From 237c80296fe947c6857c9509ba1b947ed02b354f Mon Sep 17 00:00:00 2001 From: Anton Tananaev Date: Wed, 2 Aug 2017 07:52:33 +1200 Subject: Implement TLV communication protocol --- src/org/traccar/protocol/TlvProtocolDecoder.java | 109 +++++++++++++++++++++++ 1 file changed, 109 insertions(+) create mode 100644 src/org/traccar/protocol/TlvProtocolDecoder.java (limited to 'src/org/traccar/protocol/TlvProtocolDecoder.java') diff --git a/src/org/traccar/protocol/TlvProtocolDecoder.java b/src/org/traccar/protocol/TlvProtocolDecoder.java new file mode 100644 index 000000000..41d65be09 --- /dev/null +++ b/src/org/traccar/protocol/TlvProtocolDecoder.java @@ -0,0 +1,109 @@ +/* + * Copyright 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. + * 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.buffer.ChannelBuffers; +import org.jboss.netty.channel.Channel; +import org.traccar.BaseProtocolDecoder; +import org.traccar.DeviceSession; +import org.traccar.helper.UnitsConverter; +import org.traccar.model.Position; + +import java.net.SocketAddress; +import java.nio.charset.StandardCharsets; +import java.util.Date; + +public class TlvProtocolDecoder extends BaseProtocolDecoder { + + public TlvProtocolDecoder(TlvProtocol protocol) { + super(protocol); + } + + private void sendResponse(Channel channel, String type, String... arguments) { + if (channel != null) { + ChannelBuffer response = ChannelBuffers.dynamicBuffer(); + response.writeBytes(ChannelBuffers.copiedBuffer(type, StandardCharsets.US_ASCII)); + for (String argument : arguments) { + response.writeByte(argument.length()); + response.writeBytes(ChannelBuffers.copiedBuffer(argument, StandardCharsets.US_ASCII)); + } + response.writeByte(0); + channel.write(response); + } + } + + private String readArgument(ChannelBuffer buf) { + return buf.readBytes(buf.readUnsignedByte()).toString(StandardCharsets.US_ASCII); + } + + @Override + protected Object decode( + Channel channel, SocketAddress remoteAddress, Object msg) throws Exception { + + ChannelBuffer buf = (ChannelBuffer) msg; + + String type = buf.readBytes(2).toString(StandardCharsets.US_ASCII); + + if (channel != null) { + switch (type) { + case "0A": + case "0C": + sendResponse(channel, type); + break; + case "0B": + sendResponse(channel, type, "1482202689", "10", "20", "15"); + break; + case "0E": + case "0F": + sendResponse(channel, type, "30", "Unknown"); + break; + default: + break; + } + } + + if (type.equals("0E")) { + + DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, readArgument(buf)); + if (deviceSession == null) { + return null; + } + + Position position = new Position(); + position.setProtocol(getProtocolName()); + position.setDeviceId(deviceSession.getDeviceId()); + + position.setValid(true); + position.setTime(new Date(Long.parseLong(readArgument(buf)) * 1000)); + + readArgument(buf); // location identifier + + position.setLongitude(Double.parseDouble(readArgument(buf))); + position.setLatitude(Double.parseDouble(readArgument(buf))); + position.setSpeed(UnitsConverter.knotsFromKph(Double.parseDouble(readArgument(buf)))); + position.setCourse(Double.parseDouble(readArgument(buf))); + + position.set(Position.KEY_SATELLITES, Integer.parseInt(readArgument(buf))); + + return position; + + } + + return null; + } + +} -- cgit v1.2.3