How do I output my host’s IP addresses from a C program?

Question

I need to display all the IP addresses from my local computer, using the C language. How can this be done?

Answer 1

Not a complete solution yet, but take a look in /proc/net!

• dev lists the available interface devices by name,
• route lists some routes, as does ipv6_route,
• arp lists devices in the actual routing table (does not include localhost).

Not as high-tech as the other solution, but it can be done with simple file reading. Linux specific, though.