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/*
* Copyright 2015 - 2021 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.DeviceSession;
import org.traccar.NetworkMessage;
import org.traccar.Protocol;
import org.traccar.helper.BcdUtil;
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 java.math.BigInteger;
import java.net.SocketAddress;
import java.nio.charset.StandardCharsets;
import java.util.Date;
public class T800xProtocolDecoder extends BaseProtocolDecoder {
private short header = DEFAULT_HEADER;
public short getHeader() {
return header;
}
public T800xProtocolDecoder(Protocol protocol) {
super(protocol);
}
public static final short DEFAULT_HEADER = 0x2323;
public static final int MSG_LOGIN = 0x01;
public static final int MSG_GPS = 0x02;
public static final int MSG_HEARTBEAT = 0x03;
public static final int MSG_ALARM = 0x04;
public static final int MSG_NETWORK = 0x05;
public static final int MSG_BLE = 0x10;
public static final int MSG_COMMAND = 0x81;
private void sendResponse(Channel channel, short header, int type, int index, ByteBuf imei, int alarm) {
if (channel != null) {
ByteBuf response = Unpooled.buffer(alarm > 0 ? 16 : 15);
response.writeShort(header);
response.writeByte(type);
response.writeShort(response.capacity()); // length
response.writeShort(index);
response.writeBytes(imei);
if (alarm > 0) {
response.writeByte(alarm);
}
channel.writeAndFlush(new NetworkMessage(response, channel.remoteAddress()));
}
}
private String decodeAlarm(int value) {
switch (value) {
case 1:
return Position.ALARM_POWER_CUT;
case 2:
return Position.ALARM_LOW_BATTERY;
case 3:
return Position.ALARM_SOS;
case 4:
return Position.ALARM_OVERSPEED;
case 5:
return Position.ALARM_GEOFENCE_ENTER;
case 6:
return Position.ALARM_GEOFENCE_EXIT;
case 7:
return Position.ALARM_TOW;
case 8:
case 10:
return Position.ALARM_VIBRATION;
case 21:
return Position.ALARM_JAMMING;
case 23:
return Position.ALARM_POWER_RESTORED;
case 24:
return Position.ALARM_LOW_POWER;
default:
return null;
}
}
private Date readDate(ByteBuf buf) {
return new DateBuilder()
.setYear(BcdUtil.readInteger(buf, 2))
.setMonth(BcdUtil.readInteger(buf, 2))
.setDay(BcdUtil.readInteger(buf, 2))
.setHour(BcdUtil.readInteger(buf, 2))
.setMinute(BcdUtil.readInteger(buf, 2))
.setSecond(BcdUtil.readInteger(buf, 2))
.getDate();
}
@Override
protected Object decode(
Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
ByteBuf buf = (ByteBuf) msg;
header = buf.readShort();
int type = buf.readUnsignedByte();
buf.readUnsignedShort(); // length
int index = buf.readUnsignedShort();
ByteBuf imei = buf.readSlice(8);
DeviceSession deviceSession = getDeviceSession(
channel, remoteAddress, ByteBufUtil.hexDump(imei).substring(1));
if (deviceSession == null) {
return null;
}
if (type != MSG_GPS && type != MSG_ALARM) {
sendResponse(channel, header, type, index, imei, 0);
}
if (type == MSG_GPS || type == MSG_ALARM) {
return decodePosition(channel, deviceSession, buf, type, index, imei);
} else if (type == MSG_NETWORK) {
Position position = new Position(getProtocolName());
position.setDeviceId(deviceSession.getDeviceId());
getLastLocation(position, readDate(buf));
position.set(Position.KEY_OPERATOR, buf.readCharSequence(
buf.readUnsignedByte(), StandardCharsets.UTF_16LE).toString());
position.set("networkTechnology", buf.readCharSequence(
buf.readUnsignedByte(), StandardCharsets.US_ASCII).toString());
position.set("networkBand", buf.readCharSequence(
buf.readUnsignedByte(), StandardCharsets.US_ASCII).toString());
buf.readCharSequence(buf.readUnsignedByte(), StandardCharsets.US_ASCII); // imsi
position.set(Position.KEY_ICCID, buf.readCharSequence(
buf.readUnsignedByte(), StandardCharsets.US_ASCII).toString());
return position;
} else if (type == MSG_BLE) {
return decodeBle(channel, deviceSession, buf, type, index, imei);
