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 <jail.h>
  36 #include <netdb.h>
  37 #include <pwd.h>
  38 #include <stdio.h>
  39 #include <stdarg.h>
  40 #include <stdint.h>
  41 #include <stdlib.h>
  42 #include <string.h>
  43 #include <sysexits.h>
  44 #include <time.h>       /* ctime */
  45 #include <timeconv.h>   /* _long_to_time */
  46 #include <unistd.h>
  47 #include <fcntl.h>
  48 #include <stddef.h>     /* offsetof */
  49
  50 #include <net/ethernet.h>
  51 #include <net/if.h>             /* only IFNAMSIZ */
  52 #include <netinet/in.h>
  53 #include <netinet/in_systm.h>   /* only n_short, n_long */
  54 #include <netinet/ip.h>
  55 #include <netinet/ip_icmp.h>
  56 #include <netinet/ip_fw.h>
  57 #include <netinet/tcp.h>
  58 #include <arpa/inet.h>
  59
  60 struct cmdline_opts co; /* global options */
  61
  62 struct format_opts {
  63         int bcwidth;
  64         int pcwidth;
  65         int show_counters;
  66         int show_time;          /* show timestamp */
  67         uint32_t set_mask;      /* enabled sets mask */
  68         uint32_t flags;         /* request flags */
  69         uint32_t first;         /* first rule to request */
  70         uint32_t last;          /* last rule to request */
  71         uint32_t dcnt;          /* number of dynamic states */
  72         ipfw_obj_ctlv *tstate;  /* table state data */
  73 };
  74
  75 int resvd_set_number = RESVD_SET;
  76
  77 int ipfw_socket = -1;
  78
  79 #define CHECK_LENGTH(v, len) do {                               \
  80         if ((v) < (len))                                        \
  81                 errx(EX_DATAERR, "Rule too long");              \
  82         } while (0)
  83 /*
  84  * Check if we have enough space in cmd buffer. Note that since
  85  * first 8? u32 words are reserved by reserved header, full cmd
  86  * buffer can't be used, so we need to protect from buffer overrun
  87  * only. At the beginning, cblen is less than actual buffer size by
  88  * size of ipfw_insn_u32 instruction + 1 u32 work. This eliminates need
  89  * for checking small instructions fitting in given range.
  90  * We also (ab)use the fact that ipfw_insn is always the first field
  91  * for any custom instruction.
  92  */
  93 #define CHECK_CMDLEN    CHECK_LENGTH(cblen, F_LEN((ipfw_insn *)cmd))
  94
  95 #define GET_UINT_ARG(arg, min, max, tok, s_x) do {                      \
  96         if (!av[0])                                                     \
  97                 errx(EX_USAGE, "%s: missing argument", match_value(s_x, tok)); \
  98         if (_substrcmp(*av, "tablearg") == 0) {                         \
  99                 arg = IP_FW_TARG;                                       \
 100                 break;                                                  \
 101         }                                                               \
 102                                                                         \
 103         {                                                               \
 104         long _xval;                                                     \
 105         char *end;                                                      \
 106                                                                         \
 107         _xval = strtol(*av, &end, 10);                                  \
 108                                                                         \
 109         if (!isdigit(**av) || *end != '\0' || (_xval == 0 && errno == EINVAL)) \
 110                 errx(EX_DATAERR, "%s: invalid argument: %s",            \
 111                     match_value(s_x, tok), *av);                        \
 112                                                                         \
 113         if (errno == ERANGE || _xval < min || _xval > max)              \
 114                 errx(EX_DATAERR, "%s: argument is out of range (%u..%u): %s", \
 115                     match_value(s_x, tok), min, max, *av);              \
 116                                                                         \
 117         if (_xval == IP_FW_TARG)                                        \
 118                 errx(EX_DATAERR, "%s: illegal argument value: %s",      \
 119                     match_value(s_x, tok), *av);                        \
 120         arg = _xval;                                                    \
 121         }                                                               \
 122 } while (0)
 123
 124 static struct _s_x f_tcpflags[] = {
 125         { "syn", TH_SYN },
 126         { "fin", TH_FIN },
 127         { "ack", TH_ACK },
 128         { "psh", TH_PUSH },
 129         { "rst", TH_RST },
 130         { "urg", TH_URG },
 131         { "tcp flag", 0 },
 132         { NULL, 0 }
 133 };
 134
 135 static struct _s_x f_tcpopts[] = {
 136         { "mss",        IP_FW_TCPOPT_MSS },
 137         { "maxseg",     IP_FW_TCPOPT_MSS },
 138         { "window",     IP_FW_TCPOPT_WINDOW },
 139         { "sack",       IP_FW_TCPOPT_SACK },
 140         { "ts",         IP_FW_TCPOPT_TS },
 141         { "timestamp",  IP_FW_TCPOPT_TS },
 142         { "cc",         IP_FW_TCPOPT_CC },
 143         { "tcp option", 0 },
 144         { NULL, 0 }
 145 };
 146
 147 /*
 148  * IP options span the range 0 to 255 so we need to remap them
 149  * (though in fact only the low 5 bits are significant).
 150  */
 151 static struct _s_x f_ipopts[] = {
 152         { "ssrr",       IP_FW_IPOPT_SSRR},
 153         { "lsrr",       IP_FW_IPOPT_LSRR},
 154         { "rr",         IP_FW_IPOPT_RR},
 155         { "ts",         IP_FW_IPOPT_TS},
 156         { "ip option",  0 },
 157         { NULL, 0 }
 158 };
 159
 160 static struct _s_x f_iptos[] = {
 161         { "lowdelay",   IPTOS_LOWDELAY},
 162         { "throughput", IPTOS_THROUGHPUT},
 163         { "reliability", IPTOS_RELIABILITY},
 164         { "mincost",    IPTOS_MINCOST},
 165         { "congestion", IPTOS_ECN_CE},
 166         { "ecntransport", IPTOS_ECN_ECT0},
 167         { "ip tos option", 0},
 168         { NULL, 0 }
 169 };
 170
 171 struct _s_x f_ipdscp[] = {
 172         { "af11", IPTOS_DSCP_AF11 >> 2 },       /* 001010 */
 173         { "af12", IPTOS_DSCP_AF12 >> 2 },       /* 001100 */
 174         { "af13", IPTOS_DSCP_AF13 >> 2 },       /* 001110 */
 175         { "af21", IPTOS_DSCP_AF21 >> 2 },       /* 010010 */
 176         { "af22", IPTOS_DSCP_AF22 >> 2 },       /* 010100 */
 177         { "af23", IPTOS_DSCP_AF23 >> 2 },       /* 010110 */
 178         { "af31", IPTOS_DSCP_AF31 >> 2 },       /* 011010 */
 179         { "af32", IPTOS_DSCP_AF32 >> 2 },       /* 011100 */
 180         { "af33", IPTOS_DSCP_AF33 >> 2 },       /* 011110 */
 181         { "af41", IPTOS_DSCP_AF41 >> 2 },       /* 100010 */
 182         { "af42", IPTOS_DSCP_AF42 >> 2 },       /* 100100 */
 183         { "af43", IPTOS_DSCP_AF43 >> 2 },       /* 100110 */
 184         { "be", IPTOS_DSCP_CS0 >> 2 },  /* 000000 */
 185         { "ef", IPTOS_DSCP_EF >> 2 },   /* 101110 */
 186         { "cs0", IPTOS_DSCP_CS0 >> 2 }, /* 000000 */
 187         { "cs1", IPTOS_DSCP_CS1 >> 2 }, /* 001000 */
 188         { "cs2", IPTOS_DSCP_CS2 >> 2 }, /* 010000 */
 189         { "cs3", IPTOS_DSCP_CS3 >> 2 }, /* 011000 */
 190         { "cs4", IPTOS_DSCP_CS4 >> 2 }, /* 100000 */
 191         { "cs5", IPTOS_DSCP_CS5 >> 2 }, /* 101000 */
 192         { "cs6", IPTOS_DSCP_CS6 >> 2 }, /* 110000 */
 193         { "cs7", IPTOS_DSCP_CS7 >> 2 }, /* 100000 */
 194         { NULL, 0 }
 195 };
 196
 197 static struct _s_x limit_masks[] = {
 198         {"all",         DYN_SRC_ADDR|DYN_SRC_PORT|DYN_DST_ADDR|DYN_DST_PORT},
 199         {"src-addr",    DYN_SRC_ADDR},
 200         {"src-port",    DYN_SRC_PORT},
 201         {"dst-addr",    DYN_DST_ADDR},
 202         {"dst-port",    DYN_DST_PORT},
 203         {NULL,          0}
 204 };
 205
 206 /*
 207  * we use IPPROTO_ETHERTYPE as a fake protocol id to call the print routines
 208  * This is only used in this code.
 209  */
 210 #define IPPROTO_ETHERTYPE       0x1000
 211 static struct _s_x ether_types[] = {
 212     /*
 213      * Note, we cannot use "-:&/" in the names because they are field
 214      * separators in the type specifications. Also, we use s = NULL as
 215      * end-delimiter, because a type of 0 can be legal.
 216      */
 217         { "ip",         0x0800 },
 218         { "ipv4",       0x0800 },
 219         { "ipv6",       0x86dd },
 220         { "arp",        0x0806 },
 221         { "rarp",       0x8035 },
 222         { "vlan",       0x8100 },
 223         { "loop",       0x9000 },
 224         { "trail",      0x1000 },
 225         { "at",         0x809b },
 226         { "atalk",      0x809b },
 227         { "aarp",       0x80f3 },
 228         { "pppoe_disc", 0x8863 },
 229         { "pppoe_sess", 0x8864 },
 230         { "ipx_8022",   0x00E0 },
 231         { "ipx_8023",   0x0000 },
 232         { "ipx_ii",     0x8137 },
 233         { "ipx_snap",   0x8137 },
 234         { "ipx",        0x8137 },
 235         { "ns",         0x0600 },
 236         { NULL,         0 }
 237 };
 238
 239 static struct _s_x rule_eactions[] = {
 240         { "nat64lsn",           TOK_NAT64LSN },
 241         { "nat64stl",           TOK_NAT64STL },
 242         { "nptv6",              TOK_NPTV6 },
 243         { "tcp-setmss",         TOK_TCPSETMSS },
 244         { NULL, 0 }     /* terminator */
 245 };
 246
 247 static struct _s_x rule_actions[] = {
 248         { "abort6",             TOK_ABORT6 },
 249         { "abort",              TOK_ABORT },
 250         { "accept",             TOK_ACCEPT },
 251         { "pass",               TOK_ACCEPT },
 252         { "allow",              TOK_ACCEPT },
 253         { "permit",             TOK_ACCEPT },
 254         { "count",              TOK_COUNT },
 255         { "pipe",               TOK_PIPE },
 256         { "queue",              TOK_QUEUE },
 257         { "divert",             TOK_DIVERT },
 258         { "tee",                TOK_TEE },
 259         { "netgraph",           TOK_NETGRAPH },
 260         { "ngtee",              TOK_NGTEE },
 261         { "fwd",                TOK_FORWARD },
 262         { "forward",            TOK_FORWARD },
 263         { "skipto",             TOK_SKIPTO },
 264         { "deny",               TOK_DENY },
 265         { "drop",               TOK_DENY },
 266         { "reject",             TOK_REJECT },
 267         { "reset6",             TOK_RESET6 },
 268         { "reset",              TOK_RESET },
 269         { "unreach6",           TOK_UNREACH6 },
 270         { "unreach",            TOK_UNREACH },
 271         { "check-state",        TOK_CHECKSTATE },
 272         { "//",                 TOK_COMMENT },
 273         { "nat",                TOK_NAT },
 274         { "reass",              TOK_REASS },
 275         { "setfib",             TOK_SETFIB },
 276         { "setdscp",            TOK_SETDSCP },
 277         { "call",               TOK_CALL },
 278         { "return",             TOK_RETURN },
 279         { "eaction",            TOK_EACTION },
 280         { "tcp-setmss",         TOK_TCPSETMSS },
 281         { NULL, 0 }     /* terminator */
 282 };
 283
 284 static struct _s_x rule_action_params[] = {
 285         { "altq",               TOK_ALTQ },
 286         { "log",                TOK_LOG },
 287         { "tag",                TOK_TAG },
 288         { "untag",              TOK_UNTAG },
 289         { NULL, 0 }     /* terminator */
 290 };
 291
 292 /*
 293  * The 'lookup' instruction accepts one of the following arguments.
 294  * -1 is a terminator for the list.
 295  * Arguments are passed as v[1] in O_DST_LOOKUP options.
 296  */
 297 static int lookup_key[] = {
 298         TOK_DSTIP, TOK_SRCIP, TOK_DSTPORT, TOK_SRCPORT,
 299         TOK_UID, TOK_JAIL, TOK_DSCP, -1 };
 300
 301 static struct _s_x rule_options[] = {
 302         { "tagged",             TOK_TAGGED },
 303         { "uid",                TOK_UID },
 304         { "gid",                TOK_GID },
 305         { "jail",               TOK_JAIL },
 306         { "in",                 TOK_IN },
 307         { "limit",              TOK_LIMIT },
 308         { "set-limit",          TOK_SETLIMIT },
 309         { "keep-state",         TOK_KEEPSTATE },
 310         { "record-state",       TOK_RECORDSTATE },
 311         { "bridged",            TOK_LAYER2 },
 312         { "layer2",             TOK_LAYER2 },
 313         { "out",                TOK_OUT },
 314         { "diverted",           TOK_DIVERTED },
 315         { "diverted-loopback",  TOK_DIVERTEDLOOPBACK },
 316         { "diverted-output",    TOK_DIVERTEDOUTPUT },
 317         { "xmit",               TOK_XMIT },
 318         { "recv",               TOK_RECV },
 319         { "via",                TOK_VIA },
 320         { "fragment",           TOK_FRAG },
 321         { "frag",               TOK_FRAG },
 322         { "fib",                TOK_FIB },
 323         { "ipoptions",          TOK_IPOPTS },
 324         { "ipopts",             TOK_IPOPTS },
 325         { "iplen",              TOK_IPLEN },
 326         { "ipid",               TOK_IPID },
 327         { "ipprecedence",       TOK_IPPRECEDENCE },
 328         { "dscp",               TOK_DSCP },
 329         { "iptos",              TOK_IPTOS },
 330         { "ipttl",              TOK_IPTTL },
 331         { "ipversion",          TOK_IPVER },
 332         { "ipver",              TOK_IPVER },
 333         { "estab",              TOK_ESTAB },
 334         { "established",        TOK_ESTAB },
 335         { "setup",              TOK_SETUP },
 336         { "sockarg",            TOK_SOCKARG },
 337         { "tcpdatalen",         TOK_TCPDATALEN },
 338         { "tcpflags",           TOK_TCPFLAGS },
 339         { "tcpflgs",            TOK_TCPFLAGS },
 340         { "tcpoptions",         TOK_TCPOPTS },
 341         { "tcpopts",            TOK_TCPOPTS },
 342         { "tcpseq",             TOK_TCPSEQ },
 343         { "tcpack",             TOK_TCPACK },
 344         { "tcpwin",             TOK_TCPWIN },
 345         { "icmptype",           TOK_ICMPTYPES },
 346         { "icmptypes",          TOK_ICMPTYPES },
 347         { "dst-ip",             TOK_DSTIP },
 348         { "src-ip",             TOK_SRCIP },
 349         { "dst-port",           TOK_DSTPORT },
 350         { "src-port",           TOK_SRCPORT },
 351         { "proto",              TOK_PROTO },
 352         { "MAC",                TOK_MAC },
 353         { "mac",                TOK_MAC },
 354         { "mac-type",           TOK_MACTYPE },
 355         { "verrevpath",         TOK_VERREVPATH },
 356         { "versrcreach",        TOK_VERSRCREACH },
 357         { "antispoof",          TOK_ANTISPOOF },
 358         { "ipsec",              TOK_IPSEC },
 359         { "icmp6type",          TOK_ICMP6TYPES },
 360         { "icmp6types",         TOK_ICMP6TYPES },
 361         { "ext6hdr",            TOK_EXT6HDR},
 362         { "flow-id",            TOK_FLOWID},
 363         { "ipv6",               TOK_IPV6},
 364         { "ip6",                TOK_IPV6},
 365         { "ipv4",               TOK_IPV4},
 366         { "ip4",                TOK_IPV4},
 367         { "dst-ipv6",           TOK_DSTIP6},
 368         { "dst-ip6",            TOK_DSTIP6},
 369         { "src-ipv6",           TOK_SRCIP6},
 370         { "src-ip6",            TOK_SRCIP6},
 371         { "lookup",             TOK_LOOKUP},
 372         { "flow",               TOK_FLOW},
 373         { "defer-action",       TOK_SKIPACTION },
 374         { "defer-immediate-action",     TOK_SKIPACTION },
 375         { "//",                 TOK_COMMENT },
 376
 377         { "not",                TOK_NOT },              /* pseudo option */
 378         { "!", /* escape ? */   TOK_NOT },              /* pseudo option */
 379         { "or",                 TOK_OR },               /* pseudo option */
 380         { "|", /* escape */     TOK_OR },               /* pseudo option */
 381         { "{",                  TOK_STARTBRACE },       /* pseudo option */
 382         { "(",                  TOK_STARTBRACE },       /* pseudo option */
 383         { "}",                  TOK_ENDBRACE },         /* pseudo option */
 384         { ")",                  TOK_ENDBRACE },         /* pseudo option */
 385         { NULL, 0 }     /* terminator */
 386 };
 387
 388 void bprint_uint_arg(struct buf_pr *bp, const char *str, uint32_t arg);
 389 static int ipfw_get_config(struct cmdline_opts *co, struct format_opts *fo,
 390     ipfw_cfg_lheader **pcfg, size_t *psize);
 391 static int ipfw_show_config(struct cmdline_opts *co, struct format_opts *fo,
 392     ipfw_cfg_lheader *cfg, size_t sz, int ac, char **av);
 393 static void ipfw_list_tifaces(void);
 394
 395 struct tidx;
 396 static uint16_t pack_object(struct tidx *tstate, char *name, int otype);
 397 static uint16_t pack_table(struct tidx *tstate, char *name);
 398
 399 static char *table_search_ctlv(ipfw_obj_ctlv *ctlv, uint16_t idx);
 400 static void object_sort_ctlv(ipfw_obj_ctlv *ctlv);
 401 static char *object_search_ctlv(ipfw_obj_ctlv *ctlv, uint16_t idx,
 402     uint16_t type);
 403
 404 /*
 405  * Simple string buffer API.
 406  * Used to simplify buffer passing between function and for
 407  * transparent overrun handling.
 408  */
 409
 410 /*
 411  * Allocates new buffer of given size @sz.
 412  *
 413  * Returns 0 on success.
 414  */
 415 int
 416 bp_alloc(struct buf_pr *b, size_t size)
 417 {
 418         memset(b, 0, sizeof(struct buf_pr));
 419
 420         if ((b->buf = calloc(1, size)) == NULL)
 421                 return (ENOMEM);
 422
 423         b->ptr = b->buf;
 424         b->size = size;
 425         b->avail = b->size;
 426
 427         return (0);
 428 }
 429
 430 void
 431 bp_free(struct buf_pr *b)
 432 {
 433
 434         free(b->buf);
 435 }
 436
 437 /*
 438  * Flushes buffer so new writer start from beginning.
 439  */
 440 void
 441 bp_flush(struct buf_pr *b)
 442 {
 443
 444         b->ptr = b->buf;
 445         b->avail = b->size;
 446         b->buf[0] = '\0';
 447 }
 448
 449 /*
 450  * Print message specified by @format and args.
 451  * Automatically manage buffer space and transparently handle
 452  * buffer overruns.
 453  *
 454  * Returns number of bytes that should have been printed.
 455  */
 456 int
 457 bprintf(struct buf_pr *b, char *format, ...)
 458 {
 459         va_list args;
 460         int i;
 461
 462         va_start(args, format);
 463
 464         i = vsnprintf(b->ptr, b->avail, format, args);
 465         va_end(args);
 466
 467         if (i > b->avail || i < 0) {
 468                 /* Overflow or print error */
 469                 b->avail = 0;
 470         } else {
 471                 b->ptr += i;
 472                 b->avail -= i;
 473         }
 474
 475         b->needed += i;
 476
 477         return (i);
 478 }
 479
 480 /*
 481  * Special values printer for tablearg-aware opcodes.
 482  */
 483 void
 484 bprint_uint_arg(struct buf_pr *bp, const char *str, uint32_t arg)
 485 {
 486
 487         if (str != NULL)
 488                 bprintf(bp, "%s", str);
 489         if (arg == IP_FW_TARG)
 490                 bprintf(bp, "tablearg");
 491         else
 492                 bprintf(bp, "%u", arg);
 493 }
 494
 495 /*
 496  * Helper routine to print a possibly unaligned uint64_t on
 497  * various platform. If width > 0, print the value with
 498  * the desired width, followed by a space;
 499  * otherwise, return the required width.
 500  */
 501 int
 502 pr_u64(struct buf_pr *b, uint64_t *pd, int width)
 503 {
 504 #ifdef TCC
 505 #define U64_FMT "I64"
 506 #else
 507 #define U64_FMT "llu"
 508 #endif
 509         uint64_t u;
 510         unsigned long long d;
 511
 512         bcopy (pd, &u, sizeof(u));
 513         d = u;
 514         return (width > 0) ?
 515                 bprintf(b, "%*" U64_FMT " ", width, d) :
 516                 snprintf(NULL, 0, "%" U64_FMT, d) ;
 517 #undef U64_FMT
 518 }
 519
 520
 521 void *
 522 safe_calloc(size_t number, size_t size)
 523 {
 524         void *ret = calloc(number, size);
 525
 526         if (ret == NULL)
 527                 err(EX_OSERR, "calloc");
 528         return ret;
 529 }
 530
 531 void *
 532 safe_realloc(void *ptr, size_t size)
 533 {
 534         void *ret = realloc(ptr, size);
 535
 536         if (ret == NULL)
 537                 err(EX_OSERR, "realloc");
 538         return ret;
 539 }
 540
 541 /*
 542  * Compare things like interface or table names.
 543  */
 544 int
 545 stringnum_cmp(const char *a, const char *b)
 546 {
 547         int la, lb;
 548
 549         la = strlen(a);
 550         lb = strlen(b);
 551
 552         if (la > lb)
 553                 return (1);
 554         else if (la < lb)
 555                 return (-01);
 556
 557         return (strcmp(a, b));
 558 }
 559
 560
 561 /*
 562  * conditionally runs the command.
 563  * Selected options or negative -> getsockopt
 564  */
 565 int
 566 do_cmd(int optname, void *optval, uintptr_t optlen)
 567 {
 568         int i;
 569
 570         if (co.test_only)
 571                 return 0;
 572
 573         if (ipfw_socket == -1)
 574                 ipfw_socket = socket(AF_INET, SOCK_RAW, IPPROTO_RAW);
 575         if (ipfw_socket < 0)
 576                 err(EX_UNAVAILABLE, "socket");
 577
 578         if (optname == IP_FW_GET || optname == IP_DUMMYNET_GET ||
 579             optname == IP_FW_ADD || optname == IP_FW3 ||
 580             optname == IP_FW_NAT_GET_CONFIG ||
 581             optname < 0 ||
 582             optname == IP_FW_NAT_GET_LOG) {
 583                 if (optname < 0)
 584                         optname = -optname;
 585                 i = getsockopt(ipfw_socket, IPPROTO_IP, optname, optval,
 586                         (socklen_t *)optlen);
 587         } else {
 588                 i = setsockopt(ipfw_socket, IPPROTO_IP, optname, optval, optlen);
 589         }
 590         return i;
 591 }
 592
 593 /*
 594  * do_set3 - pass ipfw control cmd to kernel
 595  * @optname: option name
 596  * @optval: pointer to option data
 597  * @optlen: option length
 598  *
 599  * Assumes op3 header is already embedded.
 600  * Calls setsockopt() with IP_FW3 as kernel-visible opcode.
 601  * Returns 0 on success or errno otherwise.
 602  */
 603 int
 604 do_set3(int optname, ip_fw3_opheader *op3, size_t optlen)
 605 {
 606
 607         if (co.test_only)
 608                 return (0);
 609
 610         if (ipfw_socket == -1)
 611                 ipfw_socket = socket(AF_INET, SOCK_RAW, IPPROTO_RAW);
 612         if (ipfw_socket < 0)
 613                 err(EX_UNAVAILABLE, "socket");
 614
 615         op3->opcode = optname;
 616
 617         return (setsockopt(ipfw_socket, IPPROTO_IP, IP_FW3, op3, optlen));
 618 }
 619
 620 /*
 621  * do_get3 - pass ipfw control cmd to kernel
 622  * @optname: option name
 623  * @optval: pointer to option data
 624  * @optlen: pointer to option length
 625  *
 626  * Assumes op3 header is already embedded.
 627  * Calls getsockopt() with IP_FW3 as kernel-visible opcode.
 628  * Returns 0 on success or errno otherwise.
 629  */
 630 int
 631 do_get3(int optname, ip_fw3_opheader *op3, size_t *optlen)
 632 {
 633         int error;
 634         socklen_t len;
 635
 636         if (co.test_only)
 637                 return (0);
 638
 639         if (ipfw_socket == -1)
 640                 ipfw_socket = socket(AF_INET, SOCK_RAW, IPPROTO_RAW);
 641         if (ipfw_socket < 0)
 642                 err(EX_UNAVAILABLE, "socket");
 643
 644         op3->opcode = optname;
 645
 646         len = *optlen;
 647         error = getsockopt(ipfw_socket, IPPROTO_IP, IP_FW3, op3, &len);
 648         *optlen = len;
 649
 650         return (error);
 651 }
 652
 653 /**
 654  * match_token takes a table and a string, returns the value associated
 655  * with the string (-1 in case of failure).
 656  */
 657 int
 658 match_token(struct _s_x *table, const char *string)
 659 {
 660         struct _s_x *pt;
 661         uint i = strlen(string);
 662
 663         for (pt = table ; i && pt->s != NULL ; pt++)
 664                 if (strlen(pt->s) == i && !bcmp(string, pt->s, i))
 665                         return pt->x;
 666         return (-1);
 667 }
 668
 669 /**
 670  * match_token_relaxed takes a table and a string, returns the value associated
 671  * with the string for the best match.
 672  *
 673  * Returns:
 674  * value from @table for matched records
 675  * -1 for non-matched records
 676  * -2 if more than one records match @string.
