config/cfgroot/general-functions.pl

   1 # SmoothWall CGIs
   2 #
   3 # This code is distributed under the terms of the GPL
   4 #
   5 # (c) The SmoothWall Team
   6 # Copyright (C) 2002 Alex Hudson - getcgihash() rewrite
   7 # Copyright (C) 2002 Bob Grant <bob@cache.ucr.edu> - validmac()
   8 # Copyright (c) 2002/04/13 Steve Bootes - add alias section, helper functions
   9 # Copyright (c) 2002/08/23 Mark Wormgoor <mark@wormgoor.com> validfqdn()
  10 # Copyright (c) 2003/09/11 Darren Critchley <darrenc@telus.net> srtarray()
  11 #
  12 # $Id: general-functions.pl,v 1.1.2.26 2006/01/04 16:33:55 franck78 Exp $
  13 #
  14
  15 package General;
  16
  17 use strict;
  18 use Socket;
  19 use IO::Socket;
  20 use Locale::Codes::Country;
  21 use Net::SSLeay;
  22 use Net::IPv4Addr qw(:all);
  23 $|=1; # line buffering
  24
  25 $General::version = 'VERSION';
  26 $General::swroot = 'CONFIG_ROOT';
  27 $General::noipprefix = 'noipg-';
  28 $General::adminmanualurl = 'http://wiki.ipfire.org';
  29
  30 require "${General::swroot}/network-functions.pl";
  31
  32 #
  33 # log ("message") use default 'ipcop' tag
  34 # log ("tag","message") use your tag
  35 #
  36 sub log
  37 {
  38         my $tag='ipfire';
  39         $tag = shift if (@_>1);
  40         my $logmessage = $_[0];
  41         $logmessage =~ /([\w\W]*)/;
  42         $logmessage = $1;
  43         system('logger', '-t', $tag, $logmessage);
  44 }
  45 sub setup_default_networks
  46 {
  47         my %netsettings=();
  48         my $defaultNetworks = shift;
  49
  50         &readhash("/var/ipfire/ethernet/settings", \%netsettings);
  51
  52         # Get current defined networks (Red, Green, Blue, Orange)
  53         $defaultNetworks->{$Lang::tr{'fwhost any'}}{'IPT'} = "0.0.0.0/0.0.0.0";
  54         $defaultNetworks->{$Lang::tr{'fwhost any'}}{'NAME'} = "ALL";
  55
  56         $defaultNetworks->{$Lang::tr{'green'}}{'IPT'} = "$netsettings{'GREEN_NETADDRESS'}/$netsettings{'GREEN_NETMASK'}";
  57         $defaultNetworks->{$Lang::tr{'green'}}{'NET'} = "$netsettings{'GREEN_ADDRESS'}";
  58         $defaultNetworks->{$Lang::tr{'green'}}{'NAME'} = "GREEN";
  59
  60         if ($netsettings{'RED_DEV'} ne ''){
  61                 $defaultNetworks->{$Lang::tr{'fwdfw red'}}{'IPT'} = "$netsettings{'RED_NETADDRESS'}/$netsettings{'RED_NETMASK'}";
  62                 $defaultNetworks->{$Lang::tr{'fwdfw red'}}{'NET'} = "$netsettings{'RED_ADDRESS'}";
  63                 $defaultNetworks->{$Lang::tr{'fwdfw red'}}{'NAME'} = "RED";
  64         }
  65         if ($netsettings{'ORANGE_DEV'} ne ''){
  66                 $defaultNetworks->{$Lang::tr{'orange'}}{'IPT'} = "$netsettings{'ORANGE_NETADDRESS'}/$netsettings{'ORANGE_NETMASK'}";
  67                 $defaultNetworks->{$Lang::tr{'orange'}}{'NET'} = "$netsettings{'ORANGE_ADDRESS'}";
  68                 $defaultNetworks->{$Lang::tr{'orange'}}{'NAME'} = "ORANGE";
  69         }
  70
  71         if ($netsettings{'BLUE_DEV'} ne ''){
  72                 $defaultNetworks->{$Lang::tr{'blue'}}{'IPT'} = "$netsettings{'BLUE_NETADDRESS'}/$netsettings{'BLUE_NETMASK'}";
  73                 $defaultNetworks->{$Lang::tr{'blue'}}{'NET'} = "$netsettings{'BLUE_ADDRESS'}";
  74                 $defaultNetworks->{$Lang::tr{'blue'}}{'NAME'} = "BLUE";
  75         }
  76
  77         #IPFire himself
  78         $defaultNetworks->{'IPFire'}{'NAME'} = "IPFire";
  79
  80         # OpenVPN
  81         if(-e "${General::swroot}/ovpn/settings")
  82         {
  83                 my %ovpnSettings = ();
  84                 &readhash("${General::swroot}/ovpn/settings", \%ovpnSettings);
  85
  86                 # OpenVPN on Red?
