg->set_mask & (1<<i)) == 0) {
2249                                 printf("%s %d", msg, i);
2250                                 msg = "";
2251                         }
2252                 msg = (cfg->set_mask != (uint32_t)-1) ? " enable" : "enable";
2253                 for (i = 0; i < RESVD_SET; i++)
2254                         if ((cfg->set_mask & (1<<i)) != 0) {
2255                                 printf("%s %d", msg, i);
2256                                 msg = "";
2257                         }
2258                 printf("\n");
2259                 free(cfg);
2260         } else if (_substrcmp(*av, "swap") == 0) {
2261                 av++;
2262                 if ( av[0] == NULL || av[1] == NULL )
2263                         errx(EX_USAGE, "set swap needs 2 set numbers\n");
2264                 rt.set = atoi(av[0]);
2265                 rt.new_set = atoi(av[1]);
2266                 if (!isdigit(*(av[0])) || rt.set > RESVD_SET)
2267                         errx(EX_DATAERR, "invalid set number %s\n", av[0]);
2268                 if (!isdigit(*(av[1])) || rt.new_set > RESVD_SET)
2269                         errx(EX_DATAERR, "invalid set number %s\n", av[1]);
2270                 i = do_range_cmd(IP_FW_SET_SWAP, &rt);
2271         } else if (_substrcmp(*av, "move") == 0) {
2272                 av++;
2273                 if (av[0] && _substrcmp(*av, "rule") == 0) {
2274                         rt.flags = IPFW_RCFLAG_RANGE; /* move rules to new set */
2275                         cmd = IP_FW_XMOVE;
2276                         av++;
2277                 } else
2278                         cmd = IP_FW_SET_MOVE; /* Move set to new one */
2279                 if (av[0] == NULL || av[1] == NULL || av[2] == NULL ||
2280                                 av[3] != NULL ||  _substrcmp(av[1], "to") != 0)
2281                         errx(EX_USAGE, "syntax: set move [rule] X to Y\n");
2282                 rulenum = atoi(av[0]);
2283                 rt.new_set = atoi(av[2]);
2284                 if (cmd == IP_FW_XMOVE) {
2285                         rt.start_rule = rulenum;
2286                         rt.end_rule = rulenum;
2287                 } else
2288                         rt.set = rulenum;
2289                 rt.new_set = atoi(av[2]);
2290                 if (!isdigit(*(av[0])) || (cmd == 3 && rt.set > RESVD_SET) ||
2291                         (cmd == 2 && rt.start_rule == IPFW_DEFAULT_RULE) )
2292                         errx(EX_DATAERR, "invalid source number %s\n", av[0]);
2293                 if (!isdigit(*(av[2])) || rt.new_set > RESVD_SET)
2294                         errx(EX_DATAERR, "invalid dest. set %s\n", av[1]);
2295                 i = do_range_cmd(cmd, &rt);
2296                 if (i < 0)
2297                         err(EX_OSERR, "failed to move %s",
2298                             cmd == IP_FW_SET_MOVE ? "set": "rule");
2299         } else if (_substrcmp(*av, "disable") == 0 ||
2300                    _substrcmp(*av, "enable") == 0 ) {
2301                 int which = _substrcmp(*av, "enable") == 0 ? 1 : 0;
2302
2303                 av++;
2304                 masks[0] = masks[1] = 0;
2305
2306                 while (av[0]) {
2307                         if (isdigit(**av)) {
2308                                 i = atoi(*av);
2309                                 if (i < 0 || i > RESVD_SET)
2310                                         errx(EX_DATAERR,
2311                                             "invalid set number %d\n", i);
2312                                 masks[which] |= (1<<i);
2313                         } else if (_substrcmp(*av, "disable") == 0)
2314                                 which = 0;
2315                         else if (_substrcmp(*av, "enable") == 0)
2316                                 which = 1;
2317                         else
2318                                 errx(EX_DATAERR,
2319                                         "invalid set command %s\n", *av);
2320                         av++;
2321                 }
2322                 if ( (masks[0] & masks[1]) != 0 )
2323                         errx(EX_DATAERR,
2324                             "cannot enable and disable the same set\n");
2325
2326                 rt.set = masks[0];
2327                 rt.new_set = masks[1];
2328                 i = do_range_cmd(IP_FW_SET_ENABLE, &rt);
2329                 if (i)
2330                         warn("set enable/disable: setsockopt(IP_FW_SET_ENABLE)");
2331         } else
2332                 errx(EX_USAGE, "invalid set command %s\n", *av);
2333 }
2334
2335 void
2336 ipfw_sysctl_handler(char *av[], int which)
2337 {
2338         av++;
2339
2340         if (av[0] == NULL) {
2341                 warnx("missing keyword to enable/disable\n");
2342         } else if (_substrcmp(*av, "firewall") == 0) {
2343                 sysctlbyname("net.inet.ip.fw.enable", NULL, 0,
2344                     &which, sizeof(which));
2345                 sysctlbyname("net.inet6.ip6.fw.enable", NULL, 0,
2346                     &which, sizeof(which));
2347         } else if (_substrcmp(*av, "one_pass") == 0) {
2348                 sysctlbyname("net.inet.ip.fw.one_pass", NULL, 0,
2349                     &which, sizeof(which));
2350         } else if (_substrcmp(*av, "debug") == 0) {
2351                 sysctlbyname("net.inet.ip.fw.debug", NULL, 0,
2352                     &which, sizeof(which));
2353         } else if (_substrcmp(*av, "verbose") == 0) {
2354                 sysctlbyname("net.inet.ip.fw.verbose", NULL, 0,
2355                     &which, sizeof(which));
2356         } else if (_substrcmp(*av, "dyn_keepalive") == 0) {
2357                 sysctlbyname("net.inet.ip.fw.dyn_keepalive", NULL, 0,
2358                     &which, sizeof(which));
2359 #ifndef NO_ALTQ
2360         } else if (_substrcmp(*av, "altq") == 0) {
2361                 altq_set_enabled(which);
2362 #endif
2363         } else {
2364                 warnx("unrecognize enable/disable keyword: %s\n", *av);
2365         }
2366 }
2367
2368 typedef void state_cb(struct cmdline_opts *co, struct format_opts *fo,
2369     void *arg, void *state);
2370
2371 static void
2372 prepare_format_dyn(struct cmdline_opts *co, struct format_opts *fo,
2373     void *arg, void *_state)
2374 {
2375         ipfw_dyn_rule *d;
2376         int width;
2377         uint8_t set;
2378
2379         d = (ipfw_dyn_rule *)_state;
2380         /* Count _ALL_ states */
2381         fo->dcnt++;
2382
2383         if (fo->show_counters == 0)
2384                 return;
2385
2386         if (co->use_set) {
2387                 /* skip states from another set */
2388                 bcopy((char *)&d->rule + sizeof(uint16_t), &set,
2389                     sizeof(uint8_t));
2390                 if (set != co->use_set - 1)
2391                         return;
2392         }
2393
2394         width = pr_u64(NULL, &d->pcnt, 0);
2395         if (width > fo->pcwidth)
2396                 fo->pcwidth = width;
2397
2398         width = pr_u64(NULL, &d->bcnt, 0);
2399         if (width > fo->bcwidth)
2400                 fo->bcwidth = width;
2401 }
2402
2403 static int
2404 foreach_state(struct cmdline_opts *co, struct format_opts *fo,
2405     caddr_t base, size_t sz, state_cb dyn_bc, void *dyn_arg)
2406 {
2407         int ttype;
2408         state_cb *fptr;
2409         void *farg;
2410         ipfw_obj_tlv *tlv;
2411         ipfw_obj_ctlv *ctlv;
2412
2413         fptr = NULL;
2414         ttype = 0;
2415
2416         while (sz > 0) {
2417                 ctlv = (ipfw_obj_ctlv *)base;
2418                 switch (ctlv->head.type) {
2419                 case IPFW_TLV_DYNSTATE_LIST:
2420                         base += sizeof(*ctlv);
2421                         sz -= sizeof(*ctlv);
2422                         ttype = IPFW_TLV_DYN_ENT;
2423                         fptr = dyn_bc;
2424                         farg = dyn_arg;
2425                         break;
2426                 default:
2427                         return (sz);
2428                 }
2429
2430                 while (sz > 0) {
2431                         tlv = (ipfw_obj_tlv *)base;
2432                         if (tlv->type != ttype)
2433                                 break;
2434
2435                         fptr(co, fo, farg, tlv + 1);
2436                         sz -= tlv->length;
2437                         base += tlv->length;
2438                 }
2439         }
2440
2441         return (sz);
2442 }
2443
2444 static void
2445 prepare_format_opts(struct cmdline_opts *co, struct format_opts *fo,
2446     ipfw_obj_tlv *rtlv, int rcnt, caddr_t dynbase, size_t dynsz)
2447 {
2448         int bcwidth, pcwidth, width;
2449         int n;
2450         struct ip_fw_bcounter *cntr;
2451         struct ip_fw_rule *r;
2452
2453         bcwidth = 0;
2454         pcwidth = 0;
2455         if (fo->show_counters != 0) {
2456                 for (n = 0; n < rcnt; n++,
2457                     rtlv = (ipfw_obj_tlv *)((caddr_t)rtlv + rtlv->length)) {
2458                         cntr = (struct ip_fw_bcounter *)(rtlv + 1);
2459                         r = (struct ip_fw_rule *)((caddr_t)cntr + cntr->size);
2460                         /* skip rules from another set */
2461                         if (co->use_set && r->set != co->use_set - 1)
2462                                 continue;
2463
2464                         /* packet counter */
2465                         width = pr_u64(NULL, &cntr->pcnt, 0);
2466                         if (width > pcwidth)
2467                                 pcwidth = width;
2468
2469                         /* byte counter */
2470                         width = pr_u64(NULL, &cntr->bcnt, 0);
2471                         if (width > bcwidth)
2472                                 bcwidth = width;
2473                 }
2474         }
2475         fo->bcwidth = bcwidth;
2476         fo->pcwidth = pcwidth;
2477
2478         fo->dcnt = 0;
2479         if (co->do_dynamic && dynsz > 0)
2480                 foreach_state(co, fo, dynbase, dynsz, prepare_format_dyn, NULL);
2481 }
2482
2483 static int
2484 list_static_range(struct cmdline_opts *co, struct format_opts *fo,
2485     struct buf_pr *bp, ipfw_obj_tlv *rtlv, int rcnt)
2486 {
2487         int n, seen;
2488         struct ip_fw_rule *r;
2489         struct ip_fw_bcounter *cntr;
2490         int c = 0;
2491
2492         for (n = seen = 0; n < rcnt; n++,
2493             rtlv = (ipfw_obj_tlv *)((caddr_t)rtlv + rtlv->length)) {
2494
2495                 if ((fo->show_counters | fo->show_time) != 0) {
2496                         cntr = (struct ip_fw_bcounter *)(rtlv + 1);
2497                         r = (struct ip_fw_rule *)((caddr_t)cntr + cntr->size);
2498                 } else {
2499                         cntr = NULL;
2500                         r = (struct ip_fw_rule *)(rtlv + 1);
2501                 }
2502                 if (r->rulenum > fo->last)
2503                         break;
2504                 if (co->use_set && r->set != co->use_set - 1)
2505                         continue;
2506                 if (r->rulenum >= fo->first && r->rulenum <= fo->last) {
2507                         show_static_rule(co, fo, bp, r, cntr);
2508                         printf("%s", bp->buf);
2509                         c += rtlv->length;
2510                         bp_flush(bp);
2511                         seen++;
2512                 }
2513         }
2514
2515         return (seen);
2516 }
2517
2518 static void
2519 list_dyn_state(struct cmdline_opts *co, struct format_opts *fo,
2520     void *_arg, void *_state)
2521 {
2522         uint16_t rulenum;
2523         uint8_t set;
2524         ipfw_dyn_rule *d;
2525         struct buf_pr *bp;
2526
2527         d = (ipfw_dyn_rule *)_state;
2528         bp = (struct buf_pr *)_arg;
2529
2530         bcopy(&d->rule, &rulenum, sizeof(rulenum));
2531         if (rulenum > fo->last)
2532                 return;
2533         if (co->use_set) {
2534                 bcopy((char *)&d->rule + sizeof(uint16_t),
2535                       &set, sizeof(uint8_t));
2536                 if (set != co->use_set - 1)
2537                         return;
2538         }
2539         if (rulenum >= fo->first) {
2540                 show_dyn_state(co, fo, bp, d);
2541                 printf("%s\n", bp->buf);
2542                 bp_flush(bp);
2543         }
2544 }
2545
2546 static int
2547 list_dyn_range(struct cmdline_opts *co, struct format_opts *fo,
2548     struct buf_pr *bp, caddr_t base, size_t sz)
2549 {
2550
2551         sz = foreach_state(co, fo, base, sz, list_dyn_state, bp);
2552         return (sz);
2553 }
2554
2555 void
2556 ipfw_list(int ac, char *av[], int show_counters)
2557 {
2558         ipfw_cfg_lheader *cfg;
2559         struct format_opts sfo;
2560         size_t sz;
2561         int error;
2562         int lac;
2563         char **lav;
2564         uint32_t rnum;
2565         char *endptr;
2566
2567         if (co.test_only) {
2568                 fprintf(stderr, "Testing only, list disabled\n");
2569                 return;
2570         }
2571         if (co.do_pipe) {
2572                 dummynet_list(ac, av, show_counters);
2573                 return;
2574         }
2575
2576         ac--;
2577         av++;
2578         memset(&sfo, 0, sizeof(sfo));
2579
2580         /* Determine rule range to request */
2581         if (ac > 0) {
2582                 for (lac = ac, lav = av; lac != 0; lac--) {
2583                         rnum = strtoul(*lav++, &endptr, 10);
2584                         if (sfo.first == 0 || rnum < sfo.first)
2585                                 sfo.first = rnum;
2586
2587                         if (*endptr == '-')
2588                                 rnum = strtoul(endptr + 1, &endptr, 10);
2589                         if (sfo.last == 0 || rnum > sfo.last)
2590                                 sfo.last = rnum;
2591                 }
2592         }
2593
2594         /* get configuraion from kernel */
2595         cfg = NULL;
2596         sfo.show_counters = show_counters;
2597         sfo.show_time = co.do_time;
2598         sfo.flags = IPFW_CFG_GET_STATIC;
2599         if (co.do_dynamic != 0)
2600                 sfo.flags |= IPFW_CFG_GET_STATES;
2601         if ((sfo.show_counters | sfo.show_time) != 0)
2602                 sfo.flags |= IPFW_CFG_GET_COUNTERS;
2603         if (ipfw_get_config(&co, &sfo, &cfg, &sz) != 0)
2604                 err(EX_OSERR, "retrieving config failed");
2605
2606         error = ipfw_show_config(&co, &sfo, cfg, sz, ac, av);
2607
2608         free(cfg);
2609
2610         if (error != EX_OK)
2611                 exit(error);
2612 }
2613
2614 static int
2615 ipfw_show_config(struct cmdline_opts *co, struct format_opts *fo,
2616     ipfw_cfg_lheader *cfg, size_t sz, int ac, char *av[])
2617 {
2618         caddr_t dynbase;
2619         size_t dynsz;
2620         int rcnt;
2621         int exitval = EX_OK;
2622         int lac;
2623         char **lav;
2624         char *endptr;
2625         size_t readsz;
2626         struct buf_pr bp;
2627         ipfw_obj_ctlv *ctlv, *tstate;
2628         ipfw_obj_tlv *rbase;
2629
2630         /*
2631          * Handle tablenames TLV first, if any
2632          */
2633         tstate = NULL;
2634         rbase = NULL;
2635         dynbase = NULL;
2636         dynsz = 0;
2637         readsz = sizeof(*cfg);
2638         rcnt = 0;
2639
2640         fo->set_mask = cfg->set_mask;
2641
2642         ctlv = (ipfw_obj_ctlv *)(cfg + 1);
2643
2644         if (cfg->flags & IPFW_CFG_GET_STATIC) {
2645                 /* We've requested static rules */
2646                 if (ctlv->head.type == IPFW_TLV_TBLNAME_LIST) {
2647                         object_sort_ctlv(ctlv);
2648                         fo->tstate = ctlv;
2649                         readsz += ctlv->head.length;
2650                         ctlv = (ipfw_obj_ctlv *)((caddr_t)ctlv +
2651                             ctlv->head.length);
2652                 }
2653
2654                 if (ctlv->head.type == IPFW_TLV_RULE_LIST) {
2655                         rbase = (ipfw_obj_tlv *)(ctlv + 1);
2656                         rcnt = ctlv->count;
2657                         readsz += ctlv->head.length;
2658                         ctlv = (ipfw_obj_ctlv *)((caddr_t)ctlv +
2659                             ctlv->head.length);
2660                 }
2661         }
2662
2663         if ((cfg->flags & IPFW_CFG_GET_STATES) && (readsz != sz))  {
2664                 /* We may have some dynamic states */
2665                 dynsz = sz - readsz;
2666                 /* Skip empty header */
2667                 if (dynsz != sizeof(ipfw_obj_ctlv))
2668                         dynbase = (caddr_t)ctlv;
2669                 else
2670                         dynsz = 0;
2671         }
2672
2673         prepare_format_opts(co, fo, rbase, rcnt, dynbase, dynsz);
2674         bp_alloc(&bp, 4096);
2675
2676         /* if no rule numbers were specified, list all rules */
2677         if (ac == 0) {
2678                 fo->first = 0;
2679                 fo->last = IPFW_DEFAULT_RULE;
2680                 list_static_range(co, fo, &bp, rbase, rcnt);
2681
2682                 if (co->do_dynamic && dynsz > 0) {
2683                         printf("## Dynamic rules (%d %zu):\n", fo->dcnt, dynsz);
2684                         list_dyn_range(co, fo, &bp, dynbase, dynsz);
2685                 }
2686
2687                 bp_free(&bp);
2688                 return (EX_OK);
2689         }
2690
2691         /* display specific rules requested on command line */
2692         for (lac = ac, lav = av; lac != 0; lac--) {
2693                 /* convert command line rule # */
2694                 fo->last = fo->first = strtoul(*lav++, &endptr, 10);
2695                 if (*endptr == '-')
2696                         fo->last = strtoul(endptr + 1, &endptr, 10);
2697                 if (*endptr) {
2698                         exitval = EX_USAGE;
2699                         warnx("invalid rule number: %s", *(lav - 1));
2700                         continue;
2701                 }
2702
2703                 if (list_static_range(co, fo, &bp, rbase, rcnt) == 0) {
2704                         /* give precedence to other error(s) */
2705                         if (exitval == EX_OK)
2706                                 exitval = EX_UNAVAILABLE;
2707                         if (fo->first == fo->last)
2708                                 warnx("rule %u does not exist", fo->first);
2709                         else
2710                                 warnx("no rules in range %u-%u",
2711                                     fo->first, fo->last);
2712                 }
2713         }
2714
2715         if (co->do_dynamic && dynsz > 0) {
2716                 printf("## Dynamic rules:\n");
2717                 for (lac = ac, lav = av; lac != 0; lac--) {
2718                         fo->last = fo->first = strtoul(*lav++, &endptr, 10);
2719                         if (*endptr == '-')
2720                                 fo->last = strtoul(endptr+1, &endptr, 10);
2721                         if (*endptr)
2722                                 /* already warned */
2723                                 continue;
2724                         list_dyn_range(co, fo, &bp, dynbase, dynsz);
2725                 }
2726         }
2727
2728         bp_free(&bp);
2729         return (exitval);
2730 }
2731
2732
2733 /*
2734  * Retrieves current ipfw configuration of given type
2735  * and stores its pointer to @pcfg.
