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package network::shorewall; # $Id$
use detect_devices;
use network::netconnect;
use network::ethernet;
use network::network;
use run_program;
use common;
use log;
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 || $in->ask_okcancel(N("Firewalling configuration detected!"),
N("Warning! An existing firewalling configuration has been detected. You may need some manual fixes after installation."));
}
sub set_config_file {
my ($file, @l) = @_;
my $done;
substInFile {
if (!$done && (/^#LAST LINE/ || eof)) {
$_ = join('', map { join("\t", @$_) . "\n" } @l) . $_;
$done = 1;
} else {
$_ = '' if /^[^#]/;
}
} "$::prefix/etc/shorewall/$file";
}
sub get_config_file {
my ($file) = @_;
map { [ split ' ' ] } grep { !/^#/ } cat_("$::prefix/etc/shorewall/$file");
}
sub get_default_device() {
my $netcnx = {};
my $netc = {};
my $intf = {};
network::netconnect::read_net_conf($netcnx, $netc, $intf);
network::tools::get_default_gateway_interface($netc, $intf);
}
sub get_net_device() {
my $default_dev = get_default_device();
$default_dev =~ /^ippp/ && "ippp+" ||
$default_dev =~ /^ppp/ && "ppp+" ||
$default_dev;
}
sub default_interfaces_silent() {
my %conf;
my @l = detect_devices::getNet() or return;
if (@l == 1) {
$conf{net_interface} = $l[0];
} else {
$conf{net_interface} = get_net_device() || $l[0];
$conf{loc_interface} = [ grep { $_ ne $conf{net_interface} } @l ];
}
\%conf;
}
sub default_interfaces {
my ($in) = @_;
my %conf;
my $card_netconnect = get_net_device() || "eth0";
log::l("[drakgw] Information from netconnect: ignore card $card_netconnect");
my @l = detect_devices::getNet() or return;
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+' });
$in->ask_from('',
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.
"),
[ { label => N("Net Device"), val => \$card_netconnect, list => [ sort keys %net_devices ], format => sub { $net_devices{$_[0]} || $_[0] }, not_edit => 0 } ]);
$conf{net_interface} = $card_netconnect;
$conf{loc_interface} = [ grep { $_ ne $conf{net_interface} } @l ];
\%conf;
}
sub read {
my ($o_in) = @_;
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' && $_->[1] eq 'net' } get_config_file('rules'))
);
if (my ($e) = get_config_file('masq')) {
$conf{masquerade}{subnet} = $e->[1] if $e->[1];
}
put_in_hash(\%conf, $o_in ? default_interfaces($o_in) : default_interfaces_silent());
$conf{net_interface} && \%conf;
}
sub write {
my ($conf) = @_;
my $default_dev = get_default_device();
my $use_pptp = $default_dev =~ /^ppp/ && cat_("$::prefix/etc/ppp/peers/$default_dev") =~ /pptp/;
my $squid_port = network::network::read_squid_conf()->{http_port}[0];
my %ports_by_proto;
foreach (split ' ', $conf->{ports}) {
m!^(\d+(:\d+)?)/(udp|tcp|icmp)$! or die "bad port $_\n";
push @{$ports_by_proto{$3}}, $1;
}
set_config_file("zones",
[ 'net', 'Net', 'Internet zone' ],
if_($conf->{loc_interface}[0], [ 'loc', 'Local', 'Local' ]),
);
set_config_file('interfaces',
[ 'net', $conf->{net_interface}, 'detect' ],
(map { [ 'loc', $_, 'detect' ] } @{$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 {
map_each { [ 'ACCEPT', $_, 'fw', $::a, join(',', @$::b), '-' ] } %ports_by_proto;
} ('net', if_($conf->{loc_interface}[0], 'loc'))),
);
if (cat_("/etc/shorewall/rules") !~ /^\s*REDIRECT\s*loc\s*$squid_port\s+(\S+)/mg && $squid_port && -f "/var/run/squid.pid" && grep { /Loc/i } cat_("/etc/shorewall/zones")) {
substInFile {
s/#LAST LINE -- ADD YOUR ENTRIES BEFORE THIS ONE -- DO NOT REMOVE/REDIRECT\tloc\t$squid_port\ttcp\twww\t-\nACCEPT\tfw\tnet\ttcp\twww\n#LAST LINE -- ADD YOUR ENTRIES BEFORE THIS ONE -- DO NOT REMOVE/;
} "/etc/shorewall/rules";
}
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', '>', '/dev/null', 'shorewall', 'stop') if $::isStandalone;
} else {
run_program::rooted($::prefix, 'chkconfig', '--add', 'shorewall');
run_program::run('service', '>', '/dev/null', 'shorewall', 'restart') if $::isStandalone;
}
}
1;
|
