forked from extern/shorewall_code
cf4ad08b96
git-svn-id: https://shorewall.svn.sourceforge.net/svnroot/shorewall/trunk@5680 fbd18981-670d-0410-9b5c-8dc0c1a9a2bb
585 lines
16 KiB
Perl
585 lines
16 KiB
Perl
#
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# Shorewall-pl 3.9 -- /usr/share/shorewall-pl/Shorewall/Config.pm
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#
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# This program is under GPL [http://www.gnu.org/copyleft/gpl.htm]
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#
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# (c) 2007 - Tom Eastep (teastep@shorewall.net)
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#
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# Complete documentation is available at http://shorewall.net
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of Version 2 of the GNU General Public License
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# as published by the Free Software Foundation.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA
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#
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#
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package Shorewall::Config;
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use strict;
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use warnings;
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use Shorewall::Common;
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our @ISA = qw(Exporter);
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our @EXPORT = qw(find_file get_configuration report_capabilities propagateconfig append_file run_user_exit generate_aux_config %config %env %capabilities );
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our @EXPORT_OK = ();
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our @VERSION = 1.00;
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#
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# Misc Globals
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#
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our %env = ( SHAREDIR => '/usr/share/shorewall' ,
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CONFDIR => '/etc/shorewall',
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SHAREDIRPL => '/usr/share/shorewall-pl/',
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LOGPARMS => '',
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VERSION => '3.9.0-1',
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);
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#
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# From shorewall.conf file
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#
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our %config =
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( STARTUP_ENABLED => undef,
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VERBOSITY => undef,
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#
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# Logging
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#
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LOGFILE => undef,
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LOGFORMAT => undef,
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LOGTAGONLY => undef,
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LOGRATE => undef,
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LOGBURST => undef,
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LOGALLNEW => undef,
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BLACKLIST_LOGLEVEL => undef,
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MACLIST_LOG_LEVEL => undef,
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TCP_FLAGS_LOG_LEVEL => undef,
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RFC1918_LOG_LEVEL => undef,
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SMURF_LOG_LEVEL => undef,
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LOG_MARTIANS => undef,
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#
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# Location of Files
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#
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IPTABLES => undef,
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#PATH is inherited
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PATH => undef,
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SHOREWALL_SHELL => undef,
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SUBSYSLOCK => undef,
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MODULESDIR => undef,
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#CONFIG_PATH is inherited
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CONFIG_PATH => undef,
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RESTOREFILE => undef,
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IPSECFILE => undef,
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#
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# Default Actions/Macros
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#
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DROP_DEFAULT => undef,
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REJECT_DEFAULT => undef,
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ACCEPT_DEFAULT => undef,
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QUEUE_DEFAULT => undef,
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#
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# Firewall Options
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#
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BRIDGING => undef,
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IP_FORWARDING => undef,
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ADD_IP_ALIASES => undef,
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ADD_SNAT_ALIASES => undef,
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RETAIN_ALIASES => undef,
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TC_ENABLED => undef,
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TC_EXPERT => undef,
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CLEAR_TC => undef,
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MARK_IN_FORWARD_CHAIN => undef,
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CLAMPMSS => undef,
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ROUTE_FILTER => undef,
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DETECT_DNAT_IPADDRS => undef,
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MUTEX_TIMEOUT => undef,
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ADMINISABSENTMINDED => undef,
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BLACKLISTNEWONLY => undef,
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DELAYBLACKLISTLOAD => undef,
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MODULE_SUFFIX => undef,
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DISABLE_IPV6 => undef,
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DYNAMIC_ZONES => undef,
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PKTTYPE=> undef,
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RFC1918_STRICT => undef,
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MACLIST_TABLE => undef,
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MACLIST_TTL => undef,
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SAVE_IPSETS => undef,
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MAPOLDACTIONS => undef,
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FASTACCEPT => undef,
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IMPLICIT_CONTINUE => undef,
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HIGH_ROUTE_MARKS => undef,
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USE_ACTIONS=> undef,
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OPTIMIZE => undef,
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EXPORTPARAMS => undef,
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SHOREWALL_PL => undef,
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#
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# Packet Disposition
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#
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MACLIST_DISPOSITION => undef,
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TCP_FLAGS_DISPOSITION => undef,
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BLACKLIST_DISPOSITION => undef,
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ORIGINAL_POLICY_MATCH => undef,
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);
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#
