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/param.h>
  24 #include <sys/mbuf.h>
  25 #include <sys/socket.h>
  26 #include <sys/sockio.h>
  27 #include <sys/sysctl.h>
  28 #include <sys/time.h>
  29 #include <sys/wait.h>
  30 #include <sys/queue.h>
  31
  32 #include <ctype.h>
  33 #include <err.h>
  34 #include <errno.h>
  35 #include <grp.h>
  36 #include <limits.h>
  37 #include <netdb.h>
  38 #include <pwd.h>
  39 #include <signal.h>
  40 #include <stdio.h>
  41 #include <stdlib.h>
  42 #include <stdarg.h>
  43 #include <string.h>
  44 #include <timeconv.h>   /* XXX do we need this ? */
  45 #include <unistd.h>
  46 #include <sysexits.h>
  47 #include <unistd.h>
  48 #include <fcntl.h>
  49
  50 #include <net/if.h>
  51 #include <net/pfvar.h>
  52 #include <net/route.h> /* def. of struct route */
  53 #include <netinet/in.h>
  54 #include <netinet/in_systm.h>
  55 #include <netinet/ip.h>
  56 #include <netinet/ip_icmp.h>
  57 #include <netinet/icmp6.h>
  58 #include <netinet/ip_fw.h>
  59 #include <netinet/ip_dummynet.h>
  60 #include <netinet/tcp.h>
  61 #include <arpa/inet.h>
  62
  63 int
  64                 do_resolv,              /* Would try to resolve all */
  65                 do_time,                /* Show time stamps */
  66                 do_quiet,               /* Be quiet in add and flush */
  67                 do_pipe,                /* this cmd refers to a pipe */
  68                 do_sort,                /* field to sort results (0 = no) */
  69                 do_dynamic,             /* display dynamic rules */
  70                 do_expired,             /* display expired dynamic rules */
  71                 do_compact,             /* show rules in compact mode */
  72                 do_force,               /* do not ask for confirmation */
  73                 show_sets,              /* display rule sets */
  74                 test_only,              /* only check syntax */
  75                 comment_only,           /* only print action and comment */
  76                 verbose;
  77
  78 #define IP_MASK_ALL     0xffffffff
  79 /*
  80  * the following macro returns an error message if we run out of
  81  * arguments.
  82  */
  83 #define NEED1(msg)      {if (!ac) errx(EX_USAGE, msg);}
  84
  85 /*
  86  * _s_x is a structure that stores a string <-> token pairs, used in
  87  * various places in the parser. Entries are stored in arrays,
  88  * with an entry with s=NULL as terminator.
  89  * The search routines are match_token() and match_value().
  90  * Often, an element with x=0 contains an error string.
  91  *
  92  */
  93 struct _s_x {
  94         char const *s;
  95         int x;
  96 };
  97
  98 static struct _s_x f_tcpflags[] = {
  99         { "syn", TH_SYN },
 100         { "fin", TH_FIN },
 101         { "ack", TH_ACK },
 102         { "psh", TH_PUSH },
 103         { "rst", TH_RST },
 104         { "urg", TH_URG },
 105         { "tcp flag", 0 },
 106         { NULL, 0 }
 107 };
 108
 109 static struct _s_x f_tcpopts[] = {
 110         { "mss",        IP_FW_TCPOPT_MSS },
 111         { "maxseg",     IP_FW_TCPOPT_MSS },
 112         { "window",     IP_FW_TCPOPT_WINDOW },
 113         { "sack",       IP_FW_TCPOPT_SACK },
 114         { "ts",         IP_FW_TCPOPT_TS },
 115         { "timestamp",  IP_FW_TCPOPT_TS },
 116         { "cc",         IP_FW_TCPOPT_CC },
 117         { "tcp option", 0 },
 118         { NULL, 0 }
 119 };
 120
 121 /*
 122  * IP options span the range 0 to 255 so we need to remap them
 123  * (though in fact only the low 5 bits are significant).
 124  */
 125 static struct _s_x f_ipopts[] = {
 126         { "ssrr",       IP_FW_IPOPT_SSRR},
 127         { "lsrr",       IP_FW_IPOPT_LSRR},
 128         { "rr",         IP_FW_IPOPT_RR},
 129         { "ts",         IP_FW_IPOPT_TS},
 130         { "ip option",  0 },
 131         { NULL, 0 }
 132 };
 133
 134 static struct _s_x f_iptos[] = {
 135         { "lowdelay",   IPTOS_LOWDELAY},
 136         { "throughput", IPTOS_THROUGHPUT},
 137         { "reliability", IPTOS_RELIABILITY},
 138         { "mincost",    IPTOS_MINCOST},
 139         { "congestion", IPTOS_CE},
 140         { "ecntransport", IPTOS_ECT},
 141         { "ip tos option", 0},
 142         { NULL, 0 }
 143 };
 144
 145 static struct _s_x limit_masks[] = {
 146         {"all",         DYN_SRC_ADDR|DYN_SRC_PORT|DYN_DST_ADDR|DYN_DST_PORT},
 147         {"src-addr",    DYN_SRC_ADDR},
 148         {"src-port",    DYN_SRC_PORT},
 149         {"dst-addr",    DYN_DST_ADDR},
 150         {"dst-port",    DYN_DST_PORT},
 151         {NULL,          0}
 152 };
 153
 154 /*
 155  * we use IPPROTO_ETHERTYPE as a fake protocol id to call the print routines
 156  * This is only used in this code.
 157  */
 158 #define IPPROTO_ETHERTYPE       0x1000
 159 static struct _s_x ether_types[] = {
 160     /*
 161      * Note, we cannot use "-:&/" in the names because they are field
 162      * separators in the type specifications. Also, we use s = NULL as
 163      * end-delimiter, because a type of 0 can be legal.
 164      */
 165         { "ip",         0x0800 },
 166         { "ipv4",       0x0800 },
 167         { "ipv6",       0x86dd },
 168         { "arp",        0x0806 },
 169         { "rarp",       0x8035 },
 170         { "vlan",       0x8100 },
 171         { "loop",       0x9000 },
 172         { "trail",      0x1000 },
 173         { "at",         0x809b },
 174         { "atalk",      0x809b },
 175         { "aarp",       0x80f3 },
 176         { "pppoe_disc", 0x8863 },
 177         { "pppoe_sess", 0x8864 },
 178         { "ipx_8022",   0x00E0 },
 179         { "ipx_8023",   0x0000 },
 180         { "ipx_ii",     0x8137 },
 181         { "ipx_snap",   0x8137 },
 182         { "ipx",        0x8137 },
 183         { "ns",         0x0600 },
 184         { NULL,         0 }
 185 };
 186
 187 static void show_usage(void);
 188
 189 enum tokens {
 190         TOK_NULL=0,
 191
 192         TOK_OR,
 193         TOK_NOT,
 194         TOK_STARTBRACE,
 195         TOK_ENDBRACE,
 196
 197         TOK_ACCEPT,
 198         TOK_COUNT,
 199         TOK_PIPE,
 200         TOK_QUEUE,
 201         TOK_DIVERT,
 202         TOK_TEE,
 203         TOK_NETGRAPH,
 204         TOK_NGTEE,
 205         TOK_FORWARD,
 206         TOK_SKIPTO,
 207         TOK_DENY,
 208         TOK_REJECT,
 209         TOK_RESET,
 210         TOK_UNREACH,
 211         TOK_CHECKSTATE,
 212
 213         TOK_ALTQ,
 214         TOK_LOG,
 215
 216         TOK_UID,
 217         TOK_GID,
 218         TOK_JAIL,
 219         TOK_IN,
 220         TOK_LIMIT,
 221         TOK_KEEPSTATE,
 222         TOK_LAYER2,
 223         TOK_OUT,
 224         TOK_DIVERTED,
 225         TOK_DIVERTEDLOOPBACK,
 226         TOK_DIVERTEDOUTPUT,
 227         TOK_XMIT,
 228         TOK_RECV,
 229         TOK_VIA,
 230         TOK_FRAG,
 231         TOK_IPOPTS,
 232         TOK_IPLEN,
 233         TOK_IPID,
 234         TOK_IPPRECEDENCE,
 235         TOK_IPTOS,
 236         TOK_IPTTL,
 237         TOK_IPVER,
 238         TOK_ESTAB,
 239         TOK_SETUP,
 240         TOK_TCPDATALEN,
 241         TOK_TCPFLAGS,
 242         TOK_TCPOPTS,
 243         TOK_TCPSEQ,
 244         TOK_TCPACK,
 245         TOK_TCPWIN,
 246         TOK_ICMPTYPES,
 247         TOK_MAC,
 248         TOK_MACTYPE,
 249         TOK_VERREVPATH,
 250         TOK_VERSRCREACH,
 251         TOK_ANTISPOOF,
 252         TOK_IPSEC,
 253         TOK_COMMENT,
 254
 255         TOK_PLR,
 256         TOK_NOERROR,
 257         TOK_BUCKETS,
 258         TOK_DSTIP,
 259         TOK_SRCIP,
 260         TOK_DSTPORT,
 261         TOK_SRCPORT,
 262         TOK_ALL,
 263         TOK_MASK,
 264         TOK_BW,
 265         TOK_DELAY,
 266         TOK_RED,
 267         TOK_GRED,
 268         TOK_DROPTAIL,
 269         TOK_PROTO,
 270         TOK_WEIGHT,
 271
 272         TOK_IPV6,
 273         TOK_FLOWID,
 274         TOK_ICMP6TYPES,
 275         TOK_EXT6HDR,
 276         TOK_DSTIP6,
 277         TOK_SRCIP6,
 278
 279         TOK_IPV4,
 280         TOK_UNREACH6,
 281         TOK_RESET6,
 282 };
 283
 284 struct _s_x dummynet_params[] = {
 285         { "plr",                TOK_PLR },
 286         { "noerror",            TOK_NOERROR },
 287         { "buckets",            TOK_BUCKETS },
 288         { "dst-ip",             TOK_DSTIP },
 289         { "src-ip",             TOK_SRCIP },
 290         { "dst-port",           TOK_DSTPORT },
 291         { "src-port",           TOK_SRCPORT },
 292         { "proto",              TOK_PROTO },
 293         { "weight",             TOK_WEIGHT },
 294         { "all",                TOK_ALL },
 295         { "mask",               TOK_MASK },
 296         { "droptail",           TOK_DROPTAIL },
 297         { "red",                TOK_RED },
 298         { "gred",               TOK_GRED },
 299         { "bw",                 TOK_BW },
 300         { "bandwidth",          TOK_BW },
 301         { "delay",              TOK_DELAY },
 302         { "pipe",               TOK_PIPE },
 303         { "queue",              TOK_QUEUE },
 304         { "flow-id",            TOK_FLOWID},
 305         { "dst-ipv6",           TOK_DSTIP6},
 306         { "dst-ip6",            TOK_DSTIP6},
 307         { "src-ipv6",           TOK_SRCIP6},
 308         { "src-ip6",            TOK_SRCIP6},
 309         { "dummynet-params",    TOK_NULL },
 310         { NULL, 0 }     /* terminator */
 311 };
 312
 313 struct _s_x rule_actions[] = {
 314         { "accept",             TOK_ACCEPT },
 315         { "pass",               TOK_ACCEPT },
 316         { "allow",              TOK_ACCEPT },
 317         { "permit",             TOK_ACCEPT },
 318         { "count",              TOK_COUNT },
 319         { "pipe",               TOK_PIPE },
 320         { "queue",              TOK_QUEUE },
 321         { "divert",             TOK_DIVERT },
 322         { "tee",                TOK_TEE },
 323         { "netgraph",           TOK_NETGRAPH },
 324         { "ngtee",              TOK_NGTEE },
 325         { "fwd",                TOK_FORWARD },
 326         { "forward",            TOK_FORWARD },
 327         { "skipto",             TOK_SKIPTO },
 328         { "deny",               TOK_DENY },
 329         { "drop",               TOK_DENY },
 330         { "reject",             TOK_REJECT },
 331         { "reset6",             TOK_RESET6 },
 332         { "reset",              TOK_RESET },
 333         { "unreach6",           TOK_UNREACH6 },
 334         { "unreach",            TOK_UNREACH },
 335         { "check-state",        TOK_CHECKSTATE },
 336         { "//",                 TOK_COMMENT },
 337         { NULL, 0 }     /* terminator */
 338 };
 339
 340 struct _s_x rule_action_params[] = {
 341         { "altq",               TOK_ALTQ },
 342         { "log",                TOK_LOG },
 343         { NULL, 0 }     /* terminator */
 344 };
 345
 346 struct _s_x rule_options[] = {
 347         { "uid",                TOK_UID },
 348         { "gid",                TOK_GID },
 349         { "jail",               TOK_JAIL },
 350         { "in",                 TOK_IN },
 351         { "limit",              TOK_LIMIT },
 352         { "keep-state",         TOK_KEEPSTATE },
 353         { "bridged",            TOK_LAYER2 },
 354         { "layer2",             TOK_LAYER2 },
 355         { "out",                TOK_OUT },
 356         { "diverted",           TOK_DIVERTED },
 357         { "diverted-loopback",  TOK_DIVERTEDLOOPBACK },
 358         { "diverted-output",    TOK_DIVERTEDOUTPUT },
 359         { "xmit",               TOK_XMIT },
 360         { "recv",               TOK_RECV },
 361         { "via",                TOK_VIA },
 362         { "fragment",           TOK_FRAG },
 363         { "frag",               TOK_FRAG },
 364         { "ipoptions",          TOK_IPOPTS },
 365         { "ipopts",             TOK_IPOPTS },
 366         { "iplen",              TOK_IPLEN },
 367         { "ipid",               TOK_IPID },
 368         { "ipprecedence",       TOK_IPPRECEDENCE },
 369         { "iptos",              TOK_IPTOS },
 370         { "ipttl",              TOK_IPTTL },
 371         { "ipversion",          TOK_IPVER },
 372         { "ipver",              TOK_IPVER },
 373         { "estab",              TOK_ESTAB },
 374         { "established",        TOK_ESTAB },
 375         { "setup",              TOK_SETUP },
 376         { "tcpdatalen",         TOK_TCPDATALEN },
 377         { "tcpflags",           TOK_TCPFLAGS },
 378         { "tcpflgs",            TOK_TCPFLAGS },
 379         { "tcpoptions",         TOK_TCPOPTS },
 380         { "tcpopts",            TOK_TCPOPTS },
 381         { "tcpseq",             TOK_TCPSEQ },
 382         { "tcpack",             TOK_TCPACK },
 383         { "tcpwin",             TOK_TCPWIN },
 384         { "icmptype",           TOK_ICMPTYPES },
 385         { "icmptypes",          TOK_ICMPTYPES },
 386         { "dst-ip",             TOK_DSTIP },
 387         { "src-ip",             TOK_SRCIP },
 388         { "dst-port",           TOK_DSTPORT },
 389         { "src-port",           TOK_SRCPORT },
 390         { "proto",              TOK_PROTO },
 391         { "MAC",                TOK_MAC },
 392         { "mac",                TOK_MAC },
 393         { "mac-type",           TOK_MACTYPE },
 394         { "verrevpath",         TOK_VERREVPATH },
 395         { "versrcreach",        TOK_VERSRCREACH },
 396         { "antispoof",          TOK_ANTISPOOF },
 397         { "ipsec",              TOK_IPSEC },
 398         { "icmp6type",          TOK_ICMP6TYPES },
 399         { "icmp6types",         TOK_ICMP6TYPES },
 400         { "ext6hdr",            TOK_EXT6HDR},
 401         { "flow-id",            TOK_FLOWID},
 402         { "ipv6",               TOK_IPV6},
 403         { "ip6",                TOK_IPV6},
 404         { "ipv4",               TOK_IPV4},
 405         { "ip4",                TOK_IPV4},
 406         { "dst-ipv6",           TOK_DSTIP6},
 407         { "dst-ip6",            TOK_DSTIP6},
 408         { "src-ipv6",           TOK_SRCIP6},
 409         { "src-ip6",            TOK_SRCIP6},
 410         { "//",                 TOK_COMMENT },
 411
 412         { "not",                TOK_NOT },              /* pseudo option */
 413         { "!", /* escape ? */   TOK_NOT },              /* pseudo option */
 414         { "or",                 TOK_OR },               /* pseudo option */
 415         { "|", /* escape */     TOK_OR },               /* pseudo option */
 416         { "{",                  TOK_STARTBRACE },       /* pseudo option */
 417         { "(",                  TOK_STARTBRACE },       /* pseudo option */
 418         { "}",                  TOK_ENDBRACE },         /* pseudo option */
 419         { ")",                  TOK_ENDBRACE },         /* pseudo option */
 420         { NULL, 0 }     /* terminator */
 421 };
 422
 423 #define TABLEARG        "tablearg"
 424
 425 static __inline uint64_t
 426 align_uint64(uint64_t *pll) {
 427         uint64_t ret;
 428
 429         bcopy (pll, &ret, sizeof(ret));
 430         return ret;
 431 }
 432
 433 /*
 434  * conditionally runs the command.
 435  */
 436 static int
 437 do_cmd(int optname, void *optval, uintptr_t optlen)
 438 {
 439         static int s = -1;      /* the socket */
 440         int i;
 441
 442         if (test_only)
 443                 return 0;
 444
 445         if (s == -1)
 446                 s = socket(AF_INET, SOCK_RAW, IPPROTO_RAW);
 447         if (s < 0)
 448                 err(EX_UNAVAILABLE, "socket");
 449
 450         if (optname == IP_FW_GET || optname == IP_DUMMYNET_GET ||
 451             optname == IP_FW_ADD || optname == IP_FW_TABLE_LIST ||
 452             optname == IP_FW_TABLE_GETSIZE)
 453                 i = getsockopt(s, IPPROTO_IP, optname, optval,
 454                         (socklen_t *)optlen);
 455         else
 456                 i = setsockopt(s, IPPROTO_IP, optname, optval, optlen);
 457         return i;
 458 }
 459
 460 /**
 461  * match_token takes a table and a string, returns the value associated
 462  * with the string (-1 in case of failure).
 463  */
 464 static int
 465 match_token(struct _s_x *table, char *string)
 466 {
 467         struct _s_x *pt;
 468         uint i = strlen(string);
 469
 470         for (pt = table ; i && pt->s != NULL ; pt++)
 471                 if (strlen(pt->s) == i && !bcmp(string, pt->s, i))
 472                         return pt->x;
 473         return -1;
 474 }
 475
 476 /**
 477  * match_value takes a table and a value, returns the string associated
 478  * with the value (NULL in case of failure).
 479  */
 480 static char const *
 481 match_value(struct _s_x *p, int value)
 482 {
 483         for (; p->s != NULL; p++)
 484                 if (p->x == value)
 485                         return p->s;
 486         return NULL;
 487 }
 488
 489 /*
 490  * _substrcmp takes two strings and returns 1 if they do not match,
 491  * and 0 if they match exactly or the first string is a sub-string
 492  * of the second.  A warning is printed to stderr in the case that the
 493  * first string is a sub-string of the second.
 494  *
 495  * This function will be removed in the future through the usual
 496  * deprecation process.
 497  */
 498 static int
 499 _substrcmp(const char *str1, const char* str2)
 500 {
 501
 502         if (strncmp(str1, str2, strlen(str1)) != 0)
 503                 return 1;
 504
 505         if (strlen(str1) != strlen(str2))
 506                 warnx("DEPRECATED: '%s' matched '%s' as a sub-string",
 507                     str1, str2);
 508         return 0;
 509 }
 510
 511 /*
 512  * _substrcmp2 takes three strings and returns 1 if the first two do not match,
 513  * and 0 if they match exactly or the second string is a sub-string
 514  * of the first.  A warning is printed to stderr in the case that the
 515  * first string does not match the third.
 516  *
 517  * This function exists to warn about the bizzare construction
 518  * strncmp(str, "by", 2) which is used to allow people to use a shotcut
 519  * for "bytes".  The problem is that in addition to accepting "by",
 520  * "byt", "byte", and "bytes", it also excepts "by_rabid_dogs" and any
 521  * other string beginning with "by".
 522  *
 523  * This function will be removed in the future through the usual
 524  * deprecation process.
 525  */
 526 static int
 527 _substrcmp2(const char *str1, const char* str2, const char* str3)
 528 {
 529
 530         if (strncmp(str1, str2, strlen(str2)) != 0)
 531                 return 1;
 532
 533         if (strcmp(str1, str3) != 0)
 534                 warnx("DEPRECATED: '%s' matched '%s'",
 535                     str1, str3);
 536         return 0;
 537 }
 538
 539 /*
 540  * prints one port, symbolic or numeric
 541  */
 542 static void
 543 print_port(int proto, uint16_t port)
 544 {
 545
 546         if (proto == IPPROTO_ETHERTYPE) {
 547                 char const *s;
 548
 549                 if (do_resolv && (s = match_value(ether_types, port)) )
 550                         printf("%s", s);
 551                 else
 552                         printf("0x%04x", port);
 553         } else {
 554                 struct servent *se = NULL;
 555                 if (do_resolv) {
 556                         struct protoent *pe = getprotobynumber(proto);
 557
 558                         se = getservbyport(htons(port), pe ? pe->p_name : NULL);
 559                 }
 560                 if (se)
 561                         printf("%s", se->s_name);
 562                 else
 563                         printf("%d", port);
 564         }
 565 }
 566
 567 struct _s_x _port_name[] = {
 568         {"dst-port",    O_IP_DSTPORT},
 569         {"src-port",    O_IP_SRCPORT},
 570         {"ipid",        O_IPID},
 571         {"iplen",       O_IPLEN},
 572         {"ipttl",       O_IPTTL},
 573         {"mac-type",    O_MAC_TYPE},
 574         {"tcpdatalen",  O_TCPDATALEN},
 575         {NULL,          0}
 576 };
 577
 578 /*
 579  * Print the values in a list 16-bit items of the types above.
 580  * XXX todo: add support for mask.
 581  */
 582 static void
 583 print_newports(ipfw_insn_u16 *cmd, int proto, int opcode)
 584 {
 585         uint16_t *p = cmd->ports;
 586         int i;
 587         char const *sep;
 588
 589         if (cmd->o.len & F_NOT)
 590                 printf(" not");
 591         if (opcode != 0) {
 592                 sep = match_value(_port_name, opcode);
 593                 if (sep == NULL)
 594                         sep = "???";
 595                 printf (" %s", sep);
 596         }
 597         sep = " ";
 598         for (i = F_LEN((ipfw_insn *)cmd) - 1; i > 0; i--, p += 2) {
 599                 printf(sep);
 600                 print_port(proto, p[0]);
 601                 if (p[0] != p[1]) {
 602                         printf("-");
 603                         print_port(proto, p[1]);
 604                 }
 605                 sep = ",";
 606         }
 607 }
 608
 609 /*
 610  * Like strtol, but also translates service names into port numbers
 611  * for some protocols.
 612  * In particular:
 613  *      proto == -1 disables the protocol check;
 614  *      proto == IPPROTO_ETHERTYPE looks up an internal table
 615  *      proto == <some value in /etc/protocols> matches the values there.
 616  * Returns *end == s in case the parameter is not found.
 617  */
 618 static int
 619 strtoport(char *s, char **end, int base, int proto)
 620 {
 621         char *p, *buf;
 622         char *s1;
 623         int i;
 624
 625         *end = s;               /* default - not found */
 626         if (*s == '\0')
 627                 return 0;       /* not found */
 628
 629         if (isdigit(*s))
 630                 return strtol(s, end, base);
 631
 632         /*
 633          * find separator. '\\' escapes the next char.
 634          */
 635         for (s1 = s; *s1 && (isalnum(*s1) || *s1 == '\\') ; s1++)
 636                 if (*s1 == '\\' && s1[1] != '\0')
 637                         s1++;
 638
 639         buf = malloc(s1 - s + 1);
 640         if (buf == NULL)
 641                 return 0;
 642
 643         /*
 644          * copy into a buffer skipping backslashes
 645          */
 646         for (p = s, i = 0; p != s1 ; p++)
 647                 if (*p != '\\')
 648                         buf[i++] = *p;
 649         buf[i++] = '\0';
 650
 651         if (proto == IPPROTO_ETHERTYPE) {
 652                 i = match_token(ether_types, buf);
 653                 free(buf);
 654                 if (i != -1) {  /* found */
 655                         *end = s1;
 656                         return i;
 657                 }
 658         } else {
 659                 struct protoent *pe = NULL;
 660                 struct servent *se;
 661
 662                 if (proto != 0)
 663                         pe = getprotobynumber(proto);
 664                 setservent(1);
 665                 se = getservbyname(buf, pe ? pe->p_name : NULL);
 666                 free(buf);
 667                 if (se != NULL) {
 668                         *end = s1;
 669                         return ntohs(se->s_port);
 670                 }
 671         }
 672         return 0;       /* not found */
 673 }
 674
 675 /*
 676  * Map between current altq queue id numbers and names.