  87                 if(defined($ovpnSettings{'DOVPN_SUBNET'}))
  88                 {
  89                         my ($ip,$sub) = split(/\//,$ovpnSettings{'DOVPN_SUBNET'});
  90                         $sub=&General::iporsubtocidr($sub);
  91                         my @tempovpnsubnet = split("\/", $ovpnSettings{'DOVPN_SUBNET'});
  92                         $defaultNetworks->{'OpenVPN ' ."($ip/$sub)"}{'ADR'} = $tempovpnsubnet[0];
  93                         $defaultNetworks->{'OpenVPN ' ."($ip/$sub)"}{'NAME'} = "OpenVPN-Dyn";
  94                 }
  95         } # end OpenVPN
  96         # IPsec RW NET
  97         if(-e "${General::swroot}/vpn/settings")
  98         {
  99                 my %ipsecsettings = ();
 100                 &readhash("${General::swroot}/vpn/settings", \%ipsecsettings);
 101                 if($ipsecsettings{'RW_NET'} ne '')
 102                 {
 103                         my ($ip,$sub) = split(/\//,$ipsecsettings{'RW_NET'});
 104                         $sub=&General::iporsubtocidr($sub);
 105                         my @tempipsecsubnet = split("\/", $ipsecsettings{'RW_NET'});
 106                         $defaultNetworks->{'IPsec RW (' .$ip."/".$sub.")"}{'ADR'} = $tempipsecsubnet[0];
 107                         $defaultNetworks->{'IPsec RW (' .$ip."/".$sub.")"}{'NAME'} = "IPsec RW";
 108                         $defaultNetworks->{'IPsec RW (' .$ip."/".$sub.")"}{'NET'} = &getnextip($ip);
 109                 }
 110         }
 111 }
 112 sub get_aliases
 113 {
 114
 115         my $defaultNetworks = shift;
 116         open(FILE, "${General::swroot}/ethernet/aliases") or die 'Unable to open aliases file.';
 117         my @current = <FILE>;
 118         close(FILE);
 119         my $ctr = 0;
 120         foreach my $line (@current)
 121         {
 122                 if ($line ne ''){
 123                         chomp($line);
 124                         my @temp = split(/\,/,$line);
 125                         if ($temp[2] eq '') {
 126                                 $temp[2] = "Alias $ctr : $temp[0]";
 127                         }
 128                         $defaultNetworks->{$temp[2]}{'IPT'} = "$temp[0]";
 129                         $defaultNetworks->{$temp[2]}{'NET'} = "$temp[0]";
 130
 131                         $ctr++;
 132                 }
 133         }
 134 }
 135
 136 sub readhash
 137 {
 138         my $filename = $_[0];
 139         my $hash = $_[1];
 140         my ($var, $val);
 141
 142
 143         # Some ipcop code expects that readhash 'complete' the hash if new entries
 144         # are presents. Not clear it !!!
 145         #%$hash = ();
 146
 147         open(FILE, $filename) or die "Unable to read file $filename";
 148
 149         while (<FILE>)
 150         {
 151                 chop;
 152                 ($var, $val) = split /=/, $_, 2;
 153                 if ($var)
 154                 {
 155                         $val =~ s/^\'//g;
 156                         $val =~ s/\'$//g;
 157
 158                         # Untaint variables read from hash
 159                         # trim space from begin and end
 160                         $var =~ s/^\s+//;
 161                         $var =~ s/\s+$//;
 162                         $var =~ /([A-Za-z0-9_-]*)/;
 163                         $var = $1;
 164                         $val =~ /([\w\W]*)/;
 165                         $val = $1;
 166                         $hash->{$var} = $val;
 167                 }
 168         }
 169         close FILE;
 170 }
 171
 172
 173 sub writehash
 174 {
 175         my $filename = $_[0];
 176         my $hash = $_[1];
 177         my ($var, $val);
 178
 179         # write cgi vars to the file.
 180         open(FILE, ">${filename}") or die "Unable to write file $filename";
 181         flock FILE, 2;
 182         foreach $var (keys %$hash)
 183         {
 184                 if ( $var eq "__CGI__"){next;}
 185                 $val = $hash->{$var};
 186                 # Darren Critchley Jan 17, 2003 added the following because when submitting with a graphic, the x and y
 187                 # location of the mouse are submitted as well, this was being written to the settings file causing
 188                 # some serious grief! This skips the variable.x and variable.y
 189                 if (!($var =~ /(.x|.y)$/)) {
 190                         if ($val =~ / /) {
 191                                 $val = "\'$val\'"; }
 192                         if (!($var =~ /^ACTION/)) {
 193                                 print FILE "${var}=${val}\n"; }
 194                 }
 195         }
 196         close FILE;
 197 }
 198
 199 sub writehashpart
 200 {
 201         # This function replaces the given hash in the original hash by keeping the old
 202         # content and just replacing the new content
 203
 204         my $filename = $_[0];
 205         my $newhash = $_[1];
 206         my %oldhash;
 207         my ($var, $val);
 208
 209         readhash("${filename}", \%oldhash);
 210
 211         foreach $var (keys %$newhash){
 212                 $oldhash{$var}=$newhash->{$var};
 213         }
 214
 215         # write cgi vars to the file.
 216         open(FILE, ">${filename}") or die "Unable to write file $filename";
 217         flock FILE, 2;
 218         foreach $var (keys %oldhash)
 219         {
 220                 if ( $var eq "__CGI__"){next;}
 221                 $val = $oldhash{$var};
 222                 # Darren Critchley Jan 17, 2003 added the following because when submitting with a graphic, the x and y
 223                 # location of the mouse are submitted as well, this was being written to the settings file causing
 224                 # some serious grief! This skips the variable.x and variable.y
 225                 if (!($var =~ /(.x|.y)$/)) {
 226                         if ($val =~ / /) {
 227                                 $val = "\'$val\'"; }
 228                         if (!($var =~ /^ACTION/)) {
 229                                 print FILE "${var}=${val}\n"; }
 230                 }
 231         }
 232         close FILE;
 233 }
 234
 235 sub age {
 236         my ($dev, $ino, $mode, $nlink, $uid, $gid, $rdev, $size,
 237                 $atime, $mtime, $ctime, $blksize, $blocks) = stat $_[0];
 238         my $totalsecs = time() - $mtime;
 239         my @s = ();
 240
 241         my $secs = $totalsecs % 60;
 242         $totalsecs /= 60;
 243         if ($secs > 0) {
 244                 push(@s, "${secs}s");
 245         }
 246
 247         my $min = $totalsecs % 60;
 248         $totalsecs /= 60;
 249         if ($min > 0) {
 250                 push(@s, "${min}m");
 251         }
 252
 253         my $hrs = $totalsecs % 24;
 254         $totalsecs /= 24;
 255         if ($hrs > 0) {
 256                 push(@s, "${hrs}h");
 257         }
 258
 259         my $days = int($totalsecs);
 260         if ($days > 0) {
 261                 push(@s, "${days}d");
 262         }
 263
 264         return join(" ", reverse(@s));
 265 }
 266
 267 sub validip
 268 {
 269         my $ip = $_[0];
 270
 271         if (!($ip =~ /^(\d+)\.(\d+)\.(\d+)\.(\d+)$/)) {
 272                 return 0; }
 273         else
 274         {
 275                 my @octets = ($1, $2, $3, $4);
 276                 foreach $_ (@octets)
 277                 {
 278                         if (/^0./) {
 279                                 return 0; }
 280                         if ($_ < 0 || $_ > 255) {
 281                                 return 0; }
 282                 }
 283                 return 1;
 284         }
 285 }
 286
 287 sub validmask {
 288         my $mask = shift;
 289
 290         return &Network::check_netmask($mask) || &Network::check_prefix($mask);
 291 }
 292
 293 sub validipormask
 294 {
 295         my $ipormask = $_[0];
 296
 297         # see if it is a IP only.