2736  *
2737  * Caller is responsible for freeing @pcfg.
2738  *
2739  * Returns 0 on success.
2740  */
2741
2742 static int
2743 ipfw_get_config(struct cmdline_opts *co, struct format_opts *fo,
2744     ipfw_cfg_lheader **pcfg, size_t *psize)
2745 {
2746         ipfw_cfg_lheader *cfg;
2747         size_t sz;
2748         int i;
2749
2750
2751         if (co->test_only != 0) {
2752                 fprintf(stderr, "Testing only, list disabled\n");
2753                 return (0);
2754         }
2755
2756         /* Start with some data size */
2757         sz = 4096;
2758         cfg = NULL;
2759
2760         for (i = 0; i < 16; i++) {
2761                 if (cfg != NULL)
2762                         free(cfg);
2763                 if ((cfg = calloc(1, sz)) == NULL)
2764                         return (ENOMEM);
2765
2766                 cfg->flags = fo->flags;
2767                 cfg->start_rule = fo->first;
2768                 cfg->end_rule = fo->last;
2769
2770                 if (do_get3(IP_FW_XGET, &cfg->opheader, &sz) != 0) {
2771                         if (errno != ENOMEM) {
2772                                 free(cfg);
2773                                 return (errno);
2774                         }
2775
2776                         /* Buffer size is not enough. Try to increase */
2777                         sz = sz * 2;
2778                         if (sz < cfg->size)
2779                                 sz = cfg->size;
2780                         continue;
2781                 }
2782
2783                 *pcfg = cfg;
2784                 *psize = sz;
2785                 return (0);
2786         }
2787
2788         free(cfg);
2789         return (ENOMEM);
2790 }
2791
2792 static int
2793 lookup_host (char *host, struct in_addr *ipaddr)
2794 {
2795         struct hostent *he;
2796
2797         if (!inet_aton(host, ipaddr)) {
2798                 if ((he = gethostbyname(host)) == NULL)
2799                         return(-1);
2800                 *ipaddr = *(struct in_addr *)he->h_addr_list[0];
2801         }
2802         return(0);
2803 }
2804
2805 struct tidx {
2806         ipfw_obj_ntlv *idx;
2807         uint32_t count;
2808         uint32_t size;
2809         uint16_t counter;
2810         uint8_t set;
2811 };
2812
2813 int
2814 ipfw_check_object_name(const char *name)
2815 {
2816         int c, i, l;
2817
2818         /*
2819          * Check that name is null-terminated and contains
2820          * valid symbols only. Valid mask is:
2821          * [a-zA-Z0-9\-_\.]{1,63}
2822          */
2823         l = strlen(name);
2824         if (l == 0 || l >= 64)
2825                 return (EINVAL);
2826         for (i = 0; i < l; i++) {
2827                 c = name[i];
2828                 if (isalpha(c) || isdigit(c) || c == '_' ||
2829                     c == '-' || c == '.')
2830                         continue;
2831                 return (EINVAL);
2832         }
2833         return (0);
2834 }
2835
2836 static char *default_state_name = "default";
2837 static int
2838 state_check_name(const char *name)
2839 {
2840
2841         if (ipfw_check_object_name(name) != 0)
2842                 return (EINVAL);
2843         if (strcmp(name, "any") == 0)
2844                 return (EINVAL);
2845         return (0);
2846 }
2847
2848 static int
2849 eaction_check_name(const char *name)
2850 {
2851
2852         if (ipfw_check_object_name(name) != 0)
2853                 return (EINVAL);
2854         /* Restrict some 'special' names */
2855         if (match_token(rule_actions, name) != -1 &&
2856             match_token(rule_action_params, name) != -1)
2857                 return (EINVAL);
2858         return (0);
2859 }
2860
2861 static uint16_t
2862 pack_object(struct tidx *tstate, char *name, int otype)
2863 {
2864         int i;
2865         ipfw_obj_ntlv *ntlv;
2866
2867         for (i = 0; i < tstate->count; i++) {
2868                 if (strcmp(tstate->idx[i].name, name) != 0)
2869                         continue;
2870                 if (tstate->idx[i].set != tstate->set)
2871                         continue;
2872                 if (tstate->idx[i].head.type != otype)
2873                         continue;
2874
2875                 return (tstate->idx[i].idx);
2876         }
2877
2878         if (tstate->count + 1 > tstate->size) {
2879                 tstate->size += 4;
2880                 tstate->idx = realloc(tstate->idx, tstate->size *
2881                     sizeof(ipfw_obj_ntlv));
2882                 if (tstate->idx == NULL)
2883                         return (0);
2884         }
2885
2886         ntlv = &tstate->idx[i];
2887         memset(ntlv, 0, sizeof(ipfw_obj_ntlv));
2888         strlcpy(ntlv->name, name, sizeof(ntlv->name));
2889         ntlv->head.type = otype;
2890         ntlv->head.length = sizeof(ipfw_obj_ntlv);
2891         ntlv->set = tstate->set;
2892         ntlv->idx = ++tstate->counter;
2893         tstate->count++;
2894
2895         return (ntlv->idx);
2896 }
2897
2898 static uint16_t
2899 pack_table(struct tidx *tstate, char *name)
2900 {
2901
2902         if (table_check_name(name) != 0)
2903                 return (0);
2904
2905         return (pack_object(tstate, name, IPFW_TLV_TBL_NAME));
2906 }
2907
2908 static void
2909 fill_table(ipfw_insn *cmd, char *av, uint8_t opcode, struct tidx *tstate)
2910 {
2911         uint32_t *d = ((ipfw_insn_u32 *)cmd)->d;
2912         uint16_t uidx;
2913         char *p;
2914
2915         if ((p = strchr(av + 6, ')')) == NULL)
2916                 errx(EX_DATAERR, "forgotten parenthesis: '%s'", av);
2917         *p = '\0';
2918         p = strchr(av + 6, ',');
2919         if (p)
2920                 *p++ = '\0';
2921
2922         if ((uidx = pack_table(tstate, av + 6)) == 0)
2923                 errx(EX_DATAERR, "Invalid table name: %s", av + 6);
2924
2925         cmd->opcode = opcode;
2926         cmd->arg1 = uidx;
2927         if (p) {
2928                 cmd->len |= F_INSN_SIZE(ipfw_insn_u32);
2929                 d[0] = strtoul(p, NULL, 0);
2930         } else
2931                 cmd->len |= F_INSN_SIZE(ipfw_insn);
2932 }
2933
2934
2935 /*
2936  * fills the addr and mask fields in the instruction as appropriate from av.
2937  * Update length as appropriate.
2938  * The following formats are allowed:
2939  *      me      returns O_IP_*_ME
2940  *      1.2.3.4         single IP address
2941  *      1.2.3.4:5.6.7.8 address:mask
2942  *      1.2.3.4/24      address/mask
2943  *      1.2.3.4/26{1,6,5,4,23}  set of addresses in a subnet
2944  * We can have multiple comma-separated address/mask entries.
2945  */
2946 static void
2947 fill_ip(ipfw_insn_ip *cmd, char *av, int cblen, struct tidx *tstate)
2948 {
2949         int len = 0;
2950         uint32_t *d = ((ipfw_insn_u32 *)cmd)->d;
2951
2952         cmd->o.len &= ~F_LEN_MASK;      /* zero len */
2953
2954         if (_substrcmp(av, "any") == 0)
2955                 return;
2956
2957         if (_substrcmp(av, "me") == 0) {
2958                 cmd->o.len |= F_INSN_SIZE(ipfw_insn);
2959                 return;
2960         }
2961
2962         if (strncmp(av, "table(", 6) == 0) {
2963                 fill_table(&cmd->o, av, O_IP_DST_LOOKUP, tstate);
2964                 return;
2965         }
2966
2967     while (av) {
2968         /*
2969          * After the address we can have '/' or ':' indicating a mask,
2970          * ',' indicating another address follows, '{' indicating a
2971          * set of addresses of unspecified size.
2972          */
2973         char *t = NULL, *p = strpbrk(av, "/:,{");
2974         int masklen;
2975         char md, nd = '\0';
2976
2977         CHECK_LENGTH(cblen, F_INSN_SIZE(ipfw_insn) + 2 + len);
2978
2979         if (p) {
2980                 md = *p;
2981                 *p++ = '\0';
2982                 if ((t = strpbrk(p, ",{")) != NULL) {
2983                         nd = *t;
2984                         *t = '\0';
2985                 }
2986         } else
2987                 md = '\0';
2988
2989         if (lookup_host(av, (struct in_addr *)&d[0]) != 0)
2990                 errx(EX_NOHOST, "hostname ``%s'' unknown", av);
2991         switch (md) {
2992         case ':':
2993                 if (!inet_aton(p, (struct in_addr *)&d[1]))
2994                         errx(EX_DATAERR, "bad netmask ``%s''", p);
2995                 break;
2996         case '/':
2997                 masklen = atoi(p);
2998                 if (masklen == 0)
2999                         d[1] = htonl(0U);       /* mask */
3000                 else if (masklen > 32)
3001                         errx(EX_DATAERR, "bad width ``%s''", p);
3002                 else
3003                         d[1] = htonl(~0U << (32 - masklen));
3004                 break;
3005         case '{':       /* no mask, assume /24 and put back the '{' */
3006                 d[1] = htonl(~0U << (32 - 24));
3007                 *(--p) = md;
3008                 break;
3009
3010         case ',':       /* single address plus continuation */
3011                 *(--p) = md;
3012                 /* FALLTHROUGH */
3013         case 0:         /* initialization value */
3014         default:
3015                 d[1] = htonl(~0U);      /* force /32 */
3016                 break;
3017         }
3018         d[0] &= d[1];           /* mask base address with mask */
3019         if (t)
3020                 *t = nd;
3021         /* find next separator */
3022         if (p)
3023                 p = strpbrk(p, ",{");
3024         if (p && *p == '{') {
3025                 /*
3026                  * We have a set of addresses. They are stored as follows:
3027                  *   arg1       is the set size (powers of 2, 2..256)
3028                  *   addr       is the base address IN HOST FORMAT
3029                  *   mask..     is an array of arg1 bits (rounded up to
3030                  *              the next multiple of 32) with bits set
3031                  *              for each host in the map.
3032                  */
3033                 uint32_t *map = (uint32_t *)&cmd->mask;
3034                 int low, high;
3035                 int i = contigmask((uint8_t *)&(d[1]), 32);
3036
3037                 if (len > 0)
3038                         errx(EX_DATAERR, "address set cannot be in a list");
3039                 if (i < 24 || i > 31)
3040                         errx(EX_DATAERR, "invalid set with mask %d\n", i);
3041                 cmd->o.arg1 = 1<<(32-i);        /* map length           */
3042                 d[0] = ntohl(d[0]);             /* base addr in host format */
3043                 cmd->o.opcode = O_IP_DST_SET;   /* default */
3044                 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32) + (cmd->o.arg1+31)/32;
3045                 for (i = 0; i < (cmd->o.arg1+31)/32 ; i++)
3046                         map[i] = 0;     /* clear map */
3047
3048                 av = p + 1;
3049                 low = d[0] & 0xff;
3050                 high = low + cmd->o.arg1 - 1;
3051                 /*
3052                  * Here, i stores the previous value when we specify a range
3053                  * of addresses within a mask, e.g. 45-63. i = -1 means we
3054                  * have no previous value.
