sbin/ipfw/ipfw2.c

   1 /*
   2  * Copyright (c) 2002 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: src/sbin/ipfw/ipfw2.c,v 1.4.2.13 2003/05/27 22:21:11 gshapiro Exp $
  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
  31 #include <ctype.h>
  32 #include <err.h>
  33 #include <errno.h>
  34 #include <grp.h>
  35 #include <limits.h>
  36 #include <netdb.h>
  37 #include <pwd.h>
  38 #include <signal.h>
  39 #include <stdio.h>
  40 #include <stdlib.h>
  41 #include <stdarg.h>
  42 #include <string.h>
  43 #include <timeconv.h>
  44 #include <unistd.h>
  45 #include <sysexits.h>
  46
  47 #include <net/if.h>
  48 #include <netinet/in.h>
  49 #include <netinet/in_systm.h>
  50 #include <netinet/ip.h>
  51 #include <netinet/ip_icmp.h>
  52 #include <net/ipfw/ip_fw.h>
  53 #include <net/route.h> /* def. of struct route */
  54 #include <net/ethernet.h>
  55 #include <net/dummynet/ip_dummynet.h>
  56 #include <netinet/tcp.h>
  57 #include <arpa/inet.h>
  58
  59 int             s,                      /* main RAW socket */
  60                 do_resolv,              /* Would try to resolve all */
  61                 do_acct,                /* Show packet/byte count */
  62                 do_time,                /* Show time stamps */
  63                 do_quiet,               /* Be quiet in add and flush */
  64                 do_force,               /* Don't ask for confirmation */
  65                 do_pipe,                /* this cmd refers to a pipe */
  66                 do_sort,                /* field to sort results (0 = no) */
  67                 do_dynamic,             /* display dynamic rules */
  68                 do_expired,             /* display expired dynamic rules */
  69                 do_compact,             /* show rules in compact mode */
  70                 show_sets,              /* display rule sets */
  71                 verbose;
  72
  73 #define IP_MASK_ALL     0xffffffff
  74
  75 /*
  76  * structure to hold flag names and associated values to be
  77  * set in the appropriate masks.
  78  * A NULL string terminates the array.
  79  * Often, an element with 0 value contains an error string.
  80  *
  81  */
  82 struct _s_x {
  83         char *s;
  84         int x;
  85 };
  86
  87 static struct _s_x f_tcpflags[] = {
  88         { "syn", TH_SYN },
  89         { "fin", TH_FIN },
  90         { "ack", TH_ACK },
  91         { "psh", TH_PUSH },
  92         { "rst", TH_RST },
  93         { "urg", TH_URG },
  94         { "tcp flag", 0 },
  95         { NULL, 0 }
  96 };
  97
  98 static struct _s_x f_tcpopts[] = {
  99         { "mss",        IP_FW_TCPOPT_MSS },
 100         { "maxseg",     IP_FW_TCPOPT_MSS },
 101         { "window",     IP_FW_TCPOPT_WINDOW },
 102         { "sack",       IP_FW_TCPOPT_SACK },
 103         { "ts",         IP_FW_TCPOPT_TS },
 104         { "timestamp",  IP_FW_TCPOPT_TS },
 105         { "cc",         IP_FW_TCPOPT_CC },
 106         { "tcp option", 0 },
 107         { NULL, 0 }
 108 };
 109
 110 /*
 111  * IP options span the range 0 to 255 so we need to remap them
 112  * (though in fact only the low 5 bits are significant).
 113  */
 114 static struct _s_x f_ipopts[] = {
 115         { "ssrr",       IP_FW_IPOPT_SSRR},
 116         { "lsrr",       IP_FW_IPOPT_LSRR},
 117         { "rr",         IP_FW_IPOPT_RR},
 118         { "ts",         IP_FW_IPOPT_TS},
 119         { "ip option",  0 },
 120         { NULL, 0 }
 121 };
 122
 123 static struct _s_x f_iptos[] = {
 124         { "lowdelay",   IPTOS_LOWDELAY},
 125         { "throughput", IPTOS_THROUGHPUT},
 126         { "reliability", IPTOS_RELIABILITY},
 127         { "mincost",    IPTOS_MINCOST},
 128         { "congestion", IPTOS_CE},
 129         { "ecntransport", IPTOS_ECT},
 130         { "ip tos option", 0},
 131         { NULL, 0 }
 132 };
 133
 134 static struct _s_x limit_masks[] = {
 135         {"all",         DYN_SRC_ADDR|DYN_SRC_PORT|DYN_DST_ADDR|DYN_DST_PORT},
 136         {"src-addr",    DYN_SRC_ADDR},
 137         {"src-port",    DYN_SRC_PORT},
 138         {"dst-addr",    DYN_DST_ADDR},
 139         {"dst-port",    DYN_DST_PORT},
 140         {NULL,          0}
 141 };
 142
 143 /*
 144  * we use IPPROTO_ETHERTYPE as a fake protocol id to call the print routines
 145  * This is only used in this code.
 146  */
 147 #define IPPROTO_ETHERTYPE       0x1000
 148 static struct _s_x ether_types[] = {
 149     /*
 150      * Note, we cannot use "-:&/" in the names because they are field
 151      * separators in the type specifications. Also, we use s = NULL as
 152      * end-delimiter, because a type of 0 can be legal.
 153      */
 154         { "ip",         0x0800 },
 155         { "ipv4",       0x0800 },
 156         { "ipv6",       0x86dd },
 157         { "arp",        0x0806 },
 158         { "rarp",       0x8035 },
 159         { "vlan",       0x8100 },
 160         { "loop",       0x9000 },
 161         { "trail",      0x1000 },
 162         { "pppoe_disc", 0x8863 },
 163         { "pppoe_sess", 0x8864 },
 164         { "ipx_8022",   0x00E0 },
 165         { "ipx_8023",   0x0000 },
 166         { "ipx_ii",     0x8137 },
 167         { "ipx_snap",   0x8137 },
 168         { "ipx",        0x8137 },
 169         { "ns",         0x0600 },
 170         { NULL,         0 }
 171 };
 172
 173 static void show_usage(void);
 174
 175 enum tokens {
 176         TOK_NULL=0,
 177
 178         TOK_OR,
 179         TOK_NOT,
 180         TOK_STARTBRACE,
 181         TOK_ENDBRACE,
 182
 183         TOK_ACCEPT,
 184         TOK_COUNT,
 185         TOK_PIPE,
 186         TOK_QUEUE,
 187         TOK_DIVERT,
 188         TOK_TEE,
 189         TOK_FORWARD,
 190         TOK_SKIPTO,
 191         TOK_DENY,
 192         TOK_REJECT,
 193         TOK_RESET,
 194         TOK_UNREACH,
 195         TOK_CHECKSTATE,
 196
 197         TOK_UID,
 198         TOK_GID,
 199         TOK_IN,
 200         TOK_LIMIT,
 201         TOK_KEEPSTATE,
 202         TOK_LAYER2,
 203         TOK_OUT,
 204         TOK_XMIT,
 205         TOK_RECV,
 206         TOK_VIA,
 207         TOK_FRAG,
 208         TOK_IPOPTS,
 209         TOK_IPLEN,
 210         TOK_IPID,
 211         TOK_IPPRECEDENCE,
 212         TOK_IPTOS,
 213         TOK_IPTTL,
 214         TOK_IPVER,
 215         TOK_ESTAB,
 216         TOK_SETUP,
 217         TOK_TCPFLAGS,
 218         TOK_TCPOPTS,
 219         TOK_TCPSEQ,
 220         TOK_TCPACK,
 221         TOK_TCPWIN,
 222         TOK_ICMPTYPES,
 223         TOK_MAC,
 224         TOK_MACTYPE,
 225
 226         TOK_PLR,
 227         TOK_NOERROR,
 228         TOK_BUCKETS,
 229         TOK_DSTIP,
 230         TOK_SRCIP,
 231         TOK_DSTPORT,
 232         TOK_SRCPORT,
 233         TOK_ALL,
 234         TOK_MASK,
 235         TOK_BW,
 236         TOK_DELAY,
 237         TOK_RED,
 238         TOK_GRED,
 239         TOK_DROPTAIL,
 240         TOK_PROTO,
 241         TOK_WEIGHT,
 242 };
 243
 244 struct _s_x dummynet_params[] = {
 245         { "plr",                TOK_PLR },
 246         { "noerror",            TOK_NOERROR },
 247         { "buckets",            TOK_BUCKETS },
 248         { "dst-ip",             TOK_DSTIP },
 249         { "src-ip",             TOK_SRCIP },
 250         { "dst-port",           TOK_DSTPORT },
 251         { "src-port",           TOK_SRCPORT },
 252         { "proto",              TOK_PROTO },
 253         { "weight",             TOK_WEIGHT },
 254         { "all",                TOK_ALL },
 255         { "mask",               TOK_MASK },
 256         { "droptail",           TOK_DROPTAIL },
 257         { "red",                TOK_RED },
 258         { "gred",               TOK_GRED },
 259         { "bw",                 TOK_BW },
 260         { "bandwidth",          TOK_BW },
 261         { "delay",              TOK_DELAY },
 262         { "pipe",               TOK_PIPE },
 263         { "queue",              TOK_QUEUE },
 264         { "dummynet-params",    TOK_NULL },
 265         { NULL, 0 }
 266 };
 267
 268 struct _s_x rule_actions[] = {
 269         { "accept",             TOK_ACCEPT },
 270         { "pass",               TOK_ACCEPT },
 271         { "allow",              TOK_ACCEPT },
 272         { "permit",             TOK_ACCEPT },
 273         { "count",              TOK_COUNT },
 274         { "pipe",               TOK_PIPE },
 275         { "queue",              TOK_QUEUE },
 276         { "divert",             TOK_DIVERT },
 277         { "tee",                TOK_TEE },
 278         { "fwd",                TOK_FORWARD },
 279         { "forward",            TOK_FORWARD },
 280         { "skipto",             TOK_SKIPTO },
 281         { "deny",               TOK_DENY },
 282         { "drop",               TOK_DENY },
 283         { "reject",             TOK_REJECT },
 284         { "reset",              TOK_RESET },
 285         { "unreach",            TOK_UNREACH },
 286         { "check-state",        TOK_CHECKSTATE },
 287         { NULL,                 TOK_NULL },
 288         { NULL, 0 }
 289 };
 290
 291 struct _s_x rule_options[] = {
 292         { "uid",                TOK_UID },
 293         { "gid",                TOK_GID },
 294         { "in",                 TOK_IN },
 295         { "limit",              TOK_LIMIT },
 296         { "keep-state",         TOK_KEEPSTATE },
 297         { "layer2",             TOK_LAYER2 },
 298         { "out",                TOK_OUT },
 299         { "xmit",               TOK_XMIT },
 300         { "recv",               TOK_RECV },
 301         { "via",                TOK_VIA },
 302         { "fragment",           TOK_FRAG },
 303         { "frag",               TOK_FRAG },
 304         { "ipoptions",          TOK_IPOPTS },
 305         { "ipopts",             TOK_IPOPTS },
 306         { "iplen",              TOK_IPLEN },
 307         { "ipid",               TOK_IPID },
 308         { "ipprecedence",       TOK_IPPRECEDENCE },
 309         { "iptos",              TOK_IPTOS },
 310         { "ipttl",              TOK_IPTTL },
 311         { "ipversion",          TOK_IPVER },
 312         { "ipver",              TOK_IPVER },
 313         { "estab",              TOK_ESTAB },
 314         { "established",        TOK_ESTAB },
 315         { "setup",              TOK_SETUP },
 316         { "tcpflags",           TOK_TCPFLAGS },
 317         { "tcpflgs",            TOK_TCPFLAGS },
 318         { "tcpoptions",         TOK_TCPOPTS },
 319         { "tcpopts",            TOK_TCPOPTS },
 320         { "tcpseq",             TOK_TCPSEQ },
 321         { "tcpack",             TOK_TCPACK },
 322         { "tcpwin",             TOK_TCPWIN },
 323         { "icmptype",           TOK_ICMPTYPES },
 324         { "icmptypes",          TOK_ICMPTYPES },
 325         { "dst-ip",             TOK_DSTIP },
 326         { "src-ip",             TOK_SRCIP },
 327         { "dst-port",           TOK_DSTPORT },
 328         { "src-port",           TOK_SRCPORT },
 329         { "proto",              TOK_PROTO },
 330         { "MAC",                TOK_MAC },
 331         { "mac",                TOK_MAC },
 332         { "mac-type",           TOK_MACTYPE },
 333
 334         { "not",                TOK_NOT },              /* pseudo option */
 335         { "!", /* escape ? */   TOK_NOT },              /* pseudo option */
 336         { "or",                 TOK_OR },               /* pseudo option */
 337         { "|", /* escape */     TOK_OR },               /* pseudo option */
 338         { "{",                  TOK_STARTBRACE },       /* pseudo option */
 339         { "(",                  TOK_STARTBRACE },       /* pseudo option */
 340         { "}",                  TOK_ENDBRACE },         /* pseudo option */
 341         { ")",                  TOK_ENDBRACE },         /* pseudo option */
 342         { NULL,                 TOK_NULL },
 343         { NULL, 0 }
 344 };
 345
 346 /**
 347  * match_token takes a table and a string, returns the value associated
 348  * with the string (0 meaning an error in most cases)
 349  */
 350 static int
 351 match_token(struct _s_x *table, char *string)
 352 {
 353         struct _s_x *pt;
 354         int i = strlen(string);
 355
 356         for (pt = table ; i && pt->s != NULL ; pt++)
 357                 if (strlen(pt->s) == i && !bcmp(string, pt->s, i))
 358                         return pt->x;
 359         return -1;
 360 };
 361
 362 static char *
 363 match_value(struct _s_x *p, u_int32_t value)
 364 {
 365         for (; p->s != NULL; p++)
 366                 if (p->x == value)
 367                         return p->s;
 368         return NULL;
 369 }
 370
 371 /*
 372  * prints one port, symbolic or numeric
 373  */
 374 static void
 375 print_port(int proto, u_int16_t port)
 376 {
 377
 378         if (proto == IPPROTO_ETHERTYPE) {
 379                 char *s;
 380
 381                 if (do_resolv && (s = match_value(ether_types, port)) )
 382                         printf("%s", s);
 383                 else
 384                         printf("0x%04x", port);
 385         } else {
 386                 struct servent *se = NULL;
 387                 if (do_resolv) {
 388                         struct protoent *pe = getprotobynumber(proto);
 389
 390                         se = getservbyport(htons(port), pe ? pe->p_name : NULL);
 391                 }
 392                 if (se)
 393                         printf("%s", se->s_name);
 394                 else
 395                         printf("%d", port);
 396         }
 397 }
 398
 399 /*
 400  * print the values in a list of ports
 401  * XXX todo: add support for mask.
 402  */
 403 static void
 404 print_newports(ipfw_insn_u16 *cmd, int proto, int opcode)
 405 {
 406         u_int16_t *p = cmd->ports;
 407         int i;
 408         char *sep= " ";
 409
 410         if (cmd->o.len & F_NOT)
 411                 printf(" not");
 412         if (opcode != 0)
 413                 printf ("%s", opcode == O_MAC_TYPE ? " mac-type" :
 414                     (opcode == O_IP_DSTPORT ? " dst-port" : " src-port"));
 415         for (i = F_LEN((ipfw_insn *)cmd) - 1; i > 0; i--, p += 2) {
 416                 printf(sep);
 417                 print_port(proto, p[0]);
 418                 if (p[0] != p[1]) {
 419                         printf("-");
 420                         print_port(proto, p[1]);
 421                 }
 422                 sep = ",";
 423         }
 424 }
 425
 426 /*
 427  * Like strtol, but also translates service names into port numbers
 428  * for some protocols.
 429  * In particular:
 430  *      proto == -1 disables the protocol check;
 431  *      proto == IPPROTO_ETHERTYPE looks up an internal table
 432  *      proto == <some value in /etc/protocols> matches the values there.
 433  * Returns *end == s in case the parameter is not found.
 434  */
 435 static int
 436 strtoport(char *s, char **end, int base, int proto)
 437 {
 438         char *p, *buf;
 439         char *s1;
 440         int i;
 441
 442         *end = s;               /* default - not found */
 443         if ( *s == '\0')
 444                 return 0;       /* not found */
 445
 446         if (isdigit(*s))
 447                 return strtol(s, end, base);
 448
 449         /*
 450          * find separator. '\\' escapes the next char.
 451          */
 452         for (s1 = s; *s1 && (isalnum(*s1) || *s1 == '\\') ; s1++)
 453                 if (*s1 == '\\' && s1[1] != '\0')
 454                         s1++;
 455
 456         buf = malloc(s1 - s + 1);
 457         if (buf == NULL)
 458                 return 0;
 459
 460         /*
 461          * copy into a buffer skipping backslashes
 462          */
 463         for (p = s, i = 0; p != s1 ; p++)
 464                 if ( *p != '\\')
 465                         buf[i++] = *p;
 466         buf[i++] = '\0';
 467
 468         if (proto == IPPROTO_ETHERTYPE) {
 469                 i = match_token(ether_types, buf);
 470                 free(buf);
 471                 if (i != -1) {  /* found */
 472                         *end = s1;
 473                         return i;
 474                 }
 475         } else {
 476                 struct protoent *pe = NULL;
 477                 struct servent *se;
 478
 479                 if (proto != 0)
 480                         pe = getprotobynumber(proto);
 481                 setservent(1);
 482                 se = getservbyname(buf, pe ? pe->p_name : NULL);
 483                 free(buf);
 484                 if (se != NULL) {
 485                         *end = s1;
 486                         return ntohs(se->s_port);
 487                 }
 488         }
 489         return 0;       /* not found */
 490 }
 491
 492 /*
 493  * fill the body of the command with the list of port ranges.
