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 %selected = ();
  35
  36 my $coupons = "${General::swroot}/captive/coupons";
  37 my %couponhash = ();
  38
  39 my $logo = "${General::swroot}/captive/logo.dat";
  40
  41 my %settings=();
  42 my %mainsettings;
  43 my %color;
  44 my %cgiparams=();
  45 my %netsettings=();
  46 my %checked=();
  47 my $errormessage='';
  48 my $clients="${General::swroot}/captive/clients";
  49 my %clientshash=();
  50 my $settingsfile="${General::swroot}/captive/settings";
  51 unless (-e $settingsfile)       { system("touch $settingsfile"); }
  52
  53 &Header::getcgihash(\%cgiparams);
  54
  55 &General::readhash("${General::swroot}/main/settings", \%mainsettings);
  56 &General::readhash("/srv/web/ipfire/html/themes/".$mainsettings{'THEME'}."/include/colors.txt", \%color);
  57 &General::readhash("$settingsfile", \%settings) if(-f $settingsfile);
  58 &General::readhash("${General::swroot}/ethernet/settings", \%netsettings);
  59
  60 &Header::showhttpheaders();
  61
  62 if ($cgiparams{'ACTION'} eq $Lang::tr{'save'}) {
  63         my $file = $cgiparams{'logo'};
  64         if ($file) {
  65                 # Check if the file extension is PNG/JPEG
  66                 chomp $file;
  67
  68                 my ($name, $path, $ext) = fileparse($file, qr/\.[^.]*$/);
  69                 if ($ext ne ".png" && $ext ne ".jpg" && $ext ne ".jpeg") {
  70                         $errormessage = $Lang::tr{'Captive wrong ext'};
  71                 }
  72         }
  73
  74         $settings{'ENABLE_GREEN'}               = $cgiparams{'ENABLE_GREEN'};
  75         $settings{'ENABLE_BLUE'}                = $cgiparams{'ENABLE_BLUE'};
  76         $settings{'AUTH'}                               = $cgiparams{'AUTH'};
  77         $settings{'TITLE'}                              = $cgiparams{'TITLE'};
  78         $settings{'COLOR'}                      = $cgiparams{'COLOR'};
  79         $settings{'SESSION_TIME'}               = $cgiparams{'SESSION_TIME'};
  80
  81         if (!$errormessage){
  82                 #Check if we need to upload a new logo
  83                 if ($file) {
  84                         # Save logo
  85                         my ($filehandle) = CGI::upload("logo");
  86
  87                         # XXX check filesize
  88
  89                         open(FILE, ">$logo");
  90                         binmode $filehandle;
  91                         while (<$filehandle>) {
  92                                 print FILE;
  93                         }
  94                         close(FILE);
  95                 }
  96
  97                 &General::writehash("$settingsfile", \%settings);
  98
  99                 # Save terms
 100                 if ($cgiparams{'TERMS'}){
 101                         $cgiparams{'TERMS'} = &Header::escape($cgiparams{'TERMS'});
 102                         open(FH, ">:utf8", "/var/ipfire/captive/terms.txt") or die("$!");
 103                         print FH $cgiparams{'TERMS'};
 104                         close(FH);
 105                         $cgiparams{'TERMS'} = "";
 106                 }
 107
 108                 #execute binary to reload firewall rules
 109                 system("/usr/local/bin/captivectrl");
 110
 111                 if ($cgiparams{'ENABLE_BLUE'} eq 'on'){
 112                                 system("/usr/local/bin/wirelessctrl");
 113                 }
 114         }
 115 }
 116
 117 if ($cgiparams{'ACTION'} eq "$Lang::tr{'Captive generate coupon'}") {
 118         # Check expiry time
 119         if ($cgiparams{'EXP_HOUR'} + $cgiparams{'EXP_DAY'} + $cgiparams{'EXP_WEEK'} + $cgiparams{'EXP_MONTH'} == 0 && $cgiparams{'UNLIMITED'} == '') {
 120                 $errormessage = $Lang::tr{'Captive noexpiretime'};
 121         }
 122
 123         #check valid remark
 124         if ($cgiparams{'REMARK'} ne '' && !&validremark($cgiparams{'REMARK'})){
 125                 $errormessage=$Lang::tr{'fwhost err remark'};
 126         }
 127
 128         if (!$errormessage) {
 129                 # Remember selected values
 130                 foreach my $val (("UNLIMITED", "EXP_HOUR", "EXP_DAY", "EXP_WEEK", "EXP_MONTH")) {
 131                         $settings{$val} = $cgiparams{$val};
 132                 }
 133                 &General::writehash($settingsfile, \%settings);
 134
 135                 &General::readhasharray($coupons, \%couponhash) if (-e $coupons);
 136                 my $now = time();
 137
 138                 # Calculate expiry time in seconds
 139                 my $expires = 0;
 140
 141                 if ($settings{'UNLIMITED'} ne 'on') {
 142                         $expires += $settings{'EXP_HOUR'};
 143                         $expires += $settings{'EXP_DAY'};
 144                         $expires += $settings{'EXP_WEEK'};
