Re: [PATCH v4 3/7] test: Wait for DAD on DHCPv6 addresses

[Stefano Brivio <sbrivio@redhat.com>]

On Thu, 17 Oct 2024 16:33:00 +1100
David Gibson <david@gibson.dropbear.id.au> wrote:

> After running dhclient -6 we expect the DHCPv6 assigned address to be
> immediately usable.  That's true with the Fedora dhclient-script (and the
> upstream ISC DHCP one), however it's not true with the Debian
> dhclient-script.  The Debian script can complete with the address still
> in "tentative" state, and the address won't be usable until Duplicate
> Address Detection (DAD) completes.  That's arguably a bug in Debian (see
> link below), but for the time being we need to work around it anyway.
> 
> We usually get away with this, because by the time we do anything where the
> address matters, DAD has completed.  However, it's not robust, so we should
> explicitly wait for DAD to complete when we get an DHCPv6 address.
> 
> Link: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1085231
> 
> Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
> ---
>  test/passt/dhcp       | 2 ++
>  test/pasta/dhcp       | 2 ++
>  test/two_guests/basic | 3 +++

What about the equivalent cases in passt_in_ns/dhcp and perf/passt_tcp?

-- 
Stefano