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-rw-r--r--src/org/traccar/protocol/TotemFrameDecoder.java32
1 files changed, 16 insertions, 16 deletions
diff --git a/src/org/traccar/protocol/TotemFrameDecoder.java b/src/org/traccar/protocol/TotemFrameDecoder.java
index 6f7c3a37c..0b1a3e7c2 100644
--- a/src/org/traccar/protocol/TotemFrameDecoder.java
+++ b/src/org/traccar/protocol/TotemFrameDecoder.java
@@ -19,7 +19,8 @@ import java.nio.charset.Charset;
import org.jboss.netty.buffer.ChannelBuffer;
import org.jboss.netty.channel.Channel;
import org.jboss.netty.channel.ChannelHandlerContext;
-import org.jboss.netty.handler.codec.frame.FrameDecoder;
+import org.jboss.netty.handler.codec.frame.FrameDecoder;
+import org.traccar.helper.ChannelBufferTools;
public class TotemFrameDecoder extends FrameDecoder {
@@ -28,27 +29,26 @@ public class TotemFrameDecoder extends FrameDecoder {
ChannelHandlerContext ctx,
Channel channel,
ChannelBuffer buf) throws Exception {
-
+
// Check minimum length
if (buf.readableBytes() < 10) {
return null;
}
-
- // Trim end line
- if (buf.getUnsignedShort(buf.readerIndex()) == 0x0d0a) {
- buf.skipBytes(2);
+
+ // Find start
+ Integer beginIndex = ChannelBufferTools.find(buf, buf.readerIndex(), "$$");
+ if (beginIndex == null) {
+ return null;
+ } else if (beginIndex > buf.readerIndex()) {
+ buf.readerIndex(beginIndex);
}
-
- if(buf.toString(buf.readerIndex(), 2, Charset.defaultCharset()).equals("$$")){
- int length = Integer.parseInt(buf.toString(buf.readerIndex() + 2, 2, Charset.defaultCharset()), 16);
- if (length <= buf.readableBytes()) {
- return buf.readBytes(length);
- }
- }else{
- //TODO: notify to user the GPS response
- return buf.readBytes(buf.readableBytes());
+
+ // Read message
+ int length = Integer.parseInt(buf.toString(buf.readerIndex() + 2, 2, Charset.defaultCharset()), 16);
+ if (length <= buf.readableBytes()) {
+ return buf.readBytes(length);
}
-
+
return null;
}