diff options
Diffstat (limited to 'lib/network/shorewall.pm')
| -rw-r--r-- | lib/network/shorewall.pm | 172 |
1 files changed, 172 insertions, 0 deletions
diff --git a/lib/network/shorewall.pm b/lib/network/shorewall.pm new file mode 100644 index 0000000..2567b48 --- /dev/null +++ b/lib/network/shorewall.pm @@ -0,0 +1,172 @@ +package network::shorewall; # $Id$ + +use detect_devices; +use network::ethernet; +use network::network; +use run_program; +use common; +use log; + +sub check_iptables() { + -f "$::prefix/etc/sysconfig/iptables" || + $::isStandalone && do { + system('modprobe iptable_nat'); + -x '/sbin/iptables' && listlength(`/sbin/iptables -t nat -nL`) > 8; + }; +} + +sub set_config_file { + my ($file, @l) = @_; + + my $done; + substInFile { + if (!$done && (/^#LAST LINE/ || eof)) { + $_ = join('', map { join("\t", @$_) . "\n" } @l) . $_; + $done = 1; + } else { + $_ = '' if /^[^#]/; + } + } "$::prefix/etc/shorewall/$file"; +} + +sub get_config_file { + my ($file) = @_; + map { [ split ' ' ] } grep { !/^#/ } cat_("$::prefix/etc/shorewall/$file"); +} + +sub get_ifcfg_interface() { + my $net = {}; + network::network::read_net_conf($net); + network::tools::get_default_gateway_interface($net); +} + +sub dev_to_shorewall { + my ($dev) = @_; + $dev =~ /^ippp/ && "ippp+" || + $dev =~ /^ppp/ && "ppp+" || + $dev; +} + +sub get_shorewall_interface() { + #- read shorewall configuration first + foreach (get_config_file('interfaces')) { + $_->[0] eq 'net' and return $_->[1]; + } + #- else try to find the best interface available + dev_to_shorewall(get_ifcfg_interface()); +} + +our $ask_shorewall_interface_label = N_("Please enter the name of the interface connected to the internet. + +Examples: + ppp+ for modem or DSL connections, + eth0, or eth1 for cable connection, + ippp+ for a isdn connection. +"); + +sub shorewall_interface_choices { + my ($refval) = @_; + my $modules_conf = modules::any_conf->read; + my @all_cards = network::ethernet::get_eth_cards($modules_conf); + my %net_devices = network::ethernet::get_eth_cards_names(@all_cards); + put_in_hash(\%net_devices, { 'ppp+' => 'ppp+', 'ippp+' => 'ippp+' }); + + [ { label => N("Net Device"), val => $refval, list => [ sort keys %net_devices ], format => sub { $net_devices{$_[0]} || $_[0] }, not_edit => 0 } ]; +} + +sub read_default_interfaces { + my ($conf, $o_in) = @_; + my $interface = get_shorewall_interface(); + $o_in and $o_in->ask_from('', translate($ask_shorewall_interface_label), shorewall_interface_choices(\$interface)); + set_net_interface($conf, $interface); +} + +sub set_net_interface { + my ($conf, $interface) = @_; + $conf->{net_interface} = $interface; + my $net = {}; + network::network::read_net_conf($net); + my @all_intf = uniq((map { dev_to_shorewall($_) } keys %{$net->{ifcfg}}), detect_devices::getNet()); + #- keep all other interfaces (but alias interfaces) in local zone + $conf->{loc_interface} = [ grep { !/:/ && $_ ne $interface } @all_intf ]; +} + +sub read { + my ($o_in) = @_; + my @rules = get_config_file('rules'); + my %conf = (disabled => !glob_("$::prefix/etc/rc3.d/S*shorewall"), + ports => join(' ', map { + my $e = $_; + map { "$_/$e->[3]" } split(',', $e->[4]); + } grep { $_->[0] eq 'ACCEPT' && $_->[1] eq 'net' } @rules), + ); + $conf{redirects}{$_->[3]}{$_->[2]} = $_->[4] foreach grep { $_->[0] eq 'REDIRECT' } @rules; + + if (my ($e) = get_config_file('masq')) { + $conf{masq_subnet} = $e->[1]; + } + read_default_interfaces(\%conf, $o_in); + $conf{net_interface} && \%conf; +} + +sub ports_by_proto { + my ($ports) = @_; + my %ports_by_proto; + foreach (split ' ', $ports) { + m!^(\d+(?::\d+)?)/(udp|tcp|icmp)$! or die "bad port $_\n"; + push @{$ports_by_proto{$2}}, $1; + } + \%ports_by_proto; +} + +sub write { + my ($conf) = @_; + my $default_intf = get_ifcfg_interface(); + my $use_pptp = $default_intf =~ /^ppp/ && cat_("$::prefix/etc/ppp/peers/$default_intf") =~ /pptp/; + my $ports_by_proto = ports_by_proto($conf->{ports}); + + my $interface_settings = sub { + my ($zone, $interface) = @_; + [ $zone, $interface, 'detect', if_(detect_devices::is_bridge_interface($interface), 'routeback') ]; + }; + + set_config_file("zones", + [ 'net', 'ipv4' ], + if_($conf->{loc_interface}[0], [ 'loc', 'ipv4' ]), + [ 'fw', 'firewall' ], + ); + set_config_file('interfaces', + $interface_settings->('net', $conf->{net_interface}), + (map { $interface_settings->('loc', $_) } @{$conf->{loc_interface} || []}), + ); + set_config_file('policy', + if_($conf->{loc_interface}[0], [ 'loc', 'net', 'ACCEPT' ], [ 'loc', 'fw', 'ACCEPT' ], [ 'fw', 'loc', 'ACCEPT' ]), + [ 'fw', 'net', 'ACCEPT' ], + [ 'net', 'all', 'DROP', 'info' ], + [ 'all', 'all', 'REJECT', 'info' ], + ); + set_config_file('rules', + if_($use_pptp, [ 'ACCEPT', 'fw', 'loc:10.0.0.138', 'tcp', '1723' ]), + if_($use_pptp, [ 'ACCEPT', 'fw', 'loc:10.0.0.138', 'gre' ]), + (map_each { [ 'ACCEPT', 'net', 'fw', $::a, join(',', @$::b), '-' ] } %$ports_by_proto), + (map { + map_each { [ 'REDIRECT', 'loc', $::a, $_, $::b, '-' ] } %{$conf->{redirects}{$_}}; + } keys %{$conf->{redirects}}), + ); + set_config_file('masq', if_($conf->{masq_subnet}, [ $conf->{net_interface}, $conf->{masq_subnet} ])); + + require services; + if ($conf->{disabled}) { + services::disable('shorewall', $::isInstall); + run_program::rooted($::prefix, '/sbin/shorewall', 'clear') unless $::isInstall; + } else { + services::enable('shorewall', $::isInstall); + } +} + +sub update_interfaces_list() { + my $shorewall = network::shorewall::read(); + $shorewall && !$shorewall->{disabled} and network::shorewall::write($shorewall); +} + +1; |