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 <stdint.h>
  40 #include <stdlib.h>
  41 #include <string.h>
  42 #include <sysexits.h>
  43 #include <time.h>       /* ctime */
  44 #include <timeconv.h>   /* _long_to_time */
  45 #include <unistd.h>
  46 #include <fcntl.h>
  47 #include <stddef.h>     /* offsetof */
  48
  49 #include <net/ethernet.h>
  50 #include <net/if.h>             /* only IFNAMSIZ */
  51 #include <netinet/in.h>
  52 #include <netinet/in_systm.h>   /* only n_short, n_long */
  53 #include <netinet/ip.h>
  54 #include <netinet/ip_icmp.h>
  55 #include <netinet/ip_fw.h>
  56 #include <netinet/tcp.h>
  57 #include <arpa/inet.h>
  58
  59 struct cmdline_opts co; /* global options */
  60
  61 struct format_opts {
  62         int bcwidth;
  63         int pcwidth;
  64         int show_counters;
  65         int show_time;          /* show timestamp */
  66         uint32_t set_mask;      /* enabled sets mask */
  67         uint32_t flags;         /* request flags */
  68         uint32_t first;         /* first rule to request */
  69         uint32_t last;          /* last rule to request */
  70         uint32_t dcnt;          /* number of dynamic states */
  71         ipfw_obj_ctlv *tstate;  /* table state data */
  72 };
  73
  74 int resvd_set_number = RESVD_SET;
  75
  76 int ipfw_socket = -1;
  77
  78 #define CHECK_LENGTH(v, len) do {                               \
  79         if ((v) < (len))                                        \
  80                 errx(EX_DATAERR, "Rule too long");              \
  81         } while (0)
  82 /*
  83  * Check if we have enough space in cmd buffer. Note that since
  84  * first 8? u32 words are reserved by reserved header, full cmd
  85  * buffer can't be used, so we need to protect from buffer overrun
  86  * only. At the beginning, cblen is less than actual buffer size by
  87  * size of ipfw_insn_u32 instruction + 1 u32 work. This eliminates need
  88  * for checking small instructions fitting in given range.
  89  * We also (ab)use the fact that ipfw_insn is always the first field
  90  * for any custom instruction.
  91  */
  92 #define CHECK_CMDLEN    CHECK_LENGTH(cblen, F_LEN((ipfw_insn *)cmd))
  93
  94 #define GET_UINT_ARG(arg, min, max, tok, s_x) do {                      \
  95         if (!av[0])                                                     \
  96                 errx(EX_USAGE, "%s: missing argument", match_value(s_x, tok)); \
  97         if (_substrcmp(*av, "tablearg") == 0) {                         \
  98                 arg = IP_FW_TARG;                                       \
  99                 break;                                                  \
 100         }                                                               \
 101                                                                         \
 102         {                                                               \
 103         long _xval;                                                     \
 104         char *end;                                                      \
 105                                                                         \
 106         _xval = strtol(*av, &end, 10);                                  \
 107                                                                         \
 108         if (!isdigit(**av) || *end != '\0' || (_xval == 0 && errno == EINVAL)) \
 109                 errx(EX_DATAERR, "%s: invalid argument: %s",            \
 110                     match_value(s_x, tok), *av);                        \
 111                                                                         \
 112         if (errno == ERANGE || _xval < min || _xval > max)              \
 113                 errx(EX_DATAERR, "%s: argument is out of range (%u..%u): %s", \
 114                     match_value(s_x, tok), min, max, *av);              \
 115                                                                         \
 116         if (_xval == IP_FW_TARG)                                        \
 117                 errx(EX_DATAERR, "%s: illegal argument value: %s",      \
 118                     match_value(s_x, tok), *av);                        \
 119         arg = _xval;                                                    \
 120         }                                                               \
 121 } while (0)
 122
 123 static struct _s_x f_tcpflags[] = {
 124         { "syn", TH_SYN },
 125         { "fin", TH_FIN },
 126         { "ack", TH_ACK },
 127         { "psh", TH_PUSH },
 128         { "rst", TH_RST },
 129         { "urg", TH_URG },
 130         { "tcp flag", 0 },
 131         { NULL, 0 }
 132 };
 133
 134 static struct _s_x f_tcpopts[] = {
 135         { "mss",        IP_FW_TCPOPT_MSS },
 136         { "maxseg",     IP_FW_TCPOPT_MSS },
 137         { "window",     IP_FW_TCPOPT_WINDOW },
 138         { "sack",       IP_FW_TCPOPT_SACK },
 139         { "ts",         IP_FW_TCPOPT_TS },
 140         { "timestamp",  IP_FW_TCPOPT_TS },
 141         { "cc",         IP_FW_TCPOPT_CC },
 142         { "tcp option", 0 },
 143         { NULL, 0 }
 144 };
 145
 146 /*
 147  * IP options span the range 0 to 255 so we need to remap them
 148  * (though in fact only the low 5 bits are significant).
 149  */
 150 static struct _s_x f_ipopts[] = {
 151         { "ssrr",       IP_FW_IPOPT_SSRR},
 152         { "lsrr",       IP_FW_IPOPT_LSRR},
 153         { "rr",         IP_FW_IPOPT_RR},
 154         { "ts",         IP_FW_IPOPT_TS},
 155         { "ip option",  0 },
 156         { NULL, 0 }
 157 };
 158
 159 static struct _s_x f_iptos[] = {
 160         { "lowdelay",   IPTOS_LOWDELAY},
 161         { "throughput", IPTOS_THROUGHPUT},
 162         { "reliability", IPTOS_RELIABILITY},
 163         { "mincost",    IPTOS_MINCOST},
 164         { "congestion", IPTOS_ECN_CE},
 165         { "ecntransport", IPTOS_ECN_ECT0},
 166         { "ip tos option", 0},
 167         { NULL, 0 }
 168 };
 169
 170 struct _s_x f_ipdscp[] = {
 171         { "af11", IPTOS_DSCP_AF11 >> 2 },       /* 001010 */
 172         { "af12", IPTOS_DSCP_AF12 >> 2 },       /* 001100 */
 173         { "af13", IPTOS_DSCP_AF13 >> 2 },       /* 001110 */
 174         { "af21", IPTOS_DSCP_AF21 >> 2 },       /* 010010 */
 175         { "af22", IPTOS_DSCP_AF22 >> 2 },       /* 010100 */
 176         { "af23", IPTOS_DSCP_AF23 >> 2 },       /* 010110 */
 177         { "af31", IPTOS_DSCP_AF31 >> 2 },       /* 011010 */
 178         { "af32", IPTOS_DSCP_AF32 >> 2 },       /* 011100 */
 179         { "af33", IPTOS_DSCP_AF33 >> 2 },       /* 011110 */
 180         { "af41", IPTOS_DSCP_AF41 >> 2 },       /* 100010 */
 181         { "af42", IPTOS_DSCP_AF42 >> 2 },       /* 100100 */
 182         { "af43", IPTOS_DSCP_AF43 >> 2 },       /* 100110 */
 183         { "be", IPTOS_DSCP_CS0 >> 2 },  /* 000000 */
 184         { "ef", IPTOS_DSCP_EF >> 2 },   /* 101110 */
 185         { "cs0", IPTOS_DSCP_CS0 >> 2 }, /* 000000 */
 186         { "cs1", IPTOS_DSCP_CS1 >> 2 }, /* 001000 */
 187         { "cs2", IPTOS_DSCP_CS2 >> 2 }, /* 010000 */
 188         { "cs3", IPTOS_DSCP_CS3 >> 2 }, /* 011000 */
 189         { "cs4", IPTOS_DSCP_CS4 >> 2 }, /* 100000 */
 190         { "cs5", IPTOS_DSCP_CS5 >> 2 }, /* 101000 */
 191         { "cs6", IPTOS_DSCP_CS6 >> 2 }, /* 110000 */
 192         { "cs7", IPTOS_DSCP_CS7 >> 2 }, /* 100000 */
 193         { NULL, 0 }
 194 };
 195
 196 static struct _s_x limit_masks[] = {
 197         {"all",         DYN_SRC_ADDR|DYN_SRC_PORT|DYN_DST_ADDR|DYN_DST_PORT},
 198         {"src-addr",    DYN_SRC_ADDR},
 199         {"src-port",    DYN_SRC_PORT},
 200         {"dst-addr",    DYN_DST_ADDR},
 201         {"dst-port",    DYN_DST_PORT},
 202         {NULL,          0}
 203 };
 204
 205 /*
 206  * we use IPPROTO_ETHERTYPE as a fake protocol id to call the print routines
 207  * This is only used in this code.
 208  */
 209 #define IPPROTO_ETHERTYPE       0x1000
 210 static struct _s_x ether_types[] = {
 211     /*
 212      * Note, we cannot use "-:&/" in the names because they are field
 213      * separators in the type specifications. Also, we use s = NULL as
 214      * end-delimiter, because a type of 0 can be legal.
 215      */
 216         { "ip",         0x0800 },
 217         { "ipv4",       0x0800 },
 218         { "ipv6",       0x86dd },
 219         { "arp",        0x0806 },
 220         { "rarp",       0x8035 },
 221         { "vlan",       0x8100 },
 222         { "loop",       0x9000 },
 223         { "trail",      0x1000 },
 224         { "at",         0x809b },
 225         { "atalk",      0x809b },
 226         { "aarp",       0x80f3 },
 227         { "pppoe_disc", 0x8863 },
 228         { "pppoe_sess", 0x8864 },
 229         { "ipx_8022",   0x00E0 },
 230         { "ipx_8023",   0x0000 },
 231         { "ipx_ii",     0x8137 },
 232         { "ipx_snap",   0x8137 },
 233         { "ipx",        0x8137 },
 234         { "ns",         0x0600 },
 235         { NULL,         0 }
 236 };
 237
 238 static struct _s_x rule_eactions[] = {
 239         { "nat64lsn",           TOK_NAT64LSN },
 240         { "nat64stl",           TOK_NAT64STL },
 241         { "nptv6",              TOK_NPTV6 },
 242         { "tcp-setmss",         TOK_TCPSETMSS },
 243         { NULL, 0 }     /* terminator */
 244 };
 245
 246 static struct _s_x rule_actions[] = {
 247         { "abort6",             TOK_ABORT6 },
 248         { "abort",              TOK_ABORT },
 249         { "accept",             TOK_ACCEPT },
 250         { "pass",               TOK_ACCEPT },
 251         { "allow",              TOK_ACCEPT },
 252         { "permit",             TOK_ACCEPT },
 253         { "count",              TOK_COUNT },
 254         { "pipe",               TOK_PIPE },
 255         { "queue",              TOK_QUEUE },
 256         { "divert",             TOK_DIVERT },
 257         { "tee",                TOK_TEE },
 258         { "netgraph",           TOK_NETGRAPH },
 259         { "ngtee",              TOK_NGTEE },
 260         { "fwd",                TOK_FORWARD },
 261         { "forward",            TOK_FORWARD },
 262         { "skipto",             TOK_SKIPTO },
 263         { "deny",               TOK_DENY },
 264         { "drop",               TOK_DENY },
 265         { "reject",             TOK_REJECT },
 266         { "reset6",             TOK_RESET6 },
 267         { "reset",              TOK_RESET },
 268         { "unreach6",           TOK_UNREACH6 },
 269         { "unreach",            TOK_UNREACH },
 270         { "check-state",        TOK_CHECKSTATE },
 271         { "//",                 TOK_COMMENT },
 272         { "nat",                TOK_NAT },
 273         { "reass",              TOK_REASS },
 274         { "setfib",             TOK_SETFIB },
 275         { "setdscp",            TOK_SETDSCP },
 276         { "call",               TOK_CALL },
 277         { "return",             TOK_RETURN },
 278         { "eaction",            TOK_EACTION },
 279         { "tcp-setmss",         TOK_TCPSETMSS },
 280         { NULL, 0 }     /* terminator */
 281 };
 282
 283 static struct _s_x rule_action_params[] = {
 284         { "altq",               TOK_ALTQ },
 285         { "log",                TOK_LOG },
 286         { "tag",                TOK_TAG },
 287         { "untag",              TOK_UNTAG },
 288         { NULL, 0 }     /* terminator */
 289 };
 290
 291 /*
 292  * The 'lookup' instruction accepts one of the following arguments.
 293  * -1 is a terminator for the list.
 294  * Arguments are passed as v[1] in O_DST_LOOKUP options.
 295  */
 296 static int lookup_key[] = {
 297         TOK_DSTIP, TOK_SRCIP, TOK_DSTPORT, TOK_SRCPORT,
 298         TOK_UID, TOK_JAIL, TOK_DSCP, -1 };
 299
 300 static struct _s_x rule_options[] = {
 301         { "tagged",             TOK_TAGGED },
 302         { "uid",                TOK_UID },
 303         { "gid",                TOK_GID },
 304         { "jail",               TOK_JAIL },
 305         { "in",                 TOK_IN },
 306         { "limit",              TOK_LIMIT },
 307         { "keep-state",         TOK_KEEPSTATE },
 308         { "bridged",            TOK_LAYER2 },
 309         { "layer2",             TOK_LAYER2 },
 310         { "out",                TOK_OUT },
 311         { "diverted",           TOK_DIVERTED },
 312         { "diverted-loopback",  TOK_DIVERTEDLOOPBACK },
 313         { "diverted-output",    TOK_DIVERTEDOUTPUT },
 314         { "xmit",               TOK_XMIT },
 315         { "recv",               TOK_RECV },
 316         { "via",                TOK_VIA },
 317         { "fragment",           TOK_FRAG },
 318         { "frag",               TOK_FRAG },
 319         { "fib",                TOK_FIB },
 320         { "ipoptions",          TOK_IPOPTS },
 321         { "ipopts",             TOK_IPOPTS },
 322         { "iplen",              TOK_IPLEN },
 323         { "ipid",               TOK_IPID },
 324         { "ipprecedence",       TOK_IPPRECEDENCE },
 325         { "dscp",               TOK_DSCP },
 326         { "iptos",              TOK_IPTOS },
 327         { "ipttl",              TOK_IPTTL },
 328         { "ipversion",          TOK_IPVER },
 329         { "ipver",              TOK_IPVER },
 330         { "estab",              TOK_ESTAB },
 331         { "established",        TOK_ESTAB },
 332         { "setup",              TOK_SETUP },
 333         { "sockarg",            TOK_SOCKARG },
 334         { "tcpdatalen",         TOK_TCPDATALEN },
 335         { "tcpflags",           TOK_TCPFLAGS },
 336         { "tcpflgs",            TOK_TCPFLAGS },
 337         { "tcpoptions",         TOK_TCPOPTS },
 338         { "tcpopts",            TOK_TCPOPTS },
 339         { "tcpseq",             TOK_TCPSEQ },
 340         { "tcpack",             TOK_TCPACK },
 341         { "tcpwin",             TOK_TCPWIN },
 342         { "icmptype",           TOK_ICMPTYPES },
 343         { "icmptypes",          TOK_ICMPTYPES },
 344         { "dst-ip",             TOK_DSTIP },
 345         { "src-ip",             TOK_SRCIP },
 346         { "dst-port",           TOK_DSTPORT },
 347         { "src-port",           TOK_SRCPORT },
 348         { "proto",              TOK_PROTO },
 349         { "MAC",                TOK_MAC },
 350         { "mac",                TOK_MAC },
 351         { "mac-type",           TOK_MACTYPE },
 352         { "verrevpath",         TOK_VERREVPATH },
 353         { "versrcreach",        TOK_VERSRCREACH },
 354         { "antispoof",          TOK_ANTISPOOF },
 355         { "ipsec",              TOK_IPSEC },
 356         { "icmp6type",          TOK_ICMP6TYPES },
 357         { "icmp6types",         TOK_ICMP6TYPES },
 358         { "ext6hdr",            TOK_EXT6HDR},
 359         { "flow-id",            TOK_FLOWID},
 360         { "ipv6",               TOK_IPV6},
 361         { "ip6",                TOK_IPV6},
 362         { "ipv4",               TOK_IPV4},
 363         { "ip4",                TOK_IPV4},
 364         { "dst-ipv6",           TOK_DSTIP6},
 365         { "dst-ip6",            TOK_DSTIP6},
 366         { "src-ipv6",           TOK_SRCIP6},
 367         { "src-ip6",            TOK_SRCIP6},
 368         { "lookup",             TOK_LOOKUP},
 369         { "flow",               TOK_FLOW},
 370         { "//",                 TOK_COMMENT },
 371
 372         { "not",                TOK_NOT },              /* pseudo option */
 373         { "!", /* escape ? */   TOK_NOT },              /* pseudo option */
 374         { "or",                 TOK_OR },               /* pseudo option */
 375         { "|", /* escape */     TOK_OR },               /* pseudo option */
 376         { "{",                  TOK_STARTBRACE },       /* pseudo option */
 377         { "(",                  TOK_STARTBRACE },       /* pseudo option */
 378         { "}",                  TOK_ENDBRACE },         /* pseudo option */
 379         { ")",                  TOK_ENDBRACE },         /* pseudo option */
 380         { NULL, 0 }     /* terminator */
 381 };
 382
 383 void bprint_uint_arg(struct buf_pr *bp, const char *str, uint32_t arg);
 384 static int ipfw_get_config(struct cmdline_opts *co, struct format_opts *fo,
 385     ipfw_cfg_lheader **pcfg, size_t *psize);
 386 static int ipfw_show_config(struct cmdline_opts *co, struct format_opts *fo,
 387     ipfw_cfg_lheader *cfg, size_t sz, int ac, char **av);
 388 static void ipfw_list_tifaces(void);
 389
 390 struct tidx;
 391 static uint16_t pack_object(struct tidx *tstate, char *name, int otype);
 392 static uint16_t pack_table(struct tidx *tstate, char *name);
 393
 394 static char *table_search_ctlv(ipfw_obj_ctlv *ctlv, uint16_t idx);
 395 static void object_sort_ctlv(ipfw_obj_ctlv *ctlv);
 396 static char *object_search_ctlv(ipfw_obj_ctlv *ctlv, uint16_t idx,
 397     uint16_t type);
 398
 399 /*
 400  * Simple string buffer API.
 401  * Used to simplify buffer passing between function and for
 402  * transparent overrun handling.
 403  */
 404
 405 /*
 406  * Allocates new buffer of given size @sz.
 407  *
 408  * Returns 0 on success.
 409  */
 410 int
 411 bp_alloc(struct buf_pr *b, size_t size)
 412 {
 413         memset(b, 0, sizeof(struct buf_pr));
 414
 415         if ((b->buf = calloc(1, size)) == NULL)
 416                 return (ENOMEM);
 417
 418         b->ptr = b->buf;
 419         b->size = size;
 420         b->avail = b->size;
 421
 422         return (0);
 423 }
 424
 425 void
 426 bp_free(struct buf_pr *b)
 427 {
 428
 429         free(b->buf);
 430 }
 431
 432 /*
 433  * Flushes buffer so new writer start from beginning.
 434  */
 435 void
 436 bp_flush(struct buf_pr *b)
 437 {
 438
 439         b->ptr = b->buf;
 440         b->avail = b->size;
 441         b->buf[0] = '\0';
 442 }
 443
 444 /*
 445  * Print message specified by @format and args.
 446  * Automatically manage buffer space and transparently handle
 447  * buffer overruns.
 448  *
 449  * Returns number of bytes that should have been printed.
 450  */
 451 int
 452 bprintf(struct buf_pr *b, char *format, ...)
 453 {
 454         va_list args;
 455         int i;
 456
 457         va_start(args, format);
 458
 459         i = vsnprintf(b->ptr, b->avail, format, args);
 460         va_end(args);
 461
 462         if (i > b->avail || i < 0) {
 463                 /* Overflow or print error */
 464                 b->avail = 0;
 465         } else {
 466                 b->ptr += i;
 467                 b->avail -= i;
 468         }
 469
 470         b->needed += i;
 471
 472         return (i);
 473 }
 474
 475 /*
 476  * Special values printer for tablearg-aware opcodes.
 477  */
 478 void
 479 bprint_uint_arg(struct buf_pr *bp, const char *str, uint32_t arg)
 480 {
 481
 482         if (str != NULL)
 483                 bprintf(bp, "%s", str);
 484         if (arg == IP_FW_TARG)
 485                 bprintf(bp, "tablearg");
 486         else
 487                 bprintf(bp, "%u", arg);
 488 }
 489
 490 /*
 491  * Helper routine to print a possibly unaligned uint64_t on
 492  * various platform. If width > 0, print the value with
 493  * the desired width, followed by a space;
 494  * otherwise, return the required width.
 495  */
 496 int
 497 pr_u64(struct buf_pr *b, uint64_t *pd, int width)
 498 {
 499 #ifdef TCC
 500 #define U64_FMT "I64"
 501 #else
 502 #define U64_FMT "llu"
 503 #endif
 504         uint64_t u;
 505         unsigned long long d;
 506
 507         bcopy (pd, &u, sizeof(u));
 508         d = u;
 509         return (width > 0) ?
 510                 bprintf(b, "%*" U64_FMT " ", width, d) :
 511                 snprintf(NULL, 0, "%" U64_FMT, d) ;
 512 #undef U64_FMT
 513 }
 514
 515
 516 void *
 517 safe_calloc(size_t number, size_t size)
 518 {
 519         void *ret = calloc(number, size);
 520
 521         if (ret == NULL)
 522                 err(EX_OSERR, "calloc");
 523         return ret;
 524 }
 525
 526 void *
 527 safe_realloc(void *ptr, size_t size)
 528 {
 529         void *ret = realloc(ptr, size);
 530
 531         if (ret == NULL)
 532                 err(EX_OSERR, "realloc");
 533         return ret;
 534 }
 535
 536 /*
 537  * Compare things like interface or table names.
 538  */
 539 int
 540 stringnum_cmp(const char *a, const char *b)
 541 {
 542         int la, lb;
 543
 544         la = strlen(a);
 545         lb = strlen(b);
 546
 547         if (la > lb)
 548                 return (1);
 549         else if (la < lb)
 550                 return (-01);
 551
 552         return (strcmp(a, b));
 553 }
 554
 555
 556 /*
 557  * conditionally runs the command.
 558  * Selected options or negative -> getsockopt
 559  */
 560 int
 561 do_cmd(int optname, void *optval, uintptr_t optlen)
 562 {
 563         int i;
 564
 565         if (co.test_only)
 566                 return 0;
 567
 568         if (ipfw_socket == -1)
 569                 ipfw_socket = socket(AF_INET, SOCK_RAW, IPPROTO_RAW);
 570         if (ipfw_socket < 0)
 571                 err(EX_UNAVAILABLE, "socket");
 572
 573         if (optname == IP_FW_GET || optname == IP_DUMMYNET_GET ||
 574             optname == IP_FW_ADD || optname == IP_FW3 ||
 575             optname == IP_FW_NAT_GET_CONFIG ||
 576             optname < 0 ||
 577             optname == IP_FW_NAT_GET_LOG) {
 578                 if (optname < 0)
 579                         optname = -optname;
 580                 i = getsockopt(ipfw_socket, IPPROTO_IP, optname, optval,
 581                         (socklen_t *)optlen);
 582         } else {
 583                 i = setsockopt(ipfw_socket, IPPROTO_IP, optname, optval, optlen);
 584         }
 585         return i;
 586 }
 587
 588 /*
 589  * do_set3 - pass ipfw control cmd to kernel
 590  * @optname: option name
 591  * @optval: pointer to option data
 592  * @optlen: option length
 593  *
 594  * Assumes op3 header is already embedded.
 595  * Calls setsockopt() with IP_FW3 as kernel-visible opcode.
 596  * Returns 0 on success or errno otherwise.
 597  */
 598 int
 599 do_set3(int optname, ip_fw3_opheader *op3, size_t optlen)
 600 {
 601
 602         if (co.test_only)
 603                 return (0);
 604
 605         if (ipfw_socket == -1)
 606                 ipfw_socket = socket(AF_INET, SOCK_RAW, IPPROTO_RAW);
 607         if (ipfw_socket < 0)
 608                 err(EX_UNAVAILABLE, "socket");
 609
 610         op3->opcode = optname;
 611
 612         return (setsockopt(ipfw_socket, IPPROTO_IP, IP_FW3, op3, optlen));
 613 }
 614
 615 /*
 616  * do_get3 - pass ipfw control cmd to kernel
 617  * @optname: option name
 618  * @optval: pointer to option data
 619  * @optlen: pointer to option length
 620  *
 621  * Assumes op3 header is already embedded.
 622  * Calls getsockopt() with IP_FW3 as kernel-visible opcode.
 623  * Returns 0 on success or errno otherwise.
 624  */
 625 int
 626 do_get3(int optname, ip_fw3_opheader *op3, size_t *optlen)
 627 {
 628         int error;
 629         socklen_t len;
 630
 631         if (co.test_only)
 632                 return (0);
 633
 634         if (ipfw_socket == -1)
 635                 ipfw_socket = socket(AF_INET, SOCK_RAW, IPPROTO_RAW);
 636         if (ipfw_socket < 0)
 637                 err(EX_UNAVAILABLE, "socket");
 638
 639         op3->opcode = optname;
 640
 641         len = *optlen;
 642         error = getsockopt(ipfw_socket, IPPROTO_IP, IP_FW3, op3, &len);
 643         *optlen = len;
 644
 645         return (error);
 646 }
 647
 648 /**
 649  * match_token takes a table and a string, returns the value associated
 650  * with the string (-1 in case of failure).
 651  */
 652 int
 653 match_token(struct _s_x *table, const char *string)
 654 {
 655         struct _s_x *pt;
 656         uint i = strlen(string);
 657
 658         for (pt = table ; i && pt->s != NULL ; pt++)
 659                 if (strlen(pt->s) == i && !bcmp(string, pt->s, i))
 660                         return pt->x;
 661         return (-1);
 662 }
 663
 664 /**
 665  * match_token_relaxed takes a table and a string, returns the value associated
 666  * with the string for the best match.
 667  *
 668  * Returns:
 669  * value from @table for matched records
 670  * -1 for non-matched records
 671  * -2 if more than one records match @string.