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# Config options and global settings that are to be copied to object
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#
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my @propagateconfig = qw/ CLEAR_TC DISABLE_IPV6 ADMINISABSENTMINDED IP_FORWARDING MODULESDIR MODULE_SUFFIX LOGFORMAT SUBSYSLOCK/;
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my @propagateenv = qw/ LOGLIMIT LOGTAGONLY LOGRULENUMBERS /;
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#
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# From parsing the capabilities file
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#
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our %capabilities =
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( NAT_ENABLED => undef,
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MANGLE_ENABLED => undef,
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MULTIPORT => undef,
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XMULTIPORT => undef,
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CONNTRACK_MATCH => undef,
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USEPKTTYPE => undef,
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POLICY_MATCH => undef,
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PHYSDEV_MATCH => undef,
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LENGTH_MATCH => undef,
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IPRANGE_MATCH => undef,
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RECENT_MATCH => undef,
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OWNER_MATCH => undef,
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IPSET_MATCH => undef,
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CONNMARK => undef,
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XCONNMARK => undef,
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CONNMARK_MATCH => undef,
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XCONNMARK_MATCH => undef,
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RAW_TABLE => undef,
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IPP2P_MATCH => undef,
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CLASSIFY_TARGET => undef,
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ENHANCED_REJECT => undef,
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KLUDGEFREE => undef,
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MARK => undef,
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XMARK => undef,
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MANGLE_FORWARD => undef,
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COMMENTS => undef,
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ADDRTYPE => undef,
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);
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my %capdesc = ( NAT_ENABLED => 'NAT',
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MANGLE_ENABLED => 'Packet Mangling',
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MULTIPORT => 'Multi-port Match' ,
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XMULTIPORT => 'Extended Multi-port Match',
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CONNTRACK_MATCH => 'Connection Tracking Match',
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USEPKTTYPE => 'Packet Type Match',
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POLICY_MATCH => 'Policy Match',
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PHYSDEV_MATCH => 'Physdev Match',
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LENGTH_MATCH => 'Packet length Match',
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IPRANGE_MATCH => 'IP Range Match',
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RECENT_MATCH => 'Recent Match',
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OWNER_MATCH => 'Owner Match',
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IPSET_MATCH => 'Ipset Match',
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CONNMARK => 'CONNMARK Target',
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XCONNMARK => 'Extended CONNMARK Target',
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CONNMARK_MATCH => 'Connmark Match',
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XCONNMARK_MATCH => 'Extended Connmark Match',
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RAW_TABLE => 'Raw Table',
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IPP2P_MATCH => 'IPP2P Match',
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CLASSIFY_TARGET => 'CLASSIFY Target',
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ENHANCED_REJECT => 'Extended Reject',
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KLUDGEFREE => 'Repeat match',
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MARK => 'MARK Target',
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XMARK => 'Extended Mark Target',
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MANGLE_FORWARD => 'Mangle FORWARD Chain',
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COMMENTS => 'Comments',
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ADDRTYPE => 'Address Type Match',
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);
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#
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# Search the CONFIG_PATH for the passed file
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#
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sub find_file($)
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{
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my $filename=$_[0];
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if ( $filename =~ '/.*' ) {
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return $filename;
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}
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my $directory;
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for $directory ( split ':', $ENV{CONFIG_PATH} ) {
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my $file = "$directory/$filename";
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return $file if -f $file;
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}
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"$env{CONFDIR}/$filename";
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}
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sub default ( $$ ) {
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my ( $var, $val ) = @_;
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$config{$var} = $val unless defined $config{$var};
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}
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sub default_yes_no ( $$ ) {
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my ( $var, $val ) = @_;
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my $curval = "\L$config{$var}";
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if ( $curval ) {
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if ( $curval eq 'no' ) {
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$config{$var} = '';
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} else {
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fatal_error "Invalid value for $var ($val)" unless $curval eq 'yes';
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}
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} else {
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$config{$var} = $val;
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}
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}
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sub report_capabilities() {
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sub report_capability( $ ) {
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my $cap = $_[0];
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print " $capdesc{$cap}: ";
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print $capabilities{$cap} ? "Available\n" : "Not Available\n";
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}
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print "Shorewall has detected the following capabilities:\n";
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for my $cap ( sort { $capdesc{$a} cmp $capdesc{$b} } keys %capabilities ) {
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report_capability $cap;
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}
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}
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#
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# Read the shorewall.conf file and establish global hashes %config and %env.
