#!/usr/bin/perl
###############################################################################
#                                                                             #
# IPFire.org - A linux based firewall                                         #
# Copyright (C) 2007  Michael Tremer & Christian Schmidt                      #
#                                                                             #
# This program is free software: you can redistribute it and/or modify        #
# it under the terms of the GNU General Public License as published by        #
# the Free Software Foundation, either version 3 of the License, or           #
# (at your option) any later version.                                         #
#                                                                             #
# This program is distributed in the hope that it will be useful,             #
# but WITHOUT ANY WARRANTY; without even the implied warranty of              #
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the               #
# GNU General Public License for more details.                                #
#                                                                             #
# You should have received a copy of the GNU General Public License           #
# along with this program.  If not, see <http://www.gnu.org/licenses/>.       #
#                                                                             #
# Based on Steffen Schoch (sschoch@users.sourceforge.net)                     #
#                                                                             #
###############################################################################

use strict;
use IPC::Open2;
use IO::Handle;
require '/var/ipfire/general-functions.pl';

my %proxysettings=();
&General::readhash("${General::swroot}/proxy/settings", \%proxysettings);

# define here your redirectors (use a comma sperated list)
my @redirectors = "";
if ( $proxysettings{'ENABLE_FILTER'} eq 'on' && -e '/usr/bin/squidGuard' ){push(@redirectors,"/usr/bin/squidGuard"); }
if ( $proxysettings{'ENABLE_CLAMAV'} eq 'on' && -e '/usr/bin/squidclamav' ){ push(@redirectors,"/usr/bin/squidclamav"); }
if ( $proxysettings{'ENABLE_UPDXLRATOR'} eq 'on' && -e '/usr/sbin/updxlrator' ) { push(@redirectors,"/usr/sbin/updxlrator"); }

#my $redirectors = [ '/usr/bin/squidclamav', '/usr/bin/squidGuard', '/usr/sbin/updxlrator' ];

# Attention: keep in mind that the order of your redirectors is important.
# It doesn't make sense to scan for viruses on pages you restrict access to...
# So place first your tools which restrict access, then the tools which do the
# content filtering!

#print "Anzahl ".$#redirectors."\n";

##### no need to change anything below this line #####

# init
$| = 1;
STDOUT->autoflush(1);
my $line;
my $return;
my $i;

# open progamms
my $pidlist = [];
my $rlist = [];
my $wlist = [];
for($i = 1; $i <= $#redirectors; $i++) {
			  #print "i=".$i." redirector ".$redirectors[$i]."\n";
        $pidlist->[$i] = open2($rlist->[$i], $wlist->[$i], $redirectors[$i] );
}

# wait for data...
while($line = <>) {
        for($i = 1; $i <= $#redirectors; $i++) {
                $wlist->[$i]->print($line);
                $return = $rlist->[$i]->getline;
                last if($return ne "\n" and $return ne $line);
								# break if redirector changes data
        }
        print $return;
}
exit 0;