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/*
* Copyright 2019 - 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 org.traccar.model.WifiAccessPoint;
import java.net.SocketAddress;
import java.util.Calendar;
import java.util.TimeZone;
public class TopinProtocolDecoder extends BaseProtocolDecoder {
public TopinProtocolDecoder(Protocol protocol) {
super(protocol);
}
public static final int MSG_LOGIN = 0x01;
public static final int MSG_GPS_2 = 0x08;
public static final int MSG_GPS_OFFLINE_2 = 0x09;
public static final int MSG_GPS = 0x10;
public static final int MSG_GPS_OFFLINE = 0x11;
public static final int MSG_STATUS = 0x13;
public static final int MSG_WIFI_OFFLINE = 0x17;
public static final int MSG_TIME_UPDATE = 0x30;
public static final int MSG_SOS_NUMBER = 0x41;
public static final int MSG_WIFI = 0x69;
public static final int MSG_VIBRATION_ON = 0x92;
public static final int MSG_VIBRATION_OFF = 0x93;
public static final int MSG_VIBRATION = 0x94;
private void sendResponse(Channel channel, int length, int type, ByteBuf content) {
if (channel != null) {
ByteBuf response = Unpooled.buffer();
response.writeShort(0x7878);
response.writeByte(length);
response.writeByte(type);
response.writeBytes(content);
response.writeByte('\r');
response.writeByte('\n');
content.release();
channel.writeAndFlush(new NetworkMessage(response, channel.remoteAddress()));
}
}
private void updateTime(Channel channel, int type) {
ByteBuf dateBuffer = Unpooled.buffer();
Calendar calendar = Calendar.getInstance(TimeZone.getTimeZone("UTC"));
dateBuffer.writeShort(calendar.get(Calendar.YEAR));
dateBuffer.writeByte(calendar.get(Calendar.MONTH) + 1);
dateBuffer.writeByte(calendar.get(Calendar.DAY_OF_MONTH));
dateBuffer.writeByte(calendar.get(Calendar.HOUR_OF_DAY));
dateBuffer.writeByte(calendar.get(Calendar.MINUTE));
dateBuffer.writeByte(calendar.get(Calendar.SECOND));
sendResponse(channel, dateBuffer.readableBytes(), type, dateBuffer);
}
private double readCoordinate(ByteBuf buf) {
int degrees = buf.readUnsignedByte();
boolean negative = (buf.getUnsignedByte(buf.readerIndex()) & 0xf0) > 0;
int decimal = buf.readUnsignedMedium() & 0x0fffff;
double result = degrees + decimal * 0.000001;
return negative ? -result : result;
}
private String decodeAlarm(int alarms) {
if (BitUtil.check(alarms, 0)) {
return Position.ALARM_VIBRATION;
}
if (BitUtil.check(alarms, 1)) {
return Position.ALARM_OVERSPEED;
}
if (BitUtil.check(alarms, 4)) {
return Position.ALARM_LOW_POWER;
}
return null;
}
@Override
protected Object decode(
Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
ByteBuf buf = (ByteBuf) msg;
buf.skipBytes(2); // header
int length = buf.readUnsignedByte();
int type = buf.readUnsignedByte();
DeviceSession deviceSession;
if (type == MSG_LOGIN) {
String imei = ByteBufUtil.hexDump(buf.readSlice(8)).substring(1);
deviceSession = getDeviceSession(channel, remoteAddress, imei);
ByteBuf content = Unpooled.buffer();
content.writeByte(deviceSession != null ? 0x01 : 0x44);
sendResponse(channel, length, type, content);
updateTime(channel, MSG_TIME_UPDATE);
return null;
} else {
deviceSession = getDeviceSession(channel, remoteAddress);
if (deviceSession == null) {
return null;
}
}
if (type == MSG_GPS_2 || type == MSG_GPS_OFFLINE_2) {
if (buf.readableBytes() <= 2) {
return null;
}
Position position = new Position(getProtocolName());
position.setDeviceId(deviceSession.getDeviceId());
DateBuilder dateBuilder = new DateBuilder()
.setDate(buf.readUnsignedByte(), buf.readUnsignedByte(), buf.readUnsignedByte())
.setTime(buf.readUnsignedByte(), buf.readUnsignedByte(), buf.readUnsignedByte());
position.setTime(dateBuilder.getDate());
