sbin/ipfw/ipfw2.c

   1 /*
   2  * Copyright (c) 2002-2003 Luigi Rizzo
   3  * Copyright (c) 1996 Alex Nash, Paul Traina, Poul-Henning Kamp
   4  * Copyright (c) 1994 Ugen J.S.Antsilevich
   5  *
   6  * Idea and grammar partially left from:
   7  * Copyright (c) 1993 Daniel Boulet
   8  *
   9  * Redistribution and use in source forms, with and without modification,
  10  * are permitted provided that this entire comment appears intact.
  11  *
  12  * Redistribution in binary form may occur without any restrictions.
  13  * Obviously, it would be nice if you gave credit where credit is due
  14  * but requiring it would be too onerous.
  15  *
  16  * This software is provided ``AS IS'' without any warranties of any kind.
  17  *
  18  * NEW command line interface for IP firewall facility
  19  *
  20  * $FreeBSD$
  21  */
  22
  23 #include <sys/types.h>
  24 #include <sys/param.h>
  25 #include <sys/socket.h>
  26 #include <sys/sockio.h>
  27 #include <sys/sysctl.h>
  28
  29 #include "ipfw2.h"
  30
  31 #include <ctype.h>
  32 #include <err.h>
  33 #include <errno.h>
  34 #include <grp.h>
  35 #include <netdb.h>
  36 #include <pwd.h>
  37 #include <stdio.h>
  38 #include <stdarg.h>
  39 #include <stdint.h>
  40 #include <stdlib.h>
  41 #include <string.h>
  42 #include <sysexits.h>
  43 #include <time.h>       /* ctime */
  44 #include <timeconv.h>   /* _long_to_time */
  45 #include <unistd.h>
  46 #include <fcntl.h>
  47 #include <stddef.h>     /* offsetof */
  48
  49 #include <net/ethernet.h>
  50 #include <net/if.h>             /* only IFNAMSIZ */
  51 #include <netinet/in.h>
  52 #include <netinet/in_systm.h>   /* only n_short, n_long */
  53 #include <netinet/ip.h>
  54 #include <netinet/ip_icmp.h>
  55 #include <netinet/ip_fw.h>
  56 #include <netinet/tcp.h>
  57 #include <arpa/inet.h>
  58
  59 struct cmdline_opts co; /* global options */
  60
  61 struct format_opts {
  62         int bcwidth;
  63         int pcwidth;
  64         int show_counters;
  65         int show_time;          /* show timestamp */
  66         uint32_t set_mask;      /* enabled sets mask */
  67         uint32_t flags;         /* request flags */
  68         uint32_t first;         /* first rule to request */
  69         uint32_t last;          /* last rule to request */
  70         uint32_t dcnt;          /* number of dynamic states */
  71         ipfw_obj_ctlv *tstate;  /* table state data */
  72 };
  73
  74 int resvd_set_number = RESVD_SET;
  75
  76 int ipfw_socket = -1;
  77
  78 #define CHECK_LENGTH(v, len) do {                               \
  79         if ((v) < (len))                                        \
  80                 errx(EX_DATAERR, "Rule too long");              \
  81         } while (0)
  82 /*
  83  * Check if we have enough space in cmd buffer. Note that since
  84  * first 8? u32 words are reserved by reserved header, full cmd
  85  * buffer can't be used, so we need to protect from buffer overrun
  86  * only. At the beginning, cblen is less than actual buffer size by
  87  * size of ipfw_insn_u32 instruction + 1 u32 work. This eliminates need
  88  * for checking small instructions fitting in given range.
  89  * We also (ab)use the fact that ipfw_insn is always the first field
  90  * for any custom instruction.
  91  */
  92 #define CHECK_CMDLEN    CHECK_LENGTH(cblen, F_LEN((ipfw_insn *)cmd))
  93
  94 #define GET_UINT_ARG(arg, min, max, tok, s_x) do {                      \
  95         if (!av[0])                                                     \
  96                 errx(EX_USAGE, "%s: missing argument", match_value(s_x, tok)); \
  97         if (_substrcmp(*av, "tablearg") == 0) {                         \
  98                 arg = IP_FW_TARG;                                       \
  99                 break;                                                  \
 100         }                                                               \
 101                                                                         \
 102         {                                                               \
 103         long _xval;                                                     \
 104         char *end;                                                      \
 105                                                                         \
 106         _xval = strtol(*av, &end, 10);                                  \
 107                                                                         \
 108         if (!isdigit(**av) || *end != '\0' || (_xval == 0 && errno == EINVAL)) \
 109                 errx(EX_DATAERR, "%s: invalid argument: %s",            \
 110                     match_value(s_x, tok), *av);                        \
 111                                                                         \
 112         if (errno == ERANGE || _xval < min || _xval > max)              \
 113                 errx(EX_DATAERR, "%s: argument is out of range (%u..%u): %s", \
 114                     match_value(s_x, tok), min, max, *av);              \
 115                                                                         \
 116         if (_xval == IP_FW_TARG)                                        \
 117                 errx(EX_DATAERR, "%s: illegal argument value: %s",      \
 118                     match_value(s_x, tok), *av);                        \
 119         arg = _xval;                                                    \
 120         }                                                               \
 121 } while (0)
 122
 123 static struct _s_x f_tcpflags[] = {
 124         { "syn", TH_SYN },
 125         { "fin", TH_FIN },
 126         { "ack", TH_ACK },
 127         { "psh", TH_PUSH },
 128         { "rst", TH_RST },
 129         { "urg", TH_URG },
 130         { "tcp flag", 0 },
 131         { NULL, 0 }
 132 };
 133
 134 static struct _s_x f_tcpopts[] = {
 135         { "mss",        IP_FW_TCPOPT_MSS },
 136         { "maxseg",     IP_FW_TCPOPT_MSS },
 137         { "window",     IP_FW_TCPOPT_WINDOW },
 138         { "sack",       IP_FW_TCPOPT_SACK },
 139         { "ts",         IP_FW_TCPOPT_TS },
 140         { "timestamp",  IP_FW_TCPOPT_TS },
 141         { "cc",         IP_FW_TCPOPT_CC },
 142         { "tcp option", 0 },
 143         { NULL, 0 }
 144 };
 145
 146 /*
 147  * IP options span the range 0 to 255 so we need to remap them
 148  * (though in fact only the low 5 bits are significant).
 149  */
 150 static struct _s_x f_ipopts[] = {
 151         { "ssrr",       IP_FW_IPOPT_SSRR},
 152         { "lsrr",       IP_FW_IPOPT_LSRR},
 153         { "rr",         IP_FW_IPOPT_RR},
 154         { "ts",         IP_FW_IPOPT_TS},
 155         { "ip option",  0 },
 156         { NULL, 0 }
 157 };
 158
 159 static struct _s_x f_iptos[] = {
 160         { "lowdelay",   IPTOS_LOWDELAY},
 161         { "throughput", IPTOS_THROUGHPUT},
 162         { "reliability", IPTOS_RELIABILITY},
 163         { "mincost",    IPTOS_MINCOST},
 164         { "congestion", IPTOS_ECN_CE},
 165         { "ecntransport", IPTOS_ECN_ECT0},
 166         { "ip tos option", 0},
 167         { NULL, 0 }
 168 };
 169
 170 struct _s_x f_ipdscp[] = {
 171         { "af11", IPTOS_DSCP_AF11 >> 2 },       /* 001010 */
 172         { "af12", IPTOS_DSCP_AF12 >> 2 },       /* 001100 */
 173         { "af13", IPTOS_DSCP_AF13 >> 2 },       /* 001110 */
 174         { "af21", IPTOS_DSCP_AF21 >> 2 },       /* 010010 */
 175         { "af22", IPTOS_DSCP_AF22 >> 2 },       /* 010100 */
 176         { "af23", IPTOS_DSCP_AF23 >> 2 },       /* 010110 */
 177         { "af31", IPTOS_DSCP_AF31 >> 2 },       /* 011010 */
 178         { "af32", IPTOS_DSCP_AF32 >> 2 },       /* 011100 */
 179         { "af33", IPTOS_DSCP_AF33 >> 2 },       /* 011110 */
 180         { "af41", IPTOS_DSCP_AF41 >> 2 },       /* 100010 */
 181         { "af42", IPTOS_DSCP_AF42 >> 2 },       /* 100100 */
 182         { "af43", IPTOS_DSCP_AF43 >> 2 },       /* 100110 */
 183         { "be", IPTOS_DSCP_CS0 >> 2 },  /* 000000 */
 184         { "ef", IPTOS_DSCP_EF >> 2 },   /* 101110 */
 185         { "cs0", IPTOS_DSCP_CS0 >> 2 }, /* 000000 */
 186         { "cs1", IPTOS_DSCP_CS1 >> 2 }, /* 001000 */
 187         { "cs2", IPTOS_DSCP_CS2 >> 2 }, /* 010000 */
 188         { "cs3", IPTOS_DSCP_CS3 >> 2 }, /* 011000 */
 189         { "cs4", IPTOS_DSCP_CS4 >> 2 }, /* 100000 */
 190         { "cs5", IPTOS_DSCP_CS5 >> 2 }, /* 101000 */
 191         { "cs6", IPTOS_DSCP_CS6 >> 2 }, /* 110000 */
 192         { "cs7", IPTOS_DSCP_CS7 >> 2 }, /* 100000 */
 193         { NULL, 0 }
 194 };
 195
 196 static struct _s_x limit_masks[] = {
 197         {"all",         DYN_SRC_ADDR|DYN_SRC_PORT|DYN_DST_ADDR|DYN_DST_PORT},
 198         {"src-addr",    DYN_SRC_ADDR},
 199         {"src-port",    DYN_SRC_PORT},
 200         {"dst-addr",    DYN_DST_ADDR},
 201         {"dst-port",    DYN_DST_PORT},
 202         {NULL,          0}
 203 };
 204
 205 /*
 206  * we use IPPROTO_ETHERTYPE as a fake protocol id to call the print routines
 207  * This is only used in this code.
 208  */
 209 #define IPPROTO_ETHERTYPE       0x1000
 210 static struct _s_x ether_types[] = {
 211     /*
 212      * Note, we cannot use "-:&/" in the names because they are field
 213      * separators in the type specifications. Also, we use s = NULL as
 214      * end-delimiter, because a type of 0 can be legal.
 215      */
 216         { "ip",         0x0800 },
 217         { "ipv4",       0x0800 },
 218         { "ipv6",       0x86dd },
 219         { "arp",        0x0806 },
 220         { "rarp",       0x8035 },
 221         { "vlan",       0x8100 },
 222         { "loop",       0x9000 },
 223         { "trail",      0x1000 },
 224         { "at",         0x809b },
 225         { "atalk",      0x809b },
 226         { "aarp",       0x80f3 },
 227         { "pppoe_disc", 0x8863 },
 228         { "pppoe_sess", 0x8864 },
 229         { "ipx_8022",   0x00E0 },
 230         { "ipx_8023",   0x0000 },
 231         { "ipx_ii",     0x8137 },
 232         { "ipx_snap",   0x8137 },
 233         { "ipx",        0x8137 },
 234         { "ns",         0x0600 },
 235         { NULL,         0 }
 236 };
 237
 238 static struct _s_x rule_eactions[] = {
 239         { "nat64lsn",           TOK_NAT64LSN },
 240         { "nat64stl",           TOK_NAT64STL },
 241         { "nptv6",              TOK_NPTV6 },
 242         { "tcp-setmss",         TOK_TCPSETMSS },
 243         { NULL, 0 }     /* terminator */
 244 };
 245
 246 static struct _s_x rule_actions[] = {
 247         { "abort6",             TOK_ABORT6 },
 248         { "abort",              TOK_ABORT },
 249         { "accept",             TOK_ACCEPT },
 250         { "pass",               TOK_ACCEPT },
 251         { "allow",              TOK_ACCEPT },
 252         { "permit",             TOK_ACCEPT },
 253         { "count",              TOK_COUNT },
 254         { "pipe",               TOK_PIPE },
 255         { "queue",              TOK_QUEUE },
 256         { "divert",             TOK_DIVERT },
 257         { "tee",                TOK_TEE },
 258         { "netgraph",           TOK_NETGRAPH },
 259         { "ngtee",              TOK_NGTEE },
 260         { "fwd",                TOK_FORWARD },
 261         { "forward",            TOK_FORWARD },
 262         { "skipto",             TOK_SKIPTO },
 263         { "deny",               TOK_DENY },
 264         { "drop",               TOK_DENY },
 265         { "reject",             TOK_REJECT },
 266         { "reset6",             TOK_RESET6 },
 267         { "reset",              TOK_RESET },
 268         { "unreach6",           TOK_UNREACH6 },
 269         { "unreach",            TOK_UNREACH },
 270         { "check-state",        TOK_CHECKSTATE },
 271         { "//",                 TOK_COMMENT },
 272         { "nat",                TOK_NAT },
 273         { "reass",              TOK_REASS },
 274         { "setfib",             TOK_SETFIB },
 275         { "setdscp",            TOK_SETDSCP },
 276         { "call",               TOK_CALL },
 277         { "return",             TOK_RETURN },
 278         { "eaction",            TOK_EACTION },
 279         { "tcp-setmss",         TOK_TCPSETMSS },
 280         { NULL, 0 }     /* terminator */
 281 };
 282
 283 static struct _s_x rule_action_params[] = {
 284         { "altq",               TOK_ALTQ },
 285         { "log",                TOK_LOG },
 286         { "tag",                TOK_TAG },
 287         { "untag",              TOK_UNTAG },
 288         { NULL, 0 }     /* terminator */
 289 };
 290
 291 /*
 292  * The 'lookup' instruction accepts one of the following arguments.
 293  * -1 is a terminator for the list.
 294  * Arguments are passed as v[1] in O_DST_LOOKUP options.
 295  */
 296 static int lookup_key[] = {
 297         TOK_DSTIP, TOK_SRCIP, TOK_DSTPORT, TOK_SRCPORT,
 298         TOK_UID, TOK_JAIL, TOK_DSCP, -1 };
 299
 300 static struct _s_x rule_options[] = {
 301         { "tagged",             TOK_TAGGED },
 302         { "uid",                TOK_UID },
 303         { "gid",                TOK_GID },
 304         { "jail",               TOK_JAIL },
 305         { "in",                 TOK_IN },
 306         { "limit",              TOK_LIMIT },
 307         { "keep-state",         TOK_KEEPSTATE },
 308         { "bridged",            TOK_LAYER2 },
 309         { "layer2",             TOK_LAYER2 },
 310         { "out",                TOK_OUT },
 311         { "diverted",           TOK_DIVERTED },
 312         { "diverted-loopback",  TOK_DIVERTEDLOOPBACK },
 313         { "diverted-output",    TOK_DIVERTEDOUTPUT },
 314         { "xmit",               TOK_XMIT },
 315         { "recv",               TOK_RECV },
 316         { "via",                TOK_VIA },
 317         { "fragment",           TOK_FRAG },
 318         { "frag",               TOK_FRAG },
 319         { "fib",                TOK_FIB },
 320         { "ipoptions",          TOK_IPOPTS },
 321         { "ipopts",             TOK_IPOPTS },
 322         { "iplen",              TOK_IPLEN },
 323         { "ipid",               TOK_IPID },
 324         { "ipprecedence",       TOK_IPPRECEDENCE },
 325         { "dscp",               TOK_DSCP },
 326         { "iptos",              TOK_IPTOS },
 327         { "ipttl",              TOK_IPTTL },
 328         { "ipversion",          TOK_IPVER },
 329         { "ipver",              TOK_IPVER },
 330         { "estab",              TOK_ESTAB },
 331         { "established",        TOK_ESTAB },
 332         { "setup",              TOK_SETUP },
 333         { "sockarg",            TOK_SOCKARG },
 334         { "tcpdatalen",         TOK_TCPDATALEN },
 335         { "tcpflags",           TOK_TCPFLAGS },
 336         { "tcpflgs",            TOK_TCPFLAGS },
 337         { "tcpoptions",         TOK_TCPOPTS },
 338         { "tcpopts",            TOK_TCPOPTS },
 339         { "tcpseq",             TOK_TCPSEQ },
 340         { "tcpack",             TOK_TCPACK },
 341         { "tcpwin",             TOK_TCPWIN },
 342         { "icmptype",           TOK_ICMPTYPES },
 343         { "icmptypes",          TOK_ICMPTYPES },
 344         { "dst-ip",             TOK_DSTIP },
 345         { "src-ip",             TOK_SRCIP },
 346         { "dst-port",           TOK_DSTPORT },
 347         { "src-port",           TOK_SRCPORT },
 348         { "proto",              TOK_PROTO },
 349         { "MAC",                TOK_MAC },
 350         { "mac",                TOK_MAC },
 351         { "mac-type",           TOK_MACTYPE },
 352         { "verrevpath",         TOK_VERREVPATH },
 353         { "versrcreach",        TOK_VERSRCREACH },
 354         { "antispoof",          TOK_ANTISPOOF },
 355         { "ipsec",              TOK_IPSEC },
 356         { "icmp6type",          TOK_ICMP6TYPES },
 357         { "icmp6types",         TOK_ICMP6TYPES },
 358         { "ext6hdr",            TOK_EXT6HDR},
 359         { "flow-id",            TOK_FLOWID},
 360         { "ipv6",               TOK_IPV6},
 361         { "ip6",                TOK_IPV6},
 362         { "ipv4",               TOK_IPV4},
 363         { "ip4",                TOK_IPV4},
 364         { "dst-ipv6",           TOK_DSTIP6},
 365         { "dst-ip6",            TOK_DSTIP6},
 366         { "src-ipv6",           TOK_SRCIP6},
 367         { "src-ip6",            TOK_SRCIP6},
 368         { "lookup",             TOK_LOOKUP},
 369         { "flow",               TOK_FLOW},
 370         { "//",                 TOK_COMMENT },
 371
 372         { "not",                TOK_NOT },              /* pseudo option */
 373         { "!", /* escape ? */   TOK_NOT },              /* pseudo option */
 374         { "or",                 TOK_OR },               /* pseudo option */
 375         { "|", /* escape */     TOK_OR },               /* pseudo option */
 376         { "{",                  TOK_STARTBRACE },       /* pseudo option */
 377         { "(",                  TOK_STARTBRACE },       /* pseudo option */
 378         { "}",                  TOK_ENDBRACE },         /* pseudo option */
 379         { ")",                  TOK_ENDBRACE },         /* pseudo option */
 380         { NULL, 0 }     /* terminator */
 381 };
 382
 383 void bprint_uint_arg(struct buf_pr *bp, const char *str, uint32_t arg);
 384 static int ipfw_get_config(struct cmdline_opts *co, struct format_opts *fo,
 385     ipfw_cfg_lheader **pcfg, size_t *psize);
 386 static int ipfw_show_config(struct cmdline_opts *co, struct format_opts *fo,
 387     ipfw_cfg_lheader *cfg, size_t sz, int ac, char **av);
 388 static void ipfw_list_tifaces(void);
 389
 390 struct tidx;
 391 static uint16_t pack_object(struct tidx *tstate, char *name, int otype);
 392 static uint16_t pack_table(struct tidx *tstate, char *name);
 393
 394 static char *table_search_ctlv(ipfw_obj_ctlv *ctlv, uint16_t idx);
 395 static void object_sort_ctlv(ipfw_obj_ctlv *ctlv);
 396 static char *object_search_ctlv(ipfw_obj_ctlv *ctlv, uint16_t idx,
 397     uint16_t type);
 398
 399 /*
 400  * Simple string buffer API.
 401  * Used to simplify buffer passing between function and for
 402  * transparent overrun handling.
 403  */
 404
 405 /*
 406  * Allocates new buffer of given size @sz.
 407  *
 408  * Returns 0 on success.
 409  */
 410 int
 411 bp_alloc(struct buf_pr *b, size_t size)
 412 {
 413         memset(b, 0, sizeof(struct buf_pr));
 414
 415         if ((b->buf = calloc(1, size)) == NULL)
 416                 return (ENOMEM);
 417
 418         b->ptr = b->buf;
 419         b->size = size;
 420         b->avail = b->size;
 421
 422         return (0);
 423 }
 424
 425 void
 426 bp_free(struct buf_pr *b)
 427 {
 428
 429         free(b->buf);
 430 }
 431
 432 /*
 433  * Flushes buffer so new writer start from beginning.
 434  */
 435 void
 436 bp_flush(struct buf_pr *b)
 437 {
 438
 439         b->ptr = b->buf;
 440         b->avail = b->size;
 441         b->buf[0] = '\0';
 442 }
 443
 444 /*
 445  * Print message specified by @format and args.
 446  * Automatically manage buffer space and transparently handle
 447  * buffer overruns.
 448  *
 449  * Returns number of bytes that should have been printed.
 450  */
 451 int
 452 bprintf(struct buf_pr *b, char *format, ...)
 453 {
 454         va_list args;
 455         int i;
 456
 457         va_start(args, format);
 458
 459         i = vsnprintf(b->ptr, b->avail, format, args);
 460         va_end(args);
 461
 462         if (i > b->avail || i < 0) {
 463                 /* Overflow or print error */
 464                 b->avail = 0;
 465         } else {
 466                 b->ptr += i;
 467                 b->avail -= i;
 468         }
 469
 470         b->needed += i;
 471
 472         return (i);
 473 }
 474
 475 /*
 476  * Special values printer for tablearg-aware opcodes.
 477  */
 478 void
 479 bprint_uint_arg(struct buf_pr *bp, const char *str, uint32_t arg)
 480 {
 481
 482         if (str != NULL)
 483                 bprintf(bp, "%s", str);
 484         if (arg == IP_FW_TARG)
 485                 bprintf(bp, "tablearg");
 486         else
 487                 bprintf(bp, "%u", arg);
 488 }
 489
 490 /*
 491  * Helper routine to print a possibly unaligned uint64_t on
 492  * various platform. If width > 0, print the value with
 493  * the desired width, followed by a space;
 494  * otherwise, return the required width.
 495  */
 496 int
 497 pr_u64(struct buf_pr *b, uint64_t *pd, int width)
 498 {
 499 #ifdef TCC
 500 #define U64_FMT "I64"
 501 #else
 502 #define U64_FMT "llu"
 503 #endif
 504         uint64_t u;
 505         unsigned long long d;
 506
 507         bcopy (pd, &u, sizeof(u));
 508         d = u;
 509         return (width > 0) ?
 510                 bprintf(b, "%*" U64_FMT " ", width, d) :
 511                 snprintf(NULL, 0, "%" U64_FMT, d) ;
 512 #undef U64_FMT
 513 }
 514
 515
 516 void *
 517 safe_calloc(size_t number, size_t size)
 518 {
 519         void *ret = calloc(number, size);
 520
 521         if (ret == NULL)
 522                 err(EX_OSERR, "calloc");
 523         return ret;
 524 }
 525
 526 void *
 527 safe_realloc(void *ptr, size_t size)
 528 {
 529         void *ret = realloc(ptr, size);
 530
 531         if (ret == NULL)
 532                 err(EX_OSERR, "realloc");
 533         return ret;
 534 }
 535
 536 /*
 537  * Compare things like interface or table names.
 538  */
 539 int
 540 stringnum_cmp(const char *a, const char *b)
 541 {
 542         int la, lb;
 543
 544         la = strlen(a);
 545         lb = strlen(b);
 546
 547         if (la > lb)
 548                 return (1);
 549         else if (la < lb)
 550                 return (-01);
 551
 552         return (strcmp(a, b));
 553 }
 554
 555
 556 /*
 557  * conditionally runs the command.
 558  * Selected options or negative -> getsockopt
 559  */
 560 int
 561 do_cmd(int optname, void *optval, uintptr_t optlen)
 562 {
 563         int i;
 564
 565         if (co.test_only)
 566                 return 0;
 567
 568         if (ipfw_socket == -1)
 569                 ipfw_socket = socket(AF_INET, SOCK_RAW, IPPROTO_RAW);
 570         if (ipfw_socket < 0)
 571                 err(EX_UNAVAILABLE, "socket");
 572
 573         if (optname == IP_FW_GET || optname == IP_DUMMYNET_GET ||
 574             optname == IP_FW_ADD || optname == IP_FW3 ||
 575             optname == IP_FW_NAT_GET_CONFIG ||
 576             optname < 0 ||
 577             optname == IP_FW_NAT_GET_LOG) {
 578                 if (optname < 0)
 579                         optname = -optname;
 580                 i = getsockopt(ipfw_socket, IPPROTO_IP, optname, optval,
 581                         (socklen_t *)optlen);
 582         } else {
 583                 i = setsockopt(ipfw_socket, IPPROTO_IP, optname, optval, optlen);
 584         }
 585         return i;
 586 }
 587
 588 /*
 589  * do_set3 - pass ipfw control cmd to kernel
 590  * @optname: option name
 591  * @optval: pointer to option data
 592  * @optlen: option length
 593  *
 594  * Assumes op3 header is already embedded.
 595  * Calls setsockopt() with IP_FW3 as kernel-visible opcode.
 596  * Returns 0 on success or errno otherwise.
 597  */
 598 int
 599 do_set3(int optname, ip_fw3_opheader *op3, size_t optlen)
 600 {
 601
 602         if (co.test_only)
 603                 return (0);
 604
 605         if (ipfw_socket == -1)
 606                 ipfw_socket = socket(AF_INET, SOCK_RAW, IPPROTO_RAW);
 607         if (ipfw_socket < 0)
 608                 err(EX_UNAVAILABLE, "socket");
 609
 610         op3->opcode = optname;
 611
 612         return (setsockopt(ipfw_socket, IPPROTO_IP, IP_FW3, op3, optlen));
 613 }
 614
 615 /*
 616  * do_get3 - pass ipfw control cmd to kernel
 617  * @optname: option name
 618  * @optval: pointer to option data
 619  * @optlen: pointer to option length
 620  *
 621  * Assumes op3 header is already embedded.
 622  * Calls getsockopt() with IP_FW3 as kernel-visible opcode.
 623  * Returns 0 on success or errno otherwise.
 624  */
 625 int
 626 do_get3(int optname, ip_fw3_opheader *op3, size_t *optlen)
 627 {
 628         int error;
 629         socklen_t len;
 630
 631         if (co.test_only)
 632                 return (0);
 633
 634         if (ipfw_socket == -1)
 635                 ipfw_socket = socket(AF_INET, SOCK_RAW, IPPROTO_RAW);
 636         if (ipfw_socket < 0)
 637                 err(EX_UNAVAILABLE, "socket");
 638
 639         op3->opcode = optname;
 640
 641         len = *optlen;
 642         error = getsockopt(ipfw_socket, IPPROTO_IP, IP_FW3, op3, &len);
 643         *optlen = len;
 644
 645         return (error);
 646 }
 647
 648 /**
 649  * match_token takes a table and a string, returns the value associated
 650  * with the string (-1 in case of failure).
