如何退出阻塞的 recv() 调用?

2021-12-11 00:00:00 sockets winapi network-programming c++ winsock

基于此问题，当您调用 closesocket() 在 recv() 已经使用的套接字上，然后 RST 数据包将被发送到另一端，而不是执行正常的断开连接 (4-方式握手).

Based on this question, when you call closesocket() on a socket that recv() is already using, then an RST packet will be sent to the other side instead of performing a graceful disconnection (4-way handshake).

但我希望执行一个优雅的断开连接，所以我需要在调用 closesocket() 之前退出 recv().

But I wish to perform a graceful disconnection, so I need to exit recv() before calling closesocket().

有没有办法做到这一点?

Is there a way to do that?

推荐答案

您可以shutdown() 用于输入的套接字.recv() 将解除阻塞并返回零，每个人都会很高兴.

You can shutdown() the socket for input. The recv() will unblock and return zero and everybody will be happy.

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