C++ Winsock API 如何在接受连接之前获取连接的客户端 IP? [英] C++ Winsock API how to get connecting client IP before accepting the connection?

问题描述

我正在使用 Winsock API(而不是 CAsyncSocket)来创建一个侦听传入连接的套接字.

I am using the Winsock API (not CAsyncSocket) to make a socket that listens for incoming connections.

当有人尝试连接时，我如何才能在接受连接之前获取他们的 IP 地址?我试图让它只接受来自某些 IP 地址的连接.

When somebody tries to connect, how can I get their IP address BEFORE accepting the connection? I am trying to make it only accept connections from certain IP addresses.

谢谢

推荐答案

SO_CONDITIONAL_ACCEPT 套接字选项.这里

SO_CONDITIONAL_ACCEPT socket option. Here

此外，很确定它可用于 XP 和 Server 2003，而不仅仅是 Vista.

Also, pretty sure it's available in XP and Server 2003, not just Vista.

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