/* * 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.*; 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 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"); } } } } } }