 672  */
 673 int
 674 match_token_relaxed(struct _s_x *table, const char *string)
 675 {
 676         struct _s_x *pt, *m;
 677         int i, c;
 678
 679         i = strlen(string);
 680         c = 0;
 681
 682         for (pt = table ; i != 0 && pt->s != NULL ; pt++) {
 683                 if (strncmp(pt->s, string, i) != 0)
 684                         continue;
 685                 m = pt;
 686                 c++;
 687         }
 688
 689         if (c == 1)
 690                 return (m->x);
 691
 692         return (c > 0 ? -2: -1);
 693 }
 694
 695 int
 696 get_token(struct _s_x *table, const char *string, const char *errbase)
 697 {
 698         int tcmd;
 699
 700         if ((tcmd = match_token_relaxed(table, string)) < 0)
 701                 errx(EX_USAGE, "%s %s %s",
 702                     (tcmd == 0) ? "invalid" : "ambiguous", errbase, string);
 703
 704         return (tcmd);
 705 }
 706
 707 /**
 708  * match_value takes a table and a value, returns the string associated
 709  * with the value (NULL in case of failure).
 710  */
 711 char const *
 712 match_value(struct _s_x *p, int value)
 713 {
 714         for (; p->s != NULL; p++)
 715                 if (p->x == value)
 716                         return p->s;
 717         return NULL;
 718 }
 719
 720 size_t
 721 concat_tokens(char *buf, size_t bufsize, struct _s_x *table, char *delimiter)
 722 {
 723         struct _s_x *pt;
 724         int l;
 725         size_t sz;
 726
 727         for (sz = 0, pt = table ; pt->s != NULL; pt++) {
 728                 l = snprintf(buf + sz, bufsize - sz, "%s%s",
 729                     (sz == 0) ? "" : delimiter, pt->s);
 730                 sz += l;
 731                 bufsize += l;
 732                 if (sz > bufsize)
 733                         return (bufsize);
 734         }
 735
 736         return (sz);
 737 }
 738
 739 /*
 740  * helper function to process a set of flags and set bits in the
 741  * appropriate masks.
 742  */
 743 int
 744 fill_flags(struct _s_x *flags, char *p, char **e, uint32_t *set,
 745     uint32_t *clear)
 746 {
 747         char *q;        /* points to the separator */
 748         int val;
 749         uint32_t *which;        /* mask we are working on */
 750
 751         while (p && *p) {
 752                 if (*p == '!') {
 753                         p++;
 754                         which = clear;
 755                 } else
 756                         which = set;
 757                 q = strchr(p, ',');
 758                 if (q)
 759                         *q++ = '\0';
 760                 val = match_token(flags, p);
 761                 if (val <= 0) {
 762                         if (e != NULL)
 763                                 *e = p;
 764                         return (-1);
 765                 }
 766                 *which |= (uint32_t)val;
 767                 p = q;
 768         }
 769         return (0);
 770 }
 771
 772 void
 773 print_flags_buffer(char *buf, size_t sz, struct _s_x *list, uint32_t set)
 774 {
 775         char const *comma = "";
 776         int i, l;
 777
 778         for (i = 0; list[i].x != 0; i++) {
 779                 if ((set & list[i].x) == 0)
 780                         continue;
 781
 782                 set &= ~list[i].x;
 783                 l = snprintf(buf, sz, "%s%s", comma, list[i].s);
 784                 if (l >= sz)
 785                         return;
 786                 comma = ",";
 787                 buf += l;
 788                 sz -=l;
 789         }
 790 }
 791
 792 /*
 793  * _substrcmp takes two strings and returns 1 if they do not match,
 794  * and 0 if they match exactly or the first string is a sub-string
 795  * of the second.  A warning is printed to stderr in the case that the
 796  * first string is a sub-string of the second.
 797  *
 798  * This function will be removed in the future through the usual
 799  * deprecation process.
 800  */
 801 int
 802 _substrcmp(const char *str1, const char* str2)
 803 {
 804
 805         if (strncmp(str1, str2, strlen(str1)) != 0)
 806                 return 1;
 807
 808         if (strlen(str1) != strlen(str2))
 809                 warnx("DEPRECATED: '%s' matched '%s' as a sub-string",
 810                     str1, str2);
 811         return 0;
 812 }
 813
 814 /*
 815  * _substrcmp2 takes three strings and returns 1 if the first two do not match,
 816  * and 0 if they match exactly or the second string is a sub-string
 817  * of the first.  A warning is printed to stderr in the case that the
 818  * first string does not match the third.
 819  *
 820  * This function exists to warn about the bizarre construction
 821  * strncmp(str, "by", 2) which is used to allow people to use a shortcut
 822  * for "bytes".  The problem is that in addition to accepting "by",
 823  * "byt", "byte", and "bytes", it also excepts "by_rabid_dogs" and any
 824  * other string beginning with "by".
 825  *
 826  * This function will be removed in the future through the usual
 827  * deprecation process.
 828  */
 829 int
 830 _substrcmp2(const char *str1, const char* str2, const char* str3)
 831 {
 832
 833         if (strncmp(str1, str2, strlen(str2)) != 0)
 834                 return 1;
 835
 836         if (strcmp(str1, str3) != 0)
 837                 warnx("DEPRECATED: '%s' matched '%s'",
 838                     str1, str3);
 839         return 0;
 840 }
 841
 842 /*
 843  * prints one port, symbolic or numeric
 844  */
 845 static void
 846 print_port(struct buf_pr *bp, int proto, uint16_t port)
 847 {
 848
 849         if (proto == IPPROTO_ETHERTYPE) {
 850                 char const *s;
 851
 852                 if (co.do_resolv && (s = match_value(ether_types, port)) )
 853                         bprintf(bp, "%s", s);
 854                 else
 855                         bprintf(bp, "0x%04x", port);
 856         } else {
 857                 struct servent *se = NULL;
 858                 if (co.do_resolv) {
 859                         struct protoent *pe = getprotobynumber(proto);
 860
 861                         se = getservbyport(htons(port), pe ? pe->p_name : NULL);
 862                 }
 863                 if (se)
 864                         bprintf(bp, "%s", se->s_name);
 865                 else
 866                         bprintf(bp, "%d", port);
 867         }
 868 }
 869
 870 static struct _s_x _port_name[] = {
 871         {"dst-port",    O_IP_DSTPORT},
 872         {"src-port",    O_IP_SRCPORT},
 873         {"ipid",        O_IPID},
 874         {"iplen",       O_IPLEN},
 875         {"ipttl",       O_IPTTL},
 876         {"mac-type",    O_MAC_TYPE},
 877         {"tcpdatalen",  O_TCPDATALEN},
 878         {"tcpwin",      O_TCPWIN},
 879         {"tagged",      O_TAGGED},
 880         {NULL,          0}
 881 };
 882
 883 /*
 884  * Print the values in a list 16-bit items of the types above.
 885  * XXX todo: add support for mask.
 886  */
 887 static void
 888 print_newports(struct buf_pr *bp, ipfw_insn_u16 *cmd, int proto, int opcode)
 889 {
 890         uint16_t *p = cmd->ports;
 891         int i;
 892         char const *sep;
 893
 894         if (opcode != 0) {
 895                 sep = match_value(_port_name, opcode);
 896                 if (sep == NULL)
 897                         sep = "???";
 898                 bprintf(bp, " %s", sep);
 899         }
 900         sep = " ";
 901         for (i = F_LEN((ipfw_insn *)cmd) - 1; i > 0; i--, p += 2) {
 902                 bprintf(bp, "%s", sep);
 903                 print_port(bp, proto, p[0]);
 904                 if (p[0] != p[1]) {
 905                         bprintf(bp, "-");
 906                         print_port(bp, proto, p[1]);
 907                 }
 908                 sep = ",";
 909         }
 910 }
 911
 912 /*
 913  * Like strtol, but also translates service names into port numbers
 914  * for some protocols.
 915  * In particular:
 916  *      proto == -1 disables the protocol check;
 917  *      proto == IPPROTO_ETHERTYPE looks up an internal table
 918  *      proto == <some value in /etc/protocols> matches the values there.
 919  * Returns *end == s in case the parameter is not found.
 920  */
 921 static int
 922 strtoport(char *s, char **end, int base, int proto)
 923 {
 924         char *p, *buf;
 925         char *s1;
 926         int i;
 927
 928         *end = s;               /* default - not found */
 929         if (*s == '\0')
 930                 return 0;       /* not found */
 931
 932         if (isdigit(*s))
 933                 return strtol(s, end, base);
 934
 935         /*
 936          * find separator. '\\' escapes the next char.
 937          */
 938         for (s1 = s; *s1 && (isalnum(*s1) || *s1 == '\\') ; s1++)
 939                 if (*s1 == '\\' && s1[1] != '\0')
 940                         s1++;
 941
 942         buf = safe_calloc(s1 - s + 1, 1);
 943
 944         /*
 945          * copy into a buffer skipping backslashes
 946          */
 947         for (p = s, i = 0; p != s1 ; p++)
 948                 if (*p != '\\')
 949                         buf[i++] = *p;
 950         buf[i++] = '\0';
 951
 952         if (proto == IPPROTO_ETHERTYPE) {
 953                 i = match_token(ether_types, buf);
 954                 free(buf);
 955                 if (i != -1) {  /* found */
 956                         *end = s1;
 957                         return i;
 958                 }
 959         } else {
 960                 struct protoent *pe = NULL;
 961                 struct servent *se;
 962
 963                 if (proto != 0)
 964                         pe = getprotobynumber(proto);
 965                 setservent(1);
 966                 se = getservbyname(buf, pe ? pe->p_name : NULL);
 967                 free(buf);
 968                 if (se != NULL) {
 969                         *end = s1;
 970                         return ntohs(se->s_port);
 971                 }
 972         }
 973         return 0;       /* not found */
 974 }
 975
 976 /*
 977  * Fill the body of the command with the list of port ranges.
 978  */
 979 static int
 980 fill_newports(ipfw_insn_u16 *cmd, char *av, int proto, int cblen)
 981 {
 982         uint16_t a, b, *p = cmd->ports;
 983         int i = 0;
 984         char *s = av;
 985
 986         while (*s) {
 987                 a = strtoport(av, &s, 0, proto);
 988                 if (s == av)                    /* empty or invalid argument */
 989                         return (0);
 990
 991                 CHECK_LENGTH(cblen, i + 2);
 992
 993                 switch (*s) {
 994                 case '-':                       /* a range */
 995                         av = s + 1;
 996                         b = strtoport(av, &s, 0, proto);
 997                         /* Reject expressions like '1-abc' or '1-2-3'. */
 998                         if (s == av || (*s != ',' && *s != '\0'))
 999                                 return (0);
1000                         p[0] = a;
1001                         p[1] = b;
1002                         break;
1003                 case ',':                       /* comma separated list */
1004                 case '\0':
1005                         p[0] = p[1] = a;
1006                         break;
1007                 default:
1008                         warnx("port list: invalid separator <%c> in <%s>",
1009                                 *s, av);
1010                         return (0);
1011                 }
1012
1013                 i++;
1014                 p += 2;
1015                 av = s + 1;
1016         }
1017         if (i > 0) {
1018                 if (i + 1 > F_LEN_MASK)
1019                         errx(EX_DATAERR, "too many ports/ranges\n");
1020                 cmd->o.len |= i + 1;    /* leave F_NOT and F_OR untouched */
1021         }
1022         return (i);
1023 }
1024
1025 /*
1026  * Fill the body of the command with the list of DiffServ codepoints.
1027  */
1028 static void
1029 fill_dscp(ipfw_insn *cmd, char *av, int cblen)
1030 {
1031         uint32_t *low, *high;
1032         char *s = av, *a;
1033         int code;
1034
1035         cmd->opcode = O_DSCP;
1036         cmd->len |= F_INSN_SIZE(ipfw_insn_u32) + 1;
1037
1038         CHECK_CMDLEN;
1039
1040         low = (uint32_t *)(cmd + 1);
1041         high = low + 1;
1042
1043         *low = 0;
1044         *high = 0;
1045
1046         while (s != NULL) {
1047                 a = strchr(s, ',');
1048
1049                 if (a != NULL)
1050                         *a++ = '\0';
1051
1052                 if (isalpha(*s)) {
1053                         if ((code = match_token(f_ipdscp, s)) == -1)
1054                                 errx(EX_DATAERR, "Unknown DSCP code");
1055                 } else {
1056                         code = strtoul(s, NULL, 10);
1057                         if (code < 0 || code > 63)
1058                                 errx(EX_DATAERR, "Invalid DSCP value");
1059                 }
1060
1061                 if (code >= 32)
1062                         *high |= 1 << (code - 32);
1063                 else
1064                         *low |= 1 << code;
1065
1066                 s = a;
1067         }
1068 }
1069
1070 static struct _s_x icmpcodes[] = {
1071       { "net",                  ICMP_UNREACH_NET },
1072       { "host",                 ICMP_UNREACH_HOST },
1073       { "protocol",             ICMP_UNREACH_PROTOCOL },
1074       { "port",                 ICMP_UNREACH_PORT },
1075       { "needfrag",             ICMP_UNREACH_NEEDFRAG },
1076       { "srcfail",              ICMP_UNREACH_SRCFAIL },
1077       { "net-unknown",          ICMP_UNREACH_NET_UNKNOWN },
1078       { "host-unknown",         ICMP_UNREACH_HOST_UNKNOWN },
1079       { "isolated",             ICMP_UNREACH_ISOLATED },
1080       { "net-prohib",           ICMP_UNREACH_NET_PROHIB },
1081       { "host-prohib",          ICMP_UNREACH_HOST_PROHIB },
1082       { "tosnet",               ICMP_UNREACH_TOSNET },
1083       { "toshost",              ICMP_UNREACH_TOSHOST },
1084       { "filter-prohib",        ICMP_UNREACH_FILTER_PROHIB },
1085       { "host-precedence",      ICMP_UNREACH_HOST_PRECEDENCE },
1086       { "precedence-cutoff",    ICMP_UNREACH_PRECEDENCE_CUTOFF },
1087       { NULL, 0 }
1088 };
1089
1090 static void
1091 fill_reject_code(u_short *codep, char *str)
1092 {
1093         int val;
1094         char *s;
1095
1096         val = strtoul(str, &s, 0);
1097         if (s == str || *s != '\0' || val >= 0x100)
1098                 val = match_token(icmpcodes, str);
1099         if (val < 0)
1100                 errx(EX_DATAERR, "unknown ICMP unreachable code ``%s''", str);
1101         *codep = val;
1102         return;
1103 }
1104
1105 static void
1106 print_reject_code(struct buf_pr *bp, uint16_t code)
1107 {
1108         char const *s;
1109
1110         if ((s = match_value(icmpcodes, code)) != NULL)
1111                 bprintf(bp, "unreach %s", s);
1112         else
1113                 bprintf(bp, "unreach %u", code);
1114 }
1115
1116 /*
1117  * Returns the number of bits set (from left) in a contiguous bitmask,
1118  * or -1 if the mask is not contiguous.
1119  * XXX this needs a proper fix.
1120  * This effectively works on masks in big-endian (network) format.
1121  * when compiled on little endian architectures.
1122  *
1123  * First bit is bit 7 of the first byte -- note, for MAC addresses,
1124  * the first bit on the wire is bit 0 of the first byte.
1125  * len is the max length in bits.
1126  */
1127 int
1128 contigmask(uint8_t *p, int len)
1129 {
1130         int i, n;
1131
1132         for (i=0; i<len ; i++)
1133                 if ( (p[i/8] & (1 << (7 - (i%8)))) == 0) /* first bit unset */
1134                         break;
1135         for (n=i+1; n < len; n++)
1136                 if ( (p[n/8] & (1 << (7 - (n%8)))) != 0)
1137                         return -1; /* mask not contiguous */
1138         return i;
1139 }
1140
1141 /*
1142  * print flags set/clear in the two bitmasks passed as parameters.
1143  * There is a specialized check for f_tcpflags.
1144  */
1145 static void
1146 print_flags(struct buf_pr *bp, char const *name, ipfw_insn *cmd,
1147     struct _s_x *list)
1148 {
1149         char const *comma = "";
1150         int i;
1151         uint8_t set = cmd->arg1 & 0xff;
1152         uint8_t clear = (cmd->arg1 >> 8) & 0xff;
1153
1154         if (list == f_tcpflags && set == TH_SYN && clear == TH_ACK) {
1155                 bprintf(bp, " setup");
1156                 return;
1157         }
1158
1159         bprintf(bp, " %s ", name);
1160         for (i=0; list[i].x != 0; i++) {
1161                 if (set & list[i].x) {
1162                         set &= ~list[i].x;
1163                         bprintf(bp, "%s%s", comma, list[i].s);
1164                         comma = ",";
1165                 }
1166                 if (clear & list[i].x) {
1167                         clear &= ~list[i].x;
1168                         bprintf(bp, "%s!%s", comma, list[i].s);
1169                         comma = ",";
1170                 }
1171         }
1172 }
1173
1174
1175 /*
1176  * Print the ip address contained in a command.
1177  */
1178 static void
1179 print_ip(struct buf_pr *bp, struct format_opts *fo, ipfw_insn_ip *cmd,
1180     char const *s)
1181 {
1182         struct hostent *he = NULL;
1183         struct in_addr *ia;
1184         uint32_t len = F_LEN((ipfw_insn *)cmd);
1185         uint32_t *a = ((ipfw_insn_u32 *)cmd)->d;
1186         char *t;
1187
1188         if (cmd->o.opcode == O_IP_DST_LOOKUP && len > F_INSN_SIZE(ipfw_insn_u32)) {
1189                 uint32_t d = a[1];
1190                 const char *arg = "<invalid>";
1191
1192                 if (d < sizeof(lookup_key)/sizeof(lookup_key[0]))
1193                         arg = match_value(rule_options, lookup_key[d]);
1194                 t = table_search_ctlv(fo->tstate, ((ipfw_insn *)cmd)->arg1);
1195                 bprintf(bp, "%s lookup %s %s", cmd->o.len & F_NOT ? " not": "",
1196                         arg, t);
1197                 return;
1198         }
1199         bprintf(bp, "%s%s ", cmd->o.len & F_NOT ? " not": "", s);
1200
1201         if (cmd->o.opcode == O_IP_SRC_ME || cmd->o.opcode == O_IP_DST_ME) {
1202                 bprintf(bp, "me");
1203                 return;
1204         }
1205         if (cmd->o.opcode == O_IP_SRC_LOOKUP ||
1206             cmd->o.opcode == O_IP_DST_LOOKUP) {
1207                 t = table_search_ctlv(fo->tstate, ((ipfw_insn *)cmd)->arg1);
1208                 bprintf(bp, "table(%s", t);
1209                 if (len == F_INSN_SIZE(ipfw_insn_u32))
1210                         bprintf(bp, ",%u", *a);
1211                 bprintf(bp, ")");
1212                 return;
1213         }
1214         if (cmd->o.opcode == O_IP_SRC_SET || cmd->o.opcode == O_IP_DST_SET) {
1215                 uint32_t x, *map = (uint32_t *)&(cmd->mask);
1216                 int i, j;
1217                 char comma = '{';
1218
1219                 x = cmd->o.arg1 - 1;
1220                 x = htonl( ~x );
1221                 cmd->addr.s_addr = htonl(cmd->addr.s_addr);
1222                 bprintf(bp, "%s/%d", inet_ntoa(cmd->addr),
1223                         contigmask((uint8_t *)&x, 32));
1224                 x = cmd->addr.s_addr = htonl(cmd->addr.s_addr);
1225                 x &= 0xff; /* base */
1226                 /*
1227                  * Print bits and ranges.
1228                  * Locate first bit set (i), then locate first bit unset (j).
1229                  * If we have 3+ consecutive bits set, then print them as a
1230                  * range, otherwise only print the initial bit and rescan.
1231                  */
1232                 for (i=0; i < cmd->o.arg1; i++)
1233                         if (map[i/32] & (1<<(i & 31))) {
1234                                 for (j=i+1; j < cmd->o.arg1; j++)
1235                                         if (!(map[ j/32] & (1<<(j & 31))))
1236                                                 break;
1237                                 bprintf(bp, "%c%d", comma, i+x);
1238                                 if (j>i+2) { /* range has at least 3 elements */
1239                                         bprintf(bp, "-%d", j-1+x);
1240                                         i = j-1;
1241                                 }
1242                                 comma = ',';
1243                         }
1244                 bprintf(bp, "}");
1245                 return;
1246         }
1247         /*
1248          * len == 2 indicates a single IP, whereas lists of 1 or more
1249          * addr/mask pairs have len = (2n+1). We convert len to n so we
1250          * use that to count the number of entries.
1251          */
1252     for (len = len / 2; len > 0; len--, a += 2) {
1253         int mb =        /* mask length */
1254             (cmd->o.opcode == O_IP_SRC || cmd->o.opcode == O_IP_DST) ?
1255                 32 : contigmask((uint8_t *)&(a[1]), 32);
1256         if (mb == 32 && co.do_resolv)
1257                 he = gethostbyaddr((char *)&(a[0]), sizeof(u_long), AF_INET);
1258         if (he != NULL)         /* resolved to name */
1259                 bprintf(bp, "%s", he->h_name);
1260         else if (mb == 0)       /* any */
1261                 bprintf(bp, "any");
1262         else {          /* numeric IP followed by some kind of mask */
1263                 ia = (struct in_addr *)&a[0];
1264                 bprintf(bp, "%s", inet_ntoa(*ia));
1265                 if (mb < 0) {
1266                         ia = (struct in_addr *)&a[1];
1267                         bprintf(bp, ":%s", inet_ntoa(*ia));
1268                 } else if (mb < 32)
1269                         bprintf(bp, "/%d", mb);
1270         }
1271         if (len > 1)
1272                 bprintf(bp, ",");
1273     }
1274 }
1275
1276 /*
1277  * prints a MAC address/mask pair
1278  */
1279 static void
1280 print_mac(struct buf_pr *bp, uint8_t *addr, uint8_t *mask)
1281 {
1282         int l = contigmask(mask, 48);
1283
1284         if (l == 0)
1285                 bprintf(bp, " any");
1286         else {
1287                 bprintf(bp, " %02x:%02x:%02x:%02x:%02x:%02x",
1288                     addr[0], addr[1], addr[2], addr[3], addr[4], addr[5]);
1289                 if (l == -1)
1290                         bprintf(bp, "&%02x:%02x:%02x:%02x:%02x:%02x",
1291                             mask[0], mask[1], mask[2],
1292                             mask[3], mask[4], mask[5]);
1293                 else if (l < 48)
1294                         bprintf(bp, "/%d", l);
1295         }
1296 }
1297
1298 static void
1299 fill_icmptypes(ipfw_insn_u32 *cmd, char *av)
1300 {
1301         uint8_t type;
1302
1303         cmd->d[0] = 0;
1304         while (*av) {
1305                 if (*av == ',')
1306                         av++;
1307
1308                 type = strtoul(av, &av, 0);
1309
1310                 if (*av != ',' && *av != '\0')
1311                         errx(EX_DATAERR, "invalid ICMP type");
1312
1313                 if (type > 31)
1314                         errx(EX_DATAERR, "ICMP type out of range");
1315
1316                 cmd->d[0] |= 1 << type;
1317         }
1318         cmd->o.opcode = O_ICMPTYPE;
1319         cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32);
1320 }
1321
1322 static void
1323 print_icmptypes(struct buf_pr *bp, ipfw_insn_u32 *cmd)
1324 {
1325         int i;
1326         char sep= ' ';
1327
1328         bprintf(bp, " icmptypes");
1329         for (i = 0; i < 32; i++) {
1330                 if ( (cmd->d[0] & (1 << (i))) == 0)
1331                         continue;
1332                 bprintf(bp, "%c%d", sep, i);
1333                 sep = ',';
1334         }
1335 }
1336
1337 static void
1338 print_dscp(struct buf_pr *bp, ipfw_insn_u32 *cmd)
1339 {
1340         int i = 0;
1341         uint32_t *v;
1342         char sep= ' ';
1343         const char *code;
1344
1345         bprintf(bp, " dscp");
1346         v = cmd->d;
1347         while (i < 64) {
1348                 if (*v & (1 << i)) {
1349                         if ((code = match_value(f_ipdscp, i)) != NULL)
1350                                 bprintf(bp, "%c%s", sep, code);
1351                         else
1352                                 bprintf(bp, "%c%d", sep, i);
1353                         sep = ',';
1354                 }
1355
1356                 if ((++i % 32) == 0)
1357                         v++;
1358         }
1359 }
1360
1361 /*
1362  * show_ipfw() prints the body of an ipfw rule.
1363  * Because the standard rule has at least proto src_ip dst_ip, we use
1364  * a helper function to produce these entries if not provided explicitly.
1365  * The first argument is the list of fields we have, the second is
1366  * the list of fields we want to be printed.
1367  *
1368  * Special cases if we have provided a MAC header:
1369  *   + if the rule does not contain IP addresses/ports, do not print them;
1370  *   + if the rule does not contain an IP proto, print "all" instead of "ip";
1371  *
1372  * Once we have 'have_options', IP header fields are printed as options.