 677  */
 678 static int altq_fetched = 0;
 679 static TAILQ_HEAD(, pf_altq) altq_entries =
 680         TAILQ_HEAD_INITIALIZER(altq_entries);
 681
 682 static void
 683 altq_set_enabled(int enabled)
 684 {
 685         int pffd;
 686
 687         pffd = open("/dev/pf", O_RDWR);
 688         if (pffd == -1)
 689                 err(EX_UNAVAILABLE,
 690                     "altq support opening pf(4) control device");
 691         if (enabled) {
 692                 if (ioctl(pffd, DIOCSTARTALTQ) != 0 && errno != EEXIST)
 693                         err(EX_UNAVAILABLE, "enabling altq");
 694         } else {
 695                 if (ioctl(pffd, DIOCSTOPALTQ) != 0 && errno != ENOENT)
 696                         err(EX_UNAVAILABLE, "disabling altq");
 697         }
 698         close(pffd);
 699 }
 700
 701 static void
 702 altq_fetch()
 703 {
 704         struct pfioc_altq pfioc;
 705         struct pf_altq *altq;
 706         int pffd, mnr;
 707
 708         if (altq_fetched)
 709                 return;
 710         altq_fetched = 1;
 711         pffd = open("/dev/pf", O_RDONLY);
 712         if (pffd == -1) {
 713                 warn("altq support opening pf(4) control device");
 714                 return;
 715         }
 716         bzero(&pfioc, sizeof(pfioc));
 717         if (ioctl(pffd, DIOCGETALTQS, &pfioc) != 0) {
 718                 warn("altq support getting queue list");
 719                 close(pffd);
 720                 return;
 721         }
 722         mnr = pfioc.nr;
 723         for (pfioc.nr = 0; pfioc.nr < mnr; pfioc.nr++) {
 724                 if (ioctl(pffd, DIOCGETALTQ, &pfioc) != 0) {
 725                         if (errno == EBUSY)
 726                                 break;
 727                         warn("altq support getting queue list");
 728                         close(pffd);
 729                         return;
 730                 }
 731                 if (pfioc.altq.qid == 0)
 732                         continue;
 733                 altq = malloc(sizeof(*altq));
 734                 if (altq == NULL)
 735                         err(EX_OSERR, "malloc");
 736                 *altq = pfioc.altq;
 737                 TAILQ_INSERT_TAIL(&altq_entries, altq, entries);
 738         }
 739         close(pffd);
 740 }
 741
 742 static u_int32_t
 743 altq_name_to_qid(const char *name)
 744 {
 745         struct pf_altq *altq;
 746
 747         altq_fetch();
 748         TAILQ_FOREACH(altq, &altq_entries, entries)
 749                 if (strcmp(name, altq->qname) == 0)
 750                         break;
 751         if (altq == NULL)
 752                 errx(EX_DATAERR, "altq has no queue named `%s'", name);
 753         return altq->qid;
 754 }
 755
 756 static const char *
 757 altq_qid_to_name(u_int32_t qid)
 758 {
 759         struct pf_altq *altq;
 760
 761         altq_fetch();
 762         TAILQ_FOREACH(altq, &altq_entries, entries)
 763                 if (qid == altq->qid)
 764                         break;
 765         if (altq == NULL)
 766                 return NULL;
 767         return altq->qname;
 768 }
 769
 770 static void
 771 fill_altq_qid(u_int32_t *qid, const char *av)
 772 {
 773         *qid = altq_name_to_qid(av);
 774 }
 775
 776 /*
 777  * Fill the body of the command with the list of port ranges.
 778  */
 779 static int
 780 fill_newports(ipfw_insn_u16 *cmd, char *av, int proto)
 781 {
 782         uint16_t a, b, *p = cmd->ports;
 783         int i = 0;
 784         char *s = av;
 785
 786         while (*s) {
 787                 a = strtoport(av, &s, 0, proto);
 788                 if (s == av) /* no parameter */
 789                         break;
 790                 if (*s == '-') { /* a range */
 791                         av = s+1;
 792                         b = strtoport(av, &s, 0, proto);
 793                         if (s == av) /* no parameter */
 794                                 break;
 795                         p[0] = a;
 796                         p[1] = b;
 797                 } else if (*s == ',' || *s == '\0' )
 798                         p[0] = p[1] = a;
 799                 else    /* invalid separator */
 800                         errx(EX_DATAERR, "invalid separator <%c> in <%s>\n",
 801                                 *s, av);
 802                 i++;
 803                 p += 2;
 804                 av = s+1;
 805         }
 806         if (i > 0) {
 807                 if (i+1 > F_LEN_MASK)
 808                         errx(EX_DATAERR, "too many ports/ranges\n");
 809                 cmd->o.len |= i+1; /* leave F_NOT and F_OR untouched */
 810         }
 811         return i;
 812 }
 813
 814 static struct _s_x icmpcodes[] = {
 815       { "net",                  ICMP_UNREACH_NET },
 816       { "host",                 ICMP_UNREACH_HOST },
 817       { "protocol",             ICMP_UNREACH_PROTOCOL },
 818       { "port",                 ICMP_UNREACH_PORT },
 819       { "needfrag",             ICMP_UNREACH_NEEDFRAG },
 820       { "srcfail",              ICMP_UNREACH_SRCFAIL },
 821       { "net-unknown",          ICMP_UNREACH_NET_UNKNOWN },
 822       { "host-unknown",         ICMP_UNREACH_HOST_UNKNOWN },
 823       { "isolated",             ICMP_UNREACH_ISOLATED },
 824       { "net-prohib",           ICMP_UNREACH_NET_PROHIB },
 825       { "host-prohib",          ICMP_UNREACH_HOST_PROHIB },
 826       { "tosnet",               ICMP_UNREACH_TOSNET },
 827       { "toshost",              ICMP_UNREACH_TOSHOST },
 828       { "filter-prohib",        ICMP_UNREACH_FILTER_PROHIB },
 829       { "host-precedence",      ICMP_UNREACH_HOST_PRECEDENCE },
 830       { "precedence-cutoff",    ICMP_UNREACH_PRECEDENCE_CUTOFF },
 831       { NULL, 0 }
 832 };
 833
 834 static void
 835 fill_reject_code(u_short *codep, char *str)
 836 {
 837         int val;
 838         char *s;
 839
 840         val = strtoul(str, &s, 0);
 841         if (s == str || *s != '\0' || val >= 0x100)
 842                 val = match_token(icmpcodes, str);
 843         if (val < 0)
 844                 errx(EX_DATAERR, "unknown ICMP unreachable code ``%s''", str);
 845         *codep = val;
 846         return;
 847 }
 848
 849 static void
 850 print_reject_code(uint16_t code)
 851 {
 852         char const *s = match_value(icmpcodes, code);
 853
 854         if (s != NULL)
 855                 printf("unreach %s", s);
 856         else
 857                 printf("unreach %u", code);
 858 }
 859
 860 static struct _s_x icmp6codes[] = {
 861       { "no-route",             ICMP6_DST_UNREACH_NOROUTE },
 862       { "admin-prohib",         ICMP6_DST_UNREACH_ADMIN },
 863       { "address",              ICMP6_DST_UNREACH_ADDR },
 864       { "port",                 ICMP6_DST_UNREACH_NOPORT },
 865       { NULL, 0 }
 866 };
 867
 868 static void
 869 fill_unreach6_code(u_short *codep, char *str)
 870 {
 871         int val;
 872         char *s;
 873
 874         val = strtoul(str, &s, 0);
 875         if (s == str || *s != '\0' || val >= 0x100)
 876                 val = match_token(icmp6codes, str);
 877         if (val < 0)
 878                 errx(EX_DATAERR, "unknown ICMPv6 unreachable code ``%s''", str);
 879         *codep = val;
 880         return;
 881 }
 882
 883 static void
 884 print_unreach6_code(uint16_t code)
 885 {
 886         char const *s = match_value(icmp6codes, code);
 887
 888         if (s != NULL)
 889                 printf("unreach6 %s", s);
 890         else
 891                 printf("unreach6 %u", code);
 892 }
 893
 894 /*
 895  * Returns the number of bits set (from left) in a contiguous bitmask,
 896  * or -1 if the mask is not contiguous.
 897  * XXX this needs a proper fix.
 898  * This effectively works on masks in big-endian (network) format.
 899  * when compiled on little endian architectures.
 900  *
 901  * First bit is bit 7 of the first byte -- note, for MAC addresses,
 902  * the first bit on the wire is bit 0 of the first byte.
 903  * len is the max length in bits.
 904  */
 905 static int
 906 contigmask(uint8_t *p, int len)
 907 {
 908         int i, n;
 909
 910         for (i=0; i<len ; i++)
 911                 if ( (p[i/8] & (1 << (7 - (i%8)))) == 0) /* first bit unset */
 912                         break;
 913         for (n=i+1; n < len; n++)
 914                 if ( (p[n/8] & (1 << (7 - (n%8)))) != 0)
 915                         return -1; /* mask not contiguous */
 916         return i;
 917 }
 918
 919 /*
 920  * print flags set/clear in the two bitmasks passed as parameters.
 921  * There is a specialized check for f_tcpflags.
 922  */
 923 static void
 924 print_flags(char const *name, ipfw_insn *cmd, struct _s_x *list)
 925 {
 926         char const *comma = "";
 927         int i;
 928         uint8_t set = cmd->arg1 & 0xff;
 929         uint8_t clear = (cmd->arg1 >> 8) & 0xff;
 930
 931         if (list == f_tcpflags && set == TH_SYN && clear == TH_ACK) {
 932                 printf(" setup");
 933                 return;
 934         }
 935
 936         printf(" %s ", name);
 937         for (i=0; list[i].x != 0; i++) {
 938                 if (set & list[i].x) {
 939                         set &= ~list[i].x;
 940                         printf("%s%s", comma, list[i].s);
 941                         comma = ",";
 942                 }
 943                 if (clear & list[i].x) {
 944                         clear &= ~list[i].x;
 945                         printf("%s!%s", comma, list[i].s);
 946                         comma = ",";
 947                 }
 948         }
 949 }
 950
 951 /*
 952  * Print the ip address contained in a command.
 953  */
 954 static void
 955 print_ip(ipfw_insn_ip *cmd, char const *s)
 956 {
 957         struct hostent *he = NULL;
 958         int len = F_LEN((ipfw_insn *)cmd);
 959         uint32_t *a = ((ipfw_insn_u32 *)cmd)->d;
 960
 961         printf("%s%s ", cmd->o.len & F_NOT ? " not": "", s);
 962
 963         if (cmd->o.opcode == O_IP_SRC_ME || cmd->o.opcode == O_IP_DST_ME) {
 964                 printf("me");
 965                 return;
 966         }
 967         if (cmd->o.opcode == O_IP_SRC_LOOKUP ||
 968             cmd->o.opcode == O_IP_DST_LOOKUP) {
 969                 printf("table(%u", ((ipfw_insn *)cmd)->arg1);
 970                 if (len == F_INSN_SIZE(ipfw_insn_u32))
 971                         printf(",%u", *a);
 972                 printf(")");
 973                 return;
 974         }
 975         if (cmd->o.opcode == O_IP_SRC_SET || cmd->o.opcode == O_IP_DST_SET) {
 976                 uint32_t x, *map = (uint32_t *)&(cmd->mask);
 977                 int i, j;
 978                 char comma = '{';
 979
 980                 x = cmd->o.arg1 - 1;
 981                 x = htonl( ~x );
 982                 cmd->addr.s_addr = htonl(cmd->addr.s_addr);
 983                 printf("%s/%d", inet_ntoa(cmd->addr),
 984                         contigmask((uint8_t *)&x, 32));
 985                 x = cmd->addr.s_addr = htonl(cmd->addr.s_addr);
 986                 x &= 0xff; /* base */
 987                 /*
 988                  * Print bits and ranges.
 989                  * Locate first bit set (i), then locate first bit unset (j).
 990                  * If we have 3+ consecutive bits set, then print them as a
 991                  * range, otherwise only print the initial bit and rescan.
 992                  */
 993                 for (i=0; i < cmd->o.arg1; i++)
 994                         if (map[i/32] & (1<<(i & 31))) {
 995                                 for (j=i+1; j < cmd->o.arg1; j++)
 996                                         if (!(map[ j/32] & (1<<(j & 31))))
 997                                                 break;
 998                                 printf("%c%d", comma, i+x);
 999                                 if (j>i+2) { /* range has at least 3 elements */
1000                                         printf("-%d", j-1+x);
1001                                         i = j-1;
1002                                 }
1003                                 comma = ',';
1004                         }
1005                 printf("}");
1006                 return;
1007         }
1008         /*
1009          * len == 2 indicates a single IP, whereas lists of 1 or more
1010          * addr/mask pairs have len = (2n+1). We convert len to n so we
1011          * use that to count the number of entries.
1012          */
1013     for (len = len / 2; len > 0; len--, a += 2) {
1014         int mb =        /* mask length */
1015             (cmd->o.opcode == O_IP_SRC || cmd->o.opcode == O_IP_DST) ?
1016                 32 : contigmask((uint8_t *)&(a[1]), 32);
1017         if (mb == 32 && do_resolv)
1018                 he = gethostbyaddr((char *)&(a[0]), sizeof(u_long), AF_INET);
1019         if (he != NULL)         /* resolved to name */
1020                 printf("%s", he->h_name);
1021         else if (mb == 0)       /* any */
1022                 printf("any");
1023         else {          /* numeric IP followed by some kind of mask */
1024                 printf("%s", inet_ntoa( *((struct in_addr *)&a[0]) ) );
1025                 if (mb < 0)
1026                         printf(":%s", inet_ntoa( *((struct in_addr *)&a[1]) ) );
1027                 else if (mb < 32)
1028                         printf("/%d", mb);
1029         }
1030         if (len > 1)
1031                 printf(",");
1032     }
1033 }
1034
1035 /*
1036  * prints a MAC address/mask pair
1037  */
1038 static void
1039 print_mac(uint8_t *addr, uint8_t *mask)
1040 {
1041         int l = contigmask(mask, 48);
1042
1043         if (l == 0)
1044                 printf(" any");
1045         else {
1046                 printf(" %02x:%02x:%02x:%02x:%02x:%02x",
1047                     addr[0], addr[1], addr[2], addr[3], addr[4], addr[5]);
1048                 if (l == -1)
1049                         printf("&%02x:%02x:%02x:%02x:%02x:%02x",
1050                             mask[0], mask[1], mask[2],
1051                             mask[3], mask[4], mask[5]);
1052                 else if (l < 48)
1053                         printf("/%d", l);
1054         }
1055 }
1056
1057 static void
1058 fill_icmptypes(ipfw_insn_u32 *cmd, char *av)
1059 {
1060         uint8_t type;
1061
1062         cmd->d[0] = 0;
1063         while (*av) {
1064                 if (*av == ',')
1065                         av++;
1066
1067                 type = strtoul(av, &av, 0);
1068
1069                 if (*av != ',' && *av != '\0')
1070                         errx(EX_DATAERR, "invalid ICMP type");
1071
1072                 if (type > 31)
1073                         errx(EX_DATAERR, "ICMP type out of range");
1074
1075                 cmd->d[0] |= 1 << type;
1076         }
1077         cmd->o.opcode = O_ICMPTYPE;
1078         cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32);
1079 }
1080
1081 static void
1082 print_icmptypes(ipfw_insn_u32 *cmd)
1083 {
1084         int i;
1085         char sep= ' ';
1086
1087         printf(" icmptypes");
1088         for (i = 0; i < 32; i++) {
1089                 if ( (cmd->d[0] & (1 << (i))) == 0)
1090                         continue;
1091                 printf("%c%d", sep, i);
1092                 sep = ',';
1093         }
1094 }
1095
1096 /*
1097  * Print the ip address contained in a command.
1098  */
1099 static void
1100 print_ip6(ipfw_insn_ip6 *cmd, char const *s)
1101 {
1102        struct hostent *he = NULL;
1103        int len = F_LEN((ipfw_insn *) cmd) - 1;
1104        struct in6_addr *a = &(cmd->addr6);
1105        char trad[255];
1106
1107        printf("%s%s ", cmd->o.len & F_NOT ? " not": "", s);
1108
1109        if (cmd->o.opcode == O_IP6_SRC_ME || cmd->o.opcode == O_IP6_DST_ME) {
1110                printf("me6");
1111                return;
1112        }
1113        if (cmd->o.opcode == O_IP6) {
1114                printf(" ip6");
1115                return;
1116        }
1117
1118        /*
1119         * len == 4 indicates a single IP, whereas lists of 1 or more
1120         * addr/mask pairs have len = (2n+1). We convert len to n so we
1121         * use that to count the number of entries.
1122         */
1123
1124        for (len = len / 4; len > 0; len -= 2, a += 2) {
1125            int mb =        /* mask length */
1126                (cmd->o.opcode == O_IP6_SRC || cmd->o.opcode == O_IP6_DST) ?
1127                128 : contigmask((uint8_t *)&(a[1]), 128);
1128
1129            if (mb == 128 && do_resolv)
1130                he = gethostbyaddr((char *)a, sizeof(*a), AF_INET6);
1131            if (he != NULL)             /* resolved to name */
1132                printf("%s", he->h_name);
1133            else if (mb == 0)           /* any */
1134                printf("any");
1135            else {          /* numeric IP followed by some kind of mask */
1136                if (inet_ntop(AF_INET6,  a, trad, sizeof( trad ) ) == NULL)
1137                    printf("Error ntop in print_ip6\n");
1138                printf("%s",  trad );
1139                if (mb < 0)     /* XXX not really legal... */
1140                    printf(":%s",
1141                        inet_ntop(AF_INET6, &a[1], trad, sizeof(trad)));
1142                else if (mb < 128)
1143                    printf("/%d", mb);
1144            }
1145            if (len > 2)
1146                printf(",");
1147        }
1148 }
1149
1150 static void
1151 fill_icmp6types(ipfw_insn_icmp6 *cmd, char *av)
1152 {
1153        uint8_t type;
1154
1155        cmd->d[0] = 0;
1156        while (*av) {
1157            if (*av == ',')
1158                av++;
1159            type = strtoul(av, &av, 0);
1160            if (*av != ',' && *av != '\0')
1161                errx(EX_DATAERR, "invalid ICMP6 type");
1162            /*
1163             * XXX: shouldn't this be 0xFF?  I can't see any reason why
1164             * we shouldn't be able to filter all possiable values
1165             * regardless of the ability of the rest of the kernel to do
1166             * anything useful with them.
1167             */
1168            if (type > ICMP6_MAXTYPE)
1169                errx(EX_DATAERR, "ICMP6 type out of range");
1170            cmd->d[type / 32] |= ( 1 << (type % 32));
1171        }
1172        cmd->o.opcode = O_ICMP6TYPE;
1173        cmd->o.len |= F_INSN_SIZE(ipfw_insn_icmp6);
1174 }
1175
1176
1177 static void
1178 print_icmp6types(ipfw_insn_u32 *cmd)
1179 {
1180        int i, j;
1181        char sep= ' ';
1182
1183        printf(" ip6 icmp6types");
1184        for (i = 0; i < 7; i++)
1185                for (j=0; j < 32; ++j) {
1186                        if ( (cmd->d[i] & (1 << (j))) == 0)
1187                                continue;
1188                        printf("%c%d", sep, (i*32 + j));
1189                        sep = ',';
1190                }
1191 }
1192
1193 static void
1194 print_flow6id( ipfw_insn_u32 *cmd)
1195 {
1196        uint16_t i, limit = cmd->o.arg1;
1197        char sep = ',';
1198
1199        printf(" flow-id ");
1200        for( i=0; i < limit; ++i) {
1201                if (i == limit - 1)
1202                        sep = ' ';
1203                printf("%d%c", cmd->d[i], sep);
1204        }
1205 }
1206
1207 /* structure and define for the extension header in ipv6 */
1208 static struct _s_x ext6hdrcodes[] = {
1209        { "frag",       EXT_FRAGMENT },
1210        { "hopopt",     EXT_HOPOPTS },
1211        { "route",      EXT_ROUTING },
1212        { "dstopt",     EXT_DSTOPTS },
1213        { "ah",         EXT_AH },
1214        { "esp",        EXT_ESP },
1215        { NULL,         0 }
1216 };
1217
1218 /* fills command for the extension header filtering */
1219 int
1220 fill_ext6hdr( ipfw_insn *cmd, char *av)
1221 {
1222        int tok;
1223        char *s = av;
1224
1225        cmd->arg1 = 0;
1226
1227        while(s) {
1228            av = strsep( &s, ",") ;
1229            tok = match_token(ext6hdrcodes, av);
1230            switch (tok) {
1231            case EXT_FRAGMENT:
1232                cmd->arg1 |= EXT_FRAGMENT;
1233                break;
1234
1235            case EXT_HOPOPTS:
1236                cmd->arg1 |= EXT_HOPOPTS;
1237                break;
1238
1239            case EXT_ROUTING:
1240                cmd->arg1 |= EXT_ROUTING;
1241                break;
1242
1243            case EXT_DSTOPTS:
1244                cmd->arg1 |= EXT_DSTOPTS;
1245                break;
1246
1247            case EXT_AH:
1248                cmd->arg1 |= EXT_AH;
1249                break;
1250
1251            case EXT_ESP:
1252                cmd->arg1 |= EXT_ESP;
1253                break;
1254
1255            default:
1256                errx( EX_DATAERR, "invalid option for ipv6 exten header" );
1257                break;
1258            }
1259        }
1260        if (cmd->arg1 == 0 )
1261            return 0;
1262        cmd->opcode = O_EXT_HDR;
1263        cmd->len |= F_INSN_SIZE( ipfw_insn );
1264        return 1;
1265 }
1266
1267 void
1268 print_ext6hdr( ipfw_insn *cmd )
1269 {
1270        char sep = ' ';
1271
1272        printf(" extension header:");
1273        if (cmd->arg1 & EXT_FRAGMENT ) {
1274            printf("%cfragmentation", sep);
1275            sep = ',';
1276        }
1277        if (cmd->arg1 & EXT_HOPOPTS ) {
1278            printf("%chop options", sep);
1279            sep = ',';
1280        }
1281        if (cmd->arg1 & EXT_ROUTING ) {
1282            printf("%crouting options", sep);
1283            sep = ',';
1284        }
1285        if (cmd->arg1 & EXT_DSTOPTS ) {
1286            printf("%cdestination options", sep);
1287            sep = ',';
1288        }
1289        if (cmd->arg1 & EXT_AH ) {
1290            printf("%cauthentication header", sep);
1291            sep = ',';
1292        }
1293        if (cmd->arg1 & EXT_ESP ) {
1294            printf("%cencapsulated security payload", sep);
1295        }
1296 }
1297
1298 /*
1299  * show_ipfw() prints the body of an ipfw rule.
1300  * Because the standard rule has at least proto src_ip dst_ip, we use
1301  * a helper function to produce these entries if not provided explicitly.
1302  * The first argument is the list of fields we have, the second is
1303  * the list of fields we want to be printed.
1304  *
1305  * Special cases if we have provided a MAC header:
1306  *   + if the rule does not contain IP addresses/ports, do not print them;
1307  *   + if the rule does not contain an IP proto, print "all" instead of "ip";
1308  *
1309  * Once we have 'have_options', IP header fields are printed as options.
