sbin/ipfw/ipfw2.c

   1 /*
   2  * Copyright (c) 2002-2003 Luigi Rizzo
   3  * Copyright (c) 1996 Alex Nash, Paul Traina, Poul-Henning Kamp
   4  * Copyright (c) 1994 Ugen J.S.Antsilevich
   5  *
   6  * Idea and grammar partially left from:
   7  * Copyright (c) 1993 Daniel Boulet
   8  *
   9  * Redistribution and use in source forms, with and without modification,
  10  * are permitted provided that this entire comment appears intact.
  11  *
  12  * Redistribution in binary form may occur without any restrictions.
  13  * Obviously, it would be nice if you gave credit where credit is due
  14  * but requiring it would be too onerous.
  15  *
  16  * This software is provided ``AS IS'' without any warranties of any kind.
  17  *
  18  * NEW command line interface for IP firewall facility
  19  *
  20  * $FreeBSD$
  21  */
  22
  23 #include <sys/types.h>
  24 #include <sys/param.h>
  25 #include <sys/socket.h>
  26 #include <sys/sockio.h>
  27 #include <sys/sysctl.h>
  28
  29 #include "ipfw2.h"
  30
  31 #include <ctype.h>
  32 #include <err.h>
  33 #include <errno.h>
  34 #include <grp.h>
  35 #include <netdb.h>
  36 #include <pwd.h>
  37 #include <stdio.h>
  38 #include <stdarg.h>
  39 #include <stdint.h>
  40 #include <stdlib.h>
  41 #include <string.h>
  42 #include <sysexits.h>
  43 #include <time.h>       /* ctime */
  44 #include <timeconv.h>   /* _long_to_time */
  45 #include <unistd.h>
  46 #include <fcntl.h>
  47 #include <stddef.h>     /* offsetof */
  48
  49 #include <net/ethernet.h>
  50 #include <net/if.h>             /* only IFNAMSIZ */
  51 #include <netinet/in.h>
  52 #include <netinet/in_systm.h>   /* only n_short, n_long */
  53 #include <netinet/ip.h>
  54 #include <netinet/ip_icmp.h>
  55 #include <netinet/ip_fw.h>
  56 #include <netinet/tcp.h>
  57 #include <arpa/inet.h>
  58
  59 struct cmdline_opts co; /* global options */
  60
  61 struct format_opts {
  62         int bcwidth;
  63         int pcwidth;
  64         int show_counters;
  65         int show_time;          /* show timestamp */
  66         uint32_t set_mask;      /* enabled sets mask */
  67         uint32_t flags;         /* request flags */
  68         uint32_t first;         /* first rule to request */
  69         uint32_t last;          /* last rule to request */
  70         uint32_t dcnt;          /* number of dynamic states */
  71         ipfw_obj_ctlv *tstate;  /* table state data */
  72 };
  73
  74 int resvd_set_number = RESVD_SET;
  75
  76 int ipfw_socket = -1;
  77
  78 #define CHECK_LENGTH(v, len) do {                               \
  79         if ((v) < (len))                                        \
  80                 errx(EX_DATAERR, "Rule too long");              \
  81         } while (0)
  82 /*
  83  * Check if we have enough space in cmd buffer. Note that since
  84  * first 8? u32 words are reserved by reserved header, full cmd
  85  * buffer can't be used, so we need to protect from buffer overrun
  86  * only. At the beginning, cblen is less than actual buffer size by
  87  * size of ipfw_insn_u32 instruction + 1 u32 work. This eliminates need
  88  * for checking small instructions fitting in given range.
  89  * We also (ab)use the fact that ipfw_insn is always the first field
  90  * for any custom instruction.
  91  */
  92 #define CHECK_CMDLEN    CHECK_LENGTH(cblen, F_LEN((ipfw_insn *)cmd))
  93
  94 #define GET_UINT_ARG(arg, min, max, tok, s_x) do {                      \
  95         if (!av[0])                                                     \
  96                 errx(EX_USAGE, "%s: missing argument", match_value(s_x, tok)); \
  97         if (_substrcmp(*av, "tablearg") == 0) {                         \
  98                 arg = IP_FW_TARG;                                       \
  99                 break;                                                  \
 100         }                                                               \
 101                                                                         \
 102         {                                                               \
 103         long _xval;                                                     \
 104         char *end;                                                      \
 105                                                                         \
 106         _xval = strtol(*av, &end, 10);                                  \
 107                                                                         \
 108         if (!isdigit(**av) || *end != '\0' || (_xval == 0 && errno == EINVAL)) \
 109                 errx(EX_DATAERR, "%s: invalid argument: %s",            \
 110                     match_value(s_x, tok), *av);                        \
 111                                                                         \
 112         if (errno == ERANGE || _xval < min || _xval > max)              \
 113                 errx(EX_DATAERR, "%s: argument is out of range (%u..%u): %s", \
 114                     match_value(s_x, tok), min, max, *av);              \
 115                                                                         \
 116         if (_xval == IP_FW_TARG)                                        \
 117                 errx(EX_DATAERR, "%s: illegal argument value: %s",      \
 118                     match_value(s_x, tok), *av);                        \
 119         arg = _xval;                                                    \
 120         }                                                               \
 121 } while (0)
 122
 123 static struct _s_x f_tcpflags[] = {
 124         { "syn", TH_SYN },
 125         { "fin", TH_FIN },
 126         { "ack", TH_ACK },
 127         { "psh", TH_PUSH },
 128         { "rst", TH_RST },
 129         { "urg", TH_URG },
 130         { "tcp flag", 0 },
 131         { NULL, 0 }
 132 };
 133
 134 static struct _s_x f_tcpopts[] = {
 135         { "mss",        IP_FW_TCPOPT_MSS },
 136         { "maxseg",     IP_FW_TCPOPT_MSS },
 137         { "window",     IP_FW_TCPOPT_WINDOW },
 138         { "sack",       IP_FW_TCPOPT_SACK },
 139         { "ts",         IP_FW_TCPOPT_TS },
 140         { "timestamp",  IP_FW_TCPOPT_TS },
 141         { "cc",         IP_FW_TCPOPT_CC },
 142         { "tcp option", 0 },
 143         { NULL, 0 }
 144 };
 145
 146 /*
 147  * IP options span the range 0 to 255 so we need to remap them
 148  * (though in fact only the low 5 bits are significant).
 149  */
 150 static struct _s_x f_ipopts[] = {
 151         { "ssrr",       IP_FW_IPOPT_SSRR},
 152         { "lsrr",       IP_FW_IPOPT_LSRR},
 153         { "rr",         IP_FW_IPOPT_RR},
 154         { "ts",         IP_FW_IPOPT_TS},
 155         { "ip option",  0 },
 156         { NULL, 0 }
 157 };
 158
 159 static struct _s_x f_iptos[] = {
 160         { "lowdelay",   IPTOS_LOWDELAY},
 161         { "throughput", IPTOS_THROUGHPUT},
 162         { "reliability", IPTOS_RELIABILITY},
 163         { "mincost",    IPTOS_MINCOST},
 164         { "congestion", IPTOS_ECN_CE},
 165         { "ecntransport", IPTOS_ECN_ECT0},
 166         { "ip tos option", 0},
 167         { NULL, 0 }
 168 };
 169
 170 struct _s_x f_ipdscp[] = {
 171         { "af11", IPTOS_DSCP_AF11 >> 2 },       /* 001010 */
 172         { "af12", IPTOS_DSCP_AF12 >> 2 },       /* 001100 */
 173         { "af13", IPTOS_DSCP_AF13 >> 2 },       /* 001110 */
 174         { "af21", IPTOS_DSCP_AF21 >> 2 },       /* 010010 */
 175         { "af22", IPTOS_DSCP_AF22 >> 2 },       /* 010100 */
 176         { "af23", IPTOS_DSCP_AF23 >> 2 },       /* 010110 */
 177         { "af31", IPTOS_DSCP_AF31 >> 2 },       /* 011010 */
 178         { "af32", IPTOS_DSCP_AF32 >> 2 },       /* 011100 */
 179         { "af33", IPTOS_DSCP_AF33 >> 2 },       /* 011110 */
 180         { "af41", IPTOS_DSCP_AF41 >> 2 },       /* 100010 */
 181         { "af42", IPTOS_DSCP_AF42 >> 2 },       /* 100100 */
 182         { "af43", IPTOS_DSCP_AF43 >> 2 },       /* 100110 */
 183         { "be", IPTOS_DSCP_CS0 >> 2 },  /* 000000 */
 184         { "ef", IPTOS_DSCP_EF >> 2 },   /* 101110 */
 185         { "cs0", IPTOS_DSCP_CS0 >> 2 }, /* 000000 */
 186         { "cs1", IPTOS_DSCP_CS1 >> 2 }, /* 001000 */
 187         { "cs2", IPTOS_DSCP_CS2 >> 2 }, /* 010000 */
 188         { "cs3", IPTOS_DSCP_CS3 >> 2 }, /* 011000 */
 189         { "cs4", IPTOS_DSCP_CS4 >> 2 }, /* 100000 */
 190         { "cs5", IPTOS_DSCP_CS5 >> 2 }, /* 101000 */
 191         { "cs6", IPTOS_DSCP_CS6 >> 2 }, /* 110000 */
 192         { "cs7", IPTOS_DSCP_CS7 >> 2 }, /* 100000 */
 193         { NULL, 0 }
 194 };
 195
 196 static struct _s_x limit_masks[] = {
 197         {"all",         DYN_SRC_ADDR|DYN_SRC_PORT|DYN_DST_ADDR|DYN_DST_PORT},
 198         {"src-addr",    DYN_SRC_ADDR},
 199         {"src-port",    DYN_SRC_PORT},
 200         {"dst-addr",    DYN_DST_ADDR},
 201         {"dst-port",    DYN_DST_PORT},
 202         {NULL,          0}
 203 };
 204
 205 /*
 206  * we use IPPROTO_ETHERTYPE as a fake protocol id to call the print routines
 207  * This is only used in this code.
 208  */
 209 #define IPPROTO_ETHERTYPE       0x1000
 210 static struct _s_x ether_types[] = {
 211     /*
 212      * Note, we cannot use "-:&/" in the names because they are field
 213      * separators in the type specifications. Also, we use s = NULL as
 214      * end-delimiter, because a type of 0 can be legal.
 215      */
 216         { "ip",         0x0800 },
 217         { "ipv4",       0x0800 },
 218         { "ipv6",       0x86dd },
 219         { "arp",        0x0806 },
 220         { "rarp",       0x8035 },
 221         { "vlan",       0x8100 },
 222         { "loop",       0x9000 },
 223         { "trail",      0x1000 },
 224         { "at",         0x809b },
 225         { "atalk",      0x809b },
 226         { "aarp",       0x80f3 },
 227         { "pppoe_disc", 0x8863 },
 228         { "pppoe_sess", 0x8864 },
 229         { "ipx_8022",   0x00E0 },
 230         { "ipx_8023",   0x0000 },
 231         { "ipx_ii",     0x8137 },
 232         { "ipx_snap",   0x8137 },
 233         { "ipx",        0x8137 },
 234         { "ns",         0x0600 },
 235         { NULL,         0 }
 236 };
 237
 238 static struct _s_x rule_eactions[] = {
 239         { "nat64lsn",           TOK_NAT64LSN },
 240         { "nat64stl",           TOK_NAT64STL },
 241         { "nptv6",              TOK_NPTV6 },
 242         { "tcp-setmss",         TOK_TCPSETMSS },
 243         { NULL, 0 }     /* terminator */
 244 };
 245
 246 static struct _s_x rule_actions[] = {
 247         { "abort6",             TOK_ABORT6 },
 248         { "abort",              TOK_ABORT },
 249         { "accept",             TOK_ACCEPT },
 250         { "pass",               TOK_ACCEPT },
 251         { "allow",              TOK_ACCEPT },
 252         { "permit",             TOK_ACCEPT },
 253         { "count",              TOK_COUNT },
 254         { "pipe",               TOK_PIPE },
 255         { "queue",              TOK_QUEUE },
 256         { "divert",             TOK_DIVERT },
 257         { "tee",                TOK_TEE },
 258         { "netgraph",           TOK_NETGRAPH },
 259         { "ngtee",              TOK_NGTEE },
 260         { "fwd",                TOK_FORWARD },
 261         { "forward",            TOK_FORWARD },
 262         { "skipto",             TOK_SKIPTO },
 263         { "deny",               TOK_DENY },
 264         { "drop",               TOK_DENY },
 265         { "reject",             TOK_REJECT },
 266         { "reset6",             TOK_RESET6 },
 267         { "reset",              TOK_RESET },
 268         { "unreach6",           TOK_UNREACH6 },
 269         { "unreach",            TOK_UNREACH },
 270         { "check-state",        TOK_CHECKSTATE },
 271         { "//",                 TOK_COMMENT },
 272         { "nat",                TOK_NAT },
 273         { "reass",              TOK_REASS },
 274         { "setfib",             TOK_SETFIB },
 275         { "setdscp",            TOK_SETDSCP },
 276         { "call",               TOK_CALL },
 277         { "return",             TOK_RETURN },
 278         { "eaction",            TOK_EACTION },
 279         { "tcp-setmss",         TOK_TCPSETMSS },
 280         { NULL, 0 }     /* terminator */
 281 };
 282
 283 static struct _s_x rule_action_params[] = {
 284         { "altq",               TOK_ALTQ },
 285         { "log",                TOK_LOG },
 286         { "tag",                TOK_TAG },
 287         { "untag",              TOK_UNTAG },
 288         { NULL, 0 }     /* terminator */
 289 };
 290
 291 /*
 292  * The 'lookup' instruction accepts one of the following arguments.
 293  * -1 is a terminator for the list.
 294  * Arguments are passed as v[1] in O_DST_LOOKUP options.
 295  */
 296 static int lookup_key[] = {
 297         TOK_DSTIP, TOK_SRCIP, TOK_DSTPORT, TOK_SRCPORT,
 298         TOK_UID, TOK_JAIL, TOK_DSCP, -1 };
 299
 300 static struct _s_x rule_options[] = {
 301         { "tagged",             TOK_TAGGED },
 302         { "uid",                TOK_UID },
 303         { "gid",                TOK_GID },
 304         { "jail",               TOK_JAIL },
 305         { "in",                 TOK_IN },
 306         { "limit",              TOK_LIMIT },
 307         { "keep-state",         TOK_KEEPSTATE },
 308         { "bridged",            TOK_LAYER2 },
 309         { "layer2",             TOK_LAYER2 },
 310         { "out",                TOK_OUT },
 311         { "diverted",           TOK_DIVERTED },
 312         { "diverted-loopback",  TOK_DIVERTEDLOOPBACK },
 313         { "diverted-output",    TOK_DIVERTEDOUTPUT },
 314         { "xmit",               TOK_XMIT },
 315         { "recv",               TOK_RECV },
 316         { "via",                TOK_VIA },
 317         { "fragment",           TOK_FRAG },
 318         { "frag",               TOK_FRAG },
 319         { "fib",                TOK_FIB },
 320         { "ipoptions",          TOK_IPOPTS },
 321         { "ipopts",             TOK_IPOPTS },
 322         { "iplen",              TOK_IPLEN },
 323         { "ipid",               TOK_IPID },
 324         { "ipprecedence",       TOK_IPPRECEDENCE },
 325         { "dscp",               TOK_DSCP },
 326         { "iptos",              TOK_IPTOS },
 327         { "ipttl",              TOK_IPTTL },
 328         { "ipversion",          TOK_IPVER },
 329         { "ipver",              TOK_IPVER },
 330         { "estab",              TOK_ESTAB },
 331         { "established",        TOK_ESTAB },
 332         { "setup",              TOK_SETUP },
 333         { "sockarg",            TOK_SOCKARG },
 334         { "tcpdatalen",         TOK_TCPDATALEN },
 335         { "tcpflags",           TOK_TCPFLAGS },
 336         { "tcpflgs",            TOK_TCPFLAGS },
 337         { "tcpoptions",         TOK_TCPOPTS },
 338         { "tcpopts",            TOK_TCPOPTS },
 339         { "tcpseq",             TOK_TCPSEQ },
 340         { "tcpack",             TOK_TCPACK },
 341         { "tcpwin",             TOK_TCPWIN },
 342         { "icmptype",           TOK_ICMPTYPES },
 343         { "icmptypes",          TOK_ICMPTYPES },
 344         { "dst-ip",             TOK_DSTIP },
 345         { "src-ip",             TOK_SRCIP },
 346         { "dst-port",           TOK_DSTPORT },
 347         { "src-port",           TOK_SRCPORT },
 348         { "proto",              TOK_PROTO },
 349         { "MAC",                TOK_MAC },
 350         { "mac",                TOK_MAC },
 351         { "mac-type",           TOK_MACTYPE },
 352         { "verrevpath",         TOK_VERREVPATH },
 353         { "versrcreach",        TOK_VERSRCREACH },
 354         { "antispoof",          TOK_ANTISPOOF },
 355         { "ipsec",              TOK_IPSEC },
 356         { "icmp6type",          TOK_ICMP6TYPES },
 357         { "icmp6types",         TOK_ICMP6TYPES },
 358         { "ext6hdr",            TOK_EXT6HDR},
 359         { "flow-id",            TOK_FLOWID},
 360         { "ipv6",               TOK_IPV6},
 361         { "ip6",                TOK_IPV6},
 362         { "ipv4",               TOK_IPV4},
 363         { "ip4",                TOK_IPV4},
 364         { "dst-ipv6",           TOK_DSTIP6},
 365         { "dst-ip6",            TOK_DSTIP6},
 366         { "src-ipv6",           TOK_SRCIP6},
 367         { "src-ip6",            TOK_SRCIP6},
 368         { "lookup",             TOK_LOOKUP},
 369         { "flow",               TOK_FLOW},
 370         { "//",                 TOK_COMMENT },
 371
 372         { "not",                TOK_NOT },              /* pseudo option */
 373         { "!", /* escape ? */   TOK_NOT },              /* pseudo option */
 374         { "or",                 TOK_OR },               /* pseudo option */
 375         { "|", /* escape */     TOK_OR },               /* pseudo option */
 376         { "{",                  TOK_STARTBRACE },       /* pseudo option */
 377         { "(",                  TOK_STARTBRACE },       /* pseudo option */
 378         { "}",                  TOK_ENDBRACE },         /* pseudo option */
 379         { ")",                  TOK_ENDBRACE },         /* pseudo option */
 380         { NULL, 0 }     /* terminator */
 381 };
 382
 383 void bprint_uint_arg(struct buf_pr *bp, const char *str, uint32_t arg);
 384 static int ipfw_get_config(struct cmdline_opts *co, struct format_opts *fo,
 385     ipfw_cfg_lheader **pcfg, size_t *psize);
 386 static int ipfw_show_config(struct cmdline_opts *co, struct format_opts *fo,
 387     ipfw_cfg_lheader *cfg, size_t sz, int ac, char **av);
 388 static void ipfw_list_tifaces(void);
 389
 390 struct tidx;
 391 static uint16_t pack_object(struct tidx *tstate, char *name, int otype);
 392 static uint16_t pack_table(struct tidx *tstate, char *name);
 393
 394 static char *table_search_ctlv(ipfw_obj_ctlv *ctlv, uint16_t idx);
 395 static void object_sort_ctlv(ipfw_obj_ctlv *ctlv);
 396 static char *object_search_ctlv(ipfw_obj_ctlv *ctlv, uint16_t idx,
 397     uint16_t type);
 398
 399 /*
 400  * Simple string buffer API.
 401  * Used to simplify buffer passing between function and for
 402  * transparent overrun handling.
 403  */
 404
 405 /*
 406  * Allocates new buffer of given size @sz.
 407  *
 408  * Returns 0 on success.
 409  */
 410 int
 411 bp_alloc(struct buf_pr *b, size_t size)
 412 {
 413         memset(b, 0, sizeof(struct buf_pr));
 414
 415         if ((b->buf = calloc(1, size)) == NULL)
 416                 return (ENOMEM);
 417
 418         b->ptr = b->buf;
 419         b->size = size;
 420         b->avail = b->size;
 421
 422         return (0);
 423 }
 424
 425 void
 426 bp_free(struct buf_pr *b)
 427 {
 428
 429         free(b->buf);
 430 }
 431
 432 /*
 433  * Flushes buffer so new writer start from beginning.
 434  */
 435 void
 436 bp_flush(struct buf_pr *b)
 437 {
 438
 439         b->ptr = b->buf;
 440         b->avail = b->size;
 441         b->buf[0] = '\0';
 442 }
 443
 444 /*
 445  * Print message specified by @format and args.
 446  * Automatically manage buffer space and transparently handle
 447  * buffer overruns.
 448  *
 449  * Returns number of bytes that should have been printed.
 450  */
 451 int
 452 bprintf(struct buf_pr *b, char *format, ...)
 453 {
 454         va_list args;
 455         int i;
 456
 457         va_start(args, format);
 458
 459         i = vsnprintf(b->ptr, b->avail, format, args);
 460         va_end(args);
 461
 462         if (i > b->avail || i < 0) {
 463                 /* Overflow or print error */
 464                 b->avail = 0;
 465         } else {
 466                 b->ptr += i;
 467                 b->avail -= i;
 468         }
 469
 470         b->needed += i;
 471
 472         return (i);
 473 }
 474
 475 /*
 476  * Special values printer for tablearg-aware opcodes.
 477  */
 478 void
 479 bprint_uint_arg(struct buf_pr *bp, const char *str, uint32_t arg)
 480 {
 481
 482         if (str != NULL)
 483                 bprintf(bp, "%s", str);
 484         if (arg == IP_FW_TARG)
 485                 bprintf(bp, "tablearg");
 486         else
 487                 bprintf(bp, "%u", arg);
 488 }
 489
 490 /*
 491  * Helper routine to print a possibly unaligned uint64_t on
 492  * various platform. If width > 0, print the value with
 493  * the desired width, followed by a space;
 494  * otherwise, return the required width.
 495  */
 496 int
 497 pr_u64(struct buf_pr *b, uint64_t *pd, int width)
 498 {
 499 #ifdef TCC
 500 #define U64_FMT "I64"
 501 #else
 502 #define U64_FMT "llu"
 503 #endif
 504         uint64_t u;
 505         unsigned long long d;
 506
 507         bcopy (pd, &u, sizeof(u));
 508         d = u;
 509         return (width > 0) ?
 510                 bprintf(b, "%*" U64_FMT " ", width, d) :
 511                 snprintf(NULL, 0, "%" U64_FMT, d) ;
 512 #undef U64_FMT
 513 }
 514
 515
 516 void *
 517 safe_calloc(size_t number, size_t size)
 518 {
 519         void *ret = calloc(number, size);
 520
 521         if (ret == NULL)
 522                 err(EX_OSERR, "calloc");
 523         return ret;
 524 }
 525
 526 void *
 527 safe_realloc(void *ptr, size_t size)
 528 {
 529         void *ret = realloc(ptr, size);
 530
 531         if (ret == NULL)
 532                 err(EX_OSERR, "realloc");
 533         return ret;
 534 }
 535
 536 /*
 537  * Compare things like interface or table names.
 538  */
 539 int
 540 stringnum_cmp(const char *a, const char *b)
 541 {
 542         int la, lb;
 543
 544         la = strlen(a);
 545         lb = strlen(b);
 546
 547         if (la > lb)
 548                 return (1);
 549         else if (la < lb)
 550                 return (-01);
 551
 552         return (strcmp(a, b));
 553 }
 554
 555
 556 /*
 557  * conditionally runs the command.
 558  * Selected options or negative -> getsockopt
 559  */
 560 int
 561 do_cmd(int optname, void *optval, uintptr_t optlen)
 562 {
 563         int i;
 564
 565         if (co.test_only)
 566                 return 0;
 567
 568         if (ipfw_socket == -1)
 569                 ipfw_socket = socket(AF_INET, SOCK_RAW, IPPROTO_RAW);
 570         if (ipfw_socket < 0)
 571                 err(EX_UNAVAILABLE, "socket");
 572
 573         if (optname == IP_FW_GET || optname == IP_DUMMYNET_GET ||
 574             optname == IP_FW_ADD || optname == IP_FW3 ||
 575             optname == IP_FW_NAT_GET_CONFIG ||
 576             optname < 0 ||
 577             optname == IP_FW_NAT_GET_LOG) {
 578                 if (optname < 0)
 579                         optname = -optname;
 580                 i = getsockopt(ipfw_socket, IPPROTO_IP, optname, optval,
 581                         (socklen_t *)optlen);
 582         } else {
 583                 i = setsockopt(ipfw_socket, IPPROTO_IP, optname, optval, optlen);
 584         }
 585         return i;
 586 }
 587
 588 /*
 589  * do_set3 - pass ipfw control cmd to kernel
 590  * @optname: option name
 591  * @optval: pointer to option data
 592  * @optlen: option length
 593  *
 594  * Assumes op3 header is already embedded.
 595  * Calls setsockopt() with IP_FW3 as kernel-visible opcode.
 596  * Returns 0 on success or errno otherwise.
 597  */
 598 int
 599 do_set3(int optname, ip_fw3_opheader *op3, size_t optlen)
 600 {
 601
 602         if (co.test_only)
 603                 return (0);
 604
 605         if (ipfw_socket == -1)
 606                 ipfw_socket = socket(AF_INET, SOCK_RAW, IPPROTO_RAW);
 607         if (ipfw_socket < 0)
 608                 err(EX_UNAVAILABLE, "socket");
 609
 610         op3->opcode = optname;
 611
 612         return (setsockopt(ipfw_socket, IPPROTO_IP, IP_FW3, op3, optlen));
 613 }
 614
 615 /*
 616  * do_get3 - pass ipfw control cmd to kernel
 617  * @optname: option name
 618  * @optval: pointer to option data
 619  * @optlen: pointer to option length
 620  *
 621  * Assumes op3 header is already embedded.
 622  * Calls getsockopt() with IP_FW3 as kernel-visible opcode.
 623  * Returns 0 on success or errno otherwise.
 624  */
 625 int
 626 do_get3(int optname, ip_fw3_opheader *op3, size_t *optlen)
 627 {
 628         int error;
 629         socklen_t len;
 630
 631         if (co.test_only)
 632                 return (0);
 633
 634         if (ipfw_socket == -1)
 635                 ipfw_socket = socket(AF_INET, SOCK_RAW, IPPROTO_RAW);
 636         if (ipfw_socket < 0)
 637                 err(EX_UNAVAILABLE, "socket");
 638
 639         op3->opcode = optname;
 640
 641         len = *optlen;
 642         error = getsockopt(ipfw_socket, IPPROTO_IP, IP_FW3, op3, &len);
 643         *optlen = len;
 644
 645         return (error);
 646 }
 647
 648 /**
 649  * match_token takes a table and a string, returns the value associated
 650  * with the string (-1 in case of failure).
