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>

1 files changed, 5 insertions, 0 deletions

diff --git a/net/mac80211/util.c b/net/mac80211/util.c
index 5243c2cadeef..ac7ea2949de0 100644
--- a/net/mac80211/util.c
+++ b/net/mac80211/util.c
@@ -1587,6 +1587,11 @@ u8 *ieee80211_ie_build_ht_info(u8 *pos,
         }
         if (ht_cap->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40)
                 ht_info->ht_param |= IEEE80211_HT_PARAM_CHAN_WIDTH_ANY;
+
+        /*
+         * Note: According to 802.11n-2009 9.13.3.1, HT Protection field and
+         * RIFS Mode are reserved in IBSS mode, therefore keep them at 0
+         */
         ht_info->operation_mode = 0x0000;
         ht_info->stbc_param = 0x0000;