html/cgi-bin/captive.cgi

   1 #!/usr/bin/perl
   2 ###############################################################################
   3 #                                                                             #
   4 # IPFire.org - A linux based firewall                                         #
   5 # Copyright (C) 2016  IPFire Team  <alexander.marx@ipfire.org>                #
   6 #                                                                             #
   7 # This program is free software: you can redistribute it and/or modify        #
   8 # it under the terms of the GNU General Public License as published by        #
   9 # the Free Software Foundation, either version 3 of the License, or           #
  10 # (at your option) any later version.                                         #
  11 #                                                                             #
  12 # This program is distributed in the hope that it will be useful,             #
  13 # but WITHOUT ANY WARRANTY; without even the implied warranty of              #
  14 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the               #
  15 # GNU General Public License for more details.                                #
  16 #                                                                             #
  17 # You should have received a copy of the GNU General Public License           #
  18 # along with this program.  If not, see <http://www.gnu.org/licenses/>.       #
  19 #                                                                             #
  20 ###############################################################################
  21
  22 #use strict;
  23 use HTML::Entities();
  24 use File::Basename;
  25
  26 # enable only the following on debugging purpose
  27 #use warnings;
  28 #use CGI::Carp 'fatalsToBrowser';
  29
  30 require '/var/ipfire/general-functions.pl';
  31 require "${General::swroot}/lang.pl";
  32 require "${General::swroot}/header.pl";
  33
  34 my %settings=();
  35 my %mainsettings;
  36 my %color;
  37 my %cgiparams=();
  38 my %netsettings=();
  39 my %checked=();
  40 my $errormessage='';
  41 my $voucherout="${General::swroot}/captive/voucher_out";
  42 my $clients="${General::swroot}/captive/clients";
  43 my %voucherhash=();
  44 my %clientshash=();
  45 my $settingsfile="${General::swroot}/captive/settings";
  46 my $logopath = "/srv/web/ipfire/html/captive/logo";
  47 unless (-e $settingsfile)       { system("touch $settingsfile"); }
  48 unless (-e $voucherout) { system("touch $voucherout"); }
  49
  50 &Header::getcgihash(\%cgiparams);
  51
  52 &General::readhash("${General::swroot}/main/settings", \%mainsettings);
  53 &General::readhash("/srv/web/ipfire/html/themes/".$mainsettings{'THEME'}."/include/colors.txt", \%color);
  54 &General::readhash("$settingsfile", \%settings) if(-f $settingsfile);
  55 &General::readhash("${General::swroot}/ethernet/settings", \%netsettings);
  56
  57 &Header::showhttpheaders();
  58
  59 #actions
  60 if ($cgiparams{'ACTION'} eq "$Lang::tr{'save'}"){
  61         #Check Expiretime
  62         if($cgiparams{'EXP_HOUR'}+$cgiparams{'EXP_DAY'}+$cgiparams{'EXP_WEEK'}+$cgiparams{'EXP_MONTH'} == 0 && $cgiparams{'UNLIMITED'} == ''){
  63                 $errormessage=$Lang::tr{'Captive noexpiretime'};
  64         }
  65
  66         my $file = $cgiparams{'uploaded_file'};
  67         if ($file){
  68                 #Check if extension is png
  69                 chomp $file;
  70                 my ($name, $path, $ext) = fileparse($file, qr/\.[^.]*$/);
  71                 if ($ext ne ".png"){
  72                         $errormessage=$Lang::tr{'Captive wrong ext'};
  73                 }
  74         }
  75
  76         $settings{'ENABLE_GREEN'}               = $cgiparams{'ENABLE_GREEN'};
  77         $settings{'ENABLE_BLUE'}                = $cgiparams{'ENABLE_BLUE'};
