mac80211: track AP and peer STA TDLS chan-switch support

The AP or peer can prohibit TDLS channel switch via a bit in the
extended capabilities IE. Parse the IE and track this bit. Set an
appropriate STA flag if both the AP and peer STA support TDLS
channel-switching.

Add the new STA flag and the missing TDLS_INITIATOR to debugfs.

Signed-off-by: Arik Nemtsov <arikx.nemtsov@intel.com>
Signed-off-by: Arik Nemtsov <arik@wizery.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

1 files changed, 7 insertions, 0 deletions

diff --git a/net/mac80211/cfg.c b/net/mac80211/cfg.c
index 3ecbf68dadf1..8195e65d8a91 100644
--- a/net/mac80211/cfg.c
+++ b/net/mac80211/cfg.c
@@ -1042,6 +1042,13 @@ static int sta_apply_parameters(struct ieee80211_local *local,
                         clear_sta_flag(sta, WLAN_STA_TDLS_PEER);
         }
 
+        /* mark TDLS channel switch support, if the AP allows it */
+        if (test_sta_flag(sta, WLAN_STA_TDLS_PEER) &&
+            !sdata->u.mgd.tdls_chan_switch_prohibited &&
+            params->ext_capab_len >= 4 &&
+            params->ext_capab[3] & WLAN_EXT_CAPA4_TDLS_CHAN_SWITCH)
+                set_sta_flag(sta, WLAN_STA_TDLS_CHAN_SWITCH);
+
         if (params->sta_modify_mask & STATION_PARAM_APPLY_UAPSD) {
                 sta->sta.uapsd_queues = params->uapsd_queues;
                 sta->sta.max_sp = params->max_sp;