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         my $file = $cgiparams{'uploaded_file'};
  62         if ($file){
  63                 #Check if extension is png
  64                 chomp $file;
  65                 my ($name, $path, $ext) = fileparse($file, qr/\.[^.]*$/);
  66                 if ($ext ne ".png"){
  67                         $errormessage=$Lang::tr{'Captive wrong ext'};
  68                 }
  69         }
  70
  71         $settings{'ENABLE_GREEN'}               = $cgiparams{'ENABLE_GREEN'};
  72         $settings{'ENABLE_BLUE'}                = $cgiparams{'ENABLE_BLUE'};
  73         $settings{'AUTH'}                               = $cgiparams{'AUTH'};
  74         $settings{'TITLE'}                              = $cgiparams{'TITLE'};
  75         $settings{'UNLIMITED'}                  = $cgiparams{'UNLIMITED'};
  76
  77         if (!$errormessage){
  78                 #Check if we need to upload a new logo
  79                 if($file){
  80                         #Save File
  81                         my ($filehandle) = CGI::upload('uploaded_file');
  82                         open (UPLOADFILE, ">$logopath/logo.png");
  83                         binmode $filehandle;
  84                         while ( <$filehandle> ) {
  85                                 print UPLOADFILE;
  86                         }
  87                         close (UPLOADFILE);
  88
  89                         #Open file to check if dimensions are within rang
  90                         open (PNG , "<$logopath/logo.png");
  91                         local $/;
  92                         my $PNG1=<PNG>;
  93                         close(PNG);
  94                         my ($width,$height)=&pngsize($PNG1);
  95                         if($width > 1920 || $height > 800 || $width < 1280 || $height < 400){
  96                                 $errormessage.="$Lang::tr{'Captive invalid logosize'} <br>Filedimensions width: $width  height: $height ";
  97                                 unlink("$logopath/logo.png");
  98                         }
  99                 }
 100
 101                 &General::writehash("$settingsfile", \%settings);
 102
 103                 #write Licensetext if defined
 104                 if ($cgiparams{'AGB'}){
 105                         $cgiparams{'AGB'} = &Header::escape($cgiparams{'AGB'});
 106                         open( FH, ">:utf8", "/var/ipfire/captive/agb.txt" ) or die("$!");
 107                         print FH $cgiparams{'AGB'};
 108                         close( FH );
 109                         $cgiparams{'AGB'}="";
 110                 }
 111                 #execute binary to reload firewall rules
 112                 system("/usr/local/bin/captivectrl");
 113
 114                 if ($cgiparams{'ENABLE_BLUE'} eq 'on'){
 115                                 system("/usr/local/bin/wirelessctrl");
 116                 }
 117         }
 118 }
 119
 120 if ($cgiparams{'ACTION'} eq "$Lang::tr{'Captive genvoucher'}"){
 121         #generates a voucher and writes it to /var/ipfire/voucher_out
 122
 123         #calculate expiredate
 124         my $expire;
 125         if ($settings{'UNLIMITED'} eq 'on'){
 126                 $expire = $Lang::tr{'Captive nolimit'};
 127         }else{
 128                 $settings{'EXPIRE'} = $cgiparams{'EXP_HOUR'}+$cgiparams{'EXP_DAY'}+$cgiparams{'EXP_WEEK'}+$cgiparams{'EXP_MONTH'};
 129                 $expire = sub{sprintf '%02d.%02d.%04d %02d:%02d', $_[3], $_[4]+1, $_[5]+1900, $_[2], $_[1]  }->(localtime(time()+$settings{'EXPIRE'}));
 130     }
 131
 132         #Check Expiretime
 133         if($cgiparams{'EXP_HOUR'}+$cgiparams{'EXP_DAY'}+$cgiparams{'EXP_WEEK'}+$cgiparams{'EXP_MONTH'} == 0 && $cgiparams{'UNLIMITED'} == ''){
 134                 $errormessage=$Lang::tr{'Captive noexpiretime'};
 135         }
 136         #check if we already have a voucher with same code
 137         &General::readhasharray("$voucherout", \%voucherhash);
 138         foreach my $key (keys %voucherhash) {
 139                 if($voucherhash{$key}[1] eq $cgiparams{'CODE'}){
 140                         $errormessage=$Lang::tr{'Captive err doublevoucher'};
 141                         last;
 142                 }
