From b61548ee174481b25e750be9f7d4c7484a0ebf96 Mon Sep 17 00:00:00 2001
From: Pascal Rigaux <pixel@mandriva.com>
Date: Thu, 22 Aug 2002 22:42:56 +0000
Subject: - add network::shorewall - add tinyfirewall during install

---
 perl-install/network/shorewall.pm | 136 ++++++++++++++++++++++++++++++++++++++
 1 file changed, 136 insertions(+)
 create mode 100644 perl-install/network/shorewall.pm

(limited to 'perl-install/network/shorewall.pm')

diff --git a/perl-install/network/shorewall.pm b/perl-install/network/shorewall.pm
new file mode 100644
index 000000000..a9f8ff384
--- /dev/null
+++ b/perl-install/network/shorewall.pm
@@ -0,0 +1,136 @@
+package network::shorewall; # $Id$
+
+use diagnostics;
+use strict;
+
+use detect_devices;
+use network::netconnect;
+use common;
+use log;
+
+my @drakgw_ports = qw(domain bootps);
+
+sub check_iptables {
+    my ($in) = @_;
+
+    my $existing_config = -f "$::prefix/etc/sysconfig/iptables";
+
+    $existing_config ||= $::isStandalone && do {
+	system('modprobe iptable_nat');
+	-x '/sbin/iptables' && listlength(`/sbin/iptables -t nat -nL`) > 8;
+    };
+
+    !$existing_config || $in->ask_okcancel(_("Firewalling configuration detected!"),
+					   _("Warning! An existing firewalling configuration has been detected. You may need some manual fix after installation."));
+}
+
+sub set_config_file {
+    my ($file, @l) = @_;
+
+    my $done;
+    substInFile {
+	if (!$done && (/^#LAST LINE/ || eof)) {
+	    $_ = join('', map { join("\t", @$_) . "\n" } @l) . $_;
+	    $done = 1;
+	} else {
+	    $_ = '' if /^[^#]/;
+	}
+    } "/etc/shorewall/$file";
+}
+
+sub get_config_file {
+    my ($file) = @_;
+    map { [ split ' ' ] } grep { !/^#/ } cat_("/etc/shorewall/$file");
+}
+
+sub default_interfaces {
+    my %conf;
+
+    my @l = detect_devices::getNet() or return;
+    if (@l == 1) {
+	$conf{net_interface} = $l[0];
+	$conf{loc_interface} = [ 'lo0' ];
+    } else {
+	$conf{net_interface} = network::netconnect::get_net_device() or return;
+	$conf{loc_interface} = [ grep { $_ ne $conf{net_interface} } @l ];
+    }
+    \%conf;
+}
+
+sub read {
+    my %conf;
+
+    $conf{disabled} = !glob_("$::prefix/etc/rc3.d/S*shorewall");
+
+    $conf{ports} = 
+      join(' ', map { 
+	  my $e = $_;
+	  map { "$_/$e->[3]" } split(',', $e->[4]);
+      } grep { $_->[0] eq 'ACCEPT' && $_->[1] eq 'net' } get_config_file('rules'));
+
+    if (my ($e) = get_config_file('masq')) {
+	$conf{masquerade}{subnet} = $e->[1] if $e->[1];
+    }
+    foreach (get_config_file('interfaces')) {
+	my ($name, $interface) = @$_;
+	if ($name eq 'net') {
+	    $conf{net_interface} = $interface;
+	} elsif ($name eq 'masq') {
+	    $conf{masquerade}{interface} = $interface;
+	} elsif ($name eq 'loc') {
+	    push @{$conf{loc_interface}}, $interface;
+	} else {
+	    log::l("unknown interface name $name");
+	}
+    }
+    $conf{net_interface} && \%conf;
+}
+
+sub write {
+    my ($conf) = @_;
+
+    my %ports_by_proto;
+    foreach (split ' ', $conf->{ports}) {
+	m!^(\d+)/(udp|tcp)$! or die "bad port $_\n";
+	push @{$ports_by_proto{$2}}, $1;
+    }
+
+    set_config_file("zones", 
+		    [ 'net', 'Net', 'Internet zone' ],
+		    if_($conf->{masquerade}, [ 'masq', 'Masquerade', 'Masquerade Local' ]),
+		    if_($conf->{loc_interface}, [ 'loc', 'Local', 'Local' ]),
+		   );
+    set_config_file('interfaces',
+		    [ 'net', $conf->{net_interface}, 'detect' ],
+		    $conf->{masquerade} ? [ 'masq', $conf->{masquerade}{interface}, 'detect' ] : (),
+		    (map { [ 'loc', $_, 'detect' ] } @{$conf->{loc_interface} || []}),
+		   );
+    set_config_file('policy',
+		    if_($conf->{masquerade}, [ 'masq', 'net', 'ACCEPT' ]),
+		    if_($conf->{loc_interface}, [ 'loc', 'net', 'ACCEPT' ]),
+		    [ 'fw', 'net', 'ACCEPT' ],
+		    [ 'net', 'all', 'DROP', 'info' ],
+		    [ 'all', 'all', 'REJECT', 'info' ],
+		   );
+    set_config_file('rules',
+		    (map
+		     { map_each { [ 'ACCEPT', $_, 'fw', $::a, join(',', @$::b), '-' ] } %ports_by_proto }
+		      ('net', if_($conf->{masquerade}, 'masq'), if_($conf->{loc_interface}, 'loc'))),
+		    if_($conf->{masquerade}, map { [ 'ACCEPT', 'masq', 'fw', 'tcp', join(',', @drakgw_ports), '-' ] } 'tcp', 'udp'),
+		   );
+    set_config_file('masq', 
+		    $conf->{masquerade} ? [ $conf->{net_interface}, $conf->{masquerade}{subnet} ]: (),
+		   );
+
+    if ($conf->{disabled}) {
+	run_program::rooted($::prefix, 'chkconfig', '--del', 'shorewall');
+	run_program::run('service', 'shorewall', 'stop') if $::isStandalone;
+	run_program::run('service', 'shorewall', 'clear') if $::isStandalone;
+    } else {
+	run_program::rooted($::prefix, 'chkconfig', '--add', 'shorewall');
+	run_program::run('service', 'shorewall', 'restart') if $::isStandalone;
+    }
+}
+
+1;
+
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