sbin/ipfw/ipfw2.c

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