 145                         $expires += $settings{'EXP_MONTH'};
 146                 }
 147
 148                 my $count = $cgiparams{'COUNT'} || 1;
 149                 while($count-- > 0) {
 150                         # Generate a new code
 151                         my $code = &gencode();
 152
 153                         # Check if the coupon code already exists
 154                         foreach my $key (keys %couponhash) {
 155                                 if($couponhash{$key}[1] eq $code) {
 156                                         # Code already exists, so try again
 157                                         $code = "";
 158                                         $count++;
 159                                         last;
 160                                 }
 161                         }
 162
 163                         next if ($code eq "");
 164
 165                         # Get a new key from hash
 166                         my $key = &General::findhasharraykey(\%couponhash);
 167
 168                         # Initialize all fields
 169                         foreach my $i (0 .. 3) { $couponhash{$key}[$i] = ""; }
 170
 171                         $couponhash{$key}[0] = $now;
 172                         $couponhash{$key}[1] = $code;
 173                         $couponhash{$key}[2] = $expires;
 174                         $couponhash{$key}[3] = $cgiparams{'REMARK'};
 175                 }
 176
 177                 # Save everything to disk
 178                 &General::writehasharray($coupons, \%couponhash);
 179         }
 180 }
 181
 182 if ($cgiparams{'ACTION'} eq 'delete-coupon') {
 183         #deletes an already generated but unused voucher
 184
 185         #read all generated vouchers
 186         &General::readhasharray($coupons, \%couponhash) if (-e $coupons);
 187         foreach my $key (keys %couponhash) {
 188                 if($cgiparams{'key'} eq $couponhash{$key}[0]){
 189                         #write logenty with decoded remark
 190                         my $rem=HTML::Entities::decode_entities($couponhash{$key}[4]);
 191                         &General::log("Captive", "Delete unused coupon $couponhash{$key}[1] $couponhash{$key}[2] hours valid expires on $couponhash{$key}[3] remark $rem");
 192                         #delete line from hash
 193                         delete $couponhash{$key};
 194                         last;
 195                 }
 196         }
 197         #write back hash
 198         &General::writehasharray($coupons, \%couponhash);
 199 }
 200
 201 if ($cgiparams{'ACTION'} eq 'delete-client') {
 202         #delete voucher and connection in use
 203
 204         #read all active clients
 205         &General::readhasharray($clients, \%clientshash) if (-e $clients);
 206         foreach my $key (keys %clientshash) {
 207                 if($cgiparams{'key'} eq $clientshash{$key}[0]){
 208                         #prepare log entry with decoded remark
 209                         my $rem=HTML::Entities::decode_entities($clientshash{$key}[7]);
 210                         #write logentry
 211                         &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");
 212                         #delete line from hash
 213                         delete $clientshash{$key};
 214                         last;
 215                 }
 216         }
 217         #write back hash
 218         &General::writehasharray("$clients", \%clientshash);
 219         #reload firewallrules to kill connection of client
 220         system("/usr/local/bin/captivectrl");
 221 }
 222
 223 #open webpage, print header and open box
 224 &Header::openpage($Lang::tr{'Captive menu'}, 1, '');
 225 &Header::openbigbox();
 226
 227 # If an error message exists, show a box with the error message
 228 if ($errormessage) {
 229         &Header::openbox('100%', 'left', $Lang::tr{'error messages'});
 230         print $errormessage;
 231         &Header::closebox();
 232 }
 233
 234 # Prints the config box on the website
 235 &Header::openbox('100%', 'left', $Lang::tr{'Captive config'});
 236 print <<END
 237         <form method='post' action='$ENV{'SCRIPT_NAME'}' enctype="multipart/form-data">\n
 238                 <table width='100%' border="0">
 239                 <tr>
 240 END
 241 ;
 242
 243 #check which parameters have to be enabled (from settings file)
 244 $checked{'ENABLE_GREEN'}{'off'} = '';
 245 $checked{'ENABLE_GREEN'}{'on'} = '';
 246 $checked{'ENABLE_GREEN'}{$settings{'ENABLE_GREEN'}} = "checked='checked'";
 247
 248 $checked{'ENABLE_BLUE'}{'off'} = '';
 249 $checked{'ENABLE_BLUE'}{'on'} = '';
 250 $checked{'ENABLE_BLUE'}{$settings{'ENABLE_BLUE'}} = "checked='checked'";
 251
 252 $checked{'UNLIMITED'}{'off'} = '';
 253 $checked{'UNLIMITED'}{'on'} = '';