 143         }
 144
 145         #check valid remark
 146         if ($cgiparams{'REMARK'} ne '' && !&validremark($cgiparams{'REMARK'})){
 147                 $errormessage=$Lang::tr{'fwhost err remark'};
 148         }
 149
 150         #if no error detected, write to disk
 151         if (!$errormessage){
 152                 my $date=time(); #seconds in utc
 153
 154                 #first get new key from hash
 155                 my $key=&General::findhasharraykey (\%voucherhash);
 156                 #initialize all fields with ''
 157                 foreach my $i (0 .. 3) { $voucherhash{$key}[$i] = "";}
 158                 #define fields
 159                 $voucherhash{$key}[0] = $date;
 160                 $voucherhash{$key}[1] = $cgiparams{'CODE'};
 161                 $voucherhash{$key}[2] = $settings{'EXPIRE'};
 162                 $voucherhash{$key}[3] = $cgiparams{'REMARK'};
 163                 #write values to disk
 164                 &General::writehasharray("$voucherout", \%voucherhash);
 165
 166                 #now prepare log entry, get expiring date for voucher and decode remark for logfile
 167                 my $expdate=localtime(time()+$voucherhash{$key}[3]);
 168                 my $rem=HTML::Entities::decode_entities($voucherhash{$key}[4]);
 169
 170                 #write logfile entry
 171                 &General::log("Captive", "Generated new voucher $voucherhash{$key}[1] $voucherhash{$key}[2] hours valid expires on $expdate remark $rem");
 172         }
 173 }
 174
 175 if ($cgiparams{'ACTION'} eq 'delvoucherout'){
 176         #deletes an already generated but unused voucher
 177
 178         #read all generated vouchers
 179         &General::readhasharray("$voucherout", \%voucherhash);
 180         foreach my $key (keys %voucherhash) {
 181                 if($cgiparams{'key'} eq $voucherhash{$key}[0]){
 182                         #write logenty with decoded remark
 183                         my $rem=HTML::Entities::decode_entities($voucherhash{$key}[4]);
 184                         &General::log("Captive", "Delete unused voucher $voucherhash{$key}[1] $voucherhash{$key}[2] hours valid expires on $voucherhash{$key}[3] remark $rem");
 185                         #delete line from hash
 186                         delete $voucherhash{$key};
 187                         last;
 188                 }
 189         }
 190         #write back hash
 191         &General::writehasharray("$voucherout", \%voucherhash);
 192 }
 193
 194 if ($cgiparams{'ACTION'} eq 'delvoucherinuse'){
 195         #delete voucher and connection in use
 196
 197         #read all active clients
 198         &General::readhasharray("$clients", \%clientshash);
 199         foreach my $key (keys %clientshash) {
 200                 if($cgiparams{'key'} eq $clientshash{$key}[0]){
 201                         #prepare log entry with decoded remark
 202                         my $rem=HTML::Entities::decode_entities($clientshash{$key}[7]);
 203                         #write logentry
 204                         &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");
 205                         #delete line from hash
 206                         delete $clientshash{$key};
 207                         last;
 208                 }
 209         }
 210         #write back hash
 211         &General::writehasharray("$clients", \%clientshash);
 212         #reload firewallrules to kill connection of client
 213         system("/usr/local/bin/captivectrl");
 214 }
 215
 216 #open webpage, print header and open box
 217 &Header::openpage($Lang::tr{'Captive menu'}, 1, '');
 218 &Header::openbigbox();
 219
 220 #call error() to see if we have to print an errormessage on website
 221 &error();
 222
 223 #call config() to display the configuration box
 224 &config();
 225
 226 sub getagb(){
 227         #open textfile from /var/ipfire/captive/agb.txt
 228         open( my $handle, "<:utf8", "/var/ipfire/captive/agb.txt" ) or die("$!");
 229                 while(<$handle>){
 230                         #read line by line and print on screen
 231                         $cgiparams{'AGB'}.= HTML::Entities::decode_entities($_);
 232                 }
 233         close( $handle );
 234 }
 235
 236 sub config(){