  78         $settings{'AUTH'}                               = $cgiparams{'AUTH'};
  79         $settings{'EXPIRE'}                             = $cgiparams{'EXP_HOUR'}+$cgiparams{'EXP_DAY'}+$cgiparams{'EXP_WEEK'}+$cgiparams{'EXP_MONTH'};
  80         $settings{'EXP_HOUR'}                   = $cgiparams{'EXP_HOUR'};
  81         $settings{'EXP_DAY'}                    = $cgiparams{'EXP_DAY'};
  82         $settings{'EXP_WEEK'}                   = $cgiparams{'EXP_WEEK'};
  83         $settings{'EXP_MONTH'}                  = $cgiparams{'EXP_MONTH'};
  84         $settings{'TITLE'}                              = $cgiparams{'TITLE'};
  85         $settings{'UNLIMITED'}                  = $cgiparams{'UNLIMITED'};
  86
  87         if (!$errormessage){
  88                 #Check if we need to upload a new logo
  89                 if($file){
  90                         #Save File
  91                         my ($filehandle) = CGI::upload('uploaded_file');
  92                         open (UPLOADFILE, ">$logopath/logo.png");
  93                         binmode $filehandle;
  94                         while ( <$filehandle> ) {
  95                                 print UPLOADFILE;
  96                         }
  97                         close (UPLOADFILE);
  98
  99                         #Open file to check if dimensions are within rang
 100                         open (PNG , "<$logopath/logo.png");
 101                         local $/;
 102                         my $PNG1=<PNG>;
 103                         close(PNG);
 104                         my ($width,$height)=&pngsize($PNG1);
 105                         if($width > 1920 || $height > 800 || $width < 1280 || $height < 400){
 106                                 $errormessage.="$Lang::tr{'Captive invalid logosize'} <br>Filedimensions width: $width  height: $height ";
 107                                 unlink("$logopath/logo.png");
 108                         }
 109                 }
 110
 111                 #saves the Captiveportal settings to disk
 112                 if ($cgiparams{'UNLIMITED'} eq 'on'){
 113                         $cgiparams{'EXP_HOUR'}  = '0';
 114                         $cgiparams{'EXP_DAY'}   = '0';
 115                         $cgiparams{'EXP_WEEK'}  = '0';
 116                         $cgiparams{'EXP_MONTH'} = '0';
 117                 }
 118
 119                 &General::writehash("$settingsfile", \%settings);
 120
 121                 #write Licensetext if defined
 122                 if ($cgiparams{'AGB'}){
 123                         $cgiparams{'AGB'} = &Header::escape($cgiparams{'AGB'});
 124                         open( FH, ">:utf8", "/var/ipfire/captive/agb.txt" ) or die("$!");
 125                         print FH $cgiparams{'AGB'};
 126                         close( FH );
 127                         $cgiparams{'AGB'}="";
 128                 }
 129                 #execute binary to reload firewall rules
 130                 system("/usr/local/bin/captivectrl");
 131
 132                 if ($cgiparams{'ENABLE_BLUE'} eq 'on'){
 133                                 system("/usr/local/bin/wirelessctrl");
 134                 }
 135         }
 136 }
 137
 138 if ($cgiparams{'ACTION'} eq "$Lang::tr{'Captive voucherout'}"){
 139         #generates a voucher and writes it to /var/ipfire/voucher_out
 140
 141         #check if we already have a voucher with same code
 142         &General::readhasharray("$voucherout", \%voucherhash);
 143         foreach my $key (keys %voucherhash) {
 144                 if($voucherhash{$key}[1] eq $cgiparams{'CODE'}){
 145                         $errormessage=$Lang::tr{'Captive err doublevoucher'};
 146                         last;
 147                 }
 148         }
 149
 150         #check valid remark
