Wait a minute...
> Moreover, if the packets destination address is a unicast address,
> an ICMP Destination Unreachable message [4] with Code 2 ("beyond
> scope of source address") is sent to the source of the original
> packet. Note: Code 2, as defined in [4], had a different
> semantics, but the semantics has already been obsolete and the
> IANA is going to re-assign the value for the new purpose.
.. isn't this code still needed/useful if one has <src=link-local,
dst=global>, and packet falls into forwarding to another link?
At least I don't have any special handling for link locals here, they
get automaticly handled by scoping rules, e.g. beyond scope of source...
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