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authorOleksij Rempel <linux@rempel-privat.de>2013-05-24 12:05:45 +0200
committerJohannes Berg <johannes.berg@intel.com>2013-05-24 12:07:25 +0200
commit786677d100600b7f6089bae0d3967c1b901a6141 (patch)
treeb6f0538e5bd62e09cc4249493c75dba180052f34 /net/mac80211
parentce85788846ec19dcb7bef0dcbcf83fb64630f426 (diff)
downloadop-kernel-dev-786677d100600b7f6089bae0d3967c1b901a6141.zip
op-kernel-dev-786677d100600b7f6089bae0d3967c1b901a6141.tar.gz
mac80211: add STBC flag for radiotap
Some chips can tell us if received frame was encoded with STBC or not. To make this information available in user space we can use updated radiotap specification: http://www.radiotap.org/defined-fields/MCS This patch will set number of STBC encoded spatial streams (Nss). The HAVE_STBC flag should be provided by driver. Signed-off-by: Oleksij Rempel <linux@rempel-privat.de> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Diffstat (limited to 'net/mac80211')
-rw-r--r--net/mac80211/rx.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/net/mac80211/rx.c b/net/mac80211/rx.c
index 6e2c8c5..7507f7c 100644
--- a/net/mac80211/rx.c
+++ b/net/mac80211/rx.c
@@ -258,6 +258,8 @@ ieee80211_add_rx_radiotap_header(struct ieee80211_local *local,
pos += 2;
if (status->flag & RX_FLAG_HT) {
+ unsigned int stbc;
+
rthdr->it_present |= cpu_to_le32(1 << IEEE80211_RADIOTAP_MCS);
*pos++ = local->hw.radiotap_mcs_details;
*pos = 0;
@@ -267,6 +269,8 @@ ieee80211_add_rx_radiotap_header(struct ieee80211_local *local,
*pos |= IEEE80211_RADIOTAP_MCS_BW_40;
if (status->flag & RX_FLAG_HT_GF)
*pos |= IEEE80211_RADIOTAP_MCS_FMT_GF;
+ stbc = (status->flag & RX_FLAG_STBC_MASK) >> RX_FLAG_STBC_SHIFT;
+ *pos |= stbc << IEEE80211_RADIOTAP_MCS_STBC_SHIFT;
pos++;
*pos++ = status->rate_idx;
}
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