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/*
* Copyright 2014 - 2017 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.buffer.ChannelBuffers;
import org.jboss.netty.channel.Channel;
import org.traccar.BaseProtocolDecoder;
import org.traccar.DeviceSession;
import org.traccar.helper.BitUtil;
import org.traccar.helper.UnitsConverter;
import org.traccar.model.CellTower;
import org.traccar.model.Network;
import org.traccar.model.Position;
import java.net.SocketAddress;
import java.util.Date;
public class EelinkProtocolDecoder extends BaseProtocolDecoder {
public EelinkProtocolDecoder(EelinkProtocol protocol) {
super(protocol);
}
public static final int MSG_LOGIN = 0x01;
public static final int MSG_GPS = 0x02;
public static final int MSG_HEARTBEAT = 0x03;
public static final int MSG_ALARM = 0x04;
public static final int MSG_STATE = 0x05;
public static final int MSG_SMS = 0x06;
public static final int MSG_OBD = 0x07;
public static final int MSG_DOWNLINK = 0x80;
public static final int MSG_DATA = 0x81;
public static final int MSG_NORMAL = 0x12;
public static final int MSG_WARNING = 0x14;
public static final int MSG_REPORT = 0x15;
public static final int MSG_COMMAND = 0x16;
public static final int MSG_OBD_DATA = 0x17;
public static final int MSG_OBD_BODY = 0x18;
public static final int MSG_OBD_CODE = 0x19;
public static final int MSG_CAMERA_INFO = 0x1E;
public static final int MSG_CAMERA_DATA = 0x1F;
private void sendResponse(Channel channel, int type, int index) {
if (channel != null) {
ChannelBuffer response = ChannelBuffers.buffer(7);
response.writeByte(0x67); response.writeByte(0x67); // header
response.writeByte(type);
response.writeShort(2); // length
response.writeShort(index);
channel.write(response);
}
}
private String decodeAlarm(Short value) {
switch (value) {
case 0x01:
return Position.ALARM_POWER_OFF;
case 0x02:
return Position.ALARM_SOS;
case 0x03:
return Position.ALARM_LOW_BATTERY;
case 0x04:
return Position.ALARM_VIBRATION;
case 0x08:
case 0x09:
return Position.ALARM_GPS_ANTENNA_CUT;
case 0x81:
return Position.ALARM_LOW_SPEED;
case 0x82:
return Position.ALARM_OVERSPEED;
case 0x83:
return Position.ALARM_GEOFENCE_ENTER;
case 0x84:
return Position.ALARM_GEOFENCE_EXIT;
case 0x85:
return Position.ALARM_ACCIDENT;
case 0x86:
return Position.ALARM_FALL_DOWN;
default:
return null;
}
}
private void decodeStatus(Position position, int status) {
if (BitUtil.check(status, 1)) {
position.set(Position.KEY_IGNITION, BitUtil.check(status, 2));
}
if (BitUtil.check(status, 3)) {
position.set(Position.KEY_ARMED, BitUtil.check(status, 4));
}
if (BitUtil.check(status, 5)) {
position.set(Position.KEY_BLOCKED, !BitUtil.check(status, 6));
}
if (BitUtil.check(status, 7)) {
position.set(Position.KEY_CHARGE, BitUtil.check(status, 8));
}
position.set(Position.KEY_STATUS, status);
}
private Position decodeOld(DeviceSession deviceSession, ChannelBuffer buf, int type, int index) {
Position position = new Position();
position.setDeviceId(deviceSession.getDeviceId());
position.setProtocol(getProtocolName());
position.set(Position.KEY_INDEX, index);
position.setTime(new Date(buf.readUnsignedInt() * 1000));
position.setLatitude(buf.readInt() / 1800000.0);
position.setLongitude(buf.readInt() / 1800000.0);
position.setSpeed(UnitsConverter.knotsFromKph(buf.readUnsignedByte()));
position.setCourse(buf.readUnsignedShort());
position.setNetwork(new Network(CellTower.from(
buf.readUnsignedShort(), buf.readUnsignedShort(), buf.readUnsignedShort(), buf.readUnsignedMedium())));
position.setValid((buf.readUnsignedByte() & 0x01) != 0);
if (type == MSG_ALARM) {
position.set(Position.KEY_ALARM, decodeAlarm(buf.readUnsignedByte()));
}
if (buf.readableBytes() >= 2) {
decodeStatus(position, buf.readUnsignedShort());
}
if (buf.readableBytes() >= 2 * 4) {
position.set(Position.KEY_BATTERY, buf.readUnsignedShort() * 0.001);
position.set(Position.KEY_RSSI, buf.readUnsignedShort());
position.set(Position.PREFIX_ADC + 1, buf.readUnsignedShort());
position.set(Position.PREFIX_ADC + 2, buf.readUnsignedShort());
}
return position;
}
private Position decodeNew(DeviceSession deviceSession, ChannelBuffer buf, int index) {
Position position = new Position();
position.setDeviceId(deviceSession.getDeviceId());
position.setProtocol(getProtocolName());
position.set(Position.KEY_INDEX, index);
position.setTime(new Date(buf.readUnsignedInt() * 1000));
int flags = buf.readUnsignedByte();
if (BitUtil.check(flags, 0)) {
position.setLatitude(buf.readInt() / 1800000.0);
position.setLongitude(buf.readInt() / 1800000.0);
position.setAltitude(buf.readShort());
position.setSpeed(UnitsConverter.knotsFromKph(buf.readUnsignedShort()));
position.setCourse(buf.readUnsignedShort());
position.set(Position.KEY_SATELLITES, buf.readUnsignedByte());
}
if (BitUtil.check(flags, 1)) {
position.setNetwork(new Network(CellTower.from(
buf.readUnsignedShort(), buf.readUnsignedShort(),
buf.readUnsignedShort(), buf.readUnsignedInt(), buf.readUnsignedByte())));
}
if (BitUtil.check(flags, 2)) {
buf.skipBytes(7); // bsid1
}
if (BitUtil.check(flags, 3)) {
buf.skipBytes(7); // bsid2
}
if (BitUtil.check(flags, 4)) {
buf.skipBytes(7); // bss0
}
if (BitUtil.check(flags, 5)) {
buf.skipBytes(7); // bss1
}
if (BitUtil.check(flags, 6)) {
buf.skipBytes(7); // bss2
}
return position;
}
@Override
protected Object decode(
Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
ChannelBuffer buf = (ChannelBuffer) msg;
buf.skipBytes(2); // header
int type = buf.readUnsignedByte();
buf.readShort(); // length
int index = buf.readUnsignedShort();
if (type != MSG_GPS && type != MSG_DATA) {
sendResponse(channel, type, index);
}
if (type == MSG_LOGIN) {
getDeviceSession(channel, remoteAddress, ChannelBuffers.hexDump(buf.readBytes(8)).substring(1));
} else {
DeviceSession deviceSession = getDeviceSession(channel, remoteAddress);
if (deviceSession == null) {
return null;
}
if (type == MSG_GPS || type == MSG_ALARM || type == MSG_STATE || type == MSG_SMS) {
return decodeOld(deviceSession, buf, type, index);
} else if (type >= MSG_NORMAL && type <= MSG_OBD_CODE) {
return decodeNew(deviceSession, buf, index);
} else if (type == MSG_HEARTBEAT && buf.readableBytes() >= 2) {
Position position = new Position();
position.setDeviceId(deviceSession.getDeviceId());
position.setProtocol(getProtocolName());
getLastLocation(position, null);
decodeStatus(position, buf.readUnsignedShort());
return position;
}
}
return null;
}
}
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