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  * $DragonFly: src/sbin/ipfw/ipfw2.c,v 1.12 2007/11/05 08:58:35 sephe Exp $
  22  */
  23
  24 #include <sys/param.h>
  25 #include <sys/mbuf.h>
  26 #include <sys/socket.h>
  27 #include <sys/sockio.h>
  28 #include <sys/sysctl.h>
  29 #include <sys/time.h>
  30 #include <sys/wait.h>
  31
  32 #include <ctype.h>
  33 #include <err.h>
  34 #include <errno.h>
  35 #include <grp.h>
  36 #include <limits.h>
  37 #include <netdb.h>
  38 #include <pwd.h>
  39 #include <signal.h>
  40 #include <stdio.h>
  41 #include <stdlib.h>
  42 #include <stdarg.h>
  43 #include <string.h>
  44 #include <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         { "at",         0x809b },
 163         { "atalk",      0x809b },
 164         { "aarp",       0x80f3 },
 165         { "pppoe_disc", 0x8863 },
 166         { "pppoe_sess", 0x8864 },
 167         { "ipx_8022",   0x00E0 },
 168         { "ipx_8023",   0x0000 },
 169         { "ipx_ii",     0x8137 },
 170         { "ipx_snap",   0x8137 },
 171         { "ipx",        0x8137 },
 172         { "ns",         0x0600 },
 173         { NULL,         0 }
 174 };
 175
 176 static void show_usage(void);
 177
 178 enum tokens {
 179         TOK_NULL=0,
 180
 181         TOK_OR,
 182         TOK_NOT,
 183         TOK_STARTBRACE,
 184         TOK_ENDBRACE,
 185
 186         TOK_ACCEPT,
 187         TOK_COUNT,
 188         TOK_PIPE,
 189         TOK_QUEUE,
 190         TOK_DIVERT,
 191         TOK_TEE,
 192         TOK_FORWARD,
 193         TOK_SKIPTO,
 194         TOK_DENY,
 195         TOK_REJECT,
 196         TOK_RESET,
 197         TOK_UNREACH,
 198         TOK_CHECKSTATE,
 199
 200         TOK_UID,
 201         TOK_GID,
 202         TOK_IN,
 203         TOK_LIMIT,
 204         TOK_KEEPSTATE,
 205         TOK_LAYER2,
 206         TOK_OUT,
 207         TOK_XMIT,
 208         TOK_RECV,
 209         TOK_VIA,
 210         TOK_FRAG,
 211         TOK_IPOPTS,
 212         TOK_IPLEN,
 213         TOK_IPID,
 214         TOK_IPPRECEDENCE,
 215         TOK_IPTOS,
 216         TOK_IPTTL,
 217         TOK_IPVER,
 218         TOK_ESTAB,
 219         TOK_SETUP,
 220         TOK_TCPFLAGS,
 221         TOK_TCPOPTS,
 222         TOK_TCPSEQ,
 223         TOK_TCPACK,
 224         TOK_TCPWIN,
 225         TOK_ICMPTYPES,
 226         TOK_MAC,
 227         TOK_MACTYPE,
 228
 229         TOK_PLR,
 230         TOK_NOERROR,
 231         TOK_BUCKETS,
 232         TOK_DSTIP,
 233         TOK_SRCIP,
 234         TOK_DSTPORT,
 235         TOK_SRCPORT,
 236         TOK_ALL,
 237         TOK_MASK,
 238         TOK_BW,
 239         TOK_DELAY,
 240         TOK_RED,
 241         TOK_GRED,
 242         TOK_DROPTAIL,
 243         TOK_PROTO,
 244         TOK_WEIGHT,
 245 };
 246
 247 struct _s_x dummynet_params[] = {
 248         { "plr",                TOK_PLR },
 249         { "noerror",            TOK_NOERROR },
 250         { "buckets",            TOK_BUCKETS },
 251         { "dst-ip",             TOK_DSTIP },
 252         { "src-ip",             TOK_SRCIP },
 253         { "dst-port",           TOK_DSTPORT },
 254         { "src-port",           TOK_SRCPORT },
 255         { "proto",              TOK_PROTO },
 256         { "weight",             TOK_WEIGHT },
 257         { "all",                TOK_ALL },
 258         { "mask",               TOK_MASK },
 259         { "droptail",           TOK_DROPTAIL },
 260         { "red",                TOK_RED },
 261         { "gred",               TOK_GRED },
 262         { "bw",                 TOK_BW },
 263         { "bandwidth",          TOK_BW },
 264         { "delay",              TOK_DELAY },
 265         { "pipe",               TOK_PIPE },
 266         { "queue",              TOK_QUEUE },
 267         { "dummynet-params",    TOK_NULL },
 268         { NULL, 0 }
 269 };
 270
 271 struct _s_x rule_actions[] = {
 272         { "accept",             TOK_ACCEPT },
 273         { "pass",               TOK_ACCEPT },
 274         { "allow",              TOK_ACCEPT },
 275         { "permit",             TOK_ACCEPT },
 276         { "count",              TOK_COUNT },
 277         { "pipe",               TOK_PIPE },
 278         { "queue",              TOK_QUEUE },
 279         { "divert",             TOK_DIVERT },
 280         { "tee",                TOK_TEE },
 281         { "fwd",                TOK_FORWARD },
 282         { "forward",            TOK_FORWARD },
 283         { "skipto",             TOK_SKIPTO },
 284         { "deny",               TOK_DENY },
 285         { "drop",               TOK_DENY },
 286         { "reject",             TOK_REJECT },
 287         { "reset",              TOK_RESET },
 288         { "unreach",            TOK_UNREACH },
 289         { "check-state",        TOK_CHECKSTATE },
 290         { NULL,                 TOK_NULL },
 291         { NULL, 0 }
 292 };
 293
 294 struct _s_x rule_options[] = {
 295         { "uid",                TOK_UID },
 296         { "gid",                TOK_GID },
 297         { "in",                 TOK_IN },
 298         { "limit",              TOK_LIMIT },
 299         { "keep-state",         TOK_KEEPSTATE },
 300         { "layer2",             TOK_LAYER2 },
 301         { "out",                TOK_OUT },
 302         { "xmit",               TOK_XMIT },
 303         { "recv",               TOK_RECV },
 304         { "via",                TOK_VIA },
 305         { "fragment",           TOK_FRAG },
 306         { "frag",               TOK_FRAG },
 307         { "ipoptions",          TOK_IPOPTS },
 308         { "ipopts",             TOK_IPOPTS },
 309         { "iplen",              TOK_IPLEN },
 310         { "ipid",               TOK_IPID },
 311         { "ipprecedence",       TOK_IPPRECEDENCE },
 312         { "iptos",              TOK_IPTOS },
 313         { "ipttl",              TOK_IPTTL },
 314         { "ipversion",          TOK_IPVER },
 315         { "ipver",              TOK_IPVER },
 316         { "estab",              TOK_ESTAB },
 317         { "established",        TOK_ESTAB },
 318         { "setup",              TOK_SETUP },
 319         { "tcpflags",           TOK_TCPFLAGS },
 320         { "tcpflgs",            TOK_TCPFLAGS },
 321         { "tcpoptions",         TOK_TCPOPTS },
 322         { "tcpopts",            TOK_TCPOPTS },
 323         { "tcpseq",             TOK_TCPSEQ },
 324         { "tcpack",             TOK_TCPACK },
 325         { "tcpwin",             TOK_TCPWIN },
 326         { "icmptype",           TOK_ICMPTYPES },
 327         { "icmptypes",          TOK_ICMPTYPES },
 328         { "dst-ip",             TOK_DSTIP },
 329         { "src-ip",             TOK_SRCIP },
 330         { "dst-port",           TOK_DSTPORT },
 331         { "src-port",           TOK_SRCPORT },
 332         { "proto",              TOK_PROTO },
 333         { "MAC",                TOK_MAC },
 334         { "mac",                TOK_MAC },
 335         { "mac-type",           TOK_MACTYPE },
 336
 337         { "not",                TOK_NOT },              /* pseudo option */
 338         { "!", /* escape ? */   TOK_NOT },              /* pseudo option */
 339         { "or",                 TOK_OR },               /* pseudo option */
 340         { "|", /* escape */     TOK_OR },               /* pseudo option */
 341         { "{",                  TOK_STARTBRACE },       /* pseudo option */
 342         { "(",                  TOK_STARTBRACE },       /* pseudo option */
 343         { "}",                  TOK_ENDBRACE },         /* pseudo option */
 344         { ")",                  TOK_ENDBRACE },         /* pseudo option */
 345         { NULL,                 TOK_NULL },
 346         { NULL, 0 }
 347 };
 348
 349 /**
 350  * match_token takes a table and a string, returns the value associated
 351  * with the string (0 meaning an error in most cases)
 352  */
 353 static int
 354 match_token(struct _s_x *table, char *string)
 355 {
 356         struct _s_x *pt;
 357         int i = strlen(string);
 358
 359         for (pt = table ; i && pt->s != NULL ; pt++)
 360                 if (strlen(pt->s) == i && !bcmp(string, pt->s, i))
 361                         return pt->x;
 362         return -1;
 363 };
 364
 365 static char *
 366 match_value(struct _s_x *p, u_int32_t value)
 367 {
 368         for (; p->s != NULL; p++)
 369                 if (p->x == value)
 370                         return p->s;
 371         return NULL;
 372 }
 373
 374 /*
 375  * prints one port, symbolic or numeric
 376  */
 377 static void
 378 print_port(int proto, u_int16_t port)
 379 {
 380
 381         if (proto == IPPROTO_ETHERTYPE) {
 382                 char *s;
 383
 384                 if (do_resolv && (s = match_value(ether_types, port)) )
 385                         printf("%s", s);
 386                 else
 387                         printf("0x%04x", port);
 388         } else {
 389                 struct servent *se = NULL;
 390                 if (do_resolv) {
 391                         struct protoent *pe = getprotobynumber(proto);
 392
 393                         se = getservbyport(htons(port), pe ? pe->p_name : NULL);
 394                 }
 395                 if (se)
 396                         printf("%s", se->s_name);
 397                 else
 398                         printf("%d", port);
 399         }
 400 }
 401
 402 /*
 403  * print the values in a list of ports
 404  * XXX todo: add support for mask.
 405  */
 406 static void
 407 print_newports(ipfw_insn_u16 *cmd, int proto, int opcode)
 408 {
 409         u_int16_t *p = cmd->ports;
 410         int i;
 411         char *sep= " ";
 412
 413         if (cmd->o.len & F_NOT)
 414                 printf(" not");
 415         if (opcode != 0)
 416                 printf ("%s", opcode == O_MAC_TYPE ? " mac-type" :
 417                     (opcode == O_IP_DSTPORT ? " dst-port" : " src-port"));
 418         for (i = F_LEN((ipfw_insn *)cmd) - 1; i > 0; i--, p += 2) {
 419                 printf(sep);
 420                 print_port(proto, p[0]);
 421                 if (p[0] != p[1]) {
 422                         printf("-");
 423                         print_port(proto, p[1]);
 424                 }
 425                 sep = ",";
 426         }
 427 }
 428
 429 /*
 430  * Like strtol, but also translates service names into port numbers
 431  * for some protocols.
 432  * In particular:
 433  *      proto == -1 disables the protocol check;
 434  *      proto == IPPROTO_ETHERTYPE looks up an internal table
 435  *      proto == <some value in /etc/protocols> matches the values there.
 436  * Returns *end == s in case the parameter is not found.
 437  */
 438 static int
 439 strtoport(char *s, char **end, int base, int proto)
 440 {
 441         char *p, *buf;
 442         char *s1;
 443         int i;
 444
 445         *end = s;               /* default - not found */
 446         if ( *s == '\0')
 447                 return 0;       /* not found */
 448
 449         if (isdigit(*s))
 450                 return strtol(s, end, base);
 451
 452         /*
 453          * find separator. '\\' escapes the next char.
 454          */
 455         for (s1 = s; *s1 && (isalnum(*s1) || *s1 == '\\') ; s1++)
 456                 if (*s1 == '\\' && s1[1] != '\0')
 457                         s1++;
 458
 459         buf = malloc(s1 - s + 1);
 460         if (buf == NULL)
 461                 return 0;
 462
 463         /*
 464          * copy into a buffer skipping backslashes
 465          */
 466         for (p = s, i = 0; p != s1 ; p++)
 467                 if ( *p != '\\')
 468                         buf[i++] = *p;
 469         buf[i++] = '\0';
 470
 471         if (proto == IPPROTO_ETHERTYPE) {
 472                 i = match_token(ether_types, buf);
 473                 free(buf);
 474                 if (i != -1) {  /* found */
 475                         *end = s1;
 476                         return i;
 477                 }
 478         } else {
 479                 struct protoent *pe = NULL;
 480                 struct servent *se;
 481
 482                 if (proto != 0)
 483                         pe = getprotobynumber(proto);
 484                 setservent(1);
 485                 se = getservbyname(buf, pe ? pe->p_name : NULL);
 486                 free(buf);
 487                 if (se != NULL) {
 488                         *end = s1;
 489                         return ntohs(se->s_port);
 490                 }
 491         }
 492         return 0;       /* not found */
 493 }
 494
 495 /*
 496  * fill the body of the command with the list of port ranges.
 497  * At the moment it only understands numeric ranges.
 498  */
 499 static int
 500 fill_newports(ipfw_insn_u16 *cmd, char *av, int proto)
 501 {
 502         u_int16_t *p = cmd->ports;
 503         int i = 0;
 504         char *s = av;
 505
 506         while (*s) {
 507                 u_int16_t a, b;
 508
 509                 a = strtoport(av, &s, 0, proto);
 510                 if (s == av) /* no parameter */
 511                         break;
 512                 if (*s == '-') { /* a range */
 513                         av = s+1;
 514                         b = strtoport(av, &s, 0, proto);
 515                         if (s == av) /* no parameter */
 516                                 break;
 517                         p[0] = a;
 518                         p[1] = b;
 519                 } else if (*s == ',' || *s == '\0' ) {
 520                         p[0] = p[1] = a;
 521                 } else {        /* invalid separator */
 522                         errx(EX_DATAERR, "invalid separator <%c> in <%s>\n",
 523                                 *s, av);
 524                 }
 525                 i++;
 526                 p += 2;
 527                 av = s+1;
 528         }
 529         if (i > 0) {
 530                 if (i+1 > F_LEN_MASK)
 531                         errx(EX_DATAERR, "too many ports/ranges\n");
 532                 cmd->o.len |= i+1; /* leave F_NOT and F_OR untouched */
 533         }
 534         return i;
 535 }
 536
 537 static struct _s_x icmpcodes[] = {
 538       { "net",                  ICMP_UNREACH_NET },
 539       { "host",                 ICMP_UNREACH_HOST },
 540       { "protocol",             ICMP_UNREACH_PROTOCOL },
 541       { "port",                 ICMP_UNREACH_PORT },
 542       { "needfrag",             ICMP_UNREACH_NEEDFRAG },
 543       { "srcfail",              ICMP_UNREACH_SRCFAIL },
 544       { "net-unknown",          ICMP_UNREACH_NET_UNKNOWN },
 545       { "host-unknown",         ICMP_UNREACH_HOST_UNKNOWN },
 546       { "isolated",             ICMP_UNREACH_ISOLATED },
 547       { "net-prohib",           ICMP_UNREACH_NET_PROHIB },
 548       { "host-prohib",          ICMP_UNREACH_HOST_PROHIB },
 549       { "tosnet",               ICMP_UNREACH_TOSNET },
 550       { "toshost",              ICMP_UNREACH_TOSHOST },
 551       { "filter-prohib",        ICMP_UNREACH_FILTER_PROHIB },
 552       { "host-precedence",      ICMP_UNREACH_HOST_PRECEDENCE },
 553       { "precedence-cutoff",    ICMP_UNREACH_PRECEDENCE_CUTOFF },
 554       { NULL, 0 }
 555 };
 556
 557 static void
 558 fill_reject_code(u_short *codep, char *str)
 559 {
 560         int val;
 561         char *s;
 562
 563         val = strtoul(str, &s, 0);
 564         if (s == str || *s != '\0' || val >= 0x100)
 565                 val = match_token(icmpcodes, str);
 566         if (val < 0)
 567                 errx(EX_DATAERR, "unknown ICMP unreachable code ``%s''", str);
 568         *codep = val;
 569         return;
 570 }
 571
 572 static void
 573 print_reject_code(u_int16_t code)
 574 {
 575         char *s = match_value(icmpcodes, code);
 576
 577         if (s != NULL)
 578                 printf("unreach %s", s);
 579         else
 580                 printf("unreach %u", code);
 581 }
 582
 583 /*
 584  * Returns the number of bits set (from left) in a contiguous bitmask,
 585  * or -1 if the mask is not contiguous.
