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/*
* Copyright 2014 - 2023 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.Unpooled;
import io.netty.channel.Channel;
import org.traccar.BaseProtocolDecoder;
import org.traccar.helper.BitUtil;
import org.traccar.helper.Checksum;
import org.traccar.session.DeviceSession;
import org.traccar.NetworkMessage;
import org.traccar.Protocol;
import org.traccar.helper.DateUtil;
import org.traccar.helper.UnitsConverter;
import org.traccar.model.Position;
import java.net.SocketAddress;
import java.nio.charset.StandardCharsets;
import java.text.DateFormat;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;
import java.util.Locale;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
public class TramigoProtocolDecoder extends BaseProtocolDecoder {
public TramigoProtocolDecoder(Protocol protocol) {
super(protocol);
}
private static final String[] DIRECTIONS = new String[] {"N", "NE", "E", "SE", "S", "SW", "W", "NW"};
@Override
protected Object decode(
Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
ByteBuf buf = (ByteBuf) msg;
int protocol = buf.readUnsignedByte();
if (protocol == 0x01) {
return decode01(channel, remoteAddress, buf);
} else if (protocol == 0x04) {
return decode04(channel, remoteAddress, buf);
} else if (protocol == 0x80) {
return decode80(channel, remoteAddress, buf);
}
return null;
}
private Position decode01(Channel channel, SocketAddress remoteAddress, ByteBuf buf) {
buf.readUnsignedByte(); // version id
int index = buf.readUnsignedShortLE();
int type = buf.readUnsignedShortLE();
if (type == 0x0100 || type == 0x00FE) {
buf.readUnsignedShort(); // length
buf.readUnsignedShort(); // mask
buf.readUnsignedShort(); // checksum
long id = buf.readUnsignedIntLE();
buf.readUnsignedInt(); // time
DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, String.valueOf(id));
if (deviceSession == null) {
return null;
}
Position position = new Position(getProtocolName());
position.setDeviceId(deviceSession.getDeviceId());
position.set(Position.KEY_INDEX, index);
// need to send ack?
buf.readUnsignedShortLE(); // report trigger
buf.readUnsignedShortLE(); // state flag
position.setValid(true);
position.setLatitude(buf.readUnsignedIntLE() * 0.0000001);
position.setLongitude(buf.readUnsignedIntLE() * 0.0000001);
position.set(Position.KEY_RSSI, buf.readUnsignedShortLE());
position.set(Position.KEY_SATELLITES, buf.readUnsignedShortLE());
position.set(Position.KEY_SATELLITES_VISIBLE, buf.readUnsignedShortLE());
position.set("gpsAntennaStatus", buf.readUnsignedShortLE());
position.setSpeed(buf.readUnsignedShortLE() * 0.194384);
position.setCourse(buf.readUnsignedShortLE());
position.set(Position.KEY_ODOMETER, buf.readUnsignedIntLE());
position.set(Position.KEY_BATTERY, buf.readUnsignedShortLE());
position.set(Position.KEY_CHARGE, buf.readUnsignedShortLE());
position.setTime(new Date(buf.readUnsignedIntLE() * 1000));
// parse other data
return position;
}
return null;
}
private Position decode04(Channel channel, SocketAddress remoteAddress, ByteBuf buf) {
buf.readUnsignedShortLE(); // length
buf.readUnsignedShortLE(); // checksum
int index = buf.readUnsignedShortLE();
long id1 = buf.readUnsignedIntLE();
long id2 = buf.readUnsignedIntLE();
long time = buf.readUnsignedIntLE();
String id = String.format("%08d%07d", id1, id2);
DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, id);
if (deviceSession == null) {
return null;
}
if (channel != null) {
ByteBuf response = Unpooled.buffer();
response.writeByte(0x04); // protocol
response.writeShortLE(24); // length
response.writeShortLE(0); // checksum
response.writeShortLE(index);
response.writeIntLE((int) id1);
response.writeIntLE((int) id2);
response.writeIntLE((int) time);
response.writeByte(0xff); // acknowledgement
response.writeShortLE(index);
response.writeShortLE(0); // success
response.setShortLE(3, Checksum.crc16(Checksum.CRC16_CCITT_FALSE, response.nioBuffer()));
channel.writeAndFlush(new NetworkMessage(response, channel.remoteAddress()));
}
Position position = new Position(getProtocolName());
