65cc349baf8e76a68b2e7aa5a7cc88bbf164d79c
[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 Encode;
24 use HTML::Entities();
25 use File::Basename;
26 use PDF::API2;
27 use constant mm => 25.4 / 72;
28
29 # enable only the following on debugging purpose
30 #use warnings;
31 #use CGI::Carp 'fatalsToBrowser';
32
33 require '/var/ipfire/general-functions.pl';
34 require "${General::swroot}/lang.pl";
35 require "${General::swroot}/header.pl";
36
37 my %session_times = (
38         3600            => $Lang::tr{'one hour'},
39         14400           => $Lang::tr{'four hours'},
40         28800           => $Lang::tr{'eight hours'},
41         43200           => $Lang::tr{'twelve hours'},
42         86400           => $Lang::tr{'24 hours'},
43         604800          => $Lang::tr{'one week'},
44         1209600         => $Lang::tr{'two weeks'},
45         2592000         => $Lang::tr{'one month'},
46         31536000        => $Lang::tr{'one year'},
47         0               => "- $Lang::tr{'unlimited'} -",
48 );
49
50 my %selected = ();
51
52 my $coupons = "${General::swroot}/captive/coupons";
53 my %couponhash = ();
54
55 my $logo = "${General::swroot}/captive/logo.dat";
56
57 my %settings=();
58 my %mainsettings;
59 my %color;
60 my %cgiparams=();
61 my %netsettings=();
62 my %checked=();
63 my $errormessage='';
64 my $clients="${General::swroot}/captive/clients";
65 my %clientshash=();
66 my $settingsfile="${General::swroot}/captive/settings";
67 unless (-e $settingsfile)       { system("touch $settingsfile"); }
68
69 &Header::getcgihash(\%cgiparams);
70
71 &General::readhash("${General::swroot}/main/settings", \%mainsettings);
72 &General::readhash("/srv/web/ipfire/html/themes/".$mainsettings{'THEME'}."/include/colors.txt", \%color);
73 &General::readhash("$settingsfile", \%settings) if(-f $settingsfile);
74 &General::readhash("${General::swroot}/ethernet/settings", \%netsettings);
75
76 if ($cgiparams{'ACTION'} eq "export-coupons") {
77         my $pdf = &generate_pdf();
78
79         print "Content-Type: application/pdf\n";
80         print "Content-Disposition: attachment; filename=captive-portal-coupons.pdf\n";
81         print "\n"; # end headers
82
83         # Send PDF
84         print $pdf;
85
86         exit(0);
87 }
88
89
90 &Header::showhttpheaders();
91
92 if ($cgiparams{'ACTION'} eq $Lang::tr{'save'}) {
93         my $file = $cgiparams{'logo'};
94         if ($file) {
95                 # Check if the file extension is PNG/JPEG
96                 chomp $file;
97
98                 my ($name, $path, $ext) = fileparse($file, qr/\.[^.]*$/);
99                 if ($ext ne ".png" && $ext ne ".jpg" && $ext ne ".jpeg") {
100                         $errormessage = $Lang::tr{'Captive wrong ext'};
101                 }
102         }
103
104         $settings{'ENABLE_GREEN'}               = $cgiparams{'ENABLE_GREEN'};
105         $settings{'ENABLE_BLUE'}                = $cgiparams{'ENABLE_BLUE'};
106         $settings{'AUTH'}                               = $cgiparams{'AUTH'};
107         $settings{'TITLE'}                              = $cgiparams{'TITLE'};
108         $settings{'COLOR'}                      = $cgiparams{'COLOR'};
109         $settings{'SESSION_TIME'}               = $cgiparams{'SESSION_TIME'};
110
111         if (!$errormessage){
112                 #Check if we need to upload a new logo
113                 if ($file) {
114                         # Save logo
115                         my ($filehandle) = CGI::upload("logo");
116
117                         # XXX check filesize
118
119                         open(FILE, ">$logo");
120                         binmode $filehandle;
121                         while (<$filehandle>) {
122                                 print FILE;
123                         }
124                         close(FILE);
125                 }
126
127                 &General::writehash("$settingsfile", \%settings);
128
129                 # Save terms
130                 $cgiparams{'TERMS'} = &Header::escape($cgiparams{'TERMS'});
131                 open(FH, ">:utf8", "/var/ipfire/captive/terms.txt") or die("$!");
132                 print FH $cgiparams{'TERMS'};
133                 close(FH);
134                 $cgiparams{'TERMS'} = "";
135
136                 #execute binary to reload firewall rules
137                 system("/usr/local/bin/captivectrl");
138
139                 if ($cgiparams{'ENABLE_BLUE'} eq 'on'){
140                                 system("/usr/local/bin/wirelessctrl");
141                 }
142         }
143 }
144
145 if ($cgiparams{'ACTION'} eq "$Lang::tr{'Captive generate coupons'}") {