 586  * XXX this needs a proper fix.
 587  * This effectively works on masks in big-endian (network) format.
 588  * when compiled on little endian architectures.
 589  *
 590  * First bit is bit 7 of the first byte -- note, for MAC addresses,
 591  * the first bit on the wire is bit 0 of the first byte.
 592  * len is the max length in bits.
 593  */
 594 static int
 595 contigmask(u_char *p, int len)
 596 {
 597         int i, n;
 598         for (i=0; i<len ; i++)
 599                 if ( (p[i/8] & (1 << (7 - (i%8)))) == 0) /* first bit unset */
 600                         break;
 601         for (n=i+1; n < len; n++)
 602                 if ( (p[n/8] & (1 << (7 - (n%8)))) != 0)
 603                         return -1; /* mask not contiguous */
 604         return i;
 605 }
 606
 607 /*
 608  * print flags set/clear in the two bitmasks passed as parameters.
 609  * There is a specialized check for f_tcpflags.
 610  */
 611 static void
 612 print_flags(char *name, ipfw_insn *cmd, struct _s_x *list)
 613 {
 614         char *comma="";
 615         int i;
 616         u_char set = cmd->arg1 & 0xff;
 617         u_char clear = (cmd->arg1 >> 8) & 0xff;
 618
 619         if (list == f_tcpflags && set == TH_SYN && clear == TH_ACK) {
 620                 printf(" setup");
 621                 return;
 622         }
 623
 624         printf(" %s ", name);
 625         for (i=0; list[i].x != 0; i++) {
 626                 if (set & list[i].x) {
 627                         set &= ~list[i].x;
 628                         printf("%s%s", comma, list[i].s);
 629                         comma = ",";
 630                 }
 631                 if (clear & list[i].x) {
 632                         clear &= ~list[i].x;
 633                         printf("%s!%s", comma, list[i].s);
 634                         comma = ",";
 635                 }
 636         }
 637 }
 638
 639 /*
 640  * Print the ip address contained in a command.
 641  */
 642 static void
 643 print_ip(ipfw_insn_ip *cmd, char *s)
 644 {
 645         struct hostent *he = NULL;
 646         int mb;
 647
 648         printf("%s%s ", cmd->o.len & F_NOT ? " not": "", s);
 649
 650         if (cmd->o.opcode == O_IP_SRC_ME || cmd->o.opcode == O_IP_DST_ME) {
 651                 printf("me");
 652                 return;
 653         }
 654         if (cmd->o.opcode == O_IP_SRC_SET || cmd->o.opcode == O_IP_DST_SET) {
 655                 u_int32_t x, *d;
 656                 int i;
 657                 char comma = '{';
 658
 659                 x = cmd->o.arg1 - 1;
 660                 x = htonl( ~x );
 661                 cmd->addr.s_addr = htonl(cmd->addr.s_addr);
 662                 printf("%s/%d", inet_ntoa(cmd->addr),
 663                         contigmask((u_char *)&x, 32));
 664                 x = cmd->addr.s_addr = htonl(cmd->addr.s_addr);
 665                 x &= 0xff; /* base */
 666                 d = (u_int32_t *)&(cmd->mask);
 667                 for (i=0; i < cmd->o.arg1; i++)
 668                         if (d[ i/32] & (1<<(i & 31))) {
 669                                 printf("%c%d", comma, i+x);
 670                                 comma = ',';
 671                         }
 672                 printf("}");
 673                 return;
 674         }
 675         if (cmd->o.opcode == O_IP_SRC || cmd->o.opcode == O_IP_DST)
 676                 mb = 32;
 677         else
 678                 mb = contigmask((u_char *)&(cmd->mask.s_addr), 32);
 679         if (mb == 32 && do_resolv)
 680                 he = gethostbyaddr((char *)&(cmd->addr.s_addr),
 681                     sizeof(u_long), AF_INET);
 682         if (he != NULL)         /* resolved to name */
 683                 printf("%s", he->h_name);
 684         else if (mb == 0)       /* any */
 685                 printf("any");
 686         else {          /* numeric IP followed by some kind of mask */
 687                 printf("%s", inet_ntoa(cmd->addr));
 688                 if (mb < 0)
 689                         printf(":%s", inet_ntoa(cmd->mask));
 690                 else if (mb < 32)
 691                         printf("/%d", mb);
 692         }
 693 }
 694
 695 /*
 696  * prints a MAC address/mask pair
 697  */
 698 static void
 699 print_mac(u_char *addr, u_char *mask)
 700 {
 701         int l = contigmask(mask, 48);
 702
 703         if (l == 0)
 704                 printf(" any");
 705         else {
 706                 printf(" %02x:%02x:%02x:%02x:%02x:%02x",
 707                     addr[0], addr[1], addr[2], addr[3], addr[4], addr[5]);
 708                 if (l == -1)
 709                         printf("&%02x:%02x:%02x:%02x:%02x:%02x",
 710                             mask[0], mask[1], mask[2],
 711                             mask[3], mask[4], mask[5]);
 712                 else if (l < 48)
 713                         printf("/%d", l);
 714         }
 715 }
 716
 717 static void
 718 fill_icmptypes(ipfw_insn_u32 *cmd, char *av)
 719 {
 720         u_int8_t type;
 721
 722         cmd->d[0] = 0;
 723         while (*av) {
 724                 if (*av == ',')
 725                         av++;
 726
 727                 type = strtoul(av, &av, 0);
 728
 729                 if (*av != ',' && *av != '\0')
 730                         errx(EX_DATAERR, "invalid ICMP type");
 731
 732                 if (type > 31)
 733                         errx(EX_DATAERR, "ICMP type out of range");
 734
 735                 cmd->d[0] |= 1 << type;
 736         }
 737         cmd->o.opcode = O_ICMPTYPE;
 738         cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32);
 739 }
 740
 741 static void
 742 print_icmptypes(ipfw_insn_u32 *cmd)
 743 {
 744         int i;
 745         char sep= ' ';
 746
 747         printf(" icmptypes");
 748         for (i = 0; i < 32; i++) {
 749                 if ( (cmd->d[0] & (1 << (i))) == 0)
 750                         continue;
 751                 printf("%c%d", sep, i);
 752                 sep = ',';
 753         }
 754 }
 755
 756 /*
 757  * show_ipfw() prints the body of an ipfw rule.
 758  * Because the standard rule has at least proto src_ip dst_ip, we use
 759  * a helper function to produce these entries if not provided explicitly.
 760  * The first argument is the list of fields we have, the second is
 761  * the list of fields we want to be printed.
 762  *
 763  * Special cases if we have provided a MAC header:
 764  *   + if the rule does not contain IP addresses/ports, do not print them;
 765  *   + if the rule does not contain an IP proto, print "all" instead of "ip";
 766  *
 767  * Once we have 'have_options', IP header fields are printed as options.
 768  */
 769 #define HAVE_PROTO      0x0001
 770 #define HAVE_SRCIP      0x0002
 771 #define HAVE_DSTIP      0x0004
 772 #define HAVE_MAC        0x0008
 773 #define HAVE_MACTYPE    0x0010
 774 #define HAVE_OPTIONS    0x8000
 775
 776 #define HAVE_IP         (HAVE_PROTO | HAVE_SRCIP | HAVE_DSTIP)
 777 static void
 778 show_prerequisites(int *flags, int want, int cmd)
 779 {
 780         if ( (*flags & HAVE_IP) == HAVE_IP)
 781                 *flags |= HAVE_OPTIONS;
 782
 783         if ( (*flags & (HAVE_MAC|HAVE_MACTYPE|HAVE_OPTIONS)) == HAVE_MAC &&
 784              cmd != O_MAC_TYPE) {
 785                 /*
 786                  * mac-type was optimized out by the compiler,
 787                  * restore it
 788                  */
 789                 printf(" any");
 790                 *flags |= HAVE_MACTYPE | HAVE_OPTIONS;
 791                 return;
 792         }
 793         if ( !(*flags & HAVE_OPTIONS)) {
 794                 if ( !(*flags & HAVE_PROTO) && (want & HAVE_PROTO))
 795                         printf(" ip");
 796                 if ( !(*flags & HAVE_SRCIP) && (want & HAVE_SRCIP))
 797                         printf(" from any");
 798                 if ( !(*flags & HAVE_DSTIP) && (want & HAVE_DSTIP))
 799                         printf(" to any");
 800         }
 801         *flags |= want;
 802 }
 803
 804 static void
 805 show_ipfw(struct ipfw_ioc_rule *rule, int pcwidth, int bcwidth)
 806 {
 807         static int twidth = 0;
 808         int l;
 809         ipfw_insn *cmd;
 810         int proto = 0;          /* default */
 811         int flags = 0;  /* prerequisites */
 812         ipfw_insn_log *logptr = NULL; /* set if we find an O_LOG */
 813         int or_block = 0;       /* we are in an or block */
 814
 815         u_int32_t set_disable = rule->set_disable;
 816
 817         if (set_disable & (1 << rule->set)) { /* disabled */
 818                 if (!show_sets)
 819                         return;
 820                 else
 821                         printf("# DISABLED ");
 822         }
 823         printf("%05u ", rule->rulenum);
 824
 825         if (do_acct)
 826                 printf("%*llu %*llu ", pcwidth, rule->pcnt, bcwidth,
 827                     rule->bcnt);
 828
 829         if (do_time) {
 830                 char timestr[30];
 831
 832                 if (twidth == 0) {
 833                         strcpy(timestr, ctime((time_t *)&twidth));
 834                         *strchr(timestr, '\n') = '\0';
 835                         twidth = strlen(timestr);
 836                 }
 837                 if (rule->timestamp) {
 838 #if _FreeBSD_version < 500000 /* XXX check */
 839 #define _long_to_time(x)        (time_t)(x)
 840 #endif
 841                         time_t t = _long_to_time(rule->timestamp);
 842
 843                         strcpy(timestr, ctime(&t));
 844                         *strchr(timestr, '\n') = '\0';
 845                         printf("%s ", timestr);
 846                 } else {
 847                         printf("%*s ", twidth, " ");
 848                 }
 849         }
 850
 851         if (show_sets)
 852                 printf("set %d ", rule->set);
 853
 854         /*
 855          * print the optional "match probability"
 856          */
 857         if (rule->cmd_len > 0) {
 858                 cmd = rule->cmd ;
 859                 if (cmd->opcode == O_PROB) {
 860                         ipfw_insn_u32 *p = (ipfw_insn_u32 *)cmd;
 861                         double d = 1.0 * p->d[0];
 862
 863                         d = (d / 0x7fffffff);
 864                         printf("prob %f ", d);
 865                 }
 866         }
 867
 868         /*
 869          * first print actions
 870          */
 871         for (l = rule->cmd_len - rule->act_ofs, cmd = ACTION_PTR(rule);
 872                         l > 0 ; l -= F_LEN(cmd), cmd += F_LEN(cmd)) {
 873                 switch(cmd->opcode) {
 874                 case O_CHECK_STATE:
 875                         printf("check-state");
 876                         flags = HAVE_IP; /* avoid printing anything else */
 877                         break;
 878
 879                 case O_ACCEPT:
 880                         printf("allow");
 881                         break;
 882
 883                 case O_COUNT:
 884                         printf("count");
 885                         break;
 886
 887                 case O_DENY:
 888                         printf("deny");
 889                         break;
 890
 891                 case O_REJECT:
 892                         if (cmd->arg1 == ICMP_REJECT_RST)
 893                                 printf("reset");
 894                         else if (cmd->arg1 == ICMP_UNREACH_HOST)
 895                                 printf("reject");
 896                         else
 897                                 print_reject_code(cmd->arg1);
 898                         break;
 899
 900                 case O_SKIPTO:
 901                         printf("skipto %u", cmd->arg1);
 902                         break;
 903
 904                 case O_PIPE:
 905                         printf("pipe %u", cmd->arg1);
 906                         break;
 907
 908                 case O_QUEUE:
 909                         printf("queue %u", cmd->arg1);
 910                         break;
 911
 912                 case O_DIVERT:
 913                         printf("divert %u", cmd->arg1);
 914                         break;
 915
 916                 case O_TEE:
 917                         printf("tee %u", cmd->arg1);
 918                         break;
 919
 920                 case O_FORWARD_IP:
 921                     {
 922                         ipfw_insn_sa *s = (ipfw_insn_sa *)cmd;
 923
 924                         printf("fwd %s", inet_ntoa(s->sa.sin_addr));
 925                         if (s->sa.sin_port)
 926                                 printf(",%d", s->sa.sin_port);
 927                     }
 928                         break;
 929
 930                 case O_LOG: /* O_LOG is printed last */
 931                         logptr = (ipfw_insn_log *)cmd;
 932                         break;
 933
 934                 default:
 935                         printf("** unrecognized action %d len %d",
 936                                 cmd->opcode, cmd->len);
 937                 }
 938         }
 939         if (logptr) {
 940                 if (logptr->max_log > 0)
 941                         printf(" log logamount %d", logptr->max_log);
 942                 else
 943                         printf(" log");
 944         }
 945
 946         /*
 947          * then print the body.