 494  * At the moment it only understands numeric ranges.
 495  */
 496 static int
 497 fill_newports(ipfw_insn_u16 *cmd, char *av, int proto)
 498 {
 499         u_int16_t *p = cmd->ports;
 500         int i = 0;
 501         char *s = av;
 502
 503         while (*s) {
 504                 u_int16_t a, b;
 505
 506                 a = strtoport(av, &s, 0, proto);
 507                 if (s == av) /* no parameter */
 508                         break;
 509                 if (*s == '-') { /* a range */
 510                         av = s+1;
 511                         b = strtoport(av, &s, 0, proto);
 512                         if (s == av) /* no parameter */
 513                                 break;
 514                         p[0] = a;
 515                         p[1] = b;
 516                 } else if (*s == ',' || *s == '\0' ) {
 517                         p[0] = p[1] = a;
 518                 } else {        /* invalid separator */
 519                         errx(EX_DATAERR, "invalid separator <%c> in <%s>\n",
 520                                 *s, av);
 521                 }
 522                 i++;
 523                 p += 2;
 524                 av = s+1;
 525         }
 526         if (i > 0) {
 527                 if (i+1 > F_LEN_MASK)
 528                         errx(EX_DATAERR, "too many ports/ranges\n");
 529                 cmd->o.len |= i+1; /* leave F_NOT and F_OR untouched */
 530         }
 531         return i;
 532 }
 533
 534 static struct _s_x icmpcodes[] = {
 535       { "net",                  ICMP_UNREACH_NET },
 536       { "host",                 ICMP_UNREACH_HOST },
 537       { "protocol",             ICMP_UNREACH_PROTOCOL },
 538       { "port",                 ICMP_UNREACH_PORT },
 539       { "needfrag",             ICMP_UNREACH_NEEDFRAG },
 540       { "srcfail",              ICMP_UNREACH_SRCFAIL },
 541       { "net-unknown",          ICMP_UNREACH_NET_UNKNOWN },
 542       { "host-unknown",         ICMP_UNREACH_HOST_UNKNOWN },
 543       { "isolated",             ICMP_UNREACH_ISOLATED },
 544       { "net-prohib",           ICMP_UNREACH_NET_PROHIB },
 545       { "host-prohib",          ICMP_UNREACH_HOST_PROHIB },
 546       { "tosnet",               ICMP_UNREACH_TOSNET },
 547       { "toshost",              ICMP_UNREACH_TOSHOST },
 548       { "filter-prohib",        ICMP_UNREACH_FILTER_PROHIB },
 549       { "host-precedence",      ICMP_UNREACH_HOST_PRECEDENCE },
 550       { "precedence-cutoff",    ICMP_UNREACH_PRECEDENCE_CUTOFF },
 551       { NULL, 0 }
 552 };
 553
 554 static void
 555 fill_reject_code(u_short *codep, char *str)
 556 {
 557         int val;
 558         char *s;
 559
 560         val = strtoul(str, &s, 0);
 561         if (s == str || *s != '\0' || val >= 0x100)
 562                 val = match_token(icmpcodes, str);
 563         if (val < 0)
 564                 errx(EX_DATAERR, "unknown ICMP unreachable code ``%s''", str);
 565         *codep = val;
 566         return;
 567 }
 568
 569 static void
 570 print_reject_code(u_int16_t code)
 571 {
 572         char *s = match_value(icmpcodes, code);
 573
 574         if (s != NULL)
 575                 printf("unreach %s", s);
 576         else
 577                 printf("unreach %u", code);
 578 }
 579
 580 /*
 581  * Returns the number of bits set (from left) in a contiguous bitmask,
 582  * or -1 if the mask is not contiguous.
 583  * XXX this needs a proper fix.
 584  * This effectively works on masks in big-endian (network) format.
 585  * when compiled on little endian architectures.
 586  *
 587  * First bit is bit 7 of the first byte -- note, for MAC addresses,
 588  * the first bit on the wire is bit 0 of the first byte.
 589  * len is the max length in bits.
 590  */
 591 static int
 592 contigmask(u_char *p, int len)
 593 {
 594         int i, n;
 595         for (i=0; i<len ; i++)
 596                 if ( (p[i/8] & (1 << (7 - (i%8)))) == 0) /* first bit unset */
 597                         break;
 598         for (n=i+1; n < len; n++)
 599                 if ( (p[n/8] & (1 << (7 - (n%8)))) != 0)
 600                         return -1; /* mask not contiguous */
 601         return i;
 602 }
 603
 604 /*
 605  * print flags set/clear in the two bitmasks passed as parameters.
 606  * There is a specialized check for f_tcpflags.
 607  */
 608 static void
 609 print_flags(char *name, ipfw_insn *cmd, struct _s_x *list)
 610 {
 611         char *comma="";
 612         int i;
 613         u_char set = cmd->arg1 & 0xff;
 614         u_char clear = (cmd->arg1 >> 8) & 0xff;
 615
 616         if (list == f_tcpflags && set == TH_SYN && clear == TH_ACK) {
 617                 printf(" setup");
 618                 return;
 619         }
 620
 621         printf(" %s ", name);
 622         for (i=0; list[i].x != 0; i++) {
 623                 if (set & list[i].x) {
 624                         set &= ~list[i].x;
 625                         printf("%s%s", comma, list[i].s);
 626                         comma = ",";
 627                 }
 628                 if (clear & list[i].x) {
 629                         clear &= ~list[i].x;
 630                         printf("%s!%s", comma, list[i].s);
 631                         comma = ",";
 632                 }
 633         }
 634 }
 635
 636 /*
 637  * Print the ip address contained in a command.
 638  */
 639 static void
 640 print_ip(ipfw_insn_ip *cmd, char *s)
 641 {
 642         struct hostent *he = NULL;
 643         int mb;
 644
 645         printf("%s%s ", cmd->o.len & F_NOT ? " not": "", s);
 646
 647         if (cmd->o.opcode == O_IP_SRC_ME || cmd->o.opcode == O_IP_DST_ME) {
 648                 printf("me");
 649                 return;
 650         }
 651         if (cmd->o.opcode == O_IP_SRC_SET || cmd->o.opcode == O_IP_DST_SET) {
 652                 u_int32_t x, *d;
 653                 int i;
 654                 char comma = '{';
 655
 656                 x = cmd->o.arg1 - 1;
 657                 x = htonl( ~x );
 658                 cmd->addr.s_addr = htonl(cmd->addr.s_addr);
 659                 printf("%s/%d", inet_ntoa(cmd->addr),
 660                         contigmask((u_char *)&x, 32));
 661                 x = cmd->addr.s_addr = htonl(cmd->addr.s_addr);
 662                 x &= 0xff; /* base */
 663                 d = (u_int32_t *)&(cmd->mask);
 664                 for (i=0; i < cmd->o.arg1; i++)
 665                         if (d[ i/32] & (1<<(i & 31))) {
 666                                 printf("%c%d", comma, i+x);
 667                                 comma = ',';
 668                         }
 669                 printf("}");
 670                 return;
 671         }
 672         if (cmd->o.opcode == O_IP_SRC || cmd->o.opcode == O_IP_DST)
 673                 mb = 32;
 674         else
 675                 mb = contigmask((u_char *)&(cmd->mask.s_addr), 32);
 676         if (mb == 32 && do_resolv)
 677                 he = gethostbyaddr(&(cmd->addr.s_addr), sizeof(u_long),
 678                     AF_INET);
 679         if (he != NULL)         /* resolved to name */
 680                 printf("%s", he->h_name);
 681         else if (mb == 0)       /* any */
 682                 printf("any");
 683         else {          /* numeric IP followed by some kind of mask */
 684                 printf("%s", inet_ntoa(cmd->addr));
 685                 if (mb < 0)
 686                         printf(":%s", inet_ntoa(cmd->mask));
 687                 else if (mb < 32)
 688                         printf("/%d", mb);
 689         }
 690 }
 691
 692 /*
 693  * prints a MAC address/mask pair
 694  */
 695 static void
 696 print_mac(u_char *addr, u_char *mask)
 697 {
 698         int l = contigmask(mask, 48);
 699
 700         if (l == 0)
 701                 printf(" any");
 702         else {
 703                 printf(" %02x:%02x:%02x:%02x:%02x:%02x",
 704                     addr[0], addr[1], addr[2], addr[3], addr[4], addr[5]);
 705                 if (l == -1)
 706                         printf("&%02x:%02x:%02x:%02x:%02x:%02x",
 707                             mask[0], mask[1], mask[2],
 708                             mask[3], mask[4], mask[5]);
 709                 else if (l < 48)
 710                         printf("/%d", l);
 711         }
 712 }
 713
 714 static void
 715 fill_icmptypes(ipfw_insn_u32 *cmd, char *av)
 716 {
 717         u_int8_t type;
 718
 719         cmd->d[0] = 0;
 720         while (*av) {
 721                 if (*av == ',')
 722                         av++;
 723
 724                 type = strtoul(av, &av, 0);
 725
 726                 if (*av != ',' && *av != '\0')
 727                         errx(EX_DATAERR, "invalid ICMP type");
 728
 729                 if (type > 31)
 730                         errx(EX_DATAERR, "ICMP type out of range");
 731
 732                 cmd->d[0] |= 1 << type;
 733         }
 734         cmd->o.opcode = O_ICMPTYPE;
 735         cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32);
 736 }
 737
 738 static void
 739 print_icmptypes(ipfw_insn_u32 *cmd)
 740 {
 741         int i;
 742         char sep= ' ';
 743
 744         printf(" icmptypes");
 745         for (i = 0; i < 32; i++) {
 746                 if ( (cmd->d[0] & (1 << (i))) == 0)
 747                         continue;
 748                 printf("%c%d", sep, i);
 749                 sep = ',';
 750         }
 751 }
 752
 753 /*
 754  * show_ipfw() prints the body of an ipfw rule.
 755  * Because the standard rule has at least proto src_ip dst_ip, we use
 756  * a helper function to produce these entries if not provided explicitly.
 757  * The first argument is the list of fields we have, the second is
 758  * the list of fields we want to be printed.
 759  *
 760  * Special cases if we have provided a MAC header:
 761  *   + if the rule does not contain IP addresses/ports, do not print them;
 762  *   + if the rule does not contain an IP proto, print "all" instead of "ip";
 763  *
 764  * Once we have 'have_options', IP header fields are printed as options.
 765  */
 766 #define HAVE_PROTO      0x0001
 767 #define HAVE_SRCIP      0x0002
 768 #define HAVE_DSTIP      0x0004
 769 #define HAVE_MAC        0x0008
 770 #define HAVE_MACTYPE    0x0010
 771 #define HAVE_OPTIONS    0x8000
 772
 773 #define HAVE_IP         (HAVE_PROTO | HAVE_SRCIP | HAVE_DSTIP)
 774 static void
 775 show_prerequisites(int *flags, int want, int cmd)
 776 {
 777         if ( (*flags & HAVE_IP) == HAVE_IP)
 778                 *flags |= HAVE_OPTIONS;
 779
 780         if ( (*flags & (HAVE_MAC|HAVE_MACTYPE|HAVE_OPTIONS)) == HAVE_MAC &&
 781              cmd != O_MAC_TYPE) {
 782                 /*
 783                  * mac-type was optimized out by the compiler,
 784                  * restore it
 785                  */
 786                 printf(" any");
 787                 *flags |= HAVE_MACTYPE | HAVE_OPTIONS;
 788                 return;
 789         }
 790         if ( !(*flags & HAVE_OPTIONS)) {
 791                 if ( !(*flags & HAVE_PROTO) && (want & HAVE_PROTO))
 792                         printf(" ip");
 793                 if ( !(*flags & HAVE_SRCIP) && (want & HAVE_SRCIP))
 794                         printf(" from any");
 795                 if ( !(*flags & HAVE_DSTIP) && (want & HAVE_DSTIP))
 796                         printf(" to any");
 797         }
 798         *flags |= want;
 799 }
 800
 801 static void
 802 show_ipfw(struct ipfw_ioc_rule *rule, int pcwidth, int bcwidth)
 803 {
 804         static int twidth = 0;
 805         int l;
 806         ipfw_insn *cmd;
 807         int proto = 0;          /* default */
 808         int flags = 0;  /* prerequisites */
 809         ipfw_insn_log *logptr = NULL; /* set if we find an O_LOG */
 810         int or_block = 0;       /* we are in an or block */
 811
 812         u_int32_t set_disable = rule->set_disable;
 813
 814         if (set_disable & (1 << rule->set)) { /* disabled */
 815                 if (!show_sets)
 816                         return;
 817                 else
 818                         printf("# DISABLED ");
 819         }
 820         printf("%05u ", rule->rulenum);
 821
 822         if (do_acct)
 823                 printf("%*llu %*llu ", pcwidth, rule->pcnt, bcwidth,
 824                     rule->bcnt);
 825
 826         if (do_time) {
 827                 char timestr[30];
 828
 829                 if (twidth == 0) {
 830                         strcpy(timestr, ctime((time_t *)&twidth));
 831                         *strchr(timestr, '\n') = '\0';
 832                         twidth = strlen(timestr);
 833                 }
 834                 if (rule->timestamp) {
 835                         time_t t = _long_to_time(rule->timestamp);
 836
 837                         strcpy(timestr, ctime(&t));
 838                         *strchr(timestr, '\n') = '\0';
 839                         printf("%s ", timestr);
 840                 } else {
 841                         printf("%*s ", twidth, " ");
 842                 }
 843         }
 844
 845         if (show_sets)
 846                 printf("set %d ", rule->set);
 847
 848         /*
 849          * print the optional "match probability"
 850          */
 851         if (rule->cmd_len > 0) {
 852                 cmd = rule->cmd ;
 853                 if (cmd->opcode == O_PROB) {
 854                         ipfw_insn_u32 *p = (ipfw_insn_u32 *)cmd;
 855                         double d = 1.0 * p->d[0];
 856
 857                         d = (d / 0x7fffffff);
 858                         printf("prob %f ", d);
 859                 }
 860         }
 861
 862         /*
 863          * first print actions
 864          */
 865         for (l = rule->cmd_len - rule->act_ofs, cmd = ACTION_PTR(rule);
 866                         l > 0 ; l -= F_LEN(cmd), cmd += F_LEN(cmd)) {
 867                 switch(cmd->opcode) {
 868                 case O_CHECK_STATE:
 869                         printf("check-state");
 870                         flags = HAVE_IP; /* avoid printing anything else */
 871                         break;
 872
 873                 case O_ACCEPT:
 874                         printf("allow");
 875                         break;
 876
 877                 case O_COUNT:
 878                         printf("count");
 879                         break;
 880
 881                 case O_DENY:
 882                         printf("deny");
 883                         break;
 884
 885                 case O_REJECT:
 886                         if (cmd->arg1 == ICMP_REJECT_RST)
 887                                 printf("reset");
 888                         else if (cmd->arg1 == ICMP_UNREACH_HOST)
 889                                 printf("reject");
 890                         else
 891                                 print_reject_code(cmd->arg1);
 892                         break;
 893
 894                 case O_SKIPTO:
 895                         printf("skipto %u", cmd->arg1);
 896                         break;
 897
 898                 case O_PIPE:
 899                         printf("pipe %u", cmd->arg1);
 900                         break;
 901
 902                 case O_QUEUE:
 903                         printf("queue %u", cmd->arg1);
 904                         break;
 905
 906                 case O_DIVERT:
 907                         printf("divert %u", cmd->arg1);
 908                         break;
 909
 910                 case O_TEE:
 911                         printf("tee %u", cmd->arg1);
 912                         break;
 913
 914                 case O_FORWARD_IP:
 915                     {
 916                         ipfw_insn_sa *s = (ipfw_insn_sa *)cmd;
 917
 918                         printf("fwd %s", inet_ntoa(s->sa.sin_addr));
 919                         if (s->sa.sin_port)
 920                                 printf(",%d", s->sa.sin_port);
 921                     }
 922                         break;
 923
 924                 case O_LOG: /* O_LOG is printed last */
 925                         logptr = (ipfw_insn_log *)cmd;
 926                         break;
 927
 928                 default:
 929                         printf("** unrecognized action %d len %d",
 930                                 cmd->opcode, cmd->len);
 931                 }
 932         }
 933         if (logptr) {
 934                 if (logptr->max_log > 0)
 935                         printf(" log logamount %d", logptr->max_log);
 936                 else
 937                         printf(" log");
 938         }
 939
 940         /*
 941          * then print the body.
