sbin/ipfw/ipfw2.c

   1 /*
   2  * Copyright (c) 2002-2003 Luigi Rizzo
   3  * Copyright (c) 1996 Alex Nash, Paul Traina, Poul-Henning Kamp
   4  * Copyright (c) 1994 Ugen J.S.Antsilevich
   5  *
   6  * Idea and grammar partially left from:
   7  * Copyright (c) 1993 Daniel Boulet
   8  *
   9  * Redistribution and use in source forms, with and without modification,
  10  * are permitted provided that this entire comment appears intact.
  11  *
  12  * Redistribution in binary form may occur without any restrictions.
  13  * Obviously, it would be nice if you gave credit where credit is due
  14  * but requiring it would be too onerous.
  15  *
  16  * This software is provided ``AS IS'' without any warranties of any kind.
  17  *
  18  * NEW command line interface for IP firewall facility
  19  *
  20  * $FreeBSD$
  21  */
  22
  23 #include <sys/types.h>
  24 #include <sys/param.h>
  25 #include <sys/socket.h>
  26 #include <sys/sockio.h>
  27 #include <sys/sysctl.h>
  28
  29 #include "ipfw2.h"
  30
  31 #include <ctype.h>
  32 #include <err.h>
  33 #include <errno.h>
  34 #include <grp.h>
  35 #include <netdb.h>
  36 #include <pwd.h>
  37 #include <stdio.h>
  38 #include <stdarg.h>
  39 #include <stdlib.h>
  40 #include <string.h>
  41 #include <sysexits.h>
  42 #include <time.h>       /* ctime */
  43 #include <timeconv.h>   /* _long_to_time */
  44 #include <unistd.h>
  45 #include <fcntl.h>
  46 #include <stddef.h>     /* offsetof */
  47
  48 #include <net/ethernet.h>
  49 #include <net/if.h>             /* only IFNAMSIZ */
  50 #include <netinet/in.h>
  51 #include <netinet/in_systm.h>   /* only n_short, n_long */
  52 #include <netinet/ip.h>
  53 #include <netinet/ip_icmp.h>
  54 #include <netinet/ip_fw.h>
  55 #include <netinet/tcp.h>
  56 #include <arpa/inet.h>
  57
  58 struct cmdline_opts co; /* global options */
  59
  60 struct format_opts {
  61         int bcwidth;
  62         int pcwidth;
  63         int show_counters;
  64         int show_time;          /* show timestamp */
  65         uint32_t set_mask;      /* enabled sets mask */
  66         uint32_t flags;         /* request flags */
  67         uint32_t first;         /* first rule to request */
  68         uint32_t last;          /* last rule to request */
  69         uint32_t dcnt;          /* number of dynamic states */
  70         ipfw_obj_ctlv *tstate;  /* table state data */
  71 };
  72
  73 int resvd_set_number = RESVD_SET;
  74
  75 int ipfw_socket = -1;
  76
  77 #define CHECK_LENGTH(v, len) do {                               \
  78         if ((v) < (len))                                        \
  79                 errx(EX_DATAERR, "Rule too long");              \
  80         } while (0)
  81 /*
  82  * Check if we have enough space in cmd buffer. Note that since
  83  * first 8? u32 words are reserved by reserved header, full cmd
  84  * buffer can't be used, so we need to protect from buffer overrun
  85  * only. At the beginning, cblen is less than actual buffer size by
  86  * size of ipfw_insn_u32 instruction + 1 u32 work. This eliminates need
  87  * for checking small instructions fitting in given range.
  88  * We also (ab)use the fact that ipfw_insn is always the first field
  89  * for any custom instruction.
  90  */
  91 #define CHECK_CMDLEN    CHECK_LENGTH(cblen, F_LEN((ipfw_insn *)cmd))
  92
  93 #define GET_UINT_ARG(arg, min, max, tok, s_x) do {                      \
  94         if (!av[0])                                                     \
  95                 errx(EX_USAGE, "%s: missing argument", match_value(s_x, tok)); \
  96         if (_substrcmp(*av, "tablearg") == 0) {                         \
  97                 arg = IP_FW_TARG;                                       \
  98                 break;                                                  \
  99         }                                                               \
 100                                                                         \
 101         {                                                               \
 102         long _xval;                                                     \
 103         char *end;                                                      \
 104                                                                         \
 105         _xval = strtol(*av, &end, 10);                                  \
 106                                                                         \
 107         if (!isdigit(**av) || *end != '\0' || (_xval == 0 && errno == EINVAL)) \
 108                 errx(EX_DATAERR, "%s: invalid argument: %s",            \
 109                     match_value(s_x, tok), *av);                        \
 110                                                                         \
 111         if (errno == ERANGE || _xval < min || _xval > max)              \
 112                 errx(EX_DATAERR, "%s: argument is out of range (%u..%u): %s", \
 113                     match_value(s_x, tok), min, max, *av);              \
 114                                                                         \
 115         if (_xval == IP_FW_TARG)                                        \
 116                 errx(EX_DATAERR, "%s: illegal argument value: %s",      \
 117                     match_value(s_x, tok), *av);                        \
 118         arg = _xval;                                                    \
 119         }                                                               \
 120 } while (0)
 121
 122 static struct _s_x f_tcpflags[] = {
 123         { "syn", TH_SYN },
 124         { "fin", TH_FIN },
 125         { "ack", TH_ACK },
 126         { "psh", TH_PUSH },
 127         { "rst", TH_RST },
 128         { "urg", TH_URG },
 129         { "tcp flag", 0 },
 130         { NULL, 0 }
 131 };
 132
 133 static struct _s_x f_tcpopts[] = {
 134         { "mss",        IP_FW_TCPOPT_MSS },
 135         { "maxseg",     IP_FW_TCPOPT_MSS },
 136         { "window",     IP_FW_TCPOPT_WINDOW },
 137         { "sack",       IP_FW_TCPOPT_SACK },
 138         { "ts",         IP_FW_TCPOPT_TS },
 139         { "timestamp",  IP_FW_TCPOPT_TS },
 140         { "cc",         IP_FW_TCPOPT_CC },
 141         { "tcp option", 0 },
 142         { NULL, 0 }
 143 };
 144
 145 /*
 146  * IP options span the range 0 to 255 so we need to remap them
 147  * (though in fact only the low 5 bits are significant).
 148  */
 149 static struct _s_x f_ipopts[] = {
 150         { "ssrr",       IP_FW_IPOPT_SSRR},
 151         { "lsrr",       IP_FW_IPOPT_LSRR},
 152         { "rr",         IP_FW_IPOPT_RR},
 153         { "ts",         IP_FW_IPOPT_TS},
 154         { "ip option",  0 },
 155         { NULL, 0 }
 156 };
 157
 158 static struct _s_x f_iptos[] = {
 159         { "lowdelay",   IPTOS_LOWDELAY},
 160         { "throughput", IPTOS_THROUGHPUT},
 161         { "reliability", IPTOS_RELIABILITY},
 162         { "mincost",    IPTOS_MINCOST},
 163         { "congestion", IPTOS_ECN_CE},
 164         { "ecntransport", IPTOS_ECN_ECT0},
 165         { "ip tos option", 0},
 166         { NULL, 0 }
 167 };
 168
 169 struct _s_x f_ipdscp[] = {
 170         { "af11", IPTOS_DSCP_AF11 >> 2 },       /* 001010 */
 171         { "af12", IPTOS_DSCP_AF12 >> 2 },       /* 001100 */
 172         { "af13", IPTOS_DSCP_AF13 >> 2 },       /* 001110 */
 173         { "af21", IPTOS_DSCP_AF21 >> 2 },       /* 010010 */
 174         { "af22", IPTOS_DSCP_AF22 >> 2 },       /* 010100 */
 175         { "af23", IPTOS_DSCP_AF23 >> 2 },       /* 010110 */
 176         { "af31", IPTOS_DSCP_AF31 >> 2 },       /* 011010 */
 177         { "af32", IPTOS_DSCP_AF32 >> 2 },       /* 011100 */
 178         { "af33", IPTOS_DSCP_AF33 >> 2 },       /* 011110 */
 179         { "af41", IPTOS_DSCP_AF41 >> 2 },       /* 100010 */
 180         { "af42", IPTOS_DSCP_AF42 >> 2 },       /* 100100 */
 181         { "af43", IPTOS_DSCP_AF43 >> 2 },       /* 100110 */
 182         { "be", IPTOS_DSCP_CS0 >> 2 },  /* 000000 */
 183         { "ef", IPTOS_DSCP_EF >> 2 },   /* 101110 */
 184         { "cs0", IPTOS_DSCP_CS0 >> 2 }, /* 000000 */
 185         { "cs1", IPTOS_DSCP_CS1 >> 2 }, /* 001000 */
 186         { "cs2", IPTOS_DSCP_CS2 >> 2 }, /* 010000 */
 187         { "cs3", IPTOS_DSCP_CS3 >> 2 }, /* 011000 */
 188         { "cs4", IPTOS_DSCP_CS4 >> 2 }, /* 100000 */
 189         { "cs5", IPTOS_DSCP_CS5 >> 2 }, /* 101000 */
 190         { "cs6", IPTOS_DSCP_CS6 >> 2 }, /* 110000 */
 191         { "cs7", IPTOS_DSCP_CS7 >> 2 }, /* 100000 */
 192         { NULL, 0 }
 193 };
 194
 195 static struct _s_x limit_masks[] = {
 196         {"all",         DYN_SRC_ADDR|DYN_SRC_PORT|DYN_DST_ADDR|DYN_DST_PORT},
 197         {"src-addr",    DYN_SRC_ADDR},
 198         {"src-port",    DYN_SRC_PORT},
 199         {"dst-addr",    DYN_DST_ADDR},
 200         {"dst-port",    DYN_DST_PORT},
 201         {NULL,          0}
 202 };
 203
 204 /*
 205  * we use IPPROTO_ETHERTYPE as a fake protocol id to call the print routines
 206  * This is only used in this code.
 207  */
 208 #define IPPROTO_ETHERTYPE       0x1000
 209 static struct _s_x ether_types[] = {
 210     /*
 211      * Note, we cannot use "-:&/" in the names because they are field
 212      * separators in the type specifications. Also, we use s = NULL as
 213      * end-delimiter, because a type of 0 can be legal.
 214      */
 215         { "ip",         0x0800 },
 216         { "ipv4",       0x0800 },
 217         { "ipv6",       0x86dd },
 218         { "arp",        0x0806 },
 219         { "rarp",       0x8035 },
 220         { "vlan",       0x8100 },
 221         { "loop",       0x9000 },
 222         { "trail",      0x1000 },
 223         { "at",         0x809b },
 224         { "atalk",      0x809b },
 225         { "aarp",       0x80f3 },
 226         { "pppoe_disc", 0x8863 },
 227         { "pppoe_sess", 0x8864 },
 228         { "ipx_8022",   0x00E0 },
 229         { "ipx_8023",   0x0000 },
 230         { "ipx_ii",     0x8137 },
 231         { "ipx_snap",   0x8137 },
 232         { "ipx",        0x8137 },
 233         { "ns",         0x0600 },
 234         { NULL,         0 }
 235 };
 236
 237 static struct _s_x rule_eactions[] = {
 238         { "nat64lsn",           TOK_NAT64LSN },
 239         { "nat64stl",           TOK_NAT64STL },
 240         { "nptv6",              TOK_NPTV6 },
 241         { NULL, 0 }     /* terminator */
 242 };
 243
 244 static struct _s_x rule_actions[] = {
 245         { "accept",             TOK_ACCEPT },
 246         { "pass",               TOK_ACCEPT },
 247         { "allow",              TOK_ACCEPT },
 248         { "permit",             TOK_ACCEPT },
 249         { "count",              TOK_COUNT },
 250         { "pipe",               TOK_PIPE },
 251         { "queue",              TOK_QUEUE },
 252         { "divert",             TOK_DIVERT },
 253         { "tee",                TOK_TEE },
 254         { "netgraph",           TOK_NETGRAPH },
 255         { "ngtee",              TOK_NGTEE },
 256         { "fwd",                TOK_FORWARD },
 257         { "forward",            TOK_FORWARD },
 258         { "skipto",             TOK_SKIPTO },
 259         { "deny",               TOK_DENY },
 260         { "drop",               TOK_DENY },
 261         { "reject",             TOK_REJECT },
 262         { "reset6",             TOK_RESET6 },
 263         { "reset",              TOK_RESET },
 264         { "unreach6",           TOK_UNREACH6 },
 265         { "unreach",            TOK_UNREACH },
 266         { "check-state",        TOK_CHECKSTATE },
 267         { "//",                 TOK_COMMENT },
 268         { "nat",                TOK_NAT },
 269         { "reass",              TOK_REASS },
 270         { "setfib",             TOK_SETFIB },
 271         { "setdscp",            TOK_SETDSCP },
 272         { "call",               TOK_CALL },
 273         { "return",             TOK_RETURN },
 274         { "eaction",            TOK_EACTION },
 275         { NULL, 0 }     /* terminator */
 276 };
 277
 278 static struct _s_x rule_action_params[] = {
 279         { "altq",               TOK_ALTQ },
 280         { "log",                TOK_LOG },
 281         { "tag",                TOK_TAG },
 282         { "untag",              TOK_UNTAG },
 283         { NULL, 0 }     /* terminator */
 284 };
 285
 286 /*
 287  * The 'lookup' instruction accepts one of the following arguments.
 288  * -1 is a terminator for the list.
 289  * Arguments are passed as v[1] in O_DST_LOOKUP options.
 290  */
 291 static int lookup_key[] = {
 292         TOK_DSTIP, TOK_SRCIP, TOK_DSTPORT, TOK_SRCPORT,
 293         TOK_UID, TOK_JAIL, TOK_DSCP, -1 };
 294
 295 static struct _s_x rule_options[] = {
 296         { "tagged",             TOK_TAGGED },
 297         { "uid",                TOK_UID },
 298         { "gid",                TOK_GID },
 299         { "jail",               TOK_JAIL },
 300         { "in",                 TOK_IN },
 301         { "limit",              TOK_LIMIT },
 302         { "keep-state",         TOK_KEEPSTATE },
 303         { "bridged",            TOK_LAYER2 },
 304         { "layer2",             TOK_LAYER2 },
 305         { "out",                TOK_OUT },
 306         { "diverted",           TOK_DIVERTED },
 307         { "diverted-loopback",  TOK_DIVERTEDLOOPBACK },
 308         { "diverted-output",    TOK_DIVERTEDOUTPUT },
 309         { "xmit",               TOK_XMIT },
 310         { "recv",               TOK_RECV },
 311         { "via",                TOK_VIA },
 312         { "fragment",           TOK_FRAG },
 313         { "frag",               TOK_FRAG },
 314         { "fib",                TOK_FIB },
 315         { "ipoptions",          TOK_IPOPTS },
 316         { "ipopts",             TOK_IPOPTS },
 317         { "iplen",              TOK_IPLEN },
 318         { "ipid",               TOK_IPID },
 319         { "ipprecedence",       TOK_IPPRECEDENCE },
 320         { "dscp",               TOK_DSCP },
 321         { "iptos",              TOK_IPTOS },
 322         { "ipttl",              TOK_IPTTL },
 323         { "ipversion",          TOK_IPVER },
 324         { "ipver",              TOK_IPVER },
 325         { "estab",              TOK_ESTAB },
 326         { "established",        TOK_ESTAB },
 327         { "setup",              TOK_SETUP },
 328         { "sockarg",            TOK_SOCKARG },
 329         { "tcpdatalen",         TOK_TCPDATALEN },
 330         { "tcpflags",           TOK_TCPFLAGS },
 331         { "tcpflgs",            TOK_TCPFLAGS },
 332         { "tcpoptions",         TOK_TCPOPTS },
 333         { "tcpopts",            TOK_TCPOPTS },
 334         { "tcpseq",             TOK_TCPSEQ },
 335         { "tcpack",             TOK_TCPACK },
 336         { "tcpwin",             TOK_TCPWIN },
 337         { "icmptype",           TOK_ICMPTYPES },
 338         { "icmptypes",          TOK_ICMPTYPES },
 339         { "dst-ip",             TOK_DSTIP },
 340         { "src-ip",             TOK_SRCIP },
 341         { "dst-port",           TOK_DSTPORT },
 342         { "src-port",           TOK_SRCPORT },
 343         { "proto",              TOK_PROTO },
 344         { "MAC",                TOK_MAC },
 345         { "mac",                TOK_MAC },
 346         { "mac-type",           TOK_MACTYPE },
 347         { "verrevpath",         TOK_VERREVPATH },
 348         { "versrcreach",        TOK_VERSRCREACH },
 349         { "antispoof",          TOK_ANTISPOOF },
 350         { "ipsec",              TOK_IPSEC },
 351         { "icmp6type",          TOK_ICMP6TYPES },
 352         { "icmp6types",         TOK_ICMP6TYPES },
 353         { "ext6hdr",            TOK_EXT6HDR},
 354         { "flow-id",            TOK_FLOWID},
 355         { "ipv6",               TOK_IPV6},
 356         { "ip6",                TOK_IPV6},
 357         { "ipv4",               TOK_IPV4},
 358         { "ip4",                TOK_IPV4},
 359         { "dst-ipv6",           TOK_DSTIP6},
 360         { "dst-ip6",            TOK_DSTIP6},
 361         { "src-ipv6",           TOK_SRCIP6},
 362         { "src-ip6",            TOK_SRCIP6},
 363         { "lookup",             TOK_LOOKUP},
 364         { "flow",               TOK_FLOW},
 365         { "//",                 TOK_COMMENT },
 366
 367         { "not",                TOK_NOT },              /* pseudo option */
 368         { "!", /* escape ? */   TOK_NOT },              /* pseudo option */
 369         { "or",                 TOK_OR },               /* pseudo option */
 370         { "|", /* escape */     TOK_OR },               /* pseudo option */
 371         { "{",                  TOK_STARTBRACE },       /* pseudo option */
 372         { "(",                  TOK_STARTBRACE },       /* pseudo option */
 373         { "}",                  TOK_ENDBRACE },         /* pseudo option */
 374         { ")",                  TOK_ENDBRACE },         /* pseudo option */
 375         { NULL, 0 }     /* terminator */
 376 };
 377
 378 void bprint_uint_arg(struct buf_pr *bp, const char *str, uint32_t arg);
 379 static int ipfw_get_config(struct cmdline_opts *co, struct format_opts *fo,
 380     ipfw_cfg_lheader **pcfg, size_t *psize);
 381 static int ipfw_show_config(struct cmdline_opts *co, struct format_opts *fo,
 382     ipfw_cfg_lheader *cfg, size_t sz, int ac, char **av);
 383 static void ipfw_list_tifaces(void);
 384
 385 struct tidx;
 386 static uint16_t pack_object(struct tidx *tstate, char *name, int otype);
 387 static uint16_t pack_table(struct tidx *tstate, char *name);
 388
 389 static char *table_search_ctlv(ipfw_obj_ctlv *ctlv, uint16_t idx);
 390 static void object_sort_ctlv(ipfw_obj_ctlv *ctlv);
 391 static char *object_search_ctlv(ipfw_obj_ctlv *ctlv, uint16_t idx,
 392     uint16_t type);
 393
 394 /*
 395  * Simple string buffer API.
 396  * Used to simplify buffer passing between function and for
 397  * transparent overrun handling.
 398  */
 399
 400 /*
 401  * Allocates new buffer of given size @sz.
 402  *
 403  * Returns 0 on success.
 404  */
 405 int
 406 bp_alloc(struct buf_pr *b, size_t size)
 407 {
 408         memset(b, 0, sizeof(struct buf_pr));
 409
 410         if ((b->buf = calloc(1, size)) == NULL)
 411                 return (ENOMEM);
 412
 413         b->ptr = b->buf;
 414         b->size = size;
 415         b->avail = b->size;
 416
 417         return (0);
 418 }
 419
 420 void
 421 bp_free(struct buf_pr *b)
 422 {
 423
 424         free(b->buf);
 425 }
 426
 427 /*
 428  * Flushes buffer so new writer start from beginning.
 429  */
 430 void
 431 bp_flush(struct buf_pr *b)
 432 {
 433
 434         b->ptr = b->buf;
 435         b->avail = b->size;
 436         b->buf[0] = '\0';
 437 }
 438
 439 /*
 440  * Print message specified by @format and args.
 441  * Automatically manage buffer space and transparently handle
 442  * buffer overruns.
 443  *
 444  * Returns number of bytes that should have been printed.
 445  */
 446 int
 447 bprintf(struct buf_pr *b, char *format, ...)
 448 {
 449         va_list args;
 450         int i;
 451
 452         va_start(args, format);
 453
 454         i = vsnprintf(b->ptr, b->avail, format, args);
 455         va_end(args);
 456
 457         if (i > b->avail || i < 0) {
 458                 /* Overflow or print error */
 459                 b->avail = 0;
 460         } else {
 461                 b->ptr += i;
 462                 b->avail -= i;
 463         }
 464
 465         b->needed += i;
 466
 467         return (i);
 468 }
 469
 470 /*
 471  * Special values printer for tablearg-aware opcodes.
 472  */
 473 void
 474 bprint_uint_arg(struct buf_pr *bp, const char *str, uint32_t arg)
 475 {
 476
 477         if (str != NULL)
 478                 bprintf(bp, "%s", str);
 479         if (arg == IP_FW_TARG)
 480                 bprintf(bp, "tablearg");
 481         else
 482                 bprintf(bp, "%u", arg);
 483 }
 484
 485 /*
 486  * Helper routine to print a possibly unaligned uint64_t on
 487  * various platform. If width > 0, print the value with
 488  * the desired width, followed by a space;
 489  * otherwise, return the required width.
 490  */
 491 int
 492 pr_u64(struct buf_pr *b, uint64_t *pd, int width)
 493 {
 494 #ifdef TCC
 495 #define U64_FMT "I64"
 496 #else
 497 #define U64_FMT "llu"
 498 #endif
 499         uint64_t u;
 500         unsigned long long d;
 501
 502         bcopy (pd, &u, sizeof(u));
 503         d = u;
 504         return (width > 0) ?
 505                 bprintf(b, "%*" U64_FMT " ", width, d) :
 506                 snprintf(NULL, 0, "%" U64_FMT, d) ;
 507 #undef U64_FMT
 508 }
 509
 510
 511 void *
 512 safe_calloc(size_t number, size_t size)
 513 {
 514         void *ret = calloc(number, size);
 515
 516         if (ret == NULL)
 517                 err(EX_OSERR, "calloc");
 518         return ret;
 519 }
 520
 521 void *
 522 safe_realloc(void *ptr, size_t size)
 523 {
 524         void *ret = realloc(ptr, size);
 525
 526         if (ret == NULL)
 527                 err(EX_OSERR, "realloc");
 528         return ret;
 529 }
 530
 531 /*
 532  * Compare things like interface or table names.
 533  */
 534 int
 535 stringnum_cmp(const char *a, const char *b)
 536 {
 537         int la, lb;
 538
 539         la = strlen(a);
 540         lb = strlen(b);
 541
 542         if (la > lb)
 543                 return (1);
 544         else if (la < lb)
 545                 return (-01);
 546
 547         return (strcmp(a, b));
 548 }
 549
 550
 551 /*
 552  * conditionally runs the command.
 553  * Selected options or negative -> getsockopt
 554  */
 555 int
 556 do_cmd(int optname, void *optval, uintptr_t optlen)
 557 {
 558         int i;
 559
 560         if (co.test_only)
 561                 return 0;
 562
 563         if (ipfw_socket == -1)
 564                 ipfw_socket = socket(AF_INET, SOCK_RAW, IPPROTO_RAW);
 565         if (ipfw_socket < 0)
 566                 err(EX_UNAVAILABLE, "socket");
 567
 568         if (optname == IP_FW_GET || optname == IP_DUMMYNET_GET ||
 569             optname == IP_FW_ADD || optname == IP_FW3 ||
 570             optname == IP_FW_NAT_GET_CONFIG ||
 571             optname < 0 ||
 572             optname == IP_FW_NAT_GET_LOG) {
 573                 if (optname < 0)
 574                         optname = -optname;
 575                 i = getsockopt(ipfw_socket, IPPROTO_IP, optname, optval,
 576                         (socklen_t *)optlen);
 577         } else {
 578                 i = setsockopt(ipfw_socket, IPPROTO_IP, optname, optval, optlen);
 579         }
 580         return i;
 581 }
 582
 583 /*
 584  * do_set3 - pass ipfw control cmd to kernel
 585  * @optname: option name
 586  * @optval: pointer to option data
 587  * @optlen: option length
 588  *
 589  * Assumes op3 header is already embedded.
 590  * Calls setsockopt() with IP_FW3 as kernel-visible opcode.
 591  * Returns 0 on success or errno otherwise.
 592  */
 593 int
 594 do_set3(int optname, ip_fw3_opheader *op3, size_t optlen)
 595 {
 596
 597         if (co.test_only)
 598                 return (0);
 599
 600         if (ipfw_socket == -1)
 601                 ipfw_socket = socket(AF_INET, SOCK_RAW, IPPROTO_RAW);
 602         if (ipfw_socket < 0)
 603                 err(EX_UNAVAILABLE, "socket");
 604
 605         op3->opcode = optname;
 606
 607         return (setsockopt(ipfw_socket, IPPROTO_IP, IP_FW3, op3, optlen));
 608 }
 609
 610 /*
 611  * do_get3 - pass ipfw control cmd to kernel
 612  * @optname: option name
 613  * @optval: pointer to option data
 614  * @optlen: pointer to option length
 615  *
 616  * Assumes op3 header is already embedded.
 617  * Calls getsockopt() with IP_FW3 as kernel-visible opcode.
 618  * Returns 0 on success or errno otherwise.
 619  */
 620 int
 621 do_get3(int optname, ip_fw3_opheader *op3, size_t *optlen)
 622 {
 623         int error;
 624         socklen_t len;
 625
 626         if (co.test_only)
 627                 return (0);
 628
 629         if (ipfw_socket == -1)
 630                 ipfw_socket = socket(AF_INET, SOCK_RAW, IPPROTO_RAW);
 631         if (ipfw_socket < 0)
 632                 err(EX_UNAVAILABLE, "socket");
 633
 634         op3->opcode = optname;
 635
 636         len = *optlen;
 637         error = getsockopt(ipfw_socket, IPPROTO_IP, IP_FW3, op3, &len);
 638         *optlen = len;
 639
 640         return (error);
 641 }
 642
 643 /**
 644  * match_token takes a table and a string, returns the value associated
 645  * with the string (-1 in case of failure).