 948          */
 949         if (rule->usr_flags & IPFW_USR_F_NORULE) {
 950                 /* empty rules before options */
 951                 if (!do_compact)
 952                         printf(" ip from any to any");
 953                 flags |= HAVE_IP | HAVE_OPTIONS;
 954         }
 955
 956         for (l = rule->act_ofs, cmd = rule->cmd ;
 957                         l > 0 ; l -= F_LEN(cmd) , cmd += F_LEN(cmd)) {
 958                 /* useful alias */
 959                 ipfw_insn_u32 *cmd32 = (ipfw_insn_u32 *)cmd;
 960
 961                 show_prerequisites(&flags, 0, cmd->opcode);
 962
 963                 switch(cmd->opcode) {
 964                 case O_PROB:
 965                         break;  /* done already */
 966
 967                 case O_PROBE_STATE:
 968                         break; /* no need to print anything here */
 969
 970                 case O_MACADDR2: {
 971                         ipfw_insn_mac *m = (ipfw_insn_mac *)cmd;
 972
 973                         if ((cmd->len & F_OR) && !or_block)
 974                                 printf(" {");
 975                         if (cmd->len & F_NOT)
 976                                 printf(" not");
 977                         printf(" MAC");
 978                         flags |= HAVE_MAC;
 979                         print_mac( m->addr, m->mask);
 980                         print_mac( m->addr + 6, m->mask + 6);
 981                         }
 982                         break;
 983
 984                 case O_MAC_TYPE:
 985                         if ((cmd->len & F_OR) && !or_block)
 986                                 printf(" {");
 987                         print_newports((ipfw_insn_u16 *)cmd, IPPROTO_ETHERTYPE,
 988                                 (flags & HAVE_OPTIONS) ? cmd->opcode : 0);
 989                         flags |= HAVE_MAC | HAVE_MACTYPE | HAVE_OPTIONS;
 990                         break;
 991
 992                 case O_IP_SRC:
 993                 case O_IP_SRC_MASK:
 994                 case O_IP_SRC_ME:
 995                 case O_IP_SRC_SET:
 996                         show_prerequisites(&flags, HAVE_PROTO, 0);
 997                         if (!(flags & HAVE_SRCIP))
 998                                 printf(" from");
 999                         if ((cmd->len & F_OR) && !or_block)
1000                                 printf(" {");
1001                         print_ip((ipfw_insn_ip *)cmd,
1002                                 (flags & HAVE_OPTIONS) ? " src-ip" : "");
1003                         flags |= HAVE_SRCIP;
1004                         break;
1005
1006                 case O_IP_DST:
1007                 case O_IP_DST_MASK:
1008                 case O_IP_DST_ME:
1009                 case O_IP_DST_SET:
1010                         show_prerequisites(&flags, HAVE_PROTO|HAVE_SRCIP, 0);
1011                         if (!(flags & HAVE_DSTIP))
1012                                 printf(" to");
1013                         if ((cmd->len & F_OR) && !or_block)
1014                                 printf(" {");
1015                         print_ip((ipfw_insn_ip *)cmd,
1016                                 (flags & HAVE_OPTIONS) ? " dst-ip" : "");
1017                         flags |= HAVE_DSTIP;
1018                         break;
1019
1020                 case O_IP_DSTPORT:
1021                         show_prerequisites(&flags, HAVE_IP, 0);
1022                 case O_IP_SRCPORT:
1023                         show_prerequisites(&flags, HAVE_PROTO|HAVE_SRCIP, 0);
1024                         if ((cmd->len & F_OR) && !or_block)
1025                                 printf(" {");
1026                         print_newports((ipfw_insn_u16 *)cmd, proto,
1027                                 (flags & HAVE_OPTIONS) ? cmd->opcode : 0);
1028                         break;
1029
1030                 case O_PROTO: {
1031                         struct protoent *pe;
1032
1033                         if ((cmd->len & F_OR) && !or_block)
1034                                 printf(" {");
1035                         if (cmd->len & F_NOT)
1036                                 printf(" not");
1037                         proto = cmd->arg1;
1038                         pe = getprotobynumber(cmd->arg1);
1039                         if (flags & HAVE_OPTIONS)
1040                                 printf(" proto");
1041                         if (pe)
1042                                 printf(" %s", pe->p_name);
1043                         else
1044                                 printf(" %u", cmd->arg1);
1045                         }
1046                         flags |= HAVE_PROTO;
1047                         break;
1048
1049                 default: /*options ... */
1050                         show_prerequisites(&flags, HAVE_IP | HAVE_OPTIONS, 0);
1051                         if ((cmd->len & F_OR) && !or_block)
1052                                 printf(" {");
1053                         if (cmd->len & F_NOT && cmd->opcode != O_IN)
1054                                 printf(" not");
1055                         switch(cmd->opcode) {
1056                         case O_FRAG:
1057                                 printf(" frag");
1058                                 break;
1059
1060                         case O_IN:
1061                                 printf(cmd->len & F_NOT ? " out" : " in");
1062                                 break;
1063
1064                         case O_LAYER2:
1065                                 printf(" layer2");
1066                                 break;
1067                         case O_XMIT:
1068                         case O_RECV:
1069                         case O_VIA: {
1070                                 char *s;
1071                                 ipfw_insn_if *cmdif = (ipfw_insn_if *)cmd;
1072
1073                                 if (cmd->opcode == O_XMIT)
1074                                         s = "xmit";
1075                                 else if (cmd->opcode == O_RECV)
1076                                         s = "recv";
1077                                 else if (cmd->opcode == O_VIA)
1078                                         s = "via";
1079                                 else
1080                                         s = "?huh?";
1081                                 if (cmdif->name[0] == '\0')
1082                                         printf(" %s %s", s,
1083                                             inet_ntoa(cmdif->p.ip));
1084                                 printf(" %s %s", s, cmdif->name);
1085                                 }
1086                                 break;
1087
1088                         case O_IPID:
1089                                 printf(" ipid %u", cmd->arg1 );
1090                                 break;
1091
1092                         case O_IPTTL:
1093                                 printf(" ipttl %u", cmd->arg1 );
1094                                 break;
1095
1096                         case O_IPVER:
1097                                 printf(" ipver %u", cmd->arg1 );
1098                                 break;
1099
1100                         case O_IPPRECEDENCE:
1101                                 printf(" ipprecedence %u", (cmd->arg1) >> 5 );
1102                                 break;
1103
1104                         case O_IPLEN:
1105                                 printf(" iplen %u", cmd->arg1 );
1106                                 break;
1107
1108                         case O_IPOPT:
1109                                 print_flags("ipoptions", cmd, f_ipopts);
1110                                 break;
1111
1112                         case O_IPTOS:
1113                                 print_flags("iptos", cmd, f_iptos);
1114                                 break;
1115
1116                         case O_ICMPTYPE:
1117                                 print_icmptypes((ipfw_insn_u32 *)cmd);
1118                                 break;
1119
1120                         case O_ESTAB:
1121                                 printf(" established");
1122                                 break;
1123
1124                         case O_TCPFLAGS:
1125                                 print_flags("tcpflags", cmd, f_tcpflags);
1126                                 break;
1127
1128                         case O_TCPOPTS:
1129                                 print_flags("tcpoptions", cmd, f_tcpopts);
1130                                 break;
1131
1132                         case O_TCPWIN:
1133                                 printf(" tcpwin %d", ntohs(cmd->arg1));
1134                                 break;
1135
1136                         case O_TCPACK:
1137                                 printf(" tcpack %ld", ntohl(cmd32->d[0]));
1138                                 break;
1139
1140                         case O_TCPSEQ:
1141                                 printf(" tcpseq %ld", ntohl(cmd32->d[0]));
1142                                 break;
1143
1144                         case O_UID:
1145                             {
1146                                 struct passwd *pwd = getpwuid(cmd32->d[0]);
1147
1148                                 if (pwd)
1149                                         printf(" uid %s", pwd->pw_name);
1150                                 else
1151                                         printf(" uid %u", cmd32->d[0]);
1152                             }
1153                                 break;
1154
1155                         case O_GID:
1156                             {
1157                                 struct group *grp = getgrgid(cmd32->d[0]);
1158
1159                                 if (grp)
1160                                         printf(" gid %s", grp->gr_name);
1161                                 else
1162                                         printf(" gid %u", cmd32->d[0]);
1163                             }
1164                                 break;
1165
1166                         case O_KEEP_STATE:
1167                                 printf(" keep-state");
1168                                 break;
1169
1170                         case O_LIMIT:
1171                             {
1172                                 struct _s_x *p = limit_masks;
1173                                 ipfw_insn_limit *c = (ipfw_insn_limit *)cmd;
1174                                 u_int8_t x = c->limit_mask;
1175                                 char *comma = " ";
1176
1177                                 printf(" limit");
1178                                 for ( ; p->x != 0 ; p++)
1179                                         if ((x & p->x) == p->x) {
1180                                                 x &= ~p->x;
1181                                                 printf("%s%s", comma, p->s);
1182                                                 comma = ",";
1183                                         }
1184                                 printf(" %d", c->conn_limit);
1185                             }
1186                                 break;
1187
1188                         default:
1189                                 printf(" [opcode %d len %d]",
1190                                     cmd->opcode, cmd->len);
1191                         }
1192                 }
1193                 if (cmd->len & F_OR) {
1194                         printf(" or");
1195                         or_block = 1;
1196                 } else if (or_block) {
1197                         printf(" }");
1198                         or_block = 0;
1199                 }
1200         }
1201         show_prerequisites(&flags, HAVE_IP, 0);
1202
1203         printf("\n");
1204 }
1205
1206 static void
1207 show_dyn_ipfw(struct ipfw_ioc_state *d, int pcwidth, int bcwidth)
1208 {
1209         struct protoent *pe;
1210         struct in_addr a;
1211
1212         if (!do_expired) {
1213                 if (!d->expire && !(d->dyn_type == O_LIMIT_PARENT))
1214                         return;
1215         }
1216
1217         printf("%05u %*llu %*llu (%ds)", d->rulenum, pcwidth, d->pcnt,
1218             bcwidth, d->bcnt, d->expire);
1219         switch (d->dyn_type) {
1220         case O_LIMIT_PARENT:
1221                 printf(" PARENT %d", d->count);
1222                 break;
1223         case O_LIMIT:
1224                 printf(" LIMIT");
1225                 break;
1226         case O_KEEP_STATE: /* bidir, no mask */
1227                 printf(" STATE");
1228                 break;
1229         }
1230
1231         if ((pe = getprotobynumber(d->id.u.ip.proto)) != NULL)
1232                 printf(" %s", pe->p_name);
1233         else
1234                 printf(" proto %u", d->id.u.ip.proto);
1235
1236         a.s_addr = htonl(d->id.u.ip.src_ip);
1237         printf(" %s %d", inet_ntoa(a), d->id.u.ip.src_port);
1238
1239         a.s_addr = htonl(d->id.u.ip.dst_ip);
1240         printf(" <-> %s %d", inet_ntoa(a), d->id.u.ip.dst_port);
1241         printf("\n");
1242 }
1243
1244 int
1245 sort_q(const void *pa, const void *pb)
1246 {
1247         int rev = (do_sort < 0);
1248         int field = rev ? -do_sort : do_sort;
1249         long long res = 0;
1250         const struct dn_ioc_flowqueue *a = pa;
1251         const struct dn_ioc_flowqueue *b = pb;
1252
1253         switch (field) {
1254         case 1: /* pkts */
1255                 res = a->len - b->len;
1256                 break;
1257         case 2: /* bytes */
1258                 res = a->len_bytes - b->len_bytes;
1259                 break;
1260
1261         case 3: /* tot pkts */
1262                 res = a->tot_pkts - b->tot_pkts;
1263                 break;
1264
1265         case 4: /* tot bytes */
1266                 res = a->tot_bytes - b->tot_bytes;
1267                 break;
1268         }
1269         if (res < 0)
1270                 res = -1;
1271         if (res > 0)
1272                 res = 1;
1273         return (int)(rev ? res : -res);
1274 }
1275
1276 static void
1277 list_queues(struct dn_ioc_flowset *fs, struct dn_ioc_flowqueue *q)
1278 {
1279         int l;
1280
1281         printf("    mask: 0x%02x 0x%08x/0x%04x -> 0x%08x/0x%04x\n",
1282             fs->flow_mask.u.ip.proto,
1283             fs->flow_mask.u.ip.src_ip, fs->flow_mask.u.ip.src_port,
1284             fs->flow_mask.u.ip.dst_ip, fs->flow_mask.u.ip.dst_port);
1285         if (fs->rq_elements == 0)
1286                 return;
1287
1288         printf("BKT Prot ___Source IP/port____ "
1289             "____Dest. IP/port____ Tot_pkt/bytes Pkt/Byte Drp\n");
1290         if (do_sort != 0)
1291                 heapsort(q, fs->rq_elements, sizeof(*q), sort_q);
1292         for (l = 0; l < fs->rq_elements; l++) {
1293                 struct in_addr ina;
1294                 struct protoent *pe;
1295
1296                 ina.s_addr = htonl(q[l].id.u.ip.src_ip);
1297                 printf("%3d ", q[l].hash_slot);
1298                 pe = getprotobynumber(q[l].id.u.ip.proto);
1299                 if (pe)
1300                         printf("%-4s ", pe->p_name);
1301                 else
1302                         printf("%4u ", q[l].id.u.ip.proto);
1303                 printf("%15s/%-5d ",
1304                     inet_ntoa(ina), q[l].id.u.ip.src_port);
1305                 ina.s_addr = htonl(q[l].id.u.ip.dst_ip);
1306                 printf("%15s/%-5d ",
1307                     inet_ntoa(ina), q[l].id.u.ip.dst_port);
1308                 printf("%4qu %8qu %2u %4u %3u\n",
1309                     q[l].tot_pkts, q[l].tot_bytes,
1310                     q[l].len, q[l].len_bytes, q[l].drops);
1311                 if (verbose)
1312                         printf("   S %20qd  F %20qd\n",
1313                             q[l].S, q[l].F);
1314         }
1315 }
1316
1317 static void
1318 print_flowset_parms(struct dn_ioc_flowset *fs, char *prefix)
1319 {
1320         int l;
1321         char qs[30];
1322         char plr[30];
1323         char red[90];   /* Display RED parameters */
1324
1325         l = fs->qsize;
1326         if (fs->flags_fs & DN_QSIZE_IS_BYTES) {
1327                 if (l >= 8192)
1328                         sprintf(qs, "%d KB", l / 1024);
1329                 else
1330                         sprintf(qs, "%d B", l);
1331         } else
1332                 sprintf(qs, "%3d sl.", l);
1333         if (fs->plr)
1334                 sprintf(plr, "plr %f", 1.0 * fs->plr / (double)(0x7fffffff));
1335         else
1336                 plr[0] = '\0';
1337         if (fs->flags_fs & DN_IS_RED)   /* RED parameters */
1338                 sprintf(red,
1339                     "\n\t  %cRED w_q %f min_th %d max_th %d max_p %f",
1340                     (fs->flags_fs & DN_IS_GENTLE_RED) ? 'G' : ' ',
1341                     1.0 * fs->w_q / (double)(1 << SCALE_RED),
1342                     SCALE_VAL(fs->min_th),
1343                     SCALE_VAL(fs->max_th),
1344                     1.0 * fs->max_p / (double)(1 << SCALE_RED));
1345         else
1346                 sprintf(red, "droptail");
1347
1348         printf("%s %s%s %d queues (%d buckets) %s\n",
1349             prefix, qs, plr, fs->rq_elements, fs->rq_size, red);
1350 }
1351
1352 static void
1353 list_pipes(void *data, int nbytes, int ac, char *av[])
1354 {
1355         u_long rulenum;
1356         void *next = data;
1357         struct dn_ioc_pipe *p = (struct dn_ioc_pipe *)data;
1358         struct dn_ioc_flowset *fs;
1359         struct dn_ioc_flowqueue *q;
1360         int l;
1361
1362         if (ac > 0)
1363                 rulenum = strtoul(*av++, NULL, 10);
1364         else
1365                 rulenum = 0;
1366         for (; nbytes >= sizeof(*p); p = (struct dn_ioc_pipe *)next) {
1367                 double b = p->bandwidth;
1368                 char buf[30];
1369                 char prefix[80];
1370
1371                 if (p->fs.fs_type != DN_IS_PIPE)
1372                         break;  /* done with pipes, now queues */
1373
1374                 /*
1375                  * compute length, as pipe have variable size
1376                  */
1377                 l = sizeof(*p) + p->fs.rq_elements * sizeof(*q);
1378                 next = (void *)p + l;
1379                 nbytes -= l;
1380
1381                 if (rulenum != 0 && rulenum != p->pipe_nr)
1382                         continue;
1383
1384                 /*
1385                  * Print rate
1386                  */
1387                 if (b == 0)
1388                         sprintf(buf, "unlimited");
1389                 else if (b >= 1000000)
1390                         sprintf(buf, "%7.3f Mbit/s", b/1000000);
1391                 else if (b >= 1000)
1392                         sprintf(buf, "%7.3f Kbit/s", b/1000);
1393                 else
1394                         sprintf(buf, "%7.3f bit/s ", b);
1395
1396                 sprintf(prefix, "%05d: %s %4d ms ",
1397                     p->pipe_nr, buf, p->delay);
1398                 print_flowset_parms(&p->fs, prefix);
1399                 if (verbose)
1400                         printf("   V %20qd\n", p->V >> MY_M);
1401
1402                 q = (struct dn_ioc_flowqueue *)(p+1);
1403                 list_queues(&p->fs, q);
1404         }
1405         for (fs = next; nbytes >= sizeof(*fs); fs = next) {
1406                 char prefix[80];
1407
1408                 if (fs->fs_type != DN_IS_QUEUE)
1409                         break;
