captive: Add headline to T&C box
[ipfire-2.x.git] / 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                 $cgiparams{'TERMS'} = &Header::escape($cgiparams{'TERMS'});
101                 open(FH, ">:utf8", "/var/ipfire/captive/terms.txt") or die("$!");
102                 print FH $cgiparams{'TERMS'};
103                 close(FH);
104                 $cgiparams{'TERMS'} = "";
105
106                 #execute binary to reload firewall rules
107                 system("/usr/local/bin/captivectrl");
108
109                 if ($cgiparams{'ENABLE_BLUE'} eq 'on'){
110                                 system("/usr/local/bin/wirelessctrl");
111                 }
112         }
113 }
114
115 if ($cgiparams{'ACTION'} eq "$Lang::tr{'Captive generate coupon'}") {
116         # Check expiry time
117         if ($cgiparams{'EXP_HOUR'} + $cgiparams{'EXP_DAY'} + $cgiparams{'EXP_WEEK'} + $cgiparams{'EXP_MONTH'} == 0 && $cgiparams{'UNLIMITED'} == '') {
118                 $errormessage = $Lang::tr{'Captive noexpiretime'};
119         }
120
121         #check valid remark
122         if ($cgiparams{'REMARK'} ne '' && !&validremark($cgiparams{'REMARK'})){
123                 $errormessage=$Lang::tr{'fwhost err remark'};
124         }
125
126         if (!$errormessage) {
127                 # Remember selected values
128                 foreach my $val (("UNLIMITED", "EXP_HOUR", "EXP_DAY", "EXP_WEEK", "EXP_MONTH")) {
129                         $settings{$val} = $cgiparams{$val};
130                 }
131                 &General::writehash($settingsfile, \%settings);
132
133                 &General::readhasharray($coupons, \%couponhash) if (-e $coupons);
134                 my $now = time();
135
136                 # Calculate expiry time in seconds
137                 my $expires = 0;
138
139                 if ($settings{'UNLIMITED'} ne 'on') {
140                         $expires += $settings{'EXP_HOUR'};
141                         $expires += $settings{'EXP_DAY'};
142                         $expires += $settings{'EXP_WEEK'};
143                         $expires += $settings{'EXP_MONTH'};
144                 }
145
146                 my $count = $cgiparams{'COUNT'} || 1;
147                 while($count-- > 0) {
148                         # Generate a new code
149                         my $code = &gencode();
150
151                         # Check if the coupon code already exists
152                         foreach my $key (keys %couponhash) {
153                                 if($couponhash{$key}[1] eq $code) {
154                                         # Code already exists, so try again
155                                         $code = "";
156                                         $count++;
157                                         last;
158                                 }
159                         }
160
161                         next if ($code eq "");
162
163                         # Get a new key from hash
164                         my $key = &General::findhasharraykey(\%couponhash);
165
166                         # Initialize all fields
167                         foreach my $i (0 .. 3) { $couponhash{$key}[$i] = ""; }
168
169                         $couponhash{$key}[0] = $now;
170                         $couponhash{$key}[1] = $code;
171                         $couponhash{$key}[2] = $expires;
172                         $couponhash{$key}[3] = $cgiparams{'REMARK'};
173                 }
174
175                 # Save everything to disk
176                 &General::writehasharray($coupons, \%couponhash);
177         }
178 }
179
180 if ($cgiparams{'ACTION'} eq 'delete-coupon') {
181         #deletes an already generated but unused voucher
182
183         #read all generated vouchers
184         &General::readhasharray($coupons, \%couponhash) if (-e $coupons);
185         foreach my $key (keys %couponhash) {
186                 if($cgiparams{'key'} eq $couponhash{$key}[0]){
187                         #write logenty with decoded remark
188                         my $rem=HTML::Entities::decode_entities($couponhash{$key}[4]);
189                         &General::log("Captive", "Delete unused coupon $couponhash{$key}[1] $couponhash{$key}[2] hours valid expires on $couponhash{$key}[3] remark $rem");
190                         #delete line from hash
191                         delete $couponhash{$key};
192                         last;
193                 }
194         }
195         #write back hash
196         &General::writehasharray($coupons, \%couponhash);
197 }
198
199 if ($cgiparams{'ACTION'} eq 'delete-client') {
200         #delete voucher and connection in use
201
202         #read all active clients
203         &General::readhasharray($clients, \%clientshash) if (-e $clients);
204         foreach my $key (keys %clientshash) {
205                 if($cgiparams{'key'} eq $clientshash{$key}[0]){
206                         #prepare log entry with decoded remark
207                         my $rem=HTML::Entities::decode_entities($clientshash{$key}[7]);
208                         #write logentry
209                         &General::log("Captive", "Deleted client in use $clientshash{$key}[1] $clientshash{$key}[2] hours valid expires on $clientshash{$key}[3] remark $rem - Connection will be terminated");
