Messages in this thread | | | Date | Mon, 18 Jul 2016 09:38:24 -0400 | From | Bob Copeland <> | Subject | Re: [PATCH 3/3] mac80211: mesh: fixed HT ies in beacon template |
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On Wed, Jul 13, 2016 at 02:45:40PM +0300, Yaniv Machani wrote: > The HT capab info field inside the HT capab IE of the mesh beacon > is incorrect (in the case of 20MHz channel width). > To fix this driver will check configuration from cfg and > will build it accordingly.
> + /* determine capability flags */ > + cap = sband->ht_cap.cap; > + > + /* if channel width is 20MHz - configure HT capab accordingly*/ > + if (sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_20) { > + cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; > + cap &= ~IEEE80211_HT_CAP_DSSSCCK40; > + }
Is it required that HT capability match the HT operation in this case?
> diff --git a/net/mac80211/util.c b/net/mac80211/util.c > index 42bf0b6..5375a82 100644 > --- a/net/mac80211/util.c > +++ b/net/mac80211/util.c > @@ -2349,10 +2349,7 @@ u8 *ieee80211_ie_build_ht_oper(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap, > ht_oper->operation_mode = cpu_to_le16(prot_mode); > ht_oper->stbc_param = 0x0000; > > - /* It seems that Basic MCS set and Supported MCS set > - are identical for the first 10 bytes */ > memset(&ht_oper->basic_set, 0, 16); > - memcpy(&ht_oper->basic_set, &ht_cap->mcs, 10);
This change doesn't look right (basic mcs set will be all zeroes) but then, neither does the original code. Basic MCS set for a mesh STA should be the mandatory MCSes according to 9.7.4.
-- Bob Copeland %% http://bobcopeland.com/
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