1410                 l = sizeof(*fs) + fs->rq_elements * sizeof(*q);
1411                 next = (void *)fs + l;
1412                 nbytes -= l;
1413                 q = (struct dn_ioc_flowqueue *)(fs+1);
1414                 sprintf(prefix, "q%05d: weight %d pipe %d ",
1415                     fs->fs_nr, fs->weight, fs->parent_nr);
1416                 print_flowset_parms(fs, prefix);
1417                 list_queues(fs, q);
1418         }
1419 }
1420
1421 /*
1422  * This one handles all set-related commands
1423  *      ipfw set { show | enable | disable }
1424  *      ipfw set swap X Y
1425  *      ipfw set move X to Y
1426  *      ipfw set move rule X to Y
1427  */
1428 static void
1429 sets_handler(int ac, char *av[])
1430 {
1431         u_int32_t set_disable, masks[2];
1432         int i, nbytes;
1433         u_int16_t rulenum;
1434         u_int8_t cmd, new_set;
1435
1436         ac--;
1437         av++;
1438
1439         if (!ac)
1440                 errx(EX_USAGE, "set needs command");
1441         if (!strncmp(*av, "show", strlen(*av)) ) {
1442                 void *data;
1443                 char *msg;
1444
1445                 nbytes = sizeof(struct ipfw_ioc_rule);
1446                 if ((data = malloc(nbytes)) == NULL)
1447                         err(EX_OSERR, "malloc");
1448                 if (getsockopt(s, IPPROTO_IP, IP_FW_GET, data, &nbytes) < 0)
1449                         err(EX_OSERR, "getsockopt(IP_FW_GET)");
1450                 set_disable = ((struct ipfw_ioc_rule *)data)->set_disable;
1451
1452                 for (i = 0, msg = "disable" ; i < 31; i++)
1453                         if (  (set_disable & (1<<i))) {
1454                                 printf("%s %d", msg, i);
1455                                 msg = "";
1456                         }
1457                 msg = (set_disable) ? " enable" : "enable";
1458                 for (i = 0; i < 31; i++)
1459                         if ( !(set_disable & (1<<i))) {
1460                                 printf("%s %d", msg, i);
1461                                 msg = "";
1462                         }
1463                 printf("\n");
1464         } else if (!strncmp(*av, "swap", strlen(*av))) {
1465                 ac--; av++;
1466                 if (ac != 2)
1467                         errx(EX_USAGE, "set swap needs 2 set numbers\n");
1468                 rulenum = atoi(av[0]);
1469                 new_set = atoi(av[1]);
1470                 if (!isdigit(*(av[0])) || rulenum > 30)
1471                         errx(EX_DATAERR, "invalid set number %s\n", av[0]);
1472                 if (!isdigit(*(av[1])) || new_set > 30)
1473                         errx(EX_DATAERR, "invalid set number %s\n", av[1]);
1474                 masks[0] = (4 << 24) | (new_set << 16) | (rulenum);
1475                 i = setsockopt(s, IPPROTO_IP, IP_FW_DEL,
1476                         masks, sizeof(u_int32_t));
1477         } else if (!strncmp(*av, "move", strlen(*av))) {
1478                 ac--; av++;
1479                 if (ac && !strncmp(*av, "rule", strlen(*av))) {
1480                         cmd = 2;
1481                         ac--; av++;
1482                 } else
1483                         cmd = 3;
1484                 if (ac != 3 || strncmp(av[1], "to", strlen(*av)))
1485                         errx(EX_USAGE, "syntax: set move [rule] X to Y\n");
1486                 rulenum = atoi(av[0]);
1487                 new_set = atoi(av[2]);
1488                 if (!isdigit(*(av[0])) || (cmd == 3 && rulenum > 30) ||
1489                         (cmd == 2 && rulenum == 65535) )
1490                         errx(EX_DATAERR, "invalid source number %s\n", av[0]);
1491                 if (!isdigit(*(av[2])) || new_set > 30)
1492                         errx(EX_DATAERR, "invalid dest. set %s\n", av[1]);
1493                 masks[0] = (cmd << 24) | (new_set << 16) | (rulenum);
1494                 i = setsockopt(s, IPPROTO_IP, IP_FW_DEL,
1495                         masks, sizeof(u_int32_t));
1496         } else if (!strncmp(*av, "disable", strlen(*av)) ||
1497                    !strncmp(*av, "enable",  strlen(*av)) ) {
1498                 int which = !strncmp(*av, "enable",  strlen(*av)) ? 1 : 0;
1499
1500                 ac--; av++;
1501                 masks[0] = masks[1] = 0;
1502
1503                 while (ac) {
1504                         if (isdigit(**av)) {
1505                                 i = atoi(*av);
1506                                 if (i < 0 || i > 30)
1507                                         errx(EX_DATAERR,
1508                                             "invalid set number %d\n", i);
1509                                 masks[which] |= (1<<i);
1510                         } else if (!strncmp(*av, "disable", strlen(*av)))
1511                                 which = 0;
1512                         else if (!strncmp(*av, "enable", strlen(*av)))
1513                                 which = 1;
1514                         else
1515                                 errx(EX_DATAERR,
1516                                         "invalid set command %s\n", *av);
1517                         av++; ac--;
1518                 }
1519                 if ( (masks[0] & masks[1]) != 0 )
1520                         errx(EX_DATAERR,
1521                             "cannot enable and disable the same set\n");
1522
1523                 i = setsockopt(s, IPPROTO_IP, IP_FW_DEL, masks, sizeof(masks));
1524                 if (i)
1525                         warn("set enable/disable: setsockopt(IP_FW_DEL)");
1526         } else
1527                 errx(EX_USAGE, "invalid set command %s\n", *av);
1528 }
1529
1530 static void
1531 sysctl_handler(int ac, char *av[], int which)
1532 {
1533         ac--;
1534         av++;
1535
1536         if (*av == NULL) {
1537                 warnx("missing keyword to enable/disable\n");
1538         } else if (strncmp(*av, "firewall", strlen(*av)) == 0) {
1539                 sysctlbyname("net.inet.ip.fw.enable", NULL, 0,
1540                     &which, sizeof(which));
1541         } else if (strncmp(*av, "one_pass", strlen(*av)) == 0) {
1542                 sysctlbyname("net.inet.ip.fw.one_pass", NULL, 0,
1543                     &which, sizeof(which));
1544         } else if (strncmp(*av, "debug", strlen(*av)) == 0) {
1545                 sysctlbyname("net.inet.ip.fw.debug", NULL, 0,
1546                     &which, sizeof(which));
1547         } else if (strncmp(*av, "verbose", strlen(*av)) == 0) {
1548                 sysctlbyname("net.inet.ip.fw.verbose", NULL, 0,
1549                     &which, sizeof(which));
1550         } else if (strncmp(*av, "dyn_keepalive", strlen(*av)) == 0) {
1551                 sysctlbyname("net.inet.ip.fw.dyn_keepalive", NULL, 0,
1552                     &which, sizeof(which));
1553         } else {
1554                 warnx("unrecognize enable/disable keyword: %s\n", *av);
1555         }
1556 }
1557
1558 static void
1559 list(int ac, char *av[])
1560 {
1561         struct ipfw_ioc_rule *r;
1562         struct ipfw_ioc_state *dynrules, *d;
1563
1564         void *data = NULL;
1565         int bcwidth, n, nbytes, nstat, ndyn, pcwidth, width;
1566         int exitval = EX_OK;
1567         int lac;
1568         char **lav;
1569         u_long rnum;
1570         char *endptr;
1571         int seen = 0;
1572
1573         const int ocmd = do_pipe ? IP_DUMMYNET_GET : IP_FW_GET;
1574         int nalloc = 1024;      /* start somewhere... */
1575
1576         ac--;
1577         av++;
1578
1579         /* get rules or pipes from kernel, resizing array as necessary */
1580         nbytes = nalloc;
1581
1582         while (nbytes >= nalloc) {
1583                 nalloc = nalloc * 2 + 200;
1584                 nbytes = nalloc;
1585                 if ((data = realloc(data, nbytes)) == NULL)
1586                         err(EX_OSERR, "realloc");
1587                 if (getsockopt(s, IPPROTO_IP, ocmd, data, &nbytes) < 0)
1588                         err(EX_OSERR, "getsockopt(IP_%s_GET)",
1589                                 do_pipe ? "DUMMYNET" : "FW");
1590         }
1591
1592         if (do_pipe) {
1593                 list_pipes(data, nbytes, ac, av);
1594                 goto done;
1595         }
1596
1597         /*
1598          * Count static rules.
1599          */
1600         r = data;
1601         nstat = r->static_count;
1602
1603         /*
1604          * Count dynamic rules. This is easier as they have
1605          * fixed size.
1606          */
1607         dynrules = (struct ipfw_ioc_state *)((void *)r + r->static_len);
1608         ndyn = (nbytes - r->static_len) / sizeof(*dynrules);
1609
1610         /* if showing stats, figure out column widths ahead of time */
1611         bcwidth = pcwidth = 0;
1612         if (do_acct) {
1613                 for (n = 0, r = data; n < nstat;
1614                     n++, r = (void *)r + IOC_RULESIZE(r)) {
1615                         /* packet counter */
1616                         width = snprintf(NULL, 0, "%llu", r->pcnt);
1617                         if (width > pcwidth)
1618                                 pcwidth = width;
1619
1620                         /* byte counter */
1621                         width = snprintf(NULL, 0, "%llu", r->bcnt);
1622                         if (width > bcwidth)
1623                                 bcwidth = width;
1624                 }
1625         }
1626         if (do_dynamic && ndyn) {
1627                 for (n = 0, d = dynrules; n < ndyn; n++, d++) {
1628                         width = snprintf(NULL, 0, "%llu", d->pcnt);
1629                         if (width > pcwidth)
1630                                 pcwidth = width;
1631
1632                         width = snprintf(NULL, 0, "%llu", d->bcnt);
1633                         if (width > bcwidth)
1634                                 bcwidth = width;
1635                 }
1636         }
1637         /* if no rule numbers were specified, list all rules */
1638         if (ac == 0) {
1639                 for (n = 0, r = data; n < nstat;
1640                     n++, r = (void *)r + IOC_RULESIZE(r) )
1641                         show_ipfw(r, pcwidth, bcwidth);
1642
1643                 if (do_dynamic && ndyn) {
1644                         printf("## Dynamic rules (%d):\n", ndyn);
1645                         for (n = 0, d = dynrules; n < ndyn; n++, d++)
1646                                 show_dyn_ipfw(d, pcwidth, bcwidth);
1647                 }
1648                 goto done;
1649         }
1650
1651         /* display specific rules requested on command line */
1652
1653         for (lac = ac, lav = av; lac != 0; lac--) {
1654                 /* convert command line rule # */
1655                 rnum = strtoul(*lav++, &endptr, 10);
1656                 if (*endptr) {
1657                         exitval = EX_USAGE;
1658                         warnx("invalid rule number: %s", *(lav - 1));
1659                         continue;
1660                 }
1661                 for (n = seen = 0, r = data; n < nstat;
1662                     n++, r = (void *)r + IOC_RULESIZE(r) ) {
1663                         if (r->rulenum > rnum)
1664                                 break;
1665                         if (r->rulenum == rnum) {
1666                                 show_ipfw(r, pcwidth, bcwidth);
1667                                 seen = 1;
1668                         }
1669                 }
1670                 if (!seen) {
1671                         /* give precedence to other error(s) */
1672                         if (exitval == EX_OK)
1673                                 exitval = EX_UNAVAILABLE;
1674                         warnx("rule %lu does not exist", rnum);
1675                 }
1676         }
1677
1678         if (do_dynamic && ndyn) {
1679                 printf("## Dynamic rules:\n");
1680                 for (lac = ac, lav = av; lac != 0; lac--) {
1681                         rnum = strtoul(*lav++, &endptr, 10);
1682                         if (*endptr)
1683                                 /* already warned */
1684                                 continue;
1685                         for (n = 0, d = dynrules; n < ndyn; n++, d++) {
1686                                 if (d->rulenum > rnum)
1687                                         break;
1688                                 if (d->rulenum == rnum)
1689                                         show_dyn_ipfw(d, pcwidth, bcwidth);
1690                         }
1691                 }
1692         }
1693
1694         ac = 0;
1695
1696 done:
1697         free(data);
1698
1699         if (exitval != EX_OK)
1700                 exit(exitval);
1701 }
1702
1703 static void
1704 show_usage(void)
1705 {
1706         fprintf(stderr, "usage: ipfw [options]\n"
1707 "    add [number] rule\n"
1708 "    pipe number config [pipeconfig]\n"
1709 "    queue number config [queueconfig]\n"
1710 "    [pipe] flush\n"
1711 "    [pipe] delete number ...\n"
1712 "    [pipe] {list|show} [number ...]\n"
1713 "    {zero|resetlog} [number ...]\n"
1714 "do \"ipfw -h\" or see ipfw manpage for details\n"
1715 );
1716
1717         exit(EX_USAGE);
1718 }
1719
1720 static void
1721 help(void)
1722 {
1723
1724         fprintf(stderr, "ipfw syntax summary:\n"
1725 "ipfw add [N] [prob {0..1}] ACTION [log [logamount N]] ADDR OPTIONS\n"
1726 "ipfw {pipe|queue} N config BODY\n"
1727 "ipfw [pipe] {zero|delete|show} [N{,N}]\n"
1728 "\n"
1729 "RULE:          [1..] [PROB] BODY\n"
1730 "RULENUM:       INTEGER(1..65534)\n"
1731 "PROB:          prob REAL(0..1)\n"
1732 "BODY:          check-state [LOG] (no body) |\n"
1733 "               ACTION [LOG] MATCH_ADDR [OPTION_LIST]\n"
1734 "ACTION:        check-state | allow | count | deny | reject | skipto N |\n"
1735 "               {divert|tee} PORT | forward ADDR | pipe N | queue N\n"
1736 "ADDR:          [ MAC dst src ether_type ] \n"
1737 "               [ from IPLIST [ PORT ] to IPLIST [ PORTLIST ] ]\n"
1738 "IPLIST:        IPADDR | ( IPADDR or ... or IPADDR )\n"
1739 "IPADDR:        [not] { any | me | ip | ip/bits | ip:mask | ip/bits{x,y,z} }\n"
1740 "OPTION_LIST:   OPTION [,OPTION_LIST]\n"
1741 );
1742 exit(0);
1743 }
1744
1745
1746 static int
1747 lookup_host (char *host, struct in_addr *ipaddr)
1748 {
1749         struct hostent *he;
1750
1751         if (!inet_aton(host, ipaddr)) {
1752                 if ((he = gethostbyname(host)) == NULL)
1753                         return(-1);
1754                 *ipaddr = *(struct in_addr *)he->h_addr_list[0];
1755         }
1756         return(0);
1757 }
1758
1759 /*
1760  * fills the addr and mask fields in the instruction as appropriate from av.
1761  * Update length as appropriate.
1762  * The following formats are allowed:
1763  *      any     matches any IP. Actually returns an empty instruction.
1764  *      me      returns O_IP_*_ME
1765  *      1.2.3.4         single IP address
1766  *      1.2.3.4:5.6.7.8 address:mask
1767  *      1.2.3.4/24      address/mask
1768  *      1.2.3.4/26{1,6,5,4,23}  set of addresses in a subnet
1769  */
1770 static void
1771 fill_ip(ipfw_insn_ip *cmd, char *av)
1772 {
1773         char *p = 0, md = 0;
1774         u_int32_t i;
1775
1776         cmd->o.len &= ~F_LEN_MASK;      /* zero len */
1777
1778         if (!strncmp(av, "any", strlen(av)))
1779                 return;
1780
1781         if (!strncmp(av, "me", strlen(av))) {
1782                 cmd->o.len |= F_INSN_SIZE(ipfw_insn);
1783                 return;
1784         }
1785
1786         p = strchr(av, '/');
1787         if (!p)
1788                 p = strchr(av, ':');
1789         if (p) {
1790                 md = *p;
1791                 *p++ = '\0';
1792         }
1793
1794         if (lookup_host(av, &cmd->addr) != 0)
1795                 errx(EX_NOHOST, "hostname ``%s'' unknown", av);
1796         switch (md) {
1797         case ':':
1798                 if (!inet_aton(p, &cmd->mask))
1799                         errx(EX_DATAERR, "bad netmask ``%s''", p);
1800                 break;
1801         case '/':
1802                 i = atoi(p);
1803                 if (i == 0)
1804                         cmd->mask.s_addr = htonl(0);
1805                 else if (i > 32)
1806                         errx(EX_DATAERR, "bad width ``%s''", p);
1807                 else
1808                         cmd->mask.s_addr = htonl(~0 << (32 - i));
1809                 break;
1810         default:
1811                 cmd->mask.s_addr = htonl(~0);
1812                 break;
1813         }
1814         cmd->addr.s_addr &= cmd->mask.s_addr;
1815         /*
1816          * now look if we have a set of addresses. They are stored as follows:
1817          *   arg1       is the set size (powers of 2, 2..256)
1818          *   addr       is the base address IN HOST FORMAT
1819          *   mask..     is an array of u_int32_t with bits set.
1820          */
1821         if (p)
1822                 p = strchr(p, '{');
1823         if (p) {        /* fetch addresses */
1824                 u_int32_t *d;
1825                 int low, high;
1826                 int i = contigmask((u_char *)&(cmd->mask), 32);
1827
1828                 if (i < 24 || i > 31) {
1829                         fprintf(stderr, "invalid set with mask %d\n",
1830                                 i);
1831                         exit(0);
1832                 }
1833                 cmd->o.arg1 = 1<<(32-i);
1834                 cmd->addr.s_addr = ntohl(cmd->addr.s_addr);
1835                 d = (u_int32_t *)&cmd->mask;
1836                 cmd->o.opcode = O_IP_DST_SET;   /* default */
1837                 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32) + (cmd->o.arg1+31)/32;
1838                 for (i = 0; i < (cmd->o.arg1+31)/32 ; i++)
1839                         d[i] = 0;       /* clear masks */
1840
1841                 av = p+1;
1842                 low = cmd->addr.s_addr & 0xff;
1843                 high = low + cmd->o.arg1 - 1;
1844                 while (isdigit(*av)) {
1845                         char *s;
1846                         u_int16_t a = strtol(av, &s, 0);
1847
1848                         if (s == av) /* no parameter */
1849                                 break;
1850                         if (a < low || a > high) {
1851                             fprintf(stderr, "addr %d out of range [%d-%d]\n",
1852                                 a, low, high);
1853                             exit(0);
1854                         }
1855                         a -= low;
1856                         d[ a/32] |= 1<<(a & 31);
1857                         if (*s != ',')
1858                                 break;
1859                         av = s+1;
1860                 }
1861                 return;
1862         }
1863
1864         if (cmd->mask.s_addr == 0) { /* any */
1865                 if (cmd->o.len & F_NOT)
1866                         errx(EX_DATAERR, "not any never matches");
1867                 else    /* useless, nuke it */
1868                         return;
1869         } else if (cmd->mask.s_addr ==  IP_MASK_ALL)    /* one IP */
1870                 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32);
1871         else                                            /* addr/mask */
1872                 cmd->o.len |= F_INSN_SIZE(ipfw_insn_ip);
1873 }
1874
1875
1876 /*
1877  * helper function to process a set of flags and set bits in the
1878  * appropriate masks.
