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 $coupons = "${General::swroot}/captive/coupons";
  35 my %couponhash = ();
  36
  37 my %settings=();
  38 my %mainsettings;
  39 my %color;
  40 my %cgiparams=();
  41 my %netsettings=();
  42 my %checked=();
  43 my $errormessage='';
  44 my $clients="${General::swroot}/captive/clients";
  45 my %clientshash=();
  46 my $settingsfile="${General::swroot}/captive/settings";
  47 my $logopath = "/srv/web/ipfire/html/captive/logo";
  48 unless (-e $settingsfile)       { system("touch $settingsfile"); }
  49
  50 &Header::getcgihash(\%cgiparams);
  51
  52 &General::readhash("${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         $settings{'COLOR'}                      = $cgiparams{'COLOR'};
  77
  78         if (!$errormessage){
  79                 #Check if we need to upload a new logo
  80                 if($file){
  81                         #Save File
  82                         my ($filehandle) = CGI::upload('uploaded_file');
  83                         open (UPLOADFILE, ">$logopath/logo.png");
  84                         binmode $filehandle;
  85                         while ( <$filehandle> ) {
  86                                 print UPLOADFILE;
  87                         }
  88                         close (UPLOADFILE);
  89
  90                         #Open file to check if dimensions are within rang
  91                         open (PNG , "<$logopath/logo.png");
  92                         local $/;
  93                         my $PNG1=<PNG>;
  94                         close(PNG);
  95                         my ($width,$height)=&pngsize($PNG1);
  96                         if($width > 1920 || $height > 800 || $width < 1280 || $height < 400){
  97                                 $errormessage.="$Lang::tr{'Captive invalid logosize'} <br>Filedimensions width: $width  height: $height ";
  98                                 unlink("$logopath/logo.png");
  99                         }
 100                 }
 101
 102                 &General::writehash("$settingsfile", \%settings);
 103
 104                 # Save terms
 105                 if ($cgiparams{'TERMS'}){
 106                         $cgiparams{'TERMS'} = &Header::escape($cgiparams{'TERMS'});
 107                         open(FH, ">:utf8", "/var/ipfire/captive/terms.txt") or die("$!");
 108                         print FH $cgiparams{'TERMS'};
 109                         close(FH);
 110                         $cgiparams{'TERMS'} = "";
 111                 }
 112
 113                 #execute binary to reload firewall rules
 114                 system("/usr/local/bin/captivectrl");
 115
 116                 if ($cgiparams{'ENABLE_BLUE'} eq 'on'){
 117                                 system("/usr/local/bin/wirelessctrl");
 118                 }
 119         }
 120 }
 121
 122 if ($cgiparams{'ACTION'} eq "$Lang::tr{'Captive generate coupon'}"){
 123         # Generates a new coupon
 124
 125         #calculate expiredate
 126         my $expire;
 127         if ($settings{'UNLIMITED'} eq 'on'){
 128                 $expire = $Lang::tr{'Captive nolimit'};
 129         }else{
 130                 $settings{'EXPIRE'} = $cgiparams{'EXP_HOUR'}+$cgiparams{'EXP_DAY'}+$cgiparams{'EXP_WEEK'}+$cgiparams{'EXP_MONTH'};
 131                 $expire = sub{sprintf '%02d.%02d.%04d %02d:%02d', $_[3], $_[4]+1, $_[5]+1900, $_[2], $_[1]  }->(localtime(time()+$settings{'EXPIRE'}));
 132     }
 133
 134         #Check Expiretime
 135         if($cgiparams{'EXP_HOUR'}+$cgiparams{'EXP_DAY'}+$cgiparams{'EXP_WEEK'}+$cgiparams{'EXP_MONTH'} == 0 && $cgiparams{'UNLIMITED'} == ''){
 136                 $errormessage=$Lang::tr{'Captive noexpiretime'};
 137         }
 138         #check if we already have a coupon with same code
 139         &General::readhasharray($coupons, \%couponhash) if (-e $coupons);
 140         foreach my $key (keys %couponhash) {
 141                 if($couponhash{$key}[1] eq $cgiparams{'CODE'}){
 142                         $errormessage=$Lang::tr{'Captive err doublevoucher'};
 143                         last;
 144                 }
 145         }
 146
 147         #check valid remark
 148         if ($cgiparams{'REMARK'} ne '' && !&validremark($cgiparams{'REMARK'})){
 149                 $errormessage=$Lang::tr{'fwhost err remark'};
 150         }
 151
 152         #if no error detected, write to disk
 153         if (!$errormessage){