 651  */
 652 int
 653 match_token(struct _s_x *table, const char *string)
 654 {
 655         struct _s_x *pt;
 656         uint i = strlen(string);
 657
 658         for (pt = table ; i && pt->s != NULL ; pt++)
 659                 if (strlen(pt->s) == i && !bcmp(string, pt->s, i))
 660                         return pt->x;
 661         return (-1);
 662 }
 663
 664 /**
 665  * match_token_relaxed takes a table and a string, returns the value associated
 666  * with the string for the best match.
 667  *
 668  * Returns:
 669  * value from @table for matched records
 670  * -1 for non-matched records
 671  * -2 if more than one records match @string.
 672  */
 673 int
 674 match_token_relaxed(struct _s_x *table, const char *string)
 675 {
 676         struct _s_x *pt, *m;
 677         int i, c;
 678
 679         i = strlen(string);
 680         c = 0;
 681
 682         for (pt = table ; i != 0 && pt->s != NULL ; pt++) {
 683                 if (strncmp(pt->s, string, i) != 0)
 684                         continue;
 685                 m = pt;
 686                 c++;
 687         }
 688
 689         if (c == 1)
 690                 return (m->x);
 691
 692         return (c > 0 ? -2: -1);
 693 }
 694
 695 int
 696 get_token(struct _s_x *table, const char *string, const char *errbase)
 697 {
 698         int tcmd;
 699
 700         if ((tcmd = match_token_relaxed(table, string)) < 0)
 701                 errx(EX_USAGE, "%s %s %s",
 702                     (tcmd == 0) ? "invalid" : "ambiguous", errbase, string);
 703
 704         return (tcmd);
 705 }
 706
 707 /**
 708  * match_value takes a table and a value, returns the string associated
 709  * with the value (NULL in case of failure).
 710  */
 711 char const *
 712 match_value(struct _s_x *p, int value)
 713 {
 714         for (; p->s != NULL; p++)
 715                 if (p->x == value)
 716                         return p->s;
 717         return NULL;
 718 }
 719
 720 size_t
 721 concat_tokens(char *buf, size_t bufsize, struct _s_x *table, char *delimiter)
 722 {
 723         struct _s_x *pt;
 724         int l;
 725         size_t sz;
 726
 727         for (sz = 0, pt = table ; pt->s != NULL; pt++) {
 728                 l = snprintf(buf + sz, bufsize - sz, "%s%s",
 729                     (sz == 0) ? "" : delimiter, pt->s);
 730                 sz += l;
 731                 bufsize += l;
 732                 if (sz > bufsize)
 733                         return (bufsize);
 734         }
 735
 736         return (sz);
 737 }
 738
 739 /*
 740  * helper function to process a set of flags and set bits in the
 741  * appropriate masks.
 742  */
 743 int
 744 fill_flags(struct _s_x *flags, char *p, char **e, uint32_t *set,
 745     uint32_t *clear)
 746 {
 747         char *q;        /* points to the separator */
 748         int val;
 749         uint32_t *which;        /* mask we are working on */
 750
 751         while (p && *p) {
 752                 if (*p == '!') {
 753                         p++;
 754                         which = clear;
 755                 } else
 756                         which = set;
 757                 q = strchr(p, ',');
 758                 if (q)
 759                         *q++ = '\0';
 760                 val = match_token(flags, p);
 761                 if (val <= 0) {
 762                         if (e != NULL)
 763                                 *e = p;
 764                         return (-1);
 765                 }
 766                 *which |= (uint32_t)val;
 767                 p = q;
 768         }
 769         return (0);
 770 }
 771
 772 void
 773 print_flags_buffer(char *buf, size_t sz, struct _s_x *list, uint32_t set)
 774 {
 775         char const *comma = "";
 776         int i, l;
 777
 778         for (i = 0; list[i].x != 0; i++) {
 779                 if ((set & list[i].x) == 0)
 780                         continue;
 781
 782                 set &= ~list[i].x;
 783                 l = snprintf(buf, sz, "%s%s", comma, list[i].s);
 784                 if (l >= sz)
 785                         return;
 786                 comma = ",";
 787                 buf += l;
 788                 sz -=l;
 789         }
 790 }
 791
 792 /*
 793  * _substrcmp takes two strings and returns 1 if they do not match,
 794  * and 0 if they match exactly or the first string is a sub-string
 795  * of the second.  A warning is printed to stderr in the case that the
 796  * first string is a sub-string of the second.
 797  *
 798  * This function will be removed in the future through the usual
 799  * deprecation process.
 800  */
 801 int
 802 _substrcmp(const char *str1, const char* str2)
 803 {
 804
 805         if (strncmp(str1, str2, strlen(str1)) != 0)
 806                 return 1;
 807
 808         if (strlen(str1) != strlen(str2))
 809                 warnx("DEPRECATED: '%s' matched '%s' as a sub-string",
 810                     str1, str2);
 811         return 0;
 812 }
 813
 814 /*
 815  * _substrcmp2 takes three strings and returns 1 if the first two do not match,
 816  * and 0 if they match exactly or the second string is a sub-string
 817  * of the first.  A warning is printed to stderr in the case that the
 818  * first string does not match the third.
 819  *
 820  * This function exists to warn about the bizarre construction
 821  * strncmp(str, "by", 2) which is used to allow people to use a shortcut
 822  * for "bytes".  The problem is that in addition to accepting "by",
 823  * "byt", "byte", and "bytes", it also excepts "by_rabid_dogs" and any
 824  * other string beginning with "by".
 825  *
 826  * This function will be removed in the future through the usual
 827  * deprecation process.
 828  */
 829 int
 830 _substrcmp2(const char *str1, const char* str2, const char* str3)
 831 {
 832
 833         if (strncmp(str1, str2, strlen(str2)) != 0)
 834                 return 1;
 835
 836         if (strcmp(str1, str3) != 0)
 837                 warnx("DEPRECATED: '%s' matched '%s'",
 838                     str1, str3);
 839         return 0;
 840 }
 841
 842 /*
 843  * prints one port, symbolic or numeric
 844  */
 845 static void
 846 print_port(struct buf_pr *bp, int proto, uint16_t port)
 847 {
 848
 849         if (proto == IPPROTO_ETHERTYPE) {
 850                 char const *s;
 851
 852                 if (co.do_resolv && (s = match_value(ether_types, port)) )
 853                         bprintf(bp, "%s", s);
 854                 else
 855                         bprintf(bp, "0x%04x", port);
 856         } else {
 857                 struct servent *se = NULL;
 858                 if (co.do_resolv) {
 859                         struct protoent *pe = getprotobynumber(proto);
 860
 861                         se = getservbyport(htons(port), pe ? pe->p_name : NULL);
 862                 }
 863                 if (se)
 864                         bprintf(bp, "%s", se->s_name);
 865                 else
 866                         bprintf(bp, "%d", port);
 867         }
 868 }
 869
 870 static struct _s_x _port_name[] = {
 871         {"dst-port",    O_IP_DSTPORT},
 872         {"src-port",    O_IP_SRCPORT},
 873         {"ipid",        O_IPID},
 874         {"iplen",       O_IPLEN},
 875         {"ipttl",       O_IPTTL},
 876         {"mac-type",    O_MAC_TYPE},
 877         {"tcpdatalen",  O_TCPDATALEN},
 878         {"tcpwin",      O_TCPWIN},
 879         {"tagged",      O_TAGGED},
 880         {NULL,          0}
 881 };
 882
 883 /*
 884  * Print the values in a list 16-bit items of the types above.
 885  * XXX todo: add support for mask.
 886  */
 887 static void
 888 print_newports(struct buf_pr *bp, ipfw_insn_u16 *cmd, int proto, int opcode)
 889 {
 890         uint16_t *p = cmd->ports;
 891         int i;
 892         char const *sep;
 893
 894         if (opcode != 0) {
 895                 sep = match_value(_port_name, opcode);
 896                 if (sep == NULL)
 897                         sep = "???";
 898                 bprintf(bp, " %s", sep);
 899         }
 900         sep = " ";
 901         for (i = F_LEN((ipfw_insn *)cmd) - 1; i > 0; i--, p += 2) {
 902                 bprintf(bp, "%s", sep);
 903                 print_port(bp, proto, p[0]);
 904                 if (p[0] != p[1]) {
 905                         bprintf(bp, "-");
 906                         print_port(bp, proto, p[1]);
 907                 }
 908                 sep = ",";
 909         }
 910 }
 911
 912 /*
 913  * Like strtol, but also translates service names into port numbers
 914  * for some protocols.
 915  * In particular:
 916  *      proto == -1 disables the protocol check;
 917  *      proto == IPPROTO_ETHERTYPE looks up an internal table
 918  *      proto == <some value in /etc/protocols> matches the values there.
 919  * Returns *end == s in case the parameter is not found.
 920  */
 921 static int
 922 strtoport(char *s, char **end, int base, int proto)
 923 {
 924         char *p, *buf;
 925         char *s1;
 926         int i;
 927
 928         *end = s;               /* default - not found */
 929         if (*s == '\0')
 930                 return 0;       /* not found */
 931
 932         if (isdigit(*s))
 933                 return strtol(s, end, base);
 934
 935         /*
 936          * find separator. '\\' escapes the next char.
 937          */
 938         for (s1 = s; *s1 && (isalnum(*s1) || *s1 == '\\') ; s1++)
 939                 if (*s1 == '\\' && s1[1] != '\0')
 940                         s1++;
 941
 942         buf = safe_calloc(s1 - s + 1, 1);
 943
 944         /*
 945          * copy into a buffer skipping backslashes
 946          */
 947         for (p = s, i = 0; p != s1 ; p++)
 948                 if (*p != '\\')
 949                         buf[i++] = *p;
 950         buf[i++] = '\0';
 951
 952         if (proto == IPPROTO_ETHERTYPE) {
 953                 i = match_token(ether_types, buf);
 954                 free(buf);
 955                 if (i != -1) {  /* found */
 956                         *end = s1;
 957                         return i;
 958                 }
 959         } else {
 960                 struct protoent *pe = NULL;
 961                 struct servent *se;
 962
 963                 if (proto != 0)
 964                         pe = getprotobynumber(proto);
 965                 setservent(1);
 966                 se = getservbyname(buf, pe ? pe->p_name : NULL);
 967                 free(buf);
 968                 if (se != NULL) {
 969                         *end = s1;
 970                         return ntohs(se->s_port);
 971                 }
 972         }
 973         return 0;       /* not found */
 974 }
 975
 976 /*
 977  * Fill the body of the command with the list of port ranges.
 978  */
 979 static int
 980 fill_newports(ipfw_insn_u16 *cmd, char *av, int proto, int cblen)
 981 {
 982         uint16_t a, b, *p = cmd->ports;
 983         int i = 0;
 984         char *s = av;
 985
 986         while (*s) {
 987                 a = strtoport(av, &s, 0, proto);
 988                 if (s == av)                    /* empty or invalid argument */
 989                         return (0);
 990
 991                 CHECK_LENGTH(cblen, i + 2);
 992
 993                 switch (*s) {
 994                 case '-':                       /* a range */
 995                         av = s + 1;
 996                         b = strtoport(av, &s, 0, proto);
 997                         /* Reject expressions like '1-abc' or '1-2-3'. */
 998                         if (s == av || (*s != ',' && *s != '\0'))
 999                                 return (0);
1000                         p[0] = a;
1001                         p[1] = b;
1002                         break;
1003                 case ',':                       /* comma separated list */
1004                 case '\0':
1005                         p[0] = p[1] = a;
1006                         break;
1007                 default:
1008                         warnx("port list: invalid separator <%c> in <%s>",
1009                                 *s, av);
1010                         return (0);
1011                 }
1012
1013                 i++;
1014                 p += 2;
1015                 av = s + 1;
1016         }
1017         if (i > 0) {
1018                 if (i + 1 > F_LEN_MASK)
1019                         errx(EX_DATAERR, "too many ports/ranges\n");
1020                 cmd->o.len |= i + 1;    /* leave F_NOT and F_OR untouched */
1021         }
1022         return (i);
1023 }
1024
1025 /*
1026  * Fill the body of the command with the list of DiffServ codepoints.
1027  */
1028 static void
1029 fill_dscp(ipfw_insn *cmd, char *av, int cblen)
1030 {
1031         uint32_t *low, *high;
1032         char *s = av, *a;
1033         int code;
1034
1035         cmd->opcode = O_DSCP;
1036         cmd->len |= F_INSN_SIZE(ipfw_insn_u32) + 1;
1037
1038         CHECK_CMDLEN;
1039
1040         low = (uint32_t *)(cmd + 1);
1041         high = low + 1;
1042
1043         *low = 0;
1044         *high = 0;
1045
1046         while (s != NULL) {
1047                 a = strchr(s, ',');
1048
1049                 if (a != NULL)
1050                         *a++ = '\0';
1051
1052                 if (isalpha(*s)) {
1053                         if ((code = match_token(f_ipdscp, s)) == -1)
1054                                 errx(EX_DATAERR, "Unknown DSCP code");
1055                 } else {
1056                         code = strtoul(s, NULL, 10);
1057                         if (code < 0 || code > 63)
1058                                 errx(EX_DATAERR, "Invalid DSCP value");
1059                 }
1060
1061                 if (code >= 32)
1062                         *high |= 1 << (code - 32);
1063                 else
1064                         *low |= 1 << code;
1065
1066                 s = a;
1067         }
1068 }
1069
1070 static struct _s_x icmpcodes[] = {
1071       { "net",                  ICMP_UNREACH_NET },
1072       { "host",                 ICMP_UNREACH_HOST },
1073       { "protocol",             ICMP_UNREACH_PROTOCOL },
1074       { "port",                 ICMP_UNREACH_PORT },
1075       { "needfrag",             ICMP_UNREACH_NEEDFRAG },
1076       { "srcfail",              ICMP_UNREACH_SRCFAIL },
1077       { "net-unknown",          ICMP_UNREACH_NET_UNKNOWN },
1078       { "host-unknown",         ICMP_UNREACH_HOST_UNKNOWN },
1079       { "isolated",             ICMP_UNREACH_ISOLATED },
1080       { "net-prohib",           ICMP_UNREACH_NET_PROHIB },
1081       { "host-prohib",          ICMP_UNREACH_HOST_PROHIB },
1082       { "tosnet",               ICMP_UNREACH_TOSNET },
1083       { "toshost",              ICMP_UNREACH_TOSHOST },
1084       { "filter-prohib",        ICMP_UNREACH_FILTER_PROHIB },
1085       { "host-precedence",      ICMP_UNREACH_HOST_PRECEDENCE },
1086       { "precedence-cutoff",    ICMP_UNREACH_PRECEDENCE_CUTOFF },
1087       { NULL, 0 }
1088 };
1089
1090 static void
1091 fill_reject_code(u_short *codep, char *str)
1092 {
1093         int val;
1094         char *s;
1095
1096         val = strtoul(str, &s, 0);
1097         if (s == str || *s != '\0' || val >= 0x100)
1098                 val = match_token(icmpcodes, str);
1099         if (val < 0)
1100                 errx(EX_DATAERR, "unknown ICMP unreachable code ``%s''", str);
1101         *codep = val;
1102         return;
1103 }
1104
1105 static void
1106 print_reject_code(struct buf_pr *bp, uint16_t code)
1107 {
1108         char const *s;
1109
1110         if ((s = match_value(icmpcodes, code)) != NULL)
1111                 bprintf(bp, "unreach %s", s);
1112         else
1113                 bprintf(bp, "unreach %u", code);
1114 }
1115
1116 /*
1117  * Returns the number of bits set (from left) in a contiguous bitmask,
1118  * or -1 if the mask is not contiguous.
1119  * XXX this needs a proper fix.
1120  * This effectively works on masks in big-endian (network) format.
1121  * when compiled on little endian architectures.
1122  *
1123  * First bit is bit 7 of the first byte -- note, for MAC addresses,
1124  * the first bit on the wire is bit 0 of the first byte.
1125  * len is the max length in bits.
1126  */
1127 int
1128 contigmask(uint8_t *p, int len)
1129 {
1130         int i, n;
1131
1132         for (i=0; i<len ; i++)
1133                 if ( (p[i/8] & (1 << (7 - (i%8)))) == 0) /* first bit unset */
1134                         break;
1135         for (n=i+1; n < len; n++)
1136                 if ( (p[n/8] & (1 << (7 - (n%8)))) != 0)
1137                         return -1; /* mask not contiguous */
1138         return i;
1139 }
1140
1141 /*
1142  * print flags set/clear in the two bitmasks passed as parameters.
1143  * There is a specialized check for f_tcpflags.
1144  */
1145 static void
1146 print_flags(struct buf_pr *bp, char const *name, ipfw_insn *cmd,
1147     struct _s_x *list)
1148 {
1149         char const *comma = "";
1150         int i;
1151         uint8_t set = cmd->arg1 & 0xff;
1152         uint8_t clear = (cmd->arg1 >> 8) & 0xff;
1153
1154         if (list == f_tcpflags && set == TH_SYN && clear == TH_ACK) {
1155                 bprintf(bp, " setup");
1156                 return;
1157         }
1158
1159         bprintf(bp, " %s ", name);
1160         for (i=0; list[i].x != 0; i++) {
1161                 if (set & list[i].x) {
1162                         set &= ~list[i].x;
1163                         bprintf(bp, "%s%s", comma, list[i].s);
1164                         comma = ",";
1165                 }
1166                 if (clear & list[i].x) {
1167                         clear &= ~list[i].x;
1168                         bprintf(bp, "%s!%s", comma, list[i].s);
1169                         comma = ",";
1170                 }
1171         }
1172 }
1173
1174
1175 /*
1176  * Print the ip address contained in a command.
1177  */
1178 static void
1179 print_ip(struct buf_pr *bp, const struct format_opts *fo, ipfw_insn_ip *cmd)
1180 {
1181         struct hostent *he = NULL;
1182         struct in_addr *ia;
1183         uint32_t len = F_LEN((ipfw_insn *)cmd);
1184         uint32_t *a = ((ipfw_insn_u32 *)cmd)->d;
1185         char *t;
1186
1187         bprintf(bp, " ");
1188         if (cmd->o.opcode == O_IP_DST_LOOKUP && len > F_INSN_SIZE(ipfw_insn_u32)) {
1189                 uint32_t d = a[1];
1190                 const char *arg = "<invalid>";
1191
1192                 if (d < sizeof(lookup_key)/sizeof(lookup_key[0]))
1193                         arg = match_value(rule_options, lookup_key[d]);
1194                 t = table_search_ctlv(fo->tstate, ((ipfw_insn *)cmd)->arg1);
1195                 bprintf(bp, "lookup %s %s", arg, t);
1196                 return;
1197         }
1198         if (cmd->o.opcode == O_IP_SRC_ME || cmd->o.opcode == O_IP_DST_ME) {
1199                 bprintf(bp, "me");
1200                 return;
1201         }
1202         if (cmd->o.opcode == O_IP_SRC_LOOKUP ||
1203             cmd->o.opcode == O_IP_DST_LOOKUP) {
1204                 t = table_search_ctlv(fo->tstate, ((ipfw_insn *)cmd)->arg1);
1205                 bprintf(bp, "table(%s", t);
1206                 if (len == F_INSN_SIZE(ipfw_insn_u32))
1207                         bprintf(bp, ",%u", *a);
1208                 bprintf(bp, ")");
1209                 return;
1210         }
1211         if (cmd->o.opcode == O_IP_SRC_SET || cmd->o.opcode == O_IP_DST_SET) {
1212                 uint32_t x, *map = (uint32_t *)&(cmd->mask);
1213                 int i, j;
1214                 char comma = '{';
1215
1216                 x = cmd->o.arg1 - 1;
1217                 x = htonl( ~x );
1218                 cmd->addr.s_addr = htonl(cmd->addr.s_addr);
1219                 bprintf(bp, "%s/%d", inet_ntoa(cmd->addr),
1220                         contigmask((uint8_t *)&x, 32));
1221                 x = cmd->addr.s_addr = htonl(cmd->addr.s_addr);
1222                 x &= 0xff; /* base */
1223                 /*
1224                  * Print bits and ranges.
1225                  * Locate first bit set (i), then locate first bit unset (j).
1226                  * If we have 3+ consecutive bits set, then print them as a
1227                  * range, otherwise only print the initial bit and rescan.
1228                  */
1229                 for (i=0; i < cmd->o.arg1; i++)
1230                         if (map[i/32] & (1<<(i & 31))) {
1231                                 for (j=i+1; j < cmd->o.arg1; j++)
1232                                         if (!(map[ j/32] & (1<<(j & 31))))
1233                                                 break;
1234                                 bprintf(bp, "%c%d", comma, i+x);
1235                                 if (j>i+2) { /* range has at least 3 elements */
1236                                         bprintf(bp, "-%d", j-1+x);
1237                                         i = j-1;
1238                                 }
1239                                 comma = ',';
1240                         }
1241                 bprintf(bp, "}");
1242                 return;
1243         }
1244         /*
1245          * len == 2 indicates a single IP, whereas lists of 1 or more
1246          * addr/mask pairs have len = (2n+1). We convert len to n so we
1247          * use that to count the number of entries.
1248          */
1249     for (len = len / 2; len > 0; len--, a += 2) {
1250         int mb =        /* mask length */
1251             (cmd->o.opcode == O_IP_SRC || cmd->o.opcode == O_IP_DST) ?