3055                  */
3056                 i = -1; /* previous value in a range */
3057                 while (isdigit(*av)) {
3058                         char *s;
3059                         int a = strtol(av, &s, 0);
3060
3061                         if (s == av) { /* no parameter */
3062                             if (*av != '}')
3063                                 errx(EX_DATAERR, "set not closed\n");
3064                             if (i != -1)
3065                                 errx(EX_DATAERR, "incomplete range %d-", i);
3066                             break;
3067                         }
3068                         if (a < low || a > high)
3069                             errx(EX_DATAERR, "addr %d out of range [%d-%d]\n",
3070                                 a, low, high);
3071                         a -= low;
3072                         if (i == -1)    /* no previous in range */
3073                             i = a;
3074                         else {          /* check that range is valid */
3075                             if (i > a)
3076                                 errx(EX_DATAERR, "invalid range %d-%d",
3077                                         i+low, a+low);
3078                             if (*s == '-')
3079                                 errx(EX_DATAERR, "double '-' in range");
3080                         }
3081                         for (; i <= a; i++)
3082                             map[i/32] |= 1<<(i & 31);
3083                         i = -1;
3084                         if (*s == '-')
3085                             i = a;
3086                         else if (*s == '}')
3087                             break;
3088                         av = s+1;
3089                 }
3090                 return;
3091         }
3092         av = p;
3093         if (av)                 /* then *av must be a ',' */
3094                 av++;
3095
3096         /* Check this entry */
3097         if (d[1] == 0) { /* "any", specified as x.x.x.x/0 */
3098                 /*
3099                  * 'any' turns the entire list into a NOP.
3100                  * 'not any' never matches, so it is removed from the
3101                  * list unless it is the only item, in which case we
3102                  * report an error.
3103                  */
3104                 if (cmd->o.len & F_NOT) {       /* "not any" never matches */
3105                         if (av == NULL && len == 0) /* only this entry */
3106                                 errx(EX_DATAERR, "not any never matches");
3107                 }
3108                 /* else do nothing and skip this entry */
3109                 return;
3110         }
3111         /* A single IP can be stored in an optimized format */
3112         if (d[1] == (uint32_t)~0 && av == NULL && len == 0) {
3113                 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32);
3114                 return;
3115         }
3116         len += 2;       /* two words... */
3117         d += 2;
3118     } /* end while */
3119     if (len + 1 > F_LEN_MASK)
3120         errx(EX_DATAERR, "address list too long");
3121     cmd->o.len |= len+1;
3122 }
3123
3124
3125 /* n2mask sets n bits of the mask */
3126 void
3127 n2mask(struct in6_addr *mask, int n)
3128 {
3129         static int      minimask[9] =
3130             { 0x00, 0x80, 0xc0, 0xe0, 0xf0, 0xf8, 0xfc, 0xfe, 0xff };
3131         u_char          *p;
3132
3133         memset(mask, 0, sizeof(struct in6_addr));
3134         p = (u_char *) mask;
3135         for (; n > 0; p++, n -= 8) {
3136                 if (n >= 8)
3137                         *p = 0xff;
3138                 else
3139                         *p = minimask[n];
3140         }
3141         return;
3142 }
3143
3144 static void
3145 fill_flags_cmd(ipfw_insn *cmd, enum ipfw_opcodes opcode,
3146         struct _s_x *flags, char *p)
3147 {
3148         char *e;
3149         uint32_t set = 0, clear = 0;
3150
3151         if (fill_flags(flags, p, &e, &set, &clear) != 0)
3152                 errx(EX_DATAERR, "invalid flag %s", e);
3153
3154         cmd->opcode = opcode;
3155         cmd->len =  (cmd->len & (F_NOT | F_OR)) | 1;
3156         cmd->arg1 = (set & 0xff) | ( (clear & 0xff) << 8);
3157 }
3158
3159
3160 void
3161 ipfw_delete(char *av[])
3162 {
3163         int i, j;
3164         int exitval = EX_OK;
3165         int do_set = 0;
3166         char *sep;
3167         ipfw_range_tlv rt;
3168
3169         av++;
3170         NEED1("missing rule specification");
3171         memset(&rt, 0, sizeof(rt));
3172         if ( *av && _substrcmp(*av, "set") == 0) {
3173                 /* Do not allow using the following syntax:
3174                  *      ipfw set N delete set M
3175                  */
3176                 if (co.use_set)
3177                         errx(EX_DATAERR, "invalid syntax");
3178                 do_set = 1;     /* delete set */
3179                 av++;
3180         }
3181
3182         /* Rule number */
3183         while (*av && isdigit(**av)) {
3184                 i = strtol(*av, &sep, 10);
3185                 j = i;
3186                 if (*sep== '-')
3187                         j = strtol(sep + 1, NULL, 10);
3188                 av++;
3189                 if (co.do_nat) {
3190                         exitval = do_cmd(IP_FW_NAT_DEL, &i, sizeof i);
3191                         if (exitval) {
3192                                 exitval = EX_UNAVAILABLE;
3193                                 warn("rule %u not available", i);
3194                         }
3195                 } else if (co.do_pipe) {
3196                         exitval = ipfw_delete_pipe(co.do_pipe, i);
3197                 } else {
3198                         if (do_set != 0) {
3199                                 rt.set = i & 31;
3200                                 rt.flags = IPFW_RCFLAG_SET;
3201                         } else {
3202                                 rt.start_rule = i & 0xffff;
3203                                 rt.end_rule = j & 0xffff;
3204                                 if (rt.start_rule == 0 && rt.end_rule == 0)
3205                                         rt.flags |= IPFW_RCFLAG_ALL;
3206                                 else
3207                                         rt.flags |= IPFW_RCFLAG_RANGE;
3208                                 if (co.use_set != 0) {
3209                                         rt.set = co.use_set - 1;
3210                                         rt.flags |= IPFW_RCFLAG_SET;
3211                                 }
3212                         }
3213                         i = do_range_cmd(IP_FW_XDEL, &rt);
3214                         if (i != 0) {
3215                                 exitval = EX_UNAVAILABLE;
3216                                 warn("rule %u: setsockopt(IP_FW_XDEL)",
3217                                     rt.start_rule);
3218                         } else if (rt.new_set == 0) {
3219                                 exitval = EX_UNAVAILABLE;
3220                                 if (rt.start_rule != rt.end_rule)
3221                                         warnx("no rules rules in %u-%u range",
3222                                             rt.start_rule, rt.end_rule);
3223                                 else
3224                                         warnx("rule %u not found",
3225                                             rt.start_rule);
3226                         }
3227                 }
3228         }
3229         if (exitval != EX_OK)
3230                 exit(exitval);
3231 }
3232
3233
3234 /*
3235  * fill the interface structure. We do not check the name as we can
3236  * create interfaces dynamically, so checking them at insert time
3237  * makes relatively little sense.
3238  * Interface names containing '*', '?', or '[' are assumed to be shell
3239  * patterns which match interfaces.
3240  */
3241 static void
3242 fill_iface(ipfw_insn_if *cmd, char *arg, int cblen, struct tidx *tstate)
3243 {
3244         char *p;
3245         uint16_t uidx;
3246
3247         cmd->name[0] = '\0';
3248         cmd->o.len |= F_INSN_SIZE(ipfw_insn_if);
3249
3250         CHECK_CMDLEN;
3251
3252         /* Parse the interface or address */
3253         if (strcmp(arg, "any") == 0)
3254                 cmd->o.len = 0;         /* effectively ignore this command */
3255         else if (strncmp(arg, "table(", 6) == 0) {
3256                 if ((p = strchr(arg + 6, ')')) == NULL)
3257                         errx(EX_DATAERR, "forgotten parenthesis: '%s'", arg);
3258                 *p = '\0';
3259                 p = strchr(arg + 6, ',');
3260                 if (p)
3261                         *p++ = '\0';
3262                 if ((uidx = pack_table(tstate, arg + 6)) == 0)
3263                         errx(EX_DATAERR, "Invalid table name: %s", arg + 6);
3264
3265                 cmd->name[0] = '\1'; /* Special value indicating table */
3266                 cmd->p.kidx = uidx;
3267         } else if (!isdigit(*arg)) {
3268                 strlcpy(cmd->name, arg, sizeof(cmd->name));
3269                 cmd->p.glob = strpbrk(arg, "*?[") != NULL ? 1 : 0;
3270         } else if (!inet_aton(arg, &cmd->p.ip))
3271                 errx(EX_DATAERR, "bad ip address ``%s''", arg);
3272 }
3273
3274 static void
3275 get_mac_addr_mask(const char *p, uint8_t *addr, uint8_t *mask)
3276 {
3277         int i;
3278         size_t l;
3279         char *ap, *ptr, *optr;
3280         struct ether_addr *mac;
3281         const char *macset = "0123456789abcdefABCDEF:";
3282
3283         if (strcmp(p, "any") == 0) {
3284                 for (i = 0; i < ETHER_ADDR_LEN; i++)
3285                         addr[i] = mask[i] = 0;
3286                 return;
3287         }
3288
3289         optr = ptr = strdup(p);
3290         if ((ap = strsep(&ptr, "&/")) != NULL && *ap != 0) {
3291                 l = strlen(ap);
3292                 if (strspn(ap, macset) != l || (mac = ether_aton(ap)) == NULL)
3293                         errx(EX_DATAERR, "Incorrect MAC address");
3294                 bcopy(mac, addr, ETHER_ADDR_LEN);
3295         } else
3296                 errx(EX_DATAERR, "Incorrect MAC address");
3297
3298         if (ptr != NULL) { /* we have mask? */
3299                 if (p[ptr - optr - 1] == '/') { /* mask len */
3300                         long ml = strtol(ptr, &ap, 10);
3301                         if (*ap != 0 || ml > ETHER_ADDR_LEN * 8 || ml < 0)
3302                                 errx(EX_DATAERR, "Incorrect mask length");
3303                         for (i = 0; ml > 0 && i < ETHER_ADDR_LEN; ml -= 8, i++)
3304                                 mask[i] = (ml >= 8) ? 0xff: (~0) << (8 - ml);
3305                 } else { /* mask */
3306                         l = strlen(ptr);
3307                         if (strspn(ptr, macset) != l ||
3308                             (mac = ether_aton(ptr)) == NULL)
3309                                 errx(EX_DATAERR, "Incorrect mask");
3310                         bcopy(mac, mask, ETHER_ADDR_LEN);
3311                 }
3312         } else { /* default mask: ff:ff:ff:ff:ff:ff */
3313                 for (i = 0; i < ETHER_ADDR_LEN; i++)
3314                         mask[i] = 0xff;
3315         }
3316         for (i = 0; i < ETHER_ADDR_LEN; i++)
3317                 addr[i] &= mask[i];
3318
3319         free(optr);
3320 }
3321
3322 /*
3323  * helper function, updates the pointer to cmd with the length
3324  * of the current command, and also cleans up the first word of
3325  * the new command in case it has been clobbered before.
3326  */
3327 static ipfw_insn *
3328 next_cmd(ipfw_insn *cmd, int *len)
3329 {
3330         *len -= F_LEN(cmd);
3331         CHECK_LENGTH(*len, 0);
3332         cmd += F_LEN(cmd);
3333         bzero(cmd, sizeof(*cmd));
3334         return cmd;
3335 }
3336
3337 /*
3338  * Takes arguments and copies them into a comment
3339  */
3340 static void
3341 fill_comment(ipfw_insn *cmd, char **av, int cblen)
3342 {
3343         int i, l;
3344         char *p = (char *)(cmd + 1);
3345
3346         cmd->opcode = O_NOP;
3347         cmd->len =  (cmd->len & (F_NOT | F_OR));
3348
3349         /* Compute length of comment string. */
3350         for (i = 0, l = 0; av[i] != NULL; i++)
3351                 l += strlen(av[i]) + 1;
3352         if (l == 0)
3353                 return;
3354         if (l > 84)
3355                 errx(EX_DATAERR,
3356                     "comment too long (max 80 chars)");
3357         l = 1 + (l+3)/4;
3358         cmd->len =  (cmd->len & (F_NOT | F_OR)) | l;
3359         CHECK_CMDLEN;
3360
3361         for (i = 0; av[i] != NULL; i++) {
3362                 strcpy(p, av[i]);
3363                 p += strlen(av[i]);
3364                 *p++ = ' ';
3365         }
3366         *(--p) = '\0';
3367 }
3368
3369 /*
3370  * A function to fill simple commands of size 1.
3371  * Existing flags are preserved.
3372  */
3373 static void
3374 fill_cmd(ipfw_insn *cmd, enum ipfw_opcodes opcode, int flags, uint16_t arg)
3375 {
3376         cmd->opcode = opcode;
3377         cmd->len =  ((cmd->len | flags) & (F_NOT | F_OR)) | 1;
3378         cmd->arg1 = arg;
3379 }
3380
3381 /*
3382  * Fetch and add the MAC address and type, with masks. This generates one or
3383  * two microinstructions, and returns the pointer to the last one.