 646  */
 647 int
 648 match_token(struct _s_x *table, const char *string)
 649 {
 650         struct _s_x *pt;
 651         uint i = strlen(string);
 652
 653         for (pt = table ; i && pt->s != NULL ; pt++)
 654                 if (strlen(pt->s) == i && !bcmp(string, pt->s, i))
 655                         return pt->x;
 656         return (-1);
 657 }
 658
 659 /**
 660  * match_token_relaxed takes a table and a string, returns the value associated
 661  * with the string for the best match.
 662  *
 663  * Returns:
 664  * value from @table for matched records
 665  * -1 for non-matched records
 666  * -2 if more than one records match @string.
 667  */
 668 int
 669 match_token_relaxed(struct _s_x *table, const char *string)
 670 {
 671         struct _s_x *pt, *m;
 672         int i, c;
 673
 674         i = strlen(string);
 675         c = 0;
 676
 677         for (pt = table ; i != 0 && pt->s != NULL ; pt++) {
 678                 if (strncmp(pt->s, string, i) != 0)
 679                         continue;
 680                 m = pt;
 681                 c++;
 682         }
 683
 684         if (c == 1)
 685                 return (m->x);
 686
 687         return (c > 0 ? -2: -1);
 688 }
 689
 690 int
 691 get_token(struct _s_x *table, const char *string, const char *errbase)
 692 {
 693         int tcmd;
 694
 695         if ((tcmd = match_token_relaxed(table, string)) < 0)
 696                 errx(EX_USAGE, "%s %s %s",
 697                     (tcmd == 0) ? "invalid" : "ambiguous", errbase, string);
 698
 699         return (tcmd);
 700 }
 701
 702 /**
 703  * match_value takes a table and a value, returns the string associated
 704  * with the value (NULL in case of failure).
 705  */
 706 char const *
 707 match_value(struct _s_x *p, int value)
 708 {
 709         for (; p->s != NULL; p++)
 710                 if (p->x == value)
 711                         return p->s;
 712         return NULL;
 713 }
 714
 715 size_t
 716 concat_tokens(char *buf, size_t bufsize, struct _s_x *table, char *delimiter)
 717 {
 718         struct _s_x *pt;
 719         int l;
 720         size_t sz;
 721
 722         for (sz = 0, pt = table ; pt->s != NULL; pt++) {
 723                 l = snprintf(buf + sz, bufsize - sz, "%s%s",
 724                     (sz == 0) ? "" : delimiter, pt->s);
 725                 sz += l;
 726                 bufsize += l;
 727                 if (sz > bufsize)
 728                         return (bufsize);
 729         }
 730
 731         return (sz);
 732 }
 733
 734 /*
 735  * helper function to process a set of flags and set bits in the
 736  * appropriate masks.
 737  */
 738 int
 739 fill_flags(struct _s_x *flags, char *p, char **e, uint32_t *set,
 740     uint32_t *clear)
 741 {
 742         char *q;        /* points to the separator */
 743         int val;
 744         uint32_t *which;        /* mask we are working on */
 745
 746         while (p && *p) {
 747                 if (*p == '!') {
 748                         p++;
 749                         which = clear;
 750                 } else
 751                         which = set;
 752                 q = strchr(p, ',');
 753                 if (q)
 754                         *q++ = '\0';
 755                 val = match_token(flags, p);
 756                 if (val <= 0) {
 757                         if (e != NULL)
 758                                 *e = p;
 759                         return (-1);
 760                 }
 761                 *which |= (uint32_t)val;
 762                 p = q;
 763         }
 764         return (0);
 765 }
 766
 767 void
 768 print_flags_buffer(char *buf, size_t sz, struct _s_x *list, uint32_t set)
 769 {
 770         char const *comma = "";
 771         int i, l;
 772
 773         for (i = 0; list[i].x != 0; i++) {
 774                 if ((set & list[i].x) == 0)
 775                         continue;
 776
 777                 set &= ~list[i].x;
 778                 l = snprintf(buf, sz, "%s%s", comma, list[i].s);
 779                 if (l >= sz)
 780                         return;
 781                 comma = ",";
 782                 buf += l;
 783                 sz -=l;
 784         }
 785 }
 786
 787 /*
 788  * _substrcmp takes two strings and returns 1 if they do not match,
 789  * and 0 if they match exactly or the first string is a sub-string
 790  * of the second.  A warning is printed to stderr in the case that the
 791  * first string is a sub-string of the second.
 792  *
 793  * This function will be removed in the future through the usual
 794  * deprecation process.
 795  */
 796 int
 797 _substrcmp(const char *str1, const char* str2)
 798 {
 799
 800         if (strncmp(str1, str2, strlen(str1)) != 0)
 801                 return 1;
 802
 803         if (strlen(str1) != strlen(str2))
 804                 warnx("DEPRECATED: '%s' matched '%s' as a sub-string",
 805                     str1, str2);
 806         return 0;
 807 }
 808
 809 /*
 810  * _substrcmp2 takes three strings and returns 1 if the first two do not match,
 811  * and 0 if they match exactly or the second string is a sub-string
 812  * of the first.  A warning is printed to stderr in the case that the
 813  * first string does not match the third.
 814  *
 815  * This function exists to warn about the bizarre construction
 816  * strncmp(str, "by", 2) which is used to allow people to use a shortcut
 817  * for "bytes".  The problem is that in addition to accepting "by",
 818  * "byt", "byte", and "bytes", it also excepts "by_rabid_dogs" and any
 819  * other string beginning with "by".
 820  *
 821  * This function will be removed in the future through the usual
 822  * deprecation process.
 823  */
 824 int
 825 _substrcmp2(const char *str1, const char* str2, const char* str3)
 826 {
 827
 828         if (strncmp(str1, str2, strlen(str2)) != 0)
 829                 return 1;
 830
 831         if (strcmp(str1, str3) != 0)
 832                 warnx("DEPRECATED: '%s' matched '%s'",
 833                     str1, str3);
 834         return 0;
 835 }
 836
 837 /*
 838  * prints one port, symbolic or numeric
 839  */
 840 static void
 841 print_port(struct buf_pr *bp, int proto, uint16_t port)
 842 {
 843
 844         if (proto == IPPROTO_ETHERTYPE) {
 845                 char const *s;
 846
 847                 if (co.do_resolv && (s = match_value(ether_types, port)) )
 848                         bprintf(bp, "%s", s);
 849                 else
 850                         bprintf(bp, "0x%04x", port);
 851         } else {
 852                 struct servent *se = NULL;
 853                 if (co.do_resolv) {
 854                         struct protoent *pe = getprotobynumber(proto);
 855
 856                         se = getservbyport(htons(port), pe ? pe->p_name : NULL);
 857                 }
 858                 if (se)
 859                         bprintf(bp, "%s", se->s_name);
 860                 else
 861                         bprintf(bp, "%d", port);
 862         }
 863 }
 864
 865 static struct _s_x _port_name[] = {
 866         {"dst-port",    O_IP_DSTPORT},
 867         {"src-port",    O_IP_SRCPORT},
 868         {"ipid",        O_IPID},
 869         {"iplen",       O_IPLEN},
 870         {"ipttl",       O_IPTTL},
 871         {"mac-type",    O_MAC_TYPE},
 872         {"tcpdatalen",  O_TCPDATALEN},
 873         {"tcpwin",      O_TCPWIN},
 874         {"tagged",      O_TAGGED},
 875         {NULL,          0}
 876 };
 877
 878 /*
 879  * Print the values in a list 16-bit items of the types above.
 880  * XXX todo: add support for mask.
 881  */
 882 static void
 883 print_newports(struct buf_pr *bp, ipfw_insn_u16 *cmd, int proto, int opcode)
 884 {
 885         uint16_t *p = cmd->ports;
 886         int i;
 887         char const *sep;
 888
 889         if (opcode != 0) {
 890                 sep = match_value(_port_name, opcode);
 891                 if (sep == NULL)
 892                         sep = "???";
 893                 bprintf(bp, " %s", sep);
 894         }
 895         sep = " ";
 896         for (i = F_LEN((ipfw_insn *)cmd) - 1; i > 0; i--, p += 2) {
 897                 bprintf(bp, "%s", sep);
 898                 print_port(bp, proto, p[0]);
 899                 if (p[0] != p[1]) {
 900                         bprintf(bp, "-");
 901                         print_port(bp, proto, p[1]);
 902                 }
 903                 sep = ",";
 904         }
 905 }
 906
 907 /*
 908  * Like strtol, but also translates service names into port numbers
 909  * for some protocols.
 910  * In particular:
 911  *      proto == -1 disables the protocol check;
 912  *      proto == IPPROTO_ETHERTYPE looks up an internal table
 913  *      proto == <some value in /etc/protocols> matches the values there.
 914  * Returns *end == s in case the parameter is not found.
 915  */
 916 static int
 917 strtoport(char *s, char **end, int base, int proto)
 918 {
 919         char *p, *buf;
 920         char *s1;
 921         int i;
 922
 923         *end = s;               /* default - not found */
 924         if (*s == '\0')
 925                 return 0;       /* not found */
 926
 927         if (isdigit(*s))
 928                 return strtol(s, end, base);
 929
 930         /*
 931          * find separator. '\\' escapes the next char.
 932          */
 933         for (s1 = s; *s1 && (isalnum(*s1) || *s1 == '\\') ; s1++)
 934                 if (*s1 == '\\' && s1[1] != '\0')
 935                         s1++;
 936
 937         buf = safe_calloc(s1 - s + 1, 1);
 938
 939         /*
 940          * copy into a buffer skipping backslashes
 941          */
 942         for (p = s, i = 0; p != s1 ; p++)
 943                 if (*p != '\\')
 944                         buf[i++] = *p;
 945         buf[i++] = '\0';
 946
 947         if (proto == IPPROTO_ETHERTYPE) {
 948                 i = match_token(ether_types, buf);
 949                 free(buf);
 950                 if (i != -1) {  /* found */
 951                         *end = s1;
 952                         return i;
 953                 }
 954         } else {
 955                 struct protoent *pe = NULL;
 956                 struct servent *se;
 957
 958                 if (proto != 0)
 959                         pe = getprotobynumber(proto);
 960                 setservent(1);
 961                 se = getservbyname(buf, pe ? pe->p_name : NULL);
 962                 free(buf);
 963                 if (se != NULL) {
 964                         *end = s1;
 965                         return ntohs(se->s_port);
 966                 }
 967         }
 968         return 0;       /* not found */
 969 }
 970
 971 /*
 972  * Fill the body of the command with the list of port ranges.
 973  */
 974 static int
 975 fill_newports(ipfw_insn_u16 *cmd, char *av, int proto, int cblen)
 976 {
 977         uint16_t a, b, *p = cmd->ports;
 978         int i = 0;
 979         char *s = av;
 980
 981         while (*s) {
 982                 a = strtoport(av, &s, 0, proto);
 983                 if (s == av)                    /* empty or invalid argument */
 984                         return (0);
 985
 986                 CHECK_LENGTH(cblen, i + 2);
 987
 988                 switch (*s) {
 989                 case '-':                       /* a range */
 990                         av = s + 1;
 991                         b = strtoport(av, &s, 0, proto);
 992                         /* Reject expressions like '1-abc' or '1-2-3'. */
 993                         if (s == av || (*s != ',' && *s != '\0'))
 994                                 return (0);
 995                         p[0] = a;
 996                         p[1] = b;
 997                         break;
 998                 case ',':                       /* comma separated list */
 999                 case '\0':
1000                         p[0] = p[1] = a;
1001                         break;
1002                 default:
1003                         warnx("port list: invalid separator <%c> in <%s>",
1004                                 *s, av);
1005                         return (0);
1006                 }
1007
1008                 i++;
1009                 p += 2;
1010                 av = s + 1;
1011         }
1012         if (i > 0) {
1013                 if (i + 1 > F_LEN_MASK)
1014                         errx(EX_DATAERR, "too many ports/ranges\n");
1015                 cmd->o.len |= i + 1;    /* leave F_NOT and F_OR untouched */
1016         }
1017         return (i);
1018 }
1019
1020 /*
1021  * Fill the body of the command with the list of DiffServ codepoints.
1022  */
1023 static void
1024 fill_dscp(ipfw_insn *cmd, char *av, int cblen)
1025 {
1026         uint32_t *low, *high;
1027         char *s = av, *a;
1028         int code;
1029
1030         cmd->opcode = O_DSCP;
1031         cmd->len |= F_INSN_SIZE(ipfw_insn_u32) + 1;
1032
1033         CHECK_CMDLEN;
1034
1035         low = (uint32_t *)(cmd + 1);
1036         high = low + 1;
1037
1038         *low = 0;
1039         *high = 0;
1040
1041         while (s != NULL) {
1042                 a = strchr(s, ',');
1043
1044                 if (a != NULL)
1045                         *a++ = '\0';
1046
1047                 if (isalpha(*s)) {
1048                         if ((code = match_token(f_ipdscp, s)) == -1)
1049                                 errx(EX_DATAERR, "Unknown DSCP code");
1050                 } else {
1051                         code = strtoul(s, NULL, 10);
1052                         if (code < 0 || code > 63)
1053                                 errx(EX_DATAERR, "Invalid DSCP value");
1054                 }
1055
1056                 if (code >= 32)
1057                         *high |= 1 << (code - 32);
1058                 else
1059                         *low |= 1 << code;
1060
1061                 s = a;
1062         }
1063 }
1064
1065 static struct _s_x icmpcodes[] = {
1066       { "net",                  ICMP_UNREACH_NET },
1067       { "host",                 ICMP_UNREACH_HOST },
1068       { "protocol",             ICMP_UNREACH_PROTOCOL },
1069       { "port",                 ICMP_UNREACH_PORT },
1070       { "needfrag",             ICMP_UNREACH_NEEDFRAG },
1071       { "srcfail",              ICMP_UNREACH_SRCFAIL },
1072       { "net-unknown",          ICMP_UNREACH_NET_UNKNOWN },
1073       { "host-unknown",         ICMP_UNREACH_HOST_UNKNOWN },
1074       { "isolated",             ICMP_UNREACH_ISOLATED },
1075       { "net-prohib",           ICMP_UNREACH_NET_PROHIB },
1076       { "host-prohib",          ICMP_UNREACH_HOST_PROHIB },
1077       { "tosnet",               ICMP_UNREACH_TOSNET },
1078       { "toshost",              ICMP_UNREACH_TOSHOST },
1079       { "filter-prohib",        ICMP_UNREACH_FILTER_PROHIB },
1080       { "host-precedence",      ICMP_UNREACH_HOST_PRECEDENCE },
1081       { "precedence-cutoff",    ICMP_UNREACH_PRECEDENCE_CUTOFF },
1082       { NULL, 0 }
1083 };
1084
1085 static void
1086 fill_reject_code(u_short *codep, char *str)
1087 {
1088         int val;
1089         char *s;
1090
1091         val = strtoul(str, &s, 0);
1092         if (s == str || *s != '\0' || val >= 0x100)
1093                 val = match_token(icmpcodes, str);
1094         if (val < 0)
1095                 errx(EX_DATAERR, "unknown ICMP unreachable code ``%s''", str);
1096         *codep = val;
1097         return;
1098 }
1099
1100 static void
1101 print_reject_code(struct buf_pr *bp, uint16_t code)
1102 {
1103         char const *s;
1104
1105         if ((s = match_value(icmpcodes, code)) != NULL)
1106                 bprintf(bp, "unreach %s", s);
1107         else
1108                 bprintf(bp, "unreach %u", code);
1109 }
1110
1111 /*
1112  * Returns the number of bits set (from left) in a contiguous bitmask,
1113  * or -1 if the mask is not contiguous.
1114  * XXX this needs a proper fix.
1115  * This effectively works on masks in big-endian (network) format.
1116  * when compiled on little endian architectures.
1117  *
1118  * First bit is bit 7 of the first byte -- note, for MAC addresses,
1119  * the first bit on the wire is bit 0 of the first byte.
1120  * len is the max length in bits.
1121  */
1122 int
1123 contigmask(uint8_t *p, int len)
1124 {
1125         int i, n;
1126
1127         for (i=0; i<len ; i++)
1128                 if ( (p[i/8] & (1 << (7 - (i%8)))) == 0) /* first bit unset */
1129                         break;
1130         for (n=i+1; n < len; n++)
1131                 if ( (p[n/8] & (1 << (7 - (n%8)))) != 0)
1132                         return -1; /* mask not contiguous */
1133         return i;
1134 }
1135
1136 /*
1137  * print flags set/clear in the two bitmasks passed as parameters.
1138  * There is a specialized check for f_tcpflags.
1139  */
1140 static void
1141 print_flags(struct buf_pr *bp, char const *name, ipfw_insn *cmd,
1142     struct _s_x *list)
1143 {
1144         char const *comma = "";
1145         int i;
1146         uint8_t set = cmd->arg1 & 0xff;
1147         uint8_t clear = (cmd->arg1 >> 8) & 0xff;
1148
1149         if (list == f_tcpflags && set == TH_SYN && clear == TH_ACK) {
1150                 bprintf(bp, " setup");
1151                 return;
1152         }
1153
1154         bprintf(bp, " %s ", name);
1155         for (i=0; list[i].x != 0; i++) {
1156                 if (set & list[i].x) {
1157                         set &= ~list[i].x;
1158                         bprintf(bp, "%s%s", comma, list[i].s);
1159                         comma = ",";
1160                 }
1161                 if (clear & list[i].x) {
1162                         clear &= ~list[i].x;
1163                         bprintf(bp, "%s!%s", comma, list[i].s);
1164                         comma = ",";
1165                 }
1166         }
1167 }
1168
1169
1170 /*
1171  * Print the ip address contained in a command.
1172  */
1173 static void
1174 print_ip(struct buf_pr *bp, struct format_opts *fo, ipfw_insn_ip *cmd,
1175     char const *s)
1176 {
1177         struct hostent *he = NULL;
1178         struct in_addr *ia;
1179         uint32_t len = F_LEN((ipfw_insn *)cmd);
1180         uint32_t *a = ((ipfw_insn_u32 *)cmd)->d;
1181         char *t;
1182
1183         if (cmd->o.opcode == O_IP_DST_LOOKUP && len > F_INSN_SIZE(ipfw_insn_u32)) {
1184                 uint32_t d = a[1];
1185                 const char *arg = "<invalid>";
1186
1187                 if (d < sizeof(lookup_key)/sizeof(lookup_key[0]))
1188                         arg = match_value(rule_options, lookup_key[d]);
1189                 t = table_search_ctlv(fo->tstate, ((ipfw_insn *)cmd)->arg1);
1190                 bprintf(bp, "%s lookup %s %s", cmd->o.len & F_NOT ? " not": "",
1191                         arg, t);
1192                 return;
1193         }
1194         bprintf(bp, "%s%s ", cmd->o.len & F_NOT ? " not": "", s);
1195
1196         if (cmd->o.opcode == O_IP_SRC_ME || cmd->o.opcode == O_IP_DST_ME) {
1197                 bprintf(bp, "me");
1198                 return;
1199         }
1200         if (cmd->o.opcode == O_IP_SRC_LOOKUP ||
1201             cmd->o.opcode == O_IP_DST_LOOKUP) {
1202                 t = table_search_ctlv(fo->tstate, ((ipfw_insn *)cmd)->arg1);
1203                 bprintf(bp, "table(%s", t);
1204                 if (len == F_INSN_SIZE(ipfw_insn_u32))
1205                         bprintf(bp, ",%u", *a);
1206                 bprintf(bp, ")");
1207                 return;
1208         }
1209         if (cmd->o.opcode == O_IP_SRC_SET || cmd->o.opcode == O_IP_DST_SET) {
1210                 uint32_t x, *map = (uint32_t *)&(cmd->mask);
1211                 int i, j;
1212                 char comma = '{';
1213
1214                 x = cmd->o.arg1 - 1;
1215                 x = htonl( ~x );
1216                 cmd->addr.s_addr = htonl(cmd->addr.s_addr);
1217                 bprintf(bp, "%s/%d", inet_ntoa(cmd->addr),
1218                         contigmask((uint8_t *)&x, 32));
1219                 x = cmd->addr.s_addr = htonl(cmd->addr.s_addr);
1220                 x &= 0xff; /* base */
1221                 /*
1222                  * Print bits and ranges.
1223                  * Locate first bit set (i), then locate first bit unset (j).
1224                  * If we have 3+ consecutive bits set, then print them as a
1225                  * range, otherwise only print the initial bit and rescan.
1226                  */
1227                 for (i=0; i < cmd->o.arg1; i++)
1228                         if (map[i/32] & (1<<(i & 31))) {
1229                                 for (j=i+1; j < cmd->o.arg1; j++)
1230                                         if (!(map[ j/32] & (1<<(j & 31))))
1231                                                 break;
1232                                 bprintf(bp, "%c%d", comma, i+x);
1233                                 if (j>i+2) { /* range has at least 3 elements */
1234                                         bprintf(bp, "-%d", j-1+x);
1235                                         i = j-1;
1236                                 }
1237                                 comma = ',';
1238                         }
1239                 bprintf(bp, "}");
1240                 return;
1241         }
1242         /*
1243          * len == 2 indicates a single IP, whereas lists of 1 or more
1244          * addr/mask pairs have len = (2n+1). We convert len to n so we
1245          * use that to count the number of entries.
1246          */
1247     for (len = len / 2; len > 0; len--, a += 2) {
1248         int mb =        /* mask length */
1249             (cmd->o.opcode == O_IP_SRC || cmd->o.opcode == O_IP_DST) ?
1250                 32 : contigmask((uint8_t *)&(a[1]), 32);
1251         if (mb == 32 && co.do_resolv)
1252                 he = gethostbyaddr((char *)&(a[0]), sizeof(u_long), AF_INET);
1253         if (he != NULL)         /* resolved to name */
1254                 bprintf(bp, "%s", he->h_name);
1255         else if (mb == 0)       /* any */
1256                 bprintf(bp, "any");
1257         else {          /* numeric IP followed by some kind of mask */
1258                 ia = (struct in_addr *)&a[0];
1259                 bprintf(bp, "%s", inet_ntoa(*ia));
1260                 if (mb < 0) {
1261                         ia = (struct in_addr *)&a[1];
1262                         bprintf(bp, ":%s", inet_ntoa(*ia));
1263                 } else if (mb < 32)
1264                         bprintf(bp, "/%d", mb);
1265         }
1266         if (len > 1)
1267                 bprintf(bp, ",");
1268     }
1269 }
1270
1271 /*
1272  * prints a MAC address/mask pair
1273  */
1274 static void
1275 print_mac(struct buf_pr *bp, uint8_t *addr, uint8_t *mask)
1276 {
1277         int l = contigmask(mask, 48);
1278
1279         if (l == 0)
1280                 bprintf(bp, " any");
1281         else {
1282                 bprintf(bp, " %02x:%02x:%02x:%02x:%02x:%02x",
1283                     addr[0], addr[1], addr[2], addr[3], addr[4], addr[5]);
1284                 if (l == -1)
1285                         bprintf(bp, "&%02x:%02x:%02x:%02x:%02x:%02x",
1286                             mask[0], mask[1], mask[2],
1287                             mask[3], mask[4], mask[5]);
1288                 else if (l < 48)
1289                         bprintf(bp, "/%d", l);
1290         }
1291 }
1292
1293 static void
1294 fill_icmptypes(ipfw_insn_u32 *cmd, char *av)
1295 {
1296         uint8_t type;
1297
1298         cmd->d[0] = 0;
1299         while (*av) {
1300                 if (*av == ',')
1301                         av++;
1302
1303                 type = strtoul(av, &av, 0);
1304
1305                 if (*av != ',' && *av != '\0')
1306                         errx(EX_DATAERR, "invalid ICMP type");
1307
1308                 if (type > 31)
1309                         errx(EX_DATAERR, "ICMP type out of range");
1310
1311                 cmd->d[0] |= 1 << type;
1312         }
1313         cmd->o.opcode = O_ICMPTYPE;
1314         cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32);
1315 }
1316
1317 static void
1318 print_icmptypes(struct buf_pr *bp, ipfw_insn_u32 *cmd)
1319 {
1320         int i;
1321         char sep= ' ';
1322
1323         bprintf(bp, " icmptypes");
1324         for (i = 0; i < 32; i++) {
1325                 if ( (cmd->d[0] & (1 << (i))) == 0)
1326                         continue;
1327                 bprintf(bp, "%c%d", sep, i);
1328                 sep = ',';
1329         }
1330 }
1331
1332 static void
1333 print_dscp(struct buf_pr *bp, ipfw_insn_u32 *cmd)
1334 {
1335         int i = 0;
1336         uint32_t *v;
1337         char sep= ' ';
1338         const char *code;
1339
1340         bprintf(bp, " dscp");
1341         v = cmd->d;
1342         while (i < 64) {
1343                 if (*v & (1 << i)) {
1344                         if ((code = match_value(f_ipdscp, i)) != NULL)
1345                                 bprintf(bp, "%c%s", sep, code);
1346                         else
1347                                 bprintf(bp, "%c%d", sep, i);
1348                         sep = ',';
1349                 }
1350
1351                 if ((++i % 32) == 0)
1352                         v++;
1353         }
1354 }
1355
1356 /*
1357  * show_ipfw() prints the body of an ipfw rule.
1358  * Because the standard rule has at least proto src_ip dst_ip, we use
1359  * a helper function to produce these entries if not provided explicitly.
1360  * The first argument is the list of fields we have, the second is
1361  * the list of fields we want to be printed.
1362  *
1363  * Special cases if we have provided a MAC header:
1364  *   + if the rule does not contain IP addresses/ports, do not print them;
1365  *   + if the rule does not contain an IP proto, print "all" instead of "ip";
1366  *
1367  * Once we have 'have_options', IP header fields are printed as options.