 942          */
 943         if (rule->usr_flags & IPFW_USR_F_NORULE) {
 944                 /* empty rules before options */
 945                 if (!do_compact)
 946                         printf(" ip from any to any");
 947                 flags |= HAVE_IP | HAVE_OPTIONS;
 948         }
 949
 950         for (l = rule->act_ofs, cmd = rule->cmd ;
 951                         l > 0 ; l -= F_LEN(cmd) , cmd += F_LEN(cmd)) {
 952                 /* useful alias */
 953                 ipfw_insn_u32 *cmd32 = (ipfw_insn_u32 *)cmd;
 954
 955                 show_prerequisites(&flags, 0, cmd->opcode);
 956
 957                 switch(cmd->opcode) {
 958                 case O_PROB:
 959                         break;  /* done already */
 960
 961                 case O_PROBE_STATE:
 962                         break; /* no need to print anything here */
 963
 964                 case O_MACADDR2: {
 965                         ipfw_insn_mac *m = (ipfw_insn_mac *)cmd;
 966
 967                         if ((cmd->len & F_OR) && !or_block)
 968                                 printf(" {");
 969                         if (cmd->len & F_NOT)
 970                                 printf(" not");
 971                         printf(" MAC");
 972                         flags |= HAVE_MAC;
 973                         print_mac( m->addr, m->mask);
 974                         print_mac( m->addr + 6, m->mask + 6);
 975                         }
 976                         break;
 977
 978                 case O_MAC_TYPE:
 979                         if ((cmd->len & F_OR) && !or_block)
 980                                 printf(" {");
 981                         print_newports((ipfw_insn_u16 *)cmd, IPPROTO_ETHERTYPE,
 982                                 (flags & HAVE_OPTIONS) ? cmd->opcode : 0);
 983                         flags |= HAVE_MAC | HAVE_MACTYPE | HAVE_OPTIONS;
 984                         break;
 985
 986                 case O_IP_SRC:
 987                 case O_IP_SRC_MASK:
 988                 case O_IP_SRC_ME:
 989                 case O_IP_SRC_SET:
 990                         show_prerequisites(&flags, HAVE_PROTO, 0);
 991                         if (!(flags & HAVE_SRCIP))
 992                                 printf(" from");
 993                         if ((cmd->len & F_OR) && !or_block)
 994                                 printf(" {");
 995                         print_ip((ipfw_insn_ip *)cmd,
 996                                 (flags & HAVE_OPTIONS) ? " src-ip" : "");
 997                         flags |= HAVE_SRCIP;
 998                         break;
 999
1000                 case O_IP_DST:
1001                 case O_IP_DST_MASK:
1002                 case O_IP_DST_ME:
1003                 case O_IP_DST_SET:
1004                         show_prerequisites(&flags, HAVE_PROTO|HAVE_SRCIP, 0);
1005                         if (!(flags & HAVE_DSTIP))
1006                                 printf(" to");
1007                         if ((cmd->len & F_OR) && !or_block)
1008                                 printf(" {");
1009                         print_ip((ipfw_insn_ip *)cmd,
1010                                 (flags & HAVE_OPTIONS) ? " dst-ip" : "");
1011                         flags |= HAVE_DSTIP;
1012                         break;
1013
1014                 case O_IP_DSTPORT:
1015                         show_prerequisites(&flags, HAVE_IP, 0);
1016                 case O_IP_SRCPORT:
1017                         show_prerequisites(&flags, HAVE_PROTO|HAVE_SRCIP, 0);
1018                         if ((cmd->len & F_OR) && !or_block)
1019                                 printf(" {");
1020                         print_newports((ipfw_insn_u16 *)cmd, proto,
1021                                 (flags & HAVE_OPTIONS) ? cmd->opcode : 0);
1022                         break;
1023
1024                 case O_PROTO: {
1025                         struct protoent *pe;
1026
1027                         if ((cmd->len & F_OR) && !or_block)
1028                                 printf(" {");
1029                         if (cmd->len & F_NOT)
1030                                 printf(" not");
1031                         proto = cmd->arg1;
1032                         pe = getprotobynumber(cmd->arg1);
1033                         if (flags & HAVE_OPTIONS)
1034                                 printf(" proto");
1035                         if (pe)
1036                                 printf(" %s", pe->p_name);
1037                         else
1038                                 printf(" %u", cmd->arg1);
1039                         }
1040                         flags |= HAVE_PROTO;
1041                         break;
1042
1043                 default: /*options ... */
1044                         show_prerequisites(&flags, HAVE_IP | HAVE_OPTIONS, 0);
1045                         if ((cmd->len & F_OR) && !or_block)
1046                                 printf(" {");
1047                         if (cmd->len & F_NOT && cmd->opcode != O_IN)
1048                                 printf(" not");
1049                         switch(cmd->opcode) {
1050                         case O_FRAG:
1051                                 printf(" frag");
1052                                 break;
1053
1054                         case O_IN:
1055                                 printf(cmd->len & F_NOT ? " out" : " in");
1056                                 break;
1057
1058                         case O_LAYER2:
1059                                 printf(" layer2");
1060                                 break;
1061                         case O_XMIT:
1062                         case O_RECV:
1063                         case O_VIA: {
1064                                 char *s;
1065                                 ipfw_insn_if *cmdif = (ipfw_insn_if *)cmd;
1066
1067                                 if (cmd->opcode == O_XMIT)
1068                                         s = "xmit";
1069                                 else if (cmd->opcode == O_RECV)
1070                                         s = "recv";
1071                                 else if (cmd->opcode == O_VIA)
1072                                         s = "via";
1073                                 else
1074                                         s = "?huh?";
1075                                 if (cmdif->name[0] == '\0')
1076                                         printf(" %s %s", s,
1077                                             inet_ntoa(cmdif->p.ip));
1078                                 printf(" %s %s", s, cmdif->name);
1079                                 }
1080                                 break;
1081
1082                         case O_IPID:
1083                                 printf(" ipid %u", cmd->arg1 );
1084                                 break;
1085
1086                         case O_IPTTL:
1087                                 printf(" ipttl %u", cmd->arg1 );
1088                                 break;
1089
1090                         case O_IPVER:
1091                                 printf(" ipver %u", cmd->arg1 );
1092                                 break;
1093
1094                         case O_IPPRECEDENCE:
1095                                 printf(" ipprecedence %u", (cmd->arg1) >> 5 );
1096                                 break;
1097
1098                         case O_IPLEN:
1099                                 printf(" iplen %u", cmd->arg1 );
1100                                 break;
1101
1102                         case O_IPOPT:
1103                                 print_flags("ipoptions", cmd, f_ipopts);
1104                                 break;
1105
1106                         case O_IPTOS:
1107                                 print_flags("iptos", cmd, f_iptos);
1108                                 break;
1109
1110                         case O_ICMPTYPE:
1111                                 print_icmptypes((ipfw_insn_u32 *)cmd);
1112                                 break;
1113
1114                         case O_ESTAB:
1115                                 printf(" established");
1116                                 break;
1117
1118                         case O_TCPFLAGS:
1119                                 print_flags("tcpflags", cmd, f_tcpflags);
1120                                 break;
1121
1122                         case O_TCPOPTS:
1123                                 print_flags("tcpoptions", cmd, f_tcpopts);
1124                                 break;
1125
1126                         case O_TCPWIN:
1127                                 printf(" tcpwin %d", ntohs(cmd->arg1));
1128                                 break;
1129
1130                         case O_TCPACK:
1131                                 printf(" tcpack %ld", ntohl(cmd32->d[0]));
1132                                 break;
1133
1134                         case O_TCPSEQ:
1135                                 printf(" tcpseq %ld", ntohl(cmd32->d[0]));
1136                                 break;
1137
1138                         case O_UID:
1139                             {
1140                                 struct passwd *pwd = getpwuid(cmd32->d[0]);
1141
1142                                 if (pwd)
1143                                         printf(" uid %s", pwd->pw_name);
1144                                 else
1145                                         printf(" uid %u", cmd32->d[0]);
1146                             }
1147                                 break;
1148
1149                         case O_GID:
1150                             {
1151                                 struct group *grp = getgrgid(cmd32->d[0]);
1152
1153                                 if (grp)
1154                                         printf(" gid %s", grp->gr_name);
1155                                 else
1156                                         printf(" gid %u", cmd32->d[0]);
1157                             }
1158                                 break;
1159
1160                         case O_KEEP_STATE:
1161                                 printf(" keep-state");
1162                                 break;
1163
1164                         case O_LIMIT:
1165                             {
1166                                 struct _s_x *p = limit_masks;
1167                                 ipfw_insn_limit *c = (ipfw_insn_limit *)cmd;
1168                                 u_int8_t x = c->limit_mask;
1169                                 char *comma = " ";
1170
1171                                 printf(" limit");
1172                                 for ( ; p->x != 0 ; p++)
1173                                         if ((x & p->x) == p->x) {
1174                                                 x &= ~p->x;
1175                                                 printf("%s%s", comma, p->s);
1176                                                 comma = ",";
1177                                         }
1178                                 printf(" %d", c->conn_limit);
1179                             }
1180                                 break;
1181
1182                         default:
1183                                 printf(" [opcode %d len %d]",
1184                                     cmd->opcode, cmd->len);
1185                         }
1186                 }
1187                 if (cmd->len & F_OR) {
1188                         printf(" or");
1189                         or_block = 1;
1190                 } else if (or_block) {
1191                         printf(" }");
1192                         or_block = 0;
1193                 }
1194         }
1195         show_prerequisites(&flags, HAVE_IP, 0);
1196
1197         printf("\n");
1198 }
1199
1200 static void
1201 show_dyn_ipfw(struct ipfw_ioc_state *d, int pcwidth, int bcwidth)
1202 {
1203         struct protoent *pe;
1204         struct in_addr a;
1205
1206         if (!do_expired) {
1207                 if (!d->expire && !(d->dyn_type == O_LIMIT_PARENT))
1208                         return;
1209         }
1210
1211         printf("%05u %*llu %*llu (%ds)", d->rulenum, pcwidth, d->pcnt,
1212             bcwidth, d->bcnt, d->expire);
1213         switch (d->dyn_type) {
1214         case O_LIMIT_PARENT:
1215                 printf(" PARENT %d", d->count);
1216                 break;
1217         case O_LIMIT:
1218                 printf(" LIMIT");
1219                 break;
1220         case O_KEEP_STATE: /* bidir, no mask */
1221                 printf(" STATE");
1222                 break;
1223         }
1224
1225         if ((pe = getprotobynumber(d->id.u.ip.proto)) != NULL)
1226                 printf(" %s", pe->p_name);
1227         else
1228                 printf(" proto %u", d->id.u.ip.proto);
1229
1230         a.s_addr = htonl(d->id.u.ip.src_ip);
1231         printf(" %s %d", inet_ntoa(a), d->id.u.ip.src_port);
1232
1233         a.s_addr = htonl(d->id.u.ip.dst_ip);
1234         printf(" <-> %s %d", inet_ntoa(a), d->id.u.ip.dst_port);
1235         printf("\n");
1236 }
1237
1238 int
1239 sort_q(const void *pa, const void *pb)
1240 {
1241         int rev = (do_sort < 0);
1242         int field = rev ? -do_sort : do_sort;
1243         long long res = 0;
1244         const struct dn_ioc_flowqueue *a = pa;
1245         const struct dn_ioc_flowqueue *b = pb;
1246
1247         switch (field) {
1248         case 1: /* pkts */
1249                 res = a->len - b->len;
1250                 break;
1251         case 2: /* bytes */
1252                 res = a->len_bytes - b->len_bytes;
1253                 break;
1254
1255         case 3: /* tot pkts */
1256                 res = a->tot_pkts - b->tot_pkts;
1257                 break;
1258
1259         case 4: /* tot bytes */
1260                 res = a->tot_bytes - b->tot_bytes;
1261                 break;
1262         }
1263         if (res < 0)
1264                 res = -1;
1265         if (res > 0)
1266                 res = 1;
1267         return (int)(rev ? res : -res);
1268 }
1269
1270 static void
1271 list_queues(struct dn_ioc_flowset *fs, struct dn_ioc_flowqueue *q)
1272 {
1273         int l;
1274
1275         printf("    mask: 0x%02x 0x%08x/0x%04x -> 0x%08x/0x%04x\n",
1276             fs->flow_mask.u.ip.proto,
1277             fs->flow_mask.u.ip.src_ip, fs->flow_mask.u.ip.src_port,
1278             fs->flow_mask.u.ip.dst_ip, fs->flow_mask.u.ip.dst_port);
1279         if (fs->rq_elements == 0)
1280                 return;
1281
1282         printf("BKT Prot ___Source IP/port____ "
1283             "____Dest. IP/port____ Tot_pkt/bytes Pkt/Byte Drp\n");
1284         if (do_sort != 0)
1285                 heapsort(q, fs->rq_elements, sizeof(*q), sort_q);
1286         for (l = 0; l < fs->rq_elements; l++) {
1287                 struct in_addr ina;
1288                 struct protoent *pe;
1289
1290                 ina.s_addr = htonl(q[l].id.u.ip.src_ip);
1291                 printf("%3d ", q[l].hash_slot);
1292                 pe = getprotobynumber(q[l].id.u.ip.proto);
1293                 if (pe)
1294                         printf("%-4s ", pe->p_name);
1295                 else
1296                         printf("%4u ", q[l].id.u.ip.proto);
1297                 printf("%15s/%-5d ",
1298                     inet_ntoa(ina), q[l].id.u.ip.src_port);
1299                 ina.s_addr = htonl(q[l].id.u.ip.dst_ip);
1300                 printf("%15s/%-5d ",
1301                     inet_ntoa(ina), q[l].id.u.ip.dst_port);
1302                 printf("%4qu %8qu %2u %4u %3u\n",
1303                     q[l].tot_pkts, q[l].tot_bytes,
1304                     q[l].len, q[l].len_bytes, q[l].drops);
1305                 if (verbose)
1306                         printf("   S %20qd  F %20qd\n",
1307                             q[l].S, q[l].F);
1308         }
1309 }
1310
1311 static void
1312 print_flowset_parms(struct dn_ioc_flowset *fs, char *prefix)
1313 {
1314         int l;
1315         char qs[30];
1316         char plr[30];
1317         char red[90];   /* Display RED parameters */
1318
1319         l = fs->qsize;
1320         if (fs->flags_fs & DN_QSIZE_IS_BYTES) {
1321                 if (l >= 8192)
1322                         sprintf(qs, "%d KB", l / 1024);
1323                 else
1324                         sprintf(qs, "%d B", l);
1325         } else
1326                 sprintf(qs, "%3d sl.", l);
1327         if (fs->plr)
1328                 sprintf(plr, "plr %f", 1.0 * fs->plr / (double)(0x7fffffff));
1329         else
1330                 plr[0] = '\0';
1331         if (fs->flags_fs & DN_IS_RED)   /* RED parameters */
1332                 sprintf(red,
1333                     "\n\t  %cRED w_q %f min_th %d max_th %d max_p %f",
1334                     (fs->flags_fs & DN_IS_GENTLE_RED) ? 'G' : ' ',
1335                     1.0 * fs->w_q / (double)(1 << SCALE_RED),
1336                     SCALE_VAL(fs->min_th),
1337                     SCALE_VAL(fs->max_th),
1338                     1.0 * fs->max_p / (double)(1 << SCALE_RED));
1339         else
1340                 sprintf(red, "droptail");
1341
1342         printf("%s %s%s %d queues (%d buckets) %s\n",
1343             prefix, qs, plr, fs->rq_elements, fs->rq_size, red);
1344 }
1345
1346 static void
1347 list_pipes(void *data, int nbytes, int ac, char *av[])
1348 {
1349         u_long rulenum;
1350         void *next = data;
1351         struct dn_ioc_pipe *p = (struct dn_ioc_pipe *)data;
1352         struct dn_ioc_flowset *fs;
1353         struct dn_ioc_flowqueue *q;
1354         int l;
1355
1356         if (ac > 0)
1357                 rulenum = strtoul(*av++, NULL, 10);
1358         else
1359                 rulenum = 0;
1360         for (; nbytes >= sizeof(*p); p = (struct dn_ioc_pipe *)next) {
1361                 double b = p->bandwidth;
1362                 char buf[30];
1363                 char prefix[80];
1364
1365                 if (p->fs.fs_type != DN_IS_PIPE)
1366                         break;  /* done with pipes, now queues */
1367
1368                 /*
1369                  * compute length, as pipe have variable size
1370                  */
1371                 l = sizeof(*p) + p->fs.rq_elements * sizeof(*q);