210                         #delete line from hash
211                         delete $clientshash{$key};
212                         last;
213                 }
214         }
215         #write back hash
216         &General::writehasharray("$clients", \%clientshash);
217         #reload firewallrules to kill connection of client
218         system("/usr/local/bin/captivectrl");
219 }
220
221 #open webpage, print header and open box
222 &Header::openpage($Lang::tr{'Captive menu'}, 1, '');
223 &Header::openbigbox();
224
225 # If an error message exists, show a box with the error message
226 if ($errormessage) {
227         &Header::openbox('100%', 'left', $Lang::tr{'error messages'});
228         print $errormessage;
229         &Header::closebox();
230 }
231
232 # Prints the config box on the website
233 &Header::openbox('100%', 'left', $Lang::tr{'Captive config'});
234 print <<END
235         <form method='post' action='$ENV{'SCRIPT_NAME'}' enctype="multipart/form-data">\n
236                 <table width='100%' border="0">
237                 <tr>
238 END
239 ;
240
241 #check which parameters have to be enabled (from settings file)
242 $checked{'ENABLE_GREEN'}{'off'} = '';
243 $checked{'ENABLE_GREEN'}{'on'} = '';
244 $checked{'ENABLE_GREEN'}{$settings{'ENABLE_GREEN'}} = "checked='checked'";
245
246 $checked{'ENABLE_BLUE'}{'off'} = '';
247 $checked{'ENABLE_BLUE'}{'on'} = '';
248 $checked{'ENABLE_BLUE'}{$settings{'ENABLE_BLUE'}} = "checked='checked'";
249
250 $checked{'UNLIMITED'}{'off'} = '';
251 $checked{'UNLIMITED'}{'on'} = '';
252 $checked{'UNLIMITED'}{$settings{'UNLIMITED'}} = "checked='checked'";
253
254 $selected{'AUTH'} = ();
255 $selected{'AUTH'}{'COUPON'} = "";
256 $selected{'AUTH'}{'TERMS'} = "";
257 $selected{'AUTH'}{$settings{'AUTH'}} = "selected";
258
259 if ($netsettings{'GREEN_DEV'}){
260         print "<td width='30%'>$Lang::tr{'Captive active on'} <font color='$Header::colourgreen'>Green</font></td><td><input type='checkbox' name='ENABLE_GREEN' $checked{'ENABLE_GREEN'}{'on'} /></td></tr>";
261 }
262 if ($netsettings{'BLUE_DEV'}){
263         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>";
264 }
265
266 print<<END
267         </tr>
268         <tr>
269                 <td>
270                         $Lang::tr{'Captive authentication'}
271                 </td>
272                 <td>
273                         <select name='AUTH'>
274                                 <option value="TERMS"  $selected{'AUTH'}{'TERMS'} >$Lang::tr{'Captive terms'}</option>
275                                 <option value="COUPON" $selected{'AUTH'}{'COUPON'}>$Lang::tr{'Captive coupon'}</option>
276                         </select>
277                 </td>
278         </tr>
279 END
280 ;
281
282 if ($settings{'AUTH'} eq 'TERMS') {
283         $selected{'SESSION_TIME'} = ();
284         $selected{'SESSION_TIME'}{'0'} = "";
285         $selected{'SESSION_TIME'}{'3600'} = "";
286         $selected{'SESSION_TIME'}{'28800'} = "";
287         $selected{'SESSION_TIME'}{'86400'} = "";
288         $selected{'SESSION_TIME'}{'604800'} = "";
289         $selected{'SESSION_TIME'}{'18144000'} = "";
290         $selected{'SESSION_TIME'}{$settings{'SESSION_TIME'}} = "selected";
291
292         print <<END;
293                 <tr>
294                         <td>$Lang::tr{'Captive client session expiry time'}</td>
295                         <td>
296                                 <select name="SESSION_TIME">
297                                         <option value="0"        $selected{'SESSION_TIME'}{'0'}>- $Lang::tr{'unlimited'} -</option>
298                                         <option value="3600"     $selected{'SESSION_TIME'}{'3600'}>$Lang::tr{'one hour'}</option>
299                                         <option value="28800"    $selected{'SESSION_TIME'}{'28800'}>$Lang::tr{'eight hours'}</option>
300                                         <option value="86400"    $selected{'SESSION_TIME'}{'86400'}>$Lang::tr{'24 hours'}</option>
301                                         <option value="604800"   $selected{'SESSION_TIME'}{'604800'}>$Lang::tr{'one week'}</option>
302                                         <option value="18144000" $selected{'SESSION_TIME'}{'18144000'}>$Lang::tr{'one month'}</option>
303                                 </select>
304                         </td>
305                 </tr>
306 END
307 }
308
309 print<<END;
310         <tr>
311                 <td colspan="2">
312                         <br>
313                         <strong>$Lang::tr{'Captive branding'}</strong>
314                 </td>
315         </tr>
316         <tr>
317                 <td>
318                         $Lang::tr{'Captive title'}
319                 </td>
320                 <td>
321                         <input type='text' name='TITLE' value="$settings{'TITLE'}" size='40'>
322                 </td>
323         </tr>
324         <tr>
325                 <td>$Lang::tr{'Captive brand color'}</td>
326                 <td>
327                         <input type="color" name="COLOR" value="$settings{'COLOR'}">
328                 </td>
329         </tr>
330         <tr>
331                 <td>
