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/*
* Copyright 2016 - 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 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 RuptelaProtocolEncoder extends BaseProtocolEncoder {
public RuptelaProtocolEncoder(Protocol protocol) {
super(protocol);
}
public static ByteBuf encodeContent(int type, ByteBuf content) {
ByteBuf buf = Unpooled.buffer();
buf.writeShort(1 + content.readableBytes());
buf.writeByte(100 + type);
buf.writeBytes(content);
buf.writeShort(Checksum.crc16(Checksum.CRC16_KERMIT, buf.nioBuffer(2, buf.writerIndex() - 2)));
return buf;
}
@Override
protected Object encodeCommand(Command command) {
ByteBuf content = Unpooled.buffer();
switch (command.getType()) {
case Command.TYPE_CUSTOM:
String data = command.getString(Command.KEY_DATA);
if (data.matches("(\\p{XDigit}{2})+")) {
content.writeBytes(DataConverter.parseHex(data));
return content;
} else {
content.writeBytes(data.getBytes(StandardCharsets.US_ASCII));
return encodeContent(RuptelaProtocolDecoder.MSG_SMS_VIA_GPRS, content);
}
case Command.TYPE_REQUEST_PHOTO:
content.writeByte(1); // sub-command
content.writeByte(0); // source
content.writeInt(0); // start timestamp
content.writeInt(Integer.MAX_VALUE); // end timestamp
return encodeContent(RuptelaProtocolDecoder.MSG_FILES, content);
case Command.TYPE_CONFIGURATION:
content.writeBytes((command.getString(Command.KEY_DATA) + "\r\n").getBytes(StandardCharsets.US_ASCII));
return encodeContent(RuptelaProtocolDecoder.MSG_DEVICE_CONFIGURATION, content);
case Command.TYPE_GET_VERSION:
return encodeContent(RuptelaProtocolDecoder.MSG_DEVICE_VERSION, content);
case Command.TYPE_FIRMWARE_UPDATE:
content.writeBytes("|FU_STRT*\r\n".getBytes(StandardCharsets.US_ASCII));
return encodeContent(RuptelaProtocolDecoder.MSG_FIRMWARE_UPDATE, content);
case Command.TYPE_OUTPUT_CONTROL:
content.writeInt(command.getInteger(Command.KEY_INDEX));
content.writeInt(Integer.parseInt(command.getString(Command.KEY_DATA)));
return encodeContent(RuptelaProtocolDecoder.MSG_SET_IO, content);
case Command.TYPE_SET_CONNECTION:
String c = command.getString(Command.KEY_SERVER) + "," + command.getInteger(Command.KEY_PORT) + ",TCP";
content.writeBytes(c.getBytes(StandardCharsets.US_ASCII));
return encodeContent(RuptelaProtocolDecoder.MSG_SET_CONNECTION, content);
case Command.TYPE_SET_ODOMETER:
content.writeInt(Integer.parseInt(command.getString(Command.KEY_DATA)));
return encodeContent(RuptelaProtocolDecoder.MSG_SET_ODOMETER, content);
default:
return null;
}
}
}
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