C#: SMTP-server - time to get a team

[courtlanda]

Situation: My SVP server is connected to a client.EHLOfurther dialogueMAIL,RCPT,BDATlater, goodbyeQUIT) In time, the client (this) reconnects, I don't know why I don't give any team.I'm showing up. Client expectations of the team♪

Question:

What is the right thing to do in this case:

• Keep waiting for the client team?
• Cutting the connection with this client? or something?

Thank you.

Here's the customer data collection code (clinical teams):

 private string ReadLine()
        {
            try
            {
                while (true)
                {
                    if (clientSocket.Available > 0)
                    {
                         byte[] currByte = new byte[1];
                        int countRecieved = clientSocket.Receive(currByte, 1, SocketFlags.None);
                     ///.. код обработки команды и отправка ответа клиента

                }
                else
                {
                    l.Write("clientSocket.Available: " + clientSocket.Available.ToString());
                    //---- Time out stuff -----------------------//
                    if (DateTime.Now.Ticks > lastDataTime + ((long)(60000)) * 10000)
                    {
                        l.Write("ERROR: Read timeout: " + (((long)(60000)) * 10000).ToString());
                       // throw new Exception("Read timeout");
                       // return ""; // ???
                    }
                    System.Threading.Thread.Sleep(100);
                    //------------------------------------------//
                }
            }

        }
        catch (Exception x)
        {
            l.Write("EROR ReadLine(): " + x.ToString());
            throw new Exception( x.Message);
        }

[Alberto]

Well, IMOW, there's no clear correct answer to this question. Much depends on the context of the server.

I'd offer to break the connection if the silence didn't start the dialog in a certain time. Otherwise, DOS/DDOS could be attacked by your server by connecting a large number of silent clients to your server. And even if you have a lot of memory and all the objects of the active bonds you keep, you'll have enough of your silence to start a dialogue at the same time.