 151         if ($cgiparams{'REMARK'} ne '' && !&validremark($cgiparams{'REMARK'})){
 152                 $errormessage=$Lang::tr{'fwhost err remark'};
 153         }
 154
 155         #if no error detected, write to disk
 156         if (!$errormessage){
 157                 my $date=time(); #seconds in utc
 158
 159                 #first get new key from hash
 160                 my $key=&General::findhasharraykey (\%voucherhash);
 161                 #initialize all fields with ''
 162                 foreach my $i (0 .. 3) { $voucherhash{$key}[$i] = "";}
 163                 #define fields
 164                 $voucherhash{$key}[0] = $date;
 165                 $voucherhash{$key}[1] = $cgiparams{'CODE'};
 166                 $voucherhash{$key}[2] = $settings{'EXPIRE'};
 167                 $voucherhash{$key}[3] = $cgiparams{'REMARK'};
 168                 #write values to disk
 169                 &General::writehasharray("$voucherout", \%voucherhash);
 170
 171                 #now prepare log entry, get expiring date for voucher and decode remark for logfile
 172                 my $expdate=localtime(time()+$voucherhash{$key}[3]);
 173                 my $rem=HTML::Entities::decode_entities($voucherhash{$key}[4]);
 174
 175                 #write logfile entry
 176                 &General::log("Captive", "Generated new voucher $voucherhash{$key}[1] $voucherhash{$key}[2] hours valid expires on $expdate remark $rem");
 177         }
 178 }
 179
 180 if ($cgiparams{'ACTION'} eq 'delvoucherout'){
 181         #deletes an already generated but unused voucher
 182
 183         #read all generated vouchers
 184         &General::readhasharray("$voucherout", \%voucherhash);
 185         foreach my $key (keys %voucherhash) {
 186                 if($cgiparams{'key'} eq $voucherhash{$key}[0]){
 187                         #write logenty with decoded remark
 188                         my $rem=HTML::Entities::decode_entities($voucherhash{$key}[4]);
 189                         &General::log("Captive", "Delete unused voucher $voucherhash{$key}[1] $voucherhash{$key}[2] hours valid expires on $voucherhash{$key}[3] remark $rem");
 190                         #delete line from hash
 191                         delete $voucherhash{$key};
 192                         last;
 193                 }
 194         }
 195         #write back hash
 196         &General::writehasharray("$voucherout", \%voucherhash);
 197 }
 198
 199 if ($cgiparams{'ACTION'} eq 'delvoucherinuse'){
 200         #delete voucher and connection in use
 201
 202         #read all active clients
 203         &General::readhasharray("$clients", \%clientshash);
 204         foreach my $key (keys %clientshash) {
 205                 if($cgiparams{'key'} eq $clientshash{$key}[0]){
 206                         #prepare log entry with decoded remark
 207                         my $rem=HTML::Entities::decode_entities($clientshash{$key}[7]);
 208                         #write logentry
 209                         &General::log("Captive", "Delete voucher in use $clientshash{$key}[1] $clientshash{$key}[2] hours valid expires on $clientshash{$key}[3] remark $rem - Connection will be terminated");
 210                         #delete line from hash
 211                         delete $clientshash{$key};
 212                         last;
 213                 }
 214         }
 215         #write back hash
 216         &General::writehasharray("$clients", \%clientshash);
 217         #reload firewallrules to kill connection of client
 218         system("/usr/local/bin/captivectrl");
 219 }
 220
 221 #open webpage, print header and open box
 222 &Header::openpage($Lang::tr{'Captive menu'}, 1, '');
 223 &Header::openbigbox();
 224
 225 #call error() to see if we have to print an errormessage on website
 226 &error();
 227
 228 #call config() to display the configuration box
