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/socket.h>
  25 #include <sys/sockio.h>
  26 #include <sys/sysctl.h>
  27
  28 #include "ipfw2.h"
  29
  30 #include <ctype.h>
  31 #include <err.h>
  32 #include <errno.h>
  33 #include <grp.h>
  34 #include <netdb.h>
  35 #include <pwd.h>
  36 #include <stdio.h>
  37 #include <stdlib.h>
  38 #include <string.h>
  39 #include <sysexits.h>
  40 #include <timeconv.h>   /* _long_to_time */
  41 #include <unistd.h>
  42 #include <fcntl.h>
  43
  44 #define IPFW_INTERNAL   /* Access to protected structures in ip_fw.h. */
  45
  46 #include <net/ethernet.h>
  47 #include <net/if.h>
  48 #include <net/if_dl.h>
  49 #include <net/pfvar.h>
  50 #include <net/route.h> /* def. of struct route */
  51 #include <netinet/in.h>
  52 #include <netinet/in_systm.h>
  53 #include <netinet/ip.h>
  54 #include <netinet/ip_icmp.h>
  55 #include <netinet/icmp6.h>
  56 #include <netinet/ip_fw.h>
  57 #include <netinet/ip_dummynet.h>
  58 #include <netinet/tcp.h>
  59 #include <arpa/inet.h>
  60 #include <alias.h>
  61
  62 struct cmdline_opts co; /* global options */
  63
  64 int resvd_set_number = RESVD_SET;
  65
  66 #define GET_UINT_ARG(arg, min, max, tok, s_x) do {                      \
  67         if (!ac)                                                        \
  68                 errx(EX_USAGE, "%s: missing argument", match_value(s_x, tok)); \
  69         if (_substrcmp(*av, "tablearg") == 0) {                         \
  70                 arg = IP_FW_TABLEARG;                                   \
  71                 break;                                                  \
  72         }                                                               \
  73                                                                         \
  74         {                                                               \
  75         long val;                                                       \
  76         char *end;                                                      \
  77                                                                         \
  78         val = strtol(*av, &end, 10);                                    \
  79                                                                         \
  80         if (!isdigit(**av) || *end != '\0' || (val == 0 && errno == EINVAL)) \
  81                 errx(EX_DATAERR, "%s: invalid argument: %s",            \
  82                     match_value(s_x, tok), *av);                        \
  83                                                                         \
  84         if (errno == ERANGE || val < min || val > max)                  \
  85                 errx(EX_DATAERR, "%s: argument is out of range (%u..%u): %s", \
  86                     match_value(s_x, tok), min, max, *av);              \
  87                                                                         \
  88         if (val == IP_FW_TABLEARG)                                      \
  89                 errx(EX_DATAERR, "%s: illegal argument value: %s",      \
  90                     match_value(s_x, tok), *av);                        \
  91         arg = val;                                                      \
  92         }                                                               \
  93 } while (0)
  94
  95 static void
  96 PRINT_UINT_ARG(const char *str, uint32_t arg)
  97 {
  98         if (str != NULL)
  99                 printf("%s",str);
 100         if (arg == IP_FW_TABLEARG)
 101                 printf("tablearg");
 102         else
 103                 printf("%u", arg);
 104 }
 105
 106 static struct _s_x f_tcpflags[] = {
 107         { "syn", TH_SYN },
 108         { "fin", TH_FIN },
 109         { "ack", TH_ACK },
 110         { "psh", TH_PUSH },
 111         { "rst", TH_RST },
 112         { "urg", TH_URG },
 113         { "tcp flag", 0 },
 114         { NULL, 0 }
 115 };
 116
 117 static struct _s_x f_tcpopts[] = {
 118         { "mss",        IP_FW_TCPOPT_MSS },
 119         { "maxseg",     IP_FW_TCPOPT_MSS },
 120         { "window",     IP_FW_TCPOPT_WINDOW },
 121         { "sack",       IP_FW_TCPOPT_SACK },
 122         { "ts",         IP_FW_TCPOPT_TS },
 123         { "timestamp",  IP_FW_TCPOPT_TS },
 124         { "cc",         IP_FW_TCPOPT_CC },
 125         { "tcp option", 0 },
 126         { NULL, 0 }
 127 };
 128
 129 /*
 130  * IP options span the range 0 to 255 so we need to remap them
 131  * (though in fact only the low 5 bits are significant).
 132  */
 133 static struct _s_x f_ipopts[] = {
 134         { "ssrr",       IP_FW_IPOPT_SSRR},
 135         { "lsrr",       IP_FW_IPOPT_LSRR},
 136         { "rr",         IP_FW_IPOPT_RR},
 137         { "ts",         IP_FW_IPOPT_TS},
 138         { "ip option",  0 },
 139         { NULL, 0 }
 140 };
 141
 142 static struct _s_x f_iptos[] = {
 143         { "lowdelay",   IPTOS_LOWDELAY},
 144         { "throughput", IPTOS_THROUGHPUT},
 145         { "reliability", IPTOS_RELIABILITY},
 146         { "mincost",    IPTOS_MINCOST},
 147         { "congestion", IPTOS_ECN_CE},
 148         { "ecntransport", IPTOS_ECN_ECT0},
 149         { "ip tos option", 0},
 150         { NULL, 0 }
 151 };
 152
 153 static struct _s_x limit_masks[] = {
 154         {"all",         DYN_SRC_ADDR|DYN_SRC_PORT|DYN_DST_ADDR|DYN_DST_PORT},
 155         {"src-addr",    DYN_SRC_ADDR},
 156         {"src-port",    DYN_SRC_PORT},
 157         {"dst-addr",    DYN_DST_ADDR},
 158         {"dst-port",    DYN_DST_PORT},
 159         {NULL,          0}
 160 };
 161
 162 /*
 163  * we use IPPROTO_ETHERTYPE as a fake protocol id to call the print routines
 164  * This is only used in this code.
 165  */
 166 #define IPPROTO_ETHERTYPE       0x1000
 167 static struct _s_x ether_types[] = {
 168     /*
 169      * Note, we cannot use "-:&/" in the names because they are field
 170      * separators in the type specifications. Also, we use s = NULL as
 171      * end-delimiter, because a type of 0 can be legal.
 172      */
 173         { "ip",         0x0800 },
 174         { "ipv4",       0x0800 },
 175         { "ipv6",       0x86dd },
 176         { "arp",        0x0806 },
 177         { "rarp",       0x8035 },
 178         { "vlan",       0x8100 },
 179         { "loop",       0x9000 },
 180         { "trail",      0x1000 },
 181         { "at",         0x809b },
 182         { "atalk",      0x809b },
 183         { "aarp",       0x80f3 },
 184         { "pppoe_disc", 0x8863 },
 185         { "pppoe_sess", 0x8864 },
 186         { "ipx_8022",   0x00E0 },
 187         { "ipx_8023",   0x0000 },
 188         { "ipx_ii",     0x8137 },
 189         { "ipx_snap",   0x8137 },
 190         { "ipx",        0x8137 },
 191         { "ns",         0x0600 },
 192         { NULL,         0 }
 193 };
 194
 195 enum tokens {
 196         TOK_NULL=0,
 197
 198         TOK_OR,
 199         TOK_NOT,
 200         TOK_STARTBRACE,
 201         TOK_ENDBRACE,
 202
 203         TOK_ACCEPT,
 204         TOK_COUNT,
 205         TOK_PIPE,
 206         TOK_QUEUE,
 207         TOK_DIVERT,
 208         TOK_TEE,
 209         TOK_NETGRAPH,
 210         TOK_NGTEE,
 211         TOK_FORWARD,
 212         TOK_SKIPTO,
 213         TOK_DENY,
 214         TOK_REJECT,
 215         TOK_RESET,
 216         TOK_UNREACH,
 217         TOK_CHECKSTATE,
 218         TOK_NAT,
 219
 220         TOK_ALTQ,
 221         TOK_LOG,
 222         TOK_TAG,
 223         TOK_UNTAG,
 224
 225         TOK_TAGGED,
 226         TOK_UID,
 227         TOK_GID,
 228         TOK_JAIL,
 229         TOK_IN,
 230         TOK_LIMIT,
 231         TOK_KEEPSTATE,
 232         TOK_LAYER2,
 233         TOK_OUT,
 234         TOK_DIVERTED,
 235         TOK_DIVERTEDLOOPBACK,
 236         TOK_DIVERTEDOUTPUT,
 237         TOK_XMIT,
 238         TOK_RECV,
 239         TOK_VIA,
 240         TOK_FRAG,
 241         TOK_IPOPTS,
 242         TOK_IPLEN,
 243         TOK_IPID,
 244         TOK_IPPRECEDENCE,
 245         TOK_IPTOS,
 246         TOK_IPTTL,
 247         TOK_IPVER,
 248         TOK_ESTAB,
 249         TOK_SETUP,
 250         TOK_TCPDATALEN,
 251         TOK_TCPFLAGS,
 252         TOK_TCPOPTS,
 253         TOK_TCPSEQ,
 254         TOK_TCPACK,
 255         TOK_TCPWIN,
 256         TOK_ICMPTYPES,
 257         TOK_MAC,
 258         TOK_MACTYPE,
 259         TOK_VERREVPATH,
 260         TOK_VERSRCREACH,
 261         TOK_ANTISPOOF,
 262         TOK_IPSEC,
 263         TOK_COMMENT,
 264
 265         TOK_PLR,
 266         TOK_NOERROR,
 267         TOK_BUCKETS,
 268         TOK_DSTIP,
 269         TOK_SRCIP,
 270         TOK_DSTPORT,
 271         TOK_SRCPORT,
 272         TOK_ALL,
 273         TOK_MASK,
 274         TOK_BW,
 275         TOK_DELAY,
 276         TOK_RED,
 277         TOK_GRED,
 278         TOK_DROPTAIL,
 279         TOK_PROTO,
 280         TOK_WEIGHT,
 281         TOK_IP,
 282         TOK_IF,
 283         TOK_ALOG,
 284         TOK_DENY_INC,
 285         TOK_SAME_PORTS,
 286         TOK_UNREG_ONLY,
 287         TOK_RESET_ADDR,
 288         TOK_ALIAS_REV,
 289         TOK_PROXY_ONLY,
 290         TOK_REDIR_ADDR,
 291         TOK_REDIR_PORT,
 292         TOK_REDIR_PROTO,
 293
 294         TOK_IPV6,
 295         TOK_FLOWID,
 296         TOK_ICMP6TYPES,
 297         TOK_EXT6HDR,
 298         TOK_DSTIP6,
 299         TOK_SRCIP6,
 300
 301         TOK_IPV4,
 302         TOK_UNREACH6,
 303         TOK_RESET6,
 304
 305         TOK_FIB,
 306         TOK_SETFIB,
 307 };
 308
 309 struct _s_x dummynet_params[] = {
 310         { "plr",                TOK_PLR },
 311         { "noerror",            TOK_NOERROR },
 312         { "buckets",            TOK_BUCKETS },
 313         { "dst-ip",             TOK_DSTIP },
 314         { "src-ip",             TOK_SRCIP },
 315         { "dst-port",           TOK_DSTPORT },
 316         { "src-port",           TOK_SRCPORT },
 317         { "proto",              TOK_PROTO },
 318         { "weight",             TOK_WEIGHT },
 319         { "all",                TOK_ALL },
 320         { "mask",               TOK_MASK },
 321         { "droptail",           TOK_DROPTAIL },
 322         { "red",                TOK_RED },
 323         { "gred",               TOK_GRED },
 324         { "bw",                 TOK_BW },
 325         { "bandwidth",          TOK_BW },
 326         { "delay",              TOK_DELAY },
 327         { "pipe",               TOK_PIPE },
 328         { "queue",              TOK_QUEUE },
 329         { "flow-id",            TOK_FLOWID},
 330         { "dst-ipv6",           TOK_DSTIP6},
 331         { "dst-ip6",            TOK_DSTIP6},
 332         { "src-ipv6",           TOK_SRCIP6},
 333         { "src-ip6",            TOK_SRCIP6},
 334         { "dummynet-params",    TOK_NULL },
 335         { NULL, 0 }     /* terminator */
 336 };
 337
 338 struct _s_x nat_params[] = {
 339         { "ip",                 TOK_IP },
 340         { "if",                 TOK_IF },
 341         { "log",                TOK_ALOG },
 342         { "deny_in",            TOK_DENY_INC },
 343         { "same_ports",         TOK_SAME_PORTS },
 344         { "unreg_only",         TOK_UNREG_ONLY },
 345         { "reset",              TOK_RESET_ADDR },
 346         { "reverse",            TOK_ALIAS_REV },
 347         { "proxy_only",         TOK_PROXY_ONLY },
 348         { "redirect_addr",      TOK_REDIR_ADDR },
 349         { "redirect_port",      TOK_REDIR_PORT },
 350         { "redirect_proto",     TOK_REDIR_PROTO },
 351         { NULL, 0 }     /* terminator */
 352 };
 353
 354 struct _s_x rule_actions[] = {
 355         { "accept",             TOK_ACCEPT },
 356         { "pass",               TOK_ACCEPT },
 357         { "allow",              TOK_ACCEPT },
 358         { "permit",             TOK_ACCEPT },
 359         { "count",              TOK_COUNT },
 360         { "pipe",               TOK_PIPE },
 361         { "queue",              TOK_QUEUE },
 362         { "divert",             TOK_DIVERT },
 363         { "tee",                TOK_TEE },
 364         { "netgraph",           TOK_NETGRAPH },
 365         { "ngtee",              TOK_NGTEE },
 366         { "fwd",                TOK_FORWARD },
 367         { "forward",            TOK_FORWARD },
 368         { "skipto",             TOK_SKIPTO },
 369         { "deny",               TOK_DENY },
 370         { "drop",               TOK_DENY },
 371         { "reject",             TOK_REJECT },
 372         { "reset6",             TOK_RESET6 },
 373         { "reset",              TOK_RESET },
 374         { "unreach6",           TOK_UNREACH6 },
 375         { "unreach",            TOK_UNREACH },
 376         { "check-state",        TOK_CHECKSTATE },
 377         { "//",                 TOK_COMMENT },
 378         { "nat",                TOK_NAT },
 379         { "setfib",             TOK_SETFIB },
 380         { NULL, 0 }     /* terminator */
 381 };
 382
 383 struct _s_x rule_action_params[] = {
 384         { "altq",               TOK_ALTQ },
 385         { "log",                TOK_LOG },
 386         { "tag",                TOK_TAG },
 387         { "untag",              TOK_UNTAG },
 388         { NULL, 0 }     /* terminator */
 389 };
 390
 391 struct _s_x rule_options[] = {
 392         { "tagged",             TOK_TAGGED },
 393         { "uid",                TOK_UID },
 394         { "gid",                TOK_GID },
 395         { "jail",               TOK_JAIL },
 396         { "in",                 TOK_IN },
 397         { "limit",              TOK_LIMIT },
 398         { "keep-state",         TOK_KEEPSTATE },
 399         { "bridged",            TOK_LAYER2 },
 400         { "layer2",             TOK_LAYER2 },
 401         { "out",                TOK_OUT },
 402         { "diverted",           TOK_DIVERTED },
 403         { "diverted-loopback",  TOK_DIVERTEDLOOPBACK },
 404         { "diverted-output",    TOK_DIVERTEDOUTPUT },
 405         { "xmit",               TOK_XMIT },
 406         { "recv",               TOK_RECV },
 407         { "via",                TOK_VIA },
 408         { "fragment",           TOK_FRAG },
 409         { "frag",               TOK_FRAG },
 410         { "fib",                TOK_FIB },
 411         { "ipoptions",          TOK_IPOPTS },
 412         { "ipopts",             TOK_IPOPTS },
 413         { "iplen",              TOK_IPLEN },
 414         { "ipid",               TOK_IPID },
 415         { "ipprecedence",       TOK_IPPRECEDENCE },
 416         { "iptos",              TOK_IPTOS },
 417         { "ipttl",              TOK_IPTTL },
 418         { "ipversion",          TOK_IPVER },
 419         { "ipver",              TOK_IPVER },
 420         { "estab",              TOK_ESTAB },
 421         { "established",        TOK_ESTAB },
 422         { "setup",              TOK_SETUP },
 423         { "tcpdatalen",         TOK_TCPDATALEN },
 424         { "tcpflags",           TOK_TCPFLAGS },
 425         { "tcpflgs",            TOK_TCPFLAGS },
 426         { "tcpoptions",         TOK_TCPOPTS },
 427         { "tcpopts",            TOK_TCPOPTS },
 428         { "tcpseq",             TOK_TCPSEQ },
 429         { "tcpack",             TOK_TCPACK },
 430         { "tcpwin",             TOK_TCPWIN },
 431         { "icmptype",           TOK_ICMPTYPES },
 432         { "icmptypes",          TOK_ICMPTYPES },
 433         { "dst-ip",             TOK_DSTIP },
 434         { "src-ip",             TOK_SRCIP },
 435         { "dst-port",           TOK_DSTPORT },
 436         { "src-port",           TOK_SRCPORT },
 437         { "proto",              TOK_PROTO },
 438         { "MAC",                TOK_MAC },
 439         { "mac",                TOK_MAC },
 440         { "mac-type",           TOK_MACTYPE },
 441         { "verrevpath",         TOK_VERREVPATH },
 442         { "versrcreach",        TOK_VERSRCREACH },
 443         { "antispoof",          TOK_ANTISPOOF },
 444         { "ipsec",              TOK_IPSEC },
 445         { "icmp6type",          TOK_ICMP6TYPES },
 446         { "icmp6types",         TOK_ICMP6TYPES },
 447         { "ext6hdr",            TOK_EXT6HDR},
 448         { "flow-id",            TOK_FLOWID},
 449         { "ipv6",               TOK_IPV6},
 450         { "ip6",                TOK_IPV6},
 451         { "ipv4",               TOK_IPV4},
 452         { "ip4",                TOK_IPV4},
 453         { "dst-ipv6",           TOK_DSTIP6},
 454         { "dst-ip6",            TOK_DSTIP6},
 455         { "src-ipv6",           TOK_SRCIP6},
 456         { "src-ip6",            TOK_SRCIP6},
 457         { "//",                 TOK_COMMENT },
 458
 459         { "not",                TOK_NOT },              /* pseudo option */
 460         { "!", /* escape ? */   TOK_NOT },              /* pseudo option */
 461         { "or",                 TOK_OR },               /* pseudo option */
 462         { "|", /* escape */     TOK_OR },               /* pseudo option */
 463         { "{",                  TOK_STARTBRACE },       /* pseudo option */
 464         { "(",                  TOK_STARTBRACE },       /* pseudo option */
 465         { "}",                  TOK_ENDBRACE },         /* pseudo option */
 466         { ")",                  TOK_ENDBRACE },         /* pseudo option */
 467         { NULL, 0 }     /* terminator */
 468 };
 469
 470 static __inline uint64_t
 471 align_uint64(uint64_t *pll) {
 472         uint64_t ret;
 473
 474         bcopy (pll, &ret, sizeof(ret));
 475         return ret;
 476 }
 477
 478 void *
 479 safe_calloc(size_t number, size_t size)
 480 {
 481         void *ret = calloc(number, size);
 482
 483         if (ret == NULL)
 484                 err(EX_OSERR, "calloc");
 485         return ret;
 486 }
 487
 488 void *
 489 safe_realloc(void *ptr, size_t size)
 490 {
 491         void *ret = realloc(ptr, size);
 492
 493         if (ret == NULL)
 494                 err(EX_OSERR, "realloc");
 495         return ret;
 496 }
 497
 498 /*
 499  * conditionally runs the command.
 500  */
 501 static int
 502 do_cmd(int optname, void *optval, uintptr_t optlen)
 503 {
 504         static int s = -1;      /* the socket */
 505         int i;
 506
 507         if (co.test_only)
 508                 return 0;
 509
 510         if (s == -1)
 511                 s = socket(AF_INET, SOCK_RAW, IPPROTO_RAW);
 512         if (s < 0)
 513                 err(EX_UNAVAILABLE, "socket");
 514
 515         if (optname == IP_FW_GET || optname == IP_DUMMYNET_GET ||
 516             optname == IP_FW_ADD || optname == IP_FW_TABLE_LIST ||
 517             optname == IP_FW_TABLE_GETSIZE ||
 518             optname == IP_FW_NAT_GET_CONFIG ||
 519             optname == IP_FW_NAT_GET_LOG)
 520                 i = getsockopt(s, IPPROTO_IP, optname, optval,
 521                         (socklen_t *)optlen);
 522         else
 523                 i = setsockopt(s, IPPROTO_IP, optname, optval, optlen);
 524         return i;
 525 }
 526
 527 /**
 528  * match_token takes a table and a string, returns the value associated
 529  * with the string (-1 in case of failure).
 530  */
 531 static int
 532 match_token(struct _s_x *table, char *string)
 533 {
 534         struct _s_x *pt;
 535         uint i = strlen(string);
 536
 537         for (pt = table ; i && pt->s != NULL ; pt++)
 538                 if (strlen(pt->s) == i && !bcmp(string, pt->s, i))
 539                         return pt->x;
 540         return -1;
 541 }
 542
 543 /**
 544  * match_value takes a table and a value, returns the string associated
 545  * with the value (NULL in case of failure).
 546  */
 547 static char const *
 548 match_value(struct _s_x *p, int value)
 549 {
 550         for (; p->s != NULL; p++)
 551                 if (p->x == value)
 552                         return p->s;
 553         return NULL;
 554 }
 555
 556 /*
 557  * _substrcmp takes two strings and returns 1 if they do not match,
 558  * and 0 if they match exactly or the first string is a sub-string
 559  * of the second.  A warning is printed to stderr in the case that the
 560  * first string is a sub-string of the second.
 561  *
 562  * This function will be removed in the future through the usual
 563  * deprecation process.
 564  */
 565 int
 566 _substrcmp(const char *str1, const char* str2)
 567 {
 568
 569         if (strncmp(str1, str2, strlen(str1)) != 0)
 570                 return 1;
 571
 572         if (strlen(str1) != strlen(str2))
 573                 warnx("DEPRECATED: '%s' matched '%s' as a sub-string",
 574                     str1, str2);
 575         return 0;
 576 }
 577
 578 /*
 579  * _substrcmp2 takes three strings and returns 1 if the first two do not match,
 580  * and 0 if they match exactly or the second string is a sub-string
 581  * of the first.  A warning is printed to stderr in the case that the
 582  * first string does not match the third.
 583  *
 584  * This function exists to warn about the bizzare construction
 585  * strncmp(str, "by", 2) which is used to allow people to use a shotcut
 586  * for "bytes".  The problem is that in addition to accepting "by",
 587  * "byt", "byte", and "bytes", it also excepts "by_rabid_dogs" and any
 588  * other string beginning with "by".
 589  *
 590  * This function will be removed in the future through the usual
 591  * deprecation process.
 592  */
 593 static int
 594 _substrcmp2(const char *str1, const char* str2, const char* str3)
 595 {
 596
 597         if (strncmp(str1, str2, strlen(str2)) != 0)
 598                 return 1;
 599
 600         if (strcmp(str1, str3) != 0)
 601                 warnx("DEPRECATED: '%s' matched '%s'",
 602                     str1, str3);
 603         return 0;
 604 }
 605
 606 /*
 607  * prints one port, symbolic or numeric
 608  */
 609 static void
 610 print_port(int proto, uint16_t port)
 611 {
 612
 613         if (proto == IPPROTO_ETHERTYPE) {
 614                 char const *s;
 615
 616                 if (co.do_resolv && (s = match_value(ether_types, port)) )
 617                         printf("%s", s);
 618                 else
 619                         printf("0x%04x", port);
 620         } else {
 621                 struct servent *se = NULL;
 622                 if (co.do_resolv) {
 623                         struct protoent *pe = getprotobynumber(proto);
 624
 625                         se = getservbyport(htons(port), pe ? pe->p_name : NULL);
 626                 }
 627                 if (se)
 628                         printf("%s", se->s_name);
 629                 else
 630                         printf("%d", port);
 631         }
 632 }
 633
 634 struct _s_x _port_name[] = {
 635         {"dst-port",    O_IP_DSTPORT},
 636         {"src-port",    O_IP_SRCPORT},
 637         {"ipid",        O_IPID},
 638         {"iplen",       O_IPLEN},
 639         {"ipttl",       O_IPTTL},
 640         {"mac-type",    O_MAC_TYPE},
 641         {"tcpdatalen",  O_TCPDATALEN},
 642         {"tagged",      O_TAGGED},
 643         {NULL,          0}
 644 };
 645
 646 /*
 647  * Print the values in a list 16-bit items of the types above.
 648  * XXX todo: add support for mask.
 649  */
 650 static void
 651 print_newports(ipfw_insn_u16 *cmd, int proto, int opcode)
 652 {
 653         uint16_t *p = cmd->ports;
 654         int i;
 655         char const *sep;
 656
 657         if (opcode != 0) {
 658                 sep = match_value(_port_name, opcode);
 659                 if (sep == NULL)
 660                         sep = "???";
 661                 printf (" %s", sep);
 662         }
 663         sep = " ";
 664         for (i = F_LEN((ipfw_insn *)cmd) - 1; i > 0; i--, p += 2) {
 665                 printf(sep);
 666                 print_port(proto, p[0]);
 667                 if (p[0] != p[1]) {
 668                         printf("-");
 669                         print_port(proto, p[1]);
 670                 }
 671                 sep = ",";
 672         }
 673 }
 674
 675 /*
 676  * Like strtol, but also translates service names into port numbers
 677  * for some protocols.
 678  * In particular:
 679  *      proto == -1 disables the protocol check;
 680  *      proto == IPPROTO_ETHERTYPE looks up an internal table
 681  *      proto == <some value in /etc/protocols> matches the values there.
 682  * Returns *end == s in case the parameter is not found.
 683  */
 684 static int
 685 strtoport(char *s, char **end, int base, int proto)
 686 {
 687         char *p, *buf;
 688         char *s1;
 689         int i;
 690
 691         *end = s;               /* default - not found */
 692         if (*s == '\0')
 693                 return 0;       /* not found */
 694
 695         if (isdigit(*s))
 696                 return strtol(s, end, base);
 697
 698         /*
 699          * find separator. '\\' escapes the next char.
 700          */
 701         for (s1 = s; *s1 && (isalnum(*s1) || *s1 == '\\') ; s1++)
 702                 if (*s1 == '\\' && s1[1] != '\0')
 703                         s1++;
 704
 705         buf = safe_calloc(s1 - s + 1, 1);
 706
 707         /*
 708          * copy into a buffer skipping backslashes
 709          */
 710         for (p = s, i = 0; p != s1 ; p++)
 711                 if (*p != '\\')
 712                         buf[i++] = *p;
 713         buf[i++] = '\0';
 714
 715         if (proto == IPPROTO_ETHERTYPE) {
 716                 i = match_token(ether_types, buf);
 717                 free(buf);
 718                 if (i != -1) {  /* found */
 719                         *end = s1;
 720                         return i;
 721                 }
 722         } else {
 723                 struct protoent *pe = NULL;
 724                 struct servent *se;
 725
 726                 if (proto != 0)
 727                         pe = getprotobynumber(proto);
 728                 setservent(1);
 729                 se = getservbyname(buf, pe ? pe->p_name : NULL);
 730                 free(buf);
 731                 if (se != NULL) {
 732                         *end = s1;
 733                         return ntohs(se->s_port);
 734                 }
 735         }
 736         return 0;       /* not found */
 737 }
 738
 739 /*
 740  * Map between current altq queue id numbers and names.
