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Eliminate the Actions module
This commit is contained in:
Tom Eastep
parent
3d4aaad0eb
commit
17a3ca62d5
@ -1,285 +0,0 @@
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#
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# Shorewall 4.4 -- /usr/share/shorewall/Shorewall/Actions.pm
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#
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# This program is under GPL [http://www.gnu.org/licenses/old-licenses/gpl-2.0.txt]
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#
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# (c) 2007,2008,2009,2010 - 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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#
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# This module contains the action variables and routines needed by both the Policy
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# and rules modules.
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#
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package Shorewall::Actions;
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require Exporter;
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use Shorewall::Config qw(:DEFAULT :internal);
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use Shorewall::Zones;
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use Shorewall::Chains qw(:DEFAULT :internal);
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use Shorewall::IPAddrs;
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use Scalar::Util 'reftype';
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use strict;
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our @ISA = qw(Exporter);
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our @EXPORT = qw(
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split_action
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get_target_param
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normalize_action
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normalize_action_name
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use_action
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%actions
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%usedactions
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%default_actions
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);
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our @EXPORT_OK = qw( initialize );
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our $VERSION = '4.4_16';
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#
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# Default actions for each policy.
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#
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our %default_actions;
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# Action Table
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#
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# %actions{ <action1> => { requires => { <requisite1> = 1,
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# <requisite2> = 1,
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# ...
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# } ,
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# actchain => <action chain number> # Used for generating unique chain names for each <level>:<tag> pair.
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#
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our %actions;
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#
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# Contains an entry for each used <action>:<level>[:<tag>] that maps to the associated chain.
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#
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our %usedactions;
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our $family;
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#
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# Rather than initializing globals in an INIT block or during declaration,
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# we initialize them in a function. This is done for two reasons:
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#
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# 1. Proper initialization depends on the address family which isn't
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# known until the compiler has started.
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#
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# 2. The compiler can run multiple times in the same process so it has to be
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# able to re-initialize its dependent modules' state.
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#
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sub initialize( $ ) {
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$family = shift;
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%default_actions = ( DROP => 'none' ,
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REJECT => 'none' ,
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ACCEPT => 'none' ,
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QUEUE => 'none' );
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%actions = ();
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%usedactions = ();
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}
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#
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# Return ( action, level[:tag] ) from passed full action
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#
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sub split_action ( $ ) {
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my $action = $_[0];
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my $target = '';
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my $max = 3;
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#
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# The following rather grim RE, when matched, breaks the action into two parts:
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#
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# basicaction(param)
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# logging part (may be empty)
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#
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# The param may contain one or more ':' characters
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#
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if ( $action =~ /^([^(:]+\(.*?\))(:(.*))?$/ ) {
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$target = $1;
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$action = $2 ? $3 : '';
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$max = 2;
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}
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my @a = split( /:/ , $action, 4 );
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fatal_error "Invalid ACTION ($action)" if ( $action =~ /::/ ) || ( @a > $max );
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$target = shift @a unless $target;
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( $target, join ":", @a );
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}
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#
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# Split the passed target into the basic target and parameter
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#
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sub get_target_param( $ ) {
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my ( $target, $param ) = split '/', $_[0];
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unless ( defined $param ) {
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( $target, $param ) = ( $1, $2 ) if $target =~ /^(.*?)[(](.*)[)]$/;
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}
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( $target, $param );
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}
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#
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# Create a normalized action name from the passed pieces
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#
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sub normalize_action( $$$ ) {
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my $action = shift;
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my $level = shift;
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my $param = shift;
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( $level, my $tag ) = split ':', $level;
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$level = 'none' unless defined $level && $level ne '';
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$tag = '' unless defined $tag;
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$param = '' unless defined $param;
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join( ':', $action, $level, $tag, $param );
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}
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sub normalize_action_name( $ ) {
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my $target = shift;
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my ( $action, $loglevel) = split_action $target;
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normalize_action( $action, $loglevel, '' );
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}
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#
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# Create and record a log action chain -- Log action chains have names
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# that are formed from the action name by prepending a "%" and appending
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# a 1- or 2-digit sequence number. In the functions that follow,
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# the $chain, $level and $tag variable serves as arguments to the user's
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# exit. We call the exit corresponding to the name of the action but we
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# set $chain to the name of the iptables chain where rules are to be added.
