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 == '\\') ; s1++)
 944                 if (*s1 == '\\' && s1[1] != '\0')
 945                         s1++;
 946
 947         buf = safe_calloc(s1 - s + 1, 1);
 948
 949         /*
 950          * copy into a buffer skipping backslashes
 951          */
 952         for (p = s, i = 0; p != s1 ; p++)
 953                 if (*p != '\\')
 954                         buf[i++] = *p;
 955         buf[i++] = '\0';
 956
 957         if (proto == IPPROTO_ETHERTYPE) {
 958                 i = match_token(ether_types, buf);
 959                 free(buf);
 960                 if (i != -1) {  /* found */
 961                         *end = s1;
 962                         return i;
 963                 }
 964         } else {
 965                 struct protoent *pe = NULL;
 966                 struct servent *se;
 967
 968                 if (proto != 0)
 969                         pe = getprotobynumber(proto);
 970                 setservent(1);
 971                 se = getservbyname(buf, pe ? pe->p_name : NULL);
 972                 free(buf);
 973                 if (se != NULL) {
 974                         *end = s1;
 975                         return ntohs(se->s_port);
 976                 }
 977         }
 978         return 0;       /* not found */
 979 }
 980
 981 /*
 982  * Fill the body of the command with the list of port ranges.
 983  */
 984 static int
 985 fill_newports(ipfw_insn_u16 *cmd, char *av, int proto, int cblen)
 986 {
 987         uint16_t a, b, *p = cmd->ports;
 988         int i = 0;
 989         char *s = av;
 990
 991         while (*s) {
 992                 a = strtoport(av, &s, 0, proto);
 993                 if (s == av)                    /* empty or invalid argument */
 994                         return (0);
 995
 996                 CHECK_LENGTH(cblen, i + 2);
 997
 998                 switch (*s) {
 999                 case '-':                       /* a range */
1000                         av = s + 1;
1001                         b = strtoport(av, &s, 0, proto);
1002                         /* Reject expressions like '1-abc' or '1-2-3'. */
1003                         if (s == av || (*s != ',' && *s != '\0'))
1004                                 return (0);
1005                         p[0] = a;
1006                         p[1] = b;
1007                         break;
1008                 case ',':                       /* comma separated list */
1009                 case '\0':
1010                         p[0] = p[1] = a;
1011                         break;
1012                 default:
1013                         warnx("port list: invalid separator <%c> in <%s>",
1014                                 *s, av);
1015                         return (0);
1016                 }
1017
1018                 i++;
1019                 p += 2;
1020                 av = s + 1;
1021         }
1022         if (i > 0) {
1023                 if (i + 1 > F_LEN_MASK)
1024                         errx(EX_DATAERR, "too many ports/ranges\n");
1025                 cmd->o.len |= i + 1;    /* leave F_NOT and F_OR untouched */
1026         }
1027         return (i);
1028 }
1029
1030 /*
1031  * Fill the body of the command with the list of DiffServ codepoints.
1032  */
1033 static void
1034 fill_dscp(ipfw_insn *cmd, char *av, int cblen)
1035 {
1036         uint32_t *low, *high;
1037         char *s = av, *a;
1038         int code;
1039
1040         cmd->opcode = O_DSCP;
1041         cmd->len |= F_INSN_SIZE(ipfw_insn_u32) + 1;
1042
1043         CHECK_CMDLEN;
1044
1045         low = (uint32_t *)(cmd + 1);
1046         high = low + 1;
1047
1048         *low = 0;
1049         *high = 0;
1050
1051         while (s != NULL) {
1052                 a = strchr(s, ',');
1053
1054                 if (a != NULL)
1055                         *a++ = '\0';
1056
1057                 if (isalpha(*s)) {
1058                         if ((code = match_token(f_ipdscp, s)) == -1)
1059                                 errx(EX_DATAERR, "Unknown DSCP code");
1060                 } else {
1061                         code = strtoul(s, NULL, 10);
1062                         if (code < 0 || code > 63)
1063                                 errx(EX_DATAERR, "Invalid DSCP value");
1064                 }
1065
1066                 if (code >= 32)
1067                         *high |= 1 << (code - 32);
1068                 else
1069                         *low |= 1 << code;
1070
1071                 s = a;
1072         }
1073 }
1074
1075 static struct _s_x icmpcodes[] = {
1076       { "net",                  ICMP_UNREACH_NET },
1077       { "host",                 ICMP_UNREACH_HOST },
1078       { "protocol",             ICMP_UNREACH_PROTOCOL },
1079       { "port",                 ICMP_UNREACH_PORT },
1080       { "needfrag",             ICMP_UNREACH_NEEDFRAG },
1081       { "srcfail",              ICMP_UNREACH_SRCFAIL },
1082       { "net-unknown",          ICMP_UNREACH_NET_UNKNOWN },
1083       { "host-unknown",         ICMP_UNREACH_HOST_UNKNOWN },
1084       { "isolated",             ICMP_UNREACH_ISOLATED },
1085       { "net-prohib",           ICMP_UNREACH_NET_PROHIB },
1086       { "host-prohib",          ICMP_UNREACH_HOST_PROHIB },
1087       { "tosnet",               ICMP_UNREACH_TOSNET },
1088       { "toshost",              ICMP_UNREACH_TOSHOST },
1089       { "filter-prohib",        ICMP_UNREACH_FILTER_PROHIB },
1090       { "host-precedence",      ICMP_UNREACH_HOST_PRECEDENCE },
1091       { "precedence-cutoff",    ICMP_UNREACH_PRECEDENCE_CUTOFF },
1092       { NULL, 0 }
1093 };
1094
1095 static void
1096 fill_reject_code(u_short *codep, char *str)
1097 {
1098         int val;
1099         char *s;
1100
1101         val = strtoul(str, &s, 0);
1102         if (s == str || *s != '\0' || val >= 0x100)
1103                 val = match_token(icmpcodes, str);
1104         if (val < 0)
1105                 errx(EX_DATAERR, "unknown ICMP unreachable code ``%s''", str);
1106         *codep = val;
1107         return;
1108 }
1109
1110 static void
1111 print_reject_code(struct buf_pr *bp, uint16_t code)
1112 {
1113         char const *s;
1114
1115         if ((s = match_value(icmpcodes, code)) != NULL)
1116                 bprintf(bp, "unreach %s", s);
1117         else
1118                 bprintf(bp, "unreach %u", code);
1119 }
1120
1121 /*
1122  * Returns the number of bits set (from left) in a contiguous bitmask,
1123  * or -1 if the mask is not contiguous.
1124  * XXX this needs a proper fix.
1125  * This effectively works on masks in big-endian (network) format.
1126  * when compiled on little endian architectures.
1127  *
1128  * First bit is bit 7 of the first byte -- note, for MAC addresses,
1129  * the first bit on the wire is bit 0 of the first byte.
1130  * len is the max length in bits.
1131  */
1132 int
1133 contigmask(uint8_t *p, int len)
1134 {
1135         int i, n;
1136
1137         for (i=0; i<len ; i++)
1138                 if ( (p[i/8] & (1 << (7 - (i%8)))) == 0) /* first bit unset */
1139                         break;
1140         for (n=i+1; n < len; n++)
1141                 if ( (p[n/8] & (1 << (7 - (n%8)))) != 0)
1142                         return -1; /* mask not contiguous */
1143         return i;
1144 }
1145
1146 /*
1147  * print flags set/clear in the two bitmasks passed as parameters.
1148  * There is a specialized check for f_tcpflags.
1149  */
1150 static void
1151 print_flags(struct buf_pr *bp, char const *name, ipfw_insn *cmd,
1152     struct _s_x *list)
1153 {
1154         char const *comma = "";
1155         int i;
1156         uint8_t set = cmd->arg1 & 0xff;
1157         uint8_t clear = (cmd->arg1 >> 8) & 0xff;
1158
1159         if (list == f_tcpflags && set == TH_SYN && clear == TH_ACK) {
1160                 bprintf(bp, " setup");
1161                 return;
1162         }
1163
1164         bprintf(bp, " %s ", name);
1165         for (i=0; list[i].x != 0; i++) {
1166                 if (set & list[i].x) {
1167                         set &= ~list[i].x;
1168                         bprintf(bp, "%s%s", comma, list[i].s);
1169                         comma = ",";
1170                 }
1171                 if (clear & list[i].x) {
1172                         clear &= ~list[i].x;
1173                         bprintf(bp, "%s!%s", comma, list[i].s);
1174                         comma = ",";
1175                 }
1176         }
1177 }
1178
1179
1180 /*
1181  * Print the ip address contained in a command.
1182  */
1183 static void
1184 print_ip(struct buf_pr *bp, const struct format_opts *fo, ipfw_insn_ip *cmd)
1185 {
1186         struct hostent *he = NULL;
1187         struct in_addr *ia;
1188         uint32_t len = F_LEN((ipfw_insn *)cmd);
1189         uint32_t *a = ((ipfw_insn_u32 *)cmd)->d;
1190         char *t;
1191
1192         bprintf(bp, " ");
1193         if (cmd->o.opcode == O_IP_DST_LOOKUP && len > F_INSN_SIZE(ipfw_insn_u32)) {
1194                 uint32_t d = a[1];
1195                 const char *arg = "<invalid>";
1196
1197                 if (d < sizeof(lookup_key)/sizeof(lookup_key[0]))
1198                         arg = match_value(rule_options, lookup_key[d]);
1199                 t = table_search_ctlv(fo->tstate, ((ipfw_insn *)cmd)->arg1);
1200                 bprintf(bp, "lookup %s %s", arg, t);
1201                 return;
1202         }
1203         if (cmd->o.opcode == O_IP_SRC_ME || cmd->o.opcode == O_IP_DST_ME) {
1204                 bprintf(bp, "me");
1205                 return;
1206         }
1207         if (cmd->o.opcode == O_IP_SRC_LOOKUP ||
1208             cmd->o.opcode == O_IP_DST_LOOKUP) {
1209                 t = table_search_ctlv(fo->tstate, ((ipfw_insn *)cmd)->arg1);
1210                 bprintf(bp, "table(%s", t);
1211                 if (len == F_INSN_SIZE(ipfw_insn_u32))
1212                         bprintf(bp, ",%u", *a);
1213                 bprintf(bp, ")");
1214                 return;
1215         }
1216         if (cmd->o.opcode == O_IP_SRC_SET || cmd->o.opcode == O_IP_DST_SET) {
1217                 uint32_t x, *map = (uint32_t *)&(cmd->mask);
1218                 int i, j;
1219                 char comma = '{';
1220
1221                 x = cmd->o.arg1 - 1;
1222                 x = htonl( ~x );
1223                 cmd->addr.s_addr = htonl(cmd->addr.s_addr);
1224                 bprintf(bp, "%s/%d", inet_ntoa(cmd->addr),
1225                         contigmask((uint8_t *)&x, 32));
1226                 x = cmd->addr.s_addr = htonl(cmd->addr.s_addr);
1227                 x &= 0xff; /* base */
1228                 /*
1229                  * Print bits and ranges.
1230                  * Locate first bit set (i), then locate first bit unset (j).
1231                  * If we have 3+ consecutive bits set, then print them as a
1232                  * range, otherwise only print the initial bit and rescan.
1233                  */
1234                 for (i=0; i < cmd->o.arg1; i++)
1235                         if (map[i/32] & (1<<(i & 31))) {
1236                                 for (j=i+1; j < cmd->o.arg1; j++)
1237                                         if (!(map[ j/32] & (1<<(j & 31))))
1238                                                 break;
1239                                 bprintf(bp, "%c%d", comma, i+x);
1240                                 if (j>i+2) { /* range has at least 3 elements */
1241                                         bprintf(bp, "-%d", j-1+x);
1242                                         i = j-1;
1243                                 }
1244                                 comma = ',';
1245                         }
1246                 bprintf(bp, "}");
1247                 return;
1248         }
1249         /*
1250          * len == 2 indicates a single IP, whereas lists of 1 or more
1251          * addr/mask pairs have len = (2n+1). We convert len to n so we
1252          * use that to count the number of entries.
1253          */
1254     for (len = len / 2; len > 0; len--, a += 2) {
1255         int mb =        /* mask length */
1256             (cmd->o.opcode == O_IP_SRC || cmd->o.opcode == O_IP_DST) ?
1257                 32 : contigmask((uint8_t *)&(a[1]), 32);
1258         if (mb == 32 && co.do_resolv)
1259                 he = gethostbyaddr((char *)&(a[0]), sizeof(u_long), AF_INET);
1260         if (he != NULL)         /* resolved to name */
1261                 bprintf(bp, "%s", he->h_name);
1262         else if (mb == 0)       /* any */
1263                 bprintf(bp, "any");
1264         else {          /* numeric IP followed by some kind of mask */
1265                 ia = (struct in_addr *)&a[0];
1266                 bprintf(bp, "%s", inet_ntoa(*ia));
1267                 if (mb < 0) {
1268                         ia = (struct in_addr *)&a[1];
1269                         bprintf(bp, ":%s", inet_ntoa(*ia));
1270                 } else if (mb < 32)
1271                         bprintf(bp, "/%d", mb);
1272         }
1273         if (len > 1)
1274                 bprintf(bp, ",");
1275     }
1276 }
1277
1278 /*
1279  * prints a MAC address/mask pair
1280  */
1281 static void
1282 format_mac(struct buf_pr *bp, uint8_t *addr, uint8_t *mask)
1283 {
1284         int l = contigmask(mask, 48);
1285
1286         if (l == 0)
1287                 bprintf(bp, " any");
1288         else {
1289                 bprintf(bp, " %02x:%02x:%02x:%02x:%02x:%02x",
1290                     addr[0], addr[1], addr[2], addr[3], addr[4], addr[5]);
1291                 if (l == -1)
1292                         bprintf(bp, "&%02x:%02x:%02x:%02x:%02x:%02x",
1293                             mask[0], mask[1], mask[2],
1294                             mask[3], mask[4], mask[5]);
1295                 else if (l < 48)
1296                         bprintf(bp, "/%d", l);
1297         }
1298 }
1299
1300 static void
1301 print_mac(struct buf_pr *bp, ipfw_insn_mac *mac)
1302 {
1303
1304         bprintf(bp, " MAC");
1305         format_mac(bp, mac->addr, mac->mask);
1306         format_mac(bp, mac->addr + 6, mac->mask + 6);
1307 }
1308
1309 static void
1310 fill_icmptypes(ipfw_insn_u32 *cmd, char *av)
1311 {
1312         uint8_t type;
1313
1314         cmd->d[0] = 0;
1315         while (*av) {
1316                 if (*av == ',')
1317                         av++;
1318
1319                 type = strtoul(av, &av, 0);
1320
1321                 if (*av != ',' && *av != '\0')
1322                         errx(EX_DATAERR, "invalid ICMP type");
1323
1324                 if (type > 31)
1325                         errx(EX_DATAERR, "ICMP type out of range");
1326
1327                 cmd->d[0] |= 1 << type;
1328         }
1329         cmd->o.opcode = O_ICMPTYPE;
1330         cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32);
1331 }
1332
1333 static void
1334 print_icmptypes(struct buf_pr *bp, ipfw_insn_u32 *cmd)
1335 {
1336         int i;
1337         char sep= ' ';
1338
1339         bprintf(bp, " icmptypes");
1340         for (i = 0; i < 32; i++) {
1341                 if ( (cmd->d[0] & (1 << (i))) == 0)
1342                         continue;
1343                 bprintf(bp, "%c%d", sep, i);
1344                 sep = ',';
1345         }
1346 }
1347
1348 static void
1349 print_dscp(struct buf_pr *bp, ipfw_insn_u32 *cmd)
1350 {
1351         int i = 0;
1352         uint32_t *v;
1353         char sep= ' ';
1354         const char *code;
1355
1356         bprintf(bp, " dscp");
1357         v = cmd->d;
1358         while (i < 64) {
1359                 if (*v & (1 << i)) {
1360                         if ((code = match_value(f_ipdscp, i)) != NULL)
1361                                 bprintf(bp, "%c%s", sep, code);
1362                         else
1363                                 bprintf(bp, "%c%d", sep, i);
1364                         sep = ',';
1365                 }
1366
1367                 if ((++i % 32) == 0)
1368                         v++;
1369         }
1370 }
1371
1372 #define insntod(cmd, type)      ((ipfw_insn_ ## type *)(cmd))
1373 struct show_state {
1374         struct ip_fw_rule       *rule;
1375         const ipfw_insn         *eaction;
1376         uint8_t                 *printed;
1377         int                     flags;
1378 #define HAVE_PROTO              0x0001
1379 #define HAVE_SRCIP              0x0002
1380 #define HAVE_DSTIP              0x0004
1381 #define HAVE_PROBE_STATE        0x0008
1382         int                     proto;
1383         int                     or_block;
1384 };
1385
1386 static int
1387 init_show_state(struct show_state *state, struct ip_fw_rule *rule)
1388 {
1389
1390         state->printed = calloc(rule->cmd_len, sizeof(uint8_t));
1391         if (state->printed == NULL)
1392                 return (ENOMEM);
1393         state->rule = rule;
1394         state->eaction = NULL;
1395         state->flags = 0;
1396         state->proto = 0;
1397         state->or_block = 0;
1398         return (0);
1399 }
1400
1401 static void
1402 free_show_state(struct show_state *state)
1403 {
1404
1405         free(state->printed);
1406 }
1407
1408 static uint8_t
1409 is_printed_opcode(struct show_state *state, const ipfw_insn *cmd)
1410 {
1411
1412         return (state->printed[cmd - state->rule->cmd]);
1413 }
1414
1415 static void
1416 mark_printed(struct show_state *state, const ipfw_insn *cmd)
1417 {
1418
1419         state->printed[cmd - state->rule->cmd] = 1;
1420 }
1421
1422 static void
1423 print_limit_mask(struct buf_pr *bp, const ipfw_insn_limit *limit)
1424 {
1425         struct _s_x *p = limit_masks;
1426         char const *comma = " ";
1427         uint8_t x;
1428
1429         for (x = limit->limit_mask; p->x != 0; p++) {
1430                 if ((x & p->x) == p->x) {
1431                         x &= ~p->x;
1432                         bprintf(bp, "%s%s", comma, p->s);
1433                         comma = ",";
1434                 }
1435         }
1436         bprint_uint_arg(bp, " ", limit->conn_limit);
1437 }
1438
1439 static int
1440 print_instruction(struct buf_pr *bp, const struct format_opts *fo,
1441     struct show_state *state, ipfw_insn *cmd)
1442 {
1443         struct protoent *pe;
1444         struct passwd *pwd;
1445         struct group *grp;
1446         const char *s;
1447         double d;
1448
1449         if (is_printed_opcode(state, cmd))
1450                 return (0);
1451         if ((cmd->len & F_OR) != 0 && state->or_block == 0)
1452                 bprintf(bp, " {");
1453         if (cmd->opcode != O_IN && (cmd->len & F_NOT) != 0)
1454                 bprintf(bp, " not");
1455
1456         switch (cmd->opcode) {
1457         case O_PROB:
1458                 d = 1.0 * insntod(cmd, u32)->d[0] / 0x7fffffff;
1459                 bprintf(bp, "prob %f ", d);
1460                 break;
1461         case O_PROBE_STATE: /* no need to print anything here */
1462                 state->flags |= HAVE_PROBE_STATE;
1463                 break;
1464         case O_IP_SRC:
1465         case O_IP_SRC_LOOKUP:
1466         case O_IP_SRC_MASK:
1467         case O_IP_SRC_ME:
1468         case O_IP_SRC_SET:
1469                 if (state->flags & HAVE_SRCIP)
1470                         bprintf(bp, " src-ip");
1471                 print_ip(bp, fo, insntod(cmd, ip));
1472                 break;
1473         case O_IP_DST:
1474         case O_IP_DST_LOOKUP:
1475         case O_IP_DST_MASK:
1476         case O_IP_DST_ME:
1477         case O_IP_DST_SET:
1478                 if (state->flags & HAVE_DSTIP)
1479                         bprintf(bp, " dst-ip");
1480                 print_ip(bp, fo, insntod(cmd, ip));
1481                 break;
1482         case O_IP6_SRC:
1483         case O_IP6_SRC_MASK:
1484         case O_IP6_SRC_ME:
1485                 if (state->flags & HAVE_SRCIP)
1486                         bprintf(bp, " src-ip6");
1487                 print_ip6(bp, insntod(cmd, ip6));
1488                 break;
1489         case O_IP6_DST:
1490         case O_IP6_DST_MASK:
1491         case O_IP6_DST_ME:
1492                 if (state->flags & HAVE_DSTIP)
1493                         bprintf(bp, " dst-ip6");
1494                 print_ip6(bp, insntod(cmd, ip6));
1495                 break;
1496         case O_FLOW6ID:
1497                 print_flow6id(bp, insntod(cmd, u32));
1498                 break;
1499         case O_IP_DSTPORT:
1500         case O_IP_SRCPORT:
1501                 print_newports(bp, insntod(cmd, u16), state->proto,
1502                     (state->flags & (HAVE_SRCIP | HAVE_DSTIP)) ==
1503                     (HAVE_SRCIP | HAVE_DSTIP) ?  cmd->opcode: 0);
1504                 break;
1505         case O_PROTO:
1506                 pe = getprotobynumber(cmd->arg1);
1507                 if (state->flags & HAVE_PROTO)
1508                         bprintf(bp, " proto");
1509                 if (pe != NULL)
1510                         bprintf(bp, " %s", pe->p_name);
1511                 else
1512                         bprintf(bp, " %u", cmd->arg1);
1513                 break;
1514         case O_MACADDR2:
1515                 print_mac(bp, insntod(cmd, mac));
1516                 break;
1517         case O_MAC_TYPE:
1518                 print_newports(bp, insntod(cmd, u16),
1519                     IPPROTO_ETHERTYPE, cmd->opcode);
1520                 break;
1521         case O_FRAG:
1522                 bprintf(bp, " frag");
1523                 break;
1524         case O_FIB:
1525                 bprintf(bp, " fib %u", cmd->arg1);
1526                 break;
1527         case O_SOCKARG:
1528                 bprintf(bp, " sockarg");
1529                 break;
1530         case O_IN:
1531                 bprintf(bp, cmd->len & F_NOT ? " out" : " in");
1532                 break;
1533         case O_DIVERTED:
1534                 switch (cmd->arg1) {
1535                 case 3:
1536                         bprintf(bp, " diverted");
1537                         break;
1538                 case 2:
1539                         bprintf(bp, " diverted-output");
1540                         break;
1541                 case 1:
1542                         bprintf(bp, " diverted-loopback");
1543                         break;
1544                 default:
1545                         bprintf(bp, " diverted-?<%u>", cmd->arg1);
1546                         break;
1547                 }
1548                 break;
1549         case O_LAYER2:
1550                 bprintf(bp, " layer2");
1551                 break;
1552         case O_XMIT:
1553         case O_RECV:
1554         case O_VIA:
1555                 if (cmd->opcode == O_XMIT)
1556                         s = "xmit";
1557                 else if (cmd->opcode == O_RECV)
1558                         s = "recv";
1559                 else /* if (cmd->opcode == O_VIA) */
1560                         s = "via";
1561                 switch (insntod(cmd, if)->name[0]) {
1562                 case '\0':
1563                         bprintf(bp, " %s %s", s,
1564                             inet_ntoa(insntod(cmd, if)->p.ip));
1565                         break;
1566                 case '\1':
1567                         bprintf(bp, " %s table(%s)", s,
1568                             table_search_ctlv(fo->tstate,
1569                             insntod(cmd, if)->p.kidx));
1570                         break;
1571                 default:
1572                         bprintf(bp, " %s %s", s,
1573                             insntod(cmd, if)->name);
1574                 }
1575                 break;
1576         case O_IP_FLOW_LOOKUP:
1577                 s = table_search_ctlv(fo->tstate, cmd->arg1);
1578                 bprintf(bp, " flow table(%s", s);
1579                 if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_u32))
1580                         bprintf(bp, ",%u", insntod(cmd, u32)->d[0]);
1581                 bprintf(bp, ")");
1582                 break;
1583         case O_IPID:
1584         case O_IPTTL:
1585         case O_IPLEN:
1586         case O_TCPDATALEN:
1587         case O_TCPWIN:
1588                 if (F_LEN(cmd) == 1) {
1589                         switch (cmd->opcode) {
1590                         case O_IPID:
1591                                 s = "ipid";
1592                                 break;
1593                         case O_IPTTL:
1594                                 s = "ipttl";
1595                                 break;
1596                         case O_IPLEN:
1597                                 s = "iplen";
1598                                 break;
1599                         case O_TCPDATALEN:
1600                                 s = "tcpdatalen";
1601                                 break;
1602                         case O_TCPWIN:
1603                                 s = "tcpwin";
1604                                 break;
1605                         }
1606                         bprintf(bp, " %s %u", s, cmd->arg1);
1607                 } else
1608                         print_newports(bp, insntod(cmd, u16), 0,
1609                             cmd->opcode);
1610                 break;
1611         case O_IPVER:
1612                 bprintf(bp, " ipver %u", cmd->arg1);
1613                 break;
1614         case O_IPPRECEDENCE:
1615                 bprintf(bp, " ipprecedence %u", cmd->arg1 >> 5);
1616                 break;
1617         case O_DSCP:
1618                 print_dscp(bp, insntod(cmd, u32));
1619                 break;
1620         case O_IPOPT:
1621                 print_flags(bp, "ipoptions", cmd, f_ipopts);
1622                 break;
1623         case O_IPTOS:
1624                 print_flags(bp, "iptos", cmd, f_iptos);
1625                 break;
1626         case O_ICMPTYPE:
1627                 print_icmptypes(bp, insntod(cmd, u32));
1628                 break;
1629         case O_ESTAB:
1630                 bprintf(bp, " established");
1631                 break;
1632         case O_TCPFLAGS:
1633                 print_flags(bp, "tcpflags", cmd, f_tcpflags);
1634                 break;
1635         case O_TCPOPTS:
1636                 print_flags(bp, "tcpoptions", cmd, f_tcpopts);
1637                 break;
1638         case O_TCPACK:
1639                 bprintf(bp, " tcpack %d",
1640                     ntohl(insntod(cmd, u32)->d[0]));
1641                 break;
1642         case O_TCPSEQ:
1643                 bprintf(bp, " tcpseq %d",
1644                     ntohl(insntod(cmd, u32)->d[0]));
1645                 break;
1646         case O_UID:
1647                 pwd = getpwuid(insntod(cmd, u32)->d[0]);
1648                 if (pwd != NULL)
1649                         bprintf(bp, " uid %s", pwd->pw_name);
1650                 else
1651                         bprintf(bp, " uid %u",
1652                             insntod(cmd, u32)->d[0]);
1653                 break;
1654         case O_GID:
1655                 grp = getgrgid(insntod(cmd, u32)->d[0]);
1656                 if (grp != NULL)
1657                         bprintf(bp, " gid %s", grp->gr_name);
1658                 else
1659                         bprintf(bp, " gid %u",
1660                             insntod(cmd, u32)->d[0]);
1661                 break;
1662         case O_JAIL:
1663                 bprintf(bp, " jail %d", insntod(cmd, u32)->d[0]);
1664                 break;
1665         case O_VERREVPATH:
1666                 bprintf(bp, " verrevpath");
1667                 break;
1668         case O_VERSRCREACH:
1669                 bprintf(bp, " versrcreach");
1670                 break;
1671         case O_ANTISPOOF:
1672                 bprintf(bp, " antispoof");
1673                 break;
1674         case O_IPSEC:
1675                 bprintf(bp, " ipsec");
1676                 break;
1677         case O_NOP:
1678                 bprintf(bp, " // %s", (char *)(cmd + 1));
1679                 break;
1680         case O_KEEP_STATE:
1681                 if (state->flags & HAVE_PROBE_STATE)
1682                         bprintf(bp, " keep-state");
1683                 else
1684                         bprintf(bp, " record-state");
1685                 bprintf(bp, " :%s",
1686                     object_search_ctlv(fo->tstate, cmd->arg1,
1687                     IPFW_TLV_STATE_NAME));
1688                 break;
1689         case O_LIMIT:
1690                 if (state->flags & HAVE_PROBE_STATE)
1691                         bprintf(bp, " limit");
1692                 else
1693                         bprintf(bp, " set-limit");
1694                 print_limit_mask(bp, insntod(cmd, limit));
1695                 bprintf(bp, " :%s",
1696                     object_search_ctlv(fo->tstate, cmd->arg1,
1697                     IPFW_TLV_STATE_NAME));
1698                 break;
1699         case O_IP6:
1700                 bprintf(bp, " ip6");
1701                 break;
1702         case O_IP4:
1703                 bprintf(bp, " ip4");
1704                 break;
1705         case O_ICMP6TYPE:
1706                 print_icmp6types(bp, insntod(cmd, u32));
1707                 break;
1708         case O_EXT_HDR:
1709                 print_ext6hdr(bp, cmd);
1710                 break;
1711         case O_TAGGED:
1712                 if (F_LEN(cmd) == 1)
1713                         bprint_uint_arg(bp, " tagged ", cmd->arg1);
1714                 else
1715                         print_newports(bp, insntod(cmd, u16),
1716                                     0, O_TAGGED);
1717                 break;
1718         case O_SKIP_ACTION:
1719                 bprintf(bp, " defer-immediate-action");
1720                 break;
1721         default:
1722                 bprintf(bp, " [opcode %d len %d]", cmd->opcode,
1723                     cmd->len);
1724         }
1725         if (cmd->len & F_OR) {
1726                 bprintf(bp, " or");
1727                 state->or_block = 1;
1728         } else if (state->or_block != 0) {
1729                 bprintf(bp, " }");
1730                 state->or_block = 0;
1731         }
1732         mark_printed(state, cmd);
1733
1734         return (1);
1735 }
1736
1737 static ipfw_insn *
1738 print_opcode(struct buf_pr *bp, struct format_opts *fo,
1739     struct show_state *state, int opcode)
1740 {
1741         ipfw_insn *cmd;
1742         int l;
1743
1744         for (l = state->rule->act_ofs, cmd = state->rule->cmd;
1745             l > 0; l -= F_LEN(cmd), cmd += F_LEN(cmd)) {
1746                 /* We use zero opcode to print the rest of options */
1747                 if (opcode >= 0 && cmd->opcode != opcode)
1748                         continue;
1749                 /*
1750                  * Skip O_NOP, when we printing the rest
1751                  * of options, it will be handled separately.
1752                  */
1753                 if (cmd->opcode == O_NOP && opcode != O_NOP)
1754                         continue;
1755                 if (!print_instruction(bp, fo, state, cmd))
1756                         continue;
1757                 return (cmd);
1758         }
1759         return (NULL);
1760 }
1761
1762 static void
1763 print_fwd(struct buf_pr *bp, const ipfw_insn *cmd)
1764 {
1765         char buf[INET6_ADDRSTRLEN + IF_NAMESIZE + 2];
1766         ipfw_insn_sa6 *sa6;
1767         ipfw_insn_sa *sa;
1768         uint16_t port;
1769
1770         if (cmd->opcode == O_FORWARD_IP) {
1771                 sa = insntod(cmd, sa);
1772                 port = sa->sa.sin_port;
1773                 if (sa->sa.sin_addr.s_addr == INADDR_ANY)
1774                         bprintf(bp, "fwd tablearg");
1775                 else
1776                         bprintf(bp, "fwd %s", inet_ntoa(sa->sa.sin_addr));
1777         } else {
1778                 sa6 = insntod(cmd, sa6);
1779                 port = sa6->sa.sin6_port;
1780                 bprintf(bp, "fwd ");
1781                 if (getnameinfo((const struct sockaddr *)&sa6->sa,
1782                     sizeof(struct sockaddr_in6), buf, sizeof(buf), NULL, 0,
1783                     NI_NUMERICHOST) == 0)
1784                         bprintf(bp, "%s", buf);
1785         }
1786         if (port != 0)
1787                 bprintf(bp, ",%u", port);
1788 }
1789
1790 static int
1791 print_action_instruction(struct buf_pr *bp, const struct format_opts *fo,
1792     struct show_state *state, const ipfw_insn *cmd)
1793 {
1794         const char *s;
1795
1796         if (is_printed_opcode(state, cmd))
1797                 return (0);
1798         switch (cmd->opcode) {
1799         case O_CHECK_STATE:
1800                 bprintf(bp, "check-state");
1801                 if (cmd->arg1 != 0)
1802                         s = object_search_ctlv(fo->tstate, cmd->arg1,
1803                             IPFW_TLV_STATE_NAME);
1804                 else
1805                         s = NULL;
1806                 bprintf(bp, " :%s", s ? s: "any");
1807                 break;
1808         case O_ACCEPT:
1809                 bprintf(bp, "allow");
1810                 break;
1811         case O_COUNT:
1812                 bprintf(bp, "count");
1813                 break;
1814         case O_DENY:
1815                 bprintf(bp, "deny");
1816                 break;
1817         case O_REJECT:
1818                 if (cmd->arg1 == ICMP_REJECT_RST)
1819                         bprintf(bp, "reset");
1820                 else if (cmd->arg1 == ICMP_REJECT_ABORT)
1821                         bprintf(bp, "abort");
1822                 else if (cmd->arg1 == ICMP_UNREACH_HOST)
1823                         bprintf(bp, "reject");
1824                 else
1825                         print_reject_code(bp, cmd->arg1);
1826                 break;
1827         case O_UNREACH6:
1828                 if (cmd->arg1 == ICMP6_UNREACH_RST)
1829                         bprintf(bp, "reset6");
1830                 else if (cmd->arg1 == ICMP6_UNREACH_ABORT)
1831                         bprintf(bp, "abort6");
1832                 else
1833                         print_unreach6_code(bp, cmd->arg1);
1834                 break;
1835         case O_SKIPTO:
1836                 bprint_uint_arg(bp, "skipto ", cmd->arg1);
1837                 break;
1838         case O_PIPE:
1839                 bprint_uint_arg(bp, "pipe ", cmd->arg1);
1840                 break;
1841         case O_QUEUE:
1842                 bprint_uint_arg(bp, "queue ", cmd->arg1);
1843                 break;
1844         case O_DIVERT:
1845                 bprint_uint_arg(bp, "divert ", cmd->arg1);
1846                 break;
1847         case O_TEE:
1848                 bprint_uint_arg(bp, "tee ", cmd->arg1);
1849                 break;
1850         case O_NETGRAPH:
1851                 bprint_uint_arg(bp, "netgraph ", cmd->arg1);
1852                 break;
1853         case O_NGTEE:
1854                 bprint_uint_arg(bp, "ngtee ", cmd->arg1);
1855                 break;
1856         case O_FORWARD_IP:
1857         case O_FORWARD_IP6:
1858                 print_fwd(bp, cmd);
1859                 break;
1860         case O_LOG:
1861                 if (insntod(cmd, log)->max_log > 0)
1862                         bprintf(bp, " log logamount %d",
1863                             insntod(cmd, log)->max_log);
1864                 else
1865                         bprintf(bp, " log");
1866                 break;
1867         case O_ALTQ:
1868 #ifndef NO_ALTQ
1869                 print_altq_cmd(bp, insntod(cmd, altq));
1870 #endif
1871                 break;
1872         case O_TAG:
1873                 bprint_uint_arg(bp, cmd->len & F_NOT ? " untag ":
1874                     " tag ", cmd->arg1);
1875                 break;
1876         case O_NAT:
1877                 if (cmd->arg1 != IP_FW_NAT44_GLOBAL)
1878                         bprint_uint_arg(bp, "nat ", cmd->arg1);
1879                 else
1880                         bprintf(bp, "nat global");
1881                 break;
1882         case O_SETFIB:
1883                 if (cmd->arg1 == IP_FW_TARG)
1884                         bprint_uint_arg(bp, "setfib ", cmd->arg1);
1885                 else
1886                         bprintf(bp, "setfib %u", cmd->arg1 & 0x7FFF);
1887                 break;
1888         case O_EXTERNAL_ACTION:
1889                 /*
1890                  * The external action can consists of two following
1891                  * each other opcodes - O_EXTERNAL_ACTION and
1892                  * O_EXTERNAL_INSTANCE. The first contains the ID of
1893                  * name of external action. The second contains the ID
1894                  * of name of external action instance.
1895                  * NOTE: in case when external action has no named
1896                  * instances support, the second opcode isn't needed.
1897                  */
1898                 state->eaction = cmd;
1899                 s = object_search_ctlv(fo->tstate, cmd->arg1,
1900                     IPFW_TLV_EACTION);
1901                 if (match_token(rule_eactions, s) != -1)
1902                         bprintf(bp, "%s", s);
1903                 else
1904                         bprintf(bp, "eaction %s", s);
1905                 break;
1906         case O_EXTERNAL_INSTANCE:
1907                 if (state->eaction == NULL)
1908                         break;
1909                 /*
1910                  * XXX: we need to teach ipfw(9) to rewrite opcodes
1911                  * in the user buffer on rule addition. When we add
1912                  * the rule, we specify zero TLV type for
1913                  * O_EXTERNAL_INSTANCE object. To show correct
1914                  * rule after `ipfw add` we need to search instance
1915                  * name with zero type. But when we do `ipfw show`
1916                  * we calculate TLV type using IPFW_TLV_EACTION_NAME()
1917                  * macro.
1918                  */
1919                 s = object_search_ctlv(fo->tstate, cmd->arg1, 0);
1920                 if (s == NULL)
1921                         s = object_search_ctlv(fo->tstate,
1922                             cmd->arg1, IPFW_TLV_EACTION_NAME(
1923                             state->eaction->arg1));
1924                 bprintf(bp, " %s", s);
1925                 break;
1926         case O_EXTERNAL_DATA:
1927                 if (state->eaction == NULL)
1928                         break;
1929                 /*
1930                  * Currently we support data formatting only for
1931                  * external data with datalen u16. For unknown data
1932                  * print its size in bytes.
1933                  */
1934                 if (cmd->len == F_INSN_SIZE(ipfw_insn))
1935                         bprintf(bp, " %u", cmd->arg1);
1936                 else
1937                         bprintf(bp, " %ubytes",
1938                             cmd->len * sizeof(uint32_t));
1939                 break;
1940         case O_SETDSCP:
1941                 if (cmd->arg1 == IP_FW_TARG) {
1942                         bprintf(bp, "setdscp tablearg");
1943                         break;
1944                 }
1945                 s = match_value(f_ipdscp, cmd->arg1 & 0x3F);
1946                 if (s != NULL)
1947                         bprintf(bp, "setdscp %s", s);
1948                 else
1949                         bprintf(bp, "setdscp %u", cmd->arg1 & 0x3F);
1950                 break;
1951         case O_REASS:
1952                 bprintf(bp, "reass");
1953                 break;
1954         case O_CALLRETURN:
1955                 if (cmd->len & F_NOT)
1956                         bprintf(bp, "return");
1957                 else
1958                         bprint_uint_arg(bp, "call ", cmd->arg1);
1959                 break;
1960         default:
1961                 bprintf(bp, "** unrecognized action %d len %d ",
1962                         cmd->opcode, cmd->len);
1963         }
1964         mark_printed(state, cmd);
1965
1966         return (1);
1967 }
1968
1969
1970 static ipfw_insn *
1971 print_action(struct buf_pr *bp, struct format_opts *fo,
1972     struct show_state *state, uint8_t opcode)
1973 {
1974         ipfw_insn *cmd;
1975         int l;
1976
1977         for (l = state->rule->cmd_len - state->rule->act_ofs,
1978             cmd = ACTION_PTR(state->rule); l > 0;
1979             l -= F_LEN(cmd), cmd += F_LEN(cmd)) {
1980                 if (cmd->opcode != opcode)
1981                         continue;
1982                 if (!print_action_instruction(bp, fo, state, cmd))
1983                         continue;
1984                 return (cmd);
1985         }
1986         return (NULL);
1987 }
1988
1989 static void
1990 print_proto(struct buf_pr *bp, struct format_opts *fo,
1991     struct show_state *state)
1992 {
1993         ipfw_insn *cmd;
1994         int l, proto, ip4, ip6, tmp;
1995
1996         /* Count all O_PROTO, O_IP4, O_IP6 instructions. */
1997         proto = tmp = ip4 = ip6 = 0;
1998         for (l = state->rule->act_ofs, cmd = state->rule->cmd;
1999             l > 0; l -= F_LEN(cmd), cmd += F_LEN(cmd)) {
2000                 switch (cmd->opcode) {
2001                 case O_PROTO:
2002                         proto++;
2003                         break;
2004                 case O_IP4:
2005                         ip4 = 1;
2006                         if (cmd->len & F_OR)
2007                                 ip4++;
2008                         break;
2009                 case O_IP6:
2010                         ip6 = 1;
2011                         if (cmd->len & F_OR)
2012                                 ip6++;
2013                         break;
2014                 default:
2015                         continue;
2016                 }
2017         }
2018         if (proto == 0 && ip4 == 0 && ip6 == 0) {
2019                 state->proto = IPPROTO_IP;
2020                 state->flags |= HAVE_PROTO;
2021                 bprintf(bp, " ip");
2022                 return;
2023         }
2024         /* To handle the case { ip4 or ip6 }, print opcode with F_OR first */
2025         cmd = NULL;
2026         if (ip4 || ip6)
2027                 cmd = print_opcode(bp, fo, state, ip4 > ip6 ? O_IP4: O_IP6);
2028         if (cmd != NULL && (cmd->len & F_OR))
2029                 cmd = print_opcode(bp, fo, state, ip4 > ip6 ? O_IP6: O_IP4);
2030         if (cmd == NULL || (cmd->len & F_OR))
2031                 for (l = proto; l > 0; l--) {
2032                         cmd = print_opcode(bp, fo, state, O_PROTO);
2033                         if (cmd != NULL && (cmd->len & F_OR) == 0)
2034                                 break;
2035                         tmp = cmd->arg1;
2036                 }
2037         /* Initialize proto, it is used by print_newports() */
2038         if (tmp != 0)
2039                 state->proto = tmp;
2040         else if (ip6 != 0)
2041                 state->proto = IPPROTO_IPV6;
2042         else
2043                 state->proto = IPPROTO_IP;
2044         state->flags |= HAVE_PROTO;
2045 }
2046
2047 static int
2048 match_opcode(int opcode, const int opcodes[], size_t nops)
2049 {
2050         int i;
2051
2052         for (i = 0; i < nops; i++)
2053                 if (opcode == opcodes[i])
2054                         return (1);
2055         return (0);
2056 }
2057
2058 static void
2059 print_address(struct buf_pr *bp, struct format_opts *fo,
2060     struct show_state *state, const int opcodes[], size_t nops, int portop,
2061     int flag)
2062 {
2063         ipfw_insn *cmd;
2064         int count, l, portcnt, pf;
2065
2066         count = portcnt = 0;
2067         for (l = state->rule->act_ofs, cmd = state->rule->cmd;
2068             l > 0; l -= F_LEN(cmd), cmd += F_LEN(cmd)) {
2069                 if (match_opcode(cmd->opcode, opcodes, nops))
2070                         count++;
2071                 else if (cmd->opcode == portop)
2072                         portcnt++;
2073         }
2074         if (count == 0)
2075                 bprintf(bp, " any");
2076         for (l = state->rule->act_ofs, cmd = state->rule->cmd;
2077             l > 0 && count > 0; l -= F_LEN(cmd), cmd += F_LEN(cmd)) {
2078                 if (!match_opcode(cmd->opcode, opcodes, nops))
2079                         continue;
2080                 print_instruction(bp, fo, state, cmd);
2081                 if ((cmd->len & F_OR) == 0)
2082                         break;
2083                 count--;
2084         }
2085         /*
2086          * If several O_IP_?PORT opcodes specified, leave them to the
2087          * options section.