 651  */
 652 int
 653 match_token(struct _s_x *table, const char *string)
 654 {
 655         struct _s_x *pt;
 656         uint i = strlen(string);
 657
 658         for (pt = table ; i && pt->s != NULL ; pt++)
 659                 if (strlen(pt->s) == i && !bcmp(string, pt->s, i))
 660                         return pt->x;
 661         return (-1);
 662 }
 663
 664 /**
 665  * match_token_relaxed takes a table and a string, returns the value associated
 666  * with the string for the best match.
 667  *
 668  * Returns:
 669  * value from @table for matched records
 670  * -1 for non-matched records
 671  * -2 if more than one records match @string.
 672  */
 673 int
 674 match_token_relaxed(struct _s_x *table, const char *string)
 675 {
 676         struct _s_x *pt, *m;
 677         int i, c;
 678
 679         i = strlen(string);
 680         c = 0;
 681
 682         for (pt = table ; i != 0 && pt->s != NULL ; pt++) {
 683                 if (strncmp(pt->s, string, i) != 0)
 684                         continue;
 685                 m = pt;
 686                 c++;
 687         }
 688
 689         if (c == 1)
 690                 return (m->x);
 691
 692         return (c > 0 ? -2: -1);
 693 }
 694
 695 int
 696 get_token(struct _s_x *table, const char *string, const char *errbase)
 697 {
 698         int tcmd;
 699
 700         if ((tcmd = match_token_relaxed(table, string)) < 0)
 701                 errx(EX_USAGE, "%s %s %s",
 702                     (tcmd == 0) ? "invalid" : "ambiguous", errbase, string);
 703
 704         return (tcmd);
 705 }
 706
 707 /**
 708  * match_value takes a table and a value, returns the string associated
 709  * with the value (NULL in case of failure).
 710  */
 711 char const *
 712 match_value(struct _s_x *p, int value)
 713 {
 714         for (; p->s != NULL; p++)
 715                 if (p->x == value)
 716                         return p->s;
 717         return NULL;
 718 }
 719
 720 size_t
 721 concat_tokens(char *buf, size_t bufsize, struct _s_x *table, char *delimiter)
 722 {
 723         struct _s_x *pt;
 724         int l;
 725         size_t sz;
 726
 727         for (sz = 0, pt = table ; pt->s != NULL; pt++) {
 728                 l = snprintf(buf + sz, bufsize - sz, "%s%s",
 729                     (sz == 0) ? "" : delimiter, pt->s);
 730                 sz += l;
 731                 bufsize += l;
 732                 if (sz > bufsize)
 733                         return (bufsize);
 734         }
 735
 736         return (sz);
 737 }
 738
 739 /*
 740  * helper function to process a set of flags and set bits in the
 741  * appropriate masks.
 742  */
 743 int
 744 fill_flags(struct _s_x *flags, char *p, char **e, uint32_t *set,
 745     uint32_t *clear)
 746 {
 747         char *q;        /* points to the separator */
 748         int val;
 749         uint32_t *which;        /* mask we are working on */
 750
 751         while (p && *p) {
 752                 if (*p == '!') {
 753                         p++;
 754                         which = clear;
 755                 } else
 756                         which = set;
 757                 q = strchr(p, ',');
 758                 if (q)
 759                         *q++ = '\0';
 760                 val = match_token(flags, p);
 761                 if (val <= 0) {
 762                         if (e != NULL)
 763                                 *e = p;
 764                         return (-1);
 765                 }
 766                 *which |= (uint32_t)val;
 767                 p = q;
 768         }
 769         return (0);
 770 }
 771
 772 void
 773 print_flags_buffer(char *buf, size_t sz, struct _s_x *list, uint32_t set)
 774 {
 775         char const *comma = "";
 776         int i, l;
 777
 778         for (i = 0; list[i].x != 0; i++) {
 779                 if ((set & list[i].x) == 0)
 780                         continue;
 781
 782                 set &= ~list[i].x;
 783                 l = snprintf(buf, sz, "%s%s", comma, list[i].s);
 784                 if (l >= sz)
 785                         return;
 786                 comma = ",";
 787                 buf += l;
 788                 sz -=l;
 789         }
 790 }
 791
 792 /*
 793  * _substrcmp takes two strings and returns 1 if they do not match,
 794  * and 0 if they match exactly or the first string is a sub-string
 795  * of the second.  A warning is printed to stderr in the case that the
 796  * first string is a sub-string of the second.
 797  *
 798  * This function will be removed in the future through the usual
 799  * deprecation process.
 800  */
 801 int
 802 _substrcmp(const char *str1, const char* str2)
 803 {
 804
 805         if (strncmp(str1, str2, strlen(str1)) != 0)
 806                 return 1;
 807
 808         if (strlen(str1) != strlen(str2))
 809                 warnx("DEPRECATED: '%s' matched '%s' as a sub-string",
 810                     str1, str2);
 811         return 0;
 812 }
 813
 814 /*
 815  * _substrcmp2 takes three strings and returns 1 if the first two do not match,
 816  * and 0 if they match exactly or the second string is a sub-string
 817  * of the first.  A warning is printed to stderr in the case that the
 818  * first string does not match the third.
 819  *
 820  * This function exists to warn about the bizarre construction
 821  * strncmp(str, "by", 2) which is used to allow people to use a shortcut
 822  * for "bytes".  The problem is that in addition to accepting "by",
 823  * "byt", "byte", and "bytes", it also excepts "by_rabid_dogs" and any
 824  * other string beginning with "by".
 825  *
 826  * This function will be removed in the future through the usual
 827  * deprecation process.
 828  */
 829 int
 830 _substrcmp2(const char *str1, const char* str2, const char* str3)
 831 {
 832
 833         if (strncmp(str1, str2, strlen(str2)) != 0)
 834                 return 1;
 835
 836         if (strcmp(str1, str3) != 0)
 837                 warnx("DEPRECATED: '%s' matched '%s'",
 838                     str1, str3);
 839         return 0;
 840 }
 841
 842 /*
 843  * prints one port, symbolic or numeric
 844  */
 845 static void
 846 print_port(struct buf_pr *bp, int proto, uint16_t port)
 847 {
 848
 849         if (proto == IPPROTO_ETHERTYPE) {
 850                 char const *s;
 851
 852                 if (co.do_resolv && (s = match_value(ether_types, port)) )
 853                         bprintf(bp, "%s", s);
 854                 else
 855                         bprintf(bp, "0x%04x", port);
 856         } else {
 857                 struct servent *se = NULL;
 858                 if (co.do_resolv) {
 859                         struct protoent *pe = getprotobynumber(proto);
 860
 861                         se = getservbyport(htons(port), pe ? pe->p_name : NULL);
 862                 }
 863                 if (se)
 864                         bprintf(bp, "%s", se->s_name);
 865                 else
 866                         bprintf(bp, "%d", port);
 867         }
 868 }
 869
 870 static struct _s_x _port_name[] = {
 871         {"dst-port",    O_IP_DSTPORT},
 872         {"src-port",    O_IP_SRCPORT},
 873         {"ipid",        O_IPID},
 874         {"iplen",       O_IPLEN},
 875         {"ipttl",       O_IPTTL},
 876         {"mac-type",    O_MAC_TYPE},
 877         {"tcpdatalen",  O_TCPDATALEN},
 878         {"tcpwin",      O_TCPWIN},
 879         {"tagged",      O_TAGGED},
 880         {NULL,          0}
 881 };
 882
 883 /*
 884  * Print the values in a list 16-bit items of the types above.
 885  * XXX todo: add support for mask.
 886  */
 887 static void
 888 print_newports(struct buf_pr *bp, ipfw_insn_u16 *cmd, int proto, int opcode)
 889 {
 890         uint16_t *p = cmd->ports;
 891         int i;
 892         char const *sep;
 893
 894         if (opcode != 0) {
 895                 sep = match_value(_port_name, opcode);
 896                 if (sep == NULL)
 897                         sep = "???";
 898                 bprintf(bp, " %s", sep);
 899         }
 900         sep = " ";
 901         for (i = F_LEN((ipfw_insn *)cmd) - 1; i > 0; i--, p += 2) {
 902                 bprintf(bp, "%s", sep);
 903                 print_port(bp, proto, p[0]);
 904                 if (p[0] != p[1]) {
 905                         bprintf(bp, "-");
 906                         print_port(bp, proto, p[1]);
 907                 }
 908                 sep = ",";
 909         }
 910 }
 911
 912 /*
 913  * Like strtol, but also translates service names into port numbers
 914  * for some protocols.
 915  * In particular:
 916  *      proto == -1 disables the protocol check;
 917  *      proto == IPPROTO_ETHERTYPE looks up an internal table
 918  *      proto == <some value in /etc/protocols> matches the values there.
 919  * Returns *end == s in case the parameter is not found.
 920  */
 921 static int
 922 strtoport(char *s, char **end, int base, int proto)
 923 {
 924         char *p, *buf;
 925         char *s1;
 926         int i;
 927
 928         *end = s;               /* default - not found */
 929         if (*s == '\0')
 930                 return 0;       /* not found */
 931
 932         if (isdigit(*s))
 933                 return strtol(s, end, base);
 934
 935         /*
 936          * find separator. '\\' escapes the next char.
 937          */
 938         for (s1 = s; *s1 && (isalnum(*s1) || *s1 == '\\') ; s1++)
 939                 if (*s1 == '\\' && s1[1] != '\0')
 940                         s1++;
 941
 942         buf = safe_calloc(s1 - s + 1, 1);
 943
 944         /*
 945          * copy into a buffer skipping backslashes
 946          */
 947         for (p = s, i = 0; p != s1 ; p++)
 948                 if (*p != '\\')
 949                         buf[i++] = *p;
 950         buf[i++] = '\0';
 951
 952         if (proto == IPPROTO_ETHERTYPE) {
 953                 i = match_token(ether_types, buf);
 954                 free(buf);
 955                 if (i != -1) {  /* found */
 956                         *end = s1;
 957                         return i;
 958                 }
 959         } else {
 960                 struct protoent *pe = NULL;
 961                 struct servent *se;
 962
 963                 if (proto != 0)
 964                         pe = getprotobynumber(proto);
 965                 setservent(1);
 966                 se = getservbyname(buf, pe ? pe->p_name : NULL);
 967                 free(buf);
 968                 if (se != NULL) {
 969                         *end = s1;
 970                         return ntohs(se->s_port);
 971                 }
 972         }
 973         return 0;       /* not found */
 974 }
 975
 976 /*
 977  * Fill the body of the command with the list of port ranges.
 978  */
 979 static int
 980 fill_newports(ipfw_insn_u16 *cmd, char *av, int proto, int cblen)
 981 {
 982         uint16_t a, b, *p = cmd->ports;
 983         int i = 0;
 984         char *s = av;
 985
 986         while (*s) {
 987                 a = strtoport(av, &s, 0, proto);
 988                 if (s == av)                    /* empty or invalid argument */
 989                         return (0);
 990
 991                 CHECK_LENGTH(cblen, i + 2);
 992
 993                 switch (*s) {
 994                 case '-':                       /* a range */
 995                         av = s + 1;
 996                         b = strtoport(av, &s, 0, proto);
 997                         /* Reject expressions like '1-abc' or '1-2-3'. */
 998                         if (s == av || (*s != ',' && *s != '\0'))
 999                                 return (0);
1000                         p[0] = a;
1001                         p[1] = b;
1002                         break;
1003                 case ',':                       /* comma separated list */
1004                 case '\0':
1005                         p[0] = p[1] = a;
1006                         break;
1007                 default:
1008                         warnx("port list: invalid separator <%c> in <%s>",
1009                                 *s, av);
1010                         return (0);
1011                 }
1012
1013                 i++;
1014                 p += 2;
1015                 av = s + 1;
1016         }
1017         if (i > 0) {
1018                 if (i + 1 > F_LEN_MASK)
1019                         errx(EX_DATAERR, "too many ports/ranges\n");
1020                 cmd->o.len |= i + 1;    /* leave F_NOT and F_OR untouched */
1021         }
1022         return (i);
1023 }
1024
1025 /*
1026  * Fill the body of the command with the list of DiffServ codepoints.
1027  */
1028 static void
1029 fill_dscp(ipfw_insn *cmd, char *av, int cblen)
1030 {
1031         uint32_t *low, *high;
1032         char *s = av, *a;
1033         int code;
1034
1035         cmd->opcode = O_DSCP;
1036         cmd->len |= F_INSN_SIZE(ipfw_insn_u32) + 1;
1037
1038         CHECK_CMDLEN;
1039
1040         low = (uint32_t *)(cmd + 1);
1041         high = low + 1;
1042
1043         *low = 0;
1044         *high = 0;
1045
1046         while (s != NULL) {
1047                 a = strchr(s, ',');
1048
1049                 if (a != NULL)
1050                         *a++ = '\0';
1051
1052                 if (isalpha(*s)) {
1053                         if ((code = match_token(f_ipdscp, s)) == -1)
1054                                 errx(EX_DATAERR, "Unknown DSCP code");
1055                 } else {
1056                         code = strtoul(s, NULL, 10);
1057                         if (code < 0 || code > 63)
1058                                 errx(EX_DATAERR, "Invalid DSCP value");
1059                 }
1060
1061                 if (code >= 32)
1062                         *high |= 1 << (code - 32);
1063                 else
1064                         *low |= 1 << code;
1065
1066                 s = a;
1067         }
1068 }
1069
1070 static struct _s_x icmpcodes[] = {
1071       { "net",                  ICMP_UNREACH_NET },
1072       { "host",                 ICMP_UNREACH_HOST },
1073       { "protocol",             ICMP_UNREACH_PROTOCOL },
1074       { "port",                 ICMP_UNREACH_PORT },
1075       { "needfrag",             ICMP_UNREACH_NEEDFRAG },
1076       { "srcfail",              ICMP_UNREACH_SRCFAIL },
1077       { "net-unknown",          ICMP_UNREACH_NET_UNKNOWN },
1078       { "host-unknown",         ICMP_UNREACH_HOST_UNKNOWN },
1079       { "isolated",             ICMP_UNREACH_ISOLATED },
1080       { "net-prohib",           ICMP_UNREACH_NET_PROHIB },
1081       { "host-prohib",          ICMP_UNREACH_HOST_PROHIB },
1082       { "tosnet",               ICMP_UNREACH_TOSNET },
1083       { "toshost",              ICMP_UNREACH_TOSHOST },
1084       { "filter-prohib",        ICMP_UNREACH_FILTER_PROHIB },
1085       { "host-precedence",      ICMP_UNREACH_HOST_PRECEDENCE },
1086       { "precedence-cutoff",    ICMP_UNREACH_PRECEDENCE_CUTOFF },
1087       { NULL, 0 }
1088 };
1089
1090 static void
1091 fill_reject_code(u_short *codep, char *str)
1092 {
1093         int val;
1094         char *s;
1095
1096         val = strtoul(str, &s, 0);
1097         if (s == str || *s != '\0' || val >= 0x100)
1098                 val = match_token(icmpcodes, str);
1099         if (val < 0)
1100                 errx(EX_DATAERR, "unknown ICMP unreachable code ``%s''", str);
1101         *codep = val;
1102         return;
1103 }
1104
1105 static void
1106 print_reject_code(struct buf_pr *bp, uint16_t code)
1107 {
1108         char const *s;
1109
1110         if ((s = match_value(icmpcodes, code)) != NULL)
1111                 bprintf(bp, "unreach %s", s);
1112         else
1113                 bprintf(bp, "unreach %u", code);
1114 }
1115
1116 /*
1117  * Returns the number of bits set (from left) in a contiguous bitmask,
1118  * or -1 if the mask is not contiguous.
1119  * XXX this needs a proper fix.
1120  * This effectively works on masks in big-endian (network) format.
1121  * when compiled on little endian architectures.
1122  *
1123  * First bit is bit 7 of the first byte -- note, for MAC addresses,
1124  * the first bit on the wire is bit 0 of the first byte.
1125  * len is the max length in bits.
1126  */
1127 int
1128 contigmask(uint8_t *p, int len)
1129 {
1130         int i, n;
1131
1132         for (i=0; i<len ; i++)
1133                 if ( (p[i/8] & (1 << (7 - (i%8)))) == 0) /* first bit unset */
1134                         break;
1135         for (n=i+1; n < len; n++)
1136                 if ( (p[n/8] & (1 << (7 - (n%8)))) != 0)
1137                         return -1; /* mask not contiguous */
1138         return i;
1139 }
1140
1141 /*
1142  * print flags set/clear in the two bitmasks passed as parameters.
1143  * There is a specialized check for f_tcpflags.
1144  */
1145 static void
1146 print_flags(struct buf_pr *bp, char const *name, ipfw_insn *cmd,
1147     struct _s_x *list)
1148 {
1149         char const *comma = "";
1150         int i;
1151         uint8_t set = cmd->arg1 & 0xff;
1152         uint8_t clear = (cmd->arg1 >> 8) & 0xff;
1153
1154         if (list == f_tcpflags && set == TH_SYN && clear == TH_ACK) {
1155                 bprintf(bp, " setup");
1156                 return;
1157         }
1158
1159         bprintf(bp, " %s ", name);
1160         for (i=0; list[i].x != 0; i++) {
1161                 if (set & list[i].x) {
1162                         set &= ~list[i].x;
1163                         bprintf(bp, "%s%s", comma, list[i].s);
1164                         comma = ",";
1165                 }
1166                 if (clear & list[i].x) {
1167                         clear &= ~list[i].x;
1168                         bprintf(bp, "%s!%s", comma, list[i].s);
1169                         comma = ",";
1170                 }
1171         }
1172 }
1173
1174
1175 /*
1176  * Print the ip address contained in a command.
1177  */
1178 static void
1179 print_ip(struct buf_pr *bp, const struct format_opts *fo, ipfw_insn_ip *cmd,
1180     char const *s)
1181 {
1182         struct hostent *he = NULL;
1183         struct in_addr *ia;
1184         uint32_t len = F_LEN((ipfw_insn *)cmd);
1185         uint32_t *a = ((ipfw_insn_u32 *)cmd)->d;
1186         char *t;
1187
1188         if (cmd->o.opcode == O_IP_DST_LOOKUP && len > F_INSN_SIZE(ipfw_insn_u32)) {
1189                 uint32_t d = a[1];
1190                 const char *arg = "<invalid>";
1191
1192                 if (d < sizeof(lookup_key)/sizeof(lookup_key[0]))
1193                         arg = match_value(rule_options, lookup_key[d]);
1194                 t = table_search_ctlv(fo->tstate, ((ipfw_insn *)cmd)->arg1);
1195                 bprintf(bp, " lookup %s %s", arg, t);
1196                 return;
1197         }
1198         bprintf(bp, "%s ", s);
1199
1200         if (cmd->o.opcode == O_IP_SRC_ME || cmd->o.opcode == O_IP_DST_ME) {
1201                 bprintf(bp, "me");
1202                 return;
1203         }
1204         if (cmd->o.opcode == O_IP_SRC_LOOKUP ||
1205             cmd->o.opcode == O_IP_DST_LOOKUP) {
1206                 t = table_search_ctlv(fo->tstate, ((ipfw_insn *)cmd)->arg1);
1207                 bprintf(bp, "table(%s", t);
1208                 if (len == F_INSN_SIZE(ipfw_insn_u32))
1209                         bprintf(bp, ",%u", *a);
1210                 bprintf(bp, ")");
1211                 return;
1212         }
1213         if (cmd->o.opcode == O_IP_SRC_SET || cmd->o.opcode == O_IP_DST_SET) {
1214                 uint32_t x, *map = (uint32_t *)&(cmd->mask);
1215                 int i, j;
1216                 char comma = '{';
1217
1218                 x = cmd->o.arg1 - 1;
1219                 x = htonl( ~x );
1220                 cmd->addr.s_addr = htonl(cmd->addr.s_addr);
1221                 bprintf(bp, "%s/%d", inet_ntoa(cmd->addr),
1222                         contigmask((uint8_t *)&x, 32));
1223                 x = cmd->addr.s_addr = htonl(cmd->addr.s_addr);
1224                 x &= 0xff; /* base */
1225                 /*
1226                  * Print bits and ranges.
1227                  * Locate first bit set (i), then locate first bit unset (j).
1228                  * If we have 3+ consecutive bits set, then print them as a
1229                  * range, otherwise only print the initial bit and rescan.
1230                  */
1231                 for (i=0; i < cmd->o.arg1; i++)
1232                         if (map[i/32] & (1<<(i & 31))) {
1233                                 for (j=i+1; j < cmd->o.arg1; j++)
1234                                         if (!(map[ j/32] & (1<<(j & 31))))
1235                                                 break;
1236                                 bprintf(bp, "%c%d", comma, i+x);
1237                                 if (j>i+2) { /* range has at least 3 elements */
1238                                         bprintf(bp, "-%d", j-1+x);
1239                                         i = j-1;
1240                                 }
1241                                 comma = ',';
1242                         }
1243                 bprintf(bp, "}");
1244                 return;
1245         }
1246         /*
1247          * len == 2 indicates a single IP, whereas lists of 1 or more
1248          * addr/mask pairs have len = (2n+1). We convert len to n so we
1249          * use that to count the number of entries.
1250          */
1251     for (len = len / 2; len > 0; len--, a += 2) {
1252         int mb =        /* mask length */
1253             (cmd->o.opcode == O_IP_SRC || cmd->o.opcode == O_IP_DST) ?
