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/*
* Copyright 2017 - 2020 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.BitUtil;
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.JsonNumber;
import javax.json.JsonObject;
import javax.json.JsonString;
import javax.json.JsonValue;
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);
}
private boolean jsonContains(JsonObject json, String key) {
if (json.containsKey(key)) {
JsonValue value = json.get(key);
if (value.getValueType() == JsonValue.ValueType.STRING) {
return !((JsonString) value).getString().equals("null");
} else {
return true;
}
}
return false;
}
private boolean getJsonBoolean(JsonObject json, String key) {
JsonValue value = json.get(key);
if (value != null) {
if (value.getValueType() == JsonValue.ValueType.STRING) {
return Boolean.parseBoolean(((JsonString) value).getString());
} else {
return value.getValueType() == JsonValue.ValueType.TRUE;
}
}
return false;
}
private int getJsonInt(JsonObject json, String key) {
JsonValue value = json.get(key);
if (value != null) {
if (value.getValueType() == JsonValue.ValueType.NUMBER) {
return ((JsonNumber) value).intValue();
} else if (value.getValueType() == JsonValue.ValueType.STRING) {
return Integer.parseInt(((JsonString) value).getString());
}
}
return 0;
}
private double getJsonDouble(JsonObject json, String key) {
JsonValue value = json.get(key);
if (value != null) {
if (value.getValueType() == JsonValue.ValueType.NUMBER) {
return ((JsonNumber) value).doubleValue();
} else if (value.getValueType() == JsonValue.ValueType.STRING) {
return Double.parseDouble(((JsonString) value).getString());
}
}
return 0;
}
@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();
String deviceId;
if (json.containsKey("device")) {
deviceId = json.getString("device");
} else {
deviceId = json.getString("deviceId");
}
DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, deviceId);
if (deviceSession == null) {
sendResponse(channel, HttpResponseStatus.BAD_REQUEST);
return null;
}
Position position = new Position(getProtocolName());
position.setDeviceId(deviceSession.getDeviceId());
if (jsonContains(json, "time")) {
position.setTime(new Date(getJsonInt(json, "time") * 1000L));
} else if (jsonContains(json, "positionTime")) {
position.setTime(new Date(getJsonInt(json, "positionTime") * 1000L));
} else {
position.setTime(new Date());
}
if (jsonContains(json, "lastSeen")) {
position.setDeviceTime(new Date(getJsonInt(json, "lastSeen") * 1000L));
}
if (jsonContains(json, "location")
|| jsonContains(json, "lat") && jsonContains(json, "lng") && !jsonContains(json, "data")
|| jsonContains(json, "latitude") && jsonContains(json, "longitude") && !jsonContains(json, "data")) {
JsonObject location;
if (jsonContains(json, "location")) {
location = json.getJsonObject("location");
} else {
location = json;
}
position.setValid(true);
position.setLatitude(getJsonDouble(location, jsonContains(location, "lat") ? "lat" : "latitude"));
position.setLongitude(getJsonDouble(location, jsonContains(location, "lng") ? "lng" : "longitude"));
} else if (jsonContains(json, "data")) {
ByteBuf buf = Unpooled.wrappedBuffer(DataConverter.parseHex(json.getString("data")));
try {
int event = buf.readUnsignedByte();
if (event == 0x0f || event == 0x1f) {
position.setValid(event >> 4 > 0);
long value;
value = buf.readUnsignedInt();
position.setLatitude(BitUtil.to(value, 31) * 0.000001);
if (BitUtil.check(value, 31)) {
position.setLatitude(-position.getLatitude());
}
value = buf.readUnsignedInt();
position.setLongitude(BitUtil.to(value, 31) * 0.000001);
if (BitUtil.check(value, 31)) {
position.setLongitude(-position.getLongitude());
}
position.set(Position.KEY_BATTERY, (int) buf.readUnsignedByte());
} else if (event >> 4 <= 3 && buf.writerIndex() == 12) {
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 {
return null;
}
}
} finally {
buf.release();
}
} else if (jsonContains(json, "payload")) {
ByteBuf buf = Unpooled.wrappedBuffer(DataConverter.parseHex(json.getString("payload")));
try {
int event = buf.readUnsignedByte();
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 (jsonContains(json, "moving")) {
position.set(Position.KEY_MOTION, getJsonBoolean(json, "moving"));
}
if (jsonContains(json, "magStatus")) {
position.set(Position.KEY_BLOCKED, getJsonBoolean(json, "magStatus"));
}
if (jsonContains(json, "temperature")) {
position.set(Position.KEY_DEVICE_TEMP, getJsonDouble(json, "temperature"));
}
if (jsonContains(json, "rssi")) {
position.set(Position.KEY_RSSI, getJsonDouble(json, "rssi"));
}
if (jsonContains(json, "seqNumber")) {
position.set(Position.KEY_INDEX, getJsonInt(json, "seqNumber"));
}
sendResponse(channel, HttpResponseStatus.OK);
return position;
}
}
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