mirror of
https://github.com/vincentmli/bpfire.git
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483 lines
12 KiB
Perl
483 lines
12 KiB
Perl
#!/usr/bin/perl
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###############################################################################
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# #
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# IPFire.org - A linux based firewall #
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# Copyright (C) 2007-2012 IPFire Team <info@ipfire.org> #
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# #
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# This program is free software: you can redistribute it and/or modify #
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# it under the terms of the GNU General Public License as published by #
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# the Free Software Foundation, either version 3 of the License, or #
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# (at your option) any later version. #
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# #
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# This program is distributed in the hope that it will be useful, #
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# but WITHOUT ANY WARRANTY; without even the implied warranty of #
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the #
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# GNU General Public License for more details. #
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# #
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# You should have received a copy of the GNU General Public License #
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# along with this program. If not, see <http://www.gnu.org/licenses/>. #
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# #
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###############################################################################
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use strict;
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use Net::IPv4Addr qw( :all );
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use Switch;
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# enable only the following on debugging purpose
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#use warnings;
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#use CGI::Carp 'fatalsToBrowser';
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require '/var/ipfire/general-functions.pl';
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require "${General::swroot}/lang.pl";
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require "${General::swroot}/header.pl";
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my $colour_multicast = "#A0A0A0";
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&Header::showhttpheaders();
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my @network=();
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my @masklen=();
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my @colour=();
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my %netsettings=();
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&General::readhash("${General::swroot}/ethernet/settings", \%netsettings);
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#workaround to suppress a warning when a variable is used only once
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my @dummy = ( ${Header::table1colour} );
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undef (@dummy);
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# Read the connection tracking table.
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open(CONNTRACK, "/usr/local/bin/getconntracktable | sort -k 5,5 --numeric-sort --reverse |") or die "Unable to read conntrack table";
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my @conntrack = <CONNTRACK>;
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close(CONNTRACK);
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# Collect data for the @network array.
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# Add Firewall Localhost 127.0.0.1
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push(@network, '127.0.0.1');
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push(@masklen, '255.255.255.255');
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push(@colour, ${Header::colourfw});
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if (open(IP, "${General::swroot}/red/local-ipaddress")) {
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my $redip = <IP>;
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close(IP);
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chomp $redip;
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push(@network, $redip);
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push(@masklen, '255.255.255.255');
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push(@colour, ${Header::colourfw});
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}
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# Add STATIC RED aliases
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if ($netsettings{'RED_DEV'}) {
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my $aliasfile = "${General::swroot}/ethernet/aliases";
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open(ALIASES, $aliasfile) or die 'Unable to open aliases file.';
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my @aliases = <ALIASES>;
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close(ALIASES);
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# We have a RED eth iface
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if ($netsettings{'RED_TYPE'} eq 'STATIC') {
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# We have a STATIC RED eth iface
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foreach my $line (@aliases) {
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chomp($line);
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my @temp = split(/\,/,$line);
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if ($temp[0]) {
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push(@network, $temp[0]);
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push(@masklen, $netsettings{'RED_NETMASK'} );
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push(@colour, ${Header::colourfw} );
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}
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}
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}
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}
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# Add Green Firewall Interface
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push(@network, $netsettings{'GREEN_ADDRESS'});
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push(@masklen, "255.255.255.255" );
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push(@colour, ${Header::colourfw} );
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# Add Green Network to Array
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push(@network, $netsettings{'GREEN_NETADDRESS'});
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push(@masklen, $netsettings{'GREEN_NETMASK'} );
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push(@colour, ${Header::colourgreen} );
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# Add Green Routes to Array
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my @routes = `/sbin/route -n | /bin/grep $netsettings{'GREEN_DEV'}`;
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foreach my $route (@routes) {
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chomp($route);
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my @temp = split(/[\t ]+/, $route);
