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Ensure correct match ordering with trivial exclusion

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Signed-off-by: Tom Eastep <teastep@shorewall.net>
This commit is contained in:
Tom Eastep 2013-05-22 08:46:22 -07:00
parent 8df8fe990a
commit 9e77bb5499
1 changed files with 11 additions and 5 deletions
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16
Shorewall/Perl/Shorewall/Chains.pm
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@ -6876,10 +6876,12 @@ sub handle_original_dest( $$$ ) {
#
# Handles non-trivial exclusion. Updates the passed rule and returns ( $rule, $done )
#
sub handle_exclusion( $$$$$$$$$$$$$$$$$$$ ) {
sub handle_exclusion( $$$$$$$$$$$$$$$$$$$$$ ) {
my ( $disposition,
$table,
$prerule,
$sprerule,
$dprerule,
$rule,
$restriction,
$inets,
@ -6961,7 +6963,7 @@ sub handle_exclusion( $$$$$$$$$$$$$$$$$$$ ) {
for my $dnet ( split_host_list( $dnets, $config{DEFER_DNS_RESOLUTION} ) ) {
$source_match = match_source_net( $inet, $restriction, $mac ) unless $globals{KLUDGEFREE};
add_expanded_jump( $chainref, $echainref, 0, join( '', $prerule, $source_match, match_dest_net( $dnet, $restriction ), $onet, $rule ) );
add_expanded_jump( $chainref, $echainref, 0, join( '', $prerule, $source_match, $sprerule, match_dest_net( $dnet, $restriction ), $dprerule, $onet, $rule ) );
}
conditional_rule_end( $chainref ) if $cond;
@ -7109,13 +7111,15 @@ sub expand_rule( $$$$$$$$$$$;$ )
#
# Determine if there is Source Exclusion
#
my ( $sprerule, $dprerule ) = ( '', '' );
if ( $inets ) {
( $inets, $iexcl ) = handle_network_list( $inets, 'SOURCE' );
unless ( $inets || $iexcl =~ /^\+\[/ || ( $iiface && $restriction & POSTROUTE_RESTRICT ) ) {
my @iexcl = split_host_list( $iexcl, $deferdns, 1 );
if ( @iexcl == 1 ) {
$rule .= match_source_net "!$iexcl" , $restriction;
$sprerule = match_source_net "!$iexcl" , $restriction;
$iexcl = '';
$trivialiexcl = 1;
}
@ -7130,7 +7134,7 @@ sub expand_rule( $$$$$$$$$$$;$ )
unless ( $dnets || $dexcl =~ /^\+\[/ ) {
my @dexcl = split_host_list( $dexcl, $deferdns, 1 );
if ( @dexcl == 1 ) {
$rule .= match_dest_net "!$dexcl", $restriction;
$dprerule = match_dest_net "!$dexcl", $restriction;
$dexcl = '';
$trivialdexcl = 1;
}
@ -7153,6 +7157,8 @@ sub expand_rule( $$$$$$$$$$$;$ )
( $rule, $done ) = handle_exclusion( $disposition,
$table,
$prerule,
$sprerule,
$dprerule,
$rule,
$restriction,
$inets,
@ -7190,7 +7196,7 @@ sub expand_rule( $$$$$$$$$$$;$ )
for my $dnet ( split_host_list( $dnets, $deferdns ) ) {
$source_match = match_source_net( $inet, $restriction, $mac ) unless $globals{KLUDGEFREE};
my $dest_match = match_dest_net( $dnet, $restriction );
my $matches = join( '', $source_match, $dest_match, $onet, $rule );
my $matches = join( '', $source_match, $sprerule, $dest_match, $dprerule, $onet, $rule );
my $cond3 = conditional_rule( $chainref, $dnet );