1879  */
1880 static void
1881 fill_flags(ipfw_insn *cmd, enum ipfw_opcodes opcode,
1882         struct _s_x *flags, char *p)
1883 {
1884         u_int8_t set=0, clear=0;
1885
1886         while (p && *p) {
1887                 char *q;        /* points to the separator */
1888                 int val;
1889                 u_int8_t *which;        /* mask we are working on */
1890
1891                 if (*p == '!') {
1892                         p++;
1893                         which = &clear;
1894                 } else
1895                         which = &set;
1896                 q = strchr(p, ',');
1897                 if (q)
1898                         *q++ = '\0';
1899                 val = match_token(flags, p);
1900                 if (val <= 0)
1901                         errx(EX_DATAERR, "invalid flag %s", p);
1902                 *which |= (u_int8_t)val;
1903                 p = q;
1904         }
1905         cmd->opcode = opcode;
1906         cmd->len =  (cmd->len & (F_NOT | F_OR)) | 1;
1907         cmd->arg1 = (set & 0xff) | ( (clear & 0xff) << 8);
1908 }
1909
1910
1911 static void
1912 delete(int ac, char *av[])
1913 {
1914         u_int32_t rulenum;
1915         struct dn_ioc_pipe pipe;
1916         int i;
1917         int exitval = EX_OK;
1918         int do_set = 0;
1919
1920         memset(&pipe, 0, sizeof pipe);
1921
1922         av++; ac--;
1923         if (ac > 0 && !strncmp(*av, "set", strlen(*av))) {
1924                 do_set = 1;     /* delete set */
1925                 ac--; av++;
1926         }
1927
1928         /* Rule number */
1929         while (ac && isdigit(**av)) {
1930                 i = atoi(*av); av++; ac--;
1931                 if (do_pipe) {
1932                         if (do_pipe == 1)
1933                                 pipe.pipe_nr = i;
1934                         else
1935                                 pipe.fs.fs_nr = i;
1936                         i = setsockopt(s, IPPROTO_IP, IP_DUMMYNET_DEL,
1937                             &pipe, sizeof pipe);
1938                         if (i) {
1939                                 exitval = 1;
1940                                 warn("rule %u: setsockopt(IP_DUMMYNET_DEL)",
1941                                     do_pipe == 1 ? pipe.pipe_nr :
1942                                     pipe.fs.fs_nr);
1943                         }
1944                 } else {
1945                         rulenum =  (i & 0xffff) | (do_set << 24);
1946                         i = setsockopt(s, IPPROTO_IP, IP_FW_DEL, &rulenum,
1947                             sizeof rulenum);
1948                         if (i) {
1949                                 exitval = EX_UNAVAILABLE;
1950                                 warn("rule %u: setsockopt(IP_FW_DEL)",
1951                                     rulenum);
1952                         }
1953                 }
1954         }
1955         if (exitval != EX_OK)
1956                 exit(exitval);
1957 }
1958
1959
1960 /*
1961  * fill the interface structure. We do not check the name as we can
1962  * create interfaces dynamically, so checking them at insert time
1963  * makes relatively little sense.
1964  * Interface names containing '*', '?', or '[' are assumed to be shell
1965  * patterns which match interfaces.
1966  */
1967 static void
1968 fill_iface(ipfw_insn_if *cmd, char *arg)
1969 {
1970         cmd->name[0] = '\0';
1971         cmd->o.len |= F_INSN_SIZE(ipfw_insn_if);
1972
1973         /* Parse the interface or address */
1974         if (!strcmp(arg, "any"))
1975                 cmd->o.len = 0;         /* effectively ignore this command */
1976         else if (!isdigit(*arg)) {
1977                 strlcpy(cmd->name, arg, sizeof(cmd->name));
1978                 cmd->p.glob = strpbrk(arg, "*?[") != NULL ? 1 : 0;
1979         } else if (!inet_aton(arg, &cmd->p.ip))
1980                 errx(EX_DATAERR, "bad ip address ``%s''", arg);
1981 }
1982
1983 static unsigned long
1984 getbw(const char *str, u_short *flags, int kb)
1985 {
1986     char *end;
1987     unsigned long val;
1988     int inbytes = 0;
1989
1990     val = strtoul(str, &end, 0);
1991     if (*end == 'k' || *end == 'K') {
1992         ++end;
1993         val *= kb;
1994     } else if (*end == 'm' || *end == 'M') {
1995         ++end;
1996         val *= kb * kb;
1997     }
1998
1999     /*
2000      * Deal with bits or bytes or b(bits) or B(bytes).  If there is no
2001      * trailer assume bits.
2002      */
2003     if (strncasecmp(end, "bit", 3) == 0) {
2004         ;
2005     } else if (strncasecmp(end, "byte", 4) == 0) {
2006         inbytes = 1;
2007     } else if (*end == 'b') {
2008         ;
2009     } else if (*end == 'B') {
2010         inbytes = 1;
2011     }
2012
2013     /*
2014      * Return in bits if flags is NULL, else flag bits
2015      * or bytes in flags and return the unconverted value.
2016      */
2017     if (inbytes && flags)
2018         *flags |= DN_QSIZE_IS_BYTES;
2019     else if (inbytes && flags == NULL)
2020         val *= 8;
2021     return(val);
2022 }
2023
2024 /*
2025  * the following macro returns an error message if we run out of
2026  * arguments.
2027  */
2028 #define NEED1(msg)      {if (!ac) errx(EX_USAGE, msg);}
2029
2030 static void
2031 config_pipe(int ac, char **av)
2032 {
2033         struct dn_ioc_pipe pipe;
2034         int i;
2035         char *end;
2036         u_int32_t a;
2037         void *par = NULL;
2038
2039         memset(&pipe, 0, sizeof pipe);
2040
2041         av++; ac--;
2042         /* Pipe number */
2043         if (ac && isdigit(**av)) {
2044                 i = atoi(*av); av++; ac--;
2045                 if (do_pipe == 1)
2046                         pipe.pipe_nr = i;
2047                 else
2048                         pipe.fs.fs_nr = i;
2049         }
2050         while (ac > 0) {
2051                 double d;
2052                 int tok = match_token(dummynet_params, *av);
2053                 ac--; av++;
2054
2055                 switch(tok) {
2056                 case TOK_NOERROR:
2057                         pipe.fs.flags_fs |= DN_NOERROR;
2058                         break;
2059
2060                 case TOK_PLR:
2061                         NEED1("plr needs argument 0..1\n");
2062                         d = strtod(av[0], NULL);
2063                         if (d > 1)
2064                                 d = 1;
2065                         else if (d < 0)
2066                                 d = 0;
2067                         pipe.fs.plr = (int)(d*0x7fffffff);
2068                         ac--; av++;
2069                         break;
2070
2071                 case TOK_QUEUE:
2072                         NEED1("queue needs queue size\n");
2073                         end = NULL;
2074                         pipe.fs.qsize = getbw(av[0], &pipe.fs.flags_fs, 1024);
2075                         ac--; av++;
2076                         break;
2077
2078                 case TOK_BUCKETS:
2079                         NEED1("buckets needs argument\n");
2080                         pipe.fs.rq_size = strtoul(av[0], NULL, 0);
2081                         ac--; av++;
2082                         break;
2083
2084                 case TOK_MASK:
2085                         NEED1("mask needs mask specifier\n");
2086                         /*
2087                          * per-flow queue, mask is dst_ip, dst_port,
2088                          * src_ip, src_port, proto measured in bits
2089                          */
2090                         par = NULL;
2091
2092                         pipe.fs.flow_mask.type = ETHERTYPE_IP;
2093                         pipe.fs.flow_mask.u.ip.dst_ip = 0;
2094                         pipe.fs.flow_mask.u.ip.src_ip = 0;
2095                         pipe.fs.flow_mask.u.ip.dst_port = 0;
2096                         pipe.fs.flow_mask.u.ip.src_port = 0;
2097                         pipe.fs.flow_mask.u.ip.proto = 0;
2098                         end = NULL;
2099
2100                         while (ac >= 1) {
2101                             u_int32_t *p32 = NULL;
2102                             u_int16_t *p16 = NULL;
2103
2104                             tok = match_token(dummynet_params, *av);
2105                             ac--; av++;
2106                             switch(tok) {
2107                             case TOK_ALL:
2108                                     /*
2109                                      * special case, all bits significant
2110                                      */
2111                                     pipe.fs.flow_mask.u.ip.dst_ip = ~0;
2112                                     pipe.fs.flow_mask.u.ip.src_ip = ~0;
2113                                     pipe.fs.flow_mask.u.ip.dst_port = ~0;
2114                                     pipe.fs.flow_mask.u.ip.src_port = ~0;
2115                                     pipe.fs.flow_mask.u.ip.proto = ~0;
2116                                     pipe.fs.flags_fs |= DN_HAVE_FLOW_MASK;
2117                                     goto end_mask;
2118
2119                             case TOK_DSTIP:
2120                                     p32 = &pipe.fs.flow_mask.u.ip.dst_ip;
2121                                     break;
2122
2123                             case TOK_SRCIP:
2124                                     p32 = &pipe.fs.flow_mask.u.ip.src_ip;
2125                                     break;
2126
2127                             case TOK_DSTPORT:
2128                                     p16 = &pipe.fs.flow_mask.u.ip.dst_port;
2129                                     break;
2130
2131                             case TOK_SRCPORT:
2132                                     p16 = &pipe.fs.flow_mask.u.ip.src_port;
2133                                     break;
2134
2135                             case TOK_PROTO:
2136                                     break;
2137
2138                             default:
2139                                     ac++; av--; /* backtrack */
2140                                     goto end_mask;
2141                             }
2142                             if (ac < 1)
2143                                     errx(EX_USAGE, "mask: value missing");
2144                             if (*av[0] == '/') {
2145                                     a = strtoul(av[0]+1, &end, 0);
2146                                     a = (a == 32) ? ~0 : (1 << a) - 1;
2147                             } else
2148                                     a = strtoul(av[0], &end, 0);
2149                             if (p32 != NULL)
2150                                     *p32 = a;
2151                             else if (p16 != NULL) {
2152                                     if (a > 65535)
2153                                             errx(EX_DATAERR,
2154                                                 "mask: must be 16 bit");
2155                                     *p16 = (u_int16_t)a;
2156                             } else {
2157                                     if (a > 255)
2158                                             errx(EX_DATAERR,
2159                                                 "mask: must be 8 bit");
2160                                     pipe.fs.flow_mask.u.ip.proto = (uint8_t)a;
2161                             }
2162                             if (a != 0)
2163                                     pipe.fs.flags_fs |= DN_HAVE_FLOW_MASK;
2164                             ac--; av++;
2165                         } /* end while, config masks */
2166 end_mask:
2167                         break;
2168
2169                 case TOK_RED:
2170                 case TOK_GRED:
2171                         NEED1("red/gred needs w_q/min_th/max_th/max_p\n");
2172                         pipe.fs.flags_fs |= DN_IS_RED;
2173                         if (tok == TOK_GRED)
2174                                 pipe.fs.flags_fs |= DN_IS_GENTLE_RED;
2175                         /*
2176                          * the format for parameters is w_q/min_th/max_th/max_p
2177                          */
2178                         if ((end = strsep(&av[0], "/"))) {
2179                             double w_q = strtod(end, NULL);
2180                             if (w_q > 1 || w_q <= 0)
2181                                 errx(EX_DATAERR, "0 < w_q <= 1");
2182                             pipe.fs.w_q = (int) (w_q * (1 << SCALE_RED));
2183                         }
2184                         if ((end = strsep(&av[0], "/"))) {
2185                             pipe.fs.min_th = strtoul(end, &end, 0);
2186                             if (*end == 'K' || *end == 'k')
2187                                 pipe.fs.min_th *= 1024;
2188                         }
2189                         if ((end = strsep(&av[0], "/"))) {
2190                             pipe.fs.max_th = strtoul(end, &end, 0);
2191                             if (*end == 'K' || *end == 'k')
2192                                 pipe.fs.max_th *= 1024;
2193                         }
2194                         if ((end = strsep(&av[0], "/"))) {
2195                             double max_p = strtod(end, NULL);
2196                             if (max_p > 1 || max_p <= 0)
2197                                 errx(EX_DATAERR, "0 < max_p <= 1");
2198                             pipe.fs.max_p = (int)(max_p * (1 << SCALE_RED));
2199                         }
2200                         ac--; av++;
2201                         break;
2202
2203                 case TOK_DROPTAIL:
2204                         pipe.fs.flags_fs &= ~(DN_IS_RED|DN_IS_GENTLE_RED);
2205                         break;
2206
2207                 case TOK_BW:
2208                         NEED1("bw needs bandwidth\n");
2209                         if (do_pipe != 1)
2210                             errx(EX_DATAERR, "bandwidth only valid for pipes");
2211                         /*
2212                          * set bandwidth value
2213                          */
2214                         pipe.bandwidth = getbw(av[0], NULL, 1000);
2215                         if (pipe.bandwidth < 0)
2216                             errx(EX_DATAERR, "bandwidth too large");
2217                         ac--; av++;
2218                         break;
2219
2220                 case TOK_DELAY:
2221                         if (do_pipe != 1)
2222                                 errx(EX_DATAERR, "delay only valid for pipes");
2223                         NEED1("delay needs argument 0..10000ms\n");
2224                         pipe.delay = strtoul(av[0], NULL, 0);
2225                         ac--; av++;
2226                         break;
2227
2228                 case TOK_WEIGHT:
2229                         if (do_pipe == 1)
2230                                 errx(EX_DATAERR,"weight only valid for queues");
2231                         NEED1("weight needs argument 0..100\n");
2232                         pipe.fs.weight = strtoul(av[0], &end, 0);
2233                         ac--; av++;
2234                         break;
2235
2236                 case TOK_PIPE:
2237                         if (do_pipe == 1)
2238                                 errx(EX_DATAERR,"pipe only valid for queues");
2239                         NEED1("pipe needs pipe_number\n");
2240                         pipe.fs.parent_nr = strtoul(av[0], &end, 0);
2241                         ac--; av++;
2242                         break;
2243
2244                 default:
2245                         errx(EX_DATAERR, "unrecognised option ``%s''", *av);
2246                 }
2247         }
2248         if (do_pipe == 1) {
2249                 if (pipe.pipe_nr == 0)
2250                         errx(EX_DATAERR, "pipe_nr must be > 0");
2251                 if (pipe.delay > 10000)
2252                         errx(EX_DATAERR, "delay must be < 10000");
2253         } else { /* do_pipe == 2, queue */
2254                 if (pipe.fs.parent_nr == 0)
2255                         errx(EX_DATAERR, "pipe must be > 0");
2256                 if (pipe.fs.weight >100)
2257                         errx(EX_DATAERR, "weight must be <= 100");
2258         }
2259         if (pipe.fs.flags_fs & DN_QSIZE_IS_BYTES) {
2260                 if (pipe.fs.qsize > 1024*1024)
2261                         errx(EX_DATAERR, "queue size must be < 1MB");
2262         } else {
2263                 if (pipe.fs.qsize > 100)
2264                         errx(EX_DATAERR, "2 <= queue size <= 100");
2265         }
2266         if (pipe.fs.flags_fs & DN_IS_RED) {
2267                 size_t len;
2268                 int lookup_depth, avg_pkt_size;
2269                 double s, idle, weight, w_q;
2270                 int clock_hz;
2271                 int t;
2272
2273                 if (pipe.fs.min_th >= pipe.fs.max_th)
2274                     errx(EX_DATAERR, "min_th %d must be < than max_th %d",
2275                         pipe.fs.min_th, pipe.fs.max_th);
2276                 if (pipe.fs.max_th == 0)
2277                     errx(EX_DATAERR, "max_th must be > 0");
2278
2279                 len = sizeof(int);
2280                 if (sysctlbyname("net.inet.ip.dummynet.red_lookup_depth",
2281                         &lookup_depth, &len, NULL, 0) == -1)
2282
2283                     errx(1, "sysctlbyname(\"%s\")",
2284                         "net.inet.ip.dummynet.red_lookup_depth");
2285                 if (lookup_depth == 0)
2286                     errx(EX_DATAERR, "net.inet.ip.dummynet.red_lookup_depth"
2287                         " must be greater than zero");
2288
2289                 len = sizeof(int);
2290                 if (sysctlbyname("net.inet.ip.dummynet.red_avg_pkt_size",
2291                         &avg_pkt_size, &len, NULL, 0) == -1)
2292
2293                     errx(1, "sysctlbyname(\"%s\")",
2294                         "net.inet.ip.dummynet.red_avg_pkt_size");
2295                 if (avg_pkt_size == 0)
2296                         errx(EX_DATAERR,
2297                             "net.inet.ip.dummynet.red_avg_pkt_size must"
2298                             " be greater than zero");
2299
2300                 len = sizeof(clock_hz);
2301                 if (sysctlbyname("net.inet.ip.dummynet.hz", &clock_hz, &len,
2302                                  NULL, 0) == -1) {
2303                         errx(1, "sysctlbyname(\"%s\")",
2304                              "net.inet.ip.dummynet.hz");
2305                 }
2306
2307                 /*
2308                  * Ticks needed for sending a medium-sized packet.
