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(mgp-users 00038) multicast mgp.

Ok, thought you might be interested... a student here has shown me
the first working prototype of a multicast-enabled version of mgp.

The master mgp transmits the internal representation of the slides
using RLC+RMDP (our congestion-controlled reliable multicast app)
whereas user commands (change page, hand-drawings etc) are sent using
multicast packets containing the master input related to the current
page.

And a demo copy if someone wants to try it, is at

	http://www.iet.unipi.it/~luigi/mgpm981104.tgz

it contains three FreeBSD 2.2.6 binaries:

	bin/mgpm			the main application
	bin/mgp_mcast_receiver		RLC/RMDP client
	bin/sen-sample			RLC/RMDP server

you need to install libttf.so.2.0 as well.

sources will come as soon as i can get hold of them.
Feedback welcome.

To launch it, start the master mgp with the additional option -M addr/port
and the receiver just as mgpm [options] -m addr/port and no file.
(addr/port should refer to a multicast address).

It's just a demo, the program probably has some bugs but just to get
the idea of how it works. Transfer speed using RLC+RMDP is also
voluntarily set to a low value for these tests.

Feedback welcome as usual.

	cheers
	luigi
-----------------------------+--------------------------------------
Luigi Rizzo                  |  Dip. di Ingegneria dell'Informazione
email: luigi@iet.unipi.it    |  Universita' di Pisa
tel: +39-50-568533           |  via Diotisalvi 2, 56126 PISA (Italy)
fax: +39-50-568522           |  http://www.iet.unipi.it/~luigi/
_____________________________|______________________________________