1252                 32 : contigmask((uint8_t *)&(a[1]), 32);
1253         if (mb == 32 && co.do_resolv)
1254                 he = gethostbyaddr((char *)&(a[0]), sizeof(u_long), AF_INET);
1255         if (he != NULL)         /* resolved to name */
1256                 bprintf(bp, "%s", he->h_name);
1257         else if (mb == 0)       /* any */
1258                 bprintf(bp, "any");
1259         else {          /* numeric IP followed by some kind of mask */
1260                 ia = (struct in_addr *)&a[0];
1261                 bprintf(bp, "%s", inet_ntoa(*ia));
1262                 if (mb < 0) {
1263                         ia = (struct in_addr *)&a[1];
1264                         bprintf(bp, ":%s", inet_ntoa(*ia));
1265                 } else if (mb < 32)
1266                         bprintf(bp, "/%d", mb);
1267         }
1268         if (len > 1)
1269                 bprintf(bp, ",");
1270     }
1271 }
1272
1273 /*
1274  * prints a MAC address/mask pair
1275  */
1276 static void
1277 format_mac(struct buf_pr *bp, uint8_t *addr, uint8_t *mask)
1278 {
1279         int l = contigmask(mask, 48);
1280
1281         if (l == 0)
1282                 bprintf(bp, " any");
1283         else {
1284                 bprintf(bp, " %02x:%02x:%02x:%02x:%02x:%02x",
1285                     addr[0], addr[1], addr[2], addr[3], addr[4], addr[5]);
1286                 if (l == -1)
1287                         bprintf(bp, "&%02x:%02x:%02x:%02x:%02x:%02x",
1288                             mask[0], mask[1], mask[2],
1289                             mask[3], mask[4], mask[5]);
1290                 else if (l < 48)
1291                         bprintf(bp, "/%d", l);
1292         }
1293 }
1294
1295 static void
1296 print_mac(struct buf_pr *bp, ipfw_insn_mac *mac)
1297 {
1298
1299         bprintf(bp, " MAC");
1300         format_mac(bp, mac->addr, mac->mask);
1301         format_mac(bp, mac->addr + 6, mac->mask + 6);
1302 }
1303
1304 static void
1305 fill_icmptypes(ipfw_insn_u32 *cmd, char *av)
1306 {
1307         uint8_t type;
1308
1309         cmd->d[0] = 0;
1310         while (*av) {
1311                 if (*av == ',')
1312                         av++;
1313
1314                 type = strtoul(av, &av, 0);
1315
1316                 if (*av != ',' && *av != '\0')
1317                         errx(EX_DATAERR, "invalid ICMP type");
1318
1319                 if (type > 31)
1320                         errx(EX_DATAERR, "ICMP type out of range");
1321
1322                 cmd->d[0] |= 1 << type;
1323         }
1324         cmd->o.opcode = O_ICMPTYPE;
1325         cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32);
1326 }
1327
1328 static void
1329 print_icmptypes(struct buf_pr *bp, ipfw_insn_u32 *cmd)
1330 {
1331         int i;
1332         char sep= ' ';
1333
1334         bprintf(bp, " icmptypes");
1335         for (i = 0; i < 32; i++) {
1336                 if ( (cmd->d[0] & (1 << (i))) == 0)
1337                         continue;
1338                 bprintf(bp, "%c%d", sep, i);
1339                 sep = ',';
1340         }
1341 }
1342
1343 static void
1344 print_dscp(struct buf_pr *bp, ipfw_insn_u32 *cmd)
1345 {
1346         int i = 0;
1347         uint32_t *v;
1348         char sep= ' ';
1349         const char *code;
1350
1351         bprintf(bp, " dscp");
1352         v = cmd->d;
1353         while (i < 64) {
1354                 if (*v & (1 << i)) {
1355                         if ((code = match_value(f_ipdscp, i)) != NULL)
1356                                 bprintf(bp, "%c%s", sep, code);
1357                         else
1358                                 bprintf(bp, "%c%d", sep, i);
1359                         sep = ',';
1360                 }
1361
1362                 if ((++i % 32) == 0)
1363                         v++;
1364         }
1365 }
1366
1367 #define insntod(cmd, type)      ((ipfw_insn_ ## type *)(cmd))
1368 struct show_state {
1369         struct ip_fw_rule       *rule;
1370         const ipfw_insn         *eaction;
1371         uint8_t                 *printed;
1372         int                     flags;
1373 #define HAVE_PROTO      0x0001
1374 #define HAVE_SRCIP      0x0002
1375 #define HAVE_DSTIP      0x0004
1376         int                     proto;
1377         int                     or_block;
1378 };
1379
1380 static int
1381 init_show_state(struct show_state *state, struct ip_fw_rule *rule)
1382 {
1383
1384         state->printed = calloc(rule->cmd_len, sizeof(uint8_t));
1385         if (state->printed == NULL)
1386                 return (ENOMEM);
1387         state->rule = rule;
1388         state->eaction = NULL;
1389         state->flags = 0;
1390         state->proto = 0;
1391         state->or_block = 0;
1392         return (0);
1393 }
1394
1395 static void
1396 free_show_state(struct show_state *state)
1397 {
1398
1399         free(state->printed);
1400 }
1401
1402 static uint8_t
1403 is_printed_opcode(struct show_state *state, const ipfw_insn *cmd)
1404 {
1405
1406         return (state->printed[cmd - state->rule->cmd]);
1407 }
1408
1409 static void
1410 mark_printed(struct show_state *state, const ipfw_insn *cmd)
1411 {
1412
1413         state->printed[cmd - state->rule->cmd] = 1;
1414 }
1415
1416 static void
1417 print_limit(struct buf_pr *bp, const ipfw_insn_limit *limit)
1418 {
1419         struct _s_x *p = limit_masks;
1420         char const *comma = " ";
1421         uint8_t x;
1422
1423         bprintf(bp, " limit");
1424         for (x = limit->limit_mask; p->x != 0; p++) {
1425                 if ((x & p->x) == p->x) {
1426                         x &= ~p->x;
1427                         bprintf(bp, "%s%s", comma, p->s);
1428                         comma = ",";
1429                 }
1430         }
1431         bprint_uint_arg(bp, " ", limit->conn_limit);
1432 }
1433
1434 static int
1435 print_instruction(struct buf_pr *bp, const struct format_opts *fo,
1436     struct show_state *state, ipfw_insn *cmd)
1437 {
1438         struct protoent *pe;
1439         struct passwd *pwd;
1440         struct group *grp;
1441         const char *s;
1442         double d;
1443
1444         if (is_printed_opcode(state, cmd))
1445                 return (0);
1446         if ((cmd->len & F_OR) != 0 && state->or_block == 0)
1447                 bprintf(bp, " {");
1448         if (cmd->opcode != O_IN && (cmd->len & F_NOT) != 0)
1449                 bprintf(bp, " not");
1450
1451         switch (cmd->opcode) {
1452         case O_PROB:
1453                 d = 1.0 * insntod(cmd, u32)->d[0] / 0x7fffffff;
1454                 bprintf(bp, "prob %f ", d);
1455                 break;
1456         case O_PROBE_STATE: /* no need to print anything here */
1457                 break;
1458         case O_IP_SRC:
1459         case O_IP_SRC_LOOKUP:
1460         case O_IP_SRC_MASK:
1461         case O_IP_SRC_ME:
1462         case O_IP_SRC_SET:
1463         case O_IP_DST:
1464         case O_IP_DST_LOOKUP:
1465         case O_IP_DST_MASK:
1466         case O_IP_DST_ME:
1467         case O_IP_DST_SET:
1468                 print_ip(bp, fo, insntod(cmd, ip));
1469                 break;
1470         case O_IP6_SRC:
1471         case O_IP6_SRC_MASK:
1472         case O_IP6_SRC_ME:
1473         case O_IP6_DST:
1474         case O_IP6_DST_MASK:
1475         case O_IP6_DST_ME:
1476                 print_ip6(bp, insntod(cmd, ip6));
1477                 break;
1478         case O_FLOW6ID:
1479                 print_flow6id(bp, insntod(cmd, u32));
1480                 break;
1481         case O_IP_DSTPORT:
1482         case O_IP_SRCPORT:
1483                 print_newports(bp, insntod(cmd, u16), state->proto,
1484                     (state->flags & (HAVE_SRCIP | HAVE_DSTIP)) ==
1485                     (HAVE_SRCIP | HAVE_DSTIP) ?  cmd->opcode: 0);
1486                 break;
1487         case O_PROTO:
1488                 pe = getprotobynumber(cmd->arg1);
1489                 if (state->flags & HAVE_PROTO)
1490                         bprintf(bp, " proto");
1491                 if (pe != NULL)
1492                         bprintf(bp, " %s", pe->p_name);
1493                 else
1494                         bprintf(bp, " %u", cmd->arg1);
1495                 break;
1496         case O_MACADDR2:
1497                 print_mac(bp, insntod(cmd, mac));
1498                 break;
1499         case O_MAC_TYPE:
1500                 print_newports(bp, insntod(cmd, u16),
1501                     IPPROTO_ETHERTYPE, cmd->opcode);
1502                 break;
1503         case O_FRAG:
1504                 bprintf(bp, " frag");
1505                 break;
1506         case O_FIB:
1507                 bprintf(bp, " fib %u", cmd->arg1);
1508                 break;
1509         case O_SOCKARG:
1510                 bprintf(bp, " sockarg");
1511                 break;
1512         case O_IN:
1513                 bprintf(bp, cmd->len & F_NOT ? " out" : " in");
1514                 break;
1515         case O_DIVERTED:
1516                 switch (cmd->arg1) {
1517                 case 3:
1518                         bprintf(bp, " diverted");
1519                         break;
1520                 case 2:
1521                         bprintf(bp, " diverted-output");
1522                         break;
1523                 case 1:
1524                         bprintf(bp, " diverted-loopback");
1525                         break;
1526                 default:
1527                         bprintf(bp, " diverted-?<%u>", cmd->arg1);
1528                         break;
1529                 }
1530                 break;
1531         case O_LAYER2:
1532                 bprintf(bp, " layer2");
1533                 break;
1534         case O_XMIT:
1535         case O_RECV:
1536         case O_VIA:
1537                 if (cmd->opcode == O_XMIT)
1538                         s = "xmit";
1539                 else if (cmd->opcode == O_RECV)
1540                         s = "recv";
1541                 else /* if (cmd->opcode == O_VIA) */
1542                         s = "via";
1543                 switch (insntod(cmd, if)->name[0]) {
1544                 case '\0':
1545                         bprintf(bp, " %s %s", s,
1546                             inet_ntoa(insntod(cmd, if)->p.ip));
1547                         break;
1548                 case '\1':
1549                         bprintf(bp, " %s table(%s)", s,
1550                             table_search_ctlv(fo->tstate,
1551                             insntod(cmd, if)->p.kidx));
1552                         break;
1553                 default:
1554                         bprintf(bp, " %s %s", s,
1555                             insntod(cmd, if)->name);
1556                 }
1557                 break;
1558         case O_IP_FLOW_LOOKUP:
1559                 s = table_search_ctlv(fo->tstate, cmd->arg1);
1560                 bprintf(bp, " flow table(%s", s);
1561                 if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_u32))
1562                         bprintf(bp, ",%u", insntod(cmd, u32)->d[0]);
1563                 bprintf(bp, ")");
1564                 break;
1565         case O_IPID:
1566         case O_IPTTL:
1567         case O_IPLEN:
1568         case O_TCPDATALEN:
1569         case O_TCPWIN:
1570                 if (F_LEN(cmd) == 1) {
1571                         switch (cmd->opcode) {
1572                         case O_IPID:
1573                                 s = "ipid";
1574                                 break;
1575                         case O_IPTTL:
1576                                 s = "ipttl";
1577                                 break;
1578                         case O_IPLEN:
1579                                 s = "iplen";
1580                                 break;
1581                         case O_TCPDATALEN:
1582                                 s = "tcpdatalen";
1583                                 break;
1584                         case O_TCPWIN:
1585                                 s = "tcpwin";
1586                                 break;
1587                         }
1588                         bprintf(bp, " %s %u", s, cmd->arg1);
1589                 } else
1590                         print_newports(bp, insntod(cmd, u16), 0,
1591                             cmd->opcode);
1592                 break;
1593         case O_IPVER:
1594                 bprintf(bp, " ipver %u", cmd->arg1);
1595                 break;
1596         case O_IPPRECEDENCE:
1597                 bprintf(bp, " ipprecedence %u", cmd->arg1 >> 5);
1598                 break;
1599         case O_DSCP:
1600                 print_dscp(bp, insntod(cmd, u32));
1601                 break;
1602         case O_IPOPT:
1603                 print_flags(bp, "ipoptions", cmd, f_ipopts);
1604                 break;
1605         case O_IPTOS:
1606                 print_flags(bp, "iptos", cmd, f_iptos);
1607                 break;
1608         case O_ICMPTYPE:
1609                 print_icmptypes(bp, insntod(cmd, u32));
1610                 break;
1611         case O_ESTAB:
1612                 bprintf(bp, " established");
1613                 break;
1614         case O_TCPFLAGS:
1615                 print_flags(bp, "tcpflags", cmd, f_tcpflags);
1616                 break;
1617         case O_TCPOPTS:
1618                 print_flags(bp, "tcpoptions", cmd, f_tcpopts);
1619                 break;
1620         case O_TCPACK:
1621                 bprintf(bp, " tcpack %d",
1622                     ntohl(insntod(cmd, u32)->d[0]));
1623                 break;
1624         case O_TCPSEQ:
1625                 bprintf(bp, " tcpseq %d",
1626                     ntohl(insntod(cmd, u32)->d[0]));
1627                 break;
1628         case O_UID:
1629                 pwd = getpwuid(insntod(cmd, u32)->d[0]);
1630                 if (pwd != NULL)
1631                         bprintf(bp, " uid %s", pwd->pw_name);
1632                 else
1633                         bprintf(bp, " uid %u",
1634                             insntod(cmd, u32)->d[0]);
1635                 break;
1636         case O_GID:
1637                 grp = getgrgid(insntod(cmd, u32)->d[0]);
1638                 if (grp != NULL)
1639                         bprintf(bp, " gid %s", grp->gr_name);
1640                 else
1641                         bprintf(bp, " gid %u",
1642                             insntod(cmd, u32)->d[0]);
1643                 break;
1644         case O_JAIL:
1645                 bprintf(bp, " jail %d", insntod(cmd, u32)->d[0]);
1646                 break;
1647         case O_VERREVPATH:
1648                 bprintf(bp, " verrevpath");
1649                 break;
1650         case O_VERSRCREACH:
1651                 bprintf(bp, " versrcreach");
1652                 break;
1653         case O_ANTISPOOF:
1654                 bprintf(bp, " antispoof");
1655                 break;
1656         case O_IPSEC:
1657                 bprintf(bp, " ipsec");
1658                 break;
1659         case O_NOP:
1660                 bprintf(bp, " // %s", (char *)(cmd + 1));
1661                 break;
1662         case O_KEEP_STATE:
1663                 bprintf(bp, " keep-state");
1664                 bprintf(bp, " :%s",
1665                     object_search_ctlv(fo->tstate, cmd->arg1,
1666                     IPFW_TLV_STATE_NAME));
1667                 break;
1668         case O_LIMIT:
1669                 print_limit(bp, insntod(cmd, limit));
1670                 bprintf(bp, " :%s",
1671                     object_search_ctlv(fo->tstate, cmd->arg1,
1672                     IPFW_TLV_STATE_NAME));
1673                 break;
1674         case O_IP6:
1675                 bprintf(bp, " ip6");
1676                 break;
1677         case O_IP4:
1678                 bprintf(bp, " ip4");
1679                 break;
1680         case O_ICMP6TYPE:
1681                 print_icmp6types(bp, insntod(cmd, u32));
1682                 break;
1683         case O_EXT_HDR:
1684                 print_ext6hdr(bp, cmd);
1685                 break;
1686         case O_TAGGED:
1687                 if (F_LEN(cmd) == 1)
1688                         bprint_uint_arg(bp, " tagged ", cmd->arg1);
1689                 else
1690                         print_newports(bp, insntod(cmd, u16),
1691                                     0, O_TAGGED);
1692                 break;
1693         default:
1694                 bprintf(bp, " [opcode %d len %d]", cmd->opcode,
1695                     cmd->len);
1696         }
1697         if (cmd->len & F_OR) {
1698                 bprintf(bp, " or");
1699                 state->or_block = 1;
1700         } else if (state->or_block != 0) {
1701                 bprintf(bp, " }");
1702                 state->or_block = 0;
1703         }
1704         mark_printed(state, cmd);
1705
1706         return (1);
1707 }
1708
1709 static ipfw_insn *
1710 print_opcode(struct buf_pr *bp, struct format_opts *fo,
1711     struct show_state *state, uint8_t opcode)
1712 {
1713         ipfw_insn *cmd;
1714         int l;
1715
1716         for (l = state->rule->act_ofs, cmd = state->rule->cmd;
1717             l > 0; l -= F_LEN(cmd), cmd += F_LEN(cmd)) {
1718                 /* We use zero opcode to print the rest of options */
1719                 if (opcode != 0 && cmd->opcode != opcode)
1720                         continue;
1721                 /*
1722                  * Skip O_NOP, when we printing the rest
1723                  * of options, it will be handled separately.
1724                  */
1725                 if (cmd->opcode == O_NOP && opcode != O_NOP)
1726                         continue;
1727                 if (!print_instruction(bp, fo, state, cmd))
1728                         continue;
1729                 return (cmd);
1730         }
1731         return (NULL);
1732 }
1733
1734 static void
1735 print_fwd(struct buf_pr *bp, const ipfw_insn *cmd)
1736 {
1737         char buf[INET6_ADDRSTRLEN + IF_NAMESIZE + 2];
1738         ipfw_insn_sa6 *sa6;
1739         ipfw_insn_sa *sa;
1740         uint16_t port;
1741
1742         if (cmd->opcode == O_FORWARD_IP) {
1743                 sa = insntod(cmd, sa);
1744                 port = sa->sa.sin_port;
1745                 if (sa->sa.sin_addr.s_addr == INADDR_ANY)
1746                         bprintf(bp, "fwd tablearg");
1747                 else
1748                         bprintf(bp, "fwd %s", inet_ntoa(sa->sa.sin_addr));
1749         } else {
1750                 sa6 = insntod(cmd, sa6);
1751                 port = sa6->sa.sin6_port;
1752                 bprintf(bp, "fwd ");
1753                 if (getnameinfo((const struct sockaddr *)&sa6->sa,
1754                     sizeof(struct sockaddr_in6), buf, sizeof(buf), NULL, 0,
1755                     NI_NUMERICHOST) == 0)
1756                         bprintf(bp, "%s", buf);
1757         }
1758         if (port != 0)
1759                 bprintf(bp, ",%u", port);
1760 }
1761
1762 static int
1763 print_action_instruction(struct buf_pr *bp, const struct format_opts *fo,
1764     struct show_state *state, const ipfw_insn *cmd)
1765 {
1766         const char *s;
1767
1768         if (is_printed_opcode(state, cmd))
1769                 return (0);
1770         switch (cmd->opcode) {
1771         case O_CHECK_STATE:
1772                 bprintf(bp, "check-state");
1773                 if (cmd->arg1 != 0)
1774                         s = object_search_ctlv(fo->tstate, cmd->arg1,
1775                             IPFW_TLV_STATE_NAME);
1776                 else
1777                         s = NULL;
1778                 bprintf(bp, " :%s", s ? s: "any");
1779                 break;
1780         case O_ACCEPT:
1781                 bprintf(bp, "allow");
1782                 break;
1783         case O_COUNT:
1784                 bprintf(bp, "count");
1785                 break;
1786         case O_DENY:
1787                 bprintf(bp, "deny");
1788                 break;
1789         case O_REJECT:
1790                 if (cmd->arg1 == ICMP_REJECT_RST)
1791                         bprintf(bp, "reset");
1792                 else if (cmd->arg1 == ICMP_REJECT_ABORT)
1793                         bprintf(bp, "abort");
1794                 else if (cmd->arg1 == ICMP_UNREACH_HOST)
1795                         bprintf(bp, "reject");
1796                 else
1797                         print_reject_code(bp, cmd->arg1);
1798                 break;
1799         case O_UNREACH6:
1800                 if (cmd->arg1 == ICMP6_UNREACH_RST)
1801                         bprintf(bp, "reset6");
1802                 else if (cmd->arg1 == ICMP6_UNREACH_ABORT)
1803                         bprintf(bp, "abort6");
1804                 else
1805                         print_unreach6_code(bp, cmd->arg1);
1806                 break;
1807         case O_SKIPTO:
1808                 bprint_uint_arg(bp, "skipto ", cmd->arg1);
1809                 break;
1810         case O_PIPE:
1811                 bprint_uint_arg(bp, "pipe ", cmd->arg1);
1812                 break;
1813         case O_QUEUE:
1814                 bprint_uint_arg(bp, "queue ", cmd->arg1);
1815                 break;
1816         case O_DIVERT:
1817                 bprint_uint_arg(bp, "divert ", cmd->arg1);
1818                 break;
1819         case O_TEE:
1820                 bprint_uint_arg(bp, "tee ", cmd->arg1);
1821                 break;
1822         case O_NETGRAPH:
1823                 bprint_uint_arg(bp, "netgraph ", cmd->arg1);
1824                 break;
1825         case O_NGTEE:
1826                 bprint_uint_arg(bp, "ngtee ", cmd->arg1);
1827                 break;
1828         case O_FORWARD_IP:
1829         case O_FORWARD_IP6:
1830                 print_fwd(bp, cmd);
1831                 break;
1832         case O_LOG:
1833                 if (insntod(cmd, log)->max_log > 0)
1834                         bprintf(bp, " log logamount %d",
1835                             insntod(cmd, log)->max_log);
1836                 else
1837                         bprintf(bp, " log");
1838                 break;
1839         case O_ALTQ:
1840 #ifndef NO_ALTQ
1841                 print_altq_cmd(bp, insntod(cmd, altq));
1842 #endif
1843                 break;
1844         case O_TAG:
1845                 bprint_uint_arg(bp, cmd->len & F_NOT ? " untag ":
1846                     " tag ", cmd->arg1);
1847                 break;
1848         case O_NAT:
1849                 if (cmd->arg1 != IP_FW_NAT44_GLOBAL)
1850                         bprint_uint_arg(bp, "nat ", cmd->arg1);
1851                 else
1852                         bprintf(bp, "nat global");
1853                 break;
1854         case O_SETFIB:
1855                 if (cmd->arg1 == IP_FW_TARG)
1856                         bprint_uint_arg(bp, "setfib ", cmd->arg1);
1857                 else
1858                         bprintf(bp, "setfib %u", cmd->arg1 & 0x7FFF);
1859                 break;
1860         case O_EXTERNAL_ACTION:
1861                 /*
1862                  * The external action can consists of two following
1863                  * each other opcodes - O_EXTERNAL_ACTION and
1864                  * O_EXTERNAL_INSTANCE. The first contains the ID of
1865                  * name of external action. The second contains the ID
1866                  * of name of external action instance.
1867                  * NOTE: in case when external action has no named
1868                  * instances support, the second opcode isn't needed.
1869                  */
1870                 state->eaction = cmd;
1871                 s = object_search_ctlv(fo->tstate, cmd->arg1,
1872                     IPFW_TLV_EACTION);
1873                 if (match_token(rule_eactions, s) != -1)
1874                         bprintf(bp, "%s", s);
1875                 else
1876                         bprintf(bp, "eaction %s", s);
1877                 break;
1878         case O_EXTERNAL_INSTANCE:
1879                 if (state->eaction == NULL)
1880                         break;
1881                 /*
1882                  * XXX: we need to teach ipfw(9) to rewrite opcodes
1883                  * in the user buffer on rule addition. When we add
1884                  * the rule, we specify zero TLV type for
1885                  * O_EXTERNAL_INSTANCE object. To show correct
1886                  * rule after `ipfw add` we need to search instance
1887                  * name with zero type. But when we do `ipfw show`
1888                  * we calculate TLV type using IPFW_TLV_EACTION_NAME()
1889                  * macro.
1890                  */
1891                 s = object_search_ctlv(fo->tstate, cmd->arg1, 0);
1892                 if (s == NULL)
1893                         s = object_search_ctlv(fo->tstate,
1894                             cmd->arg1, IPFW_TLV_EACTION_NAME(
1895                             state->eaction->arg1));
1896                 bprintf(bp, " %s", s);
1897                 break;
1898         case O_EXTERNAL_DATA:
1899                 if (state->eaction == NULL)
1900                         break;
1901                 /*
1902                  * Currently we support data formatting only for
1903                  * external data with datalen u16. For unknown data
1904                  * print its size in bytes.
1905                  */
1906                 if (cmd->len == F_INSN_SIZE(ipfw_insn))
1907                         bprintf(bp, " %u", cmd->arg1);
1908                 else
1909                         bprintf(bp, " %ubytes",
1910                             cmd->len * sizeof(uint32_t));
1911                 break;
1912         case O_SETDSCP:
1913                 if (cmd->arg1 == IP_FW_TARG) {
1914                         bprintf(bp, "setdscp tablearg");
1915                         break;
1916                 }
1917                 s = match_value(f_ipdscp, cmd->arg1 & 0x3F);
1918                 if (s != NULL)
1919                         bprintf(bp, "setdscp %s", s);
1920                 else
1921                         bprintf(bp, "setdscp %s", cmd->arg1 & 0x3F);
1922                 break;
1923         case O_REASS:
1924                 bprintf(bp, "reass");
1925                 break;
1926         case O_CALLRETURN:
1927                 if (cmd->len & F_NOT)
1928                         bprintf(bp, "return");
1929                 else
1930                         bprint_uint_arg(bp, "call ", cmd->arg1);
1931                 break;
1932         default:
1933                 bprintf(bp, "** unrecognized action %d len %d ",
1934                         cmd->opcode, cmd->len);
1935         }
1936         mark_printed(state, cmd);
1937
1938         return (1);
1939 }
1940
1941
1942 static ipfw_insn *
1943 print_action(struct buf_pr *bp, struct format_opts *fo,
1944     struct show_state *state, uint8_t opcode)
1945 {
1946         ipfw_insn *cmd;
1947         int l;
1948
1949         for (l = state->rule->cmd_len - state->rule->act_ofs,
1950             cmd = ACTION_PTR(state->rule); l > 0;
1951             l -= F_LEN(cmd), cmd += F_LEN(cmd)) {
1952                 if (cmd->opcode != opcode)
1953                         continue;
1954                 if (!print_action_instruction(bp, fo, state, cmd))
1955                         continue;
1956                 return (cmd);
1957         }
1958         return (NULL);
1959 }
1960
1961 static void
1962 print_proto(struct buf_pr *bp, struct format_opts *fo,
1963     struct show_state *state)
1964 {
1965         ipfw_insn *cmd;
1966         int l, proto, ip4, ip6, tmp;
1967
1968         /* Count all O_PROTO, O_IP4, O_IP6 instructions. */
1969         proto = tmp = ip4 = ip6 = 0;
1970         for (l = state->rule->act_ofs, cmd = state->rule->cmd;
1971             l > 0; l -= F_LEN(cmd), cmd += F_LEN(cmd)) {
1972                 switch (cmd->opcode) {
1973                 case O_PROTO:
1974                         proto++;
1975                         break;
1976                 case O_IP4:
1977                         ip4 = 1;
1978                         if (cmd->len & F_OR)
1979                                 ip4++;
1980                         break;
1981                 case O_IP6:
1982                         ip6 = 1;
1983                         if (cmd->len & F_OR)
1984                                 ip6++;
1985                         break;
1986                 default:
1987                         continue;
1988                 }
1989         }
1990         if (proto == 0 && ip4 == 0 && ip6 == 0) {
1991                 state->proto = IPPROTO_IP;
1992                 state->flags |= HAVE_PROTO;
1993                 bprintf(bp, " ip");
1994                 return;
1995         }
1996         /* To handle the case { ip4 or ip6 }, print opcode with F_OR first */
1997         cmd = NULL;
1998         if (ip4 || ip6)
1999                 cmd = print_opcode(bp, fo, state, ip4 > ip6 ? O_IP4: O_IP6);
2000         if (cmd != NULL && (cmd->len & F_OR))
2001                 cmd = print_opcode(bp, fo, state, ip4 > ip6 ? O_IP6: O_IP4);
2002         if (cmd == NULL || (cmd->len & F_OR))
2003                 for (l = proto; l > 0; l--) {
2004                         cmd = print_opcode(bp, fo, state, O_PROTO);
2005                         if (cmd != NULL && (cmd->len & F_OR) == 0)
2006                                 break;
2007                         tmp = cmd->arg1;
2008                 }
2009         /* Initialize proto, it is used by print_newports() */
2010         if (tmp != 0)
2011                 state->proto = tmp;
2012         else if (ip6 != 0)
2013                 state->proto = IPPROTO_IPV6;
2014         else
2015                 state->proto = IPPROTO_IP;
2016         state->flags |= HAVE_PROTO;
2017 }
2018
2019 static int
2020 match_opcode(int opcode, const int opcodes[], size_t nops)
2021 {
2022         int i;
2023
2024         for (i = 0; i < nops; i++)
2025                 if (opcode == opcodes[i])
2026                         return (1);
2027         return (0);
2028 }
2029
2030 static void
2031 print_address(struct buf_pr *bp, struct format_opts *fo,
2032     struct show_state *state, const int opcodes[], size_t nops, int portop,
2033     int flag)
2034 {
2035         ipfw_insn *cmd;
2036         int count, l, portcnt, pf;
2037
2038         count = portcnt = 0;
2039         for (l = state->rule->act_ofs, cmd = state->rule->cmd;
2040             l > 0; l -= F_LEN(cmd), cmd += F_LEN(cmd)) {
2041                 if (match_opcode(cmd->opcode, opcodes, nops))
2042                         count++;
2043                 else if (cmd->opcode == portop)
2044                         portcnt++;
2045         }
2046         if (count == 0)
2047                 bprintf(bp, " any");
2048         for (l = state->rule->act_ofs, cmd = state->rule->cmd;
2049             l > 0 && count > 0; l -= F_LEN(cmd), cmd += F_LEN(cmd)) {
2050                 if (!match_opcode(cmd->opcode, opcodes, nops))
2051                         continue;
2052                 print_instruction(bp, fo, state, cmd);
2053                 if ((cmd->len & F_OR) == 0)
2054                         break;
2055                 count--;
2056         }
2057         /*
2058          * If several O_IP_?PORT opcodes specified, leave them to the
2059          * options section.
