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/*
* Copyright 2013 - 2018 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.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.Position;
import java.net.SocketAddress;
import java.nio.charset.StandardCharsets;
import java.text.DateFormat;
import java.text.SimpleDateFormat;
public class NoranProtocolDecoder extends BaseProtocolDecoder {
public NoranProtocolDecoder(Protocol protocol) {
super(protocol);
}
public static final int MSG_UPLOAD_POSITION = 0x0008;
public static final int MSG_UPLOAD_POSITION_NEW = 0x0032;
public static final int MSG_CONTROL = 0x0002;
public static final int MSG_CONTROL_RESPONSE = 0x8009;
public static final int MSG_ALARM = 0x0003;
public static final int MSG_SHAKE_HAND = 0x0000;
public static final int MSG_SHAKE_HAND_RESPONSE = 0x8000;
public static final int MSG_IMAGE_SIZE = 0x0200;
public static final int MSG_IMAGE_PACKET = 0x0201;
@Override
protected Object decode(
Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
ByteBuf buf = (ByteBuf) msg;
buf.readUnsignedShortLE(); // length
int type = buf.readUnsignedShortLE();
if (type == MSG_SHAKE_HAND && channel != null) {
ByteBuf response = Unpooled.buffer(13);
response.writeCharSequence("\r\n*KW", StandardCharsets.US_ASCII);
response.writeByte(0);
response.writeShortLE(response.capacity());
response.writeShortLE(MSG_SHAKE_HAND_RESPONSE);
response.writeByte(1); // status
response.writeCharSequence("\r\n", StandardCharsets.US_ASCII);
channel.writeAndFlush(new NetworkMessage(response, remoteAddress));
} else if (type == MSG_UPLOAD_POSITION || type == MSG_UPLOAD_POSITION_NEW
|| type == MSG_CONTROL_RESPONSE || type == MSG_ALARM) {
boolean newFormat = false;
if (type == MSG_UPLOAD_POSITION && buf.readableBytes() == 48
|| type == MSG_ALARM && buf.readableBytes() == 48
|| type == MSG_CONTROL_RESPONSE && buf.readableBytes() == 57) {
newFormat = true;
}
Position position = new Position(getProtocolName());
if (type == MSG_CONTROL_RESPONSE) {
buf.readUnsignedIntLE(); // GIS ip
buf.readUnsignedIntLE(); // GIS port
}
position.setValid(BitUtil.check(buf.readUnsignedByte(), 0));
short alarm = buf.readUnsignedByte();
switch (alarm) {
case 1 -> position.set(Position.KEY_ALARM, Position.ALARM_SOS);
case 2 -> position.set(Position.KEY_ALARM, Position.ALARM_OVERSPEED);
case 3 -> position.set(Position.KEY_ALARM, Position.ALARM_GEOFENCE_EXIT);
case 9 -> position.set(Position.KEY_ALARM, Position.ALARM_POWER_OFF);
}
if (newFormat) {
position.setSpeed(UnitsConverter.knotsFromKph(buf.readUnsignedIntLE()));
position.setCourse(buf.readFloatLE());
} else {
position.setSpeed(UnitsConverter.knotsFromKph(buf.readUnsignedByte()));
position.setCourse(buf.readUnsignedShortLE());
}
position.setLongitude(buf.readFloatLE());
position.setLatitude(buf.readFloatLE());
if (!newFormat) {
long timeValue = buf.readUnsignedIntLE();
DateBuilder dateBuilder = new DateBuilder()
.setYear((int) BitUtil.from(timeValue, 26))
.setMonth((int) BitUtil.between(timeValue, 22, 26))
.setDay((int) BitUtil.between(timeValue, 17, 22))
.setHour((int) BitUtil.between(timeValue, 12, 17))
.setMinute((int) BitUtil.between(timeValue, 6, 12))
.setSecond((int) BitUtil.to(timeValue, 6));
position.setTime(dateBuilder.getDate());
}
ByteBuf rawId;
if (newFormat) {
rawId = buf.readSlice(12);
} else {
rawId = buf.readSlice(11);
}
String id = rawId.toString(StandardCharsets.US_ASCII).replaceAll("[^\\p{Print}]", "");
DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, id);
if (deviceSession == null) {
return null;
}
position.setDeviceId(deviceSession.getDeviceId());
if (newFormat) {
DateFormat dateFormat = new SimpleDateFormat("yy-MM-dd HH:mm:ss");
position.setTime(dateFormat.parse(buf.readSlice(17).toString(StandardCharsets.US_ASCII)));
buf.readByte();
}
if (!newFormat) {
position.set(Position.PREFIX_IO + 1, buf.readUnsignedByte());
position.set(Position.KEY_FUEL_LEVEL, buf.readUnsignedByte());
} else if (type == MSG_UPLOAD_POSITION_NEW) {
position.set(Position.PREFIX_TEMP + 1, buf.readShortLE());
position.set(Position.KEY_ODOMETER, buf.readFloatLE());
}
return position;
}
return null;
}
}
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