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# Similarly, $level and $tag contain the log level and log tag respectively.
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#
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# The maximum length of a chain name is 30 characters -- since the log
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# action chain name is 2-3 characters longer than the base chain name,
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# this function truncates the original chain name where necessary before
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# it adds the leading "%" and trailing sequence number.
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#
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sub createlogactionchain( $$$$$ ) {
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my ( $normalized, $action, $level, $tag, $param ) = @_;
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my $chain = $action;
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my $actionref = $actions{$action};
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my $chainref;
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validate_level $level;
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$actionref = new_action $action unless $actionref;
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$chain = substr $chain, 0, 28 if ( length $chain ) > 28;
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CHECKDUP:
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{
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$actionref->{actchain}++ while $chain_table{filter}{'%' . $chain . $actionref->{actchain}};
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$chain = substr( $chain, 0, 27 ), redo CHECKDUP if ( $actionref->{actchain} || 0 ) >= 10 and length $chain == 28;
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}
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$usedactions{$normalized} = $chainref = new_standard_chain '%' . $chain . $actionref->{actchain}++;
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fatal_error "Too many invocations of Action $action" if $actionref->{actchain} > 99;
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$chainref->{action} = $action;
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unless ( $targets{$action} & BUILTIN ) {
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dont_optimize $chainref;
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my $file = find_file $chain;
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if ( -f $file ) {
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progress_message "Processing $file...";
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my @params = split /,/, $param;
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unless ( my $return = eval `cat $file` ) {
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fatal_error "Couldn't parse $file: $@" if $@;
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fatal_error "Couldn't do $file: $!" unless defined $return;
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fatal_error "Couldn't run $file";
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}
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}
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}
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$chainref;
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}
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sub createsimpleactionchain( $ ) {
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my $action = shift;
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return createlogactionchain("$action:none::", $action, 'none', '', '' ) if $filter_table->{$action} || $nat_table->{$action};
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my $chainref = new_standard_chain $action;
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$usedactions{"$action:none::"} = $chainref;
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$chainref->{action} = $action;
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unless ( $targets{$action} & BUILTIN ) {
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dont_optimize $chainref;
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my $file = find_file $action;
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if ( -f $file ) {
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progress_message "Processing $file...";
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my ( $level, $tag ) = ( '', '' );
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unless ( my $return = eval `cat $file` ) {
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fatal_error "Couldn't parse $file: $@" if $@;
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fatal_error "Couldn't do $file: $!" unless defined $return;
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fatal_error "Couldn't run $file";
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}
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}
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}
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$chainref;
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}
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#
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# Create an action chain and run its associated user exit
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#
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sub createactionchain( $ ) {
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my $normalized = shift;
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my ( $target, $level, $tag, $param ) = split /:/, $normalized;
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assert( defined $param );
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my $chainref;
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if ( $level eq 'none' && $tag eq '' && $param eq '' ) {
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createsimpleactionchain $target;
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} else {
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createlogactionchain $normalized, $target , $level , $tag, $param;
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}
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}
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#
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# Mark an action as used and create its chain. Returns one if the chain was
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# created on this call or 0 otherwise.