332                         $Lang::tr{'Captive upload logo'}
333                 </td>
334                 <td>
335                         <input type="file" name="logo">
336                         <br>$Lang::tr{'Captive upload logo recommendations'}
337                 </td>
338         </tr>
339 END
340
341 if (-e $logo) {
342         print <<END;
343                 <tr>
344                         <td>$Lang::tr{'Captive logo uploaded'}</td>
345                         <td>$Lang::tr{'yes'}</td>
346                 </tr>
347 END
348 }
349
350 my $terms = &getterms();
351 print <<END;
352         <tr>
353                 <td>$Lang::tr{'Captive terms'}</td>
354                 <td>
355                         <textarea cols="50" rows="10" name="TERMS">$terms</textarea>
356                 </td>
357         </tr>
358         <tr>
359                 <td></td>
360                 <td align='right'>
361                         <input type='submit' name='ACTION' value="$Lang::tr{'save'}"/>
362                 </td>
363         </tr>
364         </table></form>
365 END
366
367 &Header::closebox();
368
369 #if settings is set to use coupons, the coupon part has to be displayed
370 if ($settings{'AUTH'} eq 'COUPON') {
371         &coupons();
372 }
373
374 # Show active clients
375 &show_clients();
376
377 sub getterms() {
378         my @ret;
379
380         open(FILE, "<:utf8", "/var/ipfire/captive/terms.txt");
381         while(<FILE>) {
382                 push(@ret, HTML::Entities::decode_entities($_));
383         }
384         close(FILE);
385
386         return join(/\n/, @ret);
387 }
388
389 sub gencode(){
390         #generate a random code only letters from A-Z except 'O'  and 0-9
391         my @chars = ("A".."N", "P".."Z", "0".."9");
392         my $randomstring;
393         $randomstring .= $chars[rand @chars] for 1..8;
394         return $randomstring;
395 }
396
397 sub coupons() {
398         &Header::openbox('100%', 'left', $Lang::tr{'Captive generate coupon'});
399         print <<END;
400                 <form method='post' action='$ENV{'SCRIPT_NAME'}'>
401                         <table border='0' width='100%'>
402                                 <tr>
403                                         <td width='30%'>
404                                                 $Lang::tr{'Captive vouchervalid'}
405                                         </td>
406                                         <td width='70%'>
407                                                 <table class='tbl' border='0' width='100%'>
408                                                         <tr>
409                                                                 <th>$Lang::tr{'hours'}</th>
410                                                                 <th>$Lang::tr{'days'}</th>
411                                                                 <th>$Lang::tr{'weeks'}</th>
412                                                                 <th>$Lang::tr{'months'}</th>
413                                                                 <th></th>
414                                                         </tr>
415 END
416
417                 #print hour-dropdownbox
418                 my $hrs=3600;
419                 print "<tr height='40px'><td><select name='EXP_HOUR' style='width:8em;'>";
420                 print "<option value='0' ";
421                 print " selected='selected'" if ($settings{'EXP_HOUR'} eq '0');
422                 print ">--</option>";
423                 for (my $i = 1; $i<25; $i++){
424                         my $exp_sec = $i * $hrs;
425                         print "<option value='$exp_sec' ";
426                         print " selected='selected'" if ($settings{'EXP_HOUR'} eq $exp_sec);
427                         print ">$i</option>";
428                 }
429                 print "</td><td>";
430
431                 #print day-dropdownbox
432                 my $days=3600*24;
433                 print "<select name='EXP_DAY' style='width:8em;'>";
434                 print "<option value='0' ";
435                 print " selected='selected'" if ($settings{'EXP_DAY'} eq '0');
436                 print ">--</option>";
437                 for (my $i = 1; $i<8; $i++){
438                         my $exp_sec = $i * $days;
439                         print "<option value='$exp_sec' ";
440                         print " selected='selected'" if ($settings{'EXP_DAY'} eq $exp_sec);
441                         print ">$i</option>";
442                 }
443                 print "</td><td>";
444
445                 #print week-dropdownbox
446                 my $week=3600*24*7;
447                 print "<select name='EXP_WEEK' style='width:8em;'>";
448                 print "<option value='0' ";
449                 print " selected='selected'" if ($settings{'EXP_WEEK'} eq '0');
450                 print ">--</option>";
451                 for (my $i = 1; $i<5; $i++){
452                         my $exp_sec = $i * $week;
453                         print "<option value='$exp_sec' ";
454                         print " selected='selected'" if ($settings{'EXP_WEEK'} eq $exp_sec);
455                         print ">$i</option>";
456                 }
