How to do reconnect socket when port closed or idled?

Hi Experts,
I am using winsock to work with Socket for MFC Window application.
I used port 8000 to connect to socket server,

Can you give some suggestion about how to do re-connect to server when server port 8000 is closed or idled for some reason?

Many thanks!

CongUanAsked:
Who is Participating?
I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

Deepu AbrahamR & D Engineering ManagerCommented:
You could use closesocket and try reconnecting.Also make sure that you have set tcp linger option (using setoption()) off while creating the socket.
Best Regards,
DeepuAbrahamK
0

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
Deepu AbrahamR & D Engineering ManagerCommented:
0
itsmeandnobodyelseCommented:
>>>> how to do re-connect to server when server port 8000 is closed or idled
I never heard of a "idled" port.

From my experience you must do nothing special. A  port or network device deactivated by an administrative action should be available again after it activated again. That may last a little time as TCP/IP is an asynchronously running subssystem.

The main problem maybe is that your prog needs to be able to handle such cases, i. e. instead of leaving a read or write operation in an undefined state it must identify the error returned a previous action as an error which might be temporary only and do periodically recalls, e. g. like that:

    int count = 0;
    while (true)
    {
           if (!readFromSocket())
           {
                 if (lastError == FATAL || ++count > MAX_RETRY)
                       exit(1);         // leave prog in case of a fatal error
                Sleep(1000);      // sleep a second
           }
    }

The lastError and readFromSocket used above are assumed to be members of an appropriate class.

Regards, Alex
0
SeanDurkinCommented:
No comment has been added to this question in more than 21 days, so it is now classified as abandoned.

I will leave the following recommendation for this question in the Cleanup Zone:
      Split: DeepuAbrahamK {http:#18822475} & itsmeandnobodyelse {http:#18836625}

Any objections should be posted here in the next 4 days. After that time, the question will be closed.

Sean
EE Cleanup Volunteer
0
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today
C++

From novice to tech pro — start learning today.