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305 lines
10 KiB
Perl
305 lines
10 KiB
Perl
#
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# Shorewall 4.4 -- /usr/share/shorewall/Shorewall/Tunnels.pm
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#
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# This program is under GPL [http://www.gnu.org/licenses/old-licenses/gpl-2.0.txt]
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# (c) 2007,2008,2009,2010,2011 - Tom Eastep (teastep@shorewall.net)
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#
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# Complete documentation is available at http://shorewall.net
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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 Version 2 of the GNU General Public License
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# as published by the Free Software Foundation.
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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, write to the Free Software
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# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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#
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# This module handles the /etc/shorewall/tunnels file.
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#
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package Shorewall::Tunnels;
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require Exporter;
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use Shorewall::Config qw(:DEFAULT :internal);
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use Shorewall::Zones;
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use Shorewall::IPAddrs;
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use Shorewall::Chains qw(:DEFAULT :internal);
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use Shorewall::Rules;
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use strict;
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our @ISA = qw(Exporter);
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our @EXPORT = qw( setup_tunnels );
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our @EXPORT_OK = ( );
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our $VERSION = 'MODULEVERSION';
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#
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# Here starts the tunnel stuff -- we really should get rid of this crap...
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#
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sub setup_tunnels() {
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our $fw = firewall_zone;
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sub setup_one_ipsec {
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my ($inchainref, $outchainref, $kind, $source, $dest, $gatewayzones) = @_;
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( $kind, my ( $qualifier , $remainder ) ) = split( /:/, $kind, 3 );
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my $noah = 1;
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fatal_error "Invalid IPSEC modifier ($qualifier:$remainder)" if defined $remainder;
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if ( defined $qualifier ) {
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if ( $qualifier eq 'ah' ) {
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fatal_error ":ah not allowed with ipsecnat tunnels" if $kind eq 'ipsecnat';
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$noah = 0;
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} else {
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fatal_error "Invalid IPSEC modifier ($qualifier)" if $qualifier ne 'noah';
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}
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}
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my @options = have_capability( 'RAW_TABLE' ) ? state_imatch 'NEW,UNTRACKED' : state_imatch 'NEW';
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add_tunnel_rule $inchainref, p => 50, @$source;
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add_tunnel_rule $outchainref, p => 50, @$dest;
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unless ( $noah ) {
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add_tunnel_rule $inchainref, p => 51, @$source;
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add_tunnel_rule $outchainref, p => 51, @$dest;
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}
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if ( $kind eq 'ipsec' ) {
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add_tunnel_rule $inchainref, p => 'udp --dport 500', @$source, @options;
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add_tunnel_rule $outchainref, p => 'udp --dport 500', @$dest, @options;
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} else {
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add_tunnel_rule $inchainref, p => 'udp', @$source, multiport => '--dports 500,4500', @options;
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add_tunnel_rule $outchainref, p => 'udp', @$dest, multiport => '--dports 500,4500', @options;
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}
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unless ( $gatewayzones eq '-' ) {
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for my $zone ( split_list $gatewayzones, 'zone' ) {
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my $type = zone_type( $zone );
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fatal_error "Invalid zone ($zone) for GATEWAY ZONE" if $type == FIREWALL || $type == BPORT;
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$inchainref = ensure_rules_chain( rules_chain( ${zone}, ${fw} ) );
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$outchainref = ensure_rules_chain( rules_chain( ${fw}, ${zone} ) );
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unless ( have_ipsec ) {
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add_tunnel_rule $inchainref, p => 50, @$source;
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add_tunnel_rule $outchainref, p => 50, @$dest;
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unless ( $noah ) {
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add_tunnel_rule $inchainref, p => 51, @$source;
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add_tunnel_rule $outchainref, p => 51, @$dest;
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}
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}
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if ( $kind eq 'ipsec' ) {
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add_tunnel_rule $inchainref, p => 'udp --dport 500', @$source, @options;
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add_tunnel_rule $outchainref, p => 'udp --dport 500', @$dest, @options;