1372                 next = (void *)p + l;
1373                 nbytes -= l;
1374
1375                 if (rulenum != 0 && rulenum != p->pipe_nr)
1376                         continue;
1377
1378                 /*
1379                  * Print rate
1380                  */
1381                 if (b == 0)
1382                         sprintf(buf, "unlimited");
1383                 else if (b >= 1000000)
1384                         sprintf(buf, "%7.3f Mbit/s", b/1000000);
1385                 else if (b >= 1000)
1386                         sprintf(buf, "%7.3f Kbit/s", b/1000);
1387                 else
1388                         sprintf(buf, "%7.3f bit/s ", b);
1389
1390                 sprintf(prefix, "%05d: %s %4d ms ",
1391                     p->pipe_nr, buf, p->delay);
1392                 print_flowset_parms(&p->fs, prefix);
1393                 if (verbose)
1394                         printf("   V %20qd\n", p->V >> MY_M);
1395
1396                 q = (struct dn_ioc_flowqueue *)(p+1);
1397                 list_queues(&p->fs, q);
1398         }
1399         for (fs = next; nbytes >= sizeof(*fs); fs = next) {
1400                 char prefix[80];
1401
1402                 if (fs->fs_type != DN_IS_QUEUE)
1403                         break;
1404                 l = sizeof(*fs) + fs->rq_elements * sizeof(*q);
1405                 next = (void *)fs + l;
1406                 nbytes -= l;
1407                 q = (struct dn_ioc_flowqueue *)(fs+1);
1408                 sprintf(prefix, "q%05d: weight %d pipe %d ",
1409                     fs->fs_nr, fs->weight, fs->parent_nr);
1410                 print_flowset_parms(fs, prefix);
1411                 list_queues(fs, q);
1412         }
1413 }
1414
1415 /*
1416  * This one handles all set-related commands
1417  *      ipfw set { show | enable | disable }
1418  *      ipfw set swap X Y
1419  *      ipfw set move X to Y
1420  *      ipfw set move rule X to Y
1421  */
1422 static void
1423 sets_handler(int ac, char *av[])
1424 {
1425         u_int32_t set_disable, masks[2];
1426         int i, nbytes;
1427         u_int16_t rulenum;
1428         u_int8_t cmd, new_set;
1429
1430         ac--;
1431         av++;
1432
1433         if (!ac)
1434                 errx(EX_USAGE, "set needs command");
1435         if (!strncmp(*av, "show", strlen(*av)) ) {
1436                 void *data;
1437                 char *msg;
1438
1439                 nbytes = sizeof(struct ipfw_ioc_rule);
1440                 if ((data = malloc(nbytes)) == NULL)
1441                         err(EX_OSERR, "malloc");
1442                 if (getsockopt(s, IPPROTO_IP, IP_FW_GET, data, &nbytes) < 0)
1443                         err(EX_OSERR, "getsockopt(IP_FW_GET)");
1444                 set_disable = ((struct ipfw_ioc_rule *)data)->set_disable;
1445
1446                 for (i = 0, msg = "disable" ; i < 31; i++)
1447                         if (  (set_disable & (1<<i))) {
1448                                 printf("%s %d", msg, i);
1449                                 msg = "";
1450                         }
1451                 msg = (set_disable) ? " enable" : "enable";
1452                 for (i = 0; i < 31; i++)
1453                         if ( !(set_disable & (1<<i))) {
1454                                 printf("%s %d", msg, i);
1455                                 msg = "";
1456                         }
1457                 printf("\n");
1458         } else if (!strncmp(*av, "swap", strlen(*av))) {
1459                 ac--; av++;
1460                 if (ac != 2)
1461                         errx(EX_USAGE, "set swap needs 2 set numbers\n");
1462                 rulenum = atoi(av[0]);
1463                 new_set = atoi(av[1]);
1464                 if (!isdigit(*(av[0])) || rulenum > 30)
1465                         errx(EX_DATAERR, "invalid set number %s\n", av[0]);
1466                 if (!isdigit(*(av[1])) || new_set > 30)
1467                         errx(EX_DATAERR, "invalid set number %s\n", av[1]);
1468                 masks[0] = (4 << 24) | (new_set << 16) | (rulenum);
1469                 i = setsockopt(s, IPPROTO_IP, IP_FW_DEL,
1470                         masks, sizeof(u_int32_t));
1471         } else if (!strncmp(*av, "move", strlen(*av))) {
1472                 ac--; av++;
1473                 if (ac && !strncmp(*av, "rule", strlen(*av))) {
1474                         cmd = 2;
1475                         ac--; av++;
1476                 } else
1477                         cmd = 3;
1478                 if (ac != 3 || strncmp(av[1], "to", strlen(*av)))
1479                         errx(EX_USAGE, "syntax: set move [rule] X to Y\n");
1480                 rulenum = atoi(av[0]);
1481                 new_set = atoi(av[2]);
1482                 if (!isdigit(*(av[0])) || (cmd == 3 && rulenum > 30) ||
1483                         (cmd == 2 && rulenum == 65535) )
1484                         errx(EX_DATAERR, "invalid source number %s\n", av[0]);
1485                 if (!isdigit(*(av[2])) || new_set > 30)
1486                         errx(EX_DATAERR, "invalid dest. set %s\n", av[1]);
1487                 masks[0] = (cmd << 24) | (new_set << 16) | (rulenum);
1488                 i = setsockopt(s, IPPROTO_IP, IP_FW_DEL,
1489                         masks, sizeof(u_int32_t));
1490         } else if (!strncmp(*av, "disable", strlen(*av)) ||
1491                    !strncmp(*av, "enable",  strlen(*av)) ) {
1492                 int which = !strncmp(*av, "enable",  strlen(*av)) ? 1 : 0;
1493
1494                 ac--; av++;
1495                 masks[0] = masks[1] = 0;
1496
1497                 while (ac) {
1498                         if (isdigit(**av)) {
1499                                 i = atoi(*av);
1500                                 if (i < 0 || i > 30)
1501                                         errx(EX_DATAERR,
1502                                             "invalid set number %d\n", i);
1503                                 masks[which] |= (1<<i);
1504                         } else if (!strncmp(*av, "disable", strlen(*av)))
1505                                 which = 0;
1506                         else if (!strncmp(*av, "enable", strlen(*av)))
1507                                 which = 1;
1508                         else
1509                                 errx(EX_DATAERR,
1510                                         "invalid set command %s\n", *av);
1511                         av++; ac--;
1512                 }
1513                 if ( (masks[0] & masks[1]) != 0 )
1514                         errx(EX_DATAERR,
1515                             "cannot enable and disable the same set\n");
1516
1517                 i = setsockopt(s, IPPROTO_IP, IP_FW_DEL, masks, sizeof(masks));
1518                 if (i)
1519                         warn("set enable/disable: setsockopt(IP_FW_DEL)");
1520         } else
1521                 errx(EX_USAGE, "invalid set command %s\n", *av);
1522 }
1523
1524 static void
1525 sysctl_handler(int ac, char *av[], int which)
1526 {
1527         ac--;
1528         av++;
1529
1530         if (*av == NULL) {
1531                 warnx("missing keyword to enable/disable\n");
1532         } else if (strncmp(*av, "firewall", strlen(*av)) == 0) {
1533                 sysctlbyname("net.inet.ip.fw.enable", NULL, 0,
1534                     &which, sizeof(which));
1535         } else if (strncmp(*av, "one_pass", strlen(*av)) == 0) {
1536                 sysctlbyname("net.inet.ip.fw.one_pass", NULL, 0,
1537                     &which, sizeof(which));
1538         } else if (strncmp(*av, "debug", strlen(*av)) == 0) {
1539                 sysctlbyname("net.inet.ip.fw.debug", NULL, 0,
1540                     &which, sizeof(which));
1541         } else if (strncmp(*av, "verbose", strlen(*av)) == 0) {
1542                 sysctlbyname("net.inet.ip.fw.verbose", NULL, 0,
1543                     &which, sizeof(which));
1544         } else if (strncmp(*av, "dyn_keepalive", strlen(*av)) == 0) {
1545                 sysctlbyname("net.inet.ip.fw.dyn_keepalive", NULL, 0,
1546                     &which, sizeof(which));
1547         } else {
1548                 warnx("unrecognize enable/disable keyword: %s\n", *av);
1549         }
1550 }
1551
1552 static void
1553 list(int ac, char *av[])
1554 {
1555         struct ipfw_ioc_rule *r;
1556         struct ipfw_ioc_state *dynrules, *d;
1557
1558         void *data = NULL;
1559         int bcwidth, n, nbytes, nstat, ndyn, pcwidth, width;
1560         int exitval = EX_OK;
1561         int lac;
1562         char **lav;
1563         u_long rnum;
1564         char *endptr;
1565         int seen = 0;
1566
1567         const int ocmd = do_pipe ? IP_DUMMYNET_GET : IP_FW_GET;
1568         int nalloc = 1024;      /* start somewhere... */
1569
1570         ac--;
1571         av++;
1572
1573         /* get rules or pipes from kernel, resizing array as necessary */
1574         nbytes = nalloc;
1575
1576         while (nbytes >= nalloc) {
1577                 nalloc = nalloc * 2 + 200;
1578                 nbytes = nalloc;
1579                 if ((data = realloc(data, nbytes)) == NULL)
1580                         err(EX_OSERR, "realloc");
1581                 if (getsockopt(s, IPPROTO_IP, ocmd, data, &nbytes) < 0)
1582                         err(EX_OSERR, "getsockopt(IP_%s_GET)",
1583                                 do_pipe ? "DUMMYNET" : "FW");
1584         }
1585
1586         if (do_pipe) {
1587                 list_pipes(data, nbytes, ac, av);
1588                 goto done;
1589         }
1590
1591         /*
1592          * Count static rules.
1593          */
1594         r = data;
1595         nstat = r->static_count;
1596
1597         /*
1598          * Count dynamic rules. This is easier as they have
1599          * fixed size.
1600          */
1601         dynrules = (struct ipfw_ioc_state *)((void *)r + r->static_len);
1602         ndyn = (nbytes - r->static_len) / sizeof(*dynrules);
1603
1604         /* if showing stats, figure out column widths ahead of time */
1605         bcwidth = pcwidth = 0;
1606         if (do_acct) {
1607                 for (n = 0, r = data; n < nstat;
1608                     n++, r = (void *)r + IOC_RULESIZE(r)) {
1609                         /* packet counter */
1610                         width = snprintf(NULL, 0, "%llu", r->pcnt);
1611                         if (width > pcwidth)
1612                                 pcwidth = width;
1613
1614                         /* byte counter */
1615                         width = snprintf(NULL, 0, "%llu", r->bcnt);
1616                         if (width > bcwidth)
1617                                 bcwidth = width;
1618                 }
1619         }
1620         if (do_dynamic && ndyn) {
1621                 for (n = 0, d = dynrules; n < ndyn; n++, d++) {
1622                         width = snprintf(NULL, 0, "%llu", d->pcnt);
1623                         if (width > pcwidth)
1624                                 pcwidth = width;
1625
1626                         width = snprintf(NULL, 0, "%llu", d->bcnt);
1627                         if (width > bcwidth)
1628                                 bcwidth = width;
1629                 }
1630         }
1631         /* if no rule numbers were specified, list all rules */
1632         if (ac == 0) {
1633                 for (n = 0, r = data; n < nstat;
1634                     n++, r = (void *)r + IOC_RULESIZE(r) )
1635                         show_ipfw(r, pcwidth, bcwidth);
1636
1637                 if (do_dynamic && ndyn) {
1638                         printf("## Dynamic rules (%d):\n", ndyn);
1639                         for (n = 0, d = dynrules; n < ndyn; n++, d++)
1640                                 show_dyn_ipfw(d, pcwidth, bcwidth);
1641                 }
1642                 goto done;
1643         }
1644
1645         /* display specific rules requested on command line */
1646
1647         for (lac = ac, lav = av; lac != 0; lac--) {
1648                 /* convert command line rule # */
1649                 rnum = strtoul(*lav++, &endptr, 10);
1650                 if (*endptr) {
1651                         exitval = EX_USAGE;
1652                         warnx("invalid rule number: %s", *(lav - 1));
1653                         continue;
1654                 }
1655                 for (n = seen = 0, r = data; n < nstat;
1656                     n++, r = (void *)r + IOC_RULESIZE(r) ) {
1657                         if (r->rulenum > rnum)
1658                                 break;
1659                         if (r->rulenum == rnum) {
1660                                 show_ipfw(r, pcwidth, bcwidth);
1661                                 seen = 1;
1662                         }
1663                 }
1664                 if (!seen) {
1665                         /* give precedence to other error(s) */
1666                         if (exitval == EX_OK)
1667                                 exitval = EX_UNAVAILABLE;
1668                         warnx("rule %lu does not exist", rnum);
1669                 }
1670         }
1671
1672         if (do_dynamic && ndyn) {
1673                 printf("## Dynamic rules:\n");
1674                 for (lac = ac, lav = av; lac != 0; lac--) {
1675                         rnum = strtoul(*lav++, &endptr, 10);
1676                         if (*endptr)
1677                                 /* already warned */
1678                                 continue;
1679                         for (n = 0, d = dynrules; n < ndyn; n++, d++) {
1680                                 if (d->rulenum > rnum)
1681                                         break;
1682                                 if (d->rulenum == rnum)
1683                                         show_dyn_ipfw(d, pcwidth, bcwidth);
1684                         }
1685                 }
1686         }
1687
1688         ac = 0;
1689
1690 done:
1691         free(data);
1692
1693         if (exitval != EX_OK)
1694                 exit(exitval);
1695 }
1696
1697 static void
1698 show_usage(void)
1699 {
1700         fprintf(stderr, "usage: ipfw [options]\n"
1701 "    add [number] rule\n"
1702 "    pipe number config [pipeconfig]\n"
1703 "    queue number config [queueconfig]\n"
1704 "    [pipe] flush\n"
1705 "    [pipe] delete number ...\n"
1706 "    [pipe] {list|show} [number ...]\n"
1707 "    {zero|resetlog} [number ...]\n"
1708 "do \"ipfw -h\" or see ipfw manpage for details\n"
1709 );
1710
1711         exit(EX_USAGE);
1712 }
1713
1714 static void
1715 help(void)
1716 {
1717
1718         fprintf(stderr, "ipfw syntax summary:\n"
1719 "ipfw add [N] [prob {0..1}] ACTION [log [logamount N]] ADDR OPTIONS\n"
1720 "ipfw {pipe|queue} N config BODY\n"
1721 "ipfw [pipe] {zero|delete|show} [N{,N}]\n"
1722 "\n"
1723 "RULE:          [1..] [PROB] BODY\n"
1724 "RULENUM:       INTEGER(1..65534)\n"
1725 "PROB:          prob REAL(0..1)\n"
1726 "BODY:          check-state [LOG] (no body) |\n"
1727 "               ACTION [LOG] MATCH_ADDR [OPTION_LIST]\n"
1728 "ACTION:        check-state | allow | count | deny | reject | skipto N |\n"
1729 "               {divert|tee} PORT | forward ADDR | pipe N | queue N\n"
1730 "ADDR:          [ MAC dst src ether_type ] \n"
1731 "               [ from IPLIST [ PORT ] to IPLIST [ PORTLIST ] ]\n"
1732 "IPLIST:        IPADDR | ( IPADDR or ... or IPADDR )\n"
1733 "IPADDR:        [not] { any | me | ip | ip/bits | ip:mask | ip/bits{x,y,z} }\n"
1734 "OPTION_LIST:   OPTION [,OPTION_LIST]\n"
1735 );
1736 exit(0);
1737 }
1738
1739
1740 static int
1741 lookup_host (char *host, struct in_addr *ipaddr)
1742 {
1743         struct hostent *he;
1744
1745         if (!inet_aton(host, ipaddr)) {
1746                 if ((he = gethostbyname(host)) == NULL)
1747                         return(-1);
1748                 *ipaddr = *(struct in_addr *)he->h_addr_list[0];
1749         }
1750         return(0);
1751 }
1752
1753 /*
1754  * fills the addr and mask fields in the instruction as appropriate from av.
1755  * Update length as appropriate.
1756  * The following formats are allowed:
1757  *      any     matches any IP. Actually returns an empty instruction.
1758  *      me      returns O_IP_*_ME
1759  *      1.2.3.4         single IP address
1760  *      1.2.3.4:5.6.7.8 address:mask
1761  *      1.2.3.4/24      address/mask
1762  *      1.2.3.4/26{1,6,5,4,23}  set of addresses in a subnet
1763  */
1764 static void
1765 fill_ip(ipfw_insn_ip *cmd, char *av)
1766 {
1767         char *p = NULL, md = 0;
1768         u_int32_t i;
1769
1770         cmd->o.len &= ~F_LEN_MASK;      /* zero len */
1771
1772         if (!strncmp(av, "any", strlen(av)))
1773                 return;
1774
1775         if (!strncmp(av, "me", strlen(av))) {
1776                 cmd->o.len |= F_INSN_SIZE(ipfw_insn);
1777                 return;
1778         }
1779
1780         p = strchr(av, '/');
1781         if (!p)
1782                 p = strchr(av, ':');
1783         if (p) {
1784                 md = *p;
1785                 *p++ = '\0';
1786         }
1787
1788         if (lookup_host(av, &cmd->addr) != 0)
1789                 errx(EX_NOHOST, "hostname ``%s'' unknown", av);
1790         switch (md) {
1791         case ':':
1792                 if (!inet_aton(p, &cmd->mask))
1793                         errx(EX_DATAERR, "bad netmask ``%s''", p);
1794                 break;
1795         case '/':
1796                 i = atoi(p);
1797                 if (i == 0)
1798                         cmd->mask.s_addr = htonl(0);
1799                 else if (i > 32)
1800                         errx(EX_DATAERR, "bad width ``%s''", p);
1801                 else
1802                         cmd->mask.s_addr = htonl(~0 << (32 - i));
1803                 break;
1804         default:
1805                 cmd->mask.s_addr = htonl(~0);
1806                 break;
1807         }
1808         cmd->addr.s_addr &= cmd->mask.s_addr;
1809         /*
1810          * now look if we have a set of addresses. They are stored as follows:
1811          *   arg1       is the set size (powers of 2, 2..256)
1812          *   addr       is the base address IN HOST FORMAT
1813          *   mask..     is an array of u_int32_t with bits set.
