How to use wired and wireless interfaces simultaneously?

Question

When creating any socket, we don't provide a device name (like eth0, or wlan0). On my laptop, I have a wired interface (eth) and a wireless interface (wlan). I want to run one process on each interface simultaneously.

Is it possible? I'm using Ubuntu 12.10.

Answer 1

When you create a socket, you can bind() it to a specific IP address. Whichever interface is associated with that address will be used.