libdnet provides a simplified, portable interface to several low-level
networking routines, including:

* network address manipulation

* kernel arp(4) cache and route(4) table lookup and manipulation

* network firewalling (IP filter, ipfw, ipchains, pf, PktFilter,
...)

* network interface lookup and manipulation

* IP tunnelling (BSD/Linux tun, Universal TUN/TAP device)

* raw IP packet and Ethernet frame transmission