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-rw-r--r--src/org/traccar/protocol/Gt06ProtocolDecoder.java6
1 files changed, 5 insertions, 1 deletions
diff --git a/src/org/traccar/protocol/Gt06ProtocolDecoder.java b/src/org/traccar/protocol/Gt06ProtocolDecoder.java
index 7bc0923cd..b3a69c274 100644
--- a/src/org/traccar/protocol/Gt06ProtocolDecoder.java
+++ b/src/org/traccar/protocol/Gt06ProtocolDecoder.java
@@ -83,7 +83,11 @@ public class Gt06ProtocolDecoder extends BaseProtocolDecoder {
ChannelBuffer buf = (ChannelBuffer) msg;
- buf.skipBytes(2); // header
+ // Check header
+ if (buf.readByte() != 0x78 || buf.readByte() != 0x78) {
+ return null;
+ }
+
int length = buf.readByte(); // size
int dataLength = length - 5;