} else if (type == MSG_COMMAND) {
Position position = new Position(getProtocolName());
position.setDeviceId(deviceSession.getDeviceId());
getLastLocation(position, null);
buf.readUnsignedByte(); // protocol number
position.set(Position.KEY_RESULT, buf.toString(StandardCharsets.UTF_16LE));
return position;
}
return null;
}
private Position decodeBle(
Channel channel, DeviceSession deviceSession, ByteBuf buf, int type, int index, ByteBuf imei) {
Position position = new Position(getProtocolName());
position.setDeviceId(deviceSession.getDeviceId());
getLastLocation(position, readDate(buf));
position.set(Position.KEY_IGNITION, buf.readUnsignedByte() > 0);
int i = 1;
while (buf.isReadable()) {
switch (buf.readUnsignedShort()) {
case 0x01:
position.set("tag" + i + "Id", ByteBufUtil.hexDump(buf.readSlice(6)));
position.set("tag" + i + "Battery", buf.readUnsignedByte() * 0.01 + 1.22);
position.set("tag" + i + "TirePressure", buf.readUnsignedByte() * 1.527 * 2);
position.set("tag" + i + "TireTemp", buf.readUnsignedByte() - 55);
position.set("tag" + i + "TireStatus", buf.readUnsignedByte());
break;
case 0x02:
position.set("tag" + i + "Id", ByteBufUtil.hexDump(buf.readSlice(6)));
position.set("tag" + i + "Battery", BcdUtil.readInteger(buf, 2) * 0.1);
switch (buf.readUnsignedByte()) {
case 0:
position.set(Position.KEY_ALARM, Position.ALARM_SOS);
break;
case 1:
position.set(Position.KEY_ALARM, Position.ALARM_LOW_BATTERY);
break;
default:
break;
}
buf.readUnsignedByte(); // status
buf.skipBytes(16); // location
break;
case 0x03:
position.set(Position.KEY_DRIVER_UNIQUE_ID, ByteBufUtil.hexDump(buf.readSlice(6)));
position.set("tag" + i + "Battery", BcdUtil.readInteger(buf, 2) * 0.1);
if (buf.readUnsignedByte() == 1) {
position.set(Position.KEY_ALARM, Position.ALARM_LOW_BATTERY);
}
buf.readUnsignedByte(); // status
buf.skipBytes(16); // location
break;
case 0x04:
position.set("tag" + i + "Id", ByteBufUtil.hexDump(buf.readSlice(6)));
position.set("tag" + i + "Battery", buf.readUnsignedByte() * 0.01 + 2);
buf.readUnsignedByte(); // battery level
position.set("tag" + i + "Temp", buf.readUnsignedShort() * 0.01);
position.set("tag" + i + "Humidity", buf.readUnsignedShort() * 0.01);
position.set("tag" + i + "LightSensor", buf.readUnsignedShort());
position.set("tag" + i + "Rssi", buf.readUnsignedByte() - 128);
break;
case 0x05:
position.set("tag" + i + "Id", ByteBufUtil.hexDump(buf.readSlice(6)));
position.set("tag" + i + "Battery", buf.readUnsignedByte() * 0.01 + 2);
buf.readUnsignedByte(); // battery level
position.set("tag" + i + "Temp", buf.readUnsignedShort() * 0.01);
position.set("tag" + i + "Door", buf.readUnsignedByte() > 0);
position.set("tag" + i + "Rssi", buf.readUnsignedByte() - 128);
break;
case 0x06:
position.set("tag" + i + "Id", ByteBufUtil.hexDump(buf.readSlice(6)));
position.set("tag" + i + "Battery", buf.readUnsignedByte() * 0.01 + 2);
position.set("tag" + i + "Output", buf.readUnsignedByte() > 0);
position.set("tag" + i + "Rssi", buf.readUnsignedByte() - 128);
break;
default:
break;
}
i += 1;
}
sendResponse(channel, header, type, index, imei, 0);
return position;
}
private Position decodePosition(
Channel channel, DeviceSession deviceSession, ByteBuf buf, int type, int index, ByteBuf imei) {
Position position = new Position(getProtocolName());
position.setDeviceId(deviceSession.getDeviceId());
position.set(Position.KEY_INDEX, index);
if (header != 0x2727) {
buf.readUnsignedShort(); // acc on interval
buf.readUnsignedShort(); // acc off interval
buf.readUnsignedByte(); // angle compensation
buf.readUnsignedShort(); // distance compensation
position.set(Position.KEY_RSSI, BitUtil.to(buf.readUnsignedShort(), 7));
}
int status = buf.readUnsignedByte();
position.set(Position.KEY_SATELLITES, BitUtil.to(status, 5));
if (header != 0x2727) {
buf.readUnsignedByte(); // gsensor manager status
