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/*
* Copyright 2021 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.channel.Channel;
import org.traccar.BaseProtocolDecoder;
import org.traccar.DeviceSession;
import org.traccar.NetworkMessage;
import org.traccar.Protocol;
import org.traccar.helper.Checksum;
import java.net.SocketAddress;
public class R12wProtocolDecoder extends BaseProtocolDecoder {
public R12wProtocolDecoder(Protocol protocol) {
super(protocol);
}
private void sendResponse(Channel channel, String type, String id, String data) {
if (channel != null) {
String sentence = String.format("$HX,%s,%s,%s,#", type, id, data);
sentence += String.format(",%02x,\r\n", Checksum.xor(sentence));
channel.writeAndFlush(new NetworkMessage(sentence, channel.remoteAddress()));
}
}
@Override
protected Object decode(
Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
String sentence = (String) msg;
String[] values = sentence.split(",");
String type = values[1];
String id = values[2];
DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, id);
if (deviceSession == null) {
return null;
}
if (type.equals("0001")) {
sendResponse(channel, "1001", id, values[3] + ",OK");
}
return null;
}
}
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