1368  */
1369 #define HAVE_PROTO      0x0001
1370 #define HAVE_SRCIP      0x0002
1371 #define HAVE_DSTIP      0x0004
1372 #define HAVE_PROTO4     0x0008
1373 #define HAVE_PROTO6     0x0010
1374 #define HAVE_IP         0x0100
1375 #define HAVE_OPTIONS    0x8000
1376
1377 static void
1378 show_prerequisites(struct buf_pr *bp, int *flags, int want, int cmd)
1379 {
1380         (void)cmd;      /* UNUSED */
1381         if (co.comment_only)
1382                 return;
1383         if ( (*flags & HAVE_IP) == HAVE_IP)
1384                 *flags |= HAVE_OPTIONS;
1385
1386         if ( !(*flags & HAVE_OPTIONS)) {
1387                 if ( !(*flags & HAVE_PROTO) && (want & HAVE_PROTO)) {
1388                         if ( (*flags & HAVE_PROTO4))
1389                                 bprintf(bp, " ip4");
1390                         else if ( (*flags & HAVE_PROTO6))
1391                                 bprintf(bp, " ip6");
1392                         else
1393                                 bprintf(bp, " ip");
1394                 }
1395                 if ( !(*flags & HAVE_SRCIP) && (want & HAVE_SRCIP))
1396                         bprintf(bp, " from any");
1397                 if ( !(*flags & HAVE_DSTIP) && (want & HAVE_DSTIP))
1398                         bprintf(bp, " to any");
1399         }
1400         *flags |= want;
1401 }
1402
1403 static void
1404 show_static_rule(struct cmdline_opts *co, struct format_opts *fo,
1405     struct buf_pr *bp, struct ip_fw_rule *rule, struct ip_fw_bcounter *cntr)
1406 {
1407         static int twidth = 0;
1408         int l;
1409         ipfw_insn *cmd, *has_eaction = NULL, *tagptr = NULL;
1410         const char *comment = NULL;     /* ptr to comment if we have one */
1411         const char *ename;
1412         int proto = 0;          /* default */
1413         int flags = 0;  /* prerequisites */
1414         ipfw_insn_log *logptr = NULL; /* set if we find an O_LOG */
1415         ipfw_insn_altq *altqptr = NULL; /* set if we find an O_ALTQ */
1416         int or_block = 0;       /* we are in an or block */
1417         uint32_t uval;
1418
1419         if ((fo->set_mask & (1 << rule->set)) == 0) {
1420                 /* disabled mask */
1421                 if (!co->show_sets)
1422                         return;
1423                 else
1424                         bprintf(bp, "# DISABLED ");
1425         }
1426         bprintf(bp, "%05u ", rule->rulenum);
1427
1428         /* Print counters if enabled */
1429         if (fo->pcwidth > 0 || fo->bcwidth > 0) {
1430                 pr_u64(bp, &cntr->pcnt, fo->pcwidth);
1431                 pr_u64(bp, &cntr->bcnt, fo->bcwidth);
1432         }
1433
1434         if (co->do_time == 2)
1435                 bprintf(bp, "%10u ", cntr->timestamp);
1436         else if (co->do_time == 1) {
1437                 char timestr[30];
1438                 time_t t = (time_t)0;
1439
1440                 if (twidth == 0) {
1441                         strcpy(timestr, ctime(&t));
1442                         *strchr(timestr, '\n') = '\0';
1443                         twidth = strlen(timestr);
1444                 }
1445                 if (cntr->timestamp > 0) {
1446                         t = _long_to_time(cntr->timestamp);
1447
1448                         strcpy(timestr, ctime(&t));
1449                         *strchr(timestr, '\n') = '\0';
1450                         bprintf(bp, "%s ", timestr);
1451                 } else {
1452                         bprintf(bp, "%*s", twidth, " ");
1453                 }
1454         }
1455
1456         if (co->show_sets)
1457                 bprintf(bp, "set %d ", rule->set);
1458
1459         /*
1460          * print the optional "match probability"
1461          */
1462         if (rule->cmd_len > 0) {
1463                 cmd = rule->cmd ;
1464                 if (cmd->opcode == O_PROB) {
1465                         ipfw_insn_u32 *p = (ipfw_insn_u32 *)cmd;
1466                         double d = 1.0 * p->d[0];
1467
1468                         d = (d / 0x7fffffff);
1469                         bprintf(bp, "prob %f ", d);
1470                 }
1471         }
1472
1473         /*
1474          * first print actions
1475          */
1476         for (l = rule->cmd_len - rule->act_ofs, cmd = ACTION_PTR(rule);
1477                         l > 0 ; l -= F_LEN(cmd), cmd += F_LEN(cmd)) {
1478                 switch(cmd->opcode) {
1479                 case O_CHECK_STATE:
1480                         bprintf(bp, "check-state");
1481                         if (cmd->arg1 != 0)
1482                                 ename = object_search_ctlv(fo->tstate,
1483                                     cmd->arg1, IPFW_TLV_STATE_NAME);
1484                         else
1485                                 ename = NULL;
1486                         bprintf(bp, " %s", ename ? ename: "any");
1487                         /* avoid printing anything else */
1488                         flags = HAVE_PROTO | HAVE_SRCIP |
1489                                 HAVE_DSTIP | HAVE_IP;
1490                         break;
1491
1492                 case O_ACCEPT:
1493                         bprintf(bp, "allow");
1494                         break;
1495
1496                 case O_COUNT:
1497                         bprintf(bp, "count");
1498                         break;
1499
1500                 case O_DENY:
1501                         bprintf(bp, "deny");
1502                         break;
1503
1504                 case O_REJECT:
1505                         if (cmd->arg1 == ICMP_REJECT_RST)
1506                                 bprintf(bp, "reset");
1507                         else if (cmd->arg1 == ICMP_UNREACH_HOST)
1508                                 bprintf(bp, "reject");
1509                         else
1510                                 print_reject_code(bp, cmd->arg1);
1511                         break;
1512
1513                 case O_UNREACH6:
1514                         if (cmd->arg1 == ICMP6_UNREACH_RST)
1515                                 bprintf(bp, "reset6");
1516                         else
1517                                 print_unreach6_code(bp, cmd->arg1);
1518                         break;
1519
1520                 case O_SKIPTO:
1521                         bprint_uint_arg(bp, "skipto ", cmd->arg1);
1522                         break;
1523
1524                 case O_PIPE:
1525                         bprint_uint_arg(bp, "pipe ", cmd->arg1);
1526                         break;
1527
1528                 case O_QUEUE:
1529                         bprint_uint_arg(bp, "queue ", cmd->arg1);
1530                         break;
1531
1532                 case O_DIVERT:
1533                         bprint_uint_arg(bp, "divert ", cmd->arg1);
1534                         break;
1535
1536                 case O_TEE:
1537                         bprint_uint_arg(bp, "tee ", cmd->arg1);
1538                         break;
1539
1540                 case O_NETGRAPH:
1541                         bprint_uint_arg(bp, "netgraph ", cmd->arg1);
1542                         break;
1543
1544                 case O_NGTEE:
1545                         bprint_uint_arg(bp, "ngtee ", cmd->arg1);
1546                         break;
1547
1548                 case O_FORWARD_IP:
1549                     {
1550                         ipfw_insn_sa *s = (ipfw_insn_sa *)cmd;
1551
1552                         if (s->sa.sin_addr.s_addr == INADDR_ANY) {
1553                                 bprintf(bp, "fwd tablearg");
1554                         } else {
1555                                 bprintf(bp, "fwd %s",inet_ntoa(s->sa.sin_addr));
1556                         }
1557                         if (s->sa.sin_port)
1558                                 bprintf(bp, ",%d", s->sa.sin_port);
1559                     }
1560                         break;
1561
1562                 case O_FORWARD_IP6:
1563                     {
1564                         char buf[INET6_ADDRSTRLEN + IF_NAMESIZE + 2];
1565                         ipfw_insn_sa6 *s = (ipfw_insn_sa6 *)cmd;
1566
1567                         bprintf(bp, "fwd ");
1568                         if (getnameinfo((const struct sockaddr *)&s->sa,
1569                             sizeof(struct sockaddr_in6), buf, sizeof(buf),
1570                             NULL, 0, NI_NUMERICHOST) == 0)
1571                                 bprintf(bp, "%s", buf);
1572                         if (s->sa.sin6_port)
1573                                 bprintf(bp, ",%d", s->sa.sin6_port);
1574                     }
1575                         break;
1576
1577                 case O_LOG: /* O_LOG is printed last */
1578                         logptr = (ipfw_insn_log *)cmd;
1579                         break;
1580
1581                 case O_ALTQ: /* O_ALTQ is printed after O_LOG */
1582                         altqptr = (ipfw_insn_altq *)cmd;
1583                         break;
1584
1585                 case O_TAG:
1586                         tagptr = cmd;
1587                         break;
1588
1589                 case O_NAT:
1590                         if (cmd->arg1 != IP_FW_NAT44_GLOBAL)
1591                                 bprint_uint_arg(bp, "nat ", cmd->arg1);
1592                         else
1593                                 bprintf(bp, "nat global");
1594                         break;
1595
1596                 case O_SETFIB:
1597                         if (cmd->arg1 == IP_FW_TARG)
1598                                 bprint_uint_arg(bp, "setfib ", cmd->arg1);
1599                         else
1600                                 bprintf(bp, "setfib %u", cmd->arg1 & 0x7FFF);
1601                         break;
1602
1603                 case O_EXTERNAL_ACTION: {
1604                         /*
1605                          * The external action can consists of two following
1606                          * each other opcodes - O_EXTERNAL_ACTION and
1607                          * O_EXTERNAL_INSTANCE. The first contains the ID of
1608                          * name of external action. The second contains the ID
1609                          * of name of external action instance.
1610                          * NOTE: in case when external action has no named
1611                          * instances support, the second opcode isn't needed.
1612                          */
1613                         has_eaction = cmd;
1614                         ename = object_search_ctlv(fo->tstate, cmd->arg1,
1615                             IPFW_TLV_EACTION);
1616                         if (match_token(rule_eactions, ename) != -1)
1617                                 bprintf(bp, "%s", ename);
1618                         else
1619                                 bprintf(bp, "eaction %s", ename);
1620                         break;
1621                 }
1622
1623                 case O_EXTERNAL_INSTANCE: {
1624                         if (has_eaction == NULL)
1625                                 break;
1626                         /*
1627                          * XXX: we need to teach ipfw(9) to rewrite opcodes
1628                          * in the user buffer on rule addition. When we add
1629                          * the rule, we specify zero TLV type for
1630                          * O_EXTERNAL_INSTANCE object. To show correct
1631                          * rule after `ipfw add` we need to search instance
1632                          * name with zero type. But when we do `ipfw show`
1633                          * we calculate TLV type using IPFW_TLV_EACTION_NAME()
1634                          * macro.
1635                          */
1636                         ename = object_search_ctlv(fo->tstate, cmd->arg1, 0);
1637                         if (ename == NULL)
1638                                 ename = object_search_ctlv(fo->tstate,
1639                                     cmd->arg1,
1640                                     IPFW_TLV_EACTION_NAME(has_eaction->arg1));
1641                         bprintf(bp, " %s", ename);
1642                         break;
1643                 }
1644
1645                 case O_SETDSCP:
1646                     {
1647                         const char *code;
1648
1649                         if (cmd->arg1 == IP_FW_TARG) {
1650                                 bprint_uint_arg(bp, "setdscp ", cmd->arg1);
1651                                 break;
1652                         }
1653                         uval = cmd->arg1 & 0x3F;
1654                         if ((code = match_value(f_ipdscp, uval)) != NULL)
1655                                 bprintf(bp, "setdscp %s", code);
1656                         else
1657                                 bprint_uint_arg(bp, "setdscp ", uval);
1658                     }
1659                         break;
1660
1661                 case O_REASS:
1662                         bprintf(bp, "reass");
1663                         break;
1664
1665                 case O_CALLRETURN:
1666                         if (cmd->len & F_NOT)
1667                                 bprintf(bp, "return");
1668                         else
1669                                 bprint_uint_arg(bp, "call ", cmd->arg1);
1670                         break;
1671
1672                 default:
1673                         bprintf(bp, "** unrecognized action %d len %d ",
1674                                 cmd->opcode, cmd->len);
1675                 }
1676         }
1677         if (logptr) {
1678                 if (logptr->max_log > 0)
1679                         bprintf(bp, " log logamount %d", logptr->max_log);
1680                 else
1681                         bprintf(bp, " log");
1682         }
1683 #ifndef NO_ALTQ
1684         if (altqptr) {
1685                 print_altq_cmd(bp, altqptr);
1686         }
1687 #endif
1688         if (tagptr) {
1689                 if (tagptr->len & F_NOT)
1690                         bprint_uint_arg(bp, " untag ", tagptr->arg1);
1691                 else
1692                         bprint_uint_arg(bp, " tag ", tagptr->arg1);
1693         }
1694
1695         /*
1696          * then print the body.
1697          */
1698         for (l = rule->act_ofs, cmd = rule->cmd;
1699                         l > 0 ; l -= F_LEN(cmd) , cmd += F_LEN(cmd)) {
1700                 if ((cmd->len & F_OR) || (cmd->len & F_NOT))
1701                         continue;
1702                 if (cmd->opcode == O_IP4) {
1703                         flags |= HAVE_PROTO4;
1704                         break;
1705                 } else if (cmd->opcode == O_IP6) {
1706                         flags |= HAVE_PROTO6;
1707                         break;
1708                 }
1709         }
1710         if (rule->flags & IPFW_RULE_NOOPT) {    /* empty rules before options */
1711                 if (!co->do_compact) {
1712                         show_prerequisites(bp, &flags, HAVE_PROTO, 0);
1713                         bprintf(bp, " from any to any");
1714                 }
1715                 flags |= HAVE_IP | HAVE_OPTIONS | HAVE_PROTO |
1716                          HAVE_SRCIP | HAVE_DSTIP;
1717         }
1718
1719         if (co->comment_only)
1720                 comment = "...";
1721
1722         for (l = rule->act_ofs, cmd = rule->cmd;
1723                         l > 0 ; l -= F_LEN(cmd) , cmd += F_LEN(cmd)) {
1724                 /* useful alias */
1725                 ipfw_insn_u32 *cmd32 = (ipfw_insn_u32 *)cmd;
1726
1727                 if (co->comment_only) {
1728                         if (cmd->opcode != O_NOP)
1729                                 continue;
1730                         bprintf(bp, " // %s\n", (char *)(cmd + 1));
1731                         return;
1732                 }
1733
1734                 show_prerequisites(bp, &flags, 0, cmd->opcode);
1735
1736                 switch(cmd->opcode) {
1737                 case O_PROB:
1738                         break;  /* done already */
1739
1740                 case O_PROBE_STATE:
1741                         break; /* no need to print anything here */
1742
1743                 case O_IP_SRC:
1744                 case O_IP_SRC_LOOKUP:
1745                 case O_IP_SRC_MASK:
1746                 case O_IP_SRC_ME:
1747                 case O_IP_SRC_SET:
1748                         show_prerequisites(bp, &flags, HAVE_PROTO, 0);
1749                         if (!(flags & HAVE_SRCIP))
1750                                 bprintf(bp, " from");
1751                         if ((cmd->len & F_OR) && !or_block)
1752                                 bprintf(bp, " {");
1753                         print_ip(bp, fo, (ipfw_insn_ip *)cmd,
1754                                 (flags & HAVE_OPTIONS) ? " src-ip" : "");
1755                         flags |= HAVE_SRCIP;
1756                         break;
1757
1758                 case O_IP_DST:
1759                 case O_IP_DST_LOOKUP:
1760                 case O_IP_DST_MASK:
1761                 case O_IP_DST_ME:
1762                 case O_IP_DST_SET:
1763                         show_prerequisites(bp, &flags, HAVE_PROTO|HAVE_SRCIP, 0);
1764                         if (!(flags & HAVE_DSTIP))
1765                                 bprintf(bp, " to");
1766                         if ((cmd->len & F_OR) && !or_block)
1767                                 bprintf(bp, " {");
1768                         print_ip(bp, fo, (ipfw_insn_ip *)cmd,
1769                                 (flags & HAVE_OPTIONS) ? " dst-ip" : "");
1770                         flags |= HAVE_DSTIP;
1771                         break;
1772
1773                 case O_IP6_SRC:
1774                 case O_IP6_SRC_MASK:
1775                 case O_IP6_SRC_ME:
1776                         show_prerequisites(bp, &flags, HAVE_PROTO, 0);
1777                         if (!(flags & HAVE_SRCIP))
1778                                 bprintf(bp, " from");
1779                         if ((cmd->len & F_OR) && !or_block)
1780                                 bprintf(bp, " {");
1781                         print_ip6(bp, (ipfw_insn_ip6 *)cmd,
1782                             (flags & HAVE_OPTIONS) ? " src-ip6" : "");
1783                         flags |= HAVE_SRCIP | HAVE_PROTO;
1784                         break;
1785
1786                 case O_IP6_DST:
1787                 case O_IP6_DST_MASK:
1788                 case O_IP6_DST_ME:
1789                         show_prerequisites(bp, &flags, HAVE_PROTO|HAVE_SRCIP, 0);
1790                         if (!(flags & HAVE_DSTIP))
1791                                 bprintf(bp, " to");
1792                         if ((cmd->len & F_OR) && !or_block)
1793                                 bprintf(bp, " {");
1794                         print_ip6(bp, (ipfw_insn_ip6 *)cmd,
1795                             (flags & HAVE_OPTIONS) ? " dst-ip6" : "");
1796                         flags |= HAVE_DSTIP;
1797                         break;
1798
1799                 case O_FLOW6ID:
1800                         print_flow6id(bp, (ipfw_insn_u32 *) cmd );
1801                         flags |= HAVE_OPTIONS;
1802                         break;
1803
1804                 case O_IP_DSTPORT:
1805                         show_prerequisites(bp, &flags,
1806                                 HAVE_PROTO | HAVE_SRCIP |
1807                                 HAVE_DSTIP | HAVE_IP, 0);
1808                 case O_IP_SRCPORT:
1809                         if (flags & HAVE_DSTIP)
1810                                 flags |= HAVE_IP;
1811                         show_prerequisites(bp, &flags,
1812                                 HAVE_PROTO | HAVE_SRCIP, 0);
1813                         if ((cmd->len & F_OR) && !or_block)
1814                                 bprintf(bp, " {");
1815                         if (cmd->len & F_NOT)
1816                                 bprintf(bp, " not");
1817                         print_newports(bp, (ipfw_insn_u16 *)cmd, proto,
1818                                 (flags & HAVE_OPTIONS) ? cmd->opcode : 0);
1819                         break;
1820
1821                 case O_PROTO: {
1822                         struct protoent *pe = NULL;
1823
1824                         if ((cmd->len & F_OR) && !or_block)
1825                                 bprintf(bp, " {");
1826                         if (cmd->len & F_NOT)
1827                                 bprintf(bp, " not");
1828                         proto = cmd->arg1;
1829                         pe = getprotobynumber(cmd->arg1);
1830                         if ((flags & (HAVE_PROTO4 | HAVE_PROTO6)) &&
1831                             !(flags & HAVE_PROTO))
1832                                 show_prerequisites(bp, &flags,
1833                                     HAVE_PROTO | HAVE_IP | HAVE_SRCIP |
1834                                     HAVE_DSTIP | HAVE_OPTIONS, 0);
1835                         if (flags & HAVE_OPTIONS)
1836                                 bprintf(bp, " proto");
1837                         if (pe)
1838                                 bprintf(bp, " %s", pe->p_name);
1839                         else
1840                                 bprintf(bp, " %u", cmd->arg1);
1841                         }
1842                         flags |= HAVE_PROTO;
1843                         break;
1844
1845                 default: /*options ... */
1846                         if (!(cmd->len & (F_OR|F_NOT)))
1847                                 if (((cmd->opcode == O_IP6) &&
1848                                     (flags & HAVE_PROTO6)) ||
1849                                     ((cmd->opcode == O_IP4) &&
1850                                     (flags & HAVE_PROTO4)))
1851                                         break;
1852                         show_prerequisites(bp, &flags, HAVE_PROTO | HAVE_SRCIP |
1853                                     HAVE_DSTIP | HAVE_IP | HAVE_OPTIONS, 0);
1854                         if ((cmd->len & F_OR) && !or_block)
1855                                 bprintf(bp, " {");
1856                         if (cmd->len & F_NOT && cmd->opcode != O_IN)
1857                                 bprintf(bp, " not");
1858                         switch(cmd->opcode) {
1859                         case O_MACADDR2: {
1860                                 ipfw_insn_mac *m = (ipfw_insn_mac *)cmd;
1861
1862                                 bprintf(bp, " MAC");
1863                                 print_mac(bp, m->addr, m->mask);
1864                                 print_mac(bp, m->addr + 6, m->mask + 6);
1865                                 }
1866                                 break;
1867
1868                         case O_MAC_TYPE:
1869                                 print_newports(bp, (ipfw_insn_u16 *)cmd,
1870                                                 IPPROTO_ETHERTYPE, cmd->opcode);
1871                                 break;
1872
1873
1874                         case O_FRAG:
1875                                 bprintf(bp, " frag");
1876                                 break;
1877
1878                         case O_FIB:
1879                                 bprintf(bp, " fib %u", cmd->arg1 );
1880                                 break;
1881                         case O_SOCKARG:
1882                                 bprintf(bp, " sockarg");
1883                                 break;
1884
1885                         case O_IN:
1886                                 bprintf(bp, cmd->len & F_NOT ? " out" : " in");
1887                                 break;
1888
1889                         case O_DIVERTED:
1890                                 switch (cmd->arg1) {
1891                                 case 3:
1892                                         bprintf(bp, " diverted");
1893                                         break;
1894                                 case 1:
1895                                         bprintf(bp, " diverted-loopback");
1896                                         break;
1897                                 case 2:
1898                                         bprintf(bp, " diverted-output");
1899                                         break;
1900                                 default:
1901                                         bprintf(bp, " diverted-?<%u>", cmd->arg1);
1902                                         break;
1903                                 }
1904                                 break;
1905
1906                         case O_LAYER2:
1907                                 bprintf(bp, " layer2");
1908                                 break;
1909                         case O_XMIT:
1910                         case O_RECV:
1911                         case O_VIA:
1912                             {
1913                                 char const *s, *t;
1914                                 ipfw_insn_if *cmdif = (ipfw_insn_if *)cmd;
1915
1916                                 if (cmd->opcode == O_XMIT)
1917                                         s = "xmit";
1918                                 else if (cmd->opcode == O_RECV)
1919                                         s = "recv";
1920                                 else /* if (cmd->opcode == O_VIA) */
1921                                         s = "via";
1922                                 if (cmdif->name[0] == '\0')
1923                                         bprintf(bp, " %s %s", s,
1924                                             inet_ntoa(cmdif->p.ip));
1925                                 else if (cmdif->name[0] == '\1') {
1926                                         /* interface table */
1927                                         t = table_search_ctlv(fo->tstate,
1928                                             cmdif->p.kidx);
1929                                         bprintf(bp, " %s table(%s)", s, t);
1930                                 } else
1931                                         bprintf(bp, " %s %s", s, cmdif->name);
1932
1933                                 break;
1934                             }
1935                         case O_IP_FLOW_LOOKUP:
1936                             {
1937                                 char *t;
1938
1939                                 t = table_search_ctlv(fo->tstate, cmd->arg1);
1940                                 bprintf(bp, " flow table(%s", t);
1941                                 if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_u32))
1942                                         bprintf(bp, ",%u",
1943                                             ((ipfw_insn_u32 *)cmd)->d[0]);
1944                                 bprintf(bp, ")");
1945                                 break;
1946                             }
1947                         case O_IPID:
1948                                 if (F_LEN(cmd) == 1)
1949                                     bprintf(bp, " ipid %u", cmd->arg1 );
1950                                 else
1951                                     print_newports(bp, (ipfw_insn_u16 *)cmd, 0,
1952                                         O_IPID);
1953                                 break;
1954
1955                         case O_IPTTL:
1956                                 if (F_LEN(cmd) == 1)
1957                                     bprintf(bp, " ipttl %u", cmd->arg1 );
1958                                 else
1959                                     print_newports(bp, (ipfw_insn_u16 *)cmd, 0,
1960                                         O_IPTTL);
1961                                 break;
1962
1963                         case O_IPVER:
1964                                 bprintf(bp, " ipver %u", cmd->arg1 );
1965                                 break;
1966
1967                         case O_IPPRECEDENCE:
1968                                 bprintf(bp, " ipprecedence %u", cmd->arg1 >> 5);
1969                                 break;
1970
1971                         case O_DSCP:
1972                                 print_dscp(bp, (ipfw_insn_u32 *)cmd);
1973                                 break;
1974
1975                         case O_IPLEN:
1976                                 if (F_LEN(cmd) == 1)
1977                                     bprintf(bp, " iplen %u", cmd->arg1 );
1978                                 else
1979                                     print_newports(bp, (ipfw_insn_u16 *)cmd, 0,
1980                                         O_IPLEN);
1981                                 break;
1982
1983                         case O_IPOPT:
1984                                 print_flags(bp, "ipoptions", cmd, f_ipopts);
1985                                 break;
1986
1987                         case O_IPTOS:
1988                                 print_flags(bp, "iptos", cmd, f_iptos);
1989                                 break;
1990
1991                         case O_ICMPTYPE:
1992                                 print_icmptypes(bp, (ipfw_insn_u32 *)cmd);
1993                                 break;
1994
1995                         case O_ESTAB:
1996                                 bprintf(bp, " established");
1997                                 break;
1998
1999                         case O_TCPDATALEN:
2000                                 if (F_LEN(cmd) == 1)
2001                                     bprintf(bp, " tcpdatalen %u", cmd->arg1 );
2002                                 else
2003                                     print_newports(bp, (ipfw_insn_u16 *)cmd, 0,
2004                                         O_TCPDATALEN);
2005                                 break;
2006
2007                         case O_TCPFLAGS:
2008                                 print_flags(bp, "tcpflags", cmd, f_tcpflags);
2009                                 break;
2010
2011                         case O_TCPOPTS:
2012                                 print_flags(bp, "tcpoptions", cmd, f_tcpopts);
2013                                 break;
2014
2015                         case O_TCPWIN:
2016                                 if (F_LEN(cmd) == 1)
2017                                     bprintf(bp, " tcpwin %u", cmd->arg1);
2018                                 else
2019                                     print_newports(bp, (ipfw_insn_u16 *)cmd, 0,
2020                                         O_TCPWIN);
2021                                 break;
2022
2023                         case O_TCPACK:
2024                                 bprintf(bp, " tcpack %d", ntohl(cmd32->d[0]));
2025                                 break;
2026
2027                         case O_TCPSEQ:
2028                                 bprintf(bp, " tcpseq %d", ntohl(cmd32->d[0]));
2029                                 break;
2030
2031                         case O_UID:
2032                             {
2033                                 struct passwd *pwd = getpwuid(cmd32->d[0]);
2034
2035                                 if (pwd)
2036                                         bprintf(bp, " uid %s", pwd->pw_name);
2037                                 else
2038                                         bprintf(bp, " uid %u", cmd32->d[0]);
2039                             }
2040                                 break;
2041
2042                         case O_GID:
2043                             {
2044                                 struct group *grp = getgrgid(cmd32->d[0]);
2045
2046                                 if (grp)
2047                                         bprintf(bp, " gid %s", grp->gr_name);
2048                                 else
2049                                         bprintf(bp, " gid %u", cmd32->d[0]);
2050                             }
2051                                 break;
2052
2053                         case O_JAIL:
2054                                 bprintf(bp, " jail %d", cmd32->d[0]);
2055                                 break;
2056
2057                         case O_VERREVPATH:
2058                                 bprintf(bp, " verrevpath");
2059                                 break;
2060
2061                         case O_VERSRCREACH:
2062                                 bprintf(bp, " versrcreach");
2063                                 break;
2064
2065                         case O_ANTISPOOF:
2066                                 bprintf(bp, " antispoof");
2067                                 break;
2068
2069                         case O_IPSEC:
2070                                 bprintf(bp, " ipsec");
2071                                 break;
2072
2073                         case O_NOP:
2074                                 comment = (char *)(cmd + 1);
2075                                 break;
2076
2077                         case O_KEEP_STATE:
2078                                 bprintf(bp, " keep-state");
2079                                 bprintf(bp, " %s",
2080                                     object_search_ctlv(fo->tstate, cmd->arg1,
2081                                     IPFW_TLV_STATE_NAME));
2082                                 break;
2083
2084                         case O_LIMIT: {
2085                                 struct _s_x *p = limit_masks;
2086                                 ipfw_insn_limit *c = (ipfw_insn_limit *)cmd;
2087                                 uint8_t x = c->limit_mask;
2088                                 char const *comma = " ";
2089
2090                                 bprintf(bp, " limit");
2091                                 for (; p->x != 0 ; p++)
2092                                         if ((x & p->x) == p->x) {
2093                                                 x &= ~p->x;
2094                                                 bprintf(bp, "%s%s", comma,p->s);
2095                                                 comma = ",";
2096                                         }
2097                                 bprint_uint_arg(bp, " ", c->conn_limit);
2098                                 bprintf(bp, " %s",
2099                                     object_search_ctlv(fo->tstate, cmd->arg1,
2100                                     IPFW_TLV_STATE_NAME));
2101                                 break;
2102                         }
2103
2104                         case O_IP6:
2105                                 bprintf(bp, " ip6");
2106                                 break;
2107
2108                         case O_IP4:
2109                                 bprintf(bp, " ip4");
2110                                 break;
2111
2112                         case O_ICMP6TYPE:
2113                                 print_icmp6types(bp, (ipfw_insn_u32 *)cmd);
2114                                 break;
2115
2116                         case O_EXT_HDR:
2117                                 print_ext6hdr(bp, (ipfw_insn *)cmd);
2118                                 break;
2119
2120                         case O_TAGGED:
2121                                 if (F_LEN(cmd) == 1)
2122                                         bprint_uint_arg(bp, " tagged ",
2123                                             cmd->arg1);
2124                                 else
2125                                         print_newports(bp, (ipfw_insn_u16 *)cmd,
2126                                             0, O_TAGGED);
2127                                 break;
2128
2129                         default:
2130                                 bprintf(bp, " [opcode %d len %d]",
2131                                     cmd->opcode, cmd->len);
2132                         }
2133                 }
2134                 if (cmd->len & F_OR) {
2135                         bprintf(bp, " or");
2136                         or_block = 1;
2137                 } else if (or_block) {
2138                         bprintf(bp, " }");
2139                         or_block = 0;
2140                 }
2141         }
2142         show_prerequisites(bp, &flags, HAVE_PROTO | HAVE_SRCIP | HAVE_DSTIP
2143                                               | HAVE_IP, 0);
2144         if (comment)
2145                 bprintf(bp, " // %s", comment);
2146         bprintf(bp, "\n");
2147 }
2148
2149 static void
2150 show_dyn_state(struct cmdline_opts *co, struct format_opts *fo,
2151     struct buf_pr *bp, ipfw_dyn_rule *d)
2152 {
2153         struct protoent *pe;
2154         struct in_addr a;
2155         uint16_t rulenum;
2156         char buf[INET6_ADDRSTRLEN];
2157
2158         if (!co->do_expired) {
2159                 if (!d->expire && !(d->dyn_type == O_LIMIT_PARENT))
2160                         return;
2161         }
2162         bcopy(&d->rule, &rulenum, sizeof(rulenum));
2163         bprintf(bp, "%05d", rulenum);
2164         if (fo->pcwidth > 0 || fo->bcwidth > 0) {
2165                 bprintf(bp, " ");
2166                 pr_u64(bp, &d->pcnt, fo->pcwidth);
2167                 pr_u64(bp, &d->bcnt, fo->bcwidth);
2168                 bprintf(bp, "(%ds)", d->expire);
2169         }
2170         switch (d->dyn_type) {
2171         case O_LIMIT_PARENT:
2172                 bprintf(bp, " PARENT %d", d->count);
2173                 break;
2174         case O_LIMIT:
2175                 bprintf(bp, " LIMIT");
2176                 break;
2177         case O_KEEP_STATE: /* bidir, no mask */
2178                 bprintf(bp, " STATE");
2179                 break;
2180         }
2181
2182         if ((pe = getprotobynumber(d->id.proto)) != NULL)
2183                 bprintf(bp, " %s", pe->p_name);
2184         else
2185                 bprintf(bp, " proto %u", d->id.proto);
2186
2187         if (d->id.addr_type == 4) {
2188                 a.s_addr = htonl(d->id.src_ip);
2189                 bprintf(bp, " %s %d", inet_ntoa(a), d->id.src_port);
2190
2191                 a.s_addr = htonl(d->id.dst_ip);
2192                 bprintf(bp, " <-> %s %d", inet_ntoa(a), d->id.dst_port);
2193         } else if (d->id.addr_type == 6) {
2194                 bprintf(bp, " %s %d", inet_ntop(AF_INET6, &d->id.src_ip6, buf,
2195                     sizeof(buf)), d->id.src_port);
2196                 bprintf(bp, " <-> %s %d", inet_ntop(AF_INET6, &d->id.dst_ip6,
2197                     buf, sizeof(buf)), d->id.dst_port);
2198         } else
2199                 bprintf(bp, " UNKNOWN <-> UNKNOWN");
2200         if (d->kidx != 0)
2201                 bprintf(bp, " %s", object_search_ctlv(fo->tstate,
2202                     d->kidx, IPFW_TLV_STATE_NAME));
2203 }
2204
2205 static int
2206 do_range_cmd(int cmd, ipfw_range_tlv *rt)
2207 {
2208         ipfw_range_header rh;
2209         size_t sz;
2210
2211         memset(&rh, 0, sizeof(rh));
2212         memcpy(&rh.range, rt, sizeof(*rt));
2213         rh.range.head.length = sizeof(*rt);
2214         rh.range.head.type = IPFW_TLV_RANGE;
2215         sz = sizeof(rh);
2216
2217         if (do_get3(cmd, &rh.opheader, &sz) != 0)
2218                 return (-1);
2219         /* Save number of matched objects */
2220         rt->new_set = rh.range.new_set;
2221         return (0);
2222 }
2223
2224 /*
2225  * This one handles all set-related commands
2226  *      ipfw set { show | enable | disable }
2227  *      ipfw set swap X Y
2228  *      ipfw set move X to Y
2229  *      ipfw set move rule X to Y
2230  */
2231 void
2232 ipfw_sets_handler(char *av[])
2233 {
2234         uint32_t masks[2];
2235         int i;
2236         uint8_t cmd, rulenum;
2237         ipfw_range_tlv rt;
2238         char *msg;
2239         size_t size;
2240
2241         av++;
2242         memset(&rt, 0, sizeof(rt));
2243
2244         if (av[0] == NULL)
2245                 errx(EX_USAGE, "set needs command");
2246         if (_substrcmp(*av, "show") == 0) {
2247                 struct format_opts fo;
2248                 ipfw_cfg_lheader *cfg;
2249
2250                 memset(&fo, 0, sizeof(fo));
2251                 if (ipfw_get_config(&co, &fo, &cfg, &size) != 0)
2252                         err(EX_OSERR, "requesting config failed");
2253
2254                 for (i = 0, msg = "disable"; i < RESVD_SET; i++)
2255                         if ((cfg->set_mask & (1<<i)) == 0) {
2256                                 printf("%s %d", msg, i);
2257                                 msg = "";
2258                         }
2259                 msg = (cfg->set_mask != (uint32_t)-1) ? " enable" : "enable";
2260                 for (i = 0; i < RESVD_SET; i++)
2261                         if ((cfg->set_mask & (1<<i)) != 0) {
2262                                 printf("%s %d", msg, i);
2263                                 msg = "";
2264                         }
2265                 printf("\n");
2266                 free(cfg);
2267         } else if (_substrcmp(*av, "swap") == 0) {
2268                 av++;
2269                 if ( av[0] == NULL || av[1] == NULL )
2270                         errx(EX_USAGE, "set swap needs 2 set numbers\n");
2271                 rt.set = atoi(av[0]);
2272                 rt.new_set = atoi(av[1]);
2273                 if (!isdigit(*(av[0])) || rt.set > RESVD_SET)
2274                         errx(EX_DATAERR, "invalid set number %s\n", av[0]);
2275                 if (!isdigit(*(av[1])) || rt.new_set > RESVD_SET)
2276                         errx(EX_DATAERR, "invalid set number %s\n", av[1]);
2277                 i = do_range_cmd(IP_FW_SET_SWAP, &rt);
2278         } else if (_substrcmp(*av, "move") == 0) {
2279                 av++;
2280                 if (av[0] && _substrcmp(*av, "rule") == 0) {
2281                         rt.flags = IPFW_RCFLAG_RANGE; /* move rules to new set */
2282                         cmd = IP_FW_XMOVE;
2283                         av++;
2284                 } else
2285                         cmd = IP_FW_SET_MOVE; /* Move set to new one */
2286                 if (av[0] == NULL || av[1] == NULL || av[2] == NULL ||
2287                                 av[3] != NULL ||  _substrcmp(av[1], "to") != 0)
2288                         errx(EX_USAGE, "syntax: set move [rule] X to Y\n");
2289                 rulenum = atoi(av[0]);
2290                 rt.new_set = atoi(av[2]);
2291                 if (cmd == IP_FW_XMOVE) {
2292                         rt.start_rule = rulenum;
2293                         rt.end_rule = rulenum;
2294                 } else
2295                         rt.set = rulenum;
2296                 rt.new_set = atoi(av[2]);
2297                 if (!isdigit(*(av[0])) || (cmd == 3 && rt.set > RESVD_SET) ||
2298                         (cmd == 2 && rt.start_rule == IPFW_DEFAULT_RULE) )
2299                         errx(EX_DATAERR, "invalid source number %s\n", av[0]);
2300                 if (!isdigit(*(av[2])) || rt.new_set > RESVD_SET)
2301                         errx(EX_DATAERR, "invalid dest. set %s\n", av[1]);
2302                 i = do_range_cmd(cmd, &rt);
2303                 if (i < 0)
2304                         err(EX_OSERR, "failed to move %s",
2305                             cmd == IP_FW_SET_MOVE ? "set": "rule");
2306         } else if (_substrcmp(*av, "disable") == 0 ||
2307                    _substrcmp(*av, "enable") == 0 ) {
2308                 int which = _substrcmp(*av, "enable") == 0 ? 1 : 0;
2309
2310                 av++;
2311                 masks[0] = masks[1] = 0;
2312
2313                 while (av[0]) {
2314                         if (isdigit(**av)) {
2315                                 i = atoi(*av);
2316                                 if (i < 0 || i > RESVD_SET)
2317                                         errx(EX_DATAERR,
2318                                             "invalid set number %d\n", i);
2319                                 masks[which] |= (1<<i);
2320                         } else if (_substrcmp(*av, "disable") == 0)
2321                                 which = 0;
2322                         else if (_substrcmp(*av, "enable") == 0)
2323                                 which = 1;
2324                         else
2325                                 errx(EX_DATAERR,
2326                                         "invalid set command %s\n", *av);
2327                         av++;
2328                 }
2329                 if ( (masks[0] & masks[1]) != 0 )
2330                         errx(EX_DATAERR,
2331                             "cannot enable and disable the same set\n");
2332
2333                 rt.set = masks[0];
2334                 rt.new_set = masks[1];
2335                 i = do_range_cmd(IP_FW_SET_ENABLE, &rt);
2336                 if (i)
2337                         warn("set enable/disable: setsockopt(IP_FW_SET_ENABLE)");
2338         } else
2339                 errx(EX_USAGE, "invalid set command %s\n", *av);
2340 }
2341
2342 void
2343 ipfw_sysctl_handler(char *av[], int which)
2344 {
2345         av++;
2346
2347         if (av[0] == NULL) {
2348                 warnx("missing keyword to enable/disable\n");
2349         } else if (_substrcmp(*av, "firewall") == 0) {
2350                 sysctlbyname("net.inet.ip.fw.enable", NULL, 0,
2351                     &which, sizeof(which));
2352                 sysctlbyname("net.inet6.ip6.fw.enable", NULL, 0,
2353                     &which, sizeof(which));
2354         } else if (_substrcmp(*av, "one_pass") == 0) {
2355                 sysctlbyname("net.inet.ip.fw.one_pass", NULL, 0,
2356                     &which, sizeof(which));
2357         } else if (_substrcmp(*av, "debug") == 0) {
2358                 sysctlbyname("net.inet.ip.fw.debug", NULL, 0,
2359                     &which, sizeof(which));
2360         } else if (_substrcmp(*av, "verbose") == 0) {
2361                 sysctlbyname("net.inet.ip.fw.verbose", NULL, 0,
2362                     &which, sizeof(which));
2363         } else if (_substrcmp(*av, "dyn_keepalive") == 0) {
2364                 sysctlbyname("net.inet.ip.fw.dyn_keepalive", NULL, 0,
2365                     &which, sizeof(which));
2366 #ifndef NO_ALTQ
2367         } else if (_substrcmp(*av, "altq") == 0) {
2368                 altq_set_enabled(which);
2369 #endif
2370         } else {
2371                 warnx("unrecognize enable/disable keyword: %s\n", *av);
2372         }
2373 }
2374
2375 typedef void state_cb(struct cmdline_opts *co, struct format_opts *fo,
2376     void *arg, void *state);
2377
2378 static void
2379 prepare_format_dyn(struct cmdline_opts *co, struct format_opts *fo,
2380     void *arg, void *_state)
2381 {
2382         ipfw_dyn_rule *d;
2383         int width;
2384         uint8_t set;
2385
2386         d = (ipfw_dyn_rule *)_state;
2387         /* Count _ALL_ states */
2388         fo->dcnt++;
2389
2390         if (fo->show_counters == 0)
2391                 return;
2392
2393         if (co->use_set) {
2394                 /* skip states from another set */
2395                 bcopy((char *)&d->rule + sizeof(uint16_t), &set,
2396                     sizeof(uint8_t));
2397                 if (set != co->use_set - 1)
2398                         return;
2399         }
2400
2401         width = pr_u64(NULL, &d->pcnt, 0);
2402         if (width > fo->pcwidth)
2403                 fo->pcwidth = width;
2404
2405         width = pr_u64(NULL, &d->bcnt, 0);
2406         if (width > fo->bcwidth)
2407                 fo->bcwidth = width;
2408 }
2409
2410 static int
2411 foreach_state(struct cmdline_opts *co, struct format_opts *fo,
2412     caddr_t base, size_t sz, state_cb dyn_bc, void *dyn_arg)
2413 {
2414         int ttype;
2415         state_cb *fptr;
2416         void *farg;
2417         ipfw_obj_tlv *tlv;
2418         ipfw_obj_ctlv *ctlv;
2419
2420         fptr = NULL;
2421         ttype = 0;
2422
2423         while (sz > 0) {
2424                 ctlv = (ipfw_obj_ctlv *)base;
2425                 switch (ctlv->head.type) {
2426                 case IPFW_TLV_DYNSTATE_LIST:
2427                         base += sizeof(*ctlv);
2428                         sz -= sizeof(*ctlv);
2429                         ttype = IPFW_TLV_DYN_ENT;
2430                         fptr = dyn_bc;
2431                         farg = dyn_arg;
2432                         break;
2433                 default:
2434                         return (sz);
2435                 }
2436
2437                 while (sz > 0) {
2438                         tlv = (ipfw_obj_tlv *)base;
2439                         if (tlv->type != ttype)
2440                                 break;
2441
2442                         fptr(co, fo, farg, tlv + 1);
2443                         sz -= tlv->length;
2444                         base += tlv->length;
2445                 }
2446         }
2447
2448         return (sz);
2449 }
2450
2451 static void
2452 prepare_format_opts(struct cmdline_opts *co, struct format_opts *fo,
2453     ipfw_obj_tlv *rtlv, int rcnt, caddr_t dynbase, size_t dynsz)
2454 {
2455         int bcwidth, pcwidth, width;
2456         int n;
2457         struct ip_fw_bcounter *cntr;
2458         struct ip_fw_rule *r;
2459
2460         bcwidth = 0;
2461         pcwidth = 0;
2462         if (fo->show_counters != 0) {
2463                 for (n = 0; n < rcnt; n++,
2464                     rtlv = (ipfw_obj_tlv *)((caddr_t)rtlv + rtlv->length)) {
2465                         cntr = (struct ip_fw_bcounter *)(rtlv + 1);
2466                         r = (struct ip_fw_rule *)((caddr_t)cntr + cntr->size);
2467                         /* skip rules from another set */
2468                         if (co->use_set && r->set != co->use_set - 1)
2469                                 continue;
2470
2471                         /* packet counter */
2472                         width = pr_u64(NULL, &cntr->pcnt, 0);
2473                         if (width > pcwidth)
2474                                 pcwidth = width;
2475
2476                         /* byte counter */
2477                         width = pr_u64(NULL, &cntr->bcnt, 0);
2478                         if (width > bcwidth)
2479                                 bcwidth = width;
2480                 }
2481         }
2482         fo->bcwidth = bcwidth;
2483         fo->pcwidth = pcwidth;
2484
2485         fo->dcnt = 0;
2486         if (co->do_dynamic && dynsz > 0)
2487                 foreach_state(co, fo, dynbase, dynsz, prepare_format_dyn, NULL);
2488 }
2489
2490 static int
2491 list_static_range(struct cmdline_opts *co, struct format_opts *fo,
2492     struct buf_pr *bp, ipfw_obj_tlv *rtlv, int rcnt)
2493 {
2494         int n, seen;
2495         struct ip_fw_rule *r;
2496         struct ip_fw_bcounter *cntr;
2497         int c = 0;
2498
2499         for (n = seen = 0; n < rcnt; n++,
2500             rtlv = (ipfw_obj_tlv *)((caddr_t)rtlv + rtlv->length)) {
2501
2502                 if ((fo->show_counters | fo->show_time) != 0) {
2503                         cntr = (struct ip_fw_bcounter *)(rtlv + 1);
2504                         r = (struct ip_fw_rule *)((caddr_t)cntr + cntr->size);
2505                 } else {
2506                         cntr = NULL;
2507                         r = (struct ip_fw_rule *)(rtlv + 1);
2508                 }
2509                 if (r->rulenum > fo->last)
2510                         break;
2511                 if (co->use_set && r->set != co->use_set - 1)
2512                         continue;
2513                 if (r->rulenum >= fo->first && r->rulenum <= fo->last) {
2514                         show_static_rule(co, fo, bp, r, cntr);
2515                         printf("%s", bp->buf);
2516                         c += rtlv->length;
2517                         bp_flush(bp);
2518                         seen++;
2519                 }
2520         }
2521
2522         return (seen);
2523 }
2524
2525 static void
2526 list_dyn_state(struct cmdline_opts *co, struct format_opts *fo,
2527     void *_arg, void *_state)
2528 {
2529         uint16_t rulenum;
2530         uint8_t set;
2531         ipfw_dyn_rule *d;
2532         struct buf_pr *bp;
2533
2534         d = (ipfw_dyn_rule *)_state;
2535         bp = (struct buf_pr *)_arg;
2536
2537         bcopy(&d->rule, &rulenum, sizeof(rulenum));
2538         if (rulenum > fo->last)
2539                 return;
2540         if (co->use_set) {
2541                 bcopy((char *)&d->rule + sizeof(uint16_t),
2542                       &set, sizeof(uint8_t));
2543                 if (set != co->use_set - 1)
2544                         return;
2545         }
2546         if (rulenum >= fo->first) {
2547                 show_dyn_state(co, fo, bp, d);
2548                 printf("%s\n", bp->buf);
2549                 bp_flush(bp);
2550         }
2551 }
2552
2553 static int
2554 list_dyn_range(struct cmdline_opts *co, struct format_opts *fo,
2555     struct buf_pr *bp, caddr_t base, size_t sz)
2556 {
2557
2558         sz = foreach_state(co, fo, base, sz, list_dyn_state, bp);
2559         return (sz);
2560 }
2561
2562 void
2563 ipfw_list(int ac, char *av[], int show_counters)
2564 {
2565         ipfw_cfg_lheader *cfg;
2566         struct format_opts sfo;
2567         size_t sz;
2568         int error;
2569         int lac;
2570         char **lav;
2571         uint32_t rnum;
2572         char *endptr;
2573
2574         if (co.test_only) {
2575                 fprintf(stderr, "Testing only, list disabled\n");
2576                 return;
2577         }
2578         if (co.do_pipe) {
2579                 dummynet_list(ac, av, show_counters);
2580                 return;
2581         }
2582
2583         ac--;
2584         av++;
2585         memset(&sfo, 0, sizeof(sfo));
2586
2587         /* Determine rule range to request */
2588         if (ac > 0) {
2589                 for (lac = ac, lav = av; lac != 0; lac--) {
2590                         rnum = strtoul(*lav++, &endptr, 10);
2591                         if (sfo.first == 0 || rnum < sfo.first)
2592                                 sfo.first = rnum;
2593
2594                         if (*endptr == '-')
2595                                 rnum = strtoul(endptr + 1, &endptr, 10);
2596                         if (sfo.last == 0 || rnum > sfo.last)
2597                                 sfo.last = rnum;
2598                 }
2599         }
2600
2601         /* get configuraion from kernel */
2602         cfg = NULL;
2603         sfo.show_counters = show_counters;
2604         sfo.show_time = co.do_time;
2605         sfo.flags = IPFW_CFG_GET_STATIC;
2606         if (co.do_dynamic != 0)
2607                 sfo.flags |= IPFW_CFG_GET_STATES;
2608         if ((sfo.show_counters | sfo.show_time) != 0)
2609                 sfo.flags |= IPFW_CFG_GET_COUNTERS;
2610         if (ipfw_get_config(&co, &sfo, &cfg, &sz) != 0)
2611                 err(EX_OSERR, "retrieving config failed");
2612
2613         error = ipfw_show_config(&co, &sfo, cfg, sz, ac, av);
2614
2615         free(cfg);
2616
2617         if (error != EX_OK)
2618                 exit(error);
2619 }
2620
2621 static int
2622 ipfw_show_config(struct cmdline_opts *co, struct format_opts *fo,
2623     ipfw_cfg_lheader *cfg, size_t sz, int ac, char *av[])
2624 {
2625         caddr_t dynbase;
2626         size_t dynsz;
2627         int rcnt;
2628         int exitval = EX_OK;
2629         int lac;
2630         char **lav;
2631         char *endptr;
2632         size_t readsz;
2633         struct buf_pr bp;
2634         ipfw_obj_ctlv *ctlv, *tstate;
2635         ipfw_obj_tlv *rbase;
2636
2637         /*
2638          * Handle tablenames TLV first, if any
2639          */
2640         tstate = NULL;
2641         rbase = NULL;
2642         dynbase = NULL;
2643         dynsz = 0;
2644         readsz = sizeof(*cfg);
2645         rcnt = 0;
2646
2647         fo->set_mask = cfg->set_mask;
2648
2649         ctlv = (ipfw_obj_ctlv *)(cfg + 1);
2650
2651         if (cfg->flags & IPFW_CFG_GET_STATIC) {
2652                 /* We've requested static rules */
2653                 if (ctlv->head.type == IPFW_TLV_TBLNAME_LIST) {
2654                         object_sort_ctlv(ctlv);
2655                         fo->tstate = ctlv;
2656                         readsz += ctlv->head.length;
2657                         ctlv = (ipfw_obj_ctlv *)((caddr_t)ctlv +
2658                             ctlv->head.length);
2659                 }
2660
2661                 if (ctlv->head.type == IPFW_TLV_RULE_LIST) {
2662                         rbase = (ipfw_obj_tlv *)(ctlv + 1);
2663                         rcnt = ctlv->count;
2664                         readsz += ctlv->head.length;
2665                         ctlv = (ipfw_obj_ctlv *)((caddr_t)ctlv +
2666                             ctlv->head.length);
2667                 }
2668         }
2669
2670         if ((cfg->flags & IPFW_CFG_GET_STATES) && (readsz != sz))  {
2671                 /* We may have some dynamic states */
2672                 dynsz = sz - readsz;
2673                 /* Skip empty header */
2674                 if (dynsz != sizeof(ipfw_obj_ctlv))
2675                         dynbase = (caddr_t)ctlv;
2676                 else
2677                         dynsz = 0;
2678         }
2679
2680         prepare_format_opts(co, fo, rbase, rcnt, dynbase, dynsz);
2681         bp_alloc(&bp, 4096);
2682
2683         /* if no rule numbers were specified, list all rules */
2684         if (ac == 0) {
2685                 fo->first = 0;
2686                 fo->last = IPFW_DEFAULT_RULE;
2687                 list_static_range(co, fo, &bp, rbase, rcnt);
2688
2689                 if (co->do_dynamic && dynsz > 0) {
2690                         printf("## Dynamic rules (%d %zu):\n", fo->dcnt, dynsz);
2691                         list_dyn_range(co, fo, &bp, dynbase, dynsz);
2692                 }
2693
2694                 bp_free(&bp);
2695                 return (EX_OK);
2696         }
2697
2698         /* display specific rules requested on command line */
2699         for (lac = ac, lav = av; lac != 0; lac--) {
2700                 /* convert command line rule # */
2701                 fo->last = fo->first = strtoul(*lav++, &endptr, 10);
2702                 if (*endptr == '-')
2703                         fo->last = strtoul(endptr + 1, &endptr, 10);
2704                 if (*endptr) {
2705                         exitval = EX_USAGE;
2706                         warnx("invalid rule number: %s", *(lav - 1));
2707                         continue;
2708                 }
2709
2710                 if (list_static_range(co, fo, &bp, rbase, rcnt) == 0) {
2711                         /* give precedence to other error(s) */
2712                         if (exitval == EX_OK)
2713                                 exitval = EX_UNAVAILABLE;
2714                         if (fo->first == fo->last)
2715                                 warnx("rule %u does not exist", fo->first);
2716                         else
2717                                 warnx("no rules in range %u-%u",
2718                                     fo->first, fo->last);
2719                 }
2720         }
2721
2722         if (co->do_dynamic && dynsz > 0) {
2723                 printf("## Dynamic rules:\n");
2724                 for (lac = ac, lav = av; lac != 0; lac--) {
2725                         fo->last = fo->first = strtoul(*lav++, &endptr, 10);
2726                         if (*endptr == '-')
2727                                 fo->last = strtoul(endptr+1, &endptr, 10);
2728                         if (*endptr)
2729                                 /* already warned */
2730                                 continue;
2731                         list_dyn_range(co, fo, &bp, dynbase, dynsz);
2732                 }
2733         }
2734
2735         bp_free(&bp);
2736         return (exitval);
2737 }
2738
2739
2740 /*
2741  * Retrieves current ipfw configuration of given type
2742  * and stores its pointer to @pcfg.
