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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 java.net.SocketAddress;
import java.nio.charset.Charset;
import java.util.Date;
import java.util.LinkedList;
import java.util.List;
import org.jboss.netty.buffer.ChannelBuffer;
import org.jboss.netty.buffer.ChannelBuffers;
import org.jboss.netty.channel.Channel;
import org.jboss.netty.channel.ChannelHandlerContext;
import org.traccar.BaseProtocolDecoder;
import org.traccar.helper.ChannelBufferTools;
import org.traccar.model.Event;
import org.traccar.model.Position;
public class TytanProtocolDecoder extends BaseProtocolDecoder {
public TytanProtocolDecoder(String protocol) {
super(protocol);
}
@Override
protected Object decode(
ChannelHandlerContext ctx, Channel channel, SocketAddress remoteAddress, Object msg)
throws Exception {
ChannelBuffer buf = (ChannelBuffer) msg;
buf.readUnsignedByte(); // protocol
int index = buf.readUnsignedByte() >> 3;
if (channel != null) {
ChannelBuffer response = ChannelBuffers.copiedBuffer(
"^" + index, Charset.defaultCharset());
channel.write(response, remoteAddress);
}
String id = String.valueOf(buf.readUnsignedInt());
if (!identify(id)) {
return null;
}
List<Position> positions = new LinkedList<Position>();
while (buf.readable()) {
Position position = new Position();
position.setProtocol(getProtocol());
position.setDeviceId(getDeviceId());
int end = buf.readerIndex() + buf.readUnsignedByte();
position.setTime(new Date(buf.readUnsignedInt() * 1000));
int flags = buf.readUnsignedByte();
position.set(Event.KEY_GPS, flags >> 5);
position.set(Event.KEY_GSM, flags & 0x07);
position.setValid(((flags & 0x08) != 0) ^ ((flags & 0x10) != 0));
// Latitude
double lat = buf.readUnsignedMedium();
lat = lat * -180 / 16777216 + 90;
position.setLatitude(lat);
// Longitude
double lon = buf.readUnsignedMedium();
lon = lon * 360 / 16777216 - 180;
position.setLongitude(lon);
// Course
int course = (buf.readUnsignedByte() >> 5) * 45;
course = (course + 180) % 360;
position.setCourse(course);
// Speed
int speed = buf.readUnsignedByte();
if (speed < 250) {
position.setSpeed(speed * 0.539957);
}
while (buf.readerIndex() < end) {
switch (buf.readUnsignedByte()) {
case 2:
position.set(Event.KEY_ODOMETER, buf.readUnsignedMedium());
break;
case 4:
buf.readUnsignedShort(); // device start
break;
case 5:
position.set(Event.KEY_INPUT, buf.readUnsignedByte());
break;
case 6:
buf.readUnsignedShort();
position.set(Event.PREFIX_ADC + 1, buf.readFloat());
break;
case 7:
position.set(Event.KEY_ALARM, buf.readUnsignedShort());
break;
case 8:
position.set("antihijack", buf.readUnsignedByte());
break;
case 9:
position.set("authorized", ChannelBufferTools.readHexString(buf, 16));
break;
case 10:
position.set("unauthorized", ChannelBufferTools.readHexString(buf, 16));
break;
case 24:
buf.readUnsignedByte();
position.set(Event.PREFIX_TEMP + 1, buf.readUnsignedByte());
break;
case 25:
buf.readUnsignedByte();
buf.readUnsignedShort(); // fuel
break;
case 26:
buf.skipBytes(buf.readUnsignedByte() * 2); // flowmeter
break;
case 28:
position.set("weight", buf.readUnsignedShort());
buf.readUnsignedByte();
break;
case 29:
buf.readUnsignedByte(); // diagnostics
break;
case 30:
buf.readUnsignedByte(); // vending machine
buf.readUnsignedInt();
buf.readUnsignedInt();
buf.readUnsignedInt();
break;
case 31:
buf.readUnsignedByte(); // antihijack
break;
case 32:
buf.readUnsignedByte(); // audio
break;
case 33:
buf.readUnsignedByte(); // antihijack and authorization
break;
case 80:
case 81:
case 82:
case 83:
buf.readUnsignedInt(); // diagnostic
break;
case 90:
position.set(Event.KEY_POWER, buf.readFloat());
break;
case 99:
buf.readUnsignedInt(); // tachograph
break;
case 101:
buf.readUnsignedByte(); // speed
break;
case 102:
buf.readUnsignedByte(); // engine rpm
break;
case 103:
buf.readUnsignedByte(); // engine temperature
break;
case 104:
buf.readUnsignedByte(); // pedal position
break;
case 105:
buf.readUnsignedByte(); // engine load
break;
case 107:
position.set(Event.KEY_FUEL, buf.readUnsignedShort() & 0x3fff);
break;
case 108:
buf.readUnsignedInt(); // total distance
break;
case 109:
buf.readUnsignedByte(); // ambient temperature
break;
case 122:
buf.readUnsignedByte(); // power take-off state
break;
case 127:
buf.readUnsignedInt(); // total fuel used
break;
case 129:
buf.readUnsignedInt(); // engine total hours
break;
case 130:
buf.readUnsignedShort(); // distance to service
break;
case 131:
buf.readUnsignedShort(); // axle weight
buf.readUnsignedShort();
buf.readUnsignedShort();
buf.readUnsignedShort();
break;
case 136:
buf.readUnsignedShort(); // fuel rate
break;
case 150:
position.set("door", buf.readUnsignedByte());
break;
}
}
positions.add(position);
}
return positions;
}
}
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