Lilian,
>
> RFC 2373 states that:
> "The unspecified address must not be used as the destination address
> of IPv6 packets or in IPv6 Routing Headers."
>
> However it seems that certain stacks are using this address in a different
> way.
>
> When '::' is the destination address:
> - some use the first available interface's address
> - some use the loopback address
>
> Is there a chance that one of these will become the acceptable norm? It
> would be interesting to know if the majority of implementations actually
> return an error for this case.
>
The convention used by BSD for IPv4 was to map INADDR_ANY to the address
of the first available interface. At least that is what I see in the 4.4
BSD lite source for in_pcbconnect. I assume that both of the above described
IPv6 behaviors are an attempt to emulate this IPv4 behavior.
I see little upside in attempting to standardize this behavior since no
fielded implementation will be able to change regardless of what behavior
is standardized.
tim
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