> does anyone know what exactly does the NIPQUAD() function do. i seen 
> it in a patch to get source and destination addresses of an ip packet.
> 
> where is it defined in the linux source?
There's a NIPQUAD in /usr/include/linux/kernel.h, or
/usr/src/linux/include/linux/kernel.h.

You might also want to look at man grep.

Steven Smith,
sos22@cam.ac.uk.