3384  */
3385 static ipfw_insn *
3386 add_mac(ipfw_insn *cmd, char *av[], int cblen)
3387 {
3388         ipfw_insn_mac *mac;
3389
3390         if ( ( av[0] == NULL ) || ( av[1] == NULL ) )
3391                 errx(EX_DATAERR, "MAC dst src");
3392
3393         cmd->opcode = O_MACADDR2;
3394         cmd->len = (cmd->len & (F_NOT | F_OR)) | F_INSN_SIZE(ipfw_insn_mac);
3395         CHECK_CMDLEN;
3396
3397         mac = (ipfw_insn_mac *)cmd;
3398         get_mac_addr_mask(av[0], mac->addr, mac->mask); /* dst */
3399         get_mac_addr_mask(av[1], &(mac->addr[ETHER_ADDR_LEN]),
3400             &(mac->mask[ETHER_ADDR_LEN])); /* src */
3401         return cmd;
3402 }
3403
3404 static ipfw_insn *
3405 add_mactype(ipfw_insn *cmd, char *av, int cblen)
3406 {
3407         if (!av)
3408                 errx(EX_DATAERR, "missing MAC type");
3409         if (strcmp(av, "any") != 0) { /* we have a non-null type */
3410                 fill_newports((ipfw_insn_u16 *)cmd, av, IPPROTO_ETHERTYPE,
3411                     cblen);
3412                 cmd->opcode = O_MAC_TYPE;
3413                 return cmd;
3414         } else
3415                 return NULL;
3416 }
3417
3418 static ipfw_insn *
3419 add_proto0(ipfw_insn *cmd, char *av, u_char *protop)
3420 {
3421         struct protoent *pe;
3422         char *ep;
3423         int proto;
3424
3425         proto = strtol(av, &ep, 10);
3426         if (*ep != '\0' || proto <= 0) {
3427                 if ((pe = getprotobyname(av)) == NULL)
3428                         return NULL;
3429                 proto = pe->p_proto;
3430         }
3431
3432         fill_cmd(cmd, O_PROTO, 0, proto);
3433         *protop = proto;
3434         return cmd;
3435 }
3436
3437 static ipfw_insn *
3438 add_proto(ipfw_insn *cmd, char *av, u_char *protop)
3439 {
3440         u_char proto = IPPROTO_IP;
3441
3442         if (_substrcmp(av, "all") == 0 || strcmp(av, "ip") == 0)
3443                 ; /* do not set O_IP4 nor O_IP6 */
3444         else if (strcmp(av, "ip4") == 0)
3445                 /* explicit "just IPv4" rule */
3446                 fill_cmd(cmd, O_IP4, 0, 0);
3447         else if (strcmp(av, "ip6") == 0) {
3448                 /* explicit "just IPv6" rule */
3449                 proto = IPPROTO_IPV6;
3450                 fill_cmd(cmd, O_IP6, 0, 0);
3451         } else
3452                 return add_proto0(cmd, av, protop);
3453
3454         *protop = proto;
3455         return cmd;
3456 }
3457
3458 static ipfw_insn *
3459 add_proto_compat(ipfw_insn *cmd, char *av, u_char *protop)
3460 {
3461         u_char proto = IPPROTO_IP;
3462
3463         if (_substrcmp(av, "all") == 0 || strcmp(av, "ip") == 0)
3464                 ; /* do not set O_IP4 nor O_IP6 */
3465         else if (strcmp(av, "ipv4") == 0 || strcmp(av, "ip4") == 0)
3466                 /* explicit "just IPv4" rule */
3467                 fill_cmd(cmd, O_IP4, 0, 0);
3468         else if (strcmp(av, "ipv6") == 0 || strcmp(av, "ip6") == 0) {
3469                 /* explicit "just IPv6" rule */
3470                 proto = IPPROTO_IPV6;
3471                 fill_cmd(cmd, O_IP6, 0, 0);
3472         } else
3473                 return add_proto0(cmd, av, protop);
3474
3475         *protop = proto;
3476         return cmd;
3477 }
3478
3479 static ipfw_insn *
3480 add_srcip(ipfw_insn *cmd, char *av, int cblen, struct tidx *tstate)
3481 {
3482         fill_ip((ipfw_insn_ip *)cmd, av, cblen, tstate);
3483         if (cmd->opcode == O_IP_DST_SET)                        /* set */
3484                 cmd->opcode = O_IP_SRC_SET;
3485         else if (cmd->opcode == O_IP_DST_LOOKUP)                /* table */
3486                 cmd->opcode = O_IP_SRC_LOOKUP;
3487         else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn))          /* me */
3488                 cmd->opcode = O_IP_SRC_ME;
3489         else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_u32))      /* one IP */
3490                 cmd->opcode = O_IP_SRC;
3491         else                                                    /* addr/mask */
3492                 cmd->opcode = O_IP_SRC_MASK;
3493         return cmd;
3494 }
3495
3496 static ipfw_insn *
3497 add_dstip(ipfw_insn *cmd, char *av, int cblen, struct tidx *tstate)
3498 {
3499         fill_ip((ipfw_insn_ip *)cmd, av, cblen, tstate);
3500         if (cmd->opcode == O_IP_DST_SET)                        /* set */
3501                 ;
3502         else if (cmd->opcode == O_IP_DST_LOOKUP)                /* table */
3503                 ;
3504         else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn))          /* me */
3505                 cmd->opcode = O_IP_DST_ME;
3506         else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_u32))      /* one IP */
3507                 cmd->opcode = O_IP_DST;
3508         else                                                    /* addr/mask */
3509                 cmd->opcode = O_IP_DST_MASK;
3510         return cmd;
3511 }
3512
3513 static struct _s_x f_reserved_keywords[] = {
3514         { "altq",       TOK_OR },
3515         { "//",         TOK_OR },
3516         { "diverted",   TOK_OR },
3517         { "dst-port",   TOK_OR },
3518         { "src-port",   TOK_OR },
3519         { "established",        TOK_OR },
3520         { "keep-state", TOK_OR },
3521         { "frag",       TOK_OR },
3522         { "icmptypes",  TOK_OR },
3523         { "in",         TOK_OR },
3524         { "out",        TOK_OR },
3525         { "ip6",        TOK_OR },
3526         { "any",        TOK_OR },
3527         { "to",         TOK_OR },
3528         { "via",        TOK_OR },
3529         { "{",          TOK_OR },
3530         { NULL, 0 }     /* terminator */
3531 };
3532
3533 static ipfw_insn *
3534 add_ports(ipfw_insn *cmd, char *av, u_char proto, int opcode, int cblen)
3535 {
3536
3537         if (match_token(f_reserved_keywords, av) != -1)
3538                 return (NULL);
3539
3540         if (fill_newports((ipfw_insn_u16 *)cmd, av, proto, cblen)) {
3541                 /* XXX todo: check that we have a protocol with ports */
3542                 cmd->opcode = opcode;
3543                 return cmd;
3544         }
3545         return NULL;
3546 }
3547
3548 static ipfw_insn *
3549 add_src(ipfw_insn *cmd, char *av, u_char proto, int cblen, struct tidx *tstate)
3550 {
3551         struct in6_addr a;
3552         char *host, *ch, buf[INET6_ADDRSTRLEN];
3553         ipfw_insn *ret = NULL;
3554         int len;
3555
3556         /* Copy first address in set if needed */
3557         if ((ch = strpbrk(av, "/,")) != NULL) {
3558                 len = ch - av;
3559                 strlcpy(buf, av, sizeof(buf));
3560                 if (len < sizeof(buf))
3561                         buf[len] = '\0';
3562                 host = buf;
3563         } else
3564                 host = av;
3565
3566         if (proto == IPPROTO_IPV6  || strcmp(av, "me6") == 0 ||
3567             inet_pton(AF_INET6, host, &a) == 1)
3568                 ret = add_srcip6(cmd, av, cblen);
3569         /* XXX: should check for IPv4, not !IPv6 */
3570         if (ret == NULL && (proto == IPPROTO_IP || strcmp(av, "me") == 0 ||
3571             inet_pton(AF_INET6, host, &a) != 1))
3572                 ret = add_srcip(cmd, av, cblen, tstate);
3573         if (ret == NULL && strcmp(av, "any") != 0)
3574                 ret = cmd;
3575
3576         return ret;
3577 }
3578
3579 static ipfw_insn *
3580 add_dst(ipfw_insn *cmd, char *av, u_char proto, int cblen, struct tidx *tstate)
3581 {
3582         struct in6_addr a;
3583         char *host, *ch, buf[INET6_ADDRSTRLEN];
3584         ipfw_insn *ret = NULL;
3585         int len;
3586
3587         /* Copy first address in set if needed */
3588         if ((ch = strpbrk(av, "/,")) != NULL) {
3589                 len = ch - av;
3590                 strlcpy(buf, av, sizeof(buf));
3591                 if (len < sizeof(buf))
3592                         buf[len] = '\0';
3593                 host = buf;
3594         } else
3595                 host = av;
3596
3597         if (proto == IPPROTO_IPV6  || strcmp(av, "me6") == 0 ||
3598             inet_pton(AF_INET6, host, &a) == 1)
3599                 ret = add_dstip6(cmd, av, cblen);
3600         /* XXX: should check for IPv4, not !IPv6 */
3601         if (ret == NULL && (proto == IPPROTO_IP || strcmp(av, "me") == 0 ||
3602             inet_pton(AF_INET6, host, &a) != 1))
3603                 ret = add_dstip(cmd, av, cblen, tstate);
3604         if (ret == NULL && strcmp(av, "any") != 0)
3605                 ret = cmd;
3606
3607         return ret;
3608 }
3609
3610 /*
3611  * Parse arguments and assemble the microinstructions which make up a rule.
3612  * Rules are added into the 'rulebuf' and then copied in the correct order
3613  * into the actual rule.
3614  *
3615  * The syntax for a rule starts with the action, followed by
3616  * optional action parameters, and the various match patterns.
3617  * In the assembled microcode, the first opcode must be an O_PROBE_STATE
3618  * (generated if the rule includes a keep-state option), then the
3619  * various match patterns, log/altq actions, and the actual action.
3620  *
3621  */
3622 void
3623 compile_rule(char *av[], uint32_t *rbuf, int *rbufsize, struct tidx *tstate)
3624 {
3625         /*
3626          * rules are added into the 'rulebuf' and then copied in
3627          * the correct order into the actual rule.
3628          * Some things that need to go out of order (prob, action etc.)
3629          * go into actbuf[].
3630          */
3631         static uint32_t actbuf[255], cmdbuf[255];
3632         int rblen, ablen, cblen;
3633
3634         ipfw_insn *src, *dst, *cmd, *action, *prev=NULL;
3635         ipfw_insn *first_cmd;   /* first match pattern */
3636
3637         struct ip_fw_rule *rule;
3638
3639         /*
3640          * various flags used to record that we entered some fields.
3641          */
3642         ipfw_insn *have_state = NULL;   /* check-state or keep-state */
3643         ipfw_insn *have_log = NULL, *have_altq = NULL, *have_tag = NULL;
3644         size_t len;
3645
3646         int i;
3647
3648         int open_par = 0;       /* open parenthesis ( */
3649
3650         /* proto is here because it is used to fetch ports */
3651         u_char proto = IPPROTO_IP;      /* default protocol */
3652
3653         double match_prob = 1; /* match probability, default is always match */
3654
3655         bzero(actbuf, sizeof(actbuf));          /* actions go here */
3656         bzero(cmdbuf, sizeof(cmdbuf));
3657         bzero(rbuf, *rbufsize);
3658
3659         rule = (struct ip_fw_rule *)rbuf;
3660         cmd = (ipfw_insn *)cmdbuf;
3661         action = (ipfw_insn *)actbuf;
3662
3663         rblen = *rbufsize / sizeof(uint32_t);
3664         rblen -= sizeof(struct ip_fw_rule) / sizeof(uint32_t);
3665         ablen = sizeof(actbuf) / sizeof(actbuf[0]);
3666         cblen = sizeof(cmdbuf) / sizeof(cmdbuf[0]);
3667         cblen -= F_INSN_SIZE(ipfw_insn_u32) + 1;
3668
3669 #define CHECK_RBUFLEN(len)      { CHECK_LENGTH(rblen, len); rblen -= len; }
3670 #define CHECK_ACTLEN            CHECK_LENGTH(ablen, action->len)
3671
3672         av++;
3673
3674         /* [rule N]     -- Rule number optional */
3675         if (av[0] && isdigit(**av)) {
3676                 rule->rulenum = atoi(*av);
3677                 av++;
3678         }
3679
3680         /* [set N]      -- set number (0..RESVD_SET), optional */
3681         if (av[0] && av[1] && _substrcmp(*av, "set") == 0) {
3682                 int set = strtoul(av[1], NULL, 10);
3683                 if (set < 0 || set > RESVD_SET)
3684                         errx(EX_DATAERR, "illegal set %s", av[1]);
3685                 rule->set = set;
3686                 tstate->set = set;
3687                 av += 2;
3688         }
3689
3690         /* [prob D]     -- match probability, optional */
3691         if (av[0] && av[1] && _substrcmp(*av, "prob") == 0) {
3692                 match_prob = strtod(av[1], NULL);
3693
3694                 if (match_prob <= 0 || match_prob > 1)
3695                         errx(EX_DATAERR, "illegal match prob. %s", av[1]);
3696                 av += 2;
3697         }
3698
3699         /* action       -- mandatory */
3700         NEED1("missing action");
3701         i = match_token(rule_actions, *av);
3702         av++;
3703         action->len = 1;        /* default */
3704         CHECK_ACTLEN;
3705         switch(i) {
3706         case TOK_CHECKSTATE:
3707                 have_state = action;
3708                 action->opcode = O_CHECK_STATE;
3709                 if (*av == NULL) {
3710                         action->arg1 = pack_object(tstate,
3711                             default_state_name, IPFW_TLV_STATE_NAME);
3712                         break;
3713                 }
3714                 if (strcmp(*av, "any") == 0)
3715                         action->arg1 = 0;
3716                 else if (match_token(rule_options, *av) != -1) {
3717                         action->arg1 = pack_object(tstate,
3718                             default_state_name, IPFW_TLV_STATE_NAME);
3719                         warn("Ambiguous state name '%s', '%s' used instead.\n",
3720                             *av, default_state_name);
3721                 } else if (state_check_name(*av) == 0)
3722                         action->arg1 = pack_object(tstate, *av,
3723                             IPFW_TLV_STATE_NAME);
3724                 else
3725                         errx(EX_DATAERR, "Invalid state name %s", *av);
3726                 av++;
3727                 break;
3728
3729         case TOK_ACCEPT:
3730                 action->opcode = O_ACCEPT;
3731                 break;
3732
3733         case TOK_DENY:
3734                 action->opcode = O_DENY;
3735                 action->arg1 = 0;
3736                 break;
3737
3738         case TOK_REJECT:
3739                 action->opcode = O_REJECT;
3740                 action->arg1 = ICMP_UNREACH_HOST;
3741                 break;
3742
3743         case TOK_RESET:
3744                 action->opcode = O_REJECT;
3745                 action->arg1 = ICMP_REJECT_RST;
3746                 break;
3747
3748         case TOK_RESET6:
3749                 action->opcode = O_UNREACH6;
3750                 action->arg1 = ICMP6_UNREACH_RST;
3751                 break;
3752
3753         case TOK_UNREACH:
3754                 action->opcode = O_REJECT;
3755                 NEED1("missing reject code");
3756                 fill_reject_code(&action->arg1, *av);
3757                 av++;
3758                 break;
3759
3760         case TOK_UNREACH6:
3761                 action->opcode = O_UNREACH6;
3762                 NEED1("missing unreach code");
3763                 fill_unreach6_code(&action->arg1, *av);
3764                 av++;
3765                 break;
3766
3767         case TOK_COUNT:
3768                 action->opcode = O_COUNT;
3769                 break;
3770
3771         case TOK_NAT:
3772                 action->opcode = O_NAT;
3773                 action->len = F_INSN_SIZE(ipfw_insn_nat);
3774                 CHECK_ACTLEN;
3775                 if (*av != NULL && _substrcmp(*av, "global") == 0) {
3776                         action->arg1 = 0;
3777                         av++;
3778                         break;
3779                 } else
3780                         goto chkarg;
3781         case TOK_QUEUE:
3782                 action->opcode = O_QUEUE;
3783                 goto chkarg;
3784         case TOK_PIPE:
3785                 action->opcode = O_PIPE;
3786                 goto chkarg;
3787         case TOK_SKIPTO:
3788                 action->opcode = O_SKIPTO;
3789                 goto chkarg;
3790         case TOK_NETGRAPH:
3791                 action->opcode = O_NETGRAPH;
3792                 goto chkarg;
3793         case TOK_NGTEE:
3794                 action->opcode = O_NGTEE;
3795                 goto chkarg;
3796         case TOK_DIVERT:
3797                 action->opcode = O_DIVERT;
3798                 goto chkarg;
3799         case TOK_TEE:
3800                 action->opcode = O_TEE;
3801                 goto chkarg;
3802         case TOK_CALL:
3803                 action->opcode = O_CALLRETURN;
3804 chkarg:
3805                 if (!av[0])
3806                         errx(EX_USAGE, "missing argument for %s", *(av - 1));
3807                 if (isdigit(**av)) {
3808                         action->arg1 = strtoul(*av, NULL, 10);
3809                         if (action->arg1 <= 0 || action->arg1 >= IP_FW_TABLEARG)
3810                                 errx(EX_DATAERR, "illegal argument for %s",
3811                                     *(av - 1));
3812                 } else if (_substrcmp(*av, "tablearg") == 0) {
3813                         action->arg1 = IP_FW_TARG;
3814                 } else if (i == TOK_DIVERT || i == TOK_TEE) {
3815                         struct servent *s;
3816                         setservent(1);
3817                         s = getservbyname(av[0], "divert");
3818                         if (s != NULL)
3819                                 action->arg1 = ntohs(s->s_port);
3820                         else
3821                                 errx(EX_DATAERR, "illegal divert/tee port");
3822                 } else
3823                         errx(EX_DATAERR, "illegal argument for %s", *(av - 1));
3824                 av++;
3825                 break;
3826
3827         case TOK_FORWARD: {
3828                 /*
3829                  * Locate the address-port separator (':' or ',').
