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/*
* Copyright 2016 - 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.session.DeviceSession;
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.model.WifiAccessPoint;
import java.net.SocketAddress;
import java.nio.charset.StandardCharsets;
public class HuaShengProtocolDecoder extends BaseProtocolDecoder {
public HuaShengProtocolDecoder(Protocol protocol) {
super(protocol);
}
public static final int MSG_POSITION = 0xAA00;
public static final int MSG_POSITION_RSP = 0xFF01;
public static final int MSG_LOGIN = 0xAA02;
public static final int MSG_LOGIN_RSP = 0xFF03;
public static final int MSG_UPFAULT = 0xAA12;
public static final int MSG_UPFAULT_RSP = 0xFF13;
public static final int MSG_HSO_REQ = 0x0002;
public static final int MSG_HSO_RSP = 0x0003;
public static final int MSG_SET_REQ = 0xAA04;
public static final int MSG_SET_RSP = 0xFF05;
public static final int MSG_CTRL_REQ = 0xAA16;
public static final int MSG_CTRL_RSP = 0xFF17;
private void sendResponse(Channel channel, int type, int index, ByteBuf content) {
if (channel != null) {
ByteBuf response = Unpooled.buffer();
response.writeByte(0xC0);
response.writeShort(0x0100);
response.writeShort(12 + (content != null ? content.readableBytes() : 0));
response.writeShort(type);
response.writeShort(0);
response.writeInt(index);
if (content != null) {
response.writeBytes(content);
content.release();
}
response.writeByte(0xC0);
channel.writeAndFlush(new NetworkMessage(response, channel.remoteAddress()));
}
}
private String decodeAlarm(int event) {
return switch (event) {
case 4 -> Position.ALARM_FATIGUE_DRIVING;
case 6 -> Position.ALARM_SOS;
case 7 -> Position.ALARM_BRAKING;
case 8 -> Position.ALARM_ACCELERATION;
case 9 -> Position.ALARM_CORNERING;
case 10 -> Position.ALARM_ACCIDENT;
case 16 -> Position.ALARM_REMOVING;
default -> null;
};
}
@Override
protected Object decode(
Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
ByteBuf buf = (ByteBuf) msg;
buf.skipBytes(1); // start marker
buf.readUnsignedByte(); // flag
buf.readUnsignedByte(); // reserved
buf.readUnsignedShort(); // length
int type = buf.readUnsignedShort();
buf.readUnsignedShort(); // checksum
int index = buf.readInt();
if (type == MSG_LOGIN) {
while (buf.readableBytes() > 4) {
int subtype = buf.readUnsignedShort();
int length = buf.readUnsignedShort() - 4;
if (subtype == 0x0003) {
String imei = buf.readCharSequence(length, StandardCharsets.US_ASCII).toString();
DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, imei);
if (deviceSession != null && channel != null) {
ByteBuf content = Unpooled.buffer();
content.writeByte(0); // success
sendResponse(channel, MSG_LOGIN_RSP, index, content);
}
} else {
buf.skipBytes(length);
}
}
} else if (type == MSG_HSO_REQ) {
sendResponse(channel, MSG_HSO_RSP, index, null);
} else if (type == MSG_UPFAULT) {
return decodeFaultCodes(channel, remoteAddress, buf);
} else if (type == MSG_POSITION) {
return decodePosition(channel, remoteAddress, buf, index);
}
return null;
}
private Position decodeFaultCodes(
Channel channel, SocketAddress remoteAddress, ByteBuf buf) {
DeviceSession deviceSession = getDeviceSession(channel, remoteAddress);
if (deviceSession == null) {
return null;
}
Position position = new Position(getProtocolName());
position.setDeviceId(deviceSession.getDeviceId());
getLastLocation(position, null);
buf.readUnsignedShort(); // type
buf.readUnsignedShort(); // length
StringBuilder codes = new StringBuilder();
while (buf.readableBytes() > 2) {
String value = ByteBufUtil.hexDump(buf.readSlice(2));
int digit = Integer.parseInt(value.substring(0, 1), 16);
char prefix = switch (digit >> 2) {
default -> 'P';
case 1 -> 'C';
case 2 -> 'B';
case 3 -> 'U';
};
codes.append(prefix).append(digit % 4).append(value.substring(1));
if (buf.readableBytes() > 2) {
codes.append(' ');
}
}
position.set(Position.KEY_DTCS, codes.toString());
return position;
}
private Position decodePosition(
Channel channel, SocketAddress remoteAddress, ByteBuf buf, int index) {