2060          */
2061         if (portcnt == 1) {
2062                 for (l = state->rule->act_ofs, cmd = state->rule->cmd, pf = 0;
2063                     l > 0; l -= F_LEN(cmd), cmd += F_LEN(cmd)) {
2064                         if (cmd->opcode != portop) {
2065                                 pf = (cmd->len & F_OR);
2066                                 continue;
2067                         }
2068                         /* Print opcode iff it is not in OR block. */
2069                         if (pf == 0 && (cmd->len & F_OR) == 0)
2070                                 print_instruction(bp, fo, state, cmd);
2071                         break;
2072                 }
2073         }
2074         state->flags |= flag;
2075 }
2076
2077 static const int action_opcodes[] = {
2078         O_CHECK_STATE, O_ACCEPT, O_COUNT, O_DENY, O_REJECT,
2079         O_UNREACH6, O_SKIPTO, O_PIPE, O_QUEUE, O_DIVERT, O_TEE,
2080         O_NETGRAPH, O_NGTEE, O_FORWARD_IP, O_FORWARD_IP6, O_NAT,
2081         O_SETFIB, O_SETDSCP, O_REASS, O_CALLRETURN,
2082         /* keep the following opcodes at the end of the list */
2083         O_EXTERNAL_ACTION, O_EXTERNAL_INSTANCE, O_EXTERNAL_DATA
2084 };
2085
2086 static const int modifier_opcodes[] = {
2087         O_LOG, O_ALTQ, O_TAG
2088 };
2089
2090 static const int src_opcodes[] = {
2091         O_IP_SRC, O_IP_SRC_LOOKUP, O_IP_SRC_MASK, O_IP_SRC_ME,
2092         O_IP_SRC_SET, O_IP6_SRC, O_IP6_SRC_MASK, O_IP6_SRC_ME
2093 };
2094
2095 static const int dst_opcodes[] = {
2096         O_IP_DST, O_IP_DST_LOOKUP, O_IP_DST_MASK, O_IP_DST_ME,
2097         O_IP_DST_SET, O_IP6_DST, O_IP6_DST_MASK, O_IP6_DST_ME
2098 };
2099
2100 static void
2101 show_static_rule(struct cmdline_opts *co, struct format_opts *fo,
2102     struct buf_pr *bp, struct ip_fw_rule *rule, struct ip_fw_bcounter *cntr)
2103 {
2104         struct show_state state;
2105         ipfw_insn *cmd;
2106         static int twidth = 0;
2107         int i;
2108
2109         /* Print # DISABLED or skip the rule */
2110         if ((fo->set_mask & (1 << rule->set)) == 0) {
2111                 /* disabled mask */
2112                 if (!co->show_sets)
2113                         return;
2114                 else
2115                         bprintf(bp, "# DISABLED ");
2116         }
2117         if (init_show_state(&state, rule) != 0) {
2118                 warn("init_show_state() failed");
2119                 return;
2120         }
2121         bprintf(bp, "%05u ", rule->rulenum);
2122
2123         /* Print counters if enabled */
2124         if (fo->pcwidth > 0 || fo->bcwidth > 0) {
2125                 pr_u64(bp, &cntr->pcnt, fo->pcwidth);
2126                 pr_u64(bp, &cntr->bcnt, fo->bcwidth);
2127         }
2128
2129         /* Print timestamp */
2130         if (co->do_time == TIMESTAMP_NUMERIC)
2131                 bprintf(bp, "%10u ", cntr->timestamp);
2132         else if (co->do_time == TIMESTAMP_STRING) {
2133                 char timestr[30];
2134                 time_t t = (time_t)0;
2135
2136                 if (twidth == 0) {
2137                         strcpy(timestr, ctime(&t));
2138                         *strchr(timestr, '\n') = '\0';
2139                         twidth = strlen(timestr);
2140                 }
2141                 if (cntr->timestamp > 0) {
2142                         t = _long_to_time(cntr->timestamp);
2143
2144                         strcpy(timestr, ctime(&t));
2145                         *strchr(timestr, '\n') = '\0';
2146                         bprintf(bp, "%s ", timestr);
2147                 } else {
2148                         bprintf(bp, "%*s", twidth, " ");
2149                 }
2150         }
2151
2152         /* Print set number */
2153         if (co->show_sets)
2154                 bprintf(bp, "set %d ", rule->set);
2155
2156         /* Print the optional "match probability" */
2157         cmd = print_opcode(bp, fo, &state, O_PROB);
2158         /* Print rule action */
2159         for (i = 0; i < nitems(action_opcodes); i++) {
2160                 cmd = print_action(bp, fo, &state, action_opcodes[i]);
2161                 if (cmd == NULL)
2162                         continue;
2163                 /* Handle special cases */
2164                 switch (cmd->opcode) {
2165                 case O_CHECK_STATE:
2166                         goto end;
2167                 case O_EXTERNAL_ACTION:
2168                 case O_EXTERNAL_INSTANCE:
2169                         /* External action can have several instructions */
2170                         continue;
2171                 }
2172                 break;
2173         }
2174         /* Print rule modifiers */
2175         for (i = 0; i < nitems(modifier_opcodes); i++)
2176                 print_action(bp, fo, &state, modifier_opcodes[i]);
2177         /*
2178          * Print rule body
2179          */
2180         if (co->comment_only != 0)
2181                 goto end;
2182         print_proto(bp, fo, &state);
2183
2184         /* Print source */
2185         bprintf(bp, " from");
2186         print_address(bp, fo, &state, src_opcodes, nitems(src_opcodes),
2187             O_IP_SRCPORT, HAVE_SRCIP);
2188
2189         /* Print destination */
2190         bprintf(bp, " to");
2191         print_address(bp, fo, &state, dst_opcodes, nitems(dst_opcodes),
2192             O_IP_DSTPORT, HAVE_DSTIP);
2193
2194         /* Print the rest of options */
2195         while (print_opcode(bp, fo, &state, 0))
2196                 ;
2197 end:
2198         /* Print comment at the end */
2199         cmd = print_opcode(bp, fo, &state, O_NOP);
2200         if (co->comment_only != 0 && cmd == NULL)
2201                 bprintf(bp, " // ...");
2202         bprintf(bp, "\n");
2203         free_show_state(&state);
2204 }
2205
2206 static void
2207 show_dyn_state(struct cmdline_opts *co, struct format_opts *fo,
2208     struct buf_pr *bp, ipfw_dyn_rule *d)
2209 {
2210         struct protoent *pe;
2211         struct in_addr a;
2212         uint16_t rulenum;
2213         char buf[INET6_ADDRSTRLEN];
2214
2215         if (!co->do_expired) {
2216                 if (!d->expire && !(d->dyn_type == O_LIMIT_PARENT))
2217                         return;
2218         }
2219         bcopy(&d->rule, &rulenum, sizeof(rulenum));
2220         bprintf(bp, "%05d", rulenum);
2221         if (fo->pcwidth > 0 || fo->bcwidth > 0) {
2222                 bprintf(bp, " ");
2223                 pr_u64(bp, &d->pcnt, fo->pcwidth);
2224                 pr_u64(bp, &d->bcnt, fo->bcwidth);
2225                 bprintf(bp, "(%ds)", d->expire);
2226         }
2227         switch (d->dyn_type) {
2228         case O_LIMIT_PARENT:
2229                 bprintf(bp, " PARENT %d", d->count);
2230                 break;
2231         case O_LIMIT:
2232                 bprintf(bp, " LIMIT");
2233                 break;
2234         case O_KEEP_STATE: /* bidir, no mask */
2235                 bprintf(bp, " STATE");
2236                 break;
2237         }
2238
2239         if ((pe = getprotobynumber(d->id.proto)) != NULL)
2240                 bprintf(bp, " %s", pe->p_name);
2241         else
2242                 bprintf(bp, " proto %u", d->id.proto);
2243
2244         if (d->id.addr_type == 4) {
2245                 a.s_addr = htonl(d->id.src_ip);
2246                 bprintf(bp, " %s %d", inet_ntoa(a), d->id.src_port);
2247
2248                 a.s_addr = htonl(d->id.dst_ip);
2249                 bprintf(bp, " <-> %s %d", inet_ntoa(a), d->id.dst_port);
2250         } else if (d->id.addr_type == 6) {
2251                 bprintf(bp, " %s %d", inet_ntop(AF_INET6, &d->id.src_ip6, buf,
2252                     sizeof(buf)), d->id.src_port);
2253                 bprintf(bp, " <-> %s %d", inet_ntop(AF_INET6, &d->id.dst_ip6,
2254                     buf, sizeof(buf)), d->id.dst_port);
2255         } else
2256                 bprintf(bp, " UNKNOWN <-> UNKNOWN");
2257         if (d->kidx != 0)
2258                 bprintf(bp, " :%s", object_search_ctlv(fo->tstate,
2259                     d->kidx, IPFW_TLV_STATE_NAME));
2260 }
2261
2262 static int
2263 do_range_cmd(int cmd, ipfw_range_tlv *rt)
2264 {
2265         ipfw_range_header rh;
2266         size_t sz;
2267
2268         memset(&rh, 0, sizeof(rh));
2269         memcpy(&rh.range, rt, sizeof(*rt));
2270         rh.range.head.length = sizeof(*rt);
2271         rh.range.head.type = IPFW_TLV_RANGE;
2272         sz = sizeof(rh);
2273
2274         if (do_get3(cmd, &rh.opheader, &sz) != 0)
2275                 return (-1);
2276         /* Save number of matched objects */
2277         rt->new_set = rh.range.new_set;
2278         return (0);
2279 }
2280
2281 /*
2282  * This one handles all set-related commands
2283  *      ipfw set { show | enable | disable }
2284  *      ipfw set swap X Y
2285  *      ipfw set move X to Y
2286  *      ipfw set move rule X to Y
2287  */
2288 void
2289 ipfw_sets_handler(char *av[])
2290 {
2291         ipfw_range_tlv rt;
2292         char *msg;
2293         size_t size;
2294         uint32_t masks[2];
2295         int i;
2296         uint16_t rulenum;
2297         uint8_t cmd;
2298
2299         av++;
2300         memset(&rt, 0, sizeof(rt));
2301
2302         if (av[0] == NULL)
2303                 errx(EX_USAGE, "set needs command");
2304         if (_substrcmp(*av, "show") == 0) {
2305                 struct format_opts fo;
2306                 ipfw_cfg_lheader *cfg;
2307
2308                 memset(&fo, 0, sizeof(fo));
2309                 if (ipfw_get_config(&co, &fo, &cfg, &size) != 0)
2310                         err(EX_OSERR, "requesting config failed");
2311
2312                 for (i = 0, msg = "disable"; i < RESVD_SET; i++)
2313                         if ((cfg->set_mask & (1<<i)) == 0) {
2314                                 printf("%s %d", msg, i);
2315                                 msg = "";
2316                         }
2317                 msg = (cfg->set_mask != (uint32_t)-1) ? " enable" : "enable";
2318                 for (i = 0; i < RESVD_SET; i++)
2319                         if ((cfg->set_mask & (1<<i)) != 0) {
2320                                 printf("%s %d", msg, i);
2321                                 msg = "";
2322                         }
2323                 printf("\n");
2324                 free(cfg);
2325         } else if (_substrcmp(*av, "swap") == 0) {
2326                 av++;
2327                 if ( av[0] == NULL || av[1] == NULL )
2328                         errx(EX_USAGE, "set swap needs 2 set numbers\n");
2329                 rt.set = atoi(av[0]);
2330                 rt.new_set = atoi(av[1]);
2331                 if (!isdigit(*(av[0])) || rt.set > RESVD_SET)
2332                         errx(EX_DATAERR, "invalid set number %s\n", av[0]);
2333                 if (!isdigit(*(av[1])) || rt.new_set > RESVD_SET)
2334                         errx(EX_DATAERR, "invalid set number %s\n", av[1]);
2335                 i = do_range_cmd(IP_FW_SET_SWAP, &rt);
2336         } else if (_substrcmp(*av, "move") == 0) {
2337                 av++;
2338                 if (av[0] && _substrcmp(*av, "rule") == 0) {
2339                         rt.flags = IPFW_RCFLAG_RANGE; /* move rules to new set */
2340                         cmd = IP_FW_XMOVE;
2341                         av++;
2342                 } else
2343                         cmd = IP_FW_SET_MOVE; /* Move set to new one */
2344                 if (av[0] == NULL || av[1] == NULL || av[2] == NULL ||
2345                                 av[3] != NULL ||  _substrcmp(av[1], "to") != 0)
2346                         errx(EX_USAGE, "syntax: set move [rule] X to Y\n");
2347                 rulenum = atoi(av[0]);
2348                 rt.new_set = atoi(av[2]);
2349                 if (cmd == IP_FW_XMOVE) {
2350                         rt.start_rule = rulenum;
2351                         rt.end_rule = rulenum;
2352                 } else
2353                         rt.set = rulenum;
2354                 rt.new_set = atoi(av[2]);
2355                 if (!isdigit(*(av[0])) || (cmd == 3 && rt.set > RESVD_SET) ||
2356                         (cmd == 2 && rt.start_rule == IPFW_DEFAULT_RULE) )
2357                         errx(EX_DATAERR, "invalid source number %s\n", av[0]);
2358                 if (!isdigit(*(av[2])) || rt.new_set > RESVD_SET)
2359                         errx(EX_DATAERR, "invalid dest. set %s\n", av[1]);
2360                 i = do_range_cmd(cmd, &rt);
2361                 if (i < 0)
2362                         err(EX_OSERR, "failed to move %s",
2363                             cmd == IP_FW_SET_MOVE ? "set": "rule");
2364         } else if (_substrcmp(*av, "disable") == 0 ||
2365                    _substrcmp(*av, "enable") == 0 ) {
2366                 int which = _substrcmp(*av, "enable") == 0 ? 1 : 0;
2367
2368                 av++;
2369                 masks[0] = masks[1] = 0;
2370
2371                 while (av[0]) {
2372                         if (isdigit(**av)) {
2373                                 i = atoi(*av);
2374                                 if (i < 0 || i > RESVD_SET)
2375                                         errx(EX_DATAERR,
2376                                             "invalid set number %d\n", i);
2377                                 masks[which] |= (1<<i);
2378                         } else if (_substrcmp(*av, "disable") == 0)
2379                                 which = 0;
2380                         else if (_substrcmp(*av, "enable") == 0)
2381                                 which = 1;
2382                         else
2383                                 errx(EX_DATAERR,
2384                                         "invalid set command %s\n", *av);
2385                         av++;
2386                 }
2387                 if ( (masks[0] & masks[1]) != 0 )
2388                         errx(EX_DATAERR,
2389                             "cannot enable and disable the same set\n");
2390
2391                 rt.set = masks[0];
2392                 rt.new_set = masks[1];
2393                 i = do_range_cmd(IP_FW_SET_ENABLE, &rt);
2394                 if (i)
2395                         warn("set enable/disable: setsockopt(IP_FW_SET_ENABLE)");
2396         } else
2397                 errx(EX_USAGE, "invalid set command %s\n", *av);
2398 }
2399
2400 void
2401 ipfw_sysctl_handler(char *av[], int which)
2402 {
2403         av++;
2404
2405         if (av[0] == NULL) {
2406                 warnx("missing keyword to enable/disable\n");
2407         } else if (_substrcmp(*av, "firewall") == 0) {
2408                 sysctlbyname("net.inet.ip.fw.enable", NULL, 0,
2409                     &which, sizeof(which));
2410                 sysctlbyname("net.inet6.ip6.fw.enable", NULL, 0,
2411                     &which, sizeof(which));
2412         } else if (_substrcmp(*av, "one_pass") == 0) {
2413                 sysctlbyname("net.inet.ip.fw.one_pass", NULL, 0,
2414                     &which, sizeof(which));
2415         } else if (_substrcmp(*av, "debug") == 0) {
2416                 sysctlbyname("net.inet.ip.fw.debug", NULL, 0,
2417                     &which, sizeof(which));
2418         } else if (_substrcmp(*av, "verbose") == 0) {
2419                 sysctlbyname("net.inet.ip.fw.verbose", NULL, 0,
2420                     &which, sizeof(which));
2421         } else if (_substrcmp(*av, "dyn_keepalive") == 0) {
2422                 sysctlbyname("net.inet.ip.fw.dyn_keepalive", NULL, 0,
2423                     &which, sizeof(which));
2424 #ifndef NO_ALTQ
2425         } else if (_substrcmp(*av, "altq") == 0) {
2426                 altq_set_enabled(which);
2427 #endif
2428         } else {
2429                 warnx("unrecognize enable/disable keyword: %s\n", *av);
2430         }
2431 }
2432
2433 typedef void state_cb(struct cmdline_opts *co, struct format_opts *fo,
2434     void *arg, void *state);
2435
2436 static void
2437 prepare_format_dyn(struct cmdline_opts *co, struct format_opts *fo,
2438     void *arg, void *_state)
2439 {
2440         ipfw_dyn_rule *d;
2441         int width;
2442         uint8_t set;
2443
2444         d = (ipfw_dyn_rule *)_state;
2445         /* Count _ALL_ states */
2446         fo->dcnt++;
2447
2448         if (fo->show_counters == 0)
2449                 return;
2450
2451         if (co->use_set) {
2452                 /* skip states from another set */
2453                 bcopy((char *)&d->rule + sizeof(uint16_t), &set,
2454                     sizeof(uint8_t));
2455                 if (set != co->use_set - 1)
2456                         return;
2457         }
2458
2459         width = pr_u64(NULL, &d->pcnt, 0);
2460         if (width > fo->pcwidth)
2461                 fo->pcwidth = width;
2462
2463         width = pr_u64(NULL, &d->bcnt, 0);
2464         if (width > fo->bcwidth)
2465                 fo->bcwidth = width;
2466 }
2467
2468 static int
2469 foreach_state(struct cmdline_opts *co, struct format_opts *fo,
2470     caddr_t base, size_t sz, state_cb dyn_bc, void *dyn_arg)
2471 {
2472         int ttype;
2473         state_cb *fptr;
2474         void *farg;
2475         ipfw_obj_tlv *tlv;
2476         ipfw_obj_ctlv *ctlv;
2477
2478         fptr = NULL;
2479         ttype = 0;
2480
2481         while (sz > 0) {
2482                 ctlv = (ipfw_obj_ctlv *)base;
2483                 switch (ctlv->head.type) {
2484                 case IPFW_TLV_DYNSTATE_LIST:
2485                         base += sizeof(*ctlv);
2486                         sz -= sizeof(*ctlv);
2487                         ttype = IPFW_TLV_DYN_ENT;
2488                         fptr = dyn_bc;
2489                         farg = dyn_arg;
2490                         break;
2491                 default:
2492                         return (sz);
2493                 }
2494
2495                 while (sz > 0) {
2496                         tlv = (ipfw_obj_tlv *)base;
2497                         if (tlv->type != ttype)
2498                                 break;
2499
2500                         fptr(co, fo, farg, tlv + 1);
2501                         sz -= tlv->length;
2502                         base += tlv->length;
2503                 }
2504         }
2505
2506         return (sz);
2507 }
2508
2509 static void
2510 prepare_format_opts(struct cmdline_opts *co, struct format_opts *fo,
2511     ipfw_obj_tlv *rtlv, int rcnt, caddr_t dynbase, size_t dynsz)
2512 {
2513         int bcwidth, pcwidth, width;
2514         int n;
2515         struct ip_fw_bcounter *cntr;
2516         struct ip_fw_rule *r;
2517
2518         bcwidth = 0;
2519         pcwidth = 0;
2520         if (fo->show_counters != 0) {
2521                 for (n = 0; n < rcnt; n++,
2522                     rtlv = (ipfw_obj_tlv *)((caddr_t)rtlv + rtlv->length)) {
2523                         cntr = (struct ip_fw_bcounter *)(rtlv + 1);
2524                         r = (struct ip_fw_rule *)((caddr_t)cntr + cntr->size);
2525                         /* skip rules from another set */
2526                         if (co->use_set && r->set != co->use_set - 1)
2527                                 continue;
2528
2529                         /* packet counter */
2530                         width = pr_u64(NULL, &cntr->pcnt, 0);
2531                         if (width > pcwidth)
2532                                 pcwidth = width;
2533
2534                         /* byte counter */
2535                         width = pr_u64(NULL, &cntr->bcnt, 0);
2536                         if (width > bcwidth)
2537                                 bcwidth = width;
2538                 }
2539         }
2540         fo->bcwidth = bcwidth;
2541         fo->pcwidth = pcwidth;
2542
2543         fo->dcnt = 0;
2544         if (co->do_dynamic && dynsz > 0)
2545                 foreach_state(co, fo, dynbase, dynsz, prepare_format_dyn, NULL);
2546 }
2547
2548 static int
2549 list_static_range(struct cmdline_opts *co, struct format_opts *fo,
2550     struct buf_pr *bp, ipfw_obj_tlv *rtlv, int rcnt)
2551 {
2552         int n, seen;
2553         struct ip_fw_rule *r;
2554         struct ip_fw_bcounter *cntr;
2555         int c = 0;
2556
2557         for (n = seen = 0; n < rcnt; n++,
2558             rtlv = (ipfw_obj_tlv *)((caddr_t)rtlv + rtlv->length)) {
2559
2560                 if ((fo->show_counters | fo->show_time) != 0) {
2561                         cntr = (struct ip_fw_bcounter *)(rtlv + 1);
2562                         r = (struct ip_fw_rule *)((caddr_t)cntr + cntr->size);
2563                 } else {
2564                         cntr = NULL;
2565                         r = (struct ip_fw_rule *)(rtlv + 1);
2566                 }
2567                 if (r->rulenum > fo->last)
2568                         break;
2569                 if (co->use_set && r->set != co->use_set - 1)
2570                         continue;
2571                 if (r->rulenum >= fo->first && r->rulenum <= fo->last) {
2572                         show_static_rule(co, fo, bp, r, cntr);
2573                         printf("%s", bp->buf);
2574                         c += rtlv->length;
2575                         bp_flush(bp);
2576                         seen++;
2577                 }
2578         }
2579
2580         return (seen);
2581 }
2582
2583 static void
2584 list_dyn_state(struct cmdline_opts *co, struct format_opts *fo,
2585     void *_arg, void *_state)
2586 {
2587         uint16_t rulenum;
2588         uint8_t set;
2589         ipfw_dyn_rule *d;
2590         struct buf_pr *bp;
2591
2592         d = (ipfw_dyn_rule *)_state;
2593         bp = (struct buf_pr *)_arg;
2594
2595         bcopy(&d->rule, &rulenum, sizeof(rulenum));
2596         if (rulenum > fo->last)
2597                 return;
2598         if (co->use_set) {
2599                 bcopy((char *)&d->rule + sizeof(uint16_t),
2600                       &set, sizeof(uint8_t));
2601                 if (set != co->use_set - 1)
2602                         return;
2603         }
2604         if (rulenum >= fo->first) {
2605                 show_dyn_state(co, fo, bp, d);
2606                 printf("%s\n", bp->buf);
2607                 bp_flush(bp);
2608         }
2609 }
2610
2611 static int
2612 list_dyn_range(struct cmdline_opts *co, struct format_opts *fo,
2613     struct buf_pr *bp, caddr_t base, size_t sz)
2614 {
2615
2616         sz = foreach_state(co, fo, base, sz, list_dyn_state, bp);
2617         return (sz);
2618 }
2619
2620 void
2621 ipfw_list(int ac, char *av[], int show_counters)
2622 {
2623         ipfw_cfg_lheader *cfg;
2624         struct format_opts sfo;
2625         size_t sz;
2626         int error;
2627         int lac;
2628         char **lav;
2629         uint32_t rnum;
2630         char *endptr;
2631
2632         if (co.test_only) {
2633                 fprintf(stderr, "Testing only, list disabled\n");
2634                 return;
2635         }
2636         if (co.do_pipe) {
2637                 dummynet_list(ac, av, show_counters);
2638                 return;
2639         }
2640
2641         ac--;
2642         av++;
2643         memset(&sfo, 0, sizeof(sfo));
2644
2645         /* Determine rule range to request */
2646         if (ac > 0) {
2647                 for (lac = ac, lav = av; lac != 0; lac--) {
2648                         rnum = strtoul(*lav++, &endptr, 10);
2649                         if (sfo.first == 0 || rnum < sfo.first)
2650                                 sfo.first = rnum;
2651
2652                         if (*endptr == '-')
2653                                 rnum = strtoul(endptr + 1, &endptr, 10);
2654                         if (sfo.last == 0 || rnum > sfo.last)
2655                                 sfo.last = rnum;
2656                 }
2657         }
2658
2659         /* get configuraion from kernel */
2660         cfg = NULL;
2661         sfo.show_counters = show_counters;
2662         sfo.show_time = co.do_time;
2663         sfo.flags = IPFW_CFG_GET_STATIC;
2664         if (co.do_dynamic != 0)
2665                 sfo.flags |= IPFW_CFG_GET_STATES;
2666         if ((sfo.show_counters | sfo.show_time) != 0)
2667                 sfo.flags |= IPFW_CFG_GET_COUNTERS;
2668         if (ipfw_get_config(&co, &sfo, &cfg, &sz) != 0)
2669                 err(EX_OSERR, "retrieving config failed");
2670
2671         error = ipfw_show_config(&co, &sfo, cfg, sz, ac, av);
2672
2673         free(cfg);
2674
2675         if (error != EX_OK)
2676                 exit(error);
2677 }
2678
2679 static int
2680 ipfw_show_config(struct cmdline_opts *co, struct format_opts *fo,
2681     ipfw_cfg_lheader *cfg, size_t sz, int ac, char *av[])
2682 {
2683         caddr_t dynbase;
2684         size_t dynsz;
2685         int rcnt;
2686         int exitval = EX_OK;
2687         int lac;
2688         char **lav;
2689         char *endptr;
2690         size_t readsz;
2691         struct buf_pr bp;
2692         ipfw_obj_ctlv *ctlv, *tstate;
2693         ipfw_obj_tlv *rbase;
2694
2695         /*
2696          * Handle tablenames TLV first, if any
2697          */
2698         tstate = NULL;
2699         rbase = NULL;
2700         dynbase = NULL;
2701         dynsz = 0;
2702         readsz = sizeof(*cfg);
2703         rcnt = 0;
2704
2705         fo->set_mask = cfg->set_mask;
2706
2707         ctlv = (ipfw_obj_ctlv *)(cfg + 1);
2708
2709         if (cfg->flags & IPFW_CFG_GET_STATIC) {
2710                 /* We've requested static rules */
2711                 if (ctlv->head.type == IPFW_TLV_TBLNAME_LIST) {
2712                         object_sort_ctlv(ctlv);
2713                         fo->tstate = ctlv;
2714                         readsz += ctlv->head.length;
2715                         ctlv = (ipfw_obj_ctlv *)((caddr_t)ctlv +
2716                             ctlv->head.length);
2717                 }
2718
2719                 if (ctlv->head.type == IPFW_TLV_RULE_LIST) {
2720                         rbase = (ipfw_obj_tlv *)(ctlv + 1);
2721                         rcnt = ctlv->count;
2722                         readsz += ctlv->head.length;
2723                         ctlv = (ipfw_obj_ctlv *)((caddr_t)ctlv +
2724                             ctlv->head.length);
2725                 }
2726         }
2727
2728         if ((cfg->flags & IPFW_CFG_GET_STATES) && (readsz != sz))  {
2729                 /* We may have some dynamic states */
2730                 dynsz = sz - readsz;
2731                 /* Skip empty header */
2732                 if (dynsz != sizeof(ipfw_obj_ctlv))
2733                         dynbase = (caddr_t)ctlv;
2734                 else
2735                         dynsz = 0;
2736         }
2737
2738         prepare_format_opts(co, fo, rbase, rcnt, dynbase, dynsz);
2739         bp_alloc(&bp, 4096);
2740
2741         /* if no rule numbers were specified, list all rules */
2742         if (ac == 0) {
2743                 fo->first = 0;
2744                 fo->last = IPFW_DEFAULT_RULE;
2745                 list_static_range(co, fo, &bp, rbase, rcnt);
2746
2747                 if (co->do_dynamic && dynsz > 0) {
2748                         printf("## Dynamic rules (%d %zu):\n", fo->dcnt, dynsz);
2749                         list_dyn_range(co, fo, &bp, dynbase, dynsz);
2750                 }
2751
2752                 bp_free(&bp);
2753                 return (EX_OK);
2754         }
2755
2756         /* display specific rules requested on command line */
2757         for (lac = ac, lav = av; lac != 0; lac--) {
2758                 /* convert command line rule # */
2759                 fo->last = fo->first = strtoul(*lav++, &endptr, 10);
2760                 if (*endptr == '-')
2761                         fo->last = strtoul(endptr + 1, &endptr, 10);
2762                 if (*endptr) {
2763                         exitval = EX_USAGE;
2764                         warnx("invalid rule number: %s", *(lav - 1));
2765                         continue;
2766                 }
2767
2768                 if (list_static_range(co, fo, &bp, rbase, rcnt) == 0) {
2769                         /* give precedence to other error(s) */
2770                         if (exitval == EX_OK)
2771                                 exitval = EX_UNAVAILABLE;
2772                         if (fo->first == fo->last)
2773                                 warnx("rule %u does not exist", fo->first);
2774                         else
2775                                 warnx("no rules in range %u-%u",
2776                                     fo->first, fo->last);
2777                 }
2778         }
2779
2780         if (co->do_dynamic && dynsz > 0) {
2781                 printf("## Dynamic rules:\n");
2782                 for (lac = ac, lav = av; lac != 0; lac--) {
2783                         fo->last = fo->first = strtoul(*lav++, &endptr, 10);
2784                         if (*endptr == '-')
2785                                 fo->last = strtoul(endptr+1, &endptr, 10);
2786                         if (*endptr)
2787                                 /* already warned */
2788                                 continue;
2789                         list_dyn_range(co, fo, &bp, dynbase, dynsz);
2790                 }
2791         }
2792
2793         bp_free(&bp);
2794         return (exitval);
2795 }
2796
2797
2798 /*
2799  * Retrieves current ipfw configuration of given type
2800  * and stores its pointer to @pcfg.
