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package org.traccar.protocol;
import io.netty.buffer.ByteBuf;
import io.netty.buffer.ByteBufUtil;
import io.netty.channel.Channel;
import org.traccar.BaseProtocolDecoder;
import org.traccar.Protocol;
import org.traccar.helper.BitUtil;
import org.traccar.helper.UnitsConverter;
import org.traccar.model.CellTower;
import org.traccar.model.Network;
import org.traccar.model.Position;
import org.traccar.session.DeviceSession;
import java.net.SocketAddress;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.TimeZone;
public class TranSyncProtocolDecoder extends BaseProtocolDecoder {
public TranSyncProtocolDecoder(Protocol protocol) {
super(protocol);
}
public Date getDatefromIntegerParameters(int year, int month, int day, int hours, int minutes, int seconds) {
String dataString = ""+year + "-" + month + "-" + day + " " + hours + ":" + minutes + ":" + seconds;
SimpleDateFormat simpleDateFormat = new SimpleDateFormat("yy-MM-dd HH:mm:ss");
simpleDateFormat.setTimeZone(TimeZone.getTimeZone("UTC"));
try {
return simpleDateFormat.parse(dataString);
} catch (ParseException e) {
e.printStackTrace();
}
return null;
}
protected void setDeviceAlert(Position position, int alert) {
switch (alert) {
case 10:
position.set(Position.ALARM_SOS, true);
break;
case 11:
position.set(Position.ALARM_SOS, false);
break;
case 16:
position.set(Position.KEY_EVENT, 16);
break;
case 3:
position.set("distressCutOff", true);
break;
case 22:
position.set("tilt", true);
break;
case 9:
position.set(Position.KEY_EVENT, 9);
case 17:
position.set(Position.ALARM_OVERSPEED, true);
break;
case 13:
position.set(Position.ALARM_BRAKING, true);
break;
case 14:
position.set(Position.ALARM_ACCELERATION, true);
break;
case 15:
position.set(Position.KEY_EVENT, 15);
break;
case 23:
position.set(Position.ALARM_ACCIDENT, true);
break;
case 12:
position.set(Position.KEY_EVENT, 12);
break;
case 6:
position.set(Position.ALARM_POWER_RESTORED, true);
break;
case 4:
position.set(Position.ALARM_LOW_BATTERY, true);
break;
case 5:
position.set(Position.KEY_EVENT, 5);
break;
}
}
private void setNetwork(Position position, int lacInt, int cellIdInt, int mobileNetworkCode, int gsmSignalStrength){
CellTower cellTower = CellTower.fromLacCid(getConfig(), lacInt, cellIdInt);
cellTower.setMobileNetworkCode(mobileNetworkCode);
cellTower.setSignalStrength(gsmSignalStrength);
position.setNetwork(new Network(cellTower));
}
private String getTrackerModel(int mask){
switch (mask) {
case 1:
return "basic";
case 2:
return "asset";
case 3:
return "bike";
case 4:
return "serial";
case 5:
return "obd";
case 6:
return "l1";
case 7:
return "ais";
default:
return "unknown";
}
}
private Position parseData(Channel channel, SocketAddress remoteAddress, ByteBuf buf) {
if (ByteBufUtil.hexDump(buf, 0, 2).equalsIgnoreCase("3A3A")) {
buf.readUnsignedShort();
}
int packetLength = buf.readByte();
int lacInt = buf.readUnsignedShort();
String deviceId = ByteBufUtil.hexDump(buf, buf.readerIndex(), 8).toUpperCase().trim().replaceFirst("^0+(?!$)", "");
buf.readBytes(8);
int informationSerialNumber = buf.readUnsignedShort();
int protocolNumber = buf.readUnsignedByte();
DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, deviceId);
if (deviceSession == null) {
return null;
}
