Add a new feature bit signifying that the wireless hardware supports
changing the mac address while the underlying net_device is UP. Note
that this is slightly different from IFF_LIVE_ADDR_CHANGE as additional
restrictions might be imposed by the hardware. Typical restrictions
are:
- No connection is active on this interface, e.g. carrier is off
- No scan is in progress
- No offchannel operation is in progress
Signed-off-by: James Prestwood <[email protected]>
---
include/uapi/linux/nl80211.h | 9 +++++++++
1 file changed, 9 insertions(+)
diff --git a/include/uapi/linux/nl80211.h b/include/uapi/linux/nl80211.h
index bf7c4222f512..0ceb945a08fb 100644
--- a/include/uapi/linux/nl80211.h
+++ b/include/uapi/linux/nl80211.h
@@ -5481,6 +5481,14 @@ enum nl80211_feature_flags {
* @NL80211_EXT_FEATURE_SAE_OFFLOAD: Device wants to do SAE authentication in
* station mode (SAE password is passed as part of the connect command).
*
+ * @NL80211_EXT_FEATURE_LIVE_ADDR_CHANGE: Device can perform a MAC address
+ * change without having to bring the underlying network device down
+ * first. For example, in station mode this can be used to vary the
+ * origin MAC address prior to a connection to a new AP for privacy
+ * or other reasons. Note that certain driver specific restrictions
+ * might apply, e.g. no scans in progress, no offchannel operations
+ * in progress, and no active connections.
+ *
* @NUM_NL80211_EXT_FEATURES: number of extended features.
* @MAX_NL80211_EXT_FEATURES: highest extended feature index.
*/
@@ -5526,6 +5534,7 @@ enum nl80211_ext_feature_index {
NL80211_EXT_FEATURE_EXT_KEY_ID,
NL80211_EXT_FEATURE_STA_TX_PWR,
NL80211_EXT_FEATURE_SAE_OFFLOAD,
+ NL80211_EXT_FEATURE_LIVE_ADDRESS_CHANGE,
/* add new features before the definition below */
NUM_NL80211_EXT_FEATURES,
--
2.17.1
