/*
* Copyright 2015 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 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.Checksum;
import org.traccar.helper.Parser;
import org.traccar.helper.PatternBuilder;
import org.traccar.model.CellTower;
import org.traccar.model.Network;
import org.traccar.model.Position;
import java.net.SocketAddress;
import java.nio.charset.StandardCharsets;
import java.util.regex.Pattern;
public class CityeasyProtocolDecoder extends BaseProtocolDecoder {
public CityeasyProtocolDecoder(CityeasyProtocol protocol) {
super(protocol);
}
private static final Pattern PATTERN = new PatternBuilder()
.groupBegin()
.number("(dddd)(dd)(dd)") // date (yyyymmdd)
.number("(dd)(dd)(dd),") // time (hhmmss)
.number("([AV]),") // validity
.number("(d+),") // satellites
.number("([NS]),(d+.d+),") // latitude
.number("([EW]),(d+.d+),") // longitude
.number("(d+.d),") // speed
.number("(d+.d),") // hdop
.number("(d+.d)") // altitude
.groupEnd("?").text(";")
.number("(d+),") // mcc
.number("(d+),") // mnc
.number("(d+),") // lac
.number("(d+)") // cell
.any()
.compile();
public static final int MSG_ADDRESS_REQUEST = 0x0001;
public static final int MSG_STATUS = 0x0002;
public static final int MSG_LOCATION_REPORT = 0x0003;
public static final int MSG_LOCATION_REQUEST = 0x0004;
public static final int MSG_LOCATION_INTERVAL = 0x0005;
public static final int MSG_PHONE_NUMBER = 0x0006;
public static final int MSG_MONITORING = 0x0007;
public static final int MSG_TIMEZONE = 0x0008;
@Override
protected Object decode(
Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
ChannelBuffer buf = (ChannelBuffer) msg;
buf.skipBytes(2); // header
buf.readUnsignedShort(); // length
String imei = ChannelBuffers.hexDump(buf.readBytes(7));
DeviceSession deviceSession = getDeviceSession(
channel, remoteAddress, imei, imei + Checksum.luhn(Long.parseLong(imei)));
if (deviceSession == null) {
return null;
}
int type = buf.readUnsignedShort();
if (type == MSG_LOCATION_REPORT || type == MSG_LOCATION_REQUEST) {
String sentence = buf.toString(buf.readerIndex(), buf.readableBytes() - 8, StandardCharsets.US_ASCII);
Parser parser = new Parser(PATTERN, sentence);
if (!parser.matches()) {
return null;
}
Position position = new Position();
position.setProtocol(getProtocolName());
position.setDeviceId(deviceSession.getDeviceId());
if (parser.hasNext(15)) {
position.setTime(parser.nextDateTime());
position.setValid(parser.next().equals("A"));
position.set(Position.KEY_SATELLITES, parser.next());
position.setLatitude(parser.nextCoordinate(Parser.CoordinateFormat.HEM_DEG));
position.setLongitude(parser.nextCoordinate(Parser.CoordinateFormat.HEM_DEG));
position.setSpeed(parser.nextDouble(0));
position.set(Position.KEY_HDOP, parser.nextDouble(0));
position.setAltitude(parser.nextDouble(0));
} else {
getLastLocation(position, null);
}
position.setNetwork(new Network(CellTower.from(
parser.nextInt(0), parser.nextInt(0), parser.nextInt(0), parser.nextInt(0))));
return position;
}
return null;
}
}