1373  */
1374 #define HAVE_PROTO      0x0001
1375 #define HAVE_SRCIP      0x0002
1376 #define HAVE_DSTIP      0x0004
1377 #define HAVE_PROTO4     0x0008
1378 #define HAVE_PROTO6     0x0010
1379 #define HAVE_IP         0x0100
1380 #define HAVE_OPTIONS    0x8000
1381
1382 static void
1383 show_prerequisites(struct buf_pr *bp, int *flags, int want, int cmd)
1384 {
1385         (void)cmd;      /* UNUSED */
1386         if (co.comment_only)
1387                 return;
1388         if ( (*flags & HAVE_IP) == HAVE_IP)
1389                 *flags |= HAVE_OPTIONS;
1390
1391         if ( !(*flags & HAVE_OPTIONS)) {
1392                 if ( !(*flags & HAVE_PROTO) && (want & HAVE_PROTO)) {
1393                         if ( (*flags & HAVE_PROTO4))
1394                                 bprintf(bp, " ip4");
1395                         else if ( (*flags & HAVE_PROTO6))
1396                                 bprintf(bp, " ip6");
1397                         else
1398                                 bprintf(bp, " ip");
1399                 }
1400                 if ( !(*flags & HAVE_SRCIP) && (want & HAVE_SRCIP))
1401                         bprintf(bp, " from any");
1402                 if ( !(*flags & HAVE_DSTIP) && (want & HAVE_DSTIP))
1403                         bprintf(bp, " to any");
1404         }
1405         *flags |= want;
1406 }
1407
1408 static void
1409 show_static_rule(struct cmdline_opts *co, struct format_opts *fo,
1410     struct buf_pr *bp, struct ip_fw_rule *rule, struct ip_fw_bcounter *cntr)
1411 {
1412         static int twidth = 0;
1413         int l;
1414         ipfw_insn *cmd, *has_eaction = NULL, *tagptr = NULL;
1415         const char *comment = NULL;     /* ptr to comment if we have one */
1416         const char *ename;
1417         int proto = 0;          /* default */
1418         int flags = 0;  /* prerequisites */
1419         ipfw_insn_log *logptr = NULL; /* set if we find an O_LOG */
1420         ipfw_insn_altq *altqptr = NULL; /* set if we find an O_ALTQ */
1421         int or_block = 0;       /* we are in an or block */
1422         uint32_t uval;
1423
1424         if ((fo->set_mask & (1 << rule->set)) == 0) {
1425                 /* disabled mask */
1426                 if (!co->show_sets)
1427                         return;
1428                 else
1429                         bprintf(bp, "# DISABLED ");
1430         }
1431         bprintf(bp, "%05u ", rule->rulenum);
1432
1433         /* Print counters if enabled */
1434         if (fo->pcwidth > 0 || fo->bcwidth > 0) {
1435                 pr_u64(bp, &cntr->pcnt, fo->pcwidth);
1436                 pr_u64(bp, &cntr->bcnt, fo->bcwidth);
1437         }
1438
1439         if (co->do_time == 2)
1440                 bprintf(bp, "%10u ", cntr->timestamp);
1441         else if (co->do_time == 1) {
1442                 char timestr[30];
1443                 time_t t = (time_t)0;
1444
1445                 if (twidth == 0) {
1446                         strcpy(timestr, ctime(&t));
1447                         *strchr(timestr, '\n') = '\0';
1448                         twidth = strlen(timestr);
1449                 }
1450                 if (cntr->timestamp > 0) {
1451                         t = _long_to_time(cntr->timestamp);
1452
1453                         strcpy(timestr, ctime(&t));
1454                         *strchr(timestr, '\n') = '\0';
1455                         bprintf(bp, "%s ", timestr);
1456                 } else {
1457                         bprintf(bp, "%*s", twidth, " ");
1458                 }
1459         }
1460
1461         if (co->show_sets)
1462                 bprintf(bp, "set %d ", rule->set);
1463
1464         /*
1465          * print the optional "match probability"
1466          */
1467         if (rule->cmd_len > 0) {
1468                 cmd = rule->cmd ;
1469                 if (cmd->opcode == O_PROB) {
1470                         ipfw_insn_u32 *p = (ipfw_insn_u32 *)cmd;
1471                         double d = 1.0 * p->d[0];
1472
1473                         d = (d / 0x7fffffff);
1474                         bprintf(bp, "prob %f ", d);
1475                 }
1476         }
1477
1478         /*
1479          * first print actions
1480          */
1481         for (l = rule->cmd_len - rule->act_ofs, cmd = ACTION_PTR(rule);
1482                         l > 0 ; l -= F_LEN(cmd), cmd += F_LEN(cmd)) {
1483                 switch(cmd->opcode) {
1484                 case O_CHECK_STATE:
1485                         bprintf(bp, "check-state");
1486                         if (cmd->arg1 != 0)
1487                                 ename = object_search_ctlv(fo->tstate,
1488                                     cmd->arg1, IPFW_TLV_STATE_NAME);
1489                         else
1490                                 ename = NULL;
1491                         bprintf(bp, " :%s", ename ? ename: "any");
1492                         /* avoid printing anything else */
1493                         flags = HAVE_PROTO | HAVE_SRCIP |
1494                                 HAVE_DSTIP | HAVE_IP;
1495                         break;
1496
1497                 case O_ACCEPT:
1498                         bprintf(bp, "allow");
1499                         break;
1500
1501                 case O_COUNT:
1502                         bprintf(bp, "count");
1503                         break;
1504
1505                 case O_DENY:
1506                         bprintf(bp, "deny");
1507                         break;
1508
1509                 case O_REJECT:
1510                         if (cmd->arg1 == ICMP_REJECT_RST)
1511                                 bprintf(bp, "reset");
1512                         else if (cmd->arg1 == ICMP_REJECT_ABORT)
1513                                 bprintf(bp, "abort");
1514                         else if (cmd->arg1 == ICMP_UNREACH_HOST)
1515                                 bprintf(bp, "reject");
1516                         else
1517                                 print_reject_code(bp, cmd->arg1);
1518                         break;
1519
1520                 case O_UNREACH6:
1521                         if (cmd->arg1 == ICMP6_UNREACH_RST)
1522                                 bprintf(bp, "reset6");
1523                         else if (cmd->arg1 == ICMP6_UNREACH_ABORT)
1524                                 bprintf(bp, "abort6");
1525                         else
1526                                 print_unreach6_code(bp, cmd->arg1);
1527                         break;
1528
1529                 case O_SKIPTO:
1530                         bprint_uint_arg(bp, "skipto ", cmd->arg1);
1531                         break;
1532
1533                 case O_PIPE:
1534                         bprint_uint_arg(bp, "pipe ", cmd->arg1);
1535                         break;
1536
1537                 case O_QUEUE:
1538                         bprint_uint_arg(bp, "queue ", cmd->arg1);
1539                         break;
1540
1541                 case O_DIVERT:
1542                         bprint_uint_arg(bp, "divert ", cmd->arg1);
1543                         break;
1544
1545                 case O_TEE:
1546                         bprint_uint_arg(bp, "tee ", cmd->arg1);
1547                         break;
1548
1549                 case O_NETGRAPH:
1550                         bprint_uint_arg(bp, "netgraph ", cmd->arg1);
1551                         break;
1552
1553                 case O_NGTEE:
1554                         bprint_uint_arg(bp, "ngtee ", cmd->arg1);
1555                         break;
1556
1557                 case O_FORWARD_IP:
1558                     {
1559                         ipfw_insn_sa *s = (ipfw_insn_sa *)cmd;
1560
1561                         if (s->sa.sin_addr.s_addr == INADDR_ANY) {
1562                                 bprintf(bp, "fwd tablearg");
1563                         } else {
1564                                 bprintf(bp, "fwd %s",inet_ntoa(s->sa.sin_addr));
1565                         }
1566                         if (s->sa.sin_port)
1567                                 bprintf(bp, ",%d", s->sa.sin_port);
1568                     }
1569                         break;
1570
1571                 case O_FORWARD_IP6:
1572                     {
1573                         char buf[INET6_ADDRSTRLEN + IF_NAMESIZE + 2];
1574                         ipfw_insn_sa6 *s = (ipfw_insn_sa6 *)cmd;
1575
1576                         bprintf(bp, "fwd ");
1577                         if (getnameinfo((const struct sockaddr *)&s->sa,
1578                             sizeof(struct sockaddr_in6), buf, sizeof(buf),
1579                             NULL, 0, NI_NUMERICHOST) == 0)
1580                                 bprintf(bp, "%s", buf);
1581                         if (s->sa.sin6_port)
1582                                 bprintf(bp, ",%d", s->sa.sin6_port);
1583                     }
1584                         break;
1585
1586                 case O_LOG: /* O_LOG is printed last */
1587                         logptr = (ipfw_insn_log *)cmd;
1588                         break;
1589
1590                 case O_ALTQ: /* O_ALTQ is printed after O_LOG */
1591                         altqptr = (ipfw_insn_altq *)cmd;
1592                         break;
1593
1594                 case O_TAG:
1595                         tagptr = cmd;
1596                         break;
1597
1598                 case O_NAT:
1599                         if (cmd->arg1 != IP_FW_NAT44_GLOBAL)
1600                                 bprint_uint_arg(bp, "nat ", cmd->arg1);
1601                         else
1602                                 bprintf(bp, "nat global");
1603                         break;
1604
1605                 case O_SETFIB:
1606                         if (cmd->arg1 == IP_FW_TARG)
1607                                 bprint_uint_arg(bp, "setfib ", cmd->arg1);
1608                         else
1609                                 bprintf(bp, "setfib %u", cmd->arg1 & 0x7FFF);
1610                         break;
1611
1612                 case O_EXTERNAL_ACTION: {
1613                         /*
1614                          * The external action can consists of two following
1615                          * each other opcodes - O_EXTERNAL_ACTION and
1616                          * O_EXTERNAL_INSTANCE. The first contains the ID of
1617                          * name of external action. The second contains the ID
1618                          * of name of external action instance.
1619                          * NOTE: in case when external action has no named
1620                          * instances support, the second opcode isn't needed.
1621                          */
1622                         has_eaction = cmd;
1623                         ename = object_search_ctlv(fo->tstate, cmd->arg1,
1624                             IPFW_TLV_EACTION);
1625                         if (match_token(rule_eactions, ename) != -1)
1626                                 bprintf(bp, "%s", ename);
1627                         else
1628                                 bprintf(bp, "eaction %s", ename);
1629                         break;
1630                 }
1631
1632                 case O_EXTERNAL_INSTANCE: {
1633                         if (has_eaction == NULL)
1634                                 break;
1635                         /*
1636                          * XXX: we need to teach ipfw(9) to rewrite opcodes
1637                          * in the user buffer on rule addition. When we add
1638                          * the rule, we specify zero TLV type for
1639                          * O_EXTERNAL_INSTANCE object. To show correct
1640                          * rule after `ipfw add` we need to search instance
1641                          * name with zero type. But when we do `ipfw show`
1642                          * we calculate TLV type using IPFW_TLV_EACTION_NAME()
1643                          * macro.
1644                          */
1645                         ename = object_search_ctlv(fo->tstate, cmd->arg1, 0);
1646                         if (ename == NULL)
1647                                 ename = object_search_ctlv(fo->tstate,
1648                                     cmd->arg1,
1649                                     IPFW_TLV_EACTION_NAME(has_eaction->arg1));
1650                         bprintf(bp, " %s", ename);
1651                         break;
1652                 }
1653
1654                 case O_EXTERNAL_DATA: {
1655                         if (has_eaction == NULL)
1656                                 break;
1657                         /*
1658                          * Currently we support data formatting only for
1659                          * external data with datalen u16. For unknown data
1660                          * print its size in bytes.
1661                          */
1662                         if (cmd->len == F_INSN_SIZE(ipfw_insn))
1663                                 bprintf(bp, " %u", cmd->arg1);
1664                         else
1665                                 bprintf(bp, " %ubytes",
1666                                     cmd->len * sizeof(uint32_t));
1667                         break;
1668                 }
1669
1670                 case O_SETDSCP:
1671                     {
1672                         const char *code;
1673
1674                         if (cmd->arg1 == IP_FW_TARG) {
1675                                 bprint_uint_arg(bp, "setdscp ", cmd->arg1);
1676                                 break;
1677                         }
1678                         uval = cmd->arg1 & 0x3F;
1679                         if ((code = match_value(f_ipdscp, uval)) != NULL)
1680                                 bprintf(bp, "setdscp %s", code);
1681                         else
1682                                 bprint_uint_arg(bp, "setdscp ", uval);
1683                     }
1684                         break;
1685
1686                 case O_REASS:
1687                         bprintf(bp, "reass");
1688                         break;
1689
1690                 case O_CALLRETURN:
1691                         if (cmd->len & F_NOT)
1692                                 bprintf(bp, "return");
1693                         else
1694                                 bprint_uint_arg(bp, "call ", cmd->arg1);
1695                         break;
1696
1697                 default:
1698                         bprintf(bp, "** unrecognized action %d len %d ",
1699                                 cmd->opcode, cmd->len);
1700                 }
1701         }
1702         if (logptr) {
1703                 if (logptr->max_log > 0)
1704                         bprintf(bp, " log logamount %d", logptr->max_log);
1705                 else
1706                         bprintf(bp, " log");
1707         }
1708 #ifndef NO_ALTQ
1709         if (altqptr) {
1710                 print_altq_cmd(bp, altqptr);
1711         }
1712 #endif
1713         if (tagptr) {
1714                 if (tagptr->len & F_NOT)
1715                         bprint_uint_arg(bp, " untag ", tagptr->arg1);
1716                 else
1717                         bprint_uint_arg(bp, " tag ", tagptr->arg1);
1718         }
1719
1720         /*
1721          * then print the body.
1722          */
1723         for (l = rule->act_ofs, cmd = rule->cmd;
1724                         l > 0 ; l -= F_LEN(cmd) , cmd += F_LEN(cmd)) {
1725                 if ((cmd->len & F_OR) || (cmd->len & F_NOT))
1726                         continue;
1727                 if (cmd->opcode == O_IP4) {
1728                         flags |= HAVE_PROTO4;
1729                         break;
1730                 } else if (cmd->opcode == O_IP6) {
1731                         flags |= HAVE_PROTO6;
1732                         break;
1733                 }
1734         }
1735         if (rule->flags & IPFW_RULE_NOOPT) {    /* empty rules before options */
1736                 if (!co->do_compact) {
1737                         show_prerequisites(bp, &flags, HAVE_PROTO, 0);
1738                         bprintf(bp, " from any to any");
1739                 }
1740                 flags |= HAVE_IP | HAVE_OPTIONS | HAVE_PROTO |
1741                          HAVE_SRCIP | HAVE_DSTIP;
1742         }
1743
1744         if (co->comment_only)
1745                 comment = "...";
1746
1747         for (l = rule->act_ofs, cmd = rule->cmd;
1748                         l > 0 ; l -= F_LEN(cmd) , cmd += F_LEN(cmd)) {
1749                 /* useful alias */
1750                 ipfw_insn_u32 *cmd32 = (ipfw_insn_u32 *)cmd;
1751
1752                 if (co->comment_only) {
1753                         if (cmd->opcode != O_NOP)
1754                                 continue;
1755                         bprintf(bp, " // %s\n", (char *)(cmd + 1));
1756                         return;
1757                 }
1758
1759                 show_prerequisites(bp, &flags, 0, cmd->opcode);
1760
1761                 switch(cmd->opcode) {
1762                 case O_PROB:
1763                         break;  /* done already */
1764
1765                 case O_PROBE_STATE:
1766                         break; /* no need to print anything here */
1767
1768                 case O_IP_SRC:
1769                 case O_IP_SRC_LOOKUP:
1770                 case O_IP_SRC_MASK:
1771                 case O_IP_SRC_ME:
1772                 case O_IP_SRC_SET:
1773                         show_prerequisites(bp, &flags, HAVE_PROTO, 0);
1774                         if (!(flags & HAVE_SRCIP))
1775                                 bprintf(bp, " from");
1776                         if ((cmd->len & F_OR) && !or_block)
1777                                 bprintf(bp, " {");
1778                         print_ip(bp, fo, (ipfw_insn_ip *)cmd,
1779                                 (flags & HAVE_OPTIONS) ? " src-ip" : "");
1780                         flags |= HAVE_SRCIP;
1781                         break;
1782
1783                 case O_IP_DST:
1784                 case O_IP_DST_LOOKUP:
1785                 case O_IP_DST_MASK:
1786                 case O_IP_DST_ME:
1787                 case O_IP_DST_SET:
1788                         show_prerequisites(bp, &flags, HAVE_PROTO|HAVE_SRCIP, 0);
1789                         if (!(flags & HAVE_DSTIP))
1790                                 bprintf(bp, " to");
1791                         if ((cmd->len & F_OR) && !or_block)
1792                                 bprintf(bp, " {");
1793                         print_ip(bp, fo, (ipfw_insn_ip *)cmd,
1794                                 (flags & HAVE_OPTIONS) ? " dst-ip" : "");
1795                         flags |= HAVE_DSTIP;
1796                         break;
1797
1798                 case O_IP6_SRC:
1799                 case O_IP6_SRC_MASK:
1800                 case O_IP6_SRC_ME:
1801                         show_prerequisites(bp, &flags, HAVE_PROTO, 0);
1802                         if (!(flags & HAVE_SRCIP))
1803                                 bprintf(bp, " from");
1804                         if ((cmd->len & F_OR) && !or_block)
1805                                 bprintf(bp, " {");
1806                         print_ip6(bp, (ipfw_insn_ip6 *)cmd,
1807                             (flags & HAVE_OPTIONS) ? " src-ip6" : "");
1808                         flags |= HAVE_SRCIP | HAVE_PROTO;
1809                         break;
1810
1811                 case O_IP6_DST:
1812                 case O_IP6_DST_MASK:
1813                 case O_IP6_DST_ME:
1814                         show_prerequisites(bp, &flags, HAVE_PROTO|HAVE_SRCIP, 0);
1815                         if (!(flags & HAVE_DSTIP))
1816                                 bprintf(bp, " to");
1817                         if ((cmd->len & F_OR) && !or_block)
1818                                 bprintf(bp, " {");
1819                         print_ip6(bp, (ipfw_insn_ip6 *)cmd,
1820                             (flags & HAVE_OPTIONS) ? " dst-ip6" : "");
1821                         flags |= HAVE_DSTIP;
1822                         break;
1823
1824                 case O_FLOW6ID:
1825                         print_flow6id(bp, (ipfw_insn_u32 *) cmd );
1826                         flags |= HAVE_OPTIONS;
1827                         break;
1828
1829                 case O_IP_DSTPORT:
1830                         show_prerequisites(bp, &flags,
1831                                 HAVE_PROTO | HAVE_SRCIP |
1832                                 HAVE_DSTIP | HAVE_IP, 0);
1833                 case O_IP_SRCPORT:
1834                         if (flags & HAVE_DSTIP)
1835                                 flags |= HAVE_IP;
1836                         show_prerequisites(bp, &flags,
1837                                 HAVE_PROTO | HAVE_SRCIP, 0);
1838                         if ((cmd->len & F_OR) && !or_block)
1839                                 bprintf(bp, " {");
1840                         if (cmd->len & F_NOT)
1841                                 bprintf(bp, " not");
1842                         print_newports(bp, (ipfw_insn_u16 *)cmd, proto,
1843                                 (flags & HAVE_OPTIONS) ? cmd->opcode : 0);
1844                         break;
1845
1846                 case O_PROTO: {
1847                         struct protoent *pe = NULL;
1848
1849                         if ((cmd->len & F_OR) && !or_block)
1850                                 bprintf(bp, " {");
1851                         if (cmd->len & F_NOT)
1852                                 bprintf(bp, " not");
1853                         proto = cmd->arg1;
1854                         pe = getprotobynumber(cmd->arg1);
1855                         if ((flags & (HAVE_PROTO4 | HAVE_PROTO6)) &&
1856                             !(flags & HAVE_PROTO))
1857                                 show_prerequisites(bp, &flags,
1858                                     HAVE_PROTO | HAVE_IP | HAVE_SRCIP |
1859                                     HAVE_DSTIP | HAVE_OPTIONS, 0);
1860                         if (flags & HAVE_OPTIONS)
1861                                 bprintf(bp, " proto");
1862                         if (pe)
1863                                 bprintf(bp, " %s", pe->p_name);
1864                         else
1865                                 bprintf(bp, " %u", cmd->arg1);
1866                         }
1867                         flags |= HAVE_PROTO;
1868                         break;
1869
1870                 default: /*options ... */
1871                         if (!(cmd->len & (F_OR|F_NOT)))
1872                                 if (((cmd->opcode == O_IP6) &&
1873                                     (flags & HAVE_PROTO6)) ||
1874                                     ((cmd->opcode == O_IP4) &&
1875                                     (flags & HAVE_PROTO4)))
1876                                         break;
1877                         show_prerequisites(bp, &flags, HAVE_PROTO | HAVE_SRCIP |
1878                                     HAVE_DSTIP | HAVE_IP | HAVE_OPTIONS, 0);
1879                         if ((cmd->len & F_OR) && !or_block)
1880                                 bprintf(bp, " {");
1881                         if (cmd->len & F_NOT && cmd->opcode != O_IN)
1882                                 bprintf(bp, " not");
1883                         switch(cmd->opcode) {
1884                         case O_MACADDR2: {
1885                                 ipfw_insn_mac *m = (ipfw_insn_mac *)cmd;
1886
1887                                 bprintf(bp, " MAC");
1888                                 print_mac(bp, m->addr, m->mask);
1889                                 print_mac(bp, m->addr + 6, m->mask + 6);
1890                                 }
1891                                 break;
1892
1893                         case O_MAC_TYPE:
1894                                 print_newports(bp, (ipfw_insn_u16 *)cmd,
1895                                                 IPPROTO_ETHERTYPE, cmd->opcode);
1896                                 break;
1897
1898
1899                         case O_FRAG:
1900                                 bprintf(bp, " frag");
1901                                 break;
1902
1903                         case O_FIB:
1904                                 bprintf(bp, " fib %u", cmd->arg1 );
1905                                 break;
1906                         case O_SOCKARG:
1907                                 bprintf(bp, " sockarg");
1908                                 break;
1909
1910                         case O_IN:
1911                                 bprintf(bp, cmd->len & F_NOT ? " out" : " in");
1912                                 break;
1913
1914                         case O_DIVERTED:
1915                                 switch (cmd->arg1) {
1916                                 case 3:
1917                                         bprintf(bp, " diverted");
1918                                         break;
1919                                 case 1:
1920                                         bprintf(bp, " diverted-loopback");
1921                                         break;
1922                                 case 2:
1923                                         bprintf(bp, " diverted-output");
1924                                         break;
1925                                 default:
1926                                         bprintf(bp, " diverted-?<%u>", cmd->arg1);
1927                                         break;
1928                                 }
1929                                 break;
1930
1931                         case O_LAYER2:
1932                                 bprintf(bp, " layer2");
1933                                 break;
1934                         case O_XMIT:
1935                         case O_RECV:
1936                         case O_VIA:
1937                             {
1938                                 char const *s, *t;
1939                                 ipfw_insn_if *cmdif = (ipfw_insn_if *)cmd;
1940
1941                                 if (cmd->opcode == O_XMIT)
1942                                         s = "xmit";
1943                                 else if (cmd->opcode == O_RECV)
1944                                         s = "recv";
1945                                 else /* if (cmd->opcode == O_VIA) */
1946                                         s = "via";
1947                                 if (cmdif->name[0] == '\0')
1948                                         bprintf(bp, " %s %s", s,
1949                                             inet_ntoa(cmdif->p.ip));
1950                                 else if (cmdif->name[0] == '\1') {
1951                                         /* interface table */
1952                                         t = table_search_ctlv(fo->tstate,
1953                                             cmdif->p.kidx);
1954                                         bprintf(bp, " %s table(%s)", s, t);
1955                                 } else
1956                                         bprintf(bp, " %s %s", s, cmdif->name);
1957
1958                                 break;
1959                             }
1960                         case O_IP_FLOW_LOOKUP:
1961                             {
1962                                 char *t;
1963
1964                                 t = table_search_ctlv(fo->tstate, cmd->arg1);
1965                                 bprintf(bp, " flow table(%s", t);
1966                                 if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_u32))
1967                                         bprintf(bp, ",%u",
1968                                             ((ipfw_insn_u32 *)cmd)->d[0]);
1969                                 bprintf(bp, ")");
1970                                 break;
1971                             }
1972                         case O_IPID:
1973                                 if (F_LEN(cmd) == 1)
1974                                     bprintf(bp, " ipid %u", cmd->arg1 );
1975                                 else
1976                                     print_newports(bp, (ipfw_insn_u16 *)cmd, 0,
1977                                         O_IPID);
1978                                 break;
1979
1980                         case O_IPTTL:
1981                                 if (F_LEN(cmd) == 1)
1982                                     bprintf(bp, " ipttl %u", cmd->arg1 );
1983                                 else
1984                                     print_newports(bp, (ipfw_insn_u16 *)cmd, 0,
1985                                         O_IPTTL);
1986                                 break;
1987
1988                         case O_IPVER:
1989                                 bprintf(bp, " ipver %u", cmd->arg1 );
1990                                 break;
1991
1992                         case O_IPPRECEDENCE:
1993                                 bprintf(bp, " ipprecedence %u", cmd->arg1 >> 5);
1994                                 break;
1995
1996                         case O_DSCP:
1997                                 print_dscp(bp, (ipfw_insn_u32 *)cmd);
1998                                 break;
1999
2000                         case O_IPLEN:
2001                                 if (F_LEN(cmd) == 1)
2002                                     bprintf(bp, " iplen %u", cmd->arg1 );
2003                                 else
2004                                     print_newports(bp, (ipfw_insn_u16 *)cmd, 0,
2005                                         O_IPLEN);
2006                                 break;
2007
2008                         case O_IPOPT:
2009                                 print_flags(bp, "ipoptions", cmd, f_ipopts);
2010                                 break;
2011
2012                         case O_IPTOS:
2013                                 print_flags(bp, "iptos", cmd, f_iptos);
2014                                 break;
2015
2016                         case O_ICMPTYPE:
2017                                 print_icmptypes(bp, (ipfw_insn_u32 *)cmd);
2018                                 break;
2019
2020                         case O_ESTAB:
2021                                 bprintf(bp, " established");
2022                                 break;
2023
2024                         case O_TCPDATALEN:
2025                                 if (F_LEN(cmd) == 1)