 229 &config();
 230
 231 sub getagb(){
 232         #open textfile from /var/ipfire/captive/agb.txt
 233         open( my $handle, "<:utf8", "/var/ipfire/captive/agb.txt" ) or die("$!");
 234                 while(<$handle>){
 235                         #read line by line and print on screen
 236                         $cgiparams{'AGB'}.= HTML::Entities::decode_entities($_);
 237                 }
 238         close( $handle );
 239 }
 240
 241 sub config(){
 242         #prints the config box on the website
 243         &Header::openbox('100%', 'left', $Lang::tr{'Captive config'});
 244         print <<END
 245                 <form method='post' action='$ENV{'SCRIPT_NAME'}' enctype="multipart/form-data">\n
 246                 <table width='100%' border="0">
 247                 <tr>
 248 END
 249 ;
 250         #check which parameters have to be enabled (from settings file)
 251         $checked{'ENABLE_GREEN'}{'off'} = '';
 252         $checked{'ENABLE_GREEN'}{'on'} = '';
 253         $checked{'ENABLE_GREEN'}{$settings{'ENABLE_GREEN'}} = "checked='checked'";
 254
 255         $checked{'ENABLE_BLUE'}{'off'} = '';
 256         $checked{'ENABLE_BLUE'}{'on'} = '';
 257         $checked{'ENABLE_BLUE'}{$settings{'ENABLE_BLUE'}} = "checked='checked'";
 258
 259         $checked{'UNLIMITED'}{'off'} = '';
 260         $checked{'UNLIMITED'}{'on'} = '';
 261         $checked{'UNLIMITED'}{$settings{'UNLIMITED'}} = "checked='checked'";
 262
 263         if ($netsettings{'GREEN_DEV'}){
 264                 print "<td width='30%'>$Lang::tr{'Captive active on'} <font color='$Header::colourgreen'>Green</font></td><td><input type='checkbox' name='ENABLE_GREEN' $checked{'ENABLE_GREEN'}{'on'} /></td></tr>";
 265         }
 266         if ($netsettings{'BLUE_DEV'}){
 267                 print "<td width='30%'>$Lang::tr{'Captive active on'} <font color='$Header::colourblue'>Blue</font></td><td><input type='checkbox' name='ENABLE_BLUE' $checked{'ENABLE_BLUE'}{'on'} /></td></tr>";
 268         }
 269
 270         print<<END
 271                 </tr>
 272                 <tr>
 273                 <td><br>
 274                         $Lang::tr{'Captive title'}
 275                 </td>
 276                 <td><br>
 277                         <input type='text' name='TITLE' value="$settings{'TITLE'}" size='40'>
 278                 </td>
 279                 </tr>
 280 END
 281 ;
 282
 283 print<<END
 284                 <tr>
 285                         <td>
 286                                 $Lang::tr{'Captive authentication'}
 287                         </td>
 288                         <td>
 289                                 <select name='AUTH' style='width:8em;'>
 290 END
 291 ;
 292         print "<option value='LICENSE' ";
 293         print " selected='selected'" if ($settings{'AUTH'} eq 'LICENSE');
 294         print ">$Lang::tr{'Captive auth_lic'}</option>";
 295
 296         print "<option value='VOUCHER' ";
 297         print " selected='selected'" if ($settings{'AUTH'} eq 'VOUCHER');
 298         print ">$Lang::tr{'Captive auth_vou'}</option>";
 299
 300         print<<END
 301                                 </select>
 302                         </td>
 303                 </tr>
 304 END
 305 ;
 306
 307         &agbbox();
 308
 309         #Logo Upload
 310         print "<tr><td>$Lang::tr{'Captive logo_upload'}</td><td><INPUT TYPE='file' NAME='uploaded_file' SIZE=30 MAXLENGTH=80></td></tr><tr>";
 311         #Show Logo in webinterface with 1/2 size if set
 312         if (-f "$logopath/logo.png"){
 313                 print"<td>$Lang::tr{'Captive logo_set'}</td>";
 314                 print"<td><img src='/captive/logo/logo.png' alt='$logopath/logo.png' width='25%' height='25%' /></td></tr>";
 315         }else{
 316                 print"<td>$Lang::tr{'Captive logo_set'}</td>";