2088          */
2089         if (portcnt == 1) {
2090                 for (l = state->rule->act_ofs, cmd = state->rule->cmd, pf = 0;
2091                     l > 0; l -= F_LEN(cmd), cmd += F_LEN(cmd)) {
2092                         if (cmd->opcode != portop) {
2093                                 pf = (cmd->len & F_OR);
2094                                 continue;
2095                         }
2096                         /* Print opcode iff it is not in OR block. */
2097                         if (pf == 0 && (cmd->len & F_OR) == 0)
2098                                 print_instruction(bp, fo, state, cmd);
2099                         break;
2100                 }
2101         }
2102         state->flags |= flag;
2103 }
2104
2105 static const int action_opcodes[] = {
2106         O_CHECK_STATE, O_ACCEPT, O_COUNT, O_DENY, O_REJECT,
2107         O_UNREACH6, O_SKIPTO, O_PIPE, O_QUEUE, O_DIVERT, O_TEE,
2108         O_NETGRAPH, O_NGTEE, O_FORWARD_IP, O_FORWARD_IP6, O_NAT,
2109         O_SETFIB, O_SETDSCP, O_REASS, O_CALLRETURN,
2110         /* keep the following opcodes at the end of the list */
2111         O_EXTERNAL_ACTION, O_EXTERNAL_INSTANCE, O_EXTERNAL_DATA
2112 };
2113
2114 static const int modifier_opcodes[] = {
2115         O_LOG, O_ALTQ, O_TAG
2116 };
2117
2118 static const int src_opcodes[] = {
2119         O_IP_SRC, O_IP_SRC_LOOKUP, O_IP_SRC_MASK, O_IP_SRC_ME,
2120         O_IP_SRC_SET, O_IP6_SRC, O_IP6_SRC_MASK, O_IP6_SRC_ME
2121 };
2122
2123 static const int dst_opcodes[] = {
2124         O_IP_DST, O_IP_DST_LOOKUP, O_IP_DST_MASK, O_IP_DST_ME,
2125         O_IP_DST_SET, O_IP6_DST, O_IP6_DST_MASK, O_IP6_DST_ME
2126 };
2127
2128 static void
2129 show_static_rule(struct cmdline_opts *co, struct format_opts *fo,
2130     struct buf_pr *bp, struct ip_fw_rule *rule, struct ip_fw_bcounter *cntr)
2131 {
2132         struct show_state state;
2133         ipfw_insn *cmd;
2134         static int twidth = 0;
2135         int i;
2136
2137         /* Print # DISABLED or skip the rule */
2138         if ((fo->set_mask & (1 << rule->set)) == 0) {
2139                 /* disabled mask */
2140                 if (!co->show_sets)
2141                         return;
2142                 else
2143                         bprintf(bp, "# DISABLED ");
2144         }
2145         if (init_show_state(&state, rule) != 0) {
2146                 warn("init_show_state() failed");
2147                 return;
2148         }
2149         bprintf(bp, "%05u ", rule->rulenum);
2150
2151         /* Print counters if enabled */
2152         if (fo->pcwidth > 0 || fo->bcwidth > 0) {
2153                 pr_u64(bp, &cntr->pcnt, fo->pcwidth);
2154                 pr_u64(bp, &cntr->bcnt, fo->bcwidth);
2155         }
2156
2157         /* Print timestamp */
2158         if (co->do_time == TIMESTAMP_NUMERIC)
2159                 bprintf(bp, "%10u ", cntr->timestamp);
2160         else if (co->do_time == TIMESTAMP_STRING) {
2161                 char timestr[30];
2162                 time_t t = (time_t)0;
2163
2164                 if (twidth == 0) {
2165                         strcpy(timestr, ctime(&t));
2166                         *strchr(timestr, '\n') = '\0';
2167                         twidth = strlen(timestr);
2168                 }
2169                 if (cntr->timestamp > 0) {
2170                         t = _long_to_time(cntr->timestamp);
2171
2172                         strcpy(timestr, ctime(&t));
2173                         *strchr(timestr, '\n') = '\0';
2174                         bprintf(bp, "%s ", timestr);
2175                 } else {
2176                         bprintf(bp, "%*s", twidth, " ");
2177                 }
2178         }
2179
2180         /* Print set number */
2181         if (co->show_sets)
2182                 bprintf(bp, "set %d ", rule->set);
2183
2184         /* Print the optional "match probability" */
2185         cmd = print_opcode(bp, fo, &state, O_PROB);
2186         /* Print rule action */
2187         for (i = 0; i < nitems(action_opcodes); i++) {
2188                 cmd = print_action(bp, fo, &state, action_opcodes[i]);
2189                 if (cmd == NULL)
2190                         continue;
2191                 /* Handle special cases */
2192                 switch (cmd->opcode) {
2193                 case O_CHECK_STATE:
2194                         goto end;
2195                 case O_EXTERNAL_ACTION:
2196                 case O_EXTERNAL_INSTANCE:
2197                         /* External action can have several instructions */
2198                         continue;
2199                 }
2200                 break;
2201         }
2202         /* Print rule modifiers */
2203         for (i = 0; i < nitems(modifier_opcodes); i++)
2204                 print_action(bp, fo, &state, modifier_opcodes[i]);
2205         /*
2206          * Print rule body
2207          */
2208         if (co->comment_only != 0)
2209                 goto end;
2210
2211         if (rule->flags & IPFW_RULE_JUSTOPTS) {
2212                 state.flags |= HAVE_PROTO | HAVE_SRCIP | HAVE_DSTIP;
2213                 goto justopts;
2214         }
2215
2216         print_proto(bp, fo, &state);
2217
2218         /* Print source */
2219         bprintf(bp, " from");
2220         print_address(bp, fo, &state, src_opcodes, nitems(src_opcodes),
2221             O_IP_SRCPORT, HAVE_SRCIP);
2222
2223         /* Print destination */
2224         bprintf(bp, " to");
2225         print_address(bp, fo, &state, dst_opcodes, nitems(dst_opcodes),
2226             O_IP_DSTPORT, HAVE_DSTIP);
2227
2228 justopts:
2229         /* Print the rest of options */
2230         while (print_opcode(bp, fo, &state, -1))
2231                 ;
2232 end:
2233         /* Print comment at the end */
2234         cmd = print_opcode(bp, fo, &state, O_NOP);
2235         if (co->comment_only != 0 && cmd == NULL)
2236                 bprintf(bp, " // ...");
2237         bprintf(bp, "\n");
2238         free_show_state(&state);
2239 }
2240
2241 static void
2242 show_dyn_state(struct cmdline_opts *co, struct format_opts *fo,
2243     struct buf_pr *bp, ipfw_dyn_rule *d)
2244 {
2245         struct protoent *pe;
2246         struct in_addr a;
2247         uint16_t rulenum;
2248         char buf[INET6_ADDRSTRLEN];
2249
2250         if (!co->do_expired) {
2251                 if (!d->expire && !(d->dyn_type == O_LIMIT_PARENT))
2252                         return;
2253         }
2254         bcopy(&d->rule, &rulenum, sizeof(rulenum));
2255         bprintf(bp, "%05d", rulenum);
2256         if (fo->pcwidth > 0 || fo->bcwidth > 0) {
2257                 bprintf(bp, " ");
2258                 pr_u64(bp, &d->pcnt, fo->pcwidth);
2259                 pr_u64(bp, &d->bcnt, fo->bcwidth);
2260                 bprintf(bp, "(%ds)", d->expire);
2261         }
2262         switch (d->dyn_type) {
2263         case O_LIMIT_PARENT:
2264                 bprintf(bp, " PARENT %d", d->count);
2265                 break;
2266         case O_LIMIT:
2267                 bprintf(bp, " LIMIT");
2268                 break;
2269         case O_KEEP_STATE: /* bidir, no mask */
2270                 bprintf(bp, " STATE");
2271                 break;
2272         }
2273
2274         if ((pe = getprotobynumber(d->id.proto)) != NULL)
2275                 bprintf(bp, " %s", pe->p_name);
2276         else
2277                 bprintf(bp, " proto %u", d->id.proto);
2278
2279         if (d->id.addr_type == 4) {
2280                 a.s_addr = htonl(d->id.src_ip);
2281                 bprintf(bp, " %s %d", inet_ntoa(a), d->id.src_port);
2282
2283                 a.s_addr = htonl(d->id.dst_ip);
2284                 bprintf(bp, " <-> %s %d", inet_ntoa(a), d->id.dst_port);
2285         } else if (d->id.addr_type == 6) {
2286                 bprintf(bp, " %s %d", inet_ntop(AF_INET6, &d->id.src_ip6, buf,
2287                     sizeof(buf)), d->id.src_port);
2288                 bprintf(bp, " <-> %s %d", inet_ntop(AF_INET6, &d->id.dst_ip6,
2289                     buf, sizeof(buf)), d->id.dst_port);
2290         } else
2291                 bprintf(bp, " UNKNOWN <-> UNKNOWN");
2292         if (d->kidx != 0)
2293                 bprintf(bp, " :%s", object_search_ctlv(fo->tstate,
2294                     d->kidx, IPFW_TLV_STATE_NAME));
2295 }
2296
2297 static int
2298 do_range_cmd(int cmd, ipfw_range_tlv *rt)
2299 {
2300         ipfw_range_header rh;
2301         size_t sz;
2302
2303         memset(&rh, 0, sizeof(rh));
2304         memcpy(&rh.range, rt, sizeof(*rt));
2305         rh.range.head.length = sizeof(*rt);
2306         rh.range.head.type = IPFW_TLV_RANGE;
2307         sz = sizeof(rh);
2308
2309         if (do_get3(cmd, &rh.opheader, &sz) != 0)
2310                 return (-1);
2311         /* Save number of matched objects */
2312         rt->new_set = rh.range.new_set;
2313         return (0);
2314 }
2315
2316 /*
2317  * This one handles all set-related commands
2318  *      ipfw set { show | enable | disable }
2319  *      ipfw set swap X Y
2320  *      ipfw set move X to Y
2321  *      ipfw set move rule X to Y
2322  */
2323 void
2324 ipfw_sets_handler(char *av[])
2325 {
2326         ipfw_range_tlv rt;
2327         char *msg;
2328         size_t size;
2329         uint32_t masks[2];
2330         int i;
2331         uint16_t rulenum;
2332         uint8_t cmd;
2333
2334         av++;
2335         memset(&rt, 0, sizeof(rt));
2336
2337         if (av[0] == NULL)
2338                 errx(EX_USAGE, "set needs command");
2339         if (_substrcmp(*av, "show") == 0) {
2340                 struct format_opts fo;
2341                 ipfw_cfg_lheader *cfg;
2342
2343                 memset(&fo, 0, sizeof(fo));
2344                 if (ipfw_get_config(&co, &fo, &cfg, &size) != 0)
2345                         err(EX_OSERR, "requesting config failed");
2346
2347                 for (i = 0, msg = "disable"; i < RESVD_SET; i++)
2348                         if ((cfg->set_mask & (1<<i)) == 0) {
2349                                 printf("%s %d", msg, i);
2350                                 msg = "";
2351                         }
2352                 msg = (cfg->set_mask != (uint32_t)-1) ? " enable" : "enable";
2353                 for (i = 0; i < RESVD_SET; i++)
2354                         if ((cfg->set_mask & (1<<i)) != 0) {
2355                                 printf("%s %d", msg, i);
2356                                 msg = "";
2357                         }
2358                 printf("\n");
2359                 free(cfg);
2360         } else if (_substrcmp(*av, "swap") == 0) {
2361                 av++;
2362                 if ( av[0] == NULL || av[1] == NULL )
2363                         errx(EX_USAGE, "set swap needs 2 set numbers\n");
2364                 rt.set = atoi(av[0]);
2365                 rt.new_set = atoi(av[1]);
2366                 if (!isdigit(*(av[0])) || rt.set > RESVD_SET)
2367                         errx(EX_DATAERR, "invalid set number %s\n", av[0]);
2368                 if (!isdigit(*(av[1])) || rt.new_set > RESVD_SET)
2369                         errx(EX_DATAERR, "invalid set number %s\n", av[1]);
2370                 i = do_range_cmd(IP_FW_SET_SWAP, &rt);
2371         } else if (_substrcmp(*av, "move") == 0) {
2372                 av++;
2373                 if (av[0] && _substrcmp(*av, "rule") == 0) {
2374                         rt.flags = IPFW_RCFLAG_RANGE; /* move rules to new set */
2375                         cmd = IP_FW_XMOVE;
2376                         av++;
2377                 } else
2378                         cmd = IP_FW_SET_MOVE; /* Move set to new one */
2379                 if (av[0] == NULL || av[1] == NULL || av[2] == NULL ||
2380                                 av[3] != NULL ||  _substrcmp(av[1], "to") != 0)
2381                         errx(EX_USAGE, "syntax: set move [rule] X to Y\n");
2382                 rulenum = atoi(av[0]);
2383                 rt.new_set = atoi(av[2]);
2384                 if (cmd == IP_FW_XMOVE) {
2385                         rt.start_rule = rulenum;
2386                         rt.end_rule = rulenum;
2387                 } else
2388                         rt.set = rulenum;
2389                 rt.new_set = atoi(av[2]);
2390                 if (!isdigit(*(av[0])) || (cmd == 3 && rt.set > RESVD_SET) ||
2391                         (cmd == 2 && rt.start_rule == IPFW_DEFAULT_RULE) )
2392                         errx(EX_DATAERR, "invalid source number %s\n", av[0]);
2393                 if (!isdigit(*(av[2])) || rt.new_set > RESVD_SET)
2394                         errx(EX_DATAERR, "invalid dest. set %s\n", av[1]);
2395                 i = do_range_cmd(cmd, &rt);
2396                 if (i < 0)
2397                         err(EX_OSERR, "failed to move %s",
2398                             cmd == IP_FW_SET_MOVE ? "set": "rule");
2399         } else if (_substrcmp(*av, "disable") == 0 ||
2400                    _substrcmp(*av, "enable") == 0 ) {
2401                 int which = _substrcmp(*av, "enable") == 0 ? 1 : 0;
2402
2403                 av++;
2404                 masks[0] = masks[1] = 0;
2405
2406                 while (av[0]) {
2407                         if (isdigit(**av)) {
2408                                 i = atoi(*av);
2409                                 if (i < 0 || i > RESVD_SET)
2410                                         errx(EX_DATAERR,
2411                                             "invalid set number %d\n", i);
2412                                 masks[which] |= (1<<i);
2413                         } else if (_substrcmp(*av, "disable") == 0)
2414                                 which = 0;
2415                         else if (_substrcmp(*av, "enable") == 0)
2416                                 which = 1;
2417                         else
2418                                 errx(EX_DATAERR,
2419                                         "invalid set command %s\n", *av);
2420                         av++;
2421                 }
2422                 if ( (masks[0] & masks[1]) != 0 )
2423                         errx(EX_DATAERR,
2424                             "cannot enable and disable the same set\n");
2425
2426                 rt.set = masks[0];
2427                 rt.new_set = masks[1];
2428                 i = do_range_cmd(IP_FW_SET_ENABLE, &rt);
2429                 if (i)
2430                         warn("set enable/disable: setsockopt(IP_FW_SET_ENABLE)");
2431         } else
2432                 errx(EX_USAGE, "invalid set command %s\n", *av);
2433 }
2434
2435 void
2436 ipfw_sysctl_handler(char *av[], int which)
2437 {
2438         av++;
2439
2440         if (av[0] == NULL) {
2441                 warnx("missing keyword to enable/disable\n");
2442         } else if (_substrcmp(*av, "firewall") == 0) {
2443                 sysctlbyname("net.inet.ip.fw.enable", NULL, 0,
2444                     &which, sizeof(which));
2445                 sysctlbyname("net.inet6.ip6.fw.enable", NULL, 0,
2446                     &which, sizeof(which));
2447         } else if (_substrcmp(*av, "one_pass") == 0) {
2448                 sysctlbyname("net.inet.ip.fw.one_pass", NULL, 0,
2449                     &which, sizeof(which));
2450         } else if (_substrcmp(*av, "debug") == 0) {
2451                 sysctlbyname("net.inet.ip.fw.debug", NULL, 0,
2452                     &which, sizeof(which));
2453         } else if (_substrcmp(*av, "verbose") == 0) {
2454                 sysctlbyname("net.inet.ip.fw.verbose", NULL, 0,
2455                     &which, sizeof(which));
2456         } else if (_substrcmp(*av, "dyn_keepalive") == 0) {
2457                 sysctlbyname("net.inet.ip.fw.dyn_keepalive", NULL, 0,
2458                     &which, sizeof(which));
2459 #ifndef NO_ALTQ
2460         } else if (_substrcmp(*av, "altq") == 0) {
2461                 altq_set_enabled(which);
2462 #endif
2463         } else {
2464                 warnx("unrecognize enable/disable keyword: %s\n", *av);
2465         }
2466 }
2467
2468 typedef void state_cb(struct cmdline_opts *co, struct format_opts *fo,
2469     void *arg, void *state);
2470
2471 static void
2472 prepare_format_dyn(struct cmdline_opts *co, struct format_opts *fo,
2473     void *arg, void *_state)
2474 {
2475         ipfw_dyn_rule *d;
2476         int width;
2477         uint8_t set;
2478
2479         d = (ipfw_dyn_rule *)_state;
2480         /* Count _ALL_ states */
2481         fo->dcnt++;
2482
2483         if (fo->show_counters == 0)
2484                 return;
2485
2486         if (co->use_set) {
2487                 /* skip states from another set */
2488                 bcopy((char *)&d->rule + sizeof(uint16_t), &set,
2489                     sizeof(uint8_t));
2490                 if (set != co->use_set - 1)
2491                         return;
2492         }
2493
2494         width = pr_u64(NULL, &d->pcnt, 0);
2495         if (width > fo->pcwidth)
2496                 fo->pcwidth = width;
2497
2498         width = pr_u64(NULL, &d->bcnt, 0);
2499         if (width > fo->bcwidth)
2500                 fo->bcwidth = width;
2501 }
2502
2503 static int
2504 foreach_state(struct cmdline_opts *co, struct format_opts *fo,
2505     caddr_t base, size_t sz, state_cb dyn_bc, void *dyn_arg)
2506 {
2507         int ttype;
2508         state_cb *fptr;
2509         void *farg;
2510         ipfw_obj_tlv *tlv;
2511         ipfw_obj_ctlv *ctlv;
2512
2513         fptr = NULL;
2514         ttype = 0;
2515
2516         while (sz > 0) {
2517                 ctlv = (ipfw_obj_ctlv *)base;
2518                 switch (ctlv->head.type) {
2519                 case IPFW_TLV_DYNSTATE_LIST:
2520                         base += sizeof(*ctlv);
2521                         sz -= sizeof(*ctlv);
2522                         ttype = IPFW_TLV_DYN_ENT;
2523                         fptr = dyn_bc;
2524                         farg = dyn_arg;
2525                         break;
2526                 default:
2527                         return (sz);
2528                 }
2529
2530                 while (sz > 0) {
2531                         tlv = (ipfw_obj_tlv *)base;
2532                         if (tlv->type != ttype)
2533                                 break;
2534
2535                         fptr(co, fo, farg, tlv + 1);
2536                         sz -= tlv->length;
2537                         base += tlv->length;
2538                 }
2539         }
2540
2541         return (sz);
2542 }
2543
2544 static void
2545 prepare_format_opts(struct cmdline_opts *co, struct format_opts *fo,
2546     ipfw_obj_tlv *rtlv, int rcnt, caddr_t dynbase, size_t dynsz)
2547 {
2548         int bcwidth, pcwidth, width;
2549         int n;
2550         struct ip_fw_bcounter *cntr;
2551         struct ip_fw_rule *r;
2552
2553         bcwidth = 0;
2554         pcwidth = 0;
2555         if (fo->show_counters != 0) {
2556                 for (n = 0; n < rcnt; n++,
2557                     rtlv = (ipfw_obj_tlv *)((caddr_t)rtlv + rtlv->length)) {
2558                         cntr = (struct ip_fw_bcounter *)(rtlv + 1);
2559                         r = (struct ip_fw_rule *)((caddr_t)cntr + cntr->size);
2560                         /* skip rules from another set */
2561                         if (co->use_set && r->set != co->use_set - 1)
2562                                 continue;
2563
2564                         /* packet counter */
2565                         width = pr_u64(NULL, &cntr->pcnt, 0);
2566                         if (width > pcwidth)
2567                                 pcwidth = width;
2568
2569                         /* byte counter */
2570                         width = pr_u64(NULL, &cntr->bcnt, 0);
2571                         if (width > bcwidth)
2572                                 bcwidth = width;
2573                 }
2574         }
2575         fo->bcwidth = bcwidth;
2576         fo->pcwidth = pcwidth;
2577
2578         fo->dcnt = 0;
2579         if (co->do_dynamic && dynsz > 0)
2580                 foreach_state(co, fo, dynbase, dynsz, prepare_format_dyn, NULL);
2581 }
2582
2583 static int
2584 list_static_range(struct cmdline_opts *co, struct format_opts *fo,
2585     struct buf_pr *bp, ipfw_obj_tlv *rtlv, int rcnt)
2586 {
2587         int n, seen;
2588         struct ip_fw_rule *r;
2589         struct ip_fw_bcounter *cntr;
2590         int c = 0;
2591
2592         for (n = seen = 0; n < rcnt; n++,
2593             rtlv = (ipfw_obj_tlv *)((caddr_t)rtlv + rtlv->length)) {
2594
2595                 if ((fo->show_counters | fo->show_time) != 0) {
2596                         cntr = (struct ip_fw_bcounter *)(rtlv + 1);
2597                         r = (struct ip_fw_rule *)((caddr_t)cntr + cntr->size);
2598                 } else {
2599                         cntr = NULL;
2600                         r = (struct ip_fw_rule *)(rtlv + 1);
2601                 }
2602                 if (r->rulenum > fo->last)
2603                         break;
2604                 if (co->use_set && r->set != co->use_set - 1)
2605                         continue;
2606                 if (r->rulenum >= fo->first && r->rulenum <= fo->last) {
2607                         show_static_rule(co, fo, bp, r, cntr);
2608                         printf("%s", bp->buf);
2609                         c += rtlv->length;
2610                         bp_flush(bp);
2611                         seen++;
2612                 }
2613         }
2614
2615         return (seen);
2616 }
2617
2618 static void
2619 list_dyn_state(struct cmdline_opts *co, struct format_opts *fo,