2743  *
2744  * Caller is responsible for freeing @pcfg.
2745  *
2746  * Returns 0 on success.
2747  */
2748
2749 static int
2750 ipfw_get_config(struct cmdline_opts *co, struct format_opts *fo,
2751     ipfw_cfg_lheader **pcfg, size_t *psize)
2752 {
2753         ipfw_cfg_lheader *cfg;
2754         size_t sz;
2755         int i;
2756
2757
2758         if (co->test_only != 0) {
2759                 fprintf(stderr, "Testing only, list disabled\n");
2760                 return (0);
2761         }
2762
2763         /* Start with some data size */
2764         sz = 4096;
2765         cfg = NULL;
2766
2767         for (i = 0; i < 16; i++) {
2768                 if (cfg != NULL)
2769                         free(cfg);
2770                 if ((cfg = calloc(1, sz)) == NULL)
2771                         return (ENOMEM);
2772
2773                 cfg->flags = fo->flags;
2774                 cfg->start_rule = fo->first;
2775                 cfg->end_rule = fo->last;
2776
2777                 if (do_get3(IP_FW_XGET, &cfg->opheader, &sz) != 0) {
2778                         if (errno != ENOMEM) {
2779                                 free(cfg);
2780                                 return (errno);
2781                         }
2782
2783                         /* Buffer size is not enough. Try to increase */
2784                         sz = sz * 2;
2785                         if (sz < cfg->size)
2786                                 sz = cfg->size;
2787                         continue;
2788                 }
2789
2790                 *pcfg = cfg;
2791                 *psize = sz;
2792                 return (0);
2793         }
2794
2795         free(cfg);
2796         return (ENOMEM);
2797 }
2798
2799 static int
2800 lookup_host (char *host, struct in_addr *ipaddr)
2801 {
2802         struct hostent *he;
2803
2804         if (!inet_aton(host, ipaddr)) {
2805                 if ((he = gethostbyname(host)) == NULL)
2806                         return(-1);
2807                 *ipaddr = *(struct in_addr *)he->h_addr_list[0];
2808         }
2809         return(0);
2810 }
2811
2812 struct tidx {
2813         ipfw_obj_ntlv *idx;
2814         uint32_t count;
2815         uint32_t size;
2816         uint16_t counter;
2817         uint8_t set;
2818 };
2819
2820 int
2821 ipfw_check_object_name(const char *name)
2822 {
2823         int c, i, l;
2824
2825         /*
2826          * Check that name is null-terminated and contains
2827          * valid symbols only. Valid mask is:
2828          * [a-zA-Z0-9\-_\.]{1,63}
2829          */
2830         l = strlen(name);
2831         if (l == 0 || l >= 64)
2832                 return (EINVAL);
2833         for (i = 0; i < l; i++) {
2834                 c = name[i];
2835                 if (isalpha(c) || isdigit(c) || c == '_' ||
2836                     c == '-' || c == '.')
2837                         continue;
2838                 return (EINVAL);
2839         }
2840         return (0);
2841 }
2842
2843 static char *default_state_name = "default";
2844 static int
2845 state_check_name(const char *name)
2846 {
2847
2848         if (ipfw_check_object_name(name) != 0)
2849                 return (EINVAL);
2850         if (strcmp(name, "any") == 0)
2851                 return (EINVAL);
2852         return (0);
2853 }
2854
2855 static int
2856 eaction_check_name(const char *name)
2857 {
2858
2859         if (ipfw_check_object_name(name) != 0)
2860                 return (EINVAL);
2861         /* Restrict some 'special' names */
2862         if (match_token(rule_actions, name) != -1 &&
2863             match_token(rule_action_params, name) != -1)
2864                 return (EINVAL);
2865         return (0);
2866 }
2867
2868 static uint16_t
2869 pack_object(struct tidx *tstate, char *name, int otype)
2870 {
2871         int i;
2872         ipfw_obj_ntlv *ntlv;
2873
2874         for (i = 0; i < tstate->count; i++) {
2875                 if (strcmp(tstate->idx[i].name, name) != 0)
2876                         continue;
2877                 if (tstate->idx[i].set != tstate->set)
2878                         continue;
2879                 if (tstate->idx[i].head.type != otype)
2880                         continue;
2881
2882                 return (tstate->idx[i].idx);
2883         }
2884
2885         if (tstate->count + 1 > tstate->size) {
2886                 tstate->size += 4;
2887                 tstate->idx = realloc(tstate->idx, tstate->size *
2888                     sizeof(ipfw_obj_ntlv));
2889                 if (tstate->idx == NULL)
2890                         return (0);
2891         }
2892
2893         ntlv = &tstate->idx[i];
2894         memset(ntlv, 0, sizeof(ipfw_obj_ntlv));
2895         strlcpy(ntlv->name, name, sizeof(ntlv->name));
2896         ntlv->head.type = otype;
2897         ntlv->head.length = sizeof(ipfw_obj_ntlv);
2898         ntlv->set = tstate->set;
2899         ntlv->idx = ++tstate->counter;
2900         tstate->count++;
2901
2902         return (ntlv->idx);
2903 }
2904
2905 static uint16_t
2906 pack_table(struct tidx *tstate, char *name)
2907 {
2908
2909         if (table_check_name(name) != 0)
2910                 return (0);
2911
2912         return (pack_object(tstate, name, IPFW_TLV_TBL_NAME));
2913 }
2914
2915 void
2916 fill_table(struct _ipfw_insn *cmd, char *av, uint8_t opcode,
2917     struct tidx *tstate)
2918 {
2919         uint32_t *d = ((ipfw_insn_u32 *)cmd)->d;
2920         uint16_t uidx;
2921         char *p;
2922
2923         if ((p = strchr(av + 6, ')')) == NULL)
2924                 errx(EX_DATAERR, "forgotten parenthesis: '%s'", av);
2925         *p = '\0';
2926         p = strchr(av + 6, ',');
2927         if (p)
2928                 *p++ = '\0';
2929
2930         if ((uidx = pack_table(tstate, av + 6)) == 0)
2931                 errx(EX_DATAERR, "Invalid table name: %s", av + 6);
2932
2933         cmd->opcode = opcode;
2934         cmd->arg1 = uidx;
2935         if (p) {
2936                 cmd->len |= F_INSN_SIZE(ipfw_insn_u32);
2937                 d[0] = strtoul(p, NULL, 0);
2938         } else
2939                 cmd->len |= F_INSN_SIZE(ipfw_insn);
2940 }
2941
2942
2943 /*
2944  * fills the addr and mask fields in the instruction as appropriate from av.
2945  * Update length as appropriate.
2946  * The following formats are allowed:
2947  *      me      returns O_IP_*_ME
2948  *      1.2.3.4         single IP address
2949  *      1.2.3.4:5.6.7.8 address:mask
2950  *      1.2.3.4/24      address/mask
2951  *      1.2.3.4/26{1,6,5,4,23}  set of addresses in a subnet
2952  * We can have multiple comma-separated address/mask entries.
2953  */
2954 static void
2955 fill_ip(ipfw_insn_ip *cmd, char *av, int cblen, struct tidx *tstate)
2956 {
2957         int len = 0;
2958         uint32_t *d = ((ipfw_insn_u32 *)cmd)->d;
2959
2960         cmd->o.len &= ~F_LEN_MASK;      /* zero len */
2961
2962         if (_substrcmp(av, "any") == 0)
2963                 return;
2964
2965         if (_substrcmp(av, "me") == 0) {
2966                 cmd->o.len |= F_INSN_SIZE(ipfw_insn);
2967                 return;
2968         }
2969
2970         if (strncmp(av, "table(", 6) == 0) {
2971                 fill_table(&cmd->o, av, O_IP_DST_LOOKUP, tstate);
2972                 return;
2973         }
2974
2975     while (av) {
2976         /*
2977          * After the address we can have '/' or ':' indicating a mask,
2978          * ',' indicating another address follows, '{' indicating a
2979          * set of addresses of unspecified size.
2980          */
2981         char *t = NULL, *p = strpbrk(av, "/:,{");
2982         int masklen;
2983         char md, nd = '\0';
2984
2985         CHECK_LENGTH(cblen, F_INSN_SIZE(ipfw_insn) + 2 + len);
2986
2987         if (p) {
2988                 md = *p;
2989                 *p++ = '\0';
2990                 if ((t = strpbrk(p, ",{")) != NULL) {
2991                         nd = *t;
2992                         *t = '\0';
2993                 }
2994         } else
2995                 md = '\0';
2996
2997         if (lookup_host(av, (struct in_addr *)&d[0]) != 0)
2998                 errx(EX_NOHOST, "hostname ``%s'' unknown", av);
2999         switch (md) {
3000         case ':':
3001                 if (!inet_aton(p, (struct in_addr *)&d[1]))
3002                         errx(EX_DATAERR, "bad netmask ``%s''", p);
3003                 break;
3004         case '/':
3005                 masklen = atoi(p);
3006                 if (masklen == 0)
3007                         d[1] = htonl(0U);       /* mask */
3008                 else if (masklen > 32)
3009                         errx(EX_DATAERR, "bad width ``%s''", p);
3010                 else
3011                         d[1] = htonl(~0U << (32 - masklen));
3012                 break;
3013         case '{':       /* no mask, assume /24 and put back the '{' */
3014                 d[1] = htonl(~0U << (32 - 24));
3015                 *(--p) = md;
3016                 break;
3017
3018         case ',':       /* single address plus continuation */
3019                 *(--p) = md;
3020                 /* FALLTHROUGH */
3021         case 0:         /* initialization value */
3022         default:
3023                 d[1] = htonl(~0U);      /* force /32 */
3024                 break;
3025         }
3026         d[0] &= d[1];           /* mask base address with mask */
3027         if (t)
3028                 *t = nd;
3029         /* find next separator */
3030         if (p)
3031                 p = strpbrk(p, ",{");
3032         if (p && *p == '{') {
3033                 /*
3034                  * We have a set of addresses. They are stored as follows:
3035                  *   arg1       is the set size (powers of 2, 2..256)
3036                  *   addr       is the base address IN HOST FORMAT
3037                  *   mask..     is an array of arg1 bits (rounded up to
3038                  *              the next multiple of 32) with bits set
3039                  *              for each host in the map.
3040                  */
3041                 uint32_t *map = (uint32_t *)&cmd->mask;
3042                 int low, high;
3043                 int i = contigmask((uint8_t *)&(d[1]), 32);
3044
3045                 if (len > 0)
3046                         errx(EX_DATAERR, "address set cannot be in a list");
3047                 if (i < 24 || i > 31)
3048                         errx(EX_DATAERR, "invalid set with mask %d\n", i);
3049                 cmd->o.arg1 = 1<<(32-i);        /* map length           */
3050                 d[0] = ntohl(d[0]);             /* base addr in host format */
3051                 cmd->o.opcode = O_IP_DST_SET;   /* default */
3052                 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32) + (cmd->o.arg1+31)/32;
3053                 for (i = 0; i < (cmd->o.arg1+31)/32 ; i++)
3054                         map[i] = 0;     /* clear map */
3055
3056                 av = p + 1;
3057                 low = d[0] & 0xff;
3058                 high = low + cmd->o.arg1 - 1;
3059                 /*
3060                  * Here, i stores the previous value when we specify a range
3061                  * of addresses within a mask, e.g. 45-63. i = -1 means we
3062                  * have no previous value.
3063                  */
3064                 i = -1; /* previous value in a range */
3065                 while (isdigit(*av)) {
3066                         char *s;
3067                         int a = strtol(av, &s, 0);
3068
3069                         if (s == av) { /* no parameter */
3070                             if (*av != '}')
3071                                 errx(EX_DATAERR, "set not closed\n");
3072                             if (i != -1)
3073                                 errx(EX_DATAERR, "incomplete range %d-", i);
3074                             break;
3075                         }
3076                         if (a < low || a > high)
3077                             errx(EX_DATAERR, "addr %d out of range [%d-%d]\n",
3078                                 a, low, high);
3079                         a -= low;
3080                         if (i == -1)    /* no previous in range */
3081                             i = a;
3082                         else {          /* check that range is valid */
3083                             if (i > a)
3084                                 errx(EX_DATAERR, "invalid range %d-%d",
3085                                         i+low, a+low);
3086                             if (*s == '-')
3087                                 errx(EX_DATAERR, "double '-' in range");
3088                         }
3089                         for (; i <= a; i++)
3090                             map[i/32] |= 1<<(i & 31);
3091                         i = -1;
3092                         if (*s == '-')
3093                             i = a;
3094                         else if (*s == '}')
3095                             break;
3096                         av = s+1;
3097                 }
3098                 return;
3099         }
3100         av = p;
3101         if (av)                 /* then *av must be a ',' */
3102                 av++;
3103
3104         /* Check this entry */
3105         if (d[1] == 0) { /* "any", specified as x.x.x.x/0 */
3106                 /*
3107                  * 'any' turns the entire list into a NOP.
3108                  * 'not any' never matches, so it is removed from the
3109                  * list unless it is the only item, in which case we
3110                  * report an error.
3111                  */
3112                 if (cmd->o.len & F_NOT) {       /* "not any" never matches */
3113                         if (av == NULL && len == 0) /* only this entry */
3114                                 errx(EX_DATAERR, "not any never matches");
3115                 }
3116                 /* else do nothing and skip this entry */
3117                 return;
3118         }
3119         /* A single IP can be stored in an optimized format */
3120         if (d[1] == (uint32_t)~0 && av == NULL && len == 0) {
3121                 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32);
3122                 return;
3123         }
3124         len += 2;       /* two words... */
3125         d += 2;
3126     } /* end while */
3127     if (len + 1 > F_LEN_MASK)
3128         errx(EX_DATAERR, "address list too long");
3129     cmd->o.len |= len+1;
3130 }
3131
3132
3133 /* n2mask sets n bits of the mask */
3134 void
3135 n2mask(struct in6_addr *mask, int n)
3136 {
3137         static int      minimask[9] =
3138             { 0x00, 0x80, 0xc0, 0xe0, 0xf0, 0xf8, 0xfc, 0xfe, 0xff };
3139         u_char          *p;
3140
3141         memset(mask, 0, sizeof(struct in6_addr));
3142         p = (u_char *) mask;
3143         for (; n > 0; p++, n -= 8) {
3144                 if (n >= 8)
3145                         *p = 0xff;
3146                 else
3147                         *p = minimask[n];
3148         }
3149         return;
3150 }
3151
3152 static void
3153 fill_flags_cmd(ipfw_insn *cmd, enum ipfw_opcodes opcode,
3154         struct _s_x *flags, char *p)
3155 {
3156         char *e;
3157         uint32_t set = 0, clear = 0;
3158
3159         if (fill_flags(flags, p, &e, &set, &clear) != 0)
3160                 errx(EX_DATAERR, "invalid flag %s", e);
3161
3162         cmd->opcode = opcode;
3163         cmd->len =  (cmd->len & (F_NOT | F_OR)) | 1;
3164         cmd->arg1 = (set & 0xff) | ( (clear & 0xff) << 8);
3165 }
3166
3167
3168 void
3169 ipfw_delete(char *av[])
3170 {
3171         int i, j;
3172         int exitval = EX_OK;
3173         int do_set = 0;
3174         char *sep;
3175         ipfw_range_tlv rt;
3176
3177         av++;
3178         NEED1("missing rule specification");
3179         memset(&rt, 0, sizeof(rt));
3180         if ( *av && _substrcmp(*av, "set") == 0) {
3181                 /* Do not allow using the following syntax:
3182                  *      ipfw set N delete set M
3183                  */
3184                 if (co.use_set)
3185                         errx(EX_DATAERR, "invalid syntax");
3186                 do_set = 1;     /* delete set */
3187                 av++;
3188         }
3189
3190         /* Rule number */
3191         while (*av && isdigit(**av)) {
3192                 i = strtol(*av, &sep, 10);
3193                 j = i;
3194                 if (*sep== '-')
3195                         j = strtol(sep + 1, NULL, 10);
3196                 av++;
3197                 if (co.do_nat) {
3198                         exitval = do_cmd(IP_FW_NAT_DEL, &i, sizeof i);
3199                         if (exitval) {
3200                                 exitval = EX_UNAVAILABLE;
3201                                 warn("rule %u not available", i);
3202                         }
3203                 } else if (co.do_pipe) {
3204                         exitval = ipfw_delete_pipe(co.do_pipe, i);
3205                 } else {
3206                         if (do_set != 0) {
3207                                 rt.set = i & 31;
3208                                 rt.flags = IPFW_RCFLAG_SET;
3209                         } else {
3210                                 rt.start_rule = i & 0xffff;
3211                                 rt.end_rule = j & 0xffff;
3212                                 if (rt.start_rule == 0 && rt.end_rule == 0)
3213                                         rt.flags |= IPFW_RCFLAG_ALL;
3214                                 else
3215                                         rt.flags |= IPFW_RCFLAG_RANGE;
3216                                 if (co.use_set != 0) {
3217                                         rt.set = co.use_set - 1;
3218                                         rt.flags |= IPFW_RCFLAG_SET;
3219                                 }
3220                         }
3221                         i = do_range_cmd(IP_FW_XDEL, &rt);
3222                         if (i != 0) {
3223                                 exitval = EX_UNAVAILABLE;
3224                                 warn("rule %u: setsockopt(IP_FW_XDEL)",
3225                                     rt.start_rule);
3226                         } else if (rt.new_set == 0 && do_set == 0) {
3227                                 exitval = EX_UNAVAILABLE;
3228                                 if (rt.start_rule != rt.end_rule)
3229                                         warnx("no rules rules in %u-%u range",
3230                                             rt.start_rule, rt.end_rule);
3231                                 else
3232                                         warnx("rule %u not found",
3233                                             rt.start_rule);
3234                         }
3235                 }
3236         }
3237         if (exitval != EX_OK)
3238                 exit(exitval);
3239 }
3240
3241
3242 /*
3243  * fill the interface structure. We do not check the name as we can
3244  * create interfaces dynamically, so checking them at insert time
3245  * makes relatively little sense.
3246  * Interface names containing '*', '?', or '[' are assumed to be shell
3247  * patterns which match interfaces.
3248  */
3249 static void
3250 fill_iface(ipfw_insn_if *cmd, char *arg, int cblen, struct tidx *tstate)
3251 {
3252         char *p;
3253         uint16_t uidx;
3254
3255         cmd->name[0] = '\0';
3256         cmd->o.len |= F_INSN_SIZE(ipfw_insn_if);
3257
3258         CHECK_CMDLEN;
3259
3260         /* Parse the interface or address */
3261         if (strcmp(arg, "any") == 0)
3262                 cmd->o.len = 0;         /* effectively ignore this command */
3263         else if (strncmp(arg, "table(", 6) == 0) {
3264                 if ((p = strchr(arg + 6, ')')) == NULL)
3265                         errx(EX_DATAERR, "forgotten parenthesis: '%s'", arg);
3266                 *p = '\0';
3267                 p = strchr(arg + 6, ',');
3268                 if (p)
3269                         *p++ = '\0';
3270                 if ((uidx = pack_table(tstate, arg + 6)) == 0)
3271                         errx(EX_DATAERR, "Invalid table name: %s", arg + 6);
3272
3273                 cmd->name[0] = '\1'; /* Special value indicating table */
3274                 cmd->p.kidx = uidx;
3275         } else if (!isdigit(*arg)) {
3276                 strlcpy(cmd->name, arg, sizeof(cmd->name));
3277                 cmd->p.glob = strpbrk(arg, "*?[") != NULL ? 1 : 0;
3278         } else if (!inet_aton(arg, &cmd->p.ip))
3279                 errx(EX_DATAERR, "bad ip address ``%s''", arg);
3280 }
3281
3282 static void
3283 get_mac_addr_mask(const char *p, uint8_t *addr, uint8_t *mask)
3284 {
3285         int i;
3286         size_t l;
3287         char *ap, *ptr, *optr;
3288         struct ether_addr *mac;
3289         const char *macset = "0123456789abcdefABCDEF:";
3290
3291         if (strcmp(p, "any") == 0) {
3292                 for (i = 0; i < ETHER_ADDR_LEN; i++)
3293                         addr[i] = mask[i] = 0;
3294                 return;
3295         }
3296
3297         optr = ptr = strdup(p);
3298         if ((ap = strsep(&ptr, "&/")) != NULL && *ap != 0) {
3299                 l = strlen(ap);
3300                 if (strspn(ap, macset) != l || (mac = ether_aton(ap)) == NULL)
3301                         errx(EX_DATAERR, "Incorrect MAC address");
3302                 bcopy(mac, addr, ETHER_ADDR_LEN);
3303         } else
3304                 errx(EX_DATAERR, "Incorrect MAC address");
3305
3306         if (ptr != NULL) { /* we have mask? */
3307                 if (p[ptr - optr - 1] == '/') { /* mask len */
3308                         long ml = strtol(ptr, &ap, 10);
3309                         if (*ap != 0 || ml > ETHER_ADDR_LEN * 8 || ml < 0)
3310                                 errx(EX_DATAERR, "Incorrect mask length");
3311                         for (i = 0; ml > 0 && i < ETHER_ADDR_LEN; ml -= 8, i++)
3312                                 mask[i] = (ml >= 8) ? 0xff: (~0) << (8 - ml);
3313                 } else { /* mask */
3314                         l = strlen(ptr);
3315                         if (strspn(ptr, macset) != l ||
3316                             (mac = ether_aton(ptr)) == NULL)
3317                                 errx(EX_DATAERR, "Incorrect mask");
3318                         bcopy(mac, mask, ETHER_ADDR_LEN);
3319                 }
3320         } else { /* default mask: ff:ff:ff:ff:ff:ff */
3321                 for (i = 0; i < ETHER_ADDR_LEN; i++)
3322                         mask[i] = 0xff;
3323         }
3324         for (i = 0; i < ETHER_ADDR_LEN; i++)
3325                 addr[i] &= mask[i];
3326
3327         free(optr);
3328 }
3329
3330 /*
3331  * helper function, updates the pointer to cmd with the length
3332  * of the current command, and also cleans up the first word of
3333  * the new command in case it has been clobbered before.
3334  */
3335 static ipfw_insn *
3336 next_cmd(ipfw_insn *cmd, int *len)
3337 {
3338         *len -= F_LEN(cmd);
3339         CHECK_LENGTH(*len, 0);
3340         cmd += F_LEN(cmd);
3341         bzero(cmd, sizeof(*cmd));
3342         return cmd;
3343 }
3344
3345 /*
3346  * Takes arguments and copies them into a comment
3347  */
3348 static void
3349 fill_comment(ipfw_insn *cmd, char **av, int cblen)
3350 {
3351         int i, l;
3352         char *p = (char *)(cmd + 1);
3353
3354         cmd->opcode = O_NOP;
3355         cmd->len =  (cmd->len & (F_NOT | F_OR));
3356
3357         /* Compute length of comment string. */
3358         for (i = 0, l = 0; av[i] != NULL; i++)
3359                 l += strlen(av[i]) + 1;
3360         if (l == 0)
3361                 return;
3362         if (l > 84)
3363                 errx(EX_DATAERR,
3364                     "comment too long (max 80 chars)");
3365         l = 1 + (l+3)/4;
3366         cmd->len =  (cmd->len & (F_NOT | F_OR)) | l;
3367         CHECK_CMDLEN;
3368
3369         for (i = 0; av[i] != NULL; i++) {
3370                 strcpy(p, av[i]);
3371                 p += strlen(av[i]);
3372                 *p++ = ' ';
3373         }
3374         *(--p) = '\0';
3375 }
3376
3377 /*
3378  * A function to fill simple commands of size 1.