 677  */
 678 int
 679 match_token_relaxed(struct _s_x *table, const char *string)
 680 {
 681         struct _s_x *pt, *m;
 682         int i, c;
 683
 684         i = strlen(string);
 685         c = 0;
 686
 687         for (pt = table ; i != 0 && pt->s != NULL ; pt++) {
 688                 if (strncmp(pt->s, string, i) != 0)
 689                         continue;
 690                 m = pt;
 691                 c++;
 692         }
 693
 694         if (c == 1)
 695                 return (m->x);
 696
 697         return (c > 0 ? -2: -1);
 698 }
 699
 700 int
 701 get_token(struct _s_x *table, const char *string, const char *errbase)
 702 {
 703         int tcmd;
 704
 705         if ((tcmd = match_token_relaxed(table, string)) < 0)
 706                 errx(EX_USAGE, "%s %s %s",
 707                     (tcmd == 0) ? "invalid" : "ambiguous", errbase, string);
 708
 709         return (tcmd);
 710 }
 711
 712 /**
 713  * match_value takes a table and a value, returns the string associated
 714  * with the value (NULL in case of failure).
 715  */
 716 char const *
 717 match_value(struct _s_x *p, int value)
 718 {
 719         for (; p->s != NULL; p++)
 720                 if (p->x == value)
 721                         return p->s;
 722         return NULL;
 723 }
 724
 725 size_t
 726 concat_tokens(char *buf, size_t bufsize, struct _s_x *table, char *delimiter)
 727 {
 728         struct _s_x *pt;
 729         int l;
 730         size_t sz;
 731
 732         for (sz = 0, pt = table ; pt->s != NULL; pt++) {
 733                 l = snprintf(buf + sz, bufsize - sz, "%s%s",
 734                     (sz == 0) ? "" : delimiter, pt->s);
 735                 sz += l;
 736                 bufsize += l;
 737                 if (sz > bufsize)
 738                         return (bufsize);
 739         }
 740
 741         return (sz);
 742 }
 743
 744 /*
 745  * helper function to process a set of flags and set bits in the
 746  * appropriate masks.
 747  */
 748 int
 749 fill_flags(struct _s_x *flags, char *p, char **e, uint32_t *set,
 750     uint32_t *clear)
 751 {
 752         char *q;        /* points to the separator */
 753         int val;
 754         uint32_t *which;        /* mask we are working on */
 755
 756         while (p && *p) {
 757                 if (*p == '!') {
 758                         p++;
 759                         which = clear;
 760                 } else
 761                         which = set;
 762                 q = strchr(p, ',');
 763                 if (q)
 764                         *q++ = '\0';
 765                 val = match_token(flags, p);
 766                 if (val <= 0) {
 767                         if (e != NULL)
 768                                 *e = p;
 769                         return (-1);
 770                 }
 771                 *which |= (uint32_t)val;
 772                 p = q;
 773         }
 774         return (0);
 775 }
 776
 777 void
 778 print_flags_buffer(char *buf, size_t sz, struct _s_x *list, uint32_t set)
 779 {
 780         char const *comma = "";
 781         int i, l;
 782
 783         for (i = 0; list[i].x != 0; i++) {
 784                 if ((set & list[i].x) == 0)
 785                         continue;
 786
 787                 set &= ~list[i].x;
 788                 l = snprintf(buf, sz, "%s%s", comma, list[i].s);
 789                 if (l >= sz)
 790                         return;
 791                 comma = ",";
 792                 buf += l;
 793                 sz -=l;
 794         }
 795 }
 796
 797 /*
 798  * _substrcmp takes two strings and returns 1 if they do not match,
 799  * and 0 if they match exactly or the first string is a sub-string
 800  * of the second.  A warning is printed to stderr in the case that the
 801  * first string is a sub-string of the second.
 802  *
 803  * This function will be removed in the future through the usual
 804  * deprecation process.
 805  */
 806 int
 807 _substrcmp(const char *str1, const char* str2)
 808 {
 809
 810         if (strncmp(str1, str2, strlen(str1)) != 0)
 811                 return 1;
 812
 813         if (strlen(str1) != strlen(str2))
 814                 warnx("DEPRECATED: '%s' matched '%s' as a sub-string",
 815                     str1, str2);
 816         return 0;
 817 }
 818
 819 /*
 820  * _substrcmp2 takes three strings and returns 1 if the first two do not match,
 821  * and 0 if they match exactly or the second string is a sub-string
 822  * of the first.  A warning is printed to stderr in the case that the
 823  * first string does not match the third.
 824  *
 825  * This function exists to warn about the bizarre construction
 826  * strncmp(str, "by", 2) which is used to allow people to use a shortcut
 827  * for "bytes".  The problem is that in addition to accepting "by",
 828  * "byt", "byte", and "bytes", it also excepts "by_rabid_dogs" and any
 829  * other string beginning with "by".
 830  *
 831  * This function will be removed in the future through the usual
 832  * deprecation process.
 833  */
 834 int
 835 _substrcmp2(const char *str1, const char* str2, const char* str3)
 836 {
 837
 838         if (strncmp(str1, str2, strlen(str2)) != 0)
 839                 return 1;
 840
 841         if (strcmp(str1, str3) != 0)
 842                 warnx("DEPRECATED: '%s' matched '%s'",
 843                     str1, str3);
 844         return 0;
 845 }
 846
 847 /*
 848  * prints one port, symbolic or numeric
 849  */
 850 static void
 851 print_port(struct buf_pr *bp, int proto, uint16_t port)
 852 {
 853
 854         if (proto == IPPROTO_ETHERTYPE) {
 855                 char const *s;
 856
 857                 if (co.do_resolv && (s = match_value(ether_types, port)) )
 858                         bprintf(bp, "%s", s);
 859                 else
 860                         bprintf(bp, "0x%04x", port);
 861         } else {
 862                 struct servent *se = NULL;
 863                 if (co.do_resolv) {
 864                         struct protoent *pe = getprotobynumber(proto);
 865
 866                         se = getservbyport(htons(port), pe ? pe->p_name : NULL);
 867                 }
 868                 if (se)
 869                         bprintf(bp, "%s", se->s_name);
 870                 else
 871                         bprintf(bp, "%d", port);
 872         }
 873 }
 874
 875 static struct _s_x _port_name[] = {
 876         {"dst-port",    O_IP_DSTPORT},
 877         {"src-port",    O_IP_SRCPORT},
 878         {"ipid",        O_IPID},
 879         {"iplen",       O_IPLEN},
 880         {"ipttl",       O_IPTTL},
 881         {"mac-type",    O_MAC_TYPE},
 882         {"tcpdatalen",  O_TCPDATALEN},
 883         {"tcpwin",      O_TCPWIN},
 884         {"tagged",      O_TAGGED},
 885         {NULL,          0}
 886 };
 887
 888 /*
 889  * Print the values in a list 16-bit items of the types above.
 890  * XXX todo: add support for mask.
 891  */
 892 static void
 893 print_newports(struct buf_pr *bp, ipfw_insn_u16 *cmd, int proto, int opcode)
 894 {
 895         uint16_t *p = cmd->ports;
 896         int i;
 897         char const *sep;
 898
 899         if (opcode != 0) {
 900                 sep = match_value(_port_name, opcode);
 901                 if (sep == NULL)
 902                         sep = "???";
 903                 bprintf(bp, " %s", sep);
 904         }
 905         sep = " ";
 906         for (i = F_LEN((ipfw_insn *)cmd) - 1; i > 0; i--, p += 2) {
 907                 bprintf(bp, "%s", sep);
 908                 print_port(bp, proto, p[0]);
 909                 if (p[0] != p[1]) {
 910                         bprintf(bp, "-");
 911                         print_port(bp, proto, p[1]);
 912                 }
 913                 sep = ",";
 914         }
 915 }
 916
 917 /*
 918  * Like strtol, but also translates service names into port numbers
 919  * for some protocols.
 920  * In particular:
 921  *      proto == -1 disables the protocol check;
 922  *      proto == IPPROTO_ETHERTYPE looks up an internal table
 923  *      proto == <some value in /etc/protocols> matches the values there.
 924  * Returns *end == s in case the parameter is not found.
 925  */
 926 static int
 927 strtoport(char *s, char **end, int base, int proto)
 928 {
 929         char *p, *buf;
 930         char *s1;
 931         int i;
 932
 933         *end = s;               /* default - not found */
 934         if (*s == '\0')
 935                 return 0;       /* not found */
 936
 937         if (isdigit(*s))
 938                 return strtol(s, end, base);
 939
 940         /*
 941          * find separator. '\\' escapes the next char.
 942          */
 943         for (s1 = s; *s1 && (isalnum(*s1) || *s1 == '\\' ||
 944             *s1 == '_' || *s1 == '.') ; s1++)
 945                 if (*s1 == '\\' && s1[1] != '\0')
 946                         s1++;
 947
 948         buf = safe_calloc(s1 - s + 1, 1);
 949
 950         /*
 951          * copy into a buffer skipping backslashes
 952          */
 953         for (p = s, i = 0; p != s1 ; p++)
 954                 if (*p != '\\')
 955                         buf[i++] = *p;
 956         buf[i++] = '\0';
 957
 958         if (proto == IPPROTO_ETHERTYPE) {
 959                 i = match_token(ether_types, buf);
 960                 free(buf);
 961                 if (i != -1) {  /* found */
 962                         *end = s1;
 963                         return i;
 964                 }
 965         } else {
 966                 struct protoent *pe = NULL;
 967                 struct servent *se;
 968
 969                 if (proto != 0)
 970                         pe = getprotobynumber(proto);
 971                 setservent(1);
 972                 se = getservbyname(buf, pe ? pe->p_name : NULL);
 973                 free(buf);
 974                 if (se != NULL) {
 975                         *end = s1;
 976                         return ntohs(se->s_port);
 977                 }
 978         }
 979         return 0;       /* not found */
 980 }
 981
 982 /*
 983  * Fill the body of the command with the list of port ranges.
 984  */
 985 static int
 986 fill_newports(ipfw_insn_u16 *cmd, char *av, int proto, int cblen)
 987 {
 988         uint16_t a, b, *p = cmd->ports;
 989         int i = 0;
 990         char *s = av;
 991
 992         while (*s) {
 993                 a = strtoport(av, &s, 0, proto);
 994                 if (s == av)                    /* empty or invalid argument */
 995                         return (0);
 996
 997                 CHECK_LENGTH(cblen, i + 2);
 998
 999                 switch (*s) {
1000                 case '-':                       /* a range */
1001                         av = s + 1;
1002                         b = strtoport(av, &s, 0, proto);
1003                         /* Reject expressions like '1-abc' or '1-2-3'. */
1004                         if (s == av || (*s != ',' && *s != '\0'))
1005                                 return (0);
1006                         p[0] = a;
1007                         p[1] = b;
1008                         break;
1009                 case ',':                       /* comma separated list */
1010                 case '\0':
1011                         p[0] = p[1] = a;
1012                         break;
1013                 default:
1014                         warnx("port list: invalid separator <%c> in <%s>",
1015                                 *s, av);
1016                         return (0);
1017                 }
1018
1019                 i++;
1020                 p += 2;
1021                 av = s + 1;
1022         }
1023         if (i > 0) {
1024                 if (i + 1 > F_LEN_MASK)
1025                         errx(EX_DATAERR, "too many ports/ranges\n");
1026                 cmd->o.len |= i + 1;    /* leave F_NOT and F_OR untouched */
1027         }
1028         return (i);
1029 }
1030
1031 /*
1032  * Fill the body of the command with the list of DiffServ codepoints.
1033  */
1034 static void
1035 fill_dscp(ipfw_insn *cmd, char *av, int cblen)
1036 {
1037         uint32_t *low, *high;
1038         char *s = av, *a;
1039         int code;
1040
1041         cmd->opcode = O_DSCP;
1042         cmd->len |= F_INSN_SIZE(ipfw_insn_u32) + 1;
1043
1044         CHECK_CMDLEN;
1045
1046         low = (uint32_t *)(cmd + 1);
1047         high = low + 1;
1048
1049         *low = 0;
1050         *high = 0;
1051
1052         while (s != NULL) {
1053                 a = strchr(s, ',');
1054
1055                 if (a != NULL)
1056                         *a++ = '\0';
1057
1058                 if (isalpha(*s)) {
1059                         if ((code = match_token(f_ipdscp, s)) == -1)
1060                                 errx(EX_DATAERR, "Unknown DSCP code");
1061                 } else {
1062                         code = strtoul(s, NULL, 10);
1063                         if (code < 0 || code > 63)
1064                                 errx(EX_DATAERR, "Invalid DSCP value");
1065                 }
1066
1067                 if (code >= 32)
1068                         *high |= 1 << (code - 32);
1069                 else
1070                         *low |= 1 << code;
1071
1072                 s = a;
1073         }
1074 }
1075
1076 static struct _s_x icmpcodes[] = {
1077       { "net",                  ICMP_UNREACH_NET },
1078       { "host",                 ICMP_UNREACH_HOST },
1079       { "protocol",             ICMP_UNREACH_PROTOCOL },
1080       { "port",                 ICMP_UNREACH_PORT },
1081       { "needfrag",             ICMP_UNREACH_NEEDFRAG },
1082       { "srcfail",              ICMP_UNREACH_SRCFAIL },
1083       { "net-unknown",          ICMP_UNREACH_NET_UNKNOWN },
1084       { "host-unknown",         ICMP_UNREACH_HOST_UNKNOWN },
1085       { "isolated",             ICMP_UNREACH_ISOLATED },
1086       { "net-prohib",           ICMP_UNREACH_NET_PROHIB },
1087       { "host-prohib",          ICMP_UNREACH_HOST_PROHIB },
1088       { "tosnet",               ICMP_UNREACH_TOSNET },
1089       { "toshost",              ICMP_UNREACH_TOSHOST },
1090       { "filter-prohib",        ICMP_UNREACH_FILTER_PROHIB },
1091       { "host-precedence",      ICMP_UNREACH_HOST_PRECEDENCE },
1092       { "precedence-cutoff",    ICMP_UNREACH_PRECEDENCE_CUTOFF },
1093       { NULL, 0 }
1094 };
1095
1096 static void
1097 fill_reject_code(u_short *codep, char *str)
1098 {
1099         int val;
1100         char *s;
1101
1102         val = strtoul(str, &s, 0);
1103         if (s == str || *s != '\0' || val >= 0x100)
1104                 val = match_token(icmpcodes, str);
1105         if (val < 0)
1106                 errx(EX_DATAERR, "unknown ICMP unreachable code ``%s''", str);
1107         *codep = val;
1108         return;
1109 }
1110
1111 static void
1112 print_reject_code(struct buf_pr *bp, uint16_t code)
1113 {
1114         char const *s;
1115
1116         if ((s = match_value(icmpcodes, code)) != NULL)
1117                 bprintf(bp, "unreach %s", s);
1118         else
1119                 bprintf(bp, "unreach %u", code);
1120 }
1121
1122 /*
1123  * Returns the number of bits set (from left) in a contiguous bitmask,
1124  * or -1 if the mask is not contiguous.
1125  * XXX this needs a proper fix.
1126  * This effectively works on masks in big-endian (network) format.
1127  * when compiled on little endian architectures.
1128  *
1129  * First bit is bit 7 of the first byte -- note, for MAC addresses,
1130  * the first bit on the wire is bit 0 of the first byte.
1131  * len is the max length in bits.
1132  */
1133 int
1134 contigmask(uint8_t *p, int len)
1135 {
1136         int i, n;
1137
1138         for (i=0; i<len ; i++)
1139                 if ( (p[i/8] & (1 << (7 - (i%8)))) == 0) /* first bit unset */
1140                         break;
1141         for (n=i+1; n < len; n++)
1142                 if ( (p[n/8] & (1 << (7 - (n%8)))) != 0)
1143                         return -1; /* mask not contiguous */
1144         return i;
1145 }
1146
1147 /*
1148  * print flags set/clear in the two bitmasks passed as parameters.
1149  * There is a specialized check for f_tcpflags.
1150  */
1151 static void
1152 print_flags(struct buf_pr *bp, char const *name, ipfw_insn *cmd,
1153     struct _s_x *list)
1154 {
1155         char const *comma = "";
1156         int i;
1157         uint8_t set = cmd->arg1 & 0xff;
1158         uint8_t clear = (cmd->arg1 >> 8) & 0xff;
1159
1160         if (list == f_tcpflags && set == TH_SYN && clear == TH_ACK) {
1161                 bprintf(bp, " setup");
1162                 return;
1163         }
1164
1165         bprintf(bp, " %s ", name);
1166         for (i=0; list[i].x != 0; i++) {
1167                 if (set & list[i].x) {
1168                         set &= ~list[i].x;
1169                         bprintf(bp, "%s%s", comma, list[i].s);
1170                         comma = ",";
1171                 }
1172                 if (clear & list[i].x) {
1173                         clear &= ~list[i].x;
1174                         bprintf(bp, "%s!%s", comma, list[i].s);
1175                         comma = ",";
1176                 }
1177         }
1178 }
1179
1180
1181 /*
1182  * Print the ip address contained in a command.
1183  */
1184 static void
1185 print_ip(struct buf_pr *bp, const struct format_opts *fo, ipfw_insn_ip *cmd)
1186 {
1187         struct hostent *he = NULL;
1188         struct in_addr *ia;
1189         uint32_t len = F_LEN((ipfw_insn *)cmd);
1190         uint32_t *a = ((ipfw_insn_u32 *)cmd)->d;
1191         char *t;
1192
1193         bprintf(bp, " ");
1194         if (cmd->o.opcode == O_IP_DST_LOOKUP && len > F_INSN_SIZE(ipfw_insn_u32)) {
1195                 uint32_t d = a[1];
1196                 const char *arg = "<invalid>";
1197
1198                 if (d < sizeof(lookup_key)/sizeof(lookup_key[0]))
1199                         arg = match_value(rule_options, lookup_key[d]);
1200                 t = table_search_ctlv(fo->tstate, ((ipfw_insn *)cmd)->arg1);
1201                 bprintf(bp, "lookup %s %s", arg, t);
1202                 return;
1203         }
1204         if (cmd->o.opcode == O_IP_SRC_ME || cmd->o.opcode == O_IP_DST_ME) {
1205                 bprintf(bp, "me");
1206                 return;
1207         }
1208         if (cmd->o.opcode == O_IP_SRC_LOOKUP ||
1209             cmd->o.opcode == O_IP_DST_LOOKUP) {
1210                 t = table_search_ctlv(fo->tstate, ((ipfw_insn *)cmd)->arg1);
1211                 bprintf(bp, "table(%s", t);
1212                 if (len == F_INSN_SIZE(ipfw_insn_u32))
1213                         bprintf(bp, ",%u", *a);
1214                 bprintf(bp, ")");
1215                 return;
1216         }
1217         if (cmd->o.opcode == O_IP_SRC_SET || cmd->o.opcode == O_IP_DST_SET) {
1218                 uint32_t x, *map = (uint32_t *)&(cmd->mask);
1219                 int i, j;
1220                 char comma = '{';
1221
1222                 x = cmd->o.arg1 - 1;
1223                 x = htonl( ~x );
1224                 cmd->addr.s_addr = htonl(cmd->addr.s_addr);
1225                 bprintf(bp, "%s/%d", inet_ntoa(cmd->addr),
1226                         contigmask((uint8_t *)&x, 32));
1227                 x = cmd->addr.s_addr = htonl(cmd->addr.s_addr);
1228                 x &= 0xff; /* base */
1229                 /*
1230                  * Print bits and ranges.
1231                  * Locate first bit set (i), then locate first bit unset (j).
1232                  * If we have 3+ consecutive bits set, then print them as a
1233                  * range, otherwise only print the initial bit and rescan.
1234                  */
1235                 for (i=0; i < cmd->o.arg1; i++)
1236                         if (map[i/32] & (1<<(i & 31))) {
1237                                 for (j=i+1; j < cmd->o.arg1; j++)
1238                                         if (!(map[ j/32] & (1<<(j & 31))))
1239                                                 break;
1240                                 bprintf(bp, "%c%d", comma, i+x);
1241                                 if (j>i+2) { /* range has at least 3 elements */
1242                                         bprintf(bp, "-%d", j-1+x);
1243                                         i = j-1;
1244                                 }
1245                                 comma = ',';
1246                         }
1247                 bprintf(bp, "}");
1248                 return;
1249         }
1250         /*
1251          * len == 2 indicates a single IP, whereas lists of 1 or more
1252          * addr/mask pairs have len = (2n+1). We convert len to n so we
1253          * use that to count the number of entries.
1254          */
1255     for (len = len / 2; len > 0; len--, a += 2) {
1256         int mb =        /* mask length */
1257             (cmd->o.opcode == O_IP_SRC || cmd->o.opcode == O_IP_DST) ?