 237         #prints the config box on the website
 238         &Header::openbox('100%', 'left', $Lang::tr{'Captive config'});
 239         print <<END
 240                 <form method='post' action='$ENV{'SCRIPT_NAME'}' enctype="multipart/form-data">\n
 241                 <table width='100%' border="0">
 242                 <tr>
 243 END
 244 ;
 245         #check which parameters have to be enabled (from settings file)
 246         $checked{'ENABLE_GREEN'}{'off'} = '';
 247         $checked{'ENABLE_GREEN'}{'on'} = '';
 248         $checked{'ENABLE_GREEN'}{$settings{'ENABLE_GREEN'}} = "checked='checked'";
 249
 250         $checked{'ENABLE_BLUE'}{'off'} = '';
 251         $checked{'ENABLE_BLUE'}{'on'} = '';
 252         $checked{'ENABLE_BLUE'}{$settings{'ENABLE_BLUE'}} = "checked='checked'";
 253
 254         $checked{'UNLIMITED'}{'off'} = '';
 255         $checked{'UNLIMITED'}{'on'} = '';
 256         $checked{'UNLIMITED'}{$settings{'UNLIMITED'}} = "checked='checked'";
 257
 258         if ($netsettings{'GREEN_DEV'}){
 259                 print "<td width='30%'>$Lang::tr{'Captive active on'} <font color='$Header::colourgreen'>Green</font></td><td><input type='checkbox' name='ENABLE_GREEN' $checked{'ENABLE_GREEN'}{'on'} /></td></tr>";
 260         }
 261         if ($netsettings{'BLUE_DEV'}){
 262                 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>";
 263         }
 264
 265         print<<END
 266                 </tr>
 267                 <tr>
 268                 <td><br>
 269                         $Lang::tr{'Captive title'}
 270                 </td>
 271                 <td><br>
 272                         <input type='text' name='TITLE' value="$settings{'TITLE'}" size='40'>
 273                 </td>
 274                 </tr>
 275 END
 276 ;
 277
 278 print<<END
 279                 <tr>
 280                         <td>
 281                                 $Lang::tr{'Captive authentication'}
 282                         </td>
 283                         <td>
 284                                 <select name='AUTH' style='width:8em;'>
 285 END
 286 ;
 287         print "<option value='LICENSE' ";
 288         print " selected='selected'" if ($settings{'AUTH'} eq 'LICENSE');
 289         print ">$Lang::tr{'Captive auth_lic'}</option>";
 290
 291         print "<option value='VOUCHER' ";
 292         print " selected='selected'" if ($settings{'AUTH'} eq 'VOUCHER');
 293         print ">$Lang::tr{'Captive auth_vou'}</option>";
 294
 295         print<<END
 296                                 </select>
 297                         </td>
 298                 </tr>
 299 END
 300 ;
 301
 302         &agbbox();
 303
 304         #Logo Upload
 305         print "<tr><td>$Lang::tr{'Captive logo_upload'}<br>$Lang::tr{'Captive logo_upload1'}</td><td><INPUT TYPE='file' NAME='uploaded_file' SIZE=30 MAXLENGTH=80></td></tr><tr>";
 306         #Show Logo in webinterface with 1/2 size if set
 307         if (-f "$logopath/logo.png"){
 308                 print"<td>$Lang::tr{'Captive logo_set'}</td>";
 309                 print"<td><img src='/captive/logo/logo.png' alt='$logopath/logo.png' width='25%' height='25%' /></td></tr>";
 310         }else{
 311                 print"<td>$Lang::tr{'Captive logo_set'}</td>";
 312                 print"<td><br>$Lang::tr{'no'}</td></tr>";
 313         }
 314 print<<END
 315                 <tr>
 316                         <td>
 317                         </td>
 318                         <td align='right'>
 319                         <input type='submit' name='ACTION' value="$Lang::tr{'save'}"/>
 320                         </td>
 321                 </tr>
 322                 </table>
 323                 <br><br>
 324 END
 325 ;
 326         print "</form>";
 327
 328         &Header::closebox();
 329
 330         #if settings is set to use vouchers, the voucher part has to be displayed
 331         if ($settings{'AUTH'} eq 'VOUCHER'){
 332                 &voucher();
 333         }else{
 334                 #otherwise we show the licensepart
 335                 &show_license_connections();
 336         }
 337 }
 338
 339 sub agbbox(){
 340         &getagb();
 341 print<<END
 342         <tr>
 343                 <td>
