From fc0a26137fbd00339fcbf28b10b2afae6242d094 Mon Sep 17 00:00:00 2001
From: Anton Tananaev <anton.tananaev@gmail.com>
Date: Thu, 21 Jan 2016 22:19:20 +1300
Subject: Fix Ulbotech frame and protocol decoders

---
 src/org/traccar/protocol/UlbotechProtocolDecoder.java | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

(limited to 'src/org/traccar/protocol/UlbotechProtocolDecoder.java')

diff --git a/src/org/traccar/protocol/UlbotechProtocolDecoder.java b/src/org/traccar/protocol/UlbotechProtocolDecoder.java
index 712444d95..3dc5b36cb 100644
--- a/src/org/traccar/protocol/UlbotechProtocolDecoder.java
+++ b/src/org/traccar/protocol/UlbotechProtocolDecoder.java
@@ -101,7 +101,10 @@ public class UlbotechProtocolDecoder extends BaseProtocolDecoder {
 
         ChannelBuffer buf = (ChannelBuffer) msg;
 
-        buf.readByte(); // header
+        if (buf.readUnsignedByte() != 0xF8) {
+            return null;
+        }
+
         buf.readUnsignedByte(); // version
         buf.readUnsignedByte(); // type
 
@@ -218,6 +221,7 @@ public class UlbotechProtocolDecoder extends BaseProtocolDecoder {
         if (hasLocation) {
             return position;
         }
+
         return null;
     }
 
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