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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 org.jboss.netty.buffer.ChannelBuffer;
import org.jboss.netty.buffer.ChannelBuffers;
import org.jboss.netty.channel.Channel;
import org.traccar.BaseProtocolDecoder;
import org.traccar.Context;
import org.traccar.helper.BitUtil;
import org.traccar.helper.ChannelBufferTools;
import org.traccar.helper.UnitsConverter;
import org.traccar.model.Event;
import org.traccar.model.Position;
public class UlbotechProtocolDecoder extends BaseProtocolDecoder {
private final long timeZone;
public UlbotechProtocolDecoder(UlbotechProtocol protocol) {
super(protocol);
timeZone = Context.getConfig().getInteger(getProtocolName() + ".timezone", 0);
}
private static final short DATA_GPS = 0x01;
private static final short DATA_LBS = 0x02;
private static final short DATA_STATUS = 0x03;
private static final short DATA_ODOMETER = 0x04;
private static final short DATA_ADC = 0x05;
private static final short DATA_GEOFENCE = 0x06;
private static final short DATA_OBD2 = 0x07;
private static final short DATA_FUEL = 0x08;
private static final short DATA_OBD2_ALARM = 0x09;
private static final short DATA_HARSH_DRIVER = 0x0A;
private static final short DATA_CANBUS = 0x0B;
private static final short DATA_J1708 = 0x0C;
private static final short DATA_VIN = 0x0D;
private static final short DATA_RFID = 0x0E;
private static final short DATA_EVENT = 0x10;
@Override
protected Object decode(
Channel channel, SocketAddress remoteAddress, Object msg)
throws Exception {
ChannelBuffer buf = (ChannelBuffer) msg;
buf.readByte(); // header
buf.readUnsignedByte(); // version
buf.readUnsignedByte(); // type
// Create new position
Position position = new Position();
position.setProtocol(getProtocolName());
// Get device id
String imei = ChannelBufferTools.readHexString(buf, 16).substring(1);
if (!identify(imei, channel)) {
return null;
}
position.setDeviceId(getDeviceId());
// Time
long seconds = buf.readUnsignedInt() & 0x7fffffffl;
seconds += 946684800l; // 2000-01-01 00:00
seconds -= timeZone;
position.setTime(new Date(seconds * 1000));
boolean hasLocation = false;
while (buf.readableBytes() > 3) {
short type = buf.readUnsignedByte();
short length = buf.readUnsignedByte();
switch (type) {
case DATA_GPS:
hasLocation = true;
position.setValid(true);
position.setLatitude(buf.readInt() / 1000000.0);
position.setLongitude(buf.readInt() / 1000000.0);
position.setSpeed(UnitsConverter.knotsFromKph(buf.readUnsignedShort()));
position.setCourse(buf.readUnsignedShort());
position.set(Event.KEY_HDOP, buf.readUnsignedShort());
break;
case DATA_LBS:
position.set(Event.KEY_MCC, buf.readUnsignedShort());
position.set(Event.KEY_MNC, buf.readUnsignedByte());
position.set(Event.KEY_LAC, buf.readUnsignedShort());
position.set(Event.KEY_CELL, buf.readUnsignedShort());
position.set(Event.KEY_GSM, -buf.readUnsignedByte());
break;
case DATA_STATUS:
int status = buf.readUnsignedShort();
position.set(Event.KEY_IGNITION, BitUtil.check(status, 6));
position.set(Event.KEY_STATUS, status);
position.set(Event.KEY_ALARM, buf.readUnsignedShort());
break;
case DATA_ODOMETER:
position.set(Event.KEY_ODOMETER, buf.readUnsignedInt());
break;
case DATA_ADC:
for (int i = 0; i < length / 2; i++) {
int value = buf.readUnsignedShort();
position.set(Event.PREFIX_ADC + BitUtil.range(value, 12), BitUtil.range(value, 0, 12));
}
break;
case DATA_GEOFENCE:
position.set("geofence-in", buf.readUnsignedInt());
position.set("geofence-alarm", buf.readUnsignedInt());
break;
case DATA_OBD2:
position.set("obd", ChannelBuffers.hexDump(buf.readBytes(length)));
break;
case DATA_FUEL:
position.set("fuel-consumption", buf.readUnsignedInt() / 10000.0);
break;
case DATA_OBD2_ALARM:
position.set("obd-alarm", ChannelBuffers.hexDump(buf.readBytes(length)));
break;
case DATA_HARSH_DRIVER:
position.set("driver-behavior", buf.readUnsignedByte());
break;
case DATA_CANBUS:
position.set("can", ChannelBuffers.hexDump(buf.readBytes(length)));
break;
case DATA_J1708:
position.set("j1708", ChannelBuffers.hexDump(buf.readBytes(length)));
break;
case DATA_VIN:
position.set("vin", buf.readBytes(length).toString(Charset.defaultCharset()));
break;
case DATA_RFID:
position.set(Event.KEY_RFID, buf.readBytes(length - 1).toString(Charset.defaultCharset()));
position.set("authorized", buf.readUnsignedByte() != 0);
break;
case DATA_EVENT:
position.set(Event.KEY_EVENT, buf.readUnsignedByte());
position.set("event-mask", buf.readUnsignedInt());
break;
default:
buf.skipBytes(length);
break;
}
}
if (hasLocation) {
return position;
}
return null;
}
}
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