人为创建连接超时错误 [英] Artificially create a connection timeout error

问题描述

我在我们的软件中遇到了一个错误，当我收到连接超时时发生。这些错误是非常罕见的（通常当我的连接被我们的内部网络丢弃）。我如何人为地生成这种效果，所以我可以测试我们的软件？

I've had a bug in our software that occurs when I receive a connection timeout. These errors are very rare (usually when my connection gets dropped by our internal network). How can I generate this kind of effect artificially so I can test our software?

如果有问题，应用程序是使用CAsyncSocket类在C ++ / MFC中编写的。

If it matters the app is written in C++/MFC using CAsyncSocket classes.

我尝试使用不存在的主机，我收到套接字错误：

I've tried using a non-existant host, and I get the socket error:

WSAEINVAL（10022）参数无效

WSAEINVAL (10022) Invalid argument

我的下一次尝试是使用 Alexander 建议连接到不同的端口，例如81（在我自己的服务器上）。这工作很好。与丢弃的连接完全相同（60秒等待，然后错误）。谢谢！

My next attempt was to use Alexander's suggestion of connecting to a different port, e.g. 81 (on my own server though). That worked great. Exactly the same as a dropped connection (60 second wait, then error). Thank you!

推荐答案

连接到现有主机，但连接到被防火墙阻止的端口，只是丢弃TCP SYN数据包。例如，www.google.com:81。

Connect to an existing host but to a port that is blocked by the firewall that simply drops TCP SYN packets. For example, www.google.com:81.

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