Re: [ath9k-devel] ath9k mesh point not emitting beacons

Re: [ath9k-devel] ath9k mesh point not emitting beacons

[Luis R. Rodriguez]

On Wed, Jul 28, 2010 at 11:50 PM, Abhijeet Chandran
<Abhijeet.Chandran@aricent.com> wrote:
>
> Hi Luis
>
> Thanks for the link . But our real problem is that the mesh interface that we are creating using iw is not behaving like a mesh point but rather like a wifi station. I have the following observations:
>
> 1. iw phy phy0 interface add mesh0 type mp mesh_id mymesh
>
>  .ieee80211_open  is called in mac80211 for interface mesh0 with type NL80211_IFTYPE_MESH_POINT
>  .Ath9k driver attaches an interface of type NL80211_IFTYPE_MESH_POINT
>  .ieee80211_stop is called in mac80211 for interface mesh0 with type NL80211_IFTYPE_MESH_POINT
>  .Ath9k  driver detached the  interface of type NL80211_IFTYPE_MESH_POINT
>  .The sdata for the interface mesh0 is flushed in mac80211.
>  .ieee80211_open  is called in mac80211 for interface mesh0 with type NL80211_IFTYPE_STATION
>  .Ath9k driver attaches an interface of type NL80211_IFTYPE_STATION .
>
> From this point on the interface behaves like a wifi station  and not as a mesh point. We have not yet figured out why the mesh interface is removed and reset to an interface of type NL80211_IFTYPE_STATION.

Javier would be the best person to review this.

 Luis

> Regards
> Abhijeet
>
> -----Original Message-----
> From: Luis R. Rodriguez [mailto:mcgrof@gmail.com]
> Sent: Wednesday, July 28, 2010 9:23 PM
> To: Abhijeet Chandran
> Cc: ath9k-devel@lists.ath9k.org
> Subject: Re: [ath9k-devel] ath9k mesh point not emitting beacons
>
> On Wed, Jul 28, 2010 at 7:19 AM, Abhijeet Chandran <Abhijeet.Chandran@aricent.com> wrote:
>> Hi
>> We have a problem that we have configured a  mesh point for the first
>> time and  it  does not seem to start emitting beacons as soon as it comes up.
>> The card we are using is ath 9220
>> We brought mesh point up , ex:
>> # iw phy phy0 interface add mesh type mp mesh_id mymesh # ifconfig
>> mesh up
>>
>> Through tracing in the kernel module mac80211  it appears that a
>> callback function ieee80211_open is called with type mesh point as
>> soon as the above commands are executed.
>> However it  is immediately followed by the callback function
>> ieee80211_stop (usually called when the mesh point is brought down) ,
>> following which the meshpoint related sdata is flushed .
>> Another question that we have is that do we need to enable scanning
>> for the mesh point to emit beacons/probes?
>>
>> We have used the simulator mac80211_hwsim before  in which beacons are
>> emitted as soon as the mesh point comes up.In the simulator don't need
>> to start scanning on the mesh point.
>> We'd really appreciate if somone can help us out here.
>
> Known issue no one has yet looked into:
>
> https://bugzilla.kernel.org/show_bug.cgi?id=14187
>
> It should start beaconing if you issue a scan.
>
>  Luis
>
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