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#
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sub use_action( $ ) {
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my $normalized = shift;
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if ( $usedactions{$normalized} ) {
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0;
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} else {
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createactionchain $normalized;
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}
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}
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1;
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@ -32,7 +32,6 @@ use Shorewall::Nat;
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use Shorewall::Providers;
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use Shorewall::Tc;
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use Shorewall::Tunnels;
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use Shorewall::Actions;
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use Shorewall::Accounting;
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use Shorewall::Rules;
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use Shorewall::Proc;
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@ -63,7 +62,6 @@ sub initialize_package_globals() {
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Shorewall::Nat::initialize;
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Shorewall::Providers::initialize($family);
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Shorewall::Tc::initialize($family);
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Shorewall::Actions::initialize( $family );
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Shorewall::Accounting::initialize;
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Shorewall::Rules::initialize($family);
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Shorewall::Proxyarp::initialize($family);
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@ -1629,7 +1629,7 @@ sub close_file() {
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#
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# The following two functions allow module clients to nest opens. This happens frequently
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# in the Actions module.
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# in the Rules module.
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#
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sub push_open( $ ) {
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@ -29,7 +29,6 @@ use Shorewall::Config qw(:DEFAULT :internal);
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use Shorewall::IPAddrs;
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use Shorewall::Zones;
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use Shorewall::Chains qw(:DEFAULT :internal);
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use Shorewall::Actions;
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use Shorewall::Policy;
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use Shorewall::Proc;
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@ -27,12 +27,11 @@ require Exporter;
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use Shorewall::Config qw(:DEFAULT :internal);
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use Shorewall::Zones;
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use Shorewall::Chains qw( :DEFAULT :internal) ;
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use Shorewall::Actions;
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use strict;
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our @ISA = qw(Exporter);
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our @EXPORT = qw( validate_policy apply_policy_rules complete_standard_chain setup_syn_flood_chains save_policies optimize_policy_chains);
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our @EXPORT = qw( validate_policy apply_policy_rules complete_standard_chain setup_syn_flood_chains save_policies optimize_policy_chains get_target_param %policy_actions );
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our @EXPORT_OK = qw( );
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our $VERSION = '4.4_16';
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@ -40,11 +39,32 @@ our $VERSION = '4.4_16';
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our @policy_chains;
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our %policy_actions;
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our %default_actions;
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#
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# Called by the compiler
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#
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sub initialize() {
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@policy_chains = ();
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@policy_chains = ();
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%policy_actions = ();
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%default_actions = ( DROP => 'none' ,
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REJECT => 'none' ,
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ACCEPT => 'none' ,
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QUEUE => 'none' );
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}
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#
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# Split the passed target into the basic target and parameter
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#
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sub get_target_param( $ ) {
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my ( $target, $param ) = split '/', $_[0];
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unless ( defined $param ) {
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( $target, $param ) = ( $1, $2 ) if $target =~ /^(.*?)[(](.*)[)]$/;
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}
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( $target, $param );
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}
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#
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@ -143,6 +163,12 @@ sub print_policy($$$$) {
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}
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}
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sub use_action( $ ) {
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my $action = shift;
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$policy_actions{$action} = 1;
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}
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sub process_a_policy() {
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our %validpolicies;
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@ -177,7 +203,7 @@ sub process_a_policy() {
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my $defaulttype = $targets{$default} || 0;
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if ( $defaulttype & ACTION ) {
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use_action( normalize_action_name $default );
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use_action( $default );
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} else {
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fatal_error "Unknown Default Action ($default)";
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}
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@ -318,7 +344,7 @@ sub validate_policy()
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fatal_error "Default Action $option=$action not found";
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}
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use_action( normalize_action_name $action );
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use_action( $action );
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$default_actions{$map{$option}} = $action;
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}
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@ -28,7 +28,6 @@ require Exporter;
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use Shorewall::Config qw(:DEFAULT :internal);
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use Shorewall::Zones;
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use Shorewall::Chains qw(:DEFAULT :internal);
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use Shorewall::Actions;
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use Shorewall::IPAddrs;
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use Shorewall::Policy;
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use Scalar::Util 'reftype';
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@ -64,6 +63,20 @@ our $macro_nest_level;
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our @actionstack;
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# Action Table
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#
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# %actions{ <action1> => { requires => { <requisite1> = 1,
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# <requisite2> = 1,
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# ...
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# } ,
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# actchain => <action chain number> # Used for generating unique chain names for each <level>:<tag> pair.