1254                 32 : contigmask((uint8_t *)&(a[1]), 32);
1255         if (mb == 32 && co.do_resolv)
1256                 he = gethostbyaddr((char *)&(a[0]), sizeof(u_long), AF_INET);
1257         if (he != NULL)         /* resolved to name */
1258                 bprintf(bp, "%s", he->h_name);
1259         else if (mb == 0)       /* any */
1260                 bprintf(bp, "any");
1261         else {          /* numeric IP followed by some kind of mask */
1262                 ia = (struct in_addr *)&a[0];
1263                 bprintf(bp, "%s", inet_ntoa(*ia));
1264                 if (mb < 0) {
1265                         ia = (struct in_addr *)&a[1];
1266                         bprintf(bp, ":%s", inet_ntoa(*ia));
1267                 } else if (mb < 32)
1268                         bprintf(bp, "/%d", mb);
1269         }
1270         if (len > 1)
1271                 bprintf(bp, ",");
1272     }
1273 }
1274
1275 /*
1276  * prints a MAC address/mask pair
1277  */
1278 static void
1279 format_mac(struct buf_pr *bp, uint8_t *addr, uint8_t *mask)
1280 {
1281         int l = contigmask(mask, 48);
1282
1283         if (l == 0)
1284                 bprintf(bp, " any");
1285         else {
1286                 bprintf(bp, " %02x:%02x:%02x:%02x:%02x:%02x",
1287                     addr[0], addr[1], addr[2], addr[3], addr[4], addr[5]);
1288                 if (l == -1)
1289                         bprintf(bp, "&%02x:%02x:%02x:%02x:%02x:%02x",
1290                             mask[0], mask[1], mask[2],
1291                             mask[3], mask[4], mask[5]);
1292                 else if (l < 48)
1293                         bprintf(bp, "/%d", l);
1294         }
1295 }
1296
1297 static void
1298 print_mac(struct buf_pr *bp, ipfw_insn_mac *mac)
1299 {
1300
1301         bprintf(bp, " MAC");
1302         format_mac(bp, mac->addr, mac->mask);
1303         format_mac(bp, mac->addr + 6, mac->mask + 6);
1304 }
1305
1306 static void
1307 fill_icmptypes(ipfw_insn_u32 *cmd, char *av)
1308 {
1309         uint8_t type;
1310
1311         cmd->d[0] = 0;
1312         while (*av) {
1313                 if (*av == ',')
1314                         av++;
1315
1316                 type = strtoul(av, &av, 0);
1317
1318                 if (*av != ',' && *av != '\0')
1319                         errx(EX_DATAERR, "invalid ICMP type");
1320
1321                 if (type > 31)
1322                         errx(EX_DATAERR, "ICMP type out of range");
1323
1324                 cmd->d[0] |= 1 << type;
1325         }
1326         cmd->o.opcode = O_ICMPTYPE;
1327         cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32);
1328 }
1329
1330 static void
1331 print_icmptypes(struct buf_pr *bp, ipfw_insn_u32 *cmd)
1332 {
1333         int i;
1334         char sep= ' ';
1335
1336         bprintf(bp, " icmptypes");
1337         for (i = 0; i < 32; i++) {
1338                 if ( (cmd->d[0] & (1 << (i))) == 0)
1339                         continue;
1340                 bprintf(bp, "%c%d", sep, i);
1341                 sep = ',';
1342         }
1343 }
1344
1345 static void
1346 print_dscp(struct buf_pr *bp, ipfw_insn_u32 *cmd)
1347 {
1348         int i = 0;
1349         uint32_t *v;
1350         char sep= ' ';
1351         const char *code;
1352
1353         bprintf(bp, " dscp");
1354         v = cmd->d;
1355         while (i < 64) {
1356                 if (*v & (1 << i)) {
1357                         if ((code = match_value(f_ipdscp, i)) != NULL)
1358                                 bprintf(bp, "%c%s", sep, code);
1359                         else
1360                                 bprintf(bp, "%c%d", sep, i);
1361                         sep = ',';
1362                 }
1363
1364                 if ((++i % 32) == 0)
1365                         v++;
1366         }
1367 }
1368
1369 #define insntod(cmd, type)      ((ipfw_insn_ ## type *)(cmd))
1370 struct show_state {
1371         struct ip_fw_rule       *rule;
1372         const ipfw_insn         *eaction;
1373         uint8_t                 *printed;
1374         int                     flags;
1375 #define HAVE_PROTO      0x0001
1376 #define HAVE_SRCIP      0x0002
1377 #define HAVE_DSTIP      0x0004
1378         int                     proto;
1379         int                     or_block;
1380 };
1381
1382 static int
1383 init_show_state(struct show_state *state, struct ip_fw_rule *rule)
1384 {
1385
1386         state->printed = calloc(rule->cmd_len, sizeof(uint8_t));
1387         if (state->printed == NULL)
1388                 return (ENOMEM);
1389         state->rule = rule;
1390         state->eaction = NULL;
1391         state->flags = 0;
1392         state->proto = 0;
1393         state->or_block = 0;
1394         return (0);
1395 }
1396
1397 static void
1398 free_show_state(struct show_state *state)
1399 {
1400
1401         free(state->printed);
1402 }
1403
1404 static uint8_t
1405 is_printed_opcode(struct show_state *state, const ipfw_insn *cmd)
1406 {
1407
1408         return (state->printed[cmd - state->rule->cmd]);
1409 }
1410
1411 static void
1412 mark_printed(struct show_state *state, const ipfw_insn *cmd)
1413 {
1414
1415         state->printed[cmd - state->rule->cmd] = 1;
1416 }
1417
1418 static void
1419 print_limit(struct buf_pr *bp, const ipfw_insn_limit *limit)
1420 {
1421         struct _s_x *p = limit_masks;
1422         char const *comma = " ";
1423         uint8_t x;
1424
1425         bprintf(bp, " limit");
1426         for (x = limit->limit_mask; p->x != 0; p++) {
1427                 if ((x & p->x) == p->x) {
1428                         x &= ~p->x;
1429                         bprintf(bp, "%s%s", comma, p->s);
1430                         comma = ",";
1431                 }
1432         }
1433         bprint_uint_arg(bp, " ", limit->conn_limit);
1434 }
1435
1436 static int
1437 print_instruction(struct buf_pr *bp, const struct format_opts *fo,
1438     struct show_state *state, ipfw_insn *cmd)
1439 {
1440         struct protoent *pe;
1441         struct passwd *pwd;
1442         struct group *grp;
1443         const char *s;
1444         double d;
1445
1446         if (is_printed_opcode(state, cmd))
1447                 return (0);
1448         if ((cmd->len & F_OR) != 0 && state->or_block == 0)
1449                 bprintf(bp, " {");
1450         if (cmd->opcode != O_IN && (cmd->len & F_NOT) != 0)
1451                 bprintf(bp, " not");
1452
1453         switch (cmd->opcode) {
1454         case O_PROB:
1455                 d = 1.0 * insntod(cmd, u32)->d[0] / 0x7fffffff;
1456                 bprintf(bp, "prob %f ", d);
1457                 break;
1458         case O_PROBE_STATE: /* no need to print anything here */
1459                 break;
1460         case O_IP_SRC:
1461         case O_IP_SRC_LOOKUP:
1462         case O_IP_SRC_MASK:
1463         case O_IP_SRC_ME:
1464         case O_IP_SRC_SET:
1465         case O_IP_DST:
1466         case O_IP_DST_LOOKUP:
1467         case O_IP_DST_MASK:
1468         case O_IP_DST_ME:
1469         case O_IP_DST_SET:
1470                 print_ip(bp, fo, insntod(cmd, ip), "");
1471                 break;
1472         case O_IP6_SRC:
1473         case O_IP6_SRC_MASK:
1474         case O_IP6_SRC_ME:
1475         case O_IP6_DST:
1476         case O_IP6_DST_MASK:
1477         case O_IP6_DST_ME:
1478                 print_ip6(bp, insntod(cmd, ip6), "");
1479                 break;
1480         case O_FLOW6ID:
1481                 print_flow6id(bp, insntod(cmd, u32));
1482                 break;
1483         case O_IP_DSTPORT:
1484         case O_IP_SRCPORT:
1485                 print_newports(bp, insntod(cmd, u16), state->proto,
1486                     (state->flags & (HAVE_SRCIP | HAVE_DSTIP)) ==
1487                     (HAVE_SRCIP | HAVE_DSTIP) ?  cmd->opcode: 0);
1488                 break;
1489         case O_PROTO:
1490                 pe = getprotobynumber(cmd->arg1);
1491                 if (state->flags & HAVE_PROTO)
1492                         bprintf(bp, " proto");
1493                 if (pe != NULL)
1494                         bprintf(bp, " %s", pe->p_name);
1495                 else
1496                         bprintf(bp, " %u", cmd->arg1);
1497                 break;
1498         case O_MACADDR2:
1499                 print_mac(bp, insntod(cmd, mac));
1500                 break;
1501         case O_MAC_TYPE:
1502                 print_newports(bp, insntod(cmd, u16),
1503                     IPPROTO_ETHERTYPE, cmd->opcode);
1504                 break;
1505         case O_FRAG:
1506                 bprintf(bp, " frag");
1507                 break;
1508         case O_FIB:
1509                 bprintf(bp, " fib %u", cmd->arg1);
1510                 break;
1511         case O_SOCKARG:
1512                 bprintf(bp, " sockarg");
1513                 break;
1514         case O_IN:
1515                 bprintf(bp, cmd->len & F_NOT ? " out" : " in");
1516                 break;
1517         case O_DIVERTED:
1518                 switch (cmd->arg1) {
1519                 case 3:
1520                         bprintf(bp, " diverted");
1521                         break;
1522                 case 2:
1523                         bprintf(bp, " diverted-output");
1524                         break;
1525                 case 1:
1526                         bprintf(bp, " diverted-loopback");
1527                         break;
1528                 default:
1529                         bprintf(bp, " diverted-?<%u>", cmd->arg1);
1530                         break;
1531                 }
1532                 break;
1533         case O_LAYER2:
1534                 bprintf(bp, " layer2");
1535                 break;
1536         case O_XMIT:
1537         case O_RECV:
1538         case O_VIA:
1539                 if (cmd->opcode == O_XMIT)
1540                         s = "xmit";
1541                 else if (cmd->opcode == O_RECV)
1542                         s = "recv";
1543                 else /* if (cmd->opcode == O_VIA) */
1544                         s = "via";
1545                 switch (insntod(cmd, if)->name[0]) {
1546                 case '\0':
1547                         bprintf(bp, " %s %s", s,
1548                             inet_ntoa(insntod(cmd, if)->p.ip));
1549                         break;
1550                 case '\1':
1551                         bprintf(bp, " %s table(%s)", s,
1552                             table_search_ctlv(fo->tstate,
1553                             insntod(cmd, if)->p.kidx));
1554                         break;
1555                 default:
1556                         bprintf(bp, " %s %s", s,
1557                             insntod(cmd, if)->name);
1558                 }
1559                 break;
1560         case O_IP_FLOW_LOOKUP:
1561                 s = table_search_ctlv(fo->tstate, cmd->arg1);
1562                 bprintf(bp, " flow table(%s", s);
1563                 if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_u32))
1564                         bprintf(bp, ",%u", insntod(cmd, u32)->d[0]);
1565                 bprintf(bp, ")");
1566                 break;
1567         case O_IPID:
1568         case O_IPTTL:
1569         case O_IPLEN:
1570         case O_TCPDATALEN:
1571         case O_TCPWIN:
1572                 if (F_LEN(cmd) == 1) {
1573                         switch (cmd->opcode) {
1574                         case O_IPID:
1575                                 s = "ipid";
1576                                 break;
1577                         case O_IPTTL:
1578                                 s = "ipttl";
1579                                 break;
1580                         case O_IPLEN:
1581                                 s = "iplen";
1582                                 break;
1583                         case O_TCPDATALEN:
1584                                 s = "tcpdatalen";
1585                                 break;
1586                         case O_TCPWIN:
1587                                 s = "tcpwin";
1588                                 break;
1589                         }
1590                         bprintf(bp, " %s %u", s, cmd->arg1);
1591                 } else
1592                         print_newports(bp, insntod(cmd, u16), 0,
1593                             cmd->opcode);
1594                 break;
1595         case O_IPVER:
1596                 bprintf(bp, " ipver %u", cmd->arg1);
1597                 break;
1598         case O_IPPRECEDENCE:
1599                 bprintf(bp, " ipprecedence %u", cmd->arg1 >> 5);
1600                 break;
1601         case O_DSCP:
1602                 print_dscp(bp, insntod(cmd, u32));
1603                 break;
1604         case O_IPOPT:
1605                 print_flags(bp, "ipoptions", cmd, f_ipopts);
1606                 break;
1607         case O_IPTOS:
1608                 print_flags(bp, "iptos", cmd, f_iptos);
1609                 break;
1610         case O_ICMPTYPE:
1611                 print_icmptypes(bp, insntod(cmd, u32));
1612                 break;
1613         case O_ESTAB:
1614                 bprintf(bp, " established");
1615                 break;
1616         case O_TCPFLAGS:
1617                 print_flags(bp, "tcpflags", cmd, f_tcpflags);
1618                 break;
1619         case O_TCPOPTS:
1620                 print_flags(bp, "tcpoptions", cmd, f_tcpopts);
1621                 break;
1622         case O_TCPACK:
1623                 bprintf(bp, " tcpack %d",
1624                     ntohl(insntod(cmd, u32)->d[0]));
1625                 break;
1626         case O_TCPSEQ:
1627                 bprintf(bp, " tcpseq %d",
1628                     ntohl(insntod(cmd, u32)->d[0]));
1629                 break;
1630         case O_UID:
1631                 pwd = getpwuid(insntod(cmd, u32)->d[0]);
1632                 if (pwd != NULL)
1633                         bprintf(bp, " uid %s", pwd->pw_name);
1634                 else
1635                         bprintf(bp, " uid %u",
1636                             insntod(cmd, u32)->d[0]);
1637                 break;
1638         case O_GID:
1639                 grp = getgrgid(insntod(cmd, u32)->d[0]);
1640                 if (grp != NULL)
1641                         bprintf(bp, " gid %s", grp->gr_name);
1642                 else
1643                         bprintf(bp, " gid %u",
1644                             insntod(cmd, u32)->d[0]);
1645                 break;
1646         case O_JAIL:
1647                 bprintf(bp, " jail %d", insntod(cmd, u32)->d[0]);
1648                 break;
1649         case O_VERREVPATH:
1650                 bprintf(bp, " verrevpath");
1651                 break;
1652         case O_VERSRCREACH:
1653                 bprintf(bp, " versrcreach");
1654                 break;
1655         case O_ANTISPOOF:
1656                 bprintf(bp, " antispoof");
1657                 break;
1658         case O_IPSEC:
1659                 bprintf(bp, " ipsec");
1660                 break;
1661         case O_NOP:
1662                 bprintf(bp, " // %s", (char *)(cmd + 1));
1663                 break;
1664         case O_KEEP_STATE:
1665                 bprintf(bp, " keep-state");
1666                 bprintf(bp, " :%s",
1667                     object_search_ctlv(fo->tstate, cmd->arg1,
1668                     IPFW_TLV_STATE_NAME));
1669                 break;
1670         case O_LIMIT:
1671                 print_limit(bp, insntod(cmd, limit));
1672                 bprintf(bp, " :%s",
1673                     object_search_ctlv(fo->tstate, cmd->arg1,
1674                     IPFW_TLV_STATE_NAME));
1675                 break;
1676         case O_IP6:
1677                 bprintf(bp, " ip6");
1678                 break;
1679         case O_IP4:
1680                 bprintf(bp, " ip4");
1681                 break;
1682         case O_ICMP6TYPE:
1683                 print_icmp6types(bp, insntod(cmd, u32));
1684                 break;
1685         case O_EXT_HDR:
1686                 print_ext6hdr(bp, cmd);
1687                 break;
1688         case O_TAGGED:
1689                 if (F_LEN(cmd) == 1)
1690                         bprint_uint_arg(bp, " tagged ", cmd->arg1);
1691                 else
1692                         print_newports(bp, insntod(cmd, u16),
1693                                     0, O_TAGGED);
1694                 break;
1695         default:
1696                 bprintf(bp, " [opcode %d len %d]", cmd->opcode,
1697                     cmd->len);
1698         }
1699         if (cmd->len & F_OR) {
1700                 bprintf(bp, " or");
1701                 state->or_block = 1;
1702         } else if (state->or_block != 0) {
1703                 bprintf(bp, " }");
1704                 state->or_block = 0;
1705         }
1706         mark_printed(state, cmd);
1707
1708         return (1);
1709 }
1710
1711 static ipfw_insn *
1712 print_opcode(struct buf_pr *bp, struct format_opts *fo,
1713     struct show_state *state, uint8_t opcode)
1714 {
1715         ipfw_insn *cmd;
1716         int l;
1717
1718         for (l = state->rule->act_ofs, cmd = state->rule->cmd;
1719             l > 0; l -= F_LEN(cmd), cmd += F_LEN(cmd)) {
1720                 /* We use zero opcode to print the rest of options */
1721                 if (opcode != 0 && cmd->opcode != opcode)
1722                         continue;
1723                 /*
1724                  * Skip O_NOP, when we printing the rest
1725                  * of options, it will be handled separately.
1726                  */
1727                 if (cmd->opcode == O_NOP && opcode != O_NOP)
1728                         continue;
1729                 if (!print_instruction(bp, fo, state, cmd))
1730                         continue;
1731                 return (cmd);
1732         }
1733         return (NULL);
1734 }
1735
1736 static void
1737 print_fwd(struct buf_pr *bp, const ipfw_insn *cmd)
1738 {
1739         char buf[INET6_ADDRSTRLEN + IF_NAMESIZE + 2];
1740         ipfw_insn_sa6 *sa6;
1741         ipfw_insn_sa *sa;
1742         uint16_t port;
1743
1744         if (cmd->opcode == O_FORWARD_IP) {
1745                 sa = insntod(cmd, sa);
1746                 port = sa->sa.sin_port;
1747                 if (sa->sa.sin_addr.s_addr == INADDR_ANY)
1748                         bprintf(bp, "fwd tablearg");
1749                 else
1750                         bprintf(bp, "fwd %s", inet_ntoa(sa->sa.sin_addr));
1751         } else {
1752                 sa6 = insntod(cmd, sa6);
1753                 port = sa6->sa.sin6_port;
1754                 bprintf(bp, "fwd ");
1755                 if (getnameinfo((const struct sockaddr *)&sa6->sa,
1756                     sizeof(struct sockaddr_in6), buf, sizeof(buf), NULL, 0,
1757                     NI_NUMERICHOST) == 0)
1758                         bprintf(bp, "%s", buf);
1759         }
1760         if (port != 0)
1761                 bprintf(bp, ",%u", port);
1762 }
1763
1764 static int
1765 print_action_instruction(struct buf_pr *bp, const struct format_opts *fo,
1766     struct show_state *state, const ipfw_insn *cmd)
1767 {
1768         const char *s;
1769
1770         if (is_printed_opcode(state, cmd))
1771                 return (0);
1772         switch (cmd->opcode) {
1773         case O_CHECK_STATE:
1774                 bprintf(bp, "check-state");
1775                 if (cmd->arg1 != 0)
1776                         s = object_search_ctlv(fo->tstate, cmd->arg1,
1777                             IPFW_TLV_STATE_NAME);
1778                 else
1779                         s = NULL;
1780                 bprintf(bp, " :%s", s ? s: "any");
1781                 break;
1782         case O_ACCEPT:
1783                 bprintf(bp, "allow");
1784                 break;
1785         case O_COUNT:
1786                 bprintf(bp, "count");
1787                 break;
1788         case O_DENY:
1789                 bprintf(bp, "deny");
1790                 break;
1791         case O_REJECT:
1792                 if (cmd->arg1 == ICMP_REJECT_RST)
1793                         bprintf(bp, "reset");
1794                 else if (cmd->arg1 == ICMP_REJECT_ABORT)
1795                         bprintf(bp, "abort");
1796                 else if (cmd->arg1 == ICMP_UNREACH_HOST)
1797                         bprintf(bp, "reject");
1798                 else
1799                         print_reject_code(bp, cmd->arg1);
1800                 break;
1801         case O_UNREACH6:
1802                 if (cmd->arg1 == ICMP6_UNREACH_RST)
1803                         bprintf(bp, "reset6");
1804                 else if (cmd->arg1 == ICMP6_UNREACH_ABORT)
1805                         bprintf(bp, "abort6");
1806                 else
1807                         print_unreach6_code(bp, cmd->arg1);
1808                 break;
1809         case O_SKIPTO:
1810                 bprint_uint_arg(bp, "skipto ", cmd->arg1);
1811                 break;
1812         case O_PIPE:
1813                 bprint_uint_arg(bp, "pipe ", cmd->arg1);
1814                 break;
1815         case O_QUEUE:
1816                 bprint_uint_arg(bp, "queue ", cmd->arg1);
1817                 break;
1818         case O_DIVERT:
1819                 bprint_uint_arg(bp, "divert ", cmd->arg1);
1820                 break;
1821         case O_TEE:
1822                 bprint_uint_arg(bp, "tee ", cmd->arg1);
1823                 break;
1824         case O_NETGRAPH:
1825                 bprint_uint_arg(bp, "netgraph ", cmd->arg1);
1826                 break;
1827         case O_NGTEE:
1828                 bprint_uint_arg(bp, "ngtee ", cmd->arg1);
1829                 break;
1830         case O_FORWARD_IP:
1831         case O_FORWARD_IP6:
1832                 print_fwd(bp, cmd);
1833                 break;
1834         case O_LOG:
1835                 if (insntod(cmd, log)->max_log > 0)
1836                         bprintf(bp, " log logamount %d",
1837                             insntod(cmd, log)->max_log);
1838                 else
1839                         bprintf(bp, " log");
1840                 break;
1841         case O_ALTQ:
1842 #ifndef NO_ALTQ
1843                 print_altq_cmd(bp, insntod(cmd, altq));
1844 #endif
1845                 break;
1846         case O_TAG:
1847                 bprint_uint_arg(bp, cmd->len & F_NOT ? " untag ":
1848                     " tag ", cmd->arg1);
1849                 break;
1850         case O_NAT:
1851                 if (cmd->arg1 != IP_FW_NAT44_GLOBAL)
1852                         bprint_uint_arg(bp, "nat ", cmd->arg1);
1853                 else
1854                         bprintf(bp, "nat global");
1855                 break;
1856         case O_SETFIB:
1857                 if (cmd->arg1 == IP_FW_TARG)
1858                         bprint_uint_arg(bp, "setfib ", cmd->arg1);
1859                 else
1860                         bprintf(bp, "setfib %u", cmd->arg1 & 0x7FFF);
1861                 break;
1862         case O_EXTERNAL_ACTION:
1863                 /*
1864                  * The external action can consists of two following
1865                  * each other opcodes - O_EXTERNAL_ACTION and
1866                  * O_EXTERNAL_INSTANCE. The first contains the ID of
1867                  * name of external action. The second contains the ID
1868                  * of name of external action instance.
1869                  * NOTE: in case when external action has no named
1870                  * instances support, the second opcode isn't needed.
1871                  */
1872                 state->eaction = cmd;
1873                 s = object_search_ctlv(fo->tstate, cmd->arg1,
1874                     IPFW_TLV_EACTION);
1875                 if (match_token(rule_eactions, s) != -1)
1876                         bprintf(bp, "%s", s);
1877                 else
1878                         bprintf(bp, "eaction %s", s);
1879                 break;
1880         case O_EXTERNAL_INSTANCE:
1881                 if (state->eaction == NULL)
1882                         break;
1883                 /*
1884                  * XXX: we need to teach ipfw(9) to rewrite opcodes
1885                  * in the user buffer on rule addition. When we add
1886                  * the rule, we specify zero TLV type for
1887                  * O_EXTERNAL_INSTANCE object. To show correct
1888                  * rule after `ipfw add` we need to search instance
1889                  * name with zero type. But when we do `ipfw show`
1890                  * we calculate TLV type using IPFW_TLV_EACTION_NAME()
1891                  * macro.
1892                  */
1893                 s = object_search_ctlv(fo->tstate, cmd->arg1, 0);
1894                 if (s == NULL)
1895                         s = object_search_ctlv(fo->tstate,
1896                             cmd->arg1, IPFW_TLV_EACTION_NAME(
1897                             state->eaction->arg1));
1898                 bprintf(bp, " %s", s);
1899                 break;
1900         case O_EXTERNAL_DATA:
1901                 if (state->eaction == NULL)
1902                         break;
1903                 /*
1904                  * Currently we support data formatting only for
1905                  * external data with datalen u16. For unknown data
1906                  * print its size in bytes.
1907                  */
1908                 if (cmd->len == F_INSN_SIZE(ipfw_insn))
1909                         bprintf(bp, " %u", cmd->arg1);
1910                 else
1911                         bprintf(bp, " %ubytes",
1912                             cmd->len * sizeof(uint32_t));
1913                 break;
1914         case O_SETDSCP:
1915                 if (cmd->arg1 == IP_FW_TARG) {
1916                         bprintf(bp, "setdscp tablearg");
1917                         break;
1918                 }
1919                 s = match_value(f_ipdscp, cmd->arg1 & 0x3F);
1920                 if (s != NULL)
1921                         bprintf(bp, "setdscp %s", s);
1922                 else
1923                         bprintf(bp, "setdscp %s", cmd->arg1 & 0x3F);
1924                 break;
1925         case O_REASS:
1926                 bprintf(bp, "reass");
1927                 break;
1928         case O_CALLRETURN:
1929                 if (cmd->len & F_NOT)
1930                         bprintf(bp, "return");
1931                 else
1932                         bprint_uint_arg(bp, "call ", cmd->arg1);
1933                 break;
1934         default:
1935                 bprintf(bp, "** unrecognized action %d len %d ",
1936                         cmd->opcode, cmd->len);
1937         }
1938         mark_printed(state, cmd);
1939
1940         return (1);
1941 }
1942
1943
1944 static ipfw_insn *
1945 print_action(struct buf_pr *bp, struct format_opts *fo,
1946     struct show_state *state, uint8_t opcode)
1947 {
1948         ipfw_insn *cmd;
1949         int l;
1950
1951         for (l = state->rule->cmd_len - state->rule->act_ofs,
1952             cmd = ACTION_PTR(state->rule); l > 0;
1953             l -= F_LEN(cmd), cmd += F_LEN(cmd)) {
1954                 if (cmd->opcode != opcode)
1955                         continue;
1956                 if (!print_action_instruction(bp, fo, state, cmd))
1957                         continue;
1958                 return (cmd);
1959         }
1960         return (NULL);
1961 }
1962
1963 static void
1964 print_proto(struct buf_pr *bp, struct format_opts *fo,
1965     struct show_state *state)
1966 {
1967         ipfw_insn *cmd;
1968         int l, proto, ip4, ip6, tmp;
1969
1970         /* Count all O_PROTO, O_IP4, O_IP6 instructions. */
1971         proto = tmp = ip4 = ip6 = 0;
1972         for (l = state->rule->act_ofs, cmd = state->rule->cmd;
1973             l > 0; l -= F_LEN(cmd), cmd += F_LEN(cmd)) {
1974                 switch (cmd->opcode) {
1975                 case O_PROTO:
1976                         proto++;
1977                         break;
1978                 case O_IP4:
1979                         ip4 = 1;
1980                         if (cmd->len & F_OR)
1981                                 ip4++;
1982                         break;
1983                 case O_IP6:
1984                         ip6 = 1;
1985                         if (cmd->len & F_OR)
1986                                 ip6++;
1987                         break;
1988                 default:
1989                         continue;
1990                 }
1991         }
1992         if (proto == 0 && ip4 == 0 && ip6 == 0) {
1993                 state->proto = IPPROTO_IP;
1994                 state->flags |= HAVE_PROTO;
1995                 bprintf(bp, " ip");
1996                 return;
1997         }
1998         /* To handle the case { ip4 or ip6 }, print opcode with F_OR first */
1999         cmd = NULL;
2000         if (ip4 || ip6)
2001                 cmd = print_opcode(bp, fo, state, ip4 > ip6 ? O_IP4: O_IP6);
2002         if (cmd != NULL && (cmd->len & F_OR))
2003                 cmd = print_opcode(bp, fo, state, ip4 > ip6 ? O_IP6: O_IP4);
2004         if (cmd == NULL || (cmd->len & F_OR))
2005                 for (l = proto; l > 0; l--) {
2006                         cmd = print_opcode(bp, fo, state, O_PROTO);
2007                         if (cmd != NULL && (cmd->len & F_OR) == 0)
2008                                 break;
2009                         tmp = cmd->arg1;
2010                 }
2011         /* Initialize proto, it is used by print_newports() */
2012         if (tmp != 0)
2013                 state->proto = tmp;
2014         else if (ip6 != 0)
2015                 state->proto = IPPROTO_IPV6;
2016         else
2017                 state->proto = IPPROTO_IP;
2018         state->flags |= HAVE_PROTO;
2019 }
2020
2021 static int
2022 match_opcode(int opcode, const int opcodes[], size_t nops)
2023 {
2024         int i;
2025
2026         for (i = 0; i < nops; i++)
2027                 if (opcode == opcodes[i])
2028                         return (1);
2029         return (0);
2030 }
2031
2032 static void
2033 print_address(struct buf_pr *bp, struct format_opts *fo,
2034     struct show_state *state, const int opcodes[], size_t nops, int portop,
2035     int flag)
2036 {
2037         ipfw_insn *cmd;
2038         int count, l, portcnt, pf;
2039
2040         count = portcnt = 0;
2041         for (l = state->rule->act_ofs, cmd = state->rule->cmd;
2042             l > 0; l -= F_LEN(cmd), cmd += F_LEN(cmd)) {
2043                 if (match_opcode(cmd->opcode, opcodes, nops))
2044                         count++;
2045                 else if (cmd->opcode == portop)
2046                         portcnt++;
2047         }
2048         if (count == 0)
2049                 bprintf(bp, " any");
2050         for (l = state->rule->act_ofs, cmd = state->rule->cmd;
2051             l > 0 && count > 0; l -= F_LEN(cmd), cmd += F_LEN(cmd)) {
2052                 if (!match_opcode(cmd->opcode, opcodes, nops))
2053                         continue;
2054                 print_instruction(bp, fo, state, cmd);
2055                 if ((cmd->len & F_OR) == 0)
2056                         break;
2057                 count--;
2058         }
2059         /*
2060          * If several O_IP_?PORT opcodes specified, leave them to the
2061          * options section.