 254 $checked{'UNLIMITED'}{$settings{'UNLIMITED'}} = "checked='checked'";
 255
 256 $selected{'AUTH'} = ();
 257 $selected{'AUTH'}{'COUPON'} = "";
 258 $selected{'AUTH'}{'TERMS'} = "";
 259 $selected{'AUTH'}{$settings{'AUTH'}} = "selected";
 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>
 272                         $Lang::tr{'Captive authentication'}
 273                 </td>
 274                 <td>
 275                         <select name='AUTH'>
 276                                 <option value="TERMS"  $selected{'AUTH'}{'TERMS'} >$Lang::tr{'Captive terms'}</option>
 277                                 <option value="COUPON" $selected{'AUTH'}{'COUPON'}>$Lang::tr{'Captive coupon'}</option>
 278                         </select>
 279                 </td>
 280         </tr>
 281 END
 282 ;
 283
 284 if ($settings{'AUTH'} eq 'TERMS') {
 285         $selected{'SESSION_TIME'} = ();
 286         $selected{'SESSION_TIME'}{'0'} = "";
 287         $selected{'SESSION_TIME'}{'3600'} = "";
 288         $selected{'SESSION_TIME'}{'86400'} = "";
 289         $selected{'SESSION_TIME'}{'604800'} = "";
 290         $selected{'SESSION_TIME'}{'18144000'} = "";
 291         $selected{'SESSION_TIME'}{$settings{'SESSION_TIME'}} = "selected";
 292
 293         my $terms = &getterms();
 294         print <<END;
 295                 <tr>
 296                         <td></td>
 297                         <td>
 298                                 <textarea cols="50" rows="10" name="TERMS">$terms</textarea>
 299                         </td>
 300                 </tr>
 301
 302                 <tr>
 303                         <td>$Lang::tr{'Captive client session expiry time'}</td>
 304                         <td>
 305                                 <select name="SESSION_TIME">
 306                                         <option value="0"        $selected{'SESSION_TIME'}{'0'}>- $Lang::tr{'unlimited'} -</option>
 307                                         <option value="3600"     $selected{'SESSION_TIME'}{'3600'}>$Lang::tr{'one hour'}</option>
 308                                         <option value="86400"    $selected{'SESSION_TIME'}{'86400'}>$Lang::tr{'24 hours'}</option>
 309                                         <option value="604800"   $selected{'SESSION_TIME'}{'604800'}>$Lang::tr{'one week'}</option>
 310                                         <option value="18144000" $selected{'SESSION_TIME'}{'18144000'}>$Lang::tr{'one month'}</option>
 311                                 </select>
 312                         </td>
 313                 </tr>
 314 END
 315 }
 316
 317 print<<END;
 318         <tr>
 319                 <td colspan="2">
 320                         <br>
 321                         <strong>$Lang::tr{'Captive branding'}</strong>
 322                 </td>
 323         </tr>
 324         <tr>
 325                 <td>
 326                         $Lang::tr{'Captive title'}
 327                 </td>
 328                 <td>
 329                         <input type='text' name='TITLE' value="$settings{'TITLE'}" size='40'>
 330                 </td>
 331         </tr>
 332         <tr>
 333                 <td>$Lang::tr{'Captive brand color'}</td>
 334                 <td>
 335                         <input type="color" name="COLOR" value="$settings{'COLOR'}">
 336                 </td>
 337         </tr>
 338         <tr>
 339                 <td>
 340                         $Lang::tr{'Captive upload logo'}
 341                 </td>
 342                 <td>
 343                         <input type="file" name="logo">
 344                         <br>$Lang::tr{'Captive upload logo recommendations'}
 345                 </td>
 346         </tr>
 347 END
 348
 349 if (-e $logo) {
 350         print <<END;
 351                 <tr>
 352                         <td>$Lang::tr{'Captive logo uploaded'}</td>
 353                         <td>$Lang::tr{'yes'}</td>
 354                 </tr>
 355 END
 356 }
 357
 358 print <<END;
 359         <tr>
 360                 <td></td>
 361                 <td align='right'>
 362                         <input type='submit' name='ACTION' value="$Lang::tr{'save'}"/>
 363                 </td>
 364         </tr>
 365         </table></form>
 366 END
 367
 368 &Header::closebox();
 369
 370 #if settings is set to use coupons, the coupon part has to be displayed
 371 if ($settings{'AUTH'} eq 'COUPON') {
 372         &coupons();
 373 }
 374
 375 # Show active clients
 376 &show_clients();
 377
 378 sub getterms() {
 379         my @ret;
 380
 381         open(FILE, "<:utf8", "/var/ipfire/captive/terms.txt");
 382         while(<FILE>) {
 383                 push(@ret, HTML::Entities::decode_entities($_));
 384         }
 385         close(FILE);
 386
 387         return join(/\n/, @ret);