1310  */
1311 #define HAVE_PROTO      0x0001
1312 #define HAVE_SRCIP      0x0002
1313 #define HAVE_DSTIP      0x0004
1314 #define HAVE_MAC        0x0008
1315 #define HAVE_MACTYPE    0x0010
1316 #define HAVE_PROTO4     0x0040
1317 #define HAVE_PROTO6     0x0080
1318 #define HAVE_OPTIONS    0x8000
1319
1320 #define HAVE_IP         (HAVE_PROTO | HAVE_SRCIP | HAVE_DSTIP)
1321 static void
1322 show_prerequisites(int *flags, int want, int cmd)
1323 {
1324         if (comment_only)
1325                 return;
1326         if ( (*flags & HAVE_IP) == HAVE_IP)
1327                 *flags |= HAVE_OPTIONS;
1328
1329         if ( (*flags & (HAVE_MAC|HAVE_MACTYPE|HAVE_OPTIONS)) == HAVE_MAC &&
1330              cmd != O_MAC_TYPE) {
1331                 /*
1332                  * mac-type was optimized out by the compiler,
1333                  * restore it
1334                  */
1335                 printf(" any");
1336                 *flags |= HAVE_MACTYPE | HAVE_OPTIONS;
1337                 return;
1338         }
1339         if ( !(*flags & HAVE_OPTIONS)) {
1340                 if ( !(*flags & HAVE_PROTO) && (want & HAVE_PROTO))
1341                         if ( (*flags & HAVE_PROTO4))
1342                                 printf(" ip4");
1343                         else if ( (*flags & HAVE_PROTO6))
1344                                 printf(" ip6");
1345                         else
1346                                 printf(" ip");
1347
1348                 if ( !(*flags & HAVE_SRCIP) && (want & HAVE_SRCIP))
1349                         printf(" from any");
1350                 if ( !(*flags & HAVE_DSTIP) && (want & HAVE_DSTIP))
1351                         printf(" to any");
1352         }
1353         *flags |= want;
1354 }
1355
1356 static void
1357 show_ipfw(struct ip_fw *rule, int pcwidth, int bcwidth)
1358 {
1359         static int twidth = 0;
1360         int l;
1361         ipfw_insn *cmd;
1362         char *comment = NULL;   /* ptr to comment if we have one */
1363         int proto = 0;          /* default */
1364         int flags = 0;  /* prerequisites */
1365         ipfw_insn_log *logptr = NULL; /* set if we find an O_LOG */
1366         ipfw_insn_altq *altqptr = NULL; /* set if we find an O_ALTQ */
1367         int or_block = 0;       /* we are in an or block */
1368         uint32_t set_disable;
1369
1370         bcopy(&rule->next_rule, &set_disable, sizeof(set_disable));
1371
1372         if (set_disable & (1 << rule->set)) { /* disabled */
1373                 if (!show_sets)
1374                         return;
1375                 else
1376                         printf("# DISABLED ");
1377         }
1378         printf("%05u ", rule->rulenum);
1379
1380         if (pcwidth>0 || bcwidth>0)
1381                 printf("%*llu %*llu ", pcwidth, align_uint64(&rule->pcnt),
1382                     bcwidth, align_uint64(&rule->bcnt));
1383
1384         if (do_time == 2)
1385                 printf("%10u ", rule->timestamp);
1386         else if (do_time == 1) {
1387                 char timestr[30];
1388                 time_t t = (time_t)0;
1389
1390                 if (twidth == 0) {
1391                         strcpy(timestr, ctime(&t));
1392                         *strchr(timestr, '\n') = '\0';
1393                         twidth = strlen(timestr);
1394                 }
1395                 if (rule->timestamp) {
1396                         t = _long_to_time(rule->timestamp);
1397
1398                         strcpy(timestr, ctime(&t));
1399                         *strchr(timestr, '\n') = '\0';
1400                         printf("%s ", timestr);
1401                 } else {
1402                         printf("%*s", twidth, " ");
1403                 }
1404         }
1405
1406         if (show_sets)
1407                 printf("set %d ", rule->set);
1408
1409         /*
1410          * print the optional "match probability"
1411          */
1412         if (rule->cmd_len > 0) {
1413                 cmd = rule->cmd ;
1414                 if (cmd->opcode == O_PROB) {
1415                         ipfw_insn_u32 *p = (ipfw_insn_u32 *)cmd;
1416                         double d = 1.0 * p->d[0];
1417
1418                         d = (d / 0x7fffffff);
1419                         printf("prob %f ", d);
1420                 }
1421         }
1422
1423         /*
1424          * first print actions
1425          */
1426         for (l = rule->cmd_len - rule->act_ofs, cmd = ACTION_PTR(rule);
1427                         l > 0 ; l -= F_LEN(cmd), cmd += F_LEN(cmd)) {
1428                 switch(cmd->opcode) {
1429                 case O_CHECK_STATE:
1430                         printf("check-state");
1431                         flags = HAVE_IP; /* avoid printing anything else */
1432                         break;
1433
1434                 case O_ACCEPT:
1435                         printf("allow");
1436                         break;
1437
1438                 case O_COUNT:
1439                         printf("count");
1440                         break;
1441
1442                 case O_DENY:
1443                         printf("deny");
1444                         break;
1445
1446                 case O_REJECT:
1447                         if (cmd->arg1 == ICMP_REJECT_RST)
1448                                 printf("reset");
1449                         else if (cmd->arg1 == ICMP_UNREACH_HOST)
1450                                 printf("reject");
1451                         else
1452                                 print_reject_code(cmd->arg1);
1453                         break;
1454
1455                 case O_UNREACH6:
1456                         if (cmd->arg1 == ICMP6_UNREACH_RST)
1457                                 printf("reset6");
1458                         else
1459                                 print_unreach6_code(cmd->arg1);
1460                         break;
1461
1462 #define PRINT_WITH_ARG(o)                                               \
1463                         if (cmd->arg1 == IP_FW_TABLEARG)                \
1464                                 printf("%s tablearg", (o));             \
1465                         else                                            \
1466                                 printf("%s %u", (o), cmd->arg1);        \
1467                         break;
1468
1469                 case O_SKIPTO:
1470                         PRINT_WITH_ARG("skipto");
1471                 case O_PIPE:
1472                         PRINT_WITH_ARG("pipe");
1473                 case O_QUEUE:
1474                         PRINT_WITH_ARG("queue");
1475                 case O_DIVERT:
1476                         PRINT_WITH_ARG("divert");
1477                 case O_TEE:
1478                         PRINT_WITH_ARG("tee");
1479                 case O_NETGRAPH:
1480                         PRINT_WITH_ARG("netgraph");
1481                 case O_NGTEE:
1482                         PRINT_WITH_ARG("ngtee");
1483 #undef PRINT_WITH_ARG
1484
1485                 case O_FORWARD_IP:
1486                     {
1487                         ipfw_insn_sa *s = (ipfw_insn_sa *)cmd;
1488
1489                         printf("fwd %s", inet_ntoa(s->sa.sin_addr));
1490                         if (s->sa.sin_port)
1491                                 printf(",%d", s->sa.sin_port);
1492                     }
1493                         break;
1494
1495                 case O_LOG: /* O_LOG is printed last */
1496                         logptr = (ipfw_insn_log *)cmd;
1497                         break;
1498
1499                 case O_ALTQ: /* O_ALTQ is printed after O_LOG */
1500                         altqptr = (ipfw_insn_altq *)cmd;
1501                         break;
1502
1503                 default:
1504                         printf("** unrecognized action %d len %d ",
1505                                 cmd->opcode, cmd->len);
1506                 }
1507         }
1508         if (logptr) {
1509                 if (logptr->max_log > 0)
1510                         printf(" log logamount %d", logptr->max_log);
1511                 else
1512                         printf(" log");
1513         }
1514         if (altqptr) {
1515                 const char *qname;
1516
1517                 qname = altq_qid_to_name(altqptr->qid);
1518                 if (qname == NULL)
1519                         printf(" altq ?<%u>", altqptr->qid);
1520                 else
1521                         printf(" altq %s", qname);
1522         }
1523
1524         /*
1525          * then print the body.
1526          */
1527         for (l = rule->act_ofs, cmd = rule->cmd ;
1528                         l > 0 ; l -= F_LEN(cmd) , cmd += F_LEN(cmd)) {
1529                 if ((cmd->len & F_OR) || (cmd->len & F_NOT))
1530                         continue;
1531                 if (cmd->opcode == O_IP4) {
1532                         flags |= HAVE_PROTO4;
1533                         break;
1534                 } else if (cmd->opcode == O_IP6) {
1535                         flags |= HAVE_PROTO6;
1536                         break;
1537                 }
1538         }
1539         if (rule->_pad & 1) {   /* empty rules before options */
1540                 if (!do_compact) {
1541                         show_prerequisites(&flags, HAVE_PROTO, 0);
1542                         printf(" from any to any");
1543                 }
1544                 flags |= HAVE_IP | HAVE_OPTIONS;
1545         }
1546
1547         if (comment_only)
1548                 comment = "...";
1549
1550         for (l = rule->act_ofs, cmd = rule->cmd ;
1551                         l > 0 ; l -= F_LEN(cmd) , cmd += F_LEN(cmd)) {
1552                 /* useful alias */
1553                 ipfw_insn_u32 *cmd32 = (ipfw_insn_u32 *)cmd;
1554
1555                 if (comment_only) {
1556                         if (cmd->opcode != O_NOP)
1557                                 continue;
1558                         printf(" // %s\n", (char *)(cmd + 1));
1559                         return;
1560                 }
1561
1562                 show_prerequisites(&flags, 0, cmd->opcode);
1563
1564                 switch(cmd->opcode) {
1565                 case O_PROB:
1566                         break;  /* done already */
1567
1568                 case O_PROBE_STATE:
1569                         break; /* no need to print anything here */
1570
1571                 case O_MACADDR2: {
1572                         ipfw_insn_mac *m = (ipfw_insn_mac *)cmd;
1573
1574                         if ((cmd->len & F_OR) && !or_block)
1575                                 printf(" {");
1576                         if (cmd->len & F_NOT)
1577                                 printf(" not");
1578                         printf(" MAC");
1579                         flags |= HAVE_MAC;
1580                         print_mac(m->addr, m->mask);
1581                         print_mac(m->addr + 6, m->mask + 6);
1582                         }
1583                         break;
1584
1585                 case O_MAC_TYPE:
1586                         if ((cmd->len & F_OR) && !or_block)
1587                                 printf(" {");
1588                         print_newports((ipfw_insn_u16 *)cmd, IPPROTO_ETHERTYPE,
1589                                 (flags & HAVE_OPTIONS) ? cmd->opcode : 0);
1590                         flags |= HAVE_MAC | HAVE_MACTYPE | HAVE_OPTIONS;
1591                         break;
1592
1593                 case O_IP_SRC:
1594                 case O_IP_SRC_LOOKUP:
1595                 case O_IP_SRC_MASK:
1596                 case O_IP_SRC_ME:
1597                 case O_IP_SRC_SET:
1598                         show_prerequisites(&flags, HAVE_PROTO, 0);
1599                         if (!(flags & HAVE_SRCIP))
1600                                 printf(" from");
1601                         if ((cmd->len & F_OR) && !or_block)
1602                                 printf(" {");
1603                         print_ip((ipfw_insn_ip *)cmd,
1604                                 (flags & HAVE_OPTIONS) ? " src-ip" : "");
1605                         flags |= HAVE_SRCIP;
1606                         break;
1607
1608                 case O_IP_DST:
1609                 case O_IP_DST_LOOKUP:
1610                 case O_IP_DST_MASK:
1611                 case O_IP_DST_ME:
1612                 case O_IP_DST_SET:
1613                         show_prerequisites(&flags, HAVE_PROTO|HAVE_SRCIP, 0);
1614                         if (!(flags & HAVE_DSTIP))
1615                                 printf(" to");
1616                         if ((cmd->len & F_OR) && !or_block)
1617                                 printf(" {");
1618                         print_ip((ipfw_insn_ip *)cmd,
1619                                 (flags & HAVE_OPTIONS) ? " dst-ip" : "");
1620                         flags |= HAVE_DSTIP;
1621                         break;
1622
1623                 case O_IP6_SRC:
1624                 case O_IP6_SRC_MASK:
1625                 case O_IP6_SRC_ME:
1626                         show_prerequisites(&flags, HAVE_PROTO, 0);
1627                         if (!(flags & HAVE_SRCIP))
1628                                 printf(" from");
1629                         if ((cmd->len & F_OR) && !or_block)
1630                                 printf(" {");
1631                         print_ip6((ipfw_insn_ip6 *)cmd,
1632                             (flags & HAVE_OPTIONS) ? " src-ip6" : "");
1633                         flags |= HAVE_SRCIP | HAVE_PROTO;
1634                         break;
1635
1636                 case O_IP6_DST:
1637                 case O_IP6_DST_MASK:
1638                 case O_IP6_DST_ME:
1639                         show_prerequisites(&flags, HAVE_PROTO|HAVE_SRCIP, 0);
1640                         if (!(flags & HAVE_DSTIP))
1641                                 printf(" to");
1642                         if ((cmd->len & F_OR) && !or_block)
1643                                 printf(" {");
1644                         print_ip6((ipfw_insn_ip6 *)cmd,
1645                             (flags & HAVE_OPTIONS) ? " dst-ip6" : "");
1646                         flags |= HAVE_DSTIP;
1647                         break;
1648
1649                 case O_FLOW6ID:
1650                 print_flow6id( (ipfw_insn_u32 *) cmd );
1651                 flags |= HAVE_OPTIONS;
1652                 break;
1653
1654                 case O_IP_DSTPORT:
1655                         show_prerequisites(&flags, HAVE_IP, 0);
1656                 case O_IP_SRCPORT:
1657                         show_prerequisites(&flags, HAVE_PROTO|HAVE_SRCIP, 0);
1658                         if ((cmd->len & F_OR) && !or_block)
1659                                 printf(" {");
1660                         print_newports((ipfw_insn_u16 *)cmd, proto,
1661                                 (flags & HAVE_OPTIONS) ? cmd->opcode : 0);
1662                         break;
1663
1664                 case O_PROTO: {
1665                         struct protoent *pe = NULL;
1666
1667                         if ((cmd->len & F_OR) && !or_block)
1668                                 printf(" {");
1669                         if (cmd->len & F_NOT)
1670                                 printf(" not");
1671                         proto = cmd->arg1;
1672                         pe = getprotobynumber(cmd->arg1);
1673                         if ((flags & (HAVE_PROTO4 | HAVE_PROTO6)) &&
1674                             !(flags & HAVE_PROTO))
1675                                 show_prerequisites(&flags,
1676                                     HAVE_IP | HAVE_OPTIONS, 0);
1677                         if (flags & HAVE_OPTIONS)
1678                                 printf(" proto");
1679                         if (pe)
1680                                 printf(" %s", pe->p_name);
1681                         else
1682                                 printf(" %u", cmd->arg1);
1683                         }
1684                         flags |= HAVE_PROTO;
1685                         break;
1686
1687                 default: /*options ... */
1688                         if (!(cmd->len & (F_OR|F_NOT)))
1689                                 if (((cmd->opcode == O_IP6) &&
1690                                     (flags & HAVE_PROTO6)) ||
1691                                     ((cmd->opcode == O_IP4) &&
1692                                     (flags & HAVE_PROTO4)))
1693                                         break;
1694                         show_prerequisites(&flags, HAVE_IP | HAVE_OPTIONS, 0);
1695                         if ((cmd->len & F_OR) && !or_block)
1696                                 printf(" {");
1697                         if (cmd->len & F_NOT && cmd->opcode != O_IN)
1698                                 printf(" not");
1699                         switch(cmd->opcode) {
1700                         case O_FRAG:
1701                                 printf(" frag");
1702                                 break;
1703
1704                         case O_IN:
1705                                 printf(cmd->len & F_NOT ? " out" : " in");
1706                                 break;
1707
1708                         case O_DIVERTED:
1709                                 switch (cmd->arg1) {
1710                                 case 3:
1711                                         printf(" diverted");
1712                                         break;
1713                                 case 1:
1714                                         printf(" diverted-loopback");
1715                                         break;
1716                                 case 2:
1717                                         printf(" diverted-output");
1718                                         break;
1719                                 default:
1720                                         printf(" diverted-?<%u>", cmd->arg1);
1721                                         break;
1722                                 }
1723                                 break;
1724
1725                         case O_LAYER2:
1726                                 printf(" layer2");
1727                                 break;
1728                         case O_XMIT:
1729                         case O_RECV:
1730                         case O_VIA:
1731                             {
1732                                 char const *s;
1733                                 ipfw_insn_if *cmdif = (ipfw_insn_if *)cmd;
1734
1735                                 if (cmd->opcode == O_XMIT)
1736                                         s = "xmit";
1737                                 else if (cmd->opcode == O_RECV)
1738                                         s = "recv";
1739                                 else /* if (cmd->opcode == O_VIA) */
1740                                         s = "via";
1741                                 if (cmdif->name[0] == '\0')
1742                                         printf(" %s %s", s,
1743                                             inet_ntoa(cmdif->p.ip));
1744                                 else
1745                                         printf(" %s %s", s, cmdif->name);
1746
1747                                 break;
1748                             }
1749                         case O_IPID:
1750                                 if (F_LEN(cmd) == 1)
1751                                     printf(" ipid %u", cmd->arg1 );
1752                                 else
1753                                     print_newports((ipfw_insn_u16 *)cmd, 0,
1754                                         O_IPID);
1755                                 break;
1756
1757                         case O_IPTTL:
1758                                 if (F_LEN(cmd) == 1)
1759                                     printf(" ipttl %u", cmd->arg1 );
1760                                 else
1761                                     print_newports((ipfw_insn_u16 *)cmd, 0,
1762                                         O_IPTTL);
1763                                 break;
1764
1765                         case O_IPVER:
1766                                 printf(" ipver %u", cmd->arg1 );
1767                                 break;
1768
1769                         case O_IPPRECEDENCE:
1770                                 printf(" ipprecedence %u", (cmd->arg1) >> 5 );
1771                                 break;
1772
1773                         case O_IPLEN:
1774                                 if (F_LEN(cmd) == 1)
1775                                     printf(" iplen %u", cmd->arg1 );
1776                                 else
1777                                     print_newports((ipfw_insn_u16 *)cmd, 0,
1778                                         O_IPLEN);
1779                                 break;
1780
1781                         case O_IPOPT:
1782                                 print_flags("ipoptions", cmd, f_ipopts);
1783                                 break;
1784
1785                         case O_IPTOS:
1786                                 print_flags("iptos", cmd, f_iptos);
1787                                 break;
1788
1789                         case O_ICMPTYPE:
1790                                 print_icmptypes((ipfw_insn_u32 *)cmd);
1791                                 break;
1792
1793                         case O_ESTAB:
1794                                 printf(" established");
1795                                 break;
1796
1797                         case O_TCPDATALEN:
1798                                 if (F_LEN(cmd) == 1)
1799                                     printf(" tcpdatalen %u", cmd->arg1 );
1800                                 else
1801                                     print_newports((ipfw_insn_u16 *)cmd, 0,
1802                                         O_TCPDATALEN);
1803                                 break;
1804
1805                         case O_TCPFLAGS:
1806                                 print_flags("tcpflags", cmd, f_tcpflags);
1807                                 break;
1808
1809                         case O_TCPOPTS:
1810                                 print_flags("tcpoptions", cmd, f_tcpopts);
1811                                 break;
1812
1813                         case O_TCPWIN:
1814                                 printf(" tcpwin %d", ntohs(cmd->arg1));
1815                                 break;
1816
1817                         case O_TCPACK:
1818                                 printf(" tcpack %d", ntohl(cmd32->d[0]));
1819                                 break;
1820
1821                         case O_TCPSEQ:
1822                                 printf(" tcpseq %d", ntohl(cmd32->d[0]));
1823                                 break;
1824
1825                         case O_UID:
1826                             {
1827                                 struct passwd *pwd = getpwuid(cmd32->d[0]);
1828
1829                                 if (pwd)
1830                                         printf(" uid %s", pwd->pw_name);
1831                                 else
1832                                         printf(" uid %u", cmd32->d[0]);
1833                             }
1834                                 break;
1835
1836                         case O_GID:
1837                             {
1838                                 struct group *grp = getgrgid(cmd32->d[0]);
1839
1840                                 if (grp)
1841                                         printf(" gid %s", grp->gr_name);
1842                                 else
1843                                         printf(" gid %u", cmd32->d[0]);
1844                             }
1845                                 break;
1846
1847                         case O_JAIL:
1848                                 printf(" jail %d", cmd32->d[0]);
1849                                 break;
1850
1851                         case O_VERREVPATH:
1852                                 printf(" verrevpath");
1853                                 break;
1854
1855                         case O_VERSRCREACH:
1856                                 printf(" versrcreach");
1857                                 break;
1858
1859                         case O_ANTISPOOF:
1860                                 printf(" antispoof");
1861                                 break;
1862
1863                         case O_IPSEC:
1864                                 printf(" ipsec");
1865                                 break;
1866
1867                         case O_NOP:
1868                                 comment = (char *)(cmd + 1);
1869                                 break;
1870
1871                         case O_KEEP_STATE:
1872                                 printf(" keep-state");
1873                                 break;
1874
1875                         case O_LIMIT:
1876                             {
1877                                 struct _s_x *p = limit_masks;
1878                                 ipfw_insn_limit *c = (ipfw_insn_limit *)cmd;
1879                                 uint8_t x = c->limit_mask;
1880                                 char const *comma = " ";
1881
1882                                 printf(" limit");
1883                                 for (; p->x != 0 ; p++)
1884                                         if ((x & p->x) == p->x) {
1885                                                 x &= ~p->x;
1886                                                 printf("%s%s", comma, p->s);
1887                                                 comma = ",";
1888                                         }
1889                                 printf(" %d", c->conn_limit);
1890                             }
1891                                 break;
1892
1893                         case O_IP6:
1894                                 printf(" ip6");
1895                                 break;
1896
1897                         case O_IP4:
1898                                 printf(" ip4");
1899                                 break;
1900
1901                         case O_ICMP6TYPE:
1902                                 print_icmp6types((ipfw_insn_u32 *)cmd);
1903                                 break;
1904
1905                         case O_EXT_HDR:
1906                                 print_ext6hdr( (ipfw_insn *) cmd );
1907                                 break;
1908
1909                         default:
1910                                 printf(" [opcode %d len %d]",
1911                                     cmd->opcode, cmd->len);
1912                         }
1913                 }
1914                 if (cmd->len & F_OR) {
1915                         printf(" or");
1916                         or_block = 1;
1917                 } else if (or_block) {
1918                         printf(" }");
1919                         or_block = 0;
1920                 }
1921         }
1922         show_prerequisites(&flags, HAVE_IP, 0);
1923         if (comment)
1924                 printf(" // %s", comment);
1925         printf("\n");
1926 }
1927
1928 static void
1929 show_dyn_ipfw(ipfw_dyn_rule *d, int pcwidth, int bcwidth)
1930 {
1931         struct protoent *pe;
1932         struct in_addr a;
1933         uint16_t rulenum;
1934
1935         if (!do_expired) {
1936                 if (!d->expire && !(d->dyn_type == O_LIMIT_PARENT))
1937                         return;
1938         }
1939         bcopy(&d->rule, &rulenum, sizeof(rulenum));
1940         printf("%05d", rulenum);
1941         if (pcwidth>0 || bcwidth>0)
1942             printf(" %*llu %*llu (%ds)", pcwidth,
1943                 align_uint64(&d->pcnt), bcwidth,
