In your previous mail you wrote (after reformatting into text):
3) When multicast addresses are stored in a sockaddr_in6, how is the
scope id field Interpreted?
=> I believe it should be an interface index because it is the way
it works today (or before scope id introduction if you prefer :-):
IPV6_MULTICAST_IF & IPV6_JOIN_GROUP deal with interfaces, not with
interface sets.
Another point en passant, should in this case a bind() with a non-zero
scope_id do an automatical IPV6_JOIN_GROUP?
Regards
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