2620     void *_arg, void *_state)
2621 {
2622         uint16_t rulenum;
2623         uint8_t set;
2624         ipfw_dyn_rule *d;
2625         struct buf_pr *bp;
2626
2627         d = (ipfw_dyn_rule *)_state;
2628         bp = (struct buf_pr *)_arg;
2629
2630         bcopy(&d->rule, &rulenum, sizeof(rulenum));
2631         if (rulenum > fo->last)
2632                 return;
2633         if (co->use_set) {
2634                 bcopy((char *)&d->rule + sizeof(uint16_t),
2635                       &set, sizeof(uint8_t));
2636                 if (set != co->use_set - 1)
2637                         return;
2638         }
2639         if (rulenum >= fo->first) {
2640                 show_dyn_state(co, fo, bp, d);
2641                 printf("%s\n", bp->buf);
2642                 bp_flush(bp);
2643         }
2644 }
2645
2646 static int
2647 list_dyn_range(struct cmdline_opts *co, struct format_opts *fo,
2648     struct buf_pr *bp, caddr_t base, size_t sz)
2649 {
2650
2651         sz = foreach_state(co, fo, base, sz, list_dyn_state, bp);
2652         return (sz);
2653 }
2654
2655 void
2656 ipfw_list(int ac, char *av[], int show_counters)
2657 {
2658         ipfw_cfg_lheader *cfg;
2659         struct format_opts sfo;
2660         size_t sz;
2661         int error;
2662         int lac;
2663         char **lav;
2664         uint32_t rnum;
2665         char *endptr;
2666
2667         if (co.test_only) {
2668                 fprintf(stderr, "Testing only, list disabled\n");
2669                 return;
2670         }
2671         if (co.do_pipe) {
2672                 dummynet_list(ac, av, show_counters);
2673                 return;
2674         }
2675
2676         ac--;
2677         av++;
2678         memset(&sfo, 0, sizeof(sfo));
2679
2680         /* Determine rule range to request */
2681         if (ac > 0) {
2682                 for (lac = ac, lav = av; lac != 0; lac--) {
2683                         rnum = strtoul(*lav++, &endptr, 10);
2684                         if (sfo.first == 0 || rnum < sfo.first)
2685                                 sfo.first = rnum;
2686
2687                         if (*endptr == '-')
2688                                 rnum = strtoul(endptr + 1, &endptr, 10);
2689                         if (sfo.last == 0 || rnum > sfo.last)
2690                                 sfo.last = rnum;
2691                 }
2692         }
2693
2694         /* get configuraion from kernel */
2695         cfg = NULL;
2696         sfo.show_counters = show_counters;
2697         sfo.show_time = co.do_time;
2698         sfo.flags = IPFW_CFG_GET_STATIC;
2699         if (co.do_dynamic != 0)
2700                 sfo.flags |= IPFW_CFG_GET_STATES;
2701         if ((sfo.show_counters | sfo.show_time) != 0)
2702                 sfo.flags |= IPFW_CFG_GET_COUNTERS;
2703         if (ipfw_get_config(&co, &sfo, &cfg, &sz) != 0)
2704                 err(EX_OSERR, "retrieving config failed");
2705
2706         error = ipfw_show_config(&co, &sfo, cfg, sz, ac, av);
2707
2708         free(cfg);
2709
2710         if (error != EX_OK)
2711                 exit(error);
2712 }
2713
2714 static int
2715 ipfw_show_config(struct cmdline_opts *co, struct format_opts *fo,
2716     ipfw_cfg_lheader *cfg, size_t sz, int ac, char *av[])
2717 {
2718         caddr_t dynbase;
2719         size_t dynsz;
2720         int rcnt;
2721         int exitval = EX_OK;
2722         int lac;
2723         char **lav;
2724         char *endptr;
2725         size_t readsz;
2726         struct buf_pr bp;
2727         ipfw_obj_ctlv *ctlv, *tstate;
2728         ipfw_obj_tlv *rbase;
2729
2730         /*
2731          * Handle tablenames TLV first, if any
2732          */
2733         tstate = NULL;
2734         rbase = NULL;
2735         dynbase = NULL;
2736         dynsz = 0;
2737         readsz = sizeof(*cfg);
2738         rcnt = 0;
2739
2740         fo->set_mask = cfg->set_mask;
2741
2742         ctlv = (ipfw_obj_ctlv *)(cfg + 1);
2743
2744         if (cfg->flags & IPFW_CFG_GET_STATIC) {
2745                 /* We've requested static rules */
2746                 if (ctlv->head.type == IPFW_TLV_TBLNAME_LIST) {
2747                         object_sort_ctlv(ctlv);
2748                         fo->tstate = ctlv;
2749                         readsz += ctlv->head.length;
2750                         ctlv = (ipfw_obj_ctlv *)((caddr_t)ctlv +
2751                             ctlv->head.length);
2752                 }
2753
2754                 if (ctlv->head.type == IPFW_TLV_RULE_LIST) {
2755                         rbase = (ipfw_obj_tlv *)(ctlv + 1);
2756                         rcnt = ctlv->count;
2757                         readsz += ctlv->head.length;
2758                         ctlv = (ipfw_obj_ctlv *)((caddr_t)ctlv +
2759                             ctlv->head.length);
2760                 }
2761         }
2762
2763         if ((cfg->flags & IPFW_CFG_GET_STATES) && (readsz != sz))  {
2764                 /* We may have some dynamic states */
2765                 dynsz = sz - readsz;
2766                 /* Skip empty header */
2767                 if (dynsz != sizeof(ipfw_obj_ctlv))
2768                         dynbase = (caddr_t)ctlv;
2769                 else
2770                         dynsz = 0;
2771         }
2772
2773         prepare_format_opts(co, fo, rbase, rcnt, dynbase, dynsz);
2774         bp_alloc(&bp, 4096);
2775
2776         /* if no rule numbers were specified, list all rules */
2777         if (ac == 0) {
2778                 fo->first = 0;
2779                 fo->last = IPFW_DEFAULT_RULE;
2780                 list_static_range(co, fo, &bp, rbase, rcnt);
2781
2782                 if (co->do_dynamic && dynsz > 0) {
2783                         printf("## Dynamic rules (%d %zu):\n", fo->dcnt, dynsz);
2784                         list_dyn_range(co, fo, &bp, dynbase, dynsz);
2785                 }
2786
2787                 bp_free(&bp);
2788                 return (EX_OK);
2789         }
2790
2791         /* display specific rules requested on command line */
2792         for (lac = ac, lav = av; lac != 0; lac--) {
2793                 /* convert command line rule # */
2794                 fo->last = fo->first = strtoul(*lav++, &endptr, 10);
2795                 if (*endptr == '-')
2796                         fo->last = strtoul(endptr + 1, &endptr, 10);
2797                 if (*endptr) {
2798                         exitval = EX_USAGE;
2799                         warnx("invalid rule number: %s", *(lav - 1));
2800                         continue;
2801                 }
2802
2803                 if (list_static_range(co, fo, &bp, rbase, rcnt) == 0) {
2804                         /* give precedence to other error(s) */
2805                         if (exitval == EX_OK)
2806                                 exitval = EX_UNAVAILABLE;
2807                         if (fo->first == fo->last)
2808                                 warnx("rule %u does not exist", fo->first);
2809                         else
2810                                 warnx("no rules in range %u-%u",
2811                                     fo->first, fo->last);
2812                 }
2813         }
2814
2815         if (co->do_dynamic && dynsz > 0) {
2816                 printf("## Dynamic rules:\n");
2817                 for (lac = ac, lav = av; lac != 0; lac--) {
2818                         fo->last = fo->first = strtoul(*lav++, &endptr, 10);
2819                         if (*endptr == '-')
2820                                 fo->last = strtoul(endptr+1, &endptr, 10);
2821                         if (*endptr)
2822                                 /* already warned */
2823                                 continue;
2824                         list_dyn_range(co, fo, &bp, dynbase, dynsz);
2825                 }
2826         }
2827
2828         bp_free(&bp);
2829         return (exitval);
2830 }
2831
2832
2833 /*
2834  * Retrieves current ipfw configuration of given type
2835  * and stores its pointer to @pcfg.
2836  *
2837  * Caller is responsible for freeing @pcfg.
2838  *
2839  * Returns 0 on success.
2840  */
2841
2842 static int
2843 ipfw_get_config(struct cmdline_opts *co, struct format_opts *fo,
2844     ipfw_cfg_lheader **pcfg, size_t *psize)
2845 {
2846         ipfw_cfg_lheader *cfg;
2847         size_t sz;
2848         int i;
2849
2850
2851         if (co->test_only != 0) {
2852                 fprintf(stderr, "Testing only, list disabled\n");
2853                 return (0);
2854         }
2855
2856         /* Start with some data size */
2857         sz = 4096;
2858         cfg = NULL;
2859
2860         for (i = 0; i < 16; i++) {
2861                 if (cfg != NULL)
2862                         free(cfg);
2863                 if ((cfg = calloc(1, sz)) == NULL)
2864                         return (ENOMEM);
2865
2866                 cfg->flags = fo->flags;
2867                 cfg->start_rule = fo->first;
2868                 cfg->end_rule = fo->last;
2869
2870                 if (do_get3(IP_FW_XGET, &cfg->opheader, &sz) != 0) {
2871                         if (errno != ENOMEM) {
2872                                 free(cfg);
2873                                 return (errno);
2874                         }
2875
2876                         /* Buffer size is not enough. Try to increase */
2877                         sz = sz * 2;
2878                         if (sz < cfg->size)
2879                                 sz = cfg->size;
2880                         continue;
2881                 }
2882
2883                 *pcfg = cfg;
2884                 *psize = sz;
2885                 return (0);
2886         }
2887
2888         free(cfg);
2889         return (ENOMEM);
2890 }
2891
2892 static int
2893 lookup_host (char *host, struct in_addr *ipaddr)
2894 {
2895         struct hostent *he;
2896
2897         if (!inet_aton(host, ipaddr)) {
2898                 if ((he = gethostbyname(host)) == NULL)
2899                         return(-1);
2900                 *ipaddr = *(struct in_addr *)he->h_addr_list[0];
2901         }
2902         return(0);
2903 }
2904
2905 struct tidx {
2906         ipfw_obj_ntlv *idx;
2907         uint32_t count;
2908         uint32_t size;
2909         uint16_t counter;
2910         uint8_t set;
2911 };
2912
2913 int
2914 ipfw_check_object_name(const char *name)
2915 {
2916         int c, i, l;
2917
2918         /*
2919          * Check that name is null-terminated and contains
2920          * valid symbols only. Valid mask is:
2921          * [a-zA-Z0-9\-_\.]{1,63}
2922          */
2923         l = strlen(name);
2924         if (l == 0 || l >= 64)
2925                 return (EINVAL);
2926         for (i = 0; i < l; i++) {
2927                 c = name[i];
2928                 if (isalpha(c) || isdigit(c) || c == '_' ||
2929                     c == '-' || c == '.')
2930                         continue;
2931                 return (EINVAL);
2932         }
2933         return (0);
2934 }
2935
2936 static char *default_state_name = "default";
2937 static int
2938 state_check_name(const char *name)
2939 {
2940
2941         if (ipfw_check_object_name(name) != 0)
2942                 return (EINVAL);
2943         if (strcmp(name, "any") == 0)
2944                 return (EINVAL);
2945         return (0);
2946 }
2947
2948 static int
2949 eaction_check_name(const char *name)
2950 {
2951
2952         if (ipfw_check_object_name(name) != 0)
2953                 return (EINVAL);
2954         /* Restrict some 'special' names */
2955         if (match_token(rule_actions, name) != -1 &&
2956             match_token(rule_action_params, name) != -1)
2957                 return (EINVAL);
2958         return (0);
2959 }
2960
2961 static uint16_t
2962 pack_object(struct tidx *tstate, char *name, int otype)
2963 {
2964         int i;
2965         ipfw_obj_ntlv *ntlv;
2966
2967         for (i = 0; i < tstate->count; i++) {
2968                 if (strcmp(tstate->idx[i].name, name) != 0)
2969                         continue;
2970                 if (tstate->idx[i].set != tstate->set)
2971                         continue;
2972                 if (tstate->idx[i].head.type != otype)
2973                         continue;
2974
2975                 return (tstate->idx[i].idx);
2976         }
2977
2978         if (tstate->count + 1 > tstate->size) {
2979                 tstate->size += 4;
2980                 tstate->idx = realloc(tstate->idx, tstate->size *
2981                     sizeof(ipfw_obj_ntlv));
2982                 if (tstate->idx == NULL)
2983                         return (0);
2984         }
2985
2986         ntlv = &tstate->idx[i];
2987         memset(ntlv, 0, sizeof(ipfw_obj_ntlv));
2988         strlcpy(ntlv->name, name, sizeof(ntlv->name));
2989         ntlv->head.type = otype;
2990         ntlv->head.length = sizeof(ipfw_obj_ntlv);
2991         ntlv->set = tstate->set;
2992         ntlv->idx = ++tstate->counter;
2993         tstate->count++;
2994
2995         return (ntlv->idx);
2996 }
2997
2998 static uint16_t
2999 pack_table(struct tidx *tstate, char *name)
3000 {
3001
3002         if (table_check_name(name) != 0)
3003                 return (0);
3004
3005         return (pack_object(tstate, name, IPFW_TLV_TBL_NAME));
3006 }
3007
3008 void
3009 fill_table(struct _ipfw_insn *cmd, char *av, uint8_t opcode,
3010     struct tidx *tstate)
3011 {
3012         uint32_t *d = ((ipfw_insn_u32 *)cmd)->d;
3013         uint16_t uidx;
3014         char *p;
3015
3016         if ((p = strchr(av + 6, ')')) == NULL)
3017                 errx(EX_DATAERR, "forgotten parenthesis: '%s'", av);
3018         *p = '\0';
3019         p = strchr(av + 6, ',');
3020         if (p)
3021                 *p++ = '\0';
3022
3023         if ((uidx = pack_table(tstate, av + 6)) == 0)
3024                 errx(EX_DATAERR, "Invalid table name: %s", av + 6);
3025
3026         cmd->opcode = opcode;
3027         cmd->arg1 = uidx;
3028         if (p) {
3029                 cmd->len |= F_INSN_SIZE(ipfw_insn_u32);
3030                 d[0] = strtoul(p, NULL, 0);
3031         } else
3032                 cmd->len |= F_INSN_SIZE(ipfw_insn);
3033 }
3034
3035
3036 /*
3037  * fills the addr and mask fields in the instruction as appropriate from av.
3038  * Update length as appropriate.
3039  * The following formats are allowed:
3040  *      me      returns O_IP_*_ME
3041  *      1.2.3.4         single IP address
3042  *      1.2.3.4:5.6.7.8 address:mask
3043  *      1.2.3.4/24      address/mask
3044  *      1.2.3.4/26{1,6,5,4,23}  set of addresses in a subnet
3045  * We can have multiple comma-separated address/mask entries.
3046  */
3047 static void
3048 fill_ip(ipfw_insn_ip *cmd, char *av, int cblen, struct tidx *tstate)
3049 {
3050         int len = 0;
3051         uint32_t *d = ((ipfw_insn_u32 *)cmd)->d;
3052
3053         cmd->o.len &= ~F_LEN_MASK;      /* zero len */
3054
3055         if (_substrcmp(av, "any") == 0)
3056                 return;
3057
3058         if (_substrcmp(av, "me") == 0) {
3059                 cmd->o.len |= F_INSN_SIZE(ipfw_insn);
3060                 return;
3061         }
3062
3063         if (strncmp(av, "table(", 6) == 0) {
3064                 fill_table(&cmd->o, av, O_IP_DST_LOOKUP, tstate);
3065                 return;
3066         }
3067
3068     while (av) {
3069         /*
3070          * After the address we can have '/' or ':' indicating a mask,
3071          * ',' indicating another address follows, '{' indicating a
3072          * set of addresses of unspecified size.
3073          */
3074         char *t = NULL, *p = strpbrk(av, "/:,{");
3075         int masklen;
3076         char md, nd = '\0';
3077
3078         CHECK_LENGTH(cblen, F_INSN_SIZE(ipfw_insn) + 2 + len);
3079
3080         if (p) {
3081                 md = *p;
3082                 *p++ = '\0';
3083                 if ((t = strpbrk(p, ",{")) != NULL) {
3084                         nd = *t;
3085                         *t = '\0';
3086                 }
3087         } else
3088                 md = '\0';
3089
3090         if (lookup_host(av, (struct in_addr *)&d[0]) != 0)
3091                 errx(EX_NOHOST, "hostname ``%s'' unknown", av);
3092         switch (md) {
3093         case ':':
3094                 if (!inet_aton(p, (struct in_addr *)&d[1]))
3095                         errx(EX_DATAERR, "bad netmask ``%s''", p);
3096                 break;
3097         case '/':
3098                 masklen = atoi(p);
3099                 if (masklen == 0)
3100                         d[1] = htonl(0U);       /* mask */
3101                 else if (masklen > 32)
3102                         errx(EX_DATAERR, "bad width ``%s''", p);
3103                 else
3104                         d[1] = htonl(~0U << (32 - masklen));
3105                 break;
3106         case '{':       /* no mask, assume /24 and put back the '{' */
3107                 d[1] = htonl(~0U << (32 - 24));
3108                 *(--p) = md;
3109                 break;
3110
3111         case ',':       /* single address plus continuation */
3112                 *(--p) = md;
3113                 /* FALLTHROUGH */
3114         case 0:         /* initialization value */
3115         default:
3116                 d[1] = htonl(~0U);      /* force /32 */
3117                 break;
3118         }
3119         d[0] &= d[1];           /* mask base address with mask */
3120         if (t)
3121                 *t = nd;
3122         /* find next separator */
3123         if (p)
3124                 p = strpbrk(p, ",{");
3125         if (p && *p == '{') {
3126                 /*
3127                  * We have a set of addresses. They are stored as follows:
3128                  *   arg1       is the set size (powers of 2, 2..256)
3129                  *   addr       is the base address IN HOST FORMAT
3130                  *   mask..     is an array of arg1 bits (rounded up to
3131                  *              the next multiple of 32) with bits set
3132                  *              for each host in the map.
3133                  */
3134                 uint32_t *map = (uint32_t *)&cmd->mask;
3135                 int low, high;
3136                 int i = contigmask((uint8_t *)&(d[1]), 32);
3137
3138                 if (len > 0)
3139                         errx(EX_DATAERR, "address set cannot be in a list");
3140                 if (i < 24 || i > 31)
3141                         errx(EX_DATAERR, "invalid set with mask %d\n", i);
3142                 cmd->o.arg1 = 1<<(32-i);        /* map length           */
3143                 d[0] = ntohl(d[0]);             /* base addr in host format */
3144                 cmd->o.opcode = O_IP_DST_SET;   /* default */
3145                 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32) + (cmd->o.arg1+31)/32;
3146                 for (i = 0; i < (cmd->o.arg1+31)/32 ; i++)
3147                         map[i] = 0;     /* clear map */
3148
3149                 av = p + 1;
3150                 low = d[0] & 0xff;
3151                 high = low + cmd->o.arg1 - 1;
3152                 /*
3153                  * Here, i stores the previous value when we specify a range
3154                  * of addresses within a mask, e.g. 45-63. i = -1 means we
3155                  * have no previous value.
3156                  */
3157                 i = -1; /* previous value in a range */
3158                 while (isdigit(*av)) {
3159                         char *s;
3160                         int a = strtol(av, &s, 0);
3161
3162                         if (s == av) { /* no parameter */
3163                             if (*av != '}')
3164                                 errx(EX_DATAERR, "set not closed\n");
3165                             if (i != -1)
3166                                 errx(EX_DATAERR, "incomplete range %d-", i);
3167                             break;
3168                         }
3169                         if (a < low || a > high)
3170                             errx(EX_DATAERR, "addr %d out of range [%d-%d]\n",
3171                                 a, low, high);
3172                         a -= low;
3173                         if (i == -1)    /* no previous in range */
3174                             i = a;
3175                         else {          /* check that range is valid */
3176                             if (i > a)
3177                                 errx(EX_DATAERR, "invalid range %d-%d",
3178                                         i+low, a+low);
3179                             if (*s == '-')
3180                                 errx(EX_DATAERR, "double '-' in range");
3181                         }
3182                         for (; i <= a; i++)
3183                             map[i/32] |= 1<<(i & 31);
3184                         i = -1;
3185                         if (*s == '-')
3186                             i = a;
3187                         else if (*s == '}')
3188                             break;
3189                         av = s+1;
3190                 }
3191                 return;
3192         }
3193         av = p;
3194         if (av)                 /* then *av must be a ',' */
3195                 av++;
3196
3197         /* Check this entry */
3198         if (d[1] == 0) { /* "any", specified as x.x.x.x/0 */
3199                 /*
3200                  * 'any' turns the entire list into a NOP.
3201                  * 'not any' never matches, so it is removed from the
3202                  * list unless it is the only item, in which case we
3203                  * report an error.