 317                 print"<td><br>$Lang::tr{'no'}</td></tr>";
 318         }
 319         print"<tr><td>$Lang::tr{'Captive vouchervalid'}</td><td>";
 320         print "<br><table border='0' with=100%>";
 321         print "<th>$Lang::tr{'hours'}</th><th>$Lang::tr{'days'}</th><th>$Lang::tr{'weeks'}</th><th>$Lang::tr{'months'}</th>";
 322
 323         #print hour-dropdownbox
 324         my $hrs=3600;
 325         print "<tr><td><select name='EXP_HOUR' style='width:8em;'>";
 326         print "<option value='0' ";
 327         print " selected='selected'" if ($settings{'EXP_HOUR'} eq '0');
 328         print ">--</option>";
 329         for (my $i = 1; $i<25; $i++){
 330                 my $exp_sec = $i * $hrs;
 331                 print "<option value='$exp_sec' ";
 332                 print " selected='selected'" if ($settings{'EXP_HOUR'} eq $exp_sec);
 333                 print ">$i</option>";
 334         }
 335         print "</td><td>";
 336
 337         #print day-dropdownbox
 338         my $days=3600*24;
 339         print "<select name='EXP_DAY' style='width:8em;'>";
 340         print "<option value='0' ";
 341         print " selected='selected'" if ($settings{'EXP_DAY'} eq '0');
 342         print ">--</option>";
 343         for (my $i = 1; $i<8; $i++){
 344                 my $exp_sec = $i * $days;
 345                 print "<option value='$exp_sec' ";
 346                 print " selected='selected'" if ($settings{'EXP_DAY'} eq $exp_sec);
 347                 print ">$i</option>";
 348         }
 349         print "</td><td>";
 350
 351         #print week-dropdownbox
 352         my $week=3600*24*7;
 353         print "<select name='EXP_WEEK' style='width:8em;'>";
 354         print "<option value='0' ";
 355         print " selected='selected'" if ($settings{'EXP_WEEK'} eq '0');
 356         print ">--</option>";
 357         for (my $i = 1; $i<5; $i++){
 358                 my $exp_sec = $i * $week;
 359                 print "<option value='$exp_sec' ";
 360                 print " selected='selected'" if ($settings{'EXP_WEEK'} eq $exp_sec);
 361                 print ">$i</option>";
 362         }
 363         print "</td><td>";
 364
 365         #print month-dropdownbox
 366         my $month=3600*24*30;
 367         print "<select name='EXP_MONTH' style='width:8em;'>";
 368         print "<option value='0' ";
 369         print " selected='selected'" if ($settings{'EXP_MONTH'} eq '0');
 370         print ">--</option>";
 371         for (my $i = 1; $i<13; $i++){
 372                 my $exp_sec = $i * $month;
 373                 print "<option value='$exp_sec' ";
 374                 print " selected='selected'" if ($settings{'EXP_MONTH'} eq $exp_sec);
 375                 print ">$i</option>";
 376         }
 377         print "</td>";
 378
 379         print "<td>&nbsp;&nbsp;&nbsp;<input type='checkbox' name='UNLIMITED' $checked{'UNLIMITED'}{'on'} /></td><td>&nbsp;<b>$Lang::tr{'Captive nolimit'}</b></td>";
 380
 381         print "</tr></table>";
 382
 383 print<<END
 384                 <tr>
 385                         <td>
 386                         </td>
 387                         <td align='right'>
 388                         <input type='submit' name='ACTION' value="$Lang::tr{'save'}"/>
 389                         </td>
 390                 </tr>
 391                 </table>
 392                 <br><br>
 393 END
 394 ;
 395         print "</form>";
 396
 397         &Header::closebox();
 398
 399         #if settings is set to use vouchers, the voucher part has to be displayed
 400         if ($settings{'AUTH'} eq 'VOUCHER'){
 401                 &voucher();
 402         }else{
 403                 #otherwise we show the licensepart
 404                 &show_license_connections();
 405         }
 406 }
 407
 408 sub agbbox(){
 409         &getagb();
 410 print<<END
