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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;
import org.jboss.netty.buffer.ChannelBuffer;
import org.jboss.netty.channel.Channel;
import org.jboss.netty.channel.ChannelHandlerContext;
import org.jboss.netty.channel.ChannelPipeline;
import org.jboss.netty.channel.MessageEvent;
import org.jboss.netty.channel.SimpleChannelHandler;
import org.jboss.netty.handler.codec.frame.FrameDecoder;
import org.jboss.netty.handler.codec.string.StringDecoder;
import org.traccar.helper.Log;
import java.lang.reflect.Method;
import java.net.SocketAddress;
import java.util.List;
public class DetectorHandler extends SimpleChannelHandler {
private final List<TrackerServer> serverList;
private boolean showFailed;
DetectorHandler(List<TrackerServer> serverList) {
this.serverList = serverList;
}
public void checkPipeline(String protocol, ChannelPipeline pipeline, ChannelBuffer buf) throws Exception {
Object tmp = buf.duplicate();
// Frame decoder
FrameDecoder frameDecoder = (FrameDecoder) pipeline.get("frameDecoder");
if (frameDecoder != null) {
try {
Method method = frameDecoder.getClass().getDeclaredMethod(
"decode", ChannelHandlerContext.class, Channel.class, ChannelBuffer.class);
method.setAccessible(true);
tmp = method.invoke(frameDecoder, null, null, tmp);
} catch (NoSuchMethodException error) {
Method method = frameDecoder.getClass().getSuperclass().getDeclaredMethod(
"decode", ChannelHandlerContext.class, Channel.class, ChannelBuffer.class);
method.setAccessible(true);
tmp = method.invoke(frameDecoder, null, null, tmp);
}
}
// String decoder
if (pipeline.get("stringDecoder") != null) {
StringDecoder stringDecoder = new StringDecoder();
if (tmp != null) {
try {
Method method = stringDecoder.getClass().getDeclaredMethod(
"decode", ChannelHandlerContext.class, Channel.class, Object.class);
method.setAccessible(true);
tmp = method.invoke(stringDecoder, null, null, tmp);
} catch (NoSuchMethodException error) {
Method method = stringDecoder.getClass().getSuperclass().getDeclaredMethod(
"decode", ChannelHandlerContext.class, Channel.class, Object.class);
method.setAccessible(true);
tmp = method.invoke(stringDecoder, null, null, tmp);
}
}
}
// Protocol decoder
BaseProtocolDecoder protocolDecoder = (BaseProtocolDecoder) pipeline.get("objectDecoder");
if (tmp != null) {
try {
Method method = protocolDecoder.getClass().getDeclaredMethod(
"decode", ChannelHandlerContext.class, Channel.class, SocketAddress.class, Object.class);
method.setAccessible(true);
tmp = method.invoke(protocolDecoder, null, null, null, tmp);
} catch (NoSuchMethodException error) {
Method method = protocolDecoder.getClass().getSuperclass().getDeclaredMethod(
"decode", ChannelHandlerContext.class, Channel.class, SocketAddress.class, Object.class);
method.setAccessible(true);
tmp = method.invoke(protocolDecoder, null, null, null, tmp);
}
}
if (tmp != null) {
Log.info("Protocol " + protocol + " possible match");
} else if (showFailed) {
Log.info("Protocol " + protocol + " no match");
}
}
@Override
public void messageReceived(ChannelHandlerContext ctx, MessageEvent e) {
if (e.getMessage() instanceof ChannelBuffer) {
ChannelBuffer buf = (ChannelBuffer) e.getMessage();
for (TrackerServer server : serverList) {
try {
if (!server.getProtocol().equals("detector")) {
checkPipeline(server.getProtocol(), server.getPipelineFactory().getPipeline(), buf);
}
} catch (Exception error) {
if (showFailed) {
Log.info("Protocol " + server.getProtocol() + " error");
}
}
}
}
}
}
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