146         #check valid remark
147         if ($cgiparams{'REMARK'} ne '' && !&validremark($cgiparams{'REMARK'})){
148                 $errormessage=$Lang::tr{'fwhost err remark'};
149         }
150
151         if (!$errormessage) {
152                 # Remember selected values
153                 foreach my $val (("SESSION_TIME", "COUNT", "REMARK")) {
154                         $settings{$val} = $cgiparams{$val};
155                 }
156                 &General::writehash($settingsfile, \%settings);
157
158                 &General::readhasharray($coupons, \%couponhash) if (-e $coupons);
159                 my $now = time();
160
161                 # Expiry time in seconds
162                 my $expires = $settings{'SESSION_TIME'};
163
164                 my $count = $settings{'COUNT'} || 1;
165                 while($count-- > 0) {
166                         # Generate a new code
167                         my $code = &gencode();
168
169                         # Check if the coupon code already exists
170                         foreach my $key (keys %couponhash) {
171                                 if($couponhash{$key}[1] eq $code) {
172                                         # Code already exists, so try again
173                                         $code = "";
174                                         $count++;
175                                         last;
176                                 }
177                         }
178
179                         next if ($code eq "");
180
181                         # Get a new key from hash
182                         my $key = &General::findhasharraykey(\%couponhash);
183
184                         # Initialize all fields
185                         foreach my $i (0 .. 3) { $couponhash{$key}[$i] = ""; }
186
187                         $couponhash{$key}[0] = $now;
188                         $couponhash{$key}[1] = $code;
189                         $couponhash{$key}[2] = $expires;
190                         $couponhash{$key}[3] = $settings{'REMARK'};
191                 }
192
193                 # Save everything to disk
194                 &General::writehasharray($coupons, \%couponhash);
195         }
196 }
197
198 if ($cgiparams{'ACTION'} eq 'delete-coupon') {
199         #deletes an already generated but unused voucher
200
201         #read all generated vouchers
202         &General::readhasharray($coupons, \%couponhash) if (-e $coupons);
203         foreach my $key (keys %couponhash) {
204                 if($cgiparams{'key'} eq $couponhash{$key}[0]){
205                         #write logenty with decoded remark
206                         my $rem=HTML::Entities::decode_entities($couponhash{$key}[4]);
207                         &General::log("Captive", "Delete unused coupon $couponhash{$key}[1] $couponhash{$key}[2] hours valid expires on $couponhash{$key}[3] remark $rem");
208                         #delete line from hash
209                         delete $couponhash{$key};
210                         last;
211                 }
212         }
213         #write back hash
214         &General::writehasharray($coupons, \%couponhash);
215 }
216
217 if ($cgiparams{'ACTION'} eq 'delete-client') {
218         #delete voucher and connection in use
219
220         #read all active clients
221         &General::readhasharray($clients, \%clientshash) if (-e $clients);
222         foreach my $key (keys %clientshash) {
223                 if($cgiparams{'key'} eq $clientshash{$key}[0]){
224                         #prepare log entry with decoded remark
225                         my $rem=HTML::Entities::decode_entities($clientshash{$key}[7]);
226                         #write logentry
227                         &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");
228                         #delete line from hash
229                         delete $clientshash{$key};
230                         last;
231                 }
232         }
233         #write back hash
234         &General::writehasharray("$clients", \%clientshash);
235         #reload firewallrules to kill connection of client
236         system("/usr/local/bin/captivectrl");
237 }
238
239 #open webpage, print header and open box
240 &Header::openpage($Lang::tr{'Captive'}, 1, '');
241 &Header::openbigbox();
242
243 # If an error message exists, show a box with the error message
244 if ($errormessage) {
245         &Header::openbox('100%', 'left', $Lang::tr{'error messages'});
246         print $errormessage;
247         &Header::closebox();
248 }
249
250 # Prints the config box on the website
251 &Header::openbox('100%', 'left', $Lang::tr{'Captive config'});