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push(@network, $temp[0]);
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push(@masklen, $temp[2]);
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push(@colour, ${Header::colourgreen} );
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}
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# Add Blue Firewall Interface
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push(@network, $netsettings{'BLUE_ADDRESS'});
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push(@masklen, "255.255.255.255" );
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push(@colour, ${Header::colourfw} );
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# Add Blue Network
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if ($netsettings{'BLUE_DEV'}) {
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push(@network, $netsettings{'BLUE_NETADDRESS'});
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push(@masklen, $netsettings{'BLUE_NETMASK'} );
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push(@colour, ${Header::colourblue} );
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# Add Blue Routes to Array
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@routes = `/sbin/route -n | /bin/grep $netsettings{'BLUE_DEV'}`;
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foreach my $route (@routes) {
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chomp($route);
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my @temp = split(/[\t ]+/, $route);
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push(@network, $temp[0]);
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push(@masklen, $temp[2]);
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push(@colour, ${Header::colourblue} );
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}
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}
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# Add Orange Network
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if ($netsettings{'ORANGE_DEV'}) {
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push(@network, $netsettings{'ORANGE_NETADDRESS'});
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push(@masklen, $netsettings{'ORANGE_NETMASK'} );
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push(@colour, ${Header::colourorange} );
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# Add Orange Routes to Array
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@routes = `/sbin/route -n | /bin/grep $netsettings{'ORANGE_DEV'}`;
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foreach my $route (@routes) {
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chomp($route);
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my @temp = split(/[\t ]+/, $route);
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push(@network, $temp[0]);
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push(@masklen, $temp[2]);
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push(@colour, ${Header::colourorange} );
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}
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}
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# Highlight multicast connections.
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push(@network, "224.0.0.0");
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push(@masklen, "239.0.0.0");
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push(@colour, $colour_multicast);
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# Add OpenVPN net and RED/BLUE/ORANGE entry (when appropriate)
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if (-e "${General::swroot}/ovpn/settings") {
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my %ovpnsettings = ();
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&General::readhash("${General::swroot}/ovpn/settings", \%ovpnsettings);
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my @tempovpnsubnet = split("\/",$ovpnsettings{'DOVPN_SUBNET'});
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# add OpenVPN net
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push(@network, $tempovpnsubnet[0]);
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push(@masklen, $tempovpnsubnet[1]);
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push(@colour, ${Header::colourovpn} );
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# add BLUE:port / proto
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if (($ovpnsettings{'ENABLED_BLUE'} eq 'on') && $netsettings{'BLUE_DEV'}) {
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push(@network, $netsettings{'BLUE_ADDRESS'} );
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push(@masklen, '255.255.255.255' );
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push(@colour, ${Header::colourovpn});
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}
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# add ORANGE:port / proto
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if (($ovpnsettings{'ENABLED_ORANGE'} eq 'on') && $netsettings{'ORANGE_DEV'}) {
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push(@network, $netsettings{'ORANGE_ADDRESS'} );
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push(@masklen, '255.255.255.255' );
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push(@colour, ${Header::colourovpn} );
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}
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}
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open(IPSEC, "${General::swroot}/vpn/config");
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my @ipsec = <IPSEC>;
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close(IPSEC);
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foreach my $line (@ipsec) {
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my @vpn = split(',', $line);
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my ($network, $mask) = split("/", $vpn[12]);
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if (!&General::validip($mask)) {
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$mask = ipv4_cidr2msk($mask);
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}
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push(@network, $network);
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push(@masklen, $mask);
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push(@colour, ${Header::colourvpn});
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}
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if (-e "${General::swroot}/ovpn/n2nconf") {
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open(OVPNN2N, "${General::swroot}/ovpn/ovpnconfig");
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my @ovpnn2n = <OVPNN2N>;
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close(OVPNN2N);
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foreach my $line (@ovpnn2n) {
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my @ovpn = split(',', $line);
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next if ($ovpn[4] ne 'net');
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my ($network, $mask) = split("/", $ovpn[12]);
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if (!&General::validip($mask)) {
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$mask = ipv4_cidr2msk($mask);
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}
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push(@network, $network);
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push(@masklen, $mask);
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push(@colour, ${Header::colourovpn});
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}
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}
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# Show the page.