 344                         License agreement
 345                 </td>
 346                 <td>
 347                         <br>
 348                         <textarea cols="50" rows="10" name="AGB">$cgiparams{'AGB'}</textarea>
 349                 </td>
 350         </tr>
 351 END
 352 ;
 353 }
 354
 355 sub gencode(){
 356         #generate a random code only letters from A-Z except 'O'  and 0-9
 357         my @chars = ("A".."N", "P".."Z", "0".."9");
 358         my $randomstring;
 359         $randomstring .= $chars[rand @chars] for 1..8;
 360         return $randomstring;
 361 }
 362
 363 sub voucher(){
 364         #show voucher part
 365         &Header::openbox('100%', 'left', $Lang::tr{'Captive genvoucher'});
 366         print "<form method='post' action='$ENV{'SCRIPT_NAME'}'>";
 367         print "<table border='0' width='100%'>";
 368         print "<tr><td width='30%'><br>$Lang::tr{'Captive vouchervalid'}</td><td width='70%'><br>";
 369
 370                 print "<table class='tbl' border='0' width='100%'>";
 371                 print "<th>$Lang::tr{'hours'}</th><th>$Lang::tr{'days'}</th><th>$Lang::tr{'weeks'}</th><th>$Lang::tr{'months'}</th><th></th><th></th>";
 372
 373                 #print hour-dropdownbox
 374                 my $hrs=3600;
 375                 print "<tr height='40px'><td><select name='EXP_HOUR' style='width:8em;'>";
 376                 print "<option value='0' ";
 377                 print " selected='selected'" if ($settings{'EXP_HOUR'} eq '0');
 378                 print ">--</option>";
 379                 for (my $i = 1; $i<25; $i++){
 380                         my $exp_sec = $i * $hrs;
 381                         print "<option value='$exp_sec' ";
 382                         print " selected='selected'" if ($settings{'EXP_HOUR'} eq $exp_sec);
 383                         print ">$i</option>";
 384                 }
 385                 print "</td><td>";
 386
 387                 #print day-dropdownbox
 388                 my $days=3600*24;
 389                 print "<select name='EXP_DAY' style='width:8em;'>";
 390                 print "<option value='0' ";
 391                 print " selected='selected'" if ($settings{'EXP_DAY'} eq '0');
 392                 print ">--</option>";
 393                 for (my $i = 1; $i<8; $i++){
 394                         my $exp_sec = $i * $days;
 395                         print "<option value='$exp_sec' ";
 396                         print " selected='selected'" if ($settings{'EXP_DAY'} eq $exp_sec);
 397                         print ">$i</option>";
 398                 }
 399                 print "</td><td>";
 400
 401                 #print week-dropdownbox
 402                 my $week=3600*24*7;
 403                 print "<select name='EXP_WEEK' style='width:8em;'>";
 404                 print "<option value='0' ";
 405                 print " selected='selected'" if ($settings{'EXP_WEEK'} eq '0');
 406                 print ">--</option>";
 407                 for (my $i = 1; $i<5; $i++){
 408                         my $exp_sec = $i * $week;
 409                         print "<option value='$exp_sec' ";
 410                         print " selected='selected'" if ($settings{'EXP_WEEK'} eq $exp_sec);
 411                         print ">$i</option>";
 412                 }
 413                 print "</td><td>";
 414
 415                 #print month-dropdownbox
 416                 my $month=3600*24*30;
 417                 print "<select name='EXP_MONTH' style='width:8em;'>";
 418                 print "<option value='0' ";
 419                 print " selected='selected'" if ($settings{'EXP_MONTH'} eq '0');
 420                 print ">--</option>";
 421                 for (my $i = 1; $i<13; $i++){
 422                         my $exp_sec = $i * $month;
 423                         print "<option value='$exp_sec' ";
 424                         print " selected='selected'" if ($settings{'EXP_MONTH'} eq $exp_sec);
 425                         print ">$i</option>";
 426                 }
 427                 print "</td>";
 428                 print "<td>&nbsp;&nbsp;&nbsp;<input type='checkbox' name='UNLIMITED' $checked{'UNLIMITED'}{'on'} /></td><td>&nbsp;<b>$Lang::tr{'Captive nolimit'}</b></td>";
