From b21072601254c0d726cce64c3170b1e6bf3bd87f Mon Sep 17 00:00:00 2001
From: justme1968 <justme1968@2b470e98-0d58-463d-a4d8-8e2adae1ed80>
Date: Sun, 28 Jul 2013 09:00:56 +0000
Subject: [PATCH] try to protect against malformated messages

git-svn-id: https://svn.fhem.de/fhem/trunk@3515 2b470e98-0d58-463d-a4d8-8e2adae1ed80
---
 fhem/FHEM/34_SWAP.pm | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/fhem/FHEM/34_SWAP.pm b/fhem/FHEM/34_SWAP.pm
index 832946763..b8f1f49d8 100755
--- a/fhem/FHEM/34_SWAP.pm
+++ b/fhem/FHEM/34_SWAP.pm
@@ -693,6 +693,8 @@ SWAP_Parse($$)
 {
   my ($hash, $msg) = @_;
 
+  return undef if( $msg !~ m/^[\dA-F]{12,}$/ );
+
   my $dest = substr($msg, 0, 2);
   my $src = substr($msg, 2, 2);
   my $hop = substr($msg, 4, 1);