 741  */
 742 static int altq_fetched = 0;
 743 static TAILQ_HEAD(, pf_altq) altq_entries =
 744         TAILQ_HEAD_INITIALIZER(altq_entries);
 745
 746 static void
 747 altq_set_enabled(int enabled)
 748 {
 749         int pffd;
 750
 751         pffd = open("/dev/pf", O_RDWR);
 752         if (pffd == -1)
 753                 err(EX_UNAVAILABLE,
 754                     "altq support opening pf(4) control device");
 755         if (enabled) {
 756                 if (ioctl(pffd, DIOCSTARTALTQ) != 0 && errno != EEXIST)
 757                         err(EX_UNAVAILABLE, "enabling altq");
 758         } else {
 759                 if (ioctl(pffd, DIOCSTOPALTQ) != 0 && errno != ENOENT)
 760                         err(EX_UNAVAILABLE, "disabling altq");
 761         }
 762         close(pffd);
 763 }
 764
 765 static void
 766 altq_fetch(void)
 767 {
 768         struct pfioc_altq pfioc;
 769         struct pf_altq *altq;
 770         int pffd;
 771         unsigned int mnr;
 772
 773         if (altq_fetched)
 774                 return;
 775         altq_fetched = 1;
 776         pffd = open("/dev/pf", O_RDONLY);
 777         if (pffd == -1) {
 778                 warn("altq support opening pf(4) control device");
 779                 return;
 780         }
 781         bzero(&pfioc, sizeof(pfioc));
 782         if (ioctl(pffd, DIOCGETALTQS, &pfioc) != 0) {
 783                 warn("altq support getting queue list");
 784                 close(pffd);
 785                 return;
 786         }
 787         mnr = pfioc.nr;
 788         for (pfioc.nr = 0; pfioc.nr < mnr; pfioc.nr++) {
 789                 if (ioctl(pffd, DIOCGETALTQ, &pfioc) != 0) {
 790                         if (errno == EBUSY)
 791                                 break;
 792                         warn("altq support getting queue list");
 793                         close(pffd);
 794                         return;
 795                 }
 796                 if (pfioc.altq.qid == 0)
 797                         continue;
 798                 altq = safe_calloc(1, sizeof(*altq));
 799                 *altq = pfioc.altq;
 800                 TAILQ_INSERT_TAIL(&altq_entries, altq, entries);
 801         }
 802         close(pffd);
 803 }
 804
 805 static u_int32_t
 806 altq_name_to_qid(const char *name)
 807 {
 808         struct pf_altq *altq;
 809
 810         altq_fetch();
 811         TAILQ_FOREACH(altq, &altq_entries, entries)
 812                 if (strcmp(name, altq->qname) == 0)
 813                         break;
 814         if (altq == NULL)
 815                 errx(EX_DATAERR, "altq has no queue named `%s'", name);
 816         return altq->qid;
 817 }
 818
 819 static const char *
 820 altq_qid_to_name(u_int32_t qid)
 821 {
 822         struct pf_altq *altq;
 823
 824         altq_fetch();
 825         TAILQ_FOREACH(altq, &altq_entries, entries)
 826                 if (qid == altq->qid)
 827                         break;
 828         if (altq == NULL)
 829                 return NULL;
 830         return altq->qname;
 831 }
 832
 833 static void
 834 fill_altq_qid(u_int32_t *qid, const char *av)
 835 {
 836         *qid = altq_name_to_qid(av);
 837 }
 838
 839 /*
 840  * Fill the body of the command with the list of port ranges.
 841  */
 842 static int
 843 fill_newports(ipfw_insn_u16 *cmd, char *av, int proto)
 844 {
 845         uint16_t a, b, *p = cmd->ports;
 846         int i = 0;
 847         char *s = av;
 848
 849         while (*s) {
 850                 a = strtoport(av, &s, 0, proto);
 851                 if (s == av)                    /* empty or invalid argument */
 852                         return (0);
 853
 854                 switch (*s) {
 855                 case '-':                       /* a range */
 856                         av = s + 1;
 857                         b = strtoport(av, &s, 0, proto);
 858                         /* Reject expressions like '1-abc' or '1-2-3'. */
 859                         if (s == av || (*s != ',' && *s != '\0'))
 860                                 return (0);
 861                         p[0] = a;
 862                         p[1] = b;
 863                         break;
 864                 case ',':                       /* comma separated list */
 865                 case '\0':
 866                         p[0] = p[1] = a;
 867                         break;
 868                 default:
 869                         warnx("port list: invalid separator <%c> in <%s>",
 870                                 *s, av);
 871                         return (0);
 872                 }
 873
 874                 i++;
 875                 p += 2;
 876                 av = s + 1;
 877         }
 878         if (i > 0) {
 879                 if (i + 1 > F_LEN_MASK)
 880                         errx(EX_DATAERR, "too many ports/ranges\n");
 881                 cmd->o.len |= i + 1;    /* leave F_NOT and F_OR untouched */
 882         }
 883         return (i);
 884 }
 885
 886 static struct _s_x icmpcodes[] = {
 887       { "net",                  ICMP_UNREACH_NET },
 888       { "host",                 ICMP_UNREACH_HOST },
 889       { "protocol",             ICMP_UNREACH_PROTOCOL },
 890       { "port",                 ICMP_UNREACH_PORT },
 891       { "needfrag",             ICMP_UNREACH_NEEDFRAG },
 892       { "srcfail",              ICMP_UNREACH_SRCFAIL },
 893       { "net-unknown",          ICMP_UNREACH_NET_UNKNOWN },
 894       { "host-unknown",         ICMP_UNREACH_HOST_UNKNOWN },
 895       { "isolated",             ICMP_UNREACH_ISOLATED },
 896       { "net-prohib",           ICMP_UNREACH_NET_PROHIB },
 897       { "host-prohib",          ICMP_UNREACH_HOST_PROHIB },
 898       { "tosnet",               ICMP_UNREACH_TOSNET },
 899       { "toshost",              ICMP_UNREACH_TOSHOST },
 900       { "filter-prohib",        ICMP_UNREACH_FILTER_PROHIB },
 901       { "host-precedence",      ICMP_UNREACH_HOST_PRECEDENCE },
 902       { "precedence-cutoff",    ICMP_UNREACH_PRECEDENCE_CUTOFF },
 903       { NULL, 0 }
 904 };
 905
 906 static void
 907 fill_reject_code(u_short *codep, char *str)
 908 {
 909         int val;
 910         char *s;
 911
 912         val = strtoul(str, &s, 0);
 913         if (s == str || *s != '\0' || val >= 0x100)
 914                 val = match_token(icmpcodes, str);
 915         if (val < 0)
 916                 errx(EX_DATAERR, "unknown ICMP unreachable code ``%s''", str);
 917         *codep = val;
 918         return;
 919 }
 920
 921 static void
 922 print_reject_code(uint16_t code)
 923 {
 924         char const *s = match_value(icmpcodes, code);
 925
 926         if (s != NULL)
 927                 printf("unreach %s", s);
 928         else
 929                 printf("unreach %u", code);
 930 }
 931
 932 static struct _s_x icmp6codes[] = {
 933       { "no-route",             ICMP6_DST_UNREACH_NOROUTE },
 934       { "admin-prohib",         ICMP6_DST_UNREACH_ADMIN },
 935       { "address",              ICMP6_DST_UNREACH_ADDR },
 936       { "port",                 ICMP6_DST_UNREACH_NOPORT },
 937       { NULL, 0 }
 938 };
 939
 940 static void
 941 fill_unreach6_code(u_short *codep, char *str)
 942 {
 943         int val;
 944         char *s;
 945
 946         val = strtoul(str, &s, 0);
 947         if (s == str || *s != '\0' || val >= 0x100)
 948                 val = match_token(icmp6codes, str);
 949         if (val < 0)
 950                 errx(EX_DATAERR, "unknown ICMPv6 unreachable code ``%s''", str);
 951         *codep = val;
 952         return;
 953 }
 954
 955 static void
 956 print_unreach6_code(uint16_t code)
 957 {
 958         char const *s = match_value(icmp6codes, code);
 959
 960         if (s != NULL)
 961                 printf("unreach6 %s", s);
 962         else
 963                 printf("unreach6 %u", code);
 964 }
 965
 966 /*
 967  * Returns the number of bits set (from left) in a contiguous bitmask,
 968  * or -1 if the mask is not contiguous.
 969  * XXX this needs a proper fix.
 970  * This effectively works on masks in big-endian (network) format.
 971  * when compiled on little endian architectures.
 972  *
 973  * First bit is bit 7 of the first byte -- note, for MAC addresses,
 974  * the first bit on the wire is bit 0 of the first byte.
 975  * len is the max length in bits.
 976  */
 977 static int
 978 contigmask(uint8_t *p, int len)
 979 {
 980         int i, n;
 981
 982         for (i=0; i<len ; i++)
 983                 if ( (p[i/8] & (1 << (7 - (i%8)))) == 0) /* first bit unset */
 984                         break;
 985         for (n=i+1; n < len; n++)
 986                 if ( (p[n/8] & (1 << (7 - (n%8)))) != 0)
 987                         return -1; /* mask not contiguous */
 988         return i;
 989 }
 990
 991 /*
 992  * print flags set/clear in the two bitmasks passed as parameters.
 993  * There is a specialized check for f_tcpflags.
 994  */
 995 static void
 996 print_flags(char const *name, ipfw_insn *cmd, struct _s_x *list)
 997 {
 998         char const *comma = "";
 999         int i;
1000         uint8_t set = cmd->arg1 & 0xff;
1001         uint8_t clear = (cmd->arg1 >> 8) & 0xff;
1002
1003         if (list == f_tcpflags && set == TH_SYN && clear == TH_ACK) {
1004                 printf(" setup");
1005                 return;
1006         }
1007
1008         printf(" %s ", name);
1009         for (i=0; list[i].x != 0; i++) {
1010                 if (set & list[i].x) {
1011                         set &= ~list[i].x;
1012                         printf("%s%s", comma, list[i].s);
1013                         comma = ",";
1014                 }
1015                 if (clear & list[i].x) {
1016                         clear &= ~list[i].x;
1017                         printf("%s!%s", comma, list[i].s);
1018                         comma = ",";
1019                 }
1020         }
1021 }
1022
1023 /*
1024  * Print the ip address contained in a command.
1025  */
1026 static void
1027 print_ip(ipfw_insn_ip *cmd, char const *s)
1028 {
1029         struct hostent *he = NULL;
1030         int len = F_LEN((ipfw_insn *)cmd);
1031         uint32_t *a = ((ipfw_insn_u32 *)cmd)->d;
1032
1033         printf("%s%s ", cmd->o.len & F_NOT ? " not": "", s);
1034
1035         if (cmd->o.opcode == O_IP_SRC_ME || cmd->o.opcode == O_IP_DST_ME) {
1036                 printf("me");
1037                 return;
1038         }
1039         if (cmd->o.opcode == O_IP_SRC_LOOKUP ||
1040             cmd->o.opcode == O_IP_DST_LOOKUP) {
1041                 printf("table(%u", ((ipfw_insn *)cmd)->arg1);
1042                 if (len == F_INSN_SIZE(ipfw_insn_u32))
1043                         printf(",%u", *a);
1044                 printf(")");
1045                 return;
1046         }
1047         if (cmd->o.opcode == O_IP_SRC_SET || cmd->o.opcode == O_IP_DST_SET) {
1048                 uint32_t x, *map = (uint32_t *)&(cmd->mask);
1049                 int i, j;
1050                 char comma = '{';
1051
1052                 x = cmd->o.arg1 - 1;
1053                 x = htonl( ~x );
1054                 cmd->addr.s_addr = htonl(cmd->addr.s_addr);
1055                 printf("%s/%d", inet_ntoa(cmd->addr),
1056                         contigmask((uint8_t *)&x, 32));
1057                 x = cmd->addr.s_addr = htonl(cmd->addr.s_addr);
1058                 x &= 0xff; /* base */
1059                 /*
1060                  * Print bits and ranges.
1061                  * Locate first bit set (i), then locate first bit unset (j).
1062                  * If we have 3+ consecutive bits set, then print them as a
1063                  * range, otherwise only print the initial bit and rescan.
1064                  */
1065                 for (i=0; i < cmd->o.arg1; i++)
1066                         if (map[i/32] & (1<<(i & 31))) {
1067                                 for (j=i+1; j < cmd->o.arg1; j++)
1068                                         if (!(map[ j/32] & (1<<(j & 31))))
1069                                                 break;
1070                                 printf("%c%d", comma, i+x);
1071                                 if (j>i+2) { /* range has at least 3 elements */
1072                                         printf("-%d", j-1+x);
1073                                         i = j-1;
1074                                 }
1075                                 comma = ',';
1076                         }
1077                 printf("}");
1078                 return;
1079         }
1080         /*
1081          * len == 2 indicates a single IP, whereas lists of 1 or more
1082          * addr/mask pairs have len = (2n+1). We convert len to n so we
1083          * use that to count the number of entries.
1084          */
1085     for (len = len / 2; len > 0; len--, a += 2) {
1086         int mb =        /* mask length */
1087             (cmd->o.opcode == O_IP_SRC || cmd->o.opcode == O_IP_DST) ?
1088                 32 : contigmask((uint8_t *)&(a[1]), 32);
1089         if (mb == 32 && co.do_resolv)
1090                 he = gethostbyaddr((char *)&(a[0]), sizeof(u_long), AF_INET);
1091         if (he != NULL)         /* resolved to name */
1092                 printf("%s", he->h_name);
1093         else if (mb == 0)       /* any */
1094                 printf("any");
1095         else {          /* numeric IP followed by some kind of mask */
1096                 printf("%s", inet_ntoa( *((struct in_addr *)&a[0]) ) );
1097                 if (mb < 0)
1098                         printf(":%s", inet_ntoa( *((struct in_addr *)&a[1]) ) );
1099                 else if (mb < 32)
1100                         printf("/%d", mb);
1101         }
1102         if (len > 1)
1103                 printf(",");
1104     }
1105 }
1106
1107 /*
1108  * prints a MAC address/mask pair
1109  */
1110 static void
1111 print_mac(uint8_t *addr, uint8_t *mask)
1112 {
1113         int l = contigmask(mask, 48);
1114
1115         if (l == 0)
1116                 printf(" any");
1117         else {
1118                 printf(" %02x:%02x:%02x:%02x:%02x:%02x",
1119                     addr[0], addr[1], addr[2], addr[3], addr[4], addr[5]);
1120                 if (l == -1)
1121                         printf("&%02x:%02x:%02x:%02x:%02x:%02x",
1122                             mask[0], mask[1], mask[2],
1123                             mask[3], mask[4], mask[5]);
1124                 else if (l < 48)
1125                         printf("/%d", l);
1126         }
1127 }
1128
1129 static void
1130 fill_icmptypes(ipfw_insn_u32 *cmd, char *av)
1131 {
1132         uint8_t type;
1133
1134         cmd->d[0] = 0;
1135         while (*av) {
1136                 if (*av == ',')
1137                         av++;
1138
1139                 type = strtoul(av, &av, 0);
1140
1141                 if (*av != ',' && *av != '\0')
1142                         errx(EX_DATAERR, "invalid ICMP type");
1143
1144                 if (type > 31)
1145                         errx(EX_DATAERR, "ICMP type out of range");
1146
1147                 cmd->d[0] |= 1 << type;
1148         }
1149         cmd->o.opcode = O_ICMPTYPE;
1150         cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32);
1151 }
1152
1153 static void
1154 print_icmptypes(ipfw_insn_u32 *cmd)
1155 {
1156         int i;
1157         char sep= ' ';
1158
1159         printf(" icmptypes");
1160         for (i = 0; i < 32; i++) {
1161                 if ( (cmd->d[0] & (1 << (i))) == 0)
1162                         continue;
1163                 printf("%c%d", sep, i);
1164                 sep = ',';
1165         }
1166 }
1167
1168 /*
1169  * Print the ip address contained in a command.
1170  */
1171 static void
1172 print_ip6(ipfw_insn_ip6 *cmd, char const *s)
1173 {
1174        struct hostent *he = NULL;
1175        int len = F_LEN((ipfw_insn *) cmd) - 1;
1176        struct in6_addr *a = &(cmd->addr6);
1177        char trad[255];
1178
1179        printf("%s%s ", cmd->o.len & F_NOT ? " not": "", s);
1180
1181        if (cmd->o.opcode == O_IP6_SRC_ME || cmd->o.opcode == O_IP6_DST_ME) {
1182                printf("me6");
1183                return;
1184        }
1185        if (cmd->o.opcode == O_IP6) {
1186                printf(" ip6");
1187                return;
1188        }
1189
1190        /*
1191         * len == 4 indicates a single IP, whereas lists of 1 or more
1192         * addr/mask pairs have len = (2n+1). We convert len to n so we
1193         * use that to count the number of entries.
1194         */
1195
1196        for (len = len / 4; len > 0; len -= 2, a += 2) {
1197            int mb =        /* mask length */
1198                (cmd->o.opcode == O_IP6_SRC || cmd->o.opcode == O_IP6_DST) ?
1199                128 : contigmask((uint8_t *)&(a[1]), 128);
1200
1201            if (mb == 128 && co.do_resolv)
1202                he = gethostbyaddr((char *)a, sizeof(*a), AF_INET6);
1203            if (he != NULL)             /* resolved to name */
1204                printf("%s", he->h_name);
1205            else if (mb == 0)           /* any */
1206                printf("any");
1207            else {          /* numeric IP followed by some kind of mask */
1208                if (inet_ntop(AF_INET6,  a, trad, sizeof( trad ) ) == NULL)
1209                    printf("Error ntop in print_ip6\n");
1210                printf("%s",  trad );
1211                if (mb < 0)     /* XXX not really legal... */
1212                    printf(":%s",
1213                        inet_ntop(AF_INET6, &a[1], trad, sizeof(trad)));
1214                else if (mb < 128)
1215                    printf("/%d", mb);
1216            }
1217            if (len > 2)
1218                printf(",");
1219        }
1220 }
1221
1222 static void
1223 fill_icmp6types(ipfw_insn_icmp6 *cmd, char *av)
1224 {
1225        uint8_t type;
1226
1227        bzero(cmd, sizeof(*cmd));
1228        while (*av) {
1229            if (*av == ',')
1230                av++;
1231            type = strtoul(av, &av, 0);
1232            if (*av != ',' && *av != '\0')
1233                errx(EX_DATAERR, "invalid ICMP6 type");
1234            /*
1235             * XXX: shouldn't this be 0xFF?  I can't see any reason why
1236             * we shouldn't be able to filter all possiable values
1237             * regardless of the ability of the rest of the kernel to do
1238             * anything useful with them.
1239             */
1240            if (type > ICMP6_MAXTYPE)
1241                errx(EX_DATAERR, "ICMP6 type out of range");
1242            cmd->d[type / 32] |= ( 1 << (type % 32));
1243        }
1244        cmd->o.opcode = O_ICMP6TYPE;
1245        cmd->o.len |= F_INSN_SIZE(ipfw_insn_icmp6);
1246 }
1247
1248
1249 static void
1250 print_icmp6types(ipfw_insn_u32 *cmd)
1251 {
1252        int i, j;
1253        char sep= ' ';
1254
1255        printf(" ip6 icmp6types");
1256        for (i = 0; i < 7; i++)
1257                for (j=0; j < 32; ++j) {
1258                        if ( (cmd->d[i] & (1 << (j))) == 0)
1259                                continue;
1260                        printf("%c%d", sep, (i*32 + j));
1261                        sep = ',';
1262                }
1263 }
1264
1265 static void
1266 print_flow6id( ipfw_insn_u32 *cmd)
1267 {
1268        uint16_t i, limit = cmd->o.arg1;
1269        char sep = ',';
1270
1271        printf(" flow-id ");
1272        for( i=0; i < limit; ++i) {
1273                if (i == limit - 1)
1274                        sep = ' ';
1275                printf("%d%c", cmd->d[i], sep);
1276        }
1277 }
1278
1279 /* structure and define for the extension header in ipv6 */
1280 static struct _s_x ext6hdrcodes[] = {
1281        { "frag",       EXT_FRAGMENT },
1282        { "hopopt",     EXT_HOPOPTS },
1283        { "route",      EXT_ROUTING },
1284        { "dstopt",     EXT_DSTOPTS },
1285        { "ah",         EXT_AH },
1286        { "esp",        EXT_ESP },
1287        { "rthdr0",     EXT_RTHDR0 },
1288        { "rthdr2",     EXT_RTHDR2 },
1289        { NULL,         0 }
1290 };
1291
1292 /* fills command for the extension header filtering */
1293 static int
1294 fill_ext6hdr( ipfw_insn *cmd, char *av)
1295 {
1296        int tok;
1297        char *s = av;
1298
1299        cmd->arg1 = 0;
1300
1301        while(s) {
1302            av = strsep( &s, ",") ;
1303            tok = match_token(ext6hdrcodes, av);
1304            switch (tok) {
1305            case EXT_FRAGMENT:
1306                cmd->arg1 |= EXT_FRAGMENT;
1307                break;
1308
1309            case EXT_HOPOPTS:
1310                cmd->arg1 |= EXT_HOPOPTS;
1311                break;
1312
1313            case EXT_ROUTING:
1314                cmd->arg1 |= EXT_ROUTING;
1315                break;
1316
1317            case EXT_DSTOPTS:
1318                cmd->arg1 |= EXT_DSTOPTS;
1319                break;
1320
1321            case EXT_AH:
1322                cmd->arg1 |= EXT_AH;
1323                break;
1324
1325            case EXT_ESP:
1326                cmd->arg1 |= EXT_ESP;
1327                break;
1328
1329            case EXT_RTHDR0:
1330                cmd->arg1 |= EXT_RTHDR0;
1331                break;
1332
1333            case EXT_RTHDR2:
1334                cmd->arg1 |= EXT_RTHDR2;
1335                break;
1336
1337            default:
1338                errx( EX_DATAERR, "invalid option for ipv6 exten header" );
1339                break;
1340            }
1341        }
1342        if (cmd->arg1 == 0 )
1343            return 0;
1344        cmd->opcode = O_EXT_HDR;
1345        cmd->len |= F_INSN_SIZE( ipfw_insn );
1346        return 1;
1347 }
1348
1349 static void
1350 print_ext6hdr( ipfw_insn *cmd )
1351 {
1352        char sep = ' ';
1353
1354        printf(" extension header:");
1355        if (cmd->arg1 & EXT_FRAGMENT ) {
1356            printf("%cfragmentation", sep);
1357            sep = ',';
1358        }
1359        if (cmd->arg1 & EXT_HOPOPTS ) {
1360            printf("%chop options", sep);
1361            sep = ',';
1362        }
1363        if (cmd->arg1 & EXT_ROUTING ) {
1364            printf("%crouting options", sep);
1365            sep = ',';
1366        }
1367        if (cmd->arg1 & EXT_RTHDR0 ) {
1368            printf("%crthdr0", sep);
1369            sep = ',';
1370        }
1371        if (cmd->arg1 & EXT_RTHDR2 ) {
1372            printf("%crthdr2", sep);
1373            sep = ',';
1374        }
1375        if (cmd->arg1 & EXT_DSTOPTS ) {
1376            printf("%cdestination options", sep);
1377            sep = ',';
1378        }
1379        if (cmd->arg1 & EXT_AH ) {
1380            printf("%cauthentication header", sep);
1381            sep = ',';
1382        }
1383        if (cmd->arg1 & EXT_ESP ) {
1384            printf("%cencapsulated security payload", sep);
1385        }
1386 }
1387
1388 /*
1389  * show_ipfw() prints the body of an ipfw rule.
1390  * Because the standard rule has at least proto src_ip dst_ip, we use
1391  * a helper function to produce these entries if not provided explicitly.
1392  * The first argument is the list of fields we have, the second is
1393  * the list of fields we want to be printed.
1394  *
1395  * Special cases if we have provided a MAC header:
1396  *   + if the rule does not contain IP addresses/ports, do not print them;
1397  *   + if the rule does not contain an IP proto, print "all" instead of "ip";
1398  *
1399  * Once we have 'have_options', IP header fields are printed as options.
1400  */
1401 #define HAVE_PROTO      0x0001
1402 #define HAVE_SRCIP      0x0002
1403 #define HAVE_DSTIP      0x0004
1404 #define HAVE_PROTO4     0x0008
1405 #define HAVE_PROTO6     0x0010
1406 #define HAVE_OPTIONS    0x8000
1407
1408 #define HAVE_IP         (HAVE_PROTO | HAVE_SRCIP | HAVE_DSTIP)
1409 static void
1410 show_prerequisites(int *flags, int want, int cmd __unused)
1411 {
1412         if (co.comment_only)
1413                 return;
1414         if ( (*flags & HAVE_IP) == HAVE_IP)
1415                 *flags |= HAVE_OPTIONS;
1416
1417         if ( !(*flags & HAVE_OPTIONS)) {
1418                 if ( !(*flags & HAVE_PROTO) && (want & HAVE_PROTO)) {
1419                         if ( (*flags & HAVE_PROTO4))
1420                                 printf(" ip4");
1421                         else if ( (*flags & HAVE_PROTO6))
1422                                 printf(" ip6");
1423                         else
1424                                 printf(" ip");
1425                 }
1426                 if ( !(*flags & HAVE_SRCIP) && (want & HAVE_SRCIP))
1427                         printf(" from any");
1428                 if ( !(*flags & HAVE_DSTIP) && (want & HAVE_DSTIP))
1429                         printf(" to any");
1430         }
1431         *flags |= want;
1432 }
1433
1434 static void
1435 show_ipfw(struct ip_fw *rule, int pcwidth, int bcwidth)
1436 {
1437         static int twidth = 0;
1438         int l;
1439         ipfw_insn *cmd, *tagptr = NULL;
1440         const char *comment = NULL;     /* ptr to comment if we have one */
1441         int proto = 0;          /* default */
1442         int flags = 0;  /* prerequisites */
1443         ipfw_insn_log *logptr = NULL; /* set if we find an O_LOG */
1444         ipfw_insn_altq *altqptr = NULL; /* set if we find an O_ALTQ */
1445         int or_block = 0;       /* we are in an or block */
1446         uint32_t set_disable;
1447
1448         bcopy(&rule->next_rule, &set_disable, sizeof(set_disable));
1449
1450         if (set_disable & (1 << rule->set)) { /* disabled */
1451                 if (!co.show_sets)
1452                         return;
1453                 else
1454                         printf("# DISABLED ");
1455         }
1456         printf("%05u ", rule->rulenum);
1457
1458         if (pcwidth>0 || bcwidth>0)
1459                 printf("%*llu %*llu ", pcwidth, align_uint64(&rule->pcnt),
1460                     bcwidth, align_uint64(&rule->bcnt));
1461
1462         if (co.do_time == 2)
1463                 printf("%10u ", rule->timestamp);
1464         else if (co.do_time == 1) {
1465                 char timestr[30];
1466                 time_t t = (time_t)0;
1467
1468                 if (twidth == 0) {
1469                         strcpy(timestr, ctime(&t));
1470                         *strchr(timestr, '\n') = '\0';
1471                         twidth = strlen(timestr);
1472                 }
1473                 if (rule->timestamp) {
1474                         t = _long_to_time(rule->timestamp);
1475
1476                         strcpy(timestr, ctime(&t));
1477                         *strchr(timestr, '\n') = '\0';
1478                         printf("%s ", timestr);
1479                 } else {
1480                         printf("%*s", twidth, " ");
1481                 }
1482         }
1483
1484         if (co.show_sets)
1485                 printf("set %d ", rule->set);
1486
1487         /*
1488          * print the optional "match probability"
1489          */
1490         if (rule->cmd_len > 0) {
1491                 cmd = rule->cmd ;
1492                 if (cmd->opcode == O_PROB) {
1493                         ipfw_insn_u32 *p = (ipfw_insn_u32 *)cmd;
1494                         double d = 1.0 * p->d[0];
1495
1496                         d = (d / 0x7fffffff);
1497                         printf("prob %f ", d);
1498                 }
1499         }
1500
1501         /*
1502          * first print actions
1503          */
1504         for (l = rule->cmd_len - rule->act_ofs, cmd = ACTION_PTR(rule);
1505                         l > 0 ; l -= F_LEN(cmd), cmd += F_LEN(cmd)) {
1506                 switch(cmd->opcode) {
1507                 case O_CHECK_STATE:
1508                         printf("check-state");
1509                         flags = HAVE_IP; /* avoid printing anything else */
1510                         break;
1511
1512                 case O_ACCEPT:
1513                         printf("allow");
1514                         break;
1515
1516                 case O_COUNT:
1517                         printf("count");
1518                         break;
1519
1520                 case O_DENY:
1521                         printf("deny");
1522                         break;
1523
1524                 case O_REJECT:
1525                         if (cmd->arg1 == ICMP_REJECT_RST)
1526                                 printf("reset");
1527                         else if (cmd->arg1 == ICMP_UNREACH_HOST)
1528                                 printf("reject");
1529                         else
1530                                 print_reject_code(cmd->arg1);
1531                         break;
1532
1533                 case O_UNREACH6:
1534                         if (cmd->arg1 == ICMP6_UNREACH_RST)
1535                                 printf("reset6");
1536                         else
1537                                 print_unreach6_code(cmd->arg1);
1538                         break;
1539
1540                 case O_SKIPTO:
1541                         PRINT_UINT_ARG("skipto ", cmd->arg1);
1542                         break;
1543
1544                 case O_PIPE:
1545                         PRINT_UINT_ARG("pipe ", cmd->arg1);
1546                         break;
1547
1548                 case O_QUEUE:
1549                         PRINT_UINT_ARG("queue ", cmd->arg1);
1550                         break;
1551
1552                 case O_DIVERT:
1553                         PRINT_UINT_ARG("divert ", cmd->arg1);
1554                         break;
1555
1556                 case O_TEE:
1557                         PRINT_UINT_ARG("tee ", cmd->arg1);
1558                         break;
1559
1560                 case O_NETGRAPH:
1561                         PRINT_UINT_ARG("netgraph ", cmd->arg1);
1562                         break;
1563
1564                 case O_NGTEE:
1565                         PRINT_UINT_ARG("ngtee ", cmd->arg1);
1566                         break;
1567
1568                 case O_FORWARD_IP:
1569                     {
1570                         ipfw_insn_sa *s = (ipfw_insn_sa *)cmd;
1571
1572                         if (s->sa.sin_addr.s_addr == INADDR_ANY) {
1573                                 printf("fwd tablearg");
1574                         } else {
1575                                 printf("fwd %s", inet_ntoa(s->sa.sin_addr));
1576                         }
1577                         if (s->sa.sin_port)
1578                                 printf(",%d", s->sa.sin_port);
1579                     }
1580                         break;
1581
1582                 case O_LOG: /* O_LOG is printed last */
1583                         logptr = (ipfw_insn_log *)cmd;
1584                         break;
1585
1586                 case O_ALTQ: /* O_ALTQ is printed after O_LOG */
1587                         altqptr = (ipfw_insn_altq *)cmd;
1588                         break;
1589
1590                 case O_TAG:
1591                         tagptr = cmd;
1592                         break;
1593
1594                 case O_NAT:
1595                         PRINT_UINT_ARG("nat ", cmd->arg1);
1596                         break;
1597
1598                 case O_SETFIB:
1599                         PRINT_UINT_ARG("setfib ", cmd->arg1);
1600                         break;
1601
1602                 default:
1603                         printf("** unrecognized action %d len %d ",
1604                                 cmd->opcode, cmd->len);
1605                 }
1606         }
1607         if (logptr) {
1608                 if (logptr->max_log > 0)
1609                         printf(" log logamount %d", logptr->max_log);
1610                 else
1611                         printf(" log");
1612         }
1613         if (altqptr) {
1614                 const char *qname;
1615
1616                 qname = altq_qid_to_name(altqptr->qid);
1617                 if (qname == NULL)
1618                         printf(" altq ?<%u>", altqptr->qid);
1619                 else
1620                         printf(" altq %s", qname);
1621         }
1622         if (tagptr) {
1623                 if (tagptr->len & F_NOT)
1624                         PRINT_UINT_ARG(" untag ", tagptr->arg1);
1625                 else
1626                         PRINT_UINT_ARG(" tag ", tagptr->arg1);
1627         }
1628
1629         /*
1630          * then print the body.