 154                 my $date=time(); #seconds in utc
 155
 156                 #first get new key from hash
 157                 my $key=&General::findhasharraykey (\%couponhash);
 158                 #initialize all fields with ''
 159                 foreach my $i (0 .. 3) { $couponhash{$key}[$i] = "";}
 160                 #define fields
 161                 $couponhash{$key}[0] = $date;
 162                 $couponhash{$key}[1] = $cgiparams{'CODE'};
 163                 $couponhash{$key}[2] = $settings{'EXPIRE'};
 164                 $couponhash{$key}[3] = $cgiparams{'REMARK'};
 165                 #write values to disk
 166                 &General::writehasharray($coupons, \%couponhash);
 167
 168                 #now prepare log entry, get expiring date for voucher and decode remark for logfile
 169                 my $expdate=localtime(time()+$couponhash{$key}[3]);
 170                 my $rem=HTML::Entities::decode_entities($couponhash{$key}[4]);
 171
 172                 #write logfile entry
 173                 &General::log("Captive", "Generated new coupon $couponhash{$key}[1] $couponhash{$key}[2] hours valid expires on $expdate remark $rem");
 174         }
 175 }
 176
 177 if ($cgiparams{'ACTION'} eq 'delete-coupon') {
 178         #deletes an already generated but unused voucher
 179
 180         #read all generated vouchers
 181         &General::readhasharray($coupons, \%couponhash) if (-e $coupons);
 182         foreach my $key (keys %couponhash) {
 183                 if($cgiparams{'key'} eq $couponhash{$key}[0]){
 184                         #write logenty with decoded remark
 185                         my $rem=HTML::Entities::decode_entities($couponhash{$key}[4]);
 186                         &General::log("Captive", "Delete unused coupon $couponhash{$key}[1] $couponhash{$key}[2] hours valid expires on $couponhash{$key}[3] remark $rem");
 187                         #delete line from hash
 188                         delete $couponhash{$key};
 189                         last;
 190                 }
 191         }
 192         #write back hash
 193         &General::writehasharray($coupons, \%couponhash);
 194 }
 195
 196 if ($cgiparams{'ACTION'} eq 'delete-client') {
 197         #delete voucher and connection in use
 198
 199         #read all active clients
 200         &General::readhasharray($clients, \%clientshash) if (-e $clients);
 201         foreach my $key (keys %clientshash) {
 202                 if($cgiparams{'key'} eq $clientshash{$key}[0]){
 203                         #prepare log entry with decoded remark
 204                         my $rem=HTML::Entities::decode_entities($clientshash{$key}[7]);
 205                         #write logentry
 206                         &General::log("Captive", "Deleted client in use $clientshash{$key}[1] $clientshash{$key}[2] hours valid expires on $clientshash{$key}[3] remark $rem - Connection will be terminated");
 207                         #delete line from hash
 208                         delete $clientshash{$key};
 209                         last;
 210                 }
 211         }
 212         #write back hash
 213         &General::writehasharray("$clients", \%clientshash);
 214         #reload firewallrules to kill connection of client
 215         system("/usr/local/bin/captivectrl");
 216 }
 217
 218 #open webpage, print header and open box
 219 &Header::openpage($Lang::tr{'Captive menu'}, 1, '');
 220 &Header::openbigbox();
 221
 222 #call error() to see if we have to print an errormessage on website
 223 &error();
 224
 225 #call config() to display the configuration box
 226 &config();
 227
 228 sub getterms(){
 229         my @ret;
 230
 231         open(FILE, "<:utf8", "/var/ipfire/captive/terms.txt");
 232         while(<FILE>) {
 233                 push(@ret, HTML::Entities::decode_entities($_));
 234         }
 235         close(FILE);
 236
 237         return join(/\n/, @ret);
 238 }
 239
 240 sub config(){
 241         #prints the config box on the website
 242         &Header::openbox('100%', 'left', $Lang::tr{'Captive config'});
 243         print <<END
 244                 <form method='post' action='$ENV{'SCRIPT_NAME'}' enctype="multipart/form-data">\n
 245                 <table width='100%' border="0">
 246                 <tr>
 247 END
 248 ;
 249         #check which parameters have to be enabled (from settings file)
 250         $checked{'ENABLE_GREEN'}{'off'} = '';