 411         <tr>
 412                 <td>
 413                         License agreement
 414                 </td>
 415                 <td>
 416                         <br>
 417                         <textarea cols="50" rows="10" name="AGB">$cgiparams{'AGB'}</textarea>
 418                 </td>
 419         </tr>
 420 END
 421 ;
 422 }
 423
 424 sub gencode(){
 425         #generate a random code only letters from A-Z except 'O'  and 0-9
 426         my @chars = ("A".."N", "P".."Z", "0".."9");
 427         my $randomstring;
 428         $randomstring .= $chars[rand @chars] for 1..8;
 429         return $randomstring;
 430 }
 431
 432 sub voucher(){
 433         #show voucher part
 434         #calculate expiredate
 435         my $expire;
 436         if ($settings{'UNLIMITED'} eq 'on'){
 437                 $expire = $Lang::tr{'Captive nolimit'};
 438         }else{
 439                 $expire = sub{sprintf '%02d.%02d.%04d %02d:%02d', $_[3], $_[4]+1, $_[5]+1900, $_[2], $_[1]  }->(localtime(time()+$settings{'EXPIRE'}));
 440     }
 441
 442         &Header::openbox('100%', 'left', $Lang::tr{'Captive voucher'});
 443 print<<END
 444         <form method='post' action='$ENV{'SCRIPT_NAME'}'>
 445         <table class='tbl' width='100%'>
 446         <tr>
 447                 <th align='center' width='20%'>$Lang::tr{'Captive voucher'}</th><th align='center' width='15%'>$Lang::tr{'Captive expire'}</th><th align='center' width='65%'>$Lang::tr{'remark'}</th></tr>
 448 END
 449 ;
 450
 451         $cgiparams{'CODE'} = &gencode();
 452         print "<tr><td><center><b><font size='5'>$cgiparams{'CODE'}</font></b></center></td><td><center><font size='2'>$expire</font></center></td><td><input type='text' style='width: 96%;' name='REMARK'  align='left'></td></tr>";
 453         print "</table><br>";
 454         print "<center><input type='submit' name='ACTION' value='$Lang::tr{'Captive voucherout'}'><input type='hidden' name='CODE' value='$cgiparams{'CODE'}'</center></form>";
 455         &Header::closebox();
 456         if (! -z $voucherout) { &show_voucher_out();}
 457         if (! -z $clients) { &show_voucher_in_use();}
 458 }
 459
 460 sub show_license_connections(){
 461         #if there are active clients, show the box with active connections
 462         return if ( -z $clients || ! -f $clients );
 463         my $count=0;
 464         my $col;
 465         &Header::openbox('100%', 'left', $Lang::tr{'Captive voactive'});
 466 print<<END
 467                 <center><table class='tbl'>
 468                 <tr>
 469                         <th align='center' width='15%'>$Lang::tr{'Captive voucher'}</th><th th align='center' width='15%'>$Lang::tr{'Captive activated'}</th><th th align='center' width='15%'>$Lang::tr{'Captive expire'}</th><th align='center' width='50%'><font size='1'>$Lang::tr{'Captive mac'}</th><th th align='center' width='5%'>$Lang::tr{'delete'}</th></tr>
 470 END
 471 ;
 472         #read all clients from hash and show table
 473         &General::readhasharray("$clients", \%clientshash);
 474         foreach my $key (keys %clientshash){
 475                 my $starttime = sub{sprintf '%02d.%02d.%04d %02d:%02d', $_[3], $_[4]+1, $_[5]+1900, $_[2], $_[1]  }->(localtime($clientshash{$key}[2]));
 476                 my $endtime;
 477                 if ($clientshash{$key}[3] eq '0'){
 478                         $endtime=$Lang::tr{'Captive nolimit'};
 479                 }else{
 480                         $endtime=sub{sprintf '%02d.%02d.%04d %02d:%02d', $_[3], $_[4]+1, $_[5]+1900, $_[2], $_[1]  }->(localtime($clientshash{$key}[2]+$clientshash{$key}[3]));
 481                 }
 482
 483                 if ($count % 2){
 484                         print" <tr>";
 485                         $col="bgcolor='$color{'color20'}'";
 486                 }else{
