linux-kernel - Re: Problem with bridges and wireless NIC's

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Date:	Mon, 1 Mar 2010 09:12:48 +0100
From:	Bjarke Istrup Pedersen <gurligebis@...too.org>
To:	Jouni Malinen <j@...fi>
Cc:	linux-kernel@...r.kernel.org, linux-wireless@...r.kernel.org
Subject: Re: Problem with bridges and wireless NIC's

2010/3/1 Jouni Malinen <j@...fi>:
> On Sun, Feb 28, 2010 at 11:58:10PM +0100, Bjarke Istrup Pedersen wrote:
>
>> There is a problem when trying to create a bridge containing a normal
>> NIC and a wireless NIC, and using hostapd.
>>
>> The problem is, that it is not possible to create a bridge containing
>> a wireless NIC, if it hasn't been setup first.
>>
>> Does anyone have a solution for this?
>
> How about first creating the br0, then starting hostapd, and finally
> adding wlan0 into br0?
>
>> (The commit that introduced this problem is
>> ad4bb6f8883a13bb0f65b194dae36c62a02ac779 , reverting it solves the
>> problem).
>
> I don't know whether I would call that a solution, but well..
>
>> For more info, please have a look at this bug report:
>> http://bugs.gentoo.org/show_bug.cgi?id=298824
>
> I'm not sure whether I understood the description correctly, but this
> sounds like a limitation in the way the network setup is done. Forcing
> br0 to be created with wlan0 before wlan0 has been configured is not
> going to work. I would consider removing wlan0 from the static
> configuration of br0 and just creating br0 with eth0 with the setup
> scripts and allowing hostapd to add wlan0 into br0 once the interface
> has been configured properly (support for this was added in hostapd
> 0.7.1).
>
> --
> Jouni Malinen                                            PGP id EFC895FA
> --
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>

Hey,

That sounds interresting, is there any chance that that functionality
can be added to the 0.6.x branch too? (I'm maintaining hostapd in
Gentoo, but cannot stabilize a 0.7.x build, due to it being a
development branch)

Best regards,
Bjarke I. Pedersen
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