3204                  */
3205                 if (cmd->o.len & F_NOT) {       /* "not any" never matches */
3206                         if (av == NULL && len == 0) /* only this entry */
3207                                 errx(EX_DATAERR, "not any never matches");
3208                 }
3209                 /* else do nothing and skip this entry */
3210                 return;
3211         }
3212         /* A single IP can be stored in an optimized format */
3213         if (d[1] == (uint32_t)~0 && av == NULL && len == 0) {
3214                 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32);
3215                 return;
3216         }
3217         len += 2;       /* two words... */
3218         d += 2;
3219     } /* end while */
3220     if (len + 1 > F_LEN_MASK)
3221         errx(EX_DATAERR, "address list too long");
3222     cmd->o.len |= len+1;
3223 }
3224
3225
3226 /* n2mask sets n bits of the mask */
3227 void
3228 n2mask(struct in6_addr *mask, int n)
3229 {
3230         static int      minimask[9] =
3231             { 0x00, 0x80, 0xc0, 0xe0, 0xf0, 0xf8, 0xfc, 0xfe, 0xff };
3232         u_char          *p;
3233
3234         memset(mask, 0, sizeof(struct in6_addr));
3235         p = (u_char *) mask;
3236         for (; n > 0; p++, n -= 8) {
3237                 if (n >= 8)
3238                         *p = 0xff;
3239                 else
3240                         *p = minimask[n];
3241         }
3242         return;
3243 }
3244
3245 static void
3246 fill_flags_cmd(ipfw_insn *cmd, enum ipfw_opcodes opcode,
3247         struct _s_x *flags, char *p)
3248 {
3249         char *e;
3250         uint32_t set = 0, clear = 0;
3251
3252         if (fill_flags(flags, p, &e, &set, &clear) != 0)
3253                 errx(EX_DATAERR, "invalid flag %s", e);
3254
3255         cmd->opcode = opcode;
3256         cmd->len =  (cmd->len & (F_NOT | F_OR)) | 1;
3257         cmd->arg1 = (set & 0xff) | ( (clear & 0xff) << 8);
3258 }
3259
3260
3261 void
3262 ipfw_delete(char *av[])
3263 {
3264         ipfw_range_tlv rt;
3265         char *sep;
3266         int i, j;
3267         int exitval = EX_OK;
3268         int do_set = 0;
3269
3270         av++;
3271         NEED1("missing rule specification");
3272         if ( *av && _substrcmp(*av, "set") == 0) {
3273                 /* Do not allow using the following syntax:
3274                  *      ipfw set N delete set M
3275                  */
3276                 if (co.use_set)
3277                         errx(EX_DATAERR, "invalid syntax");
3278                 do_set = 1;     /* delete set */
3279                 av++;
3280         }
3281
3282         /* Rule number */
3283         while (*av && isdigit(**av)) {
3284                 i = strtol(*av, &sep, 10);
3285                 j = i;
3286                 if (*sep== '-')
3287                         j = strtol(sep + 1, NULL, 10);
3288                 av++;
3289                 if (co.do_nat) {
3290                         exitval = do_cmd(IP_FW_NAT_DEL, &i, sizeof i);
3291                         if (exitval) {
3292                                 exitval = EX_UNAVAILABLE;
3293                                 if (co.do_quiet)
3294                                         continue;
3295                                 warn("nat %u not available", i);
3296                         }
3297                 } else if (co.do_pipe) {
3298                         exitval = ipfw_delete_pipe(co.do_pipe, i);
3299                 } else {
3300                         memset(&rt, 0, sizeof(rt));
3301                         if (do_set != 0) {
3302                                 rt.set = i & 31;
3303                                 rt.flags = IPFW_RCFLAG_SET;
3304                         } else {
3305                                 rt.start_rule = i & 0xffff;
3306                                 rt.end_rule = j & 0xffff;
3307                                 if (rt.start_rule == 0 && rt.end_rule == 0)
3308                                         rt.flags |= IPFW_RCFLAG_ALL;
3309                                 else
3310                                         rt.flags |= IPFW_RCFLAG_RANGE;
3311                                 if (co.use_set != 0) {
3312                                         rt.set = co.use_set - 1;
3313                                         rt.flags |= IPFW_RCFLAG_SET;
3314                                 }
3315                         }
3316                         i = do_range_cmd(IP_FW_XDEL, &rt);
3317                         if (i != 0) {
3318                                 exitval = EX_UNAVAILABLE;
3319                                 if (co.do_quiet)
3320                                         continue;
3321                                 warn("rule %u: setsockopt(IP_FW_XDEL)",
3322                                     rt.start_rule);
3323                         } else if (rt.new_set == 0 && do_set == 0) {
3324                                 exitval = EX_UNAVAILABLE;
3325                                 if (co.do_quiet)
3326                                         continue;
3327                                 if (rt.start_rule != rt.end_rule)
3328                                         warnx("no rules rules in %u-%u range",
3329                                             rt.start_rule, rt.end_rule);
3330                                 else
3331                                         warnx("rule %u not found",
3332                                             rt.start_rule);
3333                         }
3334                 }
3335         }
3336         if (exitval != EX_OK && co.do_force == 0)
3337                 exit(exitval);
3338 }
3339
3340
3341 /*
3342  * fill the interface structure. We do not check the name as we can
3343  * create interfaces dynamically, so checking them at insert time
3344  * makes relatively little sense.
3345  * Interface names containing '*', '?', or '[' are assumed to be shell
3346  * patterns which match interfaces.
3347  */
3348 static void
3349 fill_iface(ipfw_insn_if *cmd, char *arg, int cblen, struct tidx *tstate)
3350 {
3351         char *p;
3352         uint16_t uidx;
3353
3354         cmd->name[0] = '\0';
3355         cmd->o.len |= F_INSN_SIZE(ipfw_insn_if);
3356
3357         CHECK_CMDLEN;
3358
3359         /* Parse the interface or address */
3360         if (strcmp(arg, "any") == 0)
3361                 cmd->o.len = 0;         /* effectively ignore this command */
3362         else if (strncmp(arg, "table(", 6) == 0) {
3363                 if ((p = strchr(arg + 6, ')')) == NULL)
3364                         errx(EX_DATAERR, "forgotten parenthesis: '%s'", arg);
3365                 *p = '\0';
3366                 p = strchr(arg + 6, ',');
3367                 if (p)
3368                         *p++ = '\0';
3369                 if ((uidx = pack_table(tstate, arg + 6)) == 0)
3370                         errx(EX_DATAERR, "Invalid table name: %s", arg + 6);
3371
3372                 cmd->name[0] = '\1'; /* Special value indicating table */
3373                 cmd->p.kidx = uidx;
3374         } else if (!isdigit(*arg)) {
3375                 strlcpy(cmd->name, arg, sizeof(cmd->name));
3376                 cmd->p.glob = strpbrk(arg, "*?[") != NULL ? 1 : 0;
3377         } else if (!inet_aton(arg, &cmd->p.ip))
3378                 errx(EX_DATAERR, "bad ip address ``%s''", arg);
3379 }
3380
3381 static void
3382 get_mac_addr_mask(const char *p, uint8_t *addr, uint8_t *mask)
3383 {
3384         int i;
3385         size_t l;
3386         char *ap, *ptr, *optr;
3387         struct ether_addr *mac;
3388         const char *macset = "0123456789abcdefABCDEF:";
3389
3390         if (strcmp(p, "any") == 0) {
3391                 for (i = 0; i < ETHER_ADDR_LEN; i++)
3392                         addr[i] = mask[i] = 0;
3393                 return;
3394         }
3395
3396         optr = ptr = strdup(p);
3397         if ((ap = strsep(&ptr, "&/")) != NULL && *ap != 0) {
3398                 l = strlen(ap);
3399                 if (strspn(ap, macset) != l || (mac = ether_aton(ap)) == NULL)
3400                         errx(EX_DATAERR, "Incorrect MAC address");
3401                 bcopy(mac, addr, ETHER_ADDR_LEN);
3402         } else
3403                 errx(EX_DATAERR, "Incorrect MAC address");
3404
3405         if (ptr != NULL) { /* we have mask? */
3406                 if (p[ptr - optr - 1] == '/') { /* mask len */
3407                         long ml = strtol(ptr, &ap, 10);
3408                         if (*ap != 0 || ml > ETHER_ADDR_LEN * 8 || ml < 0)
3409                                 errx(EX_DATAERR, "Incorrect mask length");
3410                         for (i = 0; ml > 0 && i < ETHER_ADDR_LEN; ml -= 8, i++)
3411                                 mask[i] = (ml >= 8) ? 0xff: (~0) << (8 - ml);
3412                 } else { /* mask */
3413                         l = strlen(ptr);
3414                         if (strspn(ptr, macset) != l ||
3415                             (mac = ether_aton(ptr)) == NULL)
3416                                 errx(EX_DATAERR, "Incorrect mask");
3417                         bcopy(mac, mask, ETHER_ADDR_LEN);
3418                 }
3419         } else { /* default mask: ff:ff:ff:ff:ff:ff */
3420                 for (i = 0; i < ETHER_ADDR_LEN; i++)
3421                         mask[i] = 0xff;
3422         }
3423         for (i = 0; i < ETHER_ADDR_LEN; i++)
3424                 addr[i] &= mask[i];
3425
3426         free(optr);
3427 }
3428
3429 /*
3430  * helper function, updates the pointer to cmd with the length
3431  * of the current command, and also cleans up the first word of
3432  * the new command in case it has been clobbered before.
3433  */
3434 static ipfw_insn *
3435 next_cmd(ipfw_insn *cmd, int *len)
3436 {
3437         *len -= F_LEN(cmd);
3438         CHECK_LENGTH(*len, 0);
3439         cmd += F_LEN(cmd);
3440         bzero(cmd, sizeof(*cmd));
3441         return cmd;
3442 }
3443
3444 /*
3445  * Takes arguments and copies them into a comment
3446  */
3447 static void
3448 fill_comment(ipfw_insn *cmd, char **av, int cblen)
3449 {
3450         int i, l;
3451         char *p = (char *)(cmd + 1);
3452
3453         cmd->opcode = O_NOP;
3454         cmd->len =  (cmd->len & (F_NOT | F_OR));
3455
3456         /* Compute length of comment string. */
3457         for (i = 0, l = 0; av[i] != NULL; i++)
3458                 l += strlen(av[i]) + 1;
3459         if (l == 0)
3460                 return;
3461         if (l > 84)
3462                 errx(EX_DATAERR,
3463                     "comment too long (max 80 chars)");
3464         l = 1 + (l+3)/4;
3465         cmd->len =  (cmd->len & (F_NOT | F_OR)) | l;
3466         CHECK_CMDLEN;
3467
3468         for (i = 0; av[i] != NULL; i++) {
3469                 strcpy(p, av[i]);
3470                 p += strlen(av[i]);
3471                 *p++ = ' ';
3472         }
3473         *(--p) = '\0';
3474 }
3475
3476 /*
3477  * A function to fill simple commands of size 1.
3478  * Existing flags are preserved.
3479  */
3480 static void
3481 fill_cmd(ipfw_insn *cmd, enum ipfw_opcodes opcode, int flags, uint16_t arg)
3482 {
3483         cmd->opcode = opcode;
3484         cmd->len =  ((cmd->len | flags) & (F_NOT | F_OR)) | 1;
3485         cmd->arg1 = arg;
3486 }
3487
3488 /*
3489  * Fetch and add the MAC address and type, with masks. This generates one or
3490  * two microinstructions, and returns the pointer to the last one.
3491  */
3492 static ipfw_insn *
3493 add_mac(ipfw_insn *cmd, char *av[], int cblen)
3494 {
3495         ipfw_insn_mac *mac;
3496
3497         if ( ( av[0] == NULL ) || ( av[1] == NULL ) )
3498                 errx(EX_DATAERR, "MAC dst src");
3499
3500         cmd->opcode = O_MACADDR2;
3501         cmd->len = (cmd->len & (F_NOT | F_OR)) | F_INSN_SIZE(ipfw_insn_mac);
3502         CHECK_CMDLEN;
3503
3504         mac = (ipfw_insn_mac *)cmd;
3505         get_mac_addr_mask(av[0], mac->addr, mac->mask); /* dst */
3506         get_mac_addr_mask(av[1], &(mac->addr[ETHER_ADDR_LEN]),
3507             &(mac->mask[ETHER_ADDR_LEN])); /* src */
3508         return cmd;
3509 }
3510
3511 static ipfw_insn *
3512 add_mactype(ipfw_insn *cmd, char *av, int cblen)
3513 {
3514         if (!av)
3515                 errx(EX_DATAERR, "missing MAC type");
3516         if (strcmp(av, "any") != 0) { /* we have a non-null type */
3517                 fill_newports((ipfw_insn_u16 *)cmd, av, IPPROTO_ETHERTYPE,
3518                     cblen);
3519                 cmd->opcode = O_MAC_TYPE;
3520                 return cmd;
3521         } else
3522                 return NULL;
3523 }
3524
3525 static ipfw_insn *
3526 add_proto0(ipfw_insn *cmd, char *av, u_char *protop)
3527 {
3528         struct protoent *pe;
3529         char *ep;
3530         int proto;
3531
3532         proto = strtol(av, &ep, 10);
3533         if (*ep != '\0' || proto <= 0) {
3534                 if ((pe = getprotobyname(av)) == NULL)
3535                         return NULL;
3536                 proto = pe->p_proto;
3537         }
3538
3539         fill_cmd(cmd, O_PROTO, 0, proto);
3540         *protop = proto;
3541         return cmd;
3542 }
3543
3544 static ipfw_insn *
3545 add_proto(ipfw_insn *cmd, char *av, u_char *protop)
3546 {
3547         u_char proto = IPPROTO_IP;
3548
3549         if (_substrcmp(av, "all") == 0 || strcmp(av, "ip") == 0)
3550                 ; /* do not set O_IP4 nor O_IP6 */
3551         else if (strcmp(av, "ip4") == 0)
3552                 /* explicit "just IPv4" rule */
3553                 fill_cmd(cmd, O_IP4, 0, 0);
3554         else if (strcmp(av, "ip6") == 0) {
3555                 /* explicit "just IPv6" rule */
3556                 proto = IPPROTO_IPV6;
3557                 fill_cmd(cmd, O_IP6, 0, 0);
3558         } else
3559                 return add_proto0(cmd, av, protop);
3560
3561         *protop = proto;
3562         return cmd;
3563 }
3564
3565 static ipfw_insn *
3566 add_proto_compat(ipfw_insn *cmd, char *av, u_char *protop)
3567 {
3568         u_char proto = IPPROTO_IP;
3569
3570         if (_substrcmp(av, "all") == 0 || strcmp(av, "ip") == 0)
3571                 ; /* do not set O_IP4 nor O_IP6 */
3572         else if (strcmp(av, "ipv4") == 0 || strcmp(av, "ip4") == 0)
3573                 /* explicit "just IPv4" rule */
3574                 fill_cmd(cmd, O_IP4, 0, 0);
3575         else if (strcmp(av, "ipv6") == 0 || strcmp(av, "ip6") == 0) {
3576                 /* explicit "just IPv6" rule */
3577                 proto = IPPROTO_IPV6;
3578                 fill_cmd(cmd, O_IP6, 0, 0);
3579         } else
3580                 return add_proto0(cmd, av, protop);
3581
3582         *protop = proto;
3583         return cmd;
3584 }
3585
3586 static ipfw_insn *
3587 add_srcip(ipfw_insn *cmd, char *av, int cblen, struct tidx *tstate)
3588 {
3589         fill_ip((ipfw_insn_ip *)cmd, av, cblen, tstate);
3590         if (cmd->opcode == O_IP_DST_SET)                        /* set */
3591                 cmd->opcode = O_IP_SRC_SET;
3592         else if (cmd->opcode == O_IP_DST_LOOKUP)                /* table */
3593                 cmd->opcode = O_IP_SRC_LOOKUP;
3594         else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn))          /* me */
3595                 cmd->opcode = O_IP_SRC_ME;
3596         else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_u32))      /* one IP */
3597                 cmd->opcode = O_IP_SRC;
3598         else                                                    /* addr/mask */
3599                 cmd->opcode = O_IP_SRC_MASK;
3600         return cmd;
3601 }
3602
3603 static ipfw_insn *
3604 add_dstip(ipfw_insn *cmd, char *av, int cblen, struct tidx *tstate)
3605 {
3606         fill_ip((ipfw_insn_ip *)cmd, av, cblen, tstate);
3607         if (cmd->opcode == O_IP_DST_SET)                        /* set */
3608                 ;
3609         else if (cmd->opcode == O_IP_DST_LOOKUP)                /* table */
3610                 ;
3611         else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn))          /* me */
3612                 cmd->opcode = O_IP_DST_ME;
3613         else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_u32))      /* one IP */
3614                 cmd->opcode = O_IP_DST;
3615         else                                                    /* addr/mask */
3616                 cmd->opcode = O_IP_DST_MASK;
3617         return cmd;
3618 }
3619
3620 static struct _s_x f_reserved_keywords[] = {
3621         { "altq",       TOK_OR },
3622         { "//",         TOK_OR },
3623         { "diverted",   TOK_OR },
3624         { "dst-port",   TOK_OR },
3625         { "src-port",   TOK_OR },
3626         { "established",        TOK_OR },
3627         { "keep-state", TOK_OR },
3628         { "frag",       TOK_OR },
3629         { "icmptypes",  TOK_OR },
3630         { "in",         TOK_OR },
3631         { "out",        TOK_OR },
3632         { "ip6",        TOK_OR },
3633         { "any",        TOK_OR },
3634         { "to",         TOK_OR },
3635         { "via",        TOK_OR },
3636         { "{",          TOK_OR },
3637         { NULL, 0 }     /* terminator */
3638 };
3639
3640 static ipfw_insn *
3641 add_ports(ipfw_insn *cmd, char *av, u_char proto, int opcode, int cblen)
3642 {
3643
3644         if (match_token(f_reserved_keywords, av) != -1)
3645                 return (NULL);
3646
3647         if (fill_newports((ipfw_insn_u16 *)cmd, av, proto, cblen)) {
3648                 /* XXX todo: check that we have a protocol with ports */
3649                 cmd->opcode = opcode;
3650                 return cmd;
3651         }
3652         return NULL;
3653 }
3654
3655 static ipfw_insn *
3656 add_src(ipfw_insn *cmd, char *av, u_char proto, int cblen, struct tidx *tstate)
3657 {
3658         struct in6_addr a;
3659         char *host, *ch, buf[INET6_ADDRSTRLEN];
3660         ipfw_insn *ret = NULL;
3661         int len;
3662
3663         /* Copy first address in set if needed */
3664         if ((ch = strpbrk(av, "/,")) != NULL) {
3665                 len = ch - av;
3666                 strlcpy(buf, av, sizeof(buf));
3667                 if (len < sizeof(buf))
3668                         buf[len] = '\0';
3669                 host = buf;
3670         } else
3671                 host = av;
3672
3673         if (proto == IPPROTO_IPV6  || strcmp(av, "me6") == 0 ||
3674             inet_pton(AF_INET6, host, &a) == 1)
3675                 ret = add_srcip6(cmd, av, cblen, tstate);
3676         /* XXX: should check for IPv4, not !IPv6 */
3677         if (ret == NULL && (proto == IPPROTO_IP || strcmp(av, "me") == 0 ||
3678             inet_pton(AF_INET6, host, &a) != 1))
3679                 ret = add_srcip(cmd, av, cblen, tstate);
3680         if (ret == NULL && strcmp(av, "any") != 0)
3681                 ret = cmd;
3682
3683         return ret;
3684 }
3685
3686 static ipfw_insn *
3687 add_dst(ipfw_insn *cmd, char *av, u_char proto, int cblen, struct tidx *tstate)
3688 {
3689         struct in6_addr a;
3690         char *host, *ch, buf[INET6_ADDRSTRLEN];
3691         ipfw_insn *ret = NULL;
3692         int len;
3693
3694         /* Copy first address in set if needed */
3695         if ((ch = strpbrk(av, "/,")) != NULL) {
3696                 len = ch - av;
3697                 strlcpy(buf, av, sizeof(buf));
3698                 if (len < sizeof(buf))
3699                         buf[len] = '\0';
3700                 host = buf;
3701         } else
3702                 host = av;
3703
3704         if (proto == IPPROTO_IPV6  || strcmp(av, "me6") == 0 ||
3705             inet_pton(AF_INET6, host, &a) == 1)
3706                 ret = add_dstip6(cmd, av, cblen, tstate);
3707         /* XXX: should check for IPv4, not !IPv6 */
3708         if (ret == NULL && (proto == IPPROTO_IP || strcmp(av, "me") == 0 ||
3709             inet_pton(AF_INET6, host, &a) != 1))
3710                 ret = add_dstip(cmd, av, cblen, tstate);
3711         if (ret == NULL && strcmp(av, "any") != 0)
3712                 ret = cmd;
3713
3714         return ret;
3715 }
3716
3717 /*
3718  * Parse arguments and assemble the microinstructions which make up a rule.
3719  * Rules are added into the 'rulebuf' and then copied in the correct order
3720  * into the actual rule.
3721  *
3722  * The syntax for a rule starts with the action, followed by
3723  * optional action parameters, and the various match patterns.
3724  * In the assembled microcode, the first opcode must be an O_PROBE_STATE
3725  * (generated if the rule includes a keep-state option), then the
3726  * various match patterns, log/altq actions, and the actual action.
3727  *
3728  */
3729 void
3730 compile_rule(char *av[], uint32_t *rbuf, int *rbufsize, struct tidx *tstate)
3731 {
3732         /*
3733          * rules are added into the 'rulebuf' and then copied in
3734          * the correct order into the actual rule.
3735          * Some things that need to go out of order (prob, action etc.)
3736          * go into actbuf[].
3737          */
3738         static uint32_t actbuf[255], cmdbuf[255];
3739         int rblen, ablen, cblen;
3740
3741         ipfw_insn *src, *dst, *cmd, *action, *prev=NULL;
3742         ipfw_insn *first_cmd;   /* first match pattern */
3743
3744         struct ip_fw_rule *rule;
3745
3746         /*
3747          * various flags used to record that we entered some fields.
