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/*
* Copyright 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.channel.Channel;
import org.traccar.BaseProtocolDecoder;
import org.traccar.Protocol;
import org.traccar.config.Keys;
import org.traccar.helper.UnitsConverter;
import org.traccar.helper.model.AttributeUtil;
import org.traccar.model.Position;
import org.traccar.session.DeviceSession;
import java.net.SocketAddress;
import java.nio.charset.StandardCharsets;
import java.util.Arrays;
import java.util.Date;
import java.util.List;
import java.util.stream.Collectors;
public class T622IridiumProtocolDecoder extends BaseProtocolDecoder {
private String format;
public T622IridiumProtocolDecoder(Protocol protocol) {
super(protocol);
}
public List<Integer> getParameters(long deviceId) {
String value = AttributeUtil.lookup(
getCacheManager(), Keys.PROTOCOL_FORMAT.withPrefix(getProtocolName()), deviceId);
return Arrays.stream((value != null ? value : format).split(","))
.map(s -> Integer.parseInt(s, 16))
.collect(Collectors.toList());
}
public void setFormat(String format) {
this.format = format;
}
@Override
protected Object decode(
Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
ByteBuf buf = (ByteBuf) msg;
buf.readUnsignedByte(); // protocol revision
buf.readUnsignedShort(); // length
buf.readUnsignedByte(); // header indicator
buf.readUnsignedShort(); // header length
buf.readUnsignedInt(); // reference
String imei = buf.readCharSequence(15, StandardCharsets.US_ASCII).toString();
DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, imei);
if (deviceSession == null) {
return null;
}
buf.readUnsignedByte(); // session status
buf.readUnsignedShort(); // originator index
buf.readUnsignedShort(); // transfer index
buf.readUnsignedInt(); // session time
buf.readUnsignedByte(); // payload indicator
buf.readUnsignedShort(); // payload length
Position position = new Position(getProtocolName());
position.setDeviceId(deviceSession.getDeviceId());
List<Integer> parameters = getParameters(deviceSession.getDeviceId());
for (int parameter : parameters) {
switch (parameter) {
case 0x01 -> position.set(Position.KEY_EVENT, buf.readUnsignedByte());
case 0x02 -> position.setLatitude(buf.readIntLE() / 1000000.0);
case 0x03 -> position.setLongitude(buf.readIntLE() / 1000000.0);
case 0x04 -> position.setTime(new Date((buf.readUnsignedIntLE() + 946684800) * 1000));
case 0x05 -> position.setValid(buf.readUnsignedByte() > 0);
case 0x06 -> position.set(Position.KEY_SATELLITES, buf.readUnsignedByte());
case 0x07 -> position.set(Position.KEY_RSSI, buf.readUnsignedByte());
case 0x08 -> position.setSpeed(UnitsConverter.knotsFromKph(buf.readUnsignedShortLE()));
case 0x09 -> position.setCourse(buf.readUnsignedShortLE());
case 0x0A -> position.set(Position.KEY_HDOP, buf.readUnsignedByte() * 0.1);
case 0x0B -> position.setAltitude(buf.readShortLE());
case 0x0C -> position.set(Position.KEY_ODOMETER, buf.readUnsignedIntLE());
case 0x0D -> position.set(Position.KEY_HOURS, buf.readUnsignedIntLE() * 1000);
case 0x14 -> position.set(Position.KEY_OUTPUT, buf.readUnsignedByte());
case 0x15 -> position.set(Position.KEY_INPUT, buf.readUnsignedByte());
case 0x19 -> position.set(Position.KEY_BATTERY, buf.readUnsignedShortLE() * 0.01);
case 0x1A -> position.set(Position.KEY_POWER, buf.readUnsignedShortLE() * 0.01);
case 0x1B -> buf.readUnsignedByte(); // geofence
}
}
return position;
}
}
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