1258                 32 : contigmask((uint8_t *)&(a[1]), 32);
1259         if (mb == 32 && co.do_resolv)
1260                 he = gethostbyaddr((char *)&(a[0]), sizeof(in_addr_t),
1261                     AF_INET);
1262         if (he != NULL)         /* resolved to name */
1263                 bprintf(bp, "%s", he->h_name);
1264         else if (mb == 0)       /* any */
1265                 bprintf(bp, "any");
1266         else {          /* numeric IP followed by some kind of mask */
1267                 ia = (struct in_addr *)&a[0];
1268                 bprintf(bp, "%s", inet_ntoa(*ia));
1269                 if (mb < 0) {
1270                         ia = (struct in_addr *)&a[1];
1271                         bprintf(bp, ":%s", inet_ntoa(*ia));
1272                 } else if (mb < 32)
1273                         bprintf(bp, "/%d", mb);
1274         }
1275         if (len > 1)
1276                 bprintf(bp, ",");
1277     }
1278 }
1279
1280 /*
1281  * prints a MAC address/mask pair
1282  */
1283 static void
1284 format_mac(struct buf_pr *bp, uint8_t *addr, uint8_t *mask)
1285 {
1286         int l = contigmask(mask, 48);
1287
1288         if (l == 0)
1289                 bprintf(bp, " any");
1290         else {
1291                 bprintf(bp, " %02x:%02x:%02x:%02x:%02x:%02x",
1292                     addr[0], addr[1], addr[2], addr[3], addr[4], addr[5]);
1293                 if (l == -1)
1294                         bprintf(bp, "&%02x:%02x:%02x:%02x:%02x:%02x",
1295                             mask[0], mask[1], mask[2],
1296                             mask[3], mask[4], mask[5]);
1297                 else if (l < 48)
1298                         bprintf(bp, "/%d", l);
1299         }
1300 }
1301
1302 static void
1303 print_mac(struct buf_pr *bp, ipfw_insn_mac *mac)
1304 {
1305
1306         bprintf(bp, " MAC");
1307         format_mac(bp, mac->addr, mac->mask);
1308         format_mac(bp, mac->addr + 6, mac->mask + 6);
1309 }
1310
1311 static void
1312 fill_icmptypes(ipfw_insn_u32 *cmd, char *av)
1313 {
1314         uint8_t type;
1315
1316         cmd->d[0] = 0;
1317         while (*av) {
1318                 if (*av == ',')
1319                         av++;
1320
1321                 type = strtoul(av, &av, 0);
1322
1323                 if (*av != ',' && *av != '\0')
1324                         errx(EX_DATAERR, "invalid ICMP type");
1325
1326                 if (type > 31)
1327                         errx(EX_DATAERR, "ICMP type out of range");
1328
1329                 cmd->d[0] |= 1 << type;
1330         }
1331         cmd->o.opcode = O_ICMPTYPE;
1332         cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32);
1333 }
1334
1335 static void
1336 print_icmptypes(struct buf_pr *bp, ipfw_insn_u32 *cmd)
1337 {
1338         int i;
1339         char sep= ' ';
1340
1341         bprintf(bp, " icmptypes");
1342         for (i = 0; i < 32; i++) {
1343                 if ( (cmd->d[0] & (1 << (i))) == 0)
1344                         continue;
1345                 bprintf(bp, "%c%d", sep, i);
1346                 sep = ',';
1347         }
1348 }
1349
1350 static void
1351 print_dscp(struct buf_pr *bp, ipfw_insn_u32 *cmd)
1352 {
1353         int i = 0;
1354         uint32_t *v;
1355         char sep= ' ';
1356         const char *code;
1357
1358         bprintf(bp, " dscp");
1359         v = cmd->d;
1360         while (i < 64) {
1361                 if (*v & (1 << i)) {
1362                         if ((code = match_value(f_ipdscp, i)) != NULL)
1363                                 bprintf(bp, "%c%s", sep, code);
1364                         else
1365                                 bprintf(bp, "%c%d", sep, i);
1366                         sep = ',';
1367                 }
1368
1369                 if ((++i % 32) == 0)
1370                         v++;
1371         }
1372 }
1373
1374 #define insntod(cmd, type)      ((ipfw_insn_ ## type *)(cmd))
1375 struct show_state {
1376         struct ip_fw_rule       *rule;
1377         const ipfw_insn         *eaction;
1378         uint8_t                 *printed;
1379         int                     flags;
1380 #define HAVE_PROTO              0x0001
1381 #define HAVE_SRCIP              0x0002
1382 #define HAVE_DSTIP              0x0004
1383 #define HAVE_PROBE_STATE        0x0008
1384         int                     proto;
1385         int                     or_block;
1386 };
1387
1388 static int
1389 init_show_state(struct show_state *state, struct ip_fw_rule *rule)
1390 {
1391
1392         state->printed = calloc(rule->cmd_len, sizeof(uint8_t));
1393         if (state->printed == NULL)
1394                 return (ENOMEM);
1395         state->rule = rule;
1396         state->eaction = NULL;
1397         state->flags = 0;
1398         state->proto = 0;
1399         state->or_block = 0;
1400         return (0);
1401 }
1402
1403 static void
1404 free_show_state(struct show_state *state)
1405 {
1406
1407         free(state->printed);
1408 }
1409
1410 static uint8_t
1411 is_printed_opcode(struct show_state *state, const ipfw_insn *cmd)
1412 {
1413
1414         return (state->printed[cmd - state->rule->cmd]);
1415 }
1416
1417 static void
1418 mark_printed(struct show_state *state, const ipfw_insn *cmd)
1419 {
1420
1421         state->printed[cmd - state->rule->cmd] = 1;
1422 }
1423
1424 static void
1425 print_limit_mask(struct buf_pr *bp, const ipfw_insn_limit *limit)
1426 {
1427         struct _s_x *p = limit_masks;
1428         char const *comma = " ";
1429         uint8_t x;
1430
1431         for (x = limit->limit_mask; p->x != 0; p++) {
1432                 if ((x & p->x) == p->x) {
1433                         x &= ~p->x;
1434                         bprintf(bp, "%s%s", comma, p->s);
1435                         comma = ",";
1436                 }
1437         }
1438         bprint_uint_arg(bp, " ", limit->conn_limit);
1439 }
1440
1441 static int
1442 print_instruction(struct buf_pr *bp, const struct format_opts *fo,
1443     struct show_state *state, ipfw_insn *cmd)
1444 {
1445         struct protoent *pe;
1446         struct passwd *pwd;
1447         struct group *grp;
1448         const char *s;
1449         double d;
1450
1451         if (is_printed_opcode(state, cmd))
1452                 return (0);
1453         if ((cmd->len & F_OR) != 0 && state->or_block == 0)
1454                 bprintf(bp, " {");
1455         if (cmd->opcode != O_IN && (cmd->len & F_NOT) != 0)
1456                 bprintf(bp, " not");
1457
1458         switch (cmd->opcode) {
1459         case O_PROB:
1460                 d = 1.0 * insntod(cmd, u32)->d[0] / 0x7fffffff;
1461                 bprintf(bp, "prob %f ", d);
1462                 break;
1463         case O_PROBE_STATE: /* no need to print anything here */
1464                 state->flags |= HAVE_PROBE_STATE;
1465                 break;
1466         case O_IP_SRC:
1467         case O_IP_SRC_LOOKUP:
1468         case O_IP_SRC_MASK:
1469         case O_IP_SRC_ME:
1470         case O_IP_SRC_SET:
1471                 if (state->flags & HAVE_SRCIP)
1472                         bprintf(bp, " src-ip");
1473                 print_ip(bp, fo, insntod(cmd, ip));
1474                 break;
1475         case O_IP_DST:
1476         case O_IP_DST_LOOKUP:
1477         case O_IP_DST_MASK:
1478         case O_IP_DST_ME:
1479         case O_IP_DST_SET:
1480                 if (state->flags & HAVE_DSTIP)
1481                         bprintf(bp, " dst-ip");
1482                 print_ip(bp, fo, insntod(cmd, ip));
1483                 break;
1484         case O_IP6_SRC:
1485         case O_IP6_SRC_MASK:
1486         case O_IP6_SRC_ME:
1487                 if (state->flags & HAVE_SRCIP)
1488                         bprintf(bp, " src-ip6");
1489                 print_ip6(bp, insntod(cmd, ip6));
1490                 break;
1491         case O_IP6_DST:
1492         case O_IP6_DST_MASK:
1493         case O_IP6_DST_ME:
1494                 if (state->flags & HAVE_DSTIP)
1495                         bprintf(bp, " dst-ip6");
1496                 print_ip6(bp, insntod(cmd, ip6));
1497                 break;
1498         case O_FLOW6ID:
1499                 print_flow6id(bp, insntod(cmd, u32));
1500                 break;
1501         case O_IP_DSTPORT:
1502         case O_IP_SRCPORT:
1503                 print_newports(bp, insntod(cmd, u16), state->proto,
1504                     (state->flags & (HAVE_SRCIP | HAVE_DSTIP)) ==
1505                     (HAVE_SRCIP | HAVE_DSTIP) ?  cmd->opcode: 0);
1506                 break;
1507         case O_PROTO:
1508                 pe = getprotobynumber(cmd->arg1);
1509                 if (state->flags & HAVE_PROTO)
1510                         bprintf(bp, " proto");
1511                 if (pe != NULL)
1512                         bprintf(bp, " %s", pe->p_name);
1513                 else
1514                         bprintf(bp, " %u", cmd->arg1);
1515                 state->proto = cmd->arg1;
1516                 break;
1517         case O_MACADDR2:
1518                 print_mac(bp, insntod(cmd, mac));
1519                 break;
1520         case O_MAC_TYPE:
1521                 print_newports(bp, insntod(cmd, u16),
1522                     IPPROTO_ETHERTYPE, cmd->opcode);
1523                 break;
1524         case O_FRAG:
1525                 bprintf(bp, " frag");
1526                 break;
1527         case O_FIB:
1528                 bprintf(bp, " fib %u", cmd->arg1);
1529                 break;
1530         case O_SOCKARG:
1531                 bprintf(bp, " sockarg");
1532                 break;
1533         case O_IN:
1534                 bprintf(bp, cmd->len & F_NOT ? " out" : " in");
1535                 break;
1536         case O_DIVERTED:
1537                 switch (cmd->arg1) {
1538                 case 3:
1539                         bprintf(bp, " diverted");
1540                         break;
1541                 case 2:
1542                         bprintf(bp, " diverted-output");
1543                         break;
1544                 case 1:
1545                         bprintf(bp, " diverted-loopback");
1546                         break;
1547                 default:
1548                         bprintf(bp, " diverted-?<%u>", cmd->arg1);
1549                         break;
1550                 }
1551                 break;
1552         case O_LAYER2:
1553                 bprintf(bp, " layer2");
1554                 break;
1555         case O_XMIT:
1556         case O_RECV:
1557         case O_VIA:
1558                 if (cmd->opcode == O_XMIT)
1559                         s = "xmit";
1560                 else if (cmd->opcode == O_RECV)
1561                         s = "recv";
1562                 else /* if (cmd->opcode == O_VIA) */
1563                         s = "via";
1564                 switch (insntod(cmd, if)->name[0]) {
1565                 case '\0':
1566                         bprintf(bp, " %s %s", s,
1567                             inet_ntoa(insntod(cmd, if)->p.ip));
1568                         break;
1569                 case '\1':
1570                         bprintf(bp, " %s table(%s)", s,
1571                             table_search_ctlv(fo->tstate,
1572                             insntod(cmd, if)->p.kidx));
1573                         break;
1574                 default:
1575                         bprintf(bp, " %s %s", s,
1576                             insntod(cmd, if)->name);
1577                 }
1578                 break;
1579         case O_IP_FLOW_LOOKUP:
1580                 s = table_search_ctlv(fo->tstate, cmd->arg1);
1581                 bprintf(bp, " flow table(%s", s);
1582                 if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_u32))
1583                         bprintf(bp, ",%u", insntod(cmd, u32)->d[0]);
1584                 bprintf(bp, ")");
1585                 break;
1586         case O_IPID:
1587         case O_IPTTL:
1588         case O_IPLEN:
1589         case O_TCPDATALEN:
1590         case O_TCPWIN:
1591                 if (F_LEN(cmd) == 1) {
1592                         switch (cmd->opcode) {
1593                         case O_IPID:
1594                                 s = "ipid";
1595                                 break;
1596                         case O_IPTTL:
1597                                 s = "ipttl";
1598                                 break;
1599                         case O_IPLEN:
1600                                 s = "iplen";
1601                                 break;
1602                         case O_TCPDATALEN:
1603                                 s = "tcpdatalen";
1604                                 break;
1605                         case O_TCPWIN:
1606                                 s = "tcpwin";
1607                                 break;
1608                         }
1609                         bprintf(bp, " %s %u", s, cmd->arg1);
1610                 } else
1611                         print_newports(bp, insntod(cmd, u16), 0,
1612                             cmd->opcode);
1613                 break;
1614         case O_IPVER:
1615                 bprintf(bp, " ipver %u", cmd->arg1);
1616                 break;
1617         case O_IPPRECEDENCE:
1618                 bprintf(bp, " ipprecedence %u", cmd->arg1 >> 5);
1619                 break;
1620         case O_DSCP:
1621                 print_dscp(bp, insntod(cmd, u32));
1622                 break;
1623         case O_IPOPT:
1624                 print_flags(bp, "ipoptions", cmd, f_ipopts);
1625                 break;
1626         case O_IPTOS:
1627                 print_flags(bp, "iptos", cmd, f_iptos);
1628                 break;
1629         case O_ICMPTYPE:
1630                 print_icmptypes(bp, insntod(cmd, u32));
1631                 break;
1632         case O_ESTAB:
1633                 bprintf(bp, " established");
1634                 break;
1635         case O_TCPFLAGS:
1636                 print_flags(bp, "tcpflags", cmd, f_tcpflags);
1637                 break;
1638         case O_TCPOPTS:
1639                 print_flags(bp, "tcpoptions", cmd, f_tcpopts);
1640                 break;
1641         case O_TCPACK:
1642                 bprintf(bp, " tcpack %d",
1643                     ntohl(insntod(cmd, u32)->d[0]));
1644                 break;
1645         case O_TCPSEQ:
1646                 bprintf(bp, " tcpseq %d",
1647                     ntohl(insntod(cmd, u32)->d[0]));
1648                 break;
1649         case O_UID:
1650                 pwd = getpwuid(insntod(cmd, u32)->d[0]);
1651                 if (pwd != NULL)
1652                         bprintf(bp, " uid %s", pwd->pw_name);
1653                 else
1654                         bprintf(bp, " uid %u",
1655                             insntod(cmd, u32)->d[0]);
1656                 break;
1657         case O_GID:
1658                 grp = getgrgid(insntod(cmd, u32)->d[0]);
1659                 if (grp != NULL)
1660                         bprintf(bp, " gid %s", grp->gr_name);
1661                 else
1662                         bprintf(bp, " gid %u",
1663                             insntod(cmd, u32)->d[0]);
1664                 break;
1665         case O_JAIL:
1666                 bprintf(bp, " jail %d", insntod(cmd, u32)->d[0]);
1667                 break;
1668         case O_VERREVPATH:
1669                 bprintf(bp, " verrevpath");
1670                 break;
1671         case O_VERSRCREACH:
1672                 bprintf(bp, " versrcreach");
1673                 break;
1674         case O_ANTISPOOF:
1675                 bprintf(bp, " antispoof");
1676                 break;
1677         case O_IPSEC:
1678                 bprintf(bp, " ipsec");
1679                 break;
1680         case O_NOP:
1681                 bprintf(bp, " // %s", (char *)(cmd + 1));
1682                 break;
1683         case O_KEEP_STATE:
1684                 if (state->flags & HAVE_PROBE_STATE)
1685                         bprintf(bp, " keep-state");
1686                 else
1687                         bprintf(bp, " record-state");
1688                 bprintf(bp, " :%s",
1689                     object_search_ctlv(fo->tstate, cmd->arg1,
1690                     IPFW_TLV_STATE_NAME));
1691                 break;
1692         case O_LIMIT:
1693                 if (state->flags & HAVE_PROBE_STATE)
1694                         bprintf(bp, " limit");
1695                 else
1696                         bprintf(bp, " set-limit");
1697                 print_limit_mask(bp, insntod(cmd, limit));
1698                 bprintf(bp, " :%s",
1699                     object_search_ctlv(fo->tstate, cmd->arg1,
1700                     IPFW_TLV_STATE_NAME));
1701                 break;
1702         case O_IP6:
1703                 bprintf(bp, " ip6");
1704                 break;
1705         case O_IP4:
1706                 bprintf(bp, " ip4");
1707                 break;
1708         case O_ICMP6TYPE:
1709                 print_icmp6types(bp, insntod(cmd, u32));
1710                 break;
1711         case O_EXT_HDR:
1712                 print_ext6hdr(bp, cmd);
1713                 break;
1714         case O_TAGGED:
1715                 if (F_LEN(cmd) == 1)
1716                         bprint_uint_arg(bp, " tagged ", cmd->arg1);
1717                 else
1718                         print_newports(bp, insntod(cmd, u16),
1719                                     0, O_TAGGED);
1720                 break;
1721         case O_SKIP_ACTION:
1722                 bprintf(bp, " defer-immediate-action");
1723                 break;
1724         default:
1725                 bprintf(bp, " [opcode %d len %d]", cmd->opcode,
1726                     cmd->len);
1727         }
1728         if (cmd->len & F_OR) {
1729                 bprintf(bp, " or");
1730                 state->or_block = 1;
1731         } else if (state->or_block != 0) {
1732                 bprintf(bp, " }");
1733                 state->or_block = 0;
1734         }
1735         mark_printed(state, cmd);
1736
1737         return (1);
1738 }
1739
1740 static ipfw_insn *
1741 print_opcode(struct buf_pr *bp, struct format_opts *fo,
1742     struct show_state *state, int opcode)
1743 {
1744         ipfw_insn *cmd;
1745         int l;
1746
1747         for (l = state->rule->act_ofs, cmd = state->rule->cmd;
1748             l > 0; l -= F_LEN(cmd), cmd += F_LEN(cmd)) {
1749                 /* We use zero opcode to print the rest of options */
1750                 if (opcode >= 0 && cmd->opcode != opcode)
1751                         continue;
1752                 /*
1753                  * Skip O_NOP, when we printing the rest
1754                  * of options, it will be handled separately.
1755                  */
1756                 if (cmd->opcode == O_NOP && opcode != O_NOP)
1757                         continue;
1758                 if (!print_instruction(bp, fo, state, cmd))
1759                         continue;
1760                 return (cmd);
1761         }
1762         return (NULL);
1763 }
1764
1765 static void
1766 print_fwd(struct buf_pr *bp, const ipfw_insn *cmd)
1767 {
1768         char buf[INET6_ADDRSTRLEN + IF_NAMESIZE + 2];
1769         ipfw_insn_sa6 *sa6;
1770         ipfw_insn_sa *sa;
1771         uint16_t port;
1772
1773         if (cmd->opcode == O_FORWARD_IP) {
1774                 sa = insntod(cmd, sa);
1775                 port = sa->sa.sin_port;
1776                 if (sa->sa.sin_addr.s_addr == INADDR_ANY)
1777                         bprintf(bp, "fwd tablearg");
1778                 else
1779                         bprintf(bp, "fwd %s", inet_ntoa(sa->sa.sin_addr));
1780         } else {
1781                 sa6 = insntod(cmd, sa6);
1782                 port = sa6->sa.sin6_port;
1783                 bprintf(bp, "fwd ");
1784                 if (getnameinfo((const struct sockaddr *)&sa6->sa,
1785                     sizeof(struct sockaddr_in6), buf, sizeof(buf), NULL, 0,
1786                     NI_NUMERICHOST) == 0)
1787                         bprintf(bp, "%s", buf);
1788         }
1789         if (port != 0)
1790                 bprintf(bp, ",%u", port);
1791 }
1792
1793 static int
1794 print_action_instruction(struct buf_pr *bp, const struct format_opts *fo,
1795     struct show_state *state, const ipfw_insn *cmd)
1796 {
1797         const char *s;
1798
1799         if (is_printed_opcode(state, cmd))
1800                 return (0);
1801         switch (cmd->opcode) {
1802         case O_CHECK_STATE:
1803                 bprintf(bp, "check-state");
1804                 if (cmd->arg1 != 0)
1805                         s = object_search_ctlv(fo->tstate, cmd->arg1,
1806                             IPFW_TLV_STATE_NAME);
1807                 else
1808                         s = NULL;
1809                 bprintf(bp, " :%s", s ? s: "any");
1810                 break;
1811         case O_ACCEPT:
1812                 bprintf(bp, "allow");
1813                 break;
1814         case O_COUNT:
1815                 bprintf(bp, "count");
1816                 break;
1817         case O_DENY:
1818                 bprintf(bp, "deny");
1819                 break;
1820         case O_REJECT:
1821                 if (cmd->arg1 == ICMP_REJECT_RST)
1822                         bprintf(bp, "reset");
1823                 else if (cmd->arg1 == ICMP_REJECT_ABORT)
1824                         bprintf(bp, "abort");
1825                 else if (cmd->arg1 == ICMP_UNREACH_HOST)
1826                         bprintf(bp, "reject");
1827                 else
1828                         print_reject_code(bp, cmd->arg1);
1829                 break;
1830         case O_UNREACH6:
1831                 if (cmd->arg1 == ICMP6_UNREACH_RST)
1832                         bprintf(bp, "reset6");
1833                 else if (cmd->arg1 == ICMP6_UNREACH_ABORT)
1834                         bprintf(bp, "abort6");
1835                 else
1836                         print_unreach6_code(bp, cmd->arg1);
1837                 break;
1838         case O_SKIPTO:
1839                 bprint_uint_arg(bp, "skipto ", cmd->arg1);
1840                 break;
1841         case O_PIPE:
1842                 bprint_uint_arg(bp, "pipe ", cmd->arg1);
1843                 break;
1844         case O_QUEUE:
1845                 bprint_uint_arg(bp, "queue ", cmd->arg1);
1846                 break;
1847         case O_DIVERT:
1848                 bprint_uint_arg(bp, "divert ", cmd->arg1);
1849                 break;
1850         case O_TEE:
1851                 bprint_uint_arg(bp, "tee ", cmd->arg1);
1852                 break;
1853         case O_NETGRAPH:
1854                 bprint_uint_arg(bp, "netgraph ", cmd->arg1);
1855                 break;
1856         case O_NGTEE:
1857                 bprint_uint_arg(bp, "ngtee ", cmd->arg1);
1858                 break;
1859         case O_FORWARD_IP:
1860         case O_FORWARD_IP6:
1861                 print_fwd(bp, cmd);
1862                 break;
1863         case O_LOG:
1864                 if (insntod(cmd, log)->max_log > 0)
1865                         bprintf(bp, " log logamount %d",
1866                             insntod(cmd, log)->max_log);
1867                 else
1868                         bprintf(bp, " log");
1869                 break;
1870         case O_ALTQ:
1871 #ifndef NO_ALTQ
1872                 print_altq_cmd(bp, insntod(cmd, altq));
1873 #endif
1874                 break;
1875         case O_TAG:
1876                 bprint_uint_arg(bp, cmd->len & F_NOT ? " untag ":
1877                     " tag ", cmd->arg1);
1878                 break;
1879         case O_NAT:
1880                 if (cmd->arg1 != IP_FW_NAT44_GLOBAL)
1881                         bprint_uint_arg(bp, "nat ", cmd->arg1);
1882                 else
1883                         bprintf(bp, "nat global");
1884                 break;
1885         case O_SETFIB:
1886                 if (cmd->arg1 == IP_FW_TARG)
1887                         bprint_uint_arg(bp, "setfib ", cmd->arg1);
1888                 else
1889                         bprintf(bp, "setfib %u", cmd->arg1 & 0x7FFF);
1890                 break;
1891         case O_EXTERNAL_ACTION:
1892                 /*
1893                  * The external action can consists of two following
1894                  * each other opcodes - O_EXTERNAL_ACTION and
1895                  * O_EXTERNAL_INSTANCE. The first contains the ID of
1896                  * name of external action. The second contains the ID
1897                  * of name of external action instance.
1898                  * NOTE: in case when external action has no named
1899                  * instances support, the second opcode isn't needed.
1900                  */
1901                 state->eaction = cmd;
1902                 s = object_search_ctlv(fo->tstate, cmd->arg1,
1903                     IPFW_TLV_EACTION);
1904                 if (match_token(rule_eactions, s) != -1)
1905                         bprintf(bp, "%s", s);
1906                 else
1907                         bprintf(bp, "eaction %s", s);
1908                 break;
1909         case O_EXTERNAL_INSTANCE:
1910                 if (state->eaction == NULL)
1911                         break;
1912                 /*
1913                  * XXX: we need to teach ipfw(9) to rewrite opcodes
1914                  * in the user buffer on rule addition. When we add
1915                  * the rule, we specify zero TLV type for
1916                  * O_EXTERNAL_INSTANCE object. To show correct
1917                  * rule after `ipfw add` we need to search instance
1918                  * name with zero type. But when we do `ipfw show`
1919                  * we calculate TLV type using IPFW_TLV_EACTION_NAME()
1920                  * macro.
1921                  */
1922                 s = object_search_ctlv(fo->tstate, cmd->arg1, 0);
1923                 if (s == NULL)
1924                         s = object_search_ctlv(fo->tstate,
1925                             cmd->arg1, IPFW_TLV_EACTION_NAME(
1926                             state->eaction->arg1));
1927                 bprintf(bp, " %s", s);
1928                 break;
1929         case O_EXTERNAL_DATA:
1930                 if (state->eaction == NULL)
1931                         break;
1932                 /*
1933                  * Currently we support data formatting only for
1934                  * external data with datalen u16. For unknown data
1935                  * print its size in bytes.
1936                  */
1937                 if (cmd->len == F_INSN_SIZE(ipfw_insn))
1938                         bprintf(bp, " %u", cmd->arg1);
1939                 else
1940                         bprintf(bp, " %ubytes",
1941                             cmd->len * sizeof(uint32_t));
1942                 break;
1943         case O_SETDSCP:
1944                 if (cmd->arg1 == IP_FW_TARG) {
1945                         bprintf(bp, "setdscp tablearg");
1946                         break;
1947                 }
1948                 s = match_value(f_ipdscp, cmd->arg1 & 0x3F);
1949                 if (s != NULL)
1950                         bprintf(bp, "setdscp %s", s);
1951                 else
1952                         bprintf(bp, "setdscp %u", cmd->arg1 & 0x3F);
1953                 break;
1954         case O_REASS:
1955                 bprintf(bp, "reass");
1956                 break;
1957         case O_CALLRETURN:
1958                 if (cmd->len & F_NOT)
1959                         bprintf(bp, "return");
1960                 else
1961                         bprint_uint_arg(bp, "call ", cmd->arg1);
1962                 break;
1963         default:
1964                 bprintf(bp, "** unrecognized action %d len %d ",
1965                         cmd->opcode, cmd->len);
1966         }
1967         mark_printed(state, cmd);
1968
1969         return (1);
1970 }
1971
1972
1973 static ipfw_insn *
1974 print_action(struct buf_pr *bp, struct format_opts *fo,
1975     struct show_state *state, uint8_t opcode)
1976 {
1977         ipfw_insn *cmd;
1978         int l;
1979
1980         for (l = state->rule->cmd_len - state->rule->act_ofs,
1981             cmd = ACTION_PTR(state->rule); l > 0;
1982             l -= F_LEN(cmd), cmd += F_LEN(cmd)) {
1983                 if (cmd->opcode != opcode)
1984                         continue;
1985                 if (!print_action_instruction(bp, fo, state, cmd))
1986                         continue;
1987                 return (cmd);
1988         }
1989         return (NULL);
1990 }
1991
1992 static void
1993 print_proto(struct buf_pr *bp, struct format_opts *fo,
1994     struct show_state *state)
1995 {
1996         ipfw_insn *cmd;
1997         int l, proto, ip4, ip6;
1998
1999         /* Count all O_PROTO, O_IP4, O_IP6 instructions. */
2000         proto = ip4 = ip6 = 0;
2001         for (l = state->rule->act_ofs, cmd = state->rule->cmd;
2002             l > 0; l -= F_LEN(cmd), cmd += F_LEN(cmd)) {
2003                 switch (cmd->opcode) {
2004                 case O_PROTO:
2005                         proto++;
2006                         break;
2007                 case O_IP4:
2008                         ip4 = 1;
2009                         if (cmd->len & F_OR)
2010                                 ip4++;
2011                         break;
2012                 case O_IP6:
2013                         ip6 = 1;
2014                         if (cmd->len & F_OR)
2015                                 ip6++;
2016                         break;
2017                 default:
2018                         continue;
2019                 }
2020         }
2021         if (proto == 0 && ip4 == 0 && ip6 == 0) {
2022                 state->proto = IPPROTO_IP;
2023                 state->flags |= HAVE_PROTO;
2024                 bprintf(bp, " ip");
2025                 return;
2026         }
2027         /* To handle the case { ip4 or ip6 }, print opcode with F_OR first */
2028         cmd = NULL;
2029         if (ip4 || ip6)
2030                 cmd = print_opcode(bp, fo, state, ip4 > ip6 ? O_IP4: O_IP6);
2031         if (cmd != NULL && (cmd->len & F_OR))
2032                 cmd = print_opcode(bp, fo, state, ip4 > ip6 ? O_IP6: O_IP4);
2033         if (cmd == NULL || (cmd->len & F_OR))
2034                 for (l = proto; l > 0; l--) {
2035                         cmd = print_opcode(bp, fo, state, O_PROTO);
2036                         if (cmd == NULL || (cmd->len & F_OR) == 0)
2037                                 break;
2038                 }
2039         /* Initialize proto, it is used by print_newports() */
2040         state->flags |= HAVE_PROTO;
2041         if (state->proto == 0 && ip6 != 0)
2042                 state->proto = IPPROTO_IPV6;
2043 }
2044
2045 static int
2046 match_opcode(int opcode, const int opcodes[], size_t nops)
2047 {
2048         int i;
2049
2050         for (i = 0; i < nops; i++)
2051                 if (opcode == opcodes[i])
2052                         return (1);
2053         return (0);
2054 }
2055
2056 static void
2057 print_address(struct buf_pr *bp, struct format_opts *fo,
2058     struct show_state *state, const int opcodes[], size_t nops, int portop,
2059     int flag)
2060 {
2061         ipfw_insn *cmd;
2062         int count, l, portcnt, pf;
2063
2064         count = portcnt = 0;
2065         for (l = state->rule->act_ofs, cmd = state->rule->cmd;
2066             l > 0; l -= F_LEN(cmd), cmd += F_LEN(cmd)) {
2067                 if (match_opcode(cmd->opcode, opcodes, nops))
2068                         count++;
2069                 else if (cmd->opcode == portop)
2070                         portcnt++;
2071         }
2072         if (count == 0)
2073                 bprintf(bp, " any");
2074         for (l = state->rule->act_ofs, cmd = state->rule->cmd;
2075             l > 0 && count > 0; l -= F_LEN(cmd), cmd += F_LEN(cmd)) {
2076                 if (!match_opcode(cmd->opcode, opcodes, nops))
2077                         continue;
2078                 print_instruction(bp, fo, state, cmd);
2079                 if ((cmd->len & F_OR) == 0)
2080                         break;
2081                 count--;
2082         }
2083         /*
2084          * If several O_IP_?PORT opcodes specified, leave them to the
2085          * options section.