3830                  * Could be one of the following:
3831                  *      hostname:port
3832                  *      IPv4 a.b.c.d,port
3833                  *      IPv4 a.b.c.d:port
3834                  *      IPv6 w:x:y::z,port
3835                  * The ':' can only be used with hostname and IPv4 address.
3836                  * XXX-BZ Should we also support [w:x:y::z]:port?
3837                  */
3838                 struct sockaddr_storage result;
3839                 struct addrinfo *res;
3840                 char *s, *end;
3841                 int family;
3842                 u_short port_number;
3843
3844                 NEED1("missing forward address[:port]");
3845
3846                 /*
3847                  * locate the address-port separator (':' or ',')
3848                  */
3849                 s = strchr(*av, ',');
3850                 if (s == NULL) {
3851                         /* Distinguish between IPv4:port and IPv6 cases. */
3852                         s = strchr(*av, ':');
3853                         if (s && strchr(s+1, ':'))
3854                                 s = NULL; /* no port */
3855                 }
3856
3857                 port_number = 0;
3858                 if (s != NULL) {
3859                         /* Terminate host portion and set s to start of port. */
3860                         *(s++) = '\0';
3861                         i = strtoport(s, &end, 0 /* base */, 0 /* proto */);
3862                         if (s == end)
3863                                 errx(EX_DATAERR,
3864                                     "illegal forwarding port ``%s''", s);
3865                         port_number = (u_short)i;
3866                 }
3867
3868                 if (_substrcmp(*av, "tablearg") == 0) {
3869                         family = PF_INET;
3870                         ((struct sockaddr_in*)&result)->sin_addr.s_addr =
3871                             INADDR_ANY;
3872                 } else {
3873                         /*
3874                          * Resolve the host name or address to a family and a
3875                          * network representation of the address.
3876                          */
3877                         if (getaddrinfo(*av, NULL, NULL, &res))
3878                                 errx(EX_DATAERR, NULL);
3879                         /* Just use the first host in the answer. */
3880                         family = res->ai_family;
3881                         memcpy(&result, res->ai_addr, res->ai_addrlen);
3882                         freeaddrinfo(res);
3883                 }
3884
3885                 if (family == PF_INET) {
3886                         ipfw_insn_sa *p = (ipfw_insn_sa *)action;
3887
3888                         action->opcode = O_FORWARD_IP;
3889                         action->len = F_INSN_SIZE(ipfw_insn_sa);
3890                         CHECK_ACTLEN;
3891
3892                         /*
3893                          * In the kernel we assume AF_INET and use only
3894                          * sin_port and sin_addr. Remember to set sin_len as
3895                          * the routing code seems to use it too.
3896                          */
3897                         p->sa.sin_len = sizeof(struct sockaddr_in);
3898                         p->sa.sin_family = AF_INET;
3899                         p->sa.sin_port = port_number;
3900                         p->sa.sin_addr.s_addr =
3901                              ((struct sockaddr_in *)&result)->sin_addr.s_addr;
3902                 } else if (family == PF_INET6) {
3903                         ipfw_insn_sa6 *p = (ipfw_insn_sa6 *)action;
3904
3905                         action->opcode = O_FORWARD_IP6;
3906                         action->len = F_INSN_SIZE(ipfw_insn_sa6);
3907                         CHECK_ACTLEN;
3908
3909                         p->sa.sin6_len = sizeof(struct sockaddr_in6);
3910                         p->sa.sin6_family = AF_INET6;
3911                         p->sa.sin6_port = port_number;
3912                         p->sa.sin6_flowinfo = 0;
3913                         p->sa.sin6_scope_id =
3914                             ((struct sockaddr_in6 *)&result)->sin6_scope_id;
3915                         bcopy(&((struct sockaddr_in6*)&result)->sin6_addr,
3916                             &p->sa.sin6_addr, sizeof(p->sa.sin6_addr));
3917                 } else {
3918                         errx(EX_DATAERR, "Invalid address family in forward action");
3919                 }
3920                 av++;
3921                 break;
3922             }
3923         case TOK_COMMENT:
3924                 /* pretend it is a 'count' rule followed by the comment */
3925                 action->opcode = O_COUNT;
3926                 av--;           /* go back... */
3927                 break;
3928
3929         case TOK_SETFIB:
3930             {
3931                 int numfibs;
3932                 size_t intsize = sizeof(int);
3933
3934                 action->opcode = O_SETFIB;
3935                 NEED1("missing fib number");
3936                 if (_substrcmp(*av, "tablearg") == 0) {
3937                         action->arg1 = IP_FW_TARG;
3938                 } else {
3939                         action->arg1 = strtoul(*av, NULL, 10);
3940                         if (sysctlbyname("net.fibs", &numfibs, &intsize,
3941                             NULL, 0) == -1)
3942                                 errx(EX_DATAERR, "fibs not suported.\n");
3943                         if (action->arg1 >= numfibs)  /* Temporary */
3944                                 errx(EX_DATAERR, "fib too large.\n");
3945                         /* Add high-order bit to fib to make room for tablearg*/
3946                         action->arg1 |= 0x8000;
3947                 }
3948                 av++;
3949                 break;
3950             }
3951
3952         case TOK_SETDSCP:
3953             {
3954                 int code;
3955
3956                 action->opcode = O_SETDSCP;
3957                 NEED1("missing DSCP code");
3958                 if (_substrcmp(*av, "tablearg") == 0) {
3959                         action->arg1 = IP_FW_TARG;
3960                 } else if (isalpha(*av[0])) {
3961                         if ((code = match_token(f_ipdscp, *av)) == -1)
3962                                 errx(EX_DATAERR, "Unknown DSCP code");
3963                         action->arg1 = code;
3964                 } else
3965                         action->arg1 = strtoul(*av, NULL, 10);
3966                 /* Add high-order bit to DSCP to make room for tablearg */
3967                 if (action->arg1 != IP_FW_TARG)
3968                         action->arg1 |= 0x8000;
3969                 av++;
3970                 break;
3971             }
3972
3973         case TOK_REASS:
3974                 action->opcode = O_REASS;
3975                 break;
3976
3977         case TOK_RETURN:
3978                 fill_cmd(action, O_CALLRETURN, F_NOT, 0);
3979                 break;
3980
3981         default:
3982                 av--;
3983                 if (match_token(rule_eactions, *av) == -1)
3984                         errx(EX_DATAERR, "invalid action %s\n", *av);
3985                 /*
3986                  * External actions support.
3987                  * XXX: we support only syntax with instance name.
3988                  *      For known external actions (from rule_eactions list)
3989                  *      we can handle syntax directly. But with `eaction'
3990                  *      keyword we can use only `eaction <name> <instance>'
3991                  *      syntax.
3992                  */
3993         case TOK_EACTION: {
3994                 uint16_t idx;
3995
3996                 NEED1("Missing eaction name");
3997                 if (eaction_check_name(*av) != 0)
3998                         errx(EX_DATAERR, "Invalid eaction name %s", *av);
3999                 idx = pack_object(tstate, *av, IPFW_TLV_EACTION);
4000                 if (idx == 0)
4001                         errx(EX_DATAERR, "pack_object failed");
4002                 fill_cmd(action, O_EXTERNAL_ACTION, 0, idx);
4003                 av++;
4004                 NEED1("Missing eaction instance name");
4005                 action = next_cmd(action, &ablen);
4006                 action->len = 1;
4007                 CHECK_ACTLEN;
4008                 if (eaction_check_name(*av) != 0)
4009                         errx(EX_DATAERR, "Invalid eaction instance name %s",
4010                             *av);
4011                 /*
4012                  * External action instance object has TLV type depended
4013                  * from the external action name object index. Since we
4014                  * currently don't know this index, use zero as TLV type.
4015                  */
4016                 idx = pack_object(tstate, *av, 0);
4017                 if (idx == 0)
4018                         errx(EX_DATAERR, "pack_object failed");
4019                 fill_cmd(action, O_EXTERNAL_INSTANCE, 0, idx);
4020                 av++;
4021                 }
4022         }
4023         action = next_cmd(action, &ablen);
4024
4025         /*
4026          * [altq queuename] -- altq tag, optional
4027          * [log [logamount N]]  -- log, optional
4028          *
4029          * If they exist, it go first in the cmdbuf, but then it is
4030          * skipped in the copy section to the end of the buffer.
4031          */
4032         while (av[0] != NULL && (i = match_token(rule_action_params, *av)) != -1) {
4033                 av++;
4034                 switch (i) {
4035                 case TOK_LOG:
4036                     {
4037                         ipfw_insn_log *c = (ipfw_insn_log *)cmd;
4038                         int l;
4039
4040                         if (have_log)
4041                                 errx(EX_DATAERR,
4042                                     "log cannot be specified more than once");
4043                         have_log = (ipfw_insn *)c;
4044                         cmd->len = F_INSN_SIZE(ipfw_insn_log);
4045                         CHECK_CMDLEN;
4046                         cmd->opcode = O_LOG;
4047                         if (av[0] && _substrcmp(*av, "logamount") == 0) {
4048                                 av++;
4049                                 NEED1("logamount requires argument");
4050                                 l = atoi(*av);
4051                                 if (l < 0)
4052                                         errx(EX_DATAERR,
4053                                             "logamount must be positive");
4054                                 c->max_log = l;
4055                                 av++;
4056                         } else {
4057                                 len = sizeof(c->max_log);
4058                                 if (sysctlbyname("net.inet.ip.fw.verbose_limit",
4059                                     &c->max_log, &len, NULL, 0) == -1) {
4060                                         if (co.test_only) {
4061                                                 c->max_log = 0;
4062                                                 break;
4063                                         }
4064                                         errx(1, "sysctlbyname(\"%s\")",
4065                                             "net.inet.ip.fw.verbose_limit");
4066                                 }
4067                         }
4068                     }
4069                         break;
4070
4071 #ifndef NO_ALTQ
4072                 case TOK_ALTQ:
4073                     {
4074                         ipfw_insn_altq *a = (ipfw_insn_altq *)cmd;
4075
4076                         NEED1("missing altq queue name");
4077                         if (have_altq)
4078                                 errx(EX_DATAERR,
4079                                     "altq cannot be specified more than once");
4080                         have_altq = (ipfw_insn *)a;
4081                         cmd->len = F_INSN_SIZE(ipfw_insn_altq);
4082                         CHECK_CMDLEN;
4083                         cmd->opcode = O_ALTQ;
4084                         a->qid = altq_name_to_qid(*av);
4085                         av++;
4086                     }
4087                         break;
4088 #endif
4089
4090                 case TOK_TAG:
4091                 case TOK_UNTAG: {
4092                         uint16_t tag;
4093
4094                         if (have_tag)
4095                                 errx(EX_USAGE, "tag and untag cannot be "
4096                                     "specified more than once");
4097                         GET_UINT_ARG(tag, IPFW_ARG_MIN, IPFW_ARG_MAX, i,
4098                            rule_action_params);
4099                         have_tag = cmd;
4100                         fill_cmd(cmd, O_TAG, (i == TOK_TAG) ? 0: F_NOT, tag);
4101                         av++;
4102                         break;
4103                 }
4104
4105                 default:
4106                         abort();
4107                 }
4108                 cmd = next_cmd(cmd, &cblen);
4109         }
4110
4111         if (have_state) /* must be a check-state, we are done */
4112                 goto done;
4113
4114 #define OR_START(target)                                        \
4115         if (av[0] && (*av[0] == '(' || *av[0] == '{')) {        \
4116                 if (open_par)                                   \
4117                         errx(EX_USAGE, "nested \"(\" not allowed\n"); \
4118                 prev = NULL;                                    \
4119                 open_par = 1;                                   \
4120                 if ( (av[0])[1] == '\0') {                      \
4121                         av++;                                   \
4122                 } else                                          \
4123                         (*av)++;                                \
4124         }                                                       \
4125         target:                                                 \
4126
4127
4128 #define CLOSE_PAR                                               \
4129         if (open_par) {                                         \
4130                 if (av[0] && (                                  \
4131                     strcmp(*av, ")") == 0 ||                    \
4132                     strcmp(*av, "}") == 0)) {                   \
4133                         prev = NULL;                            \
4134                         open_par = 0;                           \
4135                         av++;                                   \
4136                 } else                                          \
4137                         errx(EX_USAGE, "missing \")\"\n");      \
4138         }
4139
4140 #define NOT_BLOCK                                               \
4141         if (av[0] && _substrcmp(*av, "not") == 0) {             \
4142                 if (cmd->len & F_NOT)                           \
4143                         errx(EX_USAGE, "double \"not\" not allowed\n"); \
4144                 cmd->len |= F_NOT;                              \
4145                 av++;                                           \
4146         }
4147
4148 #define OR_BLOCK(target)                                        \
4149         if (av[0] && _substrcmp(*av, "or") == 0) {              \
4150                 if (prev == NULL || open_par == 0)              \
4151                         errx(EX_DATAERR, "invalid OR block");   \
4152                 prev->len |= F_OR;                              \
4153                 av++;                                   \
4154                 goto target;                                    \
4155         }                                                       \
4156         CLOSE_PAR;
4157
4158         first_cmd = cmd;
4159
4160 #if 0
4161         /*
4162          * MAC addresses, optional.
4163          * If we have this, we skip the part "proto from src to dst"
4164          * and jump straight to the option parsing.
