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