1944                 align_uint64(&d->bcnt), d->expire);
1945         switch (d->dyn_type) {
1946         case O_LIMIT_PARENT:
1947                 printf(" PARENT %d", d->count);
1948                 break;
1949         case O_LIMIT:
1950                 printf(" LIMIT");
1951                 break;
1952         case O_KEEP_STATE: /* bidir, no mask */
1953                 printf(" STATE");
1954                 break;
1955         }
1956
1957         if ((pe = getprotobynumber(d->id.proto)) != NULL)
1958                 printf(" %s", pe->p_name);
1959         else
1960                 printf(" proto %u", d->id.proto);
1961
1962         a.s_addr = htonl(d->id.src_ip);
1963         printf(" %s %d", inet_ntoa(a), d->id.src_port);
1964
1965         a.s_addr = htonl(d->id.dst_ip);
1966         printf(" <-> %s %d", inet_ntoa(a), d->id.dst_port);
1967         printf("\n");
1968 }
1969
1970 static int
1971 sort_q(const void *pa, const void *pb)
1972 {
1973         int rev = (do_sort < 0);
1974         int field = rev ? -do_sort : do_sort;
1975         long long res = 0;
1976         const struct dn_flow_queue *a = pa;
1977         const struct dn_flow_queue *b = pb;
1978
1979         switch (field) {
1980         case 1: /* pkts */
1981                 res = a->len - b->len;
1982                 break;
1983         case 2: /* bytes */
1984                 res = a->len_bytes - b->len_bytes;
1985                 break;
1986
1987         case 3: /* tot pkts */
1988                 res = a->tot_pkts - b->tot_pkts;
1989                 break;
1990
1991         case 4: /* tot bytes */
1992                 res = a->tot_bytes - b->tot_bytes;
1993                 break;
1994         }
1995         if (res < 0)
1996                 res = -1;
1997         if (res > 0)
1998                 res = 1;
1999         return (int)(rev ? res : -res);
2000 }
2001
2002 static void
2003 list_queues(struct dn_flow_set *fs, struct dn_flow_queue *q)
2004 {
2005         int l;
2006         int index_printed, indexes = 0;
2007         char buff[255];
2008         struct protoent *pe;
2009
2010         if (fs->rq_elements == 0)
2011                 return;
2012
2013         if (do_sort != 0)
2014                 heapsort(q, fs->rq_elements, sizeof *q, sort_q);
2015
2016         /* Print IPv4 flows */
2017         index_printed = 0;
2018         for (l = 0; l < fs->rq_elements; l++) {
2019                 struct in_addr ina;
2020
2021                 /* XXX: Should check for IPv4 flows */
2022                 if (IS_IP6_FLOW_ID(&(q[l].id)))
2023                         continue;
2024
2025                 if (!index_printed) {
2026                         index_printed = 1;
2027                         if (indexes > 0)        /* currently a no-op */
2028                                 printf("\n");
2029                         indexes++;
2030                         printf("    "
2031                             "mask: 0x%02x 0x%08x/0x%04x -> 0x%08x/0x%04x\n",
2032                             fs->flow_mask.proto,
2033                             fs->flow_mask.src_ip, fs->flow_mask.src_port,
2034                             fs->flow_mask.dst_ip, fs->flow_mask.dst_port);
2035
2036                         printf("BKT Prot ___Source IP/port____ "
2037                             "____Dest. IP/port____ "
2038                             "Tot_pkt/bytes Pkt/Byte Drp\n");
2039                 }
2040
2041                 printf("%3d ", q[l].hash_slot);
2042                 pe = getprotobynumber(q[l].id.proto);
2043                 if (pe)
2044                         printf("%-4s ", pe->p_name);
2045                 else
2046                         printf("%4u ", q[l].id.proto);
2047                 ina.s_addr = htonl(q[l].id.src_ip);
2048                 printf("%15s/%-5d ",
2049                     inet_ntoa(ina), q[l].id.src_port);
2050                 ina.s_addr = htonl(q[l].id.dst_ip);
2051                 printf("%15s/%-5d ",
2052                     inet_ntoa(ina), q[l].id.dst_port);
2053                 printf("%4qu %8qu %2u %4u %3u\n",
2054                     q[l].tot_pkts, q[l].tot_bytes,
2055                     q[l].len, q[l].len_bytes, q[l].drops);
2056                 if (verbose)
2057                         printf("   S %20qd  F %20qd\n",
2058                             q[l].S, q[l].F);
2059         }
2060
2061         /* Print IPv6 flows */
2062         index_printed = 0;
2063         for (l = 0; l < fs->rq_elements; l++) {
2064                 if (!IS_IP6_FLOW_ID(&(q[l].id)))
2065                         continue;
2066
2067                 if (!index_printed) {
2068                         index_printed = 1;
2069                         if (indexes > 0)
2070                                 printf("\n");
2071                         indexes++;
2072                         printf("\n        mask: proto: 0x%02x, flow_id: 0x%08x,  ",
2073                             fs->flow_mask.proto, fs->flow_mask.flow_id6);
2074                         inet_ntop(AF_INET6, &(fs->flow_mask.src_ip6),
2075                             buff, sizeof(buff));
2076                         printf("%s/0x%04x -> ", buff, fs->flow_mask.src_port);
2077                         inet_ntop( AF_INET6, &(fs->flow_mask.dst_ip6),
2078                             buff, sizeof(buff) );
2079                         printf("%s/0x%04x\n", buff, fs->flow_mask.dst_port);
2080
2081                         printf("BKT ___Prot___ _flow-id_ "
2082                             "______________Source IPv6/port_______________ "
2083                             "_______________Dest. IPv6/port_______________ "
2084                             "Tot_pkt/bytes Pkt/Byte Drp\n");
2085                 }
2086                 printf("%3d ", q[l].hash_slot);
2087                 pe = getprotobynumber(q[l].id.proto);
2088                 if (pe != NULL)
2089                         printf("%9s ", pe->p_name);
2090                 else
2091                         printf("%9u ", q[l].id.proto);
2092                 printf("%7d  %39s/%-5d ", q[l].id.flow_id6,
2093                     inet_ntop(AF_INET6, &(q[l].id.src_ip6), buff, sizeof(buff)),
2094                     q[l].id.src_port);
2095                 printf(" %39s/%-5d ",
2096                     inet_ntop(AF_INET6, &(q[l].id.dst_ip6), buff, sizeof(buff)),
2097                     q[l].id.dst_port);
2098                 printf(" %4qu %8qu %2u %4u %3u\n",
2099                     q[l].tot_pkts, q[l].tot_bytes,
2100                     q[l].len, q[l].len_bytes, q[l].drops);
2101                 if (verbose)
2102                         printf("   S %20qd  F %20qd\n", q[l].S, q[l].F);
2103         }
2104 }
2105
2106 static void
2107 print_flowset_parms(struct dn_flow_set *fs, char *prefix)
2108 {
2109         int l;
2110         char qs[30];
2111         char plr[30];
2112         char red[90];   /* Display RED parameters */
2113
2114         l = fs->qsize;
2115         if (fs->flags_fs & DN_QSIZE_IS_BYTES) {
2116                 if (l >= 8192)
2117                         sprintf(qs, "%d KB", l / 1024);
2118                 else
2119                         sprintf(qs, "%d B", l);
2120         } else
2121                 sprintf(qs, "%3d sl.", l);
2122         if (fs->plr)
2123                 sprintf(plr, "plr %f", 1.0 * fs->plr / (double)(0x7fffffff));
2124         else
2125                 plr[0] = '\0';
2126         if (fs->flags_fs & DN_IS_RED)   /* RED parameters */
2127                 sprintf(red,
2128                     "\n\t  %cRED w_q %f min_th %d max_th %d max_p %f",
2129                     (fs->flags_fs & DN_IS_GENTLE_RED) ? 'G' : ' ',
2130                     1.0 * fs->w_q / (double)(1 << SCALE_RED),
2131                     SCALE_VAL(fs->min_th),
2132                     SCALE_VAL(fs->max_th),
2133                     1.0 * fs->max_p / (double)(1 << SCALE_RED));
2134         else
2135                 sprintf(red, "droptail");
2136
2137         printf("%s %s%s %d queues (%d buckets) %s\n",
2138             prefix, qs, plr, fs->rq_elements, fs->rq_size, red);
2139 }
2140
2141 static void
2142 list_pipes(void *data, uint nbytes, int ac, char *av[])
2143 {
2144         int rulenum;
2145         void *next = data;
2146         struct dn_pipe *p = (struct dn_pipe *) data;
2147         struct dn_flow_set *fs;
2148         struct dn_flow_queue *q;
2149         int l;
2150
2151         if (ac > 0)
2152                 rulenum = strtoul(*av++, NULL, 10);
2153         else
2154                 rulenum = 0;
2155         for (; nbytes >= sizeof *p; p = (struct dn_pipe *)next) {
2156                 double b = p->bandwidth;
2157                 char buf[30];
2158                 char prefix[80];
2159
2160                 if (p->next.sle_next != (struct dn_pipe *)DN_IS_PIPE)
2161                         break;  /* done with pipes, now queues */
2162
2163                 /*
2164                  * compute length, as pipe have variable size
2165                  */
2166                 l = sizeof(*p) + p->fs.rq_elements * sizeof(*q);
2167                 next = (char *)p + l;
2168                 nbytes -= l;
2169
2170                 if ((rulenum != 0 && rulenum != p->pipe_nr) || do_pipe == 2)
2171                         continue;
2172
2173                 /*
2174                  * Print rate (or clocking interface)
2175                  */
2176                 if (p->if_name[0] != '\0')
2177                         sprintf(buf, "%s", p->if_name);
2178                 else if (b == 0)
2179                         sprintf(buf, "unlimited");
2180                 else if (b >= 1000000)
2181                         sprintf(buf, "%7.3f Mbit/s", b/1000000);
2182                 else if (b >= 1000)
2183                         sprintf(buf, "%7.3f Kbit/s", b/1000);
2184                 else
2185                         sprintf(buf, "%7.3f bit/s ", b);
2186
2187                 sprintf(prefix, "%05d: %s %4d ms ",
2188                     p->pipe_nr, buf, p->delay);
2189                 print_flowset_parms(&(p->fs), prefix);
2190                 if (verbose)
2191                         printf("   V %20qd\n", p->V >> MY_M);
2192
2193                 q = (struct dn_flow_queue *)(p+1);
2194                 list_queues(&(p->fs), q);
2195         }
2196         for (fs = next; nbytes >= sizeof *fs; fs = next) {
2197                 char prefix[80];
2198
2199                 if (fs->next.sle_next != (struct dn_flow_set *)DN_IS_QUEUE)
2200                         break;
2201                 l = sizeof(*fs) + fs->rq_elements * sizeof(*q);
2202                 next = (char *)fs + l;
2203                 nbytes -= l;
2204
2205                 if (rulenum != 0 && ((rulenum != fs->fs_nr && do_pipe == 2) ||
2206                     (rulenum != fs->parent_nr && do_pipe == 1))) {
2207                         continue;
2208                 }
2209
2210                 q = (struct dn_flow_queue *)(fs+1);
2211                 sprintf(prefix, "q%05d: weight %d pipe %d ",
2212                     fs->fs_nr, fs->weight, fs->parent_nr);
2213                 print_flowset_parms(fs, prefix);
2214                 list_queues(fs, q);
2215         }
2216 }
2217
2218 /*
2219  * This one handles all set-related commands
2220  *      ipfw set { show | enable | disable }
2221  *      ipfw set swap X Y
2222  *      ipfw set move X to Y
2223  *      ipfw set move rule X to Y
2224  */
2225 static void
2226 sets_handler(int ac, char *av[])
2227 {
2228         uint32_t set_disable, masks[2];
2229         int i, nbytes;
2230         uint16_t rulenum;
2231         uint8_t cmd, new_set;
2232
2233         ac--;
2234         av++;
2235
2236         if (!ac)
2237                 errx(EX_USAGE, "set needs command");
2238         if (_substrcmp(*av, "show") == 0) {
2239                 void *data;
2240                 char const *msg;
2241
2242                 nbytes = sizeof(struct ip_fw);
2243                 if ((data = calloc(1, nbytes)) == NULL)
2244                         err(EX_OSERR, "calloc");
2245                 if (do_cmd(IP_FW_GET, data, (uintptr_t)&nbytes) < 0)
2246                         err(EX_OSERR, "getsockopt(IP_FW_GET)");
2247                 bcopy(&((struct ip_fw *)data)->next_rule,
2248                         &set_disable, sizeof(set_disable));
2249
2250                 for (i = 0, msg = "disable" ; i < RESVD_SET; i++)
2251                         if ((set_disable & (1<<i))) {
2252                                 printf("%s %d", msg, i);
2253                                 msg = "";
2254                         }
2255                 msg = (set_disable) ? " enable" : "enable";
2256                 for (i = 0; i < RESVD_SET; i++)
2257                         if (!(set_disable & (1<<i))) {
2258                                 printf("%s %d", msg, i);
2259                                 msg = "";
2260                         }
2261                 printf("\n");
2262         } else if (_substrcmp(*av, "swap") == 0) {
2263                 ac--; av++;
2264                 if (ac != 2)
2265                         errx(EX_USAGE, "set swap needs 2 set numbers\n");
2266                 rulenum = atoi(av[0]);
2267                 new_set = atoi(av[1]);
2268                 if (!isdigit(*(av[0])) || rulenum > RESVD_SET)
2269                         errx(EX_DATAERR, "invalid set number %s\n", av[0]);
2270                 if (!isdigit(*(av[1])) || new_set > RESVD_SET)
2271                         errx(EX_DATAERR, "invalid set number %s\n", av[1]);
2272                 masks[0] = (4 << 24) | (new_set << 16) | (rulenum);
2273                 i = do_cmd(IP_FW_DEL, masks, sizeof(uint32_t));
2274         } else if (_substrcmp(*av, "move") == 0) {
2275                 ac--; av++;
2276                 if (ac && _substrcmp(*av, "rule") == 0) {
2277                         cmd = 2;
2278                         ac--; av++;
2279                 } else
2280                         cmd = 3;
2281                 if (ac != 3 || _substrcmp(av[1], "to") != 0)
2282                         errx(EX_USAGE, "syntax: set move [rule] X to Y\n");
2283                 rulenum = atoi(av[0]);
2284                 new_set = atoi(av[2]);
2285                 if (!isdigit(*(av[0])) || (cmd == 3 && rulenum > RESVD_SET) ||
2286                         (cmd == 2 && rulenum == 65535) )
2287                         errx(EX_DATAERR, "invalid source number %s\n", av[0]);
2288                 if (!isdigit(*(av[2])) || new_set > RESVD_SET)
2289                         errx(EX_DATAERR, "invalid dest. set %s\n", av[1]);
2290                 masks[0] = (cmd << 24) | (new_set << 16) | (rulenum);
2291                 i = do_cmd(IP_FW_DEL, masks, sizeof(uint32_t));
2292         } else if (_substrcmp(*av, "disable") == 0 ||
2293                    _substrcmp(*av, "enable") == 0 ) {
2294                 int which = _substrcmp(*av, "enable") == 0 ? 1 : 0;
2295
2296                 ac--; av++;
2297                 masks[0] = masks[1] = 0;
2298
2299                 while (ac) {
2300                         if (isdigit(**av)) {
2301                                 i = atoi(*av);
2302                                 if (i < 0 || i > RESVD_SET)
2303                                         errx(EX_DATAERR,
2304                                             "invalid set number %d\n", i);
2305                                 masks[which] |= (1<<i);
2306                         } else if (_substrcmp(*av, "disable") == 0)
2307                                 which = 0;
2308                         else if (_substrcmp(*av, "enable") == 0)
2309                                 which = 1;
2310                         else
2311                                 errx(EX_DATAERR,
2312                                         "invalid set command %s\n", *av);
2313                         av++; ac--;
2314                 }
2315                 if ( (masks[0] & masks[1]) != 0 )
2316                         errx(EX_DATAERR,
2317                             "cannot enable and disable the same set\n");
2318
2319                 i = do_cmd(IP_FW_DEL, masks, sizeof(masks));
2320                 if (i)
2321                         warn("set enable/disable: setsockopt(IP_FW_DEL)");
2322         } else
2323                 errx(EX_USAGE, "invalid set command %s\n", *av);
2324 }
2325
2326 static void
2327 sysctl_handler(int ac, char *av[], int which)
2328 {
2329         ac--;
2330         av++;
2331
2332         if (ac == 0) {
2333                 warnx("missing keyword to enable/disable\n");
2334         } else if (_substrcmp(*av, "firewall") == 0) {
2335                 sysctlbyname("net.inet.ip.fw.enable", NULL, 0,
2336                     &which, sizeof(which));
2337         } else if (_substrcmp(*av, "one_pass") == 0) {
2338                 sysctlbyname("net.inet.ip.fw.one_pass", NULL, 0,
2339                     &which, sizeof(which));
2340         } else if (_substrcmp(*av, "debug") == 0) {
2341                 sysctlbyname("net.inet.ip.fw.debug", NULL, 0,
2342                     &which, sizeof(which));
2343         } else if (_substrcmp(*av, "verbose") == 0) {
2344                 sysctlbyname("net.inet.ip.fw.verbose", NULL, 0,
2345                     &which, sizeof(which));
2346         } else if (_substrcmp(*av, "dyn_keepalive") == 0) {
2347                 sysctlbyname("net.inet.ip.fw.dyn_keepalive", NULL, 0,
2348                     &which, sizeof(which));
2349         } else if (_substrcmp(*av, "altq") == 0) {
2350                 altq_set_enabled(which);
2351         } else {
2352                 warnx("unrecognize enable/disable keyword: %s\n", *av);
2353         }
2354 }
2355
2356 static void
2357 list(int ac, char *av[], int show_counters)
2358 {
2359         struct ip_fw *r;
2360         ipfw_dyn_rule *dynrules, *d;
2361
2362 #define NEXT(r) ((struct ip_fw *)((char *)r + RULESIZE(r)))
2363         char *lim;
2364         void *data = NULL;
2365         int bcwidth, n, nbytes, nstat, ndyn, pcwidth, width;
2366         int exitval = EX_OK;
2367         int lac;
2368         char **lav;
2369         u_long rnum, last;
2370         char *endptr;
2371         int seen = 0;
2372
2373         const int ocmd = do_pipe ? IP_DUMMYNET_GET : IP_FW_GET;
2374         int nalloc = 1024;      /* start somewhere... */
2375
2376         last = 0;
2377
2378         if (test_only) {
2379                 fprintf(stderr, "Testing only, list disabled\n");
2380                 return;
2381         }
2382
2383         ac--;
2384         av++;
2385
2386         /* get rules or pipes from kernel, resizing array as necessary */
2387         nbytes = nalloc;
2388
2389         while (nbytes >= nalloc) {
2390                 nalloc = nalloc * 2 + 200;
2391                 nbytes = nalloc;
2392                 if ((data = realloc(data, nbytes)) == NULL)
2393                         err(EX_OSERR, "realloc");
2394                 if (do_cmd(ocmd, data, (uintptr_t)&nbytes) < 0)
2395                         err(EX_OSERR, "getsockopt(IP_%s_GET)",
2396                                 do_pipe ? "DUMMYNET" : "FW");
2397         }
2398
2399         if (do_pipe) {
2400                 list_pipes(data, nbytes, ac, av);
2401                 goto done;
2402         }
2403
2404         /*
2405          * Count static rules. They have variable size so we
2406          * need to scan the list to count them.
2407          */
2408         for (nstat = 1, r = data, lim = (char *)data + nbytes;
2409                     r->rulenum < 65535 && (char *)r < lim;
2410                     ++nstat, r = NEXT(r) )
2411                 ; /* nothing */
2412
2413         /*
2414          * Count dynamic rules. This is easier as they have
2415          * fixed size.
2416          */
2417         r = NEXT(r);
2418         dynrules = (ipfw_dyn_rule *)r ;
2419         n = (char *)r - (char *)data;
2420         ndyn = (nbytes - n) / sizeof *dynrules;
2421
2422         /* if showing stats, figure out column widths ahead of time */
2423         bcwidth = pcwidth = 0;
2424         if (show_counters) {
2425                 for (n = 0, r = data; n < nstat; n++, r = NEXT(r)) {
2426                         /* packet counter */
2427                         width = snprintf(NULL, 0, "%llu",
2428                             align_uint64(&r->pcnt));
2429                         if (width > pcwidth)
2430                                 pcwidth = width;
2431
2432                         /* byte counter */
2433                         width = snprintf(NULL, 0, "%llu",
2434                             align_uint64(&r->bcnt));
2435                         if (width > bcwidth)
2436                                 bcwidth = width;
2437                 }
2438         }
2439         if (do_dynamic && ndyn) {
2440                 for (n = 0, d = dynrules; n < ndyn; n++, d++) {
2441                         width = snprintf(NULL, 0, "%llu",
2442                             align_uint64(&d->pcnt));
2443                         if (width > pcwidth)
2444                                 pcwidth = width;
2445
2446                         width = snprintf(NULL, 0, "%llu",
2447                             align_uint64(&d->bcnt));
2448                         if (width > bcwidth)
2449                                 bcwidth = width;
2450                 }
2451         }
2452         /* if no rule numbers were specified, list all rules */
2453         if (ac == 0) {
2454                 for (n = 0, r = data; n < nstat; n++, r = NEXT(r) )
2455                         show_ipfw(r, pcwidth, bcwidth);
2456
2457                 if (do_dynamic && ndyn) {
2458                         printf("## Dynamic rules (%d):\n", ndyn);
2459                         for (n = 0, d = dynrules; n < ndyn; n++, d++)
2460                                 show_dyn_ipfw(d, pcwidth, bcwidth);
2461                 }
2462                 goto done;
2463         }
2464
2465         /* display specific rules requested on command line */
2466
2467         for (lac = ac, lav = av; lac != 0; lac--) {
2468                 /* convert command line rule # */
2469                 last = rnum = strtoul(*lav++, &endptr, 10);
2470                 if (*endptr == '-')
2471                         last = strtoul(endptr+1, &endptr, 10);
2472                 if (*endptr) {
2473                         exitval = EX_USAGE;
2474                         warnx("invalid rule number: %s", *(lav - 1));
2475                         continue;
2476                 }
2477                 for (n = seen = 0, r = data; n < nstat; n++, r = NEXT(r) ) {
2478                         if (r->rulenum > last)
2479                                 break;
2480                         if (r->rulenum >= rnum && r->rulenum <= last) {
2481                                 show_ipfw(r, pcwidth, bcwidth);
2482                                 seen = 1;
2483                         }
2484                 }
2485                 if (!seen) {
2486                         /* give precedence to other error(s) */
2487                         if (exitval == EX_OK)
2488                                 exitval = EX_UNAVAILABLE;
2489                         warnx("rule %lu does not exist", rnum);
2490                 }
2491         }
2492
2493         if (do_dynamic && ndyn) {
2494                 printf("## Dynamic rules:\n");
2495                 for (lac = ac, lav = av; lac != 0; lac--) {
2496                         last = rnum = strtoul(*lav++, &endptr, 10);
2497                         if (*endptr == '-')
2498                                 last = strtoul(endptr+1, &endptr, 10);
2499                         if (*endptr)
2500                                 /* already warned */
2501                                 continue;
2502                         for (n = 0, d = dynrules; n < ndyn; n++, d++) {
2503                                 uint16_t rulenum;
2504
2505                                 bcopy(&d->rule, &rulenum, sizeof(rulenum));
2506                                 if (rulenum > rnum)
2507                                         break;
2508                                 if (r->rulenum >= rnum && r->rulenum <= last)
2509                                         show_dyn_ipfw(d, pcwidth, bcwidth);
2510                         }
2511                 }
2512         }
2513
2514         ac = 0;
2515
2516 done:
2517         free(data);
2518
2519         if (exitval != EX_OK)
2520                 exit(exitval);
2521 #undef NEXT
2522 }
2523
2524 static void
2525 show_usage(void)
2526 {
2527         fprintf(stderr, "usage: ipfw [options]\n"
2528 "do \"ipfw -h\" or see ipfw manpage for details\n"
2529 );
2530         exit(EX_USAGE);
2531 }
2532
2533 static void
2534 help(void)
2535 {
2536         fprintf(stderr,
2537 "ipfw syntax summary (but please do read the ipfw(8) manpage):\n"
2538 "ipfw [-abcdefhnNqStTv] <command> where <command> is one of:\n"
2539 "add [num] [set N] [prob x] RULE-BODY\n"
2540 "{pipe|queue} N config PIPE-BODY\n"
2541 "[pipe|queue] {zero|delete|show} [N{,N}]\n"
2542 "set [disable N... enable N...] | move [rule] X to Y | swap X Y | show\n"
2543 "table N {add ip[/bits] [value] | delete ip[/bits] | flush | list}\n"
2544 "\n"
2545 "RULE-BODY:     check-state [PARAMS] | ACTION [PARAMS] ADDR [OPTION_LIST]\n"
2546 "ACTION:        check-state | allow | count | deny | unreach{,6} CODE |\n"
2547 "               skipto N | {divert|tee} PORT | forward ADDR |\n"
2548 "               pipe N | queue N\n"
2549 "PARAMS:        [log [logamount LOGLIMIT]] [altq QUEUE_NAME]\n"
2550 "ADDR:          [ MAC dst src ether_type ] \n"
2551 "               [ ip from IPADDR [ PORT ] to IPADDR [ PORTLIST ] ]\n"
2552 "               [ ipv6|ip6 from IP6ADDR [ PORT ] to IP6ADDR [ PORTLIST ] ]\n"
2553 "IPADDR:        [not] { any | me | ip/bits{x,y,z} | table(t[,v]) | IPLIST }\n"
2554 "IP6ADDR:       [not] { any | me | me6 | ip6/bits | IP6LIST }\n"
2555 "IP6LIST:       { ip6 | ip6/bits }[,IP6LIST]\n"
2556 "IPLIST:        { ip | ip/bits | ip:mask }[,IPLIST]\n"
2557 "OPTION_LIST:   OPTION [OPTION_LIST]\n"
2558 "OPTION:        bridged | diverted | diverted-loopback | diverted-output |\n"
2559 "       {dst-ip|src-ip} IPADDR | {dst-ip6|src-ip6|dst-ipv6|src-ipv6} IP6ADDR |\n"
2560 "       {dst-port|src-port} LIST |\n"
2561 "       estab | frag | {gid|uid} N | icmptypes LIST | in | out | ipid LIST |\n"
2562 "       iplen LIST | ipoptions SPEC | ipprecedence | ipsec | iptos SPEC |\n"
2563 "       ipttl LIST | ipversion VER | keep-state | layer2 | limit ... |\n"
2564 "       icmp6types LIST | ext6hdr LIST | flow-id N[,N] |\n"
2565 "       mac ... | mac-type LIST | proto LIST | {recv|xmit|via} {IF|IPADDR} |\n"
2566 "       setup | {tcpack|tcpseq|tcpwin} NN | tcpflags SPEC | tcpoptions SPEC |\n"
2567 "       tcpdatalen LIST | verrevpath | versrcreach | antispoof\n"
2568 );
2569 exit(0);
2570 }
2571
2572
2573 static int
2574 lookup_host (char *host, struct in_addr *ipaddr)
2575 {
2576         struct hostent *he;
2577
2578         if (!inet_aton(host, ipaddr)) {
2579                 if ((he = gethostbyname(host)) == NULL)
2580                         return(-1);
2581                 *ipaddr = *(struct in_addr *)he->h_addr_list[0];
2582         }
2583         return(0);
2584 }
2585
2586 /*
2587  * fills the addr and mask fields in the instruction as appropriate from av.
2588  * Update length as appropriate.
2589  * The following formats are allowed:
2590  *      me      returns O_IP_*_ME
2591  *      1.2.3.4         single IP address
2592  *      1.2.3.4:5.6.7.8 address:mask
2593  *      1.2.3.4/24      address/mask
2594  *      1.2.3.4/26{1,6,5,4,23}  set of addresses in a subnet
2595  * We can have multiple comma-separated address/mask entries.
