From 401b7d07fabea4b846d103c767f585b5ad46a144 Mon Sep 17 00:00:00 2001
From: Jochen Schalanda <jochen@schalanda.name>
Date: Thu, 18 Feb 2016 14:41:58 +0100
Subject: [PATCH] Add length check of UDP packet to UDPNetSyslogServer#run()

Fixes #5
---
 .../syslog4j/server/impl/net/udp/UDPNetSyslogServer.java  | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/src/main/java/org/graylog2/syslog4j/server/impl/net/udp/UDPNetSyslogServer.java b/src/main/java/org/graylog2/syslog4j/server/impl/net/udp/UDPNetSyslogServer.java
index de943ea..3b035af 100644
--- a/src/main/java/org/graylog2/syslog4j/server/impl/net/udp/UDPNetSyslogServer.java
+++ b/src/main/java/org/graylog2/syslog4j/server/impl/net/udp/UDPNetSyslogServer.java
@@ -81,10 +81,10 @@ public class UDPNetSyslogServer extends AbstractSyslogServer {
 
                 this.ds.receive(dp);
 
-                SyslogServerEventIF event = createEvent(this.getConfig(), receiveData, dp.getLength(), dp.getAddress());
-
-                handleEvent(null, this, dp, event);
-
+                if(dp.getLength() > 0) {
+                    SyslogServerEventIF event = createEvent(this.getConfig(), receiveData, dp.getLength(), dp.getAddress());
+                    handleEvent(null, this, dp, event);
+                }
             } catch (SocketException se) {
                 int i = se.getMessage() == null ? -1 : se.getMessage().toLowerCase().indexOf("socket closed");