position.setDeviceId(deviceSession.getDeviceId());
position.set(Position.KEY_INDEX, index);
position.setDeviceTime(new Date(time * 1000));
while (buf.isReadable()) {
int type = buf.readUnsignedByte();
switch (type) {
case 0 -> {
position.set(Position.KEY_EVENT, buf.readUnsignedShortLE());
buf.readUnsignedIntLE(); // event data
int status = buf.readUnsignedShortLE();
position.set(Position.KEY_IGNITION, BitUtil.check(status, 5));
position.set(Position.KEY_STATUS, status);
position.setValid(true);
position.setLatitude(buf.readIntLE() * 0.00001);
position.setLongitude(buf.readIntLE() * 0.00001);
position.setSpeed(UnitsConverter.knotsFromKph(buf.readUnsignedShortLE()));
position.setCourse(buf.readUnsignedShortLE());
position.set(Position.KEY_RSSI, buf.readUnsignedByte());
position.set(Position.KEY_GPS, buf.readUnsignedByte());
position.set(Position.KEY_BATTERY_LEVEL, buf.readUnsignedByte());
position.set(Position.KEY_ODOMETER_TRIP, buf.readUnsignedShortLE());
position.set("maxAcceleration", buf.readUnsignedShortLE() * 0.001);
position.set("maxDeceleration", buf.readUnsignedShortLE() * 0.001);
buf.readUnsignedShortLE(); // bearing to landmark
buf.readUnsignedIntLE(); // distance to landmark
position.setFixTime(new Date(buf.readUnsignedIntLE() * 1000));
buf.readUnsignedByte(); // reserved
}
case 1 -> buf.skipBytes(buf.readUnsignedShortLE() - 3); // landmark
case 4 -> buf.skipBytes(53); // trip
case 20 -> buf.skipBytes(32); // extended
case 22 -> {
buf.readUnsignedByte(); // zone flag
buf.skipBytes(buf.readUnsignedShortLE()); // zone name
}
case 30 -> buf.skipBytes(79); // system status
case 40 -> buf.skipBytes(40); // analog
case 50 -> buf.skipBytes(buf.readUnsignedShortLE() - 3); // console
case 255 -> buf.skipBytes(4); // acknowledgement
default -> throw new IllegalArgumentException(String.format("Unknown type %d", type));
}
}
return position.getValid() ? position : null;
}
private Position decode80(Channel channel, SocketAddress remoteAddress, ByteBuf buf) throws ParseException {
buf.readUnsignedByte(); // version id
int index = buf.readUnsignedShort();
buf.readUnsignedShort(); // type
buf.readUnsignedShort(); // length
buf.readUnsignedShort(); // mask
buf.readUnsignedShort(); // checksum
long id = buf.readUnsignedInt();
buf.readUnsignedInt(); // time
DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, String.valueOf(id));
if (deviceSession == null) {
return null;
}
Position position = new Position(getProtocolName());
position.setDeviceId(deviceSession.getDeviceId());
position.set(Position.KEY_INDEX, index);
if (channel != null) {
channel.writeAndFlush(new NetworkMessage(
Unpooled.copiedBuffer("gprs,ack," + index, StandardCharsets.US_ASCII), remoteAddress));
}
String sentence = buf.toString(StandardCharsets.US_ASCII);
Pattern pattern = Pattern.compile("(-?\\d+\\.\\d+), (-?\\d+\\.\\d+)");
Matcher matcher = pattern.matcher(sentence);
if (!matcher.find()) {
return null;
}
position.setLatitude(Double.parseDouble(matcher.group(1)));
position.setLongitude(Double.parseDouble(matcher.group(2)));
position.setValid(true);
pattern = Pattern.compile("([NSWE]{1,2}) with speed (\\d+) km/h");
matcher = pattern.matcher(sentence);
if (matcher.find()) {
for (int i = 0; i < DIRECTIONS.length; i++) {
if (matcher.group(1).equals(DIRECTIONS[i])) {
position.setCourse(i * 45.0);
break;
}
}
position.setSpeed(UnitsConverter.knotsFromKph(Double.parseDouble(matcher.group(2))));
}
pattern = Pattern.compile("(\\d{1,2}:\\d{2}(:\\d{2})? \\w{3} \\d{1,2})");
matcher = pattern.matcher(sentence);
if (!matcher.find()) {
return null;
}
DateFormat dateFormat = new SimpleDateFormat(
matcher.group(2) != null ? "HH:mm:ss MMM d yyyy" : "HH:mm MMM d yyyy", Locale.ENGLISH);
position.setTime(DateUtil.correctYear(
dateFormat.parse(matcher.group(1) + " " + Calendar.getInstance().get(Calendar.YEAR))));
if (sentence.contains("Ignition on detected")) {
position.set(Position.KEY_IGNITION, true);
} else if (sentence.contains("Ignition off detected")) {
position.set(Position.KEY_IGNITION, false);
}
return position;
}
}
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