1814          */
1815         if (p)
1816                 p = strchr(p, '{');
1817         if (p) {        /* fetch addresses */
1818                 u_int32_t *d;
1819                 int low, high;
1820                 int i = contigmask((u_char *)&(cmd->mask), 32);
1821
1822                 if (i < 24 || i > 31) {
1823                         fprintf(stderr, "invalid set with mask %d\n",
1824                                 i);
1825                         exit(0);
1826                 }
1827                 cmd->o.arg1 = 1<<(32-i);
1828                 cmd->addr.s_addr = ntohl(cmd->addr.s_addr);
1829                 d = (u_int32_t *)&cmd->mask;
1830                 cmd->o.opcode = O_IP_DST_SET;   /* default */
1831                 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32) + (cmd->o.arg1+31)/32;
1832                 for (i = 0; i < (cmd->o.arg1+31)/32 ; i++)
1833                         d[i] = 0;       /* clear masks */
1834
1835                 av = p+1;
1836                 low = cmd->addr.s_addr & 0xff;
1837                 high = low + cmd->o.arg1 - 1;
1838                 while (isdigit(*av)) {
1839                         char *s;
1840                         u_int16_t a = strtol(av, &s, 0);
1841
1842                         if (s == av) /* no parameter */
1843                                 break;
1844                         if (a < low || a > high) {
1845                             fprintf(stderr, "addr %d out of range [%d-%d]\n",
1846                                 a, low, high);
1847                             exit(0);
1848                         }
1849                         a -= low;
1850                         d[ a/32] |= 1<<(a & 31);
1851                         if (*s != ',')
1852                                 break;
1853                         av = s+1;
1854                 }
1855                 return;
1856         }
1857
1858         if (cmd->mask.s_addr == 0) { /* any */
1859                 if (cmd->o.len & F_NOT)
1860                         errx(EX_DATAERR, "not any never matches");
1861                 else    /* useless, nuke it */
1862                         return;
1863         } else if (cmd->mask.s_addr ==  IP_MASK_ALL)    /* one IP */
1864                 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32);
1865         else                                            /* addr/mask */
1866                 cmd->o.len |= F_INSN_SIZE(ipfw_insn_ip);
1867 }
1868
1869
1870 /*
1871  * helper function to process a set of flags and set bits in the
1872  * appropriate masks.
1873  */
1874 static void
1875 fill_flags(ipfw_insn *cmd, enum ipfw_opcodes opcode,
1876         struct _s_x *flags, char *p)
1877 {
1878         u_int8_t set=0, clear=0;
1879
1880         while (p && *p) {
1881                 char *q;        /* points to the separator */
1882                 int val;
1883                 u_int8_t *which;        /* mask we are working on */
1884
1885                 if (*p == '!') {
1886                         p++;
1887                         which = &clear;
1888                 } else
1889                         which = &set;
1890                 q = strchr(p, ',');
1891                 if (q)
1892                         *q++ = '\0';
1893                 val = match_token(flags, p);
1894                 if (val <= 0)
1895                         errx(EX_DATAERR, "invalid flag %s", p);
1896                 *which |= (u_int8_t)val;
1897                 p = q;
1898         }
1899         cmd->opcode = opcode;
1900         cmd->len =  (cmd->len & (F_NOT | F_OR)) | 1;
1901         cmd->arg1 = (set & 0xff) | ( (clear & 0xff) << 8);
1902 }
1903
1904
1905 static void
1906 delete(int ac, char *av[])
1907 {
1908         u_int32_t rulenum;
1909         struct dn_ioc_pipe pipe;
1910         int i;
1911         int exitval = EX_OK;
1912         int do_set = 0;
1913
1914         memset(&pipe, 0, sizeof pipe);
1915
1916         av++; ac--;
1917         if (ac > 0 && !strncmp(*av, "set", strlen(*av))) {
1918                 do_set = 1;     /* delete set */
1919                 ac--; av++;
1920         }
1921
1922         /* Rule number */
1923         while (ac && isdigit(**av)) {
1924                 i = atoi(*av); av++; ac--;
1925                 if (do_pipe) {
1926                         if (do_pipe == 1)
1927                                 pipe.pipe_nr = i;
1928                         else
1929                                 pipe.fs.fs_nr = i;
1930                         i = setsockopt(s, IPPROTO_IP, IP_DUMMYNET_DEL,
1931                             &pipe, sizeof pipe);
1932                         if (i) {
1933                                 exitval = 1;
1934                                 warn("rule %u: setsockopt(IP_DUMMYNET_DEL)",
1935                                     do_pipe == 1 ? pipe.pipe_nr :
1936                                     pipe.fs.fs_nr);
1937                         }
1938                 } else {
1939                         rulenum =  (i & 0xffff) | (do_set << 24);
1940                         i = setsockopt(s, IPPROTO_IP, IP_FW_DEL, &rulenum,
1941                             sizeof rulenum);
1942                         if (i) {
1943                                 exitval = EX_UNAVAILABLE;
1944                                 warn("rule %u: setsockopt(IP_FW_DEL)",
1945                                     rulenum);
1946                         }
1947                 }
1948         }
1949         if (exitval != EX_OK)
1950                 exit(exitval);
1951 }
1952
1953
1954 /*
1955  * fill the interface structure. We do not check the name as we can
1956  * create interfaces dynamically, so checking them at insert time
1957  * makes relatively little sense.
1958  * Interface names containing '*', '?', or '[' are assumed to be shell
1959  * patterns which match interfaces.
1960  */
1961 static void
1962 fill_iface(ipfw_insn_if *cmd, char *arg)
1963 {
1964         cmd->name[0] = '\0';
1965         cmd->o.len |= F_INSN_SIZE(ipfw_insn_if);
1966
1967         /* Parse the interface or address */
1968         if (!strcmp(arg, "any"))
1969                 cmd->o.len = 0;         /* effectively ignore this command */
1970         else if (!isdigit(*arg)) {
1971                 strlcpy(cmd->name, arg, sizeof(cmd->name));
1972                 cmd->p.glob = strpbrk(arg, "*?[") != NULL ? 1 : 0;
1973         } else if (!inet_aton(arg, &cmd->p.ip))
1974                 errx(EX_DATAERR, "bad ip address ``%s''", arg);
1975 }
1976
1977 static unsigned long
1978 getbw(const char *str, u_short *flags, int kb)
1979 {
1980     char *end;
1981     unsigned long val;
1982     int inbytes = 0;
1983
1984     val = strtoul(str, &end, 0);
1985     if (*end == 'k' || *end == 'K') {
1986         ++end;
1987         val *= kb;
1988     } else if (*end == 'm' || *end == 'M') {
1989         ++end;
1990         val *= kb * kb;
1991     }
1992
1993     /*
1994      * Deal with bits or bytes or b(bits) or B(bytes).  If there is no
1995      * trailer assume bits.
1996      */
1997     if (strncasecmp(end, "bit", 3) == 0) {
1998         ;
1999     } else if (strncasecmp(end, "byte", 4) == 0) {
2000         inbytes = 1;
2001     } else if (*end == 'b') {
2002         ;
2003     } else if (*end == 'B') {
2004         inbytes = 1;
2005     }
2006
2007     /*
2008      * Return in bits if flags is NULL, else flag bits
2009      * or bytes in flags and return the unconverted value.
2010      */
2011     if (inbytes && flags)
2012         *flags |= DN_QSIZE_IS_BYTES;
2013     else if (inbytes && flags == NULL)
2014         val *= 8;
2015     return(val);
2016 }
2017
2018 /*
2019  * the following macro returns an error message if we run out of
2020  * arguments.
2021  */
2022 #define NEED1(msg)      {if (!ac) errx(EX_USAGE, msg);}
2023
2024 static void
2025 config_pipe(int ac, char **av)
2026 {
2027         struct dn_ioc_pipe pipe;
2028         int i;
2029         char *end;
2030         u_int32_t a;
2031         void *par = NULL;
2032
2033         memset(&pipe, 0, sizeof pipe);
2034
2035         av++; ac--;
2036         /* Pipe number */
2037         if (ac && isdigit(**av)) {
2038                 i = atoi(*av); av++; ac--;
2039                 if (do_pipe == 1)
2040                         pipe.pipe_nr = i;
2041                 else
2042                         pipe.fs.fs_nr = i;
2043         }
2044         while (ac > 0) {
2045                 double d;
2046                 int tok = match_token(dummynet_params, *av);
2047                 ac--; av++;
2048
2049                 switch(tok) {
2050                 case TOK_NOERROR:
2051                         pipe.fs.flags_fs |= DN_NOERROR;
2052                         break;
2053
2054                 case TOK_PLR:
2055                         NEED1("plr needs argument 0..1\n");
2056                         d = strtod(av[0], NULL);
2057                         if (d > 1)
2058                                 d = 1;
2059                         else if (d < 0)
2060                                 d = 0;
2061                         pipe.fs.plr = (int)(d*0x7fffffff);
2062                         ac--; av++;
2063                         break;
2064
2065                 case TOK_QUEUE:
2066                         NEED1("queue needs queue size\n");
2067                         end = NULL;
2068                         pipe.fs.qsize = getbw(av[0], &pipe.fs.flags_fs, 1024);
2069                         ac--; av++;
2070                         break;
2071
2072                 case TOK_BUCKETS:
2073                         NEED1("buckets needs argument\n");
2074                         pipe.fs.rq_size = strtoul(av[0], NULL, 0);
2075                         ac--; av++;
2076                         break;
2077
2078                 case TOK_MASK:
2079                         NEED1("mask needs mask specifier\n");
2080                         /*
2081                          * per-flow queue, mask is dst_ip, dst_port,
2082                          * src_ip, src_port, proto measured in bits
2083                          */
2084                         par = NULL;
2085
2086                         pipe.fs.flow_mask.type = ETHERTYPE_IP;
2087                         pipe.fs.flow_mask.u.ip.dst_ip = 0;
2088                         pipe.fs.flow_mask.u.ip.src_ip = 0;
2089                         pipe.fs.flow_mask.u.ip.dst_port = 0;
2090                         pipe.fs.flow_mask.u.ip.src_port = 0;
2091                         pipe.fs.flow_mask.u.ip.proto = 0;
2092                         end = NULL;
2093
2094                         while (ac >= 1) {
2095                             u_int32_t *p32 = NULL;
2096                             u_int16_t *p16 = NULL;
2097
2098                             tok = match_token(dummynet_params, *av);
2099                             ac--; av++;
2100                             switch(tok) {
2101                             case TOK_ALL:
2102                                     /*
2103                                      * special case, all bits significant
2104                                      */
2105                                     pipe.fs.flow_mask.u.ip.dst_ip = ~0;
2106                                     pipe.fs.flow_mask.u.ip.src_ip = ~0;
2107                                     pipe.fs.flow_mask.u.ip.dst_port = ~0;
2108                                     pipe.fs.flow_mask.u.ip.src_port = ~0;
2109                                     pipe.fs.flow_mask.u.ip.proto = ~0;
2110                                     pipe.fs.flags_fs |= DN_HAVE_FLOW_MASK;
2111                                     goto end_mask;
2112
2113                             case TOK_DSTIP:
2114                                     p32 = &pipe.fs.flow_mask.u.ip.dst_ip;
2115                                     break;
2116
2117                             case TOK_SRCIP:
2118                                     p32 = &pipe.fs.flow_mask.u.ip.src_ip;
2119                                     break;
2120
2121                             case TOK_DSTPORT:
2122                                     p16 = &pipe.fs.flow_mask.u.ip.dst_port;
2123                                     break;
2124
2125                             case TOK_SRCPORT:
2126                                     p16 = &pipe.fs.flow_mask.u.ip.src_port;
2127                                     break;
2128
2129                             case TOK_PROTO:
2130                                     break;
2131
2132                             default:
2133                                     ac++; av--; /* backtrack */
2134                                     goto end_mask;
2135                             }
2136                             if (ac < 1)
2137                                     errx(EX_USAGE, "mask: value missing");
2138                             if (*av[0] == '/') {
2139                                     a = strtoul(av[0]+1, &end, 0);
2140                                     a = (a == 32) ? ~0 : (1 << a) - 1;
2141                             } else
2142                                     a = strtoul(av[0], &end, 0);
2143                             if (p32 != NULL)
2144                                     *p32 = a;
2145                             else if (p16 != NULL) {
2146                                     if (a > 65535)
2147                                             errx(EX_DATAERR,
2148                                                 "mask: must be 16 bit");
2149                                     *p16 = (u_int16_t)a;
2150                             } else {
2151                                     if (a > 255)
2152                                             errx(EX_DATAERR,
2153                                                 "mask: must be 8 bit");
2154                                     pipe.fs.flow_mask.u.ip.proto = (uint8_t)a;
2155                             }
2156                             if (a != 0)
2157                                     pipe.fs.flags_fs |= DN_HAVE_FLOW_MASK;
2158                             ac--; av++;
2159                         } /* end while, config masks */
2160 end_mask:
2161                         break;
2162
2163                 case TOK_RED:
2164                 case TOK_GRED:
2165                         NEED1("red/gred needs w_q/min_th/max_th/max_p\n");
2166                         pipe.fs.flags_fs |= DN_IS_RED;
2167                         if (tok == TOK_GRED)
2168                                 pipe.fs.flags_fs |= DN_IS_GENTLE_RED;
2169                         /*
2170                          * the format for parameters is w_q/min_th/max_th/max_p
2171                          */
2172                         if ((end = strsep(&av[0], "/"))) {
2173                             double w_q = strtod(end, NULL);
2174                             if (w_q > 1 || w_q <= 0)
2175                                 errx(EX_DATAERR, "0 < w_q <= 1");
2176                             pipe.fs.w_q = (int) (w_q * (1 << SCALE_RED));
2177                         }
2178                         if ((end = strsep(&av[0], "/"))) {
2179                             pipe.fs.min_th = strtoul(end, &end, 0);
2180                             if (*end == 'K' || *end == 'k')
2181                                 pipe.fs.min_th *= 1024;
2182                         }
2183                         if ((end = strsep(&av[0], "/"))) {
2184                             pipe.fs.max_th = strtoul(end, &end, 0);
2185                             if (*end == 'K' || *end == 'k')
2186                                 pipe.fs.max_th *= 1024;
2187                         }
2188                         if ((end = strsep(&av[0], "/"))) {
2189                             double max_p = strtod(end, NULL);
2190                             if (max_p > 1 || max_p <= 0)
2191                                 errx(EX_DATAERR, "0 < max_p <= 1");
2192                             pipe.fs.max_p = (int)(max_p * (1 << SCALE_RED));
2193                         }
2194                         ac--; av++;
2195                         break;
2196
2197                 case TOK_DROPTAIL:
2198                         pipe.fs.flags_fs &= ~(DN_IS_RED|DN_IS_GENTLE_RED);
2199                         break;
2200
2201                 case TOK_BW:
2202                         NEED1("bw needs bandwidth\n");
2203                         if (do_pipe != 1)
2204                             errx(EX_DATAERR, "bandwidth only valid for pipes");
2205                         /*
2206                          * set bandwidth value
2207                          */
2208                         pipe.bandwidth = getbw(av[0], NULL, 1000);
2209                         if (pipe.bandwidth < 0)
2210                             errx(EX_DATAERR, "bandwidth too large");
2211                         ac--; av++;
2212                         break;
2213
2214                 case TOK_DELAY:
2215                         if (do_pipe != 1)
2216                                 errx(EX_DATAERR, "delay only valid for pipes");
2217                         NEED1("delay needs argument 0..10000ms\n");
2218                         pipe.delay = strtoul(av[0], NULL, 0);
2219                         ac--; av++;
2220                         break;
2221
2222                 case TOK_WEIGHT:
2223                         if (do_pipe == 1)
2224                                 errx(EX_DATAERR,"weight only valid for queues");
2225                         NEED1("weight needs argument 0..100\n");
2226                         pipe.fs.weight = strtoul(av[0], &end, 0);
2227                         ac--; av++;
2228                         break;
2229
2230                 case TOK_PIPE:
2231                         if (do_pipe == 1)
2232                                 errx(EX_DATAERR,"pipe only valid for queues");
2233                         NEED1("pipe needs pipe_number\n");
2234                         pipe.fs.parent_nr = strtoul(av[0], &end, 0);
2235                         ac--; av++;
2236                         break;
2237
2238                 default:
2239                         errx(EX_DATAERR, "unrecognised option ``%s''", *av);
2240                 }
2241         }
2242         if (do_pipe == 1) {
2243                 if (pipe.pipe_nr == 0)
2244                         errx(EX_DATAERR, "pipe_nr must be > 0");
2245                 if (pipe.delay > 10000)
2246                         errx(EX_DATAERR, "delay must be < 10000");
2247         } else { /* do_pipe == 2, queue */
2248                 if (pipe.fs.parent_nr == 0)
2249                         errx(EX_DATAERR, "pipe must be > 0");
2250                 if (pipe.fs.weight >100)
2251                         errx(EX_DATAERR, "weight must be <= 100");
2252         }
2253         if (pipe.fs.flags_fs & DN_QSIZE_IS_BYTES) {
2254                 if (pipe.fs.qsize > 1024*1024)
2255                         errx(EX_DATAERR, "queue size must be < 1MB");
2256         } else {
2257                 if (pipe.fs.qsize > 100)
2258                         errx(EX_DATAERR, "2 <= queue size <= 100");
2259         }
2260         if (pipe.fs.flags_fs & DN_IS_RED) {
2261                 size_t len;
2262                 int lookup_depth, avg_pkt_size;
2263                 double s, idle, weight, w_q;
2264                 int clock_hz;
2265                 int t;
2266
2267                 if (pipe.fs.min_th >= pipe.fs.max_th)
2268                     errx(EX_DATAERR, "min_th %d must be < than max_th %d",
2269                         pipe.fs.min_th, pipe.fs.max_th);
2270                 if (pipe.fs.max_th == 0)
2271                     errx(EX_DATAERR, "max_th must be > 0");
2272
2273                 len = sizeof(int);
2274                 if (sysctlbyname("net.inet.ip.dummynet.red_lookup_depth",
2275                         &lookup_depth, &len, NULL, 0) == -1)
2276
2277                     errx(1, "sysctlbyname(\"%s\")",
2278                         "net.inet.ip.dummynet.red_lookup_depth");
2279                 if (lookup_depth == 0)
2280                     errx(EX_DATAERR, "net.inet.ip.dummynet.red_lookup_depth"
2281                         " must be greater than zero");
2282
2283                 len = sizeof(int);
2284                 if (sysctlbyname("net.inet.ip.dummynet.red_avg_pkt_size",
2285                         &avg_pkt_size, &len, NULL, 0) == -1)
2286
2287                     errx(1, "sysctlbyname(\"%s\")",
2288                         "net.inet.ip.dummynet.red_avg_pkt_size");
2289                 if (avg_pkt_size == 0)
2290                         errx(EX_DATAERR,
2291                             "net.inet.ip.dummynet.red_avg_pkt_size must"
2292                             " be greater than zero");
2293
2294                 len = sizeof(clock_hz);
2295                 if (sysctlbyname("net.inet.ip.dummynet.hz", &clock_hz, &len,
2296                                  NULL, 0) == -1) {
2297                         errx(1, "sysctlbyname(\"%s\")",
2298                              "net.inet.ip.dummynet.hz");
2299                 }
2300
2301                 /*
2302                  * Ticks needed for sending a medium-sized packet.