2062          */
2063         if (portcnt == 1) {
2064                 for (l = state->rule->act_ofs, cmd = state->rule->cmd, pf = 0;
2065                     l > 0; l -= F_LEN(cmd), cmd += F_LEN(cmd)) {
2066                         if (cmd->opcode != portop) {
2067                                 pf = (cmd->len & F_OR);
2068                                 continue;
2069                         }
2070                         /* Print opcode iff it is not in OR block. */
2071                         if (pf == 0 && (cmd->len & F_OR) == 0)
2072                                 print_instruction(bp, fo, state, cmd);
2073                         break;
2074                 }
2075         }
2076         state->flags |= flag;
2077 }
2078
2079 static const int action_opcodes[] = {
2080         O_CHECK_STATE, O_ACCEPT, O_COUNT, O_DENY, O_REJECT,
2081         O_UNREACH6, O_SKIPTO, O_PIPE, O_QUEUE, O_DIVERT, O_TEE,
2082         O_NETGRAPH, O_NGTEE, O_FORWARD_IP, O_FORWARD_IP6, O_NAT,
2083         O_SETFIB, O_SETDSCP, O_REASS, O_CALLRETURN,
2084         /* keep the following opcodes at the end of the list */
2085         O_EXTERNAL_ACTION, O_EXTERNAL_INSTANCE, O_EXTERNAL_DATA
2086 };
2087
2088 static const int modifier_opcodes[] = {
2089         O_LOG, O_ALTQ, O_TAG
2090 };
2091
2092 static const int src_opcodes[] = {
2093         O_IP_SRC, O_IP_SRC_LOOKUP, O_IP_SRC_MASK, O_IP_SRC_ME,
2094         O_IP_SRC_SET, O_IP6_SRC, O_IP6_SRC_MASK, O_IP6_SRC_ME
2095 };
2096
2097 static const int dst_opcodes[] = {
2098         O_IP_DST, O_IP_DST_LOOKUP, O_IP_DST_MASK, O_IP_DST_ME,
2099         O_IP_DST_SET, O_IP6_DST, O_IP6_DST_MASK, O_IP6_DST_ME
2100 };
2101
2102 static void
2103 show_static_rule(struct cmdline_opts *co, struct format_opts *fo,
2104     struct buf_pr *bp, struct ip_fw_rule *rule, struct ip_fw_bcounter *cntr)
2105 {
2106         struct show_state state;
2107         ipfw_insn *cmd;
2108         static int twidth = 0;
2109         int i;
2110
2111         /* Print # DISABLED or skip the rule */
2112         if ((fo->set_mask & (1 << rule->set)) == 0) {
2113                 /* disabled mask */
2114                 if (!co->show_sets)
2115                         return;
2116                 else
2117                         bprintf(bp, "# DISABLED ");
2118         }
2119         if (init_show_state(&state, rule) != 0) {
2120                 warn("init_show_state() failed");
2121                 return;
2122         }
2123         bprintf(bp, "%05u ", rule->rulenum);
2124
2125         /* Print counters if enabled */
2126         if (fo->pcwidth > 0 || fo->bcwidth > 0) {
2127                 pr_u64(bp, &cntr->pcnt, fo->pcwidth);
2128                 pr_u64(bp, &cntr->bcnt, fo->bcwidth);
2129         }
2130
2131         /* Print timestamp */
2132         if (co->do_time == TIMESTAMP_NUMERIC)
2133                 bprintf(bp, "%10u ", cntr->timestamp);
2134         else if (co->do_time == TIMESTAMP_STRING) {
2135                 char timestr[30];
2136                 time_t t = (time_t)0;
2137
2138                 if (twidth == 0) {
2139                         strcpy(timestr, ctime(&t));
2140                         *strchr(timestr, '\n') = '\0';
2141                         twidth = strlen(timestr);
2142                 }
2143                 if (cntr->timestamp > 0) {
2144                         t = _long_to_time(cntr->timestamp);
2145
2146                         strcpy(timestr, ctime(&t));
2147                         *strchr(timestr, '\n') = '\0';
2148                         bprintf(bp, "%s ", timestr);
2149                 } else {
2150                         bprintf(bp, "%*s", twidth, " ");
2151                 }
2152         }
2153
2154         /* Print set number */
2155         if (co->show_sets)
2156                 bprintf(bp, "set %d ", rule->set);
2157
2158         /* Print the optional "match probability" */
2159         cmd = print_opcode(bp, fo, &state, O_PROB);
2160         /* Print rule action */
2161         for (i = 0; i < nitems(action_opcodes); i++) {
2162                 cmd = print_action(bp, fo, &state, action_opcodes[i]);
2163                 if (cmd == NULL)
2164                         continue;
2165                 /* Handle special cases */
2166                 switch (cmd->opcode) {
2167                 case O_CHECK_STATE:
2168                         goto end;
2169                 case O_EXTERNAL_ACTION:
2170                 case O_EXTERNAL_INSTANCE:
2171                         /* External action can have several instructions */
2172                         continue;
2173                 }
2174                 break;
2175         }
2176         /* Print rule modifiers */
2177         for (i = 0; i < nitems(modifier_opcodes); i++)
2178                 print_action(bp, fo, &state, modifier_opcodes[i]);
2179         /*
2180          * Print rule body
2181          */
2182         if (co->comment_only != 0)
2183                 goto end;
2184         print_proto(bp, fo, &state);
2185
2186         /* Print source */
2187         bprintf(bp, " from");
2188         print_address(bp, fo, &state, src_opcodes, nitems(src_opcodes),
2189             O_IP_SRCPORT, HAVE_SRCIP);
2190
2191         /* Print destination */
2192         bprintf(bp, " to");
2193         print_address(bp, fo, &state, dst_opcodes, nitems(dst_opcodes),
2194             O_IP_DSTPORT, HAVE_DSTIP);
2195
2196         /* Print the rest of options */
2197         while (print_opcode(bp, fo, &state, 0))
2198                 ;
2199 end:
2200         /* Print comment at the end */
2201         cmd = print_opcode(bp, fo, &state, O_NOP);
2202         if (co->comment_only != 0 && cmd == NULL)
2203                 bprintf(bp, " // ...");
2204         bprintf(bp, "\n");
2205         free_show_state(&state);
2206 }
2207
2208 static void
2209 show_dyn_state(struct cmdline_opts *co, struct format_opts *fo,
2210     struct buf_pr *bp, ipfw_dyn_rule *d)
2211 {
2212         struct protoent *pe;
2213         struct in_addr a;
2214         uint16_t rulenum;
2215         char buf[INET6_ADDRSTRLEN];
2216
2217         if (!co->do_expired) {
2218                 if (!d->expire && !(d->dyn_type == O_LIMIT_PARENT))
2219                         return;
2220         }
2221         bcopy(&d->rule, &rulenum, sizeof(rulenum));
2222         bprintf(bp, "%05d", rulenum);
2223         if (fo->pcwidth > 0 || fo->bcwidth > 0) {
2224                 bprintf(bp, " ");
2225                 pr_u64(bp, &d->pcnt, fo->pcwidth);
2226                 pr_u64(bp, &d->bcnt, fo->bcwidth);
2227                 bprintf(bp, "(%ds)", d->expire);
2228         }
2229         switch (d->dyn_type) {
2230         case O_LIMIT_PARENT:
2231                 bprintf(bp, " PARENT %d", d->count);
2232                 break;
2233         case O_LIMIT:
2234                 bprintf(bp, " LIMIT");
2235                 break;
2236         case O_KEEP_STATE: /* bidir, no mask */
2237                 bprintf(bp, " STATE");
2238                 break;
2239         }
2240
2241         if ((pe = getprotobynumber(d->id.proto)) != NULL)
2242                 bprintf(bp, " %s", pe->p_name);
2243         else
2244                 bprintf(bp, " proto %u", d->id.proto);
2245
2246         if (d->id.addr_type == 4) {
2247                 a.s_addr = htonl(d->id.src_ip);
2248                 bprintf(bp, " %s %d", inet_ntoa(a), d->id.src_port);
2249
2250                 a.s_addr = htonl(d->id.dst_ip);
2251                 bprintf(bp, " <-> %s %d", inet_ntoa(a), d->id.dst_port);
2252         } else if (d->id.addr_type == 6) {
2253                 bprintf(bp, " %s %d", inet_ntop(AF_INET6, &d->id.src_ip6, buf,
2254                     sizeof(buf)), d->id.src_port);
2255                 bprintf(bp, " <-> %s %d", inet_ntop(AF_INET6, &d->id.dst_ip6,
2256                     buf, sizeof(buf)), d->id.dst_port);
2257         } else
2258                 bprintf(bp, " UNKNOWN <-> UNKNOWN");
2259         if (d->kidx != 0)
2260                 bprintf(bp, " :%s", object_search_ctlv(fo->tstate,
2261                     d->kidx, IPFW_TLV_STATE_NAME));
2262 }
2263
2264 static int
2265 do_range_cmd(int cmd, ipfw_range_tlv *rt)
2266 {
2267         ipfw_range_header rh;
2268         size_t sz;
2269
2270         memset(&rh, 0, sizeof(rh));
2271         memcpy(&rh.range, rt, sizeof(*rt));
2272         rh.range.head.length = sizeof(*rt);
2273         rh.range.head.type = IPFW_TLV_RANGE;
2274         sz = sizeof(rh);
2275
2276         if (do_get3(cmd, &rh.opheader, &sz) != 0)
2277                 return (-1);
2278         /* Save number of matched objects */
2279         rt->new_set = rh.range.new_set;
2280         return (0);
2281 }
2282
2283 /*
2284  * This one handles all set-related commands
2285  *      ipfw set { show | enable | disable }
2286  *      ipfw set swap X Y
2287  *      ipfw set move X to Y
2288  *      ipfw set move rule X to Y
2289  */
2290 void
2291 ipfw_sets_handler(char *av[])
2292 {
2293         ipfw_range_tlv rt;
2294         char *msg;
2295         size_t size;
2296         uint32_t masks[2];
2297         int i;
2298         uint16_t rulenum;
2299         uint8_t cmd;
2300
2301         av++;
2302         memset(&rt, 0, sizeof(rt));
2303
2304         if (av[0] == NULL)
2305                 errx(EX_USAGE, "set needs command");
2306         if (_substrcmp(*av, "show") == 0) {
2307                 struct format_opts fo;
2308                 ipfw_cfg_lheader *cfg;
2309
2310                 memset(&fo, 0, sizeof(fo));
2311                 if (ipfw_get_config(&co, &fo, &cfg, &size) != 0)
2312                         err(EX_OSERR, "requesting config failed");
2313
2314                 for (i = 0, msg = "disable"; i < RESVD_SET; i++)
2315                         if ((cfg->set_mask & (1<<i)) == 0) {
2316                                 printf("%s %d", msg, i);
2317                                 msg = "";
2318                         }
2319                 msg = (cfg->set_mask != (uint32_t)-1) ? " enable" : "enable";
2320                 for (i = 0; i < RESVD_SET; i++)
2321                         if ((cfg->set_mask & (1<<i)) != 0) {
2322                                 printf("%s %d", msg, i);
2323                                 msg = "";
2324                         }
2325                 printf("\n");
2326                 free(cfg);
2327         } else if (_substrcmp(*av, "swap") == 0) {
2328                 av++;
2329                 if ( av[0] == NULL || av[1] == NULL )
2330                         errx(EX_USAGE, "set swap needs 2 set numbers\n");
2331                 rt.set = atoi(av[0]);
2332                 rt.new_set = atoi(av[1]);
2333                 if (!isdigit(*(av[0])) || rt.set > RESVD_SET)
2334                         errx(EX_DATAERR, "invalid set number %s\n", av[0]);
2335                 if (!isdigit(*(av[1])) || rt.new_set > RESVD_SET)
2336                         errx(EX_DATAERR, "invalid set number %s\n", av[1]);
2337                 i = do_range_cmd(IP_FW_SET_SWAP, &rt);
2338         } else if (_substrcmp(*av, "move") == 0) {
2339                 av++;
2340                 if (av[0] && _substrcmp(*av, "rule") == 0) {
2341                         rt.flags = IPFW_RCFLAG_RANGE; /* move rules to new set */
2342                         cmd = IP_FW_XMOVE;
2343                         av++;
2344                 } else
2345                         cmd = IP_FW_SET_MOVE; /* Move set to new one */
2346                 if (av[0] == NULL || av[1] == NULL || av[2] == NULL ||
2347                                 av[3] != NULL ||  _substrcmp(av[1], "to") != 0)
2348                         errx(EX_USAGE, "syntax: set move [rule] X to Y\n");
2349                 rulenum = atoi(av[0]);
2350                 rt.new_set = atoi(av[2]);
2351                 if (cmd == IP_FW_XMOVE) {
2352                         rt.start_rule = rulenum;
2353                         rt.end_rule = rulenum;
2354                 } else
2355                         rt.set = rulenum;
2356                 rt.new_set = atoi(av[2]);
2357                 if (!isdigit(*(av[0])) || (cmd == 3 && rt.set > RESVD_SET) ||
2358                         (cmd == 2 && rt.start_rule == IPFW_DEFAULT_RULE) )
2359                         errx(EX_DATAERR, "invalid source number %s\n", av[0]);
2360                 if (!isdigit(*(av[2])) || rt.new_set > RESVD_SET)
2361                         errx(EX_DATAERR, "invalid dest. set %s\n", av[1]);
2362                 i = do_range_cmd(cmd, &rt);
2363                 if (i < 0)
2364                         err(EX_OSERR, "failed to move %s",
2365                             cmd == IP_FW_SET_MOVE ? "set": "rule");
2366         } else if (_substrcmp(*av, "disable") == 0 ||
2367                    _substrcmp(*av, "enable") == 0 ) {
2368                 int which = _substrcmp(*av, "enable") == 0 ? 1 : 0;
2369
2370                 av++;
2371                 masks[0] = masks[1] = 0;
2372
2373                 while (av[0]) {
2374                         if (isdigit(**av)) {
2375                                 i = atoi(*av);
2376                                 if (i < 0 || i > RESVD_SET)
2377                                         errx(EX_DATAERR,
2378                                             "invalid set number %d\n", i);
2379                                 masks[which] |= (1<<i);
2380                         } else if (_substrcmp(*av, "disable") == 0)
2381                                 which = 0;
2382                         else if (_substrcmp(*av, "enable") == 0)
2383                                 which = 1;
2384                         else
2385                                 errx(EX_DATAERR,
2386                                         "invalid set command %s\n", *av);
2387                         av++;
2388                 }
2389                 if ( (masks[0] & masks[1]) != 0 )
2390                         errx(EX_DATAERR,
2391                             "cannot enable and disable the same set\n");
2392
2393                 rt.set = masks[0];
2394                 rt.new_set = masks[1];
2395                 i = do_range_cmd(IP_FW_SET_ENABLE, &rt);
2396                 if (i)
2397                         warn("set enable/disable: setsockopt(IP_FW_SET_ENABLE)");
2398         } else
2399                 errx(EX_USAGE, "invalid set command %s\n", *av);
2400 }
2401
2402 void
2403 ipfw_sysctl_handler(char *av[], int which)
2404 {
2405         av++;
2406
2407         if (av[0] == NULL) {
2408                 warnx("missing keyword to enable/disable\n");
2409         } else if (_substrcmp(*av, "firewall") == 0) {
2410                 sysctlbyname("net.inet.ip.fw.enable", NULL, 0,
2411                     &which, sizeof(which));
2412                 sysctlbyname("net.inet6.ip6.fw.enable", NULL, 0,
2413                     &which, sizeof(which));
2414         } else if (_substrcmp(*av, "one_pass") == 0) {
2415                 sysctlbyname("net.inet.ip.fw.one_pass", NULL, 0,
2416                     &which, sizeof(which));
2417         } else if (_substrcmp(*av, "debug") == 0) {
2418                 sysctlbyname("net.inet.ip.fw.debug", NULL, 0,
2419                     &which, sizeof(which));
2420         } else if (_substrcmp(*av, "verbose") == 0) {
2421                 sysctlbyname("net.inet.ip.fw.verbose", NULL, 0,
2422                     &which, sizeof(which));
2423         } else if (_substrcmp(*av, "dyn_keepalive") == 0) {
2424                 sysctlbyname("net.inet.ip.fw.dyn_keepalive", NULL, 0,
2425                     &which, sizeof(which));
2426 #ifndef NO_ALTQ
2427         } else if (_substrcmp(*av, "altq") == 0) {
2428                 altq_set_enabled(which);
2429 #endif
2430         } else {
2431                 warnx("unrecognize enable/disable keyword: %s\n", *av);
2432         }
2433 }
2434
2435 typedef void state_cb(struct cmdline_opts *co, struct format_opts *fo,
2436     void *arg, void *state);
2437
2438 static void
2439 prepare_format_dyn(struct cmdline_opts *co, struct format_opts *fo,
2440     void *arg, void *_state)
2441 {
2442         ipfw_dyn_rule *d;
2443         int width;
2444         uint8_t set;
2445
2446         d = (ipfw_dyn_rule *)_state;
2447         /* Count _ALL_ states */
2448         fo->dcnt++;
2449
2450         if (fo->show_counters == 0)
2451                 return;
2452
2453         if (co->use_set) {
2454                 /* skip states from another set */
2455                 bcopy((char *)&d->rule + sizeof(uint16_t), &set,
2456                     sizeof(uint8_t));
2457                 if (set != co->use_set - 1)
2458                         return;
2459         }
2460
2461         width = pr_u64(NULL, &d->pcnt, 0);
2462         if (width > fo->pcwidth)
2463                 fo->pcwidth = width;
2464
2465         width = pr_u64(NULL, &d->bcnt, 0);
2466         if (width > fo->bcwidth)
2467                 fo->bcwidth = width;
2468 }
2469
2470 static int
2471 foreach_state(struct cmdline_opts *co, struct format_opts *fo,
2472     caddr_t base, size_t sz, state_cb dyn_bc, void *dyn_arg)
2473 {
2474         int ttype;
2475         state_cb *fptr;
2476         void *farg;
2477         ipfw_obj_tlv *tlv;
2478         ipfw_obj_ctlv *ctlv;
2479
2480         fptr = NULL;
2481         ttype = 0;
2482
2483         while (sz > 0) {
2484                 ctlv = (ipfw_obj_ctlv *)base;
2485                 switch (ctlv->head.type) {
2486                 case IPFW_TLV_DYNSTATE_LIST:
2487                         base += sizeof(*ctlv);
2488                         sz -= sizeof(*ctlv);
2489                         ttype = IPFW_TLV_DYN_ENT;
2490                         fptr = dyn_bc;
2491                         farg = dyn_arg;
2492                         break;
2493                 default:
2494                         return (sz);
2495                 }
2496
2497                 while (sz > 0) {
2498                         tlv = (ipfw_obj_tlv *)base;
2499                         if (tlv->type != ttype)
2500                                 break;
2501
2502                         fptr(co, fo, farg, tlv + 1);
2503                         sz -= tlv->length;
2504                         base += tlv->length;
2505                 }
2506         }
2507
2508         return (sz);
2509 }
2510
2511 static void
2512 prepare_format_opts(struct cmdline_opts *co, struct format_opts *fo,
2513     ipfw_obj_tlv *rtlv, int rcnt, caddr_t dynbase, size_t dynsz)
2514 {
2515         int bcwidth, pcwidth, width;
2516         int n;
2517         struct ip_fw_bcounter *cntr;
2518         struct ip_fw_rule *r;
2519
2520         bcwidth = 0;
2521         pcwidth = 0;
2522         if (fo->show_counters != 0) {
2523                 for (n = 0; n < rcnt; n++,
2524                     rtlv = (ipfw_obj_tlv *)((caddr_t)rtlv + rtlv->length)) {
2525                         cntr = (struct ip_fw_bcounter *)(rtlv + 1);
2526                         r = (struct ip_fw_rule *)((caddr_t)cntr + cntr->size);
2527                         /* skip rules from another set */
2528                         if (co->use_set && r->set != co->use_set - 1)
2529                                 continue;
2530
2531                         /* packet counter */
2532                         width = pr_u64(NULL, &cntr->pcnt, 0);
2533                         if (width > pcwidth)
2534                                 pcwidth = width;
2535
2536                         /* byte counter */
2537                         width = pr_u64(NULL, &cntr->bcnt, 0);
2538                         if (width > bcwidth)
2539                                 bcwidth = width;
2540                 }
2541         }
2542         fo->bcwidth = bcwidth;
2543         fo->pcwidth = pcwidth;
2544
2545         fo->dcnt = 0;
2546         if (co->do_dynamic && dynsz > 0)
2547                 foreach_state(co, fo, dynbase, dynsz, prepare_format_dyn, NULL);
2548 }
2549
2550 static int
2551 list_static_range(struct cmdline_opts *co, struct format_opts *fo,
2552     struct buf_pr *bp, ipfw_obj_tlv *rtlv, int rcnt)
2553 {
2554         int n, seen;
2555         struct ip_fw_rule *r;
2556         struct ip_fw_bcounter *cntr;
2557         int c = 0;
2558
2559         for (n = seen = 0; n < rcnt; n++,
2560             rtlv = (ipfw_obj_tlv *)((caddr_t)rtlv + rtlv->length)) {
2561
2562                 if ((fo->show_counters | fo->show_time) != 0) {
2563                         cntr = (struct ip_fw_bcounter *)(rtlv + 1);
2564                         r = (struct ip_fw_rule *)((caddr_t)cntr + cntr->size);
2565                 } else {
2566                         cntr = NULL;
2567                         r = (struct ip_fw_rule *)(rtlv + 1);
2568                 }
2569                 if (r->rulenum > fo->last)
2570                         break;
2571                 if (co->use_set && r->set != co->use_set - 1)
2572                         continue;
2573                 if (r->rulenum >= fo->first && r->rulenum <= fo->last) {
2574                         show_static_rule(co, fo, bp, r, cntr);
2575                         printf("%s", bp->buf);
2576                         c += rtlv->length;
2577                         bp_flush(bp);
2578                         seen++;
2579                 }
2580         }
2581
2582         return (seen);
2583 }
2584
2585 static void
2586 list_dyn_state(struct cmdline_opts *co, struct format_opts *fo,
2587     void *_arg, void *_state)
2588 {
2589         uint16_t rulenum;
2590         uint8_t set;
2591         ipfw_dyn_rule *d;
2592         struct buf_pr *bp;
2593
2594         d = (ipfw_dyn_rule *)_state;
2595         bp = (struct buf_pr *)_arg;
2596
2597         bcopy(&d->rule, &rulenum, sizeof(rulenum));
2598         if (rulenum > fo->last)
2599                 return;
2600         if (co->use_set) {
2601                 bcopy((char *)&d->rule + sizeof(uint16_t),
2602                       &set, sizeof(uint8_t));
2603                 if (set != co->use_set - 1)
2604                         return;
2605         }
2606         if (rulenum >= fo->first) {
2607                 show_dyn_state(co, fo, bp, d);
2608                 printf("%s\n", bp->buf);
2609                 bp_flush(bp);
2610         }
2611 }
2612
2613 static int
2614 list_dyn_range(struct cmdline_opts *co, struct format_opts *fo,
2615     struct buf_pr *bp, caddr_t base, size_t sz)
2616 {
2617
2618         sz = foreach_state(co, fo, base, sz, list_dyn_state, bp);
2619         return (sz);
2620 }
2621
2622 void
2623 ipfw_list(int ac, char *av[], int show_counters)
2624 {
2625         ipfw_cfg_lheader *cfg;
2626         struct format_opts sfo;
2627         size_t sz;
2628         int error;
2629         int lac;
2630         char **lav;
2631         uint32_t rnum;
2632         char *endptr;
2633
2634         if (co.test_only) {
2635                 fprintf(stderr, "Testing only, list disabled\n");
2636                 return;
2637         }
2638         if (co.do_pipe) {
2639                 dummynet_list(ac, av, show_counters);
2640                 return;
2641         }
2642
2643         ac--;
2644         av++;
2645         memset(&sfo, 0, sizeof(sfo));
2646
2647         /* Determine rule range to request */
2648         if (ac > 0) {
2649                 for (lac = ac, lav = av; lac != 0; lac--) {
2650                         rnum = strtoul(*lav++, &endptr, 10);
2651                         if (sfo.first == 0 || rnum < sfo.first)
2652                                 sfo.first = rnum;
2653
2654                         if (*endptr == '-')
2655                                 rnum = strtoul(endptr + 1, &endptr, 10);
2656                         if (sfo.last == 0 || rnum > sfo.last)
2657                                 sfo.last = rnum;
2658                 }
2659         }
2660
2661         /* get configuraion from kernel */
2662         cfg = NULL;
2663         sfo.show_counters = show_counters;
2664         sfo.show_time = co.do_time;
2665         sfo.flags = IPFW_CFG_GET_STATIC;
2666         if (co.do_dynamic != 0)
2667                 sfo.flags |= IPFW_CFG_GET_STATES;
2668         if ((sfo.show_counters | sfo.show_time) != 0)
2669                 sfo.flags |= IPFW_CFG_GET_COUNTERS;
2670         if (ipfw_get_config(&co, &sfo, &cfg, &sz) != 0)
2671                 err(EX_OSERR, "retrieving config failed");
2672
2673         error = ipfw_show_config(&co, &sfo, cfg, sz, ac, av);
2674
2675         free(cfg);
2676
2677         if (error != EX_OK)
2678                 exit(error);
2679 }
2680
2681 static int
2682 ipfw_show_config(struct cmdline_opts *co, struct format_opts *fo,
2683     ipfw_cfg_lheader *cfg, size_t sz, int ac, char *av[])
2684 {
2685         caddr_t dynbase;
2686         size_t dynsz;
2687         int rcnt;
2688         int exitval = EX_OK;
2689         int lac;
2690         char **lav;
2691         char *endptr;
2692         size_t readsz;
2693         struct buf_pr bp;
2694         ipfw_obj_ctlv *ctlv, *tstate;
2695         ipfw_obj_tlv *rbase;
2696
2697         /*
2698          * Handle tablenames TLV first, if any
2699          */
2700         tstate = NULL;
2701         rbase = NULL;
2702         dynbase = NULL;
2703         dynsz = 0;
2704         readsz = sizeof(*cfg);
2705         rcnt = 0;
2706
2707         fo->set_mask = cfg->set_mask;
2708
2709         ctlv = (ipfw_obj_ctlv *)(cfg + 1);
2710
2711         if (cfg->flags & IPFW_CFG_GET_STATIC) {
2712                 /* We've requested static rules */
2713                 if (ctlv->head.type == IPFW_TLV_TBLNAME_LIST) {
2714                         object_sort_ctlv(ctlv);
2715                         fo->tstate = ctlv;
2716                         readsz += ctlv->head.length;
2717                         ctlv = (ipfw_obj_ctlv *)((caddr_t)ctlv +
2718                             ctlv->head.length);
2719                 }
2720
2721                 if (ctlv->head.type == IPFW_TLV_RULE_LIST) {
2722                         rbase = (ipfw_obj_tlv *)(ctlv + 1);
2723                         rcnt = ctlv->count;
2724                         readsz += ctlv->head.length;
2725                         ctlv = (ipfw_obj_ctlv *)((caddr_t)ctlv +
2726                             ctlv->head.length);
2727                 }
2728         }
2729
2730         if ((cfg->flags & IPFW_CFG_GET_STATES) && (readsz != sz))  {
2731                 /* We may have some dynamic states */
2732                 dynsz = sz - readsz;
2733                 /* Skip empty header */
2734                 if (dynsz != sizeof(ipfw_obj_ctlv))
2735                         dynbase = (caddr_t)ctlv;
2736                 else
2737                         dynsz = 0;
2738         }
2739
2740         prepare_format_opts(co, fo, rbase, rcnt, dynbase, dynsz);
2741         bp_alloc(&bp, 4096);
2742
2743         /* if no rule numbers were specified, list all rules */
2744         if (ac == 0) {
2745                 fo->first = 0;
2746                 fo->last = IPFW_DEFAULT_RULE;
2747                 list_static_range(co, fo, &bp, rbase, rcnt);
2748
2749                 if (co->do_dynamic && dynsz > 0) {
2750                         printf("## Dynamic rules (%d %zu):\n", fo->dcnt, dynsz);
2751                         list_dyn_range(co, fo, &bp, dynbase, dynsz);
2752                 }
2753
2754                 bp_free(&bp);
2755                 return (EX_OK);
2756         }
2757
2758         /* display specific rules requested on command line */
2759         for (lac = ac, lav = av; lac != 0; lac--) {
2760                 /* convert command line rule # */
2761                 fo->last = fo->first = strtoul(*lav++, &endptr, 10);
2762                 if (*endptr == '-')
2763                         fo->last = strtoul(endptr + 1, &endptr, 10);
2764                 if (*endptr) {
2765                         exitval = EX_USAGE;
2766                         warnx("invalid rule number: %s", *(lav - 1));
2767                         continue;
2768                 }
2769
2770                 if (list_static_range(co, fo, &bp, rbase, rcnt) == 0) {
2771                         /* give precedence to other error(s) */
2772                         if (exitval == EX_OK)
2773                                 exitval = EX_UNAVAILABLE;
2774                         if (fo->first == fo->last)
2775                                 warnx("rule %u does not exist", fo->first);
2776                         else
2777                                 warnx("no rules in range %u-%u",
2778                                     fo->first, fo->last);
2779                 }
2780         }
2781
2782         if (co->do_dynamic && dynsz > 0) {
2783                 printf("## Dynamic rules:\n");
2784                 for (lac = ac, lav = av; lac != 0; lac--) {
2785                         fo->last = fo->first = strtoul(*lav++, &endptr, 10);
2786                         if (*endptr == '-')
2787                                 fo->last = strtoul(endptr+1, &endptr, 10);
2788                         if (*endptr)
2789                                 /* already warned */
2790                                 continue;
2791                         list_dyn_range(co, fo, &bp, dynbase, dynsz);
2792                 }
2793         }
2794
2795         bp_free(&bp);
2796         return (exitval);
2797 }
2798
2799
2800 /*
2801  * Retrieves current ipfw configuration of given type
2802  * and stores its pointer to @pcfg.