 388 }
 389
 390 sub gencode(){
 391         #generate a random code only letters from A-Z except 'O'  and 0-9
 392         my @chars = ("A".."N", "P".."Z", "0".."9");
 393         my $randomstring;
 394         $randomstring .= $chars[rand @chars] for 1..8;
 395         return $randomstring;
 396 }
 397
 398 sub coupons() {
 399         &Header::openbox('100%', 'left', $Lang::tr{'Captive generate coupon'});
 400         print <<END;
 401                 <form method='post' action='$ENV{'SCRIPT_NAME'}'>
 402                         <table border='0' width='100%'>
 403                                 <tr>
 404                                         <td width='30%'>
 405                                                 $Lang::tr{'Captive vouchervalid'}
 406                                         </td>
 407                                         <td width='70%'>
 408                                                 <table class='tbl' border='0' width='100%'>
 409                                                         <tr>
 410                                                                 <th>$Lang::tr{'hours'}</th>
 411                                                                 <th>$Lang::tr{'days'}</th>
 412                                                                 <th>$Lang::tr{'weeks'}</th>
 413                                                                 <th>$Lang::tr{'months'}</th>
 414                                                                 <th></th>
 415                                                         </tr>
 416 END
 417
 418                 #print hour-dropdownbox
 419                 my $hrs=3600;
 420                 print "<tr height='40px'><td><select name='EXP_HOUR' style='width:8em;'>";
 421                 print "<option value='0' ";
 422                 print " selected='selected'" if ($settings{'EXP_HOUR'} eq '0');
 423                 print ">--</option>";
 424                 for (my $i = 1; $i<25; $i++){
 425                         my $exp_sec = $i * $hrs;
 426                         print "<option value='$exp_sec' ";
 427                         print " selected='selected'" if ($settings{'EXP_HOUR'} eq $exp_sec);
 428                         print ">$i</option>";
 429                 }
 430                 print "</td><td>";
 431
 432                 #print day-dropdownbox
 433                 my $days=3600*24;
 434                 print "<select name='EXP_DAY' style='width:8em;'>";
 435                 print "<option value='0' ";
 436                 print " selected='selected'" if ($settings{'EXP_DAY'} eq '0');
 437                 print ">--</option>";
 438                 for (my $i = 1; $i<8; $i++){
 439                         my $exp_sec = $i * $days;
 440                         print "<option value='$exp_sec' ";
 441                         print " selected='selected'" if ($settings{'EXP_DAY'} eq $exp_sec);
 442                         print ">$i</option>";
 443                 }
 444                 print "</td><td>";
 445
 446                 #print week-dropdownbox
 447                 my $week=3600*24*7;
 448                 print "<select name='EXP_WEEK' style='width:8em;'>";
 449                 print "<option value='0' ";
 450                 print " selected='selected'" if ($settings{'EXP_WEEK'} eq '0');
 451                 print ">--</option>";
 452                 for (my $i = 1; $i<5; $i++){
 453                         my $exp_sec = $i * $week;
 454                         print "<option value='$exp_sec' ";
 455                         print " selected='selected'" if ($settings{'EXP_WEEK'} eq $exp_sec);
 456                         print ">$i</option>";
 457                 }
 458                 print "</td><td>";
 459
 460                 #print month-dropdownbox
 461                 my $month=3600*24*30;
 462                 print "<select name='EXP_MONTH' style='width:8em;'>";
 463                 print "<option value='0' ";
 464                 print " selected='selected'" if ($settings{'EXP_MONTH'} eq '0');
 465                 print ">--</option>";
 466                 for (my $i = 1; $i<13; $i++){
 467                         my $exp_sec = $i * $month;
 468                         print "<option value='$exp_sec' ";
 469                         print " selected='selected'" if ($settings{'EXP_MONTH'} eq $exp_sec);
 470                         print ">$i</option>";
 471                 }
 472                 print <<END;
 473                                                                 </td>
 474                                                                 <td>
 475                                                                         <label>
 476                                                                                 <input type='checkbox' name='UNLIMITED' $checked{'UNLIMITED'}{'on'} />