2303                  * Unfortunately, when we are configuring a WF2Q+ queue, we
2304                  * do not have bandwidth information, because that is stored
2305                  * in the parent pipe, and also we have multiple queues
2306                  * competing for it. So we set s=0, which is not very
2307                  * correct. But on the other hand, why do we want RED with
2308                  * WF2Q+ ?
2309                  */
2310                 if (pipe.bandwidth==0) /* this is a WF2Q+ queue */
2311                         s = 0;
2312                 else
2313                         s = clock_hz * avg_pkt_size * 8 / pipe.bandwidth;
2314
2315                 /*
2316                  * max idle time (in ticks) before avg queue size becomes 0.
2317                  * NOTA:  (3/w_q) is approx the value x so that
2318                  * (1-w_q)^x < 10^-3.
2319                  */
2320                 w_q = ((double)pipe.fs.w_q) / (1 << SCALE_RED);
2321                 idle = s * 3. / w_q;
2322                 pipe.fs.lookup_step = (int)idle / lookup_depth;
2323                 if (!pipe.fs.lookup_step)
2324                         pipe.fs.lookup_step = 1;
2325                 weight = 1 - w_q;
2326                 for (t = pipe.fs.lookup_step; t > 0; --t)
2327                         weight *= weight;
2328                 pipe.fs.lookup_weight = (int)(weight * (1 << SCALE_RED));
2329         }
2330         i = setsockopt(s, IPPROTO_IP, IP_DUMMYNET_CONFIGURE, &pipe,
2331                             sizeof pipe);
2332         if (i)
2333                 err(1, "setsockopt(%s)", "IP_DUMMYNET_CONFIGURE");
2334 }
2335
2336 static void
2337 get_mac_addr_mask(char *p, u_char *addr, u_char *mask)
2338 {
2339         int i, l;
2340
2341         for (i=0; i<6; i++)
2342                 addr[i] = mask[i] = 0;
2343         if (!strcmp(p, "any"))
2344                 return;
2345
2346         for (i=0; *p && i<6;i++, p++) {
2347                 addr[i] = strtol(p, &p, 16);
2348                 if (*p != ':') /* we start with the mask */
2349                         break;
2350         }
2351         if (*p == '/') { /* mask len */
2352                 l = strtol(p+1, &p, 0);
2353                 for (i=0; l>0; l -=8, i++)
2354                         mask[i] = (l >=8) ? 0xff : (~0) << (8-l);
2355         } else if (*p == '&') { /* mask */
2356                 for (i=0, p++; *p && i<6;i++, p++) {
2357                         mask[i] = strtol(p, &p, 16);
2358                         if (*p != ':')
2359                                 break;
2360                 }
2361         } else if (*p == '\0') {
2362                 for (i=0; i<6; i++)
2363                         mask[i] = 0xff;
2364         }
2365         for (i=0; i<6; i++)
2366                 addr[i] &= mask[i];
2367 }
2368
2369 /*
2370  * helper function, updates the pointer to cmd with the length
2371  * of the current command, and also cleans up the first word of
2372  * the new command in case it has been clobbered before.
2373  */
2374 static ipfw_insn *
2375 next_cmd(ipfw_insn *cmd)
2376 {
2377         cmd += F_LEN(cmd);
2378         bzero(cmd, sizeof(*cmd));
2379         return cmd;
2380 }
2381
2382 /*
2383  * A function to fill simple commands of size 1.
2384  * Existing flags are preserved.
2385  */
2386 static void
2387 fill_cmd(ipfw_insn *cmd, enum ipfw_opcodes opcode, int flags, u_int16_t arg)
2388 {
2389         cmd->opcode = opcode;
2390         cmd->len =  ((cmd->len | flags) & (F_NOT | F_OR)) | 1;
2391         cmd->arg1 = arg;
2392 }
2393
2394 /*
2395  * Fetch and add the MAC address and type, with masks. This generates one or
2396  * two microinstructions, and returns the pointer to the last one.
2397  */
2398 static ipfw_insn *
2399 add_mac(ipfw_insn *cmd, int ac, char *av[])
2400 {
2401         ipfw_insn_mac *mac;
2402
2403         if (ac < 2)
2404                 errx(EX_DATAERR, "MAC dst src");
2405
2406         cmd->opcode = O_MACADDR2;
2407         cmd->len = (cmd->len & (F_NOT | F_OR)) | F_INSN_SIZE(ipfw_insn_mac);
2408
2409         mac = (ipfw_insn_mac *)cmd;
2410         get_mac_addr_mask(av[0], mac->addr, mac->mask); /* dst */
2411         get_mac_addr_mask(av[1], &(mac->addr[6]), &(mac->mask[6])); /* src */
2412         return cmd;
2413 }
2414
2415 static ipfw_insn *
2416 add_mactype(ipfw_insn *cmd, int ac, char *av)
2417 {
2418         if (ac < 1)
2419                 errx(EX_DATAERR, "missing MAC type");
2420         if (strcmp(av, "any") != 0) { /* we have a non-null type */
2421                 fill_newports((ipfw_insn_u16 *)cmd, av, IPPROTO_ETHERTYPE);
2422                 cmd->opcode = O_MAC_TYPE;
2423                 return cmd;
2424         } else
2425                 return NULL;
2426 }
2427
2428 static ipfw_insn *
2429 add_proto(ipfw_insn *cmd, char *av)
2430 {
2431         struct protoent *pe;
2432         u_char proto = 0;
2433
2434         if (!strncmp(av, "all", strlen(av)))
2435                 ; /* same as "ip" */
2436         else if ((proto = atoi(av)) > 0)
2437                 ; /* all done! */
2438         else if ((pe = getprotobyname(av)) != NULL)
2439                 proto = pe->p_proto;
2440         else
2441                 return NULL;
2442         if (proto != IPPROTO_IP)
2443                 fill_cmd(cmd, O_PROTO, 0, proto);
2444         return cmd;
2445 }
2446
2447 static ipfw_insn *
2448 add_srcip(ipfw_insn *cmd, char *av)
2449 {
2450         fill_ip((ipfw_insn_ip *)cmd, av);
2451         if (cmd->opcode == O_IP_DST_SET)                        /* set */
2452                 cmd->opcode = O_IP_SRC_SET;
2453         else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn))          /* me */
2454                 cmd->opcode = O_IP_SRC_ME;
2455         else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_u32))      /* one IP */
2456                 cmd->opcode = O_IP_SRC;
2457         else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_ip))       /* addr/mask */
2458                 cmd->opcode = O_IP_SRC_MASK;
2459         return cmd;
2460 }
2461
2462 static ipfw_insn *
2463 add_dstip(ipfw_insn *cmd, char *av)
2464 {
2465         fill_ip((ipfw_insn_ip *)cmd, av);
2466         if (cmd->opcode == O_IP_DST_SET)                        /* set */
2467                 ;
2468         else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn))          /* me */
2469                 cmd->opcode = O_IP_DST_ME;
2470         else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_u32))      /* one IP */
2471                 cmd->opcode = O_IP_DST;
2472         else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_ip))       /* addr/mask */
2473                 cmd->opcode = O_IP_DST_MASK;
2474         return cmd;
2475 }
2476
2477 static ipfw_insn *
2478 add_ports(ipfw_insn *cmd, char *av, u_char proto, int opcode)
2479 {
2480         if (!strncmp(av, "any", strlen(av))) {
2481                 return NULL;
2482         } else if (fill_newports((ipfw_insn_u16 *)cmd, av, proto)) {
2483                 /* XXX todo: check that we have a protocol with ports */
2484                 cmd->opcode = opcode;
2485                 return cmd;
2486         }
2487         return NULL;
2488 }
2489
2490 /*
2491  * Parse arguments and assemble the microinstructions which make up a rule.
2492  * Rules are added into the 'rulebuf' and then copied in the correct order
2493  * into the actual rule.
2494  *
2495  * The syntax for a rule starts with the action, followed by an
2496  * optional log action, and the various match patterns.
2497  * In the assembled microcode, the first opcode must be a O_PROBE_STATE
2498  * (generated if the rule includes a keep-state option), then the
2499  * various match patterns, the "log" action, and the actual action.
2500  *
2501  */
2502 static void
2503 add(int ac, char *av[])
2504 {
2505         /*
2506          * rules are added into the 'rulebuf' and then copied in
2507          * the correct order into the actual rule.
2508          * Some things that need to go out of order (prob, action etc.)
2509          * go into actbuf[].
2510          */
2511         static uint32_t rulebuf[IPFW_RULE_SIZE_MAX];
2512         static uint32_t actbuf[IPFW_RULE_SIZE_MAX];
2513         static uint32_t cmdbuf[IPFW_RULE_SIZE_MAX];
2514
2515         ipfw_insn *src, *dst, *cmd, *action, *prev = NULL;
2516         ipfw_insn *first_cmd;   /* first match pattern */
2517
2518         struct ipfw_ioc_rule *rule;
2519
2520         /*
2521          * various flags used to record that we entered some fields.
2522          */
2523         ipfw_insn *have_state = NULL;   /* check-state or keep-state */
2524
2525         int i;
2526
2527         int open_par = 0;       /* open parenthesis ( */
2528
2529         /* proto is here because it is used to fetch ports */
2530         u_char proto = IPPROTO_IP;      /* default protocol */
2531
2532         double match_prob = 1; /* match probability, default is always match */
2533
2534         bzero(actbuf, sizeof(actbuf));          /* actions go here */
2535         bzero(cmdbuf, sizeof(cmdbuf));
2536         bzero(rulebuf, sizeof(rulebuf));
2537
2538         rule = (struct ipfw_ioc_rule *)rulebuf;
2539         cmd = (ipfw_insn *)cmdbuf;
2540         action = (ipfw_insn *)actbuf;
2541
2542         av++; ac--;
2543
2544         /* [rule N]     -- Rule number optional */
2545         if (ac && isdigit(**av)) {
2546                 rule->rulenum = atoi(*av);
2547                 av++;
2548                 ac--;
2549         }
2550
2551         /* [set N]      -- set number (0..30), optional */
2552         if (ac > 1 && !strncmp(*av, "set", strlen(*av))) {
2553                 int set = strtoul(av[1], NULL, 10);
2554                 if (set < 0 || set > 30)
2555                         errx(EX_DATAERR, "illegal set %s", av[1]);
2556                 rule->set = set;
2557                 av += 2; ac -= 2;
2558         }
2559
2560         /* [prob D]     -- match probability, optional */
2561         if (ac > 1 && !strncmp(*av, "prob", strlen(*av))) {
2562                 match_prob = strtod(av[1], NULL);
2563
2564                 if (match_prob <= 0 || match_prob > 1)
2565                         errx(EX_DATAERR, "illegal match prob. %s", av[1]);
2566                 av += 2; ac -= 2;
2567         }
2568
2569         /* action       -- mandatory */
2570         NEED1("missing action");
2571         i = match_token(rule_actions, *av);
2572         ac--; av++;
2573         action->len = 1;        /* default */
2574         switch(i) {
2575         case TOK_CHECKSTATE:
2576                 have_state = action;
2577                 action->opcode = O_CHECK_STATE;
2578                 break;
2579
2580         case TOK_ACCEPT:
2581                 action->opcode = O_ACCEPT;
2582                 break;
2583
2584         case TOK_DENY:
2585                 action->opcode = O_DENY;
2586                 action->arg1 = 0;
2587                 break;
2588
2589         case TOK_REJECT:
2590                 action->opcode = O_REJECT;
2591                 action->arg1 = ICMP_UNREACH_HOST;
2592                 break;
2593
2594         case TOK_RESET:
2595                 action->opcode = O_REJECT;
2596                 action->arg1 = ICMP_REJECT_RST;
2597                 break;
2598
2599         case TOK_UNREACH:
2600                 action->opcode = O_REJECT;
2601                 NEED1("missing reject code");
2602                 fill_reject_code(&action->arg1, *av);
2603                 ac--; av++;
2604                 break;
2605
2606         case TOK_COUNT:
2607                 action->opcode = O_COUNT;
2608                 break;
2609
2610         case TOK_QUEUE:
2611         case TOK_PIPE:
2612                 action->len = F_INSN_SIZE(ipfw_insn_pipe);
2613         case TOK_SKIPTO:
2614                 if (i == TOK_QUEUE)
2615                         action->opcode = O_QUEUE;
2616                 else if (i == TOK_PIPE)
2617                         action->opcode = O_PIPE;
2618                 else if (i == TOK_SKIPTO)
2619                         action->opcode = O_SKIPTO;
2620                 NEED1("missing skipto/pipe/queue number");
2621                 action->arg1 = strtoul(*av, NULL, 10);
2622                 av++; ac--;
2623                 break;
2624
2625         case TOK_DIVERT:
2626         case TOK_TEE:
2627                 action->opcode = (i == TOK_DIVERT) ? O_DIVERT : O_TEE;
2628                 NEED1("missing divert/tee port");
2629                 action->arg1 = strtoul(*av, NULL, 0);
2630                 if (action->arg1 == 0) {
2631                         struct servent *s;
2632                         setservent(1);
2633                         s = getservbyname(av[0], "divert");
2634                         if (s != NULL)
2635                                 action->arg1 = ntohs(s->s_port);
2636                         else
2637                                 errx(EX_DATAERR, "illegal divert/tee port");
2638                 }
2639                 ac--; av++;
2640                 break;
2641
2642         case TOK_FORWARD: {
2643                 ipfw_insn_sa *p = (ipfw_insn_sa *)action;
2644                 char *s, *end;
2645
2646                 NEED1("missing forward address[:port]");
2647
2648                 action->opcode = O_FORWARD_IP;
2649                 action->len = F_INSN_SIZE(ipfw_insn_sa);
2650
2651                 p->sa.sin_len = sizeof(struct sockaddr_in);
2652                 p->sa.sin_family = AF_INET;
2653                 p->sa.sin_port = 0;
2654                 /*
2655                  * locate the address-port separator (':' or ',')
2656                  */
2657                 s = strchr(*av, ':');
2658                 if (s == NULL)
2659                         s = strchr(*av, ',');
2660                 if (s != NULL) {
2661                         *(s++) = '\0';
2662                         i = strtoport(s, &end, 0 /* base */, 0 /* proto */);
2663                         if (s == end)
2664                                 errx(EX_DATAERR,
2665                                     "illegal forwarding port ``%s''", s);
2666                         p->sa.sin_port = (u_short)i;
2667                 }
2668                 lookup_host(*av, &(p->sa.sin_addr));
2669                 }
2670                 ac--; av++;
2671                 break;
2672
2673         default:
2674                 errx(EX_DATAERR, "invalid action %s\n", av[-1]);
2675         }
2676         action = next_cmd(action);
2677
2678         /*
2679          * [log [logamount N]]  -- log, optional
2680          *
2681          * If exists, it goes first in the cmdbuf, but then it is
2682          * skipped in the copy section to the end of the buffer.
