public async Task ApplyStreamFilterAsync(Func <Stream, Task <Stream> > filter)
{
await ConnectionChannel.ApplyStreamFilterAsync(filter);
}
public async Task ProcessAsync()
{
try
{
Server.Behaviour.OnSessionStarted(this, Session);
SetReaderEncoding(Server.Behaviour.GetDefaultEncoding(this));
if (Server.Behaviour.IsSSLEnabled(this))
{
await ConnectionChannel.ApplyStreamFilterAsync(async s =>
{
SslStream sslStream = new SslStream(s);
await sslStream.AuthenticateAsServerAsync(Server.Behaviour.GetSSLCertificate(this));
return(sslStream);
});
Session.SecureConnection = true;
}
await WriteResponseAsync(new SmtpResponse(StandardSmtpResponseCode.ServiceReady,
Server.Behaviour.DomainName + " smtp4dev ready"));
int numberOfInvalidCommands = 0;
while (ConnectionChannel.IsConnected)
{
bool badCommand = false;
SmtpCommand command = new SmtpCommand(await ReadLineAsync());
Server.Behaviour.OnCommandReceived(this, command);
if (command.IsValid)
{
IVerb verbProcessor = VerbMap.GetVerbProcessor(command.Verb);
if (verbProcessor != null)
{
try
{
await verbProcessor.ProcessAsync(this, command);
}
catch (SmtpServerException exception)
{
await WriteResponseAsync(exception.SmtpResponse);
}
}
else
{
badCommand = true;
}
}
else if (command.IsEmpty)
{
}
else
{
badCommand = true;
}
if (badCommand)
{
numberOfInvalidCommands++;
if (Server.Behaviour.MaximumNumberOfSequentialBadCommands > 0 &&
numberOfInvalidCommands >= Server.Behaviour.MaximumNumberOfSequentialBadCommands)
{
await WriteResponseAsync(new SmtpResponse(StandardSmtpResponseCode.ClosingTransmissionChannel, "Too many bad commands. Bye!"));
await CloseConnectionAsync();
}
else
{
await WriteResponseAsync(new SmtpResponse(StandardSmtpResponseCode.SyntaxErrorCommandUnrecognised,
"Command unrecognised"));
}
}
}
}
catch (IOException ioException)
{
Session.SessionError = ioException;
Session.SessionErrorType = SessionErrorType.NetworkError;
}
catch (Exception exception)
{
Session.SessionError = exception;
Session.SessionErrorType = SessionErrorType.UnexpectedException;
}
await CloseConnectionAsync();
Session.EndDate = DateTime.Now;
Server.Behaviour.OnSessionCompleted(this, Session);
}
