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/*
* Copyright 2014 - 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.DeviceSession;
import org.traccar.NetworkMessage;
import org.traccar.Protocol;
import org.traccar.helper.DateBuilder;
import org.traccar.model.Position;
import java.net.SocketAddress;
import java.util.LinkedList;
import java.util.List;
public class OrionProtocolDecoder extends BaseProtocolDecoder {
public OrionProtocolDecoder(Protocol protocol) {
super(protocol);
}
public static final int MSG_USERLOG = 0;
public static final int MSG_SYSLOG = 3;
private static void sendResponse(Channel channel, ByteBuf buf) {
if (channel != null) {
ByteBuf response = Unpooled.buffer(4);
response.writeByte('*');
response.writeShort(buf.getUnsignedShort(buf.writerIndex() - 2));
response.writeByte(buf.getUnsignedByte(buf.writerIndex() - 3));
channel.writeAndFlush(new NetworkMessage(response, channel.remoteAddress()));
}
}
private static double convertCoordinate(int raw) {
int degrees = raw / 1000000;
double minutes = (raw % 1000000) / 10000.0;
return degrees + minutes / 60;
}
@Override
protected Object decode(
Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
ByteBuf buf = (ByteBuf) msg;
buf.skipBytes(2); // header
int type = buf.readUnsignedByte() & 0x0f;
if (type == MSG_USERLOG) {
int header = buf.readUnsignedByte();
if ((header & 0x40) != 0) {
sendResponse(channel, buf);
}
DeviceSession deviceSession = getDeviceSession(
channel, remoteAddress, String.valueOf(buf.readUnsignedInt()));
if (deviceSession == null) {
return null;
}
List<Position> positions = new LinkedList<>();
for (int i = 0; i < (header & 0x0f); i++) {
Position position = new Position(getProtocolName());
position.setDeviceId(deviceSession.getDeviceId());
position.set(Position.KEY_EVENT, buf.readUnsignedByte());
buf.readUnsignedByte(); // length
position.set(Position.KEY_FLAGS, buf.readUnsignedShortLE());
position.setLatitude(convertCoordinate(buf.readIntLE()));
position.setLongitude(convertCoordinate(buf.readIntLE()));
position.setAltitude(buf.readShortLE() / 10.0);
position.setCourse(buf.readUnsignedShortLE());
position.setSpeed(buf.readUnsignedShortLE() * 0.0539957);
DateBuilder dateBuilder = new DateBuilder()
.setDate(buf.readUnsignedByte(), buf.readUnsignedByte(), buf.readUnsignedByte())
.setTime(buf.readUnsignedByte(), buf.readUnsignedByte(), buf.readUnsignedByte());
position.setTime(dateBuilder.getDate());
int satellites = buf.readUnsignedByte();
position.setValid(satellites >= 3);
position.set(Position.KEY_SATELLITES, satellites);
positions.add(position);
}
return positions;
}
return null;
}
}
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