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/*
* Copyright 2016 - 2018 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 org.traccar.BaseProtocolDecoder;
import org.traccar.DeviceSession;
import org.traccar.NetworkMessage;
import org.traccar.Protocol;
import org.traccar.helper.BitUtil;
import org.traccar.helper.DateBuilder;
import org.traccar.helper.UnitsConverter;
import org.traccar.model.Position;
import java.net.SocketAddress;
import java.nio.charset.StandardCharsets;
public class OigoProtocolDecoder extends BaseProtocolDecoder {
public OigoProtocolDecoder(Protocol protocol) {
super(protocol);
}
public static final int MSG_AR_LOCATION = 0x00;
public static final int MSG_AR_REMOTE_START = 0x10;
public static final int MSG_ACKNOWLEDGEMENT = 0xE0;
private Position decodeArMessage(Channel channel, SocketAddress remoteAddress, ByteBuf buf) {
buf.skipBytes(1); // header
buf.readUnsignedShort(); // length
int type = buf.readUnsignedByte();
int tag = buf.readUnsignedByte();
DeviceSession deviceSession;
switch (BitUtil.to(tag, 3)) {
case 0:
String imei = ByteBufUtil.hexDump(buf.readSlice(8)).substring(1);
deviceSession = getDeviceSession(channel, remoteAddress, imei);
break;
case 1:
buf.skipBytes(1);
String meid = buf.readSlice(14).toString(StandardCharsets.US_ASCII);
deviceSession = getDeviceSession(channel, remoteAddress, meid);
break;
default:
deviceSession = getDeviceSession(channel, remoteAddress);
break;
}
if (deviceSession == null || type != MSG_AR_LOCATION) {
return null;
}
Position position = new Position(getProtocolName());
position.setDeviceId(deviceSession.getDeviceId());
position.set(Position.KEY_EVENT, buf.readUnsignedByte());
int mask = buf.readInt();
if (BitUtil.check(mask, 0)) {
position.set(Position.KEY_INDEX, buf.readUnsignedShort());
}
if (BitUtil.check(mask, 1)) {
int date = buf.readUnsignedByte();
DateBuilder dateBuilder = new DateBuilder()
.setDate(BitUtil.between(date, 4, 8) + 2010, BitUtil.to(date, 4), buf.readUnsignedByte())
.setTime(buf.readUnsignedByte(), buf.readUnsignedByte(), buf.readUnsignedByte());
position.setTime(dateBuilder.getDate());
}
if (BitUtil.check(mask, 2)) {
buf.skipBytes(5); // device time
}
if (BitUtil.check(mask, 3)) {
position.setLatitude(buf.readUnsignedInt() * 0.000001 - 90);
position.setLongitude(buf.readUnsignedInt() * 0.000001 - 180.0);
}
if (BitUtil.check(mask, 4)) {
int status = buf.readUnsignedByte();
position.setValid(BitUtil.between(status, 4, 8) != 0);
position.set(Position.KEY_SATELLITES, BitUtil.to(status, 4));
position.set(Position.KEY_HDOP, buf.readUnsignedByte() * 0.1);
}
if (BitUtil.check(mask, 5)) {
position.setSpeed(UnitsConverter.knotsFromKph(buf.readUnsignedByte()));
}
if (BitUtil.check(mask, 6)) {
position.setCourse(buf.readUnsignedShort());
}
if (BitUtil.check(mask, 7)) {
position.setAltitude(buf.readShort());
}
if (BitUtil.check(mask, 8)) {
position.set(Position.KEY_RSSI, buf.readUnsignedByte());
}
if (BitUtil.check(mask, 9)) {
position.set(Position.KEY_POWER, buf.readUnsignedShort() * 0.001);
}
if (BitUtil.check(mask, 10)) {
position.set(Position.KEY_BATTERY, buf.readUnsignedShort() * 0.001);
}
if (BitUtil.check(mask, 11)) {
buf.skipBytes(2); // gpio
}
if (BitUtil.check(mask, 12)) {
position.set(Position.KEY_ODOMETER, buf.readUnsignedInt() * 1000);
}
if (BitUtil.check(mask, 13)) {
buf.skipBytes(6); // software version
}
if (BitUtil.check(mask, 14)) {
buf.skipBytes(5); // hardware version
}
if (BitUtil.check(mask, 15)) {
buf.readUnsignedShort(); // device config
}
return position;
}
private double convertCoordinate(long value) {
boolean negative = value < 0;
value = Math.abs(value);
double minutes = (value % 100000) * 0.001;
value /= 100000;
double degrees = value + minutes / 60;
return negative ? -degrees : degrees;
}
private Position decodeMgMessage(Channel channel, SocketAddress remoteAddress, ByteBuf buf) {
buf.readUnsignedByte(); // tag
int flags = buf.getUnsignedByte(buf.readerIndex());
DeviceSession deviceSession;
if (BitUtil.check(flags, 6)) {
buf.readUnsignedByte(); // flags
deviceSession = getDeviceSession(channel, remoteAddress);
} else {
String imei = ByteBufUtil.hexDump(buf.readSlice(8)).substring(1);
deviceSession = getDeviceSession(channel, remoteAddress, imei);
}
if (deviceSession == null) {
return null;
}
Position position = new Position(getProtocolName());
position.setDeviceId(deviceSession.getDeviceId());
buf.skipBytes(8); // imsi
int date = buf.readUnsignedShort();
DateBuilder dateBuilder = new DateBuilder()
.setDate(2010 + BitUtil.from(date, 12), BitUtil.between(date, 8, 12), BitUtil.to(date, 8))
.setTime(buf.readUnsignedByte(), buf.readUnsignedByte(), 0);
position.setValid(true);
position.setLatitude(convertCoordinate(buf.readInt()));
position.setLongitude(convertCoordinate(buf.readInt()));
position.setAltitude(UnitsConverter.metersFromFeet(buf.readShort()));
position.setCourse(buf.readUnsignedShort());
position.setSpeed(UnitsConverter.knotsFromMph(buf.readUnsignedByte()));
position.set(Position.KEY_POWER, buf.readUnsignedByte() * 0.1);
position.set(Position.PREFIX_IO + 1, buf.readUnsignedByte());
dateBuilder.setSecond(buf.readUnsignedByte());
position.setTime(dateBuilder.getDate());
position.set(Position.KEY_RSSI, buf.readUnsignedByte());
int index = buf.readUnsignedByte();
position.set(Position.KEY_VERSION_FW, buf.readUnsignedByte());
position.set(Position.KEY_SATELLITES, buf.readUnsignedByte());
position.set(Position.KEY_ODOMETER, (long) (buf.readUnsignedInt() * 1609.34));
if (channel != null && BitUtil.check(flags, 7)) {
ByteBuf response = Unpooled.buffer();
response.writeByte(MSG_ACKNOWLEDGEMENT);
response.writeByte(index);
response.writeByte(0x00);
channel.writeAndFlush(new NetworkMessage(response, remoteAddress));
}
return position;
}
@Override
protected Object decode(
Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
ByteBuf buf = (ByteBuf) msg;
if (buf.getUnsignedByte(buf.readerIndex()) == 0x7e) {
return decodeArMessage(channel, remoteAddress, buf);
} else {
return decodeMgMessage(channel, remoteAddress, buf);
}
}
}
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