2801  *
2802  * Caller is responsible for freeing @pcfg.
2803  *
2804  * Returns 0 on success.
2805  */
2806
2807 static int
2808 ipfw_get_config(struct cmdline_opts *co, struct format_opts *fo,
2809     ipfw_cfg_lheader **pcfg, size_t *psize)
2810 {
2811         ipfw_cfg_lheader *cfg;
2812         size_t sz;
2813         int i;
2814
2815
2816         if (co->test_only != 0) {
2817                 fprintf(stderr, "Testing only, list disabled\n");
2818                 return (0);
2819         }
2820
2821         /* Start with some data size */
2822         sz = 4096;
2823         cfg = NULL;
2824
2825         for (i = 0; i < 16; i++) {
2826                 if (cfg != NULL)
2827                         free(cfg);
2828                 if ((cfg = calloc(1, sz)) == NULL)
2829                         return (ENOMEM);
2830
2831                 cfg->flags = fo->flags;
2832                 cfg->start_rule = fo->first;
2833                 cfg->end_rule = fo->last;
2834
2835                 if (do_get3(IP_FW_XGET, &cfg->opheader, &sz) != 0) {
2836                         if (errno != ENOMEM) {
2837                                 free(cfg);
2838                                 return (errno);
2839                         }
2840
2841                         /* Buffer size is not enough. Try to increase */
2842                         sz = sz * 2;
2843                         if (sz < cfg->size)
2844                                 sz = cfg->size;
2845                         continue;
2846                 }
2847
2848                 *pcfg = cfg;
2849                 *psize = sz;
2850                 return (0);
2851         }
2852
2853         free(cfg);
2854         return (ENOMEM);
2855 }
2856
2857 static int
2858 lookup_host (char *host, struct in_addr *ipaddr)
2859 {
2860         struct hostent *he;
2861
2862         if (!inet_aton(host, ipaddr)) {
2863                 if ((he = gethostbyname(host)) == NULL)
2864                         return(-1);
2865                 *ipaddr = *(struct in_addr *)he->h_addr_list[0];
2866         }
2867         return(0);
2868 }
2869
2870 struct tidx {
2871         ipfw_obj_ntlv *idx;
2872         uint32_t count;
2873         uint32_t size;
2874         uint16_t counter;
2875         uint8_t set;
2876 };
2877
2878 int
2879 ipfw_check_object_name(const char *name)
2880 {
2881         int c, i, l;
2882
2883         /*
2884          * Check that name is null-terminated and contains
2885          * valid symbols only. Valid mask is:
2886          * [a-zA-Z0-9\-_\.]{1,63}
2887          */
2888         l = strlen(name);
2889         if (l == 0 || l >= 64)
2890                 return (EINVAL);
2891         for (i = 0; i < l; i++) {
2892                 c = name[i];
2893                 if (isalpha(c) || isdigit(c) || c == '_' ||
2894                     c == '-' || c == '.')
2895                         continue;
2896                 return (EINVAL);
2897         }
2898         return (0);
2899 }
2900
2901 static char *default_state_name = "default";
2902 static int
2903 state_check_name(const char *name)
2904 {
2905
2906         if (ipfw_check_object_name(name) != 0)
2907                 return (EINVAL);
2908         if (strcmp(name, "any") == 0)
2909                 return (EINVAL);
2910         return (0);
2911 }
2912
2913 static int
2914 eaction_check_name(const char *name)
2915 {
2916
2917         if (ipfw_check_object_name(name) != 0)
2918                 return (EINVAL);
2919         /* Restrict some 'special' names */
2920         if (match_token(rule_actions, name) != -1 &&
2921             match_token(rule_action_params, name) != -1)
2922                 return (EINVAL);
2923         return (0);
2924 }
2925
2926 static uint16_t
2927 pack_object(struct tidx *tstate, char *name, int otype)
2928 {
2929         int i;
2930         ipfw_obj_ntlv *ntlv;
2931
2932         for (i = 0; i < tstate->count; i++) {
2933                 if (strcmp(tstate->idx[i].name, name) != 0)
2934                         continue;
2935                 if (tstate->idx[i].set != tstate->set)
2936                         continue;
2937                 if (tstate->idx[i].head.type != otype)
2938                         continue;
2939
2940                 return (tstate->idx[i].idx);
2941         }
2942
2943         if (tstate->count + 1 > tstate->size) {
2944                 tstate->size += 4;
2945                 tstate->idx = realloc(tstate->idx, tstate->size *
2946                     sizeof(ipfw_obj_ntlv));
2947                 if (tstate->idx == NULL)
2948                         return (0);
2949         }
2950
2951         ntlv = &tstate->idx[i];
2952         memset(ntlv, 0, sizeof(ipfw_obj_ntlv));
2953         strlcpy(ntlv->name, name, sizeof(ntlv->name));
2954         ntlv->head.type = otype;
2955         ntlv->head.length = sizeof(ipfw_obj_ntlv);
2956         ntlv->set = tstate->set;
2957         ntlv->idx = ++tstate->counter;
2958         tstate->count++;
2959
2960         return (ntlv->idx);
2961 }
2962
2963 static uint16_t
2964 pack_table(struct tidx *tstate, char *name)
2965 {
2966
2967         if (table_check_name(name) != 0)
2968                 return (0);
2969
2970         return (pack_object(tstate, name, IPFW_TLV_TBL_NAME));
2971 }
2972
2973 void
2974 fill_table(struct _ipfw_insn *cmd, char *av, uint8_t opcode,
2975     struct tidx *tstate)
2976 {
2977         uint32_t *d = ((ipfw_insn_u32 *)cmd)->d;
2978         uint16_t uidx;
2979         char *p;
2980
2981         if ((p = strchr(av + 6, ')')) == NULL)
2982                 errx(EX_DATAERR, "forgotten parenthesis: '%s'", av);
2983         *p = '\0';
2984         p = strchr(av + 6, ',');
2985         if (p)
2986                 *p++ = '\0';
2987
2988         if ((uidx = pack_table(tstate, av + 6)) == 0)
2989                 errx(EX_DATAERR, "Invalid table name: %s", av + 6);
2990
2991         cmd->opcode = opcode;
2992         cmd->arg1 = uidx;
2993         if (p) {
2994                 cmd->len |= F_INSN_SIZE(ipfw_insn_u32);
2995                 d[0] = strtoul(p, NULL, 0);
2996         } else
2997                 cmd->len |= F_INSN_SIZE(ipfw_insn);
2998 }
2999
3000
3001 /*
3002  * fills the addr and mask fields in the instruction as appropriate from av.
3003  * Update length as appropriate.
3004  * The following formats are allowed:
3005  *      me      returns O_IP_*_ME
3006  *      1.2.3.4         single IP address
3007  *      1.2.3.4:5.6.7.8 address:mask
3008  *      1.2.3.4/24      address/mask
3009  *      1.2.3.4/26{1,6,5,4,23}  set of addresses in a subnet
3010  * We can have multiple comma-separated address/mask entries.
3011  */
3012 static void
3013 fill_ip(ipfw_insn_ip *cmd, char *av, int cblen, struct tidx *tstate)
3014 {
3015         int len = 0;
3016         uint32_t *d = ((ipfw_insn_u32 *)cmd)->d;
3017
3018         cmd->o.len &= ~F_LEN_MASK;      /* zero len */
3019
3020         if (_substrcmp(av, "any") == 0)
3021                 return;
3022
3023         if (_substrcmp(av, "me") == 0) {
3024                 cmd->o.len |= F_INSN_SIZE(ipfw_insn);
3025                 return;
3026         }
3027
3028         if (strncmp(av, "table(", 6) == 0) {
3029                 fill_table(&cmd->o, av, O_IP_DST_LOOKUP, tstate);
3030                 return;
3031         }
3032
3033     while (av) {
3034         /*
3035          * After the address we can have '/' or ':' indicating a mask,
3036          * ',' indicating another address follows, '{' indicating a
3037          * set of addresses of unspecified size.
3038          */
3039         char *t = NULL, *p = strpbrk(av, "/:,{");
3040         int masklen;
3041         char md, nd = '\0';
3042
3043         CHECK_LENGTH(cblen, F_INSN_SIZE(ipfw_insn) + 2 + len);
3044
3045         if (p) {
3046                 md = *p;
3047                 *p++ = '\0';
3048                 if ((t = strpbrk(p, ",{")) != NULL) {
3049                         nd = *t;
3050                         *t = '\0';
3051                 }
3052         } else
3053                 md = '\0';
3054
3055         if (lookup_host(av, (struct in_addr *)&d[0]) != 0)
3056                 errx(EX_NOHOST, "hostname ``%s'' unknown", av);
3057         switch (md) {
3058         case ':':
3059                 if (!inet_aton(p, (struct in_addr *)&d[1]))
3060                         errx(EX_DATAERR, "bad netmask ``%s''", p);
3061                 break;
3062         case '/':
3063                 masklen = atoi(p);
3064                 if (masklen == 0)
3065                         d[1] = htonl(0U);       /* mask */
3066                 else if (masklen > 32)
3067                         errx(EX_DATAERR, "bad width ``%s''", p);
3068                 else
3069                         d[1] = htonl(~0U << (32 - masklen));
3070                 break;
3071         case '{':       /* no mask, assume /24 and put back the '{' */
3072                 d[1] = htonl(~0U << (32 - 24));
3073                 *(--p) = md;
3074                 break;
3075
3076         case ',':       /* single address plus continuation */
3077                 *(--p) = md;
3078                 /* FALLTHROUGH */
3079         case 0:         /* initialization value */
3080         default:
3081                 d[1] = htonl(~0U);      /* force /32 */
3082                 break;
3083         }
3084         d[0] &= d[1];           /* mask base address with mask */
3085         if (t)
3086                 *t = nd;
3087         /* find next separator */
3088         if (p)
3089                 p = strpbrk(p, ",{");
3090         if (p && *p == '{') {
3091                 /*
3092                  * We have a set of addresses. They are stored as follows:
3093                  *   arg1       is the set size (powers of 2, 2..256)
3094                  *   addr       is the base address IN HOST FORMAT
3095                  *   mask..     is an array of arg1 bits (rounded up to
3096                  *              the next multiple of 32) with bits set
3097                  *              for each host in the map.
3098                  */
3099                 uint32_t *map = (uint32_t *)&cmd->mask;
3100                 int low, high;
3101                 int i = contigmask((uint8_t *)&(d[1]), 32);
3102
3103                 if (len > 0)
3104                         errx(EX_DATAERR, "address set cannot be in a list");
3105                 if (i < 24 || i > 31)
3106                         errx(EX_DATAERR, "invalid set with mask %d\n", i);
3107                 cmd->o.arg1 = 1<<(32-i);        /* map length           */
3108                 d[0] = ntohl(d[0]);             /* base addr in host format */
3109                 cmd->o.opcode = O_IP_DST_SET;   /* default */
3110                 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32) + (cmd->o.arg1+31)/32;
3111                 for (i = 0; i < (cmd->o.arg1+31)/32 ; i++)
3112                         map[i] = 0;     /* clear map */
3113
3114                 av = p + 1;
3115                 low = d[0] & 0xff;
3116                 high = low + cmd->o.arg1 - 1;
3117                 /*
3118                  * Here, i stores the previous value when we specify a range
3119                  * of addresses within a mask, e.g. 45-63. i = -1 means we
3120                  * have no previous value.
3121                  */
3122                 i = -1; /* previous value in a range */
3123                 while (isdigit(*av)) {
3124                         char *s;
3125                         int a = strtol(av, &s, 0);
3126
3127                         if (s == av) { /* no parameter */
3128                             if (*av != '}')
3129                                 errx(EX_DATAERR, "set not closed\n");
3130                             if (i != -1)
3131                                 errx(EX_DATAERR, "incomplete range %d-", i);
3132                             break;
3133                         }
3134                         if (a < low || a > high)
3135                             errx(EX_DATAERR, "addr %d out of range [%d-%d]\n",
3136                                 a, low, high);
3137                         a -= low;
3138                         if (i == -1)    /* no previous in range */
3139                             i = a;
3140                         else {          /* check that range is valid */
3141                             if (i > a)
3142                                 errx(EX_DATAERR, "invalid range %d-%d",
3143                                         i+low, a+low);
3144                             if (*s == '-')
3145                                 errx(EX_DATAERR, "double '-' in range");
3146                         }
3147                         for (; i <= a; i++)
3148                             map[i/32] |= 1<<(i & 31);
3149                         i = -1;
3150                         if (*s == '-')
3151                             i = a;
3152                         else if (*s == '}')
3153                             break;
3154                         av = s+1;
3155                 }
3156                 return;
3157         }
3158         av = p;
3159         if (av)                 /* then *av must be a ',' */
3160                 av++;
3161
3162         /* Check this entry */
3163         if (d[1] == 0) { /* "any", specified as x.x.x.x/0 */
3164                 /*
3165                  * 'any' turns the entire list into a NOP.
3166                  * 'not any' never matches, so it is removed from the
3167                  * list unless it is the only item, in which case we
3168                  * report an error.
3169                  */
3170                 if (cmd->o.len & F_NOT) {       /* "not any" never matches */
3171                         if (av == NULL && len == 0) /* only this entry */
3172                                 errx(EX_DATAERR, "not any never matches");
3173                 }
3174                 /* else do nothing and skip this entry */
3175                 return;
3176         }
3177         /* A single IP can be stored in an optimized format */
3178         if (d[1] == (uint32_t)~0 && av == NULL && len == 0) {
3179                 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32);
3180                 return;
3181         }
3182         len += 2;       /* two words... */
3183         d += 2;
3184     } /* end while */
3185     if (len + 1 > F_LEN_MASK)
3186         errx(EX_DATAERR, "address list too long");
3187     cmd->o.len |= len+1;
3188 }
3189
3190
3191 /* n2mask sets n bits of the mask */
3192 void
3193 n2mask(struct in6_addr *mask, int n)
3194 {
3195         static int      minimask[9] =
3196             { 0x00, 0x80, 0xc0, 0xe0, 0xf0, 0xf8, 0xfc, 0xfe, 0xff };
3197         u_char          *p;
3198
3199         memset(mask, 0, sizeof(struct in6_addr));
3200         p = (u_char *) mask;
3201         for (; n > 0; p++, n -= 8) {
3202                 if (n >= 8)
3203                         *p = 0xff;
3204                 else
3205                         *p = minimask[n];
3206         }
3207         return;
3208 }
3209
3210 static void
3211 fill_flags_cmd(ipfw_insn *cmd, enum ipfw_opcodes opcode,
3212         struct _s_x *flags, char *p)
3213 {
3214         char *e;
3215         uint32_t set = 0, clear = 0;
3216
3217         if (fill_flags(flags, p, &e, &set, &clear) != 0)
3218                 errx(EX_DATAERR, "invalid flag %s", e);
3219
3220         cmd->opcode = opcode;
3221         cmd->len =  (cmd->len & (F_NOT | F_OR)) | 1;
3222         cmd->arg1 = (set & 0xff) | ( (clear & 0xff) << 8);
3223 }
3224
3225
3226 void
3227 ipfw_delete(char *av[])
3228 {
3229         ipfw_range_tlv rt;
3230         char *sep;
3231         int i, j;
3232         int exitval = EX_OK;
3233         int do_set = 0;
3234
3235         av++;
3236         NEED1("missing rule specification");
3237         if ( *av && _substrcmp(*av, "set") == 0) {
3238                 /* Do not allow using the following syntax:
3239                  *      ipfw set N delete set M
3240                  */
3241                 if (co.use_set)
3242                         errx(EX_DATAERR, "invalid syntax");
3243                 do_set = 1;     /* delete set */
3244                 av++;
3245         }
3246
3247         /* Rule number */
3248         while (*av && isdigit(**av)) {
3249                 i = strtol(*av, &sep, 10);
3250                 j = i;
3251                 if (*sep== '-')
3252                         j = strtol(sep + 1, NULL, 10);
3253                 av++;
3254                 if (co.do_nat) {
3255                         exitval = do_cmd(IP_FW_NAT_DEL, &i, sizeof i);
3256                         if (exitval) {
3257                                 exitval = EX_UNAVAILABLE;
3258                                 warn("rule %u not available", i);
3259                         }
3260                 } else if (co.do_pipe) {
3261                         exitval = ipfw_delete_pipe(co.do_pipe, i);
3262                 } else {
3263                         memset(&rt, 0, sizeof(rt));
3264                         if (do_set != 0) {
3265                                 rt.set = i & 31;
3266                                 rt.flags = IPFW_RCFLAG_SET;
3267                         } else {
3268                                 rt.start_rule = i & 0xffff;
3269                                 rt.end_rule = j & 0xffff;
3270                                 if (rt.start_rule == 0 && rt.end_rule == 0)
3271                                         rt.flags |= IPFW_RCFLAG_ALL;
3272                                 else
3273                                         rt.flags |= IPFW_RCFLAG_RANGE;
3274                                 if (co.use_set != 0) {
3275                                         rt.set = co.use_set - 1;
3276                                         rt.flags |= IPFW_RCFLAG_SET;
3277                                 }
3278                         }
3279                         i = do_range_cmd(IP_FW_XDEL, &rt);
3280                         if (i != 0) {
3281                                 exitval = EX_UNAVAILABLE;
3282                                 warn("rule %u: setsockopt(IP_FW_XDEL)",
3283                                     rt.start_rule);
3284                         } else if (rt.new_set == 0 && do_set == 0) {
3285                                 exitval = EX_UNAVAILABLE;
3286                                 if (rt.start_rule != rt.end_rule)
3287                                         warnx("no rules rules in %u-%u range",
3288                                             rt.start_rule, rt.end_rule);
3289                                 else
3290                                         warnx("rule %u not found",
3291                                             rt.start_rule);
3292                         }
3293                 }
3294         }
3295         if (exitval != EX_OK)
3296                 exit(exitval);
3297 }
3298
3299
3300 /*
3301  * fill the interface structure. We do not check the name as we can
3302  * create interfaces dynamically, so checking them at insert time
3303  * makes relatively little sense.
3304  * Interface names containing '*', '?', or '[' are assumed to be shell
3305  * patterns which match interfaces.
3306  */
3307 static void
3308 fill_iface(ipfw_insn_if *cmd, char *arg, int cblen, struct tidx *tstate)
3309 {
3310         char *p;
3311         uint16_t uidx;
3312
3313         cmd->name[0] = '\0';
3314         cmd->o.len |= F_INSN_SIZE(ipfw_insn_if);
3315
3316         CHECK_CMDLEN;
3317
3318         /* Parse the interface or address */
3319         if (strcmp(arg, "any") == 0)
3320                 cmd->o.len = 0;         /* effectively ignore this command */
3321         else if (strncmp(arg, "table(", 6) == 0) {
3322                 if ((p = strchr(arg + 6, ')')) == NULL)
3323                         errx(EX_DATAERR, "forgotten parenthesis: '%s'", arg);
3324                 *p = '\0';
3325                 p = strchr(arg + 6, ',');
3326                 if (p)
3327                         *p++ = '\0';
3328                 if ((uidx = pack_table(tstate, arg + 6)) == 0)
3329                         errx(EX_DATAERR, "Invalid table name: %s", arg + 6);
3330
3331                 cmd->name[0] = '\1'; /* Special value indicating table */
3332                 cmd->p.kidx = uidx;
3333         } else if (!isdigit(*arg)) {
3334                 strlcpy(cmd->name, arg, sizeof(cmd->name));
3335                 cmd->p.glob = strpbrk(arg, "*?[") != NULL ? 1 : 0;
3336         } else if (!inet_aton(arg, &cmd->p.ip))
3337                 errx(EX_DATAERR, "bad ip address ``%s''", arg);
3338 }
3339
3340 static void
3341 get_mac_addr_mask(const char *p, uint8_t *addr, uint8_t *mask)
3342 {
3343         int i;
3344         size_t l;
3345         char *ap, *ptr, *optr;
3346         struct ether_addr *mac;
3347         const char *macset = "0123456789abcdefABCDEF:";
3348
3349         if (strcmp(p, "any") == 0) {
3350                 for (i = 0; i < ETHER_ADDR_LEN; i++)
3351                         addr[i] = mask[i] = 0;
3352                 return;
3353         }
3354
3355         optr = ptr = strdup(p);
3356         if ((ap = strsep(&ptr, "&/")) != NULL && *ap != 0) {
3357                 l = strlen(ap);
3358                 if (strspn(ap, macset) != l || (mac = ether_aton(ap)) == NULL)
3359                         errx(EX_DATAERR, "Incorrect MAC address");
3360                 bcopy(mac, addr, ETHER_ADDR_LEN);
3361         } else
3362                 errx(EX_DATAERR, "Incorrect MAC address");
3363
3364         if (ptr != NULL) { /* we have mask? */
3365                 if (p[ptr - optr - 1] == '/') { /* mask len */
3366                         long ml = strtol(ptr, &ap, 10);
3367                         if (*ap != 0 || ml > ETHER_ADDR_LEN * 8 || ml < 0)
3368                                 errx(EX_DATAERR, "Incorrect mask length");
3369                         for (i = 0; ml > 0 && i < ETHER_ADDR_LEN; ml -= 8, i++)
3370                                 mask[i] = (ml >= 8) ? 0xff: (~0) << (8 - ml);
3371                 } else { /* mask */
3372                         l = strlen(ptr);
3373                         if (strspn(ptr, macset) != l ||
3374                             (mac = ether_aton(ptr)) == NULL)
3375                                 errx(EX_DATAERR, "Incorrect mask");
3376                         bcopy(mac, mask, ETHER_ADDR_LEN);
3377                 }
3378         } else { /* default mask: ff:ff:ff:ff:ff:ff */
3379                 for (i = 0; i < ETHER_ADDR_LEN; i++)
3380                         mask[i] = 0xff;
3381         }
3382         for (i = 0; i < ETHER_ADDR_LEN; i++)
3383                 addr[i] &= mask[i];
3384
3385         free(optr);
3386 }
3387
3388 /*
3389  * helper function, updates the pointer to cmd with the length
3390  * of the current command, and also cleans up the first word of
3391  * the new command in case it has been clobbered before.
3392  */
3393 static ipfw_insn *
3394 next_cmd(ipfw_insn *cmd, int *len)
3395 {
3396         *len -= F_LEN(cmd);
3397         CHECK_LENGTH(*len, 0);
3398         cmd += F_LEN(cmd);
3399         bzero(cmd, sizeof(*cmd));
3400         return cmd;
3401 }
3402
3403 /*
3404  * Takes arguments and copies them into a comment
3405  */
3406 static void
3407 fill_comment(ipfw_insn *cmd, char **av, int cblen)
3408 {
3409         int i, l;
3410         char *p = (char *)(cmd + 1);
3411
3412         cmd->opcode = O_NOP;
3413         cmd->len =  (cmd->len & (F_NOT | F_OR));
3414
3415         /* Compute length of comment string. */
3416         for (i = 0, l = 0; av[i] != NULL; i++)
3417                 l += strlen(av[i]) + 1;
3418         if (l == 0)
3419                 return;
3420         if (l > 84)
3421                 errx(EX_DATAERR,
3422                     "comment too long (max 80 chars)");
3423         l = 1 + (l+3)/4;
3424         cmd->len =  (cmd->len & (F_NOT | F_OR)) | l;
3425         CHECK_CMDLEN;
3426
3427         for (i = 0; av[i] != NULL; i++) {
3428                 strcpy(p, av[i]);
3429                 p += strlen(av[i]);
3430                 *p++ = ' ';
3431         }
3432         *(--p) = '\0';
3433 }
3434
3435 /*
3436  * A function to fill simple commands of size 1.