3379  * Existing flags are preserved.
3380  */
3381 static void
3382 fill_cmd(ipfw_insn *cmd, enum ipfw_opcodes opcode, int flags, uint16_t arg)
3383 {
3384         cmd->opcode = opcode;
3385         cmd->len =  ((cmd->len | flags) & (F_NOT | F_OR)) | 1;
3386         cmd->arg1 = arg;
3387 }
3388
3389 /*
3390  * Fetch and add the MAC address and type, with masks. This generates one or
3391  * two microinstructions, and returns the pointer to the last one.
3392  */
3393 static ipfw_insn *
3394 add_mac(ipfw_insn *cmd, char *av[], int cblen)
3395 {
3396         ipfw_insn_mac *mac;
3397
3398         if ( ( av[0] == NULL ) || ( av[1] == NULL ) )
3399                 errx(EX_DATAERR, "MAC dst src");
3400
3401         cmd->opcode = O_MACADDR2;
3402         cmd->len = (cmd->len & (F_NOT | F_OR)) | F_INSN_SIZE(ipfw_insn_mac);
3403         CHECK_CMDLEN;
3404
3405         mac = (ipfw_insn_mac *)cmd;
3406         get_mac_addr_mask(av[0], mac->addr, mac->mask); /* dst */
3407         get_mac_addr_mask(av[1], &(mac->addr[ETHER_ADDR_LEN]),
3408             &(mac->mask[ETHER_ADDR_LEN])); /* src */
3409         return cmd;
3410 }
3411
3412 static ipfw_insn *
3413 add_mactype(ipfw_insn *cmd, char *av, int cblen)
3414 {
3415         if (!av)
3416                 errx(EX_DATAERR, "missing MAC type");
3417         if (strcmp(av, "any") != 0) { /* we have a non-null type */
3418                 fill_newports((ipfw_insn_u16 *)cmd, av, IPPROTO_ETHERTYPE,
3419                     cblen);
3420                 cmd->opcode = O_MAC_TYPE;
3421                 return cmd;
3422         } else
3423                 return NULL;
3424 }
3425
3426 static ipfw_insn *
3427 add_proto0(ipfw_insn *cmd, char *av, u_char *protop)
3428 {
3429         struct protoent *pe;
3430         char *ep;
3431         int proto;
3432
3433         proto = strtol(av, &ep, 10);
3434         if (*ep != '\0' || proto <= 0) {
3435                 if ((pe = getprotobyname(av)) == NULL)
3436                         return NULL;
3437                 proto = pe->p_proto;
3438         }
3439
3440         fill_cmd(cmd, O_PROTO, 0, proto);
3441         *protop = proto;
3442         return cmd;
3443 }
3444
3445 static ipfw_insn *
3446 add_proto(ipfw_insn *cmd, char *av, u_char *protop)
3447 {
3448         u_char proto = IPPROTO_IP;
3449
3450         if (_substrcmp(av, "all") == 0 || strcmp(av, "ip") == 0)
3451                 ; /* do not set O_IP4 nor O_IP6 */
3452         else if (strcmp(av, "ip4") == 0)
3453                 /* explicit "just IPv4" rule */
3454                 fill_cmd(cmd, O_IP4, 0, 0);
3455         else if (strcmp(av, "ip6") == 0) {
3456                 /* explicit "just IPv6" rule */
3457                 proto = IPPROTO_IPV6;
3458                 fill_cmd(cmd, O_IP6, 0, 0);
3459         } else
3460                 return add_proto0(cmd, av, protop);
3461
3462         *protop = proto;
3463         return cmd;
3464 }
3465
3466 static ipfw_insn *
3467 add_proto_compat(ipfw_insn *cmd, char *av, u_char *protop)
3468 {
3469         u_char proto = IPPROTO_IP;
3470
3471         if (_substrcmp(av, "all") == 0 || strcmp(av, "ip") == 0)
3472                 ; /* do not set O_IP4 nor O_IP6 */
3473         else if (strcmp(av, "ipv4") == 0 || strcmp(av, "ip4") == 0)
3474                 /* explicit "just IPv4" rule */
3475                 fill_cmd(cmd, O_IP4, 0, 0);
3476         else if (strcmp(av, "ipv6") == 0 || strcmp(av, "ip6") == 0) {
3477                 /* explicit "just IPv6" rule */
3478                 proto = IPPROTO_IPV6;
3479                 fill_cmd(cmd, O_IP6, 0, 0);
3480         } else
3481                 return add_proto0(cmd, av, protop);
3482
3483         *protop = proto;
3484         return cmd;
3485 }
3486
3487 static ipfw_insn *
3488 add_srcip(ipfw_insn *cmd, char *av, int cblen, struct tidx *tstate)
3489 {
3490         fill_ip((ipfw_insn_ip *)cmd, av, cblen, tstate);
3491         if (cmd->opcode == O_IP_DST_SET)                        /* set */
3492                 cmd->opcode = O_IP_SRC_SET;
3493         else if (cmd->opcode == O_IP_DST_LOOKUP)                /* table */
3494                 cmd->opcode = O_IP_SRC_LOOKUP;
3495         else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn))          /* me */
3496                 cmd->opcode = O_IP_SRC_ME;
3497         else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_u32))      /* one IP */
3498                 cmd->opcode = O_IP_SRC;
3499         else                                                    /* addr/mask */
3500                 cmd->opcode = O_IP_SRC_MASK;
3501         return cmd;
3502 }
3503
3504 static ipfw_insn *
3505 add_dstip(ipfw_insn *cmd, char *av, int cblen, struct tidx *tstate)
3506 {
3507         fill_ip((ipfw_insn_ip *)cmd, av, cblen, tstate);
3508         if (cmd->opcode == O_IP_DST_SET)                        /* set */
3509                 ;
3510         else if (cmd->opcode == O_IP_DST_LOOKUP)                /* table */
3511                 ;
3512         else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn))          /* me */
3513                 cmd->opcode = O_IP_DST_ME;
3514         else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_u32))      /* one IP */
3515                 cmd->opcode = O_IP_DST;
3516         else                                                    /* addr/mask */
3517                 cmd->opcode = O_IP_DST_MASK;
3518         return cmd;
3519 }
3520
3521 static struct _s_x f_reserved_keywords[] = {
3522         { "altq",       TOK_OR },
3523         { "//",         TOK_OR },
3524         { "diverted",   TOK_OR },
3525         { "dst-port",   TOK_OR },
3526         { "src-port",   TOK_OR },
3527         { "established",        TOK_OR },
3528         { "keep-state", TOK_OR },
3529         { "frag",       TOK_OR },
3530         { "icmptypes",  TOK_OR },
3531         { "in",         TOK_OR },
3532         { "out",        TOK_OR },
3533         { "ip6",        TOK_OR },
3534         { "any",        TOK_OR },
3535         { "to",         TOK_OR },
3536         { "via",        TOK_OR },
3537         { "{",          TOK_OR },
3538         { NULL, 0 }     /* terminator */
3539 };
3540
3541 static ipfw_insn *
3542 add_ports(ipfw_insn *cmd, char *av, u_char proto, int opcode, int cblen)
3543 {
3544
3545         if (match_token(f_reserved_keywords, av) != -1)
3546                 return (NULL);
3547
3548         if (fill_newports((ipfw_insn_u16 *)cmd, av, proto, cblen)) {
3549                 /* XXX todo: check that we have a protocol with ports */
3550                 cmd->opcode = opcode;
3551                 return cmd;
3552         }
3553         return NULL;
3554 }
3555
3556 static ipfw_insn *
3557 add_src(ipfw_insn *cmd, char *av, u_char proto, int cblen, struct tidx *tstate)
3558 {
3559         struct in6_addr a;
3560         char *host, *ch, buf[INET6_ADDRSTRLEN];
3561         ipfw_insn *ret = NULL;
3562         int len;
3563
3564         /* Copy first address in set if needed */
3565         if ((ch = strpbrk(av, "/,")) != NULL) {
3566                 len = ch - av;
3567                 strlcpy(buf, av, sizeof(buf));
3568                 if (len < sizeof(buf))
3569                         buf[len] = '\0';
3570                 host = buf;
3571         } else
3572                 host = av;
3573
3574         if (proto == IPPROTO_IPV6  || strcmp(av, "me6") == 0 ||
3575             inet_pton(AF_INET6, host, &a) == 1)
3576                 ret = add_srcip6(cmd, av, cblen, tstate);
3577         /* XXX: should check for IPv4, not !IPv6 */
3578         if (ret == NULL && (proto == IPPROTO_IP || strcmp(av, "me") == 0 ||
3579             inet_pton(AF_INET6, host, &a) != 1))
3580                 ret = add_srcip(cmd, av, cblen, tstate);
3581         if (ret == NULL && strcmp(av, "any") != 0)
3582                 ret = cmd;
3583
3584         return ret;
3585 }
3586
3587 static ipfw_insn *
3588 add_dst(ipfw_insn *cmd, char *av, u_char proto, int cblen, struct tidx *tstate)
3589 {
3590         struct in6_addr a;
3591         char *host, *ch, buf[INET6_ADDRSTRLEN];
3592         ipfw_insn *ret = NULL;
3593         int len;
3594
3595         /* Copy first address in set if needed */
3596         if ((ch = strpbrk(av, "/,")) != NULL) {
3597                 len = ch - av;
3598                 strlcpy(buf, av, sizeof(buf));
3599                 if (len < sizeof(buf))
3600                         buf[len] = '\0';
3601                 host = buf;
3602         } else
3603                 host = av;
3604
3605         if (proto == IPPROTO_IPV6  || strcmp(av, "me6") == 0 ||
3606             inet_pton(AF_INET6, host, &a) == 1)
3607                 ret = add_dstip6(cmd, av, cblen, tstate);
3608         /* XXX: should check for IPv4, not !IPv6 */
3609         if (ret == NULL && (proto == IPPROTO_IP || strcmp(av, "me") == 0 ||
3610             inet_pton(AF_INET6, host, &a) != 1))
3611                 ret = add_dstip(cmd, av, cblen, tstate);
3612         if (ret == NULL && strcmp(av, "any") != 0)
3613                 ret = cmd;
3614
3615         return ret;
3616 }
3617
3618 /*
3619  * Parse arguments and assemble the microinstructions which make up a rule.
3620  * Rules are added into the 'rulebuf' and then copied in the correct order
3621  * into the actual rule.
3622  *
3623  * The syntax for a rule starts with the action, followed by
3624  * optional action parameters, and the various match patterns.
3625  * In the assembled microcode, the first opcode must be an O_PROBE_STATE
3626  * (generated if the rule includes a keep-state option), then the
3627  * various match patterns, log/altq actions, and the actual action.
3628  *
3629  */
3630 void
3631 compile_rule(char *av[], uint32_t *rbuf, int *rbufsize, struct tidx *tstate)
3632 {
3633         /*
3634          * rules are added into the 'rulebuf' and then copied in
3635          * the correct order into the actual rule.
3636          * Some things that need to go out of order (prob, action etc.)
3637          * go into actbuf[].
3638          */
3639         static uint32_t actbuf[255], cmdbuf[255];
3640         int rblen, ablen, cblen;
3641
3642         ipfw_insn *src, *dst, *cmd, *action, *prev=NULL;
3643         ipfw_insn *first_cmd;   /* first match pattern */
3644
3645         struct ip_fw_rule *rule;
3646
3647         /*
3648          * various flags used to record that we entered some fields.
3649          */
3650         ipfw_insn *have_state = NULL;   /* check-state or keep-state */
3651         ipfw_insn *have_log = NULL, *have_altq = NULL, *have_tag = NULL;
3652         size_t len;
3653
3654         int i;
3655
3656         int open_par = 0;       /* open parenthesis ( */
3657
3658         /* proto is here because it is used to fetch ports */
3659         u_char proto = IPPROTO_IP;      /* default protocol */
3660
3661         double match_prob = 1; /* match probability, default is always match */
3662
3663         bzero(actbuf, sizeof(actbuf));          /* actions go here */
3664         bzero(cmdbuf, sizeof(cmdbuf));
3665         bzero(rbuf, *rbufsize);
3666
3667         rule = (struct ip_fw_rule *)rbuf;
3668         cmd = (ipfw_insn *)cmdbuf;
3669         action = (ipfw_insn *)actbuf;
3670
3671         rblen = *rbufsize / sizeof(uint32_t);
3672         rblen -= sizeof(struct ip_fw_rule) / sizeof(uint32_t);
3673         ablen = sizeof(actbuf) / sizeof(actbuf[0]);
3674         cblen = sizeof(cmdbuf) / sizeof(cmdbuf[0]);
3675         cblen -= F_INSN_SIZE(ipfw_insn_u32) + 1;
3676
3677 #define CHECK_RBUFLEN(len)      { CHECK_LENGTH(rblen, len); rblen -= len; }
3678 #define CHECK_ACTLEN            CHECK_LENGTH(ablen, action->len)
3679
3680         av++;
3681
3682         /* [rule N]     -- Rule number optional */
3683         if (av[0] && isdigit(**av)) {
3684                 rule->rulenum = atoi(*av);
3685                 av++;
3686         }
3687
3688         /* [set N]      -- set number (0..RESVD_SET), optional */
3689         if (av[0] && av[1] && _substrcmp(*av, "set") == 0) {
3690                 int set = strtoul(av[1], NULL, 10);
3691                 if (set < 0 || set > RESVD_SET)
3692                         errx(EX_DATAERR, "illegal set %s", av[1]);
3693                 rule->set = set;
3694                 tstate->set = set;
3695                 av += 2;
3696         }
3697
3698         /* [prob D]     -- match probability, optional */
3699         if (av[0] && av[1] && _substrcmp(*av, "prob") == 0) {
3700                 match_prob = strtod(av[1], NULL);
3701
3702                 if (match_prob <= 0 || match_prob > 1)
3703                         errx(EX_DATAERR, "illegal match prob. %s", av[1]);
3704                 av += 2;
3705         }
3706
3707         /* action       -- mandatory */
3708         NEED1("missing action");
3709         i = match_token(rule_actions, *av);
3710         av++;
3711         action->len = 1;        /* default */
3712         CHECK_ACTLEN;
3713         switch(i) {
3714         case TOK_CHECKSTATE:
3715                 have_state = action;
3716                 action->opcode = O_CHECK_STATE;
3717                 if (*av == NULL) {
3718                         action->arg1 = pack_object(tstate,
3719                             default_state_name, IPFW_TLV_STATE_NAME);
3720                         break;
3721                 }
3722                 if (strcmp(*av, "any") == 0)
3723                         action->arg1 = 0;
3724                 else if ((i = match_token(rule_options, *av)) != -1) {
3725                         action->arg1 = pack_object(tstate,
3726                             default_state_name, IPFW_TLV_STATE_NAME);
3727                         if (i != TOK_COMMENT)
3728                                 warn("Ambiguous state name '%s', '%s'"
3729                                     " used instead.\n", *av,
3730                                     default_state_name);
3731                         break;
3732                 } else if (state_check_name(*av) == 0)
3733                         action->arg1 = pack_object(tstate, *av,
3734                             IPFW_TLV_STATE_NAME);
3735                 else
3736                         errx(EX_DATAERR, "Invalid state name %s", *av);
3737                 av++;
3738                 break;
3739
3740         case TOK_ACCEPT:
3741                 action->opcode = O_ACCEPT;
3742                 break;
3743
3744         case TOK_DENY:
3745                 action->opcode = O_DENY;
3746                 action->arg1 = 0;
3747                 break;
3748
3749         case TOK_REJECT:
3750                 action->opcode = O_REJECT;
3751                 action->arg1 = ICMP_UNREACH_HOST;
3752                 break;
3753
3754         case TOK_RESET:
3755                 action->opcode = O_REJECT;
3756                 action->arg1 = ICMP_REJECT_RST;
3757                 break;
3758
3759         case TOK_RESET6:
3760                 action->opcode = O_UNREACH6;
3761                 action->arg1 = ICMP6_UNREACH_RST;
3762                 break;
3763
3764         case TOK_UNREACH:
3765                 action->opcode = O_REJECT;
3766                 NEED1("missing reject code");
3767                 fill_reject_code(&action->arg1, *av);
3768                 av++;
3769                 break;
3770
3771         case TOK_UNREACH6:
3772                 action->opcode = O_UNREACH6;
3773                 NEED1("missing unreach code");
3774                 fill_unreach6_code(&action->arg1, *av);
3775                 av++;
3776                 break;
3777
3778         case TOK_COUNT:
3779                 action->opcode = O_COUNT;
3780                 break;
3781
3782         case TOK_NAT:
3783                 action->opcode = O_NAT;
3784                 action->len = F_INSN_SIZE(ipfw_insn_nat);
3785                 CHECK_ACTLEN;
3786                 if (*av != NULL && _substrcmp(*av, "global") == 0) {
3787                         action->arg1 = IP_FW_NAT44_GLOBAL;
3788                         av++;
3789                         break;
3790                 } else
3791                         goto chkarg;
3792         case TOK_QUEUE:
3793                 action->opcode = O_QUEUE;
3794                 goto chkarg;
3795         case TOK_PIPE:
3796                 action->opcode = O_PIPE;
3797                 goto chkarg;
3798         case TOK_SKIPTO:
3799                 action->opcode = O_SKIPTO;
3800                 goto chkarg;
3801         case TOK_NETGRAPH:
3802                 action->opcode = O_NETGRAPH;
3803                 goto chkarg;
3804         case TOK_NGTEE:
3805                 action->opcode = O_NGTEE;
3806                 goto chkarg;
3807         case TOK_DIVERT:
3808                 action->opcode = O_DIVERT;
3809                 goto chkarg;
3810         case TOK_TEE:
3811                 action->opcode = O_TEE;
3812                 goto chkarg;
3813         case TOK_CALL:
3814                 action->opcode = O_CALLRETURN;
3815 chkarg:
3816                 if (!av[0])
3817                         errx(EX_USAGE, "missing argument for %s", *(av - 1));
3818                 if (isdigit(**av)) {
3819                         action->arg1 = strtoul(*av, NULL, 10);
3820                         if (action->arg1 <= 0 || action->arg1 >= IP_FW_TABLEARG)
3821                                 errx(EX_DATAERR, "illegal argument for %s",
3822                                     *(av - 1));
3823                 } else if (_substrcmp(*av, "tablearg") == 0) {
3824                         action->arg1 = IP_FW_TARG;
3825                 } else if (i == TOK_DIVERT || i == TOK_TEE) {
3826                         struct servent *s;
3827                         setservent(1);
3828                         s = getservbyname(av[0], "divert");
3829                         if (s != NULL)
3830                                 action->arg1 = ntohs(s->s_port);
3831                         else
3832                                 errx(EX_DATAERR, "illegal divert/tee port");
3833                 } else
3834                         errx(EX_DATAERR, "illegal argument for %s", *(av - 1));
3835                 av++;
3836                 break;
3837
3838         case TOK_FORWARD: {
3839                 /*
3840                  * Locate the address-port separator (':' or ',').
3841                  * Could be one of the following:
3842                  *      hostname:port
3843                  *      IPv4 a.b.c.d,port
3844                  *      IPv4 a.b.c.d:port
3845                  *      IPv6 w:x:y::z,port
3846                  * The ':' can only be used with hostname and IPv4 address.
3847                  * XXX-BZ Should we also support [w:x:y::z]:port?
3848                  */
3849                 struct sockaddr_storage result;
3850                 struct addrinfo *res;
3851                 char *s, *end;
3852                 int family;
3853                 u_short port_number;
3854
3855                 NEED1("missing forward address[:port]");
3856
3857                 /*
3858                  * locate the address-port separator (':' or ',')
3859                  */
3860                 s = strchr(*av, ',');
3861                 if (s == NULL) {
3862                         /* Distinguish between IPv4:port and IPv6 cases. */
3863                         s = strchr(*av, ':');
3864                         if (s && strchr(s+1, ':'))
3865                                 s = NULL; /* no port */
3866                 }
3867
3868                 port_number = 0;
3869                 if (s != NULL) {
3870                         /* Terminate host portion and set s to start of port. */
3871                         *(s++) = '\0';
3872                         i = strtoport(s, &end, 0 /* base */, 0 /* proto */);
3873                         if (s == end)
3874                                 errx(EX_DATAERR,
3875                                     "illegal forwarding port ``%s''", s);
3876                         port_number = (u_short)i;
3877                 }
3878
3879                 if (_substrcmp(*av, "tablearg") == 0) {
3880                         family = PF_INET;
3881                         ((struct sockaddr_in*)&result)->sin_addr.s_addr =
3882                             INADDR_ANY;
3883                 } else {
3884                         /*
3885                          * Resolve the host name or address to a family and a
3886                          * network representation of the address.
3887                          */
3888                         if (getaddrinfo(*av, NULL, NULL, &res))
3889                                 errx(EX_DATAERR, NULL);
3890                         /* Just use the first host in the answer. */
3891                         family = res->ai_family;
3892                         memcpy(&result, res->ai_addr, res->ai_addrlen);
3893                         freeaddrinfo(res);
3894                 }
3895
3896                 if (family == PF_INET) {
3897                         ipfw_insn_sa *p = (ipfw_insn_sa *)action;
3898
3899                         action->opcode = O_FORWARD_IP;
3900                         action->len = F_INSN_SIZE(ipfw_insn_sa);
3901                         CHECK_ACTLEN;
3902
3903                         /*
3904                          * In the kernel we assume AF_INET and use only
3905                          * sin_port and sin_addr. Remember to set sin_len as
3906                          * the routing code seems to use it too.
3907                          */
3908                         p->sa.sin_len = sizeof(struct sockaddr_in);
3909                         p->sa.sin_family = AF_INET;
3910                         p->sa.sin_port = port_number;
3911                         p->sa.sin_addr.s_addr =
3912                              ((struct sockaddr_in *)&result)->sin_addr.s_addr;
3913                 } else if (family == PF_INET6) {
3914                         ipfw_insn_sa6 *p = (ipfw_insn_sa6 *)action;
3915
3916                         action->opcode = O_FORWARD_IP6;
3917                         action->len = F_INSN_SIZE(ipfw_insn_sa6);
3918                         CHECK_ACTLEN;
3919
3920                         p->sa.sin6_len = sizeof(struct sockaddr_in6);
3921                         p->sa.sin6_family = AF_INET6;
3922                         p->sa.sin6_port = port_number;
3923                         p->sa.sin6_flowinfo = 0;
3924                         p->sa.sin6_scope_id =
3925                             ((struct sockaddr_in6 *)&result)->sin6_scope_id;
3926                         bcopy(&((struct sockaddr_in6*)&result)->sin6_addr,
3927                             &p->sa.sin6_addr, sizeof(p->sa.sin6_addr));
3928                 } else {
3929                         errx(EX_DATAERR, "Invalid address family in forward action");
3930                 }
3931                 av++;
3932                 break;
3933             }
3934         case TOK_COMMENT:
3935                 /* pretend it is a 'count' rule followed by the comment */
3936                 action->opcode = O_COUNT;
3937                 av--;           /* go back... */
3938                 break;
3939
3940         case TOK_SETFIB:
3941             {
3942                 int numfibs;
3943                 size_t intsize = sizeof(int);
3944
3945                 action->opcode = O_SETFIB;
3946                 NEED1("missing fib number");
3947                 if (_substrcmp(*av, "tablearg") == 0) {
3948                         action->arg1 = IP_FW_TARG;
3949                 } else {
3950                         action->arg1 = strtoul(*av, NULL, 10);
3951                         if (sysctlbyname("net.fibs", &numfibs, &intsize,
3952                             NULL, 0) == -1)
3953                                 errx(EX_DATAERR, "fibs not suported.\n");
3954                         if (action->arg1 >= numfibs)  /* Temporary */
3955                                 errx(EX_DATAERR, "fib too large.\n");
3956                         /* Add high-order bit to fib to make room for tablearg*/
3957                         action->arg1 |= 0x8000;
3958                 }
3959                 av++;
3960                 break;
3961             }
3962
3963         case TOK_SETDSCP:
3964             {
3965                 int code;
3966
3967                 action->opcode = O_SETDSCP;
3968                 NEED1("missing DSCP code");
3969                 if (_substrcmp(*av, "tablearg") == 0) {
3970                         action->arg1 = IP_FW_TARG;
3971                 } else {
3972                         if (isalpha(*av[0])) {
3973                                 if ((code = match_token(f_ipdscp, *av)) == -1)
3974                                         errx(EX_DATAERR, "Unknown DSCP code");
3975                                 action->arg1 = code;
3976                         } else
3977                                 action->arg1 = strtoul(*av, NULL, 10);
3978                         /*
3979                          * Add high-order bit to DSCP to make room
3980                          * for tablearg
3981                          */
3982                         action->arg1 |= 0x8000;
3983                 }
3984                 av++;
3985                 break;
3986             }
3987
3988         case TOK_REASS:
3989                 action->opcode = O_REASS;
3990                 break;
3991
3992         case TOK_RETURN:
3993                 fill_cmd(action, O_CALLRETURN, F_NOT, 0);
3994                 break;
3995
3996         default:
3997                 av--;
3998                 if (match_token(rule_eactions, *av) == -1)
3999                         errx(EX_DATAERR, "invalid action %s\n", *av);
4000                 /*
4001                  * External actions support.
4002                  * XXX: we support only syntax with instance name.
4003                  *      For known external actions (from rule_eactions list)
4004                  *      we can handle syntax directly. But with `eaction'
4005                  *      keyword we can use only `eaction <name> <instance>'
4006                  *      syntax.
4007                  */
4008         case TOK_EACTION: {
4009                 uint16_t idx;
4010
4011                 NEED1("Missing eaction name");
4012                 if (eaction_check_name(*av) != 0)
4013                         errx(EX_DATAERR, "Invalid eaction name %s", *av);
4014                 idx = pack_object(tstate, *av, IPFW_TLV_EACTION);
4015                 if (idx == 0)
4016                         errx(EX_DATAERR, "pack_object failed");
4017                 fill_cmd(action, O_EXTERNAL_ACTION, 0, idx);
4018                 av++;
4019                 NEED1("Missing eaction instance name");
4020                 action = next_cmd(action, &ablen);
4021                 action->len = 1;
4022                 CHECK_ACTLEN;
4023                 if (eaction_check_name(*av) != 0)
4024                         errx(EX_DATAERR, "Invalid eaction instance name %s",
4025                             *av);
4026                 /*
4027                  * External action instance object has TLV type depended
4028                  * from the external action name object index. Since we
4029                  * currently don't know this index, use zero as TLV type.
