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Re: QoS frames in AP mode?

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On Thu, Dec 15, 2011 at 6:00 PM, Johannes Berg
<johannes@xxxxxxxxxxxxxxxx> wrote:
> On Thu, 2011-12-15 at 17:30 +0100, Helmut Schaa wrote:
>> just noticed a problem with QoS frames in AP mode when mac80211
>> relays for example a VOIP frame from STA1 to STA2 the frame will be
>> sent out on AC_BE and not on AC_VO.
>
> Hm. You want (T)DLS ;-)

Would be nice but if the clients don't support it we're out of luck :)

>> Unfortunately we don't have an skb priority between 256 and 263 and
>> we don't have skb->protocol set to ETH_P_IP here since we've just set
>> it to ETH_P_802_3.
>>
>> I tried using eth_type_trans on the frame but that will "pull" the ethernet
>> header and adding an skb_push afterwards seems a little bit ugly to me.
>>
>> Is it possible to just shortcut the classification if the priority is
>> already set?
>> Or should we just add 256 to the priority before sending the frame to
>> dev_queue_xmit?
>>
>> What would be an appropriate fix for this?
>
> The >= 256 is already a shortcut, so just adding 256 seems reasonable?

Haven't tried that yet but I guess this works. However, if a client is
misbehaving and sending low priority frames with a high priority TID
we might want to re-classify the frame before sending to its
destination? Not sure though.

Helmut
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