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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.helper.UnitsConverter;
import org.traccar.model.Position;
import org.traccar.session.DeviceSession;
import java.net.SocketAddress;
import java.nio.charset.StandardCharsets;
import java.util.Date;
public class T622IridiumProtocolDecoder extends BaseProtocolDecoder {
public T622IridiumProtocolDecoder(Protocol protocol) {
super(protocol);
}
@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());
position.set(Position.KEY_EVENT, buf.readUnsignedByte());
position.setLatitude(buf.readIntLE() / 1000000.0);
position.setLongitude(buf.readIntLE() / 1000000.0);
position.setTime(new Date((buf.readUnsignedIntLE() + 946713600) * 1000));
position.setValid(buf.readUnsignedByte() > 0);
position.set(Position.KEY_SATELLITES, buf.readUnsignedByte());
position.set(Position.KEY_RSSI, buf.readUnsignedByte());
position.setSpeed(UnitsConverter.knotsFromKph(buf.readUnsignedShortLE()));
position.setCourse(buf.readUnsignedShortLE());
position.set(Position.KEY_HDOP, buf.readUnsignedByte() * 0.1);
position.setAltitude(buf.readShortLE());
position.set(Position.KEY_ODOMETER, buf.readUnsignedIntLE());
position.set(Position.KEY_HOURS, buf.readUnsignedIntLE() * 1000);
position.set(Position.KEY_OUTPUT, buf.readUnsignedByte());
position.set(Position.KEY_INPUT, buf.readUnsignedByte());
position.set(Position.KEY_BATTERY, buf.readUnsignedShortLE() * 0.01);
position.set(Position.KEY_POWER, buf.readUnsignedShortLE() * 0.01);
buf.readUnsignedByte(); // geofence
return position;
}
}
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