4030                  */
4031                 idx = pack_object(tstate, *av, 0);
4032                 if (idx == 0)
4033                         errx(EX_DATAERR, "pack_object failed");
4034                 fill_cmd(action, O_EXTERNAL_INSTANCE, 0, idx);
4035                 av++;
4036                 }
4037         }
4038         action = next_cmd(action, &ablen);
4039
4040         /*
4041          * [altq queuename] -- altq tag, optional
4042          * [log [logamount N]]  -- log, optional
4043          *
4044          * If they exist, it go first in the cmdbuf, but then it is
4045          * skipped in the copy section to the end of the buffer.
4046          */
4047         while (av[0] != NULL && (i = match_token(rule_action_params, *av)) != -1) {
4048                 av++;
4049                 switch (i) {
4050                 case TOK_LOG:
4051                     {
4052                         ipfw_insn_log *c = (ipfw_insn_log *)cmd;
4053                         int l;
4054
4055                         if (have_log)
4056                                 errx(EX_DATAERR,
4057                                     "log cannot be specified more than once");
4058                         have_log = (ipfw_insn *)c;
4059                         cmd->len = F_INSN_SIZE(ipfw_insn_log);
4060                         CHECK_CMDLEN;
4061                         cmd->opcode = O_LOG;
4062                         if (av[0] && _substrcmp(*av, "logamount") == 0) {
4063                                 av++;
4064                                 NEED1("logamount requires argument");
4065                                 l = atoi(*av);
4066                                 if (l < 0)
4067                                         errx(EX_DATAERR,
4068                                             "logamount must be positive");
4069                                 c->max_log = l;
4070                                 av++;
4071                         } else {
4072                                 len = sizeof(c->max_log);
4073                                 if (sysctlbyname("net.inet.ip.fw.verbose_limit",
4074                                     &c->max_log, &len, NULL, 0) == -1) {
4075                                         if (co.test_only) {
4076                                                 c->max_log = 0;
4077                                                 break;
4078                                         }
4079                                         errx(1, "sysctlbyname(\"%s\")",
4080                                             "net.inet.ip.fw.verbose_limit");
4081                                 }
4082                         }
4083                     }
4084                         break;
4085
4086 #ifndef NO_ALTQ
4087                 case TOK_ALTQ:
4088                     {
4089                         ipfw_insn_altq *a = (ipfw_insn_altq *)cmd;
4090
4091                         NEED1("missing altq queue name");
4092                         if (have_altq)
4093                                 errx(EX_DATAERR,
4094                                     "altq cannot be specified more than once");
4095                         have_altq = (ipfw_insn *)a;
4096                         cmd->len = F_INSN_SIZE(ipfw_insn_altq);
4097                         CHECK_CMDLEN;
4098                         cmd->opcode = O_ALTQ;
4099                         a->qid = altq_name_to_qid(*av);
4100                         av++;
4101                     }
4102                         break;
4103 #endif
4104
4105                 case TOK_TAG:
4106                 case TOK_UNTAG: {
4107                         uint16_t tag;
4108
4109                         if (have_tag)
4110                                 errx(EX_USAGE, "tag and untag cannot be "
4111                                     "specified more than once");
4112                         GET_UINT_ARG(tag, IPFW_ARG_MIN, IPFW_ARG_MAX, i,
4113                            rule_action_params);
4114                         have_tag = cmd;
4115                         fill_cmd(cmd, O_TAG, (i == TOK_TAG) ? 0: F_NOT, tag);
4116                         av++;
4117                         break;
4118                 }
4119
4120                 default:
4121                         abort();
4122                 }
4123                 cmd = next_cmd(cmd, &cblen);
4124         }
4125
4126         if (have_state) { /* must be a check-state, we are done */
4127                 if (*av != NULL &&
4128                     match_token(rule_options, *av) == TOK_COMMENT) {
4129                         /* check-state has a comment */
4130                         av++;
4131                         fill_comment(cmd, av, cblen);
4132                         cmd = next_cmd(cmd, &cblen);
4133                         av[0] = NULL;
4134                 }
4135                 goto done;
4136         }
4137
4138 #define OR_START(target)                                        \
4139         if (av[0] && (*av[0] == '(' || *av[0] == '{')) {        \
4140                 if (open_par)                                   \
4141                         errx(EX_USAGE, "nested \"(\" not allowed\n"); \
4142                 prev = NULL;                                    \
4143                 open_par = 1;                                   \
4144                 if ( (av[0])[1] == '\0') {                      \
4145                         av++;                                   \
4146                 } else                                          \
4147                         (*av)++;                                \
4148         }                                                       \
4149         target:                                                 \
4150
4151
4152 #define CLOSE_PAR                                               \
4153         if (open_par) {                                         \
4154                 if (av[0] && (                                  \
4155                     strcmp(*av, ")") == 0 ||                    \
4156                     strcmp(*av, "}") == 0)) {                   \
4157                         prev = NULL;                            \
4158                         open_par = 0;                           \
4159                         av++;                                   \
4160                 } else                                          \
4161                         errx(EX_USAGE, "missing \")\"\n");      \
4162         }
4163
4164 #define NOT_BLOCK                                               \
4165         if (av[0] && _substrcmp(*av, "not") == 0) {             \
4166                 if (cmd->len & F_NOT)                           \
4167                         errx(EX_USAGE, "double \"not\" not allowed\n"); \
4168                 cmd->len |= F_NOT;                              \
4169                 av++;                                           \
4170         }
4171
4172 #define OR_BLOCK(target)                                        \
4173         if (av[0] && _substrcmp(*av, "or") == 0) {              \
4174                 if (prev == NULL || open_par == 0)              \
4175                         errx(EX_DATAERR, "invalid OR block");   \
4176                 prev->len |= F_OR;                              \
4177                 av++;                                   \
4178                 goto target;                                    \
4179         }                                                       \
4180         CLOSE_PAR;
4181
4182         first_cmd = cmd;
4183
4184 #if 0
4185         /*
4186          * MAC addresses, optional.
4187          * If we have this, we skip the part "proto from src to dst"
4188          * and jump straight to the option parsing.
4189          */
4190         NOT_BLOCK;
4191         NEED1("missing protocol");
4192         if (_substrcmp(*av, "MAC") == 0 ||
4193             _substrcmp(*av, "mac") == 0) {
4194                 av++;                   /* the "MAC" keyword */
4195                 add_mac(cmd, av);       /* exits in case of errors */
4196                 cmd = next_cmd(cmd);
4197                 av += 2;                /* dst-mac and src-mac */
4198                 NOT_BLOCK;
4199                 NEED1("missing mac type");
4200                 if (add_mactype(cmd, av[0]))
4201                         cmd = next_cmd(cmd);
4202                 av++;                   /* any or mac-type */
4203                 goto read_options;
4204         }
4205 #endif
4206
4207         /*
4208          * protocol, mandatory
4209          */
4210     OR_START(get_proto);
4211         NOT_BLOCK;
4212         NEED1("missing protocol");
4213         if (add_proto_compat(cmd, *av, &proto)) {
4214                 av++;
4215                 if (F_LEN(cmd) != 0) {
4216                         prev = cmd;
4217                         cmd = next_cmd(cmd, &cblen);
4218                 }
4219         } else if (first_cmd != cmd) {
4220                 errx(EX_DATAERR, "invalid protocol ``%s''", *av);
4221         } else
4222                 goto read_options;
4223     OR_BLOCK(get_proto);
4224
4225         /*
4226          * "from", mandatory
4227          */
4228         if ((av[0] == NULL) || _substrcmp(*av, "from") != 0)
4229                 errx(EX_USAGE, "missing ``from''");
4230         av++;
4231
4232         /*
4233          * source IP, mandatory
4234          */
4235     OR_START(source_ip);
4236         NOT_BLOCK;      /* optional "not" */
4237         NEED1("missing source address");
4238         if (add_src(cmd, *av, proto, cblen, tstate)) {
4239                 av++;
4240                 if (F_LEN(cmd) != 0) {  /* ! any */
4241                         prev = cmd;
4242                         cmd = next_cmd(cmd, &cblen);
4243                 }
4244         } else
4245                 errx(EX_USAGE, "bad source address %s", *av);
4246     OR_BLOCK(source_ip);
4247
4248         /*
4249          * source ports, optional
4250          */
4251         NOT_BLOCK;      /* optional "not" */
4252         if ( av[0] != NULL ) {
4253                 if (_substrcmp(*av, "any") == 0 ||
4254                     add_ports(cmd, *av, proto, O_IP_SRCPORT, cblen)) {
4255                         av++;
4256                         if (F_LEN(cmd) != 0)
4257                                 cmd = next_cmd(cmd, &cblen);
4258                 }
4259         }
4260
4261         /*
4262          * "to", mandatory
4263          */
4264         if ( (av[0] == NULL) || _substrcmp(*av, "to") != 0 )
4265                 errx(EX_USAGE, "missing ``to''");
4266         av++;
4267
4268         /*
4269          * destination, mandatory
4270          */
4271     OR_START(dest_ip);
4272         NOT_BLOCK;      /* optional "not" */
4273         NEED1("missing dst address");
4274         if (add_dst(cmd, *av, proto, cblen, tstate)) {
4275                 av++;
4276                 if (F_LEN(cmd) != 0) {  /* ! any */
4277                         prev = cmd;
4278                         cmd = next_cmd(cmd, &cblen);
4279                 }
4280         } else
4281                 errx( EX_USAGE, "bad destination address %s", *av);
4282     OR_BLOCK(dest_ip);
4283
4284         /*
4285          * dest. ports, optional
4286          */
4287         NOT_BLOCK;      /* optional "not" */
4288         if (av[0]) {
4289                 if (_substrcmp(*av, "any") == 0 ||
4290                     add_ports(cmd, *av, proto, O_IP_DSTPORT, cblen)) {
4291                         av++;
4292                         if (F_LEN(cmd) != 0)
4293                                 cmd = next_cmd(cmd, &cblen);
4294                 }
4295         }
4296
4297 read_options:
4298         if (av[0] && first_cmd == cmd) {
4299                 /*
4300                  * nothing specified so far, store in the rule to ease
4301                  * printout later.
4302                  */
4303                  rule->flags |= IPFW_RULE_NOOPT;
4304         }
4305         prev = NULL;
4306         while ( av[0] != NULL ) {
4307                 char *s;
4308                 ipfw_insn_u32 *cmd32;   /* alias for cmd */
4309
4310                 s = *av;
4311                 cmd32 = (ipfw_insn_u32 *)cmd;
4312
4313                 if (*s == '!') {        /* alternate syntax for NOT */
4314                         if (cmd->len & F_NOT)
4315                                 errx(EX_USAGE, "double \"not\" not allowed\n");
4316                         cmd->len = F_NOT;
4317                         s++;
4318                 }
4319                 i = match_token(rule_options, s);
4320                 av++;
4321                 switch(i) {
4322                 case TOK_NOT:
4323                         if (cmd->len & F_NOT)
4324                                 errx(EX_USAGE, "double \"not\" not allowed\n");
4325                         cmd->len = F_NOT;
4326                         break;
4327
4328                 case TOK_OR:
4329                         if (open_par == 0 || prev == NULL)
4330                                 errx(EX_USAGE, "invalid \"or\" block\n");
4331                         prev->len |= F_OR;
4332                         break;
4333
4334                 case TOK_STARTBRACE:
4335                         if (open_par)
4336                                 errx(EX_USAGE, "+nested \"(\" not allowed\n");
4337                         open_par = 1;
4338                         break;
4339
4340                 case TOK_ENDBRACE:
4341                         if (!open_par)
4342                                 errx(EX_USAGE, "+missing \")\"\n");
4343                         open_par = 0;
4344                         prev = NULL;
4345                         break;
4346
4347                 case TOK_IN:
4348                         fill_cmd(cmd, O_IN, 0, 0);
4349                         break;
4350
4351                 case TOK_OUT:
4352                         cmd->len ^= F_NOT; /* toggle F_NOT */
4353                         fill_cmd(cmd, O_IN, 0, 0);
4354                         break;
4355
4356                 case TOK_DIVERTED:
4357                         fill_cmd(cmd, O_DIVERTED, 0, 3);
4358                         break;
4359
4360                 case TOK_DIVERTEDLOOPBACK:
4361                         fill_cmd(cmd, O_DIVERTED, 0, 1);
4362                         break;
4363
4364                 case TOK_DIVERTEDOUTPUT:
4365                         fill_cmd(cmd, O_DIVERTED, 0, 2);
4366                         break;
4367
4368                 case TOK_FRAG:
4369                         fill_cmd(cmd, O_FRAG, 0, 0);
4370                         break;
4371
4372                 case TOK_LAYER2:
4373                         fill_cmd(cmd, O_LAYER2, 0, 0);
4374                         break;
4375
4376                 case TOK_XMIT:
4377                 case TOK_RECV:
4378                 case TOK_VIA:
4379                         NEED1("recv, xmit, via require interface name"
4380                                 " or address");
4381                         fill_iface((ipfw_insn_if *)cmd, av[0], cblen, tstate);
4382                         av++;
4383                         if (F_LEN(cmd) == 0)    /* not a valid address */
4384                                 break;
4385                         if (i == TOK_XMIT)
4386                                 cmd->opcode = O_XMIT;
4387                         else if (i == TOK_RECV)
4388                                 cmd->opcode = O_RECV;
4389                         else if (i == TOK_VIA)
4390                                 cmd->opcode = O_VIA;
4391                         break;
4392
4393                 case TOK_ICMPTYPES:
4394                         NEED1("icmptypes requires list of types");
4395                         fill_icmptypes((ipfw_insn_u32 *)cmd, *av);
4396                         av++;
4397                         break;
4398
4399                 case TOK_ICMP6TYPES:
4400                         NEED1("icmptypes requires list of types");
4401                         fill_icmp6types((ipfw_insn_icmp6 *)cmd, *av, cblen);
4402                         av++;
4403                         break;
4404
4405                 case TOK_IPTTL:
4406                         NEED1("ipttl requires TTL");
4407                         if (strpbrk(*av, "-,")) {
4408                             if (!add_ports(cmd, *av, 0, O_IPTTL, cblen))
4409                                 errx(EX_DATAERR, "invalid ipttl %s", *av);
4410                         } else
4411                             fill_cmd(cmd, O_IPTTL, 0, strtoul(*av, NULL, 0));
4412                         av++;
4413                         break;
4414
4415                 case TOK_IPID:
4416                         NEED1("ipid requires id");
4417                         if (strpbrk(*av, "-,")) {
4418                             if (!add_ports(cmd, *av, 0, O_IPID, cblen))
4419                                 errx(EX_DATAERR, "invalid ipid %s", *av);
4420                         } else
4421                             fill_cmd(cmd, O_IPID, 0, strtoul(*av, NULL, 0));
4422                         av++;
4423                         break;
4424
4425                 case TOK_IPLEN:
4426                         NEED1("iplen requires length");
4427                         if (strpbrk(*av, "-,")) {
4428                             if (!add_ports(cmd, *av, 0, O_IPLEN, cblen))
4429                                 errx(EX_DATAERR, "invalid ip len %s", *av);
4430                         } else
4431                             fill_cmd(cmd, O_IPLEN, 0, strtoul(*av, NULL, 0));
4432                         av++;
4433                         break;
4434
4435                 case TOK_IPVER:
4436                         NEED1("ipver requires version");
4437                         fill_cmd(cmd, O_IPVER, 0, strtoul(*av, NULL, 0));
4438                         av++;
4439                         break;
4440
4441                 case TOK_IPPRECEDENCE:
4442                         NEED1("ipprecedence requires value");
4443                         fill_cmd(cmd, O_IPPRECEDENCE, 0,
4444                             (strtoul(*av, NULL, 0) & 7) << 5);
4445                         av++;
4446                         break;
4447
4448                 case TOK_DSCP:
4449                         NEED1("missing DSCP code");
4450                         fill_dscp(cmd, *av, cblen);
4451                         av++;
4452                         break;
4453
4454                 case TOK_IPOPTS:
4455                         NEED1("missing argument for ipoptions");
4456                         fill_flags_cmd(cmd, O_IPOPT, f_ipopts, *av);
4457                         av++;
4458                         break;
4459
4460                 case TOK_IPTOS:
4461                         NEED1("missing argument for iptos");
4462                         fill_flags_cmd(cmd, O_IPTOS, f_iptos, *av);
4463                         av++;
4464                         break;
4465
4466                 case TOK_UID:
4467                         NEED1("uid requires argument");
4468                     {
4469                         char *end;
4470                         uid_t uid;
4471                         struct passwd *pwd;
4472
4473                         cmd->opcode = O_UID;
4474                         uid = strtoul(*av, &end, 0);
4475                         pwd = (*end == '\0') ? getpwuid(uid) : getpwnam(*av);
4476                         if (pwd == NULL)
4477                                 errx(EX_DATAERR, "uid \"%s\" nonexistent", *av);
4478                         cmd32->d[0] = pwd->pw_uid;
4479                         cmd->len |= F_INSN_SIZE(ipfw_insn_u32);
4480                         av++;
4481                     }
4482                         break;
4483
4484                 case TOK_GID:
4485                         NEED1("gid requires argument");
4486                     {
4487                         char *end;
4488                         gid_t gid;
4489                         struct group *grp;
4490
4491                         cmd->opcode = O_GID;
4492                         gid = strtoul(*av, &end, 0);
4493                         grp = (*end == '\0') ? getgrgid(gid) : getgrnam(*av);
4494                         if (grp == NULL)
4495                                 errx(EX_DATAERR, "gid \"%s\" nonexistent", *av);
4496                         cmd32->d[0] = grp->gr_gid;
4497                         cmd->len |= F_INSN_SIZE(ipfw_insn_u32);
4498                         av++;
4499                     }
4500                         break;
4501
4502                 case TOK_JAIL:
4503                         NEED1("jail requires argument");
4504                     {
4505                         char *end;
4506                         int jid;
4507
4508                         cmd->opcode = O_JAIL;
4509                         jid = (int)strtol(*av, &end, 0);
4510                         if (jid < 0 || *end != '\0')
4511                                 errx(EX_DATAERR, "jail requires prison ID");
4512                         cmd32->d[0] = (uint32_t)jid;
4513                         cmd->len |= F_INSN_SIZE(ipfw_insn_u32);
4514                         av++;
4515                     }
4516                         break;
4517
4518                 case TOK_ESTAB:
4519                         fill_cmd(cmd, O_ESTAB, 0, 0);
4520                         break;
4521
4522                 case TOK_SETUP:
4523                         fill_cmd(cmd, O_TCPFLAGS, 0,
4524                                 (TH_SYN) | ( (TH_ACK) & 0xff) <<8 );
4525                         break;
4526
4527                 case TOK_TCPDATALEN:
4528                         NEED1("tcpdatalen requires length");
4529                         if (strpbrk(*av, "-,")) {
4530                             if (!add_ports(cmd, *av, 0, O_TCPDATALEN, cblen))
4531                                 errx(EX_DATAERR, "invalid tcpdata len %s", *av);
4532                         } else
4533                             fill_cmd(cmd, O_TCPDATALEN, 0,
4534                                     strtoul(*av, NULL, 0));
4535                         av++;
4536                         break;
4537
4538                 case TOK_TCPOPTS:
4539                         NEED1("missing argument for tcpoptions");
4540                         fill_flags_cmd(cmd, O_TCPOPTS, f_tcpopts, *av);
4541                         av++;
4542                         break;
4543
4544                 case TOK_TCPSEQ:
4545                 case TOK_TCPACK:
4546                         NEED1("tcpseq/tcpack requires argument");
4547                         cmd->len = F_INSN_SIZE(ipfw_insn_u32);
4548                         cmd->opcode = (i == TOK_TCPSEQ) ? O_TCPSEQ : O_TCPACK;
4549                         cmd32->d[0] = htonl(strtoul(*av, NULL, 0));
4550                         av++;
4551                         break;
4552
4553                 case TOK_TCPWIN:
4554                         NEED1("tcpwin requires length");
4555                         if (strpbrk(*av, "-,")) {
4556                             if (!add_ports(cmd, *av, 0, O_TCPWIN, cblen))
4557                                 errx(EX_DATAERR, "invalid tcpwin len %s", *av);
4558                         } else
4559                             fill_cmd(cmd, O_TCPWIN, 0,
4560                                     strtoul(*av, NULL, 0));
4561                         av++;
4562                         break;
4563
4564                 case TOK_TCPFLAGS:
4565                         NEED1("missing argument for tcpflags");
4566                         cmd->opcode = O_TCPFLAGS;
4567                         fill_flags_cmd(cmd, O_TCPFLAGS, f_tcpflags, *av);
4568                         av++;
4569                         break;
4570
4571                 case TOK_KEEPSTATE: {
4572                         uint16_t uidx;
4573
4574                         if (open_par)
4575                                 errx(EX_USAGE, "keep-state cannot be part "
4576                                     "of an or block");
4577                         if (have_state)
4578                                 errx(EX_USAGE, "only one of keep-state "
4579                                         "and limit is allowed");
4580                         if (*av == NULL ||
4581                             (i = match_token(rule_options, *av)) != -1) {
4582                                 if (*av != NULL && i != TOK_COMMENT)
4583                                         warn("Ambiguous state name '%s',"
4584                                             " '%s' used instead.\n", *av,
4585                                             default_state_name);
4586                                 uidx = pack_object(tstate, default_state_name,
4587                                     IPFW_TLV_STATE_NAME);
4588                         } else {
4589                                 if (state_check_name(*av) != 0)
4590                                         errx(EX_DATAERR,
4591                                             "Invalid state name %s", *av);
4592                                 uidx = pack_object(tstate, *av,
4593                                     IPFW_TLV_STATE_NAME);
4594                                 av++;
4595                         }
4596                         have_state = cmd;
4597                         fill_cmd(cmd, O_KEEP_STATE, 0, uidx);
4598                         break;
4599                 }
4600
4601                 case TOK_LIMIT: {
4602                         ipfw_insn_limit *c = (ipfw_insn_limit *)cmd;
4603                         int val;
4604
4605                         if (open_par)
4606                                 errx(EX_USAGE,
4607                                     "limit cannot be part of an or block");
4608                         if (have_state)
4609                                 errx(EX_USAGE, "only one of keep-state and "
4610                                     "limit is allowed");
4611                         have_state = cmd;
4612
4613                         cmd->len = F_INSN_SIZE(ipfw_insn_limit);
4614                         CHECK_CMDLEN;
4615                         cmd->opcode = O_LIMIT;
4616                         c->limit_mask = c->conn_limit = 0;
4617
4618                         while ( av[0] != NULL ) {
4619                                 if ((val = match_token(limit_masks, *av)) <= 0)
4620                                         break;
4621                                 c->limit_mask |= val;
4622                                 av++;
4623                         }
4624
4625                         if (c->limit_mask == 0)
4626                                 errx(EX_USAGE, "limit: missing limit mask");
4627
4628                         GET_UINT_ARG(c->conn_limit, IPFW_ARG_MIN, IPFW_ARG_MAX,
4629                             TOK_LIMIT, rule_options);
4630                         av++;
4631
4632                         if (*av == NULL ||
4633                             (i = match_token(rule_options, *av)) != -1) {
4634                                 if (*av != NULL && i != TOK_COMMENT)
4635                                         warn("Ambiguous state name '%s',"
4636                                             " '%s' used instead.\n", *av,
4637                                             default_state_name);
4638                                 cmd->arg1 = pack_object(tstate,
4639                                     default_state_name, IPFW_TLV_STATE_NAME);
4640                         } else {
4641                                 if (state_check_name(*av) != 0)
4642                                         errx(EX_DATAERR,
4643                                             "Invalid state name %s", *av);
4644                                 cmd->arg1 = pack_object(tstate, *av,
4645                                     IPFW_TLV_STATE_NAME);
4646                                 av++;
4647                         }
4648                         break;
4649                 }
4650
4651                 case TOK_PROTO:
4652                         NEED1("missing protocol");
4653                         if (add_proto(cmd, *av, &proto)) {
4654                                 av++;
4655                         } else
4656                                 errx(EX_DATAERR, "invalid protocol ``%s''",
4657                                     *av);
4658                         break;
4659
4660                 case TOK_SRCIP:
4661                         NEED1("missing source IP");
4662                         if (add_srcip(cmd, *av, cblen, tstate)) {
4663                                 av++;
4664                         }
4665                         break;
4666
4667                 case TOK_DSTIP:
4668                         NEED1("missing destination IP");
4669                         if (add_dstip(cmd, *av, cblen, tstate)) {
4670                                 av++;
4671                         }
4672                         break;
4673
4674                 case TOK_SRCIP6:
4675                         NEED1("missing source IP6");
4676                         if (add_srcip6(cmd, *av, cblen, tstate)) {
4677                                 av++;
4678                         }
4679                         break;
4680
4681                 case TOK_DSTIP6:
4682                         NEED1("missing destination IP6");
4683                         if (add_dstip6(cmd, *av, cblen, tstate)) {
4684                                 av++;
4685                         }
4686                         break;
4687
4688                 case TOK_SRCPORT:
4689                         NEED1("missing source port");
4690                         if (_substrcmp(*av, "any") == 0 ||
4691                             add_ports(cmd, *av, proto, O_IP_SRCPORT, cblen)) {
4692                                 av++;
4693                         } else
4694                                 errx(EX_DATAERR, "invalid source port %s", *av);
4695                         break;
4696
4697                 case TOK_DSTPORT:
4698                         NEED1("missing destination port");
4699                         if (_substrcmp(*av, "any") == 0 ||
4700                             add_ports(cmd, *av, proto, O_IP_DSTPORT, cblen)) {
4701                                 av++;
4702                         } else
4703                                 errx(EX_DATAERR, "invalid destination port %s",
4704                                     *av);
4705                         break;
4706
4707                 case TOK_MAC:
4708                         if (add_mac(cmd, av, cblen))
4709                                 av += 2;
4710                         break;
4711
4712                 case TOK_MACTYPE:
4713                         NEED1("missing mac type");
4714                         if (!add_mactype(cmd, *av, cblen))
4715                                 errx(EX_DATAERR, "invalid mac type %s", *av);
4716                         av++;
4717                         break;
4718
4719                 case TOK_VERREVPATH:
4720                         fill_cmd(cmd, O_VERREVPATH, 0, 0);
4721                         break;
4722
4723                 case TOK_VERSRCREACH:
4724                         fill_cmd(cmd, O_VERSRCREACH, 0, 0);
4725                         break;
4726
4727                 case TOK_ANTISPOOF:
4728                         fill_cmd(cmd, O_ANTISPOOF, 0, 0);
4729                         break;
4730
4731                 case TOK_IPSEC:
4732                         fill_cmd(cmd, O_IPSEC, 0, 0);
4733                         break;
4734
4735                 case TOK_IPV6:
4736                         fill_cmd(cmd, O_IP6, 0, 0);
4737                         break;
4738
4739                 case TOK_IPV4:
4740                         fill_cmd(cmd, O_IP4, 0, 0);
4741                         break;
4742
4743                 case TOK_EXT6HDR:
4744                         fill_ext6hdr( cmd, *av );
4745                         av++;
4746                         break;
4747
4748                 case TOK_FLOWID:
4749                         if (proto != IPPROTO_IPV6 )
4750                                 errx( EX_USAGE, "flow-id filter is active "
4751                                     "only for ipv6 protocol\n");
4752                         fill_flow6( (ipfw_insn_u32 *) cmd, *av, cblen);
4753                         av++;
4754                         break;
4755
4756                 case TOK_COMMENT:
4757                         fill_comment(cmd, av, cblen);
4758                         av[0]=NULL;
4759                         break;
4760
4761                 case TOK_TAGGED:
4762                         if (av[0] && strpbrk(*av, "-,")) {
4763                                 if (!add_ports(cmd, *av, 0, O_TAGGED, cblen))
4764                                         errx(EX_DATAERR, "tagged: invalid tag"
4765                                             " list: %s", *av);
4766                         }
4767                         else {
4768                                 uint16_t tag;
4769
4770                                 GET_UINT_ARG(tag, IPFW_ARG_MIN, IPFW_ARG_MAX,
4771                                     TOK_TAGGED, rule_options);
4772                                 fill_cmd(cmd, O_TAGGED, 0, tag);
4773                         }
4774                         av++;
4775                         break;
4776
4777                 case TOK_FIB:
4778                         NEED1("fib requires fib number");
4779                         fill_cmd(cmd, O_FIB, 0, strtoul(*av, NULL, 0));
4780                         av++;
4781                         break;
4782                 case TOK_SOCKARG:
4783                         fill_cmd(cmd, O_SOCKARG, 0, 0);
4784                         break;
4785
4786                 case TOK_LOOKUP: {
4787                         ipfw_insn_u32 *c = (ipfw_insn_u32 *)cmd;
4788                         int j;
4789
4790                         if (!av[0] || !av[1])
4791                                 errx(EX_USAGE, "format: lookup argument tablenum");
4792                         cmd->opcode = O_IP_DST_LOOKUP;
4793                         cmd->len |= F_INSN_SIZE(ipfw_insn) + 2;
4794                         i = match_token(rule_options, *av);
4795                         for (j = 0; lookup_key[j] >= 0 ; j++) {
4796                                 if (i == lookup_key[j])
4797                                         break;
4798                         }
4799                         if (lookup_key[j] <= 0)
4800                                 errx(EX_USAGE, "format: cannot lookup on %s", *av);
4801                         __PAST_END(c->d, 1) = j; // i converted to option
4802                         av++;
4803
4804                         if ((j = pack_table(tstate, *av)) == 0)
4805                                 errx(EX_DATAERR, "Invalid table name: %s", *av);
4806
4807                         cmd->arg1 = j;
4808                         av++;
4809                     }
4810                         break;
4811                 case TOK_FLOW:
4812                         NEED1("missing table name");
4813                         if (strncmp(*av, "table(", 6) != 0)
4814                                 errx(EX_DATAERR,
4815                                     "enclose table name into \"table()\"");
4816                         fill_table(cmd, *av, O_IP_FLOW_LOOKUP, tstate);
4817                         av++;
4818                         break;
4819
4820                 default:
4821                         errx(EX_USAGE, "unrecognised option [%d] %s\n", i, s);
4822                 }
4823                 if (F_LEN(cmd) > 0) {   /* prepare to advance */
4824                         prev = cmd;
4825                         cmd = next_cmd(cmd, &cblen);
4826                 }
4827         }
4828
4829 done:
4830         /*
4831          * Now copy stuff into the rule.