2026                                     bprintf(bp, " tcpdatalen %u", cmd->arg1 );
2027                                 else
2028                                     print_newports(bp, (ipfw_insn_u16 *)cmd, 0,
2029                                         O_TCPDATALEN);
2030                                 break;
2031
2032                         case O_TCPFLAGS:
2033                                 print_flags(bp, "tcpflags", cmd, f_tcpflags);
2034                                 break;
2035
2036                         case O_TCPOPTS:
2037                                 print_flags(bp, "tcpoptions", cmd, f_tcpopts);
2038                                 break;
2039
2040                         case O_TCPWIN:
2041                                 if (F_LEN(cmd) == 1)
2042                                     bprintf(bp, " tcpwin %u", cmd->arg1);
2043                                 else
2044                                     print_newports(bp, (ipfw_insn_u16 *)cmd, 0,
2045                                         O_TCPWIN);
2046                                 break;
2047
2048                         case O_TCPACK:
2049                                 bprintf(bp, " tcpack %d", ntohl(cmd32->d[0]));
2050                                 break;
2051
2052                         case O_TCPSEQ:
2053                                 bprintf(bp, " tcpseq %d", ntohl(cmd32->d[0]));
2054                                 break;
2055
2056                         case O_UID:
2057                             {
2058                                 struct passwd *pwd = getpwuid(cmd32->d[0]);
2059
2060                                 if (pwd)
2061                                         bprintf(bp, " uid %s", pwd->pw_name);
2062                                 else
2063                                         bprintf(bp, " uid %u", cmd32->d[0]);
2064                             }
2065                                 break;
2066
2067                         case O_GID:
2068                             {
2069                                 struct group *grp = getgrgid(cmd32->d[0]);
2070
2071                                 if (grp)
2072                                         bprintf(bp, " gid %s", grp->gr_name);
2073                                 else
2074                                         bprintf(bp, " gid %u", cmd32->d[0]);
2075                             }
2076                                 break;
2077
2078                         case O_JAIL:
2079                                 bprintf(bp, " jail %d", cmd32->d[0]);
2080                                 break;
2081
2082                         case O_VERREVPATH:
2083                                 bprintf(bp, " verrevpath");
2084                                 break;
2085
2086                         case O_VERSRCREACH:
2087                                 bprintf(bp, " versrcreach");
2088                                 break;
2089
2090                         case O_ANTISPOOF:
2091                                 bprintf(bp, " antispoof");
2092                                 break;
2093
2094                         case O_IPSEC:
2095                                 bprintf(bp, " ipsec");
2096                                 break;
2097
2098                         case O_NOP:
2099                                 comment = (char *)(cmd + 1);
2100                                 break;
2101
2102                         case O_KEEP_STATE:
2103                                 bprintf(bp, " keep-state");
2104                                 bprintf(bp, " :%s",
2105                                     object_search_ctlv(fo->tstate, cmd->arg1,
2106                                     IPFW_TLV_STATE_NAME));
2107                                 break;
2108
2109                         case O_LIMIT: {
2110                                 struct _s_x *p = limit_masks;
2111                                 ipfw_insn_limit *c = (ipfw_insn_limit *)cmd;
2112                                 uint8_t x = c->limit_mask;
2113                                 char const *comma = " ";
2114
2115                                 bprintf(bp, " limit");
2116                                 for (; p->x != 0 ; p++)
2117                                         if ((x & p->x) == p->x) {
2118                                                 x &= ~p->x;
2119                                                 bprintf(bp, "%s%s", comma,p->s);
2120                                                 comma = ",";
2121                                         }
2122                                 bprint_uint_arg(bp, " ", c->conn_limit);
2123                                 bprintf(bp, " :%s",
2124                                     object_search_ctlv(fo->tstate, cmd->arg1,
2125                                     IPFW_TLV_STATE_NAME));
2126                                 break;
2127                         }
2128
2129                         case O_IP6:
2130                                 bprintf(bp, " ip6");
2131                                 break;
2132
2133                         case O_IP4:
2134                                 bprintf(bp, " ip4");
2135                                 break;
2136
2137                         case O_ICMP6TYPE:
2138                                 print_icmp6types(bp, (ipfw_insn_u32 *)cmd);
2139                                 break;
2140
2141                         case O_EXT_HDR:
2142                                 print_ext6hdr(bp, (ipfw_insn *)cmd);
2143                                 break;
2144
2145                         case O_TAGGED:
2146                                 if (F_LEN(cmd) == 1)
2147                                         bprint_uint_arg(bp, " tagged ",
2148                                             cmd->arg1);
2149                                 else
2150                                         print_newports(bp, (ipfw_insn_u16 *)cmd,
2151                                             0, O_TAGGED);
2152                                 break;
2153
2154                         default:
2155                                 bprintf(bp, " [opcode %d len %d]",
2156                                     cmd->opcode, cmd->len);
2157                         }
2158                 }
2159                 if (cmd->len & F_OR) {
2160                         bprintf(bp, " or");
2161                         or_block = 1;
2162                 } else if (or_block) {
2163                         bprintf(bp, " }");
2164                         or_block = 0;
2165                 }
2166         }
2167         show_prerequisites(bp, &flags, HAVE_PROTO | HAVE_SRCIP | HAVE_DSTIP
2168                                               | HAVE_IP, 0);
2169         if (comment)
2170                 bprintf(bp, " // %s", comment);
2171         bprintf(bp, "\n");
2172 }
2173
2174 static void
2175 show_dyn_state(struct cmdline_opts *co, struct format_opts *fo,
2176     struct buf_pr *bp, ipfw_dyn_rule *d)
2177 {
2178         struct protoent *pe;
2179         struct in_addr a;
2180         uint16_t rulenum;
2181         char buf[INET6_ADDRSTRLEN];
2182
2183         if (!co->do_expired) {
2184                 if (!d->expire && !(d->dyn_type == O_LIMIT_PARENT))
2185                         return;
2186         }
2187         bcopy(&d->rule, &rulenum, sizeof(rulenum));
2188         bprintf(bp, "%05d", rulenum);
2189         if (fo->pcwidth > 0 || fo->bcwidth > 0) {
2190                 bprintf(bp, " ");
2191                 pr_u64(bp, &d->pcnt, fo->pcwidth);
2192                 pr_u64(bp, &d->bcnt, fo->bcwidth);
2193                 bprintf(bp, "(%ds)", d->expire);
2194         }
2195         switch (d->dyn_type) {
2196         case O_LIMIT_PARENT:
2197                 bprintf(bp, " PARENT %d", d->count);
2198                 break;
2199         case O_LIMIT:
2200                 bprintf(bp, " LIMIT");
2201                 break;
2202         case O_KEEP_STATE: /* bidir, no mask */
2203                 bprintf(bp, " STATE");
2204                 break;
2205         }
2206
2207         if ((pe = getprotobynumber(d->id.proto)) != NULL)
2208                 bprintf(bp, " %s", pe->p_name);
2209         else
2210                 bprintf(bp, " proto %u", d->id.proto);
2211
2212         if (d->id.addr_type == 4) {
2213                 a.s_addr = htonl(d->id.src_ip);
2214                 bprintf(bp, " %s %d", inet_ntoa(a), d->id.src_port);
2215
2216                 a.s_addr = htonl(d->id.dst_ip);
2217                 bprintf(bp, " <-> %s %d", inet_ntoa(a), d->id.dst_port);
2218         } else if (d->id.addr_type == 6) {
2219                 bprintf(bp, " %s %d", inet_ntop(AF_INET6, &d->id.src_ip6, buf,
2220                     sizeof(buf)), d->id.src_port);
2221                 bprintf(bp, " <-> %s %d", inet_ntop(AF_INET6, &d->id.dst_ip6,
2222                     buf, sizeof(buf)), d->id.dst_port);
2223         } else
2224                 bprintf(bp, " UNKNOWN <-> UNKNOWN");
2225         if (d->kidx != 0)
2226                 bprintf(bp, " :%s", object_search_ctlv(fo->tstate,
2227                     d->kidx, IPFW_TLV_STATE_NAME));
2228 }
2229
2230 static int
2231 do_range_cmd(int cmd, ipfw_range_tlv *rt)
2232 {
2233         ipfw_range_header rh;
2234         size_t sz;
2235
2236         memset(&rh, 0, sizeof(rh));
2237         memcpy(&rh.range, rt, sizeof(*rt));
2238         rh.range.head.length = sizeof(*rt);
2239         rh.range.head.type = IPFW_TLV_RANGE;
2240         sz = sizeof(rh);
2241
2242         if (do_get3(cmd, &rh.opheader, &sz) != 0)
2243                 return (-1);
2244         /* Save number of matched objects */
2245         rt->new_set = rh.range.new_set;
2246         return (0);
2247 }
2248
2249 /*
2250  * This one handles all set-related commands
2251  *      ipfw set { show | enable | disable }
2252  *      ipfw set swap X Y
2253  *      ipfw set move X to Y
2254  *      ipfw set move rule X to Y
2255  */
2256 void
2257 ipfw_sets_handler(char *av[])
2258 {
2259         ipfw_range_tlv rt;
2260         char *msg;
2261         size_t size;
2262         uint32_t masks[2];
2263         int i;
2264         uint16_t rulenum;
2265         uint8_t cmd;
2266
2267         av++;
2268         memset(&rt, 0, sizeof(rt));
2269
2270         if (av[0] == NULL)
2271                 errx(EX_USAGE, "set needs command");
2272         if (_substrcmp(*av, "show") == 0) {
2273                 struct format_opts fo;
2274                 ipfw_cfg_lheader *cfg;
2275
2276                 memset(&fo, 0, sizeof(fo));
2277                 if (ipfw_get_config(&co, &fo, &cfg, &size) != 0)
2278                         err(EX_OSERR, "requesting config failed");
2279
2280                 for (i = 0, msg = "disable"; i < RESVD_SET; i++)
2281                         if ((cfg->set_mask & (1<<i)) == 0) {
2282                                 printf("%s %d", msg, i);
2283                                 msg = "";
2284                         }
2285                 msg = (cfg->set_mask != (uint32_t)-1) ? " enable" : "enable";
2286                 for (i = 0; i < RESVD_SET; i++)
2287                         if ((cfg->set_mask & (1<<i)) != 0) {
2288                                 printf("%s %d", msg, i);
2289                                 msg = "";
2290                         }
2291                 printf("\n");
2292                 free(cfg);
2293         } else if (_substrcmp(*av, "swap") == 0) {
2294                 av++;
2295                 if ( av[0] == NULL || av[1] == NULL )
2296                         errx(EX_USAGE, "set swap needs 2 set numbers\n");
2297                 rt.set = atoi(av[0]);
2298                 rt.new_set = atoi(av[1]);
2299                 if (!isdigit(*(av[0])) || rt.set > RESVD_SET)
2300                         errx(EX_DATAERR, "invalid set number %s\n", av[0]);
2301                 if (!isdigit(*(av[1])) || rt.new_set > RESVD_SET)
2302                         errx(EX_DATAERR, "invalid set number %s\n", av[1]);
2303                 i = do_range_cmd(IP_FW_SET_SWAP, &rt);
2304         } else if (_substrcmp(*av, "move") == 0) {
2305                 av++;
2306                 if (av[0] && _substrcmp(*av, "rule") == 0) {
2307                         rt.flags = IPFW_RCFLAG_RANGE; /* move rules to new set */
2308                         cmd = IP_FW_XMOVE;
2309                         av++;
2310                 } else
2311                         cmd = IP_FW_SET_MOVE; /* Move set to new one */
2312                 if (av[0] == NULL || av[1] == NULL || av[2] == NULL ||
2313                                 av[3] != NULL ||  _substrcmp(av[1], "to") != 0)
2314                         errx(EX_USAGE, "syntax: set move [rule] X to Y\n");
2315                 rulenum = atoi(av[0]);
2316                 rt.new_set = atoi(av[2]);
2317                 if (cmd == IP_FW_XMOVE) {
2318                         rt.start_rule = rulenum;
2319                         rt.end_rule = rulenum;
2320                 } else
2321                         rt.set = rulenum;
2322                 rt.new_set = atoi(av[2]);
2323                 if (!isdigit(*(av[0])) || (cmd == 3 && rt.set > RESVD_SET) ||
2324                         (cmd == 2 && rt.start_rule == IPFW_DEFAULT_RULE) )
2325                         errx(EX_DATAERR, "invalid source number %s\n", av[0]);
2326                 if (!isdigit(*(av[2])) || rt.new_set > RESVD_SET)
2327                         errx(EX_DATAERR, "invalid dest. set %s\n", av[1]);
2328                 i = do_range_cmd(cmd, &rt);
2329                 if (i < 0)
2330                         err(EX_OSERR, "failed to move %s",
2331                             cmd == IP_FW_SET_MOVE ? "set": "rule");
2332         } else if (_substrcmp(*av, "disable") == 0 ||
2333                    _substrcmp(*av, "enable") == 0 ) {
2334                 int which = _substrcmp(*av, "enable") == 0 ? 1 : 0;
2335
2336                 av++;
2337                 masks[0] = masks[1] = 0;
2338
2339                 while (av[0]) {
2340                         if (isdigit(**av)) {
2341                                 i = atoi(*av);
2342                                 if (i < 0 || i > RESVD_SET)
2343                                         errx(EX_DATAERR,
2344                                             "invalid set number %d\n", i);
2345                                 masks[which] |= (1<<i);
2346                         } else if (_substrcmp(*av, "disable") == 0)
2347                                 which = 0;
2348                         else if (_substrcmp(*av, "enable") == 0)
2349                                 which = 1;
2350                         else
2351                                 errx(EX_DATAERR,
2352                                         "invalid set command %s\n", *av);
2353                         av++;
2354                 }
2355                 if ( (masks[0] & masks[1]) != 0 )
2356                         errx(EX_DATAERR,
2357                             "cannot enable and disable the same set\n");
2358
2359                 rt.set = masks[0];
2360                 rt.new_set = masks[1];
2361                 i = do_range_cmd(IP_FW_SET_ENABLE, &rt);
2362                 if (i)
2363                         warn("set enable/disable: setsockopt(IP_FW_SET_ENABLE)");
2364         } else
2365                 errx(EX_USAGE, "invalid set command %s\n", *av);
2366 }
2367
2368 void
2369 ipfw_sysctl_handler(char *av[], int which)
2370 {
2371         av++;
2372
2373         if (av[0] == NULL) {
2374                 warnx("missing keyword to enable/disable\n");
2375         } else if (_substrcmp(*av, "firewall") == 0) {
2376                 sysctlbyname("net.inet.ip.fw.enable", NULL, 0,
2377                     &which, sizeof(which));
2378                 sysctlbyname("net.inet6.ip6.fw.enable", NULL, 0,
2379                     &which, sizeof(which));
2380         } else if (_substrcmp(*av, "one_pass") == 0) {
2381                 sysctlbyname("net.inet.ip.fw.one_pass", NULL, 0,
2382                     &which, sizeof(which));
2383         } else if (_substrcmp(*av, "debug") == 0) {
2384                 sysctlbyname("net.inet.ip.fw.debug", NULL, 0,
2385                     &which, sizeof(which));
2386         } else if (_substrcmp(*av, "verbose") == 0) {
2387                 sysctlbyname("net.inet.ip.fw.verbose", NULL, 0,
2388                     &which, sizeof(which));
2389         } else if (_substrcmp(*av, "dyn_keepalive") == 0) {
2390                 sysctlbyname("net.inet.ip.fw.dyn_keepalive", NULL, 0,
2391                     &which, sizeof(which));
2392 #ifndef NO_ALTQ
2393         } else if (_substrcmp(*av, "altq") == 0) {
2394                 altq_set_enabled(which);
2395 #endif
2396         } else {
2397                 warnx("unrecognize enable/disable keyword: %s\n", *av);
2398         }
2399 }
2400
2401 typedef void state_cb(struct cmdline_opts *co, struct format_opts *fo,
2402     void *arg, void *state);
2403
2404 static void
2405 prepare_format_dyn(struct cmdline_opts *co, struct format_opts *fo,
2406     void *arg, void *_state)
2407 {
2408         ipfw_dyn_rule *d;
2409         int width;
2410         uint8_t set;
2411
2412         d = (ipfw_dyn_rule *)_state;
2413         /* Count _ALL_ states */
2414         fo->dcnt++;
2415
2416         if (fo->show_counters == 0)
2417                 return;
2418
2419         if (co->use_set) {
2420                 /* skip states from another set */
2421                 bcopy((char *)&d->rule + sizeof(uint16_t), &set,
2422                     sizeof(uint8_t));
2423                 if (set != co->use_set - 1)
2424                         return;
2425         }
2426
2427         width = pr_u64(NULL, &d->pcnt, 0);
2428         if (width > fo->pcwidth)
2429                 fo->pcwidth = width;
2430
2431         width = pr_u64(NULL, &d->bcnt, 0);
2432         if (width > fo->bcwidth)
2433                 fo->bcwidth = width;
2434 }
2435
2436 static int
2437 foreach_state(struct cmdline_opts *co, struct format_opts *fo,
2438     caddr_t base, size_t sz, state_cb dyn_bc, void *dyn_arg)
2439 {
2440         int ttype;
2441         state_cb *fptr;
2442         void *farg;
2443         ipfw_obj_tlv *tlv;
2444         ipfw_obj_ctlv *ctlv;
2445
2446         fptr = NULL;
2447         ttype = 0;
2448
2449         while (sz > 0) {
2450                 ctlv = (ipfw_obj_ctlv *)base;
2451                 switch (ctlv->head.type) {
2452                 case IPFW_TLV_DYNSTATE_LIST:
2453                         base += sizeof(*ctlv);
2454                         sz -= sizeof(*ctlv);
2455                         ttype = IPFW_TLV_DYN_ENT;
2456                         fptr = dyn_bc;
2457                         farg = dyn_arg;
2458                         break;
2459                 default:
2460                         return (sz);
2461                 }
2462
2463                 while (sz > 0) {
2464                         tlv = (ipfw_obj_tlv *)base;
2465                         if (tlv->type != ttype)
2466                                 break;
2467
2468                         fptr(co, fo, farg, tlv + 1);
2469                         sz -= tlv->length;
2470                         base += tlv->length;
2471                 }
2472         }
2473
2474         return (sz);
2475 }
2476
2477 static void
2478 prepare_format_opts(struct cmdline_opts *co, struct format_opts *fo,
2479     ipfw_obj_tlv *rtlv, int rcnt, caddr_t dynbase, size_t dynsz)
2480 {
2481         int bcwidth, pcwidth, width;
2482         int n;
2483         struct ip_fw_bcounter *cntr;
2484         struct ip_fw_rule *r;
2485
2486         bcwidth = 0;
2487         pcwidth = 0;
2488         if (fo->show_counters != 0) {
2489                 for (n = 0; n < rcnt; n++,
2490                     rtlv = (ipfw_obj_tlv *)((caddr_t)rtlv + rtlv->length)) {
2491                         cntr = (struct ip_fw_bcounter *)(rtlv + 1);
2492                         r = (struct ip_fw_rule *)((caddr_t)cntr + cntr->size);
2493                         /* skip rules from another set */
2494                         if (co->use_set && r->set != co->use_set - 1)
2495                                 continue;
2496
2497                         /* packet counter */
2498                         width = pr_u64(NULL, &cntr->pcnt, 0);
2499                         if (width > pcwidth)
2500                                 pcwidth = width;
2501
2502                         /* byte counter */
2503                         width = pr_u64(NULL, &cntr->bcnt, 0);
2504                         if (width > bcwidth)
2505                                 bcwidth = width;
2506                 }
2507         }
2508         fo->bcwidth = bcwidth;
2509         fo->pcwidth = pcwidth;
2510
2511         fo->dcnt = 0;
2512         if (co->do_dynamic && dynsz > 0)
2513                 foreach_state(co, fo, dynbase, dynsz, prepare_format_dyn, NULL);
2514 }
2515
2516 static int
2517 list_static_range(struct cmdline_opts *co, struct format_opts *fo,
2518     struct buf_pr *bp, ipfw_obj_tlv *rtlv, int rcnt)
2519 {
2520         int n, seen;
2521         struct ip_fw_rule *r;
2522         struct ip_fw_bcounter *cntr;
2523         int c = 0;
2524
2525         for (n = seen = 0; n < rcnt; n++,
2526             rtlv = (ipfw_obj_tlv *)((caddr_t)rtlv + rtlv->length)) {
2527
2528                 if ((fo->show_counters | fo->show_time) != 0) {
2529                         cntr = (struct ip_fw_bcounter *)(rtlv + 1);
2530                         r = (struct ip_fw_rule *)((caddr_t)cntr + cntr->size);
2531                 } else {
2532                         cntr = NULL;
2533                         r = (struct ip_fw_rule *)(rtlv + 1);
2534                 }
2535                 if (r->rulenum > fo->last)
2536                         break;
2537                 if (co->use_set && r->set != co->use_set - 1)
2538                         continue;
2539                 if (r->rulenum >= fo->first && r->rulenum <= fo->last) {
2540                         show_static_rule(co, fo, bp, r, cntr);
2541                         printf("%s", bp->buf);
2542                         c += rtlv->length;
2543                         bp_flush(bp);
2544                         seen++;
2545                 }
2546         }
2547
2548         return (seen);
2549 }
2550
2551 static void
2552 list_dyn_state(struct cmdline_opts *co, struct format_opts *fo,
2553     void *_arg, void *_state)
2554 {
2555         uint16_t rulenum;
2556         uint8_t set;
2557         ipfw_dyn_rule *d;
2558         struct buf_pr *bp;
2559
2560         d = (ipfw_dyn_rule *)_state;
2561         bp = (struct buf_pr *)_arg;
2562
2563         bcopy(&d->rule, &rulenum, sizeof(rulenum));
2564         if (rulenum > fo->last)
2565                 return;
2566         if (co->use_set) {
2567                 bcopy((char *)&d->rule + sizeof(uint16_t),
2568                       &set, sizeof(uint8_t));
2569                 if (set != co->use_set - 1)
2570                         return;
2571         }
2572         if (rulenum >= fo->first) {
2573                 show_dyn_state(co, fo, bp, d);
2574                 printf("%s\n", bp->buf);
2575                 bp_flush(bp);
2576         }
2577 }
2578
2579 static int
2580 list_dyn_range(struct cmdline_opts *co, struct format_opts *fo,
2581     struct buf_pr *bp, caddr_t base, size_t sz)
2582 {
2583
2584         sz = foreach_state(co, fo, base, sz, list_dyn_state, bp);
2585         return (sz);
2586 }
2587
2588 void
2589 ipfw_list(int ac, char *av[], int show_counters)
2590 {
2591         ipfw_cfg_lheader *cfg;
2592         struct format_opts sfo;
2593         size_t sz;
2594         int error;
2595         int lac;
2596         char **lav;
2597         uint32_t rnum;
2598         char *endptr;
2599
2600         if (co.test_only) {
2601                 fprintf(stderr, "Testing only, list disabled\n");
2602                 return;
2603         }
2604         if (co.do_pipe) {
2605                 dummynet_list(ac, av, show_counters);
2606                 return;
2607         }
2608
2609         ac--;
2610         av++;
2611         memset(&sfo, 0, sizeof(sfo));
2612
2613         /* Determine rule range to request */
2614         if (ac > 0) {
2615                 for (lac = ac, lav = av; lac != 0; lac--) {
2616                         rnum = strtoul(*lav++, &endptr, 10);
2617                         if (sfo.first == 0 || rnum < sfo.first)
2618                                 sfo.first = rnum;
2619
2620                         if (*endptr == '-')
2621                                 rnum = strtoul(endptr + 1, &endptr, 10);
2622                         if (sfo.last == 0 || rnum > sfo.last)
2623                                 sfo.last = rnum;
2624                 }
2625         }
2626
2627         /* get configuraion from kernel */
2628         cfg = NULL;
2629         sfo.show_counters = show_counters;
2630         sfo.show_time = co.do_time;
2631         sfo.flags = IPFW_CFG_GET_STATIC;
2632         if (co.do_dynamic != 0)
2633                 sfo.flags |= IPFW_CFG_GET_STATES;
2634         if ((sfo.show_counters | sfo.show_time) != 0)
2635                 sfo.flags |= IPFW_CFG_GET_COUNTERS;
2636         if (ipfw_get_config(&co, &sfo, &cfg, &sz) != 0)
2637                 err(EX_OSERR, "retrieving config failed");
2638
2639         error = ipfw_show_config(&co, &sfo, cfg, sz, ac, av);
2640
2641         free(cfg);
2642
2643         if (error != EX_OK)
2644                 exit(error);
2645 }
2646
2647 static int
2648 ipfw_show_config(struct cmdline_opts *co, struct format_opts *fo,
2649     ipfw_cfg_lheader *cfg, size_t sz, int ac, char *av[])
2650 {
2651         caddr_t dynbase;
2652         size_t dynsz;
2653         int rcnt;
2654         int exitval = EX_OK;
2655         int lac;
2656         char **lav;
2657         char *endptr;
2658         size_t readsz;
2659         struct buf_pr bp;
2660         ipfw_obj_ctlv *ctlv, *tstate;
2661         ipfw_obj_tlv *rbase;
2662
2663         /*
2664          * Handle tablenames TLV first, if any
2665          */
2666         tstate = NULL;
2667         rbase = NULL;
2668         dynbase = NULL;
2669         dynsz = 0;
2670         readsz = sizeof(*cfg);
2671         rcnt = 0;
2672
2673         fo->set_mask = cfg->set_mask;
2674
2675         ctlv = (ipfw_obj_ctlv *)(cfg + 1);
2676
2677         if (cfg->flags & IPFW_CFG_GET_STATIC) {
2678                 /* We've requested static rules */
2679                 if (ctlv->head.type == IPFW_TLV_TBLNAME_LIST) {
2680                         object_sort_ctlv(ctlv);
2681                         fo->tstate = ctlv;
2682                         readsz += ctlv->head.length;
2683                         ctlv = (ipfw_obj_ctlv *)((caddr_t)ctlv +
2684                             ctlv->head.length);
2685                 }
2686
2687                 if (ctlv->head.type == IPFW_TLV_RULE_LIST) {
2688                         rbase = (ipfw_obj_tlv *)(ctlv + 1);
2689                         rcnt = ctlv->count;
2690                         readsz += ctlv->head.length;
2691                         ctlv = (ipfw_obj_ctlv *)((caddr_t)ctlv +
2692                             ctlv->head.length);
2693                 }
2694         }
2695
2696         if ((cfg->flags & IPFW_CFG_GET_STATES) && (readsz != sz))  {
2697                 /* We may have some dynamic states */
2698                 dynsz = sz - readsz;
2699                 /* Skip empty header */
2700                 if (dynsz != sizeof(ipfw_obj_ctlv))
2701                         dynbase = (caddr_t)ctlv;
2702                 else
2703                         dynsz = 0;
2704         }
2705
2706         prepare_format_opts(co, fo, rbase, rcnt, dynbase, dynsz);
2707         bp_alloc(&bp, 4096);
2708
2709         /* if no rule numbers were specified, list all rules */
2710         if (ac == 0) {
2711                 fo->first = 0;
2712                 fo->last = IPFW_DEFAULT_RULE;
2713                 list_static_range(co, fo, &bp, rbase, rcnt);
2714
2715                 if (co->do_dynamic && dynsz > 0) {
2716                         printf("## Dynamic rules (%d %zu):\n", fo->dcnt, dynsz);
2717                         list_dyn_range(co, fo, &bp, dynbase, dynsz);
2718                 }
2719
2720                 bp_free(&bp);
2721                 return (EX_OK);
2722         }
2723
2724         /* display specific rules requested on command line */
2725         for (lac = ac, lav = av; lac != 0; lac--) {
2726                 /* convert command line rule # */
2727                 fo->last = fo->first = strtoul(*lav++, &endptr, 10);
2728                 if (*endptr == '-')
2729                         fo->last = strtoul(endptr + 1, &endptr, 10);
2730                 if (*endptr) {
2731                         exitval = EX_USAGE;
2732                         warnx("invalid rule number: %s", *(lav - 1));
2733                         continue;
2734                 }
2735
2736                 if (list_static_range(co, fo, &bp, rbase, rcnt) == 0) {
2737                         /* give precedence to other error(s) */
2738                         if (exitval == EX_OK)
2739                                 exitval = EX_UNAVAILABLE;
2740                         if (fo->first == fo->last)
2741                                 warnx("rule %u does not exist", fo->first);
2742                         else
2743                                 warnx("no rules in range %u-%u",
2744                                     fo->first, fo->last);
2745                 }
2746         }
2747
2748         if (co->do_dynamic && dynsz > 0) {
2749                 printf("## Dynamic rules:\n");
2750                 for (lac = ac, lav = av; lac != 0; lac--) {
2751                         fo->last = fo->first = strtoul(*lav++, &endptr, 10);
2752                         if (*endptr == '-')
2753                                 fo->last = strtoul(endptr+1, &endptr, 10);
2754                         if (*endptr)
2755                                 /* already warned */
2756                                 continue;
2757                         list_dyn_range(co, fo, &bp, dynbase, dynsz);
2758                 }
2759         }
2760
2761         bp_free(&bp);
2762         return (exitval);
2763 }
2764
2765
2766 /*
2767  * Retrieves current ipfw configuration of given type
2768  * and stores its pointer to @pcfg.