2309                  * Unfortunately, when we are configuring a WF2Q+ queue, we
2310                  * do not have bandwidth information, because that is stored
2311                  * in the parent pipe, and also we have multiple queues
2312                  * competing for it. So we set s=0, which is not very
2313                  * correct. But on the other hand, why do we want RED with
2314                  * WF2Q+ ?
2315                  */
2316                 if (pipe.bandwidth==0) /* this is a WF2Q+ queue */
2317                         s = 0;
2318                 else
2319                         s = clock_hz * avg_pkt_size * 8 / pipe.bandwidth;
2320
2321                 /*
2322                  * max idle time (in ticks) before avg queue size becomes 0.
2323                  * NOTA:  (3/w_q) is approx the value x so that
2324                  * (1-w_q)^x < 10^-3.
2325                  */
2326                 w_q = ((double)pipe.fs.w_q) / (1 << SCALE_RED);
2327                 idle = s * 3. / w_q;
2328                 pipe.fs.lookup_step = (int)idle / lookup_depth;
2329                 if (!pipe.fs.lookup_step)
2330                         pipe.fs.lookup_step = 1;
2331                 weight = 1 - w_q;
2332                 for (t = pipe.fs.lookup_step; t > 0; --t)
2333                         weight *= weight;
2334                 pipe.fs.lookup_weight = (int)(weight * (1 << SCALE_RED));
2335         }
2336         i = setsockopt(s, IPPROTO_IP, IP_DUMMYNET_CONFIGURE, &pipe,
2337                             sizeof pipe);
2338         if (i)
2339                 err(1, "setsockopt(%s)", "IP_DUMMYNET_CONFIGURE");
2340 }
2341
2342 static void
2343 get_mac_addr_mask(char *p, u_char *addr, u_char *mask)
2344 {
2345         int i, l;
2346
2347         for (i=0; i<6; i++)
2348                 addr[i] = mask[i] = 0;
2349         if (!strcmp(p, "any"))
2350                 return;
2351
2352         for (i=0; *p && i<6;i++, p++) {
2353                 addr[i] = strtol(p, &p, 16);
2354                 if (*p != ':') /* we start with the mask */
2355                         break;
2356         }
2357         if (*p == '/') { /* mask len */
2358                 l = strtol(p+1, &p, 0);
2359                 for (i=0; l>0; l -=8, i++)
2360                         mask[i] = (l >=8) ? 0xff : (~0) << (8-l);
2361         } else if (*p == '&') { /* mask */
2362                 for (i=0, p++; *p && i<6;i++, p++) {
2363                         mask[i] = strtol(p, &p, 16);
2364                         if (*p != ':')
2365                                 break;
2366                 }
2367         } else if (*p == '\0') {
2368                 for (i=0; i<6; i++)
2369                         mask[i] = 0xff;
2370         }
2371         for (i=0; i<6; i++)
2372                 addr[i] &= mask[i];
2373 }
2374
2375 /*
2376  * helper function, updates the pointer to cmd with the length
2377  * of the current command, and also cleans up the first word of
2378  * the new command in case it has been clobbered before.
2379  */
2380 static ipfw_insn *
2381 next_cmd(ipfw_insn *cmd)
2382 {
2383         cmd += F_LEN(cmd);
2384         bzero(cmd, sizeof(*cmd));
2385         return cmd;
2386 }
2387
2388 /*
2389  * A function to fill simple commands of size 1.
2390  * Existing flags are preserved.
2391  */
2392 static void
2393 fill_cmd(ipfw_insn *cmd, enum ipfw_opcodes opcode, int flags, u_int16_t arg)
2394 {
2395         cmd->opcode = opcode;
2396         cmd->len =  ((cmd->len | flags) & (F_NOT | F_OR)) | 1;
2397         cmd->arg1 = arg;
2398 }
2399
2400 /*
2401  * Fetch and add the MAC address and type, with masks. This generates one or
2402  * two microinstructions, and returns the pointer to the last one.
2403  */
2404 static ipfw_insn *
2405 add_mac(ipfw_insn *cmd, int ac, char *av[])
2406 {
2407         ipfw_insn_mac *mac;
2408
2409         if (ac < 2)
2410                 errx(EX_DATAERR, "MAC dst src");
2411
2412         cmd->opcode = O_MACADDR2;
2413         cmd->len = (cmd->len & (F_NOT | F_OR)) | F_INSN_SIZE(ipfw_insn_mac);
2414
2415         mac = (ipfw_insn_mac *)cmd;
2416         get_mac_addr_mask(av[0], mac->addr, mac->mask); /* dst */
2417         get_mac_addr_mask(av[1], &(mac->addr[6]), &(mac->mask[6])); /* src */
2418         return cmd;
2419 }
2420
2421 static ipfw_insn *
2422 add_mactype(ipfw_insn *cmd, int ac, char *av)
2423 {
2424         if (ac < 1)
2425                 errx(EX_DATAERR, "missing MAC type");
2426         if (strcmp(av, "any") != 0) { /* we have a non-null type */
2427                 fill_newports((ipfw_insn_u16 *)cmd, av, IPPROTO_ETHERTYPE);
2428                 cmd->opcode = O_MAC_TYPE;
2429                 return cmd;
2430         } else
2431                 return NULL;
2432 }
2433
2434 static ipfw_insn *
2435 add_proto(ipfw_insn *cmd, char *av)
2436 {
2437         struct protoent *pe;
2438         u_char proto = 0;
2439
2440         if (!strncmp(av, "all", strlen(av)))
2441                 ; /* same as "ip" */
2442         else if ((proto = atoi(av)) > 0)
2443                 ; /* all done! */
2444         else if ((pe = getprotobyname(av)) != NULL)
2445                 proto = pe->p_proto;
2446         else
2447                 return NULL;
2448         if (proto != IPPROTO_IP)
2449                 fill_cmd(cmd, O_PROTO, 0, proto);
2450         return cmd;
2451 }
2452
2453 static ipfw_insn *
2454 add_srcip(ipfw_insn *cmd, char *av)
2455 {
2456         fill_ip((ipfw_insn_ip *)cmd, av);
2457         if (cmd->opcode == O_IP_DST_SET)                        /* set */
2458                 cmd->opcode = O_IP_SRC_SET;
2459         else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn))          /* me */
2460                 cmd->opcode = O_IP_SRC_ME;
2461         else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_u32))      /* one IP */
2462                 cmd->opcode = O_IP_SRC;
2463         else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_ip))       /* addr/mask */
2464                 cmd->opcode = O_IP_SRC_MASK;
2465         return cmd;
2466 }
2467
2468 static ipfw_insn *
2469 add_dstip(ipfw_insn *cmd, char *av)
2470 {
2471         fill_ip((ipfw_insn_ip *)cmd, av);
2472         if (cmd->opcode == O_IP_DST_SET)                        /* set */
2473                 ;
2474         else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn))          /* me */
2475                 cmd->opcode = O_IP_DST_ME;
2476         else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_u32))      /* one IP */
2477                 cmd->opcode = O_IP_DST;
2478         else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_ip))       /* addr/mask */
2479                 cmd->opcode = O_IP_DST_MASK;
2480         return cmd;
2481 }
2482
2483 static ipfw_insn *
2484 add_ports(ipfw_insn *cmd, char *av, u_char proto, int opcode)
2485 {
2486         if (!strncmp(av, "any", strlen(av))) {
2487                 return NULL;
2488         } else if (fill_newports((ipfw_insn_u16 *)cmd, av, proto)) {
2489                 /* XXX todo: check that we have a protocol with ports */
2490                 cmd->opcode = opcode;
2491                 return cmd;
2492         }
2493         return NULL;
2494 }
2495
2496 /*
2497  * Parse arguments and assemble the microinstructions which make up a rule.
2498  * Rules are added into the 'rulebuf' and then copied in the correct order
2499  * into the actual rule.
2500  *
2501  * The syntax for a rule starts with the action, followed by an
2502  * optional log action, and the various match patterns.
2503  * In the assembled microcode, the first opcode must be a O_PROBE_STATE
2504  * (generated if the rule includes a keep-state option), then the
2505  * various match patterns, the "log" action, and the actual action.
2506  *
2507  */
2508 static void
2509 add(int ac, char *av[])
2510 {
2511         /*
2512          * rules are added into the 'rulebuf' and then copied in
2513          * the correct order into the actual rule.
2514          * Some things that need to go out of order (prob, action etc.)
2515          * go into actbuf[].
2516          */
2517         static uint32_t rulebuf[IPFW_RULE_SIZE_MAX];
2518         static uint32_t actbuf[IPFW_RULE_SIZE_MAX];
2519         static uint32_t cmdbuf[IPFW_RULE_SIZE_MAX];
2520
2521         ipfw_insn *src, *dst, *cmd, *action, *prev = NULL;
2522         ipfw_insn *first_cmd;   /* first match pattern */
2523
2524         struct ipfw_ioc_rule *rule;
2525
2526         /*
2527          * various flags used to record that we entered some fields.
2528          */
2529         ipfw_insn *have_state = NULL;   /* check-state or keep-state */
2530
2531         int i;
2532
2533         int open_par = 0;       /* open parenthesis ( */
2534
2535         /* proto is here because it is used to fetch ports */
2536         u_char proto = IPPROTO_IP;      /* default protocol */
2537
2538         double match_prob = 1; /* match probability, default is always match */
2539
2540         bzero(actbuf, sizeof(actbuf));          /* actions go here */
2541         bzero(cmdbuf, sizeof(cmdbuf));
2542         bzero(rulebuf, sizeof(rulebuf));
2543
2544         rule = (struct ipfw_ioc_rule *)rulebuf;
2545         cmd = (ipfw_insn *)cmdbuf;
2546         action = (ipfw_insn *)actbuf;
2547
2548         av++; ac--;
2549
2550         /* [rule N]     -- Rule number optional */
2551         if (ac && isdigit(**av)) {
2552                 rule->rulenum = atoi(*av);
2553                 av++;
2554                 ac--;
2555         }
2556
2557         /* [set N]      -- set number (0..30), optional */
2558         if (ac > 1 && !strncmp(*av, "set", strlen(*av))) {
2559                 int set = strtoul(av[1], NULL, 10);
2560                 if (set < 0 || set > 30)
2561                         errx(EX_DATAERR, "illegal set %s", av[1]);
2562                 rule->set = set;
2563                 av += 2; ac -= 2;
2564         }
2565
2566         /* [prob D]     -- match probability, optional */
2567         if (ac > 1 && !strncmp(*av, "prob", strlen(*av))) {
2568                 match_prob = strtod(av[1], NULL);
2569
2570                 if (match_prob <= 0 || match_prob > 1)
2571                         errx(EX_DATAERR, "illegal match prob. %s", av[1]);
2572                 av += 2; ac -= 2;
2573         }
2574
2575         /* action       -- mandatory */
2576         NEED1("missing action");
2577         i = match_token(rule_actions, *av);
2578         ac--; av++;
2579         action->len = 1;        /* default */
2580         switch(i) {
2581         case TOK_CHECKSTATE:
2582                 have_state = action;
2583                 action->opcode = O_CHECK_STATE;
2584                 break;
2585
2586         case TOK_ACCEPT:
2587                 action->opcode = O_ACCEPT;
2588                 break;
2589
2590         case TOK_DENY:
2591                 action->opcode = O_DENY;
2592                 action->arg1 = 0;
2593                 break;
2594
2595         case TOK_REJECT:
2596                 action->opcode = O_REJECT;
2597                 action->arg1 = ICMP_UNREACH_HOST;
2598                 break;
2599
2600         case TOK_RESET:
2601                 action->opcode = O_REJECT;
2602                 action->arg1 = ICMP_REJECT_RST;
2603                 break;
2604
2605         case TOK_UNREACH:
2606                 action->opcode = O_REJECT;
2607                 NEED1("missing reject code");
2608                 fill_reject_code(&action->arg1, *av);
2609                 ac--; av++;
2610                 break;
2611
2612         case TOK_COUNT:
2613                 action->opcode = O_COUNT;
2614                 break;
2615
2616         case TOK_QUEUE:
2617         case TOK_PIPE:
2618                 action->len = F_INSN_SIZE(ipfw_insn_pipe);
2619         case TOK_SKIPTO:
2620                 if (i == TOK_QUEUE)
2621                         action->opcode = O_QUEUE;
2622                 else if (i == TOK_PIPE)
2623                         action->opcode = O_PIPE;
2624                 else if (i == TOK_SKIPTO)
2625                         action->opcode = O_SKIPTO;
2626                 NEED1("missing skipto/pipe/queue number");
2627                 action->arg1 = strtoul(*av, NULL, 10);
2628                 av++; ac--;
2629                 break;
2630
2631         case TOK_DIVERT:
2632         case TOK_TEE:
2633                 action->opcode = (i == TOK_DIVERT) ? O_DIVERT : O_TEE;
2634                 NEED1("missing divert/tee port");
2635                 action->arg1 = strtoul(*av, NULL, 0);
2636                 if (action->arg1 == 0) {
2637                         struct servent *s;
2638                         setservent(1);
2639                         s = getservbyname(av[0], "divert");
2640                         if (s != NULL)
2641                                 action->arg1 = ntohs(s->s_port);
2642                         else
2643                                 errx(EX_DATAERR, "illegal divert/tee port");
2644                 }
2645                 ac--; av++;
2646                 break;
2647
2648         case TOK_FORWARD: {
2649                 ipfw_insn_sa *p = (ipfw_insn_sa *)action;
2650                 char *s, *end;
2651
2652                 NEED1("missing forward address[:port]");
2653
2654                 action->opcode = O_FORWARD_IP;
2655                 action->len = F_INSN_SIZE(ipfw_insn_sa);
2656
2657                 p->sa.sin_len = sizeof(struct sockaddr_in);
2658                 p->sa.sin_family = AF_INET;
2659                 p->sa.sin_port = 0;
2660                 /*
2661                  * locate the address-port separator (':' or ',')
2662                  */
2663                 s = strchr(*av, ':');
2664                 if (s == NULL)
2665                         s = strchr(*av, ',');
2666                 if (s != NULL) {
2667                         *(s++) = '\0';
2668                         i = strtoport(s, &end, 0 /* base */, 0 /* proto */);
2669                         if (s == end)
2670                                 errx(EX_DATAERR,
2671                                     "illegal forwarding port ``%s''", s);
2672                         p->sa.sin_port = (u_short)i;
2673                 }
2674                 lookup_host(*av, &(p->sa.sin_addr));
2675                 }
2676                 ac--; av++;
2677                 break;
2678
2679         default:
2680                 errx(EX_DATAERR, "invalid action %s\n", av[-1]);
2681         }
2682         action = next_cmd(action);
2683
2684         /*
2685          * [log [logamount N]]  -- log, optional
2686          *
2687          * If exists, it goes first in the cmdbuf, but then it is
2688          * skipped in the copy section to the end of the buffer.
