/// <summary>
/// Listen for SMTP traffic on the given endpoint.
/// </summary>
/// <param name="endpointDefinition">The definition of the endpoint to listen on.</param>
/// <param name="cancellationToken">The cancellation token.</param>
/// <returns>A task which performs the operation.</returns>
async Task ListenAsync(IEndpointDefinition endpointDefinition, 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);
using var endpointListener = _endpointListenerFactory.CreateListener(endpointDefinition);
while (cancellationTokenSource.Token.IsCancellationRequested == false)
{
var sessionContext = new SmtpSessionContext(_serviceProvider, _options, endpointDefinition);
try
{
// wait for a client connection
sessionContext.Pipe = await endpointListener.GetPipeAsync(sessionContext, cancellationTokenSource.Token).ConfigureAwait(false);
cancellationTokenSource.Token.ThrowIfCancellationRequested();
if (sessionContext.EndpointDefinition.IsSecure && _options.ServerCertificate != null)
{
await sessionContext.Pipe.UpgradeAsync(_options.ServerCertificate, _options.SupportedSslProtocols, cancellationToken).ConfigureAwait(false);
cancellationToken.ThrowIfCancellationRequested();
}
_sessions.Run(sessionContext, cancellationTokenSource.Token);
}
catch (OperationCanceledException) { }
}
}
/// <summary>
/// Listen for SMTP traffic on the given endpoint.
/// </summary>
/// <param name="endpointDefinition">The definition of the endpoint to listen on.</param>
/// <param name="cancellationToken">The cancellation token.</param>
/// <returns>A task which performs the operation.</returns>
async Task ListenAsync(IEndpointDefinition endpointDefinition, 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);
using var endpointListener = _endpointListenerFactory.CreateListener(endpointDefinition);
while (cancellationTokenSource.Token.IsCancellationRequested == false)
{
var sessionContext = new SmtpSessionContext(_serviceProvider, _options, endpointDefinition);
try
{
// wait for a client connection
sessionContext.Pipe = await GetPipeAsync(endpointListener, sessionContext, cancellationTokenSource.Token).ConfigureAwait(false);
}
catch (OperationCanceledException) { }
catch (Exception ex)
{
OnSessionFaulted(new SessionFaultedEventArgs(sessionContext, ex));
continue;
}
_sessions.Run(sessionContext, cancellationTokenSource.Token);
}
}