3748          */
3749         ipfw_insn *have_state = NULL;   /* any state-related option */
3750         int have_rstate = 0;
3751         ipfw_insn *have_log = NULL, *have_altq = NULL, *have_tag = NULL;
3752         ipfw_insn *have_skipcmd = NULL;
3753         size_t len;
3754
3755         int i;
3756
3757         int open_par = 0;       /* open parenthesis ( */
3758
3759         /* proto is here because it is used to fetch ports */
3760         u_char proto = IPPROTO_IP;      /* default protocol */
3761
3762         double match_prob = 1; /* match probability, default is always match */
3763
3764         bzero(actbuf, sizeof(actbuf));          /* actions go here */
3765         bzero(cmdbuf, sizeof(cmdbuf));
3766         bzero(rbuf, *rbufsize);
3767
3768         rule = (struct ip_fw_rule *)rbuf;
3769         cmd = (ipfw_insn *)cmdbuf;
3770         action = (ipfw_insn *)actbuf;
3771
3772         rblen = *rbufsize / sizeof(uint32_t);
3773         rblen -= sizeof(struct ip_fw_rule) / sizeof(uint32_t);
3774         ablen = sizeof(actbuf) / sizeof(actbuf[0]);
3775         cblen = sizeof(cmdbuf) / sizeof(cmdbuf[0]);
3776         cblen -= F_INSN_SIZE(ipfw_insn_u32) + 1;
3777
3778 #define CHECK_RBUFLEN(len)      { CHECK_LENGTH(rblen, len); rblen -= len; }
3779 #define CHECK_ACTLEN            CHECK_LENGTH(ablen, action->len)
3780
3781         av++;
3782
3783         /* [rule N]     -- Rule number optional */
3784         if (av[0] && isdigit(**av)) {
3785                 rule->rulenum = atoi(*av);
3786                 av++;
3787         }
3788
3789         /* [set N]      -- set number (0..RESVD_SET), optional */
3790         if (av[0] && av[1] && _substrcmp(*av, "set") == 0) {
3791                 int set = strtoul(av[1], NULL, 10);
3792                 if (set < 0 || set > RESVD_SET)
3793                         errx(EX_DATAERR, "illegal set %s", av[1]);
3794                 rule->set = set;
3795                 tstate->set = set;
3796                 av += 2;
3797         }
3798
3799         /* [prob D]     -- match probability, optional */
3800         if (av[0] && av[1] && _substrcmp(*av, "prob") == 0) {
3801                 match_prob = strtod(av[1], NULL);
3802
3803                 if (match_prob <= 0 || match_prob > 1)
3804                         errx(EX_DATAERR, "illegal match prob. %s", av[1]);
3805                 av += 2;
3806         }
3807
3808         /* action       -- mandatory */
3809         NEED1("missing action");
3810         i = match_token(rule_actions, *av);
3811         av++;
3812         action->len = 1;        /* default */
3813         CHECK_ACTLEN;
3814         switch(i) {
3815         case TOK_CHECKSTATE:
3816                 have_state = action;
3817                 action->opcode = O_CHECK_STATE;
3818                 if (*av == NULL ||
3819                     match_token(rule_options, *av) == TOK_COMMENT) {
3820                         action->arg1 = pack_object(tstate,
3821                             default_state_name, IPFW_TLV_STATE_NAME);
3822                         break;
3823                 }
3824                 if (*av[0] == ':') {
3825                         if (strcmp(*av + 1, "any") == 0)
3826                                 action->arg1 = 0;
3827                         else if (state_check_name(*av + 1) == 0)
3828                                 action->arg1 = pack_object(tstate, *av + 1,
3829                                     IPFW_TLV_STATE_NAME);
3830                         else
3831                                 errx(EX_DATAERR, "Invalid state name %s",
3832                                     *av);
3833                         av++;
3834                         break;
3835                 }
3836                 errx(EX_DATAERR, "Invalid state name %s", *av);
3837                 break;
3838
3839         case TOK_ABORT:
3840                 action->opcode = O_REJECT;
3841                 action->arg1 = ICMP_REJECT_ABORT;
3842                 break;
3843
3844         case TOK_ABORT6:
3845                 action->opcode = O_UNREACH6;
3846                 action->arg1 = ICMP6_UNREACH_ABORT;
3847                 break;
3848
3849         case TOK_ACCEPT:
3850                 action->opcode = O_ACCEPT;
3851                 break;
3852
3853         case TOK_DENY:
3854                 action->opcode = O_DENY;
3855                 action->arg1 = 0;
3856                 break;
3857
3858         case TOK_REJECT:
3859                 action->opcode = O_REJECT;
3860                 action->arg1 = ICMP_UNREACH_HOST;
3861                 break;
3862
3863         case TOK_RESET:
3864                 action->opcode = O_REJECT;
3865                 action->arg1 = ICMP_REJECT_RST;
3866                 break;
3867
3868         case TOK_RESET6:
3869                 action->opcode = O_UNREACH6;
3870                 action->arg1 = ICMP6_UNREACH_RST;
3871                 break;
3872
3873         case TOK_UNREACH:
3874                 action->opcode = O_REJECT;
3875                 NEED1("missing reject code");
3876                 fill_reject_code(&action->arg1, *av);
3877                 av++;
3878                 break;
3879
3880         case TOK_UNREACH6:
3881                 action->opcode = O_UNREACH6;
3882                 NEED1("missing unreach code");
3883                 fill_unreach6_code(&action->arg1, *av);
3884                 av++;
3885                 break;
3886
3887         case TOK_COUNT:
3888                 action->opcode = O_COUNT;
3889                 break;
3890
3891         case TOK_NAT:
3892                 action->opcode = O_NAT;
3893                 action->len = F_INSN_SIZE(ipfw_insn_nat);
3894                 CHECK_ACTLEN;
3895                 if (*av != NULL && _substrcmp(*av, "global") == 0) {
3896                         action->arg1 = IP_FW_NAT44_GLOBAL;
3897                         av++;
3898                         break;
3899                 } else
3900                         goto chkarg;
3901         case TOK_QUEUE:
3902                 action->opcode = O_QUEUE;
3903                 goto chkarg;
3904         case TOK_PIPE:
3905                 action->opcode = O_PIPE;
3906                 goto chkarg;
3907         case TOK_SKIPTO:
3908                 action->opcode = O_SKIPTO;
3909                 goto chkarg;
3910         case TOK_NETGRAPH:
3911                 action->opcode = O_NETGRAPH;
3912                 goto chkarg;
3913         case TOK_NGTEE:
3914                 action->opcode = O_NGTEE;
3915                 goto chkarg;
3916         case TOK_DIVERT:
3917                 action->opcode = O_DIVERT;
3918                 goto chkarg;
3919         case TOK_TEE:
3920                 action->opcode = O_TEE;
3921                 goto chkarg;
3922         case TOK_CALL:
3923                 action->opcode = O_CALLRETURN;
3924 chkarg:
3925                 if (!av[0])
3926                         errx(EX_USAGE, "missing argument for %s", *(av - 1));
3927                 if (isdigit(**av)) {
3928                         action->arg1 = strtoul(*av, NULL, 10);
3929                         if (action->arg1 <= 0 || action->arg1 >= IP_FW_TABLEARG)
3930                                 errx(EX_DATAERR, "illegal argument for %s",
3931                                     *(av - 1));
3932                 } else if (_substrcmp(*av, "tablearg") == 0) {
3933                         action->arg1 = IP_FW_TARG;
3934                 } else if (i == TOK_DIVERT || i == TOK_TEE) {
3935                         struct servent *s;
3936                         setservent(1);
3937                         s = getservbyname(av[0], "divert");
3938                         if (s != NULL)
3939                                 action->arg1 = ntohs(s->s_port);
3940                         else
3941                                 errx(EX_DATAERR, "illegal divert/tee port");
3942                 } else
3943                         errx(EX_DATAERR, "illegal argument for %s", *(av - 1));
3944                 av++;
3945                 break;
3946
3947         case TOK_FORWARD: {
3948                 /*
3949                  * Locate the address-port separator (':' or ',').
3950                  * Could be one of the following:
3951                  *      hostname:port
3952                  *      IPv4 a.b.c.d,port
3953                  *      IPv4 a.b.c.d:port
3954                  *      IPv6 w:x:y::z,port
3955                  * The ':' can only be used with hostname and IPv4 address.
3956                  * XXX-BZ Should we also support [w:x:y::z]:port?
3957                  */
3958                 struct sockaddr_storage result;
3959                 struct addrinfo *res;
3960                 char *s, *end;
3961                 int family;
3962                 u_short port_number;
3963
3964                 NEED1("missing forward address[:port]");
3965
3966                 /*
3967                  * locate the address-port separator (':' or ',')
3968                  */
3969                 s = strchr(*av, ',');
3970                 if (s == NULL) {
3971                         /* Distinguish between IPv4:port and IPv6 cases. */
3972                         s = strchr(*av, ':');
3973                         if (s && strchr(s+1, ':'))
3974                                 s = NULL; /* no port */
3975                 }
3976
3977                 port_number = 0;
3978                 if (s != NULL) {
3979                         /* Terminate host portion and set s to start of port. */
3980                         *(s++) = '\0';
3981                         i = strtoport(s, &end, 0 /* base */, 0 /* proto */);
3982                         if (s == end)
3983                                 errx(EX_DATAERR,
3984                                     "illegal forwarding port ``%s''", s);
3985                         port_number = (u_short)i;
3986                 }
3987
3988                 if (_substrcmp(*av, "tablearg") == 0) {
3989                         family = PF_INET;
3990                         ((struct sockaddr_in*)&result)->sin_addr.s_addr =
3991                             INADDR_ANY;
3992                 } else {
3993                         /*
3994                          * Resolve the host name or address to a family and a
3995                          * network representation of the address.
3996                          */
3997                         if (getaddrinfo(*av, NULL, NULL, &res))
3998                                 errx(EX_DATAERR, NULL);
3999                         /* Just use the first host in the answer. */
4000                         family = res->ai_family;
4001                         memcpy(&result, res->ai_addr, res->ai_addrlen);
4002                         freeaddrinfo(res);
4003                 }
4004
4005                 if (family == PF_INET) {
4006                         ipfw_insn_sa *p = (ipfw_insn_sa *)action;
4007
4008                         action->opcode = O_FORWARD_IP;
4009                         action->len = F_INSN_SIZE(ipfw_insn_sa);
4010                         CHECK_ACTLEN;
4011
4012                         /*
4013                          * In the kernel we assume AF_INET and use only
4014                          * sin_port and sin_addr. Remember to set sin_len as
4015                          * the routing code seems to use it too.
4016                          */
4017                         p->sa.sin_len = sizeof(struct sockaddr_in);
4018                         p->sa.sin_family = AF_INET;
4019                         p->sa.sin_port = port_number;
4020                         p->sa.sin_addr.s_addr =
4021                              ((struct sockaddr_in *)&result)->sin_addr.s_addr;
4022                 } else if (family == PF_INET6) {
4023                         ipfw_insn_sa6 *p = (ipfw_insn_sa6 *)action;
4024
4025                         action->opcode = O_FORWARD_IP6;
4026                         action->len = F_INSN_SIZE(ipfw_insn_sa6);
4027                         CHECK_ACTLEN;
4028
4029                         p->sa.sin6_len = sizeof(struct sockaddr_in6);
4030                         p->sa.sin6_family = AF_INET6;
4031                         p->sa.sin6_port = port_number;
4032                         p->sa.sin6_flowinfo = 0;
4033                         p->sa.sin6_scope_id =
4034                             ((struct sockaddr_in6 *)&result)->sin6_scope_id;
4035                         bcopy(&((struct sockaddr_in6*)&result)->sin6_addr,
4036                             &p->sa.sin6_addr, sizeof(p->sa.sin6_addr));
4037                 } else {
4038                         errx(EX_DATAERR, "Invalid address family in forward action");
4039                 }
4040                 av++;
4041                 break;
4042             }
4043         case TOK_COMMENT:
4044                 /* pretend it is a 'count' rule followed by the comment */
4045                 action->opcode = O_COUNT;
4046                 av--;           /* go back... */
4047                 break;
4048
4049         case TOK_SETFIB:
4050             {
4051                 int numfibs;
4052                 size_t intsize = sizeof(int);
4053
4054                 action->opcode = O_SETFIB;
4055                 NEED1("missing fib number");
4056                 if (_substrcmp(*av, "tablearg") == 0) {
4057                         action->arg1 = IP_FW_TARG;
4058                 } else {
4059                         action->arg1 = strtoul(*av, NULL, 10);
4060                         if (sysctlbyname("net.fibs", &numfibs, &intsize,
4061                             NULL, 0) == -1)
4062                                 errx(EX_DATAERR, "fibs not suported.\n");
4063                         if (action->arg1 >= numfibs)  /* Temporary */
4064                                 errx(EX_DATAERR, "fib too large.\n");
4065                         /* Add high-order bit to fib to make room for tablearg*/
4066                         action->arg1 |= 0x8000;
4067                 }
4068                 av++;
4069                 break;
4070             }
4071
4072         case TOK_SETDSCP:
4073             {
4074                 int code;
4075
4076                 action->opcode = O_SETDSCP;
4077                 NEED1("missing DSCP code");
4078                 if (_substrcmp(*av, "tablearg") == 0) {
4079                         action->arg1 = IP_FW_TARG;
4080                 } else {
4081                         if (isalpha(*av[0])) {
4082                                 if ((code = match_token(f_ipdscp, *av)) == -1)
4083                                         errx(EX_DATAERR, "Unknown DSCP code");
4084                                 action->arg1 = code;
4085                         } else
4086                                 action->arg1 = strtoul(*av, NULL, 10);
4087                         /*
4088                          * Add high-order bit to DSCP to make room
4089                          * for tablearg
4090                          */
4091                         action->arg1 |= 0x8000;
4092                 }
4093                 av++;
4094                 break;
4095             }
4096
4097         case TOK_REASS:
4098                 action->opcode = O_REASS;
4099                 break;
4100
4101         case TOK_RETURN:
4102                 fill_cmd(action, O_CALLRETURN, F_NOT, 0);
4103                 break;
4104
4105         case TOK_TCPSETMSS: {
4106                 u_long mss;
4107                 uint16_t idx;
4108
4109                 idx = pack_object(tstate, "tcp-setmss", IPFW_TLV_EACTION);
4110                 if (idx == 0)
4111                         errx(EX_DATAERR, "pack_object failed");
4112                 fill_cmd(action, O_EXTERNAL_ACTION, 0, idx);
4113                 NEED1("Missing MSS value");
4114                 action = next_cmd(action, &ablen);
4115                 action->len = 1;
4116                 CHECK_ACTLEN;
4117                 mss = strtoul(*av, NULL, 10);
4118                 if (mss == 0 || mss > UINT16_MAX)
4119                         errx(EX_USAGE, "invalid MSS value %s", *av);
4120                 fill_cmd(action, O_EXTERNAL_DATA, 0, (uint16_t)mss);
4121                 av++;
4122                 break;
4123         }
4124
4125         default:
4126                 av--;
4127                 if (match_token(rule_eactions, *av) == -1)
4128                         errx(EX_DATAERR, "invalid action %s\n", *av);
4129                 /*
4130                  * External actions support.
4131                  * XXX: we support only syntax with instance name.
4132                  *      For known external actions (from rule_eactions list)
4133                  *      we can handle syntax directly. But with `eaction'
4134                  *      keyword we can use only `eaction <name> <instance>'
4135                  *      syntax.
4136                  */
4137         case TOK_EACTION: {
4138                 uint16_t idx;
4139
4140                 NEED1("Missing eaction name");
4141                 if (eaction_check_name(*av) != 0)
4142                         errx(EX_DATAERR, "Invalid eaction name %s", *av);
4143                 idx = pack_object(tstate, *av, IPFW_TLV_EACTION);
4144                 if (idx == 0)
4145                         errx(EX_DATAERR, "pack_object failed");
4146                 fill_cmd(action, O_EXTERNAL_ACTION, 0, idx);
4147                 av++;
4148                 NEED1("Missing eaction instance name");
4149                 action = next_cmd(action, &ablen);
4150                 action->len = 1;
4151                 CHECK_ACTLEN;
4152                 if (eaction_check_name(*av) != 0)
4153                         errx(EX_DATAERR, "Invalid eaction instance name %s",
4154                             *av);
4155                 /*
4156                  * External action instance object has TLV type depended
4157                  * from the external action name object index. Since we
4158                  * currently don't know this index, use zero as TLV type.
4159                  */
4160                 idx = pack_object(tstate, *av, 0);
4161                 if (idx == 0)
4162                         errx(EX_DATAERR, "pack_object failed");
4163                 fill_cmd(action, O_EXTERNAL_INSTANCE, 0, idx);
4164                 av++;
4165                 }
4166         }
4167         action = next_cmd(action, &ablen);
4168
4169         /*
4170          * [altq queuename] -- altq tag, optional
4171          * [log [logamount N]]  -- log, optional
4172          *
4173          * If they exist, it go first in the cmdbuf, but then it is
4174          * skipped in the copy section to the end of the buffer.
4175          */
4176         while (av[0] != NULL && (i = match_token(rule_action_params, *av)) != -1) {
4177                 av++;
4178                 switch (i) {
4179                 case TOK_LOG:
4180                     {
4181                         ipfw_insn_log *c = (ipfw_insn_log *)cmd;
4182                         int l;
4183
4184                         if (have_log)
4185                                 errx(EX_DATAERR,
4186                                     "log cannot be specified more than once");
4187                         have_log = (ipfw_insn *)c;
4188                         cmd->len = F_INSN_SIZE(ipfw_insn_log);
4189                         CHECK_CMDLEN;
4190                         cmd->opcode = O_LOG;
4191                         if (av[0] && _substrcmp(*av, "logamount") == 0) {
4192                                 av++;
4193                                 NEED1("logamount requires argument");
4194                                 l = atoi(*av);
4195                                 if (l < 0)
4196                                         errx(EX_DATAERR,
4197                                             "logamount must be positive");
4198                                 c->max_log = l;
4199                                 av++;
4200                         } else {
4201                                 len = sizeof(c->max_log);
4202                                 if (sysctlbyname("net.inet.ip.fw.verbose_limit",
4203                                     &c->max_log, &len, NULL, 0) == -1) {
4204                                         if (co.test_only) {
4205                                                 c->max_log = 0;
4206                                                 break;
4207                                         }
4208                                         errx(1, "sysctlbyname(\"%s\")",
4209                                             "net.inet.ip.fw.verbose_limit");
4210                                 }
4211                         }
4212                     }
4213                         break;
4214
4215 #ifndef NO_ALTQ
4216                 case TOK_ALTQ:
4217                     {
4218                         ipfw_insn_altq *a = (ipfw_insn_altq *)cmd;
4219
4220                         NEED1("missing altq queue name");
4221                         if (have_altq)
4222                                 errx(EX_DATAERR,
4223                                     "altq cannot be specified more than once");
4224                         have_altq = (ipfw_insn *)a;
4225                         cmd->len = F_INSN_SIZE(ipfw_insn_altq);
4226                         CHECK_CMDLEN;
4227                         cmd->opcode = O_ALTQ;
4228                         a->qid = altq_name_to_qid(*av);
4229                         av++;
4230                     }
4231                         break;
4232 #endif
4233
4234                 case TOK_TAG:
4235                 case TOK_UNTAG: {
4236                         uint16_t tag;
4237
4238                         if (have_tag)
4239                                 errx(EX_USAGE, "tag and untag cannot be "
4240                                     "specified more than once");
4241                         GET_UINT_ARG(tag, IPFW_ARG_MIN, IPFW_ARG_MAX, i,
4242                            rule_action_params);
4243                         have_tag = cmd;
4244                         fill_cmd(cmd, O_TAG, (i == TOK_TAG) ? 0: F_NOT, tag);
4245                         av++;
4246                         break;
4247                 }
4248
4249                 default:
4250                         abort();
4251                 }
4252                 cmd = next_cmd(cmd, &cblen);
4253         }
4254
4255         if (have_state) { /* must be a check-state, we are done */
4256                 if (*av != NULL &&
4257                     match_token(rule_options, *av) == TOK_COMMENT) {
4258                         /* check-state has a comment */
4259                         av++;
4260                         fill_comment(cmd, av, cblen);
4261                         cmd = next_cmd(cmd, &cblen);
4262                         av[0] = NULL;
4263                 }
4264                 goto done;
4265         }
4266
4267 #define OR_START(target)                                        \
4268         if (av[0] && (*av[0] == '(' || *av[0] == '{')) {        \
4269                 if (open_par)                                   \
4270                         errx(EX_USAGE, "nested \"(\" not allowed\n"); \
4271                 prev = NULL;                                    \
4272                 open_par = 1;                                   \
4273                 if ( (av[0])[1] == '\0') {                      \
4274                         av++;                                   \
4275                 } else                                          \
4276                         (*av)++;                                \
4277         }                                                       \
4278         target:                                                 \
4279
4280
4281 #define CLOSE_PAR                                               \
4282         if (open_par) {                                         \
4283                 if (av[0] && (                                  \
4284                     strcmp(*av, ")") == 0 ||                    \
4285                     strcmp(*av, "}") == 0)) {                   \
4286                         prev = NULL;                            \
4287                         open_par = 0;                           \
4288                         av++;                                   \
4289                 } else                                          \
4290                         errx(EX_USAGE, "missing \")\"\n");      \
4291         }
4292
4293 #define NOT_BLOCK                                               \
4294         if (av[0] && _substrcmp(*av, "not") == 0) {             \
4295                 if (cmd->len & F_NOT)                           \
4296                         errx(EX_USAGE, "double \"not\" not allowed\n"); \
4297                 cmd->len |= F_NOT;                              \
4298                 av++;                                           \
4299         }
4300
4301 #define OR_BLOCK(target)                                        \
4302         if (av[0] && _substrcmp(*av, "or") == 0) {              \
4303                 if (prev == NULL || open_par == 0)              \
4304                         errx(EX_DATAERR, "invalid OR block");   \
4305                 prev->len |= F_OR;                              \
4306                 av++;                                   \
4307                 goto target;                                    \
4308         }                                                       \
4309         CLOSE_PAR;
4310
4311         first_cmd = cmd;
4312
4313 #if 0
4314         /*
4315          * MAC addresses, optional.
4316          * If we have this, we skip the part "proto from src to dst"
4317          * and jump straight to the option parsing.
