Broadcast/multicast packet notification through pfhooks [PSARC/2007/666 FastTrack timeout 12/03/2007]

[James Carlson]

Darren Reed writes:
> These two bit values indicate if the packet is multicast or if it
> is broadcast, however, using DLPI in Solaris today, it is not possible to
> know if a packet that reaches IP is multicast or broadcast by looking
> at the dl_group_address field and nor is there any other mechanism
> available.  In light of this, setting both flags together is supported
> as an indication that the packet might be one or the other:
> 
> #define HPE_MBCAST              0x03

Do the clients using this interface need to know the difference
between multicast and broadcast in order to function correctly?

If so, then why not have this interface resolve the amibiguity?  That
can be done by checking the destination address (dl_dest_addr_*) when
you see that dl_group_address is set.

-- 
James Carlson, Solaris Networking              <james.d.carlson at sun.com>
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