Hi,
I want to attach a custom IE to beacons, but some drivers (like b43)
are fetching their beacons via ieee80211_beacon_get() only once and
retransmit this beacon every time.
Some other drivers (like mac80211_hwsim, ath9k) are calling it
before every beacon transmission.
Is there a general way to make all drivers generate new beacons instead
of caching them or would I have to adapt them?
If adapting drivers is the only way, do you have any suggestions on
how to do that?
Thank you for your answers.
Regards,
Reiner
On Fri, 2009-07-03 at 09:15 +0200, Reiner Herrmann wrote:
> I want to attach a custom IE to beacons,
Umm, afaik you can configure that in hostapd, if not then you need to
hack hostapd.
johannes
Reiner Herrmann wrote:
> Hi,
>
> I want to attach a custom IE to beacons, but some drivers (like b43)
> are fetching their beacons via ieee80211_beacon_get() only once and
> retransmit this beacon every time.
> Some other drivers (like mac80211_hwsim, ath9k) are calling it
> before every beacon transmission.
>
> Is there a general way to make all drivers generate new beacons instead
> of caching them or would I have to adapt them?
> If adapting drivers is the only way, do you have any suggestions on
> how to do that?
Hi Reiner
the drivers that call ieee80211_beacon_get() only once, have
hardware that transmits beacons automatically. That is, the
beacon template from ieee80211_beacon_get() is stored in the
hardware and the hardware then automatically sends that while
updating a few fields as needed.
In other words, the driver doesn't know anything about the
beacons after the initial setup, and thus can't call ieee80211_beacon_get().
No caching is involved. :-)
So to do what you want, you need to disable the automatic
beaconing and use packet injection and send your beacons
as raw frames.
Best regards,
Iwo