4318          */
4319         NOT_BLOCK;
4320         NEED1("missing protocol");
4321         if (_substrcmp(*av, "MAC") == 0 ||
4322             _substrcmp(*av, "mac") == 0) {
4323                 av++;                   /* the "MAC" keyword */
4324                 add_mac(cmd, av);       /* exits in case of errors */
4325                 cmd = next_cmd(cmd);
4326                 av += 2;                /* dst-mac and src-mac */
4327                 NOT_BLOCK;
4328                 NEED1("missing mac type");
4329                 if (add_mactype(cmd, av[0]))
4330                         cmd = next_cmd(cmd);
4331                 av++;                   /* any or mac-type */
4332                 goto read_options;
4333         }
4334 #endif
4335
4336         /*
4337          * protocol, mandatory
4338          */
4339     OR_START(get_proto);
4340         NOT_BLOCK;
4341         NEED1("missing protocol");
4342         if (add_proto_compat(cmd, *av, &proto)) {
4343                 av++;
4344                 if (F_LEN(cmd) != 0) {
4345                         prev = cmd;
4346                         cmd = next_cmd(cmd, &cblen);
4347                 }
4348         } else if (first_cmd != cmd) {
4349                 errx(EX_DATAERR, "invalid protocol ``%s''", *av);
4350         } else {
4351                 rule->flags |= IPFW_RULE_JUSTOPTS;
4352                 goto read_options;
4353         }
4354     OR_BLOCK(get_proto);
4355
4356         /*
4357          * "from", mandatory
4358          */
4359         if ((av[0] == NULL) || _substrcmp(*av, "from") != 0)
4360                 errx(EX_USAGE, "missing ``from''");
4361         av++;
4362
4363         /*
4364          * source IP, mandatory
4365          */
4366     OR_START(source_ip);
4367         NOT_BLOCK;      /* optional "not" */
4368         NEED1("missing source address");
4369         if (add_src(cmd, *av, proto, cblen, tstate)) {
4370                 av++;
4371                 if (F_LEN(cmd) != 0) {  /* ! any */
4372                         prev = cmd;
4373                         cmd = next_cmd(cmd, &cblen);
4374                 }
4375         } else
4376                 errx(EX_USAGE, "bad source address %s", *av);
4377     OR_BLOCK(source_ip);
4378
4379         /*
4380          * source ports, optional
4381          */
4382         NOT_BLOCK;      /* optional "not" */
4383         if ( av[0] != NULL ) {
4384                 if (_substrcmp(*av, "any") == 0 ||
4385                     add_ports(cmd, *av, proto, O_IP_SRCPORT, cblen)) {
4386                         av++;
4387                         if (F_LEN(cmd) != 0)
4388                                 cmd = next_cmd(cmd, &cblen);
4389                 }
4390         }
4391
4392         /*
4393          * "to", mandatory
4394          */
4395         if ( (av[0] == NULL) || _substrcmp(*av, "to") != 0 )
4396                 errx(EX_USAGE, "missing ``to''");
4397         av++;
4398
4399         /*
4400          * destination, mandatory
4401          */
4402     OR_START(dest_ip);
4403         NOT_BLOCK;      /* optional "not" */
4404         NEED1("missing dst address");
4405         if (add_dst(cmd, *av, proto, cblen, tstate)) {
4406                 av++;
4407                 if (F_LEN(cmd) != 0) {  /* ! any */
4408                         prev = cmd;
4409                         cmd = next_cmd(cmd, &cblen);
4410                 }
4411         } else
4412                 errx( EX_USAGE, "bad destination address %s", *av);
4413     OR_BLOCK(dest_ip);
4414
4415         /*
4416          * dest. ports, optional
4417          */
4418         NOT_BLOCK;      /* optional "not" */
4419         if (av[0]) {
4420                 if (_substrcmp(*av, "any") == 0 ||
4421                     add_ports(cmd, *av, proto, O_IP_DSTPORT, cblen)) {
4422                         av++;
4423                         if (F_LEN(cmd) != 0)
4424                                 cmd = next_cmd(cmd, &cblen);
4425                 }
4426         }
4427
4428 read_options:
4429         prev = NULL;
4430         while ( av[0] != NULL ) {
4431                 char *s;
4432                 ipfw_insn_u32 *cmd32;   /* alias for cmd */
4433
4434                 s = *av;
4435                 cmd32 = (ipfw_insn_u32 *)cmd;
4436
4437                 if (*s == '!') {        /* alternate syntax for NOT */
4438                         if (cmd->len & F_NOT)
4439                                 errx(EX_USAGE, "double \"not\" not allowed\n");
4440                         cmd->len = F_NOT;
4441                         s++;
4442                 }
4443                 i = match_token(rule_options, s);
4444                 av++;
4445                 switch(i) {
4446                 case TOK_NOT:
4447                         if (cmd->len & F_NOT)
4448                                 errx(EX_USAGE, "double \"not\" not allowed\n");
4449                         cmd->len = F_NOT;
4450                         break;
4451
4452                 case TOK_OR:
4453                         if (open_par == 0 || prev == NULL)
4454                                 errx(EX_USAGE, "invalid \"or\" block\n");
4455                         prev->len |= F_OR;
4456                         break;
4457
4458                 case TOK_STARTBRACE:
4459                         if (open_par)
4460                                 errx(EX_USAGE, "+nested \"(\" not allowed\n");
4461                         open_par = 1;
4462                         break;
4463
4464                 case TOK_ENDBRACE:
4465                         if (!open_par)
4466                                 errx(EX_USAGE, "+missing \")\"\n");
4467                         open_par = 0;
4468                         prev = NULL;
4469                         break;
4470
4471                 case TOK_IN:
4472                         fill_cmd(cmd, O_IN, 0, 0);
4473                         break;
4474
4475                 case TOK_OUT:
4476                         cmd->len ^= F_NOT; /* toggle F_NOT */
4477                         fill_cmd(cmd, O_IN, 0, 0);
4478                         break;
4479
4480                 case TOK_DIVERTED:
4481                         fill_cmd(cmd, O_DIVERTED, 0, 3);
4482                         break;
4483
4484                 case TOK_DIVERTEDLOOPBACK:
4485                         fill_cmd(cmd, O_DIVERTED, 0, 1);
4486                         break;
4487
4488                 case TOK_DIVERTEDOUTPUT:
4489                         fill_cmd(cmd, O_DIVERTED, 0, 2);
4490                         break;
4491
4492                 case TOK_FRAG:
4493                         fill_cmd(cmd, O_FRAG, 0, 0);
4494                         break;
4495
4496                 case TOK_LAYER2:
4497                         fill_cmd(cmd, O_LAYER2, 0, 0);
4498                         break;
4499
4500                 case TOK_XMIT:
4501                 case TOK_RECV:
4502                 case TOK_VIA:
4503                         NEED1("recv, xmit, via require interface name"
4504                                 " or address");
4505                         fill_iface((ipfw_insn_if *)cmd, av[0], cblen, tstate);
4506                         av++;
4507                         if (F_LEN(cmd) == 0)    /* not a valid address */
4508                                 break;
4509                         if (i == TOK_XMIT)
4510                                 cmd->opcode = O_XMIT;
4511                         else if (i == TOK_RECV)
4512                                 cmd->opcode = O_RECV;
4513                         else if (i == TOK_VIA)
4514                                 cmd->opcode = O_VIA;
4515                         break;
4516
4517                 case TOK_ICMPTYPES:
4518                         NEED1("icmptypes requires list of types");
4519                         fill_icmptypes((ipfw_insn_u32 *)cmd, *av);
4520                         av++;
4521                         break;
4522
4523                 case TOK_ICMP6TYPES:
4524                         NEED1("icmptypes requires list of types");
4525                         fill_icmp6types((ipfw_insn_icmp6 *)cmd, *av, cblen);
4526                         av++;
4527                         break;
4528
4529                 case TOK_IPTTL:
4530                         NEED1("ipttl requires TTL");
4531                         if (strpbrk(*av, "-,")) {
4532                             if (!add_ports(cmd, *av, 0, O_IPTTL, cblen))
4533                                 errx(EX_DATAERR, "invalid ipttl %s", *av);
4534                         } else
4535                             fill_cmd(cmd, O_IPTTL, 0, strtoul(*av, NULL, 0));
4536                         av++;
4537                         break;
4538
4539                 case TOK_IPID:
4540                         NEED1("ipid requires id");
4541                         if (strpbrk(*av, "-,")) {
4542                             if (!add_ports(cmd, *av, 0, O_IPID, cblen))
4543                                 errx(EX_DATAERR, "invalid ipid %s", *av);
4544                         } else
4545                             fill_cmd(cmd, O_IPID, 0, strtoul(*av, NULL, 0));
4546                         av++;
4547                         break;
4548
4549                 case TOK_IPLEN:
4550                         NEED1("iplen requires length");
4551                         if (strpbrk(*av, "-,")) {
4552                             if (!add_ports(cmd, *av, 0, O_IPLEN, cblen))
4553                                 errx(EX_DATAERR, "invalid ip len %s", *av);
4554                         } else
4555                             fill_cmd(cmd, O_IPLEN, 0, strtoul(*av, NULL, 0));
4556                         av++;
4557                         break;
4558
4559                 case TOK_IPVER:
4560                         NEED1("ipver requires version");
4561                         fill_cmd(cmd, O_IPVER, 0, strtoul(*av, NULL, 0));
4562                         av++;
4563                         break;
4564
4565                 case TOK_IPPRECEDENCE:
4566                         NEED1("ipprecedence requires value");
4567                         fill_cmd(cmd, O_IPPRECEDENCE, 0,
4568                             (strtoul(*av, NULL, 0) & 7) << 5);
4569                         av++;
4570                         break;
4571
4572                 case TOK_DSCP:
4573                         NEED1("missing DSCP code");
4574                         fill_dscp(cmd, *av, cblen);
4575                         av++;
4576                         break;
4577
4578                 case TOK_IPOPTS:
4579                         NEED1("missing argument for ipoptions");
4580                         fill_flags_cmd(cmd, O_IPOPT, f_ipopts, *av);
4581                         av++;
4582                         break;
4583
4584                 case TOK_IPTOS:
4585                         NEED1("missing argument for iptos");
4586                         fill_flags_cmd(cmd, O_IPTOS, f_iptos, *av);
4587                         av++;
4588                         break;
4589
4590                 case TOK_UID:
4591                         NEED1("uid requires argument");
4592                     {
4593                         char *end;
4594                         uid_t uid;
4595                         struct passwd *pwd;
4596
4597                         cmd->opcode = O_UID;
4598                         uid = strtoul(*av, &end, 0);
4599                         pwd = (*end == '\0') ? getpwuid(uid) : getpwnam(*av);
4600                         if (pwd == NULL)
4601                                 errx(EX_DATAERR, "uid \"%s\" nonexistent", *av);
4602                         cmd32->d[0] = pwd->pw_uid;
4603                         cmd->len |= F_INSN_SIZE(ipfw_insn_u32);
4604                         av++;
4605                     }
4606                         break;
4607
4608                 case TOK_GID:
4609                         NEED1("gid requires argument");
4610                     {
4611                         char *end;
4612                         gid_t gid;
4613                         struct group *grp;
4614
4615                         cmd->opcode = O_GID;
4616                         gid = strtoul(*av, &end, 0);
4617                         grp = (*end == '\0') ? getgrgid(gid) : getgrnam(*av);
4618                         if (grp == NULL)
4619                                 errx(EX_DATAERR, "gid \"%s\" nonexistent", *av);
4620                         cmd32->d[0] = grp->gr_gid;
4621                         cmd->len |= F_INSN_SIZE(ipfw_insn_u32);
4622                         av++;
4623                     }
4624                         break;
4625
4626                 case TOK_JAIL:
4627                         NEED1("jail requires argument");
4628                     {
4629                         int jid;
4630
4631                         cmd->opcode = O_JAIL;
4632                         jid = jail_getid(*av);
4633                         if (jid < 0)
4634                                 errx(EX_DATAERR, "%s", jail_errmsg);
4635                         cmd32->d[0] = (uint32_t)jid;
4636                         cmd->len |= F_INSN_SIZE(ipfw_insn_u32);
4637                         av++;
4638                     }
4639                         break;
4640
4641                 case TOK_ESTAB:
4642                         fill_cmd(cmd, O_ESTAB, 0, 0);
4643                         break;
4644
4645                 case TOK_SETUP:
4646                         fill_cmd(cmd, O_TCPFLAGS, 0,
4647                                 (TH_SYN) | ( (TH_ACK) & 0xff) <<8 );
4648                         break;
4649
4650                 case TOK_TCPDATALEN:
4651                         NEED1("tcpdatalen requires length");
4652                         if (strpbrk(*av, "-,")) {
4653                             if (!add_ports(cmd, *av, 0, O_TCPDATALEN, cblen))
4654                                 errx(EX_DATAERR, "invalid tcpdata len %s", *av);
4655                         } else
4656                             fill_cmd(cmd, O_TCPDATALEN, 0,
4657                                     strtoul(*av, NULL, 0));
4658                         av++;
4659                         break;
4660
4661                 case TOK_TCPOPTS:
4662                         NEED1("missing argument for tcpoptions");
4663                         fill_flags_cmd(cmd, O_TCPOPTS, f_tcpopts, *av);
4664                         av++;
4665                         break;
4666
4667                 case TOK_TCPSEQ:
4668                 case TOK_TCPACK:
4669                         NEED1("tcpseq/tcpack requires argument");
4670                         cmd->len = F_INSN_SIZE(ipfw_insn_u32);
4671                         cmd->opcode = (i == TOK_TCPSEQ) ? O_TCPSEQ : O_TCPACK;
4672                         cmd32->d[0] = htonl(strtoul(*av, NULL, 0));
4673                         av++;
4674                         break;
4675
4676                 case TOK_TCPWIN:
4677                         NEED1("tcpwin requires length");
4678                         if (strpbrk(*av, "-,")) {
4679                             if (!add_ports(cmd, *av, 0, O_TCPWIN, cblen))
4680                                 errx(EX_DATAERR, "invalid tcpwin len %s", *av);
4681                         } else
4682                             fill_cmd(cmd, O_TCPWIN, 0,
4683                                     strtoul(*av, NULL, 0));
4684                         av++;
4685                         break;
4686
4687                 case TOK_TCPFLAGS:
4688                         NEED1("missing argument for tcpflags");
4689                         cmd->opcode = O_TCPFLAGS;
4690                         fill_flags_cmd(cmd, O_TCPFLAGS, f_tcpflags, *av);
4691                         av++;
4692                         break;
4693
4694                 case TOK_KEEPSTATE:
4695                 case TOK_RECORDSTATE: {
4696                         uint16_t uidx;
4697
4698                         if (open_par)
4699                                 errx(EX_USAGE, "keep-state or record-state cannot be part "
4700                                     "of an or block");
4701                         if (have_state)
4702                                 errx(EX_USAGE, "only one of keep-state, record-state, "
4703                                         " limit and set-limit is allowed");
4704                         if (*av != NULL && *av[0] == ':') {
4705                                 if (state_check_name(*av + 1) != 0)
4706                                         errx(EX_DATAERR,
4707                                             "Invalid state name %s", *av);
4708                                 uidx = pack_object(tstate, *av + 1,
4709                                     IPFW_TLV_STATE_NAME);
4710                                 av++;
4711                         } else
4712                                 uidx = pack_object(tstate, default_state_name,
4713                                     IPFW_TLV_STATE_NAME);
4714                         have_state = cmd;
4715                         have_rstate = i == TOK_RECORDSTATE;
4716                         fill_cmd(cmd, O_KEEP_STATE, 0, uidx);
4717                         break;
4718                 }
4719
4720                 case TOK_LIMIT:
4721                 case TOK_SETLIMIT: {
4722                         ipfw_insn_limit *c = (ipfw_insn_limit *)cmd;
4723                         int val;
4724
4725                         if (open_par)
4726                                 errx(EX_USAGE,
4727                                     "limit or set-limit cannot be part of an or block");
4728                         if (have_state)
4729                                 errx(EX_USAGE, "only one of keep-state, record-state, "
4730                                         " limit and set-limit is allowed");
4731                         have_state = cmd;
4732                         have_rstate = i == TOK_SETLIMIT;
4733
4734                         cmd->len = F_INSN_SIZE(ipfw_insn_limit);
4735                         CHECK_CMDLEN;
4736                         cmd->opcode = O_LIMIT;
4737                         c->limit_mask = c->conn_limit = 0;
4738
4739                         while ( av[0] != NULL ) {
4740                                 if ((val = match_token(limit_masks, *av)) <= 0)
4741                                         break;
4742                                 c->limit_mask |= val;
4743                                 av++;
4744                         }
4745
4746                         if (c->limit_mask == 0)
4747                                 errx(EX_USAGE, "limit: missing limit mask");
4748
4749                         GET_UINT_ARG(c->conn_limit, IPFW_ARG_MIN, IPFW_ARG_MAX,
4750                             TOK_LIMIT, rule_options);
4751                         av++;
4752
4753                         if (*av != NULL && *av[0] == ':') {
4754                                 if (state_check_name(*av + 1) != 0)
4755                                         errx(EX_DATAERR,
4756                                             "Invalid state name %s", *av);
4757                                 cmd->arg1 = pack_object(tstate, *av + 1,
4758                                     IPFW_TLV_STATE_NAME);
4759                                 av++;
4760                         } else
4761                                 cmd->arg1 = pack_object(tstate,
4762                                     default_state_name, IPFW_TLV_STATE_NAME);
4763                         break;
4764                 }
4765
4766                 case TOK_PROTO:
4767                         NEED1("missing protocol");
4768                         if (add_proto(cmd, *av, &proto)) {
4769                                 av++;
4770                         } else
4771                                 errx(EX_DATAERR, "invalid protocol ``%s''",
4772                                     *av);
4773                         break;
4774
4775                 case TOK_SRCIP:
4776                         NEED1("missing source IP");
4777                         if (add_srcip(cmd, *av, cblen, tstate)) {
4778                                 av++;
4779                         }
4780                         break;
4781
4782                 case TOK_DSTIP:
4783                         NEED1("missing destination IP");
4784                         if (add_dstip(cmd, *av, cblen, tstate)) {
4785                                 av++;
4786                         }
4787                         break;
4788
4789                 case TOK_SRCIP6:
4790                         NEED1("missing source IP6");
4791                         if (add_srcip6(cmd, *av, cblen, tstate)) {
4792                                 av++;
4793                         }
4794                         break;
4795
4796                 case TOK_DSTIP6:
4797                         NEED1("missing destination IP6");
4798                         if (add_dstip6(cmd, *av, cblen, tstate)) {
4799                                 av++;
4800                         }
4801                         break;
4802
4803                 case TOK_SRCPORT:
4804                         NEED1("missing source port");
4805                         if (_substrcmp(*av, "any") == 0 ||
4806                             add_ports(cmd, *av, proto, O_IP_SRCPORT, cblen)) {
4807                                 av++;
4808                         } else
4809                                 errx(EX_DATAERR, "invalid source port %s", *av);
4810                         break;
4811
4812                 case TOK_DSTPORT:
4813                         NEED1("missing destination port");
4814                         if (_substrcmp(*av, "any") == 0 ||
4815                             add_ports(cmd, *av, proto, O_IP_DSTPORT, cblen)) {
4816                                 av++;
4817                         } else
4818                                 errx(EX_DATAERR, "invalid destination port %s",
4819                                     *av);
4820                         break;
4821
4822                 case TOK_MAC:
4823                         if (add_mac(cmd, av, cblen))
4824                                 av += 2;
4825                         break;
4826
4827                 case TOK_MACTYPE:
4828                         NEED1("missing mac type");
4829                         if (!add_mactype(cmd, *av, cblen))
4830                                 errx(EX_DATAERR, "invalid mac type %s", *av);
4831                         av++;
4832                         break;
4833
4834                 case TOK_VERREVPATH:
4835                         fill_cmd(cmd, O_VERREVPATH, 0, 0);
4836                         break;
4837
4838                 case TOK_VERSRCREACH:
4839                         fill_cmd(cmd, O_VERSRCREACH, 0, 0);
4840                         break;
4841
4842                 case TOK_ANTISPOOF:
4843                         fill_cmd(cmd, O_ANTISPOOF, 0, 0);
4844                         break;
4845
4846                 case TOK_IPSEC:
4847                         fill_cmd(cmd, O_IPSEC, 0, 0);
4848                         break;
4849
4850                 case TOK_IPV6:
4851                         fill_cmd(cmd, O_IP6, 0, 0);
4852                         break;
4853
4854                 case TOK_IPV4:
4855                         fill_cmd(cmd, O_IP4, 0, 0);
4856                         break;
4857
4858                 case TOK_EXT6HDR:
4859                         fill_ext6hdr( cmd, *av );
4860                         av++;
4861                         break;
4862
4863                 case TOK_FLOWID:
4864                         if (proto != IPPROTO_IPV6 )
4865                                 errx( EX_USAGE, "flow-id filter is active "
4866                                     "only for ipv6 protocol\n");
4867                         fill_flow6( (ipfw_insn_u32 *) cmd, *av, cblen);
4868                         av++;
4869                         break;
4870
4871                 case TOK_COMMENT:
4872                         fill_comment(cmd, av, cblen);
4873                         av[0]=NULL;
4874                         break;
4875
4876                 case TOK_TAGGED:
4877                         if (av[0] && strpbrk(*av, "-,")) {
4878                                 if (!add_ports(cmd, *av, 0, O_TAGGED, cblen))
4879                                         errx(EX_DATAERR, "tagged: invalid tag"
4880                                             " list: %s", *av);
4881                         }
4882                         else {
4883                                 uint16_t tag;
4884
4885                                 GET_UINT_ARG(tag, IPFW_ARG_MIN, IPFW_ARG_MAX,
4886                                     TOK_TAGGED, rule_options);
4887                                 fill_cmd(cmd, O_TAGGED, 0, tag);
4888                         }
4889                         av++;
4890                         break;
4891
4892                 case TOK_FIB:
4893                         NEED1("fib requires fib number");
4894                         fill_cmd(cmd, O_FIB, 0, strtoul(*av, NULL, 0));
4895                         av++;
4896                         break;
4897                 case TOK_SOCKARG:
4898                         fill_cmd(cmd, O_SOCKARG, 0, 0);
4899                         break;
4900
4901                 case TOK_LOOKUP: {
4902                         ipfw_insn_u32 *c = (ipfw_insn_u32 *)cmd;
4903                         int j;
4904
4905                         if (!av[0] || !av[1])
4906                                 errx(EX_USAGE, "format: lookup argument tablenum");
4907                         cmd->opcode = O_IP_DST_LOOKUP;
4908                         cmd->len |= F_INSN_SIZE(ipfw_insn) + 2;
4909                         i = match_token(rule_options, *av);
4910                         for (j = 0; lookup_key[j] >= 0 ; j++) {
4911                                 if (i == lookup_key[j])
4912                                         break;
4913                         }
4914                         if (lookup_key[j] <= 0)
4915                                 errx(EX_USAGE, "format: cannot lookup on %s", *av);
4916                         __PAST_END(c->d, 1) = j; // i converted to option
4917                         av++;
4918
4919                         if ((j = pack_table(tstate, *av)) == 0)
4920                                 errx(EX_DATAERR, "Invalid table name: %s", *av);
4921
4922                         cmd->arg1 = j;
4923                         av++;
4924                     }
4925                         break;
4926                 case TOK_FLOW:
4927                         NEED1("missing table name");
4928                         if (strncmp(*av, "table(", 6) != 0)
4929                                 errx(EX_DATAERR,
4930                                     "enclose table name into \"table()\"");
4931                         fill_table(cmd, *av, O_IP_FLOW_LOOKUP, tstate);
4932                         av++;
4933                         break;
4934
4935                 case TOK_SKIPACTION:
4936                         if (have_skipcmd)
4937                                 errx(EX_USAGE, "only one defer-action "
4938                                         "is allowed");
4939                         have_skipcmd = cmd;
4940                         fill_cmd(cmd, O_SKIP_ACTION, 0, 0);
4941                         break;
4942
4943                 default:
4944                         errx(EX_USAGE, "unrecognised option [%d] %s\n", i, s);
4945                 }
4946                 if (F_LEN(cmd) > 0) {   /* prepare to advance */
4947                         prev = cmd;
4948                         cmd = next_cmd(cmd, &cblen);
4949                 }
4950         }
4951
4952 done:
4953
4954         if (!have_state && have_skipcmd)
4955                 warnx("Rule contains \"defer-immediate-action\" "
4956                         "and doesn't contain any state-related options.");
4957
4958         /*
4959          * Now copy stuff into the rule.
