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/*
* Copyright 2014 - 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.Unpooled;
import io.netty.channel.Channel;
import io.netty.handler.codec.http.FullHttpRequest;
import io.netty.handler.codec.http.HttpResponseStatus;
import io.netty.handler.codec.http.QueryStringDecoder;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.traccar.BaseHttpProtocolDecoder;
import org.traccar.WebDataHandler;
import org.traccar.session.DeviceSession;
import org.traccar.Protocol;
import org.traccar.helper.BitUtil;
import org.traccar.helper.DateBuilder;
import org.traccar.helper.NMEA;
import org.traccar.model.Position;
import java.net.SocketAddress;
import java.nio.charset.StandardCharsets;
import java.util.Date;
import java.util.LinkedList;
import java.util.List;
public class PiligrimProtocolDecoder extends BaseHttpProtocolDecoder {
private static final Logger LOGGER = LoggerFactory.getLogger(WebDataHandler.class);
public PiligrimProtocolDecoder(Protocol protocol) {
super(protocol);
}
private void sendResponse(Channel channel, String message) {
sendResponse(channel, HttpResponseStatus.OK, Unpooled.copiedBuffer(message, StandardCharsets.US_ASCII));
}
public static final int MSG_GPS = 0xF1;
public static final int MSG_GPS_SENSORS = 0xF2;
public static final int MSG_EVENTS = 0xF3;
@Override
protected Object decode(
Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
FullHttpRequest request = (FullHttpRequest) msg;
String uri = request.uri();
if (uri.startsWith("/config")) {
sendResponse(channel, "CONFIG: OK");
} else if (uri.startsWith("/addlog")) {
sendResponse(channel, "ADDLOG: OK");
} else if (uri.startsWith("/inform")) {
sendResponse(channel, "INFORM: OK");
} else if (uri.startsWith("/bingps")) {
sendResponse(channel, "BINGPS: OK");
QueryStringDecoder decoder = new QueryStringDecoder(request.uri());
DeviceSession deviceSession = getDeviceSession(
channel, remoteAddress, decoder.parameters().get("imei").get(0));
if (deviceSession == null) {
return null;
}
List<Position> positions = new LinkedList<>();
ByteBuf buf = request.content();
while (buf.readableBytes() > 2) {
buf.readUnsignedByte(); // header
int type = buf.readUnsignedByte();
buf.readUnsignedByte(); // length
if (type == MSG_GPS || type == MSG_GPS_SENSORS) {
Position position = new Position(getProtocolName());
position.setDeviceId(deviceSession.getDeviceId());
DateBuilder dateBuilder = new DateBuilder()
.setDay(buf.readUnsignedByte())
.setMonth(buf.getByte(buf.readerIndex()) & 0x0f)
.setYear(2010 + (buf.readUnsignedByte() >> 4))
.setTime(buf.readUnsignedByte(), buf.readUnsignedByte(), buf.readUnsignedByte());
position.setTime(dateBuilder.getDate());
double latitude = buf.readUnsignedByte();
latitude += buf.readUnsignedByte() / 60.0;
latitude += buf.readUnsignedByte() / 6000.0;
latitude += buf.readUnsignedByte() / 600000.0;
double longitude = buf.readUnsignedByte();
longitude += buf.readUnsignedByte() / 60.0;
longitude += buf.readUnsignedByte() / 6000.0;
longitude += buf.readUnsignedByte() / 600000.0;
int flags = buf.readUnsignedByte();
if (BitUtil.check(flags, 0)) {
latitude = -latitude;
}
if (BitUtil.check(flags, 1)) {
longitude = -longitude;
}
position.setLatitude(latitude);
position.setLongitude(longitude);
int satellites = buf.readUnsignedByte();
position.set(Position.KEY_SATELLITES, satellites);