4165          */
4166         NOT_BLOCK;
4167         NEED1("missing protocol");
4168         if (_substrcmp(*av, "MAC") == 0 ||
4169             _substrcmp(*av, "mac") == 0) {
4170                 av++;                   /* the "MAC" keyword */
4171                 add_mac(cmd, av);       /* exits in case of errors */
4172                 cmd = next_cmd(cmd);
4173                 av += 2;                /* dst-mac and src-mac */
4174                 NOT_BLOCK;
4175                 NEED1("missing mac type");
4176                 if (add_mactype(cmd, av[0]))
4177                         cmd = next_cmd(cmd);
4178                 av++;                   /* any or mac-type */
4179                 goto read_options;
4180         }
4181 #endif
4182
4183         /*
4184          * protocol, mandatory
4185          */
4186     OR_START(get_proto);
4187         NOT_BLOCK;
4188         NEED1("missing protocol");
4189         if (add_proto_compat(cmd, *av, &proto)) {
4190                 av++;
4191                 if (F_LEN(cmd) != 0) {
4192                         prev = cmd;
4193                         cmd = next_cmd(cmd, &cblen);
4194                 }
4195         } else if (first_cmd != cmd) {
4196                 errx(EX_DATAERR, "invalid protocol ``%s''", *av);
4197         } else
4198                 goto read_options;
4199     OR_BLOCK(get_proto);
4200
4201         /*
4202          * "from", mandatory
4203          */
4204         if ((av[0] == NULL) || _substrcmp(*av, "from") != 0)
4205                 errx(EX_USAGE, "missing ``from''");
4206         av++;
4207
4208         /*
4209          * source IP, mandatory
4210          */
4211     OR_START(source_ip);
4212         NOT_BLOCK;      /* optional "not" */
4213         NEED1("missing source address");
4214         if (add_src(cmd, *av, proto, cblen, tstate)) {
4215                 av++;
4216                 if (F_LEN(cmd) != 0) {  /* ! any */
4217                         prev = cmd;
4218                         cmd = next_cmd(cmd, &cblen);
4219                 }
4220         } else
4221                 errx(EX_USAGE, "bad source address %s", *av);
4222     OR_BLOCK(source_ip);
4223
4224         /*
4225          * source ports, optional
4226          */
4227         NOT_BLOCK;      /* optional "not" */
4228         if ( av[0] != NULL ) {
4229                 if (_substrcmp(*av, "any") == 0 ||
4230                     add_ports(cmd, *av, proto, O_IP_SRCPORT, cblen)) {
4231                         av++;
4232                         if (F_LEN(cmd) != 0)
4233                                 cmd = next_cmd(cmd, &cblen);
4234                 }
4235         }
4236
4237         /*
4238          * "to", mandatory
4239          */
4240         if ( (av[0] == NULL) || _substrcmp(*av, "to") != 0 )
4241                 errx(EX_USAGE, "missing ``to''");
4242         av++;
4243
4244         /*
4245          * destination, mandatory
4246          */
4247     OR_START(dest_ip);
4248         NOT_BLOCK;      /* optional "not" */
4249         NEED1("missing dst address");
4250         if (add_dst(cmd, *av, proto, cblen, tstate)) {
4251                 av++;
4252                 if (F_LEN(cmd) != 0) {  /* ! any */
4253                         prev = cmd;
4254                         cmd = next_cmd(cmd, &cblen);
4255                 }
4256         } else
4257                 errx( EX_USAGE, "bad destination address %s", *av);
4258     OR_BLOCK(dest_ip);
4259
4260         /*
4261          * dest. ports, optional
4262          */
4263         NOT_BLOCK;      /* optional "not" */
4264         if (av[0]) {
4265                 if (_substrcmp(*av, "any") == 0 ||
4266                     add_ports(cmd, *av, proto, O_IP_DSTPORT, cblen)) {
4267                         av++;
4268                         if (F_LEN(cmd) != 0)
4269                                 cmd = next_cmd(cmd, &cblen);
4270                 }
4271         }
4272
4273 read_options:
4274         if (av[0] && first_cmd == cmd) {
4275                 /*
4276                  * nothing specified so far, store in the rule to ease
4277                  * printout later.
4278                  */
4279                  rule->flags |= IPFW_RULE_NOOPT;
4280         }
4281         prev = NULL;
4282         while ( av[0] != NULL ) {
4283                 char *s;
4284                 ipfw_insn_u32 *cmd32;   /* alias for cmd */
4285
4286                 s = *av;
4287                 cmd32 = (ipfw_insn_u32 *)cmd;
4288
4289                 if (*s == '!') {        /* alternate syntax for NOT */
4290                         if (cmd->len & F_NOT)
4291                                 errx(EX_USAGE, "double \"not\" not allowed\n");
4292                         cmd->len = F_NOT;
4293                         s++;
4294                 }
4295                 i = match_token(rule_options, s);
4296                 av++;
4297                 switch(i) {
4298                 case TOK_NOT:
4299                         if (cmd->len & F_NOT)
4300                                 errx(EX_USAGE, "double \"not\" not allowed\n");
4301                         cmd->len = F_NOT;
4302                         break;
4303
4304                 case TOK_OR:
4305                         if (open_par == 0 || prev == NULL)
4306                                 errx(EX_USAGE, "invalid \"or\" block\n");
4307                         prev->len |= F_OR;
4308                         break;
4309
4310                 case TOK_STARTBRACE:
4311                         if (open_par)
4312                                 errx(EX_USAGE, "+nested \"(\" not allowed\n");
4313                         open_par = 1;
4314                         break;
4315
4316                 case TOK_ENDBRACE:
4317                         if (!open_par)
4318                                 errx(EX_USAGE, "+missing \")\"\n");
4319                         open_par = 0;
4320                         prev = NULL;
4321                         break;
4322
4323                 case TOK_IN:
4324                         fill_cmd(cmd, O_IN, 0, 0);
4325                         break;
4326
4327                 case TOK_OUT:
4328                         cmd->len ^= F_NOT; /* toggle F_NOT */
4329                         fill_cmd(cmd, O_IN, 0, 0);
4330                         break;
4331
4332                 case TOK_DIVERTED:
4333                         fill_cmd(cmd, O_DIVERTED, 0, 3);
4334                         break;
4335
4336                 case TOK_DIVERTEDLOOPBACK:
4337                         fill_cmd(cmd, O_DIVERTED, 0, 1);
4338                         break;
4339
4340                 case TOK_DIVERTEDOUTPUT:
4341                         fill_cmd(cmd, O_DIVERTED, 0, 2);
4342                         break;
4343
4344                 case TOK_FRAG:
4345                         fill_cmd(cmd, O_FRAG, 0, 0);
4346                         break;
4347
4348                 case TOK_LAYER2:
4349                         fill_cmd(cmd, O_LAYER2, 0, 0);
4350                         break;
4351
4352                 case TOK_XMIT:
4353                 case TOK_RECV:
4354                 case TOK_VIA:
4355                         NEED1("recv, xmit, via require interface name"
4356                                 " or address");
4357                         fill_iface((ipfw_insn_if *)cmd, av[0], cblen, tstate);
4358                         av++;
4359                         if (F_LEN(cmd) == 0)    /* not a valid address */
4360                                 break;
4361                         if (i == TOK_XMIT)
4362                                 cmd->opcode = O_XMIT;
4363                         else if (i == TOK_RECV)
4364                                 cmd->opcode = O_RECV;
4365                         else if (i == TOK_VIA)
4366                                 cmd->opcode = O_VIA;
4367                         break;
4368
4369                 case TOK_ICMPTYPES:
4370                         NEED1("icmptypes requires list of types");
4371                         fill_icmptypes((ipfw_insn_u32 *)cmd, *av);
4372                         av++;
4373                         break;
4374
4375                 case TOK_ICMP6TYPES:
4376                         NEED1("icmptypes requires list of types");
4377                         fill_icmp6types((ipfw_insn_icmp6 *)cmd, *av, cblen);
4378                         av++;
4379                         break;
4380
4381                 case TOK_IPTTL:
4382                         NEED1("ipttl requires TTL");
4383                         if (strpbrk(*av, "-,")) {
4384                             if (!add_ports(cmd, *av, 0, O_IPTTL, cblen))
4385                                 errx(EX_DATAERR, "invalid ipttl %s", *av);
4386                         } else
4387                             fill_cmd(cmd, O_IPTTL, 0, strtoul(*av, NULL, 0));
4388                         av++;
4389                         break;
4390
4391                 case TOK_IPID:
4392                         NEED1("ipid requires id");
4393                         if (strpbrk(*av, "-,")) {
4394                             if (!add_ports(cmd, *av, 0, O_IPID, cblen))
4395                                 errx(EX_DATAERR, "invalid ipid %s", *av);
4396                         } else
4397                             fill_cmd(cmd, O_IPID, 0, strtoul(*av, NULL, 0));
4398                         av++;
4399                         break;
4400
4401                 case TOK_IPLEN:
4402                         NEED1("iplen requires length");
4403                         if (strpbrk(*av, "-,")) {
4404                             if (!add_ports(cmd, *av, 0, O_IPLEN, cblen))
4405                                 errx(EX_DATAERR, "invalid ip len %s", *av);
4406                         } else
4407                             fill_cmd(cmd, O_IPLEN, 0, strtoul(*av, NULL, 0));
4408                         av++;
4409                         break;
4410
4411                 case TOK_IPVER:
4412                         NEED1("ipver requires version");
4413                         fill_cmd(cmd, O_IPVER, 0, strtoul(*av, NULL, 0));
4414                         av++;
4415                         break;
4416
4417                 case TOK_IPPRECEDENCE:
4418                         NEED1("ipprecedence requires value");
4419                         fill_cmd(cmd, O_IPPRECEDENCE, 0,
4420                             (strtoul(*av, NULL, 0) & 7) << 5);
4421                         av++;
4422                         break;
4423
4424                 case TOK_DSCP:
4425                         NEED1("missing DSCP code");
4426                         fill_dscp(cmd, *av, cblen);
4427                         av++;
4428                         break;
4429
4430                 case TOK_IPOPTS:
4431                         NEED1("missing argument for ipoptions");
4432                         fill_flags_cmd(cmd, O_IPOPT, f_ipopts, *av);
4433                         av++;
4434                         break;
4435
4436                 case TOK_IPTOS:
4437                         NEED1("missing argument for iptos");
4438                         fill_flags_cmd(cmd, O_IPTOS, f_iptos, *av);
4439                         av++;
4440                         break;
4441
4442                 case TOK_UID:
4443                         NEED1("uid requires argument");
4444                     {
4445                         char *end;
4446                         uid_t uid;
4447                         struct passwd *pwd;
4448
4449                         cmd->opcode = O_UID;
4450                         uid = strtoul(*av, &end, 0);
4451                         pwd = (*end == '\0') ? getpwuid(uid) : getpwnam(*av);
4452                         if (pwd == NULL)
4453                                 errx(EX_DATAERR, "uid \"%s\" nonexistent", *av);
4454                         cmd32->d[0] = pwd->pw_uid;
4455                         cmd->len |= F_INSN_SIZE(ipfw_insn_u32);
4456                         av++;
4457                     }
4458                         break;
4459
4460                 case TOK_GID:
4461                         NEED1("gid requires argument");
4462                     {
4463                         char *end;
4464                         gid_t gid;
4465                         struct group *grp;
4466
4467                         cmd->opcode = O_GID;
4468                         gid = strtoul(*av, &end, 0);
4469                         grp = (*end == '\0') ? getgrgid(gid) : getgrnam(*av);
4470                         if (grp == NULL)
4471                                 errx(EX_DATAERR, "gid \"%s\" nonexistent", *av);
4472                         cmd32->d[0] = grp->gr_gid;
4473                         cmd->len |= F_INSN_SIZE(ipfw_insn_u32);
4474                         av++;
4475                     }
4476                         break;
4477
4478                 case TOK_JAIL:
4479                         NEED1("jail requires argument");
4480                     {
4481                         char *end;
4482                         int jid;
4483
4484                         cmd->opcode = O_JAIL;
4485                         jid = (int)strtol(*av, &end, 0);
4486                         if (jid < 0 || *end != '\0')
4487                                 errx(EX_DATAERR, "jail requires prison ID");
4488                         cmd32->d[0] = (uint32_t)jid;
4489                         cmd->len |= F_INSN_SIZE(ipfw_insn_u32);
4490                         av++;
4491                     }
4492                         break;
4493
4494                 case TOK_ESTAB:
4495                         fill_cmd(cmd, O_ESTAB, 0, 0);
4496                         break;
4497
4498                 case TOK_SETUP:
4499                         fill_cmd(cmd, O_TCPFLAGS, 0,
4500                                 (TH_SYN) | ( (TH_ACK) & 0xff) <<8 );
4501                         break;
4502
4503                 case TOK_TCPDATALEN:
4504                         NEED1("tcpdatalen requires length");
4505                         if (strpbrk(*av, "-,")) {
4506                             if (!add_ports(cmd, *av, 0, O_TCPDATALEN, cblen))
4507                                 errx(EX_DATAERR, "invalid tcpdata len %s", *av);
4508                         } else
4509                             fill_cmd(cmd, O_TCPDATALEN, 0,
4510                                     strtoul(*av, NULL, 0));
4511                         av++;
4512                         break;
4513
4514                 case TOK_TCPOPTS:
4515                         NEED1("missing argument for tcpoptions");
4516                         fill_flags_cmd(cmd, O_TCPOPTS, f_tcpopts, *av);
4517                         av++;
4518                         break;
4519
4520                 case TOK_TCPSEQ:
4521                 case TOK_TCPACK:
4522                         NEED1("tcpseq/tcpack requires argument");
4523                         cmd->len = F_INSN_SIZE(ipfw_insn_u32);
4524                         cmd->opcode = (i == TOK_TCPSEQ) ? O_TCPSEQ : O_TCPACK;
4525                         cmd32->d[0] = htonl(strtoul(*av, NULL, 0));
4526                         av++;
4527                         break;
4528
4529                 case TOK_TCPWIN:
4530                         NEED1("tcpwin requires length");
4531                         if (strpbrk(*av, "-,")) {
4532                             if (!add_ports(cmd, *av, 0, O_TCPWIN, cblen))
4533                                 errx(EX_DATAERR, "invalid tcpwin len %s", *av);
4534                         } else
4535                             fill_cmd(cmd, O_TCPWIN, 0,
4536                                     strtoul(*av, NULL, 0));
4537                         av++;
4538                         break;
4539
4540                 case TOK_TCPFLAGS:
4541                         NEED1("missing argument for tcpflags");
4542                         cmd->opcode = O_TCPFLAGS;
4543                         fill_flags_cmd(cmd, O_TCPFLAGS, f_tcpflags, *av);
4544                         av++;
4545                         break;
4546
4547                 case TOK_KEEPSTATE: {
4548                         uint16_t uidx;
4549
4550                         if (open_par)
4551                                 errx(EX_USAGE, "keep-state cannot be part "
4552                                     "of an or block");
4553                         if (have_state)
4554                                 errx(EX_USAGE, "only one of keep-state "
4555                                         "and limit is allowed");
4556                         if (*av == NULL ||
4557                             match_token(rule_options, *av) != -1) {
4558                                 if (*av != NULL)
4559                                         warn("Ambiguous state name '%s',"
4560                                             " '%s' used instead.\n", *av,
4561                                             default_state_name);
4562                                 uidx = pack_object(tstate, default_state_name,
4563                                     IPFW_TLV_STATE_NAME);