1631          */
1632         for (l = rule->act_ofs, cmd = rule->cmd ;
1633                         l > 0 ; l -= F_LEN(cmd) , cmd += F_LEN(cmd)) {
1634                 if ((cmd->len & F_OR) || (cmd->len & F_NOT))
1635                         continue;
1636                 if (cmd->opcode == O_IP4) {
1637                         flags |= HAVE_PROTO4;
1638                         break;
1639                 } else if (cmd->opcode == O_IP6) {
1640                         flags |= HAVE_PROTO6;
1641                         break;
1642                 }
1643         }
1644         if (rule->_pad & 1) {   /* empty rules before options */
1645                 if (!co.do_compact) {
1646                         show_prerequisites(&flags, HAVE_PROTO, 0);
1647                         printf(" from any to any");
1648                 }
1649                 flags |= HAVE_IP | HAVE_OPTIONS;
1650         }
1651
1652         if (co.comment_only)
1653                 comment = "...";
1654
1655         for (l = rule->act_ofs, cmd = rule->cmd ;
1656                         l > 0 ; l -= F_LEN(cmd) , cmd += F_LEN(cmd)) {
1657                 /* useful alias */
1658                 ipfw_insn_u32 *cmd32 = (ipfw_insn_u32 *)cmd;
1659
1660                 if (co.comment_only) {
1661                         if (cmd->opcode != O_NOP)
1662                                 continue;
1663                         printf(" // %s\n", (char *)(cmd + 1));
1664                         return;
1665                 }
1666
1667                 show_prerequisites(&flags, 0, cmd->opcode);
1668
1669                 switch(cmd->opcode) {
1670                 case O_PROB:
1671                         break;  /* done already */
1672
1673                 case O_PROBE_STATE:
1674                         break; /* no need to print anything here */
1675
1676                 case O_IP_SRC:
1677                 case O_IP_SRC_LOOKUP:
1678                 case O_IP_SRC_MASK:
1679                 case O_IP_SRC_ME:
1680                 case O_IP_SRC_SET:
1681                         show_prerequisites(&flags, HAVE_PROTO, 0);
1682                         if (!(flags & HAVE_SRCIP))
1683                                 printf(" from");
1684                         if ((cmd->len & F_OR) && !or_block)
1685                                 printf(" {");
1686                         print_ip((ipfw_insn_ip *)cmd,
1687                                 (flags & HAVE_OPTIONS) ? " src-ip" : "");
1688                         flags |= HAVE_SRCIP;
1689                         break;
1690
1691                 case O_IP_DST:
1692                 case O_IP_DST_LOOKUP:
1693                 case O_IP_DST_MASK:
1694                 case O_IP_DST_ME:
1695                 case O_IP_DST_SET:
1696                         show_prerequisites(&flags, HAVE_PROTO|HAVE_SRCIP, 0);
1697                         if (!(flags & HAVE_DSTIP))
1698                                 printf(" to");
1699                         if ((cmd->len & F_OR) && !or_block)
1700                                 printf(" {");
1701                         print_ip((ipfw_insn_ip *)cmd,
1702                                 (flags & HAVE_OPTIONS) ? " dst-ip" : "");
1703                         flags |= HAVE_DSTIP;
1704                         break;
1705
1706                 case O_IP6_SRC:
1707                 case O_IP6_SRC_MASK:
1708                 case O_IP6_SRC_ME:
1709                         show_prerequisites(&flags, HAVE_PROTO, 0);
1710                         if (!(flags & HAVE_SRCIP))
1711                                 printf(" from");
1712                         if ((cmd->len & F_OR) && !or_block)
1713                                 printf(" {");
1714                         print_ip6((ipfw_insn_ip6 *)cmd,
1715                             (flags & HAVE_OPTIONS) ? " src-ip6" : "");
1716                         flags |= HAVE_SRCIP | HAVE_PROTO;
1717                         break;
1718
1719                 case O_IP6_DST:
1720                 case O_IP6_DST_MASK:
1721                 case O_IP6_DST_ME:
1722                         show_prerequisites(&flags, HAVE_PROTO|HAVE_SRCIP, 0);
1723                         if (!(flags & HAVE_DSTIP))
1724                                 printf(" to");
1725                         if ((cmd->len & F_OR) && !or_block)
1726                                 printf(" {");
1727                         print_ip6((ipfw_insn_ip6 *)cmd,
1728                             (flags & HAVE_OPTIONS) ? " dst-ip6" : "");
1729                         flags |= HAVE_DSTIP;
1730                         break;
1731
1732                 case O_FLOW6ID:
1733                 print_flow6id( (ipfw_insn_u32 *) cmd );
1734                 flags |= HAVE_OPTIONS;
1735                 break;
1736
1737                 case O_IP_DSTPORT:
1738                         show_prerequisites(&flags, HAVE_IP, 0);
1739                 case O_IP_SRCPORT:
1740                         show_prerequisites(&flags, HAVE_PROTO|HAVE_SRCIP, 0);
1741                         if ((cmd->len & F_OR) && !or_block)
1742                                 printf(" {");
1743                         if (cmd->len & F_NOT)
1744                                 printf(" not");
1745                         print_newports((ipfw_insn_u16 *)cmd, proto,
1746                                 (flags & HAVE_OPTIONS) ? cmd->opcode : 0);
1747                         break;
1748
1749                 case O_PROTO: {
1750                         struct protoent *pe = NULL;
1751
1752                         if ((cmd->len & F_OR) && !or_block)
1753                                 printf(" {");
1754                         if (cmd->len & F_NOT)
1755                                 printf(" not");
1756                         proto = cmd->arg1;
1757                         pe = getprotobynumber(cmd->arg1);
1758                         if ((flags & (HAVE_PROTO4 | HAVE_PROTO6)) &&
1759                             !(flags & HAVE_PROTO))
1760                                 show_prerequisites(&flags,
1761                                     HAVE_IP | HAVE_OPTIONS, 0);
1762                         if (flags & HAVE_OPTIONS)
1763                                 printf(" proto");
1764                         if (pe)
1765                                 printf(" %s", pe->p_name);
1766                         else
1767                                 printf(" %u", cmd->arg1);
1768                         }
1769                         flags |= HAVE_PROTO;
1770                         break;
1771
1772                 default: /*options ... */
1773                         if (!(cmd->len & (F_OR|F_NOT)))
1774                                 if (((cmd->opcode == O_IP6) &&
1775                                     (flags & HAVE_PROTO6)) ||
1776                                     ((cmd->opcode == O_IP4) &&
1777                                     (flags & HAVE_PROTO4)))
1778                                         break;
1779                         show_prerequisites(&flags, HAVE_IP | HAVE_OPTIONS, 0);
1780                         if ((cmd->len & F_OR) && !or_block)
1781                                 printf(" {");
1782                         if (cmd->len & F_NOT && cmd->opcode != O_IN)
1783                                 printf(" not");
1784                         switch(cmd->opcode) {
1785                         case O_MACADDR2: {
1786                                 ipfw_insn_mac *m = (ipfw_insn_mac *)cmd;
1787
1788                                 printf(" MAC");
1789                                 print_mac(m->addr, m->mask);
1790                                 print_mac(m->addr + 6, m->mask + 6);
1791                                 }
1792                                 break;
1793
1794                         case O_MAC_TYPE:
1795                                 print_newports((ipfw_insn_u16 *)cmd,
1796                                                 IPPROTO_ETHERTYPE, cmd->opcode);
1797                                 break;
1798
1799
1800                         case O_FRAG:
1801                                 printf(" frag");
1802                                 break;
1803
1804                         case O_FIB:
1805                                 printf(" fib %u", cmd->arg1 );
1806                                 break;
1807
1808                         case O_IN:
1809                                 printf(cmd->len & F_NOT ? " out" : " in");
1810                                 break;
1811
1812                         case O_DIVERTED:
1813                                 switch (cmd->arg1) {
1814                                 case 3:
1815                                         printf(" diverted");
1816                                         break;
1817                                 case 1:
1818                                         printf(" diverted-loopback");
1819                                         break;
1820                                 case 2:
1821                                         printf(" diverted-output");
1822                                         break;
1823                                 default:
1824                                         printf(" diverted-?<%u>", cmd->arg1);
1825                                         break;
1826                                 }
1827                                 break;
1828
1829                         case O_LAYER2:
1830                                 printf(" layer2");
1831                                 break;
1832                         case O_XMIT:
1833                         case O_RECV:
1834                         case O_VIA:
1835                             {
1836                                 char const *s;
1837                                 ipfw_insn_if *cmdif = (ipfw_insn_if *)cmd;
1838
1839                                 if (cmd->opcode == O_XMIT)
1840                                         s = "xmit";
1841                                 else if (cmd->opcode == O_RECV)
1842                                         s = "recv";
1843                                 else /* if (cmd->opcode == O_VIA) */
1844                                         s = "via";
1845                                 if (cmdif->name[0] == '\0')
1846                                         printf(" %s %s", s,
1847                                             inet_ntoa(cmdif->p.ip));
1848                                 else
1849                                         printf(" %s %s", s, cmdif->name);
1850
1851                                 break;
1852                             }
1853                         case O_IPID:
1854                                 if (F_LEN(cmd) == 1)
1855                                     printf(" ipid %u", cmd->arg1 );
1856                                 else
1857                                     print_newports((ipfw_insn_u16 *)cmd, 0,
1858                                         O_IPID);
1859                                 break;
1860
1861                         case O_IPTTL:
1862                                 if (F_LEN(cmd) == 1)
1863                                     printf(" ipttl %u", cmd->arg1 );
1864                                 else
1865                                     print_newports((ipfw_insn_u16 *)cmd, 0,
1866                                         O_IPTTL);
1867                                 break;
1868
1869                         case O_IPVER:
1870                                 printf(" ipver %u", cmd->arg1 );
1871                                 break;
1872
1873                         case O_IPPRECEDENCE:
1874                                 printf(" ipprecedence %u", (cmd->arg1) >> 5 );
1875                                 break;
1876
1877                         case O_IPLEN:
1878                                 if (F_LEN(cmd) == 1)
1879                                     printf(" iplen %u", cmd->arg1 );
1880                                 else
1881                                     print_newports((ipfw_insn_u16 *)cmd, 0,
1882                                         O_IPLEN);
1883                                 break;
1884
1885                         case O_IPOPT:
1886                                 print_flags("ipoptions", cmd, f_ipopts);
1887                                 break;
1888
1889                         case O_IPTOS:
1890                                 print_flags("iptos", cmd, f_iptos);
1891                                 break;
1892
1893                         case O_ICMPTYPE:
1894                                 print_icmptypes((ipfw_insn_u32 *)cmd);
1895                                 break;
1896
1897                         case O_ESTAB:
1898                                 printf(" established");
1899                                 break;
1900
1901                         case O_TCPDATALEN:
1902                                 if (F_LEN(cmd) == 1)
1903                                     printf(" tcpdatalen %u", cmd->arg1 );
1904                                 else
1905                                     print_newports((ipfw_insn_u16 *)cmd, 0,
1906                                         O_TCPDATALEN);
1907                                 break;
1908
1909                         case O_TCPFLAGS:
1910                                 print_flags("tcpflags", cmd, f_tcpflags);
1911                                 break;
1912
1913                         case O_TCPOPTS:
1914                                 print_flags("tcpoptions", cmd, f_tcpopts);
1915                                 break;
1916
1917                         case O_TCPWIN:
1918                                 printf(" tcpwin %d", ntohs(cmd->arg1));
1919                                 break;
1920
1921                         case O_TCPACK:
1922                                 printf(" tcpack %d", ntohl(cmd32->d[0]));
1923                                 break;
1924
1925                         case O_TCPSEQ:
1926                                 printf(" tcpseq %d", ntohl(cmd32->d[0]));
1927                                 break;
1928
1929                         case O_UID:
1930                             {
1931                                 struct passwd *pwd = getpwuid(cmd32->d[0]);
1932
1933                                 if (pwd)
1934                                         printf(" uid %s", pwd->pw_name);
1935                                 else
1936                                         printf(" uid %u", cmd32->d[0]);
1937                             }
1938                                 break;
1939
1940                         case O_GID:
1941                             {
1942                                 struct group *grp = getgrgid(cmd32->d[0]);
1943
1944                                 if (grp)
1945                                         printf(" gid %s", grp->gr_name);
1946                                 else
1947                                         printf(" gid %u", cmd32->d[0]);
1948                             }
1949                                 break;
1950
1951                         case O_JAIL:
1952                                 printf(" jail %d", cmd32->d[0]);
1953                                 break;
1954
1955                         case O_VERREVPATH:
1956                                 printf(" verrevpath");
1957                                 break;
1958
1959                         case O_VERSRCREACH:
1960                                 printf(" versrcreach");
1961                                 break;
1962
1963                         case O_ANTISPOOF:
1964                                 printf(" antispoof");
1965                                 break;
1966
1967                         case O_IPSEC:
1968                                 printf(" ipsec");
1969                                 break;
1970
1971                         case O_NOP:
1972                                 comment = (char *)(cmd + 1);
1973                                 break;
1974
1975                         case O_KEEP_STATE:
1976                                 printf(" keep-state");
1977                                 break;
1978
1979                         case O_LIMIT: {
1980                                 struct _s_x *p = limit_masks;
1981                                 ipfw_insn_limit *c = (ipfw_insn_limit *)cmd;
1982                                 uint8_t x = c->limit_mask;
1983                                 char const *comma = " ";
1984
1985                                 printf(" limit");
1986                                 for (; p->x != 0 ; p++)
1987                                         if ((x & p->x) == p->x) {
1988                                                 x &= ~p->x;
1989                                                 printf("%s%s", comma, p->s);
1990                                                 comma = ",";
1991                                         }
1992                                 PRINT_UINT_ARG(" ", c->conn_limit);
1993                                 break;
1994                         }
1995
1996                         case O_IP6:
1997                                 printf(" ip6");
1998                                 break;
1999
2000                         case O_IP4:
2001                                 printf(" ip4");
2002                                 break;
2003
2004                         case O_ICMP6TYPE:
2005                                 print_icmp6types((ipfw_insn_u32 *)cmd);
2006                                 break;
2007
2008                         case O_EXT_HDR:
2009                                 print_ext6hdr( (ipfw_insn *) cmd );
2010                                 break;
2011
2012                         case O_TAGGED:
2013                                 if (F_LEN(cmd) == 1)
2014                                         PRINT_UINT_ARG(" tagged ", cmd->arg1);
2015                                 else
2016                                         print_newports((ipfw_insn_u16 *)cmd, 0,
2017                                             O_TAGGED);
2018                                 break;
2019
2020                         default:
2021                                 printf(" [opcode %d len %d]",
2022                                     cmd->opcode, cmd->len);
2023                         }
2024                 }
2025                 if (cmd->len & F_OR) {
2026                         printf(" or");
2027                         or_block = 1;
2028                 } else if (or_block) {
2029                         printf(" }");
2030                         or_block = 0;
2031                 }
2032         }
2033         show_prerequisites(&flags, HAVE_IP, 0);
2034         if (comment)
2035                 printf(" // %s", comment);
2036         printf("\n");
2037 }
2038
2039 static void
2040 show_dyn_ipfw(ipfw_dyn_rule *d, int pcwidth, int bcwidth)
2041 {
2042         struct protoent *pe;
2043         struct in_addr a;
2044         uint16_t rulenum;
2045         char buf[INET6_ADDRSTRLEN];
2046
2047         if (!co.do_expired) {
2048                 if (!d->expire && !(d->dyn_type == O_LIMIT_PARENT))
2049                         return;
2050         }
2051         bcopy(&d->rule, &rulenum, sizeof(rulenum));
2052         printf("%05d", rulenum);
2053         if (pcwidth>0 || bcwidth>0)
2054             printf(" %*llu %*llu (%ds)", pcwidth,
2055                 align_uint64(&d->pcnt), bcwidth,
2056                 align_uint64(&d->bcnt), d->expire);
2057         switch (d->dyn_type) {
2058         case O_LIMIT_PARENT:
2059                 printf(" PARENT %d", d->count);
2060                 break;
2061         case O_LIMIT:
2062                 printf(" LIMIT");
2063                 break;
2064         case O_KEEP_STATE: /* bidir, no mask */
2065                 printf(" STATE");
2066                 break;
2067         }
2068
2069         if ((pe = getprotobynumber(d->id.proto)) != NULL)
2070                 printf(" %s", pe->p_name);
2071         else
2072                 printf(" proto %u", d->id.proto);
2073
2074         if (d->id.addr_type == 4) {
2075                 a.s_addr = htonl(d->id.src_ip);
2076                 printf(" %s %d", inet_ntoa(a), d->id.src_port);
2077
2078                 a.s_addr = htonl(d->id.dst_ip);
2079                 printf(" <-> %s %d", inet_ntoa(a), d->id.dst_port);
2080         } else if (d->id.addr_type == 6) {
2081                 printf(" %s %d", inet_ntop(AF_INET6, &d->id.src_ip6, buf,
2082                     sizeof(buf)), d->id.src_port);
2083                 printf(" <-> %s %d", inet_ntop(AF_INET6, &d->id.dst_ip6, buf,
2084                     sizeof(buf)), d->id.dst_port);
2085         } else
2086                 printf(" UNKNOWN <-> UNKNOWN\n");
2087
2088         printf("\n");
2089 }
2090
2091 static int
2092 sort_q(const void *pa, const void *pb)
2093 {
2094         int rev = (co.do_sort < 0);
2095         int field = rev ? -co.do_sort : co.do_sort;
2096         long long res = 0;
2097         const struct dn_flow_queue *a = pa;
2098         const struct dn_flow_queue *b = pb;
2099
2100         switch (field) {
2101         case 1: /* pkts */
2102                 res = a->len - b->len;
2103                 break;
2104         case 2: /* bytes */
2105                 res = a->len_bytes - b->len_bytes;
2106                 break;
2107
2108         case 3: /* tot pkts */
2109                 res = a->tot_pkts - b->tot_pkts;
2110                 break;
2111
2112         case 4: /* tot bytes */
2113                 res = a->tot_bytes - b->tot_bytes;
2114                 break;
2115         }
2116         if (res < 0)
2117                 res = -1;
2118         if (res > 0)
2119                 res = 1;
2120         return (int)(rev ? res : -res);
2121 }
2122
2123 static void
2124 list_queues(struct dn_flow_set *fs, struct dn_flow_queue *q)
2125 {
2126         int l;
2127         int index_printed, indexes = 0;
2128         char buff[255];
2129         struct protoent *pe;
2130
2131         if (fs->rq_elements == 0)
2132                 return;
2133
2134         if (co.do_sort != 0)
2135                 heapsort(q, fs->rq_elements, sizeof *q, sort_q);
2136
2137         /* Print IPv4 flows */
2138         index_printed = 0;
2139         for (l = 0; l < fs->rq_elements; l++) {
2140                 struct in_addr ina;
2141
2142                 /* XXX: Should check for IPv4 flows */
2143                 if (IS_IP6_FLOW_ID(&(q[l].id)))
2144                         continue;
2145
2146                 if (!index_printed) {
2147                         index_printed = 1;
2148                         if (indexes > 0)        /* currently a no-op */
2149                                 printf("\n");
2150                         indexes++;
2151                         printf("    "
2152                             "mask: 0x%02x 0x%08x/0x%04x -> 0x%08x/0x%04x\n",
2153                             fs->flow_mask.proto,
2154                             fs->flow_mask.src_ip, fs->flow_mask.src_port,
2155                             fs->flow_mask.dst_ip, fs->flow_mask.dst_port);
2156
2157                         printf("BKT Prot ___Source IP/port____ "
2158                             "____Dest. IP/port____ "
2159                             "Tot_pkt/bytes Pkt/Byte Drp\n");
2160                 }
2161
2162                 printf("%3d ", q[l].hash_slot);
2163                 pe = getprotobynumber(q[l].id.proto);
2164                 if (pe)
2165                         printf("%-4s ", pe->p_name);
2166                 else
2167                         printf("%4u ", q[l].id.proto);
2168                 ina.s_addr = htonl(q[l].id.src_ip);
2169                 printf("%15s/%-5d ",
2170                     inet_ntoa(ina), q[l].id.src_port);
2171                 ina.s_addr = htonl(q[l].id.dst_ip);
2172                 printf("%15s/%-5d ",
2173                     inet_ntoa(ina), q[l].id.dst_port);
2174                 printf("%4qu %8qu %2u %4u %3u\n",
2175                     q[l].tot_pkts, q[l].tot_bytes,
2176                     q[l].len, q[l].len_bytes, q[l].drops);
2177                 if (co.verbose)
2178                         printf("   S %20qd  F %20qd\n",
2179                             q[l].S, q[l].F);
2180         }
2181
2182         /* Print IPv6 flows */
2183         index_printed = 0;
2184         for (l = 0; l < fs->rq_elements; l++) {
2185                 if (!IS_IP6_FLOW_ID(&(q[l].id)))
2186                         continue;
2187
2188                 if (!index_printed) {
2189                         index_printed = 1;
2190                         if (indexes > 0)
2191                                 printf("\n");
2192                         indexes++;
2193                         printf("\n        mask: proto: 0x%02x, flow_id: 0x%08x,  ",
2194                             fs->flow_mask.proto, fs->flow_mask.flow_id6);
2195                         inet_ntop(AF_INET6, &(fs->flow_mask.src_ip6),
2196                             buff, sizeof(buff));
2197                         printf("%s/0x%04x -> ", buff, fs->flow_mask.src_port);
2198                         inet_ntop( AF_INET6, &(fs->flow_mask.dst_ip6),
2199                             buff, sizeof(buff) );
2200                         printf("%s/0x%04x\n", buff, fs->flow_mask.dst_port);
2201
2202                         printf("BKT ___Prot___ _flow-id_ "
2203                             "______________Source IPv6/port_______________ "
2204                             "_______________Dest. IPv6/port_______________ "
2205                             "Tot_pkt/bytes Pkt/Byte Drp\n");
2206                 }
2207                 printf("%3d ", q[l].hash_slot);
2208                 pe = getprotobynumber(q[l].id.proto);
2209                 if (pe != NULL)
2210                         printf("%9s ", pe->p_name);
2211                 else
2212                         printf("%9u ", q[l].id.proto);
2213                 printf("%7d  %39s/%-5d ", q[l].id.flow_id6,
2214                     inet_ntop(AF_INET6, &(q[l].id.src_ip6), buff, sizeof(buff)),
2215                     q[l].id.src_port);
2216                 printf(" %39s/%-5d ",
2217                     inet_ntop(AF_INET6, &(q[l].id.dst_ip6), buff, sizeof(buff)),
2218                     q[l].id.dst_port);
2219                 printf(" %4qu %8qu %2u %4u %3u\n",
2220                     q[l].tot_pkts, q[l].tot_bytes,
2221                     q[l].len, q[l].len_bytes, q[l].drops);
2222                 if (co.verbose)
2223                         printf("   S %20qd  F %20qd\n", q[l].S, q[l].F);
2224         }
2225 }
2226
2227 static void
2228 print_flowset_parms(struct dn_flow_set *fs, char *prefix)
2229 {
2230         int l;
2231         char qs[30];
2232         char plr[30];
2233         char red[90];   /* Display RED parameters */
2234
2235         l = fs->qsize;
2236         if (fs->flags_fs & DN_QSIZE_IS_BYTES) {
2237                 if (l >= 8192)
2238                         sprintf(qs, "%d KB", l / 1024);
2239                 else
2240                         sprintf(qs, "%d B", l);
2241         } else
2242                 sprintf(qs, "%3d sl.", l);
2243         if (fs->plr)
2244                 sprintf(plr, "plr %f", 1.0 * fs->plr / (double)(0x7fffffff));
2245         else
2246                 plr[0] = '\0';
2247         if (fs->flags_fs & DN_IS_RED)   /* RED parameters */
2248                 sprintf(red,
2249                     "\n\t  %cRED w_q %f min_th %d max_th %d max_p %f",
2250                     (fs->flags_fs & DN_IS_GENTLE_RED) ? 'G' : ' ',
2251                     1.0 * fs->w_q / (double)(1 << SCALE_RED),
2252                     SCALE_VAL(fs->min_th),
2253                     SCALE_VAL(fs->max_th),
2254                     1.0 * fs->max_p / (double)(1 << SCALE_RED));
2255         else
2256                 sprintf(red, "droptail");
2257
2258         printf("%s %s%s %d queues (%d buckets) %s\n",
2259             prefix, qs, plr, fs->rq_elements, fs->rq_size, red);
2260 }
2261
2262 static void
2263 list_pipes(void *data, uint nbytes, int ac, char *av[])
2264 {
2265         int rulenum;
2266         void *next = data;
2267         struct dn_pipe *p = (struct dn_pipe *) data;
2268         struct dn_flow_set *fs;
2269         struct dn_flow_queue *q;
2270         int l;
2271
2272         if (ac > 0)
2273                 rulenum = strtoul(*av++, NULL, 10);
2274         else
2275                 rulenum = 0;
2276         for (; nbytes >= sizeof *p; p = (struct dn_pipe *)next) {
2277                 double b = p->bandwidth;
2278                 char buf[30];
2279                 char prefix[80];
2280
2281                 if (SLIST_NEXT(p, next) != (struct dn_pipe *)DN_IS_PIPE)
2282                         break;  /* done with pipes, now queues */
2283
2284                 /*
2285                  * compute length, as pipe have variable size
2286                  */
2287                 l = sizeof(*p) + p->fs.rq_elements * sizeof(*q);
2288                 next = (char *)p + l;
2289                 nbytes -= l;
2290
2291                 if ((rulenum != 0 && rulenum != p->pipe_nr) || co.do_pipe == 2)
2292                         continue;
2293
2294                 /*
2295                  * Print rate (or clocking interface)
2296                  */
2297                 if (p->if_name[0] != '\0')
2298                         sprintf(buf, "%s", p->if_name);
2299                 else if (b == 0)
2300                         sprintf(buf, "unlimited");
2301                 else if (b >= 1000000)
2302                         sprintf(buf, "%7.3f Mbit/s", b/1000000);
2303                 else if (b >= 1000)
2304                         sprintf(buf, "%7.3f Kbit/s", b/1000);
2305                 else
2306                         sprintf(buf, "%7.3f bit/s ", b);
2307
2308                 sprintf(prefix, "%05d: %s %4d ms ",
2309                     p->pipe_nr, buf, p->delay);
2310                 print_flowset_parms(&(p->fs), prefix);
2311                 if (co.verbose)
2312                         printf("   V %20qd\n", p->V >> MY_M);
2313
2314                 q = (struct dn_flow_queue *)(p+1);
2315                 list_queues(&(p->fs), q);
2316         }
2317         for (fs = next; nbytes >= sizeof *fs; fs = next) {
2318                 char prefix[80];