2086          */
2087         if (portcnt == 1) {
2088                 for (l = state->rule->act_ofs, cmd = state->rule->cmd, pf = 0;
2089                     l > 0; l -= F_LEN(cmd), cmd += F_LEN(cmd)) {
2090                         if (cmd->opcode != portop) {
2091                                 pf = (cmd->len & F_OR);
2092                                 continue;
2093                         }
2094                         /* Print opcode iff it is not in OR block. */
2095                         if (pf == 0 && (cmd->len & F_OR) == 0)
2096                                 print_instruction(bp, fo, state, cmd);
2097                         break;
2098                 }
2099         }
2100         state->flags |= flag;
2101 }
2102
2103 static const int action_opcodes[] = {
2104         O_CHECK_STATE, O_ACCEPT, O_COUNT, O_DENY, O_REJECT,
2105         O_UNREACH6, O_SKIPTO, O_PIPE, O_QUEUE, O_DIVERT, O_TEE,
2106         O_NETGRAPH, O_NGTEE, O_FORWARD_IP, O_FORWARD_IP6, O_NAT,
2107         O_SETFIB, O_SETDSCP, O_REASS, O_CALLRETURN,
2108         /* keep the following opcodes at the end of the list */
2109         O_EXTERNAL_ACTION, O_EXTERNAL_INSTANCE, O_EXTERNAL_DATA
2110 };
2111
2112 static const int modifier_opcodes[] = {
2113         O_LOG, O_ALTQ, O_TAG
2114 };
2115
2116 static const int src_opcodes[] = {
2117         O_IP_SRC, O_IP_SRC_LOOKUP, O_IP_SRC_MASK, O_IP_SRC_ME,
2118         O_IP_SRC_SET, O_IP6_SRC, O_IP6_SRC_MASK, O_IP6_SRC_ME
2119 };
2120
2121 static const int dst_opcodes[] = {
2122         O_IP_DST, O_IP_DST_LOOKUP, O_IP_DST_MASK, O_IP_DST_ME,
2123         O_IP_DST_SET, O_IP6_DST, O_IP6_DST_MASK, O_IP6_DST_ME
2124 };
2125
2126 static void
2127 show_static_rule(struct cmdline_opts *co, struct format_opts *fo,
2128     struct buf_pr *bp, struct ip_fw_rule *rule, struct ip_fw_bcounter *cntr)
2129 {
2130         struct show_state state;
2131         ipfw_insn *cmd;
2132         static int twidth = 0;
2133         int i;
2134
2135         /* Print # DISABLED or skip the rule */
2136         if ((fo->set_mask & (1 << rule->set)) == 0) {
2137                 /* disabled mask */
2138                 if (!co->show_sets)
2139                         return;
2140                 else
2141                         bprintf(bp, "# DISABLED ");
2142         }
2143         if (init_show_state(&state, rule) != 0) {
2144                 warn("init_show_state() failed");
2145                 return;
2146         }
2147         bprintf(bp, "%05u ", rule->rulenum);
2148
2149         /* Print counters if enabled */
2150         if (fo->pcwidth > 0 || fo->bcwidth > 0) {
2151                 pr_u64(bp, &cntr->pcnt, fo->pcwidth);
2152                 pr_u64(bp, &cntr->bcnt, fo->bcwidth);
2153         }
2154
2155         /* Print timestamp */
2156         if (co->do_time == TIMESTAMP_NUMERIC)
2157                 bprintf(bp, "%10u ", cntr->timestamp);
2158         else if (co->do_time == TIMESTAMP_STRING) {
2159                 char timestr[30];
2160                 time_t t = (time_t)0;
2161
2162                 if (twidth == 0) {
2163                         strcpy(timestr, ctime(&t));
2164                         *strchr(timestr, '\n') = '\0';
2165                         twidth = strlen(timestr);
2166                 }
2167                 if (cntr->timestamp > 0) {
2168                         t = _long_to_time(cntr->timestamp);
2169
2170                         strcpy(timestr, ctime(&t));
2171                         *strchr(timestr, '\n') = '\0';
2172                         bprintf(bp, "%s ", timestr);
2173                 } else {
2174                         bprintf(bp, "%*s", twidth, " ");
2175                 }
2176         }
2177
2178         /* Print set number */
2179         if (co->show_sets)
2180                 bprintf(bp, "set %d ", rule->set);
2181
2182         /* Print the optional "match probability" */
2183         cmd = print_opcode(bp, fo, &state, O_PROB);
2184         /* Print rule action */
2185         for (i = 0; i < nitems(action_opcodes); i++) {
2186                 cmd = print_action(bp, fo, &state, action_opcodes[i]);
2187                 if (cmd == NULL)
2188                         continue;
2189                 /* Handle special cases */
2190                 switch (cmd->opcode) {
2191                 case O_CHECK_STATE:
2192                         goto end;
2193                 case O_EXTERNAL_ACTION:
2194                 case O_EXTERNAL_INSTANCE:
2195                         /* External action can have several instructions */
2196                         continue;
2197                 }
2198                 break;
2199         }
2200         /* Print rule modifiers */
2201         for (i = 0; i < nitems(modifier_opcodes); i++)
2202                 print_action(bp, fo, &state, modifier_opcodes[i]);
2203         /*
2204          * Print rule body
2205          */
2206         if (co->comment_only != 0)
2207                 goto end;
2208
2209         if (rule->flags & IPFW_RULE_JUSTOPTS) {
2210                 state.flags |= HAVE_PROTO | HAVE_SRCIP | HAVE_DSTIP;
2211                 goto justopts;
2212         }
2213
2214         print_proto(bp, fo, &state);
2215
2216         /* Print source */
2217         bprintf(bp, " from");
2218         print_address(bp, fo, &state, src_opcodes, nitems(src_opcodes),
2219             O_IP_SRCPORT, HAVE_SRCIP);
2220
2221         /* Print destination */
2222         bprintf(bp, " to");
2223         print_address(bp, fo, &state, dst_opcodes, nitems(dst_opcodes),
2224             O_IP_DSTPORT, HAVE_DSTIP);
2225
2226 justopts:
2227         /* Print the rest of options */
2228         while (print_opcode(bp, fo, &state, -1))
2229                 ;
2230 end:
2231         /* Print comment at the end */
2232         cmd = print_opcode(bp, fo, &state, O_NOP);
2233         if (co->comment_only != 0 && cmd == NULL)
2234                 bprintf(bp, " // ...");
2235         bprintf(bp, "\n");
2236         free_show_state(&state);
2237 }
2238
2239 static void
2240 show_dyn_state(struct cmdline_opts *co, struct format_opts *fo,
2241     struct buf_pr *bp, ipfw_dyn_rule *d)
2242 {
2243         struct protoent *pe;
2244         struct in_addr a;
2245         uint16_t rulenum;
2246         char buf[INET6_ADDRSTRLEN];
2247
2248         if (!co->do_expired) {
2249                 if (!d->expire && !(d->dyn_type == O_LIMIT_PARENT))
2250                         return;
2251         }
2252         bcopy(&d->rule, &rulenum, sizeof(rulenum));
2253         bprintf(bp, "%05d", rulenum);
2254         if (fo->pcwidth > 0 || fo->bcwidth > 0) {
2255                 bprintf(bp, " ");
2256                 pr_u64(bp, &d->pcnt, fo->pcwidth);
2257                 pr_u64(bp, &d->bcnt, fo->bcwidth);
2258                 bprintf(bp, "(%ds)", d->expire);
2259         }
2260         switch (d->dyn_type) {
2261         case O_LIMIT_PARENT:
2262                 bprintf(bp, " PARENT %d", d->count);
2263                 break;
2264         case O_LIMIT:
2265                 bprintf(bp, " LIMIT");
2266                 break;
2267         case O_KEEP_STATE: /* bidir, no mask */
2268                 bprintf(bp, " STATE");
2269                 break;
2270         }
2271
2272         if ((pe = getprotobynumber(d->id.proto)) != NULL)
2273                 bprintf(bp, " %s", pe->p_name);
2274         else
2275                 bprintf(bp, " proto %u", d->id.proto);
2276
2277         if (d->id.addr_type == 4) {
2278                 a.s_addr = htonl(d->id.src_ip);
2279                 bprintf(bp, " %s %d", inet_ntoa(a), d->id.src_port);
2280
2281                 a.s_addr = htonl(d->id.dst_ip);
2282                 bprintf(bp, " <-> %s %d", inet_ntoa(a), d->id.dst_port);
2283         } else if (d->id.addr_type == 6) {
2284                 bprintf(bp, " %s %d", inet_ntop(AF_INET6, &d->id.src_ip6, buf,
2285                     sizeof(buf)), d->id.src_port);
2286                 bprintf(bp, " <-> %s %d", inet_ntop(AF_INET6, &d->id.dst_ip6,
2287                     buf, sizeof(buf)), d->id.dst_port);
2288         } else
2289                 bprintf(bp, " UNKNOWN <-> UNKNOWN");
2290         if (d->kidx != 0)
2291                 bprintf(bp, " :%s", object_search_ctlv(fo->tstate,
2292                     d->kidx, IPFW_TLV_STATE_NAME));
2293 }
2294
2295 static int
2296 do_range_cmd(int cmd, ipfw_range_tlv *rt)
2297 {
2298         ipfw_range_header rh;
2299         size_t sz;
2300
2301         memset(&rh, 0, sizeof(rh));
2302         memcpy(&rh.range, rt, sizeof(*rt));
2303         rh.range.head.length = sizeof(*rt);
2304         rh.range.head.type = IPFW_TLV_RANGE;
2305         sz = sizeof(rh);
2306
2307         if (do_get3(cmd, &rh.opheader, &sz) != 0)
2308                 return (-1);
2309         /* Save number of matched objects */
2310         rt->new_set = rh.range.new_set;
2311         return (0);
2312 }
2313
2314 /*
2315  * This one handles all set-related commands
2316  *      ipfw set { show | enable | disable }
2317  *      ipfw set swap X Y
2318  *      ipfw set move X to Y
2319  *      ipfw set move rule X to Y
2320  */
2321 void
2322 ipfw_sets_handler(char *av[])
2323 {
2324         ipfw_range_tlv rt;
2325         char *msg;
2326         size_t size;
2327         uint32_t masks[2];
2328         int i;
2329         uint16_t rulenum;
2330         uint8_t cmd;
2331
2332         av++;
2333         memset(&rt, 0, sizeof(rt));
2334
2335         if (av[0] == NULL)
2336                 errx(EX_USAGE, "set needs command");
2337         if (_substrcmp(*av, "show") == 0) {
2338                 struct format_opts fo;
2339                 ipfw_cfg_lheader *cfg;
2340
2341                 memset(&fo, 0, sizeof(fo));
2342                 if (ipfw_get_config(&co, &fo, &cfg, &size) != 0)
2343                         err(EX_OSERR, "requesting config failed");
2344
2345                 for (i = 0, msg = "disable"; i < RESVD_SET; i++)
2346                         if ((cfg->set_mask & (1<<i)) == 0) {
2347                                 printf("%s %d", msg, i);
2348                                 msg = "";
2349                         }
2350                 msg = (cfg->set_mask != (uint32_t)-1) ? " enable" : "enable";
2351                 for (i = 0; i < RESVD_SET; i++)
2352                         if ((cfg->set_mask & (1<<i)) != 0) {
2353                                 printf("%s %d", msg, i);
2354                                 msg = "";
2355                         }
2356                 printf("\n");
2357                 free(cfg);
2358         } else if (_substrcmp(*av, "swap") == 0) {
2359                 av++;
2360                 if ( av[0] == NULL || av[1] == NULL )
2361                         errx(EX_USAGE, "set swap needs 2 set numbers\n");
2362                 rt.set = atoi(av[0]);
2363                 rt.new_set = atoi(av[1]);
2364                 if (!isdigit(*(av[0])) || rt.set > RESVD_SET)
2365                         errx(EX_DATAERR, "invalid set number %s\n", av[0]);
2366                 if (!isdigit(*(av[1])) || rt.new_set > RESVD_SET)
2367                         errx(EX_DATAERR, "invalid set number %s\n", av[1]);
2368                 i = do_range_cmd(IP_FW_SET_SWAP, &rt);
2369         } else if (_substrcmp(*av, "move") == 0) {
2370                 av++;
2371                 if (av[0] && _substrcmp(*av, "rule") == 0) {
2372                         rt.flags = IPFW_RCFLAG_RANGE; /* move rules to new set */
2373                         cmd = IP_FW_XMOVE;
2374                         av++;
2375                 } else
2376                         cmd = IP_FW_SET_MOVE; /* Move set to new one */
2377                 if (av[0] == NULL || av[1] == NULL || av[2] == NULL ||
2378                                 av[3] != NULL ||  _substrcmp(av[1], "to") != 0)
2379                         errx(EX_USAGE, "syntax: set move [rule] X to Y\n");
2380                 rulenum = atoi(av[0]);
2381                 rt.new_set = atoi(av[2]);
2382                 if (cmd == IP_FW_XMOVE) {
2383                         rt.start_rule = rulenum;
2384                         rt.end_rule = rulenum;
2385                 } else
2386                         rt.set = rulenum;
2387                 rt.new_set = atoi(av[2]);
2388                 if (!isdigit(*(av[0])) || (cmd == 3 && rt.set > RESVD_SET) ||
2389                         (cmd == 2 && rt.start_rule == IPFW_DEFAULT_RULE) )
2390                         errx(EX_DATAERR, "invalid source number %s\n", av[0]);
2391                 if (!isdigit(*(av[2])) || rt.new_set > RESVD_SET)
2392                         errx(EX_DATAERR, "invalid dest. set %s\n", av[1]);
2393                 i = do_range_cmd(cmd, &rt);
2394                 if (i < 0)
2395                         err(EX_OSERR, "failed to move %s",
2396                             cmd == IP_FW_SET_MOVE ? "set": "rule");
2397         } else if (_substrcmp(*av, "disable") == 0 ||
2398                    _substrcmp(*av, "enable") == 0 ) {
2399                 int which = _substrcmp(*av, "enable") == 0 ? 1 : 0;
2400
2401                 av++;
2402                 masks[0] = masks[1] = 0;
2403
2404                 while (av[0]) {
2405                         if (isdigit(**av)) {
2406                                 i = atoi(*av);
2407                                 if (i < 0 || i > RESVD_SET)
2408                                         errx(EX_DATAERR,
2409                                             "invalid set number %d\n", i);
2410                                 masks[which] |= (1<<i);
2411                         } else if (_substrcmp(*av, "disable") == 0)
2412                                 which = 0;
2413                         else if (_substrcmp(*av, "enable") == 0)
2414                                 which = 1;
2415                         else
2416                                 errx(EX_DATAERR,
2417                                         "invalid set command %s\n", *av);
2418                         av++;
2419                 }
2420                 if ( (masks[0] & masks[1]) != 0 )
2421                         errx(EX_DATAERR,
2422                             "cannot enable and disable the same set\n");
2423
2424                 rt.set = masks[0];
2425                 rt.new_set = masks[1];
2426                 i = do_range_cmd(IP_FW_SET_ENABLE, &rt);
2427                 if (i)
2428                         warn("set enable/disable: setsockopt(IP_FW_SET_ENABLE)");
2429         } else
2430                 errx(EX_USAGE, "invalid set command %s\n", *av);
2431 }
2432
2433 void
2434 ipfw_sysctl_handler(char *av[], int which)
2435 {
2436         av++;
2437
2438         if (av[0] == NULL) {
2439                 warnx("missing keyword to enable/disable\n");
2440         } else if (_substrcmp(*av, "firewall") == 0) {
2441                 sysctlbyname("net.inet.ip.fw.enable", NULL, 0,
2442                     &which, sizeof(which));
2443                 sysctlbyname("net.inet6.ip6.fw.enable", NULL, 0,
2444                     &which, sizeof(which));
2445         } else if (_substrcmp(*av, "one_pass") == 0) {
2446                 sysctlbyname("net.inet.ip.fw.one_pass", NULL, 0,
2447                     &which, sizeof(which));
2448         } else if (_substrcmp(*av, "debug") == 0) {
2449                 sysctlbyname("net.inet.ip.fw.debug", NULL, 0,
2450                     &which, sizeof(which));
2451         } else if (_substrcmp(*av, "verbose") == 0) {
2452                 sysctlbyname("net.inet.ip.fw.verbose", NULL, 0,
2453                     &which, sizeof(which));
2454         } else if (_substrcmp(*av, "dyn_keepalive") == 0) {
2455                 sysctlbyname("net.inet.ip.fw.dyn_keepalive", NULL, 0,
2456                     &which, sizeof(which));
2457 #ifndef NO_ALTQ
2458         } else if (_substrcmp(*av, "altq") == 0) {
2459                 altq_set_enabled(which);
2460 #endif
2461         } else {
2462                 warnx("unrecognize enable/disable keyword: %s\n", *av);
2463         }
2464 }
2465
2466 typedef void state_cb(struct cmdline_opts *co, struct format_opts *fo,
2467     void *arg, void *state);
2468
2469 static void
2470 prepare_format_dyn(struct cmdline_opts *co, struct format_opts *fo,
2471     void *arg, void *_state)
2472 {
2473         ipfw_dyn_rule *d;
2474         int width;
2475         uint8_t set;
2476
2477         d = (ipfw_dyn_rule *)_state;
2478         /* Count _ALL_ states */
2479         fo->dcnt++;
2480
2481         if (fo->show_counters == 0)
2482                 return;
2483
2484         if (co->use_set) {
2485                 /* skip states from another set */
2486                 bcopy((char *)&d->rule + sizeof(uint16_t), &set,
2487                     sizeof(uint8_t));
2488                 if (set != co->use_set - 1)
2489                         return;
2490         }
2491
2492         width = pr_u64(NULL, &d->pcnt, 0);
2493         if (width > fo->pcwidth)
2494                 fo->pcwidth = width;
2495
2496         width = pr_u64(NULL, &d->bcnt, 0);
2497         if (width > fo->bcwidth)
2498                 fo->bcwidth = width;
2499 }
2500
2501 static int
2502 foreach_state(struct cmdline_opts *co, struct format_opts *fo,
2503     caddr_t base, size_t sz, state_cb dyn_bc, void *dyn_arg)
2504 {
2505         int ttype;
2506         state_cb *fptr;
2507         void *farg;
2508         ipfw_obj_tlv *tlv;
2509         ipfw_obj_ctlv *ctlv;
2510
2511         fptr = NULL;
2512         ttype = 0;
2513
2514         while (sz > 0) {
2515                 ctlv = (ipfw_obj_ctlv *)base;
2516                 switch (ctlv->head.type) {
2517                 case IPFW_TLV_DYNSTATE_LIST:
2518                         base += sizeof(*ctlv);
2519                         sz -= sizeof(*ctlv);
2520                         ttype = IPFW_TLV_DYN_ENT;
2521                         fptr = dyn_bc;
2522                         farg = dyn_arg;
2523                         break;
2524                 default:
2525                         return (sz);
2526                 }
2527
2528                 while (sz > 0) {
2529                         tlv = (ipfw_obj_tlv *)base;
2530                         if (tlv->type != ttype)
2531                                 break;
2532
2533                         fptr(co, fo, farg, tlv + 1);
2534                         sz -= tlv->length;
2535                         base += tlv->length;
2536                 }
2537         }
2538
2539         return (sz);
2540 }
2541
2542 static void
2543 prepare_format_opts(struct cmdline_opts *co, struct format_opts *fo,
2544     ipfw_obj_tlv *rtlv, int rcnt, caddr_t dynbase, size_t dynsz)
2545 {
2546         int bcwidth, pcwidth, width;
2547         int n;
2548         struct ip_fw_bcounter *cntr;
2549         struct ip_fw_rule *r;
2550
2551         bcwidth = 0;
2552         pcwidth = 0;
2553         if (fo->show_counters != 0) {
2554                 for (n = 0; n < rcnt; n++,
2555                     rtlv = (ipfw_obj_tlv *)((caddr_t)rtlv + rtlv->length)) {
2556                         cntr = (struct ip_fw_bcounter *)(rtlv + 1);
2557                         r = (struct ip_fw_rule *)((caddr_t)cntr + cntr->size);
2558                         /* skip rules from another set */
2559                         if (co->use_set && r->set != co->use_set - 1)
2560                                 continue;
2561
2562                         /* packet counter */
2563                         width = pr_u64(NULL, &cntr->pcnt, 0);
2564                         if (width > pcwidth)
2565                                 pcwidth = width;
2566
2567                         /* byte counter */
2568                         width = pr_u64(NULL, &cntr->bcnt, 0);
2569                         if (width > bcwidth)
2570                                 bcwidth = width;
2571                 }
2572         }
2573         fo->bcwidth = bcwidth;
2574         fo->pcwidth = pcwidth;
2575
2576         fo->dcnt = 0;
2577         if (co->do_dynamic && dynsz > 0)
2578                 foreach_state(co, fo, dynbase, dynsz, prepare_format_dyn, NULL);
2579 }
2580
2581 static int
2582 list_static_range(struct cmdline_opts *co, struct format_opts *fo,
2583     struct buf_pr *bp, ipfw_obj_tlv *rtlv, int rcnt)
2584 {
2585         int n, seen;
2586         struct ip_fw_rule *r;
2587         struct ip_fw_bcounter *cntr;
2588         int c = 0;
2589
2590         for (n = seen = 0; n < rcnt; n++,
2591             rtlv = (ipfw_obj_tlv *)((caddr_t)rtlv + rtlv->length)) {
2592
2593                 if ((fo->show_counters | fo->show_time) != 0) {
2594                         cntr = (struct ip_fw_bcounter *)(rtlv + 1);
2595                         r = (struct ip_fw_rule *)((caddr_t)cntr + cntr->size);
2596                 } else {
2597                         cntr = NULL;
2598                         r = (struct ip_fw_rule *)(rtlv + 1);
2599                 }
2600                 if (r->rulenum > fo->last)
2601                         break;
2602                 if (co->use_set && r->set != co->use_set - 1)
2603                         continue;
2604                 if (r->rulenum >= fo->first && r->rulenum <= fo->last) {
2605                         show_static_rule(co, fo, bp, r, cntr);
2606                         printf("%s", bp->buf);
2607                         c += rtlv->length;
2608                         bp_flush(bp);
2609                         seen++;
2610                 }
2611         }
2612
2613         return (seen);
2614 }
2615
2616 static void
2617 list_dyn_state(struct cmdline_opts *co, struct format_opts *fo,
2618     void *_arg, void *_state)
2619 {
2620         uint16_t rulenum;
2621         uint8_t set;
2622         ipfw_dyn_rule *d;
2623         struct buf_pr *bp;
2624
2625         d = (ipfw_dyn_rule *)_state;
2626         bp = (struct buf_pr *)_arg;
2627
2628         bcopy(&d->rule, &rulenum, sizeof(rulenum));
2629         if (rulenum > fo->last)
2630                 return;
2631         if (co->use_set) {
2632                 bcopy((char *)&d->rule + sizeof(uint16_t),
2633                       &set, sizeof(uint8_t));
2634                 if (set != co->use_set - 1)
2635                         return;
2636         }
2637         if (rulenum >= fo->first) {
2638                 show_dyn_state(co, fo, bp, d);
2639                 printf("%s\n", bp->buf);
2640                 bp_flush(bp);
2641         }
2642 }
2643
2644 static int
2645 list_dyn_range(struct cmdline_opts *co, struct format_opts *fo,
2646     struct buf_pr *bp, caddr_t base, size_t sz)
2647 {
2648
2649         sz = foreach_state(co, fo, base, sz, list_dyn_state, bp);
2650         return (sz);
2651 }
2652
2653 void
2654 ipfw_list(int ac, char *av[], int show_counters)
2655 {
2656         ipfw_cfg_lheader *cfg;
2657         struct format_opts sfo;
2658         size_t sz;
2659         int error;
2660         int lac;
2661         char **lav;
2662         uint32_t rnum;
2663         char *endptr;
2664
2665         if (co.test_only) {
2666                 fprintf(stderr, "Testing only, list disabled\n");
2667                 return;
2668         }
2669         if (co.do_pipe) {
2670                 dummynet_list(ac, av, show_counters);
2671                 return;
2672         }
2673
2674         ac--;
2675         av++;
2676         memset(&sfo, 0, sizeof(sfo));
2677
2678         /* Determine rule range to request */
2679         if (ac > 0) {
2680                 for (lac = ac, lav = av; lac != 0; lac--) {
2681                         rnum = strtoul(*lav++, &endptr, 10);
2682                         if (sfo.first == 0 || rnum < sfo.first)
2683                                 sfo.first = rnum;
2684
2685                         if (*endptr == '-')
2686                                 rnum = strtoul(endptr + 1, &endptr, 10);
2687                         if (sfo.last == 0 || rnum > sfo.last)
2688                                 sfo.last = rnum;
2689                 }
2690         }
2691
2692         /* get configuraion from kernel */
2693         cfg = NULL;
2694         sfo.show_counters = show_counters;
2695         sfo.show_time = co.do_time;
2696         sfo.flags = IPFW_CFG_GET_STATIC;
2697         if (co.do_dynamic != 0)
2698                 sfo.flags |= IPFW_CFG_GET_STATES;
2699         if ((sfo.show_counters | sfo.show_time) != 0)
2700                 sfo.flags |= IPFW_CFG_GET_COUNTERS;
2701         if (ipfw_get_config(&co, &sfo, &cfg, &sz) != 0)
2702                 err(EX_OSERR, "retrieving config failed");
2703
2704         error = ipfw_show_config(&co, &sfo, cfg, sz, ac, av);
2705
2706         free(cfg);
2707
2708         if (error != EX_OK)
2709                 exit(error);
2710 }
2711
2712 static int
2713 ipfw_show_config(struct cmdline_opts *co, struct format_opts *fo,
2714     ipfw_cfg_lheader *cfg, size_t sz, int ac, char *av[])
2715 {
2716         caddr_t dynbase;
2717         size_t dynsz;
2718         int rcnt;
2719         int exitval = EX_OK;
2720         int lac;
2721         char **lav;
2722         char *endptr;
2723         size_t readsz;
2724         struct buf_pr bp;
2725         ipfw_obj_ctlv *ctlv, *tstate;
2726         ipfw_obj_tlv *rbase;
2727
2728         /*
2729          * Handle tablenames TLV first, if any
2730          */
2731         tstate = NULL;
2732         rbase = NULL;
2733         dynbase = NULL;
2734         dynsz = 0;
2735         readsz = sizeof(*cfg);
2736         rcnt = 0;
2737
2738         fo->set_mask = cfg->set_mask;
2739
2740         ctlv = (ipfw_obj_ctlv *)(cfg + 1);
2741
2742         if (cfg->flags & IPFW_CFG_GET_STATIC) {
2743                 /* We've requested static rules */
2744                 if (ctlv->head.type == IPFW_TLV_TBLNAME_LIST) {
2745                         object_sort_ctlv(ctlv);
2746                         fo->tstate = ctlv;
2747                         readsz += ctlv->head.length;
2748                         ctlv = (ipfw_obj_ctlv *)((caddr_t)ctlv +
2749                             ctlv->head.length);
2750                 }
2751
2752                 if (ctlv->head.type == IPFW_TLV_RULE_LIST) {
2753                         rbase = (ipfw_obj_tlv *)(ctlv + 1);
2754                         rcnt = ctlv->count;
2755                         readsz += ctlv->head.length;
2756                         ctlv = (ipfw_obj_ctlv *)((caddr_t)ctlv +
2757                             ctlv->head.length);
2758                 }
2759         }
2760
2761         if ((cfg->flags & IPFW_CFG_GET_STATES) && (readsz != sz))  {
2762                 /* We may have some dynamic states */
2763                 dynsz = sz - readsz;
2764                 /* Skip empty header */
2765                 if (dynsz != sizeof(ipfw_obj_ctlv))
2766                         dynbase = (caddr_t)ctlv;
2767                 else
2768                         dynsz = 0;
2769         }
2770
2771         prepare_format_opts(co, fo, rbase, rcnt, dynbase, dynsz);
2772         bp_alloc(&bp, 4096);
2773
2774         /* if no rule numbers were specified, list all rules */
2775         if (ac == 0) {
2776                 fo->first = 0;
2777                 fo->last = IPFW_DEFAULT_RULE;
2778                 list_static_range(co, fo, &bp, rbase, rcnt);
2779
2780                 if (co->do_dynamic && dynsz > 0) {
2781                         printf("## Dynamic rules (%d %zu):\n", fo->dcnt, dynsz);
2782                         list_dyn_range(co, fo, &bp, dynbase, dynsz);
2783                 }
2784
2785                 bp_free(&bp);
2786                 return (EX_OK);
2787         }
2788
2789         /* display specific rules requested on command line */
2790         for (lac = ac, lav = av; lac != 0; lac--) {
2791                 /* convert command line rule # */
2792                 fo->last = fo->first = strtoul(*lav++, &endptr, 10);
2793                 if (*endptr == '-')
2794                         fo->last = strtoul(endptr + 1, &endptr, 10);
2795                 if (*endptr) {
2796                         exitval = EX_USAGE;
2797                         warnx("invalid rule number: %s", *(lav - 1));
2798                         continue;
2799                 }
2800
2801                 if (list_static_range(co, fo, &bp, rbase, rcnt) == 0) {
2802                         /* give precedence to other error(s) */
2803                         if (exitval == EX_OK)
2804                                 exitval = EX_UNAVAILABLE;
2805                         if (fo->first == fo->last)
2806                                 warnx("rule %u does not exist", fo->first);
2807                         else
2808                                 warnx("no rules in range %u-%u",
2809                                     fo->first, fo->last);
2810                 }
2811         }
2812
2813         if (co->do_dynamic && dynsz > 0) {
2814                 printf("## Dynamic rules:\n");
2815                 for (lac = ac, lav = av; lac != 0; lac--) {
2816                         fo->last = fo->first = strtoul(*lav++, &endptr, 10);
2817                         if (*endptr == '-')
2818                                 fo->last = strtoul(endptr+1, &endptr, 10);
2819                         if (*endptr)
2820                                 /* already warned */
2821                                 continue;
2822                         list_dyn_range(co, fo, &bp, dynbase, dynsz);
2823                 }
2824         }
2825
2826         bp_free(&bp);
2827         return (exitval);
2828 }
2829
2830
2831 /*
2832  * Retrieves current ipfw configuration of given type
2833  * and stores its pointer to @pcfg.
