diff options
Diffstat (limited to 'src/main/java/org/traccar/protocol/ThurayaProtocolDecoder.java')
| -rw-r--r-- | src/main/java/org/traccar/protocol/ThurayaProtocolDecoder.java | 195 |
1 files changed, 195 insertions, 0 deletions
diff --git a/src/main/java/org/traccar/protocol/ThurayaProtocolDecoder.java b/src/main/java/org/traccar/protocol/ThurayaProtocolDecoder.java new file mode 100644 index 000000000..a287ece34 --- /dev/null +++ b/src/main/java/org/traccar/protocol/ThurayaProtocolDecoder.java @@ -0,0 +1,195 @@ +/* + * Copyright 2022 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.NetworkMessage; +import org.traccar.Protocol; +import org.traccar.helper.BitUtil; +import org.traccar.helper.DateBuilder; +import org.traccar.model.Position; +import org.traccar.session.DeviceSession; + +import java.net.SocketAddress; +import java.nio.ByteBuffer; +import java.nio.charset.StandardCharsets; +import java.util.LinkedList; +import java.util.List; + +public class ThurayaProtocolDecoder extends BaseProtocolDecoder { + + public ThurayaProtocolDecoder(Protocol protocol) { + super(protocol); + } + + public static final int MSG_EVENT = 0x5101; + public static final int MSG_PERIODIC_REPORT = 0x7101; + public static final int MSG_SETTING_RESPONSE = 0x8115; + public static final int MSG_ACK = 0x9901; + + private static int checksum(ByteBuffer buf) { + int crc = 0; + while (buf.hasRemaining()) { + crc += buf.get(); + } + crc = ~crc; + crc += 1; + return crc; + } + + private void sendResponse(Channel channel, SocketAddress remoteAddress, long id, int type) { + if (channel != null) { + ByteBuf response = Unpooled.buffer(); + response.writeCharSequence("#T", StandardCharsets.US_ASCII); + response.writeShort(15); // length + response.writeShort(MSG_ACK); + response.writeInt((int) id); + response.writeShort(type); + response.writeShort(1); // server ok + response.writeShort(checksum(response.nioBuffer())); + channel.writeAndFlush(new NetworkMessage(response, remoteAddress)); + } + } + + private void decodeLocation(ByteBuf buf, Position position) { + + position.setValid(true); + + DateBuilder dateBuilder = new DateBuilder(); + + int date = buf.readInt(); + dateBuilder.setDay(date % 100); + date /= 100; + dateBuilder.setMonth(date % 100); + date /= 100; + dateBuilder.setYear(date); + + int time = buf.readInt(); + dateBuilder.setSecond(time % 100); + time /= 100; + dateBuilder.setMinute(time % 100); + time /= 100; + dateBuilder.setHour(time); + + position.setTime(dateBuilder.getDate()); + + position.setLongitude(buf.readInt() / 1000000.0); + position.setLatitude(buf.readInt() / 1000000.0); + + int data = buf.readUnsignedShort(); + + int ignition = BitUtil.from(data, 12); + if (ignition == 1) { + position.set(Position.KEY_IGNITION, true); + } else if (ignition == 2) { + position.set(Position.KEY_IGNITION, false); + } + + position.setCourse(BitUtil.to(data, 12)); + position.setSpeed(buf.readShort()); + + position.set(Position.KEY_RPM, buf.readShort()); + + position.set("data", readString(buf)); + } + + private String decodeAlarm(int event) { + switch (event) { + case 10: + return Position.ALARM_VIBRATION; + case 11: + return Position.ALARM_OVERSPEED; + case 12: + return Position.ALARM_POWER_CUT; + case 13: + return Position.ALARM_LOW_BATTERY; + case 18: + return Position.ALARM_GPS_ANTENNA_CUT; + case 20: + return Position.ALARM_ACCELERATION; + case 21: + return Position.ALARM_BRAKING; + default: + return null; + } + } + + private String readString(ByteBuf buf) { + int endIndex = buf.indexOf(buf.readerIndex(), buf.writerIndex(), (byte) 0); + CharSequence value = buf.readCharSequence(endIndex - buf.readerIndex(), StandardCharsets.US_ASCII); + buf.readUnsignedByte(); // delimiter + return value.toString(); + } + + @Override + protected Object decode( + Channel channel, SocketAddress remoteAddress, Object msg) throws Exception { + + ByteBuf buf = (ByteBuf) msg; + + buf.skipBytes(2); // service + buf.readUnsignedShort(); // length + int type = buf.readUnsignedShort(); + long id = buf.readUnsignedInt(); + + sendResponse(channel, remoteAddress, id, type); + + DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, String.valueOf(id)); + if (deviceSession == null) { + return null; + } + + if (type == MSG_EVENT) { + + Position position = new Position(getProtocolName()); + position.setDeviceId(deviceSession.getDeviceId()); + + decodeLocation(buf, position); + + int event = buf.readUnsignedByte(); + position.set(Position.KEY_ALARM, decodeAlarm(event)); + position.set(Position.KEY_EVENT, event); + position.set("eventData", readString(buf)); + + return position; + + } else if (type == MSG_PERIODIC_REPORT) { + + List<Position> positions = new LinkedList<>(); + + int count = buf.readUnsignedByte(); + for (int i = 0; i < count; i++) { + + Position position = new Position(getProtocolName()); + position.setDeviceId(deviceSession.getDeviceId()); + + decodeLocation(buf, position); + + positions.add(position); + + } + + return positions; + + } + + return null; + } + +} |