2319
2320                 if (SLIST_NEXT(fs, next) != (struct dn_flow_set *)DN_IS_QUEUE)
2321                         break;
2322                 l = sizeof(*fs) + fs->rq_elements * sizeof(*q);
2323                 next = (char *)fs + l;
2324                 nbytes -= l;
2325
2326                 if (rulenum != 0 && ((rulenum != fs->fs_nr && co.do_pipe == 2) ||
2327                     (rulenum != fs->parent_nr && co.do_pipe == 1))) {
2328                         continue;
2329                 }
2330
2331                 q = (struct dn_flow_queue *)(fs+1);
2332                 sprintf(prefix, "q%05d: weight %d pipe %d ",
2333                     fs->fs_nr, fs->weight, fs->parent_nr);
2334                 print_flowset_parms(fs, prefix);
2335                 list_queues(fs, q);
2336         }
2337 }
2338
2339 /*
2340  * This one handles all set-related commands
2341  *      ipfw set { show | enable | disable }
2342  *      ipfw set swap X Y
2343  *      ipfw set move X to Y
2344  *      ipfw set move rule X to Y
2345  */
2346 void
2347 ipfw_sets_handler(int ac, char *av[])
2348 {
2349         uint32_t set_disable, masks[2];
2350         int i, nbytes;
2351         uint16_t rulenum;
2352         uint8_t cmd, new_set;
2353
2354         ac--;
2355         av++;
2356
2357         if (!ac)
2358                 errx(EX_USAGE, "set needs command");
2359         if (_substrcmp(*av, "show") == 0) {
2360                 void *data;
2361                 char const *msg;
2362
2363                 nbytes = sizeof(struct ip_fw);
2364                 data = safe_calloc(1, nbytes);
2365                 if (do_cmd(IP_FW_GET, data, (uintptr_t)&nbytes) < 0)
2366                         err(EX_OSERR, "getsockopt(IP_FW_GET)");
2367                 bcopy(&((struct ip_fw *)data)->next_rule,
2368                         &set_disable, sizeof(set_disable));
2369
2370                 for (i = 0, msg = "disable" ; i < RESVD_SET; i++)
2371                         if ((set_disable & (1<<i))) {
2372                                 printf("%s %d", msg, i);
2373                                 msg = "";
2374                         }
2375                 msg = (set_disable) ? " enable" : "enable";
2376                 for (i = 0; i < RESVD_SET; i++)
2377                         if (!(set_disable & (1<<i))) {
2378                                 printf("%s %d", msg, i);
2379                                 msg = "";
2380                         }
2381                 printf("\n");
2382         } else if (_substrcmp(*av, "swap") == 0) {
2383                 ac--; av++;
2384                 if (ac != 2)
2385                         errx(EX_USAGE, "set swap needs 2 set numbers\n");
2386                 rulenum = atoi(av[0]);
2387                 new_set = atoi(av[1]);
2388                 if (!isdigit(*(av[0])) || rulenum > RESVD_SET)
2389                         errx(EX_DATAERR, "invalid set number %s\n", av[0]);
2390                 if (!isdigit(*(av[1])) || new_set > RESVD_SET)
2391                         errx(EX_DATAERR, "invalid set number %s\n", av[1]);
2392                 masks[0] = (4 << 24) | (new_set << 16) | (rulenum);
2393                 i = do_cmd(IP_FW_DEL, masks, sizeof(uint32_t));
2394         } else if (_substrcmp(*av, "move") == 0) {
2395                 ac--; av++;
2396                 if (ac && _substrcmp(*av, "rule") == 0) {
2397                         cmd = 2;
2398                         ac--; av++;
2399                 } else
2400                         cmd = 3;
2401                 if (ac != 3 || _substrcmp(av[1], "to") != 0)
2402                         errx(EX_USAGE, "syntax: set move [rule] X to Y\n");
2403                 rulenum = atoi(av[0]);
2404                 new_set = atoi(av[2]);
2405                 if (!isdigit(*(av[0])) || (cmd == 3 && rulenum > RESVD_SET) ||
2406                         (cmd == 2 && rulenum == IPFW_DEFAULT_RULE) )
2407                         errx(EX_DATAERR, "invalid source number %s\n", av[0]);
2408                 if (!isdigit(*(av[2])) || new_set > RESVD_SET)
2409                         errx(EX_DATAERR, "invalid dest. set %s\n", av[1]);
2410                 masks[0] = (cmd << 24) | (new_set << 16) | (rulenum);
2411                 i = do_cmd(IP_FW_DEL, masks, sizeof(uint32_t));
2412         } else if (_substrcmp(*av, "disable") == 0 ||
2413                    _substrcmp(*av, "enable") == 0 ) {
2414                 int which = _substrcmp(*av, "enable") == 0 ? 1 : 0;
2415
2416                 ac--; av++;
2417                 masks[0] = masks[1] = 0;
2418
2419                 while (ac) {
2420                         if (isdigit(**av)) {
2421                                 i = atoi(*av);
2422                                 if (i < 0 || i > RESVD_SET)
2423                                         errx(EX_DATAERR,
2424                                             "invalid set number %d\n", i);
2425                                 masks[which] |= (1<<i);
2426                         } else if (_substrcmp(*av, "disable") == 0)
2427                                 which = 0;
2428                         else if (_substrcmp(*av, "enable") == 0)
2429                                 which = 1;
2430                         else
2431                                 errx(EX_DATAERR,
2432                                         "invalid set command %s\n", *av);
2433                         av++; ac--;
2434                 }
2435                 if ( (masks[0] & masks[1]) != 0 )
2436                         errx(EX_DATAERR,
2437                             "cannot enable and disable the same set\n");
2438
2439                 i = do_cmd(IP_FW_DEL, masks, sizeof(masks));
2440                 if (i)
2441                         warn("set enable/disable: setsockopt(IP_FW_DEL)");
2442         } else
2443                 errx(EX_USAGE, "invalid set command %s\n", *av);
2444 }
2445
2446 void
2447 ipfw_sysctl_handler(int ac, char *av[], int which)
2448 {
2449         ac--;
2450         av++;
2451
2452         if (ac == 0) {
2453                 warnx("missing keyword to enable/disable\n");
2454         } else if (_substrcmp(*av, "firewall") == 0) {
2455                 sysctlbyname("net.inet.ip.fw.enable", NULL, 0,
2456                     &which, sizeof(which));
2457         } else if (_substrcmp(*av, "one_pass") == 0) {
2458                 sysctlbyname("net.inet.ip.fw.one_pass", NULL, 0,
2459                     &which, sizeof(which));
2460         } else if (_substrcmp(*av, "debug") == 0) {
2461                 sysctlbyname("net.inet.ip.fw.debug", NULL, 0,
2462                     &which, sizeof(which));
2463         } else if (_substrcmp(*av, "verbose") == 0) {
2464                 sysctlbyname("net.inet.ip.fw.verbose", NULL, 0,
2465                     &which, sizeof(which));
2466         } else if (_substrcmp(*av, "dyn_keepalive") == 0) {
2467                 sysctlbyname("net.inet.ip.fw.dyn_keepalive", NULL, 0,
2468                     &which, sizeof(which));
2469         } else if (_substrcmp(*av, "altq") == 0) {
2470                 altq_set_enabled(which);
2471         } else {
2472                 warnx("unrecognize enable/disable keyword: %s\n", *av);
2473         }
2474 }
2475
2476 void
2477 ipfw_list(int ac, char *av[], int show_counters)
2478 {
2479         struct ip_fw *r;
2480         ipfw_dyn_rule *dynrules, *d;
2481
2482 #define NEXT(r) ((struct ip_fw *)((char *)r + RULESIZE(r)))
2483         char *lim;
2484         void *data = NULL;
2485         int bcwidth, n, nbytes, nstat, ndyn, pcwidth, width;
2486         int exitval = EX_OK;
2487         int lac;
2488         char **lav;
2489         u_long rnum, last;
2490         char *endptr;
2491         int seen = 0;
2492         uint8_t set;
2493
2494         const int ocmd = co.do_pipe ? IP_DUMMYNET_GET : IP_FW_GET;
2495         int nalloc = 1024;      /* start somewhere... */
2496
2497         last = 0;
2498
2499         if (co.test_only) {
2500                 fprintf(stderr, "Testing only, list disabled\n");
2501                 return;
2502         }
2503
2504         ac--;
2505         av++;
2506
2507         /* get rules or pipes from kernel, resizing array as necessary */
2508         nbytes = nalloc;
2509
2510         while (nbytes >= nalloc) {
2511                 nalloc = nalloc * 2 + 200;
2512                 nbytes = nalloc;
2513                 data = safe_realloc(data, nbytes);
2514                 if (do_cmd(ocmd, data, (uintptr_t)&nbytes) < 0)
2515                         err(EX_OSERR, "getsockopt(IP_%s_GET)",
2516                                 co.do_pipe ? "DUMMYNET" : "FW");
2517         }
2518
2519         if (co.do_pipe) {
2520                 list_pipes(data, nbytes, ac, av);
2521                 goto done;
2522         }
2523
2524         /*
2525          * Count static rules. They have variable size so we
2526          * need to scan the list to count them.
2527          */
2528         for (nstat = 1, r = data, lim = (char *)data + nbytes;
2529                     r->rulenum < IPFW_DEFAULT_RULE && (char *)r < lim;
2530                     ++nstat, r = NEXT(r) )
2531                 ; /* nothing */
2532
2533         /*
2534          * Count dynamic rules. This is easier as they have
2535          * fixed size.
2536          */
2537         r = NEXT(r);
2538         dynrules = (ipfw_dyn_rule *)r ;
2539         n = (char *)r - (char *)data;
2540         ndyn = (nbytes - n) / sizeof *dynrules;
2541
2542         /* if showing stats, figure out column widths ahead of time */
2543         bcwidth = pcwidth = 0;
2544         if (show_counters) {
2545                 for (n = 0, r = data; n < nstat; n++, r = NEXT(r)) {
2546                         /* skip rules from another set */
2547                         if (co.use_set && r->set != co.use_set - 1)
2548                                 continue;
2549
2550                         /* packet counter */
2551                         width = snprintf(NULL, 0, "%llu",
2552                             align_uint64(&r->pcnt));
2553                         if (width > pcwidth)
2554                                 pcwidth = width;
2555
2556                         /* byte counter */
2557                         width = snprintf(NULL, 0, "%llu",
2558                             align_uint64(&r->bcnt));
2559                         if (width > bcwidth)
2560                                 bcwidth = width;
2561                 }
2562         }
2563         if (co.do_dynamic && ndyn) {
2564                 for (n = 0, d = dynrules; n < ndyn; n++, d++) {
2565                         if (co.use_set) {
2566                                 /* skip rules from another set */
2567                                 bcopy((char *)&d->rule + sizeof(uint16_t),
2568                                       &set, sizeof(uint8_t));
2569                                 if (set != co.use_set - 1)
2570                                         continue;
2571                         }
2572                         width = snprintf(NULL, 0, "%llu",
2573                             align_uint64(&d->pcnt));
2574                         if (width > pcwidth)
2575                                 pcwidth = width;
2576
2577                         width = snprintf(NULL, 0, "%llu",
2578                             align_uint64(&d->bcnt));
2579                         if (width > bcwidth)
2580                                 bcwidth = width;
2581                 }
2582         }
2583         /* if no rule numbers were specified, list all rules */
2584         if (ac == 0) {
2585                 for (n = 0, r = data; n < nstat; n++, r = NEXT(r)) {
2586                         if (co.use_set && r->set != co.use_set - 1)
2587                                 continue;
2588                         show_ipfw(r, pcwidth, bcwidth);
2589                 }
2590
2591                 if (co.do_dynamic && ndyn) {
2592                         printf("## Dynamic rules (%d):\n", ndyn);
2593                         for (n = 0, d = dynrules; n < ndyn; n++, d++) {
2594                                 if (co.use_set) {
2595                                         bcopy((char *)&d->rule + sizeof(uint16_t),
2596                                               &set, sizeof(uint8_t));
2597                                         if (set != co.use_set - 1)
2598                                                 continue;
2599                                 }
2600                                 show_dyn_ipfw(d, pcwidth, bcwidth);
2601                 }
2602                 }
2603                 goto done;
2604         }
2605
2606         /* display specific rules requested on command line */
2607
2608         for (lac = ac, lav = av; lac != 0; lac--) {
2609                 /* convert command line rule # */
2610                 last = rnum = strtoul(*lav++, &endptr, 10);
2611                 if (*endptr == '-')
2612                         last = strtoul(endptr+1, &endptr, 10);
2613                 if (*endptr) {
2614                         exitval = EX_USAGE;
2615                         warnx("invalid rule number: %s", *(lav - 1));
2616                         continue;
2617                 }
2618                 for (n = seen = 0, r = data; n < nstat; n++, r = NEXT(r) ) {
2619                         if (r->rulenum > last)
2620                                 break;
2621                         if (co.use_set && r->set != co.use_set - 1)
2622                                 continue;
2623                         if (r->rulenum >= rnum && r->rulenum <= last) {
2624                                 show_ipfw(r, pcwidth, bcwidth);
2625                                 seen = 1;
2626                         }
2627                 }
2628                 if (!seen) {
2629                         /* give precedence to other error(s) */
2630                         if (exitval == EX_OK)
2631                                 exitval = EX_UNAVAILABLE;
2632                         warnx("rule %lu does not exist", rnum);
2633                 }
2634         }
2635
2636         if (co.do_dynamic && ndyn) {
2637                 printf("## Dynamic rules:\n");
2638                 for (lac = ac, lav = av; lac != 0; lac--) {
2639                         last = rnum = strtoul(*lav++, &endptr, 10);
2640                         if (*endptr == '-')
2641                                 last = strtoul(endptr+1, &endptr, 10);
2642                         if (*endptr)
2643                                 /* already warned */
2644                                 continue;
2645                         for (n = 0, d = dynrules; n < ndyn; n++, d++) {
2646                                 uint16_t rulenum;
2647
2648                                 bcopy(&d->rule, &rulenum, sizeof(rulenum));
2649                                 if (rulenum > rnum)
2650                                         break;
2651                                 if (co.use_set) {
2652                                         bcopy((char *)&d->rule + sizeof(uint16_t),
2653                                               &set, sizeof(uint8_t));
2654                                         if (set != co.use_set - 1)
2655                                                 continue;
2656                                 }
2657                                 if (r->rulenum >= rnum && r->rulenum <= last)
2658                                         show_dyn_ipfw(d, pcwidth, bcwidth);
2659                         }
2660                 }
2661         }
2662
2663         ac = 0;
2664
2665 done:
2666         free(data);
2667
2668         if (exitval != EX_OK)
2669                 exit(exitval);
2670 #undef NEXT
2671 }
2672
2673 static int
2674 lookup_host (char *host, struct in_addr *ipaddr)
2675 {
2676         struct hostent *he;
2677
2678         if (!inet_aton(host, ipaddr)) {
2679                 if ((he = gethostbyname(host)) == NULL)
2680                         return(-1);
2681                 *ipaddr = *(struct in_addr *)he->h_addr_list[0];
2682         }
2683         return(0);
2684 }
2685
2686 /*
2687  * fills the addr and mask fields in the instruction as appropriate from av.
2688  * Update length as appropriate.
2689  * The following formats are allowed:
2690  *      me      returns O_IP_*_ME
2691  *      1.2.3.4         single IP address
2692  *      1.2.3.4:5.6.7.8 address:mask
2693  *      1.2.3.4/24      address/mask
2694  *      1.2.3.4/26{1,6,5,4,23}  set of addresses in a subnet
2695  * We can have multiple comma-separated address/mask entries.
2696  */
2697 static void
2698 fill_ip(ipfw_insn_ip *cmd, char *av)
2699 {
2700         int len = 0;
2701         uint32_t *d = ((ipfw_insn_u32 *)cmd)->d;
2702
2703         cmd->o.len &= ~F_LEN_MASK;      /* zero len */
2704
2705         if (_substrcmp(av, "any") == 0)
2706                 return;
2707
2708         if (_substrcmp(av, "me") == 0) {
2709                 cmd->o.len |= F_INSN_SIZE(ipfw_insn);
2710                 return;
2711         }
2712
2713         if (strncmp(av, "table(", 6) == 0) {
2714                 char *p = strchr(av + 6, ',');
2715
2716                 if (p)
2717                         *p++ = '\0';
2718                 cmd->o.opcode = O_IP_DST_LOOKUP;
2719                 cmd->o.arg1 = strtoul(av + 6, NULL, 0);
2720                 if (p) {
2721                         cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32);
2722                         d[0] = strtoul(p, NULL, 0);
2723                 } else
2724                         cmd->o.len |= F_INSN_SIZE(ipfw_insn);
2725                 return;
2726         }
2727
2728     while (av) {
2729         /*
2730          * After the address we can have '/' or ':' indicating a mask,
2731          * ',' indicating another address follows, '{' indicating a
2732          * set of addresses of unspecified size.
2733          */
2734         char *t = NULL, *p = strpbrk(av, "/:,{");
2735         int masklen;
2736         char md, nd = '\0';
2737
2738         if (p) {
2739                 md = *p;
2740                 *p++ = '\0';
2741                 if ((t = strpbrk(p, ",{")) != NULL) {
2742                         nd = *t;
2743                         *t = '\0';
2744                 }
2745         } else
2746                 md = '\0';
2747
2748         if (lookup_host(av, (struct in_addr *)&d[0]) != 0)
2749                 errx(EX_NOHOST, "hostname ``%s'' unknown", av);
2750         switch (md) {
2751         case ':':
2752                 if (!inet_aton(p, (struct in_addr *)&d[1]))
2753                         errx(EX_DATAERR, "bad netmask ``%s''", p);
2754                 break;
2755         case '/':
2756                 masklen = atoi(p);
2757                 if (masklen == 0)
2758                         d[1] = htonl(0);        /* mask */
2759                 else if (masklen > 32)
2760                         errx(EX_DATAERR, "bad width ``%s''", p);
2761                 else
2762                         d[1] = htonl(~0 << (32 - masklen));
2763                 break;
2764         case '{':       /* no mask, assume /24 and put back the '{' */
2765                 d[1] = htonl(~0 << (32 - 24));
2766                 *(--p) = md;
2767                 break;
2768
2769         case ',':       /* single address plus continuation */
2770                 *(--p) = md;
2771                 /* FALLTHROUGH */
2772         case 0:         /* initialization value */
2773         default:
2774                 d[1] = htonl(~0);       /* force /32 */
2775                 break;
2776         }
2777         d[0] &= d[1];           /* mask base address with mask */
2778         if (t)
2779                 *t = nd;
2780         /* find next separator */
2781         if (p)
2782                 p = strpbrk(p, ",{");
2783         if (p && *p == '{') {
2784                 /*
2785                  * We have a set of addresses. They are stored as follows:
2786                  *   arg1       is the set size (powers of 2, 2..256)
2787                  *   addr       is the base address IN HOST FORMAT
2788                  *   mask..     is an array of arg1 bits (rounded up to
2789                  *              the next multiple of 32) with bits set
2790                  *              for each host in the map.
2791                  */
2792                 uint32_t *map = (uint32_t *)&cmd->mask;
2793                 int low, high;
2794                 int i = contigmask((uint8_t *)&(d[1]), 32);
2795
2796                 if (len > 0)
2797                         errx(EX_DATAERR, "address set cannot be in a list");
2798                 if (i < 24 || i > 31)
2799                         errx(EX_DATAERR, "invalid set with mask %d\n", i);
2800                 cmd->o.arg1 = 1<<(32-i);        /* map length           */
2801                 d[0] = ntohl(d[0]);             /* base addr in host format */
2802                 cmd->o.opcode = O_IP_DST_SET;   /* default */
2803                 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32) + (cmd->o.arg1+31)/32;
2804                 for (i = 0; i < (cmd->o.arg1+31)/32 ; i++)
2805                         map[i] = 0;     /* clear map */
2806
2807                 av = p + 1;
2808                 low = d[0] & 0xff;
2809                 high = low + cmd->o.arg1 - 1;
2810                 /*
2811                  * Here, i stores the previous value when we specify a range
2812                  * of addresses within a mask, e.g. 45-63. i = -1 means we
2813                  * have no previous value.
2814                  */
2815                 i = -1; /* previous value in a range */
2816                 while (isdigit(*av)) {
2817                         char *s;
2818                         int a = strtol(av, &s, 0);
2819
2820                         if (s == av) { /* no parameter */
2821                             if (*av != '}')
2822                                 errx(EX_DATAERR, "set not closed\n");
2823                             if (i != -1)
2824                                 errx(EX_DATAERR, "incomplete range %d-", i);
2825                             break;
2826                         }
2827                         if (a < low || a > high)
2828                             errx(EX_DATAERR, "addr %d out of range [%d-%d]\n",
2829                                 a, low, high);
2830                         a -= low;
2831                         if (i == -1)    /* no previous in range */
2832                             i = a;
2833                         else {          /* check that range is valid */
2834                             if (i > a)
2835                                 errx(EX_DATAERR, "invalid range %d-%d",
2836                                         i+low, a+low);
2837                             if (*s == '-')
2838                                 errx(EX_DATAERR, "double '-' in range");
2839                         }
2840                         for (; i <= a; i++)
2841                             map[i/32] |= 1<<(i & 31);
2842                         i = -1;
2843                         if (*s == '-')
2844                             i = a;
2845                         else if (*s == '}')
2846                             break;
2847                         av = s+1;
2848                 }
2849                 return;
2850         }
2851         av = p;
2852         if (av)                 /* then *av must be a ',' */
2853                 av++;
2854
2855         /* Check this entry */
2856         if (d[1] == 0) { /* "any", specified as x.x.x.x/0 */
2857                 /*
2858                  * 'any' turns the entire list into a NOP.
2859                  * 'not any' never matches, so it is removed from the
2860                  * list unless it is the only item, in which case we
2861                  * report an error.
2862                  */
2863                 if (cmd->o.len & F_NOT) {       /* "not any" never matches */
2864                         if (av == NULL && len == 0) /* only this entry */
2865                                 errx(EX_DATAERR, "not any never matches");
2866                 }
2867                 /* else do nothing and skip this entry */
2868                 return;
2869         }
2870         /* A single IP can be stored in an optimized format */
2871         if (d[1] == ~0 && av == NULL && len == 0) {
2872                 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32);
2873                 return;
2874         }
2875         len += 2;       /* two words... */
2876         d += 2;
2877     } /* end while */
2878     if (len + 1 > F_LEN_MASK)
2879         errx(EX_DATAERR, "address list too long");
2880     cmd->o.len |= len+1;
2881 }
2882
2883
2884 /* Try to find ipv6 address by hostname */
2885 static int
2886 lookup_host6 (char *host, struct in6_addr *ip6addr)
2887 {
2888         struct hostent *he;
2889
2890         if (!inet_pton(AF_INET6, host, ip6addr)) {
2891                 if ((he = gethostbyname2(host, AF_INET6)) == NULL)
2892                         return(-1);
2893                 memcpy(ip6addr, he->h_addr_list[0], sizeof( struct in6_addr));
2894         }
2895         return(0);
2896 }
2897
2898
2899 /* n2mask sets n bits of the mask */
2900 static void
2901 n2mask(struct in6_addr *mask, int n)
2902 {
2903         static int      minimask[9] =
2904             { 0x00, 0x80, 0xc0, 0xe0, 0xf0, 0xf8, 0xfc, 0xfe, 0xff };
2905         u_char          *p;
2906
2907         memset(mask, 0, sizeof(struct in6_addr));
2908         p = (u_char *) mask;
2909         for (; n > 0; p++, n -= 8) {
2910                 if (n >= 8)
2911                         *p = 0xff;
2912                 else
2913                         *p = minimask[n];
2914         }
2915         return;
2916 }
2917
2918
2919 /*
2920  * fill the addr and mask fields in the instruction as appropriate from av.
2921  * Update length as appropriate.
2922  * The following formats are allowed:
2923  *     any     matches any IP6. Actually returns an empty instruction.
2924  *     me      returns O_IP6_*_ME
2925  *
2926  *     03f1::234:123:0342                single IP6 addres
2927  *     03f1::234:123:0342/24            address/mask
2928  *     03f1::234:123:0342/24,03f1::234:123:0343/               List of address
2929  *
2930  * Set of address (as in ipv6) not supported because ipv6 address
2931  * are typically random past the initial prefix.
2932  * Return 1 on success, 0 on failure.
2933  */
2934 static int
2935 fill_ip6(ipfw_insn_ip6 *cmd, char *av)
2936 {
2937         int len = 0;
2938         struct in6_addr *d = &(cmd->addr6);
2939         /*
2940          * Needed for multiple address.
2941          * Note d[1] points to struct in6_add r mask6 of cmd
2942          */
2943
2944        cmd->o.len &= ~F_LEN_MASK;       /* zero len */
2945
2946        if (strcmp(av, "any") == 0)
2947                return (1);
2948
2949
2950        if (strcmp(av, "me") == 0) {     /* Set the data for "me" opt*/
2951                cmd->o.len |= F_INSN_SIZE(ipfw_insn);
2952                return (1);
2953        }
2954
2955        if (strcmp(av, "me6") == 0) {    /* Set the data for "me" opt*/
2956                cmd->o.len |= F_INSN_SIZE(ipfw_insn);
2957                return (1);
2958        }
2959
2960        av = strdup(av);
2961        while (av) {
2962                 /*
2963                  * After the address we can have '/' indicating a mask,
2964                  * or ',' indicating another address follows.
2965                  */
2966
2967                 char *p;
2968                 int masklen;
2969                 char md = '\0';
2970
2971                 if ((p = strpbrk(av, "/,")) ) {
2972                         md = *p;        /* save the separator */
2973                         *p = '\0';      /* terminate address string */
2974                         p++;            /* and skip past it */
2975                 }
2976                 /* now p points to NULL, mask or next entry */
2977
2978                 /* lookup stores address in *d as a side effect */
2979                 if (lookup_host6(av, d) != 0) {
2980                         /* XXX: failed. Free memory and go */
2981                         errx(EX_DATAERR, "bad address \"%s\"", av);
2982                 }
2983                 /* next, look at the mask, if any */
2984                 masklen = (md == '/') ? atoi(p) : 128;
2985                 if (masklen > 128 || masklen < 0)
2986                         errx(EX_DATAERR, "bad width \"%s\''", p);
2987                 else
2988                         n2mask(&d[1], masklen);
2989
2990                 APPLY_MASK(d, &d[1])   /* mask base address with mask */
2991
2992                 /* find next separator */
2993
2994                 if (md == '/') {        /* find separator past the mask */
2995                         p = strpbrk(p, ",");
2996                         if (p != NULL)
2997                                 p++;
2998                 }
2999                 av = p;
3000
3001                 /* Check this entry */
3002                 if (masklen == 0) {
3003                         /*
3004                          * 'any' turns the entire list into a NOP.
3005                          * 'not any' never matches, so it is removed from the
3006                          * list unless it is the only item, in which case we
3007                          * report an error.
3008                          */
3009                         if (cmd->o.len & F_NOT && av == NULL && len == 0)
3010                                 errx(EX_DATAERR, "not any never matches");
3011                         continue;
3012                 }
3013
3014                 /*
3015                  * A single IP can be stored alone
3016                  */
3017                 if (masklen == 128 && av == NULL && len == 0) {
3018                         len = F_INSN_SIZE(struct in6_addr);
3019                         break;
3020                 }
3021
3022                 /* Update length and pointer to arguments */
3023                 len += F_INSN_SIZE(struct in6_addr)*2;
3024                 d += 2;
3025         } /* end while */
3026
3027         /*
3028          * Total length of the command, remember that 1 is the size of
3029          * the base command.