 429                 print "</tr></table>";
 430         print "</td></tr>";
 431         print "<tr><td><br>$Lang::tr{'remark'}</td><td><br><input type='text' style='width: 98%;' name='REMARK'  align='left'></td></tr>";
 432         print "<tr><td>&nbsp</td><td></td></tr></table><br><br>";
 433         $cgiparams{'CODE'} = &gencode();
 434         print "<div align='right'><input type='submit' name='ACTION' value='$Lang::tr{'Captive genvoucher'}'><input type='hidden' name='CODE' value='$cgiparams{'CODE'}'></form></div>";
 435
 436         &Header::closebox();
 437         if (! -z $voucherout) { &show_voucher_out();}
 438         if (! -z $clients) { &show_voucher_in_use();}
 439 }
 440
 441 sub show_license_connections(){
 442         #if there are active clients, show the box with active connections
 443         return if ( -z $clients || ! -f $clients );
 444         my $count=0;
 445         my $col;
 446         &Header::openbox('100%', 'left', $Lang::tr{'Captive voactive'});
 447 print<<END
 448                 <center><table class='tbl'>
 449                 <tr>
 450                         <th align='center' width='15%'>$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>
 451 END
 452 ;
 453         #read all clients from hash and show table
 454         &General::readhasharray("$clients", \%clientshash);
 455         foreach my $key (keys %clientshash){
 456                 my $starttime = sub{sprintf '%02d.%02d.%04d %02d:%02d', $_[3], $_[4]+1, $_[5]+1900, $_[2], $_[1]  }->(localtime($clientshash{$key}[2]));
 457                 my $endtime;
 458                 if ($clientshash{$key}[3] eq '0'){
 459                         $endtime=$Lang::tr{'Captive nolimit'};
 460                 }else{
 461                         $endtime=sub{sprintf '%02d.%02d.%04d %02d:%02d', $_[3], $_[4]+1, $_[5]+1900, $_[2], $_[1]  }->(localtime($clientshash{$key}[2]+$clientshash{$key}[3]));
 462                 }
 463
 464                 if ($count % 2){
 465                         print" <tr>";
 466                         $col="bgcolor='$color{'color20'}'";
 467                 }else{
 468                         $col="bgcolor='$color{'color22'}'";
 469                         print" <tr>";
 470                 }
 471                 print "<td $col><center>$clientshash{$key}[4]</td><td $col><center>$starttime ";
 472                 print "</center></td><td $col><center>$endtime ";
 473                 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>";
 474                 $count++;
 475         }
 476
 477         print "</table>";
 478         &Header::closebox();
 479 }
 480
 481 sub show_voucher_out(){
 482         #if there are already generated but unsused vouchers, print a table
 483         return if ( -z $voucherout);
 484         my $count=0;
 485         my $col;
 486         &Header::openbox('100%', 'left', $Lang::tr{'Captive vout'});
 487         print<<END
 488                 <center><table class='tbl' border='0'>
 489                 <tr>
 490                         <th align='center' width='15%'>$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>
 491 END
 492 ;
 493         &General::readhasharray("$voucherout", \%voucherhash);
 494         foreach my $key (keys %voucherhash)
 495         {
 496                 my $starttime = sub{sprintf '%02d.%02d.%04d %02d:%02d', $_[3], $_[4]+1, $_[5]+1900, $_[2], $_[1]  }->(localtime($voucherhash{$key}[0]));
 497                 my $endtime;
 498                 if ($voucherhash{$key}[2] eq '0'){
 499                         $endtime=$Lang::tr{'Captive nolimit'};
 500                 }else{
 501                         $endtime=sub{sprintf '%02d.%02d.%04d %02d:%02d', $_[3], $_[4]+1, $_[5]+1900, $_[2], $_[1]  }->(localtime(time()+$voucherhash{$key}[2]));
 502                 }
 503
 504                 if ($count % 2){
 505                         print" <tr>";
 506                         $col="bgcolor='$color{'color20'}'";
 507                 }else{
 508                         $col="bgcolor='$color{'color22'}'";
 509                         print" <tr>";
 510                 }
 511
 512                 print "<td $col><center><b>$voucherhash{$key}[1]</b></td>";
 513                 print "<td $col><center>$starttime</td>";