457                 print "</td><td>";
458
459                 #print month-dropdownbox
460                 my $month=3600*24*30;
461                 print "<select name='EXP_MONTH' style='width:8em;'>";
462                 print "<option value='0' ";
463                 print " selected='selected'" if ($settings{'EXP_MONTH'} eq '0');
464                 print ">--</option>";
465                 for (my $i = 1; $i<13; $i++){
466                         my $exp_sec = $i * $month;
467                         print "<option value='$exp_sec' ";
468                         print " selected='selected'" if ($settings{'EXP_MONTH'} eq $exp_sec);
469                         print ">$i</option>";
470                 }
471                 print <<END;
472                                                                 </td>
473                                                                 <td>
474                                                                         <label>
475                                                                                 <input type='checkbox' name='UNLIMITED' $checked{'UNLIMITED'}{'on'} />
476                                                                                 $Lang::tr{'Captive nolimit'}
477                                                                         </label>
478                                                                 </td>
479                                                         </tr>
480                                                 </table>
481                                         </td>
482                                 </tr>
483                                 <tr>
484                                         <td>$Lang::tr{'remark'}</td>
485                                         <td>
486                                                 <input type='text' style='width: 98%;' name='REMARK' align='left'>
487                                         </td>
488                                 </tr>
489                         </table>
490
491                         <div align="right">
492                                 <select name="COUNT">
493                                         <option value="1">1</option>
494                                         <option value="2">2</option>
495                                         <option value="3">3</option>
496                                         <option value="4">4</option>
497                                         <option value="5">5</option>
498                                         <option value="6">6</option>
499                                         <option value="7">7</option>
500                                         <option value="8">8</option>
501                                         <option value="9">9</option>
502                                         <option value="10">10</option>
503                                         <option value="20">20</option>
504                                         <option value="50">50</option>
505                                         <option value="100">100</option>
506                                 </select>
507
508                                 <input type="submit" name="ACTION" value="$Lang::tr{'Captive generate coupon'}">
509                         </div>
510                 </form>
511 END
512
513         &Header::closebox();
514
515         # Show all coupons if exist
516         if (! -z $coupons) {
517                 &show_coupons();
518         }
519 }
520
521 sub show_coupons() {
522         &General::readhasharray($coupons, \%couponhash) if (-e $coupons);
523
524         #if there are already generated but unsused coupons, print a table
525         &Header::openbox('100%', 'left', $Lang::tr{'Captive issued coupons'});
526
527         print <<END;
528                 <table class='tbl' border='0'>
529                         <tr>
530                                 <th align='center' width='15%'>
531                                         $Lang::tr{'Captive coupon'}
532                                 </th>
533                                 <th align='center' width='15%'>$Lang::tr{'Captive expiry time'}</th>
534                                 <th align='center' width='65%'>$Lang::tr{'remark'}</th>
535                                 <th align='center' width='5%'>$Lang::tr{'delete'}</th>
536                         </tr>
537 END
538
539         foreach my $key (keys %couponhash) {
540                 my $expirytime = $Lang::tr{'Captive nolimit'};
541                 if ($couponhash{$key}[2] > 0) {
542                         $expirytime = &General::format_time($couponhash{$key}[2]);
543                 }
544
545                 if ($count++ % 2) {
546                         $col="bgcolor='$color{'color20'}'";
547                 } else {
548                         $col="bgcolor='$color{'color22'}'";
549                 }
550
551                 print <<END;
552                         <tr>
553                                 <td $col align="center">
554                                         <b>$couponhash{$key}[1]</b>
555                                 </td>
556                                 <td $col align="center">
557                                         $expirytime