3030          */
3031         if (len + 1 > F_LEN_MASK)
3032                 errx(EX_DATAERR, "address list too long");
3033         cmd->o.len |= len+1;
3034         free(av);
3035         return (1);
3036 }
3037
3038 /*
3039  * fills command for ipv6 flow-id filtering
3040  * note that the 20 bit flow number is stored in a array of u_int32_t
3041  * it's supported lists of flow-id, so in the o.arg1 we store how many
3042  * additional flow-id we want to filter, the basic is 1
3043  */
3044 static void
3045 fill_flow6( ipfw_insn_u32 *cmd, char *av )
3046 {
3047         u_int32_t type;  /* Current flow number */
3048         u_int16_t nflow = 0;    /* Current flow index */
3049         char *s = av;
3050         cmd->d[0] = 0;    /* Initializing the base number*/
3051
3052         while (s) {
3053                 av = strsep( &s, ",") ;
3054                 type = strtoul(av, &av, 0);
3055                 if (*av != ',' && *av != '\0')
3056                         errx(EX_DATAERR, "invalid ipv6 flow number %s", av);
3057                 if (type > 0xfffff)
3058                         errx(EX_DATAERR, "flow number out of range %s", av);
3059                 cmd->d[nflow] |= type;
3060                 nflow++;
3061         }
3062         if( nflow > 0 ) {
3063                 cmd->o.opcode = O_FLOW6ID;
3064                 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32) + nflow;
3065                 cmd->o.arg1 = nflow;
3066         }
3067         else {
3068                 errx(EX_DATAERR, "invalid ipv6 flow number %s", av);
3069         }
3070 }
3071
3072 static ipfw_insn *
3073 add_srcip6(ipfw_insn *cmd, char *av)
3074 {
3075
3076         fill_ip6((ipfw_insn_ip6 *)cmd, av);
3077         if (F_LEN(cmd) == 0) {                          /* any */
3078         } else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn)) {      /* "me" */
3079                 cmd->opcode = O_IP6_SRC_ME;
3080         } else if (F_LEN(cmd) ==
3081             (F_INSN_SIZE(struct in6_addr) + F_INSN_SIZE(ipfw_insn))) {
3082                 /* single IP, no mask*/
3083                 cmd->opcode = O_IP6_SRC;
3084         } else {                                        /* addr/mask opt */
3085                 cmd->opcode = O_IP6_SRC_MASK;
3086         }
3087         return cmd;
3088 }
3089
3090 static ipfw_insn *
3091 add_dstip6(ipfw_insn *cmd, char *av)
3092 {
3093
3094         fill_ip6((ipfw_insn_ip6 *)cmd, av);
3095         if (F_LEN(cmd) == 0) {                          /* any */
3096         } else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn)) {      /* "me" */
3097                 cmd->opcode = O_IP6_DST_ME;
3098         } else if (F_LEN(cmd) ==
3099             (F_INSN_SIZE(struct in6_addr) + F_INSN_SIZE(ipfw_insn))) {
3100                 /* single IP, no mask*/
3101                 cmd->opcode = O_IP6_DST;
3102         } else {                                        /* addr/mask opt */
3103                 cmd->opcode = O_IP6_DST_MASK;
3104         }
3105         return cmd;
3106 }
3107
3108
3109 /*
3110  * helper function to process a set of flags and set bits in the
3111  * appropriate masks.
3112  */
3113 static void
3114 fill_flags(ipfw_insn *cmd, enum ipfw_opcodes opcode,
3115         struct _s_x *flags, char *p)
3116 {
3117         uint8_t set=0, clear=0;
3118
3119         while (p && *p) {
3120                 char *q;        /* points to the separator */
3121                 int val;
3122                 uint8_t *which; /* mask we are working on */
3123
3124                 if (*p == '!') {
3125                         p++;
3126                         which = &clear;
3127                 } else
3128                         which = &set;
3129                 q = strchr(p, ',');
3130                 if (q)
3131                         *q++ = '\0';
3132                 val = match_token(flags, p);
3133                 if (val <= 0)
3134                         errx(EX_DATAERR, "invalid flag %s", p);
3135                 *which |= (uint8_t)val;
3136                 p = q;
3137         }
3138         cmd->opcode = opcode;
3139         cmd->len =  (cmd->len & (F_NOT | F_OR)) | 1;
3140         cmd->arg1 = (set & 0xff) | ( (clear & 0xff) << 8);
3141 }
3142
3143
3144 void
3145 ipfw_delete(int ac, char *av[])
3146 {
3147         uint32_t rulenum;
3148         struct dn_pipe p;
3149         int i;
3150         int exitval = EX_OK;
3151         int do_set = 0;
3152
3153         memset(&p, 0, sizeof p);
3154
3155         av++; ac--;
3156         NEED1("missing rule specification");
3157         if (ac > 0 && _substrcmp(*av, "set") == 0) {
3158                 /* Do not allow using the following syntax:
3159                  *      ipfw set N delete set M
3160                  */
3161                 if (co.use_set)
3162                         errx(EX_DATAERR, "invalid syntax");
3163                 do_set = 1;     /* delete set */
3164                 ac--; av++;
3165         }
3166
3167         /* Rule number */
3168         while (ac && isdigit(**av)) {
3169                 i = atoi(*av); av++; ac--;
3170                 if (co.do_nat) {
3171                         exitval = do_cmd(IP_FW_NAT_DEL, &i, sizeof i);
3172                         if (exitval) {
3173                                 exitval = EX_UNAVAILABLE;
3174                                 warn("rule %u not available", i);
3175                         }
3176                 } else if (co.do_pipe) {
3177                         if (co.do_pipe == 1)
3178                                 p.pipe_nr = i;
3179                         else
3180                                 p.fs.fs_nr = i;
3181                         i = do_cmd(IP_DUMMYNET_DEL, &p, sizeof p);
3182                         if (i) {
3183                                 exitval = 1;
3184                                 warn("rule %u: setsockopt(IP_DUMMYNET_DEL)",
3185                                     co.do_pipe == 1 ? p.pipe_nr : p.fs.fs_nr);
3186                         }
3187                 } else {
3188                         if (co.use_set)
3189                                 rulenum = (i & 0xffff) | (5 << 24) |
3190                                     ((co.use_set - 1) << 16);
3191                         else
3192                         rulenum =  (i & 0xffff) | (do_set << 24);
3193                         i = do_cmd(IP_FW_DEL, &rulenum, sizeof rulenum);
3194                         if (i) {
3195                                 exitval = EX_UNAVAILABLE;
3196                                 warn("rule %u: setsockopt(IP_FW_DEL)",
3197                                     rulenum);
3198                         }
3199                 }
3200         }
3201         if (exitval != EX_OK)
3202                 exit(exitval);
3203 }
3204
3205
3206 /*
3207  * fill the interface structure. We do not check the name as we can
3208  * create interfaces dynamically, so checking them at insert time
3209  * makes relatively little sense.
3210  * Interface names containing '*', '?', or '[' are assumed to be shell
3211  * patterns which match interfaces.
3212  */
3213 static void
3214 fill_iface(ipfw_insn_if *cmd, char *arg)
3215 {
3216         cmd->name[0] = '\0';
3217         cmd->o.len |= F_INSN_SIZE(ipfw_insn_if);
3218
3219         /* Parse the interface or address */
3220         if (strcmp(arg, "any") == 0)
3221                 cmd->o.len = 0;         /* effectively ignore this command */
3222         else if (!isdigit(*arg)) {
3223                 strlcpy(cmd->name, arg, sizeof(cmd->name));
3224                 cmd->p.glob = strpbrk(arg, "*?[") != NULL ? 1 : 0;
3225         } else if (!inet_aton(arg, &cmd->p.ip))
3226                 errx(EX_DATAERR, "bad ip address ``%s''", arg);
3227 }
3228
3229 /*
3230  * Search for interface with name "ifn", and fill n accordingly:
3231  *
3232  * n->ip        ip address of interface "ifn"
3233  * n->if_name   copy of interface name "ifn"
3234  */
3235 static void
3236 set_addr_dynamic(const char *ifn, struct cfg_nat *n)
3237 {
3238         size_t needed;
3239         int mib[6];
3240         char *buf, *lim, *next;
3241         struct if_msghdr *ifm;
3242         struct ifa_msghdr *ifam;
3243         struct sockaddr_dl *sdl;
3244         struct sockaddr_in *sin;
3245         int ifIndex, ifMTU;
3246
3247         mib[0] = CTL_NET;
3248         mib[1] = PF_ROUTE;
3249         mib[2] = 0;
3250         mib[3] = AF_INET;
3251         mib[4] = NET_RT_IFLIST;
3252         mib[5] = 0;
3253 /*
3254  * Get interface data.
3255  */
3256         if (sysctl(mib, 6, NULL, &needed, NULL, 0) == -1)
3257                 err(1, "iflist-sysctl-estimate");
3258         buf = safe_calloc(1, needed);
3259         if (sysctl(mib, 6, buf, &needed, NULL, 0) == -1)
3260                 err(1, "iflist-sysctl-get");
3261         lim = buf + needed;
3262 /*
3263  * Loop through interfaces until one with
3264  * given name is found. This is done to
3265  * find correct interface index for routing
3266  * message processing.
3267  */
3268         ifIndex = 0;
3269         next = buf;
3270         while (next < lim) {
3271                 ifm = (struct if_msghdr *)next;
3272                 next += ifm->ifm_msglen;
3273                 if (ifm->ifm_version != RTM_VERSION) {
3274                         if (co.verbose)
3275                                 warnx("routing message version %d "
3276                                     "not understood", ifm->ifm_version);
3277                         continue;
3278                 }
3279                 if (ifm->ifm_type == RTM_IFINFO) {
3280                         sdl = (struct sockaddr_dl *)(ifm + 1);
3281                         if (strlen(ifn) == sdl->sdl_nlen &&
3282                             strncmp(ifn, sdl->sdl_data, sdl->sdl_nlen) == 0) {
3283                                 ifIndex = ifm->ifm_index;
3284                                 ifMTU = ifm->ifm_data.ifi_mtu;
3285                                 break;
3286                         }
3287                 }
3288         }
3289         if (!ifIndex)
3290                 errx(1, "unknown interface name %s", ifn);
3291 /*
3292  * Get interface address.
3293  */
3294         sin = NULL;
3295         while (next < lim) {
3296                 ifam = (struct ifa_msghdr *)next;
3297                 next += ifam->ifam_msglen;
3298                 if (ifam->ifam_version != RTM_VERSION) {
3299                         if (co.verbose)
3300                                 warnx("routing message version %d "
3301                                     "not understood", ifam->ifam_version);
3302                         continue;
3303                 }
3304                 if (ifam->ifam_type != RTM_NEWADDR)
3305                         break;
3306                 if (ifam->ifam_addrs & RTA_IFA) {
3307                         int i;
3308                         char *cp = (char *)(ifam + 1);
3309
3310                         for (i = 1; i < RTA_IFA; i <<= 1) {
3311                                 if (ifam->ifam_addrs & i)
3312                                         cp += SA_SIZE((struct sockaddr *)cp);
3313                         }
3314                         if (((struct sockaddr *)cp)->sa_family == AF_INET) {
3315                                 sin = (struct sockaddr_in *)cp;
3316                                 break;
3317                         }
3318                 }
3319         }
3320         if (sin == NULL)
3321                 errx(1, "%s: cannot get interface address", ifn);
3322
3323         n->ip = sin->sin_addr;
3324         strncpy(n->if_name, ifn, IF_NAMESIZE);
3325
3326         free(buf);
3327 }
3328
3329 /*
3330  * XXX - The following functions, macros and definitions come from natd.c:
3331  * it would be better to move them outside natd.c, in a file
3332  * (redirect_support.[ch]?) shared by ipfw and natd, but for now i can live
3333  * with it.
3334  */
3335
3336 /*
3337  * Definition of a port range, and macros to deal with values.
3338  * FORMAT:  HI 16-bits == first port in range, 0 == all ports.
3339  *          LO 16-bits == number of ports in range
3340  * NOTES:   - Port values are not stored in network byte order.
3341  */
3342
3343 #define port_range u_long
3344
3345 #define GETLOPORT(x)     ((x) >> 0x10)
3346 #define GETNUMPORTS(x)   ((x) & 0x0000ffff)
3347 #define GETHIPORT(x)     (GETLOPORT((x)) + GETNUMPORTS((x)))
3348
3349 /* Set y to be the low-port value in port_range variable x. */
3350 #define SETLOPORT(x,y)   ((x) = ((x) & 0x0000ffff) | ((y) << 0x10))
3351
3352 /* Set y to be the number of ports in port_range variable x. */
3353 #define SETNUMPORTS(x,y) ((x) = ((x) & 0xffff0000) | (y))
3354
3355 static void
3356 StrToAddr (const char* str, struct in_addr* addr)
3357 {
3358         struct hostent* hp;
3359
3360         if (inet_aton (str, addr))
3361                 return;
3362
3363         hp = gethostbyname (str);
3364         if (!hp)
3365                 errx (1, "unknown host %s", str);
3366
3367         memcpy (addr, hp->h_addr, sizeof (struct in_addr));
3368 }
3369
3370 static int
3371 StrToPortRange (const char* str, const char* proto, port_range *portRange)
3372 {
3373         char*           sep;
3374         struct servent* sp;
3375         char*           end;
3376         u_short         loPort;
3377         u_short         hiPort;
3378
3379         /* First see if this is a service, return corresponding port if so. */
3380         sp = getservbyname (str,proto);
3381         if (sp) {
3382                 SETLOPORT(*portRange, ntohs(sp->s_port));
3383                 SETNUMPORTS(*portRange, 1);
3384                 return 0;
3385         }
3386
3387         /* Not a service, see if it's a single port or port range. */
3388         sep = strchr (str, '-');
3389         if (sep == NULL) {
3390                 SETLOPORT(*portRange, strtol(str, &end, 10));
3391                 if (end != str) {
3392                         /* Single port. */
3393                         SETNUMPORTS(*portRange, 1);
3394                         return 0;
3395                 }
3396
3397                 /* Error in port range field. */
3398                 errx (EX_DATAERR, "%s/%s: unknown service", str, proto);
3399         }
3400
3401         /* Port range, get the values and sanity check. */
3402         sscanf (str, "%hu-%hu", &loPort, &hiPort);
3403         SETLOPORT(*portRange, loPort);
3404         SETNUMPORTS(*portRange, 0);     /* Error by default */
3405         if (loPort <= hiPort)
3406                 SETNUMPORTS(*portRange, hiPort - loPort + 1);
3407
3408         if (GETNUMPORTS(*portRange) == 0)
3409                 errx (EX_DATAERR, "invalid port range %s", str);
3410
3411         return 0;
3412 }
3413
3414 static int
3415 StrToProto (const char* str)
3416 {
3417         if (!strcmp (str, "tcp"))
3418                 return IPPROTO_TCP;
3419
3420         if (!strcmp (str, "udp"))
3421                 return IPPROTO_UDP;
3422
3423         errx (EX_DATAERR, "unknown protocol %s. Expected tcp or udp", str);
3424 }
3425
3426 static int
3427 StrToAddrAndPortRange (const char* str, struct in_addr* addr, char* proto,
3428                        port_range *portRange)
3429 {
3430         char*   ptr;
3431
3432         ptr = strchr (str, ':');
3433         if (!ptr)
3434                 errx (EX_DATAERR, "%s is missing port number", str);
3435
3436         *ptr = '\0';
3437         ++ptr;
3438
3439         StrToAddr (str, addr);
3440         return StrToPortRange (ptr, proto, portRange);
3441 }
3442
3443 /* End of stuff taken from natd.c. */
3444
3445 #define INC_ARGCV() do {        \
3446         (*_av)++;               \
3447         (*_ac)--;               \
3448         av = *_av;              \
3449         ac = *_ac;              \
3450 } while(0)
3451
3452 /*
3453  * The next 3 functions add support for the addr, port and proto redirect and
3454  * their logic is loosely based on SetupAddressRedirect(), SetupPortRedirect()
3455  * and SetupProtoRedirect() from natd.c.
3456  *
3457  * Every setup_* function fills at least one redirect entry
3458  * (struct cfg_redir) and zero or more server pool entry (struct cfg_spool)
3459  * in buf.
3460  *
3461  * The format of data in buf is:
3462  *
3463  *
3464  *     cfg_nat    cfg_redir    cfg_spool    ......  cfg_spool
3465  *
3466  *    -------------------------------------        ------------
3467  *   |          | .....X ... |          |         |           |  .....
3468  *    ------------------------------------- ...... ------------
3469  *                     ^
3470  *                spool_cnt       n=0       ......   n=(X-1)
3471  *
3472  * len points to the amount of available space in buf
3473  * space counts the memory consumed by every function
3474  *
3475  * XXX - Every function get all the argv params so it
3476  * has to check, in optional parameters, that the next
3477  * args is a valid option for the redir entry and not
3478  * another token. Only redir_port and redir_proto are
3479  * affected by this.
3480  */
3481
3482 static int
3483 setup_redir_addr(char *spool_buf, int len,
3484                  int *_ac, char ***_av)
3485 {
3486         char **av, *sep; /* Token separator. */
3487         /* Temporary buffer used to hold server pool ip's. */
3488         char tmp_spool_buf[NAT_BUF_LEN];
3489         int ac, space, lsnat;
3490         struct cfg_redir *r;
3491         struct cfg_spool *tmp;
3492
3493         av = *_av;
3494         ac = *_ac;
3495         space = 0;
3496         lsnat = 0;
3497         if (len >= SOF_REDIR) {
3498                 r = (struct cfg_redir *)spool_buf;
3499                 /* Skip cfg_redir at beginning of buf. */
3500                 spool_buf = &spool_buf[SOF_REDIR];
3501                 space = SOF_REDIR;
3502                 len -= SOF_REDIR;
3503         } else
3504                 goto nospace;
3505         r->mode = REDIR_ADDR;
3506         /* Extract local address. */
3507         if (ac == 0)
3508                 errx(EX_DATAERR, "redirect_addr: missing local address");
3509         sep = strchr(*av, ',');
3510         if (sep) {              /* LSNAT redirection syntax. */
3511                 r->laddr.s_addr = INADDR_NONE;
3512                 /* Preserve av, copy spool servers to tmp_spool_buf. */
3513                 strncpy(tmp_spool_buf, *av, strlen(*av)+1);
3514                 lsnat = 1;
3515         } else
3516                 StrToAddr(*av, &r->laddr);
3517         INC_ARGCV();
3518
3519         /* Extract public address. */
3520         if (ac == 0)
3521                 errx(EX_DATAERR, "redirect_addr: missing public address");
3522         StrToAddr(*av, &r->paddr);
3523         INC_ARGCV();
3524
3525         /* Setup LSNAT server pool. */
3526         if (sep) {
3527                 sep = strtok(tmp_spool_buf, ",");
3528                 while (sep != NULL) {
3529                         tmp = (struct cfg_spool *)spool_buf;
3530                         if (len < SOF_SPOOL)
3531                                 goto nospace;
3532                         len -= SOF_SPOOL;
3533                         space += SOF_SPOOL;
3534                         StrToAddr(sep, &tmp->addr);
3535                         tmp->port = ~0;
3536                         r->spool_cnt++;
3537                         /* Point to the next possible cfg_spool. */
3538                         spool_buf = &spool_buf[SOF_SPOOL];
3539                         sep = strtok(NULL, ",");
3540                 }
3541         }
3542         return(space);
3543 nospace:
3544         errx(EX_DATAERR, "redirect_addr: buf is too small\n");
3545 }
3546
3547 static int
3548 setup_redir_port(char *spool_buf, int len,
3549                  int *_ac, char ***_av)
3550 {
3551         char **av, *sep, *protoName;
3552         char tmp_spool_buf[NAT_BUF_LEN];
3553         int ac, space, lsnat;
3554         struct cfg_redir *r;
3555         struct cfg_spool *tmp;
3556         u_short numLocalPorts;
3557         port_range portRange;
3558
3559         av = *_av;
3560         ac = *_ac;
3561         space = 0;
3562         lsnat = 0;
3563         numLocalPorts = 0;
3564
3565         if (len >= SOF_REDIR) {
3566                 r = (struct cfg_redir *)spool_buf;
3567                 /* Skip cfg_redir at beginning of buf. */
3568                 spool_buf = &spool_buf[SOF_REDIR];
3569                 space = SOF_REDIR;
3570                 len -= SOF_REDIR;
3571         } else
3572                 goto nospace;
3573         r->mode = REDIR_PORT;
3574         /*
3575          * Extract protocol.
3576          */
3577         if (ac == 0)
3578                 errx (EX_DATAERR, "redirect_port: missing protocol");
3579         r->proto = StrToProto(*av);
3580         protoName = *av;
3581         INC_ARGCV();
3582
3583         /*
3584          * Extract local address.
3585          */
3586         if (ac == 0)
3587                 errx (EX_DATAERR, "redirect_port: missing local address");
3588
3589         sep = strchr(*av, ',');
3590         /* LSNAT redirection syntax. */
3591         if (sep) {
3592                 r->laddr.s_addr = INADDR_NONE;
3593                 r->lport = ~0;
3594                 numLocalPorts = 1;
3595                 /* Preserve av, copy spool servers to tmp_spool_buf. */
3596                 strncpy(tmp_spool_buf, *av, strlen(*av)+1);
3597                 lsnat = 1;
3598         } else {
3599                 if (StrToAddrAndPortRange (*av, &r->laddr, protoName,
3600                     &portRange) != 0)
3601                         errx(EX_DATAERR, "redirect_port:"
3602                             "invalid local port range");
3603
3604                 r->lport = GETLOPORT(portRange);
3605                 numLocalPorts = GETNUMPORTS(portRange);
3606         }
3607         INC_ARGCV();
3608
3609         /*
3610          * Extract public port and optionally address.
3611          */
3612         if (ac == 0)
3613                 errx (EX_DATAERR, "redirect_port: missing public port");
3614
3615         sep = strchr (*av, ':');
3616         if (sep) {
3617                 if (StrToAddrAndPortRange (*av, &r->paddr, protoName,
3618                     &portRange) != 0)
3619                         errx(EX_DATAERR, "redirect_port:"
3620                             "invalid public port range");
3621         } else {
3622                 r->paddr.s_addr = INADDR_ANY;
3623                 if (StrToPortRange (*av, protoName, &portRange) != 0)
3624                         errx(EX_DATAERR, "redirect_port:"
3625                             "invalid public port range");
3626         }
3627
3628         r->pport = GETLOPORT(portRange);
3629         r->pport_cnt = GETNUMPORTS(portRange);
3630         INC_ARGCV();
3631
3632         /*
3633          * Extract remote address and optionally port.
3634          */
3635         /*
3636          * NB: isalpha(**av) => we've to check that next parameter is really an
3637          * option for this redirect entry, else stop here processing arg[cv].
3638          */
3639         if (ac != 0 && !isalpha(**av)) {
3640                 sep = strchr (*av, ':');
3641                 if (sep) {
3642                         if (StrToAddrAndPortRange (*av, &r->raddr, protoName,
3643                             &portRange) != 0)
3644                                 errx(EX_DATAERR, "redirect_port:"
3645                                     "invalid remote port range");
3646                 } else {
3647                         SETLOPORT(portRange, 0);
3648                         SETNUMPORTS(portRange, 1);
3649                         StrToAddr (*av, &r->raddr);
3650                 }
3651                 INC_ARGCV();
3652         } else {
3653                 SETLOPORT(portRange, 0);
3654                 SETNUMPORTS(portRange, 1);
3655                 r->raddr.s_addr = INADDR_ANY;
3656         }
3657         r->rport = GETLOPORT(portRange);
3658         r->rport_cnt = GETNUMPORTS(portRange);
3659
3660         /*
3661          * Make sure port ranges match up, then add the redirect ports.
3662          */
3663         if (numLocalPorts != r->pport_cnt)
3664                 errx(EX_DATAERR, "redirect_port:"
3665                     "port ranges must be equal in size");
3666
3667         /* Remote port range is allowed to be '0' which means all ports. */
3668         if (r->rport_cnt != numLocalPorts &&
3669             (r->rport_cnt != 1 || r->rport != 0))
3670                 errx(EX_DATAERR, "redirect_port: remote port must"
3671                     "be 0 or equal to local port range in size");
3672
3673         /*
3674          * Setup LSNAT server pool.
3675          */
3676         if (lsnat) {
3677                 sep = strtok(tmp_spool_buf, ",");
3678                 while (sep != NULL) {
3679                         tmp = (struct cfg_spool *)spool_buf;
3680                         if (len < SOF_SPOOL)
3681                                 goto nospace;
3682                         len -= SOF_SPOOL;
3683                         space += SOF_SPOOL;
3684                         if (StrToAddrAndPortRange(sep, &tmp->addr, protoName,
3685                             &portRange) != 0)
3686                                 errx(EX_DATAERR, "redirect_port:"
3687                                     "invalid local port range");
3688                         if (GETNUMPORTS(portRange) != 1)
3689                                 errx(EX_DATAERR, "redirect_port: local port"
3690                                     "must be single in this context");
3691                         tmp->port = GETLOPORT(portRange);
3692                         r->spool_cnt++;
3693                         /* Point to the next possible cfg_spool. */
3694                         spool_buf = &spool_buf[SOF_SPOOL];
3695                         sep = strtok(NULL, ",");
3696                 }
3697         }
3698         return (space);
3699 nospace:
3700         errx(EX_DATAERR, "redirect_port: buf is too small\n");
3701 }
3702
3703 static int
3704 setup_redir_proto(char *spool_buf, int len,
3705                  int *_ac, char ***_av)
3706 {
3707         char **av;
3708         int ac, space;
3709         struct protoent *protoent;
3710         struct cfg_redir *r;
3711
3712         av = *_av;
3713         ac = *_ac;
3714         if (len >= SOF_REDIR) {
3715                 r = (struct cfg_redir *)spool_buf;
3716                 /* Skip cfg_redir at beginning of buf. */
3717                 spool_buf = &spool_buf[SOF_REDIR];
3718                 space = SOF_REDIR;
3719                 len -= SOF_REDIR;
3720         } else
3721                 goto nospace;
3722         r->mode = REDIR_PROTO;
3723         /*
3724          * Extract protocol.
3725          */
3726         if (ac == 0)
3727                 errx(EX_DATAERR, "redirect_proto: missing protocol");
3728
3729         protoent = getprotobyname(*av);
3730         if (protoent == NULL)
3731                 errx(EX_DATAERR, "redirect_proto: unknown protocol %s", *av);
3732         else
3733                 r->proto = protoent->p_proto;
3734
3735         INC_ARGCV();
3736
3737         /*
3738          * Extract local address.
3739          */
3740         if (ac == 0)
3741                 errx(EX_DATAERR, "redirect_proto: missing local address");
3742         else
3743                 StrToAddr(*av, &r->laddr);
3744
3745         INC_ARGCV();
3746
3747         /*
3748          * Extract optional public address.
3749          */
3750         if (ac == 0) {
3751                 r->paddr.s_addr = INADDR_ANY;
3752                 r->raddr.s_addr = INADDR_ANY;
3753         } else {
3754                 /* see above in setup_redir_port() */
3755                 if (!isalpha(**av)) {
3756                         StrToAddr(*av, &r->paddr);
3757                         INC_ARGCV();
3758
3759                         /*
3760                          * Extract optional remote address.