Position position = new Position(getProtocolName());
long devicesessionId = deviceSession.getDeviceId();
position.setDeviceId(devicesessionId) ;
position.setValid(true);
int year = buf.readUnsignedByte();
int month = buf.readUnsignedByte();
int day = buf.readUnsignedByte();
int hour = buf.readUnsignedByte();
int minute = buf.readUnsignedByte();
int second = buf.readUnsignedByte();
position.setTime(getDatefromIntegerParameters(year, month, day, hour, minute, second));
position.setLatitude(buf.readUnsignedInt() / 1800000.0);
position.setLongitude(buf.readUnsignedInt() / 1800000.0);
position.setSpeed(UnitsConverter.knotsFromKph(buf.readUnsignedByte()));
position.setCourse(buf.readUnsignedShort());
int mobileNetworkCode = buf.readUnsignedByte();
int cellIdInt = buf.readUnsignedShort();
int zeroByte = buf.readUnsignedByte();
position.set(Position.PREFIX_OUT + 1, BitUtil.check(zeroByte, 0));
position.set(Position.PREFIX_OUT + 2, BitUtil.check(zeroByte, 1));
position.set(Position.PREFIX_IN + 3, BitUtil.check(zeroByte, 2));
if (BitUtil.check(zeroByte, 3)) position.set(Position.ALARM_POWER_OFF, true);
position.set(Position.KEY_IGNITION, BitUtil.check(zeroByte, 4));
position.set("gpsFix", BitUtil.check(zeroByte, 7));
int oneByte = buf.readUnsignedByte();
int deviceAlert = buf.readUnsignedByte();
if (deviceAlert > 0) { setDeviceAlert(position, deviceAlert); }
int threeByte = buf.readUnsignedByte();
if (!((threeByte & 0b10000000) == 0)) position.set("restored", true);
if ((threeByte & 0b00100000) != 0) {
position.set(Position.ALARM_GPS_ANTENNA_CUT, true);
position.set("gpsAlert", true);
}
position.set("model", getTrackerModel(threeByte & 0b00001111));
int gsmSignalStrength = buf.readUnsignedByte();
position.set(Position.KEY_BATTERY, (double) (buf.readUnsignedByte() / 10));
position.set(Position.KEY_SATELLITES, buf.readUnsignedByte());
position.set(Position.KEY_HDOP, buf.readUnsignedByte());
position.set(Position.PREFIX_ADC + 1, (short) buf.readUnsignedShort());
boolean isOptionalParameters = (buf.readableBytes() > 2);
setNetwork(position, lacInt, cellIdInt, mobileNetworkCode, gsmSignalStrength);
if (isOptionalParameters) { // Always True
int odometerIndex = buf.readUnsignedByte();
int odometerLength = buf.readUnsignedByte();
if (odometerLength > 0) {
String odometerReading = ByteBufUtil.hexDump(buf, buf.readerIndex(), odometerLength).toUpperCase().trim().replaceFirst("^0+(?!$)", "");
int odometer = Integer.parseInt(odometerReading);
buf.readBytes(odometerLength);
position.set(Position.KEY_ODOMETER, odometer);
}
if ((buf.readableBytes() > 2)) {
int rfidIndex = buf.readUnsignedByte();
int rfidLength = buf.readUnsignedByte();
if(rfidLength > 0) {
String rfidTagName = ByteBufUtil.hexDump(buf, buf.readerIndex(), rfidLength).toUpperCase().trim();
buf.readBytes(rfidLength);
position.set("tag", rfidTagName);
}
}
if ((buf.readableBytes() > 5)) {
int adcTwoIndex = buf.readUnsignedByte();
int adcTwoLength = buf.readUnsignedByte();
if (adcTwoLength > 0){
position.set(Position.PREFIX_ADC + 2, buf.readUnsignedShort());
}
}
}
return position;
}
@Override
protected Object decode( Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
ByteBuf buffer = (ByteBuf) msg;
return parseData(channel, remoteAddress, buffer);
}
}
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