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[REBOL] I think I've figured out IGMP...

From: pwoodward::cncdsl::com at: 23-Aug-2001 0:06

OK - after some experimentation I think I've figured out how to handle multicasting in REBOL. -=First instance of REBOL=- 1> Open a UDP "listener": udp: open udp://:9999 ; from the docs 2> Use set-modes to "join" a multicast group: set-modes udp [multicast-groups: [[]]] 3> Wait for incoming data... print copy udp -=Second instance of REBOL=- Now - you probably want to send the listener some data... 1> Open a UDP "sender": udp: open udp:// 2> Send some data... insert udp "test" At this point, you should see the "test" appear in the first instance of REBOL. Now - what's really pretty cool about this is that if you have REBOL running on one or more systems - you can setup 2 or more listeners as described in the first portion - and data sent by the "sender" in the second part should reach _all_ of them w/o you having to explicitly address each of them!!! Of course, this isn't exactly new - it's how streaming media multicasts have worked for the last couple of years, along with Microsoft's own WINS... But - hey REBOL makes it pretty easy. And here I thought I'd have a major struggle on my hands. Now to see if I can cobble together a crude "streaming media" server or not with this sort of thing... At least something like this should make a chat "room" style application easier (if RIM isn't already using it). - Porter Woodward