如何检查 Boost.Asio 中的套接字是否关闭?

How to check if socket is closed in Boost.Asio?(如何检查 Boost.Asio 中的套接字是否关闭?)

问题描述

检查连接远程端的套接字是否关闭的最简单方法是什么?socket::is_open() 即使在远程端关闭也会返回 true(我使用的是 boost::asio::ip::tcp::socket).

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并查看它是否成功，但是我必须更改程序的逻辑以使其以这种方式工作(我不希望此时从流中提取数据支票).

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

如果连接已被对等端彻底关闭，您应该在阅读时得到一个 EOF.否则我通常会 ping 以确定连接是否真的有效.

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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