 477                                                                                 $Lang::tr{'Captive nolimit'}
 478                                                                         </label>
 479                                                                 </td>
 480                                                         </tr>
 481                                                 </table>
 482                                         </td>
 483                                 </tr>
 484                                 <tr>
 485                                         <td>$Lang::tr{'remark'}</td>
 486                                         <td>
 487                                                 <input type='text' style='width: 98%;' name='REMARK' align='left'>
 488                                         </td>
 489                                 </tr>
 490                         </table>
 491
 492                         <div align="right">
 493                                 <select name="COUNT">
 494                                         <option value="1">1</option>
 495                                         <option value="2">2</option>
 496                                         <option value="3">3</option>
 497                                         <option value="4">4</option>
 498                                         <option value="5">5</option>
 499                                         <option value="6">6</option>
 500                                         <option value="7">7</option>
 501                                         <option value="8">8</option>
 502                                         <option value="9">9</option>
 503                                         <option value="10">10</option>
 504                                         <option value="20">20</option>
 505                                         <option value="50">50</option>
 506                                         <option value="100">100</option>
 507                                 </select>
 508
 509                                 <input type="submit" name="ACTION" value="$Lang::tr{'Captive generate coupon'}">
 510                         </div>
 511                 </form>
 512 END
 513
 514         &Header::closebox();
 515
 516         # Show all coupons if exist
 517         if (! -z $coupons) {
 518                 &show_coupons();
 519         }
 520 }
 521
 522 sub show_coupons() {
 523         &General::readhasharray($coupons, \%couponhash) if (-e $coupons);
 524
 525         #if there are already generated but unsused coupons, print a table
 526         &Header::openbox('100%', 'left', $Lang::tr{'Captive issued coupons'});
 527
 528         print <<END;
 529                 <table class='tbl' border='0'>
 530                         <tr>
 531                                 <th align='center' width='15%'>
 532                                         $Lang::tr{'Captive coupon'}
 533                                 </th>
 534                                 <th align='center' width='15%'>$Lang::tr{'Captive expiry time'}</th>
 535                                 <th align='center' width='65%'>$Lang::tr{'remark'}</th>
 536                                 <th align='center' width='5%'>$Lang::tr{'delete'}</th>
 537                         </tr>
 538 END
 539
 540         foreach my $key (keys %couponhash) {
 541                 my $expirytime = $Lang::tr{'Captive nolimit'};
 542                 if ($couponhash{$key}[2] > 0) {
 543                         $expirytime = &General::format_time($couponhash{$key}[2]);
 544                 }
 545
 546                 if ($count++ % 2) {
 547                         $col="bgcolor='$color{'color20'}'";
 548                 } else {
 549                         $col="bgcolor='$color{'color22'}'";
 550                 }
 551
 552                 print <<END;
 553                         <tr>
 554                                 <td $col align="center">
 555                                         <b>$couponhash{$key}[1]</b>
 556                                 </td>
 557                                 <td $col align="center">
 558                                         $expirytime
 559                                 </td>
 560                                 <td $col align="center">
 561                                         $couponhash{$key}[3]
 562                                 </td>
 563                                 <td $col align="center">
 564                                         <form method='post'>
 565                                                 <input type='image' src='/images/delete.gif' align='middle' alt='$Lang::tr{'delete'}' title='$Lang::tr{'delete'}' />
