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-rw-r--r--src/org/traccar/protocol/HuaShengFrameDecoder.java19
1 files changed, 18 insertions, 1 deletions
diff --git a/src/org/traccar/protocol/HuaShengFrameDecoder.java b/src/org/traccar/protocol/HuaShengFrameDecoder.java
index 5d68fef9e..0e1becc30 100644
--- a/src/org/traccar/protocol/HuaShengFrameDecoder.java
+++ b/src/org/traccar/protocol/HuaShengFrameDecoder.java
@@ -16,6 +16,7 @@
package org.traccar.protocol;
import org.jboss.netty.buffer.ChannelBuffer;
+import org.jboss.netty.buffer.ChannelBuffers;
import org.jboss.netty.channel.Channel;
import org.jboss.netty.channel.ChannelHandlerContext;
import org.jboss.netty.handler.codec.frame.FrameDecoder;
@@ -34,7 +35,23 @@ public class HuaShengFrameDecoder extends FrameDecoder {
int index = buf.indexOf(buf.readerIndex() + 1, buf.writerIndex(), (byte) 0xC0);
if (index != -1) {
- return buf.readBytes(index + 1 - buf.readerIndex());
+ ChannelBuffer result = ChannelBuffers.buffer(index + 1 - buf.readerIndex());
+
+ while (buf.readerIndex() <= index) {
+ int b = buf.readUnsignedByte();
+ if (b == 0xDB) {
+ int ext = buf.readUnsignedByte();
+ if (ext == 0xDC) {
+ result.writeByte(0xC0);
+ } else if (ext == 0xDD) {
+ result.writeByte(0xDB);
+ }
+ } else {
+ result.writeByte(b);
+ }
+ }
+
+ return result;
}
return null;