 298         if (&validip($ipormask)) {
 299                 return 1; }
 300         # split it into number and mask.
 301         if (!($ipormask =~ /^(.*?)\/(.*?)$/)) {
 302                 return 0; }
 303         my $ip = $1;
 304         my $mask = $2;
 305         # first part not a ip?
 306         if (!(&validip($ip))) {
 307                 return 0; }
 308         return &validmask($mask);
 309 }
 310
 311 sub subtocidr {
 312         return &Network::convert_netmask2prefix(shift);
 313 }
 314
 315 sub cidrtosub {
 316         return &Network::convert_prefix2netmask(shift);
 317 }
 318
 319 sub iporsubtodec
 320 {
 321         #Gets: Ip address or subnetmask in decimal oder CIDR
 322         #Gives: What it gets only in CIDR format
 323         my $subnet=$_[0];
 324         my $net;
 325         my $mask;
 326         my $full=0;
 327         if ($subnet =~ /^(.*?)\/(.*?)$/) {
 328                 ($net,$mask) = split (/\//,$subnet);
 329                 $full=1;
 330                 return "$subnet";
 331         }else{
 332                 $mask=$subnet;
 333         }
 334         #Subnet already in decimal and valid?
 335         if ($mask=~/^(\d{1,3})\.(\d{1,3})\.(\d{1,3})\.(\d{1,3})$/ &&(($1<=255  && $2<=$1 && $3<=$2  && $4<=$3 )))       {
 336                 for (my $i=0;$i<=32;$i++){
 337                         if (&General::cidrtosub($i) eq $mask){
 338                                 if ($full == 0){return $mask;}else{
 339                                                          return $net."/".$mask;
 340                                 }
 341                         }
 342                 }
 343         }
 344         #Subnet in binary format?
 345         if ($mask=~/^(\d{1,2})$/ && (($1<=32 && $1>=0))){
 346                         if($full == 0){ return &General::cidrtosub($mask);}else{
 347                                                  return $net."/".&General::cidrtosub($mask);
 348                         }
 349         }else{
 350                         return 3;
 351         }
 352         return 3;
 353 }
 354
 355
 356 sub iporsubtocidr
 357 {
 358         #gets: Ip Address  or subnetmask in decimal oder CIDR
 359         #Gives: What it gets only in CIDR format
 360         my $subnet=$_[0];
 361         my $net;
 362         my $mask;
 363         my $full=0;
 364         if ($subnet =~ /^(.*?)\/(.*?)$/) {
 365                 ($net,$mask) = split (/\//,$subnet);
 366                 $full=1;
 367         }else{
 368                 $mask=$subnet;
 369         }
 370         #Subnet in decimal and valid?
 371         if ($mask=~/^(\d{1,3})\.(\d{1,3})\.(\d{1,3})\.(\d{1,3})$/ &&(($1<=255  && $2<=$1 && $3<=$2  && $4<=$3 )))       {
 372                 for (my $i=0;$i<=32;$i++){
 373                         if (&General::cidrtosub($i) eq $mask){
 374                                 if ($full == 0){return &General::subtocidr($mask);}else{
 375                                                          return $net."/".&General::subtocidr($mask);
 376                                 }
 377                         }
 378                 }
 379         }
 380         #Subnet already in binary format?
 381         if ($mask=~/^(\d{1,2})$/ && (($1<=32 && $1>=0))){
 382                         if($full == 0){ return $mask;}else{
 383                                                  return $net."/".$mask;
 384                         }
 385         }else{
 386                         return 3;
 387         }
 388         return 3;
 389 }
 390
 391 sub getnetworkip {
 392         my $arg = join("/", @_);
 393
 394         return &Network::get_netaddress($arg);
 395 }
 396
 397 sub getccdbc
 398 {
 399         #Gets: IP in Form ("192.168.0.0/24")
 400         #Gives: Broadcastaddress of network
 401         my $ccdnet=$_;
 402         my ($ccdip,$ccdsubnet) = split "/",$ccdnet;
 403         my $ip_address_binary = inet_aton( $ccdip );
 404         my $netmask_binary    = ~pack("N", (2**(32-$ccdsubnet))-1);
 405         my $broadcast_address  = inet_ntoa( $ip_address_binary | ~$netmask_binary );
 406         return $broadcast_address;
 407 }
 408
 409 sub ip2dec  {
 410         return &Network::ip2bin(shift);
 411 }
 412
 413 sub dec2ip  {
 414         return &Network::bin2ip(shift);
 415 }
 416
 417 sub getnextip {
 418         return &Network::find_next_ip_address(shift, 4);
 419 }
 420
 421 sub getlastip {
 422         return &Network::find_next_ip_address(shift, -1);
 423 }
 424
 425 sub validipandmask
 426 {
 427         #Gets: Ip address in 192.168.0.0/24 or 192.168.0.0/255.255.255.0 and checks if subnet valid
 428         #Gives: True bzw 0 if success or false
 429         my $ccdnet=$_[0];
 430         my $subcidr;
 431
 432         if (!($ccdnet =~ /^(.*?)\/(.*?)$/)) {
 433                 return 0;
 434         }
 435         my ($ccdip,$ccdsubnet)=split (/\//, $ccdnet);
 436         #IP valid?
 437         if ($ccdip=~/^(\d{1,3})\.(\d{1,3})\.(\d{1,3})\.(\d{1,3})$/ &&(($1>0 && $1<=255 && $2>=0 && $2<=255 && $3>=0 && $3<=255 && $4<=255 ))) {
 438                 #Subnet in decimal and valid?
