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authorAnton Tananaev <anton.tananaev@gmail.com>2015-02-28 12:09:43 +1300
committerAnton Tananaev <anton.tananaev@gmail.com>2015-02-28 12:09:43 +1300
commit183273d381c132ff657416b6530a193dac157b0d (patch)
tree53b75c2902e3e00a0bc532221d2cab319aa26aab /src/org/traccar/protocol/BceFrameDecoder.java
parentf872b2072cfd35c51a94efc5b93b91e46129d48e (diff)
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Begin BCE implementation
Diffstat (limited to 'src/org/traccar/protocol/BceFrameDecoder.java')
-rw-r--r--src/org/traccar/protocol/BceFrameDecoder.java47
1 files changed, 47 insertions, 0 deletions
diff --git a/src/org/traccar/protocol/BceFrameDecoder.java b/src/org/traccar/protocol/BceFrameDecoder.java
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+++ b/src/org/traccar/protocol/BceFrameDecoder.java
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+/*
+ * Copyright 2015 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.LengthFieldBasedFrameDecoder;
+
+public class BceFrameDecoder extends LengthFieldBasedFrameDecoder {
+
+ private static final int HANDSHAKE_LENGTH = 7; // "#BCE#\r\n"
+
+ private boolean header = true;
+
+ public BceFrameDecoder() {
+ super(1024, 8, 2);
+ }
+
+ @Override
+ protected Object decode(
+ ChannelHandlerContext ctx,
+ Channel channel,
+ ChannelBuffer buf) throws Exception {
+
+ if (header && buf.readableBytes() >= HANDSHAKE_LENGTH) {
+ buf.skipBytes(HANDSHAKE_LENGTH);
+ header = false;
+ }
+
+ return super.decode(ctx, channel, buf);
+ }
+
+}