252 print <<END
253         <form method='post' action='$ENV{'SCRIPT_NAME'}' enctype="multipart/form-data">\n
254                 <table width='100%' border="0">
255 END
256 ;
257
258 #check which parameters have to be enabled (from settings file)
259 $checked{'ENABLE_GREEN'}{'off'} = '';
260 $checked{'ENABLE_GREEN'}{'on'} = '';
261 $checked{'ENABLE_GREEN'}{$settings{'ENABLE_GREEN'}} = "checked='checked'";
262
263 $checked{'ENABLE_BLUE'}{'off'} = '';
264 $checked{'ENABLE_BLUE'}{'on'} = '';
265 $checked{'ENABLE_BLUE'}{$settings{'ENABLE_BLUE'}} = "checked='checked'";
266
267 $checked{'UNLIMITED'}{'off'} = '';
268 $checked{'UNLIMITED'}{'on'} = '';
269 $checked{'UNLIMITED'}{$settings{'UNLIMITED'}} = "checked='checked'";
270
271 $selected{'AUTH'} = ();
272 $selected{'AUTH'}{'COUPON'} = "";
273 $selected{'AUTH'}{'TERMS'} = "";
274 $selected{'AUTH'}{$settings{'AUTH'}} = "selected";
275
276 if ($netsettings{'GREEN_DEV'}){
277         print <<END;
278                 <tr>
279                         <td width='30%'>
280                                 $Lang::tr{'Captive active on'}
281                                 <font color='$Header::colourgreen'>$Lang::tr{'green'}</font>
282                         </td>
283                         <td>
284                                 <input type='checkbox' name='ENABLE_GREEN' $checked{'ENABLE_GREEN'}{'on'} />
285                         </td>
286                 </tr>
287 END
288 }
289
290 if ($netsettings{'BLUE_DEV'}){
291         print <<END;
292                 <tr>
293                         <td width='30%'>
294                                 $Lang::tr{'Captive active on'}
295                                 <font color='$Header::colourblue'>$Lang::tr{'blue'}</font>
296                         </td>
297                         <td>
298                                 <input type='checkbox' name='ENABLE_BLUE' $checked{'ENABLE_BLUE'}{'on'} />
299                         </td>
300                 </tr>
301 END
302 }
303
304 print<<END
305         <tr>
306                 <td>
307                         $Lang::tr{'Captive authentication'}
308                 </td>
309                 <td>
310                         <select name='AUTH'>
311                                 <option value="TERMS"  $selected{'AUTH'}{'TERMS'} >$Lang::tr{'Captive terms'}</option>
312                                 <option value="COUPON" $selected{'AUTH'}{'COUPON'}>$Lang::tr{'Captive coupon'}</option>
313                         </select>
314                 </td>
315         </tr>
316 END
317 ;
318
319 if ($settings{'AUTH'} eq 'TERMS') {
320         $selected{'SESSION_TIME'} = ();
321         foreach my $session_time (keys %session_times) {
322                 $selected{'SESSION_TIME'}{$session_time} = "";
323         }
324         $selected{'SESSION_TIME'}{$settings{'SESSION_TIME'}} = "selected";
325
326         print <<END;
327                 <tr>
328                         <td>$Lang::tr{'Captive client session expiry time'}</td>
329                         <td>
330                                 <select name="SESSION_TIME">
331 END
332
333         foreach my $session_time (sort { $a <=> $b } keys %session_times) {
334                 print <<END;
335                                         <option value="$session_time" $selected{'SESSION_TIME'}{$session_time}>
336                                                 $session_times{$session_time}
337                                         </option>
338 END
339         }
340
341         print <<END;
342                                 </select>
343                         </td>
344                 </tr>
345 END
346 }
347
348 print<<END;
349         <tr>
350                 <td colspan="2">
351                         <br>
352                         <strong>$Lang::tr{'Captive branding'}</strong>
353                 </td>
354         </tr>
355         <tr>
356                 <td>
357                         $Lang::tr{'Captive title'}
358                 </td>
359                 <td>
360                         <input type='text' name='TITLE' value="$settings{'TITLE'}" size='40'>
361                 </td>
362         </tr>
363         <tr>
364                 <td>$Lang::tr{'Captive brand color'}</td>
365                 <td>
366                         <input type="color" name="COLOR" value="$settings{'COLOR'}">
367                 </td>
368         </tr>
369         <tr>
370                 <td>
371                         $Lang::tr{'Captive upload logo'}
372                 </td>
373                 <td>
374                         <input type="file" name="logo">