2683          */
2684         if (ac && !strncmp(*av, "log", strlen(*av))) {
2685                 ipfw_insn_log *c = (ipfw_insn_log *)cmd;
2686
2687                 cmd->len = F_INSN_SIZE(ipfw_insn_log);
2688                 cmd->opcode = O_LOG;
2689                 av++; ac--;
2690                 if (ac && !strncmp(*av, "logamount", strlen(*av))) {
2691                         ac--; av++;
2692                         NEED1("logamount requires argument");
2693                         c->max_log = atoi(*av);
2694                         if (c->max_log < 0)
2695                                 errx(EX_DATAERR, "logamount must be positive");
2696                         ac--; av++;
2697                 }
2698                 cmd = next_cmd(cmd);
2699         }
2700
2701         if (have_state) /* must be a check-state, we are done */
2702                 goto done;
2703
2704 #define OR_START(target)                                        \
2705         if (ac && (*av[0] == '(' || *av[0] == '{')) {           \
2706                 if (open_par)                                   \
2707                         errx(EX_USAGE, "nested \"(\" not allowed\n"); \
2708                 prev = NULL;                                    \
2709                 open_par = 1;                                   \
2710                 if ( (av[0])[1] == '\0') {                      \
2711                         ac--; av++;                             \
2712                 } else                                          \
2713                         (*av)++;                                \
2714         }                                                       \
2715         target:                                                 \
2716
2717
2718 #define CLOSE_PAR                                               \
2719         if (open_par) {                                         \
2720                 if (ac && (                                     \
2721                     !strncmp(*av, ")", strlen(*av)) ||          \
2722                     !strncmp(*av, "}", strlen(*av)) )) {        \
2723                         prev = NULL;                            \
2724                         open_par = 0;                           \
2725                         ac--; av++;                             \
2726                 } else                                          \
2727                         errx(EX_USAGE, "missing \")\"\n");      \
2728         }
2729
2730 #define NOT_BLOCK                                               \
2731         if (ac && !strncmp(*av, "not", strlen(*av))) {          \
2732                 if (cmd->len & F_NOT)                           \
2733                         errx(EX_USAGE, "double \"not\" not allowed\n"); \
2734                 cmd->len |= F_NOT;                              \
2735                 ac--; av++;                                     \
2736         }
2737
2738 #define OR_BLOCK(target)                                        \
2739         if (ac && !strncmp(*av, "or", strlen(*av))) {           \
2740                 if (prev == NULL || open_par == 0)              \
2741                         errx(EX_DATAERR, "invalid OR block");   \
2742                 prev->len |= F_OR;                              \
2743                 ac--; av++;                                     \
2744                 goto target;                                    \
2745         }                                                       \
2746         CLOSE_PAR;
2747
2748         first_cmd = cmd;
2749
2750 #if 0
2751         /*
2752          * MAC addresses, optional.
2753          * If we have this, we skip the part "proto from src to dst"
2754          * and jump straight to the option parsing.
2755          */
2756         NOT_BLOCK;
2757         NEED1("missing protocol");
2758         if (!strncmp(*av, "MAC", strlen(*av)) ||
2759             !strncmp(*av, "mac", strlen(*av))) {
2760                 ac--; av++;     /* the "MAC" keyword */
2761                 add_mac(cmd, ac, av); /* exits in case of errors */
2762                 cmd = next_cmd(cmd);
2763                 ac -= 2; av += 2;       /* dst-mac and src-mac */
2764                 NOT_BLOCK;
2765                 NEED1("missing mac type");
2766                 if (add_mactype(cmd, ac, av[0]))
2767                         cmd = next_cmd(cmd);
2768                 ac--; av++;     /* any or mac-type */
2769                 goto read_options;
2770         }
2771 #endif
2772
2773         /*
2774          * protocol, mandatory
2775          */
2776     OR_START(get_proto);
2777         NOT_BLOCK;
2778         NEED1("missing protocol");
2779         if (add_proto(cmd, *av)) {
2780                 av++; ac--;
2781                 if (F_LEN(cmd) == 0)    /* plain IP */
2782                         proto = 0;
2783                 else {
2784                         proto = cmd->arg1;
2785                         prev = cmd;
2786                         cmd = next_cmd(cmd);
2787                 }
2788         } else if (first_cmd != cmd) {
2789                 errx(EX_DATAERR, "invalid protocol ``%s''", *av);
2790         } else
2791                 goto read_options;
2792     OR_BLOCK(get_proto);
2793
2794         /*
2795          * "from", mandatory
2796          */
2797         if (!ac || strncmp(*av, "from", strlen(*av)))
2798                 errx(EX_USAGE, "missing ``from''");
2799         ac--; av++;
2800
2801         /*
2802          * source IP, mandatory
2803          */
2804     OR_START(source_ip);
2805         NOT_BLOCK;      /* optional "not" */
2806         NEED1("missing source address");
2807         if (add_srcip(cmd, *av)) {
2808                 ac--; av++;
2809                 if (F_LEN(cmd) != 0) {  /* ! any */
2810                         prev = cmd;
2811                         cmd = next_cmd(cmd);
2812                 }
2813         }
2814     OR_BLOCK(source_ip);
2815
2816         /*
2817          * source ports, optional
2818          */
2819         NOT_BLOCK;      /* optional "not" */
2820         if (ac) {
2821                 if (!strncmp(*av, "any", strlen(*av)) ||
2822                     add_ports(cmd, *av, proto, O_IP_SRCPORT)) {
2823                         ac--; av++;
2824                         if (F_LEN(cmd) != 0)
2825                                 cmd = next_cmd(cmd);
2826                 }
2827         }
2828
2829         /*
2830          * "to", mandatory
2831          */
2832         if (!ac || strncmp(*av, "to", strlen(*av)))
2833                 errx(EX_USAGE, "missing ``to''");
2834         av++; ac--;
2835
2836         /*
2837          * destination, mandatory
2838          */
2839     OR_START(dest_ip);
2840         NOT_BLOCK;      /* optional "not" */
2841         NEED1("missing dst address");
2842         if (add_dstip(cmd, *av)) {
2843                 ac--; av++;
2844                 if (F_LEN(cmd) != 0) {  /* ! any */
2845                         prev = cmd;
2846                         cmd = next_cmd(cmd);
2847                 }
2848         }
2849     OR_BLOCK(dest_ip);
2850
2851         /*
2852          * dest. ports, optional
2853          */
2854         NOT_BLOCK;      /* optional "not" */
2855         if (ac) {
2856                 if (!strncmp(*av, "any", strlen(*av)) ||
2857                     add_ports(cmd, *av, proto, O_IP_DSTPORT)) {
2858                         ac--; av++;
2859                         if (F_LEN(cmd) != 0)
2860                                 cmd = next_cmd(cmd);
2861                 }
2862         }
2863
2864 read_options:
2865         if (ac && first_cmd == cmd) {
2866                 /*
2867                  * nothing specified so far, store in the rule to ease
2868                  * printout later.
2869                  */
2870                  rule->usr_flags = IPFW_USR_F_NORULE;
2871         }
2872         prev = NULL;
2873         while (ac) {
2874                 char *s;
2875                 ipfw_insn_u32 *cmd32;   /* alias for cmd */
2876
2877                 s = *av;
2878                 cmd32 = (ipfw_insn_u32 *)cmd;
2879
2880                 if (*s == '!') {        /* alternate syntax for NOT */
2881                         if (cmd->len & F_NOT)
2882                                 errx(EX_USAGE, "double \"not\" not allowed\n");
2883                         cmd->len = F_NOT;
2884                         s++;
2885                 }
2886                 i = match_token(rule_options, s);
2887                 ac--; av++;
2888                 switch(i) {
2889                 case TOK_NOT:
2890                         if (cmd->len & F_NOT)
2891                                 errx(EX_USAGE, "double \"not\" not allowed\n");
2892                         cmd->len = F_NOT;
2893                         break;
2894
2895                 case TOK_OR:
2896                         if (open_par == 0 || prev == NULL)
2897                                 errx(EX_USAGE, "invalid \"or\" block\n");
2898                         prev->len |= F_OR;
2899                         break;
2900
2901                 case TOK_STARTBRACE:
2902                         if (open_par)
2903                                 errx(EX_USAGE, "+nested \"(\" not allowed\n");
2904                         open_par = 1;
2905                         break;
2906
2907                 case TOK_ENDBRACE:
2908                         if (!open_par)
2909                                 errx(EX_USAGE, "+missing \")\"\n");
2910                         open_par = 0;
2911                         prev = NULL;
2912                         break;
2913
2914                 case TOK_IN:
2915                         fill_cmd(cmd, O_IN, 0, 0);
2916                         break;
2917
2918                 case TOK_OUT:
2919                         cmd->len ^= F_NOT; /* toggle F_NOT */
2920                         fill_cmd(cmd, O_IN, 0, 0);
2921                         break;
2922
2923                 case TOK_FRAG:
2924                         fill_cmd(cmd, O_FRAG, 0, 0);
2925                         break;
2926
2927                 case TOK_LAYER2:
2928                         fill_cmd(cmd, O_LAYER2, 0, 0);
2929                         break;
2930
2931                 case TOK_XMIT:
2932                 case TOK_RECV:
2933                 case TOK_VIA:
2934                         NEED1("recv, xmit, via require interface name"
2935                                 " or address");
2936                         fill_iface((ipfw_insn_if *)cmd, av[0]);
2937                         ac--; av++;
2938                         if (F_LEN(cmd) == 0)    /* not a valid address */
2939                                 break;
2940                         if (i == TOK_XMIT)
2941                                 cmd->opcode = O_XMIT;
2942                         else if (i == TOK_RECV)
2943                                 cmd->opcode = O_RECV;
2944                         else if (i == TOK_VIA)
2945                                 cmd->opcode = O_VIA;
2946                         break;
2947
2948                 case TOK_ICMPTYPES:
2949                         NEED1("icmptypes requires list of types");
2950                         fill_icmptypes((ipfw_insn_u32 *)cmd, *av);
2951                         av++; ac--;
2952                         break;
2953
2954                 case TOK_IPTTL:
2955                         NEED1("ipttl requires TTL");
2956                         fill_cmd(cmd, O_IPTTL, 0, strtoul(*av, NULL, 0));
2957                         ac--; av++;
2958                         break;
2959
2960                 case TOK_IPID:
2961                         NEED1("ipid requires length");
2962                         fill_cmd(cmd, O_IPID, 0, strtoul(*av, NULL, 0));
2963                         ac--; av++;
2964                         break;
2965
2966                 case TOK_IPLEN:
2967                         NEED1("iplen requires length");
2968                         fill_cmd(cmd, O_IPLEN, 0, strtoul(*av, NULL, 0));
2969                         ac--; av++;
2970                         break;
2971
2972                 case TOK_IPVER:
2973                         NEED1("ipver requires version");
2974                         fill_cmd(cmd, O_IPVER, 0, strtoul(*av, NULL, 0));
2975                         ac--; av++;
2976                         break;
2977
2978                 case TOK_IPPRECEDENCE:
2979                         NEED1("ipprecedence requires value");
2980                         fill_cmd(cmd, O_IPPRECEDENCE, 0,
2981                             (strtoul(*av, NULL, 0) & 7) << 5);
2982                         ac--; av++;
2983                         break;
2984
2985                 case TOK_IPOPTS:
2986                         NEED1("missing argument for ipoptions");
2987                         fill_flags(cmd, O_IPOPT, f_ipopts, *av);
2988                         ac--; av++;
2989                         break;
2990
2991                 case TOK_IPTOS:
2992                         NEED1("missing argument for iptos");
2993                         fill_flags(cmd, O_IPTOS, f_iptos, *av);
2994                         ac--; av++;
2995                         break;
2996
2997                 case TOK_UID:
2998                         NEED1("uid requires argument");
2999                     {
3000                         char *end;
3001                         uid_t uid;
3002                         struct passwd *pwd;
3003
3004                         cmd->opcode = O_UID;
3005                         uid = strtoul(*av, &end, 0);
3006                         pwd = (*end == '\0') ? getpwuid(uid) : getpwnam(*av);
3007                         if (pwd == NULL)
3008                                 errx(EX_DATAERR, "uid \"%s\" nonexistent", *av);
3009                         cmd32->d[0] = pwd->pw_uid;
3010                         cmd->len = F_INSN_SIZE(ipfw_insn_u32);
3011                         ac--; av++;
3012                     }
3013                         break;
3014
3015                 case TOK_GID:
3016                         NEED1("gid requires argument");
3017                     {
3018                         char *end;
3019                         gid_t gid;
3020                         struct group *grp;
3021
3022                         cmd->opcode = O_GID;
3023                         gid = strtoul(*av, &end, 0);
3024                         grp = (*end == '\0') ? getgrgid(gid) : getgrnam(*av);
3025                         if (grp == NULL)
3026                                 errx(EX_DATAERR, "gid \"%s\" nonexistent", *av);
3027                         cmd32->d[0] = grp->gr_gid;
3028                         cmd->len = F_INSN_SIZE(ipfw_insn_u32);
3029                         ac--; av++;
3030                     }
3031                         break;
3032
3033                 case TOK_ESTAB:
3034                         fill_cmd(cmd, O_ESTAB, 0, 0);
3035                         break;
3036
3037                 case TOK_SETUP:
3038                         fill_cmd(cmd, O_TCPFLAGS, 0,
3039                                 (TH_SYN) | ( (TH_ACK) & 0xff) <<8 );
3040                         break;
3041
3042                 case TOK_TCPOPTS:
3043                         NEED1("missing argument for tcpoptions");
3044                         fill_flags(cmd, O_TCPOPTS, f_tcpopts, *av);
3045                         ac--; av++;
3046                         break;
3047
3048                 case TOK_TCPSEQ:
3049                 case TOK_TCPACK:
3050                         NEED1("tcpseq/tcpack requires argument");
3051                         cmd->len = F_INSN_SIZE(ipfw_insn_u32);
3052                         cmd->opcode = (i == TOK_TCPSEQ) ? O_TCPSEQ : O_TCPACK;
3053                         cmd32->d[0] = htonl(strtoul(*av, NULL, 0));
3054                         ac--; av++;
3055                         break;
3056
3057                 case TOK_TCPWIN:
3058                         NEED1("tcpwin requires length");
3059                         fill_cmd(cmd, O_TCPWIN, 0,
3060                             htons(strtoul(*av, NULL, 0)));
3061                         ac--; av++;
3062                         break;
3063
3064                 case TOK_TCPFLAGS:
3065                         NEED1("missing argument for tcpflags");
3066                         cmd->opcode = O_TCPFLAGS;
3067                         fill_flags(cmd, O_TCPFLAGS, f_tcpflags, *av);
3068                         ac--; av++;
3069                         break;
3070
3071                 case TOK_KEEPSTATE:
3072                         if (open_par)
3073                                 errx(EX_USAGE, "keep-state cannot be part "
3074                                     "of an or block");
3075                         if (have_state)
3076                                 errx(EX_USAGE, "only one of keep-state "
3077                                         "and limit is allowed");
3078                         have_state = cmd;
3079                         fill_cmd(cmd, O_KEEP_STATE, 0, 0);
3080                         break;
3081
3082                 case TOK_LIMIT:
3083                         if (open_par)
3084                                 errx(EX_USAGE, "limit cannot be part "
3085                                     "of an or block");
3086                         if (have_state)
3087                                 errx(EX_USAGE, "only one of keep-state "
3088                                         "and limit is allowed");
3089                         NEED1("limit needs mask and # of connections");
3090                         have_state = cmd;
3091                     {
3092                         ipfw_insn_limit *c = (ipfw_insn_limit *)cmd;
3093
3094                         cmd->len = F_INSN_SIZE(ipfw_insn_limit);
3095                         cmd->opcode = O_LIMIT;
3096                         c->limit_mask = 0;
3097                         c->conn_limit = 0;
3098                         for (; ac >1 ;) {
3099                                 int val;
3100
3101                                 val = match_token(limit_masks, *av);
3102                                 if (val <= 0)
3103                                         break;
3104                                 c->limit_mask |= val;
3105                                 ac--; av++;
3106                         }
3107                         c->conn_limit = atoi(*av);
3108                         if (c->conn_limit == 0)
3109                                 errx(EX_USAGE, "limit: limit must be >0");
3110                         if (c->limit_mask == 0)
3111                                 errx(EX_USAGE, "missing limit mask");
3112                         ac--; av++;
3113                     }
3114                         break;
3115
3116                 case TOK_PROTO:
3117                         NEED1("missing protocol");
3118                         if (add_proto(cmd, *av)) {
3119                                 proto = cmd->arg1;
3120                                 ac--; av++;
3121                         } else
3122                                 errx(EX_DATAERR, "invalid protocol ``%s''", *av);
3123                         break;
3124
3125                 case TOK_SRCIP:
3126                         NEED1("missing source IP");
3127                         if (add_srcip(cmd, *av)) {
3128                                 ac--; av++;
3129                         }
3130                         break;
3131
3132                 case TOK_DSTIP:
3133                         NEED1("missing destination IP");
3134                         if (add_dstip(cmd, *av)) {
3135                                 ac--; av++;
3136                         }
3137                         break;
3138
3139                 case TOK_SRCPORT:
3140                         NEED1("missing source port");
3141                         if (!strncmp(*av, "any", strlen(*av)) ||
3142                             add_ports(cmd, *av, proto, O_IP_SRCPORT)) {
3143                                 ac--; av++;
3144                         } else
3145                                 errx(EX_DATAERR, "invalid source port %s", *av);
3146                         break;
3147
3148                 case TOK_DSTPORT:
3149                         NEED1("missing destination port");
3150                         if (!strncmp(*av, "any", strlen(*av)) ||
3151                             add_ports(cmd, *av, proto, O_IP_DSTPORT)) {
3152                                 ac--; av++;
3153                         } else
3154                                 errx(EX_DATAERR, "invalid destination port %s",
3155                                     *av);
3156                         break;
3157
3158                 case TOK_MAC:
3159                         if (ac < 2)
3160                                 errx(EX_USAGE, "MAC dst-mac src-mac");
3161                         if (add_mac(cmd, ac, av)) {
3162                                 ac -= 2; av += 2;
3163                         }
3164                         break;
3165
3166                 case TOK_MACTYPE:
3167                         NEED1("missing mac type");
3168                         if (!add_mactype(cmd, ac, *av))
3169                                 errx(EX_DATAERR, "invalid mac type %s", *av);
3170                         ac--; av++;
3171                         break;
3172
3173                 default:
3174                         errx(EX_USAGE, "unrecognised option [%d] %s\n", i, s);
3175                 }
3176                 if (F_LEN(cmd) > 0) {   /* prepare to advance */
3177                         prev = cmd;
3178                         cmd = next_cmd(cmd);
3179                 }
3180         }
3181
3182 done:
3183         /*
3184          * Now copy stuff into the rule.