4564                         } else {
4565                                 if (state_check_name(*av) != 0)
4566                                         errx(EX_DATAERR,
4567                                             "Invalid state name %s", *av);
4568                                 uidx = pack_object(tstate, *av,
4569                                     IPFW_TLV_STATE_NAME);
4570                                 av++;
4571                         }
4572                         have_state = cmd;
4573                         fill_cmd(cmd, O_KEEP_STATE, 0, uidx);
4574                         break;
4575                 }
4576
4577                 case TOK_LIMIT: {
4578                         ipfw_insn_limit *c = (ipfw_insn_limit *)cmd;
4579                         int val;
4580
4581                         if (open_par)
4582                                 errx(EX_USAGE,
4583                                     "limit cannot be part of an or block");
4584                         if (have_state)
4585                                 errx(EX_USAGE, "only one of keep-state and "
4586                                     "limit is allowed");
4587                         have_state = cmd;
4588
4589                         cmd->len = F_INSN_SIZE(ipfw_insn_limit);
4590                         CHECK_CMDLEN;
4591                         cmd->opcode = O_LIMIT;
4592                         c->limit_mask = c->conn_limit = 0;
4593
4594                         while ( av[0] != NULL ) {
4595                                 if ((val = match_token(limit_masks, *av)) <= 0)
4596                                         break;
4597                                 c->limit_mask |= val;
4598                                 av++;
4599                         }
4600
4601                         if (c->limit_mask == 0)
4602                                 errx(EX_USAGE, "limit: missing limit mask");
4603
4604                         GET_UINT_ARG(c->conn_limit, IPFW_ARG_MIN, IPFW_ARG_MAX,
4605                             TOK_LIMIT, rule_options);
4606                         av++;
4607
4608                         if (*av == NULL ||
4609                             match_token(rule_options, *av) != -1) {
4610                                 if (*av != NULL)
4611                                         warn("Ambiguous state name '%s',"
4612                                             " '%s' used instead.\n", *av,
4613                                             default_state_name);
4614                                 cmd->arg1 = pack_object(tstate,
4615                                     default_state_name, IPFW_TLV_STATE_NAME);
4616                         } else {
4617                                 if (state_check_name(*av) != 0)
4618                                         errx(EX_DATAERR,
4619                                             "Invalid state name %s", *av);
4620                                 cmd->arg1 = pack_object(tstate, *av,
4621                                     IPFW_TLV_STATE_NAME);
4622                                 av++;
4623                         }
4624                         break;
4625                 }
4626
4627                 case TOK_PROTO:
4628                         NEED1("missing protocol");
4629                         if (add_proto(cmd, *av, &proto)) {
4630                                 av++;
4631                         } else
4632                                 errx(EX_DATAERR, "invalid protocol ``%s''",
4633                                     *av);
4634                         break;
4635
4636                 case TOK_SRCIP:
4637                         NEED1("missing source IP");
4638                         if (add_srcip(cmd, *av, cblen, tstate)) {
4639                                 av++;
4640                         }
4641                         break;
4642
4643                 case TOK_DSTIP:
4644                         NEED1("missing destination IP");
4645                         if (add_dstip(cmd, *av, cblen, tstate)) {
4646                                 av++;
4647                         }
4648                         break;
4649
4650                 case TOK_SRCIP6:
4651                         NEED1("missing source IP6");
4652                         if (add_srcip6(cmd, *av, cblen)) {
4653                                 av++;
4654                         }
4655                         break;
4656
4657                 case TOK_DSTIP6:
4658                         NEED1("missing destination IP6");
4659                         if (add_dstip6(cmd, *av, cblen)) {
4660                                 av++;
4661                         }
4662                         break;
4663
4664                 case TOK_SRCPORT:
4665                         NEED1("missing source port");
4666                         if (_substrcmp(*av, "any") == 0 ||
4667                             add_ports(cmd, *av, proto, O_IP_SRCPORT, cblen)) {
4668                                 av++;
4669                         } else
4670                                 errx(EX_DATAERR, "invalid source port %s", *av);
4671                         break;
4672
4673                 case TOK_DSTPORT:
4674                         NEED1("missing destination port");
4675                         if (_substrcmp(*av, "any") == 0 ||
4676                             add_ports(cmd, *av, proto, O_IP_DSTPORT, cblen)) {
4677                                 av++;
4678                         } else
4679                                 errx(EX_DATAERR, "invalid destination port %s",
4680                                     *av);
4681                         break;
4682
4683                 case TOK_MAC:
4684                         if (add_mac(cmd, av, cblen))
4685                                 av += 2;
4686                         break;
4687
4688                 case TOK_MACTYPE:
4689                         NEED1("missing mac type");
4690                         if (!add_mactype(cmd, *av, cblen))
4691                                 errx(EX_DATAERR, "invalid mac type %s", *av);
4692                         av++;
4693                         break;
4694
4695                 case TOK_VERREVPATH:
4696                         fill_cmd(cmd, O_VERREVPATH, 0, 0);
4697                         break;
4698
4699                 case TOK_VERSRCREACH:
4700                         fill_cmd(cmd, O_VERSRCREACH, 0, 0);
4701                         break;
4702
4703                 case TOK_ANTISPOOF:
4704                         fill_cmd(cmd, O_ANTISPOOF, 0, 0);
4705                         break;
4706
4707                 case TOK_IPSEC:
4708                         fill_cmd(cmd, O_IPSEC, 0, 0);
4709                         break;
4710
4711                 case TOK_IPV6:
4712                         fill_cmd(cmd, O_IP6, 0, 0);
4713                         break;
4714
4715                 case TOK_IPV4:
4716                         fill_cmd(cmd, O_IP4, 0, 0);
4717                         break;
4718
4719                 case TOK_EXT6HDR:
4720                         fill_ext6hdr( cmd, *av );
4721                         av++;
4722                         break;
4723
4724                 case TOK_FLOWID:
4725                         if (proto != IPPROTO_IPV6 )
4726                                 errx( EX_USAGE, "flow-id filter is active "
4727                                     "only for ipv6 protocol\n");
4728                         fill_flow6( (ipfw_insn_u32 *) cmd, *av, cblen);
4729                         av++;
4730                         break;
4731
4732                 case TOK_COMMENT:
4733                         fill_comment(cmd, av, cblen);
4734                         av[0]=NULL;
4735                         break;
4736
4737                 case TOK_TAGGED:
4738                         if (av[0] && strpbrk(*av, "-,")) {
4739                                 if (!add_ports(cmd, *av, 0, O_TAGGED, cblen))
4740                                         errx(EX_DATAERR, "tagged: invalid tag"
4741                                             " list: %s", *av);
4742                         }
4743                         else {
4744                                 uint16_t tag;
4745
4746                                 GET_UINT_ARG(tag, IPFW_ARG_MIN, IPFW_ARG_MAX,
4747                                     TOK_TAGGED, rule_options);
4748                                 fill_cmd(cmd, O_TAGGED, 0, tag);
4749                         }
4750                         av++;
4751                         break;
4752
4753                 case TOK_FIB:
4754                         NEED1("fib requires fib number");
4755                         fill_cmd(cmd, O_FIB, 0, strtoul(*av, NULL, 0));
4756                         av++;
4757                         break;
4758                 case TOK_SOCKARG:
4759                         fill_cmd(cmd, O_SOCKARG, 0, 0);
4760                         break;
4761
4762                 case TOK_LOOKUP: {
4763                         ipfw_insn_u32 *c = (ipfw_insn_u32 *)cmd;
4764                         int j;
4765
4766                         if (!av[0] || !av[1])
4767                                 errx(EX_USAGE, "format: lookup argument tablenum");
4768                         cmd->opcode = O_IP_DST_LOOKUP;
4769                         cmd->len |= F_INSN_SIZE(ipfw_insn) + 2;
4770                         i = match_token(rule_options, *av);
4771                         for (j = 0; lookup_key[j] >= 0 ; j++) {
4772                                 if (i == lookup_key[j])
4773                                         break;
4774                         }
4775                         if (lookup_key[j] <= 0)
4776                                 errx(EX_USAGE, "format: cannot lookup on %s", *av);
4777                         __PAST_END(c->d, 1) = j; // i converted to option
4778                         av++;
4779
4780                         if ((j = pack_table(tstate, *av)) == 0)
4781                                 errx(EX_DATAERR, "Invalid table name: %s", *av);
4782
4783                         cmd->arg1 = j;
4784                         av++;
4785                     }
4786                         break;
4787                 case TOK_FLOW:
4788                         NEED1("missing table name");
4789                         if (strncmp(*av, "table(", 6) != 0)
4790                                 errx(EX_DATAERR,
4791                                     "enclose table name into \"table()\"");
4792                         fill_table(cmd, *av, O_IP_FLOW_LOOKUP, tstate);
4793                         av++;
4794                         break;
4795
4796                 default:
4797                         errx(EX_USAGE, "unrecognised option [%d] %s\n", i, s);
4798                 }
4799                 if (F_LEN(cmd) > 0) {   /* prepare to advance */
4800                         prev = cmd;
4801                         cmd = next_cmd(cmd, &cblen);
4802                 }
4803         }
4804
4805 done:
4806         /*
4807          * Now copy stuff into the rule.
4808          * If we have a keep-state option, the first instruction
4809          * must be a PROBE_STATE (which is generated here).
4810          * If we have a LOG option, it was stored as the first command,
4811          * and now must be moved to the top of the action part.
4812          */
4813         dst = (ipfw_insn *)rule->cmd;
4814
4815         /*
4816          * First thing to write into the command stream is the match probability.
4817          */
4818         if (match_prob != 1) { /* 1 means always match */
4819                 dst->opcode = O_PROB;
4820                 dst->len = 2;
4821                 *((int32_t *)(dst+1)) = (int32_t)(match_prob * 0x7fffffff);
4822                 dst += dst->len;
4823         }
4824
4825         /*
4826          * generate O_PROBE_STATE if necessary
4827          */
4828         if (have_state && have_state->opcode != O_CHECK_STATE) {
4829                 fill_cmd(dst, O_PROBE_STATE, 0, have_state->arg1);
4830                 dst = next_cmd(dst, &rblen);
4831         }
4832
4833         /* copy all commands but O_LOG, O_KEEP_STATE, O_LIMIT, O_ALTQ, O_TAG */
4834         for (src = (ipfw_insn *)cmdbuf; src != cmd; src += i) {
4835                 i = F_LEN(src);
4836                 CHECK_RBUFLEN(i);
4837
4838                 switch (src->opcode) {
4839                 case O_LOG:
4840                 case O_KEEP_STATE:
4841                 case O_LIMIT:
4842                 case O_ALTQ:
4843                 case O_TAG:
4844                         break;
4845                 default:
4846                         bcopy(src, dst, i * sizeof(uint32_t));
4847                         dst += i;
4848                 }
4849         }
4850
4851         /*
4852          * put back the have_state command as last opcode
4853          */
4854         if (have_state && have_state->opcode != O_CHECK_STATE) {
4855                 i = F_LEN(have_state);
4856                 CHECK_RBUFLEN(i);
4857                 bcopy(have_state, dst, i * sizeof(uint32_t));
4858                 dst += i;
4859         }
4860         /*
4861          * start action section
4862          */
4863         rule->act_ofs = dst - rule->cmd;
4864
4865         /* put back O_LOG, O_ALTQ, O_TAG if necessary */
4866         if (have_log) {
4867                 i = F_LEN(have_log);
4868                 CHECK_RBUFLEN(i);
4869                 bcopy(have_log, dst, i * sizeof(uint32_t));
4870                 dst += i;
4871         }
4872         if (have_altq) {
4873                 i = F_LEN(have_altq);
4874                 CHECK_RBUFLEN(i);
4875                 bcopy(have_altq, dst, i * sizeof(uint32_t));
4876                 dst += i;
4877         }
4878         if (have_tag) {
4879                 i = F_LEN(have_tag);
4880                 CHECK_RBUFLEN(i);
4881                 bcopy(have_tag, dst, i * sizeof(uint32_t));
4882                 dst += i;
4883         }
4884
4885         /*
4886          * copy all other actions
4887          */
4888         for (src = (ipfw_insn *)actbuf; src != action; src += i) {
4889                 i = F_LEN(src);
4890                 CHECK_RBUFLEN(i);
4891                 bcopy(src, dst, i * sizeof(uint32_t));
4892                 dst += i;
4893         }
4894
4895         rule->cmd_len = (uint32_t *)dst - (uint32_t *)(rule->cmd);
4896         *rbufsize = (char *)dst - (char *)rule;
4897 }
4898
4899 static int
4900 compare_ntlv(const void *_a, const void *_b)
4901 {
4902         ipfw_obj_ntlv *a, *b;
4903
4904         a = (ipfw_obj_ntlv *)_a;
4905         b = (ipfw_obj_ntlv *)_b;
4906
4907         if (a->set < b->set)
4908                 return (-1);
4909         else if (a->set > b->set)
4910                 return (1);
4911
4912         if (a->idx < b->idx)
4913                 return (-1);
4914         else if (a->idx > b->idx)
4915                 return (1);
4916
4917         if (a->head.type < b->head.type)
4918                 return (-1);
4919         else if (a->head.type > b->head.type)
4920                 return (1);
4921
4922         return (0);
4923 }
4924
4925 /*
4926  * Provide kernel with sorted list of referenced objects
4927  */
4928 static void
4929 object_sort_ctlv(ipfw_obj_ctlv *ctlv)
4930 {
4931
4932         qsort(ctlv + 1, ctlv->count, ctlv->objsize, compare_ntlv);
4933 }
4934
4935 struct object_kt {
4936         uint16_t        uidx;
4937         uint16_t        type;
4938 };
4939 static int
4940 compare_object_kntlv(const void *k, const void *v)
4941 {
4942         ipfw_obj_ntlv *ntlv;
4943         struct object_kt key;
4944
4945         key = *((struct object_kt *)k);
4946         ntlv = (ipfw_obj_ntlv *)v;
4947
4948         if (key.uidx < ntlv->idx)
4949                 return (-1);
4950         else if (key.uidx > ntlv->idx)
4951                 return (1);
4952
4953         if (key.type < ntlv->head.type)
4954                 return (-1);
4955         else if (key.type > ntlv->head.type)
4956                 return (1);
4957
4958         return (0);
4959 }
4960
4961 /*
4962  * Finds object name in @ctlv by @idx and @type.
4963  * Uses the following facts:
4964  * 1) All TLVs are the same size
4965  * 2) Kernel implementation provides already sorted list.
4966  *
4967  * Returns table name or NULL.
4968  */
4969 static char *
4970 object_search_ctlv(ipfw_obj_ctlv *ctlv, uint16_t idx, uint16_t type)
4971 {
4972         ipfw_obj_ntlv *ntlv;
4973         struct object_kt key;
4974
4975         key.uidx = idx;
4976         key.type = type;
4977
4978         ntlv = bsearch(&key, (ctlv + 1), ctlv->count, ctlv->objsize,
4979             compare_object_kntlv);
4980
4981         if (ntlv != NULL)
4982                 return (ntlv->name);
4983
4984         return (NULL);
4985 }
4986
4987 static char *
4988 table_search_ctlv(ipfw_obj_ctlv *ctlv, uint16_t idx)
4989 {
4990
4991         return (object_search_ctlv(ctlv, idx, IPFW_TLV_TBL_NAME));
4992 }
4993
4994 /*
4995  * Adds one or more rules to ipfw chain.