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&Header::openpage($Lang::tr{'connections'}, 1, '');
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&Header::openbigbox('100%', 'left');
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&Header::openbox('100%', 'left', $Lang::tr{'connection tracking'});
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# Print legend.
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print <<END;
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<table width='100%'>
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<tr>
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<td align='center'>
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<b>$Lang::tr{'legend'} : </b>
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</td>
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<td align='center' bgcolor='${Header::colourgreen}'>
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<b><font color='#FFFFFF'>$Lang::tr{'lan'}</font></b>
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</td>
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<td align='center' bgcolor='${Header::colourred}'>
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<b><font color='#FFFFFF'>$Lang::tr{'internet'}</font></b>
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</td>
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<td align='center' bgcolor='${Header::colourorange}'>
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<b><font color='#FFFFFF'>$Lang::tr{'dmz'}</font></b>
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</td>
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<td align='center' bgcolor='${Header::colourblue}'>
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<b><font color='#FFFFFF'>$Lang::tr{'wireless'}</font></b>
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</td>
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<td align='center' bgcolor='${Header::colourfw}'>
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<b><font color='#FFFFFF'>IPFire</font></b>
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</td>
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<td align='center' bgcolor='${Header::colourvpn}'>
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<b><font color='#FFFFFF'>$Lang::tr{'vpn'}</font></b>
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</td>
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<td align='center' bgcolor='${Header::colourovpn}'>
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<b><font color='#FFFFFF'>$Lang::tr{'OpenVPN'}</font></b>
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</td>
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<td align='center' bgcolor='$colour_multicast'>
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<b><font color='#FFFFFF'>Multicast</font></b>
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</td>
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</tr>
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</table>
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<br>
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END
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# Print table header.
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print <<END;
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<table width='100%'>
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<tr>
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<th align='center'>
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$Lang::tr{'protocol'}
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</th>
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<th align='center'>
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$Lang::tr{'source ip and port'}
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</th>
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<th> </th>
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<th align='center'>
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$Lang::tr{'dest ip and port'}
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</th>
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<th> </th>
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<th align='center'>
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$Lang::tr{'download'} /
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<br>$Lang::tr{'upload'}
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</th>
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<th align='center'>
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$Lang::tr{'connection'}<br>$Lang::tr{'status'}
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</th>
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<th align='center'>
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$Lang::tr{'expires'}<br>($Lang::tr{'seconds'})
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</th>
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</tr>
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END
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foreach my $line (@conntrack) {
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my @conn = split(' ', $line);
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# The first bit is the l3 protocol.
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my $l3proto = $conn[0];
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# Skip everything that is not IPv4.
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if ($l3proto ne 'ipv4') {
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next;
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}
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# L4 protocol (tcp, udp, ...).
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my $l4proto = $conn[2];
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# Translate unknown protocols.
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if ($l4proto eq 'unknown') {
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my $l4protonum = $conn[3];
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if ($l4protonum eq '2') {
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$l4proto = 'IGMP';
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} elsif ($l4protonum eq '4') {
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$l4proto = 'IPv4 Encap';
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} elsif ($l4protonum eq '33') {
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$l4proto = 'DCCP';
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} elsif ($l4protonum eq '41') {
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$l4proto = 'IPv6 Encap';
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} elsif ($l4protonum eq '50') {
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$l4proto = 'ESP';
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} elsif ($l4protonum eq '51') {
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$l4proto = 'AH';
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} elsif ($l4protonum eq '132') {
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$l4proto = 'SCTP';
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} else {
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$l4proto = $l4protonum;
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}
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} else {
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$l4proto = uc($l4proto);
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}
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# Source and destination.
