From dd7aa24a5f6389c9627961ec0ed82968432f7863 Mon Sep 17 00:00:00 2001 From: zezinho Date: Wed, 3 Apr 2019 17:40:10 +0200 Subject: - drakfirewall: cloned to a drakfirewall6 for IPv6 firewall --- lib/network/shorewall6.pm | 251 ++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 251 insertions(+) create mode 100644 lib/network/shorewall6.pm (limited to 'lib/network/shorewall6.pm') 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; -- cgit v1.2.1