programming in IPv4 and IPv6 settings in linux

[karozans]

Hi everyone. I am a noob to linux programming.

I am programming a small application in C.

I need to pass around all the IPv4 and Ipv6 settings to different functions.

Is there a structure out there in linux land that already exists for packing up IPv4 and IPv6 settings (address, netmask, gateway, etc)?

Or do I need to define my own structure?

thanks

[JohnGraham]

See this guide, particularly section 9.24 "struct sockaddr and pals". Also look up getaddrinfo() and inet_pton().