375                         <br>$Lang::tr{'Captive upload logo recommendations'}
376                 </td>
377         </tr>
378 END
379
380 if (-e $logo) {
381         print <<END;
382                 <tr>
383                         <td>$Lang::tr{'Captive logo uploaded'}</td>
384                         <td>$Lang::tr{'yes'}</td>
385                 </tr>
386 END
387 }
388
389 my $terms = &getterms();
390 print <<END;
391         <tr>
392                 <td>$Lang::tr{'Captive terms'}</td>
393                 <td>
394                         <textarea cols="50" rows="10" name="TERMS">$terms</textarea>
395                 </td>
396         </tr>
397         <tr>
398                 <td></td>
399                 <td align='right'>
400                         <input type='submit' name='ACTION' value="$Lang::tr{'save'}"/>
401                 </td>
402         </tr>
403         </table></form>
404 END
405
406 &Header::closebox();
407
408 #if settings is set to use coupons, the coupon part has to be displayed
409 if ($settings{'AUTH'} eq 'COUPON') {
410         &coupons();
411 }
412
413 # Show active clients
414 &show_clients();
415
416 sub getterms() {
417         my @ret;
418
419         open(FILE, "<:utf8", "/var/ipfire/captive/terms.txt");
420         while(<FILE>) {
421                 push(@ret, HTML::Entities::decode_entities($_));
422         }
423         close(FILE);
424
425         return join(/\n/, @ret);
426 }
427
428 sub gencode(){
429         #generate a random code only letters from A-Z except 'O'  and 0-9
430         my @chars = ("A".."N", "P".."Z", "0".."9");
431         my $randomstring;
432         $randomstring .= $chars[rand @chars] for 1..8;
433         return $randomstring;
434 }
435
436 sub coupons() {
437         &Header::openbox('100%', 'left', $Lang::tr{'Captive generate coupons'});
438
439         $selected{'SESSION_TIME'} = ();
440         foreach my $session_time (keys %session_times) {
441                 $selected{'SESSION_TIME'}{$session_time} = "";
442         }
443         $selected{'SESSION_TIME'}{$settings{'SESSION_TIME'}} = "selected";
444
445         print <<END;
446                 <form method='post' action='$ENV{'SCRIPT_NAME'}'>
447                         <table border='0' width='100%'>
448                                 <tr>
449                                         <td width='30%'>
450                                                 $Lang::tr{'Captive vouchervalid'}
451                                         </td>
452                                         <td width='70%'>
453                                                 <select name="SESSION_TIME">
454 END
455
456         foreach my $session_time (sort { $a <=> $b } keys %session_times) {
457                 print <<END;
458                                                         <option value="$session_time" $selected{'SESSION_TIME'}{$session_time}>
459                                                                 $session_times{$session_time}
460                                                         </option>
461 END
462         }
463
464         print <<END;
465                                                 </select>
466                                         </td>
467                                 </tr>
468                                 <tr>
469                                         <td>$Lang::tr{'remark'}</td>
470                                         <td>
471                                                 <input type='text' name='REMARK' size=40>
472                                         </td>
473                                 </tr>
474                                 <tr>
475                                         <td>$Lang::tr{'Captive generated coupon no'}</td>
476                                         <td>
477                                                 <select name="COUNT">
478                                                         <option value="1">1</option>
479                                                         <option value="2">2</option>
480                                                         <option value="3">3</option>
481                                                         <option value="4">4</option>
482                                                         <option value="5">5</option>
483                                                         <option value="6">6</option>
484                                                         <option value="7">7</option>
485                                                         <option value="8">8</option>
486                                                         <option value="9">9</option>
