[PD-dev] multicast externals

[guenter geiger]

On Wed, 22 Jan 2003 bbogart at ryerson.ca wrote:
> Hey Guenter,
>
> I think that is a good idea. I have not looked at
> the source yet but integrating it would be
> complicated (at least beyond my current meager
> experience) Maybe I'll write one to figure it out
> and then see if I can integrate it into netsend
> proper. (may need help though!) here are the
> difference (from the user perspective):
>
> multicast traffic is not send to a machine, but a
> "group" or room, this is defined as an IP/port pair.
> so there needs to be at least those two arguments to
> send and receive.
>
> for receive your getting traffic from multiple
> hosts, so some facility to sort which host is which
> would be nice, I'm thinking a reference number
> prepended to each message for each host so you can
> use route to have different hosts effect different
> things. I think IPM (multicast protocol) has some ID
> stuff build in, but probably is the IP of the
> packet's source... sounds ugly in terms of routing
> but then you know who is sending what... Any ideas
> for a solution to that one?

Hmm, it would be nice not to change netreceives behaviour
too much.

If you can figure out  the IP, maybe you can use this
to lookup the hostname, or you use the ip directly.

Currently netsend/netreceive support 2 protocols, TCP and UDP.
You could add the multicast feature as a third protocol

netreceive 4000 0 --> TCP
netreceive 4000 1 --> UDP
netreceive 4000 2 --> Multicast

This way it is clear that the messages that come in have an additional
prefix, the IP(or hostname), which is to be routed or dropped.

I am not a specialist in that, so there might be better solutions.

Of course, if you think that you can not do it with netsend/receive,
you ahead and write a separate external.
Somehow I have the feeling that you can reuse so many things from
netsend, that you will end up reimplementing half of it.

Greetings,

Guenter

>
> I'll be starting more indepth research thursday,
> have to write me a little plain ol C version first!
>
> Ben
>
> ----- Original Message -----
> From: guenter geiger <geiger at xdv.org>
> Date: Wednesday, January 22, 2003 6:07 am
> Subject: Re: [PD-dev] multicast externals
>
> >
> > Hi Ben,
> >
> > Is there a way to include the feature in
> netsend/netreceive proper ?
> > If so, please consider it an option.
> > I am definitely against "yet another
> netsend/netreceive pair",that
> > does the same but slightly different ....
> >
> > Guenter
> >
> > On Tue, 21 Jan 2003 bbogart at ryerson.ca wrote:
> >
> > > Hello all,
> > >
> > > Well I'm actually going to start the development
> of a multicast
> > versions of netsend and netreceive. I also had a
> few ideas of other
> > multicast objects, like AcessGrid access objects
> etc. I wanted to
> > ask on the list who else is interested in
> developing such objects
> > (Pat Pagano, you interested in AG video and audio
> connection
> > objects for PD?) How should I structure this in
> CVS? Rather than a
> > seperate folder for eah of the externals perhaps a
> mbone folder
> > which includes mnetsent mnetreceive and then other
> objects to follow?
> > >
> > > Any other opinions on the matter?
> > >
> > > Thanks
> > > Ben
> > >
> > >
> > > _______________________________________________
> > > PD-dev mailing list
> > > PD-dev at iem.kug.ac.at
> > > http://iem.kug.ac.at/cgi-bin/mailman/listinfo/pd-dev
> > >
> >
> >
>