mac80211: handle protection mode, RIFS and ADDBA for HT IBSS
* Follow 802.11n-2009 9.13.3.1 for protection mode and ADDBA
* Send ADDBA only to HT STAs - implement 11.5.1.1 partially
Signed-off-by: Simon Wunderlich <siwu@hrz.tu-chemnitz.de>
Signed-off-by: Mathias Kretschmer <mathias.kretschmer@fokus.fraunhofer.de>
Reviewed-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/net/mac80211/ibss.c b/net/mac80211/ibss.c
index 7d84af7..a82f6b4 100644
--- a/net/mac80211/ibss.c
+++ b/net/mac80211/ibss.c
@@ -896,6 +896,7 @@
struct cfg80211_ibss_params *params)
{
struct sk_buff *skb;
+ u32 changed = 0;
skb = dev_alloc_skb(sdata->local->hw.extra_tx_headroom +
36 /* bitrates */ +
@@ -951,6 +952,23 @@
ieee80211_recalc_idle(sdata->local);
mutex_unlock(&sdata->local->mtx);
+ /*
+ * 802.11n-2009 9.13.3.1: In an IBSS, the HT Protection field is
+ * reserved, but an HT STA shall protect HT transmissions as though
+ * the HT Protection field were set to non-HT mixed mode.
+ *
+ * In an IBSS, the RIFS Mode field of the HT Operation element is
+ * also reserved, but an HT STA shall operate as though this field
+ * were set to 1.
+ */
+
+ sdata->vif.bss_conf.ht_operation_mode |=
+ IEEE80211_HT_OP_MODE_PROTECTION_NONHT_MIXED
+ | IEEE80211_HT_PARAM_RIFS_MODE;
+
+ changed |= BSS_CHANGED_HT;
+ ieee80211_bss_info_change_notify(sdata, changed);
+
ieee80211_queue_work(&sdata->local->hw, &sdata->work);
return 0;