html/cgi-bin/captive/index.cgi

   1 #!/usr/bin/perl
   2 ###############################################################################
   3 #                                                                             #
   4 # IPFire.org - A linux based firewall                                         #
   5 # Copyright (C) 2016  Alexander Marx 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 CGI ':standard';
  24 use URI::Escape;
  25 use HTML::Entities();
  26 use HTML::Template;
  27
  28 # enable only the following on debugging purpose
  29 #use warnings;
  30 #use CGI::Carp 'fatalsToBrowser';
  31
  32 require '/var/ipfire/general-functions.pl';
  33 require "${General::swroot}/lang.pl";
  34
  35 my $coupons = "${General::swroot}/captive/coupons";
  36 my %couponhash = ();
  37
  38 my %clientshash=();
  39 my %cgiparams=();
  40 my %settings=();
  41 my $clients="${General::swroot}/captive/clients";
  42 my $settingsfile="${General::swroot}/captive/settings";
  43 my $errormessage;
  44 my $url=param('redirect');
  45
  46 #Create /var/ipfire/captive/clients if not exist
  47 unless (-f $clients){ system("touch $clients"); }
  48
  49 #Get GUI variables
  50 &getcgihash(\%cgiparams);
  51
  52 #Read settings
  53 &General::readhash("$settingsfile", \%settings) if(-f $settingsfile);
  54
  55 # Actions
  56 if ($cgiparams{'ACTION'} eq "SUBMIT") {
  57         # Get client IP address
  58         my $ip_address = $ENV{X_FORWARDED_FOR} || $ENV{REMOTE_ADDR};
  59
  60         # Retrieve the MAC address from the ARP table
  61         my $mac_address = &Network::get_hardware_address($ip_address);
  62
  63         &General::readhasharray("$clients", \%clientshash);
  64         my $key = &General::findhasharraykey(\%clientshash);
  65
  66         # Create a new client line
  67         foreach my $i (0 .. 5) { $clientshash{$key}[$i] = ""; }
  68
  69         # MAC address of the client
  70         $clientshash{$key}[0] = $mac_address;
  71
  72         # IP address of the client
  73         $clientshash{$key}[1] = $ip_address;
  74
  75         # Current time
  76         $clientshash{$key}[2] = time();
  77
  78         if ($settings{"AUTH"} eq "COUPON") {
  79                 &General::readhasharray($coupons, \%couponhash);
  80
  81                 # Convert coupon input to uppercase
  82                 $cgiparams{'COUPON'} = uc $cgiparams{'COUPON'};
  83
  84                 # Walk through all valid coupons and find the right one
  85                 my $found = 0;
  86                 foreach my $coupon (keys %couponhash) {
  87                         if ($couponhash{$coupon}[1] eq $cgiparams{'COUPON'}) {
  88                                 $found = 1;
  89
  90                                 # Copy expiry time
  91                                 $clientshash{$key}[3] = $couponhash{$coupon}[2];
  92
  93                                 # Save coupon code
  94                                 $clientshash{$key}[4] = $cgiparams{'COUPON'};
  95
  96                                 # Copy coupon remark
  97                                 $clientshash{$key}[5] = $couponhash{$coupon}[3];
  98
  99                                 # Delete used coupon
 100                                 delete $couponhash{$coupon};
 101                                 &General::writehasharray($coupons, \%couponhash);
 102
 103                                 last;
 104                         }
 105                 }
 106
 107                 if ($found == 1) {
 108                         &General::log("Captive", "Internet access granted via coupon ($clientshash{$key}[4]) for $ip_address until $clientshash{$key}[3]");
 109                 } else {
 110                         $errormessage = $Lang::tr{"Captive invalid coupon"};
 111                 }
