- drakfirewall: cloned to a drakfirewall6 for IPv6 firewall

1 files changed, 251 insertions, 0 deletions

diff --git a/lib/network/shorewall6.pm b/lib/network/shorewall6.pm
new file mode 100644
index 0000000..4c7aa47
--- /dev/null
+++ b/lib/network/shorewall6.pm
@@ -0,0 +1,251 @@
+package network::shorewall6; # $Id: shorewall6.pm 254244 2009-03-18 22:54:32Z eugeni $
+
+use lib qw(/usr/lib/libDrakX);   # helps perl_checker
+use detect_devices;
+use network::network;
+use run_program;
+use common;
+use log;
+
+my $shorewall6_root = "/etc/shorewall6";
+our $firewall_icon = $::isInstall ? 'banner-security' : '/usr/share/mcc/themes/default/firewall-mdk.png';
+
+sub check_iptables() {
+    -f "$::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, $ver, @l) = @_;
+
+    my $done;
+    substInFile {
+	my $last_line = /^#LAST LINE/ && $_;
+	if (!$done && ($last_line || eof)) {
+	    $_ = join('', map { join("\t", @$_) . "\n" } @l);
+	    $_ .= $last_line if $last_line;
+	    $done = 1;
+	} else {
+	    $_ = '' unless
+	      /^#/ || $file eq 'rules' && /^SECTION/;
+	}
+    } "$::prefix${shorewall6_root}${ver}/$file";
+}
+
+sub get_config_file {
+    my ($file, $o_ver) = @_;
+    map { [ split ' ' ] } grep { !/^#/ } cat_("$::prefix${shorewall6_root}${o_ver}/$file");
+}
+
+# Note: Called from drakguard and drakfirewall.pm...
+# Deliberately adding shorewall6 support here now ;-)
+sub set_in_file {
+    my ($file, $enabled, @list) = @_;
+    my $done;
+    substInFile {
+	my $last_line = /^#LAST LINE/ && $_;
+	foreach my $l (@list) { s|^$l\n|| }
+	if (!$done && $enabled && ($last_line || eof)) {
+	    $_ = join('', map { "$_\n" } @list);
+	    $_ .= $last_line if $last_line;
+	    $done = 1;
+	}
+    } "$::prefix${shorewall6_root}/$file";
+}
+
+sub dev_to_shorewall6 {
+    my ($dev) = @_;
+    $dev =~ /^ippp/ && "ippp+" ||
+    $dev =~ /^ppp/ && "ppp+" ||
+    $dev;
+}
+
+sub get_net_zone_interfaces {
+    my ($interfacesfile, $_net, $all_intf) = @_;
+    #- read shorewall6 configuration first
+    my @interfaces = map { $_->[1] } grep { $_->[0] eq 'net' } $interfacesfile;
+    #- else try to find the best interface available
+    @interfaces ? @interfaces : @{$all_intf || []};
+}
+
+sub get_zones {
+    my ($conf, $o_in) = @_;
+    my $interfacesfile = get_config_file('interfaces', $conf->{version} || '');
+    my $net = {};
+    network::network::read_net_conf($net);
+    #- find all interfaces but alias interfaces
+    my @all_intf = grep { !/:/ } uniq(keys(%{$net->{ifcfg}}), detect_devices::get_net_interfaces());
+    my %net_zone = map { $_ => undef } @all_intf;
+    $net_zone{$_} = 1 foreach get_net_zone_interfaces($interfacesfile, $net, \@all_intf);
+    $o_in and $o_in->ask_from_({
+        title => N("Firewall IPv6 configuration"),
+        icon => $firewall_icon,
+        messages => N("Please select the interfaces that will be protected by the firewall.
+
+All interfaces directly connected to Internet should be selected,
+while interfaces connected to a local network may be unselected.
+
+If you intend to use Mageia Internet Connection sharing,
+unselect interfaces which will be connected to local network.
+
+Which interfaces should be protected?
+"),
+    }, [
+        map {
+            { text => network::tools::get_interface_description($net, $_), val => \$net_zone{$_}, type => 'bool' };
+        } (sort keys %net_zone) ]);
+    ($conf->{net_zone}, $conf->{loc_zone}) = partition { $net_zone{$_} } keys %net_zone;
+}
+
+sub add_interface_to_net_zone {
+    my ($conf, $interface) = @_;
+    if (!member($interface, @{$conf->{net_zone}})) {
+        push @{$conf->{net_zone}}, $interface;
+        @{$conf->{loc_zone}} = grep { $_ ne $interface } @{$conf->{loc_zone}};
+    }
+}
+
+sub read {
+    my ($o_in, $o_ver) = @_;
+    my $ver = '';
+    $ver = $o_ver if $o_ver;
+    #- read old rules file if config is not moved to rules.drakx yet
+    my @rules = get_config_file(-f "$::prefix${shorewall6_root}${ver}/rules.drakx" ? 'rules.drakx' : 'rules', $ver);
+    require services;
+    my %conf = (disabled => !services::starts_on_boot("shorewall6"),
+                version => $ver,
+                ports => join(' ', map {
+                    my $e = $_;
+                    map { "$_/$e->[3]" } split(',', $e->[4]);
+                } grep { $_->[0] eq 'ACCEPT' && $_->[1] eq 'net' } @rules),
+               );
+    push @{$conf{accept_local_users}{$_->[4]}}, $_->[8] foreach grep { $_->[0] eq 'ACCEPT+' } @rules;
+    $conf{redirects}{$_->[3]}{$_->[4]} = $_->[2] foreach grep { $_->[0] eq 'REDIRECT' } @rules;
+
+    if (my ($e) = get_config_file('masq', $ver)) {
+	($conf{masq}{net_interface}, $conf{masq}{subnet}) = @$e;
+    }
+
+    my @policy = get_config_file('policy', $ver);
+    $conf{log_net_drop} = @policy ? (any { $_->[0] eq 'net' && $_->[1] eq 'all' && $_->[2] eq 'DROP' && $_->[3] } @policy) : 1;
+
+    get_zones(\%conf, $o_in);
+    get_config_file('zones', $ver) && \%conf;
+}
+
+sub ports_by_proto {
+    my ($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, $o_in) = @_;
+    my $ver = $conf->{version} || '';
+    my $use_pptp = any { /^ppp/ && cat_("$::prefix/etc/ppp/peers/$_") =~ /pptp/ } @{$conf->{net_zone}};
+    my $ports_by_proto = ports_by_proto($conf->{ports});
+    my $has_loc_zone = to_bool(@{$conf->{loc_zone} || []});
+
+    my ($include_drakx, $other_rules) = partition { $_ eq "INCLUDE\trules.drakx\n" } grep { !/^(#|SECTION)/ } cat_("$::prefix${shorewall6_root}${ver}/rules");
+    #- warn if the config is already in rules.drakx and additionnal rules are configured
+    if (!is_empty_array_ref($include_drakx) && !is_empty_array_ref($other_rules)) {
+        my %actions = (
+            keep => N("Keep custom rules"),
+            drop => N("Drop custom rules"),
+        );
+        my $action = 'keep';
+        !$o_in || $o_in->ask_from_(
+            {
+                messages => N("Your IPv6 firewall configuration has been manually edited and contains
+rules that may conflict with the configuration that has just been set up.