487                                                         <option value="10">10</option>
488                                                         <option value="20">20</option>
489                                                         <option value="50">50</option>
490                                                         <option value="100">100</option>
491                                                 </select>
492                                         </td>
493                                 </tr>
494                         </table>
495
496                         <div align="right">
497                                 <input type="submit" name="ACTION" value="$Lang::tr{'Captive generate coupons'}">
498                         </div>
499                 </form>
500 END
501
502         &Header::closebox();
503
504         # Show all coupons if exist
505         if (! -z $coupons) {
506                 &show_coupons();
507         }
508 }
509
510 sub show_coupons() {
511         &General::readhasharray($coupons, \%couponhash) if (-e $coupons);
512
513         #if there are already generated but unsused coupons, print a table
514         &Header::openbox('100%', 'left', $Lang::tr{'Captive issued coupons'});
515
516         print <<END;
517                 <table class='tbl' border='0'>
518                         <tr>
519                                 <th align='center' width='15%'>
520                                         $Lang::tr{'Captive coupon'}
521                                 </th>
522                                 <th align='center' width='15%'>$Lang::tr{'Captive expiry time'}</th>
523                                 <th align='center' width='65%'>$Lang::tr{'remark'}</th>
524                                 <th align='center' width='5%'>$Lang::tr{'delete'}</th>
525                         </tr>
526 END
527
528         foreach my $key (keys %couponhash) {
529                 my $expirytime = $Lang::tr{'Captive nolimit'};
530                 if ($couponhash{$key}[2] > 0) {
531                         $expirytime = &General::format_time($couponhash{$key}[2]);
532                 }
533
534                 if ($count++ % 2) {
535                         $col="bgcolor='$color{'color20'}'";
536                 } else {
537                         $col="bgcolor='$color{'color22'}'";
538                 }
539
540                 print <<END;
541                         <tr>
542                                 <td $col align="center">
543                                         <b>$couponhash{$key}[1]</b>
544                                 </td>
545                                 <td $col align="center">
546                                         $expirytime
547                                 </td>
548                                 <td $col align="center">
549                                         $couponhash{$key}[3]
550                                 </td>
551                                 <td $col align="center">
552                                         <form method='post'>
553                                                 <input type='image' src='/images/delete.gif' align='middle' alt='$Lang::tr{'delete'}' title='$Lang::tr{'delete'}' />
554                                                 <input type='hidden' name='ACTION' value='delete-coupon' />
555                                                 <input type='hidden' name='key' value='$couponhash{$key}[0]' />
556                                         </form>
557                                 </td>
558                         </tr>
559 END
560         }
561
562         print "</table>";
563
564         # Download PDF
565         print <<END;
566                 <div align="right">
567                         <form method="POST">
568                                 <input type="hidden" name="ACTION" value="export-coupons">
569                                 <input type="submit" value="$Lang::tr{'Captive export coupons'}">
570                         </form>
571                 </div>
572 END
573
574         &Header::closebox();
575 }
576
577 sub show_clients() {
578         # if there are active clients which use coupons show table
579         return if ( -z $clients || ! -f $clients );
580
581         my $count=0;
582         my $col;
583
584         &Header::openbox('100%', 'left', $Lang::tr{'Captive clients'});
585
586         print <<END;
587                 <table class='tbl' width='100%'>
588                         <tr>
589                                 <th align='center' width='15%'>$Lang::tr{'Captive coupon'}</th>