 251         $checked{'ENABLE_GREEN'}{'on'} = '';
 252         $checked{'ENABLE_GREEN'}{$settings{'ENABLE_GREEN'}} = "checked='checked'";
 253
 254         $checked{'ENABLE_BLUE'}{'off'} = '';
 255         $checked{'ENABLE_BLUE'}{'on'} = '';
 256         $checked{'ENABLE_BLUE'}{$settings{'ENABLE_BLUE'}} = "checked='checked'";
 257
 258         $checked{'UNLIMITED'}{'off'} = '';
 259         $checked{'UNLIMITED'}{'on'} = '';
 260         $checked{'UNLIMITED'}{$settings{'UNLIMITED'}} = "checked='checked'";
 261
 262         if ($netsettings{'GREEN_DEV'}){
 263                 print "<td width='30%'>$Lang::tr{'Captive active on'} <font color='$Header::colourgreen'>Green</font></td><td><input type='checkbox' name='ENABLE_GREEN' $checked{'ENABLE_GREEN'}{'on'} /></td></tr>";
 264         }
 265         if ($netsettings{'BLUE_DEV'}){
 266                 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>";
 267         }
 268
 269         print<<END
 270                 </tr>
 271                 <tr>
 272                 <td><br>
 273                         $Lang::tr{'Captive title'}
 274                 </td>
 275                 <td><br>
 276                         <input type='text' name='TITLE' value="$settings{'TITLE'}" size='40'>
 277                 </td>
 278                 </tr>
 279 END
 280 ;
 281
 282 print<<END
 283                 <tr>
 284                         <td><br>
 285                                 $Lang::tr{'Captive authentication'}
 286                         </td>
 287                         <td><br>
 288                                 <select name='AUTH'>
 289 END
 290 ;
 291         print "<option value='TERMS' ";
 292         print " selected='selected'" if ($settings{'AUTH'} eq 'TERMS');
 293         print ">$Lang::tr{'Captive terms'}</option>";
 294
 295         print "<option value='COUPON' ";
 296         print " selected='selected'" if ($settings{'AUTH'} eq 'COUPON');
 297         print ">$Lang::tr{'Captive coupon'}</option>";
 298
 299         print<<END
 300                                 </select>
 301                         </td>
 302                 </tr>
 303 END
 304 ;
 305         if ($settings{'AUTH'} eq 'TERMS') {
 306                 my $terms = &getterms();
 307                 print <<END;
 308                         <tr>
 309                                 <td></td>
 310                                 <td>
 311                                         <textarea cols="50" rows="10" name="TERMS">$terms</textarea>
 312                                 </td>
 313                         </tr>
 314 END
 315         }
 316
 317         #Logo Upload
 318         print "<tr><td><br>$Lang::tr{'Captive logo_upload'}<br>$Lang::tr{'Captive logo_upload1'}</td><td><br><INPUT TYPE='file' NAME='uploaded_file' SIZE=30 MAXLENGTH=80></td></tr><tr>";
 319         #Show Logo in webinterface with 1/2 size if set
 320         if (-f "$logopath/logo.png"){
 321                 print"<td>$Lang::tr{'Captive logo_set'}</td>";
 322                 print"<td><img src='/captive/logo/logo.png' alt='$logopath/logo.png' width='25%' height='25%' /></td></tr>";
 323         }else{
 324                 print"<td>$Lang::tr{'Captive logo_set'}</td>";
 325                 print"<td><br>$Lang::tr{'no'}</td></tr>";
 326         }
 327 print<<END
 328                 <tr>
 329                         <td>$Lang::tr{'Captive brand color'}</td>
 330                         <td>
 331                                 <input type="color" name="COLOR" value="$settings{'COLOR'}">
 332                         </td>
 333                 </tr>
 334
 335                 <tr>
 336                         <td>
 337                         </td>
 338                         <td align='right'>
 339                         <input type='submit' name='ACTION' value="$Lang::tr{'save'}"/>
 340                         </td>
 341                 </tr>
 342                 </table>
 343                 <br><br>
 344 END
 345 ;
 346         print "</form>";
 347
 348         &Header::closebox();
 349
 350         #if settings is set to use coupons, the coupon part has to be displayed
 351         if ($settings{'AUTH'} eq 'COUPON'){
 352                 &coupons();
 353         }else{
 354                 #otherwise we show the licensepart
 355                 &show_license_connections();
 356         }
 357 }
 358
 359 sub gencode(){
