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/*
* Copyright 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 org.jboss.netty.buffer.ChannelBuffer;
import org.jboss.netty.channel.Channel;
import org.traccar.BaseProtocolDecoder;
import org.traccar.DeviceSession;
import org.traccar.helper.BitUtil;
import org.traccar.model.Position;
import java.net.SocketAddress;
import java.util.Date;
import java.util.LinkedList;
import java.util.List;
public class EgtsProtocolDecoder extends BaseProtocolDecoder {
public EgtsProtocolDecoder(EgtsProtocol protocol) {
super(protocol);
}
public static final int SERVICE_AUTH = 1;
public static final int SERVICE_TELEDATA = 2;
public static final int SERVICE_COMMANDS = 4;
public static final int SERVICE_FIRMWARE = 9;
public static final int SERVICE_ECALL = 10;
public static final int MSG_RECORD_RESPONSE = 0;
public static final int MSG_TERM_IDENTITY = 1;
public static final int MSG_MODULE_DATA = 2;
public static final int MSG_VEHICLE_DATA = 3;
public static final int MSG_AUTH_PARAMS = 4;
public static final int MSG_AUTH_INFO = 5;
public static final int MSG_SERVICE_INFO = 6;
public static final int MSG_RESULT_CODE = 7;
public static final int MSG_POS_DATA = 16;
public static final int MSG_EXT_POS_DATA = 17;
public static final int MSG_AD_SENSORS_DATA = 18;
public static final int MSG_COUNTERS_DATA = 19;
public static final int MSG_STATE_DATA = 20;
public static final int MSG_LOOPIN_DATA = 22;
public static final int MSG_ABS_DIG_SENS_DATA = 23;
public static final int MSG_ABS_AN_SENS_DATA = 24;
public static final int MSG_ABS_CNTR_DATA = 25;
public static final int MSG_ABS_LOOPIN_DATA = 26;
public static final int MSG_LIQUID_LEVEL_SENSOR = 27;
public static final int MSG_PASSENGERS_COUNTERS = 28;
@Override
protected Object decode(
Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
ChannelBuffer buf = (ChannelBuffer) msg;
buf.skipBytes(buf.getUnsignedByte(buf.readerIndex() + 3));
DeviceSession deviceSession = null;
List<Position> positions = new LinkedList<>();
while (buf.readableBytes() > 2) {
int length = buf.readUnsignedShort();
buf.readUnsignedShort(); // index
int flags = buf.readUnsignedByte();
if (BitUtil.check(flags, 0)) {
String deviceId = String.valueOf(buf.readUnsignedInt());
if (deviceSession == null) {
deviceSession = getDeviceSession(channel, remoteAddress, deviceId);
}
}
if (deviceSession == null) {
deviceSession = getDeviceSession(channel, remoteAddress);
}
if (BitUtil.check(flags, 1)) {
buf.readUnsignedInt(); // event id
}
if (BitUtil.check(flags, 2)) {
buf.readUnsignedInt(); // time
}
buf.readUnsignedByte(); // source service type
buf.readUnsignedByte(); // recipient service type
int recordEnd = buf.readerIndex() + length;
while (buf.readerIndex() < recordEnd) {
int type = buf.readUnsignedByte();
int end = buf.readUnsignedShort() + buf.readerIndex();
if (type == MSG_POS_DATA) {
Position position = new Position(getProtocolName());
position.setDeviceId(deviceSession.getDeviceId());
position.setTime(new Date((buf.readUnsignedInt() + 1262304000) * 1000)); // since 2010-01-01
position.setLatitude(buf.readUnsignedInt() * 90.0 / 0xFFFFFFFFL);
position.setLongitude(buf.readUnsignedInt() * 180.0 / 0xFFFFFFFFL);
int positionFlags = buf.readUnsignedByte();
position.setValid(BitUtil.check(positionFlags, 0));
if (BitUtil.check(positionFlags, 5)) {
position.setLatitude(-position.getLatitude());
}
if (BitUtil.check(positionFlags, 6)) {
position.setLongitude(-position.getLongitude());
}
int speed = buf.readUnsignedShort();
position.setSpeed(BitUtil.to(speed, 14));
position.setCourse(buf.readUnsignedByte() + (BitUtil.check(speed, 15) ? 0x100 : 0));
position.set(Position.KEY_ODOMETER, buf.readUnsignedMedium() * 100);
position.set(Position.KEY_INPUT, buf.readUnsignedByte());
position.set(Position.KEY_EVENT, buf.readUnsignedByte());
if (BitUtil.check(positionFlags, 7)) {
position.setAltitude(buf.readMedium());
}
positions.add(position);
}
buf.readerIndex(end);
}
}
return positions.isEmpty() ? null : positions;
}
}
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