如何检查是否套接字在Boost.Asio的关闭？ [英] How to check if socket is closed in Boost.Asio?

问题描述

什么是检查一个套接字上连接的远程端关闭了最简单的方法？ 插座:: IS_OPEN（）即使是在远程端关闭返回true（我使用的boost ::支持ASIO ::知识产权:: TCP ::插座）。

What is the easiest way to check if a socket was closed on the remote side of the connection? socket::is_open() returns true even if it is closed on the remote side (I'm using boost::asio::ip::tcp::socket).

我可以尝试从流中读取，看看它是否成功，但我不得不改变我的程序逻辑，使其工作这样（我不希望从流点处提取的数据做检查的）。

I could try to read from the stream and see if it succeeds, but I'd have to change the logic of my program to make it work this way (I do not want data to be extracted from the stream at the point of the check).

推荐答案

如果连接对端是完全关闭，而读，你应该得到一个EOF。否则，我一般平，以找出连接是否真的还活着。

If the connection has been cleanly closed by the peer you should get an EOF while reading. Otherwise I generally ping in order to figure out if the connection is really alive.

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