 360         #generate a random code only letters from A-Z except 'O'  and 0-9
 361         my @chars = ("A".."N", "P".."Z", "0".."9");
 362         my $randomstring;
 363         $randomstring .= $chars[rand @chars] for 1..8;
 364         return $randomstring;
 365 }
 366
 367 sub coupons() {
 368         &Header::openbox('100%', 'left', $Lang::tr{'Captive generate coupon'});
 369         print "<form method='post' action='$ENV{'SCRIPT_NAME'}'>";
 370         print "<table border='0' width='100%'>";
 371         print "<tr><td width='30%'><br>$Lang::tr{'Captive vouchervalid'}</td><td width='70%'><br>";
 372
 373                 print "<table class='tbl' border='0' width='100%'>";
 374                 print "<th>$Lang::tr{'hours'}</th><th>$Lang::tr{'days'}</th><th>$Lang::tr{'weeks'}</th><th>$Lang::tr{'months'}</th><th></th><th></th>";
 375
 376                 #print hour-dropdownbox
 377                 my $hrs=3600;
 378                 print "<tr height='40px'><td><select name='EXP_HOUR' style='width:8em;'>";
 379                 print "<option value='0' ";
 380                 print " selected='selected'" if ($settings{'EXP_HOUR'} eq '0');
 381                 print ">--</option>";
 382                 for (my $i = 1; $i<25; $i++){
 383                         my $exp_sec = $i * $hrs;
 384                         print "<option value='$exp_sec' ";
 385                         print " selected='selected'" if ($settings{'EXP_HOUR'} eq $exp_sec);
 386                         print ">$i</option>";
 387                 }
 388                 print "</td><td>";
 389
 390                 #print day-dropdownbox
 391                 my $days=3600*24;
 392                 print "<select name='EXP_DAY' style='width:8em;'>";
 393                 print "<option value='0' ";
 394                 print " selected='selected'" if ($settings{'EXP_DAY'} eq '0');
 395                 print ">--</option>";
 396                 for (my $i = 1; $i<8; $i++){
 397                         my $exp_sec = $i * $days;
 398                         print "<option value='$exp_sec' ";
 399                         print " selected='selected'" if ($settings{'EXP_DAY'} eq $exp_sec);
 400                         print ">$i</option>";
 401                 }
 402                 print "</td><td>";
 403
 404                 #print week-dropdownbox
 405                 my $week=3600*24*7;
 406                 print "<select name='EXP_WEEK' style='width:8em;'>";
 407                 print "<option value='0' ";
 408                 print " selected='selected'" if ($settings{'EXP_WEEK'} eq '0');
 409                 print ">--</option>";
 410                 for (my $i = 1; $i<5; $i++){
 411                         my $exp_sec = $i * $week;
 412                         print "<option value='$exp_sec' ";
 413                         print " selected='selected'" if ($settings{'EXP_WEEK'} eq $exp_sec);
 414                         print ">$i</option>";
 415                 }
 416                 print "</td><td>";
 417
 418                 #print month-dropdownbox
 419                 my $month=3600*24*30;
 420                 print "<select name='EXP_MONTH' style='width:8em;'>";
 421                 print "<option value='0' ";
 422                 print " selected='selected'" if ($settings{'EXP_MONTH'} eq '0');
 423                 print ">--</option>";
 424                 for (my $i = 1; $i<13; $i++){
 425                         my $exp_sec = $i * $month;
 426                         print "<option value='$exp_sec' ";
 427                         print " selected='selected'" if ($settings{'EXP_MONTH'} eq $exp_sec);
 428                         print ">$i</option>";
 429                 }
 430                 print "</td>";
 431                 print "<td>&nbsp;&nbsp;&nbsp;<input type='checkbox' name='UNLIMITED' $checked{'UNLIMITED'}{'on'} /></td><td>&nbsp;<b>$Lang::tr{'Captive nolimit'}</b></td>";
 432                 print "</tr></table>";
 433         print "</td></tr>";
 434         print "<tr><td><br>$Lang::tr{'remark'}</td><td><br><input type='text' style='width: 98%;' name='REMARK'  align='left'></td></tr>";
 435         print "<tr><td>&nbsp</td><td></td></tr></table><br><br>";
 436         $cgiparams{'CODE'} = &gencode();
 437         print "<div align='right'><input type='submit' name='ACTION' value='$Lang::tr{'Captive generate coupon'}'><input type='hidden' name='CODE' value='$cgiparams{'CODE'}'></form></div>";
 438
