> Not sure if this is possible, but I'd like to be able to have a single stack, > let's call it the instructors stack, send out a text message to multiple > stacks all within a single classroom network all at one time. The "multiple > stacks" would be student stacks. > > > I have had a look at some of the sample stacks in the "User Spaces" > specifically the work that AlexTweedly has done with his "TCP and UDP" > stacks, but have yet to determine if sockets would work in a implementation > as i have described. I get the impression that sockets is something that can > only occur between two stacks, not between one and many, or many to many. > > Or, do sockets allow you to open multiple sockets in order to facilitate > mutliple connections to a single server stack? > > What I would like to get to is a Revolution based system similar to a > classroom performance system (http://www.pearsonncs.com/cps/) but utilizing > laptops and the improved capabilities of Revolution. >
I can't remember the exact details, but I seem to recall that you can broadcast a message over a UDP port by using IP address 255.255.255.255 Choose a certain port number (50000 in my examples) and on the instructor's computer open a socket to that port: open socket to "255.255.255.255:50000" Send data out that port: write "Hello there" to socket "255.255.255.255:50000" Have the student computers listen on that port number: accept datagram connections on port 50000 with message doMessage The doMessage handler can get the received data and process it. Dar Scott had a UDP stack that demonstrated this better than I can explain it. Cheers, Sarah _______________________________________________ use-revolution mailing list [email protected] Please visit this url to subscribe, unsubscribe and manage your subscription preferences: http://lists.runrev.com/mailman/listinfo/use-revolution