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#
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sub get_configuration() {
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my $file = find_file 'shorewall.conf';
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if ( -f $file ) {
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if ( -r _ ) {
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open CONFIG , $file or fatal_error "Unable to open $file: $!";
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while ( $line = <CONFIG> ) {
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chomp $line;
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next if $line =~ /^\s*#/;
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next if $line =~ /^\s*$/;
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$line = $1 . ( $ENV{$2} || '' ) . $3 while $line =~ /^(.*?)\$([a-zA-Z]\w*)(.*)$/;
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if ( $line =~ /^([a-zA-Z]\w*)\s*=\s*(.*)$/ ) {
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my ($var, $val) = ($1, $2);
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unless ( exists $config{$var} ) {
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warning_message "Unknown configuration option \"$var\" ignored";
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next;
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}
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$config{$var} = $val =~ /\"([^\"]*)\"$/ ? $1 : $val;
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} else {
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fatal_error "Unrecognized entry in $file: $line";
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}
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}
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close CONFIG;
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} else {
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fatal_error "Cannot read $file (Hint: Are you root?)";
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}
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} else {
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fatal_error "$file does not exist!";
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}
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$file = "$ENV{TMP_DIR}/capabilities";
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if ( -f $file ) {
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if ( -r _ ) {
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open CAPS , $file or fatal_error "Unable to open $file: $!";
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while ( $line = <CAPS> ) {
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chomp $line;
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next if $line =~ /^\s*#/;
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next if $line =~ /^\s*$/;
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if ( $line =~ /^([a-zA-Z]\w*)\s*=\s*(.*)$/ ) {
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my ($var, $val) = ($1, $2);
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unless ( exists $capabilities{$var} ) {
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warning_message "Unknown capability \"$var\" ignored";
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next;
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}
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$capabilities{$var} = $val =~ /^\"([^\"]*)\"$/ ? $1 : $val;
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} else {
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fatal_error "Unrecognized entry in $file: $line";
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}
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}
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close CAPS;
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} else {
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fatal_error "Cannot read $file (Hint: Are you root?)";
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}
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} else {
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fatal_error "$file does not exist!";
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}
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if ( $ENV{DEBUG} ) {
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print "\n";
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print "Capabilities:\n";
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for my $var (sort keys %capabilities) {
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print " $var=$capabilities{$var}\n";
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}
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}
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$env{ORIGINAL_POLICY_MATCH} = $capabilities{POLICY_MATCH};
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default 'MODULE_PREFIX', 'o gz ko o.gz ko.gz';
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if ( $config{LOGRATE} || $config{LOGBURST} ) {
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$env{LOGLIMIT} = '-m limit';
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$env{LOGLIMIT} .= " --limit $config{LOGRATE}" if $config{LOGRATE};
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$env{LOGLIMIT} .= " --limit-burst $config{LOGBURST}" if $config{LOGBURST};
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} else {
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$env{LOGLIMIT} = '';
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}
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if ( $config{IP_FORWARDING} ) {
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fatal_error "Invalid value ( $config{IP_FORWARDING} ) for IP_FORWARDING"
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unless $config{IP_FORWARDING} =~ /^(On|Off|Keep)$/i;
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} else {
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$config{IP_FORWARDING} = 'On';
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}
