Hi Johannes,

On 09/14/2017 02:17 PM, Johannes Berg wrote:
On Thu, 2017-09-14 at 13:37 -0500, Denis Kenzior wrote:

The question is whether all APs are actually sane after a
roam.  E.g. can the STA assume that the same IP address, DHCP lease,
etc is still valid?  I heard from various people that this might not
be the case, but we haven't had a chance to verify those claims...

I think you pretty much have to assume that, otherwise there's no point
in roaming at all - you want your connections to stay, possibly voice
calls to continue, etc.

I'm all for using this assumption. I just wonder if real world disagrees? :)

However, I'm not really convinced (any more) that this is actually
correct. If I'm reading the supplicant code correctly, then it sets
IF_OPER_UP only once the connection is *completed*, so it's already
doing what I thought it should be doing and couldn't.


Yes.  For a new connection it does something like:

New Key
Set Key
New Key (group)
Set Station (Authorized) (which fails on some drivers)
Set OperState to UP

Regards,
-Denis

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