590                                 <th align='center' width='15%'>$Lang::tr{'Captive activated'}</th>
591                                 <th align='center' width='15%'>$Lang::tr{'Captive expiry time'}</th>
592                                 <th align='center' width='10%'>$Lang::tr{'Captive mac'}</th>
593                                 <th align='center' width='43%'>$Lang::tr{'remark'}</th>
594                                 <th align='center' width='5%'>$Lang::tr{'delete'}</th>
595                         </tr>
596 END
597
598         &General::readhasharray($clients, \%clientshash) if (-e $clients);
599         foreach my $key (keys %clientshash) {
600                 #calculate time from clientshash (starttime)
601                 my $starttime = sub{sprintf '%02d.%02d.%04d %02d:%02d', $_[3], $_[4]+1, $_[5]+1900, $_[2], $_[1]  }->(localtime($clientshash{$key}[2]));
602
603                 #calculate endtime from clientshash
604                 my $endtime;
605                 if ($clientshash{$key}[3] eq '0'){
606                         $endtime=$Lang::tr{'Captive nolimit'};
607                 } else {
608                         $endtime = sub{sprintf '%02d.%02d.%04d %02d:%02d', $_[3], $_[4]+1, $_[5]+1900, $_[2], $_[1]  }->(localtime($clientshash{$key}[2]+$clientshash{$key}[3]));
609                 }
610
611                 if ($count++ % 2) {
612                         $col="bgcolor='$color{'color20'}'";
613                 } else {
614                         $col="bgcolor='$color{'color22'}'";
615                 }
616
617                 my $coupon = ($clientshash{$key}[4] eq "LICENSE") ? $Lang::tr{'Captive terms short'} : $clientshash{$key}[4];
618
619                 print <<END;
620                         <tr>
621                                 <td $col align="center"><b>$coupon</b></td>
622                                 <td $col align="center">$starttime</td>
623                                 <td $col align="center">$endtime</td>
624                                 <td $col align="center">$clientshash{$key}[0]</td>
625                                 <td $col align="center">$clientshash{$key}[5]</td>
626                                 <td $col align="center">
627                                         <form method='post'>
628                                                 <input type='image' src='/images/delete.gif' align='middle' alt='$Lang::tr{'delete'}' title='$Lang::tr{'delete'}' />
629                                                 <input type='hidden' name='ACTION' value='delete-client' />
630                                                 <input type='hidden' name='key' value='$clientshash{$key}[0]' />
631                                         </form>
632                                 </td>
633                         </tr>
634 END
635         }
636
637         print "</table>";
638
639         &Header::closebox();
640 }
641
642 sub validremark
643 {
644         # Checks a hostname against RFC1035
645         my $remark = $_[0];
646         # Each part should be at least two characters in length
647         # but no more than 63 characters
648         if (length ($remark) < 1 || length ($remark) > 255) {
649                 return 0;}
650         # Only valid characters are a-z, A-Z, 0-9 and -
651         if ($remark !~ /^[a-zäöüA-ZÖÄÜ0-9-.:;\|_()\/\s]*$/) {
652                 return 0;}
653         # First character can only be a letter or a digit
654         if (substr ($remark, 0, 1) !~ /^[a-zäöüA-ZÖÄÜ0-9]*$/) {
655                 return 0;}
656         # Last character can only be a letter or a digit
657         if (substr ($remark, -1, 1) !~ /^[a-zöäüA-ZÖÄÜ0-9.:;_)]*$/) {
658                 return 0;}
659         return 1;
660 }
661
662 sub generate_pdf() {
663         my $pdf = PDF::API2->new();
664
665         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday, $isdst) = gmtime(time);
666         my $timestamp = sprintf("D:%04d%02d%02d%02d%02d%02d+00;00", $year+1900, $mon+1, $mday, $hour, $min, $sec);
667
668         $pdf->info(
669                 "Creator"      => $Lang::tr{'Captive portal'},
670                 "Title"        => $Lang::tr{'Captive portal coupons'},
671                 "CreationDate" => $timestamp,
672                 "ModDate"      => $timestamp,
673         );
674
675         # Set page size
676         $pdf->mediabox("A4");
677         $pdf->trimbox(28/mm, 27/mm, 182/mm, 270/mm);
678
679         # Set font
680         my $font = $pdf->ttfont("/usr/share/fonts/Ubuntu-R.ttf");
681
682         my $page_h_margin = 27/mm;
683         my $page_v_margin = 28/mm;
684
685         my $height = 68/mm;
686         my $width  = 91/mm;