2834  *
2835  * Caller is responsible for freeing @pcfg.
2836  *
2837  * Returns 0 on success.
2838  */
2839
2840 static int
2841 ipfw_get_config(struct cmdline_opts *co, struct format_opts *fo,
2842     ipfw_cfg_lheader **pcfg, size_t *psize)
2843 {
2844         ipfw_cfg_lheader *cfg;
2845         size_t sz;
2846         int i;
2847
2848
2849         if (co->test_only != 0) {
2850                 fprintf(stderr, "Testing only, list disabled\n");
2851                 return (0);
2852         }
2853
2854         /* Start with some data size */
2855         sz = 4096;
2856         cfg = NULL;
2857
2858         for (i = 0; i < 16; i++) {
2859                 if (cfg != NULL)
2860                         free(cfg);
2861                 if ((cfg = calloc(1, sz)) == NULL)
2862                         return (ENOMEM);
2863
2864                 cfg->flags = fo->flags;
2865                 cfg->start_rule = fo->first;
2866                 cfg->end_rule = fo->last;
2867
2868                 if (do_get3(IP_FW_XGET, &cfg->opheader, &sz) != 0) {
2869                         if (errno != ENOMEM) {
2870                                 free(cfg);
2871                                 return (errno);
2872                         }
2873
2874                         /* Buffer size is not enough. Try to increase */
2875                         sz = sz * 2;
2876                         if (sz < cfg->size)
2877                                 sz = cfg->size;
2878                         continue;
2879                 }
2880
2881                 *pcfg = cfg;
2882                 *psize = sz;
2883                 return (0);
2884         }
2885
2886         free(cfg);
2887         return (ENOMEM);
2888 }
2889
2890 static int
2891 lookup_host (char *host, struct in_addr *ipaddr)
2892 {
2893         struct hostent *he;
2894
2895         if (!inet_aton(host, ipaddr)) {
2896                 if ((he = gethostbyname(host)) == NULL)
2897                         return(-1);
2898                 *ipaddr = *(struct in_addr *)he->h_addr_list[0];
2899         }
2900         return(0);
2901 }
2902
2903 struct tidx {
2904         ipfw_obj_ntlv *idx;
2905         uint32_t count;
2906         uint32_t size;
2907         uint16_t counter;
2908         uint8_t set;
2909 };
2910
2911 int
2912 ipfw_check_object_name(const char *name)
2913 {
2914         int c, i, l;
2915
2916         /*
2917          * Check that name is null-terminated and contains
2918          * valid symbols only. Valid mask is:
2919          * [a-zA-Z0-9\-_\.]{1,63}
2920          */
2921         l = strlen(name);
2922         if (l == 0 || l >= 64)
2923                 return (EINVAL);
2924         for (i = 0; i < l; i++) {
2925                 c = name[i];
2926                 if (isalpha(c) || isdigit(c) || c == '_' ||
2927                     c == '-' || c == '.')
2928                         continue;
2929                 return (EINVAL);
2930         }
2931         return (0);
2932 }
2933
2934 static char *default_state_name = "default";
2935 static int
2936 state_check_name(const char *name)
2937 {
2938
2939         if (ipfw_check_object_name(name) != 0)
2940                 return (EINVAL);
2941         if (strcmp(name, "any") == 0)
2942                 return (EINVAL);
2943         return (0);
2944 }
2945
2946 static int
2947 eaction_check_name(const char *name)
2948 {
2949
2950         if (ipfw_check_object_name(name) != 0)
2951                 return (EINVAL);
2952         /* Restrict some 'special' names */
2953         if (match_token(rule_actions, name) != -1 &&
2954             match_token(rule_action_params, name) != -1)
2955                 return (EINVAL);
2956         return (0);
2957 }
2958
2959 static uint16_t
2960 pack_object(struct tidx *tstate, char *name, int otype)
2961 {
2962         int i;
2963         ipfw_obj_ntlv *ntlv;
2964
2965         for (i = 0; i < tstate->count; i++) {
2966                 if (strcmp(tstate->idx[i].name, name) != 0)
2967                         continue;
2968                 if (tstate->idx[i].set != tstate->set)
2969                         continue;
2970                 if (tstate->idx[i].head.type != otype)
2971                         continue;
2972
2973                 return (tstate->idx[i].idx);
2974         }
2975
2976         if (tstate->count + 1 > tstate->size) {
2977                 tstate->size += 4;
2978                 tstate->idx = realloc(tstate->idx, tstate->size *
2979                     sizeof(ipfw_obj_ntlv));
2980                 if (tstate->idx == NULL)
2981                         return (0);
2982         }
2983
2984         ntlv = &tstate->idx[i];
2985         memset(ntlv, 0, sizeof(ipfw_obj_ntlv));
2986         strlcpy(ntlv->name, name, sizeof(ntlv->name));
2987         ntlv->head.type = otype;
2988         ntlv->head.length = sizeof(ipfw_obj_ntlv);
2989         ntlv->set = tstate->set;
2990         ntlv->idx = ++tstate->counter;
2991         tstate->count++;
2992
2993         return (ntlv->idx);
2994 }
2995
2996 static uint16_t
2997 pack_table(struct tidx *tstate, char *name)
2998 {
2999
3000         if (table_check_name(name) != 0)
3001                 return (0);
3002
3003         return (pack_object(tstate, name, IPFW_TLV_TBL_NAME));
3004 }
3005
3006 void
3007 fill_table(struct _ipfw_insn *cmd, char *av, uint8_t opcode,
3008     struct tidx *tstate)
3009 {
3010         uint32_t *d = ((ipfw_insn_u32 *)cmd)->d;
3011         uint16_t uidx;
3012         char *p;
3013
3014         if ((p = strchr(av + 6, ')')) == NULL)
3015                 errx(EX_DATAERR, "forgotten parenthesis: '%s'", av);
3016         *p = '\0';
3017         p = strchr(av + 6, ',');
3018         if (p)
3019                 *p++ = '\0';
3020
3021         if ((uidx = pack_table(tstate, av + 6)) == 0)
3022                 errx(EX_DATAERR, "Invalid table name: %s", av + 6);
3023
3024         cmd->opcode = opcode;
3025         cmd->arg1 = uidx;
3026         if (p) {
3027                 cmd->len |= F_INSN_SIZE(ipfw_insn_u32);
3028                 d[0] = strtoul(p, NULL, 0);
3029         } else
3030                 cmd->len |= F_INSN_SIZE(ipfw_insn);
3031 }
3032
3033
3034 /*
3035  * fills the addr and mask fields in the instruction as appropriate from av.
3036  * Update length as appropriate.
3037  * The following formats are allowed:
3038  *      me      returns O_IP_*_ME
3039  *      1.2.3.4         single IP address
3040  *      1.2.3.4:5.6.7.8 address:mask
3041  *      1.2.3.4/24      address/mask
3042  *      1.2.3.4/26{1,6,5,4,23}  set of addresses in a subnet
3043  * We can have multiple comma-separated address/mask entries.
3044  */
3045 static void
3046 fill_ip(ipfw_insn_ip *cmd, char *av, int cblen, struct tidx *tstate)
3047 {
3048         int len = 0;
3049         uint32_t *d = ((ipfw_insn_u32 *)cmd)->d;
3050
3051         cmd->o.len &= ~F_LEN_MASK;      /* zero len */
3052
3053         if (_substrcmp(av, "any") == 0)
3054                 return;
3055
3056         if (_substrcmp(av, "me") == 0) {
3057                 cmd->o.len |= F_INSN_SIZE(ipfw_insn);
3058                 return;
3059         }
3060
3061         if (strncmp(av, "table(", 6) == 0) {
3062                 fill_table(&cmd->o, av, O_IP_DST_LOOKUP, tstate);
3063                 return;
3064         }
3065
3066     while (av) {
3067         /*
3068          * After the address we can have '/' or ':' indicating a mask,
3069          * ',' indicating another address follows, '{' indicating a
3070          * set of addresses of unspecified size.
3071          */
3072         char *t = NULL, *p = strpbrk(av, "/:,{");
3073         int masklen;
3074         char md, nd = '\0';
3075
3076         CHECK_LENGTH(cblen, F_INSN_SIZE(ipfw_insn) + 2 + len);
3077
3078         if (p) {
3079                 md = *p;
3080                 *p++ = '\0';
3081                 if ((t = strpbrk(p, ",{")) != NULL) {
3082                         nd = *t;
3083                         *t = '\0';
3084                 }
3085         } else
3086                 md = '\0';
3087
3088         if (lookup_host(av, (struct in_addr *)&d[0]) != 0)
3089                 errx(EX_NOHOST, "hostname ``%s'' unknown", av);
3090         switch (md) {
3091         case ':':
3092                 if (!inet_aton(p, (struct in_addr *)&d[1]))
3093                         errx(EX_DATAERR, "bad netmask ``%s''", p);
3094                 break;
3095         case '/':
3096                 masklen = atoi(p);
3097                 if (masklen == 0)
3098                         d[1] = htonl(0U);       /* mask */
3099                 else if (masklen > 32)
3100                         errx(EX_DATAERR, "bad width ``%s''", p);
3101                 else
3102                         d[1] = htonl(~0U << (32 - masklen));
3103                 break;
3104         case '{':       /* no mask, assume /24 and put back the '{' */
3105                 d[1] = htonl(~0U << (32 - 24));
3106                 *(--p) = md;
3107                 break;
3108
3109         case ',':       /* single address plus continuation */
3110                 *(--p) = md;
3111                 /* FALLTHROUGH */
3112         case 0:         /* initialization value */
3113         default:
3114                 d[1] = htonl(~0U);      /* force /32 */
3115                 break;
3116         }
3117         d[0] &= d[1];           /* mask base address with mask */
3118         if (t)
3119                 *t = nd;
3120         /* find next separator */
3121         if (p)
3122                 p = strpbrk(p, ",{");
3123         if (p && *p == '{') {
3124                 /*
3125                  * We have a set of addresses. They are stored as follows:
3126                  *   arg1       is the set size (powers of 2, 2..256)
3127                  *   addr       is the base address IN HOST FORMAT
3128                  *   mask..     is an array of arg1 bits (rounded up to
3129                  *              the next multiple of 32) with bits set
3130                  *              for each host in the map.
3131                  */
3132                 uint32_t *map = (uint32_t *)&cmd->mask;
3133                 int low, high;
3134                 int i = contigmask((uint8_t *)&(d[1]), 32);
3135
3136                 if (len > 0)
3137                         errx(EX_DATAERR, "address set cannot be in a list");
3138                 if (i < 24 || i > 31)
3139                         errx(EX_DATAERR, "invalid set with mask %d\n", i);
3140                 cmd->o.arg1 = 1<<(32-i);        /* map length           */
3141                 d[0] = ntohl(d[0]);             /* base addr in host format */
3142                 cmd->o.opcode = O_IP_DST_SET;   /* default */
3143                 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32) + (cmd->o.arg1+31)/32;
3144                 for (i = 0; i < (cmd->o.arg1+31)/32 ; i++)
3145                         map[i] = 0;     /* clear map */
3146
3147                 av = p + 1;
3148                 low = d[0] & 0xff;
3149                 high = low + cmd->o.arg1 - 1;
3150                 /*
3151                  * Here, i stores the previous value when we specify a range
3152                  * of addresses within a mask, e.g. 45-63. i = -1 means we
3153                  * have no previous value.
3154                  */
3155                 i = -1; /* previous value in a range */
3156                 while (isdigit(*av)) {
3157                         char *s;
3158                         int a = strtol(av, &s, 0);
3159
3160                         if (s == av) { /* no parameter */
3161                             if (*av != '}')
3162                                 errx(EX_DATAERR, "set not closed\n");
3163                             if (i != -1)
3164                                 errx(EX_DATAERR, "incomplete range %d-", i);
3165                             break;
3166                         }
3167                         if (a < low || a > high)
3168                             errx(EX_DATAERR, "addr %d out of range [%d-%d]\n",
3169                                 a, low, high);
3170                         a -= low;
3171                         if (i == -1)    /* no previous in range */
3172                             i = a;
3173                         else {          /* check that range is valid */
3174                             if (i > a)
3175                                 errx(EX_DATAERR, "invalid range %d-%d",
3176                                         i+low, a+low);
3177                             if (*s == '-')
3178                                 errx(EX_DATAERR, "double '-' in range");
3179                         }
3180                         for (; i <= a; i++)
3181                             map[i/32] |= 1<<(i & 31);
3182                         i = -1;
3183                         if (*s == '-')
3184                             i = a;
3185                         else if (*s == '}')
3186                             break;
3187                         av = s+1;
3188                 }
3189                 return;
3190         }
3191         av = p;
3192         if (av)                 /* then *av must be a ',' */
3193                 av++;
3194
3195         /* Check this entry */
3196         if (d[1] == 0) { /* "any", specified as x.x.x.x/0 */
3197                 /*
3198                  * 'any' turns the entire list into a NOP.
3199                  * 'not any' never matches, so it is removed from the
3200                  * list unless it is the only item, in which case we
3201                  * report an error.
3202                  */
3203                 if (cmd->o.len & F_NOT) {       /* "not any" never matches */
3204                         if (av == NULL && len == 0) /* only this entry */
3205                                 errx(EX_DATAERR, "not any never matches");
3206                 }
3207                 /* else do nothing and skip this entry */
3208                 return;
3209         }
3210         /* A single IP can be stored in an optimized format */
3211         if (d[1] == (uint32_t)~0 && av == NULL && len == 0) {
3212                 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32);
3213                 return;
3214         }
3215         len += 2;       /* two words... */
3216         d += 2;
3217     } /* end while */
3218     if (len + 1 > F_LEN_MASK)
3219         errx(EX_DATAERR, "address list too long");
3220     cmd->o.len |= len+1;
3221 }
3222
3223
3224 /* n2mask sets n bits of the mask */
3225 void
3226 n2mask(struct in6_addr *mask, int n)
3227 {
3228         static int      minimask[9] =
3229             { 0x00, 0x80, 0xc0, 0xe0, 0xf0, 0xf8, 0xfc, 0xfe, 0xff };
3230         u_char          *p;
3231
3232         memset(mask, 0, sizeof(struct in6_addr));
3233         p = (u_char *) mask;
3234         for (; n > 0; p++, n -= 8) {
3235                 if (n >= 8)
3236                         *p = 0xff;
3237                 else
3238                         *p = minimask[n];
3239         }
3240         return;
3241 }
3242
3243 static void
3244 fill_flags_cmd(ipfw_insn *cmd, enum ipfw_opcodes opcode,
3245         struct _s_x *flags, char *p)
3246 {
3247         char *e;
3248         uint32_t set = 0, clear = 0;
3249
3250         if (fill_flags(flags, p, &e, &set, &clear) != 0)
3251                 errx(EX_DATAERR, "invalid flag %s", e);
3252
3253         cmd->opcode = opcode;
3254         cmd->len =  (cmd->len & (F_NOT | F_OR)) | 1;
3255         cmd->arg1 = (set & 0xff) | ( (clear & 0xff) << 8);
3256 }
3257
3258
3259 void
3260 ipfw_delete(char *av[])
3261 {
3262         ipfw_range_tlv rt;
3263         char *sep;
3264         int i, j;
3265         int exitval = EX_OK;
3266         int do_set = 0;
3267
3268         av++;
3269         NEED1("missing rule specification");
3270         if ( *av && _substrcmp(*av, "set") == 0) {
3271                 /* Do not allow using the following syntax:
3272                  *      ipfw set N delete set M
3273                  */
3274                 if (co.use_set)
3275                         errx(EX_DATAERR, "invalid syntax");
3276                 do_set = 1;     /* delete set */
3277                 av++;
3278         }
3279
3280         /* Rule number */
3281         while (*av && isdigit(**av)) {
3282                 i = strtol(*av, &sep, 10);
3283                 j = i;
3284                 if (*sep== '-')
3285                         j = strtol(sep + 1, NULL, 10);
3286                 av++;
3287                 if (co.do_nat) {
3288                         exitval = do_cmd(IP_FW_NAT_DEL, &i, sizeof i);
3289                         if (exitval) {
3290                                 exitval = EX_UNAVAILABLE;
3291                                 if (co.do_quiet)
3292                                         continue;
3293                                 warn("nat %u not available", i);
3294                         }
3295                 } else if (co.do_pipe) {
3296                         exitval = ipfw_delete_pipe(co.do_pipe, i);
3297                 } else {
3298                         memset(&rt, 0, sizeof(rt));
3299                         if (do_set != 0) {
3300                                 rt.set = i & 31;
3301                                 rt.flags = IPFW_RCFLAG_SET;
3302                         } else {
3303                                 rt.start_rule = i & 0xffff;
3304                                 rt.end_rule = j & 0xffff;
3305                                 if (rt.start_rule == 0 && rt.end_rule == 0)
3306                                         rt.flags |= IPFW_RCFLAG_ALL;
3307                                 else
3308                                         rt.flags |= IPFW_RCFLAG_RANGE;
3309                                 if (co.use_set != 0) {
3310                                         rt.set = co.use_set - 1;
3311                                         rt.flags |= IPFW_RCFLAG_SET;
3312                                 }
3313                         }
3314                         i = do_range_cmd(IP_FW_XDEL, &rt);
3315                         if (i != 0) {
3316                                 exitval = EX_UNAVAILABLE;
3317                                 if (co.do_quiet)
3318                                         continue;
3319                                 warn("rule %u: setsockopt(IP_FW_XDEL)",
3320                                     rt.start_rule);
3321                         } else if (rt.new_set == 0 && do_set == 0) {
3322                                 exitval = EX_UNAVAILABLE;
3323                                 if (co.do_quiet)
3324                                         continue;
3325                                 if (rt.start_rule != rt.end_rule)
3326                                         warnx("no rules rules in %u-%u range",
3327                                             rt.start_rule, rt.end_rule);
3328                                 else
3329                                         warnx("rule %u not found",
3330                                             rt.start_rule);
3331                         }
3332                 }
3333         }
3334         if (exitval != EX_OK && co.do_force == 0)
3335                 exit(exitval);
3336 }
3337
3338
3339 /*
3340  * fill the interface structure. We do not check the name as we can
3341  * create interfaces dynamically, so checking them at insert time
3342  * makes relatively little sense.
3343  * Interface names containing '*', '?', or '[' are assumed to be shell
3344  * patterns which match interfaces.
3345  */
3346 static void
3347 fill_iface(ipfw_insn_if *cmd, char *arg, int cblen, struct tidx *tstate)
3348 {
3349         char *p;
3350         uint16_t uidx;
3351
3352         cmd->name[0] = '\0';
3353         cmd->o.len |= F_INSN_SIZE(ipfw_insn_if);
3354
3355         CHECK_CMDLEN;
3356
3357         /* Parse the interface or address */
3358         if (strcmp(arg, "any") == 0)
3359                 cmd->o.len = 0;         /* effectively ignore this command */
3360         else if (strncmp(arg, "table(", 6) == 0) {
3361                 if ((p = strchr(arg + 6, ')')) == NULL)
3362                         errx(EX_DATAERR, "forgotten parenthesis: '%s'", arg);
3363                 *p = '\0';
3364                 p = strchr(arg + 6, ',');
3365                 if (p)
3366                         *p++ = '\0';
3367                 if ((uidx = pack_table(tstate, arg + 6)) == 0)
3368                         errx(EX_DATAERR, "Invalid table name: %s", arg + 6);
3369
3370                 cmd->name[0] = '\1'; /* Special value indicating table */
3371                 cmd->p.kidx = uidx;
3372         } else if (!isdigit(*arg)) {
3373                 strlcpy(cmd->name, arg, sizeof(cmd->name));
3374                 cmd->p.glob = strpbrk(arg, "*?[") != NULL ? 1 : 0;
3375         } else if (!inet_aton(arg, &cmd->p.ip))
3376                 errx(EX_DATAERR, "bad ip address ``%s''", arg);
3377 }
3378
3379 static void
3380 get_mac_addr_mask(const char *p, uint8_t *addr, uint8_t *mask)
3381 {
3382         int i;
3383         size_t l;
3384         char *ap, *ptr, *optr;
3385         struct ether_addr *mac;
3386         const char *macset = "0123456789abcdefABCDEF:";
3387
3388         if (strcmp(p, "any") == 0) {
3389                 for (i = 0; i < ETHER_ADDR_LEN; i++)
3390                         addr[i] = mask[i] = 0;
3391                 return;
3392         }
3393
3394         optr = ptr = strdup(p);
3395         if ((ap = strsep(&ptr, "&/")) != NULL && *ap != 0) {
3396                 l = strlen(ap);
3397                 if (strspn(ap, macset) != l || (mac = ether_aton(ap)) == NULL)
3398                         errx(EX_DATAERR, "Incorrect MAC address");
3399                 bcopy(mac, addr, ETHER_ADDR_LEN);
3400         } else
3401                 errx(EX_DATAERR, "Incorrect MAC address");
3402
3403         if (ptr != NULL) { /* we have mask? */
3404                 if (p[ptr - optr - 1] == '/') { /* mask len */
3405                         long ml = strtol(ptr, &ap, 10);
3406                         if (*ap != 0 || ml > ETHER_ADDR_LEN * 8 || ml < 0)
3407                                 errx(EX_DATAERR, "Incorrect mask length");
3408                         for (i = 0; ml > 0 && i < ETHER_ADDR_LEN; ml -= 8, i++)
3409                                 mask[i] = (ml >= 8) ? 0xff: (~0) << (8 - ml);
3410                 } else { /* mask */
3411                         l = strlen(ptr);
3412                         if (strspn(ptr, macset) != l ||
3413                             (mac = ether_aton(ptr)) == NULL)
3414                                 errx(EX_DATAERR, "Incorrect mask");
3415                         bcopy(mac, mask, ETHER_ADDR_LEN);
3416                 }
3417         } else { /* default mask: ff:ff:ff:ff:ff:ff */
3418                 for (i = 0; i < ETHER_ADDR_LEN; i++)
3419                         mask[i] = 0xff;
3420         }
3421         for (i = 0; i < ETHER_ADDR_LEN; i++)
3422                 addr[i] &= mask[i];
3423
3424         free(optr);
3425 }
3426
3427 /*
3428  * helper function, updates the pointer to cmd with the length
3429  * of the current command, and also cleans up the first word of
3430  * the new command in case it has been clobbered before.
3431  */
3432 static ipfw_insn *
3433 next_cmd(ipfw_insn *cmd, int *len)
3434 {
3435         *len -= F_LEN(cmd);
3436         CHECK_LENGTH(*len, 0);
3437         cmd += F_LEN(cmd);
3438         bzero(cmd, sizeof(*cmd));
3439         return cmd;
3440 }
3441
3442 /*
3443  * Takes arguments and copies them into a comment
3444  */
3445 static void
3446 fill_comment(ipfw_insn *cmd, char **av, int cblen)
3447 {
3448         int i, l;
3449         char *p = (char *)(cmd + 1);
3450
3451         cmd->opcode = O_NOP;
3452         cmd->len =  (cmd->len & (F_NOT | F_OR));
3453
3454         /* Compute length of comment string. */
3455         for (i = 0, l = 0; av[i] != NULL; i++)
3456                 l += strlen(av[i]) + 1;
3457         if (l == 0)
3458                 return;
3459         if (l > 84)
3460                 errx(EX_DATAERR,
3461                     "comment too long (max 80 chars)");
3462         l = 1 + (l+3)/4;
3463         cmd->len =  (cmd->len & (F_NOT | F_OR)) | l;
3464         CHECK_CMDLEN;
3465
3466         for (i = 0; av[i] != NULL; i++) {
3467                 strcpy(p, av[i]);
3468                 p += strlen(av[i]);
3469                 *p++ = ' ';
3470         }
3471         *(--p) = '\0';
3472 }
3473
3474 /*
3475  * A function to fill simple commands of size 1.
3476  * Existing flags are preserved.
3477  */
3478 static void
3479 fill_cmd(ipfw_insn *cmd, enum ipfw_opcodes opcode, int flags, uint16_t arg)
3480 {
3481         cmd->opcode = opcode;
3482         cmd->len =  ((cmd->len | flags) & (F_NOT | F_OR)) | 1;
3483         cmd->arg1 = arg;
3484 }
3485
3486 /*
3487  * Fetch and add the MAC address and type, with masks. This generates one or
3488  * two microinstructions, and returns the pointer to the last one.
