Sockets Ports

[bobbynad]

Hello

Please Let me know to connect the server using the free ports available at time from the client machine usings sockets.

 

[dynamic_sysop]

you would need to catch a " port already in use " error ( then maybe loop back to your connecting code to try a different port )
to test for an open / used port you could do something along these lines...

        Try
            Dim ip As System.Net.IPHostEntry = System.Net.Dns.GetHostByName(System.Net.Dns.GetHostName())
            Dim ipaddy As Net.IPAddress = ip.AddressList(0)
            Dim ep As New Net.IPEndPoint(ipaddy, 80)
            Dim listner As New Net.Sockets.TcpListener(ep)
            listner.Start()

        Catch ex As SocketException
            If ex.ErrorCode = 10048 Then /// error number for Port already in use.
                MessageBox.Show("The port you attempted to connect to is already in use!")
            Else
                MessageBox.Show(ex.ErrorCode & "   " & ex.Message)
            End If
        End Try