3761                          */
3762                         /* see above in setup_redir_port() */
3763                         if (ac!=0 && !isalpha(**av)) {
3764                                 StrToAddr(*av, &r->raddr);
3765                                 INC_ARGCV();
3766                         }
3767                 }
3768         }
3769         return (space);
3770 nospace:
3771         errx(EX_DATAERR, "redirect_proto: buf is too small\n");
3772 }
3773
3774 static void
3775 print_nat_config(unsigned char *buf)
3776 {
3777         struct cfg_nat *n;
3778         int i, cnt, flag, off;
3779         struct cfg_redir *t;
3780         struct cfg_spool *s;
3781         struct protoent *p;
3782
3783         n = (struct cfg_nat *)buf;
3784         flag = 1;
3785         off  = sizeof(*n);
3786         printf("ipfw nat %u config", n->id);
3787         if (strlen(n->if_name) != 0)
3788                 printf(" if %s", n->if_name);
3789         else if (n->ip.s_addr != 0)
3790                 printf(" ip %s", inet_ntoa(n->ip));
3791         while (n->mode != 0) {
3792                 if (n->mode & PKT_ALIAS_LOG) {
3793                         printf(" log");
3794                         n->mode &= ~PKT_ALIAS_LOG;
3795                 } else if (n->mode & PKT_ALIAS_DENY_INCOMING) {
3796                         printf(" deny_in");
3797                         n->mode &= ~PKT_ALIAS_DENY_INCOMING;
3798                 } else if (n->mode & PKT_ALIAS_SAME_PORTS) {
3799                         printf(" same_ports");
3800                         n->mode &= ~PKT_ALIAS_SAME_PORTS;
3801                 } else if (n->mode & PKT_ALIAS_UNREGISTERED_ONLY) {
3802                         printf(" unreg_only");
3803                         n->mode &= ~PKT_ALIAS_UNREGISTERED_ONLY;
3804                 } else if (n->mode & PKT_ALIAS_RESET_ON_ADDR_CHANGE) {
3805                         printf(" reset");
3806                         n->mode &= ~PKT_ALIAS_RESET_ON_ADDR_CHANGE;
3807                 } else if (n->mode & PKT_ALIAS_REVERSE) {
3808                         printf(" reverse");
3809                         n->mode &= ~PKT_ALIAS_REVERSE;
3810                 } else if (n->mode & PKT_ALIAS_PROXY_ONLY) {
3811                         printf(" proxy_only");
3812                         n->mode &= ~PKT_ALIAS_PROXY_ONLY;
3813                 }
3814         }
3815         /* Print all the redirect's data configuration. */
3816         for (cnt = 0; cnt < n->redir_cnt; cnt++) {
3817                 t = (struct cfg_redir *)&buf[off];
3818                 off += SOF_REDIR;
3819                 switch (t->mode) {
3820                 case REDIR_ADDR:
3821                         printf(" redirect_addr");
3822                         if (t->spool_cnt == 0)
3823                                 printf(" %s", inet_ntoa(t->laddr));
3824                         else
3825                                 for (i = 0; i < t->spool_cnt; i++) {
3826                                         s = (struct cfg_spool *)&buf[off];
3827                                         if (i)
3828                                                 printf(",");
3829                                         else
3830                                                 printf(" ");
3831                                         printf("%s", inet_ntoa(s->addr));
3832                                         off += SOF_SPOOL;
3833                                 }
3834                         printf(" %s", inet_ntoa(t->paddr));
3835                         break;
3836                 case REDIR_PORT:
3837                         p = getprotobynumber(t->proto);
3838                         printf(" redirect_port %s ", p->p_name);
3839                         if (!t->spool_cnt) {
3840                                 printf("%s:%u", inet_ntoa(t->laddr), t->lport);
3841                                 if (t->pport_cnt > 1)
3842                                         printf("-%u", t->lport +
3843                                             t->pport_cnt - 1);
3844                         } else
3845                                 for (i=0; i < t->spool_cnt; i++) {
3846                                         s = (struct cfg_spool *)&buf[off];
3847                                         if (i)
3848                                                 printf(",");
3849                                         printf("%s:%u", inet_ntoa(s->addr),
3850                                             s->port);
3851                                         off += SOF_SPOOL;
3852                                 }
3853
3854                         printf(" ");
3855                         if (t->paddr.s_addr)
3856                                 printf("%s:", inet_ntoa(t->paddr));
3857                         printf("%u", t->pport);
3858                         if (!t->spool_cnt && t->pport_cnt > 1)
3859                                 printf("-%u", t->pport + t->pport_cnt - 1);
3860
3861                         if (t->raddr.s_addr) {
3862                                 printf(" %s", inet_ntoa(t->raddr));
3863                                 if (t->rport) {
3864                                         printf(":%u", t->rport);
3865                                         if (!t->spool_cnt && t->rport_cnt > 1)
3866                                                 printf("-%u", t->rport +
3867                                                     t->rport_cnt - 1);
3868                                 }
3869                         }
3870                         break;
3871                 case REDIR_PROTO:
3872                         p = getprotobynumber(t->proto);
3873                         printf(" redirect_proto %s %s", p->p_name,
3874                             inet_ntoa(t->laddr));
3875                         if (t->paddr.s_addr != 0) {
3876                                 printf(" %s", inet_ntoa(t->paddr));
3877                                 if (t->raddr.s_addr)
3878                                         printf(" %s", inet_ntoa(t->raddr));
3879                         }
3880                         break;
3881                 default:
3882                         errx(EX_DATAERR, "unknown redir mode");
3883                         break;
3884                 }
3885         }
3886         printf("\n");
3887 }
3888
3889 void
3890 ipfw_config_nat(int ac, char **av)
3891 {
3892         struct cfg_nat *n;              /* Nat instance configuration. */
3893         int i, len, off, tok;
3894         char *id, buf[NAT_BUF_LEN];     /* Buffer for serialized data. */
3895
3896         len = NAT_BUF_LEN;
3897         /* Offset in buf: save space for n at the beginning. */
3898         off = sizeof(*n);
3899         memset(buf, 0, sizeof(buf));
3900         n = (struct cfg_nat *)buf;
3901
3902         av++; ac--;
3903         /* Nat id. */
3904         if (ac && isdigit(**av)) {
3905                 id = *av;
3906                 i = atoi(*av);
3907                 ac--; av++;
3908                 n->id = i;
3909         } else
3910                 errx(EX_DATAERR, "missing nat id");
3911         if (ac == 0)
3912                 errx(EX_DATAERR, "missing option");
3913
3914         while (ac > 0) {
3915                 tok = match_token(nat_params, *av);
3916                 ac--; av++;
3917                 switch (tok) {
3918                 case TOK_IP:
3919                         if (ac == 0)
3920                                 errx(EX_DATAERR, "missing option");
3921                         if (!inet_aton(av[0], &(n->ip)))
3922                                 errx(EX_DATAERR, "bad ip address ``%s''",
3923                                     av[0]);
3924                         ac--; av++;
3925                         break;
3926                 case TOK_IF:
3927                         if (ac == 0)
3928                                 errx(EX_DATAERR, "missing option");
3929                         set_addr_dynamic(av[0], n);
3930                         ac--; av++;
3931                         break;
3932                 case TOK_ALOG:
3933                         n->mode |= PKT_ALIAS_LOG;
3934                         break;
3935                 case TOK_DENY_INC:
3936                         n->mode |= PKT_ALIAS_DENY_INCOMING;
3937                         break;
3938                 case TOK_SAME_PORTS:
3939                         n->mode |= PKT_ALIAS_SAME_PORTS;
3940                         break;
3941                 case TOK_UNREG_ONLY:
3942                         n->mode |= PKT_ALIAS_UNREGISTERED_ONLY;
3943                         break;
3944                 case TOK_RESET_ADDR:
3945                         n->mode |= PKT_ALIAS_RESET_ON_ADDR_CHANGE;
3946                         break;
3947                 case TOK_ALIAS_REV:
3948                         n->mode |= PKT_ALIAS_REVERSE;
3949                         break;
3950                 case TOK_PROXY_ONLY:
3951                         n->mode |= PKT_ALIAS_PROXY_ONLY;
3952                         break;
3953                         /*
3954                          * All the setup_redir_* functions work directly in the final
3955                          * buffer, see above for details.
3956                          */
3957                 case TOK_REDIR_ADDR:
3958                 case TOK_REDIR_PORT:
3959                 case TOK_REDIR_PROTO:
3960                         switch (tok) {
3961                         case TOK_REDIR_ADDR:
3962                                 i = setup_redir_addr(&buf[off], len, &ac, &av);
3963                                 break;
3964                         case TOK_REDIR_PORT:
3965                                 i = setup_redir_port(&buf[off], len, &ac, &av);
3966                                 break;
3967                         case TOK_REDIR_PROTO:
3968                                 i = setup_redir_proto(&buf[off], len, &ac, &av);
3969                                 break;
3970                         }
3971                         n->redir_cnt++;
3972                         off += i;
3973                         len -= i;
3974                         break;
3975                 default:
3976                         errx(EX_DATAERR, "unrecognised option ``%s''", av[-1]);
3977                 }
3978         }
3979
3980         i = do_cmd(IP_FW_NAT_CFG, buf, off);
3981         if (i)
3982                 err(1, "setsockopt(%s)", "IP_FW_NAT_CFG");
3983
3984         if (!co.do_quiet) {
3985                 /* After every modification, we show the resultant rule. */
3986                 int _ac = 3;
3987                 char *_av[] = {"show", "config", id};
3988                 ipfw_show_nat(_ac, _av);
3989         }
3990 }
3991
3992 void
3993 ipfw_config_pipe(int ac, char **av)
3994 {
3995         struct dn_pipe p;
3996         int i;
3997         char *end;
3998         void *par = NULL;
3999
4000         memset(&p, 0, sizeof p);
4001
4002         av++; ac--;
4003         /* Pipe number */
4004         if (ac && isdigit(**av)) {
4005                 i = atoi(*av); av++; ac--;
4006                 if (co.do_pipe == 1)
4007                         p.pipe_nr = i;
4008                 else
4009                         p.fs.fs_nr = i;
4010         }
4011         while (ac > 0) {
4012                 double d;
4013                 int tok = match_token(dummynet_params, *av);
4014                 ac--; av++;
4015
4016                 switch(tok) {
4017                 case TOK_NOERROR:
4018                         p.fs.flags_fs |= DN_NOERROR;
4019                         break;
4020
4021                 case TOK_PLR:
4022                         NEED1("plr needs argument 0..1\n");
4023                         d = strtod(av[0], NULL);
4024                         if (d > 1)
4025                                 d = 1;
4026                         else if (d < 0)
4027                                 d = 0;
4028                         p.fs.plr = (int)(d*0x7fffffff);
4029                         ac--; av++;
4030                         break;
4031
4032                 case TOK_QUEUE:
4033                         NEED1("queue needs queue size\n");
4034                         end = NULL;
4035                         p.fs.qsize = strtoul(av[0], &end, 0);
4036                         if (*end == 'K' || *end == 'k') {
4037                                 p.fs.flags_fs |= DN_QSIZE_IS_BYTES;
4038                                 p.fs.qsize *= 1024;
4039                         } else if (*end == 'B' ||
4040                             _substrcmp2(end, "by", "bytes") == 0) {
4041                                 p.fs.flags_fs |= DN_QSIZE_IS_BYTES;
4042                         }
4043                         ac--; av++;
4044                         break;
4045
4046                 case TOK_BUCKETS:
4047                         NEED1("buckets needs argument\n");
4048                         p.fs.rq_size = strtoul(av[0], NULL, 0);
4049                         ac--; av++;
4050                         break;
4051
4052                 case TOK_MASK:
4053                         NEED1("mask needs mask specifier\n");
4054                         /*
4055                          * per-flow queue, mask is dst_ip, dst_port,
4056                          * src_ip, src_port, proto measured in bits
4057                          */
4058                         par = NULL;
4059
4060                         bzero(&p.fs.flow_mask, sizeof(p.fs.flow_mask));
4061                         end = NULL;
4062
4063                         while (ac >= 1) {
4064                             uint32_t *p32 = NULL;
4065                             uint16_t *p16 = NULL;
4066                             uint32_t *p20 = NULL;
4067                             struct in6_addr *pa6 = NULL;
4068                             uint32_t a;
4069
4070                             tok = match_token(dummynet_params, *av);
4071                             ac--; av++;
4072                             switch(tok) {
4073                             case TOK_ALL:
4074                                     /*
4075                                      * special case, all bits significant
4076                                      */
4077                                     p.fs.flow_mask.dst_ip = ~0;
4078                                     p.fs.flow_mask.src_ip = ~0;
4079                                     p.fs.flow_mask.dst_port = ~0;
4080                                     p.fs.flow_mask.src_port = ~0;
4081                                     p.fs.flow_mask.proto = ~0;
4082                                     n2mask(&(p.fs.flow_mask.dst_ip6), 128);
4083                                     n2mask(&(p.fs.flow_mask.src_ip6), 128);
4084                                     p.fs.flow_mask.flow_id6 = ~0;
4085                                     p.fs.flags_fs |= DN_HAVE_FLOW_MASK;
4086                                     goto end_mask;
4087
4088                             case TOK_DSTIP:
4089                                     p32 = &p.fs.flow_mask.dst_ip;
4090                                     break;
4091
4092                             case TOK_SRCIP:
4093                                     p32 = &p.fs.flow_mask.src_ip;
4094                                     break;
4095
4096                             case TOK_DSTIP6:
4097                                     pa6 = &(p.fs.flow_mask.dst_ip6);
4098                                     break;
4099
4100                             case TOK_SRCIP6:
4101                                     pa6 = &(p.fs.flow_mask.src_ip6);
4102                                     break;
4103
4104                             case TOK_FLOWID:
4105                                     p20 = &p.fs.flow_mask.flow_id6;
4106                                     break;
4107
4108                             case TOK_DSTPORT:
4109                                     p16 = &p.fs.flow_mask.dst_port;
4110                                     break;
4111
4112                             case TOK_SRCPORT:
4113                                     p16 = &p.fs.flow_mask.src_port;
4114                                     break;
4115
4116                             case TOK_PROTO:
4117                                     break;
4118
4119                             default:
4120                                     ac++; av--; /* backtrack */
4121                                     goto end_mask;
4122                             }
4123                             if (ac < 1)
4124                                     errx(EX_USAGE, "mask: value missing");
4125                             if (*av[0] == '/') {
4126                                     a = strtoul(av[0]+1, &end, 0);
4127                                     if (pa6 == NULL)
4128                                             a = (a == 32) ? ~0 : (1 << a) - 1;
4129                             } else
4130                                     a = strtoul(av[0], &end, 0);
4131                             if (p32 != NULL)
4132                                     *p32 = a;
4133                             else if (p16 != NULL) {
4134                                     if (a > 0xFFFF)
4135                                             errx(EX_DATAERR,
4136                                                 "port mask must be 16 bit");
4137                                     *p16 = (uint16_t)a;
4138                             } else if (p20 != NULL) {
4139                                     if (a > 0xfffff)
4140                                         errx(EX_DATAERR,
4141                                             "flow_id mask must be 20 bit");
4142                                     *p20 = (uint32_t)a;
4143                             } else if (pa6 != NULL) {
4144                                     if (a > 128)
4145                                         errx(EX_DATAERR,
4146                                             "in6addr invalid mask len");
4147                                     else
4148                                         n2mask(pa6, a);
4149                             } else {
4150                                     if (a > 0xFF)
4151                                             errx(EX_DATAERR,
4152                                                 "proto mask must be 8 bit");
4153                                     p.fs.flow_mask.proto = (uint8_t)a;
4154                             }
4155                             if (a != 0)
4156                                     p.fs.flags_fs |= DN_HAVE_FLOW_MASK;
4157                             ac--; av++;
4158                         } /* end while, config masks */
4159 end_mask:
4160                         break;
4161
4162                 case TOK_RED:
4163                 case TOK_GRED:
4164                         NEED1("red/gred needs w_q/min_th/max_th/max_p\n");
4165                         p.fs.flags_fs |= DN_IS_RED;
4166                         if (tok == TOK_GRED)
4167                                 p.fs.flags_fs |= DN_IS_GENTLE_RED;
4168                         /*
4169                          * the format for parameters is w_q/min_th/max_th/max_p
4170                          */
4171                         if ((end = strsep(&av[0], "/"))) {
4172                             double w_q = strtod(end, NULL);
4173                             if (w_q > 1 || w_q <= 0)
4174                                 errx(EX_DATAERR, "0 < w_q <= 1");
4175                             p.fs.w_q = (int) (w_q * (1 << SCALE_RED));
4176                         }
4177                         if ((end = strsep(&av[0], "/"))) {
4178                             p.fs.min_th = strtoul(end, &end, 0);
4179                             if (*end == 'K' || *end == 'k')
4180                                 p.fs.min_th *= 1024;
4181                         }
4182                         if ((end = strsep(&av[0], "/"))) {
4183                             p.fs.max_th = strtoul(end, &end, 0);
4184                             if (*end == 'K' || *end == 'k')
4185                                 p.fs.max_th *= 1024;
4186                         }
4187                         if ((end = strsep(&av[0], "/"))) {
4188                             double max_p = strtod(end, NULL);
4189                             if (max_p > 1 || max_p <= 0)
4190                                 errx(EX_DATAERR, "0 < max_p <= 1");
4191                             p.fs.max_p = (int)(max_p * (1 << SCALE_RED));
4192                         }
4193                         ac--; av++;
4194                         break;
4195
4196                 case TOK_DROPTAIL:
4197                         p.fs.flags_fs &= ~(DN_IS_RED|DN_IS_GENTLE_RED);
4198                         break;
4199
4200                 case TOK_BW:
4201                         NEED1("bw needs bandwidth or interface\n");
4202                         if (co.do_pipe != 1)
4203                             errx(EX_DATAERR, "bandwidth only valid for pipes");
4204                         /*
4205                          * set clocking interface or bandwidth value
4206                          */
4207                         if (av[0][0] >= 'a' && av[0][0] <= 'z') {
4208                             int l = sizeof(p.if_name)-1;
4209                             /* interface name */
4210                             strncpy(p.if_name, av[0], l);
4211                             p.if_name[l] = '\0';
4212                             p.bandwidth = 0;
4213                         } else {
4214                             p.if_name[0] = '\0';
4215                             p.bandwidth = strtoul(av[0], &end, 0);
4216                             if (*end == 'K' || *end == 'k') {
4217                                 end++;
4218                                 p.bandwidth *= 1000;
4219                             } else if (*end == 'M') {
4220                                 end++;
4221                                 p.bandwidth *= 1000000;
4222                             }
4223                             if ((*end == 'B' &&
4224                                   _substrcmp2(end, "Bi", "Bit/s") != 0) ||
4225                                 _substrcmp2(end, "by", "bytes") == 0)
4226                                 p.bandwidth *= 8;
4227                             if (p.bandwidth < 0)
4228                                 errx(EX_DATAERR, "bandwidth too large");
4229                         }
4230                         ac--; av++;
4231                         break;
4232
4233                 case TOK_DELAY:
4234                         if (co.do_pipe != 1)
4235                                 errx(EX_DATAERR, "delay only valid for pipes");
4236                         NEED1("delay needs argument 0..10000ms\n");
4237                         p.delay = strtoul(av[0], NULL, 0);
4238                         ac--; av++;
4239                         break;
4240
4241                 case TOK_WEIGHT:
4242                         if (co.do_pipe == 1)
4243                                 errx(EX_DATAERR,"weight only valid for queues");
4244                         NEED1("weight needs argument 0..100\n");
4245                         p.fs.weight = strtoul(av[0], &end, 0);
4246                         ac--; av++;
4247                         break;
4248
4249                 case TOK_PIPE:
4250                         if (co.do_pipe == 1)
4251                                 errx(EX_DATAERR,"pipe only valid for queues");
4252                         NEED1("pipe needs pipe_number\n");
4253                         p.fs.parent_nr = strtoul(av[0], &end, 0);
4254                         ac--; av++;
4255                         break;
4256
4257                 default:
4258                         errx(EX_DATAERR, "unrecognised option ``%s''", av[-1]);
4259                 }
4260         }
4261         if (co.do_pipe == 1) {
4262                 if (p.pipe_nr == 0)
4263                         errx(EX_DATAERR, "pipe_nr must be > 0");
4264                 if (p.delay > 10000)
4265                         errx(EX_DATAERR, "delay must be < 10000");
4266         } else { /* co.do_pipe == 2, queue */
4267                 if (p.fs.parent_nr == 0)
4268                         errx(EX_DATAERR, "pipe must be > 0");
4269                 if (p.fs.weight >100)
4270                         errx(EX_DATAERR, "weight must be <= 100");
4271         }
4272         if (p.fs.flags_fs & DN_QSIZE_IS_BYTES) {
4273                 size_t len;
4274                 long limit;
4275
4276                 len = sizeof(limit);
4277                 if (sysctlbyname("net.inet.ip.dummynet.pipe_byte_limit",
4278                         &limit, &len, NULL, 0) == -1)
4279                         limit = 1024*1024;
4280                 if (p.fs.qsize > limit)
4281                         errx(EX_DATAERR, "queue size must be < %ldB", limit);
4282         } else {
4283                 size_t len;
4284                 long limit;
4285
4286                 len = sizeof(limit);
4287                 if (sysctlbyname("net.inet.ip.dummynet.pipe_slot_limit",
4288                         &limit, &len, NULL, 0) == -1)
4289                         limit = 100;
4290                 if (p.fs.qsize > limit)
4291                         errx(EX_DATAERR, "2 <= queue size <= %ld", limit);
4292         }
4293         if (p.fs.flags_fs & DN_IS_RED) {
4294                 size_t len;
4295                 int lookup_depth, avg_pkt_size;
4296                 double s, idle, weight, w_q;
4297                 struct clockinfo ck;
4298                 int t;
4299
4300                 if (p.fs.min_th >= p.fs.max_th)
4301                     errx(EX_DATAERR, "min_th %d must be < than max_th %d",
4302                         p.fs.min_th, p.fs.max_th);
4303                 if (p.fs.max_th == 0)
4304                     errx(EX_DATAERR, "max_th must be > 0");
4305
4306                 len = sizeof(int);
4307                 if (sysctlbyname("net.inet.ip.dummynet.red_lookup_depth",
4308                         &lookup_depth, &len, NULL, 0) == -1)
4309                     errx(1, "sysctlbyname(\"%s\")",
4310                         "net.inet.ip.dummynet.red_lookup_depth");
4311                 if (lookup_depth == 0)
4312                     errx(EX_DATAERR, "net.inet.ip.dummynet.red_lookup_depth"
4313                         " must be greater than zero");
4314
4315                 len = sizeof(int);
4316                 if (sysctlbyname("net.inet.ip.dummynet.red_avg_pkt_size",
4317                         &avg_pkt_size, &len, NULL, 0) == -1)
4318
4319                     errx(1, "sysctlbyname(\"%s\")",
4320                         "net.inet.ip.dummynet.red_avg_pkt_size");
4321                 if (avg_pkt_size == 0)
4322                         errx(EX_DATAERR,
4323                             "net.inet.ip.dummynet.red_avg_pkt_size must"
4324                             " be greater than zero");
4325
4326                 len = sizeof(struct clockinfo);
4327                 if (sysctlbyname("kern.clockrate", &ck, &len, NULL, 0) == -1)
4328                         errx(1, "sysctlbyname(\"%s\")", "kern.clockrate");
4329
4330                 /*
4331                  * Ticks needed for sending a medium-sized packet.
4332                  * Unfortunately, when we are configuring a WF2Q+ queue, we
4333                  * do not have bandwidth information, because that is stored
4334                  * in the parent pipe, and also we have multiple queues
4335                  * competing for it. So we set s=0, which is not very
4336                  * correct. But on the other hand, why do we want RED with
4337                  * WF2Q+ ?
4338                  */
4339                 if (p.bandwidth==0) /* this is a WF2Q+ queue */
4340                         s = 0;
4341                 else
4342                         s = (double)ck.hz * avg_pkt_size * 8 / p.bandwidth;
4343
4344                 /*
4345                  * max idle time (in ticks) before avg queue size becomes 0.
4346                  * NOTA:  (3/w_q) is approx the value x so that
4347                  * (1-w_q)^x < 10^-3.
4348                  */
4349                 w_q = ((double)p.fs.w_q) / (1 << SCALE_RED);
4350                 idle = s * 3. / w_q;
4351                 p.fs.lookup_step = (int)idle / lookup_depth;
4352                 if (!p.fs.lookup_step)
4353                         p.fs.lookup_step = 1;
4354                 weight = 1 - w_q;
4355                 for (t = p.fs.lookup_step; t > 1; --t)
4356                         weight *= 1 - w_q;
4357                 p.fs.lookup_weight = (int)(weight * (1 << SCALE_RED));
4358         }
4359         i = do_cmd(IP_DUMMYNET_CONFIGURE, &p, sizeof p);
4360         if (i)
4361                 err(1, "setsockopt(%s)", "IP_DUMMYNET_CONFIGURE");
4362 }
4363
4364 static void
4365 get_mac_addr_mask(const char *p, uint8_t *addr, uint8_t *mask)
4366 {
4367         int i, l;
4368         char *ap, *ptr, *optr;
4369         struct ether_addr *mac;
4370         const char *macset = "0123456789abcdefABCDEF:";
4371
4372         if (strcmp(p, "any") == 0) {
4373                 for (i = 0; i < ETHER_ADDR_LEN; i++)
4374                         addr[i] = mask[i] = 0;
4375                 return;
4376         }
4377
4378         optr = ptr = strdup(p);
4379         if ((ap = strsep(&ptr, "&/")) != NULL && *ap != 0) {
4380                 l = strlen(ap);
4381                 if (strspn(ap, macset) != l || (mac = ether_aton(ap)) == NULL)
4382                         errx(EX_DATAERR, "Incorrect MAC address");
4383                 bcopy(mac, addr, ETHER_ADDR_LEN);
4384         } else
4385                 errx(EX_DATAERR, "Incorrect MAC address");
4386
4387         if (ptr != NULL) { /* we have mask? */
4388                 if (p[ptr - optr - 1] == '/') { /* mask len */
4389                         l = strtol(ptr, &ap, 10);
4390                         if (*ap != 0 || l > ETHER_ADDR_LEN * 8 || l < 0)
4391                                 errx(EX_DATAERR, "Incorrect mask length");
4392                         for (i = 0; l > 0 && i < ETHER_ADDR_LEN; l -= 8, i++)
4393                                 mask[i] = (l >= 8) ? 0xff: (~0) << (8 - l);
4394                 } else { /* mask */
4395                         l = strlen(ptr);
4396                         if (strspn(ptr, macset) != l ||
4397                             (mac = ether_aton(ptr)) == NULL)
4398                                 errx(EX_DATAERR, "Incorrect mask");
4399                         bcopy(mac, mask, ETHER_ADDR_LEN);
4400                 }
4401         } else { /* default mask: ff:ff:ff:ff:ff:ff */
4402                 for (i = 0; i < ETHER_ADDR_LEN; i++)
4403                         mask[i] = 0xff;
4404         }
4405         for (i = 0; i < ETHER_ADDR_LEN; i++)
4406                 addr[i] &= mask[i];
4407
4408         free(optr);
4409 }
4410
4411 /*
4412  * helper function, updates the pointer to cmd with the length
4413  * of the current command, and also cleans up the first word of
4414  * the new command in case it has been clobbered before.
4415  */
4416 static ipfw_insn *
4417 next_cmd(ipfw_insn *cmd)
4418 {
4419         cmd += F_LEN(cmd);
4420         bzero(cmd, sizeof(*cmd));
4421         return cmd;
4422 }
4423
4424 /*
4425  * Takes arguments and copies them into a comment
4426  */
4427 static void
4428 fill_comment(ipfw_insn *cmd, int ac, char **av)
4429 {
4430         int i, l;
4431         char *p = (char *)(cmd + 1);
4432
4433         cmd->opcode = O_NOP;
4434         cmd->len =  (cmd->len & (F_NOT | F_OR));
4435
4436         /* Compute length of comment string. */
4437         for (i = 0, l = 0; i < ac; i++)
4438                 l += strlen(av[i]) + 1;
4439         if (l == 0)
4440                 return;
4441         if (l > 84)
4442                 errx(EX_DATAERR,
4443                     "comment too long (max 80 chars)");
4444         l = 1 + (l+3)/4;
4445         cmd->len =  (cmd->len & (F_NOT | F_OR)) | l;
4446         for (i = 0; i < ac; i++) {
4447                 strcpy(p, av[i]);
4448                 p += strlen(av[i]);
4449                 *p++ = ' ';
4450         }
4451         *(--p) = '\0';
4452 }
4453
4454 /*
4455  * A function to fill simple commands of size 1.
4456  * Existing flags are preserved.
4457  */
4458 static void
4459 fill_cmd(ipfw_insn *cmd, enum ipfw_opcodes opcode, int flags, uint16_t arg)
4460 {
4461         cmd->opcode = opcode;
4462         cmd->len =  ((cmd->len | flags) & (F_NOT | F_OR)) | 1;
4463         cmd->arg1 = arg;
4464 }
4465
4466 /*
4467  * Fetch and add the MAC address and type, with masks. This generates one or
4468  * two microinstructions, and returns the pointer to the last one.
