Autor: Miguel Masmano Tello <mmasmano@disca.upv.es>
Copyright (C) April, 2003 OCERA Consortium
Released under the terms of the GNU General Public License Version 2


This component provides a hard real-time IP/DUP stack implementation.


Description:
============
Currently, standard RTLinux/GPL has two different IP stacks:
RTSOCK and LwIP (LwIP was ported to RTLinux by a college from
UPVLC, in a project supported by the national
reseach department, MCYT).

Rtsock is not a device driver for network cards. Instead,
packets flow through the Linux kernel using the standard Linux
drivers, up/down the standard layer 2 and layer 3 protocols,
and then packets are diverted into an RTLinux task. Currently
only UDP sockets are supported.

LwIP is a complete and full featured TCP/IP stack designed to
be ported to embedded systems easily. The current version of
RTLinux provides support of a small number of network card
drivers.

This component is an implementation of
the UDP/IP stack from scratch (not derived from BSD
code as many other TCP/UDP/IP implementations). The main
design criteria is efficiency, while features and
compatibility are secondary. The stack will be prepared
(interfaced) to work with the network device drivers developed
in the project EtherBoot,
which has a large base of supported drivers; and also be
connected with the Linux networking stack (via a virtual
network driver), providing a high level communication
mechanism between RTLinux and Linux on the same machine.


Installation:
=============

First you need a clean copy of the RTLinux-GPL source code 
(3.2-pre2 version). Edit the Makefile and set the RTLINUX_PATH 
variable to the path of your rtlinux sources. Then, inside 
rtludp directory, type make.