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my $sip;
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my $dip;
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my $sport;
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my $dport;
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my @packets;
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my @bytes;
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my $ttl = $conn[4];
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my $state;
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if ($l4proto eq 'TCP') {
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$state = $conn[5];
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}
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# Kick out everything that is not IPv4.
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foreach my $item (@conn) {
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my ($key, $val) = split('=', $item);
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switch ($key) {
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case "src" {
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$sip = $val;
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}
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case "dst" {
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$dip = $val;
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}
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case "sport" {
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$sport = $val;
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}
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case "dport" {
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$dport = $val;
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}
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case "packets" {
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push(@packets, $val);
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}
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case "bytes" {
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push(@bytes, $val);
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}
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}
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}
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my $sip_colour = ipcolour($sip);
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my $dip_colour = ipcolour($dip);
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my $sserv = '';
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if ($sport < 1024) {
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$sserv = uc(getservbyport($sport, lc($l4proto)));
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if ($sserv ne '') {
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$sserv = " ($sserv)";
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}
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}
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my $dserv = '';
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if ($dport < 1024) {
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$dserv = uc(getservbyport($dport, lc($l4proto)));
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if ($dserv ne '') {
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$dserv = " ($dserv)";
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}
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}
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my $bytes_in = format_bytes($bytes[0]);
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my $bytes_out = format_bytes($bytes[1]);
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# Format TTL
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$ttl = format_time($ttl);
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print <<END;
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<tr>
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<td align='center'>$l4proto</td>
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<td align='center' bgcolor='$sip_colour'>
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<a href='/cgi-bin/ipinfo.cgi?ip=$sip'>
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<font color='#FFFFFF'>$sip</font>
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</a>
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</td>
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<td align='center' bgcolor='$sip_colour'>
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<a href='http://isc.sans.org/port_details.php?port=$sport' target='top'>
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<font color='#FFFFFF'>$sport$sserv</font>
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</a>
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</td>
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<td align='center' bgcolor='$dip_colour'>
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<a href='/cgi-bin/ipinfo.cgi?ip=$dip'>
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<font color='#FFFFFF'>$dip</font>
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</a>
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</td>
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<td align='center' bgcolor='$dip_colour'>
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<a href='http://isc.sans.org/port_details.php?port=$dport' target='top'>
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<font color='#FFFFFF'>$dport$dserv</font>
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</a>
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</td>
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<td align='center'>
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$bytes_in / $bytes_out
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</td>
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<td align='center'>$state</td>
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<td align='center'>$ttl</td>
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</tr>
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END
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}
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# Close the main table.
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print "</table>";
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&Header::closebox();
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&Header::closebigbox();
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&Header::closepage();
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sub format_bytes($) {
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my $bytes = shift;
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my @units = ("B", "k", "M", "G", "T");
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foreach my $unit (@units) {
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if ($bytes < 1024) {
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return sprintf("%d%s", $bytes, $unit);
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}
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$bytes /= 1024;
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}
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return sprintf("%d%s", $bytes, $units[$#units]);
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}
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sub format_time($) {
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my $time = shift;
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my $seconds = $time % 60;
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my $minutes = $time / 60;
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my $hours = 0;
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if ($minutes >= 60) {
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$hours = $minutes / 60;
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$minutes %= 60;
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}
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return sprintf("%3d:%02d:%02d", $hours, $minutes, $seconds);
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}
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sub ipcolour($) {
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my $id = 0;
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my $colour = ${Header::colourred};
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my ($ip) = $_[0];
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my $found = 0;
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foreach my $line (@network) {
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if ($network[$id] eq '') {
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$id++;
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} else {
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if (!$found && ipv4_in_network($network[$id], $masklen[$id], $ip) ) {
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$found = 1;
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$colour = $colour[$id];
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}
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$id++;
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}
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}
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return $colour;
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}
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1;
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