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} else {
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add_tunnel_rule $inchainref, p => 'udp', @$source, multiport => '--dports 500,4500', @options;
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add_tunnel_rule $outchainref, p => 'udp', @$dest, multiport => '--dports 500,4500', @options;
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}
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}
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}
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}
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sub setup_one_other {
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my ($inchainref, $outchainref, $source, $dest , $protocol) = @_;
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add_tunnel_rule $inchainref , p => $protocol, @$source;
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add_tunnel_rule $outchainref , p => $protocol, @$dest;
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}
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sub setup_pptp_client {
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my ($inchainref, $outchainref, $kind, $source, $dest ) = @_;
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add_tunnel_rule $outchainref, p => 47, @$dest;
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add_tunnel_rule $inchainref, p => 47, @$source;
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add_tunnel_rule $outchainref, p => 'tcp --dport 1723', @$dest;
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}
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sub setup_pptp_server {
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my ($inchainref, $outchainref, $kind, $source, $dest ) = @_;
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add_tunnel_rule $inchainref, p => 47, @$source;
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add_tunnel_rule $outchainref, p => 47, @$dest;
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add_tunnel_rule $inchainref, p => 'tcp --dport 1723', @$source
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}
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sub setup_one_openvpn {
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my ($inchainref, $outchainref, $kind, $source, $dest) = @_;
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my $protocol = 'udp';
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my $port = 1194;
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( $kind, my ( $proto, $p, $remainder ) ) = split( /:/, $kind, 4 );
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fatal_error "Invalid port ($p:$remainder)" if defined $remainder;
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if ( supplied $p ) {
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$port = $p;
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$protocol = $proto;
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} elsif ( supplied $proto ) {
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if ( "\L$proto" =~ /udp|tcp/ ) {
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$protocol = $proto;
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} else {
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$port = $proto;
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}
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}
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add_tunnel_rule $inchainref, p => "$protocol --dport $port", @$source;
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add_tunnel_rule $outchainref, p => "$protocol --dport $port", @$dest;;
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}
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sub setup_one_openvpn_client {
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my ($inchainref, $outchainref, $kind, $source, $dest) = @_;
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my $protocol = 'udp';
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my $port = 1194;
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( $kind, my ( $proto, $p , $remainder ) ) = split( /:/, $kind, 4 );
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fatal_error "Invalid port ($p:$remainder)" if defined $remainder;
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if ( supplied $p ) {
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$port = $p;
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$protocol = $proto;
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} elsif ( supplied $proto ) {
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if ( "\L$proto" =~ /udp|tcp/ ) {
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$protocol = $proto;
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} else {
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$port = $proto;
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}
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}
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add_tunnel_rule $inchainref, p => "$protocol --sport $port", @$source;
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add_tunnel_rule $outchainref, p => "$protocol --dport $port", @$dest;
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}
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sub setup_one_openvpn_server {
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my ($inchainref, $outchainref, $kind, $source, $dest) = @_;
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my $protocol = 'udp';
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my $port = 1194;
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( $kind, my ( $proto, $p , $remainder ) ) = split( /:/, $kind, 4 );
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fatal_error "Invalid port ($p:$remainder)" if defined $remainder;
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if ( supplied $p ) {
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$port = $p;
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$protocol = $proto;
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} elsif ( supplied $proto ) {
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if ( "\L$proto" =~ /udp|tcp/ ) {
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$protocol = $proto;
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} else {
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$port = $proto;
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}
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}
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add_tunnel_rule $inchainref, p => "$protocol --dport $port" , @$source;
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add_tunnel_rule $outchainref, p => "$protocol --sport $port", @$dest;
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}
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sub setup_one_l2tp {
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my ($inchainref, $outchainref, $kind, $source, $dest) = @_;