2596  */
2597 static void
2598 fill_ip(ipfw_insn_ip *cmd, char *av)
2599 {
2600         int len = 0;
2601         uint32_t *d = ((ipfw_insn_u32 *)cmd)->d;
2602
2603         cmd->o.len &= ~F_LEN_MASK;      /* zero len */
2604
2605         if (_substrcmp(av, "any") == 0)
2606                 return;
2607
2608         if (_substrcmp(av, "me") == 0) {
2609                 cmd->o.len |= F_INSN_SIZE(ipfw_insn);
2610                 return;
2611         }
2612
2613         if (strncmp(av, "table(", 6) == 0) {
2614                 char *p = strchr(av + 6, ',');
2615
2616                 if (p)
2617                         *p++ = '\0';
2618                 cmd->o.opcode = O_IP_DST_LOOKUP;
2619                 cmd->o.arg1 = strtoul(av + 6, NULL, 0);
2620                 if (p) {
2621                         cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32);
2622                         d[0] = strtoul(p, NULL, 0);
2623                 } else
2624                         cmd->o.len |= F_INSN_SIZE(ipfw_insn);
2625                 return;
2626         }
2627
2628     while (av) {
2629         /*
2630          * After the address we can have '/' or ':' indicating a mask,
2631          * ',' indicating another address follows, '{' indicating a
2632          * set of addresses of unspecified size.
2633          */
2634         char *p = strpbrk(av, "/:,{");
2635         int masklen;
2636         char md;
2637
2638         if (p) {
2639                 md = *p;
2640                 *p++ = '\0';
2641         } else
2642                 md = '\0';
2643
2644         if (lookup_host(av, (struct in_addr *)&d[0]) != 0)
2645                 errx(EX_NOHOST, "hostname ``%s'' unknown", av);
2646         switch (md) {
2647         case ':':
2648                 if (!inet_aton(p, (struct in_addr *)&d[1]))
2649                         errx(EX_DATAERR, "bad netmask ``%s''", p);
2650                 break;
2651         case '/':
2652                 masklen = atoi(p);
2653                 if (masklen == 0)
2654                         d[1] = htonl(0);        /* mask */
2655                 else if (masklen > 32)
2656                         errx(EX_DATAERR, "bad width ``%s''", p);
2657                 else
2658                         d[1] = htonl(~0 << (32 - masklen));
2659                 break;
2660         case '{':       /* no mask, assume /24 and put back the '{' */
2661                 d[1] = htonl(~0 << (32 - 24));
2662                 *(--p) = md;
2663                 break;
2664
2665         case ',':       /* single address plus continuation */
2666                 *(--p) = md;
2667                 /* FALLTHROUGH */
2668         case 0:         /* initialization value */
2669         default:
2670                 d[1] = htonl(~0);       /* force /32 */
2671                 break;
2672         }
2673         d[0] &= d[1];           /* mask base address with mask */
2674         /* find next separator */
2675         if (p)
2676                 p = strpbrk(p, ",{");
2677         if (p && *p == '{') {
2678                 /*
2679                  * We have a set of addresses. They are stored as follows:
2680                  *   arg1       is the set size (powers of 2, 2..256)
2681                  *   addr       is the base address IN HOST FORMAT
2682                  *   mask..     is an array of arg1 bits (rounded up to
2683                  *              the next multiple of 32) with bits set
2684                  *              for each host in the map.
2685                  */
2686                 uint32_t *map = (uint32_t *)&cmd->mask;
2687                 int low, high;
2688                 int i = contigmask((uint8_t *)&(d[1]), 32);
2689
2690                 if (len > 0)
2691                         errx(EX_DATAERR, "address set cannot be in a list");
2692                 if (i < 24 || i > 31)
2693                         errx(EX_DATAERR, "invalid set with mask %d\n", i);
2694                 cmd->o.arg1 = 1<<(32-i);        /* map length           */
2695                 d[0] = ntohl(d[0]);             /* base addr in host format */
2696                 cmd->o.opcode = O_IP_DST_SET;   /* default */
2697                 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32) + (cmd->o.arg1+31)/32;
2698                 for (i = 0; i < (cmd->o.arg1+31)/32 ; i++)
2699                         map[i] = 0;     /* clear map */
2700
2701                 av = p + 1;
2702                 low = d[0] & 0xff;
2703                 high = low + cmd->o.arg1 - 1;
2704                 /*
2705                  * Here, i stores the previous value when we specify a range
2706                  * of addresses within a mask, e.g. 45-63. i = -1 means we
2707                  * have no previous value.
2708                  */
2709                 i = -1; /* previous value in a range */
2710                 while (isdigit(*av)) {
2711                         char *s;
2712                         int a = strtol(av, &s, 0);
2713
2714                         if (s == av) { /* no parameter */
2715                             if (*av != '}')
2716                                 errx(EX_DATAERR, "set not closed\n");
2717                             if (i != -1)
2718                                 errx(EX_DATAERR, "incomplete range %d-", i);
2719                             break;
2720                         }
2721                         if (a < low || a > high)
2722                             errx(EX_DATAERR, "addr %d out of range [%d-%d]\n",
2723                                 a, low, high);
2724                         a -= low;
2725                         if (i == -1)    /* no previous in range */
2726                             i = a;
2727                         else {          /* check that range is valid */
2728                             if (i > a)
2729                                 errx(EX_DATAERR, "invalid range %d-%d",
2730                                         i+low, a+low);
2731                             if (*s == '-')
2732                                 errx(EX_DATAERR, "double '-' in range");
2733                         }
2734                         for (; i <= a; i++)
2735                             map[i/32] |= 1<<(i & 31);
2736                         i = -1;
2737                         if (*s == '-')
2738                             i = a;
2739                         else if (*s == '}')
2740                             break;
2741                         av = s+1;
2742                 }
2743                 return;
2744         }
2745         av = p;
2746         if (av)                 /* then *av must be a ',' */
2747                 av++;
2748
2749         /* Check this entry */
2750         if (d[1] == 0) { /* "any", specified as x.x.x.x/0 */
2751                 /*
2752                  * 'any' turns the entire list into a NOP.
2753                  * 'not any' never matches, so it is removed from the
2754                  * list unless it is the only item, in which case we
2755                  * report an error.
2756                  */
2757                 if (cmd->o.len & F_NOT) {       /* "not any" never matches */
2758                         if (av == NULL && len == 0) /* only this entry */
2759                                 errx(EX_DATAERR, "not any never matches");
2760                 }
2761                 /* else do nothing and skip this entry */
2762                 return;
2763         }
2764         /* A single IP can be stored in an optimized format */
2765         if (d[1] == IP_MASK_ALL && av == NULL && len == 0) {
2766                 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32);
2767                 return;
2768         }
2769         len += 2;       /* two words... */
2770         d += 2;
2771     } /* end while */
2772     cmd->o.len |= len+1;
2773 }
2774
2775
2776 /* Try to find ipv6 address by hostname */
2777 static int
2778 lookup_host6 (char *host, struct in6_addr *ip6addr)
2779 {
2780         struct hostent *he;
2781
2782         if (!inet_pton(AF_INET6, host, ip6addr)) {
2783                 if ((he = gethostbyname2(host, AF_INET6)) == NULL)
2784                         return(-1);
2785                 memcpy(ip6addr, he->h_addr_list[0], sizeof( struct in6_addr));
2786         }
2787         return(0);
2788 }
2789
2790
2791 /* n2mask sets n bits of the mask */
2792 static void
2793 n2mask(struct in6_addr *mask, int n)
2794 {
2795         static int      minimask[9] =
2796             { 0x00, 0x80, 0xc0, 0xe0, 0xf0, 0xf8, 0xfc, 0xfe, 0xff };
2797         u_char          *p;
2798
2799         memset(mask, 0, sizeof(struct in6_addr));
2800         p = (u_char *) mask;
2801         for (; n > 0; p++, n -= 8) {
2802                 if (n >= 8)
2803                         *p = 0xff;
2804                 else
2805                         *p = minimask[n];
2806         }
2807         return;
2808 }
2809
2810
2811 /*
2812  * fill the addr and mask fields in the instruction as appropriate from av.
2813  * Update length as appropriate.
2814  * The following formats are allowed:
2815  *     any     matches any IP6. Actually returns an empty instruction.
2816  *     me      returns O_IP6_*_ME
2817  *
2818  *     03f1::234:123:0342                single IP6 addres
2819  *     03f1::234:123:0342/24            address/mask
2820  *     03f1::234:123:0342/24,03f1::234:123:0343/               List of address
2821  *
2822  * Set of address (as in ipv6) not supported because ipv6 address
2823  * are typically random past the initial prefix.
2824  * Return 1 on success, 0 on failure.
2825  */
2826 static int
2827 fill_ip6(ipfw_insn_ip6 *cmd, char *av)
2828 {
2829         int len = 0;
2830         struct in6_addr *d = &(cmd->addr6);
2831         /*
2832          * Needed for multiple address.
2833          * Note d[1] points to struct in6_add r mask6 of cmd
2834          */
2835
2836        cmd->o.len &= ~F_LEN_MASK;       /* zero len */
2837
2838        if (strcmp(av, "any") == 0)
2839                return (1);
2840
2841
2842        if (strcmp(av, "me") == 0) {     /* Set the data for "me" opt*/
2843                cmd->o.len |= F_INSN_SIZE(ipfw_insn);
2844                return (1);
2845        }
2846
2847        if (strcmp(av, "me6") == 0) {    /* Set the data for "me" opt*/
2848                cmd->o.len |= F_INSN_SIZE(ipfw_insn);
2849                return (1);
2850        }
2851
2852        av = strdup(av);
2853        while (av) {
2854                 /*
2855                  * After the address we can have '/' indicating a mask,
2856                  * or ',' indicating another address follows.
2857                  */
2858
2859                 char *p;
2860                 int masklen;
2861                 char md = '\0';
2862
2863                 if ((p = strpbrk(av, "/,")) ) {
2864                         md = *p;        /* save the separator */
2865                         *p = '\0';      /* terminate address string */
2866                         p++;            /* and skip past it */
2867                 }
2868                 /* now p points to NULL, mask or next entry */
2869
2870                 /* lookup stores address in *d as a side effect */
2871                 if (lookup_host6(av, d) != 0) {
2872                         /* XXX: failed. Free memory and go */
2873                         errx(EX_DATAERR, "bad address \"%s\"", av);
2874                 }
2875                 /* next, look at the mask, if any */
2876                 masklen = (md == '/') ? atoi(p) : 128;
2877                 if (masklen > 128 || masklen < 0)
2878                         errx(EX_DATAERR, "bad width \"%s\''", p);
2879                 else
2880                         n2mask(&d[1], masklen);
2881
2882                 APPLY_MASK(d, &d[1])   /* mask base address with mask */
2883
2884                 /* find next separator */
2885
2886                 if (md == '/') {        /* find separator past the mask */
2887                         p = strpbrk(p, ",");
2888                         if (p != NULL)
2889                                 p++;
2890                 }
2891                 av = p;
2892
2893                 /* Check this entry */
2894                 if (masklen == 0) {
2895                         /*
2896                          * 'any' turns the entire list into a NOP.
2897                          * 'not any' never matches, so it is removed from the
2898                          * list unless it is the only item, in which case we
2899                          * report an error.
2900                          */
2901                         if (cmd->o.len & F_NOT && av == NULL && len == 0)
2902                                 errx(EX_DATAERR, "not any never matches");
2903                         continue;
2904                 }
2905
2906                 /*
2907                  * A single IP can be stored alone
2908                  */
2909                 if (masklen == 128 && av == NULL && len == 0) {
2910                         len = F_INSN_SIZE(struct in6_addr);
2911                         break;
2912                 }
2913
2914                 /* Update length and pointer to arguments */
2915                 len += F_INSN_SIZE(struct in6_addr)*2;
2916                 d += 2;
2917         } /* end while */
2918
2919         /*
2920          * Total length of the command, remember that 1 is the size of
2921          * the base command.
2922          */
2923         cmd->o.len |= len+1;
2924         free(av);
2925         return (1);
2926 }
2927
2928 /*
2929  * fills command for ipv6 flow-id filtering
2930  * note that the 20 bit flow number is stored in a array of u_int32_t
2931  * it's supported lists of flow-id, so in the o.arg1 we store how many
2932  * additional flow-id we want to filter, the basic is 1
2933  */
2934 void
2935 fill_flow6( ipfw_insn_u32 *cmd, char *av )
2936 {
2937         u_int32_t type;  /* Current flow number */
2938         u_int16_t nflow = 0;    /* Current flow index */
2939         char *s = av;
2940         cmd->d[0] = 0;    /* Initializing the base number*/
2941
2942         while (s) {
2943                 av = strsep( &s, ",") ;
2944                 type = strtoul(av, &av, 0);
2945                 if (*av != ',' && *av != '\0')
2946                         errx(EX_DATAERR, "invalid ipv6 flow number %s", av);
2947                 if (type > 0xfffff)
2948                         errx(EX_DATAERR, "flow number out of range %s", av);
2949                 cmd->d[nflow] |= type;
2950                 nflow++;
2951         }
2952         if( nflow > 0 ) {
2953                 cmd->o.opcode = O_FLOW6ID;
2954                 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32) + nflow;
2955                 cmd->o.arg1 = nflow;
2956         }
2957         else {
2958                 errx(EX_DATAERR, "invalid ipv6 flow number %s", av);
2959         }
2960 }
2961
2962 static ipfw_insn *
2963 add_srcip6(ipfw_insn *cmd, char *av)
2964 {
2965
2966         fill_ip6((ipfw_insn_ip6 *)cmd, av);
2967         if (F_LEN(cmd) == 0)                            /* any */
2968                 ;
2969         if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn)) {     /* "me" */
2970                 cmd->opcode = O_IP6_SRC_ME;
2971         } else if (F_LEN(cmd) ==
2972             (F_INSN_SIZE(struct in6_addr) + F_INSN_SIZE(ipfw_insn))) {
2973                 /* single IP, no mask*/
2974                 cmd->opcode = O_IP6_SRC;
2975         } else {                                        /* addr/mask opt */
2976                 cmd->opcode = O_IP6_SRC_MASK;
2977         }
2978         return cmd;
2979 }
2980
2981 static ipfw_insn *
2982 add_dstip6(ipfw_insn *cmd, char *av)
2983 {
2984
2985         fill_ip6((ipfw_insn_ip6 *)cmd, av);
2986         if (F_LEN(cmd) == 0)                            /* any */
2987                 ;
2988         if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn)) {     /* "me" */
2989                 cmd->opcode = O_IP6_DST_ME;
2990         } else if (F_LEN(cmd) ==
2991             (F_INSN_SIZE(struct in6_addr) + F_INSN_SIZE(ipfw_insn))) {
2992                 /* single IP, no mask*/
2993                 cmd->opcode = O_IP6_DST;
2994         } else {                                        /* addr/mask opt */
2995                 cmd->opcode = O_IP6_DST_MASK;
2996         }
2997         return cmd;
2998 }
2999
3000
3001 /*
3002  * helper function to process a set of flags and set bits in the
3003  * appropriate masks.
3004  */
3005 static void
3006 fill_flags(ipfw_insn *cmd, enum ipfw_opcodes opcode,
3007         struct _s_x *flags, char *p)
3008 {
3009         uint8_t set=0, clear=0;
3010
3011         while (p && *p) {
3012                 char *q;        /* points to the separator */
3013                 int val;
3014                 uint8_t *which; /* mask we are working on */
3015
3016                 if (*p == '!') {
3017                         p++;
3018                         which = &clear;
3019                 } else
3020                         which = &set;
3021                 q = strchr(p, ',');
3022                 if (q)
3023                         *q++ = '\0';
3024                 val = match_token(flags, p);
3025                 if (val <= 0)
3026                         errx(EX_DATAERR, "invalid flag %s", p);
3027                 *which |= (uint8_t)val;
3028                 p = q;
3029         }
3030         cmd->opcode = opcode;
3031         cmd->len =  (cmd->len & (F_NOT | F_OR)) | 1;
3032         cmd->arg1 = (set & 0xff) | ( (clear & 0xff) << 8);
3033 }
3034
3035
3036 static void
3037 delete(int ac, char *av[])
3038 {
3039         uint32_t rulenum;
3040         struct dn_pipe p;
3041         int i;
3042         int exitval = EX_OK;
3043         int do_set = 0;
3044
3045         memset(&p, 0, sizeof p);
3046
3047         av++; ac--;
3048         NEED1("missing rule specification");
3049         if (ac > 0 && _substrcmp(*av, "set") == 0) {
3050                 do_set = 1;     /* delete set */
3051                 ac--; av++;
3052         }
3053
3054         /* Rule number */
3055         while (ac && isdigit(**av)) {
3056                 i = atoi(*av); av++; ac--;
3057                 if (do_pipe) {
3058                         if (do_pipe == 1)
3059                                 p.pipe_nr = i;
3060                         else
3061                                 p.fs.fs_nr = i;
3062                         i = do_cmd(IP_DUMMYNET_DEL, &p, sizeof p);
3063                         if (i) {
3064                                 exitval = 1;
3065                                 warn("rule %u: setsockopt(IP_DUMMYNET_DEL)",
3066                                     do_pipe == 1 ? p.pipe_nr : p.fs.fs_nr);
3067                         }
3068                 } else {
3069                         rulenum =  (i & 0xffff) | (do_set << 24);
3070                         i = do_cmd(IP_FW_DEL, &rulenum, sizeof rulenum);
3071                         if (i) {
3072                                 exitval = EX_UNAVAILABLE;
3073                                 warn("rule %u: setsockopt(IP_FW_DEL)",
3074                                     rulenum);
3075                         }
3076                 }
3077         }
3078         if (exitval != EX_OK)
3079                 exit(exitval);
3080 }
3081
3082
3083 /*
3084  * fill the interface structure. We do not check the name as we can
3085  * create interfaces dynamically, so checking them at insert time
3086  * makes relatively little sense.
3087  * Interface names containing '*', '?', or '[' are assumed to be shell
3088  * patterns which match interfaces.
