Java tutorial
/* * Copyright 2015 - 2018 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.ByteBufUtil; import io.netty.channel.Channel; import org.traccar.BaseProtocolDecoder; import org.traccar.DeviceSession; import org.traccar.Protocol; import org.traccar.helper.BitUtil; import org.traccar.helper.DateBuilder; import org.traccar.model.CellTower; import org.traccar.model.Network; import org.traccar.model.Position; import java.net.SocketAddress; public class TzoneProtocolDecoder extends BaseProtocolDecoder { public TzoneProtocolDecoder(Protocol protocol) { super(protocol); } private String decodeAlarm(Short value) { switch (value) { case 0x01: return Position.ALARM_SOS; case 0x10: return Position.ALARM_LOW_BATTERY; case 0x11: return Position.ALARM_OVERSPEED; case 0x14: return Position.ALARM_BRAKING; case 0x15: return Position.ALARM_ACCELERATION; case 0x30: return Position.ALARM_PARKING; case 0x42: return Position.ALARM_GEOFENCE_EXIT; case 0x43: return Position.ALARM_GEOFENCE_ENTER; default: return null; } } private boolean decodeGps(Position position, ByteBuf buf, int hardware) { int blockLength = buf.readUnsignedShort(); int blockEnd = buf.readerIndex() + blockLength; if (blockLength < 22) { return false; } position.set(Position.KEY_SATELLITES, buf.readUnsignedByte()); double lat; double lon; if (hardware == 0x10A || hardware == 0x10B) { lat = buf.readUnsignedInt() / 600000.0; lon = buf.readUnsignedInt() / 600000.0; } else { lat = buf.readUnsignedInt() / 100000.0 / 60.0; lon = buf.readUnsignedInt() / 100000.0 / 60.0; } position.setFixTime( new DateBuilder().setDate(buf.readUnsignedByte(), buf.readUnsignedByte(), buf.readUnsignedByte()) .setTime(buf.readUnsignedByte(), buf.readUnsignedByte(), buf.readUnsignedByte()).getDate()); position.setSpeed(buf.readUnsignedShort() * 0.01); position.set(Position.KEY_ODOMETER, buf.readUnsignedMedium()); int flags = buf.readUnsignedShort(); position.setCourse(BitUtil.to(flags, 9)); if (!BitUtil.check(flags, 10)) { lat = -lat; } position.setLatitude(lat); if (BitUtil.check(flags, 9)) { lon = -lon; } position.setLongitude(lon); position.setValid(BitUtil.check(flags, 11)); buf.readerIndex(blockEnd); return true; } private void decodeCards(Position position, ByteBuf buf) { int index = 1; for (int i = 0; i < 4; i++) { int blockLength = buf.readUnsignedShort(); int blockEnd = buf.readerIndex() + blockLength; if (blockLength > 0) { int count = buf.readUnsignedByte(); for (int j = 0; j < count; j++) { int length = buf.readUnsignedByte(); boolean odd = length % 2 != 0; if (odd) { length += 1; } String num = ByteBufUtil.hexDump(buf.readSlice(length / 2)); if (odd) { num = num.substring(1); } position.set("card" + index, num); } } buf.readerIndex(blockEnd); } } private void decodePassengers(Position position, ByteBuf buf) { int blockLength = buf.readUnsignedShort(); int blockEnd = buf.readerIndex() + blockLength; if (blockLength > 0) { position.set("passengersOn", buf.readUnsignedMedium()); position.set("passengersOff", buf.readUnsignedMedium()); } buf.readerIndex(blockEnd); } private void decodeTags(Position position, ByteBuf buf) { int blockLength = buf.readUnsignedShort(); int blockEnd = buf.readerIndex() + blockLength; if (blockLength > 0) { buf.readUnsignedByte(); // tag type int count = buf.readUnsignedByte(); int tagLength = buf.readUnsignedByte(); for (int i = 1; i <= count; i++) { int tagEnd = buf.readerIndex() + tagLength; buf.readUnsignedByte(); // status buf.readUnsignedShortLE(); // battery voltage position.set(Position.PREFIX_TEMP + i, (buf.readShortLE() & 0x3fff) * 0.1); buf.readUnsignedByte(); // humidity buf.readUnsignedByte(); // rssi buf.readerIndex(tagEnd); } } buf.readerIndex(blockEnd); } @Override protected Object decode(Channel channel, SocketAddress remoteAddress, Object msg) throws Exception { ByteBuf buf = (ByteBuf) msg; buf.skipBytes(2); // header buf.readUnsignedShort(); // length if (buf.readUnsignedShort() != 0x2424) { return null; } int hardware = buf.readUnsignedShort(); long firmware = buf.readUnsignedInt(); String imei = ByteBufUtil.hexDump(buf.readSlice(8)).substring(1); DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, imei); if (deviceSession == null) { return null; } Position position = new Position(getProtocolName()); position.setDeviceId(deviceSession.getDeviceId()); position.set(Position.KEY_VERSION_HW, hardware); position.set(Position.KEY_VERSION_FW, firmware); position.setDeviceTime( new DateBuilder().setDate(buf.readUnsignedByte(), buf.readUnsignedByte(), buf.readUnsignedByte()) .setTime(buf.readUnsignedByte(), buf.readUnsignedByte(), buf.readUnsignedByte()).getDate()); // GPS info if (hardware == 0x406 || !decodeGps(position, buf, hardware)) { getLastLocation(position, position.getDeviceTime()); } // LBS info int blockLength = buf.readUnsignedShort(); int blockEnd = buf.readerIndex() + blockLength; if (blockLength > 0 && (hardware == 0x10A || hardware == 0x10B || hardware == 0x406)) { position.setNetwork( new Network(CellTower.fromLacCid(buf.readUnsignedShort(), buf.readUnsignedShort()))); } buf.readerIndex(blockEnd); // Status info blockLength = buf.readUnsignedShort(); blockEnd = buf.readerIndex() + blockLength; if (blockLength >= 13) { position.set(Position.KEY_ALARM, decodeAlarm(buf.readUnsignedByte())); position.set("terminalInfo", buf.readUnsignedByte()); int status = buf.readUnsignedByte(); position.set(Position.PREFIX_OUT + 1, BitUtil.check(status, 0)); position.set(Position.PREFIX_OUT + 2, BitUtil.check(status, 1)); status = buf.readUnsignedByte(); position.set(Position.PREFIX_IN + 1, BitUtil.check(status, 4)); if (BitUtil.check(status, 0)) { position.set(Position.KEY_ALARM, Position.ALARM_SOS); } position.set(Position.KEY_RSSI, buf.readUnsignedByte()); position.set("gsmStatus", buf.readUnsignedByte()); position.set(Position.KEY_BATTERY, buf.readUnsignedShort()); position.set(Position.KEY_POWER, buf.readUnsignedShort()); position.set(Position.PREFIX_ADC + 1, buf.readUnsignedShort()); position.set(Position.PREFIX_ADC + 2, buf.readUnsignedShort()); } if (blockLength >= 15) { position.set(Position.PREFIX_TEMP + 1, buf.readUnsignedShort()); } buf.readerIndex(blockEnd); if (hardware == 0x10B) { decodeCards(position, buf); buf.skipBytes(buf.readUnsignedShort()); // temperature buf.skipBytes(buf.readUnsignedShort()); // lock decodePassengers(position, buf); } if (hardware == 0x406) { decodeTags(position, buf); } return position; } }