internal virtual async ValueTask <((long, long), string message)> ReceiveGoAwayFrameAsync()
{
byte frameType = _transceiver.Endpoint.Protocol == Protocol.Ice1 ?
(byte)Ice1Definitions.FrameType.CloseConnection : (byte)Ice2Definitions.FrameType.GoAway;
(ArraySegment <byte> data, bool fin) =
await ReceiveFrameAsync(frameType, CancellationToken.None).ConfigureAwait(false);
if (!fin)
{
throw new InvalidDataException($"expected end of stream after GoAway frame");
}
if (_transceiver.Endpoint.Communicator.TraceLevels.Protocol >= 1)
{
TraceFrame(data, frameType);
}
if (_transceiver.Endpoint.Protocol == Protocol.Ice1)
{
// LastResponseStreamId contains the stream ID of the last received response. We make sure to return
// this stream ID to ensure the request with this stream ID will complete successfully in case the
// close connection message is received shortly after the response and potentially processed before
// due to the thread scheduling.
return((_transceiver.LastResponseStreamId, 0), "connection gracefully closed by peer");
}
else
{
var istr = new InputStream(data, Ice2Definitions.Encoding);
return(((long)istr.ReadVarULong(), (long)istr.ReadVarULong()), istr.ReadString());
}
}
internal RetryPolicy(InputStream istr)
{
Retryable = istr.ReadRetryable();
Delay = Retryable == Retryable.AfterDelay ? TimeSpan.FromMilliseconds(istr.ReadVarULong()) : TimeSpan.Zero;
}