shutdown SD_SEND后recv的问题

发送方, 数据发送完毕后, 执行了 shutdown(s, SD_SEND);
为何 接收方 的recv还被阻塞着, 不返回0么?

那这 shutdown(s, SD_SEND); 起啥作用了

The shutdown function is used on all types of sockets to disable reception, transmission, or both.
If the how parameter is SD_SEND, subsequent calls to the send function are disallowed. For TCP sockets, a FIN will be sent after all data is sent and acknowledged by the receiver.

shutdown不是closesocket

表示不再发送数据了