4469  */
4470 static ipfw_insn *
4471 add_mac(ipfw_insn *cmd, int ac, char *av[])
4472 {
4473         ipfw_insn_mac *mac;
4474
4475         if (ac < 2)
4476                 errx(EX_DATAERR, "MAC dst src");
4477
4478         cmd->opcode = O_MACADDR2;
4479         cmd->len = (cmd->len & (F_NOT | F_OR)) | F_INSN_SIZE(ipfw_insn_mac);
4480
4481         mac = (ipfw_insn_mac *)cmd;
4482         get_mac_addr_mask(av[0], mac->addr, mac->mask); /* dst */
4483         get_mac_addr_mask(av[1], &(mac->addr[ETHER_ADDR_LEN]),
4484             &(mac->mask[ETHER_ADDR_LEN])); /* src */
4485         return cmd;
4486 }
4487
4488 static ipfw_insn *
4489 add_mactype(ipfw_insn *cmd, int ac, char *av)
4490 {
4491         if (ac < 1)
4492                 errx(EX_DATAERR, "missing MAC type");
4493         if (strcmp(av, "any") != 0) { /* we have a non-null type */
4494                 fill_newports((ipfw_insn_u16 *)cmd, av, IPPROTO_ETHERTYPE);
4495                 cmd->opcode = O_MAC_TYPE;
4496                 return cmd;
4497         } else
4498                 return NULL;
4499 }
4500
4501 static ipfw_insn *
4502 add_proto0(ipfw_insn *cmd, char *av, u_char *protop)
4503 {
4504         struct protoent *pe;
4505         char *ep;
4506         int proto;
4507
4508         proto = strtol(av, &ep, 10);
4509         if (*ep != '\0' || proto <= 0) {
4510                 if ((pe = getprotobyname(av)) == NULL)
4511                         return NULL;
4512                 proto = pe->p_proto;
4513         }
4514
4515         fill_cmd(cmd, O_PROTO, 0, proto);
4516         *protop = proto;
4517         return cmd;
4518 }
4519
4520 static ipfw_insn *
4521 add_proto(ipfw_insn *cmd, char *av, u_char *protop)
4522 {
4523         u_char proto = IPPROTO_IP;
4524
4525         if (_substrcmp(av, "all") == 0 || strcmp(av, "ip") == 0)
4526                 ; /* do not set O_IP4 nor O_IP6 */
4527         else if (strcmp(av, "ip4") == 0)
4528                 /* explicit "just IPv4" rule */
4529                 fill_cmd(cmd, O_IP4, 0, 0);
4530         else if (strcmp(av, "ip6") == 0) {
4531                 /* explicit "just IPv6" rule */
4532                 proto = IPPROTO_IPV6;
4533                 fill_cmd(cmd, O_IP6, 0, 0);
4534         } else
4535                 return add_proto0(cmd, av, protop);
4536
4537         *protop = proto;
4538         return cmd;
4539 }
4540
4541 static ipfw_insn *
4542 add_proto_compat(ipfw_insn *cmd, char *av, u_char *protop)
4543 {
4544         u_char proto = IPPROTO_IP;
4545
4546         if (_substrcmp(av, "all") == 0 || strcmp(av, "ip") == 0)
4547                 ; /* do not set O_IP4 nor O_IP6 */
4548         else if (strcmp(av, "ipv4") == 0 || strcmp(av, "ip4") == 0)
4549                 /* explicit "just IPv4" rule */
4550                 fill_cmd(cmd, O_IP4, 0, 0);
4551         else if (strcmp(av, "ipv6") == 0 || strcmp(av, "ip6") == 0) {
4552                 /* explicit "just IPv6" rule */
4553                 proto = IPPROTO_IPV6;
4554                 fill_cmd(cmd, O_IP6, 0, 0);
4555         } else
4556                 return add_proto0(cmd, av, protop);
4557
4558         *protop = proto;
4559         return cmd;
4560 }
4561
4562 static ipfw_insn *
4563 add_srcip(ipfw_insn *cmd, char *av)
4564 {
4565         fill_ip((ipfw_insn_ip *)cmd, av);
4566         if (cmd->opcode == O_IP_DST_SET)                        /* set */
4567                 cmd->opcode = O_IP_SRC_SET;
4568         else if (cmd->opcode == O_IP_DST_LOOKUP)                /* table */
4569                 cmd->opcode = O_IP_SRC_LOOKUP;
4570         else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn))          /* me */
4571                 cmd->opcode = O_IP_SRC_ME;
4572         else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_u32))      /* one IP */
4573                 cmd->opcode = O_IP_SRC;
4574         else                                                    /* addr/mask */
4575                 cmd->opcode = O_IP_SRC_MASK;
4576         return cmd;
4577 }
4578
4579 static ipfw_insn *
4580 add_dstip(ipfw_insn *cmd, char *av)
4581 {
4582         fill_ip((ipfw_insn_ip *)cmd, av);
4583         if (cmd->opcode == O_IP_DST_SET)                        /* set */
4584                 ;
4585         else if (cmd->opcode == O_IP_DST_LOOKUP)                /* table */
4586                 ;
4587         else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn))          /* me */
4588                 cmd->opcode = O_IP_DST_ME;
4589         else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_u32))      /* one IP */
4590                 cmd->opcode = O_IP_DST;
4591         else                                                    /* addr/mask */
4592                 cmd->opcode = O_IP_DST_MASK;
4593         return cmd;
4594 }
4595
4596 static ipfw_insn *
4597 add_ports(ipfw_insn *cmd, char *av, u_char proto, int opcode)
4598 {
4599         if (_substrcmp(av, "any") == 0) {
4600                 return NULL;
4601         } else if (fill_newports((ipfw_insn_u16 *)cmd, av, proto)) {
4602                 /* XXX todo: check that we have a protocol with ports */
4603                 cmd->opcode = opcode;
4604                 return cmd;
4605         }
4606         return NULL;
4607 }
4608
4609 static ipfw_insn *
4610 add_src(ipfw_insn *cmd, char *av, u_char proto)
4611 {
4612         struct in6_addr a;
4613         char *host, *ch;
4614         ipfw_insn *ret = NULL;
4615
4616         if ((host = strdup(av)) == NULL)
4617                 return NULL;
4618         if ((ch = strrchr(host, '/')) != NULL)
4619                 *ch = '\0';
4620
4621         if (proto == IPPROTO_IPV6  || strcmp(av, "me6") == 0 ||
4622             inet_pton(AF_INET6, host, &a))
4623                 ret = add_srcip6(cmd, av);
4624         /* XXX: should check for IPv4, not !IPv6 */
4625         if (ret == NULL && (proto == IPPROTO_IP || strcmp(av, "me") == 0 ||
4626             !inet_pton(AF_INET6, host, &a)))
4627                 ret = add_srcip(cmd, av);
4628         if (ret == NULL && strcmp(av, "any") != 0)
4629                 ret = cmd;
4630
4631         free(host);
4632         return ret;
4633 }
4634
4635 static ipfw_insn *
4636 add_dst(ipfw_insn *cmd, char *av, u_char proto)
4637 {
4638         struct in6_addr a;
4639         char *host, *ch;
4640         ipfw_insn *ret = NULL;
4641
4642         if ((host = strdup(av)) == NULL)
4643                 return NULL;
4644         if ((ch = strrchr(host, '/')) != NULL)
4645                 *ch = '\0';
4646
4647         if (proto == IPPROTO_IPV6  || strcmp(av, "me6") == 0 ||
4648             inet_pton(AF_INET6, host, &a))
4649                 ret = add_dstip6(cmd, av);
4650         /* XXX: should check for IPv4, not !IPv6 */
4651         if (ret == NULL && (proto == IPPROTO_IP || strcmp(av, "me") == 0 ||
4652             !inet_pton(AF_INET6, host, &a)))
4653                 ret = add_dstip(cmd, av);
4654         if (ret == NULL && strcmp(av, "any") != 0)
4655                 ret = cmd;
4656
4657         free(host);
4658         return ret;
4659 }
4660
4661 /*
4662  * Parse arguments and assemble the microinstructions which make up a rule.
4663  * Rules are added into the 'rulebuf' and then copied in the correct order
4664  * into the actual rule.
4665  *
4666  * The syntax for a rule starts with the action, followed by
4667  * optional action parameters, and the various match patterns.
4668  * In the assembled microcode, the first opcode must be an O_PROBE_STATE
4669  * (generated if the rule includes a keep-state option), then the
4670  * various match patterns, log/altq actions, and the actual action.
4671  *
4672  */
4673 void
4674 ipfw_add(int ac, char *av[])
4675 {
4676         /*
4677          * rules are added into the 'rulebuf' and then copied in
4678          * the correct order into the actual rule.
4679          * Some things that need to go out of order (prob, action etc.)
4680          * go into actbuf[].
4681          */
4682         static uint32_t rulebuf[255], actbuf[255], cmdbuf[255];
4683
4684         ipfw_insn *src, *dst, *cmd, *action, *prev=NULL;
4685         ipfw_insn *first_cmd;   /* first match pattern */
4686
4687         struct ip_fw *rule;
4688
4689         /*
4690          * various flags used to record that we entered some fields.
4691          */
4692         ipfw_insn *have_state = NULL;   /* check-state or keep-state */
4693         ipfw_insn *have_log = NULL, *have_altq = NULL, *have_tag = NULL;
4694         size_t len;
4695
4696         int i;
4697
4698         int open_par = 0;       /* open parenthesis ( */
4699
4700         /* proto is here because it is used to fetch ports */
4701         u_char proto = IPPROTO_IP;      /* default protocol */
4702
4703         double match_prob = 1; /* match probability, default is always match */
4704
4705         bzero(actbuf, sizeof(actbuf));          /* actions go here */
4706         bzero(cmdbuf, sizeof(cmdbuf));
4707         bzero(rulebuf, sizeof(rulebuf));
4708
4709         rule = (struct ip_fw *)rulebuf;
4710         cmd = (ipfw_insn *)cmdbuf;
4711         action = (ipfw_insn *)actbuf;
4712
4713         av++; ac--;
4714
4715         /* [rule N]     -- Rule number optional */
4716         if (ac && isdigit(**av)) {
4717                 rule->rulenum = atoi(*av);
4718                 av++;
4719                 ac--;
4720         }
4721
4722         /* [set N]      -- set number (0..RESVD_SET), optional */
4723         if (ac > 1 && _substrcmp(*av, "set") == 0) {
4724                 int set = strtoul(av[1], NULL, 10);
4725                 if (set < 0 || set > RESVD_SET)
4726                         errx(EX_DATAERR, "illegal set %s", av[1]);
4727                 rule->set = set;
4728                 av += 2; ac -= 2;
4729         }
4730
4731         /* [prob D]     -- match probability, optional */
4732         if (ac > 1 && _substrcmp(*av, "prob") == 0) {
4733                 match_prob = strtod(av[1], NULL);
4734
4735                 if (match_prob <= 0 || match_prob > 1)
4736                         errx(EX_DATAERR, "illegal match prob. %s", av[1]);
4737                 av += 2; ac -= 2;
4738         }
4739
4740         /* action       -- mandatory */
4741         NEED1("missing action");
4742         i = match_token(rule_actions, *av);
4743         ac--; av++;
4744         action->len = 1;        /* default */
4745         switch(i) {
4746         case TOK_CHECKSTATE:
4747                 have_state = action;
4748                 action->opcode = O_CHECK_STATE;
4749                 break;
4750
4751         case TOK_ACCEPT:
4752                 action->opcode = O_ACCEPT;
4753                 break;
4754
4755         case TOK_DENY:
4756                 action->opcode = O_DENY;
4757                 action->arg1 = 0;
4758                 break;
4759
4760         case TOK_REJECT:
4761                 action->opcode = O_REJECT;
4762                 action->arg1 = ICMP_UNREACH_HOST;
4763                 break;
4764
4765         case TOK_RESET:
4766                 action->opcode = O_REJECT;
4767                 action->arg1 = ICMP_REJECT_RST;
4768                 break;
4769
4770         case TOK_RESET6:
4771                 action->opcode = O_UNREACH6;
4772                 action->arg1 = ICMP6_UNREACH_RST;
4773                 break;
4774
4775         case TOK_UNREACH:
4776                 action->opcode = O_REJECT;
4777                 NEED1("missing reject code");
4778                 fill_reject_code(&action->arg1, *av);
4779                 ac--; av++;
4780                 break;
4781
4782         case TOK_UNREACH6:
4783                 action->opcode = O_UNREACH6;
4784                 NEED1("missing unreach code");
4785                 fill_unreach6_code(&action->arg1, *av);
4786                 ac--; av++;
4787                 break;
4788
4789         case TOK_COUNT:
4790                 action->opcode = O_COUNT;
4791                 break;
4792
4793         case TOK_NAT:
4794                 action->opcode = O_NAT;
4795                 action->len = F_INSN_SIZE(ipfw_insn_nat);
4796                 goto chkarg;
4797
4798         case TOK_QUEUE:
4799                 action->opcode = O_QUEUE;
4800                 goto chkarg;
4801         case TOK_PIPE:
4802                 action->opcode = O_PIPE;
4803                 goto chkarg;
4804         case TOK_SKIPTO:
4805                 action->opcode = O_SKIPTO;
4806                 goto chkarg;
4807         case TOK_NETGRAPH:
4808                 action->opcode = O_NETGRAPH;
4809                 goto chkarg;
4810         case TOK_NGTEE:
4811                 action->opcode = O_NGTEE;
4812                 goto chkarg;
4813         case TOK_DIVERT:
4814                 action->opcode = O_DIVERT;
4815                 goto chkarg;
4816         case TOK_TEE:
4817                 action->opcode = O_TEE;
4818 chkarg:
4819                 if (!ac)
4820                         errx(EX_USAGE, "missing argument for %s", *(av - 1));
4821                 if (isdigit(**av)) {
4822                         action->arg1 = strtoul(*av, NULL, 10);
4823                         if (action->arg1 <= 0 || action->arg1 >= IP_FW_TABLEARG)
4824                                 errx(EX_DATAERR, "illegal argument for %s",
4825                                     *(av - 1));
4826                 } else if (_substrcmp(*av, "tablearg") == 0) {
4827                         action->arg1 = IP_FW_TABLEARG;
4828                 } else if (i == TOK_DIVERT || i == TOK_TEE) {
4829                         struct servent *s;
4830                         setservent(1);
4831                         s = getservbyname(av[0], "divert");
4832                         if (s != NULL)
4833                                 action->arg1 = ntohs(s->s_port);
4834                         else
4835                                 errx(EX_DATAERR, "illegal divert/tee port");
4836                 } else
4837                         errx(EX_DATAERR, "illegal argument for %s", *(av - 1));
4838                 ac--; av++;
4839                 break;
4840
4841         case TOK_FORWARD: {
4842                 ipfw_insn_sa *p = (ipfw_insn_sa *)action;
4843                 char *s, *end;
4844
4845                 NEED1("missing forward address[:port]");
4846
4847                 action->opcode = O_FORWARD_IP;
4848                 action->len = F_INSN_SIZE(ipfw_insn_sa);
4849
4850                 p->sa.sin_len = sizeof(struct sockaddr_in);
4851                 p->sa.sin_family = AF_INET;
4852                 p->sa.sin_port = 0;
4853                 /*
4854                  * locate the address-port separator (':' or ',')
4855                  */
4856                 s = strchr(*av, ':');
4857                 if (s == NULL)
4858                         s = strchr(*av, ',');
4859                 if (s != NULL) {
4860                         *(s++) = '\0';
4861                         i = strtoport(s, &end, 0 /* base */, 0 /* proto */);
4862                         if (s == end)
4863                                 errx(EX_DATAERR,
4864                                     "illegal forwarding port ``%s''", s);
4865                         p->sa.sin_port = (u_short)i;
4866                 }
4867                 if (_substrcmp(*av, "tablearg") == 0)
4868                         p->sa.sin_addr.s_addr = INADDR_ANY;
4869                 else
4870                         lookup_host(*av, &(p->sa.sin_addr));
4871                 ac--; av++;
4872                 break;
4873             }
4874         case TOK_COMMENT:
4875                 /* pretend it is a 'count' rule followed by the comment */
4876                 action->opcode = O_COUNT;
4877                 ac++; av--;     /* go back... */
4878                 break;
4879
4880         case TOK_SETFIB:
4881             {
4882                 int numfibs;
4883                 size_t intsize = sizeof(int);
4884
4885                 action->opcode = O_SETFIB;
4886                 NEED1("missing fib number");
4887                 action->arg1 = strtoul(*av, NULL, 10);
4888                 if (sysctlbyname("net.fibs", &numfibs, &intsize, NULL, 0) == -1)
4889                         errx(EX_DATAERR, "fibs not suported.\n");
4890                 if (action->arg1 >= numfibs)  /* Temporary */
4891                         errx(EX_DATAERR, "fib too large.\n");
4892                 ac--; av++;
4893                 break;
4894             }
4895
4896         default:
4897                 errx(EX_DATAERR, "invalid action %s\n", av[-1]);
4898         }
4899         action = next_cmd(action);
4900
4901         /*
4902          * [altq queuename] -- altq tag, optional
4903          * [log [logamount N]]  -- log, optional
4904          *
4905          * If they exist, it go first in the cmdbuf, but then it is
4906          * skipped in the copy section to the end of the buffer.
4907          */
4908         while (ac != 0 && (i = match_token(rule_action_params, *av)) != -1) {
4909                 ac--; av++;
4910                 switch (i) {
4911                 case TOK_LOG:
4912                     {
4913                         ipfw_insn_log *c = (ipfw_insn_log *)cmd;
4914                         int l;
4915
4916                         if (have_log)
4917                                 errx(EX_DATAERR,
4918                                     "log cannot be specified more than once");
4919                         have_log = (ipfw_insn *)c;
4920                         cmd->len = F_INSN_SIZE(ipfw_insn_log);
4921                         cmd->opcode = O_LOG;
4922                         if (ac && _substrcmp(*av, "logamount") == 0) {
4923                                 ac--; av++;
4924                                 NEED1("logamount requires argument");
4925                                 l = atoi(*av);
4926                                 if (l < 0)
4927                                         errx(EX_DATAERR,
4928                                             "logamount must be positive");
4929                                 c->max_log = l;
4930                                 ac--; av++;
4931                         } else {
4932                                 len = sizeof(c->max_log);
4933                                 if (sysctlbyname("net.inet.ip.fw.verbose_limit",
4934                                     &c->max_log, &len, NULL, 0) == -1)
4935                                         errx(1, "sysctlbyname(\"%s\")",
4936                                             "net.inet.ip.fw.verbose_limit");
4937                         }
4938                     }
4939                         break;
4940
4941                 case TOK_ALTQ:
4942                     {
4943                         ipfw_insn_altq *a = (ipfw_insn_altq *)cmd;
4944
4945                         NEED1("missing altq queue name");
4946                         if (have_altq)
4947                                 errx(EX_DATAERR,
4948                                     "altq cannot be specified more than once");
4949                         have_altq = (ipfw_insn *)a;
4950                         cmd->len = F_INSN_SIZE(ipfw_insn_altq);
4951                         cmd->opcode = O_ALTQ;
4952                         fill_altq_qid(&a->qid, *av);
4953                         ac--; av++;
4954                     }
4955                         break;
4956
4957                 case TOK_TAG:
4958                 case TOK_UNTAG: {
4959                         uint16_t tag;
4960
4961                         if (have_tag)
4962                                 errx(EX_USAGE, "tag and untag cannot be "
4963                                     "specified more than once");
4964                         GET_UINT_ARG(tag, 1, IPFW_DEFAULT_RULE - 1, i,
4965                            rule_action_params);
4966                         have_tag = cmd;
4967                         fill_cmd(cmd, O_TAG, (i == TOK_TAG) ? 0: F_NOT, tag);
4968                         ac--; av++;
4969                         break;
4970                 }
4971
4972                 default:
4973                         abort();
4974                 }
4975                 cmd = next_cmd(cmd);
4976         }
4977
4978         if (have_state) /* must be a check-state, we are done */
4979                 goto done;
4980
4981 #define OR_START(target)                                        \
4982         if (ac && (*av[0] == '(' || *av[0] == '{')) {           \
4983                 if (open_par)                                   \
4984                         errx(EX_USAGE, "nested \"(\" not allowed\n"); \
4985                 prev = NULL;                                    \
4986                 open_par = 1;                                   \
4987                 if ( (av[0])[1] == '\0') {                      \
4988                         ac--; av++;                             \
4989                 } else                                          \
4990                         (*av)++;                                \
4991         }                                                       \
4992         target:                                                 \
4993
4994
4995 #define CLOSE_PAR                                               \
4996         if (open_par) {                                         \
4997                 if (ac && (                                     \
4998                     strcmp(*av, ")") == 0 ||                    \
4999                     strcmp(*av, "}") == 0)) {                   \
5000                         prev = NULL;                            \
5001                         open_par = 0;                           \
5002                         ac--; av++;                             \
5003                 } else                                          \
5004                         errx(EX_USAGE, "missing \")\"\n");      \
5005         }
5006
5007 #define NOT_BLOCK                                               \
5008         if (ac && _substrcmp(*av, "not") == 0) {                \
5009                 if (cmd->len & F_NOT)                           \
5010                         errx(EX_USAGE, "double \"not\" not allowed\n"); \
5011                 cmd->len |= F_NOT;                              \
5012                 ac--; av++;                                     \
5013         }
5014
5015 #define OR_BLOCK(target)                                        \
5016         if (ac && _substrcmp(*av, "or") == 0) {         \
5017                 if (prev == NULL || open_par == 0)              \
5018                         errx(EX_DATAERR, "invalid OR block");   \
5019                 prev->len |= F_OR;                              \
5020                 ac--; av++;                                     \
5021                 goto target;                                    \
5022         }                                                       \
5023         CLOSE_PAR;
5024
5025         first_cmd = cmd;
5026
5027 #if 0
5028         /*
5029          * MAC addresses, optional.
5030          * If we have this, we skip the part "proto from src to dst"
5031          * and jump straight to the option parsing.
5032          */
5033         NOT_BLOCK;
5034         NEED1("missing protocol");
5035         if (_substrcmp(*av, "MAC") == 0 ||
5036             _substrcmp(*av, "mac") == 0) {
5037                 ac--; av++;     /* the "MAC" keyword */
5038                 add_mac(cmd, ac, av); /* exits in case of errors */
5039                 cmd = next_cmd(cmd);
5040                 ac -= 2; av += 2;       /* dst-mac and src-mac */
5041                 NOT_BLOCK;
5042                 NEED1("missing mac type");
5043                 if (add_mactype(cmd, ac, av[0]))
5044                         cmd = next_cmd(cmd);
5045                 ac--; av++;     /* any or mac-type */
5046                 goto read_options;
5047         }
5048 #endif
5049
5050         /*
5051          * protocol, mandatory
5052          */
5053     OR_START(get_proto);
5054         NOT_BLOCK;
5055         NEED1("missing protocol");
5056         if (add_proto_compat(cmd, *av, &proto)) {
5057                 av++; ac--;
5058                 if (F_LEN(cmd) != 0) {
5059                         prev = cmd;
5060                         cmd = next_cmd(cmd);
5061                 }
5062         } else if (first_cmd != cmd) {
5063                 errx(EX_DATAERR, "invalid protocol ``%s''", *av);
5064         } else
5065                 goto read_options;
5066     OR_BLOCK(get_proto);
5067
5068         /*
5069          * "from", mandatory
5070          */
5071         if (!ac || _substrcmp(*av, "from") != 0)
5072                 errx(EX_USAGE, "missing ``from''");
5073         ac--; av++;
5074
5075         /*
5076          * source IP, mandatory
5077          */
5078     OR_START(source_ip);
5079         NOT_BLOCK;      /* optional "not" */
5080         NEED1("missing source address");
5081         if (add_src(cmd, *av, proto)) {
5082                 ac--; av++;
5083                 if (F_LEN(cmd) != 0) {  /* ! any */
5084                         prev = cmd;
5085                         cmd = next_cmd(cmd);
5086                 }
5087         } else
5088                 errx(EX_USAGE, "bad source address %s", *av);
5089     OR_BLOCK(source_ip);
5090
5091         /*
5092          * source ports, optional
5093          */
5094         NOT_BLOCK;      /* optional "not" */
5095         if (ac) {
5096                 if (_substrcmp(*av, "any") == 0 ||
5097                     add_ports(cmd, *av, proto, O_IP_SRCPORT)) {
5098                         ac--; av++;
5099                         if (F_LEN(cmd) != 0)
5100                                 cmd = next_cmd(cmd);
5101                 }
5102         }
5103
5104         /*
5105          * "to", mandatory
5106          */
5107         if (!ac || _substrcmp(*av, "to") != 0)
5108                 errx(EX_USAGE, "missing ``to''");
5109         av++; ac--;
5110
5111         /*
5112          * destination, mandatory
5113          */
5114     OR_START(dest_ip);
5115         NOT_BLOCK;      /* optional "not" */
5116         NEED1("missing dst address");
5117         if (add_dst(cmd, *av, proto)) {
5118                 ac--; av++;
5119                 if (F_LEN(cmd) != 0) {  /* ! any */
5120                         prev = cmd;
5121                         cmd = next_cmd(cmd);
5122                 }
5123         } else
5124                 errx( EX_USAGE, "bad destination address %s", *av);
5125     OR_BLOCK(dest_ip);
5126
5127         /*
5128          * dest. ports, optional
5129          */
5130         NOT_BLOCK;      /* optional "not" */
5131         if (ac) {
5132                 if (_substrcmp(*av, "any") == 0 ||
5133                     add_ports(cmd, *av, proto, O_IP_DSTPORT)) {
5134                         ac--; av++;
5135                         if (F_LEN(cmd) != 0)
5136                                 cmd = next_cmd(cmd);
5137                 }
5138         }
5139
5140 read_options:
5141         if (ac && first_cmd == cmd) {
5142                 /*
5143                  * nothing specified so far, store in the rule to ease
5144                  * printout later.
