public void Stop()
{
_isDriving = false;
HasStopped?.Invoke(this);
}
/// <summary>
/// Main loop of the SMTP server.
/// </summary>
internal void Run()
{
_stopped = false;
try
{
try
{
// Open a listener to accept client connection
TcpListener = new TcpListener(IPAddress.Any, Port);
TcpListener.Start();
}
catch (Exception e)
{
// If we can't start the listener, we don't start loop
_stopped = true;
// And store exception that will be thrown back to the thread
// that started the server
MainThreadException = e;
}
finally
{
// Inform calling thread that we can noew receive messages
// or that something bad happened.
StartedEvent.Set();
}
// Server: loop until stopped
while (!Stopped)
{
Socket socket = null;
try
{
// Accept an incomming client connection
socket = TcpListener.AcceptSocket();
}
catch
{
socket?.Close();
continue; // Non-blocking socket timeout occurred: try accept() again
}
// Get the input and output streams
NetworkStream networkStream = new NetworkStream(socket);
StreamReader input = new StreamReader(networkStream);
StreamWriter output = new StreamWriter(networkStream);
// Fetch all incomming messages from client, and add them to the queue
HandleSmtpTransaction(output, input);
// Close client connection, and wait for another one
socket.Close();
}
}
catch (Exception e)
{
// Send exception back to calling thread
if (!(e is SocketException socketException && !socketException.Message.Contains("WSACancelBlockingCall")))
{
MainThreadException = e;
}
}
finally
{
// The server won't listen anymore
_stopped = true;
// Stop the listener if it was started
if (TcpListener != null)
{
TcpListener.Stop();
TcpListener = null;
}
HasStopped?.Invoke(this, new EventArgs());
}
}
internal protected virtual void Stopped()
{
IsRunning = false;
HasStopped?.Invoke(this, EventArgs.Empty);
}