private async void StartReading()
{
try
{
while (true)
{
var result = await _lowerConnection.Input.ReadAsync();
var buffer = result.Buffer;
if (result.IsCompleted && buffer.IsEmpty)
{
return;
}
try
{
while (RecordProcessor.TryGetFrame(ref buffer, out ReadableBuffer messageBuffer))
{
var recordType = RecordProcessor.ReadRecord(ref messageBuffer, _state);
_logger?.LogTrace($"Received TLS frame {recordType}");
if (recordType == RecordType.Handshake)
{
var writer = _handshakePipe.Writer.Alloc();
writer.Append(messageBuffer);
await writer.FlushAsync();
await HandshakeReading();
if (_state.State == StateType.HandshakeComplete && !_startedApplicationWrite)
{
_logger?.LogInformation("Handshake complete starting application writing");
_startedApplicationWrite = true;
ApplicationWriting();
_handshakeDone.SetResult(true);
}
continue;
}
if (recordType == RecordType.Alert)
{
_state.HandleAlertMessage(messageBuffer);
continue;
}
if (recordType == RecordType.Application)
{
_logger?.LogTrace("Writing Application Data");
var writer = _outputPipe.Writer.Alloc();
writer.Append(messageBuffer);
await writer.FlushAsync();
continue;
}
if (recordType == RecordType.ChangeCipherSpec)
{
_state.HandleChangeCipherSpec(messageBuffer);
continue;
}
Alerts.AlertException.ThrowAlert(Alerts.AlertLevel.Fatal, Alerts.AlertDescription.unexpected_message, $"Unknown message type {recordType}");
}
if (result.IsCompleted)
{
return;
}
}
finally
{
_lowerConnection.Input.Advance(buffer.Start, buffer.End);
}
}
}
catch (Exception ex)
{
_logger?.LogWarning(new EventId(1), ex, "There was an unhandled exception in the reading loop");
}
finally
{
Dispose();
}
}