3437  * Existing flags are preserved.
3438  */
3439 static void
3440 fill_cmd(ipfw_insn *cmd, enum ipfw_opcodes opcode, int flags, uint16_t arg)
3441 {
3442         cmd->opcode = opcode;
3443         cmd->len =  ((cmd->len | flags) & (F_NOT | F_OR)) | 1;
3444         cmd->arg1 = arg;
3445 }
3446
3447 /*
3448  * Fetch and add the MAC address and type, with masks. This generates one or
3449  * two microinstructions, and returns the pointer to the last one.
3450  */
3451 static ipfw_insn *
3452 add_mac(ipfw_insn *cmd, char *av[], int cblen)
3453 {
3454         ipfw_insn_mac *mac;
3455
3456         if ( ( av[0] == NULL ) || ( av[1] == NULL ) )
3457                 errx(EX_DATAERR, "MAC dst src");
3458
3459         cmd->opcode = O_MACADDR2;
3460         cmd->len = (cmd->len & (F_NOT | F_OR)) | F_INSN_SIZE(ipfw_insn_mac);
3461         CHECK_CMDLEN;
3462
3463         mac = (ipfw_insn_mac *)cmd;
3464         get_mac_addr_mask(av[0], mac->addr, mac->mask); /* dst */
3465         get_mac_addr_mask(av[1], &(mac->addr[ETHER_ADDR_LEN]),
3466             &(mac->mask[ETHER_ADDR_LEN])); /* src */
3467         return cmd;
3468 }
3469
3470 static ipfw_insn *
3471 add_mactype(ipfw_insn *cmd, char *av, int cblen)
3472 {
3473         if (!av)
3474                 errx(EX_DATAERR, "missing MAC type");
3475         if (strcmp(av, "any") != 0) { /* we have a non-null type */
3476                 fill_newports((ipfw_insn_u16 *)cmd, av, IPPROTO_ETHERTYPE,
3477                     cblen);
3478                 cmd->opcode = O_MAC_TYPE;
3479                 return cmd;
3480         } else
3481                 return NULL;
3482 }
3483
3484 static ipfw_insn *
3485 add_proto0(ipfw_insn *cmd, char *av, u_char *protop)
3486 {
3487         struct protoent *pe;
3488         char *ep;
3489         int proto;
3490
3491         proto = strtol(av, &ep, 10);
3492         if (*ep != '\0' || proto <= 0) {
3493                 if ((pe = getprotobyname(av)) == NULL)
3494                         return NULL;
3495                 proto = pe->p_proto;
3496         }
3497
3498         fill_cmd(cmd, O_PROTO, 0, proto);
3499         *protop = proto;
3500         return cmd;
3501 }
3502
3503 static ipfw_insn *
3504 add_proto(ipfw_insn *cmd, char *av, u_char *protop)
3505 {
3506         u_char proto = IPPROTO_IP;
3507
3508         if (_substrcmp(av, "all") == 0 || strcmp(av, "ip") == 0)
3509                 ; /* do not set O_IP4 nor O_IP6 */
3510         else if (strcmp(av, "ip4") == 0)
3511                 /* explicit "just IPv4" rule */
3512                 fill_cmd(cmd, O_IP4, 0, 0);
3513         else if (strcmp(av, "ip6") == 0) {
3514                 /* explicit "just IPv6" rule */
3515                 proto = IPPROTO_IPV6;
3516                 fill_cmd(cmd, O_IP6, 0, 0);
3517         } else
3518                 return add_proto0(cmd, av, protop);
3519
3520         *protop = proto;
3521         return cmd;
3522 }
3523
3524 static ipfw_insn *
3525 add_proto_compat(ipfw_insn *cmd, char *av, u_char *protop)
3526 {
3527         u_char proto = IPPROTO_IP;
3528
3529         if (_substrcmp(av, "all") == 0 || strcmp(av, "ip") == 0)
3530                 ; /* do not set O_IP4 nor O_IP6 */
3531         else if (strcmp(av, "ipv4") == 0 || strcmp(av, "ip4") == 0)
3532                 /* explicit "just IPv4" rule */
3533                 fill_cmd(cmd, O_IP4, 0, 0);
3534         else if (strcmp(av, "ipv6") == 0 || strcmp(av, "ip6") == 0) {
3535                 /* explicit "just IPv6" rule */
3536                 proto = IPPROTO_IPV6;
3537                 fill_cmd(cmd, O_IP6, 0, 0);
3538         } else
3539                 return add_proto0(cmd, av, protop);
3540
3541         *protop = proto;
3542         return cmd;
3543 }
3544
3545 static ipfw_insn *
3546 add_srcip(ipfw_insn *cmd, char *av, int cblen, struct tidx *tstate)
3547 {
3548         fill_ip((ipfw_insn_ip *)cmd, av, cblen, tstate);
3549         if (cmd->opcode == O_IP_DST_SET)                        /* set */
3550                 cmd->opcode = O_IP_SRC_SET;
3551         else if (cmd->opcode == O_IP_DST_LOOKUP)                /* table */
3552                 cmd->opcode = O_IP_SRC_LOOKUP;
3553         else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn))          /* me */
3554                 cmd->opcode = O_IP_SRC_ME;
3555         else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_u32))      /* one IP */
3556                 cmd->opcode = O_IP_SRC;
3557         else                                                    /* addr/mask */
3558                 cmd->opcode = O_IP_SRC_MASK;
3559         return cmd;
3560 }
3561
3562 static ipfw_insn *
3563 add_dstip(ipfw_insn *cmd, char *av, int cblen, struct tidx *tstate)
3564 {
3565         fill_ip((ipfw_insn_ip *)cmd, av, cblen, tstate);
3566         if (cmd->opcode == O_IP_DST_SET)                        /* set */
3567                 ;
3568         else if (cmd->opcode == O_IP_DST_LOOKUP)                /* table */
3569                 ;
3570         else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn))          /* me */
3571                 cmd->opcode = O_IP_DST_ME;
3572         else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_u32))      /* one IP */
3573                 cmd->opcode = O_IP_DST;
3574         else                                                    /* addr/mask */
3575                 cmd->opcode = O_IP_DST_MASK;
3576         return cmd;
3577 }
3578
3579 static struct _s_x f_reserved_keywords[] = {
3580         { "altq",       TOK_OR },
3581         { "//",         TOK_OR },
3582         { "diverted",   TOK_OR },
3583         { "dst-port",   TOK_OR },
3584         { "src-port",   TOK_OR },
3585         { "established",        TOK_OR },
3586         { "keep-state", TOK_OR },
3587         { "frag",       TOK_OR },
3588         { "icmptypes",  TOK_OR },
3589         { "in",         TOK_OR },
3590         { "out",        TOK_OR },
3591         { "ip6",        TOK_OR },
3592         { "any",        TOK_OR },
3593         { "to",         TOK_OR },
3594         { "via",        TOK_OR },
3595         { "{",          TOK_OR },
3596         { NULL, 0 }     /* terminator */
3597 };
3598
3599 static ipfw_insn *
3600 add_ports(ipfw_insn *cmd, char *av, u_char proto, int opcode, int cblen)
3601 {
3602
3603         if (match_token(f_reserved_keywords, av) != -1)
3604                 return (NULL);
3605
3606         if (fill_newports((ipfw_insn_u16 *)cmd, av, proto, cblen)) {
3607                 /* XXX todo: check that we have a protocol with ports */
3608                 cmd->opcode = opcode;
3609                 return cmd;
3610         }
3611         return NULL;
3612 }
3613
3614 static ipfw_insn *
3615 add_src(ipfw_insn *cmd, char *av, u_char proto, int cblen, struct tidx *tstate)
3616 {
3617         struct in6_addr a;
3618         char *host, *ch, buf[INET6_ADDRSTRLEN];
3619         ipfw_insn *ret = NULL;
3620         int len;
3621
3622         /* Copy first address in set if needed */
3623         if ((ch = strpbrk(av, "/,")) != NULL) {
3624                 len = ch - av;
3625                 strlcpy(buf, av, sizeof(buf));
3626                 if (len < sizeof(buf))
3627                         buf[len] = '\0';
3628                 host = buf;
3629         } else
3630                 host = av;
3631
3632         if (proto == IPPROTO_IPV6  || strcmp(av, "me6") == 0 ||
3633             inet_pton(AF_INET6, host, &a) == 1)
3634                 ret = add_srcip6(cmd, av, cblen, tstate);
3635         /* XXX: should check for IPv4, not !IPv6 */
3636         if (ret == NULL && (proto == IPPROTO_IP || strcmp(av, "me") == 0 ||
3637             inet_pton(AF_INET6, host, &a) != 1))
3638                 ret = add_srcip(cmd, av, cblen, tstate);
3639         if (ret == NULL && strcmp(av, "any") != 0)
3640                 ret = cmd;
3641
3642         return ret;
3643 }
3644
3645 static ipfw_insn *
3646 add_dst(ipfw_insn *cmd, char *av, u_char proto, int cblen, struct tidx *tstate)
3647 {
3648         struct in6_addr a;
3649         char *host, *ch, buf[INET6_ADDRSTRLEN];
3650         ipfw_insn *ret = NULL;
3651         int len;
3652
3653         /* Copy first address in set if needed */
3654         if ((ch = strpbrk(av, "/,")) != NULL) {
3655                 len = ch - av;
3656                 strlcpy(buf, av, sizeof(buf));
3657                 if (len < sizeof(buf))
3658                         buf[len] = '\0';
3659                 host = buf;
3660         } else
3661                 host = av;
3662
3663         if (proto == IPPROTO_IPV6  || strcmp(av, "me6") == 0 ||
3664             inet_pton(AF_INET6, host, &a) == 1)
3665                 ret = add_dstip6(cmd, av, cblen, tstate);
3666         /* XXX: should check for IPv4, not !IPv6 */
3667         if (ret == NULL && (proto == IPPROTO_IP || strcmp(av, "me") == 0 ||
3668             inet_pton(AF_INET6, host, &a) != 1))
3669                 ret = add_dstip(cmd, av, cblen, tstate);
3670         if (ret == NULL && strcmp(av, "any") != 0)
3671                 ret = cmd;
3672
3673         return ret;
3674 }
3675
3676 /*
3677  * Parse arguments and assemble the microinstructions which make up a rule.
3678  * Rules are added into the 'rulebuf' and then copied in the correct order
3679  * into the actual rule.
3680  *
3681  * The syntax for a rule starts with the action, followed by
3682  * optional action parameters, and the various match patterns.
3683  * In the assembled microcode, the first opcode must be an O_PROBE_STATE
3684  * (generated if the rule includes a keep-state option), then the
3685  * various match patterns, log/altq actions, and the actual action.
3686  *
3687  */
3688 void
3689 compile_rule(char *av[], uint32_t *rbuf, int *rbufsize, struct tidx *tstate)
3690 {
3691         /*
3692          * rules are added into the 'rulebuf' and then copied in
3693          * the correct order into the actual rule.
3694          * Some things that need to go out of order (prob, action etc.)
3695          * go into actbuf[].
3696          */
3697         static uint32_t actbuf[255], cmdbuf[255];
3698         int rblen, ablen, cblen;
3699
3700         ipfw_insn *src, *dst, *cmd, *action, *prev=NULL;
3701         ipfw_insn *first_cmd;   /* first match pattern */
3702
3703         struct ip_fw_rule *rule;
3704
3705         /*
3706          * various flags used to record that we entered some fields.
3707          */
3708         ipfw_insn *have_state = NULL;   /* check-state or keep-state */
3709         ipfw_insn *have_log = NULL, *have_altq = NULL, *have_tag = NULL;
3710         size_t len;
3711
3712         int i;
3713
3714         int open_par = 0;       /* open parenthesis ( */
3715
3716         /* proto is here because it is used to fetch ports */
3717         u_char proto = IPPROTO_IP;      /* default protocol */
3718
3719         double match_prob = 1; /* match probability, default is always match */
3720
3721         bzero(actbuf, sizeof(actbuf));          /* actions go here */
3722         bzero(cmdbuf, sizeof(cmdbuf));
3723         bzero(rbuf, *rbufsize);
3724
3725         rule = (struct ip_fw_rule *)rbuf;
3726         cmd = (ipfw_insn *)cmdbuf;
3727         action = (ipfw_insn *)actbuf;
3728
3729         rblen = *rbufsize / sizeof(uint32_t);
3730         rblen -= sizeof(struct ip_fw_rule) / sizeof(uint32_t);
3731         ablen = sizeof(actbuf) / sizeof(actbuf[0]);
3732         cblen = sizeof(cmdbuf) / sizeof(cmdbuf[0]);
3733         cblen -= F_INSN_SIZE(ipfw_insn_u32) + 1;
3734
3735 #define CHECK_RBUFLEN(len)      { CHECK_LENGTH(rblen, len); rblen -= len; }
3736 #define CHECK_ACTLEN            CHECK_LENGTH(ablen, action->len)
3737
3738         av++;
3739
3740         /* [rule N]     -- Rule number optional */
3741         if (av[0] && isdigit(**av)) {
3742                 rule->rulenum = atoi(*av);
3743                 av++;
3744         }
3745
3746         /* [set N]      -- set number (0..RESVD_SET), optional */
3747         if (av[0] && av[1] && _substrcmp(*av, "set") == 0) {
3748                 int set = strtoul(av[1], NULL, 10);
3749                 if (set < 0 || set > RESVD_SET)
3750                         errx(EX_DATAERR, "illegal set %s", av[1]);
3751                 rule->set = set;
3752                 tstate->set = set;
3753                 av += 2;
3754         }
3755
3756         /* [prob D]     -- match probability, optional */
3757         if (av[0] && av[1] && _substrcmp(*av, "prob") == 0) {
3758                 match_prob = strtod(av[1], NULL);
3759
3760                 if (match_prob <= 0 || match_prob > 1)
3761                         errx(EX_DATAERR, "illegal match prob. %s", av[1]);
3762                 av += 2;
3763         }
3764
3765         /* action       -- mandatory */
3766         NEED1("missing action");
3767         i = match_token(rule_actions, *av);
3768         av++;
3769         action->len = 1;        /* default */
3770         CHECK_ACTLEN;
3771         switch(i) {
3772         case TOK_CHECKSTATE:
3773                 have_state = action;
3774                 action->opcode = O_CHECK_STATE;
3775                 if (*av == NULL ||
3776                     match_token(rule_options, *av) == TOK_COMMENT) {
3777                         action->arg1 = pack_object(tstate,
3778                             default_state_name, IPFW_TLV_STATE_NAME);
3779                         break;
3780                 }
3781                 if (*av[0] == ':') {
3782                         if (strcmp(*av + 1, "any") == 0)
3783                                 action->arg1 = 0;
3784                         else if (state_check_name(*av + 1) == 0)
3785                                 action->arg1 = pack_object(tstate, *av + 1,
3786                                     IPFW_TLV_STATE_NAME);
3787                         else
3788                                 errx(EX_DATAERR, "Invalid state name %s",
3789                                     *av);
3790                         av++;
3791                         break;
3792                 }
3793                 errx(EX_DATAERR, "Invalid state name %s", *av);
3794                 break;
3795
3796         case TOK_ABORT:
3797                 action->opcode = O_REJECT;
3798                 action->arg1 = ICMP_REJECT_ABORT;
3799                 break;
3800
3801         case TOK_ABORT6:
3802                 action->opcode = O_UNREACH6;
3803                 action->arg1 = ICMP6_UNREACH_ABORT;
3804                 break;
3805
3806         case TOK_ACCEPT:
3807                 action->opcode = O_ACCEPT;
3808                 break;
3809
3810         case TOK_DENY:
3811                 action->opcode = O_DENY;
3812                 action->arg1 = 0;
3813                 break;
3814
3815         case TOK_REJECT:
3816                 action->opcode = O_REJECT;
3817                 action->arg1 = ICMP_UNREACH_HOST;
3818                 break;
3819
3820         case TOK_RESET:
3821                 action->opcode = O_REJECT;
3822                 action->arg1 = ICMP_REJECT_RST;
3823                 break;
3824
3825         case TOK_RESET6:
3826                 action->opcode = O_UNREACH6;
3827                 action->arg1 = ICMP6_UNREACH_RST;
3828                 break;
3829
3830         case TOK_UNREACH:
3831                 action->opcode = O_REJECT;
3832                 NEED1("missing reject code");
3833                 fill_reject_code(&action->arg1, *av);
3834                 av++;
3835                 break;
3836
3837         case TOK_UNREACH6:
3838                 action->opcode = O_UNREACH6;
3839                 NEED1("missing unreach code");
3840                 fill_unreach6_code(&action->arg1, *av);
3841                 av++;
3842                 break;
3843
3844         case TOK_COUNT:
3845                 action->opcode = O_COUNT;
3846                 break;
3847
3848         case TOK_NAT:
3849                 action->opcode = O_NAT;
3850                 action->len = F_INSN_SIZE(ipfw_insn_nat);
3851                 CHECK_ACTLEN;
3852                 if (*av != NULL && _substrcmp(*av, "global") == 0) {
3853                         action->arg1 = IP_FW_NAT44_GLOBAL;
3854                         av++;
3855                         break;
3856                 } else
3857                         goto chkarg;
3858         case TOK_QUEUE:
3859                 action->opcode = O_QUEUE;
3860                 goto chkarg;
3861         case TOK_PIPE:
3862                 action->opcode = O_PIPE;
3863                 goto chkarg;
3864         case TOK_SKIPTO:
3865                 action->opcode = O_SKIPTO;
3866                 goto chkarg;
3867         case TOK_NETGRAPH:
3868                 action->opcode = O_NETGRAPH;
3869                 goto chkarg;
3870         case TOK_NGTEE:
3871                 action->opcode = O_NGTEE;
3872                 goto chkarg;
3873         case TOK_DIVERT:
3874                 action->opcode = O_DIVERT;
3875                 goto chkarg;
3876         case TOK_TEE:
3877                 action->opcode = O_TEE;
3878                 goto chkarg;
3879         case TOK_CALL:
3880                 action->opcode = O_CALLRETURN;
3881 chkarg:
3882                 if (!av[0])
3883                         errx(EX_USAGE, "missing argument for %s", *(av - 1));
3884                 if (isdigit(**av)) {
3885                         action->arg1 = strtoul(*av, NULL, 10);
3886                         if (action->arg1 <= 0 || action->arg1 >= IP_FW_TABLEARG)
3887                                 errx(EX_DATAERR, "illegal argument for %s",
3888                                     *(av - 1));
3889                 } else if (_substrcmp(*av, "tablearg") == 0) {
3890                         action->arg1 = IP_FW_TARG;
3891                 } else if (i == TOK_DIVERT || i == TOK_TEE) {
3892                         struct servent *s;
3893                         setservent(1);
3894                         s = getservbyname(av[0], "divert");
3895                         if (s != NULL)
3896                                 action->arg1 = ntohs(s->s_port);
3897                         else
3898                                 errx(EX_DATAERR, "illegal divert/tee port");
3899                 } else
3900                         errx(EX_DATAERR, "illegal argument for %s", *(av - 1));
3901                 av++;
3902                 break;
3903
3904         case TOK_FORWARD: {
3905                 /*
3906                  * Locate the address-port separator (':' or ',').
3907                  * Could be one of the following:
3908                  *      hostname:port
3909                  *      IPv4 a.b.c.d,port
3910                  *      IPv4 a.b.c.d:port
3911                  *      IPv6 w:x:y::z,port
3912                  * The ':' can only be used with hostname and IPv4 address.
3913                  * XXX-BZ Should we also support [w:x:y::z]:port?
3914                  */
3915                 struct sockaddr_storage result;
3916                 struct addrinfo *res;
3917                 char *s, *end;
3918                 int family;
3919                 u_short port_number;
3920
3921                 NEED1("missing forward address[:port]");
3922
3923                 /*
3924                  * locate the address-port separator (':' or ',')
3925                  */
3926                 s = strchr(*av, ',');
3927                 if (s == NULL) {
3928                         /* Distinguish between IPv4:port and IPv6 cases. */
3929                         s = strchr(*av, ':');
3930                         if (s && strchr(s+1, ':'))
3931                                 s = NULL; /* no port */
3932                 }
3933
3934                 port_number = 0;
3935                 if (s != NULL) {
3936                         /* Terminate host portion and set s to start of port. */
3937                         *(s++) = '\0';
3938                         i = strtoport(s, &end, 0 /* base */, 0 /* proto */);
3939                         if (s == end)
3940                                 errx(EX_DATAERR,
3941                                     "illegal forwarding port ``%s''", s);
3942                         port_number = (u_short)i;
3943                 }
3944
3945                 if (_substrcmp(*av, "tablearg") == 0) {
3946                         family = PF_INET;
3947                         ((struct sockaddr_in*)&result)->sin_addr.s_addr =
3948                             INADDR_ANY;
3949                 } else {
3950                         /*
3951                          * Resolve the host name or address to a family and a
3952                          * network representation of the address.
3953                          */
3954                         if (getaddrinfo(*av, NULL, NULL, &res))
3955                                 errx(EX_DATAERR, NULL);
3956                         /* Just use the first host in the answer. */
3957                         family = res->ai_family;
3958                         memcpy(&result, res->ai_addr, res->ai_addrlen);
3959                         freeaddrinfo(res);
3960                 }
3961
3962                 if (family == PF_INET) {
3963                         ipfw_insn_sa *p = (ipfw_insn_sa *)action;
3964
3965                         action->opcode = O_FORWARD_IP;
3966                         action->len = F_INSN_SIZE(ipfw_insn_sa);
3967                         CHECK_ACTLEN;
3968
3969                         /*
3970                          * In the kernel we assume AF_INET and use only
3971                          * sin_port and sin_addr. Remember to set sin_len as
3972                          * the routing code seems to use it too.
3973                          */
3974                         p->sa.sin_len = sizeof(struct sockaddr_in);
3975                         p->sa.sin_family = AF_INET;
3976                         p->sa.sin_port = port_number;
3977                         p->sa.sin_addr.s_addr =
3978                              ((struct sockaddr_in *)&result)->sin_addr.s_addr;
3979                 } else if (family == PF_INET6) {
3980                         ipfw_insn_sa6 *p = (ipfw_insn_sa6 *)action;
3981
3982                         action->opcode = O_FORWARD_IP6;
3983                         action->len = F_INSN_SIZE(ipfw_insn_sa6);
3984                         CHECK_ACTLEN;
3985
3986                         p->sa.sin6_len = sizeof(struct sockaddr_in6);
3987                         p->sa.sin6_family = AF_INET6;
3988                         p->sa.sin6_port = port_number;
3989                         p->sa.sin6_flowinfo = 0;
3990                         p->sa.sin6_scope_id =
3991                             ((struct sockaddr_in6 *)&result)->sin6_scope_id;
3992                         bcopy(&((struct sockaddr_in6*)&result)->sin6_addr,
3993                             &p->sa.sin6_addr, sizeof(p->sa.sin6_addr));
3994                 } else {
3995                         errx(EX_DATAERR, "Invalid address family in forward action");
3996                 }
3997                 av++;
3998                 break;
3999             }
4000         case TOK_COMMENT:
4001                 /* pretend it is a 'count' rule followed by the comment */
4002                 action->opcode = O_COUNT;
4003                 av--;           /* go back... */
4004                 break;
4005
4006         case TOK_SETFIB:
4007             {
4008                 int numfibs;
4009                 size_t intsize = sizeof(int);
4010
4011                 action->opcode = O_SETFIB;
4012                 NEED1("missing fib number");
4013                 if (_substrcmp(*av, "tablearg") == 0) {
4014                         action->arg1 = IP_FW_TARG;
4015                 } else {
4016                         action->arg1 = strtoul(*av, NULL, 10);
4017                         if (sysctlbyname("net.fibs", &numfibs, &intsize,
4018                             NULL, 0) == -1)
4019                                 errx(EX_DATAERR, "fibs not suported.\n");
4020                         if (action->arg1 >= numfibs)  /* Temporary */
4021                                 errx(EX_DATAERR, "fib too large.\n");
4022                         /* Add high-order bit to fib to make room for tablearg*/
4023                         action->arg1 |= 0x8000;
4024                 }
4025                 av++;
4026                 break;
4027             }
4028
4029         case TOK_SETDSCP:
4030             {
4031                 int code;
4032
4033                 action->opcode = O_SETDSCP;
4034                 NEED1("missing DSCP code");
4035                 if (_substrcmp(*av, "tablearg") == 0) {
4036                         action->arg1 = IP_FW_TARG;
4037                 } else {
4038                         if (isalpha(*av[0])) {
4039                                 if ((code = match_token(f_ipdscp, *av)) == -1)
4040                                         errx(EX_DATAERR, "Unknown DSCP code");
4041                                 action->arg1 = code;
4042                         } else
4043                                 action->arg1 = strtoul(*av, NULL, 10);
4044                         /*
4045                          * Add high-order bit to DSCP to make room
4046                          * for tablearg
4047                          */
4048                         action->arg1 |= 0x8000;
4049                 }
4050                 av++;
4051                 break;
4052             }
4053
4054         case TOK_REASS:
4055                 action->opcode = O_REASS;
4056                 break;
4057
4058         case TOK_RETURN:
4059                 fill_cmd(action, O_CALLRETURN, F_NOT, 0);
4060                 break;
4061
4062         case TOK_TCPSETMSS: {
4063                 u_long mss;
4064                 uint16_t idx;
4065
4066                 idx = pack_object(tstate, "tcp-setmss", IPFW_TLV_EACTION);
4067                 if (idx == 0)
4068                         errx(EX_DATAERR, "pack_object failed");
4069                 fill_cmd(action, O_EXTERNAL_ACTION, 0, idx);
4070                 NEED1("Missing MSS value");
4071                 action = next_cmd(action, &ablen);
4072                 action->len = 1;
4073                 CHECK_ACTLEN;
4074                 mss = strtoul(*av, NULL, 10);
4075                 if (mss == 0 || mss > UINT16_MAX)
4076                         errx(EX_USAGE, "invalid MSS value %s", *av);
4077                 fill_cmd(action, O_EXTERNAL_DATA, 0, (uint16_t)mss);
4078                 av++;
4079                 break;
4080         }
4081
4082         default:
4083                 av--;
4084                 if (match_token(rule_eactions, *av) == -1)
4085                         errx(EX_DATAERR, "invalid action %s\n", *av);
4086                 /*
4087                  * External actions support.
