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 #Set Variables
  36 my %voucherhash=();
  37 my %clientshash=();
  38 my %cgiparams=();
  39 my %settings=();
  40 my $voucherout="${General::swroot}/captive/voucher_out";
  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 ($settings{"AUTH"} eq "VOUCHER") {
  79                 &General::readhasharray("$voucherout", \%voucherhash);
  80
  81                 # Convert voucher input to uppercase
  82                 $cgiparams{'VOUCHER'} = uc $cgiparams{'VOUCHER'};
  83
  84                 # Walk through all valid vouchers and find the right one
  85                 my $found = 0;
  86                 foreach my $voucher (keys %voucherhash) {
  87                         if ($voucherhash{$voucher}[1] eq $cgiparams{'VOUCHER'}) {
  88                                 $found = 1;
  89
  90                                 # Copy expiry time
  91                                 $clientshash{$key}[3] = $voucherhash{$voucher}[2];
  92
  93                                 # Save voucher code
  94                                 $clientshash{$key}[4] = $cgiparams{'VOUCHER'};
  95
  96                                 # Copy voucher remark
  97                                 $clientshash{$key}[5] = $voucherhash{$voucher}[3];
  98
  99                                 # Delete used voucher
 100                                 delete $voucherhash{$voucher};
 101                                 &General::writehasharray("$voucherout", \%voucherhash);
 102
 103                                 last;
 104                         }
 105                 }
 106
 107                 if ($found == 1) {
 108                         &General::log("Captive", "Internet access granted via voucher ($clientshash{$key}[4]) for $ip_address until $clientshash{$key}[3]");
 109                 } else {
 110                         $errormessage = $Lang::tr{"Captive invalid_voucher"};
 111                 }
 112
 113         # License
 114         } else {
 115                 # Copy expiry time
 116                 $clientshash{$key}[3] = $settings{'EXPIRE'};
 117
 118                 # No voucher 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 "VOUCHER") {
 147         $tmpl->param(VOUCHER  => 1);
 148 }
 149
 150 $tmpl->param(TITLE => $settings{'TITLE'});
 151 $tmpl->param(ERROR => $errormessage);
 152
 153 $tmpl->param(TAC => &gettac());
 154
 155 # Some translated strings
 156 $tmpl->param(L_ACTIVATE        => $Lang::tr{'Captive ACTIVATE'});
 157 $tmpl->param(L_GAIN_ACCESS     => $Lang::tr{'Captive GAIN ACCESS'});
 158 $tmpl->param(L_HEADING_TAC     => $Lang::tr{'Captive heading tac'});
 159 $tmpl->param(L_HEADING_VOUCHER => $Lang::tr{'Captive heading voucher'});
 160 $tmpl->param(L_AGREE_TAC       => $Lang::tr{'Captive agree tac'});
 161
 162 # Print header
 163 print "Pragma: no-cache\n";
 164 print "Cache-control: no-cache\n";
 165 print "Connection: close\n";
 166 print "Content-type: text/html\n\n";
 167
 168 # Print rendered template
 169 print $tmpl->output();
 170
 171 sub getcgihash {
 172         my ($hash, $params) = @_;
 173         my $cgi = CGI->new ();
 174         $hash->{'__CGI__'} = $cgi;
 175         return if ($ENV{'REQUEST_METHOD'} ne 'POST');
 176         if (!$params->{'wantfile'}) {
 177                 $CGI::DISABLE_UPLOADS = 1;
 178                 $CGI::POST_MAX        = 1024 * 1024;
 179         } else {
 180                 $CGI::POST_MAX = 10 * 1024 * 1024;
 181         }
 182         $cgi->referer() =~ m/^http?\:\/\/([^\/]+)/;
 183         my $referer = $1;
 184         $cgi->url() =~ m/^http?\:\/\/([^\/]+)/;
 185         my $servername = $1;
 186         return if ($referer ne $servername);
 187
 188         ### Modified for getting multi-vars, split by |
 189         my %temp = $cgi->Vars();
 190         foreach my $key (keys %temp) {
 191                 $hash->{$key} = $temp{$key};
 192                 $hash->{$key} =~ s/\0/|/g;
 193                 $hash->{$key} =~ s/^\s*(.*?)\s*$/$1/;
 194         }
 195
 196         if (($params->{'wantfile'})&&($params->{'filevar'})) {
 197                 $hash->{$params->{'filevar'}} = $cgi->upload
 198                                                 ($params->{'filevar'});
 199         }
 200         return;
 201 }
 202
 203 sub gettac() {
 204         my @tac = ();
 205
 206         open(my $handle, "<:utf8", "/var/ipfire/captive/agb.txt" ) or die("$!");
 207         while(<$handle>) {
 208                 $_ = HTML::Entities::decode_entities($_);
 209                 push(@tac, $_);
 210         }
 211         close($handle);
 212
 213         my $tac = join("\n", @tac);
 214
 215         # Format paragraphs
 216         $tac =~ s/\n\n/<\/p>\n<p>/g;
 217
 218         return $tac;
 219 }