3089  */
3090 static void
3091 fill_iface(ipfw_insn_if *cmd, char *arg)
3092 {
3093         cmd->name[0] = '\0';
3094         cmd->o.len |= F_INSN_SIZE(ipfw_insn_if);
3095
3096         /* Parse the interface or address */
3097         if (strcmp(arg, "any") == 0)
3098                 cmd->o.len = 0;         /* effectively ignore this command */
3099         else if (!isdigit(*arg)) {
3100                 strlcpy(cmd->name, arg, sizeof(cmd->name));
3101                 cmd->p.glob = strpbrk(arg, "*?[") != NULL ? 1 : 0;
3102         } else if (!inet_aton(arg, &cmd->p.ip))
3103                 errx(EX_DATAERR, "bad ip address ``%s''", arg);
3104 }
3105
3106 static void
3107 config_pipe(int ac, char **av)
3108 {
3109         struct dn_pipe p;
3110         int i;
3111         char *end;
3112         void *par = NULL;
3113
3114         memset(&p, 0, sizeof p);
3115
3116         av++; ac--;
3117         /* Pipe number */
3118         if (ac && isdigit(**av)) {
3119                 i = atoi(*av); av++; ac--;
3120                 if (do_pipe == 1)
3121                         p.pipe_nr = i;
3122                 else
3123                         p.fs.fs_nr = i;
3124         }
3125         while (ac > 0) {
3126                 double d;
3127                 int tok = match_token(dummynet_params, *av);
3128                 ac--; av++;
3129
3130                 switch(tok) {
3131                 case TOK_NOERROR:
3132                         p.fs.flags_fs |= DN_NOERROR;
3133                         break;
3134
3135                 case TOK_PLR:
3136                         NEED1("plr needs argument 0..1\n");
3137                         d = strtod(av[0], NULL);
3138                         if (d > 1)
3139                                 d = 1;
3140                         else if (d < 0)
3141                                 d = 0;
3142                         p.fs.plr = (int)(d*0x7fffffff);
3143                         ac--; av++;
3144                         break;
3145
3146                 case TOK_QUEUE:
3147                         NEED1("queue needs queue size\n");
3148                         end = NULL;
3149                         p.fs.qsize = strtoul(av[0], &end, 0);
3150                         if (*end == 'K' || *end == 'k') {
3151                                 p.fs.flags_fs |= DN_QSIZE_IS_BYTES;
3152                                 p.fs.qsize *= 1024;
3153                         } else if (*end == 'B' ||
3154                             _substrcmp2(end, "by", "bytes") == 0) {
3155                                 p.fs.flags_fs |= DN_QSIZE_IS_BYTES;
3156                         }
3157                         ac--; av++;
3158                         break;
3159
3160                 case TOK_BUCKETS:
3161                         NEED1("buckets needs argument\n");
3162                         p.fs.rq_size = strtoul(av[0], NULL, 0);
3163                         ac--; av++;
3164                         break;
3165
3166                 case TOK_MASK:
3167                         NEED1("mask needs mask specifier\n");
3168                         /*
3169                          * per-flow queue, mask is dst_ip, dst_port,
3170                          * src_ip, src_port, proto measured in bits
3171                          */
3172                         par = NULL;
3173
3174                         bzero(&p.fs.flow_mask, sizeof(p.fs.flow_mask));
3175                         end = NULL;
3176
3177                         while (ac >= 1) {
3178                             uint32_t *p32 = NULL;
3179                             uint16_t *p16 = NULL;
3180                             uint32_t *p20 = NULL;
3181                             struct in6_addr *pa6 = NULL;
3182                             uint32_t a;
3183
3184                             tok = match_token(dummynet_params, *av);
3185                             ac--; av++;
3186                             switch(tok) {
3187                             case TOK_ALL:
3188                                     /*
3189                                      * special case, all bits significant
3190                                      */
3191                                     p.fs.flow_mask.dst_ip = ~0;
3192                                     p.fs.flow_mask.src_ip = ~0;
3193                                     p.fs.flow_mask.dst_port = ~0;
3194                                     p.fs.flow_mask.src_port = ~0;
3195                                     p.fs.flow_mask.proto = ~0;
3196                                     n2mask(&(p.fs.flow_mask.dst_ip6), 128);
3197                                     n2mask(&(p.fs.flow_mask.src_ip6), 128);
3198                                     p.fs.flow_mask.flow_id6 = ~0;
3199                                     p.fs.flags_fs |= DN_HAVE_FLOW_MASK;
3200                                     goto end_mask;
3201
3202                             case TOK_DSTIP:
3203                                     p32 = &p.fs.flow_mask.dst_ip;
3204                                     break;
3205
3206                             case TOK_SRCIP:
3207                                     p32 = &p.fs.flow_mask.src_ip;
3208                                     break;
3209
3210                             case TOK_DSTIP6:
3211                                     pa6 = &(p.fs.flow_mask.dst_ip6);
3212                                     break;
3213
3214                             case TOK_SRCIP6:
3215                                     pa6 = &(p.fs.flow_mask.src_ip6);
3216                                     break;
3217
3218                             case TOK_FLOWID:
3219                                     p20 = &p.fs.flow_mask.flow_id6;
3220                                     break;
3221
3222                             case TOK_DSTPORT:
3223                                     p16 = &p.fs.flow_mask.dst_port;
3224                                     break;
3225
3226                             case TOK_SRCPORT:
3227                                     p16 = &p.fs.flow_mask.src_port;
3228                                     break;
3229
3230                             case TOK_PROTO:
3231                                     break;
3232
3233                             default:
3234                                     ac++; av--; /* backtrack */
3235                                     goto end_mask;
3236                             }
3237                             if (ac < 1)
3238                                     errx(EX_USAGE, "mask: value missing");
3239                             if (*av[0] == '/') {
3240                                     a = strtoul(av[0]+1, &end, 0);
3241                                     if (pa6 == NULL)
3242                                             a = (a == 32) ? ~0 : (1 << a) - 1;
3243                             } else
3244                                     a = strtoul(av[0], &end, 0);
3245                             if (p32 != NULL)
3246                                     *p32 = a;
3247                             else if (p16 != NULL) {
3248                                     if (a > 0xFFFF)
3249                                             errx(EX_DATAERR,
3250                                                 "port mask must be 16 bit");
3251                                     *p16 = (uint16_t)a;
3252                             } else if (p20 != NULL) {
3253                                     if (a > 0xfffff)
3254                                         errx(EX_DATAERR,
3255                                             "flow_id mask must be 20 bit");
3256                                     *p20 = (uint32_t)a;
3257                             } else if (pa6 != NULL) {
3258                                     if (a < 0 || a > 128)
3259                                         errx(EX_DATAERR,
3260                                             "in6addr invalid mask len");
3261                                     else
3262                                         n2mask(pa6, a);
3263                             } else {
3264                                     if (a > 0xFF)
3265                                             errx(EX_DATAERR,
3266                                                 "proto mask must be 8 bit");
3267                                     p.fs.flow_mask.proto = (uint8_t)a;
3268                             }
3269                             if (a != 0)
3270                                     p.fs.flags_fs |= DN_HAVE_FLOW_MASK;
3271                             ac--; av++;
3272                         } /* end while, config masks */
3273 end_mask:
3274                         break;
3275
3276                 case TOK_RED:
3277                 case TOK_GRED:
3278                         NEED1("red/gred needs w_q/min_th/max_th/max_p\n");
3279                         p.fs.flags_fs |= DN_IS_RED;
3280                         if (tok == TOK_GRED)
3281                                 p.fs.flags_fs |= DN_IS_GENTLE_RED;
3282                         /*
3283                          * the format for parameters is w_q/min_th/max_th/max_p
3284                          */
3285                         if ((end = strsep(&av[0], "/"))) {
3286                             double w_q = strtod(end, NULL);
3287                             if (w_q > 1 || w_q <= 0)
3288                                 errx(EX_DATAERR, "0 < w_q <= 1");
3289                             p.fs.w_q = (int) (w_q * (1 << SCALE_RED));
3290                         }
3291                         if ((end = strsep(&av[0], "/"))) {
3292                             p.fs.min_th = strtoul(end, &end, 0);
3293                             if (*end == 'K' || *end == 'k')
3294                                 p.fs.min_th *= 1024;
3295                         }
3296                         if ((end = strsep(&av[0], "/"))) {
3297                             p.fs.max_th = strtoul(end, &end, 0);
3298                             if (*end == 'K' || *end == 'k')
3299                                 p.fs.max_th *= 1024;
3300                         }
3301                         if ((end = strsep(&av[0], "/"))) {
3302                             double max_p = strtod(end, NULL);
3303                             if (max_p > 1 || max_p <= 0)
3304                                 errx(EX_DATAERR, "0 < max_p <= 1");
3305                             p.fs.max_p = (int)(max_p * (1 << SCALE_RED));
3306                         }
3307                         ac--; av++;
3308                         break;
3309
3310                 case TOK_DROPTAIL:
3311                         p.fs.flags_fs &= ~(DN_IS_RED|DN_IS_GENTLE_RED);
3312                         break;
3313
3314                 case TOK_BW:
3315                         NEED1("bw needs bandwidth or interface\n");
3316                         if (do_pipe != 1)
3317                             errx(EX_DATAERR, "bandwidth only valid for pipes");
3318                         /*
3319                          * set clocking interface or bandwidth value
3320                          */
3321                         if (av[0][0] >= 'a' && av[0][0] <= 'z') {
3322                             int l = sizeof(p.if_name)-1;
3323                             /* interface name */
3324                             strncpy(p.if_name, av[0], l);
3325                             p.if_name[l] = '\0';
3326                             p.bandwidth = 0;
3327                         } else {
3328                             p.if_name[0] = '\0';
3329                             p.bandwidth = strtoul(av[0], &end, 0);
3330                             if (*end == 'K' || *end == 'k') {
3331                                 end++;
3332                                 p.bandwidth *= 1000;
3333                             } else if (*end == 'M') {
3334                                 end++;
3335                                 p.bandwidth *= 1000000;
3336                             }
3337                             if (*end == 'B' ||
3338                                 _substrcmp2(end, "by", "bytes") == 0)
3339                                 p.bandwidth *= 8;
3340                             if (p.bandwidth < 0)
3341                                 errx(EX_DATAERR, "bandwidth too large");
3342                         }
3343                         ac--; av++;
3344                         break;
3345
3346                 case TOK_DELAY:
3347                         if (do_pipe != 1)
3348                                 errx(EX_DATAERR, "delay only valid for pipes");
3349                         NEED1("delay needs argument 0..10000ms\n");
3350                         p.delay = strtoul(av[0], NULL, 0);
3351                         ac--; av++;
3352                         break;
3353
3354                 case TOK_WEIGHT:
3355                         if (do_pipe == 1)
3356                                 errx(EX_DATAERR,"weight only valid for queues");
3357                         NEED1("weight needs argument 0..100\n");
3358                         p.fs.weight = strtoul(av[0], &end, 0);
3359                         ac--; av++;
3360                         break;
3361
3362                 case TOK_PIPE:
3363                         if (do_pipe == 1)
3364                                 errx(EX_DATAERR,"pipe only valid for queues");
3365                         NEED1("pipe needs pipe_number\n");
3366                         p.fs.parent_nr = strtoul(av[0], &end, 0);
3367                         ac--; av++;
3368                         break;
3369
3370                 default:
3371                         errx(EX_DATAERR, "unrecognised option ``%s''", av[-1]);
3372                 }
3373         }
3374         if (do_pipe == 1) {
3375                 if (p.pipe_nr == 0)
3376                         errx(EX_DATAERR, "pipe_nr must be > 0");
3377                 if (p.delay > 10000)
3378                         errx(EX_DATAERR, "delay must be < 10000");
3379         } else { /* do_pipe == 2, queue */
3380                 if (p.fs.parent_nr == 0)
3381                         errx(EX_DATAERR, "pipe must be > 0");
3382                 if (p.fs.weight >100)
3383                         errx(EX_DATAERR, "weight must be <= 100");
3384         }
3385         if (p.fs.flags_fs & DN_QSIZE_IS_BYTES) {
3386                 if (p.fs.qsize > 1024*1024)
3387                         errx(EX_DATAERR, "queue size must be < 1MB");
3388         } else {
3389                 if (p.fs.qsize > 100)
3390                         errx(EX_DATAERR, "2 <= queue size <= 100");
3391         }
3392         if (p.fs.flags_fs & DN_IS_RED) {
3393                 size_t len;
3394                 int lookup_depth, avg_pkt_size;
3395                 double s, idle, weight, w_q;
3396                 struct clockinfo ck;
3397                 int t;
3398
3399                 if (p.fs.min_th >= p.fs.max_th)
3400                     errx(EX_DATAERR, "min_th %d must be < than max_th %d",
3401                         p.fs.min_th, p.fs.max_th);
3402                 if (p.fs.max_th == 0)
3403                     errx(EX_DATAERR, "max_th must be > 0");
3404
3405                 len = sizeof(int);
3406                 if (sysctlbyname("net.inet.ip.dummynet.red_lookup_depth",
3407                         &lookup_depth, &len, NULL, 0) == -1)
3408
3409                     errx(1, "sysctlbyname(\"%s\")",
3410                         "net.inet.ip.dummynet.red_lookup_depth");
3411                 if (lookup_depth == 0)
3412                     errx(EX_DATAERR, "net.inet.ip.dummynet.red_lookup_depth"
3413                         " must be greater than zero");
3414
3415                 len = sizeof(int);
3416                 if (sysctlbyname("net.inet.ip.dummynet.red_avg_pkt_size",
3417                         &avg_pkt_size, &len, NULL, 0) == -1)
3418
3419                     errx(1, "sysctlbyname(\"%s\")",
3420                         "net.inet.ip.dummynet.red_avg_pkt_size");
3421                 if (avg_pkt_size == 0)
3422                         errx(EX_DATAERR,
3423                             "net.inet.ip.dummynet.red_avg_pkt_size must"
3424                             " be greater than zero");
3425
3426                 len = sizeof(struct clockinfo);
3427                 if (sysctlbyname("kern.clockrate", &ck, &len, NULL, 0) == -1)
3428                         errx(1, "sysctlbyname(\"%s\")", "kern.clockrate");
3429
3430                 /*
3431                  * Ticks needed for sending a medium-sized packet.
3432                  * Unfortunately, when we are configuring a WF2Q+ queue, we
3433                  * do not have bandwidth information, because that is stored
3434                  * in the parent pipe, and also we have multiple queues
3435                  * competing for it. So we set s=0, which is not very
3436                  * correct. But on the other hand, why do we want RED with
3437                  * WF2Q+ ?
3438                  */
3439                 if (p.bandwidth==0) /* this is a WF2Q+ queue */
3440                         s = 0;
3441                 else
3442                         s = ck.hz * avg_pkt_size * 8 / p.bandwidth;
3443
3444                 /*
3445                  * max idle time (in ticks) before avg queue size becomes 0.
3446                  * NOTA:  (3/w_q) is approx the value x so that
3447                  * (1-w_q)^x < 10^-3.
3448                  */
3449                 w_q = ((double)p.fs.w_q) / (1 << SCALE_RED);
3450                 idle = s * 3. / w_q;
3451                 p.fs.lookup_step = (int)idle / lookup_depth;
3452                 if (!p.fs.lookup_step)
3453                         p.fs.lookup_step = 1;
3454                 weight = 1 - w_q;
3455                 for (t = p.fs.lookup_step; t > 0; --t)
3456                         weight *= weight;
3457                 p.fs.lookup_weight = (int)(weight * (1 << SCALE_RED));
3458         }
3459         i = do_cmd(IP_DUMMYNET_CONFIGURE, &p, sizeof p);
3460         if (i)
3461                 err(1, "setsockopt(%s)", "IP_DUMMYNET_CONFIGURE");
3462 }
3463
3464 static void
3465 get_mac_addr_mask(char *p, uint8_t *addr, uint8_t *mask)
3466 {
3467         int i, l;
3468
3469         for (i=0; i<6; i++)
3470                 addr[i] = mask[i] = 0;
3471         if (strcmp(p, "any") == 0)
3472                 return;
3473
3474         for (i=0; *p && i<6;i++, p++) {
3475                 addr[i] = strtol(p, &p, 16);
3476                 if (*p != ':') /* we start with the mask */
3477                         break;
3478         }
3479         if (*p == '/') { /* mask len */
3480                 l = strtol(p+1, &p, 0);
3481                 for (i=0; l>0; l -=8, i++)
3482                         mask[i] = (l >=8) ? 0xff : (~0) << (8-l);
3483         } else if (*p == '&') { /* mask */
3484                 for (i=0, p++; *p && i<6;i++, p++) {
3485                         mask[i] = strtol(p, &p, 16);
3486                         if (*p != ':')
3487                                 break;
3488                 }
3489         } else if (*p == '\0') {
3490                 for (i=0; i<6; i++)
3491                         mask[i] = 0xff;
3492         }
3493         for (i=0; i<6; i++)
3494                 addr[i] &= mask[i];
3495 }
3496
3497 /*
3498  * helper function, updates the pointer to cmd with the length
3499  * of the current command, and also cleans up the first word of
3500  * the new command in case it has been clobbered before.
3501  */
3502 static ipfw_insn *
3503 next_cmd(ipfw_insn *cmd)
3504 {
3505         cmd += F_LEN(cmd);
3506         bzero(cmd, sizeof(*cmd));
3507         return cmd;
3508 }
3509
3510 /*
3511  * Takes arguments and copies them into a comment
3512  */
3513 static void
3514 fill_comment(ipfw_insn *cmd, int ac, char **av)
3515 {
3516         int i, l;
3517         char *p = (char *)(cmd + 1);
3518
3519         cmd->opcode = O_NOP;
3520         cmd->len =  (cmd->len & (F_NOT | F_OR));
3521
3522         /* Compute length of comment string. */
3523         for (i = 0, l = 0; i < ac; i++)
3524                 l += strlen(av[i]) + 1;
3525         if (l == 0)
3526                 return;
3527         if (l > 84)
3528                 errx(EX_DATAERR,
3529                     "comment too long (max 80 chars)");
3530         l = 1 + (l+3)/4;
3531         cmd->len =  (cmd->len & (F_NOT | F_OR)) | l;
3532         for (i = 0; i < ac; i++) {
3533                 strcpy(p, av[i]);
3534                 p += strlen(av[i]);
3535                 *p++ = ' ';
3536         }
3537         *(--p) = '\0';
3538 }
3539
3540 /*
3541  * A function to fill simple commands of size 1.
3542  * Existing flags are preserved.
3543  */
3544 static void
3545 fill_cmd(ipfw_insn *cmd, enum ipfw_opcodes opcode, int flags, uint16_t arg)
3546 {
3547         cmd->opcode = opcode;
3548         cmd->len =  ((cmd->len | flags) & (F_NOT | F_OR)) | 1;
3549         cmd->arg1 = arg;
3550 }
3551
3552 /*
3553  * Fetch and add the MAC address and type, with masks. This generates one or
3554  * two microinstructions, and returns the pointer to the last one.
3555  */
3556 static ipfw_insn *
3557 add_mac(ipfw_insn *cmd, int ac, char *av[])
3558 {
3559         ipfw_insn_mac *mac;
3560
3561         if (ac < 2)
3562                 errx(EX_DATAERR, "MAC dst src");
3563
3564         cmd->opcode = O_MACADDR2;
3565         cmd->len = (cmd->len & (F_NOT | F_OR)) | F_INSN_SIZE(ipfw_insn_mac);
3566
3567         mac = (ipfw_insn_mac *)cmd;
3568         get_mac_addr_mask(av[0], mac->addr, mac->mask); /* dst */
3569         get_mac_addr_mask(av[1], &(mac->addr[6]), &(mac->mask[6])); /* src */
3570         return cmd;
3571 }
3572
3573 static ipfw_insn *
3574 add_mactype(ipfw_insn *cmd, int ac, char *av)
3575 {
3576         if (ac < 1)
3577                 errx(EX_DATAERR, "missing MAC type");
3578         if (strcmp(av, "any") != 0) { /* we have a non-null type */
3579                 fill_newports((ipfw_insn_u16 *)cmd, av, IPPROTO_ETHERTYPE);
3580                 cmd->opcode = O_MAC_TYPE;
3581                 return cmd;
3582         } else
3583                 return NULL;
3584 }
3585
3586 static ipfw_insn *
3587 add_proto0(ipfw_insn *cmd, char *av, u_char *protop)
3588 {
3589         struct protoent *pe;
3590         char *ep;
3591         int proto;
3592
3593         proto = strtol(av, &ep, 0);
3594         if (*ep != '\0' || proto < 0) {
3595                 if ((pe = getprotobyname(av)) == NULL)
3596                         return NULL;
3597                 proto = pe->p_proto;
3598         }
3599
3600         fill_cmd(cmd, O_PROTO, 0, proto);
3601         *protop = proto;
3602         return cmd;
3603 }
3604
3605 static ipfw_insn *
3606 add_proto(ipfw_insn *cmd, char *av, u_char *protop)
3607 {
3608         u_char proto = IPPROTO_IP;
3609
3610         if (_substrcmp(av, "all") == 0)
3611                 ; /* do not set O_IP4 nor O_IP6 */
3612         else if (strcmp(av, "ip4") == 0)
3613                 /* explicit "just IPv4" rule */
3614                 fill_cmd(cmd, O_IP4, 0, 0);
3615         else if (strcmp(av, "ip6") == 0) {
3616                 /* explicit "just IPv6" rule */
3617                 proto = IPPROTO_IPV6;
3618                 fill_cmd(cmd, O_IP6, 0, 0);
3619         } else
3620                 return add_proto0(cmd, av, protop);
3621
3622         *protop = proto;
3623         return cmd;
3624 }
3625
3626 static ipfw_insn *
3627 add_proto_compat(ipfw_insn *cmd, char *av, u_char *protop)
3628 {
3629         u_char proto = IPPROTO_IP;
3630
3631         if (_substrcmp(av, "all") == 0 || strcmp(av, "ip") == 0)
3632                 ; /* do not set O_IP4 nor O_IP6 */
3633         else if (strcmp(av, "ipv4") == 0 || strcmp(av, "ip4") == 0)
3634                 /* explicit "just IPv4" rule */
3635                 fill_cmd(cmd, O_IP4, 0, 0);
3636         else if (strcmp(av, "ipv6") == 0 || strcmp(av, "ip6") == 0) {
3637                 /* explicit "just IPv6" rule */
3638                 proto = IPPROTO_IPV6;
3639                 fill_cmd(cmd, O_IP6, 0, 0);
3640         } else
3641                 return add_proto0(cmd, av, protop);
3642
3643         *protop = proto;
3644         return cmd;
3645 }
3646
3647 static ipfw_insn *
3648 add_srcip(ipfw_insn *cmd, char *av)
3649 {
3650         fill_ip((ipfw_insn_ip *)cmd, av);
3651         if (cmd->opcode == O_IP_DST_SET)                        /* set */
3652                 cmd->opcode = O_IP_SRC_SET;
3653         else if (cmd->opcode == O_IP_DST_LOOKUP)                /* table */
3654                 cmd->opcode = O_IP_SRC_LOOKUP;
3655         else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn))          /* me */
3656                 cmd->opcode = O_IP_SRC_ME;
3657         else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_u32))      /* one IP */
3658                 cmd->opcode = O_IP_SRC;
3659         else                                                    /* addr/mask */
3660                 cmd->opcode = O_IP_SRC_MASK;
3661         return cmd;
3662 }
3663
3664 static ipfw_insn *
3665 add_dstip(ipfw_insn *cmd, char *av)
3666 {
3667         fill_ip((ipfw_insn_ip *)cmd, av);
3668         if (cmd->opcode == O_IP_DST_SET)                        /* set */
3669                 ;
3670         else if (cmd->opcode == O_IP_DST_LOOKUP)                /* table */
3671                 ;
3672         else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn))          /* me */
3673                 cmd->opcode = O_IP_DST_ME;
3674         else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_u32))      /* one IP */
3675                 cmd->opcode = O_IP_DST;
3676         else                                                    /* addr/mask */
3677                 cmd->opcode = O_IP_DST_MASK;
3678         return cmd;
3679 }
3680
3681 static ipfw_insn *
3682 add_ports(ipfw_insn *cmd, char *av, u_char proto, int opcode)
3683 {
3684         if (_substrcmp(av, "any") == 0) {
3685                 return NULL;
3686         } else if (fill_newports((ipfw_insn_u16 *)cmd, av, proto)) {
3687                 /* XXX todo: check that we have a protocol with ports */
3688                 cmd->opcode = opcode;
3689                 return cmd;
3690         }
3691         return NULL;
3692 }
3693
3694 static ipfw_insn *
3695 add_src(ipfw_insn *cmd, char *av, u_char proto)
3696 {
3697         struct in6_addr a;
3698
3699         if (proto == IPPROTO_IPV6  || strcmp(av, "me6") == 0 ||
3700             inet_pton(AF_INET6, av, &a))
3701                 return add_srcip6(cmd, av);
3702         /* XXX: should check for IPv4, not !IPv6 */
3703         if (proto == IPPROTO_IP || strcmp(av, "me") == 0 ||
3704             !inet_pton(AF_INET6, av, &a))
3705                 return add_srcip(cmd, av);
3706         if (strcmp(av, "any") != 0)
3707                 return cmd;
3708
3709         return NULL;
3710 }
3711
3712 static ipfw_insn *
3713 add_dst(ipfw_insn *cmd, char *av, u_char proto)
3714 {
3715         struct in6_addr a;
3716
3717         if (proto == IPPROTO_IPV6  || strcmp(av, "me6") == 0 ||
3718             inet_pton(AF_INET6, av, &a))
3719                 return add_dstip6(cmd, av);
3720         /* XXX: should check for IPv4, not !IPv6 */
3721         if (proto == IPPROTO_IP || strcmp(av, "me") == 0 ||
3722             !inet_pton(AF_INET6, av, &a))
3723                 return add_dstip(cmd, av);
3724         if (strcmp(av, "any") != 0)
3725                 return cmd;
3726
3727         return NULL;
3728 }
3729
3730 /*
3731  * Parse arguments and assemble the microinstructions which make up a rule.
3732  * Rules are added into the 'rulebuf' and then copied in the correct order
3733  * into the actual rule.
3734  *
3735  * The syntax for a rule starts with the action, followed by
3736  * optional action parameters, and the various match patterns.
3737  * In the assembled microcode, the first opcode must be an O_PROBE_STATE
3738  * (generated if the rule includes a keep-state option), then the
3739  * various match patterns, log/altq actions, and the actual action.
3740  *
3741  */
3742 static void
3743 add(int ac, char *av[])
3744 {
3745         /*
3746          * rules are added into the 'rulebuf' and then copied in
3747          * the correct order into the actual rule.
3748          * Some things that need to go out of order (prob, action etc.)
3749          * go into actbuf[].
3750          */
3751         static uint32_t rulebuf[255], actbuf[255], cmdbuf[255];
3752
3753         ipfw_insn *src, *dst, *cmd, *action, *prev=NULL;
3754         ipfw_insn *first_cmd;   /* first match pattern */
3755
3756         struct ip_fw *rule;
3757
3758         /*
3759          * various flags used to record that we entered some fields.
3760          */
3761         ipfw_insn *have_state = NULL;   /* check-state or keep-state */
3762         ipfw_insn *have_log = NULL, *have_altq = NULL;
3763         size_t len;
3764
3765         int i;
3766
3767         int open_par = 0;       /* open parenthesis ( */
3768
3769         /* proto is here because it is used to fetch ports */
3770         u_char proto = IPPROTO_IP;      /* default protocol */
3771
3772         double match_prob = 1; /* match probability, default is always match */
3773
3774         bzero(actbuf, sizeof(actbuf));          /* actions go here */
3775         bzero(cmdbuf, sizeof(cmdbuf));
3776         bzero(rulebuf, sizeof(rulebuf));
3777
3778         rule = (struct ip_fw *)rulebuf;
3779         cmd = (ipfw_insn *)cmdbuf;
3780         action = (ipfw_insn *)actbuf;
3781
3782         av++; ac--;
3783
3784         /* [rule N]     -- Rule number optional */
3785         if (ac && isdigit(**av)) {
3786                 rule->rulenum = atoi(*av);
3787                 av++;
3788                 ac--;
3789         }
3790
3791         /* [set N]      -- set number (0..RESVD_SET), optional */
3792         if (ac > 1 && _substrcmp(*av, "set") == 0) {
3793                 int set = strtoul(av[1], NULL, 10);
3794                 if (set < 0 || set > RESVD_SET)
3795                         errx(EX_DATAERR, "illegal set %s", av[1]);
3796                 rule->set = set;
3797                 av += 2; ac -= 2;
3798         }
3799
3800         /* [prob D]     -- match probability, optional */
3801         if (ac > 1 && _substrcmp(*av, "prob") == 0) {
3802                 match_prob = strtod(av[1], NULL);
3803
3804                 if (match_prob <= 0 || match_prob > 1)
3805                         errx(EX_DATAERR, "illegal match prob. %s", av[1]);
3806                 av += 2; ac -= 2;
3807         }
3808
3809         /* action       -- mandatory */
3810         NEED1("missing action");
3811         i = match_token(rule_actions, *av);
3812         ac--; av++;
3813         action->len = 1;        /* default */
3814         switch(i) {
3815         case TOK_CHECKSTATE:
3816                 have_state = action;
3817                 action->opcode = O_CHECK_STATE;
3818                 break;
3819
3820         case TOK_ACCEPT:
3821                 action->opcode = O_ACCEPT;
3822                 break;
3823
3824         case TOK_DENY:
3825                 action->opcode = O_DENY;
3826                 action->arg1 = 0;
3827                 break;
3828
3829         case TOK_REJECT:
3830                 action->opcode = O_REJECT;
3831                 action->arg1 = ICMP_UNREACH_HOST;
3832                 break;
3833
3834         case TOK_RESET:
3835                 action->opcode = O_REJECT;
3836                 action->arg1 = ICMP_REJECT_RST;
3837                 break;
3838
3839         case TOK_RESET6:
3840                 action->opcode = O_UNREACH6;
3841                 action->arg1 = ICMP6_UNREACH_RST;
3842                 break;
3843
3844         case TOK_UNREACH:
3845                 action->opcode = O_REJECT;
3846                 NEED1("missing reject code");
3847                 fill_reject_code(&action->arg1, *av);
3848                 ac--; av++;
3849                 break;
3850
3851         case TOK_UNREACH6:
3852                 action->opcode = O_UNREACH6;
3853                 NEED1("missing unreach code");
3854                 fill_unreach6_code(&action->arg1, *av);
3855                 ac--; av++;
3856                 break;
3857
3858         case TOK_COUNT:
3859                 action->opcode = O_COUNT;
3860                 break;
3861
3862         case TOK_QUEUE:
3863                 action->opcode = O_QUEUE;
3864                 goto chkarg;
3865         case TOK_PIPE:
3866                 action->opcode = O_PIPE;
3867                 goto chkarg;
3868         case TOK_SKIPTO:
3869                 action->opcode = O_SKIPTO;
3870                 goto chkarg;
3871         case TOK_NETGRAPH:
3872                 action->opcode = O_NETGRAPH;
3873                 goto chkarg;
3874         case TOK_NGTEE:
3875                 action->opcode = O_NGTEE;
3876                 goto chkarg;
3877         case TOK_DIVERT:
3878                 action->opcode = O_DIVERT;
3879                 goto chkarg;
3880         case TOK_TEE:
3881                 action->opcode = O_TEE;
3882 chkarg:
3883                 if (!ac)
3884                         errx(EX_USAGE, "missing argument for %s", *(av - 1));
3885                 if (isdigit(**av)) {
3886                         action->arg1 = strtoul(*av, NULL, 10);
3887                         if (action->arg1 <= 0 || action->arg1 >= IP_FW_TABLEARG)
3888                                 errx(EX_DATAERR, "illegal argument for %s",
3889                                     *(av - 1));
3890                 } else if (_substrcmp(*av, TABLEARG) == 0) {
3891                         action->arg1 = IP_FW_TABLEARG;
3892                 } else if (i == TOK_DIVERT || i == TOK_TEE) {
3893                         struct servent *s;
3894                         setservent(1);
3895                         s = getservbyname(av[0], "divert");
3896                         if (s != NULL)
3897                                 action->arg1 = ntohs(s->s_port);
3898                         else
3899                                 errx(EX_DATAERR, "illegal divert/tee port");
3900                 } else
3901                         errx(EX_DATAERR, "illegal argument for %s", *(av - 1));
3902                 ac--; av++;
3903                 break;
3904
3905         case TOK_FORWARD: {
3906                 ipfw_insn_sa *p = (ipfw_insn_sa *)action;
3907                 char *s, *end;
3908
3909                 NEED1("missing forward address[:port]");
3910
3911                 action->opcode = O_FORWARD_IP;
3912                 action->len = F_INSN_SIZE(ipfw_insn_sa);
3913
3914                 p->sa.sin_len = sizeof(struct sockaddr_in);
3915                 p->sa.sin_family = AF_INET;
3916                 p->sa.sin_port = 0;
3917                 /*
3918                  * locate the address-port separator (':' or ',')
3919                  */
3920                 s = strchr(*av, ':');
3921                 if (s == NULL)
3922                         s = strchr(*av, ',');
3923                 if (s != NULL) {
3924                         *(s++) = '\0';
3925                         i = strtoport(s, &end, 0 /* base */, 0 /* proto */);
3926                         if (s == end)
3927                                 errx(EX_DATAERR,
3928                                     "illegal forwarding port ``%s''", s);
3929                         p->sa.sin_port = (u_short)i;
3930                 }
3931                 lookup_host(*av, &(p->sa.sin_addr));
3932                 }
3933                 ac--; av++;
3934                 break;
3935
3936         case TOK_COMMENT:
3937                 /* pretend it is a 'count' rule followed by the comment */
3938                 action->opcode = O_COUNT;
3939                 ac++; av--;     /* go back... */
3940                 break;
3941
3942         default:
3943                 errx(EX_DATAERR, "invalid action %s\n", av[-1]);
3944         }
3945         action = next_cmd(action);
3946
3947         /*
3948          * [altq queuename] -- altq tag, optional
3949          * [log [logamount N]]  -- log, optional
3950          *
3951          * If they exist, it go first in the cmdbuf, but then it is
3952          * skipped in the copy section to the end of the buffer.