2769  *
2770  * Caller is responsible for freeing @pcfg.
2771  *
2772  * Returns 0 on success.
2773  */
2774
2775 static int
2776 ipfw_get_config(struct cmdline_opts *co, struct format_opts *fo,
2777     ipfw_cfg_lheader **pcfg, size_t *psize)
2778 {
2779         ipfw_cfg_lheader *cfg;
2780         size_t sz;
2781         int i;
2782
2783
2784         if (co->test_only != 0) {
2785                 fprintf(stderr, "Testing only, list disabled\n");
2786                 return (0);
2787         }
2788
2789         /* Start with some data size */
2790         sz = 4096;
2791         cfg = NULL;
2792
2793         for (i = 0; i < 16; i++) {
2794                 if (cfg != NULL)
2795                         free(cfg);
2796                 if ((cfg = calloc(1, sz)) == NULL)
2797                         return (ENOMEM);
2798
2799                 cfg->flags = fo->flags;
2800                 cfg->start_rule = fo->first;
2801                 cfg->end_rule = fo->last;
2802
2803                 if (do_get3(IP_FW_XGET, &cfg->opheader, &sz) != 0) {
2804                         if (errno != ENOMEM) {
2805                                 free(cfg);
2806                                 return (errno);
2807                         }
2808
2809                         /* Buffer size is not enough. Try to increase */
2810                         sz = sz * 2;
2811                         if (sz < cfg->size)
2812                                 sz = cfg->size;
2813                         continue;
2814                 }
2815
2816                 *pcfg = cfg;
2817                 *psize = sz;
2818                 return (0);
2819         }
2820
2821         free(cfg);
2822         return (ENOMEM);
2823 }
2824
2825 static int
2826 lookup_host (char *host, struct in_addr *ipaddr)
2827 {
2828         struct hostent *he;
2829
2830         if (!inet_aton(host, ipaddr)) {
2831                 if ((he = gethostbyname(host)) == NULL)
2832                         return(-1);
2833                 *ipaddr = *(struct in_addr *)he->h_addr_list[0];
2834         }
2835         return(0);
2836 }
2837
2838 struct tidx {
2839         ipfw_obj_ntlv *idx;
2840         uint32_t count;
2841         uint32_t size;
2842         uint16_t counter;
2843         uint8_t set;
2844 };
2845
2846 int
2847 ipfw_check_object_name(const char *name)
2848 {
2849         int c, i, l;
2850
2851         /*
2852          * Check that name is null-terminated and contains
2853          * valid symbols only. Valid mask is:
2854          * [a-zA-Z0-9\-_\.]{1,63}
2855          */
2856         l = strlen(name);
2857         if (l == 0 || l >= 64)
2858                 return (EINVAL);
2859         for (i = 0; i < l; i++) {
2860                 c = name[i];
2861                 if (isalpha(c) || isdigit(c) || c == '_' ||
2862                     c == '-' || c == '.')
2863                         continue;
2864                 return (EINVAL);
2865         }
2866         return (0);
2867 }
2868
2869 static char *default_state_name = "default";
2870 static int
2871 state_check_name(const char *name)
2872 {
2873
2874         if (ipfw_check_object_name(name) != 0)
2875                 return (EINVAL);
2876         if (strcmp(name, "any") == 0)
2877                 return (EINVAL);
2878         return (0);
2879 }
2880
2881 static int
2882 eaction_check_name(const char *name)
2883 {
2884
2885         if (ipfw_check_object_name(name) != 0)
2886                 return (EINVAL);
2887         /* Restrict some 'special' names */
2888         if (match_token(rule_actions, name) != -1 &&
2889             match_token(rule_action_params, name) != -1)
2890                 return (EINVAL);
2891         return (0);
2892 }
2893
2894 static uint16_t
2895 pack_object(struct tidx *tstate, char *name, int otype)
2896 {
2897         int i;
2898         ipfw_obj_ntlv *ntlv;
2899
2900         for (i = 0; i < tstate->count; i++) {
2901                 if (strcmp(tstate->idx[i].name, name) != 0)
2902                         continue;
2903                 if (tstate->idx[i].set != tstate->set)
2904                         continue;
2905                 if (tstate->idx[i].head.type != otype)
2906                         continue;
2907
2908                 return (tstate->idx[i].idx);
2909         }
2910
2911         if (tstate->count + 1 > tstate->size) {
2912                 tstate->size += 4;
2913                 tstate->idx = realloc(tstate->idx, tstate->size *
2914                     sizeof(ipfw_obj_ntlv));
2915                 if (tstate->idx == NULL)
2916                         return (0);
2917         }
2918
2919         ntlv = &tstate->idx[i];
2920         memset(ntlv, 0, sizeof(ipfw_obj_ntlv));
2921         strlcpy(ntlv->name, name, sizeof(ntlv->name));
2922         ntlv->head.type = otype;
2923         ntlv->head.length = sizeof(ipfw_obj_ntlv);
2924         ntlv->set = tstate->set;
2925         ntlv->idx = ++tstate->counter;
2926         tstate->count++;
2927
2928         return (ntlv->idx);
2929 }
2930
2931 static uint16_t
2932 pack_table(struct tidx *tstate, char *name)
2933 {
2934
2935         if (table_check_name(name) != 0)
2936                 return (0);
2937
2938         return (pack_object(tstate, name, IPFW_TLV_TBL_NAME));
2939 }
2940
2941 void
2942 fill_table(struct _ipfw_insn *cmd, char *av, uint8_t opcode,
2943     struct tidx *tstate)
2944 {
2945         uint32_t *d = ((ipfw_insn_u32 *)cmd)->d;
2946         uint16_t uidx;
2947         char *p;
2948
2949         if ((p = strchr(av + 6, ')')) == NULL)
2950                 errx(EX_DATAERR, "forgotten parenthesis: '%s'", av);
2951         *p = '\0';
2952         p = strchr(av + 6, ',');
2953         if (p)
2954                 *p++ = '\0';
2955
2956         if ((uidx = pack_table(tstate, av + 6)) == 0)
2957                 errx(EX_DATAERR, "Invalid table name: %s", av + 6);
2958
2959         cmd->opcode = opcode;
2960         cmd->arg1 = uidx;
2961         if (p) {
2962                 cmd->len |= F_INSN_SIZE(ipfw_insn_u32);
2963                 d[0] = strtoul(p, NULL, 0);
2964         } else
2965                 cmd->len |= F_INSN_SIZE(ipfw_insn);
2966 }
2967
2968
2969 /*
2970  * fills the addr and mask fields in the instruction as appropriate from av.
2971  * Update length as appropriate.
2972  * The following formats are allowed:
2973  *      me      returns O_IP_*_ME
2974  *      1.2.3.4         single IP address
2975  *      1.2.3.4:5.6.7.8 address:mask
2976  *      1.2.3.4/24      address/mask
2977  *      1.2.3.4/26{1,6,5,4,23}  set of addresses in a subnet
2978  * We can have multiple comma-separated address/mask entries.
2979  */
2980 static void
2981 fill_ip(ipfw_insn_ip *cmd, char *av, int cblen, struct tidx *tstate)
2982 {
2983         int len = 0;
2984         uint32_t *d = ((ipfw_insn_u32 *)cmd)->d;
2985
2986         cmd->o.len &= ~F_LEN_MASK;      /* zero len */
2987
2988         if (_substrcmp(av, "any") == 0)
2989                 return;
2990
2991         if (_substrcmp(av, "me") == 0) {
2992                 cmd->o.len |= F_INSN_SIZE(ipfw_insn);
2993                 return;
2994         }
2995
2996         if (strncmp(av, "table(", 6) == 0) {
2997                 fill_table(&cmd->o, av, O_IP_DST_LOOKUP, tstate);
2998                 return;
2999         }
3000
3001     while (av) {
3002         /*
3003          * After the address we can have '/' or ':' indicating a mask,
3004          * ',' indicating another address follows, '{' indicating a
3005          * set of addresses of unspecified size.
3006          */
3007         char *t = NULL, *p = strpbrk(av, "/:,{");
3008         int masklen;
3009         char md, nd = '\0';
3010
3011         CHECK_LENGTH(cblen, F_INSN_SIZE(ipfw_insn) + 2 + len);
3012
3013         if (p) {
3014                 md = *p;
3015                 *p++ = '\0';
3016                 if ((t = strpbrk(p, ",{")) != NULL) {
3017                         nd = *t;
3018                         *t = '\0';
3019                 }
3020         } else
3021                 md = '\0';
3022
3023         if (lookup_host(av, (struct in_addr *)&d[0]) != 0)
3024                 errx(EX_NOHOST, "hostname ``%s'' unknown", av);
3025         switch (md) {
3026         case ':':
3027                 if (!inet_aton(p, (struct in_addr *)&d[1]))
3028                         errx(EX_DATAERR, "bad netmask ``%s''", p);
3029                 break;
3030         case '/':
3031                 masklen = atoi(p);
3032                 if (masklen == 0)
3033                         d[1] = htonl(0U);       /* mask */
3034                 else if (masklen > 32)
3035                         errx(EX_DATAERR, "bad width ``%s''", p);
3036                 else
3037                         d[1] = htonl(~0U << (32 - masklen));
3038                 break;
3039         case '{':       /* no mask, assume /24 and put back the '{' */
3040                 d[1] = htonl(~0U << (32 - 24));
3041                 *(--p) = md;
3042                 break;
3043
3044         case ',':       /* single address plus continuation */
3045                 *(--p) = md;
3046                 /* FALLTHROUGH */
3047         case 0:         /* initialization value */
3048         default:
3049                 d[1] = htonl(~0U);      /* force /32 */
3050                 break;
3051         }
3052         d[0] &= d[1];           /* mask base address with mask */
3053         if (t)
3054                 *t = nd;
3055         /* find next separator */
3056         if (p)
3057                 p = strpbrk(p, ",{");
3058         if (p && *p == '{') {
3059                 /*
3060                  * We have a set of addresses. They are stored as follows:
3061                  *   arg1       is the set size (powers of 2, 2..256)
3062                  *   addr       is the base address IN HOST FORMAT
3063                  *   mask..     is an array of arg1 bits (rounded up to
3064                  *              the next multiple of 32) with bits set
3065                  *              for each host in the map.
3066                  */
3067                 uint32_t *map = (uint32_t *)&cmd->mask;
3068                 int low, high;
3069                 int i = contigmask((uint8_t *)&(d[1]), 32);
3070
3071                 if (len > 0)
3072                         errx(EX_DATAERR, "address set cannot be in a list");
3073                 if (i < 24 || i > 31)
3074                         errx(EX_DATAERR, "invalid set with mask %d\n", i);
3075                 cmd->o.arg1 = 1<<(32-i);        /* map length           */
3076                 d[0] = ntohl(d[0]);             /* base addr in host format */
3077                 cmd->o.opcode = O_IP_DST_SET;   /* default */
3078                 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32) + (cmd->o.arg1+31)/32;
3079                 for (i = 0; i < (cmd->o.arg1+31)/32 ; i++)
3080                         map[i] = 0;     /* clear map */
3081
3082                 av = p + 1;
3083                 low = d[0] & 0xff;
3084                 high = low + cmd->o.arg1 - 1;
3085                 /*
3086                  * Here, i stores the previous value when we specify a range
3087                  * of addresses within a mask, e.g. 45-63. i = -1 means we
3088                  * have no previous value.
3089                  */
3090                 i = -1; /* previous value in a range */
3091                 while (isdigit(*av)) {
3092                         char *s;
3093                         int a = strtol(av, &s, 0);
3094
3095                         if (s == av) { /* no parameter */
3096                             if (*av != '}')
3097                                 errx(EX_DATAERR, "set not closed\n");
3098                             if (i != -1)
3099                                 errx(EX_DATAERR, "incomplete range %d-", i);
3100                             break;
3101                         }
3102                         if (a < low || a > high)
3103                             errx(EX_DATAERR, "addr %d out of range [%d-%d]\n",
3104                                 a, low, high);
3105                         a -= low;
3106                         if (i == -1)    /* no previous in range */
3107                             i = a;
3108                         else {          /* check that range is valid */
3109                             if (i > a)
3110                                 errx(EX_DATAERR, "invalid range %d-%d",
3111                                         i+low, a+low);
3112                             if (*s == '-')
3113                                 errx(EX_DATAERR, "double '-' in range");
3114                         }
3115                         for (; i <= a; i++)
3116                             map[i/32] |= 1<<(i & 31);
3117                         i = -1;
3118                         if (*s == '-')
3119                             i = a;
3120                         else if (*s == '}')
3121                             break;
3122                         av = s+1;
3123                 }
3124                 return;
3125         }
3126         av = p;
3127         if (av)                 /* then *av must be a ',' */
3128                 av++;
3129
3130         /* Check this entry */
3131         if (d[1] == 0) { /* "any", specified as x.x.x.x/0 */
3132                 /*
3133                  * 'any' turns the entire list into a NOP.
3134                  * 'not any' never matches, so it is removed from the
3135                  * list unless it is the only item, in which case we
3136                  * report an error.
3137                  */
3138                 if (cmd->o.len & F_NOT) {       /* "not any" never matches */
3139                         if (av == NULL && len == 0) /* only this entry */
3140                                 errx(EX_DATAERR, "not any never matches");
3141                 }
3142                 /* else do nothing and skip this entry */
3143                 return;
3144         }
3145         /* A single IP can be stored in an optimized format */
3146         if (d[1] == (uint32_t)~0 && av == NULL && len == 0) {
3147                 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32);
3148                 return;
3149         }
3150         len += 2;       /* two words... */
3151         d += 2;
3152     } /* end while */
3153     if (len + 1 > F_LEN_MASK)
3154         errx(EX_DATAERR, "address list too long");
3155     cmd->o.len |= len+1;
3156 }
3157
3158
3159 /* n2mask sets n bits of the mask */
3160 void
3161 n2mask(struct in6_addr *mask, int n)
3162 {
3163         static int      minimask[9] =
3164             { 0x00, 0x80, 0xc0, 0xe0, 0xf0, 0xf8, 0xfc, 0xfe, 0xff };
3165         u_char          *p;
3166
3167         memset(mask, 0, sizeof(struct in6_addr));
3168         p = (u_char *) mask;
3169         for (; n > 0; p++, n -= 8) {
3170                 if (n >= 8)
3171                         *p = 0xff;
3172                 else
3173                         *p = minimask[n];
3174         }
3175         return;
3176 }
3177
3178 static void
3179 fill_flags_cmd(ipfw_insn *cmd, enum ipfw_opcodes opcode,
3180         struct _s_x *flags, char *p)
3181 {
3182         char *e;
3183         uint32_t set = 0, clear = 0;
3184
3185         if (fill_flags(flags, p, &e, &set, &clear) != 0)
3186                 errx(EX_DATAERR, "invalid flag %s", e);
3187
3188         cmd->opcode = opcode;
3189         cmd->len =  (cmd->len & (F_NOT | F_OR)) | 1;
3190         cmd->arg1 = (set & 0xff) | ( (clear & 0xff) << 8);
3191 }
3192
3193
3194 void
3195 ipfw_delete(char *av[])
3196 {
3197         ipfw_range_tlv rt;
3198         char *sep;
3199         int i, j;
3200         int exitval = EX_OK;
3201         int do_set = 0;
3202
3203         av++;
3204         NEED1("missing rule specification");
3205         if ( *av && _substrcmp(*av, "set") == 0) {
3206                 /* Do not allow using the following syntax:
3207                  *      ipfw set N delete set M
3208                  */
3209                 if (co.use_set)
3210                         errx(EX_DATAERR, "invalid syntax");
3211                 do_set = 1;     /* delete set */
3212                 av++;
3213         }
3214
3215         /* Rule number */
3216         while (*av && isdigit(**av)) {
3217                 i = strtol(*av, &sep, 10);
3218                 j = i;
3219                 if (*sep== '-')
3220                         j = strtol(sep + 1, NULL, 10);
3221                 av++;
3222                 if (co.do_nat) {
3223                         exitval = do_cmd(IP_FW_NAT_DEL, &i, sizeof i);
3224                         if (exitval) {
3225                                 exitval = EX_UNAVAILABLE;
3226                                 warn("rule %u not available", i);
3227                         }
3228                 } else if (co.do_pipe) {
3229                         exitval = ipfw_delete_pipe(co.do_pipe, i);
3230                 } else {
3231                         memset(&rt, 0, sizeof(rt));
3232                         if (do_set != 0) {
3233                                 rt.set = i & 31;
3234                                 rt.flags = IPFW_RCFLAG_SET;
3235                         } else {
3236                                 rt.start_rule = i & 0xffff;
3237                                 rt.end_rule = j & 0xffff;
3238                                 if (rt.start_rule == 0 && rt.end_rule == 0)
3239                                         rt.flags |= IPFW_RCFLAG_ALL;
3240                                 else
3241                                         rt.flags |= IPFW_RCFLAG_RANGE;
3242                                 if (co.use_set != 0) {
3243                                         rt.set = co.use_set - 1;
3244                                         rt.flags |= IPFW_RCFLAG_SET;
3245                                 }
3246                         }
3247                         i = do_range_cmd(IP_FW_XDEL, &rt);
3248                         if (i != 0) {
3249                                 exitval = EX_UNAVAILABLE;
3250                                 warn("rule %u: setsockopt(IP_FW_XDEL)",
3251                                     rt.start_rule);
3252                         } else if (rt.new_set == 0 && do_set == 0) {
3253                                 exitval = EX_UNAVAILABLE;
3254                                 if (rt.start_rule != rt.end_rule)
3255                                         warnx("no rules rules in %u-%u range",
3256                                             rt.start_rule, rt.end_rule);
3257                                 else
3258                                         warnx("rule %u not found",
3259                                             rt.start_rule);
3260                         }
3261                 }
3262         }
3263         if (exitval != EX_OK)
3264                 exit(exitval);
3265 }
3266
3267
3268 /*
3269  * fill the interface structure. We do not check the name as we can
3270  * create interfaces dynamically, so checking them at insert time
3271  * makes relatively little sense.
3272  * Interface names containing '*', '?', or '[' are assumed to be shell
3273  * patterns which match interfaces.
3274  */
3275 static void
3276 fill_iface(ipfw_insn_if *cmd, char *arg, int cblen, struct tidx *tstate)
3277 {
3278         char *p;
3279         uint16_t uidx;
3280
3281         cmd->name[0] = '\0';
3282         cmd->o.len |= F_INSN_SIZE(ipfw_insn_if);
3283
3284         CHECK_CMDLEN;
3285
3286         /* Parse the interface or address */
3287         if (strcmp(arg, "any") == 0)
3288                 cmd->o.len = 0;         /* effectively ignore this command */
3289         else if (strncmp(arg, "table(", 6) == 0) {
3290                 if ((p = strchr(arg + 6, ')')) == NULL)
3291                         errx(EX_DATAERR, "forgotten parenthesis: '%s'", arg);
3292                 *p = '\0';
3293                 p = strchr(arg + 6, ',');
3294                 if (p)
3295                         *p++ = '\0';
3296                 if ((uidx = pack_table(tstate, arg + 6)) == 0)
3297                         errx(EX_DATAERR, "Invalid table name: %s", arg + 6);
3298
3299                 cmd->name[0] = '\1'; /* Special value indicating table */
3300                 cmd->p.kidx = uidx;
3301         } else if (!isdigit(*arg)) {
3302                 strlcpy(cmd->name, arg, sizeof(cmd->name));
3303                 cmd->p.glob = strpbrk(arg, "*?[") != NULL ? 1 : 0;
3304         } else if (!inet_aton(arg, &cmd->p.ip))
3305                 errx(EX_DATAERR, "bad ip address ``%s''", arg);
3306 }
3307
3308 static void
3309 get_mac_addr_mask(const char *p, uint8_t *addr, uint8_t *mask)
3310 {
3311         int i;
3312         size_t l;
3313         char *ap, *ptr, *optr;
3314         struct ether_addr *mac;
3315         const char *macset = "0123456789abcdefABCDEF:";
3316
3317         if (strcmp(p, "any") == 0) {
3318                 for (i = 0; i < ETHER_ADDR_LEN; i++)
3319                         addr[i] = mask[i] = 0;
3320                 return;
3321         }
3322
3323         optr = ptr = strdup(p);
3324         if ((ap = strsep(&ptr, "&/")) != NULL && *ap != 0) {
3325                 l = strlen(ap);
3326                 if (strspn(ap, macset) != l || (mac = ether_aton(ap)) == NULL)
3327                         errx(EX_DATAERR, "Incorrect MAC address");
3328                 bcopy(mac, addr, ETHER_ADDR_LEN);
3329         } else
3330                 errx(EX_DATAERR, "Incorrect MAC address");
3331
3332         if (ptr != NULL) { /* we have mask? */
3333                 if (p[ptr - optr - 1] == '/') { /* mask len */
3334                         long ml = strtol(ptr, &ap, 10);
3335                         if (*ap != 0 || ml > ETHER_ADDR_LEN * 8 || ml < 0)
3336                                 errx(EX_DATAERR, "Incorrect mask length");
3337                         for (i = 0; ml > 0 && i < ETHER_ADDR_LEN; ml -= 8, i++)
3338                                 mask[i] = (ml >= 8) ? 0xff: (~0) << (8 - ml);
3339                 } else { /* mask */
3340                         l = strlen(ptr);
3341                         if (strspn(ptr, macset) != l ||
3342                             (mac = ether_aton(ptr)) == NULL)
3343                                 errx(EX_DATAERR, "Incorrect mask");
3344                         bcopy(mac, mask, ETHER_ADDR_LEN);
3345                 }
3346         } else { /* default mask: ff:ff:ff:ff:ff:ff */
3347                 for (i = 0; i < ETHER_ADDR_LEN; i++)
3348                         mask[i] = 0xff;
3349         }
3350         for (i = 0; i < ETHER_ADDR_LEN; i++)
3351                 addr[i] &= mask[i];
3352
3353         free(optr);
3354 }
3355
3356 /*
3357  * helper function, updates the pointer to cmd with the length
3358  * of the current command, and also cleans up the first word of
3359  * the new command in case it has been clobbered before.
3360  */
3361 static ipfw_insn *
3362 next_cmd(ipfw_insn *cmd, int *len)
3363 {
3364         *len -= F_LEN(cmd);
3365         CHECK_LENGTH(*len, 0);
3366         cmd += F_LEN(cmd);
3367         bzero(cmd, sizeof(*cmd));
3368         return cmd;
3369 }
3370
3371 /*
3372  * Takes arguments and copies them into a comment
3373  */
3374 static void
3375 fill_comment(ipfw_insn *cmd, char **av, int cblen)
3376 {
3377         int i, l;
3378         char *p = (char *)(cmd + 1);
3379
3380         cmd->opcode = O_NOP;
3381         cmd->len =  (cmd->len & (F_NOT | F_OR));
3382
3383         /* Compute length of comment string. */
3384         for (i = 0, l = 0; av[i] != NULL; i++)
3385                 l += strlen(av[i]) + 1;
3386         if (l == 0)
3387                 return;
3388         if (l > 84)
3389                 errx(EX_DATAERR,
3390                     "comment too long (max 80 chars)");
3391         l = 1 + (l+3)/4;
3392         cmd->len =  (cmd->len & (F_NOT | F_OR)) | l;
3393         CHECK_CMDLEN;
3394
3395         for (i = 0; av[i] != NULL; i++) {
3396                 strcpy(p, av[i]);
3397                 p += strlen(av[i]);
3398                 *p++ = ' ';
3399         }
3400         *(--p) = '\0';
3401 }
3402
3403 /*
3404  * A function to fill simple commands of size 1.
3405  * Existing flags are preserved.
3406  */
3407 static void
3408 fill_cmd(ipfw_insn *cmd, enum ipfw_opcodes opcode, int flags, uint16_t arg)
3409 {
3410         cmd->opcode = opcode;
3411         cmd->len =  ((cmd->len | flags) & (F_NOT | F_OR)) | 1;
3412         cmd->arg1 = arg;
3413 }
3414
3415 /*
3416  * Fetch and add the MAC address and type, with masks. This generates one or
3417  * two microinstructions, and returns the pointer to the last one.