4088                  * XXX: we support only syntax with instance name.
4089                  *      For known external actions (from rule_eactions list)
4090                  *      we can handle syntax directly. But with `eaction'
4091                  *      keyword we can use only `eaction <name> <instance>'
4092                  *      syntax.
4093                  */
4094         case TOK_EACTION: {
4095                 uint16_t idx;
4096
4097                 NEED1("Missing eaction name");
4098                 if (eaction_check_name(*av) != 0)
4099                         errx(EX_DATAERR, "Invalid eaction name %s", *av);
4100                 idx = pack_object(tstate, *av, IPFW_TLV_EACTION);
4101                 if (idx == 0)
4102                         errx(EX_DATAERR, "pack_object failed");
4103                 fill_cmd(action, O_EXTERNAL_ACTION, 0, idx);
4104                 av++;
4105                 NEED1("Missing eaction instance name");
4106                 action = next_cmd(action, &ablen);
4107                 action->len = 1;
4108                 CHECK_ACTLEN;
4109                 if (eaction_check_name(*av) != 0)
4110                         errx(EX_DATAERR, "Invalid eaction instance name %s",
4111                             *av);
4112                 /*
4113                  * External action instance object has TLV type depended
4114                  * from the external action name object index. Since we
4115                  * currently don't know this index, use zero as TLV type.
4116                  */
4117                 idx = pack_object(tstate, *av, 0);
4118                 if (idx == 0)
4119                         errx(EX_DATAERR, "pack_object failed");
4120                 fill_cmd(action, O_EXTERNAL_INSTANCE, 0, idx);
4121                 av++;
4122                 }
4123         }
4124         action = next_cmd(action, &ablen);
4125
4126         /*
4127          * [altq queuename] -- altq tag, optional
4128          * [log [logamount N]]  -- log, optional
4129          *
4130          * If they exist, it go first in the cmdbuf, but then it is
4131          * skipped in the copy section to the end of the buffer.
4132          */
4133         while (av[0] != NULL && (i = match_token(rule_action_params, *av)) != -1) {
4134                 av++;
4135                 switch (i) {
4136                 case TOK_LOG:
4137                     {
4138                         ipfw_insn_log *c = (ipfw_insn_log *)cmd;
4139                         int l;
4140
4141                         if (have_log)
4142                                 errx(EX_DATAERR,
4143                                     "log cannot be specified more than once");
4144                         have_log = (ipfw_insn *)c;
4145                         cmd->len = F_INSN_SIZE(ipfw_insn_log);
4146                         CHECK_CMDLEN;
4147                         cmd->opcode = O_LOG;
4148                         if (av[0] && _substrcmp(*av, "logamount") == 0) {
4149                                 av++;
4150                                 NEED1("logamount requires argument");
4151                                 l = atoi(*av);
4152                                 if (l < 0)
4153                                         errx(EX_DATAERR,
4154                                             "logamount must be positive");
4155                                 c->max_log = l;
4156                                 av++;
4157                         } else {
4158                                 len = sizeof(c->max_log);
4159                                 if (sysctlbyname("net.inet.ip.fw.verbose_limit",
4160                                     &c->max_log, &len, NULL, 0) == -1) {
4161                                         if (co.test_only) {
4162                                                 c->max_log = 0;
4163                                                 break;
4164                                         }
4165                                         errx(1, "sysctlbyname(\"%s\")",
4166                                             "net.inet.ip.fw.verbose_limit");
4167                                 }
4168                         }
4169                     }
4170                         break;
4171
4172 #ifndef NO_ALTQ
4173                 case TOK_ALTQ:
4174                     {
4175                         ipfw_insn_altq *a = (ipfw_insn_altq *)cmd;
4176
4177                         NEED1("missing altq queue name");
4178                         if (have_altq)
4179                                 errx(EX_DATAERR,
4180                                     "altq cannot be specified more than once");
4181                         have_altq = (ipfw_insn *)a;
4182                         cmd->len = F_INSN_SIZE(ipfw_insn_altq);
4183                         CHECK_CMDLEN;
4184                         cmd->opcode = O_ALTQ;
4185                         a->qid = altq_name_to_qid(*av);
4186                         av++;
4187                     }
4188                         break;
4189 #endif
4190
4191                 case TOK_TAG:
4192                 case TOK_UNTAG: {
4193                         uint16_t tag;
4194
4195                         if (have_tag)
4196                                 errx(EX_USAGE, "tag and untag cannot be "
4197                                     "specified more than once");
4198                         GET_UINT_ARG(tag, IPFW_ARG_MIN, IPFW_ARG_MAX, i,
4199                            rule_action_params);
4200                         have_tag = cmd;
4201                         fill_cmd(cmd, O_TAG, (i == TOK_TAG) ? 0: F_NOT, tag);
4202                         av++;
4203                         break;
4204                 }
4205
4206                 default:
4207                         abort();
4208                 }
4209                 cmd = next_cmd(cmd, &cblen);
4210         }
4211
4212         if (have_state) { /* must be a check-state, we are done */
4213                 if (*av != NULL &&
4214                     match_token(rule_options, *av) == TOK_COMMENT) {
4215                         /* check-state has a comment */
4216                         av++;
4217                         fill_comment(cmd, av, cblen);
4218                         cmd = next_cmd(cmd, &cblen);
4219                         av[0] = NULL;
4220                 }
4221                 goto done;
4222         }
4223
4224 #define OR_START(target)                                        \
4225         if (av[0] && (*av[0] == '(' || *av[0] == '{')) {        \
4226                 if (open_par)                                   \
4227                         errx(EX_USAGE, "nested \"(\" not allowed\n"); \
4228                 prev = NULL;                                    \
4229                 open_par = 1;                                   \
4230                 if ( (av[0])[1] == '\0') {                      \
4231                         av++;                                   \
4232                 } else                                          \
4233                         (*av)++;                                \
4234         }                                                       \
4235         target:                                                 \
4236
4237
4238 #define CLOSE_PAR                                               \
4239         if (open_par) {                                         \
4240                 if (av[0] && (                                  \
4241                     strcmp(*av, ")") == 0 ||                    \
4242                     strcmp(*av, "}") == 0)) {                   \
4243                         prev = NULL;                            \
4244                         open_par = 0;                           \
4245                         av++;                                   \
4246                 } else                                          \
4247                         errx(EX_USAGE, "missing \")\"\n");      \
4248         }
4249
4250 #define NOT_BLOCK                                               \
4251         if (av[0] && _substrcmp(*av, "not") == 0) {             \
4252                 if (cmd->len & F_NOT)                           \
4253                         errx(EX_USAGE, "double \"not\" not allowed\n"); \
4254                 cmd->len |= F_NOT;                              \
4255                 av++;                                           \
4256         }
4257
4258 #define OR_BLOCK(target)                                        \
4259         if (av[0] && _substrcmp(*av, "or") == 0) {              \
4260                 if (prev == NULL || open_par == 0)              \
4261                         errx(EX_DATAERR, "invalid OR block");   \
4262                 prev->len |= F_OR;                              \
4263                 av++;                                   \
4264                 goto target;                                    \
4265         }                                                       \
4266         CLOSE_PAR;
4267
4268         first_cmd = cmd;
4269
4270 #if 0
4271         /*
4272          * MAC addresses, optional.
4273          * If we have this, we skip the part "proto from src to dst"
4274          * and jump straight to the option parsing.
4275          */
4276         NOT_BLOCK;
4277         NEED1("missing protocol");
4278         if (_substrcmp(*av, "MAC") == 0 ||
4279             _substrcmp(*av, "mac") == 0) {
4280                 av++;                   /* the "MAC" keyword */
4281                 add_mac(cmd, av);       /* exits in case of errors */
4282                 cmd = next_cmd(cmd);
4283                 av += 2;                /* dst-mac and src-mac */
4284                 NOT_BLOCK;
4285                 NEED1("missing mac type");
4286                 if (add_mactype(cmd, av[0]))
4287                         cmd = next_cmd(cmd);
4288                 av++;                   /* any or mac-type */
4289                 goto read_options;
4290         }
4291 #endif
4292
4293         /*
4294          * protocol, mandatory
4295          */
4296     OR_START(get_proto);
4297         NOT_BLOCK;
4298         NEED1("missing protocol");
4299         if (add_proto_compat(cmd, *av, &proto)) {
4300                 av++;
4301                 if (F_LEN(cmd) != 0) {
4302                         prev = cmd;
4303                         cmd = next_cmd(cmd, &cblen);
4304                 }
4305         } else if (first_cmd != cmd) {
4306                 errx(EX_DATAERR, "invalid protocol ``%s''", *av);
4307         } else
4308                 goto read_options;
4309     OR_BLOCK(get_proto);
4310
4311         /*
4312          * "from", mandatory
4313          */
4314         if ((av[0] == NULL) || _substrcmp(*av, "from") != 0)
4315                 errx(EX_USAGE, "missing ``from''");
4316         av++;
4317
4318         /*
4319          * source IP, mandatory
4320          */
4321     OR_START(source_ip);
4322         NOT_BLOCK;      /* optional "not" */
4323         NEED1("missing source address");
4324         if (add_src(cmd, *av, proto, cblen, tstate)) {
4325                 av++;
4326                 if (F_LEN(cmd) != 0) {  /* ! any */
4327                         prev = cmd;
4328                         cmd = next_cmd(cmd, &cblen);
4329                 }
4330         } else
4331                 errx(EX_USAGE, "bad source address %s", *av);
4332     OR_BLOCK(source_ip);
4333
4334         /*
4335          * source ports, optional
4336          */
4337         NOT_BLOCK;      /* optional "not" */
4338         if ( av[0] != NULL ) {
4339                 if (_substrcmp(*av, "any") == 0 ||
4340                     add_ports(cmd, *av, proto, O_IP_SRCPORT, cblen)) {
4341                         av++;
4342                         if (F_LEN(cmd) != 0)
4343                                 cmd = next_cmd(cmd, &cblen);
4344                 }
4345         }
4346
4347         /*
4348          * "to", mandatory
4349          */
4350         if ( (av[0] == NULL) || _substrcmp(*av, "to") != 0 )
4351                 errx(EX_USAGE, "missing ``to''");
4352         av++;
4353
4354         /*
4355          * destination, mandatory
4356          */
4357     OR_START(dest_ip);
4358         NOT_BLOCK;      /* optional "not" */
4359         NEED1("missing dst address");
4360         if (add_dst(cmd, *av, proto, cblen, tstate)) {
4361                 av++;
4362                 if (F_LEN(cmd) != 0) {  /* ! any */
4363                         prev = cmd;
4364                         cmd = next_cmd(cmd, &cblen);
4365                 }
4366         } else
4367                 errx( EX_USAGE, "bad destination address %s", *av);
4368     OR_BLOCK(dest_ip);
4369
4370         /*
4371          * dest. ports, optional
4372          */
4373         NOT_BLOCK;      /* optional "not" */
4374         if (av[0]) {
4375                 if (_substrcmp(*av, "any") == 0 ||
4376                     add_ports(cmd, *av, proto, O_IP_DSTPORT, cblen)) {
4377                         av++;
4378                         if (F_LEN(cmd) != 0)
4379                                 cmd = next_cmd(cmd, &cblen);
4380                 }
4381         }
4382
4383 read_options:
4384         prev = NULL;
4385         while ( av[0] != NULL ) {
4386                 char *s;
4387                 ipfw_insn_u32 *cmd32;   /* alias for cmd */
4388
4389                 s = *av;
4390                 cmd32 = (ipfw_insn_u32 *)cmd;
4391
4392                 if (*s == '!') {        /* alternate syntax for NOT */
4393                         if (cmd->len & F_NOT)
4394                                 errx(EX_USAGE, "double \"not\" not allowed\n");
4395                         cmd->len = F_NOT;
4396                         s++;
4397                 }
4398                 i = match_token(rule_options, s);
4399                 av++;
4400                 switch(i) {
4401                 case TOK_NOT:
4402                         if (cmd->len & F_NOT)
4403                                 errx(EX_USAGE, "double \"not\" not allowed\n");
4404                         cmd->len = F_NOT;
4405                         break;
4406
4407                 case TOK_OR:
4408                         if (open_par == 0 || prev == NULL)
4409                                 errx(EX_USAGE, "invalid \"or\" block\n");
4410                         prev->len |= F_OR;
4411                         break;
4412
4413                 case TOK_STARTBRACE:
4414                         if (open_par)
4415                                 errx(EX_USAGE, "+nested \"(\" not allowed\n");
4416                         open_par = 1;
4417                         break;
4418
4419                 case TOK_ENDBRACE:
4420                         if (!open_par)
4421                                 errx(EX_USAGE, "+missing \")\"\n");
4422                         open_par = 0;
4423                         prev = NULL;
4424                         break;
4425
4426                 case TOK_IN:
4427                         fill_cmd(cmd, O_IN, 0, 0);
4428                         break;
4429
4430                 case TOK_OUT:
4431                         cmd->len ^= F_NOT; /* toggle F_NOT */
4432                         fill_cmd(cmd, O_IN, 0, 0);
4433                         break;
4434
4435                 case TOK_DIVERTED:
4436                         fill_cmd(cmd, O_DIVERTED, 0, 3);
4437                         break;
4438
4439                 case TOK_DIVERTEDLOOPBACK:
4440                         fill_cmd(cmd, O_DIVERTED, 0, 1);
4441                         break;
4442
4443                 case TOK_DIVERTEDOUTPUT:
4444                         fill_cmd(cmd, O_DIVERTED, 0, 2);
4445                         break;
4446
4447                 case TOK_FRAG:
4448                         fill_cmd(cmd, O_FRAG, 0, 0);
4449                         break;
4450
4451                 case TOK_LAYER2:
4452                         fill_cmd(cmd, O_LAYER2, 0, 0);
4453                         break;
4454
4455                 case TOK_XMIT:
4456                 case TOK_RECV:
4457                 case TOK_VIA:
4458                         NEED1("recv, xmit, via require interface name"
4459                                 " or address");
4460                         fill_iface((ipfw_insn_if *)cmd, av[0], cblen, tstate);
4461                         av++;
4462                         if (F_LEN(cmd) == 0)    /* not a valid address */
4463                                 break;
4464                         if (i == TOK_XMIT)
4465                                 cmd->opcode = O_XMIT;
4466                         else if (i == TOK_RECV)
4467                                 cmd->opcode = O_RECV;
4468                         else if (i == TOK_VIA)
4469                                 cmd->opcode = O_VIA;
4470                         break;
4471
4472                 case TOK_ICMPTYPES:
4473                         NEED1("icmptypes requires list of types");
4474                         fill_icmptypes((ipfw_insn_u32 *)cmd, *av);
4475                         av++;
4476                         break;
4477
4478                 case TOK_ICMP6TYPES:
4479                         NEED1("icmptypes requires list of types");
4480                         fill_icmp6types((ipfw_insn_icmp6 *)cmd, *av, cblen);
4481                         av++;
4482                         break;
4483
4484                 case TOK_IPTTL:
4485                         NEED1("ipttl requires TTL");
4486                         if (strpbrk(*av, "-,")) {
4487                             if (!add_ports(cmd, *av, 0, O_IPTTL, cblen))
4488                                 errx(EX_DATAERR, "invalid ipttl %s", *av);
4489                         } else
4490                             fill_cmd(cmd, O_IPTTL, 0, strtoul(*av, NULL, 0));
4491                         av++;
4492                         break;
4493
4494                 case TOK_IPID:
4495                         NEED1("ipid requires id");
4496                         if (strpbrk(*av, "-,")) {
4497                             if (!add_ports(cmd, *av, 0, O_IPID, cblen))
4498                                 errx(EX_DATAERR, "invalid ipid %s", *av);
4499                         } else
4500                             fill_cmd(cmd, O_IPID, 0, strtoul(*av, NULL, 0));
4501                         av++;
4502                         break;
4503
4504                 case TOK_IPLEN:
4505                         NEED1("iplen requires length");
4506                         if (strpbrk(*av, "-,")) {
4507                             if (!add_ports(cmd, *av, 0, O_IPLEN, cblen))
4508                                 errx(EX_DATAERR, "invalid ip len %s", *av);
4509                         } else
4510                             fill_cmd(cmd, O_IPLEN, 0, strtoul(*av, NULL, 0));
4511                         av++;
4512                         break;
4513
4514                 case TOK_IPVER:
4515                         NEED1("ipver requires version");
4516                         fill_cmd(cmd, O_IPVER, 0, strtoul(*av, NULL, 0));
4517                         av++;
4518                         break;
4519
4520                 case TOK_IPPRECEDENCE:
4521                         NEED1("ipprecedence requires value");
4522                         fill_cmd(cmd, O_IPPRECEDENCE, 0,
4523                             (strtoul(*av, NULL, 0) & 7) << 5);
4524                         av++;
4525                         break;
4526
4527                 case TOK_DSCP:
4528                         NEED1("missing DSCP code");
4529                         fill_dscp(cmd, *av, cblen);
4530                         av++;
4531                         break;
4532
4533                 case TOK_IPOPTS:
4534                         NEED1("missing argument for ipoptions");
4535                         fill_flags_cmd(cmd, O_IPOPT, f_ipopts, *av);
4536                         av++;
4537                         break;
4538
4539                 case TOK_IPTOS:
4540                         NEED1("missing argument for iptos");
4541                         fill_flags_cmd(cmd, O_IPTOS, f_iptos, *av);
4542                         av++;
4543                         break;
4544
4545                 case TOK_UID:
4546                         NEED1("uid requires argument");
4547                     {
4548                         char *end;
4549                         uid_t uid;
4550                         struct passwd *pwd;
4551
4552                         cmd->opcode = O_UID;
4553                         uid = strtoul(*av, &end, 0);
4554                         pwd = (*end == '\0') ? getpwuid(uid) : getpwnam(*av);
4555                         if (pwd == NULL)
4556                                 errx(EX_DATAERR, "uid \"%s\" nonexistent", *av);
4557                         cmd32->d[0] = pwd->pw_uid;
4558                         cmd->len |= F_INSN_SIZE(ipfw_insn_u32);
4559                         av++;
4560                     }
4561                         break;
4562
4563                 case TOK_GID:
4564                         NEED1("gid requires argument");
4565                     {
4566                         char *end;
4567                         gid_t gid;
4568                         struct group *grp;
4569
4570                         cmd->opcode = O_GID;
4571                         gid = strtoul(*av, &end, 0);
4572                         grp = (*end == '\0') ? getgrgid(gid) : getgrnam(*av);
4573                         if (grp == NULL)
4574                                 errx(EX_DATAERR, "gid \"%s\" nonexistent", *av);
4575                         cmd32->d[0] = grp->gr_gid;
4576                         cmd->len |= F_INSN_SIZE(ipfw_insn_u32);
4577                         av++;
4578                     }
4579                         break;
4580
4581                 case TOK_JAIL:
4582                         NEED1("jail requires argument");
4583                     {
4584                         char *end;
4585                         int jid;
4586
4587                         cmd->opcode = O_JAIL;
4588                         jid = (int)strtol(*av, &end, 0);
4589                         if (jid < 0 || *end != '\0')
4590                                 errx(EX_DATAERR, "jail requires prison ID");
4591                         cmd32->d[0] = (uint32_t)jid;
4592                         cmd->len |= F_INSN_SIZE(ipfw_insn_u32);
4593                         av++;
4594                     }
4595                         break;
4596
4597                 case TOK_ESTAB:
4598                         fill_cmd(cmd, O_ESTAB, 0, 0);
4599                         break;
4600
4601                 case TOK_SETUP:
4602                         fill_cmd(cmd, O_TCPFLAGS, 0,
4603                                 (TH_SYN) | ( (TH_ACK) & 0xff) <<8 );
4604                         break;
4605
4606                 case TOK_TCPDATALEN:
4607                         NEED1("tcpdatalen requires length");
4608                         if (strpbrk(*av, "-,")) {
4609                             if (!add_ports(cmd, *av, 0, O_TCPDATALEN, cblen))
4610                                 errx(EX_DATAERR, "invalid tcpdata len %s", *av);
4611                         } else
4612                             fill_cmd(cmd, O_TCPDATALEN, 0,
4613                                     strtoul(*av, NULL, 0));
4614                         av++;
4615                         break;
4616
4617                 case TOK_TCPOPTS:
4618                         NEED1("missing argument for tcpoptions");
4619                         fill_flags_cmd(cmd, O_TCPOPTS, f_tcpopts, *av);
4620                         av++;
4621                         break;
4622
4623                 case TOK_TCPSEQ:
4624                 case TOK_TCPACK:
4625                         NEED1("tcpseq/tcpack requires argument");
4626                         cmd->len = F_INSN_SIZE(ipfw_insn_u32);
4627                         cmd->opcode = (i == TOK_TCPSEQ) ? O_TCPSEQ : O_TCPACK;
4628                         cmd32->d[0] = htonl(strtoul(*av, NULL, 0));
4629                         av++;
4630                         break;
4631
4632                 case TOK_TCPWIN:
4633                         NEED1("tcpwin requires length");
4634                         if (strpbrk(*av, "-,")) {
4635                             if (!add_ports(cmd, *av, 0, O_TCPWIN, cblen))
4636                                 errx(EX_DATAERR, "invalid tcpwin len %s", *av);
4637                         } else
4638                             fill_cmd(cmd, O_TCPWIN, 0,
4639                                     strtoul(*av, NULL, 0));
4640                         av++;
4641                         break;
4642
4643                 case TOK_TCPFLAGS:
4644                         NEED1("missing argument for tcpflags");
4645                         cmd->opcode = O_TCPFLAGS;
4646                         fill_flags_cmd(cmd, O_TCPFLAGS, f_tcpflags, *av);
4647                         av++;
4648                         break;
4649
4650                 case TOK_KEEPSTATE: {
4651                         uint16_t uidx;
4652
4653                         if (open_par)
4654                                 errx(EX_USAGE, "keep-state cannot be part "
4655                                     "of an or block");
4656                         if (have_state)
4657                                 errx(EX_USAGE, "only one of keep-state "
4658                                         "and limit is allowed");
4659                         if (*av != NULL && *av[0] == ':') {
4660                                 if (state_check_name(*av + 1) != 0)
4661                                         errx(EX_DATAERR,
4662                                             "Invalid state name %s", *av);
4663                                 uidx = pack_object(tstate, *av + 1,
4664                                     IPFW_TLV_STATE_NAME);
4665                                 av++;
4666                         } else
4667                                 uidx = pack_object(tstate, default_state_name,
4668                                     IPFW_TLV_STATE_NAME);
4669                         have_state = cmd;
4670                         fill_cmd(cmd, O_KEEP_STATE, 0, uidx);
4671                         break;
4672                 }
4673
4674                 case TOK_LIMIT: {
4675                         ipfw_insn_limit *c = (ipfw_insn_limit *)cmd;
4676                         int val;
4677
4678                         if (open_par)
4679                                 errx(EX_USAGE,
4680                                     "limit cannot be part of an or block");
4681                         if (have_state)
4682                                 errx(EX_USAGE, "only one of keep-state and "
4683                                     "limit is allowed");
4684                         have_state = cmd;
4685
4686                         cmd->len = F_INSN_SIZE(ipfw_insn_limit);
4687                         CHECK_CMDLEN;
4688                         cmd->opcode = O_LIMIT;
4689                         c->limit_mask = c->conn_limit = 0;
4690
4691                         while ( av[0] != NULL ) {
4692                                 if ((val = match_token(limit_masks, *av)) <= 0)
4693                                         break;
4694                                 c->limit_mask |= val;
4695                                 av++;
4696                         }
4697
4698                         if (c->limit_mask == 0)
4699                                 errx(EX_USAGE, "limit: missing limit mask");
4700
4701                         GET_UINT_ARG(c->conn_limit, IPFW_ARG_MIN, IPFW_ARG_MAX,
4702                             TOK_LIMIT, rule_options);
4703                         av++;
4704
4705                         if (*av != NULL && *av[0] == ':') {
4706                                 if (state_check_name(*av + 1) != 0)
4707                                         errx(EX_DATAERR,
4708                                             "Invalid state name %s", *av);
4709                                 cmd->arg1 = pack_object(tstate, *av + 1,
4710                                     IPFW_TLV_STATE_NAME);
4711                                 av++;
4712                         } else
4713                                 cmd->arg1 = pack_object(tstate,
4714                                     default_state_name, IPFW_TLV_STATE_NAME);
4715                         break;
4716                 }
4717
4718                 case TOK_PROTO:
4719                         NEED1("missing protocol");
4720                         if (add_proto(cmd, *av, &proto)) {
4721                                 av++;
4722                         } else
4723                                 errx(EX_DATAERR, "invalid protocol ``%s''",
4724                                     *av);
4725                         break;
4726
4727                 case TOK_SRCIP:
4728                         NEED1("missing source IP");
4729                         if (add_srcip(cmd, *av, cblen, tstate)) {
4730                                 av++;
4731                         }
4732                         break;
4733
4734                 case TOK_DSTIP:
4735                         NEED1("missing destination IP");
4736                         if (add_dstip(cmd, *av, cblen, tstate)) {
4737                                 av++;
4738                         }
4739                         break;
4740
4741                 case TOK_SRCIP6:
4742                         NEED1("missing source IP6");
4743                         if (add_srcip6(cmd, *av, cblen, tstate)) {
4744                                 av++;
4745                         }
4746                         break;
4747
4748                 case TOK_DSTIP6:
4749                         NEED1("missing destination IP6");
4750                         if (add_dstip6(cmd, *av, cblen, tstate)) {
4751                                 av++;
4752                         }
4753                         break;
4754
4755                 case TOK_SRCPORT:
4756                         NEED1("missing source port");
4757                         if (_substrcmp(*av, "any") == 0 ||
4758                             add_ports(cmd, *av, proto, O_IP_SRCPORT, cblen)) {
4759                                 av++;
4760                         } else
4761                                 errx(EX_DATAERR, "invalid source port %s", *av);
4762                         break;
4763
4764                 case TOK_DSTPORT:
4765                         NEED1("missing destination port");
4766                         if (_substrcmp(*av, "any") == 0 ||
4767                             add_ports(cmd, *av, proto, O_IP_DSTPORT, cblen)) {
4768                                 av++;
4769                         } else
4770                                 errx(EX_DATAERR, "invalid destination port %s",
4771                                     *av);
4772                         break;
4773
4774                 case TOK_MAC:
4775                         if (add_mac(cmd, av, cblen))
4776                                 av += 2;
4777                         break;
4778
4779                 case TOK_MACTYPE:
4780                         NEED1("missing mac type");
4781                         if (!add_mactype(cmd, *av, cblen))
4782                                 errx(EX_DATAERR, "invalid mac type %s", *av);
4783                         av++;
4784                         break;
4785
4786                 case TOK_VERREVPATH:
4787                         fill_cmd(cmd, O_VERREVPATH, 0, 0);
4788                         break;
4789
4790                 case TOK_VERSRCREACH:
4791                         fill_cmd(cmd, O_VERSRCREACH, 0, 0);
4792                         break;
4793
4794                 case TOK_ANTISPOOF:
4795                         fill_cmd(cmd, O_ANTISPOOF, 0, 0);
4796                         break;
4797
4798                 case TOK_IPSEC:
4799                         fill_cmd(cmd, O_IPSEC, 0, 0);
4800                         break;
4801
4802                 case TOK_IPV6:
4803                         fill_cmd(cmd, O_IP6, 0, 0);
4804                         break;
4805
4806                 case TOK_IPV4:
4807                         fill_cmd(cmd, O_IP4, 0, 0);
4808                         break;
4809
4810                 case TOK_EXT6HDR:
4811                         fill_ext6hdr( cmd, *av );
4812                         av++;
4813                         break;
4814
4815                 case TOK_FLOWID:
4816                         if (proto != IPPROTO_IPV6 )
4817                                 errx( EX_USAGE, "flow-id filter is active "
4818                                     "only for ipv6 protocol\n");
4819                         fill_flow6( (ipfw_insn_u32 *) cmd, *av, cblen);
4820                         av++;
4821                         break;
4822
4823                 case TOK_COMMENT:
4824                         fill_comment(cmd, av, cblen);
4825                         av[0]=NULL;
4826                         break;
4827
4828                 case TOK_TAGGED:
4829                         if (av[0] && strpbrk(*av, "-,")) {
4830                                 if (!add_ports(cmd, *av, 0, O_TAGGED, cblen))
4831                                         errx(EX_DATAERR, "tagged: invalid tag"
4832                                             " list: %s", *av);
4833                         }
4834                         else {
4835                                 uint16_t tag;
4836
4837                                 GET_UINT_ARG(tag, IPFW_ARG_MIN, IPFW_ARG_MAX,
4838                                     TOK_TAGGED, rule_options);
4839                                 fill_cmd(cmd, O_TAGGED, 0, tag);
4840                         }
4841                         av++;
4842                         break;
4843
4844                 case TOK_FIB:
4845                         NEED1("fib requires fib number");
4846                         fill_cmd(cmd, O_FIB, 0, strtoul(*av, NULL, 0));
4847                         av++;
4848                         break;
4849                 case TOK_SOCKARG:
4850                         fill_cmd(cmd, O_SOCKARG, 0, 0);
4851                         break;
4852
4853                 case TOK_LOOKUP: {
4854                         ipfw_insn_u32 *c = (ipfw_insn_u32 *)cmd;
4855                         int j;
4856
4857                         if (!av[0] || !av[1])
4858                                 errx(EX_USAGE, "format: lookup argument tablenum");
4859                         cmd->opcode = O_IP_DST_LOOKUP;
4860                         cmd->len |= F_INSN_SIZE(ipfw_insn) + 2;
4861                         i = match_token(rule_options, *av);
4862                         for (j = 0; lookup_key[j] >= 0 ; j++) {
4863                                 if (i == lookup_key[j])
4864                                         break;
4865                         }
4866                         if (lookup_key[j] <= 0)
4867                                 errx(EX_USAGE, "format: cannot lookup on %s", *av);
4868                         __PAST_END(c->d, 1) = j; // i converted to option
4869                         av++;
4870
4871                         if ((j = pack_table(tstate, *av)) == 0)
4872                                 errx(EX_DATAERR, "Invalid table name: %s", *av);
4873
4874                         cmd->arg1 = j;
4875                         av++;
4876                     }
4877                         break;
4878                 case TOK_FLOW:
4879                         NEED1("missing table name");
4880                         if (strncmp(*av, "table(", 6) != 0)
4881                                 errx(EX_DATAERR,
4882                                     "enclose table name into \"table()\"");
4883                         fill_table(cmd, *av, O_IP_FLOW_LOOKUP, tstate);
4884                         av++;
4885                         break;
4886
4887                 default:
4888                         errx(EX_USAGE, "unrecognised option [%d] %s\n", i, s);
4889                 }
4890                 if (F_LEN(cmd) > 0) {   /* prepare to advance */
4891                         prev = cmd;
4892                         cmd = next_cmd(cmd, &cblen);
4893                 }
4894         }
4895
4896 done:
4897         /*
4898          * Now copy stuff into the rule.