3489  */
3490 static ipfw_insn *
3491 add_mac(ipfw_insn *cmd, char *av[], int cblen)
3492 {
3493         ipfw_insn_mac *mac;
3494
3495         if ( ( av[0] == NULL ) || ( av[1] == NULL ) )
3496                 errx(EX_DATAERR, "MAC dst src");
3497
3498         cmd->opcode = O_MACADDR2;
3499         cmd->len = (cmd->len & (F_NOT | F_OR)) | F_INSN_SIZE(ipfw_insn_mac);
3500         CHECK_CMDLEN;
3501
3502         mac = (ipfw_insn_mac *)cmd;
3503         get_mac_addr_mask(av[0], mac->addr, mac->mask); /* dst */
3504         get_mac_addr_mask(av[1], &(mac->addr[ETHER_ADDR_LEN]),
3505             &(mac->mask[ETHER_ADDR_LEN])); /* src */
3506         return cmd;
3507 }
3508
3509 static ipfw_insn *
3510 add_mactype(ipfw_insn *cmd, char *av, int cblen)
3511 {
3512         if (!av)
3513                 errx(EX_DATAERR, "missing MAC type");
3514         if (strcmp(av, "any") != 0) { /* we have a non-null type */
3515                 fill_newports((ipfw_insn_u16 *)cmd, av, IPPROTO_ETHERTYPE,
3516                     cblen);
3517                 cmd->opcode = O_MAC_TYPE;
3518                 return cmd;
3519         } else
3520                 return NULL;
3521 }
3522
3523 static ipfw_insn *
3524 add_proto0(ipfw_insn *cmd, char *av, u_char *protop)
3525 {
3526         struct protoent *pe;
3527         char *ep;
3528         int proto;
3529
3530         proto = strtol(av, &ep, 10);
3531         if (*ep != '\0' || proto <= 0) {
3532                 if ((pe = getprotobyname(av)) == NULL)
3533                         return NULL;
3534                 proto = pe->p_proto;
3535         }
3536
3537         fill_cmd(cmd, O_PROTO, 0, proto);
3538         *protop = proto;
3539         return cmd;
3540 }
3541
3542 static ipfw_insn *
3543 add_proto(ipfw_insn *cmd, char *av, u_char *protop)
3544 {
3545         u_char proto = IPPROTO_IP;
3546
3547         if (_substrcmp(av, "all") == 0 || strcmp(av, "ip") == 0)
3548                 ; /* do not set O_IP4 nor O_IP6 */
3549         else if (strcmp(av, "ip4") == 0)
3550                 /* explicit "just IPv4" rule */
3551                 fill_cmd(cmd, O_IP4, 0, 0);
3552         else if (strcmp(av, "ip6") == 0) {
3553                 /* explicit "just IPv6" rule */
3554                 proto = IPPROTO_IPV6;
3555                 fill_cmd(cmd, O_IP6, 0, 0);
3556         } else
3557                 return add_proto0(cmd, av, protop);
3558
3559         *protop = proto;
3560         return cmd;
3561 }
3562
3563 static ipfw_insn *
3564 add_proto_compat(ipfw_insn *cmd, char *av, u_char *protop)
3565 {
3566         u_char proto = IPPROTO_IP;
3567
3568         if (_substrcmp(av, "all") == 0 || strcmp(av, "ip") == 0)
3569                 ; /* do not set O_IP4 nor O_IP6 */
3570         else if (strcmp(av, "ipv4") == 0 || strcmp(av, "ip4") == 0)
3571                 /* explicit "just IPv4" rule */
3572                 fill_cmd(cmd, O_IP4, 0, 0);
3573         else if (strcmp(av, "ipv6") == 0 || strcmp(av, "ip6") == 0) {
3574                 /* explicit "just IPv6" rule */
3575                 proto = IPPROTO_IPV6;
3576                 fill_cmd(cmd, O_IP6, 0, 0);
3577         } else
3578                 return add_proto0(cmd, av, protop);
3579
3580         *protop = proto;
3581         return cmd;
3582 }
3583
3584 static ipfw_insn *
3585 add_srcip(ipfw_insn *cmd, char *av, int cblen, struct tidx *tstate)
3586 {
3587         fill_ip((ipfw_insn_ip *)cmd, av, cblen, tstate);
3588         if (cmd->opcode == O_IP_DST_SET)                        /* set */
3589                 cmd->opcode = O_IP_SRC_SET;
3590         else if (cmd->opcode == O_IP_DST_LOOKUP)                /* table */
3591                 cmd->opcode = O_IP_SRC_LOOKUP;
3592         else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn))          /* me */
3593                 cmd->opcode = O_IP_SRC_ME;
3594         else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_u32))      /* one IP */
3595                 cmd->opcode = O_IP_SRC;
3596         else                                                    /* addr/mask */
3597                 cmd->opcode = O_IP_SRC_MASK;
3598         return cmd;
3599 }
3600
3601 static ipfw_insn *
3602 add_dstip(ipfw_insn *cmd, char *av, int cblen, struct tidx *tstate)
3603 {
3604         fill_ip((ipfw_insn_ip *)cmd, av, cblen, tstate);
3605         if (cmd->opcode == O_IP_DST_SET)                        /* set */
3606                 ;
3607         else if (cmd->opcode == O_IP_DST_LOOKUP)                /* table */
3608                 ;
3609         else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn))          /* me */
3610                 cmd->opcode = O_IP_DST_ME;
3611         else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_u32))      /* one IP */
3612                 cmd->opcode = O_IP_DST;
3613         else                                                    /* addr/mask */
3614                 cmd->opcode = O_IP_DST_MASK;
3615         return cmd;
3616 }
3617
3618 static struct _s_x f_reserved_keywords[] = {
3619         { "altq",       TOK_OR },
3620         { "//",         TOK_OR },
3621         { "diverted",   TOK_OR },
3622         { "dst-port",   TOK_OR },
3623         { "src-port",   TOK_OR },
3624         { "established",        TOK_OR },
3625         { "keep-state", TOK_OR },
3626         { "frag",       TOK_OR },
3627         { "icmptypes",  TOK_OR },
3628         { "in",         TOK_OR },
3629         { "out",        TOK_OR },
3630         { "ip6",        TOK_OR },
3631         { "any",        TOK_OR },
3632         { "to",         TOK_OR },
3633         { "via",        TOK_OR },
3634         { "{",          TOK_OR },
3635         { NULL, 0 }     /* terminator */
3636 };
3637
3638 static ipfw_insn *
3639 add_ports(ipfw_insn *cmd, char *av, u_char proto, int opcode, int cblen)
3640 {
3641
3642         if (match_token(f_reserved_keywords, av) != -1)
3643                 return (NULL);
3644
3645         if (fill_newports((ipfw_insn_u16 *)cmd, av, proto, cblen)) {
3646                 /* XXX todo: check that we have a protocol with ports */
3647                 cmd->opcode = opcode;
3648                 return cmd;
3649         }
3650         return NULL;
3651 }
3652
3653 static ipfw_insn *
3654 add_src(ipfw_insn *cmd, char *av, u_char proto, int cblen, struct tidx *tstate)
3655 {
3656         struct in6_addr a;
3657         char *host, *ch, buf[INET6_ADDRSTRLEN];
3658         ipfw_insn *ret = NULL;
3659         int len;
3660
3661         /* Copy first address in set if needed */
3662         if ((ch = strpbrk(av, "/,")) != NULL) {
3663                 len = ch - av;
3664                 strlcpy(buf, av, sizeof(buf));
3665                 if (len < sizeof(buf))
3666                         buf[len] = '\0';
3667                 host = buf;
3668         } else
3669                 host = av;
3670
3671         if (proto == IPPROTO_IPV6  || strcmp(av, "me6") == 0 ||
3672             inet_pton(AF_INET6, host, &a) == 1)
3673                 ret = add_srcip6(cmd, av, cblen, tstate);
3674         /* XXX: should check for IPv4, not !IPv6 */
3675         if (ret == NULL && (proto == IPPROTO_IP || strcmp(av, "me") == 0 ||
3676             inet_pton(AF_INET6, host, &a) != 1))
3677                 ret = add_srcip(cmd, av, cblen, tstate);
3678         if (ret == NULL && strcmp(av, "any") != 0)
3679                 ret = cmd;
3680
3681         return ret;
3682 }
3683
3684 static ipfw_insn *
3685 add_dst(ipfw_insn *cmd, char *av, u_char proto, int cblen, struct tidx *tstate)
3686 {
3687         struct in6_addr a;
3688         char *host, *ch, buf[INET6_ADDRSTRLEN];
3689         ipfw_insn *ret = NULL;
3690         int len;
3691
3692         /* Copy first address in set if needed */
3693         if ((ch = strpbrk(av, "/,")) != NULL) {
3694                 len = ch - av;
3695                 strlcpy(buf, av, sizeof(buf));
3696                 if (len < sizeof(buf))
3697                         buf[len] = '\0';
3698                 host = buf;
3699         } else
3700                 host = av;
3701
3702         if (proto == IPPROTO_IPV6  || strcmp(av, "me6") == 0 ||
3703             inet_pton(AF_INET6, host, &a) == 1)
3704                 ret = add_dstip6(cmd, av, cblen, tstate);
3705         /* XXX: should check for IPv4, not !IPv6 */
3706         if (ret == NULL && (proto == IPPROTO_IP || strcmp(av, "me") == 0 ||
3707             inet_pton(AF_INET6, host, &a) != 1))
3708                 ret = add_dstip(cmd, av, cblen, tstate);
3709         if (ret == NULL && strcmp(av, "any") != 0)
3710                 ret = cmd;
3711
3712         return ret;
3713 }
3714
3715 /*
3716  * Parse arguments and assemble the microinstructions which make up a rule.
3717  * Rules are added into the 'rulebuf' and then copied in the correct order
3718  * into the actual rule.
3719  *
3720  * The syntax for a rule starts with the action, followed by
3721  * optional action parameters, and the various match patterns.
3722  * In the assembled microcode, the first opcode must be an O_PROBE_STATE
3723  * (generated if the rule includes a keep-state option), then the
3724  * various match patterns, log/altq actions, and the actual action.
3725  *
3726  */
3727 void
3728 compile_rule(char *av[], uint32_t *rbuf, int *rbufsize, struct tidx *tstate)
3729 {
3730         /*
3731          * rules are added into the 'rulebuf' and then copied in
3732          * the correct order into the actual rule.
3733          * Some things that need to go out of order (prob, action etc.)
3734          * go into actbuf[].
3735          */
3736         static uint32_t actbuf[255], cmdbuf[255];
3737         int rblen, ablen, cblen;
3738
3739         ipfw_insn *src, *dst, *cmd, *action, *prev=NULL;
3740         ipfw_insn *first_cmd;   /* first match pattern */
3741
3742         struct ip_fw_rule *rule;
3743
3744         /*
3745          * various flags used to record that we entered some fields.
3746          */
3747         ipfw_insn *have_state = NULL;   /* any state-related option */
3748         int have_rstate = 0;
3749         ipfw_insn *have_log = NULL, *have_altq = NULL, *have_tag = NULL;
3750         ipfw_insn *have_skipcmd = NULL;
3751         size_t len;
3752
3753         int i;
3754
3755         int open_par = 0;       /* open parenthesis ( */
3756
3757         /* proto is here because it is used to fetch ports */
3758         u_char proto = IPPROTO_IP;      /* default protocol */
3759
3760         double match_prob = 1; /* match probability, default is always match */
3761
3762         bzero(actbuf, sizeof(actbuf));          /* actions go here */
3763         bzero(cmdbuf, sizeof(cmdbuf));
3764         bzero(rbuf, *rbufsize);
3765
3766         rule = (struct ip_fw_rule *)rbuf;
3767         cmd = (ipfw_insn *)cmdbuf;
3768         action = (ipfw_insn *)actbuf;
3769
3770         rblen = *rbufsize / sizeof(uint32_t);
3771         rblen -= sizeof(struct ip_fw_rule) / sizeof(uint32_t);
3772         ablen = sizeof(actbuf) / sizeof(actbuf[0]);
3773         cblen = sizeof(cmdbuf) / sizeof(cmdbuf[0]);
3774         cblen -= F_INSN_SIZE(ipfw_insn_u32) + 1;
3775
3776 #define CHECK_RBUFLEN(len)      { CHECK_LENGTH(rblen, len); rblen -= len; }
3777 #define CHECK_ACTLEN            CHECK_LENGTH(ablen, action->len)
3778
3779         av++;
3780
3781         /* [rule N]     -- Rule number optional */
3782         if (av[0] && isdigit(**av)) {
3783                 rule->rulenum = atoi(*av);
3784                 av++;
3785         }
3786
3787         /* [set N]      -- set number (0..RESVD_SET), optional */
3788         if (av[0] && av[1] && _substrcmp(*av, "set") == 0) {
3789                 int set = strtoul(av[1], NULL, 10);
3790                 if (set < 0 || set > RESVD_SET)
3791                         errx(EX_DATAERR, "illegal set %s", av[1]);
3792                 rule->set = set;
3793                 tstate->set = set;
3794                 av += 2;
3795         }
3796
3797         /* [prob D]     -- match probability, optional */
3798         if (av[0] && av[1] && _substrcmp(*av, "prob") == 0) {
3799                 match_prob = strtod(av[1], NULL);
3800
3801                 if (match_prob <= 0 || match_prob > 1)
3802                         errx(EX_DATAERR, "illegal match prob. %s", av[1]);
3803                 av += 2;
3804         }
3805
3806         /* action       -- mandatory */
3807         NEED1("missing action");
3808         i = match_token(rule_actions, *av);
3809         av++;
3810         action->len = 1;        /* default */
3811         CHECK_ACTLEN;
3812         switch(i) {
3813         case TOK_CHECKSTATE:
3814                 have_state = action;
3815                 action->opcode = O_CHECK_STATE;
3816                 if (*av == NULL ||
3817                     match_token(rule_options, *av) == TOK_COMMENT) {
3818                         action->arg1 = pack_object(tstate,
3819                             default_state_name, IPFW_TLV_STATE_NAME);
3820                         break;
3821                 }
3822                 if (*av[0] == ':') {
3823                         if (strcmp(*av + 1, "any") == 0)
3824                                 action->arg1 = 0;
3825                         else if (state_check_name(*av + 1) == 0)
3826                                 action->arg1 = pack_object(tstate, *av + 1,
3827                                     IPFW_TLV_STATE_NAME);
3828                         else
3829                                 errx(EX_DATAERR, "Invalid state name %s",
3830                                     *av);
3831                         av++;
3832                         break;
3833                 }
3834                 errx(EX_DATAERR, "Invalid state name %s", *av);
3835                 break;
3836
3837         case TOK_ABORT:
3838                 action->opcode = O_REJECT;
3839                 action->arg1 = ICMP_REJECT_ABORT;
3840                 break;
3841
3842         case TOK_ABORT6:
3843                 action->opcode = O_UNREACH6;
3844                 action->arg1 = ICMP6_UNREACH_ABORT;
3845                 break;
3846
3847         case TOK_ACCEPT:
3848                 action->opcode = O_ACCEPT;
3849                 break;
3850
3851         case TOK_DENY:
3852                 action->opcode = O_DENY;
3853                 action->arg1 = 0;
3854                 break;
3855
3856         case TOK_REJECT:
3857                 action->opcode = O_REJECT;
3858                 action->arg1 = ICMP_UNREACH_HOST;
3859                 break;
3860
3861         case TOK_RESET:
3862                 action->opcode = O_REJECT;
3863                 action->arg1 = ICMP_REJECT_RST;
3864                 break;
3865
3866         case TOK_RESET6:
3867                 action->opcode = O_UNREACH6;
3868                 action->arg1 = ICMP6_UNREACH_RST;
3869                 break;
3870
3871         case TOK_UNREACH:
3872                 action->opcode = O_REJECT;
3873                 NEED1("missing reject code");
3874                 fill_reject_code(&action->arg1, *av);
3875                 av++;
3876                 break;
3877
3878         case TOK_UNREACH6:
3879                 action->opcode = O_UNREACH6;
3880                 NEED1("missing unreach code");
3881                 fill_unreach6_code(&action->arg1, *av);
3882                 av++;
3883                 break;
3884
3885         case TOK_COUNT:
3886                 action->opcode = O_COUNT;
3887                 break;
3888
3889         case TOK_NAT:
3890                 action->opcode = O_NAT;
3891                 action->len = F_INSN_SIZE(ipfw_insn_nat);
3892                 CHECK_ACTLEN;
3893                 if (*av != NULL && _substrcmp(*av, "global") == 0) {
3894                         action->arg1 = IP_FW_NAT44_GLOBAL;
3895                         av++;
3896                         break;
3897                 } else
3898                         goto chkarg;
3899         case TOK_QUEUE:
3900                 action->opcode = O_QUEUE;
3901                 goto chkarg;
3902         case TOK_PIPE:
3903                 action->opcode = O_PIPE;
3904                 goto chkarg;
3905         case TOK_SKIPTO:
3906                 action->opcode = O_SKIPTO;
3907                 goto chkarg;
3908         case TOK_NETGRAPH:
3909                 action->opcode = O_NETGRAPH;
3910                 goto chkarg;
3911         case TOK_NGTEE:
3912                 action->opcode = O_NGTEE;
3913                 goto chkarg;
3914         case TOK_DIVERT:
3915                 action->opcode = O_DIVERT;
3916                 goto chkarg;
3917         case TOK_TEE:
3918                 action->opcode = O_TEE;
3919                 goto chkarg;
3920         case TOK_CALL:
3921                 action->opcode = O_CALLRETURN;
3922 chkarg:
3923                 if (!av[0])
3924                         errx(EX_USAGE, "missing argument for %s", *(av - 1));
3925                 if (isdigit(**av)) {
3926                         action->arg1 = strtoul(*av, NULL, 10);
3927                         if (action->arg1 <= 0 || action->arg1 >= IP_FW_TABLEARG)
3928                                 errx(EX_DATAERR, "illegal argument for %s",
3929                                     *(av - 1));
3930                 } else if (_substrcmp(*av, "tablearg") == 0) {
3931                         action->arg1 = IP_FW_TARG;
3932                 } else if (i == TOK_DIVERT || i == TOK_TEE) {
3933                         struct servent *s;
3934                         setservent(1);
3935                         s = getservbyname(av[0], "divert");
3936                         if (s != NULL)
3937                                 action->arg1 = ntohs(s->s_port);
3938                         else
3939                                 errx(EX_DATAERR, "illegal divert/tee port");
3940                 } else
3941                         errx(EX_DATAERR, "illegal argument for %s", *(av - 1));
3942                 av++;
3943                 break;
3944
3945         case TOK_FORWARD: {
3946                 /*
3947                  * Locate the address-port separator (':' or ',').
3948                  * Could be one of the following:
3949                  *      hostname:port
3950                  *      IPv4 a.b.c.d,port
3951                  *      IPv4 a.b.c.d:port
3952                  *      IPv6 w:x:y::z,port
3953                  * The ':' can only be used with hostname and IPv4 address.
3954                  * XXX-BZ Should we also support [w:x:y::z]:port?
3955                  */
3956                 struct sockaddr_storage result;
3957                 struct addrinfo *res;
3958                 char *s, *end;
3959                 int family;
3960                 u_short port_number;
3961
3962                 NEED1("missing forward address[:port]");
3963
3964                 /*
3965                  * locate the address-port separator (':' or ',')
3966                  */
3967                 s = strchr(*av, ',');
3968                 if (s == NULL) {
3969                         /* Distinguish between IPv4:port and IPv6 cases. */
3970                         s = strchr(*av, ':');
3971                         if (s && strchr(s+1, ':'))
3972                                 s = NULL; /* no port */
3973                 }
3974
3975                 port_number = 0;
3976                 if (s != NULL) {
3977                         /* Terminate host portion and set s to start of port. */
3978                         *(s++) = '\0';
3979                         i = strtoport(s, &end, 0 /* base */, 0 /* proto */);
3980                         if (s == end)
3981                                 errx(EX_DATAERR,
3982                                     "illegal forwarding port ``%s''", s);
3983                         port_number = (u_short)i;
3984                 }
3985
3986                 if (_substrcmp(*av, "tablearg") == 0) {
3987                         family = PF_INET;
3988                         ((struct sockaddr_in*)&result)->sin_addr.s_addr =
3989                             INADDR_ANY;
3990                 } else {
3991                         /*
3992                          * Resolve the host name or address to a family and a
3993                          * network representation of the address.
3994                          */
3995                         if (getaddrinfo(*av, NULL, NULL, &res))
3996                                 errx(EX_DATAERR, NULL);
3997                         /* Just use the first host in the answer. */
3998                         family = res->ai_family;
3999                         memcpy(&result, res->ai_addr, res->ai_addrlen);
4000                         freeaddrinfo(res);
4001                 }
4002
4003                 if (family == PF_INET) {
4004                         ipfw_insn_sa *p = (ipfw_insn_sa *)action;
4005
4006                         action->opcode = O_FORWARD_IP;
4007                         action->len = F_INSN_SIZE(ipfw_insn_sa);
4008                         CHECK_ACTLEN;
4009
4010                         /*
4011                          * In the kernel we assume AF_INET and use only
4012                          * sin_port and sin_addr. Remember to set sin_len as
4013                          * the routing code seems to use it too.
4014                          */
4015                         p->sa.sin_len = sizeof(struct sockaddr_in);
4016                         p->sa.sin_family = AF_INET;
4017                         p->sa.sin_port = port_number;
4018                         p->sa.sin_addr.s_addr =
4019                              ((struct sockaddr_in *)&result)->sin_addr.s_addr;
4020                 } else if (family == PF_INET6) {
4021                         ipfw_insn_sa6 *p = (ipfw_insn_sa6 *)action;
4022
4023                         action->opcode = O_FORWARD_IP6;
4024                         action->len = F_INSN_SIZE(ipfw_insn_sa6);
4025                         CHECK_ACTLEN;
4026
4027                         p->sa.sin6_len = sizeof(struct sockaddr_in6);
4028                         p->sa.sin6_family = AF_INET6;
4029                         p->sa.sin6_port = port_number;
4030                         p->sa.sin6_flowinfo = 0;
4031                         p->sa.sin6_scope_id =
4032                             ((struct sockaddr_in6 *)&result)->sin6_scope_id;
4033                         bcopy(&((struct sockaddr_in6*)&result)->sin6_addr,
4034                             &p->sa.sin6_addr, sizeof(p->sa.sin6_addr));
4035                 } else {
4036                         errx(EX_DATAERR, "Invalid address family in forward action");
4037                 }
4038                 av++;
4039                 break;
4040             }
4041         case TOK_COMMENT:
4042                 /* pretend it is a 'count' rule followed by the comment */
4043                 action->opcode = O_COUNT;
4044                 av--;           /* go back... */
4045                 break;
4046
4047         case TOK_SETFIB:
4048             {
4049                 int numfibs;
4050                 size_t intsize = sizeof(int);
4051
4052                 action->opcode = O_SETFIB;
4053                 NEED1("missing fib number");
4054                 if (_substrcmp(*av, "tablearg") == 0) {
4055                         action->arg1 = IP_FW_TARG;
4056                 } else {
4057                         action->arg1 = strtoul(*av, NULL, 10);
4058                         if (sysctlbyname("net.fibs", &numfibs, &intsize,
4059                             NULL, 0) == -1)
4060                                 errx(EX_DATAERR, "fibs not suported.\n");
4061                         if (action->arg1 >= numfibs)  /* Temporary */
4062                                 errx(EX_DATAERR, "fib too large.\n");
4063                         /* Add high-order bit to fib to make room for tablearg*/
4064                         action->arg1 |= 0x8000;
4065                 }
4066                 av++;
4067                 break;
4068             }
4069
4070         case TOK_SETDSCP:
4071             {
4072                 int code;
4073
4074                 action->opcode = O_SETDSCP;
4075                 NEED1("missing DSCP code");
4076                 if (_substrcmp(*av, "tablearg") == 0) {
4077                         action->arg1 = IP_FW_TARG;
4078                 } else {
4079                         if (isalpha(*av[0])) {
4080                                 if ((code = match_token(f_ipdscp, *av)) == -1)
4081                                         errx(EX_DATAERR, "Unknown DSCP code");
4082                                 action->arg1 = code;
4083                         } else
4084                                 action->arg1 = strtoul(*av, NULL, 10);
4085                         /*
4086                          * Add high-order bit to DSCP to make room
4087                          * for tablearg
4088                          */
4089                         action->arg1 |= 0x8000;
4090                 }
4091                 av++;
4092                 break;
4093             }
4094
4095         case TOK_REASS:
4096                 action->opcode = O_REASS;
4097                 break;
4098
4099         case TOK_RETURN:
4100                 fill_cmd(action, O_CALLRETURN, F_NOT, 0);
4101                 break;
4102
4103         case TOK_TCPSETMSS: {
4104                 u_long mss;
4105                 uint16_t idx;
4106
4107                 idx = pack_object(tstate, "tcp-setmss", IPFW_TLV_EACTION);
4108                 if (idx == 0)
4109                         errx(EX_DATAERR, "pack_object failed");
4110                 fill_cmd(action, O_EXTERNAL_ACTION, 0, idx);
4111                 NEED1("Missing MSS value");
4112                 action = next_cmd(action, &ablen);
4113                 action->len = 1;
4114                 CHECK_ACTLEN;
4115                 mss = strtoul(*av, NULL, 10);
4116                 if (mss == 0 || mss > UINT16_MAX)
4117                         errx(EX_USAGE, "invalid MSS value %s", *av);
4118                 fill_cmd(action, O_EXTERNAL_DATA, 0, (uint16_t)mss);
4119                 av++;
4120                 break;
4121         }
4122
4123         default:
4124                 av--;
4125                 if (match_token(rule_eactions, *av) == -1)
4126                         errx(EX_DATAERR, "invalid action %s\n", *av);
4127                 /*
4128                  * External actions support.
4129                  * XXX: we support only syntax with instance name.
4130                  *      For known external actions (from rule_eactions list)
4131                  *      we can handle syntax directly. But with `eaction'
4132                  *      keyword we can use only `eaction <name> <instance>'
4133                  *      syntax.
