如何创建到特定网络接口的传出套接字? [英] How do I make an outgoing socket to a SPECIFIC network interface?

问题描述

我的服务器有两个不同的网络接口，每个接口都有不同的 IP 地址.我怎样才能创建一个套接字，让它从特定的 IP 地址出去?

I have a server with two different network interfaces, each with a different IP address. How can I create a socket so it'll go out a specific IP address?

我更喜欢 Python 的例子，但问题是语言不可知的，所以请远离.

I'd prefer a python example, but the question is language agnostic, so shoot away.

请不要给我你不能"作为答案.我的意思是，它是一台电脑.例如，我可以做任何我喜欢的事情——我可以通过编程方式禁用一个我不想要的界面.我正在寻找更漂亮的东西.

Please don't give me "You can't" as an answer. I mean, it is a computer. I can do anything I like to it, for example - I can programatically disable the one interface I don't want on the fly. I'm looking for something prettier.

推荐答案

您当然可以将套接字绑定到特定设备.

You can certainly bind a socket to a specific device.

我不知道如何在 python 中执行此操作，但是使用 berkeley socket api(在 C 中)您需要调用 setsockopt()，使用选项 SO_BINDTODEVICE>.

I don't know how to do it in python, but using the berkeley socket api (in C) you need to call setsockopt(), using the option SO_BINDTODEVICE.

您传入一个接口描述符，其类型为 struct ifreq.理想情况下，您可以使用 ioctl() 获取接口描述符的内容，并请求 SIOCGIFINDEX - 将接口名称(例如 eth0)作为参数传递.

You pass in an interface descriptor, which is of type struct ifreq. Ideally you would get the contents of the interface descriptor by using ioctl(), and requesting SIOCGIFINDEX - passing the name of the interface (eg. eth0) as an argument.

刚刚快速搜索并找到this 中套接字方法的文档Python.setsockopt() 就是其中之一.

edit: Just did a quick search and found this documentation of the socket methods in python. setsockopt() is amongst them.

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