mac80211: support radiotap vendor namespace RX data

In some cases, in particular for experimentation, it
can be useful to be able to add vendor namespace data
to received frames in addition to the normal radiotap
data.

Allow doing this through mac80211 by adding fields to
the RX status descriptor that describe the data while
the data itself is prepended to the frame.

Also add some example code to hwsim, but don't enable
it because it doesn't use a proper OUI identifier.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>

1 files changed, 12 insertions, 0 deletions

diff --git a/include/net/mac80211.h b/include/net/mac80211.h
index b484a6569eac..dd08fbb3cf28 100644
--- a/include/net/mac80211.h
+++ b/include/net/mac80211.h
@@ -789,12 +789,21 @@ enum mac80211_rx_flags {
  * @ampdu_reference: A-MPDU reference number, must be a different value for
  *      each A-MPDU but the same for each subframe within one A-MPDU
  * @ampdu_delimiter_crc: A-MPDU delimiter CRC
+ * @vendor_radiotap_bitmap: radiotap vendor namespace presence bitmap
+ * @vendor_radiotap_len: radiotap vendor namespace length
+ * @vendor_radiotap_align: radiotap vendor namespace alignment. Note
+ *      that the actual data must be at the start of the SKB data
+ *      already.
+ * @vendor_radiotap_oui: radiotap vendor namespace OUI
+ * @vendor_radiotap_subns: radiotap vendor sub namespace
  */
 struct ieee80211_rx_status {
         u64 mactime;
         u32 device_timestamp;
         u32 ampdu_reference;
         u32 flag;
+        u32 vendor_radiotap_bitmap;
+        u16 vendor_radiotap_len;
         u16 freq;
         u8 rate_idx;
         u8 rx_flags;
@@ -802,6 +811,9 @@ struct ieee80211_rx_status {
         u8 antenna;
         s8 signal;
         u8 ampdu_delimiter_crc;
+        u8 vendor_radiotap_align;
+        u8 vendor_radiotap_oui[3];
+        u8 vendor_radiotap_subns;
 };
 
 /**