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git-svn-id: https://shorewall.svn.sourceforge.net/svnroot/shorewall/trunk@5549 fbd18981-670d-0410-9b5c-8dc0c1a9a2bb
119 lines
2.9 KiB
Perl
119 lines
2.9 KiB
Perl
#
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# Shorewall 3.9 -- /usr/share/shorewall/Shorewall/Macros.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::Macros;
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require Exporter;
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use Shorewall::Common;
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use Shorewall::Config;
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use Shorewall::Zones;
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use Shorewall::Chains;
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use strict;
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our @ISA = qw(Exporter);
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our @EXPORT = qw( find_macro
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expand_shell_variables
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substitute_action
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merge_macro_source_dest
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merge_macro_column
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%macros );
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our @EXPORT_OK = qw( );
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our @VERSION = 1.00;
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our %macros;
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#
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# Try to find a macro file -- RETURNS false if the file doesn't exist or MACRO if it does.
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# If the file exists, the macro is entered into the 'targets' table and the fully-qualified
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# name of the file is stored in the 'macro' table.
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#
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sub find_macro( $ )
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{
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my $macro = $_[0];
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my $macrofile = find_file "macro.$macro";
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if ( -f $macrofile ) {
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$macros{$macro} = $macrofile;
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$targets{$macro} = MACRO;
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}
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}
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#
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# Macro and action files can have shell variables embedded. This function expands them from %ENV.
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#
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sub expand_shell_variables( $ ) {
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my $line = $_[0]; $line = $1 . ( $ENV{$2} || '' ) . $3 while $line =~ /^(.*?)\$([a-zA-Z]\w*)(.*)$/; $line;
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}
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# This function substitutes the second argument for the first part of the first argument up to the first colon (":")
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#
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# Example:
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#
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# substitute_action DNAT PARAM:info:FTP
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#
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# produces "DNAT:info:FTP"
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#
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sub substitute_action( $$ ) {
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my ( $param, $action ) = @_;
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if ( $action =~ /:/ ) {
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my $logpart = (split_action $action)[1];
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$logpart =~ s!/$!!;
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return "$param:$logpart";
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}
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$param;
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}
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#
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# Combine fields from a macro body with one from the macro invocation
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#
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sub merge_macro_source_dest( $$ ) {
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my ( $body, $invocation ) = @_;
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if ( $invocation ) {
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if ( $body ) {
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return $body if $invocation eq '-';
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return "$body:$invocation" if $invocation =~ /.*?\.*?\.|^\+|^~|^!~/;
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return "$invocation:$body";
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}
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}
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$body || '';
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}
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sub merge_macro_column( $$ ) {
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my ( $body, $invocation ) = @_;
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if ( $invocation ) {
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return ( $body || '') if $invocation eq '-';
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$invocation || '';
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} else {
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$body || '';
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}
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}
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1;
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