3185          * If we have a keep-state option, the first instruction
3186          * must be a PROBE_STATE (which is generated here).
3187          * If we have a LOG option, it was stored as the first command,
3188          * and now must be moved to the top of the action part.
3189          */
3190         dst = (ipfw_insn *)rule->cmd;
3191
3192         /*
3193          * First thing to write into the command stream is the match probability.
3194          */
3195         if (match_prob != 1) { /* 1 means always match */
3196                 dst->opcode = O_PROB;
3197                 dst->len = 2;
3198                 *((int32_t *)(dst+1)) = (int32_t)(match_prob * 0x7fffffff);
3199                 dst += dst->len;
3200         }
3201
3202         /*
3203          * generate O_PROBE_STATE if necessary
3204          */
3205         if (have_state && have_state->opcode != O_CHECK_STATE) {
3206                 fill_cmd(dst, O_PROBE_STATE, 0, 0);
3207                 dst = next_cmd(dst);
3208         }
3209         /*
3210          * copy all commands but O_LOG, O_KEEP_STATE, O_LIMIT
3211          */
3212         for (src = (ipfw_insn *)cmdbuf; src != cmd; src += i) {
3213                 i = F_LEN(src);
3214
3215                 switch (src->opcode) {
3216                 case O_LOG:
3217                 case O_KEEP_STATE:
3218                 case O_LIMIT:
3219                         break;
3220                 default:
3221                         bcopy(src, dst, i * sizeof(u_int32_t));
3222                         dst += i;
3223                 }
3224         }
3225
3226         /*
3227          * put back the have_state command as last opcode
3228          */
3229         if (have_state && have_state->opcode != O_CHECK_STATE) {
3230                 i = F_LEN(have_state);
3231                 bcopy(have_state, dst, i * sizeof(u_int32_t));
3232                 dst += i;
3233         }
3234         /*
3235          * start action section
3236          */
3237         rule->act_ofs = dst - rule->cmd;
3238
3239         /*
3240          * put back O_LOG if necessary
3241          */
3242         src = (ipfw_insn *)cmdbuf;
3243         if ( src->opcode == O_LOG ) {
3244                 i = F_LEN(src);
3245                 bcopy(src, dst, i * sizeof(u_int32_t));
3246                 dst += i;
3247         }
3248         /*
3249          * copy all other actions
3250          */
3251         for (src = (ipfw_insn *)actbuf; src != action; src += i) {
3252                 i = F_LEN(src);
3253                 bcopy(src, dst, i * sizeof(u_int32_t));
3254                 dst += i;
3255         }
3256
3257         rule->cmd_len = (u_int32_t *)dst - (u_int32_t *)(rule->cmd);
3258         i = (void *)dst - (void *)rule;
3259         if (getsockopt(s, IPPROTO_IP, IP_FW_ADD, rule, &i) == -1)
3260                 err(EX_UNAVAILABLE, "getsockopt(%s)", "IP_FW_ADD");
3261         if (!do_quiet)
3262                 show_ipfw(rule, 10, 10);
3263 }
3264
3265 static void
3266 zero(int ac, char *av[])
3267 {
3268         int rulenum;
3269         int failed = EX_OK;
3270
3271         av++; ac--;
3272
3273         if (!ac) {
3274                 /* clear all entries */
3275                 if (setsockopt(s, IPPROTO_IP, IP_FW_ZERO, NULL, 0) < 0)
3276                         err(EX_UNAVAILABLE, "setsockopt(%s)", "IP_FW_ZERO");
3277                 if (!do_quiet)
3278                         printf("Accounting cleared.\n");
3279
3280                 return;
3281         }
3282
3283         while (ac) {
3284                 /* Rule number */
3285                 if (isdigit(**av)) {
3286                         rulenum = atoi(*av);
3287                         av++;
3288                         ac--;
3289                         if (setsockopt(s, IPPROTO_IP,
3290                             IP_FW_ZERO, &rulenum, sizeof rulenum)) {
3291                                 warn("rule %u: setsockopt(IP_FW_ZERO)",
3292                                     rulenum);
3293                                 failed = EX_UNAVAILABLE;
3294                         } else if (!do_quiet)
3295                                 printf("Entry %d cleared\n", rulenum);
3296                 } else {
3297                         errx(EX_USAGE, "invalid rule number ``%s''", *av);
3298                 }
3299         }
3300         if (failed != EX_OK)
3301                 exit(failed);
3302 }
3303
3304 static void
3305 resetlog(int ac, char *av[])
3306 {
3307         int rulenum;
3308         int failed = EX_OK;
3309
3310         av++; ac--;
3311
3312         if (!ac) {
3313                 /* clear all entries */
3314                 if (setsockopt(s, IPPROTO_IP, IP_FW_RESETLOG, NULL, 0) < 0)
3315                         err(EX_UNAVAILABLE, "setsockopt(IP_FW_RESETLOG)");
3316                 if (!do_quiet)
3317                         printf("Logging counts reset.\n");
3318
3319                 return;
3320         }
3321
3322         while (ac) {
3323                 /* Rule number */
3324                 if (isdigit(**av)) {
3325                         rulenum = atoi(*av);
3326                         av++;
3327                         ac--;
3328                         if (setsockopt(s, IPPROTO_IP,
3329                             IP_FW_RESETLOG, &rulenum, sizeof rulenum)) {
3330                                 warn("rule %u: setsockopt(IP_FW_RESETLOG)",
3331                                     rulenum);
3332                                 failed = EX_UNAVAILABLE;
3333                         } else if (!do_quiet)
3334                                 printf("Entry %d logging count reset\n",
3335                                     rulenum);
3336                 } else {
3337                         errx(EX_DATAERR, "invalid rule number ``%s''", *av);
3338                 }
3339         }
3340         if (failed != EX_OK)
3341                 exit(failed);
3342 }
3343
3344 static void
3345 flush(void)
3346 {
3347         int cmd = do_pipe ? IP_DUMMYNET_FLUSH : IP_FW_FLUSH;
3348
3349         if (!do_force && !do_quiet) { /* need to ask user */
3350                 int c;
3351
3352                 printf("Are you sure? [yn] ");
3353                 fflush(stdout);
3354                 do {
3355                         c = toupper(getc(stdin));
3356                         while (c != '\n' && getc(stdin) != '\n')
3357                                 if (feof(stdin))
3358                                         return; /* and do not flush */
3359                 } while (c != 'Y' && c != 'N');
3360                 printf("\n");
3361                 if (c == 'N')   /* user said no */
3362                         return;
3363         }
3364         if (setsockopt(s, IPPROTO_IP, cmd, NULL, 0) < 0)
3365                 err(EX_UNAVAILABLE, "setsockopt(IP_%s_FLUSH)",
3366                     do_pipe ? "DUMMYNET" : "FW");
3367         if (!do_quiet)
3368                 printf("Flushed all %s.\n", do_pipe ? "pipes" : "rules");
3369 }
3370
3371 static int
3372 ipfw_main(int ac, char **av)
3373 {
3374         int ch;
3375
3376         if (ac == 1)
3377                 show_usage();
3378
3379         /* Set the force flag for non-interactive processes */
3380         do_force = !isatty(STDIN_FILENO);
3381
3382         optind = optreset = 1;
3383         while ((ch = getopt(ac, av, "hs:acdefNqStv")) != -1)
3384                 switch (ch) {
3385                 case 'h': /* help */
3386                         help();
3387                         break;  /* NOTREACHED */
3388
3389                 case 's': /* sort */
3390                         do_sort = atoi(optarg);
3391                         break;
3392                 case 'a':
3393                         do_acct = 1;
3394                         break;
3395                 case 'c':
3396                         do_compact = 1;
3397                         break;
3398                 case 'd':
3399                         do_dynamic = 1;
3400                         break;
3401                 case 'e':
3402                         do_expired = 1;
3403                         break;
3404                 case 'f':
3405                         do_force = 1;
3406                         break;
3407                 case 'N':
3408                         do_resolv = 1;
3409                         break;
3410                 case 'q':
3411                         do_quiet = 1;
3412                         break;
3413                 case 'S':
3414                         show_sets = 1;
3415                         break;
3416                 case 't':
3417                         do_time = 1;
3418                         break;
3419                 case 'v': /* verbose */
3420                         verbose++;
3421                         break;
3422                 default:
3423                         show_usage();
3424                 }
3425
3426         ac -= optind;
3427         av += optind;
3428         NEED1("bad arguments, for usage summary ``ipfw''");
3429
3430         /*
3431          * optional: pipe or queue
3432          */
3433         if (!strncmp(*av, "pipe", strlen(*av))) {
3434                 do_pipe = 1;
3435                 ac--;
3436                 av++;
3437         } else if (!strncmp(*av, "queue", strlen(*av))) {
3438                 do_pipe = 2;
3439                 ac--;
3440                 av++;
3441         }
3442         NEED1("missing command");
3443
3444         /*
3445          * for pipes and queues we normally say 'pipe NN config'
3446          * but the code is easier to parse as 'pipe config NN'
3447          * so we swap the two arguments.
3448          */
3449         if (do_pipe > 0 && ac > 1 && *av[0] >= '0' && *av[0] <= '9') {
3450                 char *p = av[0];
3451                 av[0] = av[1];
3452                 av[1] = p;
3453         }
3454         if (!strncmp(*av, "add", strlen(*av)))
3455                 add(ac, av);
3456         else if (do_pipe && !strncmp(*av, "config", strlen(*av)))
3457                 config_pipe(ac, av);
3458         else if (!strncmp(*av, "delete", strlen(*av)))
3459                 delete(ac, av);
3460         else if (!strncmp(*av, "flush", strlen(*av)))
3461                 flush();
3462         else if (!strncmp(*av, "zero", strlen(*av)))
3463                 zero(ac, av);
3464         else if (!strncmp(*av, "resetlog", strlen(*av)))
3465                 resetlog(ac, av);
3466         else if (!strncmp(*av, "print", strlen(*av)) ||
3467                  !strncmp(*av, "list", strlen(*av)))
3468                 list(ac, av);
3469         else if (!strncmp(*av, "enable", strlen(*av)))
3470                 sysctl_handler(ac, av, 1);
3471         else if (!strncmp(*av, "disable", strlen(*av)))
3472                 sysctl_handler(ac, av, 0);
3473         else if (!strncmp(*av, "set", strlen(*av)))
3474                 sets_handler(ac, av);
3475         else if (!strncmp(*av, "show", strlen(*av))) {
3476                 do_acct++;
3477                 list(ac, av);
3478         } else
3479                 errx(EX_USAGE, "bad command `%s'", *av);
3480         return 0;
3481 }
3482
3483
3484 static void
3485 ipfw_readfile(int ac, char *av[])
3486 {
3487 #define MAX_ARGS        32
3488 #define WHITESP         " \t\f\v\n\r"
3489         char    buf[BUFSIZ];
3490         char    *a, *p, *args[MAX_ARGS], *cmd = NULL;
3491         char    linename[10];
3492         int     i=0, lineno=0, qflag=0, pflag=0, status;
3493         FILE    *f = NULL;
3494         pid_t   preproc = 0;
3495         int     c;
3496
3497         while ((c = getopt(ac, av, "D:U:p:q")) != -1)
3498                 switch(c) {
3499                 case 'D':
3500                         if (!pflag)
3501                                 errx(EX_USAGE, "-D requires -p");
3502                         if (i > MAX_ARGS - 2)
3503                                 errx(EX_USAGE,
3504                                      "too many -D or -U options");
3505                         args[i++] = "-D";
3506                         args[i++] = optarg;
3507                         break;
3508
3509                 case 'U':
3510                         if (!pflag)
3511                                 errx(EX_USAGE, "-U requires -p");
3512                         if (i > MAX_ARGS - 2)
3513                                 errx(EX_USAGE,
3514                                      "too many -D or -U options");
3515                         args[i++] = "-U";
3516                         args[i++] = optarg;
3517                         break;
3518
3519                 case 'p':
3520                         pflag = 1;
3521                         cmd = optarg;
3522                         args[0] = cmd;
3523                         i = 1;
3524                         break;
3525
3526                 case 'q':
3527                         qflag = 1;
3528                         break;
3529
3530                 default:
3531                         errx(EX_USAGE, "bad arguments, for usage"
3532                              " summary ``ipfw''");
3533                 }
3534
3535         av += optind;
3536         ac -= optind;
3537         if (ac != 1)
3538                 errx(EX_USAGE, "extraneous filename arguments");
3539
3540         if ((f = fopen(av[0], "r")) == NULL)
3541                 err(EX_UNAVAILABLE, "fopen: %s", av[0]);
3542
3543         if (pflag) {
3544                 /* pipe through preprocessor (cpp or m4) */
3545                 int pipedes[2];
3546
3547                 args[i] = NULL;
3548
3549                 if (pipe(pipedes) == -1)
3550                         err(EX_OSERR, "cannot create pipe");
3551
3552                 switch((preproc = fork())) {
3553                 case -1:
3554                         err(EX_OSERR, "cannot fork");
3555
3556                 case 0:
3557                         /* child */
3558                         if (dup2(fileno(f), 0) == -1
3559                             || dup2(pipedes[1], 1) == -1)
3560                                 err(EX_OSERR, "dup2()");
3561                         fclose(f);
3562                         close(pipedes[1]);
3563                         close(pipedes[0]);
3564                         execvp(cmd, args);
3565                         err(EX_OSERR, "execvp(%s) failed", cmd);
3566
3567                 default:
3568                         /* parent */
3569                         fclose(f);
3570                         close(pipedes[1]);
3571                         if ((f = fdopen(pipedes[0], "r")) == NULL) {
3572                                 int savederrno = errno;
3573
3574                                 kill(preproc, SIGTERM);
3575                                 errno = savederrno;
3576                                 err(EX_OSERR, "fdopen()");
3577                         }
3578                 }
3579         }
3580
3581         while (fgets(buf, BUFSIZ, f)) {
3582                 lineno++;
3583                 sprintf(linename, "Line %d", lineno);
3584                 args[0] = linename;
3585
3586                 if (*buf == '#')
3587                         continue;
3588                 if ((p = strchr(buf, '#')) != NULL)
3589                         *p = '\0';
3590                 i = 1;
3591                 if (qflag)
3592                         args[i++] = "-q";
3593                 for (a = strtok(buf, WHITESP);
3594                     a && i < MAX_ARGS; a = strtok(NULL, WHITESP), i++)
3595                         args[i] = a;
3596                 if (i == (qflag? 2: 1))
3597                         continue;
3598                 if (i == MAX_ARGS)
3599                         errx(EX_USAGE, "%s: too many arguments",
3600                             linename);
3601                 args[i] = NULL;
3602
3603                 ipfw_main(i, args);
3604         }
3605         fclose(f);
3606         if (pflag) {
3607                 if (waitpid(preproc, &status, 0) == -1)
3608                         errx(EX_OSERR, "waitpid()");
3609                 if (WIFEXITED(status) && WEXITSTATUS(status) != EX_OK)
3610                         errx(EX_UNAVAILABLE,
3611                             "preprocessor exited with status %d",
3612                             WEXITSTATUS(status));
3613                 else if (WIFSIGNALED(status))
3614                         errx(EX_UNAVAILABLE,
3615                             "preprocessor exited with signal %d",
3616                             WTERMSIG(status));
3617         }
3618 }
3619
3620 int
3621 main(int ac, char *av[])
3622 {
3623         s = socket(AF_INET, SOCK_RAW, IPPROTO_RAW);
3624         if (s < 0)
3625                 err(EX_UNAVAILABLE, "socket");
3626
3627         /*
3628          * If the last argument is an absolute pathname, interpret it
3629          * as a file to be preprocessed.
3630          */
3631
3632         if (ac > 1 && av[ac - 1][0] == '/' && access(av[ac - 1], R_OK) == 0)
3633                 ipfw_readfile(ac, av);
3634         else
3635                 ipfw_main(ac, av);
3636         return EX_OK;
3637 }