private static List CheckIp()

in toolkit/Toolkit/SqlManagedInstanceToolkit.cs [35:72]
32 lines of code
6 McCabe index (conditional complexity)

    private static List<string> CheckIp(string ipAddress, int port = 443)
    {
        List<string> result = new List<string>();

        // Check tcp connection to port
        //
        if (ipAddress != null)
        {
            try
            {
                Socket socket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);

                socket.Connect(ipAddress, port);

                if (socket.Connected)
                {
                    result.Add(string.Format("TCP connect to {0}:{1} was successful.", ipAddress, port));
                }
            }
            catch (SocketException se)
            {
                if (se.ErrorCode == 10061)
                {
                    result.Add(string.Format("TCP connect to {0}:{1} failed because there were no listener. However the port is open.", ipAddress, port));
                }
                else
                {
                    result.Add(string.Format("TCP connect to {0}:{1} failed with {2}.", ipAddress, port, se.Message));
                }
            }
            catch (Exception ex)
            {
                result.Add(string.Format("TCP connect to {0}:{1} failed with {2}.", ipAddress, port, ex.Message));
            }
        }

        return result;
    }