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fatal_error "Unknown option ($1)" if $kind =~ /^.*?:(.*)$/;
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add_tunnel_rule $inchainref, p => 'udp --sport 1701 --dport 1701', @$source;
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add_tunnel_rule $outchainref, p => 'udp --sport 1701 --dport 1701', @$dest;
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}
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sub setup_one_generic {
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my ($inchainref, $outchainref, $kind, $source, $dest) = @_;
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my $protocol = 'udp';
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my $port = '--dport 5000';
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if ( $kind =~ /.*:.*:.*/ ) {
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( $kind, $protocol, $port) = split /:/, $kind;
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$port = "--dport $port";
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} else {
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$port = '';
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( $kind, $protocol ) = split /:/ , $kind if $kind =~ /.*:.*/;
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}
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add_tunnel_rule $inchainref, p => "$protocol $port", @$source;
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add_tunnel_rule $outchainref, p => "$protocol $port", @$dest;
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}
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sub setup_one_tunnel($$$$) {
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my ( $kind , $zone, $gateways, $gatewayzones ) = @_;
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my $zonetype = zone_type( $zone );
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fatal_error "Invalid tunnel ZONE ($zone)" if $zonetype & ( FIREWALL | BPORT );
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my $inchainref = ensure_rules_chain( rules_chain( ${zone}, ${fw} ) );
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my $outchainref = ensure_rules_chain( rules_chain( ${fw}, ${zone} ) );
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$gateways = ALLIP if $gateways eq '-';
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my ( $net, $excl ) = handle_network_list( $gateways , 'src' );
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( $net, $excl ) = handle_network_list( $gateways , 'dst' );
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fatal_error "Exclusion is not allowed in the GATEWAYS column" if $excl;
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for my $gateway ( split_list $gateways, 'GATEWAYS' ) {
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my @source = imatch_source_net $gateway;
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my @dest = imatch_dest_net $gateway;
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my %tunneltypes = ( 'ipsec' => { function => \&setup_one_ipsec , params => [ $kind, \@source, \@dest , $gatewayzones ] } ,
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'ipsecnat' => { function => \&setup_one_ipsec , params => [ $kind, \@source, \@dest , $gatewayzones ] } ,
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'ipip' => { function => \&setup_one_other, params => [ \@source, \@dest , 4 ] } ,
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'gre' => { function => \&setup_one_other, params => [ \@source, \@dest , 47 ] } ,
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'6to4' => { function => \&setup_one_other, params => [ \@source, \@dest , 41 ] } ,
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'6in4' => { function => \&setup_one_other, params => [ \@source, \@dest , 41 ] } ,
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'pptpclient' => { function => \&setup_pptp_client, params => [ $kind, \@source, \@dest ] } ,
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'pptpserver' => { function => \&setup_pptp_server, params => [ $kind, \@source, \@dest ] } ,
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'openvpn' => { function => \&setup_one_openvpn, params => [ $kind, \@source, \@dest ] } ,
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'openvpnclient' => { function => \&setup_one_openvpn_client, params => [ $kind, \@source, \@dest ] } ,
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'openvpnserver' => { function => \&setup_one_openvpn_server, params => [ $kind, \@source, \@dest ] } ,
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'l2tp' => { function => \&setup_one_l2tp , params => [ $kind, \@source, \@dest ] } ,
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'generic' => { function => \&setup_one_generic , params => [ $kind, \@source, \@dest ] } ,
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);
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$kind = "\L$kind";
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(my $type) = split /:/, $kind;
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my $tunnelref = $tunneltypes{ $type };
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fatal_error "Tunnels of type $type are not supported" unless $tunnelref;
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$tunnelref->{function}->( $inchainref, $outchainref, @{$tunnelref->{params}} );
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}
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progress_message " Tunnel \"$currentline\" $done";
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}
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#
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# Setup_Tunnels() Starts Here
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#
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if ( my $fn = open_file( 'tunnels', 1, 1 ) ) {
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first_entry "$doing $fn...";
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while ( read_a_line( NORMAL_READ ) ) {
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my ( $kind, $zone, $gateway, $gatewayzones ) = split_line1 'tunnels file', { type => 0, zone => 1, gateway => 2, gateways => 2, gateway_zone => 3 , gateway_zones => 3 }, {}, 4;
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fatal_error 'TYPE must be specified' if $kind eq '-';
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fatal_error 'ZONE must be specified' if $zone eq '-';
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setup_one_tunnel $kind, $zone, $gateway, $gatewayzones;
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}
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}
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}
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1;
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