+What do you want to do?"),
+                title => N("Firewall"),
+                icon => 'banner-security',
+            },
+            [ { val => \$action, type => 'list', list => [ 'keep', 'drop' ], format => sub { $actions{$_[0]} } } ]) or return;
+        #- reset the rules files if the user has chosen to drop modifications
+        undef $include_drakx if $action eq 'drop';
+    }
+
+    my $interface_settings = sub {
+        my ($zone, $interface) = @_;
+        [ $zone, $interface, 'detect', if_(detect_devices::is_bridge_interface($interface), 'bridge') ];
+    };
+
+    set_config_file('zones', $ver,
+                    if_($has_loc_zone, [ 'loc', 'ipv' . ($ver || '6') ]),
+                    [ 'net', 'ipv' . ($ver || '6') ],
+                    [ 'fw', 'firewall' ],
+                );
+    set_config_file('interfaces',  $ver,
+                    (map { $interface_settings->('net', $_) } @{$conf->{net_zone}}),
+                    (map { $interface_settings->('loc', $_) } @{$conf->{loc_zone} || []}),
+                );
+    set_config_file('policy', $ver,
+                    if_($has_loc_zone, [ 'loc', 'net', 'ACCEPT' ], [ 'loc', 'fw', 'ACCEPT' ], [ 'fw', 'loc', 'ACCEPT' ]),
+                    [ 'fw', 'net', 'ACCEPT' ],
+                    [ 'net', 'all', 'DROP', if_($conf->{log_net_drop}, 'info') ],
+                    [ 'all', 'all', 'REJECT', 'info' ],
+                );
+    if (is_empty_array_ref($include_drakx)) {
+        #- make sure the rules.drakx config is read, erasing user modifications
+        set_config_file('rules', $ver, [ 'INCLUDE', 'rules.drakx' ]);
+    }
+    output_with_perm("$::prefix${shorewall6_root}${ver}/" . 'rules.drakx', 0600, map { join("\t", @$_) . "\n" } (
+        if_($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), '-' ] } %$ports_by_proto),
+        (map_each {
+            if_($::b, map { [ 'ACCEPT+', 'fw', 'net', 'tcp', $::a, '-', '-', '-', $_ ] } @$::b);
+        } %{$conf->{accept_local_users}}),
+        (map {
+            my $proto = $_;
+            #- WARNING: won't redirect ports from the firewall system if a local zone exists
+            #- set redirect_fw_only to workaround
+            map_each {
+                map { [ 'REDIRECT', $_, $::b, $proto, $::a, '-' ] } 'fw', if_($has_loc_zone, 'loc');
+            } %{$conf->{redirects}{$proto}};
+        } keys %{$conf->{redirects}}),
+    ));
+    set_config_file('masq', $ver, if_(exists $conf->{masq}, [ $conf->{masq}{net_interface}, $conf->{masq}{subnet} ]));
+
+    require services;
+    if ($conf->{disabled}) {
+        services::disable('shorewall6', $::isInstall);
+        run_program::rooted($::prefix, '/sbin/shorewall6', 'clear') unless $::isInstall;
+    } else {
+        services::enable('shorewall6', $::isInstall);
+    }
+}
+
+sub set_redirected_ports {
+    my ($conf, $proto, $dest, @ports) = @_;
+    if (@ports) {
+        $conf->{redirects}{$proto}{$_} = $dest foreach @ports;
+    } else {
+        my $r = $conf->{redirects}{$proto};
+        @ports = grep { $r->{$_} eq $dest } keys %$r;
+        delete $r->{$_} foreach @ports;
+    }
+}
+
+sub update_interfaces_list {
+    my ($o_intf) = @_;
+    if (!$o_intf || !member($o_intf, map { $_->[1] } get_config_file('interfaces'))) {
+        my $shorewall = network::shorewall::read();
+        $shorewall && !$shorewall->{disabled} and network::shorewall::write($shorewall);
+    }
+    if (!$o_intf || !member($o_intf, map { $_->[1] } get_config_file('interfaces', 6))) {
+        my $shorewall6 = network::shorewall6::read(undef, 6);
+        $shorewall6 && !$shorewall6->{disabled} and network::shorewall::write($shorewall6);
+    }
+}
+
+1;