MFC Sockets and "Address already in Use" problem...
Posted on 2002-05-26
I have a simple server program using MFC sockets to receive requests from client applications on TCP/IP and respond with some data. The application basically creates a socket, binds it to a IP address and starts listening on a specific port. I have a problem here.
Randomly the application exits with an error message "Address already in use" indicating the port number being used for listening is already in use. But I have used different port numbers which I am sure are not used elsewhere and I still get this error. Unfortunately the occurance is random. Sometimes the problem does not get solved even after restarting the computer.
I have a feeling that when the earlier instance of this socket program exits it might not be doing a graceful shutdown and hence traces of the connection made by it are still remaining causing the next instance to fail. To be on the safer side I would like to do a "scoket deinitialisation" first and then start the application so that any old traces are removed. Can someone suggest how one could do a socket deinitialisation so that the program that starts is fail proof?