4899          * If we have a keep-state option, the first instruction
4900          * must be a PROBE_STATE (which is generated here).
4901          * If we have a LOG option, it was stored as the first command,
4902          * and now must be moved to the top of the action part.
4903          */
4904         dst = (ipfw_insn *)rule->cmd;
4905
4906         /*
4907          * First thing to write into the command stream is the match probability.
4908          */
4909         if (match_prob != 1) { /* 1 means always match */
4910                 dst->opcode = O_PROB;
4911                 dst->len = 2;
4912                 *((int32_t *)(dst+1)) = (int32_t)(match_prob * 0x7fffffff);
4913                 dst += dst->len;
4914         }
4915
4916         /*
4917          * generate O_PROBE_STATE if necessary
4918          */
4919         if (have_state && have_state->opcode != O_CHECK_STATE) {
4920                 fill_cmd(dst, O_PROBE_STATE, 0, have_state->arg1);
4921                 dst = next_cmd(dst, &rblen);
4922         }
4923
4924         /* copy all commands but O_LOG, O_KEEP_STATE, O_LIMIT, O_ALTQ, O_TAG */
4925         for (src = (ipfw_insn *)cmdbuf; src != cmd; src += i) {
4926                 i = F_LEN(src);
4927                 CHECK_RBUFLEN(i);
4928
4929                 switch (src->opcode) {
4930                 case O_LOG:
4931                 case O_KEEP_STATE:
4932                 case O_LIMIT:
4933                 case O_ALTQ:
4934                 case O_TAG:
4935                         break;
4936                 default:
4937                         bcopy(src, dst, i * sizeof(uint32_t));
4938                         dst += i;
4939                 }
4940         }
4941
4942         /*
4943          * put back the have_state command as last opcode
4944          */
4945         if (have_state && have_state->opcode != O_CHECK_STATE) {
4946                 i = F_LEN(have_state);
4947                 CHECK_RBUFLEN(i);
4948                 bcopy(have_state, dst, i * sizeof(uint32_t));
4949                 dst += i;
4950         }
4951         /*
4952          * start action section
4953          */
4954         rule->act_ofs = dst - rule->cmd;
4955
4956         /* put back O_LOG, O_ALTQ, O_TAG if necessary */
4957         if (have_log) {
4958                 i = F_LEN(have_log);
4959                 CHECK_RBUFLEN(i);
4960                 bcopy(have_log, dst, i * sizeof(uint32_t));
4961                 dst += i;
4962         }
4963         if (have_altq) {
4964                 i = F_LEN(have_altq);
4965                 CHECK_RBUFLEN(i);
4966                 bcopy(have_altq, dst, i * sizeof(uint32_t));
4967                 dst += i;
4968         }
4969         if (have_tag) {
4970                 i = F_LEN(have_tag);
4971                 CHECK_RBUFLEN(i);
4972                 bcopy(have_tag, dst, i * sizeof(uint32_t));
4973                 dst += i;
4974         }
4975
4976         /*
4977          * copy all other actions
4978          */
4979         for (src = (ipfw_insn *)actbuf; src != action; src += i) {
4980                 i = F_LEN(src);
4981                 CHECK_RBUFLEN(i);
4982                 bcopy(src, dst, i * sizeof(uint32_t));
4983                 dst += i;
4984         }
4985
4986         rule->cmd_len = (uint32_t *)dst - (uint32_t *)(rule->cmd);
4987         *rbufsize = (char *)dst - (char *)rule;
4988 }
4989
4990 static int
4991 compare_ntlv(const void *_a, const void *_b)
4992 {
4993         ipfw_obj_ntlv *a, *b;
4994
4995         a = (ipfw_obj_ntlv *)_a;
4996         b = (ipfw_obj_ntlv *)_b;
4997
4998         if (a->set < b->set)
4999                 return (-1);
5000         else if (a->set > b->set)
5001                 return (1);
5002
5003         if (a->idx < b->idx)
5004                 return (-1);
5005         else if (a->idx > b->idx)
5006                 return (1);
5007
5008         if (a->head.type < b->head.type)
5009                 return (-1);
5010         else if (a->head.type > b->head.type)
5011                 return (1);
5012
5013         return (0);
5014 }
5015
5016 /*
5017  * Provide kernel with sorted list of referenced objects
5018  */
5019 static void
5020 object_sort_ctlv(ipfw_obj_ctlv *ctlv)
5021 {
5022
5023         qsort(ctlv + 1, ctlv->count, ctlv->objsize, compare_ntlv);
5024 }
5025
5026 struct object_kt {
5027         uint16_t        uidx;
5028         uint16_t        type;
5029 };
5030 static int
5031 compare_object_kntlv(const void *k, const void *v)
5032 {
5033         ipfw_obj_ntlv *ntlv;
5034         struct object_kt key;
5035
5036         key = *((struct object_kt *)k);
5037         ntlv = (ipfw_obj_ntlv *)v;
5038
5039         if (key.uidx < ntlv->idx)
5040                 return (-1);
5041         else if (key.uidx > ntlv->idx)
5042                 return (1);
5043
5044         if (key.type < ntlv->head.type)
5045                 return (-1);
5046         else if (key.type > ntlv->head.type)
5047                 return (1);
5048
5049         return (0);
5050 }
5051
5052 /*
5053  * Finds object name in @ctlv by @idx and @type.
5054  * Uses the following facts:
5055  * 1) All TLVs are the same size
5056  * 2) Kernel implementation provides already sorted list.
5057  *
5058  * Returns table name or NULL.
5059  */
5060 static char *
5061 object_search_ctlv(ipfw_obj_ctlv *ctlv, uint16_t idx, uint16_t type)
5062 {
5063         ipfw_obj_ntlv *ntlv;
5064         struct object_kt key;
5065
5066         key.uidx = idx;
5067         key.type = type;
5068
5069         ntlv = bsearch(&key, (ctlv + 1), ctlv->count, ctlv->objsize,
5070             compare_object_kntlv);
5071
5072         if (ntlv != NULL)
5073                 return (ntlv->name);
5074
5075         return (NULL);
5076 }
5077
5078 static char *
5079 table_search_ctlv(ipfw_obj_ctlv *ctlv, uint16_t idx)
5080 {
5081
5082         return (object_search_ctlv(ctlv, idx, IPFW_TLV_TBL_NAME));
5083 }
5084
5085 /*
5086  * Adds one or more rules to ipfw chain.
5087  * Data layout:
5088  * Request:
5089  * [
5090  *   ip_fw3_opheader
5091  *   [ ipfw_obj_ctlv(IPFW_TLV_TBL_LIST) ipfw_obj_ntlv x N ] (optional *1)
5092  *   [ ipfw_obj_ctlv(IPFW_TLV_RULE_LIST) [ ip_fw_rule ip_fw_insn ] x N ] (*2) (*3)
5093  * ]
5094  * Reply:
5095  * [
5096  *   ip_fw3_opheader
5097  *   [ ipfw_obj_ctlv(IPFW_TLV_TBL_LIST) ipfw_obj_ntlv x N ] (optional)
5098  *   [ ipfw_obj_ctlv(IPFW_TLV_RULE_LIST) [ ip_fw_rule ip_fw_insn ] x N ]
5099  * ]
5100  *
5101  * Rules in reply are modified to store their actual ruleset number.
5102  *
5103  * (*1) TLVs inside IPFW_TLV_TBL_LIST needs to be sorted ascending
5104  * according to their idx field and there has to be no duplicates.
5105  * (*2) Numbered rules inside IPFW_TLV_RULE_LIST needs to be sorted ascending.
5106  * (*3) Each ip_fw structure needs to be aligned to u64 boundary.
5107  */
5108 void
5109 ipfw_add(char *av[])
5110 {
5111         uint32_t rulebuf[1024];
5112         int rbufsize, default_off, tlen, rlen;
5113         size_t sz;
5114         struct tidx ts;
5115         struct ip_fw_rule *rule;
5116         caddr_t tbuf;
5117         ip_fw3_opheader *op3;
5118         ipfw_obj_ctlv *ctlv, *tstate;
5119
5120         rbufsize = sizeof(rulebuf);
5121         memset(rulebuf, 0, rbufsize);
5122         memset(&ts, 0, sizeof(ts));
5123
5124         /* Optimize case with no tables */
5125         default_off = sizeof(ipfw_obj_ctlv) + sizeof(ip_fw3_opheader);
5126         op3 = (ip_fw3_opheader *)rulebuf;
5127         ctlv = (ipfw_obj_ctlv *)(op3 + 1);
5128         rule = (struct ip_fw_rule *)(ctlv + 1);
5129         rbufsize -= default_off;
5130
5131         compile_rule(av, (uint32_t *)rule, &rbufsize, &ts);
5132         /* Align rule size to u64 boundary */
5133         rlen = roundup2(rbufsize, sizeof(uint64_t));
5134
5135         tbuf = NULL;
5136         sz = 0;
5137         tstate = NULL;
5138         if (ts.count != 0) {
5139                 /* Some tables. We have to alloc more data */
5140                 tlen = ts.count * sizeof(ipfw_obj_ntlv);
5141                 sz = default_off + sizeof(ipfw_obj_ctlv) + tlen + rlen;
5142
5143                 if ((tbuf = calloc(1, sz)) == NULL)
5144                         err(EX_UNAVAILABLE, "malloc() failed for IP_FW_ADD");
5145                 op3 = (ip_fw3_opheader *)tbuf;
5146                 /* Tables first */
5147                 ctlv = (ipfw_obj_ctlv *)(op3 + 1);
5148                 ctlv->head.type = IPFW_TLV_TBLNAME_LIST;
5149                 ctlv->head.length = sizeof(ipfw_obj_ctlv) + tlen;
5150                 ctlv->count = ts.count;
5151                 ctlv->objsize = sizeof(ipfw_obj_ntlv);
5152                 memcpy(ctlv + 1, ts.idx, tlen);
5153                 object_sort_ctlv(ctlv);
5154                 tstate = ctlv;
5155                 /* Rule next */
5156                 ctlv = (ipfw_obj_ctlv *)((caddr_t)ctlv + ctlv->head.length);
5157                 ctlv->head.type = IPFW_TLV_RULE_LIST;
5158                 ctlv->head.length = sizeof(ipfw_obj_ctlv) + rlen;
5159                 ctlv->count = 1;
5160                 memcpy(ctlv + 1, rule, rbufsize);
5161         } else {
5162                 /* Simply add header */
5163                 sz = rlen + default_off;
5164                 memset(ctlv, 0, sizeof(*ctlv));
5165                 ctlv->head.type = IPFW_TLV_RULE_LIST;
5166                 ctlv->head.length = sizeof(ipfw_obj_ctlv) + rlen;
5167                 ctlv->count = 1;
5168         }
5169
5170         if (do_get3(IP_FW_XADD, op3, &sz) != 0)
5171                 err(EX_UNAVAILABLE, "getsockopt(%s)", "IP_FW_XADD");
5172
5173         if (!co.do_quiet) {
5174                 struct format_opts sfo;
5175                 struct buf_pr bp;
5176                 memset(&sfo, 0, sizeof(sfo));
5177                 sfo.tstate = tstate;
5178                 sfo.set_mask = (uint32_t)(-1);
5179                 bp_alloc(&bp, 4096);
5180                 show_static_rule(&co, &sfo, &bp, rule, NULL);
5181                 printf("%s", bp.buf);
5182                 bp_free(&bp);
5183         }
5184
5185         if (tbuf != NULL)
5186                 free(tbuf);
5187
5188         if (ts.idx != NULL)
5189                 free(ts.idx);
5190 }
5191
5192 /*
5193  * clear the counters or the log counters.
5194  * optname has the following values:
5195  *  0 (zero both counters and logging)
5196  *  1 (zero logging only)
5197  */
5198 void
5199 ipfw_zero(int ac, char *av[], int optname)
5200 {
5201         ipfw_range_tlv rt;
5202         char const *errstr;
5203         char const *name = optname ? "RESETLOG" : "ZERO";
5204         uint32_t arg;
5205         int failed = EX_OK;
5206
5207         optname = optname ? IP_FW_XRESETLOG : IP_FW_XZERO;
5208         av++; ac--;
5209
5210         if (ac == 0) {
5211                 /* clear all entries */
5212                 memset(&rt, 0, sizeof(rt));
5213                 rt.flags = IPFW_RCFLAG_ALL;
5214                 if (do_range_cmd(optname, &rt) < 0)
5215                         err(EX_UNAVAILABLE, "setsockopt(IP_FW_X%s)", name);
5216                 if (!co.do_quiet)
5217                         printf("%s.\n", optname == IP_FW_XZERO ?
5218                             "Accounting cleared":"Logging counts reset");
5219
5220                 return;
5221         }
5222
5223         while (ac) {
5224                 /* Rule number */
5225                 if (isdigit(**av)) {
5226                         arg = strtonum(*av, 0, 0xffff, &errstr);
5227                         if (errstr)
5228                                 errx(EX_DATAERR,
5229                                     "invalid rule number %s\n", *av);
5230                         memset(&rt, 0, sizeof(rt));
5231                         rt.start_rule = arg;
5232                         rt.end_rule = arg;
5233                         rt.flags |= IPFW_RCFLAG_RANGE;
5234                         if (co.use_set != 0) {
5235                                 rt.set = co.use_set - 1;
5236                                 rt.flags |= IPFW_RCFLAG_SET;
5237                         }
5238                         if (do_range_cmd(optname, &rt) != 0) {
5239                                 warn("rule %u: setsockopt(IP_FW_X%s)",
5240                                     arg, name);
5241                                 failed = EX_UNAVAILABLE;
5242                         } else if (rt.new_set == 0) {
5243                                 printf("Entry %d not found\n", arg);
5244                                 failed = EX_UNAVAILABLE;
5245                         } else if (!co.do_quiet)
5246                                 printf("Entry %d %s.\n", arg,
5247                                     optname == IP_FW_XZERO ?
5248                                         "cleared" : "logging count reset");
5249                 } else {
5250                         errx(EX_USAGE, "invalid rule number ``%s''", *av);
5251                 }
5252                 av++; ac--;
5253         }
5254         if (failed != EX_OK)
5255                 exit(failed);
5256 }
5257
5258 void
5259 ipfw_flush(int force)
5260 {
5261         ipfw_range_tlv rt;
5262
5263         if (!force && !co.do_quiet) { /* need to ask user */
5264                 int c;
5265
5266                 printf("Are you sure? [yn] ");
5267                 fflush(stdout);
5268                 do {
5269                         c = toupper(getc(stdin));
5270                         while (c != '\n' && getc(stdin) != '\n')
5271                                 if (feof(stdin))
5272                                         return; /* and do not flush */
5273                 } while (c != 'Y' && c != 'N');
5274                 printf("\n");
5275                 if (c == 'N')   /* user said no */
5276                         return;
5277         }
5278         if (co.do_pipe) {
5279                 dummynet_flush();
5280                 return;
5281         }
5282         /* `ipfw set N flush` - is the same that `ipfw delete set N` */
5283         memset(&rt, 0, sizeof(rt));
5284         if (co.use_set != 0) {
5285                 rt.set = co.use_set - 1;
5286                 rt.flags = IPFW_RCFLAG_SET;
5287         } else
5288                 rt.flags = IPFW_RCFLAG_ALL;
5289         if (do_range_cmd(IP_FW_XDEL, &rt) != 0)
5290                         err(EX_UNAVAILABLE, "setsockopt(IP_FW_XDEL)");
5291         if (!co.do_quiet)
5292                 printf("Flushed all %s.\n", co.do_pipe ? "pipes" : "rules");
5293 }
5294
5295 static struct _s_x intcmds[] = {
5296       { "talist",       TOK_TALIST },
5297       { "iflist",       TOK_IFLIST },
5298       { "olist",        TOK_OLIST },
5299       { "vlist",        TOK_VLIST },
5300       { NULL, 0 }
5301 };
5302
5303 static struct _s_x otypes[] = {
5304         { "EACTION",    IPFW_TLV_EACTION },
5305         { "DYNSTATE",   IPFW_TLV_STATE_NAME },
5306         { NULL, 0 }
5307 };
5308
5309 static const char*
5310 lookup_eaction_name(ipfw_obj_ntlv *ntlv, int cnt, uint16_t type)
5311 {
5312         const char *name;
5313         int i;
5314
5315         name = NULL;
5316         for (i = 0; i < cnt; i++) {
5317                 if (ntlv[i].head.type != IPFW_TLV_EACTION)
5318                         continue;
5319                 if (IPFW_TLV_EACTION_NAME(ntlv[i].idx) != type)
5320                         continue;
5321                 name = ntlv[i].name;
5322                 break;
5323         }
5324         return (name);
5325 }
5326
5327 static void
5328 ipfw_list_objects(int ac, char *av[])
5329 {
5330         ipfw_obj_lheader req, *olh;
5331         ipfw_obj_ntlv *ntlv;
5332         const char *name;
5333         size_t sz;
5334         int i;
5335
5336         memset(&req, 0, sizeof(req));
5337         sz = sizeof(req);
5338         if (do_get3(IP_FW_DUMP_SRVOBJECTS, &req.opheader, &sz) != 0)
5339                 if (errno != ENOMEM)
5340                         return;
5341
5342         sz = req.size;
5343         if ((olh = calloc(1, sz)) == NULL)
5344                 return;
5345
5346         olh->size = sz;
5347         if (do_get3(IP_FW_DUMP_SRVOBJECTS, &olh->opheader, &sz) != 0) {
5348                 free(olh);
5349                 return;
5350         }
5351
5352         if (olh->count > 0)
5353                 printf("Objects list:\n");
5354         else
5355                 printf("There are no objects\n");
5356         ntlv = (ipfw_obj_ntlv *)(olh + 1);
5357         for (i = 0; i < olh->count; i++) {
5358                 name = match_value(otypes, ntlv->head.type);
5359                 if (name == NULL)
5360                         name = lookup_eaction_name(
5361                             (ipfw_obj_ntlv *)(olh + 1), olh->count,
5362                             ntlv->head.type);
5363                 if (name == NULL)
5364                         printf(" kidx: %4d\ttype: %10d\tname: %s\n",
5365                             ntlv->idx, ntlv->head.type, ntlv->name);
5366                 else
5367                         printf(" kidx: %4d\ttype: %10s\tname: %s\n",
5368                             ntlv->idx, name, ntlv->name);
5369                 ntlv++;
5370         }
5371         free(olh);
5372 }
5373
5374 void
5375 ipfw_internal_handler(int ac, char *av[])
5376 {
5377         int tcmd;
5378
5379         ac--; av++;
5380         NEED1("internal cmd required");
5381
5382         if ((tcmd = match_token(intcmds, *av)) == -1)
5383                 errx(EX_USAGE, "invalid internal sub-cmd: %s", *av);
5384
5385         switch (tcmd) {
5386         case TOK_IFLIST:
5387                 ipfw_list_tifaces();
5388                 break;
5389         case TOK_TALIST:
5390                 ipfw_list_ta(ac, av);
5391                 break;
5392         case TOK_OLIST:
5393                 ipfw_list_objects(ac, av);
5394                 break;
5395         case TOK_VLIST:
5396                 ipfw_list_values(ac, av);
5397                 break;
5398         }
5399 }
5400
5401 static int
5402 ipfw_get_tracked_ifaces(ipfw_obj_lheader **polh)
5403 {
5404         ipfw_obj_lheader req, *olh;
5405         size_t sz;
5406
5407         memset(&req, 0, sizeof(req));
5408         sz = sizeof(req);
5409
5410         if (do_get3(IP_FW_XIFLIST, &req.opheader, &sz) != 0) {
5411                 if (errno != ENOMEM)
5412                         return (errno);
5413         }
5414
5415         sz = req.size;
5416         if ((olh = calloc(1, sz)) == NULL)
5417                 return (ENOMEM);
5418
5419         olh->size = sz;
5420         if (do_get3(IP_FW_XIFLIST, &olh->opheader, &sz) != 0) {
5421                 free(olh);
5422                 return (errno);
5423         }
5424
5425         *polh = olh;
5426         return (0);
5427 }
5428
5429 static int
5430 ifinfo_cmp(const void *a, const void *b)
5431 {
5432         ipfw_iface_info *ia, *ib;
5433
5434         ia = (ipfw_iface_info *)a;
5435         ib = (ipfw_iface_info *)b;
5436
5437         return (stringnum_cmp(ia->ifname, ib->ifname));
5438 }
5439
5440 /*
5441  * Retrieves table list from kernel,
5442  * optionally sorts it and calls requested function for each table.
5443  * Returns 0 on success.
5444  */
5445 static void
5446 ipfw_list_tifaces()
5447 {
5448         ipfw_obj_lheader *olh;
5449         ipfw_iface_info *info;
5450         int i, error;
5451
5452         if ((error = ipfw_get_tracked_ifaces(&olh)) != 0)
5453                 err(EX_OSERR, "Unable to request ipfw tracked interface list");
5454
5455
5456         qsort(olh + 1, olh->count, olh->objsize, ifinfo_cmp);
5457
5458         info = (ipfw_iface_info *)(olh + 1);
5459         for (i = 0; i < olh->count; i++) {
5460                 if (info->flags & IPFW_IFFLAG_RESOLVED)
5461                         printf("%s ifindex: %d refcount: %u changes: %u\n",
5462                             info->ifname, info->ifindex, info->refcnt,
5463                             info->gencnt);
5464                 else
5465                         printf("%s ifindex: unresolved refcount: %u changes: %u\n",
5466                             info->ifname, info->refcnt, info->gencnt);
5467                 info = (ipfw_iface_info *)((caddr_t)info + olh->objsize);
5468         }
5469
5470         free(olh);
5471 }
5472
5473
5474
5475