Hi, On Mon, May 27, 2013 at 12:36:39AM +0200, Samuel Thibault wrote: > Gert Doering, le Sat 25 May 2013 13:58:19 +0200, a écrit : > > > To make it short: yes, the ipv6 pool environment variables are useful, > > > for user-defined scripts to be run at connection for instance to > > > propagate routes, do accounting, etc. The patch below adds them. > > > > You keep claiming that "yes it's useful". The lack of feedback on the > > list is partly due to the "To make it short" part of your mail... > > Ok. I was simply wondering whether it had perhaps got somehow dropped > without reason. > > As I mentioned too briefly, the reason we need it is the same as for the > IPv4 case: to announce the route to our bird daemon on connection, and > drop it on disconnection.
Mmmmh. Trying to understand this: so you're not using a common /64 for
the tun addresses (= the ifconfig-ipv6-pool), but each client gets some
other address, which is then announced on-demand by bird?
I can see that this is useful, but the naming of the environment variables
in this case is more confusing, as it's not really related to the *pool*.
Have you looked at the learn-address script? I use something similar
at a customer (adding and removing proxy-arp entries on client connect)
and learn-address does all I need just fine...
> > So the only thing that I couldn't see right away
> > in the environment is "what IPv6 address did the remote receive?" and
> > that one *is* available as parameter to the "learn-address" script already
> > today...
>
> But we need it from the disconnect script too, to remove the route
> announcement. It is available for IPv4, I don't see why things should
> be different between IPv6 and IPv4 here. It would make our script way
> more obscure for sure (having to record the route somewhere, re-read on
> disconnect).
Well, learn-address is run on disconnect, but not "right away" - true,
so having it in disconnect is useful.
I wonder whether we should also export iroute-ipv6 settings, as that would
enable on-demand routing of more than a single IPv6 address.
... need to think more about this.
But thanks anyway for explaining your use case.
gert
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