protected override async Task <IModbusResponse> ReadResponseAsync <TResponse>(CancellationToken token = default)
{
var buffer = await PipeResource.ReadAsync(token).ConfigureAwait(false);
while (buffer.Length < MbapHeaderSizeOnResponse)
{
PipeResource.AdvanceTo(buffer.Start);
buffer = await PipeResource.ReadAsync(token).ConfigureAwait(false);
}
var frameLength = (ushort)IPAddress.HostToNetworkOrder(NetCoreBitConverter.ToInt16(buffer.Slice(4, 2).ToSpan()));
while (buffer.Length < MbapHeaderSizeOnResponse + frameLength)
{
PipeResource.AdvanceTo(buffer.Start);
buffer = await PipeResource.ReadAsync(token).ConfigureAwait(false);
}
var processedSequence = buffer.Slice(0, MbapHeaderSizeOnResponse + frameLength);
var response = ModbusResponseFactory.CreateResponse <TResponse>(
processedSequence.Slice(MbapHeaderSizeOnResponse, processedSequence.Length - MbapHeaderSizeOnResponse).ToSpan());
response.TransactionId = (ushort)IPAddress.NetworkToHostOrder(NetCoreBitConverter.ToInt16(buffer.Slice(0, 2).ToSpan()));
PipeResource.AdvanceTo(processedSequence.End);
return(response);
}
public void NetCoreBitConverterToInt16ThrowsOnInvalidSpanSize()
{
// Arrange
var array = new byte[1];
// Act/Assert
Assert.Throws <ArgumentOutOfRangeException>("value", () => NetCoreBitConverter.ToInt16(array));
}
public override void Initialize(ReadOnlySpan <byte> frame)
{
base.Initialize(frame);
StartAddress = (ushort)IPAddress.NetworkToHostOrder(NetCoreBitConverter.ToInt16(frame.Slice(2, 2)));
}