3953          */
3954         while (ac != 0 && (i = match_token(rule_action_params, *av)) != -1) {
3955                 ac--; av++;
3956                 switch (i) {
3957                 case TOK_LOG:
3958                     {
3959                         ipfw_insn_log *c = (ipfw_insn_log *)cmd;
3960                         int l;
3961
3962                         if (have_log)
3963                                 errx(EX_DATAERR,
3964                                     "log cannot be specified more than once");
3965                         have_log = (ipfw_insn *)c;
3966                         cmd->len = F_INSN_SIZE(ipfw_insn_log);
3967                         cmd->opcode = O_LOG;
3968                         if (ac && _substrcmp(*av, "logamount") == 0) {
3969                                 ac--; av++;
3970                                 NEED1("logamount requires argument");
3971                                 l = atoi(*av);
3972                                 if (l < 0)
3973                                         errx(EX_DATAERR,
3974                                             "logamount must be positive");
3975                                 c->max_log = l;
3976                                 ac--; av++;
3977                         } else {
3978                                 len = sizeof(c->max_log);
3979                                 if (sysctlbyname("net.inet.ip.fw.verbose_limit",
3980                                     &c->max_log, &len, NULL, 0) == -1)
3981                                         errx(1, "sysctlbyname(\"%s\")",
3982                                             "net.inet.ip.fw.verbose_limit");
3983                         }
3984                     }
3985                         break;
3986
3987                 case TOK_ALTQ:
3988                     {
3989                         ipfw_insn_altq *a = (ipfw_insn_altq *)cmd;
3990
3991                         NEED1("missing altq queue name");
3992                         if (have_altq)
3993                                 errx(EX_DATAERR,
3994                                     "altq cannot be specified more than once");
3995                         have_altq = (ipfw_insn *)a;
3996                         cmd->len = F_INSN_SIZE(ipfw_insn_altq);
3997                         cmd->opcode = O_ALTQ;
3998                         fill_altq_qid(&a->qid, *av);
3999                         ac--; av++;
4000                     }
4001                         break;
4002
4003                 default:
4004                         abort();
4005                 }
4006                 cmd = next_cmd(cmd);
4007         }
4008
4009         if (have_state) /* must be a check-state, we are done */
4010                 goto done;
4011
4012 #define OR_START(target)                                        \
4013         if (ac && (*av[0] == '(' || *av[0] == '{')) {           \
4014                 if (open_par)                                   \
4015                         errx(EX_USAGE, "nested \"(\" not allowed\n"); \
4016                 prev = NULL;                                    \
4017                 open_par = 1;                                   \
4018                 if ( (av[0])[1] == '\0') {                      \
4019                         ac--; av++;                             \
4020                 } else                                          \
4021                         (*av)++;                                \
4022         }                                                       \
4023         target:                                                 \
4024
4025
4026 #define CLOSE_PAR                                               \
4027         if (open_par) {                                         \
4028                 if (ac && (                                     \
4029                     strcmp(*av, ")") == 0 ||                    \
4030                     strcmp(*av, "}") == 0)) {                   \
4031                         prev = NULL;                            \
4032                         open_par = 0;                           \
4033                         ac--; av++;                             \
4034                 } else                                          \
4035                         errx(EX_USAGE, "missing \")\"\n");      \
4036         }
4037
4038 #define NOT_BLOCK                                               \
4039         if (ac && _substrcmp(*av, "not") == 0) {                \
4040                 if (cmd->len & F_NOT)                           \
4041                         errx(EX_USAGE, "double \"not\" not allowed\n"); \
4042                 cmd->len |= F_NOT;                              \
4043                 ac--; av++;                                     \
4044         }
4045
4046 #define OR_BLOCK(target)                                        \
4047         if (ac && _substrcmp(*av, "or") == 0) {         \
4048                 if (prev == NULL || open_par == 0)              \
4049                         errx(EX_DATAERR, "invalid OR block");   \
4050                 prev->len |= F_OR;                              \
4051                 ac--; av++;                                     \
4052                 goto target;                                    \
4053         }                                                       \
4054         CLOSE_PAR;
4055
4056         first_cmd = cmd;
4057
4058 #if 0
4059         /*
4060          * MAC addresses, optional.
4061          * If we have this, we skip the part "proto from src to dst"
4062          * and jump straight to the option parsing.
4063          */
4064         NOT_BLOCK;
4065         NEED1("missing protocol");
4066         if (_substrcmp(*av, "MAC") == 0 ||
4067             _substrcmp(*av, "mac") == 0) {
4068                 ac--; av++;     /* the "MAC" keyword */
4069                 add_mac(cmd, ac, av); /* exits in case of errors */
4070                 cmd = next_cmd(cmd);
4071                 ac -= 2; av += 2;       /* dst-mac and src-mac */
4072                 NOT_BLOCK;
4073                 NEED1("missing mac type");
4074                 if (add_mactype(cmd, ac, av[0]))
4075                         cmd = next_cmd(cmd);
4076                 ac--; av++;     /* any or mac-type */
4077                 goto read_options;
4078         }
4079 #endif
4080
4081         /*
4082          * protocol, mandatory
4083          */
4084     OR_START(get_proto);
4085         NOT_BLOCK;
4086         NEED1("missing protocol");
4087         if (add_proto_compat(cmd, *av, &proto)) {
4088                 av++; ac--;
4089                 if (F_LEN(cmd) != 0) {
4090                         prev = cmd;
4091                         cmd = next_cmd(cmd);
4092                 }
4093         } else if (first_cmd != cmd) {
4094                 errx(EX_DATAERR, "invalid protocol ``%s''", *av);
4095         } else
4096                 goto read_options;
4097     OR_BLOCK(get_proto);
4098
4099         /*
4100          * "from", mandatory
4101          */
4102         if (!ac || _substrcmp(*av, "from") != 0)
4103                 errx(EX_USAGE, "missing ``from''");
4104         ac--; av++;
4105
4106         /*
4107          * source IP, mandatory
4108          */
4109     OR_START(source_ip);
4110         NOT_BLOCK;      /* optional "not" */
4111         NEED1("missing source address");
4112         if (add_src(cmd, *av, proto)) {
4113                 ac--; av++;
4114                 if (F_LEN(cmd) != 0) {  /* ! any */
4115                         prev = cmd;
4116                         cmd = next_cmd(cmd);
4117                 }
4118         } else
4119                 errx(EX_USAGE, "bad source address %s", *av);
4120     OR_BLOCK(source_ip);
4121
4122         /*
4123          * source ports, optional
4124          */
4125         NOT_BLOCK;      /* optional "not" */
4126         if (ac) {
4127                 if (_substrcmp(*av, "any") == 0 ||
4128                     add_ports(cmd, *av, proto, O_IP_SRCPORT)) {
4129                         ac--; av++;
4130                         if (F_LEN(cmd) != 0)
4131                                 cmd = next_cmd(cmd);
4132                 }
4133         }
4134
4135         /*
4136          * "to", mandatory
4137          */
4138         if (!ac || _substrcmp(*av, "to") != 0)
4139                 errx(EX_USAGE, "missing ``to''");
4140         av++; ac--;
4141
4142         /*
4143          * destination, mandatory
4144          */
4145     OR_START(dest_ip);
4146         NOT_BLOCK;      /* optional "not" */
4147         NEED1("missing dst address");
4148         if (add_dst(cmd, *av, proto)) {
4149                 ac--; av++;
4150                 if (F_LEN(cmd) != 0) {  /* ! any */
4151                         prev = cmd;
4152                         cmd = next_cmd(cmd);
4153                 }
4154         } else
4155                 errx( EX_USAGE, "bad destination address %s", *av);
4156     OR_BLOCK(dest_ip);
4157
4158         /*
4159          * dest. ports, optional
4160          */
4161         NOT_BLOCK;      /* optional "not" */
4162         if (ac) {
4163                 if (_substrcmp(*av, "any") == 0 ||
4164                     add_ports(cmd, *av, proto, O_IP_DSTPORT)) {
4165                         ac--; av++;
4166                         if (F_LEN(cmd) != 0)
4167                                 cmd = next_cmd(cmd);
4168                 }
4169         }
4170
4171 read_options:
4172         if (ac && first_cmd == cmd) {
4173                 /*
4174                  * nothing specified so far, store in the rule to ease
4175                  * printout later.
4176                  */
4177                  rule->_pad = 1;
4178         }
4179         prev = NULL;
4180         while (ac) {
4181                 char *s;
4182                 ipfw_insn_u32 *cmd32;   /* alias for cmd */
4183
4184                 s = *av;
4185                 cmd32 = (ipfw_insn_u32 *)cmd;
4186
4187                 if (*s == '!') {        /* alternate syntax for NOT */
4188                         if (cmd->len & F_NOT)
4189                                 errx(EX_USAGE, "double \"not\" not allowed\n");
4190                         cmd->len = F_NOT;
4191                         s++;
4192                 }
4193                 i = match_token(rule_options, s);
4194                 ac--; av++;
4195                 switch(i) {
4196                 case TOK_NOT:
4197                         if (cmd->len & F_NOT)
4198                                 errx(EX_USAGE, "double \"not\" not allowed\n");
4199                         cmd->len = F_NOT;
4200                         break;
4201
4202                 case TOK_OR:
4203                         if (open_par == 0 || prev == NULL)
4204                                 errx(EX_USAGE, "invalid \"or\" block\n");
4205                         prev->len |= F_OR;
4206                         break;
4207
4208                 case TOK_STARTBRACE:
4209                         if (open_par)
4210                                 errx(EX_USAGE, "+nested \"(\" not allowed\n");
4211                         open_par = 1;
4212                         break;
4213
4214                 case TOK_ENDBRACE:
4215                         if (!open_par)
4216                                 errx(EX_USAGE, "+missing \")\"\n");
4217                         open_par = 0;
4218                         prev = NULL;
4219                         break;
4220
4221                 case TOK_IN:
4222                         fill_cmd(cmd, O_IN, 0, 0);
4223                         break;
4224
4225                 case TOK_OUT:
4226                         cmd->len ^= F_NOT; /* toggle F_NOT */
4227                         fill_cmd(cmd, O_IN, 0, 0);
4228                         break;
4229
4230                 case TOK_DIVERTED:
4231                         fill_cmd(cmd, O_DIVERTED, 0, 3);
4232                         break;
4233
4234                 case TOK_DIVERTEDLOOPBACK:
4235                         fill_cmd(cmd, O_DIVERTED, 0, 1);
4236                         break;
4237
4238                 case TOK_DIVERTEDOUTPUT:
4239                         fill_cmd(cmd, O_DIVERTED, 0, 2);
4240                         break;
4241
4242                 case TOK_FRAG:
4243                         fill_cmd(cmd, O_FRAG, 0, 0);
4244                         break;
4245
4246                 case TOK_LAYER2:
4247                         fill_cmd(cmd, O_LAYER2, 0, 0);
4248                         break;
4249
4250                 case TOK_XMIT:
4251                 case TOK_RECV:
4252                 case TOK_VIA:
4253                         NEED1("recv, xmit, via require interface name"
4254                                 " or address");
4255                         fill_iface((ipfw_insn_if *)cmd, av[0]);
4256                         ac--; av++;
4257                         if (F_LEN(cmd) == 0)    /* not a valid address */
4258                                 break;
4259                         if (i == TOK_XMIT)
4260                                 cmd->opcode = O_XMIT;
4261                         else if (i == TOK_RECV)
4262                                 cmd->opcode = O_RECV;
4263                         else if (i == TOK_VIA)
4264                                 cmd->opcode = O_VIA;
4265                         break;
4266
4267                 case TOK_ICMPTYPES:
4268                         NEED1("icmptypes requires list of types");
4269                         fill_icmptypes((ipfw_insn_u32 *)cmd, *av);
4270                         av++; ac--;
4271                         break;
4272
4273                 case TOK_ICMP6TYPES:
4274                         NEED1("icmptypes requires list of types");
4275                         fill_icmp6types((ipfw_insn_icmp6 *)cmd, *av);
4276                         av++; ac--;
4277                         break;
4278
4279                 case TOK_IPTTL:
4280                         NEED1("ipttl requires TTL");
4281                         if (strpbrk(*av, "-,")) {
4282                             if (!add_ports(cmd, *av, 0, O_IPTTL))
4283                                 errx(EX_DATAERR, "invalid ipttl %s", *av);
4284                         } else
4285                             fill_cmd(cmd, O_IPTTL, 0, strtoul(*av, NULL, 0));
4286                         ac--; av++;
4287                         break;
4288
4289                 case TOK_IPID:
4290                         NEED1("ipid requires id");
4291                         if (strpbrk(*av, "-,")) {
4292                             if (!add_ports(cmd, *av, 0, O_IPID))
4293                                 errx(EX_DATAERR, "invalid ipid %s", *av);
4294                         } else
4295                             fill_cmd(cmd, O_IPID, 0, strtoul(*av, NULL, 0));
4296                         ac--; av++;
4297                         break;
4298
4299                 case TOK_IPLEN:
4300                         NEED1("iplen requires length");
4301                         if (strpbrk(*av, "-,")) {
4302                             if (!add_ports(cmd, *av, 0, O_IPLEN))
4303                                 errx(EX_DATAERR, "invalid ip len %s", *av);
4304                         } else
4305                             fill_cmd(cmd, O_IPLEN, 0, strtoul(*av, NULL, 0));
4306                         ac--; av++;
4307                         break;
4308
4309                 case TOK_IPVER:
4310                         NEED1("ipver requires version");
4311                         fill_cmd(cmd, O_IPVER, 0, strtoul(*av, NULL, 0));
4312                         ac--; av++;
4313                         break;
4314
4315                 case TOK_IPPRECEDENCE:
4316                         NEED1("ipprecedence requires value");
4317                         fill_cmd(cmd, O_IPPRECEDENCE, 0,
4318                             (strtoul(*av, NULL, 0) & 7) << 5);
4319                         ac--; av++;
4320                         break;
4321
4322                 case TOK_IPOPTS:
4323                         NEED1("missing argument for ipoptions");
4324                         fill_flags(cmd, O_IPOPT, f_ipopts, *av);
4325                         ac--; av++;
4326                         break;
4327
4328                 case TOK_IPTOS:
4329                         NEED1("missing argument for iptos");
4330                         fill_flags(cmd, O_IPTOS, f_iptos, *av);
4331                         ac--; av++;
4332                         break;
4333
4334                 case TOK_UID:
4335                         NEED1("uid requires argument");
4336                     {
4337                         char *end;
4338                         uid_t uid;
4339                         struct passwd *pwd;
4340
4341                         cmd->opcode = O_UID;
4342                         uid = strtoul(*av, &end, 0);
4343                         pwd = (*end == '\0') ? getpwuid(uid) : getpwnam(*av);
4344                         if (pwd == NULL)
4345                                 errx(EX_DATAERR, "uid \"%s\" nonexistent", *av);
4346                         cmd32->d[0] = pwd->pw_uid;
4347                         cmd->len |= F_INSN_SIZE(ipfw_insn_u32);
4348                         ac--; av++;
4349                     }
4350                         break;
4351
4352                 case TOK_GID:
4353                         NEED1("gid requires argument");
4354                     {
4355                         char *end;
4356                         gid_t gid;
4357                         struct group *grp;
4358
4359                         cmd->opcode = O_GID;
4360                         gid = strtoul(*av, &end, 0);
4361                         grp = (*end == '\0') ? getgrgid(gid) : getgrnam(*av);
4362                         if (grp == NULL)
4363                                 errx(EX_DATAERR, "gid \"%s\" nonexistent", *av);
4364                         cmd32->d[0] = grp->gr_gid;
4365                         cmd->len |= F_INSN_SIZE(ipfw_insn_u32);
4366                         ac--; av++;
4367                     }
4368                         break;
4369
4370                 case TOK_JAIL:
4371                         NEED1("jail requires argument");
4372                     {
4373                         char *end;
4374                         int jid;
4375
4376                         cmd->opcode = O_JAIL;
4377                         jid = (int)strtol(*av, &end, 0);
4378                         if (jid < 0 || *end != '\0')
4379                                 errx(EX_DATAERR, "jail requires prison ID");
4380                         cmd32->d[0] = (uint32_t)jid;
4381                         cmd->len |= F_INSN_SIZE(ipfw_insn_u32);
4382                         ac--; av++;
4383                     }
4384                         break;
4385
4386                 case TOK_ESTAB:
4387                         fill_cmd(cmd, O_ESTAB, 0, 0);
4388                         break;
4389
4390                 case TOK_SETUP:
4391                         fill_cmd(cmd, O_TCPFLAGS, 0,
4392                                 (TH_SYN) | ( (TH_ACK) & 0xff) <<8 );
4393                         break;
4394
4395                 case TOK_TCPDATALEN:
4396                         NEED1("tcpdatalen requires length");
4397                         if (strpbrk(*av, "-,")) {
4398                             if (!add_ports(cmd, *av, 0, O_TCPDATALEN))
4399                                 errx(EX_DATAERR, "invalid tcpdata len %s", *av);
4400                         } else
4401                             fill_cmd(cmd, O_TCPDATALEN, 0,
4402                                     strtoul(*av, NULL, 0));
4403                         ac--; av++;
4404                         break;
4405
4406                 case TOK_TCPOPTS:
4407                         NEED1("missing argument for tcpoptions");
4408                         fill_flags(cmd, O_TCPOPTS, f_tcpopts, *av);
4409                         ac--; av++;
4410                         break;
4411
4412                 case TOK_TCPSEQ:
4413                 case TOK_TCPACK:
4414                         NEED1("tcpseq/tcpack requires argument");
4415                         cmd->len = F_INSN_SIZE(ipfw_insn_u32);
4416                         cmd->opcode = (i == TOK_TCPSEQ) ? O_TCPSEQ : O_TCPACK;
4417                         cmd32->d[0] = htonl(strtoul(*av, NULL, 0));
4418                         ac--; av++;
4419                         break;
4420
4421                 case TOK_TCPWIN:
4422                         NEED1("tcpwin requires length");
4423                         fill_cmd(cmd, O_TCPWIN, 0,
4424                             htons(strtoul(*av, NULL, 0)));
4425                         ac--; av++;
4426                         break;
4427
4428                 case TOK_TCPFLAGS:
4429                         NEED1("missing argument for tcpflags");
4430                         cmd->opcode = O_TCPFLAGS;
4431                         fill_flags(cmd, O_TCPFLAGS, f_tcpflags, *av);
4432                         ac--; av++;
4433                         break;
4434
4435                 case TOK_KEEPSTATE:
4436                         if (open_par)
4437                                 errx(EX_USAGE, "keep-state cannot be part "
4438                                     "of an or block");
4439                         if (have_state)
4440                                 errx(EX_USAGE, "only one of keep-state "
4441                                         "and limit is allowed");
4442                         have_state = cmd;
4443                         fill_cmd(cmd, O_KEEP_STATE, 0, 0);
4444                         break;
4445
4446                 case TOK_LIMIT:
4447                         if (open_par)
4448                                 errx(EX_USAGE, "limit cannot be part "
4449                                     "of an or block");
4450                         if (have_state)
4451                                 errx(EX_USAGE, "only one of keep-state "
4452                                         "and limit is allowed");
4453                         NEED1("limit needs mask and # of connections");
4454                         have_state = cmd;
4455                     {
4456                         ipfw_insn_limit *c = (ipfw_insn_limit *)cmd;
4457
4458                         cmd->len = F_INSN_SIZE(ipfw_insn_limit);
4459                         cmd->opcode = O_LIMIT;
4460                         c->limit_mask = 0;
4461                         c->conn_limit = 0;
4462                         for (; ac >1 ;) {
4463                                 int val;
4464
4465                                 val = match_token(limit_masks, *av);
4466                                 if (val <= 0)
4467                                         break;
4468                                 c->limit_mask |= val;
4469                                 ac--; av++;
4470                         }
4471                         c->conn_limit = atoi(*av);
4472                         if (c->conn_limit == 0)
4473                                 errx(EX_USAGE, "limit: limit must be >0");
4474                         if (c->limit_mask == 0)
4475                                 errx(EX_USAGE, "missing limit mask");
4476                         ac--; av++;
4477                     }
4478                         break;
4479
4480                 case TOK_PROTO:
4481                         NEED1("missing protocol");
4482                         if (add_proto(cmd, *av, &proto)) {
4483                                 ac--; av++;
4484                         } else
4485                                 errx(EX_DATAERR, "invalid protocol ``%s''",
4486                                     *av);
4487                         break;
4488
4489                 case TOK_SRCIP:
4490                         NEED1("missing source IP");
4491                         if (add_srcip(cmd, *av)) {
4492                                 ac--; av++;
4493                         }
4494                         break;
4495
4496                 case TOK_DSTIP:
4497                         NEED1("missing destination IP");
4498                         if (add_dstip(cmd, *av)) {
4499                                 ac--; av++;
4500                         }
4501                         break;
4502
4503                 case TOK_SRCIP6:
4504                         NEED1("missing source IP6");
4505                         if (add_srcip6(cmd, *av)) {
4506                                 ac--; av++;
4507                         }
4508                         break;
4509
4510                 case TOK_DSTIP6:
4511                         NEED1("missing destination IP6");
4512                         if (add_dstip6(cmd, *av)) {
4513                                 ac--; av++;
4514                         }
4515                         break;
4516
4517                 case TOK_SRCPORT:
4518                         NEED1("missing source port");
4519                         if (_substrcmp(*av, "any") == 0 ||
4520                             add_ports(cmd, *av, proto, O_IP_SRCPORT)) {
4521                                 ac--; av++;
4522                         } else
4523                                 errx(EX_DATAERR, "invalid source port %s", *av);
4524                         break;
4525
4526                 case TOK_DSTPORT:
4527                         NEED1("missing destination port");
4528                         if (_substrcmp(*av, "any") == 0 ||
4529                             add_ports(cmd, *av, proto, O_IP_DSTPORT)) {
4530                                 ac--; av++;
4531                         } else
4532                                 errx(EX_DATAERR, "invalid destination port %s",
4533                                     *av);
4534                         break;
4535
4536                 case TOK_MAC:
4537                         if (add_mac(cmd, ac, av)) {
4538                                 ac -= 2; av += 2;
4539                         }
4540                         break;
4541
4542                 case TOK_MACTYPE:
4543                         NEED1("missing mac type");
4544                         if (!add_mactype(cmd, ac, *av))
4545                                 errx(EX_DATAERR, "invalid mac type %s", *av);
4546                         ac--; av++;
4547                         break;
4548
4549                 case TOK_VERREVPATH:
4550                         fill_cmd(cmd, O_VERREVPATH, 0, 0);
4551                         break;
4552
4553                 case TOK_VERSRCREACH:
4554                         fill_cmd(cmd, O_VERSRCREACH, 0, 0);
4555                         break;
4556
4557                 case TOK_ANTISPOOF:
4558                         fill_cmd(cmd, O_ANTISPOOF, 0, 0);
4559                         break;
4560
4561                 case TOK_IPSEC:
4562                         fill_cmd(cmd, O_IPSEC, 0, 0);
4563                         break;
4564
4565                 case TOK_IPV6:
4566                         fill_cmd(cmd, O_IP6, 0, 0);
4567                         break;
4568
4569                 case TOK_IPV4:
4570                         fill_cmd(cmd, O_IP4, 0, 0);
4571                         break;
4572
4573                 case TOK_EXT6HDR:
4574                         fill_ext6hdr( cmd, *av );
4575                         ac--; av++;
4576                         break;
4577
4578                 case TOK_FLOWID:
4579                         if (proto != IPPROTO_IPV6 )
4580                                 errx( EX_USAGE, "flow-id filter is active "
4581                                     "only for ipv6 protocol\n");
4582                         fill_flow6( (ipfw_insn_u32 *) cmd, *av );
4583                         ac--; av++;
4584                         break;
4585
4586                 case TOK_COMMENT:
4587                         fill_comment(cmd, ac, av);
4588                         av += ac;
4589                         ac = 0;
4590                         break;
4591
4592                 default:
4593                         errx(EX_USAGE, "unrecognised option [%d] %s\n", i, s);
4594                 }
4595                 if (F_LEN(cmd) > 0) {   /* prepare to advance */
4596                         prev = cmd;
4597                         cmd = next_cmd(cmd);
4598                 }
4599         }
4600
4601 done:
4602         /*
4603          * Now copy stuff into the rule.