 439                 if ($ccdsubnet=~/^(\d{1,3})\.(\d{1,3})\.(\d{1,3})\.(\d{1,3})$/ &&(($1<=255  && $2<=$1 && $3<=$2  && $4<=$3 )))  {
 440                         for (my $i=0;$i<=32;$i++){
 441                                 if (&General::cidrtosub($i) eq $ccdsubnet){
 442                                         return 1;
 443                                 }
 444                         }
 445                 #Subnet already in binary format?
 446                 }elsif ($ccdsubnet=~/^(\d{1,2})$/ && (($1<=32 && $1>=0))){
 447                         return 1;
 448                 }else{
 449                         return 0;
 450                 }
 451
 452         }
 453         return 0;
 454 }
 455
 456 sub checksubnets
 457 {
 458         my %ccdconfhash=();
 459         my %ovpnconfhash=();
 460         my %vpnconf=();
 461         my %ipsecconf=();
 462         my %ownnet=();
 463         my %ovpnconf=();
 464         my @ccdconf=();
 465         my $ccdname=$_[0];
 466         my $ccdnet=$_[1];
 467         my $ownnet=$_[2];
 468         my $errormessage;
 469         my ($ip,$cidr)=split(/\//,$ccdnet);
 470         $cidr=&iporsubtocidr($cidr);
 471
 472         #get OVPN-Subnet (dynamic range)
 473         &readhash("${General::swroot}/ovpn/settings", \%ovpnconf);
 474         my ($ovpnip,$ovpncidr)= split (/\//,$ovpnconf{'DOVPN_SUBNET'});
 475         $ovpncidr=&iporsubtocidr($ovpncidr);
 476
 477         #check if we try to use same network as ovpn server
 478         if ("$ip/$cidr" eq "$ovpnip/$ovpncidr") {
 479                         $errormessage=$errormessage.$Lang::tr{'ccd err isovpnnet'}."<br>";
 480                         return $errormessage;
 481         }
 482
 483         #check if we try to use same network as another ovpn N2N
 484         if($ownnet ne 'ovpn'){
 485                 &readhasharray("${General::swroot}/ovpn/ovpnconfig", \%ovpnconfhash);
 486                 foreach my $key (keys %ovpnconfhash) {
 487                         if ($ovpnconfhash{$key}[3] eq 'net'){
 488                                 my @ovpnnet=split (/\//,$ovpnconfhash{$key}[11]);
 489                                 if (&IpInSubnet($ip,$ovpnnet[0],&iporsubtodec($ovpnnet[1]))){
 490                                         $errormessage=$errormessage.$Lang::tr{'ccd err isovpnn2n'}." $ovpnconfhash{$key}[1] <br>";
 491                                         return $errormessage;
 492                                 }
 493                         }
 494                 }
 495         }
 496
 497         #check if we use a network-name/subnet (static-ovpn) that already exists
 498         &readhasharray("${General::swroot}/ovpn/ccd.conf", \%ccdconfhash);
 499         foreach my $key (keys %ccdconfhash) {
 500                 @ccdconf=split(/\//,$ccdconfhash{$key}[1]);
 501                 if ($ccdname eq $ccdconfhash{$key}[0])
 502                 {
 503                         $errormessage=$errormessage.$Lang::tr{'ccd err nameexist'}."<br>";
 504                         return $errormessage;
 505                 }
 506                 my ($newip,$newsub) = split(/\//,$ccdnet);
 507                 if (&IpInSubnet($newip,$ccdconf[0],&iporsubtodec($ccdconf[1])))
 508                 {
 509                         $errormessage=$errormessage.$Lang::tr{'ccd err issubnet'}." $ccdconfhash{$key}[0]<br>";
 510                         return $errormessage;
 511                 }
 512         }
 513
 514         #check if we use a ipsec right network which is already defined
 515         if($ownnet ne 'ipsec'){
 516                 &General::readhasharray("${General::swroot}/vpn/config", \%ipsecconf);
 517                 foreach my $key (keys %ipsecconf){
 518                         if ($ipsecconf{$key}[11] ne ''){
 519                                 my ($ipsecip,$ipsecsub) = split (/\//, $ipsecconf{$key}[11]);
 520                                 $ipsecsub=&iporsubtodec($ipsecsub);
 521                                 if($ipsecconf{$key}[1] ne $ccdname){
 522                                         if ( &IpInSubnet ($ip,$ipsecip,$ipsecsub) ){
 523                                                 $errormessage=$Lang::tr{'ccd err isipsecnet'}." Name:  $ipsecconf{$key}[1]";
 524                                                 return $errormessage;
 525                                         }
 526                                 }
 527                         }
 528                 }
 529         }
 530
 531         #check if we use the ipsec RW Network (if defined)
 532         &readhash("${General::swroot}/vpn/settings", \%vpnconf);
 533         if ($vpnconf{'RW_NET'} ne ''){
 534                 my ($ipsecrwnet,$ipsecrwsub)=split (/\//, $vpnconf{'RW_NET'});
 535                 if (&IpInSubnet($ip,$ipsecrwnet,&iporsubtodec($ipsecrwsub)))
 536                 {
 537                         $errormessage=$errormessage.$Lang::tr{'ccd err isipsecrw'}."<br>";
 538                         return $errormessage;
 539                 }
 540         }
 541
 542         #check if we use one of ipfire's networks (green,orange,blue)
 543         &readhash("${General::swroot}/ethernet/settings", \%ownnet);