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default_yes_no 'ADD_IP_ALIASES' , 'Yes';
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default_yes_no 'ADD_SNAT_ALIASES' , '';
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default_yes_no 'ROUTE_FILTER' , '';
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default_yes_no 'LOG_MARTIANS' , '';
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default_yes_no 'DETECT_DNAT_IPADDRS' , '';
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default_yes_no 'DETECT_DNAT_IPADDRS' , '';
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default_yes_no 'CLEAR_TC' , 'Yes';
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default_yes_no 'CLAMPMSS' , '' unless $config{CLAMPMSS} =~ /^\d+$/;
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unless ( $config{ADD_IP_ALIASES} || $config{ADD_SNAT_ALIASES} ) {
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$config{RETAIN_ALIASES} = '';
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} else {
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default_yes_no 'RETAIN_ALIASES' , '';
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}
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default_yes_no 'ADMINISABSENTMINDED' , '';
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default_yes_no 'BLACKLISTNEWONLY' , '';
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default_yes_no 'DISABLE_IPV6' , '';
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default_yes_no 'DYNAMIC_ZONES' , '';
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fatal_error "DYNAMIC_ZONES=Yes is incompatible with the -e option" if $config{DYNAMIC_ZONES} and $ENV{EXPORT};
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default_yes_no 'BRIDGING' , '';
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fatal_error 'BRIDGING=Yes is not supported by Shorewall-pl' . $env{VERSION} if $config{BRIDGING};
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default_yes_no 'STARTUP_ENABLED' , 'Yes';
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default_yes_no 'DELAYBLACKLISTLOAD' , '';
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default_yes_no 'LOGTAGONLY' , '';
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default_yes_no 'RFC1918_STRICT' , '';
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default_yes_no 'SAVE_IPSETS' , '';
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warning_message 'SAVE_IPSETS=Yes is not supported by Shorewall-pl ' . $env{VERSION} if $config{SAVE_IPSETS};
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default_yes_no 'MAPOLDACTIONS' , '';
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warning_message 'MAPOLDACTIONS=Yes is not supported by Shorewall-pl ' . $env{VERSION} if $config{MAPOLDACTIONS};
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default_yes_no 'FASTACCEPT' , '';
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default_yes_no 'IMPLICIT_CONTINUE' , '';
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default_yes_no 'HIGH_ROUTE_MARKS' , '';
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default_yes_no 'TC_EXPERT' , '';
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default_yes_no 'USE_ACTIONS' , 'Yes';
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default_yes_no 'EXPORTPARAMS' , '';
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default_yes_no 'MARK_IN_FORWARD_CHAIN' , '';
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$capabilities{XCONNMARK} = '' unless $capabilities{XCONNMARK_MATCH} and $capabilities{XMARK};
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default 'BLACKLIST_DISPOSITION' , 'DROP';
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my $val;
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$env{MACLIST_TARGET} = 'reject';
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if ( $val = $config{MACLIST_DISPOSITION} ) {
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unless ( $val eq 'REJECT' ) {
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if ( $val eq 'DROP' ) {
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$env{MACLIST_TARGET} = 'DROP';
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} elsif ( $val eq 'ACCEPT' ) {
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$env{MACLIST_TARGET} = 'RETURN';
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} else {
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fatal_error "Invalid value ( $config{MACLIST_DISPOSITION} ) for MACLIST_DISPOSITION"
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}
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}
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} else {
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$config{MACLIST_DISPOSITION} = 'REJECT';
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}
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if ( $val = $config{MACLIST_TABLE} ) {
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if ( $val eq 'mangle' ) {
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fatal_error 'MACLIST_DISPOSITION=REJECT is not allowed with MACLIST_TABLE=mangle' if $config{MACLIST_DISPOSITION} eq 'REJECT';
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} else {
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fatal_error "Invalid value ($val) for MACLIST_TABLE option" unless $val eq 'filter';
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}
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} else {
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default 'MACLIST_TABLE' , 'filter';
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}
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if ( $val = $config{TCP_FLAGS_DISPOSITION} ) {
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fatal_error "Invalid value ($config{TCP_FLAGS_DISPOSITION}) for TCP_FLAGS_DISPOSITION" unless $val =~ /^(REJECT|ACCEPT|DROP)$/;
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} else {
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$config{TCP_FLAGS_DISPOSITION} = 'DROP';
