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/*
* Copyright 2013 - 2015 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.net.SocketAddress;
import java.util.Date;
import org.jboss.netty.buffer.ChannelBuffer;
import org.jboss.netty.channel.Channel;
import org.traccar.BaseProtocolDecoder;
import org.traccar.helper.Crc;
import org.traccar.helper.UnitsConverter;
import org.traccar.model.Event;
import org.traccar.model.Position;
public class AplicomProtocolDecoder extends BaseProtocolDecoder {
public AplicomProtocolDecoder(AplicomProtocol protocol) {
super(protocol);
}
private static final long IMEI_BASE_TC65_V20 = 0x1437207000000L;
private static final long IMEI_BASE_TC65_V28 = 358244010000000L;
private static final long IMEI_BASE_TC65I_V11 = 0x14143B4000000L;
private static boolean validateImei(long imei) {
return Crc.luhnChecksum(imei / 10) == imei % 10;
}
private static long imeiFromUnitId(long unitId) {
if (unitId == 0) {
return 0;
} else {
// Try TC65i
long imei = IMEI_BASE_TC65I_V11 + unitId;
if (validateImei(imei)) {
return imei;
}
// Try TC65 v2.8
imei = IMEI_BASE_TC65_V28 + ((unitId + 0xA8180) & 0xFFFFFF);
if (validateImei(imei)) {
return imei;
}
// Try TC65 v2.0
imei = IMEI_BASE_TC65_V20 + unitId;
if (validateImei(imei)) {
return imei;
}
}
return unitId;
}
private static final int DEFAULT_SELECTOR = 0x0002FC;
private static final int EVENT_DATA = 119;
@Override
protected Object decode(
Channel channel, SocketAddress remoteAddress, Object msg)
throws Exception {
ChannelBuffer buf = (ChannelBuffer) msg;
buf.readUnsignedByte(); // marker
int version = buf.readUnsignedByte();
String imei;
if ((version & 0x80) != 0) {
imei = String.valueOf((buf.readUnsignedInt() << (3 * 8)) | buf.readUnsignedMedium());
} else {
imei = String.valueOf(imeiFromUnitId(buf.readUnsignedMedium()));
}
buf.readUnsignedShort(); // length
// Selector
int selector = DEFAULT_SELECTOR; // default selector
if ((version & 0x40) != 0) {
selector = buf.readUnsignedMedium();
}
// Create new position
Position position = new Position();
position.setProtocol(getProtocolName());
if (!identify(imei, channel)) {
return null;
}
position.setDeviceId(getDeviceId());
// Event
int event = buf.readUnsignedByte();
position.set(Event.KEY_EVENT, event);
buf.readUnsignedByte();
// Validity
if ((selector & 0x0008) != 0) {
position.setValid((buf.readUnsignedByte() & 0x40) != 0);
} else {
return null; // no location data
}
// Time
if ((selector & 0x0004) != 0) {
buf.skipBytes(4); // snapshot time
}
// Location
if ((selector & 0x0008) != 0) {
position.setTime(new Date(buf.readUnsignedInt() * 1000));
position.setLatitude(buf.readInt() / 1000000.0);
position.setLongitude(buf.readInt() / 1000000.0);
position.set(Event.KEY_SATELLITES, buf.readUnsignedByte());
}
// Speed and heading
if ((selector & 0x0010) != 0) {
position.setSpeed(UnitsConverter.knotsFromKph(buf.readUnsignedByte()));
buf.readUnsignedByte(); // maximum speed
position.setCourse(buf.readUnsignedByte() * 2.0);
}
// Input
if ((selector & 0x0040) != 0) {
position.set(Event.KEY_INPUT, buf.readUnsignedByte());
}
// ADC
if ((selector & 0x0020) != 0) {
position.set(Event.PREFIX_ADC + 1, buf.readUnsignedShort());
position.set(Event.PREFIX_ADC + 2, buf.readUnsignedShort());
position.set(Event.PREFIX_ADC + 3, buf.readUnsignedShort());
position.set(Event.PREFIX_ADC + 4, buf.readUnsignedShort());
}
// Power
if ((selector & 0x8000) != 0) {
position.set(Event.KEY_POWER, buf.readUnsignedShort() / 1000.0);
position.set(Event.KEY_BATTERY, buf.readUnsignedShort());
}
// Pulse rate 1
if ((selector & 0x10000) != 0) {
buf.readUnsignedShort();
buf.readUnsignedInt();
}
// Pulse rate 2
if ((selector & 0x20000) != 0) {
buf.readUnsignedShort();
buf.readUnsignedInt();
}
// Trip 1
if ((selector & 0x0080) != 0) {
position.set("trip1", buf.readUnsignedInt());
}
// Trip 2
if ((selector & 0x0100) != 0) {
position.set("trip2", buf.readUnsignedInt());
}
// Output
if ((selector & 0x0040) != 0) {
position.set(Event.KEY_OUTPUT, buf.readUnsignedByte());
}
// Button
if ((selector & 0x0200) != 0) {
buf.skipBytes(6);
}
// Keypad
if ((selector & 0x0400) != 0) {
buf.readUnsignedByte();
}
// Altitude
if ((selector & 0x0800) != 0) {
position.setAltitude(buf.readShort());
}
// Snapshot counter
if ((selector & 0x2000) != 0) {
buf.readUnsignedShort();
}
// State flags
if ((selector & 0x4000) != 0) {
buf.skipBytes(8);
}
// Cell info
if ((selector & 0x80000) != 0) {
buf.skipBytes(11);
}
// Event specific data
if ((selector & 0x1000) != 0) {
switch (event) {
case 2:
case 40:
buf.readUnsignedByte();
break;
case 9:
buf.readUnsignedMedium();
break;
case 31:
case 32:
buf.readUnsignedShort();
break;
case 38:
buf.skipBytes(4 * 9);
break;
case 113:
buf.readUnsignedInt();
buf.readUnsignedByte();
break;
case 121:
case 142:
buf.readLong();
break;
case 130:
buf.readUnsignedInt(); // incorrect
break;
}
}
return position;
}
}
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