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/*
* Copyright 2017 - 2019 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.ByteBufUtil;
import io.netty.buffer.Unpooled;
import io.netty.channel.Channel;
import io.netty.handler.codec.http.FullHttpRequest;
import io.netty.handler.codec.http.HttpResponseStatus;
import org.traccar.BaseHttpProtocolDecoder;
import org.traccar.DeviceSession;
import org.traccar.Protocol;
import org.traccar.helper.DataConverter;
import org.traccar.helper.UnitsConverter;
import org.traccar.model.Network;
import org.traccar.model.Position;
import org.traccar.model.WifiAccessPoint;
import javax.json.Json;
import javax.json.JsonObject;
import java.io.StringReader;
import java.net.SocketAddress;
import java.net.URLDecoder;
import java.nio.charset.StandardCharsets;
import java.util.Date;
public class SigfoxProtocolDecoder extends BaseHttpProtocolDecoder {
public SigfoxProtocolDecoder(Protocol protocol) {
super(protocol);
}
@Override
protected Object decode(
Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
FullHttpRequest request = (FullHttpRequest) msg;
String content = request.content().toString(StandardCharsets.UTF_8);
if (!content.startsWith("{")) {
content = URLDecoder.decode(content.split("=")[0], "UTF-8");
}
JsonObject json = Json.createReader(new StringReader(content)).readObject();
DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, json.getString("device"));
if (deviceSession == null) {
sendResponse(channel, HttpResponseStatus.BAD_REQUEST);
return null;
}
Position position = new Position(getProtocolName());
position.setDeviceId(deviceSession.getDeviceId());
if (json.containsKey("time")) {
position.setTime(new Date(json.getInt("time") * 1000L));
} else {
position.setTime(new Date());
}
if (json.containsKey("location")) {
JsonObject location = json.getJsonObject("location");
position.setValid(true);
position.setLatitude(location.getJsonNumber("lat").doubleValue());
position.setLongitude(location.getJsonNumber("lng").doubleValue());
} else {
String data = json.getString(json.containsKey("data") ? "data" : "payload");
ByteBuf buf = Unpooled.wrappedBuffer(DataConverter.parseHex(data));
try {
int event = buf.readUnsignedByte();
if (event >> 4 == 0) {
position.setValid(true);
position.setLatitude(buf.readIntLE() * 0.0000001);
position.setLongitude(buf.readIntLE() * 0.0000001);
position.setCourse(buf.readUnsignedByte() * 2);
position.setSpeed(UnitsConverter.knotsFromKph(buf.readUnsignedByte()));
position.set(Position.KEY_BATTERY, buf.readUnsignedByte() * 0.025);
} else {
position.set(Position.KEY_EVENT, event);
if (event == 0x22 || event == 0x62) {
position.set(Position.KEY_ALARM, Position.ALARM_SOS);
}
while (buf.isReadable()) {
int type = buf.readUnsignedByte();
switch (type) {
case 0x01:
position.setValid(true);
position.setLatitude(buf.readMedium());
position.setLongitude(buf.readMedium());
break;
case 0x02:
position.setValid(true);
position.setLatitude(buf.readFloat());
position.setLongitude(buf.readFloat());
break;
case 0x03:
position.set(Position.PREFIX_TEMP + 1, buf.readByte() * 0.5);
break;
case 0x04:
position.set(Position.KEY_BATTERY, buf.readUnsignedByte() * 0.1);
break;
case 0x05:
position.set(Position.KEY_BATTERY_LEVEL, buf.readUnsignedByte());
break;
case 0x06:
String mac = ByteBufUtil.hexDump(buf.readSlice(6)).replaceAll("(..)", "$1:");
position.setNetwork(new Network(WifiAccessPoint.from(
mac.substring(0, mac.length() - 1), buf.readUnsignedByte())));
break;
case 0x07:
buf.skipBytes(10); // wifi extended
break;
case 0x08:
buf.skipBytes(6); // accelerometer
break;
case 0x09:
position.setSpeed(UnitsConverter.knotsFromKph(buf.readUnsignedByte()));
break;
default:
buf.readUnsignedByte(); // fence number
break;
}
}
}
} finally {
buf.release();
}
}
if (position.getLatitude() == 0 && position.getLongitude() == 0) {
getLastLocation(position, position.getDeviceTime());
}
if (json.containsKey("rssi")) {
position.set(Position.KEY_RSSI, json.getJsonNumber("rssi").doubleValue());
}
if (json.containsKey("seqNumber")) {
position.set(Position.KEY_INDEX, json.getInt("seqNumber"));
}
sendResponse(channel, HttpResponseStatus.OK);
return position;
}
}
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