[PATCH] driver_wext.c: Make sure that interface is UP

Mike van Niekerk mvniekerk at gmail.com
Thu Dec 10 03:47:52 EST 2009


The person that submitted this patch is my hero. I've been battling with
Android to get reconnections working but it will fail after associating.
This is the reason - Android's WiFi manager will ifdown the interface after
disconnection. I could not find the error and even bugged the manufacturer
for a defective wext driver.

Thanks a million. Seriously, you are awesome!

On Tue, Dec 8, 2009 at 3:34 PM, Jouni Malinen <j at w1.fi> wrote:

> On Mon, Dec 07, 2009 at 02:25:15PM -0800, Dmitry Shmidt wrote:
>
> > You are right in general. But there are several scenarios where it is
> > just easier to control interface
> > from the wpa_supplicant driver layer itself.
> > For example, you've associated, connected and got IP by dhcp client.
> > You were disassociated, lost connection and network manager turned off
> > interface to prevent trying to access it.
> > Then you are trying to reassociate and key exchange will fail.
>
> If a network manager turned off the interface, why would it not turn it
> on when the connection is supposed to be used? I would assume there was
> a reason for setting the interface down in this case and it does not
> sound like a good idea for wpa_supplicant to just turn it back on.
>
> > My point is that relying on network manager to keep interface in
> > proper state may cause wpa_supplicant to
> > fail to complete association.
>
> I would be fine with making wpa_supplicant not try to associate if the
> interface is set down while wpa_supplicant is running (and then
> re-enable wpa_supplicant when the interface is set up again).
>
> --
> Jouni Malinen                                            PGP id EFC895FA
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