关闭关机套接字？(close vs shutdown socket?)

关闭关机套接字？(close vs shutdown socket?)

在C中，我了解到，如果我们关闭一个套接字，这意味着套接字将被破坏，可以在以后重新使用。

关机怎么样？ 说明说它关闭了与该套接字的双工连接的一半。 但是这个套接字会像close系统调用一样被销毁吗？

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

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?

最满意答案

这在Beej的网络指南中有所解释 。 shutdown是在一个或两个方向阻止通信的灵活方式。 当第二个参数是SHUT_RDWR ，它将阻止发送和接收（如close ）。 但是， close是实际销毁套接字的方法。

shutdown ，您仍然可以收到对方已经发送的待处理数据（感谢Joey Adams注意到）。

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.

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