3418  */
3419 static ipfw_insn *
3420 add_mac(ipfw_insn *cmd, char *av[], int cblen)
3421 {
3422         ipfw_insn_mac *mac;
3423
3424         if ( ( av[0] == NULL ) || ( av[1] == NULL ) )
3425                 errx(EX_DATAERR, "MAC dst src");
3426
3427         cmd->opcode = O_MACADDR2;
3428         cmd->len = (cmd->len & (F_NOT | F_OR)) | F_INSN_SIZE(ipfw_insn_mac);
3429         CHECK_CMDLEN;
3430
3431         mac = (ipfw_insn_mac *)cmd;
3432         get_mac_addr_mask(av[0], mac->addr, mac->mask); /* dst */
3433         get_mac_addr_mask(av[1], &(mac->addr[ETHER_ADDR_LEN]),
3434             &(mac->mask[ETHER_ADDR_LEN])); /* src */
3435         return cmd;
3436 }
3437
3438 static ipfw_insn *
3439 add_mactype(ipfw_insn *cmd, char *av, int cblen)
3440 {
3441         if (!av)
3442                 errx(EX_DATAERR, "missing MAC type");
3443         if (strcmp(av, "any") != 0) { /* we have a non-null type */
3444                 fill_newports((ipfw_insn_u16 *)cmd, av, IPPROTO_ETHERTYPE,
3445                     cblen);
3446                 cmd->opcode = O_MAC_TYPE;
3447                 return cmd;
3448         } else
3449                 return NULL;
3450 }
3451
3452 static ipfw_insn *
3453 add_proto0(ipfw_insn *cmd, char *av, u_char *protop)
3454 {
3455         struct protoent *pe;
3456         char *ep;
3457         int proto;
3458
3459         proto = strtol(av, &ep, 10);
3460         if (*ep != '\0' || proto <= 0) {
3461                 if ((pe = getprotobyname(av)) == NULL)
3462                         return NULL;
3463                 proto = pe->p_proto;
3464         }
3465
3466         fill_cmd(cmd, O_PROTO, 0, proto);
3467         *protop = proto;
3468         return cmd;
3469 }
3470
3471 static ipfw_insn *
3472 add_proto(ipfw_insn *cmd, char *av, u_char *protop)
3473 {
3474         u_char proto = IPPROTO_IP;
3475
3476         if (_substrcmp(av, "all") == 0 || strcmp(av, "ip") == 0)
3477                 ; /* do not set O_IP4 nor O_IP6 */
3478         else if (strcmp(av, "ip4") == 0)
3479                 /* explicit "just IPv4" rule */
3480                 fill_cmd(cmd, O_IP4, 0, 0);
3481         else if (strcmp(av, "ip6") == 0) {
3482                 /* explicit "just IPv6" rule */
3483                 proto = IPPROTO_IPV6;
3484                 fill_cmd(cmd, O_IP6, 0, 0);
3485         } else
3486                 return add_proto0(cmd, av, protop);
3487
3488         *protop = proto;
3489         return cmd;
3490 }
3491
3492 static ipfw_insn *
3493 add_proto_compat(ipfw_insn *cmd, char *av, u_char *protop)
3494 {
3495         u_char proto = IPPROTO_IP;
3496
3497         if (_substrcmp(av, "all") == 0 || strcmp(av, "ip") == 0)
3498                 ; /* do not set O_IP4 nor O_IP6 */
3499         else if (strcmp(av, "ipv4") == 0 || strcmp(av, "ip4") == 0)
3500                 /* explicit "just IPv4" rule */
3501                 fill_cmd(cmd, O_IP4, 0, 0);
3502         else if (strcmp(av, "ipv6") == 0 || strcmp(av, "ip6") == 0) {
3503                 /* explicit "just IPv6" rule */
3504                 proto = IPPROTO_IPV6;
3505                 fill_cmd(cmd, O_IP6, 0, 0);
3506         } else
3507                 return add_proto0(cmd, av, protop);
3508
3509         *protop = proto;
3510         return cmd;
3511 }
3512
3513 static ipfw_insn *
3514 add_srcip(ipfw_insn *cmd, char *av, int cblen, struct tidx *tstate)
3515 {
3516         fill_ip((ipfw_insn_ip *)cmd, av, cblen, tstate);
3517         if (cmd->opcode == O_IP_DST_SET)                        /* set */
3518                 cmd->opcode = O_IP_SRC_SET;
3519         else if (cmd->opcode == O_IP_DST_LOOKUP)                /* table */
3520                 cmd->opcode = O_IP_SRC_LOOKUP;
3521         else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn))          /* me */
3522                 cmd->opcode = O_IP_SRC_ME;
3523         else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_u32))      /* one IP */
3524                 cmd->opcode = O_IP_SRC;
3525         else                                                    /* addr/mask */
3526                 cmd->opcode = O_IP_SRC_MASK;
3527         return cmd;
3528 }
3529
3530 static ipfw_insn *
3531 add_dstip(ipfw_insn *cmd, char *av, int cblen, struct tidx *tstate)
3532 {
3533         fill_ip((ipfw_insn_ip *)cmd, av, cblen, tstate);
3534         if (cmd->opcode == O_IP_DST_SET)                        /* set */
3535                 ;
3536         else if (cmd->opcode == O_IP_DST_LOOKUP)                /* table */
3537                 ;
3538         else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn))          /* me */
3539                 cmd->opcode = O_IP_DST_ME;
3540         else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_u32))      /* one IP */
3541                 cmd->opcode = O_IP_DST;
3542         else                                                    /* addr/mask */
3543                 cmd->opcode = O_IP_DST_MASK;
3544         return cmd;
3545 }
3546
3547 static struct _s_x f_reserved_keywords[] = {
3548         { "altq",       TOK_OR },
3549         { "//",         TOK_OR },
3550         { "diverted",   TOK_OR },
3551         { "dst-port",   TOK_OR },
3552         { "src-port",   TOK_OR },
3553         { "established",        TOK_OR },
3554         { "keep-state", TOK_OR },
3555         { "frag",       TOK_OR },
3556         { "icmptypes",  TOK_OR },
3557         { "in",         TOK_OR },
3558         { "out",        TOK_OR },
3559         { "ip6",        TOK_OR },
3560         { "any",        TOK_OR },
3561         { "to",         TOK_OR },
3562         { "via",        TOK_OR },
3563         { "{",          TOK_OR },
3564         { NULL, 0 }     /* terminator */
3565 };
3566
3567 static ipfw_insn *
3568 add_ports(ipfw_insn *cmd, char *av, u_char proto, int opcode, int cblen)
3569 {
3570
3571         if (match_token(f_reserved_keywords, av) != -1)
3572                 return (NULL);
3573
3574         if (fill_newports((ipfw_insn_u16 *)cmd, av, proto, cblen)) {
3575                 /* XXX todo: check that we have a protocol with ports */
3576                 cmd->opcode = opcode;
3577                 return cmd;
3578         }
3579         return NULL;
3580 }
3581
3582 static ipfw_insn *
3583 add_src(ipfw_insn *cmd, char *av, u_char proto, int cblen, struct tidx *tstate)
3584 {
3585         struct in6_addr a;
3586         char *host, *ch, buf[INET6_ADDRSTRLEN];
3587         ipfw_insn *ret = NULL;
3588         int len;
3589
3590         /* Copy first address in set if needed */
3591         if ((ch = strpbrk(av, "/,")) != NULL) {
3592                 len = ch - av;
3593                 strlcpy(buf, av, sizeof(buf));
3594                 if (len < sizeof(buf))
3595                         buf[len] = '\0';
3596                 host = buf;
3597         } else
3598                 host = av;
3599
3600         if (proto == IPPROTO_IPV6  || strcmp(av, "me6") == 0 ||
3601             inet_pton(AF_INET6, host, &a) == 1)
3602                 ret = add_srcip6(cmd, av, cblen, tstate);
3603         /* XXX: should check for IPv4, not !IPv6 */
3604         if (ret == NULL && (proto == IPPROTO_IP || strcmp(av, "me") == 0 ||
3605             inet_pton(AF_INET6, host, &a) != 1))
3606                 ret = add_srcip(cmd, av, cblen, tstate);
3607         if (ret == NULL && strcmp(av, "any") != 0)
3608                 ret = cmd;
3609
3610         return ret;
3611 }
3612
3613 static ipfw_insn *
3614 add_dst(ipfw_insn *cmd, char *av, u_char proto, int cblen, struct tidx *tstate)
3615 {
3616         struct in6_addr a;
3617         char *host, *ch, buf[INET6_ADDRSTRLEN];
3618         ipfw_insn *ret = NULL;
3619         int len;
3620
3621         /* Copy first address in set if needed */
3622         if ((ch = strpbrk(av, "/,")) != NULL) {
3623                 len = ch - av;
3624                 strlcpy(buf, av, sizeof(buf));
3625                 if (len < sizeof(buf))
3626                         buf[len] = '\0';
3627                 host = buf;
3628         } else
3629                 host = av;
3630
3631         if (proto == IPPROTO_IPV6  || strcmp(av, "me6") == 0 ||
3632             inet_pton(AF_INET6, host, &a) == 1)
3633                 ret = add_dstip6(cmd, av, cblen, tstate);
3634         /* XXX: should check for IPv4, not !IPv6 */
3635         if (ret == NULL && (proto == IPPROTO_IP || strcmp(av, "me") == 0 ||
3636             inet_pton(AF_INET6, host, &a) != 1))
3637                 ret = add_dstip(cmd, av, cblen, tstate);
3638         if (ret == NULL && strcmp(av, "any") != 0)
3639                 ret = cmd;
3640
3641         return ret;
3642 }
3643
3644 /*
3645  * Parse arguments and assemble the microinstructions which make up a rule.
3646  * Rules are added into the 'rulebuf' and then copied in the correct order
3647  * into the actual rule.
3648  *
3649  * The syntax for a rule starts with the action, followed by
3650  * optional action parameters, and the various match patterns.
3651  * In the assembled microcode, the first opcode must be an O_PROBE_STATE
3652  * (generated if the rule includes a keep-state option), then the
3653  * various match patterns, log/altq actions, and the actual action.
3654  *
3655  */
3656 void
3657 compile_rule(char *av[], uint32_t *rbuf, int *rbufsize, struct tidx *tstate)
3658 {
3659         /*
3660          * rules are added into the 'rulebuf' and then copied in
3661          * the correct order into the actual rule.
3662          * Some things that need to go out of order (prob, action etc.)
3663          * go into actbuf[].
3664          */
3665         static uint32_t actbuf[255], cmdbuf[255];
3666         int rblen, ablen, cblen;
3667
3668         ipfw_insn *src, *dst, *cmd, *action, *prev=NULL;
3669         ipfw_insn *first_cmd;   /* first match pattern */
3670
3671         struct ip_fw_rule *rule;
3672
3673         /*
3674          * various flags used to record that we entered some fields.
3675          */
3676         ipfw_insn *have_state = NULL;   /* check-state or keep-state */
3677         ipfw_insn *have_log = NULL, *have_altq = NULL, *have_tag = NULL;
3678         size_t len;
3679
3680         int i;
3681
3682         int open_par = 0;       /* open parenthesis ( */
3683
3684         /* proto is here because it is used to fetch ports */
3685         u_char proto = IPPROTO_IP;      /* default protocol */
3686
3687         double match_prob = 1; /* match probability, default is always match */
3688
3689         bzero(actbuf, sizeof(actbuf));          /* actions go here */
3690         bzero(cmdbuf, sizeof(cmdbuf));
3691         bzero(rbuf, *rbufsize);
3692
3693         rule = (struct ip_fw_rule *)rbuf;
3694         cmd = (ipfw_insn *)cmdbuf;
3695         action = (ipfw_insn *)actbuf;
3696
3697         rblen = *rbufsize / sizeof(uint32_t);
3698         rblen -= sizeof(struct ip_fw_rule) / sizeof(uint32_t);
3699         ablen = sizeof(actbuf) / sizeof(actbuf[0]);
3700         cblen = sizeof(cmdbuf) / sizeof(cmdbuf[0]);
3701         cblen -= F_INSN_SIZE(ipfw_insn_u32) + 1;
3702
3703 #define CHECK_RBUFLEN(len)      { CHECK_LENGTH(rblen, len); rblen -= len; }
3704 #define CHECK_ACTLEN            CHECK_LENGTH(ablen, action->len)
3705
3706         av++;
3707
3708         /* [rule N]     -- Rule number optional */
3709         if (av[0] && isdigit(**av)) {
3710                 rule->rulenum = atoi(*av);
3711                 av++;
3712         }
3713
3714         /* [set N]      -- set number (0..RESVD_SET), optional */
3715         if (av[0] && av[1] && _substrcmp(*av, "set") == 0) {
3716                 int set = strtoul(av[1], NULL, 10);
3717                 if (set < 0 || set > RESVD_SET)
3718                         errx(EX_DATAERR, "illegal set %s", av[1]);
3719                 rule->set = set;
3720                 tstate->set = set;
3721                 av += 2;
3722         }
3723
3724         /* [prob D]     -- match probability, optional */
3725         if (av[0] && av[1] && _substrcmp(*av, "prob") == 0) {
3726                 match_prob = strtod(av[1], NULL);
3727
3728                 if (match_prob <= 0 || match_prob > 1)
3729                         errx(EX_DATAERR, "illegal match prob. %s", av[1]);
3730                 av += 2;
3731         }
3732
3733         /* action       -- mandatory */
3734         NEED1("missing action");
3735         i = match_token(rule_actions, *av);
3736         av++;
3737         action->len = 1;        /* default */
3738         CHECK_ACTLEN;
3739         switch(i) {
3740         case TOK_CHECKSTATE:
3741                 have_state = action;
3742                 action->opcode = O_CHECK_STATE;
3743                 if (*av == NULL ||
3744                     match_token(rule_options, *av) == TOK_COMMENT) {
3745                         action->arg1 = pack_object(tstate,
3746                             default_state_name, IPFW_TLV_STATE_NAME);
3747                         break;
3748                 }
3749                 if (*av[0] == ':') {
3750                         if (strcmp(*av + 1, "any") == 0)
3751                                 action->arg1 = 0;
3752                         else if (state_check_name(*av + 1) == 0)
3753                                 action->arg1 = pack_object(tstate, *av + 1,
3754                                     IPFW_TLV_STATE_NAME);
3755                         else
3756                                 errx(EX_DATAERR, "Invalid state name %s",
3757                                     *av);
3758                         av++;
3759                         break;
3760                 }
3761                 errx(EX_DATAERR, "Invalid state name %s", *av);
3762                 break;
3763
3764         case TOK_ABORT:
3765                 action->opcode = O_REJECT;
3766                 action->arg1 = ICMP_REJECT_ABORT;
3767                 break;
3768
3769         case TOK_ABORT6:
3770                 action->opcode = O_UNREACH6;
3771                 action->arg1 = ICMP6_UNREACH_ABORT;
3772                 break;
3773
3774         case TOK_ACCEPT:
3775                 action->opcode = O_ACCEPT;
3776                 break;
3777
3778         case TOK_DENY:
3779                 action->opcode = O_DENY;
3780                 action->arg1 = 0;
3781                 break;
3782
3783         case TOK_REJECT:
3784                 action->opcode = O_REJECT;
3785                 action->arg1 = ICMP_UNREACH_HOST;
3786                 break;
3787
3788         case TOK_RESET:
3789                 action->opcode = O_REJECT;
3790                 action->arg1 = ICMP_REJECT_RST;
3791                 break;
3792
3793         case TOK_RESET6:
3794                 action->opcode = O_UNREACH6;
3795                 action->arg1 = ICMP6_UNREACH_RST;
3796                 break;
3797
3798         case TOK_UNREACH:
3799                 action->opcode = O_REJECT;
3800                 NEED1("missing reject code");
3801                 fill_reject_code(&action->arg1, *av);
3802                 av++;
3803                 break;
3804
3805         case TOK_UNREACH6:
3806                 action->opcode = O_UNREACH6;
3807                 NEED1("missing unreach code");
3808                 fill_unreach6_code(&action->arg1, *av);
3809                 av++;
3810                 break;
3811
3812         case TOK_COUNT:
3813                 action->opcode = O_COUNT;
3814                 break;
3815
3816         case TOK_NAT:
3817                 action->opcode = O_NAT;
3818                 action->len = F_INSN_SIZE(ipfw_insn_nat);
3819                 CHECK_ACTLEN;
3820                 if (*av != NULL && _substrcmp(*av, "global") == 0) {
3821                         action->arg1 = IP_FW_NAT44_GLOBAL;
3822                         av++;
3823                         break;
3824                 } else
3825                         goto chkarg;
3826         case TOK_QUEUE:
3827                 action->opcode = O_QUEUE;
3828                 goto chkarg;
3829         case TOK_PIPE:
3830                 action->opcode = O_PIPE;
3831                 goto chkarg;
3832         case TOK_SKIPTO:
3833                 action->opcode = O_SKIPTO;
3834                 goto chkarg;
3835         case TOK_NETGRAPH:
3836                 action->opcode = O_NETGRAPH;
3837                 goto chkarg;
3838         case TOK_NGTEE:
3839                 action->opcode = O_NGTEE;
3840                 goto chkarg;
3841         case TOK_DIVERT:
3842                 action->opcode = O_DIVERT;
3843                 goto chkarg;
3844         case TOK_TEE:
3845                 action->opcode = O_TEE;
3846                 goto chkarg;
3847         case TOK_CALL:
3848                 action->opcode = O_CALLRETURN;
3849 chkarg:
3850                 if (!av[0])
3851                         errx(EX_USAGE, "missing argument for %s", *(av - 1));
3852                 if (isdigit(**av)) {
3853                         action->arg1 = strtoul(*av, NULL, 10);
3854                         if (action->arg1 <= 0 || action->arg1 >= IP_FW_TABLEARG)
3855                                 errx(EX_DATAERR, "illegal argument for %s",
3856                                     *(av - 1));
3857                 } else if (_substrcmp(*av, "tablearg") == 0) {
3858                         action->arg1 = IP_FW_TARG;
3859                 } else if (i == TOK_DIVERT || i == TOK_TEE) {
3860                         struct servent *s;
3861                         setservent(1);
3862                         s = getservbyname(av[0], "divert");
3863                         if (s != NULL)
3864                                 action->arg1 = ntohs(s->s_port);
3865                         else
3866                                 errx(EX_DATAERR, "illegal divert/tee port");
3867                 } else
3868                         errx(EX_DATAERR, "illegal argument for %s", *(av - 1));
3869                 av++;
3870                 break;
3871
3872         case TOK_FORWARD: {
3873                 /*
3874                  * Locate the address-port separator (':' or ',').
3875                  * Could be one of the following:
3876                  *      hostname:port
3877                  *      IPv4 a.b.c.d,port
3878                  *      IPv4 a.b.c.d:port
3879                  *      IPv6 w:x:y::z,port
3880                  * The ':' can only be used with hostname and IPv4 address.
3881                  * XXX-BZ Should we also support [w:x:y::z]:port?
3882                  */
3883                 struct sockaddr_storage result;
3884                 struct addrinfo *res;
3885                 char *s, *end;
3886                 int family;
3887                 u_short port_number;
3888
3889                 NEED1("missing forward address[:port]");
3890
3891                 /*
3892                  * locate the address-port separator (':' or ',')
3893                  */
3894                 s = strchr(*av, ',');
3895                 if (s == NULL) {
3896                         /* Distinguish between IPv4:port and IPv6 cases. */
3897                         s = strchr(*av, ':');
3898                         if (s && strchr(s+1, ':'))
3899                                 s = NULL; /* no port */
3900                 }
3901
3902                 port_number = 0;
3903                 if (s != NULL) {
3904                         /* Terminate host portion and set s to start of port. */
3905                         *(s++) = '\0';
3906                         i = strtoport(s, &end, 0 /* base */, 0 /* proto */);
3907                         if (s == end)
3908                                 errx(EX_DATAERR,
3909                                     "illegal forwarding port ``%s''", s);
3910                         port_number = (u_short)i;
3911                 }
3912
3913                 if (_substrcmp(*av, "tablearg") == 0) {
3914                         family = PF_INET;
3915                         ((struct sockaddr_in*)&result)->sin_addr.s_addr =
3916                             INADDR_ANY;
3917                 } else {
3918                         /*
3919                          * Resolve the host name or address to a family and a
3920                          * network representation of the address.
3921                          */
3922                         if (getaddrinfo(*av, NULL, NULL, &res))
3923                                 errx(EX_DATAERR, NULL);
3924                         /* Just use the first host in the answer. */
3925                         family = res->ai_family;
3926                         memcpy(&result, res->ai_addr, res->ai_addrlen);
3927                         freeaddrinfo(res);
3928                 }
3929
3930                 if (family == PF_INET) {
3931                         ipfw_insn_sa *p = (ipfw_insn_sa *)action;
3932
3933                         action->opcode = O_FORWARD_IP;
3934                         action->len = F_INSN_SIZE(ipfw_insn_sa);
3935                         CHECK_ACTLEN;
3936
3937                         /*
3938                          * In the kernel we assume AF_INET and use only
3939                          * sin_port and sin_addr. Remember to set sin_len as
3940                          * the routing code seems to use it too.
3941                          */
3942                         p->sa.sin_len = sizeof(struct sockaddr_in);
3943                         p->sa.sin_family = AF_INET;
3944                         p->sa.sin_port = port_number;
3945                         p->sa.sin_addr.s_addr =
3946                              ((struct sockaddr_in *)&result)->sin_addr.s_addr;
3947                 } else if (family == PF_INET6) {
3948                         ipfw_insn_sa6 *p = (ipfw_insn_sa6 *)action;
3949
3950                         action->opcode = O_FORWARD_IP6;
3951                         action->len = F_INSN_SIZE(ipfw_insn_sa6);
3952                         CHECK_ACTLEN;
3953
3954                         p->sa.sin6_len = sizeof(struct sockaddr_in6);
3955                         p->sa.sin6_family = AF_INET6;
3956                         p->sa.sin6_port = port_number;
3957                         p->sa.sin6_flowinfo = 0;
3958                         p->sa.sin6_scope_id =
3959                             ((struct sockaddr_in6 *)&result)->sin6_scope_id;
3960                         bcopy(&((struct sockaddr_in6*)&result)->sin6_addr,
3961                             &p->sa.sin6_addr, sizeof(p->sa.sin6_addr));
3962                 } else {
3963                         errx(EX_DATAERR, "Invalid address family in forward action");
3964                 }
3965                 av++;
3966                 break;
3967             }
3968         case TOK_COMMENT:
3969                 /* pretend it is a 'count' rule followed by the comment */
3970                 action->opcode = O_COUNT;
3971                 av--;           /* go back... */
3972                 break;
3973
3974         case TOK_SETFIB:
3975             {
3976                 int numfibs;
3977                 size_t intsize = sizeof(int);
3978
3979                 action->opcode = O_SETFIB;
3980                 NEED1("missing fib number");
3981                 if (_substrcmp(*av, "tablearg") == 0) {
3982                         action->arg1 = IP_FW_TARG;
3983                 } else {
3984                         action->arg1 = strtoul(*av, NULL, 10);
3985                         if (sysctlbyname("net.fibs", &numfibs, &intsize,
3986                             NULL, 0) == -1)
3987                                 errx(EX_DATAERR, "fibs not suported.\n");
3988                         if (action->arg1 >= numfibs)  /* Temporary */
3989                                 errx(EX_DATAERR, "fib too large.\n");
3990                         /* Add high-order bit to fib to make room for tablearg*/
3991                         action->arg1 |= 0x8000;
3992                 }
3993                 av++;
3994                 break;
3995             }
3996
3997         case TOK_SETDSCP:
3998             {
3999                 int code;
4000
4001                 action->opcode = O_SETDSCP;
4002                 NEED1("missing DSCP code");
4003                 if (_substrcmp(*av, "tablearg") == 0) {
4004                         action->arg1 = IP_FW_TARG;
4005                 } else {
4006                         if (isalpha(*av[0])) {
4007                                 if ((code = match_token(f_ipdscp, *av)) == -1)
4008                                         errx(EX_DATAERR, "Unknown DSCP code");
4009                                 action->arg1 = code;
4010                         } else
4011                                 action->arg1 = strtoul(*av, NULL, 10);
4012                         /*
4013                          * Add high-order bit to DSCP to make room
4014                          * for tablearg
4015                          */
4016                         action->arg1 |= 0x8000;
4017                 }
4018                 av++;
4019                 break;
4020             }
4021
4022         case TOK_REASS:
4023                 action->opcode = O_REASS;
4024                 break;
4025
4026         case TOK_RETURN:
4027                 fill_cmd(action, O_CALLRETURN, F_NOT, 0);
4028                 break;
4029
4030         case TOK_TCPSETMSS: {
4031                 u_long mss;
4032                 uint16_t idx;
4033
4034                 idx = pack_object(tstate, "tcp-setmss", IPFW_TLV_EACTION);
4035                 if (idx == 0)
4036                         errx(EX_DATAERR, "pack_object failed");
4037                 fill_cmd(action, O_EXTERNAL_ACTION, 0, idx);
4038                 NEED1("Missing MSS value");
4039                 action = next_cmd(action, &ablen);
4040                 action->len = 1;
4041                 CHECK_ACTLEN;
4042                 mss = strtoul(*av, NULL, 10);
4043                 if (mss == 0 || mss > UINT16_MAX)
4044                         errx(EX_USAGE, "invalid MSS value %s", *av);
4045                 fill_cmd(action, O_EXTERNAL_DATA, 0, (uint16_t)mss);
4046                 av++;
4047                 break;
4048         }
4049
4050         default:
4051                 av--;
4052                 if (match_token(rule_eactions, *av) == -1)
4053                         errx(EX_DATAERR, "invalid action %s\n", *av);
4054                 /*
4055                  * External actions support.
4056                  * XXX: we support only syntax with instance name.
4057                  *      For known external actions (from rule_eactions list)
4058                  *      we can handle syntax directly. But with `eaction'
4059                  *      keyword we can use only `eaction <name> <instance>'
4060                  *      syntax.
