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                 if ($cgiparams{'COUPON'}) {
  82                         # Convert coupon input to uppercase
  83                         $cgiparams{'COUPON'} = uc $cgiparams{'COUPON'};
  84
  85                         # Walk through all valid coupons and find the right one
  86                         my $found = 0;
  87                         foreach my $coupon (keys %couponhash) {
  88                                 if ($couponhash{$coupon}[1] eq $cgiparams{'COUPON'}) {
  89                                         $found = 1;
  90
  91                                         # Copy expiry time
  92                                         $clientshash{$key}[3] = $couponhash{$coupon}[2];
  93
  94                                         # Save coupon code
  95                                         $clientshash{$key}[4] = $cgiparams{'COUPON'};
  96
  97                                         # Copy coupon remark
  98                                         $clientshash{$key}[5] = $couponhash{$coupon}[3];
  99
 100                                         # Delete used coupon
 101                                         delete $couponhash{$coupon};
 102                                         &General::writehasharray($coupons, \%couponhash);
 103
 104                                         last;
 105                                 }
 106                         }
 107
 108                         if ($found == 1) {
 109                                 &General::log("Captive", "Internet access granted via coupon ($clientshash{$key}[4]) for $ip_address until $clientshash{$key}[3]");
 110                         } else {
 111                                 $errormessage = $Lang::tr{"Captive invalid coupon"};
 112                         }
 113
 114                 # No coupon given
 115                 } else {
 116                         $errormessage = $Lang::tr{"Captive please enter a coupon code"};
 117                 }
 118
 119         # License
 120         } else {
 121                 # Copy session expiry time
 122                 $clientshash{$key}[3] = $settings{'SESSION_TIME'} || "0";
 123
 124                 # No coupon code
 125                 $clientshash{$key}[4] = "TERMS";
 126
 127                 &General::log("Captive", "Internet access granted via license agreement for $ip_address until $clientshash{$key}[3]");
 128         }
 129
 130         # If no errors were found, save configruation and reload
 131         if (!$errormessage) {
 132                 &General::writehasharray("$clients", \%clientshash);
 133
 134                 system("/usr/local/bin/captivectrl");
 135
 136                 # Redirect client to the original URL
 137                 print "Status: 302 Moved Temporarily\n";
 138                 print "Location: $url\n";
 139                 print "Connection: close\n\n";
 140                 exit 0;
 141         }
 142 }
 143
 144 my $tmpl = HTML::Template->new(
 145         filename => "/srv/web/ipfire/html/captive/template.html",
 146         die_on_bad_params => 0
 147 );
 148
 149 $tmpl->param(REDIRECT_URL => $url);
 150
 151 # Coupon
 152 if ($settings{'AUTH'} eq "COUPON") {
 153         $tmpl->param(COUPON => 1);
 154         $tmpl->param(L_HEADING => $Lang::tr{'Captive coupon'});
 155 } else {
 156         $tmpl->param(L_HEADING => $Lang::tr{'Captive terms'});
 157 }
 158
 159 $tmpl->param(TITLE => $settings{'TITLE'});
 160 $tmpl->param(COLOR => $settings{'COLOR'});
 161 $tmpl->param(ERROR => $errormessage);
 162
 163 $tmpl->param(TERMS => &getterms());
 164
 165 # Some translated strings
 166 $tmpl->param(L_ACTIVATE        => $Lang::tr{'Captive ACTIVATE'});
 167 $tmpl->param(L_GAIN_ACCESS     => $Lang::tr{'Captive GAIN ACCESS'});
 168 $tmpl->param(L_AGREE_TERMS     => $Lang::tr{'Captive agree tac'});
 169
 170 # Print header
 171 print "Pragma: no-cache\n";
 172 print "Cache-control: no-cache\n";
 173 print "Connection: close\n";
 174 print "Content-type: text/html\n\n";
 175
 176 # Print rendered template
 177 print $tmpl->output();
 178
 179 sub getcgihash {
 180         my ($hash, $params) = @_;
 181         my $cgi = CGI->new ();
 182         $hash->{'__CGI__'} = $cgi;
 183         return if ($ENV{'REQUEST_METHOD'} ne 'POST');
 184         if (!$params->{'wantfile'}) {
 185                 $CGI::DISABLE_UPLOADS = 1;
 186                 $CGI::POST_MAX        = 1024 * 1024;
 187         } else {
 188                 $CGI::POST_MAX = 10 * 1024 * 1024;
 189         }
 190         $cgi->referer() =~ m/^http?\:\/\/([^\/]+)/;
 191         my $referer = $1;
 192         $cgi->url() =~ m/^http?\:\/\/([^\/]+)/;
 193         my $servername = $1;
 194         return if ($referer ne $servername);
 195
 196         ### Modified for getting multi-vars, split by |
 197         my %temp = $cgi->Vars();
 198         foreach my $key (keys %temp) {
 199                 $hash->{$key} = $temp{$key};
 200                 $hash->{$key} =~ s/\0/|/g;
 201                 $hash->{$key} =~ s/^\s*(.*?)\s*$/$1/;
 202         }
 203
 204         if (($params->{'wantfile'})&&($params->{'filevar'})) {
 205                 $hash->{$params->{'filevar'}} = $cgi->upload
 206                                                 ($params->{'filevar'});
 207         }
 208         return;
 209 }
 210
 211 sub getterms() {
 212         my @terms = ();
 213
 214         open(my $handle, "<:utf8", "/var/ipfire/captive/terms.txt");
 215         while(<$handle>) {
 216                 $_ = HTML::Entities::decode_entities($_);
 217                 push(@terms, $_);
 218         }
 219         close($handle);
 220
 221         my $terms = join("\n", @terms);
 222
 223         # Format paragraphs
 224         $terms =~ s/\n\n/<\/p>\n<p>/g;
 225
 226         return $terms;
 227 }