近VS关机插座？ [英] close vs shutdown socket?

问题描述

在C，我的理解，如果我们关闭套接字，这意味着套接字将被破坏，以后可以重新使用。

In C, I understood that if we close a socket, it means the socket will be destroyed and can be re-used later.

如何关机？该说明称，关闭一个双向连接到插座的一半。但套接字被破坏，比如关闭系统调用？

How about shutdown? The description said it closes half of a duplex connection to that socket. But will that socket be destroyed like close system call?

推荐答案

这是解释在Beej的网络指南。 关机是阻止在单向或双向通信的灵活方式。当第二个参数是 SHUT_RDWR ，它会阻止发送和接收（如关闭）。然而，关闭是实际摧毁一个插座的方式。

This is explained in Beej's networking guide. shutdown is a flexible way to block communication in one or both directions. When the second parameter is SHUT_RDWR, it will block both sending and receiving (like close). However, close is the way to actually destroy a socket.

使用关机，你仍然能够接收挂起的数据同行已经发出（感谢乔伊·亚当斯指出这一点）。

With shutdown, you will still be able to receive pending data the peer already sent (thanks to Joey Adams for noting this).

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