4.3 BSD ethernet multicast question

[William R. King]

I have a need to send/receive multicast packets on our ethernet. There are
two questions I have before I go hacking at the kernel. 1) Is there a 
generally accepted socket ioctl for doing this? If so what is it called.
2) Does anyone have any idea how to put a DEC DEUNA into multicast 
reception mode? It sure would be nice if DEC sold documentation to their
controllers. The O/S in question is BSD 4.3-tahoe. 

Bill King
{decvax,uunet,pyramid}!abvax!wrk