4061                  */
4062         case TOK_EACTION: {
4063                 uint16_t idx;
4064
4065                 NEED1("Missing eaction name");
4066                 if (eaction_check_name(*av) != 0)
4067                         errx(EX_DATAERR, "Invalid eaction name %s", *av);
4068                 idx = pack_object(tstate, *av, IPFW_TLV_EACTION);
4069                 if (idx == 0)
4070                         errx(EX_DATAERR, "pack_object failed");
4071                 fill_cmd(action, O_EXTERNAL_ACTION, 0, idx);
4072                 av++;
4073                 NEED1("Missing eaction instance name");
4074                 action = next_cmd(action, &ablen);
4075                 action->len = 1;
4076                 CHECK_ACTLEN;
4077                 if (eaction_check_name(*av) != 0)
4078                         errx(EX_DATAERR, "Invalid eaction instance name %s",
4079                             *av);
4080                 /*
4081                  * External action instance object has TLV type depended
4082                  * from the external action name object index. Since we
4083                  * currently don't know this index, use zero as TLV type.
4084                  */
4085                 idx = pack_object(tstate, *av, 0);
4086                 if (idx == 0)
4087                         errx(EX_DATAERR, "pack_object failed");
4088                 fill_cmd(action, O_EXTERNAL_INSTANCE, 0, idx);
4089                 av++;
4090                 }
4091         }
4092         action = next_cmd(action, &ablen);
4093
4094         /*
4095          * [altq queuename] -- altq tag, optional
4096          * [log [logamount N]]  -- log, optional
4097          *
4098          * If they exist, it go first in the cmdbuf, but then it is
4099          * skipped in the copy section to the end of the buffer.
4100          */
4101         while (av[0] != NULL && (i = match_token(rule_action_params, *av)) != -1) {
4102                 av++;
4103                 switch (i) {
4104                 case TOK_LOG:
4105                     {
4106                         ipfw_insn_log *c = (ipfw_insn_log *)cmd;
4107                         int l;
4108
4109                         if (have_log)
4110                                 errx(EX_DATAERR,
4111                                     "log cannot be specified more than once");
4112                         have_log = (ipfw_insn *)c;
4113                         cmd->len = F_INSN_SIZE(ipfw_insn_log);
4114                         CHECK_CMDLEN;
4115                         cmd->opcode = O_LOG;
4116                         if (av[0] && _substrcmp(*av, "logamount") == 0) {
4117                                 av++;
4118                                 NEED1("logamount requires argument");
4119                                 l = atoi(*av);
4120                                 if (l < 0)
4121                                         errx(EX_DATAERR,
4122                                             "logamount must be positive");
4123                                 c->max_log = l;
4124                                 av++;
4125                         } else {
4126                                 len = sizeof(c->max_log);
4127                                 if (sysctlbyname("net.inet.ip.fw.verbose_limit",
4128                                     &c->max_log, &len, NULL, 0) == -1) {
4129                                         if (co.test_only) {
4130                                                 c->max_log = 0;
4131                                                 break;
4132                                         }
4133                                         errx(1, "sysctlbyname(\"%s\")",
4134                                             "net.inet.ip.fw.verbose_limit");
4135                                 }
4136                         }
4137                     }
4138                         break;
4139
4140 #ifndef NO_ALTQ
4141                 case TOK_ALTQ:
4142                     {
4143                         ipfw_insn_altq *a = (ipfw_insn_altq *)cmd;
4144
4145                         NEED1("missing altq queue name");
4146                         if (have_altq)
4147                                 errx(EX_DATAERR,
4148                                     "altq cannot be specified more than once");
4149                         have_altq = (ipfw_insn *)a;
4150                         cmd->len = F_INSN_SIZE(ipfw_insn_altq);
4151                         CHECK_CMDLEN;
4152                         cmd->opcode = O_ALTQ;
4153                         a->qid = altq_name_to_qid(*av);
4154                         av++;
4155                     }
4156                         break;
4157 #endif
4158
4159                 case TOK_TAG:
4160                 case TOK_UNTAG: {
4161                         uint16_t tag;
4162
4163                         if (have_tag)
4164                                 errx(EX_USAGE, "tag and untag cannot be "
4165                                     "specified more than once");
4166                         GET_UINT_ARG(tag, IPFW_ARG_MIN, IPFW_ARG_MAX, i,
4167                            rule_action_params);
4168                         have_tag = cmd;
4169                         fill_cmd(cmd, O_TAG, (i == TOK_TAG) ? 0: F_NOT, tag);
4170                         av++;
4171                         break;
4172                 }
4173
4174                 default:
4175                         abort();
4176                 }
4177                 cmd = next_cmd(cmd, &cblen);
4178         }
4179
4180         if (have_state) { /* must be a check-state, we are done */
4181                 if (*av != NULL &&
4182                     match_token(rule_options, *av) == TOK_COMMENT) {
4183                         /* check-state has a comment */
4184                         av++;
4185                         fill_comment(cmd, av, cblen);
4186                         cmd = next_cmd(cmd, &cblen);
4187                         av[0] = NULL;
4188                 }
4189                 goto done;
4190         }
4191
4192 #define OR_START(target)                                        \
4193         if (av[0] && (*av[0] == '(' || *av[0] == '{')) {        \
4194                 if (open_par)                                   \
4195                         errx(EX_USAGE, "nested \"(\" not allowed\n"); \
4196                 prev = NULL;                                    \
4197                 open_par = 1;                                   \
4198                 if ( (av[0])[1] == '\0') {                      \
4199                         av++;                                   \
4200                 } else                                          \
4201                         (*av)++;                                \
4202         }                                                       \
4203         target:                                                 \
4204
4205
4206 #define CLOSE_PAR                                               \
4207         if (open_par) {                                         \
4208                 if (av[0] && (                                  \
4209                     strcmp(*av, ")") == 0 ||                    \
4210                     strcmp(*av, "}") == 0)) {                   \
4211                         prev = NULL;                            \
4212                         open_par = 0;                           \
4213                         av++;                                   \
4214                 } else                                          \
4215                         errx(EX_USAGE, "missing \")\"\n");      \
4216         }
4217
4218 #define NOT_BLOCK                                               \
4219         if (av[0] && _substrcmp(*av, "not") == 0) {             \
4220                 if (cmd->len & F_NOT)                           \
4221                         errx(EX_USAGE, "double \"not\" not allowed\n"); \
4222                 cmd->len |= F_NOT;                              \
4223                 av++;                                           \
4224         }
4225
4226 #define OR_BLOCK(target)                                        \
4227         if (av[0] && _substrcmp(*av, "or") == 0) {              \
4228                 if (prev == NULL || open_par == 0)              \
4229                         errx(EX_DATAERR, "invalid OR block");   \
4230                 prev->len |= F_OR;                              \
4231                 av++;                                   \
4232                 goto target;                                    \
4233         }                                                       \
4234         CLOSE_PAR;
4235
4236         first_cmd = cmd;
4237
4238 #if 0
4239         /*
4240          * MAC addresses, optional.
4241          * If we have this, we skip the part "proto from src to dst"
4242          * and jump straight to the option parsing.
4243          */
4244         NOT_BLOCK;
4245         NEED1("missing protocol");
4246         if (_substrcmp(*av, "MAC") == 0 ||
4247             _substrcmp(*av, "mac") == 0) {
4248                 av++;                   /* the "MAC" keyword */
4249                 add_mac(cmd, av);       /* exits in case of errors */
4250                 cmd = next_cmd(cmd);
4251                 av += 2;                /* dst-mac and src-mac */
4252                 NOT_BLOCK;
4253                 NEED1("missing mac type");
4254                 if (add_mactype(cmd, av[0]))
4255                         cmd = next_cmd(cmd);
4256                 av++;                   /* any or mac-type */
4257                 goto read_options;
4258         }
4259 #endif
4260
4261         /*
4262          * protocol, mandatory
4263          */
4264     OR_START(get_proto);
4265         NOT_BLOCK;
4266         NEED1("missing protocol");
4267         if (add_proto_compat(cmd, *av, &proto)) {
4268                 av++;
4269                 if (F_LEN(cmd) != 0) {
4270                         prev = cmd;
4271                         cmd = next_cmd(cmd, &cblen);
4272                 }
4273         } else if (first_cmd != cmd) {
4274                 errx(EX_DATAERR, "invalid protocol ``%s''", *av);
4275         } else
4276                 goto read_options;
4277     OR_BLOCK(get_proto);
4278
4279         /*
4280          * "from", mandatory
4281          */
4282         if ((av[0] == NULL) || _substrcmp(*av, "from") != 0)
4283                 errx(EX_USAGE, "missing ``from''");
4284         av++;
4285
4286         /*
4287          * source IP, mandatory
4288          */
4289     OR_START(source_ip);
4290         NOT_BLOCK;      /* optional "not" */
4291         NEED1("missing source address");
4292         if (add_src(cmd, *av, proto, cblen, tstate)) {
4293                 av++;
4294                 if (F_LEN(cmd) != 0) {  /* ! any */
4295                         prev = cmd;
4296                         cmd = next_cmd(cmd, &cblen);
4297                 }
4298         } else
4299                 errx(EX_USAGE, "bad source address %s", *av);
4300     OR_BLOCK(source_ip);
4301
4302         /*
4303          * source ports, optional
4304          */
4305         NOT_BLOCK;      /* optional "not" */
4306         if ( av[0] != NULL ) {
4307                 if (_substrcmp(*av, "any") == 0 ||
4308                     add_ports(cmd, *av, proto, O_IP_SRCPORT, cblen)) {
4309                         av++;
4310                         if (F_LEN(cmd) != 0)
4311                                 cmd = next_cmd(cmd, &cblen);
4312                 }
4313         }
4314
4315         /*
4316          * "to", mandatory
4317          */
4318         if ( (av[0] == NULL) || _substrcmp(*av, "to") != 0 )
4319                 errx(EX_USAGE, "missing ``to''");
4320         av++;
4321
4322         /*
4323          * destination, mandatory
4324          */
4325     OR_START(dest_ip);
4326         NOT_BLOCK;      /* optional "not" */
4327         NEED1("missing dst address");
4328         if (add_dst(cmd, *av, proto, cblen, tstate)) {
4329                 av++;
4330                 if (F_LEN(cmd) != 0) {  /* ! any */
4331                         prev = cmd;
4332                         cmd = next_cmd(cmd, &cblen);
4333                 }
4334         } else
4335                 errx( EX_USAGE, "bad destination address %s", *av);
4336     OR_BLOCK(dest_ip);
4337
4338         /*
4339          * dest. ports, optional
4340          */
4341         NOT_BLOCK;      /* optional "not" */
4342         if (av[0]) {
4343                 if (_substrcmp(*av, "any") == 0 ||
4344                     add_ports(cmd, *av, proto, O_IP_DSTPORT, cblen)) {
4345                         av++;
4346                         if (F_LEN(cmd) != 0)
4347                                 cmd = next_cmd(cmd, &cblen);
4348                 }
4349         }
4350
4351 read_options:
4352         if (av[0] && first_cmd == cmd) {
4353                 /*
4354                  * nothing specified so far, store in the rule to ease
4355                  * printout later.
4356                  */
4357                  rule->flags |= IPFW_RULE_NOOPT;
4358         }
4359         prev = NULL;
4360         while ( av[0] != NULL ) {
4361                 char *s;
4362                 ipfw_insn_u32 *cmd32;   /* alias for cmd */
4363
4364                 s = *av;
4365                 cmd32 = (ipfw_insn_u32 *)cmd;
4366
4367                 if (*s == '!') {        /* alternate syntax for NOT */
4368                         if (cmd->len & F_NOT)
4369                                 errx(EX_USAGE, "double \"not\" not allowed\n");
4370                         cmd->len = F_NOT;
4371                         s++;
4372                 }
4373                 i = match_token(rule_options, s);
4374                 av++;
4375                 switch(i) {
4376                 case TOK_NOT:
4377                         if (cmd->len & F_NOT)
4378                                 errx(EX_USAGE, "double \"not\" not allowed\n");
4379                         cmd->len = F_NOT;
4380                         break;
4381
4382                 case TOK_OR:
4383                         if (open_par == 0 || prev == NULL)
4384                                 errx(EX_USAGE, "invalid \"or\" block\n");
4385                         prev->len |= F_OR;
4386                         break;
4387
4388                 case TOK_STARTBRACE:
4389                         if (open_par)
4390                                 errx(EX_USAGE, "+nested \"(\" not allowed\n");
4391                         open_par = 1;
4392                         break;
4393
4394                 case TOK_ENDBRACE:
4395                         if (!open_par)
4396                                 errx(EX_USAGE, "+missing \")\"\n");
4397                         open_par = 0;
4398                         prev = NULL;
4399                         break;
4400
4401                 case TOK_IN:
4402                         fill_cmd(cmd, O_IN, 0, 0);
4403                         break;
4404
4405                 case TOK_OUT:
4406                         cmd->len ^= F_NOT; /* toggle F_NOT */
4407                         fill_cmd(cmd, O_IN, 0, 0);
4408                         break;
4409
4410                 case TOK_DIVERTED:
4411                         fill_cmd(cmd, O_DIVERTED, 0, 3);
4412                         break;
4413
4414                 case TOK_DIVERTEDLOOPBACK:
4415                         fill_cmd(cmd, O_DIVERTED, 0, 1);
4416                         break;
4417
4418                 case TOK_DIVERTEDOUTPUT:
4419                         fill_cmd(cmd, O_DIVERTED, 0, 2);
4420                         break;
4421
4422                 case TOK_FRAG:
4423                         fill_cmd(cmd, O_FRAG, 0, 0);
4424                         break;
4425
4426                 case TOK_LAYER2:
4427                         fill_cmd(cmd, O_LAYER2, 0, 0);
4428                         break;
4429
4430                 case TOK_XMIT:
4431                 case TOK_RECV:
4432                 case TOK_VIA:
4433                         NEED1("recv, xmit, via require interface name"
4434                                 " or address");
4435                         fill_iface((ipfw_insn_if *)cmd, av[0], cblen, tstate);
4436                         av++;
4437                         if (F_LEN(cmd) == 0)    /* not a valid address */
4438                                 break;
4439                         if (i == TOK_XMIT)
4440                                 cmd->opcode = O_XMIT;
4441                         else if (i == TOK_RECV)
4442                                 cmd->opcode = O_RECV;
4443                         else if (i == TOK_VIA)
4444                                 cmd->opcode = O_VIA;
4445                         break;
4446
4447                 case TOK_ICMPTYPES:
4448                         NEED1("icmptypes requires list of types");
4449                         fill_icmptypes((ipfw_insn_u32 *)cmd, *av);
4450                         av++;
4451                         break;
4452
4453                 case TOK_ICMP6TYPES:
4454                         NEED1("icmptypes requires list of types");
4455                         fill_icmp6types((ipfw_insn_icmp6 *)cmd, *av, cblen);
4456                         av++;
4457                         break;
4458
4459                 case TOK_IPTTL:
4460                         NEED1("ipttl requires TTL");
4461                         if (strpbrk(*av, "-,")) {
4462                             if (!add_ports(cmd, *av, 0, O_IPTTL, cblen))
4463                                 errx(EX_DATAERR, "invalid ipttl %s", *av);
4464                         } else
4465                             fill_cmd(cmd, O_IPTTL, 0, strtoul(*av, NULL, 0));
4466                         av++;
4467                         break;
4468
4469                 case TOK_IPID:
4470                         NEED1("ipid requires id");
4471                         if (strpbrk(*av, "-,")) {
4472                             if (!add_ports(cmd, *av, 0, O_IPID, cblen))
4473                                 errx(EX_DATAERR, "invalid ipid %s", *av);
4474                         } else
4475                             fill_cmd(cmd, O_IPID, 0, strtoul(*av, NULL, 0));
4476                         av++;
4477                         break;
4478
4479                 case TOK_IPLEN:
4480                         NEED1("iplen requires length");
4481                         if (strpbrk(*av, "-,")) {
4482                             if (!add_ports(cmd, *av, 0, O_IPLEN, cblen))
4483                                 errx(EX_DATAERR, "invalid ip len %s", *av);
4484                         } else
4485                             fill_cmd(cmd, O_IPLEN, 0, strtoul(*av, NULL, 0));
4486                         av++;
4487                         break;
4488
4489                 case TOK_IPVER:
4490                         NEED1("ipver requires version");
4491                         fill_cmd(cmd, O_IPVER, 0, strtoul(*av, NULL, 0));
4492                         av++;
4493                         break;
4494
4495                 case TOK_IPPRECEDENCE:
4496                         NEED1("ipprecedence requires value");
4497                         fill_cmd(cmd, O_IPPRECEDENCE, 0,
4498                             (strtoul(*av, NULL, 0) & 7) << 5);
4499                         av++;
4500                         break;
4501
4502                 case TOK_DSCP:
4503                         NEED1("missing DSCP code");
4504                         fill_dscp(cmd, *av, cblen);
4505                         av++;
4506                         break;
4507
4508                 case TOK_IPOPTS:
4509                         NEED1("missing argument for ipoptions");
4510                         fill_flags_cmd(cmd, O_IPOPT, f_ipopts, *av);
4511                         av++;
4512                         break;
4513
4514                 case TOK_IPTOS:
4515                         NEED1("missing argument for iptos");
4516                         fill_flags_cmd(cmd, O_IPTOS, f_iptos, *av);
4517                         av++;
4518                         break;
4519
4520                 case TOK_UID:
4521                         NEED1("uid requires argument");
4522                     {
4523                         char *end;
4524                         uid_t uid;
4525                         struct passwd *pwd;
4526
4527                         cmd->opcode = O_UID;
4528                         uid = strtoul(*av, &end, 0);
4529                         pwd = (*end == '\0') ? getpwuid(uid) : getpwnam(*av);
4530                         if (pwd == NULL)
4531                                 errx(EX_DATAERR, "uid \"%s\" nonexistent", *av);
4532                         cmd32->d[0] = pwd->pw_uid;
4533                         cmd->len |= F_INSN_SIZE(ipfw_insn_u32);
4534                         av++;
4535                     }
4536                         break;
4537
4538                 case TOK_GID:
4539                         NEED1("gid requires argument");
4540                     {
4541                         char *end;
4542                         gid_t gid;
4543                         struct group *grp;
4544
4545                         cmd->opcode = O_GID;
4546                         gid = strtoul(*av, &end, 0);
4547                         grp = (*end == '\0') ? getgrgid(gid) : getgrnam(*av);
4548                         if (grp == NULL)
4549                                 errx(EX_DATAERR, "gid \"%s\" nonexistent", *av);
4550                         cmd32->d[0] = grp->gr_gid;
4551                         cmd->len |= F_INSN_SIZE(ipfw_insn_u32);
4552                         av++;
4553                     }
4554                         break;
4555
4556                 case TOK_JAIL:
4557                         NEED1("jail requires argument");
4558                     {
4559                         char *end;
4560                         int jid;
4561
4562                         cmd->opcode = O_JAIL;
4563                         jid = (int)strtol(*av, &end, 0);
4564                         if (jid < 0 || *end != '\0')
4565                                 errx(EX_DATAERR, "jail requires prison ID");
4566                         cmd32->d[0] = (uint32_t)jid;
4567                         cmd->len |= F_INSN_SIZE(ipfw_insn_u32);
4568                         av++;
4569                     }
4570                         break;
4571
4572                 case TOK_ESTAB:
4573                         fill_cmd(cmd, O_ESTAB, 0, 0);
4574                         break;
4575
4576                 case TOK_SETUP:
4577                         fill_cmd(cmd, O_TCPFLAGS, 0,
4578                                 (TH_SYN) | ( (TH_ACK) & 0xff) <<8 );
4579                         break;
4580
4581                 case TOK_TCPDATALEN:
4582                         NEED1("tcpdatalen requires length");
4583                         if (strpbrk(*av, "-,")) {
4584                             if (!add_ports(cmd, *av, 0, O_TCPDATALEN, cblen))
4585                                 errx(EX_DATAERR, "invalid tcpdata len %s", *av);
4586                         } else
4587                             fill_cmd(cmd, O_TCPDATALEN, 0,
4588                                     strtoul(*av, NULL, 0));
4589                         av++;
4590                         break;
4591
4592                 case TOK_TCPOPTS:
4593                         NEED1("missing argument for tcpoptions");
4594                         fill_flags_cmd(cmd, O_TCPOPTS, f_tcpopts, *av);
4595                         av++;
4596                         break;
4597
4598                 case TOK_TCPSEQ:
4599                 case TOK_TCPACK:
4600                         NEED1("tcpseq/tcpack requires argument");
4601                         cmd->len = F_INSN_SIZE(ipfw_insn_u32);
4602                         cmd->opcode = (i == TOK_TCPSEQ) ? O_TCPSEQ : O_TCPACK;
4603                         cmd32->d[0] = htonl(strtoul(*av, NULL, 0));
4604                         av++;
4605                         break;
4606
4607                 case TOK_TCPWIN:
4608                         NEED1("tcpwin requires length");
4609                         if (strpbrk(*av, "-,")) {
4610                             if (!add_ports(cmd, *av, 0, O_TCPWIN, cblen))
4611                                 errx(EX_DATAERR, "invalid tcpwin len %s", *av);
4612                         } else
4613                             fill_cmd(cmd, O_TCPWIN, 0,
4614                                     strtoul(*av, NULL, 0));
4615                         av++;
4616                         break;
4617
4618                 case TOK_TCPFLAGS:
4619                         NEED1("missing argument for tcpflags");
4620                         cmd->opcode = O_TCPFLAGS;
4621                         fill_flags_cmd(cmd, O_TCPFLAGS, f_tcpflags, *av);
4622                         av++;
4623                         break;
4624
4625                 case TOK_KEEPSTATE: {
4626                         uint16_t uidx;
4627
4628                         if (open_par)
4629                                 errx(EX_USAGE, "keep-state cannot be part "
4630                                     "of an or block");
4631                         if (have_state)
4632                                 errx(EX_USAGE, "only one of keep-state "
4633                                         "and limit is allowed");
4634                         if (*av != NULL && *av[0] == ':') {
4635                                 if (state_check_name(*av + 1) != 0)
4636                                         errx(EX_DATAERR,
4637                                             "Invalid state name %s", *av);
4638                                 uidx = pack_object(tstate, *av + 1,
4639                                     IPFW_TLV_STATE_NAME);
4640                                 av++;
4641                         } else
4642                                 uidx = pack_object(tstate, default_state_name,
4643                                     IPFW_TLV_STATE_NAME);
4644                         have_state = cmd;
4645                         fill_cmd(cmd, O_KEEP_STATE, 0, uidx);
4646                         break;
4647                 }
4648
4649                 case TOK_LIMIT: {
4650                         ipfw_insn_limit *c = (ipfw_insn_limit *)cmd;
4651                         int val;
4652
4653                         if (open_par)
4654                                 errx(EX_USAGE,
4655                                     "limit cannot be part of an or block");
4656                         if (have_state)
4657                                 errx(EX_USAGE, "only one of keep-state and "
4658                                     "limit is allowed");
4659                         have_state = cmd;
4660
4661                         cmd->len = F_INSN_SIZE(ipfw_insn_limit);
4662                         CHECK_CMDLEN;
4663                         cmd->opcode = O_LIMIT;
4664                         c->limit_mask = c->conn_limit = 0;
4665
4666                         while ( av[0] != NULL ) {
4667                                 if ((val = match_token(limit_masks, *av)) <= 0)
4668                                         break;
4669                                 c->limit_mask |= val;
4670                                 av++;
4671                         }
4672
4673                         if (c->limit_mask == 0)
4674                                 errx(EX_USAGE, "limit: missing limit mask");
4675
4676                         GET_UINT_ARG(c->conn_limit, IPFW_ARG_MIN, IPFW_ARG_MAX,
4677                             TOK_LIMIT, rule_options);
4678                         av++;
4679
4680                         if (*av != NULL && *av[0] == ':') {
4681                                 if (state_check_name(*av + 1) != 0)
4682                                         errx(EX_DATAERR,
4683                                             "Invalid state name %s", *av);
4684                                 cmd->arg1 = pack_object(tstate, *av + 1,
4685                                     IPFW_TLV_STATE_NAME);
4686                                 av++;
4687                         } else
4688                                 cmd->arg1 = pack_object(tstate,
4689                                     default_state_name, IPFW_TLV_STATE_NAME);
4690                         break;
4691                 }
4692
4693                 case TOK_PROTO:
4694                         NEED1("missing protocol");
4695                         if (add_proto(cmd, *av, &proto)) {
4696                                 av++;
4697                         } else
4698                                 errx(EX_DATAERR, "invalid protocol ``%s''",
4699                                     *av);
4700                         break;
4701
4702                 case TOK_SRCIP:
4703                         NEED1("missing source IP");
4704                         if (add_srcip(cmd, *av, cblen, tstate)) {
4705                                 av++;
4706                         }
4707                         break;
4708
4709                 case TOK_DSTIP:
4710                         NEED1("missing destination IP");
4711                         if (add_dstip(cmd, *av, cblen, tstate)) {
4712                                 av++;
4713                         }
4714                         break;
4715
4716                 case TOK_SRCIP6:
4717                         NEED1("missing source IP6");
4718                         if (add_srcip6(cmd, *av, cblen, tstate)) {
4719                                 av++;
4720                         }
4721                         break;
4722
4723                 case TOK_DSTIP6:
4724                         NEED1("missing destination IP6");
4725                         if (add_dstip6(cmd, *av, cblen, tstate)) {
4726                                 av++;
4727                         }
4728                         break;
4729
4730                 case TOK_SRCPORT:
4731                         NEED1("missing source port");
4732                         if (_substrcmp(*av, "any") == 0 ||
4733                             add_ports(cmd, *av, proto, O_IP_SRCPORT, cblen)) {
4734                                 av++;
4735                         } else
4736                                 errx(EX_DATAERR, "invalid source port %s", *av);
4737                         break;
4738
4739                 case TOK_DSTPORT:
4740                         NEED1("missing destination port");
4741                         if (_substrcmp(*av, "any") == 0 ||
4742                             add_ports(cmd, *av, proto, O_IP_DSTPORT, cblen)) {
4743                                 av++;
4744                         } else
4745                                 errx(EX_DATAERR, "invalid destination port %s",
4746                                     *av);
4747                         break;
4748
4749                 case TOK_MAC:
4750                         if (add_mac(cmd, av, cblen))
4751                                 av += 2;
4752                         break;
4753
4754                 case TOK_MACTYPE:
4755                         NEED1("missing mac type");
4756                         if (!add_mactype(cmd, *av, cblen))
4757                                 errx(EX_DATAERR, "invalid mac type %s", *av);
4758                         av++;
4759                         break;
4760
4761                 case TOK_VERREVPATH:
4762                         fill_cmd(cmd, O_VERREVPATH, 0, 0);
4763                         break;
4764
4765                 case TOK_VERSRCREACH:
4766                         fill_cmd(cmd, O_VERSRCREACH, 0, 0);
4767                         break;
4768
4769                 case TOK_ANTISPOOF:
4770                         fill_cmd(cmd, O_ANTISPOOF, 0, 0);
4771                         break;
4772
4773                 case TOK_IPSEC:
4774                         fill_cmd(cmd, O_IPSEC, 0, 0);
4775                         break;
4776
4777                 case TOK_IPV6:
4778                         fill_cmd(cmd, O_IP6, 0, 0);
4779                         break;
4780
4781                 case TOK_IPV4:
4782                         fill_cmd(cmd, O_IP4, 0, 0);
4783                         break;
4784
4785                 case TOK_EXT6HDR:
4786                         fill_ext6hdr( cmd, *av );
4787                         av++;
4788                         break;
4789
4790                 case TOK_FLOWID:
4791                         if (proto != IPPROTO_IPV6 )
4792                                 errx( EX_USAGE, "flow-id filter is active "
4793                                     "only for ipv6 protocol\n");
4794                         fill_flow6( (ipfw_insn_u32 *) cmd, *av, cblen);
4795                         av++;
4796                         break;
4797
4798                 case TOK_COMMENT:
4799                         fill_comment(cmd, av, cblen);
4800                         av[0]=NULL;
4801                         break;
4802
4803                 case TOK_TAGGED:
4804                         if (av[0] && strpbrk(*av, "-,")) {
4805                                 if (!add_ports(cmd, *av, 0, O_TAGGED, cblen))
4806                                         errx(EX_DATAERR, "tagged: invalid tag"
4807                                             " list: %s", *av);
4808                         }
4809                         else {
4810                                 uint16_t tag;
4811
4812                                 GET_UINT_ARG(tag, IPFW_ARG_MIN, IPFW_ARG_MAX,
4813                                     TOK_TAGGED, rule_options);
4814                                 fill_cmd(cmd, O_TAGGED, 0, tag);
4815                         }
4816                         av++;
4817                         break;
4818
4819                 case TOK_FIB:
4820                         NEED1("fib requires fib number");
4821                         fill_cmd(cmd, O_FIB, 0, strtoul(*av, NULL, 0));
4822                         av++;
4823                         break;
4824                 case TOK_SOCKARG:
4825                         fill_cmd(cmd, O_SOCKARG, 0, 0);
4826                         break;
4827
4828                 case TOK_LOOKUP: {
4829                         ipfw_insn_u32 *c = (ipfw_insn_u32 *)cmd;
4830                         int j;
4831
4832                         if (!av[0] || !av[1])
4833                                 errx(EX_USAGE, "format: lookup argument tablenum");
4834                         cmd->opcode = O_IP_DST_LOOKUP;
4835                         cmd->len |= F_INSN_SIZE(ipfw_insn) + 2;
4836                         i = match_token(rule_options, *av);
4837                         for (j = 0; lookup_key[j] >= 0 ; j++) {
4838                                 if (i == lookup_key[j])
4839                                         break;
4840                         }
4841                         if (lookup_key[j] <= 0)
4842                                 errx(EX_USAGE, "format: cannot lookup on %s", *av);
4843                         __PAST_END(c->d, 1) = j; // i converted to option
4844                         av++;
4845
4846                         if ((j = pack_table(tstate, *av)) == 0)
4847                                 errx(EX_DATAERR, "Invalid table name: %s", *av);
4848
4849                         cmd->arg1 = j;
4850                         av++;
4851                     }
4852                         break;
4853                 case TOK_FLOW:
4854                         NEED1("missing table name");
4855                         if (strncmp(*av, "table(", 6) != 0)
4856                                 errx(EX_DATAERR,
4857                                     "enclose table name into \"table()\"");
4858                         fill_table(cmd, *av, O_IP_FLOW_LOOKUP, tstate);
4859                         av++;
4860                         break;
4861
4862                 default:
4863                         errx(EX_USAGE, "unrecognised option [%d] %s\n", i, s);
4864                 }
4865                 if (F_LEN(cmd) > 0) {   /* prepare to advance */
4866                         prev = cmd;
4867                         cmd = next_cmd(cmd, &cblen);
4868                 }
4869         }
4870
4871 done:
4872         /*
4873          * Now copy stuff into the rule.