 514                 print "<td $col><center>$endtime</td>";
 515                 print "<td $col align='center'>$voucherhash{$key}[3]</td>";
 516                 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>";
 517                 $count++;
 518         }
 519
 520         print "</table>";
 521         &Header::closebox();
 522 }
 523
 524 sub show_voucher_in_use(){
 525         #if there are active clients which use vouchers show table
 526         return if ( -z $clients || ! -f $clients );
 527         my $count=0;
 528         my $col;
 529         &Header::openbox('100%', 'left', $Lang::tr{'Captive voactive'});
 530 print<<END
 531         <center><table class='tbl' width='100%'>
 532                 <tr>
 533                         <th align='center' width='15%'>$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%'>$Lang::tr{'delete'}</th></tr>
 534 END
 535 ;
 536         &General::readhasharray("$clients", \%clientshash);
 537         foreach my $key (keys %clientshash)
 538         {
 539                 #calculate time from clientshash (starttime)
 540                 my $starttime = sub{sprintf '%02d.%02d.%04d %02d:%02d', $_[3], $_[4]+1, $_[5]+1900, $_[2], $_[1]  }->(localtime($clientshash{$key}[2]));
 541                 #calculate endtime from clientshash
 542                 my $endtime;
 543                 if ($clientshash{$key}[3] eq '0'){
 544                         $endtime=$Lang::tr{'Captive nolimit'};
 545                 }else{
 546                         $endtime = sub{sprintf '%02d.%02d.%04d %02d:%02d', $_[3], $_[4]+1, $_[5]+1900, $_[2], $_[1]  }->(localtime($clientshash{$key}[2]+$clientshash{$key}[3]));
 547                 }
 548
 549                         if ($count % 2){
 550                                 print" <tr>";
 551                                 $col="bgcolor='$color{'color20'}'";
 552                         }else{
 553                                 $col="bgcolor='$color{'color22'}'";
 554                                 print" <tr>";
 555                         }
 556
 557                         print "<td $col><center><b>$clientshash{$key}[4]</b></td><td $col><center>$starttime ";
 558                         print "</center></td><td $col><center>$endtime</center></td><td $col><center>$clientshash{$key}[0]</td><td $col><center>$clientshash{$key}[5]</center>";
 559                         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>";
 560                         $count++;
 561         }
 562
 563         print "</table>";
 564         &Header::closebox();
 565 }
 566
 567 sub validremark
 568 {
 569         # Checks a hostname against RFC1035
 570         my $remark = $_[0];
 571         # Each part should be at least two characters in length
 572         # but no more than 63 characters
 573         if (length ($remark) < 1 || length ($remark) > 255) {
 574                 return 0;}
 575         # Only valid characters are a-z, A-Z, 0-9 and -
 576         if ($remark !~ /^[a-zäöüA-ZÖÄÜ0-9-.:;\|_()\/\s]*$/) {
 577                 return 0;}
 578         # First character can only be a letter or a digit
 579         if (substr ($remark, 0, 1) !~ /^[a-zäöüA-ZÖÄÜ0-9]*$/) {
 580                 return 0;}
 581         # Last character can only be a letter or a digit
 582         if (substr ($remark, -1, 1) !~ /^[a-zöäüA-ZÖÄÜ0-9.:;_)]*$/) {
 583                 return 0;}
 584         return 1;
 585 }
 586
 587 sub pngsize {
 588         my $Buffer = shift;
 589         my ($width,$height) = ( undef, undef );
 590
 591         if ($Buffer =~ /IHDR(.{8})/) {
 592                 my $PNG = $1;
 593                 ($width,$height) = unpack( "NN", $PNG );
 594         } else {
 595                 $width="invalid";
 596                 $height= "invalid";
 597         };
 598         return ($width,$height);
 599 }
 600
 601 sub error{
 602         #if an errormessage exits, show a box with errormessage
 603         if ($errormessage) {
 604                 &Header::openbox('100%', 'left', $Lang::tr{'error messages'});
 605                 print "<class name='base'>$errormessage\n";
 606                 print "&nbsp;</class>\n";
 607                 &Header::closebox();
 608         }
 609 }
 610
 611 &Header::closebigbox();
 612 &Header::closepage();