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/*
* Copyright 2013 - 2023 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 io.netty.buffer.ByteBuf;
import io.netty.buffer.ByteBufUtil;
import io.netty.buffer.Unpooled;
import io.netty.channel.Channel;
import org.traccar.BaseProtocolDecoder;
import org.traccar.NetworkMessage;
import org.traccar.Protocol;
import org.traccar.helper.BitUtil;
import org.traccar.helper.DateBuilder;
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.util.Arrays;
public class TranSyncProtocolDecoder extends BaseProtocolDecoder {
private static final byte[] STX = new byte[]{0x3a, 0x3a};
public TranSyncProtocolDecoder(Protocol protocol) {
super(protocol);
}
protected void decodeAlarm(Position position, int value) {
switch (value) {
case 10:
position.set(Position.KEY_ALARM, Position.ALARM_SOS);
break;
case 11:
position.set(Position.KEY_EVENT, 11);
break;
case 16:
position.set(Position.KEY_EVENT, 16);
break;
case 3:
position.set(Position.KEY_ALARM, 3);
break;
case 22:
position.set(Position.KEY_ALARM, 22);
break;
case 9:
position.set(Position.KEY_EVENT, 9);
case 17:
position.set(Position.KEY_ALARM, Position.ALARM_OVERSPEED);
break;
case 13:
position.set(Position.KEY_ALARM, Position.ALARM_BRAKING);
break;
case 14:
position.set(Position.KEY_ALARM, Position.ALARM_ACCELERATION);
break;
case 15:
position.set(Position.KEY_EVENT, 15);
break;
case 23:
position.set(Position.KEY_ALARM, Position.ALARM_ACCIDENT);
break;
case 12:
position.set(Position.KEY_EVENT, 12);
break;
case 6:
position.set(Position.KEY_ALARM, Position.ALARM_POWER_RESTORED);
break;
case 4:
position.set(Position.KEY_ALARM, Position.ALARM_LOW_BATTERY);
break;
case 5:
position.set(Position.KEY_EVENT, 5);
break;
}
}
private void decodePowerEngineParameters(Position position, int value){
position.set(Position.PREFIX_OUT + 1, BitUtil.check(value, 7));
position.set(Position.PREFIX_OUT + 2, BitUtil.check(value, 6));
position.set(Position.PREFIX_IN + 3, BitUtil.check(value, 5));
if (BitUtil.check(value, 4)) position.set(Position.KEY_ALARM, Position.ALARM_POWER_OFF);
position.set(Position.KEY_IGNITION, BitUtil.check(value, 3));
position.set("gpsFix", BitUtil.check(value, 0));
}
private void decodeTrackerStatusParameters(Position position, int value){
if (BitUtil.check(value, 7)) position.set("restored", true);
if (BitUtil.check(value, 5)) {
position.set(Position.KEY_ALARM, Position.ALARM_GPS_ANTENNA_CUT);
}
}
private void sendResponse(Channel channel) {
if (channel != null) {
ByteBuf response = Unpooled.buffer(5);
response.writeByte(22);
response.writeByte(1);
response.writeShort(response.capacity()); // length
response.writeByte(4);
channel.writeAndFlush(new NetworkMessage(response, channel.remoteAddress()));
}
}
@Override
protected Object decode(Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
ByteBuf buf = (ByteBuf) msg;
if (Arrays.equals(ByteBufUtil.getBytes(buf, 0, 2), STX)) {
buf.readUnsignedShort();
}
buf.readByte(); //packetLength
int locationAreaCode = buf.readUnsignedShort();
String deviceId = ByteBufUtil.hexDump(buf.readSlice(8));
buf.readUnsignedShort(); //informationSerialNumber
buf.readUnsignedByte(); //protocolNumber
DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, deviceId);
if (deviceSession == null) {
return null;
}
Position position = new Position(getProtocolName());
position.setDeviceId(deviceSession.getDeviceId());
position.setValid(true);
position.setTime(new DateBuilder()
.setDate(buf.readUnsignedByte(), buf.readUnsignedByte(), buf.readUnsignedByte())
.setTime(buf.readUnsignedByte(), buf.readUnsignedByte(), buf.readUnsignedByte())
.getDate());
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 cellTowerId = buf.readUnsignedShort();
decodePowerEngineParameters(position, buf.readUnsignedByte());
buf.readUnsignedByte(); // not in use
decodeAlarm(position, buf.readUnsignedByte());
decodeTrackerStatusParameters(position, buf.readUnsignedByte());
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());
CellTower cellTower = CellTower.fromLacCid(getConfig(), locationAreaCode, cellTowerId);
cellTower.setMobileNetworkCode(mobileNetworkCode);
cellTower.setSignalStrength(gsmSignalStrength);
position.setNetwork(new Network(cellTower));
if (buf.readableBytes() > 2) {
buf.readUnsignedByte(); // odometerIndex
int odometerLength = buf.readUnsignedByte();
if (odometerLength > 0) {
int odometer = buf.readBytes(odometerLength).readInt();
position.set(Position.KEY_ODOMETER, odometer);
}
if ((buf.readableBytes() > 2)) {
buf.readUnsignedByte(); // tagIndex
int tagLength = buf.readUnsignedByte();
if (tagLength > 0) {
position.set("tag", ByteBufUtil.hexDump(buf.readSlice(tagLength)));
}
}
if ((buf.readableBytes() > 5)) {
buf.readUnsignedByte(); // adc2Index
int adc2Length = buf.readUnsignedByte();
if (adc2Length > 0) {
position.set(Position.PREFIX_ADC + 2, buf.readUnsignedShort());
}
}
if ((buf.readableBytes() > 5)) {
buf.readUnsignedByte(); // adc2Index
int adc2Length = buf.readUnsignedByte();
if (adc2Length > 0 && adc2Length <= buf.readableBytes() - 2) {
position.set(Position.PREFIX_ADC + 3, buf.readUnsignedShort());
}
}
}
sendResponse(channel);
return position;
}
}
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