Commit 2cedd879 authored by Arik Nemtsov's avatar Arik Nemtsov Committed by Johannes Berg
Browse files

mac80211: add BSS coex IE to TDLS setup frames



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: default avatarArik Nemtsov <arikx.nemtsov@intel.com>
Signed-off-by: default avatarArik Nemtsov <arik@wizery.com>
Signed-off-by: default avatarJohannes Berg <johannes.berg@intel.com>
parent f0d29cb9
......@@ -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
*
......
......@@ -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)
......
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