Mark Wieder wrote:
Rev does support sending either broadcast or multicast - I can send UDP packets to 192.168.0.255 and also to 224.0.0.251 and receive them on my (on-Rev) echo server.AT> (And unfortunately, Rev doesn't support either multicast or PGM). AT> (Actually, I think Rev doesn't fully handle broadcast - I can get it to AT> send to a local-broadcast address and they are received by other devices AT> - but I can't get Rev to receive them ... will experiment some more with AT> that later)
This explains a lot. I had tried multicasting and decided there was
some problem with the network configuration. Tell me about PGM -
preferably off-list, since this is starting to get very OT, but I'm
posting the request here in case there's other interest.
But it doesn't support receiving them - there's no access to raw sockets or to setsocketopt(). Thus, there is no way to let the system know which multicast groups are to be received (necessary both to get the system to send / respond to IGMP packets as well as to set the correct bits in the Ethernet driver to receive the packets). (Not sure yet about receiving broadcast)
If there's anyone overhearing this and wondering what on earth multicast is, and wanting a techie intro http://www.cisco.com/warp/public/cc/pd/iosw/prodlit/ipimt_ov.htm
I'll send you PGM info off-list.
-- Alex Tweedly http://www.tweedly.net
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