Makes sense.
Can we ever have a packet that has a source address with INADDR_BROADCAST or IN_MULTICAST? I can't think of such a case.
Can we ever have a packet with destination address INADDR_ANY? Maybe for BOOTP? But then the source address would be 0.0.0.0 too?
IIRC, in case you have an IP-less interface and you want to subscribe it to some multicast address, the outgoing packet source address is 0.0.0.0.
--
Daniel C. Sobral
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