buf.readUnsignedByte(); // other flags
buf.readUnsignedByte(); // heartbeat
buf.readUnsignedByte(); // relay status
buf.readUnsignedShort(); // drag alarm setting
int io = buf.readUnsignedShort();
position.set(Position.KEY_IGNITION, BitUtil.check(io, 14));
position.set("ac", BitUtil.check(io, 13));
position.set(Position.PREFIX_IN + 3, BitUtil.check(io, 12));
position.set(Position.PREFIX_IN + 4, BitUtil.check(io, 11));
position.set(Position.PREFIX_OUT + 1, BitUtil.check(io, 7));
position.set(Position.PREFIX_OUT + 2, BitUtil.check(io, 8));
position.set(Position.PREFIX_OUT + 3, BitUtil.check(io, 9));
if (header != 0x2626) {
for (int i = 1; i <= 2; i++) {
String value = ByteBufUtil.hexDump(buf.readSlice(2));
if (!value.equals("ffff")) {
position.set(Position.PREFIX_ADC + i, Integer.parseInt(value) * 0.01);
}
}
}
}
int alarm = buf.readUnsignedByte();
position.set(Position.KEY_ALARM, decodeAlarm(alarm));
if (header != 0x2727) {
buf.readUnsignedByte(); // reserved
position.set(Position.KEY_ODOMETER, buf.readUnsignedInt());
int battery = BcdUtil.readInteger(buf, 2);
position.set(Position.KEY_BATTERY_LEVEL, battery > 0 ? battery : 100);
}
if (BitUtil.check(status, 6)) {
position.setValid(!BitUtil.check(status, 7));
position.setTime(readDate(buf));
position.setAltitude(buf.readFloatLE());
position.setLongitude(buf.readFloatLE());
position.setLatitude(buf.readFloatLE());
position.setSpeed(UnitsConverter.knotsFromKph(BcdUtil.readInteger(buf, 4) * 0.1));
position.setCourse(buf.readUnsignedShort());
} else {
getLastLocation(position, readDate(buf));
int mcc = buf.readUnsignedShortLE();
int mnc = buf.readUnsignedShortLE();
if (mcc != 0xffff && mnc != 0xffff) {
Network network = new Network();
for (int i = 0; i < 3; i++) {
network.addCellTower(CellTower.from(
mcc, mnc, buf.readUnsignedShortLE(), buf.readUnsignedShortLE()));
}
position.setNetwork(network);
}
}
if (header == 0x2727) {
byte[] accelerationBytes = new byte[5];
buf.readBytes(accelerationBytes);
long acceleration = new BigInteger(accelerationBytes).longValue();
double accelerationZ = BitUtil.between(acceleration, 8, 15) + BitUtil.between(acceleration, 4, 8) * 0.1;
if (!BitUtil.check(acceleration, 15)) {
accelerationZ = -accelerationZ;
}
double accelerationY = BitUtil.between(acceleration, 20, 27) + BitUtil.between(acceleration, 16, 20) * 0.1;
if (!BitUtil.check(acceleration, 27)) {
accelerationY = -accelerationY;
}
double accelerationX = BitUtil.between(acceleration, 28, 32) + BitUtil.between(acceleration, 32, 39) * 0.1;
if (!BitUtil.check(acceleration, 39)) {
accelerationX = -accelerationX;
}
position.set(Position.KEY_G_SENSOR, "[" + accelerationX + "," + accelerationY + "," + accelerationZ + "]");
int battery = BcdUtil.readInteger(buf, 2);
position.set(Position.KEY_BATTERY_LEVEL, battery > 0 ? battery : 100);
position.set(Position.KEY_DEVICE_TEMP, (int) buf.readByte());
position.set("lightSensor", BcdUtil.readInteger(buf, 2) * 0.1);
position.set(Position.KEY_BATTERY, BcdUtil.readInteger(buf, 2) * 0.1);
position.set("solarPanel", BcdUtil.readInteger(buf, 2) * 0.1);
position.set(Position.KEY_ODOMETER, buf.readUnsignedInt());
int inputStatus = buf.readUnsignedShort();
position.set(Position.KEY_IGNITION, BitUtil.check(inputStatus, 2));
position.set(Position.KEY_RSSI, BitUtil.between(inputStatus, 4, 11));
buf.readUnsignedShort(); // ignition on upload interval
buf.readUnsignedInt(); // ignition off upload interval
buf.readUnsignedByte(); // angle upload interval
buf.readUnsignedShort(); // distance upload interval
buf.readUnsignedByte(); // heartbeat
} else if (buf.readableBytes() >= 2) {
position.set(Position.KEY_POWER, BcdUtil.readInteger(buf, 4) * 0.01);
}
sendResponse(channel, header, type, index, imei, alarm);
return position;
}
}
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