Add the BSS coex IE in case we support HT40 channels, as mandated by
section 8.5.13 in IEEE802.11 2012.
Signed-off-by: Arik Nemtsov <arikx.nemt...@intel.com>
Reviewed-by: Johannes Berg <johannes.b...@intel.com>
Signed-off-by: Arik Nemtsov <a...@wizery.com>
---
include/linux/ieee80211.h | 3 +++
net/mac80211/tdls.c | 15 +++++++++++++++
2 files changed, 18 insertions(+)
diff --git a/include/linux/ieee80211.h b/include/linux/ieee80211.h
index 4e2bb91..adac1be 100644
--- a/include/linux/ieee80211.h
+++ b/include/linux/ieee80211.h
@@ -2037,6 +2037,9 @@ enum ieee80211_tdls_actioncode {
/* TDLS specific payload type in the LLC/SNAP header */
#define WLAN_TDLS_SNAP_RFTYPE 0x2
+/* BSS Coex IE information field bits */
+#define WLAN_BSS_COEX_INFORMATION_REQUEST BIT(0)
+
/**
* enum - mesh synchronization method identifier
*
diff --git a/net/mac80211/tdls.c b/net/mac80211/tdls.c
index 8fb314b..30a4c10 100644
--- a/net/mac80211/tdls.c
+++ b/net/mac80211/tdls.c
@@ -117,6 +117,16 @@ ieee80211_tdls_add_supp_channels(struct
ieee80211_sub_if_data *sdata,
*pos = 2 * subband_cnt;
}
+static void ieee80211_tdls_add_bss_coex_ie(struct sk_buff *skb)
+{
+ u8 *pos = (void *)skb_put(skb, 3);
+
+ *pos++ = WLAN_EID_BSS_COEX_2040;
+ *pos++ = 1; /* len */
+
+ *pos++ = WLAN_BSS_COEX_INFORMATION_REQUEST;
+}
+
static u16 ieee80211_get_tdls_sta_capab(struct ieee80211_sub_if_data *sdata,
u16 status_code)
{
@@ -341,6 +351,10 @@ ieee80211_tdls_add_setup_start_ies(struct
ieee80211_sub_if_data *sdata,
rcu_read_unlock();
+ if (ht_cap.ht_supported &&
+ (ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40))
+ ieee80211_tdls_add_bss_coex_ie(skb);
+
/* add any remaining IEs */
if (extra_ies_len) {
noffset = extra_ies_len;
@@ -597,6 +611,7 @@ ieee80211_tdls_prep_mgmt_packet(struct wiphy *wiphy, struct
net_device *dev,
2 + max(sizeof(struct ieee80211_ht_cap),
sizeof(struct ieee80211_ht_operation)) +
50 + /* supported channels */
+ 3 + /* 40/20 BSS coex */
extra_ies_len +
sizeof(struct ieee80211_tdls_lnkie));
if (!skb)
--
1.9.1
--
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