 112
 113         # License
 114         } else {
 115                 # Copy expiry time
 116                 $clientshash{$key}[3] = $settings{'EXPIRE'};
 117
 118                 # No coupon code
 119                 $clientshash{$key}[4] = "LICENSE";
 120
 121                 &General::log("Captive", "Internet access granted via license agreement for $ip_address until $clientshash{$key}[3]");
 122         }
 123
 124         # If no errors were found, save configruation and reload
 125         if (!$errormessage) {
 126                 &General::writehasharray("$clients", \%clientshash);
 127
 128                 system("/usr/local/bin/captivectrl");
 129
 130                 # Redirect client to the original URL
 131                 print "Status: 302 Moved Temporarily\n";
 132                 print "Location: $url\n";
 133                 print "Connection: close\n\n";
 134                 exit 0;
 135         }
 136 }
 137
 138 my $tmpl = HTML::Template->new(
 139         filename => "/srv/web/ipfire/html/captive/template.html",
 140         die_on_bad_params => 0
 141 );
 142
 143 $tmpl->param(REDIRECT_URL => $url);
 144
 145 # Voucher
 146 if ($settings{'AUTH'} eq "COUPON") {
 147         $tmpl->param(COUPON => 1);
 148 }
 149
 150 $tmpl->param(TITLE => $settings{'TITLE'});
 151 $tmpl->param(COLOR => $settings{'COLOR'});
 152 $tmpl->param(ERROR => $errormessage);
 153
 154 $tmpl->param(TERMS => &getterms());
 155
 156 # Some translated strings
 157 $tmpl->param(L_ACTIVATE        => $Lang::tr{'Captive ACTIVATE'});
 158 $tmpl->param(L_GAIN_ACCESS     => $Lang::tr{'Captive GAIN ACCESS'});
 159 $tmpl->param(L_HEADING_COUPON  => $Lang::tr{'Captive coupon'});
 160 $tmpl->param(L_HEADING_TERMS   => $Lang::tr{'Captive terms'});
 161 $tmpl->param(L_AGREE_TAC       => $Lang::tr{'Captive agree tac'});
 162
 163 # Print header
 164 print "Pragma: no-cache\n";
 165 print "Cache-control: no-cache\n";
 166 print "Connection: close\n";
 167 print "Content-type: text/html\n\n";
 168
 169 # Print rendered template
 170 print $tmpl->output();
 171
 172 sub getcgihash {
 173         my ($hash, $params) = @_;
 174         my $cgi = CGI->new ();
 175         $hash->{'__CGI__'} = $cgi;
 176         return if ($ENV{'REQUEST_METHOD'} ne 'POST');
 177         if (!$params->{'wantfile'}) {
 178                 $CGI::DISABLE_UPLOADS = 1;
 179                 $CGI::POST_MAX        = 1024 * 1024;
 180         } else {
 181                 $CGI::POST_MAX = 10 * 1024 * 1024;
 182         }
 183         $cgi->referer() =~ m/^http?\:\/\/([^\/]+)/;
 184         my $referer = $1;
 185         $cgi->url() =~ m/^http?\:\/\/([^\/]+)/;
 186         my $servername = $1;
 187         return if ($referer ne $servername);
 188
 189         ### Modified for getting multi-vars, split by |
 190         my %temp = $cgi->Vars();
 191         foreach my $key (keys %temp) {
 192                 $hash->{$key} = $temp{$key};
 193                 $hash->{$key} =~ s/\0/|/g;
 194                 $hash->{$key} =~ s/^\s*(.*?)\s*$/$1/;
 195         }
 196
 197         if (($params->{'wantfile'})&&($params->{'filevar'})) {
 198                 $hash->{$params->{'filevar'}} = $cgi->upload
 199                                                 ($params->{'filevar'});
 200         }
 201         return;
 202 }
 203
 204 sub getterms() {
 205         my @terms = ();
 206
 207         open(my $handle, "<:utf8", "/var/ipfire/captive/terms.txt");
 208         while(<$handle>) {
 209                 $_ = HTML::Entities::decode_entities($_);
 210                 push(@terms, $_);
 211         }
 212         close($handle);
 213
 214         my $terms = join("\n", @terms);
 215
 216         # Format paragraphs
 217         $terms =~ s/\n\n/<\/p>\n<p>/g;
 218
 219         return $terms;
 220 }