 544         if (($ownnet{'GREEN_NETADDRESS'}        ne '' && $ownnet{'GREEN_NETADDRESS'}    ne '0.0.0.0') && &IpInSubnet($ip,$ownnet{'GREEN_NETADDRESS'},&iporsubtodec($ownnet{'GREEN_NETMASK'}))){ $errormessage=$Lang::tr{'ccd err green'};return $errormessage;}
 545         if (($ownnet{'ORANGE_NETADDRESS'}       ne '' && $ownnet{'ORANGE_NETADDRESS'}   ne '0.0.0.0') && &IpInSubnet($ip,$ownnet{'ORANGE_NETADDRESS'},&iporsubtodec($ownnet{'ORANGE_NETMASK'}))){ $errormessage=$Lang::tr{'ccd err orange'};return $errormessage;}
 546         if (($ownnet{'BLUE_NETADDRESS'}         ne '' && $ownnet{'BLUE_NETADDRESS'}     ne '0.0.0.0') && &IpInSubnet($ip,$ownnet{'BLUE_NETADDRESS'},&iporsubtodec($ownnet{'BLUE_NETMASK'}))){ $errormessage=$Lang::tr{'ccd err blue'};return $errormessage;}
 547         if (($ownnet{'RED_NETADDRESS'}          ne '' && $ownnet{'RED_NETADDRESS'}              ne '0.0.0.0') && &IpInSubnet($ip,$ownnet{'RED_NETADDRESS'},&iporsubtodec($ownnet{'RED_NETMASK'}))){ $errormessage=$Lang::tr{'ccd err red'};return $errormessage;}
 548 }
 549
 550 sub check_net_internal{
 551         my $network=shift;
 552         my ($ip,$cidr)=split(/\//,$network);
 553         my %ownnet=();
 554         my $errormessage;
 555         $cidr=&iporsubtocidr($cidr);
 556         #check if we use one of ipfire's networks (green,orange,blue)
 557         &readhash("${General::swroot}/ethernet/settings", \%ownnet);
 558         if (($ownnet{'GREEN_NETADDRESS'}        ne '' && $ownnet{'GREEN_NETADDRESS'}    ne '0.0.0.0') && &IpInSubnet($ip,$ownnet{'GREEN_NETADDRESS'},&iporsubtodec($ownnet{'GREEN_NETMASK'}))){ $errormessage=$Lang::tr{'ccd err green'};return $errormessage;}
 559         if (($ownnet{'ORANGE_NETADDRESS'}       ne '' && $ownnet{'ORANGE_NETADDRESS'}   ne '0.0.0.0') && &IpInSubnet($ip,$ownnet{'ORANGE_NETADDRESS'},&iporsubtodec($ownnet{'ORANGE_NETMASK'}))){ $errormessage=$Lang::tr{'ccd err orange'};return $errormessage;}
 560         if (($ownnet{'BLUE_NETADDRESS'}         ne '' && $ownnet{'BLUE_NETADDRESS'}     ne '0.0.0.0') && &IpInSubnet($ip,$ownnet{'BLUE_NETADDRESS'},&iporsubtodec($ownnet{'BLUE_NETMASK'}))){ $errormessage=$Lang::tr{'ccd err blue'};return $errormessage;}
 561         if (($ownnet{'RED_NETADDRESS'}          ne '' && $ownnet{'RED_NETADDRESS'}              ne '0.0.0.0') && &IpInSubnet($ip,$ownnet{'RED_NETADDRESS'},&iporsubtodec($ownnet{'RED_NETMASK'}))){ $errormessage=$Lang::tr{'ccd err red'};return $errormessage;}
 562 }
 563
 564 sub validport
 565 {
 566         $_ = $_[0];
 567
 568         if (!/^\d+$/) {
 569                 return 0; }
 570         if (/^0./) {
 571                 return 0; }
 572         if ($_ >= 1 && $_ <= 65535) {
 573                 return 1; }
 574         return 0;
 575 }
 576
 577 sub validproxyport
 578 {
 579         $_ = $_[0];
 580
 581         if (!/^\d+$/) {
 582                 return 0; }
 583         if (/^0./) {
 584                 return 0; }
 585         if ($_ == 53 || $_ == 222 || $_ == 444 || $_ == 81 ) {
 586                 return 0; }
 587         elsif ($_ >= 1 && $_ <= 65535) {
 588                 return 1; }
 589         return 0;
 590 }
 591
 592 sub validmac
 593 {
 594         my $checkmac = $_[0];
 595         my $ot = '[0-9a-f]{2}'; # 2 Hex digits (one octet)
 596         if ($checkmac !~ /^$ot:$ot:$ot:$ot:$ot:$ot$/i)
 597         {
 598                 return 0;
 599         }
 600         return 1;
 601 }
 602
 603 sub validhostname
 604 {
 605         # Checks a hostname against RFC1035
 606         my $hostname = $_[0];
 607
 608         # Each part should be at least two characters in length
 609         # but no more than 63 characters
 610         if (length ($hostname) < 1 || length ($hostname) > 63) {
 611                 return 0;}
 612         # Only valid characters are a-z, A-Z, 0-9 and -
 613         if ($hostname !~ /^[a-zA-Z0-9-\s]*$/) {
 614                 return 0;}
 615         # First character can only be a letter or a digit
 616         if (substr ($hostname, 0, 1) !~ /^[a-zA-Z0-9]*$/) {
 617                 return 0;}
 618         # Last character can only be a letter or a digit
 619         if (substr ($hostname, -1, 1) !~ /^[a-zA-Z0-9]*$/) {
 620                 return 0;}
 621         return 1;
 622 }
 623
 624 sub validdomainname
 625 {
 626         my $part;
 627
 628         # Checks a domain name against RFC1035
 629         my $domainname = $_[0];
 630         my @parts = split (/\./, $domainname);  # Split hostname at the '.'
 631
 632         foreach $part (@parts) {
 633                 # Each part should be no more than 63 characters in length
 634                 if (length ($part) < 1 || length ($part) > 63) {
 635                         return 0;}
 636                 # Only valid characters are a-z, A-Z, 0-9, _ and -
 637                 if ($part !~ /^[a-zA-Z0-9_-]*$/) {
 638                         return 0;
 639                 }
 640         }
 641         return 1;
 642 }
 643
 644 sub validfqdn
 645 {
 646         my $part;
 647
 648         # Checks a fully qualified domain name against RFC1035
 649         my $fqdn = $_[0];
 650         my @parts = split (/\./, $fqdn);        # Split hostname at the '.'