4874          * If we have a keep-state option, the first instruction
4875          * must be a PROBE_STATE (which is generated here).
4876          * If we have a LOG option, it was stored as the first command,
4877          * and now must be moved to the top of the action part.
4878          */
4879         dst = (ipfw_insn *)rule->cmd;
4880
4881         /*
4882          * First thing to write into the command stream is the match probability.
4883          */
4884         if (match_prob != 1) { /* 1 means always match */
4885                 dst->opcode = O_PROB;
4886                 dst->len = 2;
4887                 *((int32_t *)(dst+1)) = (int32_t)(match_prob * 0x7fffffff);
4888                 dst += dst->len;
4889         }
4890
4891         /*
4892          * generate O_PROBE_STATE if necessary
4893          */
4894         if (have_state && have_state->opcode != O_CHECK_STATE) {
4895                 fill_cmd(dst, O_PROBE_STATE, 0, have_state->arg1);
4896                 dst = next_cmd(dst, &rblen);
4897         }
4898
4899         /* copy all commands but O_LOG, O_KEEP_STATE, O_LIMIT, O_ALTQ, O_TAG */
4900         for (src = (ipfw_insn *)cmdbuf; src != cmd; src += i) {
4901                 i = F_LEN(src);
4902                 CHECK_RBUFLEN(i);
4903
4904                 switch (src->opcode) {
4905                 case O_LOG:
4906                 case O_KEEP_STATE:
4907                 case O_LIMIT:
4908                 case O_ALTQ:
4909                 case O_TAG:
4910                         break;
4911                 default:
4912                         bcopy(src, dst, i * sizeof(uint32_t));
4913                         dst += i;
4914                 }
4915         }
4916
4917         /*
4918          * put back the have_state command as last opcode
4919          */
4920         if (have_state && have_state->opcode != O_CHECK_STATE) {
4921                 i = F_LEN(have_state);
4922                 CHECK_RBUFLEN(i);
4923                 bcopy(have_state, dst, i * sizeof(uint32_t));
4924                 dst += i;
4925         }
4926         /*
4927          * start action section
4928          */
4929         rule->act_ofs = dst - rule->cmd;
4930
4931         /* put back O_LOG, O_ALTQ, O_TAG if necessary */
4932         if (have_log) {
4933                 i = F_LEN(have_log);
4934                 CHECK_RBUFLEN(i);
4935                 bcopy(have_log, dst, i * sizeof(uint32_t));
4936                 dst += i;
4937         }
4938         if (have_altq) {
4939                 i = F_LEN(have_altq);
4940                 CHECK_RBUFLEN(i);
4941                 bcopy(have_altq, dst, i * sizeof(uint32_t));
4942                 dst += i;
4943         }
4944         if (have_tag) {
4945                 i = F_LEN(have_tag);
4946                 CHECK_RBUFLEN(i);
4947                 bcopy(have_tag, dst, i * sizeof(uint32_t));
4948                 dst += i;
4949         }
4950
4951         /*
4952          * copy all other actions
4953          */
4954         for (src = (ipfw_insn *)actbuf; src != action; src += i) {
4955                 i = F_LEN(src);
4956                 CHECK_RBUFLEN(i);
4957                 bcopy(src, dst, i * sizeof(uint32_t));
4958                 dst += i;
4959         }
4960
4961         rule->cmd_len = (uint32_t *)dst - (uint32_t *)(rule->cmd);
4962         *rbufsize = (char *)dst - (char *)rule;
4963 }
4964
4965 static int
4966 compare_ntlv(const void *_a, const void *_b)
4967 {
4968         ipfw_obj_ntlv *a, *b;
4969
4970         a = (ipfw_obj_ntlv *)_a;
4971         b = (ipfw_obj_ntlv *)_b;
4972
4973         if (a->set < b->set)
4974                 return (-1);
4975         else if (a->set > b->set)
4976                 return (1);
4977
4978         if (a->idx < b->idx)
4979                 return (-1);
4980         else if (a->idx > b->idx)
4981                 return (1);
4982
4983         if (a->head.type < b->head.type)
4984                 return (-1);
4985         else if (a->head.type > b->head.type)
4986                 return (1);
4987
4988         return (0);
4989 }
4990
4991 /*
4992  * Provide kernel with sorted list of referenced objects
4993  */
4994 static void
4995 object_sort_ctlv(ipfw_obj_ctlv *ctlv)
4996 {
4997
4998         qsort(ctlv + 1, ctlv->count, ctlv->objsize, compare_ntlv);
4999 }
5000
5001 struct object_kt {
5002         uint16_t        uidx;
5003         uint16_t        type;
5004 };
5005 static int
5006 compare_object_kntlv(const void *k, const void *v)
5007 {
5008         ipfw_obj_ntlv *ntlv;
5009         struct object_kt key;
5010
5011         key = *((struct object_kt *)k);
5012         ntlv = (ipfw_obj_ntlv *)v;
5013
5014         if (key.uidx < ntlv->idx)
5015                 return (-1);
5016         else if (key.uidx > ntlv->idx)
5017                 return (1);
5018
5019         if (key.type < ntlv->head.type)
5020                 return (-1);
5021         else if (key.type > ntlv->head.type)
5022                 return (1);
5023
5024         return (0);
5025 }
5026
5027 /*
5028  * Finds object name in @ctlv by @idx and @type.
5029  * Uses the following facts:
5030  * 1) All TLVs are the same size
5031  * 2) Kernel implementation provides already sorted list.
5032  *
5033  * Returns table name or NULL.
5034  */
5035 static char *
5036 object_search_ctlv(ipfw_obj_ctlv *ctlv, uint16_t idx, uint16_t type)
5037 {
5038         ipfw_obj_ntlv *ntlv;
5039         struct object_kt key;
5040
5041         key.uidx = idx;
5042         key.type = type;
5043
5044         ntlv = bsearch(&key, (ctlv + 1), ctlv->count, ctlv->objsize,
5045             compare_object_kntlv);
5046
5047         if (ntlv != NULL)
5048                 return (ntlv->name);
5049
5050         return (NULL);
5051 }
5052
5053 static char *
5054 table_search_ctlv(ipfw_obj_ctlv *ctlv, uint16_t idx)
5055 {
5056
5057         return (object_search_ctlv(ctlv, idx, IPFW_TLV_TBL_NAME));
5058 }
5059
5060 /*
5061  * Adds one or more rules to ipfw chain.
5062  * Data layout:
5063  * Request:
5064  * [
5065  *   ip_fw3_opheader
5066  *   [ ipfw_obj_ctlv(IPFW_TLV_TBL_LIST) ipfw_obj_ntlv x N ] (optional *1)
5067  *   [ ipfw_obj_ctlv(IPFW_TLV_RULE_LIST) [ ip_fw_rule ip_fw_insn ] x N ] (*2) (*3)
5068  * ]
5069  * Reply:
5070  * [
5071  *   ip_fw3_opheader
5072  *   [ ipfw_obj_ctlv(IPFW_TLV_TBL_LIST) ipfw_obj_ntlv x N ] (optional)
5073  *   [ ipfw_obj_ctlv(IPFW_TLV_RULE_LIST) [ ip_fw_rule ip_fw_insn ] x N ]
5074  * ]
5075  *
5076  * Rules in reply are modified to store their actual ruleset number.
5077  *
5078  * (*1) TLVs inside IPFW_TLV_TBL_LIST needs to be sorted ascending
5079  * according to their idx field and there has to be no duplicates.
5080  * (*2) Numbered rules inside IPFW_TLV_RULE_LIST needs to be sorted ascending.
5081  * (*3) Each ip_fw structure needs to be aligned to u64 boundary.
5082  */
5083 void
5084 ipfw_add(char *av[])
5085 {
5086         uint32_t rulebuf[1024];
5087         int rbufsize, default_off, tlen, rlen;
5088         size_t sz;
5089         struct tidx ts;
5090         struct ip_fw_rule *rule;
5091         caddr_t tbuf;
5092         ip_fw3_opheader *op3;
5093         ipfw_obj_ctlv *ctlv, *tstate;
5094
5095         rbufsize = sizeof(rulebuf);
5096         memset(rulebuf, 0, rbufsize);
5097         memset(&ts, 0, sizeof(ts));
5098
5099         /* Optimize case with no tables */
5100         default_off = sizeof(ipfw_obj_ctlv) + sizeof(ip_fw3_opheader);
5101         op3 = (ip_fw3_opheader *)rulebuf;
5102         ctlv = (ipfw_obj_ctlv *)(op3 + 1);
5103         rule = (struct ip_fw_rule *)(ctlv + 1);
5104         rbufsize -= default_off;
5105
5106         compile_rule(av, (uint32_t *)rule, &rbufsize, &ts);
5107         /* Align rule size to u64 boundary */
5108         rlen = roundup2(rbufsize, sizeof(uint64_t));
5109
5110         tbuf = NULL;
5111         sz = 0;
5112         tstate = NULL;
5113         if (ts.count != 0) {
5114                 /* Some tables. We have to alloc more data */
5115                 tlen = ts.count * sizeof(ipfw_obj_ntlv);
5116                 sz = default_off + sizeof(ipfw_obj_ctlv) + tlen + rlen;
5117
5118                 if ((tbuf = calloc(1, sz)) == NULL)
5119                         err(EX_UNAVAILABLE, "malloc() failed for IP_FW_ADD");
5120                 op3 = (ip_fw3_opheader *)tbuf;
5121                 /* Tables first */
5122                 ctlv = (ipfw_obj_ctlv *)(op3 + 1);
5123                 ctlv->head.type = IPFW_TLV_TBLNAME_LIST;
5124                 ctlv->head.length = sizeof(ipfw_obj_ctlv) + tlen;
5125                 ctlv->count = ts.count;
5126                 ctlv->objsize = sizeof(ipfw_obj_ntlv);
5127                 memcpy(ctlv + 1, ts.idx, tlen);
5128                 object_sort_ctlv(ctlv);
5129                 tstate = ctlv;
5130                 /* Rule next */
5131                 ctlv = (ipfw_obj_ctlv *)((caddr_t)ctlv + ctlv->head.length);
5132                 ctlv->head.type = IPFW_TLV_RULE_LIST;
5133                 ctlv->head.length = sizeof(ipfw_obj_ctlv) + rlen;
5134                 ctlv->count = 1;
5135                 memcpy(ctlv + 1, rule, rbufsize);
5136         } else {
5137                 /* Simply add header */
5138                 sz = rlen + default_off;
5139                 memset(ctlv, 0, sizeof(*ctlv));
5140                 ctlv->head.type = IPFW_TLV_RULE_LIST;
5141                 ctlv->head.length = sizeof(ipfw_obj_ctlv) + rlen;
5142                 ctlv->count = 1;
5143         }
5144
5145         if (do_get3(IP_FW_XADD, op3, &sz) != 0)
5146                 err(EX_UNAVAILABLE, "getsockopt(%s)", "IP_FW_XADD");
5147
5148         if (!co.do_quiet) {
5149                 struct format_opts sfo;
5150                 struct buf_pr bp;
5151                 memset(&sfo, 0, sizeof(sfo));
5152                 sfo.tstate = tstate;
5153                 sfo.set_mask = (uint32_t)(-1);
5154                 bp_alloc(&bp, 4096);
5155                 show_static_rule(&co, &sfo, &bp, rule, NULL);
5156                 printf("%s", bp.buf);
5157                 bp_free(&bp);
5158         }
5159
5160         if (tbuf != NULL)
5161                 free(tbuf);
5162
5163         if (ts.idx != NULL)
5164                 free(ts.idx);
5165 }
5166
5167 /*
5168  * clear the counters or the log counters.
5169  * optname has the following values:
5170  *  0 (zero both counters and logging)
5171  *  1 (zero logging only)
5172  */
5173 void
5174 ipfw_zero(int ac, char *av[], int optname)
5175 {
5176         ipfw_range_tlv rt;
5177         char const *errstr;
5178         char const *name = optname ? "RESETLOG" : "ZERO";
5179         uint32_t arg;
5180         int failed = EX_OK;
5181
5182         optname = optname ? IP_FW_XRESETLOG : IP_FW_XZERO;
5183         av++; ac--;
5184
5185         if (ac == 0) {
5186                 /* clear all entries */
5187                 memset(&rt, 0, sizeof(rt));
5188                 rt.flags = IPFW_RCFLAG_ALL;
5189                 if (do_range_cmd(optname, &rt) < 0)
5190                         err(EX_UNAVAILABLE, "setsockopt(IP_FW_X%s)", name);
5191                 if (!co.do_quiet)
5192                         printf("%s.\n", optname == IP_FW_XZERO ?
5193                             "Accounting cleared":"Logging counts reset");
5194
5195                 return;
5196         }
5197
5198         while (ac) {
5199                 /* Rule number */
5200                 if (isdigit(**av)) {
5201                         arg = strtonum(*av, 0, 0xffff, &errstr);
5202                         if (errstr)
5203                                 errx(EX_DATAERR,
5204                                     "invalid rule number %s\n", *av);
5205                         memset(&rt, 0, sizeof(rt));
5206                         rt.start_rule = arg;
5207                         rt.end_rule = arg;
5208                         rt.flags |= IPFW_RCFLAG_RANGE;
5209                         if (co.use_set != 0) {
5210                                 rt.set = co.use_set - 1;
5211                                 rt.flags |= IPFW_RCFLAG_SET;
5212                         }
5213                         if (do_range_cmd(optname, &rt) != 0) {
5214                                 warn("rule %u: setsockopt(IP_FW_X%s)",
5215                                     arg, name);
5216                                 failed = EX_UNAVAILABLE;
5217                         } else if (rt.new_set == 0) {
5218                                 printf("Entry %d not found\n", arg);
5219                                 failed = EX_UNAVAILABLE;
5220                         } else if (!co.do_quiet)
5221                                 printf("Entry %d %s.\n", arg,
5222                                     optname == IP_FW_XZERO ?
5223                                         "cleared" : "logging count reset");
5224                 } else {
5225                         errx(EX_USAGE, "invalid rule number ``%s''", *av);
5226                 }
5227                 av++; ac--;
5228         }
5229         if (failed != EX_OK)
5230                 exit(failed);
5231 }
5232
5233 void
5234 ipfw_flush(int force)
5235 {
5236         ipfw_range_tlv rt;
5237
5238         if (!force && !co.do_quiet) { /* need to ask user */
5239                 int c;
5240
5241                 printf("Are you sure? [yn] ");
5242                 fflush(stdout);
5243                 do {
5244                         c = toupper(getc(stdin));
5245                         while (c != '\n' && getc(stdin) != '\n')
5246                                 if (feof(stdin))
5247                                         return; /* and do not flush */
5248                 } while (c != 'Y' && c != 'N');
5249                 printf("\n");
5250                 if (c == 'N')   /* user said no */
5251                         return;
5252         }
5253         if (co.do_pipe) {
5254                 dummynet_flush();
5255                 return;
5256         }
5257         /* `ipfw set N flush` - is the same that `ipfw delete set N` */
5258         memset(&rt, 0, sizeof(rt));
5259         if (co.use_set != 0) {
5260                 rt.set = co.use_set - 1;
5261                 rt.flags = IPFW_RCFLAG_SET;
5262         } else
5263                 rt.flags = IPFW_RCFLAG_ALL;
5264         if (do_range_cmd(IP_FW_XDEL, &rt) != 0)
5265                         err(EX_UNAVAILABLE, "setsockopt(IP_FW_XDEL)");
5266         if (!co.do_quiet)
5267                 printf("Flushed all %s.\n", co.do_pipe ? "pipes" : "rules");
5268 }
5269
5270 static struct _s_x intcmds[] = {
5271       { "talist",       TOK_TALIST },
5272       { "iflist",       TOK_IFLIST },
5273       { "olist",        TOK_OLIST },
5274       { "vlist",        TOK_VLIST },
5275       { NULL, 0 }
5276 };
5277
5278 static struct _s_x otypes[] = {
5279         { "EACTION",    IPFW_TLV_EACTION },
5280         { "DYNSTATE",   IPFW_TLV_STATE_NAME },
5281         { NULL, 0 }
5282 };
5283
5284 static const char*
5285 lookup_eaction_name(ipfw_obj_ntlv *ntlv, int cnt, uint16_t type)
5286 {
5287         const char *name;
5288         int i;
5289
5290         name = NULL;
5291         for (i = 0; i < cnt; i++) {
5292                 if (ntlv[i].head.type != IPFW_TLV_EACTION)
5293                         continue;
5294                 if (IPFW_TLV_EACTION_NAME(ntlv[i].idx) != type)
5295                         continue;
5296                 name = ntlv[i].name;
5297                 break;
5298         }
5299         return (name);
5300 }
5301
5302 static void
5303 ipfw_list_objects(int ac, char *av[])
5304 {
5305         ipfw_obj_lheader req, *olh;
5306         ipfw_obj_ntlv *ntlv;
5307         const char *name;
5308         size_t sz;
5309         int i;
5310
5311         memset(&req, 0, sizeof(req));
5312         sz = sizeof(req);
5313         if (do_get3(IP_FW_DUMP_SRVOBJECTS, &req.opheader, &sz) != 0)
5314                 if (errno != ENOMEM)
5315                         return;
5316
5317         sz = req.size;
5318         if ((olh = calloc(1, sz)) == NULL)
5319                 return;
5320
5321         olh->size = sz;
5322         if (do_get3(IP_FW_DUMP_SRVOBJECTS, &olh->opheader, &sz) != 0) {
5323                 free(olh);
5324                 return;
5325         }
5326
5327         if (olh->count > 0)
5328                 printf("Objects list:\n");
5329         else
5330                 printf("There are no objects\n");
5331         ntlv = (ipfw_obj_ntlv *)(olh + 1);
5332         for (i = 0; i < olh->count; i++) {
5333                 name = match_value(otypes, ntlv->head.type);
5334                 if (name == NULL)
5335                         name = lookup_eaction_name(
5336                             (ipfw_obj_ntlv *)(olh + 1), olh->count,
5337                             ntlv->head.type);
5338                 if (name == NULL)
5339                         printf(" kidx: %4d\ttype: %10d\tname: %s\n",
5340                             ntlv->idx, ntlv->head.type, ntlv->name);
5341                 else
5342                         printf(" kidx: %4d\ttype: %10s\tname: %s\n",
5343                             ntlv->idx, name, ntlv->name);
5344                 ntlv++;
5345         }
5346         free(olh);
5347 }
5348
5349 void
5350 ipfw_internal_handler(int ac, char *av[])
5351 {
5352         int tcmd;
5353
5354         ac--; av++;
5355         NEED1("internal cmd required");
5356
5357         if ((tcmd = match_token(intcmds, *av)) == -1)
5358                 errx(EX_USAGE, "invalid internal sub-cmd: %s", *av);
5359
5360         switch (tcmd) {
5361         case TOK_IFLIST:
5362                 ipfw_list_tifaces();
5363                 break;
5364         case TOK_TALIST:
5365                 ipfw_list_ta(ac, av);
5366                 break;
5367         case TOK_OLIST:
5368                 ipfw_list_objects(ac, av);
5369                 break;
5370         case TOK_VLIST:
5371                 ipfw_list_values(ac, av);
5372                 break;
5373         }
5374 }
5375
5376 static int
5377 ipfw_get_tracked_ifaces(ipfw_obj_lheader **polh)
5378 {
5379         ipfw_obj_lheader req, *olh;
5380         size_t sz;
5381
5382         memset(&req, 0, sizeof(req));
5383         sz = sizeof(req);
5384
5385         if (do_get3(IP_FW_XIFLIST, &req.opheader, &sz) != 0) {
5386                 if (errno != ENOMEM)
5387                         return (errno);
5388         }
5389
5390         sz = req.size;
5391         if ((olh = calloc(1, sz)) == NULL)
5392                 return (ENOMEM);
5393
5394         olh->size = sz;
5395         if (do_get3(IP_FW_XIFLIST, &olh->opheader, &sz) != 0) {
5396                 free(olh);
5397                 return (errno);
5398         }
5399
5400         *polh = olh;
5401         return (0);
5402 }
5403
5404 static int
5405 ifinfo_cmp(const void *a, const void *b)
5406 {
5407         ipfw_iface_info *ia, *ib;
5408
5409         ia = (ipfw_iface_info *)a;
5410         ib = (ipfw_iface_info *)b;
5411
5412         return (stringnum_cmp(ia->ifname, ib->ifname));
5413 }
5414
5415 /*
5416  * Retrieves table list from kernel,
5417  * optionally sorts it and calls requested function for each table.
5418  * Returns 0 on success.
5419  */
5420 static void
5421 ipfw_list_tifaces()
5422 {
5423         ipfw_obj_lheader *olh;
5424         ipfw_iface_info *info;
5425         int i, error;
5426
5427         if ((error = ipfw_get_tracked_ifaces(&olh)) != 0)
5428                 err(EX_OSERR, "Unable to request ipfw tracked interface list");
5429
5430
5431         qsort(olh + 1, olh->count, olh->objsize, ifinfo_cmp);
5432
5433         info = (ipfw_iface_info *)(olh + 1);
5434         for (i = 0; i < olh->count; i++) {
5435                 if (info->flags & IPFW_IFFLAG_RESOLVED)
5436                         printf("%s ifindex: %d refcount: %u changes: %u\n",
5437                             info->ifname, info->ifindex, info->refcnt,
5438                             info->gencnt);
5439                 else
5440                         printf("%s ifindex: unresolved refcount: %u changes: %u\n",
5441                             info->ifname, info->refcnt, info->gencnt);
5442                 info = (ipfw_iface_info *)((caddr_t)info + olh->objsize);
5443         }
5444
5445         free(olh);
5446 }
5447
5448
5449
5450