libnet -- Routines to help with network packet contruction and handling<hr>
<a href="http://www.packetfactory.net/projects/libnet/">http://www.packetfactory.net/projects/libnet/</a><hr>
Libnet is a high-level API (toolkit) allowing the application programmer
to construct and inject network packets. It provides a portable and
simplified interface for low-level network packet shaping, handling
and injection.

Libnet hides much of the tedium of packet creation from the application
programmer such as multiplexing, buffer management, arcane packet header
information, byte-ordering, OS-dependent issues, and much more. Libnet
features portable packet creation interfaces at the IP layer and link
layer, as well as a host of supplementary and complementary functionality.

Using libnet, quick and simple packet assembly applications can be
whipped up with little effort. With a bit more time, more complex programs
can be written (Traceroute and ping were easily rewritten using libnet
and libpcap).
</listing>