 439         &Header::closebox();
 440
 441         # Show all coupons if exist
 442         if (! -z $coupons) {
 443                 &show_coupons();
 444         }
 445
 446         if (! -z $clients) {
 447                 &show_clients();
 448         }
 449 }
 450
 451 sub show_license_connections(){
 452         #if there are active clients, show the box with active connections
 453         return if ( -z $clients || ! -f $clients );
 454         my $count=0;
 455         my $col;
 456         &Header::openbox('100%', 'left', $Lang::tr{'Captive voactive'});
 457 print<<END
 458                 <center><table class='tbl'>
 459                 <tr>
 460                         <th align='center' width='15%'>$Lang::tr{'Captive coupon'}</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>
 461 END
 462 ;
 463         #read all clients from hash and show table
 464         &General::readhasharray($clients, \%clientshash) if (-e $clients);
 465         foreach my $key (keys %clientshash){
 466                 my $starttime = sub{sprintf '%02d.%02d.%04d %02d:%02d', $_[3], $_[4]+1, $_[5]+1900, $_[2], $_[1]  }->(localtime($clientshash{$key}[2]));
 467                 my $endtime;
 468                 if ($clientshash{$key}[3] eq '0'){
 469                         $endtime=$Lang::tr{'Captive nolimit'};
 470                 }else{
 471                         $endtime=sub{sprintf '%02d.%02d.%04d %02d:%02d', $_[3], $_[4]+1, $_[5]+1900, $_[2], $_[1]  }->(localtime($clientshash{$key}[2]+$clientshash{$key}[3]));
 472                 }
 473
 474                 if ($count % 2){
 475                         print" <tr>";
 476                         $col="bgcolor='$color{'color20'}'";
 477                 }else{
 478                         $col="bgcolor='$color{'color22'}'";
 479                         print" <tr>";
 480                 }
 481                 print "<td $col><center>$clientshash{$key}[4]</td><td $col><center>$starttime ";
 482                 print "</center></td><td $col><center>$endtime ";
 483                 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='$Lang::tr{'delete'}' /><form method='post'><input type='hidden' name='ACTION' value='delete-client' /><input type='hidden' name='key' value='$clientshash{$key}[0]' /></form></tr>";
 484                 $count++;
 485         }
 486
 487         print "</table>";
 488         &Header::closebox();
 489 }
 490
 491 sub show_coupons() {
 492         #if there are already generated but unsused coupons, print a table
 493         my $count=0;
 494         my $col;
 495         &Header::openbox('100%', 'left', $Lang::tr{'Captive vout'});
 496         print<<END
 497                 <center><table class='tbl' border='0'>
 498                 <tr>
 499                         <th align='center' width='15%'>$Lang::tr{'Captive coupon'}</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>
 500 END
 501 ;
 502         &General::readhasharray($coupons, \%couponhash) if (-e $coupons);
 503         foreach my $key (keys %couponhash)
 504         {
 505                 my $starttime = sub{sprintf '%02d.%02d.%04d %02d:%02d', $_[3], $_[4]+1, $_[5]+1900, $_[2], $_[1]  }->(localtime($couponhash{$key}[0]));
 506                 my $endtime;
 507                 if ($couponhash{$key}[2] eq '0'){
 508                         $endtime=$Lang::tr{'Captive nolimit'};
 509                 }else{
 510                         $endtime=sub{sprintf '%02d.%02d.%04d %02d:%02d', $_[3], $_[4]+1, $_[5]+1900, $_[2], $_[1]  }->(localtime(time()+$couponhash{$key}[2]));
 511                 }
 512
 513                 if ($count % 2){
 514                         print" <tr>";
 515                         $col="bgcolor='$color{'color20'}'";
 516                 }else{
 517                         $col="bgcolor='$color{'color22'}'";
 518                         print" <tr>";
 519                 }
 520
 521                 print "<td $col><center><b>$couponhash{$key}[1]</b></td>";
 522                 print "<td $col><center>$starttime</td>";
 523                 print "<td $col><center>$endtime</td>";
 524                 print "<td $col align='center'>$couponhash{$key}[3]</td>";
 525                 print "<td $col><form method='post'><center><input type='image' src='/images/delete.gif' align='middle' alt='$Lang::tr{'delete'}' title='$Lang::tr{'delete'}' /><form method='post'><input type='hidden' name='ACTION' value='delete-coupon' /><input type='hidden' name='key' value='$couponhash{$key}[0]' /></form></tr>";