 651         if (scalar(@parts) < 2) {               # At least two parts should
 652                 return 0;}                      # exist in a FQDN
 653                                                 # (i.e.hostname.domain)
 654         foreach $part (@parts) {
 655                 # Each part should be at least one character in length
 656                 # but no more than 63 characters
 657                 if (length ($part) < 1 || length ($part) > 63) {
 658                         return 0;}
 659                 # Only valid characters are a-z, A-Z, 0-9 and -
 660                 if ($part !~ /^[a-zA-Z0-9-]*$/) {
 661                         return 0;}
 662                 # First character can only be a letter or a digit
 663                 if (substr ($part, 0, 1) !~ /^[a-zA-Z0-9]*$/) {
 664                         return 0;}
 665                 # Last character can only be a letter or a digit
 666                 if (substr ($part, -1, 1) !~ /^[a-zA-Z0-9]*$/) {
 667                         return 0;}
 668         }
 669         return 1;
 670 }
 671
 672 sub validportrange # used to check a port range
 673 {
 674         my $port = $_[0]; # port values
 675         $port =~ tr/-/:/; # replace all - with colons just in case someone used -
 676         my $srcdst = $_[1]; # is it a source or destination port
 677
 678         if (!($port =~ /^(\d+)\:(\d+)$/)) {
 679
 680                 if (!(&validport($port))) {
 681                         if ($srcdst eq 'src'){
 682                                 return $Lang::tr{'source port numbers'};
 683                         } else  {
 684                                 return $Lang::tr{'destination port numbers'};
 685                         }
 686                 }
 687         }
 688         else
 689         {
 690                 my @ports = ($1, $2);
 691                 if ($1 >= $2){
 692                         if ($srcdst eq 'src'){
 693                                 return $Lang::tr{'bad source range'};
 694                         } else  {
 695                                 return $Lang::tr{'bad destination range'};
 696                         }
 697                 }
 698                 foreach $_ (@ports)
 699                 {
 700                         if (!(&validport($_))) {
 701                                 if ($srcdst eq 'src'){
 702                                         return $Lang::tr{'source port numbers'};
 703                                 } else  {
 704                                         return $Lang::tr{'destination port numbers'};
 705                                 }
 706                         }
 707                 }
 708                 return;
 709         }
 710 }
 711
 712 sub IpInSubnet {
 713         my $addr = shift;
 714         my $network = shift;
 715         my $netmask = shift;
 716
 717         return &Network::ip_address_in_network($addr, "$network/$netmask");
 718 }
 719
 720 #
 721 # Return the following IP (IP+1) in dotted notation.
 722 # Call: NextIP ('1.1.1.1');
 723 # Return: '1.1.1.2'
 724 #
 725 sub NextIP {
 726         return &Network::find_next_ip_address(shift, 1);
 727 }
 728
 729 sub NextIP2 {
 730         return &Network::find_next_ip_address(shift, 4);
 731 }
 732
 733 sub ipcidr {
 734         my ($ip,$cidr) = &Net::IPv4Addr::ipv4_parse(shift);
 735         return "$ip\/$cidr";
 736 }
 737
 738 sub ipcidr2msk {
 739        my ($ip,$cidr) = &Net::IPv4Addr::ipv4_parse(shift);
 740        my $netmask = &Net::IPv4Addr::ipv4_cidr2msk($cidr);
 741        return "$ip\/$netmask";
 742 }
 743
 744 sub validemail {
 745     my $address = shift;
 746     my @parts = split( /\@/, $address );
 747     my $count=@parts;
 748
 749     #check if we have one part before and after '@'
 750     return 0 if ( $count != 2 );
 751
 752     #check if one of the parts starts or ends with a dot
 753     return 0 if ( substr($parts[0],0,1) eq '.' );
 754     return 0 if ( substr($parts[0],-1,1) eq '.' );
 755     return 0 if ( substr($parts[1],0,1) eq '.' );
 756     return 0 if ( substr($parts[1],-1,1) eq '.' );
 757
 758     #check first addresspart (before '@' sign)
 759     return 0 if  ( $parts[0] !~ m/^[a-zA-Z0-9\.!\-\+#]+$/ );
 760
 761     #check second addresspart (after '@' sign)
 762     return 0 if  ( $parts[1] !~ m/^[a-zA-Z0-9\.\-]+$/ );
 763
 764     return 1;
 765 }
 766
 767 #
 768 # Currently only vpnmain use this three procs (readhasharray, writehasharray, findhasharray)
 769 # The 'key' used is numeric but is perfectly unneeded! This will to be removed so don't use
 770 # this code. Vpnmain will be splitted in parts: x509/pki, connection ipsec, connection other,... .
