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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 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.BitUtil;
import org.traccar.helper.DateBuilder;
import org.traccar.model.Position;
import java.net.SocketAddress;
public class TzoneProtocolDecoder extends BaseProtocolDecoder {
public TzoneProtocolDecoder(TzoneProtocol protocol) {
super(protocol);
}
private String decodeAlarm(Short value) {
switch (value) {
case 0x01:
return Position.ALARM_SOS;
case 0x10:
return Position.ALARM_LOW_BATTERY;
case 0x11:
return Position.ALARM_OVERSPEED;
case 0x42:
return Position.ALARM_GEOFENCE_EXIT;
case 0x43:
return Position.ALARM_GEOFENCE_ENTER;
default:
return null;
}
}
@Override
protected Object decode(
Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
ChannelBuffer buf = (ChannelBuffer) msg;
buf.skipBytes(2); // header
buf.readUnsignedShort(); // length
if (buf.readUnsignedShort() != 0x2424) {
return null;
}
buf.readUnsignedShort(); // model
buf.readUnsignedInt(); // firmware
String imei = ChannelBuffers.hexDump(buf.readBytes(8)).substring(1);
DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, imei);
if (deviceSession == null) {
return null;
}
buf.skipBytes(6); // device time
Position position = new Position();
position.setProtocol(getProtocolName());
position.setDeviceId(deviceSession.getDeviceId());
// GPS info
int blockLength = buf.readUnsignedShort();
int blockEnd = buf.readerIndex() + blockLength;
if (blockLength == 0) {
return null;
}
position.set(Position.KEY_SATELLITES, buf.readUnsignedByte());
double lat = buf.readUnsignedInt() / 600000.0;
double lon = buf.readUnsignedInt() / 600000.0;
DateBuilder dateBuilder = new DateBuilder()
.setDate(buf.readUnsignedByte(), buf.readUnsignedByte(), buf.readUnsignedByte())
.setTime(buf.readUnsignedByte(), buf.readUnsignedByte(), buf.readUnsignedByte());
position.setTime(dateBuilder.getDate());
position.setSpeed(buf.readUnsignedShort() * 0.01);
position.set(Position.KEY_ODOMETER, buf.readUnsignedMedium());
int flags = buf.readUnsignedShort();
position.setCourse(BitUtil.to(flags, 9));
if (!BitUtil.check(flags, 10)) {
lat = -lat;
}
position.setLatitude(lat);
if (BitUtil.check(flags, 9)) {
lon = -lon;
}
position.setLongitude(lon);
position.setValid(BitUtil.check(flags, 11));
buf.readerIndex(blockEnd);
// LBS info
blockLength = buf.readUnsignedShort();
blockEnd = buf.readerIndex() + blockLength;
if (blockLength > 0) {
position.set(Position.KEY_LAC, buf.readUnsignedShort());
position.set(Position.KEY_CID, buf.readUnsignedShort());
}
buf.readerIndex(blockEnd);
// Status info
blockLength = buf.readUnsignedShort();
blockEnd = buf.readerIndex() + blockLength;
if (blockLength > 0) {
position.set(Position.KEY_ALARM, decodeAlarm(buf.readUnsignedByte()));
buf.readUnsignedByte(); // terminal info
position.set(Position.PREFIX_IO + 1, buf.readUnsignedShort());
position.set(Position.KEY_GSM, buf.readUnsignedByte());
buf.readUnsignedByte(); // GSM status
position.set(Position.KEY_BATTERY, buf.readUnsignedShort());
position.set(Position.KEY_POWER, buf.readUnsignedShort());
position.set(Position.PREFIX_ADC + 1, buf.readUnsignedShort());
position.set(Position.PREFIX_ADC + 2, buf.readUnsignedShort());
position.set(Position.PREFIX_TEMP + 1, buf.readUnsignedShort());
}
buf.readerIndex(blockEnd);
// Cards
int index = 1;
for (int i = 0; i < 4; i++) {
blockLength = buf.readUnsignedShort();
blockEnd = buf.readerIndex() + blockLength;
if (blockLength > 0) {
int count = buf.readUnsignedByte();
for (int j = 0; j < count; j++) {
int length = buf.readUnsignedByte();
boolean odd = length % 2 != 0;
if (odd) {
length += 1;
}
String num = ChannelBuffers.hexDump(buf.readBytes(length / 2));
if (odd) {
num = num.substring(1);
}
position.set("card" + index, num);
}
}
buf.readerIndex(blockEnd);
}
buf.skipBytes(buf.readUnsignedShort()); // temperature
buf.skipBytes(buf.readUnsignedShort()); // lock
// Passengers
blockLength = buf.readUnsignedShort();
blockEnd = buf.readerIndex() + blockLength;
if (blockLength > 0) {
position.set("passengersOn", buf.readUnsignedMedium());
position.set("passengersOff", buf.readUnsignedMedium());
}
buf.readerIndex(blockEnd);
return position;
}
}
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