async Task ListenAsync(SmtpSessionContext sessionContext, IEndpointListener endpointListener, CancellationToken cancellationToken)
{
// The listener can be stopped either by the caller cancelling the CancellationToken used when starting the server, or when calling
// the shutdown method. The Shutdown method will stop the listeners and allow any active sessions to finish gracefully.
var cancellationTokenSource = CancellationTokenSource.CreateLinkedTokenSource(_shutdownTokenSource.Token, cancellationToken);
// wait for a client connection
var stream = await endpointListener.GetStreamAsync(sessionContext, cancellationTokenSource.Token).ConfigureAwait(false);
cancellationTokenSource.Token.ThrowIfCancellationRequested();
sessionContext.NetworkClient = new NetworkClient(stream, _options.NetworkBufferSize);
if (sessionContext.EndpointDefinition.IsSecure && _options.ServerCertificate != null)
{
await sessionContext.NetworkClient.Stream.UpgradeAsync(_options.ServerCertificate, _options.SupportedSslProtocols, cancellationToken).ConfigureAwait(false);
cancellationToken.ThrowIfCancellationRequested();
}
_sessions.Run(sessionContext, cancellationToken);
}
async Task <ISecurableDuplexPipe> GetPipeAsync(IEndpointListener endpointListener, SmtpSessionContext sessionContext, CancellationToken cancellationToken)
{
var pipe = await endpointListener.GetPipeAsync(sessionContext, cancellationToken).ConfigureAwait(false);
try
{
cancellationToken.ThrowIfCancellationRequested();
if (sessionContext.EndpointDefinition.IsSecure && _options.ServerCertificate != null)
{
await pipe.UpgradeAsync(_options.ServerCertificate, _options.SupportedSslProtocols, cancellationToken).ConfigureAwait(false);
cancellationToken.ThrowIfCancellationRequested();
}
}
catch
{
pipe.Dispose();
throw;
}
return(pipe);
}
public CustomEndpointListener(IEndpointListener endpointListener)
{
_endpointListener = endpointListener;
}