4604          * If we have a keep-state option, the first instruction
4605          * must be a PROBE_STATE (which is generated here).
4606          * If we have a LOG option, it was stored as the first command,
4607          * and now must be moved to the top of the action part.
4608          */
4609         dst = (ipfw_insn *)rule->cmd;
4610
4611         /*
4612          * First thing to write into the command stream is the match probability.
4613          */
4614         if (match_prob != 1) { /* 1 means always match */
4615                 dst->opcode = O_PROB;
4616                 dst->len = 2;
4617                 *((int32_t *)(dst+1)) = (int32_t)(match_prob * 0x7fffffff);
4618                 dst += dst->len;
4619         }
4620
4621         /*
4622          * generate O_PROBE_STATE if necessary
4623          */
4624         if (have_state && have_state->opcode != O_CHECK_STATE) {
4625                 fill_cmd(dst, O_PROBE_STATE, 0, 0);
4626                 dst = next_cmd(dst);
4627         }
4628         /*
4629          * copy all commands but O_LOG, O_KEEP_STATE, O_LIMIT, O_ALTQ
4630          */
4631         for (src = (ipfw_insn *)cmdbuf; src != cmd; src += i) {
4632                 i = F_LEN(src);
4633
4634                 switch (src->opcode) {
4635                 case O_LOG:
4636                 case O_KEEP_STATE:
4637                 case O_LIMIT:
4638                 case O_ALTQ:
4639                         break;
4640                 default:
4641                         bcopy(src, dst, i * sizeof(uint32_t));
4642                         dst += i;
4643                 }
4644         }
4645
4646         /*
4647          * put back the have_state command as last opcode
4648          */
4649         if (have_state && have_state->opcode != O_CHECK_STATE) {
4650                 i = F_LEN(have_state);
4651                 bcopy(have_state, dst, i * sizeof(uint32_t));
4652                 dst += i;
4653         }
4654         /*
4655          * start action section
4656          */
4657         rule->act_ofs = dst - rule->cmd;
4658
4659         /*
4660          * put back O_LOG, O_ALTQ if necessary
4661          */
4662         if (have_log) {
4663                 i = F_LEN(have_log);
4664                 bcopy(have_log, dst, i * sizeof(uint32_t));
4665                 dst += i;
4666         }
4667         if (have_altq) {
4668                 i = F_LEN(have_altq);
4669                 bcopy(have_altq, dst, i * sizeof(uint32_t));
4670                 dst += i;
4671         }
4672         /*
4673          * copy all other actions
4674          */
4675         for (src = (ipfw_insn *)actbuf; src != action; src += i) {
4676                 i = F_LEN(src);
4677                 bcopy(src, dst, i * sizeof(uint32_t));
4678                 dst += i;
4679         }
4680
4681         rule->cmd_len = (uint32_t *)dst - (uint32_t *)(rule->cmd);
4682         i = (char *)dst - (char *)rule;
4683         if (do_cmd(IP_FW_ADD, rule, (uintptr_t)&i) == -1)
4684                 err(EX_UNAVAILABLE, "getsockopt(%s)", "IP_FW_ADD");
4685         if (!do_quiet)
4686                 show_ipfw(rule, 0, 0);
4687 }
4688
4689 static void
4690 zero(int ac, char *av[], int optname /* IP_FW_ZERO or IP_FW_RESETLOG */)
4691 {
4692         int rulenum;
4693         int failed = EX_OK;
4694         char const *name = optname == IP_FW_ZERO ?  "ZERO" : "RESETLOG";
4695
4696         av++; ac--;
4697
4698         if (!ac) {
4699                 /* clear all entries */
4700                 if (do_cmd(optname, NULL, 0) < 0)
4701                         err(EX_UNAVAILABLE, "setsockopt(IP_FW_%s)", name);
4702                 if (!do_quiet)
4703                         printf("%s.\n", optname == IP_FW_ZERO ?
4704                             "Accounting cleared":"Logging counts reset");
4705
4706                 return;
4707         }
4708
4709         while (ac) {
4710                 /* Rule number */
4711                 if (isdigit(**av)) {
4712                         rulenum = atoi(*av);
4713                         av++;
4714                         ac--;
4715                         if (do_cmd(optname, &rulenum, sizeof rulenum)) {
4716                                 warn("rule %u: setsockopt(IP_FW_%s)",
4717                                     rulenum, name);
4718                                 failed = EX_UNAVAILABLE;
4719                         } else if (!do_quiet)
4720                                 printf("Entry %d %s.\n", rulenum,
4721                                     optname == IP_FW_ZERO ?
4722                                         "cleared" : "logging count reset");
4723                 } else {
4724                         errx(EX_USAGE, "invalid rule number ``%s''", *av);
4725                 }
4726         }
4727         if (failed != EX_OK)
4728                 exit(failed);
4729 }
4730
4731 static void
4732 flush(int force)
4733 {
4734         int cmd = do_pipe ? IP_DUMMYNET_FLUSH : IP_FW_FLUSH;
4735
4736         if (!force && !do_quiet) { /* need to ask user */
4737                 int c;
4738
4739                 printf("Are you sure? [yn] ");
4740                 fflush(stdout);
4741                 do {
4742                         c = toupper(getc(stdin));
4743                         while (c != '\n' && getc(stdin) != '\n')
4744                                 if (feof(stdin))
4745                                         return; /* and do not flush */
4746                 } while (c != 'Y' && c != 'N');
4747                 printf("\n");
4748                 if (c == 'N')   /* user said no */
4749                         return;
4750         }
4751         if (do_cmd(cmd, NULL, 0) < 0)
4752                 err(EX_UNAVAILABLE, "setsockopt(IP_%s_FLUSH)",
4753                     do_pipe ? "DUMMYNET" : "FW");
4754         if (!do_quiet)
4755                 printf("Flushed all %s.\n", do_pipe ? "pipes" : "rules");
4756 }
4757
4758 /*
4759  * Free a the (locally allocated) copy of command line arguments.
4760  */
4761 static void
4762 free_args(int ac, char **av)
4763 {
4764         int i;
4765
4766         for (i=0; i < ac; i++)
4767                 free(av[i]);
4768         free(av);
4769 }
4770
4771 /*
4772  * This one handles all table-related commands
4773  *      ipfw table N add addr[/masklen] [value]
4774  *      ipfw table N delete addr[/masklen]
4775  *      ipfw table N flush
4776  *      ipfw table N list
4777  */
4778 static void
4779 table_handler(int ac, char *av[])
4780 {
4781         ipfw_table_entry ent;
4782         ipfw_table *tbl;
4783         int do_add;
4784         char *p;
4785         socklen_t l;
4786         uint32_t a;
4787
4788         ac--; av++;
4789         if (ac && isdigit(**av)) {
4790                 ent.tbl = atoi(*av);
4791                 ac--; av++;
4792         } else
4793                 errx(EX_USAGE, "table number required");
4794         NEED1("table needs command");
4795         if (_substrcmp(*av, "add") == 0 ||
4796             _substrcmp(*av, "delete") == 0) {
4797                 do_add = **av == 'a';
4798                 ac--; av++;
4799                 if (!ac)
4800                         errx(EX_USAGE, "IP address required");
4801                 p = strchr(*av, '/');
4802                 if (p) {
4803                         *p++ = '\0';
4804                         ent.masklen = atoi(p);
4805                         if (ent.masklen > 32)
4806                                 errx(EX_DATAERR, "bad width ``%s''", p);
4807                 } else
4808                         ent.masklen = 32;
4809                 if (lookup_host(*av, (struct in_addr *)&ent.addr) != 0)
4810                         errx(EX_NOHOST, "hostname ``%s'' unknown", *av);
4811                 ac--; av++;
4812                 if (do_add && ac)
4813                         ent.value = strtoul(*av, NULL, 0);
4814                 else
4815                         ent.value = 0;
4816                 if (do_cmd(do_add ? IP_FW_TABLE_ADD : IP_FW_TABLE_DEL,
4817                     &ent, sizeof(ent)) < 0)
4818                         /* If running silent, don't bomb out on these errors. */
4819                         if (!(do_quiet && (errno == (do_add ? EEXIST : ESRCH))))
4820                                 err(EX_OSERR, "setsockopt(IP_FW_TABLE_%s)",
4821                                     do_add ? "ADD" : "DEL");
4822                         /* In silent mode, react to a failed add by deleting */
4823                         if (do_add)
4824                                 do_cmd(IP_FW_TABLE_DEL, &ent, sizeof(ent));
4825                                 if (do_cmd(IP_FW_TABLE_ADD,
4826                                     &ent, sizeof(ent)) < 0)
4827                                         err(EX_OSERR,
4828                                             "setsockopt(IP_FW_TABLE_ADD)");
4829         } else if (_substrcmp(*av, "flush") == 0) {
4830                 if (do_cmd(IP_FW_TABLE_FLUSH, &ent.tbl, sizeof(ent.tbl)) < 0)
4831                         err(EX_OSERR, "setsockopt(IP_FW_TABLE_FLUSH)");
4832         } else if (_substrcmp(*av, "list") == 0) {
4833                 a = ent.tbl;
4834                 l = sizeof(a);
4835                 if (do_cmd(IP_FW_TABLE_GETSIZE, &a, (uintptr_t)&l) < 0)
4836                         err(EX_OSERR, "getsockopt(IP_FW_TABLE_GETSIZE)");
4837                 l = sizeof(*tbl) + a * sizeof(ipfw_table_entry);
4838                 tbl = malloc(l);
4839                 if (tbl == NULL)
4840                         err(EX_OSERR, "malloc");
4841                 tbl->tbl = ent.tbl;
4842                 if (do_cmd(IP_FW_TABLE_LIST, tbl, (uintptr_t)&l) < 0)
4843                         err(EX_OSERR, "getsockopt(IP_FW_TABLE_LIST)");
4844                 for (a = 0; a < tbl->cnt; a++) {
4845                         printf("%s/%u %u\n",
4846                             inet_ntoa(*(struct in_addr *)&tbl->ent[a].addr),
4847                             tbl->ent[a].masklen, tbl->ent[a].value);
4848                 }
4849         } else
4850                 errx(EX_USAGE, "invalid table command %s", *av);
4851 }
4852
4853 /*
4854  * Called with the arguments (excluding program name).
4855  * Returns 0 if successful, 1 if empty command, errx() in case of errors.
4856  */
4857 static int
4858 ipfw_main(int oldac, char **oldav)
4859 {
4860         int ch, ac, save_ac;
4861         char **av, **save_av;
4862         int do_acct = 0;                /* Show packet/byte count */
4863
4864 #define WHITESP         " \t\f\v\n\r"
4865         if (oldac == 0)
4866                 return 1;
4867         else if (oldac == 1) {
4868                 /*
4869                  * If we are called with a single string, try to split it into
4870                  * arguments for subsequent parsing.
4871                  * But first, remove spaces after a ',', by copying the string
4872                  * in-place.
4873                  */
4874                 char *arg = oldav[0];   /* The string... */
4875                 int l = strlen(arg);
4876                 int copy = 0;           /* 1 if we need to copy, 0 otherwise */
4877                 int i, j;
4878                 for (i = j = 0; i < l; i++) {
4879                         if (arg[i] == '#')      /* comment marker */
4880                                 break;
4881                         if (copy) {
4882                                 arg[j++] = arg[i];
4883                                 copy = !index("," WHITESP, arg[i]);
4884                         } else {
4885                                 copy = !index(WHITESP, arg[i]);
4886                                 if (copy)
4887                                         arg[j++] = arg[i];
4888                         }
4889                 }
4890                 if (!copy && j > 0)     /* last char was a 'blank', remove it */
4891                         j--;
4892                 l = j;                  /* the new argument length */
4893                 arg[j++] = '\0';
4894                 if (l == 0)             /* empty string! */
4895                         return 1;
4896
4897                 /*
4898                  * First, count number of arguments. Because of the previous
4899                  * processing, this is just the number of blanks plus 1.
4900                  */
4901                 for (i = 0, ac = 1; i < l; i++)
4902                         if (index(WHITESP, arg[i]) != NULL)
4903                                 ac++;
4904
4905                 av = calloc(ac, sizeof(char *));
4906
4907                 /*
4908                  * Second, copy arguments from cmd[] to av[]. For each one,
4909                  * j is the initial character, i is the one past the end.
4910                  */
4911                 for (ac = 0, i = j = 0; i < l; i++)
4912                         if (index(WHITESP, arg[i]) != NULL || i == l-1) {
4913                                 if (i == l-1)
4914                                         i++;
4915                                 av[ac] = calloc(i-j+1, 1);
4916                                 bcopy(arg+j, av[ac], i-j);
4917                                 ac++;
4918                                 j = i + 1;
4919                         }
4920         } else {
4921                 /*
4922                  * If an argument ends with ',' join with the next one.
4923                  */
4924                 int first, i, l;
4925
4926                 av = calloc(oldac, sizeof(char *));
4927                 for (first = i = ac = 0, l = 0; i < oldac; i++) {
4928                         char *arg = oldav[i];
4929                         int k = strlen(arg);
4930
4931                         l += k;
4932                         if (arg[k-1] != ',' || i == oldac-1) {
4933                                 /* Time to copy. */
4934                                 av[ac] = calloc(l+1, 1);
4935                                 for (l=0; first <= i; first++) {
4936                                         strcat(av[ac]+l, oldav[first]);
4937                                         l += strlen(oldav[first]);
4938                                 }
4939                                 ac++;
4940                                 l = 0;
4941                                 first = i+1;
4942                         }
4943                 }
4944         }
4945
4946         /* Set the force flag for non-interactive processes */
4947         if (!do_force)
4948                 do_force = !isatty(STDIN_FILENO);
4949
4950         /* Save arguments for final freeing of memory. */
4951         save_ac = ac;
4952         save_av = av;
4953
4954         optind = optreset = 0;
4955         while ((ch = getopt(ac, av, "abcdefhnNqs:STtv")) != -1)
4956                 switch (ch) {
4957                 case 'a':
4958                         do_acct = 1;
4959                         break;
4960
4961                 case 'b':
4962                         comment_only = 1;
4963                         do_compact = 1;
4964                         break;
4965
4966                 case 'c':
4967                         do_compact = 1;
4968                         break;
4969
4970                 case 'd':
4971                         do_dynamic = 1;
4972                         break;
4973
4974                 case 'e':
4975                         do_expired = 1;
4976                         break;
4977
4978                 case 'f':
4979                         do_force = 1;
4980                         break;
4981
4982                 case 'h': /* help */
4983                         free_args(save_ac, save_av);
4984                         help();
4985                         break;  /* NOTREACHED */
4986
4987                 case 'n':
4988                         test_only = 1;
4989                         break;
4990
4991                 case 'N':
4992                         do_resolv = 1;
4993                         break;
4994
4995                 case 'q':
4996                         do_quiet = 1;
4997                         break;
4998
4999                 case 's': /* sort */
5000                         do_sort = atoi(optarg);
5001                         break;
5002
5003                 case 'S':
5004                         show_sets = 1;
5005                         break;
5006
5007                 case 't':
5008                         do_time = 1;
5009                         break;
5010
5011                 case 'T':
5012                         do_time = 2;    /* numeric timestamp */
5013                         break;
5014
5015                 case 'v': /* verbose */
5016                         verbose = 1;
5017                         break;
5018
5019                 default:
5020                         free_args(save_ac, save_av);
5021                         return 1;
5022                 }
5023
5024         ac -= optind;
5025         av += optind;
5026         NEED1("bad arguments, for usage summary ``ipfw''");
5027
5028         /*
5029          * An undocumented behaviour of ipfw1 was to allow rule numbers first,
5030          * e.g. "100 add allow ..." instead of "add 100 allow ...".
5031          * In case, swap first and second argument to get the normal form.
5032          */
5033         if (ac > 1 && isdigit(*av[0])) {
5034                 char *p = av[0];
5035
5036                 av[0] = av[1];
5037                 av[1] = p;
5038         }
5039
5040         /*
5041          * optional: pipe or queue
5042          */
5043         do_pipe = 0;
5044         if (_substrcmp(*av, "pipe") == 0)
5045                 do_pipe = 1;
5046         else if (_substrcmp(*av, "queue") == 0)
5047                 do_pipe = 2;
5048         if (do_pipe) {
5049                 ac--;
5050                 av++;
5051         }
5052         NEED1("missing command");
5053
5054         /*
5055          * For pipes and queues we normally say 'pipe NN config'
5056          * but the code is easier to parse as 'pipe config NN'
5057          * so we swap the two arguments.
5058          */
5059         if (do_pipe > 0 && ac > 1 && isdigit(*av[0])) {
5060                 char *p = av[0];
5061
5062                 av[0] = av[1];
5063                 av[1] = p;
5064         }
5065
5066         if (_substrcmp(*av, "add") == 0)
5067                 add(ac, av);
5068         else if (do_pipe && _substrcmp(*av, "config") == 0)
5069                 config_pipe(ac, av);
5070         else if (_substrcmp(*av, "delete") == 0)
5071                 delete(ac, av);
5072         else if (_substrcmp(*av, "flush") == 0)
5073                 flush(do_force);
5074         else if (_substrcmp(*av, "zero") == 0)
5075                 zero(ac, av, IP_FW_ZERO);
5076         else if (_substrcmp(*av, "resetlog") == 0)
5077                 zero(ac, av, IP_FW_RESETLOG);
5078         else if (_substrcmp(*av, "print") == 0 ||
5079                  _substrcmp(*av, "list") == 0)
5080                 list(ac, av, do_acct);
5081         else if (_substrcmp(*av, "set") == 0)
5082                 sets_handler(ac, av);
5083         else if (_substrcmp(*av, "table") == 0)
5084                 table_handler(ac, av);
5085         else if (_substrcmp(*av, "enable") == 0)
5086                 sysctl_handler(ac, av, 1);
5087         else if (_substrcmp(*av, "disable") == 0)
5088                 sysctl_handler(ac, av, 0);
5089         else if (_substrcmp(*av, "show") == 0)
5090                 list(ac, av, 1 /* show counters */);
5091         else
5092                 errx(EX_USAGE, "bad command `%s'", *av);
5093
5094         /* Free memory allocated in the argument parsing. */
5095         free_args(save_ac, save_av);
5096         return 0;
5097 }
5098
5099
5100 static void
5101 ipfw_readfile(int ac, char *av[])
5102 {
5103 #define MAX_ARGS        32
5104         char    buf[BUFSIZ];
5105         char    *cmd = NULL, *filename = av[ac-1];
5106         int     c, lineno=0;
5107         FILE    *f = NULL;
5108         pid_t   preproc = 0;
5109
5110         filename = av[ac-1];
5111
5112         while ((c = getopt(ac, av, "cfNnp:qS")) != -1) {
5113                 switch(c) {
5114                 case 'c':
5115                         do_compact = 1;
5116                         break;
5117
5118                 case 'f':
5119                         do_force = 1;
5120                         break;
5121
5122                 case 'N':
5123                         do_resolv = 1;
5124                         break;
5125
5126                 case 'n':
5127                         test_only = 1;
5128                         break;
5129
5130                 case 'p':
5131                         cmd = optarg;
5132                         /*
5133                          * Skip previous args and delete last one, so we
5134                          * pass all but the last argument to the preprocessor
5135                          * via av[optind-1]
5136                          */
5137                         av += optind - 1;
5138                         ac -= optind - 1;
5139                         av[ac-1] = NULL;
5140                         fprintf(stderr, "command is %s\n", av[0]);
5141                         break;
5142
5143                 case 'q':
5144                         do_quiet = 1;
5145                         break;
5146
5147                 case 'S':
5148                         show_sets = 1;
5149                         break;
5150
5151                 default:
5152                         errx(EX_USAGE, "bad arguments, for usage"
5153                              " summary ``ipfw''");
5154                 }
5155
5156                 if (cmd != NULL)
5157                         break;
5158         }
5159
5160         if (cmd == NULL && ac != optind + 1) {
5161                 fprintf(stderr, "ac %d, optind %d\n", ac, optind);
5162                 errx(EX_USAGE, "extraneous filename arguments");
5163         }
5164
5165         if ((f = fopen(filename, "r")) == NULL)
5166                 err(EX_UNAVAILABLE, "fopen: %s", filename);
5167
5168         if (cmd != NULL) {                      /* pipe through preprocessor */
5169                 int pipedes[2];
5170
5171                 if (pipe(pipedes) == -1)
5172                         err(EX_OSERR, "cannot create pipe");
5173
5174                 preproc = fork();
5175                 if (preproc == -1)
5176                         err(EX_OSERR, "cannot fork");
5177
5178                 if (preproc == 0) {
5179                         /*
5180                          * Child, will run the preprocessor with the
5181                          * file on stdin and the pipe on stdout.
5182                          */
5183                         if (dup2(fileno(f), 0) == -1
5184                             || dup2(pipedes[1], 1) == -1)
5185                                 err(EX_OSERR, "dup2()");
5186                         fclose(f);
5187                         close(pipedes[1]);
5188                         close(pipedes[0]);
5189                         execvp(cmd, av);
5190                         err(EX_OSERR, "execvp(%s) failed", cmd);
5191                 } else { /* parent, will reopen f as the pipe */
5192                         fclose(f);
5193                         close(pipedes[1]);
5194                         if ((f = fdopen(pipedes[0], "r")) == NULL) {
5195                                 int savederrno = errno;
5196
5197                                 (void)kill(preproc, SIGTERM);
5198                                 errno = savederrno;
5199                                 err(EX_OSERR, "fdopen()");
5200                         }
5201                 }
5202         }
5203
5204         while (fgets(buf, BUFSIZ, f)) {         /* read commands */
5205                 char linename[10];
5206                 char *args[1];
5207
5208                 lineno++;
5209                 sprintf(linename, "Line %d", lineno);
5210                 setprogname(linename); /* XXX */
5211                 args[0] = buf;
5212                 ipfw_main(1, args);
5213         }
5214         fclose(f);
5215         if (cmd != NULL) {
5216                 int status;
5217
5218                 if (waitpid(preproc, &status, 0) == -1)
5219                         errx(EX_OSERR, "waitpid()");
5220                 if (WIFEXITED(status) && WEXITSTATUS(status) != EX_OK)
5221                         errx(EX_UNAVAILABLE,
5222                             "preprocessor exited with status %d",
5223                             WEXITSTATUS(status));
5224                 else if (WIFSIGNALED(status))
5225                         errx(EX_UNAVAILABLE,
5226                             "preprocessor exited with signal %d",
5227                             WTERMSIG(status));
5228         }
5229 }
5230
5231 int
5232 main(int ac, char *av[])
5233 {
5234         /*
5235          * If the last argument is an absolute pathname, interpret it
5236          * as a file to be preprocessed.
5237          */
5238
5239         if (ac > 1 && av[ac - 1][0] == '/' && access(av[ac - 1], R_OK) == 0)
5240                 ipfw_readfile(ac, av);
5241         else {
5242                 if (ipfw_main(ac-1, av+1))
5243                         show_usage();
5244         }
5245         return EX_OK;
5246 }