2689          */
2690         if (ac && !strncmp(*av, "log", strlen(*av))) {
2691                 ipfw_insn_log *c = (ipfw_insn_log *)cmd;
2692
2693                 cmd->len = F_INSN_SIZE(ipfw_insn_log);
2694                 cmd->opcode = O_LOG;
2695                 av++; ac--;
2696                 if (ac && !strncmp(*av, "logamount", strlen(*av))) {
2697                         ac--; av++;
2698                         NEED1("logamount requires argument");
2699                         c->max_log = atoi(*av);
2700                         if (c->max_log < 0)
2701                                 errx(EX_DATAERR, "logamount must be positive");
2702                         ac--; av++;
2703                 }
2704                 cmd = next_cmd(cmd);
2705         }
2706
2707         if (have_state) /* must be a check-state, we are done */
2708                 goto done;
2709
2710 #define OR_START(target)                                        \
2711         if (ac && (*av[0] == '(' || *av[0] == '{')) {           \
2712                 if (open_par)                                   \
2713                         errx(EX_USAGE, "nested \"(\" not allowed\n"); \
2714                 prev = NULL;                                    \
2715                 open_par = 1;                                   \
2716                 if ( (av[0])[1] == '\0') {                      \
2717                         ac--; av++;                             \
2718                 } else                                          \
2719                         (*av)++;                                \
2720         }                                                       \
2721         target:                                                 \
2722
2723
2724 #define CLOSE_PAR                                               \
2725         if (open_par) {                                         \
2726                 if (ac && (                                     \
2727                     !strncmp(*av, ")", strlen(*av)) ||          \
2728                     !strncmp(*av, "}", strlen(*av)) )) {        \
2729                         prev = NULL;                            \
2730                         open_par = 0;                           \
2731                         ac--; av++;                             \
2732                 } else                                          \
2733                         errx(EX_USAGE, "missing \")\"\n");      \
2734         }
2735
2736 #define NOT_BLOCK                                               \
2737         if (ac && !strncmp(*av, "not", strlen(*av))) {          \
2738                 if (cmd->len & F_NOT)                           \
2739                         errx(EX_USAGE, "double \"not\" not allowed\n"); \
2740                 cmd->len |= F_NOT;                              \
2741                 ac--; av++;                                     \
2742         }
2743
2744 #define OR_BLOCK(target)                                        \
2745         if (ac && !strncmp(*av, "or", strlen(*av))) {           \
2746                 if (prev == NULL || open_par == 0)              \
2747                         errx(EX_DATAERR, "invalid OR block");   \
2748                 prev->len |= F_OR;                              \
2749                 ac--; av++;                                     \
2750                 goto target;                                    \
2751         }                                                       \
2752         CLOSE_PAR;
2753
2754         first_cmd = cmd;
2755
2756 #if 0
2757         /*
2758          * MAC addresses, optional.
2759          * If we have this, we skip the part "proto from src to dst"
2760          * and jump straight to the option parsing.
2761          */
2762         NOT_BLOCK;
2763         NEED1("missing protocol");
2764         if (!strncmp(*av, "MAC", strlen(*av)) ||
2765             !strncmp(*av, "mac", strlen(*av))) {
2766                 ac--; av++;     /* the "MAC" keyword */
2767                 add_mac(cmd, ac, av); /* exits in case of errors */
2768                 cmd = next_cmd(cmd);
2769                 ac -= 2; av += 2;       /* dst-mac and src-mac */
2770                 NOT_BLOCK;
2771                 NEED1("missing mac type");
2772                 if (add_mactype(cmd, ac, av[0]))
2773                         cmd = next_cmd(cmd);
2774                 ac--; av++;     /* any or mac-type */
2775                 goto read_options;
2776         }
2777 #endif
2778
2779         /*
2780          * protocol, mandatory
2781          */
2782     OR_START(get_proto);
2783         NOT_BLOCK;
2784         NEED1("missing protocol");
2785         if (add_proto(cmd, *av)) {
2786                 av++; ac--;
2787                 if (F_LEN(cmd) == 0)    /* plain IP */
2788                         proto = 0;
2789                 else {
2790                         proto = cmd->arg1;
2791                         prev = cmd;
2792                         cmd = next_cmd(cmd);
2793                 }
2794         } else if (first_cmd != cmd) {
2795                 errx(EX_DATAERR, "invalid protocol ``%s''", *av);
2796         } else
2797                 goto read_options;
2798     OR_BLOCK(get_proto);
2799
2800         /*
2801          * "from", mandatory
2802          */
2803         if (!ac || strncmp(*av, "from", strlen(*av)))
2804                 errx(EX_USAGE, "missing ``from''");
2805         ac--; av++;
2806
2807         /*
2808          * source IP, mandatory
2809          */
2810     OR_START(source_ip);
2811         NOT_BLOCK;      /* optional "not" */
2812         NEED1("missing source address");
2813         if (add_srcip(cmd, *av)) {
2814                 ac--; av++;
2815                 if (F_LEN(cmd) != 0) {  /* ! any */
2816                         prev = cmd;
2817                         cmd = next_cmd(cmd);
2818                 }
2819         }
2820     OR_BLOCK(source_ip);
2821
2822         /*
2823          * source ports, optional
2824          */
2825         NOT_BLOCK;      /* optional "not" */
2826         if (ac) {
2827                 if (!strncmp(*av, "any", strlen(*av)) ||
2828                     add_ports(cmd, *av, proto, O_IP_SRCPORT)) {
2829                         ac--; av++;
2830                         if (F_LEN(cmd) != 0)
2831                                 cmd = next_cmd(cmd);
2832                 }
2833         }
2834
2835         /*
2836          * "to", mandatory
2837          */
2838         if (!ac || strncmp(*av, "to", strlen(*av)))
2839                 errx(EX_USAGE, "missing ``to''");
2840         av++; ac--;
2841
2842         /*
2843          * destination, mandatory
2844          */
2845     OR_START(dest_ip);
2846         NOT_BLOCK;      /* optional "not" */
2847         NEED1("missing dst address");
2848         if (add_dstip(cmd, *av)) {
2849                 ac--; av++;
2850                 if (F_LEN(cmd) != 0) {  /* ! any */
2851                         prev = cmd;
2852                         cmd = next_cmd(cmd);
2853                 }
2854         }
2855     OR_BLOCK(dest_ip);
2856
2857         /*
2858          * dest. ports, optional
2859          */
2860         NOT_BLOCK;      /* optional "not" */
2861         if (ac) {
2862                 if (!strncmp(*av, "any", strlen(*av)) ||
2863                     add_ports(cmd, *av, proto, O_IP_DSTPORT)) {
2864                         ac--; av++;
2865                         if (F_LEN(cmd) != 0)
2866                                 cmd = next_cmd(cmd);
2867                 }
2868         }
2869
2870 read_options:
2871         if (ac && first_cmd == cmd) {
2872                 /*
2873                  * nothing specified so far, store in the rule to ease
2874                  * printout later.
2875                  */
2876                  rule->usr_flags = IPFW_USR_F_NORULE;
2877         }
2878         prev = NULL;
2879         while (ac) {
2880                 char *s;
2881                 ipfw_insn_u32 *cmd32;   /* alias for cmd */
2882
2883                 s = *av;
2884                 cmd32 = (ipfw_insn_u32 *)cmd;
2885
2886                 if (*s == '!') {        /* alternate syntax for NOT */
2887                         if (cmd->len & F_NOT)
2888                                 errx(EX_USAGE, "double \"not\" not allowed\n");
2889                         cmd->len = F_NOT;
2890                         s++;
2891                 }
2892                 i = match_token(rule_options, s);
2893                 ac--; av++;
2894                 switch(i) {
2895                 case TOK_NOT:
2896                         if (cmd->len & F_NOT)
2897                                 errx(EX_USAGE, "double \"not\" not allowed\n");
2898                         cmd->len = F_NOT;
2899                         break;
2900
2901                 case TOK_OR:
2902                         if (open_par == 0 || prev == NULL)
2903                                 errx(EX_USAGE, "invalid \"or\" block\n");
2904                         prev->len |= F_OR;
2905                         break;
2906
2907                 case TOK_STARTBRACE:
2908                         if (open_par)
2909                                 errx(EX_USAGE, "+nested \"(\" not allowed\n");
2910                         open_par = 1;
2911                         break;
2912
2913                 case TOK_ENDBRACE:
2914                         if (!open_par)
2915                                 errx(EX_USAGE, "+missing \")\"\n");
2916                         open_par = 0;
2917                         prev = NULL;
2918                         break;
2919
2920                 case TOK_IN:
2921                         fill_cmd(cmd, O_IN, 0, 0);
2922                         break;
2923
2924                 case TOK_OUT:
2925                         cmd->len ^= F_NOT; /* toggle F_NOT */
2926                         fill_cmd(cmd, O_IN, 0, 0);
2927                         break;
2928
2929                 case TOK_FRAG:
2930                         fill_cmd(cmd, O_FRAG, 0, 0);
2931                         break;
2932
2933                 case TOK_LAYER2:
2934                         fill_cmd(cmd, O_LAYER2, 0, 0);
2935                         break;
2936
2937                 case TOK_XMIT:
2938                 case TOK_RECV:
2939                 case TOK_VIA:
2940                         NEED1("recv, xmit, via require interface name"
2941                                 " or address");
2942                         fill_iface((ipfw_insn_if *)cmd, av[0]);
2943                         ac--; av++;
2944                         if (F_LEN(cmd) == 0)    /* not a valid address */
2945                                 break;
2946                         if (i == TOK_XMIT)
2947                                 cmd->opcode = O_XMIT;
2948                         else if (i == TOK_RECV)
2949                                 cmd->opcode = O_RECV;
2950                         else if (i == TOK_VIA)
2951                                 cmd->opcode = O_VIA;
2952                         break;
2953
2954                 case TOK_ICMPTYPES:
2955                         NEED1("icmptypes requires list of types");
2956                         fill_icmptypes((ipfw_insn_u32 *)cmd, *av);
2957                         av++; ac--;
2958                         break;
2959
2960                 case TOK_IPTTL:
2961                         NEED1("ipttl requires TTL");
2962                         fill_cmd(cmd, O_IPTTL, 0, strtoul(*av, NULL, 0));
2963                         ac--; av++;
2964                         break;
2965
2966                 case TOK_IPID:
2967                         NEED1("ipid requires length");
2968                         fill_cmd(cmd, O_IPID, 0, strtoul(*av, NULL, 0));
2969                         ac--; av++;
2970                         break;
2971
2972                 case TOK_IPLEN:
2973                         NEED1("iplen requires length");
2974                         fill_cmd(cmd, O_IPLEN, 0, strtoul(*av, NULL, 0));
2975                         ac--; av++;
2976                         break;
2977
2978                 case TOK_IPVER:
2979                         NEED1("ipver requires version");
2980                         fill_cmd(cmd, O_IPVER, 0, strtoul(*av, NULL, 0));
2981                         ac--; av++;
2982                         break;
2983
2984                 case TOK_IPPRECEDENCE:
2985                         NEED1("ipprecedence requires value");
2986                         fill_cmd(cmd, O_IPPRECEDENCE, 0,
2987                             (strtoul(*av, NULL, 0) & 7) << 5);
2988                         ac--; av++;
2989                         break;
2990
2991                 case TOK_IPOPTS:
2992                         NEED1("missing argument for ipoptions");
2993                         fill_flags(cmd, O_IPOPT, f_ipopts, *av);
2994                         ac--; av++;
2995                         break;
2996
2997                 case TOK_IPTOS:
2998                         NEED1("missing argument for iptos");
2999                         fill_flags(cmd, O_IPTOS, f_iptos, *av);
3000                         ac--; av++;
3001                         break;
3002
3003                 case TOK_UID:
3004                         NEED1("uid requires argument");
3005                     {
3006                         char *end;
3007                         uid_t uid;
3008                         struct passwd *pwd;
3009
3010                         cmd->opcode = O_UID;
3011                         uid = strtoul(*av, &end, 0);
3012                         pwd = (*end == '\0') ? getpwuid(uid) : getpwnam(*av);
3013                         if (pwd == NULL)
3014                                 errx(EX_DATAERR, "uid \"%s\" nonexistent", *av);
3015                         cmd32->d[0] = pwd->pw_uid;
3016                         cmd->len = F_INSN_SIZE(ipfw_insn_u32);
3017                         ac--; av++;
3018                     }
3019                         break;
3020
3021                 case TOK_GID:
3022                         NEED1("gid requires argument");
3023                     {
3024                         char *end;
3025                         gid_t gid;
3026                         struct group *grp;
3027
3028                         cmd->opcode = O_GID;
3029                         gid = strtoul(*av, &end, 0);
3030                         grp = (*end == '\0') ? getgrgid(gid) : getgrnam(*av);
3031                         if (grp == NULL)
3032                                 errx(EX_DATAERR, "gid \"%s\" nonexistent", *av);
3033                         cmd32->d[0] = grp->gr_gid;
3034                         cmd->len = F_INSN_SIZE(ipfw_insn_u32);
3035                         ac--; av++;
3036                     }
3037                         break;
3038
3039                 case TOK_ESTAB:
3040                         fill_cmd(cmd, O_ESTAB, 0, 0);
3041                         break;
3042
3043                 case TOK_SETUP:
3044                         fill_cmd(cmd, O_TCPFLAGS, 0,
3045                                 (TH_SYN) | ( (TH_ACK) & 0xff) <<8 );
3046                         break;
3047
3048                 case TOK_TCPOPTS:
3049                         NEED1("missing argument for tcpoptions");
3050                         fill_flags(cmd, O_TCPOPTS, f_tcpopts, *av);
3051                         ac--; av++;
3052                         break;
3053
3054                 case TOK_TCPSEQ:
3055                 case TOK_TCPACK:
3056                         NEED1("tcpseq/tcpack requires argument");
3057                         cmd->len = F_INSN_SIZE(ipfw_insn_u32);
3058                         cmd->opcode = (i == TOK_TCPSEQ) ? O_TCPSEQ : O_TCPACK;
3059                         cmd32->d[0] = htonl(strtoul(*av, NULL, 0));
3060                         ac--; av++;
3061                         break;
3062
3063                 case TOK_TCPWIN:
3064                         NEED1("tcpwin requires length");
3065                         fill_cmd(cmd, O_TCPWIN, 0,
3066                             htons(strtoul(*av, NULL, 0)));
3067                         ac--; av++;
3068                         break;
3069
3070                 case TOK_TCPFLAGS:
3071                         NEED1("missing argument for tcpflags");
3072                         cmd->opcode = O_TCPFLAGS;
3073                         fill_flags(cmd, O_TCPFLAGS, f_tcpflags, *av);
3074                         ac--; av++;
3075                         break;
3076
3077                 case TOK_KEEPSTATE:
3078                         if (open_par)
3079                                 errx(EX_USAGE, "keep-state cannot be part "
3080                                     "of an or block");
3081                         if (have_state)
3082                                 errx(EX_USAGE, "only one of keep-state "
3083                                         "and limit is allowed");
3084                         have_state = cmd;
3085                         fill_cmd(cmd, O_KEEP_STATE, 0, 0);
3086                         break;
3087
3088                 case TOK_LIMIT:
3089                         if (open_par)
3090                                 errx(EX_USAGE, "limit cannot be part "
3091                                     "of an or block");
3092                         if (have_state)
3093                                 errx(EX_USAGE, "only one of keep-state "
3094                                         "and limit is allowed");
3095                         NEED1("limit needs mask and # of connections");
3096                         have_state = cmd;
3097                     {
3098                         ipfw_insn_limit *c = (ipfw_insn_limit *)cmd;
3099
3100                         cmd->len = F_INSN_SIZE(ipfw_insn_limit);
3101                         cmd->opcode = O_LIMIT;
3102                         c->limit_mask = 0;
3103                         c->conn_limit = 0;
3104                         for (; ac >1 ;) {
3105                                 int val;
3106
3107                                 val = match_token(limit_masks, *av);
3108                                 if (val <= 0)
3109                                         break;
3110                                 c->limit_mask |= val;
3111                                 ac--; av++;
3112                         }
3113                         c->conn_limit = atoi(*av);
3114                         if (c->conn_limit == 0)
3115                                 errx(EX_USAGE, "limit: limit must be >0");
3116                         if (c->limit_mask == 0)
3117                                 errx(EX_USAGE, "missing limit mask");
3118                         ac--; av++;
3119                     }
3120                         break;
3121
3122                 case TOK_PROTO:
3123                         NEED1("missing protocol");
3124                         if (add_proto(cmd, *av)) {
3125                                 proto = cmd->arg1;
3126                                 ac--; av++;
3127                         } else
3128                                 errx(EX_DATAERR, "invalid protocol ``%s''", *av);
3129                         break;
3130
3131                 case TOK_SRCIP:
3132                         NEED1("missing source IP");
3133                         if (add_srcip(cmd, *av)) {
3134                                 ac--; av++;
3135                         }
3136                         break;
3137
3138                 case TOK_DSTIP:
3139                         NEED1("missing destination IP");
3140                         if (add_dstip(cmd, *av)) {
3141                                 ac--; av++;
3142                         }
3143                         break;
3144
3145                 case TOK_SRCPORT:
3146                         NEED1("missing source port");
3147                         if (!strncmp(*av, "any", strlen(*av)) ||
3148                             add_ports(cmd, *av, proto, O_IP_SRCPORT)) {
3149                                 ac--; av++;
3150                         } else
3151                                 errx(EX_DATAERR, "invalid source port %s", *av);
3152                         break;
3153
3154                 case TOK_DSTPORT:
3155                         NEED1("missing destination port");
3156                         if (!strncmp(*av, "any", strlen(*av)) ||
3157                             add_ports(cmd, *av, proto, O_IP_DSTPORT)) {
3158                                 ac--; av++;
3159                         } else
3160                                 errx(EX_DATAERR, "invalid destination port %s",
3161                                     *av);
3162                         break;
3163
3164                 case TOK_MAC:
3165                         if (ac < 2)
3166                                 errx(EX_USAGE, "MAC dst-mac src-mac");
3167                         if (add_mac(cmd, ac, av)) {
3168                                 ac -= 2; av += 2;
3169                         }
3170                         break;
3171
3172                 case TOK_MACTYPE:
3173                         NEED1("missing mac type");
3174                         if (!add_mactype(cmd, ac, *av))
3175                                 errx(EX_DATAERR, "invalid mac type %s", *av);
3176                         ac--; av++;
3177                         break;
3178
3179                 default:
3180                         errx(EX_USAGE, "unrecognised option [%d] %s\n", i, s);
3181                 }
3182                 if (F_LEN(cmd) > 0) {   /* prepare to advance */
3183                         prev = cmd;
3184                         cmd = next_cmd(cmd);
3185                 }
3186         }
3187
3188 done:
3189         /*
3190          * Now copy stuff into the rule.