4960          * If we have a keep-state option, the first instruction
4961          * must be a PROBE_STATE (which is generated here).
4962          * If we have a LOG option, it was stored as the first command,
4963          * and now must be moved to the top of the action part.
4964          */
4965         dst = (ipfw_insn *)rule->cmd;
4966
4967         /*
4968          * First thing to write into the command stream is the match probability.
4969          */
4970         if (match_prob != 1) { /* 1 means always match */
4971                 dst->opcode = O_PROB;
4972                 dst->len = 2;
4973                 *((int32_t *)(dst+1)) = (int32_t)(match_prob * 0x7fffffff);
4974                 dst += dst->len;
4975         }
4976
4977         /*
4978          * generate O_PROBE_STATE if necessary
4979          */
4980         if (have_state && have_state->opcode != O_CHECK_STATE && !have_rstate) {
4981                 fill_cmd(dst, O_PROBE_STATE, 0, have_state->arg1);
4982                 dst = next_cmd(dst, &rblen);
4983         }
4984
4985         /*
4986          * copy all commands but O_LOG, O_KEEP_STATE, O_LIMIT, O_ALTQ, O_TAG,
4987          * O_SKIP_ACTION
4988          */
4989         for (src = (ipfw_insn *)cmdbuf; src != cmd; src += i) {
4990                 i = F_LEN(src);
4991                 CHECK_RBUFLEN(i);
4992
4993                 switch (src->opcode) {
4994                 case O_LOG:
4995                 case O_KEEP_STATE:
4996                 case O_LIMIT:
4997                 case O_ALTQ:
4998                 case O_TAG:
4999                 case O_SKIP_ACTION:
5000                         break;
5001                 default:
5002                         bcopy(src, dst, i * sizeof(uint32_t));
5003                         dst += i;
5004                 }
5005         }
5006
5007         /*
5008          * put back the have_state command as last opcode
5009          */
5010         if (have_state && have_state->opcode != O_CHECK_STATE) {
5011                 i = F_LEN(have_state);
5012                 CHECK_RBUFLEN(i);
5013                 bcopy(have_state, dst, i * sizeof(uint32_t));
5014                 dst += i;
5015         }
5016
5017         /*
5018          * put back the have_skipcmd command as very last opcode
5019          */
5020         if (have_skipcmd) {
5021                 i = F_LEN(have_skipcmd);
5022                 CHECK_RBUFLEN(i);
5023                 bcopy(have_skipcmd, dst, i * sizeof(uint32_t));
5024                 dst += i;
5025         }
5026
5027         /*
5028          * start action section
5029          */
5030         rule->act_ofs = dst - rule->cmd;
5031
5032         /* put back O_LOG, O_ALTQ, O_TAG if necessary */
5033         if (have_log) {
5034                 i = F_LEN(have_log);
5035                 CHECK_RBUFLEN(i);
5036                 bcopy(have_log, dst, i * sizeof(uint32_t));
5037                 dst += i;
5038         }
5039         if (have_altq) {
5040                 i = F_LEN(have_altq);
5041                 CHECK_RBUFLEN(i);
5042                 bcopy(have_altq, dst, i * sizeof(uint32_t));
5043                 dst += i;
5044         }
5045         if (have_tag) {
5046                 i = F_LEN(have_tag);
5047                 CHECK_RBUFLEN(i);
5048                 bcopy(have_tag, dst, i * sizeof(uint32_t));
5049                 dst += i;
5050         }
5051
5052         /*
5053          * copy all other actions
5054          */
5055         for (src = (ipfw_insn *)actbuf; src != action; src += i) {
5056                 i = F_LEN(src);
5057                 CHECK_RBUFLEN(i);
5058                 bcopy(src, dst, i * sizeof(uint32_t));
5059                 dst += i;
5060         }
5061
5062         rule->cmd_len = (uint32_t *)dst - (uint32_t *)(rule->cmd);
5063         *rbufsize = (char *)dst - (char *)rule;
5064 }
5065
5066 static int
5067 compare_ntlv(const void *_a, const void *_b)
5068 {
5069         ipfw_obj_ntlv *a, *b;
5070
5071         a = (ipfw_obj_ntlv *)_a;
5072         b = (ipfw_obj_ntlv *)_b;
5073
5074         if (a->set < b->set)
5075                 return (-1);
5076         else if (a->set > b->set)
5077                 return (1);
5078
5079         if (a->idx < b->idx)
5080                 return (-1);
5081         else if (a->idx > b->idx)
5082                 return (1);
5083
5084         if (a->head.type < b->head.type)
5085                 return (-1);
5086         else if (a->head.type > b->head.type)
5087                 return (1);
5088
5089         return (0);
5090 }
5091
5092 /*
5093  * Provide kernel with sorted list of referenced objects
5094  */
5095 static void
5096 object_sort_ctlv(ipfw_obj_ctlv *ctlv)
5097 {
5098
5099         qsort(ctlv + 1, ctlv->count, ctlv->objsize, compare_ntlv);
5100 }
5101
5102 struct object_kt {
5103         uint16_t        uidx;
5104         uint16_t        type;
5105 };
5106 static int
5107 compare_object_kntlv(const void *k, const void *v)
5108 {
5109         ipfw_obj_ntlv *ntlv;
5110         struct object_kt key;
5111
5112         key = *((struct object_kt *)k);
5113         ntlv = (ipfw_obj_ntlv *)v;
5114
5115         if (key.uidx < ntlv->idx)
5116                 return (-1);
5117         else if (key.uidx > ntlv->idx)
5118                 return (1);
5119
5120         if (key.type < ntlv->head.type)
5121                 return (-1);
5122         else if (key.type > ntlv->head.type)
5123                 return (1);
5124
5125         return (0);
5126 }
5127
5128 /*
5129  * Finds object name in @ctlv by @idx and @type.
5130  * Uses the following facts:
5131  * 1) All TLVs are the same size
5132  * 2) Kernel implementation provides already sorted list.
5133  *
5134  * Returns table name or NULL.
5135  */
5136 static char *
5137 object_search_ctlv(ipfw_obj_ctlv *ctlv, uint16_t idx, uint16_t type)
5138 {
5139         ipfw_obj_ntlv *ntlv;
5140         struct object_kt key;
5141
5142         key.uidx = idx;
5143         key.type = type;
5144
5145         ntlv = bsearch(&key, (ctlv + 1), ctlv->count, ctlv->objsize,
5146             compare_object_kntlv);
5147
5148         if (ntlv != NULL)
5149                 return (ntlv->name);
5150
5151         return (NULL);
5152 }
5153
5154 static char *
5155 table_search_ctlv(ipfw_obj_ctlv *ctlv, uint16_t idx)
5156 {
5157
5158         return (object_search_ctlv(ctlv, idx, IPFW_TLV_TBL_NAME));
5159 }
5160
5161 /*
5162  * Adds one or more rules to ipfw chain.
5163  * Data layout:
5164  * Request:
5165  * [
5166  *   ip_fw3_opheader
5167  *   [ ipfw_obj_ctlv(IPFW_TLV_TBL_LIST) ipfw_obj_ntlv x N ] (optional *1)
5168  *   [ ipfw_obj_ctlv(IPFW_TLV_RULE_LIST) [ ip_fw_rule ip_fw_insn ] x N ] (*2) (*3)
5169  * ]
5170  * Reply:
5171  * [
5172  *   ip_fw3_opheader
5173  *   [ ipfw_obj_ctlv(IPFW_TLV_TBL_LIST) ipfw_obj_ntlv x N ] (optional)
5174  *   [ ipfw_obj_ctlv(IPFW_TLV_RULE_LIST) [ ip_fw_rule ip_fw_insn ] x N ]
5175  * ]
5176  *
5177  * Rules in reply are modified to store their actual ruleset number.
5178  *
5179  * (*1) TLVs inside IPFW_TLV_TBL_LIST needs to be sorted ascending
5180  * according to their idx field and there has to be no duplicates.
5181  * (*2) Numbered rules inside IPFW_TLV_RULE_LIST needs to be sorted ascending.
5182  * (*3) Each ip_fw structure needs to be aligned to u64 boundary.
5183  */
5184 void
5185 ipfw_add(char *av[])
5186 {
5187         uint32_t rulebuf[1024];
5188         int rbufsize, default_off, tlen, rlen;
5189         size_t sz;
5190         struct tidx ts;
5191         struct ip_fw_rule *rule;
5192         caddr_t tbuf;
5193         ip_fw3_opheader *op3;
5194         ipfw_obj_ctlv *ctlv, *tstate;
5195
5196         rbufsize = sizeof(rulebuf);
5197         memset(rulebuf, 0, rbufsize);
5198         memset(&ts, 0, sizeof(ts));
5199
5200         /* Optimize case with no tables */
5201         default_off = sizeof(ipfw_obj_ctlv) + sizeof(ip_fw3_opheader);
5202         op3 = (ip_fw3_opheader *)rulebuf;
5203         ctlv = (ipfw_obj_ctlv *)(op3 + 1);
5204         rule = (struct ip_fw_rule *)(ctlv + 1);
5205         rbufsize -= default_off;
5206
5207         compile_rule(av, (uint32_t *)rule, &rbufsize, &ts);
5208         /* Align rule size to u64 boundary */
5209         rlen = roundup2(rbufsize, sizeof(uint64_t));
5210
5211         tbuf = NULL;
5212         sz = 0;
5213         tstate = NULL;
5214         if (ts.count != 0) {
5215                 /* Some tables. We have to alloc more data */
5216                 tlen = ts.count * sizeof(ipfw_obj_ntlv);
5217                 sz = default_off + sizeof(ipfw_obj_ctlv) + tlen + rlen;
5218
5219                 if ((tbuf = calloc(1, sz)) == NULL)
5220                         err(EX_UNAVAILABLE, "malloc() failed for IP_FW_ADD");
5221                 op3 = (ip_fw3_opheader *)tbuf;
5222                 /* Tables first */
5223                 ctlv = (ipfw_obj_ctlv *)(op3 + 1);
5224                 ctlv->head.type = IPFW_TLV_TBLNAME_LIST;
5225                 ctlv->head.length = sizeof(ipfw_obj_ctlv) + tlen;
5226                 ctlv->count = ts.count;
5227                 ctlv->objsize = sizeof(ipfw_obj_ntlv);
5228                 memcpy(ctlv + 1, ts.idx, tlen);
5229                 object_sort_ctlv(ctlv);
5230                 tstate = ctlv;
5231                 /* Rule next */
5232                 ctlv = (ipfw_obj_ctlv *)((caddr_t)ctlv + ctlv->head.length);
5233                 ctlv->head.type = IPFW_TLV_RULE_LIST;
5234                 ctlv->head.length = sizeof(ipfw_obj_ctlv) + rlen;
5235                 ctlv->count = 1;
5236                 memcpy(ctlv + 1, rule, rbufsize);
5237         } else {
5238                 /* Simply add header */
5239                 sz = rlen + default_off;
5240                 memset(ctlv, 0, sizeof(*ctlv));
5241                 ctlv->head.type = IPFW_TLV_RULE_LIST;
5242                 ctlv->head.length = sizeof(ipfw_obj_ctlv) + rlen;
5243                 ctlv->count = 1;
5244         }
5245
5246         if (do_get3(IP_FW_XADD, op3, &sz) != 0)
5247                 err(EX_UNAVAILABLE, "getsockopt(%s)", "IP_FW_XADD");
5248
5249         if (!co.do_quiet) {
5250                 struct format_opts sfo;
5251                 struct buf_pr bp;
5252                 memset(&sfo, 0, sizeof(sfo));
5253                 sfo.tstate = tstate;
5254                 sfo.set_mask = (uint32_t)(-1);
5255                 bp_alloc(&bp, 4096);
5256                 show_static_rule(&co, &sfo, &bp, rule, NULL);
5257                 printf("%s", bp.buf);
5258                 bp_free(&bp);
5259         }
5260
5261         if (tbuf != NULL)
5262                 free(tbuf);
5263
5264         if (ts.idx != NULL)
5265                 free(ts.idx);
5266 }
5267
5268 /*
5269  * clear the counters or the log counters.
5270  * optname has the following values:
5271  *  0 (zero both counters and logging)
5272  *  1 (zero logging only)
5273  */
5274 void
5275 ipfw_zero(int ac, char *av[], int optname)
5276 {
5277         ipfw_range_tlv rt;
5278         char const *errstr;
5279         char const *name = optname ? "RESETLOG" : "ZERO";
5280         uint32_t arg;
5281         int failed = EX_OK;
5282
5283         optname = optname ? IP_FW_XRESETLOG : IP_FW_XZERO;
5284         av++; ac--;
5285
5286         if (ac == 0) {
5287                 /* clear all entries */
5288                 memset(&rt, 0, sizeof(rt));
5289                 rt.flags = IPFW_RCFLAG_ALL;
5290                 if (do_range_cmd(optname, &rt) < 0)
5291                         err(EX_UNAVAILABLE, "setsockopt(IP_FW_X%s)", name);
5292                 if (!co.do_quiet)
5293                         printf("%s.\n", optname == IP_FW_XZERO ?
5294                             "Accounting cleared":"Logging counts reset");
5295
5296                 return;
5297         }
5298
5299         while (ac) {
5300                 /* Rule number */
5301                 if (isdigit(**av)) {
5302                         arg = strtonum(*av, 0, 0xffff, &errstr);
5303                         if (errstr)
5304                                 errx(EX_DATAERR,
5305                                     "invalid rule number %s\n", *av);
5306                         memset(&rt, 0, sizeof(rt));
5307                         rt.start_rule = arg;
5308                         rt.end_rule = arg;
5309                         rt.flags |= IPFW_RCFLAG_RANGE;
5310                         if (co.use_set != 0) {
5311                                 rt.set = co.use_set - 1;
5312                                 rt.flags |= IPFW_RCFLAG_SET;
5313                         }
5314                         if (do_range_cmd(optname, &rt) != 0) {
5315                                 warn("rule %u: setsockopt(IP_FW_X%s)",
5316                                     arg, name);
5317                                 failed = EX_UNAVAILABLE;
5318                         } else if (rt.new_set == 0) {
5319                                 printf("Entry %d not found\n", arg);
5320                                 failed = EX_UNAVAILABLE;
5321                         } else if (!co.do_quiet)
5322                                 printf("Entry %d %s.\n", arg,
5323                                     optname == IP_FW_XZERO ?
5324                                         "cleared" : "logging count reset");
5325                 } else {
5326                         errx(EX_USAGE, "invalid rule number ``%s''", *av);
5327                 }
5328                 av++; ac--;
5329         }
5330         if (failed != EX_OK)
5331                 exit(failed);
5332 }
5333
5334 void
5335 ipfw_flush(int force)
5336 {
5337         ipfw_range_tlv rt;
5338
5339         if (!force && !co.do_quiet) { /* need to ask user */
5340                 int c;
5341
5342                 printf("Are you sure? [yn] ");
5343                 fflush(stdout);
5344                 do {
5345                         c = toupper(getc(stdin));
5346                         while (c != '\n' && getc(stdin) != '\n')
5347                                 if (feof(stdin))
5348                                         return; /* and do not flush */
5349                 } while (c != 'Y' && c != 'N');
5350                 printf("\n");
5351                 if (c == 'N')   /* user said no */
5352                         return;
5353         }
5354         if (co.do_pipe) {
5355                 dummynet_flush();
5356                 return;
5357         }
5358         /* `ipfw set N flush` - is the same that `ipfw delete set N` */
5359         memset(&rt, 0, sizeof(rt));
5360         if (co.use_set != 0) {
5361                 rt.set = co.use_set - 1;
5362                 rt.flags = IPFW_RCFLAG_SET;
5363         } else
5364                 rt.flags = IPFW_RCFLAG_ALL;
5365         if (do_range_cmd(IP_FW_XDEL, &rt) != 0)
5366                         err(EX_UNAVAILABLE, "setsockopt(IP_FW_XDEL)");
5367         if (!co.do_quiet)
5368                 printf("Flushed all %s.\n", co.do_pipe ? "pipes" : "rules");
5369 }
5370
5371 static struct _s_x intcmds[] = {
5372       { "talist",       TOK_TALIST },
5373       { "iflist",       TOK_IFLIST },
5374       { "olist",        TOK_OLIST },
5375       { "vlist",        TOK_VLIST },
5376       { NULL, 0 }
5377 };
5378
5379 static struct _s_x otypes[] = {
5380         { "EACTION",    IPFW_TLV_EACTION },
5381         { "DYNSTATE",   IPFW_TLV_STATE_NAME },
5382         { NULL, 0 }
5383 };
5384
5385 static const char*
5386 lookup_eaction_name(ipfw_obj_ntlv *ntlv, int cnt, uint16_t type)
5387 {
5388         const char *name;
5389         int i;
5390
5391         name = NULL;
5392         for (i = 0; i < cnt; i++) {
5393                 if (ntlv[i].head.type != IPFW_TLV_EACTION)
5394                         continue;
5395                 if (IPFW_TLV_EACTION_NAME(ntlv[i].idx) != type)
5396                         continue;
5397                 name = ntlv[i].name;
5398                 break;
5399         }
5400         return (name);
5401 }
5402
5403 static void
5404 ipfw_list_objects(int ac, char *av[])
5405 {
5406         ipfw_obj_lheader req, *olh;
5407         ipfw_obj_ntlv *ntlv;
5408         const char *name;
5409         size_t sz;
5410         int i;
5411
5412         memset(&req, 0, sizeof(req));
5413         sz = sizeof(req);
5414         if (do_get3(IP_FW_DUMP_SRVOBJECTS, &req.opheader, &sz) != 0)
5415                 if (errno != ENOMEM)
5416                         return;
5417
5418         sz = req.size;
5419         if ((olh = calloc(1, sz)) == NULL)
5420                 return;
5421
5422         olh->size = sz;
5423         if (do_get3(IP_FW_DUMP_SRVOBJECTS, &olh->opheader, &sz) != 0) {
5424                 free(olh);
5425                 return;
5426         }
5427
5428         if (olh->count > 0)
5429                 printf("Objects list:\n");
5430         else
5431                 printf("There are no objects\n");
5432         ntlv = (ipfw_obj_ntlv *)(olh + 1);
5433         for (i = 0; i < olh->count; i++) {
5434                 name = match_value(otypes, ntlv->head.type);
5435                 if (name == NULL)
5436                         name = lookup_eaction_name(
5437                             (ipfw_obj_ntlv *)(olh + 1), olh->count,
5438                             ntlv->head.type);
5439                 if (name == NULL)
5440                         printf(" kidx: %4d\ttype: %10d\tname: %s\n",
5441                             ntlv->idx, ntlv->head.type, ntlv->name);
5442                 else
5443                         printf(" kidx: %4d\ttype: %10s\tname: %s\n",
5444                             ntlv->idx, name, ntlv->name);
5445                 ntlv++;
5446         }
5447         free(olh);
5448 }
5449
5450 void
5451 ipfw_internal_handler(int ac, char *av[])
5452 {
5453         int tcmd;
5454
5455         ac--; av++;
5456         NEED1("internal cmd required");
5457
5458         if ((tcmd = match_token(intcmds, *av)) == -1)
5459                 errx(EX_USAGE, "invalid internal sub-cmd: %s", *av);
5460
5461         switch (tcmd) {
5462         case TOK_IFLIST:
5463                 ipfw_list_tifaces();
5464                 break;
5465         case TOK_TALIST:
5466                 ipfw_list_ta(ac, av);
5467                 break;
5468         case TOK_OLIST:
5469                 ipfw_list_objects(ac, av);
5470                 break;
5471         case TOK_VLIST:
5472                 ipfw_list_values(ac, av);
5473                 break;
5474         }
5475 }
5476
5477 static int
5478 ipfw_get_tracked_ifaces(ipfw_obj_lheader **polh)
5479 {
5480         ipfw_obj_lheader req, *olh;
5481         size_t sz;
5482
5483         memset(&req, 0, sizeof(req));
5484         sz = sizeof(req);
5485
5486         if (do_get3(IP_FW_XIFLIST, &req.opheader, &sz) != 0) {
5487                 if (errno != ENOMEM)
5488                         return (errno);
5489         }
5490
5491         sz = req.size;
5492         if ((olh = calloc(1, sz)) == NULL)
5493                 return (ENOMEM);
5494
5495         olh->size = sz;
5496         if (do_get3(IP_FW_XIFLIST, &olh->opheader, &sz) != 0) {
5497                 free(olh);
5498                 return (errno);
5499         }
5500
5501         *polh = olh;
5502         return (0);
5503 }
5504
5505 static int
5506 ifinfo_cmp(const void *a, const void *b)
5507 {
5508         ipfw_iface_info *ia, *ib;
5509
5510         ia = (ipfw_iface_info *)a;
5511         ib = (ipfw_iface_info *)b;
5512
5513         return (stringnum_cmp(ia->ifname, ib->ifname));
5514 }
5515
5516 /*
5517  * Retrieves table list from kernel,
5518  * optionally sorts it and calls requested function for each table.
5519  * Returns 0 on success.
5520  */
5521 static void
5522 ipfw_list_tifaces()
5523 {
5524         ipfw_obj_lheader *olh;
5525         ipfw_iface_info *info;
5526         int i, error;
5527
5528         if ((error = ipfw_get_tracked_ifaces(&olh)) != 0)
5529                 err(EX_OSERR, "Unable to request ipfw tracked interface list");
5530
5531
5532         qsort(olh + 1, olh->count, olh->objsize, ifinfo_cmp);
5533
5534         info = (ipfw_iface_info *)(olh + 1);
5535         for (i = 0; i < olh->count; i++) {
5536                 if (info->flags & IPFW_IFFLAG_RESOLVED)
5537                         printf("%s ifindex: %d refcount: %u changes: %u\n",
5538                             info->ifname, info->ifindex, info->refcnt,
5539                             info->gencnt);
5540                 else
5541                         printf("%s ifindex: unresolved refcount: %u changes: %u\n",
5542                             info->ifname, info->refcnt, info->gencnt);
5543                 info = (ipfw_iface_info *)((caddr_t)info + olh->objsize);
5544         }
5545
5546         free(olh);
5547 }
5548
5549
5550
5551