code: public void close ()
          throws IOException
      {
          if (_sock != null) {
              _sock.close();
  
              // clear out our references
              _sock = null;
              _in = null;
              _out = null;
          }
      }
docs: Closes the connection to the CDDB server previously opened with a call to {@link #connect}.
  If the connection was not previously established, this member function does nothing.