687         my $margin =  2/mm;
688
689         # Tux Image
690         my $tux_image = $pdf->image_png("/srv/web/ipfire/html/captive/assets/ipfire.png");
691         my $logo_height = 12/mm;
692         my $logo_width  = 12/mm;
693
694         my @coupons = ();
695         my %coupon_expiry_times = ();
696
697         # Read coupons
698         &General::readhasharray($coupons, \%couponhash) if (-e $coupons);
699         foreach my $key (keys %couponhash) {
700                 $coupon_expiry_times{$couponhash{$key}[1]} = $couponhash{$key}[2];
701                 push @coupons, $couponhash{$key}[1];
702         }
703
704         while (@coupons) {
705                 # Make a new page
706                 my $page = $pdf->page();
707
708                 # Graphics
709                 $gfx = $page->gfx();
710
711                 # Headline font
712                 my $f_headline = $page->text();
713                 $f_headline->font($font, 20);
714
715                 # Subheadline font
716                 my $f_subheadline = $page->text();
717                 $f_subheadline->font($font, 14);
718
719                 # Coupon font
720                 my $f_coupon = $page->text();
721                 $f_coupon->font($font, 36);
722
723                 # Lifetime
724                 my $f_lifetime = $page->text();
725                 $f_lifetime->font($font, 14);
726
727                 # Watermark font
728                 my $f_watermark = $page->text();
729                 $f_watermark->fillcolor("#666666");
730                 $f_watermark->font($font, 10);
731
732                 my $i = 0;
733                 while (@coupons && $i < 8) {
734                         my $coupon = shift @coupons;
735
736                         # Box corners
737                         my $x = ($page_v_margin / 2) + (($i % 2) ? $width : 0);
738                         my $y = ($page_h_margin / 2) + (int($i / 2) * $height);
739
740                         # Weidth and height of the box
741                         my $w = $width - $margin;
742                         my $h = $height - $margin;
743
744                         # Center
745                         my $cx = $x + ($w / 2);
746                         my $cy = $y + ($h / 2);
747
748                         # Draw border box
749                         $gfx->strokecolor("#333333");
750                         $gfx->linedash(1/mm, 1/mm);
751                         $gfx->rect($x, $y, $w, $h);
752                         $gfx->stroke();
753                         $gfx->endpath();
754
755                         # Headline
756                         $f_headline->translate($cx, ($y + $h - $cy) / 1.7 + $cy);
757                         $f_subheadline->translate($cx, ($y + $h - $cy) / 2.4 + $cy);
758
759                         if ($settings{'TITLE'}) {
760                                 $f_headline->text_center(decode("utf8", $settings{'TITLE'}));
761                                 $f_subheadline->text_center(decode("utf8", $Lang::tr{'Captive WiFi coupon'}));
762                         } else {
763                                 $f_headline->text_center(decode("utf8", $Lang::tr{'Captive WiFi coupon'}));
764                         }
765
766                         # Coupon
767                         $f_coupon->translate($cx, $cy);
768                         $f_coupon->text_center(decode("utf8", $coupon));
769
770                         # Show lifetime
771                         my $expiry_time = $coupon_expiry_times{$coupon};
772                         $f_lifetime->translate($cx, $cy - ($y + $h - $cy) / 4);
773                         if ($expiry_time > 0) {
774                                 my $lifetime = &General::format_time($expiry_time);
775                                 $f_lifetime->text_center(decode("utf8", $Lang::tr{'Captive valid for'} . " " . $lifetime));
776                         } else {
777                                 $f_lifetime->text_center(decode("utf8", $Lang::tr{'Captive nolimit'}));
778                         }
779
780                         # Add watermark
781                         $gfx->image($tux_image, $x + $w - $logo_width - $margin, $y + $margin, $logo_width, $logo_height);
782                         $f_watermark->translate($x + $w - ($margin * 2) - $logo_width, $y + ($logo_height / 2));
783                         $f_watermark->text_right("Powered by IPFire");
784
785                         $i++;
786                 }
787         }
788
789         # Write out the PDF document
790         return $pdf->stringify();
791 }
792
793 &Header::closebigbox();
794 &Header::closepage();