position.setValid(type == MSG_GPS_2);
position.setLatitude(readCoordinate(buf));
position.setLongitude(readCoordinate(buf));
buf.skipBytes(4 + 4); // second coordinates
position.setSpeed(UnitsConverter.knotsFromKph(buf.readUnsignedByte()));
position.setCourse(buf.readUnsignedByte() * 2);
position.set(Position.KEY_SATELLITES, buf.readUnsignedByte());
return position;
} else if (type == MSG_GPS || type == MSG_GPS_OFFLINE) {
Position position = new Position(getProtocolName());
position.setDeviceId(deviceSession.getDeviceId());
ByteBuf time = buf.slice(buf.readerIndex(), 6);
Gt06ProtocolDecoder.decodeGps(position, buf, false, TimeZone.getTimeZone("UTC"));
if (buf.readableBytes() >= 5) {
position.setAltitude(buf.readShort());
position.set(Position.KEY_ALARM, decodeAlarm(buf.readUnsignedByte()));
}
ByteBuf content = Unpooled.buffer();
content.writeBytes(time);
sendResponse(channel, length, type, content);
return position;
} else if (type == MSG_TIME_UPDATE) {
updateTime(channel, type);
return null;
} else if (type == MSG_STATUS) {
Position position = new Position(getProtocolName());
position.setDeviceId(deviceSession.getDeviceId());
getLastLocation(position, null);
position.set(Position.KEY_BATTERY_LEVEL, buf.readUnsignedByte());
position.set(Position.KEY_VERSION_FW, buf.readUnsignedByte());
buf.readUnsignedByte(); // timezone
int interval = buf.readUnsignedByte();
if (buf.readableBytes() >= 1 + 2) {
position.set(Position.KEY_RSSI, buf.readUnsignedByte());
}
if (buf.readableBytes() >= 3 + 2) {
buf.skipBytes(3); // temperature
}
if (buf.readableBytes() >= 1 + 2) {
position.set(Position.KEY_CHARGE, buf.readUnsignedByte() > 0);
}
if (buf.readableBytes() >= 1 + 2) {
position.set(Position.KEY_HEART_RATE, buf.readUnsignedByte());
}
ByteBuf content = Unpooled.buffer();
content.writeByte(interval);
sendResponse(channel, length, type, content);
return position;
} else if (type == MSG_WIFI || type == MSG_WIFI_OFFLINE) {
Position position = new Position(getProtocolName());
position.setDeviceId(deviceSession.getDeviceId());
ByteBuf time = buf.readSlice(6);
DateBuilder dateBuilder = new DateBuilder()
.setYear(BcdUtil.readInteger(time, 2))
.setMonth(BcdUtil.readInteger(time, 2))
.setDay(BcdUtil.readInteger(time, 2))
.setHour(BcdUtil.readInteger(time, 2))
.setMinute(BcdUtil.readInteger(time, 2))
.setSecond(BcdUtil.readInteger(time, 2));
time.resetReaderIndex();
getLastLocation(position, dateBuilder.getDate());
Network network = new Network();
for (int i = 0; i < length; i++) {
String mac = String.format("%02x:%02x:%02x:%02x:%02x:%02x",
buf.readUnsignedByte(), buf.readUnsignedByte(), buf.readUnsignedByte(),
buf.readUnsignedByte(), buf.readUnsignedByte(), buf.readUnsignedByte());
network.addWifiAccessPoint(WifiAccessPoint.from(mac, buf.readUnsignedByte()));
}
int cellCount = buf.readUnsignedByte();
int mcc = buf.readUnsignedShort();
int mnc = buf.readUnsignedByte();
for (int i = 0; i < cellCount; i++) {
network.addCellTower(CellTower.from(
mcc, mnc, buf.readUnsignedShort(), buf.readUnsignedShort(), buf.readUnsignedByte()));
}
if (buf.readableBytes() > 2) {
position.set(Position.KEY_ALARM, decodeAlarm(buf.readUnsignedByte()));
}
position.setNetwork(network);
ByteBuf content = Unpooled.buffer();
content.writeBytes(time);
sendResponse(channel, length, type, content);
return position;
} else if (type == MSG_VIBRATION) {
Position position = new Position(getProtocolName());
position.setDeviceId(deviceSession.getDeviceId());
getLastLocation(position, null);
position.set(Position.KEY_ALARM, Position.ALARM_VIBRATION);
return position;
}
return null;
}
}
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