 771 #
 772 sub readhasharray {
 773     my ($filename, $hash) = @_;
 774     %$hash = ();
 775
 776     open(FILE, $filename) or die "Unable to read file $filename";
 777
 778     while (<FILE>) {
 779         my ($key, $rest, @temp);
 780         chomp;
 781         ($key, $rest) = split (/,/, $_, 2);
 782         if ($key =~ /^[0-9]+$/) {
 783             @temp = split (/,/, $rest);
 784             $hash->{$key} = \@temp;
 785         }
 786     }
 787     close FILE;
 788     return;
 789 }
 790
 791 sub writehasharray {
 792     my ($filename, $hash) = @_;
 793     my ($key, @temp, $i);
 794
 795     open(FILE, ">$filename") or die "Unable to write to file $filename";
 796
 797     foreach $key (keys %$hash) {
 798                 if ($key =~ /^[0-9]+$/) {
 799                         print FILE "$key";
 800                         foreach $i (0 .. $#{$hash->{$key}}) {
 801                                 print FILE ",$hash->{$key}[$i]";
 802                         }
 803                         print FILE "\n";
 804                 }
 805     }
 806     close FILE;
 807     return;
 808 }
 809
 810 sub findhasharraykey {
 811     foreach my $i (1 .. 1000000) {
 812         if ( ! exists $_[0]{$i}) {
 813              return $i;
 814         }
 815     }
 816 }
 817
 818 sub srtarray
 819 # Darren Critchley - darrenc@telus.net - (c) 2003
 820 # &srtarray(SortOrder, AlphaNumeric, SortDirection, ArrayToBeSorted)
 821 # This subroutine will take the following parameters:
 822 #   ColumnNumber = the column which you want to sort on, starts at 1
 823 #   AlphaNumberic = a or n (lowercase) defines whether the sort should be alpha or numberic
 824 #   SortDirection = asc or dsc (lowercase) Ascending or Descending sort
 825 #   ArrayToBeSorted = the array that wants sorting
 826 #
 827 #   Returns an array that is sorted to your specs
 828 #
 829 #   If SortOrder is greater than the elements in array, then it defaults to the first element
 830 #
 831 {
 832         my ($colno, $alpnum, $srtdir, @tobesorted) = @_;
 833         my @tmparray;
 834         my @srtedarray;
 835         my $line;
 836         my $newline;
 837         my $ctr;
 838         my $ttlitems = scalar @tobesorted; # want to know the number of rows in the passed array
 839         if ($ttlitems < 1){ # if no items, don't waste our time lets leave
 840                 return (@tobesorted);
 841         }
 842         my @tmp = split(/\,/,$tobesorted[0]);
 843         $ttlitems = scalar @tmp; # this should be the number of elements in each row of the passed in array
 844
 845         # Darren Critchley - validate parameters
 846         if ($colno > $ttlitems){$colno = '1';}
 847         $colno--; # remove one from colno to deal with arrays starting at 0
 848         if($colno < 0){$colno = '0';}
 849         if ($alpnum ne '') { $alpnum = lc($alpnum); } else { $alpnum = 'a'; }
 850         if ($srtdir ne '') { $srtdir = lc($srtdir); } else { $srtdir = 'src'; }
 851
 852         foreach $line (@tobesorted)
 853         {
 854                 chomp($line);
 855                 if ($line ne '') {
 856                         my @temp = split(/\,/,$line);
 857                         # Darren Critchley - juggle the fields so that the one we want to sort on is first
 858                         my $tmpholder = $temp[0];
 859                         $temp[0] = $temp[$colno];
 860                         $temp[$colno] = $tmpholder;
 861                         $newline = "";
 862                         for ($ctr=0; $ctr < $ttlitems ; $ctr++) {
 863                                 $newline=$newline . $temp[$ctr] . ",";
 864                         }
 865                         chop($newline);
 866                         push(@tmparray,$newline);
 867                 }
 868         }
 869         if ($alpnum eq 'n') {
 870                 @tmparray = sort {$a <=> $b} @tmparray;
 871         } else {
 872                 @tmparray = (sort @tmparray);
 873         }
 874         foreach $line (@tmparray)
 875         {
 876                 chomp($line);
 877                 if ($line ne '') {
 878                         my @temp = split(/\,/,$line);
 879                         my $tmpholder = $temp[0];
 880                         $temp[0] = $temp[$colno];
 881                         $temp[$colno] = $tmpholder;
 882                         $newline = "";
 883                         for ($ctr=0; $ctr < $ttlitems ; $ctr++){
 884                                 $newline=$newline . $temp[$ctr] . ",";
 885                         }
 886                         chop($newline);
 887                         push(@srtedarray,$newline);
 888                 }
 889         }
 890
 891         if ($srtdir eq 'dsc') {
 892                 @tmparray = reverse(@srtedarray);
 893                 return (@tmparray);
 894         } else {
 895                 return (@srtedarray);
 896         }
 897 }
 898
 899 sub FetchPublicIp {
 900     my %proxysettings;
 901     &General::readhash("${General::swroot}/proxy/settings", \%proxysettings);
 902     if ($_=$proxysettings{'UPSTREAM_PROXY'}) {
 903         my ($peer, $peerport) = (/^(?:[a-zA-Z ]+\:\/\/)?(?:[A-Za-z0-9\_\.\-]*?(?:\:[A-Za-z0-9\_\.\-]*?)?\@)?([a-zA-Z0-9\.\_\-]*?)(?:\:([0-9]{1,5}))?(?:\/.*?)?$/);
 904         Net::SSLeay::set_proxy($peer,$peerport,$proxysettings{'UPSTREAM_USER'},$proxysettings{'UPSTREAM_PASSWORD'} );
 905     }
 906     my $user_agent = &MakeUserAgent();
 907     my ($out, $response) = Net::SSLeay::get_http(  'checkip4.dns.lightningwirelabs.com',
 908                                                     80,
 909                                                     "/",
 910                                                     Net::SSLeay::make_headers('User-Agent' => $user_agent )
 911                                                 );
 912     if ($response =~ m%HTTP/1\.. 200 OK%) {
 913         $out =~ /Your IP address is: (\d+.\d+.\d+.\d+)/;
 914         return $1;
 915     }
 916     return '';
 917 }
 918
 919 #
 920 # Check if hostname.domain provided have IP provided
 921 # use gethostbyname to verify that
 922 # Params:
 923 #       IP
 924 #       hostname
 925 #       domain
 926 # Output
 927 #       1 IP matches host.domain
 928 #       0 not in sync
 929 #
 930 sub DyndnsServiceSync ($;$;$) {
 931
 932     my ($ip,$hostName,$domain) = @_;
 933     my @addresses;
 934
 935     #fix me no ip GROUP, what is the name ?
 936     $hostName =~ s/$General::noipprefix//;
 937     if ($hostName) { #may be empty
 938         $hostName = "$hostName.$domain";
 939         @addresses = gethostbyname($hostName);
 940     }
 941
 942     if ($addresses[0] eq '') {                  # nothing returned ?
 943         $hostName = $domain;                    # try resolving with domain only
 944         @addresses = gethostbyname($hostName);
 945     }
 946
 947     if ($addresses[0] ne '') {                  # got something ?
