lwIP is a
light-weight IP stack. It provides both UDP and TCP implementations,
however for this project we will only be using UDP. You do not
need to call this library directly apart from the initial setup,
for which we have provided sample code in the network.c
file.
If you are feeling adventurous and want to use the stack directly
you, can look at the code in libnfs
and the lwIP header
files.