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#
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our %actions;
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#
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# Contains an entry for each used <action>:<level>[:<tag>] that maps to the associated chain.
|
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#
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our %usedactions;
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#
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# Rather than initializing globals in an INIT block or during declaration,
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# we initialize them in a function. This is done for two reasons:
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@ -79,6 +92,8 @@ sub initialize( $ ) {
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%macros = ();
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@actionstack = ();
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$macro_nest_level = 0;
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%actions = ();
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%usedactions = ();
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if ( $family == F_IPV4 ) {
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@builtins = qw/dropBcast allowBcast dropNotSyn rejNotSyn dropInvalid allowInvalid allowinUPnP forwardUPnP Limit/;
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@ -87,6 +102,185 @@ sub initialize( $ ) {
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}
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}
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#
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# Return ( action, level[:tag] ) from passed full action
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#
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sub split_action ( $ ) {
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my $action = $_[0];
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my $target = '';
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my $max = 3;
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#
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# The following rather grim RE, when matched, breaks the action into two parts:
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#
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# basicaction(param)
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# logging part (may be empty)
|
||||
#
|
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# The param may contain one or more ':' characters
|
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#
|
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if ( $action =~ /^([^(:]+\(.*?\))(:(.*))?$/ ) {
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$target = $1;
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$action = $2 ? $3 : '';
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$max = 2;
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}
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my @a = split( /:/ , $action, 4 );
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fatal_error "Invalid ACTION ($action)" if ( $action =~ /::/ ) || ( @a > $max );
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$target = shift @a unless $target;
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( $target, join ":", @a );
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}
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#
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# Create a normalized action name from the passed pieces
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#
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sub normalize_action( $$$ ) {
|
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my $action = shift;
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my $level = shift;
|
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my $param = shift;
|
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|
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( $level, my $tag ) = split ':', $level;
|
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|
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$level = 'none' unless defined $level && $level ne '';
|
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$tag = '' unless defined $tag;
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$param = '' unless defined $param;
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join( ':', $action, $level, $tag, $param );
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}
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sub normalize_action_name( $ ) {
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my $target = shift;
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my ( $action, $loglevel) = split_action $target;
|
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|
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normalize_action( $action, $loglevel, '' );
