如何动态地将套接字绑定到只有一个网络接口？

问题描述

目前我做以下侦听所有接口的任何可用的端口：

Currently I do the following to listen on any available port on all interfaces:

// hints struct for the getaddrinfo call
struct addrinfo hints, *res;
memset(&hints, 0, sizeof hints);
hints.ai_family = AF_INET;
hints.ai_socktype = SOCK_STREAM;
hints.ai_flags = AI_PASSIVE;

// Fill in addrinfo with getaddrinfo
if (getaddrinfo(NULL, "0", &hints, &res) != 0) {
	cerr << "Couldn't getaddrinfo." << endl;
	exit(-1);
}

我想动态绑定到只有一个接口，该系统的非环回接口

I would like to dynamically bind to only one interface, the non-loopback interface of the system.

我怎么会去这样做？

推荐答案

看看SO_BINDTODEVICE。 Tuxology有

Take a look at SO_BINDTODEVICE. Tuxology has a good description of this

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