558                                 </td>
559                                 <td $col align="center">
560                                         $couponhash{$key}[3]
561                                 </td>
562                                 <td $col align="center">
563                                         <form method='post'>
564                                                 <input type='image' src='/images/delete.gif' align='middle' alt='$Lang::tr{'delete'}' title='$Lang::tr{'delete'}' />
565                                                 <input type='hidden' name='ACTION' value='delete-coupon' />
566                                                 <input type='hidden' name='key' value='$couponhash{$key}[0]' />
567                                         </form>
568                                 </td>
569                         </tr>
570 END
571         }
572
573         print "</table>";
574
575         &Header::closebox();
576 }
577
578 sub show_clients() {
579         # if there are active clients which use coupons show table
580         return if ( -z $clients || ! -f $clients );
581
582         my $count=0;
583         my $col;
584
585         &Header::openbox('100%', 'left', $Lang::tr{'Captive clients'});
586
587         print <<END;
588                 <table class='tbl' width='100%'>
589                         <tr>
590                                 <th align='center' width='15%'>$Lang::tr{'Captive coupon'}</th>
591                                 <th align='center' width='15%'>$Lang::tr{'Captive activated'}</th>
592                                 <th align='center' width='15%'>$Lang::tr{'Captive expiry time'}</th>
593                                 <th align='center' width='10%'>$Lang::tr{'Captive mac'}</th>
594                                 <th align='center' width='43%'>$Lang::tr{'remark'}</th>
595                                 <th align='center' width='5%'>$Lang::tr{'delete'}</th>
596                         </tr>
597 END
598
599         &General::readhasharray($clients, \%clientshash) if (-e $clients);
600         foreach my $key (keys %clientshash) {
601                 #calculate time from clientshash (starttime)
602                 my $starttime = sub{sprintf '%02d.%02d.%04d %02d:%02d', $_[3], $_[4]+1, $_[5]+1900, $_[2], $_[1]  }->(localtime($clientshash{$key}[2]));
603
604                 #calculate endtime from clientshash
605                 my $endtime;
606                 if ($clientshash{$key}[3] eq '0'){
607                         $endtime=$Lang::tr{'Captive nolimit'};
608                 } else {
609                         $endtime = sub{sprintf '%02d.%02d.%04d %02d:%02d', $_[3], $_[4]+1, $_[5]+1900, $_[2], $_[1]  }->(localtime($clientshash{$key}[2]+$clientshash{$key}[3]));
610                 }
611
612                 if ($count++ % 2) {
613                         $col="bgcolor='$color{'color20'}'";
614                 } else {
615                         $col="bgcolor='$color{'color22'}'";
616                 }
617
618                 my $coupon = ($clientshash{$key}[4] eq "LICENSE") ? $Lang::tr{'Captive terms short'} : $clientshash{$key}[4];
619
620                 print <<END;
621                         <tr>
622                                 <td $col align="center"><b>$coupon</b></td>
623                                 <td $col align="center">$starttime</td>
624                                 <td $col align="center">$endtime</td>
625                                 <td $col align="center">$clientshash{$key}[0]</td>
626                                 <td $col align="center">$clientshash{$key}[5]</td>
627                                 <td $col align="center">
628                                         <form method='post'>
629                                                 <input type='image' src='/images/delete.gif' align='middle' alt='$Lang::tr{'delete'}' title='$Lang::tr{'delete'}' />
630                                                 <input type='hidden' name='ACTION' value='delete-client' />
631                                                 <input type='hidden' name='key' value='$clientshash{$key}[0]' />
632                                         </form>
633                                 </td>
634                         </tr>
635 END
636         }
637
638         print "</table>";
639
640         &Header::closebox();
641 }
642
643 sub validremark
644 {
645         # Checks a hostname against RFC1035
646         my $remark = $_[0];
647         # Each part should be at least two characters in length
648         # but no more than 63 characters
649         if (length ($remark) < 1 || length ($remark) > 255) {
650                 return 0;}
651         # Only valid characters are a-z, A-Z, 0-9 and -
652         if ($remark !~ /^[a-zäöüA-ZÖÄÜ0-9-.:;\|_()\/\s]*$/) {
653                 return 0;}
654         # First character can only be a letter or a digit
655         if (substr ($remark, 0, 1) !~ /^[a-zäöüA-ZÖÄÜ0-9]*$/) {
656                 return 0;}
657         # Last character can only be a letter or a digit
658         if (substr ($remark, -1, 1) !~ /^[a-zöäüA-ZÖÄÜ0-9.:;_)]*$/) {
659                 return 0;}
660         return 1;
661 }
662
663 &Header::closebigbox();
664 &Header::closepage();