Java tutorial
/* * Copyright 2013 - 2019 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.DeviceSession; import org.traccar.NetworkMessage; import org.traccar.Protocol; import org.traccar.helper.DataConverter; import org.traccar.helper.UnitsConverter; import org.traccar.model.Position; import java.net.SocketAddress; import java.nio.charset.StandardCharsets; import java.util.Date; import java.util.LinkedList; import java.util.List; public class RuptelaProtocolDecoder extends BaseProtocolDecoder { public RuptelaProtocolDecoder(Protocol protocol) { super(protocol); } public static final int MSG_RECORDS = 1; public static final int MSG_DEVICE_CONFIGURATION = 2; public static final int MSG_DEVICE_VERSION = 3; public static final int MSG_FIRMWARE_UPDATE = 4; public static final int MSG_SET_CONNECTION = 5; public static final int MSG_SET_ODOMETER = 6; public static final int MSG_SMS_VIA_GPRS_RESPONSE = 7; public static final int MSG_SMS_VIA_GPRS = 8; public static final int MSG_DTCS = 9; public static final int MSG_SET_IO = 17; public static final int MSG_FILES = 37; public static final int MSG_EXTENDED_RECORDS = 68; private Position decodeCommandResponse(DeviceSession deviceSession, int type, ByteBuf buf) { Position position = new Position(getProtocolName()); position.setDeviceId(deviceSession.getDeviceId()); getLastLocation(position, null); position.set(Position.KEY_TYPE, type); switch (type) { case MSG_DEVICE_CONFIGURATION: case MSG_DEVICE_VERSION: case MSG_FIRMWARE_UPDATE: case MSG_SMS_VIA_GPRS_RESPONSE: position.set(Position.KEY_RESULT, buf.toString(buf.readerIndex(), buf.readableBytes() - 2, StandardCharsets.US_ASCII).trim()); return position; case MSG_SET_IO: position.set(Position.KEY_RESULT, String.valueOf(buf.readUnsignedByte())); return position; default: return null; } } private long readValue(ByteBuf buf, int length, boolean signed) { switch (length) { case 1: return signed ? buf.readByte() : buf.readUnsignedByte(); case 2: return signed ? buf.readShort() : buf.readUnsignedShort(); case 4: return signed ? buf.readInt() : buf.readUnsignedInt(); default: return buf.readLong(); } } private void decodeParameter(Position position, int id, ByteBuf buf, int length) { switch (id) { case 2: case 3: case 4: position.set("di" + (id - 1), readValue(buf, length, false)); break; case 5: position.set(Position.KEY_IGNITION, readValue(buf, length, false) == 1); break; case 74: position.set(Position.PREFIX_TEMP + 3, readValue(buf, length, true) * 0.1); break; case 78: case 79: case 80: position.set(Position.PREFIX_TEMP + (id - 78), readValue(buf, length, true) * 0.1); break; default: position.set(Position.PREFIX_IO + id, readValue(buf, length, false)); break; } } @Override protected Object decode(Channel channel, SocketAddress remoteAddress, Object msg) throws Exception { ByteBuf buf = (ByteBuf) msg; buf.readUnsignedShort(); // data length String imei = String.format("%015d", buf.readLong()); DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, imei); if (deviceSession == null) { return null; } int type = buf.readUnsignedByte(); if (type == MSG_RECORDS || type == MSG_EXTENDED_RECORDS) { List<Position> positions = new LinkedList<>(); buf.readUnsignedByte(); // records left int count = buf.readUnsignedByte(); for (int i = 0; i < count; i++) { Position position = new Position(getProtocolName()); position.setDeviceId(deviceSession.getDeviceId()); position.setTime(new Date(buf.readUnsignedInt() * 1000)); buf.readUnsignedByte(); // timestamp extension if (type == MSG_EXTENDED_RECORDS) { buf.readUnsignedByte(); // record extension } buf.readUnsignedByte(); // priority (reserved) position.setValid(true); position.setLongitude(buf.readInt() / 10000000.0); position.setLatitude(buf.readInt() / 10000000.0); position.setAltitude(buf.readUnsignedShort() / 10.0); position.setCourse(buf.readUnsignedShort() / 100.0); position.set(Position.KEY_SATELLITES, buf.readUnsignedByte()); position.setSpeed(UnitsConverter.knotsFromKph(buf.readUnsignedShort())); position.set(Position.KEY_HDOP, buf.readUnsignedByte() / 10.0); if (type == MSG_EXTENDED_RECORDS) { position.set(Position.KEY_EVENT, buf.readUnsignedShort()); } else { position.set(Position.KEY_EVENT, buf.readUnsignedByte()); } // Read 1 byte data int cnt = buf.readUnsignedByte(); for (int j = 0; j < cnt; j++) { int id = type == MSG_EXTENDED_RECORDS ? buf.readUnsignedShort() : buf.readUnsignedByte(); decodeParameter(position, id, buf, 1); } // Read 2 byte data cnt = buf.readUnsignedByte(); for (int j = 0; j < cnt; j++) { int id = type == MSG_EXTENDED_RECORDS ? buf.readUnsignedShort() : buf.readUnsignedByte(); decodeParameter(position, id, buf, 2); } // Read 4 byte data cnt = buf.readUnsignedByte(); for (int j = 0; j < cnt; j++) { int id = type == MSG_EXTENDED_RECORDS ? buf.readUnsignedShort() : buf.readUnsignedByte(); decodeParameter(position, id, buf, 4); } // Read 8 byte data cnt = buf.readUnsignedByte(); for (int j = 0; j < cnt; j++) { int id = type == MSG_EXTENDED_RECORDS ? buf.readUnsignedShort() : buf.readUnsignedByte(); decodeParameter(position, id, buf, 8); } Long driverIdPart1 = (Long) position.getAttributes().remove(Position.PREFIX_IO + 126); Long driverIdPart2 = (Long) position.getAttributes().remove(Position.PREFIX_IO + 127); if (driverIdPart1 != null && driverIdPart2 != null) { ByteBuf driverId = Unpooled.copyLong(driverIdPart1, driverIdPart2); position.set(Position.KEY_DRIVER_UNIQUE_ID, driverId.toString(StandardCharsets.US_ASCII)); driverId.release(); } positions.add(position); } if (channel != null) { channel.writeAndFlush(new NetworkMessage( Unpooled.wrappedBuffer(DataConverter.parseHex("0002640113bc")), remoteAddress)); } return positions; } else if (type == MSG_DTCS) { 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()); buf.readUnsignedByte(); // reserved position.setTime(new Date(buf.readUnsignedInt() * 1000)); position.setValid(true); position.setLongitude(buf.readInt() / 10000000.0); position.setLatitude(buf.readInt() / 10000000.0); if (buf.readUnsignedByte() == 2) { position.set(Position.KEY_ARCHIVE, true); } position.set(Position.KEY_DTCS, buf.readSlice(5).toString(StandardCharsets.US_ASCII)); positions.add(position); } if (channel != null) { channel.writeAndFlush(new NetworkMessage( Unpooled.wrappedBuffer(DataConverter.parseHex("00026d01c4a4")), remoteAddress)); } return positions; } else { return decodeCommandResponse(deviceSession, type, buf); } } }