不允許傳送或接收資料的要求，因為通訊端並未連線，而且 (在資料包通訊端使用 sendto 呼叫進行傳送時) 並未提供位址。

A request to send or receive data was disallowed because the socket is not connected and (when sending on a datagram socket using a sendto call) no address was supplied.