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-rw-r--r--src/main/java/org/traccar/protocol/Jt600FrameDecoder.java2
-rw-r--r--src/main/java/org/traccar/protocol/Jt600ProtocolDecoder.java8
2 files changed, 5 insertions, 5 deletions
diff --git a/src/main/java/org/traccar/protocol/Jt600FrameDecoder.java b/src/main/java/org/traccar/protocol/Jt600FrameDecoder.java
index bfefb94a7..f7890f814 100644
--- a/src/main/java/org/traccar/protocol/Jt600FrameDecoder.java
+++ b/src/main/java/org/traccar/protocol/Jt600FrameDecoder.java
@@ -35,7 +35,7 @@ public class Jt600FrameDecoder extends BaseFrameDecoder {
char type = (char) buf.getByte(buf.readerIndex());
if (type == '$') {
- boolean longFormat = Jt600ProtocolDecoder.isLongFormat(buf, buf.readerIndex() + 1);
+ boolean longFormat = Jt600ProtocolDecoder.isLongFormat(buf);
int length = buf.getUnsignedShort(buf.readerIndex() + (longFormat ? 8 : 7)) + 10;
if (length <= buf.readableBytes()) {
return buf.readRetainedSlice(length);
diff --git a/src/main/java/org/traccar/protocol/Jt600ProtocolDecoder.java b/src/main/java/org/traccar/protocol/Jt600ProtocolDecoder.java
index 9ed44f565..dc763dea7 100644
--- a/src/main/java/org/traccar/protocol/Jt600ProtocolDecoder.java
+++ b/src/main/java/org/traccar/protocol/Jt600ProtocolDecoder.java
@@ -86,8 +86,8 @@ public class Jt600ProtocolDecoder extends BaseProtocolDecoder {
}
- static boolean isLongFormat(ByteBuf buf, int flagIndex) {
- return buf.getUnsignedByte(flagIndex) >> 4 >= 7;
+ static boolean isLongFormat(ByteBuf buf) {
+ return buf.getUnsignedByte(buf.readerIndex() + 8) == 0;
}
static void decodeBinaryLocation(ByteBuf buf, Position position) {
@@ -123,9 +123,9 @@ public class Jt600ProtocolDecoder extends BaseProtocolDecoder {
List<Position> positions = new LinkedList<>();
- buf.readByte(); // header
+ boolean longFormat = isLongFormat(buf);
- boolean longFormat = isLongFormat(buf, buf.readerIndex());
+ buf.readByte(); // header
String id = String.valueOf(Long.parseLong(ByteBufUtil.hexDump(buf.readSlice(5))));
DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, id);