The default, non-compliant, behavior will pass all multicast packets to any socket bound to 0.0.0.0 or the mcast address, regardless of which groups, on which interfaces, that socket has joined.
The default, non-compliant, behavior will pass all multicast packets to any socket bound to 0.0.0.0 or the mcast address, regardless of which groups, on which interfaces, that socket has joined.