4996  * Data layout:
4997  * Request:
4998  * [
4999  *   ip_fw3_opheader
5000  *   [ ipfw_obj_ctlv(IPFW_TLV_TBL_LIST) ipfw_obj_ntlv x N ] (optional *1)
5001  *   [ ipfw_obj_ctlv(IPFW_TLV_RULE_LIST) [ ip_fw_rule ip_fw_insn ] x N ] (*2) (*3)
5002  * ]
5003  * Reply:
5004  * [
5005  *   ip_fw3_opheader
5006  *   [ ipfw_obj_ctlv(IPFW_TLV_TBL_LIST) ipfw_obj_ntlv x N ] (optional)
5007  *   [ ipfw_obj_ctlv(IPFW_TLV_RULE_LIST) [ ip_fw_rule ip_fw_insn ] x N ]
5008  * ]
5009  *
5010  * Rules in reply are modified to store their actual ruleset number.
5011  *
5012  * (*1) TLVs inside IPFW_TLV_TBL_LIST needs to be sorted ascending
5013  * according to their idx field and there has to be no duplicates.
5014  * (*2) Numbered rules inside IPFW_TLV_RULE_LIST needs to be sorted ascending.
5015  * (*3) Each ip_fw structure needs to be aligned to u64 boundary.
5016  */
5017 void
5018 ipfw_add(char *av[])
5019 {
5020         uint32_t rulebuf[1024];
5021         int rbufsize, default_off, tlen, rlen;
5022         size_t sz;
5023         struct tidx ts;
5024         struct ip_fw_rule *rule;
5025         caddr_t tbuf;
5026         ip_fw3_opheader *op3;
5027         ipfw_obj_ctlv *ctlv, *tstate;
5028
5029         rbufsize = sizeof(rulebuf);
5030         memset(rulebuf, 0, rbufsize);
5031         memset(&ts, 0, sizeof(ts));
5032
5033         /* Optimize case with no tables */
5034         default_off = sizeof(ipfw_obj_ctlv) + sizeof(ip_fw3_opheader);
5035         op3 = (ip_fw3_opheader *)rulebuf;
5036         ctlv = (ipfw_obj_ctlv *)(op3 + 1);
5037         rule = (struct ip_fw_rule *)(ctlv + 1);
5038         rbufsize -= default_off;
5039
5040         compile_rule(av, (uint32_t *)rule, &rbufsize, &ts);
5041         /* Align rule size to u64 boundary */
5042         rlen = roundup2(rbufsize, sizeof(uint64_t));
5043
5044         tbuf = NULL;
5045         sz = 0;
5046         tstate = NULL;
5047         if (ts.count != 0) {
5048                 /* Some tables. We have to alloc more data */
5049                 tlen = ts.count * sizeof(ipfw_obj_ntlv);
5050                 sz = default_off + sizeof(ipfw_obj_ctlv) + tlen + rlen;
5051
5052                 if ((tbuf = calloc(1, sz)) == NULL)
5053                         err(EX_UNAVAILABLE, "malloc() failed for IP_FW_ADD");
5054                 op3 = (ip_fw3_opheader *)tbuf;
5055                 /* Tables first */
5056                 ctlv = (ipfw_obj_ctlv *)(op3 + 1);
5057                 ctlv->head.type = IPFW_TLV_TBLNAME_LIST;
5058                 ctlv->head.length = sizeof(ipfw_obj_ctlv) + tlen;
5059                 ctlv->count = ts.count;
5060                 ctlv->objsize = sizeof(ipfw_obj_ntlv);
5061                 memcpy(ctlv + 1, ts.idx, tlen);
5062                 object_sort_ctlv(ctlv);
5063                 tstate = ctlv;
5064                 /* Rule next */
5065                 ctlv = (ipfw_obj_ctlv *)((caddr_t)ctlv + ctlv->head.length);
5066                 ctlv->head.type = IPFW_TLV_RULE_LIST;
5067                 ctlv->head.length = sizeof(ipfw_obj_ctlv) + rlen;
5068                 ctlv->count = 1;
5069                 memcpy(ctlv + 1, rule, rbufsize);
5070         } else {
5071                 /* Simply add header */
5072                 sz = rlen + default_off;
5073                 memset(ctlv, 0, sizeof(*ctlv));
5074                 ctlv->head.type = IPFW_TLV_RULE_LIST;
5075                 ctlv->head.length = sizeof(ipfw_obj_ctlv) + rlen;
5076                 ctlv->count = 1;
5077         }
5078
5079         if (do_get3(IP_FW_XADD, op3, &sz) != 0)
5080                 err(EX_UNAVAILABLE, "getsockopt(%s)", "IP_FW_XADD");
5081
5082         if (!co.do_quiet) {
5083                 struct format_opts sfo;
5084                 struct buf_pr bp;
5085                 memset(&sfo, 0, sizeof(sfo));
5086                 sfo.tstate = tstate;
5087                 sfo.set_mask = (uint32_t)(-1);
5088                 bp_alloc(&bp, 4096);
5089                 show_static_rule(&co, &sfo, &bp, rule, NULL);
5090                 printf("%s", bp.buf);
5091                 bp_free(&bp);
5092         }
5093
5094         if (tbuf != NULL)
5095                 free(tbuf);
5096
5097         if (ts.idx != NULL)
5098                 free(ts.idx);
5099 }
5100
5101 /*
5102  * clear the counters or the log counters.
5103  * optname has the following values:
5104  *  0 (zero both counters and logging)
5105  *  1 (zero logging only)
5106  */
5107 void
5108 ipfw_zero(int ac, char *av[], int optname)
5109 {
5110         ipfw_range_tlv rt;
5111         uint32_t arg;
5112         int failed = EX_OK;
5113         char const *errstr;
5114         char const *name = optname ? "RESETLOG" : "ZERO";
5115
5116         optname = optname ? IP_FW_XRESETLOG : IP_FW_XZERO;
5117         memset(&rt, 0, sizeof(rt));
5118
5119         av++; ac--;
5120
5121         if (ac == 0) {
5122                 /* clear all entries */
5123                 rt.flags = IPFW_RCFLAG_ALL;
5124                 if (do_range_cmd(optname, &rt) < 0)
5125                         err(EX_UNAVAILABLE, "setsockopt(IP_FW_X%s)", name);
5126                 if (!co.do_quiet)
5127                         printf("%s.\n", optname == IP_FW_XZERO ?
5128                             "Accounting cleared":"Logging counts reset");
5129
5130                 return;
5131         }
5132
5133         while (ac) {
5134                 /* Rule number */
5135                 if (isdigit(**av)) {
5136                         arg = strtonum(*av, 0, 0xffff, &errstr);
5137                         if (errstr)
5138                                 errx(EX_DATAERR,
5139                                     "invalid rule number %s\n", *av);
5140                         rt.start_rule = arg;
5141                         rt.end_rule = arg;
5142                         rt.flags |= IPFW_RCFLAG_RANGE;
5143                         if (co.use_set != 0) {
5144                                 rt.set = co.use_set - 1;
5145                                 rt.flags |= IPFW_RCFLAG_SET;
5146                         }
5147                         if (do_range_cmd(optname, &rt) != 0) {
5148                                 warn("rule %u: setsockopt(IP_FW_X%s)",
5149                                     arg, name);
5150                                 failed = EX_UNAVAILABLE;
5151                         } else if (rt.new_set == 0) {
5152                                 printf("Entry %d not found\n", arg);
5153                                 failed = EX_UNAVAILABLE;
5154                         } else if (!co.do_quiet)
5155                                 printf("Entry %d %s.\n", arg,
5156                                     optname == IP_FW_XZERO ?
5157                                         "cleared" : "logging count reset");
5158                 } else {
5159                         errx(EX_USAGE, "invalid rule number ``%s''", *av);
5160                 }
5161                 av++; ac--;
5162         }
5163         if (failed != EX_OK)
5164                 exit(failed);
5165 }
5166
5167 void
5168 ipfw_flush(int force)
5169 {
5170         ipfw_range_tlv rt;
5171
5172         if (!force && !co.do_quiet) { /* need to ask user */
5173                 int c;
5174
5175                 printf("Are you sure? [yn] ");
5176                 fflush(stdout);
5177                 do {
5178                         c = toupper(getc(stdin));
5179                         while (c != '\n' && getc(stdin) != '\n')
5180                                 if (feof(stdin))
5181                                         return; /* and do not flush */
5182                 } while (c != 'Y' && c != 'N');
5183                 printf("\n");
5184                 if (c == 'N')   /* user said no */
5185                         return;
5186         }
5187         if (co.do_pipe) {
5188                 dummynet_flush();
5189                 return;
5190         }
5191         /* `ipfw set N flush` - is the same that `ipfw delete set N` */
5192         memset(&rt, 0, sizeof(rt));
5193         if (co.use_set != 0) {
5194                 rt.set = co.use_set - 1;
5195                 rt.flags = IPFW_RCFLAG_SET;
5196         } else
5197                 rt.flags = IPFW_RCFLAG_ALL;
5198         if (do_range_cmd(IP_FW_XDEL, &rt) != 0)
5199                         err(EX_UNAVAILABLE, "setsockopt(IP_FW_XDEL)");
5200         if (!co.do_quiet)
5201                 printf("Flushed all %s.\n", co.do_pipe ? "pipes" : "rules");
5202 }
5203
5204 static struct _s_x intcmds[] = {
5205       { "talist",       TOK_TALIST },
5206       { "iflist",       TOK_IFLIST },
5207       { "olist",        TOK_OLIST },
5208       { "vlist",        TOK_VLIST },
5209       { NULL, 0 }
5210 };
5211
5212 static struct _s_x otypes[] = {
5213         { "EACTION",    IPFW_TLV_EACTION },
5214         { "DYNSTATE",   IPFW_TLV_STATE_NAME },
5215         { NULL, 0 }
5216 };
5217
5218 static const char*
5219 lookup_eaction_name(ipfw_obj_ntlv *ntlv, int cnt, uint16_t type)
5220 {
5221         const char *name;
5222         int i;
5223
5224         name = NULL;
5225         for (i = 0; i < cnt; i++) {
5226                 if (ntlv[i].head.type != IPFW_TLV_EACTION)
5227                         continue;
5228                 if (IPFW_TLV_EACTION_NAME(ntlv[i].idx) != type)
5229                         continue;
5230                 name = ntlv[i].name;
5231                 break;
5232         }
5233         return (name);
5234 }
5235
5236 static void
5237 ipfw_list_objects(int ac, char *av[])
5238 {
5239         ipfw_obj_lheader req, *olh;
5240         ipfw_obj_ntlv *ntlv;
5241         const char *name;
5242         size_t sz;
5243         int i;
5244
5245         memset(&req, 0, sizeof(req));
5246         sz = sizeof(req);
5247         if (do_get3(IP_FW_DUMP_SRVOBJECTS, &req.opheader, &sz) != 0)
5248                 if (errno != ENOMEM)
5249                         return;
5250
5251         sz = req.size;
5252         if ((olh = calloc(1, sz)) == NULL)
5253                 return;
5254
5255         olh->size = sz;
5256         if (do_get3(IP_FW_DUMP_SRVOBJECTS, &olh->opheader, &sz) != 0) {
5257                 free(olh);
5258                 return;
5259         }
5260
5261         if (olh->count > 0)
5262                 printf("Objects list:\n");
5263         else
5264                 printf("There are no objects\n");
5265         ntlv = (ipfw_obj_ntlv *)(olh + 1);
5266         for (i = 0; i < olh->count; i++) {
5267                 name = match_value(otypes, ntlv->head.type);
5268                 if (name == NULL)
5269                         name = lookup_eaction_name(
5270                             (ipfw_obj_ntlv *)(olh + 1), olh->count,
5271                             ntlv->head.type);
5272                 if (name == NULL)
5273                         printf(" kidx: %4d\ttype: %10d\tname: %s\n",
5274                             ntlv->idx, ntlv->head.type, ntlv->name);
5275                 else
5276                         printf(" kidx: %4d\ttype: %10s\tname: %s\n",
5277                             ntlv->idx, name, ntlv->name);
5278                 ntlv++;
5279         }
5280         free(olh);
5281 }
5282
5283 void
5284 ipfw_internal_handler(int ac, char *av[])
5285 {
5286         int tcmd;
5287
5288         ac--; av++;
5289         NEED1("internal cmd required");
5290
5291         if ((tcmd = match_token(intcmds, *av)) == -1)
5292                 errx(EX_USAGE, "invalid internal sub-cmd: %s", *av);
5293
5294         switch (tcmd) {
5295         case TOK_IFLIST:
5296                 ipfw_list_tifaces();
5297                 break;
5298         case TOK_TALIST:
5299                 ipfw_list_ta(ac, av);
5300                 break;
5301         case TOK_OLIST:
5302                 ipfw_list_objects(ac, av);
5303                 break;
5304         case TOK_VLIST:
5305                 ipfw_list_values(ac, av);
5306                 break;
5307         }
5308 }
5309
5310 static int
5311 ipfw_get_tracked_ifaces(ipfw_obj_lheader **polh)
5312 {
5313         ipfw_obj_lheader req, *olh;
5314         size_t sz;
5315
5316         memset(&req, 0, sizeof(req));
5317         sz = sizeof(req);
5318
5319         if (do_get3(IP_FW_XIFLIST, &req.opheader, &sz) != 0) {
5320                 if (errno != ENOMEM)
5321                         return (errno);
5322         }
5323
5324         sz = req.size;
5325         if ((olh = calloc(1, sz)) == NULL)
5326                 return (ENOMEM);
5327
5328         olh->size = sz;
5329         if (do_get3(IP_FW_XIFLIST, &olh->opheader, &sz) != 0) {
5330                 free(olh);
5331                 return (errno);
5332         }
5333
5334         *polh = olh;
5335         return (0);
5336 }
5337
5338 static int
5339 ifinfo_cmp(const void *a, const void *b)
5340 {
5341         ipfw_iface_info *ia, *ib;
5342
5343         ia = (ipfw_iface_info *)a;
5344         ib = (ipfw_iface_info *)b;
5345
5346         return (stringnum_cmp(ia->ifname, ib->ifname));
5347 }
5348
5349 /*
5350  * Retrieves table list from kernel,
5351  * optionally sorts it and calls requested function for each table.
5352  * Returns 0 on success.
5353  */
5354 static void
5355 ipfw_list_tifaces()
5356 {
5357         ipfw_obj_lheader *olh;
5358         ipfw_iface_info *info;
5359         int i, error;
5360
5361         if ((error = ipfw_get_tracked_ifaces(&olh)) != 0)
5362                 err(EX_OSERR, "Unable to request ipfw tracked interface list");
5363
5364
5365         qsort(olh + 1, olh->count, olh->objsize, ifinfo_cmp);
5366
5367         info = (ipfw_iface_info *)(olh + 1);
5368         for (i = 0; i < olh->count; i++) {
5369                 if (info->flags & IPFW_IFFLAG_RESOLVED)
5370                         printf("%s ifindex: %d refcount: %u changes: %u\n",
5371                             info->ifname, info->ifindex, info->refcnt,
5372                             info->gencnt);
5373                 else
5374                         printf("%s ifindex: unresolved refcount: %u changes: %u\n",
5375                             info->ifname, info->refcnt, info->gencnt);
5376                 info = (ipfw_iface_info *)((caddr_t)info + olh->objsize);
5377         }
5378
5379         free(olh);
5380 }
5381
5382
5383
5384