Re: socket bind always returns 0, why?

Tue, 27 May 2014 14:51:30 -0700 (PDT)
On Tuesday, May 27, 2014 5:27:58 PM UTC, wrote:

The following code returns 0 from the bind, even when netstat clearly shows that the port is taken by another process, ie the following function will always return true. Why?

bool isPortAvailable( int port )
            SOCKET candidateSocket;

            if(( candidateSocket = socket( AF_INET, SOCK_STREAM, 0 )) == -1 )


                return false;

            struct sockaddr_in serverAddress;
            memset (&serverAddress, 0, sizeof (serverAddress));

            serverAddress.sin_family = AF_INET;
            serverAddress.sin_addr.s_addr = htonl( INADDR_ANY );
            serverAddress.sin_port = htons( port );

            if( ::bind( candidateSocket, (struct sockaddr*)&serverAddress, sizeof( serverAddress )) != 0 )
                closesocket( candidateSocket );
                return false;

            closesocket( candidateSocket );

Why close it?

            return true;

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