[Openswan dev] Error building klips-ipv6 (missing include?)

[Paul Wouters]

On Mon, 11 Oct 2010, D. Hugh Redelmeier wrote:

> | I have been working a bit on the listen code, and I was considering an
> | option to just listen to ANY. I am not sure what the history was of not
> | listening on all IP's whenever they become available to the system.
> |
> | Perhaps Hugh or Hugh can sched some light on that?
>
> Off the top of my head, I can vaguely recollect two issues:
>
> - we want control of which interfaces are used.  The only way was to
>  control the IP addresses
>
> - we want to know the inbound IP address on each packet.  recvfrom
>  doesn't give you that, so we nail down which IP by only accepting
>  a specified IP address on each socket.  So we have to know the IP
>  address.
>
> Note: there seems to be something newish called recvfromto that is now
> half supported in the code, controlled by HAVE_UDPFROMTO.  But that
> code currently ignores to "to" that recvfromto returns.

Yes, we should use recvfromto instead of recvfrom in all cases.

The problem these days is that interfaces and IP's are quite dynamic, and
our old-style interface handling is not very appropriate anymore these
days.

Paul