DeviceSession deviceSession = getDeviceSession(channel, remoteAddress);
if (deviceSession == null) {
return null;
}
Position position = new Position(getProtocolName());
position.setDeviceId(deviceSession.getDeviceId());
int status = buf.readUnsignedShort();
position.setValid(BitUtil.check(status, 15));
position.set(Position.KEY_STATUS, status);
position.set(Position.KEY_IGNITION, BitUtil.check(status, 14));
int event = buf.readUnsignedShort();
position.set(Position.KEY_ALARM, decodeAlarm(event));
position.set(Position.KEY_EVENT, event);
String time = buf.readCharSequence(12, StandardCharsets.US_ASCII).toString();
DateBuilder dateBuilder = new DateBuilder()
.setYear(Integer.parseInt(time.substring(0, 2)))
.setMonth(Integer.parseInt(time.substring(2, 4)))
.setDay(Integer.parseInt(time.substring(4, 6)))
.setHour(Integer.parseInt(time.substring(6, 8)))
.setMinute(Integer.parseInt(time.substring(8, 10)))
.setSecond(Integer.parseInt(time.substring(10, 12)));
position.setTime(dateBuilder.getDate());
position.setLongitude(buf.readInt() * 0.00001);
position.setLatitude(buf.readInt() * 0.00001);
position.setSpeed(UnitsConverter.knotsFromKph(buf.readUnsignedShort()));
position.setCourse(buf.readUnsignedShort());
position.setAltitude(buf.readUnsignedShort());
buf.readUnsignedShort(); // odometer speed
Network network = new Network();
while (buf.readableBytes() > 4) {
int subtype = buf.readUnsignedShort();
int length = buf.readUnsignedShort() - 4;
int endIndex = buf.readerIndex() + length;
switch (subtype) {
case 0x0001:
int coolantTemperature = buf.readUnsignedByte() - 40;
if (coolantTemperature <= 215) {
position.set(Position.KEY_COOLANT_TEMP, coolantTemperature);
}
int rpm = buf.readUnsignedShort();
if (rpm <= 65535) {
position.set(Position.KEY_RPM, rpm);
}
position.set("averageSpeed", buf.readUnsignedByte());
buf.readUnsignedShort(); // interval fuel consumption
position.set(Position.KEY_FUEL_CONSUMPTION, buf.readUnsignedShort() * 0.01);
position.set(Position.KEY_ODOMETER_TRIP, buf.readUnsignedShort());
position.set(Position.KEY_POWER, buf.readUnsignedShort() * 0.01);
position.set(Position.KEY_FUEL_LEVEL, buf.readUnsignedByte() * 0.4);
buf.readUnsignedInt(); // trip id
if (buf.readerIndex() < endIndex) {
position.set("adBlueLevel", buf.readUnsignedByte() * 0.4);
}
break;
case 0x0005:
position.set(Position.KEY_RSSI, buf.readUnsignedByte());
position.set(Position.KEY_HDOP, buf.readUnsignedByte());
buf.readUnsignedInt(); // run time
break;
case 0x0009:
position.set(Position.KEY_VIN, buf.readCharSequence(length, StandardCharsets.US_ASCII).toString());
break;
case 0x0010:
position.set(Position.KEY_ODOMETER, Double.parseDouble(
buf.readCharSequence(length, StandardCharsets.US_ASCII).toString()) * 1000);
break;
case 0x0011:
position.set(Position.KEY_HOURS, buf.readUnsignedInt() * 0.05);
break;
case 0x0014:
position.set(Position.KEY_ENGINE_LOAD, buf.readUnsignedByte() / 255.0);
position.set("timingAdvance", buf.readUnsignedByte() * 0.5);
position.set("airTemp", buf.readUnsignedByte() - 40);
position.set("airFlow", buf.readUnsignedShort() * 0.01);
position.set(Position.KEY_THROTTLE, buf.readUnsignedByte() / 255.0);
break;
case 0x0020:
String[] cells = buf.readCharSequence(
length, StandardCharsets.US_ASCII).toString().split("\\+");
for (String cell : cells) {
String[] values = cell.split("@");
network.addCellTower(CellTower.from(
Integer.parseInt(values[0]), Integer.parseInt(values[1]),
Integer.parseInt(values[2], 16), Long.parseLong(values[3], 16)));
}
break;
case 0x0021:
String[] points = buf.readCharSequence(
length, StandardCharsets.US_ASCII).toString().split("\\+");
for (String point : points) {
String[] values = point.split("@");
network.addWifiAccessPoint(WifiAccessPoint.from(values[0], Integer.parseInt(values[1])));
}
break;
default:
buf.skipBytes(length);
break;
}
buf.readerIndex(endIndex);
}
if (network.getCellTowers() != null || network.getWifiAccessPoints() != null) {
position.setNetwork(network);
}
sendResponse(channel, MSG_POSITION_RSP, index, null);
return position;
}
}
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