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