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authorAnton Tananaev <anton.tananaev@gmail.com>2013-09-06 21:30:32 +1200
committerAnton Tananaev <anton.tananaev@gmail.com>2013-09-06 21:30:32 +1200
commit36b23f0fe4ec1334102fa5d0a21d3692e9ce6da9 (patch)
tree62a6ab54697fef290633914440699cd3fa63062c /src/org/traccar/protocol
parent702acdd21ff7da9f583422f63ca67740fd06f439 (diff)
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Support Wondex keep alive (fix #380)
Diffstat (limited to 'src/org/traccar/protocol')
-rw-r--r--src/org/traccar/protocol/WondexFrameDecoder.java60
1 files changed, 60 insertions, 0 deletions
diff --git a/src/org/traccar/protocol/WondexFrameDecoder.java b/src/org/traccar/protocol/WondexFrameDecoder.java
new file mode 100644
index 000000000..7ef5cc376
--- /dev/null
+++ b/src/org/traccar/protocol/WondexFrameDecoder.java
@@ -0,0 +1,60 @@
+/*
+ * Copyright 2013 Anton Tananaev (anton.tananaev@gmail.com)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+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.traccar.helper.ChannelBufferTools;
+
+public class WondexFrameDecoder extends FrameDecoder {
+
+ private static final int KEEP_ALIVE_LENGTH = 6;
+
+ @Override
+ protected Object decode(
+ ChannelHandlerContext ctx,
+ Channel channel,
+ ChannelBuffer buf) throws Exception {
+
+ if (buf.readableBytes() < KEEP_ALIVE_LENGTH) {
+ return null;
+ }
+
+ if (buf.getUnsignedByte(buf.readerIndex()) == 0xD0) {
+
+ // Send response
+ ChannelBuffer frame = buf.readBytes(KEEP_ALIVE_LENGTH);
+ if (channel != null) {
+ channel.write(frame);
+ }
+
+ } else {
+
+ Integer index = ChannelBufferTools.find(buf, buf.readerIndex(), buf.readableBytes(), "\r\n");
+ if (index != null) {
+ ChannelBuffer frame = buf.readBytes(index - buf.readerIndex());
+ buf.skipBytes(2);
+ return frame;
+ }
+
+ }
+
+ return null;
+ }
+
+}