 487                         $col="bgcolor='$color{'color22'}'";
 488                         print" <tr>";
 489                 }
 490                 print "<td $col><center>$clientshash{$key}[4]</td><td $col><center>$starttime ";
 491                 print "</center></td><td $col><center>$endtime ";
 492                 print "</td><td $col><center>$clientshash{$key}[0]</td><td $col><form method='post'><center><input type='image' src='/images/delete.gif' align='middle' alt='$Lang::tr{'delete'}' title='$Lang::tr{'delete'}' /><form method='post'><input type='hidden' name='ACTION' value='delvoucherinuse' /><input type='hidden' name='key' value='$clientshash{$key}[0]' /></form></tr>";
 493                 $count++;
 494         }
 495
 496         print "</table>";
 497         &Header::closebox();
 498 }
 499
 500 sub show_voucher_out(){
 501         #if there are already generated but unsused vouchers, print a table
 502         return if ( -z $voucherout);
 503         my $count=0;
 504         my $col;
 505         &Header::openbox('100%', 'left', $Lang::tr{'Captive vout'});
 506         print<<END
 507                 <center><table class='tbl' border='0'>
 508                 <tr>
 509                         <th align='center' width='15%'>$Lang::tr{'Captive voucher'}</th><th align='center' width='15%'>$Lang::tr{'date'}</th><th th align='center' width='15%'>$Lang::tr{'Captive expire'}</th><th align='center' width='60%'>$Lang::tr{'remark'}</th><th align='center' width='5%'>$Lang::tr{'delete'}</th></tr>
 510 END
 511 ;
 512         &General::readhasharray("$voucherout", \%voucherhash);
 513         foreach my $key (keys %voucherhash)
 514         {
 515                 my $starttime = sub{sprintf '%02d.%02d.%04d %02d:%02d', $_[3], $_[4]+1, $_[5]+1900, $_[2], $_[1]  }->(localtime($voucherhash{$key}[0]));
 516                 my $endtime;
 517                 if ($voucherhash{$key}[2] eq '0'){
 518                         $endtime=$Lang::tr{'Captive nolimit'};
 519                 }else{
 520                         $endtime=sub{sprintf '%02d.%02d.%04d %02d:%02d', $_[3], $_[4]+1, $_[5]+1900, $_[2], $_[1]  }->(localtime(time()+$voucherhash{$key}[2]));
 521                 }
 522
 523                 if ($count % 2){
 524                         print" <tr>";
 525                         $col="bgcolor='$color{'color20'}'";
 526                 }else{
 527                         $col="bgcolor='$color{'color22'}'";
 528                         print" <tr>";
 529                 }
 530
 531                 print "<td $col><center><b>$voucherhash{$key}[1]</b></td>";
 532                 print "<td $col><center>$starttime</td>";
 533                 print "<td $col><center>$endtime</td>";
 534                 print "<td $col align='center'>$voucherhash{$key}[3]</td>";
 535                 print "<td $col><form method='post'><center><input type='image' src='/images/delete.gif' align='middle' alt='$Lang::tr{'delete'}' title='$Lang::tr{'delete'}' /><form method='post'><input type='hidden' name='ACTION' value='delvoucherout' /><input type='hidden' name='key' value='$voucherhash{$key}[0]' /></form></tr>";
 536                 $count++;
 537         }
 538
 539         print "</table>";
 540         &Header::closebox();
 541 }
 542
 543 sub show_voucher_in_use(){
 544         #if there are active clients which use vouchers show table
 545         return if ( -z $clients || ! -f $clients );
 546         my $count=0;
 547         my $col;
 548         &Header::openbox('100%', 'left', $Lang::tr{'Captive voactive'});
 549 print<<END
 550         <center><table class='tbl' width='100%'>
 551                 <tr>
 552                         <th align='center' width='15%'>$Lang::tr{'Captive voucher'}</th><th th align='center' width='15%'>$Lang::tr{'Captive activated'}</th><th align='center' width='15%'>$Lang::tr{'Captive expire'}</th><th align='center' width='10%'>$Lang::tr{'Captive mac'}</th><th align='center' width='43%'>$Lang::tr{'remark'}</th><th th align='center' width='5%'>$Lang::tr{'delete'}</th></tr>
