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/*
* Copyright 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 java.nio.ByteOrder;
import java.nio.charset.Charset;
import java.util.Calendar;
import java.util.LinkedList;
import java.util.List;
import java.util.TimeZone;
import org.jboss.netty.buffer.ChannelBuffer;
import org.jboss.netty.buffer.ChannelBuffers;
import org.jboss.netty.channel.Channel;
import org.jboss.netty.channel.ChannelHandlerContext;
import org.jboss.netty.handler.codec.http.DefaultHttpResponse;
import org.jboss.netty.handler.codec.http.HttpRequest;
import org.jboss.netty.handler.codec.http.HttpResponse;
import org.jboss.netty.handler.codec.http.HttpResponseStatus;
import org.jboss.netty.handler.codec.http.HttpVersion;
import org.jboss.netty.handler.codec.http.QueryStringDecoder;
import org.traccar.BaseProtocolDecoder;
import org.traccar.model.Event;
import org.traccar.model.Position;
public class PiligrimProtocolDecoder extends BaseProtocolDecoder {
public PiligrimProtocolDecoder(PiligrimProtocol protocol) {
super(protocol);
}
private void sendResponse(Channel channel, String message) {
if (channel != null) {
HttpResponse response = new DefaultHttpResponse(
HttpVersion.HTTP_1_1, HttpResponseStatus.OK);
response.setContent(ChannelBuffers.copiedBuffer(
ByteOrder.BIG_ENDIAN, message, Charset.defaultCharset()));
channel.write(response);
}
}
private static final int MSG_GPS = 0xF1;
private static final int MSG_GPS_SENSORS = 0xF2;
private static final int MSG_EVENTS = 0xF3;
@Override
protected Object decode(
ChannelHandlerContext ctx, Channel channel, Object msg)
throws Exception {
HttpRequest request = (HttpRequest) msg;
String uri = request.getUri();
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");
// Identification
QueryStringDecoder decoder = new QueryStringDecoder(request.getUri());
if (!identify(decoder.getParameters().get("imei").get(0), channel)) {
return null;
}
List<Position> positions = new LinkedList<Position>();
ChannelBuffer buf = request.getContent();
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();
position.setProtocol(getProtocolName());
position.setDeviceId(getDeviceId());
// Time
Calendar time = Calendar.getInstance(TimeZone.getTimeZone("UTC"));
time.clear();
time.set(Calendar.DAY_OF_MONTH, buf.readUnsignedByte());
time.set(Calendar.MONTH, (buf.getByte(buf.readerIndex()) & 0x0f) - 1);
time.set(Calendar.YEAR, 2010 + (buf.readUnsignedByte() >> 4));
time.set(Calendar.HOUR_OF_DAY, buf.readUnsignedByte());
time.set(Calendar.MINUTE, buf.readUnsignedByte());
time.set(Calendar.SECOND, buf.readUnsignedByte());
position.setTime(time.getTime());
// Latitude
double latitude = buf.readUnsignedByte();
latitude += buf.readUnsignedByte() / 60.0;
latitude += buf.readUnsignedByte() / 6000.0;
latitude += buf.readUnsignedByte() / 600000.0;
// Longitude
double longitude = buf.readUnsignedByte();
longitude += buf.readUnsignedByte() / 60.0;
longitude += buf.readUnsignedByte() / 6000.0;
longitude += buf.readUnsignedByte() / 600000.0;
// Hemisphere
int flags = buf.readUnsignedByte();
if ((flags & 0x01) != 0) latitude = -latitude;
if ((flags & 0x02) != 0) longitude = -longitude;
position.setLatitude(latitude);
position.setLongitude(longitude);
// Satellites
int satellites = buf.readUnsignedByte();
position.set(Event.KEY_SATELLITES, satellites);
position.setValid(satellites >= 3);
// Speed
position.setSpeed(buf.readUnsignedByte());
// Course
double course = buf.readUnsignedByte() << 1;
course += (flags >> 2) & 1;
course += buf.readUnsignedByte() / 100.0;
position.setCourse(course);
// Sensors
if (type == MSG_GPS_SENSORS) {
// External power
double power = buf.readUnsignedByte();
power += buf.readUnsignedByte() << 8;
position.set(Event.KEY_POWER, power / 100);
// Battery
double battery = buf.readUnsignedByte();
battery += buf.readUnsignedByte() << 8;
position.set(Event.KEY_BATTERY, battery / 100);
buf.skipBytes(6);
}
positions.add(position);
} else if (type == MSG_EVENTS) {
buf.skipBytes(13);
}
}
return positions;
}
return null;
}
}
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