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authorAnton Tananaev <anton.tananaev@gmail.com>2017-01-12 02:29:56 +1300
committerAnton Tananaev <anton.tananaev@gmail.com>2017-01-12 01:29:56 +1300
commitc03df5359224d86c8d1069872ddae52c0c35c225 (patch)
tree26f27d1fae6220bfd4b57806ad4a8bc7114d6166 /src/org/traccar/protocol/At2000FrameDecoder.java
parente54122e22725bae7a962d58e06a497526aed46cb (diff)
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Acknowledge AT2000 message fragments
Diffstat (limited to 'src/org/traccar/protocol/At2000FrameDecoder.java')
-rw-r--r--src/org/traccar/protocol/At2000FrameDecoder.java21
1 files changed, 20 insertions, 1 deletions
diff --git a/src/org/traccar/protocol/At2000FrameDecoder.java b/src/org/traccar/protocol/At2000FrameDecoder.java
index d0be3f5f4..4c849afb7 100644
--- a/src/org/traccar/protocol/At2000FrameDecoder.java
+++ b/src/org/traccar/protocol/At2000FrameDecoder.java
@@ -1,5 +1,5 @@
/*
- * Copyright 2016 Anton Tananaev (anton@traccar.org)
+ * Copyright 2016 - 2017 Anton Tananaev (anton@traccar.org)
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
@@ -16,16 +16,31 @@
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;
+import java.nio.ByteOrder;
+
public class At2000FrameDecoder extends FrameDecoder {
private static final int BLOCK_LENGTH = 16;
+ private static final int ACK_LENGTH = 496;
private boolean firstPacket = true;
+ private void sendResponse(Channel channel) {
+ if (channel != null) {
+ ChannelBuffer response = ChannelBuffers.directBuffer(ByteOrder.LITTLE_ENDIAN, 2 * BLOCK_LENGTH);
+ response.writeByte(At2000ProtocolDecoder.MSG_ACKNOWLEDGEMENT);
+ response.writeMedium(ChannelBuffers.swapMedium(1));
+ response.writeByte(0x00); // success
+ response.writerIndex(2 * BLOCK_LENGTH);
+ channel.write(response);
+ }
+ }
+
@Override
protected Object decode(
ChannelHandlerContext ctx, Channel channel, ChannelBuffer buf) throws Exception {
@@ -47,6 +62,10 @@ public class At2000FrameDecoder extends FrameDecoder {
length = (length / BLOCK_LENGTH + 1) * BLOCK_LENGTH;
}
+ if (buf.readableBytes() >= length || buf.readableBytes() % ACK_LENGTH == 0) {
+ sendResponse(channel);
+ }
+
if (buf.readableBytes() >= length) {
return buf.readBytes(length);
}