5145                  */
5146                  rule->_pad = 1;
5147         }
5148         prev = NULL;
5149         while (ac) {
5150                 char *s;
5151                 ipfw_insn_u32 *cmd32;   /* alias for cmd */
5152
5153                 s = *av;
5154                 cmd32 = (ipfw_insn_u32 *)cmd;
5155
5156                 if (*s == '!') {        /* alternate syntax for NOT */
5157                         if (cmd->len & F_NOT)
5158                                 errx(EX_USAGE, "double \"not\" not allowed\n");
5159                         cmd->len = F_NOT;
5160                         s++;
5161                 }
5162                 i = match_token(rule_options, s);
5163                 ac--; av++;
5164                 switch(i) {
5165                 case TOK_NOT:
5166                         if (cmd->len & F_NOT)
5167                                 errx(EX_USAGE, "double \"not\" not allowed\n");
5168                         cmd->len = F_NOT;
5169                         break;
5170
5171                 case TOK_OR:
5172                         if (open_par == 0 || prev == NULL)
5173                                 errx(EX_USAGE, "invalid \"or\" block\n");
5174                         prev->len |= F_OR;
5175                         break;
5176
5177                 case TOK_STARTBRACE:
5178                         if (open_par)
5179                                 errx(EX_USAGE, "+nested \"(\" not allowed\n");
5180                         open_par = 1;
5181                         break;
5182
5183                 case TOK_ENDBRACE:
5184                         if (!open_par)
5185                                 errx(EX_USAGE, "+missing \")\"\n");
5186                         open_par = 0;
5187                         prev = NULL;
5188                         break;
5189
5190                 case TOK_IN:
5191                         fill_cmd(cmd, O_IN, 0, 0);
5192                         break;
5193
5194                 case TOK_OUT:
5195                         cmd->len ^= F_NOT; /* toggle F_NOT */
5196                         fill_cmd(cmd, O_IN, 0, 0);
5197                         break;
5198
5199                 case TOK_DIVERTED:
5200                         fill_cmd(cmd, O_DIVERTED, 0, 3);
5201                         break;
5202
5203                 case TOK_DIVERTEDLOOPBACK:
5204                         fill_cmd(cmd, O_DIVERTED, 0, 1);
5205                         break;
5206
5207                 case TOK_DIVERTEDOUTPUT:
5208                         fill_cmd(cmd, O_DIVERTED, 0, 2);
5209                         break;
5210
5211                 case TOK_FRAG:
5212                         fill_cmd(cmd, O_FRAG, 0, 0);
5213                         break;
5214
5215                 case TOK_LAYER2:
5216                         fill_cmd(cmd, O_LAYER2, 0, 0);
5217                         break;
5218
5219                 case TOK_XMIT:
5220                 case TOK_RECV:
5221                 case TOK_VIA:
5222                         NEED1("recv, xmit, via require interface name"
5223                                 " or address");
5224                         fill_iface((ipfw_insn_if *)cmd, av[0]);
5225                         ac--; av++;
5226                         if (F_LEN(cmd) == 0)    /* not a valid address */
5227                                 break;
5228                         if (i == TOK_XMIT)
5229                                 cmd->opcode = O_XMIT;
5230                         else if (i == TOK_RECV)
5231                                 cmd->opcode = O_RECV;
5232                         else if (i == TOK_VIA)
5233                                 cmd->opcode = O_VIA;
5234                         break;
5235
5236                 case TOK_ICMPTYPES:
5237                         NEED1("icmptypes requires list of types");
5238                         fill_icmptypes((ipfw_insn_u32 *)cmd, *av);
5239                         av++; ac--;
5240                         break;
5241
5242                 case TOK_ICMP6TYPES:
5243                         NEED1("icmptypes requires list of types");
5244                         fill_icmp6types((ipfw_insn_icmp6 *)cmd, *av);
5245                         av++; ac--;
5246                         break;
5247
5248                 case TOK_IPTTL:
5249                         NEED1("ipttl requires TTL");
5250                         if (strpbrk(*av, "-,")) {
5251                             if (!add_ports(cmd, *av, 0, O_IPTTL))
5252                                 errx(EX_DATAERR, "invalid ipttl %s", *av);
5253                         } else
5254                             fill_cmd(cmd, O_IPTTL, 0, strtoul(*av, NULL, 0));
5255                         ac--; av++;
5256                         break;
5257
5258                 case TOK_IPID:
5259                         NEED1("ipid requires id");
5260                         if (strpbrk(*av, "-,")) {
5261                             if (!add_ports(cmd, *av, 0, O_IPID))
5262                                 errx(EX_DATAERR, "invalid ipid %s", *av);
5263                         } else
5264                             fill_cmd(cmd, O_IPID, 0, strtoul(*av, NULL, 0));
5265                         ac--; av++;
5266                         break;
5267
5268                 case TOK_IPLEN:
5269                         NEED1("iplen requires length");
5270                         if (strpbrk(*av, "-,")) {
5271                             if (!add_ports(cmd, *av, 0, O_IPLEN))
5272                                 errx(EX_DATAERR, "invalid ip len %s", *av);
5273                         } else
5274                             fill_cmd(cmd, O_IPLEN, 0, strtoul(*av, NULL, 0));
5275                         ac--; av++;
5276                         break;
5277
5278                 case TOK_IPVER:
5279                         NEED1("ipver requires version");
5280                         fill_cmd(cmd, O_IPVER, 0, strtoul(*av, NULL, 0));
5281                         ac--; av++;
5282                         break;
5283
5284                 case TOK_IPPRECEDENCE:
5285                         NEED1("ipprecedence requires value");
5286                         fill_cmd(cmd, O_IPPRECEDENCE, 0,
5287                             (strtoul(*av, NULL, 0) & 7) << 5);
5288                         ac--; av++;
5289                         break;
5290
5291                 case TOK_IPOPTS:
5292                         NEED1("missing argument for ipoptions");
5293                         fill_flags(cmd, O_IPOPT, f_ipopts, *av);
5294                         ac--; av++;
5295                         break;
5296
5297                 case TOK_IPTOS:
5298                         NEED1("missing argument for iptos");
5299                         fill_flags(cmd, O_IPTOS, f_iptos, *av);
5300                         ac--; av++;
5301                         break;
5302
5303                 case TOK_UID:
5304                         NEED1("uid requires argument");
5305                     {
5306                         char *end;
5307                         uid_t uid;
5308                         struct passwd *pwd;
5309
5310                         cmd->opcode = O_UID;
5311                         uid = strtoul(*av, &end, 0);
5312                         pwd = (*end == '\0') ? getpwuid(uid) : getpwnam(*av);
5313                         if (pwd == NULL)
5314                                 errx(EX_DATAERR, "uid \"%s\" nonexistent", *av);
5315                         cmd32->d[0] = pwd->pw_uid;
5316                         cmd->len |= F_INSN_SIZE(ipfw_insn_u32);
5317                         ac--; av++;
5318                     }
5319                         break;
5320
5321                 case TOK_GID:
5322                         NEED1("gid requires argument");
5323                     {
5324                         char *end;
5325                         gid_t gid;
5326                         struct group *grp;
5327
5328                         cmd->opcode = O_GID;
5329                         gid = strtoul(*av, &end, 0);
5330                         grp = (*end == '\0') ? getgrgid(gid) : getgrnam(*av);
5331                         if (grp == NULL)
5332                                 errx(EX_DATAERR, "gid \"%s\" nonexistent", *av);
5333                         cmd32->d[0] = grp->gr_gid;
5334                         cmd->len |= F_INSN_SIZE(ipfw_insn_u32);
5335                         ac--; av++;
5336                     }
5337                         break;
5338
5339                 case TOK_JAIL:
5340                         NEED1("jail requires argument");
5341                     {
5342                         char *end;
5343                         int jid;
5344
5345                         cmd->opcode = O_JAIL;
5346                         jid = (int)strtol(*av, &end, 0);
5347                         if (jid < 0 || *end != '\0')
5348                                 errx(EX_DATAERR, "jail requires prison ID");
5349                         cmd32->d[0] = (uint32_t)jid;
5350                         cmd->len |= F_INSN_SIZE(ipfw_insn_u32);
5351                         ac--; av++;
5352                     }
5353                         break;
5354
5355                 case TOK_ESTAB:
5356                         fill_cmd(cmd, O_ESTAB, 0, 0);
5357                         break;
5358
5359                 case TOK_SETUP:
5360                         fill_cmd(cmd, O_TCPFLAGS, 0,
5361                                 (TH_SYN) | ( (TH_ACK) & 0xff) <<8 );
5362                         break;
5363
5364                 case TOK_TCPDATALEN:
5365                         NEED1("tcpdatalen requires length");
5366                         if (strpbrk(*av, "-,")) {
5367                             if (!add_ports(cmd, *av, 0, O_TCPDATALEN))
5368                                 errx(EX_DATAERR, "invalid tcpdata len %s", *av);
5369                         } else
5370                             fill_cmd(cmd, O_TCPDATALEN, 0,
5371                                     strtoul(*av, NULL, 0));
5372                         ac--; av++;
5373                         break;
5374
5375                 case TOK_TCPOPTS:
5376                         NEED1("missing argument for tcpoptions");
5377                         fill_flags(cmd, O_TCPOPTS, f_tcpopts, *av);
5378                         ac--; av++;
5379                         break;
5380
5381                 case TOK_TCPSEQ:
5382                 case TOK_TCPACK:
5383                         NEED1("tcpseq/tcpack requires argument");
5384                         cmd->len = F_INSN_SIZE(ipfw_insn_u32);
5385                         cmd->opcode = (i == TOK_TCPSEQ) ? O_TCPSEQ : O_TCPACK;
5386                         cmd32->d[0] = htonl(strtoul(*av, NULL, 0));
5387                         ac--; av++;
5388                         break;
5389
5390                 case TOK_TCPWIN:
5391                         NEED1("tcpwin requires length");
5392                         fill_cmd(cmd, O_TCPWIN, 0,
5393                             htons(strtoul(*av, NULL, 0)));
5394                         ac--; av++;
5395                         break;
5396
5397                 case TOK_TCPFLAGS:
5398                         NEED1("missing argument for tcpflags");
5399                         cmd->opcode = O_TCPFLAGS;
5400                         fill_flags(cmd, O_TCPFLAGS, f_tcpflags, *av);
5401                         ac--; av++;
5402                         break;
5403
5404                 case TOK_KEEPSTATE:
5405                         if (open_par)
5406                                 errx(EX_USAGE, "keep-state cannot be part "
5407                                     "of an or block");
5408                         if (have_state)
5409                                 errx(EX_USAGE, "only one of keep-state "
5410                                         "and limit is allowed");
5411                         have_state = cmd;
5412                         fill_cmd(cmd, O_KEEP_STATE, 0, 0);
5413                         break;
5414
5415                 case TOK_LIMIT: {
5416                         ipfw_insn_limit *c = (ipfw_insn_limit *)cmd;
5417                         int val;
5418
5419                         if (open_par)
5420                                 errx(EX_USAGE,
5421                                     "limit cannot be part of an or block");
5422                         if (have_state)
5423                                 errx(EX_USAGE, "only one of keep-state and "
5424                                     "limit is allowed");
5425                         have_state = cmd;
5426
5427                         cmd->len = F_INSN_SIZE(ipfw_insn_limit);
5428                         cmd->opcode = O_LIMIT;
5429                         c->limit_mask = c->conn_limit = 0;
5430
5431                         while (ac > 0) {
5432                                 if ((val = match_token(limit_masks, *av)) <= 0)
5433                                         break;
5434                                 c->limit_mask |= val;
5435                                 ac--; av++;
5436                         }
5437
5438                         if (c->limit_mask == 0)
5439                                 errx(EX_USAGE, "limit: missing limit mask");
5440
5441                         GET_UINT_ARG(c->conn_limit, 1, IPFW_DEFAULT_RULE - 1,
5442                             TOK_LIMIT, rule_options);
5443
5444                         ac--; av++;
5445                         break;
5446                 }
5447
5448                 case TOK_PROTO:
5449                         NEED1("missing protocol");
5450                         if (add_proto(cmd, *av, &proto)) {
5451                                 ac--; av++;
5452                         } else
5453                                 errx(EX_DATAERR, "invalid protocol ``%s''",
5454                                     *av);
5455                         break;
5456
5457                 case TOK_SRCIP:
5458                         NEED1("missing source IP");
5459                         if (add_srcip(cmd, *av)) {
5460                                 ac--; av++;
5461                         }
5462                         break;
5463
5464                 case TOK_DSTIP:
5465                         NEED1("missing destination IP");
5466                         if (add_dstip(cmd, *av)) {
5467                                 ac--; av++;
5468                         }
5469                         break;
5470
5471                 case TOK_SRCIP6:
5472                         NEED1("missing source IP6");
5473                         if (add_srcip6(cmd, *av)) {
5474                                 ac--; av++;
5475                         }
5476                         break;
5477
5478                 case TOK_DSTIP6:
5479                         NEED1("missing destination IP6");
5480                         if (add_dstip6(cmd, *av)) {
5481                                 ac--; av++;
5482                         }
5483                         break;
5484
5485                 case TOK_SRCPORT:
5486                         NEED1("missing source port");
5487                         if (_substrcmp(*av, "any") == 0 ||
5488                             add_ports(cmd, *av, proto, O_IP_SRCPORT)) {
5489                                 ac--; av++;
5490                         } else
5491                                 errx(EX_DATAERR, "invalid source port %s", *av);
5492                         break;
5493
5494                 case TOK_DSTPORT:
5495                         NEED1("missing destination port");
5496                         if (_substrcmp(*av, "any") == 0 ||
5497                             add_ports(cmd, *av, proto, O_IP_DSTPORT)) {
5498                                 ac--; av++;
5499                         } else
5500                                 errx(EX_DATAERR, "invalid destination port %s",
5501                                     *av);
5502                         break;
5503
5504                 case TOK_MAC:
5505                         if (add_mac(cmd, ac, av)) {
5506                                 ac -= 2; av += 2;
5507                         }
5508                         break;
5509
5510                 case TOK_MACTYPE:
5511                         NEED1("missing mac type");
5512                         if (!add_mactype(cmd, ac, *av))
5513                                 errx(EX_DATAERR, "invalid mac type %s", *av);
5514                         ac--; av++;
5515                         break;
5516
5517                 case TOK_VERREVPATH:
5518                         fill_cmd(cmd, O_VERREVPATH, 0, 0);
5519                         break;
5520
5521                 case TOK_VERSRCREACH:
5522                         fill_cmd(cmd, O_VERSRCREACH, 0, 0);
5523                         break;
5524
5525                 case TOK_ANTISPOOF:
5526                         fill_cmd(cmd, O_ANTISPOOF, 0, 0);
5527                         break;
5528
5529                 case TOK_IPSEC:
5530                         fill_cmd(cmd, O_IPSEC, 0, 0);
5531                         break;
5532
5533                 case TOK_IPV6:
5534                         fill_cmd(cmd, O_IP6, 0, 0);
5535                         break;
5536
5537                 case TOK_IPV4:
5538                         fill_cmd(cmd, O_IP4, 0, 0);
5539                         break;
5540
5541                 case TOK_EXT6HDR:
5542                         fill_ext6hdr( cmd, *av );
5543                         ac--; av++;
5544                         break;
5545
5546                 case TOK_FLOWID:
5547                         if (proto != IPPROTO_IPV6 )
5548                                 errx( EX_USAGE, "flow-id filter is active "
5549                                     "only for ipv6 protocol\n");
5550                         fill_flow6( (ipfw_insn_u32 *) cmd, *av );
5551                         ac--; av++;
5552                         break;
5553
5554                 case TOK_COMMENT:
5555                         fill_comment(cmd, ac, av);
5556                         av += ac;
5557                         ac = 0;
5558                         break;
5559
5560                 case TOK_TAGGED:
5561                         if (ac > 0 && strpbrk(*av, "-,")) {
5562                                 if (!add_ports(cmd, *av, 0, O_TAGGED))
5563                                         errx(EX_DATAERR, "tagged: invalid tag"
5564                                             " list: %s", *av);
5565                         }
5566                         else {
5567                                 uint16_t tag;
5568
5569                                 GET_UINT_ARG(tag, 1, IPFW_DEFAULT_RULE - 1,
5570                                     TOK_TAGGED, rule_options);
5571                                 fill_cmd(cmd, O_TAGGED, 0, tag);
5572                         }
5573                         ac--; av++;
5574                         break;
5575
5576                 case TOK_FIB:
5577                         NEED1("fib requires fib number");
5578                         fill_cmd(cmd, O_FIB, 0, strtoul(*av, NULL, 0));
5579                         ac--; av++;
5580                         break;
5581
5582                 default:
5583                         errx(EX_USAGE, "unrecognised option [%d] %s\n", i, s);
5584                 }
5585                 if (F_LEN(cmd) > 0) {   /* prepare to advance */
5586                         prev = cmd;
5587                         cmd = next_cmd(cmd);
5588                 }
5589         }
5590
5591 done:
5592         /*
5593          * Now copy stuff into the rule.
5594          * If we have a keep-state option, the first instruction
5595          * must be a PROBE_STATE (which is generated here).
5596          * If we have a LOG option, it was stored as the first command,
5597          * and now must be moved to the top of the action part.
5598          */
5599         dst = (ipfw_insn *)rule->cmd;
5600
5601         /*
5602          * First thing to write into the command stream is the match probability.
5603          */
5604         if (match_prob != 1) { /* 1 means always match */
5605                 dst->opcode = O_PROB;
5606                 dst->len = 2;
5607                 *((int32_t *)(dst+1)) = (int32_t)(match_prob * 0x7fffffff);
5608                 dst += dst->len;
5609         }
5610
5611         /*
5612          * generate O_PROBE_STATE if necessary
5613          */
5614         if (have_state && have_state->opcode != O_CHECK_STATE) {
5615                 fill_cmd(dst, O_PROBE_STATE, 0, 0);
5616                 dst = next_cmd(dst);
5617         }
5618
5619         /* copy all commands but O_LOG, O_KEEP_STATE, O_LIMIT, O_ALTQ, O_TAG */
5620         for (src = (ipfw_insn *)cmdbuf; src != cmd; src += i) {
5621                 i = F_LEN(src);
5622
5623                 switch (src->opcode) {
5624                 case O_LOG:
5625                 case O_KEEP_STATE:
5626                 case O_LIMIT:
5627                 case O_ALTQ:
5628                 case O_TAG:
5629                         break;
5630                 default:
5631                         bcopy(src, dst, i * sizeof(uint32_t));
5632                         dst += i;
5633                 }
5634         }
5635
5636         /*
5637          * put back the have_state command as last opcode
5638          */
5639         if (have_state && have_state->opcode != O_CHECK_STATE) {
5640                 i = F_LEN(have_state);
5641                 bcopy(have_state, dst, i * sizeof(uint32_t));
5642                 dst += i;
5643         }
5644         /*
5645          * start action section
5646          */
5647         rule->act_ofs = dst - rule->cmd;
5648
5649         /* put back O_LOG, O_ALTQ, O_TAG if necessary */
5650         if (have_log) {
5651                 i = F_LEN(have_log);
5652                 bcopy(have_log, dst, i * sizeof(uint32_t));
5653                 dst += i;
5654         }
5655         if (have_altq) {
5656                 i = F_LEN(have_altq);
5657                 bcopy(have_altq, dst, i * sizeof(uint32_t));
5658                 dst += i;
5659         }
5660         if (have_tag) {
5661                 i = F_LEN(have_tag);
5662                 bcopy(have_tag, dst, i * sizeof(uint32_t));
5663                 dst += i;
5664         }
5665         /*
5666          * copy all other actions
5667          */
5668         for (src = (ipfw_insn *)actbuf; src != action; src += i) {
5669                 i = F_LEN(src);
5670                 bcopy(src, dst, i * sizeof(uint32_t));
5671                 dst += i;
5672         }
5673
5674         rule->cmd_len = (uint32_t *)dst - (uint32_t *)(rule->cmd);
5675         i = (char *)dst - (char *)rule;
5676         if (do_cmd(IP_FW_ADD, rule, (uintptr_t)&i) == -1)
5677                 err(EX_UNAVAILABLE, "getsockopt(%s)", "IP_FW_ADD");
5678         if (!co.do_quiet)
5679                 show_ipfw(rule, 0, 0);
5680 }
5681
5682 /*
5683  * clear the counters or the log counters.
5684  */
5685 void
5686 ipfw_zero(int ac, char *av[], int optname /* 0 = IP_FW_ZERO, 1 = IP_FW_RESETLOG */)
5687 {
5688         uint32_t arg, saved_arg;
5689         int failed = EX_OK;
5690         char const *errstr;
5691         char const *name = optname ? "RESETLOG" : "ZERO";
5692
5693         optname = optname ? IP_FW_RESETLOG : IP_FW_ZERO;
5694
5695         av++; ac--;
5696
5697         if (!ac) {
5698                 /* clear all entries */
5699                 if (do_cmd(optname, NULL, 0) < 0)
5700                         err(EX_UNAVAILABLE, "setsockopt(IP_FW_%s)", name);
5701                 if (!co.do_quiet)
5702                         printf("%s.\n", optname == IP_FW_ZERO ?
5703                             "Accounting cleared":"Logging counts reset");
5704
5705                 return;
5706         }
5707
5708         while (ac) {
5709                 /* Rule number */
5710                 if (isdigit(**av)) {
5711                         arg = strtonum(*av, 0, 0xffff, &errstr);
5712                         if (errstr)
5713                                 errx(EX_DATAERR,
5714                                     "invalid rule number %s\n", *av);
5715                         saved_arg = arg;
5716                         if (co.use_set)
5717                                 arg |= (1 << 24) | ((co.use_set - 1) << 16);
5718                         av++;
5719                         ac--;
5720                         if (do_cmd(optname, &arg, sizeof(arg))) {
5721                                 warn("rule %u: setsockopt(IP_FW_%s)",
5722                                     saved_arg, name);
5723                                 failed = EX_UNAVAILABLE;
5724                         } else if (!co.do_quiet)
5725                                 printf("Entry %d %s.\n", saved_arg,
5726                                     optname == IP_FW_ZERO ?
5727                                         "cleared" : "logging count reset");
5728                 } else {
5729                         errx(EX_USAGE, "invalid rule number ``%s''", *av);
5730                 }
5731         }
5732         if (failed != EX_OK)
5733                 exit(failed);
5734 }
5735
5736 void
5737 ipfw_flush(int force)
5738 {
5739         int cmd = co.do_pipe ? IP_DUMMYNET_FLUSH : IP_FW_FLUSH;
5740
5741         if (!force && !co.do_quiet) { /* need to ask user */
5742                 int c;
5743
5744                 printf("Are you sure? [yn] ");
5745                 fflush(stdout);
5746                 do {
5747                         c = toupper(getc(stdin));
5748                         while (c != '\n' && getc(stdin) != '\n')
5749                                 if (feof(stdin))
5750                                         return; /* and do not flush */
5751                 } while (c != 'Y' && c != 'N');
5752                 printf("\n");
5753                 if (c == 'N')   /* user said no */
5754                         return;
5755         }
5756         /* `ipfw set N flush` - is the same that `ipfw delete set N` */
5757         if (co.use_set) {
5758                 uint32_t arg = ((co.use_set - 1) & 0xffff) | (1 << 24);
5759                 if (do_cmd(IP_FW_DEL, &arg, sizeof(arg)) < 0)
5760                         err(EX_UNAVAILABLE, "setsockopt(IP_FW_DEL)");
5761         } else if (do_cmd(cmd, NULL, 0) < 0)
5762                 err(EX_UNAVAILABLE, "setsockopt(IP_%s_FLUSH)",
5763                     co.do_pipe ? "DUMMYNET" : "FW");
5764         if (!co.do_quiet)
5765                 printf("Flushed all %s.\n", co.do_pipe ? "pipes" : "rules");
5766 }
5767
5768
5769 static void table_list(ipfw_table_entry ent, int need_header);
5770
5771 /*
5772  * This one handles all table-related commands
5773  *      ipfw table N add addr[/masklen] [value]
5774  *      ipfw table N delete addr[/masklen]
5775  *      ipfw table {N | all} flush
5776  *      ipfw table {N | all} list
5777  */
5778 void
5779 ipfw_table_handler(int ac, char *av[])
5780 {
5781         ipfw_table_entry ent;
5782         int do_add;
5783         int is_all;
5784         size_t len;
5785         char *p;
5786         uint32_t a;
5787         uint32_t tables_max;
5788
5789         len = sizeof(tables_max);
5790         if (sysctlbyname("net.inet.ip.fw.tables_max", &tables_max, &len,
5791                 NULL, 0) == -1) {
5792 #ifdef IPFW_TABLES_MAX
5793                 warn("Warn: Failed to get the max tables number via sysctl. "
5794                      "Using the compiled in defaults. \nThe reason was");
5795                 tables_max = IPFW_TABLES_MAX;
5796 #else
5797                 errx(1, "Failed sysctlbyname(\"net.inet.ip.fw.tables_max\")");
5798 #endif
5799         }
5800
5801         ac--; av++;
5802         if (ac && isdigit(**av)) {
5803                 ent.tbl = atoi(*av);
5804                 is_all = 0;
5805                 ac--; av++;
5806         } else if (ac && _substrcmp(*av, "all") == 0) {
5807                 ent.tbl = 0;
5808                 is_all = 1;
5809                 ac--; av++;
5810         } else
5811                 errx(EX_USAGE, "table number or 'all' keyword required");
5812         if (ent.tbl >= tables_max)
5813                 errx(EX_USAGE, "The table number exceeds the maximum allowed "
5814                         "value (%d)", tables_max - 1);
5815         NEED1("table needs command");
5816         if (is_all && _substrcmp(*av, "list") != 0
5817                    && _substrcmp(*av, "flush") != 0)
5818                 errx(EX_USAGE, "table number required");
5819
5820         if (_substrcmp(*av, "add") == 0 ||
5821             _substrcmp(*av, "delete") == 0) {
5822                 do_add = **av == 'a';
5823                 ac--; av++;
5824                 if (!ac)
5825                         errx(EX_USAGE, "IP address required");
5826                 p = strchr(*av, '/');
5827                 if (p) {
5828                         *p++ = '\0';
5829                         ent.masklen = atoi(p);
5830                         if (ent.masklen > 32)
5831                                 errx(EX_DATAERR, "bad width ``%s''", p);
5832                 } else
5833                         ent.masklen = 32;
5834                 if (lookup_host(*av, (struct in_addr *)&ent.addr) != 0)
5835                         errx(EX_NOHOST, "hostname ``%s'' unknown", *av);
5836                 ac--; av++;
5837                 if (do_add && ac) {
5838                         unsigned int tval;
5839                         /* isdigit is a bit of a hack here.. */
5840                         if (strchr(*av, (int)'.') == NULL && isdigit(**av))  {
5841                                 ent.value = strtoul(*av, NULL, 0);
5842                         } else {
5843                                 if (lookup_host(*av, (struct in_addr *)&tval) == 0) {
5844                                         /* The value must be stored in host order        *
5845                                          * so that the values < 65k can be distinguished */
5846                                         ent.value = ntohl(tval);
5847                                 } else {
5848                                         errx(EX_NOHOST, "hostname ``%s'' unknown", *av);
5849                                 }
5850                         }
5851                 } else
5852                         ent.value = 0;
5853                 if (do_cmd(do_add ? IP_FW_TABLE_ADD : IP_FW_TABLE_DEL,
5854                     &ent, sizeof(ent)) < 0) {
5855                         /* If running silent, don't bomb out on these errors. */
5856                         if (!(co.do_quiet && (errno == (do_add ? EEXIST : ESRCH))))
5857                                 err(EX_OSERR, "setsockopt(IP_FW_TABLE_%s)",
5858                                     do_add ? "ADD" : "DEL");
5859                         /* In silent mode, react to a failed add by deleting */
5860                         if (do_add) {
5861                                 do_cmd(IP_FW_TABLE_DEL, &ent, sizeof(ent));
5862                                 if (do_cmd(IP_FW_TABLE_ADD,
5863                                     &ent, sizeof(ent)) < 0)
5864                                         err(EX_OSERR,
5865                                             "setsockopt(IP_FW_TABLE_ADD)");
5866                         }
5867                 }
5868         } else if (_substrcmp(*av, "flush") == 0) {
5869                 a = is_all ? tables_max : (ent.tbl + 1);
5870                 do {
5871                         if (do_cmd(IP_FW_TABLE_FLUSH, &ent.tbl,
5872                             sizeof(ent.tbl)) < 0)
5873                                 err(EX_OSERR, "setsockopt(IP_FW_TABLE_FLUSH)");
5874                 } while (++ent.tbl < a);
5875         } else if (_substrcmp(*av, "list") == 0) {
5876                 a = is_all ? tables_max : (ent.tbl + 1);
5877                 do {
5878                         table_list(ent, is_all);
5879                 } while (++ent.tbl < a);
5880         } else
5881                 errx(EX_USAGE, "invalid table command %s", *av);
5882 }
5883
5884 static void
5885 table_list(ipfw_table_entry ent, int need_header)
5886 {
5887         ipfw_table *tbl;
5888         socklen_t l;
5889         uint32_t a;
5890
5891         a = ent.tbl;
5892         l = sizeof(a);
5893         if (do_cmd(IP_FW_TABLE_GETSIZE, &a, (uintptr_t)&l) < 0)
5894                 err(EX_OSERR, "getsockopt(IP_FW_TABLE_GETSIZE)");
5895
5896         /* If a is zero we have nothing to do, the table is empty. */
5897         if (a == 0)
5898                 return;
5899
5900         l = sizeof(*tbl) + a * sizeof(ipfw_table_entry);
5901         tbl = safe_calloc(1, l);
5902         tbl->tbl = ent.tbl;
5903         if (do_cmd(IP_FW_TABLE_LIST, tbl, (uintptr_t)&l) < 0)
5904                 err(EX_OSERR, "getsockopt(IP_FW_TABLE_LIST)");
5905         if (tbl->cnt && need_header)
5906                 printf("---table(%d)---\n", tbl->tbl);
5907         for (a = 0; a < tbl->cnt; a++) {
5908                 unsigned int tval;
5909                 tval = tbl->ent[a].value;
5910                 if (co.do_value_as_ip) {
5911                         char tbuf[128];
5912                         strncpy(tbuf, inet_ntoa(*(struct in_addr *)
5913                                 &tbl->ent[a].addr), 127);
5914                         /* inet_ntoa expects network order */
5915                         tval = htonl(tval);
5916                         printf("%s/%u %s\n", tbuf, tbl->ent[a].masklen,
5917                                 inet_ntoa(*(struct in_addr *)&tval));
5918                 } else {
5919                         printf("%s/%u %u\n",
5920                                 inet_ntoa(*(struct in_addr *)&tbl->ent[a].addr),
5921                                 tbl->ent[a].masklen, tval);
5922                 }
5923         }
5924         free(tbl);
5925 }
5926
5927 void
5928 ipfw_show_nat(int ac, char **av)
5929 {
5930         struct cfg_nat *n;
5931         struct cfg_redir *e;
5932         int cmd, i, nbytes, do_cfg, do_rule, frule, lrule, nalloc, size;
5933         int nat_cnt, redir_cnt, r;
5934         uint8_t *data, *p;
5935         char *endptr;
5936
5937         do_rule = 0;
5938         nalloc = 1024;
5939         size = 0;
5940         data = NULL;
5941         frule = 0;
5942         lrule = IPFW_DEFAULT_RULE; /* max ipfw rule number */
5943         ac--; av++;
5944
5945         if (co.test_only)
5946                 return;
5947
5948         /* Parse parameters. */
5949         for (cmd = IP_FW_NAT_GET_LOG, do_cfg = 0; ac != 0; ac--, av++) {
5950                 if (!strncmp(av[0], "config", strlen(av[0]))) {
5951                         cmd = IP_FW_NAT_GET_CONFIG, do_cfg = 1;
5952                         continue;
5953                 }
5954                 /* Convert command line rule #. */
5955                 frule = lrule = strtoul(av[0], &endptr, 10);
5956                 if (*endptr == '-')
5957                         lrule = strtoul(endptr+1, &endptr, 10);
5958                 if (lrule == 0)
5959                         err(EX_USAGE, "invalid rule number: %s", av[0]);
5960                 do_rule = 1;
5961         }
5962
5963         nbytes = nalloc;
5964         while (nbytes >= nalloc) {
5965                 nalloc = nalloc * 2;
5966                 nbytes = nalloc;
5967                 data = safe_realloc(data, nbytes);
5968                 if (do_cmd(cmd, data, (uintptr_t)&nbytes) < 0)
5969                         err(EX_OSERR, "getsockopt(IP_FW_GET_%s)",
5970                             (cmd == IP_FW_NAT_GET_LOG) ? "LOG" : "CONFIG");
5971         }
5972         if (nbytes == 0)
5973                 exit(0);
5974         if (do_cfg) {
5975                 nat_cnt = *((int *)data);
5976                 for (i = sizeof(nat_cnt); nat_cnt; nat_cnt--) {
5977                         n = (struct cfg_nat *)&data[i];
5978                         if (frule <= n->id && lrule >= n->id)
5979                                 print_nat_config(&data[i]);
5980                         i += sizeof(struct cfg_nat);
5981                         for (redir_cnt = 0; redir_cnt < n->redir_cnt; redir_cnt++) {
5982                                 e = (struct cfg_redir *)&data[i];
5983                                 i += sizeof(struct cfg_redir) + e->spool_cnt *
5984                                     sizeof(struct cfg_spool);
5985                         }
5986                 }
5987         } else {
5988                 for (i = 0; 1; i += LIBALIAS_BUF_SIZE + sizeof(int)) {
5989                         p = &data[i];
5990                         if (p == data + nbytes)
5991                                 break;
5992                         bcopy(p, &r, sizeof(int));
5993                         if (do_rule) {
5994                                 if (!(frule <= r && lrule >= r))
5995                                         continue;
5996                         }
5997                         printf("nat %u: %s\n", r, p+sizeof(int));
5998                 }
5999         }
6000 }