public byte[] Build(IRequest request)
{
var requestType = request.GetType();
var requestTypeAttribute = (RequestTypeAttribute)requestType.GetCustomAttribute(typeof(RequestTypeAttribute));
var requestBytes = new List <byte>();
const byte protocolVersion = 0x00;
requestBytes.Add(protocolVersion);
requestBytes.Add(requestTypeAttribute.RequestType0);
requestBytes.Add(requestTypeAttribute.RequestType1);
requestBytes.Add(requestTypeAttribute.RequestType2);
requestBytes.Add(requestTypeAttribute.RequestType3);
var dataBytes = new List <byte>();
foreach (var propertyInfo in requestType.GetAllProperties())
{
var value = propertyInfo.GetValue(request);
dataBytes.AddRange(_dataConverterDispatcher.Convert(value));
}
requestBytes.AddRange(BitConverter.GetBytes((ushort)dataBytes.Count));
requestBytes.AddRange(dataBytes);
var checksum = Crc16.ComputeChecksum(requestBytes);
requestBytes.Add(checksum[0]);
requestBytes.Add(checksum[1]);
return(requestBytes.ToArray());
}
public byte[] Build(IResponse response)
{
var responseType = response.GetType();
var responseBytes = new List <byte>();
const byte protocolVersion = 0x00;
responseBytes.Add(protocolVersion);
responseBytes.AddRange(GetResponseTypeBytes(responseType, response));
var dataBytes = new List <byte>();
foreach (var propertyInfo in responseType.GetAllProperties())
{
var value = propertyInfo.GetValue(response);
dataBytes.AddRange(_dataConverterDispatcher.Convert(value));
}
responseBytes.AddRange(BitConverter.GetBytes((ushort)dataBytes.Count));
responseBytes.AddRange(dataBytes);
var checksum = Crc16.ComputeChecksum(responseBytes);
responseBytes.Add(checksum[0]);
responseBytes.Add(checksum[1]);
return(responseBytes.ToArray());
}
public IResponse Parse(byte[] dataBytes)
{
if (dataBytes == null || dataBytes.Length < 13)
{
return(new CommonErrorResponse(CommonResponseCode.CorruptData, 0, 0, 0, 0, 0));
}
var requestType0 = dataBytes[1];
var requestType1 = dataBytes[2];
var requestType2 = dataBytes[3];
var requestType3 = dataBytes[4];
var counter = BitConverter.ToUInt16(dataBytes, 7);
var protocolVersion = dataBytes[0];
if (protocolVersion != 0x00)
{
return(new CommonErrorResponse(CommonResponseCode.NotSupportedProtocolVersion, counter, requestType0, requestType1, requestType2, requestType3));
}
if (!_responseTypes.TryGetValue(new RequestTypeAttribute(requestType0, requestType1, requestType2, requestType3), out var responseType))
{
return(new CommonErrorResponse(CommonResponseCode.UnknownCommand, counter, requestType0, requestType1, requestType2, requestType3));
}
var dataLength = BitConverter.ToUInt16(dataBytes, 5);
var crc0 = dataBytes[7 + dataLength];
var crc1 = dataBytes[8 + dataLength];
var computeChecksum = Crc16.ComputeChecksum(dataBytes.Take(dataBytes.Length - 2));
if (crc0 != computeChecksum[0] || crc1 != computeChecksum[1])
{
return(new CommonErrorResponse(CommonResponseCode.WrongCrc, counter, requestType0, requestType1, requestType2, requestType3));
}
var responseCode0 = dataBytes[9];
var responseCode1 = dataBytes[10];
if (responseCode0 != 0x00 || responseCode1 != 0x00)
{
return(new CommonErrorResponse(responseCode0, responseCode1, counter, requestType0, requestType1, requestType2, requestType3));
}
var response = Activator.CreateInstance(responseType);
var dataIndex = 7;
foreach (var propertyInfo in responseType.GetAllProperties())
{
object dataValue;
(dataValue, dataIndex) = _dataConverterDispatcher.ConvertBack(propertyInfo.PropertyType, dataBytes, dataIndex);
propertyInfo.SetValue(response, dataValue);
}
return((IResponse)response);
}
public IRequest Parse(byte[] dataBytes)
{
if (dataBytes == null || dataBytes.Length < 9)
{
throw new CorruptDataException();
}
var protocolVersion = dataBytes[0];
if (protocolVersion != 0x00)
{
throw new NotSupportedProtocolException(protocolVersion);
}
var requestType0 = dataBytes[1];
var requestType1 = dataBytes[2];
var requestType2 = dataBytes[3];
var requestType3 = dataBytes[4];
if (!_requestTypes.TryGetValue(new RequestTypeAttribute(requestType0, requestType1, requestType2, requestType3), out var requestType))
{
throw new UnknownCommandException();
}
var dataLength = BitConverter.ToUInt16(dataBytes, 5);
var crc0 = dataBytes[7 + dataLength];
var crc1 = dataBytes[8 + dataLength];
var computeChecksum = Crc16.ComputeChecksum(dataBytes.Take(dataBytes.Length - 2));
if (crc0 != computeChecksum[0] || crc1 != computeChecksum[1])
{
throw new WrongCrcException();
}
var request = Activator.CreateInstance(requestType);
var dataIndex = 7;
foreach (var propertyInfo in requestType.GetAllProperties())
{
object dataValue;
(dataValue, dataIndex) = _dataConverterDispatcher.ConvertBack(propertyInfo.PropertyType, dataBytes, dataIndex);
propertyInfo.SetValue(request, dataValue);
}
return((IRequest)request);
}
