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/*
* Copyright 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.channel.Channel;
import org.traccar.BaseProtocolDecoder;
import org.traccar.Context;
import org.traccar.DeviceSession;
import org.traccar.helper.UnitsConverter;
import org.traccar.model.Position;
import javax.xml.bind.DatatypeConverter;
import java.net.SocketAddress;
import java.nio.charset.StandardCharsets;
import java.util.Date;
import java.util.HashMap;
import java.util.Map;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
public class Xt2400ProtocolDecoder extends BaseProtocolDecoder {
public Xt2400ProtocolDecoder(Xt2400Protocol protocol) {
super(protocol);
String config = Context.getConfig().getString(getProtocolName() + ".config");
if (config != null) {
setConfig(config);
}
}
private static final Map<Integer, Integer> TAG_LENGTH_MAP = new HashMap<>();
static {
int[] l1 = {
0x01, 0x02, 0x04, 0x0b, 0x0c, 0x0d, 0x12, 0x13,
0x16, 0x17, 0x1c, 0x1f, 0x23, 0x2c, 0x2d, 0x30,
0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, 0x38,
0x39, 0x3a, 0x3b, 0x3c, 0x3d, 0x3e, 0x40, 0x41,
0x53, 0x66, 0x69, 0x6a, 0x93, 0x94, 0x96
};
int[] l2 = {
0x05, 0x09, 0x0a, 0x14, 0x15, 0x1d, 0x1e, 0x24,
0x26, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47, 0x48,
0x49, 0x57, 0x58, 0x59, 0x5a, 0x6b, 0x6f, 0x7A,
0x7B, 0x7C, 0x7d, 0x7E, 0x7F, 0x80, 0x81, 0x82,
0x83, 0x84, 0x85, 0x86
};
int[] l4 = {
0x03, 0x06, 0x07, 0x08, 0x0e, 0x0f, 0x10, 0x11,
0x18, 0x19, 0x1a, 0x1b, 0x20, 0x21, 0x22, 0x2e,
0x2f, 0x4a, 0x4b, 0x4c, 0x4d, 0x4e, 0x4f, 0x50,
0x51, 0x52, 0x54, 0x55, 0x56, 0x5b, 0x5c, 0x5d,
0x5e, 0x5f, 0x60, 0x61, 0x62, 0x68, 0x6e, 0x71,
0x72, 0x74, 0x75, 0x76, 0x77, 0x78, 0x79, 0x87,
0x88, 0x89, 0x8a, 0x8b, 0x8c, 0x8d
};
for (int i : l1) {
TAG_LENGTH_MAP.put(i, 1);
}
for (int i : l2) {
TAG_LENGTH_MAP.put(i, 2);
}
for (int i : l4) {
TAG_LENGTH_MAP.put(i, 4);
}
TAG_LENGTH_MAP.put(0x95, 24);
}
private static int getTagLength(int tag) {
Integer length = TAG_LENGTH_MAP.get(tag);
if (length == null) {
throw new IllegalArgumentException("Unknown tag: " + tag);
}
return length;
}
private Map<Short, byte[]> formats = new HashMap<>();
public void setConfig(String configString) {
Pattern pattern = Pattern.compile(":wycfg pcr\\[\\d+\\] ([0-9a-fA-F]{2})[0-9a-fA-F]{2}([0-9a-fA-F]+)");
Matcher matcher = pattern.matcher(configString);
while (matcher.find()) {
formats.put(Short.parseShort(matcher.group(1), 16), DatatypeConverter.parseHexBinary(matcher.group(2)));
}
}
@Override
protected Object decode(
Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
ChannelBuffer buf = (ChannelBuffer) msg;
byte[] format = null;
if (formats.size() > 1) {
format = formats.get(buf.getUnsignedByte(buf.readerIndex()));
} else if (!formats.isEmpty()) {
format = formats.values().iterator().next();
}
if (format == null) {
return null;
}
Position position = new Position(getProtocolName());
for (byte tag : format) {
switch ((int) tag) {
case 0x03:
DeviceSession deviceSession = getDeviceSession(
channel, remoteAddress, String.valueOf(buf.readUnsignedInt()));
if (deviceSession == null) {
return null;
}
position.setDeviceId(deviceSession.getDeviceId());
break;
case 0x04:
position.set(Position.KEY_EVENT, buf.readUnsignedByte());
break;
case 0x05:
position.set(Position.KEY_INDEX, buf.readUnsignedShort());
break;
case 0x06:
position.setTime(new Date(buf.readUnsignedInt() * 1000));
break;
case 0x07:
position.setLatitude(buf.readInt() * 0.000001);
break;
case 0x08:
position.setLongitude(buf.readInt() * 0.000001);
break;
case 0x09:
position.setAltitude(buf.readShort() * 0.1);
break;
case 0x0a:
position.setCourse(buf.readShort() * 0.1);
break;
case 0x0b:
position.setSpeed(UnitsConverter.knotsFromKph(buf.readUnsignedByte()));
break;
case 0x10:
position.set(Position.KEY_ODOMETER_TRIP, buf.readUnsignedInt());
break;
case 0x12:
position.set(Position.KEY_HDOP, buf.readUnsignedByte() * 0.1);
break;
case 0x13:
position.set(Position.KEY_SATELLITES, buf.readUnsignedByte());
break;
case 0x14:
position.set(Position.KEY_RSSI, buf.readShort());
break;
case 0x16:
position.set(Position.KEY_BATTERY, buf.readUnsignedByte() * 0.1);
break;
case 0x17:
position.set(Position.KEY_POWER, buf.readUnsignedByte() * 0.1);
break;
case 0x57:
position.set(Position.KEY_OBD_SPEED, UnitsConverter.knotsFromKph(buf.readUnsignedShort()));
break;
case 0x65:
position.set(Position.KEY_VIN, buf.readBytes(17).toString(StandardCharsets.US_ASCII));
break;
case 0x73:
position.set(Position.KEY_VERSION_FW, buf.readBytes(16).toString(StandardCharsets.US_ASCII).trim());
break;
default:
buf.skipBytes(getTagLength(tag));
break;
}
}
if (position.getLatitude() != 0 && position.getLongitude() != 0) {
position.setValid(true);
} else {
getLastLocation(position, position.getDeviceTime());
}
return position;
}
}
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