2803  *
2804  * Caller is responsible for freeing @pcfg.
2805  *
2806  * Returns 0 on success.
2807  */
2808
2809 static int
2810 ipfw_get_config(struct cmdline_opts *co, struct format_opts *fo,
2811     ipfw_cfg_lheader **pcfg, size_t *psize)
2812 {
2813         ipfw_cfg_lheader *cfg;
2814         size_t sz;
2815         int i;
2816
2817
2818         if (co->test_only != 0) {
2819                 fprintf(stderr, "Testing only, list disabled\n");
2820                 return (0);
2821         }
2822
2823         /* Start with some data size */
2824         sz = 4096;
2825         cfg = NULL;
2826
2827         for (i = 0; i < 16; i++) {
2828                 if (cfg != NULL)
2829                         free(cfg);
2830                 if ((cfg = calloc(1, sz)) == NULL)
2831                         return (ENOMEM);
2832
2833                 cfg->flags = fo->flags;
2834                 cfg->start_rule = fo->first;
2835                 cfg->end_rule = fo->last;
2836
2837                 if (do_get3(IP_FW_XGET, &cfg->opheader, &sz) != 0) {
2838                         if (errno != ENOMEM) {
2839                                 free(cfg);
2840                                 return (errno);
2841                         }
2842
2843                         /* Buffer size is not enough. Try to increase */
2844                         sz = sz * 2;
2845                         if (sz < cfg->size)
2846                                 sz = cfg->size;
2847                         continue;
2848                 }
2849
2850                 *pcfg = cfg;
2851                 *psize = sz;
2852                 return (0);
2853         }
2854
2855         free(cfg);
2856         return (ENOMEM);
2857 }
2858
2859 static int
2860 lookup_host (char *host, struct in_addr *ipaddr)
2861 {
2862         struct hostent *he;
2863
2864         if (!inet_aton(host, ipaddr)) {
2865                 if ((he = gethostbyname(host)) == NULL)
2866                         return(-1);
2867                 *ipaddr = *(struct in_addr *)he->h_addr_list[0];
2868         }
2869         return(0);
2870 }
2871
2872 struct tidx {
2873         ipfw_obj_ntlv *idx;
2874         uint32_t count;
2875         uint32_t size;
2876         uint16_t counter;
2877         uint8_t set;
2878 };
2879
2880 int
2881 ipfw_check_object_name(const char *name)
2882 {
2883         int c, i, l;
2884
2885         /*
2886          * Check that name is null-terminated and contains
2887          * valid symbols only. Valid mask is:
2888          * [a-zA-Z0-9\-_\.]{1,63}
2889          */
2890         l = strlen(name);
2891         if (l == 0 || l >= 64)
2892                 return (EINVAL);
2893         for (i = 0; i < l; i++) {
2894                 c = name[i];
2895                 if (isalpha(c) || isdigit(c) || c == '_' ||
2896                     c == '-' || c == '.')
2897                         continue;
2898                 return (EINVAL);
2899         }
2900         return (0);
2901 }
2902
2903 static char *default_state_name = "default";
2904 static int
2905 state_check_name(const char *name)
2906 {
2907
2908         if (ipfw_check_object_name(name) != 0)
2909                 return (EINVAL);
2910         if (strcmp(name, "any") == 0)
2911                 return (EINVAL);
2912         return (0);
2913 }
2914
2915 static int
2916 eaction_check_name(const char *name)
2917 {
2918
2919         if (ipfw_check_object_name(name) != 0)
2920                 return (EINVAL);
2921         /* Restrict some 'special' names */
2922         if (match_token(rule_actions, name) != -1 &&
2923             match_token(rule_action_params, name) != -1)
2924                 return (EINVAL);
2925         return (0);
2926 }
2927
2928 static uint16_t
2929 pack_object(struct tidx *tstate, char *name, int otype)
2930 {
2931         int i;
2932         ipfw_obj_ntlv *ntlv;
2933
2934         for (i = 0; i < tstate->count; i++) {
2935                 if (strcmp(tstate->idx[i].name, name) != 0)
2936                         continue;
2937                 if (tstate->idx[i].set != tstate->set)
2938                         continue;
2939                 if (tstate->idx[i].head.type != otype)
2940                         continue;
2941
2942                 return (tstate->idx[i].idx);
2943         }
2944
2945         if (tstate->count + 1 > tstate->size) {
2946                 tstate->size += 4;
2947                 tstate->idx = realloc(tstate->idx, tstate->size *
2948                     sizeof(ipfw_obj_ntlv));
2949                 if (tstate->idx == NULL)
2950                         return (0);
2951         }
2952
2953         ntlv = &tstate->idx[i];
2954         memset(ntlv, 0, sizeof(ipfw_obj_ntlv));
2955         strlcpy(ntlv->name, name, sizeof(ntlv->name));
2956         ntlv->head.type = otype;
2957         ntlv->head.length = sizeof(ipfw_obj_ntlv);
2958         ntlv->set = tstate->set;
2959         ntlv->idx = ++tstate->counter;
2960         tstate->count++;
2961
2962         return (ntlv->idx);
2963 }
2964
2965 static uint16_t
2966 pack_table(struct tidx *tstate, char *name)
2967 {
2968
2969         if (table_check_name(name) != 0)
2970                 return (0);
2971
2972         return (pack_object(tstate, name, IPFW_TLV_TBL_NAME));
2973 }
2974
2975 void
2976 fill_table(struct _ipfw_insn *cmd, char *av, uint8_t opcode,
2977     struct tidx *tstate)
2978 {
2979         uint32_t *d = ((ipfw_insn_u32 *)cmd)->d;
2980         uint16_t uidx;
2981         char *p;
2982
2983         if ((p = strchr(av + 6, ')')) == NULL)
2984                 errx(EX_DATAERR, "forgotten parenthesis: '%s'", av);
2985         *p = '\0';
2986         p = strchr(av + 6, ',');
2987         if (p)
2988                 *p++ = '\0';
2989
2990         if ((uidx = pack_table(tstate, av + 6)) == 0)
2991                 errx(EX_DATAERR, "Invalid table name: %s", av + 6);
2992
2993         cmd->opcode = opcode;
2994         cmd->arg1 = uidx;
2995         if (p) {
2996                 cmd->len |= F_INSN_SIZE(ipfw_insn_u32);
2997                 d[0] = strtoul(p, NULL, 0);
2998         } else
2999                 cmd->len |= F_INSN_SIZE(ipfw_insn);
3000 }
3001
3002
3003 /*
3004  * fills the addr and mask fields in the instruction as appropriate from av.
3005  * Update length as appropriate.
3006  * The following formats are allowed:
3007  *      me      returns O_IP_*_ME
3008  *      1.2.3.4         single IP address
3009  *      1.2.3.4:5.6.7.8 address:mask
3010  *      1.2.3.4/24      address/mask
3011  *      1.2.3.4/26{1,6,5,4,23}  set of addresses in a subnet
3012  * We can have multiple comma-separated address/mask entries.
3013  */
3014 static void
3015 fill_ip(ipfw_insn_ip *cmd, char *av, int cblen, struct tidx *tstate)
3016 {
3017         int len = 0;
3018         uint32_t *d = ((ipfw_insn_u32 *)cmd)->d;
3019
3020         cmd->o.len &= ~F_LEN_MASK;      /* zero len */
3021
3022         if (_substrcmp(av, "any") == 0)
3023                 return;
3024
3025         if (_substrcmp(av, "me") == 0) {
3026                 cmd->o.len |= F_INSN_SIZE(ipfw_insn);
3027                 return;
3028         }
3029
3030         if (strncmp(av, "table(", 6) == 0) {
3031                 fill_table(&cmd->o, av, O_IP_DST_LOOKUP, tstate);
3032                 return;
3033         }
3034
3035     while (av) {
3036         /*
3037          * After the address we can have '/' or ':' indicating a mask,
3038          * ',' indicating another address follows, '{' indicating a
3039          * set of addresses of unspecified size.
3040          */
3041         char *t = NULL, *p = strpbrk(av, "/:,{");
3042         int masklen;
3043         char md, nd = '\0';
3044
3045         CHECK_LENGTH(cblen, F_INSN_SIZE(ipfw_insn) + 2 + len);
3046
3047         if (p) {
3048                 md = *p;
3049                 *p++ = '\0';
3050                 if ((t = strpbrk(p, ",{")) != NULL) {
3051                         nd = *t;
3052                         *t = '\0';
3053                 }
3054         } else
3055                 md = '\0';
3056
3057         if (lookup_host(av, (struct in_addr *)&d[0]) != 0)
3058                 errx(EX_NOHOST, "hostname ``%s'' unknown", av);
3059         switch (md) {
3060         case ':':
3061                 if (!inet_aton(p, (struct in_addr *)&d[1]))
3062                         errx(EX_DATAERR, "bad netmask ``%s''", p);
3063                 break;
3064         case '/':
3065                 masklen = atoi(p);
3066                 if (masklen == 0)
3067                         d[1] = htonl(0U);       /* mask */
3068                 else if (masklen > 32)
3069                         errx(EX_DATAERR, "bad width ``%s''", p);
3070                 else
3071                         d[1] = htonl(~0U << (32 - masklen));
3072                 break;
3073         case '{':       /* no mask, assume /24 and put back the '{' */
3074                 d[1] = htonl(~0U << (32 - 24));
3075                 *(--p) = md;
3076                 break;
3077
3078         case ',':       /* single address plus continuation */
3079                 *(--p) = md;
3080                 /* FALLTHROUGH */
3081         case 0:         /* initialization value */
3082         default:
3083                 d[1] = htonl(~0U);      /* force /32 */
3084                 break;
3085         }
3086         d[0] &= d[1];           /* mask base address with mask */
3087         if (t)
3088                 *t = nd;
3089         /* find next separator */
3090         if (p)
3091                 p = strpbrk(p, ",{");
3092         if (p && *p == '{') {
3093                 /*
3094                  * We have a set of addresses. They are stored as follows:
3095                  *   arg1       is the set size (powers of 2, 2..256)
3096                  *   addr       is the base address IN HOST FORMAT
3097                  *   mask..     is an array of arg1 bits (rounded up to
3098                  *              the next multiple of 32) with bits set
3099                  *              for each host in the map.
3100                  */
3101                 uint32_t *map = (uint32_t *)&cmd->mask;
3102                 int low, high;
3103                 int i = contigmask((uint8_t *)&(d[1]), 32);
3104
3105                 if (len > 0)
3106                         errx(EX_DATAERR, "address set cannot be in a list");
3107                 if (i < 24 || i > 31)
3108                         errx(EX_DATAERR, "invalid set with mask %d\n", i);
3109                 cmd->o.arg1 = 1<<(32-i);        /* map length           */
3110                 d[0] = ntohl(d[0]);             /* base addr in host format */
3111                 cmd->o.opcode = O_IP_DST_SET;   /* default */
3112                 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32) + (cmd->o.arg1+31)/32;
3113                 for (i = 0; i < (cmd->o.arg1+31)/32 ; i++)
3114                         map[i] = 0;     /* clear map */
3115
3116                 av = p + 1;
3117                 low = d[0] & 0xff;
3118                 high = low + cmd->o.arg1 - 1;
3119                 /*
3120                  * Here, i stores the previous value when we specify a range
3121                  * of addresses within a mask, e.g. 45-63. i = -1 means we
3122                  * have no previous value.
3123                  */
3124                 i = -1; /* previous value in a range */
3125                 while (isdigit(*av)) {
3126                         char *s;
3127                         int a = strtol(av, &s, 0);
3128
3129                         if (s == av) { /* no parameter */
3130                             if (*av != '}')
3131                                 errx(EX_DATAERR, "set not closed\n");
3132                             if (i != -1)
3133                                 errx(EX_DATAERR, "incomplete range %d-", i);
3134                             break;
3135                         }
3136                         if (a < low || a > high)
3137                             errx(EX_DATAERR, "addr %d out of range [%d-%d]\n",
3138                                 a, low, high);
3139                         a -= low;
3140                         if (i == -1)    /* no previous in range */
3141                             i = a;
3142                         else {          /* check that range is valid */
3143                             if (i > a)
3144                                 errx(EX_DATAERR, "invalid range %d-%d",
3145                                         i+low, a+low);
3146                             if (*s == '-')
3147                                 errx(EX_DATAERR, "double '-' in range");
3148                         }
3149                         for (; i <= a; i++)
3150                             map[i/32] |= 1<<(i & 31);
3151                         i = -1;
3152                         if (*s == '-')
3153                             i = a;
3154                         else if (*s == '}')
3155                             break;
3156                         av = s+1;
3157                 }
3158                 return;
3159         }
3160         av = p;
3161         if (av)                 /* then *av must be a ',' */
3162                 av++;
3163
3164         /* Check this entry */
3165         if (d[1] == 0) { /* "any", specified as x.x.x.x/0 */
3166                 /*
3167                  * 'any' turns the entire list into a NOP.
3168                  * 'not any' never matches, so it is removed from the
3169                  * list unless it is the only item, in which case we
3170                  * report an error.
3171                  */
3172                 if (cmd->o.len & F_NOT) {       /* "not any" never matches */
3173                         if (av == NULL && len == 0) /* only this entry */
3174                                 errx(EX_DATAERR, "not any never matches");
3175                 }
3176                 /* else do nothing and skip this entry */
3177                 return;
3178         }
3179         /* A single IP can be stored in an optimized format */
3180         if (d[1] == (uint32_t)~0 && av == NULL && len == 0) {
3181                 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32);
3182                 return;
3183         }
3184         len += 2;       /* two words... */
3185         d += 2;
3186     } /* end while */
3187     if (len + 1 > F_LEN_MASK)
3188         errx(EX_DATAERR, "address list too long");
3189     cmd->o.len |= len+1;
3190 }
3191
3192
3193 /* n2mask sets n bits of the mask */
3194 void
3195 n2mask(struct in6_addr *mask, int n)
3196 {
3197         static int      minimask[9] =
3198             { 0x00, 0x80, 0xc0, 0xe0, 0xf0, 0xf8, 0xfc, 0xfe, 0xff };
3199         u_char          *p;
3200
3201         memset(mask, 0, sizeof(struct in6_addr));
3202         p = (u_char *) mask;
3203         for (; n > 0; p++, n -= 8) {
3204                 if (n >= 8)
3205                         *p = 0xff;
3206                 else
3207                         *p = minimask[n];
3208         }
3209         return;
3210 }
3211
3212 static void
3213 fill_flags_cmd(ipfw_insn *cmd, enum ipfw_opcodes opcode,
3214         struct _s_x *flags, char *p)
3215 {
3216         char *e;
3217         uint32_t set = 0, clear = 0;
3218
3219         if (fill_flags(flags, p, &e, &set, &clear) != 0)
3220                 errx(EX_DATAERR, "invalid flag %s", e);
3221
3222         cmd->opcode = opcode;
3223         cmd->len =  (cmd->len & (F_NOT | F_OR)) | 1;
3224         cmd->arg1 = (set & 0xff) | ( (clear & 0xff) << 8);
3225 }
3226
3227
3228 void
3229 ipfw_delete(char *av[])
3230 {
3231         ipfw_range_tlv rt;
3232         char *sep;
3233         int i, j;
3234         int exitval = EX_OK;
3235         int do_set = 0;
3236
3237         av++;
3238         NEED1("missing rule specification");
3239         if ( *av && _substrcmp(*av, "set") == 0) {
3240                 /* Do not allow using the following syntax:
3241                  *      ipfw set N delete set M
3242                  */
3243                 if (co.use_set)
3244                         errx(EX_DATAERR, "invalid syntax");
3245                 do_set = 1;     /* delete set */
3246                 av++;
3247         }
3248
3249         /* Rule number */
3250         while (*av && isdigit(**av)) {
3251                 i = strtol(*av, &sep, 10);
3252                 j = i;
3253                 if (*sep== '-')
3254                         j = strtol(sep + 1, NULL, 10);
3255                 av++;
3256                 if (co.do_nat) {
3257                         exitval = do_cmd(IP_FW_NAT_DEL, &i, sizeof i);
3258                         if (exitval) {
3259                                 exitval = EX_UNAVAILABLE;
3260                                 warn("rule %u not available", i);
3261                         }
3262                 } else if (co.do_pipe) {
3263                         exitval = ipfw_delete_pipe(co.do_pipe, i);
3264                 } else {
3265                         memset(&rt, 0, sizeof(rt));
3266                         if (do_set != 0) {
3267                                 rt.set = i & 31;
3268                                 rt.flags = IPFW_RCFLAG_SET;
3269                         } else {
3270                                 rt.start_rule = i & 0xffff;
3271                                 rt.end_rule = j & 0xffff;
3272                                 if (rt.start_rule == 0 && rt.end_rule == 0)
3273                                         rt.flags |= IPFW_RCFLAG_ALL;
3274                                 else
3275                                         rt.flags |= IPFW_RCFLAG_RANGE;
3276                                 if (co.use_set != 0) {
3277                                         rt.set = co.use_set - 1;
3278                                         rt.flags |= IPFW_RCFLAG_SET;
3279                                 }
3280                         }
3281                         i = do_range_cmd(IP_FW_XDEL, &rt);
3282                         if (i != 0) {
3283                                 exitval = EX_UNAVAILABLE;
3284                                 warn("rule %u: setsockopt(IP_FW_XDEL)",
3285                                     rt.start_rule);
3286                         } else if (rt.new_set == 0 && do_set == 0) {
3287                                 exitval = EX_UNAVAILABLE;
3288                                 if (rt.start_rule != rt.end_rule)
3289                                         warnx("no rules rules in %u-%u range",
3290                                             rt.start_rule, rt.end_rule);
3291                                 else
3292                                         warnx("rule %u not found",
3293                                             rt.start_rule);
3294                         }
3295                 }
3296         }
3297         if (exitval != EX_OK)
3298                 exit(exitval);
3299 }
3300
3301
3302 /*
3303  * fill the interface structure. We do not check the name as we can
3304  * create interfaces dynamically, so checking them at insert time
3305  * makes relatively little sense.
3306  * Interface names containing '*', '?', or '[' are assumed to be shell
3307  * patterns which match interfaces.
3308  */
3309 static void
3310 fill_iface(ipfw_insn_if *cmd, char *arg, int cblen, struct tidx *tstate)
3311 {
3312         char *p;
3313         uint16_t uidx;
3314
3315         cmd->name[0] = '\0';
3316         cmd->o.len |= F_INSN_SIZE(ipfw_insn_if);
3317
3318         CHECK_CMDLEN;
3319
3320         /* Parse the interface or address */
3321         if (strcmp(arg, "any") == 0)
3322                 cmd->o.len = 0;         /* effectively ignore this command */
3323         else if (strncmp(arg, "table(", 6) == 0) {
3324                 if ((p = strchr(arg + 6, ')')) == NULL)
3325                         errx(EX_DATAERR, "forgotten parenthesis: '%s'", arg);
3326                 *p = '\0';
3327                 p = strchr(arg + 6, ',');
3328                 if (p)
3329                         *p++ = '\0';
3330                 if ((uidx = pack_table(tstate, arg + 6)) == 0)
3331                         errx(EX_DATAERR, "Invalid table name: %s", arg + 6);
3332
3333                 cmd->name[0] = '\1'; /* Special value indicating table */
3334                 cmd->p.kidx = uidx;
3335         } else if (!isdigit(*arg)) {
3336                 strlcpy(cmd->name, arg, sizeof(cmd->name));
3337                 cmd->p.glob = strpbrk(arg, "*?[") != NULL ? 1 : 0;
3338         } else if (!inet_aton(arg, &cmd->p.ip))
3339                 errx(EX_DATAERR, "bad ip address ``%s''", arg);
3340 }
3341
3342 static void
3343 get_mac_addr_mask(const char *p, uint8_t *addr, uint8_t *mask)
3344 {
3345         int i;
3346         size_t l;
3347         char *ap, *ptr, *optr;
3348         struct ether_addr *mac;
3349         const char *macset = "0123456789abcdefABCDEF:";
3350
3351         if (strcmp(p, "any") == 0) {
3352                 for (i = 0; i < ETHER_ADDR_LEN; i++)
3353                         addr[i] = mask[i] = 0;
3354                 return;
3355         }
3356
3357         optr = ptr = strdup(p);
3358         if ((ap = strsep(&ptr, "&/")) != NULL && *ap != 0) {
3359                 l = strlen(ap);
3360                 if (strspn(ap, macset) != l || (mac = ether_aton(ap)) == NULL)
3361                         errx(EX_DATAERR, "Incorrect MAC address");
3362                 bcopy(mac, addr, ETHER_ADDR_LEN);
3363         } else
3364                 errx(EX_DATAERR, "Incorrect MAC address");
3365
3366         if (ptr != NULL) { /* we have mask? */
3367                 if (p[ptr - optr - 1] == '/') { /* mask len */
3368                         long ml = strtol(ptr, &ap, 10);
3369                         if (*ap != 0 || ml > ETHER_ADDR_LEN * 8 || ml < 0)
3370                                 errx(EX_DATAERR, "Incorrect mask length");
3371                         for (i = 0; ml > 0 && i < ETHER_ADDR_LEN; ml -= 8, i++)
3372                                 mask[i] = (ml >= 8) ? 0xff: (~0) << (8 - ml);
3373                 } else { /* mask */
3374                         l = strlen(ptr);
3375                         if (strspn(ptr, macset) != l ||
3376                             (mac = ether_aton(ptr)) == NULL)
3377                                 errx(EX_DATAERR, "Incorrect mask");
3378                         bcopy(mac, mask, ETHER_ADDR_LEN);
3379                 }
3380         } else { /* default mask: ff:ff:ff:ff:ff:ff */
3381                 for (i = 0; i < ETHER_ADDR_LEN; i++)
3382                         mask[i] = 0xff;
3383         }
3384         for (i = 0; i < ETHER_ADDR_LEN; i++)
3385                 addr[i] &= mask[i];
3386
3387         free(optr);
3388 }
3389
3390 /*
3391  * helper function, updates the pointer to cmd with the length
3392  * of the current command, and also cleans up the first word of
3393  * the new command in case it has been clobbered before.
3394  */
3395 static ipfw_insn *
3396 next_cmd(ipfw_insn *cmd, int *len)
3397 {
3398         *len -= F_LEN(cmd);
3399         CHECK_LENGTH(*len, 0);
3400         cmd += F_LEN(cmd);
3401         bzero(cmd, sizeof(*cmd));
3402         return cmd;
3403 }
3404
3405 /*
3406  * Takes arguments and copies them into a comment
3407  */
3408 static void
3409 fill_comment(ipfw_insn *cmd, char **av, int cblen)
3410 {
3411         int i, l;
3412         char *p = (char *)(cmd + 1);
3413
3414         cmd->opcode = O_NOP;
3415         cmd->len =  (cmd->len & (F_NOT | F_OR));
3416
3417         /* Compute length of comment string. */
3418         for (i = 0, l = 0; av[i] != NULL; i++)
3419                 l += strlen(av[i]) + 1;
3420         if (l == 0)
3421                 return;
3422         if (l > 84)
3423                 errx(EX_DATAERR,
3424                     "comment too long (max 80 chars)");
3425         l = 1 + (l+3)/4;
3426         cmd->len =  (cmd->len & (F_NOT | F_OR)) | l;
3427         CHECK_CMDLEN;
3428
3429         for (i = 0; av[i] != NULL; i++) {
3430                 strcpy(p, av[i]);
3431                 p += strlen(av[i]);
3432                 *p++ = ' ';
3433         }
3434         *(--p) = '\0';
3435 }
3436
3437 /*
3438  * A function to fill simple commands of size 1.