 948         #&General::log("name:$addresses[0], alias:$addresses[1]");
 949         # Build clear text list of IP
 950         @addresses = map ( &Socket::inet_ntoa($_), @addresses[4..$#addresses]);
 951         if (grep (/$ip/, @addresses)) {
 952             return 1;
 953         }
 954     }
 955     return 0;
 956 }
 957 #
 958 # This sub returns the red IP used to compare in DyndnsServiceSync
 959 #
 960 sub GetDyndnsRedIP {
 961     my %settings;
 962     &General::readhash("${General::swroot}/ddns/settings", \%settings);
 963
 964     open(IP, "${General::swroot}/red/local-ipaddress") or return 'unavailable';
 965     my $ip = <IP>;
 966     close(IP);
 967     chomp $ip;
 968
 969     # 100.64.0.0/10 is reserved for dual-stack lite (http://tools.ietf.org/html/rfc6598).
 970     if (&General::IpInSubnet ($ip,'10.0.0.0','255.0.0.0') ||
 971         &General::IpInSubnet ($ip,'172.16.0.0.','255.240.0.0') ||
 972         &General::IpInSubnet ($ip,'192.168.0.0','255.255.0.0') ||
 973         &General::IpInSubnet ($ip,'100.64.0.0', '255.192.0.0'))
 974     {
 975         if ($settings{'BEHINDROUTER'} eq 'FETCH_IP') {
 976             my $RealIP = &General::FetchPublicIp;
 977             $ip = (&General::validip ($RealIP) ?  $RealIP : 'unavailable');
 978         }
 979     }
 980     return $ip;
 981 }
 982
 983 # Translate ICMP code to text
 984 # ref: http://www.iana.org/assignments/icmp-parameters
 985 sub GetIcmpDescription ($) {
 986     my $index = shift;
 987     my @icmp_description = (
 988     'Echo Reply',                       #0
 989     'Unassigned',
 990     'Unassigned',
 991     'Destination Unreachable',
 992     'Source Quench',
 993     'Redirect',
 994     'Alternate Host Address',
 995     'Unassigned',
 996     'Echo',
 997     'Router Advertisement',
 998     'Router Solicitation',              #10
 999     'Time Exceeded',
1000     'Parameter Problem',
1001     'Timestamp',
1002     'Timestamp Reply',
1003     'Information Request',
1004     'Information Reply',
1005     'Address Mask Request',
1006     'Address Mask Reply',
1007     'Reserved (for Security)',
1008     'Reserved (for Robustness Experiment)', #20
1009     'Reserved',
1010     'Reserved',
1011     'Reserved',
1012     'Reserved',
1013     'Reserved',
1014     'Reserved',
1015     'Reserved',
1016     'Reserved',
1017     'Reserved',
1018     'Traceroute',                               #30
1019     'Datagram Conversion Error',
1020     'Mobile Host Redirect',
1021     'IPv6 Where-Are-You',
1022     'IPv6 I-Am-Here',
1023     'Mobile Registration Request',
1024     'Mobile Registration Reply',
1025     'Domain Name Request',
1026     'Domain Name Reply',
1027     'SKIP',
1028     'Photur',                           #40
1029     'Experimental');
1030     if ($index>41) {return 'unknown'} else {return $icmp_description[$index]};
1031 }
1032
1033 sub GetCoreUpdateVersion() {
1034         my $core_update;
1035
1036         open(FILE, "/opt/pakfire/db/core/mine");
1037         while (<FILE>) {
1038                 $core_update = $_;
1039                 last;
1040         }
1041         close(FILE);
1042
1043         return $core_update;
1044 }
1045
1046 sub MakeUserAgent() {
1047         my $user_agent = "IPFire/$General::version";
1048
1049         my $core_update = &GetCoreUpdateVersion();
1050         if ($core_update ne "") {
1051                 $user_agent .= "/$core_update";
1052         }
1053
1054         return $user_agent;
1055 }
1056
1057 sub RedIsWireless() {
1058         # This function checks if a network device is a wireless device.
1059
1060         my %settings = ();
1061         &readhash("${General::swroot}/ethernet/settings", \%settings);
1062
1063         # Find the name of the network device.
1064         my $device = $settings{'RED_DEV'};
1065
1066         # Exit, if no device is configured.
1067         return 0 if ($device eq "");
1068
1069         # Return 1 if the device is a wireless one.
1070         my $path = "/sys/class/net/$device/wireless";
1071         if (-d $path) {
1072                 return 1;
1073         }
1074
1075         # Otherwise return zero.
1076         return 0;
1077 }
1078
1079 # Function to read a file with UTF-8 charset.
1080 sub read_file_utf8 ($) {
1081         my ($file) = @_;
1082
1083         open my $in, '<:encoding(UTF-8)', $file or die "Could not open '$file' for reading $!";
1084         local $/ = undef;
1085         my $all = <$in>;
1086         close $in;
1087
1088         return $all;
1089 }
1090
1091 # Function to write a file with UTF-8 charset.
1092 sub write_file_utf8 ($) {
1093         my ($file, $content) = @_;
1094
1095         open my $out, '>:encoding(UTF-8)', $file or die "Could not open '$file' for writing $!";;
1096         print $out $content;
1097         close $out;
1098
1099         return;
1100 }
1101
1102 my $FIREWALL_RELOAD_INDICATOR = "${General::swroot}/firewall/reread";
1103
1104 sub firewall_config_changed() {
1105         open FILE, ">$FIREWALL_RELOAD_INDICATOR" or die "Could not open $FIREWALL_RELOAD_INDICATOR";
1106         close FILE;
1107 }
1108
1109 sub firewall_needs_reload() {
1110         if (-e "$FIREWALL_RELOAD_INDICATOR") {
1111                 return 1;
1112         }
1113
1114         return 0;
1115 }
1116
1117 sub firewall_reload() {
1118         system("/usr/local/bin/firewallctrl");
1119 }
1120
1121 # Function which will return the used interface for the red network zone (red0, ppp0, etc).
1122 sub get_red_interface() {
1123
1124         open(IFACE, "${General::swroot}/red/iface") or die "Could not open /var/ipfire/red/iface";
1125
1126         my $interface = <IFACE>;
1127         close(IFACE);
1128         chomp $interface;
1129
1130         return $interface;
1131 }
1132
1133 1;