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/*
* Copyright 2013 - 2014 Anton Tananaev (anton.tananaev@gmail.com)
*
* 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 org.jboss.netty.buffer.ChannelBuffer;
import org.jboss.netty.buffer.ChannelBuffers;
import org.jboss.netty.channel.Channel;
import org.traccar.BaseProtocolDecoder;
import org.traccar.DeviceSession;
import org.traccar.helper.UnitsConverter;
import org.traccar.model.Position;
import java.net.SocketAddress;
import java.util.Date;
import java.util.LinkedList;
import java.util.List;
public class RuptelaProtocolDecoder extends BaseProtocolDecoder {
public RuptelaProtocolDecoder(RuptelaProtocol protocol) {
super(protocol);
}
private static final int COMMAND_RECORDS = 0x01;
@Override
protected Object decode(
Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
ChannelBuffer buf = (ChannelBuffer) msg;
buf.readUnsignedShort(); // data length
String imei = String.format("%015d", buf.readLong());
DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, imei);
if (deviceSession == null) {
return null;
}
int type = buf.readUnsignedByte();
if (type == COMMAND_RECORDS) {
List<Position> positions = new LinkedList<>();
buf.readUnsignedByte(); // records left
int count = buf.readUnsignedByte();
for (int i = 0; i < count; i++) {
Position position = new Position();
position.setProtocol(getProtocolName());
position.setDeviceId(deviceSession.getDeviceId());
position.setTime(new Date(buf.readUnsignedInt() * 1000));
buf.readUnsignedByte(); // timestamp extension
buf.readUnsignedByte(); // priority (reserved)
position.setLongitude(buf.readInt() / 10000000.0);
position.setLatitude(buf.readInt() / 10000000.0);
position.setAltitude(buf.readUnsignedShort() / 10.0);
position.setCourse(buf.readUnsignedShort() / 100.0);
int satellites = buf.readUnsignedByte();
position.set(Position.KEY_SATELLITES, satellites);
position.setValid(satellites >= 3);
position.setSpeed(UnitsConverter.knotsFromKph(buf.readUnsignedShort()));
position.set(Position.KEY_HDOP, buf.readUnsignedByte() / 10.0);
buf.readUnsignedByte();
// Read 1 byte data
int cnt = buf.readUnsignedByte();
for (int j = 0; j < cnt; j++) {
position.set(Position.PREFIX_IO + buf.readUnsignedByte(), buf.readUnsignedByte());
}
// Read 2 byte data
cnt = buf.readUnsignedByte();
for (int j = 0; j < cnt; j++) {
position.set(Position.PREFIX_IO + buf.readUnsignedByte(), buf.readUnsignedShort());
}
// Read 4 byte data
cnt = buf.readUnsignedByte();
for (int j = 0; j < cnt; j++) {
position.set(Position.PREFIX_IO + buf.readUnsignedByte(), buf.readUnsignedInt());
}
// Read 8 byte data
cnt = buf.readUnsignedByte();
for (int j = 0; j < cnt; j++) {
position.set(Position.PREFIX_IO + buf.readUnsignedByte(), buf.readLong());
}
positions.add(position);
}
if (channel != null) {
byte[] response = {0x00, 0x02, 0x64, 0x01, 0x13, (byte) 0xbc};
channel.write(ChannelBuffers.wrappedBuffer(response)); // acknowledgement
}
return positions;
}
return null;
}
}
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