The Packet Layer Protocol (PLP) is a way to route packets over X.25
connections in general and amateur radio AX.25 connections in
particular, essentially an alternative to NET/ROM.

A comprehensive listing of all the software for Linux amateur radio
users as well as information about how to configure an AX.25 port is
contained in the Linux Ham Wiki, available from
<http://www.linux-ax25.org>. You also might want to check out the
file Documentation/networking/ax25.txt. More information about
digital amateur radio in general is on the WWW at
<http://www.tapr.org/>.

To compile this driver as a module, choose M here: the
module will be called rose.

source code:

net/rose/