3191          * If we have a keep-state option, the first instruction
3192          * must be a PROBE_STATE (which is generated here).
3193          * If we have a LOG option, it was stored as the first command,
3194          * and now must be moved to the top of the action part.
3195          */
3196         dst = (ipfw_insn *)rule->cmd;
3197
3198         /*
3199          * First thing to write into the command stream is the match probability.
3200          */
3201         if (match_prob != 1) { /* 1 means always match */
3202                 dst->opcode = O_PROB;
3203                 dst->len = 2;
3204                 *((int32_t *)(dst+1)) = (int32_t)(match_prob * 0x7fffffff);
3205                 dst += dst->len;
3206         }
3207
3208         /*
3209          * generate O_PROBE_STATE if necessary
3210          */
3211         if (have_state && have_state->opcode != O_CHECK_STATE) {
3212                 fill_cmd(dst, O_PROBE_STATE, 0, 0);
3213                 dst = next_cmd(dst);
3214         }
3215         /*
3216          * copy all commands but O_LOG, O_KEEP_STATE, O_LIMIT
3217          */
3218         for (src = (ipfw_insn *)cmdbuf; src != cmd; src += i) {
3219                 i = F_LEN(src);
3220
3221                 switch (src->opcode) {
3222                 case O_LOG:
3223                 case O_KEEP_STATE:
3224                 case O_LIMIT:
3225                         break;
3226                 default:
3227                         bcopy(src, dst, i * sizeof(u_int32_t));
3228                         dst += i;
3229                 }
3230         }
3231
3232         /*
3233          * put back the have_state command as last opcode
3234          */
3235         if (have_state && have_state->opcode != O_CHECK_STATE) {
3236                 i = F_LEN(have_state);
3237                 bcopy(have_state, dst, i * sizeof(u_int32_t));
3238                 dst += i;
3239         }
3240         /*
3241          * start action section
3242          */
3243         rule->act_ofs = dst - rule->cmd;
3244
3245         /*
3246          * put back O_LOG if necessary
3247          */
3248         src = (ipfw_insn *)cmdbuf;
3249         if ( src->opcode == O_LOG ) {
3250                 i = F_LEN(src);
3251                 bcopy(src, dst, i * sizeof(u_int32_t));
3252                 dst += i;
3253         }
3254         /*
3255          * copy all other actions
3256          */
3257         for (src = (ipfw_insn *)actbuf; src != action; src += i) {
3258                 i = F_LEN(src);
3259                 bcopy(src, dst, i * sizeof(u_int32_t));
3260                 dst += i;
3261         }
3262
3263         rule->cmd_len = (u_int32_t *)dst - (u_int32_t *)(rule->cmd);
3264         i = (void *)dst - (void *)rule;
3265         if (getsockopt(s, IPPROTO_IP, IP_FW_ADD, rule, &i) == -1)
3266                 err(EX_UNAVAILABLE, "getsockopt(%s)", "IP_FW_ADD");
3267         if (!do_quiet)
3268                 show_ipfw(rule, 10, 10);
3269 }
3270
3271 static void
3272 zero(int ac, char *av[])
3273 {
3274         int rulenum;
3275         int failed = EX_OK;
3276
3277         av++; ac--;
3278
3279         if (!ac) {
3280                 /* clear all entries */
3281                 if (setsockopt(s, IPPROTO_IP, IP_FW_ZERO, NULL, 0) < 0)
3282                         err(EX_UNAVAILABLE, "setsockopt(%s)", "IP_FW_ZERO");
3283                 if (!do_quiet)
3284                         printf("Accounting cleared.\n");
3285
3286                 return;
3287         }
3288
3289         while (ac) {
3290                 /* Rule number */
3291                 if (isdigit(**av)) {
3292                         rulenum = atoi(*av);
3293                         av++;
3294                         ac--;
3295                         if (setsockopt(s, IPPROTO_IP,
3296                             IP_FW_ZERO, &rulenum, sizeof rulenum)) {
3297                                 warn("rule %u: setsockopt(IP_FW_ZERO)",
3298                                     rulenum);
3299                                 failed = EX_UNAVAILABLE;
3300                         } else if (!do_quiet)
3301                                 printf("Entry %d cleared\n", rulenum);
3302                 } else {
3303                         errx(EX_USAGE, "invalid rule number ``%s''", *av);
3304                 }
3305         }
3306         if (failed != EX_OK)
3307                 exit(failed);
3308 }
3309
3310 static void
3311 resetlog(int ac, char *av[])
3312 {
3313         int rulenum;
3314         int failed = EX_OK;
3315
3316         av++; ac--;
3317
3318         if (!ac) {
3319                 /* clear all entries */
3320                 if (setsockopt(s, IPPROTO_IP, IP_FW_RESETLOG, NULL, 0) < 0)
3321                         err(EX_UNAVAILABLE, "setsockopt(IP_FW_RESETLOG)");
3322                 if (!do_quiet)
3323                         printf("Logging counts reset.\n");
3324
3325                 return;
3326         }
3327
3328         while (ac) {
3329                 /* Rule number */
3330                 if (isdigit(**av)) {
3331                         rulenum = atoi(*av);
3332                         av++;
3333                         ac--;
3334                         if (setsockopt(s, IPPROTO_IP,
3335                             IP_FW_RESETLOG, &rulenum, sizeof rulenum)) {
3336                                 warn("rule %u: setsockopt(IP_FW_RESETLOG)",
3337                                     rulenum);
3338                                 failed = EX_UNAVAILABLE;
3339                         } else if (!do_quiet)
3340                                 printf("Entry %d logging count reset\n",
3341                                     rulenum);
3342                 } else {
3343                         errx(EX_DATAERR, "invalid rule number ``%s''", *av);
3344                 }
3345         }
3346         if (failed != EX_OK)
3347                 exit(failed);
3348 }
3349
3350 static void
3351 flush(void)
3352 {
3353         int cmd = do_pipe ? IP_DUMMYNET_FLUSH : IP_FW_FLUSH;
3354
3355         if (!do_force && !do_quiet) { /* need to ask user */
3356                 int c;
3357
3358                 printf("Are you sure? [yn] ");
3359                 fflush(stdout);
3360                 do {
3361                         c = toupper(getc(stdin));
3362                         while (c != '\n' && getc(stdin) != '\n')
3363                                 if (feof(stdin))
3364                                         return; /* and do not flush */
3365                 } while (c != 'Y' && c != 'N');
3366                 printf("\n");
3367                 if (c == 'N')   /* user said no */
3368                         return;
3369         }
3370         if (setsockopt(s, IPPROTO_IP, cmd, NULL, 0) < 0)
3371                 err(EX_UNAVAILABLE, "setsockopt(IP_%s_FLUSH)",
3372                     do_pipe ? "DUMMYNET" : "FW");
3373         if (!do_quiet)
3374                 printf("Flushed all %s.\n", do_pipe ? "pipes" : "rules");
3375 }
3376
3377 static int
3378 ipfw_main(int ac, char **av)
3379 {
3380         int ch;
3381
3382         if (ac == 1)
3383                 show_usage();
3384
3385         /* Set the force flag for non-interactive processes */
3386         do_force = !isatty(STDIN_FILENO);
3387
3388         optind = optreset = 1;
3389         while ((ch = getopt(ac, av, "hs:acdefNqStv")) != -1)
3390                 switch (ch) {
3391                 case 'h': /* help */
3392                         help();
3393                         break;  /* NOTREACHED */
3394
3395                 case 's': /* sort */
3396                         do_sort = atoi(optarg);
3397                         break;
3398                 case 'a':
3399                         do_acct = 1;
3400                         break;
3401                 case 'c':
3402                         do_compact = 1;
3403                         break;
3404                 case 'd':
3405                         do_dynamic = 1;
3406                         break;
3407                 case 'e':
3408                         do_expired = 1;
3409                         break;
3410                 case 'f':
3411                         do_force = 1;
3412                         break;
3413                 case 'N':
3414                         do_resolv = 1;
3415                         break;
3416                 case 'q':
3417                         do_quiet = 1;
3418                         break;
3419                 case 'S':
3420                         show_sets = 1;
3421                         break;
3422                 case 't':
3423                         do_time = 1;
3424                         break;
3425                 case 'v': /* verbose */
3426                         verbose++;
3427                         break;
3428                 default:
3429                         show_usage();
3430                 }
3431
3432         ac -= optind;
3433         av += optind;
3434         NEED1("bad arguments, for usage summary ``ipfw''");
3435
3436         /*
3437          * optional: pipe or queue
3438          */
3439         if (!strncmp(*av, "pipe", strlen(*av))) {
3440                 do_pipe = 1;
3441                 ac--;
3442                 av++;
3443         } else if (!strncmp(*av, "queue", strlen(*av))) {
3444                 do_pipe = 2;
3445                 ac--;
3446                 av++;
3447         }
3448         NEED1("missing command");
3449
3450         /*
3451          * for pipes and queues we normally say 'pipe NN config'
3452          * but the code is easier to parse as 'pipe config NN'
3453          * so we swap the two arguments.
3454          */
3455         if (do_pipe > 0 && ac > 1 && *av[0] >= '0' && *av[0] <= '9') {
3456                 char *p = av[0];
3457                 av[0] = av[1];
3458                 av[1] = p;
3459         }
3460         if (!strncmp(*av, "add", strlen(*av)))
3461                 add(ac, av);
3462         else if (do_pipe && !strncmp(*av, "config", strlen(*av)))
3463                 config_pipe(ac, av);
3464         else if (!strncmp(*av, "delete", strlen(*av)))
3465                 delete(ac, av);
3466         else if (!strncmp(*av, "flush", strlen(*av)))
3467                 flush();
3468         else if (!strncmp(*av, "zero", strlen(*av)))
3469                 zero(ac, av);
3470         else if (!strncmp(*av, "resetlog", strlen(*av)))
3471                 resetlog(ac, av);
3472         else if (!strncmp(*av, "print", strlen(*av)) ||
3473                  !strncmp(*av, "list", strlen(*av)))
3474                 list(ac, av);
3475         else if (!strncmp(*av, "enable", strlen(*av)))
3476                 sysctl_handler(ac, av, 1);
3477         else if (!strncmp(*av, "disable", strlen(*av)))
3478                 sysctl_handler(ac, av, 0);
3479         else if (!strncmp(*av, "set", strlen(*av)))
3480                 sets_handler(ac, av);
3481         else if (!strncmp(*av, "show", strlen(*av))) {
3482                 do_acct++;
3483                 list(ac, av);
3484         } else
3485                 errx(EX_USAGE, "bad command `%s'", *av);
3486         return 0;
3487 }
3488
3489
3490 static void
3491 ipfw_readfile(int ac, char *av[])
3492 {
3493 #define MAX_ARGS        32
3494 #define WHITESP         " \t\f\v\n\r"
3495         char    buf[BUFSIZ];
3496         char    *a, *p, *args[MAX_ARGS], *cmd = NULL;
3497         char    linename[10];
3498         int     i=0, lineno=0, qflag=0, pflag=0, status;
3499         FILE    *f = NULL;
3500         pid_t   preproc = 0;
3501         int     c;
3502
3503         while ((c = getopt(ac, av, "D:U:p:q")) != -1)
3504                 switch(c) {
3505                 case 'D':
3506                         if (!pflag)
3507                                 errx(EX_USAGE, "-D requires -p");
3508                         if (i > MAX_ARGS - 2)
3509                                 errx(EX_USAGE,
3510                                      "too many -D or -U options");
3511                         args[i++] = "-D";
3512                         args[i++] = optarg;
3513                         break;
3514
3515                 case 'U':
3516                         if (!pflag)
3517                                 errx(EX_USAGE, "-U requires -p");
3518                         if (i > MAX_ARGS - 2)
3519                                 errx(EX_USAGE,
3520                                      "too many -D or -U options");
3521                         args[i++] = "-U";
3522                         args[i++] = optarg;
3523                         break;
3524
3525                 case 'p':
3526                         pflag = 1;
3527                         cmd = optarg;
3528                         args[0] = cmd;
3529                         i = 1;
3530                         break;
3531
3532                 case 'q':
3533                         qflag = 1;
3534                         break;
3535
3536                 default:
3537                         errx(EX_USAGE, "bad arguments, for usage"
3538                              " summary ``ipfw''");
3539                 }
3540
3541         av += optind;
3542         ac -= optind;
3543         if (ac != 1)
3544                 errx(EX_USAGE, "extraneous filename arguments");
3545
3546         if ((f = fopen(av[0], "r")) == NULL)
3547                 err(EX_UNAVAILABLE, "fopen: %s", av[0]);
3548
3549         if (pflag) {
3550                 /* pipe through preprocessor (cpp or m4) */
3551                 int pipedes[2];
3552
3553                 args[i] = 0;
3554
3555                 if (pipe(pipedes) == -1)
3556                         err(EX_OSERR, "cannot create pipe");
3557
3558                 switch((preproc = fork())) {
3559                 case -1:
3560                         err(EX_OSERR, "cannot fork");
3561
3562                 case 0:
3563                         /* child */
3564                         if (dup2(fileno(f), 0) == -1
3565                             || dup2(pipedes[1], 1) == -1)
3566                                 err(EX_OSERR, "dup2()");
3567                         fclose(f);
3568                         close(pipedes[1]);
3569                         close(pipedes[0]);
3570                         execvp(cmd, args);
3571                         err(EX_OSERR, "execvp(%s) failed", cmd);
3572
3573                 default:
3574                         /* parent */
3575                         fclose(f);
3576                         close(pipedes[1]);
3577                         if ((f = fdopen(pipedes[0], "r")) == NULL) {
3578                                 int savederrno = errno;
3579
3580                                 kill(preproc, SIGTERM);
3581                                 errno = savederrno;
3582                                 err(EX_OSERR, "fdopen()");
3583                         }
3584                 }
3585         }
3586
3587         while (fgets(buf, BUFSIZ, f)) {
3588                 lineno++;
3589                 sprintf(linename, "Line %d", lineno);
3590                 args[0] = linename;
3591
3592                 if (*buf == '#')
3593                         continue;
3594                 if ((p = strchr(buf, '#')) != NULL)
3595                         *p = '\0';
3596                 i = 1;
3597                 if (qflag)
3598                         args[i++] = "-q";
3599                 for (a = strtok(buf, WHITESP);
3600                     a && i < MAX_ARGS; a = strtok(NULL, WHITESP), i++)
3601                         args[i] = a;
3602                 if (i == (qflag? 2: 1))
3603                         continue;
3604                 if (i == MAX_ARGS)
3605                         errx(EX_USAGE, "%s: too many arguments",
3606                             linename);
3607                 args[i] = NULL;
3608
3609                 ipfw_main(i, args);
3610         }
3611         fclose(f);
3612         if (pflag) {
3613                 if (waitpid(preproc, &status, 0) == -1)
3614                         errx(EX_OSERR, "waitpid()");
3615                 if (WIFEXITED(status) && WEXITSTATUS(status) != EX_OK)
3616                         errx(EX_UNAVAILABLE,
3617                             "preprocessor exited with status %d",
3618                             WEXITSTATUS(status));
3619                 else if (WIFSIGNALED(status))
3620                         errx(EX_UNAVAILABLE,
3621                             "preprocessor exited with signal %d",
3622                             WTERMSIG(status));
3623         }
3624 }
3625
3626 int
3627 main(int ac, char *av[])
3628 {
3629         s = socket(AF_INET, SOCK_RAW, IPPROTO_RAW);
3630         if (s < 0)
3631                 err(EX_UNAVAILABLE, "socket");
3632
3633         /*
3634          * If the last argument is an absolute pathname, interpret it
3635          * as a file to be preprocessed.
3636          */
3637
3638         if (ac > 1 && av[ac - 1][0] == '/' && access(av[ac - 1], R_OK) == 0)
3639                 ipfw_readfile(ac, av);
3640         else
3641                 ipfw_main(ac, av);
3642         return EX_OK;
3643 }