Re: question about socket with link local addr

Jim,

Your issue is not with the socket interface but with the behaviour of the
stack.

A stack which conforms to the current spec will know to ARP for the LL
destination and send the packet directly to the destination even if the
source has a routable address. If there is no response to the ARP the packet
will be discarded.

However, since this is a draft spec which has been changing recently, it is
very likely that mainstream stacks such as Mac, Windows or Linux will not
conform to these rules. To find which rules they do follow, you would have
to investigate each stack individually. I would expect to find a wide
variety of behaviours - remember all of these operating systems have been
through many versions and revisions of TCP/IP stack.

Philip Nye