|
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}
|
||||
|
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#
|
||||
# Create and record a log action chain -- Log action chains have names
|
||||
# that are formed from the action name by prepending a "%" and appending
|
||||
# a 1- or 2-digit sequence number. In the functions that follow,
|
||||
# the $chain, $level and $tag variable serves as arguments to the user's
|
||||
# exit. We call the exit corresponding to the name of the action but we
|
||||
# set $chain to the name of the iptables chain where rules are to be added.
|
||||
# Similarly, $level and $tag contain the log level and log tag respectively.
|
||||
#
|
||||
# The maximum length of a chain name is 30 characters -- since the log
|
||||
# action chain name is 2-3 characters longer than the base chain name,
|
||||
# this function truncates the original chain name where necessary before
|
||||
# it adds the leading "%" and trailing sequence number.
|
||||
#
|
||||
sub createlogactionchain( $$$$$ ) {
|
||||
my ( $normalized, $action, $level, $tag, $param ) = @_;
|
||||
my $chain = $action;
|
||||
my $actionref = $actions{$action};
|
||||
my $chainref;
|
||||
|
||||
validate_level $level;
|
||||
|
||||
$actionref = new_action $action unless $actionref;
|
||||
|
||||
$chain = substr $chain, 0, 28 if ( length $chain ) > 28;
|
||||
|
||||
CHECKDUP:
|
||||
{
|
||||
$actionref->{actchain}++ while $chain_table{filter}{'%' . $chain . $actionref->{actchain}};
|
||||
$chain = substr( $chain, 0, 27 ), redo CHECKDUP if ( $actionref->{actchain} || 0 ) >= 10 and length $chain == 28;
|
||||
}
|
||||
|
||||
$usedactions{$normalized} = $chainref = new_standard_chain '%' . $chain . $actionref->{actchain}++;
|
||||
|
||||
fatal_error "Too many invocations of Action $action" if $actionref->{actchain} > 99;
|
||||
|
||||
$chainref->{action} = $action;
|
||||
|
||||
unless ( $targets{$action} & BUILTIN ) {
|
||||
|
||||
dont_optimize $chainref;
|
||||
|
||||
my $file = find_file $chain;
|
||||
|
||||
if ( -f $file ) {
|
||||
progress_message "Processing $file...";
|
||||
|
||||
my @params = split /,/, $param;
|
||||
|
||||
unless ( my $return = eval `cat $file` ) {
|
||||
fatal_error "Couldn't parse $file: $@" if $@;
|
||||
fatal_error "Couldn't do $file: $!" unless defined $return;
|
||||
fatal_error "Couldn't run $file";
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
$chainref;
|
||||
}
|
||||
|
||||
sub createsimpleactionchain( $ ) {
|
||||
my $action = shift;
|
||||
|
||||
return createlogactionchain("$action:none::", $action, 'none', '', '' ) if $filter_table->{$action} || $nat_table->{$action};
|
||||
|
||||
my $chainref = new_standard_chain $action;
|
||||
|
||||
$usedactions{"$action:none::"} = $chainref;
|
||||
|
||||
$chainref->{action} = $action;
|
||||
|
||||
unless ( $targets{$action} & BUILTIN ) {
|
||||
|
||||
dont_optimize $chainref;
|
||||
|
||||
my $file = find_file $action;
|
||||
|
||||
if ( -f $file ) {
|
||||
progress_message "Processing $file...";
|
||||
|
||||
my ( $level, $tag ) = ( '', '' );
|
||||
|
||||
unless ( my $return = eval `cat $file` ) {
|
||||
fatal_error "Couldn't parse $file: $@" if $@;
|
||||
fatal_error "Couldn't do $file: $!" unless defined $return;
|
||||
fatal_error "Couldn't run $file";
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
$chainref;
|
||||
}
|
||||
|
||||
#
|
||||
# Create an action chain and run its associated user exit
|
||||
#
|
||||
sub createactionchain( $ ) {
|
||||
my $normalized = shift;
|
||||
|
||||
my ( $target, $level, $tag, $param ) = split /:/, $normalized;
|
||||
|
||||
assert( defined $param );
|
||||
|
||||
my $chainref;
|
||||
|
||||
if ( $level eq 'none' && $tag eq '' && $param eq '' ) {
|
||||
createsimpleactionchain $target;
|
||||
} else {
|
||||
createlogactionchain $normalized, $target , $level , $tag, $param;
|
||||
}
|
||||
}
|
||||
|
||||
#
|
||||
# Mark an action as used and create its chain. Returns one if the chain was
|
||||
# created on this call or 0 otherwise.
|
||||
#
|
||||
sub use_action( $ ) {
|
||||
my $normalized = shift;
|
||||
|
||||
if ( $usedactions{$normalized} ) {
|
||||
0;
|
||||
} else {
|
||||
createactionchain $normalized;
|
||||
}
|
||||
}
|
||||
|
||||
#
|
||||
# This function determines the logging and params for a subordinate action or a rule within a superior action
|
||||
#
|
||||
@ -379,9 +573,8 @@ sub process_action2( $ ) {
|
||||
sub process_actions2 () {
|
||||
progress_message2 "Pre-processing default actions...";
|
||||
|
||||
for my $action ( keys %usedactions ) {
|
||||
my ( $basic_action, undef, undef, undef ) = split /:/, $action;
|
||||
process_action2( $action ) unless $targets{$basic_action} & BUILTIN;
|
||||
for my $action ( map normalize_action_name $_, ( grep ! ( $targets{$_} & BUILTIN ), keys %policy_actions ) ) {
|
||||
process_action2( $action ) if use_action( $action );
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
Loading…
Reference in New Issue
Block a user