mac80211: propagate STBC / LDPC flags to radiotap

This capabilities weren't propagated to the radiotap header.
We don't set here the VHT_KNOWN / MCS_HAVE flag because not
all the low level drivers will know how to properly flag
the frames, hence the low level driver will be in charge
of setting IEEE80211_RADIOTAP_MCS_HAVE_FEC,
IEEE80211_RADIOTAP_MCS_HAVE_STBC and / or
IEEE80211_RADIOTAP_VHT_KNOWN_STBC according to its
capabilities.

Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

1 files changed, 7 insertions, 0 deletions

diff --git a/net/mac80211/rx.c b/net/mac80211/rx.c
index e81cab3ca157..593062109c50 100644
--- a/net/mac80211/rx.c
+++ b/net/mac80211/rx.c
@@ -279,6 +279,8 @@ 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;
+                if (status->flag & RX_FLAG_LDPC)
+                        *pos |= IEEE80211_RADIOTAP_MCS_FEC_LDPC;
                 stbc = (status->flag & RX_FLAG_STBC_MASK) >> RX_FLAG_STBC_SHIFT;
                 *pos |= stbc << IEEE80211_RADIOTAP_MCS_STBC_SHIFT;
                 pos++;
@@ -328,6 +330,9 @@ ieee80211_add_rx_radiotap_header(struct ieee80211_local *local,
                 /* flags */
                 if (status->flag & RX_FLAG_SHORT_GI)
                         *pos |= IEEE80211_RADIOTAP_VHT_FLAG_SGI;
+                /* in VHT, STBC is binary */
+                if (status->flag & RX_FLAG_STBC_MASK)
+                        *pos |= IEEE80211_RADIOTAP_VHT_FLAG_STBC;
                 pos++;
                 /* bandwidth */
                 if (status->vht_flag & RX_VHT_FLAG_80MHZ)
@@ -344,6 +349,8 @@ ieee80211_add_rx_radiotap_header(struct ieee80211_local *local,
                 *pos = (status->rate_idx << 4) | status->vht_nss;
                 pos += 4;
                 /* coding field */
+                if (status->flag & RX_FLAG_LDPC)
+                        *pos |= IEEE80211_RADIOTAP_CODING_LDPC_USER0;
                 pos++;
                 /* group ID */
                 pos++;