How do you know which interface a broadcast message came from?

Question

I have a rather odd situation where I will have multiple interfaces connected to the same network. When I receive a broadcast or multicast message, I would like to know what interface it came from. It there a way to do that in C or ideally Python?

Thanks!

Answer 1

最明显的方法是将多个套接字绑定，每个套接字仅绑定到一个接口 -不要监听0.0.0.0 。