3439  * Existing flags are preserved.
3440  */
3441 static void
3442 fill_cmd(ipfw_insn *cmd, enum ipfw_opcodes opcode, int flags, uint16_t arg)
3443 {
3444         cmd->opcode = opcode;
3445         cmd->len =  ((cmd->len | flags) & (F_NOT | F_OR)) | 1;
3446         cmd->arg1 = arg;
3447 }
3448
3449 /*
3450  * Fetch and add the MAC address and type, with masks. This generates one or
3451  * two microinstructions, and returns the pointer to the last one.
3452  */
3453 static ipfw_insn *
3454 add_mac(ipfw_insn *cmd, char *av[], int cblen)
3455 {
3456         ipfw_insn_mac *mac;
3457
3458         if ( ( av[0] == NULL ) || ( av[1] == NULL ) )
3459                 errx(EX_DATAERR, "MAC dst src");
3460
3461         cmd->opcode = O_MACADDR2;
3462         cmd->len = (cmd->len & (F_NOT | F_OR)) | F_INSN_SIZE(ipfw_insn_mac);
3463         CHECK_CMDLEN;
3464
3465         mac = (ipfw_insn_mac *)cmd;
3466         get_mac_addr_mask(av[0], mac->addr, mac->mask); /* dst */
3467         get_mac_addr_mask(av[1], &(mac->addr[ETHER_ADDR_LEN]),
3468             &(mac->mask[ETHER_ADDR_LEN])); /* src */
3469         return cmd;
3470 }
3471
3472 static ipfw_insn *
3473 add_mactype(ipfw_insn *cmd, char *av, int cblen)
3474 {
3475         if (!av)
3476                 errx(EX_DATAERR, "missing MAC type");
3477         if (strcmp(av, "any") != 0) { /* we have a non-null type */
3478                 fill_newports((ipfw_insn_u16 *)cmd, av, IPPROTO_ETHERTYPE,
3479                     cblen);
3480                 cmd->opcode = O_MAC_TYPE;
3481                 return cmd;
3482         } else
3483                 return NULL;
3484 }
3485
3486 static ipfw_insn *
3487 add_proto0(ipfw_insn *cmd, char *av, u_char *protop)
3488 {
3489         struct protoent *pe;
3490         char *ep;
3491         int proto;
3492
3493         proto = strtol(av, &ep, 10);
3494         if (*ep != '\0' || proto <= 0) {
3495                 if ((pe = getprotobyname(av)) == NULL)
3496                         return NULL;
3497                 proto = pe->p_proto;
3498         }
3499
3500         fill_cmd(cmd, O_PROTO, 0, proto);
3501         *protop = proto;
3502         return cmd;
3503 }
3504
3505 static ipfw_insn *
3506 add_proto(ipfw_insn *cmd, char *av, u_char *protop)
3507 {
3508         u_char proto = IPPROTO_IP;
3509
3510         if (_substrcmp(av, "all") == 0 || strcmp(av, "ip") == 0)
3511                 ; /* do not set O_IP4 nor O_IP6 */
3512         else if (strcmp(av, "ip4") == 0)
3513                 /* explicit "just IPv4" rule */
3514                 fill_cmd(cmd, O_IP4, 0, 0);
3515         else if (strcmp(av, "ip6") == 0) {
3516                 /* explicit "just IPv6" rule */
3517                 proto = IPPROTO_IPV6;
3518                 fill_cmd(cmd, O_IP6, 0, 0);
3519         } else
3520                 return add_proto0(cmd, av, protop);
3521
3522         *protop = proto;
3523         return cmd;
3524 }
3525
3526 static ipfw_insn *
3527 add_proto_compat(ipfw_insn *cmd, char *av, u_char *protop)
3528 {
3529         u_char proto = IPPROTO_IP;
3530
3531         if (_substrcmp(av, "all") == 0 || strcmp(av, "ip") == 0)
3532                 ; /* do not set O_IP4 nor O_IP6 */
3533         else if (strcmp(av, "ipv4") == 0 || strcmp(av, "ip4") == 0)
3534                 /* explicit "just IPv4" rule */
3535                 fill_cmd(cmd, O_IP4, 0, 0);
3536         else if (strcmp(av, "ipv6") == 0 || strcmp(av, "ip6") == 0) {
3537                 /* explicit "just IPv6" rule */
3538                 proto = IPPROTO_IPV6;
3539                 fill_cmd(cmd, O_IP6, 0, 0);
3540         } else
3541                 return add_proto0(cmd, av, protop);
3542
3543         *protop = proto;
3544         return cmd;
3545 }
3546
3547 static ipfw_insn *
3548 add_srcip(ipfw_insn *cmd, char *av, int cblen, struct tidx *tstate)
3549 {
3550         fill_ip((ipfw_insn_ip *)cmd, av, cblen, tstate);
3551         if (cmd->opcode == O_IP_DST_SET)                        /* set */
3552                 cmd->opcode = O_IP_SRC_SET;
3553         else if (cmd->opcode == O_IP_DST_LOOKUP)                /* table */
3554                 cmd->opcode = O_IP_SRC_LOOKUP;
3555         else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn))          /* me */
3556                 cmd->opcode = O_IP_SRC_ME;
3557         else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_u32))      /* one IP */
3558                 cmd->opcode = O_IP_SRC;
3559         else                                                    /* addr/mask */
3560                 cmd->opcode = O_IP_SRC_MASK;
3561         return cmd;
3562 }
3563
3564 static ipfw_insn *
3565 add_dstip(ipfw_insn *cmd, char *av, int cblen, struct tidx *tstate)
3566 {
3567         fill_ip((ipfw_insn_ip *)cmd, av, cblen, tstate);
3568         if (cmd->opcode == O_IP_DST_SET)                        /* set */
3569                 ;
3570         else if (cmd->opcode == O_IP_DST_LOOKUP)                /* table */
3571                 ;
3572         else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn))          /* me */
3573                 cmd->opcode = O_IP_DST_ME;
3574         else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_u32))      /* one IP */
3575                 cmd->opcode = O_IP_DST;
3576         else                                                    /* addr/mask */
3577                 cmd->opcode = O_IP_DST_MASK;
3578         return cmd;
3579 }
3580
3581 static struct _s_x f_reserved_keywords[] = {
3582         { "altq",       TOK_OR },
3583         { "//",         TOK_OR },
3584         { "diverted",   TOK_OR },
3585         { "dst-port",   TOK_OR },
3586         { "src-port",   TOK_OR },
3587         { "established",        TOK_OR },
3588         { "keep-state", TOK_OR },
3589         { "frag",       TOK_OR },
3590         { "icmptypes",  TOK_OR },
3591         { "in",         TOK_OR },
3592         { "out",        TOK_OR },
3593         { "ip6",        TOK_OR },
3594         { "any",        TOK_OR },
3595         { "to",         TOK_OR },
3596         { "via",        TOK_OR },
3597         { "{",          TOK_OR },
3598         { NULL, 0 }     /* terminator */
3599 };
3600
3601 static ipfw_insn *
3602 add_ports(ipfw_insn *cmd, char *av, u_char proto, int opcode, int cblen)
3603 {
3604
3605         if (match_token(f_reserved_keywords, av) != -1)
3606                 return (NULL);
3607
3608         if (fill_newports((ipfw_insn_u16 *)cmd, av, proto, cblen)) {
3609                 /* XXX todo: check that we have a protocol with ports */
3610                 cmd->opcode = opcode;
3611                 return cmd;
3612         }
3613         return NULL;
3614 }
3615
3616 static ipfw_insn *
3617 add_src(ipfw_insn *cmd, char *av, u_char proto, int cblen, struct tidx *tstate)
3618 {
3619         struct in6_addr a;
3620         char *host, *ch, buf[INET6_ADDRSTRLEN];
3621         ipfw_insn *ret = NULL;
3622         int len;
3623
3624         /* Copy first address in set if needed */
3625         if ((ch = strpbrk(av, "/,")) != NULL) {
3626                 len = ch - av;
3627                 strlcpy(buf, av, sizeof(buf));
3628                 if (len < sizeof(buf))
3629                         buf[len] = '\0';
3630                 host = buf;
3631         } else
3632                 host = av;
3633
3634         if (proto == IPPROTO_IPV6  || strcmp(av, "me6") == 0 ||
3635             inet_pton(AF_INET6, host, &a) == 1)
3636                 ret = add_srcip6(cmd, av, cblen, tstate);
3637         /* XXX: should check for IPv4, not !IPv6 */
3638         if (ret == NULL && (proto == IPPROTO_IP || strcmp(av, "me") == 0 ||
3639             inet_pton(AF_INET6, host, &a) != 1))
3640                 ret = add_srcip(cmd, av, cblen, tstate);
3641         if (ret == NULL && strcmp(av, "any") != 0)
3642                 ret = cmd;
3643
3644         return ret;
3645 }
3646
3647 static ipfw_insn *
3648 add_dst(ipfw_insn *cmd, char *av, u_char proto, int cblen, struct tidx *tstate)
3649 {
3650         struct in6_addr a;
3651         char *host, *ch, buf[INET6_ADDRSTRLEN];
3652         ipfw_insn *ret = NULL;
3653         int len;
3654
3655         /* Copy first address in set if needed */
3656         if ((ch = strpbrk(av, "/,")) != NULL) {
3657                 len = ch - av;
3658                 strlcpy(buf, av, sizeof(buf));
3659                 if (len < sizeof(buf))
3660                         buf[len] = '\0';
3661                 host = buf;
3662         } else
3663                 host = av;
3664
3665         if (proto == IPPROTO_IPV6  || strcmp(av, "me6") == 0 ||
3666             inet_pton(AF_INET6, host, &a) == 1)
3667                 ret = add_dstip6(cmd, av, cblen, tstate);
3668         /* XXX: should check for IPv4, not !IPv6 */
3669         if (ret == NULL && (proto == IPPROTO_IP || strcmp(av, "me") == 0 ||
3670             inet_pton(AF_INET6, host, &a) != 1))
3671                 ret = add_dstip(cmd, av, cblen, tstate);
3672         if (ret == NULL && strcmp(av, "any") != 0)
3673                 ret = cmd;
3674
3675         return ret;
3676 }
3677
3678 /*
3679  * Parse arguments and assemble the microinstructions which make up a rule.
3680  * Rules are added into the 'rulebuf' and then copied in the correct order
3681  * into the actual rule.
3682  *
3683  * The syntax for a rule starts with the action, followed by
3684  * optional action parameters, and the various match patterns.
3685  * In the assembled microcode, the first opcode must be an O_PROBE_STATE
3686  * (generated if the rule includes a keep-state option), then the
3687  * various match patterns, log/altq actions, and the actual action.
3688  *
3689  */
3690 void
3691 compile_rule(char *av[], uint32_t *rbuf, int *rbufsize, struct tidx *tstate)
3692 {
3693         /*
3694          * rules are added into the 'rulebuf' and then copied in
3695          * the correct order into the actual rule.
3696          * Some things that need to go out of order (prob, action etc.)
3697          * go into actbuf[].
3698          */
3699         static uint32_t actbuf[255], cmdbuf[255];
3700         int rblen, ablen, cblen;
3701
3702         ipfw_insn *src, *dst, *cmd, *action, *prev=NULL;
3703         ipfw_insn *first_cmd;   /* first match pattern */
3704
3705         struct ip_fw_rule *rule;
3706
3707         /*
3708          * various flags used to record that we entered some fields.
3709          */
3710         ipfw_insn *have_state = NULL;   /* check-state or keep-state */
3711         ipfw_insn *have_log = NULL, *have_altq = NULL, *have_tag = NULL;
3712         size_t len;
3713
3714         int i;
3715
3716         int open_par = 0;       /* open parenthesis ( */
3717
3718         /* proto is here because it is used to fetch ports */
3719         u_char proto = IPPROTO_IP;      /* default protocol */
3720
3721         double match_prob = 1; /* match probability, default is always match */
3722
3723         bzero(actbuf, sizeof(actbuf));          /* actions go here */
3724         bzero(cmdbuf, sizeof(cmdbuf));
3725         bzero(rbuf, *rbufsize);
3726
3727         rule = (struct ip_fw_rule *)rbuf;
3728         cmd = (ipfw_insn *)cmdbuf;
3729         action = (ipfw_insn *)actbuf;
3730
3731         rblen = *rbufsize / sizeof(uint32_t);
3732         rblen -= sizeof(struct ip_fw_rule) / sizeof(uint32_t);
3733         ablen = sizeof(actbuf) / sizeof(actbuf[0]);
3734         cblen = sizeof(cmdbuf) / sizeof(cmdbuf[0]);
3735         cblen -= F_INSN_SIZE(ipfw_insn_u32) + 1;
3736
3737 #define CHECK_RBUFLEN(len)      { CHECK_LENGTH(rblen, len); rblen -= len; }
3738 #define CHECK_ACTLEN            CHECK_LENGTH(ablen, action->len)
3739
3740         av++;
3741
3742         /* [rule N]     -- Rule number optional */
3743         if (av[0] && isdigit(**av)) {
3744                 rule->rulenum = atoi(*av);
3745                 av++;
3746         }
3747
3748         /* [set N]      -- set number (0..RESVD_SET), optional */
3749         if (av[0] && av[1] && _substrcmp(*av, "set") == 0) {
3750                 int set = strtoul(av[1], NULL, 10);
3751                 if (set < 0 || set > RESVD_SET)
3752                         errx(EX_DATAERR, "illegal set %s", av[1]);
3753                 rule->set = set;
3754                 tstate->set = set;
3755                 av += 2;
3756         }
3757
3758         /* [prob D]     -- match probability, optional */
3759         if (av[0] && av[1] && _substrcmp(*av, "prob") == 0) {
3760                 match_prob = strtod(av[1], NULL);
3761
3762                 if (match_prob <= 0 || match_prob > 1)
3763                         errx(EX_DATAERR, "illegal match prob. %s", av[1]);
3764                 av += 2;
3765         }
3766
3767         /* action       -- mandatory */
3768         NEED1("missing action");
3769         i = match_token(rule_actions, *av);
3770         av++;
3771         action->len = 1;        /* default */
3772         CHECK_ACTLEN;
3773         switch(i) {
3774         case TOK_CHECKSTATE:
3775                 have_state = action;
3776                 action->opcode = O_CHECK_STATE;
3777                 if (*av == NULL ||
3778                     match_token(rule_options, *av) == TOK_COMMENT) {
3779                         action->arg1 = pack_object(tstate,
3780                             default_state_name, IPFW_TLV_STATE_NAME);
3781                         break;
3782                 }
3783                 if (*av[0] == ':') {
3784                         if (strcmp(*av + 1, "any") == 0)
3785                                 action->arg1 = 0;
3786                         else if (state_check_name(*av + 1) == 0)
3787                                 action->arg1 = pack_object(tstate, *av + 1,
3788                                     IPFW_TLV_STATE_NAME);
3789                         else
3790                                 errx(EX_DATAERR, "Invalid state name %s",
3791                                     *av);
3792                         av++;
3793                         break;
3794                 }
3795                 errx(EX_DATAERR, "Invalid state name %s", *av);
3796                 break;
3797
3798         case TOK_ABORT:
3799                 action->opcode = O_REJECT;
3800                 action->arg1 = ICMP_REJECT_ABORT;
3801                 break;
3802
3803         case TOK_ABORT6:
3804                 action->opcode = O_UNREACH6;
3805                 action->arg1 = ICMP6_UNREACH_ABORT;
3806                 break;
3807
3808         case TOK_ACCEPT:
3809                 action->opcode = O_ACCEPT;
3810                 break;
3811
3812         case TOK_DENY:
3813                 action->opcode = O_DENY;
3814                 action->arg1 = 0;
3815                 break;
3816
3817         case TOK_REJECT:
3818                 action->opcode = O_REJECT;
3819                 action->arg1 = ICMP_UNREACH_HOST;
3820                 break;
3821
3822         case TOK_RESET:
3823                 action->opcode = O_REJECT;
3824                 action->arg1 = ICMP_REJECT_RST;
3825                 break;
3826
3827         case TOK_RESET6:
3828                 action->opcode = O_UNREACH6;
3829                 action->arg1 = ICMP6_UNREACH_RST;
3830                 break;
3831
3832         case TOK_UNREACH:
3833                 action->opcode = O_REJECT;
3834                 NEED1("missing reject code");
3835                 fill_reject_code(&action->arg1, *av);
3836                 av++;
3837                 break;
3838
3839         case TOK_UNREACH6:
3840                 action->opcode = O_UNREACH6;
3841                 NEED1("missing unreach code");
3842                 fill_unreach6_code(&action->arg1, *av);
3843                 av++;
3844                 break;
3845
3846         case TOK_COUNT:
3847                 action->opcode = O_COUNT;
3848                 break;
3849
3850         case TOK_NAT:
3851                 action->opcode = O_NAT;
3852                 action->len = F_INSN_SIZE(ipfw_insn_nat);
3853                 CHECK_ACTLEN;
3854                 if (*av != NULL && _substrcmp(*av, "global") == 0) {
3855                         action->arg1 = IP_FW_NAT44_GLOBAL;
3856                         av++;
3857                         break;
3858                 } else
3859                         goto chkarg;
3860         case TOK_QUEUE:
3861                 action->opcode = O_QUEUE;
3862                 goto chkarg;
3863         case TOK_PIPE:
3864                 action->opcode = O_PIPE;
3865                 goto chkarg;
3866         case TOK_SKIPTO:
3867                 action->opcode = O_SKIPTO;
3868                 goto chkarg;
3869         case TOK_NETGRAPH:
3870                 action->opcode = O_NETGRAPH;
3871                 goto chkarg;
3872         case TOK_NGTEE:
3873                 action->opcode = O_NGTEE;
3874                 goto chkarg;
3875         case TOK_DIVERT:
3876                 action->opcode = O_DIVERT;
3877                 goto chkarg;
3878         case TOK_TEE:
3879                 action->opcode = O_TEE;
3880                 goto chkarg;
3881         case TOK_CALL:
3882                 action->opcode = O_CALLRETURN;
3883 chkarg:
3884                 if (!av[0])
3885                         errx(EX_USAGE, "missing argument for %s", *(av - 1));
3886                 if (isdigit(**av)) {
3887                         action->arg1 = strtoul(*av, NULL, 10);
3888                         if (action->arg1 <= 0 || action->arg1 >= IP_FW_TABLEARG)
3889                                 errx(EX_DATAERR, "illegal argument for %s",
3890                                     *(av - 1));
3891                 } else if (_substrcmp(*av, "tablearg") == 0) {
3892                         action->arg1 = IP_FW_TARG;
3893                 } else if (i == TOK_DIVERT || i == TOK_TEE) {
3894                         struct servent *s;
3895                         setservent(1);
3896                         s = getservbyname(av[0], "divert");
3897                         if (s != NULL)
3898                                 action->arg1 = ntohs(s->s_port);
3899                         else
3900                                 errx(EX_DATAERR, "illegal divert/tee port");
3901                 } else
3902                         errx(EX_DATAERR, "illegal argument for %s", *(av - 1));
3903                 av++;
3904                 break;
3905
3906         case TOK_FORWARD: {
3907                 /*
3908                  * Locate the address-port separator (':' or ',').
3909                  * Could be one of the following:
3910                  *      hostname:port
3911                  *      IPv4 a.b.c.d,port
3912                  *      IPv4 a.b.c.d:port
3913                  *      IPv6 w:x:y::z,port
3914                  * The ':' can only be used with hostname and IPv4 address.
3915                  * XXX-BZ Should we also support [w:x:y::z]:port?
3916                  */
3917                 struct sockaddr_storage result;
3918                 struct addrinfo *res;
3919                 char *s, *end;
3920                 int family;
3921                 u_short port_number;
3922
3923                 NEED1("missing forward address[:port]");
3924
3925                 /*
3926                  * locate the address-port separator (':' or ',')
3927                  */
3928                 s = strchr(*av, ',');
3929                 if (s == NULL) {
3930                         /* Distinguish between IPv4:port and IPv6 cases. */
3931                         s = strchr(*av, ':');
3932                         if (s && strchr(s+1, ':'))
3933                                 s = NULL; /* no port */
3934                 }
3935
3936                 port_number = 0;
3937                 if (s != NULL) {
3938                         /* Terminate host portion and set s to start of port. */
3939                         *(s++) = '\0';
3940                         i = strtoport(s, &end, 0 /* base */, 0 /* proto */);
3941                         if (s == end)
3942                                 errx(EX_DATAERR,
3943                                     "illegal forwarding port ``%s''", s);
3944                         port_number = (u_short)i;
3945                 }
3946
3947                 if (_substrcmp(*av, "tablearg") == 0) {
3948                         family = PF_INET;
3949                         ((struct sockaddr_in*)&result)->sin_addr.s_addr =
3950                             INADDR_ANY;
3951                 } else {
3952                         /*
3953                          * Resolve the host name or address to a family and a
3954                          * network representation of the address.
3955                          */
3956                         if (getaddrinfo(*av, NULL, NULL, &res))
3957                                 errx(EX_DATAERR, NULL);
3958                         /* Just use the first host in the answer. */
3959                         family = res->ai_family;
3960                         memcpy(&result, res->ai_addr, res->ai_addrlen);
3961                         freeaddrinfo(res);
3962                 }
3963
3964                 if (family == PF_INET) {
3965                         ipfw_insn_sa *p = (ipfw_insn_sa *)action;
3966
3967                         action->opcode = O_FORWARD_IP;
3968                         action->len = F_INSN_SIZE(ipfw_insn_sa);
3969                         CHECK_ACTLEN;
3970
3971                         /*
3972                          * In the kernel we assume AF_INET and use only
3973                          * sin_port and sin_addr. Remember to set sin_len as
3974                          * the routing code seems to use it too.
3975                          */
3976                         p->sa.sin_len = sizeof(struct sockaddr_in);
3977                         p->sa.sin_family = AF_INET;
3978                         p->sa.sin_port = port_number;
3979                         p->sa.sin_addr.s_addr =
3980                              ((struct sockaddr_in *)&result)->sin_addr.s_addr;
3981                 } else if (family == PF_INET6) {
3982                         ipfw_insn_sa6 *p = (ipfw_insn_sa6 *)action;
3983
3984                         action->opcode = O_FORWARD_IP6;
3985                         action->len = F_INSN_SIZE(ipfw_insn_sa6);
3986                         CHECK_ACTLEN;
3987
3988                         p->sa.sin6_len = sizeof(struct sockaddr_in6);
3989                         p->sa.sin6_family = AF_INET6;
3990                         p->sa.sin6_port = port_number;
3991                         p->sa.sin6_flowinfo = 0;
3992                         p->sa.sin6_scope_id =
3993                             ((struct sockaddr_in6 *)&result)->sin6_scope_id;
3994                         bcopy(&((struct sockaddr_in6*)&result)->sin6_addr,
3995                             &p->sa.sin6_addr, sizeof(p->sa.sin6_addr));
3996                 } else {
3997                         errx(EX_DATAERR, "Invalid address family in forward action");
3998                 }
3999                 av++;
4000                 break;
4001             }
4002         case TOK_COMMENT:
4003                 /* pretend it is a 'count' rule followed by the comment */
4004                 action->opcode = O_COUNT;
4005                 av--;           /* go back... */
4006                 break;
4007
4008         case TOK_SETFIB:
4009             {
4010                 int numfibs;
4011                 size_t intsize = sizeof(int);
4012
4013                 action->opcode = O_SETFIB;
4014                 NEED1("missing fib number");
4015                 if (_substrcmp(*av, "tablearg") == 0) {
4016                         action->arg1 = IP_FW_TARG;
4017                 } else {
4018                         action->arg1 = strtoul(*av, NULL, 10);
4019                         if (sysctlbyname("net.fibs", &numfibs, &intsize,
4020                             NULL, 0) == -1)
4021                                 errx(EX_DATAERR, "fibs not suported.\n");
4022                         if (action->arg1 >= numfibs)  /* Temporary */
4023                                 errx(EX_DATAERR, "fib too large.\n");
4024                         /* Add high-order bit to fib to make room for tablearg*/
4025                         action->arg1 |= 0x8000;
4026                 }
4027                 av++;
4028                 break;
4029             }
4030
4031         case TOK_SETDSCP:
4032             {
4033                 int code;
4034
4035                 action->opcode = O_SETDSCP;
4036                 NEED1("missing DSCP code");
4037                 if (_substrcmp(*av, "tablearg") == 0) {
4038                         action->arg1 = IP_FW_TARG;
4039                 } else {
4040                         if (isalpha(*av[0])) {
4041                                 if ((code = match_token(f_ipdscp, *av)) == -1)
4042                                         errx(EX_DATAERR, "Unknown DSCP code");
4043                                 action->arg1 = code;
4044                         } else
4045                                 action->arg1 = strtoul(*av, NULL, 10);
4046                         /*
4047                          * Add high-order bit to DSCP to make room
4048                          * for tablearg
4049                          */
4050                         action->arg1 |= 0x8000;
4051                 }
4052                 av++;
4053                 break;
4054             }
4055
4056         case TOK_REASS:
4057                 action->opcode = O_REASS;
4058                 break;
4059
4060         case TOK_RETURN:
4061                 fill_cmd(action, O_CALLRETURN, F_NOT, 0);
4062                 break;
4063
4064         case TOK_TCPSETMSS: {
4065                 u_long mss;
4066                 uint16_t idx;
4067
4068                 idx = pack_object(tstate, "tcp-setmss", IPFW_TLV_EACTION);
4069                 if (idx == 0)
4070                         errx(EX_DATAERR, "pack_object failed");
4071                 fill_cmd(action, O_EXTERNAL_ACTION, 0, idx);
4072                 NEED1("Missing MSS value");
4073                 action = next_cmd(action, &ablen);
4074                 action->len = 1;
4075                 CHECK_ACTLEN;
4076                 mss = strtoul(*av, NULL, 10);
4077                 if (mss == 0 || mss > UINT16_MAX)
4078                         errx(EX_USAGE, "invalid MSS value %s", *av);
4079                 fill_cmd(action, O_EXTERNAL_DATA, 0, (uint16_t)mss);
4080                 av++;
4081                 break;
4082         }
4083
4084         default:
4085                 av--;
4086                 if (match_token(rule_eactions, *av) == -1)
4087                         errx(EX_DATAERR, "invalid action %s\n", *av);
4088                 /*
4089                  * External actions support.
