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The following archive was created by hippie-mail 7.98617-22 on Sat Apr 10 1999 - 01:10:59
Ray Arachelian (sunder@brainlink.com)
Wed, 19 Aug 1998 16:04:15 -0400
Mok-Kong Shen wrote:
>
> Perry E. Metzger wrote:
>
> > Remember, UDP is unreliable, so you have to build a reliable structure
> > on top of it. By the time you are done, what you have usually ends up
> > looking like TCP anyway, only less well designed and implemented.
>
> Simply a question from an ignorant: Can TCP do a braodcast?
Yes, but that wouldn't work for a chat program unless all of your clients
live on the same tcp network. What you want is to use multicasts. i.e.
Class D networks. (224.0.0.1-239.255.255.254) but you run into routers that
don't support multicasting and then you're fucked.
What you need is an efficient server to act as an exploder. A decent structure
is what IRC uses - spanning tree - to connect several servers together. Then
again I seem to recall the rest of this thread was talking about moving towards
a server free chat network... not an easy thing, but if each client is a server
too it can be done.. the problem is if every client is a server too, then all
the clients need to know of each others' presence (not fully) otherwise the
client you're connected to could drop off the net and disconnect. And heck,
you could be behind a T3 but your connection could be some dude running off a
9600bps PPP connection, so efficiency is out...
There's also issues with moderation and such - but those could be handled by
crypto signatures...
I suppose doing a DC Net or Onion Ring chat server core would be a lot more
efficient and secure than a serverless chat network...
--=====================================Kaos=Keraunos=Kybernetos============== .+.^.+.| Ray Arachelian |Prying open my 3rd eye. So good to see |./|\. ..\|/..|sunder@sundernet.com|you once again. I thought you were |/\|/\ <--*-->| ------------------ |hiding, and you thought that I had run |\/|\/ ../|\..| "A toast to Odin, |away chasing the tail of dogma. I opened|.\|/. .+.v.+.|God of screwdrivers"|my eye and there we were.... |..... ======================= http://www.sundernet.com ==========================
The following archive was created by hippie-mail 7.98617-22 on Sat Apr 10 1999 - 01:10:59