4134                  */
4135         case TOK_EACTION: {
4136                 uint16_t idx;
4137
4138                 NEED1("Missing eaction name");
4139                 if (eaction_check_name(*av) != 0)
4140                         errx(EX_DATAERR, "Invalid eaction name %s", *av);
4141                 idx = pack_object(tstate, *av, IPFW_TLV_EACTION);
4142                 if (idx == 0)
4143                         errx(EX_DATAERR, "pack_object failed");
4144                 fill_cmd(action, O_EXTERNAL_ACTION, 0, idx);
4145                 av++;
4146                 NEED1("Missing eaction instance name");
4147                 action = next_cmd(action, &ablen);
4148                 action->len = 1;
4149                 CHECK_ACTLEN;
4150                 if (eaction_check_name(*av) != 0)
4151                         errx(EX_DATAERR, "Invalid eaction instance name %s",
4152                             *av);
4153                 /*
4154                  * External action instance object has TLV type depended
4155                  * from the external action name object index. Since we
4156                  * currently don't know this index, use zero as TLV type.
4157                  */
4158                 idx = pack_object(tstate, *av, 0);
4159                 if (idx == 0)
4160                         errx(EX_DATAERR, "pack_object failed");
4161                 fill_cmd(action, O_EXTERNAL_INSTANCE, 0, idx);
4162                 av++;
4163                 }
4164         }
4165         action = next_cmd(action, &ablen);
4166
4167         /*
4168          * [altq queuename] -- altq tag, optional
4169          * [log [logamount N]]  -- log, optional
4170          *
4171          * If they exist, it go first in the cmdbuf, but then it is
4172          * skipped in the copy section to the end of the buffer.
4173          */
4174         while (av[0] != NULL && (i = match_token(rule_action_params, *av)) != -1) {
4175                 av++;
4176                 switch (i) {
4177                 case TOK_LOG:
4178                     {
4179                         ipfw_insn_log *c = (ipfw_insn_log *)cmd;
4180                         int l;
4181
4182                         if (have_log)
4183                                 errx(EX_DATAERR,
4184                                     "log cannot be specified more than once");
4185                         have_log = (ipfw_insn *)c;
4186                         cmd->len = F_INSN_SIZE(ipfw_insn_log);
4187                         CHECK_CMDLEN;
4188                         cmd->opcode = O_LOG;
4189                         if (av[0] && _substrcmp(*av, "logamount") == 0) {
4190                                 av++;
4191                                 NEED1("logamount requires argument");
4192                                 l = atoi(*av);
4193                                 if (l < 0)
4194                                         errx(EX_DATAERR,
4195                                             "logamount must be positive");
4196                                 c->max_log = l;
4197                                 av++;
4198                         } else {
4199                                 len = sizeof(c->max_log);
4200                                 if (sysctlbyname("net.inet.ip.fw.verbose_limit",
4201                                     &c->max_log, &len, NULL, 0) == -1) {
4202                                         if (co.test_only) {
4203                                                 c->max_log = 0;
4204                                                 break;
4205                                         }
4206                                         errx(1, "sysctlbyname(\"%s\")",
4207                                             "net.inet.ip.fw.verbose_limit");
4208                                 }
4209                         }
4210                     }
4211                         break;
4212
4213 #ifndef NO_ALTQ
4214                 case TOK_ALTQ:
4215                     {
4216                         ipfw_insn_altq *a = (ipfw_insn_altq *)cmd;
4217
4218                         NEED1("missing altq queue name");
4219                         if (have_altq)
4220                                 errx(EX_DATAERR,
4221                                     "altq cannot be specified more than once");
4222                         have_altq = (ipfw_insn *)a;
4223                         cmd->len = F_INSN_SIZE(ipfw_insn_altq);
4224                         CHECK_CMDLEN;
4225                         cmd->opcode = O_ALTQ;
4226                         a->qid = altq_name_to_qid(*av);
4227                         av++;
4228                     }
4229                         break;
4230 #endif
4231
4232                 case TOK_TAG:
4233                 case TOK_UNTAG: {
4234                         uint16_t tag;
4235
4236                         if (have_tag)
4237                                 errx(EX_USAGE, "tag and untag cannot be "
4238                                     "specified more than once");
4239                         GET_UINT_ARG(tag, IPFW_ARG_MIN, IPFW_ARG_MAX, i,
4240                            rule_action_params);
4241                         have_tag = cmd;
4242                         fill_cmd(cmd, O_TAG, (i == TOK_TAG) ? 0: F_NOT, tag);
4243                         av++;
4244                         break;
4245                 }
4246
4247                 default:
4248                         abort();
4249                 }
4250                 cmd = next_cmd(cmd, &cblen);
4251         }
4252
4253         if (have_state) { /* must be a check-state, we are done */
4254                 if (*av != NULL &&
4255                     match_token(rule_options, *av) == TOK_COMMENT) {
4256                         /* check-state has a comment */
4257                         av++;
4258                         fill_comment(cmd, av, cblen);
4259                         cmd = next_cmd(cmd, &cblen);
4260                         av[0] = NULL;
4261                 }
4262                 goto done;
4263         }
4264
4265 #define OR_START(target)                                        \
4266         if (av[0] && (*av[0] == '(' || *av[0] == '{')) {        \
4267                 if (open_par)                                   \
4268                         errx(EX_USAGE, "nested \"(\" not allowed\n"); \
4269                 prev = NULL;                                    \
4270                 open_par = 1;                                   \
4271                 if ( (av[0])[1] == '\0') {                      \
4272                         av++;                                   \
4273                 } else                                          \
4274                         (*av)++;                                \
4275         }                                                       \
4276         target:                                                 \
4277
4278
4279 #define CLOSE_PAR                                               \
4280         if (open_par) {                                         \
4281                 if (av[0] && (                                  \
4282                     strcmp(*av, ")") == 0 ||                    \
4283                     strcmp(*av, "}") == 0)) {                   \
4284                         prev = NULL;                            \
4285                         open_par = 0;                           \
4286                         av++;                                   \
4287                 } else                                          \
4288                         errx(EX_USAGE, "missing \")\"\n");      \
4289         }
4290
4291 #define NOT_BLOCK                                               \
4292         if (av[0] && _substrcmp(*av, "not") == 0) {             \
4293                 if (cmd->len & F_NOT)                           \
4294                         errx(EX_USAGE, "double \"not\" not allowed\n"); \
4295                 cmd->len |= F_NOT;                              \
4296                 av++;                                           \
4297         }
4298
4299 #define OR_BLOCK(target)                                        \
4300         if (av[0] && _substrcmp(*av, "or") == 0) {              \
4301                 if (prev == NULL || open_par == 0)              \
4302                         errx(EX_DATAERR, "invalid OR block");   \
4303                 prev->len |= F_OR;                              \
4304                 av++;                                   \
4305                 goto target;                                    \
4306         }                                                       \
4307         CLOSE_PAR;
4308
4309         first_cmd = cmd;
4310
4311 #if 0
4312         /*
4313          * MAC addresses, optional.
4314          * If we have this, we skip the part "proto from src to dst"
4315          * and jump straight to the option parsing.
4316          */
4317         NOT_BLOCK;
4318         NEED1("missing protocol");
4319         if (_substrcmp(*av, "MAC") == 0 ||
4320             _substrcmp(*av, "mac") == 0) {
4321                 av++;                   /* the "MAC" keyword */
4322                 add_mac(cmd, av);       /* exits in case of errors */
4323                 cmd = next_cmd(cmd);
4324                 av += 2;                /* dst-mac and src-mac */
4325                 NOT_BLOCK;
4326                 NEED1("missing mac type");
4327                 if (add_mactype(cmd, av[0]))
4328                         cmd = next_cmd(cmd);
4329                 av++;                   /* any or mac-type */
4330                 goto read_options;
4331         }
4332 #endif
4333
4334         /*
4335          * protocol, mandatory
4336          */
4337     OR_START(get_proto);
4338         NOT_BLOCK;
4339         NEED1("missing protocol");
4340         if (add_proto_compat(cmd, *av, &proto)) {
4341                 av++;
4342                 if (F_LEN(cmd) != 0) {
4343                         prev = cmd;
4344                         cmd = next_cmd(cmd, &cblen);
4345                 }
4346         } else if (first_cmd != cmd) {
4347                 errx(EX_DATAERR, "invalid protocol ``%s''", *av);
4348         } else {
4349                 rule->flags |= IPFW_RULE_JUSTOPTS;
4350                 goto read_options;
4351         }
4352     OR_BLOCK(get_proto);
4353
4354         /*
4355          * "from", mandatory
4356          */
4357         if ((av[0] == NULL) || _substrcmp(*av, "from") != 0)
4358                 errx(EX_USAGE, "missing ``from''");
4359         av++;
4360
4361         /*
4362          * source IP, mandatory
4363          */
4364     OR_START(source_ip);
4365         NOT_BLOCK;      /* optional "not" */
4366         NEED1("missing source address");
4367         if (add_src(cmd, *av, proto, cblen, tstate)) {
4368                 av++;
4369                 if (F_LEN(cmd) != 0) {  /* ! any */
4370                         prev = cmd;
4371                         cmd = next_cmd(cmd, &cblen);
4372                 }
4373         } else
4374                 errx(EX_USAGE, "bad source address %s", *av);
4375     OR_BLOCK(source_ip);
4376
4377         /*
4378          * source ports, optional
4379          */
4380         NOT_BLOCK;      /* optional "not" */
4381         if ( av[0] != NULL ) {
4382                 if (_substrcmp(*av, "any") == 0 ||
4383                     add_ports(cmd, *av, proto, O_IP_SRCPORT, cblen)) {
4384                         av++;
4385                         if (F_LEN(cmd) != 0)
4386                                 cmd = next_cmd(cmd, &cblen);
4387                 }
4388         }
4389
4390         /*
4391          * "to", mandatory
4392          */
4393         if ( (av[0] == NULL) || _substrcmp(*av, "to") != 0 )
4394                 errx(EX_USAGE, "missing ``to''");
4395         av++;
4396
4397         /*
4398          * destination, mandatory
4399          */
4400     OR_START(dest_ip);
4401         NOT_BLOCK;      /* optional "not" */
4402         NEED1("missing dst address");
4403         if (add_dst(cmd, *av, proto, cblen, tstate)) {
4404                 av++;
4405                 if (F_LEN(cmd) != 0) {  /* ! any */
4406                         prev = cmd;
4407                         cmd = next_cmd(cmd, &cblen);
4408                 }
4409         } else
4410                 errx( EX_USAGE, "bad destination address %s", *av);
4411     OR_BLOCK(dest_ip);
4412
4413         /*
4414          * dest. ports, optional
4415          */
4416         NOT_BLOCK;      /* optional "not" */
4417         if (av[0]) {
4418                 if (_substrcmp(*av, "any") == 0 ||
4419                     add_ports(cmd, *av, proto, O_IP_DSTPORT, cblen)) {
4420                         av++;
4421                         if (F_LEN(cmd) != 0)
4422                                 cmd = next_cmd(cmd, &cblen);
4423                 }
4424         }
4425
4426 read_options:
4427         prev = NULL;
4428         while ( av[0] != NULL ) {
4429                 char *s;
4430                 ipfw_insn_u32 *cmd32;   /* alias for cmd */
4431
4432                 s = *av;
4433                 cmd32 = (ipfw_insn_u32 *)cmd;
4434
4435                 if (*s == '!') {        /* alternate syntax for NOT */
4436                         if (cmd->len & F_NOT)
4437                                 errx(EX_USAGE, "double \"not\" not allowed\n");
4438                         cmd->len = F_NOT;
4439                         s++;
4440                 }
4441                 i = match_token(rule_options, s);
4442                 av++;
4443                 switch(i) {
4444                 case TOK_NOT:
4445                         if (cmd->len & F_NOT)
4446                                 errx(EX_USAGE, "double \"not\" not allowed\n");
4447                         cmd->len = F_NOT;
4448                         break;
4449
4450                 case TOK_OR:
4451                         if (open_par == 0 || prev == NULL)
4452                                 errx(EX_USAGE, "invalid \"or\" block\n");
4453                         prev->len |= F_OR;
4454                         break;
4455
4456                 case TOK_STARTBRACE:
4457                         if (open_par)
4458                                 errx(EX_USAGE, "+nested \"(\" not allowed\n");
4459                         open_par = 1;
4460                         break;
4461
4462                 case TOK_ENDBRACE:
4463                         if (!open_par)
4464                                 errx(EX_USAGE, "+missing \")\"\n");
4465                         open_par = 0;
4466                         prev = NULL;
4467                         break;
4468
4469                 case TOK_IN:
4470                         fill_cmd(cmd, O_IN, 0, 0);
4471                         break;
4472
4473                 case TOK_OUT:
4474                         cmd->len ^= F_NOT; /* toggle F_NOT */
4475                         fill_cmd(cmd, O_IN, 0, 0);
4476                         break;
4477
4478                 case TOK_DIVERTED:
4479                         fill_cmd(cmd, O_DIVERTED, 0, 3);
4480                         break;
4481
4482                 case TOK_DIVERTEDLOOPBACK:
4483                         fill_cmd(cmd, O_DIVERTED, 0, 1);
4484                         break;
4485
4486                 case TOK_DIVERTEDOUTPUT:
4487                         fill_cmd(cmd, O_DIVERTED, 0, 2);
4488                         break;
4489
4490                 case TOK_FRAG:
4491                         fill_cmd(cmd, O_FRAG, 0, 0);
4492                         break;
4493
4494                 case TOK_LAYER2:
4495                         fill_cmd(cmd, O_LAYER2, 0, 0);
4496                         break;
4497
4498                 case TOK_XMIT:
4499                 case TOK_RECV:
4500                 case TOK_VIA:
4501                         NEED1("recv, xmit, via require interface name"
4502                                 " or address");
4503                         fill_iface((ipfw_insn_if *)cmd, av[0], cblen, tstate);
4504                         av++;
4505                         if (F_LEN(cmd) == 0)    /* not a valid address */
4506                                 break;
4507                         if (i == TOK_XMIT)
4508                                 cmd->opcode = O_XMIT;
4509                         else if (i == TOK_RECV)
4510                                 cmd->opcode = O_RECV;
4511                         else if (i == TOK_VIA)
4512                                 cmd->opcode = O_VIA;
4513                         break;
4514
4515                 case TOK_ICMPTYPES:
4516                         NEED1("icmptypes requires list of types");
4517                         fill_icmptypes((ipfw_insn_u32 *)cmd, *av);
4518                         av++;
4519                         break;
4520
4521                 case TOK_ICMP6TYPES:
4522                         NEED1("icmptypes requires list of types");
4523                         fill_icmp6types((ipfw_insn_icmp6 *)cmd, *av, cblen);
4524                         av++;
4525                         break;
4526
4527                 case TOK_IPTTL:
4528                         NEED1("ipttl requires TTL");
4529                         if (strpbrk(*av, "-,")) {
4530                             if (!add_ports(cmd, *av, 0, O_IPTTL, cblen))
4531                                 errx(EX_DATAERR, "invalid ipttl %s", *av);
4532                         } else
4533                             fill_cmd(cmd, O_IPTTL, 0, strtoul(*av, NULL, 0));
4534                         av++;
4535                         break;
4536
4537                 case TOK_IPID:
4538                         NEED1("ipid requires id");
4539                         if (strpbrk(*av, "-,")) {
4540                             if (!add_ports(cmd, *av, 0, O_IPID, cblen))
4541                                 errx(EX_DATAERR, "invalid ipid %s", *av);
4542                         } else
4543                             fill_cmd(cmd, O_IPID, 0, strtoul(*av, NULL, 0));
4544                         av++;
4545                         break;
4546
4547                 case TOK_IPLEN:
4548                         NEED1("iplen requires length");
4549                         if (strpbrk(*av, "-,")) {
4550                             if (!add_ports(cmd, *av, 0, O_IPLEN, cblen))
4551                                 errx(EX_DATAERR, "invalid ip len %s", *av);
4552                         } else
4553                             fill_cmd(cmd, O_IPLEN, 0, strtoul(*av, NULL, 0));
4554                         av++;
4555                         break;
4556
4557                 case TOK_IPVER:
4558                         NEED1("ipver requires version");
4559                         fill_cmd(cmd, O_IPVER, 0, strtoul(*av, NULL, 0));
4560                         av++;
4561                         break;
4562
4563                 case TOK_IPPRECEDENCE:
4564                         NEED1("ipprecedence requires value");
4565                         fill_cmd(cmd, O_IPPRECEDENCE, 0,
4566                             (strtoul(*av, NULL, 0) & 7) << 5);
4567                         av++;
4568                         break;
4569
4570                 case TOK_DSCP:
4571                         NEED1("missing DSCP code");
4572                         fill_dscp(cmd, *av, cblen);
4573                         av++;
4574                         break;
4575
4576                 case TOK_IPOPTS:
4577                         NEED1("missing argument for ipoptions");
4578                         fill_flags_cmd(cmd, O_IPOPT, f_ipopts, *av);
4579                         av++;
4580                         break;
4581
4582                 case TOK_IPTOS:
4583                         NEED1("missing argument for iptos");
4584                         fill_flags_cmd(cmd, O_IPTOS, f_iptos, *av);
4585                         av++;
4586                         break;
4587
4588                 case TOK_UID:
4589                         NEED1("uid requires argument");
4590                     {
4591                         char *end;
4592                         uid_t uid;
4593                         struct passwd *pwd;
4594
4595                         cmd->opcode = O_UID;
4596                         uid = strtoul(*av, &end, 0);
4597                         pwd = (*end == '\0') ? getpwuid(uid) : getpwnam(*av);
4598                         if (pwd == NULL)
4599                                 errx(EX_DATAERR, "uid \"%s\" nonexistent", *av);
4600                         cmd32->d[0] = pwd->pw_uid;
4601                         cmd->len |= F_INSN_SIZE(ipfw_insn_u32);
4602                         av++;
4603                     }
4604                         break;
4605
4606                 case TOK_GID:
4607                         NEED1("gid requires argument");
4608                     {
4609                         char *end;
4610                         gid_t gid;
4611                         struct group *grp;
4612
4613                         cmd->opcode = O_GID;
4614                         gid = strtoul(*av, &end, 0);
4615                         grp = (*end == '\0') ? getgrgid(gid) : getgrnam(*av);
4616                         if (grp == NULL)
4617                                 errx(EX_DATAERR, "gid \"%s\" nonexistent", *av);
4618                         cmd32->d[0] = grp->gr_gid;
4619                         cmd->len |= F_INSN_SIZE(ipfw_insn_u32);
4620                         av++;
4621                     }
4622                         break;
4623
4624                 case TOK_JAIL:
4625                         NEED1("jail requires argument");
4626                     {
4627                         int jid;
4628
4629                         cmd->opcode = O_JAIL;
4630                         jid = jail_getid(*av);
4631                         if (jid < 0)
4632                                 errx(EX_DATAERR, "%s", jail_errmsg);
4633                         cmd32->d[0] = (uint32_t)jid;
4634                         cmd->len |= F_INSN_SIZE(ipfw_insn_u32);
4635                         av++;
4636                     }
4637                         break;
4638
4639                 case TOK_ESTAB:
4640                         fill_cmd(cmd, O_ESTAB, 0, 0);
4641                         break;
4642
4643                 case TOK_SETUP:
4644                         fill_cmd(cmd, O_TCPFLAGS, 0,
4645                                 (TH_SYN) | ( (TH_ACK) & 0xff) <<8 );
4646                         break;
4647
4648                 case TOK_TCPDATALEN:
4649                         NEED1("tcpdatalen requires length");
4650                         if (strpbrk(*av, "-,")) {
4651                             if (!add_ports(cmd, *av, 0, O_TCPDATALEN, cblen))
4652                                 errx(EX_DATAERR, "invalid tcpdata len %s", *av);
4653                         } else
4654                             fill_cmd(cmd, O_TCPDATALEN, 0,
4655                                     strtoul(*av, NULL, 0));
4656                         av++;
4657                         break;
4658
4659                 case TOK_TCPOPTS:
4660                         NEED1("missing argument for tcpoptions");
4661                         fill_flags_cmd(cmd, O_TCPOPTS, f_tcpopts, *av);
4662                         av++;
4663                         break;
4664
4665                 case TOK_TCPSEQ:
4666                 case TOK_TCPACK:
4667                         NEED1("tcpseq/tcpack requires argument");
4668                         cmd->len = F_INSN_SIZE(ipfw_insn_u32);
4669                         cmd->opcode = (i == TOK_TCPSEQ) ? O_TCPSEQ : O_TCPACK;
4670                         cmd32->d[0] = htonl(strtoul(*av, NULL, 0));
4671                         av++;
4672                         break;
4673
4674                 case TOK_TCPWIN:
4675                         NEED1("tcpwin requires length");
4676                         if (strpbrk(*av, "-,")) {
4677                             if (!add_ports(cmd, *av, 0, O_TCPWIN, cblen))
4678                                 errx(EX_DATAERR, "invalid tcpwin len %s", *av);
4679                         } else
4680                             fill_cmd(cmd, O_TCPWIN, 0,
4681                                     strtoul(*av, NULL, 0));
4682                         av++;
4683                         break;
4684
4685                 case TOK_TCPFLAGS:
4686                         NEED1("missing argument for tcpflags");
4687                         cmd->opcode = O_TCPFLAGS;
4688                         fill_flags_cmd(cmd, O_TCPFLAGS, f_tcpflags, *av);
4689                         av++;
4690                         break;
4691
4692                 case TOK_KEEPSTATE:
4693                 case TOK_RECORDSTATE: {
4694                         uint16_t uidx;
4695
4696                         if (open_par)
4697                                 errx(EX_USAGE, "keep-state or record-state cannot be part "
4698                                     "of an or block");
4699                         if (have_state)
4700                                 errx(EX_USAGE, "only one of keep-state, record-state, "
4701                                         " limit and set-limit is allowed");
4702                         if (*av != NULL && *av[0] == ':') {
4703                                 if (state_check_name(*av + 1) != 0)
4704                                         errx(EX_DATAERR,
4705                                             "Invalid state name %s", *av);
4706                                 uidx = pack_object(tstate, *av + 1,
4707                                     IPFW_TLV_STATE_NAME);
4708                                 av++;
4709                         } else
4710                                 uidx = pack_object(tstate, default_state_name,
4711                                     IPFW_TLV_STATE_NAME);
4712                         have_state = cmd;
4713                         have_rstate = i == TOK_RECORDSTATE;
4714                         fill_cmd(cmd, O_KEEP_STATE, 0, uidx);
4715                         break;
4716                 }
4717
4718                 case TOK_LIMIT:
4719                 case TOK_SETLIMIT: {
4720                         ipfw_insn_limit *c = (ipfw_insn_limit *)cmd;
4721                         int val;
4722
4723                         if (open_par)
4724                                 errx(EX_USAGE,
4725                                     "limit or set-limit cannot be part of an or block");
4726                         if (have_state)
4727                                 errx(EX_USAGE, "only one of keep-state, record-state, "
4728                                         " limit and set-limit is allowed");
4729                         have_state = cmd;
4730                         have_rstate = i == TOK_SETLIMIT;
4731
4732                         cmd->len = F_INSN_SIZE(ipfw_insn_limit);
4733                         CHECK_CMDLEN;
4734                         cmd->opcode = O_LIMIT;
4735                         c->limit_mask = c->conn_limit = 0;
4736
4737                         while ( av[0] != NULL ) {
4738                                 if ((val = match_token(limit_masks, *av)) <= 0)
4739                                         break;
4740                                 c->limit_mask |= val;
4741                                 av++;
4742                         }
4743
4744                         if (c->limit_mask == 0)
4745                                 errx(EX_USAGE, "limit: missing limit mask");
4746
4747                         GET_UINT_ARG(c->conn_limit, IPFW_ARG_MIN, IPFW_ARG_MAX,
4748                             TOK_LIMIT, rule_options);
4749                         av++;
4750
4751                         if (*av != NULL && *av[0] == ':') {
4752                                 if (state_check_name(*av + 1) != 0)
4753                                         errx(EX_DATAERR,
4754                                             "Invalid state name %s", *av);
4755                                 cmd->arg1 = pack_object(tstate, *av + 1,
4756                                     IPFW_TLV_STATE_NAME);
4757                                 av++;
4758                         } else
4759                                 cmd->arg1 = pack_object(tstate,
4760                                     default_state_name, IPFW_TLV_STATE_NAME);
4761                         break;
4762                 }
4763
4764                 case TOK_PROTO:
4765                         NEED1("missing protocol");
4766                         if (add_proto(cmd, *av, &proto)) {
4767                                 av++;
4768                         } else
4769                                 errx(EX_DATAERR, "invalid protocol ``%s''",
4770                                     *av);
4771                         break;
4772
4773                 case TOK_SRCIP:
4774                         NEED1("missing source IP");
4775                         if (add_srcip(cmd, *av, cblen, tstate)) {
4776                                 av++;
4777                         }
4778                         break;
4779
4780                 case TOK_DSTIP:
4781                         NEED1("missing destination IP");
4782                         if (add_dstip(cmd, *av, cblen, tstate)) {
4783                                 av++;
4784                         }
4785                         break;
4786
4787                 case TOK_SRCIP6:
4788                         NEED1("missing source IP6");
4789                         if (add_srcip6(cmd, *av, cblen, tstate)) {
4790                                 av++;
4791                         }
4792                         break;
4793
4794                 case TOK_DSTIP6:
4795                         NEED1("missing destination IP6");
4796                         if (add_dstip6(cmd, *av, cblen, tstate)) {
4797                                 av++;
4798                         }
4799                         break;
4800
4801                 case TOK_SRCPORT:
4802                         NEED1("missing source port");
4803                         if (_substrcmp(*av, "any") == 0 ||
4804                             add_ports(cmd, *av, proto, O_IP_SRCPORT, cblen)) {
4805                                 av++;
4806                         } else
4807                                 errx(EX_DATAERR, "invalid source port %s", *av);
4808                         break;
4809
4810                 case TOK_DSTPORT:
4811                         NEED1("missing destination port");
4812                         if (_substrcmp(*av, "any") == 0 ||
4813                             add_ports(cmd, *av, proto, O_IP_DSTPORT, cblen)) {
4814                                 av++;
4815                         } else
4816                                 errx(EX_DATAERR, "invalid destination port %s",
4817                                     *av);
4818                         break;
4819
4820                 case TOK_MAC:
4821                         if (add_mac(cmd, av, cblen))
4822                                 av += 2;
4823                         break;
4824
4825                 case TOK_MACTYPE:
4826                         NEED1("missing mac type");
4827                         if (!add_mactype(cmd, *av, cblen))
4828                                 errx(EX_DATAERR, "invalid mac type %s", *av);
4829                         av++;
4830                         break;
4831
4832                 case TOK_VERREVPATH:
4833                         fill_cmd(cmd, O_VERREVPATH, 0, 0);
4834                         break;
4835
4836                 case TOK_VERSRCREACH:
4837                         fill_cmd(cmd, O_VERSRCREACH, 0, 0);
4838                         break;
4839
4840                 case TOK_ANTISPOOF:
4841                         fill_cmd(cmd, O_ANTISPOOF, 0, 0);
4842                         break;
4843
4844                 case TOK_IPSEC:
4845                         fill_cmd(cmd, O_IPSEC, 0, 0);
4846                         break;
4847
4848                 case TOK_IPV6:
4849                         fill_cmd(cmd, O_IP6, 0, 0);
4850                         break;
4851
4852                 case TOK_IPV4:
4853                         fill_cmd(cmd, O_IP4, 0, 0);
4854                         break;
4855
4856                 case TOK_EXT6HDR:
4857                         fill_ext6hdr( cmd, *av );
4858                         av++;
4859                         break;
4860
4861                 case TOK_FLOWID:
4862                         if (proto != IPPROTO_IPV6 )
4863                                 errx( EX_USAGE, "flow-id filter is active "
4864                                     "only for ipv6 protocol\n");
4865                         fill_flow6( (ipfw_insn_u32 *) cmd, *av, cblen);
4866                         av++;
4867                         break;
4868
4869                 case TOK_COMMENT:
4870                         fill_comment(cmd, av, cblen);
4871                         av[0]=NULL;
4872                         break;
4873
4874                 case TOK_TAGGED:
4875                         if (av[0] && strpbrk(*av, "-,")) {
4876                                 if (!add_ports(cmd, *av, 0, O_TAGGED, cblen))
4877                                         errx(EX_DATAERR, "tagged: invalid tag"
4878                                             " list: %s", *av);
4879                         }
4880                         else {
4881                                 uint16_t tag;
4882
4883                                 GET_UINT_ARG(tag, IPFW_ARG_MIN, IPFW_ARG_MAX,
4884                                     TOK_TAGGED, rule_options);
4885                                 fill_cmd(cmd, O_TAGGED, 0, tag);
4886                         }
4887                         av++;
4888                         break;
4889
4890                 case TOK_FIB:
4891                         NEED1("fib requires fib number");
4892                         fill_cmd(cmd, O_FIB, 0, strtoul(*av, NULL, 0));
4893                         av++;
4894                         break;
4895                 case TOK_SOCKARG:
4896                         fill_cmd(cmd, O_SOCKARG, 0, 0);
4897                         break;
4898
4899                 case TOK_LOOKUP: {
4900                         ipfw_insn_u32 *c = (ipfw_insn_u32 *)cmd;
4901                         int j;
4902
4903                         if (!av[0] || !av[1])
4904                                 errx(EX_USAGE, "format: lookup argument tablenum");
4905                         cmd->opcode = O_IP_DST_LOOKUP;
4906                         cmd->len |= F_INSN_SIZE(ipfw_insn) + 2;
4907                         i = match_token(rule_options, *av);
4908                         for (j = 0; lookup_key[j] >= 0 ; j++) {
4909                                 if (i == lookup_key[j])
4910                                         break;
4911                         }
4912                         if (lookup_key[j] <= 0)
4913                                 errx(EX_USAGE, "format: cannot lookup on %s", *av);
4914                         __PAST_END(c->d, 1) = j; // i converted to option
4915                         av++;
4916
4917                         if ((j = pack_table(tstate, *av)) == 0)
4918                                 errx(EX_DATAERR, "Invalid table name: %s", *av);
4919
4920                         cmd->arg1 = j;
4921                         av++;
4922                     }
4923                         break;
4924                 case TOK_FLOW:
4925                         NEED1("missing table name");
4926                         if (strncmp(*av, "table(", 6) != 0)
4927                                 errx(EX_DATAERR,
4928                                     "enclose table name into \"table()\"");
4929                         fill_table(cmd, *av, O_IP_FLOW_LOOKUP, tstate);
4930                         av++;
4931                         break;
4932
4933                 case TOK_SKIPACTION:
4934                         if (have_skipcmd)
4935                                 errx(EX_USAGE, "only one defer-action "
4936                                         "is allowed");
4937                         have_skipcmd = cmd;
4938                         fill_cmd(cmd, O_SKIP_ACTION, 0, 0);
4939                         break;
4940
4941                 default:
4942                         errx(EX_USAGE, "unrecognised option [%d] %s\n", i, s);
4943                 }
4944                 if (F_LEN(cmd) > 0) {   /* prepare to advance */
4945                         prev = cmd;
4946                         cmd = next_cmd(cmd, &cblen);
4947                 }
4948         }
4949
4950 done:
4951
4952         if (!have_state && have_skipcmd)
4953                 warnx("Rule contains \"defer-immediate-action\" "
4954                         "and doesn't contain any state-related options.");
4955
4956         /*
4957          * Now copy stuff into the rule.
