mac80211: TDLS: add proper HT-oper IE
When 11n peers performs a TDLS connection on a legacy BSS, the HT operation IE must be specified according to IEEE802.11-2012 section 9.23.3.2. Otherwise HT-protection is compromised and the medium becomes noisy for both the TDLS and the BSS links. Signed-off-by: Arik Nemtsov <arikx.nemtsov@intel.com> Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
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0d440ea294
Коммит
57f255f581
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@ -188,7 +188,7 @@ ieee80211_ibss_build_presp(struct ieee80211_sub_if_data *sdata,
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* keep them at 0
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*/
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pos = ieee80211_ie_build_ht_oper(pos, &sband->ht_cap,
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chandef, 0);
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chandef, 0, false);
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/* add VHT capability and information IEs */
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if (chandef->width != NL80211_CHAN_WIDTH_20 &&
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@ -1962,7 +1962,7 @@ u8 *ieee80211_ie_build_ht_cap(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
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u16 cap);
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u8 *ieee80211_ie_build_ht_oper(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
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const struct cfg80211_chan_def *chandef,
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u16 prot_mode);
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u16 prot_mode, bool rifs_mode);
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u8 *ieee80211_ie_build_vht_cap(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
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u32 cap);
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u8 *ieee80211_ie_build_vht_oper(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
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@ -466,7 +466,8 @@ int mesh_add_ht_oper_ie(struct ieee80211_sub_if_data *sdata,
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pos = skb_put(skb, 2 + sizeof(struct ieee80211_ht_operation));
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ieee80211_ie_build_ht_oper(pos, ht_cap, &sdata->vif.bss_conf.chandef,
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sdata->vif.bss_conf.ht_operation_mode);
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sdata->vif.bss_conf.ht_operation_mode,
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false);
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return 0;
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}
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@ -591,12 +591,19 @@ ieee80211_tdls_add_setup_cfm_ies(struct ieee80211_sub_if_data *sdata,
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offset = noffset;
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}
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/* if HT support is only added in TDLS, we need an HT-operation IE */
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/*
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* if HT support is only added in TDLS, we need an HT-operation IE.
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* add the IE as required by IEEE802.11-2012 9.23.3.2.
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*/
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if (!ap_sta->sta.ht_cap.ht_supported && sta->sta.ht_cap.ht_supported) {
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u16 prot = IEEE80211_HT_OP_MODE_PROTECTION_NONHT_MIXED |
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IEEE80211_HT_OP_MODE_NON_GF_STA_PRSNT |
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IEEE80211_HT_OP_MODE_NON_HT_STA_PRSNT;
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pos = skb_put(skb, 2 + sizeof(struct ieee80211_ht_operation));
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/* send an empty HT operation IE */
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ieee80211_ie_build_ht_oper(pos, &sta->sta.ht_cap,
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&sdata->vif.bss_conf.chandef, 0);
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&sdata->vif.bss_conf.chandef, prot,
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true);
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}
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ieee80211_tdls_add_link_ie(sdata, skb, peer, initiator);
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@ -2292,7 +2292,7 @@ u8 *ieee80211_ie_build_vht_cap(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
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u8 *ieee80211_ie_build_ht_oper(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
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const struct cfg80211_chan_def *chandef,
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u16 prot_mode)
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u16 prot_mode, bool rifs_mode)
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{
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struct ieee80211_ht_operation *ht_oper;
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/* Build HT Information */
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@ -2320,6 +2320,9 @@ u8 *ieee80211_ie_build_ht_oper(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
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chandef->width != NL80211_CHAN_WIDTH_20)
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ht_oper->ht_param |= IEEE80211_HT_PARAM_CHAN_WIDTH_ANY;
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if (rifs_mode)
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ht_oper->ht_param |= IEEE80211_HT_PARAM_RIFS_MODE;
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ht_oper->operation_mode = cpu_to_le16(prot_mode);
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ht_oper->stbc_param = 0x0000;
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