Well, I see.
I am newly to freebsd, thanks for your answering.
I had tried using this section of code and found these flags are not satisfied,
after changing them, I can negotiate VHT80, VHT160 fine with iwm, so I pointed
out this problem. I am also wondering what's the badly wrong of you said in
draft VHT implementation?
thanks
zxystd
> 2021年3月30日 上午1:26，Adrian Chadd <adr...@freebsd.org> 写道：
>
> hm!
>
> On Mon, 29 Mar 2021 at 08:02, qcwap <1051244...@qq.com> wrote:
>>
>> This patch corrects ieee80211_vht_get_vhtcap_ie for 160/80P80 channel width
>> recognition.
>>
>> diff --git a/sys/net80211/ieee80211.h b/sys/net80211/ieee80211.h
>> index 86ab1459cca..76c43629b33 100644
>> --- a/sys/net80211/ieee80211.h
>> +++ b/sys/net80211/ieee80211.h
>> @@ -811,9 +811,9 @@ struct ieee80211_ie_vht_operation {
>> #define IEEE80211_VHTCAP_SUPP_CHAN_WIDTH_MASK 0x0000000C
>> #define IEEE80211_VHTCAP_SUPP_CHAN_WIDTH_MASK_S 2
>> #define IEEE80211_VHTCAP_SUPP_CHAN_WIDTH_NONE 0
>> -#define IEEE80211_VHTCAP_SUPP_CHAN_WIDTH_160MHZ 1
>> -#define IEEE80211_VHTCAP_SUPP_CHAN_WIDTH_160_80P80MHZ 2
>> -#define IEEE80211_VHTCAP_SUPP_CHAN_WIDTH_RESERVED 3
>> +#define IEEE80211_VHTCAP_SUPP_CHAN_WIDTH_160MHZ 4
>> +#define IEEE80211_VHTCAP_SUPP_CHAN_WIDTH_160_80P80MHZ 8
>> +#define IEEE80211_VHTCAP_SUPP_CHAN_WIDTH_RESERVED 16
>>
>> #define IEEE80211_VHTCAP_SUPP_CHAN_WIDTH_IS_160MHZ(_vhtcaps)
>> \
>> (_IEEE80211_MASKSHIFT(_vhtcaps, IEEE80211_VHTCAP_SUPP_CHAN_WIDTH_MASK)
>> >= \
>
>
> This is the flag change from the draft 11ac spec to the released 11ac
> spec, right?
>
> I remember they needed to change the flags because existing draft
> implementations got the 80+80/160MHz negotiation really badly wrong in
> some interop places...
>
>
> -adrian
>
>>
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