 566                                                 <input type='hidden' name='ACTION' value='delete-coupon' />
 567                                                 <input type='hidden' name='key' value='$couponhash{$key}[0]' />
 568                                         </form>
 569                                 </td>
 570                         </tr>
 571 END
 572         }
 573
 574         print "</table>";
 575
 576         &Header::closebox();
 577 }
 578
 579 sub show_clients() {
 580         # if there are active clients which use coupons show table
 581         return if ( -z $clients || ! -f $clients );
 582
 583         my $count=0;
 584         my $col;
 585
 586         &Header::openbox('100%', 'left', $Lang::tr{'Captive clients'});
 587
 588         print <<END;
 589                 <table class='tbl' width='100%'>
 590                         <tr>
 591                                 <th align='center' width='15%'>$Lang::tr{'Captive coupon'}</th>
 592                                 <th align='center' width='15%'>$Lang::tr{'Captive activated'}</th>
 593                                 <th align='center' width='15%'>$Lang::tr{'Captive expiry time'}</th>
 594                                 <th align='center' width='10%'>$Lang::tr{'Captive mac'}</th>
 595                                 <th align='center' width='43%'>$Lang::tr{'remark'}</th>
 596                                 <th align='center' width='5%'>$Lang::tr{'delete'}</th>
 597                         </tr>
 598 END
 599
 600         &General::readhasharray($clients, \%clientshash) if (-e $clients);
 601         foreach my $key (keys %clientshash) {
 602                 #calculate time from clientshash (starttime)
 603                 my $starttime = sub{sprintf '%02d.%02d.%04d %02d:%02d', $_[3], $_[4]+1, $_[5]+1900, $_[2], $_[1]  }->(localtime($clientshash{$key}[2]));
 604
 605                 #calculate endtime from clientshash
 606                 my $endtime;
 607                 if ($clientshash{$key}[3] eq '0'){
 608                         $endtime=$Lang::tr{'Captive nolimit'};
 609                 } else {
 610                         $endtime = sub{sprintf '%02d.%02d.%04d %02d:%02d', $_[3], $_[4]+1, $_[5]+1900, $_[2], $_[1]  }->(localtime($clientshash{$key}[2]+$clientshash{$key}[3]));
 611                 }
 612
 613                 if ($count++ % 2) {
 614                         $col="bgcolor='$color{'color20'}'";
 615                 } else {
 616                         $col="bgcolor='$color{'color22'}'";
 617                 }
 618
 619                 my $coupon = ($clientshash{$key}[4] eq "LICENSE") ? $Lang::tr{'Captive terms short'} : $clientshash{$key}[4];
 620
 621                 print <<END;
 622                         <tr>
 623                                 <td $col align="center"><b>$coupon</b></td>
 624                                 <td $col align="center">$starttime</td>
 625                                 <td $col align="center">$endtime</td>
 626                                 <td $col align="center">$clientshash{$key}[0]</td>
 627                                 <td $col align="center">$clientshash{$key}[5]</td>
 628                                 <td $col align="center">
 629                                         <form method='post'>
 630                                                 <input type='image' src='/images/delete.gif' align='middle' alt='$Lang::tr{'delete'}' title='$Lang::tr{'delete'}' />
 631                                                 <input type='hidden' name='ACTION' value='delete-client' />
 632                                                 <input type='hidden' name='key' value='$clientshash{$key}[0]' />
 633                                         </form>
 634                                 </td>
 635                         </tr>
 636 END
 637         }
 638
 639         print "</table>";
 640
 641         &Header::closebox();
 642 }
 643
 644 sub validremark
 645 {
 646         # Checks a hostname against RFC1035
 647         my $remark = $_[0];
 648         # Each part should be at least two characters in length
 649         # but no more than 63 characters
 650         if (length ($remark) < 1 || length ($remark) > 255) {
 651                 return 0;}
 652         # Only valid characters are a-z, A-Z, 0-9 and -
 653         if ($remark !~ /^[a-zäöüA-ZÖÄÜ0-9-.:;\|_()\/\s]*$/) {
 654                 return 0;}
 655         # First character can only be a letter or a digit
 656         if (substr ($remark, 0, 1) !~ /^[a-zäöüA-ZÖÄÜ0-9]*$/) {
 657                 return 0;}
 658         # Last character can only be a letter or a digit
 659         if (substr ($remark, -1, 1) !~ /^[a-zöäüA-ZÖÄÜ0-9.:;_)]*$/) {
 660                 return 0;}
 661         return 1;
 662 }
 663
 664 &Header::closebigbox();
 665 &Header::closepage();