4090                  * XXX: we support only syntax with instance name.
4091                  *      For known external actions (from rule_eactions list)
4092                  *      we can handle syntax directly. But with `eaction'
4093                  *      keyword we can use only `eaction <name> <instance>'
4094                  *      syntax.
4095                  */
4096         case TOK_EACTION: {
4097                 uint16_t idx;
4098
4099                 NEED1("Missing eaction name");
4100                 if (eaction_check_name(*av) != 0)
4101                         errx(EX_DATAERR, "Invalid eaction name %s", *av);
4102                 idx = pack_object(tstate, *av, IPFW_TLV_EACTION);
4103                 if (idx == 0)
4104                         errx(EX_DATAERR, "pack_object failed");
4105                 fill_cmd(action, O_EXTERNAL_ACTION, 0, idx);
4106                 av++;
4107                 NEED1("Missing eaction instance name");
4108                 action = next_cmd(action, &ablen);
4109                 action->len = 1;
4110                 CHECK_ACTLEN;
4111                 if (eaction_check_name(*av) != 0)
4112                         errx(EX_DATAERR, "Invalid eaction instance name %s",
4113                             *av);
4114                 /*
4115                  * External action instance object has TLV type depended
4116                  * from the external action name object index. Since we
4117                  * currently don't know this index, use zero as TLV type.
4118                  */
4119                 idx = pack_object(tstate, *av, 0);
4120                 if (idx == 0)
4121                         errx(EX_DATAERR, "pack_object failed");
4122                 fill_cmd(action, O_EXTERNAL_INSTANCE, 0, idx);
4123                 av++;
4124                 }
4125         }
4126         action = next_cmd(action, &ablen);
4127
4128         /*
4129          * [altq queuename] -- altq tag, optional
4130          * [log [logamount N]]  -- log, optional
4131          *
4132          * If they exist, it go first in the cmdbuf, but then it is
4133          * skipped in the copy section to the end of the buffer.
4134          */
4135         while (av[0] != NULL && (i = match_token(rule_action_params, *av)) != -1) {
4136                 av++;
4137                 switch (i) {
4138                 case TOK_LOG:
4139                     {
4140                         ipfw_insn_log *c = (ipfw_insn_log *)cmd;
4141                         int l;
4142
4143                         if (have_log)
4144                                 errx(EX_DATAERR,
4145                                     "log cannot be specified more than once");
4146                         have_log = (ipfw_insn *)c;
4147                         cmd->len = F_INSN_SIZE(ipfw_insn_log);
4148                         CHECK_CMDLEN;
4149                         cmd->opcode = O_LOG;
4150                         if (av[0] && _substrcmp(*av, "logamount") == 0) {
4151                                 av++;
4152                                 NEED1("logamount requires argument");
4153                                 l = atoi(*av);
4154                                 if (l < 0)
4155                                         errx(EX_DATAERR,
4156                                             "logamount must be positive");
4157                                 c->max_log = l;
4158                                 av++;
4159                         } else {
4160                                 len = sizeof(c->max_log);
4161                                 if (sysctlbyname("net.inet.ip.fw.verbose_limit",
4162                                     &c->max_log, &len, NULL, 0) == -1) {
4163                                         if (co.test_only) {
4164                                                 c->max_log = 0;
4165                                                 break;
4166                                         }
4167                                         errx(1, "sysctlbyname(\"%s\")",
4168                                             "net.inet.ip.fw.verbose_limit");
4169                                 }
4170                         }
4171                     }
4172                         break;
4173
4174 #ifndef NO_ALTQ
4175                 case TOK_ALTQ:
4176                     {
4177                         ipfw_insn_altq *a = (ipfw_insn_altq *)cmd;
4178
4179                         NEED1("missing altq queue name");
4180                         if (have_altq)
4181                                 errx(EX_DATAERR,
4182                                     "altq cannot be specified more than once");
4183                         have_altq = (ipfw_insn *)a;
4184                         cmd->len = F_INSN_SIZE(ipfw_insn_altq);
4185                         CHECK_CMDLEN;
4186                         cmd->opcode = O_ALTQ;
4187                         a->qid = altq_name_to_qid(*av);
4188                         av++;
4189                     }
4190                         break;
4191 #endif
4192
4193                 case TOK_TAG:
4194                 case TOK_UNTAG: {
4195                         uint16_t tag;
4196
4197                         if (have_tag)
4198                                 errx(EX_USAGE, "tag and untag cannot be "
4199                                     "specified more than once");
4200                         GET_UINT_ARG(tag, IPFW_ARG_MIN, IPFW_ARG_MAX, i,
4201                            rule_action_params);
4202                         have_tag = cmd;
4203                         fill_cmd(cmd, O_TAG, (i == TOK_TAG) ? 0: F_NOT, tag);
4204                         av++;
4205                         break;
4206                 }
4207
4208                 default:
4209                         abort();
4210                 }
4211                 cmd = next_cmd(cmd, &cblen);
4212         }
4213
4214         if (have_state) { /* must be a check-state, we are done */
4215                 if (*av != NULL &&
4216                     match_token(rule_options, *av) == TOK_COMMENT) {
4217                         /* check-state has a comment */
4218                         av++;
4219                         fill_comment(cmd, av, cblen);
4220                         cmd = next_cmd(cmd, &cblen);
4221                         av[0] = NULL;
4222                 }
4223                 goto done;
4224         }
4225
4226 #define OR_START(target)                                        \
4227         if (av[0] && (*av[0] == '(' || *av[0] == '{')) {        \
4228                 if (open_par)                                   \
4229                         errx(EX_USAGE, "nested \"(\" not allowed\n"); \
4230                 prev = NULL;                                    \
4231                 open_par = 1;                                   \
4232                 if ( (av[0])[1] == '\0') {                      \
4233                         av++;                                   \
4234                 } else                                          \
4235                         (*av)++;                                \
4236         }                                                       \
4237         target:                                                 \
4238
4239
4240 #define CLOSE_PAR                                               \
4241         if (open_par) {                                         \
4242                 if (av[0] && (                                  \
4243                     strcmp(*av, ")") == 0 ||                    \
4244                     strcmp(*av, "}") == 0)) {                   \
4245                         prev = NULL;                            \
4246                         open_par = 0;                           \
4247                         av++;                                   \
4248                 } else                                          \
4249                         errx(EX_USAGE, "missing \")\"\n");      \
4250         }
4251
4252 #define NOT_BLOCK                                               \
4253         if (av[0] && _substrcmp(*av, "not") == 0) {             \
4254                 if (cmd->len & F_NOT)                           \
4255                         errx(EX_USAGE, "double \"not\" not allowed\n"); \
4256                 cmd->len |= F_NOT;                              \
4257                 av++;                                           \
4258         }
4259
4260 #define OR_BLOCK(target)                                        \
4261         if (av[0] && _substrcmp(*av, "or") == 0) {              \
4262                 if (prev == NULL || open_par == 0)              \
4263                         errx(EX_DATAERR, "invalid OR block");   \
4264                 prev->len |= F_OR;                              \
4265                 av++;                                   \
4266                 goto target;                                    \
4267         }                                                       \
4268         CLOSE_PAR;
4269
4270         first_cmd = cmd;
4271
4272 #if 0
4273         /*
4274          * MAC addresses, optional.
4275          * If we have this, we skip the part "proto from src to dst"
4276          * and jump straight to the option parsing.
4277          */
4278         NOT_BLOCK;
4279         NEED1("missing protocol");
4280         if (_substrcmp(*av, "MAC") == 0 ||
4281             _substrcmp(*av, "mac") == 0) {
4282                 av++;                   /* the "MAC" keyword */
4283                 add_mac(cmd, av);       /* exits in case of errors */
4284                 cmd = next_cmd(cmd);
4285                 av += 2;                /* dst-mac and src-mac */
4286                 NOT_BLOCK;
4287                 NEED1("missing mac type");
4288                 if (add_mactype(cmd, av[0]))
4289                         cmd = next_cmd(cmd);
4290                 av++;                   /* any or mac-type */
4291                 goto read_options;
4292         }
4293 #endif
4294
4295         /*
4296          * protocol, mandatory
4297          */
4298     OR_START(get_proto);
4299         NOT_BLOCK;
4300         NEED1("missing protocol");
4301         if (add_proto_compat(cmd, *av, &proto)) {
4302                 av++;
4303                 if (F_LEN(cmd) != 0) {
4304                         prev = cmd;
4305                         cmd = next_cmd(cmd, &cblen);
4306                 }
4307         } else if (first_cmd != cmd) {
4308                 errx(EX_DATAERR, "invalid protocol ``%s''", *av);
4309         } else
4310                 goto read_options;
4311     OR_BLOCK(get_proto);
4312
4313         /*
4314          * "from", mandatory
4315          */
4316         if ((av[0] == NULL) || _substrcmp(*av, "from") != 0)
4317                 errx(EX_USAGE, "missing ``from''");
4318         av++;
4319
4320         /*
4321          * source IP, mandatory
4322          */
4323     OR_START(source_ip);
4324         NOT_BLOCK;      /* optional "not" */
4325         NEED1("missing source address");
4326         if (add_src(cmd, *av, proto, cblen, tstate)) {
4327                 av++;
4328                 if (F_LEN(cmd) != 0) {  /* ! any */
4329                         prev = cmd;
4330                         cmd = next_cmd(cmd, &cblen);
4331                 }
4332         } else
4333                 errx(EX_USAGE, "bad source address %s", *av);
4334     OR_BLOCK(source_ip);
4335
4336         /*
4337          * source ports, optional
4338          */
4339         NOT_BLOCK;      /* optional "not" */
4340         if ( av[0] != NULL ) {
4341                 if (_substrcmp(*av, "any") == 0 ||
4342                     add_ports(cmd, *av, proto, O_IP_SRCPORT, cblen)) {
4343                         av++;
4344                         if (F_LEN(cmd) != 0)
4345                                 cmd = next_cmd(cmd, &cblen);
4346                 }
4347         }
4348
4349         /*
4350          * "to", mandatory
4351          */
4352         if ( (av[0] == NULL) || _substrcmp(*av, "to") != 0 )
4353                 errx(EX_USAGE, "missing ``to''");
4354         av++;
4355
4356         /*
4357          * destination, mandatory
4358          */
4359     OR_START(dest_ip);
4360         NOT_BLOCK;      /* optional "not" */
4361         NEED1("missing dst address");
4362         if (add_dst(cmd, *av, proto, cblen, tstate)) {
4363                 av++;
4364                 if (F_LEN(cmd) != 0) {  /* ! any */
4365                         prev = cmd;
4366                         cmd = next_cmd(cmd, &cblen);
4367                 }
4368         } else
4369                 errx( EX_USAGE, "bad destination address %s", *av);
4370     OR_BLOCK(dest_ip);
4371
4372         /*
4373          * dest. ports, optional
4374          */
4375         NOT_BLOCK;      /* optional "not" */
4376         if (av[0]) {
4377                 if (_substrcmp(*av, "any") == 0 ||
4378                     add_ports(cmd, *av, proto, O_IP_DSTPORT, cblen)) {
4379                         av++;
4380                         if (F_LEN(cmd) != 0)
4381                                 cmd = next_cmd(cmd, &cblen);
4382                 }
4383         }
4384
4385 read_options:
4386         prev = NULL;
4387         while ( av[0] != NULL ) {
4388                 char *s;
4389                 ipfw_insn_u32 *cmd32;   /* alias for cmd */
4390
4391                 s = *av;
4392                 cmd32 = (ipfw_insn_u32 *)cmd;
4393
4394                 if (*s == '!') {        /* alternate syntax for NOT */
4395                         if (cmd->len & F_NOT)
4396                                 errx(EX_USAGE, "double \"not\" not allowed\n");
4397                         cmd->len = F_NOT;
4398                         s++;
4399                 }
4400                 i = match_token(rule_options, s);
4401                 av++;
4402                 switch(i) {
4403                 case TOK_NOT:
4404                         if (cmd->len & F_NOT)
4405                                 errx(EX_USAGE, "double \"not\" not allowed\n");
4406                         cmd->len = F_NOT;
4407                         break;
4408
4409                 case TOK_OR:
4410                         if (open_par == 0 || prev == NULL)
4411                                 errx(EX_USAGE, "invalid \"or\" block\n");
4412                         prev->len |= F_OR;
4413                         break;
4414
4415                 case TOK_STARTBRACE:
4416                         if (open_par)
4417                                 errx(EX_USAGE, "+nested \"(\" not allowed\n");
4418                         open_par = 1;
4419                         break;
4420
4421                 case TOK_ENDBRACE:
4422                         if (!open_par)
4423                                 errx(EX_USAGE, "+missing \")\"\n");
4424                         open_par = 0;
4425                         prev = NULL;
4426                         break;
4427
4428                 case TOK_IN:
4429                         fill_cmd(cmd, O_IN, 0, 0);
4430                         break;
4431
4432                 case TOK_OUT:
4433                         cmd->len ^= F_NOT; /* toggle F_NOT */
4434                         fill_cmd(cmd, O_IN, 0, 0);
4435                         break;
4436
4437                 case TOK_DIVERTED:
4438                         fill_cmd(cmd, O_DIVERTED, 0, 3);
4439                         break;
4440
4441                 case TOK_DIVERTEDLOOPBACK:
4442                         fill_cmd(cmd, O_DIVERTED, 0, 1);
4443                         break;
4444
4445                 case TOK_DIVERTEDOUTPUT:
4446                         fill_cmd(cmd, O_DIVERTED, 0, 2);
4447                         break;
4448
4449                 case TOK_FRAG:
4450                         fill_cmd(cmd, O_FRAG, 0, 0);
4451                         break;
4452
4453                 case TOK_LAYER2:
4454                         fill_cmd(cmd, O_LAYER2, 0, 0);
4455                         break;
4456
4457                 case TOK_XMIT:
4458                 case TOK_RECV:
4459                 case TOK_VIA:
4460                         NEED1("recv, xmit, via require interface name"
4461                                 " or address");
4462                         fill_iface((ipfw_insn_if *)cmd, av[0], cblen, tstate);
4463                         av++;
4464                         if (F_LEN(cmd) == 0)    /* not a valid address */
4465                                 break;
4466                         if (i == TOK_XMIT)
4467                                 cmd->opcode = O_XMIT;
4468                         else if (i == TOK_RECV)
4469                                 cmd->opcode = O_RECV;
4470                         else if (i == TOK_VIA)
4471                                 cmd->opcode = O_VIA;
4472                         break;
4473
4474                 case TOK_ICMPTYPES:
4475                         NEED1("icmptypes requires list of types");
4476                         fill_icmptypes((ipfw_insn_u32 *)cmd, *av);
4477                         av++;
4478                         break;
4479
4480                 case TOK_ICMP6TYPES:
4481                         NEED1("icmptypes requires list of types");
4482                         fill_icmp6types((ipfw_insn_icmp6 *)cmd, *av, cblen);
4483                         av++;
4484                         break;
4485
4486                 case TOK_IPTTL:
4487                         NEED1("ipttl requires TTL");
4488                         if (strpbrk(*av, "-,")) {
4489                             if (!add_ports(cmd, *av, 0, O_IPTTL, cblen))
4490                                 errx(EX_DATAERR, "invalid ipttl %s", *av);
4491                         } else
4492                             fill_cmd(cmd, O_IPTTL, 0, strtoul(*av, NULL, 0));
4493                         av++;
4494                         break;
4495
4496                 case TOK_IPID:
4497                         NEED1("ipid requires id");
4498                         if (strpbrk(*av, "-,")) {
4499                             if (!add_ports(cmd, *av, 0, O_IPID, cblen))
4500                                 errx(EX_DATAERR, "invalid ipid %s", *av);
4501                         } else
4502                             fill_cmd(cmd, O_IPID, 0, strtoul(*av, NULL, 0));
4503                         av++;
4504                         break;
4505
4506                 case TOK_IPLEN:
4507                         NEED1("iplen requires length");
4508                         if (strpbrk(*av, "-,")) {
4509                             if (!add_ports(cmd, *av, 0, O_IPLEN, cblen))
4510                                 errx(EX_DATAERR, "invalid ip len %s", *av);
4511                         } else
4512                             fill_cmd(cmd, O_IPLEN, 0, strtoul(*av, NULL, 0));
4513                         av++;
4514                         break;
4515
4516                 case TOK_IPVER:
4517                         NEED1("ipver requires version");
4518                         fill_cmd(cmd, O_IPVER, 0, strtoul(*av, NULL, 0));
4519                         av++;
4520                         break;
4521
4522                 case TOK_IPPRECEDENCE:
4523                         NEED1("ipprecedence requires value");
4524                         fill_cmd(cmd, O_IPPRECEDENCE, 0,
4525                             (strtoul(*av, NULL, 0) & 7) << 5);
4526                         av++;
4527                         break;
4528
4529                 case TOK_DSCP:
4530                         NEED1("missing DSCP code");
4531                         fill_dscp(cmd, *av, cblen);
4532                         av++;
4533                         break;
4534
4535                 case TOK_IPOPTS:
4536                         NEED1("missing argument for ipoptions");
4537                         fill_flags_cmd(cmd, O_IPOPT, f_ipopts, *av);
4538                         av++;
4539                         break;
4540
4541                 case TOK_IPTOS:
4542                         NEED1("missing argument for iptos");
4543                         fill_flags_cmd(cmd, O_IPTOS, f_iptos, *av);
4544                         av++;
4545                         break;
4546
4547                 case TOK_UID:
4548                         NEED1("uid requires argument");
4549                     {
4550                         char *end;
4551                         uid_t uid;
4552                         struct passwd *pwd;
4553
4554                         cmd->opcode = O_UID;
4555                         uid = strtoul(*av, &end, 0);
4556                         pwd = (*end == '\0') ? getpwuid(uid) : getpwnam(*av);
4557                         if (pwd == NULL)
4558                                 errx(EX_DATAERR, "uid \"%s\" nonexistent", *av);
4559                         cmd32->d[0] = pwd->pw_uid;
4560                         cmd->len |= F_INSN_SIZE(ipfw_insn_u32);
4561                         av++;
4562                     }
4563                         break;
4564
4565                 case TOK_GID:
4566                         NEED1("gid requires argument");
4567                     {
4568                         char *end;
4569                         gid_t gid;
4570                         struct group *grp;
4571
4572                         cmd->opcode = O_GID;
4573                         gid = strtoul(*av, &end, 0);
4574                         grp = (*end == '\0') ? getgrgid(gid) : getgrnam(*av);
4575                         if (grp == NULL)
4576                                 errx(EX_DATAERR, "gid \"%s\" nonexistent", *av);
4577                         cmd32->d[0] = grp->gr_gid;
4578                         cmd->len |= F_INSN_SIZE(ipfw_insn_u32);
4579                         av++;
4580                     }
4581                         break;
4582
4583                 case TOK_JAIL:
4584                         NEED1("jail requires argument");
4585                     {
4586                         char *end;
4587                         int jid;
4588
4589                         cmd->opcode = O_JAIL;
4590                         jid = (int)strtol(*av, &end, 0);
4591                         if (jid < 0 || *end != '\0')
4592                                 errx(EX_DATAERR, "jail requires prison ID");
4593                         cmd32->d[0] = (uint32_t)jid;
4594                         cmd->len |= F_INSN_SIZE(ipfw_insn_u32);
4595                         av++;
4596                     }
4597                         break;
4598
4599                 case TOK_ESTAB:
4600                         fill_cmd(cmd, O_ESTAB, 0, 0);
4601                         break;
4602
4603                 case TOK_SETUP:
4604                         fill_cmd(cmd, O_TCPFLAGS, 0,
4605                                 (TH_SYN) | ( (TH_ACK) & 0xff) <<8 );
4606                         break;
4607
4608                 case TOK_TCPDATALEN:
4609                         NEED1("tcpdatalen requires length");
4610                         if (strpbrk(*av, "-,")) {
4611                             if (!add_ports(cmd, *av, 0, O_TCPDATALEN, cblen))
4612                                 errx(EX_DATAERR, "invalid tcpdata len %s", *av);
4613                         } else
4614                             fill_cmd(cmd, O_TCPDATALEN, 0,
4615                                     strtoul(*av, NULL, 0));
4616                         av++;
4617                         break;
4618
4619                 case TOK_TCPOPTS:
4620                         NEED1("missing argument for tcpoptions");
4621                         fill_flags_cmd(cmd, O_TCPOPTS, f_tcpopts, *av);
4622                         av++;
4623                         break;
4624
4625                 case TOK_TCPSEQ:
4626                 case TOK_TCPACK:
4627                         NEED1("tcpseq/tcpack requires argument");
4628                         cmd->len = F_INSN_SIZE(ipfw_insn_u32);
4629                         cmd->opcode = (i == TOK_TCPSEQ) ? O_TCPSEQ : O_TCPACK;
4630                         cmd32->d[0] = htonl(strtoul(*av, NULL, 0));
4631                         av++;
4632                         break;
4633
4634                 case TOK_TCPWIN:
4635                         NEED1("tcpwin requires length");
4636                         if (strpbrk(*av, "-,")) {
4637                             if (!add_ports(cmd, *av, 0, O_TCPWIN, cblen))
4638                                 errx(EX_DATAERR, "invalid tcpwin len %s", *av);
4639                         } else
4640                             fill_cmd(cmd, O_TCPWIN, 0,
4641                                     strtoul(*av, NULL, 0));
4642                         av++;
4643                         break;
4644
4645                 case TOK_TCPFLAGS:
4646                         NEED1("missing argument for tcpflags");
4647                         cmd->opcode = O_TCPFLAGS;
4648                         fill_flags_cmd(cmd, O_TCPFLAGS, f_tcpflags, *av);
4649                         av++;
4650                         break;
4651
4652                 case TOK_KEEPSTATE: {
4653                         uint16_t uidx;
4654
4655                         if (open_par)
4656                                 errx(EX_USAGE, "keep-state cannot be part "
4657                                     "of an or block");
4658                         if (have_state)
4659                                 errx(EX_USAGE, "only one of keep-state "
4660                                         "and limit is allowed");
4661                         if (*av != NULL && *av[0] == ':') {
4662                                 if (state_check_name(*av + 1) != 0)
4663                                         errx(EX_DATAERR,
4664                                             "Invalid state name %s", *av);
4665                                 uidx = pack_object(tstate, *av + 1,
4666                                     IPFW_TLV_STATE_NAME);
4667                                 av++;
4668                         } else
4669                                 uidx = pack_object(tstate, default_state_name,
4670                                     IPFW_TLV_STATE_NAME);
4671                         have_state = cmd;
4672                         fill_cmd(cmd, O_KEEP_STATE, 0, uidx);
4673                         break;
4674                 }
4675
4676                 case TOK_LIMIT: {
4677                         ipfw_insn_limit *c = (ipfw_insn_limit *)cmd;
4678                         int val;
4679
4680                         if (open_par)
4681                                 errx(EX_USAGE,
4682                                     "limit cannot be part of an or block");
4683                         if (have_state)
4684                                 errx(EX_USAGE, "only one of keep-state and "
4685                                     "limit is allowed");
4686                         have_state = cmd;
4687
4688                         cmd->len = F_INSN_SIZE(ipfw_insn_limit);
4689                         CHECK_CMDLEN;
4690                         cmd->opcode = O_LIMIT;
4691                         c->limit_mask = c->conn_limit = 0;
4692
4693                         while ( av[0] != NULL ) {
4694                                 if ((val = match_token(limit_masks, *av)) <= 0)
4695                                         break;
4696                                 c->limit_mask |= val;
4697                                 av++;
4698                         }
4699
4700                         if (c->limit_mask == 0)
4701                                 errx(EX_USAGE, "limit: missing limit mask");
4702
4703                         GET_UINT_ARG(c->conn_limit, IPFW_ARG_MIN, IPFW_ARG_MAX,
4704                             TOK_LIMIT, rule_options);
4705                         av++;
4706
4707                         if (*av != NULL && *av[0] == ':') {
4708                                 if (state_check_name(*av + 1) != 0)
4709                                         errx(EX_DATAERR,
4710                                             "Invalid state name %s", *av);
4711                                 cmd->arg1 = pack_object(tstate, *av + 1,
4712                                     IPFW_TLV_STATE_NAME);
4713                                 av++;
4714                         } else
4715                                 cmd->arg1 = pack_object(tstate,
4716                                     default_state_name, IPFW_TLV_STATE_NAME);
4717                         break;
4718                 }
4719
4720                 case TOK_PROTO:
4721                         NEED1("missing protocol");
4722                         if (add_proto(cmd, *av, &proto)) {
4723                                 av++;
4724                         } else
4725                                 errx(EX_DATAERR, "invalid protocol ``%s''",
4726                                     *av);
4727                         break;
4728
4729                 case TOK_SRCIP:
4730                         NEED1("missing source IP");
4731                         if (add_srcip(cmd, *av, cblen, tstate)) {
4732                                 av++;
4733                         }
4734                         break;
4735
4736                 case TOK_DSTIP:
4737                         NEED1("missing destination IP");
4738                         if (add_dstip(cmd, *av, cblen, tstate)) {
4739                                 av++;
4740                         }
4741                         break;
4742
4743                 case TOK_SRCIP6:
4744                         NEED1("missing source IP6");
4745                         if (add_srcip6(cmd, *av, cblen, tstate)) {
4746                                 av++;
4747                         }
4748                         break;
4749
4750                 case TOK_DSTIP6:
4751                         NEED1("missing destination IP6");
4752                         if (add_dstip6(cmd, *av, cblen, tstate)) {
4753                                 av++;
4754                         }
4755                         break;
4756
4757                 case TOK_SRCPORT:
4758                         NEED1("missing source port");
4759                         if (_substrcmp(*av, "any") == 0 ||
4760                             add_ports(cmd, *av, proto, O_IP_SRCPORT, cblen)) {
4761                                 av++;
4762                         } else
4763                                 errx(EX_DATAERR, "invalid source port %s", *av);
4764                         break;
4765
4766                 case TOK_DSTPORT:
4767                         NEED1("missing destination port");
4768                         if (_substrcmp(*av, "any") == 0 ||
4769                             add_ports(cmd, *av, proto, O_IP_DSTPORT, cblen)) {
4770                                 av++;
4771                         } else
4772                                 errx(EX_DATAERR, "invalid destination port %s",
4773                                     *av);
4774                         break;
4775
4776                 case TOK_MAC:
4777                         if (add_mac(cmd, av, cblen))
4778                                 av += 2;
4779                         break;
4780
4781                 case TOK_MACTYPE:
4782                         NEED1("missing mac type");
4783                         if (!add_mactype(cmd, *av, cblen))
4784                                 errx(EX_DATAERR, "invalid mac type %s", *av);
4785                         av++;
4786                         break;
4787
4788                 case TOK_VERREVPATH:
4789                         fill_cmd(cmd, O_VERREVPATH, 0, 0);
4790                         break;
4791
4792                 case TOK_VERSRCREACH:
4793                         fill_cmd(cmd, O_VERSRCREACH, 0, 0);
4794                         break;
4795
4796                 case TOK_ANTISPOOF:
4797                         fill_cmd(cmd, O_ANTISPOOF, 0, 0);
4798                         break;
4799
4800                 case TOK_IPSEC:
4801                         fill_cmd(cmd, O_IPSEC, 0, 0);
4802                         break;
4803
4804                 case TOK_IPV6:
4805                         fill_cmd(cmd, O_IP6, 0, 0);
4806                         break;
4807
4808                 case TOK_IPV4:
4809                         fill_cmd(cmd, O_IP4, 0, 0);
4810                         break;
4811
4812                 case TOK_EXT6HDR:
4813                         fill_ext6hdr( cmd, *av );
4814                         av++;
4815                         break;
4816
4817                 case TOK_FLOWID:
4818                         if (proto != IPPROTO_IPV6 )
4819                                 errx( EX_USAGE, "flow-id filter is active "
4820                                     "only for ipv6 protocol\n");
4821                         fill_flow6( (ipfw_insn_u32 *) cmd, *av, cblen);
4822                         av++;
4823                         break;
4824
4825                 case TOK_COMMENT:
4826                         fill_comment(cmd, av, cblen);
4827                         av[0]=NULL;
4828                         break;
4829
4830                 case TOK_TAGGED:
4831                         if (av[0] && strpbrk(*av, "-,")) {
4832                                 if (!add_ports(cmd, *av, 0, O_TAGGED, cblen))
4833                                         errx(EX_DATAERR, "tagged: invalid tag"
4834                                             " list: %s", *av);
4835                         }
4836                         else {
4837                                 uint16_t tag;
4838
4839                                 GET_UINT_ARG(tag, IPFW_ARG_MIN, IPFW_ARG_MAX,
4840                                     TOK_TAGGED, rule_options);
4841                                 fill_cmd(cmd, O_TAGGED, 0, tag);
4842                         }
4843                         av++;
4844                         break;
4845
4846                 case TOK_FIB:
4847                         NEED1("fib requires fib number");
4848                         fill_cmd(cmd, O_FIB, 0, strtoul(*av, NULL, 0));
4849                         av++;
4850                         break;
4851                 case TOK_SOCKARG:
4852                         fill_cmd(cmd, O_SOCKARG, 0, 0);
4853                         break;
4854
4855                 case TOK_LOOKUP: {
4856                         ipfw_insn_u32 *c = (ipfw_insn_u32 *)cmd;
4857                         int j;
4858
4859                         if (!av[0] || !av[1])
4860                                 errx(EX_USAGE, "format: lookup argument tablenum");
4861                         cmd->opcode = O_IP_DST_LOOKUP;
4862                         cmd->len |= F_INSN_SIZE(ipfw_insn) + 2;
4863                         i = match_token(rule_options, *av);
4864                         for (j = 0; lookup_key[j] >= 0 ; j++) {
4865                                 if (i == lookup_key[j])
4866                                         break;
4867                         }
4868                         if (lookup_key[j] <= 0)
4869                                 errx(EX_USAGE, "format: cannot lookup on %s", *av);
4870                         __PAST_END(c->d, 1) = j; // i converted to option
4871                         av++;
4872
4873                         if ((j = pack_table(tstate, *av)) == 0)
4874                                 errx(EX_DATAERR, "Invalid table name: %s", *av);
4875
4876                         cmd->arg1 = j;
4877                         av++;
4878                     }
4879                         break;
4880                 case TOK_FLOW:
4881                         NEED1("missing table name");
4882                         if (strncmp(*av, "table(", 6) != 0)
4883                                 errx(EX_DATAERR,
4884                                     "enclose table name into \"table()\"");
4885                         fill_table(cmd, *av, O_IP_FLOW_LOOKUP, tstate);
4886                         av++;
4887                         break;
4888
4889                 default:
4890                         errx(EX_USAGE, "unrecognised option [%d] %s\n", i, s);
4891                 }
4892                 if (F_LEN(cmd) > 0) {   /* prepare to advance */
4893                         prev = cmd;
4894                         cmd = next_cmd(cmd, &cblen);
4895                 }
4896         }
4897
4898 done:
4899         /*
4900          * Now copy stuff into the rule.
