[ath9k-devel] AP + IBSS in different ath9k versions

["Gabriel Tolón" <gtolon@inti.gob.ar>]

Ok, i guess i can find that commits and comments on the wireless-testing 
git. i?ll dig into the code and the 80211 standard to analyze the 
beaconing problem also. Your answers have been very useful.

Regards


El 22/07/2011 12:05 p.m., Mohammed Shafi escribi?:
> On Fri, Jul 22, 2011 at 7:14 PM, Gabriel Tol?n<gtolon@inti.gob.ar>  wrote:
>> Thank you for your answer. I?ll put it in two different cases:
>>
>>   1) with the ath9k driver with comes with compat wireless 2.6.39-1:
>>
>>     Yes, like you said that ?s the message i get from dmesg when i try to
>> create the ad-hoc interface after another interface is up. However if i
>> first create the ad-hoc interface then i can bring up the original     wlan0
>> and run hostapd on it. But when i try to create an IBSS with "ibss join" i
>> get "device or resource bussy". I don?t know why the order of interface
>> creation/bringing up is important in this case.
> this check might be missing there
>
> commit 59575d1c717815d62f1b5aeac74e5e60a1b27428
> Author: Rajkumar Manoharan<rmanoharan@atheros.com>
> Date:   Mon Apr 4 22:56:16 2011 +0530
>
>      ath9k: deny new interface addtion on IBSS mode
>
>      The present check denies the IBSS interface addtion if we
>      already have any other vifs. But it fails to deny interface
>      addition if IBSS was already present.
>
>      Signed-off-by: Rajkumar Manoharan<rmanoharan@atheros.com>
>      Signed-off-by: John W. Linville<linville@tuxdriver.com>
>
>>   2) with older ath9k versions, for example compat wireless 2.6.32-16:
>>
>>     In this case i can run hostapd in wlan0 and then create and bring up an
>> ad-hoc interface without problems, furthermore i can join to an ibss with
>> "iw ibss join" and all works fine.
> commit 4801416c76a3a355076d6d371c00270dfe332e1c
> Author: Ben Greear<greearb@candelatech.com>
> Date:   Sat Jan 15 19:13:48 2011 +0000
>
>      ath9k: Fix up hardware mode and beacons with multiple vifs.
>
>>
>> The main doubt i have is why the case 2) is not supported anymore, if is
>> something wrong about it. Thank you again.
> I am not aware of the details, but I think it is because of TSF timer
> handling in driver
>>
>>
>>
>> El 22/07/2011 02:03 a.m., Mohammed Shafi escribi?:
>>> On Fri, Jul 22, 2011 at 1:15 AM, Gabriel Tol?n<gtolon@inti.gob.ar>    wrote:
>>>> Hi
>>>>
>>>> I?ve been using an Atheros 9285 chipset in a 2.6.32-32 kernel with ath9k
>>>> and two virtual interfaces, one in ad-hoc mode and the other in master
>>>> mode using hostapd. That configuration worked fine, with some computers
>>>> connected to the Acces Point and others to the IBSS running in the
>>>> ad-hoc interface. The only problem was that when bringing up the IBSS
>>>> (using iw) the interface using hostapd stopped sending beacons, but as
>>>> far as i understood all kept working thanks to the probe requests and
>>>> responses.
>>>>
>>>> Then i upgraded the ath9k driver using compat wireless-2.6.32.16 and all
>>>> worked like before. But when i used the ath9k driver of compat
>>>> wireless-2.6.39-1 i couldn ?t bring the IBSS up when the hostapd was
>>>> running (i could bring the ad hoc interface up, but not the IBSS with
>>>> "iw ibss join"). I?d like to know if this configuration is not supported
>>>> or will not be supported anymore, and if it could be possible to have
>>>> the AP beaconing together with an IBSS. Thank you!
>>> you would have got ?
>>> [ 2841.528600] ath: Cannot create ADHOC interface when other
>>> interfaces already exist.
>>>
>>> because of this check in main.c
>>>
>>>    if ((ah->opmode == NL80211_IFTYPE_ADHOC) ||
>>>              ((vif->type == NL80211_IFTYPE_ADHOC)&&
>>>               sc->nvifs>    0)) {
>>>                  ath_err(common, "Cannot create ADHOC interface when other"
>>>                          " interfaces already exist.\n");
>>>                  ret = -EINVAL;
>>>                  goto out;
>>>          }
>>>
>>>
>>>
>>>
>>>>
>>>> _______________________________________________
>>>> ath9k-devel mailing list
>>>> ath9k-devel at lists.ath9k.org
>>>> https://lists.ath9k.org/mailman/listinfo/ath9k-devel
>>>>
>>>
>>
>
>