 553 END
 554 ;
 555         &General::readhasharray("$clients", \%clientshash);
 556         foreach my $key (keys %clientshash)
 557         {
 558                 #calculate time from clientshash (starttime)
 559                 my $starttime = sub{sprintf '%02d.%02d.%04d %02d:%02d', $_[3], $_[4]+1, $_[5]+1900, $_[2], $_[1]  }->(localtime($clientshash{$key}[2]));
 560                 #calculate endtime from clientshash
 561                 my $endtime;
 562                 if ($clientshash{$key}[3] eq '0'){
 563                         $endtime=$Lang::tr{'Captive nolimit'};
 564                 }else{
 565                         $endtime = sub{sprintf '%02d.%02d.%04d %02d:%02d', $_[3], $_[4]+1, $_[5]+1900, $_[2], $_[1]  }->(localtime($clientshash{$key}[2]+$clientshash{$key}[3]));
 566                 }
 567
 568                         if ($count % 2){
 569                                 print" <tr>";
 570                                 $col="bgcolor='$color{'color20'}'";
 571                         }else{
 572                                 $col="bgcolor='$color{'color22'}'";
 573                                 print" <tr>";
 574                         }
 575
 576                         print "<td $col><center><b>$clientshash{$key}[4]</b></td><td $col><center>$starttime ";
 577                         print "</center></td><td $col><center>$endtime</center></td><td $col><center>$clientshash{$key}[0]</td><td $col><center>$clientshash{$key}[5]</center>";
 578                         print "</td><td $col><form method='post'><center><input type='image' src='/images/delete.gif' align='middle' alt='$Lang::tr{'delete'}' title='$Lang::tr{'delete'}' /><form method='post'><input type='hidden' name='ACTION' value='delvoucherinuse' /><input type='hidden' name='key' value='$clientshash{$key}[0]' /></form></tr>";
 579                         $count++;
 580         }
 581
 582         print "</table>";
 583         &Header::closebox();
 584 }
 585
 586 sub validremark
 587 {
 588         # Checks a hostname against RFC1035
 589         my $remark = $_[0];
 590         # Each part should be at least two characters in length
 591         # but no more than 63 characters
 592         if (length ($remark) < 1 || length ($remark) > 255) {
 593                 return 0;}
 594         # Only valid characters are a-z, A-Z, 0-9 and -
 595         if ($remark !~ /^[a-zäöüA-ZÖÄÜ0-9-.:;\|_()\/\s]*$/) {
 596                 return 0;}
 597         # First character can only be a letter or a digit
 598         if (substr ($remark, 0, 1) !~ /^[a-zäöüA-ZÖÄÜ0-9]*$/) {
 599                 return 0;}
 600         # Last character can only be a letter or a digit
 601         if (substr ($remark, -1, 1) !~ /^[a-zöäüA-ZÖÄÜ0-9.:;_)]*$/) {
 602                 return 0;}
 603         return 1;
 604 }
 605
 606 sub pngsize {
 607         my $Buffer = shift;
 608         my ($width,$height) = ( undef, undef );
 609
 610         if ($Buffer =~ /IHDR(.{8})/) {
 611                 my $PNG = $1;
 612                 ($width,$height) = unpack( "NN", $PNG );
 613         } else {
 614                 $width="invalid";
 615                 $height= "invalid";
 616         };
 617         return ($width,$height);
 618 }
 619
 620 sub error{
 621         #if an errormessage exits, show a box with errormessage
 622         if ($errormessage) {
 623                 &Header::openbox('100%', 'left', $Lang::tr{'error messages'});
 624                 print "<class name='base'>$errormessage\n";
 625                 print "&nbsp;</class>\n";
 626                 &Header::closebox();
 627         }
 628 }
 629
 630 &Header::closebigbox();
 631 &Header::closepage();