4958          * If we have a keep-state option, the first instruction
4959          * must be a PROBE_STATE (which is generated here).
4960          * If we have a LOG option, it was stored as the first command,
4961          * and now must be moved to the top of the action part.
4962          */
4963         dst = (ipfw_insn *)rule->cmd;
4964
4965         /*
4966          * First thing to write into the command stream is the match probability.
4967          */
4968         if (match_prob != 1) { /* 1 means always match */
4969                 dst->opcode = O_PROB;
4970                 dst->len = 2;
4971                 *((int32_t *)(dst+1)) = (int32_t)(match_prob * 0x7fffffff);
4972                 dst += dst->len;
4973         }
4974
4975         /*
4976          * generate O_PROBE_STATE if necessary
4977          */
4978         if (have_state && have_state->opcode != O_CHECK_STATE && !have_rstate) {
4979                 fill_cmd(dst, O_PROBE_STATE, 0, have_state->arg1);
4980                 dst = next_cmd(dst, &rblen);
4981         }
4982
4983         /*
4984          * copy all commands but O_LOG, O_KEEP_STATE, O_LIMIT, O_ALTQ, O_TAG,
4985          * O_SKIP_ACTION
4986          */
4987         for (src = (ipfw_insn *)cmdbuf; src != cmd; src += i) {
4988                 i = F_LEN(src);
4989                 CHECK_RBUFLEN(i);
4990
4991                 switch (src->opcode) {
4992                 case O_LOG:
4993                 case O_KEEP_STATE:
4994                 case O_LIMIT:
4995                 case O_ALTQ:
4996                 case O_TAG:
4997                 case O_SKIP_ACTION:
4998                         break;
4999                 default:
5000                         bcopy(src, dst, i * sizeof(uint32_t));
5001                         dst += i;
5002                 }
5003         }
5004
5005         /*
5006          * put back the have_state command as last opcode
5007          */
5008         if (have_state && have_state->opcode != O_CHECK_STATE) {
5009                 i = F_LEN(have_state);
5010                 CHECK_RBUFLEN(i);
5011                 bcopy(have_state, dst, i * sizeof(uint32_t));
5012                 dst += i;
5013         }
5014
5015         /*
5016          * put back the have_skipcmd command as very last opcode
5017          */
5018         if (have_skipcmd) {
5019                 i = F_LEN(have_skipcmd);
5020                 CHECK_RBUFLEN(i);
5021                 bcopy(have_skipcmd, dst, i * sizeof(uint32_t));
5022                 dst += i;
5023         }
5024
5025         /*
5026          * start action section
5027          */
5028         rule->act_ofs = dst - rule->cmd;
5029
5030         /* put back O_LOG, O_ALTQ, O_TAG if necessary */
5031         if (have_log) {
5032                 i = F_LEN(have_log);
5033                 CHECK_RBUFLEN(i);
5034                 bcopy(have_log, dst, i * sizeof(uint32_t));
5035                 dst += i;
5036         }
5037         if (have_altq) {
5038                 i = F_LEN(have_altq);
5039                 CHECK_RBUFLEN(i);
5040                 bcopy(have_altq, dst, i * sizeof(uint32_t));
5041                 dst += i;
5042         }
5043         if (have_tag) {
5044                 i = F_LEN(have_tag);
5045                 CHECK_RBUFLEN(i);
5046                 bcopy(have_tag, dst, i * sizeof(uint32_t));
5047                 dst += i;
5048         }
5049
5050         /*
5051          * copy all other actions
5052          */
5053         for (src = (ipfw_insn *)actbuf; src != action; src += i) {
5054                 i = F_LEN(src);
5055                 CHECK_RBUFLEN(i);
5056                 bcopy(src, dst, i * sizeof(uint32_t));
5057                 dst += i;
5058         }
5059
5060         rule->cmd_len = (uint32_t *)dst - (uint32_t *)(rule->cmd);
5061         *rbufsize = (char *)dst - (char *)rule;
5062 }
5063
5064 static int
5065 compare_ntlv(const void *_a, const void *_b)
5066 {
5067         ipfw_obj_ntlv *a, *b;
5068
5069         a = (ipfw_obj_ntlv *)_a;
5070         b = (ipfw_obj_ntlv *)_b;
5071
5072         if (a->set < b->set)
5073                 return (-1);
5074         else if (a->set > b->set)
5075                 return (1);
5076
5077         if (a->idx < b->idx)
5078                 return (-1);
5079         else if (a->idx > b->idx)
5080                 return (1);
5081
5082         if (a->head.type < b->head.type)
5083                 return (-1);
5084         else if (a->head.type > b->head.type)
5085                 return (1);
5086
5087         return (0);
5088 }
5089
5090 /*
5091  * Provide kernel with sorted list of referenced objects
5092  */
5093 static void
5094 object_sort_ctlv(ipfw_obj_ctlv *ctlv)
5095 {
5096
5097         qsort(ctlv + 1, ctlv->count, ctlv->objsize, compare_ntlv);
5098 }
5099
5100 struct object_kt {
5101         uint16_t        uidx;
5102         uint16_t        type;
5103 };
5104 static int
5105 compare_object_kntlv(const void *k, const void *v)
5106 {
5107         ipfw_obj_ntlv *ntlv;
5108         struct object_kt key;
5109
5110         key = *((struct object_kt *)k);
5111         ntlv = (ipfw_obj_ntlv *)v;
5112
5113         if (key.uidx < ntlv->idx)
5114                 return (-1);
5115         else if (key.uidx > ntlv->idx)
5116                 return (1);
5117
5118         if (key.type < ntlv->head.type)
5119                 return (-1);
5120         else if (key.type > ntlv->head.type)
5121                 return (1);
5122
5123         return (0);
5124 }
5125
5126 /*
5127  * Finds object name in @ctlv by @idx and @type.
5128  * Uses the following facts:
5129  * 1) All TLVs are the same size
5130  * 2) Kernel implementation provides already sorted list.
5131  *
5132  * Returns table name or NULL.
5133  */
5134 static char *
5135 object_search_ctlv(ipfw_obj_ctlv *ctlv, uint16_t idx, uint16_t type)
5136 {
5137         ipfw_obj_ntlv *ntlv;
5138         struct object_kt key;
5139
5140         key.uidx = idx;
5141         key.type = type;
5142
5143         ntlv = bsearch(&key, (ctlv + 1), ctlv->count, ctlv->objsize,
5144             compare_object_kntlv);
5145
5146         if (ntlv != NULL)
5147                 return (ntlv->name);
5148
5149         return (NULL);
5150 }
5151
5152 static char *
5153 table_search_ctlv(ipfw_obj_ctlv *ctlv, uint16_t idx)
5154 {
5155
5156         return (object_search_ctlv(ctlv, idx, IPFW_TLV_TBL_NAME));
5157 }
5158
5159 /*
5160  * Adds one or more rules to ipfw chain.
5161  * Data layout:
5162  * Request:
5163  * [
5164  *   ip_fw3_opheader
5165  *   [ ipfw_obj_ctlv(IPFW_TLV_TBL_LIST) ipfw_obj_ntlv x N ] (optional *1)
5166  *   [ ipfw_obj_ctlv(IPFW_TLV_RULE_LIST) [ ip_fw_rule ip_fw_insn ] x N ] (*2) (*3)
5167  * ]
5168  * Reply:
5169  * [
5170  *   ip_fw3_opheader
5171  *   [ ipfw_obj_ctlv(IPFW_TLV_TBL_LIST) ipfw_obj_ntlv x N ] (optional)
5172  *   [ ipfw_obj_ctlv(IPFW_TLV_RULE_LIST) [ ip_fw_rule ip_fw_insn ] x N ]
5173  * ]
5174  *
5175  * Rules in reply are modified to store their actual ruleset number.
5176  *
5177  * (*1) TLVs inside IPFW_TLV_TBL_LIST needs to be sorted ascending
5178  * according to their idx field and there has to be no duplicates.
5179  * (*2) Numbered rules inside IPFW_TLV_RULE_LIST needs to be sorted ascending.
5180  * (*3) Each ip_fw structure needs to be aligned to u64 boundary.
5181  */
5182 void
5183 ipfw_add(char *av[])
5184 {
5185         uint32_t rulebuf[1024];
5186         int rbufsize, default_off, tlen, rlen;
5187         size_t sz;
5188         struct tidx ts;
5189         struct ip_fw_rule *rule;
5190         caddr_t tbuf;
5191         ip_fw3_opheader *op3;
5192         ipfw_obj_ctlv *ctlv, *tstate;
5193
5194         rbufsize = sizeof(rulebuf);
5195         memset(rulebuf, 0, rbufsize);
5196         memset(&ts, 0, sizeof(ts));
5197
5198         /* Optimize case with no tables */
5199         default_off = sizeof(ipfw_obj_ctlv) + sizeof(ip_fw3_opheader);
5200         op3 = (ip_fw3_opheader *)rulebuf;
5201         ctlv = (ipfw_obj_ctlv *)(op3 + 1);
5202         rule = (struct ip_fw_rule *)(ctlv + 1);
5203         rbufsize -= default_off;
5204
5205         compile_rule(av, (uint32_t *)rule, &rbufsize, &ts);
5206         /* Align rule size to u64 boundary */
5207         rlen = roundup2(rbufsize, sizeof(uint64_t));
5208
5209         tbuf = NULL;
5210         sz = 0;
5211         tstate = NULL;
5212         if (ts.count != 0) {
5213                 /* Some tables. We have to alloc more data */
5214                 tlen = ts.count * sizeof(ipfw_obj_ntlv);
5215                 sz = default_off + sizeof(ipfw_obj_ctlv) + tlen + rlen;
5216
5217                 if ((tbuf = calloc(1, sz)) == NULL)
5218                         err(EX_UNAVAILABLE, "malloc() failed for IP_FW_ADD");
5219                 op3 = (ip_fw3_opheader *)tbuf;
5220                 /* Tables first */
5221                 ctlv = (ipfw_obj_ctlv *)(op3 + 1);
5222                 ctlv->head.type = IPFW_TLV_TBLNAME_LIST;
5223                 ctlv->head.length = sizeof(ipfw_obj_ctlv) + tlen;
5224                 ctlv->count = ts.count;
5225                 ctlv->objsize = sizeof(ipfw_obj_ntlv);
5226                 memcpy(ctlv + 1, ts.idx, tlen);
5227                 object_sort_ctlv(ctlv);
5228                 tstate = ctlv;
5229                 /* Rule next */
5230                 ctlv = (ipfw_obj_ctlv *)((caddr_t)ctlv + ctlv->head.length);
5231                 ctlv->head.type = IPFW_TLV_RULE_LIST;
5232                 ctlv->head.length = sizeof(ipfw_obj_ctlv) + rlen;
5233                 ctlv->count = 1;
5234                 memcpy(ctlv + 1, rule, rbufsize);
5235         } else {
5236                 /* Simply add header */
5237                 sz = rlen + default_off;
5238                 memset(ctlv, 0, sizeof(*ctlv));
5239                 ctlv->head.type = IPFW_TLV_RULE_LIST;
5240                 ctlv->head.length = sizeof(ipfw_obj_ctlv) + rlen;
5241                 ctlv->count = 1;
5242         }
5243
5244         if (do_get3(IP_FW_XADD, op3, &sz) != 0)
5245                 err(EX_UNAVAILABLE, "getsockopt(%s)", "IP_FW_XADD");
5246
5247         if (!co.do_quiet) {
5248                 struct format_opts sfo;
5249                 struct buf_pr bp;
5250                 memset(&sfo, 0, sizeof(sfo));
5251                 sfo.tstate = tstate;
5252                 sfo.set_mask = (uint32_t)(-1);
5253                 bp_alloc(&bp, 4096);
5254                 show_static_rule(&co, &sfo, &bp, rule, NULL);
5255                 printf("%s", bp.buf);
5256                 bp_free(&bp);
5257         }
5258
5259         if (tbuf != NULL)
5260                 free(tbuf);
5261
5262         if (ts.idx != NULL)
5263                 free(ts.idx);
5264 }
5265
5266 /*
5267  * clear the counters or the log counters.
5268  * optname has the following values:
5269  *  0 (zero both counters and logging)
5270  *  1 (zero logging only)
5271  */
5272 void
5273 ipfw_zero(int ac, char *av[], int optname)
5274 {
5275         ipfw_range_tlv rt;
5276         char const *errstr;
5277         char const *name = optname ? "RESETLOG" : "ZERO";
5278         uint32_t arg;
5279         int failed = EX_OK;
5280
5281         optname = optname ? IP_FW_XRESETLOG : IP_FW_XZERO;
5282         av++; ac--;
5283
5284         if (ac == 0) {
5285                 /* clear all entries */
5286                 memset(&rt, 0, sizeof(rt));
5287                 rt.flags = IPFW_RCFLAG_ALL;
5288                 if (do_range_cmd(optname, &rt) < 0)
5289                         err(EX_UNAVAILABLE, "setsockopt(IP_FW_X%s)", name);
5290                 if (!co.do_quiet)
5291                         printf("%s.\n", optname == IP_FW_XZERO ?
5292                             "Accounting cleared":"Logging counts reset");
5293
5294                 return;
5295         }
5296
5297         while (ac) {
5298                 /* Rule number */
5299                 if (isdigit(**av)) {
5300                         arg = strtonum(*av, 0, 0xffff, &errstr);
5301                         if (errstr)
5302                                 errx(EX_DATAERR,
5303                                     "invalid rule number %s\n", *av);
5304                         memset(&rt, 0, sizeof(rt));
5305                         rt.start_rule = arg;
5306                         rt.end_rule = arg;
5307                         rt.flags |= IPFW_RCFLAG_RANGE;
5308                         if (co.use_set != 0) {
5309                                 rt.set = co.use_set - 1;
5310                                 rt.flags |= IPFW_RCFLAG_SET;
5311                         }
5312                         if (do_range_cmd(optname, &rt) != 0) {
5313                                 warn("rule %u: setsockopt(IP_FW_X%s)",
5314                                     arg, name);
5315                                 failed = EX_UNAVAILABLE;
5316                         } else if (rt.new_set == 0) {
5317                                 printf("Entry %d not found\n", arg);
5318                                 failed = EX_UNAVAILABLE;
5319                         } else if (!co.do_quiet)
5320                                 printf("Entry %d %s.\n", arg,
5321                                     optname == IP_FW_XZERO ?
5322                                         "cleared" : "logging count reset");
5323                 } else {
5324                         errx(EX_USAGE, "invalid rule number ``%s''", *av);
5325                 }
5326                 av++; ac--;
5327         }
5328         if (failed != EX_OK)
5329                 exit(failed);
5330 }
5331
5332 void
5333 ipfw_flush(int force)
5334 {
5335         ipfw_range_tlv rt;
5336
5337         if (!force && !co.do_quiet) { /* need to ask user */
5338                 int c;
5339
5340                 printf("Are you sure? [yn] ");
5341                 fflush(stdout);
5342                 do {
5343                         c = toupper(getc(stdin));
5344                         while (c != '\n' && getc(stdin) != '\n')
5345                                 if (feof(stdin))
5346                                         return; /* and do not flush */
5347                 } while (c != 'Y' && c != 'N');
5348                 printf("\n");
5349                 if (c == 'N')   /* user said no */
5350                         return;
5351         }
5352         if (co.do_pipe) {
5353                 dummynet_flush();
5354                 return;
5355         }
5356         /* `ipfw set N flush` - is the same that `ipfw delete set N` */
5357         memset(&rt, 0, sizeof(rt));
5358         if (co.use_set != 0) {
5359                 rt.set = co.use_set - 1;
5360                 rt.flags = IPFW_RCFLAG_SET;
5361         } else
5362                 rt.flags = IPFW_RCFLAG_ALL;
5363         if (do_range_cmd(IP_FW_XDEL, &rt) != 0)
5364                         err(EX_UNAVAILABLE, "setsockopt(IP_FW_XDEL)");
5365         if (!co.do_quiet)
5366                 printf("Flushed all %s.\n", co.do_pipe ? "pipes" : "rules");
5367 }
5368
5369 static struct _s_x intcmds[] = {
5370       { "talist",       TOK_TALIST },
5371       { "iflist",       TOK_IFLIST },
5372       { "olist",        TOK_OLIST },
5373       { "vlist",        TOK_VLIST },
5374       { NULL, 0 }
5375 };
5376
5377 static struct _s_x otypes[] = {
5378         { "EACTION",    IPFW_TLV_EACTION },
5379         { "DYNSTATE",   IPFW_TLV_STATE_NAME },
5380         { NULL, 0 }
5381 };
5382
5383 static const char*
5384 lookup_eaction_name(ipfw_obj_ntlv *ntlv, int cnt, uint16_t type)
5385 {
5386         const char *name;
5387         int i;
5388
5389         name = NULL;
5390         for (i = 0; i < cnt; i++) {
5391                 if (ntlv[i].head.type != IPFW_TLV_EACTION)
5392                         continue;
5393                 if (IPFW_TLV_EACTION_NAME(ntlv[i].idx) != type)
5394                         continue;
5395                 name = ntlv[i].name;
5396                 break;
5397         }
5398         return (name);
5399 }
5400
5401 static void
5402 ipfw_list_objects(int ac, char *av[])
5403 {
5404         ipfw_obj_lheader req, *olh;
5405         ipfw_obj_ntlv *ntlv;
5406         const char *name;
5407         size_t sz;
5408         int i;
5409
5410         memset(&req, 0, sizeof(req));
5411         sz = sizeof(req);
5412         if (do_get3(IP_FW_DUMP_SRVOBJECTS, &req.opheader, &sz) != 0)
5413                 if (errno != ENOMEM)
5414                         return;
5415
5416         sz = req.size;
5417         if ((olh = calloc(1, sz)) == NULL)
5418                 return;
5419
5420         olh->size = sz;
5421         if (do_get3(IP_FW_DUMP_SRVOBJECTS, &olh->opheader, &sz) != 0) {
5422                 free(olh);
5423                 return;
5424         }
5425
5426         if (olh->count > 0)
5427                 printf("Objects list:\n");
5428         else
5429                 printf("There are no objects\n");
5430         ntlv = (ipfw_obj_ntlv *)(olh + 1);
5431         for (i = 0; i < olh->count; i++) {
5432                 name = match_value(otypes, ntlv->head.type);
5433                 if (name == NULL)
5434                         name = lookup_eaction_name(
5435                             (ipfw_obj_ntlv *)(olh + 1), olh->count,
5436                             ntlv->head.type);
5437                 if (name == NULL)
5438                         printf(" kidx: %4d\ttype: %10d\tname: %s\n",
5439                             ntlv->idx, ntlv->head.type, ntlv->name);
5440                 else
5441                         printf(" kidx: %4d\ttype: %10s\tname: %s\n",
5442                             ntlv->idx, name, ntlv->name);
5443                 ntlv++;
5444         }
5445         free(olh);
5446 }
5447
5448 void
5449 ipfw_internal_handler(int ac, char *av[])
5450 {
5451         int tcmd;
5452
5453         ac--; av++;
5454         NEED1("internal cmd required");
5455
5456         if ((tcmd = match_token(intcmds, *av)) == -1)
5457                 errx(EX_USAGE, "invalid internal sub-cmd: %s", *av);
5458
5459         switch (tcmd) {
5460         case TOK_IFLIST:
5461                 ipfw_list_tifaces();
5462                 break;
5463         case TOK_TALIST:
5464                 ipfw_list_ta(ac, av);
5465                 break;
5466         case TOK_OLIST:
5467                 ipfw_list_objects(ac, av);
5468                 break;
5469         case TOK_VLIST:
5470                 ipfw_list_values(ac, av);
5471                 break;
5472         }
5473 }
5474
5475 static int
5476 ipfw_get_tracked_ifaces(ipfw_obj_lheader **polh)
5477 {
5478         ipfw_obj_lheader req, *olh;
5479         size_t sz;
5480
5481         memset(&req, 0, sizeof(req));
5482         sz = sizeof(req);
5483
5484         if (do_get3(IP_FW_XIFLIST, &req.opheader, &sz) != 0) {
5485                 if (errno != ENOMEM)
5486                         return (errno);
5487         }
5488
5489         sz = req.size;
5490         if ((olh = calloc(1, sz)) == NULL)
5491                 return (ENOMEM);
5492
5493         olh->size = sz;
5494         if (do_get3(IP_FW_XIFLIST, &olh->opheader, &sz) != 0) {
5495                 free(olh);
5496                 return (errno);
5497         }
5498
5499         *polh = olh;
5500         return (0);
5501 }
5502
5503 static int
5504 ifinfo_cmp(const void *a, const void *b)
5505 {
5506         ipfw_iface_info *ia, *ib;
5507
5508         ia = (ipfw_iface_info *)a;
5509         ib = (ipfw_iface_info *)b;
5510
5511         return (stringnum_cmp(ia->ifname, ib->ifname));
5512 }
5513
5514 /*
5515  * Retrieves table list from kernel,
5516  * optionally sorts it and calls requested function for each table.
5517  * Returns 0 on success.
5518  */
5519 static void
5520 ipfw_list_tifaces()
5521 {
5522         ipfw_obj_lheader *olh;
5523         ipfw_iface_info *info;
5524         int i, error;
5525
5526         if ((error = ipfw_get_tracked_ifaces(&olh)) != 0)
5527                 err(EX_OSERR, "Unable to request ipfw tracked interface list");
5528
5529
5530         qsort(olh + 1, olh->count, olh->objsize, ifinfo_cmp);
5531
5532         info = (ipfw_iface_info *)(olh + 1);
5533         for (i = 0; i < olh->count; i++) {
5534                 if (info->flags & IPFW_IFFLAG_RESOLVED)
5535                         printf("%s ifindex: %d refcount: %u changes: %u\n",
5536                             info->ifname, info->ifindex, info->refcnt,
5537                             info->gencnt);
5538                 else
5539                         printf("%s ifindex: unresolved refcount: %u changes: %u\n",
5540                             info->ifname, info->refcnt, info->gencnt);
5541                 info = (ipfw_iface_info *)((caddr_t)info + olh->objsize);
5542         }
5543
5544         free(olh);
5545 }
5546
5547
5548
5549