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authorAnton Tananaev <anton.tananaev@gmail.com>2016-10-20 16:32:24 +1300
committerAnton Tananaev <anton.tananaev@gmail.com>2016-10-20 16:32:24 +1300
commitf64840b9e85d4869c92e9f20a2f5043522ad4008 (patch)
treef2cc0e4f7c893ebbc7313adaa3ea656b1c0ea7c8 /src/org/traccar
parent23e11715cc6f5e94002123293a1108a48044316e (diff)
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Use heuristics for H02 message length
Diffstat (limited to 'src/org/traccar')
-rw-r--r--src/org/traccar/protocol/H02FrameDecoder.java16
-rw-r--r--src/org/traccar/protocol/H02Protocol.java2
2 files changed, 14 insertions, 4 deletions
diff --git a/src/org/traccar/protocol/H02FrameDecoder.java b/src/org/traccar/protocol/H02FrameDecoder.java
index feba8033d..2a005e760 100644
--- a/src/org/traccar/protocol/H02FrameDecoder.java
+++ b/src/org/traccar/protocol/H02FrameDecoder.java
@@ -22,6 +22,9 @@ import org.jboss.netty.handler.codec.frame.FrameDecoder;
public class H02FrameDecoder extends FrameDecoder {
+ private static final int MESSAGE_SHORT = 32;
+ private static final int MESSAGE_LONG = 45;
+
private int messageLength;
public H02FrameDecoder(int messageLength) {
@@ -49,10 +52,17 @@ public class H02FrameDecoder extends FrameDecoder {
return buf.readBytes(index + 1 - buf.readerIndex());
}
- } else if (marker == '$' && buf.readableBytes() >= messageLength) {
+ } else if (marker == '$') {
- // Return binary message
- return buf.readBytes(messageLength);
+ if (messageLength > 0 && buf.readableBytes() >= messageLength) {
+ return buf.readBytes(messageLength);
+ } else if (buf.readableBytes() >= MESSAGE_SHORT) {
+ if (buf.getUnsignedByte(buf.readerIndex() + MESSAGE_SHORT - 1) == 0) {
+ return buf.readBytes(MESSAGE_SHORT);
+ } else if (buf.readableBytes() >= MESSAGE_LONG) {
+ return buf.readBytes(MESSAGE_LONG);
+ }
+ }
}
diff --git a/src/org/traccar/protocol/H02Protocol.java b/src/org/traccar/protocol/H02Protocol.java
index 06ac2a6fa..089721aed 100644
--- a/src/org/traccar/protocol/H02Protocol.java
+++ b/src/org/traccar/protocol/H02Protocol.java
@@ -43,7 +43,7 @@ public class H02Protocol extends BaseProtocol {
serverList.add(new TrackerServer(new ServerBootstrap(), getName()) {
@Override
protected void addSpecificHandlers(ChannelPipeline pipeline) {
- int messageLength = Context.getConfig().getInteger(getName() + ".messageLength", 32);
+ int messageLength = Context.getConfig().getInteger(getName() + ".messageLength");
pipeline.addLast("frameDecoder", new H02FrameDecoder(messageLength));
pipeline.addLast("stringEncoder", new StringEncoder());
pipeline.addLast("objectEncoder", new H02ProtocolEncoder());