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Re: [PATCH v3 0/2] mac80211: add U-APSD client support

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Johannes Berg <johannes@xxxxxxxxxxxxxxxx> writes:

> On Thu, 2009-12-03 at 12:25 -0800, Jason Young wrote:
>
>> The bit values for IEEE80211_WMM_IE_STA_SP_XXX are not correct.  The Max SP
>> Length subfield settings table in 7.3.1.17 has the least significant bit listed
>> first.
>> 
>> #define IEEE80211_WMM_IE_STA_SP_ALL  (0<<5)
>> #define IEEE80211_WMM_IE_STA_SP_2     (1<<5)  /* or (BIT(5)) */
>> #define IEEE80211_WMM_IE_STA_SP_4     (2<<5)  /* or (BIT(6)) */
>> #define IEEE80211_WMM_IE_STA_SP_6     (3<<5)  /* or (BIT(5) | BIT(6)) */
>
> Can somebody clarify for me which part of this stuff is WMM, and which
> is "real" 802.11 QoS?

I took a quick peek of the 802.11-2007 QoS part. My observation was
that the terms are the same, but that's about it. For example QoS Info
field is reversed, APSD capability is advertised through beacon
capability bits and naturally there are proper ids for IEs.

So they are very similar but the frame handling has to be more or less
rewritten for 802.11 QoS.

BTW, are there clients which support 802.11 QoS? Should we consider
adding it to mac80211, for example? Thoughts?

-- 
Kalle Valo
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