/* * Copyright 2022 Stefan Clark (stefan@stefanclark.co.uk) * * 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 org.traccar.BaseProtocolEncoder; import org.traccar.helper.Checksum; import org.traccar.helper.DataConverter; import org.traccar.model.Command; import org.traccar.Protocol; import java.nio.charset.StandardCharsets; public class Xexun2ProtocolEncoder extends BaseProtocolEncoder { public Xexun2ProtocolEncoder(Protocol protocol) { super(protocol); } private static ByteBuf encodeContent(String uniqueId, String content) { ByteBuf buf = Unpooled.buffer(); ByteBuf message = Unpooled.copiedBuffer(content.getBytes(StandardCharsets.US_ASCII)); buf.writeShort(Xexun2ProtocolDecoder.FLAG); buf.writeShort(Xexun2ProtocolDecoder.MSG_COMMAND); buf.writeShort(1); // index buf.writeBytes(DataConverter.parseHex(uniqueId + "0")); buf.writeShort(message.readableBytes()); buf.writeShort(Checksum.ip(message.nioBuffer())); buf.writeBytes(message); buf.writeShort(Xexun2ProtocolDecoder.FLAG); return buf; } @Override protected Object encodeCommand(Command command) { String uniqueId = getUniqueId(command.getDeviceId()); switch (command.getType()) { case Command.TYPE_CUSTOM: return encodeContent(uniqueId, command.getString(Command.KEY_DATA)); case Command.TYPE_POSITION_PERIODIC: return encodeContent(uniqueId, String.format("tracking_send=%1$d,%1$d", command.getInteger(Command.KEY_FREQUENCY))); case Command.TYPE_POWER_OFF: return encodeContent(uniqueId, "of=1"); case Command.TYPE_REBOOT_DEVICE: return encodeContent(uniqueId, "reset"); default: return null; } } }