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}
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$env{TC_SCRIPT} = '';
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if ( $val = "\L$config{TC_ENABLED}" ) {
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if ( $val eq 'yes' ) {
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$file = find_file 'tcstart';
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fatal_error "Unable to find tcstart file" unless -f $file;
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} elsif ( $val ne 'internal' ) {
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fatal_error "Invalid value ($config{TC_ENABLED}) for TC_ENABLED" unless $val eq 'no';
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$config{TC_ENABLED} = '';
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}
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}
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default 'RESTOREFILE' , 'restore';
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default 'DROP_DEFAULT' , 'Drop';
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default 'REJECT_DEFAULT' , 'Reject';
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default 'QUEUE_DEFAULT' , 'none';
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default 'ACCEPT_DEFAULT' , 'none';
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default 'OPTIMIZE' , 0;
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default 'IPSECFILE' , 'ipsec';
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for my $default qw/DROP_DEFAULT REJECT_DEFAULT QUEUE_DEFAULT ACCEPT_DEFAULT/ {
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$config{$default} = 'none' if "\L$config{$default}" eq 'none';
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}
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$val = $config{OPTIMIZE};
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fatal_error "Invalid OPTIMIZE value ($val)" unless ( $val eq '0' ) || ( $val eq '1' );
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fatal_error "Invalid IPSECFILE value ($config{IPSECFILE}" unless $config{IPSECFILE} eq 'zones';
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$env{MARKING_CHAIN} = $config{MARK_IN_FORWARD_CHAIN} ? 'tcfor' : 'tcpre';
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if ( $val = $config{LOGFORMAT} ) {
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my $result;
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eval {
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if ( $val =~ /%d/ ) {
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$env{LOGRULENUMBERS} = 'Yes';
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$result = sprintf "$val", 'fooxx2barxx', 1, 'ACCEPT';
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} else {
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$result = sprintf "$val", 'fooxx2barxx', 'ACCEPT';
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}
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};
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fatal_error "Invalid LOGFORMAT ($val)" if $@;
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fatal_error "LOGFORMAT string is longer than 29 characters: \"$val\""
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if length $result > 29;
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$env{MAXZONENAMELENGTH} = int ( 5 + ( ( 29 - (length $result ) ) / 2) );
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} else {
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$env{LOGFORMAT}='Shorewall:%s:%s:';
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$env{MAXZONENAMELENGTH} = 5;
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}
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if ( $ENV{DEBUG} ) {
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print "\n";
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print "Configuration:\n";
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for my $var (sort keys %config) {
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if ( defined $config{$var} ) {
|
|
print " $var=$config{$var}\n";
|
|
} else {
|
|
print " $var=\n";
|
|
}
|
|
}
|
|
|
|
print "\n";
|
|
print "Environment:\n";
|
|
|
|
for my $var (sort keys %env) {
|
|
print " $var=$env{$var}\n" if $env{$var};
|
|
}
|
|
}
|
|
|
|
}
|
|
|
|
sub propagateconfig() {
|
|
for my $option ( @Shorewall::Config::propagateconfig ) {
|
|
my $value = $config{$option} || '';
|
|
emit "$option=\"$value\"";
|
|
}
|
|
|
|
for my $option ( @Shorewall::Config::propagateenv ) {
|
|
my $value = $env{$option} || '';
|
|
emit "$option=\"$value\"";
|
|
}
|
|
}
|
|
|
|
sub append_file( $ ) {
|
|
my $user_exit = find_file $_[0];
|
|
|
|
unless ( $user_exit =~ /$env{SHAREDIR}/ ) {
|
|
if ( -f $user_exit ) {
|
|
save_progress_message "Processing $user_exit ...";
|
|
copy1 $user_exit;
|
|
}
|
|
}
|
|
}
|
|
|
|
#
|
|
# Run a Perl extension script
|
|
#
|
|
sub run_user_exit( $ ) {
|
|
my $chainref = $_[0];
|
|
my $file = find_file $chainref->{name};
|
|
|
|
if ( -f $file ) {
|
|
progress_message "Processing $file...";
|
|
|
|
unless (my $return = do $file) {
|
|
fatal_error "Couldn't parse $file: $@" if $@;
|
|
fatal_error "Couldn't do $file: $!" unless defined $return;
|
|
fatal_error "Couldn't run $file" unless $return;
|
|
}
|
|
}
|
|
}
|
|
|
|
sub generate_aux_config() {
|
|
sub conditionally_add_option( $ ) {
|
|
my $option = $_[0];
|
|
|
|
my $value = $config{$option};
|
|
|
|
emit "[ -n \"\${$option:=$value}\" ]" if $value;
|
|
}
|
|
|
|
sub conditionally_add_option1( $ ) {
|
|
my $option = $_[0];
|
|
|
|
my $value = $config{$option};
|
|
|
|
emit "$option=\"$value\"" if $value;
|
|
}
|
|
|
|
create_temp_aux_config;
|
|
|
|
emit( "#\n# Shorewall auxiliary configuration file created by Shorewall-pl version " . $env{VERSION} . ' - ' . ( localtime ) . "\n#" );
|
|
|
|
for my $option qw(VERBOSITY LOGFILE LOGFORMAT IPTABLES PATH SHOREWALL_SHELL SUBSYSLOCK RESTOREFILE SAVE_IPSETS) {
|
|
conditionally_add_option $option;
|
|
}
|
|
|
|
conditionally_add_option1 'TC_ENABLED';
|
|
|
|
finalize_aux_config;
|
|
|
|
}
|
|
|
|
1;
|