从套接字获取地址族.Linux [英] Get address family from socket. Linux

问题描述

我想为 Linux Socket API 编写一个 C++ 包装器.在 socket() ctor 中，请求地址族 (AF).我不想再次在 connect() 签名中要求 AF，因为它已经在套接字的构造函数中给出.那么如何从现有套接字中获取 AF?

I want to write a C++ wrapper for the Linux Socket API. In the socket() ctor the adress family (AF) is requested. I dont want to require the AF in the connect() signature again, becuase it has been already given in the constructor of socket. So how do I get the AF from an existing socket?

推荐答案

该死.找了半个小时左右.现在发布这个问题后，我立即找到了答案.

Damn. Searched about half an hour. Now after posting this question I found immiediately the answer.

getsockopt([...]) 带有选项 SO_DOMAIN(参见 socket 选项)

getsockopt([...]) with option SO_DOMAIN (see socket options)

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