libcidr-dev - 1.2.3-3+b2 main

libcidr is a C library implementing a variety of functions to
manipulate IP addresses and netblocks. It handles both IPv4 and IPv6
networks, will transform them to and from text strings in a variety of
formats, cram them into and lever them out of in_addr and in6_addr
structures, and give you all sorts of stats about them.
Functions are provided also to tell you a few things about the network
any given CIDR block is in, what its parent and child networks are, and
so on. If you're really nice, may even cook you breakfast.
.
This package contains include files and development documentation.