4832          * If we have a keep-state option, the first instruction
4833          * must be a PROBE_STATE (which is generated here).
4834          * If we have a LOG option, it was stored as the first command,
4835          * and now must be moved to the top of the action part.
4836          */
4837         dst = (ipfw_insn *)rule->cmd;
4838
4839         /*
4840          * First thing to write into the command stream is the match probability.
4841          */
4842         if (match_prob != 1) { /* 1 means always match */
4843                 dst->opcode = O_PROB;
4844                 dst->len = 2;
4845                 *((int32_t *)(dst+1)) = (int32_t)(match_prob * 0x7fffffff);
4846                 dst += dst->len;
4847         }
4848
4849         /*
4850          * generate O_PROBE_STATE if necessary
4851          */
4852         if (have_state && have_state->opcode != O_CHECK_STATE) {
4853                 fill_cmd(dst, O_PROBE_STATE, 0, have_state->arg1);
4854                 dst = next_cmd(dst, &rblen);
4855         }
4856
4857         /* copy all commands but O_LOG, O_KEEP_STATE, O_LIMIT, O_ALTQ, O_TAG */
4858         for (src = (ipfw_insn *)cmdbuf; src != cmd; src += i) {
4859                 i = F_LEN(src);
4860                 CHECK_RBUFLEN(i);
4861
4862                 switch (src->opcode) {
4863                 case O_LOG:
4864                 case O_KEEP_STATE:
4865                 case O_LIMIT:
4866                 case O_ALTQ:
4867                 case O_TAG:
4868                         break;
4869                 default:
4870                         bcopy(src, dst, i * sizeof(uint32_t));
4871                         dst += i;
4872                 }
4873         }
4874
4875         /*
4876          * put back the have_state command as last opcode
4877          */
4878         if (have_state && have_state->opcode != O_CHECK_STATE) {
4879                 i = F_LEN(have_state);
4880                 CHECK_RBUFLEN(i);
4881                 bcopy(have_state, dst, i * sizeof(uint32_t));
4882                 dst += i;
4883         }
4884         /*
4885          * start action section
4886          */
4887         rule->act_ofs = dst - rule->cmd;
4888
4889         /* put back O_LOG, O_ALTQ, O_TAG if necessary */
4890         if (have_log) {
4891                 i = F_LEN(have_log);
4892                 CHECK_RBUFLEN(i);
4893                 bcopy(have_log, dst, i * sizeof(uint32_t));
4894                 dst += i;
4895         }
4896         if (have_altq) {
4897                 i = F_LEN(have_altq);
4898                 CHECK_RBUFLEN(i);
4899                 bcopy(have_altq, dst, i * sizeof(uint32_t));
4900                 dst += i;
4901         }
4902         if (have_tag) {
4903                 i = F_LEN(have_tag);
4904                 CHECK_RBUFLEN(i);
4905                 bcopy(have_tag, dst, i * sizeof(uint32_t));
4906                 dst += i;
4907         }
4908
4909         /*
4910          * copy all other actions
4911          */
4912         for (src = (ipfw_insn *)actbuf; src != action; src += i) {
4913                 i = F_LEN(src);
4914                 CHECK_RBUFLEN(i);
4915                 bcopy(src, dst, i * sizeof(uint32_t));
4916                 dst += i;
4917         }
4918
4919         rule->cmd_len = (uint32_t *)dst - (uint32_t *)(rule->cmd);
4920         *rbufsize = (char *)dst - (char *)rule;
4921 }
4922
4923 static int
4924 compare_ntlv(const void *_a, const void *_b)
4925 {
4926         ipfw_obj_ntlv *a, *b;
4927
4928         a = (ipfw_obj_ntlv *)_a;
4929         b = (ipfw_obj_ntlv *)_b;
4930
4931         if (a->set < b->set)
4932                 return (-1);
4933         else if (a->set > b->set)
4934                 return (1);
4935
4936         if (a->idx < b->idx)
4937                 return (-1);
4938         else if (a->idx > b->idx)
4939                 return (1);
4940
4941         if (a->head.type < b->head.type)
4942                 return (-1);
4943         else if (a->head.type > b->head.type)
4944                 return (1);
4945
4946         return (0);
4947 }
4948
4949 /*
4950  * Provide kernel with sorted list of referenced objects
4951  */
4952 static void
4953 object_sort_ctlv(ipfw_obj_ctlv *ctlv)
4954 {
4955
4956         qsort(ctlv + 1, ctlv->count, ctlv->objsize, compare_ntlv);
4957 }
4958
4959 struct object_kt {
4960         uint16_t        uidx;
4961         uint16_t        type;
4962 };
4963 static int
4964 compare_object_kntlv(const void *k, const void *v)
4965 {
4966         ipfw_obj_ntlv *ntlv;
4967         struct object_kt key;
4968
4969         key = *((struct object_kt *)k);
4970         ntlv = (ipfw_obj_ntlv *)v;
4971
4972         if (key.uidx < ntlv->idx)
4973                 return (-1);
4974         else if (key.uidx > ntlv->idx)
4975                 return (1);
4976
4977         if (key.type < ntlv->head.type)
4978                 return (-1);
4979         else if (key.type > ntlv->head.type)
4980                 return (1);
4981
4982         return (0);
4983 }
4984
4985 /*
4986  * Finds object name in @ctlv by @idx and @type.
4987  * Uses the following facts:
4988  * 1) All TLVs are the same size
4989  * 2) Kernel implementation provides already sorted list.
4990  *
4991  * Returns table name or NULL.
4992  */
4993 static char *
4994 object_search_ctlv(ipfw_obj_ctlv *ctlv, uint16_t idx, uint16_t type)
4995 {
4996         ipfw_obj_ntlv *ntlv;
4997         struct object_kt key;
4998
4999         key.uidx = idx;
5000         key.type = type;
5001
5002         ntlv = bsearch(&key, (ctlv + 1), ctlv->count, ctlv->objsize,
5003             compare_object_kntlv);
5004
5005         if (ntlv != NULL)
5006                 return (ntlv->name);
5007
5008         return (NULL);
5009 }
5010
5011 static char *
5012 table_search_ctlv(ipfw_obj_ctlv *ctlv, uint16_t idx)
5013 {
5014
5015         return (object_search_ctlv(ctlv, idx, IPFW_TLV_TBL_NAME));
5016 }
5017
5018 /*
5019  * Adds one or more rules to ipfw chain.
5020  * Data layout:
5021  * Request:
5022  * [
5023  *   ip_fw3_opheader
5024  *   [ ipfw_obj_ctlv(IPFW_TLV_TBL_LIST) ipfw_obj_ntlv x N ] (optional *1)
5025  *   [ ipfw_obj_ctlv(IPFW_TLV_RULE_LIST) [ ip_fw_rule ip_fw_insn ] x N ] (*2) (*3)
5026  * ]
5027  * Reply:
5028  * [
5029  *   ip_fw3_opheader
5030  *   [ ipfw_obj_ctlv(IPFW_TLV_TBL_LIST) ipfw_obj_ntlv x N ] (optional)
5031  *   [ ipfw_obj_ctlv(IPFW_TLV_RULE_LIST) [ ip_fw_rule ip_fw_insn ] x N ]
5032  * ]
5033  *
5034  * Rules in reply are modified to store their actual ruleset number.
5035  *
5036  * (*1) TLVs inside IPFW_TLV_TBL_LIST needs to be sorted ascending
5037  * according to their idx field and there has to be no duplicates.
5038  * (*2) Numbered rules inside IPFW_TLV_RULE_LIST needs to be sorted ascending.
5039  * (*3) Each ip_fw structure needs to be aligned to u64 boundary.
5040  */
5041 void
5042 ipfw_add(char *av[])
5043 {
5044         uint32_t rulebuf[1024];
5045         int rbufsize, default_off, tlen, rlen;
5046         size_t sz;
5047         struct tidx ts;
5048         struct ip_fw_rule *rule;
5049         caddr_t tbuf;
5050         ip_fw3_opheader *op3;
5051         ipfw_obj_ctlv *ctlv, *tstate;
5052
5053         rbufsize = sizeof(rulebuf);
5054         memset(rulebuf, 0, rbufsize);
5055         memset(&ts, 0, sizeof(ts));
5056
5057         /* Optimize case with no tables */
5058         default_off = sizeof(ipfw_obj_ctlv) + sizeof(ip_fw3_opheader);
5059         op3 = (ip_fw3_opheader *)rulebuf;
5060         ctlv = (ipfw_obj_ctlv *)(op3 + 1);
5061         rule = (struct ip_fw_rule *)(ctlv + 1);
5062         rbufsize -= default_off;
5063
5064         compile_rule(av, (uint32_t *)rule, &rbufsize, &ts);
5065         /* Align rule size to u64 boundary */
5066         rlen = roundup2(rbufsize, sizeof(uint64_t));
5067
5068         tbuf = NULL;
5069         sz = 0;
5070         tstate = NULL;
5071         if (ts.count != 0) {
5072                 /* Some tables. We have to alloc more data */
5073                 tlen = ts.count * sizeof(ipfw_obj_ntlv);
5074                 sz = default_off + sizeof(ipfw_obj_ctlv) + tlen + rlen;
5075
5076                 if ((tbuf = calloc(1, sz)) == NULL)
5077                         err(EX_UNAVAILABLE, "malloc() failed for IP_FW_ADD");
5078                 op3 = (ip_fw3_opheader *)tbuf;
5079                 /* Tables first */
5080                 ctlv = (ipfw_obj_ctlv *)(op3 + 1);
5081                 ctlv->head.type = IPFW_TLV_TBLNAME_LIST;
5082                 ctlv->head.length = sizeof(ipfw_obj_ctlv) + tlen;
5083                 ctlv->count = ts.count;
5084                 ctlv->objsize = sizeof(ipfw_obj_ntlv);
5085                 memcpy(ctlv + 1, ts.idx, tlen);
5086                 object_sort_ctlv(ctlv);
5087                 tstate = ctlv;
5088                 /* Rule next */
5089                 ctlv = (ipfw_obj_ctlv *)((caddr_t)ctlv + ctlv->head.length);
5090                 ctlv->head.type = IPFW_TLV_RULE_LIST;
5091                 ctlv->head.length = sizeof(ipfw_obj_ctlv) + rlen;
5092                 ctlv->count = 1;
5093                 memcpy(ctlv + 1, rule, rbufsize);
5094         } else {
5095                 /* Simply add header */
5096                 sz = rlen + default_off;
5097                 memset(ctlv, 0, sizeof(*ctlv));
5098                 ctlv->head.type = IPFW_TLV_RULE_LIST;
5099                 ctlv->head.length = sizeof(ipfw_obj_ctlv) + rlen;
5100                 ctlv->count = 1;
5101         }
5102
5103         if (do_get3(IP_FW_XADD, op3, &sz) != 0)
5104                 err(EX_UNAVAILABLE, "getsockopt(%s)", "IP_FW_XADD");
5105
5106         if (!co.do_quiet) {
5107                 struct format_opts sfo;
5108                 struct buf_pr bp;
5109                 memset(&sfo, 0, sizeof(sfo));
5110                 sfo.tstate = tstate;
5111                 sfo.set_mask = (uint32_t)(-1);
5112                 bp_alloc(&bp, 4096);
5113                 show_static_rule(&co, &sfo, &bp, rule, NULL);
5114                 printf("%s", bp.buf);
5115                 bp_free(&bp);
5116         }
5117
5118         if (tbuf != NULL)
5119                 free(tbuf);
5120
5121         if (ts.idx != NULL)
5122                 free(ts.idx);
5123 }
5124
5125 /*
5126  * clear the counters or the log counters.
5127  * optname has the following values:
5128  *  0 (zero both counters and logging)
5129  *  1 (zero logging only)
5130  */
5131 void
5132 ipfw_zero(int ac, char *av[], int optname)
5133 {
5134         ipfw_range_tlv rt;
5135         uint32_t arg;
5136         int failed = EX_OK;
5137         char const *errstr;
5138         char const *name = optname ? "RESETLOG" : "ZERO";
5139
5140         optname = optname ? IP_FW_XRESETLOG : IP_FW_XZERO;
5141         memset(&rt, 0, sizeof(rt));
5142
5143         av++; ac--;
5144
5145         if (ac == 0) {
5146                 /* clear all entries */
5147                 rt.flags = IPFW_RCFLAG_ALL;
5148                 if (do_range_cmd(optname, &rt) < 0)
5149                         err(EX_UNAVAILABLE, "setsockopt(IP_FW_X%s)", name);
5150                 if (!co.do_quiet)
5151                         printf("%s.\n", optname == IP_FW_XZERO ?
5152                             "Accounting cleared":"Logging counts reset");
5153
5154                 return;
5155         }
5156
5157         while (ac) {
5158                 /* Rule number */
5159                 if (isdigit(**av)) {
5160                         arg = strtonum(*av, 0, 0xffff, &errstr);
5161                         if (errstr)
5162                                 errx(EX_DATAERR,
5163                                     "invalid rule number %s\n", *av);
5164                         rt.start_rule = arg;
5165                         rt.end_rule = arg;
5166                         rt.flags |= IPFW_RCFLAG_RANGE;
5167                         if (co.use_set != 0) {
5168                                 rt.set = co.use_set - 1;
5169                                 rt.flags |= IPFW_RCFLAG_SET;
5170                         }
5171                         if (do_range_cmd(optname, &rt) != 0) {
5172                                 warn("rule %u: setsockopt(IP_FW_X%s)",
5173                                     arg, name);
5174                                 failed = EX_UNAVAILABLE;
5175                         } else if (rt.new_set == 0) {
5176                                 printf("Entry %d not found\n", arg);
5177                                 failed = EX_UNAVAILABLE;
5178                         } else if (!co.do_quiet)
5179                                 printf("Entry %d %s.\n", arg,
5180                                     optname == IP_FW_XZERO ?
5181                                         "cleared" : "logging count reset");
5182                 } else {
5183                         errx(EX_USAGE, "invalid rule number ``%s''", *av);
5184                 }
5185                 av++; ac--;
5186         }
5187         if (failed != EX_OK)
5188                 exit(failed);
5189 }
5190
5191 void
5192 ipfw_flush(int force)
5193 {
5194         ipfw_range_tlv rt;
5195
5196         if (!force && !co.do_quiet) { /* need to ask user */
5197                 int c;
5198
5199                 printf("Are you sure? [yn] ");
5200                 fflush(stdout);
5201                 do {
5202                         c = toupper(getc(stdin));
5203                         while (c != '\n' && getc(stdin) != '\n')
5204                                 if (feof(stdin))
5205                                         return; /* and do not flush */
5206                 } while (c != 'Y' && c != 'N');
5207                 printf("\n");
5208                 if (c == 'N')   /* user said no */
5209                         return;
5210         }
5211         if (co.do_pipe) {
5212                 dummynet_flush();
5213                 return;
5214         }
5215         /* `ipfw set N flush` - is the same that `ipfw delete set N` */
5216         memset(&rt, 0, sizeof(rt));
5217         if (co.use_set != 0) {
5218                 rt.set = co.use_set - 1;
5219                 rt.flags = IPFW_RCFLAG_SET;
5220         } else
5221                 rt.flags = IPFW_RCFLAG_ALL;
5222         if (do_range_cmd(IP_FW_XDEL, &rt) != 0)
5223                         err(EX_UNAVAILABLE, "setsockopt(IP_FW_XDEL)");
5224         if (!co.do_quiet)
5225                 printf("Flushed all %s.\n", co.do_pipe ? "pipes" : "rules");
5226 }
5227
5228 static struct _s_x intcmds[] = {
5229       { "talist",       TOK_TALIST },
5230       { "iflist",       TOK_IFLIST },
5231       { "olist",        TOK_OLIST },
5232       { "vlist",        TOK_VLIST },
5233       { NULL, 0 }
5234 };
5235
5236 static struct _s_x otypes[] = {
5237         { "EACTION",    IPFW_TLV_EACTION },
5238         { "DYNSTATE",   IPFW_TLV_STATE_NAME },
5239         { NULL, 0 }
5240 };
5241
5242 static const char*
5243 lookup_eaction_name(ipfw_obj_ntlv *ntlv, int cnt, uint16_t type)
5244 {
5245         const char *name;
5246         int i;
5247
5248         name = NULL;
5249         for (i = 0; i < cnt; i++) {
5250                 if (ntlv[i].head.type != IPFW_TLV_EACTION)
5251                         continue;
5252                 if (IPFW_TLV_EACTION_NAME(ntlv[i].idx) != type)
5253                         continue;
5254                 name = ntlv[i].name;
5255                 break;
5256         }
5257         return (name);
5258 }
5259
5260 static void
5261 ipfw_list_objects(int ac, char *av[])
5262 {
5263         ipfw_obj_lheader req, *olh;
5264         ipfw_obj_ntlv *ntlv;
5265         const char *name;
5266         size_t sz;
5267         int i;
5268
5269         memset(&req, 0, sizeof(req));
5270         sz = sizeof(req);
5271         if (do_get3(IP_FW_DUMP_SRVOBJECTS, &req.opheader, &sz) != 0)
5272                 if (errno != ENOMEM)
5273                         return;
5274
5275         sz = req.size;
5276         if ((olh = calloc(1, sz)) == NULL)
5277                 return;
5278
5279         olh->size = sz;
5280         if (do_get3(IP_FW_DUMP_SRVOBJECTS, &olh->opheader, &sz) != 0) {
5281                 free(olh);
5282                 return;
5283         }
5284
5285         if (olh->count > 0)
5286                 printf("Objects list:\n");
5287         else
5288                 printf("There are no objects\n");
5289         ntlv = (ipfw_obj_ntlv *)(olh + 1);
5290         for (i = 0; i < olh->count; i++) {
5291                 name = match_value(otypes, ntlv->head.type);
5292                 if (name == NULL)
5293                         name = lookup_eaction_name(
5294                             (ipfw_obj_ntlv *)(olh + 1), olh->count,
5295                             ntlv->head.type);
5296                 if (name == NULL)
5297                         printf(" kidx: %4d\ttype: %10d\tname: %s\n",
5298                             ntlv->idx, ntlv->head.type, ntlv->name);
5299                 else
5300                         printf(" kidx: %4d\ttype: %10s\tname: %s\n",
5301                             ntlv->idx, name, ntlv->name);
5302                 ntlv++;
5303         }
5304         free(olh);
5305 }
5306
5307 void
5308 ipfw_internal_handler(int ac, char *av[])
5309 {
5310         int tcmd;
5311
5312         ac--; av++;
5313         NEED1("internal cmd required");
5314
5315         if ((tcmd = match_token(intcmds, *av)) == -1)
5316                 errx(EX_USAGE, "invalid internal sub-cmd: %s", *av);
5317
5318         switch (tcmd) {
5319         case TOK_IFLIST:
5320                 ipfw_list_tifaces();
5321                 break;
5322         case TOK_TALIST:
5323                 ipfw_list_ta(ac, av);
5324                 break;
5325         case TOK_OLIST:
5326                 ipfw_list_objects(ac, av);
5327                 break;
5328         case TOK_VLIST:
5329                 ipfw_list_values(ac, av);
5330                 break;
5331         }
5332 }
5333
5334 static int
5335 ipfw_get_tracked_ifaces(ipfw_obj_lheader **polh)
5336 {
5337         ipfw_obj_lheader req, *olh;
5338         size_t sz;
5339
5340         memset(&req, 0, sizeof(req));
5341         sz = sizeof(req);
5342
5343         if (do_get3(IP_FW_XIFLIST, &req.opheader, &sz) != 0) {
5344                 if (errno != ENOMEM)
5345                         return (errno);
5346         }
5347
5348         sz = req.size;
5349         if ((olh = calloc(1, sz)) == NULL)
5350                 return (ENOMEM);
5351
5352         olh->size = sz;
5353         if (do_get3(IP_FW_XIFLIST, &olh->opheader, &sz) != 0) {
5354                 free(olh);
5355                 return (errno);
5356         }
5357
5358         *polh = olh;
5359         return (0);
5360 }
5361
5362 static int
5363 ifinfo_cmp(const void *a, const void *b)
5364 {
5365         ipfw_iface_info *ia, *ib;
5366
5367         ia = (ipfw_iface_info *)a;
5368         ib = (ipfw_iface_info *)b;
5369
5370         return (stringnum_cmp(ia->ifname, ib->ifname));
5371 }
5372
5373 /*
5374  * Retrieves table list from kernel,
5375  * optionally sorts it and calls requested function for each table.
5376  * Returns 0 on success.
5377  */
5378 static void
5379 ipfw_list_tifaces()
5380 {
5381         ipfw_obj_lheader *olh;
5382         ipfw_iface_info *info;
5383         int i, error;
5384
5385         if ((error = ipfw_get_tracked_ifaces(&olh)) != 0)
5386                 err(EX_OSERR, "Unable to request ipfw tracked interface list");
5387
5388
5389         qsort(olh + 1, olh->count, olh->objsize, ifinfo_cmp);
5390
5391         info = (ipfw_iface_info *)(olh + 1);
5392         for (i = 0; i < olh->count; i++) {
5393                 if (info->flags & IPFW_IFFLAG_RESOLVED)
5394                         printf("%s ifindex: %d refcount: %u changes: %u\n",
5395                             info->ifname, info->ifindex, info->refcnt,
5396                             info->gencnt);
5397                 else
5398                         printf("%s ifindex: unresolved refcount: %u changes: %u\n",
5399                             info->ifname, info->refcnt, info->gencnt);
5400                 info = (ipfw_iface_info *)((caddr_t)info + olh->objsize);
5401         }
5402
5403         free(olh);
5404 }
5405
5406
5407
5408