position.setValid(satellites >= 3);
position.setSpeed(buf.readUnsignedByte());
double course = buf.readUnsignedByte() << 1;
course += (flags >> 2) & 1;
course += buf.readUnsignedByte() / 100.0;
position.setCourse(course);
if (type == MSG_GPS_SENSORS) {
double power = buf.readUnsignedByte();
power += buf.readUnsignedByte() << 8;
position.set(Position.KEY_POWER, power * 0.01);
double battery = buf.readUnsignedByte();
battery += buf.readUnsignedByte() << 8;
position.set(Position.KEY_BATTERY, battery * 0.01);
buf.skipBytes(6);
}
positions.add(position);
} else if (type == MSG_EVENTS) {
buf.skipBytes(13);
}
}
return positions;
} else if (uri.startsWith("/push.do")) {
sendResponse(channel, "PUSH.DO: OK");
/* Getting payload */
ByteBuf contentStream = request.content();
byte[] payloadBytes = new byte[Integer.parseInt(request.headers().get("Content-Length"))];
contentStream.readBytes(payloadBytes);
String payload = new String(payloadBytes);
/* Payload structure:
* &phone&message
*/
String[] payloadParts = payload.split("&");
/* LOGGER.debug("Payload parts: " + Arrays.toString(payloadParts)); */
String phoneNumber = payloadParts[1].substring(15);
DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, phoneNumber.substring(1));
if (deviceSession == null) {
return null;
}
/* TODO: use keys for flags in 'positions'. */
String message = payloadParts[2].substring(8).replaceFirst("[a-zA-Z! ]*; ", "");
/* LOGGER.debug("Phone number: " + phoneNumber); */
/* LOGGER.debug("Message: " + message); */
if (message.startsWith("$GPRMC")) {
/* Supported message structure:
* GPS NMEA Command; GSM info; Unknown; Battery voltage?
* Example: $GPRMC,180752.000,A,5314.0857,N,03421.8173,E,0.00,104.74,220722,,,A,V* 29,05; GSM: 250-01 0b54-0519,1c30,3e96,3ebe,412e 25; S; Batt: 405,M
*/
LOGGER.debug("Supported message");
String[] messageParts = message.split(";");
/* LOGGER.debug("Message parts: " + Arrays.toString(messageParts)); */
/* Parsing GPS */
String unprocessedGpsCommand = messageParts[0];
/* Getting rid of checksum */
String gpsCommand = unprocessedGpsCommand.replaceFirst("A,V[*].*", "");
/* LOGGER.debug("GPS command: " + gpsCommand); */
NMEA gpsParser = new NMEA();
NMEA.GPSPosition gpsPosition = gpsParser.parse(gpsCommand);
/* LOGGER.debug("Time: " + gpsPosition.time); */
/* LOGGER.debug("Coordinates: " + gpsPosition.lat + " " + gpsPosition.lon); */
/* LOGGER.debug("Speed over ground: " + gpsPosition.velocity + " knots"); */
/* Parsing other fields */
/* String gsmInfo = messageParts[1]; */
/* String unknown = messageParts[2]; */
String batteryInfo = messageParts[messageParts.length - 1].substring(7).substring(0, 3);
/* LOGGER.debug("Battery: " + batteryInfo); */
/* Constructing response */
Position position = new Position(getProtocolName());
position.setDeviceId(deviceSession.getDeviceId());
position.setValid(true);
position.setLatitude(gpsPosition.lat);
position.setLongitude(gpsPosition.lon);
position.setTime(new Date(System.currentTimeMillis()));
position.setSpeed(gpsPosition.velocity);
position.setCourse(gpsPosition.dir);
position.setAccuracy(gpsPosition.quality);
position.setAltitude(gpsPosition.altitude);
position.set(Position.KEY_BATTERY, Integer.parseInt(batteryInfo) / 100);
LOGGER.debug("Supported message finish");
return position;
} else {
LOGGER.error("Unsupported message");
}
}
return null;
}
}
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