 526                 $count++;
 527         }
 528
 529         print "</table>";
 530         &Header::closebox();
 531 }
 532
 533 sub show_clients() {
 534         #if there are active clients which use coupons show table
 535         return if ( -z $clients || ! -f $clients );
 536         my $count=0;
 537         my $col;
 538         &Header::openbox('100%', 'left', $Lang::tr{'Captive voactive'});
 539 print<<END
 540         <center><table class='tbl' width='100%'>
 541                 <tr>
 542                         <th align='center' width='15%'>$Lang::tr{'Captive coupon'}</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%'>$Lang::tr{'delete'}</th></tr>
 543 END
 544 ;
 545         &General::readhasharray($clients, \%clientshash) if (-e $clients);
 546         foreach my $key (keys %clientshash)
 547         {
 548                 #calculate time from clientshash (starttime)
 549                 my $starttime = sub{sprintf '%02d.%02d.%04d %02d:%02d', $_[3], $_[4]+1, $_[5]+1900, $_[2], $_[1]  }->(localtime($clientshash{$key}[2]));
 550                 #calculate endtime from clientshash
 551                 my $endtime;
 552                 if ($clientshash{$key}[3] eq '0'){
 553                         $endtime=$Lang::tr{'Captive nolimit'};
 554                 }else{
 555                         $endtime = sub{sprintf '%02d.%02d.%04d %02d:%02d', $_[3], $_[4]+1, $_[5]+1900, $_[2], $_[1]  }->(localtime($clientshash{$key}[2]+$clientshash{$key}[3]));
 556                 }
 557
 558                         if ($count % 2){
 559                                 print" <tr>";
 560                                 $col="bgcolor='$color{'color20'}'";
 561                         }else{
 562                                 $col="bgcolor='$color{'color22'}'";
 563                                 print" <tr>";
 564                         }
 565
 566                         print "<td $col><center><b>$clientshash{$key}[4]</b></td><td $col><center>$starttime ";
 567                         print "</center></td><td $col><center>$endtime</center></td><td $col><center>$clientshash{$key}[0]</td><td $col><center>$clientshash{$key}[5]</center>";
 568                         print "</td><td $col><form method='post'><center><input type='image' src='/images/delete.gif' align='middle' alt='$Lang::tr{'delete'}' title='$Lang::tr{'delete'}' /><form method='post'><input type='hidden' name='ACTION' value='delete-client' /><input type='hidden' name='key' value='$clientshash{$key}[0]' /></form></tr>";
 569                         $count++;
 570         }
 571
 572         print "</table>";
 573         &Header::closebox();
 574 }
 575
 576 sub validremark
 577 {
 578         # Checks a hostname against RFC1035
 579         my $remark = $_[0];
 580         # Each part should be at least two characters in length
 581         # but no more than 63 characters
 582         if (length ($remark) < 1 || length ($remark) > 255) {
 583                 return 0;}
 584         # Only valid characters are a-z, A-Z, 0-9 and -
 585         if ($remark !~ /^[a-zäöüA-ZÖÄÜ0-9-.:;\|_()\/\s]*$/) {
 586                 return 0;}
 587         # First character can only be a letter or a digit
 588         if (substr ($remark, 0, 1) !~ /^[a-zäöüA-ZÖÄÜ0-9]*$/) {
 589                 return 0;}
 590         # Last character can only be a letter or a digit
 591         if (substr ($remark, -1, 1) !~ /^[a-zöäüA-ZÖÄÜ0-9.:;_)]*$/) {
 592                 return 0;}
 593         return 1;
 594 }
 595
 596 sub pngsize {
 597         my $Buffer = shift;
 598         my ($width,$height) = ( undef, undef );
 599
 600         if ($Buffer =~ /IHDR(.{8})/) {
 601                 my $PNG = $1;
 602                 ($width,$height) = unpack( "NN", $PNG );
 603         } else {
 604                 $width="invalid";
 605                 $height= "invalid";
 606         };
 607         return ($width,$height);
 608 }
 609
 610 sub error{
 611         #if an errormessage exits, show a box with errormessage
 612         if ($errormessage) {
 613                 &Header::openbox('100%', 'left', $Lang::tr{'error messages'});
 614                 print "<class name='base'>$errormessage\n";
 615                 print "&nbsp;</class>\n";
 616                 &Header::closebox();
 617         }
 618 }
 619
 620 &Header::closebigbox();
 621 &Header::closepage();