4901          * If we have a keep-state option, the first instruction
4902          * must be a PROBE_STATE (which is generated here).
4903          * If we have a LOG option, it was stored as the first command,
4904          * and now must be moved to the top of the action part.
4905          */
4906         dst = (ipfw_insn *)rule->cmd;
4907
4908         /*
4909          * First thing to write into the command stream is the match probability.
4910          */
4911         if (match_prob != 1) { /* 1 means always match */
4912                 dst->opcode = O_PROB;
4913                 dst->len = 2;
4914                 *((int32_t *)(dst+1)) = (int32_t)(match_prob * 0x7fffffff);
4915                 dst += dst->len;
4916         }
4917
4918         /*
4919          * generate O_PROBE_STATE if necessary
4920          */
4921         if (have_state && have_state->opcode != O_CHECK_STATE) {
4922                 fill_cmd(dst, O_PROBE_STATE, 0, have_state->arg1);
4923                 dst = next_cmd(dst, &rblen);
4924         }
4925
4926         /* copy all commands but O_LOG, O_KEEP_STATE, O_LIMIT, O_ALTQ, O_TAG */
4927         for (src = (ipfw_insn *)cmdbuf; src != cmd; src += i) {
4928                 i = F_LEN(src);
4929                 CHECK_RBUFLEN(i);
4930
4931                 switch (src->opcode) {
4932                 case O_LOG:
4933                 case O_KEEP_STATE:
4934                 case O_LIMIT:
4935                 case O_ALTQ:
4936                 case O_TAG:
4937                         break;
4938                 default:
4939                         bcopy(src, dst, i * sizeof(uint32_t));
4940                         dst += i;
4941                 }
4942         }
4943
4944         /*
4945          * put back the have_state command as last opcode
4946          */
4947         if (have_state && have_state->opcode != O_CHECK_STATE) {
4948                 i = F_LEN(have_state);
4949                 CHECK_RBUFLEN(i);
4950                 bcopy(have_state, dst, i * sizeof(uint32_t));
4951                 dst += i;
4952         }
4953         /*
4954          * start action section
4955          */
4956         rule->act_ofs = dst - rule->cmd;
4957
4958         /* put back O_LOG, O_ALTQ, O_TAG if necessary */
4959         if (have_log) {
4960                 i = F_LEN(have_log);
4961                 CHECK_RBUFLEN(i);
4962                 bcopy(have_log, dst, i * sizeof(uint32_t));
4963                 dst += i;
4964         }
4965         if (have_altq) {
4966                 i = F_LEN(have_altq);
4967                 CHECK_RBUFLEN(i);
4968                 bcopy(have_altq, dst, i * sizeof(uint32_t));
4969                 dst += i;
4970         }
4971         if (have_tag) {
4972                 i = F_LEN(have_tag);
4973                 CHECK_RBUFLEN(i);
4974                 bcopy(have_tag, dst, i * sizeof(uint32_t));
4975                 dst += i;
4976         }
4977
4978         /*
4979          * copy all other actions
4980          */
4981         for (src = (ipfw_insn *)actbuf; src != action; src += i) {
4982                 i = F_LEN(src);
4983                 CHECK_RBUFLEN(i);
4984                 bcopy(src, dst, i * sizeof(uint32_t));
4985                 dst += i;
4986         }
4987
4988         rule->cmd_len = (uint32_t *)dst - (uint32_t *)(rule->cmd);
4989         *rbufsize = (char *)dst - (char *)rule;
4990 }
4991
4992 static int
4993 compare_ntlv(const void *_a, const void *_b)
4994 {
4995         ipfw_obj_ntlv *a, *b;
4996
4997         a = (ipfw_obj_ntlv *)_a;
4998         b = (ipfw_obj_ntlv *)_b;
4999
5000         if (a->set < b->set)
5001                 return (-1);
5002         else if (a->set > b->set)
5003                 return (1);
5004
5005         if (a->idx < b->idx)
5006                 return (-1);
5007         else if (a->idx > b->idx)
5008                 return (1);
5009
5010         if (a->head.type < b->head.type)
5011                 return (-1);
5012         else if (a->head.type > b->head.type)
5013                 return (1);
5014
5015         return (0);
5016 }
5017
5018 /*
5019  * Provide kernel with sorted list of referenced objects
5020  */
5021 static void
5022 object_sort_ctlv(ipfw_obj_ctlv *ctlv)
5023 {
5024
5025         qsort(ctlv + 1, ctlv->count, ctlv->objsize, compare_ntlv);
5026 }
5027
5028 struct object_kt {
5029         uint16_t        uidx;
5030         uint16_t        type;
5031 };
5032 static int
5033 compare_object_kntlv(const void *k, const void *v)
5034 {
5035         ipfw_obj_ntlv *ntlv;
5036         struct object_kt key;
5037
5038         key = *((struct object_kt *)k);
5039         ntlv = (ipfw_obj_ntlv *)v;
5040
5041         if (key.uidx < ntlv->idx)
5042                 return (-1);
5043         else if (key.uidx > ntlv->idx)
5044                 return (1);
5045
5046         if (key.type < ntlv->head.type)
5047                 return (-1);
5048         else if (key.type > ntlv->head.type)
5049                 return (1);
5050
5051         return (0);
5052 }
5053
5054 /*
5055  * Finds object name in @ctlv by @idx and @type.
5056  * Uses the following facts:
5057  * 1) All TLVs are the same size
5058  * 2) Kernel implementation provides already sorted list.
5059  *
5060  * Returns table name or NULL.
5061  */
5062 static char *
5063 object_search_ctlv(ipfw_obj_ctlv *ctlv, uint16_t idx, uint16_t type)
5064 {
5065         ipfw_obj_ntlv *ntlv;
5066         struct object_kt key;
5067
5068         key.uidx = idx;
5069         key.type = type;
5070
5071         ntlv = bsearch(&key, (ctlv + 1), ctlv->count, ctlv->objsize,
5072             compare_object_kntlv);
5073
5074         if (ntlv != NULL)
5075                 return (ntlv->name);
5076
5077         return (NULL);
5078 }
5079
5080 static char *
5081 table_search_ctlv(ipfw_obj_ctlv *ctlv, uint16_t idx)
5082 {
5083
5084         return (object_search_ctlv(ctlv, idx, IPFW_TLV_TBL_NAME));
5085 }
5086
5087 /*
5088  * Adds one or more rules to ipfw chain.
5089  * Data layout:
5090  * Request:
5091  * [
5092  *   ip_fw3_opheader
5093  *   [ ipfw_obj_ctlv(IPFW_TLV_TBL_LIST) ipfw_obj_ntlv x N ] (optional *1)
5094  *   [ ipfw_obj_ctlv(IPFW_TLV_RULE_LIST) [ ip_fw_rule ip_fw_insn ] x N ] (*2) (*3)
5095  * ]
5096  * Reply:
5097  * [
5098  *   ip_fw3_opheader
5099  *   [ ipfw_obj_ctlv(IPFW_TLV_TBL_LIST) ipfw_obj_ntlv x N ] (optional)
5100  *   [ ipfw_obj_ctlv(IPFW_TLV_RULE_LIST) [ ip_fw_rule ip_fw_insn ] x N ]
5101  * ]
5102  *
5103  * Rules in reply are modified to store their actual ruleset number.
5104  *
5105  * (*1) TLVs inside IPFW_TLV_TBL_LIST needs to be sorted ascending
5106  * according to their idx field and there has to be no duplicates.
5107  * (*2) Numbered rules inside IPFW_TLV_RULE_LIST needs to be sorted ascending.
5108  * (*3) Each ip_fw structure needs to be aligned to u64 boundary.
5109  */
5110 void
5111 ipfw_add(char *av[])
5112 {
5113         uint32_t rulebuf[1024];
5114         int rbufsize, default_off, tlen, rlen;
5115         size_t sz;
5116         struct tidx ts;
5117         struct ip_fw_rule *rule;
5118         caddr_t tbuf;
5119         ip_fw3_opheader *op3;
5120         ipfw_obj_ctlv *ctlv, *tstate;
5121
5122         rbufsize = sizeof(rulebuf);
5123         memset(rulebuf, 0, rbufsize);
5124         memset(&ts, 0, sizeof(ts));
5125
5126         /* Optimize case with no tables */
5127         default_off = sizeof(ipfw_obj_ctlv) + sizeof(ip_fw3_opheader);
5128         op3 = (ip_fw3_opheader *)rulebuf;
5129         ctlv = (ipfw_obj_ctlv *)(op3 + 1);
5130         rule = (struct ip_fw_rule *)(ctlv + 1);
5131         rbufsize -= default_off;
5132
5133         compile_rule(av, (uint32_t *)rule, &rbufsize, &ts);
5134         /* Align rule size to u64 boundary */
5135         rlen = roundup2(rbufsize, sizeof(uint64_t));
5136
5137         tbuf = NULL;
5138         sz = 0;
5139         tstate = NULL;
5140         if (ts.count != 0) {
5141                 /* Some tables. We have to alloc more data */
5142                 tlen = ts.count * sizeof(ipfw_obj_ntlv);
5143                 sz = default_off + sizeof(ipfw_obj_ctlv) + tlen + rlen;
5144
5145                 if ((tbuf = calloc(1, sz)) == NULL)
5146                         err(EX_UNAVAILABLE, "malloc() failed for IP_FW_ADD");
5147                 op3 = (ip_fw3_opheader *)tbuf;
5148                 /* Tables first */
5149                 ctlv = (ipfw_obj_ctlv *)(op3 + 1);
5150                 ctlv->head.type = IPFW_TLV_TBLNAME_LIST;
5151                 ctlv->head.length = sizeof(ipfw_obj_ctlv) + tlen;
5152                 ctlv->count = ts.count;
5153                 ctlv->objsize = sizeof(ipfw_obj_ntlv);
5154                 memcpy(ctlv + 1, ts.idx, tlen);
5155                 object_sort_ctlv(ctlv);
5156                 tstate = ctlv;
5157                 /* Rule next */
5158                 ctlv = (ipfw_obj_ctlv *)((caddr_t)ctlv + ctlv->head.length);
5159                 ctlv->head.type = IPFW_TLV_RULE_LIST;
5160                 ctlv->head.length = sizeof(ipfw_obj_ctlv) + rlen;
5161                 ctlv->count = 1;
5162                 memcpy(ctlv + 1, rule, rbufsize);
5163         } else {
5164                 /* Simply add header */
5165                 sz = rlen + default_off;
5166                 memset(ctlv, 0, sizeof(*ctlv));
5167                 ctlv->head.type = IPFW_TLV_RULE_LIST;
5168                 ctlv->head.length = sizeof(ipfw_obj_ctlv) + rlen;
5169                 ctlv->count = 1;
5170         }
5171
5172         if (do_get3(IP_FW_XADD, op3, &sz) != 0)
5173                 err(EX_UNAVAILABLE, "getsockopt(%s)", "IP_FW_XADD");
5174
5175         if (!co.do_quiet) {
5176                 struct format_opts sfo;
5177                 struct buf_pr bp;
5178                 memset(&sfo, 0, sizeof(sfo));
5179                 sfo.tstate = tstate;
5180                 sfo.set_mask = (uint32_t)(-1);
5181                 bp_alloc(&bp, 4096);
5182                 show_static_rule(&co, &sfo, &bp, rule, NULL);
5183                 printf("%s", bp.buf);
5184                 bp_free(&bp);
5185         }
5186
5187         if (tbuf != NULL)
5188                 free(tbuf);
5189
5190         if (ts.idx != NULL)
5191                 free(ts.idx);
5192 }
5193
5194 /*
5195  * clear the counters or the log counters.
5196  * optname has the following values:
5197  *  0 (zero both counters and logging)
5198  *  1 (zero logging only)
5199  */
5200 void
5201 ipfw_zero(int ac, char *av[], int optname)
5202 {
5203         ipfw_range_tlv rt;
5204         char const *errstr;
5205         char const *name = optname ? "RESETLOG" : "ZERO";
5206         uint32_t arg;
5207         int failed = EX_OK;
5208
5209         optname = optname ? IP_FW_XRESETLOG : IP_FW_XZERO;
5210         av++; ac--;
5211
5212         if (ac == 0) {
5213                 /* clear all entries */
5214                 memset(&rt, 0, sizeof(rt));
5215                 rt.flags = IPFW_RCFLAG_ALL;
5216                 if (do_range_cmd(optname, &rt) < 0)
5217                         err(EX_UNAVAILABLE, "setsockopt(IP_FW_X%s)", name);
5218                 if (!co.do_quiet)
5219                         printf("%s.\n", optname == IP_FW_XZERO ?
5220                             "Accounting cleared":"Logging counts reset");
5221
5222                 return;
5223         }
5224
5225         while (ac) {
5226                 /* Rule number */
5227                 if (isdigit(**av)) {
5228                         arg = strtonum(*av, 0, 0xffff, &errstr);
5229                         if (errstr)
5230                                 errx(EX_DATAERR,
5231                                     "invalid rule number %s\n", *av);
5232                         memset(&rt, 0, sizeof(rt));
5233                         rt.start_rule = arg;
5234                         rt.end_rule = arg;
5235                         rt.flags |= IPFW_RCFLAG_RANGE;
5236                         if (co.use_set != 0) {
5237                                 rt.set = co.use_set - 1;
5238                                 rt.flags |= IPFW_RCFLAG_SET;
5239                         }
5240                         if (do_range_cmd(optname, &rt) != 0) {
5241                                 warn("rule %u: setsockopt(IP_FW_X%s)",
5242                                     arg, name);
5243                                 failed = EX_UNAVAILABLE;
5244                         } else if (rt.new_set == 0) {
5245                                 printf("Entry %d not found\n", arg);
5246                                 failed = EX_UNAVAILABLE;
5247                         } else if (!co.do_quiet)
5248                                 printf("Entry %d %s.\n", arg,
5249                                     optname == IP_FW_XZERO ?
5250                                         "cleared" : "logging count reset");
5251                 } else {
5252                         errx(EX_USAGE, "invalid rule number ``%s''", *av);
5253                 }
5254                 av++; ac--;
5255         }
5256         if (failed != EX_OK)
5257                 exit(failed);
5258 }
5259
5260 void
5261 ipfw_flush(int force)
5262 {
5263         ipfw_range_tlv rt;
5264
5265         if (!force && !co.do_quiet) { /* need to ask user */
5266                 int c;
5267
5268                 printf("Are you sure? [yn] ");
5269                 fflush(stdout);
5270                 do {
5271                         c = toupper(getc(stdin));
5272                         while (c != '\n' && getc(stdin) != '\n')
5273                                 if (feof(stdin))
5274                                         return; /* and do not flush */
5275                 } while (c != 'Y' && c != 'N');
5276                 printf("\n");
5277                 if (c == 'N')   /* user said no */
5278                         return;
5279         }
5280         if (co.do_pipe) {
5281                 dummynet_flush();
5282                 return;
5283         }
5284         /* `ipfw set N flush` - is the same that `ipfw delete set N` */
5285         memset(&rt, 0, sizeof(rt));
5286         if (co.use_set != 0) {
5287                 rt.set = co.use_set - 1;
5288                 rt.flags = IPFW_RCFLAG_SET;
5289         } else
5290                 rt.flags = IPFW_RCFLAG_ALL;
5291         if (do_range_cmd(IP_FW_XDEL, &rt) != 0)
5292                         err(EX_UNAVAILABLE, "setsockopt(IP_FW_XDEL)");
5293         if (!co.do_quiet)
5294                 printf("Flushed all %s.\n", co.do_pipe ? "pipes" : "rules");
5295 }
5296
5297 static struct _s_x intcmds[] = {
5298       { "talist",       TOK_TALIST },
5299       { "iflist",       TOK_IFLIST },
5300       { "olist",        TOK_OLIST },
5301       { "vlist",        TOK_VLIST },
5302       { NULL, 0 }
5303 };
5304
5305 static struct _s_x otypes[] = {
5306         { "EACTION",    IPFW_TLV_EACTION },
5307         { "DYNSTATE",   IPFW_TLV_STATE_NAME },
5308         { NULL, 0 }
5309 };
5310
5311 static const char*
5312 lookup_eaction_name(ipfw_obj_ntlv *ntlv, int cnt, uint16_t type)
5313 {
5314         const char *name;
5315         int i;
5316
5317         name = NULL;
5318         for (i = 0; i < cnt; i++) {
5319                 if (ntlv[i].head.type != IPFW_TLV_EACTION)
5320                         continue;
5321                 if (IPFW_TLV_EACTION_NAME(ntlv[i].idx) != type)
5322                         continue;
5323                 name = ntlv[i].name;
5324                 break;
5325         }
5326         return (name);
5327 }
5328
5329 static void
5330 ipfw_list_objects(int ac, char *av[])
5331 {
5332         ipfw_obj_lheader req, *olh;
5333         ipfw_obj_ntlv *ntlv;
5334         const char *name;
5335         size_t sz;
5336         int i;
5337
5338         memset(&req, 0, sizeof(req));
5339         sz = sizeof(req);
5340         if (do_get3(IP_FW_DUMP_SRVOBJECTS, &req.opheader, &sz) != 0)
5341                 if (errno != ENOMEM)
5342                         return;
5343
5344         sz = req.size;
5345         if ((olh = calloc(1, sz)) == NULL)
5346                 return;
5347
5348         olh->size = sz;
5349         if (do_get3(IP_FW_DUMP_SRVOBJECTS, &olh->opheader, &sz) != 0) {
5350                 free(olh);
5351                 return;
5352         }
5353
5354         if (olh->count > 0)
5355                 printf("Objects list:\n");
5356         else
5357                 printf("There are no objects\n");
5358         ntlv = (ipfw_obj_ntlv *)(olh + 1);
5359         for (i = 0; i < olh->count; i++) {
5360                 name = match_value(otypes, ntlv->head.type);
5361                 if (name == NULL)
5362                         name = lookup_eaction_name(
5363                             (ipfw_obj_ntlv *)(olh + 1), olh->count,
5364                             ntlv->head.type);
5365                 if (name == NULL)
5366                         printf(" kidx: %4d\ttype: %10d\tname: %s\n",
5367                             ntlv->idx, ntlv->head.type, ntlv->name);
5368                 else
5369                         printf(" kidx: %4d\ttype: %10s\tname: %s\n",
5370                             ntlv->idx, name, ntlv->name);
5371                 ntlv++;
5372         }
5373         free(olh);
5374 }
5375
5376 void
5377 ipfw_internal_handler(int ac, char *av[])
5378 {
5379         int tcmd;
5380
5381         ac--; av++;
5382         NEED1("internal cmd required");
5383
5384         if ((tcmd = match_token(intcmds, *av)) == -1)
5385                 errx(EX_USAGE, "invalid internal sub-cmd: %s", *av);
5386
5387         switch (tcmd) {
5388         case TOK_IFLIST:
5389                 ipfw_list_tifaces();
5390                 break;
5391         case TOK_TALIST:
5392                 ipfw_list_ta(ac, av);
5393                 break;
5394         case TOK_OLIST:
5395                 ipfw_list_objects(ac, av);
5396                 break;
5397         case TOK_VLIST:
5398                 ipfw_list_values(ac, av);
5399                 break;
5400         }
5401 }
5402
5403 static int
5404 ipfw_get_tracked_ifaces(ipfw_obj_lheader **polh)
5405 {
5406         ipfw_obj_lheader req, *olh;
5407         size_t sz;
5408
5409         memset(&req, 0, sizeof(req));
5410         sz = sizeof(req);
5411
5412         if (do_get3(IP_FW_XIFLIST, &req.opheader, &sz) != 0) {
5413                 if (errno != ENOMEM)
5414                         return (errno);
5415         }
5416
5417         sz = req.size;
5418         if ((olh = calloc(1, sz)) == NULL)
5419                 return (ENOMEM);
5420
5421         olh->size = sz;
5422         if (do_get3(IP_FW_XIFLIST, &olh->opheader, &sz) != 0) {
5423                 free(olh);
5424                 return (errno);
5425         }
5426
5427         *polh = olh;
5428         return (0);
5429 }
5430
5431 static int
5432 ifinfo_cmp(const void *a, const void *b)
5433 {
5434         ipfw_iface_info *ia, *ib;
5435
5436         ia = (ipfw_iface_info *)a;
5437         ib = (ipfw_iface_info *)b;
5438
5439         return (stringnum_cmp(ia->ifname, ib->ifname));
5440 }
5441
5442 /*
5443  * Retrieves table list from kernel,
5444  * optionally sorts it and calls requested function for each table.
5445  * Returns 0 on success.
5446  */
5447 static void
5448 ipfw_list_tifaces()
5449 {
5450         ipfw_obj_lheader *olh;
5451         ipfw_iface_info *info;
5452         int i, error;
5453
5454         if ((error = ipfw_get_tracked_ifaces(&olh)) != 0)
5455                 err(EX_OSERR, "Unable to request ipfw tracked interface list");
5456
5457
5458         qsort(olh + 1, olh->count, olh->objsize, ifinfo_cmp);
5459
5460         info = (ipfw_iface_info *)(olh + 1);
5461         for (i = 0; i < olh->count; i++) {
5462                 if (info->flags & IPFW_IFFLAG_RESOLVED)
5463                         printf("%s ifindex: %d refcount: %u changes: %u\n",
5464                             info->ifname, info->ifindex, info->refcnt,
5465                             info->gencnt);
5466                 else
5467                         printf("%s ifindex: unresolved refcount: %u changes: %u\n",
5468                             info->ifname, info->refcnt, info->gencnt);
5469                 info = (ipfw_iface_info *)((caddr_t)info + olh->objsize);
5470         }
5471
5472         free(olh);
5473 }
5474
5475
5476
5477